A study of tritium decontamination of deposits by UV irradiation
A study of tritium decontamination of deposits by UV irradiation
复制标题
紫外辐照氚去沉积物污染的研究
DOI：
10.1016/s0022-3115(00)00440-2
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发表时间：
2001
影响因子：
3.1
通讯作者：
M. Nishi
中科院分区：
文献类型：
--
作者：
Y. Oya;W. Shu;S. O’hira;T. Hayashi;H. Nakamura;T. Sakai;T. Tadokoro;Kazuhiro Kobayashi;T. Suzuki;M. Nishi
为了开发一种新的氚去污方法，利用紫外光源对D-T聚变堆碳纤维复合材料（CFC）瓦等部件进行了初步的氚去污实验。使用C2 H2和钨或CFC基底通过辉光放电制备模拟共沉积层的样品。在423 K下，用氙准分子灯（172 nm）的紫外光照射样品。只有在加热到423 K时才释放出少量的物种。通过紫外光照射，从样品中释放出大量的氢、碳和碳氢化合物。傅立叶变换红外光谱分析表明，乙炔辉光放电在样品表面生成了碳氢化合物，紫外光照射使C-H键分解。得出的结论是，加热和紫外线照射的组合导致从材料的表面释放的氚。
To develop a new method for decontamination of tritium retained in the carbon fiber composites (CFC) tiles and other components of D–T fusion reactors, a preliminary experiment using ultra violet (UV) light source was performed. Samples simulating a co-deposited layer were prepared by glow discharge using C2H2and a tungsten or CFC substrate. The UV light from a xenon excimer lump (172 nm) was irradiated to the samples in 423 K. Small amounts of species were released only by the heating procedure to 423 K. By UV irradiation, large quantities of hydrogen, carbon and hydrocarbons were released from the samples. Fourier Transform Infrared (FT-IR) analysis showed hydrocarbons were formed on the sample by acetylene glow discharge and C–H bonds were decomposed by irradiation with UV light. It is concluded that the combination of heating and UV irradiation causes release of tritium from the surface of the materials.