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research-article

CFD Simulation of Deflagration-to-Detonation Transition in a Full-Scale Konvoi-Type Pressurized Water Reactor

[+] Author and Article Information
Josef Hasslberger

Lehrstuhl für Thermodynamik Technische Universität München 85748 Garching, Germany
hasslberger@td.mw.tum.de

Peter Katzy

Lehrstuhl für Thermodynamik Technische Universität München 85748 Garching, Germany
katzy@td.mw.tum.de

Lorenz R. Boeck

Lehrstuhl für Thermodynamik Technische Universität München 85748 Garching, Germany
boeck@td.mw.tum.de

Thomas Sattelmayer

Lehrstuhl für Thermodynamik Technische Universität München 85748 Garching, Germany
sattelmayer@td.mw.tum.de

1Corresponding author.

ASME doi:10.1115/1.4037094 History: Received September 13, 2016; Revised June 14, 2017

Abstract

For the purpose of nuclear safety analysis, a reactive flow solver has been developed to determine the hazardous potential of large-scale hydrogen explosions. Without using empirical transition criteria, the whole combustion process including Deflagration-to-Detonation Transition (DDT) is computed within a single solver framework. In this paper we present massively parallelized three-dimensional explosion simulations in a full-scale pressurized water reactor of the Konvoi type. Several generic DDT scenarios in globally lean hydrogen-air mixtures are examined to assess the importance of different input parameters. It is demonstrated that the explosion process is highly sensitive to mixture composition, ignition location and thermodynamic initial conditions. Pressure loads on the confining structure show a profoundly dynamic behavior depending on the position in the containment. Computational cost can effectively be reduced through adaptive mesh refinement.

Copyright (c) 2017 by ASME
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