Nuclear advancements slowed down due to PR problems from clear and sometimes catastrophic failure of commercial power plants (Three Mile Island, Chernobyl, Fukushima) and the vastly higher costs associated with building safer plants.
If anything the weapons kept the industry trucking on - if you want to develop and maintain a nuclear weapons arsenal then a commercial nuclear power industry is very helpful.
If anything the weapons kept the industry trucking on - if you want to develop and maintain a nuclear weapons arsenal then a commercial nuclear power industry is very helpful.