次临界反应性测量方法研究  

Study on Measurement Method of Subcritical Reactivity

作　　者：唐霄[1] 肖鹏[1] 刘同先[1] 廖鸿宽 黄灿 赵德华 刘明权 卢迪[1] 李满仓[1] Tang Xiao;Xiao Peng;Liu Tongxian;Liao Hongkuan;Huang Can;Zhao Dehua;Liu Mingquan;Lu Di;Li Mancang(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,China;Hai Nan Nuclear Power Co.,Ltd.,Changjiang,Hai Nan,572733,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]海南核电有限公司,海南昌江572733

出　　处：《核动力工程》2020年第6期214-217,共4页Nuclear Power Engineering

摘　　要：压水堆启动前需要进行物理启动试验,其中调临界是相对耗时的一部分。采用次临界条件下的试验,可以省去调临界的步骤,提高物理启动试验的安全性和适用性,加速物理启动试验的进程,提高压水堆的负荷因子。目前,次临界反应性测量受限于测量信号较弱,背景噪声强,误差较大,难以满足商用压水堆的工程应用要求。本文基于源倍增方法,利用空间重要性修正因子和信号线性修正提高次临界反应性测量的精度,成功地在核电厂首循环上实现了次临界反应性测量的蒙特卡罗方法计算,取得了较好的计算精度与效果。Physical starting test is needed before starting up PWR,and critical adjustment is the relative time-consuming part.The uses of tests under subcritical adjustment step,improve the safety and applicability of physical starting test,and improve the load factor of PWR.However,the measurement method of subcritical reactivity is difficult to be applied to commercial PWR,due to the weak measurement signal,strong background noise and large error.In this paper,the accuracy of subcritical reactivity measurement is improved by using the spatial importance correction factor and signal linear correction method based on the source multiplication method,and the Monte Carlo method of subcritical reactivity measurement is successfully implemented on the first cycle of nuclear power plant,and obtained better calculation accuracy and effect.

关 键 词：次临界反应性测量 源倍增方法 空间重要性修正因子 信号线性修正 

分 类 号：TL32[核科学技术—核技术及应用]