AP1000 containment accident transient analysis using MELCOR

XIAO Hong; CAO Zhiwei; FENG Yingjie; YANG Zhiyi; ZHU Jianmin

doi:10.16511/j.cnki.qhdxxb.2018.26.041

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Journal of Tsinghua University(Science and Technology) ›› 2018, Vol. 58 ›› Issue (11) : 1029-1036. DOI: 10.16511/j.cnki.qhdxxb.2018.26.041

NUCLEAR ENERGY AND NEW ENERGY

AP1000 containment accident transient analysis using MELCOR

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Abstract

The AP1000 containment and passive containment cooling system (PCS) were modeled using MELCOR 2.1 and SNAP with detailed 3D modeling to analyze the convective heat transfer, condensation and film evaporation for containment cooling. The film tracking model was used to simulate the PCS characteristics. The containment thermal hydraulic transients during a LOCA were analyzed to predict the main parameters at each stage after the accident. The effects of the film coverage fraction and the film coverage time were also studied. The results show that the MELCOR program can accurately simulate the thermal hydraulics of the AP1000 passive containment cooling system. The results provide a reference for analyzing the characteristics of the nuclear power plant containment system. This study also independently verifies the safety of this reactor design by using an analysis code that is totally different from the design codes.

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transient / condensation heat transfer / passive containment cooling / film tracking

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XIAO Hong, CAO Zhiwei, FENG Yingjie, YANG Zhiyi, ZHU Jianmin. AP1000 containment accident transient analysis using MELCOR[J]. Journal of Tsinghua University(Science and Technology). 2018, 58(11): 1029-1036 https://doi.org/10.16511/j.cnki.qhdxxb.2018.26.041

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