Development of fabrication and qualification methods for the first wall of the International Thermonuclear Experimental Reactor

In order to investigate the manufacturing and qualification methods for the first wall (FW) of the International Thermonuclear Experimental Reactor (ITER), we fabricated several mock-ups with various shapes through the hot isostatic pressing (HIP) bonding method for joining the Cu-alloy with Be armor and the Cu-alloy with stainless steel (SS). Non-destructive test (NDT) methods currently being developed for the ITER FW were applied to these mock-ups to find the defects. Ultrasonic test (UT) showed that a probe of 10 MHz and 0.25 inch in diameter could detect defects up to 3 mm. in diameter. The eddy current test (ECT) for the SS tube was simulated with a numerical code and showed the feasibility of detecting defects in the SS tube. Thermography was simulated with a numerical code, CFX-10, and preliminary tests were performed. Also, a high heat flux (HHF) test was performed up to 1000 cycles at 5.0 MW/m(2) for the Cu/SS mock-up in Japan (JEBIS, JAEA Electron Beam Irradiation Stand), and it is being prepared for the Be/Cu mock-up in Russia.