Abstract
The TONUS code incorporates both Lumped Parameter (LP) and Computational Fluid Dynamics (CFD) formulations, is jointly developed by the French Atomic Energy Commission (CEA) and the Institute for Radiological Protection and Nuclear Safety (IRSN) for hydrogen risk safety analysis. During the cooperation between CEA and Chinese Atomic Energy Authority (CAEA) for severe accident management associated laboratory, the incorporation of a Chinese recombiner model into the TONUS code was carried out and an analysis was performed with this new recombiner model for the Chinese 300MWe Nuclear Power Plant (CNP300). The analysis of hydrogen issue for the CNP300 was performed with two recombiner models, the standard TONUS and Chinese one using several hypothetical accident scenarios. The obtained results show that the Chinese recombiner model results in a lower hydrogen concentration in CNP300 than the standard TONUS one due to its geometrical structure and high efficiency.
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