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軽水炉シビアアクシデント影響の更なる高精度予測を目指して

Aiming at further improvement of prediction for consequences of LWR severe accidents

日高 昭秀   

Hidaka, Akihide

軽水炉シビアアクシデント時の炉心状態を模擬するため、世界最高温度,圧力条件を達成する実験装置VEGAを設計,製作し、雰囲気圧力が照射済燃料からの放射性物質の放出挙動に及ぼす影響を初めて実験的に定量化した。また、その結果に基づいて、圧力の影響を説明するモデルを提案した。これらの成果に対し、第35回(平成14年度)日本原子力学会賞論文賞が授与された。本稿では、受賞対象となった研究との出会い,思い入れ,苦労した点,今後の展開等について紹介する。

In order to investigate the radionuclides release from irradiated fuel under severe accident conditions of LWR, VEGA experimental facility that realizes the highest temperature and pressure conditions was designed and constructed at JAERI. The effect of ambient pressure on radionuclides release was uniquely quantified by using this facility. A model that explains the observed pressure effect was also proposed based on the experimental results. For this effort, the atomic energy society of Japan gave us the preeminent monograph award in FY 2002. This paper describes my encounter with the research awarded this time, fascination of this research, hard-worked points, future plans and so on.

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