[2L04-07] Tritium Breeding Materials/Neutron-Multiplier Materials

[2L04] Preparation of Li₂TiO₃-0.5Li₄SiO₄-Pb lithium ceramic and its hydrogen isotope release behavior

*Qilai Zhou^1,2, Asahi Sanfukuji¹, Yasuhisa Oya¹ (1. Shizuoka Univ., 2. Wuhan Univ. of Technol.)

Keywords:Tritium breeder, Tritium, Deterium, Lithium ceramic, Neutron irradiation

Li₂TiO₃-0.5Li₄SiO₄-Pb was prepared by the addition of lead (Pb) into lithium ceramic as tritium breeder candidate for fusion reactors. The ceramics with and without Pb were irradiated by neutrons in KUR. The tritium release behavior was compared using the tritium thermal desorption spectroscopy system (T-TDS). It was found that the tritium release rate at the low temperature side was increased by Pb addition. For the tritiated water (HTO), 80 % can be released when the isothermal heating temperature was 683 K. For the HT, almost 100 % can be released when the heating temperature was 814 K. 3 keV D₂⁺ irradiation and subsequent TDS measurements showed that D₂ desorption of Li₂TiO₃-0.5Li₄SiO₄-Pb was higher and HDO water desorption was lower.