压水堆核电厂蒸汽发生器沉积物特性及其对缝隙化学影响  

Pressurized Water Reactor Steam Generator Deposit Characterization and Their Impact on Crevice Chemistry

作　　者：陈小东 孟秋节 习国才 宋利君[2,3] 肖艳 方军 CHEN Xiao-dong;MENG Qiu-jie;XI Guo-cai;SONG Li-jun;XIAO Yan;FANG Jun(Yangjiang Nuclear Power Co.,Ltd.Yangjiang 529599,China;Suzhou Nuclear Power Research Institute Co.,Ltd.Suzhou 215004,China;National Engineering Research Center for Nuclear Power Plant Safety&Reliability,Suzhou 215004,China)

机构地区：[1]阳江核电有限公司,广东阳江529599 [2]苏州热工研究院有限公司,江苏苏州215004 [3]国家核电厂安全及可靠性工程技术研究中心,江苏苏州215004

出　　处：《全面腐蚀控制》2025年第3期1-9,共9页Total Corrosion Control

基　　金：江苏省自然科学基金(BK20220257)。

摘　　要：随着压水堆核电机组运行时间增加,无论二回路水化学控制多么严格,蒸汽发生器中的沉积物不可避免地逐渐增加。杂质在沉积物形成的缝隙区聚集浓缩导致水质恶化,加速了蒸汽发生器性能降低,影响机组运行的安全与可靠性。本文阐述了蒸汽发生器沉积物来源、形态、分布及其危害,分析缝隙区杂质浓缩及水化学评价方法。比较分析了几种蒸汽发生器沉积物控制化学方法,有机胺碱化剂从源项上降低了腐蚀产物沉积速率,有利于蒸汽发生器安全可靠性与寿命。As the operating time of the PWR nuclear power plant increases,no matter how strict the secondary water chemistry control is,the deposits in the steam generator inevitably increases.Impurities accumulate and concentrate in the crevice areas formed by deposit,leading to water quality deterioration,accelerating the performance degradation of the steam generator,and affecting the safety and reliability of the unit.The article provides an overview of the deposit sources,forms,distribution,and damages to steam generator,then discusses impurity concentration in crevice areas and crevice water chemistry evaluation methods.Comparing and analyzing several chemical methods for controlling steam generator deposits,organic amines reduce the deposition rate of corrosion products from the source term,which is beneficial for the safety reliability and the service life of steam generators.

关 键 词：蒸汽发生器 沉积物 杂质浓缩 腐蚀 缝隙区水化学 

分 类 号：TL38[核科学技术—核技术及应用]