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Communication Dans Un Congrès Année : 2019

Phenomenological study of the ablation by melting of a solid impinged on by a liquid jet applications to ASTRID's core-catcher

Résumé

In the design of every new nuclear reactor, the possibility of a core meltdown is studied. In the case of ASTRID fast breeder a core-catcher will be placed beneath the core. To ensure that it performs as planed its ablation by a liquid jet of corium is investigated. To do so, an experimental set up was designed where the ablation of a solid by a liquid jet is studied using transparent ice as solid and water as liquid. The aim is to visualize the evolution of the cavity shape, and the ablation rate, during the ablation process. We observed that the cavity first assumes a conical shape, and the ablation rate stays constant. Then the cavity shape changes, and the ablation rate decreases with time. The aims to clarify the influence of the temperature, diameter and speed of the jet are studied as well as the inclination of the solid block on the ablation rate and mechanisms. A correlation giving the Nusselt number as a function of the Reynolds and the Prandtl number was obtained for our system. This will be used as a base to identify and model the mechanisms at stake. Introduction:
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Dates et versions

hal-02433934 , version 1 (09-01-2020)

Identifiants

  • HAL Id : hal-02433934 , version 1

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Alexandre Lecoanet, Nicolas Rimbert, Michel Gradeck, Frédéric Payot. Phenomenological study of the ablation by melting of a solid impinged on by a liquid jet applications to ASTRID's core-catcher. 10th International Conference on Multiphase Flow ICMF 2019, May 2019, Rio de Janeiro, Brazil. ⟨hal-02433934⟩
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