2nd International Summer School
on Nuclear Glass Wasteform:
Structure, Properties and Long-Term Behavior Wasteform

September 23 to 27, 2013 in the site of Pont du Gard (France)


Glass behavior in open systems

Glass is a thermodynamically metastable phase, and undergoes irreversible transformation into more stable phases, especially in the presence of water. In the perspective of the safety assessment of the future geological disposal, the challenge is to be able to calculate at what rate this transformation and the corresponding release of radionuclides into the groundwater will take place.
The corrosion of nuclear glass arises from several coupled mechanisms: hydration, ion exchange, hydrolysis/condensation reactions, and precipitation of crystalline phases. These processes depend on several parameters such as temperature, pH, water composition and flow rate, and thus indirectly on other nearby solid phases surrounding the glass. Uncertainties remain on the rate-limiting mechanisms controlling the long-term rate (also called the residual rate) and those responsible for the resumption of alteration.
The goals of this session are (i) to present the state of the art of glass corrosion mechanisms and relationships with the kinetic regimes, (ii) to discuss the effects of the main parameters influencing the mechanisms and rate, including glass composition effects, and (iii) to discuss ways to improve our current understanding and models.

Proceeding, important dates

Deadline for submission

icon calendarDecember 20th 2013

Paper review feedback deadline

icon calendarFebruary 15th 2014

Final version

icon calendarMarch 15th 2014

Sumglass Gallery


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