原子力発電所用安全系低圧ケーブルの難燃性に対する経年劣化処理の影響

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: 2017/11/01

タイトル(英語): Effect of Pre-aging on Flame Retardancy of Safety-related Low Voltage Cables in Nuclear Power Plants

著者名: 皆川　武史（（独）原子力規制庁長官官房技術基盤グループ），池田　雅昭（（独）原子力規制庁長官官房技術基盤グループ）

著者名(英語): Takefumi Minakawa (Regulatory Standard and Research Department, Secretariat of Nuclear Regulation Authority (S/NRA/R)), Masaaki Ikeda (Regulatory Standard and Research Department, Secretariat of Nuclear Regulation Authority (S/NRA/R))

キーワード: 原子力発電所，火災防護，安全系ケーブル，難燃性，シリコーンゴム，エチレンプロピレンジエンゴム　　nuclear power plant，fire protection，safety-related cable，frame retardancy，silicone rubber，ethylene propylene diene rubber

要約(英語): Cables used in nuclear power plants are required to be flame retardant as a measure of fire protection. Cables with polymer insulation, such as silicone rubber (SiR) insulated cables, flame-retardant ethylene propylene diene rubber (FR-EPDM) insulated cables and flame-retardant cross-linked polyethylene (FR-XLPE) insulated cables, are commonly used as safety-related low voltage cables in nuclear power plants. This paper describes results of flame-propagation tests conducted in accordance with IEEE Std 383-1974 and IEEE Std 1202-2006, and oxygen index measurement tests conducted in accordance with JIS K 7201-2:2007, which were carried out to investigate the effect of pre-aging on flame retardancy of the cables. The samples employed in the tests were un-aged cables and pre-aged cables by accelerated simultaneous thermal and radiation aging to simulate aging in their service life under normal operating environment in nuclear power plants. In addition, decomposition temperatures were measured by thermogravimetry for pre-aged insulation samples of SiR, FR-EPDM and FR-XLPE to evaluate the results of flame-propagation tests and oxygen index measurement tests. As a result of flame-propagation tests and oxygen index measurement tests, flame retardancy of the cables was not degraded by the pre-aging process of this study. From the thermogravimetry, the significant decrease in decomposition temperature due to pre-aging was not observed.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.137 No.11 （2017） 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: 620-625 p

原稿種別: 特集／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/137/11/137_620/_article/-char/ja/