Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-17T20:14:16.296Z Has data issue: false hasContentIssue false
  • English
  • Français

On Metal Aggregates in Spent Fuel, Synthesis and Leaching of Mo-Ru-Pd-Rh Alloy

Published online by Cambridge University Press:  21 March 2011

Daqing Cui ,
Trygve Eriksen  and
Ulla-Britt Eklund
Daqing Cui
Affiliation:
Department of Chemistry, Nuclear Chemistry, Royal Institute of Technology, SE-100 44 Stockholm, Sweden
Trygve Eriksen
Affiliation:
Studsvik Nuclear AB, SE-611 82 Nyköping, Sweden
Ulla-Britt Eklund
Affiliation:
Department of Chemistry, Nuclear Chemistry, Royal Institute of Technology, SE-100 44 Stockholm, Sweden Email: [email protected]
Get access

Abstract

The results of leaching tests on the synthesised 46%Mo-29%Ru-21%Pd-4%Rh alloy show selective release Mo at both reducing and air saturated conditions. The leach rate increases with rising redox potential (Eh) of leaching solution and temperature, and slightly decreases with leaching time. The electrochemical study indicates that the alloy is more stable than carbon steel against corrosion but less stable than copper and stainless steel. Based on the leach rates of Mo, Ru, Rh, Pd and oxidation potentials of these four metals and Tc0, the leach rates of Tc from alloy aggregates, 40%Mo, 30%Ru, 10%Tc, 15% Pd, 5%Rh in spent fuel at reducing and air saturated conditions are estimated, to be 4.10−9 g.cm−2.day−1 and 4. 10−7 g.cm−2.day−1, respectively.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 663: Symposium – Scientific Basis for Nuclear Waste management XXIV , 2000 , 427
Copyright
Copyright © Materials Research Society 2001

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. Kleykamp, H., Journal of Nuclear Materials, 167, 49–63 (1989)Google Scholar
2. Tomas, L:E., Einziger, R. E., and Woodley, R.E. J. Nucl. Mater. 166 243–251 (1989)Google Scholar
3. Forsyth, R. S., Spent Fuel corrosion: Study of the Tc-99 source term for the BWR and PWR reference fuel, SKB arbete report 94-07, (1996)Google Scholar
4. Pourbaix, M., ed. Atlas of Electrochemical Equilibria in Aqueous Solutions, 2nd edn. Nat. Ass. Corrosion Engineers, Houston, Texas, and CEBELCOR, Brussels (1974)Google Scholar
5. Cui, D., Eriksen, T., Environ. Sci. & Technol., Am. Chem. Soc. Vol. 30, 2259–2262 (1996)Google Scholar
6. Cui, D., Eriksen, T., Environ. Sci. & Technol., Am. Chem. Soc. Vol. 30, 2263–2269 (1996)Google Scholar
7. Bruno, J., Cera, E., Duro, L., Pabo, J. De. and Eriksen, T., Development of the model to the minor radionuclides, SKB Technical Report TR-98-22, Stockholm 1998 Google Scholar
8. Gauthier-Lafaye, F., Blanc, P. L., Geochimica et Cosmochimica 60 p 4861–4852 1996 Google Scholar
9. Stumm, W. and Morgan, J. J., Kinetics of redox procesess in Aquatic Chemistry third edition (1995) pp 708.Google Scholar
10. Röllin, S. 1, Spahiu, K. 2, Eklund, U-B. 1, Determination of dissolution rates of spent fuel in carbonate solutions under different redox conditions with a flow-through experiment. Journal of Nuclear Materials, 199 (in press).Google Scholar
11. Jones, D. A., ed., Principles and Prevention of Corrosion, Macmillan Publishing Company, New York (1992), pp.142–164.Google Scholar
12. Mansfeld, F., Advances in Corrosion Science and Technology, Vol. 6, Fontana, M. G. and Staehle, R. W., eds., Plenum Press (1976), p.163.Google Scholar