Not sure about waste, can someone else here speak to that? Also deaths per unit energy are incredibly low relative to other sources.
It's also important to highlight that the UPower design can consume the entire actinide vector because it uses fast neutrons. A lot of the longer lived actinides cannot be fissioned or transmuted effectively by thermal neutrons so they just build up.
We like to say we are the ultimate disposal, and can take anything, including the waste from other waste consumers.