Development of an arrayed multi-coil eddy current testing probe without less sensitive regions and its application to steam generator tube inspection with noise source outside

Nozomu Sakurai, Haoyu Huang, Toshiyuki Takagi, Tetsuya Uchimoto

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

This paper describes improvement of an arrayed multi-coil probe of eddy current testing for steam generator tubes which was previously reported by the authors. Owing to the multi-coil arrangement, the present probe can detect cracks in the whole round of the tube without rotation, which leads to speedy scan of tubes. However, the authors confirmed the existence of less sensitive zone in the previous paper. In this paper, arrangement of element coils was considered with the help of numerical simulation so as to eliminate less sensitive zones. Experiment with use of the improved probe showed that maximum decrease of crack signals was improved to be 5% from 20% due to the change of coil arrangement in the probe. In addition, it was confirmed that the present probe can detect a outer defect of 20% in steam generator tubes with simulated support structures which are noise sources.

Original languageEnglish
Pages (from-to)1574-1580
Number of pages7
JournalNippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume69
Issue number11
DOIs
Publication statusPublished - 2003 Nov

Keywords

  • Arrayed multi-coil probes
  • Eddy current testing
  • Less sensitive regions
  • Numerical simulation
  • Steam generator tubes

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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