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The Future of ABM from Posiva's Point of View: Insights by Kari Koskinen and Petri Korkeakoski

This article discusses the objectives, arguments, and example of predicted changes related to the use of clays in Posiva's repository conditions for radioactive waste management. It emphasizes the importance of measurements and experimental data in understanding clay properties and their applicability in real-world scenarios.

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The Future of ABM from Posiva's Point of View: Insights by Kari Koskinen and Petri Korkeakoski

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  1. The future of ABM from Posiva point of view Kari Koskinen, Petri Korkeakoski Koskinen Kari

  2. General objectives • Argument why the clays we intend to use are applicable … • Delay in migration of solutes due to low hydraulic conductivity • High swelling pressure • Plasticity / deformability • … in (our) repository conditions. • in terms of groundwater composition • temperature of the near-field Koskinen Kari

  3. Objectives for ABM/LOT • Measurements of hydraulic conductivity, swelling pressure and plasticity • measurements should be justified • apperances outside the measured range of conditions should be reasoned • Changes of clay properties could be due to • changes in exchangable cations, • dissolution and precipitation of accessory minerals, • changes in montmorillonite surface charge, • changes in microstructure • Arguments derived from the first principles remain ahead of our capabilities • systematically generated experimental data remains essential Koskinen Kari

  4. Example of predicted changes

  5. A possible forthcoming test series

  6. Aspects influencing on tests dismantling • Construction license application (CLA) • Submission at the end of 2012 • No new material to CLA • Operation license application (OLA) • Submission at the end of 2018 • Investigations should be reported during 2018 • New material would be needed • Dismantling of tests? • Possibility for development of tests? • Development in terms of more realistic repository conditions … being more applicable for OLA Koskinen Kari

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