Numerical Analysis of OECD/NEA HYMERES Project Benchmark Tests Using CABARET-SC1 CFD Code

Anton A. Kanaev; Vyacheslav Yu. Glotov

doi:10.14529/jsfi240308

Authors

Anton A. Kanaev Nuclear Safety Institute (IBRAE), Moscow, Russian Federation
Vyacheslav Yu. Glotov Nuclear Safety Institute (IBRAE), Moscow, Russian Federation

DOI:

https://doi.org/10.14529/jsfi240308

Keywords:

CFD modeling, NPP hydrogen safety, ILES

Abstract

The benchmark tests carried out within the OECD/NEA HYMERES (HYdrogen Mitigation Experiments for Reactor Safety) international project allowed to assess the capability of computational tools and to develop methodology for improving the modelling of complex safety issues relevant for the analysis and mitigation of a severe accident leading to hydrogen release into a nuclear plant containment. The paper presents the results of numerical simulation of two OECD/NEA HYMERES benchmark tests using CABARET-SC1 code. The code is based on the eddy resolving CABARET technique, which allows implicit modeling of the subgrid turbulence scales without using tuning parameters (ILES approximation). The absence of tuning parameters in the numerical approach allowed evaluating the influence of a separate physical phenomenon of radiative heat transfer. The influence of the mesh resolution in flow regions with complex geometries and the use of a porous medium model was also investigated.

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