Uncertainties for criticality-safety benchmarks and keffkeff distributions

In a previous paper, we have presented a new method to propagate uncertainties of fundamental nuclear physics model and parameters to large and complicated nuclear systems. In this study, we demonstrate that large-scale uncertainty calculations are feasible by applying this methodology to a series of criticality-safety benchmarks. Uncertainties and distributions for the keffkeff parameter are obtained, considering isotopes from 19F to 241Am. More than 200 criticality-safety benchmarks were studied and uncertainties on keffkeff due to nuclear data were extracted. For more than 40 cases, a complete keffkeff distribution is presented. In some cases where Zr, Pb and W nuclear data uncertainties were considered, an asymmetric keffkeff distribution is found, confirming our previous observations.