Need for condition monitoring and diagnosis of electric wires and cables used in nuclear power plants

Yoshimichi Ohki, Naoshi Hirai, Toshio Yamamoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Electric cables in nuclear power plants have to function even after serious events such as a loss-of-coolant accident (LOCA). In most cables, organic polymers that are very sensitive to radiation are used. Nevertheless, much attention was not paid until recently. Under these circumstances, the Japanese government started an extensive research project to examine the degradation behavior of safety-related cables at three different temperatures with three different dose rates. An interim report published recently revealed that some cables would be unable to function after the LOCA test. In this paper, a brief outline of the interim report is described. Categorization of all the causes of malfunctions occurred in electric apparatus in all the Japanese nuclear power plants for recent about 40 years, revealed that there has been only one case of a slight malfunction of cable caused by degradation of polymer insulation, indicating that we don't have to worry so much. It is still very important to establish a proper condition monitoring method in order to secure much higher reliability.

Original languageEnglish
Title of host publicationProceedings of 2008 International Conference on Condition Monitoring and Diagnosis, CMD 2008
PublisherIEEE Computer Society
Pages1207-1211
Number of pages5
ISBN (Print)9781424416219
DOIs
Publication statusPublished - 2008 Jan 1
Event2008 International Conference on Condition Monitoring and Diagnosis, CMD 2008 - Beijing, China
Duration: 2008 Apr 212008 Apr 24

Publication series

NameProceedings of 2008 International Conference on Condition Monitoring and Diagnosis, CMD 2008

Conference

Conference2008 International Conference on Condition Monitoring and Diagnosis, CMD 2008
CountryChina
CityBeijing
Period08/4/2108/4/24

Keywords

  • Accidents
  • Aging
  • Cable insulation
  • Diagnosis
  • Maintenance
  • Monitoring
  • Nuclear power generation
  • Polymers
  • Radiation effects
  • Wire

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Safety, Risk, Reliability and Quality

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