Impedance measurement and computation for the steam-generator tube integrity using the ECNDT technique

The purpose of this research paper is to characterize and extract crack defects from steam-generator (SG) tubes, operating in nuclear-power plants by using an eddy-current nondestructive testing (ECNDT) technique. Modeling and simulation using this technique make it possible to characterize the eddy...

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Bibliographic Details
Published inElektrotehniski Vestnik Vol. 85; no. 5; pp. 235 - 240
Main Authors Chebout, M, Mekideche, M R, Hafaifa, A, Kouzou, A, Allag, H
Format Journal Article
LanguageEnglish
Published Ljubljana Elektrotehniski Vestnik 01.01.2018
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Summary:The purpose of this research paper is to characterize and extract crack defects from steam-generator (SG) tubes, operating in nuclear-power plants by using an eddy-current nondestructive testing (ECNDT) technique. Modeling and simulation using this technique make it possible to characterize the eddy-current sensors and to improve their performances while limiting the number of experimental prototypes and thus the development costs. The paper describes an effective ECNDT technique enabling detection of a small crack defect or discontinuity in the form of a narrow crack in cylindrical structures by using a particular sensor configuration based on the numerical technique. The results prove the efficiency of a 3D FEM model implemented based on the Comsol multiphysics software, which can understand , quantifies and accurately predicts the eddy-current signals determining the interaction between defected SG tube wall, and the eddy-current probe response. By using the multifrequency technique the entire crack depth of a conductive-test specimen is scanned. Our calculation results are verified by comparing them with the experimental ones and a good agreement between them is observed.
ISSN:0013-5852
2232-3236