[en] In the first part of this work, an experimental investigation was performed to examine the possibility of using the (n,n',γ) technique to measure neutron inelastic scattering cross sections in U-235. Incident neutrons in the energy range from 100 keV to 500 keV were used. Techniques were developed to deal with the problems of fission neutron and gamma-ray interference. Gamma-ray production cross sections were measured for three isomeric gamma rays which have been identified as being from U-235 fission products and for six gamma rays which have been identified as being de-excitation gamma rays after neutron inelastic scattering. The gamma-ray production cross sections were used to estimate the upper limit on the neutron inelastic sections were used to estimate the upper limit on the neutron inelastic scattering cross section for the 129 keV level in U-235. The measured gamma-ray production cross sections were compared to the evaluated gamma-ray production cross sections which are presented in ENDF/B-V. The evaluated cross sections significantly overestimate the measured cross sections in most cases. In the second part of this work, a sensitivity analysis was performed to determine the relative important of the neutron scattering cross sections in uranium. The analysis was performed by implementing the FORSS sensitivity and Uncertainty Analysis Code System which was developed at the Oak Ridge National Laboratory