THE INFLUENCE OF OUTLET TEMPERATURE PROFILE ON FUEL ASSEMBLY POWER DETERMINATION
17th Symposium of AER on VVER Reactor Physics and Reactor Safety (2007, Yalta, Crimea (Ukraine, back then))
CORE SURVEILLANCE AND MONITORING. CFD ANALYSIS
Abstract
The paper presents the last results of CFD simulation of coolant flow mixing in fuel assembly’s head. The CFD calculations were performed by VUJE, Inc. mainly for two types of fuel assemblies (FA) operated in present fuel loadings of NPP units in Slovakia (type VVER-440) – profiled 3,82 % enriched FA and Gd-II FA. The coolant outlet temperature profile in the thermocouple position was calculated for different pin-wise power distributions and FA?s burn-up. The paper describes the first step in application of CFD simulation results on measured power distributions in active core.