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The Influence of Microbial Activity on the Movement of Uranium at Osamu Utsumi Mine, Poços De Caldas, Brazil

  • Julia M West (a1), Ian G Mckinley (a2) and Airton Vialta (a3)

Abstract

The Osamu Utsumi uranium mine, Poços de Caldas, Brazil is a roll front uranium deposit currently under investigation in an international natural analogue project involving Brazil, Sweden, Switzerland, the United Kingdom and the United States. This is a multi-disciplinary study (see the paper at this meeting by Smellie et al (1)), one component of which is an examination of the movement of natural series radionuclides across redox fronts. The processes at such fronts are analogous to those which could occur at radiolytic redox fronts found in the near- or far-field of deep repositories for HLW or spent fuel. Microbiological investigations have been carried out to determine the presence and activity of microbes known to be important in the uranium biogeochemical cycle; to define their importance in the movement of uranium across the redox front and to assess the significance of these observations to relevant safety assessment issues. This paper will summarise the results of these findings.

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References

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1. Smellie et al (at this meeting)
2. Poços de Caldas Project Progress Report September - November 1986. SKB, Box 5864, S-102 Stockholm, Sweden (1986)
3. Zajic, J. E., Microbial Biogeochemistry (Academic Press Inc, New York, 1969), pp. 179 - 196.
4. Poços de Caldas Project Progress Report March - May 1987. SKB, Box 5864, S-102 Stockholm, Sweden (1987)
5. Stanier, R. W., Adelberg, E. A., and Ingraham, J. C., General Microbiology, 4th ed. (MacMillan, Basingstoke, 1977). p. 28
6. McKinley, I. G., West, J. M. and Grogan, H. A., An analytical overview of the consequences of microbial activity in a Swiss HLW repository. NAGRA NTB 84–07 Baden Switzerland (1985)
7. Thauer, R. K., Jungerman, K. and Decker, K., Bacteriological Reviews. 41, pp. 100180 (1977)
8. Ehrlich, H. L., Geomicrobiology (Marcel Dekker Inc, New York, 1981) pp. 203 - 249
9. West, J. M., Christofi, N. and McKinley, I. G., Radioactive Waste Management and the Nuclear Fuel Cycle, 6, pp. 79 - 95 (1985)
10. Cramer, J. J., (pers comm)
11. Cathles, L. M., Math. Geol. 11, pp. 175 - 191 (1979)
12. McKinley, and Bradbury (at this meeting)

The Influence of Microbial Activity on the Movement of Uranium at Osamu Utsumi Mine, Poços De Caldas, Brazil

  • Julia M West (a1), Ian G Mckinley (a2) and Airton Vialta (a3)

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