SEINA: A two-dimensional steam explosion integrated analysis code

Wu Liangpeng; Sun Ruiyu; Chen Ronghua; Tian Wenxi; Qiu Suizheng; Su G.H.

doi:10.1016/j.net.2022.04.025

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자료유형: 학술저널

저자정보: Wu Liangpeng (School of Nuclear Science and Technology, Shaanxi Key Laboratory of Advanced Nuclear Energy and Tec) Sun Ruiyu (School of Nuclear Science and Technology, Shaanxi Key Laboratory of Advanced Nuclear Energy and Tec) Chen Ronghua (School of Nuclear Science and Technology Shaanxi Key Laboratory of Advanced Nuclear Energy and Tech) Tian Wenxi (School of Nuclear Science and Technology Shaanxi Key Laboratory of Advanced Nuclear Energy and Tech) Qiu Suizheng (School of Nuclear Science and Technology Shaanxi Key Laboratory of Advanced Nuclear Energy and Tech) Su G.H. (School of Nuclear Science and Technology, Shaanxi Key Laboratory of Advanced Nuclear Energy and Tec)

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제54권 제10호

발행연도: 2022.10

수록면: 3,909 - 3,918 (10page)

DOI: 10.1016/j.net.2022.04.025

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In the event of a severe accident, the reactor core may melt due to insufficient cooling. the hightemperature core melt will have a strong interaction (FCI) with the coolant, which may lead to steam explosion. Steam explosion would pose a serious threat to the safety of the reactors. Therefore, the study of steam explosion is of great significance to the assessment of severe accidents in nuclear reactors. This research focuses on the development of a two-dimensional steam explosion integrated analysis code called SEINA. Based on the semi-implicit Euler scheme, the three-phase field was considered in this code. Besides, the influence of evaporation drag of melt and the influence of solidified shell during the process of melt droplet fragmentation were also considered. The code was simulated and validated by FARO L-14 and KROTOS KS-2 experiments. The calculation results of SEINA code are in good agreement with the experimental results, and the results show that if the effects of evaporation drag and melt solidification shell are considered, the FCI process can be described more accurately. Therefore, it is proved that SEINA has the potential to be a powerful and effective tool for the analysis of steam explosions in nuclear reactors.

#Severe accidents #FCI #Steam explosion #Numerical simulation

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