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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Perko, Janez
European Commission
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2023A combined data-driven, experimental and modelling approach for assessing the optimal composition of impregnation products for cementitious materialscitations
- 2020The importance of physical parameters for the penetration depth of impregnation products into cementitious materials: Modelling and experimental studycitations
- 2020Influence of Micro-Pore Connectivity and Micro-Fractures on Calcium Leaching of Cement Pastes—A Coupled Simulation Approachcitations
- 2013Modelling long-term evolution of cementitious materials used in waste disposal. In: The Behaviours of Cementitious Materials in Long Term Storage and Disposal of Radioactive Waster
- 2013Concrete in engineered barriers for radioactive waste disposal facilities: phenomenological study and assessment of long term performance
- 2013A consistent approach for the development of a comprehensive data base of time-dependent parameters for concrete engineered barrierscitations
Places of action
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document
A consistent approach for the development of a comprehensive data base of time-dependent parameters for concrete engineered barriers
Abstract
This paper presents a novel approach for the development of a comprehensive data base of time-dependent hydraulic and transport parameters for concrete engineered barriers and the multi-layer cover of the future Dessel near surface repository for short-lived low-level waste. The parameter derivation is based on integration of selective 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. 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 novel approach is demonstrated by considering the pore water diffusion coefficient as an example.