[2B05-09] Advanced Fusion Material Technology

10:35 AM - 10:50 AM JST(1:35 AM - 1:50 AM UTC)

[2B05] High temperature oxidation of neutron-irradiated tungsten materials and radioisotope release by oxide sublimation

*Azusa Matsumoto¹, Yuji Hatano^1,2, Teppei Otsuka³, Makoto Kobayashi⁴, Yasuhisa Oya⁵, Masashi Shimada⁶ (1. Univ. of Toyama, 2. Tohoku Univ., 3. Kindai Univ., 4. NIFS, 5. Shizuoka Univ., 6. INL)

Keywords:

Tungsten,Oxidation,Thermogravimetry

As the plasma facing material of fusion reactors, tungsten is irradiated by fuel plasma and energetic neutrons and becomes radioactive due to transmutation and tritium retention. In the event of a loss-of-vacuum accident, tungsten reacts with oxygen gas and/or water vapor and release tritium and activation products as volatile oxides. In the Japan-US FRONTIER program, the apparatus for mass transfer experiment and thermogravimetric analysis have been installed at the Idaho National Laboratory to investigate the oxidation rate of neutron-irradiated tungsten and the release rate of volatile oxides. Experiments will also be carried out for oxidation-resistant tungsten alloy called smart alloy. In this presentation, details of installed experimental apparatus and the initial results will be reported.