"Assessment of barrier integrity in geological repositories for nuclear waste disposal and contaminant isolation":

Barrier integrity is a crucial aspect for the assessment of subsurface technologies. For the storage of thermal energy and other energy carriers, or the deposition of high-level nuclear or chemotoxic waste, different repository concepts in diverse geological candidate formations such as rock salt, clay stone and crystalline rock are being discussed. Computational methods and numerical simulations, in conjunction with experimental studies across scales from micro-scale to field scale, are an integral part of safety and environmental-impact assessment concepts involving barrier integrity as a key component. Reliable comparative analyses of potential technological options require coupled physical (thermo-hydro-mechanical chemical) models capturing the individual particularities of each rock type and associated geotechnical repository and barrier concept to a comparable level of sophistication. Structural as well as process complexity and large computational domains combine to render a reliable and efficient analysis a major challenge. This complexity is often met by data scarcity and variability, necessitating the theoretical and computational treatment of uncertainties and variability at different scales involved in numerical analyses at different levels.

This session provides a platform for the exchange of geophysical, geochemical, geotechnical knowledge for assessing the integrity of barriers and multi-barrier systems considering equally conceptual, theoretical, computational and experimental aspects.

"Towards a safe nuclear waste repository – geoscientific, technological, social and regulatory challenges and approaches":

The successful implementation of safe, deep geological disposal of spent fuel, high-level waste and other long-lived radioactive waste is one of the currently most pressing and important environmental challenges in several countries in Europe and worldwide. Site exploration and assessment are primarily geoscientific tasks that require interdisciplinary collaboration of different geoscientific disciplines, like geophysics, geochemistry, mineralogy, geomechanics, and geological as well as THMC modelling. Successful and socially accepted site selection and implementation, however, not only depend on geoscientific state-of-the-art results and R&D programs but to a large extend on targeted, adequate and well-designed public outreach and public involvement/participation activities as well as on suitable regulatory frameworks. Both, geoscientific and technological as well as social and regulatory aspects complement each other and need to be addressed.
This session therefore welcomes contributions from research organizations, NGOs, waste management organizations, and regulatory bodies. Topics may include, but are not limited to, advances in exploration and modelling tools and approaches, safety assessment strategies, disposal concepts, national and transnational public outreach and public involvement programs, national regulatory frameworks. Preference will be given to contributions that highlight the interdisciplinary and especially transdisciplinary character of deep geological disposal research

Convener: Thomas Nagel | Co-conveners: Jobst Maßmann, Klaus-Jürgen Röhlig, Darius Seyedi, Axel Liebscher, Claudia Schulz
| Mon, 08 Apr, 08:30–12:30, 14:00–15:45
Room 0.94
| Attendance Mon, 08 Apr, 16:15–18:00
Hall X1

Attendance time: Monday, 8 April 2019, 16:15–18:00 | Hall X1

Chairperson: Nagel, Liebscher
X1.114 |
Pressure Driven Percolation and Sealing of Pathways for Gases and Liquids in Rock Salt and Clay
Mathias Nest and Wolfgang Minkley
X1.115 |
State of the scientific and technical knowledge about limiting temperatures in the Repository Site Selection process of Germany with simultaneous consideration to Europe and other European repository concepts
Ute Maurer-Rurack and Axel Liebscher
X1.116 |
Georg Kosakowski and Barbara Lothenbach
X1.119 |
Jobst Maßmann, Gesa Ziefle, Stephan Costabel, Markus Furche, Bastian Graupner, Jürgen Hesser, David Jaeggi, Franz Königer, Karsten Rink, Rainer Schuhmann, and Klaus Wieczorek
X1.120 |
Bernhard Vowinckel, Jobst Maßmann, Gesa Ziefle, Thomas Nagel, Keita Yoshioka, Dmitri Naumov, and Carlos Guevara Morel
X1.122 |
Vinay Kumar, Jobst Maßmann, Thomas Nagel, Dimitri Naumov, Jan Thiedau, Wenqing Wang, and Hua Shao
X1.123 |
Diane Doolaeghe, Philippe Davy, Caroline Darcel, Romain Le Goc, and Jan Olof Selroos
X1.124 |
Milan Zuna, David Dobrev, Václava Havlová, Pavel Kus, and Daniela Doubravova
X1.125 |
Cornelius Fischer, Johannes Kulenkampff, Lotfollah Karimzadeh, Filip Jankovsky, Milan Zuna, and Vaclava Havlova
X1.127 |
Susanne Lehmann, Robin Steudtner, Ulrike Gerber, Thomas Zimmermann, and Vinzenz Brendler
X1.128 |
Toshihiko Ohnuki, Naofumi Kozai, Kazuya Tanaka, Kohei Tokunaga, Satoshi Utsunomiya, Ryohei Ikehara, Tatsuki Komiya, Ayaka Takeda, Daniel Kaplan, and Peter Santschi
X1.129 |
Marlena Rock, Florie Caporuscio, Kirsten Sauer, Katherine Norskog, and James Maner
X1.131 |
Filip Jankovský, Milan Zuna, Václava Havlová, Cornelius Fisher, Johannes Kulenkampff, Jaroslav Kotowski, Michal Polak, Milan Hokr, and Miroslav Cernik
X1.133 |
Patrick Schmidt and Holger Steeb
X1.135 |
Renata Adamcova and Magdalena Kondrcova