It is designed to isolate waste for hundreds of thousands of years, with spent nuclear fuel sealed in copper canisters and surrounded by protective clay before burial. Finland’s approach follows a long-standing policy to manage its own nuclear waste domestically.

Credits: envato elements; Author: SteveAllenPhoto999;

The project could serve as a global model for nuclear waste disposal. Located in Onkalo, the site can store around 6,500 tonnes of nuclear waste for long-term containment. The facility has been under construction for decades, and is built about 430 metres deep in stable 1.9-billion-year-old bedrock to safely isolate the radioactive waste.