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자료유형
학술저널
저자정보
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제50권 제1호
발행연도
2018.1
수록면
54 - 67 (14page)

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There have been recent efforts to establish methods for high-fidelity and multi-physics simulation withcoupled thermalehydraulic (T/H) and neutronics codes for the entire core of a light water reactor underaccident conditions. Considering the computing power necessary for a pin-by-pin analysis of the entirecore, subchannel-scale T/H analysis is considered appropriate to achieve acceptable accuracy in anoptimal computational time. In the present study, the applicability of in-house code CUPID of the KoreaAtomic Energy Research Institute was extended to the subchannel-scale T/H analysis. CUPID is acomponent-scale T/H analysis code, which uses three-dimensional two-fluid models with variousclosure models and incorporates a highly parallelized numerical solver. In this study, key modelsrequired for a subchannel-scale T/H analysis were implemented in CUPID. Afterward, the code wasvalidated against four subchannel experiments under unheated and heated single-phase incompressibleflow conditions. Thereafter, a subchannel-scale T/H analysis of the entire core for an Advanced PowerReactor 1400 reactor core was carried out. For the high-fidelity simulation, detailed geometrical featuresand individual rod power distributions were considered in this demonstration. In this study, CUPIDshows its capability of reproducing key phenomena in a subchannel and dealing with the subchannelscalewhole core T/H analysis.

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