2013
DOI: 10.1557/opl.2013.94
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Long-term aqueous alteration kinetics of an alpha-doped SON68 borosilicate glass

Abstract: The long-term behavior of nuclear glass subjected to alpha radiation by minor actinides must be investigated with a view to geological disposal. This study focuses on the effect of alpha radiation on the chemical reactivity of R7T7 glass with pure water, mainly on the residual alteration rate regime. A glass specimen doped with 0.85 wt% 239 PuO 2 ( emitter) is leached under static conditions in argon atmosphere at 90°C and at a high surface-area-to-volume ratio (S/V = 20 cm -1 ). The alteration rate is monitor… Show more

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Cited by 1 publication
(3 citation statements)
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“…Moreover, data regarding silicon obtained on doped glasses indicate that the altered layer properties were not affected by alpha and beta self-irradiation. Furthermore, this is corroborated by SEM 21 and TEM observations of the altered glasses: the same phases were observed on radioactive and nonradioactive altered glass powders, leading to the conclusion that the beta and the alpha irradiation fields of these glasses did not induce any micromorphological changes in the formation of the alteration layer and did not modify its passivating role.…”
Section: Discussionsupporting
confidence: 69%
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“…Moreover, data regarding silicon obtained on doped glasses indicate that the altered layer properties were not affected by alpha and beta self-irradiation. Furthermore, this is corroborated by SEM 21 and TEM observations of the altered glasses: the same phases were observed on radioactive and nonradioactive altered glass powders, leading to the conclusion that the beta and the alpha irradiation fields of these glasses did not induce any micromorphological changes in the formation of the alteration layer and did not modify its passivating role.…”
Section: Discussionsupporting
confidence: 69%
“…The isotopic distribution and the glass dose rate at the beginning of the leaching test have been calculated, and the corresponding values are detailed in the Table . In 2008, its alpha activity was 5 × 10 7 Bq/g, which corresponds to about 150 Gy/h, and is thus representative of the typical R7T7 glass dose rate after around 1500 years …”
Section: Methodsmentioning
confidence: 90%
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