辐射防护通讯 ›› 2025, Vol. 45 ›› Issue (1): 28-33.

• 经验交流 • 上一篇    下一篇

某核电厂区域辐射监测一次气态源项异常的分析

张敬之, 吴志锋, 王亮   

  1. 辽宁红沿河核电有限公司,辽宁 大连 116001
  • 收稿日期:2024-10-25 出版日期:2025-02-20 发布日期:2025-03-03
  • 作者简介:张敬之(1988—),男,2016年毕业于南昌航空大学机械设计及其自动化专业,工程师。E-mail:339175259@qq.com

Analysis of abnormal gas source term in area radiation monitoring in a nuclear power plant

ZHANG Jingzhi, WU Zhifeng, WANG Liang   

  1. Liaoning Hongyanhe Nuclear Power Co.,Liaoning Dalian 116001
  • Received:2024-10-25 Online:2025-02-20 Published:2025-03-03

摘要: KRT036MA为扫描式放射性气体活度浓度监测的通道,主要用于主控制区通风管线内的放射性监测。某核电厂运行时,KRT036MA第4支路示数产生了一次上涨,为了确保现场的辐射安全,通过现场核实发现为真实上涨。本文通过DVN系统分析、现场工作调研、工作过程模拟、时间比对、源项比对等方案,最终确定此次异常上涨的原因为取样操作导致放射性气体残留释放所致,通过优化取样操作流程等措施,保证了现场人员工作环境的辐射安全。

关键词: 核电厂, 辐射监测, 放射性

Abstract: The KRT0036MA is the channel for monitoring radioactive gas activity concentration, mainly used for radioactive monitoring in the ventilation pipeline of the main control area in nuclear power plant. During operation, the 4th branch activity rised and was confirmed as real radiation level increase. This study analyzed the DVN system (NX ventilation system) layout, on-site operation and maintenance time line, working process and source term comparison, and identified the cause of the activity increase. By optimizing the sampling operation process and other measures, the radiation safety of the working environment for on-site personnel has been ensured.

Key words: nuclear power plant, radiation monitoring, radiation activity