I would definitely start with some of the openmc tutorials. https://docs.openmc.org/en/stable/usersguide/beginners.html https://docs.openmc.org/en/stable/users

I would definitely start with some of the openmc tutorials. https://docs.openmc.org/en/stable/usersguide/beginners.html https://docs.openmc.org/en/stable/usersguide/beginners.html If you're asking at a higher level, you end up in nuclear engineering school after having a nebulous interest in energy issues.