[1L07-14] Blanket Material

[1L10] Tritium recovery behavior for tritium breeder Li₄SiO₄–Li₂TiO₃ mixture material

*Shiori Hirata¹, Kyosuke Ashizawa¹, Yuki Koyama¹, Fei Sun², Qilai Zhou³, Makoto I Kobayashi⁴, Yasuhisa Oya¹ (1. Grad. Sch., of Shizuoka Univ., 2. Hefei University of Technology, 3. Wuhan University of Technology, 4. NIFS)

Keywords:Mixture ceramics, Tritium behavior, blanket

In the blanket, tritium is produced by neutron reaction with lithium. Li₂TiO₃ and Li₄SiO₄ are regarded as the promising candidates for solid breeder materials due to higher lithium density and easy recovery. In this study, Li₄SiO₄-Li₂TiO₃ mixture materials with various phase ratios were prepared and their tritium desorption behavior was studied by T (tritium)-TDS.
The neutron irradiation was performed for two kinds of samples with different phase ratios, Li₄SiO₄-Li₂TiO₃ and Li₄SiO₄-2Li₂TiO₃. Thereafter, the TDS measurement was conducted from R.T. to 1113 K with the heating rates of 5 – 20 K min^-1. The activation energy of tritium desorption from Li₄SiO₄-2Li₂TiO₃ was evaluated and it was lower than that of Li₄SiO₄-Li₂TiO₃. The effect of phase ratio will be discussed in the presentation.