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Low level transuranic waste assay by photon interrogation and neutron counting; Detection de transuraniens dans les dechets radioactifs par la methode de photofission

Technical Report:

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,  More>>
Authors:
Lyoussi, A; Edeline, J C; [1]  Romeyer-Dherbey, J; [2]  Buisson, A [3] 
  1. CEA Centre d`Etudes de Saclay, 91 - Gif-sur-Yvette (France). Dept. d`Electronique et d`Instrumentation Nucleaire
  2. CEA Centre d`Etudes de Cadarache, 13 - Saint-Paul-lez-Durance (France). Dept. d`Etudes des Reacteurs
  3. Etablissement Technique Central de l`Armement (ETCA), 94 - Arcueil (France)
Publication Date:
Dec 31, 1993
Product Type:
Technical Report
Report Number:
CEA-CONF-11609; CONF-930749-
Reference Number:
SCA: 052002; PA: AIX-25:006830; EDB-94:011971; ERA-19:006144; NTS-94:015071; SN: 94001126644
Resource Relation:
Conference: 34. annual meeting of the Institute of Nuclear Materials Management,Scottsdale, AZ (United States),18-21 Jul 1993; Other Information: PBD: 1993
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; LOW-LEVEL RADIOACTIVE WASTES; TRANSURANIUM ELEMENTS; DELAYED NEUTRON ANALYSIS; PHOTOFISSION; EXPERIMENTAL DATA; HE-3 COUNTERS; LINEAR ACCELERATORS; NEUTRON DETECTION; PACKAGING; PROMPT NEUTRONS; PULSED IRRADIATION; 052002; WASTE DISPOSAL AND STORAGE
OSTI ID:
10113101
Research Organizations:
CEA Centre d`Etudes de Saclay, 91 - Gif-sur-Yvette (France). Dept. d`Electronique et d`Instrumentation Nucleaire
Country of Origin:
France
Language:
English;French
Other Identifying Numbers:
Other: ON: DE94610950; TRN: FR9303877006830
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
FRN
Size:
7 p.
Announcement Date:
Jan 12, 1994

Technical Report:

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}
}