Simulation results of the online tritiated water measurement system

• 作者: Rui-Yang Xu Chun-Hui Dong Xiao-Qing Mao Qing-Xian Zhang Hui Gong Kai-yong Liao Zhi-Gang Lu Liang-quan Ge Zhi-Yu Gao Ting-Fang Luo Qi-Chang Huang
• 来源期刊: 核技术（英文版）
• 年，卷（期）: 2021,（11）
• 所属期刊栏目: NUCLEAR ELECTRONICS AND INSTRUMENTATION
• 页码范围: 80-88
• 页数: 9页
• 语种: 英文

摘要

Currently,the liquid scintillation method is widely used to measure the activity of tritiated water in the primary circuit of nuclear power plants,which leads to the continuous production of radioactive waste during mea-surement.In addition,the real-time activity information of tritiated water cannot be obtained.To solve this problem,herein we present an online tritiated water measurement method based on plastic scintillators that used the optical transport process in the Geant 4 software toolkit to build a model of plastic scintillation detection for tritiated water.Through simulation,the basic geometric dimensions of the detector were determined.In this dimension,using one detector to measure for 3 h,when the tritiated water activity was 100 Bq/L,its resolution was 16％(16 Bq/L).In addition,calculations were performed for the presence of other background signals to obtain the minimum detectable concentration.