Skanska has won a SEK 1 billion contract from Svensk Kärnbränslehantering AB (SKB) to expand the Short-Lived Radioactive Waste Repository (SFR) in Forsmark, Sweden.
The new agreement marks the start of the project’s production phase. Earlier, Skanska completed the design phase under a separate contract.
Under the contract, Skanska will build six underground rock caverns for short-lived low- and intermediate-level radioactive waste. Each cavern will measure 240 to 275 meters in length and sit 120 to 140 meters below ground.
In addition, the company will carry out rock excavation, civil works, earthworks, water and sanitation work, and tunnel lining.
The project will expand Sweden’s capacity to store radioactive waste from its nuclear power plants. At present, the SFR facility stores about 63,000 cubic meters of operational waste. The expansion will add about 117,000 cubic meters of new storage space for both operational and decommissioning waste.
Construction will begin in the third quarter of 2026. Skanska expects to finish the work by the fourth quarter of 2028. After that, SKB plans to prepare the expanded facility for test operations in 2030–2031.
Overall, the project supports Sweden’s long-term nuclear waste strategy. It also strengthens Skanska’s role in building large underground infrastructure projects.
