Preliminary Research on Nuclear Reactor Thermal-Hydraulic Multi-scale Coupled Simulation

Recently,the nuclear safety analysis more and more emphasize on the fine and realistic analy-sis. Thus thermal-hydraulic multi-scale coupled simulation approach,including the system,component and local scales,has been proposed in some countries. And the three scales can be coupled together effectively through one coupling method. Based on the similar idea,this paper makes a multi-scale coupling framework of RELAP5,COBRA4 and CFX. Verification of current coupled code has been carried out by testing calcula-tion of two simplified problems.