[sketerpot]

We can use the U-238 in breeder reactors. Or make a subcritical blanket of U-238 and some of the longer-lived radioactive elements in spent fuel rods, and put them around a fusion reactor. The fusion reactor doesn't have to generate a net positive amount of usable energy; it just has to provide a lot of neutrons, which it does. This is the basis for fusion-fission hybrid systems, which can be marketed as nuclear-waste annihilation systems.