Li Gang, Liang Manchun, He Shuijun, Liu Jiacheng, Pang Xinxin, Zeng Zhengkui
Department of Engineering Physics, Tsinghua University, Beijing, 100084, China; CNNC High Energy Equipment (Tianjin) Co., Ltd., Tianjin, 300399, China.
Department of Engineering Physics, Tsinghua University, Beijing, 100084, China.
Appl Radiat Isot. 2020 Dec;166:109343. doi: 10.1016/j.apradiso.2020.109343. Epub 2020 Jul 24.
Tritium analysis in water is an important part of environmental radiation monitoring. At present, tritium in water is generally measured by liquid scintillation counting (LSC). To optimize the pretreatment process and improve the efficiency of tritium analysis via LSC, a pretreatment device for tritium analysis in water based on a reverse osmosis (RO) film was developed. This paper introduces the system composition and carries out the following experimental studies: First, the comprehensive performance of the device was studied by performing repeated analyses, and the pretreatment time can be reduced by approximately 77% compared with that of the traditional method; then, the device was used to process tritium samples with different concentrations to verify the negligible impact of any tritium residue in the RO film; finally, the reliability of the results is verified by comparing with the traditional atmospheric distillation pretreatment method under the same measurement conditions. The results showed the developed method has the advantages of a simple operation and a high degree of automation, which effectively improves the efficiency of tritium analysis in water.
水中氚分析是环境辐射监测的重要组成部分。目前，水中氚一般采用液体闪烁计数法（LSC）进行测量。为优化预处理过程并提高通过LSC进行氚分析的效率，研制了一种基于反渗透（RO）膜的水中氚分析预处理装置。本文介绍了系统组成并开展了以下实验研究：首先，通过重复分析研究了该装置的综合性能，与传统方法相比，预处理时间可减少约77%；然后，用该装置处理不同浓度的氚样品，以验证RO膜中任何氚残留的影响可忽略不计；最后，在相同测量条件下与传统常压蒸馏预处理方法进行比较，验证结果的可靠性。结果表明，所开发的方法具有操作简单、自动化程度高的优点，有效提高了水中氚分析的效率。
