FENDL-3.0 benchmark test with iron and concrete shielding experiments for quasi mono-energetic 40 MeV neutrons at JAEA/TIARA

Konno, Chikara  ; Ota, Masayuki; Ochiai, Kentaro; Sato, Satoshi

IAEA released a new version of Evaluated Nuclear Data Library (FENDL), FENDL-3.0 in 2012 in order to extend the neutron energy range of neutron-induced reactions from 20 MeV to more than 60 MeV. We have carried out benchmark tests of the general purpose data library for neutron-induced reactions in FENDL-3.0 by using iron and concrete shielding experiments with the 40 MeV quasi mono-energetic neutron source at TIARA in JAEA. As a result, it was found out that the calculations with FENDL-3.0 agreed with the measured ones for the iron experiment well, while they overestimated the measured ones for the concrete experiment more for the thicker assemblies. We specified that the smaller non-elastic scattering cross sections of O caused the overestimation in the calculation with FENDL-3.0 for the concrete experiment. The O data in FENDL-3.0 should be revised.