Conference Agenda

Study on the construction of disposal scenarios and a tentative migration modelling of cesium for the final disposal of radioactive-ly contaminated waste outside of Fukushima Prefecture

Eriko Minari, Kazuo Yamada, Kazuto Endo

National Institute of Environmental Studies, Japan

Investigating the Effects of Small Organic Molecules on the Adsorption of Uranyl on Clay Minerals with Molecular Dynamics

Jakub Ličko, Andrey G. Kalinichev

SUBATECH (UMR 6457 – IMT Atlantique, Nantes Université, CNRS-IN2P3), France

Numerical investigation of pore characteristics in spherical and platelet particle beds

Otono Miura¹, Ryunosuke Oishi¹, Tsubasa Yagi², Shusaku Harada¹

¹Hokkaido University, Japan; ²Radioactive Waste Management Funding and Research Center, Japan

Migration of caesium decreases with increasing compaction of MX-80 bentonite

Theresa Hennig¹, Sina Grossmann², Jens Mibus³, Luc R. Van Loon⁴, Martin A. Glaus⁴, Vinzenz Brendler⁵

¹GFZ German Research Centre for Geosciences, Fluid Systems Modelling, Potsdam, Germany; ²VKTA Radiation Protection, Analytics and Disposal Rossendorf Inc., Environmental and Radionuclide Analyses, Dresden, Germany; ³Federal Office for the Safety of Nuclear Waste Management (BASE), Department A Supervision, Berlin, Germany; ⁴Paul Scherrer Institut, Laboratory for Waste Management, Villigen PSI, Switzerland; ⁵Helmholtz-Zentrum Dresden Rossendorf e.V., Institute of Resource Ecology, Dresden, Germany

Understanding the Effect of Indigenous Microorganisms in Bentonite on the Biocorrosion of Metal Canisters, for the Final Disposal of Nuclear waste (Under Relevant DGR Conditions)

Adam David Mumford¹, Marcos Martinez-Moreno², Cristina Povedano-Priego², Mar Morales-Hidalgo², Miguel Ruiz-Fresneda², Yon Ju-Nam¹, Mohamed L. Merroun², Jesus J. Ojeda¹

¹Swansea University, Department of Chemical Engineering, United Kingdom; ²University of Granada, Department of Microbiology, Spain

Temperature Influence on Swelling Pressure of Ca-Bentonite up to 150 °C

Deuk-Hwan Lee, Gi-Jun Lee, Seeun Chang, Minhyeong Lee, Seok Yoon, Chnagsoo Lee, Dong-Keun Cho

Korea Advanced Energy Research Institute, Korea, Republic of (South Korea)

Implications of groundwater composition on the performance of ben-tonite components in nuclear waste disposal facilities

Han Ming Lai¹, Lidija Zdravkovic¹, David M. Potts¹, Matthew Kirby²

¹Imperial College London, United Kingdom; ²Nuclear Waste Services, UK

Role of poromechanical couplings in gas fracturing around an excavation

Mohammad-Youssef FALLAH-SOLTANABAD¹, Amade POUYA¹, Laurent BROCHARD¹, Minh-ngoc VU², Christophe DE LESQUEN²

¹Navier Laboratory, Ecole des Ponts ParisTech, Gustave Eiffel University, CNRS, 77455 Marne la Vallée, France; ²Andra R&D, 92290 Châtenay-Malabry, France

Gas Transport in the Barrier – Lessons learnt from BenVaSim-II, EURAD-GAS and DECOVALEX2023

Michael Pitz^1,2, Gesa Ziefle¹, Jobst Maßmann¹, Eike Radeisen^1,4, Norbert Grunwald^3,2, Olaf Kolditz^3,4, Thomas Nagel^2,3

¹Federal Institute for Geosciences and Natural Resources; ²Technische Universität Bergakademie Freiberg; ³Helmholtz Center for Environmental Research; ⁴Technical University Dresden

An Assessment Strategy for the Evaluation of Radionuclide Migration from Potential Repositories in Claystone

Christoph Behrens, Merle Bjorge, Julia Dose, Marlene Gelleszun, Niklas Meindl, Florian Panitz, Shorash Miro, Alexander Renz, Robert Seydewitz, Wolfram Rühaak, Stephanie Zeunert, Phillip Kreye

Bundesgesellschaft für Endlagerung mbH, Eschenstraße 55, 31224 Peine, Germany

CIGEO project - Analysis of the effect of segmental lining joints on the tunnel mechanical behaviour during the operational phase and over the long term

Marco Camusso¹, Minh-Ngoc Vu²

¹ITASCA Consultants S.A.S., Lyon, France; ²ANDRA, Châtenay-Malabry, France

Adapting disposal concepts to reflect emerging UK geologiccal environments

Matthew Edward Kirby, Simon Norris

Nuclear Waste Services, United Kingdom

New data on the compositional-structural characteristics of the Opalinuston Formation from Southern Germany: Facies-based investigations and mineralogical analyses

Tilo Kneuker¹, Thomas Mann¹, Reiner Dohrmann^1,2, Kristian Ufer¹, Jochen Erbacher¹, André Bornemann¹, Bernhard Schuck¹, Lukas Pollok¹

¹Federal Institute for Geosciences and Natural Resources, Hannover, Germany; ²State Authority for Mining, Energy and Geology (LBEG), Hannover, Germany

Effects of ionic strength on cation exchange selectivities of Ca(II), Mg(II), K(I) for Na(I) in compacted and dispersed montmorillonite

Ryo Yasuda¹, Shingo Tanaka¹, Daisuke Hayashi¹, Hitoshi Owada¹, Tomoko Ishii³, Yukinobu Kimura²

¹Radioactive Waste Management Funding and Research Center, Japan; ²Obayashi Corporation Co., Ltd.; ³Taiheiyo Consultant Co., Ltd

Geochemical investigation of veins and evidence for paleo fluid flow in Opalinus Clay

Lukas Aschwanden¹, Nathan Looser², Martin Mazurek¹, Thomas Gimmi^1,3, Daniel Traber⁴

¹University of Bern, Switzerland; ²ETH Zürich, Switzerland; ³Paul Scherrer Institut, Villigen, Switzerland; ⁴NAGRA, Wettingen, Switzerland

Comparison of the clay mineralogy of fault and host rocks in the Opalinus Clay, Switzerland

Jonas Strasser, Susanne Gier, Kurt Decker

University of Vienna, Austria

CO2 Long-term Periodic Injection Experiment (Mont Terri URL): Introduction to the in-situ experiment and results of the first phase

Martin Ziegler¹, David Jaeggi¹, Rolf Kipfer², Antonio Pio Rinaldi³, Anne Obermann³, Jonas Junker³, Hua Shao⁴, Markus Furche⁴

¹Federal Office of Topography, Mont Terri Underground Rock Laboratory, St. Ursanne, Switzerland; ²Department Water Resources and Drinking Water, EAWAG, Dübendorf, Switzerland; ³Swiss Seismological Service, ETH Zurich, Zurich, Switzerland; ⁴Federal Institute for Geosciences and Natural Resources, Hannover, Germany

Extraction, Quantification and Isotopic Characterisation of Gases Dissolved in Porewater of Argillaceous Rocks - Method Comparison and Evaluation

Florian Eichinger¹, Laura Kennell², Niko Kampman³

¹Hydroisotop GmbH, Germany; ²NWMO, Canada; ³Nuclear Waste Services, UK

GeM-DB – A basis for planning surface exploration programs

Raphael Dlugosch, Thies Beilecke, Tilo Kneuker, Lukas Pollok, Lisa Richter, Nicole Schubarth-Engelschall, Ralf Semroch

Federal Institute for Geosciences and Natural Resources, Germany

Influence of Rescue Chambers on the Design of Geological Repositories in Clay

Felix Lehnen, Berit Rauscher

Brenk Systemplanung GmbH, Germany

MiniSandwich experiment – performance test in laboratory of a bentonite-based shaft sealing system

Christopher Rölke¹, Katja Emmerich², Eleanor Bakker², Hua Shao³

¹Institut für Gebirgsmechanik GmbH Leipzig (IfG), Germany; ²Karlsruher Institut für Technologie (KIT), Germany; ³Bundesanstalt für Geologie und Rohstoffe (BGR), Germany

Long term monitoring of physical and chemical parameters of a ce-mento-bentonitic filling material (CBFM) and of corrosion potential of a horizontal pipe made of carbon steel, submerged by the CBFM into a sealed cell of underground gallery

Ioannis IGNATIADIS¹, Yendoube Charles SANO MOYEME², Johan BERTRAND³, Stéphanie BETELU⁴

¹BRGM, France; ²BRGM, France; ³ANDRA, France; ⁴BRGM, France

Multi-scale modelling of the Sandwich experiment in Mont Terri

Larissa Friedenberg, Matthias Hinze, Klaus Wieczorek

Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Germany

Study on the construction of disposal scenarios and a tentative migration modelling of cesium for the final disposal of radioactive-ly contaminated waste outside of Fukushima Prefecture

Eriko Minari, Kazuo Yamada, Kazuto Endo

National Institute of Environmental Studies, Japan

All‑solid‑state reference electrode based on lithium lanthanum tita-nium oxide (LLTO) for the long term monitoring of nuclear waste dis-posals

Djouhar AOUBIDA^1,3, quoc-nghi PHAM³, Stéphanie BETELU¹, Johan BERTRAND², Nita DRAGOE³, Ioannis IGNATIADIS¹

¹BRGM (French Geological Survey), Orleans, France; ²ANDRA (French national radioactive waste management agency), Châtenay-Malabry, France; ³ICMMO (Institute of Molecular Chemistry and Materials), Orsay, France

Direct Mineral Content Prediction from Drill Core Images via Transfer Learning

Romana Boiger¹, Sergey V. Churakov^1,2, Ignacio Ballester Llagaria^1,3, Georg Kosakowski¹, Raphael Wüst^4,5, Nikolaos I. Prasianakis¹

¹Paul Scherrer Institute, Switzerland; ²University of Bern, Switzerland; ³ETH Zürich, Switzerland; ⁴Nagra, Switzerland; ⁵James Cook University, Australia

OpenWorkFlow - Open-source synthesis-platform for safety in-vestigations in the site selection process

Olaf Kolditz^1,4, Christoph Lehmann¹, Thomas Nagel², Christoph Behrens³, Alexander Renz³, Phillip Kreye³, Wolfram Rühaak³

¹Helmholtz-Zentrum für Umweltforschung GmbH UFZ, Germany; ²TU Bergakademie Freiberg; ³BGE Bundesgesellschaft für Endlagerung mbH; ⁴Dresden University of Technology

DEVELOPMENT AND USE OF THE THERMOCHIMIE DATABASE

Stéphane Brassinnes¹, Benoît Madé², Will Bower³

¹Belgian Agency for Radioactive Waste and Enriched Fissile Materials (ONDRAF/NIRAS); ²Agence nationale pour la gestion des déchets radioactifs (Andra); ³Nuclear Waste Services (NWS)

Investigating the Effects of Small Organic Molecules on the Adsorption of Uranyl on Clay Minerals with Molecular Dynamics

Jakub Ličko, Andrey G. Kalinichev

SUBATECH (UMR 6457 – IMT Atlantique, Nantes Université, CNRS-IN2P3), France

Numerical investigation of pore characteristics in spherical and platelet particle beds

Otono Miura¹, Ryunosuke Oishi¹, Tsubasa Yagi², Shusaku Harada¹

¹Hokkaido University, Japan; ²Radioactive Waste Management Funding and Research Center, Japan

Influence of salinity gradients on the diffusion of water and ionic species in dual porosity clay samples

Emmanuel Tertre¹, Thomas Dabat¹, Jingyi Wang², Sebastien Savoye², Fabien Hubert¹, Baptiste Dazas¹, Christophe Tournassat^3,4, Eric Ferrage¹

¹Université de Poitiers/CNRS, UMR 7285 IC2MP, Equipe HydrASA, 5 rue Albert Turpain, Bât. B8, TSA - 51106, 86073 Poitiers cedex 9, France; ²Université Paris-Saclay, CEA, Service d'Etude du Comportement des Radionucléides, 91191 Gif-sur Yvette, France; ³ISTO, UMR 7327, Univ. Orleans, CNRS, BRGM, OSUC, F-45071 Orléans, France; ⁴Earth and Environmental Sciences Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, USA

Diffusion experiment (36Cl, 3H) across concrete/claystone interface

Urs Mäder¹, Lukas Martin², Carmen Zwahlen³, Sandra Baur⁴, Christoph Vockenhuber⁵, Andreas Jenni³, Martin Heule⁴, Marcus Christl⁵, Mirjam Kiczka³, Josep Soler⁶

¹Rock-Water Consulting, Boll, Switzerland; ²Nagra, Wettingen, Switzerland; ³University of Bern, Switzerland; ⁴Paul Scherrer Institut, Switzerland; ⁵ETH Zuerich, Switzerland; ⁶CSIC Barcelona, Spain

Long Term Safety studies at EDF with code_saturne

Jérôme BONELLE, Marc KHAM, Raphael LAMOUROUX

EDF, France

Interaction of groundwater in crystalline rock and a compacted bentonite buffer

Michael Kröhn, Klaus-Peter Kröhn

GRS gGmbH, Germany

Migration of caesium decreases with increasing compaction of MX-80 bentonite

Theresa Hennig¹, Sina Grossmann², Jens Mibus³, Luc R. Van Loon⁴, Martin A. Glaus⁴, Vinzenz Brendler⁵

¹GFZ German Research Centre for Geosciences, Fluid Systems Modelling, Potsdam, Germany; ²VKTA Radiation Protection, Analytics and Disposal Rossendorf Inc., Environmental and Radionuclide Analyses, Dresden, Germany; ³Federal Office for the Safety of Nuclear Waste Management (BASE), Department A Supervision, Berlin, Germany; ⁴Paul Scherrer Institut, Laboratory for Waste Management, Villigen PSI, Switzerland; ⁵Helmholtz-Zentrum Dresden Rossendorf e.V., Institute of Resource Ecology, Dresden, Germany

Impact of temperature on the transfer of mobile tracers in the Toarcian clayrock at the Tournemire URL

Maïwenn Humbezi Desfeux¹, Jean-Michel Matray¹, Manuel Marcoux²

¹Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SPDR/LETIS, Fontenay-aux-Roses, F-92260, France; ²Institut de Mécanique des Fluides de Toulouse, UMR 5502 CNRS/INP/UPS 31400 Toulouse, France

Diffusion of Np through Illite du Puy

Claudia Joseph^1,2, Bianca Schacherl¹, Tonya Vitova¹, Polina Lavrova¹, Theresa Hennig³, Michael Kühn^3,4

¹Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), Germany; ²Bundesgesellschaft für Endlagerung, Germany; ³GFZ German Research Centre for Geosciences, Fluid Systems Modelling, Germany; ⁴University of Potsdam, Institute of Geosciences, Germany

Optimizing Wellbore Sealing with Japanese Na-Bentonite: In-sights from Two Vertical Wells at Grimsel Test Site, Switzerland

Takanori Kunimaru¹, Raphael Schneeberger², Armin Pechstein², Stratis Vomvoris²

¹NUMO, Japan; ²Nagra, Switzerland

Experimental and modelling study of the hydro-chemo-mechanical behaviour of sand bentonite mixtures in hyperalkaline conditions

Christophe IMBERT¹, Andrés IDIART², Sebastien SAVOYE¹, Wissem DRIDI¹, Marcelo LAVIÑA², Miquel DE LA IGLESIA², Nicolas MICHAU³, Benoit COCHEPIN³, Jean TALANDIER³

¹Paris-Saclay University, CEA, DRMP, 91191, Gif-sur-Yvette, France; ²Amphos 21 Consulting S.L., Barcelona, Spain; ³Andra, R&D Division, F-92298 Châtenay Malabry, France

Reactive Transport Modelling of Material Interface Evolution in the HLW Near-field

Georg Kosakowski¹, Lukas Martin²

¹Paul Scherrer Institut, Switzerland; ²Nagra, Switzerland

Understanding the Effect of Indigenous Microorganisms in Bentonite on the Biocorrosion of Metal Canisters, for the Final Disposal of Nuclear waste (Under Relevant DGR Conditions)

Adam David Mumford¹, Marcos Martinez-Moreno², Cristina Povedano-Priego², Mar Morales-Hidalgo², Miguel Ruiz-Fresneda², Yon Ju-Nam¹, Mohamed L. Merroun², Jesus J. Ojeda¹

¹Swansea University, Department of Chemical Engineering, United Kingdom; ²University of Granada, Department of Microbiology, Spain

Cation exchange parameters for Opalinus Clay and its confining units

Paul Wersin, Lukas Aschwanden, Mirjam Kiczka

University of Bern, Switzerland

Geochemical alteration in selected bentonites affected by thermal interaction with steel and saline solution hydration

Raúl Fernández, Carlos Mota-Heredia, Jaime Cuevas

Autonomous University of Madrid, Spain

Iron-bentonite interaction in a water-saturated low temperature environment: mineralogy and microstructure

María Jesús Turrero¹, Elena Torres¹, Pedro Luis Martín¹, Raúl Fernández², Ana Isabel Ruiz², Almudena Ortega², Antonio Garralón^1,2, Belén Notario³, Carlos Mota², Jaime Fernando Cuevas²

¹Ciemat, Madrid, Spain; ²UAM, Madrid, Spain; ³CENIEH, Burgos, Spain

Mineralogical evolution of COx claystone during in situ MCO experiment

Isabella Pignatelli¹, Nicolas Michau², Yannick Linard²

¹Université de Lorraine, Laboratoire CRPG, CNRS UMR 7358, 15 rue Notre-Dame des Pauvres, 54500, Vandœuvre-lès-Nancy, France; ²Andra, Scientific & Technical Division, Waste, Radionuclides, Chemicals & Geochemistry Department, 1/7 rue Jean Monnet, F-92298 Châtenay-Malabry CEDEX, France

Anoxic corrosion of carbon steel in different cementitious media and high temperature conditions: comparison between laboratory test and in situ experiment results

Charles Wittebroodt¹, Jules Goethals², Bojan Zajec³, Valery Detilleux⁴, Laurent De Windt⁵

¹IRSN, France; ²CEA, France; ³ZAG, Slovenia; ⁴Bel-V, Belgium; ⁵Mines Paris, France

Redox buffering by iron-bearing clay minerals in the ferrous iron/smectite system

Harry J. L. Brooksbank², Anke Neumann^1,2

¹PSI Paul Scherrer Institut, Switzerland; ²Newcastle University, UK

Modelling the reactive transport processes in unsaturated clay barriers – inclusion of capillary geochemistry

Shao-Jie Wu, Majid Sedighi, Andrey Jivkov

The University of Manchester, United Kingdom

Microbial ecology of engineered barrier components of a deep geological repository for used nuclear fuel

Rachel C. Beaver¹, Rhiannon Punch¹, Cailyn Perry¹, Claire S. Tully², Katja Engel¹, Melody A. Vachon¹, W. Jeffrey Binns³, Chang Seok Kim³, James J. Noël², Josh D. Neufeld¹

¹University of Waterloo, Waterloo, Canada; ²Western University, London, Canada; ³Nuclear Waste Management Organization, Toronto, Canada

Steel corrosion and reactive transport model in bentonite for predicting spent fuel disposal package lifetime

Milan Hokr¹, Lucie Baborová², Jan Šembera¹, Vratislav Žabka¹, Jan Stoulil³, Dušan Vopálka², Eva Bedrníková⁴, Petr Večerník⁴, David Dobrev⁴

¹Technical University of Liberec, Czech Republic; ²Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Czechia; ³University of Chemistry and Technology Prague, Czechia; ⁴ÚJV Řež, a.s., Czechia

Experimental study of swelling and permeability of a Bavarian bentonite, Friedland clay, and Opalinus clay at 35–150 °C

Artur Meleshyn, Matthias Hinze, Marvin Middelhoff

GRS gGmbH, Germany

A new experimental system for studying gas formation and release during laboratory rock core heating experiments

Christian Ostertag-Henning, Oliver Helten

Federal Institute for Geosciences and Natural Resources (BGR), Germany

Temperature Influence on Swelling Pressure of Ca-Bentonite up to 150 °C

Deuk-Hwan Lee, Gi-Jun Lee, Seeun Chang, Minhyeong Lee, Seok Yoon, Chnagsoo Lee, Dong-Keun Cho

Korea Advanced Energy Research Institute, Korea, Republic of (South Korea)

The CHENILLE experiment: Coupled beHaviour undErstaNdIng of fauLts: from the Laboratory to the fiEld

Rüdiger Giese¹, Audrey Bonnelye², Pierre Dick³, Carolin Böse¹, Stefan Lueth¹, Ben Norden¹, Katrin Plenkers⁴, Roman Esefelder⁵, Christian Cunow¹, Sven Fuchs¹

¹German Research Centre for Geosciences GFZ, Germany; ²Université de Lorraine, Georessources, Ecole des Mines de Nancy, France; ³Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SPDR/LETIS, Fontenay-aux-Roses, F-92260, France; ⁴4 Gesellschaft für Material­prüfung und Geophysik (GmuG), Bad Nauheim, Germany; ⁵Friedrich-Schiller-Universität, Institut für Geowissenschaften, Jena, Germany

COCONS: A numerical tool for Thermo-Hydro-Mecanical dimensioning of a deep geological repository High Level Waste area

Florian Escoffier, Sylvie Granet, Geoffroy Mélot, Isabelle Rupp

EDF R&D, France

HotBENT at the Grimsel Test Site - Early THMC evolution of a buffer at up to 200°C

Florian Kober¹, Raphael Schneeberger¹, Stefan Finsterle², Stratis Vomvoris¹, Bill Lanyon³

¹Nagra, Switzerland; ²Finsterle GeoConsulting, LLC, Kensington, CA, United States; ³Fracture Systems Ltd., St. Ives, Great Britain

Thermo-hydraulic characterization of bentonite in partially saturated conditions at two temperature levels

Eleonora Crisci¹, Raphael Schneeberger², Alexandros Papafotiou², Florian Kober²

¹Nesol Numerical Engineering Solutions, Lausanne, Switzerland; ²Nagra, National Cooperative for the Disposal of Radioactive Waste, Wettingen, Switzerland

Identification of key parameters in coupled thermal-hydraulic analysis model for unsaturated Kunigel V1 bentonite

Yusaku Takubo¹, Yusuke Takayama², Keisuke Ishida¹

¹Nuclear Waste Management Organization of Japan (NUMO), Japan; ²Japan Atomic Energy Agency (JAEA), Japan

Thermally Aged (165oC-200oC) Bentonite Performance

Sirpa Kumpulainen¹, Jari Martikainen¹, Teemu Laurila¹, Olivier Leupin², Florian Kober²

¹MITTA, Finland; ²Nagra, Switzerland

Swelling, outflow, and permeability characteristics of bentonite in NaCl solutions of various concentrations

Masanori Kohno, Shun Kohdo, Tsuyoshi Nishimura

Tottori University, Japan

Modelling air convection in a segmented buffer

Peter Eriksson

SKB, Sweden

Mineralogical and geotechnical characterization of two German bentonites from Westerwald and Bavaria

Ali Asaad¹, Antonia Nitsch², Wiebke Baille², Katja Emmerich¹

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

Implications of groundwater composition on the performance of ben-tonite components in nuclear waste disposal facilities

Han Ming Lai¹, Lidija Zdravkovic¹, David M. Potts¹, Matthew Kirby²

¹Imperial College London, United Kingdom; ²Nuclear Waste Services, UK

The alteration of bentonite in contact with carbon steel

Šárka Šachlová¹, Petr Bezdička², Michaela Matulová³, Vlastislav Kašpar¹, Karol Kočan¹, Zbyněk Veselka⁴, Petr Večerník¹

¹ÚIJV Řež, a.s., Radioactive waste and decommissioning; ²Institute of Inorganic Chemistry of the Czech Academy of Sciences; ³Radioactive Waste Repository Authority; ⁴ÚJV Řež, a. s., Integrity and Technical Engineering,

Numerical Modelling of Volume Change Behaviour in Bentonite Buffer Exposed to Thermo-Hydraulic Gradients

Pavan Kumar Bhukya¹, Nandini Adla¹, Wang Xuerui², Dali Naidu Arnepalli¹

¹Department of Civil Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu, India; ²Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Braunschweig, Germany

Shear resistance of bentonite with non-uniformity distribution in suction

Tomoyoshi Nishimura¹, Takayuki Motoshima², Sachie Iso²

¹Department of Civil Engineering, Ashikaga University, Tochigi, Japan; ²Nuclear Facilities Division, Taisei Corporation, Tokyo, Japan

Verification of Von Mises and modified Cam clay models’ imple-mentation using analytical solutions. Triaxial tests simulation.

Jordi Alcoverro¹, Xavier Pintado², Juha Kuutti³, Ville Heino⁴

¹Technical University of Catalonia, Spain; ²Mitta Engineering Oy, Finland; ³VTT, Finland; ⁴Posiva Oy, Finland

Reactive transport models of the interactions of corrosion products and unsaturated FEBEX bentonite in laboratory and in situ tests

Javier Samper, Alba Mon, Luis Montenegro

Universidad de A Coruña, Spain

The impact of NaNO3 on the diffusion of dissolved gases in clay

Elke Jacops¹, Chloé Roonacker², Hannes Claes³, Lander Frederickx¹, Anneleen Vanleeuw¹, Phung Quoc Tri¹, Jerry Peprah Owusu^4,6, Jon Harrington⁵, Andy Wiseall^5,7, Christophe Bruggeman¹

¹SCK CEN, Belgium; ²ULg, Belgium; ³KU Leuven, Belgium; ⁴PSI, Switzerland; ⁵BGS, United Kingdom; ⁶University of Bern, Switzerland; ⁷NWS, United Kingdom

Modelling of mock-up tests for bentonite seals

Sonja Kaiser¹, Aqeel Afzal Chaudhry¹, Martin Hofmann¹, Thomas Nagel^1,2

¹TU Bergakademie Freiberg, Freiberg, Germany; ²Freiberg Center for Water Research - ZeWaF, Freiberg, Germany

A study on buffer-material erosion under constant water head condition

Kenji Ishii¹, Akihiro Matsumoto¹, Ichizo Kobayashi¹, Hirohito Kikuchi², Daisuke Hayashi²

¹Kajima Corporation, Tokyo, Japan; ²Radioactive Waste Management Funding and Research Center, Tokyo, Japan

Filling efficiency of mono-sized pellets for sealing boreholes for a wide range of borehole-to-pellet diameter ratios

Ayaka Sakaki¹, Toshihiro Sakaki²

¹International Christian University, Japan; ²ESE Consulting LLC, Japan

Gas in radwaste deep geological repositories: example from Bure URL in clay rich formation

Rémi DE LA VAISSIERE, Jean TALANDIER, Christophe DE LESQUEN, Gilles ARMAND

ANDRA, France

Particle size evolution of granular bentonite on wetting and loading

Hao Zeng¹, Laura Gonzalez-Blanco^2,1, Enrique Romero^1,2

¹Universitat Politècnica de Catalunya (UPC), Barcelona, Spain; ²International Centre for Numerical Methods in Engineering (CIMNE), Barcelona, Spain

Role of poromechanical couplings in gas fracturing around an excavation

Mohammad-Youssef FALLAH-SOLTANABAD¹, Amade POUYA¹, Laurent BROCHARD¹, Minh-ngoc VU², Christophe DE LESQUEN²

¹Navier Laboratory, Ecole des Ponts ParisTech, Gustave Eiffel University, CNRS, 77455 Marne la Vallée, France; ²Andra R&D, 92290 Châtenay-Malabry, France

Impact of Heterogeneity in 3D THM-G Modelling of Laboratory to Field-Scale Tests in the Context of Nuclear Waste Repository Design

Erdem Toprak, Sebastia Olivella

CIMNE, Spain

Assessment of the effect of heterogeneities on the hydromechanically coupled behavior of two German bentonites

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

¹Ruhr-Universität Bochum, Germany; ²Karlsruhe Institute of Technology (KIT), Germany

Design of HLW emplacement drifts in the Swiss deep geological repository in squeezing conditions

Julia Leuthold¹, Linard Cantieni¹, Peter Kirchhofer²

¹Nagra, Switzerland; ²AFRY Schweiz AG, Switzerland

Influence of geological and geotechnical boundary conditions on the host rock behavior – experiences from the twin niches in Mont Terri

Gesa Ziefle¹, Tuanny Cajuhi¹, Stephan Costabel¹, Antoine Fourriere¹, Markus Furche¹, Jana Gerowski¹, Bastian Graupner², Jürgen Hesser¹, David Jaeggi³, Kyra Jantschik⁴, Tilo Kneuker¹, Olaf Kolditz^5,6, Herbert Kunz¹, Jobst Maßmann¹, Andreas Möri³, Christian Ostertag-Henning¹, Marc Wengler⁷

¹Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Germany; ²Eidgenössisches Nuklearsicherheitsinspektorat (ENSI), Switzerland; ³Bundesamt für Landestopografie (swisstopo), Switzerland; ⁴Gesellschaft für Anlagen- und Reaktorsicherheit (GRS), Germany; ⁵Helmholtz-Zentrum für Umweltforschung GmbH (UFZ), Germany; ⁶Technische Universität Dresden (TU Dresden), Germany; ⁷Bundesgesellschaft für Endlagerung (BGE), Germany

Non-isothermal behavior of excavation damaged zone around deep radioactive waste disposal

Saeed Tourchi¹, Arash Lavasan¹, Antonio Gens²

¹University of Luxembourg; ²Barcelona Tech (UPC)

Pore-water pressure response and permeability evolution around excavations in claystone beyond the EDZ

Álvaro D. Suárez¹, Miguel A. Mánica¹, Eric Simo^2,4, Sandra E. Perales³, Thomas Nagel⁴

¹Institute of Engineering, National Autonomous University of Mexico, Mexico City, Mexico; ²BGE TECHNOLOGY GmbH, Peine, Germany; ³Mextypsa, Mexico City, Mexico; ⁴Geotechnical Institute, TU Bergakademie Freiberg, Germany

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

In-situ radionuclides diffusion experiment in a thermal gradient in the sandy facies of Opalinus Clay

Guillaume Pochet¹, David Jaeggi², Frank Heberling³, Bastian Graupner⁴, Will Bower⁵, Guido Deissmann⁶, Myriam Agnel⁷, Fabiano Magri⁸, Agnes Vinsot⁷, Christoph Borkel⁸, Carl Dietl⁸, Frederic Bernier¹, Cedric Barroo¹, Maryna Surkova¹, Yuankai Yang⁶, Sanduni Ratnayake³, Vanessa Montoya⁹

¹FANC, Brussels, Belgium; ²Swisstopo, Wabern, Switzerland; ³KIT, Karlsruhe, Germany; ⁴ENSI, Brugg, Switzerland; ⁵NWS, Cumbria, UK; ⁶Forschungszentrum Juelich, Juelich, Germany; ⁷ANDRA, Bure, France; ⁸BASE, Berlin, Germany; ⁹SCK CEN, Mol, Belgium

A batch and diffusion investigation of the mobility of selenide into the Callovo-oxfordian argillite

Sebastien SAVOYE¹, Nathalie COREAU¹, Serge LEFEVRE¹, Emilie THORY¹, Benoit MADE², Jean-Charles ROBINET², Romain DAGNELIE¹

¹Paris Saclay University, CEA, France; ²Andra, France

DIFFUSION AND RETENTION OF DIVALENT TRANSITION METAL TRACERS IN COMPACTED ILLITE CONVERTED TO DIFFERENT CATIONIC FORMS

Dimitra Zerva^1,2, Martin Glaus¹, Sergey Churakov^1,2

¹Paul Scherrer Institute; ²Univerisity of Bern

Predictive modelling of radionuclide sorption on Boom Clay

Delphine Durce¹, Lian Wang¹, Liesbeth Van Laer¹, Norbert Maes¹, Stephane Brassinnes²

¹SCK CEN, Belgium; ²ONDRAF/NIRAS, Belgium

BGR research on claystone in the Mont Terri rock laboratory

Jürgen Hesser, Gesa Ziefle

Federal Institute for Geosciences and Natural Resources, Germany

Nagra’s post-closure safety case for the general license application

Olivier X Leupin¹, Ashley Brown¹, Valentyn Bykov¹, Nikitas Diomidis¹, Typhaine Guillemot¹, Priska Hunkeler¹, Hoda Javanmard¹, Thomas Kämpfer², Xiaoshuo Li¹, Paul Marschall¹, Lukas Martin¹, Alexandros Papafotiou¹, Martin Schoenball¹, Paul Smith³, Raphael Wüst¹

¹Nagra, Switzerland; ²Eastern Switzerland University of Applied Sciences; Oberseestrasse 10, 8640 Rap-perswil, Switzerland; ³SAM-LTD, Switzerland

Demonstration testing program on backfill system for the post-closure phase of the French radioactive waste disposal

Youssef Fawaz¹, Rémi de La Vaissière¹, Jean Talandier², Jad Zghondi¹, Gilles Armand¹

¹Andra, Meuse/Haute-Marne Underground Research Laboratory, Bure, France; ²Andra, Châtenay-Malabry, France

Design of concrete-based segmental liners for a potential German HLW/SF repository in claystone

Philipp Herold¹, Ajmal Gafoor¹, Eric Simo¹, David Seidel¹, Andreas Hucke², Sven Bock², Benedikt Wöhrl², Axel Studeny²

¹BGE TECHNOLOGY GmbH, Germany; ²DMT GmbH & Co. KG

Excavation of the Konrad 2 shaft landing station in a clay and marl claystone: numerical modelling of excavation and support measures

Mirko Polster¹, Lothar te Kamp², Michael Breustedt³, Stephan Gehne³

¹BGE Technology, Germany; ²ITASCA, Gelsenkirchen, Germany; ³BGE, Germany

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

Preliminary study of iron-clay interactions in clay samples col-lected in the Kiirunavaara iron mine, Kiruna, northern Sweden

Satoru Suzuki¹, Tatsuya Fujimura², Kanya Kimura², Ryosuke Kikuchi², Takahiro Goto¹, Ulf B Andersson³, Tsubasa Otake², Tsutomu Sato²

¹Science and Technology Department, NUMO, Japan; ²Hokkaido University, Japan; ³LKAB, Kiruna, Sweden

The microbial community in bentonites B27 and GMZ and its in-fluence on cast iron corrosion

Sean Ting-Shyang Wei, Sindy Kluge, Paul Chekhonin, Vanessa Dykas, Cornelia Kaden, Nicole Matschiavelli

Helmholtz-Zentrum Dresden-Rossendorf, Germany

Modelling the evolution of a bentonite-cementitious backfilling grout for HLW disposal cell

Kevins Rhino¹, Nicolas Marty¹, Sylvain Grangeon¹, Nicolas Maubec¹, Catherine Lerouge¹, Esra Orucoglu¹, Mathieu Debure¹, Sebastien Jego¹, Nicolas Michau², Xavier Bourbon², Christelle Martin²

¹BRGM, F-45060 Orléans, France; ²Andra, 1/7 Rue Jean Monnet, 92298, Châtenay-Malabry CEDEX, France

Evolution upon contact with water of a bentonite-cement backfilling grout: insights from laboratory and in situ mineralogical characteriza-tions and from geochemical modelling

Sylvain Grangeon¹, Mathieu Debure¹, Valerie Montouillout², Erik Elkaïm³, Catherine Lerouge¹, Nicolas Maubec¹, Nicolas Michau⁴, Xavier Bourbon⁴, Christelle Martin⁴, Benoit Cochepin⁴, Nicolas Marty¹

¹BRGM, F-45060 Orléans, France; ²Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), CNRS UPR 3079, 1D avenue de la Recherche Scientifique 45071 Orléans, France; ³Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin 91190, France; ⁴Andra, 1/7 Rue Jean Monnet, 92298, Châtenay-Malabry CEDEX, France

In-situ long-term interactions between different concrete formulas and COx claystone in a deep disposal context

Catherine Lerouge¹, Nicolas Maubec¹, Guillaume Wille¹, Christine Flehoc¹, Catherine Guerrot¹, Stéphane Gaboreau¹, Yannick Linard², Francis Claret¹

¹BRGM, France; ²ANDRA, France