Westinghouse Non-Proprietary Class 3
© 2011 Westinghouse Electric Company LLC. All Rights Reserved.
Westinghouse SMR Product Development
Innovating and Optimizing
Advances in Nuclear Technology
Michael Anness
SMR Product Manager
IAEA Workshop
Vienna, Austria
December, 2011
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Westinghouse Non-Proprietary Class 3
© 2011 Westinghouse Electric Company LLC. All Rights Reserved.
Westinghouse’s Vision
Westinghouse will be the first to deploy a safe, economical SMR to meet
the many needs of existing and new to nuclear customers
Working within constraints
• Land, grid, cooling water, financing,
distributed service territory
Offering clean energy
• Offset owner costs for infrastructure
development: land, cooling, T&D
• Generation diversity
• Operational flexibility
Providing project certainty
• Reduced licensing risk
• Short-construction durations
• Cost predictability and certainty
New applications for nuclear…
Aging Fossil Plants
District Heating
Remote Markets
Small Grid Markets
Desalination
Process Heat
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Westinghouse Non-Proprietary Class 3
© 2011 Westinghouse Electric Company LLC. All Rights Reserved.
SMR Product Philosophy
Best opportunity for cost competitiveness
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Most power with the least amount of material
Fully-modular design
Plant modules that are installed, not constructed
Rail & truck transportable
Speed to market
• Proven ability to design, license & deploy reactors
• Existing technical skills, licensed technologies & supply
chain
• Designing to eliminate supply chain bottlenecks
• Leveraging AP1000® plant experience and lessons learned
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Westinghouse Non-Proprietary Class 3
© 2011 Westinghouse Electric Company LLC. All Rights Reserved.
SMR Product Specifications
Specifications
Thermal Output
Electrical Output
Passive Safety Systems
Core Design
Reactor Vessel Size
Upper Vessel Package
Containment Vessel Size
Reactor Coolant Pumps
Steam Generator
Pressurizer
Instrumentation and Control
800 MWt
>225 MWe
No operator intervention required for 7
days
17x17 Robust Fuel Assembly
8.0 ft / 2.4 m Active Length
< 5.0% Enriched U235
89 Assemblies
Soluble Boron and 37 Internal CRDMs
24 month refueling cycle
Outer Diameter: 11.5 ft / 3.5 m
Height: 81 ft / 24.7 m
280 Tons / 254000 kg.
Outer Diameter: 32 ft / 9.7 m
Height: 89 ft / 27.1 m
Fully Modular Construction
8 External, Horizontally-Mounted Pumps
Sealless Configuration
Recirculating, Once-Through, Straight
Tube
Integral to Vessel
OVATION®-based Digital Control System
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Westinghouse Non-Proprietary Class 3
© 2011 Westinghouse Electric Company LLC. All Rights Reserved.
SMR Plant Design
• Containment Vessel Below
Turbine Building
Grade
• All Safety Systems Protected
by Reactor Building
Annex
Maintenance Hall
Radwaste
Grade
Nuclear Island
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Westinghouse Non-Proprietary Class 3
© 2011 Westinghouse Electric Company LLC. All Rights Reserved.
Containment Vessel (CV) Overview
Compact, High-Pressure Design
• Water-covered
• Penetrations designed for
refueling and outage
– Large external and internal
pressure
• Removable top head
• Accommodates modular
installation
Containment
Vessel
Pressurizer
Core Makeup
Tank
Steam
Generator
Reactor
Coolant
Pumps
Internal
Control Rod
Drives
Reactor Core
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Westinghouse Non-Proprietary Class 3
© 2011 Westinghouse Electric Company LLC. All Rights Reserved.
Integral Reactor Overview
• Reactor Vessel (RV)
– Includes Pressurizer (PZR) and Steam
Generators (SG)
– Reactor Coolant Pump (RCP) mounted
to RV shell
– Support pads welded to lower shell
– Intermediate flange
– Traditional bolted flange
Pressurizer
Steam
Generator
RCPs
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Westinghouse Non-Proprietary Class 3
© 2011 Westinghouse Electric Company LLC. All Rights Reserved.
Recirculating Steam Generators
• Straight-tube steam generator
– Flow from top to bottom of
tubes
• Hot leg located in center of tube
bundle
– Transfers hot water to the
upper tube sheet
• Main steam and feedwater piping
connections
• Recirculating steam generator with
steam/water mixture delivered to
steam drum outside containment
Tubesheet
Tubes
Tube supports
Wrapper
Hot Leg
Transition Cone / Cold
Leg
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Westinghouse Non-Proprietary Class 3
© 2011 Westinghouse Electric Company LLC. All Rights Reserved.
SG Internals
Tubesheet
Containment Wall
Steam Generator
External Steam Drum
Steam Nozzle to
Turbine
Steam and Feed
Nozzles
Tubes
Tube supports
Feedwater
Nozzle
Secondary
Separators
Primary
Separators
Wrapper
Sludge Collector
Hot Leg
Recirculation
Nozzle
Transition Cone / Cold
Leg
Wet Steam
Nozzle
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Westinghouse Non-Proprietary Class 3
© 2011 Westinghouse Electric Company LLC. All Rights Reserved.
Steam Drum Design
Dry Steam Flow Path
•Wet Steam Nozzle
•Lower Deck Plate
•Primary Separators
•Secondary Separators
•Steam Outlet Nozzle
Recirculating Liquid Flow Path
•Wet Steam Nozzle
•Lower Deck Plate
•Primary Separators
•Lower Drum
•Recirculation Nozzle
Typical Design Features
Elevated Feedring with Spray nozzles
Primary Separators
Feedwater Flow Path
•Feedwater Nozzle
•Lower Drum
•Recirculation Nozzle
Secondary Separators
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Westinghouse Non-Proprietary Class 3
© 2011 Westinghouse Electric Company LLC. All Rights Reserved.
Fuel Assembly Overview
181.71 Inconel Top Grid Elevation
Non-mixing Vane Grid
Mixing Vane Grid (Total 8)
164.39 Mid Grid Elevation
Based on proven 17x17 RFA design
J=1
153.73IFM Elevation
IFM Grid (Total 4)
Upper Core Plate
144.09 Mid Grid Elevation
Top Mounted Core
Instrumentation
WSMR
LM0001
Inconel Top Grid
RFA2 Mid-Grid
Grid
 EnhancedNon-mixing
strengthVane
188.800
 Enhanced fretting margin
Mixing
Grid (Total 8)
 ZIRLO®
grid Vane
material
IFM Grid (Total 4)
Opt. ZIRLO® Cladding
Westinghouse Integral Nozzle (WIN)
133.43IFM Elevation
 No potential for loose parts
J=5
123.79
Gridcasting
Elevation
 OneMid
piece
113.13IFM Elevation
181.71 Inconel
Top Grid Elevation
Skeleton
structure
103.49 Mid Grid Elevation
 Enhanced dimensional stability
164.39
Mid Grid
Elevation
 ZIRLO®
thimble
tubes
92.83 IFM Elevation
 Thick thimble tubes
J=3
153.73IFM
Elevation
83.19
Mid Grid
Elevation
 Tube-in-tube
dashpot
design
 Anti-bowing
design prevents IRI
144.09
Mid Grid Elevation
62.89 Mid Grid Elevation
IFBA, ZrB2 Integral Fuel
Burnable Absorber
133.43IFM Elevation
42.59 Mid Grid Elevation
123.79 Mid Grid Elevation
23.97 Mid Grid Elevation
113.13IFM Elevation
Inconel Bottom Grid
188.800
Non-mixing Vane Grid
Oxide Coated
Cladding
Protective
Grid
Bottom Nozzle
Stand-off
Plenum
103.49 Mid Piece/Bottom
Grid Elevation
6.66 Inconel Bottom Grid Elevation
92.83 IFM Elevation
3.223 Inconel Protective Grid Elevation J = 3
83.19
Mid GridGrid
Elevation
Protective
(P-Grid)
Base Line Elevation (0.0)
Low Profile Debris
Filter
Lower Core
Plate
Bottom Nozzle (LP DFBN)
J=2
62.89 Mid Grid Elevation
J=1
42.59 Mid Grid Elevation
23.97 Mid Grid Elevation
6.66 Inconel Bottom Grid Elevation
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Westinghouse Non-Proprietary Class 3
© 2011 Westinghouse Electric Company LLC. All Rights Reserved.
CRDM Design
• Latch assemblies, controls, and
interfaces with fuel are all based on
existing, proven designs
• AP1000® CRDM (including latch
assembly and coil stack) already
tested to 8 million steps in a 610°F
Test Loop
• Component testing underway
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Westinghouse Non-Proprietary Class 3
© 2011 Westinghouse Electric Company LLC. All Rights Reserved.
Containment Vessel - How Small is Small?
25 Westinghouse SMR
Containment Vessels fit in a
single AP1000® Containment
Vessel
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Westinghouse Non-Proprietary Class 3
© 2011 Westinghouse Electric Company LLC. All Rights Reserved.
Site Layout
• Required Land Area: 16 Acres
– Excavation depth 105 feet
• Multiple Units: Separation
– Security-based separation assumes a unit is operating adjacent to a unit
under construction
– Spacing prevents seismic interaction between units
• Reactor building (100’x100’) 6 levels below grade (105’ deep)
– Separate contaminated and clean areas
– Multiple safety trains separated for flooding, fire and access
• Turbine building contains BOP and
non-safety equipment only
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Westinghouse Non-Proprietary Class 3
© 2011 Westinghouse Electric Company LLC. All Rights Reserved.
SMR Safety: “Seven Days”
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Westinghouse Non-Proprietary Class 3
© 2011 Westinghouse Electric Company LLC. All Rights Reserved.
SMR Product Features
• All the advancements of the
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AP1000® reactor at a much smaller
scale
Licensed passive safety system
Simplified and standardized design
Modular
Most power from least
amount of material
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Westinghouse Non-Proprietary Class 3
© 2011 Westinghouse Electric Company LLC. All Rights Reserved.
Thank You!
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Westinghouse Non-Proprietary Class 3
© 2011 Westinghouse Electric Company LLC. All Rights Reserved.
AP1000 and ZIRLO are registered trademarks in the
United States of Westinghouse Electric Company LLC,
its subsidiaries and/or its affiliates. These marks may
also be used and/or registered in other countries
throughout the world. All rights reserved.
Unauthorized use is strictly prohibited.
Ovation is a trademark of Emerson Electric Co. Other
names may be trademarks of their respective owners.
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