This paper presents a consistent approach for the development of a comprehensive data base of time-dependent hydraulic and transport parameters for concrete engineered barriers of the future Dessel near surface repository for low level waste. The parameter derivation is based on integration of selected data obtained through an extensive literature review, data from experimental studies on cementitious materials specific for the Dessel repository and numerical modelling using physically-based models of water and mass transport. Best estimate parameter values for assessment calculations are derived, together with source and expert range and their probability density function wherever the data was sufficient. We further discuss a numerical method for upscaling laboratory derived parameter values to the repository scale; the resulting large-scale effective parameters are commensurate with numerical grids used in models for radionuclide migration. To accommodate different levels of conservatism in the various assessment calculations defined by ONDRAF/NIRAS, several sets of parameter values have been derived based on assumptions that introduce different degrees of conservatism. For pertinent parameters, the time evolution of such properties due to the long-term concrete degradation is also addressed. The implementation of the consistent approach is demonstrated by considering the pore water diffusion coefficient as an example.
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ASME 2013 15th International Conference on Environmental Remediation and Radioactive Waste Management
September 8–12, 2013
Brussels, Belgium
Conference Sponsors:
- Nuclear Engineering Division
- Environmental Engineering Division
ISBN:
978-0-7918-5601-7
PROCEEDINGS PAPER
A Consistent Approach for the Development of a Comprehensive Data Base of Time-Dependent Parameters for Concrete Engineered Barriers
Suresh C. Seetharam,
Suresh C. Seetharam
Belgian Nuclear Research Centre SCK•CEN, Mol, Belgium
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Dirk Mallants,
Dirk Mallants
CSIRO Land and Water, Urrbrae, SA, Australia
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Janez Perko,
Janez Perko
Belgian Nuclear Research Centre SCK•CEN, Mol, Belgium
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Diederik Jacques
Diederik Jacques
Belgian Nuclear Research Centre SCK•CEN, Mol, Belgium
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Suresh C. Seetharam
Belgian Nuclear Research Centre SCK•CEN, Mol, Belgium
Dirk Mallants
CSIRO Land and Water, Urrbrae, SA, Australia
Janez Perko
Belgian Nuclear Research Centre SCK•CEN, Mol, Belgium
Diederik Jacques
Belgian Nuclear Research Centre SCK•CEN, Mol, Belgium
Paper No:
ICEM2013-96219, V001T01A038; 8 pages
Published Online:
February 18, 2014
Citation
Seetharam, SC, Mallants, D, Perko, J, & Jacques, D. "A Consistent Approach for the Development of a Comprehensive Data Base of Time-Dependent Parameters for Concrete Engineered Barriers." Proceedings of the ASME 2013 15th International Conference on Environmental Remediation and Radioactive Waste Management. Volume 1: Low/Intermediate-Level Radioactive Waste Management; Spent Fuel, Fissile Material, Transuranic and High-Level Radioactive Waste Management. Brussels, Belgium. September 8–12, 2013. V001T01A038. ASME. https://doi.org/10.1115/ICEM2013-96219
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