Abstract
Nuclear data validations through the fusion neutronics shielding benchmarks for the OKTAVIAN nickel, iron, aluminum, silicon, and tungsten spheres were carried out with the MCNPX-2.5.0 code. The measured neutron and/or gamma-ray leakage spectra were compared with the calculation results using the ACE format libraries processed based on ENDF/B-VII.0, JEFF-3.1, JENDL-3.3, and FENDL-2.1. These benchmarks were suitable for the nuclear data sensitivity analyses through comparisons of the major reaction rates depending on the neutron energy. The neutron and gamma-ray leakage spectra were dominated by the productions from the (n,2n) and inelastic scattering reactions rather than those from the radiative capture reaction.
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