Numerical Simulation of Effect of Different Hydrogen Production Rates on Hydrogen Distribution within Containment

Flow characteristics of hydrogen gas in the containment is preliminarily studied by CFD code CFX. The result suggests that the basic trend of the hydrogen distribution is the same at various hydrogen release rates, and effects of different hydrogen production mainly on the hydrogen distribution are the different spiral formed when the hydrogen moves to the dome of the containment, the hydrogen kinetic energy would be lower and distribution area are larger and evener for the sequence with lower hydrogen release rate, and the hydrogen kinetic energy is higher and distribution area is more centralized in the higher hydrogen production rate accident.