| Autor: |
Sayad Noghretab, Babak, Puig Damians, Ivan, Olivella Pastallé, Sebastià, Gens Solé, Antonio |
| Přispěvatelé: |
Universitat Politècnica de Catalunya. Doctorat en Enginyeria del Terreny, Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental, Universitat Politècnica de Catalunya. GGMM - Grup de Geotècnia i Mecànica de Materials |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
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| Popis: |
This paper presents the results of the initial molding of the large-scale gas injection test 1 (Lasgit) conducted at the Äspö Hard Rock Laboratory in Sweden. Lasgit is a field test that follows the Swedish KBS-3V disposal concept, in which copper/steel canisters containing spent nuclear fuel are deposited in disposal boreholes drilled into the repository tunnels' floor. Bentonite blocks are used to fill the space around each canister, which will eventually swell and seal any gaps. Once hydrated, the bentonite acts as a diffusional barrier to prevent the migration of radionuclides. The gas flow process is influenced significantly by material heterogeneity and local deformability, and material properties are not constant throughout. The initial medium structure is non-uniform, and deformations can result in changes in hydraulic properties and structure. Therefore, material heterogeneity is critical in the THM modeling process. To simulate the tests, a coupled hydro-gas-mechanical 3D numerical model was developed. The model assumes initial permeability to be heterogeneous and includes embedded fractures in the formulation. The model accurately reproduces the observed gas pressure evolution during the test. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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