1. Kirby Wilcher Cooling Water Systems Engineer
Tokamak Cooling Water System Presented to ITER PROJECT 1st INFORMATION FORUM
Kirby Wilcher
Cooling Water Systems Engineer
November 15, 2006

2. Tokamak Cooling Water System Team
Jan Berry
WBS Manager
Jan Berry
WBS Manager
Karen McElhaney
System Engineer
Robyn Rose
Project Controls
Kirby Wilcher
System Engineer

3. Cooling Water System Scope based on 2001 Design
CWS Consists of 4 Systems
Tokamak Cooling Water System (TCWS)
Component Cooling Water System (CCWS)
Chilled Water System (CHWS)
Heat Rejection System (HRS)

4. Physical Boundary of TCWS
US Scope

5. Tokamak Cooling Water System
TCWS Consists of 7 Sub-systems
Primary Heat Transfer System (PHTS)
Primary First Wall & Blanket (PFW/BLK)
Diverter/Limiter (DIV/LIM)
Vacuum Vessel (VV)
Neutral Beam Injector (NB)
Chemical and Volume Control System (CVCS)
Drain and Refilling Systems
Drying System

6. Primary Heat Transfer from In-Vessel Components Fabricated by Sub-System
First Wall & Blanket (WBS ) and Neutral Beam Injector (WBS ):
Upper Pipe Chase
Vault
Diverter/Limiter (WBS ):
Lower Pipe Chase
Vacuum Vessel (WBS ):
Roof
PHTS

7. 1 GW Heat Removal Required by PHTS; Various Operating Modes
Primary Heat Transfer System (PHTS)
Operating Mode
Conditions
First Wall and Blanket
• Pulse: Thermal load (MW)
Inlet temperature (°C)
Inlet Pressure (MPa)
• Baking: Inlet temperature (°C)
~ 690
100 (212oF)
3.0 (435 psi)
240 (464oF)
4.4 (638 psi)
Diverter and Limiter
202
4.2 (609 psi)
Vacuum Vessel
• Decay heat removal:
Heat load to Vacuum Vessel (MW) 10
1.8 (261 psi)
200 (392oF)
2.4 (348 psi)
0.8 (peak)
Neutral Beam Injector
Low voltage: Thermal load (MW) Inlet temperature (°C)
High voltage: Thermal load (MW) Inlet temperature (°C)
100
<80 (176oF) 12
30 (86oF)

8. Chemical and Volume Control System; PFW/BLK

9. Chemical and Volume Control System; Various Operating Modes
Operational state or mode
Plasma Operation State
Baking
Decontamination Mode
Volumetric Flow Rate (at inlet)
45 m3/h (198 gpm)
90 m3/h (396 gpm)
Feed Coolant Temp.
148°C (298oF)
240°C (464oF)
100°C (212oF)
Return Coolant Temp.
120°C (248oF)
190°C (374oF)
83°C (181oF)
Feed Coolant Pressure
1.7 MPa (247 psi)
4.3 MPa (624 psi)
Return Coolant Pressure
3.4 MPa (493 psi)
4.6 MPa (667 psi)

10. Drain and Refilling Systems; DIV/LIM

11. Drain and Refilling Systems; Various Operating Modes
Number of drain tanks*
Total internal volume (m3)
PFW/BLK PHTS
2 (1)
~ 500 (~132,000 gal)
DIV/LIM PHTS
~ 200 (~52,800 gal)
VV PHTS 2
~ 120 (~31,700 gal)
NB injectors PHTS
2 (2)
*number of tanks in parentheses indicates those used for drainage following an in-vessel coolant leak

12. Drying System

13. Drying System; Various Operating Modes
Blow-out mode
Heat-up mode
Dry-out mode
Fluid
Nitrogen
Nitrogen + H2O (steam)
Fluid Inlet Temp.
40°C (104°F)
210°C (410°F)
Fluid Outlet Temp.
160°C (320°F)
Fluid Inlet Pressure
4.0 MPa (580 psi)
2.1 MPa (305 psi)
0.6 MPa (87 psi)

14. New Cost Share Agreement Simplifies Interfaces with Participant Teams
Initial cost share agreement divided responsibility by location (inside vault/outside vault)
New agreement divides responsibility by activity:
US no longer responsible for installation
US responsible for materials, components, and shipping
Increases US responsibility for fabrication
Pre-fabrication reduces overall ITER cost
IO responsible for engineering, on-site assembly and testing
US ITER is contributing engineering

15. Seven Sub-Systems Distributed Throughout Tokamak Building
Primary Heat Transfer:
Vault
Upper Pipe Chase
Roof
Lower Pipe Chase
Support Systems:
Draining and Refilling (WBS )
Chemical and Volume Control System (WBS )
Drying (WBS )

16. Requirements Under Review
Vendors Must Be Able to Comply with US and EU Codes & Standards
American Society of Mechanical Engineers Standards
Pressure Equipment Directive (European Union Directive)
ESPN (French Order on Nuclear Pressure Equipment)
Nuclear vs. Non-nuclear Classification of TCWS Components to be Determined by ITER and French Regulatory Authorities
Applicable Codes & Standards Still Under Review
Materials of Construction:
304L/316L Stainless Steel

17. Component Delivery by 2014

18. Additional Information
Additional information available at:
General Information
ITER Technical Basis

19. Detailed Preliminary Schedule and Milestones
Backup Information
Detailed Preliminary Schedule and Milestones

20. Preliminary Schedule

21. Preliminary Schedule (Cont.)

22. Systems Integration Preliminary Schedule and Milestones

23. First Wall and Blanket Preliminary Schedule and Milestones

24. Divertor/Limiter Preliminary Schedule and Milestones

25. Vacuum Vessel Preliminary Schedule and Milestones

26. Neutral Beam Injector Preliminary Schedule and Milestones

27. Chemical and Volume Control System— May 2013

28. Draining and Refilling Schedule—June 2010

29. Drying System Schedule—October 2013