adrienne murray travelled to eurajoki to find out more.metre underground into the depths, where for the first time anywhere in the world, highly radioactive nuclear waste will be permanently stored. these tunnels span more than 50 kilometres. our depth at the moment is about 430 metres. eventually, they'll hold 6,500 tonnes of spent uranium — all the waste finland's five reactors will ever produce. it takes hundreds of thousands of years for radioactive waste to safely decay. and this underground tomb is the final resting place for finland's spent nuclear fuel. the bedrock here is almost two billion years old, and geologists think it's ideal for a nuclear graveyard. and the whole western finland is located in a really stable, geologically stable area. we have hardly any earthquakes, and the ground weather conditions are good for our concept. newsreel: a final disposal facility. .. | remote controlled machines will do the work slotting five metre copper canisters into holes in the rock before it's sealed off with clay and a thick concrete p