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Modelling the Activity of Sulphate-Reducing Bacteria and the Effects on Container Corrosion in an Underground Nuclear Waste Disposal Vault

Published online by Cambridge University Press:  10 February 2011

Fraser King ,
Miroslav Kolar ,
Simcha Stroes-Gascoyne ,
Peter Bellingham ,
James Chu  and
Paula V. Dawe
Fraser King
Affiliation:
Atomic Energy of Canada Limited, Whiteshell Laboratories, Pinawa, Manitoba, CANADA R0E 1L0, kingf@aecl.ca
Miroslav Kolar
Affiliation:
Atomic Energy of Canada Limited, Whiteshell Laboratories, Pinawa, Manitoba, CANADA R0E 1L0, kingf@aecl.ca
Simcha Stroes-Gascoyne
Affiliation:
Atomic Energy of Canada Limited, Whiteshell Laboratories, Pinawa, Manitoba, CANADA R0E 1L0, kingf@aecl.ca
Peter Bellingham
Affiliation:
Deep River Science Academy, Whiteshell Campus, Pinawa, Manitoba, CANADA R0E 1L0
James Chu
Affiliation:
Deep River Science Academy, Whiteshell Campus, Pinawa, Manitoba, CANADA R0E 1L0
Paula V. Dawe
Affiliation:
Deep River Science Academy, Whiteshell Campus, Pinawa, Manitoba, CANADA R0E 1L0
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Abstract

A mathematical model has been developed to predict the extent of sulphate reduction by sulphate-reducing bacteria (SRB) in an underground nuclear waste disposal vault and the consequences for corrosion of the waste package. The model is based on a series of massbalance equations that describe the kinetics of sulphate reduction by two types of SRB (one organotrophic and one chemoheterotrophic), the growth and death of SRB, the supply and consumption of nutrients (acetate and hydrogen) and reactants (SO42−) and the consumption of sulphide by precipitation with aqueous Fe(II) or by container corrosion. The disposal vault is described by a series of 1-D mass-transport barriers representing the buffer and backfill materials and fractured rock. The model can also be used to simulate the effects of γ-radiation and desiccation of the buffer and backfill materials on the extent of microbial activity.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 556: Symposium QQ – Scientific Basis for Nuclear Waste Management XXII , 1999 , 1167
Copyright
Copyright © Materials Research Society 1999

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References

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