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논문 기본 정보

자료유형
학술저널
저자정보
Abe Satoshi (Thermohydraulic Safety Research Group Nuclear Safety Research Center Japan Atomic Energy Agency 2-4 Shirakata Tokai) Sibamoto Yasuteru (Thermohydraulic Safety Research Group Nuclear Safety Research Center Japan Atomic Energy Agency 2-4 Shirakata Tokai)
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제55권 제5호
발행연도
2023.5
수록면
1,742 - 1,756 (15page)
DOI
10.1016/j.net.2023.01.019

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The hydrogen behavior in a nuclear containment vessel is a significant issue when discussing the po tential of hydrogen combustion during a severe accident. After the Fukushima-Daiichi accident in Japan, we have investigated in-depth the hydrogen transport mechanisms by utilizing experimental and nu merical approaches. Computational fluid dynamics is a powerful tool for better understanding the transport behavior of gas mixtures, including hydrogen. This paper describes a Large-eddy simulation of gas mixing driven by a high-buoyancy flow. We focused on the interaction behavior of heat and mass transfers driven by the horizontal high-buoyant flow during density stratification. For validation, the experimental data of the Containment InteGral effects Measurement Apparatus (CIGMA) facility were used. With a high-power heater for the gas-injection line in the CIGMA facility, a high-temperature flow of approximately 390 C was injected into the test vessel. By using the CIGMA facility, we can extend the experimental data to the high-temperature region. The phenomenological discussion in this paper helps understand the heat and mass transfer induced by the high-buoyancy flow in the containment vessel during a severe accident.

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