某核电机组阀门引漏管开裂原因  

Cracking reason of valve leak-off connection pipe of a nuclear power unit

作　　者：叶永魁 周浩 侯海彬 李旺 梅宝[2] 史志刚[2] YE Yongkui;ZHOU Hao;HOU Haibin;LI Wang;MEI Bao;SHI Zhigang(Ningde Nuclear Power Company,Ningde 315200,China;Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China)

机构地区：[1]福建宁德核电有限公司,宁德315200 [2]西安热工研究院有限公司,西安710054

出　　处：《理化检验（物理分册）》2023年第2期43-46,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：某核电机组阀门引漏管发生开裂,采用宏观观察、化学成分分析、金相检验、维氏硬度测试、扫描电镜和能谱分析等方法对引漏管的开裂原因进行分析。结果表明:引漏管开裂的原因为应力腐蚀,腐蚀介质为氯离子,最后提出了相关建议。Cracking occurred in the valve leak-off connection pipe of a nuclear power unit.The cracking causes of the leak-off connection pipe were analyzed by means of macroscopic observation,chemical composition analysis,metallographic examination,Vickers hardness test,scanning electron microscope and energy spectrum analysis.The results show that the cracking reason of the leak-off connection pipe was stress corrosion,and the corrosion medium was chloridion.Finally,relevant suggestions were put forward.

关 键 词：核电机组 引漏管 Z2CND17-12钢 应力腐蚀开裂 

分 类 号：TB31[一般工业技术—材料科学与工程] TG115.5[金属学及工艺—物理冶金]