Bedrock

Because bedrock in Olkiluoto’s final disposal area has been thoroughly studied, bedrock weakness zones, mechanically or chemically unstable sections and significant water flow routes can be avoided in final disposal.

Bedrock separates spent fuel physically from the biosphere and nature. It also makes it almost impossible for humans to access the repository. In addition, bedrock provides predictable mechanical, geochemical and hydrogeological conditions for the engineered barriers.