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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: daqing.cui@studsvik.se
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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

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References

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