Task Force meeting #29, Lund, November 2012 - Task 8 1 Some ideas for continuation of Task 8 Task 8 is intended to lead to:Task 8 is intended to lead to:

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Presentation transcript:

Task Force meeting #29, Lund, November Task 8 1 Some ideas for continuation of Task 8 Task 8 is intended to lead to: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 Task 8 2 Some ideas for continuation of Task 8 Task 8e Prediction of deposition hole interactions Stand alone simulations (no direct BRIE interaction) Open and closed deposition hole issues Back filled deposition tunnels issues

Task Force meeting #29, Lund, November Task 8 3 Some ideas for continuation of Task 8Synthetic siteAnother site e.g. ONKALOPrototype

Task Force meeting #29, Lund, November Task 8 4 Some ideas for continuation of Task 8

Task Force meeting #29, Lund, November Task 8 5 Some ideas for continuation of Task 8

Task Force meeting #29, Lund, November Task 8 6 Some ideas for continuation of Task 8

Task Force meeting #29, Lund, November 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 Task 8 8 Some ideas for continuation of Task 8