Numerical analysis of hydrogen generation in a BWR during a severe accident

► Contribution to understanding the phenomena of progression of the nuclear core damage. ► Understanding the oxidation fuel rods and claddings dealing with hydrogen generation. ► Know the behavior of temporal hydrogen concentration and temperatures profiles of BWR. ► Effective coefficients of moment...

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Bibliographic Details
Published in:Chemical engineering research & design 2013-04, Vol.91 (4), p.614-624
Main Authors: Valdés-Parada, F.J., Romero-Paredes, H., Espinosa-Paredes, G.
Format: Article
Language:English
Subjects:
Accident analysis
Accidents
Assembly
Boiling water reactors
BWR
Evolution
Hydrogen generation
Mathematical analysis
Mathematical models
Nuclear severe accident
Numerical analysis
Reactor shutdown, heat generation
Temperature profiles
Zircaloy oxidation
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Summary:► Contribution to understanding the phenomena of progression of the nuclear core damage. ► Understanding the oxidation fuel rods and claddings dealing with hydrogen generation. ► Know the behavior of temporal hydrogen concentration and temperatures profiles of BWR. ► Effective coefficients of momentum, heat and mass transport equations were calculated. The aim of this work is to study the behavior of the temporal evolution of the distributions of the hydrogen concentration and temperatures profiles in the core of the boiling water reactor (BWR) during a severe accident. The core of the BWR is considered as an effective medium where the fuel assembly in the core consists of arrays of in-line fuel rod. The governing effective-medium equations for momentum, heat and mass transfer in terms of effective transport coefficients that capture the essential features of the in-line rods assembly were computed using CFD method. The dependence of the evolution of the dimensionless hydrogen concentration and temperatures profiles with Péclet and Biot numbers show the ability of the effective medium for accurately describing the transport phenomena for BWR during severe accident.
ISSN:0263-8762
DOI:10.1016/j.cherd.2013.02.012