Excavation of world's first final deposition tunnels starts in Posiva's ONKALO facility

7.5.2021

As the operator responsible for the final disposal of spent nuclear fuel, Posiva Oy has started the excavation of the actual final disposal tunnels in Olkiluoto, located in the Eurajoki municipality. The start of the excavation is a significant milestone for Posiva, as it comes after years of development activities on research and methodology for rock construction. The Radiation and Nuclear Safety Authority of Finland (STUK) verified before the excavation started that the pre-conditions specified for starting the work had been fulfilled.