Sweden has started building the world’s second-ever long-term storage facility for spent nuclear fuel. The site is located in Forsmark, Sweden, approximately 90 miles north of Stockholm, Sweden.
The site is designed to securely contain highly radioactive waste for 100,000 years. Finland remains the only other country nearing completion of a permanent storage solution for nuclear waste.
Permanent storage for nuclear waste has been a longstanding challenge for the industry since the advent of commercial nuclear reactors in the 1950s.
Globally, around 300,000 tons of spent nuclear fuel are awaiting disposal, according to the World Nuclear Association. Nuclear scientists currently store most of this waste in cooling ponds near the reactors that produce it.
The Forsmark repository will feature nearly 40 miles of tunnels buried over 1,600 feet deep in bedrock estimated to be 1.9 billion years old.
Engineers designed the site to hold 12,000 tons of spent nuclear fuel. The fuel will be encased in corrosion-resistant copper capsules, packed in clay and buried.
Officials expect the site to begin receiving waste in the late 2030s, and final closure is projected for around 2080, when the site reaches capacity.
However, the project faces potential delays due to safety concerns. MKG, the Swedish nongovernmental organization Office for Nuclear Waste Review, filed an appeal with a Swedish court calling for additional reviews of the facility.
MKG highlighted research suggesting the copper capsules could corrode over time, potentially releasing radioactive elements into groundwater.
The estimated cost of developing the repository exceeds $1 billion, and will be funded by Sweden’s nuclear industry. It is intended to store waste from the country’s existing nuclear power plants, but will not accommodate waste from future reactors. Sweden already announced plans to construct 10 additional nuclear reactors by 2045.