Hostname: page-component-84b7d79bbc-lrf7s Total loading time: 0 Render date: 2024-08-01T02:03:39.188Z Has data issue: false hasContentIssue false
  • English
  • Français

Solubility of Plutonium in Water Containing Carbonate under Reducing Conditions

Published online by Cambridge University Press:  01 February 2011

Arvid Ödegaard-Jensen ,
Yngve Albinsson  and
Hans Nilsson
Arvid Ödegaard-Jensen
Affiliation:
Department of Materials and Surface Chemistry, Nuclear Chemistry Chalmers University of Technology
Yngve Albinsson
Affiliation:
Department of Materials and Surface Chemistry, Nuclear Chemistry Chalmers University of Technology
Hans Nilsson
Affiliation:
Department of Materials and Surface Chemistry, Nuclear Chemistry Chalmers University of Technology
Get access

Abstract

In order to investigate the dissolution of plutonium(III) under reducing condition and in a carbonate rich water solid phases of plutonium hydroxide and carbonate were made. The still wet solid phases were placed in vessels which contained 1 M NaClO4. The atmosphere in the vessels was either H2 or a mixture of H2 and 0.03% CO2.

The preliminary results shows that after some time the plutonium concentration in the solutions reached a value between 10−9 M and 10−7 M. The pH in the solutions is dependent of the atmosphere. In a pure H2 atmosphere the pH is changing over time whereas in the H2+CO2 atmosphere the pH stays between 7 and 7.5. At pH 8 the total carbonate concentration in the water was between 10−4 M and 10−3 M. This is the same order of magnitude as the ground water surrounding the proposed repository.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 807: Symposium Scientific Basis for Nuclear Waste Management XXVII , 2003 , 585
Copyright
Copyright © Materials Research Society 2004

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. Wikberg, P., Gustafson, G., Rhén, I. and Stanfors, R., “Äspö Hard Rock Laboratory, Evaluation and conceptual modelling based on pre-investigations 1986–1990”, SKB TR 91–22, 213 pp (1991)Google Scholar
2. Hagan, P.G., Navratil, J.D., Cichorz, R.S., “Characterization of Pu(III) carbonate”, J. inorg. nucl. Chem. 43, 1054–1055 (1981).Google Scholar
3. Nilsson, H., Albinsson, Y., Skarnemark, G., “Dissolution of plutonium(III) hydroxide at 50 bar H2”, submitted to MRS 2003 Kalmar.Google Scholar
4. Felmy, A. R., Rai, D., Schramke, J. A., and Ryan, J. L., “The Solubility of Plutonium Hydroxide in Dilute Solution and High-Ionic-Strength Chloride Brines”, Radiochimica Acta 48, 29–35 (1989)Google Scholar
5. Haschke, J.M., Oversby, V.M., “Plutonium chemistry: a synthesis of experimental data and a quantitative model for plutonium oxide solubility”, J. Nucl. Mater. 305, 187–201 (2002)Google Scholar