秦山核电站换料大修期间辐射控制的实践与优化

Dose Control Practice and Optimization during Refueling Outage in Qinshan Nuclear Power Plant

据统计，压水堆核电站换料大修的集体剂量占年集体剂量的80％以上。大修期间高辐射作业项目多，人员集中，辐射风险高。大修集体剂量控制反映了核电站辐射防护管理水平的高低。秦山核电站已经顺利完成了十几次换料大修，通过不断的改进，辐射防护取得了一定的经验，机组大修的集体剂量控制有效。本文主要介绍秦山核电站大修期间辐射控制的实践与优化。

At the PWR nuclear power plants, more than 80% of Annual Collective Radiation Expo- sure Dose of workers can be attributed to the maintenance activities during refueling outage, so the collec- tive dose control effect is reflection of the radiation protection management level in NPP. During the out- age there are higher radiation works and more workers, so the exposure risk is definitely higher. Therefore the dose control during outage is one of the most important tasks for the radiation protection in NPP. Qin- shah NPP has completed 11 refueling outages, through gradual improvement, some good experience has been obtained and the collective dose has been controlled effectively. This paper introduces the dose con- trol practice and optimization at Qinshan NPP.