The cost of the fuel is less than 0.1% of the cost of running a NPP. The cost of the fuel has almost nothing to do with the economics of nuclear power. And considering a liquid fueled reactor makes heat in the 900C range and a AP1400 makes heat in the 300C range, they aren't really substitutes for each other. The amount of incorrect information in this thread is truly shocking. For example, you can make synthetic fuel from a LFTR, you can't from a BWR or a PWR. That might be a valuable feature, don't you think.