Calculation Methodology for Effective Bundle-Average Fuel Temperature Correlation

Abstract

The effective bundle average fuel temperatures are required by the full core reactor physics code RFSP for local parameter calculations to account for the fuel temperature reactivity feedback. For a fuel bundle at specific power and burnup, the neutron multiplication value calculated by the lattice physics code WIMS-AECL with a uniform fuel temperature should be the same as when fuel-pin temperature differences are considered. Tahis methodology is illustrated by deriving the effective bundle average fuel temperature correlations for an example fuel design for RFSP calculations.