Detection using frequency domain reflectometry of the permittivity change in a cable induced by the exposure to steam

Naoshi Hirai*, Yoshimichi Ohki

*Corresponding author for this work

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

Abstract

The fault location method that the authors are developing possesses a very high spatial resolution. If the characteristic impedance of a cable is changed, for whatever reason, the location method can find its position. In other words, this method can detect the changes in characteristic impedance. Since the characteristic impedance is a function of the permittivity of the cable insulation, this method can detect the change in permittivity of the insulation non-destructively without disassembling the cable. This paper demonstrates the above, taking a 30-m coaxial cable and a 2.5-m safety-related cable for use in a nuclear power plant as two typical examples.

Original languageEnglish
Title of host publicationProceedings of 2020 International Symposium on Electrical Insulating Materials, ISEIM 2020
PublisherInstitute of Electrical Engineers of Japan
Pages190-193
Number of pages4
ISBN (Electronic)9784886864185
Publication statusPublished - 2020 Sep 13
Event2020 International Symposium on Electrical Insulating Materials, ISEIM 2020 - Virtual, Tokyo, Japan
Duration: 2020 Sep 132020 Sep 17

Publication series

NameProceedings of the International Symposium on Electrical Insulating Materials
Volume2020-September

Conference

Conference2020 International Symposium on Electrical Insulating Materials, ISEIM 2020
Country/TerritoryJapan
CityVirtual, Tokyo
Period20/9/1320/9/17

Keywords

  • Cable monitoring
  • Fast Fourier transform
  • Frequency domain reflectometry
  • Nuclear power plant
  • Severe accident

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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