Conference Agenda

Advances on investigation of chemical effects on the hydro-mechanical behavior of compacted bentonite

Weimin YE, Puhuai LU, Qiong Wang, Yonggui Chen

Tongji University, China, People's Republic of

Five years of evolution in the mineralogy and chemistry of Milos bentonite caused by a saline (Na-Ca-Cl) hydration front against a heat source

Jaime Fernando Cuevas¹, María Victoria Villar², Andrés Idiart³, Ana Melón², Ana Isabel Ruiz¹, Almudena Ortega¹, Heino Ville⁴

¹UAM, Madrid, Spain; ²CIEMAT, Madrid, Spain; ³Amphos 21 Consulting, S.L.; ⁴POSIVA Oy, Finland

Kinetics of rehydration in smectites and bentonites

Karolina Rybka¹, Artur Kuligiewicz¹, Stephan Kaufhold², Reiner Dohrman^2,3, Arkadiusz Derkowski¹

¹Institute of Geological Sciences, Polish Academy of Sciences, Senacka 1, 31-002, Krakow, Poland; ²BGR, Bundesanstalt für Geowissenschaften und Rohstoffe, Stilleweg 2, D-30655 Hannover, Germany; ³LBEG, Landesamt für Bergbau, Energie und Geologie, Stilleweg 2, D-30655 Hannover, Germany

Cementation effect on one-dimensional swelling deformation property of bentonite ore

Daichi Ito, Hailong Wang, Hideo Komine

Waseda University, Japan

Hydrogeological model of northern Switzerland

Jens Becker¹, Jaouhar Kerrou², Ellen Milnes², Olivier Masset², Laurent Tacher³, Nicolas Roy¹, Daniel Traber¹, Pierre Perrochet²

¹Nagra, Switzerland; ²CHYN, Uni Neuchatel, Switzerland; ³Terreplus, Switzerland

Geotechnical clay core characterisation for deep geological disposal of radioactive waste in the Netherlands

Vidushi Toshniwal¹, Ties de Jong¹, Hemmo Abels¹, Wout Broere¹, Ana Maria Fernández², Michael A. Hicks¹, Dirk Munsterman³, Erika Neeft⁴, Philip J. Vardon¹, Anne-Catherine Dieudonné¹

¹Delft University of Technology, The Netherlands; ²CIEMAT, Madrid, Spain; ³TNO, Geological Survey of the Netherlands, Utrecht, The Netherlands; ⁴COVRA, Nieuwdorp, The Netherlands

Calibrated clay formation characterization using multi-scale data, clustering and stochastic approaches

Serge Marnat¹, Jens Becker²

¹Ad Terra Group, Geneva, Switzerland; ²National Cooperative for the Disposal of Radioactive Waste (Nagra), Wettingen, Switzerland

Characterizing claystone with NMR logs as repository host rock.

Joachim Strobel

BGE, Germany

Self-Sealing of the Mont Terri Opalinus Clay Main Fault following a Mesoscale Activation Experiment

Yves Guglielmi¹, Christophe Nussbaum², Frédéric Cappa³, Tanner Shadoan⁴, Jonathan Ajo-Franklin⁴, Florian Soom¹, Bill Lanyon⁵, Paul Cook¹, Chet Hopp¹, Verónica Rodríguez Tribaldos¹, Michelle Robertson¹, Todd Wood¹, Senecio Schefer², Jens Birkholzer¹

¹Energy Geosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA; ²Swiss Geological Survey, swisstopo, Wabern, Switzerland; ³Université Côte d’Azur, CNRS, Observatoire de la Côte d’Azur, IRD, Géoazur, Sophia Antipolis, France; ⁴Rice University, Dept. of Earth, Environmental, and Planetary Science, Houston, TX, USA; ⁵Fracture Systems Ltd, Tregurrian, Ayr, St. Ives, Cornwall, UK

Dismantling of the Mock-Up-Josef in-situ experiment after 10 years of operation – Comprehensive analysis of the bentonite barrier

Radek Vašíček¹, Šárka Šachlová², Jana Steinová³, Irena Hanusová⁴, Michaela Matulová⁵, Jiří Svoboda¹, Markéta Kučerová¹, Kateřina Černochová¹, Vlastislav Kašpar², Milan Zuna², Petr Večerník², Karol Kočan², Kateřina Černá⁴, Miroslava Mecová⁵

¹Czech Technical University in Prague, Faculty of Civil Engineering, Czech Republic; ²ÚJV Řež, a. s., Radioactive waste and decommissioning, Husinec Řež, Czech Republic; ³Technical University of Liberec, Institute for Nanomaterials, Advanced Technologies and Innovations, Czech Republic; ⁴National Radiation Protection Institute (SÚRO), Prague, Czech Republic; ⁵Radioactive Waste Repository Authority, Prague (SÚRAO), Czech Republic

The LOT S2 and A3 experiments at Äspö hard rock laboratory, Sweden – impact on bentonite performance after 20 years of heat-ing at 90 and 130°C

Daniel Svensson¹, Terese Bladström¹, Torbjörn Sandén², Patrik Sellin¹

¹Department of Research and Safety Assessment, Swedish Nuclear Fuel and Waste Management Co (SKB), Äspö Hard Rock Laboratory; ²Clay Technology AB, Lund, Sweden.

THM modelling for HotBENT experiment using the water retention curve assumed by Bayesian inference

Shin Sato¹, Tomoyuki Shimura¹, Florian Kober²

¹Obayashi corporation, Japan; ²Nagra, Switzerland

Elastic-viscoplastic modelling of the PRACLAY large-scale in situ heater test

Guillaume Flood-Page¹, Arnaud Dizier¹, Temenuga Georgieva¹, Mieke De Craen¹, Séverine Levasseur²

¹EURIDICE, Mol, Belgium; ²ONDRAF/NIRAS, Brussels, Belgium

Homogenisation in small-scale swelling tests with different water inflow rates

Ann Dueck¹, Daniel Malmberg¹, Patrik Sellin²

¹Clay Technology Lund AB, Sweden; ²Svensk Kärnbränslehantering AB (SKB), Sweden

Cross-scale assessment of the hydromechanically coupled behavior of two German bentonites

Antonia Nitsch¹, Ali Asaad², Katja Emmerich², Torsten Wichtmann¹, Wiebke Baille¹

¹Chair of Soil Mechanics, Foundation Engineering and Environmental Geotechnics, Department of Civil and Environmental Engineering, Ruhr-University Bochum, Bochum, Germany; ²Institute of Concrete Structures and Building Materials (IMB/MPA/CMM), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany

Thermo-hydro-mechanical modelling of bentonite using a double-porous hypoplastic bentonite model in OpenGeoSys/MFront: implementation, verification and validation

Tymofiy Gerasimov¹, Eric Simo^1,2, Thomas Nagel², Christoph Lehmann³, David Masin⁴, Tomas Krejci⁵, Jaroslav Kruis⁵, Thomas Helfer⁶, Alexandru Tatomir⁷

¹BGE TECHNOLOGY GmbH, Germany; ²TU Bergakademie Freiberg, Germany; ³Helmholtz Centre for Environmental Research – UFZ, Germany; ⁴Charles University, Czech Republic; ⁵Czech Technical University in Prague, Czech Republic; ⁶CEA, DES, IRESNE, DEC, France; ⁷BGE mbH, Federal Company for Radioactive Waste Disposal, Germany

Modelling the Full Scale Heater Experiment: Results of the international Benchmark Project DECOVALEX

Bastian Johannes Graupner¹, Kate Thatcher², Rebecca Newson², Michael Pitz³, Jan Thiedau³, Sonja Kaiser⁴, Thomas Nagel⁴, Luca Urpi⁵, Peng-Zhi Pan⁶, Wenbo Hou⁶, Larissa Friedenberg⁷, Taehyun Kim⁸, Chan-Hee Park⁹, Changsoo Lee⁸, Jonny Rutqvist¹⁰, Ruiping Guo¹¹, Teklu Hadgu¹², Edward Matteo¹²

¹Swiss Federal Nuclear Safety Inspectorate (ENSI), Brugg, Switzerland; ²Quintessa Ltd, Warrington, UK; ³Federal Institute for Geosciences and Natural Resources (BGR), Hanover, Germany; ⁴Technische Universität Bergakademie Freiberg, Germany; ⁵CSD, Aarau, Switzerland; ⁶Chinese Academy of Sciences; ⁷Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Braunschweig, Germany; ⁸Korea Atomic Energy Research Institute (KAERI), Daejeon, Korea; ⁹Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon, Korea; ¹⁰Lawrence Berkeley National Laboratory (LBNL), Berkeley, California, USA; ¹¹Nuclear Waste Management Organization NWMO, Canada; ¹²Sandia National Laboratories, USA

Hierarchical benchmarking of Richards-based thermo-hydro-mechanical coupled models for repositories of high-level radioactive waste

Jörg Buchwald^1,2, Wenqing Wang¹, Norbert Grunwald¹, Thomas Nagel², Olaf Kolditz¹

¹Helmholtz Centre for Environmental Research (UFZ), Leipzig, Germany; ²Technische Universität Bergakademie Freiberg - TABAF, Freiberg, Germany

Lessons learned from 25 years of experiments on erosion & colloid formation from compacted bentonite

Ursula Alonso, Tiziana Missana

CIEMAT, Spain

Montmorillonite colloid erosion in low ionic strength water under stagnant and flow conditions studied in artificial fractures

Magnus Hedström¹, Ulf Nilsson¹, Ralf Lamminmäki²

¹Clay Technology, Sweden; ²Posiva Oy, Finland

Numerical modelling of bentonite mass losses due to expansion, erosion, and sedimentation within thin fractures

Arnau Pont¹, Virginia Cabrera¹, Andrés Idiart¹, Mikel Diéguez², Úrsula Alonso², Patrik Sellin³, Macarena Leal³

¹Amphos 21, Spain; ²CIEMAT, Spain; ³SKB, Sweden

Quantification of bentonite mass loss in shear zone from CT scans using digital rock physics and machine learning approach: example from the LIT experiment (GTS, Switzerland)

Sarah Hupfer¹, Janis Pingel¹, Bill Lanyon², Raphael Schneeberger³, Ingo Blechschmidt³, Frieder Enzmann⁴, Saeid Sadeghnejad¹, Thorsten Schäfer¹

¹Applied Geology, Institute for Geoscience, Friedrich-Schiller-University Jena, Jena, Germany; ²Fracture Systems Ltd., St. Ives, United Kingdom; ³Nagra (National Cooperative for the Disposal of Radioactive Waste), Wettingen, Switzerland; ⁴Geoscience Institute, Johannes Gutenberg University Mainz, Mainz, Germany

The Integrated Geomodel for the Swiss nuclear waste deep geological repository: towards a digital twin for project optimization

MICHELE CLAPS, VALENTINA ZAMPETTI, IRINA GAUS

NAGRA, Switzerland

Virtual and augmented reality as a cutting-edge technology for modelling of nuclear waste repositories

Kemal Yildizdag, Claus Mindermann, Paul Lorenz

BGE - the Federal Company for Radioactive Waste Disposal, Germany

Sand-claystone mixtures: Investigating the impact of sand proportions on hydro-mechanical behavior at different scales

Anaïs LEROY¹, Olivier CUISINIER¹, Farimah MASROURI¹, Jean TALANDIER²

¹Université de Lorraine – LEMTA (UMR 7563) CNRS, Vandœuvre-lès-Nancy, France; ²Andra, Châtenay-Malabry, France

Long-term soil-structure interaction for tunnels in poorly indurated clay in the HADES Underground Research Laboratory (Mol, Belgium)

Temenuga Georgieva¹, Arnaud Dizier¹, Mieke De Craen¹, Jan Verstricht¹, Dries Nackaerts¹, Séverine Levasseur²

¹EURIDICE, Belgium; ²ONDRAF/NIRAS, Belgium

Experimental study on the shear strength and deformation characteristics of normally consolidated reconstituted Boom clay

Bhini Rani Chandan Malagar¹, Philip J. Vardon¹, André Niemeijer², Anne-Catherine Dieudonné¹

¹Delft University of Technology, Delft, The Netherlands; ²Utrecht University, Utrecht, The Netherlands