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CFD Analysis of the Erosion of a Light Gas Stratification by Means of a Hot Air Jet in the MiniPanda Facility

DOI: 10.1615/THMT-18.790
pages 745-756

A. Attavino
Environment and Applied Fluid Dynamics Department, von Karman Institute for Fluid Dynamics, Waterloosesteenweg 72, B-1640 Sint-Genesius-Rode, Belgium

L. Koloszar
Environment and Applied Fluid Dynamics Department, von Karman Institute for Fluid Dynamics, Waterloosesteenweg 72, B-1640 Sint-Genesius-Rode, Belgium

M. Adorni
BelV, Rue Walcourt 148, 1070 Brussels, Belgium

Philippe Planquart
Environment and Applied Fluid Dynamics Department, von Karman Institute for Fluid Dynamics, Waterloosesteenweg 72, B-1640 Sint-Genesius-Rode, Belgium

Abstrakt

Following the Fukushima-Daichii accident, many countries decided to strengthen the safety systems of their nuclear power plants in order to increase the capabilities of managing severe nuclear accidents. To achieve this goal detailed analysis of postulated design and beyond-design-basis accidents is essential. The main tools available for the analysis of these complex scenarios are Advanced Lumped Parameters (LP) and Computational Fluid Dynamics (CFD) codes. Currently, the most limiting factor in the application of these tools is their validation. This activity is performed in support of the development and validation of a CFD model, built in the numerical environment of OpenFOAM, for hydrogen behaviour in the containment of Light Water Reactors. For validation purpose, numerical simulations of the erosion of a light gas stratification by means of a hot air jet have been performed, and results of the simulations were analysed and compared against experimental results obtained by Rittherath et al. in the MiniPanda facility [2]. Two different scenarios have been considered, each characterized by a different value of the mass flow rate of the jet used to erode the stratification.

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