三门核电AP1000机组辐射防护设计分析

Analysis on radiation protection design of AP1000 unit of Sanmen nuclear power plant

三门核电AP1000机组为第三代核电机组,在辐射防护设计中采用了一回路加锌、较高pH值运行、停堆氧化操作、蒸汽发生器一回路水室电解抛光、优化设备维修、优化屏蔽设计、无线剂量监测等措施,以期降低机组辐射水平和职业照射剂量。本文介绍了三门核电AP1000机组在功率运行及大修期间的辐射水平和职业照射剂量数据,并与国内CPR1000机组的相关数据进行了对比,对AP1000机组的辐射防护设计进行分析,给出了三门核电AP1000机组在辐射防护运行管理及技术改进方面的建议。

AP1000 unit of Sanmen nuclear power plant is the third-generation nuclear power unit.In order to reduce the unit radiation level and occupational exposure dose,the design of radiation protection has adopted many measures,such as adding zinc of primary,operating at higher pH value,shutdown oxidation operation,steam generator primary water chamber electropolishing,optimizing equipment maintenance,optimizing shielding design,wireless dose monitoring,etc.This paper introduces the radiation level and occupational radiation dose data of AP1000 units of Sanmen nuclear power plant during operation and overhaul,and compared with the relevant data of domestic CPR1000 units,to analyse the radiation protection design of AP1000 units.And giving the suggestions on radiation protection operation management and technical improvement of AP1000 units of Sanmen nuclear power plant.