Simulation of the key phenomena in nuclear reactor two-phase flow and severe accident with particle method
This study aims to address important and difficult problems in the thermal safety field,such as the boiling and two-phase flow of nuclear reactor coolant and the migration behavior of molten materials during severe accidents.A high-precision solution technique was proposed using the moving particle semi-implicit method.A two-phase flow particle model was established to capture the complex interface between phases with a large density ratio and simulate the vapor-liquid phase transition.Specifically,a particle method model was developed for analyzing the processes of oxidation eutectic,high-temperature creep,remelting-solidification,and the relocation of degraded nuclear reactor cores during severe accidents.To this end,a complex process analysis software platform PANDA was developed based on the particle method for investigating key thermal safety phenomena in nuclear reactors;thus,the accurate simulation of complex phenomena such as the two-phase flow bubble dynamics of nuclear reactor coolant and severe accidents was effectively realized.
万方数据
维普
