Uncertainty analyses of neutron cross sections for nitrogen-15, lead-206,207,208, bismuth-209, plutonium-238, americium-242m, and curium-244 in JENDL-3.3

Covariances of neutron cross sections for 15N, 206,207,208Pb, 209Bi, 238Pu, 242m Am and 244Cm contained in JENDL-3.3 have been evaluated for the design of accelerator-driven transmutation systems. The covariances were obtained from the experimental data and model calculations on which the JENDL-3.3 data were based. The physical quantities for which covariances were deduced are the elastic scattering cross section of 15N, the inelastic scattering cross sections of 206,207,208Pb and 209Bi, and the fission and capture cross sections of 238Pu, 242m Am and 244Cm. Uncertainties in the resolved resonance parameters were estimated for 238Pu, 242m Am and 244Cm. The results were compiled in the ENDF-6 format and merged with the JENDL-3.3 data.