S083013 Research on hydrogen ventilation of BWR reactor building in a severe accident : Suggestion of lumped parameter system to predict hydrogen density

Abstract

An evaluation method to predict hydrogen density in BWR reactor buildings in case of severe accident is proposed. Lumped parameter system is adopted assuming the uniform distribution of hydrogen density. By the proposed method, we can obtain the evaluation result in a moment. The results agree well with the CFD calculations in both the steady state and the transient evaluation. Therefore we can substitute this method for CFD analysis, which needs a lot of computational time.