主泵热屏蔽法兰接管角焊缝质量问题研究  

Study of Weld Seam Quality of RCP Thermal Barrier Flange Fillet

作　　者：刘勇波 崔振海 

机构地区：[1]中广核工程有限公司设备采购成套中心 [2]中广核工程有限公司

出　　处：《设备监理》2017年第4期52-55,共4页Plant Engineering Consultants

摘　　要：主泵是核电站核岛中确保冷却水环路正常运转的关键设备。某项目主泵在制造完成时,通过内窥镜检测发现在热屏蔽法兰的接管座角焊缝内表面存在缺陷。为了分析缺陷的性质和成因,在根本原因分析的基础上,进行模拟焊接试块的对比分析,证实缺陷是焊缝层间夹渣在内表面机加工之后的显示。根据分析结论,制定了有针对性的返修方案,并从质量控制的角度提出预防措施,为后续项目提供借鉴。The reactor coolant pump （RCP） is crucial for keeping normal running of the cooling water loop in a nuclear power plant. Here is an example of equipment supervision service in guaranteeing the quality of the pump. Defect was found with endoscope on the inner weld surface of the thermal barrier flange fillet. A comparative analysis of stimulation weld test coupons confirmed that the deviation resulted from the residual of the seam layer slag after internal welding machining. Based on the analysis, repair countermeasures were made. Rule-of-thumb precautions for quality control are presented to provide references for later similar projects.

关 键 词：主泵 热屏蔽法兰 内表面缺陷 质量控制 风险分析及预防 

分 类 号：TM623[电气工程—电力系统及自动化]