Uncertainty Analysis of Infinite Homogeneous Lead and Sodium Cooled Fast Reactors at Beginning of Life

The objective of the present work is to estimate breeding ratio, radiation damage rate and minor actinide transmutation rate of infinite homogeneous lead and sodium cooled fast reactors. Uncertainty analysis is performed under multigroup approximation. Uncertainty in nuclear data and uncertainty in the composition of the reactors are taken into account. We use the recently released ENDF/B-VII.1 nuclear data and restrict the work to beginning of reactor life. The adjoint sensitivity analysis is performed to calculate generalized adjoint fluxes for the quantities of interest. The generalized adjoint fluxes are used to calculate first order sensitivities of the quantities of interest to input data. The acquired sensitivities are used to propagate uncertainties in the input data to find out uncertainties in the quantities of interest.