ITER first wall fabrication technology in China

China has done R&Ds on the fabrication technology for ITER first wall (FW). The FW materials, such as the vacuum-hot-pressing (VHP) Be and ITER-grade CuCrZr alloys, have been developed in China. The Be plate showed good physical and mechanical properties, similar to S65C. The effect of fabrication process on mechanical strength of CuCrZr alloy was studied. Several FW qualification (FWQ) mock-ups have been fabricated and tested. Good bonding quality has been achieved between Be, CuCrZr and SS. The RT shear strength of Be/Cu joint has reached up to 244MPa, and no defects of larger than 2 mm in diameter was observed at Be/Cu interface. A high heat flux test (HHFT) of the mock-up shows that the mock-up survived 500 cycles at 1.47 MW/m and a number of cycles at higher power density up to 2.47 MW/m without significant damage.