Numerical Analysis of Flow Skirt Influence on Core Inlet Flow Distribution

The core inlet flow mal-distribution could lead to a local peak temperature point which is not allowed for the reactor safe operation. The flow skirt was used for a better core inlet flow distribution. In order to study the effect of the flow skirt on the flow distribution, the dimension "d" on the top of the flow skirt and the length "t" of the support plate were changed for the simulation. The results showed that "d" had a little effect on the flow distribution, but in the centre area, there was a better distribution with the decreased "d", if the "t" was smaller, the distribution was more uniform.