压水堆一回路中硅酸盐沉积研究

Study on Silicate Deposition in Primary Circuit of Pressurized Water Reactor

我国的核能处于一个高速发展阶段,核能由于清洁等特性,为电力保障和实现“双碳”目标做出巨大贡献。简述了压水堆一回路冷却剂系统的管理模式,在高温高压水环境中,硅酸盐等腐蚀产物沉积在结构材料表面,严重威胁核电站的安全。主要采用热力学分析的方法,利用E-pH图确定了Si-H_(2)O体系的稳定固相,绘制出SiO_(2)沉淀溶解度随温度变化曲线,有利于进一步探究硅酸盐在一回路中的沉积行为。

China's nuclear energy is in a stage of rapid development,and nuclear energy has made great contributions to power security and the realization of the carbon peaking and carbon neutrality goals due to its clean characteristics.This paper briefly describes the management mode of primary coolant system of pressurized water reactor.In high temperature and high pressure water environment,silicate and other corrosion products deposit on the surface of structural materials,which seriously threatens the safety of nuclear power plant.The stable solid phase of Si-H_(2)O system was determined by using the method of thermodynamic analysis and E-pH diagram,and the curve of the solubility of SiO_(2) precipitation with temperature was plotted,which is beneficial to further explore the deposition behavior of silicate in the primary circuit.