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December 10-12, 2008/ARR1
IHHFC Workshop Proposed Publication
• Outline roughly following agenda1. 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
December 10-12, 2008/ARR2
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
December 10-12, 2008/ARR3
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)