[What is that mod called?]

I was wondering what this mod is called in the older version of tekkit. It had the energy link. Anybody know? Thx.

[What is that mod called?]

In the older version of tekkit, they had a thing called a nuclear reactor and reactor chamber and things like that. Now they just have fission and fusion reactors. Can you plz tell me what the mod with the nuclear reactor is called? Thx.