- Conference date: 11-14 May 2005
- Location: Cadarache (France)
We describe recent nuclear model calculations and evaluations of neutron reactions on actinides in the forthcoming ENDF/B‐VII US nuclear data library, with particular attention to the uranium isotopes 232–241U in the keV – 30 MeV energy range. This work makes use of extensive sets of measurements for fission, elastic, inelastic, (n,xn) and capture, as well as fission probability data. Nuclear reaction model calculations were performed for the whole suite of uranium isotopes to allow us to take advantage of the systematical properties from isotope‐to‐isotope, which is especially useful for nuclides where few measurements exist. In addition to improving the neutron cross sections and energy‐angle distributions, new prompt fission neutron spectra and prompt/delayed neutron multiplicity evaluations are included for several isotopes. We also give some examples of integral data testing using MCNP simulations of critical assemblies, for both k‐eff calculations and fission, n2n, and capture reaction rate calculations.
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