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研究了贮存氚靶约4 a和20 a的两个316 L不锈钢真空贮存容器(以下简称贮存容器)及其垫片材料对氚的吸附行为,并对氚在贮存容器材料中的渗透速率进行了测量和分析。结果表明,贮存容器外表面氚污染为几十Bq/cm2,不锈钢与陶瓷中吸附的氚活度均为106Bq/g;热解吸至1 273 K过程中,材料中99%的氚释放出来;在解吸出的氚中,陶瓷中的HTO比例高于不锈钢;贮存温度对氚靶贮存容器的渗氚速率有较大影响,夏季约为冬季的4倍。上述结果提示,氚在贮存容器材料内表面吸附后,一部分会向晶格扩散并滞留下来;另一部分则透过材料向外环境渗透,其中温度是影响氚向外环境渗透的主要因素之一。
The adsorption behavior of tritium on two 316L stainless steel vacuum storage containers (hereinafter referred to as storage containers) and their gasket materials for storage of tritium targets of about 4 and 20 years was studied. The permeation rate of tritium in storage container materials Measurement and analysis. The results show that the tritium contamination on the outer surface of the storage container is several tens of Bq / cm2, the activity of tritium adsorbed on both stainless steel and ceramic is 106Bq / g, and 99% of the tritium is released during the process of thermal desorption to 2773K; Among the desorbed tritium, the proportion of HTO in the ceramic is higher than that of the stainless steel. The storage temperature has a great influence on the trituration rate of the tritium target storage container, which is about four times of that in winter. The above results suggest that part of the tritium diffuses and remains in the lattice when it is adsorbed on the inner surface of the storage container material, while the other part permeates through the material to the outer environment, of which temperature is one of the main factors that affect the infiltration of tritium into the outer environment.