Effect of water vapor on tritium permeation behavior in the blanket system
Effect of water vapor on tritium permeation behavior in the blanket system
复制标题
水蒸气对包层系统中氚渗透行为的影响
DOI：
10.1016/j.fusengdes.2012.01.012
复制
发表时间：
2012
影响因子：
1.7
通讯作者：
M. Nishikawa
中科院分区：
文献类型：
--
作者：
H. Yamasaki;H. Kashimura;Shohei Matsuda;T. Kanazawa;T. Hanada;K. Katayama;S. Fukada;M. Nishikawa
研究发现，在包层操作的早期阶段，由于水的生成反应，提供给包层气体的大部分氢气变成了水蒸气，如果不对固体增殖材料进行前处理，当包层温度高于几百度K时，物理或化学吸附的水以高浓度的形式释放到包层气体中。讨论了放气中水蒸气的共存对氢在孕育部分的F82H铁素体钢和回收部分的钯-银(Pd-Ag)的渗透行为的影响，因为通常认为利用它们来从固体包层中回收培养的氚。在本研究中，当包层吹扫气体中存在水蒸气时，F82H的渗透率几乎没有下降。当包层吹扫气体中存在水蒸气时，氢同位素在Pd-Ag管中的渗透率逐渐降低。在这项研究中，通过实验获得了估算渗透到吹扫气体中的氢气所需的性质。
It is found that most hydrogen supplied to the purge gas changed to water vapor due to the water formation reaction in the early stage of the blanket operation and that physical or chemical adsorbed water is released in the high concentration into the blanket purge gas when the blanket temperature becomes higher than several hundreds of degrees K if the pre-treatment is not applied to the solid breeder materials. Effect of coexistence of water vapor in the purge gas on permeation behavior of hydrogen through F82H ferritic steel in the breeding part and palladium–silver (Pd–Ag) in the recovery part is discussed because use of them is generally considered for recovery of bred tritium from the solid blanket. Almost no decrease in permeation rate of F82H is observed in this study when water vapor exists in the blanket purge gas. The permeability of hydrogen isotopes through the Pd–Ag pipe gradually decreases when water vapor exists in the blanket purge gas. Properties required in estimation of the hydrogen permeated to the purge gas are experimentally obtained in this study.