原子力発電所の重大事故模擬環境下で劣化された架橋ポリエチレンの化学構造と機械的特性の変化

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2020/09/01

タイトル(英語): Changes in Chemical Structure and Mechanical Properties of Cross-linked Polyethylene Aged under Simulated Severe Accident Conditions of a Nuclear Power Plant

著者名: 宮﨑　悠（早稲田大学電気・情報生命専攻），平井　直志（早稲田大学材料技術研究所），大木　義路（早稲田大学電気・情報生命専攻／早稲田大学材料技術研究所）

著者名(英語): Yu Miyazaki (Department of Electrical Engineering and Bioscience, Waseda University), Naoshi Hirai (Research Institute for Materials Science and Technology, Waseda University), Yoshimichi Ohki (Department of Electrical Engineering and Bioscience, Waseda University/Research Institute for Materials Science and Technology, Waseda University)

キーワード: 酸化，赤外吸収分光，引張試験，インデンターモジュラス，水蒸気暴露，原子力発電所　　oxidation，infrared absorption spectroscopy，tensile test，indenter modulus，steam exposure，nuclear power plant

要約(英語): 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℃. 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℃ due to the presence of cross-linked structures.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.140 No.9 （2020） 特集：電気電子絶縁材料システムシンポジウム

本誌掲載ページ: 445-450 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/140/9/140_445/_article/-char/ja/