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Page 1/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Process Analyses of ITER Toroidal Field Structure Cooling Scheme R. MAEKAWA,

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Presentation on theme: "Page 1/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Process Analyses of ITER Toroidal Field Structure Cooling Scheme R. MAEKAWA,"— Presentation transcript:

1 Page 1/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Process Analyses of ITER Toroidal Field Structure Cooling Scheme R. MAEKAWA, S. TAKAMI*, A. IWAMOTO*, H.S. CHANG, A. FORGEAS, M. CHALIFOUR, L. SERIO IO/CEP/PED/CSE *National Institute for Fusion Science At CHATS-AS October 9, 2013 Disclaimer: The views and opinions expressed herein do not necessarily reflect those of the ITER Organization

2 Page 2/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Outline

3 Page 3/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization ITER TOKAMAK CS Nb 3 Sn: 6 PF/CC NbTi: 6/6  3 Cryostat 24 m high x 28 m dia.

4 Page 4/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Background

5 Page 5/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Background

6 Page 6/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Objective; Mitigation scheme implementation

7 Page 7/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization ITER Cryogenic System ACB

8 Page 8/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization ACB-ST & ST Supply Feeder (68m) Return Feeder (38m)

9 Page 9/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization TF ST Cooling Pipe Layout BU(20)~17m long Outer Board Leg: Connected to Gravity Support BP(14)~18m AP(20)~16m AU (20)~19m Cross section of AU&AP Cooling pipe layout for BU

10 Page 10/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Massflow Rate for each Segment # of channel L (m) Transit (s) m (g/s)Ref h (W/m 2 -K) Total m (g/s) AP2016.038.42.71.18e50.018616.1154.0 BP1417.742.52.71.18e50.018616.1137.8 AU2019.0112.01.14.81e40.021300.3922.0 BU2017.2101.41.14.81e40.021300.3922.0

11 Page 11/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization ACB-ST w/ ST

12 Page 12/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Modeling BU(1) BP(1) AP(1) AU(1)

13 Page 13/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Heat Load AP1 AP2 AP3 AP4

14 Page 14/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization NOMINAL OPERATION Cope w/ Dynamic Heat Load by Adjusting Cooling power

15 Page 15/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Nominal Operation-process Arrangement of cooling circuit w/ process control

16 Page 16/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Simulation Result-Nominal operation

17 Page 17/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization SHE Loop-Nominal operation SHe loop behavior –T & P variations & m variation in each segment 1

18 Page 18/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Summary-Nominal Operation

19 Page 19/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization MITIGATION Reducing the impact of Cryoplant operation

20 Page 20/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Mitigation; Circulator Speed

21 Page 21/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Mitigation-HX Bypass HX massflow change

22 Page 22/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Mitigation-ST Bypass Massflow at ST Two disturbances for CC –POS and m regulations

23 Page 23/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Mitigation

24 Page 24/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Variation in HX and/or ST Control Action-Mitigation Speed & HX bypass ST bypass with Supply valve

25 Page 25/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization ST Cooling Effect-Mitigation Effective cooling for STLoop T variation at ST

26 Page 26/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Summary; Mitigation

27 Page 27/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Disruption

28 Page 28/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Disruption; summary

29 Page 29/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Impact from m regulation Cold Circulator Operation Disruption-NominalST bypass-Mitigation

30 Page 30/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Conclusion

31 Page 31/31 CHATS-AS October 9-11, 2013 | Cambridge, MA © 2013, ITER Organization Open Issue


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