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Correlation of Laboratory and Stripa Field Leaching Studies

  • B. K. Zoitos (a1), D. E. Clark (a1), A. R. Lodding (a2) and G. G. Wicks (a3)

Abstract

A variety of surface sensitive techniques has been used to assess surface layers formed on SRL 165 waste glass specimens from the Stripa burial study and from a laboratory study designed to simulate conditions of the Stripa environment. The laboratory study included static and slow flow tests carried out for periods up to 6 and 24 months, respectively. Comparisons of leached layers formed in the two studies are based upon secondary ion mass spectrometry (SIMS), Fourier transform infrared reflection spectroscopy (FTIRRS), and scanning electron microscopy-electron microprobe (SEM-EMP) analysis.

Results demonstrate that surface layers having similar trends in elemental profiles were developed in both lab and field tests. It was also found that both sets of samples showed similar changes in FTIRR spectra. One significant difference between the lab and field samples was that surface alteration, as indicated by changes in FTIRR spectra and leached layer thickness (from SIMS), occurred more rapidly in the lab tests.

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1. Clark, D.E., Zhu, B.F., Robinson, R.S., and Wicks, G.G., in Advances in Ceramics, Vol. 8: Nuclear Waste Management, edited by Wicks, G.G. and Ross, W.A. (The American Ceramic Society, Westerville, OH, 1983), pp. 324336.
2. Hench, L.L., Lodding, A.R., and Werme, L., in Advances in Ceramics, Vol. 8: Nuclear Waste Management, edited by Wicks, G.G. and Ross, W.A. (The American Ceramic Society, Westerville, OH, 1983), pp. 310323.
3. Clark, D.E., Zhu, B.F., Hench, L.L., Wicks, G.G. and Werme, L., Rivista Della Stazione Sperimentale Del Vitro, 5, pp. 185195, (1984).
4. Zhu, B.F., Clark, D.E., Hench, L.L., Wicks, G.G. and Werme, L., in Scientific Basis for Nuclear Waste Management VIII, edited by Jantzen, C.M., Stone, J.A., and Ewing, R.C. (Mater. Res. Soc. Proc. 44, Pittsburgh, PA 1985) pp. 187194.
5. Zhu, B.F., Clark, D.E., Hench, L.L. and Wicks, G.G., J. Non-Cryst. Solids, 80, pp. 324334 (1986).
6. Lodding, A.R., Engstrom, E.U., Clark, D.E., Werme, L.O., and Wicks, G.G., in Advances in Ceramics, Vol. 20: Nuclear Waste Management II, edited by Clark, D.E., White, W.B., and Machiels, A.J. (The American Ceramic Society, Westerville, OH, 1987) pp. 567581.
7. Zhu, B.F., Clark, D.E., Lodding, A.R., and Wicks, G.G., in Advances in Ceramics, Vol. 20: Nulcear Waste Management II, edited by Clark, D.E., White, W.B., and Machiels, A.J. (The American Ceramic Society, Westerville, OH, 1987) pp. 591599.
8. Zoitos, B.K. and Clark, D.E., to be published in Materials Stability and Environmental Degradation, (Mater. Res. Soc. Proc. 125, Pittsburgh, PA 1988).
9. Lodding, A.R., Odelius, H., Clark, D.E. and Werme, L.O., Mikrochimica Acta, 11, pp. 145161 (1985).

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