Reactor
The Reactor is the main system on the power bus that creates power. In the Engineering Software there are two reactors, the Habitat reactor, and the Ayse reactor. Both of these reactors work on the same principles, but the Ayse reactor is capable of much higher power output.
Habitat Reactor
The Habitat uses two tokamak reactors which use a deuterium-tritium fusion reaction to generate power. The reactors are supplied with fuel from the main fuel tanks, which contain 78 t of lithium and 22 t of deuterium. The Habitat reactors, although they are separate entities, are shown as only one reactor in the Engineering software.
Ayse Reactor
The Ayse Drive uses the same tokamak fusion reactors as the Habitat, except on a much larger scale; the reactors are 14.5x more powerful then the Habitat reactors.