High Heat Flux Test with 80x80x1 Be/Cu/SS Mock-ups for the ITER Blanket First Wall

The first wall (FW) of the International Thermonuclear Experimental Reactor (ITER) is an important component which faces the plasma directly and therefore, it is subjected to high heat and neutron loads. The FW is composed of a beryllium (Be) layer as a plasma facing material, a copper alloy (CuCrZr) layer as a heat sink and type 316L authentic stainless steel (SS316L) as a structure material. To fabricate the FW, the Hot Isostatic Pressing (HIP) bonding method has been investigated. Surface heat flux of the FW is about 0.3 MW/m2 and the volumetric heating in the FW is in the order of 15-20 MW/m3 due to a neutron wall loading. To investigate the thermo-mechanical performance of the FW, including the integrity of the HIP bonded interfaces, high heat flux (HHF) tests are essential. This work has three steps; Cu/SS mock-ups test at JEBIS (JAEA electron beam irradiation stand), Be/Cu mock-ups test in the TSEFEY-M facility (Russia), and Be/Cu/SS mock-ups test in JUDITH-1 (Germany). Some test results such as for the Cu/SS mock-ups and 50x50x1 Be/Cu mock-ups have already been introduced and other tests are being prepared through a preliminary analysis to determine the test conditions and mock-ups are being designed and fabricated. In the present study, the test procedure and results are introduced for the 80x80x1 Be/Cu/SS mock-ups tested with the JUDITH-1 at FZJ in Germany among them