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The reactivity of clay materials in a context of metallic corrosion: application to disposal of radioactive wastes in deep argillaceous formations; Reactivite des materiaux argileux dans un contexte de corrosion metallique: application au stockage des dechets radioactifs en site argileux

Abstract

In order to confine radioactive wastes in deep settings, it is envisaged to use some natural clay materials and bentonites. Their stability when in contact with metallic iron, main component of the canisters, is studied. These studies show that the reactivity of such materials is mainly controlled by those of their di-octahedral smectites and kaolinites. On the contrary, the presence of sulfides stops the Fe(0)-clays reaction. The kind of reaction products depends on the quantity of available metallic iron. When pH is over 7, the Fe(0) is oxidized consecutive to a physical contact with the oxidant agents of the smectite (H{sup +}, OH{sup -} et Fe{sup 3+}). This reaction is favored by the heterogeneities of the lateral surfaces of the smectite, which then describes a micro-environments in which some serpentines grow up if the iron supply is sufficient. Such new-crystallization imply a decrease of the confinement properties of the clay barrier. (author)
Authors:
Publication Date:
Oct 15, 2004
Product Type:
Thesis/Dissertation
Report Number:
FRNC-TH-6590
Resource Relation:
Other Information: TH: These geosciences; Also available from Service commun de la documentation. INPL. Centre de Brabois, 2, avenue de la Foret de Haye BP 169, 54505 - Vandoeuvre-Les-Nancy Cedex (France)
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; ARGILLITE; BENTONITE; CORROSION; CRYSTALLIZATION; DISSOLUTION; IRON; IRON COMPOUNDS; KAOLINITE; RADIOACTIVE WASTE DISPOSAL; REDOX REACTIONS; RESEARCH PROGRAMS; SERPENTINE; SMECTITE; SULFIDES; UNDERGROUND STORAGE
OSTI ID:
21000763
Research Organizations:
Institut National Polytechnique, 54 - Nancy (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR0605204025629
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
283 pages
Announcement Date:
Apr 11, 2008

Citation Formats

Perronnet, M. The reactivity of clay materials in a context of metallic corrosion: application to disposal of radioactive wastes in deep argillaceous formations; Reactivite des materiaux argileux dans un contexte de corrosion metallique: application au stockage des dechets radioactifs en site argileux. France: N. p., 2004. Web.
Perronnet, M. The reactivity of clay materials in a context of metallic corrosion: application to disposal of radioactive wastes in deep argillaceous formations; Reactivite des materiaux argileux dans un contexte de corrosion metallique: application au stockage des dechets radioactifs en site argileux. France.
Perronnet, M. 2004. "The reactivity of clay materials in a context of metallic corrosion: application to disposal of radioactive wastes in deep argillaceous formations; Reactivite des materiaux argileux dans un contexte de corrosion metallique: application au stockage des dechets radioactifs en site argileux." France.
@misc{etde_21000763,
title = {The reactivity of clay materials in a context of metallic corrosion: application to disposal of radioactive wastes in deep argillaceous formations; Reactivite des materiaux argileux dans un contexte de corrosion metallique: application au stockage des dechets radioactifs en site argileux}
author = {Perronnet, M}
abstractNote = {In order to confine radioactive wastes in deep settings, it is envisaged to use some natural clay materials and bentonites. Their stability when in contact with metallic iron, main component of the canisters, is studied. These studies show that the reactivity of such materials is mainly controlled by those of their di-octahedral smectites and kaolinites. On the contrary, the presence of sulfides stops the Fe(0)-clays reaction. The kind of reaction products depends on the quantity of available metallic iron. When pH is over 7, the Fe(0) is oxidized consecutive to a physical contact with the oxidant agents of the smectite (H{sup +}, OH{sup -} et Fe{sup 3+}). This reaction is favored by the heterogeneities of the lateral surfaces of the smectite, which then describes a micro-environments in which some serpentines grow up if the iron supply is sufficient. Such new-crystallization imply a decrease of the confinement properties of the clay barrier. (author)}
place = {France}
year = {2004}
month = {Oct}
}