Comparison of fresh fuel experimental measurements to MCNPX calculations using self-interrogation neutron resonance densitometry

► Development of new measurement technique called SINRD to improve LWR safeguards. ► Performed SINRD experiment to measure 235U and pin diversions in PWR fresh assembly. ► Excellent agreement of MCNPX and measured results confirmed accuracy of SINRD model. ► SINRD can verify 235U and pin removal with high sensitivity using known DU assembly for calibration.