【作者】 屈国普； 赵越； 周剑良； 齐路兵；

【Author】 Qu Guo-pu;Zhao Yue;Zhou Jian-ling;Qi Lu-bing;School of Nuclear Science and Technology, University of South China;

【机构】 南华大学核科学技术学院；

【摘要】 为了解决现有监测仪器的探测下限较高以及对能谱稳定要求较高的问题,提出了一种利用γ-γ能谱符合法来监测压水堆一回路压力边界水泄漏的方法。该研究以常规取样容器M-B为基础,对符合法测量取样容器进行了初步设计,并利用Geant4软件对β+粒子在取样容器中的行为和符合探测器的效率进行了模拟和计算。计算结果表明,相同取样体积下,方案一的符合效率和计数率均高于方案二,这给我们实际构建更优化的监测装置提供了理论依据。更多还原

【Abstract】 To solve the higher detection limit of the existing instruments and the higher requirements of stability of energy spectrum, a use of the energy spectrum of the γ-γ coincidence method to monitor water leaks in PWR primary circuit pressure boundary is proposed.In this study, coincidence measurement sampling container were preliminary designed based on the conventional sampling container M-B, and the behavior of β + particles in the sample container and efficiency of the coincidence detector were simulated and calculated by using Geant4 software The calculated results reveal that, when the same sampling volume, the coincidence detection efficiency and counting rate of the coincidence detectors with program one are higher than program two, this provides a theoretical basis for us to construct more optimized monitoring device in practical work.更多还原