Sweden is storing the stuff in a room 500 meters (.25 miles) inside a hill. That isn't deep disposal. Deep is perhaps 5000 meters down, even 10000 meters, may

Sweden is storing the stuff in a room 500 meters (.25 miles) inside a hill. That isn't deep disposal. Deep is perhaps 5000 meters down, even 10000 meters, maybe also below the sea floor. Down there the rock is warm and flexible. And not in a room but just in the drilled hole. Diffusion back to the surface won't be a problem.