Validation of IRDFF in Cf-252 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 Cf-252(s. f.) and reference U-235(nth, f) neutron benchmark fields are presented. The spectrum-averaged cross sections were shown to confirm IRDFF-1.03 in the Cf-252 standard spontaneous fission spectrum; that was not the case for the current recommended spectra for U-235(nth, 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.