Basalt glass: an analogue for the evaluation of the long-term stability of nuclear waste form borosilicate glasses
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 maximum 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/sup 0/C, a SA/V of 0.1 cm/sup -1/ and time periods up to 182 days), MCC-2 tests (190/sup 0/C, a SA/V of 0.1 cm/sup -1/ and time periods up to 210 days) and hydration tests in saturated water vapor (240/sup 0/C, an estimated SA/V of approx. 10/sup 6/ cm/sup -1/ and time periods up to 63 days). Additionally, 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. 12 references, 6 figures, 1 table.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States); New Mexico Univ., Albuquerque (USA)
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 6224477
- Report Number(s):
- CONF-841157-39; ON: DE85004064
- Resource Relation:
- Conference: Symposium on the scientific basis for nuclear waste management, Boston, MA, USA, 26 Nov 1984; Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
BOROSILICATE GLASS
LEACHING
GLASS
ELECTRON MICROPROBE ANALYSIS
HYDRATION
BASALT
COMPARATIVE EVALUATIONS
CORROSION
EXPERIMENTAL DATA
STABILITY
SYNTHETIC ROCKS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
DATA
DISSOLUTION
IGNEOUS ROCKS
INFORMATION
MATERIALS
MICROANALYSIS
NUMERICAL DATA
ROCKS
SEPARATION PROCESSES
SOLVATION
SYNTHETIC MATERIALS
VOLCANIC ROCKS
052002* - Nuclear Fuels- Waste Disposal & Storage
360603 - Materials- Properties
360604 - Materials- Corrosion
Erosion
& Degradation