As an important part of the heat exchanger in nuclear power plant,the periodic testing and maintenance of the heat exchange tubes is of great significance to ensure the safety of nuclear power plant equipment and personnel.After the defects are detected by eddy current testing technology,it is necessary to conduct qualitative and quantitative analysis of the defects to identify the defects as inner wall,outer wall and through-hole defects.If only a single frequency is applied for detection,misjudgment will occur in some cases.In this paper,multifrequency eddy current detection technology is applied to study the defect classifi-cation identification method for heat exchange tubes.In view of the phenomenon that inner wall defects and outer wall defects are misjudged as pupil defects when they exist at the same time,a high frequency relative to the optimal detection frequency is used to make a comparison.The test results show that,The multi-fre-quency eddy current detection method can effectively identify the types of defects existing in the detection points of heat exchange tubes,and improve the detection accuracy of heat exchange tubes.
关键词
热交换管/多频涡流检测技术/缺陷鉴别
Key words
Heat exchange tube/Multifrequency eddy current testing technology/Defect identification
维普
万方数据