Kinetic study and structural evolution of SON68 nuclear waste glass altered from 35 to 125 °C under unsaturated H2O and D2O18 vapour conditions. (15th April 2018)

• Record Type: Journal Article
• Authors: Bouakkaz, Rachid; Abdelouas, Abdesselam; Grambow, Bernd
• Is Part Of: Corrosion science. Volume 134(2018)
• Page Start: 1
• Page End: 16
• Publication Date: 2018-04-15
• Subjects: SON68 glass -- Vapour hydration -- Nuclear waste disposal -- Deuterium -- Raman -- SIMS; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2017.12.035
• Languages: English
• ISSNs: 0010-938X

Abstract

Graphical abstract: Abstract: The French reference SON68 nuclear waste glass corrosion under H2 O and D2 O 18 atmosphere was investigated at 35−125 °C and different relative humidities (92–99.9%). The hydration kinetic was followed by FTIR and solid characterization was achieved using SEM/EDX, Raman and TOF-SIMS. The water diffusion coefficients in the glass ranged from 8.7 × 10 −22 to 5.3 × 10 −19 m 2 s −1 . The alteration products were calcite, apatite, powellite and tobermorite. Pre-hydrated glass alteration in synthetic groundwater at 50 °C showed an instantaneous release of elements from the surface, making it important to evaluate well the vapour hydration period of the glass.