Hostname: page-component-745bb68f8f-l4dxg Total loading time: 0 Render date: 2025-01-29T23:42:40.489Z Has data issue: false hasContentIssue false
  • English
  • Français

Migration Behavior of Uranium Series Nuclides in Altered Quartz-Chlorite Schist

Published online by Cambridge University Press:  21 February 2011

T. Ohnuki ,
T. Murakami ,
K. Sekine ,
N. Yanase ,
H. Isobe  and
Y. Kobayashi
T. Ohnuki
Affiliation:
Department of Environmental Safety Research, Japan Atomic Energy Research Institute, Tokai, Ibaraki, 319–11, Japan
K. Sekine
Affiliation:
Department of Environmental Safety Research, Japan Atomic Energy Research Institute, Tokai, Ibaraki, 319–11, Japan
N. Yanase
Affiliation:
Department of Environmental Safety Research, Japan Atomic Energy Research Institute, Tokai, Ibaraki, 319–11, Japan
H. Isobe
Affiliation:
Department of Environmental Safety Research, Japan Atomic Energy Research Institute, Tokai, Ibaraki, 319–11, Japan
Y. Kobayashi
Affiliation:
Department of Environmental Safety Research, Japan Atomic Energy Research Institute, Tokai, Ibaraki, 319–11, Japan
Get access

Abstract

The migration behavior of uranium series nuclides in an altered quartz-chlorite schist has been studied by utilizing data on the activity distributions of uranium series nuclides at Koongarra in the Northern Territory of Australia. The variation of 230Th/234U activity ratios (ARs) with distance along surface (2 m depth), intermediate (16 m) and deep (31 m) layers show different trends in the three layers parallel to the water flow. The relationship between the 234U/238U and 230Th/238U ARs reveals that the mobility of the uranium series nuclides is in order 238U, 234U and 230Th, and that the retardation factors oft 234U are greater than those of 238U by a factor of 1.1, 1.9 and 1.0 in the surface, intermediate and deep layers, respectively. X-ray diffraction patterns show different mineral assemblages, which are the alteration products of chlorite at the three layers. These results imply that the migration behavior of uranium series nuclides at each depth would be related to the alteration of chlorite.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 176: Symposium U – Scientific Basis for Nuclear Waste Management XIII , 1989 , 607
Copyright
Copyright © Materials Research Society 1990

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1] Snelling, A. A., in Proceedings of IAEA International Uranium Symposium in the Pine Creek Geosyncline, edited by Ferguson, J. and Goleby, A. B. (IAEA, Vienna, 1980) p. 487.Google Scholar
[2] Airey, P. L., Chem. Geol. 55, 255 (1986).Google Scholar
[3] Airey, P. L. and Ivanovich, M., Chem. Geol. 55, 203 (1986).Google Scholar
[4] Dibble, W. E. Jr, and Tiller, W. A., Clays and Clay Minerals 29, 323 (1981).Google Scholar
[5] Isobe, H. and Murakami, T., submitted to Radiochim. Acta.Google Scholar
[6] Lever, D. A., NUREG/CR-5040 (AAEC/C55), Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2232, Australia (1987), p. 179.Google Scholar
[7] Sill, C. W., Analytical Chem. 49, 618 (1977).Google Scholar
[8] Nightingale, T., NUREG/CR-5040 (AAEC/C55), Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2232, Australia (1987), p. 41.Google Scholar
[9] Osmond, J. K., Cowart, J. B., and Ivanovich, M., Int. J. Appl. Radiat. Isot. 34, 283 (1983).Google Scholar
[10] Fleischer, R. L. and Raabe, O. G., Geochim. Cosmochim. Acta 42, 973 (1978).Google Scholar
[11] Eyal, Y. and Fleischer, R. L., Geochim. Cosmochim. Acta 49, 1155 (1965).Google Scholar
[12] Eyal, Y., Lumpkin, G. R. and Ewing, R. C., in Scientific Basis for Nuclear Waste Management X, edited by Bates, J. K. and Seefeldt, W. B. (Materials Research Society, Pittsburgh, PA, 1987), p. 635.Google Scholar
[13] Fleischer, R. L., Geochim. Cosmochim. Acta 52, 1459 (1988).Google Scholar
[14] Shirvington, P. J., Geochim. Cosmochim. Acta 47, 403 (1983).Google Scholar