1. ILC Utility Design Study for Kitakami-site
CFS WG AWLC-SLAC
ILC Utility Design Study for Kitakami-site
H. Hayano (KEK)
for
M. Yoshioka, T. Sanuki, T. Onuki, S. Narita, T. Okamura
Y. Murakami, H. Aoki, I. Kumagai, Y. Kamezawa
(Tohoku-ILC-preparation-office and KEK)
Acknowledgement to
Tohoku Electric, Toshiba, Yurtec, Takasago Thermal Eng, Atox,
Maekawa, Tobishima, QST, Iwate Pref., Oshu City, Ichinoseki City,
Ichinoseki Fire Station, AAA, LCC/ILC, KEK

2. Utility Design Targets, Conditions and Proposals
Make the overall utility design specific to Kitakami Candidate Site
Estimate Cost for All Utilities with easy decomposition
for the staging case
Estimate Installation Schedule of All Utilities
Use TDR ECM=500GeV Accelerator (high-lumi upgrade) as a basement
Two Vertical Shafts and One slope access in the collision point site
One slope access in Damping Ring Far End streight section (proposal)
Design change for under-ground access halls and passway (proposal)
Six Slope Access for Linac, such as PM+/-8, PM+/-10, PM+/-12
No PM+/-13(escape access, water-drain)
but One water-drain tunnel from the collision point (proposal)

3. Name Convention Interaction Region PM-12 AH-12 AS-0 AS-0a AS-12 PM-10
electron linac
AS-0a
AS-12
AH-10
PM-10
AS-0b
AH-0a
AS-10
PM-8
AH-8
AH-0
Interaction Region
AS-8
damping
ring
PM+8
AH+8
AS+8
PM+10
AH+10
positron linac
AS: Access Station (surface)
AH: Access Hall (in tunnel)
PM: Point of Merging with access tunnel
AS+10
PM+12
AH+12
AS+12

4. Electric Power Distribution Design

5. Electricity Access
Redundant power supply from (1) Local electric company and (2) LNG-CGS
Mizusawa Station
J-PARC
154 kV, 15 km
Aerial wire
Riken
Main substation
co-generation
J-PARC
Main substation

6. Electric Power from Tohoku Electric Co, Mizusawa Station
ILC Trans Yard
(reserved!)
Reserved Trans Yards
Two 154kV Trans Yards

7. Electric Power Load Table

8. Design of Electric Power Line System (1)
Main subsation
66 kV Co-generation
Substation
66 kV Lines
154 kV receive
at AS-0 surface
66 kV receive
at every AH in the tunnel
6.6 kV Lines
Local Station
66 kV Lines Distribution in tunnel
6.6 kV receive
at Main Linac Klystron Tunnel
(400V, 200V, 100V distributed)
Main subsation

9. Design of Electric Power Line System (2)
Main subsation
66 kV Co-generation
Substation at Access Hall
66 kV Lines
6.6 kV Lines
154 kV
receive
LNG space
Local Station
AH tunnel
AS surface
Number of local substation
54 in total
splittable racks,
distribute in-between
Klystrons
Linac RF tunnel

10. Air, Cooling Water Distribution Design

11. Cooling Water Supply from Oshu-city
Water supply system from the Isawa dam facility to the access stations through pipe in the linac tunnel (250 A)
Banshouji
point
~13km
Isawa Dam
ILC
From Oshu-city
Banshouji Point,
water supply availble. IP

12. Design of Cooling Water System
Chiller and pumps
Main Linac Cooling Water Schematics
Access Station
Access Hall
Main Linac
He compressor cooling
Design conditions;
35 degree supply, DT = 30 degree
(15 degree for racks and WG, 5 degree for He compressor),
T control = +/- 1degree ordinary device,
Pressure-forward,backward = determined from flow rate
and pipe diameter,
required flow-rate = from sum-up of RF unit power,
assumed values for BDS and DR
Water reservoir & supply

13. Design of He Compressor Cooling Water System
Circulation
pump
32℃
8 compressor for
one cryo plant
DT =5C
37℃
Ground surface
Access station
Outdoor yard
Closed water
cooling type
cooling tower
Machine room
Compressor room
Circulation pump
32℃
37℃

14. Design of Water Drainage System
Access Station
(surface)
Access Hall (tunnel)
Design conditions;
drainage spring water from tunnel surface
to the surface,
use spring water as cooling water, or just dump

15. Design of Ventilation System
RF tunnel
accelerator tunnel
Design conditions;
1/3 of circulation air is exhausted out
with HEPA filter,
1/3 fresh air is taken in.
put air into RF tunnel, exhaust air from accelerator
tunnel, through holes of shield wall.

16. Temperature Settings Matters to consider
Water temperature measurement by ground water observation hole
as a function of elevation (by Iwate Prefecture/Tohoku Univ./Yachiyo Engineering)
Matters to consider
Cooling water temperature setting with emphasis on economical operation
RF:　35℃⇒65℃
Cryo:　32℃⇒37℃
･････
Air conditioning temperature setting with emphasis on economical operation
Temperature of the under-ground (13.4℃) + α　=　18℃
depth (m)
ILC

17. Design of Air Conditioning System
Air handling Unit at the Surafce
Cooling water system for air
conditioning in the ML tunnel
(1) Distributed Fan Coil Unit.
(2) 7degree chilled water is supplied
for FC (piping with 200A).
(3) Chilled water is produced with
Chiller unit located at the AS.
Air handling Unit in Tunnel
Distributed Fan-Coil Unit in RF Tunnel,
no FC in accelerator tunnel.

18. Design of Main Dump Water Cooling System
Pump and Chiller Unit in Surface
Pump Unit in Tunnel

19. Design of RI Water Drainage System
undergorund
surface

20. Cryogenics Arrangement Design

21. Design of Helium Cryogenics System (1)
Surface
Access Tunnel
Access Hall
Accelerator Tunnel

22. Design of Helium Cryogenics System (2)
Surface
Facility
Cold Box in Access Hall
Accelerator Tunnel
side
Access Tunnel side

23. Proposals of surface facility Design

24. Collision Point Surface
AS-0 surface
Collision Point Surface
Total Area ha
each zone is splittable,
Area shape can be modified

25. Damping Ring Access Surface
AS-0a surface
Damping Ring Access Surface
Total Area ha
each zone is splittable,
Area shape can be modified

26. Main Linac Access Surface
AS-12 surface
Main Linac Access Surface
Total Area 1.66 ha
each zone is splittable,
Area shape can be modified

27. Change proposals
of underground facility Design

28. Proposal of Utility Cavern Movement at Interaction Point
Considering power flow, water flow and air flow between the surface through utility shaft
and the accelerator devices, location of Utility Cavern is reconsidered.
Surface Facility
to DR
to DR
Energy Flow
Vertical shaft
Utility Cavern
to DR
to DR
Energy Flow
tunnel
to RTML
to RTML
Underground accelerator
to ML, BDS, BD
to ML, BDS, BD
to DH

29. Proposal of Utility Cavern Movement at Interaction Point
Considering power flow, water flow and air flow between utility shaft and the devices,
TDR modified (two vertical shafts)
Proposed design of Utility cavern
Floor Area
50m x 20m
= 1000 m2
Tunnel
8m x 200m
=1600 m2
Floor Area
25m x 25m
= 625 m2
Bypass tunnel
3m x 200m
=600 m2
connection tunnel
between Utility and DR
Bypass tunnels
between Utility and
ML, DH, BDS, dumps

30. Proposal of Functions of Utility Cavern extension at Detector Hall
25m Extension of Detector Hall
5th Floor
3rd Floor
4th Floor
1st Floor
2nd Floor
Concerns
accelerator/detector effect from mechanical vibration, AC power lines
effect on utility device from detector magnetic field leakage

31. Proposal of New Access Hall shape for Main Linac
TDR Access Hall
Proposal of New Access Hall shape
for Main Linac
direct access of Electric, Water/Air, Helium
to Main Linac Tunnel.
separate halls for electric, water, helium
Keep enough room for cables, pipes, ducts
and helium trasfer lines
Hall:2998 m2 tunnel: 2010 m2
total area=5008 m2 total volume=38395m3
Proposed Access Hall
go to surface
１３５ｍ
After cryogenics
change request
Hall:135m x 20m = 2700 m2 hight=13m,
tunnel:2284 m2 hight=7.5m
total area=4984 m2 , volume=52230m3

32. Proposal of pipes(He, Water and air), power cables arrangement
in the access tunnel
This figure shows only the required space in access tunnel
for cable and rack
It is not the actual installation plan
Access tunnel:
Required space for
Piping
Cable rack

33. Summary of Kitakami-site Utility Design and Proposals
Design studies for ILC Utility specific to Kitakami-site have been done
for AC power line, Water, Air-conditioning, surface area, and so on.
Several new proposals are proposed, we will continue to discuss them
for new change request.
Cost estimation is on-going for comparison to TDR
Further Design change is in consideration for more cost-down.

34. End of Slide