【摘要】 概述了淤渣对蒸汽发生器(SG)传热管的腐蚀损坏,化学清洗技术维护核电厂SG传热管完整性的作用以及各国核电厂SG采用化学清洗技术的概况。介绍了研制出的适用于我国核电厂SG化学清洗的化学清洗剂(以EDTA为主)和工艺(温度低于100℃)及其工程应用技术:PWR SG二次侧管束区和全管束区化学清洗剂组分及化学清洗工艺,化学清洗过程监测技术(有效性监测方法和安全性监测方法),化学清洗废液处置方式和核电厂化学清洗系统。提出了预防核电厂SG二次侧内淤渣沉积的措施和建议,简要介绍正在进行的二回路水化学优化的研究工作。更多还原

【Abstract】 The sludge induced corrosion damage to secondary side of tubes of Steam Generator (SG), effect of chemical cleaning technique on maintance integrity of tubes of SG NPP and use of chemical cleaning technique in SG NPP have been summarized. The engineering technique of chemical cleaning for removing sludge in secondary side of SG NPP has been studied and qualified by CIAE (China Institute of Atomic Energy). Chemical cleaning engineering technique is introduced (main agent is EDTA, temp. < 100 ℃), including chemical cleaning technology for tube plate and full tube nest of secondary side of SG, the monitoring technique of chemical cleaning process (effectiveness and safety), the disposal method of wastage of chemical cleaning, the system of chemical cleaning. The method for preventing sludge deposition in secondary side and the research on advanced water chemistry of secondary loop are introduced.更多还原