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Diffusion of Technetium in Compacted Bentonites in the Reducing Condition with Corrosion Products of Iron

  • Yuji Kuroda (a1), K. Idemitsu (a1), H. Furuya (a1), Y. Inagaki (a1) and T. Arima (a1)...

Abstract

In the vicinity of a high-level waste repository, corrosion of carbon steel overpacks will create a reducing environment. Reducing conditions are expected to retard the migration of redox-sensitive radionuclides such as technetium.

The apparent diffusion coefficients of technetium were measured in compacted bentonites (Kunigel VI® and Kunipia F®, JAPAN) in contact with carbon steel and its corrosion products under reducing conditions or without carbon steel under oxidizing conditions for comparison. The apparent diffusion coefficients measured were 10-12 to 10-13 m2/s under oxidizing conditions and 10-12 to 10-13 m2/s under reducing conditions. There were significant effects of redox condition, dry density (0.2 to 2.3 g / cm3) and montmorillonite content (50% for Kunigel VI or 100% for Kunipia F) on the apparent diffusion coefficients. Montmorillonite density could be a good index to explain density dependence of the diffusion coefficients under both reducing and oxidizing conditions.

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1. Idemitsu, K., Furuya, H. and Inagaki, Y. in Scientific Basis for Nuclear Waste Management XVII, edited by Barkatt, A. and Van Konynenburg, Richard A. (Mater. Res. Soc. Proc. 412, Pittsburgh, PA, 1994), pp. 939945.
2. Idemitsu, K., Furuya, H. and Inagaki, Y. in Scientific Basis for Nuclear Waste Management XIX, edited by Murphy, William M. and Knecht, Dieter A. (Mater. Res. Soc. Proc. 412, Pittsburgh, PA, 1996), pp. 683690.
3. Torstenfelt, B. in Radiochimica Acta 39, pp. 97104 (1986).
4. Crank, J., The Mathematics of Diffusion, 2nd ed. (Clarendon Press, Oxford, 1975), pp. 1113.
5. Allard, B. in Scientific Basis for Nuclear Waste Management VII, edited by McVay, G.L. (Mater. Res. Soc. Proc. 263, North Holland, New York, 1984), pp. 219226.
6. Idemitsu, K., Furuya, H. and Inagaki, Y. in Scientific Basis for Nuclear Waste Management XVI, edited by Interrante, C.G. and Pabalan, R.T. (Mater. Res. Soc. Proc. 294, Pittsburgh, PA, 1993), pp. 467474.
7. Sato, H., Ashida, T., Kohara, Y. and Yui, M. in Scientific Basis for Nuclear Waste Management XVI, edited by Interrante, C.G. and Pabalan, R.T. (Mater. Res. Soc. Proc. 294, Pittsburgh, PA, 1993 ), pp. 403408.
8. Sawatsky, N.G. and Oscarson, D.W. in Soil Sci. Soc. Am. J., Vol 55, pp. 12611267.
9. Albinsson, Y., et al. in Radiochimica Acta 52/53, pp. 283286 ( 1991 ).
10. Skytte Jensen, B., Migration Phenomena of Radionuclides into the Geosphere (Harwood Academic Publishers, New York, NY, 1982), pp A44–A50. 916

Diffusion of Technetium in Compacted Bentonites in the Reducing Condition with Corrosion Products of Iron

  • Yuji Kuroda (a1), K. Idemitsu (a1), H. Furuya (a1), Y. Inagaki (a1) and T. Arima (a1)...

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