scholarly journals Corrosion of carbon steel in clay environments relevant to radioactive waste geological disposals, Mont Terri rock laboratory (Switzerland)

2017 ◽  
Vol 110 (1) ◽  
pp. 329-342 ◽  
Author(s):  
Sophia Necib ◽  
Nikitas Diomidis ◽  
Peter Keech ◽  
Masashi Nakayama
Keyword(s):  
Carbon Steel ◽  
Radioactive Waste ◽  
Rock Laboratory ◽  
Mont Terri ◽  
Mont Terri Rock Laboratory

scholarly journals From process to system understanding with multi-disciplinary investigation methods: set-up and first results of the CD-A experiment (Mont Terri rock laboratory)

2021 ◽  
Vol 1 ◽  
pp. 79-81
Author(s):  
Gesa Ziefle ◽  
Tuanny Cajuhi ◽  
Sebastian Condamin ◽  
Stephan Costabel ◽  
Oliver Czaikowski ◽  
...  
Keyword(s):  
Radioactive Waste ◽  
Site Selection ◽  
Fault Zones ◽  
Rock Laboratory ◽  
Investigation Methods ◽  
Physical Effects ◽  
Mont Terri ◽  
Mont Terri Rock Laboratory ◽  
The Impact

Abstract. A potential repository site for high-level radioactive waste should ensure the highest possible safety level over a period of one million years. In addition to design issues, demonstrating the integrity of the barrier is essential as it ensures the long-term containment of radioactive waste. Therefore, a multi-disciplinary approach is necessary for the characterization of the surrounding rock and for the understanding of the occurring physical processes. For site selection, however, the understanding of the respective system is essential as well: Do fault zones exist in the relevant area? Are these active and relevant for interpreting system behavior? What is the role of the existing heterogeneities of the claystone and how do these site-dependent conditions influence the physical effects? To answer these questions, the site-selection procedure requires underground exploration, which includes geophysical and geological investigations on milli- to decameter scales. Their results serve as the basis for numerical modelling. This combined, multi-disciplinary interpretation requires extensive knowledge of the various methods, their capabilities, limitations, and areas of application. In the cyclic deformation (CD-A) experiment in the Mont Terri rock laboratory, the hydraulic–mechanical effects due to excavation and the climatic conditions within the rock laboratory are investigated in two niches in the Opalinus Clay. The twin niches differ mainly with regard to the relative humidity inside them, but are also characterized by different boundary conditions such as existing fault zones, the technical construction of the neighboring gallery, etc. In order to gain insights into the relevance of the individual influences, comparative studies are being carried out on both niches. The presented results provide a first insight into the initial experimental years of the CD-A long-term experiment and illustrate the benefits of multi-disciplinary investigations in terms of system understanding and the scale dependency of physical effects. Amongst other effects, the assessment of the impact of heterogeneities on the deformation behavior and the evolution of pore water pressure is very complex and benefits from geological interpretation and measurements of for example deformation, water content, and pore pressure. The numerical modeling allows statements about the interaction of different processes and thus enables an interpretation of the overall system, taking into account the knowledge gained by the multi-disciplinary investigation.

scholarly journals Exploring diffusion and sorption processes at the Mont Terri rock laboratory (Switzerland): lessons learned from 20 years of field research

2017 ◽  
Vol 110 (1) ◽  
pp. 391-403 ◽  
Author(s):  
Olivier X. Leupin ◽  
Luc R. Van Loon ◽  
Thomas Gimmi ◽  
Paul Wersin ◽  
Josep M. Soler
Keyword(s):  
Field Research ◽  
Lessons Learned ◽  
Rock Laboratory ◽  
Mont Terri ◽  
Mont Terri Rock Laboratory
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