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Quench front progression in a superheated porous medium: experimental analysis and model development

Bachrata, Andrea and Fichot, Florian and Repetto, Georges and Quintard, Michel and Fleurot, J. Quench front progression in a superheated porous medium: experimental analysis and model development. In: NURETH 14 2011 14th International Topical Meeting on Nuclear Reactor Thermal Hydraulics , 25-30 Sept 2011, Toronto, Canada .

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Abstract

In case of severe accident in a nuclear reactor, the fuel rods may be highly damaged and oxidized and finally collapse to form a debris bed. Removal of decay heat from a debris bed is a challenging issue because of the difficulty for water to flow inside. Currently, IRSN has started experimental program PEARL with two experimental facilities PRELUDE and PEARL, to investigate the reflood process at high temperature, for various particle sizes. On the basis of PRELUDE experimental results, the thermal hydraulic features of the quench front have been analysed and the intensity of heat transfers was estimated. From a selection of experimental results, a reflooding model was improved and validated. The model is implemented in the code ICARE-CATHARE developed by IRSN which is used for severe accident reactor analysis.

Item Type:Conference or Workshop Item (UNSPECIFIED)
Additional Information:The original PDF of the article can be found at NURETH 14 2011 website : http://nureth14.org/
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > Institut de Protection et de Sûreté Nucléaire - IPSN (FRANCE)
French research institutions > Institut de Radioprotection et de Sûreté Nucléaire - IRSN (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
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Deposited By:Catherine THURIOT

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