Conceptual uncertainties in modelling the interaction between engineered and natural barriers of nuclear waste repositories in crystalline rocks
| Autor: | D. Holton, Stefan Finsterle, J.-S. Kim, A. Sawada, D. Malmberg, K.-P. Kröhn, N. Bockgård, I. Hančilová, U. Svensson, B. Lanyon, H. Viswanathan, Antonio Gens, Andrew Frampton, Åsa Fransson, Anders Sjöland, B. Gylling, M. Åkesson, M. Bergström, Susan Baxter, William Dershowitz, Jerker Jarsjö, Benoît Dessirier, Veli-Matti Pulkkanen, Patrik Vidstrand |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental, Universitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Engineering
Civil 010504 meteorology & atmospheric sciences Interface (Java) ta1172 Radioactive waste disposal in the ground ta1171 Engineering Multidisciplinary Ocean Engineering 010502 geochemistry & geophysics 01 natural sciences Civil engineering Lead (geology) Relevance (information retrieval) Engineering Ocean Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament dels residus [Àrees temàtiques de la UPC] Engineering Aerospace Engineering Biomedical ta218 0105 earth and related environmental sciences Water Science and Technology Energies::Energia nuclear [Àrees temàtiques de la UPC] ta214 Conceptual model (computer science) Radioactive waste Geology Computer Science Software Engineering Engineering Marine Residus radioactius -- Emplaçament Characterization (materials science) Engineering Manufacturing Engineering Mechanical Natural barrier Engineering Industrial Enginyeria civil::Geotècnia::Mecànica de sòls [Àrees temàtiques de la UPC] Test data |
| Zdroj: | Scipedia Open Access Scipedia SL Finsterle, S, Lanyon, B, Åkesson, M, Baxter, S, Bergström, M, Bockgård, N, Dershowitz, W, Dessirier, B, Frampton, A, Fransson, Å, Gens, A, Gylling, B, Hančilová, I, Holton, D, Jarsjö, J, Kim, J-S, Kröhn, K-P, Malmberg, D, Pulkkanen, V-M, Sawada, A, Sjöland, A, Svensson, U, Vidstrand, P & Viswanathan, H 2018, ' Conceptual uncertainties in modelling the interaction between engineered and natural barriers of nuclear waste repositories in crystalline rocks ', Geological Society Special Publication, vol. 482, no. 1, pp. 261-283 . https://doi.org/10.1144/SP482.12 UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| ISSN: | 0305-8719 |
| DOI: | 10.1144/SP482.12 |
| Popis: | Nuclear waste disposal in geological formations relies on a multi-barrier concept that includes engineered components – which, in many cases, include a bentonite buffer surrounding waste packages – and the host rock. Contrasts in materials, together with gradients across the interface between the engineered and natural barriers, lead to complex interactions between these two subsystems. Numerical modelling, combined with monitoring and testing data, can be used to improve our overall understanding of rock–bentonite interactions and to predict the performance of this coupled system. Although established methods exist to examine the prediction uncertainties due to uncertainties in the input parameters, the impact of conceptual model decisions on the quantitative and qualitative modelling results is more difficult to assess. A Swedish Nuclear Fuel and Waste Management Company Task Force project facilitated such an assessment. In this project, 11 teams used different conceptualizations and modelling tools to analyse the Bentonite Rock Interaction Experiment (BRIE) conducted at the Äspö Hard Rock Laboratory in Sweden. The exercise showed that prior system understanding along with the features implemented in the available simulators affect the processes included in the conceptual model. For some of these features, sufficient characterization data are available to obtain defensible results and interpretations, whereas others are less supported. The exercise also helped to identify the conceptual uncertainties that led to different assessments of the relative importance of the engineered and natural barrier subsystems. The range of predicted bentonite wetting times encompassed by the ensemble results were considerably larger than the ranges derived from individual models. This is a consequence of conceptual uncertainties, demonstrating the relevance of using a multi-model approach involving alternative conceptualizations. |
| Databáze: | OpenAIRE |
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