Advanced multi-scale modeling and experimental tests on fuel degradation in severe accident conditions, 1-7; Development of solidification model

Sato, Takumi ; Hirata, Naoya*; Oikawa, Katsunari*; Nagae, Yuji ; Kurata, Masaki

Macroscopic segregation of molten core and melted components occurs with slow cooling rate in the accident of Fukushima Daiichi Nuclear Power Plants. The solidification model considering macroscopic segregation of molten core and melted components was developed in order to predict distribution of core elements. In this study, solidification and microscopic segregation were simulated with the Scheil model using thermal properties calculated by Thermo-calc. We estimated segregation behavior of molten core and investigated an influence of cooling conditions on macroscopic segregation.

Language	:	Japanese
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Meeting title	:	日本原子力学会2018年秋の大会
Held date	:	2018/09
Location (city)	:	岡山
Location (country)	:	日本
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Keywords	:	凝固; マクロ偏析; 流体計算力学; 福島第一原子力発電所事故; Fukushima Daiichi Nuclear Power Station Accident
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Article of JAEA R&D Review	:
Cooperating Institute	:	東北大学

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Registration No. : BB20180546
JAEA Abstracts No. :
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