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Influence of nuclear glasses composition on their liability to deterioration; Influence de la composition des verres nucleaires sur leur alterabilite

Abstract

This contributes to the study of the nuclear glasses composition influence on their liability to deterioration. The methodology of the experimental research used has lead to define between the thirty oxides which form the reference glass light water, six oxides of interest. For each of these oxides, a composition variation area has been defined. A matrix of twenty glass compositions has then been defined. The preparation of materials of these compositions has sometimes lead to materials weakly heterogeneous which have been characterized before deterioration. This study has been completed by those of three glasses in a composition variation area narrower of the light water nuclear glass : the R7T7 and two glasses at limits having respectively an initial dissolution velocity at 100 degrees Celsius theoretically maximum and minimum. Some deterioration parameters in pure water have been experimentally measured on the twenty three glasses : 1) an initial dissolution velocity at 100 degrees (Vo{sub 1}00) Celsius and another one at 90 degrees Celsius (Vo{sub 9}0) 2) a dissolution velocity in conditions near the saturation at 90 degrees Celsius 3) an apparent solubility of glass based on the ortho silicic acid activity 4) the evolution of the dissolution kinetics at 90 degrees  More>>
Authors:
Publication Date:
Sep 29, 1995
Product Type:
Thesis/Dissertation
Report Number:
FRCEA-TH-520
Reference Number:
SCA: 052001; 052002; 360604; PA: AIX-27:057195; EDB-96:117825; NTS-97:000702; SN: 96001635162
Resource Relation:
Other Information: TH: These (D. es Sc.).; PBD: 29 Sep 1995
Subject:
05 NUCLEAR FUELS; 36 MATERIALS SCIENCE; BOROSILICATE GLASS; CHEMICAL COMPOSITION; CORROSION; DECOMPOSITION; LEACHING; RADIOACTIVE WASTE DISPOSAL; ALUMINIUM OXIDES; ALUMINIUM 27; BORON OXIDES; BORON 11; CONTAINMENT; FISSION PRODUCTS; K CODES; L CODES; LITHIUM OXIDES; MASS SPECTROSCOPY; PH VALUE; RADIOACTIVE WASTES; REPROCESSING; SCANNING ELECTRON MICROSCOPY; SILICON OXIDES; SILICON 29; SODIUM OXIDES; SOLUBILITY; STRUCTURAL MODELS; THERMODYNAMIC MODEL; VITRIFICATION; X-RAY DIFFRACTION; YEARS LIVING RADIOISOTOPES
OSTI ID:
270252
Research Organizations:
CEA Centre d`Etudes de la Vallee du Rhone, 30 - Marcoule (France). Dept. d`Exploitation du Retraitement et de Demantelement; Montpellier-2 Univ., 34 (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
Other: ON: DE96632318; TRN: FR9602024057195
Availability:
INIS; OSTI as DE96632318
Submitting Site:
FRN
Size:
399 p.
Announcement Date:

Citation Formats

Tovena, I. Influence of nuclear glasses composition on their liability to deterioration; Influence de la composition des verres nucleaires sur leur alterabilite. France: N. p., 1995. Web.
Tovena, I. Influence of nuclear glasses composition on their liability to deterioration; Influence de la composition des verres nucleaires sur leur alterabilite. France.
Tovena, I. 1995. "Influence of nuclear glasses composition on their liability to deterioration; Influence de la composition des verres nucleaires sur leur alterabilite." France.
@misc{etde_270252,
title = {Influence of nuclear glasses composition on their liability to deterioration; Influence de la composition des verres nucleaires sur leur alterabilite}
author = {Tovena, I}
abstractNote = {This contributes to the study of the nuclear glasses composition influence on their liability to deterioration. The methodology of the experimental research used has lead to define between the thirty oxides which form the reference glass light water, six oxides of interest. For each of these oxides, a composition variation area has been defined. A matrix of twenty glass compositions has then been defined. The preparation of materials of these compositions has sometimes lead to materials weakly heterogeneous which have been characterized before deterioration. This study has been completed by those of three glasses in a composition variation area narrower of the light water nuclear glass : the R7T7 and two glasses at limits having respectively an initial dissolution velocity at 100 degrees Celsius theoretically maximum and minimum. Some deterioration parameters in pure water have been experimentally measured on the twenty three glasses : 1) an initial dissolution velocity at 100 degrees (Vo{sub 1}00) Celsius and another one at 90 degrees Celsius (Vo{sub 9}0) 2) a dissolution velocity in conditions near the saturation at 90 degrees Celsius 3) an apparent solubility of glass based on the ortho silicic acid activity 4) the evolution of the dissolution kinetics at 90 degrees Celsius in sub-saturated medium towards saturated medium 5) the alteration films nature developed at the glasses surface during these last alteration tests. Some thermodynamic and structural models have been studied in order to predict Vo{sub 9}0 and Vo{sub 1}00. The dissolution kinetic law developed from reference glass dissolution results has been studied with the calculation code LIXIVER. It has not been able to be used for most of the glasses compositions studied. As a consequence, the glasses dissolution control by a surface reaction which are itself controlled by the only dissolved silica is an hypothesis which is not verified for the greater part of the glasses. (O.L.). refs., figs., tabs.}
place = {France}
year = {1995}
month = {Sep}
}