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Task Force meeting #29, Lund, November 2012 - Task 8 1
Some ideas for continuation of Task 8
• Task 8 is intended to lead to:
– Scientific understanding of the exchange of water across the bentonite-rock interface
– Better predictions of the wetting of the bentonite buffer
– Better characterisation methods of the canister boreholes
– Better methods for establishing deposition hole criteria
Task Force meeting #29, Lund, November 2012 - Task 8 2
Some ideas for continuation of Task 8
Task 8e Prediction of deposition hole interactionsStand alone simulations (no direct BRIE
interaction)Open and closed deposition hole issuesBack filled deposition tunnels issues
Task Force meeting #29, Lund, November 2012 - Task 8 3
Some ideas for continuation of Task 8
• Synthetic site • Another site e.g. ONKALO• Prototype
Task Force meeting #29, Lund, November 2012 - Task 8 4
Some ideas for continuation of Task 8
Task Force meeting #29, Lund, November 2012 - Task 8 5
Some ideas for continuation of Task 8
Task Force meeting #29, Lund, November 2012 - Task 8 6
Some ideas for continuation of Task 8
450 m depth
Task Force meeting #29, Lund, November 2012 - Task 8 7
Some ideas for continuation of Task 8
•A Tunnel Boring Machine (TBM) was used for excavating the drift, 65 m long and 5 m in diameter. A data acquisition tunnel was excavated sub parallel to the repository drift.A sump was bored so the wet inner part of the tunnel could be drained.
•Six vertical deposition holes, 8.37 m deep and 1.75 m in diameter, were bored in the tunnel.
•The Prototype Repository is divided in two sections, both ending with a concrete plug.
•The deposition holes are equipped with heaters and buffer as in CRT.
•The first 11 m tunnel in section 1 is backfilled with crushed rock and the remaining tunnel with 30% bentonite and 70% crushed rock.
Task Force meeting #29, Lund, November 2012 - Task 8 8
Some ideas for continuation of Task 8
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