高压加热器支撑板区域点状缺陷涡流检测的局限性  

Limitations of Eddy Current Testing for Spot Defects in Support Plate Area of High Pressure Feedwater Heater

作　　者：徐玉颖 XU Yuying(State Nulclear Power Plant Service Company,Shanghai 200233,China)

机构地区：[1]国核电站运行服务技术有限公司,上海200233

出　　处：《无损探伤》2024年第3期32-35,共4页Nondestructive Testing Technology

摘　　要：高压加热器作为二回路上的重要设备,主要缺陷为外壁点蚀,若是支撑板附近有缺陷产生,缺陷信号会受到支撑板较大的干扰,影响缺陷的准确评定。本文通过实验确认支撑板的具体影响范围,讨论了在该影响范围内缺陷检测结果的准确性,并给出了一定的建议。As an important equipment in the secondary circuit,the main defect of the high-pressure feed water heater is pitting corrosion on the outer wall.If there is a defect near the support plate,the defect signal will be greatly disturbed by the support plate,affecting the accurate evaluation of defects.This article confirms the specific influence range of the support plate through experiments,discusses the accuracy of defect detection results within this influence range,and provides certain suggestions.

关 键 词：高压加热器 支撑板 缺陷信号 主频 混频 

分 类 号：TG115.28[金属学及工艺—物理冶金]