Use of Cross Section Sensitivities in the Analysis of Fast Reactor Integral Parameters

摘要

A cross section adjustment system has been developed at Argonne National Laboratory to study the various discrepancies obtained in the prediction of a range of reactor parameters. Cross section sensitivities are calculated with a generalized perturbation theory code. Discrepancies with experiment are minimized by a least squares adjustment of multigroup cross sections. Correlation data between cross sections and between integral measurements is included where available. The sensitivity information permits the correlation of C/E results for a variety of parameters and assemblies having different material compositions and spectra. The integral data at present includes K/sub eff/ and reaction rate ratios for four ZPR benchmark assemblies and seven zero-leakage test zones built in the UK.