'The core of the reactor will be almost entirely filled with nuclear waste, which is a great way of disposing of it. Furthermore, the reactor should be able to operate for 60 years without refueling. Indeed, the spent fuel rods from nuclear power plants in the United States alone would be sufficient to cover the entire world's energy needs for centuries to come.'

I've always liked this win win way of disposing of nuclear waste. What isn't apparent in the article is the size of the 'mini' reactors and what the worst case scenario is for failures, and ways to lessen failure states.