Feasibility study of fissile mass quantification by photofission delayed gamma rays in radioactive waste packages using MCNPX

Eric Simon 1 Bertrand Perot 2 Stéphane Plumeri 3 Fanny Jallu 2
1 ISC Paris - Institut Supérieur du Commerce de Paris
2 LMN - Laboratoire de Mesures Nucléaires
SMTA - Service Mesures et modélisation des Transferts et des Accidents graves : DEN/DTN
3 ANDRA - Agence Nationale pour la Gestion des Déchets Radioactifs
Abstract : The feasibility of fissile mass quantification in large, long-lived medium activity radioactive waste packages using photofission delayed gamma rays has been assessed with MCNPX. The detection limit achievable is lower than the expected uranium mass in these waste packages, but the important sensibility to the waste matrix density and sample localization imposes to get an accurate measurement of these parameters. An isotope discrimination method based on gamma-ray ratios has been evaluated showing that photofission delayed gamma rays can be used to measure the fissile mass as well as the total uranium mass.
Keywords : MCNPX Radioactive waste packages Waste matrices Uranium Photofission Radioactive waste package Fission reactions Radioactive wastes Radioactivity Accurate measurement Detection limits Feasibility studies Isotope discrimination Gamma rays
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Journal articles
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https://hal-cea.archives-ouvertes.fr/cea-01992404
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Submitted on : Thursday, January 24, 2019 - 2:04:57 PM
Last modification on : Thursday, December 5, 2019 - 1:15:52 AM

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Eric Simon, Bertrand Perot, Stéphane Plumeri, Fanny Jallu. Feasibility study of fissile mass quantification by photofission delayed gamma rays in radioactive waste packages using MCNPX. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Elsevier, 2016, 840, pp.28-35. ⟨10.1016/j.nima.2016.09.047⟩. ⟨cea-01992404⟩

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