I really do wish NuclearCraft was back in the pack - it's almost certainly my favourite mod. It's so good now, and I would say it's the best reactor mod for 1.7.10. The dev has posted videos on the new fission and fusion mechanics, as well as his other update-specific videos, and I've had a lot of fun with it. There's now also steam fission and steam fusion reactors, but I haven't played with them much yet, or the particle accelerator.i discovered NuclearCraft, which is like BR... but with Explosions and higher Math and Chemistry and more RTGs... so i just sat there on the Curse page Drooling over myself cuz i love every aspect of it xD