Is there a source to learn more about how wind/solar are "intermittent" solutions? I personally think fission's worst case disaster scenario is much worse than

Is there a source to learn more about how wind/solar are "intermittent" solutions? I personally think fission's worst case disaster scenario is much worse than coal's. Imagine living in a tiny country like S. Korea and getting their nuclear plants blown up by N. Korea agents. The whole country might become uninhabitable. That's not even considering the waste.