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US ITER DCLL TBM Design

Outline. Key features of DCLL blanket conceptsSelection of DCLL TBM R

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US ITER DCLL TBM Design

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    2. Outline Key features of DCLL blanket concepts Selection of DCLL TBM R&D items for DCLL DEMO and HH-TBM Utility of DCLL HH-TBM DCLL HH-TBM and Ancillary Loops Design Development Schedule

    3. Key Features of Dual Coolant Lead-Lithium (DCLL) Concepts Helium is used to cool first wall and reduced activation ferritic steel (RAFS) e.g. F82H structure. Helium is also used for first wall/blanket preheat and tritium control. Breeder is self-cooled PbLi moving at a slow velocity < 10 cm/s. – allowing high Tout (700°C) leading to ?th~ 40% (CCGT) Use SiC flow channel inserts (FCI) to: provide electrical and thermal insulation to reduce MHD pressure drop and to decouple high temperature PbLi bulk flow from cooler RAFS structure, also provide higher corrosion resistance temperature with only near stagnant PbLi in contact with the RAFS in the gap

    5. DCLL Fusion Reactor (DEMO) Blanket Can Achieve High ?th

    6. DEMO DCLL Blanket R&D Items are Performance Related DCLL TBM HH-Module has Few Critical Issues

    7. Four Phases of DCLL TBM for the 1st 10 years in ITER

    9. For DEMO PbLi Temperature is Strongly Dependent on s of SiC For DT-module PbLi/RAFS Interface Temperature <470° C

    10. HH-TBM Design and Ancillary Loops Design

    11. DCLL TBM Assembly

    12. DCLL TBM Assembly Exploded View, Major Components

    14. DCLL TBM Design, PbLi Flow Scheme

    15. DCLL TBM Design, He Flow Scheme, Circuits/Passes

    16. DCLL TBM Design, He Flow Scheme, Inlet Manifold

    17. Tritium Production

    18. DCLL TBM Ancillary Equipment Loops

    20. PbLi Loop Schematic

    21. US TBM PRIMARY AND SECONDARY Helium LOOPS

    23. Primary Helium Loop Details

    25. DCLL blanket concept has been proposed and well-studied by US and EU blanket and reactor design experts US team selected the DCLL TBM after extensive reviews and assessments With RAFS, DCLL blanket concept has the potential to be a high performance blanket (gross ?th~40%) for DEMO with minimum critical issues Clear R&D paths have been identified for DEMO and DCLL TBM, many items are common to the EU HCLL TBM Design DCLL TBM has strong common interest from China and Japan US has unique capabilities to address identified R&D items - RAFS fabrication is under development with inputs from US vendors - SiC composite FCI is the key for high thermal and blanket performance Requirements on SiC composite for FCI are much lower than for SiC first wall and the development can piggyback on decades of study on SiC as structural material and with input from US vendors - MHD analysis and experiments have made significant progress We are completing the second iteration of the DCLL TBM pre-conceptual design Primary and secondary helium loops and PbLi loop and corresponding components have been identified with well defined WBS structure DCLL TBM is ready to proceed to the preliminary design phase

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