Recent Application of Nuclear Data to Reactor Core Analysis in JAEA

Abstract

eld. Sensitivities of ssion product concentrations of LWR burned fuel to nuclear data have been evaluated based on the depletion perturbation theory. Important nuclear data are specied for the accurate prediction of ssion product concentrations. Extended bias factor methods are applied for the uncertainty evaluation of a fast breeder reactor core. From the application, the extemded bias factor methods powerfully eliminate the uncertainty due to cross section errors by utilizing a number of integral data.