Effects of gamma irradiation on the degradation of silicone rubber by steam exposure

Seitaro Ito, Yu Miyazaki, Naoshi Hirai, Yoshimichi Ohki*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Silicone rubber (SiR) is an important electrical insulating material for safety-related cables in nuclear power plants. This means that SiR must withstand the irradiation of gamma rays and the exposure to high-temperature steam. However, SiR is vulnerable to hydrolysis. Therefore, for the purpose of clarifying the behavior of SiR in such environments, sheets of SiR were exposed to steam at 171 or 200°C with and without pre-irradiation of gamma rays. As a result, it has become clear that SiR can withstand the exposure to high-temperature steam more robustly if it was irradiated by gamma rays to a proper dose in advance.

Original languageEnglish
Pages (from-to)166-172
Number of pages7
JournalJournal of Nuclear Science and Technology
Issue number2
Publication statusPublished - 2021


  • Inorganic polymer
  • degradation
  • insulation
  • irradiation
  • severe accident
  • silicone rubber
  • vapor exposure

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering


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