M310核电机组BOSS焊缝作业辐射防护控制

BOSS焊缝为管道与支管管座的连接焊缝,核电厂放射性系统管道BOSS焊缝处进行分支与变径导致容易沉积高辐射水平粒子,另由于检修空间有限,其相关作业具有很高的辐射风险。文章结合BOSS焊缝作业主要步骤,分析了作业过程存在的外照射风险与放射性污染风险,并根据各辐射风险提出切实可行的辐射防护措施。作业过程中的经验反馈和实践,为M310核电机组BOSS焊缝作业的辐射防护控制提供参考。

Radiation protection control for maintenance of BOSSweld of M310 nuclear power unit

BOSS weld is the joint weld between pipeline and branch pipe base.The branching and diameter change at BOSS weld position in radioactive system pipeline of nuclear power plant will likely result in the deposition of high radioactive particles.In addition,due to the limited maintenance space,its related operations have a high radiation risk.Based on the main steps of BOSS weld maintenance,this paper analyzed the external radiation and radioactive contamination risks during the operation process,introduced practical and feasible measures for radiation protection,as well as maintenance experience feedback and good practice during the process,which will provide reference for radiation protection control of BOSS weld maintenance of M310 nuclear unit.