Novel eddy current probes for pipes: Application in austenitic round-in-square profiles of ITER

Miguel A. Machado, Luis S. Rosado, Nuno Pedrosa, Alexander Vostner, R. M. Miranda, Moisés Piedade, Telmo G. Santos

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Novel eddy current probes were developed to detect sub-millimetre defects with any orientation on the inner surface of pipes. Five different probes were designed, produced and experimentally validated. These probes include arrays of planar trapezoidal coils in a flexible substrate used alone or together with different winded drive coils. Numerical simulations with Finite Element Method were used to predict the probe response to defects with any orientation. Experimental results in austenitic steel jackets used in ITER revealed that the new probes have an improved reliability compared to conventional toroidal bobbin probes, allowing a higher sensitivity to circumferential defects.

Original languageEnglish
Pages (from-to)111-118
Number of pages8
JournalNdt & E International
Volume87
DOIs
Publication statusPublished - 1 Apr 2017

Keywords

  • Eddy currents
  • JK2LB
  • Pipe inspection
  • Probes

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