Neutron and gamma ray irradiation effects on interlaminar shear strength of insulation materials with cyanate ester-epoxy blended resin

Arata Nishimura, Yoshinobu Izumi, Masahiro Imaizumi, Shigehiro Nishijima, Tsutomu Hemmi, Tatsuo Shikama

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

A large scale fusion device like ITER requires high performance electric insulation materials against gamma ray and neutron irradiation, since fusion neutrons will reach superconducting magnets and activate them. Cyanate ester resin has been studied as a strong candidate for a new insulation material for fusion devices, and it has been clarified that the blended resin with epoxy has a potential to survive a design period in the radiation environment. This paper describes the results of molecular structure analysis of the blended resin, heat flux measurements by differential scanning calorimetry and the gamma ray and the fission neutron irradiation effects on interlaminar shear strength (ILSS) at 77 K. The gamma ray irradiation of 10 MGy did not change the ILSS significantly, but the neutron fluence of 1.0 × 1022 n/m 2 (>0.1 MeV) with over 400 MGy degraded the ILSS. It suggests that cyanurate (triagine ring) will have a resistance against irradiation but oxazolidinon will lose the resistance after heavy irradiation.

Original languageEnglish
Pages (from-to)1558-1561
Number of pages4
JournalFusion Engineering and Design
Volume86
Issue number6-8
DOIs
Publication statusPublished - 2011 Oct

Keywords

  • Cyanate ester resin
  • Electric insulation material
  • Epoxy resin
  • Gamma ray irradiation
  • Neutron irradiation
  • Superconducting magnet

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

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