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Modelling the Effects of Evolving Redox Conditions on the Corrosion of Copper Containers

  • F. King (a1), D. M. LeNeveu (a1) and D. J. Jobe (a1)

Abstract

The corrosive environment around the containers in a Canadian nuclear fuel waste disposal vault will change over time from “warm and oxidizing” to “cool and anoxic”. As the conditions change, so too will the corrosion behaviour of the containers. For copper containers, uniform corrosion and, possibly, pitting will occur during the initial aggressive phase, to be replaced by slow uniform corrosion during the long-term anoxic period.

The corrosion behaviour of copper has been studied over a range of conditions representing all phases in the evolution of the vault environment. The results of these studies are summarized and used to illustrate how a model can be developed to predict the corrosion behaviour and container lifetimes over long periods of time. Lifetimes in excess of 106 a are predicted for 25-mm-thick. copper containers under Canadian disposal conditions.

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References

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1 King, F., LeNeveu, D.M., Ryan, S.R. and Litke, C.D., in Lifetime Predictions of Corrodible Structures, edited by Parkins, R.N. (NACE International, Houston, TX), to be published.
2 King, F. and LeNeveu, D.M., in Nuclear Waste Packaging. FOCUS ’91 (American Nuclear Society, La Grange Park, IL, 1992) pp. 253261.
3 Gascoyne, M. and Kamineni, D.C., Atomic Energy of Canada Limited Technical Record, TR-516, C0G-92-24, 1992.
4 Shoesmith, D.W., Ikeda, B.M. and King, F., in NATO Advanced Research Workshop on Modelling Aqueous Corrosion (Kluwer Academic Publishers, Dordrecht), in press.
5 Shoesmith, D.W., Ikeda, B.M. and King, F., in Scientific Basis for Nuclear Waste Management XV, edited by Sombret, C.G. (Mater. Res. Soc. Proc. 257, Pittsburgh, PA, 1992) pp. 407414.
6 King, F., Litke, C.D. and Ryan, S.R., Corr. Sci. 33, 1979 (1992).
7 Litke, C.D., Ryan, S.R. and King, F., Atomic Energy of Canada Limited Report, AECL-10397, C0G-91-304, 1992.
8 King, F. and Tang, Y., unpublished results.
9 King, F., Litke, C.D. and Ryan, S.R., in CORROSION 92 (NACE International, Houston, TX, 1992) Paper 119.
10 Lucey, V.F., Brit. Corros. J. 2, 175 (1967).
11 King, F. and Litke, C.D., Atomic Energy of Canada Limited Reports, AECL-9571 to 9573, 1989, and unpublished results.
12 Deslouis, C., Tribollet, B., Mengoli, G. and Musiani, M.M., J. Appl. Electrochem. 18, 374, 384 (1988).
13 Romanoff, M., Underground Corrosion, NBS Circular 579 (National Bureau of Standards, Washington, D.C., 1957).
14 Bresle, A., Saers, J. and Arrhenius, B., Swedish Nuclear Fuel Supply Company Technical Report, KBS-TR-83-05, 1983.
15 Simmons, G.R. and Baumgartne, P.r, Atomic Energy of Canada Limited Report, AECL-10715, COG-93-5, 1994.
16 Swedish Corrosion Institute, Swedish Nuclear Fuel Supply Company Technical Report, KBS-TR-83-24, 1983.

Modelling the Effects of Evolving Redox Conditions on the Corrosion of Copper Containers

  • F. King (a1), D. M. LeNeveu (a1) and D. J. Jobe (a1)

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