Abstract
A comprehensive programme is currently in progress at several laboratories for the development of sensitive, practical, non destructive assay techniques for the quantification of low-level transuranics (TRU) in bulk solid wastes. This report describes the method being developed to assay high density TRU waste packages using photon interrogation. The system uses a pulsed electron beam from a linear accelerator (LINAC) to produce high-energy photon bursts from a metallic converter. The photons induce fissions in TRU. When fission is induced in trace amounts of TRU contaminants in waste material, it provides `signatures` from fission products that can be used to assay the material before disposal. We give here the results from counting photofission-induced delayed neutrons from {sup 239}Pu, {sup 235}U and {sup 238}U in sample matrices. We counted delayed neutrons emitted after each pulse of the LINAC. This enhances the available counts by a factor about 20 compared with the counting of delayed neutrons only after the irradiation period. The electron linear accelerator operates at 15 MeV, 140 mA, and 2.5 {mu}s wide pulse at a 50 Hz rate. The dynamics of photofission and delayed neutron production, use of an electron linear accelerator as a particle source, experimental and electronics details,
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Lyoussi, A;
Edeline, J C;
[1]
Romeyer-Dherbey, J;
[2]
Buisson, A
[3]
- CEA Centre d`Etudes de Saclay, 91 - Gif-sur-Yvette (France). Dept. d`Electronique et d`Instrumentation Nucleaire
- CEA Centre d`Etudes de Cadarache, 13 - Saint-Paul-lez-Durance (France). Dept. d`Etudes des Reacteurs
- Etablissement Technique Central de l`Armement (ETCA), 94 - Arcueil (France)
Citation Formats
Lyoussi, A, Edeline, J C, Romeyer-Dherbey, J, and Buisson, A.
Low level transuranic waste assay by photon interrogation and neutron counting; Detection de transuraniens dans les dechets radioactifs par la methode de photofission.
France: N. p.,
1993.
Web.
Lyoussi, A, Edeline, J C, Romeyer-Dherbey, J, & Buisson, A.
Low level transuranic waste assay by photon interrogation and neutron counting; Detection de transuraniens dans les dechets radioactifs par la methode de photofission.
France.
Lyoussi, A, Edeline, J C, Romeyer-Dherbey, J, and Buisson, A.
1993.
"Low level transuranic waste assay by photon interrogation and neutron counting; Detection de transuraniens dans les dechets radioactifs par la methode de photofission."
France.
@misc{etde_10113101,
title = {Low level transuranic waste assay by photon interrogation and neutron counting; Detection de transuraniens dans les dechets radioactifs par la methode de photofission}
author = {Lyoussi, A, Edeline, J C, Romeyer-Dherbey, J, and Buisson, A}
abstractNote = {A comprehensive programme is currently in progress at several laboratories for the development of sensitive, practical, non destructive assay techniques for the quantification of low-level transuranics (TRU) in bulk solid wastes. This report describes the method being developed to assay high density TRU waste packages using photon interrogation. The system uses a pulsed electron beam from a linear accelerator (LINAC) to produce high-energy photon bursts from a metallic converter. The photons induce fissions in TRU. When fission is induced in trace amounts of TRU contaminants in waste material, it provides `signatures` from fission products that can be used to assay the material before disposal. We give here the results from counting photofission-induced delayed neutrons from {sup 239}Pu, {sup 235}U and {sup 238}U in sample matrices. We counted delayed neutrons emitted after each pulse of the LINAC. This enhances the available counts by a factor about 20 compared with the counting of delayed neutrons only after the irradiation period. The electron linear accelerator operates at 15 MeV, 140 mA, and 2.5 {mu}s wide pulse at a 50 Hz rate. The dynamics of photofission and delayed neutron production, use of an electron linear accelerator as a particle source, experimental and electronics details, and a future experimental works are discussed. 4 refs., 8 figs., 2 tabs.}
place = {France}
year = {1993}
month = {Dec}
}
title = {Low level transuranic waste assay by photon interrogation and neutron counting; Detection de transuraniens dans les dechets radioactifs par la methode de photofission}
author = {Lyoussi, A, Edeline, J C, Romeyer-Dherbey, J, and Buisson, A}
abstractNote = {A comprehensive programme is currently in progress at several laboratories for the development of sensitive, practical, non destructive assay techniques for the quantification of low-level transuranics (TRU) in bulk solid wastes. This report describes the method being developed to assay high density TRU waste packages using photon interrogation. The system uses a pulsed electron beam from a linear accelerator (LINAC) to produce high-energy photon bursts from a metallic converter. The photons induce fissions in TRU. When fission is induced in trace amounts of TRU contaminants in waste material, it provides `signatures` from fission products that can be used to assay the material before disposal. We give here the results from counting photofission-induced delayed neutrons from {sup 239}Pu, {sup 235}U and {sup 238}U in sample matrices. We counted delayed neutrons emitted after each pulse of the LINAC. This enhances the available counts by a factor about 20 compared with the counting of delayed neutrons only after the irradiation period. The electron linear accelerator operates at 15 MeV, 140 mA, and 2.5 {mu}s wide pulse at a 50 Hz rate. The dynamics of photofission and delayed neutron production, use of an electron linear accelerator as a particle source, experimental and electronics details, and a future experimental works are discussed. 4 refs., 8 figs., 2 tabs.}
place = {France}
year = {1993}
month = {Dec}
}