Non-destructive examination using a flexible multi-coil eddy current probe for weld surfaces of core internal components of nuclear power plants
Abstract:An eddy current testing (ECT) probe has been developed for inspecting the nickel-based alloy welded surfaces of components in the reactor pressure vessels of nuclear power plants. A flexible multi-coil eddy current probe has consistent detection sensitivity for surface flaws in the inspection region, which is independent of the shape of the component's surface down to a radius of curvature of 10 mm. The probe can discriminate flaws from other signal factors by using a combination of array coil signals and it can estimate flaw length accurately by a decibel drop method. The probe is applied to a mock-up of core internal components and its validity is confirmed.
Document Type: Research Article
Publication date: March 1, 2012
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- Official Journal of The British Institute of Non-Destructive Testing - includes original research and devlopment papers, technical and scientific reviews and case studies in the fields of NDT and CM.
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