Effects of UO2/Zircaloy-4 Mole Ratios on Reaction of UO2 Fuel with Molten Zircaloy-4.
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概要
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Dissolution of UO<SUB>2</SUB> crucibles by molten Zircaloy-4 (Zry) was investigated in the temperature range of 2, 223-2, 373 K and for specimens having UO<SUB>2</SUB>/Zry mole ratios between 7 and 18.2. <BR>The uranium concentration in the Zry melt rapidly increased during initial reaction time and approached saturated values, depending on reaction temperature and UO<SUB>2</SUB>/Zry mole ratio. <BR>Kinetics of uranium concentration increase in the melt was analyzed based on a natural convection mass transfer model that takes into account the change of contact surface area/melt volume ratio with reaction time. The saturated uranium concentration in the Zry melt was inversely proportional to the UO<SUB>2</SUB>/Zry mole ratio. An empirical correlation of saturated uranium concentration in the Zry melt was obtained as a function of UO<SUB>2</SUB>/Zry mole ratios and reaction temperature. This study of the empirical correlation was intended to estimate maximum UO<SUB>2</SUB> fuel dissolution by molten Zry cladding during severe fuel damage accidents for three different reactor type fuels.
- 一般社団法人 日本原子力学会の論文
著者
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YOON Young
Department of Nuclear Engineering, Korea Advanced Institute of Science and Technology
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Yoon Young
Department of Advanced Technology Fusion (DATF), Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, Korea
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MOK Yong
Department of Nuclear Engineering, Korea Advanced Institute of Science and Technology
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