Search results for "Radioactive waste disposal"

showing 2 items of 2 documents

Increasing understanding and confidence in THM simulations of engineered barrier systems

2020

Previous studies on the modelling of coupled thermo-hydro-mechanical (THM) processes in bentonite-based engineered barrier systems (EBSs) showed the sensitivity of the output quantities to changes in the input parameters. To investigate the effects of uncertainties on the modelling results, to improve the understanding of the coupled processes active in the repository near field and to gain in-depth understanding of model uncertainties of different codes, a sensitivity analysis and code comparison of EBS simulations was performed within the Task Force on Engineered Barrier Systems. The analysis included variations in material parameter values, boundary and initial conditions, considered phy…

Engineering CivilBentonite deposits0211 other engineering and technologiesRadioactive waste disposal in the groundEngineering MultidisciplinaryEnvironmental engineeringBentonita -- Propietats mecàniques02 engineering and technology010501 environmental sciencesManagement Monitoring Policy and Law01 natural sciencesTHMGeochemistry and PetrologyEnvironmental ChemistrySensitivity (control systems)Engineering Ocean:Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament dels residus [Àrees temàtiques de la UPC]Abocadors de residus radioactiusWaste Management and DisposalEngineering AerospaceEngineering Biomedical021101 geological & geomatics engineering0105 earth and related environmental sciencesNature and Landscape ConservationWater Science and TechnologySettore ICAR/07 - GeotecnicaWaste managementRadioactive wasteGeotechnical Engineering and Engineering GeologyComputer Science Software EngineeringEngineering MarineEngineering ManufacturingEngineering MechanicalRadioactive waste disposalBentoniteEngineering IndustrialEnvironmental scienceEngineered BarriersNumerical methods:Enginyeria civil::Geotècnia::Mecànica de sòls [Àrees temàtiques de la UPC]
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Water retention behaviour and microstructural evolution of MX-80 bentonite during wetting and drying cycles

2014

MX-80 bentonite used in engineered barrier systems would be subjected to wetting and drying cycles. To assess the response of the material under such circumstances, a comprehensive experimental characterisation of the water retention behaviour of compacted MX-80 granular bentonite was performed in this study. A new methodology is proposed to investigate this behaviour under a constant volume condition for specimens prepared at different dry densities. The material was subjected to different hydraulic paths, including cyclic variations of the water content. As a result, an irreversible modification of the retention behaviour was observed when the material approached a fully saturated state …

Microstructural evolutionMaterials scienceExpansive clayExpansive soilFabric/structure of soilGeotechnical Engineering and Engineering GeologyPartial saturationWater retentionPartial saturationVolume (thermodynamics)Radioactive waste disposalBentoniteParticle-scale behaviourEarth and Planetary Sciences (miscellaneous)medicineClayGeotechnical engineeringWettingmedicine.symptomComposite materialWater contentGéotechnique
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