摘要
In the Lead-Based fast reactor core,the fuel rods are arranged in a triangle grid in the fuel assemblies and wrapped by metal wire.The coolant is forced to flow in transverse direction by the wire spacers,which makes the temperature distribution more uniform.The cross flow produced by wire spacers also increases the complexity of the flow distribution.How to describe the flow and temperature distribution accurately becomes the difficulty and emphasis for the research on the wire wrapped fuel assemblies.
