Geant4模拟计算自给能探测器燃耗  

Geant4 Simulates the Burnup of the Self-Powered Neutron Detector

作　　者：鄢小兰 张庆贤[1] 辜峙钘 张建[1] 陈弘杰 YAN Xiao-lan;ZHANG Qing-xian;GU Zhi-xing;ZHANG Jian;CHEN Hong-jie(College of Nuclear Technology and Automation Engineering,Chengdu University of Technology,Chengdu 610059,China;Nuclear Power Institute of China,Chengdu 610213,China)

机构地区：[1]成都理工大学地学核技术重点实验室,成都610059 [2]中国核动力研究设计院,成都610213

出　　处：《核电子学与探测技术》2021年第2期258-263,共6页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金(41774190)资助。

摘　　要：针对铑自给能探测器(Rh-SPND)的燃耗问题,基于Geant4平台开展了自给能探测器燃耗计算与分析。研究结果表明:自给能探测器灵敏度与中子反应截面密切相关,共振吸收作用对灵敏度影响明显;Rh-SPND的燃耗表现出不均匀性,外层燃耗可达内层燃耗1.71倍;随着中子注量的增加,Rh-SPND的灵敏度呈非线性减小。通过模拟给出了反应堆灵敏度与累积电荷之间的关系式,该关系式可用于Rh-SPND的灵敏度校正。Aiming at the burnup problem of rhodium self-powered neutron detector(Rh-SPND),the burnup calculation and analysis of Rh-SPND are based on Geant4 platform.The results show that the sensitivity of Rh-SPND is closely related to the neutron reaction cross section,and the resonance absorption has a significant influence on the sensitivity.The burnup of Rh-SPND is not uniform,and the burnup of outer layer can reach 1.71 times of inner layer.With the increase of neutron flux,the sensitivity of Rh-SPND decreases nonlinearly.The relationship between reactor sensitivity and accumulated charge is given through simulation,which can be used for Rh-SPND sensitivity correction.

关 键 词：自给能探测器 能谱 燃耗 灵敏度 

分 类 号：TL816[核科学技术—核技术及应用]