Tritium recovery from molten LiF-BeF2 salt
Tritium recovery from molten LiF-BeF2 salt
复制标题
DOI：
10.1016/s0920-3796(89)80124-3
复制
发表时间：
1989
影响因子：
1.7
通讯作者：
J. Oishi;H. Moriyama;S. Maeda;Y. Asaoka
中科院分区：
文献类型：
--
作者：
J. Oishi;H. Moriyama;S. Maeda;Y. Asaoka
为了支持氚回收工艺的发展，研究了氚从熔融LiF-BeF 2混合物（称为flibe）中的释放行为。吹扫气中的可冷凝氚组分归因于TF，不可冷凝组分归因于HT。通过考虑系统中的传质和化学反应，分析了各组分的等温释放。结果表明，TF在气液界面的传质系数远低于HT。作为比较，用毛细管法测量了氚在熔融膜中的扩散系数，并估计界面处的有效膜厚约为1 mm。在H2存在下，TF与H2发生了同位素交换反应，产生了HT。不锈钢成分对TF的减少可能是HT额外产生的原因。
The release behavior of tritium from a molten LiF-BeF2mixture, called flibe, was studied in support of the development of a tritium recovery process. The condensable tritium component in the sweep gas was attributed to TF and the non-condensable component to HT. The isothermal release of each component was analyzed by taking into account the mass transfers and the chemical reactions in the system. It was found that the mass transfer coefficient of TF at the gas-liquid interface was much lower than that of HT. For comparison, the diffusion coefficient of tritium in a molten flibe was measured by a capillary method, and the effective film at the interface was estimated to be ~1 mm thick. The isotopic exchange reaction of TF with H2was confirmed to occur in the presence of H2, resulting in the HT production. The reduction of TF by the constituents of stainless steel might be responsible for additional production of HT.