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This paper reports a feasibility study, performed by numerical simulation with MCNPX, of fissile mass characterization in dense, large volume, long-lived and medium activity radioactive waste packages, using photofission delayed gamma rays. High-energy photon interrogation with a 15 MeV LINAC has been modelled for a 1.18 m3 cemented waste package, coupled to high resolution spectroscopy with a HP...
This paper discusses the use of nuclear resonance fluorescence (NRF) techniques for the isotopic and quantitative assaying of radioactive material. Potential applications include age-dating of an unknown radioactive source, pre- and post-detonation nuclear forensics and safeguards for nuclear fuel cycles Examples of age-dating a strong radioactive source and assaying a spent fuel pin are discussed...
The measured value of the 2.176 MeV 238U Nuclear Resonance Fluorescence (NRF) peak count rate were compared with simulation results. The simulation methods studied include GEANT4, MCNP5 and MCNPX. The simulation results were found out to be consistent but one order of magnitude higher than the measured value. The possible reasons for this discrepancy were discussed.
A photo-neutron source has been realized at the DaΦne Beam Test Facility: neutrons are produced by sending high energy electrons (510 MeV) to impinge on an optimized target. Neutron flux and spectra have been measured along well designed extraction lines. The experimental data have been compared with Monte Carlo predictions performed with FLUKA and MCNPX, respectively. The comparison between measured...
This paper discusses the use of nuclear resonance fluorescence (NRF) techniques for the isotopic and quantitative assaying of radioactive material. Potential applications include age-dating of an unknown radioactive source, pre- and post-detonation nuclear forensics, and safeguards for nuclear fuel cycles Examples of age-dating a strong radioactive source and assaying a spent fuel pin are discussed...
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