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Finland's Onkalo Spent Fuel Disposal Facility Starts Drilling of First Disposal Hole

On the afternoon of August 26, 2026, Finland's Onkalo spent fuel final disposal facility commenced drilling of its first disposal hole deep in the bedrock at Olkiluoto. Posiva stated that the drilling operation is being carried out at a depth of more than 400 meters underground, with the drill bit beginning to cut into the approximately 1.9-billion-year-old Olkiluoto bedrock. Kimmo Lehtola, Posiva's Operations Construction Manager, explained that a kick-off meeting had been held the day before the operation, focusing on reviewing safety matters, technical specifications, and the detailed drilling plan. On the morning and early afternoon of the drilling day, the team completed final adjustments to the equipment, after which the drilling rig began its work. He noted that the team had previously completed...

2026-08-28

Finland's Onkalo Spent Nuclear Fuel Final Disposal Facility Expected to Receive Operating License by Year-End

Finland's spent nuclear fuel final disposal project has entered the critical stage of operating license review. The Radiation and Nuclear Safety Authority of Finland (STUK) issued a statement saying that the design and emergency response procedures of the Onkalo final disposal facility meet the safety requirements for granting an operating license. The Finnish government is expected to decide whether to approve the facility's operation before the end of the year. Onkalo is located on Olkiluoto Island in southwestern Finland. "Onkalo" means "cave" in Finnish. If licensed and operational, the facility will become the world's first deep geological final disposal facility for spent nuclear fuel from nuclear power plants, serving as a reference for other countries considering similar facilities...

2026-08-14

Finland's Onkalo Repository to Be Commissioned, Experts Say 100,000-Year Safety Assessment Still Faces Uncertainties

Finland's Olkiluoto is about to commission the world's first permanent deep geological repository for spent nuclear fuel — Onkalo. The facility is designed for long-term underground containment of spent fuel, with a design safety period of up to 100,000 years. There remains debate within the nuclear industry over whether such facilities can remain safe over such an immense timescale. Dmitry Pripachkin, head of the Department of Radiation Physics and Nuclear Technology Safety at the National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), stated that modern science does not yet possess tools capable of reliably predicting the state of such facilities after 100,000 years. Science can study the evolution of geological formations over long historical periods, but...

2026-08-09