Diffusion coefficient of tritium in molten lithium-lead alloy (Li17Pb83) under neutron irradiation at elevated temperatures
Diffusion coefficient of tritium in molten lithium-lead alloy (Li17Pb83) under neutron irradiation at elevated temperatures
复制标题
高温中子辐照下熔融锂铅合金（Li17Pb83）中氚的扩散系数
DOI：
10.1016/0022-3115(92)90504-e
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发表时间：
1992
影响因子：
3.1
通讯作者：
Yoichi Takahashi
中科院分区：
文献类型：
--
作者：
T. Terai;S. Nagai;T. Yoneoka;Yoichi Takahashi
氚在熔融 Li17Pb83 合金中的扩散系数是在 300-700°C 的中子辐照下测定的。氚在实验系统中的停留时间随着He吹扫气中的H2压力增加至1000 Pa而减少，并且在该极限浓度以上，氚的停留时间变得恒定。这一结果表明，在PH2= 1000 Pa以上的熔融Li17Pb83合金样品和Fe样品架中，氚释放速率仅受氚扩散过程控制。根据PH2= 3000 Pa时获得的氚停留时间数据，确定氚的扩散系数如下： D/m2s−1= 2.50 × 10−7exp(−27.0kJmol−1/RT)，略大于其他文献值。
The diffusion coefficient of tritium in molten Li17Pb83alloy was determined under neutron irradiation at 300–700°C. Tritium residence time in the experimental system decreased with increasing H2pressure in He sweep gas up to 1000 Pa, and above this limiting concentration it became constant. This result suggests that the tritium release rate was controlled only by the tritium diffusion processes in the molten Li17Pb83alloy sample and in the Fe sample holder abovePH2= 1000 Pa. From the data on tritium residence time obtained inPH2= 3000 Pa, the diffusion coefficient of tritium was determined as follows:D/m2s−1= 2.50 × 10−7exp(−27.0kJmol−1/RT), which was slightly larger than the other literature values.