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IHHFC Workshop Proposed Publication

IHHFC Workshop Proposed Publication. • Outline roughly following agenda 1. Introduction 2. Near term HHFC design and R&D (ITER) (R. Nygren) 3. Long term HHFC concepts (Power plants) (R. Raffray)

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IHHFC Workshop Proposed Publication

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  1. IHHFC Workshop Proposed Publication • Outline roughly following agenda 1. Introduction 2. Near term HHFC design and R&D (ITER) (R. Nygren) 3. Long term HHFC concepts (Power plants) (R. Raffray) 4. Material aspects for near term and long term concepts 3.1 development/fabrication/joining (D. Hoelzer) 3.2 plasma interaction testing aspects) (M. Roedig) 5. Physics considerations for near term and long term concepts (D. Whyte) 6. Evaluation methodology to evaluate current readiness level vis-à-vis the long term objective and how to get there (M. Tillack) 7. Discussion - issues - recommendations (R. Raffray/R. Nygren/D. Whyte/all) 8. Conclusions (All) • Session coordinators - Summarize presentations in your session + points raised in discussion - Send me contributions by January 31, 2009 • Presenters - Please send a summary of your presentation with some key figures to your session organizer (cc to me) • All other contributions welcome

  2. IHHFC Workshop -Session 2Long term HHFC concepts (power plants) • 3 presentations - EU PFC/divertor concepts for power plants -P.Norajitra - US PFC/divertor concepts for power plants - R. Raffray - Japan PFC/divertor concepts for power plants - S. Konishi/Y. Ueda • EU/US Designs presented - He-cooled, W-alloy concepts to accommodate ~10 MW/m2 - He coolant: ~10MPa; ~600-700°C - W-alloy ~700-1300°C - W armor ~1500-1800°C - Also advanced design with Pb-17Li + SiCf/SiC but limited high heat flux accommodation • Different concerns - W armor: off-normal events; erosion; T retention - Structural material: allowable window of operation

  3. IHHFC Workshop -Session 2Long term HHFC concepts (power plants) • For all designs, W alloy development required to widen operating temp. range and to develop reliable fabrication and joining processes. - ~700°C (governed by W ductility considerations) to enable coupling to an ODS ferritic steel manifold - ~1300°C (governed by the W recrystallization limit) to provide desirable high-temperature capability) • Need ODS FS with high enough temperature for joining with W - ~ 800°C • Off normal events - thermal effects on PFC - a few disruptions a year (~ 3-10MJ/m2, 1-3 ms) - No VDE (~60 MJ/m2, 0.2 s) - A few uncontrolled ELMs (~1.5 MJ/m2 over 0.4 ms) - Controlled ELM’s perhaps acceptable with W (~0.3 MJ/m2 over 0.4 ms)

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