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- Title
Non-destructive examination using a flexible multi-coil eddy current probe for weld surfaces of core internal components of nuclear power plants.
- Authors
Nishimizu, A; Endo, H; Tooma, M; Otani, K; Ouchi, H; Yoshida, I; Nonaka, Y
- 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.
- Subjects
NONDESTRUCTIVE testing; NUCLEAR power plants; EDDY current testing; WELDABILITY of metals; ELECTRIC coils; DECIBELS; STRESS corrosion cracking
- Publication
Insight: Non-Destructive Testing & Condition Monitoring, 2012, Vol 54, Issue 3, p134
- ISSN
1354-2575
- Publication type
Article
- DOI
10.1784/insi.2012.54.3.134