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
Subjects
Computer simulation
Eddy current testing
Eddy currents
Finite element analysis
Finite element method
Generators
Impedance measurement
Mathematical models
Nondestructive testing
Nuclear power plants
Performance enhancement
Power plants
Scientific papers
Steam power
Three dimensional models
Tubes
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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