Jul 12, 2025 - Inside The World`s First Nuclear Underground Waste Tomb
Beneath Finland`s ancient bedrock lies a groundbreaking experiment in long-term nuclear waste management. Onkalo is the world`s first permanent underground repository for spent nuclear fuel — a deep geological facility designed to safely isolate radioactive waste for hundreds of thousands of years. We travel 435 meters below Olkiluoto Island to explore how Finland is tackling one of the most pressing challenges in the nuclear energy debate: what to do with the waste.