[2L08-12] Structural Materials for Nuclear Fusion Reactors 1

[2L09] Effects of irradiation defects on HD mixed plasma driven permeation for tungsten-rhenium alloy

*Yuzuka Hoshino¹, Naoko Ashikawa^2,3, Tatsuya Hinoki⁴, Kiyohiro Yabuuti⁴, Yasuhisa Oya¹ (1. Shizuoka Univ., 2. NIFS, 3. SOKENDAI, 4. Kyoto Univ.)

Keywords:Tungsten, Rhenium, HD mixed plasma irradiation

In the fusion reactor, energy is obtained using a fusion reaction of deuterium (D) and tritium (T). Tungsten (W) is one of the candidates material for plasma facing components (PFMs) in the fusion reactors. 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. It was suggested that formation of He bubbles by He⁺+ Fe³⁺ irradiation would work as a diffusion barrier from HD plasma permeation fluxes and calculated diffusion coefficients.