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T2GGM: A Coupled Gas Generation Model for Deep Geologic Disposal of Radioactive Waste

Avis, John, Suckling, Paul, Calder, Nicola, Walsh, Robert, Humphreys, Paul and King, Fraser (2014) T2GGM: A Coupled Gas Generation Model for Deep Geologic Disposal of Radioactive Waste. Nuclear Technology, 187 (2). pp. 175-187. ISSN 0029-5450

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Deep geologic disposal of radioactive waste is being planned in a number of international programs. Within a deep geologic repository (DGR), gases can be generated by corrosion of metals and degradation of organics. Reactions, and thus gas generation rates, are dependent upon pressures, temperature, and the availability of water or water vapor within the repository. Furthermore, many reactions consume water. Consumption rates and repository state are not known a priori and are in general coupled processes. A numeric model of coupled gas generation and transport has been developed and implemented in the T2GGM code. T2GGM consists of a gas generation model (GGM), which calculates rates of gas generation and water consumption within the DGR due to corrosion and microbial degradation of the waste packages, integrated with the widely used two-phase-flow code TOUGH2, which models the subsequent two-phase transport of the water and gas through the repository and into the DGR shafts and geosphere. T2GGM has been applied to assess gas transport from a proposed low- and intermediate-level radioactive waste DGR and to study the impact of container corrosion in a hypothetical used fuel DGR.

Item Type: Article
Additional Information: Reproduced by permission of the American Nuclear Society.© Copyright 2014 by the American Nuclear Society, La Grange Park, Illinois
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Q Science > QE Geology
Schools: School of Applied Sciences
Related URLs:
Depositing User: Paul Humphreys
Date Deposited: 05 Aug 2014 13:55
Last Modified: 02 Sep 2014 11:29


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