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常在細菌による模擬燃料デブリの溶解

Dissolution of fuel debris simulants by common bacteria

Liu, J. ; 土津田 雄馬; 北垣 徹  ; 高野 公秀 ; 香西 直文   ; 大貫 敏彦

Liu, J.; Dotsuta, Yuma; Kitagaki, Toru; Takano, Masahide; Kozai, Naofumi; Onuki, Toshihiko

福島第一原子力発電所の廃止措置に向けては、微生物による燃料デブリや構造材の経年変化リスク評価の観点から、微生物が燃料デブリの溶解へ与える影響を把握しておく必要がある。本研究では、液体培地に模擬燃料デブリ(UO$$_{2}$$/Fe(0))と自然に広く存在する細菌を静置し経時変化を調べた。実験後の分析結果から、本実験の条件においては細菌により燃料デブリの溶解が促進されることを確認した。

For the decommissioning of the Fukushima Daiichi Nuclear Power Plant, it is necessary to understand the influence of microorganisms on the dissolution of fuel debris from the viewpoint of risk assessment of fuel debris. In this study, fuel debris simulant (UO$$_{2}$$/Fe(0)) was exposed to the bacteria that widely exist in nature to understand their changes over time. From the analysis results, it was confirmed that the dissolution of fuel debris was enhanced by the bacteria under the conditions of this experiment.

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