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Document No
Date
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Aug 06, 2015
INTERFACE SHEET
FOR THE INTERFACE BETWEEN
THE CRYOGENIC DISTRIBUTION SYSTEM
FOR ELLIPTICAL LINAC
AND
THE CRYOGENIC DISTRIBUTION SYSTEM
FOR SPOKE LINAC
Authors
Reviewer
Approver
Name
J. Fydrych, P.Tereszkowski
X. Wang
Ph. Arnold
Affiliation
ESS
ESS
ESS
DOCUMENT REVISION HISTORY
Version
1.0
Reason for revision
Document creation
Date
28.04.2014
1.1
Fx values in Table 3 were increased.
27.05.2015
1.2
Relocation of the cryomodules in the linac tunnel (Changes in
Figures 1 and 3, and in Tables 1 and 2)
06.08.2015
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SUMMARY
This document provides the technical parameters of the interface between the Cryogenic Distribution
System for Elliptical Linac and the Cryogenic Distribution System for Spoke Linac. The location of
the interfaces for the Cryogenic Distribution Lines and four auxiliary process lines are given together
with the permissible forces for the process pipes, radiation shields and external envelopes.
TABLE OF CONTENT
Document Revision History ................................................................................ 1
Summary .......................................................................................................... 2
Table of content ................................................................................................ 2
1.
Introduction ........................................................................................................ 3
2.
Location and arrangement of the interfaces ............................................................... 3
3.
Mechanical properties of the interfaces ..................................................................... 8
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INTRODUCTION
The Cryogenic Distribution system for the ESS accelerator is composed of two following system:


Cryogenic Distribution System for Elliptical Linac, and
Cryogenic Distribution System for Spoke Linac.
Interface
to the ACCP
Helium recovery line
HP line
Purge return
CDS for the elliptical
linac
SV relief line
Cryogenic
Transfer Line
Auxiliary
Process Lines
TS supply line
TS return line
Interface between
the CDS subsystems
Figure 1 shows a flow scheme of the cryogenic distribution system for the ESS linac. The interface
between the CDS for Elliptical Linac and the CDS for Spoke Linac is located between the valve boxes
for crymodules Spk-13 and MB-01. The aim of this document is to provide the technical parameters of
the interface between these two systems. The interface includes the connections of the Cryogenic
Distribution Line and four main auxiliary process lines. The Cryogenic Distribution Line consists of
external envelope, radiation shield and four main cold process lines: He supply line (MC), VLP line
(MB), TS supply line (ME) and TS return line (MF). The main auxiliary process lines are Helium
recovery line (MR), HP line (MH), Purge return line (MP) and SV relief line (MS). The document
describes the locations of the line interfaces, the positions and tolerances of the interface centres as
well as the permissible forces between the pipes in the interfaces.
CDS for the spoke
linac
He supply line
VLP line
Cryogenic Distribution Line
Splitting
box
Valve
box
Valve
box
Cryomodule HB-30
Valve
box
Cryomodule MB-01
End
box
Valve
box
Cryomodule Spk-13
Cryomodule Spk-01
Figure 1. General flow scheme of the cryogenic distribution system for the ESS linac
2.
LOCATION AND ARRANGEMENT OF THE INTERFACES
The interface between the Cryogenic Distribution Systems for Elliptical Linac and for Spoke Linac is
located in the accelerator tunnel between Medium Beta Valve Box 01 and Spoke Valve box 13.
Figures 2 and 3 show the locations of interface points for the Cryogenic Distribution Line (interface
point 1) and auxiliary process lines (interface point 2). The locations of these points are dimensioned
from interface point MB01 at the interface between the Valve box and Medium Beta Cryomodule No
01. The coordinates of interface point MB01 are X = 488934 mm, Y = 244 mm and Z = -3255 relative
to the TCS coordinate system (refer to ESS-0002691).
The arrangement of the cold process lines in the interface of Cryogenic Distribution Line (CDL) is
shown in Figures 4 and 5. The centre of the interface (Interface point 1) is in the centre of the external
envelope end. The positions of the cold process lines are given in respect to Interface point 1. Table 1
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gives the coordinates and tolerances for the external envelope (Interface point 1), cold process lines
and thermal shield.
The arrangement of the auxiliary process lines in the interface is shown in Figure 6. The positions of
these lines are given in respect to Interface point 2, which is placed in the cross section centre of
Helium recovery line. The coordinates and tolerances for the auxiliary process line interfaces are given
in Table 2.
Figure 2. Locations of the interface points at the medium beta valve box MB-Vbox01
in the accelerator tunnel – side view
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Figure 3. Locations of the interface points at the medium beta valve box MB-Vbox01
in the accelerator tunnel – top view
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Figure 4. Arrangement of the cold process pipes in the CDL interface - side view
Figure 5. Arrangement of the cold process pipes in the CDL interface - front view
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Figure 6. Arrangement of the interface of the auxiliary process lines - front view
Table 1. Coordinates and tolerances for the Cryogenic Distribution Line interface
Coordinates
Pipe
Tolerances
X [mm]
Y [mm] Z [mm]
X [mm]
Y [mm]
Z [mm]
TS supply line (ME)
273 a
-151 a
-91 a
2 a
2 a
2 a
TS return line (MF)
273 a
0a
-194 a
2 a
2 a
2 a
He supply line (MC)
257 a
107 a
-132 a
2 a
2 a
2 a
VLP line (MB)
256.5 a
0a
72 a
2 a
2 a
2 a
Thermal shield
70 a
0a
0a
2 a
2 a
2 a
495056 b
1350 b
-4591 b
6270 c
1106 c
-1336 c
10 b
5 b
5 b
External envelope
(Interface point 1)
a
Coordinates and tolerances in respect to Interface point 1 (refer to Figures 4 and 5)
b
Coordinates relative to the TCS coordinate system. X, Y and Z-axes of the local coordinate
system correspond to the coordinate axes in TCS
c
Coordinates in respect to Interface point MB01 at the interface to the Medium Beta Cryomodule
No 01 (refer to Figures 2 and 3)
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Table 2. Coordinates and tolerances for the interface of the auxiliary process lines
Coordinates
Pipe
X [mm]
Y [mm]
Tolerances
Z [mm]
X [mm]
Y [mm] Z [mm]
HP line (MH)
0a
0a
-420 a
2 a
2 a
2 a
Purge return line
(MP)
0a
-60 a
-340 a
2 a
2 a
2 a
SV relief line (MS)
0a
140 a
-230 a
2 a
2 a
2 a
494936 b
1950 b
-2700 b
10 c
5 c
5 c
Helium recovery line
(MR)
(Interface point 2)
a
6150
c
1706
c
555
c
Coordinates and tolerances in respect to Interface point 2 (refer to Figure 6)
b
Coordinates relative to the TCS coordinate system. X, Y and Z-axes of the local coordinate
system correspond to the coordinate axes in TCS
c
Coordinates in respect to Interface point MB01 at the interface to the Medium Beta Cryomodule
No 01 (refer to Figures 2 and 3)
3.
MECHANICAL PROPERTIES OF THE INTERFACES
The cold process pipes at the interface of the Cryogenic Distribution Line and the process pipes of
Helium recovery line and SV relief line at the interface of the auxiliary process lines shall be
manufactured in austenitic stainless steels suitable for the use at very low temperatures. The choice of
materials has to be in line with the Pressure Vessel Directive 97/23/EC and must be done according to
SS-EN 13480-2.
All process gas carrying components must be fabricated of austenitic stainless steel and/or austenitic
stainless steel tubes with test certificate according to EN 10204-3.1. The vacuum vessels of the
cryogenic transfer line and Helium recovery line shall be made of appropriate austenitic stainless steel
like 1.4306 or equivalent from welded pipes or rolled sheets.
The permissible forces for the process pipes, thermal shield and external envelope for the interfaces
between the Cryogenic Distribution Lines and between the auxiliary process lines are presented in
Table 3 and 4, respectively.
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Table 3. Permissible forces in the Cryogenic Distribution Line interface
Pipes
Dimensions [mm]
Pressure [bar]
Fx [kN]
Fy [kN]
Fz [kN]
VLP line (MB)
DN200 (219.1x2.6)
6.0
40.0
10.0
15.0
TS supply line
(ME)
DN50 (60.3x2.3)
25.0
17.0
10.0
15.0
He supply line
(MC)
DN65 (76.1x2.3)
6.0
10.0
10.0
15.0
TS return line
(MF)
DN50 (60.3x2.3)
25.0
17.0
10.0
15.0
Thermal shield
 475x2
NA
0.0
0.0
0.0
External envelope
DN550 (558.8x4.8)
50.0
20.0
40.0
from -1.0 (g)
to 0.5 (g)
Table 4. Permissible forces in the interface of the auxiliary process lines
Pipes
Dimensions [mm]
Pressure [bar]
Fx [kN]
Fy [kN]
Fz [kN]
Helium recovery
line (MR)
DN80 (88.9x2.3)
6.0
10.0
10.0
10.0
HP line (MH)
DN32 (42.4x2.0)
25.0
10.0
10.0
10.0
Purge return line
(MP)
DN50 (60.3x2.3)
6.0
10.0
10.0
10.0
SV relief line (MS) DN200 (219.1x2.6)
6.0
10.0
10.0
10.0
External envelope
of Helium recovery DN150 (168.3x2.6)
line
from -1.0 (g)
20.0
20.0
40.0
to 0.5 (g)
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