Skanska secures SEK 1 billion contract for Forsmark nuclear repository

The project shifts from the design phase into full-scale production, with work scheduled to commence in the third quarter of 2026. Engineers will excavate tunnels between 240 and 275 meters in length, positioned 120 to 140 meters underground to align with the base of the current facility. The construction scope spans extensive rock excavation, tunnel lining, and essential civil and sanitation infrastructure.

This expansion is vital for the future of Sweden’s nuclear energy sector. While the current SFR site manages roughly 63,000 cubic meters of operational waste, the new caverns will nearly triple that capacity by adding 117,000 cubic meters of storage space. This additional room is designed to accommodate both ongoing operational waste and materials resulting from the eventual decommissioning of the country's nuclear plants. Skanska expects to wrap up its contractual obligations by the end of 2028, setting the stage for the facility to begin test operations between 2030 and 2031.