Conference Abstract
| 
10 Nov 2021
Conference Abstract |
| 10 Nov 2021
| 10 Nov 2021
Large-scale testing of a sandwich shaft-sealing system at the Mont Terri rock laboratory
Klaus Wieczorek
CORRESPONDING AUTHOR
Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Braunschweig, Germany
Katja Emmerich
Karlsruher Institut für Technologie (KIT), Kompetenzzentrum für Materialfeuchte (IMB-CMM), Karlsruhe, Germany
Rainer Schuhmann
Karlsruher Institut für Technologie (KIT), Kompetenzzentrum für Materialfeuchte (IMB-CMM), Karlsruhe, Germany
Jürgen Hesser
Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Hannover, Germany
Markus Furche
Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Hannover, Germany
David Jaeggi
Bundesamt für Landestopografie (swisstopo), Bern, Switzerland
Senecio Schefer
Bundesamt für Landestopografie (swisstopo), Bern, Switzerland
Jan Aurich
TU Bergakademie Freiberg, Freiberg, Germany
Juan Carlos Mayor
Empresa nacional de residuos radiactivos (Enresa), Madrid, Spain
Simon Norris
Radioactive Waste Management (RWM), Didcot, United Kingdom
Ken Birch
Nuclear Waste Management Organization (NWMO), Toronto, Canada
Manuel Sentis
Eidgenössisches Nuklearsicherheitsinspektorat (ENSI), Brugg, Switzerland
José Luis García-Siñeriz
Amberg Infraestructuras, Alcobendas, Spain
Franz Königer
Ingenieur-Gesellschaft für Sensorik in der Umwelttechnik mbH (ISU), Karlsruhe, Germany
Uwe Glaubach
Ingenieurpartnerschaft für Bergbau, Wasser und Deponietechnik (IBeWa), Freiberg, Germany
Christopher Rölke
Institut für Gebirgsmechanik (IfG), Leipzig, Germany
Ralf Diedel
Stephan Schmidt Gruppe, Dornburg, Germany
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The SW-A experiment is a large-scale in situ test at the Mont Terri rock laboratory that implements a vertical hydraulic shaft-sealing system in argillaceous host rock. The response of the system and the surrounding rock to hydration is examined. The experiment objectives are to demonstrate the feasibility of installation, to investigate the saturation process, to qualify measurement and monitoring techniques, and to assess the sealing effectiveness. Recent data and experience are presented.
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Cited articles
Emmerich, K., Schuhmann, R., Königer, F., Bohac, P.,
Delavernhe, L., Wieczorek, K., Czaikowski, O., Hesser, J., Shao, H., Jaeggi,
D., Bossart, P., Hansmann, J., Gruner, M., Hofmann, M., Aurich, J., Rölke,
C., Popp, T., Diedel, R., Schellhorn, M., Häußer, S., Glaubach, U.,
Wilsnack, T., Kemper, G., García-Siñeriz, J. L., Villar, M.,
Gutiérrez-Álvarez, C., and Iglesias, R. J.: Joint project: Vertical
hydraulic sealing system based on the sandwich principle – preproject
(Sandwich-VP), Final report, Karlsruher Institut für Technologie (KIT) &
Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, 2019.
Kudla, W. and Herold, P.: Zusammenfassender Abschlussbericht für das Verbundvorhaben Schachtverschlüsse für Endlager für hochradioaktive Abfälle (ELSA – Phase 2): Konzeptentwicklung für Schachtverschlüsse und Test von Funktionselementen von Schachtverschlüssen, Technische Universität Bergakademie Freiberg und BGE TECHNOLOGY GmbH, 2021.
Schuhmann, R., Emmerich, K., Kemper, G., and Königer, F.: Verschlusssystem mit Äquipotenzialsegmenten für die untertägige Entsorgung (UTD und ELA) gefährlicher Abfälle zur Sicherherstellung der homogenen Befeuchtung der Dichtelemente und zur Verbesserung der Langzeitstabilität: Schlussbericht, 117 S., https://doi.org/10.2314/GBV:637752392, 2019.
Short summary
A Sandwich shaft sealing system consists of alternating sealing segments (DS) of bentonite and equipotential segments (ES) with a high hydraulic conductivity. Water accessing the system results in swelling of the DS. Within the ES the water is evenly distributed over the cross section of the seal. Thus, swelling is more homogeneous and seal bypass is reduced. At the Mont Terri rock laboratory, this sealing system is tested in connection with the host rock in a large-scale in-situ experiment.
A Sandwich shaft sealing system consists of alternating sealing segments (DS) of bentonite and...
