Optimizing fissile nuclide content analysis for delayed gamma-ray spectroscopy nuclear safeguards

Rodriguez, D. ; 小泉 光生 ; Rossi, F. ; 高橋 時音

Rodriguez, D.; Koizumi, Mitsuo; Rossi, F.; Takahashi, Tone

Under the MEXT subsidy to improve nuclear security related activity, we present our latest analytical development of delayed gamma spectroscopic (DGS) analysis for nuclear safeguards. We show the latest results from the ISCN DGS Monte Carlo and comparisons with measured spectra. We highlight differences with other simulation codes, which highlights discrepancies in fission yields from nuclear data and our future direction to improve this for optimal safeguards measurements and reduced uncertainty. We will also summarize how the analysis will be applied with a new instrument designed for small samples for validation of the DGS technique, as well as how this can be applied to full assemblies and alternative fuel cycles.