摘要
压水堆核电厂沉积源项在线监测是指通过多套在线监测设备在多点位开展管外无损就地γ谱在线监测,国内外相关研究仍处于起步阶段。由于在线监测设备数量有限,需要确定在线监测的具体点位。本研究首先参考法国、美国和中国的源项调查经验,研究了重点关注点位为RCP各环路的管道以及RRA、RCV重要设备的上下游管道;然后通过剂量率贡献和管道内壁沉积活度占比分析,确定了压水堆最主要的沉积源项核素是Co-60和Co-58;在此基础上提出了确定压水堆沉积源项在线监测布点位置的方法,建议在满足在线监测装置安装要求的前提下,优先监测Co-60与Co-58沉积量最多的点位。本研究为压水堆机组开展沉积源项在线监测提供了参考和指导。
On-line monitoring of sedimentary source terms(SSTs)is to monitor the source term activity at multiple locations using on-line measurement devices,the study of which is still lacking.There are many optional on-line monitoring locations,while the number of on-line measurement devices is limited.It is necessary to determine the specific locations when conducting on-line monitoring of SSTs.The experience of France,the United States and China in conducting SSTs surveys were reviewed for reference.The key locations are mainly in RCP,RRA,and RCV systems.Then the contribution of different nuclides to dose rate and inner surface activity were analyzed.The results indicate that the most important SST radionuclides for PWRs are Co-60 and Co-58.A method is proposed to determine the locations of on-line monitoring for SSTs in PWRs.It is suggested that the locations with the most deposited Co-60 and Co-58 should be monitored preferentially.This study provides support for on-line monitoring of SSTs in PWRs.
作者
李富海
田朝晖
林根仙
孙云
刘灿帅
方军
Li Fuhai;Tian Zhaohui;Lin Genxian;Sun Yun;Liu Canshuai;Fang Jun(Suzhou Nuclear Power Research Institute,Suzhou of Jiangsu Prov.215008,China;National Nuclear Power Plant Safety and Reliability Engineering Technology Research Center,Suzhou of Jiangsu Prov.215008,China)
出处
《核安全》
2025年第4期92-100,共9页
Nuclear Safety
基金
江苏省青年基金项目,项目编号:BK20220257。
关键词
压水堆
沉积源项
在线监测
布点
PWR
sedimentary source terms
on-line monitoring
locations
