氚表面污染的快速测量方法  

Rapid Measurement Method for Tritium Surface Contamination

作　　者：刘畅[1] 祝文辉 胡志明 罗雯丹 Liu Chang;Zhu Wenhui;Hu Zhiming;Luo Wendan(China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《山东化工》2023年第3期164-167,共4页Shandong Chemical Industry

摘　　要：氚属于低能纯β放射性核素,很难通过直接测量的方法对氚的表面污染进行监测。本实验通过采用擦拭法间接测量的方式,确定了常见的钢覆面、环氧树脂及聚乙烯类介质的氚表面污染的快速测量方法,结果表明:(1)选择湿巾作为擦拭材料具有较高的擦拭效率;(2)擦拭取样后将取样瓶震荡后15~30 min,湿巾内部的氚可均匀分布在浸出液中;(3)针对钢覆面、环氧树脂地面和聚乙烯三种污染表面,湿巾的擦拭效率分别为:7.11%,4.22%,7.03%。结论:采用湿巾擦拭介质表面的方法,能快速、准确地测量介质表面存在的氚污染水平,可满足辐射监测的要求。Because tritium is a low energy pure beta radionuclide,it is difficult to monitor the surface contamination of tritium by direct measurement.In this experiment,a quick measurement method for tritium surface contamination of common steel cladding,epoxy resin and polyethylene media was determined by means of indirect measurement by wiping method,the results showed that:(1)Selecting wet wipes as the wiping material has a higher wiping efficiency;(2)After wiping and sampling,shake the sampling bottle for 15 to 30 minutes,and the tritium in the wet wipes can be evenly distributed in the leachate;(3)The wiping efficiency of wet wipes is 7.11%,4.22%and 7.03%respectively for the three polluted surfaces of steel cladding,epoxy resin floor and polyethylene.Conclusion:The method of wiping the surface of the medium with wet wipes can quickly and accurately measure the level of tritium pollution on the surface of the medium,which can meet the requirements of radiation monitoring.

关 键 词：氚 表面污染 擦拭法 间接测量 

分 类 号：X837[环境科学与工程—环境工程]