The problem is in part the anti-nuclear folks don't want the problem to be solved. So you can build a skyscraper 100 feet tall in a high earthquake zone, but you can't build a container. The normal approach (france etc) is to recycle and then vitrify the leftovers and store in a container. You get much shorter half lives, much less waste. So even if it comes out the container, it's still "in" something. Of course, you can build a reasonably secure container as well.