铑自给能探测器中子灵敏度燃耗修正研究  

Study on Burnup Correction of Neutron Sensitivity of Rhodium Self-powered Detector

作　　者：于稼驷 Yu Jiasi

机构地区：[1]中华人民共和国生态环境部,北京100006

出　　处：《核安全》2024年第5期104-116,共13页Nuclear Safety

摘　　要：本文经理论分析,结合从燃耗实验数据推算出的铑探测器灵敏度K因子[1],以及理论计算灵敏度K因子[2],提出两类四种铑探测器灵敏度燃耗修正方法。燃耗修正不仅考虑热中子作用,还考虑超热共振中子的作用。经过综合分析比较,本文推荐了一个最佳灵敏度燃耗修正公式。本文还提出了一种计算探测器位置中子注量的公式,这为监测堆芯中子注量分布创造了条件。本文分析了灵敏度燃耗修正的限制条件。In this paper,by theoretical analysis,and combining the sensitivity K factor of Rhodium detector calculated from burnup experimental data and its sensitivity K factor from theoretical calculation,four kind methods of two categories for sensitivity burnup correction of Rhodium detectors are proposed.The burnup correction considers not only the effect of thermal neutrons,but also the effect of epi-thermal resonance neutrons.After comprehensive analysis and comparison,this paper suggests to recommend an optimal sensitivity burnup correction formula.This paper also presents a formula for calculating neutron integral flux at the detector location in the core.This provides a good condition for monitoring the integrated neutron flux distribution in the reactor core.In this paper,the limiting conditions for sensitivity burnup correction are analyzed.

关 键 词：自给能 探测器 灵敏度 燃耗修正 

分 类 号：TL375.4[核科学技术—核技术及应用]