Hostname: page-component-848d4c4894-x5gtn Total loading time: 0 Render date: 2024-05-11T10:24:58.384Z Has data issue: false hasContentIssue false
  • English
  • Français

Diffusion of Lead from a Perforated Titanium-Shell Lead-Matrix Container

Published online by Cambridge University Press:  25 February 2011

P. Mani Mathew ,
Paul A. Krueger  and
M. Krause
P. Mani Mathew
Affiliation:
AECL Research Whiteshell Laboratories Pinawa, Manitoba ROE ILO
Paul A. Krueger
Affiliation:
AECL Research Whiteshell Laboratories Pinawa, Manitoba ROE ILO
M. Krause
Affiliation:
AECL Research Whiteshell Laboratories Pinawa, Manitoba ROE ILO
Get access

Abstract

This paper describes experiments and analyses conducted to determine the range of apparent diffusion coefficients of lead diffusing from an intentionally perforated lead-matrix titanium-shell container into a compacted 1:1 (by dry mass) silica-sand/sodium-bentonite buffer mixture saturated with Standard Canadian Shield Saline Solution at 363 K. Analysis of the experimental data using a single apparent diffusion coefficient could not explain the findings. A possible explanation of the behaviour is presented here. It uses a 2–D finite-element model with six lead species having six different apparent diffusion coefficients. The model can explain the data satisfactorily. Sixty-three percent of the source concentration consisted of slow-moving species, with an apparent diffusion coefficient of 10-15 m2 /s, whereas the fastest species, with an apparent diffusion coefficient of 10-10 m2 /s, constituted only three percent of the source concentration.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 257: Symposium – Scientific Basis for Nuclear Waste Management XV , 1991 , 431
Copyright
Copyright © Materials Research Society 1992

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. Nuttall, K., Crosthwaite, J.L., McKay, P., Mathew, P.M., Teper, B., Maak, P.Y.Y. and Moles, M.D.C.. 1983. The Canadian Container Development Program for Fuel Isolation. Materials Research Society Symposia Proceedings 15 (Scientific Basis for Nuclear Waste Management VI), 677–684.Google Scholar
2. Mathew, P.M., Nadeau, J.S., Weinberg, F., Chaklader, A.C.D. and Nuttall, K.. 1983. Investment of Irradiated Reactor Fuel in a Metal Matrix. Canadian Metallurgical Quarterly L2(1), 107–115.Google Scholar
3. Mathew, P.M.. 1987. Metal Matrices for Nuclear Fuel Waste Disposal. In the Geological Disposal of High Level Radioactive Wastes (edited by Brookins, D.). Theophrastus Publications, S.A. Zographou, Athens, Greece, 315–347.Google Scholar
4. Mathew, P.M. and Krueger, P.A.. 1990. Statistically Designed Lead Corrosion Experiments for Nuclear Waste Disposal. Materials Research Society Symposia Proceedings 212 (Scientific Basis for Nuclear Waste Management XI), 327–333.Google Scholar
5. Shackelford, C.D.. 1991. Laboratory Diffusion Testing for Waste Disposal - A Review - Journal of Contaminant Hydrology 2(3), 177–217.Google Scholar
6. ABAQUS Users' Manual, Version 4.8, 1988. Hibbit, Karlsson and Sorenson, Inc.Google Scholar
7. Oscarson, D.W. and Dixon, D.A., 1989. Elemental Mineralogical and Pore-Solution Composition of Selected Canadian Clays, Atomic Energy of Canada Limited Report AECL-9891.Google Scholar
8. Rickard, D.T. and Nriagu, J.O.. 1978. Aqueous Environmental Chemistry of Lead. In the Biogeochemistry of Lead in the Environment, Part A. Ecological Cycles (edited by Nriagu, J.O.). Elsevier/North-Holland Biomedical Press, N.Y., 219–184.Google Scholar