控制棒运动对反应堆功率探测器的影响机理研究  

Study on the Influence of Reactor Control Rods Movement for Power Monitoring Detector

作　　者：万波 黎刚 李昆[1] 杨戴博[1] 李丹 熊帮平 Wan Bo;Li Gang;Li Kun;Yang Daibo;Li Dan;Xiong Bangping(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,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

出　　处：《仪器仪表用户》2022年第6期75-78,共4页Instrumentation

摘　　要：为研究控制棒运动过程中子探测器对空间效应的响应机理,以KUCA临界装置为对象开展研究,模拟计算了控制棒插入前后探测器中子响应函数和堆芯中子通量密度分布形状函数的变化规律。模拟研究表明控制棒附近区域中子响应函数和形状函数变化最显著,且两者变化趋势一致。提出了通过空间修正因子消除空间效应的方法,研究结果对于提升反应堆功率监测的精度具有重要意义。In order to research the relationship between neutron detectors and the spatial effect during control rods movement,critical assembly KUCA was selected as the object for this study,and the variation of neutron detector response function and shape function of neutron flux distribution before or after the control rod inserted have been calculated.The simulated results shown that the changes of response function and shape function close to control rod are significant,and the trend of these two functions stay the same.The spatial correction factor was introduced to reduce the influence of spatial effect.Research results have important implications for improving the precision of power monitoring.

关 键 词：控制棒 中子响应函数 通量分布形状函数 空间效应 

分 类 号：TL8[核科学技术—核技术及应用]