How to re-enabled fission reactor in game.

[carpenterzxapp]

I cam across the Plutonium processing and when to start research and the prerequisites has been disabled.
I tracked it back to the fission reactor not being researched. From Bob's mod I believe, Is there a way to re-enabled it.

[Koub]

Unresearch and re-research the technologies you miss with those commands :
https://wiki.factorio.com/Console#Resea ... chnologies