某核电凝汽器低电位铝阳极阴极保护优化设计研究

Optimization Design of Low Voltage Aluminum Anode Cathodic Protection for Condenser in Nuclear Power Plant

数值仿真是研究、优化牺牲阳极阴极保护效果的重要方法。针对核电凝汽器阴极保护需求,完成基于低电位牺牲阳极阴极保护设计,开展了基于有限元数值计算的仿真模拟,研究了不同保护方案对凝汽器保护电位分布的影响。结果表明,采用优化的低电位阳极阴极保护方案,凝汽器中不锈钢组件的保护电位在-493~-810mV之间,钛组件保护电位在-386~-678mV之间,既可满足凝汽器阴极保护电位要求,又可以降低钛材的氢脆风险。

Numerical simulation is an important method to study and optimize the cathodic protection effect of sacrificial anode.The cathodic protection design of nuclear power condenser based on low voltage sacrificial anode was completed.In order to optimize the cathodic protection scheme of low voltage anode system,the simulation based on finite element numerical calculation was carried out,and the influence of different schemes on the condenser protection potential distribution was studied.The results show that if optimized low voltage anode cathodic protection scheme is used,the protective potential of stainless-steel components in condenser is between-493~-810mV,and the potential of titanium components is between-386~-678mV.The scheme can not only meet the requirement of cathodic protection potential,but also reduce the risk of hydrogen embrittlement of titanium components.