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Article
Compositional Effects on the Long-Term Durability of Nuclear Waste Glasses: A Statistical Approach
As a result of the development of a reference glass formulation for the immobilization of West-Valley nuclear waste, a large number of glass compositions have been tested under a variety of leaching conditions...
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Article
Long-Term Behavior of Embiez Archaeological Glass: Results after 1800 Years of Alteration in a Marine Environment
An archaeological glass initially fractured and altered for 1800 years in a marine environment is now being examined by the CEA because of its strong morphological similarity to the nuclear glasses used for im...
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Article
Insight into silicate-glass corrosion mechanisms
The remarkable chemical durability of silicate glass makes it suitable for a wide range of applications. The slowdown of the aqueous glass corrosion kinetics that is frequently observed at long time is general...
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Article
Single Idealized Cracks: A Tool for Understanding Fractured Glass Block Leaching
Within the scope of the long term behaviour of the R7T7 glass, which is the French nuclear glass, leaching and its coupling with transport mechanisms is studied. Experiments carried out on a SON 68 glass (inac...
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Article
Apparent Solubility Limit of Nuclear Glass
Most nuclear glass alteration models are based on a first-order kinetic law of the general type r = r 0 (1–C si/C*) or r = r 0 (1–Q/K). It is generally assumed that the establishment of quasi steady-state concent...
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Article
Glass Corrosion in the Presence of Iron-Bearing Materials and Potential Corrosion Suppressors
A complete understanding of radioactive waste glass interactions with near-field materials is essential for appropriate nuclear waste repository performance assessment. In many geologic repository designs, Fe ...
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Article
Open AccessOrigin and consequences of silicate glass passivation by surface layers
Silicate glasses are durable materials, but are they sufficiently durable to confine highly radioactive wastes for hundreds of thousands years? Addressing this question requires a thorough understanding of the...
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Article
Open AccessVarious effects of magnetite on international simple glass (ISG) dissolution: implications for the long-term durability of nuclear glasses
Understanding the effect of near-field materials, such as iron corrosion products, on the alteration of vitreous nuclear waste is essential for modeling long-term stability of these waste forms in a geological...
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Article
Open AccessMaterial degradation foreseen in the very long term: the case of glasses and ferrous metals
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Article
Open AccessContribution of zeolite-seeded experiments to the understanding of resumption of glass alteration
Understanding the origin and the consequences of glass alteration regimes is necessary for the prediction of nuclear glass durability. The so-called “stage 3” or “resumption of alteration regime” of glasses us...
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Article
Open AccessStructure of International Simple Glass and properties of passivating layer formed in circumneutral pH conditions
Knowing the structure of a material is necessary to understand its evolution under various influences; here, the alteration by water of a reference glass of nuclear interest, called International Simple Glass ...
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Article
Open AccessMolecular Dynamics Simulation of Water Confinement in Disordered Aluminosilicate Subnanopores
The porous structure and mass transport characteristics of disordered silicate porous media were investigated via a geometry based analysis of water confined in the pores. Disordered silicate porous media were...
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Article
Open AccessChemical durability of peraluminous glasses for nuclear waste conditioning
For the handling of high level nuclear waste (HLW), new glass formulations with a high waste capacity and an enhanced thermal stability, chemical durability, and processability are under consideration. This st...
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Article
Open AccessImpact of alkali on the passivation of silicate glass
Amorphous silica-rich surface layers, also called gels, can passivate silicate glass and minerals depending on environmental conditions. However, several uncertainties remain on the mechanisms controlling the ...
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Article
Open AccessDynamics of self-reorganization explains passivation of silicate glasses
Understanding the dissolution of silicate glasses and minerals from atomic to macroscopic levels is a challenge with major implications in geoscience and industry. One of the main uncertainties limiting the de...
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Article
Open AccessSpectroscopic ellipsometry study of thickness and porosity of the alteration layer formed on international simple glass surface in aqueous corrosion conditions
The porosity and pore-size distribution in the glass play an important role in glass corrosion; however, such information is difficult to be obtained non-destructively. Here we report the use of spectroscopic ...
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Article
Open AccessApplication of GRAAL model to the resumption of International Simple Glass alteration
The methodology developed for predicting nuclear waste behavior under disposal conditions combines experimental approaches and modeling. A waste glass canister placed in contact with water undergoes irreversib...
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Article
Open AccessEffect of thermally induced structural disorder on the chemical durability of International Simple Glass
While the influence of silicate oxide glass composition on its chemical durability is increasingly known, the contribution of structure only is less well understood, yet is crucial for an accurate description ...
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Article
Open AccessSimplifying a solution to a complex puzzle
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Article
Open AccessModeling glass corrosion with GRAAL
Computational codes are necessary tools for geochemical modeling of the alteration of minerals due to their ability to handle key mechanisms, such as dissolution, precipitation, diffusion, and convection at ma...
