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Michal Vanecek, ISATech ltd. (Czech Republic)
Radek Hanus, ISATech ltd. (Czech Republic)
Lucie Dolezalova, ISATech ltd. (Czech Republic)
Jana Michalkova, ISATech ltd. (Czech Republic)
Petra Rousova, ISATech ltd. (Czech Republic)
Karel Sosna, SG-Geotechnika a.s. (Czech Republic)
Hana Krizova, SG-Geotechnika a.s. (Czech Republic)
Jiri Zaruba, SG-Geotechnika a.s. (Czech Republic)
Tomas Navratil, Academy of Science (Czech Republic)
Petr Nakladal, KKVZ ltd. (Czech Republic)
Milan Broz, SG-Geotechnika a.s. (Czech Republic)
Jan Rohovec, Academy of Science (Czech Republic)
Michal Polak, Progeo ltd. (Czech Republic)
Martin Milicky, Progeo ltd. (Czech Republic)
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The research started in 2004 and has to be finished by the end of 2009. It's co-financed by the Ministry of Industry, the commercial companies and the research workplace. The research objective is to prove capability of the experienced team, equipped with the validated software, to work out the real hydrogeological model with the minimum enter data. Task results from the research philosophy to minimise undesirable destructive methods of hydrogeological survey on the deep repository site.
The research has been drawn in order to progress from a simple laboratory solution to the hydrogeological site model with a single fractured system. The chosen approach has to be ensured by the following stages: laboratory tests' stage - field trials - stage - prognostic modelling stage - assessment of prognostic modelling stage.
Three types of rock samples with a fissure have been selected for the stage of laboratory tests. The first type comprises of rock cylinders, that almost always include a fracture. The second type comprises of rock desks apposed and modified so that the contact creates an artificial fissure. The last type represents granite block with a distinctive fracture. Every fracture has been tested both by hydrodynamic methods and tracing tests. The hydrodynamic and hydrochemical properties of fractures have been subsequently changed by means of injected seal followed again by hydrodynamic and tracing test. All procedures have been entered in software point by point. The results of the model solution were continuously compared with the measured laboratory values.
Rock samples originate from the granite massive, where the field test is implemented. The field tests proceed in the granite quarry for decorative stone. The space of aquiferous granite block with a simple fractured system has been selected.
As it has been proved on laboratory samples the significant part of the tracing medium is beyond the fissure permeability. The presence of the tracing substance in inter-grain space of compact granite rock was obvious and checked by analytically.
Several working hypotheses explaining an inconsistencies in mass balance of the tracing substance in monitored spot, have been adopted. One of the hypotheses is also focused on the possibility of the granite rock inter-grain permeability that could be of the same importance as the fissure permeability. Some samples with a significant inter-grain permeability and the start of graphic interpretation of the measured values for the concentration of the tracing substance in monitored spot show certain anomalies. In the course of the next research the laboratory works are aimed both at the examination of the significance of inter-grain permeability and the explanation of the anomalies in early phases of the graphic demonstration of measured values for the concentration.
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