Abstract Tritium breeding ceramic materials are placed at high temperatures for a long period in a fusion DEMO reactor. Therefore, the understanding of Li mass loss phenomena and its influence on tritium behavior are important. In this study, the pebbles of Li2TiO3 with excess Li were heated at 900 °C for 30 days in a 1000 Pa H2/Ar flow and tritium sorption and recovery experiments were carried out. Li mass loss by the heating was evaluated to be 0.7 wt%. The value of Li mass loss was almost same as that for 3 days heating at the same condition. Tritium sorption capacity for the heated pebbles at 600 °C and 900 °C were almost same as that for the pebbles as received. Tritium sorbed in the pebbles could not be recovered effectively by the 1000 Pa H2/Ar purge at room temperature and 300 °C but it could be recovered at 600 °C and 900 °C. The influence of the long-time heating on the behavior of tritium sorbed in the pebbles was not large.

中文翻译：

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锂传质对含过量锂的 Li2TiO3 卵石中氚行为的影响

摘要 氚增殖陶瓷材料在聚变DEMO反应堆中长时间放置在高温下。因此，了解锂质量损失现象及其对氚行为的影响很重要。在这项研究中，在 1000 Pa H2/Ar 流中，将含有过量锂的 Li2TiO3 卵石在 900°C 下加热 30 天，并进行了氚吸附和回收实验。加热造成的Li质量损失被评估为0.7wt%。Li质量损失值与相同条件下加热3天的值几乎相同。在 600 °C 和 900 °C 下加热鹅卵石的氚吸附能力与收到的鹅卵石几乎相同。1000 Pa H2/Ar 吹扫在室温和 300 °C 下不能有效回收鹅卵石中吸附的氚，但在 600 °C 和 900 °C 下可以回收。