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Glass/Water Reaction with and without Bentonite Present - Experiment and Model

  • B. Grambow (a1), H. P. Hermansson (a2), I. K. Björner (a2) and L. Werme (a3)

Extract

In nuclear waste repository design bentonite has been included as part of the backfill for its sorbtive capacity and low water permeability. Nevertheless, it cannot keep the waste form dry once intrusion of groundwater has occured [1]. Leach experiments [2], [3] with the radioactive nuclear waste form borosilicate glass JSS-A have been performed with and without bentonite present to provide a database which allows the long term stability of the glass in aqueous environment to be forecasted and the chemical effects of bentonite to be studied.

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1. Pigford, T. H., et al.; Waste Isolation Systems Panel, National Research Council, National Academy Press, Washington, D.C. (1983)
2. Hermansson, H. P., Björner, I. K., Christensen, H., and Yokoyama, H.; JSS-Project - Technical Report 84-01, SKB, Stockholm, Sweden (1985)
3. Hermansson, H. P. et al. (1985), this volume
4. Grambow, B., in Advances in Ceramics 8, edited by Wicks, G., Ross, W. (Am. Ceram. Soc. Columbus, Ohio, 1984) pp. 474481
5. Strachan, D.M., Krupka, K.M., Grambow, B., Nucl. Chem. Waste 5, 8799 (1984)
6. Grambow, B., in Scientific Basis for Nuclear Waste Management VIII edited by Jantzen, C. M., Stone, J. A., Ewing, R. C., (Elsevier Science Publishers, New York, 1985) (in press)
7. Kittrick, J. A., in ACS Symposium Series 93, edited by Jenne, E.A., Am. Chem. Soc. (1919)
8. Christensen, H., Hermansson, H. P., ClarK, D. E., Werme, L., in Advances in Ceramics 8, edited by Wicks, G. and Ross, W., (Am. Ceram. Soc.), pp. 346–357 (1984)
9. Nogues, J.L., Vernaz, E.Y., Jacquet-Francillon, N., Pasquini, S., in Scientific Basis for Nuclear Waste Management VIII, eds. Jantzen, C. M., Stone, J. A., Ewing, R. C., (Elsevier Science Publishers, New York, 1985) (in press)
10. Parkhurst, D. L., Thorstensen, D. C., Plummer, L. N., (original PHREEQE) Water Resources Investigations 80–96 (U.S. Geol. Surv. Reston Virginia, 1980) extension to run precipitation controlled reaction by P. Offermann, HMI; updated with MINTEQ - database by W. Howden, K. Kruppka, PNL (1984)
11. Müller Vonmoos, M., Kahr, G., Technischer Bericht 83-12, Nagra, Baden (1983)
12. Lerman, A., Mackenzie, F. T., Bricker, O. P., Earth and Planetary Letters 25, 8288, (1975)
13. Tardy, Y., Fritz, B., Clay Minerals 16, 361 (1981)
14. Smellman, M., personal communication, VTT, Finland (1985)
15. Siever, R., Woodford, N., Geo. Cosmochim. Acta, 37, 18511880 (1973)
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