Research Conducted in ONKALO

The research conducted in ONKALO gives further information on the bedrock and groundwater conditions of the final disposal site, as well as on the impact of the construction on these conditions. Furthermore, it serves the construction process and its planning while the work is underway, as well as all planning and design needs associated with the repository.

The research conducted in ONKALO helps to ensure the suitability of the Olkiluoto bedrock for the final disposal. Research conducted from ONKALO also helps to identify the areas where the construction of the final disposal tunnels is the most cost-effective.

Studies closely associated with construction aim to facilitate the success of the excavation process and the efficiency of the strengthening and sealing measures, and in this way closely contribute to the construction process. Studies conducted during the access tunnel construction also help to test and develop research methods for the future research needs of the actual repository.

Geological mapping is the method for collecting information related to the tunnel walls. Information about the rock to be excavated is obtained by drilling probe and pilot holes. From the tunnel, it is also possible to perform exploratory drillings and to study the groundwater flowing into the tunnel.