Tritium release from lithium silicate pebbles produced from lithium hydroxide
Tritium release from lithium silicate pebbles produced from lithium hydroxide
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DOI：
10.1016/j.fusengdes.2008.05.039
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发表时间：
2008-12
影响因子：
1.7
通讯作者：
K. Munakata;T. Shinozaki;Keita Inoue;Shunsaku Kajii;Yohei Shinozaki;R. Knitter;N. Bekris;T. Fujii;H. Yamana;K. Okuno
中科院分区：
文献类型：
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作者：
K. Munakata;T. Shinozaki;Keita Inoue;Shunsaku Kajii;Yohei Shinozaki;R. Knitter;N. Bekris;T. Fujii;H. Yamana;K. Okuno
堆外氚释放实验是用稍微超化学计量量的正硅酸锂鹅卵石在研究反应堆中辐照进行的。实验采用纯氮气、氢气/氮气和水蒸气/氮气等多种扫气，研究不同扫气成分对增殖材料氚释放的影响。实验结果表明，无论扫气组分的不同，氚几乎全部以氚化水蒸气的形式释放。即使用氢气/氮气作为扫气，释放的氚的大部分化学形式也是氚化的水蒸气。研究还发现，当使用纯氮气作为扫气时，氚的释放量要少得多。实验结果的对比表明，当扫气中含有水蒸气时，氚的释放速率大大提高。
Out-of-pile tritium release experiments were performed using slightly overstoichiometric lithium orthosilicate pebbles irradiated in a research reactor. In the experiments, various sweep gases such as pure nitrogen gas, hydrogen/nitrogen gas and water vapor/nitrogen gas are used to investigate the effect of difference in sweep gas composition on tritium release form the breeder material. The experimental results indicate that almost all tritium was released as tritiated water vapor regardless of difference in gas composition of the sweep gas. Most of the chemical form of tritium released was tritiated water vapor even when the hydrogen/nitrogen gas was used for the sweep gas. It was also found that a considerably smaller amount of tritium was released when a pure nitrogen gas was used as the sweep gas. Comparison of the experimental results reveals that the tritium release rate is substantially enhanced if the sweep gas contains water vapor.