A procedure is demonstrated, through a simulation study, for the determination of the origin of unknown spent nuclear fuel,
an important and challenging task in nuclear forensics. The procedure is an isotopic fingerprinting method relying on the
fission product content of the unknown. The ‘unknown’ nuclear material is represented by the spent nuclear fuel of known origin
in order to demonstrate the method and verify its predictive capabilities. The method is based on the comparison of the fission
product compositions of the ‘unknown’ material and simulated known spent fuels from a range of commercial nuclear power stations
using the multivariate statistical technique of factor analysis. Then, the provenance of the ‘unknown’ spent fuel is the commercial
fuel with which it exhibits the highest similarity with respect to the fission product content.