A case study on detection and sizing of defects in steam generator tubes using eddy current testing

作者：Hur Do Haeng^*; Choi Myung Sik; Lee Deok Hyun; Kim Seon Jin; Han Jung Ho

来源：Nuclear Engineering and Design, 2010, 240(1): 204-208.

DOI：10.1016/j.nucengdes.2009.10.006

Eddy current testing (ECT) method is widely used to detect various types of defects occurring in nuclear steam generator tubes. Therefore, the reliability of its detection and sizing accuracy for defects should be validated. For this purpose, two tubes with defect signals were pulled from an operating steam generator and destructively examined. The defect type was a circumferential crack for one tube and an intergranular attack (IGA) for the other tube. The plus point coil probe showed a better capability to detect and size both a circumferential crack and a volumetric IGA than pancake and bobbin coil probe. The destructive results are correlated with the ECT results obtained during the in-service inspection.

• 出版日期2010-1