Modelling engineered barriers for spent nuclear fuel repository using a double-structure model for pellets

This paper describes an experimental programme and the corresponding modelling in order to characterise the hydromechanical (HM) behaviour of pellets. At least two levels of porosity can be distinguished in the pellets: microporosity and macroporosity. In general, the microstructure is associated wi...

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Authors: Toprak, Erdem|||0000-0001-9006-3504, Olivella Pastallé, Sebastià|||0000-0003-3976-4027, Pintado, Xavier
Format: article
Publication Date:2020
Country:España
Institution:Universitat Politècnica de Catalunya (UPC)
Repository:UPCommons. Portal del coneixement obert de la UPC
Language:English
OAI Identifier:oai:upcommons.upc.edu:2117/346065
Online Access:https://hdl.handle.net/2117/346065
https://dx.doi.org/10.1680/jenge.17.00086
Access Level:Open access
Keyword:Radioactive waste disposal in the ground
Bentonite deposits
Finite-element modelling
Radioactive waste disposal
Strength & testing of materials
Abocadors de residus radioactius
Bentonita -- Propietats
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament dels residus
Àrees temàtiques de la UPC::Energies::Energia nuclear
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spelling Modelling engineered barriers for spent nuclear fuel repository using a double-structure model for pelletsToprak, Erdem|||0000-0001-9006-3504Olivella Pastallé, Sebastià|||0000-0003-3976-4027Pintado, XavierRadioactive waste disposal in the groundBentonite depositsFinite-element modellingRadioactive waste disposalStrength & testing of materialsAbocadors de residus radioactiusBentonita -- PropietatsÀrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòlsÀrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament dels residusÀrees temàtiques de la UPC::Energies::Energia nuclearThis paper describes an experimental programme and the corresponding modelling in order to characterise the hydromechanical (HM) behaviour of pellets. At least two levels of porosity can be distinguished in the pellets: microporosity and macroporosity. In general, the microstructure is associated with the active clay minerals, while the macrostructure accounts for the larger-scale structure of the material. In pellets, this concept can be somewhat different as a pellet arrangement creates a large-scale macropore structure. The Barcelona expansive model is proposed to reproduce the material response through infiltration and oedometer tests. In addition to expansive model parameters, a set of hydraulic laws considering the double-structure phenomenon is necessary to perform HM analysis. This paper also describes the effect of macroporosity on the intrinsic permeability changes. To illustrate the general objectives of this research, a full-scale thermohydromechanical calculation has been done to show the capabilities of the approach. The Barcelona basic model (for clays) and Barcelona expansive model (for pellets) have been used in this full-scale calculation.This work was financed in part by B+Tech Oy (Finland) under a POSIVA Oy project. The authors thank Noora Kanerva, Nora Akhanoba, Oyinloye Femi Adesola and Mamunul Hassan for collaboration in the experimental work. Authors also thank to Kari Koskinen and Mika Niskanen for the management of the project.Peer Reviewed20202020-02-0120212021-05-25journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/346065https://dx.doi.org/10.1680/jenge.17.00086reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/3460652026-05-27T15:37:01Z
dc.title.none.fl_str_mv Modelling engineered barriers for spent nuclear fuel repository using a double-structure model for pellets
title Modelling engineered barriers for spent nuclear fuel repository using a double-structure model for pellets
spellingShingle Modelling engineered barriers for spent nuclear fuel repository using a double-structure model for pellets
Toprak, Erdem|||0000-0001-9006-3504
Radioactive waste disposal in the ground
Bentonite deposits
Finite-element modelling
Radioactive waste disposal
Strength & testing of materials
Abocadors de residus radioactius
Bentonita -- Propietats
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament dels residus
Àrees temàtiques de la UPC::Energies::Energia nuclear
title_short Modelling engineered barriers for spent nuclear fuel repository using a double-structure model for pellets
title_full Modelling engineered barriers for spent nuclear fuel repository using a double-structure model for pellets
title_fullStr Modelling engineered barriers for spent nuclear fuel repository using a double-structure model for pellets
title_full_unstemmed Modelling engineered barriers for spent nuclear fuel repository using a double-structure model for pellets
title_sort Modelling engineered barriers for spent nuclear fuel repository using a double-structure model for pellets
dc.creator.none.fl_str_mv Toprak, Erdem|||0000-0001-9006-3504
Olivella Pastallé, Sebastià|||0000-0003-3976-4027
Pintado, Xavier
author Toprak, Erdem|||0000-0001-9006-3504
author_facet Toprak, Erdem|||0000-0001-9006-3504
Olivella Pastallé, Sebastià|||0000-0003-3976-4027
Pintado, Xavier
author_role author
author2 Olivella Pastallé, Sebastià|||0000-0003-3976-4027
Pintado, Xavier
author2_role author
author
dc.subject.none.fl_str_mv Radioactive waste disposal in the ground
Bentonite deposits
Finite-element modelling
Radioactive waste disposal
Strength & testing of materials
Abocadors de residus radioactius
Bentonita -- Propietats
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament dels residus
Àrees temàtiques de la UPC::Energies::Energia nuclear
topic Radioactive waste disposal in the ground
Bentonite deposits
Finite-element modelling
Radioactive waste disposal
Strength & testing of materials
Abocadors de residus radioactius
Bentonita -- Propietats
Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament dels residus
Àrees temàtiques de la UPC::Energies::Energia nuclear
description This paper describes an experimental programme and the corresponding modelling in order to characterise the hydromechanical (HM) behaviour of pellets. At least two levels of porosity can be distinguished in the pellets: microporosity and macroporosity. In general, the microstructure is associated with the active clay minerals, while the macrostructure accounts for the larger-scale structure of the material. In pellets, this concept can be somewhat different as a pellet arrangement creates a large-scale macropore structure. The Barcelona expansive model is proposed to reproduce the material response through infiltration and oedometer tests. In addition to expansive model parameters, a set of hydraulic laws considering the double-structure phenomenon is necessary to perform HM analysis. This paper also describes the effect of macroporosity on the intrinsic permeability changes. To illustrate the general objectives of this research, a full-scale thermohydromechanical calculation has been done to show the capabilities of the approach. The Barcelona basic model (for clays) and Barcelona expansive model (for pellets) have been used in this full-scale calculation.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-02-01
2021
2021-05-25
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/346065
https://dx.doi.org/10.1680/jenge.17.00086
url https://hdl.handle.net/2117/346065
https://dx.doi.org/10.1680/jenge.17.00086
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
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.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300724

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