Changes in chemical structure and mechanical properties of cross-linked polyethylene aged under simulated severe accident conditions of a nuclear power plant

Yu Miyazaki*, Naoshi Hirai, Yoshimichi Ohki

*この研究の対応する著者

研究成果: Article査読

3 被引用数 (Scopus)

抄録

Sheets of cross-linked polyethylene (XLPE), which is believed to be the same as that for electrical insulation in safety-related cables in nuclear power plants, were aged under simulated severe accident conditions. Infrared absorption spectroscopy, indenter modulus measurement, and tensile tests were conducted to investigate the correlation between the aging-induced changes in chemical structure and those in the mechanical properties of XLPE. As a result, it has become clear that XLPE is oxidized to form carbonyl groups and becomes slightly brittle by the gamma-irradiation at 100°C. The gamma-irradiation at room temperature scarcely changes the chemical structure and softness. Instead, such gamma-irradiation apparently slows down the progress of embrittlement induced by the subsequent steam exposure at 220°C due to the presence of cross-linked structures.

本文言語English
ページ(範囲)445-450
ページ数6
ジャーナルIEEJ Transactions on Fundamentals and Materials
140
9
DOI
出版ステータスPublished - 2020 9月 1

ASJC Scopus subject areas

  • 電子工学および電気工学

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