用LaBr_3(Ce)γ谱仪实时监测反应堆回路水放射性  

Real-time Monitoring for Radioactivity of the Reactor Primary Coolant Use LaBr_3(Ce) γ Spectrometer

作　　者：覃国秀[1] 陈细林[1] 代传波 郭晓清[1] 

机构地区：[1]中国原子能科学研究院,北京102413 [2]中船重工第719研究所,武汉430064

出　　处：《核电子学与探测技术》2015年第5期523-526,共4页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金(41174089);江西省高等学校教学改革研究课题(JXJG-13-6-1)资助

摘　　要：为实现用LaBr_3(Ce)γ谱仪实时监测反应堆回路水中裂变产物,对该谱仪系统在裂变产物放射性核素测量中的几个关键问题进行研究。着重研究了裂变核素的选择、高能端效率刻度、符合相加修正、脉冲堆积及谱仪的稳谱等问题。通过实验测试与MC计算相结合方法,获得了初步的解决方案,进一步提高LaBr_3(Ce)探测器在一回路水放射性核素分析、燃料元件破损监测、核事故条件下放射性监测等方面的准确度。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 selection of radionuclides in the fission products,high energy efficiency calibration,coincidence summing correction,pulse pileup and the stabilization of spectrometer were the key concerns. Some preliminary solutions were obtained by the method of experimental tests combined with Monte Carlo calculation. The ongoing solving key problems are important for im- proving the reliability with the LaBr3 （Ce） γspectrometer in the radionuclides analysis of primary coolant, the damage monitoring of fuel element and radionudides monitoring in nuclear accident, et al.

关 键 词：裂变产物 效率刻度 符合相加修正 死时间校正 稳谱 

分 类 号：TL81[核科学技术—核技术及应用]