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Experimental investigation of spray cooling behavior in 4$$times$$4 simulated fuel bundle

4$$times$$4模擬燃料集合体によるスプレイ冷却試験

永武 拓 ; 柴田 光彦 ; 吉田 啓之  ; 根本 義之  ; 加治 芳行  

Nagatake, Taku; Shibata, Mitsuhiko; Yoshida, Hiroyuki; Nemoto, Yoshiyuki; Kaji, Yoshiyuki

福島第一原子力発電所事故において、使用済み燃料プールの冷却機能喪失により使用済み燃料の破損が懸念された。事故後、使用済燃料プールシビアアクシデント時において使用済み燃料プールの冷却に関する対応が求められている。この対策として可搬式スプレイを用いた冷却が考案されており、可搬式スプレイによる冷却性能評価が必要となっている。本報では、スプレイ冷却に関する知見及び冷却過程データ取得のための試験として、4$$times$$4模擬燃料集合体を用いたスプレイ冷却における集合体内温度分布データの取得を実施した結果について報告する。

In Fukushima Daiichi Nuclear Power Plant accident, failure of cooling system for spent fuel pool occurred and there was a concern that the spent fuels were damaged. Then a safety measures for SFP cooling in severe accident condition is required. As a countermeasure for SFP severe accident, it is considered that a portable spray is used for SFP cooling in such condition. In this research project, the numerical simulation methods have been developed in order to evaluate the applicability of portable spray system for cooling SFPs. And experiments were also performed in order to get a knowledge of spray cooling phenomena and validation data for the numerical simulation methods. As one of the experiments, a cooling experiment by using 4$$times$$4 simulated fuel assembly were performed and temperature distribution during spray cooling process were measured. In this paper, the results of a cooling experiment are reported.

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分野:Nuclear Science & Technology

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