Lets hope they really build concrete walls and did not just dig a hole. That reminds me of "Atommülllager Gorleben" in Germany where they started to temporarely put some atomic waste until another/better place is found. That was 12 years ago and they are still looking for a better place...

In the meantime the involved people fight against water which flows into the tunnels reaching the containers with the nuclear waste and they try to get back the waste which is harder as supposed.