摘要
本文提出一种基于NaI(Tl)探测器与BGO探测器进行反符合测量16Nγ散射能谱,以实现对高通量工程试验堆一次水16N比活度在线监测的方案。采用MCNP5程序与GEANT4工具包对16N监测仪测量装置的屏蔽体、过滤器与BGO晶体尺寸优化及16N散射谱测量进行蒙特卡罗模拟,并选择实验测量137Csγ源散射谱进行对比验证。模拟分析表明:在选择合适厚度的铅屏蔽体、锡过滤器以及BGO厚度下可以提高16Nγ谱峰康比。
A scheme which could realize the on-line measurement of specific activity of 16N from main pipe in HFETR was presented based on anti-coincidence measurement of 16N gamma scattering spectrum by NaI(Tl)detector and BGO detector.The optimization of size of shield,filter,BGO crystal and the measurement of 16N gamma scattering spectrum were simulated by MCNP5 and GEANT4 program which was compared and validated with the 137Cs gamma scattering spectrums by measurement.The simulation and analysis showed that the peak-to-Kang ratio of 16N gamma spectrum could be increased by choosing appropriate thickness of shield,filter and BGO.
作者
雷鸣
李松发
邹全
熊飞飞
王博
张彪
LEI Ming;LI Song-fa;ZOU Quan;XIONG Fei-fei;WANG Bo;ZHANG Biao(Nuclear Power Institute of China,Chengdu 610005,China)
出处
《核电子学与探测技术》
CAS
北大核心
2019年第6期682-686,共5页
Nuclear Electronics & Detection Technology
基金
中国核动力研究设计院青年基金(1804BG01)资助。
