The hydration alteration of a commercial nuclear waste glass

Bates, J. K.; Steindler, M. J.; Tani, B.; Purcell, F.J.

doi:10.1016/0009-2541(85)90088-9

Cited by 13 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Safety assessment studies predict that at least some of the glass will be in contact with water vapor. Unlike with borosilicate glass water corrosion, only some works concerned borosilicate glass vapor hydration . Abrajano et al .…”

Section: Introductionmentioning

confidence: 99%

“…Unlike with borosilicate glass water corrosion, only some works concerned borosilicate glass vapor hydration. [2][3][4][5][6][7][8][9] Abrajano et al 6 found that for all glass compositions studied, the rate of hydration in hydrothermal experiments is higher than the rate of vapor hydration at the same temperature. Hence, many questions are yet to be answered on the glass vapor hydration mechanisms and kinetics, the secondary phases, and radionuclides release upon contact with liquid water.…”

mentioning

confidence: 99%

See 1 more Smart Citation

A Preliminary Investigation of the ISG Glass Vapor Hydration

Abdelouas

Mendili

Chaou

et al. 2013

Int J of Appl Glass Sci

View full text Add to dashboard Cite

During the geological disposal of high-level waste, the nuclear glass is expected to be first hydrated in water vapor prior to liquid alteration. In the present work, we investigated the vapor hydration of the International simple glass (ISG) at 175°C and different relative humidities (60%, 80% and 98%). The glass hydration was investigated by nuclear reaction analysis (NRA) and Fourier transform infra-red spectroscopy. The chemical and mineralogical compositions of the alteration products were studied using scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM-EDS) and μ-Raman spectroscopy, respectively. The NRA results gave water diffusion coefficients of 2.31-7.34 × 10−21 m2/s, in good agreement with the literature data on borosilicate glasses altered in aqueous media. The glass hydration increased with relative humidity percentage and the SEM-EDS analysis showed a slight enrichment in Si and loss of Na in the hydrated glass layer compared with the pristine glass. The hydration rate of the ISG glass was little higher than that of the French SON68 glass hydrated using water vapor. The corrosion products were analcime, tobermorite, and calcite, which were typical of the SON68 glass hydrated in similar conditions

show abstract

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

A Preliminary Investigation of the ISG Glass Vapor Hydration

Abdelouas

Mendili

Chaou

et al. 2013

Int J of Appl Glass Sci

View full text Add to dashboard Cite

show abstract

“…Hydration tests have been shown to accelerate the formation of alteration products without changing the reaction mechanism [6,7,8,9,10]. Thus, this is a good way to demonstrate the similarity between waste glass and natural glass alteration.…”

Section: Relative Elemental Variation Are Illustrated In Figures 1 Anmentioning

confidence: 99%

Basalt glass: an analogue for the evaluation of the long-term stability of nuclear waste form borosilicate glasses

D¹,

J²,

C³

et al. 1984

View full text Add to dashboard Cite

The long-term stability of nuclear waste form borosilicate glasses can be evaluated by understanding the processes that effect the long-term alteration of glass and by comparing laboratory alteration of synthetic basalt and borosilicate glasses with the observed stability of naturally occurring basaltic glasses in diverse geologic environments. This paper presents detailed electron microprobe analyses of naturally altered basaltic glasses (with maxi mum ages of 10,000 to 20 million years) from low-temperature environments. These results are compared to laboratory data on the corrosion of a synthetic basaltic glass in MCC-1 tests (90*C, a SA/V of 0.1 cm" 1 and time periods up to 182 days), MCC-2 tests (190 o C, a SA/V of 0.1 cm" 1 and time periods up to 210 days) and hydration tests in saturated water vapor (2-in°C , an es.tima.ted SA/V of-U06 cm" 1 and time periods up to 63 days). /uditionally, laboratory induced hydration alteration of synthetic basalt and borosilicate glasses is compared. These preliminary experiments provide evidence that the alteration processes observed for natural basalt glasses are relevant to understanding the alteration of nuclear waste glass, as both appear to react via similar processes.

show abstract