Saturation development in the bentonite barrier of the Mock-Up-CZ geotechnical experiment

Pacovský, Jaroslav; Svoboda, Jiří; Zapletal, L.

doi:10.1016/j.pce.2006.03.005

Cited by 51 publications

(11 citation statements)

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“…These individual components were connected using 16 bolts. The compacted blocks (ρ d = 1700 kg/m 3 ) and filling of residual free space contained 85 % of bentonite (from the Rokle deposit), 10 % of quartz sand and 5 % of graphite (from the conditioning plant at Netolice) (Pacovský et al 1998(Pacovský et al , 2007. The model was saturated with synthetic granitic water (Svoboda & Vašíček 2009).…”

Section: Methodsmentioning

confidence: 99%

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Mineral stability of Fe-rich bentonite in the Mock-Up-CZ experiment

Stricek¹,

Šucha²,

Uhlík³

et al. 2009

Geologica Carpathica

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Abstract:Bentonite is a basic component of most concepts of multibarrier systems in underground radioactive waste repositories. It is important to determine the bentonite stability under the conditions close to the future real situation. The paper brings the detailed mineral and structural analyses of smectites from the bentonitic material exposed to the long term Mock-Up-CZ experiment. The compacted barrier blocks and residual filling contained 85 % of bentonite from the Rokle deposit, 10 % of quartz sand and 5 % of graphite. They were exposed to temperatures of up to 90 °C for almost 4 years. Quantitative mineral analyses, crystal size distributions, FTIR spectra, as well as cation exchange capacity and layer charge density show high mineral stability of the Rokle bentonite under the conditions of Mock-Up-CZ experiment. Small changes in the crystal sizes and slight change in the layer charge as a consequence of the experimental alteration could be linked to the hydration and the variation of the geochemical environment of the experiment.

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Section: Methodsmentioning

confidence: 99%

“…A similar experiment -Mock-Up-CZ was built by the team of the Czech University of Technology in Prague (Pacovský 2004;Pacovský et al 2007). The main aim was to test the stability of the local bentonite buffer material for the even- …”

Section: Introductionmentioning

confidence: 99%

Mineral stability of Fe-rich bentonite in the Mock-Up-CZ experiment

Stricek¹,

Šucha²,

Uhlík³

et al. 2009

Geologica Carpathica

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show abstract

“…1) bench-scale buffer mass test of Czech smectitic clay in a KBS-3V arrangement (Pacovský et al, 2007;Hökmark and Fälth, 2003;Benneth and Hicks, 2005). This model was constructed at the Centre of Experimental Geotechnics of the Faculty of Civil Engineering, CTU in Prague in 2000e2002 (Pacovský, 2003(Pacovský, , 2006Svoboda and Vaší cek, 2006).…”

Section: Performance Of the Mock-up-cz Experimentsmentioning

confidence: 99%

“…Elsewhere in Europe, 2 horizontal models have been constructed to date, the first at Ciemat (Centro de Investigaciones Energéticas) in Madrid e Spain, and the second at SCK-CEN (Studiecentrum voor Kernenergie) in Mol e Belgium. The Prague Mock-Up-Cz has thus bridged a gap in European experimental research into the problems of high-level nuclear waste disposal in a deep repository (Pacovský et al, 2007).…”

Section: Performance Of the Mock-up-cz Experimentsmentioning

confidence: 99%

The influence of temperature and hydration on the sorption properties of bentonite

Vinšová

Jedináková-Křížová

Kolarikova

et al. 2008

Journal of Environmental Radioactivity

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“…One of the recent environmental applications of bentonites is connected with high-level nuclear waste disposal in underground repositories using a multibarrier system of two basic components, a host rock and an engineered barrier made of metallic containers filled with radioactive waste surrounded by bentonite blocks, as is documented by the results of large scale experiments (e.g. Delay et al 2007;Pacovský et al 2007;Stríček et al 2009). Sorption of radioactive metal cations on the Land JP bentonites has been described recently in detail by Galamboš et al (2009aGalamboš et al ( ,b, 2010.…”

Section: Introductionmentioning

confidence: 99%