Atomic Energy Society of Japan

In the fusion reactor, energy is obtained using a fusion reaction of deuterium (D) and tritium (T). Tungsten (W) is one of the candidates for plasma facing materials (PMFs) in the fusion reactors due to its higher melting point and lower sputtering yield. W will be exposed to high flux D and T including helium (He) ash during the operation. In addition, 14MeV neutron, that produced by nuclear fusion reaction of D and T, will be irradiated into W, leading to the transmutation of Re in W. Therefore, the evaluation of hydrogen isotope permeation behavior for W-Re alloy are important. In the presentation, we will discuss the hydrogen isotope effect of W-10%Re by HD mixed plasma.