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Fission Product Immobilisation in Secondary Phases Formed During Magnox Waste Glass Dissolution at 60 °C: Experimental Results and Modelling.

Published online by Cambridge University Press:  11 February 2011

Paul K. Abraitis ,
Charlie R. Scales  and
Neil C. Hyatt
Paul K. Abraitis
Affiliation:
BNFL, R&T, B170, Sellafield, Seascale, Cumbria CA20 1PG, U.K. ([email protected])
Charlie R. Scales
Affiliation:
BNFL, R&T, B170, Sellafield, Seascale, Cumbria CA20 1PG, U.K. ([email protected])
Neil C. Hyatt
Affiliation:
Immobilisation Science Laboratory, Department of Engineering Materials, University of Sheffield, Mappin Street, Sheffield, S1 3JD, U.K.
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Abstract

Dissolution of a complex, simulated Magnox Waste (MW) glass in batch dissolution experiments at 60 °C over a period of 56 days is accompanied by extensive development of secondary gels. Gel development has been followed using a range of chemical, spectroscopic and physical means. Initially, a surface layer comprising (hydr)oxides of Fe, Zr and the lanthanides develops at the glass surface. Aluminosilicate gels containing Si, Al, Mg, Sr, Cs and Rb develop in systems where sufficient quantities of glass derived solutes accumulate in the leachate. These gels are hydrous and readily soluble in acidic oxalate solutions. Solution chemistry data is consistent with the development of Cs,Sr-bearing aluminosilicates, silica gel and (hydr)oxides of hydrolysis prone waste components. The experimental results are compared with the predictions of a model that considers kinetically constrained glass dissolution and the precipitation of secondary phases, including a Cs,Sr-bearing aluminosilicate gel.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 757: Symposium II – Scientific Basis for Nuclear Waste Management XXVI , 2002 , II5.11
Copyright
Copyright © Materials Research Society 2003

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References

REFERENCES

[1] Abraitis, P. K., Livens, F. R., Monteith, J. E., Small, J. S., Trivedi, D. P., Vaughan, D. J. and Wogelius, R. A., Applied Geochemistry 15, 1399–1416 (2000).Google Scholar
[2] Mattigod, S. V., Serne, R. J., McGrail, B. P. and LeGore, L. V.. In Scientific Basis for Nuclear Waste Management XXV, edited by McGrail, B. P. and Cragnolino, G. A., (Mater. Res. Soc. Proc. 713) pp. 597–604 (2002).Google Scholar
[3] Abrajano, T. A., Bates, J. K., Woodland, A. B., Bradley, J. P., Bourcier, W. L., Clays and Clay Minerals 38, 83–105 (1990).Google Scholar
[4] Smith, B. F. L.. In Clay Mineralogy: Spectroscopic and Chemical Determinative Methods, Ed. Wilson, M. J., pp. 333–357 (1994).Google Scholar
[5] Abraitis, P. K., McGrail, B. P., Trivedi, D. P., Livens, F. R. and Vaughan, D. J., J. Nucl. Mat. 280, 196–205 (2000).Google Scholar
[6] Parkhurst, D. L. and Appelo, C. A. J.. U.S. Geological Survey Water- Resources Investigations Report 99–4259 (1999).Google Scholar