Progress of High Heat Flux Component Manufacture and Heat Load Experiments in China
نویسندگان
چکیده
High heat flux component manufacture is the critical technology for the current fusion experimental devices and fusion reactors in the future since it will face fusion plasma directly and endure high flux particle irradiation and huge heat deposition from core plasma. Be/CuCuZr/ss, W/CuCrZr and CFC/CuCrZr modules have been selected as the high heat flux components for ITER first wall and divertor chambers, respectively. Different pure tungsten and tungsten alloys are being developed in China for ITER use and the requirements of the domestic fusion devices, meanwhile the joining technology of tungsten with heat sink CuCrZr is being developed, in particular flat structure W/CuCrZr brazed mockups by silver free CuMn solder and monoblock structure W/CuCrZr mockups by pure copper casting and hot iso-static press technique. In order to evaluate the heat load performances of high heat flux materials and components, a 60 kW electron-beam material testing scenario (EMS-60) has been constructed and a 400 kW engineering mockup testing scenario (EMS-400) is being created. Preliminary heat load tests indicated grain refinement PM-W with high purity and W-K alloy have good crack resistance to transient thermal shocks, while brazed W/CuCrZr and monoblock W/CuCrZr mockups can withstand 1000 cycles under 6-8 MW/m 2 stable heat flux.
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