Journal ArticleDOI
Chemical Corrosion of Cogema Glass R7T7 in High Saline Brines - Part II
TLDR
The kinetic results of corrosion experiments of glass R7T7 in brine 2 (high Mg and Ca concentrations) and brine 3 (high Na, low Ca concentrations, no Ca) in this paper were similar to those reported for the corrosion in BRIN, and further support is lent to the idea that corrosion can be described by a transient process that depends on the Si concentration in solution (prior to arriving at steady state Si concentration) and another one where this dependence vanishes or becomes small (after constant Si concentration is reached).Abstract:
The kinetic results of corrosion experiments of glass R7T7 in brine 2 (high Mg and Ca concentrations) and brine 3 (high Na, low Ca concentrations) in this study are similar to those reported for the corrosion in brine 1 (high Mg concentration, no Ca) in [1]. Further support is lent to the idea that corrosion can be described, by a transient process that depends on the Si concentration in solution (prior to arriving at steady state Si concentration) and another one where this dependence vanishes or becomes small (after constant Si concentration is reached). This is analogous to what is known about corrosion of glass R7T7 and of other glasses in deionized water [4].read more
Citations
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Journal ArticleDOI
Radionuclides containment in nuclear glasses: an overview
TL;DR: In this article, the authors present a summary of current knowledge on the formulation, irradiation resistance and chemical durability of these conditioning materials, with a special focus on the fate of radionuclides during glass processing and aging.
Journal ArticleDOI
Current state of knowledge of nuclear waste glass corrosion mechanisms: the case of R7T7 glass
E.Y. Vernaz,J.L. Dussossoy +1 more
TL;DR: In this article, the mechanisms of aqueous corrosion of nuclear waste glasses are reviewed, and the role of secondary mineral phases formed during glass alteration is discussed. But none of the minerals that have been experimentally identified can control the long-term H4SiO4 activity in the French R7T7 reference glass, and can thus account for the low residual dissolution rates observed.
Journal ArticleDOI
Empirical Dissolution Rate Law for the Glass R7T7 Contacting Halite- and Silica-Saturated Brines
TL;DR: In this article, the time dependence of release of glass constituents during static dissolution experiments with the COGEMA glass R7T7 in saline MgCl2 and NaCl dominated solutions at temperatures between 110 and 190°C.
Journal ArticleDOI
Current status of radioactive waste disposal
Gregory R. Choppin,P. J. Wong +1 more
TL;DR: In this paper, the technical issues involved in the development of a feasible solution toward permanent radioactive waste disposal are described, and recent progress on internationally collaborative research efforts concerning the multibarrier concept, in situ experiments, computer modeling and natural analogues are discussed.
Journal ArticleDOI
Release of Rare Earth Elements and Uranium from Glass in Low pH High Saline Brines
TL;DR: In this article, the release of rare earth elements and of U during corrosion of the nuclear waste borosilicate glass R7T7 in 3 brines was studied at temperatures between 110 and 190°C.
References
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Journal ArticleDOI
Chemical Corrosion of Cogema Glass R7T7 in High Saline Brines
TL;DR: In this article, the French Cogema glass R7T7 has been investigated in three reference salt brines (brine 1: high Mg, brine 2: Ca and Mg and brine 3: high Na) at three different temperatures, 110°, 150°, and 190°C and three S/V ratios, 10, 100, and 1000m−1.
Journal ArticleDOI
The Effect of Phase Formation on Glass Leaching
TL;DR: In this paper, it has been shown that the release mechanism under static leaching conditions is very complex involving several processes, such as ion exchange and congruent dissolution, and fits using a combination of these two processes gave unsatisfactory results.