Thanks for this link. I've only read a few sections, but I can't find any cost info at all. Also they're not really saying anything about waste management that's useful. Summary: "The SRWS processes solid waste by dewatering, decontaminating, surveying, sorting, and classifying solid waste for storage and eventual shipment to licensed offsite facilities." (basically the same process with the same issues I have with "regular" nuclear plants). They do answer my water concerns, though - looks like no external cooling water is needed in normal operation, but their design is food susceptible so it needs to be built in places that cannot flood.