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http://dx.doi.org/10.6110/KJACR.2017.29.10.538

Numerical Analysis of Flow Distribution inside a Fuel Assembly with Split-type Mixing Vanes for the Development of Regulatory Guideline on the Applicability of CFD Software  

Lee, Gong Hee (Nuclear Safety Research Department, Korea Institute of Nuclear Safety)
Cheong, Ae Ju (Nuclear Safety Research Department, Korea Institute of Nuclear Safety)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.29, no.10, 2017 , pp. 538-550 More about this Journal
Abstract
In a PWR (Pressurized Water Reactor), the appropriate heat removal from the surface of fuel rod bundle is important for ensuring thermal margins and safety. Although many CFD (Computational Fluid Dynamics) software have been used to predict complex flows inside fuel assemblies with mixing vanes, there is no domestic regulatory guideline for the comprehensive evaluation of CFD software. Therefore, from the nuclear regulatory perspective, it is necessary to perform the systematic assessment and prepare the domestic regulatory guideline for checking whether valid CFD software is used for nuclear safety problems. In this study, to provide systematic evaluation and guidance on the applicability of CFD software to the domestic nuclear safety area, the results of the sensitivity analysis for the effect of the discretization scheme accuracy for the convection terms and turbulence models, which are main factors that contribute to the uncertainty in the calculation of the nuclear safety problems, on the prediction performance for the turbulent flow distribution inside the fuel assembly with split-type mixing vanes were explained.
Keywords
Computational fluid dynamics; Mixing vane; Rod bundle; Split-type; Subchannel; Turbulent flow;
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Times Cited By KSCI : 1  (Citation Analysis)
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