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Title:
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Modeling of gas transport through bentonite taking into account subscale structures with process-dependent behaviour
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Author:
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Senger, Rainer; Namhata, Argha; Papafotiou, Alexandros; Marschall, Paul; Romero Morales, Enrique Edgar
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental; Universitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques |
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Abstract:
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In many nuclear waste disposal concepts bentonite is used as a buffer material forming the near-field around the HLW canisters and the sealing material for the backfilled repository structures. The safety functions of the bentonite-based components of the engineered barrier system (EBS), namely confinement and attenuation of the radioactive waste, can be expressed by so-called safety function indicators such as low hydraulic conductivity, chemical retention of radionuclides, sufficient density and swelling capacity of the bentonite (e.g.; Leupin et al. 2014). The migration of a free gas phase through the saturated bentonite may impair the safety functions of the EBS and violate the corresponding performance measures that have to be fulfilled by the associated safety assessment (SA) of the repository. |
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Subject(s):
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-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
-Radioactive waste disposal in the ground
-Bentonite deposits
-Disposal of Radioactive Waste
-bentonite
-engineered barrier system
-EBS-Task Force
-Residus radioactius -- Emplaçament
-Bentonita -- Propietats mecàniques |
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Rights:
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Document type:
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Article - Published version
Conference Object |
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