Benchmark Validation by means of Pulsed Sphere Experiment at KOTAVIAN

摘要

In order to make benchmark validation of the existing evaluated nuclear data for fusion related material, neutron leakage spectra from spherical piles were measured with a time-of-flight technique using the intense 14 MeV neutron source, OKTAVIAN in the energy range from 0.1 to 15 MeV. The neutron energy spectra were obtained as the absolute value normalized per the source netron. The measured spectra were compared with those by theoretical calculation using a Monte arlo neutron transport code, MCNP with several libraries processed from the evalauted nuclear data files. comparison has been made with the spectrum shape, the C/E values of neutron numbers integrated in 4 energy regions and the calculated spectra unfolded by the number of collisions, especially those after a single collision.