Novel Model of Concrete Decomposition and Melting in during MCCI in an LWR Concrete Pit during a Severe Accident

The paper considers refined approaches to solving two problems of modeling MCCI: (1) a thermodynamical model of chemical reactions of the concrete components with the melt was constructed, as well as a model of concrete decomposition including universal procedures for calculating the heat capacity a...

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Veröffentlicht in:High temperature 2022-12, Vol.60 (6), p.838-847
Hauptverfasser: Ozrin, V. D., Filippov, A. S.
Format: Artikel
Sprache:eng
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Zusammenfassung:The paper considers refined approaches to solving two problems of modeling MCCI: (1) a thermodynamical model of chemical reactions of the concrete components with the melt was constructed, as well as a model of concrete decomposition including universal procedures for calculating the heat capacity and density of concrete, independently on its type; (2) a self-consistent, cost-effective model of concrete ablation progression was constructed, taking into account heating of the concrete; this model numerically solves the heat conduction equation on an adaptive grid. The models are described and verified.
ISSN:0018-151X
1608-3156
DOI:10.1134/S0018151X22050236