Buoyancy Induced Flow and Heat Redistribution During LMFBR Core Decay Heat Removal

摘要

Natural convection cooling of the core exhibits one of the few core design transients where low power/high temperature conditions exist. Core inter-assembly and intra-assembly flow/heat redistribution: (a) become significant with regard to accurately predicting temperatures; and (b) decrease the maximum hot element temperatures. A technique is described herein for linking dynamic core-wide transient effects as predicted by COBRA-WC to the localized hot element temperatures calculated with FORE-2M. These latter temperatures are used in evaluations with regard to core design adequacy. (ERA citation 05:017737)