Aging State Analysis of Safety-related Cables for Nuclear Power Plants Exposed to Simulated Accident Conditions

Takefumi Minakawa, Masaaki Ikeda, Naoshi Hirai, Yoshimichi Ohki

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

2 Citations (Scopus)

Abstract

Several cables in safety-related systems in nuclear power plants are required to maintain their intended electrical insulating function while they are exposed to harsh environmental conditions in the primary containment vessel during assumed accidents. This must be satisfied even after the cables are operated for their full service period. For such cables, the behavior of their insulation under accidents is a matter of concern. In this research, after silicone rubber insulated cables were pre-aged by simultaneous thermal and radiation exposure, they were irradiated or exposed to high temperature steam to simulate the environmental conditions during the accident, or subjected to the combination of these conditions. The resultant changes in various properties were analyzed by instrumental analyses. As a result, it has been confirmed that the pre-aging and radiation exposure induce cross-linking and depolymerization of siloxane chains to produce cyclic siloxanes, whereas the steam exposure causes significant depolymerization and the generation of low-molecular cyclic siloxanes.

Original languageEnglish
Title of host publication2018 IEEE CEIDP Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages602-605
Number of pages4
Volume2018-October
ISBN (Electronic)9781538661925
DOIs
Publication statusPublished - 2018 Nov 26
Event2018 IEEE CEIDP Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2018 - Cancun, Mexico
Duration: 2018 Oct 212018 Oct 24

Other

Other2018 IEEE CEIDP Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2018
CountryMexico
CityCancun
Period18/10/2118/10/24

ASJC Scopus subject areas

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

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  • Cite this

    Minakawa, T., Ikeda, M., Hirai, N., & Ohki, Y. (2018). Aging State Analysis of Safety-related Cables for Nuclear Power Plants Exposed to Simulated Accident Conditions. In 2018 IEEE CEIDP Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2018 (Vol. 2018-October, pp. 602-605). [8544872] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CEIDP.2018.8544872