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Numerical Analysis for Hydrogen Flame Acceleration during a Severe Accident in the APR1400 Containment Using a Multi-Dimensional Hydrogen Analysis System

Author

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  • Hyung Seok Kang

    (Korea Atomic Energy Research Institute, Daejeon 34057, Korea)

  • Jongtae Kim

    (Korea Atomic Energy Research Institute, Daejeon 34057, Korea)

  • Seong Wan Hong

    (Korea Atomic Energy Research Institute, Daejeon 34057, Korea)

  • Sang Baik Kim

    (Korea Atomic Energy Research Institute, Daejeon 34057, Korea)

Abstract

Korea Atomic Energy Research Institute (KAERI) established a multi-dimensional hydrogen analysis system to evaluate hydrogen release, distribution, and combustion in the containment of a Nuclear Power Plant (NPP), using MAAP, GASFLOW, and COM3D. In particular, KAERI developed an analysis methodology for a hydrogen flame acceleration, on the basis of the COM3D validation results against measured data of the hydrogen combustion tests in the ENACCEF and THAI facilities. The proposed analysis methodology accurately predicted the peak overpressure with an error range of approximately ±10%, using the Kawanabe model used for a turbulent flame speed in the COM3D. KAERI performed a hydrogen flame acceleration analysis using the multi-dimensional hydrogen analysis system for a severe accident initiated by a station blackout (SBO), under the assumption of 100% metal–water reaction in the Reactor Pressure Vessel (RPV), to evaluate an overpressure buildup in the containment of the Advanced Power Reactor 1400 MWe (APR1400). The magnitude of the overpressure buildup in the APR1400 containment might be used as a criterion to judge whether the containment integrity is maintained or not, when the hydrogen combustion occurs during a severe accident. The COM3D calculation results using the established analysis methodology showed that the calculated peak pressure in the containment was lower than the fracture pressure of the APR1400 containment. This calculation result might have resulted from a large air volume of the containment, a reduced hydrogen concentration owing to passive auto-catalytic recombiners installed in the containment during the hydrogen release from the RPV, and a lot of stem presence during the hydrogen combustion period in the containment. Therefore, we found that the current design of the APR1400 containment maintained its integrity when the flame acceleration occurred during the severe accident initiated by the SBO accident.

Suggested Citation

  • Hyung Seok Kang & Jongtae Kim & Seong Wan Hong & Sang Baik Kim, 2020. "Numerical Analysis for Hydrogen Flame Acceleration during a Severe Accident in the APR1400 Containment Using a Multi-Dimensional Hydrogen Analysis System," Energies, MDPI, vol. 13(22), pages 1-18, November.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:22:p:6151-:d:449819
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    Citations

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    Cited by:

    1. Hyung-Seok Kang & Sang-Min Kim & Jongtae Kim, 2022. "Safety Issues of a Hydrogen Refueling Station and a Prediction for an Overpressure Reduction by a Barrier Using OpenFOAM Software for an SRI Explosion Test in an Open Space," Energies, MDPI, vol. 15(20), pages 1-21, October.
    2. Mohammad Hosein Shamsadin Saeid & Maryam Ghodrat, 2022. "Numerical Simulation of the Influence of Hydrogen Concentration on Detonation Diffraction Mechanism," Energies, MDPI, vol. 15(22), pages 1-25, November.
    3. Jianhui Wu & Jingen Chen & Chunyan Zou & Xiaoxiao Li, 2022. "Accident Modeling and Analysis of Nuclear Reactors," Energies, MDPI, vol. 15(16), pages 1-3, August.

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