一回路注锌对腐蚀产物的影响分析

目前的压水堆中多采用注锌技术来降低一回路腐蚀产物的源项，然而关于注锌对腐蚀产物影响的理论机理以及计算分析研究较为欠缺。基于此，本文从理论机理、程序开发、数值计算分析和实验验证的角度论证分析注锌对一回路腐蚀产物以及源项的影响。理论计算表明：注锌能明显降低基体金属中镍和钴的溶解；随着运行时间的增加，注锌对一回路冷却剂中的⁵⁸Co和⁶⁰Co呈现出抑制作用；注锌实验结果与理论计算分析的比值在0.5～2.0范围内，符合情况良好。本研究能为核电厂合理地采取注锌技术提供理论支撑。

Effect Analysis of Zinc Injection on Corrosion Product in Primary Circuit

At present, zinc injection technology is used in PWR to reduce the corrosion product source term in primary circuit, however, the theoretical mechanism and calculation analysis of the effect of zinc injection on corrosion products are relatively lacking. In this paper, the effect of zinc injection on corrosion products and source terms in primary circuit was demonstrated and analyzed from the aspects of theoretical mechanism, program development, numerical calculation analysis and experiment verification. The theory calculation indicates that zinc injection can significantly reduce the dissolution of nickel and cobalt in the basic metal. With the increase of running time, zinc injection inhibites ⁵⁸Co and ⁶⁰Co in primary coolant, that is, it shows a trend of gradual decline over time. The ratio of experimental results and theoretical calculation of zinc injection is within the range of 0.5-2.0, which is in good agreement. This study can provide theoretical support for rational application of zinc injection technology in nuclear power plants.