[2C14-18] Behaviors of Hydrogen Isotopes in Fusion Materials

[2C14] Removal of retained tritium retained in tungsten-carbon mixed material deposits by deuterium gas exposure

*Akihiro Togari¹, Keisuke Azuma¹, Qilai Zhou², Yuji Hatano³, Miyuki Yajima⁴, Masayuki Tokitani⁴, Suguru Masuzaki⁴, Takumi Chikada⁵, Yasuhisa Oya⁵ (1. Grad. School of Sci. and Tech. Shizuoka Univ., 2. Fac. of Sci. Shizuoka Univ., 3. HRC, Univ. of Toyama, 4. NIFS, 5. Dept. of Sci, Shizuoka Univ.)

Keywords:Tungsten, Tritium retention, Deuterium exposure, Hydrogen isotope exchange

Hydrogen isotope exchange is suggested as a retained tritium removal method. In this study, tritium and deuterium gas exposure for W-deposited C-W mixture layer was performed at various temperatures and pressures. After that, thermal desorption spectroscopy measurement was performed to evaluate the retention behavior of each hydrogen isotope and tritium removal effect.