Bastian GRAUPNER, Switzerland
|Member(s):||All NEA member countries|
Under the NEA Statute
International Atomic Energy Agency (IAEA)|
|Date of creation:||01 January 1991|
|End of mandate:||31 December 2018|
Mandate (Document reference):
Mandate (Document extract):
Extract from document NEA/RWM/CLAYCLUB(2016)3
The Clay Club promotes the exchange of information and shared approaches and methods to develop and document an evolving understanding of clay media as a host rock for a repository.
The Clay Club generally establishes the programme of work at its own initiative, based on experience, consensus and progress in repository programmes of its member countries. The work programme and products are presented at each IGSC plenary meeting. The Clay Club may also carry out specific tasks at the request of the IGSC dealing with, for instance, the barrier performance of clays for repository safety case purposes.
The Clay Club provides advice to the IGSC on major and emerging issues related to the understanding of the multi-scale characterisation, numerical model simulation and barrier performance of argillaceous media. In particular, the Clay Club addresses recommendations, trends and information gaps concerning issues such as:
current knowledge regarding the long-term barrier integrity of argillaceous rocks as relevant to establishing a deep geological repository safety case on time frames of one million years;
the development of best international practice with respect to multi-disciplinary laboratory, borehole and in situ characterisation of argillaceous sediments necessary to understand far-field phenomena governing repository evolution, behaviour and long-term performance;
a refinement of the understanding of repository-induced effects in argillaceous rocks during excavation, operation and post-closure phases;
the application of self-analogues, which at formation scale, provide direct up-scaled formation‑specific properties and evidence of past argillaceous groundwater system stability and resilience to external perturbations;
performance assessment, including development of integrated conceptual geosphere models,predictive numerical simulation and abstraction and, traceability of related data and information;
links and potential knowledge transfer between the understanding of clay as a host material and its use in engineered barrier systems for deep geological repositories;
relevant progress in research and development on argillaceous sediments in other fields or industries, such as oil and gas exploration (performance of cap rocks, unconventional shale oil , shale gas) and CO2 sequestration (performance of enclosing clay barriers).