Vibrations of probe used for the defect detection of helical heating tubes in a fast breeder reactor. Part 1. Experimental results by using mock-up

Takumi Inoue, Atsuo Sueoka, Yutaka Nakano, Hiroyuki Kanemoto, Yoshiyuki Imai, Toshihiko Yamaguchi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This paper deals with the vibration and the sensor signal noise of the eddy current testing (ECT) probe used for a defect detection of helical heating tubes in the fast breeder reactor "Monju", developed in Japan. ECT probes are used for the detection of defects in a heating tube. The heating tube is composed of a helical tube and a straight tube because of their advantages of thermal efficiency and saving space. No vibrations of the ECT probe have been generated in usual straight heating tubes. However, vibrations of the ECT probe in the helical tube cause some noise and decrease the sensitivity of the ECT probe. The experiment was performed using a mock-up, and the noise characteristics of an ECT sensor mounted in an ECT probe were examined. The experimental results showed that the sensor signal noise during the insertion process of the ECT probe was higher than that of the return process, and vibrations of the insertion process had a certain emerging frequency. Attaching the long and flexible guide probe to the top of the ECT probe was an effective countermeasure against sensor signal noise.

Original languageEnglish
Pages (from-to)858-867
Number of pages10
JournalNuclear Engineering and Design
Volume237
Issue number8
DOIs
Publication statusPublished - Apr 1 2007

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Safety, Risk, Reliability and Quality
  • Waste Management and Disposal
  • Mechanical Engineering

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