During severe accident oxidation of the metallic components of the reactor core and the core-concrete interaction will produce hydrogen which may threaten the integrity of the containment. It is important to predict hydrogen transport and mixing in the containment, in order to determine whether the mixture can locally reach flammability limits, and install the hydrogen mitigation devices at a reasonable and suitable position. Several turbulence models in FLUENT and GASFLOW were adopted in this paper to investigate hydrogen transport and mixing in the containment, and the results were compared. The study indicates that RNG k–ε model can obtain better simulation in parameter fluctuation, velocity field, and hydrogen concentration field than the other models’. The results calculated by algebraic model in GASFLOW are largely different from the other results in the simulation of mass diffusion, momentum diffusion, and parameter fluctuation. The results of k–ε model in GASFLOW have the similar trend as the results of FLUENT in velocity field and concentration field. Three hydrogen mitigation measures were also studied in a simple closed room using the code GASFLOW. The results indicate that the combination of recombiners and igniters is a safe and effective way to reduce the risk of hydrogen combustion.
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14th International Conference on Nuclear Engineering
July 17–20, 2006
Miami, Florida, USA
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
0-7918-4245-2
PROCEEDINGS PAPER
Investigations on Hydrogen Distribution and Mitigation Measures in the Containment Under Severe Accident
Jian-Jun Xiao,
Jian-Jun Xiao
Tsinghua University, Beijing, China
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Zhi-Wei Zhou,
Zhi-Wei Zhou
Tsinghua University, Beijing, China
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Xing-Qing Jing
Xing-Qing Jing
Tsinghua University, Beijing, China
Search for other works by this author on:
Jian-Jun Xiao
Tsinghua University, Beijing, China
Zhi-Wei Zhou
Tsinghua University, Beijing, China
Xing-Qing Jing
Tsinghua University, Beijing, China
Paper No:
ICONE14-89010, pp. 441-453; 13 pages
Published Online:
September 17, 2008
Citation
Xiao, J, Zhou, Z, & Jing, X. "Investigations on Hydrogen Distribution and Mitigation Measures in the Containment Under Severe Accident." Proceedings of the 14th International Conference on Nuclear Engineering. Volume 4: Computational Fluid Dynamics, Neutronics Methods and Coupled Codes; Student Paper Competition. Miami, Florida, USA. July 17–20, 2006. pp. 441-453. ASME. https://doi.org/10.1115/ICONE14-89010
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