堆外核探测器中子灵敏度计算模型研究  

Study on Neutron Sensitivity Calculation Model of Ex-core Neutron Detector

作　　者：刘耀隆 陈智[1,2] 黄有骏 林超 高志宇 罗庭芳[1] Liu Yaolong;Chen Zhi;Huang Youjun;Lin Chao;Gao Zhiyu;Luo Tingfang(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,China;University of South China,Hengyang,Hunan,421200,China)

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610213 [2]南华大学,湖南衡阳421200

出　　处：《核动力工程》2024年第3期272-278,共7页Nuclear Power Engineering

摘　　要：本研究以蒙特卡罗方法为基础,提出了一种中子灵敏度计算模型,用于堆外核探测器核性能设计研究。首先,基于探测器物理原理,得到中子灵敏度的影响因素;在此基础上,分析探测器孔道处中子场特性,提出中子灵敏度计算模型;对计算模型进行讨论得到其不确定度分析。最后对模型展开验证,结果表明计算得到的中子灵敏度与实测数据的误差在可接受范围内,验证了模型的可行性。Based on the Monte Carlo method,this thesis proposes a neutron sensitivity calculation model for the design and study of the performance of ex-core neutron detectors.Firstly,based on the physical principle of the detector,the influencing factors of neutron sensitivity are obtained.On this basis,the neutron field characteristics at the monitor holes are analyzed,and the neutron sensitivity calculation model is proposed.The calculation model is discussed to obtain the uncertainty analysis of the model.Finally,the model is verified,and the error between the calculated neutron sensitivity and the measured data is within the acceptable range,which verifies the feasibility of the model.

关 键 词：蒙特卡罗方法 堆外核探测器 中子灵敏度 不确定度分析 

分 类 号：TL816.3[核科学技术—核技术及应用]