核电站阴极保护系统主要用于保护鼓网、格栅、凝汽器水室、冷源管道等海水相关设备。在核电站换料大修期间的阴极保护系统检修中对典型故障进行分析，结合核电站预防性维修管理大纲与系统运维程序，提出了阴极保护系统的维护策略，确保在核电站商运期间阴极保护系统正常稳定运行，防止被保护设备发生腐蚀。

Cathodic protection systems of nuclear power plant are mainly used to protect sea water related equipment such as drum net, grille, condenser water chamber and cold source pipeline. The typical faults were analyzed during the check and reparation of cathodic protection system in refueling overhaul of nuclear power plant. And the maintenance strategy of cathodic protection system was put forward combining the preventive maintenance and management program with the system operation and maintenance procedures of nuclear power plant, to ensure normal and stable operation of cathodic protection system during plant commercial operation and to prevent the corrosion of the protected equipment.