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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