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Assessment of Nepheline Precipitation in Nuclear Waste Glass Via Thermochemical Modeling

Published online by Cambridge University Press:  10 February 2011

T. M. Besmann ,
K. E. Spear  and
E. C. Beahm
T. M. Besmann
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831-6063, [email protected]
K. E. Spear
Affiliation:
Materials Science and Engineering Department, Pennsylvania State University, University Park, PA 16802-5005
E. C. Beahm
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831-6063
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Abstract

A thermochemical representation of the Na-Al-Si-B-O system relevant for nuclear waste glass has been developed based on the associate species approach for the glass solution phase. Thermochemical data were assessed and associate species data determined for binary and ternary subsystems in the Na2O-AI2O3-B2O3-SiO2 system. Computed binary and ternary phase diagrams were compared to published diagrams during this process, with adjustments in data made as necessary to obtain consistent thermodynamic values. The resulting representation for the four oxide system was used to help understand the problem of nepheline precipitation in certain waste glass formulations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 608: Symposium QQ – Scientific Basis for Nuclear Waste Management XXIII , 1999 , 715
Copyright
Copyright © Materials Research Society 2000

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References

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