Non-destructive testing by using the rotational magnetic flux type probe for SG tubes

摘要

The rotational magnetic flux type eddy current testing (EMF-ECT) probe is applied to detection of a small outer crack on a steam generator tube with sources of noise such as a pipe holder and sludge. From results of experiments, when a small outer crack exists on a boundary between a pipe holder and sludge, the output signal of this RMF-ECT probe is influenced by sources of noise. Even if the noise source exists, this probe can detect the defect according to the kind of the noise source. In this paper, crack detection characteristics of our RMF-ECT probe under the noisy environment are presented.