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Sweden starts building 100,000 year storage site for spent nuclear fuel
Published by Global Banking & Finance Review®
Posted on January 15, 2025
3 min readLast updated: January 27, 2026
Global Banking & Finance Review®
Company
Published by Global Banking & Finance Review®
Posted on January 15, 2025
3 min readLast updated: January 27, 2026
Sweden begins constructing a 100,000-year storage site for nuclear waste, marking a major step in nuclear waste management.
By Simon Johnson
FORSMARK, Sweden (Reuters) - Sweden started building a final storage facility for spent nuclear fuel on Wednesday, only the second such site in the world, where highly radioactive waste will be stored for 100,000 years.
How to store deadly radioactive waste until it is safe is a question that has dogged the nuclear industry since commercial reactors began operating in the 1950s.
Finland is the only country close to completing a permanent storage site.
"It is hard to exaggerate the significance for Sweden and for the climate transition of the fact that the building of the final repository is under way," Environment Minister Romina Pourmokhtari said. "They said it wouldn't work, but it does."
The World Nuclear Association reckons there are around 300,000 tons of spent nuclear fuel globally in need of disposal. Most of it is stored in cooling ponds near the reactors that produced it.
In addition to the spent fuel already produced, a number of countries in Europe and around the world are planning to build new reactors to provide electricity to power the transition away from fossil fuels.
The Forsmark final repository, about 150 kilometres north of Stockholm on Sweden's east coast, will consist of 60 km of tunnels buried 500 metres down in 1.9 billion year old bedrock.
It will be the final home for 12,000 tons of spent nuclear fuel, encased in 5 metre long, corrosion-resistent copper capsules that will be packed in clay and buried.
The facility will take its first waste in the late 2030s but will not be completed until around 2080 when the tunnels will be backfilled and closed, Sweden's Nuclear Fuel and Waste Management Company (SKB) said.
The process, however, could still be delayed. MKG, a Swedish non-governmental organisation working on nuclear waste, has lodged an appeal with a Swedish court calling for further safety checks.
It said research from Sweden's Royal Institute of Technology showed the copper capsules could corrode and leak radioactive elements into the ground water.
"We have room to wait ten years to make a decision, given this is something that has to be safe for 100,000 years," Linda Birkedal, chair of MKG said.
The Forsmark repository will cost around 12 billion crowns($1.08 billion) and be paid for by the nuclear industry, SKB said.
It will have room to hold all the waste produced by Sweden's nuclear power plants.
However, it will not hold fuel from future reactors. Sweden plans to build 10 more reactors by 2045.
($1 = 11.1561 Swedish crowns)
(Reporting by Simon Johnson; Editing by Christina Fincher)
The Forsmark repository is designed to be a final storage facility for 12,000 tons of spent nuclear fuel, ensuring safe disposal of highly radioactive waste.
The facility will begin accepting waste in the late 2030s, but it will not be fully completed until around 2080.
Safety concerns include the potential corrosion of copper capsules that could lead to radioactive leakage into groundwater, prompting calls for further safety checks.
The construction of the Forsmark repository is estimated to cost around 12 billion crowns, which will be funded by the nuclear industry.
Sweden's Forsmark repository is only the second permanent storage site in the world, with Finland being the only country close to completing a similar facility.
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