Validation of IRDFF in super(252) Cf Standard and IRDF-2002 Reference Neutron Fields

The results of validation of the latest release of International Reactor Dosimetry and Fusion File, IRDFF-1.03, in the standard super(252) Cf(s.f.) and reference super(235) U(n sub(th),f) neutron benchmark fields are presented. The spectrum-averaged cross sections were shown to confirm IRDFF-1.03 in the super(252) Cf standard spontaneous fission spectrum; that was not the case for the current recommended spectra for super(235) U(n sub(th),f). IRDFF was also validated in the spectra of the research reactor facilities ISNF, Sigma-Sigma and YAYOI, which are available in the IRDF-2002 collection. The ISNF facility was re-simulated to remove unphysical oscillations in the spectrum. IRDFF-1.03 was shown to reproduce reasonably well the spectrum-averaged data measured in these fields except for the case of YAYOI.