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Frame design Status

ITER. Frame design Status. TB-SWG 30-31 May 2005 Presented by K. Ioki Prepared by M. Morimoto VV and Blanket Division, ITER Garching. Flexible supports. TBM. Box. Box (Partition). First Walls. TBM. Keys. Stainless Steel. Backside Shields. Electrical Strap. 200.

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Frame design Status

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  1. ITER Frame design Status TB-SWG 30-31 May 2005 Presented by K. Ioki Prepared by M. Morimoto VV and Blanket Division, ITER Garching

  2. Flexible supports TBM Box Box (Partition) First Walls TBM Keys Stainless Steel Backside Shields Electrical Strap 200 Cross sectional view of the First Wall on the frame Definitions of names for “Frame” Port plug = Frame + TBMs Frame=FW structure + Box structure + Backside shields First wall structure

  3. Frame Thickness and Nuclear Shielding Efficiency- Nuclear analysis for different thickness of the framebox structure - Analysis model for vertical type of the frame with TBM Nuclear Heating Rate in the VV port Result: The maximum nuclear heating rate: 0.075 , 0.097 and 0.17 MW/m3 for the reference plug, 20cm and 10cm thick frame cases, respectively. 20 cm thick frame can achieve the similar level of nuclear shielding efficiency as the reference port plug case. Backside Shield TBM Box walls (10cm case) distance TBM: 20% Eurofer97 + 50% PbLi + 30% Helium, Reference port plug: 60% SS316L(N)IG + 20% Water + 20 % Void

  4. Frame Thickness 200 mm - Flexibility of operation - Analysis model for vertical type of the frame with TBM Nuclear Heating Rate in the VV port The main reason of 20 cm frame thickness is “effect of ferromagnetic materials on the plasma performance”. In addition; nuclear shielding efficiency is also important. Even in case when installation of one of TBMs or sub-modules is unexpectedly cancelled, ITER can start the operation with 20 cm thick frame. Increase flexibility of the operation. Can we prepare “dammy plug(s) or dammy TBM”? Backside Shield TBM Box walls (10cm case) distance

  5. Electrical Strap Key Flexible support Key Electrical Strap Flexible support TBM support and attachments TBM is supported from the backside shields with flexible supports and keys. (Similar to the support of the shield blanket, which has been demonstrated through R&D during EDA.) An electrical strap is equipped at the centre area of the TBM to reduce electromagnetic force on the pipes.

  6. Replacement methods of TBM A. Back Access with bore tool (reference) B. Back Access without bore tool Cutting/re-welding (with hands-onin the port cell) Cutting/re-welding (with hands-on in the port cell) Cutting/re-welding (with bore tool (RH) in the hot cell) Chamber (To be replaced with TBM) C.. Side Access with side hatch D.. Front Access with bore tool Cutting/re-welding (with RH in the hot cell) Cutting/re-welding (with bore tool (RH) in the hot cell) Cutting/re-welding (with hands-onin the port cell) Cutting/re-welding (with hands-onin the port cell) Hatch (To be opened with RH in the hot cell. Including cutting/re-welding of water pipes)

  7. Comparison of the replacing methods

  8. An example of possible pipe layout with Concept A From port cell side view From plasma side view 35 mm O.D. pipe TBM region (vertical type) Flange (interface with bellows) Keys 65 mm O.D. pipe with bend 85 mm O.D. pipe with bend Flexible supports Electrical Connection Flange (interface with bellows) Pipe layout is to be determined reflecting each design of TBM. Closure plate for flexible support 2 x 85 mm pipes + 2 x 65 mm pipes + more than 13 x 35 mm pipes maybe able to be allocated

  9. An example of possible pipe layout with Concept B From port cell side view From plasma side view 35 mm O.D. pipe TBM region (vertical type) Flange (interface with bellows) Chamber Keys 65 mm O.D. pipe with bend 85 mm O.D. pipe with bend Flexible supports Chamber Electrical Connection Flange (interface with bellows) Pipe layout is to be determined reflecting each design of TBM. Closure plate for flexible support 1 x 85 mm pipes + 2 x 65 mm pipes + about 11 x 35 mm pipes maybe able to be allocated

  10. An example of possible pipe layout forTBM sub-modules with bore tool (Concept A) From port cell side view From plasma side view 35 mm O.D. pipe TBM region (vertical type) Flange (interface with bellows) Keys 65 mm O.D. pipe with bend Electrical Connection Flexible supports 65 mm O.D. pipe with bend Flange (interface with bellows) Pipe layout is to be determined reflecting each design of TBM. Closure plate for flexible support There is no space for chamber in this case 1 x 65 mm pipes + 7 x 35 mm pipes maybe able to be allocated for each TBM

  11. ITER Summary The Test Blanket Frame design is to be continued. More detail design is planned to be performed. Regarding “design code” and QA/NDT criteria, future activities are expected in couple with preparation for the shield blanket TSD and acceptance criteria.

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