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

[2L03] Hydogen isotope mixed plasma driven permeation for neutron damaged tungsten

*Yasuhisa Oya¹, Ashizawa Kyosuke¹, Shiori Hirata¹, Naoko Ashikawa², Yoji Someya³, Yuji Hatano⁴, Masashi Shimada⁵, Chase N. Taylor⁵, Robert Kolasinski⁶ (1. Shizuoka University, 2. NIFS, 3. QST, 4. University of Toyama, 5. INL, 6. SNL)

Keywords:Tungsten, Hydrogen isotope, PDP, Neutron irradiation

H and D mixed plasma driven permeation behavior for neutorn damaged tungsten(W) was studied at PDP device in Shizuoka University. The H and D retentions for undamaged or damgaed W after PDP experiment was also evaluated by TDS. It was found that H and D permeation flux was increased at the temperature less than 800 K for neutron damaged W. H/D permeation ratio for undamaged W was increased at the temperature less than 850 K, but that for neutron damaged W was almost constant. It was indicatd that H and D permeation behavior is influenced by the introduction of irradiation damages.