[2L01-04] Plasma-material Interaction in Fusion Reactors

[2L04] Effects of rhenium and chromium addition on radiation tolerance and hydrogen isotope retention of tungsten

*Yuji Hatano¹, Jing Wang¹, Takeshi Toyama², Yuji Nobuta⁴, Yasuhisa Oya⁵, Tatsuya Hinoki³ (1. Univ. of Toyama, 2. Tohoku Univ., 3. Kyoto Univ., 4. Hokkaido Univ., 5. Shizuoka Univ.)

Keywords:Plasma facing material, Tritium inventory, Neutron irradiation, Trapping effect

Addition of Re or Cr into W resulted in signifiant reduction in the density of vacancy-type defects and hydrogen isotope retention after irradiation of 6.4 MeV Fe ions at elevated temperatures. Such beneficial effects of Re addition was also confirmed for neutron irradiation.