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Mechanism of the rapid dissolution of PuO{sub 2} under oxidizing conditions and applications

Conference:

Abstract

Until the recent years, plutonium dioxide was known to be among the metallic oxides the most difficult to dissolve. From thermodynamic calculations it can be predicted that PuO{sub 2} will dissolve under oxidizing conditions. This can be achieved using Ag(II) species possibly regenerated by electrochemical means. The mechanism of such a process has been elucidated using carbon paste electrochemistry and {sup 18}O labelling. These studies demonstrate that the chemical reaction limiting the overall proces is located on the surface of the solid PuO{sub 2}, and that the first step consists in the oxidation of the plutonium into Pu(V) species. Applications of the dissolution process of PuO{sub 2} by electrogenerated Ag(II) were growing in the recent years in FRANCE. These applications developed often in collaboration with SGN and COGEMA, concern the treatment of: out of specifications PuO{sub 2}, incineration ashes, wastes produced during MOX fuel fabrication, and during the dismantling of old nuclear facilities. A general overview of these different applications is given.
Authors:
Madic, C; Lecomte, M; Bourges, J; Koehly, G; [1]  Moulin, J P [2] 
  1. CEA Centre d`Etudes de la Vallee du Rhone, 30 - Marcoule (FR). Dept. des Procedes de Retraitement
  2. Societe Generale pour les Techniques Nouvelles (SGN), 78 - Saint-Quentin-en-Yvelines (FR)
Publication Date:
Dec 31, 1991
Product Type:
Conference
Report Number:
CEA-CONF-10551; CONF-910413-
Reference Number:
SCA: 050800; 052001; PA: FRD-92:000065; SN: 92000658044
Resource Relation:
Conference: 3. international conference on nuclear fuel reprocessing and waste management,Sendai (Japan),14 Apr 1991; Other Information: PBD: 1991
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; PLUTONIUM DIOXIDE; DISSOLUTION; ALPHA-BEARING WASTES; DECONTAMINATION; OXIDATION; SILVER; ELECTROCHEMISTRY; SOLID WASTES; 050800; 052001; SPENT FUELS REPROCESSING; WASTE PROCESSING
OSTI ID:
10116268
Research Organizations:
CEA Centre d`Etudes de la Vallee du Rhone, 30 - Marcoule (France). Dept. des Procedes de Retraitement
Country of Origin:
France
Language:
English
Other Identifying Numbers:
Other: ON: DE92767140; TRN: FR9200065
Availability:
OSTI; NTIS (US Sales Only)
Submitting Site:
FRN
Size:
6 p.
Announcement Date:
Jun 30, 2005

Conference:

Citation Formats

Madic, C, Lecomte, M, Bourges, J, Koehly, G, and Moulin, J P. Mechanism of the rapid dissolution of PuO{sub 2} under oxidizing conditions and applications. France: N. p., 1991. Web.
Madic, C, Lecomte, M, Bourges, J, Koehly, G, & Moulin, J P. Mechanism of the rapid dissolution of PuO{sub 2} under oxidizing conditions and applications. France.
Madic, C, Lecomte, M, Bourges, J, Koehly, G, and Moulin, J P. 1991. "Mechanism of the rapid dissolution of PuO{sub 2} under oxidizing conditions and applications." France.
@misc{etde_10116268,
title = {Mechanism of the rapid dissolution of PuO{sub 2} under oxidizing conditions and applications}
author = {Madic, C, Lecomte, M, Bourges, J, Koehly, G, and Moulin, J P}
abstractNote = {Until the recent years, plutonium dioxide was known to be among the metallic oxides the most difficult to dissolve. From thermodynamic calculations it can be predicted that PuO{sub 2} will dissolve under oxidizing conditions. This can be achieved using Ag(II) species possibly regenerated by electrochemical means. The mechanism of such a process has been elucidated using carbon paste electrochemistry and {sup 18}O labelling. These studies demonstrate that the chemical reaction limiting the overall proces is located on the surface of the solid PuO{sub 2}, and that the first step consists in the oxidation of the plutonium into Pu(V) species. Applications of the dissolution process of PuO{sub 2} by electrogenerated Ag(II) were growing in the recent years in FRANCE. These applications developed often in collaboration with SGN and COGEMA, concern the treatment of: out of specifications PuO{sub 2}, incineration ashes, wastes produced during MOX fuel fabrication, and during the dismantling of old nuclear facilities. A general overview of these different applications is given.}
place = {France}
year = {1991}
month = {Dec}
}