I can't build Nuclear Rector

Expunger wrote:

[I've] researched level 1 for Nuclear Reactor, yet I do not have the option to build. WHY NOT[?]

Well, because you need to complete the research for nuclear power level 2 before you may build a reactor.

Please see the notes for nuclear power L1 and L2.

Cheers, and welcome to the Forum, Expunger.