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シビアアクシデント時の燃料破損・溶融過程解析手法の高度化,2-4; UO$$_{2}$$-Zr高温反応試験

Advanced multi-scale modeling and experimental tests on fuel degradation in severe accident conditions, 2-4; High temperature interaction between UO$$_{2}$$ and Zr

白数 訓子  ; 鈴木 晶大*; 永江 勇二 ; 倉田 正輝 

Shirasu, Noriko; Suzuki, Akihiro*; Nagae, Yuji; Kurata, Masaki

ジルカロイ被覆管とUO$$_{2}$$燃料の高温における溶融過程解析モデルの高度化に資するため、ZrとUO$$_{2}$$の高温反応試験を実施した。UO$$_{2}$$るつぼに、Zr試料を装荷し1900$$^{circ}$$C近傍で加熱を行い、生成した反応相の成長状況や溶融状態、組織変化の観察を行い、溶融メカニズムをより明確なものとした。

The high temperature interaction tests between UO$$_{2}$$ and Zr were performed at around 2173 K in stream of Ar, to make clear the UO$$_{2}$$ and Zircaloy cladding interaction and the mechanism of degradation. After the heat-treatment, the samples were subjected to surface microanalysis. The mechanism of fuel degradation was more clarified.

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