Location attempts of a heated and irradiated portion in a silicone rubber insulated cable by frequency domain reflectometry and line resonance analysis

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Electric cables play important roles for supplying power and for transmitting information and control signals. Therefore, their degradation may cause a serious problem. Silicone rubber (SiR) is widely used for electrical insulation in safety-related cables in nuclear power plants. In this paper, the ability of locating a degraded portion in a duplex cable insulated with SiR was compared between a system based on frequency domain reflectometry (FDR) being developed by the authors and a commercially available system called line resonance analysis (LIRA). Reflecting the fact that the FDR system can expand the measurement frequency range, FDR shows a higher sensitivity and a better resolution than LIRA. However, both methods cannot detect the degradation of SiR before its further use becomes uncommendable.

Original languageEnglish
Pages (from-to)553-560
Number of pages8
JournalIEEJ Transactions on Fundamentals and Materials
Issue number9
Publication statusPublished - 2016



  • Characteristic impedance
  • Frequency domain reflectometry
  • Line resonance analysis
  • Location of an aged portion
  • Nuclear power plant
  • Safety-related cable

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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