AN ABSTRACT OF THE THESIS OF
Justin R. Mart for the degree of Master of Science in Nuclear Engineering presented on June
14, 2013.
Title: Feasibility Study on a Soluble Boron-Free Small Modular Reactor
Abstract approved:
___________________________________________________________________________
Andrew C. Klein
The elimination of soluble boron creates several advantages for Small Modular Reactor
(SMR) operation. Most of these advantages are realized through significant core simplification
(removal of pipes, pumping, and purification systems), the removal of the corrosive effects of
soluble boron, and from improved safety effects. However, removing soluble boron creates its
own set of specific challenges that must be overcome.
Traditional pressurized water reactors employ soluble boron for uniform power suppression
throughout the core. Thus any boron-free SMR design requires increased dependence on
control rods and burnable poisons, where both are discrete neutron absorbers that locally
impact the core where they are inserted. Since control rods are partially inserted, their
presence negatively impacts the axial power profile and this distortion creates undesirable
power peaks, leading to a reduced operating margin and a significant economic burden.
Thus, the main challenge in any boron free design concerns excess reactivity suppression and
active reactivity control while maintaining a proper axial power profile and reduced power
peaks. The goal of the feasibility study is to investigate the physical effects of removing
soluble boron, and to investigate and identify an effective strategy for containing power peaks
in a boron-free SMR. Studsvik's CASMO-4E was employed to solve 2-D Transport equation
for infinite lattice analysis, and SIMULATE-3K was employed to solve 3-D nodal diffusion
equation for full core analysis.
The study identified improved reactivity feedback mechanisms associated with the removal of
soluble boron, arising from a softened neutron flux and a decreased production of plutonium.
An analysis of strategies for soluble boron-free operation that involved axially grading
burnable poisons and U235 enrichment percentages was found unable to be able to control the
axial power profile throughout core lifetime. The inherent limitations in the lifetime of
burnable poisons resulted in an inability to control the axial power profile through middle and
end of cycle. Investigations of additional strategies involving an advanced control rod
algorithm produced significantly improved results that met the prescribed criteria for success.
The advanced control rod algorithm is thus recognized as a viable strategy for boron-free
operation for SMRs.
© Copyright by Justin R. Mart
June 14, 2013
All Rights Reserved
Feasibility Study on a Soluble Boron-Free Small Modular Reactor
by
Justin R. Mart
A THESIS
submitted to
Oregon State University
in partial fulfillment of
the requirements for the
degree of
Master of Science
Presented June 14, 2013
Commencement June 2014
Master of Science thesis of Justin R. Mart presented on June 14, 2013.
APPROVED:
___________________________________________________________________________
Major Professor, representing Nuclear Engineering
___________________________________________________________________________
Head of the Department of Nuclear Engineering and Radiation Health Physics
___________________________________________________________________________
Dean of the Graduate School
I understand that my thesis will become part of the permanent collection of Oregon State
University libraries. My signature below authorizes release of my thesis to any reader upon
request.
___________________________________________________________________________
Justin R. Mart, Author
ACKNOWLEDGEMENTS
I would like to express sincere thanks to my advisor, Dr. Andrew Klein, for his immense
patience, guidance, and support through the scope of this project, helping me become a better
student and person.
I would also like to thank Dr. Alexey Soldatov for his specific help in navigating and
analyzing the reactor analysis software. The faculty members of Oregon State University
deserve credit for providing immense knowledge and support in the several aspects of this
project, as do the members of Dr. Klein’s Fringe group of Nuclear Engineering students for
their moral encouragement and technical help.
Lastly, I would like to acknowledge and thank all the people in my life that have encouraged
and supported me. My family in friends in particular, as without their support I would never
have found myself in this position.
TABLE OF CONTENTS
Page
Chapter 1 - Introduction.............................................................................................................. 1
1.1 Overview of Nuclear Reactor Physics and Key Concepts ................................................ 2
1.1.1 Criticality and Multiplication Factors........................................................................ 2
1.1.2 Prompt Neutron Lifetime and Delayed Neutron Fractions ........................................ 4
1.1.3 Power Peaks and Pin Peaking Factors ....................................................................... 6
1.1.4 Survey of the Different Methods of Excess Reactivity Compensation ..................... 7
1.2 Advantages and Disadvantages to Soluble Boron-Free Operation ................................. 13
1.2.1 Differences between Small Modular Reactors and Typical Light Water Reactors . 14
1.2.2 Advantages of Soluble Boron-Free Operation in Small Modular Reactors ............ 15
1.2.3 Disadvantages to Soluble Boron-Free Operation in Small Modular Reactors ........ 17
Chapter 2 – Literature Review .................................................................................................. 19
2.1 Survey of Current SMR Designs .................................................................................... 19
2.1.1 Babcock and Wilcox mPower ................................................................................. 19
2.1.2 NuScale Power SMR ............................................................................................... 20
2.1.3 Westinghouse SMR ................................................................................................. 21
2.2 Relevant Soluble Boron-Free Research and Development ............................................. 22
2.2.1 Feasibility Studies of a Soluble Boron-Free 900-MWe PWR ................................. 22
2.2.2 Elimination of Soluble-Boron for a New PWR Design........................................... 24
2.2.3 A Soluble Boron-Free Core Design for the IRIS-50 ............................................... 24
2.2.4 Nuclear and Thermal Hydraulic Design Characteristics of the SMART Core........ 26
Chapter 3 - Methodology .......................................................................................................... 28
3.1 Definition of research goals ............................................................................................ 28
3.2 Criteria for Success ......................................................................................................... 28
3.2.1 Criteria for Axial Offset .......................................................................................... 29
3.2.2 Criteria for Maximum Pin Peaking Factors ............................................................. 32
2.3 Available Tools for Reactor Design and Analysis.......................................................... 34
Chapter 4 – Reactor Design and Analysis ................................................................................ 37
4.1 The Selected SMR Design with Fuel Assembly Geometry and Characteristics ............ 37
4.2 Physical Effects of Soluble Boron-Free Operation ......................................................... 40
4.2.1 Multiplication Factor with and without Burnable Poisons ...................................... 40
TABLE OF CONTENTS (Continued)
Page
4.2.2 Fuel Depletion and Plutonium Production .............................................................. 42
4.2.3. Neutron Flux and Energy Spectra .......................................................................... 46
4.2.4 Effective Fraction of Delayed Neutrons .................................................................. 49
4.2.5 Reactivity Feedback Mechanisms ........................................................................... 50
4.2.6 Conclusion ............................................................................................................... 56
4.3 Development and Analysis of Fuel Assemblies for use in Full Core Environment ....... 57
4.3.1 Burnable Poison Search ........................................................................................... 58
4.4 Description and Analysis of Initial Strategies for Soluble Boron-Free Operation in the
Selected SMR Design ........................................................................................................... 76
4.4.1 Full Core Radial Loading Geometry ....................................................................... 76
4.4.2 Full Core Axial Loading Geometry ......................................................................... 79
Chapter 5 - Results ................................................................................................................... 84
5.1 First Group of Axially Graded SMR Cores .................................................................... 86
5.1.1 First Axially Graded SMR Core .............................................................................. 86
5.1.2 Further Axially Graded SMR cores from the First Group ....................................... 92
5.2 Second Group of Axially Graded SMR Cores................................................................ 97
5.2.1 First Core from Second Group of Axially Graded SMR cores................................ 97
5.2.2 Further Axially Graded SMR cores from the Second Group ................................ 102
5.3 Third Group of Axially Graded SMR Cores ................................................................ 107
5.3.1 First Core from Third Group of Axially Graded SMR Cores................................ 107
5.3.2 Further Axially Graded SMR cores from the Third Group ................................... 113
5.3 Fourth Group of Axially Graded SMR Cores ............................................................... 117
5.3.1 First core from Fourth group of axially graded SMR cores .................................. 118
5.3.2 Further Axially Graded SMR cores from the Fourth Group ................................. 124
5.5 Fifth Group of Axially Graded SMR Cores.................................................................. 129
5.5.1 First Core from Fifth Group of Axially Graded Cores .......................................... 131
5.5.2 Further Axially Graded SMR Cores from the Fifth Group ................................... 136
5.6 Conclusion .................................................................................................................... 143
Chapter 6 – Further Strategies for Soluble Boron-Free Operation ......................................... 144
6.1 Feasibility of the Advanced Control Rod Algorithm.................................................... 145
TABLE OF CONTENTS (Continued)
Page
6.2 Final Advanced Control Rod Algorithm ...................................................................... 148
Chapter 7 – Conclusions ......................................................................................................... 153
7.1 Future Work .................................................................................................................. 156
7.1.1 Further Control Rod Algorithms and Axial Loading Strategies ............................ 156
7.1.2 Gadolinia-Oxide Burnable Poison Pellets ............................................................. 156
7.1.3 Partial Elimination of Soluble Boron .................................................................... 157
Bibliography ........................................................................................................................... 158
General Publications ........................................................................................................... 158
International Atomic Energy Agency Documents and Publications .................................. 163
Software Manuals and Descriptions ................................................................................... 164
Regulatory Documents ....................................................................................................... 165
Appendix ................................................................................................................................ 167
LIST OF FIGURES
Figure
Page
Figure 1: Axial power profile of a hypothetical boron-free reactor core. ................................. 30
Figure 2: Averaged axial power profile of two hypothetical boron-free cores vs core height
(axial node). .............................................................................................................................. 31
Figure 3: Full core radial geometry. ......................................................................................... 39
Figure 4: kinf vs burnup for 5.0% U235 assemblies with varying amounts of soluble boron. .... 41
Figure 5: kinf vs burnup for poisoned 5.0% U235 fuel assemblies with varying amounts of
soluble boron. ........................................................................................................................... 42
Figure 6: Weight percent of total Plutonium (Pu239 + Pu241) vs burnup for 5.0% U235 enriched
fuel assemblies with varying amounts of soluble boron. .......................................................... 43
Figure 7: U238 neutron absorption cross section (barns) vs energy (MeV). ............................ 44
Figure 8: Total uranium and plutonium fission rate vs burnup in 5.0% U235 enriched fuel
assemblies with varying amounts of soluble boron. ................................................................. 45
Figure 9: Weight percent of U235 vs burnup in 5.0% U235 enriched fuel assemblies with varying
amounts of soluble boron.......................................................................................................... 46
Figure 10: Total neutron flux vs burnup for 5.0% U235 enriched fuel assembly. ..................... 47
Figure 11: Fast neutron flux vs burnup for 5.0% U235 enriched assemblies. ............................ 48
Figure 12: Thermal neutron flux vs burnup for 5.0% U235 enriched assemblies. ..................... 48
Figure 13: Effective delayed neutron yield vs burnup for 5.0% U235 fuel assemblies. ............. 50
Figure 14: Fuel temperature coefficient vs burnup for hot full power, cold full power, and cold
zero power with and without soluble boron.............................................................................. 53
Figure 15: Moderator temperature coefficient for hot full power, cold full power, and cold
zero power with and without soluble boron.............................................................................. 55
Figure 16: kinf vs burnup for a poisoned and non-poisoned fuel assembly. .............................. 59
Figure 17: Burnable poison loading geometry for each of the 5 major groups. Red indicates a
control rod, blue is a poisoned fuel pin, and white is a regular fuel pin. .................................. 60
Figure 18: kinf vs burnup for fuel each major burnable poison loading geometry. ................... 61
Figure 19: kinf vs burnup for 5.0% U235 enriched fuel assemblies with variations of all 5 BP
geometries and with individually varied Gd2O3 weight percentages. ....................................... 63
Figure 20: kinf vs burnup for BP geometry 1 and 3, with 12% and 2% w/o Gd2O3. ................. 64
Figure 21: kinf vs burnup for final 5 fuel assemblies that exhibit a flat burnup profile............. 65
Figure 22: Poisoned pin geometry for fuel assemblies with strong initial reactivity
compensation and quick Gd2O3 depletion. ............................................................................... 67
Figure 23: kinf vs burnup for 5.0% U235 fuel assemblies with 64 poisoned pins. ...................... 67
Figure 24: Burnable poison loading geometry with 52 and 64 poisoned pins.......................... 68
LIST OF FIGURES (Continued)
Figure
Page
235
Figure 25: kinf vs burnup for 5.0% U enriched fuel assemblies with 52 and 56 pins poisoned
with 5.0% and 6.0% w/o Gd2O3. .............................................................................................. 69
Figure 26: Five different burnable poison loading geometries for fuel assemblies with strong
initial reactivity compensation and slow depletion................................................................... 70
Figure 27: kinf vs burnup for 5.0% U235 enriched fuel assemblies with various numbers of
poisoned fuel pins at 5.0% w/o Gd2O3...................................................................................... 71
Figure 28: kinf vs burnup for 5.0% U235 enriched fuel assemblies with various numbers of
poisoned fuel pins at 6.0% w/o Gd2O3...................................................................................... 72
Figure 29: Five different burnable poison loading geometries for fuel assemblies with
extraordinarily large initial reactivity compensation. ............................................................... 73
Figure 30: kinf vs burnup for 5.0% U235 enriched fuel assemblies with various numbers of
poisoned fuel pins (from Figure 29) at 2.0% w/o Gd2O3. ......................................................... 74
Figure 31: kinf vs burnup for 5.0% U235 enriched fuel assemblies with various numbers of
poisoned fuel pins (from Figure 29) at 3.0% w/o Gd2O3. ......................................................... 74
Figure 32: kinf vs burnup for 5.0% U235 enriched fuel assemblies with various numbers of
poisoned fuel pins (from Figure 29) at 4.0% w/o Gd2O3. ......................................................... 75
Figure 33: 2-Dimensional U235 Enrichment Loading Geometry............................................... 77
Figure 34: Relative power fraction for the U235 enrichment loading geometry. ....................... 78
Figure 35: Natural power profile for soluble boron-free core at BOC and EOC...................... 82
Figure 36: Full core symmetry. ................................................................................................ 85
Figure 37: Burnable poison loading and average U235 enrichment vs core height for the first
core in the first group of axially graded cores. ......................................................................... 86
Figure 38: 5.0% U235 enriched “Flat burn” fuel assemblies that were employed in the first
group of axially graded cores. .................................................................................................. 87
Figure 39: Average burnable poison loading (grams) per node for the first axial core. ........... 88
Figure 40: Fuel assembly U235 enrichment per node for the first axial core. ............................ 89
Figure 41: Axial offset and control rod insertion vs burnup for the first core. ......................... 91
Figure 42: Maximum total peaking factor vs burnup for the first core and soluble boron core.
.................................................................................................................................................. 91
Figure 43: Burnable poison loading vs core height for all cores in the first group of axially
graded cores. ............................................................................................................................. 93
Figure 44: Average U235 enrichment vs core height for the first group of axially graded cores.
.................................................................................................................................................. 94
Figure 45: Axial power offset vs burnup for the first group of axially graded cores. .............. 95
Figure 46: Control rod insertion vs burnup for the first group of axially graded cores. ........... 95
LIST OF FIGURES (Continued)
Figure
Page
Figure 47: Maximum total peaking factor vs burnup for the first group of axially graded cores.
.................................................................................................................................................. 96
Figure 48: Burnable poison loading and average U235 enrichment vs core height for the 9th
core. .......................................................................................................................................... 98
Figure 49: Average burnable poison loading (grams) per node for the 9th core. ..................... 99
Figure 50: Fuel assembly U235 enrichment per node for the 9th core. .................................... 100
Figure 51: Axial offset and control rod insertion percentage vs burnup for the 9th core. ...... 101
Figure 52: Maximum total peaking factor vs burnup for the 9th core. ................................... 102
Figure 53: Burnable poison loading vs core height for the 2nd group of axially graded cores.
................................................................................................................................................ 103
Figure 54: Average U235 enrichment vs core height for the 2nd group of axially graded cores.
................................................................................................................................................ 104
Figure 55: Axial power offset vs burnup for the 2nd group of axially graded cores. ............. 105
Figure 56: Control rod insertion for the second group of axially graded cores. ..................... 105
Figure 57: kinf vs burnup for fuel assemblies used in cores 11 and 12. .................................. 106
Figure 58: Maximum total peaking factor vs burnup for the second group of cores. ............. 107
Figure 59: kinf vs burnup for fuel assemblies used in the third group of cores. ...................... 108
Figure 60: Burnable poison loading and average U235 enrichment vs core height for the first
core in the third group of axially graded cores. ...................................................................... 109
Figure 61: Average burnable poison loading (grams) per node for the 14th core. ................. 110
Figure 62: Assembly U235 enrichment per node for the 14th core. ......................................... 111
Figure 63: Axial offset and control rod insertion percentage vs burnup for the 14th core. .... 112
Figure 64: Maximum total peaking factor vs burnup for the 14th core and a soluble boron
core. ........................................................................................................................................ 113
Figure 65: Burnable poison loading vs core height for the third group of cores. ................... 114
Figure 66: Average U235 enrichment vs core height for the third group of cores. .................. 114
Figure 67: Axial power offset vs burnup for the third group of cores. ................................... 115
Figure 68: Control rod insertion vs burnup for the third group of cores. ............................... 116
Figure 69: Maximum total peaking factor vs burnup for the third group of cores. ................ 117
Figure 70: Burnable poison loading and average U235 enrichment vs core height for the 23rd
core. ........................................................................................................................................ 119
Figure 71: kinf vs burnup for the fuel assemblies used in the fourth group of cores. .............. 120
Figure 72: Average burnable poison loading (grams) per node for the 23rd core. ................. 121
LIST OF FIGURES (Continued)
Figure
Page
235
Figure 73: Fuel assembly U
enrichment per node for the 23rd core. .................................. 122
Figure 74: Axial offset and control rod insertion vs burnup for the 23rd core. ...................... 123
Figure 75: Maximum total peaking factor vs burnup for the 23rd core and a soluble boron
core. ........................................................................................................................................ 124
Figure 76: Burnable poison loading vs core height for the fourth group of cores. ................. 125
Figure 77: Average U235 enrichment vs core height for the fourth group of cores. ................ 126
Figure 78: Axial power offset vs burnup for the fourth group of cores. ................................. 127
Figure 79: Control rod insertion vs burnup for the fourth group of cores. ............................. 128
Figure 80: Maximum total peaking factor vs burnup for the fourth group of cores. .............. 129
Figure 81: kinf vs burnup for fuel assemblies used in the fifth group of cores. ....................... 130
Figure 82: Burnable poison loading and average U235 enrichment vs core height for the 30th
core. ........................................................................................................................................ 131
Figure 83: Average burnable poison loading (grams) per node for the 30th core. ................. 133
Figure 84: Fuel assembly U235 enrichment per node for the 30th core. .................................. 134
Figure 85: Axial offset and control rod insertion vs burnup for the 30th core. ...................... 135
Figure 86: Maximum total peaking factor vs burnup for the 30th core. ................................. 136
Figure 87: Burnable poison loading vs core height for the fifth group of cores. .................... 136
Figure 88: Average U235 enrichment vs core height for the fifth group of cores. ................... 137
Figure 89: Axial power offset vs burnup for the fifth group of cores..................................... 138
Figure 90: Control rod insertion vs burnup for the fifth group of cores. ................................ 139
Figure 91: Relative power fraction and average exposure at 11 MWd/Kg for core 34. ......... 140
Figure 92: Maximum total peaking factor vs burnup for the fifth group of cores. ................. 141
Figure 93: Depletion stages for an initial control rod algorithm designed to contain the axial
power profile........................................................................................................................... 146
Figure 94: Axial offset and control rod insertion vs burnup for the initial control algorithm.147
Figure 95: Maximum total peaking factor vs burnup for the initial control rod algorithm. ... 148
Figure 96: kinf vs burnup for the fuel assembly used in the final control rod algorithm. ........ 149
Figure 97: Fuel assembly U235 enrichment and burnable poison loading profile for the final
advanced control rod algorithm. ............................................................................................. 149
Figure 98: Depletion stages for the final advanced control rod algorithm. ............................ 150
Figure 99: Axial offset and control rod insertion percentage vs burnup for the final control rod
algorithm. ................................................................................................................................ 151
LIST OF FIGURES (Continued)
Figure
Page
Figure 100: Maximum pin peaking factor vs burnup for the final control rod algorithm. ..... 152
Figure 101: Axial offset vs burnup for the boron-free core with axially graded burnable
poisons, the boron-free core with the final control rod algorithm, and for a soluble boron core.
................................................................................................................................................ 154
Figure 102: Maximum pin peaking factor vs burnup for the boron-free core with axially
graded burnable poisons, the boron-free core with the final control rod algorithm, and for a
soluble boron core................................................................................................................... 155
Figure 103: Average burnable poison loading (grams) per node for the 1st core .................. 168
Figure 104: Fuel assembly U235 enrichment per node for the 1st core. .................................. 169
Figure 105: Average burnable poison loading (grams) per node for the 2nd core. ................ 170
Figure 106: Fuel assembly U235 enrichment per node for the 2nd core. ................................. 171
Figure 107: Average burnable poison loading (grams) per node for the 3rd core. ................. 172
Figure 108: Fuel assembly U235 enrichment per node for the 3rd core. .................................. 173
Figure 109: Average burnable poison loading (grams) per node for the 4th core .................. 174
Figure 110: Fuel assembly U235 enrichment per node for the 4th core. .................................. 175
Figure 111: Average burnable poison loading (grams) per node for the 5th core. ................. 176
Figure 112: Fuel assembly U235 enrichment per node for the 5th core. .................................. 177
Figure 113: Average burnable poison loading (grams) per node for the 6th core. ................. 178
Figure 114: Fuel assembly U235 enrichment per node for the 6th core. .................................. 179
Figure 115: Average burnable poison loading (grams) per node for the 7th core. ................. 180
Figure 116: Fuel assembly U235 enrichment per node for the 7th core. .................................. 181
Figure 117: Average burnable poison loading (grams) per node for the 8th core. ................. 182
Figure 118: Fuel assembly U235 enrichment per node for the 8th core. .................................. 183
Figure 119: Average burnable poison loading (grams) per node for the 9th core. ................. 184
Figure 120: Fuel assembly U235 enrichment per node for the 9th core. .................................. 185
Figure 121: Average burnable poison loading (grams) per node for the 10th core. ............... 186
Figure 122: Fuel assembly U235 enrichment per node for the 10th core. ................................ 187
Figure 123: Average burnable poison loading (grams) per node for the 11th core. ............... 188
Figure 124: Fuel assembly U235 enrichment per node for the 11th core. ................................ 189
Figure 125: Average burnable poison loading (grams) per node for the 12th core. ............... 190
Figure 126: Fuel assembly U235 enrichment per node for the 12th core. ................................ 191
Figure 127: Average burnable poison loading (grams) per node for the 13th core. ............... 192
LIST OF FIGURES (Continued)
Figure
Page
235
Figure 128: Fuel assembly U
enrichment per node for the 13th core. ................................ 193
Figure 129: Average burnable poison loading (grams) per node for the 14th core. ............... 194
Figure 130: Fuel assembly U235 enrichment per node for the 14th core. ................................ 195
Figure 131: Average burnable poison loading (grams) per node for the 15th core. ............... 196
Figure 132: Fuel assembly U235 enrichment per node for the 15th core. ................................ 197
Figure 133: Average burnable poison loading (grams) per node for the 16th core. ............... 198
Figure 134: Fuel assembly U235 enrichment per node for the 16th core. ................................ 199
Figure 135: Average burnable poison loading (grams) per node for the 17th core. ............... 200
Figure 136: Fuel assembly U235 enrichment per node for the 17th core. ................................ 201
Figure 137: Average burnable poison loading (grams) per node for the 18th core. ............... 202
Figure 138: Fuel assembly U235 enrichment per node for the 18th core. ................................ 203
Figure 139: Average burnable poison loading (grams) per node for the 19th core. ............... 204
Figure 140: Fuel assembly U235 enrichment per node for the 19th core. ................................ 205
Figure 141: Average burnable poison loading (grams) per node for the 20th core. ............... 206
Figure 142: Fuel assembly U235 enrichment per node for the 20th core. ................................ 207
Figure 143: Average burnable poison loading (grams) per node for the 21st core. ............... 208
Figure 144: Fuel assembly U235 enrichment per node for the 21st core. ................................ 209
Figure 145: Average burnable poison loading (grams) per node for the 22nd core. .............. 210
Figure 146: Fuel assembly U235 enrichment per node for the 22nd core. ............................... 211
Figure 147: Average burnable poison loading (grams) per node for the 23rd core. ............... 212
Figure 148: Fuel assembly U235 enrichment per node for the 23rd core. ................................ 213
Figure 149: Average burnable poison loading (grams) per node for the 24th core. ............... 214
Figure 150: Fuel assembly U235 enrichment per node for the 24th core. ................................ 215
Figure 151: Average burnable poison loading (grams) per node for the 25th core. ............... 216
Figure 152: Fuel assembly U235 enrichment per node for the 25th core. ................................ 217
Figure 153: Average burnable poison loading (grams) per node for the 26th core. ............... 218
Figure 154: Fuel assembly U235 enrichment per node for the 26th core. ................................ 219
Figure 155: Average burnable poison loading (grams) per node for the 27th core. ............... 220
Figure 156: Fuel assembly U235 enrichment per node for the 27th core. ................................ 221
Figure 157: Average burnable poison loading (grams) per node for the 28th core. ............... 222
Figure 158: Fuel assembly U235 enrichment per node for the 28th core. ................................ 223
LIST OF FIGURES (Continued)
Figure
Page
Figure 159: Average burnable poison loading (grams) per node for the 29th core. ............... 224
Figure 160: Fuel assembly U235 enrichment per node for the 29th core. ................................ 225
Figure 161: Average burnable poison loading (grams) per node for the 30th core. ............... 226
Figure 162: Fuel assembly U235 enrichment per node for the 30th core. ................................ 227
Figure 163: Average burnable poison loading (grams) per node for the 31st core. ............... 228
Figure 164: Fuel assembly U235 enrichment per node for the 31st core. ................................ 229
Figure 165: Average burnable poison loading (grams) per node for the 33rd core. ............... 230
Figure 166: Fuel assembly U235 enrichment per node for the 33rd core. ................................ 231
Figure 167: Average burnable poison loading (grams) per node for the 34th core. ............... 232
Figure 168: Fuel assembly U235 enrichment per node for the 34th core. ................................ 233
LIST OF TABLES
Table
Page
Table 1: SMR Fuel Assembly Specifications ........................................................................... 38
Table 2: SMR Full Core Specifications .................................................................................... 39
Feasibility Study on a Soluble Boron-Free Small Modular Reactor
Chapter 1 - Introduction
The world’s energy sector is currently driven by a majority of fossil fuel power plants.
In order to address and meet national and global requirements for clean, efficient, and
consistent energy production designed to meet a growing demand for energy from developing
nations, new and innovative nuclear reactor technologies will need to be developed. Part of
this initiative includes the potential for smaller, modular nuclear reactors (SMRs) [6, 32, 33].
These SMRs possess inherent safety advantages, and have the potential to be deployed
in developing nations without the infrastructure needed for traditional nuclear power plants
[44]. In this vein, any improvement to the inherent safety features and overall reactor
operation in SMRs is of value.
The presence of soluble boron diluted in the coolant is typical in most current SMR
designs [46], despite the inherent safety and reliability advantages that could be realized upon
its removal [15, 24, 43]. While removing soluble boron brings inherent advantages, it also
significantly complicates the manner in which the nuclear core is operated. These
complications make effective operation of a soluble boron-free core difficult. This study aims
to design an effective soluble boron-free SMR and investigate how the removal of soluble
boron from normal operations impacts core behavior.
State of the art tools used for modeling traditional LWRs was employed to evaluate
different design strategies, and to generate data for analysis of boron-free operation. The study
is organized in the following manner:
1) Overview of nuclear reactor physics and key concepts
2) Description of advantages and disadvantages for soluble boron-free operation
3) Literature review of current SMR designs and previous boron-free research
4) Investigation on the physical effects of soluble boron-free operation
5) Search for a soluble boron-free SMR core design that meets design criteria
6) Conclusions
2
1.1 Overview of Nuclear Reactor Physics and Key Concepts
Nuclear reactor operation is centered on ensuring the chain reaction maintains criticality
while providing sufficient heat removal to avoid meltdown. The operations involving heat
removal are relegated to the thermal hydraulic discipline, while concerns about criticality
involve neutronic calculations within the reactor core. This distinction provides an effective
divide between two largely separate disciplines. This study focuses primarily with the nuclear
core and issues relating to its operation and behavior. It is assumed that normal operating
conditions exist, i.e. that there will always be sufficient heat removal for the operating
specifications provided.
1.1.1 Criticality and Multiplication Factors
A working definition of criticality involves a quick survey of neutron behavior in a
nuclear reactor. In traditional Light Water Reactors (LWRs), so named for their use of light
water as both a moderator and coolant, U235 is employed as fuel. When a neutron is absorbed
in U235, it undergoes a fission process that splits the atom in two, creating two smaller
elements. As it turns out, this process is exothermic, releasing the bulk of excess energy
through kinetic energy in the smaller fission products. But it also releases an assortment of
gamma rays, anti-neutrinos, and neutrons themselves. On average, for reactions typical to
LWRs, each fission event produces 2.4 extra neutrons. If properly engineered, these neutrons
can be absorbed in another U235, creating a chain of fission reactions that is the backbone of
nuclear reactors.
In mathematical terms, criticality is defined by the rate of change of the neutron
population in the core. This rate of change equation begins as:
𝑑
𝑛(𝑡) = # 𝑜𝑓 𝑠𝑜𝑢𝑟𝑐𝑒 𝑛𝑒𝑢𝑡𝑟𝑜𝑛𝑠 𝑝𝑟𝑜𝑑𝑢𝑐𝑒𝑑 − # 𝑜𝑓 𝑛𝑒𝑢𝑡𝑟𝑜𝑛𝑠 𝑙𝑜𝑠𝑡
𝑑𝑡
For nuclear reactors, the only significant process producing neutrons are fission events
within the fuel. Additionally, the only methods by which neutrons are lost are absorption
events that do not produce fission events, and neutrons leaking from the system. Reflecting
this, the rate of change of neutrons can be defined as:
3
𝑑
𝑛(𝑡) = # 𝑜𝑓 𝑓𝑖𝑠𝑠𝑖𝑜𝑛 𝑛𝑒𝑢𝑡𝑟𝑜𝑛𝑠 𝑝𝑟𝑜𝑑𝑢𝑐𝑒𝑑 − (# 𝑜𝑓 𝑛𝑒𝑢𝑡𝑟𝑜𝑛𝑠 𝑎𝑏𝑠𝑜𝑟𝑏𝑒𝑑
𝑑𝑡
+ # 𝑜𝑓 𝑛𝑒𝑢𝑡𝑟𝑜𝑛𝑠 𝑙𝑒𝑎𝑘𝑖𝑛𝑔 𝑓𝑟𝑜𝑚 𝑡ℎ𝑒 𝑠𝑦𝑠𝑡𝑒𝑚)
While this definition is useful on a technical scale, it is more useful to employ the
concept of a multiplication factor, describing the balance between neutron production and
neutron loss:
𝑘0 =
𝑅𝑎𝑡𝑒 𝑜𝑓 𝑛𝑒𝑢𝑡𝑟𝑜𝑛 𝑝𝑟𝑜𝑑𝑢𝑐𝑡𝑖𝑜𝑛 𝑖𝑛 𝑟𝑒𝑎𝑐𝑡𝑜𝑟 𝐺(𝑡)
=
𝑅𝑎𝑡𝑒 𝑜𝑓 𝑛𝑒𝑢𝑡𝑟𝑜𝑛 𝑙𝑜𝑠𝑠 𝑖𝑛 𝑟𝑒𝑎𝑐𝑡𝑜𝑟
𝐿(𝑡)
In this manner, it is easy to see that if the value of 𝑘0 < 1 then the number of neutrons
will decay to 0, representing a situation where less than one neutron (on average) produces a
fission event, and the neutron economy logarithmically declines until no neutrons are left in
the system and the chain reaction dies. Conversely, if 𝑘0 > 1 then a situation where more than
one neutron (on average) produces a fission event and the neutron economy exponentially
grows until some other process prohibits more fission events. Appropriately, for steady-state
reactor operation the target is to engineer a system where 𝑘0 = 1, with exactly one neutron
(on average) from each fission event producing another fission event. The moment this ratio is
met, the reactor is said to be critical [26]. Any amount above or below is respectively dubbed
subcritical or supercritical.
Accordingly, if the number of neutrons in the system at time 𝑡 = 0 is 𝑁0 , then the
number of neutrons after the first generation will be:
𝑁1 = 𝐾0 𝑁0
If we further define the mean neutron lifetime as:
𝑙=
# 𝑜𝑓 𝑛𝑒𝑢𝑡𝑟𝑜𝑛𝑠 𝑖𝑛 𝑡ℎ𝑒 𝑠𝑦𝑠𝑡𝑒𝑚 𝑎𝑡 𝑡𝑖𝑚𝑒 (𝑡)
𝑁(𝑡)
=
𝑅𝑎𝑡𝑒 𝑜𝑓 𝑛𝑒𝑢𝑡𝑟𝑜𝑛 𝑙𝑜𝑠𝑠 𝑖𝑛 𝑡ℎ𝑒 𝑠𝑦𝑠𝑡𝑒𝑚 𝑎𝑡 𝑡𝑖𝑚𝑒 (𝑡) 𝐿(𝑡)
4
Then we can reformulate the neutron rate of change as:
𝑑
𝑛(𝑡) = 𝐺(𝑡) − 𝐿(𝑡) = 𝑘0 𝐿(𝑡) − 𝐿(𝑡)
𝑑𝑡
This is to say that the rate of change of neutrons in the system can be expressed as the
difference between the rate of neutron production and the rate of neutron loss. Here, the rate of
neutron production is put in terms of the multiplication factor and the rate of neutron loss, and
the equation simplifies to:
(𝑘0 − 1)
𝑑
𝑛(𝑡) = 𝑘0 𝐿(𝑡) − 𝐿(𝑡) = (𝑘0 − 1)𝐿(𝑡) =
𝑁(𝑡)
𝑙
𝑑𝑡
where 𝑁(𝑡) represents the number of neutrons in the system at time 𝑡. The solution to this
differential equation is:
𝑁(𝑡) = 𝑁(0)𝑒
�
(𝑘0 −1)
�𝑡
𝑙
if 𝑘0 and 𝑙 are independent of time. This final equation expresses the neutron population as a
function of time by employing both the multiplication factor and the mean neutron lifetime.
Provided that there is a nonzero number of initial neutrons, the only steady-state solution
exists when the reactor is critical (𝑘0 = 1).
1.1.2 Prompt Neutron Lifetime and Delayed Neutron Fractions
The final equation for the neutron population with respect to time through the
multiplication factor and the average neutron lifetime highlights how the overall neutron
economy in the core is impacted by the mean neutron lifetime. Specifically, the rate of neutron
growth is inversely proportional to the value of the mean neutron lifetime. In reactors with a
small mean neutron lifetime, small perturbations in 𝑘0 will quickly influence the overall
neutron population.
On a physical level, a thermal neutron is defined as a neutron in thermal equilibrium
with its surroundings [13]. At room temperature and atmospheric conditions, thermal neutrons
5
possess an average energy of 0.0025 eV and travel at approximately 2200 m/s [26]. Nuclear
reactors operate at much higher temperatures and pressures, which only increases the velocity
of thermal neutrons. Neutrons at such speeds will rapidly interact with reactor core material
through either scattering collisions or absorption events, resulting in an effective neutron total
lifetime from birth to death on the order of 10-6 seconds [13].
With such a quick neutron lifetimes, this would ordinarily make any nuclear reactor far
too responsive to control. If any amount of reactivity is added, the reactor would respond far
too fast for any human or mechanical intervention. The saving grace comes in the form of
delayed neutron fraction, or the fraction of neutrons that are emitted after the initial fission
event.
Most neutrons are produced instantaneously upon fission, and are hence referred to as
“prompt neutrons.” However, small portions of the overall fraction of neutrons are produced
after the initial fission, when some fission products are initially unstable and decay through the
emission of a neutron. These “delayed neutrons” account for approximately 0.27% of all
neutrons produced in a fission event for typical U235 fueled reactors [13]. Since the half-lives
of these various unstable fission products widely vary, so do individual delayed neutron
lifetimes. On average, the lifetime for delayed neutrons is on the order of seconds, not
microseconds. Thus, even though they only account for a tiny fraction of all neutrons, their
longer lifetime accounts for a significant increase in the overall average neutron lifetime. This
overall impact on the neutron economy creates a situation where reactor operators and core
designers can control reactor criticality through just the delayed neutron fraction, making it
possible to control criticality through human and mechanical intervention.
This places particular importance on the delayed neutron percentage throughout the
lifetime of the reactor. This value is impacted by several nuanced factors. Delayed neutrons
are born from fission products, and the fission products are functions of neutron energy
incident on U235. This neutron energy is in turn impacted by the overall neutron flux spectrum
within the core, which is in turn a function of several different variables. The exact nature of
how the delayed neutron fraction changes throughout burnup is difficult to define with
specificity, but its value is undoubtedly an important factor for the nuclear reactor engineer.
6
1.1.3 Power Peaks and Pin Peaking Factors
As part of LWR safety regulations, core designers must ensure specific temperature
limits are not surpassed in any postulated operating condition including anticipated accident
scenarios. The critical temperature limit in LWRs occurs at the center of the fuel pin, where if
temperatures exceed 2200K melting is likely to occur [38]. As part of a conservative design
analysis, several other constraints arise to ensure this one temperature limit is not exceeded.
One constraint involves the maximum power density for any specific fuel rod, and the
maximum power density for any specific fuel volume. Said mathematically, if P signifies
reactor power and V signifies core volume, then:
𝑃�′′′ =
𝑃
𝑉
which defines the core-averaged power density. Appropriately, the ratio of maximum power
density for any specific fuel volume to the core-averaged power density supplies a power
peaking factor:
𝐹𝑞 =
′′′
𝑃𝑚𝑎𝑥
𝑃�′′′
The value of this peaking factor signifies the general power density profile throughout
the reactor core. A large peaking factor signifies at least one hot spot in the reactor where the
power density is significantly larger than the core-average power density. Since power density
is directly related to neutron flux and fuel temperature, power peaking factors directly
correlate to fuel temperature design constraints. And since no part of a reactor core can exceed
the established temperature limits, a primary concern for the reactor design engineer is the
value of the maximum hot spot within a reactor core at all postulated operating conditions
[38]. A higher peaking factor must therefore drive down the overall power density of the core
in order to ensure this hot spot does not exceed the design constraints. This limits the
efficiency of the reactor and represents a significant economic loss to the utility.
As a result, limiting power peaking factors are a primary focus for core designers.
Minimizing the peaking factors is primarily a function of reactor physics, since non-uniform
7
distributions of fuel enrichment, the position of control rods and burnable poisons, and other
neutronic concerns largely influence the power density profile. Since removing soluble boron
from reactor operations involves a greater dependence on control rods and burnable poisons,
the effect on peaking factors must be carefully evaluated and minimized.
1.1.4 Survey of the Different Methods of Excess Reactivity Compensation
Nuclear Power Plants (NPPs) are typically engineered to operate for years before
requiring refueling [13]. During that period the amount of U235 is gradually depleted as each
fission event removes a fuel element from the core (neglecting the production of Plutonium
and other fissile effects). To combat this burnup effect, a fresh new fuel assembly is loaded
with an excess amount of U235. Without any compensation for this excess U235, a reactor
would go supercritical, requiring some amount of control material to be inserted into the core
to combat the extra reactivity. The amount of control material required to bring the core from
supercritical to critical is dubbed “excess reactivity” [13].
Compensation of excess reactivity is therefore one of the primary concerns for safe
operation of nuclear power plants. Fuel assemblies of typical LWRs contain excess U235 to
facilitate extended core lifetimes [26]. In these LWRs the arrangement of the fuel pins and the
presence of water as a moderator are optimized for criticality. Without any mechanism to
break the neutron chain reaction, these reactor cores would go supercritical.
To compensate for this, LWRs employ three main methods of compensating for this
excess reactivity. The first is the presence of fuel pins that contain strong neutron absorbing
materials instead of fuel. These neutron poisons significantly reduce the thermal neutron
economy when inserted into the core as a function of distance inserted, the absorber material,
and the density of said material. These control rods provide active control of the neutron chain
reaction, as the reactor operators are able to manually adjust the insertion distance.
The second method of excess reactivity compensation involves the presence of strong
neutron absorbing materials mixed into the fuel itself. The amount and resultant density of the
fuel and absorber mixture is carefully engineered beforehand to compensate for an appropriate
amount of excess reactivity. This use of this method employs “burnable poisons,” since these
strong neutron poisons will slowly deplete as more and more neutrons are absorbed and the
poisons are burned up. This effect allows engineers to compensate for the excessive initial
8
reactivity, without significantly influencing core behavior later in life. However, this method
only provides passive control over reactivity. Once the fuel pins are fabricated with the
burnable poisons, they cannot be altered.
The last form of reactivity compensation comes from diluting a strong neutron absorber
within the moderator. In LWRs, all fast neutrons are thermalized within the moderator, and the
presence of a strong neutron absorber within the moderator serves to control the thermal
neutron economy. Typically, concentrations of this soluble-absorber (typically Boron) are in
the order of 800 to 2000 parts-per-million (ppm) [13]. This method allows for active control of
the neutron economy through the presence of a Chemical Volume Control System, which
purges or adds absorbing material in the coolant, among other functions [38].
These three methods of compensation all involve the presence of strong neutron
poisons. However there are different ways to suppress the excess reactivity, but they must be
engineered into core and plant design up front. Since the dynamics of a chain reaction involve
multiple different variables that are functions of one another, the ability to influence some of
these key variables results in an additional method to suppress excess core reactivity.
To demonstrate this effect, it would be a useful exercise to consider what may happen if
all three main methods of compensation were absent. In this scenario, the core would go
supercritical due to the previously mentioned criticality-optimized core environment. Recall
the definition of supercritical is an environment where the number of neutrons increases from
one generation to the next. Since LWRs only contain one dominant neutron source (U235), the
increase in neutrons must come from the fission of U235. These fission events release on
average approximately 200 MeV of energy, with 95% coming in the form of kinetic energy, or
heat [38].
These fission events increase proportionally with the number of thermal neutrons
present, resulting in a rapid increase in temperature within the fuel pins and extending into the
moderator. The rate of increase is governed by the average neutron lifetime, which in LWRs is
on the order of 10-6 sec.
At this point, the heat produced in the fuel pins quickly begins to affect other variables
that influence the neutron chain reaction. Most notable is the moderator temperature, and thus
density. As the temperature rapidly increases, the density of water surrounding the fuel pins
quickly decreases, which in turn results in fewer thermal neutrons due to a decrease in the
number of neutron scattering events within the moderator.
9
This loss of thermal neutrons due to a decrease in moderator density provides a natural
mechanism to combat the fission chain reaction, specifically known as the Moderator
Temperature Coefficient (MTC). Other effects similar to this one comprise additional,
physical methods used to naturally control a runaway chain reaction. But these effects cannot
be actively controlled by reactor operators and must be engineered beforehand, and only effect
operations in accident scenarios. For these reasons, the three main methods of compensating
for excess reactivity are important factors for safe operation of nuclear reactors. Removing
one of the three involves a detailed discussion on the resulting safety and operational impacts.
1.1.4.1 Strengths and weaknesses of the different methods of excess reactivity compensation
Control rods are absolutely essential in any LWR design, due to their ability to provide
active reactivity control. Reactor operators retain the ability to manually and quickly insert
control rods into the core, providing both an effective way to immediately shut the chain
reaction off, and a way to fine-tune the level of reactivity within the core as reactor transients
fluctuate. Typically, the fine tuning ability is left to automated devices, in part since typical
LWR periods (total time required for the reactor to increase by a factor of 𝑒) are too small for
manual human operation [13]. Manual human operation would also be tedious and create
room for mistakes, whereas automated functions provide a higher level of certainty and
reliability. However, in contrast to control rods the other two main methods of reactivity
compensation are even slower.
The devices that physically insert and remove control rods are known as control rod
drive mechanisms (CRDM), and can be prone to operational issues since their presence in a
highly radioactive environment leads to occasional malfunction [26]. In some LWRs, these
CRDMs exist outside the main containment vessel to shield them from these effects, but that
carries a rod ejection risk due to the pressure differential between the inside and outside of
containment [45, 49]. However, these risks are necessary evils since the control rods represent
the only active means of controlling the neutron economy.
Additionally, control rods have a disturbing impact on the neutron flux profile within
the core. Since specific locations in each individual fuel assembly are reserved for control rods
instead of fuel pins, their effect on the neutron economy is localized to that specific area.
Imagine a neutron flux profile in a well-designed LWR as a water bed. Without any objects
10
resting on the bed, the profile would be flat and undisturbed. In this example, control rods are
represented by bowling balls. Toss a few balls onto the bed and the neutron flux profile would
be greatly suppressed in the areas localized to the bowling balls, but also pushed up in the
undisturbed areas. In this respect, control rods create imbalances in the neutron flux, which in
turn creates larger pin-peaking and hot-rod factors.
Furthermore, control rod banks are inserted together at the same axial depth. If control
rods are partially inserted into the core, the absorbing effects will only be axially felt in the
area where control rods are present. The resulting global effect on the neutron flux yields an
axially skewed neutron profile. The neutron flux in the top half of the core would be
suppressed, while the bottom half would be increased. Once again, this axial flux imbalance
creates larger pin-peaking and hot-rod factors.
Mitigating these effects on the neutron flux profile is a motivation for the introduction
of the other two methods of reactivity compensation. However, another motivation arises from
a safety standpoint, where reactor engineers must demonstrate the ability to properly shut
down the reactor in its most reactive state and with the most reactive control rod stuck in a
position withdrawn from the core (the “stuck rod” criteria) [62]. Using only control rods, this
criterion would be difficult to achieve with a fresh core at the beginning of its cycle (BOC),
and at cold, room temperature conditions (since the excess reactivity is greatest with a fresh
core that has not experienced any depletion). In typical LWRs, the amount of excess reactivity
at BOC exceeds the total amount of reactivity compensated by control rods, requiring the
presence of additional compensation methods [26].
Additionally, the regulatory framework within the Nuclear Regulatory Commission
(NRC) requires reactors to meet “defense-in-depth” criteria. For LWRs, this criteria can be
summarized as requiring reactors to possess redundant layers of defense to compensate for
potential human and mechanical failures so that no single layer, no matter how robust, is
exclusively relied upon [65]. These factors necessitate the presence of additional methods of
reactivity compensation.
Burnable poisons function primarily to reduce the initial excess reactivity to more
manageable levels. Since they burn out over time, their effect is only felt from the BOC to the
middle of cycle (MOC), making their presence relatively benign. However, there are a vast
number of factors that engineers must keep in mind when designing a burnable poison
arrangement. The location and total amount of burnable poisons within each fuel assembly
11
should be carefully selected in order to minimize the effect they will have on the neutron flux
distribution, due to their localized effect on the neutron population (similar to control rods).
Additionally, shadowing and shielding effects within poisoned fuel pins will preserve some
U235, leaving a slightly higher and more reactive fuel pin once the poisons have depleted. This
additional reactivity can also carry flux distribution implications.
Finally, soluble boron represents the third part of a diverse, independent and redundant
scheme for reactivity control, and its main advantage lies in the ability to suppress the neutron
population uniformly over the radial and axial profile of the core. If the neutron profile within
a reactor is analogous to a water bed, control rods and burnable poisons could be represented
by bowling balls tossed on to the bed, while soluble-boron is more analogous to a blanket
uniformly depressing the neutron flux everywhere.
This is not a perfect example since its effect is only localized to the moderator, but
since the moderator covers such a large portion of the core, the analogy largely holds. This
allows reactor operators to control the reactivity within the core in a uniform manner, reducing
pin-peaking and hot-rod issues associated with control rods and burnable poisons.
Unfortunately, soluble Boron carries with it a number of issues. First, Boron is
corrosive. Its presence in the core will increase corrosion on the primary loop and the reactor
pressure vessel, and corrosive elements will become mixed in with the moderator [43].
Controlling this requires the presence of a CVCS to clean these corrosive and dislodged
elements from the coolant, and to purify and control the level of Boron diluted in the
moderator. The operation of a CVCS and the presence of corrosive elements in the core add to
the operation and maintenance burden, and the additional piping increases the risk of loss of
coolant accidents (LOCAs) [15, 43].
Soluble boron also introduces an inadvertent boron dilution accident (BDA) risk [15,
16, 42]. While boron is seen to be uniformly mixed into the coolant, there carries a statistically
small chance that one area of the coolant becomes saturated or void of boron. As this section
of coolant passes through the core, the reactor will experience a large insertion of positive or
negative reactivity. As a result, too much positive reactivity will occasionally be added and the
core will automatically be shut down.
Lastly, altering the concentration of Boron can be adjusted for burnup, reactor
dynamics, and even for load-follow operation. However, it is too slow to compensate for
reactor kinetics, but fast enough to control reactor dynamics.
12
1.1.4.2 Burnable poison materials
Large amounts of excess reactivity are undesirable because they require large amounts
of control material to be inserted into the core. With more control material in the core, the
consequences of a rapid removal of control material through either dilution accidents or
control rod ejection become more disastrous, and potentially capable of bringing the reactor to
prompt criticality [13]. As a result, limitations are placed on the amount of reactivity that can
be present in a single control rod and in a bank of control rods [62]. Thus if more reactivity
compensation is required, more control rods and control rod banks must be employed,
increasing the mechanical complexity of the system and occupying additional valuable space
within the core. All of this adds up to an additional economic impact, and should therefore be
avoided if possible.
To avoid excessive use of control rods, reactors today employ both soluble boron and
burnable poisons as additional methods of excess reactivity compensation. In eliminating
soluble boron more dependence is placed on burnable poisons and care should be taken to
select the proper type of poison for use in a small LWR.
There are generally three different types of burnable poisons with their own advantages
and disadvantages: Gadolinia Oxide (Gd2O3), Erbia Oxide (Er2O3), and Integral Fuel Burnable
Poisons (IFBA) [13, 26, 38].
Gadolinia Oxide, comprised of Gd155 and Gd157, is homogeneously mixed with UO2 to
create UO2-Gd2O3, without any alterations to the physical fuel pin dimensions. The amount of
Gd2O3 present in UO2-Gd2O3 fuel pins largely depends on the amount of reactivity
compensation necessary, and thus gives flexibility to the core designer. Gd2O3 also has a
larger absorption cross section for thermal neutrons compared to Er2O3 and IFBAs, which
correlates to a smaller number of pins necessary for excess reactivity compensation.
Furthermore, self-shielding effects in UO2-Gd2O3 pins creates excess U235 at middle of
cycle (MOC) and end of cycle (EOC), usually resulting in a decision to reduce the initial
amount of U235 in UO2-Gd2O3 pins. However, this purposely reduced enrichment (and other
degradation of material properties) creates a slightly lower thermal conductivity. In order to
ensure the maximum fuel temperature design criteria is never exceeded, a further purposeful
reduction of U235 enrichment may be necessary [13, 17, 18].
13
Er2O3 is also a homogeneously mixed burnable poison, similar to Gd2O3. The chief
difference lies in the relatively small absorption cross as a primarily resonance absorber. This
requires a larger number of Er2O3 rods to suppress initial excess reactivity when compared to
Gd2O3. Similar to Gd2O3 is the reduction in thermal conductivity, and self-shielding effects,
which will again produce underburned fuel pins at MOC and EOC, requiring a reduction in
initial enrichment of U235 in UO2-Er2O3 pins.
IFBAs operate on a different design principle, placing a thin layer of Zirconium
Diboride (ZrB2) coating on the fuel pellets. This coating approach results in a longer overall
burnup of fuel assemblies employing IFBAs because there is no fuel reduction displacement
by IFBA pins [26]. As an added benefit, IFBA pins burn out completely when compared to
homogeneously mixed burnable poisons like Gd2O3 and Er2O3 since the coating leaves
essentially no residual absorption penalty. However, a significant drawback arises due to the
neutron-alpha reaction with Boron-10, in which B10 absorbs a neutron and decays via alpha
emission, producing helium. This excess helium can exert additional pressure on the cladding
boundary, and care must be taken to ensure the pressure limits are maintained [26]. This
ultimately results in a global limit on the total IFBA loading amount.
Further burnable poison arrangements include the use of lumped poisons instead of
homogeneous arrangements. The strong self-shielding characteristics of lumped poisons result
in a smooth burnup profile and a longer effective poison lifetime. However, the impact of
discrete pellets is very difficult to model. The use of such lumped poisons represents a
deviation from normal operating PWR fuel assemblies, and will not be explored in this
feasibility study.
1.2 Advantages and Disadvantages to Soluble Boron-Free Operation
Removing soluble boron from normal operations in a prototypical SMR introduces
several inherent benefits, and creates a few key challenges. Before exploring the breadth of
these benefits and issues, a brief survey of the differences between typical LWRs and SMRs is
required.
14
1.2.1 Differences between Small Modular Reactors and Typical Light Water Reactors
Small Modular Reactors represent a different business model than traditional LWRs.
Since the first commercial Nuclear Power Plants (NPPs), reactor designs have steadily grown
larger and larger to take advantage of an economy of scale. Unfortunately, among other things,
the initial investment in both capital and time has grown disproportionately burdensome [45,
50]. The gigantic cost and the inability to determine when a plant would be licensed and built
brought the industry to a point where large NPPs were rarely economically feasible.
While the industry is seeing promising signs of growth, including the recent
certification of the Westinghouse AP1000, the traditional NPP business model carries some
serious roadblocks to long term commercial success [34, 40, 45, 50]. The Small Modular
Reactor (SMR) business model addresses these roadblocks and introduces a new path to
commercialization [34, 40].
The definition of SMRs depends on who you ask. In some contexts, it refers to Small to
Medium Reactors, while in others it signifies a Small Modular Reactor – one that can be built
off-site. Traditionally, the line between SMRs and typical LWRs blurs around the 300-600
MWe range [55]. Most SMRs in design today are less than 300 MWe, which is close to one
third the power output of traditional LWRs [48, 54].
For these SMRs to overcome traditional economies of scale, they employ a few specific
design goals: Create a reactor with far less prohibitive initial investments and a quicker return
on capital; Certify standard designs that could be fabricated off-site and shipped by barge or
train; Employ “Safety-by-Design” to create a passively safe reactor with less operation and
maintenance costs; and employ an economy of multiples instead of an economy of scale [47].
In order to accomplish these goals, a major design simplification must occur. SMRs
adopt standard PWR technology and condense the entire primary loop to a single containment
vessel. The reactor core, control ride drive mechanisms, steam generator, pressurizer, and
reactor coolant pumps are housed in a single cylindrical shell [45]. The only external elements
in some designs include pressurized valves for emergency core cooling system (ECCS)
mechanisms and the secondary loop running from the steam generator to the turbine and
condensers. This simplification makes several of these goals possible. First, the simplified
design will, once certified, enable vendors to certify and construct the reactor itself off-site,
vastly reducing the construction and regulatory burden of typical LWRs. Additionally, the
15
simplified design features several distinct safety advantages that can be engineered to become
passively safe.
First, incorporating all the primary circuit elements into one containment vessel
eliminates the large connecting loop of piping between component pressure vessels and the
steam generators, eliminating LOCAs as design-basis events. Second, integrating the steam
generator inside containment allows for some revolutionary designs that are capable of
accommodating thermal expansion without excessive mechanical stress and with a high
resistance to flow induced vibrations. Third, incorporating the reactor coolant pumps within
containment eliminates the chance of leakage. Fourth, the pressurizer carries a potentially
larger volume-to-power ratio and can potentially eliminate the need for pressurizer sprays.
And finally, inserting the CRDM into the containment vessel eliminates the potential for an
inadvertent rod ejection accident, and reduces the number of penetrations in the vessel head.
Together, these advantages significantly reduce the manufacture and installation costs [45].
This is by no means a comprehensive list of advantages, but the cursory list
demonstrates how a revolutionary simplification can bring several unique safety advantages.
SMRs in design today incorporate a “safety-by-design” approach, where the underlying
principle is that potential accidents should be intrinsically eliminated by design, rather than
coping with their consequences through safety systems. The remaining inescapable accident
scenarios can be dealt with through passive safety systems in part due to the lower power
density and smaller core volume. Designs in certification today boast a much smaller core
damage frequency (CDF) and large early release frequency (LERF), potentially reducing the
off-site emergency planning zone [31, 44, 45, 47].
1.2.2 Advantages of Soluble Boron-Free Operation in Small Modular Reactors
All of the above advantages are accomplished by stringent design simplification. Any
additional piping, pumps, and moving parts carry maintenance and operation implications,
along with additional safety and regulatory hurdles. Returning to the initial discussion on the
advantages and disadvantages of running a soluble boron-free SMR, the biggest advantage is
realized in the elimination of the CVCS and any purification systems from normal operation.
The elimination of this additional piping and of operational oversight bring a significant
economic and safety benefit.
16
While most designs that incorporate soluble-boron free operation still retain boric
solutions in accumulator tanks or other Emergency Core Cooling System (ECCS) functions
[45], their elimination from normal operation still significantly reduces the operations cost.
Consider a scenario where multiple SMR units are bundled together at a single plant with just
a few reactor operators. With each reactor running a different concentration of boron at
different power levels, the potential for confusion appears to be high. Running soluble boronfree will, at the least, allow a smaller team of reactor operators to oversee multiple units safely
and effectively.
Furthermore, the elimination of corrosive effects from boron, and problems linked to
waste removal that have periodically plagued the industry represent another significant
advantage [11, 15]. Corrosive elements that find themselves in the coolant are easily activated
in the high flux environment, and represent an additional dose to reactor personnel that would
be avoided with soluble boron-free operation.
Other advantages are realized in the safety aspects of operation. Boron Dilution
Accidents are completely eliminated and any potential loss of coolant accident will not be
affected by the loss of soluble boron. Removing boron also creates a stronger negative
moderator temperature coefficient due to density differences between pure water and a boricwater solution [43]. In typical LWR operations, the presence of soluble boron is accounted for
in the neutron economy, and the density of a boric-water solution is slightly increased from a
pure water solution. In an accident scenario, the overall density of the moderator is what
drives the negative MTC. By removing boron, the density is automatically reduced, creating a
more negative MTC.
Along the same lines, some typical LWRs have a positive MTC at BOC, owing
partially to a stronger boric solution at BOC. In this scenario, the moderator density at BOC is
too high, creating non ideal conditions for reactivity, where a decrease in density enhances the
thermalizing effect of the moderator. This of course has implications for safety and regulation
that must be sufficiently dealt with, and removing boron completely eliminates this potential.
In sum, the various advantages offered by boron-free operation help create a safer, more
reliable SMR. Eliminating pumps, piping, overpressure transients, boron dilution accidents,
and introducing a safer MTC all carry strong benefits that significantly improve the ability to
create a passively safe reactor [15, 43].
17
1.2.3 Disadvantages to Soluble Boron-Free Operation in Small Modular Reactors
For all its benefits, boron-free operation is not without disadvantages. Removing
soluble boron as one of the three main methods of reactivity compensation fundamentally
changes normal operating procedure. Typical LWRs use soluble boron to reduce the excess
reactivity to levels manageable through limited control rod involvement. So while all reactors
employ control rods to handle daily reactor kinetics, soluble-boron allows these control rod
movements to be limited to the very top portion of the reactor. In this manner, the neutron flux
profile is minimally affected, and does not produce an undesirable axial power profile.
Without soluble boron, control rods must compensate for any excess reactivity left
from the burnable poisons. This requires their direct and significant involvement in daily
operations, where the active control rod bank at BOC is almost completely inserted, and is
slowly withdrawn as the core depletes. This effect creates a skewed axial power profile for the
lifetime of the core. Left unaddressed, this will create adverse pin-peaking factors and
ultimately lower the reactor's operating margin [24, 37].
It must be noted that the overall impact of peaking factors can be reduced by lowering
the overall power density of the core, and suggests that smaller reactors stand to benefit more
from boron-free operation since they are better suited for small power densities that blunt the
impact any adverse axial power profile may have.
Nevertheless, significant engineering effort must be given to maintain a proper axial
power profile. While there a few useful techniques to achieve this, it is still a cost-intensive
exercise and leaves less control for operators to use in normal operations.
The most obvious solution to the axial power profile issue is to attempt to mimic the
effect of soluble-boron on the neutron flux. That is to say, design the discrete neutron poisons
in such a manner as to mimic the effect of a unified neutron absorber. In this manner, the
overall axial and radial flux profile over the life of the core will remain as smooth as possible
and thereby minimize any pin-peaking issues. With only burnable poisons and control rods as
viable methods to control excess reactivity, there are four main techniques that can be used to
accomplish this.
First, any burnable absorber arrangement can be axially graded. Higher enriched
Gd2O3 at the bottom of the fuel pins, in the areas that will first be exposed to higher neutron
flux concentrations, can blunt the effect of control rod movement. Second, separating the
18
active control rods into two or more control rod banks that operate at different depths can
serve to offer a step reduction in reactivity compensation, instead of the sudden cliff between
axially rodded and unrodded locations. If different control rod materials are used for the
different banks, a further step reduction can be achieved. Third, lowering the enriched U235 in
the fuel pins that contain burnable poisons will compensate for any shadowing and shielding
effects. Finally, axially grading the enrichment of U235 for entire fuel assemblies can adjust the
amount of reactivity present at desired locations.
One technique by itself might not be enough to completely overcome the axial power
profile issue, but employing all four in conjunction could potentially create a suitable axial
power profile throughout the lifetime of the core. The difficulty arises by the fact that none of
these methods are independent variables. Their effect on the axial neutron flux profile will
also affect the impact of other techniques on the flux profile. Any single manipulation of the
neutron flux will ultimately change the effectiveness and overall impact of other methods of
controlling the neutron flux. Thus, any optimization study would be exceedingly difficult.
Other disadvantages to soluble boron-free operation carry safety implications. Any
rod ejection, rod withdrawal, or stuck rod event can be much more severe due to the additional
control rod worth [26, 43]. Furthermore, any refueling activity must be carefully analyzed due
to increased criticality concerns. Without soluble boron, depleted fuel assemblies in cold zero
power conditions carry a much lower criticality margin. Adding soluble boron for these
activities might be prudent.
Finally, because control rods are a discrete rather than uniform absorber, any
shadowing effects caused by the insertion or removal of control rods will have a greater
propensity to induce xenon oscillations. Since boron-free cores use active control rods, care
must be taken to prevent these events.
Overall, the removal of soluble boron carries significant advantages toward the safety
and reliability of reactor operations. But its removal also brings distinct challenges, most
notably in controlling the axial power profile. A complete discussion on the exact nature of
these challenges will be provided later, along with an examination of potential strategies that
could mitigate the challenges.
19
Chapter 2 – Literature Review
2.1 Survey of Current SMR Designs
This thesis concerns soluble-boron free operation in Small Modular Reactors. The
state of the industry today involves several competing designs, some of which employ boronfree operation. The motivations for moving to boron-free have been previously discussed, and
this thesis aims to further inform any decision to move to soluble-boron free based specifically
on core size and power density. With this in mind, a brief survey of the three main SMRs
being designed in the United States is in order.
2.1.1 Babcock and Wilcox mPower
The Babcock and Wilcox (B&W) mPower reactor design [21] is a passively safe
advanced light water reactor with a below-ground containment structure. Employing a
competitive approach to plant operations that emphasizes safety, the mPower reactor will be a
180 MWe reactor with a passive safety that eliminates emergency power requirements,
incorporates a 4-year core lifetime with standard U235 fuel, and a 60-year plant lifetime with
spent fuel storage on-site.
The mPower reactor is a descendant of the B&W maritime reactor program, notably
incorporating four key features of the nuclear-powered merchant ship Otto Hahn:
incorporating all NSSS components within a single vessel, use of an integral, once-through
steam generator, use of PWR-type fuel assemblies, and boron-free reactor coolant. The
mPower design also improves upon the Otto Hahn design by introducing a higher reactor
power and an improved efficiency, placing control rod drive mechanisms within the single
containment vessel, and incorporating passive safety systems [21].
Notable features of the core design include a 48-month operating cycle at 95%
capacity with shorter versions of standard commercial 17 x 17 PWR fuel assemblies in a
closely packed square-pitch lattice. A significantly reduced average linear power density
(compared to commercial PWRs) results in improved thermal margins, increased operational
flexibility and longer fuel cycles. The non-borated coolant necessitates use of several different
control rod banks which control excess reactivity and axial power shape. Several reactor
20
coolant pumps supply forced convection through the primary circuit, with a standard
electrically-heated pressurizer above the steam generator.
Notable differences in mPower’s design compared to NuScale and Westinghouse
designs include the use of boron-free coolant, a below-ground containment structure, 69
assemblies for 180 MWe operation, and a 4-year core lifetime with no refueling. Most other
aspects are largely similar in design, with an integral containment vessel that allows for typical
SMR advantages like advanced passive safety features and modular, scalable designs.
While B&W is designed for boron-free operation, information pertaining to the
operation and effectiveness of their boron-free reactor is strictly proprietary. The only public
knowledge of their current design is simply that it is boron-free, but nothing further can be
said of the strategies and designs used to create a suitable boron-free reactor.
2.1.2 NuScale Power SMR
The NuScale Plant represents an innovative approach to SMR design by introducing a
scalable plant comprised of up to 12 factory-fabricated 45 MWe power modules. Each module
consists of an integrated PWR surrounded by a second, high strength containment vessel. Each
vessel shares a common concrete pool that resides underground, housed in a seismic category
I building, which provides 30 days of passive core and containment cooling. After 30 days, the
core decay heat generation is small enough for natural convection heat transfer to provide
sufficient cooling for an unlimited period [31].
This unique design represents superior passive safety, providing decay heat removal for
an indefinite period of time without the need for external power or water. Owing to each
module’s 45 MWe power output, a smaller integrated PWR vessel with a core comprised of
37 half-height standard 17 x 17 assemblies operates on natural convection, further eliminating
the need for external power. A helicoil steam generator optimized for natural circulation
provides heat removal from the primary cicuit, and an integral pressurizer with heating
elements and a spray system maintains the pressure at 1850 psia. Each module operates on a
2-year refueling cycle.
The smaller core with a relatively lower power density and flow rate make NuScale
stand out from B&W and Westinghouse. The use of a common pool and a scalable plant
21
further distinguished their design. However at present their design incorporates soluble boron
as a primary method of excess reactivity compensation.
2.1.3 Westinghouse SMR
Westinghouse’s Small Modular Reactor incorporates proven design technologies
realized in the AP1000 plant to create a passively safe integral pressurized water reactor.
Similar to B&W and NuScale, the integral reactor containment sits below grade and houses all
elements of the primary loop, including a once-through steam generator and integral
pressurizer. The reactor is designed for >225 MWe operation by incorporating 89 robust 17 x
17 8.0 ft active height PWR fuel assemblies. This larger size sets the Westinghouse design
apart from both B&W and NuScale, offering the greatest energy output with a 2 year refueling
cycle.
Westinghouse’s proven ability to design, license and deploy reactors and the
experience gained through the design and certification of the AP1000 plant lends credibility to
their SMR design. Some of these AP1000 features enable a passively safe design that allows
for 7 days of passive core heat removal before human intervention would be required. This
exceeds the current NRC regulations requiring 72 hours of passive safety, but falls short of
both B&W and NuScale, owing to the larger core and greater power output. This larger design
necessitates extra complexity in plant operation and safety systems, and reflected in this is the
use of borated coolant through the primary loop.
Of specific concern for this thesis the core size and power density of each design. As
B&W, with a moderate size and power density being the only design that has pursued boronfree operation, perhaps other larger or smaller designs would be well suited to revisit a boronfree approach. Nevertheless this thesis employs a SMR design with a power density roughly in
the middle of these three designs in an effort to provide research on a typical, universal SMR
design.
22
2.2 Relevant Soluble Boron-Free Research and Development
While some current SMR designs employ a boron-free core design, the information
related to their specific design and operation are kept strictly proprietary. There are very few
publicly available research papers and relevant reactor designs on soluble boron-free
operations in LWRs. Nevertheless, a handful of notable and significant papers and their
contributions to boron-free research are outlined and discussed below.
2.2.1 Feasibility Studies of a Soluble Boron-Free 900-MWe PWR
In 1999 the French Commissariat a l’Energie Atomique conducted a feasibility study on
an Advanced 900-MWe PWR aiming at the partial or total elimination of soluble boron during
normal operations [12, 15, 37]. Their study comprised three parts: consequences of the partial
or total elimination of soluble boron on plant safety; core physics including assembly design
and core control; and core physics including control rod follow and load following. Their
motivations for the study involve several factors previously discussed in the introduction, with
a specific eye on two main objectives: the improved safety taking into account the principle of
defense in depth, and an increased simplification in the design and control.
The first part concerns the safety systems and the consequences of eliminating or
reducing soluble boron. The implications linked to the use of soluble boron in the coolant are
described, as well as the consequences for the reactor in terms of demands for reactivity
control reinforcement and for the need for defense-in-depth requirements [15]. As described,
the greater the elimination of soluble boron, the greater the simplifications. All this makes
operation easier (reduction or elimination of maintenance), reduces the doses received by
maintenance staff (less piping in contact with coolant), simplifies accident transients, reduces
the risk of human errors, and reduces maintenance costs.
The second part details the various neutronic consequences of eliminating boron,
including increased dependence on neutron poisons, moderation ratio, and cluster systems for
control rods [37]. A specific assembly geometry is optimized by taking these consequences
into account, where it was found that a 19x19 assembly lattice with 36 poisoned rods could
sufficiently suppress excess reactivity. Gd2O3 was selected due to its strong absorption
characteristics, with 16 rods at 5% and 20 rods at 14%. Selecting such a high loading
percentage for Gd2O3 introduces a longer burnup period for Gd2O3 and stronger self-shielding
23
characteristic, at the expense of slightly higher peaking values. Careful selection of the loading
geometry optimized the assembly’s power peaking factors, maintaining a satisfactory value of
1.16 at the beginning of cycle and 1.07 at the end of cycle. During the core design, further care
was taken to select a proper loading pattern for a three-batch refueling scheme, and to
optimize the Rod Control Cluster (RCC) arrangement.
Several important design modifications arose as part of this first core physics study: A
19x19 lattice was designed to accept an increased number of absorber rods, and to increase the
moderator-to-fuel ratio. Further axial zoning of the burnable poisons improved the axial power
profile, and multiple control rod banks provide sufficient reactivity to ensure hot and cold
shutdown.
The last core physics study addressed control algorithms to define control rod
movements so as to minimize the imposed power peaks at each instant [12]. These peaks are
the inevitable result of primarily compensating for excess reactivity through control rods.
Further optimization of the axially graded burnable poison profile, along with introducing
both grey and black control rod clusters, allowed for a smoother power profile over the whole
cycle. These specific strategies mirror what was discussed earlier in this study. Additionally,
such a dependence on control rods increases the consequences of reactivity-induced accidents
linked to accidental removal of rod clusters and necessitated further study on the associated
safety implications.
Final conclusions determined that soluble-boron free operation in a 900-MWe PWR
significantly simplified the core control and improved operational flexibility. However,
soluble-boron free operation creates a specific difficulty in properly controlling the power
distribution at the end of cycle and during load follow operations [12].
Since the Commissariat a l’Energie Atomique directed their study on the effects of
removing soluble boron on a large 900-MWe reactor, their findings were concerned with all
aspects of operation. SMRs reduce and simplify the traditional PWR layout to a single
containment, creating several distinct differences that in turn impact the benefits and
advantages to removing soluble boron. With this in mind, much of work performed by the
Commissariat does not translate directly to SMRs. While many of their operating
characteristics – like an increased dependence on burnable poisons and additional control rods
with multiple banks – will be employed and expanded in this thesis, other aspects will be of no
concern due to this distinct difference between traditional PWRs and SMRs.
24
2.2.2 Elimination of Soluble-Boron for a New PWR Design
The Combustion Engineering study on soluble-boron free feasibility [43] was
motivated by two main factors: the corrosion effects from boric acid, and the large
contribution on the effluent volume. With these two objectives in mind, the methodology
employed four steps: identification of the needs for reactivity control, lattice effects, new
poisons and increased use of burnable poisons, and safety and economic analysis within an 18
month cycle.
Their results covered soluble-boron free operation with commonly used technologies
and standard lattices and poisons, while doubling the current number of control rods compared
to standard PWRs. They also found improved performance in terms of safety and an
equivalent cost when optimization is performed. However soluble boron free operation was
attained at the cost of restrictions on the cycle length and on the operating margin due to
peaking factors.
In the end, EPRI concluded that eliminating soluble boron would allow for a greater
simplification in control and maintenance through the elimination of pipes and circuits and to
reducing several waste management activities. Finally, removing the corrosion effects and
eliminating problems linked to overpressure transients are reflected in safety improvements.
Their conclusions found that the few drawbacks linked to boron-free operation can be reduced
through optimization and are less restrictive for smaller PWRs. They additionally concluded
that the advantages are particularly beneficial for passive small and medium reactors [43].
Where the EPRI study ends is where this study begins. They perform their analysis
with respect to traditional LWRs, but find smaller designs might be better suited for soluble
boron-free operation. Many of their findings are reiterated in the advantages and
disadvantages outlined earlier, but unfortunately the combustion engineering study does not
contribute significantly to specific strategies for overcoming difficulties in operations.
2.2.3 A Soluble Boron-Free Core Design for the IRIS-50
The IRIS-50 was a prototypical design under development by Westinghouse as a 50
MWe integral PWR, based on the well-known 335 MWe IRIS design [16]. The larger 335
MWe IRIS design incorporates soluble boron in the coolant, in large part because additional
control rod requirements would become economically burdensome [7]. However in smaller
25
designs like that of the IRIS-50 a soluble-boron free design could become economical. This
study shows that control rod banks can be effectively used as an alternative to soluble boron
for both long term and short term reactivity compensation in all plant operating conditions.
Main features of the IRIS-50 include 37 fuel assemblies with a single batch, zoned fuel
management arrangement. The IRIS-50 incorporates the use of 6.0 ft standard 17 x 17
Westinghouse PWR fuel assemblies with UO2 fuel for a 4 year cycle length. Er2O3 acts as an
integral burnable absorber for further reactivity compensation [16]. The smaller core leads to
an increase in neutron leakage, and therefore a less reactive configuration. However, this also
introduces tighter coupling of the core, reducing the impact of localized events like control rod
insertion. This adds to the viability of soluble boron-free operation due to an increased
dependence on control rods.
To demonstrate that control rod banks can be effectively used as an alternative to
soluble boron, multiple control rod banks are selected for different purposes. Four banks of
rodded assemblies function as primary reactivity control banks. A separate bank exists
independently and functions to balance the axial power distribution. Two further banks
provide shutdown margin for hot and cold conditions.
The Four primary reactivity control rod banks are moved to compensate for reactor
kinetics and to maintain criticality. Two insertion patterns for the different banks are proposed
to ensure that different depths of insertion for each bank effectively balance any shadowing
and shielding effects from protracted insertion of a control rod in a given fuel assembly. As
the fuel is depleted, the two configurations are periodically alternated. Further optimization
incorporates the axial offset bank to counterbalance the effect on axial power of the partial
insertion of the primary reactivity control rod banks [16].
Altogether, a functional scheme for reactivity compensation in a small PWR is
proposed and analyzed. The results demonstrate a 4-year effective cycle length that possesses
higher relative power peaks that are still within all design limits. Further optimization of fuel
loading patter and control rod design is expected to further reduce the associated power peaks.
While this IRIS-50 design did not explicitly incorporate advanced burnable poison
schemes, the selection of multiple control rod banks demonstrates the feasibility of depending
heavily on control rods to compensate for excess reactivity. It is important to note that the
IRIS-50 control rod algorithm incorporated multiple banks that are each partially inserted in
the core. Unfortunately, complete information on the axial power profile, the neutronic
26
characteristics, peaking factors, and other relevant operational data is kept proprietary. While
this thesis will adopt general strategies outlined in the IRIS-50 design, the lack of complete
core data necessitates starting from scratch and building an independent strategy for soluble
boron-free operation.
2.2.4 Nuclear and Thermal Hydraulic Design Characteristics of the SMART Core
The System-integrated Modular Advanced ReacTor (SMART) is a 330 MWth SMR in
development through the Korea Atomic Energy Research Institute (KAERI). Since its
inception in the early 2000s up to today, the design has undergone significant modifications
[1, 2, 23, 48], with early designs incorporating soluble boron-free operation. The details on the
proposed soluble boron-free operation are provided in a 2003 paper on SMART’s nuclear and
thermal hydraulic design characteristics [8].
The SMART reactor employs 57 fuel assemblies in a circular array with 17x17 fuel
assembly geometry. Fuel rods employ UO2 with 4.95% U235 for a 3-year operation cycle, with
a 2 meter active core height. Burnable poisons and control rods are used to compensate for
excess reactivity, with 49 total control rod elements present in the core. These 49 control rod
elements are also capable of maintaining a subcritical condition at 20ºC without soluble boron.
The strategy for soluble boron-free operation utilizes a combination of burnable poisons
and control rod banks. With regard to burnable poisons, three main fuel assembly types are
employed, each with different burnable poison characteristics. Specifically, one fuel assembly
type consists of 28 Al2O3-B4C shim rods, and 12 Gd2O3 poisoned rods. A second type contains
20 Al2O3-B4C shim rods and 4 Gd2O3 poisoned rods, and a third type contains 24 Al2O3-B4C
shim rods and 4 Gd2O3 poisoned rods. These three different fuel assemblies provide different
depletion profiles, and since neutron fluxes are higher in the core central region than in the
outer peripheral region, fuel assemblies with more poisons are placed in the central region of
the core. Further axial grading is also employed to compensate for control rod insertion [8],
although no detail is provided on the exact nature of the axial loading.
Control rod banks employ Ag-In-Cd and are grouped into 4 regulating banks and 2
startup banks. The startup banks are at the fully withdrawn position during power operation,
whereas the regulating banks are used in normal operation to control core excess reactivity.
The 49 control rod banks are capable of controlling core excess reactivity at all operating
27
conditions [8]. Furthermore, the critical rod position of each of the 4 regulating banks during
normal operation is designed with a staggered profile. One critical rod bank is inserted far into
the core, while another is inserted slightly less. This staggered insertion limits the impact on
the axial power profile.
The critical rod position for all regulating banks does not change much during the cycle
because the core excess reactivity does not change much as a result of the careful selection
and distribution of the fuel assembly types. This relatively constant control rod position is
important for ensuring shutdown margin and power distribution control [8]. The results
obtained from the above strategies produced an axial offset between -0.20 and 0 throughout
the entire cycle, and a maximum power peaking factor of 2.05.
The strategies employed by the SMART design are similar to the strategies that are
employed in this study. The results obtained from SMART show significant promise for
acceptable soluble boron-free operation. However, once again detailed information on the
exact axial loading of burnable poisons and on control rod insertion behavior is not provided.
Information on the weight percent of B4C in the shim rods and Gd2O3 in the poisoned rods is
also not provided.
Furthermore, the SMART design employs Al2O3-B4C shim rods in addition to Gd2O3
poisoned rods. This study does not employ Al2O3-B4C shim rods in an attempt to produce
soluble boron-free operation through industry standard fuel assembly designs. Specifically,
through fuel assemblies with only UO2 fuel rods and Gd2O3 poisoned rods. It should also be
noted that each Al2O3-B4C shim rod used in the SMART design essentially creates a fully
inserted control rod with limited self-shielding characteristics. This study instead employs a
control rod algorithm that places fully inserted banks into the core for extended periods of
time.
28
Chapter 3 - Methodology
3.1 Definition of research goals
SMR design incorporates several fundamental design changes. Most notably, the design
simplification into a single containment vessel and the reduced size associated with modular
designs. These simplifications bring some inherent advantages if soluble boron is removed in
normal operations. However, removing soluble boron also introduces significant
complications. Thus, this study arises from a desire to remove soluble boron in normal
operations for a prototypical SMR.
The purpose of this study is twofold: 1) Identify a soluble boron-free SMR design that
meets design requirements (to be listed below); and 2) To examine the fundamental
differences in operations with and without soluble boron in an SMR.
With respect to the first purpose, different strategies for operating boron-free will be
explored. If a core is found to meet the design requirements, no further improvements will be
attempted, since the fundamental goal of this study is to demonstrate the feasibility of boronfree operation. In this respect, this study will not seek to define or establish an ideal core.
The second purpose of the study involves comparing the behavior of an SMR with and
without soluble boron. Key aspects include the neutron multiplication factor without leakage
effects (kinf) vs burnup, fuel depletion and plutonium production, neutron flux and energy
spectra, effective fraction of delayed neutrons, and reactivity effects (moderator and fuel
coefficients). These aspects will be examined on an infinite-lattice level as a means of
comparing the physical effects of removing boron.
3.2 Criteria for Success
Removing soluble boron places increased dependence on control rods and burnable
poisons, and requires control rods to be actively inserted in the core to maintain criticality.
This principle difference in operations directly impacts the axial power profile. In an ideal
PWR, the axial power profile will resemble a chopped cosine, with a natural peak in power at
the midplane [13]. Since a chopped cosine naturally limits any spikes or significant peaks in
power output, any deviation from this normal chopped cosine contains the potential for these
peaks, and the resultant peak will have a direct impact on peaking factors within the core.
29
For this reason, the primary factor of concern in developing a soluble boron-free SMR
revolves around the maximum peaking factor throughout depletion. Of similar interest will be
the axial power profile throughout depletion, since this profile will provide insight on the
peaking factors. Strategies designed to contain the axial power profile should also be helpful
in containing the maximum peaking factors.
However, even if maximum peaking factors are at an acceptable level, a skewed axial
power profile is still less than ideal. A consistently skewed profile will result in uneven
exposure axially throughout the core, along with further complications. A power profile with a
peak that deviates from the center of the core also results in a neutron flux profile that deviates
from the center. This shifting neutron flux profile will primarily impact exposure, where
locations that experience high flux will deplete quicker. This uneven exposure throughout the
core will ultimately shorten core lifetime, representing an inefficient use of fuel in the core.
Beyond impacts on exposure, a skewed axial power profile will also produce shifting
samarium and xenon poisoning concentrations. The effect these poisons have on operation
could further complicate the axial power profile and exacerbate attempts to contain the power
profile. In the end, designing a SMR that possess a skewed axial power profile is less than
ideal.
3.2.1 Criteria for Axial Offset
As discussed above, the axial power profile in an ideal core with soluble boron closely
resembles a chopped cosine, where the core possesses inherent symmetry. The amount of
power produced above the core centerline is balanced by that produced below the core
centerline, with a natural peak occurring at the center. In order to quantify how close a core’s
power profile is from this ideal chopped cosine, a metric known as the axial “offset” is used
[26]. In general, a positive value indicates a power profile that is skewed toward the top of the
core where more power is produced above the centerline than below the centerline.
Conversely, a negative value indicates more power produced below the core centerline. An
axial offset of 0 indicates a perfect balance between power produced above centerline vs
below.
To determine the exact value of the axial offset, consider the axial power profile in
Figure 1. While the power profile still clearly resembles a chopped cosine, it has been shifted
30
toward the bottom of the core. To calculate the axial offset value for this core, the normalized
amount of power produced in each node throughout the core is first calculated, represented by
the blue line. These values are produced by taking the averaged power level in each node and
dividing it by 25, the total number of axial nodes in the core [59]. This produces a total
percentage of power produced in each node. Then, the sum of these normalized amounts of
power is taken for all the axial nodes both above centerline and then again below centerline.
For this example, the nodes above centerline produced 18% of the total power, while the
nodes below centerline produced 82%.
Axial Node
21
Normalized Power
Averaged Power
16
11
6
1
0
0.5
1
1.5
2
2.5
3
Normalized Power Level
Figure 1: Axial power profile of a hypothetical boron-free reactor core.
Therefore, the reported axial offset value is the difference between the total average
power produced above centerline and below centerline. In this example, the reported axial
offset would be 0.18 – 0.82 = -0.64. In this manner, the total range of axial offset values can
vary between 1 and -1. A high positive value does not necessarily equate to the locus of power
being produced at the very top of the core, just that the majority of power is being produced
somewhere throughout the top of the core. In other words, the difference between the integral
31
of power produced above centerline and below centerline is what constitutes the value of the
axial offset.
To demonstrate this, Figure 2 shows two different axial flux profiles that both result in a
very similar axial offset value. The blue line contains an axial flux profile that more
dramatically deviates from the ideal chopped cosine, with peak power production occurring
very close to the bottom of the core.
25
Axial Offset = -0.60
Axial Node
20
Axial Offset = -0.64
15
10
5
0
0
0.5
1
1.5
2
2.5
3
Normalized Power Level
Figure 2: Averaged axial power profile of two hypothetical boron-free cores vs core height
(axial node).
While the two axial offset values are very similar, the axial power profile associated
with the -0.6 axial offset produces a maximum peaking factor much higher (5.40) than the
profile associated with the -0.64 axial offset (3.34). This is due to the higher maximum
average power level (at around node 8) of 2.75, whereas the blue line produces a peak (around
node 4) of only 2.1. The important point is to remember that the reported axial offset value is
derived from a measurement of the total amount of power produced above and below core
centerline. It does not paint a definitive picture of what the actual axial power profile is, which
will more accurately correlate to high or low peaking factors.
32
However, since the shape of the axial flux profile will change dramatically throughout
burnup for a soluble boron-free core, the best simple representation of the axial power profile
is the axial offset value. For this reason, graphs of the axial offset value vs burnup will be used
to determine the behavior of the axial power profile throughout the lifetime of the core. But it
is important to keep in mind that it is not the axial offset itself that directly correlates to
peaking factors, but rather the shape of the actual axial power profile.
With this in mind, a successful soluble boron-free SMR will maintain the axial offset
throughout burnup at ±0.4. This band would ensure that no more than 60% of the total core
power is produced either above or below the core centerline, and would therefore represent a
largely uniform axial power profile.
3.2.2 Criteria for Maximum Pin Peaking Factors
Thermal hydraulic disciplines in nuclear engineering revolve around one critically
important factor: The reactor cannot be subject to any condition that would result in meltdown
[13, 26, 62]. Among several other potential issues, fuel failure would result hydrogen
production in the cladding, increasing the potential for hydrogen explosions within
containment and greatly increasing the risk of fission product release. Fuel melting would also
only occur in scenarios with limited heat transfer, and the resultant liquid fuel would burn
through containment and cause significant environmental damage [26].
As such, this simple requirement is of critical importance, and it carries several
implications. In order to ensure there is no fuel failure in PWRs, the NRC has identified that
the average clad temperature during any postulated accident scenario cannot exceed 2000ºF
[62]. This prevents cladding failure and the subsequent fuel melt. In order to maintain this
requirement, the NRC further requires the surface heat flux for fuel pins during any postulated
accident scenario does not fall below a specific ratio known at the Minimum Departure from
Nucleate Boiling Ratio (MDNBR) [26, 62].
The MDNBR is a ratio that defines a critical heat flux as the heat flux at which
cladding failure is likely to occur [26]. It is given as follows:
𝑀𝐷𝑁𝐵𝑅 =
′′
𝑞𝑐𝑟𝑖𝑡
𝑞 ′′ · 𝑓
33
Where 𝑞 ′′ represents the local maximum heat flux in a reactor core, and 𝑓 represents
engineering uncertainties. Generally, the engineering uncertainties are owed to both
overpower factors (the possibility of the reactor core operating or subject to power levels
above its rated level) and a general engineering uncertainty factor (uncertainties involved with
modeling and analyzing reactor behavior). Together, a total overpower factor of 1.05 and an
engineering uncertainty factor of 1.15 is sufficient for the purposes of this thesis [26].
The specific requirements enforce a MDNBR > 1.3 for all postulated reactor
conditions. Owing to this, thermal hydraulic demands on reactor engineers revolve around
maintaining 𝑞 ′′ under a specific value at which the MDNBR will be compromised.
To accomplish this, the only factor of concern would be the local maximum heat flux.
Wherever the heat flux is greatest throughout the reactor’s entire lifetime would be the heat
flux used in the MDNBR calculation. Thus, avoiding any significant spikes in power
production is critical, and sheds further light on why maintaining a proper axial power offset
(Section 3.2.1) is important. However, the axial power profile is not the specific item of
concern. Rather, the only item of concern in relation to the MDNBR is the specific maximum
pin peaking factor.
This maximum pin peaking factor occurs at the fuel pin where the heat flux is at a
maximum for the entire core. The value of the pin peaking factors are normalized to one,
therefore the value of the maximum pin peaking factor represents how far above average that
pin’s heat flux is [13, 26].
Subsequently, tracking the value of the maximum peaking factor throughout burnup
gives a quantifiable metric by which power spikes can be measured. However, requiring a
specific maximum pin peaking factor to remain below a certain level does not certify that
MDNBR limits are kept. The only value that certified MDNBR limits are kept is the specific
heat flux within the maximum fuel pin (𝑞 ′′ ). Therefore, the limits imposed on maximum pin
peaking factors will follow engineering judgment. Any final design must incorporate a
specific examination on the actual maximum heat flux inherent to that design.
Nevertheless, using engineering judgment, a pin peaking factor above a certain value
that is likely to result in a MDNBR that has been exceeded can be identified. To examine this,
′′
. Several methods have been postulated since the physics behind
first we must determine 𝑞𝑐𝑟𝑖𝑡
two phase flow is exceedingly complicated [19, 20, 26]. As such, an empirical solution has not
been identified, and experimental approximations are instead employed.
34
The selected method employs Groeneveld’s critical heat flux tables [20]. Using only
reactor pressure, mass flux, and thermodynamic quality, values for the critical heat flux in
8mm cylindrical tubes is estimated. Since these values are known, the Groenveld lookup
′′
tables will be employed at a final determination on the value of 𝑞𝑐𝑟𝑖𝑡
.
By employing conservatism, the as yet unknown thermodynamic quality can be set to
′′
value of 3335 kW/m2 is identified. Using this value, and
-0.15 (subcooled liquid), and a 𝑞𝑐𝑟𝑖𝑡
the above engineering uncertainties results in a total calculation of:
3335 𝐾𝑊/𝑚2 · 1.05 · 1.15 2762 𝐾𝑊/𝑚2
=
𝑀𝐷𝑁𝐵𝑅 =
𝑞 ′′
𝑞 ′′
Following this equation, a value of 𝑞′′ that exceeds 1973 KW/m2 will result in a
MDNBR that is below 1.4. This value will be used as the MDNBR heat flux criteria that must
not be exceeded at any point of operation.
Furthermore, from a plot of several data points correlating the maximum pin peaking
factor to the associated power density gives a general pin peaking factor of 4.2 that is likely to
result in a value of 𝑞′′ that exceeds 1973 KW/m2. Although this number was found through
correlations and engineering judgment, and will therefore be used as a guideline and not a
deterministic limit.
2.3 Available Tools for Reactor Design and Analysis
The regulatory structure of the nuclear industry requires any design and analysis of
nuclear reactors to be performed on qualified computational software [26, 62]. This feasibility
study will require analysis of lattice calculations to model the behavior of fuel assemblies with
and without soluble boron. These fuel assemblies and the appropriate cross sectional data will
further need to be packaged into full-core geometry and model the depletion of a full-scale
SMR. The software should be flexible and powerful enough to accurately simulate the
complex behavior of nuclear reactors, and must be an industry recognized standard and
verified for reactor analysis.
While there are several options available, Oregon State University provided access to
Studsvik Scandpower’s suite of neutronic codes. Their code held unique advantages through
35
the ability to model all aspects of reactor design, from pin-cell calculations and infinite lattice
studies, to 3-D full core depletion and analysis. Further benefits include the ability to couple
other industry standard thermal hydraulic codes like RELAP5 for detailed analysis of the
entire primary circuit. While this study does not incorporate thermal hydraulic calculations,
future work may incorporate a complete analysis of the primary circuit, in which case
selection of a code that easily couples with thermal hydraulic codes is beneficial.
Studsvik’s codes are widely recognized as an industry standard, being used by utilities,
vendors, research labs, and universities in the United States and worldwide [35, 55, 59]. For
the above reasons, this code was selected for use in this study to analyze boron-free behavior
in a SMR. The specific codes utilized were CASMO – 4E and SIMULATE 3K.
CASMO – 4E is a 2-D multigroup transport theory code for calculation over the entire
burnup of LWR fuel in typical fuel assembly geometries or simple pin cells. The primary
function of CASMO is to provide neutronic and cross sectional data for cylindrical fuel rods in
a square pitch array [55]. The code contains the ability to include typical burnable poisons
homogeneously mixed in the fuel pin, which is a crucial requirement for the study at hand.
CASMO can also take spacer grids, instrument tubes, water channels, and other typical reactor
configuration.
At its core, CASMO solves the 2-D neutron transport equation for use with LWR fuel,
with the provided data simulating neutronic behavior throughout the whole exposure cycle. A
nuclear data library with 70 energy groups is coupled with the geometrical and physical
properties supplied in the input file to generate macroscopic cross sections. Resonance
integrals are approximated using an equivalence theorem and used to calculate effective
absorption and fission cross sections. Shielding and shadowing effects present with fuel and
control pins are calculated using Dancoff factors [35, 55].
CASMO also retains the ability to generate cross sectional and neutronic data suitable
for 3-D nodal codes (SIMULATE) at several possible state points. This data and the
associated cross sections are then bundled in appropriate libraries for use with SIMULATE.
Additionally, several functions are automatically performed (thermal expansion of densities
and dimensions) or have set default values for typical fuel and geometric parameters. The
Linux based code was written exclusively in Fortran 77 and runs on UNIX and Linux
workstations, along with P.C.’s.
36
While CASMO will be used for 2-D lattice analysis and fuel assembly preparation,
SIMULATE 3K will be used for 3-D full core analysis. SIMULATE 3K is an advanced code
for the analysis of LWRs, specifically BWRs and PWRs. It employs a 2-group nodal code
based on the QPANDA neutronics model, in which a 4th order polynomial is used to represent
both thermal and fast flux distributions [35, 59].
At its core, SIMULATE performs pin power reconstruction and can be employed to
analyze fuel management, load follow, xenon and samarium transients, startup predictions,
criticality searches, and several other reactor analysis data. It is a flexible and strong code
capable of simulating the complex physical effects typical of LWRs [98]. Due to its position
as an industry standard code and the qualification process inherent to its approval from the
NRC for reactor analysis, no validation study will be performed.
37
Chapter 4 – Reactor Design and Analysis
Owing to the organizational structure of this study, the methodology and analysis is split
into five main sections.
•
First, an overview of the selected SMR design
•
Second, a study on five key physical effects of soluble boron-free operation in a 2-D
infinite lattice.
•
Third, development and analysis of several fuel assemblies with different neutronic
and depletion characteristics in preparation for a soluble boron-free full core design.
•
Fourth, a description and analysis of different strategies for containing pin peaking
factors and axial offset in a soluble boron-free reactor core through axially grading
both burnable poisons and U235 enrichment.
In this manner, a foundation will be laid upon which the results from these different
strategies of soluble boron-free operation can be analyzed. Chapter 5 will therefore discuss
and analyze the actual results from implementing these different strategies.
4.1 The Selected SMR Design with Fuel Assembly Geometry and Characteristics
The purpose of this study is to investigate the operational and physical effects involved
with removing soluble boron in normal operations. With that in mind, an SMR design that
follows industry standards would best capture the inherent changes induced from boron-free
operation. With this in mind, the selected SMR design followed industry standards where
possible.
Table 4.1 and 4.2 contain the fuel assembly and full core geometry and specifications
for the selected core. Westinghouse PWR fuel assembly geometry was selected since they
represent an industry standard. The one significant change from normal Westinghouse fuel
assemblies is the active core height. Our SMR was designed with a 200 cm active height, in
order to represent a smaller, compact reactor core designed to fit in a single comprehensive
containment shell typical of current SMR designs.
Table 1: SMR Fuel Assembly Specifications
Table 4.1 SMR Fuel Assembly Specifications
Fuel Assembly Specifications
Fuel Temperature
824 K
Moderator Temperature
563K
Pressure
2175 PSI
Power Density
68.5 kW/L
Assembly Geometry
17 x 17
Pin Pitch
1.26 cm
Fuel Composition
UO2
Fuel Density
Spacer Material
10.41 g/cm2
57% Inconel-718,
43% Stainless Steel
Spacer Density
7.9 g/cm2
Spacer Mass per Axial
20.5 g/cm
Unit Length
Fuel Pin Geometry
Fuel Radius
0.4130 cm
Cladding Thickness
0.0631 cm
Guide Tube Geometry
Inner Shroud Radius
0.57 cm
Shroud Thickness
0.04 cm
Inner Shroud Composition
Moderator
Control Rod Geometry
Inner Shroud Radius
0.57 cm
Shroud Thickness
0.04 cm
Inner Shroud Composition
Ag-In-Cd
38
A total of 57 fuel assemblies
comprise the full core in a circular array
(Figure 3). This value is slightly less than
B&W mPower and Westinghouse (69 and
80 fuel assemblies, respectively), while
larger than NuScale’s SMR (37 fuel
assemblies).
The
selected
design
incorporates 57 fuel assemblies in order to
incorporate a single central fuel assembly,
while still retaining a symmetrical circular
array.
Core power is a function of power
density, core fueled area, and active core
height. The chosen metrics provide 361.1
MWth, placing this design in the same
category as the M&W mPower and
Westinghouse SMR designs. NuScale’s
design is significantly lower, but also
operates on a different design philosophy
that
incorporates
natural
circulation
throughout the core [31]. This selected
design provides forced convection through the primary loop in order to retain industry
standard characteristics, and to avoid particularly egregious thermal hydraulic performance
issues related to natural circulation [50]. The specific coolant mass flux is proportional to the
mass flux in the mPower design, and again represents industry averaged values. The same can
be said for the operating pressure, coolant inlet temperature, and fuel composition.
In the end, simulating the chosen design with soluble boron results in typical depletion
characteristics. This provides a good foundation to compare operating characteristics with and
without soluble boron.
Table 2: SMR Full Core Specifications
39
The initial infinite lattice study on
Table 4.2 SMR Full Core Specifications
Full Core Geometry
Fuel Assemblies
57
Active Core Height
200 cm
Core Volume
5272 liters
Core Fueled Area
26358 cm2
Core Loading
14.68 MT
Fuel Assembly Pitch
21.504 cm
Axial Nodes
25
Node Height
8 cm
Reflector Assembly
2.0% U235 in UO2
Axial Reflector Length
8 cm
Full Core Operating Conditions
Power Density
68.5 kW/L
Thermal Power
361.1 MWth
Pressure
2175 PSI
Coolant Mass Flux
352.3 kg/cm2·hr
Coolant Temperature In
543 K
Relative Power
100%
Relative Flow
100%
Core Inlet Temp
543 K
Boron
0 ppm
the physical effects of soluble boron-free
operation was conducted in CASMO to
model reactor assemblies. Each infinite
lattice was modeled using Westinghouse
PWR geometry, with design specifications
listed in Table 4.1. CASMO performs
thermal
expansion
calculations
automatically, so that a relatively simple
list of input cards can be used to model a
complete infinite lattice. Fuel, guide tube,
and control rod geometry is also included
in Table 4.1.
0
0
0
0
1
2
1
0
0
3
4
5
4
3
0
0
1
4
6
7
6
4
1
0
0
2
5
7
8
7
5
2
0
0
1
4
6
7
6
4
1
0
0
3
4
5
4
3
0
0
1
2
1
0
0
0
0
Radial Reflector
Fuel Assembly
Figure 3: Full core radial geometry.
40
4.2 Physical Effects of Soluble Boron-Free Operation
A study on the physical effects of soluble boron-free operation in a 2-D infinite lattice
compared to normal operation with 2000 and 1000 ppm boron will be presented below. This
study was conducted using Studsvik’s CASMO reactor simulation software [55, 56], which
solved the 2-D transport equation in an infinite lattice [54, 55]. Each lattice was set up with
typical Westinghouse PWR geometry as outlined in section 4.1. These physical effects were
analyzed with 5.0% U235 enriched fuel assemblies.
This study encompassed five different sections:
•
Infinite multiplication factor, kinf, with and without burnable poisons.
•
Fuel depletion and Plutonium production
•
Neutron flux and energy spectra
•
Prompt neutron lifetime and effective fraction of delayed neutrons
•
Reactivity effects: Fuel and Moderator Temperature Coefficients
4.2.1 Multiplication Factor with and without Burnable Poisons
In normal PWR reactor operations, soluble boron is dissolved in the coolant at specific
concentrations, providing strong neutron absorption characteristics in the moderator. All other
neutron poisons exist either in the fuel (burnable poisons) or in discrete locations (control
rods). Since boron is dissolved in the coolant, its suppressive effects on the neutron flux are
felt globally throughout the reactor, acting as a uniform suppressant, since the coolant exists in
a large volume of the reactor core.
Elimination of this suppressant will naturally increase the value of kinf. Figure 4
displays the multiplication factor, kinf, for a boron-free fuel assembly vs 1000 and 2000 ppm
boron.
41
1.6
1.5
1.4
Boron Free
kinf
1.3
1000 ppm Boron
1.2
2000 ppm Boron
1.1
1
0.9
0.8
0
10
20
30
40
50
60
Burnup (MWd/Kg)
Figure 4: kinf vs burnup for 5.0% U235 assemblies with varying amounts of soluble boron.
As expected, kinf is linearly proportional to the boron concentration. Additional boron
suppresses the neutron flux in the core in a linearly increasing fashion. Throughout burnup,
the effects of soluble boron slowly decrease. At around 60MWd/Kg the difference between
the boron free assembly and 2000ppm boron is markedly less than at BOC. This is attributed
to the varying rates of depletion between boron and U235.
Additionally, increasing the boron concentration decreases the cycle length. The 2000
ppm assembly reached kinf = 1 at 25 MWd/Kg, which corresponds to the point at which the
reactor becomes subcritical. The boron-free core reaches kinf = 1 at 43 MWd/Kg, an increase
of 72%. However, this does not mean a boron-free core will have a longer cycle length, as the
initial excess reactivity must be compensated for in some form anyway.
A full core operating with soluble boron will exhibit a boron burnup curve where the
concentration of boron slowly decreases during burnup. Conversely, a boron-free core will
compensate for excess reactivity with burnable poisons that naturally deplete, and with control
rods than are actively removed from the core. All forms of reactivity compensation allow for a
variable amount of compensation, such that a maximum cycle length can be achieved. Thus,
any difference in actual cycle length must be attributed to other physical effects.
Figure 5 shows the multiplication factor vs burnup for a similar group of assemblies
with nominal burnable poisons. These assemblies contain 16 fuel pins poisoned with 8%
Gd2O3 weight percent, and 12 pins with 4% Gd2O3. These poisoned assemblies demonstrate
42
the effect combining burnable poisons with soluble boron will have to be compared to a
soluble boron-free assembly.
1.4
Boron Free with Poisoned Pins
1.3
1000 ppm Boron with Poisoned Pins
kinf
1.2
2000 ppm Boron with Poisoned Pins
1.1
1
0.9
0.8
0
10
20
30
40
50
60
Burnup (MWd/Kg)
Figure 5: kinf vs burnup for poisoned 5.0% U235 fuel assemblies with varying amounts of
soluble boron.
At 2 MWd/Kg, the difference in kinf between the boron-free assembly and 1000 ppm
Boron is 0.060, and from 1000 ppm to 2000 ppm it is 0.053. When the poisons are fully
depleted, at 20 MWd/Kg, the differences are 0.072 and 0.060 respectively – an increase of
around 0.01 in kinf after the poisons are depleted. This unexpected increase arises from the
increased shielding and shadowing from the additional poisons. This shielding decreases the
effectiveness of the poisons, producing tighter coupling at BOC. Once the poisons are
depleted there is less shielding, which increases the difference in kinf between each assembly.
4.2.2 Fuel Depletion and Plutonium Production
Light water reactors fueled with enriched U235 contain two primary effects that
contribute to energy production: fission of U235 and the production and fission of Pu239 and
Pu241. While the fission of U238 from fast neutrons does occur, its contribution is negligibly
low, around 5-8%.
43
Figure 6 displays the weight percent of total fissile Plutonium (Pu239 and Pu241) as a
function of burnup. During operation, plutonium will continue to be produced due to neutron
capture in U238 and the subsequent decay chain into Pu239. Once Pu239 absorbs a neutron, it
either fissions or transmutes into Pu240. Following one more neutron absorption, Pu240 becomes
fissile Pu241.
Weight Percent of Total Plutonium
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
2000 ppm Boron, Pu-239 + Pu-241
0.2
1000 ppm Boron, Pu-239 + Pu-241
0.1
Boron Free, Pu-239 + Pu-241
0
0
10
20
30
40
50
60
Burnup (MWd/Kg)
Figure 6: Weight percent of total Plutonium (Pu239 + Pu241) vs burnup for 5.0% U235 enriched
fuel assemblies with varying amounts of soluble boron.
Since Boron is a resonance absorber, its presence has little direct effect on the fast
neutron population. An examination of the U238 neutron absorption cross section (Figure 7)
shows that U238 has a pronounced resonance structure beginning at approximately 10 eV and
extending to approximately 10 KeV [26, 40]. These resonance integrals create favorable
conditions for neutron absorption in the epithermal and fast neutron spectra. Thus, the
presence of soluble boron would have no direct effect on fissile Plutonium production.
44
Figure 7: U238 neutron absorption cross section (barns) vs energy (MeV).
However, soluble boron does have an indirect effect on plutonium production. Since
Soluble boron suppresses the thermal neutron flux, a higher total neutron flux is required if a
constant power density is to be achieved. Power density is directly correlated to fission events
in the core, and at BOC the only available means of fission is through thermal interactions
with U235 (neglecting the low percentage of U238 fission evens). Thus a higher overall neutron
population, reflected in a lower multiplication factor when compared to a boron-free
assembly, is achieved for a constant power density.
This higher total neutron flux primarily impacts the fast neutron flux profile, since
boron absorbs thermal neutrons. A higher fast neutron flux will lead to increased absorption in
U238 which in turn produces plutonium.
Figure 8 demonstrates how this accumulation of plutonium ultimately affects the total
fission rate balance between uranium and plutonium isotopes. Near BOC, U235 dominates
fission events, but the steady production of plutonium coupled with the depletion of uranium
ultimately results in an assembly that is driven by fission from plutonium at approximately 40
MWd/Kg. However this balance is not affected by the presence of absence of soluble boron.
45
1.20E+11
Fission Rate (Fissions / cm3·sec)
1.00E+11
Uranium - 2000 ppm Boron
Uranium - Boron Free
Uranium - 1000 ppm
Plutonium - 1000 ppm Boron
Plutonium - 2000 ppm Boron
Plutonium - Boron Free
8.00E+10
6.00E+10
4.00E+10
2.00E+10
0.00E+00
0
10
20
30
40
50
60
Burnup (MWD/Kg)
Figure 8: Total uranium and plutonium fission rate vs burnup in 5.0% U235 enriched fuel
assemblies with varying amounts of soluble boron.
Figure 9 displays the weight percent of U235 vs burnup. There is no appreciable
difference between a soluble boron-free core and a core loaded with 2000 ppm boron. While
there is a difference, it is largely negligible due to the large total amount of U235. Thus, even
though the soluble boron-free core is subject to a slightly higher thermal flux and U235 fission
rates, this impact on the total weight percent of U235 is statistically insignificant even at 60
MWd/Kg.
46
Weight Percent Burnup (MWD/KG)
5
4.5
4
3.5
3
2.5
2
2000 ppm Boron
1.5
1000 ppm Boron
1
Boron Free
0.5
0
0
10
20
30
40
50
60
Burnup (MWd/Kg)
Figure 9: Weight percent of U235 vs burnup in 5.0% U235 enriched fuel assemblies with varying
amounts of soluble boron.
4.2.3. Neutron Flux and Energy Spectra
The neutron flux spectrum is an important characteristic in determining the behavior of
the reactor core and understanding the isotopic composition and the contributions from
Plutonium. For the purposes of this study, a two-group model is implemented defining thermal
and fast neutrons as follows:
Group Number
Group 2
Group 1
Name
Thermal
Fast
Lower Boundary
0.0 eV
0.625 eV
Upper Boundary
0.625 eV
10 MeV
In order to determine the differences between operating a core with and without soluble
boron, a characterization of the total, fast and thermal neutron fluxes must be provided.
Figure 10 provides the total neutron flux required to maintain a constant power density
of 68.5 KW/L for the specified SMR. Increasing U235 enrichment would result in a decrease in
the overall flux level due to increasing U235 loading in the core. As a general rule, lowing the
amount of U235 in the core increases the necessary neutron flux level is a constant power
47
density is to be maintained. As Figure 10 shows, the total neutron flux steadily increases
throughout burnup, reflecting the need to compensate for steady U235 depletion.
Additionally, the total neutron flux increases with increasing levels of soluble boron.
This is a reflection of the need to overcome increased thermal absorption in soluble boron,
Total Neutron Flux
which limits the thermal neutron flux available for fission interactions.
9.0E+14
8.5E+14
8.0E+14
7.5E+14
7.0E+14
6.5E+14
6.0E+14
5.5E+14
5.0E+14
4.5E+14
4.0E+14
1000 ppm Boron
2000 ppm Boron
Boron Free
0
10
20
30
40
50
60
Burnup (MWd/Kg)
Figure 10: Total neutron flux vs burnup for 5.0% U235 enriched fuel assembly.
Figure 11 displays the total fast neutron flux in the reactor core. The fast neutron flux
contains 90% of all neutrons in the core, and thus mirrors the total neutron flux, since any
thermal neutron effect is not noticeable in the total neutron flux because of the large fast
neutron population. Since boron is most notably a thermal absorber, the addition of boron only
affects the thermal neutron population. In this manner, the fast neutron spectrum mirrors the
total neutron flux.
48
7.5E+14
Total Fast Neutron Flux
7.0E+14
6.5E+14
6.0E+14
5.5E+14
5.0E+14
1000 ppm Boron
4.5E+14
2000 ppm Boron
4.0E+14
Boron Free
3.5E+14
3.0E+14
0
10
20
30
40
50
60
Burnup (MWd/Kg)
Figure 11: Fast neutron flux vs burnup for 5.0% U235 enriched assemblies.
However, the thermal neutron flux is clearly impacted by the presence of boron (Figure
12). At BOC, the total thermal neutron population remains constant despite the presence of
boron. This is because nearly all fission events occur in U235, which requires thermal neutrons.
In order to maintain a constant power density, the amount of fissions must also remain
constant. However, since the presence of boron increases the initial fast neutron flux,
Total Thermal Neutron Flux
plutonium production increases (as described in Section 4.2.2).
1.0E+14
9.0E+13
8.0E+13
7.0E+13
6.0E+13
5.0E+13
4.0E+13
3.0E+13
2.0E+13
1.0E+13
0.0E+00
1000 ppm Boron
2000 ppm Boron
Boron Free
0
10
20
30
40
50
Burnup (MWd/Kg)
Figure 12: Thermal neutron flux vs burnup for 5.0% U235 enriched assemblies.
60
49
Plutonium production results in an increased percentage of fast neutron fission events,
due to its relatively large fast neutron fission cross section. This increase in fast neutron
fissions reduces the requirements on thermal neutron population, and results in an overall
reduction in the thermal neutron population for increasing concentrations of boron, when
compared to a boron free assembly.
However, the total thermal population gradually increases throughout depletion. This
effect is due to the steady depletion of U235, requiring higher thermal neutron population to
maintain a steady amount of fission events. Since the overall mass of U235 loading still greatly
outweighs plutonium for typical PWRs, an increase in thermal neutron flux is required to
continue to make use of the depleting U235 population.
4.2.4 Effective Fraction of Delayed Neutrons
Delayed neutrons perform an essential function in nuclear power reactors. The average
lifetime of prompt neutrons, those neutrons emitted from the fission event itself, is on the
order of milliseconds. Any impact these neutrons have on the reactor core and the
multiplication factor is therefore extremely fast. If these prompt neutrons were the only
contribution to the total neutron flux, any addition of positive reactivity, no matter how small,
would result in a transient too quick for any human or mechanical system to control. In such a
scenario, the only basis for controlling a reactor would lie in physical reactor feedback
mechanisms such as moderator and fuel temperature coefficients. In any practical sense, a
controllable nuclear reactor would be physically impossible.
Thankfully, prompt neutrons are not the only source of neutrons. Delayed neutrons are
not emitted from the fission event itself, but rather from fission fragments with varying halflives. The numerous radioactive elements that decay via neutron emission are typically
collected in 6 main groups based on their general half-life [13]. These groups contain elements
whose half-lives range anywhere from 10-3 seconds to almost 1 min. While this is still
relatively quick, it is on average several orders of magnitude longer than the prompt neutron
lifetime. Thus, even though only 0.65% of the overall neutron flux is comprised of these
delayed neutrons, their relatively long half-lives push the average neutron lifetime to levels
that are manageable for both human and mechanical control.
50
In this manner, an investigation on the impact boron-free operation has on the fraction
of delayed neutrons and the average neutron lifetime is crucial. Figure 13 shows the fraction
of delayed neutrons vs burnup.
Effective Delayed Neutron Yield
0.008
0.007
0.006
0.005
0.004
2000 ppm Boron
0.003
1000 ppm Boron
0.002
Boron Free
0.001
0
0
10
20
30
40
50
60
Burnup (MWd/Kg)
Figure 13: Effective delayed neutron yield vs burnup for 5.0% U235 fuel assemblies.
As can be seen, the elimination or addition of boron has no appreciable effect on
delayed neutron contributions. Different fertile isotopes have different fission product yields,
and these fission products result in different contributions of delayed neutrons. Nevertheless,
the increase in plutonium production (Section 4.2.2) and the resultant increase in fast fission
events in plutonium for fuel assemblies with soluble boron does not result in any measurable
different in the total effective delayed neutron yield.
4.2.5 Reactivity Feedback Mechanisms
Several reactor parameters that determine the reactivity of a reactor are also functions of
temperature [13]. Of most significance is the effect that fuel and moderator temperature have
on reactivity, as any increase or decrease in fuel and moderator temperature will naturally
follow any increase or decrease in reactor power. Such temperature effects on reactivity must
be defined due to their significant contribution toward the inherent stability of the reactor.
51
All coefficients are defined by the simple relation:
𝛼=
𝑑𝜌
𝑑𝑇
where 𝛼 represents the feedback coefficient. As defined, the simple derivative of reactivity
divided by the change in temperature for fuel, moderator, etc, defines the temperature
coefficient of the reactor at that state point. It follows that, if 𝛼 is positive, any increase in
temperature will result in a further increase in reactivity through the temperature coefficient.
This increase in reactivity further increases the temperature, and the reactor power
exponentially increases until some other mechanism stops the process. Conversely, if 𝛼 is
negative, any increase in reactivity will result in a subsequent decrease in reactivity through
the temperature coefficient, and the reactor will naturally stop increasing through physical
effects alone.
In this manner, the inherent stability of the reactor is largely defined by these
temperature coefficients. The NRC recognizes the importance of these inherent stability
factors and will not license any reactor with a positive fuel or moderator temperature
coefficient in all conceivable reactor state points [25].
There are two main reactor feedback coefficients of primary concern for PWRs: Fuel
temperature coefficient, moderator temperature coefficient, and void coefficient. Each fuel
assembly was sampled at a chosen state point. For the purposes of this thesis, three state
points comprise the reactor conditions of most interest: At full power and normal operating
conditions, during startup, and at cold shutdown. These three conditions cover the range of
reactor conditions in which a transient is most likely to occur. The relevant fuel and moderator
temperatures for each condition are given below:
Average Moderator
Average Fuel
Temperature (K)
Temperature (K)
Hot Full Power
563
824
Cold Full Power
293
824
Cold Zero Power
293
293
Reactor State Point
52
Calculating both MTC and FTC requires a simple ratio:
𝑅𝐹𝑀(𝑑𝑒𝑝𝑙𝑒𝑡𝑖𝑜𝑛) =
𝑑𝑒𝑝
𝑘0
0
− 𝑘1
𝑇0 − 𝑇1
Where the Reactor Feedback Mechanism value (RFM) as a function of depletion is
equal to a ratio of the difference in the multiplication factor at the initial state point
temperatures (𝑘0 ) and a slightly higher state point temperature (𝑘1 ), and the difference in the
actual initial state point temperatures (𝑇0 and 𝑇1 ).
For example, consider the Moderator Temperature Coefficient (MTC) at BOC and with
hot full power conditions. The MTC value would therefore be:
𝑀𝑇𝐶(0 𝑀𝑊𝑑/𝐾𝑔) =
0 𝑀𝑊𝑑/𝐾𝑔
0 𝑀𝑊𝑑/𝐾𝑔
𝑘563 𝐾 𝑓𝑢𝑒𝑙 𝑡𝑒𝑚𝑝 − 𝑘583 𝐾 𝑓𝑢𝑒𝑙 𝑡𝑒𝑚𝑝
563 𝐾 − 583 𝐾
Appropriately, the units for such a calculation are reflected as a change in the
𝛿𝑘𝑖𝑛𝑓
multiplication factor per degree Kelvin (
𝐾
). However traditional MTC and Fuel
Temperature Coefficients (FTC) are expressed in units of reactivity, 𝜌 [13] (where 𝜌 =
In order to convert the current units
performed:
𝛿𝑘𝑖𝑛𝑓
𝐾
to the traditional
0 𝑀𝑊𝑑/𝐾𝑔
𝑀𝑇𝐶(0 𝑀𝑊𝑑/𝐾𝑔) =
𝑘563 𝐾 𝑓𝑢𝑒𝑙 𝑡𝑒𝑚𝑝 − 1
0 𝑀𝑊𝑑/𝐾𝑔
𝑘563 𝐾 𝑓𝑢𝑒𝑙 𝑡𝑒𝑚𝑝
−
𝛿𝜌
𝐾
𝑘−1
𝑘
).
, the following operation is
0𝑀𝑊𝑑 ⁄𝐾𝑔
𝑘583 𝐾 𝑓𝑢𝑒𝑙 𝑡𝑒𝑚𝑝 − 1
0𝑀𝑊𝑑 ⁄𝐾𝑔
𝑘583 𝐾 𝑓𝑢𝑒𝑙 𝑡𝑒𝑚𝑝
563 𝐾 − 583 𝐾
4.2.5.1 Fuel temperature coefficient
The most important feedback mechanism concerns the fuel temperature coefficient
(FTC). The reactor fuel temperature will be first to respond to any increase in power since
there is no need for any heat removal effects to take place before the fuel increases in
temperature. The fission events occur in the fuel itself, so any increase in power almost
53
instantaneously increases the fuel temperature as well. Thus, if the fuel temperature coefficient
is positive, the feedback loop will be inherently fast and lead to greater instability. For this
reason, a careful examination of the fuel temperature coefficient in boron-free reactors must
be performed.
Figure 14 demonstrates the fuel temperature coefficients vs burnup for each of the three
state point conditions, both with and without soluble boron.
Fuel Temperature Coefficient (δρ/K)
8.0E-05
6.0E-05
4.0E-05
2.0E-05
0.0E+00
0
10
20
30
40
50
60
-2.0E-05
-4.0E-05
Burnup (MWd/Kg)
Hot Full Power - 2000 ppm Boron
Hot Full Power - Boron Free
Cold Zero Power - 2000 ppm Boron
Cold Zero Power - Boron Free
Cold Full Power - Boron Free
Cold Full Power - 2000 ppm Boron
Figure 14: Fuel temperature coefficient vs burnup for hot full power, cold full power, and cold
zero power with and without soluble boron.
Generally speaking, the behavior of the fuel temperature coefficient reflects the impact
of resonance absorption in U238, and the Doppler broadening of the resonances with increases
in temperature. Additionally, the increasing presence of Plutonium and its unique cross section
and resonance characteristics produce variations in the value of the FTC throughout burnup.
To explain the behavior of the FTC in relation to boron concentration, it is important to
note that the presence of soluble boron results in an increased fast thermal neutron flux. As the
temperature of the fuel is increased, so too is the resonance absorption cross section for U238.
Fast neutrons which require no thermalization are absorbed in this resonance absorption cross
54
section, and thus a larger fast neutron population will result in a more positive FTC. This
primary effect produces the more negative FTC with the removal of soluble boron.
Figure 14 shows that a fuel assembly with soluble boron possesses a positive FTC
during cold full power, a possible condition at reactor startup. This creates inherent safety
risks and a full safety analysis report would be required to exhaustively investigate this effect.
However, the removal of soluble boron not only decreases the FTC in all selected reactor state
points, but produces a negative FTC at cold full power.
Additionally, while the FTC does become positive as burnup progresses due to the
accumulation of plutonium in the core, soluble boron-free fuel assemblies do not become
positive until 45 MWd/Kg, at which point the multiplication is below 1, and is therefore a
condition that is unlikely to arise.
4.2.5.2 Moderator temperature coefficient
The second feedback mechanism of significance is the MTC. While the FTC provides
the fastest feedback mechanism due to its close proximity to the fission events, the MTC also
plays an important role due to its necessary moderation capabilities. The feedback loop
associated with the MTC will be slower than the FTC due to the required heat transfer from
fuel to coolant before any reactivity effect will materialize.
Figure 15 demonstrates the MTC for the above three state points with varying amounts
of soluble boron.
55
Moderator Temperature Coefficient (δρ/K)
6.0E-04
4.0E-04
2.0E-04
0.0E+00
0
10
20
30
40
50
60
-2.0E-04
-4.0E-04
-6.0E-04
Burnup (MWd/Kg)
Hot Full Power - 2000 ppm Boron
Hot Full Power - Boron Free
Cold Zero Power - 2000 ppm Boron
Cold Zero Power - Boron Free
Cold Full Power - 2000 ppm Boron
Cold Full Power - Boron Free
Figure 15: Moderator temperature coefficient for hot full power, cold full power, and cold
zero power with and without soluble boron.
As can be seen, a decrease in soluble boron results in a stronger negative MTC during
hot full power, increasing the inherent stability of the reactor. This effect can be partly
attributed to the density differences resulting from the addition of boron. Since boron is a
strong neutron absorber, and since the presence of boron in the moderator takes away space
that would be occupied by a strong neutron moderator (H2O), any addition of boron results in
a decrease in moderation potential. But beyond that simple effect, temperature and density are
inversely proportional, and any decrease in moderator density by definition reduces the
amount of moderator atoms in a given volume. This decrease fundamentally impacts the
ability to moderate neutrons, and results in a lower resonance escape probability, and therefore
a decrease in the multiplication factor. This effect is shown in the negative MTC.
Figure 15 shows how the MTC at BOC for a fuel assembly with soluble boron is
slightly positive at hot full power conditions. This condition is very likely, since reactors
generally operate at full power to enhance efficiency, and the positive MTC would require
extensive safety analysis. Thus, removing soluble boron not only increases the inherent
56
stability of the reactor at BOC and for the other selected reactor state points, but also prevents
a possibly exhaustive and expensive safety analysis associated with the positive MTC.
4.2.6 Conclusion
Impacting any aspect of operation in a nuclear reactor will affect several other variables
due to the inherently complex physical mechanisms involved.
Something as seemingly
innocuous as removing soluble boron from the coolant was found to carry significant
implications on several key parameters. While this was not a comprehensive evaluation on all
the aspects impacted by soluble boron-free operation, a few effects with significant safety
implications were confirmed.
Most notably, removing soluble boron was found to harden the neutron spectrum in
the reactor core. A hardened spectrum results in increased neutron absorption in U238, leading
to greater quantities of plutonium. While some reactors are designed to produce plutonium as
a way to increase the core lifetime, plutonium production in SMRs carries significant safety
implications.
The fuel temperature reactivity coefficient was found to be directly impacted by
plutonium production due to its increased resonance absorption capabilities. Any increase in
plutonium fundamentally increases the FTC, reducing the inherent stability of the reactor. In
fact, removing soluble boron changed a previously positive FTC for cold full power
conditions to a negative value. This dramatic reduction would not only increase inherent
safety of the reactor during startup scenarios, but it would also carry the potential of
eliminating exhaustive and expensive safety analysis reports.
Similar to the fuel temperature coefficient, removing soluble boron was found to
fundamentally reduce the moderator temperature coefficient. This also carries significant
safety implications, and is identified as one of the primary motivations for removing soluble
boron in normal operations.
In the end, while some physical effects remain unchanged by the removal of soluble
boron, several key factors were found to be beneficially impacted. While this study is not
exhaustive, the above findings help confirm motivations for soluble boron free operation.
57
4.3 Development and Analysis of Fuel Assemblies for use in Full Core Environment
The development and analysis of fuel assemblies for use in a full core environment was
conducted in CASMO-4E. Technically CASMO models an infinite lattice that contains a 17 x
17 grid of fuel assemblies with specifications listed in section 4.1. CASMO then solves the 2D neutron transport equation and provides detailed data on neutron behavior, generates cross
sections for every conceivable reactor state point, and returns the eigenvalue solution for each
depletion state point, among other things [57]. This data can then be supplied to SIMULATE3K and be used as the basis for reactor fuel assemblies in a full core environment.
In the soluble boron-free core the unique requirements on burnable poisons and control
rods for reactivity suppression necessitate the need for a comprehensive search to find ideal
burnable poison and control rod placements. The initial phase of this study must keep three
things in mind:
•
First, initial ideas for soluble-boron free operation include complex axial grading of
burnable poisons to compensate for any skewed axial power profile. Since such axial
grading would ultimately be dependent on specific reactivity suppression needs over
the lifetime of the core, the development of several different fuel assemblies with
multiple levels of reactivity suppression through burnable poisons is required. These
levels also incorporate three elements:
•
o
Initial reactivity compensation
o
Rate of burnable-poison depletion
o
Burnable poison effective lifetime.
Second, initial ideas for soluble-boron free operation also include axial grading of
U235 enrichment. Therefore, each burnable poison arrangement must also be
performed for different overall U235 enrichments.
•
Finally, several fuel assemblies with different values for each of the above elements
are required in order to provide a comprehensive set of fuel assemblies for use in fullcore analysis. In this manner, any necessary fuel loading arrangement can be
provided.
58
4.3.1 Burnable Poison Search
The ability to provide any necessary fuel loading arrangement requires a comprehensive
set of fuel assemblies that possess unique burnup characteristics. These unique burnup
characteristics fall into three types:
1) Fuel assemblies with partial to moderate initial reactivity compensation with a flat
burnup profile.
2) Fuel assemblies with moderate to strong initial reactivity compensation with a peaked
burnup profile.
3) Fuel assemblies with different burnable poison effective lifetimes.
Types 1 and 2 are mutually exclusive, but both Type 1 and Type 2 can be coupled with
different burnable poison effective lifetimes (Type 3). In this manner, a comprehensive set of
fuel assemblies can be provided.
4.3.1.1 Fuel Assembly Type 1: Fuel assemblies with partial to moderate initial reactivity
compensation with a flat burnup profile.
In order to find fuel assemblies that match type 1 requirements, an ideal burnable
poison loading geometry for a flat burnup profile must be determined. To create a flat burnup
profile, a look at the physics involved is required.
Since burnable poisons are strong neutron poisons, their presence in fuel pins strongly
influences
the local thermal neutron flux. This results in a marked depression of the local
multiplication factor, which diffuses out to ultimately influence the overall multiplication factor
for the entire fuel assembly. The presence of even relatively small amounts of these strong
poisons has a large impact on the multiplication factor, so only a small fraction of fuel pins
within the fuel assembly are loaded with burnable poisons. Even then, the enrichment of
burnable poisons in the fuel pin rarely exceeds 10%.
By way of example, consider a fuel assembly with only 40 out of the 264 fuel pins
poisoned with 4% Gd2O3. The burnup characteristics of such a sparsely poisoned fuel
assembly are seen in contrast to those for a non-poisoned fuel assembly in Figure 16. It can
clearly be seen how the initial multiplication factor of the poisoned assembly is markedly
59
suppressed from the non-poisoned assembly. However, the high flux environment quickly
depletes the available Gd2O3 and its neutron absorption capabilities gradually deplete with
time, resulting in a smooth increase in the initially depressed multiplication factor. Eventually
all of the Gd2O3 is transmuted by neutron capture, and the fuel assembly mirrors the nonpoisoned assembly. This occurs at a burnup of approximately 14 MWd/Kg.
1.5
1.4
1.3
Kinf
1.2
1.1
1
Non-Poisoned Assembly
0.9
40 Pins Poisoned with 4% Gd2O3
0.8
0
5
10
15
20
25
30
Burnup (MWd/Kg)
Figure 16: kinf vs burnup for a poisoned and non-poisoned fuel assembly.
If a flat burnup profile is desired, the depletion of Gd2O3 must match the natural
depletion of U235, so the overall multiplication factor remains constant until all the Gd2O3 has
been depleted. To accomplish this, the fuel assembly must be engineered by altering three
variables:
•
The number of poisoned fuel pins.
•
The amount of Gd2O3 in each poisoned fuel pin.
•
The geometric arrangement of each poisoned fuel pin.
To accomplish this, five typical PWR burnable poison geometric loading arrangements
were identified. These five typical arrangements formed five major groups of fuel assemblies.
The loading geometry for each group is given in Figure 17. As can be seen, each different
loading arrangement contained a different overall amount of poisoned fuel pins.
60
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BP Geometry #1: 16 Poisoned Pins
BP Geometry #2: 16 Poisoned Pins
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BP Geometry #3: 28 Poisoned Pins
BP Geometry #4: 24 Poisoned Pins
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BP Geometry #5: 20 Poisoned Pins
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Figure 17: Burnable poison loading geometry for each of the 5 major groups. Red indicates a
control rod, blue is a poisoned fuel pin, and white is a regular fuel pin.
61
Several fuel assemblies with varied Gd2O3 weight fractions were modeled for each
group. An initial study in which all poisoned pins were kept at the same Gd2O3 weight fraction
(4%) was performed. These fuel assemblies are shown in Figure 18.
1.3
1.25
kinf
1.2
1.15
Poisoned Loading #1
Poisoned Loading #2
1.1
Poisoned Loading #3
1.05
Poisoned Loading #4
Poisoned Loading #5
1
0
2
4
6
8
10
12
14
16
18
20
Burnup (MWd/Kg)
Figure 18: kinf vs burnup for fuel each major burnable poison loading geometry.
The difference in reactivity compensation is attributed to a few different effects. First,
the total amount of poisoned material and the number of poisoned pins varies for each fuel
assembly type. This is best seen between Burnable Poison geometry (BP geometry) #1 and #3,
where the kinf at BOC is 1.24 and 1.1 respectively, a difference of 0.13. However, even
between #1 and #2, which both contain 16 poisoned pins, a kinf difference of 0.04 at BOC can
be seen. This is attributed to differences in the radial neutron flux profile, which creates
natural hot spots where kinf is larger.
In fuel assemblies with 17x17 geometry, the central fuel pins that are not immediately
surrounded by a control rod tube will be most reactive. Thus, absorber material placed in these
regions will have a large effect on the neutron flux, and therefore the value of kinf. BP
geometry #1 has poisoned pins further from the center, which appropriately have less of an
62
effect on the neutron flux. Conversely, BP geometry #2 has more pins closer to the center, and
this has a larger effect on the neutron flux. This effect produces the 0.04 difference in kinf
between the two assemblies at BOC.
An important effect to take note of is the initial sharp reactivity drop exhibited in each
fuel assembly. This is produced from the buildup of Samarium and Xenon, natural fission
products. Being strong neutron poisons, as more and more are produced they begin to have an
appreciably large effect on reactivity. But since they both possess relatively short half-lives
with respect to the length of a cycle, an equilibrium steady-state concentration is quickly
reached.
It is also important to note that this infinite lattice study, while retaining shroud tubes
for both instrumentation and control rods, is not modeled with any control material in the
control rod positions. Instead, moderator exists in the open control rod tubes. During normal
operation in a 3-D fuel assembly we may expect control rods to be fully or partially inserted.
In this scenario, shadowing and shielding effects would have a pronounced effect on the worth
associated with poisoned pins right next to the control rods. The depression in the neutron flux
produced from the insertion of the control rods reduces the worth associated with both the
control rods and any poisoned pins nearby, while increasing the neutron flux in areas that do
not have any control material.
As can be seen in Figure 18, simply varying the overall BP geometry does not produce
a flat burnup, and increasing or decreasing the Gd2O3 weight fraction would not significantly
alter the behavior of kinf over burnup. Therefore, a further study that individually varies the
Gd2O3 weight fractions is required. While this burnable poison loading will change
individually from one pin to the next, care was taken to maintain symmetry across the entire
fuel assembly. A large number of fuel assemblies were modeled, with several different poison
loading patterns for each BP geometry type. Some of these fuel assemblies are shown in
Figure 19, where each different enrichment loading pattern clearly provides unique burnup
characteristics.
63
1.25
1.23
1.21
1.19
Kinf
1.17
1.15
1.13
1.11
1.09
1.07
1.05
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20
25
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Burnup (MWd/Kg)
Figure 19: kinf vs burnup for 5.0% U235 enriched fuel assemblies with variations of all 5 BP
geometries and with individually varied Gd2O3 weight percentages.
As can be seen, any sort of burnup profile can be attained by altering the BP weight
fraction loading geometry. A few general trends can be seen. First, 5 overall groups of
assemblies can be identified by their relative initial kinf levels. Fuel assemblies where kinf
begins between 1.23-1.19 belong to assemblies of BP geometry type 1 and type 2. Similarly,
1.18-1.14 belongs to type 5, 1.13-1.12 belongs to type 4, and 1.11-1.08 belongs to type 3.
This grouping effect can be attributed to the differences in the overall number of
poisoned fuel pins. To examine why, consider four different fuel assemblies: Two from BP
geometry type 1, one loaded with all 16 fuel pins at 2% Gd2O3, and the other with 12% Gd2O3;
and Two from BP geometry type 3, again with all 28 pins 2% and 12%. Figure 20 shows kinf
vs burnup for these assemblies.
64
1.3
BP Geometry 3 with 12% Gd2O3
BP Geometry 3 with 2% Gd2O3
BP Geometry 1 with 12% Gd2O3
BP Geometry 1 with 2% Gd2O3
1.25
kinf
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25
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Burnup (MWd/Kg)
Figure 20: kinf vs burnup for BP geometry 1 and 3, with 12% and 2% w/o Gd2O3.
As can be seen, the initial excess reactivity suppression provided by the assemblies is
driven by the total number of poisoned fuel pins, and not the overall amount of absorber
material. Comparing BP Geometry 3 with 2% Gd2O3 with BP Geometry 1 with 12% Gd2O3
demonstrates this effect. The 12% assembly has almost 3.5 times the amount of absorber
material, yet the 2% assembly provides more initial reactivity suppression. The reason is due
to shadowing and shielding effects. The 12% poisoned fuel pins provide such a drop in the
neutron flux that they limit their effectiveness. There comes a point where adding more
absorber material to the same fuel pin produces diminishing returns, reducing the overall
effectiveness of the absorber material.
On the other hand, this effect does improve the lifetime of the poison. Additionally, the
total amount of poison in the assembly is the driving force behind the effective lifetime of the
poisons. The 2% Gd2O3 assemblies both demonstrate significantly quick burnup rates, as they
burn out relatively quickly and behave like non-poisoned assemblies around 7 MWd/Kg. This
is due both to a relatively small total amount of poisons, and to the lack of shielding and
shadowing which increases the effectiveness of the absorber material. Meanwhile, the 12%
assemblies demonstrate no appreciable increase in kinf, maintaining the same overall
65
effectiveness due to strong shadowing and shielding effects. They finally completely burn out
at around 25 MWd/Kg.
As these two effects demonstrate, mixing and matching different Gd2O3 weight
fractions and total absorber loading amounts produces the various burnup characteristics
demonstrated in Figure 19.
Since a flat burnup profile is desired, each fuel assembly in Figure 19 that exhibited a
relatively flat burnup was identified and further modified. In this manner, a group of 5 final
fuel assemblies each with a relatively flat burnup profile were selected. These are shown in
Figure 21.
1.2
1.18
1.16
1.14
Kinf
1.12
1.1
1.08
1.06
1.04
1.02
1
0
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10
15
20
25
30
Burnup (MWd/Kg)
Figure 21: kinf vs burnup for final 5 fuel assemblies that exhibit a flat burnup profile.
Clearly, different total concentrations of Gd2O3 in the various fuel assembly designs,
and dissimilar numbers of poisoned fuel pins in each assembly, provides a varying amount of
total excess reactivity compensation and contrasting effective burnable poison lifetimes. These
five fuel assemblies were selected for potential use in a full core environment, so iterations of
each of the five fuel assemblies were also modeled with different U235 enrichments (from
2.50% to 4.95% by 0.5%). These fuel assemblies are provided in the Appendix.
66
4.3.1.2 Fuel Assembly Type 2: Fuel assemblies with moderate to strong initial reactivity
compensation with a peaked burnup profile
A flat burnup profile will be useful in certain environments, but the ability to have a
peaked profile will be useful in other environments. Specifically, anything from a strong initial
reactivity suppression that quickly depletes to moderate initial reactivity suppression with a
long Gd2O3 lifetime will be potentially useful in a full-core environment. To model these fuel
assemblies, three different variables were independently altered:
1) Total loading amount of Gd2O3
2) Specific enrichment percentages in different fuel pins (while maintaining symmetry)
3) BP Geometry type
As discussed above, altering these three variables produces a wide variety of burnup
profiles.
4.3.1.2.1 Fuel Assembly Type 2: Fuel assemblies with strong initial reactivity compensation
with quick depletion
Creating fuel assemblies that provide strong initial reactivity compensation with quick
depletion requires fuel assemblies with a large amount of poisoned pins that contain a low
Gd2O3 enrichment percentage. The large number of poisoned pins will provide the strong
initial suppression, while the low Gd2O3 percentage ensures a quick depletion.
Figure 22 shows the poisoned pin geometry in the 17x17 fuel assembly for fuel
assemblies with these depletion characteristics. 64 out of the 264 total fuel pins are poisoned
with 2%, 3%, and 4% weight percent Gd2O3. Figure 23 demonstrates kinf vs burnup for these
5.00% U235 enriched fuel assemblies. As can be seen, the numerous poisoned pins provide
strong initial reactivity suppression, while the low Gd2O3 weight percent allows for a quick
burnup. The quick burnup results in a smooth increase in kinf until the all the Gd2O3 has been
burned at which point a natural depletion curve is seen. In this case, 2% Gd2O3 results in an
initial kinf of 0.95, far from its natural non-poisoned state of 1.35. Around 10 MWd/Kg all
Gd2O3 has depleted, and the fuel assembly resembles a non-poisoned assembly.
67
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Figure 22: Poisoned pin geometry for fuel assemblies with strong initial reactivity
compensation and quick Gd2O3 depletion.
1.4
1.3
Kinf
1.2
1.1
1
Non-Poisoned Assembly
2% Gd2O3
0.9
3% Gd2O3
4% Gd2O3
0.8
0
5
10
15
20
25
30
Burnup (MWd/Kg)
Figure 23: kinf vs burnup for 5.0% U235 fuel assemblies with 64 poisoned pins.
68
To provide a complete set of fuel assemblies for use in a full core environment, the 2%,
3% and 4% Gd2O3 fuel assemblies were paired with different U235 enrichments (from 2.50% 5.0% by 0.5% increments). A graph of kinf vs burnup for these fuel assemblies is provided in
the appendix.
Another possibility for strong initial reactivity compensation with a quick Gd2O3
depletion could be found in a slightly lower number of poisoned fuel pins coupled with a
slightly higher Gd2O3 weigh percentage. In such a configuration, a small increase in Gd2O3
lifetime would provide more initial reactivity compensation. Two different geometrical BP
layouts, with 52 and 64 poisoned pins respectively, are shown in Figure 24.
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Figure 24: Burnable poison loading geometry with 52 and 64 poisoned pins.
Both of these assemblies are loaded with 5% and 6% Gd2O3, and kinf vs burnup is
displayed in Figure 25.
69
1.4
1.3
Kinf
1.2
1.1
1
Non-Poisoned Assembly
52 Poisoned Pins with 5.0% Gd2O3
52 Poisoned Pins with 6.0% Gd2O3
56 Poisoned Pins with 5.0% Gd2O3
56 Poisoned Pins with 6.0% Gd2O3
0.9
0.8
0
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30
Burnup (MWd/Kg)
Figure 25: kinf vs burnup for 5.0% U235 enriched fuel assemblies with 52 and 56 pins poisoned
with 5.0% and 6.0% w/o Gd2O3.
These fuel assemblies create additional burnup characteristics that might be useful in a
full core environment. Identical assemblies for each of the above 4 assembly types with
different U235 enrichments were also created (2.50%-5.0% by 0.5%), and those graphs are
available in the appendix.
4.3.1.2.2 Fuel Assembly Type 2: Fuel assemblies with strong initial reactivity compensation
with slow depletion
To create fuel assemblies with strong initial reactivity compensation and slow depletion
there must be a large number of poisoned pins with a higher Gd2O3 weight percent. Figure 26
shows the different burnable poison loading patterns. The number of poisoned pins steadily
increases from 44 to 64 out of 264. Each burnable poison geometry was modeled with both
5% and 6% Gd2O3. Figure 27 shows the behavior of kinf vs burnup for 5.0% U235 enriched
assemblies by burnable poison loading geometry.
70
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44 Poisoned Pins
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Figure 26: Five different burnable poison loading geometries for fuel assemblies with strong
initial reactivity compensation and slow depletion.
71
1.4
1.3
Kinf
1.2
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48 Poisoned Pins
1
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56 Poisoned Pins
0.9
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Non-Poisoned Assembly
0.8
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Burnup (MWd/Kg)
Figure 27: kinf vs burnup for 5.0% U235 enriched fuel assemblies with various numbers of
poisoned fuel pins at 5.0% w/o Gd2O3.
As expected, initial reactivity compensation is linearly proportional to the number of
poisoned fuel pins. Also, Gd2O3 depletion is largely irrespective of the number of poisoned
pins – all 5 fuel assemblies resume a normal burnup curve around 15 MWd/Kg. Figure 28
reinforces these findings by showing kinf vs burnup for 5.0% U235 enriched assemblies with
6.0% Gd2O3. There is slightly more initial reactivity compensation, but the largest difference
is in the Gd2O3 lifetime, which completely depletes around 17 MWd/Kg.
72
1.4
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Kinf
1.2
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48 Poisoned Pins
1
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56 Poisoned Pins
0.9
64 Poisoned Pins
Non-Poisoned Assembly
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Burnup (MWd/Kg)
Figure 28: kinf vs burnup for 5.0% U235 enriched fuel assemblies with various numbers of
poisoned fuel pins at 6.0% w/o Gd2O3.
A final group of fuel assemblies were created to provide an extraordinarily large
amount of initial reactivity suppression. These assemblies were not designed for realistic use
in a full-core environment; rather they were created for use in hypothetical scenarios to see
how inserting a severely depressed fuel assembly in some axial part of a full-core environment
would affect core operations and the axial power profile. In this manner, they could provide
insight into the upper limit to the impact of poisoned assemblies in a full core environment.
Figure 29 shows the five different burnable poison geometrical loading arrangements
that were used to create these fuel assemblies. The number of poisoned pins linearly increases,
containing 64, 100, 136, 172, and finally 264 poisoned pins. Obviously such dramatically
poisoned pins will exhibit very strong shadowing and shielding effects, along with a highly
suppressed neutron flux.
73
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Figure 29: Five different burnable poison loading geometries for fuel assemblies with
extraordinarily large initial reactivity compensation.
74
Each of these fuel assemblies were loaded with 2%, 3% and 4% weight percent Gd2O3.
Anything above 4% Gd2O3 was observed to provide diminishing returns, since the 4%
poisoned fuel assemblies would already take a relatively long time to deplete due to the strong
shielding and shadowing effects. Figures 30, 31, and 32 show kinf vs burnup for 2%, 3%, and
4% Gd2O3 assemblies.
1.3
1.2
1.1
Kinf
1
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Burnup (MWD/KG)
Figure 30: kinf vs burnup for 5.0% U235 enriched fuel assemblies with various numbers of
poisoned fuel pins (from Figure 29) at 2.0% w/o Gd2O3.
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Figure 31: kinf vs burnup for 5.0% U235 enriched fuel assemblies with various numbers of
poisoned fuel pins (from Figure 29) at 3.0% w/o Gd2O3.
75
1.3
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1
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Burnup (MWD/KG)
Figure 32: kinf vs burnup for 5.0% U235 enriched fuel assemblies with various numbers of
poisoned fuel pins (from Figure 29) at 4.0% w/o Gd2O3.
As expected, increasing the number of poisoned pins dramatically decreases the value
of kinf. Increased shielding and shadowing also decreases Gd2O3 burnup. For 4% Gd2O3, a fuel
assembly with 64 poisoned pins resumes a normal burnup curve around 12 MWd/Kg, whereas
264 poisoned pins depletes at 16 MWd/Kg.
4.3.1.3 Conclusion
In the end, over 80 fuel assemblies were modeled in CASMO, each with unique burnup
characteristics. These differing burnup characteristics provide a wide range of options for use
in a full core environment. Certain burnup characteristics may be required to manage the axial
power offset that arises from partial control rod insertion in a soluble boron-free core.
76
4.4 Description and Analysis of Initial Strategies for Soluble Boron-Free Operation in the
Selected SMR Design
As previously discussed, removing soluble boron in a full core environment challenges
the axial power profile due to the dependence on discrete poisons. This challenge must be met
by carefully considering each factor that affects the axial power profile. The main factor arises
from increased dependence on control rods when soluble boron is removed. These rods will be
partially inserted in the core during normal operations, and will thus impact the axial power
profile negatively. To combat this, axially grading both burnable poisons and 235U
enrichment percentage, if done properly, can minimize and negate the impact from active
control rods.
For example, since any partial insertion of control rods will leave the bottom of the core
unsuppressed, loading this region of the core with strong burnable poisons can create a more
uniform reactivity suppression profile throughout the core – and therefore a more uniform
axial flux profile. But the nature of a full core burnup cycle is not steady-state. This initial
arrangement of strong poisons at the bottom to overcome the partial insertion of control rods
would only work properly for a few MWd/Kg of burnup. As the U235 naturally depletes, the
control rods are slowly removed, which alters the impact the control rods have on the axial
power profile. Additionally, as their name suggests, the burnable poisons slowly deplete as
well, reducing their effectiveness as the core is burned. This dynamic situation creates
challenges for the reactor engineer to discover an arrangement that will properly balance the
axial flux profile throughout the lifetime of the core.
This chapter will explore different methodologies to contain this dynamic environment,
and contains two main sections:
•
First, establishing a proper radial geometry that minimizes the radial peaking factors.
•
Second, searching for a proper axial arrangement of burnable poisons and U235 fuel
enrichment to create as uniform an axial power profile as possible
.
4.4.1 Full Core Radial Loading Geometry
Before jumping into axially grading a full core environment, a foundational 2-D U235
enrichment loading geometry must be selected. This loading arrangement will serve as a
77
template upon which only axial variations in burnable poisons will be altered. In this manner,
a 2-D profile that minimizes radial peaking factors will be maintained throughout the core.
To achieve this, multiple geometrical loading arrangements were analyzed. In the first
search, only the U235 enrichment was varied, with no burnable poisons present anywhere in the
core. The idea was to determine which enrichment loading geometry would perform best with
respect to the 2-D radial power profile.
Figure 33 shows the final geometrical loading
arrangement that appears to demonstrate a preferred performance.
4.95 4.95 4.95
4.95 4.50 4.00 4.50 4.95
4.95 4.50 3.50 3.50 3.50 4.50 4.95
4.95 4.50 3.50 3.50 4.00 3.50 3.50 4.50 4.95
4.95 4.00 3.50 4.00 3.00 4.00 3.50 4.00 4.95
4.95 4.50 3.50 3.50 4.00 3.50 3.50 4.50 4.95
4.95 4.50 3.50 3.50 3.50 4.50 4.95
4.95 4.50 4.00 4.50 4.95
4.95 4.95 4.95
Figure 33: 2-Dimensional U235 Enrichment Loading Geometry.
The outer ring of fuel assemblies was deliberately kept at 4.95% U235 for the duration of
the search. Since smaller cores are more sensitive to neutron leakage, the idea was to minimize
the effects of leakage by placing highly enriched assemblies on the outer ring. While the
current full core geometry makes use of a reflector segment around this outer ring, the leakage
effects still have a dramatic influence on the overall neutron flux and thus the relative power
production in the outer ring. So while this arrangement does not lend itself to an efficient use
of fuel, it is beneficial from a neutron economy perspective.
Figure 34 displays the 2-D relative power fraction at the center of the core and at BOC
for the above loading geometry.
78
0.81 0.89 0.81
0.9 1.07 1.03 1.07 0.9
0.9 1.11 1.04 1.09 1.04 1.11 0.9
0.81 1.07 1.04 1.1 1.13 1.1 1.04 1.07 0.81
0.89 1.03 1.09 1.13 1.06 1.13 1.09 1.03 0.89
0.81 1.07 1.04 1.1 1.13 1.1 1.04 1.07 0.81
0.9 1.11 1.04 1.09 1.04 1.11 0.9
0.9 1.07 1.03 1.07 0.9
0.81 0.89 0.81
Figure 34: Relative power fraction for the U235 enrichment loading geometry.
Due to the symmetry of the core, the center fuel assembly is prone to high relative
power fractions and therefore higher peaking factors. To combat this, the center of the core
contains slightly lower enriched assemblies. An effort was made to select a 2-D loading
geometry that contained as many high enriched assemblies as possible, since the total
plutonium loading mass will play a large role in the overall cycle limit of the core.
The above arrangement produced a 2-D relative power fraction that contained a
standard deviation of just 0.107. Since reactor power level is proportional to the neutron flux,
this relatively flat relative power distribution equates to a relatively flat radial flux profile,
which will help lower the overall peaking factors throughout the core.
However, this arrangement was selected without any burnable poisons present. Since
the main purpose behind the use of burnable poisons is reactivity suppression, the presence of
any poisoned assemblies will have a marked impact on the radial flux profile. And since this
full core analysis seeks to find a comprehensive axially poisoned core, it would be inefficient
to conduct an optimization of the radial flux profile for each axial node. Furthermore, the
overall peaking factor for a core is a combination of the radial and axial peaking factors. As
will later be demonstrated, the radial peaking factor is routinely far lower than the axial
peaking factor, minimizing the importance of the radial peaking factor.
79
For these reasons, this optimization study on the radial enrichment loading geometry is
of little importance moving forward. Instead, the results demonstrated in figure 34 provide
general guidelines that will produce lower radial peaking factors. Namely, the importance of
placing assemblies with relatively lower reactivity in the center and those with higher
reactivity on the outside. But even these guidelines become difficult to enforce in light of the
full cycle length of a typical core. While one loading arrangement may be ideal for the
beginning of the cycle, the depletion of burnable poisons and the movement of control rods,
both of which significantly impact the overall reactivity of each assembly, will render any
attempts at optimizing the radial flux profile over the lifetime of the core useless. There are
simply too many variables in play to prioritize the radial flux profile.
Instead, a focus on optimizing the axial flux profile and the associated axial peaking
factors is desired. For a soluble boron-free core, this peaking factor will be the largest
determining factor behind the overall peaking factor for the core, so it should be highlighted.
In this manner, only general guidelines discovered in this radial flux profile study will be kept
in mind.
4.4.2 Full Core Axial Loading Geometry
As mentioned above, the search for a proper axial loading geometry will require
balancing several different variables at once, and adjusting for their changes through the
lifetime of the cycle. It is expected to be difficult to find a full core loading arrangement that
produces an ideal burnup profile. But this is not an optimization study, so any loading
arrangement that meets the design criteria will be accepted as a final design.
The strategy involved with discovering a suitable full core environment revolves around
balancing the reactivity compensation in such a way that limits the axial flux profile offset.
With this is mind, each different factor that influences the axial flux profile will be examined
and analyzed in relationship to every other factor. There are four main factors that influence
the axial flux profile:
1) Number of active control rods and the collective control rod movement
2) Burnable poison loading, placement, and depletion
3) U235 enrichment percentage and their collective loading geometry
4) Fission product poisoning
80
4.4.2.1 Factors influencing the axial flux profile: Number of active control rods and the
collective control rod movement
The active control rod bank in normal operations possesses the largest amount of
reactivity worth, and therefore has the largest influence on the axial flux profile. Partially
inserting such a large amount of reactivity in the core must be overcome through some
combination of factors 2-4. Furthermore, any change in the amount of excess reactivity will
result in further active control rod movement. This dynamic situation continually impacts the
axial flux profile and creates a significant challenge in maintaining a proper profile.
There are a few strategies that can be employed to overcome this strong disturbance on
the axial flux profile. The first would be to load the bottom of the core with strong burnable
poisons. If engineered properly, the poisons would contain enough negative reactivity to
match the partial insertion of control rods, and restore a proper axial flux balance. However,
this ideal situation would not last long. As the core depletes, the amount of excess reactivity is
reduced and the control rods are slowly removed to compensate. This results in a further
disturbance in the axial flux profile, and the burnable poison loading strategy that previously
worked becomes less effective.
To manage this, the burnup of poisons must match the depletion of the core, such that
the overall amount of excess reactivity that must be compensated for by the control rods is
kept relatively constant. In this manner, the control rod movement would be minimized until
the burnable poisons are depleted. Unfortunately, at this point there would be nothing to
further counter balance the partially inserted control rods, and the axial flux profile would be
adversely affected. This creates a need for burnable poisons that would last throughout the life
of the core.
Since there is a set amount of total excess reactivity that must be compensated, any
increase in burnable poisons would affect the amount of reactivity compensated for by control
rods, and thus affect the overall control rod insertion depth. Any change in control rod
insertion depth would affect the axial flux profile unless it is carefully matched by burnable
poisons. This iterative process would require a careful balance of the reactivity compensation
strategy between control rods and burnable poisons.
Additionally, several other factors play a role in control rod insertion depth, such as
fission product poisoning, shielding and shadowing effects, and other smaller reactor
transients. This creates a situation that is very difficult to optimize. Additional complications
81
introduced through axially grading the U235 enrichment percentages would further increase the
complexity.
4.4.2.2 Factors influencing the axial flux profile: Burnable poison loading, placement, and
depletion
Unlike control rods, burnable poisons are not actively controlled. Their placement
within the core is determined before operation, and cannot be altered in any way. For the
soluble boron-free core that is dependent on careful engineering of excess reactivity
compensation strategies, there is limited room for error. For example, if a large transient
knocks the control rods from their expected location in the core, the axial flux profile would
be altered. This creates locations of higher than expected flux, which would increase the rate
of burnup in that specific area and decrease the rate of burnup in a different area. Over time,
this has the potential to significantly alter the depletion characteristics within the core, and
compromise the careful and extensive work of the reactor engineers.
In other words, the soluble boron-free core is sensitive to large reactor transients, and
there is little room for error. All of this places increased importance on developing a robust
core that resists and manages the unwanted effects of reactor transients. But this engineering
must be done beforehand, and it must be reflected in the final burnable poison loading
arrangement.
4.4.2.3 Factors influencing the axial flux profile: U235 enrichment and their collective loading
arrangement
As discussed in section 4.4.1, it is necessary to carefully balance the excess reactivity
compensation strategy between control rods and burnable poisons. Altering the U235
enrichment percentage presents a different impact by reducing or increasing the overall excess
reactivity in the core. Even a simple alteration to the U235 enrichment will require reengineering the careful balance between burnable poisons and control rod movement, let alone
axially grading the U235 enrichment in individual fuel assemblies.
The natural burnup behavior in a soluble boron-free core exhibits an axial power offset
skewed toward the bottom of the core at BOC (Figure 35). If no corrections are made, this
increased neutron flux and power density at the bottom of the core leads to increased depletion
82
of U235. Eventually, this loss of fuel ultimately drives the axial offset upward, where the
presence of control rods have previously shielded the U235 in the top of the core from
depletion. This creates relatively high U235 loads at the top of the core at EOC. This effect is
driving force behind the positive axial power offset at EOC (Figure 35).
Figure 35: Natural power profile for soluble boron-free core at BOC and EOC.
83
One strategy to potentially alter this effect would be to load the top of the core with
initially low enrichments. While this strategy would negatively affect the initial axial power
offset at BOC by placing higher enrichments at the bottom of the core, it would help with this
EOC issue. So while any U235 axial enrichment scheme would solve one problem only to
exacerbate another, it could be beneficial since burnable poison schemes can be used to
control the BOC axial power offset.
84
Chapter 5 - Results
With the above considerations in mind, a search for a full core arrangement that
satisfies the design requirements can begin. This study followed an educated trial and error
basis, where a first design is selected, results are analyzed, and various iterations of possible
improvement strategies are performed. Due to the complex nature of all the physics involved
and the various strategies for improvement, there are several potential arrangements to be
performed.
Each full core design will be analyzed with respect to 3 main factors:
1) Full core pin (power) peaking factors. This is the primary concern for a soluble boron
free core due to the dependence on discrete poisons. If these are deemed acceptable,
any further implications behind a skewed axial or radial power profile could
potentially be acceptable as well.
2) Axial power offset. Any departure from the ideal chopped cosine axial power profile
represents an increased potential for egregious peaking factors. Thus any
improvement in the axial power offset represents potential improvement in the full
core peaking factors.
3) Control rod insertion depth. Since control rods represent the largest influence on the
axial power profile, examining their behavior over the life of the core will help in
determining strategies for improvement.
Consider for a moment the large degree of complexity in this search. On a macro level,
in the overall core calculation model there are 25 axial nodes, each 8cm in length. A specific
fuel assembly design (outlined in Section 4.3) must be selected for each of these 25 nodes, and
for each of the 57 fuel assemblies in the core. Thankfully, due to the symmetry of the reactor
core as outlined in Figure 36, only 9 fuel assemblies are varied across the core. Nevertheless,
since there are over 80 fuel assembly possibilities to choose from (Section 4.3), and to place in
each axial node for each fuel assembly location, there are an immense amount of total reactor
core configuration possibilities.
85
0
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Figure 36: Full core symmetry.
Beyond the immense possibilities that exist for the reactor engineer, the sheer
complexity raises questions on how best to display the relevant information. Instead of
providing the exact, detailed layout of each core configuration, a graph of the total burnable
poison loading (in grams) vs. core height (in cm) will be provided. The information presented
in this graph only displays the total amount of burnable poisons in each axial node, but does
not provide information regarding how the poisons are distributed radially, or their respective
weight percentage in each fuel pin.
For this detailed information, the appendix contains a nodal map of each core trial,
displaying the total burnable poison loading (in grams) for each fuel assembly in all 25 axial
nodes. Similarly, a graph of the average U235 enrichment vs core height (cm) will be provided.
The appendix will again provide information on how the U235 enrichment was radially
distributed.
The search for a core that satisfies the design requirements spanned 5 groups of axial
cores. Each group consisted of similar strategies with slight variations between each trial.
Subsequently, the first axially graded core in each group will be discussed in detail. The
remaining cores in each group will be discussed and analyzed together.
86
5.1 First Group of Axially Graded SMR Cores
5.1.1 First Axially Graded SMR Core
The first design employed a simple loading of Gd2O3 throughout the core, with a
majority of the Gd2O3 placed in the lower half of the core in an attempt to compensate for
partial control rod insertion. Figure 37 displays the total Gd2O3 loading and the average U235
enrichment vs core height. The total loading amount did not surpass 500 grams of Gd2O3,
which correlated to the use of nominally poisoned fuel assemblies. Furthermore, the U235
enrichment loading pattern followed the guidelines found in Section 4.4.1, with less U235 in
the lower half of the core to further combat any axial power offset.
Core Height (cm)
3.00
3.20
3.40
3.60
Average Burnup (MWD/KG)
Enrichment
3.80
4.00
4.20
4.40
4.60
4.80
5.00
200
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100
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80
1st Axial Core - BP Loading (g)
60
60
1st Axial Core - U235
Enrichment
40
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0
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50
100
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250
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350
400
450
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Gd2O3 Loading (g)
Figure 37: Burnable poison loading and average U235 enrichment vs core height for the first
core in the first group of axially graded cores.
87
Each core trial in this first group of axially graded cores only utilized the nominally
poisoned fuel assemblies from Section 4.3.1. These fuel assemblies are displayed in Figure 38,
and they attempted to provide a “flat burn” throughout the burnup profile. The idea behind the
use of these fuel assemblies was to create a poisoned core that kept a constant amount of
excess reactivity compensation. If done properly, control rod movement would be kept to a
minimum, allowing for a relatively uniform axial flux profile throughout the life of the
burnable poisons. These burnable poisons do not completely deplete until around 25
MWd/Kg, which is close to the expected lifetime of this SMR.
1.2
1.18
1.16
1.14
1.12
kinf
1.1
1.08
1.06
1.04
1.02
1
0
5
10
15
20
25
30
35
Burnup (MWd/Kg)
Figure 38: 5.0% U235 enriched “Flat burn” fuel assemblies that were employed in the first
group of axially graded cores.
Figures 39 and 40 display the average U235 enrichment and individual radial Gd2O3
loading for each axial node for this first axially graded core. Every assembly in the bottom of
the core was nominally poisoned to combat any axial power offset, while the top of the core
contained minimal poisons in the central assemblies to dampen any potential peaking factors.
The radial U235 enrichment scheme followed the guidelines found in Section 4.4.1, with the
central assemblies containing less U235. The outer ring of assemblies were non-poisoned 5.0%
U235 in an attempt to minimize the effects of leakage.
88
Average Burnable Poison Loading (grams) per Node for 1st Axial Core
0
0
0
0
9.603
9.603
9.603
0
0
0
0
0
11.32
11.32
11.32
0
0
0
0
0
11.32
11.32
11.32
0
0
0
0
0
9.603
9.603
9.603
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 9.603 9.603 9.603 0
11.32 9.603 9.603 9.603 11.32
9.603 7.545 14.4 7.545 9.603
9.603 14.4 7.545 14.4 9.603
9.603 7.545 14.4 7.545 9.603
11.32 9.603 9.603 9.603 11.32
0 9.603 9.603 9.603 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 11.32 11.32 11.32 0
11.32 11.32 11.32 11.32 11.32
11.32 7.545 14.4 7.545 11.32
11.32 14.4 9.603 14.4 11.32
11.32 7.545 14.4 7.545 11.32
11.32 11.32 11.32 11.32 11.32
0 11.32 11.32 11.32 0
0
0
0
Node 7: 48-56 cm
0
0
0
0 11.32 11.32 11.32 0
11.32 11.32 11.32 11.32 11.32
11.32 7.545 14.4 7.545 11.32
11.32 14.4 9.603 14.4 11.32
11.32 7.545 14.4 7.545 11.32
11.32 11.32 11.32 11.32 11.32
0 11.32 11.32 11.32 0
0
0
0
Node 10: 72-80 cm
0
0
0
0 9.603 9.603 9.603 0
11.32 4.801 4.801 4.801 11.32
4.801 9.603 11.32 9.603 4.801
4.801 11.32 4.801 11.32 4.801
4.801 9.603 11.32 9.603 4.801
11.32 4.801 4.801 4.801 11.32
0 9.603 9.603 9.603 0
0
0
0
Node 13: 96-104 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
9.603
9.603
9.603
0
0
0
0
0
0
0
0
9.603
9.603
9.603
0
0
11.32
11.32
11.32
0
0
0
0
0
0
0
0
11.32
11.32
11.32
0
0
11.32
11.32
11.32
0
0
0
0
0
0
0
0
9.603
9.603
9.603
0
0
9.603
9.603
9.603
0
0
0
0
0
0
0
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 9.603 9.603 9.603 0
11.32 11.32 11.32 11.32 11.32
11.32 7.545 14.4 7.545 11.32
11.32 14.4 7.545 14.4 11.32
11.32 7.545 14.4 7.545 11.32
11.32 11.32 11.32 11.32 11.32
0 9.603 9.603 9.603 0
0
0
0
Node 5: 32-40 cm
0
0
0
0 11.32 11.32 11.32 0
11.32 11.32 11.32 11.32 11.32
11.32 11.32 14.4 11.32 11.32
11.32 14.4 9.603 14.4 11.32
11.32 11.32 14.4 11.32 11.32
11.32 11.32 11.32 11.32 11.32
0 11.32 11.32 11.32 0
0
0
0
Node 8: 56-64 cm
0
0
0
0 9.603 9.603 9.603 0
11.32 9.603 9.603 9.603 11.32
9.603 7.545 11.32 7.545 9.603
9.603 11.32 7.545 11.32 9.603
9.603 7.545 11.32 7.545 9.603
11.32 9.603 9.603 9.603 11.32
0 9.603 9.603 9.603 0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 4.801 4.801 0
7.545 4.801 4.801 4.801 7.545
4.801 9.603 11.32 9.603 4.801
4.801 11.32 4.801 11.32 4.801
4.801 9.603 11.32 9.603 4.801
7.545 4.801 4.801 4.801 7.545
0 4.801 4.801 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
9.603
9.603
9.603
0
0
0
0
0
0
0
0
11.32
11.32
11.32
0
0
11.32
11.32
11.32
0
0
0
0
0
0
0
0
11.32
11.32
11.32
0
0
9.603
9.603
9.603
0
0
0
0
0
0
0
0
9.603
9.603
9.603
0
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 11.32 11.32 11.32 0
11.32 11.32 11.32 11.32 11.32
11.32 7.545 14.4 7.545 11.32
11.32 14.4 9.603 14.4 11.32
11.32 7.545 14.4 7.545 11.32
11.32 11.32 11.32 11.32 11.32
0 11.32 11.32 11.32 0
0
0
0
Node 6: 40-48 cm
0
0
0
0 11.32 11.32 11.32 0
11.32 11.32 11.32 11.32 11.32
11.32 7.545 14.4 7.545 11.32
11.32 14.4 9.603 14.4 11.32
11.32 7.545 14.4 7.545 11.32
11.32 11.32 11.32 11.32 11.32
0 11.32 11.32 11.32 0
0
0
0
Node 9: 64-72 cm
0
0
0
0 9.603 9.603 9.603 0
11.32 9.603 9.603 9.603 11.32
9.603 7.545 11.32 7.545 9.603
9.603 11.32 7.545 11.32 9.603
9.603 7.545 11.32 7.545 9.603
11.32 9.603 9.603 9.603 11.32
0 9.603 9.603 9.603 0
0
0
0
Node 12: 88-96 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
11.32
11.32
11.32
0
0
0
0
0
11.32
11.32
11.32
0
0
0
0
0
9.603
9.603
9.603
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 39: Average burnable poison loading (grams) per node for the first axial core.
89
Fuel Assembly U235 Enrichment per Node for 1st Axial Core
4.95
4.95
4.95
4.95
3.50
3.50
3.50
4.95
4.95
3.50
3.00
3.00
3.00
3.50
4.95
4.95
4.95
4.95
4.95
3.50
3.50
3.50
4.95
4.95
3.50
3.00
3.00
3.00
3.50
4.95
4.95
4.95
4.95
4.95
3.50
3.50
3.50
4.95
4.95
3.50
3.00
3.00
3.00
3.50
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
Node 1: 0-8 cm
4.95 4.95 4.95
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
4.95 4.95 4.95
Node 4: 24-32 cm
4.95 4.95 4.95
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
4.95 4.95 4.95
Node 7: 48-56 cm
4.95 4.95 4.95
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
4.95 4.95 4.95
Node 10: 72-80 cm
4.95 4.95 4.95
4.50 4.00 4.50
3.50 3.50 3.50
3.00 4.00 3.00
4.00 3.00 4.00
3.00 4.00 3.00
3.50 3.50 3.50
4.50 4.00 4.50
4.95 4.95 4.95
Node 13: 96-104 cm
4.95 4.95 4.95
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
4.95 4.95 4.95
Node 16: 120-128 cm
4.95 4.95 4.95
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
4.95 4.95 4.95
Node 19: 144-152 cm
4.95 4.95 4.95
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
4.95 4.95 4.95
Node 22: 168-176 cm
4.95 4.95 4.95
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
4.95 4.95 4.95
4.95
3.50
3.00
3.00
3.00
3.50
4.95
4.95
3.50
3.50
3.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
3.50
3.50
3.50
4.95
4.95
3.50
3.00
3.00
3.00
3.50
4.95
4.95
3.50
3.00
3.00
3.00
3.50
4.95
4.95
3.50
3.50
3.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
3.50
3.50
3.50
4.95
4.95
3.50
3.00
3.00
3.00
3.50
4.95
4.95
3.50
3.00
3.00
3.00
3.50
4.95
4.95
3.50
3.50
3.50
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
4.95
4.00
3.50
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
Node 2: 8-16 cm
4.95 4.95 4.95
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
4.95 4.95 4.95
Node 5: 32-40 cm
4.95 4.95 4.95
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
4.95 4.95 4.95
Node 8: 56-64 cm
4.95 4.95 4.95
4.00 4.00 4.00
3.50 3.50 3.50
3.50 3.50 3.50
3.50 3.00 3.50
3.50 3.50 3.50
3.50 3.50 3.50
4.00 4.00 4.00
4.95 4.95 4.95
Node 11: 80-88 cm
4.95 4.95 4.95
4.00 3.50 4.00
3.50 3.50 3.50
3.00 4.00 3.00
4.00 3.00 4.00
3.00 4.00 3.00
3.50 3.50 3.50
4.00 3.50 4.00
4.95 4.95 4.95
Node 14: 104-112 cm
4.95 4.95 4.95
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
4.95 4.95 4.95
Node 17: 128-136 cm
4.95 4.95 4.95
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
4.95 4.95 4.95
Node 20: 152-160 cm
4.95 4.95 4.95
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
4.95 4.95 4.95
Node 23: 176-184 cm
4.95 4.95 4.95
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
4.95 4.95 4.95
4.95
3.50
3.00
3.00
3.00
3.50
4.95
4.95
3.50
3.50
3.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
3.50
3.50
3.50
4.95
4.95
3.50
3.00
3.00
3.00
3.50
4.95
4.95
3.50
3.50
3.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
3.50
3.50
3.50
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.00
3.50
4.00
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
Node 3: 16-24 cm
4.95 4.95 4.95
4.95 3.50 3.50 3.50 4.95
3.50 3.00 3.00 3.00 3.50
3.00 2.50 3.00 2.50 3.00
3.00 3.00 2.50 3.00 3.00
3.00 2.50 3.00 2.50 3.00
3.50 3.00 3.00 3.00 3.50
4.95 3.50 3.50 3.50 4.95
4.95 4.95 4.95
Node 6: 40-48 cm
4.95 4.95 4.95
4.95 3.50 3.50 3.50 4.95
3.50 3.00 3.00 3.00 3.50
3.00 2.50 3.00 2.50 3.00
3.00 3.00 2.50 3.00 3.00
3.00 2.50 3.00 2.50 3.00
3.50 3.00 3.00 3.00 3.50
4.95 3.50 3.50 3.50 4.95
4.95 4.95 4.95
Node 9: 64-72 cm
4.95 4.95 4.95
4.95 4.50 4.00 4.50 4.95
4.00 4.00 4.00 4.00 4.00
4.00 3.50 3.50 3.50 4.00
4.00 3.50 3.00 3.50 4.00
4.00 3.50 3.50 3.50 4.00
4.00 4.00 4.00 4.00 4.00
4.95 4.50 4.00 4.50 4.95
4.95 4.95 4.95
Node 12: 88-96 cm
4.95 4.95 4.95
4.95 4.50 4.00 4.50 4.95
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
4.95 4.50 4.00 4.50 4.95
4.95 4.95 4.95
Node 15: 112-120 cm
4.95 4.95 4.95
4.95 4.50 4.00 4.50 4.95
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
4.95 4.50 4.00 4.50 4.95
4.95 4.95 4.95
Node 18: 136-144 cm
4.95 4.95 4.95
4.95 4.50 4.00 4.50 4.95
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
4.95 4.50 4.00 4.50 4.95
4.95 4.95 4.95
Node 21: 160-168 cm
4.95 4.95 4.95
4.95 4.50 4.00 4.50 4.95
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
4.95 4.50 4.00 4.50 4.95
4.95 4.95 4.95
Node 24 and 25: 184-200 cm
4.95 4.95 4.95
4.95 4.50 4.00 4.50 4.95
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
4.95 4.50 4.00 4.50 4.95
4.95 4.95 4.95
Figure 40: Fuel assembly U235 enrichment per node for the first axial core.
4.95
3.50
3.50
3.50
4.95
4.95
4.95
4.95
4.95
3.50
3.50
3.50
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
90
This first axially graded core employed the simple strategy outlined above, which was
derived from the reactor’s expected behavior under soluble boron-free conditions. The actual
behavior of the reactor will drive further iterations of this first basic strategy. In sum, this
strategy employed the following ideas:
•
Nominal poisoning toward the bottom half of the core, with partial poisoning in the
top to combat peaking factors. Gd2O3 loading did not exceed 500 grams in any node
•
Low enriched U235 near the bottom of the core to combat axial power offset, with
higher enriched nodes at the top for a longer lifetime
•
Radial U235 enrichment loading that follows general guidelines from section 4.1
•
Use of “flat burn” fuel assemblies to maintain consistent excess reactivity
compensation
•
Non poisoned 4.95% enriched assemblies at the outer edge of the core to combat
neutron leakage
Figures 41 and 42 show the results from depleting this first core to 30 MWd/Kg. The
axial power profile demonstrates the effectiveness of loading burnable poisons in the bottom
of the core; at BOC the axial power offset was surprisingly positive 0.35. However this data is
deceptive since the control rods are 100% inserted at BOC, and are not withdrawn until 5
MWd/Kg, revealing a deficit of excess reactivity compensation. And once they begin to be
withdrawn, the axial offset sharply dives, settling at -0.3 before continuing a slow descent
until 15 MWd/Kg. This clearly demonstrates the strong effect partial control rod insertion has
on the axial offset.
Due to this lack of sufficient excess reactivity compensation, the reactor is supercritical
until 5 MWd/Kg. This is clearly unacceptable, and later full core trials will have to incorporate
more excess reactivity compensation or less U235.
At around 15 MWd/Kg, the control rods begin to steadily withdraw, signifying a
gradual decline in the burnable poison effectiveness until they are all depleted. At this time,
the axial offset begins to steadily move upward in response to the control rod withdrawal. At
the EOC, the top of the core contains relatively high U235 enriched assemblies due to shielding
91
and shadowing from the presence of control rods. This continues to drive the axial offset
upward, ending at a very high value of 0.8.
1
0.8
0.9
0.6
0.8
0.4
0.7
0.2
0.6
0
0.5
0
5
10
15
20
25
30
-0.2
0.4
-0.4
0.3
-0.6
0.2
Axial Offset (1st Axial Core)
-0.8
0.1
Control Rod Insertion (1st Axial Core)
-1
Control Rod Insertion Percentage
Axial Power Offset
1
0
Burnup (MWd/Kg)
Figure 41: Axial offset and control rod insertion vs burnup for the first core.
4.5
Maximum Peaking Factor
4
3.5
3
2.5
2
1st Axial Core
1.5
Soluble Boron Core
1
0
5
10
15
20
25
30
Burnup (MWD/Kg)
Figure 42: Maximum total peaking factor vs burnup for the first core and soluble boron core.
92
Surprisingly, the overall peaking factors for this first core do not reflect the strong axial
offset. While the peaking factors start high, by the time the control rods begin to be withdrawn
they settle at around 2.6, which is actually lower than a core running soluble boron. While this
result is surprising, it must be taken with a grain of salt due to the fact that the control rods did
not begin to be withdrawn from their fully inserted position until 5 MWd/Kg. This signifies a
lack of necessary excess reactivity compensation, as the control rods were completely inserted
and still could not bring the multiplication factor to 1. In other words, the core was
supercritical until 5 MWd/Kg, reflecting unrealistic scenarios.
5.1.2 Further Axially Graded SMR cores from the First Group
The above detailed discussion involved the first core in the first group of cores. Axial
cores 1 through 7 comprise this first group. From the results we can identify the need for
increased reactivity suppression at BOC, and a better strategy for combating the long term rise
in axially power from relatively highly enriched assemblies. In this respect, the 7 other
relevant reactor cores from this first group are presented below.
Figure 43 shows the variations in average axial burnable poison loading for each
subsequent core. For this first group of cores, the total Gd2O3 loading in each node did not
exceed 500 grams. Instead, to address the need for additional excess reactivity suppression at
BOC, more burnable poisons were loaded throughout the core.
93
200
180
160
1st Axial Core
2nd Axial Core
3rd Axial Core
4th Axial Core
5th Axial Core
6th Axial Core
7th Axial Core
8th Axial Core
Core Height (cm)
140
120
100
80
60
40
20
0
0
50
100
150
200
250
300
350
400
450
500
Gd2O3 Loading (g)
Figure 43: Burnable poison loading vs core height for all cores in the first group of axially
graded cores.
Figure 44 shows the differences in average U235 enrichment in each axial core. As a
second means of reducing initial excess reactivity, subsequent cores were loaded with lower
U235 enriched assemblies, ultimately lowering the total amount of fissile material. While this
strategy helps reduce the total reactivity compensation needed at BOC, it will also shorten
core lifetime. This might prompt a return to higher enriched assemblies, but it is important to
see what role the various enrichments play on the axial offset and the maximum peaking
factors within the core.
94
200
180
160
Core Height (cm)
140
1st Axial Core
120
2nd Axial Core
100
3rd Axial Core
80
4th Axial Core
60
5th Axial Core
40
6th Axial Core
7th Axial Core
20
8th Axial Core
0
2.5
3
3.5
4
4.5
5
Average Burnup (MWD/KG)
Enrichment
Figure 44: Average U235 enrichment vs core height for the first group of axially graded cores.
Figures 45 and 46 show the axial power offset and control rod insertion percentage vs
burnup for each axial core. The axial offset graphs demonstrate the inability of the above cores
to adequately reduce the initial excess reactivity; the control rods do not begin to be
withdrawn until 2-4 MWd/Kg in each core. The only exception is the 2nd core, which is
identical to the 1st core except for 300 grams of Gd2O3 loaded in each axial node in the top
half of the core.
Unfortunately this had a side effect of suppressing the neutron flux in the top half of the
core and further exacerbating the axial offset at the BOC. This further increased the shielding
and shadowing effects and produced a slightly more severe axial offset toward the top of the
core at EOC. This demonstrates the interplay between each variable. Any adjustment in poison
loading or enrichment will affect the overall performance of the core in a number of different
ways.
95
1
0.8
0.6
Axial Power Offset
0.4
0.2
0
0
5
10
15
20
25
-0.2
1st Axial Core
-0.4
3rd Axial Core
30
2nd Axial Core
4th Axial Core
-0.6
5th Axial Core
6th Axial Core
-0.8
7th Axial Core
-1
8th Axial Core
Burnup (MWd/Kg)
Figure 45: Axial power offset vs burnup for the first group of axially graded cores.
1
Control Rod Insertion Percentage
0.9
1st Axial Core
0.8
2nd Axial Core
0.7
3rd Axial Core
4th Axial Core
0.6
5th Axial Core
6th Axial Core
0.5
7th Axial Core
0.4
8th Axial Core
0.3
0.2
0.1
0
0
5
10
15
20
25
Burnup (MWd/Kg)
Figure 46: Control rod insertion vs burnup for the first group of axially graded cores.
30
96
Figure 47 demonstrates the peaking factors for this first group of cores. Interestingly,
the severe axial offset did not impact the peaking factors in a completely egregious way.
However, since the control rods were not withdrawn until 2-3 MWd/Kg, the performance of
these cores must be taken with a grain of salt. These cores had the control rods completely
inserted at BOC, while the core was in its most reactive state, which severely impacted the
axial offset and thus the peaking factors as well. Until the initial excess reactivity can be
brought under control, these results should not be taken seriously. In fact, as soon as the
control rods began to be withdrawn, the peaking factors sharply rose.
The only exception would be core #2, which does show promise with its relatively low
peaking factors even though they steadily rise toward the EOC. Nevertheless, it would be
difficult for any reactor engineer to accept a design with such a highly skewed axial offset,
even if the overall peaking factors somehow remain relatively small.
6
1st Axial Core
2nd Axial Core
5.5
3rd Axial Core
Maximum Peaking Factor
5
4th Axial Core
5th Axial Core
4.5
6th Axial Core
7th Axial Core
4
8th Axial Core
3.5
3
2.5
2
1.5
1
0
5
10
15
20
25
30
Burnup (MWd/Kg)
Figure 47: Maximum total peaking factor vs burnup for the first group of axially graded cores.
97
5.2 Second Group of Axially Graded SMR Cores
5.2.1 First Core from Second Group of Axially Graded SMR cores
A prevailing theme from the first group of cores included a lack of initial excess
reactivity along with difficulty in minimizing the axial offset throughout the middle of cycle
(MOC) and EOC. To alleviate these issues, this group of cores employs the following
strategies:
•
Nominal poisoning throughout the core, with increased poisons at the bottom of the
core and a reduced percentage of burnable poisons at the top of the core. Gd2O3
loading did not exceed 500 grams in any node
•
Low enriched U235 near the bottom of the core to combat axial power offset, with
higher enriched assemblies at the top for a longer lifetime
•
Radial U235 enrichment loading that follows general guidelines from section 4.1
•
Use of “flat burn” fuel assemblies to maintain consistent excess reactivity
compensation
•
Non poisoned 4.95% enriched assemblies at the outer edge of the core to combat
neutron leakage
The only significant changes from the first group of cores is a change of strategy by
placing limited to no burnable poisons in the top of the core. But each node still does not
contain more than 500 grams of Gd2O3 and the “flat burn” fuel assemblies are still exclusively
used. Figure 48 displays the total Gd2O3 loading and the average U235 enrichment vs core
height, and Figures 49 and 50 display the individual poisoning in each assembly for each axial
node, and the U235 enrichment in each assembly per node, respectively.
98
Core Height (cm)
3.00
3.20
3.40
3.60
Average Burnup (MWD/KG)
Enrichment
3.80
4.00
4.20
4.40
4.60
4.80
5.00
200
200
180
180
160
160
140
140
120
120
100
100
80
80
9th Axial Core - BP Loading (g)
60
9th Axial Core - U235 Enrichment
60
40
40
20
20
0
0
0
50
100
150
200
250
300
350
400
450
500
Gd2O3 Loading (g)
Figure 48: Burnable poison loading and average U235 enrichment vs core height for the 9th
core.
99
Average Burnable Poison Loading (grams) per Node for 9th Axial Core
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
11.32
9.603
11.32
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 49: Average burnable poison loading (grams) per node for the 9th core.
0
11.32
9.603
11.32
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
100
Fuel Assembly U235 Enrichment per Node for 9th Axial Core
4.95
4.95
4.95
4.95
2.50
3.00
2.50
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
3.00
2.50
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
3.00
2.50
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.95
4.95
4.95
3.00
3.00
3.00
4.95
4.95
3.00
2.50
2.50
2.50
3.00
4.95
4.95
4.95
4.95
4.95
3.00
3.00
3.00
4.95
4.95
3.00
2.50
2.50
2.50
3.00
4.95
Node 1: 0-8 cm
4.95 4.95 4.95
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
4.95 4.95 4.95
Node 4: 24-32 cm
4.95 4.95 4.95
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
4.95 4.95 4.95
Node 7: 48-56 cm
4.95 4.95 4.95
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
4.95 4.95 4.95
Node 10: 72-80 cm
4.95 4.95 4.95
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
4.95 4.95 4.95
Node 13: 96-104 cm
4.95 4.95 4.95
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
4.95 4.95 4.95
Node 16: 120-128 cm
4.95 4.95 4.95
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
4.95 4.95 4.95
Node 19: 144-152 cm
4.95 4.95 4.95
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
4.95 4.95 4.95
Node 22: 168-176 cm
4.95 4.95 4.95
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
4.95 4.95 4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
2.50
3.00
2.50
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
2.50
3.00
2.50
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
2.50
3.00
2.50
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.00
4.00
4.00
4.95
4.95
3.00
2.50
2.50
2.50
3.00
4.95
4.95
3.00
3.00
3.00
4.95
4.95
3.00
2.50
2.50
2.50
3.00
4.95
4.95
3.00
3.00
3.00
4.95
4.95
4.95
4.95
4.95
2.50
3.00
2.50
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
3.00
2.50
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
3.00
2.50
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
3.50
3.50
3.50
4.95
4.95
3.50
3.00
3.00
3.00
3.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
3.00
3.00
3.00
4.95
4.95
3.00
2.50
2.50
2.50
3.00
4.95
4.95
4.95
4.95
4.95
3.00
3.00
3.00
4.95
4.95
3.00
2.50
2.50
2.50
3.00
4.95
4.95
4.95
4.95
4.95
4.95
4.95
Node 2: 8-16 cm
4.95 4.95 4.95
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
4.95 4.95 4.95
Node 5: 32-40 cm
4.95 4.95 4.95
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
4.95 4.95 4.95
Node 8: 56-64 cm
4.95 4.95 4.95
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
4.95 4.95 4.95
Node 11: 80-88 cm
4.95 4.95 4.95
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
4.95 4.95 4.95
Node 14: 104-112 cm
4.95 4.95 4.95
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
4.95 4.95 4.95
Node 17: 128-136 cm
4.95 4.95 4.95
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
4.95 4.95 4.95
Node 20: 152-160 cm
4.95 4.95 4.95
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
4.95 4.95 4.95
Node 23: 176-184 cm
4.95 4.95 4.95
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
4.95 4.95 4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
2.50
3.00
2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
3.00
2.50
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
2.50
3.00
2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
3.00
2.50
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
2.50
3.00
2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
3.00
2.50
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
3.50
3.00
3.00
3.00
3.50
4.95
4.95
3.50
3.50
3.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
3.00
3.00
3.00
4.95
4.95
3.00
2.50
2.50
2.50
3.00
4.95
4.95
3.00
3.00
3.00
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
3.00
3.00
3.00
4.95
4.95
3.00
2.50
2.50
2.50
3.00
4.95
4.95
3.00
3.00
3.00
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
3.00
3.00
3.00
4.95
Node 3: 16-24 cm
4.95 4.95 4.95
4.95 2.50 3.00 2.50 4.95
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
4.95 2.50 3.00 2.50 4.95
4.95 4.95 4.95
Node 6: 40-48 cm
4.95 4.95 4.95
4.95 2.50 3.00 2.50 4.95
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
4.95 2.50 3.00 2.50 4.95
4.95 4.95 4.95
Node 9: 64-72 cm
4.95 4.95 4.95
4.95 2.50 3.00 2.50 4.95
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
4.95 2.50 3.00 2.50 4.95
4.95 4.95 4.95
Node 12: 88-96 cm
4.95 4.95 4.95
4.95 4.00 4.00 4.00 4.95
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
4.95 4.00 4.00 4.00 4.95
4.95 4.95 4.95
Node 15: 112-120 cm
4.95 4.95 4.95
4.95 4.00 4.00 4.00 4.95
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
4.95 4.00 4.00 4.00 4.95
4.95 4.95 4.95
Node 18: 136-144 cm
4.95 4.95 4.95
4.95 3.00 3.00 3.00 4.95
3.00 2.50 2.50 2.50 3.00
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
3.00 2.50 2.50 2.50 3.00
4.95 3.00 3.00 3.00 4.95
4.95 4.95 4.95
Node 21: 160-168 cm
4.95 4.95 4.95
4.95 3.00 3.00 3.00 4.95
3.00 2.50 2.50 2.50 3.00
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
3.00 2.50 2.50 2.50 3.00
4.95 3.00 3.00 3.00 4.95
4.95 4.95 4.95
Node 24 and 25: 184-200 cm
4.95 4.95 4.95
4.95 3.00 3.00 3.00 4.95
3.00 2.50 2.50 2.50 3.00
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
3.00 2.50 2.50 2.50 3.00
4.95 3.00 3.00 3.00 4.95
4.95 4.95 4.95
Figure 50: Fuel assembly U235 enrichment per node for the 9th core.
4.95
2.50
3.00
2.50
4.95
4.95
4.95
4.95
4.95
2.50
3.00
2.50
4.95
4.95
4.95
4.95
4.95
2.50
3.00
2.50
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.95
4.95
4.95
3.00
3.00
3.00
4.95
4.95
4.95
4.95
4.95
3.00
3.00
3.00
4.95
4.95
4.95
4.95
4.95
3.00
3.00
3.00
4.95
4.95
4.95
4.95
101
This core did not see any significant improvement. Figure 51 shows the axial power
offset and the control rod insertion percentage vs burnup. We can see from Figure 51 that the
control rods do not begin to be withdrawn until 2-3 MWd/Kg, indicating a supercritical core
and a lack of necessary excess reactivity compensation. Furthermore, the trend in axial offset
continues to rapidly swing significantly below 0 before slowly moving up as the control rods
are withdrawn, demonstrating a further lack of poisoning at the bottom of the core.
Axial Power Offset
0.8
0.9
0.6
0.8
0.4
0.7
0.2
0.6
0.5
0
0
5
10
15
20
25
30
-0.2
0.4
-0.4
0.3
-0.6
0.2
-0.8
Axial Offset (9th Axial Core)
Control Rod Insertion Percentage
1
1
0.1
Control Rod Insertion (9th Axial Core)
-1
Burnup (MWd/Kg)
0
Figure 51: Axial offset and control rod insertion percentage vs burnup for the 9th core.
The maximum peaking factor vs burnup is shown in Figure 52, where similar trends
from the first group continue. The lack of control rod withdrawal until 2-3 MWd/Kg
demonstrates unfeasible core conditions, and once again as soon as they begin to be
withdrawn we see a sharp rise in peaking factors. Interestingly, they are still in the same
ballpark as a regular core with soluble boron, until the EOC where they gradually rise.
Nevertheless, this specific design is unacceptable due to a supercritical state at BOC.
Additionally, while the peaking factors appear to be low enough to pass design
requirements, the axial offset would still be less than ideal. This is because concentrating more
102
than 70-80% of your total core power in a handful of axial nodes would make the core more
susceptible to transients that would produce very high peaking factors. If all potential
operating conditions are examined closely, a core with a strong axial offset would be expected
to perform worse than a core with soluble boron and one with a proper axial power profile.
This will be examined in more detail.
4.5
Maximum Peaking Factor
4
3.5
3
2.5
2
9th Axial Core
1.5
Soluble Boron Core
1
0
5
10
15
20
25
30
Burnup (MWd/Kg)
Figure 52: Maximum total peaking factor vs burnup for the 9th core.
5.2.2 Further Axially Graded SMR cores from the Second Group
Since all poisons are burned up by the EOC, it seems as though the only hope for
controlling the axial offset at the EOC is to contain the axial offset at the BOC. This would
limit any egregious shielding and shadowing effects that lead to relatively high enriched
assemblies near the top at EOC. In this respect, it is absolutely imperative to control the axial
offset at BOC.
Since the first core in this second group still displayed continued trends in the axial
offset from the first group, subsequent trials in this second group will place low enriched
assemblies at the top of the core with high enriched assemblies at the bottom, to further
influence the axial offset at BOC. Furthermore, low enriched assemblies at the top of the core
103
would reduce the effects the shielding and shadowing effects mentioned above. Each node
still contains a nominal poison load with no individual node containing more than 700 grams
of Gd2O3. The “flat burn” fuel assemblies are still exclusively used, in a continued attempt to
provide a consistent amount of excess reactivity compensation. If these efforts continue to fail,
other strategies will have to be employed.
Figure 53 displays the Gd2O3 load vs core height for each of the 5 axially graded cores
in this group. All 5 cores contain no burnable poisons at the top of the core, and varying
amounts at the bottom, representing different attempts to provide both sufficient excess
reactivity compensation, and to manage the axial power profile. Once again, no core possesses
more than 700 grams of Gd2O3 per axial node.
200
180
160
9th Axial Core
Core Height (cm)
140
10th Axial Core
120
11th Axial Core
100
12th Axial Core
80
13th Axial Core
60
40
20
0
0
100
200
300
400
500
600
700
Gd2O3 Loading (g)
Figure 53: Burnable poison loading vs core height for the 2nd group of axially graded cores.
Each core’s U235 enrichment vs core height is provided in Figure 54. Here we see the
other adjustment by placing low enriched nodes at the top of the core with high enriched
nodes at the bottom. While this seems counter intuitive if we are seeking to manage the axial
power profile at BOC (when it has consistently been too high), it is likely necessary from an
EOC perspective, where the shielding and shadowing effects produce higher enriched U235 at
104
the top, driving the axial flux profile toward the top. And since the only mechanism the
engineer has for long-term control of the axial flux profile is U235 enrichment (all poisons will
have depleted by EOC), placing low enriched nodes at the top is justified. It must be counterbalanced by high enriched nodes at the bottom to provide a contrast between the top and the
bottom of the core.
200
180
9th Axial Core
160
10th Axial Core
Core Height (cm)
140
11th Axial Core
120
100
12th Axial Core
80
13th Axial Core
60
40
20
0
2.50
3.00
3.50
4.00
4.50
5.00
Average Burnup (MWD/KG)
Enrichment
Figure 54: Average U235 enrichment vs core height for the 2nd group of axially graded cores.
The axial power offset and control rod insertion vs burnup for each core is displayed in
Figures 55 and 56. Here we can see how, once again, there is not enough initial excess
reactivity. Removing poisons from the top of the core was hopefully going to be offset by
lowering the enrichment at the top. However it seems that is not enough, and more reactivity
compensation must be found either through poisons or additional control rods.
Once again there is a general trend of very high initial axial offset (around 0.2-0.4) until
the control rods begin to be withdrawn. At this point it sharply dives to around -0.5 and slowly
rises as the core continues to deplete, ending around 0.6. This large swing is unacceptable, and
there must be additional reactivity compensation to allow for a non-supercritical core at BOC.
105
1
0.8
0.6
Axial Power Offset
0.4
0.2
0
0
5
10
15
20
25
30
-0.2
-0.4
9th Axial Core
10th Axial Core
-0.6
11th Axial Core
-0.8
12th Axial Core
-1
13th Axial Core
Burnup (MWd/KG)
Figure 55: Axial power offset vs burnup for the 2nd group of axially graded cores.
1
8th Axial Core
Insertion Percentage
0.9
9th Axial Core
0.8
10th Axial Core
0.7
11th Axial Core
12th Axial Core
0.6
13th Axial Core
0.5
0.4
0.3
0.2
0.1
0
0
5
10
15
20
25
Burnup (MWd/KG)
Figure 56: Control rod insertion for the second group of axially graded cores.
30
106
The control rod insertion also displays how cores 11 and 12 produce inconsistent
control rod movement as they both see increased control rod insertion from 5-15 MWd/Kg.
The likely culprit are poisons that provide a lot of initial reactivity compensation, but quickly
burn out, placing additional burden on control rods for excess reactivity compensation. This
type of fuel assembly was outlined in Section 4.3.2, and the specific fuel assemblies used in
cores 11 and 12 are shown in Figure 57.
1.3
1.2
Kinf
1.1
1
0.9
0.8
0.7
0
5
10
15
20
25
Burnup (MWd/Kg)
Figure 57: kinf vs burnup for fuel assemblies used in cores 11 and 12.
Maximum peaking factors for this 2nd group of axially graded cores is shown in Figure
58. Except for cores 11 and 12, they behave in a similar fashion to the first group of axially
graded cores. For cores 11 and 12, we see a very large spike in peaking factors, coinciding
with the increased control rod insertion around 15 MWd/Kg.
While the control rod movement coincides nicely with the spike, there is another factor
at play that has a larger influence on these egregious peaking factor spikes. One should note
that the control rods were inserted to a similar depth at BOC, yet without such massive
peaking factors. However, at BOC the large concentration of Gd2O3 suppressed the neutron
flux at bottom of the core, where there are no control rods to suppress the neutron flux. The
Gd2O3 plays the role of control rods, helping to suppress the flux. However, they quickly burn
107
out, which coincidentally results in additional control rod insertion. Around 15 MWd/Kg, all
the Gd2O3 has been depleted, and the bottom of the core contains no active reactivity
suppression – leading to the peaking factor spike. Later axially graded cores should not
employ quickly depleting burnable poisons at the bottom of the core to avoid this effect.
13
8th Axial Core
Maximum Peaking Factor
11
9th Axial Core
10th Axial Core
9
11th Axial Core
12th Axial Core
13th Axial Core
7
5
3
1
0
5
10
15
20
25
30
Burnup (MWd/Kg)
Figure 58: Maximum total peaking factor vs burnup for the second group of cores.
5.3 Third Group of Axially Graded SMR Cores
5.3.1 First Core from Third Group of Axially Graded SMR Cores
The first two groups of axially graded cores suffered from a common problem: not
enough initial excess reactivity compensation and not enough reactivity compensation at the
bottom of the core to combat the axial power offset. The axial power offset in specific
continued to be very low until around 15 MWd/Kg, when the control rods are far enough
withdrawn to produce a slow, steady rise. To combat these effects, and to investigate the limits
of effectiveness for burnable poisons placed in the bottom of the core, this 3rd group of axially
graded control rods explored the idea of significant burnable poison loading at the bottom of
the core. The overall strategy employed for this group of cores is summarized below:
108
•
Nominal poisoning throughout the middle at top of the core, with significant poison
loading at the bottom of the core. The idea is to both provide additional excess
reactivity compensation, and to combat the axial power offset.
•
High enriched U235 at the bottom and top of the core for a longer core lifetime. The
massive loading of burnable poisons should offset this increase in enrichment.
•
Radial U235 enrichment loading that follows general guidelines from section 4.1
•
Non poisoned 4.95% enriched assemblies at the outer edge of the core to combat
neutron leakage
The specific fuel assemblies used in this group of cores provide strong initial reactivity
compensation with either a slow or medium rate of depletion. They come from Section 4.3.3,
and Figure 59 displays kinf vs burnup for these fuel assemblies.
1.3
1.2
1.1
Kinf
1
0.9
0.8
0.7
0.6
0.5
0.4
0
5
10
15
20
25
30
Burnup (MWd/Kg)
Figure 59: kinf vs burnup for fuel assemblies used in the third group of cores.
Figure 60 shows the burnable poison loading and the average U235 enrichment vs core
height for the 14th axially graded core – the first one from this 3rd group of axially graded
cores. There are a few notable changes. First, there is a nominal level of poisoning throughout
the core, with a very large increase in poisons in the bottom 3 nodes, which contain just under
2000 grams of Gd2O3 per node. Second, the U235 enrichment in each assembly has been
109
increased; most notably in the top of the core which now contains higher enriched assemblies.
The goal is to increase core lifetime, which is now thought possible through the increased
Gd2O3 loading throughout the core.
Core Height (cm)
3.00
3.20
3.40
3.60
Average Burnup (MWD/KG)
Enrichment
3.80
4.00
4.20
4.40
4.60
4.80
5.00
200
200
180
180
160
160
140
140
120
120
100
100
80
14th Axial Core - BP Loading (g)
60
14th Axial Core - U235 Enrichment
80
60
40
40
20
20
0
0
200
400
600
800
1000
1200
1400
1600
1800
0
2000
Gd2O3 Loading (g)
Figure 60: Burnable poison loading and average U235 enrichment vs core height for the first
core in the third group of axially graded cores.
Figures 61 and 62 show the individual Gd2O3 loading and U235 enrichment for each
assembly in each axial node.
110
Average Burnable Poison Loading (grams) per Node for 14th Axial Core
0
0
0
0
32.92
32.92
32.92
0
0
0
0
0
32.92
32.92
32.92
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 32.92 32.92 32.92 0
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
0 32.92 32.92 32.92 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 32.92 32.92 32.92 0
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
0 32.92 32.92 32.92 0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 19: 144-152 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
32.92
32.92
32.92
0
0
0
0
0
0
0
0
32.92
32.92
32.92
0
0
32.92
32.92
32.92
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 32.92 32.92 32.92 0
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
0 32.92 32.92 32.92 0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 17: 128-136 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
32.92
32.92
32.92
0
0
0
0
0
0
0
0
32.92
32.92
32.92
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 32.92 32.92 32.92 0
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
0 32.92 32.92 32.92 0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 18: 136-144 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 61: Average burnable poison loading (grams) per node for the 14th core.
0
32.92
32.92
32.92
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
111
Fuel Assembly U235 Enrichment per Node for 14th Axial Core
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
3.00
2.50
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
Node 1: 0-8 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 4: 24-32 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 7: 48-56 cm
4.95 4.95 4.95
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
4.95 4.95 4.95
Node 10: 72-80 cm
4.95 4.95 4.95
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
4.95 4.95 4.95
Node 13: 96-104 cm
4.95 4.95 4.95
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
4.95 4.95 4.95
Node 16: 120-128 cm
4.95 4.95 4.95
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
4.95 4.95 4.95
Node 19: 144-152 cm
4.95 4.95 4.95
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
4.95 4.95 4.95
Node 22: 168-176 cm
4.95 4.95 4.95
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
4.95 4.95 4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
3.00
2.50
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
2.50
3.00
2.50
4.95
4.95
4.95
4.95
4.95
2.50
3.00
2.50
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
Node 2: 8-16 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 5: 32-40 cm
4.95 4.95 4.95
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
4.95 4.95 4.95
Node 8: 56-64 cm
4.95 4.95 4.95
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
4.95 4.95 4.95
Node 11: 80-88 cm
4.95 4.95 4.95
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
4.95 4.95 4.95
Node 14: 104-112 cm
4.95 4.95 4.95
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
4.95 4.95 4.95
Node 17: 128-136 cm
4.95 4.95 4.95
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
4.95 4.95 4.95
Node 20: 152-160 cm
4.95 4.95 4.95
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
4.95 4.95 4.95
Node 23: 176-184 cm
4.95 4.95 4.95
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.50 3.50
4.50 3.00 4.50
3.50 4.50 3.50
3.50 3.50 3.50
4.50 4.00 4.50
4.95 4.95 4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
2.50
3.00
2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
3.00
2.50
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
2.50
3.00
2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
3.00
2.50
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.00
3.50
3.50
3.50
4.00
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.50
3.50
3.50
3.50
4.50
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
Node 3: 16-24 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 6: 40-48 cm
4.95 4.95 4.95
4.95 2.50 3.00 2.50 4.95
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
4.95 2.50 3.00 2.50 4.95
4.95 4.95 4.95
Node 9: 64-72 cm
4.95 4.95 4.95
4.95 2.50 3.00 2.50 4.95
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
4.95 2.50 3.00 2.50 4.95
4.95 4.95 4.95
Node 12: 88-96 cm
4.95 4.95 4.95
4.95 4.00 4.00 4.00 4.95
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
4.95 4.00 4.00 4.00 4.95
4.95 4.95 4.95
Node 15: 112-120 cm
4.95 4.95 4.95
4.95 4.00 4.00 4.00 4.95
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
4.95 4.00 4.00 4.00 4.95
4.95 4.95 4.95
Node 18: 136-144 cm
4.95 4.95 4.95
4.95 4.00 4.00 4.00 4.95
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
4.95 4.00 4.00 4.00 4.95
4.95 4.95 4.95
Node 21: 160-168 cm
4.95 4.95 4.95
4.95 4.50 4.00 4.50 4.95
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
4.95 4.50 4.00 4.50 4.95
4.95 4.95 4.95
Node 24 and 25: 184-200 cm
4.95 4.95 4.95
4.95 4.50 4.00 4.50 4.95
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.50 3.50 3.50
3.50 4.50 3.00 4.50 3.50
3.50 3.50 4.50 3.50 3.50
4.50 3.50 3.50 3.50 4.50
4.95 4.50 4.00 4.50 4.95
4.95 4.95 4.95
Figure 62: Assembly U235 enrichment per node for the 14th core.
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
3.00
2.50
4.95
4.95
4.95
4.95
4.95
2.50
3.00
2.50
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.95
4.95
4.95
4.00
4.00
4.00
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
4.95
4.50
4.00
4.50
4.95
4.95
4.95
4.95
112
The behavior of this core is shown in Figure 63. Despite the increased burnable poison
loading, the very beginning of the cycle still has no control rod withdrawal, once again
indicating a supercritical core. Nevertheless, this is an improvement from previous cores
which did not see control rod withdrawal until 3-4 MWd/Kg.
On the other hand, there is little to no improvement in the shape of the axial power
offset vs burnup, even though the bottom of the core had around 2000 grams of Gd2O3 per
node. This issue will have to be addressed in future cores in this 3rd group of axially graded
cores.
1
0.8
0.9
0.6
0.8
0.4
0.7
0.2
0.6
0
0.5
0
5
10
15
20
25
30
-0.2
0.4
-0.4
0.3
-0.6
Control Rod Insertion Percentage
Axial Power Offset
1
0.2
Axial Offset (14th Axial Core)
-0.8
-1
Control Rod Insertion (14th Axial
Core)
Burnup (MWd/Kg)
0.1
0
Figure 63: Axial offset and control rod insertion percentage vs burnup for the 14th core.
The maximum peaking factors vs burnup (Figure 64) show a similar trend: increased
peaking at the BOC, and a slight, steady rise from 15 MWd/Kg to the end of the core lifetime.
Considering the peaking factors alone, these would be acceptable. But as previously discussed,
the infeasible core conditions (supercriticality at BOC) and the nature of the axial power offset
bring undesired side effects, and drive the search for a better configuration.
113
4.5
Maximum Peaking Factor
4
3.5
3
2.5
2
14th Axial Core
1.5
Soluble Boron Core
1
0
5
10
15
20
25
30
Burnup (MWd/Kg)
Figure 64: Maximum total peaking factor vs burnup for the 14th core and a soluble boron
core.
5.3.2 Further Axially Graded SMR cores from the Third Group
Since the first core in this group was supercritical at BOC, and still developed an
unacceptable axial power profile throughout depletion, subsequent cores will focus on further
increasing the burnable poison loading at the bottom of the core. The middle and top of the
core maintain an consistent Gd2O3 loading profile, as does the U235 enrichment loading
pattern, since the primary goal for this 3rd group of cores seeks to ultimately determine the
impact from heavily poisoning the bottom of the core. If no core from this group meets the
design specifications, then further groups of cores will alter the Gd2O3 loading throughout the
core and the U235 enrichment loading pattern, among other considerations. Figures 65 and 66
display the burnable poison load and the average U235 enrichment vs core height.
114
200
14th Axial Core
Core Height (cm)
180
15th Axial Core
160
16th Axial Core
140
17th Axial Core
18th Axial Core
120
19th Axial Core
100
20th Axial Core
80
21st Axial Core
22nd Axial Core
60
40
20
0
0
1000
2000
3000
4000
5000
6000
Gd2O3 Loading (g)
Figure 65: Burnable poison loading vs core height for the third group of cores.
200
180
14th Axial Core
Core Height (cm)
160
15th Axial Core
140
16th Axial Core
120
17th Axial Core
17th Axial Core
100
18th Axial Core
80
19th Axial Core
60
20th Axial Core
40
21st Axial Core
22nd Axial Core
20
0
2.5
3
3.5
4
4.5
Average Burnup (MWD/KG)
Enrichment
Figure 66: Average U235 enrichment vs core height for the third group of cores.
5
115
As seen in Figures 67 and 68, increasing the Gd2O3 loading in the bottom of the core
did not impact the axial offset profile in any significant way. Some cores even demonstrated
increased supercriticality at the BOC. This behavior demonstrates that simply altering 3 axial
nodes has a minimal impact on the overall behavior of the core, even if they are poisoned to an
extreme level (5000 grams of Gd2O3).
Interestingly, while the bottom 3 nodes provide a strong impact on the neutron flux, the
overall axial flux still dives to around -0.4. While this is a small improvement from previous
cores, the overall shape of the axial offset remains the same, along with the similar steady
increase up until the end of cycle. Further axial cores will have to provide a more uniform plan
of attack and provide increased poisoning throughout the bottom of the core. Further altering
the U235 enrichment loading should also be considered.
1
0.8
0.6
Axial Power Offset
0.4
0.2
14th Axial Core
15th Axial Core
0
0
5
10
15
20
-0.2
16th25Axial Core
17th Axial Core
18th Axial Core
-0.4
19th Axial Core
20th Axial Core
-0.6
21st Axial Core
-0.8
-1
21st Axial Core
22nd Axial Core
Burnup (MWd/Kg)
Figure 67: Axial power offset vs burnup for the third group of cores.
30
116
1
0.9
14th Axial Core
15th Axial Core
0.8
16th Axial Core
18th Axial Core
Insertion Percentage
0.7
19th Axial Core
0.6
20th Axial Core
21st Axial Core
0.5
22nd Axial Core
0.4
0.3
0.2
0.1
0
0
5
10
15
20
25
30
Burnup (MWd/Kg)
Figure 68: Control rod insertion vs burnup for the third group of cores.
As Figure 69 shows, the maximum peaking factors are also minimally affected. They
retain the similar profile of increased factors at the BOC, along with the steady rise up until
the EOC. Based on the similar axial offset and control rod behavior, this is expected.
117
5
4.5
Maximum Peaking Factor
4
14th Axial Core
15th Axial Core
16th Axial Core
17th Axial Core
18th Axial Core
19th Axial Core
20th Axial Core
21st Axial Core
22nd Axial Core
3.5
3
2.5
2
1.5
1
0
5
10
15
20
25
30
Burnup (MWd/KG)
Figure 69: Maximum total peaking factor vs burnup for the third group of cores.
5.3 Fourth Group of Axially Graded SMR Cores
The first three groups continued to suffer from similar problems. Namely, insufficient
initial excess reactivity compensation and an unacceptable axial power profile throughout
burnup. It has been determined that simply overloading the bottom of the core with very
strong burnable poisons does not adequately address these issues, pointing to the need for a
more uniform poison profile throughout the bottom of the core.
Additionally, the lack of initial excess reactivity can be partially attributed to the 20 fuel
assemblies on the outer edge of the core that contain 4.95% U235 enriched and non-poisoned
assemblies. Even though they sit at the outer edge of the core where leakage effects tend to
dominate, the 20 total fuel assemblies constitute 35% of the total fuel assemblies in the core.
The lack of adequate results in the first three groups suggests changing these outer assemblies
to contain lower U235 enrichment, increased poisons, or both.
118
Furthermore, the continued axial power offset profile that slowly rises to unacceptably
high levels at EOC suggests returning to lower enriched assemblies at the top of the core.
Shielding and shadowing effects will likely still produce some amount of relatively higher
enriched assemblies at the top of the core at EOC, but lowering the initial U235 enrichment at
the top can blunt this effect.
In sum, this group of cores will employ the following strategies:
•
Low 2.50% U235 enriched and nominally poisoned at the outer edge of the core to
reduce the initial excess reactivity requirements and contribute toward a proper axial
power profile.
•
Nominal poisoning throughout the bottom of the core, with non-poisoned assemblies
at the top of the core to provide a more uniform poison profile where necessary.
•
High enriched U235 at the bottom and top of the core for a longer core lifetime,
balanced by low enriched assemblies at the top. The burnable poisons at the bottom of
the core, coupled with lower enriched assemblies in the outer ring should offset this
increase in enrichment.
•
Radial U235 enrichment loading that follows general guidelines from section 4.1 where
possible.
5.3.1 First core from Fourth group of axially graded SMR cores
The first core from this group is detailed in Figure 70, where the lower enrichment and
non-poisoned assemblies at the top of the core are balanced by the high enriched and
nominally poisoned assemblies at the bottom of the core.
119
Core Height (cm)
3.00
3.20
3.40
3.60
Average Burnup (MWD/KG)
Enrichment
3.80
4.00
4.20
4.40
4.60
4.80
5.00
200
200
180
180
160
160
140
140
120
120
100
100
80
80
60
60
23rd Axial Core - BP Loading (g)
40
40
23rd Axial Core - U235 Enrichment
20
20
0
0
0
50
100
150
200
250
300
350
400
450
500
Gd2O3 Loading (g)
Figure 70: Burnable poison loading and average U235 enrichment vs core height for the 23rd
core.
The fuel assemblies used in this group of cores contain a mix of various types of fuel
assemblies. Most notably, use of mid-to-strong poisoned assemblies that deplete both slow
and quick. Coupling these different types of fuel assemblies together is aimed toward
providing enough long-term reactivity compensation to battle axial power offset throughout
the middle of the cycle, while still providing adequate but not overwhelming poisoning
throughout the BOC. Figure 71 provides a snapshot of a few of the different fuel assemblies
used.
120
1.2
1.1
Kinf
1
0.9
0.8
0.7
0.6
0
5
10
15
20
25
30
Burnup (MWd/Kg)
Figure 71: kinf vs burnup for the fuel assemblies used in the fourth group of cores.
Figure 72 and 73 show the detailed burnable poison and U235 enrichment composition
for each fuel assembly in each node. Notice the outer ring of assemblies, where the top of the
core contains non-poisoned 2.50% U235, while the bottom of the core contains nominally
poisoned 4.95% U235. Additionally, the burnable poisons extend into the top half of the core to
provide uniform initial excess reactivity compensation.
121
Average Burnable Poison Loading (grams) per Node for 23rd Axial Core
5.487
5.487 5.487
5.487 5.487
5.487 5.487
5.487
5.487
5.487 5.487
5.487 5.487
5.487 5.487
5.487
5.487
5.487 5.487
5.487 5.487
5.487 5.487
5.487
0
0
0
0
4.801
4.801
4.801
0
0
0
0
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 4: 24-32 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 7: 48-56 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 10: 72-80 cm
0
0
0
0 4.801 4.801 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 4.801 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 4.801 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 4.801 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5.487
5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487
5.487
5.487
5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487
5.487
5.487
5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487
5.487
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
4.801
4.801
4.801
0
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 5: 32-40 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 8: 56-64 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 11: 80-88 cm
0
0
0
0 4.801 4.801 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 4.801 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5.487
5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487
5.487
5.487
5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487
5.487
5.487
5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487
5.487
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 6: 40-48 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 9: 64-72 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 12: 88-96 cm
0
0
0
0 4.801 4.801 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 4.801 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 72: Average burnable poison loading (grams) per node for the 23rd core.
5.487
5.487 5.487
5.487 5.487
5.487 5.487
5.487
5.487
5.487 5.487
5.487 5.487
5.487 5.487
5.487
5.487
5.487 5.487
5.487 5.487
5.487 5.487
5.487
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
122
Fuel Assembly U235 Enrichment per Node for 23rd Axial Core
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 1: 0-8 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 4: 24-32 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 7: 48-56 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 5: 32-40 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 8: 56-64 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 3: 16-24 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 6: 40-48 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 9: 64-72 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Figure 73: Fuel assembly U235 enrichment per node for the 23rd core.
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
123
The axial offset and control rod movement throughout depletion for this core is detailed
in Figure 74 below. There is finally enough initial excess reactivity compensation to engage
the control rods right away, signifying a critical core at BOC. The control rods remain around
90% inserted until around 7 MWd/Kg, showing how the burnable poison depletion matches
the overall depletion of the core. At 7 MWd/Kg the depletion of the core outpaces the
depletion of Gd2O3, and less reactivity compensation is required from control rods, resulting in
a slow withdrawal until EOC.
Unfortunately, the strong 90% insertion of control rods results in the bottom 10% of the
core experiencing relatively high neutron flux levels. This contributes heavily to a strongly
negative axial power offset profile at BOC. And due to a strong negative axial power profile,
U235 in the bottom of the core depletes faster than the top of the core, once again resulting in a
slow rise to the axial power profile throughout the middle and end of the cycle.
1
1
Axial Offset (23rd Axial Core)
0.8
0.9
0.6
0.8
0.4
0.7
0.2
0.6
0
0.5
0
5
10
15
20
25
30
-0.2
0.4
-0.4
0.3
-0.6
0.2
-0.8
0.1
-1
Burnup (MWd/Kg)
Figure 74: Axial offset and control rod insertion vs burnup for the 23rd core.
0
Control Rod Insertion Percentage
Axial Power Offset
Control Rod Insertion (23rd Axial Core)
124
The peaking factors for this core (Figure 75) demonstrate how deep control rod
insertion at BOC results in extremely high peaking factors. The difference between this core
and earlier cores, which also saw deep control rod insertion around the BOC, is the lack of
strong burnable poisons at the bottom of the core. This core contained only nominal
poisoning, with the bottom 9 nodes loaded with less than 500 grams of Gd2O3. The peaking
factors return to acceptable levels once the control rods begin to withdrawal, indicating hope
for a feasible core (one that is not supercritical at BOC like previous cores) that provides
adequate peaking factors. However, the poor axial flux profile still shows room for significant
improvement.
11
10
Maximum Peaking Factor
9
8
7
23rd Axial Core
6
Soluble Boron Core
5
4
3
2
1
0
5
10
15
20
25
30
Burnup (MWD/KG)
Figure 75: Maximum total peaking factor vs burnup for the 23rd core and a soluble boron
core.
5.3.2 Further Axially Graded SMR cores from the Fourth Group
The first core experienced a few problems arising from deep control rod insertion at
BOC. To combat this, increased overall reactivity compensation would drive the control rods
to be further withdrawn at the BOC. Couple that with further poisoning the outer ring of fuel
125
assemblies at the bottom of the core, and improvements could be realized. Therefore, this
group of cores focuses on increasing the burnable poison loading throughout the bottom of the
core, along with mixing different types of fuel assemblies to change the overall Gd2O3
depletion profile (i.e., providing more initial reactivity compensation at the expense of a quick
depletion, or less initial reactivity compensation while providing a longer Gd2O3 lifetime).
The strategies outlined above are evidenced in figures 76 and 77 below, which show the
variations in Gd2O3 loading and U235 enrichment vs core height for each of the 7 cores in this
group. The burnable poison loading at the bottom of the core was slowly increased, reaching a
maximum of around 700 grams Gd2O3 per node, while the U235 enrichment stayed constant
throughout all 7 cores.
200
180
23rd Axial Core
160
24th Axial Core
Core Height (cm)
140
25th Axial Core
26th Axial Core
120
27th Axial Core
100
28th Axial Core
29th Axial Core
80
60
40
20
0
0
100
200
300
400
500
600
Gd2O3 Loading (g)
Figure 76: Burnable poison loading vs core height for the fourth group of cores.
700
800
126
200
180
23rd Axial Core
160
24th Axial Core
25th Axial Core
140
Core Height (cm)
26th Axial Core
120
27th Axial Core
28th Axial Core
100
29th Axial Core
80
60
40
20
0
2.5
3
3.5
4
4.5
5
Average Burnup (MWD/KG)
Enrichment
Figure 77: Average U235 enrichment vs core height for the fourth group of cores.
The rest of the cores from group 4 unfortunately did not fare much better than the first
core. While all 7 cores demonstrated adequate initial reactivity compensation, it appears as
though increasing the Gd2O3 concentration in the bottom half of the core did not provide any
long-term stability to the axial power offset profile (Figure 78). By 10 MWd/Kg, there is little
discernable difference between any of the different cores. A more radical adjustment must be
made, either to Gd2O3 loading or to the U235 enrichment, or both.
127
1
0.8
0.6
Axial Power Offset
0.4
0.2
0
0
5
10
15
20
25
30
23rd Axial Core
-0.2
24th Axial Core
-0.4
25th Axial Core
26th Axial Core
-0.6
27th Axial Core
28th Axial Core
-0.8
29th Axial Core
-1
Burnup (MWd/Kg)
Figure 78: Axial power offset vs burnup for the fourth group of cores.
Meanwhile, we can clearly see from the control rod insertion vs burnup graph (Figure
79), that increasing the burnable poison loading at the bottom of the core does have an impact
of the control rod insertion depth. Unfortunately, it only delays the inevitable re-insertion of
control rods when the Gd2O3 depletes. The 29th overall core displays good poisoning at the
bottom of the core, keeping the control rods at just over 50% insertion. Unfortunately when
the Gd2O3 depletes, the control rods are once again inserted close to 90%. There is a clear
need for long-term and long-lasting Gd2O3 poisoning if any adequate axial power profile is to
be established.
128
1
0.9
23rd Axial Core
Insertion Percentage
0.8
24th Axial Core
0.7
25th Axial Core
0.6
26th Axial Core
27th Axial Core
0.5
28th Axial Core
0.4
29th Axial Core
0.3
0.2
0.1
0
0
5
10
15
20
25
30
Burnup (MWd/KG)
Figure 79: Control rod insertion vs burnup for the fourth group of cores.
The peaking factors (Figure 80) for the remaining 6 cores in this 4th group show a
similar trend to what was found in the 1st core in this 4th group. As the first core displayed a
strong peaking factor spike at BOC, the other 6 cores in this group also show a strong spike,
just slightly delayed, depending upon the amount of Gd2O3 loading in the bottom of the core.
Every core displayed a strong peak, which again arises due to the lack of poisoning in the
bottom of the core when the control rods are re-inserted to around 90%. This leaves the
bottom 10% of the core completely unsuppressed and exposed to very high neutron flux levels
(and a strong negative axial offset as well). Any improvements will have to come from longerlasting burnable poisons throughout the bottom of the core.
129
13
23rd Axial Core
24th Axial Core
11
Maximum Peaking Factor
25th Axial Core
26th Axial Core
9
27th Axial Core
28th Axial Core
7
29th Axial Core
5
3
1
0
5
10
15
20
25
30
Burnup (MWd/KG)
Figure 80: Maximum total peaking factor vs burnup for the fourth group of cores.
5.5 Fifth Group of Axially Graded SMR Cores
The fourth group of cores performed better than previous groups in terms of both the
axial power profile throughout the lifetime of the core, and in the initial amount of excess
reactivity. However, the axial power profile continued to suffer from a strong negative value
around 10 MWd/Kg and slowly rising to a very strong positive value at the EOC. The likely
culprit for such behavior lies in the inability to provide burnable poisons that last throughout
the middle of the cycle. The presence of burnable poisons does an adequate job in controlling
the axial power profile at the BOC, but even the fuel assemblies that contain relatively longer
lasting poisons still deplete too quickly to continue to control the axial offset into MOC.
In an attempt to fix these issues, this group of cores will use the fuel assemblies that
contain the longest lasting burnable poisons. These fuel assemblies are detailed in Figure 81
below, which also contain strong initial poisoning. In order to provide enough poisoning at the
130
bottom of the core around MOC to control the axial power profile, a relatively large number of
these fuel assemblies must be used, since the poisons have depleted by over 50% of their
original strength by 10 MWd/Kg. This has the unintentional byproduct of potentially creating
a core that contains more poisons than necessary at BOC. But this effect would only result in
the control rods being inserted less, which would in turn provide a lower impact on the axial
power profile. Therefore with this strategy, it is expected to see a positive axial power offset at
BOC in order to create a manageable power profile at MOC and EOC.
1.2
1.1
Kinf
1
0.9
0.8
0.7
0.6
0
2
4
6
8
10
12
14
16
18
20
Burnup (MWd/Kg)
Figure 81: kinf vs burnup for fuel assemblies used in the fifth group of cores.
In sum, the following strategies will be employed in this 5th group of axially graded
cores:
•
Low 2.50% U235 enriched and nominally poisoned assemblies at the outer edge of the
core to reduce the initial excess reactivity requirements and contribute toward a proper
axial power profile.
•
Fuel assemblies that provide strong initial poisons and slow depletion at the bottom of
the core to provide long-term control of the axial power profile.
•
Non-poisoned assemblies at the top of the core to reduce the propensity toward
strongly positive axial power offset at EOC.
131
•
High enriched U235 at the bottom and top of the core for a longer core lifetime,
balanced by low enriched assemblies at the top. The high enriched assemblies at the
bottom also provide a counterbalance to the positive axial power offset at EOC.
•
Radial U235 enrichment loading that follows general guidelines from section 4.1 where
possible.
5.5.1 First Core from Fifth Group of Axially Graded Cores
The first core from this fifth group implements the above strategies by increasing the
overall Gd2O3 loading in the bottom of the core from the fuel assemblies provided in Figure
82. Figure 83 demonstrates this increase, where the bottom 10 axial nodes contain 900 grams
of Gd2O3.
Core Height (cm)
3.00
3.20
3.40
3.60
Average Burnup (MWD/KG)
Enrichment
3.80
4.00
4.20
4.40
4.60
4.80
5.00
200
200
180
180
160
160
140
140
120
120
100
100
80
80
60
60
30th Axial Core - BP Loading (g)
40
40
30th Axial Core - U235 Enrichment
20
20
0
0
100
200
300
400
500
600
700
800
900
0
1000
Gd2O3 Loading (g)
Figure 82: Burnable poison loading and average U235 enrichment vs core height for the 30th
core.
132
The exact loading arrangement for Gd2O3 and U235 in this first core is detailed in Figure
83 and 84. The other cores from this fifth group follow a similar loading arrangement as this
first core, with nominal differences from one core to the next. As can be seen, the poisoning
abruptly stops at the 10th node. The purpose is to provide strong reactivity compensation
throughout the bottom of the core to offset the partial insertion of control rods. The top of the
core contains no poisons in an attempt to reduce the positive axial offset at the EOC that every
previous core has demonstrated. If the top of the core is not poisoned and contains low U235
enrichment, then every attempt is given to create a manageable axial offset at EOC.
133
Average Burnable Poison Loading (grams) per Node for 30th Axial Core
16.46
16.46 14.4
16.46 14.4
16.46 14.4
16.46
16.46
16.46 14.4
16.46 14.4
16.46 14.4
16.46
16.46
16.46 14.4
16.46 14.4
16.46 14.4
16.46
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 4: 24-32 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 7: 48-56 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 10: 72-80 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 13: 96-104 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16.46
16.46
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
16.46
16.46
16.46
16.46
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
16.46
16.46
16.46
16.46
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
16.46
16.46
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 5: 32-40 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 8: 56-64 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 11: 80-88 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16.46
16.46
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
16.46
16.46
16.46
16.46
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
16.46
16.46
16.46
16.46
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
16.46
16.46
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 6: 40-48 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 9: 64-72 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 12: 88-96 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 83: Average burnable poison loading (grams) per node for the 30th core.
16.46
14.4 16.46
14.4 16.46
14.4 16.46
16.46
16.46
14.4 16.46
14.4 16.46
14.4 16.46
16.46
16.46
14.4 16.46
14.4 16.46
14.4 16.46
16.46
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
134
Fuel Assembly U235 Enrichment per Node for 30th Axial Core
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 1: 0-8 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 4: 24-32 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 7: 48-56 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 5: 32-40 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 8: 56-64 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 3: 16-24 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 6: 40-48 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 9: 64-72 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Figure 84: Fuel assembly U235 enrichment per node for the 30th core.
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
135
Depletion of this first core resulted in the axial offset and control rod insertion vs
burnup graph provided in Figure 85. The strategy of increasing the amount of poisons at the
bottom of the core does provide a better axial power profile at BOC, but slowly decreases to a
very low value of -0.9 at 15 MWd/Kg. In this instance, over 90% of the power is being
produced in the bottom half of the core, despite the control rods only being 60% inserted.
Thus, while improvements are realized at BOC, this core is still unable to contain the axial
offset into MOC.
1
1
0.8
0.9
Axial Offset (30th Axial Core)
Control Rod Insertion (30th Axial Core)
0.4
Axial Power Offset
0.8
0.7
0.2
0.6
0
0.5
0
5
10
15
20
25
30
-0.2
0.4
-0.4
0.3
-0.6
0.2
-0.8
0.1
-1
Burnup (MWd/Kg)
Control Rod Insertion Percentage
0.6
0
Figure 85: Axial offset and control rod insertion vs burnup for the 30th core.
Considering the continuing issues in the axial offset and control rod insertion, the
peaking factors also continue the general trends seen in the fourth group of axial cores (Figure
86). As the axial offset slowly declines throughout BOC and into MOC, the peaking factors
slowly rise, reaching a peak at 15 MWd/Kg where over 90% of the total core power is being
produced in the bottom half of the core. Future cores in this fifth group will have to better
address the MOC axial offset through the increased use of long-term burnable poisons.
136
8
30th Axial Core
Maximum Peaking Factor
7
Soluble Boron Core
6
5
4
3
2
1
0
5
10
15
20
25
30
Burnup (MWD/Kg)
Figure 86: Maximum total peaking factor vs burnup for the 30th core.
5.5.2 Further Axially Graded SMR Cores from the Fifth Group
The rest of the cores from this fifth group continue to increase the burnable poison
loading in the bottom half of the core in an attempt to control the axial power profile
throughout MOC. Figure 87 shows how the total Gd2O3 loading changed from one core to the
next. Additional changes occurred through altering the type of fuel assemblies used, with later
cores in this 5th group utilizing the longest lasting Gd2O3 fuel assemblies.
200
30th Axial Core
31st Axial Core
32nd Axial Core
33rd Axial Core
34th Axial Core
35th Axial Core
180
160
Core Height (cm)
140
120
100
80
60
40
20
0
0
500
1000
1500
Gd2O3 Loading (g)
2000
2500
Figure 87: Burnable poison loading vs core height for the fifth group of cores.
3000
137
As can be seen in figure 88, the enrichment loading arrangement did not change at all
from one core to the next. While a lot of emphasis is being placed on controlling the axial
power profile throughout BOC and MOC, the enrichment scheme still contains high enriched
assemblies at the bottom with low enriched assemblies at the top. As explained earlier, by
itself this enrichment loading scheme is counter intuitive with respect to controlling the axial
offset at BOC, since the axial power profile has seen far too much power being produced in
the bottom half of the core. Placing high enriched assemblies at the bottom will only create a
further propensity for increased power production.
However, the EOC has routinely seen high axial offset values due to shielding and
shadowing effects. The only mechanism the reactor engineer has to control the EOC power
profile is through axially grading the U235 enrichment, since all Gd2O3 will have depleted by
the EOC. In this manner, using low enriched assemblies at the top aims to reduce the axial
offset at the EOC, while the high enriched assemblies at the bottom of the core can be offset
by including strong burnable poisons.
200
30th Axial Core
180
31st Axial Core
160
32nd Axial Core
Core Height (cm)
140
33rd Axial Core
120
34th Axial Core
100
35th Axial Core
80
60
40
20
0
2.5
3
3.5
4
4.5
Average Burnup (MWD/KG)
Enrichment
Figure 88: Average U235 enrichment vs core height for the fifth group of cores.
5
138
Figure 89 displays the axial power offset vs burnup for the cores in this fifth group. As
can be seen, improvements have been realized for the BOC, up until around 5 MWd/Kg,
where each core dramatically differs from each other. As a general trend, increasing the Gd2O3
loading at the bottom of the core results in an improved axial offset profile throughout the
BOC. However, increasing the loading too much (beyond 700 grams) tends to create some
dramatic effects. Namely, core 33 and 34 possess a much shorter core lifetime, while core 32
has a lot of instability around 15 MWd/Kg, right as the Gd2O3 has completely depleted.
1
30th Axial Core
31st Axial Core
33rd Axial Core
34th Axial Core
0.8
0.6
Axial Power Offset
0.4
0.2
0
0
5
10
15
20
-0.2
-0.4
-0.6
-0.8
-1
Burnup (MWd/Kg)
Figure 89: Axial power offset vs burnup for the fifth group of cores.
25
30
139
1
0.9
30th Axial Core
0.8
31st Axial Core
Insertion Percentage
0.7
33rd Axial Core
0.6
34th Axial Core
0.5
0.4
0.3
0.2
0.1
0
0
5
10
15
20
25
30
Burnup (MWd/Kg)
Figure 90: Control rod insertion vs burnup for the fifth group of cores.
Looking specifically at cores 33 and 34, the abrupt increase in poison loading
throughout the bottom 9 axial nodes to 1856 grams of Gd2O3 created too much reactivity
suppression. The control rods engage just beyond 50% insertion at BOC, and are slowly
removed until 13-14 MWd/Kg, when the core goes subcritical, indicating the end of its cycle.
While a lot of reactivity is still left in the bottom half of the core (where there are 4.95% U235
enriched assemblies), the strong poisoning still leaves this part of the core too suppressed to
contribute. This is reflected in the low power levels at the bottom of the core, contributing to
the high axial offset values at 13 MWd/Kg. Figure 91 demonstrates this effect through the
relative power fraction, kinf, and average core exposure vs core height at EOC (11 MWd/Kg of
average core exposure, just before core 34 goes subcritical).
25
25
20
20
Axial Node
Axial Node
140
15
10
15
10
5
5
0
0
0
0.5
1
1.5
Relative Power Fraction
2
2.5
0
10
20
30
Average Exposure (MWd/Kg)
Figure 91: Relative power fraction and average exposure at 11 MWd/Kg for core 34.
The average exposure demonstrates the limited burnup in the bottom half of the core,
where nodes 1-6 all possess an average exposure of less than 1 MWd/Kg. Appropriately, the
middle of the core sees a dramatic spike in exposure, peaking at 25 MWd/Kg in node 13. The
middle of the core is non-poisoned with nominally enriched 3.25% U235 assemblies, which
both contribute to the large peak. Furthermore, beyond 5 MWd/Kg of average total core
exposure, the control rods no longer inhabit the middle of the core, leaving this part of the core
completely non-poisoned. Appropriately, these cores experience relatively large exposures,
and quickly deplete.
The relative power fraction vs core height at 11 MWd/Kg of total core exposure tells a
similar story. Right before the core goes subcritical, the top of the core shoulders most of the
power production, with negligible power production in the bottom of the core. This leads to
the shortened lifetime.
Clearly, the bottom of the core contains too much Gd2O3 in cores 33 and 34. The other
cores in this group do not contain such drastic poisoning at the bottom of the core, which is
reflected in the longer core lifetime. Unfortunately, the same familiar axial offset curve is
displayed. While the axial offset is closer to zero at BOC, it quickly dives negative before
slowly climbing to a peak at EOC. The use of the fuel assemblies with long burnable poison
lifetimes still did not create adequate poisoning throughout the MOC.
141
13
30th Axial Core
11
Maximum Peaking Factor
31st Axial Core
9
33rd Axial Core
7
34th Axial Core
5
3
1
0
5
10
15
20
25
30
Burnup (MWd/Kg)
Figure 92: Maximum total peaking factor vs burnup for the fifth group of cores.
Figure 92 displays the maximum peaking factors for this group of cores. Once again a
few peaks were encountered, specifically for cores 30-32 around 15-20 MWd/Kg. Looking
back at the control rod insertion vs burnup (Figure 90), cores 30-32 did not possess a smooth
and consistent removal of control rods. For these three cores, the control rods were re-inserted
at some point, when the Gd2O3 depletion outpaced the U235 depletion and an increase in excess
reactivity compensation was required. This additional compensation had to come from the
control rods, and their further insertion resulted in a smaller area of the core that contained no
neutron poisons at all (since at this point all Gd2O3 has been depleted). As the control rods
were re-inserted, these non-poisoned areas experienced dramatic increases in the neutron flux,
and thereby also in power production.
This effect coincided with a sharp rise in the maximum peaking factor. Appropriately, if
the control rods are being withdrawn slowly and smoothly, and then begin to be re-inserted, it
must be due to an addition of positive reactivity. And since no U235 is being physically added
to the core in the middle of the cycle (nor any other physical additions of positive reactivity in
normal operations), this additional reactivity must be a result of Gd2O3 depletion that outpaces
the natural depletion of U235 in the core itself. By the time this effect results in control rod re-
142
insertion, the impact Gd2O3 has on the neutron population has already been dramatically
reduced. As described above, this results in the re-insertion of control rods in a core that
possesses largely depleted burnable poisons. Thus, while control rod insertion at the top of the
core suppresses the neutron flux locally, the bottom of the core is now non-poisoned, and
contains no control rods, which dramatically increases the neutron flux, and the resultant
peaking factors.
To avoid this, the depletion of Gd2O3 must be slower than the natural depletion of U235
in the core, in order to avoid any re-insertion of control rods and the accompanying increase in
peaking factors. Unfortunately, the burnable poisons used in this section of fuel assemblies
contained the longest-lasting burnable poisons of all the fuel assemblies created in Chapter 4.
The lack of any longer-lasting poisons in any fuel assemblies leaves little options for
improvement.
Furthermore, the axial offset profile demonstrated in cores 30-32 show little to no
improvement from past iterations. Specifically, the MOC has consistently demonstrated a
strongly negative axial offset in every core. The ability to control this negative axial offset in
the MOC is linked to strong poisons at the bottom of the core that last throughout the MOC,
but cores in this fifth group (specifically cores 30-32) used fuel assemblies with the slowest
Gd2O3 depletion, and still demonstrated no significant improvement.
Since cores 30-32 did not provide enough poisons in the bottom of the core, cores 33
and 34 loaded even more poisons in the bottom, introducing fuel assemblies from the
unrealistic group detailed in Section 4.3.1.2.2. This was a last resort effort to provide enough
poisoning throughout the MOC. Unfortunately, the need to create a consistent Gd2O3 depletion
profile that matches U235 depletion in the core (to avoid further control rod re-insertion),
required these assemblies to contain more than necessary poisoning at BOC. As the results
from cores 33 and 34 demonstrated, this abundance of burnable poisons at BOC completely
overwhelmed the bottom of the core and suffocated any power production. This resulted in a
dramatically shortened core lifetime.
It appears that a strategy of axially grading the burnable poisons and U235 enrichment
percentages in order to combat the inevitable partial insertion of control rods will not create a
core that meets the design requirements listed in Chapter 3. To properly run a core without
soluble boron, alternate strategies must be explored.
143
5.6 Conclusion
The above section detailed a search for a soluble boron-free core that met the design
requirements listed in Section 3.2. These requirements consisted primarily of a controlled
axial offset within +/- 0.4 and maximum peaking factors throughout burnup that were kept
below 4.22, and resulted in a maximum heat flux that maintained DNBR limits. While the
search held potential with some cores that contained potentially viable peaking factors, no
core even came close to an axial offset profile within +/- 0.4.
The limitations behind controlling the axial offset lie in the ability to provide consistent,
long term poisoning in the bottom of the core that both naturally matched the U235 depletion in
the core, and contained enough negative reactivity to offset the partial insertion of control
rods. Unfortunately, such a scheme proved untenable due to a lack of long-term poisoning.
Since Gd2O3 naturally depletes, the ability to provide sufficient negative reactivity from
burnable poisons throughout the MOC would result in fuel assemblies that are loaded with an
excess of burnable poisons at BOC. Any reduction in the initial amount of burnable poisons
creates a lack of negative reactivity during MOC, adversely affecting the axial offset profile.
Any attempt to provide a viable soluble boron-free SMR that meets the design
requirement would have to incorporate alternate strategies. A strategy based solely on axially
grading both the burnable poison content and the U235 enrichment percentages has thus far
proven untenable.
144
Chapter 6 – Further Strategies for Soluble Boron-Free Operation
The above difficulties in controlling the axial power profile in a soluble boron-free core
demonstrate the inherent weaknesses of a strategy that only employs axially grading burnable
poisons and U235 enrichment percentages. In order to find a core that meets design
requirements, other strategies must be explored, but before any exploration into a new
strategy, a summary of the strategies employed in Chapter 5 is given below:
•
One large control rod bank consisting of 20 fuel assemblies with control rods that are
actively inserted to maintain criticality.
•
Large concentrations of burnable poisons in the bottom half of the core to
counterbalance the partial insertion of control rods.
•
Axially graded U235 enrichment throughout the core for long-term axial power profile
control and other considerations.
It is important to note how the requirements placed on the burnable poisons arise from
the total reactivity worth in the partially inserted control rods. Since there are 20 fuel
assemblies with active control rods in the critical control rod bank (the rod bank that actively
maintains criticality), the total control rod worth inherent in this bank is relatively large.
This large amount of reactivity is what places a heavy burden on burnable poisons in
the bottom half of the core to balance out the axial reactivity compensation profile. However,
if the reactivity worth associated with the critical control rod bank is reduced, then the impact
this bank has on the axial power profile would be reduced as well. Simply put, reducing the
number of control rods that are partially inserted in the core minimizes their adverse impact on
the axial power profile.
In this vein, a simple and potentially more effective strategy for soluble boron-free
operation in an SMR would be to limit the total number of control rods that are actively
inserted in the core. While the amount of excess reactivity that must be compensated will not
change, the manner in which this reactivity is compensated will change. For example, reduce
the number of fuel assemblies in the critical rod bank from 20 to 9.
145
To make up the loss in reactivity at BOC, separate control rod banks would have to be
completely inserted in the core. The completely inserted control rods provide axially uniform
reactivity compensation, and thus will not have an adverse impact on the axial power offset.
In the above example, only 9 fuel assemblies are in the critical rod bank. This lower
worth will result in quicker control rod withdrawal as U235 in the core naturally depletes.
Eventually, control rods in the critical rod bank will be fully withdrawn, at which point a set
number of fully inserted control rods from a separate control rod bank will be completely
withdrawn, prompting the critical rod bank to be re-inserted into the core. This process
continues until there are no more fully inserted control rods, at which point the core has
reached the end of its cycle.
6.1 Feasibility of the Advanced Control Rod Algorithm
The above control rod algorithm was demonstrated on the prototypical SMR core. To
demonstrate feasibility, this SMR core contained no axially graded burnable poisons or U235
enrichment, unlike Chapter 5. Every fuel assembly contained no burnable poisons, and was
loaded with 4.95% U235, producing the most excess reactivity possible for this SMR. The only
exception is the outer ring of fuel assemblies, which were loaded with 2.50% U235.
The feasibility of this control rod algorithm was tested with 9 fuel assemblies in the
critical rod bank at BOC. The large amount of excess reactivity at BOC arising from the lack
of burnable poisons and 4.95% U235 enriched fuel assemblies necessitates an extra 28 fuel
assemblies with completely inserted fuel rods.
This arrangement provided sufficient excess reactivity until 8.0 MWd/Kg, at which
point the natural depletion of U235 has prompted the critical rod bank to be fully withdrawn. At
this point, 8 fuel assemblies from a different control rod bank that were previously fully
inserted are now removed, leaving a total of 20 fuel assemblies fully inserted in the core. This
withdrawal of control rods prompts the critical rod group to be re-inserted, and the process
continues. Figure 93 displays all 5 depletion stages for this control rod algorithm.
146
0 - 8.0 MWd/Kg
8.0 - 12.0 MWd/Kg
17.0 - 23.0 MWd/Kg
23.0 - 26.5 MWd/Kg
12.0 - 17.0 MWd/Kg
100% Withdrawn CRD
100% Inserted CRD
Active CRD
Figure 93: Depletion stages for an initial control rod algorithm designed to contain the axial
power profile.
In addition to simply removing fully inserted control rods from one depletion step to the
next, the geometrical arrangement of the fully inserted control rods was shuffled. This
provided a counterbalance to shielding and shadowing effects, resulting in a more uniform
exposure radially across the core.
The critical control rod bank was also changed, in both location and number of control
rods. The first two depletion steps contained 9 fuel assemblies, spanning from 0.0 MWd/Kg to
12.0 MWd/Kg. The next two depletion steps utilized a different rod bank for criticality search,
containing 8 fuel assemblies and spanning from 12.0 MWd/Kg to 23.0 MWd/Kg. The last and
final depletion stage contained just 4 fuel assemblies with no fully inserted rods, and ran until
EOC at 26.5 MWd/Kg.
Figure 94 below shows the axial power profile and control rod insertion vs burnup. In
stark contrast to the heavily poisoned cores in Chapter 5, the axial power offset contains
several sharp drops with each drop coinciding perfectly with the depletion stages outlined in
Figure 93.
147
Axial Power Offset
0.8
0.9
0.6
0.8
0.4
0.7
0.2
0.6
0.5
0
-0.2
0
5
10
15
20
25
30
0.4
-0.4
0.3
-0.6
0.2
-0.8
-1
Axial Offset
Control Rod Insertion Percentage
1
1
0.1
Control Rod Insertion
Burnup (MWd/Kg)
0
Figure 94: Axial offset and control rod insertion vs burnup for the initial control algorithm.
At BOC, the control rods in the critical rod bank are almost 100% inserted and slowly
withdrawal until 8 MWd/Kg where the next depletion stage begins. Throughout this first
depletion stage, the axial offset slowly climbs as the control rods are further withdrawn. As the
next depletion step begins at 8 MWd/Kg, the critical rod bank is re-inserted, prompting a sharp
dive in the axial offset before slowly rising again, with the process continuing throughout the
cycle.
Even without any burnable poisons or varied U235 enrichment loading, the axial offset
for this simple feasibility study the axial power offset was maintained within ± 0.5, an already
significant improvement from any core in Chapter 5. This demonstrates the feasibility of this
advanced control rod algorithm in maintaining the axial power offset.
Figure 95 displays the maximum peaking factor vs burnup. Aside from the first few
MWd/Kg of burnup, the peaking factors remain in roughly the same ballpark as a core with
soluble boron. The link between axial offset and maximum peaking factors is apparent, since
the sharp jumps and drops in axial offset once again coincide with the changing depletion
stages outlined in Figure 93. Refinements to the control rod algorithm and introducing some
nominal poisoning could further improve the both the peaking factors and the axial power
profile throughout burnup.
148
5.5
Maximum Peaking Factor
5
4.5
4
3.5
3
2.5
2
Control Rod Algorithm Core
1.5
Soluble Boron Core
1
0
5
10
15
20
25
30
Burnup (MWd/Kg)
Figure 95: Maximum total peaking factor vs burnup for the initial control rod algorithm.
6.2 Final Advanced Control Rod Algorithm
Section 6.1 outlined the feasibility behind using a control rod algorithm with various
depletion stages to control the axial offset in a soluble boron-free core. In order to find a core
that meets design requirements listed in Chapter 3, further refinements to the control rod
algorithm were performed.
Since the total number of partially inserted control rods is the primary factor behind
poor axial power offset performance, the number of fuel assemblies in the critical rod bank
was reduced from 8 to 5. In this manner, a minimum number of control rods are actively
inserted in the core. As a consequence, the lower worth associated with this critical rod bank
introduces more depletion stages, since this critical rod bank will respond to natural U235
depletion quicker than a rod bank with more worth.
Additionally, every fuel assembly was nominally poisoned with a fuel assembly from
the “Flat Burn” group of assemblies outlined in Section 4.3.1.1. That fuel assembly is listed in
Figure 96. The chosen fuel assembly was selected for its flat burnup characteristics, since it
should provide relatively constant excess reactivity compensation until 25 MWd/Kg, near the
end of the expected fuel cycle.
149
Kinf vs Burnup
1.3
1.25
Kinf
1.2
1.15
1.1
1.05
1
0
5
10
15
20
25
30
35
Burnup (MWd/Kg)
Figure 96: kinf vs burnup for the fuel assembly used in the final control rod algorithm.
The fuel assembly U235 enrichment loading scheme and burnable poison profile is
outlined in Figure 97. Since there is no axial grading, the given profile is constant axially
throughout the core.
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
Fuel Assembly U235 Enrichment
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
0
0
0
Average Burnable Poison Loading (grams)
0
0
0
0 9.603 9.603 9.603 0
0 9.603 9.603 9.603 9.603 9.603 0
9.603 9.603 9.603 9.603 9.603 9.603 9.603
9.603 9.603 9.603 9.603 9.603 9.603 9.603
9.603 9.603 9.603 9.603 9.603 9.603 9.603
0 9.603 9.603 9.603 9.603 9.603 0
0 9.603 9.603 9.603 0
0
0
0
0
0
0
Figure 97: Fuel assembly U235 enrichment and burnable poison loading profile for the final
advanced control rod algorithm.
Careful selection of the proper depletion steps for this arrangement was performed, and
is detailed in Figure 98. The introduction of uniform poisoning has reduced the reactivity
compensation burden on control rods at BOC from 28 fuel assemblies with fully inserted
control rods to 13. This drastic reduction, along with the already reduced amount of fuel
assemblies in the critical rod bank, impacts the axial offset and relative peaking factors
significantly.
150
0 - 6.5 MWd/Kg
6.5 - 17.5 MWd/Kg
17.5 - 22.0 MWd/Kg
22.0 - 23.5 MWd/Kg
23.5 - 28.0 MWd/Kg
28.0 - 30.0 MWd/Kg
100% Withdrawn CRD
100% Inserted
Active CRDs
Figure 98: Depletion stages for the final advanced control rod algorithm.
As mentioned above, reducing the amount of fuel assemblies in the critical rod bank
reduces the total reactivity worth in that bank. This would ordinarily result in control rods that
would be withdrawn quicker, but the inclusion of poisoned fuel assemblies dampens this
effect. In this manner, the first two depletion stages last until 17.5 MWd/Kg. The final four
depletion stages are relatively shorter since by this point the burnable poisons are close to
being completely depleted and have lost their effectiveness.
As a general rule, the fully inserted fuel assemblies were kept close to the center of the
core to provide reactivity compensation where the neutron flux is naturally largest. Not only
does this limit the potential peaking factors, but it also increases the effectiveness of the
control rods since they are placed in high flux environments. The critical rod bank at the last
stages of the core cycle (from 23.5 – 30.0 MWd/Kg) were placed closer to the center of the
core since at this point there are very few to no other fuel assemblies with fully inserted
control rods. Placing the critical rod bank in the center increases their effectiveness.
Figure 99 shows the axial offset and control rod insertion percentage vs burnup. The
first two stages of burnup that cover the first 17.5 MWd/Kg of burnup provide a balanced and
controlled axial offset profile. Limiting the critical rod bank to just 4 fuel assemblies has
151
reduced their negative impact on the axial power offset. While the axial offset is still slightly
skewed toward negative values, it is contained within a band of ±0.4 throughout lifetime.
The core requires four more depletion steps after 17.5 MWd/Kg, largely due
increasingly ineffective burnable poisons that are nearing complete depletion. Nevertheless,
careful management of the depletion steps has still maintained the axial offset within a ±0.4
band.
Boron Free Core with Advanced CRD Algorithm
0.8
Boron Free Core with CRD Algorithm
Axial Power Offset
0.6
1
0.9
0.8
0.4
0.7
0.2
0.6
0.5
0
-0.2
0
5
10
15
20
25
30
0.4
-0.4
0.3
-0.6
0.2
-0.8
0.1
-1
Burnup (MWd/Kg)
Control Rod Insertion Percentage
1
0
Figure 99: Axial offset and control rod insertion percentage vs burnup for the final control rod
algorithm.
Once again we can also see how the control rod movement mirrors the behavior of the
axial offset. Peaks and spikes in the axial offset coincide perfectly with the relative insertion
percentage of the critical rod band, demonstrating once again the link between the two.
Figure 100 shows the maximum peaking factor vs burnup for this specific control rod
algorithm. Here we can see how finally managing the axial offset has produced significantly
lower peaking factors at BOC, even outperforming an identical SMR core that employs
soluble boron instead of the above control rod algorithm. It is not until 22 MWd/Kg that the
soluble boron-free core with this control rod algorithm begins to experience higher peaking
factors. Once again, at this point the burnable poisons have largely depleted and are
increasingly ineffective, which gives rise to the potential for higher peaking factors due to this
loss of reactivity suppression.
152
7
Boron Free Core with Advanced CRD Algorithm
Maximum Pin Peaking Factor
6
Soluble Boron Core
5
4
3
2
1
0
5
10
15
20
25
30
Burnup (MWd/Kg)
Figure 100: Maximum pin peaking factor vs burnup for the final control rod algorithm.
Nevertheless, the peaking factors are maintained within an acceptable range of a soluble
boron core for the entire core cycle according to the general limits provided in Section 3.2.2.
Couple this with the axial offset that is maintained under ±0.4, and the design requirements
listed in Chapter 3 are close to being completely met.
The last element is an exact calculation of the MDNBR, which would provide a
quantifiable measure of the ability to control power peaks through this control rod algorithm.
With that in mind, the maximum peaking factor occurs at the very end of the core’s lifetime,
where a pin the central fuel assembly contained a peaking factor of 3.99.
At this depletion stage, the specific peak pin produced 1769.6 KW/m2 in the 20th axial
node. Using the guidelines described in Section 3.2.2, this correlates to a MDNBR of:
𝑀𝐷𝑁𝐵𝑅 =
2762 𝐾𝑊/𝑚2
2762 𝐾𝑊/𝑚2
=
= 1.56
𝑞 ′′
1769.9 𝐾𝑊/𝑚2
Since 1.56 > 1.4, the specific MDNBR limits are preserved at this specific state point.
However, a thorough examination of every heat flux value at all depletion steps confirms that
1769.6 KW/m2 is the global maximum. This satisfies MDNBR requirements.
153
Chapter 7 – Conclusions
The efforts outlined in Chapter 5 and Chapter 6 describes two different strategies for
running without soluble boron in a prototypical SMR. Removing soluble boron placed
increased dependence on control rods and burnable poisons for reactivity compensation, and
the differences in how both control rods and burnable poisons were utilized in the core
produced distinctly different operational profiles.
The strategies outlined in Chapter 5 describe the use of burnable poisons to manage the
axial power profile throughout burnup. The difficulties in managing the axial power profile
arise from the large amount of reactivity associated with the critical rod bank, and its
subsequent partial insertion in the core. Since control rods are inserted form the top down,
large concentrations of poisons were placed in the bottom of the core to provide a more
uniform reactivity compensation profile axially throughout the core.
This strategy led to difficulties due to the transient nature of the reactor core. As U235
naturally depletes, the required amount of reactivity compensation is also reduced, prompting
active control rod movement. Coupling this with the natural depletion of burnable poisons,
and the overall reactivity profile throughout the core was unsteady. Thus, while the control
rods and burnable poisons could be engineered to produce a proper axial power profile at
BOC, the results did not last for long. The depleting burnable poisons and continuous control
rod movement consistently resulted in an axial power profile that was significantly skewed
toward the bottom half of the core by MOC, before steadily rising to be significantly skewed
toward the top half of the core by EOC.
Despite several different strategies to contain the axial power profile at MOC and EOC,
the steady depletion of burnable poisons led to an inability to provide sufficient reactivity
compensation by MOC. The poisons had simply depleted too much by MOC, and any efforts
to increase the overall poisoning by MOC inevitably meant increased poisoning at BOC which
resulted in adverse and unacceptable effects on core performance at BOC.
This inherent problem led to a search for alternate strategies for operating a SMR
without soluble boron. The first strategy suffered from a large amount of reactivity inherent to
the critical rod bank, prompting the use of strong burnable poisons to offset partial insertion of
this bank. To avoid the complications that arose from the first strategy the amount of reactivity
154
in the critical rod bank was significantly reduced. In this manner, the critical rod bank’s effect
on the axial power profile arising from partial insertion was also reduced.
Chapter 6 outlined the complications and results from a strategy based on reducing the
reactivity associated with the critical rod bank. The study found that, if done properly, the
axial offset and resultant maximum peaking factors could meet design requirements outlined
in Chapter 3. The first strategy (Chapter 5) resulted in peaking factors that were acceptable,
but an axial power profile that was unacceptable. Thus, the method described in Chapter 6
delivers the most promise for effectively operating a prototypical SMR without soluble boron.
To demonstrate these results, Figures 101 and 102 compare the axial power offset and
the maximum peaking factor vs burnup for the best results from the first and second strategies
(Chapter 5 and Chapter 6, respectively), and with a traditional SMR that operates with soluble
boron.
1
Boron Free Core with Axially Graded Burnable Poisons
0.8
Boron Free Core with Advanced CRD Algorithm
0.6
Soluble Boron Core
Axial Power Offset
0.4
0.2
0
0
5
10
15
20
25
30
-0.2
-0.4
-0.6
-0.8
-1
Burnup (MWd/Kg)
Figure 101: Axial offset vs burnup for the boron-free core with axially graded burnable
poisons, the boron-free core with the final control rod algorithm, and for a soluble boron core.
155
4
Maximum Pin Peaking Factor
3.5
3
2.5
2
Boron Free Core with Axially Graded Burnable Poisons
1.5
Boron Free Core with Advanced CRD Algorithm
Soluble Boron Core
1
0
5
10
15
20
25
30
Burnup (MWD/KG)
Figure 102: Maximum pin peaking factor vs burnup for the boron-free core with axially
graded burnable poisons, the boron-free core with the final control rod algorithm, and for a
soluble boron core.
Reducing the reactivity worth associated with the critical rod bank produced the best
results with respect to the axial power profile and the maximum peaking factors. It is
important to note that this study did not attempt to provide an ideal core, it only attempted to
demonstrate the feasibility of soluble boron-free operation in a prototypical SMR. The
research identified the most important factors in operation (axial power profile and maximum
peaking factors), and provided results with respect to these factors. In this respect, further
improvements can be realized through a comprehensive study based on the strategy entailed in
Chapter 6.
Further insight into the differences in the physical characteristics between a core with
and without soluble boron provided further evidence toward the increased safety inherent in
soluble boron-free designs. Most of these safety factors arise from neutronic characteristics
due to the lack of a strong thermal absorber (boron). Further density effects in the moderator
and an increase in plutonium production provide improved reactivity coefficients, bolstering
156
the inherent natural stability of the reactor. These effects combine to make a boron-free SMR
an attractive possibility for utilities seeking installation in previously unreached markets.
7.1 Future Work
7.1.1 Further Control Rod Algorithms and Axial Loading Strategies
This study on soluble boron-free operation was never meant to be an optimization
study. While several distinct advantages and strategies related to boron free operation have
been identified, much work remains to be done. The current landscape of SMRs identifies a
few current boron-free designs. While specifics regarding their operational strategy remain
proprietary, further work can be done to develop the advanced control rod algorithm into a
proven design strategy for soluble boron-free operation.
To accomplish this, it should be noted that this study primarily sheds light on the
immense difficulty of controlling the axial power profile throughout burnup for a soluble
boron-free core. The two main strategies used to control the axial power profile are explored
independent of each other. However, some combination of the two could result in a further
improved axial power profile and reduced pin peaking factors.
Due to the better performance of the control rod algorithm approach, this combination
would be expected to employ a further refined control rod algorithm as a foundational
strategy. Employing additional axially graded burnable poisons or U235 enrichment loading
profiles could bring increased performance and further extended lifetimes.
7.1.2 Gadolinia-Oxide Burnable Poison Pellets
The shortcomings behind axially graded burnable poisons arose primarily due to an
inability to provide sufficient reactivity suppression throughout MOC. Since the current scope
of burnable poisons have steady depletion effects, any poisoning scheme that attempts to
provide sufficient MOC suppression would inevitably result in over-poisoning at BOC.
One potential strategy to provide sufficient poisoning at MOC includes making use of
strong self-shielding characteristics inherent to pellets of Gd2O3 that are discretely placed
within fuel pins (not homogeneously mixed) [22]. In this manner, the pellets would act as
strong neutron absorbers with very strong shielding effects.
157
Essentially, the small pellet size could reduce the poisoning impact at BOC while the
shielding effects could extend the effective poisoning lifetime well into EOC. While designing
and modeling such a scenario would be challenging, the impact on soluble boron-free
operation could bring enhanced performance.
7.1.3 Partial Elimination of Soluble Boron
The benefits inherent to total elimination of soluble boron include simplification of
plant operation, elimination of corrosive effects, reduction of radioactive waste volumes and
the associated CVCS functions, and elimination of potential boron-dilution accidents.
However, all of these benefits would also be realized in the partial elimination of soluble
boron.
In partial elimination, a reduced amount of soluble boron is kept in the coolant. There
is no variation to the amount of boron so there would be no need for active CVCS functions,
bringing additional plant simplification. The reduction of boron would bring both reduced
corrosive effects and mitigated dilution accidents.
To some extent, partial elimination is a middle ground between active soluble boron
dilution and complete elimination. The effects are still felt, but they are minimized to some
extent. Furthermore, the burden on control rods and burnable poisons are still increased,
bringing with it complications in controlling the axial power profile throughout burnup.
However, perhaps the greatest application of partial elimination comes from current SMR
designs that employ multiple reactors in a single building. In such scenarios, a single control
room is tasked with controlling and operating multiple units. If each of these reactors actively
employs soluble boron then a single team of reactor operators managing multiple units with
different concentrations of soluble boron would create a strong potential for confusion.
With a constant level of soluble boron in the core, not only are the benefits of reduced
boron realized, but it also avoids complications involved with such postulated accident
scenarios.
158
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167
Appendix
The following appendix details axial loading geometry for each core listed in Chapter
5. Both the average burnable poison loading (in grams) and the U235 enrichment loading in
each assembly and for each 25 axial nodes are given.
168
Average Burnable Poison Loading (grams) per Node for 1st Axial Core
0
0
0
0
9.603
9.603
9.603
0
0
0
0
0
11.32
11.32
11.32
0
0
0
0
0
11.32
11.32
11.32
0
0
0
0
0
9.603
9.603
9.603
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 9.603 9.603 9.603 0
11.32 9.603 9.603 9.603 11.32
9.603 7.545 14.4 7.545 9.603
9.603 14.4 7.545 14.4 9.603
9.603 7.545 14.4 7.545 9.603
11.32 9.603 9.603 9.603 11.32
0 9.603 9.603 9.603 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 11.32 11.32 11.32 0
11.32 11.32 11.32 11.32 11.32
11.32 7.545 14.4 7.545 11.32
11.32 14.4 9.603 14.4 11.32
11.32 7.545 14.4 7.545 11.32
11.32 11.32 11.32 11.32 11.32
0 11.32 11.32 11.32 0
0
0
0
Node 7: 48-56 cm
0
0
0
0 11.32 11.32 11.32 0
11.32 11.32 11.32 11.32 11.32
11.32 7.545 14.4 7.545 11.32
11.32 14.4 9.603 14.4 11.32
11.32 7.545 14.4 7.545 11.32
11.32 11.32 11.32 11.32 11.32
0 11.32 11.32 11.32 0
0
0
0
Node 10: 72-80 cm
0
0
0
0 9.603 9.603 9.603 0
11.32 4.801 4.801 4.801 11.32
4.801 9.603 11.32 9.603 4.801
4.801 11.32 4.801 11.32 4.801
4.801 9.603 11.32 9.603 4.801
11.32 4.801 4.801 4.801 11.32
0 9.603 9.603 9.603 0
0
0
0
Node 13: 96-104 cm
0
0
0
0
0
0
0
0
0
9.603 0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
9.603
9.603
9.603
0
0
0
0
0
0
0
0
9.603
9.603
9.603
0
0
11.32
11.32
11.32
0
0
0
0
0
0
0
0
11.32
11.32
11.32
0
0
11.32
11.32
11.32
0
0
0
0
0
0
0
0
9.603
9.603
9.603
0
0
9.603
9.603
9.603
0
0
0
0
0
0
0
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 9.603 9.603 9.603 0
11.32 11.32 11.32 11.32 11.32
11.32 7.545 14.4 7.545 11.32
11.32 14.4 7.545 14.4 11.32
11.32 7.545 14.4 7.545 11.32
11.32 11.32 11.32 11.32 11.32
0 9.603 9.603 9.603 0
0
0
0
Node 5: 32-40 cm
0
0
0
0 11.32 11.32 11.32 0
11.32 11.32 11.32 11.32 11.32
11.32 11.32 14.4 11.32 11.32
11.32 14.4 9.603 14.4 11.32
11.32 11.32 14.4 11.32 11.32
11.32 11.32 11.32 11.32 11.32
0 11.32 11.32 11.32 0
0
0
0
Node 8: 56-64 cm
0
0
0
0 9.603 9.603 9.603 0
11.32 9.603 9.603 9.603 11.32
9.603 7.545 11.32 7.545 9.603
9.603 11.32 7.545 11.32 9.603
9.603 7.545 11.32 7.545 9.603
11.32 9.603 9.603 9.603 11.32
0 9.603 9.603 9.603 0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 4.801 4.801 0
7.545 4.801 4.801 4.801 7.545
4.801 9.603 11.32 9.603 4.801
4.801 11.32 4.801 11.32 4.801
4.801 9.603 11.32 9.603 4.801
7.545 4.801 4.801 4.801 7.545
0 4.801 4.801 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0 9.603
9.603 0
0
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
0
0 9.603
9.603 0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
0
0 9.603
9.603 0
0
0
0
0
0
0
0
0
0
9.603
9.603
9.603
0
0
0
0
0
0
0
0
11.32
11.32
11.32
0
0
11.32
11.32
11.32
0
0
0
0
0
0
0
0
11.32
11.32
11.32
0
0
9.603
9.603
9.603
0
0
0
0
0
0
0
0
9.603
9.603
9.603
0
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 11.32 11.32 11.32 0
11.32 11.32 11.32 11.32 11.32
11.32 7.545 14.4 7.545 11.32
11.32 14.4 9.603 14.4 11.32
11.32 7.545 14.4 7.545 11.32
11.32 11.32 11.32 11.32 11.32
0 11.32 11.32 11.32 0
0
0
0
Node 6: 40-48 cm
0
0
0
0 11.32 11.32 11.32 0
11.32 11.32 11.32 11.32 11.32
11.32 7.545 14.4 7.545 11.32
11.32 14.4 9.603 14.4 11.32
11.32 7.545 14.4 7.545 11.32
11.32 11.32 11.32 11.32 11.32
0 11.32 11.32 11.32 0
0
0
0
Node 9: 64-72 cm
0
0
0
0 9.603 9.603 9.603 0
11.32 9.603 9.603 9.603 11.32
9.603 7.545 11.32 7.545 9.603
9.603 11.32 7.545 11.32 9.603
9.603 7.545 11.32 7.545 9.603
11.32 9.603 9.603 9.603 11.32
0 9.603 9.603 9.603 0
0
0
0
Node 12: 88-96 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
0
0 9.603
9.603 0
0
0
0
0
0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 4.801 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Figure 103: Average burnable poison loading (grams) per node for the 1st core
0
11.32
11.32
11.32
0
0
0
0
0
11.32
11.32
11.32
0
0
0
0
0
9.603
9.603
9.603
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
169
Fuel Assembly U235 Enrichment per Node for 1st Axial Core
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.00 4.00 3.00
4.00 3.00 4.00
3.00 4.00 3.00
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.00
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.50 3.50 3.50
3.50 3.00 3.50
3.50 3.50 3.50
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 3.50 4.00
3.50 3.50 3.50
3.00 4.00 3.00
4.00 3.00 4.00
3.00 4.00 3.00
3.50 3.50 3.50
4.00 3.50 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 3.50 3.50 3.50 2.50
3.50 3.00 3.00 3.00 3.50
3.00 2.50 3.00 2.50 3.00
3.00 3.00 2.50 3.00 3.00
3.00 2.50 3.00 2.50 3.00
3.50 3.00 3.00 3.00 3.50
2.50 3.50 3.50 3.50 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 3.50 3.50 3.50 2.50
3.50 3.00 3.00 3.00 3.50
3.00 2.50 3.00 2.50 3.00
3.00 3.00 2.50 3.00 3.00
3.00 2.50 3.00 2.50 3.00
3.50 3.00 3.00 3.00 3.50
2.50 3.50 3.50 3.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.00 4.00 4.00 4.00 4.00
4.00 3.50 3.50 3.50 4.00
4.00 3.50 3.00 3.50 4.00
4.00 3.50 3.50 3.50 4.00
4.00 4.00 4.00 4.00 4.00
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Figure 104: Fuel assembly U235 enrichment per node for the 1st core.
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
170
Average Burnable Poison Loading (grams) per Node for 2nd Axial Core
0
0
0
0
9.603
9.603
9.603
0
0
0
0
0
11.32
11.32
11.32
0
0
0
0
0
11.32
11.32
11.32
0
0
0
0
0
9.603
9.603
9.603
0
0
0
0
0
7.545
7.545
7.545
0
0
0
0
0
7.545
7.545
7.545
0
0
0
0
0
7.545
7.545
7.545
0
0
0
0
0
7.545
7.545
7.545
0
Node 1: 0-8 cm
0
0
0
0 9.603 9.603 9.603 0
11.32 9.603 9.603 9.603 11.32
9.603 7.545 14.4 7.545 9.603
9.603 14.4 7.545 14.4 9.603
9.603 7.545 14.4 7.545 9.603
11.32 9.603 9.603 9.603 11.32
0 9.603 9.603 9.603 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 11.32 11.32 11.32 0
11.32 11.32 11.32 11.32 11.32
11.32 7.545 14.4 7.545 11.32
11.32 14.4 9.603 14.4 11.32
11.32 7.545 14.4 7.545 11.32
11.32 11.32 11.32 11.32 11.32
0 11.32 11.32 11.32 0
0
0
0
Node 7: 48-56 cm
0
0
0
0 11.32 11.32 11.32 0
11.32 11.32 11.32 11.32 11.32
11.32 7.545 14.4 7.545 11.32
11.32 14.4 9.603 14.4 11.32
11.32 7.545 14.4 7.545 11.32
11.32 11.32 11.32 11.32 11.32
0 11.32 11.32 11.32 0
0
0
0
Node 10: 72-80 cm
0
0
0
0 9.603 9.603 9.603 0
11.32 4.801 4.801 4.801 11.32
4.801 9.603 11.32 9.603 4.801
4.801 11.32 4.801 11.32 4.801
4.801 9.603 11.32 9.603 4.801
11.32 4.801 4.801 4.801 11.32
0 9.603 9.603 9.603 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 7.545 7.545 7.545 0
9.603 7.545 7.545 7.545 9.603
7.545 9.603 11.32 9.603 7.545
7.545 11.32 4.801 11.32 7.545
7.545 9.603 11.32 9.603 7.545
9.603 7.545 7.545 7.545 9.603
0 7.545 7.545 7.545 0
0
0
0
Node 16: 120-128 cm
0
0
0
0 7.545 7.545 7.545 0
9.603 7.545 7.545 7.545 9.603
7.545 9.603 11.32 9.603 7.545
7.545 11.32 4.801 11.32 7.545
7.545 9.603 11.32 9.603 7.545
9.603 7.545 7.545 7.545 9.603
0 7.545 7.545 7.545 0
0
0
0
Node 19: 144-152 cm
0
0
0
0 7.545 7.545 7.545 0
9.603 7.545 7.545 7.545 9.603
7.545 9.603 11.32 9.603 7.545
7.545 11.32 4.801 11.32 7.545
7.545 9.603 11.32 9.603 7.545
9.603 7.545 7.545 7.545 9.603
0 7.545 7.545 7.545 0
0
0
0
Node 22: 168-176 cm
0
0
0
0 7.545 7.545 7.545 0
9.603 7.545 7.545 7.545 9.603
7.545 9.603 11.32 9.603 7.545
7.545 11.32 4.801 11.32 7.545
7.545 9.603 11.32 9.603 7.545
9.603 7.545 7.545 7.545 9.603
0 7.545 7.545 7.545 0
0
0
0
0
9.603
9.603
9.603
0
0
0
0
0
0
0
0
9.603
9.603
9.603
0
0
11.32
11.32
11.32
0
0
0
0
0
0
0
0
11.32
11.32
11.32
0
0
11.32
11.32
11.32
0
0
0
0
0
0
0
0
9.603
9.603
9.603
0
0
9.603
9.603
9.603
0
0
0
0
0
0
0
0
4.801
4.801
4.801
0
0
7.545
7.545
7.545
0
0
0
0
0
0
0
0
7.545
7.545
7.545
0
0
7.545
7.545
7.545
0
0
0
0
0
0
0
0
7.545
7.545
7.545
0
0
7.545
7.545
7.545
0
0
0
0
0
0
0
0
7.545
7.545
7.545
0
0
7.545
7.545
7.545
0
0
0
0
0
0
0
0
7.545
7.545
7.545
0
Node 2: 8-16 cm
0
0
0
0 9.603 9.603 9.603 0
11.32 11.32 11.32 11.32 11.32
11.32 7.545 14.4 7.545 11.32
11.32 14.4 7.545 14.4 11.32
11.32 7.545 14.4 7.545 11.32
11.32 11.32 11.32 11.32 11.32
0 9.603 9.603 9.603 0
0
0
0
Node 5: 32-40 cm
0
0
0
0 11.32 11.32 11.32 0
11.32 11.32 11.32 11.32 11.32
11.32 11.32 14.4 11.32 11.32
11.32 14.4 9.603 14.4 11.32
11.32 11.32 14.4 11.32 11.32
11.32 11.32 11.32 11.32 11.32
0 11.32 11.32 11.32 0
0
0
0
Node 8: 56-64 cm
0
0
0
0 9.603 9.603 9.603 0
11.32 9.603 9.603 9.603 11.32
9.603 7.545 11.32 7.545 9.603
9.603 11.32 7.545 11.32 9.603
9.603 7.545 11.32 7.545 9.603
11.32 9.603 9.603 9.603 11.32
0 9.603 9.603 9.603 0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 4.801 4.801 0
7.545 4.801 4.801 4.801 7.545
4.801 9.603 11.32 9.603 4.801
4.801 11.32 4.801 11.32 4.801
4.801 9.603 11.32 9.603 4.801
7.545 4.801 4.801 4.801 7.545
0 4.801 4.801 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0 7.545 7.545 7.545 0
9.603 7.545 7.545 7.545 9.603
7.545 9.603 11.32 9.603 7.545
7.545 11.32 4.801 11.32 7.545
7.545 9.603 11.32 9.603 7.545
9.603 7.545 7.545 7.545 9.603
0 7.545 7.545 7.545 0
0
0
0
Node 17: 128-136 cm
0
0
0
0 7.545 7.545 7.545 0
9.603 7.545 7.545 7.545 9.603
7.545 9.603 11.32 9.603 7.545
7.545 11.32 4.801 11.32 7.545
7.545 9.603 11.32 9.603 7.545
9.603 7.545 7.545 7.545 9.603
0 7.545 7.545 7.545 0
0
0
0
Node 20: 152-160 cm
0
0
0
0 7.545 7.545 7.545 0
9.603 7.545 7.545 7.545 9.603
7.545 9.603 11.32 9.603 7.545
7.545 11.32 4.801 11.32 7.545
7.545 9.603 11.32 9.603 7.545
9.603 7.545 7.545 7.545 9.603
0 7.545 7.545 7.545 0
0
0
0
Node 23: 176-184 cm
0
0
0
0 7.545 7.545 7.545 0
9.603 7.545 7.545 7.545 9.603
7.545 9.603 11.32 9.603 7.545
7.545 11.32 4.801 11.32 7.545
7.545 9.603 11.32 9.603 7.545
9.603 7.545 7.545 7.545 9.603
0 7.545 7.545 7.545 0
0
0
0
0
9.603
9.603
9.603
0
0
0
0
0
0
0
0
11.32
11.32
11.32
0
0
11.32
11.32
11.32
0
0
0
0
0
0
0
0
11.32
11.32
11.32
0
0
9.603
9.603
9.603
0
0
0
0
0
0
0
0
9.603
9.603
9.603
0
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
7.545
7.545
7.545
0
0
7.545
7.545
7.545
0
0
0
0
0
0
0
0
7.545
7.545
7.545
0
0
7.545
7.545
7.545
0
0
0
0
0
0
0
0
7.545
7.545
7.545
0
0
7.545
7.545
7.545
0
0
0
0
0
0
0
0
7.545
7.545
7.545
0
0
7.545
7.545
7.545
0
0
0
0
0
0
0
0
7.545
7.545
7.545
0
Node 3: 16-24 cm
0
0
0
0 11.32 11.32 11.32 0
11.32 11.32 11.32 11.32 11.32
11.32 7.545 14.4 7.545 11.32
11.32 14.4 9.603 14.4 11.32
11.32 7.545 14.4 7.545 11.32
11.32 11.32 11.32 11.32 11.32
0 11.32 11.32 11.32 0
0
0
0
Node 6: 40-48 cm
0
0
0
0 11.32 11.32 11.32 0
11.32 11.32 11.32 11.32 11.32
11.32 7.545 14.4 7.545 11.32
11.32 14.4 9.603 14.4 11.32
11.32 7.545 14.4 7.545 11.32
11.32 11.32 11.32 11.32 11.32
0 11.32 11.32 11.32 0
0
0
0
Node 9: 64-72 cm
0
0
0
0 9.603 9.603 9.603 0
11.32 9.603 9.603 9.603 11.32
9.603 7.545 11.32 7.545 9.603
9.603 11.32 7.545 11.32 9.603
9.603 7.545 11.32 7.545 9.603
11.32 9.603 9.603 9.603 11.32
0 9.603 9.603 9.603 0
0
0
0
Node 12: 88-96 cm
0
0
0
0 7.545 7.545 7.545 0
9.603 7.545 7.545 7.545 9.603
7.545 9.603 11.32 9.603 7.545
7.545 11.32 4.801 11.32 7.545
7.545 9.603 11.32 9.603 7.545
9.603 7.545 7.545 7.545 9.603
0 7.545 7.545 7.545 0
0
0
0
Node 15: 112-120 cm
0
0
0
0 7.545 7.545 7.545 0
9.603 7.545 7.545 7.545 9.603
7.545 9.603 11.32 9.603 7.545
7.545 11.32 4.801 11.32 7.545
7.545 9.603 11.32 9.603 7.545
9.603 7.545 7.545 7.545 9.603
0 7.545 7.545 7.545 0
0
0
0
Node 18: 136-144 cm
0
0
0
0 7.545 7.545 7.545 0
9.603 7.545 7.545 7.545 9.603
7.545 9.603 11.32 9.603 7.545
7.545 11.32 4.801 11.32 7.545
7.545 9.603 11.32 9.603 7.545
9.603 7.545 7.545 7.545 9.603
0 7.545 7.545 7.545 0
0
0
0
Node 21: 160-168 cm
0
0
0
0 7.545 7.545 7.545 0
9.603 7.545 7.545 7.545 9.603
7.545 9.603 11.32 9.603 7.545
7.545 11.32 4.801 11.32 7.545
7.545 9.603 11.32 9.603 7.545
9.603 7.545 7.545 7.545 9.603
0 7.545 7.545 7.545 0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0 7.545 7.545 7.545 0
9.603 7.545 7.545 7.545 9.603
7.545 9.603 11.32 9.603 7.545
7.545 11.32 4.801 11.32 7.545
7.545 9.603 11.32 9.603 7.545
9.603 7.545 7.545 7.545 9.603
0 7.545 7.545 7.545 0
0
0
0
Figure 105: Average burnable poison loading (grams) per node for the 2nd core.
0
11.32
11.32
11.32
0
0
0
0
0
11.32
11.32
11.32
0
0
0
0
0
9.603
9.603
9.603
0
0
0
0
0
7.545
7.545
7.545
0
0
0
0
0
7.545
7.545
7.545
0
0
0
0
0
7.545
7.545
7.545
0
0
0
0
0
7.545
7.545
7.545
0
0
0
0
0
7.545
7.545
7.545
0
0
0
0
171
Fuel Assembly U235 Enrichment per Node for 2nd Axial Core
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.00 4.00 3.00
4.00 3.00 4.00
3.00 4.00 3.00
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.00
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.50 3.50 3.50
3.50 3.00 3.50
3.50 3.50 3.50
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 3.50 4.00
3.50 3.50 3.50
3.00 4.00 3.00
4.00 3.00 4.00
3.00 4.00 3.00
3.50 3.50 3.50
4.00 3.50 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 3.50 3.50 3.50 2.50
3.50 3.00 3.00 3.00 3.50
3.00 2.50 3.00 2.50 3.00
3.00 3.00 2.50 3.00 3.00
3.00 2.50 3.00 2.50 3.00
3.50 3.00 3.00 3.00 3.50
2.50 3.50 3.50 3.50 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 3.50 3.50 3.50 2.50
3.50 3.00 3.00 3.00 3.50
3.00 2.50 3.00 2.50 3.00
3.00 3.00 2.50 3.00 3.00
3.00 2.50 3.00 2.50 3.00
3.50 3.00 3.00 3.00 3.50
2.50 3.50 3.50 3.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.00 4.00 4.00 4.00 4.00
4.00 3.50 3.50 3.50 4.00
4.00 3.50 3.00 3.50 4.00
4.00 3.50 3.50 3.50 4.00
4.00 4.00 4.00 4.00 4.00
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Figure 106: Fuel assembly U235 enrichment per node for the 2nd core.
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
172
Average Burnable Poison Loading (grams) per Node for 3rd Axial Core
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 4: 24-32 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0 9.603 0
0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 13: 96-104 cm
0
0
0
0
0
0 9.603 0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0 9.603
9.603 0
0
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0
0
0 9.603 0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0 9.603 0
0
0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
0
0 9.603
9.603 0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Figure 107: Average burnable poison loading (grams) per node for the 3rd core.
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
173
Fuel Assembly U235 Enrichment per Node for 3rd Axial Core
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Figure 108: Fuel assembly U235 enrichment per node for the 3rd core.
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
174
Average Burnable Poison Loading (grams) per Node for 4th Axial Core
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0
0 9.603 0
0
0
0 4.801 7.545 4.801 0
0
0 4.801 7.545 7.545 7.545 4.801 0
9.603 7.545 7.545 11.32 7.545 7.545 9.603
0 4.801 7.545 7.545 7.545 4.801 0
0
0
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 4: 24-32 cm
0
0
0
0
0 9.603 0
0
0
0 4.801 7.545 4.801 0
0
0 4.801 7.545 7.545 7.545 4.801 0
9.603 7.545 7.545 11.32 7.545 7.545 9.603
0 4.801 7.545 7.545 7.545 4.801 0
0
0 4.801 7.545 4.801 0
0
0
0 9.603 0
0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0
0 4.801 7.545 4.801 0
0
0 4.801 7.545 7.545 7.545 4.801 0
9.603 7.545 7.545 11.32 7.545 7.545 9.603
0 4.801 7.545 7.545 7.545 4.801 0
0
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0
0
0
0
0
0 9.603 0
0
0 9.603 0
0
0 9.603 11.32 9.603 0
0
0
0 11.32 0 11.32 0
0
0
0 9.603 11.32 9.603 0
0
0 9.603 0
0
0 9.603 0
0
0
0
0
0
0
0
0
Node 13: 96-104 cm
0
0
0
0
0
0
0
0
0
0 9.603 0
0 9.603 0
0 9.603 11.32 9.603 0
0
0
0
0 11.32 0 11.32 0
0
0
0 9.603 11.32 9.603 0
0
0 9.603 0
0
0 9.603 0
0
0
0
0
0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0 9.603 0
0
0 9.603 0
0
0 9.603 11.32 9.603 0
0
0
0 11.32 0 11.32 0
0
0
0 9.603 11.32 9.603 0
0
0 9.603 0
0
0 9.603 0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0 9.603 0
0 9.603 0
0
0
0 9.603 11.32 9.603 0
0
0
0 11.32 0 11.32 0
0
0
0 9.603 11.32 9.603 0
0
0 9.603 0
0
0 9.603 0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0 9.603 0
0
0 9.603 0
0
0 9.603 11.32 9.603 0
0
0
0 11.32 0 11.32 0
0
0
0
0 9.603 11.32 9.603 0
0 9.603 0
0
0 9.603 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0
0 9.603 0
0
0
0
0 4.801 7.545 4.801 0
0 4.801 7.545 7.545 7.545 4.801 0
9.603 7.545 7.545 11.32 7.545 7.545 9.603
0 4.801 7.545 7.545 7.545 4.801 0
0
0 4.801 7.545 4.801 0
0
0
0 9.603 0
0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0
0 4.801 7.545 4.801 0
0
0 4.801 7.545 7.545 7.545 4.801 0
9.603 7.545 7.545 11.32 7.545 7.545 9.603
0 4.801 7.545 7.545 7.545 4.801 0
0
0 4.801 7.545 4.801 0
0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0
0 4.801 7.545 4.801 0
0
0 4.801 7.545 7.545 7.545 4.801 0
9.603 7.545 7.545 11.32 7.545 7.545 9.603
0 4.801 7.545 7.545 7.545 4.801 0
0
0
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0
0
0
0
0
0 9.603 0
0 9.603 0
0
0
0
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0
0
0
0
0 9.603 11.32 9.603 0
0
0 9.603 0
0 9.603 0
0
0
0
0
0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0 9.603 0
0
0 9.603 0
0
0
0 9.603 11.32 9.603 0
0
0
0 11.32 0 11.32 0
0
0
0 9.603 11.32 9.603 0
0
0 9.603 0
0 9.603 0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0 9.603 0
0
0 9.603 0
0
0 9.603 11.32 9.603 0
0
0
0 11.32 0 11.32 0
0
0
0 9.603 11.32 9.603 0
0
0 9.603 0
0
0 9.603 0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0 9.603 0
0
0 9.603 0
0
0
0 9.603 11.32 9.603 0
0
0 11.32 0 11.32 0
0
0
0
0 9.603 11.32 9.603 0
0 9.603 0
0
0 9.603 0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0 9.603 0
0
0 9.603 0
0
0 9.603 11.32 9.603 0
0
0
0 11.32 0 11.32 0
0
0
0 9.603 11.32 9.603 0
0
0 9.603 0
0
0 9.603 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0
0 9.603 0
0
0
0 4.801 7.545 4.801 0
0
0 4.801 7.545 7.545 7.545 4.801 0
9.603 7.545 7.545 11.32 7.545 7.545 9.603
0 4.801 7.545 7.545 7.545 4.801 0
0
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0
0 4.801 7.545 4.801 0
0
0 4.801 7.545 7.545 7.545 4.801 0
9.603 7.545 7.545 11.32 7.545 7.545 9.603
0 4.801 7.545 7.545 7.545 4.801 0
0
0 4.801 7.545 4.801 0
0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0
0
0 4.801 7.545 4.801 0
0 4.801 7.545 7.545 7.545 4.801 0
9.603 7.545 7.545 11.32 7.545 7.545 9.603
0 4.801 7.545 7.545 7.545 4.801 0
0 4.801 7.545 4.801 0
0
0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0
0
0
0
0
0 9.603 0
0
0 9.603 0
0
0
0 9.603 11.32 9.603 0
0
0
0 11.32 0 11.32 0
0
0
0 9.603 11.32 9.603 0
0 9.603 0
0 9.603 0
0
0
0
0
0
0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0 9.603 0
0
0 9.603 0
0
0 9.603 11.32 9.603 0
0
0
0 11.32 0 11.32 0
0
0
0 9.603 11.32 9.603 0
0
0 9.603 0
0
0 9.603 0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0 9.603 0
0
0 9.603 0
0
0 9.603 11.32 9.603 0
0
0
0 11.32 0 11.32 0
0
0
0 9.603 11.32 9.603 0
0
0 9.603 0
0
0 9.603 0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0 9.603 0
0
0 9.603 0
0
0 9.603 11.32 9.603 0
0
0
0 11.32 0 11.32 0
0
0
0 9.603 11.32 9.603 0
0
0
0 9.603 0
0 9.603 0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0 9.603 0
0
0 9.603 0
0
0 9.603 11.32 9.603 0
0
0
0 11.32 0 11.32 0
0
0
0 9.603 11.32 9.603 0
0
0 9.603 0
0
0 9.603 0
0
0
0
0
0
0
0
0
Figure 109: Average burnable poison loading (grams) per node for the 4th core
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
175
Fuel Assembly U235 Enrichment per Node for 4th Axial Core
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Figure 110: Fuel assembly U235 enrichment per node for the 4th core.
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
176
Average Burnable Poison Loading (grams) per Node for 5th Axial Core
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 4: 24-32 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0 9.603 0
0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 19: 144-152 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 17: 128-136 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0 9.603 0
0
0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 18: 136-144 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
0
0 9.603
9.603 0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Figure 111: Average burnable poison loading (grams) per node for the 5th core.
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
177
Fuel Assembly U235 Enrichment per Node for 5th Axial Core
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Figure 112: Fuel assembly U235 enrichment per node for the 5th core.
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
178
Average Burnable Poison Loading (grams) per Node for 6th Axial Core
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 19: 144-152 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
11.32
9.603
11.32
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 17: 128-136 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
0 9.603
9.603 0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 18: 136-144 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Figure 113: Average burnable poison loading (grams) per node for the 6th core.
0
11.32
9.603
11.32
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
179
Fuel Assembly U235 Enrichment per Node for 6th Axial Core
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Figure 114: Fuel assembly U235 enrichment per node for the 6th core.
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
180
Average Burnable Poison Loading (grams) per Node for 7th Axial Core
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 19: 144-152 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
11.32
9.603
11.32
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 17: 128-136 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
0 9.603
9.603 0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 18: 136-144 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Figure 115: Average burnable poison loading (grams) per node for the 7th core.
0
11.32
9.603
11.32
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
181
Fuel Assembly U235 Enrichment per Node for 7th Axial Core
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Figure 116: Fuel assembly U235 enrichment per node for the 7th core.
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
182
Average Burnable Poison Loading (grams) per Node for 8th Axial Core
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 19: 144-152 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
11.32
9.603
11.32
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 17: 128-136 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
0 9.603
9.603 0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 18: 136-144 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 117: Average burnable poison loading (grams) per node for the 8th core.
0
11.32
9.603
11.32
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
183
Fuel Assembly U235 Enrichment per Node for 8th Axial Core
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.50 3.50
4.50 3.00 4.50
3.50 4.50 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.50 3.50 3.50
3.50 4.50 3.00 4.50 3.50
3.50 3.50 4.50 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Figure 118: Fuel assembly U235 enrichment per node for the 8th core.
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
184
Average Burnable Poison Loading (grams) per Node for 9th Axial Core
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
11.32
9.603
11.32
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 119: Average burnable poison loading (grams) per node for the 9th core.
0
11.32
9.603
11.32
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
185
Fuel Assembly U235 Enrichment per Node for 9th Axial Core
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 3.00 3.00 3.00 2.50
3.00 2.50 2.50 2.50 3.00
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
3.00 2.50 2.50 2.50 3.00
2.50 3.00 3.00 3.00 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 3.00 3.00 3.00 2.50
3.00 2.50 2.50 2.50 3.00
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
3.00 2.50 2.50 2.50 3.00
2.50 3.00 3.00 3.00 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 3.00 3.00 3.00 2.50
3.00 2.50 2.50 2.50 3.00
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
3.00 2.50 2.50 2.50 3.00
2.50 3.00 3.00 3.00 2.50
2.50 2.50 2.50
Figure 120: Fuel assembly U235 enrichment per node for the 9th core.
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
186
Average Burnable Poison Loading (grams) per Node for 10th Axial Core
0
0
0
0
22.63
14.75
22.63
0
0
0
0
0
22.63
14.75
22.63
0
0
0
0
0
5.487
14.75
5.487
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 22.63 14.75 22.63 0
22.63 22.63 11.66 22.63 22.63
22.63 11.66 11.66 11.66 22.63
11.66 11.66 22.63 11.66 11.66
22.63 11.66 11.66 11.66 22.63
22.63 22.63 11.66 22.63 22.63
0 22.63 14.75 22.63 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 22.63 14.75 22.63 0
22.63 22.63 11.66 22.63 22.63
22.63 11.66 11.66 11.66 22.63
11.66 11.66 22.63 11.66 11.66
22.63 11.66 11.66 11.66 22.63
22.63 22.63 11.66 22.63 22.63
0 22.63 14.75 22.63 0
0
0
0
Node 7: 48-56 cm
0
0
0
0 5.487 14.75 5.487 0
5.487 8.574 11.66 8.574 5.487
8.574 11.66 11.66 11.66 8.574
11.66 11.66 22.63 11.66 11.66
8.574 11.66 11.66 11.66 8.574
5.487 8.574 11.66 8.574 5.487
0 5.487 14.75 5.487 0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
22.63
14.75
22.63
0
0
0
0
0
0
0
0
22.63
14.75
22.63
0
0
22.63
14.75
22.63
0
0
0
0
0
0
0
0
5.487
14.75
5.487
0
0
5.487
14.75
5.487
0
0
0
0
0
0
0
0
5.487
14.75
5.487
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 22.63 14.75 22.63 0
22.63 22.63 11.66 22.63 22.63
22.63 11.66 11.66 11.66 22.63
11.66 11.66 22.63 11.66 11.66
22.63 11.66 11.66 11.66 22.63
22.63 22.63 11.66 22.63 22.63
0 22.63 14.75 22.63 0
0
0
0
Node 5: 32-40 cm
0
0
0
0 5.487 14.75 5.487 0
5.487 8.574 11.66 8.574 5.487
8.574 11.66 11.66 11.66 8.574
11.66 11.66 22.63 11.66 11.66
8.574 11.66 11.66 11.66 8.574
5.487 8.574 11.66 8.574 5.487
0 5.487 14.75 5.487 0
0
0
0
Node 8: 56-64 cm
0
0
0
0 5.487 14.75 5.487 0
5.487 8.574 11.66 8.574 5.487
8.574 11.66 11.66 11.66 8.574
11.66 11.66 22.63 11.66 11.66
8.574 11.66 11.66 11.66 8.574
5.487 8.574 11.66 8.574 5.487
0 5.487 14.75 5.487 0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
22.63
14.75
22.63
0
0
0
0
0
0
0
0
22.63
14.75
22.63
0
0
5.487
14.75
5.487
0
0
0
0
0
0
0
0
5.487
14.75
5.487
0
0
5.487
14.75
5.487
0
0
0
0
0
0
0
0
5.487
14.75
5.487
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 22.63 14.75 22.63 0
22.63 22.63 11.66 22.63 22.63
22.63 11.66 11.66 11.66 22.63
11.66 11.66 22.63 11.66 11.66
22.63 11.66 11.66 11.66 22.63
22.63 22.63 11.66 22.63 22.63
0 22.63 14.75 22.63 0
0
0
0
Node 6: 40-48 cm
0
0
0
0 5.487 14.75 5.487 0
5.487 8.574 11.66 8.574 5.487
8.574 11.66 11.66 11.66 8.574
11.66 11.66 22.63 11.66 11.66
8.574 11.66 11.66 11.66 8.574
5.487 8.574 11.66 8.574 5.487
0 5.487 14.75 5.487 0
0
0
0
Node 9: 64-72 cm
0
0
0
0 5.487 14.75 5.487 0
5.487 8.574 11.66 8.574 5.487
8.574 11.66 11.66 11.66 8.574
11.66 11.66 22.63 11.66 11.66
8.574 11.66 11.66 11.66 8.574
5.487 8.574 11.66 8.574 5.487
0 5.487 14.75 5.487 0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 121: Average burnable poison loading (grams) per node for the 10th core.
0
22.63
14.75
22.63
0
0
0
0
0
5.487
14.75
5.487
0
0
0
0
0
5.487
14.75
5.487
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
187
Fuel Assembly U235 Enrichment per Node for 10th Axial Core
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 3.00 3.00 3.00 2.50
3.00 2.50 2.50 2.50 3.00
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
3.00 2.50 2.50 2.50 3.00
2.50 3.00 3.00 3.00 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 3.00 3.00 3.00 2.50
3.00 2.50 2.50 2.50 3.00
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
3.00 2.50 2.50 2.50 3.00
2.50 3.00 3.00 3.00 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 3.00 3.00 3.00 2.50
3.00 2.50 2.50 2.50 3.00
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
3.00 2.50 2.50 2.50 3.00
2.50 3.00 3.00 3.00 2.50
2.50 2.50 2.50
Figure 122: Fuel assembly U235 enrichment per node for the 10th core.
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
188
Average Burnable Poison Loading (grams) per Node for 11th Axial Core
0
0
0
0
22.63
14.75
22.63
0
0
0
0
0
22.63
14.75
22.63
0
0
0
0
0
5.487
14.75
5.487
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 22.63 14.75 22.63 0
22.63 22.63 11.66 22.63 22.63
22.63 11.66 11.66 11.66 22.63
11.66 11.66 22.63 11.66 11.66
22.63 11.66 11.66 11.66 22.63
22.63 22.63 11.66 22.63 22.63
0 22.63 14.75 22.63 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 22.63 14.75 22.63 0
22.63 22.63 11.66 22.63 22.63
22.63 11.66 11.66 11.66 22.63
11.66 11.66 22.63 11.66 11.66
22.63 11.66 11.66 11.66 22.63
22.63 22.63 11.66 22.63 22.63
0 22.63 14.75 22.63 0
0
0
0
Node 7: 48-56 cm
0
0
0
0 5.487 14.75 5.487 0
5.487 8.574 11.66 8.574 5.487
8.574 11.66 11.66 11.66 8.574
11.66 11.66 22.63 11.66 11.66
8.574 11.66 11.66 11.66 8.574
5.487 8.574 11.66 8.574 5.487
0 5.487 14.75 5.487 0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
22.63
14.75
22.63
0
0
0
0
0
0
0
0
22.63
14.75
22.63
0
0
22.63
14.75
22.63
0
0
0
0
0
0
0
0
5.487
14.75
5.487
0
0
5.487
14.75
5.487
0
0
0
0
0
0
0
0
5.487
14.75
5.487
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 22.63 14.75 22.63 0
22.63 22.63 11.66 22.63 22.63
22.63 11.66 11.66 11.66 22.63
11.66 11.66 22.63 11.66 11.66
22.63 11.66 11.66 11.66 22.63
22.63 22.63 11.66 22.63 22.63
0 22.63 14.75 22.63 0
0
0
0
Node 5: 32-40 cm
0
0
0
0 5.487 14.75 5.487 0
5.487 8.574 11.66 8.574 5.487
8.574 11.66 11.66 11.66 8.574
11.66 11.66 22.63 11.66 11.66
8.574 11.66 11.66 11.66 8.574
5.487 8.574 11.66 8.574 5.487
0 5.487 14.75 5.487 0
0
0
0
Node 8: 56-64 cm
0
0
0
0 5.487 14.75 5.487 0
5.487 8.574 11.66 8.574 5.487
8.574 11.66 11.66 11.66 8.574
11.66 11.66 22.63 11.66 11.66
8.574 11.66 11.66 11.66 8.574
5.487 8.574 11.66 8.574 5.487
0 5.487 14.75 5.487 0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
22.63
14.75
22.63
0
0
0
0
0
0
0
0
22.63
14.75
22.63
0
0
5.487
14.75
5.487
0
0
0
0
0
0
0
0
5.487
14.75
5.487
0
0
5.487
14.75
5.487
0
0
0
0
0
0
0
0
5.487
14.75
5.487
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 22.63 14.75 22.63 0
22.63 22.63 11.66 22.63 22.63
22.63 11.66 11.66 11.66 22.63
11.66 11.66 22.63 11.66 11.66
22.63 11.66 11.66 11.66 22.63
22.63 22.63 11.66 22.63 22.63
0 22.63 14.75 22.63 0
0
0
0
Node 6: 40-48 cm
0
0
0
0 5.487 14.75 5.487 0
5.487 8.574 11.66 8.574 5.487
8.574 11.66 11.66 11.66 8.574
11.66 11.66 22.63 11.66 11.66
8.574 11.66 11.66 11.66 8.574
5.487 8.574 11.66 8.574 5.487
0 5.487 14.75 5.487 0
0
0
0
Node 9: 64-72 cm
0
0
0
0 5.487 14.75 5.487 0
5.487 8.574 11.66 8.574 5.487
8.574 11.66 11.66 11.66 8.574
11.66 11.66 22.63 11.66 11.66
8.574 11.66 11.66 11.66 8.574
5.487 8.574 11.66 8.574 5.487
0 5.487 14.75 5.487 0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 123: Average burnable poison loading (grams) per node for the 11th core.
0
22.63
14.75
22.63
0
0
0
0
0
5.487
14.75
5.487
0
0
0
0
0
5.487
14.75
5.487
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
189
Fuel Assembly U235 Enrichment per Node for 11th Axial Core
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 3.00 3.00 3.00 2.50
3.00 2.50 2.50 2.50 3.00
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
3.00 2.50 2.50 2.50 3.00
2.50 3.00 3.00 3.00 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 3.00 3.00 3.00 2.50
3.00 2.50 2.50 2.50 3.00
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
3.00 2.50 2.50 2.50 3.00
2.50 3.00 3.00 3.00 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 3.00 3.00 3.00 2.50
3.00 2.50 2.50 2.50 3.00
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
3.00 2.50 2.50 2.50 3.00
2.50 3.00 3.00 3.00 2.50
2.50 2.50 2.50
Figure 124: Fuel assembly U235 enrichment per node for the 11th core.
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
190
Average Burnable Poison Loading (grams) per Node for 12th Axial Core
0
0
0
0
8.574
22.12
8.574
0
0
0
0
0
8.574
22.12
8.574
0
0
0
0
0
10.97
10.97
10.97
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 8.574 22.12 8.574 0
8.574 8.574 17.49 8.574 8.574
8.574 17.49 17.49 17.49 8.574
17.49 17.49 8.574 17.49 17.49
8.574 17.49 17.49 17.49 8.574
8.574 8.574 17.49 8.574 8.574
0 8.574 22.12 8.574 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 8.574 22.12 8.574 0
8.574 8.574 17.49 8.574 8.574
8.574 17.49 17.49 17.49 8.574
17.49 17.49 8.574 17.49 17.49
8.574 17.49 17.49 17.49 8.574
8.574 8.574 17.49 8.574 8.574
0 8.574 22.12 8.574 0
0
0
0
Node 7: 48-56 cm
0
0
0
0 10.97 10.97 10.97 0
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
0 10.97 10.97 10.97 0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
8.574
22.12
8.574
0
0
0
0
0
0
0
0
8.574
22.12
8.574
0
0
8.574
22.12
8.574
0
0
0
0
0
0
0
0
10.97
10.97
10.97
0
0
10.97
10.97
10.97
0
0
0
0
0
0
0
0
10.97
10.97
10.97
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 8.574 22.12 8.574 0
8.574 8.574 17.49 8.574 8.574
8.574 17.49 17.49 17.49 8.574
17.49 17.49 8.574 17.49 17.49
8.574 17.49 17.49 17.49 8.574
8.574 8.574 17.49 8.574 8.574
0 8.574 22.12 8.574 0
0
0
0
Node 5: 32-40 cm
0
0
0
0 10.97 10.97 10.97 0
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
0 10.97 10.97 10.97 0
0
0
0
Node 8: 56-64 cm
0
0
0
0 10.97 10.97 10.97 0
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
0 10.97 10.97 10.97 0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
8.574
22.12
8.574
0
0
0
0
0
0
0
0
8.574
22.12
8.574
0
0
10.97
10.97
10.97
0
0
0
0
0
0
0
0
10.97
10.97
10.97
0
0
10.97
10.97
10.97
0
0
0
0
0
0
0
0
10.97
10.97
10.97
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 8.574 22.12 8.574 0
8.574 8.574 17.49 8.574 8.574
8.574 17.49 17.49 17.49 8.574
17.49 17.49 8.574 17.49 17.49
8.574 17.49 17.49 17.49 8.574
8.574 8.574 17.49 8.574 8.574
0 8.574 22.12 8.574 0
0
0
0
Node 6: 40-48 cm
0
0
0
0 10.97 10.97 10.97 0
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
0 10.97 10.97 10.97 0
0
0
0
Node 9: 64-72 cm
0
0
0
0 10.97 10.97 10.97 0
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
10.97 10.97 10.97 10.97 10.97
0 10.97 10.97 10.97 0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 125: Average burnable poison loading (grams) per node for the 12th core.
0
8.574
22.12
8.574
0
0
0
0
0
10.97
10.97
10.97
0
0
0
0
0
10.97
10.97
10.97
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
191
Fuel Assembly U235 Enrichment per Node for 12th Axial Core
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
3.00 3.00 3.00
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
3.00
2.50
2.50
2.50
3.00
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 3.00 3.00 3.00 2.50
3.00 2.50 2.50 2.50 3.00
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
3.00 2.50 2.50 2.50 3.00
2.50 3.00 3.00 3.00 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 3.00 3.00 3.00 2.50
3.00 2.50 2.50 2.50 3.00
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
3.00 2.50 2.50 2.50 3.00
2.50 3.00 3.00 3.00 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 3.00 3.00 3.00 2.50
3.00 2.50 2.50 2.50 3.00
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
3.00 2.50 2.50 2.50 3.00
2.50 3.00 3.00 3.00 2.50
2.50 2.50 2.50
Figure 126: Fuel assembly U235 enrichment per node for the 12th core.
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
2.50
3.00
3.00
3.00
2.50
2.50
2.50
2.50
192
Average Burnable Poison Loading (grams) per Node for 13th Axial Core
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 19: 144-152 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
11.32
9.603
11.32
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 17: 128-136 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
0 9.603
9.603 0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
0
0
0
0
0
0
11.32
9.603
11.32
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 11.32 9.603 11.32 0
11.32 11.32 7.545 11.32 11.32
11.32 7.545 7.545 7.545 11.32
7.545 7.545 11.32 7.545 7.545
11.32 7.545 7.545 7.545 11.32
11.32 11.32 7.545 11.32 11.32
0 11.32 9.603 11.32 0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 18: 136-144 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 127: Average burnable poison loading (grams) per node for the 13th core.
0
11.32
9.603
11.32
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
193
Fuel Assembly U235 Enrichment per Node for 13th Axial Core
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.50 3.50
4.50 3.00 4.50
3.50 4.50 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.50 3.50 3.50
3.50 4.50 3.00 4.50 3.50
3.50 3.50 4.50 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Figure 128: Fuel assembly U235 enrichment per node for the 13th core.
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
194
Average Burnable Poison Loading (grams) per Node for 14th Axial Core
0
0
0
0
135.8
51.44
135.8
0
0
0
0
0
135.8
51.44
135.8
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 135.8 51.44 135.8 0
135.8 135.8 69.96 135.8 135.8
135.8 69.96 69.96 69.96 135.8
69.96 69.96 135.8 69.96 69.96
135.8 69.96 69.96 69.96 135.8
135.8 135.8 69.96 135.8 135.8
0 135.8 51.44 135.8 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 135.8 51.44 135.8 0
135.8 135.8 69.96 135.8 135.8
135.8 69.96 69.96 69.96 135.8
69.96 69.96 135.8 69.96 69.96
135.8 69.96 69.96 69.96 135.8
135.8 135.8 69.96 135.8 135.8
0 135.8 51.44 135.8 0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 19: 144-152 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
135.8
51.44
135.8
0
0
0
0
0
0
0
0
135.8
51.44
135.8
0
0
135.8
51.44
135.8
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 135.8 51.44 135.8 0
135.8 135.8 69.96 135.8 135.8
135.8 69.96 69.96 69.96 135.8
69.96 69.96 135.8 69.96 69.96
135.8 69.96 69.96 69.96 135.8
135.8 135.8 69.96 135.8 135.8
0 135.8 51.44 135.8 0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 17: 128-136 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
0 9.603
9.603 0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
135.8
51.44
135.8
0
0
0
0
0
0
0
0
135.8
51.44
135.8
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 135.8 51.44 135.8 0
135.8 135.8 69.96 135.8 135.8
135.8 69.96 69.96 69.96 135.8
69.96 69.96 135.8 69.96 69.96
135.8 69.96 69.96 69.96 135.8
135.8 135.8 69.96 135.8 135.8
0 135.8 51.44 135.8 0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 18: 136-144 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 129: Average burnable poison loading (grams) per node for the 14th core.
0
135.8
51.44
135.8
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
195
Fuel Assembly U235 Enrichment per Node for 14th Axial Core
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.50 3.50
4.50 3.00 4.50
3.50 4.50 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.50 3.50 3.50
3.50 4.50 3.00 4.50 3.50
3.50 3.50 4.50 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Figure 130: Fuel assembly U235 enrichment per node for the 14th core.
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
196
Average Burnable Poison Loading (grams) per Node for 15th Axial Core
0
0
0
0
32.92
32.92
32.92
0
0
0
0
0
32.92
32.92
32.92
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 32.92 32.92 32.92 0
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
0 32.92 32.92 32.92 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 32.92 32.92 32.92 0
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
0 32.92 32.92 32.92 0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 19: 144-152 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
32.92
32.92
32.92
0
0
0
0
0
0
0
0
32.92
32.92
32.92
0
0
32.92
32.92
32.92
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 32.92 32.92 32.92 0
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
0 32.92 32.92 32.92 0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 17: 128-136 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
0 9.603
9.603 0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
32.92
32.92
32.92
0
0
0
0
0
0
0
0
32.92
32.92
32.92
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 32.92 32.92 32.92 0
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
0 32.92 32.92 32.92 0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 18: 136-144 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 131: Average burnable poison loading (grams) per node for the 15th core.
0
32.92
32.92
32.92
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
197
Fuel Assembly U235 Enrichment per Node for 15th Axial Core
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.50 3.50
4.50 3.00 4.50
3.50 4.50 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.50 3.50 3.50
3.50 4.50 3.00 4.50 3.50
3.50 3.50 4.50 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Figure 132: Fuel assembly U235 enrichment per node for the 15th core.
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
198
Average Burnable Poison Loading (grams) per Node for 16th Axial Core
0
0
0
0
51.44
51.44
51.44
0
0
0
0
0
51.44
51.44
51.44
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 51.44 51.44 51.44 0
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
0 51.44 51.44 51.44 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 51.44 51.44 51.44 0
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
0 51.44 51.44 51.44 0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 19: 144-152 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
51.44
51.44
51.44
0
0
0
0
0
0
0
0
51.44
51.44
51.44
0
0
51.44
51.44
51.44
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 51.44 51.44 51.44 0
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
0 51.44 51.44 51.44 0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 17: 128-136 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
0 9.603
9.603 0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
51.44
51.44
51.44
0
0
0
0
0
0
0
0
51.44
51.44
51.44
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 51.44 51.44 51.44 0
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
0 51.44 51.44 51.44 0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 18: 136-144 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 133: Average burnable poison loading (grams) per node for the 16th core.
0
51.44
51.44
51.44
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
199
Fuel Assembly U235 Enrichment per Node for 16th Axial Core
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.50 3.50
4.50 3.00 4.50
3.50 4.50 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.50 3.50 3.50
3.50 4.50 3.00 4.50 3.50
3.50 3.50 4.50 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Figure 134: Fuel assembly U235 enrichment per node for the 16th core.
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
200
Average Burnable Poison Loading (grams) per Node for 17th Axial Core
0
0
0
0
135.8
51.44
135.8
0
0
0
0
0
135.8
51.44
135.8
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 135.8 51.44 135.8 0
135.8 135.8 69.96 135.8 135.8
135.8 69.96 69.96 69.96 135.8
69.96 69.96 135.8 69.96 69.96
135.8 69.96 69.96 69.96 135.8
135.8 135.8 69.96 135.8 135.8
0 135.8 51.44 135.8 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 135.8 51.44 135.8 0
135.8 135.8 69.96 135.8 135.8
135.8 69.96 69.96 69.96 135.8
69.96 69.96 135.8 69.96 69.96
135.8 69.96 69.96 69.96 135.8
135.8 135.8 69.96 135.8 135.8
0 135.8 51.44 135.8 0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 19: 144-152 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
135.8
51.44
135.8
0
0
0
0
0
0
0
0
135.8
51.44
135.8
0
0
135.8
51.44
135.8
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 135.8 51.44 135.8 0
135.8 135.8 69.96 135.8 135.8
135.8 69.96 69.96 69.96 135.8
69.96 69.96 135.8 69.96 69.96
135.8 69.96 69.96 69.96 135.8
135.8 135.8 69.96 135.8 135.8
0 135.8 51.44 135.8 0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 17: 128-136 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
0 9.603
9.603 0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
135.8
51.44
135.8
0
0
0
0
0
0
0
0
135.8
51.44
135.8
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 135.8 51.44 135.8 0
135.8 135.8 69.96 135.8 135.8
135.8 69.96 69.96 69.96 135.8
69.96 69.96 135.8 69.96 69.96
135.8 69.96 69.96 69.96 135.8
135.8 135.8 69.96 135.8 135.8
0 135.8 51.44 135.8 0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 18: 136-144 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 135: Average burnable poison loading (grams) per node for the 17th core.
0
135.8
51.44
135.8
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
201
Fuel Assembly U235 Enrichment per Node for 17th Axial Core
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.50 3.50
4.50 3.00 4.50
3.50 4.50 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.50 3.50 3.50
3.50 4.50 3.00 4.50 3.50
3.50 3.50 4.50 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Figure 136: Fuel assembly U235 enrichment per node for the 17th core.
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
202
Average Burnable Poison Loading (grams) per Node for 18th Axial Core
0
0
0
0
32.92
32.92
32.92
0
0
0
0
0
32.92
32.92
32.92
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 32.92 32.92 32.92 0
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
0 32.92 32.92 32.92 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 32.92 32.92 32.92 0
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
0 32.92 32.92 32.92 0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 19: 144-152 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
32.92
32.92
32.92
0
0
0
0
0
0
0
0
32.92
32.92
32.92
0
0
32.92
32.92
32.92
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 32.92 32.92 32.92 0
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
0 32.92 32.92 32.92 0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 17: 128-136 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
0 9.603
9.603 0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
32.92
32.92
32.92
0
0
0
0
0
0
0
0
32.92
32.92
32.92
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 32.92 32.92 32.92 0
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
32.92 32.92 32.92 32.92 32.92
0 32.92 32.92 32.92 0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 18: 136-144 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 137: Average burnable poison loading (grams) per node for the 18th core.
0
32.92
32.92
32.92
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
203
Fuel Assembly U235 Enrichment per Node for 18th Axial Core
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.50 3.50
4.50 3.00 4.50
3.50 4.50 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.50 3.50 3.50
3.50 4.50 3.00 4.50 3.50
3.50 3.50 4.50 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Figure 138: Fuel assembly U235 enrichment per node for the 18th core.
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
204
Average Burnable Poison Loading (grams) per Node for 19th Axial Core
0
0
0
0
51.44
51.44
51.44
0
0
0
0
0
51.44
51.44
51.44
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 51.44 51.44 51.44 0
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
0 51.44 51.44 51.44 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 51.44 51.44 51.44 0
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
0 51.44 51.44 51.44 0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 19: 144-152 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
51.44
51.44
51.44
0
0
0
0
0
0
0
0
51.44
51.44
51.44
0
0
51.44
51.44
51.44
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 51.44 51.44 51.44 0
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
0 51.44 51.44 51.44 0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 17: 128-136 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
0 9.603
9.603 0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
51.44
51.44
51.44
0
0
0
0
0
0
0
0
51.44
51.44
51.44
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 51.44 51.44 51.44 0
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
51.44 51.44 51.44 51.44 51.44
0 51.44 51.44 51.44 0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 18: 136-144 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 139: Average burnable poison loading (grams) per node for the 19th core.
0
51.44
51.44
51.44
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
205
Fuel Assembly U235 Enrichment per Node for 19th Axial Core
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.50 3.50
4.50 3.00 4.50
3.50 4.50 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.50 3.50 3.50
3.50 4.50 3.00 4.50 3.50
3.50 3.50 4.50 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Figure 140: Fuel assembly U235 enrichment per node for the 19th core.
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
206
Average Burnable Poison Loading (grams) per Node for 20th Axial Core
0
0
0
0
69.96
69.96
69.96
0
0
0
0
0
69.96
69.96
69.96
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 69.96 69.96 69.96 0
69.96 69.96 69.96 69.96 69.96
69.96 69.96 69.96 69.96 69.96
69.96 69.96 69.96 69.96 69.96
69.96 69.96 69.96 69.96 69.96
69.96 69.96 69.96 69.96 69.96
0 69.96 69.96 69.96 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 69.96 69.96 69.96 0
69.96 69.96 69.96 69.96 69.96
69.96 69.96 69.96 69.96 69.96
69.96 69.96 69.96 69.96 69.96
69.96 69.96 69.96 69.96 69.96
69.96 69.96 69.96 69.96 69.96
0 69.96 69.96 69.96 0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 19: 144-152 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
69.96
69.96
69.96
0
0
0
0
0
0
0
0
69.96
69.96
69.96
0
0
69.96
69.96
69.96
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 69.96 69.96 69.96 0
69.96 69.96 69.96 69.96 69.96
69.96 69.96 69.96 69.96 69.96
69.96 69.96 69.96 69.96 69.96
69.96 69.96 69.96 69.96 69.96
69.96 69.96 69.96 69.96 69.96
0 69.96 69.96 69.96 0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 17: 128-136 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
0 9.603
9.603 0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
69.96
69.96
69.96
0
0
0
0
0
0
0
0
69.96
69.96
69.96
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 69.96 69.96 69.96 0
69.96 69.96 69.96 69.96 69.96
69.96 69.96 69.96 69.96 69.96
69.96 69.96 69.96 69.96 69.96
69.96 69.96 69.96 69.96 69.96
69.96 69.96 69.96 69.96 69.96
0 69.96 69.96 69.96 0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 18: 136-144 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 141: Average burnable poison loading (grams) per node for the 20th core.
0
69.96
69.96
69.96
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
207
Fuel Assembly U235 Enrichment per Node for 20th Axial Core
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.50 3.50
4.50 3.00 4.50
3.50 4.50 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.50 3.50 3.50
3.50 4.50 3.00 4.50 3.50
3.50 3.50 4.50 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Figure 142: Fuel assembly U235 enrichment per node for the 20th core.
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
208
Average Burnable Poison Loading (grams) per Node for 21st Axial Core
0
0
0
0
88.48
88.48
88.48
0
0
0
0
0
88.48
88.48
88.48
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 88.48 88.48 88.48 0
88.48 88.48 88.48 88.48 88.48
88.48 88.48 88.48 88.48 88.48
88.48 88.48 88.48 88.48 88.48
88.48 88.48 88.48 88.48 88.48
88.48 88.48 88.48 88.48 88.48
0 88.48 88.48 88.48 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 88.48 88.48 88.48 0
88.48 88.48 88.48 88.48 88.48
88.48 88.48 88.48 88.48 88.48
88.48 88.48 88.48 88.48 88.48
88.48 88.48 88.48 88.48 88.48
88.48 88.48 88.48 88.48 88.48
0 88.48 88.48 88.48 0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 19: 144-152 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
88.48
88.48
88.48
0
0
0
0
0
0
0
0
88.48
88.48
88.48
0
0
88.48
88.48
88.48
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 88.48 88.48 88.48 0
88.48 88.48 88.48 88.48 88.48
88.48 88.48 88.48 88.48 88.48
88.48 88.48 88.48 88.48 88.48
88.48 88.48 88.48 88.48 88.48
88.48 88.48 88.48 88.48 88.48
0 88.48 88.48 88.48 0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 17: 128-136 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
0 9.603
9.603 0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
88.48
88.48
88.48
0
0
0
0
0
0
0
0
88.48
88.48
88.48
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 88.48 88.48 88.48 0
88.48 88.48 88.48 88.48 88.48
88.48 88.48 88.48 88.48 88.48
88.48 88.48 88.48 88.48 88.48
88.48 88.48 88.48 88.48 88.48
88.48 88.48 88.48 88.48 88.48
0 88.48 88.48 88.48 0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 18: 136-144 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 143: Average burnable poison loading (grams) per node for the 21st core.
0
88.48
88.48
88.48
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
209
Fuel Assembly U235 Enrichment per Node for 21st Axial Core
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.50 3.50
4.50 3.00 4.50
3.50 4.50 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.50 3.50 3.50
3.50 4.50 3.00 4.50 3.50
3.50 3.50 4.50 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Figure 144: Fuel assembly U235 enrichment per node for the 21st core.
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
210
Average Burnable Poison Loading (grams) per Node for 22nd Axial Core
0
0
0
0
135.8
135.8
135.8
0
0
0
0
0
135.8
135.8
135.8
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
0
0
0
0 135.8 135.8 135.8 0
135.8 135.8 135.8 135.8 135.8
135.8 135.8 135.8 135.8 135.8
135.8 135.8 135.8 135.8 135.8
135.8 135.8 135.8 135.8 135.8
135.8 135.8 135.8 135.8 135.8
0 135.8 135.8 135.8 0
0
0
0
Node 4: 24-32 cm
0
0
0
0 135.8 135.8 135.8 0
135.8 135.8 135.8 135.8 135.8
135.8 135.8 135.8 135.8 135.8
135.8 135.8 135.8 135.8 135.8
135.8 135.8 135.8 135.8 135.8
135.8 135.8 135.8 135.8 135.8
0 135.8 135.8 135.8 0
0
0
0
Node 7: 48-56 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 10: 72-80 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 19: 144-152 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
0
135.8
135.8
135.8
0
0
0
0
0
0
0
0
135.8
135.8
135.8
0
0
135.8
135.8
135.8
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
0
0
0
0 135.8 135.8 135.8 0
135.8 135.8 135.8 135.8 135.8
135.8 135.8 135.8 135.8 135.8
135.8 135.8 135.8 135.8 135.8
135.8 135.8 135.8 135.8 135.8
135.8 135.8 135.8 135.8 135.8
0 135.8 135.8 135.8 0
0
0
0
Node 5: 32-40 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 8: 56-64 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 11: 80-88 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 17: 128-136 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
0 9.603
9.603 0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
135.8
135.8
135.8
0
0
0
0
0
0
0
0
135.8
135.8
135.8
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
0
9.603
0
0
0
0
0
0
0
0
0
0
9.603
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
0
0
0
0 135.8 135.8 135.8 0
135.8 135.8 135.8 135.8 135.8
135.8 135.8 135.8 135.8 135.8
135.8 135.8 135.8 135.8 135.8
135.8 135.8 135.8 135.8 135.8
135.8 135.8 135.8 135.8 135.8
0 135.8 135.8 135.8 0
0
0
0
Node 6: 40-48 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 9: 64-72 cm
0
0
0
0
0 9.603 0
0
0 4.801 7.545 4.801 0
4.801 7.545 7.545 7.545 4.801
7.545 7.545 11.32 7.545 7.545
4.801 7.545 7.545 7.545 4.801
0 4.801 7.545 4.801 0
0
0 9.603 0
0
0
0
0
Node 12: 88-96 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 18: 136-144 cm
0
0
0
0 4.801 9.603 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 9.603 4.801 0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
9.603 0
0
0 9.603
0 9.603 11.32 9.603 0
0 11.32 0 11.32 0
0 9.603 11.32 9.603 0
9.603 0
0
0 9.603
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
135.8
135.8
135.8
0
0
0
0
0
0
9.603
0
0
0
0
0
0
0
9.603
0
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
4.801
9.603
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 145: Average burnable poison loading (grams) per node for the 22nd core.
211
Fuel Assembly U235 Enrichment per Node for 22nd Axial Core
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
Node 1: 0-8 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 4: 24-32 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 7: 48-56 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
2.50 2.50 2.50
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
2.50 2.50 2.50
Node 5: 32-40 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 8: 56-64 cm
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 3.00 2.50
2.50 2.50 2.50
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.00 3.50
4.00 3.00 4.00
3.50 4.00 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
4.50 4.00 4.50
3.50 3.50 3.50
3.50 4.50 3.50
4.50 3.00 4.50
3.50 4.50 3.50
3.50 3.50 3.50
4.50 4.00 4.50
2.50 2.50 2.50
2.50
4.95
4.95
4.95
4.95
4.95
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
4.50
3.50
3.50
3.50
4.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
Node 3: 16-24 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 6: 40-48 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 3.00 2.50 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.00 3.50 3.50
3.50 4.00 3.00 4.00 3.50
3.50 3.50 4.00 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 4.50 4.00 4.50 2.50
4.50 3.50 3.50 3.50 4.50
3.50 3.50 4.50 3.50 3.50
3.50 4.50 3.00 4.50 3.50
3.50 3.50 4.50 3.50 3.50
4.50 3.50 3.50 3.50 4.50
2.50 4.50 4.00 4.50 2.50
2.50 2.50 2.50
Figure 146: Fuel assembly U235 enrichment per node for the 22nd core.
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.00
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
2.50
4.50
4.00
4.50
2.50
2.50
2.50
2.50
212
Average Burnable Poison Loading (grams) per Node for 23rd Axial Core
5.487
5.487 5.487
5.487 5.487
5.487 5.487
5.487
5.487
5.487 5.487
5.487 5.487
5.487 5.487
5.487
5.487
5.487 5.487
5.487 5.487
5.487 5.487
5.487
0
0
0
0
4.801
4.801
4.801
0
0
0
0
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 4: 24-32 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 7: 48-56 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 10: 72-80 cm
0
0
0
0 4.801 4.801 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 4.801 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 4.801 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 4.801 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5.487
5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487
5.487
5.487
5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487
5.487
5.487
5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487
5.487
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
4.801
4.801
4.801
0
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 5: 32-40 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 8: 56-64 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 11: 80-88 cm
0
0
0
0 4.801 4.801 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 4.801 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5.487
5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487
5.487
5.487
5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487
5.487
5.487
5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487
5.487
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 6: 40-48 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 9: 64-72 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 12: 88-96 cm
0
0
0
0 4.801 4.801 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 4.801 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 147: Average burnable poison loading (grams) per node for the 23rd core.
5.487
5.487 5.487
5.487 5.487
5.487 5.487
5.487
5.487
5.487 5.487
5.487 5.487
5.487 5.487
5.487
5.487
5.487 5.487
5.487 5.487
5.487 5.487
5.487
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
213
Fuel Assembly U235 Enrichment per Node for 23rd Axial Core
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 1: 0-8 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 4: 24-32 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 7: 48-56 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 5: 32-40 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 8: 56-64 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 3: 16-24 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 6: 40-48 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 9: 64-72 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Figure 148: Fuel assembly U235 enrichment per node for the 23rd core.
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
214
Average Burnable Poison Loading (grams) per Node for 24th Axial Core
5.487
5.487 5.487
5.487 5.487
5.487 5.487
5.487
5.487
5.487 5.487
5.487 5.487
5.487 5.487
5.487
5.487
5.487 5.487
5.487 5.487
5.487 5.487
5.487
0
0
0
0
4.801
4.801
4.801
0
0
0
0
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 5.487 5.487 5.487 4.801
4.801 5.487 4.801 5.487 4.801
4.801 5.487 5.487 5.487 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 4: 24-32 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 7: 48-56 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 10: 72-80 cm
0
0
0
0 4.801 4.801 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 4.801 4.801 0
0
0
0
Node 13: 96-104 cm
0
0
0
0 4.801 4.801 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 4.801 4.801 0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5.487
5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487
5.487
5.487
5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487
5.487
5.487
5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487
5.487
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
4.801
4.801
4.801
0
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 5.487 5.487 5.487 4.801
4.801 5.487 4.801 5.487 4.801
4.801 5.487 5.487 5.487 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 5: 32-40 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 8: 56-64 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 11: 80-88 cm
0
0
0
0 4.801 4.801 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 4.801 4.801 0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5.487
5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487
5.487
5.487
5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487
5.487
5.487
5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487 5.487 5.487 5.487
5.487
5.487
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 5.487 5.487 5.487 4.801
4.801 5.487 4.801 5.487 4.801
4.801 5.487 5.487 5.487 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 6: 40-48 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 9: 64-72 cm
5.487 5.487 5.487
5.487 5.487 5.487 5.487 5.487
5.487 4.801 4.801 4.801 5.487
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
4.801 4.801 4.801 4.801 4.801
5.487 4.801 4.801 4.801 5.487
5.487 5.487 5.487 5.487 5.487
5.487 5.487 5.487
Node 12: 88-96 cm
0
0
0
0 4.801 4.801 4.801 0
9.603 7.545 7.545 7.545 9.603
7.545 7.545 9.603 7.545 7.545
7.545 9.603 9.603 9.603 7.545
7.545 7.545 9.603 7.545 7.545
9.603 7.545 7.545 7.545 9.603
0 4.801 4.801 4.801 0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 149: Average burnable poison loading (grams) per node for the 24th core.
5.487
5.487 5.487
5.487 5.487
5.487 5.487
5.487
5.487
5.487 5.487
5.487 5.487
5.487 5.487
5.487
5.487
5.487 5.487
5.487 5.487
5.487 5.487
5.487
0
4.801
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
215
Fuel Assembly U235 Enrichment per Node for 24th Axial Core
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 1: 0-8 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 4: 24-32 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 7: 48-56 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 5: 32-40 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 8: 56-64 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 3: 16-24 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 6: 40-48 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 9: 64-72 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Figure 150: Fuel assembly U235 enrichment per node for the 24th core.
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
216
Average Burnable Poison Loading (grams) per Node for 25th Axial Core
4.801
4.801 5.487
4.801 5.487
4.801 5.487
4.801
4.801
4.801 5.487
4.801 5.487
4.801 5.487
4.801
4.801
4.801 5.487
4.801 5.487
4.801 5.487
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 4.801 4.801 4.801 10.97
10.97 4.801 10.97 4.801 10.97
10.97 4.801 4.801 4.801 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 4: 24-32 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 4.801 4.801 4.801 10.97
10.97 4.801 10.97 4.801 10.97
10.97 4.801 4.801 4.801 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 7: 48-56 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 4.801 4.801 4.801 10.97
10.97 4.801 10.97 4.801 10.97
10.97 4.801 4.801 4.801 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 10: 72-80 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 13: 96-104 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4.801
4.801
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
4.801
4.801
4.801
4.801
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
4.801
4.801
4.801
4.801
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 4.801 4.801 4.801 10.97
10.97 4.801 10.97 4.801 10.97
10.97 4.801 4.801 4.801 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 5: 32-40 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 4.801 4.801 4.801 10.97
10.97 4.801 10.97 4.801 10.97
10.97 4.801 4.801 4.801 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 8: 56-64 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 4.801 4.801 4.801 10.97
10.97 4.801 10.97 4.801 10.97
10.97 4.801 4.801 4.801 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 11: 80-88 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4.801
4.801
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
4.801
4.801
4.801
4.801
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
4.801
4.801
4.801
4.801
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 4.801 4.801 4.801 10.97
10.97 4.801 10.97 4.801 10.97
10.97 4.801 4.801 4.801 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 6: 40-48 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 4.801 4.801 4.801 10.97
10.97 4.801 10.97 4.801 10.97
10.97 4.801 4.801 4.801 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 9: 64-72 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 4.801 4.801 4.801 10.97
10.97 4.801 10.97 4.801 10.97
10.97 4.801 4.801 4.801 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 12: 88-96 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 151: Average burnable poison loading (grams) per node for the 25th core.
4.801
5.487 4.801
5.487 4.801
5.487 4.801
4.801
4.801
5.487 4.801
5.487 4.801
5.487 4.801
4.801
4.801
5.487 4.801
5.487 4.801
5.487 4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
217
Fuel Assembly U235 Enrichment per Node for 25th Axial Core
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 1: 0-8 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 4: 24-32 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 7: 48-56 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 5: 32-40 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 8: 56-64 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 3: 16-24 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 6: 40-48 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 9: 64-72 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Figure 152: Fuel assembly U235 enrichment per node for the 25th core.
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
218
Average Burnable Poison Loading (grams) per Node for 26th Axial Core
4.801
4.801 5.487
4.801 5.487
4.801 5.487
4.801
4.801
4.801 5.487
4.801 5.487
4.801 5.487
4.801
4.801
4.801 5.487
4.801 5.487
4.801 5.487
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 13.38 13.38 13.38 10.97
10.97 13.38 10.97 13.38 10.97
10.97 13.38 13.38 13.38 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 4: 24-32 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 13.38 13.38 13.38 10.97
10.97 13.38 10.97 13.38 10.97
10.97 13.38 13.38 13.38 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 7: 48-56 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 13.38 13.38 13.38 10.97
10.97 13.38 10.97 13.38 10.97
10.97 13.38 13.38 13.38 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 10: 72-80 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 13: 96-104 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4.801
4.801
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
4.801
4.801
4.801
4.801
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
4.801
4.801
4.801
4.801
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 13.38 13.38 13.38 10.97
10.97 13.38 10.97 13.38 10.97
10.97 13.38 13.38 13.38 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 5: 32-40 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 13.38 13.38 13.38 10.97
10.97 13.38 10.97 13.38 10.97
10.97 13.38 13.38 13.38 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 8: 56-64 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 13.38 13.38 13.38 10.97
10.97 13.38 10.97 13.38 10.97
10.97 13.38 13.38 13.38 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 11: 80-88 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4.801
4.801
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
4.801
4.801
4.801
4.801
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
4.801
4.801
4.801
4.801
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 13.38 13.38 13.38 10.97
10.97 13.38 10.97 13.38 10.97
10.97 13.38 13.38 13.38 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 6: 40-48 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 13.38 13.38 13.38 10.97
10.97 13.38 10.97 13.38 10.97
10.97 13.38 13.38 13.38 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 9: 64-72 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 13.38 13.38 13.38 10.97
10.97 13.38 10.97 13.38 10.97
10.97 13.38 13.38 13.38 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 12: 88-96 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 153: Average burnable poison loading (grams) per node for the 26th core.
4.801
5.487 4.801
5.487 4.801
5.487 4.801
4.801
4.801
5.487 4.801
5.487 4.801
5.487 4.801
4.801
4.801
5.487 4.801
5.487 4.801
5.487 4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
219
Fuel Assembly U235 Enrichment per Node for 26th Axial Core
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 1: 0-8 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 4: 24-32 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 7: 48-56 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 5: 32-40 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 8: 56-64 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 3: 16-24 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 6: 40-48 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 9: 64-72 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Figure 154: Fuel assembly U235 enrichment per node for the 26th core.
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
220
Average Burnable Poison Loading (grams) per Node for 27th Axial Core
4.801
4.801 5.487
4.801 5.487
4.801 5.487
4.801
4.801
4.801 5.487
4.801 5.487
4.801 5.487
4.801
4.801
4.801 5.487
4.801 5.487
4.801 5.487
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 16.46 16.46 16.46 10.97
10.97 16.46 10.97 16.46 10.97
10.97 16.46 16.46 16.46 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 4: 24-32 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 16.46 16.46 16.46 10.97
10.97 16.46 10.97 16.46 10.97
10.97 16.46 16.46 16.46 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 7: 48-56 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 16.46 16.46 16.46 10.97
10.97 16.46 10.97 16.46 10.97
10.97 16.46 16.46 16.46 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 10: 72-80 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 13: 96-104 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4.801
4.801
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
4.801
4.801
4.801
4.801
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
4.801
4.801
4.801
4.801
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 16.46 16.46 16.46 10.97
10.97 16.46 10.97 16.46 10.97
10.97 16.46 16.46 16.46 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 5: 32-40 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 16.46 16.46 16.46 10.97
10.97 16.46 10.97 16.46 10.97
10.97 16.46 16.46 16.46 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 8: 56-64 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 16.46 16.46 16.46 10.97
10.97 16.46 10.97 16.46 10.97
10.97 16.46 16.46 16.46 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 11: 80-88 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4.801
4.801
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
4.801
4.801
4.801
4.801
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
4.801
4.801
4.801
4.801
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
5.487 4.801 4.801 5.487
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 16.46 16.46 16.46 10.97
10.97 16.46 10.97 16.46 10.97
10.97 16.46 16.46 16.46 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 6: 40-48 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 16.46 16.46 16.46 10.97
10.97 16.46 10.97 16.46 10.97
10.97 16.46 16.46 16.46 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 9: 64-72 cm
4.801 4.801 4.801
4.801 5.487 5.487 5.487 4.801
5.487 10.97 10.97 10.97 5.487
10.97 16.46 16.46 16.46 10.97
10.97 16.46 10.97 16.46 10.97
10.97 16.46 16.46 16.46 10.97
5.487 10.97 10.97 10.97 5.487
4.801 5.487 5.487 5.487 4.801
4.801 4.801 4.801
Node 12: 88-96 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 155: Average burnable poison loading (grams) per node for the 27th core.
4.801
5.487 4.801
5.487 4.801
5.487 4.801
4.801
4.801
5.487 4.801
5.487 4.801
5.487 4.801
4.801
4.801
5.487 4.801
5.487 4.801
5.487 4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
221
Fuel Assembly U235 Enrichment per Node for 27th Axial Core
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 1: 0-8 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 4: 24-32 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 7: 48-56 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 5: 32-40 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 8: 56-64 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 3: 16-24 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 6: 40-48 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 9: 64-72 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Figure 156: Fuel assembly U235 enrichment per node for the 27th core.
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
222
Average Burnable Poison Loading (grams) per Node for 28th Axial Core
4.801
4.801 13.38
4.801 13.38
4.801 13.38
4.801
4.801
4.801 13.38
4.801 13.38
4.801 13.38
4.801
4.801
4.801 13.38
4.801 13.38
4.801 13.38
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
4.801 4.801 4.801
4.801 13.38 13.38 13.38 4.801
13.38 10.97 10.97 10.97 13.38
10.97 16.46 16.46 16.46 10.97
10.97 16.46 10.97 16.46 10.97
10.97 16.46 16.46 16.46 10.97
13.38 10.97 10.97 10.97 13.38
4.801 13.38 13.38 13.38 4.801
4.801 4.801 4.801
Node 4: 24-32 cm
4.801 4.801 4.801
4.801 13.38 13.38 13.38 4.801
13.38 10.97 10.97 10.97 13.38
10.97 16.46 16.46 16.46 10.97
10.97 16.46 10.97 16.46 10.97
10.97 16.46 16.46 16.46 10.97
13.38 10.97 10.97 10.97 13.38
4.801 13.38 13.38 13.38 4.801
4.801 4.801 4.801
Node 7: 48-56 cm
4.801 4.801 4.801
4.801 13.38 13.38 13.38 4.801
13.38 10.97 10.97 10.97 13.38
10.97 16.46 16.46 16.46 10.97
10.97 16.46 10.97 16.46 10.97
10.97 16.46 16.46 16.46 10.97
13.38 10.97 10.97 10.97 13.38
4.801 13.38 13.38 13.38 4.801
4.801 4.801 4.801
Node 10: 72-80 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 13: 96-104 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4.801
4.801
13.38 4.801 4.801 13.38
13.38 4.801 4.801 13.38
13.38 4.801 4.801 13.38
4.801
4.801
4.801
4.801
13.38 4.801 4.801 13.38
13.38 4.801 4.801 13.38
13.38 4.801 4.801 13.38
4.801
4.801
4.801
4.801
13.38 4.801 4.801 13.38
13.38 4.801 4.801 13.38
13.38 4.801 4.801 13.38
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
4.801 4.801 4.801
4.801 13.38 13.38 13.38 4.801
13.38 10.97 10.97 10.97 13.38
10.97 16.46 16.46 16.46 10.97
10.97 16.46 10.97 16.46 10.97
10.97 16.46 16.46 16.46 10.97
13.38 10.97 10.97 10.97 13.38
4.801 13.38 13.38 13.38 4.801
4.801 4.801 4.801
Node 5: 32-40 cm
4.801 4.801 4.801
4.801 13.38 13.38 13.38 4.801
13.38 10.97 10.97 10.97 13.38
10.97 16.46 16.46 16.46 10.97
10.97 16.46 10.97 16.46 10.97
10.97 16.46 16.46 16.46 10.97
13.38 10.97 10.97 10.97 13.38
4.801 13.38 13.38 13.38 4.801
4.801 4.801 4.801
Node 8: 56-64 cm
4.801 4.801 4.801
4.801 13.38 13.38 13.38 4.801
13.38 10.97 10.97 10.97 13.38
10.97 16.46 16.46 16.46 10.97
10.97 16.46 10.97 16.46 10.97
10.97 16.46 16.46 16.46 10.97
13.38 10.97 10.97 10.97 13.38
4.801 13.38 13.38 13.38 4.801
4.801 4.801 4.801
Node 11: 80-88 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4.801
4.801
13.38 4.801 4.801 13.38
13.38 4.801 4.801 13.38
13.38 4.801 4.801 13.38
4.801
4.801
4.801
4.801
13.38 4.801 4.801 13.38
13.38 4.801 4.801 13.38
13.38 4.801 4.801 13.38
4.801
4.801
4.801
4.801
13.38 4.801 4.801 13.38
13.38 4.801 4.801 13.38
13.38 4.801 4.801 13.38
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
4.801 4.801 4.801
4.801 13.38 13.38 13.38 4.801
13.38 10.97 10.97 10.97 13.38
10.97 16.46 16.46 16.46 10.97
10.97 16.46 10.97 16.46 10.97
10.97 16.46 16.46 16.46 10.97
13.38 10.97 10.97 10.97 13.38
4.801 13.38 13.38 13.38 4.801
4.801 4.801 4.801
Node 6: 40-48 cm
4.801 4.801 4.801
4.801 13.38 13.38 13.38 4.801
13.38 10.97 10.97 10.97 13.38
10.97 16.46 16.46 16.46 10.97
10.97 16.46 10.97 16.46 10.97
10.97 16.46 16.46 16.46 10.97
13.38 10.97 10.97 10.97 13.38
4.801 13.38 13.38 13.38 4.801
4.801 4.801 4.801
Node 9: 64-72 cm
4.801 4.801 4.801
4.801 13.38 13.38 13.38 4.801
13.38 10.97 10.97 10.97 13.38
10.97 16.46 16.46 16.46 10.97
10.97 16.46 10.97 16.46 10.97
10.97 16.46 16.46 16.46 10.97
13.38 10.97 10.97 10.97 13.38
4.801 13.38 13.38 13.38 4.801
4.801 4.801 4.801
Node 12: 88-96 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 157: Average burnable poison loading (grams) per node for the 28th core.
4.801
13.38 4.801
13.38 4.801
13.38 4.801
4.801
4.801
13.38 4.801
13.38 4.801
13.38 4.801
4.801
4.801
13.38 4.801
13.38 4.801
13.38 4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
223
Fuel Assembly U235 Enrichment per Node for 28th Axial Core
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 1: 0-8 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 4: 24-32 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 7: 48-56 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 5: 32-40 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 8: 56-64 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 3: 16-24 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 6: 40-48 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 9: 64-72 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Figure 158: Fuel assembly U235 enrichment per node for the 28th core.
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
224
Average Burnable Poison Loading (grams) per Node for 29th Axial Core
4.801
4.801 14.4
4.801 14.4
4.801 14.4
4.801
4.801
4.801 14.4
4.801 14.4
4.801 14.4
4.801
4.801
4.801 14.4
4.801 14.4
4.801 14.4
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
4.801 4.801 4.801
4.801 14.4 14.4 14.4 4.801
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
4.801 14.4 14.4 14.4 4.801
4.801 4.801 4.801
Node 4: 24-32 cm
4.801 4.801 4.801
4.801 14.4 14.4 14.4 4.801
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
4.801 14.4 14.4 14.4 4.801
4.801 4.801 4.801
Node 7: 48-56 cm
4.801 4.801 4.801
4.801 14.4 14.4 14.4 4.801
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
4.801 14.4 14.4 14.4 4.801
4.801 4.801 4.801
Node 10: 72-80 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 13: 96-104 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4.801
4.801
14.4 4.801 4.801 14.4
14.4 4.801 4.801 14.4
14.4 4.801 4.801 14.4
4.801
4.801
4.801
4.801
14.4 4.801 4.801 14.4
14.4 4.801 4.801 14.4
14.4 4.801 4.801 14.4
4.801
4.801
4.801
4.801
14.4 4.801 4.801 14.4
14.4 4.801 4.801 14.4
14.4 4.801 4.801 14.4
4.801
4.801
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
4.801 4.801 4.801
4.801 14.4 14.4 14.4 4.801
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
4.801 14.4 14.4 14.4 4.801
4.801 4.801 4.801
Node 5: 32-40 cm
4.801 4.801 4.801
4.801 14.4 14.4 14.4 4.801
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
4.801 14.4 14.4 14.4 4.801
4.801 4.801 4.801
Node 8: 56-64 cm
4.801 4.801 4.801
4.801 14.4 14.4 14.4 4.801
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
4.801 14.4 14.4 14.4 4.801
4.801 4.801 4.801
Node 11: 80-88 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4.801
4.801
14.4 4.801 4.801 14.4
14.4 4.801 4.801 14.4
14.4 4.801 4.801 14.4
4.801
4.801
4.801
4.801
14.4 4.801 4.801 14.4
14.4 4.801 4.801 14.4
14.4 4.801 4.801 14.4
4.801
4.801
4.801
14.4 4.801
14.4 4.801
14.4 4.801
4.801
0
0
0
0
14.4
14.4
14.4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
4.801 4.801 4.801
4.801 14.4 14.4 14.4 4.801
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
4.801 14.4 14.4 14.4 4.801
4.801 4.801 4.801
Node 6: 40-48 cm
4.801 4.801 4.801
4.801 14.4 14.4 14.4 4.801
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
4.801 14.4 14.4 14.4 4.801
4.801 4.801 4.801
Node 9: 64-72 cm
0
0
0
0
14.4 14.4 14.4
0
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
0
14.4 14.4 14.4
0
0
0
0
Node 12: 88-96 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 159: Average burnable poison loading (grams) per node for the 29th core.
4.801
14.4 4.801
14.4 4.801
14.4 4.801
4.801
4.801
14.4 4.801
14.4 4.801
14.4 4.801
4.801
0
14.4
14.4
14.4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
225
Fuel Assembly U235 Enrichment per Node for 29th Axial Core
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 1: 0-8 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 4: 24-32 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 7: 48-56 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
Node 2: 8-16 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 5: 32-40 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 8: 56-64 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 3: 16-24 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 6: 40-48 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 9: 64-72 cm
2.50 2.50 2.50
2.50 4.95 4.95 4.95 2.50
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
2.50 4.95 4.95 4.95 2.50
2.50 2.50 2.50
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Figure 160: Fuel assembly U235 enrichment per node for the 29th core.
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
226
Average Burnable Poison Loading (grams) per Node for 30th Axial Core
16.46
16.46 14.4
16.46 14.4
16.46 14.4
16.46
16.46
16.46 14.4
16.46 14.4
16.46 14.4
16.46
16.46
16.46 14.4
16.46 14.4
16.46 14.4
16.46
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 4: 24-32 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 7: 48-56 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 10: 72-80 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 13: 96-104 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16.46
16.46
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
16.46
16.46
16.46
16.46
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
16.46
16.46
16.46
16.46
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
16.46
16.46
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 5: 32-40 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 8: 56-64 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 11: 80-88 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16.46
16.46
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
16.46
16.46
16.46
16.46
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
16.46
16.46
16.46
16.46
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
16.46
16.46
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 6: 40-48 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 9: 64-72 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 16.46 16.46 16.46 14.4
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
16.46 16.46 16.46 16.46 16.46
14.4 16.46 16.46 16.46 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 12: 88-96 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 161: Average burnable poison loading (grams) per node for the 30th core.
16.46
14.4 16.46
14.4 16.46
14.4 16.46
16.46
16.46
14.4 16.46
14.4 16.46
14.4 16.46
16.46
16.46
14.4 16.46
14.4 16.46
14.4 16.46
16.46
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
227
Fuel Assembly U235 Enrichment per Node for 30th Axial Core
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 1: 0-8 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 4: 24-32 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 7: 48-56 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 5: 32-40 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 8: 56-64 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 3: 16-24 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 6: 40-48 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 9: 64-72 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Figure 162: Fuel assembly U235 enrichment per node for the 30th core.
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
228
Average Burnable Poison Loading (grams) per Node for 31th Axial Core
16.46
16.46 14.4
16.46 14.4
16.46 14.4
16.46
16.46
16.46 14.4
16.46 14.4
16.46 14.4
16.46
16.46
16.46 14.4
16.46 14.4
16.46 14.4
16.46
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 17.49 17.49 17.49 14.4
17.49 16.46 16.46 16.46 17.49
17.49 16.46 17.49 16.46 17.49
17.49 16.46 16.46 16.46 17.49
14.4 17.49 17.49 17.49 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 4: 24-32 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 17.49 17.49 17.49 14.4
17.49 16.46 16.46 16.46 17.49
17.49 16.46 17.49 16.46 17.49
17.49 16.46 16.46 16.46 17.49
14.4 17.49 17.49 17.49 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 7: 48-56 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 17.49 17.49 17.49 14.4
17.49 16.46 16.46 16.46 17.49
17.49 16.46 17.49 16.46 17.49
17.49 16.46 16.46 16.46 17.49
14.4 17.49 17.49 17.49 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 10: 72-80 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 13: 96-104 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16.46
16.46
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
16.46
16.46
16.46
16.46
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
16.46
16.46
16.46
16.46
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
16.46
16.46
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 17.49 17.49 17.49 14.4
17.49 16.46 16.46 16.46 17.49
17.49 16.46 17.49 16.46 17.49
17.49 16.46 16.46 16.46 17.49
14.4 17.49 17.49 17.49 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 5: 32-40 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 17.49 17.49 17.49 14.4
17.49 16.46 16.46 16.46 17.49
17.49 16.46 17.49 16.46 17.49
17.49 16.46 16.46 16.46 17.49
14.4 17.49 17.49 17.49 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 8: 56-64 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 17.49 17.49 17.49 14.4
17.49 16.46 16.46 16.46 17.49
17.49 16.46 17.49 16.46 17.49
17.49 16.46 16.46 16.46 17.49
14.4 17.49 17.49 17.49 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 11: 80-88 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16.46
16.46
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
16.46
16.46
16.46
16.46
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
16.46
16.46
16.46
16.46
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
14.4 16.46 16.46 14.4
16.46
16.46
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 17.49 17.49 17.49 14.4
17.49 16.46 16.46 16.46 17.49
17.49 16.46 17.49 16.46 17.49
17.49 16.46 16.46 16.46 17.49
14.4 17.49 17.49 17.49 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 6: 40-48 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 17.49 17.49 17.49 14.4
17.49 16.46 16.46 16.46 17.49
17.49 16.46 17.49 16.46 17.49
17.49 16.46 16.46 16.46 17.49
14.4 17.49 17.49 17.49 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 9: 64-72 cm
16.46 16.46 16.46
16.46 14.4 14.4 14.4 16.46
14.4 17.49 17.49 17.49 14.4
17.49 16.46 16.46 16.46 17.49
17.49 16.46 17.49 16.46 17.49
17.49 16.46 16.46 16.46 17.49
14.4 17.49 17.49 17.49 14.4
16.46 14.4 14.4 14.4 16.46
16.46 16.46 16.46
Node 12: 88-96 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 163: Average burnable poison loading (grams) per node for the 31st core.
16.46
14.4 16.46
14.4 16.46
14.4 16.46
16.46
16.46
14.4 16.46
14.4 16.46
14.4 16.46
16.46
16.46
14.4 16.46
14.4 16.46
14.4 16.46
16.46
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
229
Fuel Assembly U235 Enrichment per Node for 31th Axial Core
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 1: 0-8 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 4: 24-32 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 7: 48-56 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 5: 32-40 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 8: 56-64 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 3: 16-24 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 6: 40-48 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 9: 64-72 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Figure 164: Fuel assembly U235 enrichment per node for the 31st core.
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
230
Average Burnable Poison Loading (grams) per Node for 32nd Axial Core
17.49
17.49 14.4
17.49 14.4
17.49 14.4
17.49
17.49
17.49 14.4
17.49 14.4
17.49 14.4
17.49
17.49
17.49 14.4
17.49 14.4
17.49 14.4
17.49
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
17.49 17.49 17.49
17.49 14.4 14.4 14.4 17.49
14.4 17.49 17.49 17.49 14.4
17.49 16.46 16.46 16.46 17.49
17.49 16.46 17.49 16.46 17.49
17.49 16.46 16.46 16.46 17.49
14.4 17.49 17.49 17.49 14.4
17.49 14.4 14.4 14.4 17.49
17.49 17.49 17.49
Node 4: 24-32 cm
17.49 17.49 17.49
17.49 14.4 14.4 14.4 17.49
14.4 17.49 17.49 17.49 14.4
17.49 16.46 16.46 16.46 17.49
17.49 16.46 17.49 16.46 17.49
17.49 16.46 16.46 16.46 17.49
14.4 17.49 17.49 17.49 14.4
17.49 14.4 14.4 14.4 17.49
17.49 17.49 17.49
Node 7: 48-56 cm
17.49 17.49 17.49
17.49 14.4 14.4 14.4 17.49
14.4 17.49 17.49 17.49 14.4
17.49 16.46 16.46 16.46 17.49
17.49 16.46 17.49 16.46 17.49
17.49 16.46 16.46 16.46 17.49
14.4 17.49 17.49 17.49 14.4
17.49 14.4 14.4 14.4 17.49
17.49 17.49 17.49
Node 10: 72-80 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 13: 96-104 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
17.49
17.49
14.4 17.49 17.49 14.4
14.4 17.49 17.49 14.4
14.4 17.49 17.49 14.4
17.49
17.49
17.49
17.49
14.4 17.49 17.49 14.4
14.4 17.49 17.49 14.4
14.4 17.49 17.49 14.4
17.49
17.49
17.49
17.49
14.4 17.49 17.49 14.4
14.4 17.49 17.49 14.4
14.4 17.49 17.49 14.4
17.49
17.49
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
17.49 17.49 17.49
17.49 14.4 14.4 14.4 17.49
14.4 17.49 17.49 17.49 14.4
17.49 16.46 16.46 16.46 17.49
17.49 16.46 17.49 16.46 17.49
17.49 16.46 16.46 16.46 17.49
14.4 17.49 17.49 17.49 14.4
17.49 14.4 14.4 14.4 17.49
17.49 17.49 17.49
Node 5: 32-40 cm
17.49 17.49 17.49
17.49 14.4 14.4 14.4 17.49
14.4 17.49 17.49 17.49 14.4
17.49 16.46 16.46 16.46 17.49
17.49 16.46 17.49 16.46 17.49
17.49 16.46 16.46 16.46 17.49
14.4 17.49 17.49 17.49 14.4
17.49 14.4 14.4 14.4 17.49
17.49 17.49 17.49
Node 8: 56-64 cm
17.49 17.49 17.49
17.49 14.4 14.4 14.4 17.49
14.4 17.49 17.49 17.49 14.4
17.49 16.46 16.46 16.46 17.49
17.49 16.46 17.49 16.46 17.49
17.49 16.46 16.46 16.46 17.49
14.4 17.49 17.49 17.49 14.4
17.49 14.4 14.4 14.4 17.49
17.49 17.49 17.49
Node 11: 80-88 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
17.49
17.49
14.4 17.49 17.49 14.4
14.4 17.49 17.49 14.4
14.4 17.49 17.49 14.4
17.49
17.49
17.49
17.49
14.4 17.49 17.49 14.4
14.4 17.49 17.49 14.4
14.4 17.49 17.49 14.4
17.49
17.49
17.49
17.49
14.4 17.49 17.49 14.4
14.4 17.49 17.49 14.4
14.4 17.49 17.49 14.4
17.49
17.49
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
17.49 17.49 17.49
17.49 14.4 14.4 14.4 17.49
14.4 17.49 17.49 17.49 14.4
17.49 16.46 16.46 16.46 17.49
17.49 16.46 17.49 16.46 17.49
17.49 16.46 16.46 16.46 17.49
14.4 17.49 17.49 17.49 14.4
17.49 14.4 14.4 14.4 17.49
17.49 17.49 17.49
Node 6: 40-48 cm
17.49 17.49 17.49
17.49 14.4 14.4 14.4 17.49
14.4 17.49 17.49 17.49 14.4
17.49 16.46 16.46 16.46 17.49
17.49 16.46 17.49 16.46 17.49
17.49 16.46 16.46 16.46 17.49
14.4 17.49 17.49 17.49 14.4
17.49 14.4 14.4 14.4 17.49
17.49 17.49 17.49
Node 9: 64-72 cm
17.49 17.49 17.49
17.49 14.4 14.4 14.4 17.49
14.4 17.49 17.49 17.49 14.4
17.49 16.46 16.46 16.46 17.49
17.49 16.46 17.49 16.46 17.49
17.49 16.46 16.46 16.46 17.49
14.4 17.49 17.49 17.49 14.4
17.49 14.4 14.4 14.4 17.49
17.49 17.49 17.49
Node 12: 88-96 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 165: Average burnable poison loading (grams) per node for the 33rd core.
17.49
14.4 17.49
14.4 17.49
14.4 17.49
17.49
17.49
14.4 17.49
14.4 17.49
14.4 17.49
17.49
17.49
14.4 17.49
14.4 17.49
14.4 17.49
17.49
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
231
Fuel Assembly U235 Enrichment per Node for 32nd Axial Core
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 1: 0-8 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 4: 24-32 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 7: 48-56 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 5: 32-40 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 8: 56-64 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 3: 16-24 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 6: 40-48 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 9: 64-72 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Figure 166: Fuel assembly U235 enrichment per node for the 33rd core.
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
232
Average Burnable Poison Loading (grams) per Node for 33rd Axial Core
45.27
45.27 14.4
45.27 14.4
45.27 14.4
45.27
45.27
45.27 14.4
45.27 14.4
45.27 14.4
45.27
45.27
45.27 14.4
45.27 14.4
45.27 14.4
45.27
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 1: 0-8 cm
45.27 45.27 45.27
45.27 14.4 14.4 14.4 45.27
14.4 45.27 45.27 45.27 14.4
45.27 16.46 16.46 16.46 45.27
45.27 16.46 45.27 16.46 45.27
45.27 16.46 16.46 16.46 45.27
14.4 45.27 45.27 45.27 14.4
45.27 14.4 14.4 14.4 45.27
45.27 45.27 45.27
Node 4: 24-32 cm
45.27 45.27 45.27
45.27 14.4 14.4 14.4 45.27
14.4 45.27 45.27 45.27 14.4
45.27 16.46 16.46 16.46 45.27
45.27 16.46 45.27 16.46 45.27
45.27 16.46 16.46 16.46 45.27
14.4 45.27 45.27 45.27 14.4
45.27 14.4 14.4 14.4 45.27
45.27 45.27 45.27
Node 7: 48-56 cm
45.27 45.27 45.27
45.27 14.4 14.4 14.4 45.27
14.4 45.27 45.27 45.27 14.4
45.27 16.46 16.46 16.46 45.27
45.27 16.46 45.27 16.46 45.27
45.27 16.46 16.46 16.46 45.27
14.4 45.27 45.27 45.27 14.4
45.27 14.4 14.4 14.4 45.27
45.27 45.27 45.27
Node 10: 72-80 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 13: 96-104 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 16: 120-128 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 19: 144-152 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 22: 168-176 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
45.27
45.27
14.4 45.27 45.27 14.4
14.4 45.27 45.27 14.4
14.4 45.27 45.27 14.4
45.27
45.27
45.27
45.27
14.4 45.27 45.27 14.4
14.4 45.27 45.27 14.4
14.4 45.27 45.27 14.4
45.27
45.27
45.27
45.27
14.4 45.27 45.27 14.4
14.4 45.27 45.27 14.4
14.4 45.27 45.27 14.4
45.27
45.27
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 2: 8-16 cm
45.27 45.27 45.27
45.27 14.4 14.4 14.4 45.27
14.4 45.27 45.27 45.27 14.4
45.27 16.46 16.46 16.46 45.27
45.27 16.46 45.27 16.46 45.27
45.27 16.46 16.46 16.46 45.27
14.4 45.27 45.27 45.27 14.4
45.27 14.4 14.4 14.4 45.27
45.27 45.27 45.27
Node 5: 32-40 cm
45.27 45.27 45.27
45.27 14.4 14.4 14.4 45.27
14.4 45.27 45.27 45.27 14.4
45.27 16.46 16.46 16.46 45.27
45.27 16.46 45.27 16.46 45.27
45.27 16.46 16.46 16.46 45.27
14.4 45.27 45.27 45.27 14.4
45.27 14.4 14.4 14.4 45.27
45.27 45.27 45.27
Node 8: 56-64 cm
45.27 45.27 45.27
45.27 14.4 14.4 14.4 45.27
14.4 45.27 45.27 45.27 14.4
45.27 16.46 16.46 16.46 45.27
45.27 16.46 45.27 16.46 45.27
45.27 16.46 16.46 16.46 45.27
14.4 45.27 45.27 45.27 14.4
45.27 14.4 14.4 14.4 45.27
45.27 45.27 45.27
Node 11: 80-88 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 14: 104-112 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 17: 128-136 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 20: 152-160 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 23: 176-184 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
45.27
45.27
14.4 45.27 45.27 14.4
14.4 45.27 45.27 14.4
14.4 45.27 45.27 14.4
45.27
45.27
45.27
45.27
14.4 45.27 45.27 14.4
14.4 45.27 45.27 14.4
14.4 45.27 45.27 14.4
45.27
45.27
45.27
45.27
14.4 45.27 45.27 14.4
14.4 45.27 45.27 14.4
14.4 45.27 45.27 14.4
45.27
45.27
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 3: 16-24 cm
45.27 45.27 45.27
45.27 14.4 14.4 14.4 45.27
14.4 45.27 45.27 45.27 14.4
45.27 16.46 16.46 16.46 45.27
45.27 16.46 45.27 16.46 45.27
45.27 16.46 16.46 16.46 45.27
14.4 45.27 45.27 45.27 14.4
45.27 14.4 14.4 14.4 45.27
45.27 45.27 45.27
Node 6: 40-48 cm
45.27 45.27 45.27
45.27 14.4 14.4 14.4 45.27
14.4 45.27 45.27 45.27 14.4
45.27 16.46 16.46 16.46 45.27
45.27 16.46 45.27 16.46 45.27
45.27 16.46 16.46 16.46 45.27
14.4 45.27 45.27 45.27 14.4
45.27 14.4 14.4 14.4 45.27
45.27 45.27 45.27
Node 9: 64-72 cm
45.27 45.27 45.27
45.27 14.4 14.4 14.4 45.27
14.4 45.27 45.27 45.27 14.4
45.27 16.46 16.46 16.46 45.27
45.27 16.46 45.27 16.46 45.27
45.27 16.46 16.46 16.46 45.27
14.4 45.27 45.27 45.27 14.4
45.27 14.4 14.4 14.4 45.27
45.27 45.27 45.27
Node 12: 88-96 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 15: 112-120 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 18: 136-144 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 21: 160-168 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Node 24 and 25: 184-200 cm
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 167: Average burnable poison loading (grams) per node for the 34th core.
45.27
14.4 45.27
14.4 45.27
14.4 45.27
45.27
45.27
14.4 45.27
14.4 45.27
14.4 45.27
45.27
45.27
14.4 45.27
14.4 45.27
14.4 45.27
45.27
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
233
Fuel Assembly U235 Enrichment per Node for 33rd Axial Core
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 1: 0-8 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 4: 24-32 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 7: 48-56 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 10: 72-80 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 13: 96-104 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 16: 120-128 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 19: 144-152 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 22: 168-176 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.95
4.95
4.95
2.50
2.50
2.50
2.50
2.50
2.50
Node 2: 8-16 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 5: 32-40 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 8: 56-64 cm
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
4.95 4.95 4.95
Node 11: 80-88 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 14: 104-112 cm
2.50 2.50 2.50
4.00 4.00 4.00
3.50 3.50 3.50
3.00 3.50 3.00
3.50 3.00 3.50
3.00 3.50 3.00
3.50 3.50 3.50
4.00 4.00 4.00
2.50 2.50 2.50
Node 17: 128-136 cm
2.50 2.50 2.50
3.50 3.50 3.50
3.00 3.00 3.00
2.50 3.00 2.50
3.00 2.50 3.00
2.50 3.00 2.50
3.00 3.00 3.00
3.50 3.50 3.50
2.50 2.50 2.50
Node 20: 152-160 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
Node 23: 176-184 cm
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
2.50 2.50 2.50
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
4.00
3.50
3.50
3.50
4.00
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
3.50
3.00
3.00
3.00
3.50
2.50
2.50
3.50
3.50
3.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
Node 3: 16-24 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 6: 40-48 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 9: 64-72 cm
4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95 4.95 4.95
4.95 4.95 4.95
Node 12: 88-96 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 15: 112-120 cm
2.50 2.50 2.50
2.50 4.00 4.00 4.00 2.50
4.00 3.50 3.50 3.50 4.00
3.50 3.00 3.50 3.00 3.50
3.50 3.50 3.00 3.50 3.50
3.50 3.00 3.50 3.00 3.50
4.00 3.50 3.50 3.50 4.00
2.50 4.00 4.00 4.00 2.50
2.50 2.50 2.50
Node 18: 136-144 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 21: 160-168 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Node 24 and 25: 184-200 cm
2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50 2.50 2.50
2.50 2.50 2.50
Figure 168: Fuel assembly U235 enrichment per node for the 34th core.
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
4.95
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
4.00
4.00
4.00
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50