Modelling Colloidal Transport of Radionuclides Through Porous Media

by D. G. Bennett, WS Atkins Science & Technology, Surrey, United Kingdom,
S. K. Liew, WS Atkins Science & Technology, Surrey, United Kingdom,
L. Nanu, WS Atkins Science & Technology, Surrey, United Kingdom,
D. Read, WS Atkins Science & Technology, Surrey, United Kingdom,
J. B. Thomas, WS Atkins Science & Technology, Surrey, United Kingdom,



Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1993

Abstract:

General acknowledgement of the potential role of colloids in enhancing radionuclide transport has prompted the preliminary development of a mechanistic colloid transport model as part of collaborative laboratory-and field-based studies. The theoretical basis of the colloid transport model, which was developed within the coupled chemical transport model CHEMTARD, is described and emphasis is placed on the scientifically rigorous manner in which the important processes are represented. In addition, the model's successful testing against the speciation/sorption code HYDRAQL and analytical solutions to the transport equations are summarized. Further developments will include the representation of colloid filtration and coagulation, with testing against both laboratory and field data.

Subject Headings: Colloids | Laboratory tests | Field tests | Radioactive materials | Mathematical models | Transport phenomena | Porous media flow

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