Nuclear data uncertainties for local power densities in the Martin-Hoogenboom benchmark

Nuclear Research and consultancy Group NRG, P.O. Box 25, 1755 ZG Petten, the Netherlands

Abstract

The recently developed method of fast Total Monte Carlo to propagate nuclear data uncertainties was applied to the Martin-Hoogenboom benchmark. For each of the more than 6 million local power tallies, the uncertainty due to nuclear data uncertainties was calculated, based on random variation of data for ²³⁵U, ²³⁸U, ²³⁹Pu and H in H₂O thermal scattering. In the center of the core region, the nuclear data uncertainty is 0.9%. Towards the edges of the core, this uncertainty increases to roughly 3%.