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X-RAY Photoelectron Spectroscopic Study of Cigar Lake Uranium Ore: A Natural Analog for Used Fuel

Published online by Cambridge University Press:  25 February 2011

S. Sunder ,
J.J. Cramer  and
N.H. Miller
S. Sunder
Affiliation:
AECL Research, Whiteshell Laboratories, Pinawa, Manitoba, Canada. ROE 1LO
J.J. Cramer
Affiliation:
AECL Research, Whiteshell Laboratories, Pinawa, Manitoba, Canada. ROE 1LO
N.H. Miller
Affiliation:
AECL Research, Whiteshell Laboratories, Pinawa, Manitoba, Canada. ROE 1LO
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Abstract

X-ray photoelectron spectroscopy (XPS) was used to study samples from the Cigar Lake uranium deposit in northern Saskatchewan. Two uranium-rich sections, CS-615 and CS-620 were studied. Peaks due to U, 0, C, Pb, Si, Ca, Al, S, Cu and Th were seen in the XPS spectra. Concentrations of Pb of up to 14 wt% were measured by XPS and correspond to the Pb ingrowth by radioactive decay during the 1.3 billion years since the ore was formed. High-resolution spectra were recorded for the U, Pb, 0, and C bands. Lead was in the +2 oxidation state in all samples. The carbon signal indicated the presence of organic carbon, while the oxygen bands indicated the presence of significant amounts of water in the samples. The samples from the CS-615 section had U6+/U4+ ratios between 0.16 and 0.29. However, the U6+/U4+ ratios for section CS-620 were about 0.7 but this is attributed to oxidation of the ore by water during the drilling and cutting processes. The significance of the results for disposal concepts in nuclear fuel waste management programs is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 257: Symposium – Scientific Basis for Nuclear Waste Management XV , 1991 , 449
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCES

1. Werme, L.O. and Forsyth, R.S., in Scientific Basis for Nuclear Vaste Management XI, Apted, N.J. and Westerman, R.E. (eds). Materials Research Soc. Symp. Proc. 112, pp. 443–452 (1988).Google Scholar
2. Johnson, L.H. and Shoesmith, D.W.. in Radioactive Waste Forms for the Future, Lutze, W. and Ewing, R.C., (eds), Elsevier Sc. Publ. B.V. pp. 635–698 (1988).Google Scholar
3. Langmuir, D., Geochim. Cosmochim. Acta, 42, 547 (1978).CrossRefGoogle Scholar
4. Parks, G.A. and Pohl, D.C.. Geochim. Cosmochim. Acta, 52, 863 (1988).Google Scholar
5. Lemire, R.J.. Effects of high ionic strength groundwaters on calculated equilibrium concentrations in the uranium-water system. Atomic Energy of Canada Limited Report, AECL-9549; (1988).Google Scholar
6. Bruno, J., Casas, I. and Puigdomenech, I.. Radiochimica Acta, 44/45, 11 (1988).CrossRefGoogle Scholar
7. Sunder, S., Boyer, G.D. and Miller, N.H.. J. Nucl. Mater. 175, 163 (1990).Google Scholar
8. Sunder, S. and Shoesmith, D.W.. 1991. Chemistry of U02Fuel Dissolution in Relation to the Disposal of Used Nuclear Fuel. Atomic Energy of Canada Report, AECL-10395 (1991).Google Scholar
9. Ewing, R.C. and Jercinovic, N.J., in Scientific Basis for Nuclear Waste Management X, Bates, J.K. and Seefeldt, W.B. (Eds.), Materials Research Soc. Symp. 84, pp. 67–82 (1987).Google Scholar
10. Cramer, J.J.. A natural analog for a fuel waste disposal vault. Canadian Nuclear Society, 2nd Int. Conf. Rad. Waste Manag., Proc., 697 (1986).Google Scholar
11. Cramer, J.J.. Natural analog studies on the Cigar Lake uranium deposit: an update. In: CEC Natural analogue working group. Ed.: Cöme, B. and Chapman, N.A.. CEC Report EUR 11725 EN, 50 (1988).Google Scholar
12. Cramer, J.J., Vilks, P., Larocque, J.P.A.. Near-field analog features from the Cigar Lake uranium deposit. In: Natural Analogues in Radioactive Waste Disposal, Cöme, B. and Chapman, N.A. (Eds). CEC Public., EUR 11037 EN, 59 (1987).Google Scholar
13. McConnell, D.B. and Cramer, J.J.. Simulating the movement of radium and lead away from the Cigar Lake uranium deposit. In: Natural Analogues in Radioactive Waste Disposal, Ed.: Cöme, B. and Chapman, N.A., CEC Public., EUR 11037, pp. 179–190 (1987).Google Scholar
14. Sunder, S., Taylor, P. and Cramer, J.J.. Scientific Basis for Nuclear Waste Management XI, Apted, N.J. and Westerman, R.E. (Eds.), Materials Research Soc. Symp. Proc. 112, pp. 465–472 (1988).Google Scholar
15. Goodwin, B.W., Cramer, J.J. and McConnell, D.B.. The Cigar Lake uranium deposit: an analogue for nuclear fuel waste disposal. In: Natural analogues in performance assessment for the disposal of long-lived radioactive wastes. IAEA Tech. Rep., 304, pp. 37–45 (1989).Google Scholar
16. Bruneton, P.. Geology of the Cigar Lake uranium deposit (Saskatchewan, Canada). In: Conference on Economic Minerals in Saskatchewan, Sask. Geol. Soc., Spec. Publ., 8, 99–119 (1986).Google Scholar
17. Wagner, C.D., Riggs, W.M., Davis, L.E., Moulder, J.F. and Muilenberg, G.E., Handbook of X-ray Photoelectron Spectroscopy, Perkin-Elmer. Corporation Physical Electronics Division, Eden Praire, Minnesota, U.S.A., (1979).Google Scholar
18. McIntyre, N.S., Sunder, S., Shoesmith, D.W. and Stanchell, F.W., J. Vac. Sci. Technol. 18, 714 (1981).CrossRefGoogle Scholar
19. Allan, G.C., Tempest, P.A. and Tyler, J.W.. J. Chem. Soc. Faraday Trans. 1, 83, 925–935 (1987).Google Scholar
20. Verbist, J., Riga, J., Pireaux, J.J., and Caudano, R.. J. Electron Spectrosc. Rel. Phen. 5, 193 (1974).Google Scholar
21. Gascoyne, M. and Kamineni, D.C.. Groundwater Chemistry and Fracture Mineralogy in the Uhiteshell Research Area: Supporting Data for the Geosphere and Biosphere Transport Models. Atomic Energy of Canada Limited Technical Record, TR-516 (in preparation).Google Scholar