Insulation performance of safety-related cables for nuclear power plants under simulated severe accident conditions

Takefumi Minakawa, Masaaki Ikeda, Naoshi Hirai, Yoshimichi Ohki

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

1 Citation (Scopus)

Abstract

To examine electrical insulation behavior of cables under severe accident environmental conditions, safety-related low voltage cables used as severe accident management equipment were subjected to two tests that simulated two environments: 1) at 155 oC, which is the simulated highest assumed temperature when proper accident management measures are taken, 2) at 200 oC, which is the maximum durable temperature of a primary containment vessel. In addition, electrical insulation resistance was measured for the cables during steam exposure in the two tests. As a result, all the cables passed the acceptance criteria of the tests. The minimum volume resistivity of the cables during the test at 155 oC was around 108 Ωm, confirming that the cables have a sufficient insulation performance. On the other hand, the minimum volume resistivity during the severer test at 200 oC was around 105 Ωm due to the increase in leak current.

Original languageEnglish
Title of host publicationProceedings of 2017 International Symposium on Electrical Insulating Materials, ISEIM 2017
PublisherInstitute of Electrical Engineers of Japan
Pages716-719
Number of pages4
Volume2
ISBN (Electronic)9784886860996
DOIs
Publication statusPublished - 2017 Dec 4
Event2017 International Symposium on Electrical Insulating Materials, ISEIM 2017 - Toyohashi, Japan
Duration: 2017 Sep 112017 Sep 15

Other

Other2017 International Symposium on Electrical Insulating Materials, ISEIM 2017
CountryJapan
CityToyohashi
Period17/9/1117/9/15

Keywords

  • Electrical volume resistivity
  • Ethylene propylene diene rubber
  • Nuclear power plant
  • Severe accident
  • Silicone rubber

ASJC Scopus subject areas

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

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  • Cite this

    Minakawa, T., Ikeda, M., Hirai, N., & Ohki, Y. (2017). Insulation performance of safety-related cables for nuclear power plants under simulated severe accident conditions. In Proceedings of 2017 International Symposium on Electrical Insulating Materials, ISEIM 2017 (Vol. 2, pp. 716-719). Institute of Electrical Engineers of Japan. https://doi.org/10.23919/ISEIM.2017.8166590