Experimental and Numerical Investigation on the Hydrogen Behavior in Containment under Severe Accident

Liu Tong; Ma Le; Gong Houjun; Zan Yuanfeng

doi:10.13832/j.jnpe.2025.S1.0052

Volume 46 Issue S1

Jul. 2025

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Liu Tong, Ma Le, Gong Houjun, Zan Yuanfeng. Experimental and Numerical Investigation on the Hydrogen Behavior in Containment under Severe Accident[J]. Nuclear Power Engineering, 2025, 46(S1): 52-57. doi: 10.13832/j.jnpe.2025.S1.0052

Citation:

Liu Tong, Ma Le, Gong Houjun, Zan Yuanfeng. Experimental and Numerical Investigation on the Hydrogen Behavior in Containment under Severe Accident[J]. Nuclear Power Engineering, 2025, 46(S1): 52-57. doi: 10.13832/j.jnpe.2025.S1.0052

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Experimental and Numerical Investigation on the Hydrogen Behavior in Containment under Severe Accident

doi: 10.13832/j.jnpe.2025.S1.0052

National Key Laboratory of Nuclear Reactor Technology, Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2024-11-10
Rev Recd Date: 2025-03-26
Publish Date: 2025-07-09

Abstract

Abstract

During the loss of coolant accident (LOCA) in a pressurized water reactor, a large amount of steam and hydrogen released could pose a threat to the containment integrity. Therefore, it is necessary to conduct an in-depth study on the pressure response characteristics and hydrogen behavior in the containment. This study investigates the LOCA blowdownand hydrogen release processes through experimental and numerical simulations. The high-temperature and high-pressure working fluid was spewed to the containment simulator throughthe pressurizer. A concentration measurement system was employed to measure the evolution of the steam and helium volume concentration in the containment simulator. Furthermore, the three-dimensional computational fluid dynamics code Gasflow-MPI was utilized to simulate the experimental process. Base on the experimental and numerical simulation results, the hydrogen distribution in the containment simulator was further analyzed. The experimental and numerical simulation results show that there is no obvious temperature stratification in the containment simulator, but the helium volume concentration at the top of the simulator is higher than that at the bottom with an obvious stratification.
- Severe accidents,
- Containment,
- Hydrogen behavior,
- Numerical simulation

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References(10)

References

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