The Research Of Passive Autocatalytic Hydrogen Recombiner CFD Numerical Simulation

With the continuous overheating of the core,the continuous generation of water vapor or hydrogen will increase pressure on the reactor coolant system.The combustion of hydrogen and even explosion will pose a threat to the containment.In recent years,a series of experiments have been carried out in the world,in order to have a better understanding of the behavior of hydrogen in the containment.Through these experiments,a certain consensus has been reached in the combustion and distribution of hydrogen,and some measures to reduce the risk of hydrogen have been formed.Passive hydrogen recombiner is one of the most widely used measures at present,and it has been successfully applied in Germany,France,Belgium,Canada and other nuclear power plants.According to the structure and principle of passive hydrogen recombiner,based on the mature CFD fluid calculation software FLUENT,independently develop numerical simulation model of passive hydrogen recombiner.Under severe accidents,the gas composition and distribution change with time and space in the containment,especially hydrogen flow's physical parameters of local 3D.The summary of the passive hydrogen recombiner in nuclear power plant layout principle,for practical application,provide a theoretical basis: the influence of installation position on the hydrogen removal efficiency,the influence of local high temperature on the surrounding wall.