You are confusing libertarians and anarchists. Libertarian would be a nuclear engineer that thinks nuclear energy plants are dangerous, so they should be strictly controlled and confined within the strictest safety procedures, and while the usability of their nuclear reaction can be harnessed to perform some functions that are hard to achieve otherwise, the said nuclear reaction should be strictly confined to these functions and not to be allowed to be spread outside of them. Would you really want a nuclear engineer that thinks otherwise to be in charge of a nuclear plant near you? Maybe some type that his first solution to any problem is sprinkling some uranium on it and seeing if the radiation solves it? And when it doesn't work saying maybe it's because it's not radioactive enough, so we need more uranium there?