but it's less straighforward and developed. Uranium-based nuclear power produces plutonium. non-uranium based nuclear power is possible but requires technology development that in practice has taken much longer than expected.
Part of that development delay is the deliberate decision of the US (and other countries) to build the types of reactors that can produce weapons grade plutonium - for the express purpose of using it for nuclear weapons. Nuclear reactors are crazy expensive, so if the money comes from people who want Pu, then that's where the R&D goes.
