1. INFLUENCE OF SIGNAL-TO-NOISE RATIO ON EDDY CURRENT SIGNALS OF CRACKS IN STEAM GENERATOR TUBES
- Author
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DO HAENG HUR, MYUNG SIK CHOI, HEE-SANG SHIM, DEOK HYUN LEE, and ONE YOO
- Subjects
Signal-to-Noise Ratio ,Detectability ,Sizing Accuracy ,Eddy Current Test ,Stress Corrosion Crack ,Nuclear engineering. Atomic power ,TK9001-9401 - Abstract
This work presents the influence of noise originating from the tube itself on the detectability and sizing accuracy for laboratory-induced outer diameter axial cracks in nuclear steam generator tubes. The variations of signal amplitude and phase angle of the same cracks were analyzed when increasing the signal-to-noise ratio of the tube itself from 9 to 18. It was experimentally verified that the detectability for small cracks was enhanced by increasing the signal-to-noise ratio. The phase angle also rotated to a value representing the actual position and depth of a crack when increasing the signal-to-noise ratio.
- Published
- 2014
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