Study on Influence of Isolation Condenser in Fukushima Daiichi Nuclear Plant Unit 1 Accident with TRAC-BF1 Code

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  • TAMAI Hidesada
    Tokai Research and Development Center, Japan Atomic Energy Agency
  • AKIMOTO Hajime
    Tokai Research and Development Center, Japan Atomic Energy Agency
  • TAKASE Kazuyuki
    Tokai Research and Development Center, Japan Atomic Energy Agency

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Other Title
  • TRAC-BF1 を用いた福島第一原発 1 号機の事故における非常用復水器の影響に関する検討
  • 福島第一原子力発電所事故関連論文 TRAC-BF1を用いた福島第一原発1号機の事故における非常用復水器の影響に関する検討
  • フクシマ ダイイチ ゲンシリョク ハツデンショ ジコ カンレン ロンブン TRAC-BF1 オ モチイタ フクシマ ダイイチ ゲンパツ 1ゴウキ ノ ジコ ニ オケル ヒジョウヨウ フクスイキ ノ エイキョウ ニ カンスル ケントウ

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  The Fukushima Daiichi Nuclear Plant Unit 1 accident was investigated with the TRAC-BF1 code in order to confirm the effect of an isolation condenser (IC) on core cooling analytically. The analysis shows that the formation of two-phase natural-circulation flow is a key phenomenon for core cooling. Therefore, it is too late to cool fuel rods, once the core is heated up because of the lack of coolant. It also shows that the early start-up of the IC is essential for avoiding the core meltdown under station blackout conditions.<br>

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