The 14 MeV neutron transport in spherical iron assemblies is analyzed on the basis of different computational procedures and new double-differential 56Fe cross-sections (DDX) from the ENDF/B-VI and EFF-2 data files. Comparisons with existing integral 14 MeV neutron experiments and with calculations using uncorrected energy-angle distributions show significant improvements due to the inclusion of DDX-data in the recent fusion-oriented data files. Further analyses are required as the total neutron leakages measured in the referenced integral experiments still are underestimated.

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