LaBr_3(Ce)γ谱仪在燃料元件破损监测中的应用研究  

Study on the Monitoring for Fuel Rod Failure using LaBr_3(Ce)γ Spectrometer

作　　者：覃国秀 刘玉娟[2] 张怀强[2] 吴和喜[2] 

机构地区：[1]沈阳工程学院,辽宁沈阳110136 [2]东华理工大学,江西南昌330013

出　　处：《核科学与工程》2017年第5期869-873,共5页Nuclear Science and Engineering

基　　金：国家自然科学基金(41174089)

摘　　要：为了实现用LaBr_3(Ce)γ谱仪实时监测压水堆燃料元件的破损,对该谱仪系统在燃料元件破损监测中的几个关键问题进行了研究。通过实验测试与蒙特卡罗(MC)模拟计算,提出了使用LaBr_3(Ce)γ谱仪测量一回路冷却剂中裂变产物^(135)Xe和^(88)Kr的活度浓度来判断燃料元件是否发生破损的方法,并对该方法进行了验证。对某反应堆一回路冷却剂进行测量的结果表明,基于LaBr_3(Ce)γ谱仪的燃料元件破损监测方法可有效避免监测中的干扰因素的影响,降低了定量测量中的不确定度。Several key issues of a LaBr3 （Ce）γ spectrometer system for the measurement of fission products were studied to satisfy the real-time monitoring requirement of primary coolant. The judging method of fuel rod failure by measuring the activity concentrations of ^135 Xe and ^88Kr in the primary coolant using LaBr3 （Ce）γ spectrometer was proposed,and the method was achieved by Monte Carlo simulation and experimental test. The method was verified by measuring the primary coolant of a reactor, it can reduce and eliminate the affecting factors and enhance the efficiency and precision of detecting.

关 键 词：LaBr3(Ce)γ谱仪 燃料元件破损 一回路冷却剂 裂变产物 

分 类 号：TL81[核科学技术—核技术及应用]