cement and the waste will be left to decay ready the idea is that this final repository nears its guetta will be able to contain the radioactivity for 300000 years. thomas law which is the technical manager here he's overseeing the conversion of the concord mine into a functioning storage facility. and now i have the chance as a journalist to visit the construction site nearly a 1000 meters below ground i have to carry a self rescue kit if necessary they will supply oxygen to protect me against deadly mine gases. the tunnels extend for many kilometers iron ore was mined here for more than a century until 976. we drive through the labyrinth of passage ways. by journeys through millions of years of rock and clay strata. no don't jump no jumping. strict safety regulations are observed down here now it's his father was a miner and he followed in his father's footsteps to become a mining engineer today he's responsible for 1000 employees for few when i started working in mining 40 years ago i never thought i'd end up running a mine that was my dream but you never think it will happen to work