Self-sealing of boom clay after gas transport
In the geological disposal of high-level radioactive waste in argillaceous rocks, studying the barrier integrity after gas transport and the pathway closure thanks to self-sealing capacity is a crucial aspect for the safety assessment. This paper presents experimental research in Boom Clay (a potent...
| Autores: | , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2023 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/406488 |
| Acceso en línea: | https://hdl.handle.net/2117/406488 https://dx.doi.org/10.1007/s00603-023-03529-3 |
| Access Level: | acceso abierto |
| Palabra clave: | Clay--Permeability Radioactive waste disposal in the ground Clay soils Natural gas--Transportation Radioactive waste disposal Gas transport Permeability Preferential gas pathways Self-sealing Microstructural analysis Residus radioactius--Eliminació Gas natural--Transport Argila Àrees temàtiques de la UPC::Enginyeria civil::Geologia |
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Self-sealing of boom clay after gas transportGonzález Blanco, Laura|||0000-0003-3800-3007Romero Morales, Enrique Edgar|||0000-0002-4105-8941Levasseur, SeverineClay--PermeabilityRadioactive waste disposal in the groundClay soilsNatural gas--TransportationRadioactive waste disposalGas transportPermeabilityPreferential gas pathwaysSelf-sealingMicrostructural analysisResidus radioactius--EliminacióGas natural--TransportArgilaÀrees temàtiques de la UPC::Enginyeria civil::GeologiaIn the geological disposal of high-level radioactive waste in argillaceous rocks, studying the barrier integrity after gas transport and the pathway closure thanks to self-sealing capacity is a crucial aspect for the safety assessment. This paper presents experimental research in Boom Clay (a potential host rock in Belgium) to evaluate the effectiveness of self-sealing and possible fissure reactivation during a second gas invasion event. Initial water permeability under oedometer conditions was first measured on samples at two bedding orientations, being higher the sample with bedding planes parallel to flow, highlighting marked anisotropy. Then, gas injection tests at a constant volume rate were performed. Results indicated that Boom Clay underwent expansion and degradation during gas injection due to the development of fissures that were quantified using microstructural techniques. The computed effective gas permeability was not significantly dependent on bedding orientation and was slightly larger than the initial intrinsic water permeability. The re-saturation of the samples led to a recovery of the initial water permeability for both orientations, replicating the original anisotropy. The microstructural analyses confirmed the gas pathways’ closure, indicating good self-sealing and the regaining of the hydraulic barrier function. However, a small volume of large unconnected pores was detected on undrained unloading before the microstructural study. An additional gas injection after the self-sealing resulted in a higher effective gas permeability and a larger increase in pore volume, suggesting the reopening of fissures generated during the first injection. Finally, the experimental data were compiled within a multi-scale phenomenological model to relate the microstructural information to macroscopic flow transport properties capturing the intrinsic permeability increase on gas invasion and its recovery during self-sealing.This project has received funding from the Euro- pean Union’s Horizon 2020 research and innovation programme ‘Euro- pean Joint Programme on Radioactive Waste Management (EURAD)’ (2019–2024) WP-Gas ‘Mechanistic understanding of gas transport in clay materials’ under Grant agreement No. 847593. In addition, the acknowledgements are extended to the Belgian Agency for Radioactive Waste and Enriched Fissile Materials (ONDRAF/NIRAS) for fund- ing this research program under contract No. CCHO 2021-0377/00/00 (2021–2024).Peer ReviewedSpringer20232023-01-0120242024-04-15journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/406488https://dx.doi.org/10.1007/s00603-023-03529-3reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)InglésengEuropean Commission http://doi.org/10.13039/100010661 Horizon 2020 Framework Programme 847593 European Joint Programme on Radioactive Waste Managementopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/4064882026-05-27T15:37:01Z |
| dc.title.none.fl_str_mv |
Self-sealing of boom clay after gas transport |
| title |
Self-sealing of boom clay after gas transport |
| spellingShingle |
Self-sealing of boom clay after gas transport González Blanco, Laura|||0000-0003-3800-3007 Clay--Permeability Radioactive waste disposal in the ground Clay soils Natural gas--Transportation Radioactive waste disposal Gas transport Permeability Preferential gas pathways Self-sealing Microstructural analysis Residus radioactius--Eliminació Gas natural--Transport Argila Àrees temàtiques de la UPC::Enginyeria civil::Geologia |
| title_short |
Self-sealing of boom clay after gas transport |
| title_full |
Self-sealing of boom clay after gas transport |
| title_fullStr |
Self-sealing of boom clay after gas transport |
| title_full_unstemmed |
Self-sealing of boom clay after gas transport |
| title_sort |
Self-sealing of boom clay after gas transport |
| dc.creator.none.fl_str_mv |
González Blanco, Laura|||0000-0003-3800-3007 Romero Morales, Enrique Edgar|||0000-0002-4105-8941 Levasseur, Severine |
| author |
González Blanco, Laura|||0000-0003-3800-3007 |
| author_facet |
González Blanco, Laura|||0000-0003-3800-3007 Romero Morales, Enrique Edgar|||0000-0002-4105-8941 Levasseur, Severine |
| author_role |
author |
| author2 |
Romero Morales, Enrique Edgar|||0000-0002-4105-8941 Levasseur, Severine |
| author2_role |
author author |
| dc.subject.none.fl_str_mv |
Clay--Permeability Radioactive waste disposal in the ground Clay soils Natural gas--Transportation Radioactive waste disposal Gas transport Permeability Preferential gas pathways Self-sealing Microstructural analysis Residus radioactius--Eliminació Gas natural--Transport Argila Àrees temàtiques de la UPC::Enginyeria civil::Geologia |
| topic |
Clay--Permeability Radioactive waste disposal in the ground Clay soils Natural gas--Transportation Radioactive waste disposal Gas transport Permeability Preferential gas pathways Self-sealing Microstructural analysis Residus radioactius--Eliminació Gas natural--Transport Argila Àrees temàtiques de la UPC::Enginyeria civil::Geologia |
| description |
In the geological disposal of high-level radioactive waste in argillaceous rocks, studying the barrier integrity after gas transport and the pathway closure thanks to self-sealing capacity is a crucial aspect for the safety assessment. This paper presents experimental research in Boom Clay (a potential host rock in Belgium) to evaluate the effectiveness of self-sealing and possible fissure reactivation during a second gas invasion event. Initial water permeability under oedometer conditions was first measured on samples at two bedding orientations, being higher the sample with bedding planes parallel to flow, highlighting marked anisotropy. Then, gas injection tests at a constant volume rate were performed. Results indicated that Boom Clay underwent expansion and degradation during gas injection due to the development of fissures that were quantified using microstructural techniques. The computed effective gas permeability was not significantly dependent on bedding orientation and was slightly larger than the initial intrinsic water permeability. The re-saturation of the samples led to a recovery of the initial water permeability for both orientations, replicating the original anisotropy. The microstructural analyses confirmed the gas pathways’ closure, indicating good self-sealing and the regaining of the hydraulic barrier function. However, a small volume of large unconnected pores was detected on undrained unloading before the microstructural study. An additional gas injection after the self-sealing resulted in a higher effective gas permeability and a larger increase in pore volume, suggesting the reopening of fissures generated during the first injection. Finally, the experimental data were compiled within a multi-scale phenomenological model to relate the microstructural information to macroscopic flow transport properties capturing the intrinsic permeability increase on gas invasion and its recovery during self-sealing. |
| publishDate |
2023 |
| dc.date.none.fl_str_mv |
2023 2023-01-01 2024 2024-04-15 |
| dc.type.none.fl_str_mv |
journal article http://purl.org/coar/resource_type/c_6501 VoR http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2117/406488 https://dx.doi.org/10.1007/s00603-023-03529-3 |
| url |
https://hdl.handle.net/2117/406488 https://dx.doi.org/10.1007/s00603-023-03529-3 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.relation.none.fl_str_mv |
European Commission http://doi.org/10.13039/100010661 Horizon 2020 Framework Programme 847593 European Joint Programme on Radioactive Waste Management |
| dc.rights.none.fl_str_mv |
open access http://purl.org/coar/access_right/c_abf2 |
| dc.rights.openaire.fl_str_mv |
info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
open access http://purl.org/coar/access_right/c_abf2 |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
application/pdf |
| dc.publisher.none.fl_str_mv |
Springer |
| publisher.none.fl_str_mv |
Springer |
| dc.source.none.fl_str_mv |
reponame:UPCommons. Portal del coneixement obert de la UPC instname:Universitat Politècnica de Catalunya (UPC) |
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Universitat Politècnica de Catalunya (UPC) |
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UPCommons. Portal del coneixement obert de la UPC |
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UPCommons. Portal del coneixement obert de la UPC |
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15,300724 |