核岛设备换热管内壁缺陷涡流检测定量方法

Quantitative Eddy Current Testing Method for Inner Wall Defects of Heat Exchange Tubes of Nuclear Power Equipment

结合核岛设备制造阶段换热管内壁可能产生的缺陷情况,通过制作一系列轴向内壁切槽模拟试样,采用线性拟合曲线的方式制作新的幅值-伤深曲线,对比分析幅值-伤深曲线与相位-伤深曲线对换热管内壁缺陷伤深定量,验证新拟合幅值-伤深曲线对内壁缺陷伤深定量的准确性.

Combined with the possible defects in the inner wall of heat exchange tube in the manufacturing stage of nuclear island equipment,a series of axial inner wall grooving simulation samples were made,and a new amplitude depth curve was made by using linear fitting curve.The quantitative analysis of the amplitude depth curve and phase depth curve on the inner wall defect depth of heat exchange tube was carried out to verify the effect of the new fitting amplitude depth curve on the inner wall defect depth The accuracy of deep quantitative analysis.