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Enhancing Nuclear Safety


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Eddy current flexible probes for complex geometries

G. Cattiaux, C. Gilles-Pascaud, J.M. Decitre, F. Vacher, C. Fermon, M. Pannetier,
QNDE 2005, 32nd Annual Review of Progress in Quantitative Nondestructive Evaluation, Brunswick, USA, July 31- August 5, 2005,
Rapport DSR 73

Document type > *Report/contribution to WG (paper or CD-Rom), *Congrès/colloque

Keywords > eddy current, Nondestructive Testing

Research Unit > IRSN/DSR/SAMS

Authors > CATTIAUX Gérard

Publication Date > 29/09/2005

Summary

The inspection of materials used in aerospace, nuclear or transport industry is a critical issue for the safety of components exposed to stress or/and corrosion. The industry claims for faster, more sensitive, and more flexible techniques. Technologies based on Eddy Current (EC) flexible array probe and magnetic sensor with high sensitivity such as giant magneto-resistance (GMR) could be a good solution to detect surface-breaking flaws in complex shaped surfaces. The CEA has recently developed, with support from the French Institute for Radiological Protection and Nuclear Safety (IRSN), a flexible array probe based on micro-coils etched on Kapton. The probe’s performances have been assessed for the inspection of reactor residual heat removal pipes, and for aeronautical applications within the framework of the European project VERDICT. The experimental results confirm the very good detection of narrow cracks on plane and curve shaped surfaces. This paper also describes the recent progresses concerning the application of GMR sensors to EC testing, and the results obtained for the detection of small surface breaking flaws.


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