基于PHREEQC模拟腐蚀产物在压水堆一回路水化学环境下溶解机制研究  

Study on the Dissolution Mechanism of Corrosion Products in the Primary Circuit Water Chemistry Environment of Pressurized Water Reactors Based on PHREEQC Simulation

作　　者：龚晓舟 刘亨涛 GONG Xiao-zhou;LIU Heng-tao(Sun Yat-sen University,Zhuhai Guangdong 519000)

机构地区：[1]中山大学,广东珠海519000

出　　处：《长沙航空职业技术学院学报》2025年第1期28-33,共6页Journal of Changsha Aeronautical Vocational and Technical College

摘　　要：利用PHREEQC软件模拟了压水堆一回路水化学环境下腐蚀产物的溶解行为。结果显示,稳态下腐蚀产物溶解度随温度升高而降低,FeCr_(2)O_(4)的溶解度非单调变化。在氧化运行阶段,Ni主要以Ni^(2+)形态存在,具有较高溶解度;Cr主要以Cr(Ⅵ)的氧化态存在,溶解度极低;而Fe主要以Fe(OH)_(2)^(+)、FeOH^(2+)、Fe(OH)_(3)的形式存在,溶解度较低。这些发现为优化核电厂的水化学管理策略提供了重要的基础参数,并有助于开发清洁维护策略,保障核电站人员安全。The paper simulated the dissolution behavior of corrosion products in the primary circuit water chemistry environment of pressurized water reactors using PHREEQC software.Results show that under steady-state conditions,the solubility of corrosion products decreases with increasing temperature,and the solubility of FeCr_(2)O_(4) exhibits non-monotonic changes.During the oxidative operation phase,Ni predominantly exists as Ni^(2+) with high solubility;Cr mainly exists in the Cr(Ⅵ)oxidation state with very low solubility;and Fe mainly exists as+Fe(OH)_(2),FeOH^(2+),and Fe(OH)_(3) with relatively low solubility.Thesefindings provide crucial baseline parameters for optimizing water chemistry management strategies in nuclear power plants and aid in developing cleaning and maintenance strategies to ensure the safety of nuclear power station personnel.

关 键 词：压水堆一回路 腐蚀产物 溶解 

分 类 号：TL421.1[核科学技术—核技术及应用]