| Title |
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 |
| Authors |
Gong Hee Lee ; Ae Ju Cheong |
| DOI |
http://dx.doi.org/10.6110/KJACR.2017.29.10.538 |
| Keywords |
전산유체역학 ; 혼합날개 ; 봉다발 ; 분할 형태 ; 부수로 ; 난류 유동 Computational fluid dynamics ; Mixing vane ; Rod bundle ; Split-type ; Subchannel ; Turbulent flow |
| 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. |