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Theses

L'étalement du Corium : Hydrodynamique, Rhéologie et Solidification d'un Bain d'Oxydes à Haute Température

Christophe Journeau 1
1 LEAG - Laboratoire d'Etudes et d'Expérimentation pour les Accidents Graves
SMTA - Service Mesures et modélisation des Transferts et des Accidents graves : DEN/DTN
Abstract : In the hypothesis of a nuclear reactor severe accident, the core could melt and form a hightemperature (2000-3000 K) mixture called corium. In the hypothesis of vessel rupture, this corium would spread in the reactor pit and adjacent rooms ? as occurred in Chernobyl ? or in a dedicated core-catcher ? as in the new European Pressurized reactor, EPR. This thesis is dedicated to the experimental study of corium spreading, especially with the prototypic corium material experiments performed in the VULCANO facility at CEA Cadarache. The first step in analyzing these tests consists in interpretatng the material analyses, with the help of thermodynamic modelling of corium solidification. Knowing for each temperature the phase repartition and composition, physical properties can be estimated. Spreading termination is controlled by corium rheological properties in the solidification range, which leads to studying them in detail. The hydrodynamical, rheological and solidification aspects of corium spreading are taken into account in models and computer codes which have been validated against these tests and enable the assessment of the EPR spreading core-catcher concept.
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Submitted on : Tuesday, December 2, 2008 - 3:06:22 PM
Last modification on : Tuesday, April 28, 2020 - 11:28:11 AM
Document(s) archivé(s) le : Monday, June 7, 2010 - 8:29:13 PM

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  • HAL Id : tel-00343671, version 1

Citation

Christophe Journeau. L'étalement du Corium : Hydrodynamique, Rhéologie et Solidification d'un Bain d'Oxydes à Haute Température. Energie électrique. Université d'Orléans, 2006. Français. ⟨tel-00343671⟩

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