Impurities such as pipeline corrosion products and dissolved oxygen etc.in the secondary circuit of pressurized water reactor(PWR)can enter the steam generator through the water supply sys-tem and deposit at different positions,resulting in the decrease of heat transfer capacity and the instabili-ty of thermal and hydraulic system.The water chemistry control in secondary circuit of PWR is of great significance for a safe operation of system equipment and core components.The purpose of this work is to summarize the application of pH control agents at home and abroad,and the research progress in the compatibility between employed alkalizing agents and structural materials.Firstly,the development pro-cess in alkalizing agent for PWR secondary circuit and its application at home and abroad are detailed.Secondly,the factors influencing the compatibility between the employed alkalizing agents and structural materials are discussed from three aspects:structural materials,hydrochemistry and the physicochemical properties of alkalizing agents.Finally,the working mechanism of alkalizing agent in adjusting pH is dis-cussed,especially the mechanism of interactions between amine molecules and the oxide scales formed on the surface of structural materials.
关键词
二回路/碱化剂/水化学/乙醇胺/结构材料
Key words
secondary circuit/alkalizing agent/water chemistry/ethanolamine/structural material
维普
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