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Workreport 2007-1

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Name:

Modelling of Hydro-Zones for Layout Planning and Numerical Flow Model in 2006, Part 1

Writer:

Ahokas, H., Vaittinen, T., Tammisto, E. & Nummela, J.

Language:

English

Page count:

212

Summary:

As part of the programme for the final disposal of spent nuclear fuel, a model was compiled of hydrogeologically significant zones on the Olkiluoto site. These deterministic zones dominate the groundwater flow especially deep in the bedrock, and because of their nature intersections by disposal tunnels will be avoided, if possible. For layout planning purposes, a brief description was made of the deformation zones of the geological model that intersect the planned repository area and are of hydraulic significance from the point of view of long-term safety. In addition, the hydraulic properties of the zones and the bedrock outside the zones needed for the numerical flow simulations were described.
Modelling was mainly based on hydrological observations including an extensive number of single-hole hydraulic tests as well as some long-term pumping test results. Some geophysical mise-a-la-masse results were also used in the compilation of the zones. A comparison between the modelled hydrogeological zones and the deformation zones identified in the geological model of the Olkiluoto site is also presented.

Keywords:

Hydrology, transmissivity, hydraulic conductivity, zone, layout, flow, disposal of spent nuclear fuel

File(s):

Modelling of Hydro-Zones for Layout Planning and Numerical Flow Model in 2006, Part 1 (pdf) (30.6 MB)


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