A combination of Fusion and Fission processes using Heavy Water; this is a powerful and long-lasting energy source that lasts until the Heavy Water looses potency. It can never run out of fuel due to the constant splitting and fusing of atoms, but after a while it looses the amount of the power released after a couple of decades. In most ships, the reactor is specialized so it runs on fuel cells called fusion bottles. Fusion bottles are easy to insert into the ship reactor and decrease time needed in the re-fueling process.