Analysis for shaping the ITER first wall

作者：Stangeby P C^*; Mitteau R

来源：Journal of Nuclear Materials, 2009, 390-91: 963-966.

DOI：10.1016/j.jnucmat.2009.01.249

A fundamental difference between ITER and present devices is the need to shield against 14 MeV neutrons. This has major consequences for plasma start-up/rampdown (su/rd) and also for protecting the first wall from plasma contact. This has led to design decisions: (a) not to place in front of the n-absorbing blanket a separate wall-limiter structure, (b) to modularize the blanket into similar to 400 remote handling compatible blanket modules (BM), and (c) to shape the front face of the BMs for plasma contact. Combined protection-su/rd options are considered here for the inner and outer wall with regard to optimal shaping. Unfortunately, the modularity of the BM system (inter-BM gaps and misalignments) requires shaping of the BM faces that increases peak power loads by similar to 10x relative to the ideal (continuous, circular) wall-limiter. Fortunately, the level may still be acceptable, similar to 2 MW/m(2), even for su/rd power of 7 MW.

• 出版日期2009-6-15
• 单位中国地震局