Sure, today, military-grade plutonium is down-blended in MOX fuels. But your own source backs up the fact that from the 1950's to the 1980's (the time period we

Sure, today, military-grade plutonium is down-blended in MOX fuels. But your own source backs up the fact that from the 1950's to the 1980's (the time period we are talking about) the USA was the world's leading uranium ore producer. One could argue that the mines were subsidized by the federal government (so they could enrich and breed nuclear-grade materials), but that is a far cry from GP's claim that "Once the direct subsidy of nuclear via the military's nuclear weapons buildout went away, new plant construction... went way", which is incomparable to the degree of subsidization as the USSR and their dual-use for RBMK reactors (why else design a reactor with a positive void coefficient). EDIT: I'm not sure whether you're really concerned about the buildout of nuclear powerplants or the evolution of the USA's policy with regards to the nuclear fuel cycle, but I hope I addressed both. EDIT2: Also: The "big 3" enrichment locations that the military used would also sell to civilian nuclear powerplants. But that's a far cry reason to "subsidize" the construction of nuclear powerplants. This "fuel subsidization" goes on today (MOX fuels) and the American monopoly of uranium enrichment has been broken since 1970 with the formation of Urenco, so the commercial civilian powerplants have always had other places to purchase from (if a regulatory hassle). There's really not a lot of strong evidence that the mining and enrichment of uranium for nuclear weapons somehow subsidized the construction of civilian nuclear powerplants.