重大事故環境下での原子力発電所用安全系低圧ケーブルの絶縁特性に及ぼす酸素の影響

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: 2023/03/01

タイトル(英語): Influence of Oxygen on Insulation Performance of Safety-related Low-voltage Cables for Nuclear Power Plants under Severe Accident Conditions

著者名: 芳賀　明日香（原子力規制庁長官官房技術基盤グループ），渡辺　藍己（原子力規制庁長官官房技術基盤グループ），皆川　武史（原子力規制庁長官官房技術基盤グループ），池田　雅昭（原子力規制庁長官官房技術基盤グループ），平井　直志（早稲田大学材料技術研究所），大木　義路（早稲田大学材料技術研究所）

著者名(英語): Asuka Haga (Regulatory Standard Research Department, Secretariat of Nuclear Regulation Authority (S/NRA/R)), Aiki Watanabe (Regulatory Standard Research Department, Secretariat of Nuclear Regulation Authority (S/NRA/R)), Takefumi Minakawa (Regulatory Standard Research Department, Secretariat of Nuclear Regulation Authority (S/NRA/R)), Masaaki Ikeda (Regulatory Standard Research Department, Secretariat of Nuclear Regulation Authority (S/NRA/R)), Naoshi Hirai (RIMST, Waseda University), Yoshimichi Ohki (RIMST, Waseda University)

キーワード: 原子力発電所，重大事故，蒸気暴露，ケーブル，エチレンプロピレンジエンゴム_x000D_　　nuclear power plant，severe accident，steam exposure，cable，ethylene propylene diene rubber

要約(英語): Some safety-related low-voltage cables used in nuclear power plants are required to maintain the insulation performance even during severe accidents. It is not clear whether oxygen affects the insulation performance of the cable in the steam exposure during a severe accident. In this study, we investigated the influence of oxygen on the insulation performance in an assumed severe accident condition for flame-retardant ethylene propylene diene rubber insulation (FR-EPDM) cables used as safety-related cables. Cables pre-aged by accelerated aging and non-treated ones were used as samples. The following points were found. When oxygen is present in water vapor, the oxygen concentration decreases during the exposure since oxygen is consumed by the oxidation of insulators and other materials. Whether or not the cable was subjected to aging does not alter the insulation resistance of the cable significantly under the assumed severe accident condition. The oxygen contained in water vapor affects the insulation resistance of the cable scarcely under the condition.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.143 No.3 （2023）

本誌掲載ページ: 83-90 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/143/3/143_83/_article/-char/ja/