Err ... no ... the "nuclear" part comes from "nucleus", in the general sense, and the expression long predates nuclear technology. https://en.m.wikipedia.org/w

Err ... no ... the "nuclear" part comes from "nucleus", in the general sense, and the expression long predates nuclear technology. https://en.m.wikipedia.org/wiki/Nuclear_family https://en.m.wikipedia.org/wiki/Nuclear_family