Structural Integrity Analysis of Nuclear Power Plant Pressure Vessel Penetration Nozzle Repaired

摘要：

　　Primary water stress corrosion cracking (PWSCC) has been observed in CRDM nozzles,BMI nozzles and other penetration nozzles.The industry has used the repair method of replacement of nozzles fabricated of Alloy 690.After the replacement of the nozzle,the structural integrity analysis of new nozzle and welds should be performed to ensure the pressure boundary compliance with the original design requirement.In this paper,the pressurizer top head instrument nozzle of PWR nuclear power plant is evaluated as a typical pressure vessel penetration nozzle.The results showed that the repaired nozzle satisfies the ASME Code design requirement and the crack growth of the postulated flaw in 40 years of the nuclear plant life is acceptable.

关键词： Penetration Nozzle J-groove Weld EPFM Fatigue Crack Growth NPP

作者: Linwei Ma Jiasheng He Aaqin Shu Xiaotao Zheng Yan Wang

作者单位: Wuhan Institute of Technology,206 Guangguyi Road,Wuhan 430205,China

会议类型: 国际会议

会议名称: 2016 International Symposium on Structural Integrity，ISSI—2016(2016国际结构完整性研讨会)

会议地点: 天津

会议语种:英文

页码: 346-350

在线出版日期: 2016-05-26（万方平台首次上网日期，不代表论文的发表时间）