You had a bunch of nuclear reactors on Aquilo anyway, right? Now you can put them to use.

This mod is a Space Age only add-on to Bluetonium, that is designed to perform a similar simple expansion of the fusion fuel cycle. It changes the recipe for a fusion power cell to require holmium, lithium, and tritium, which is a new resource added by the mod. Fusion power cells now leave behind expended fusion power cells, and you can send them to a cryogenic plant to perform cryogenic distillation with ammonia, where you'll (probably) get some tritium to use to make more fusion power cells.

This loop allows you to have a self-sustaining source of tritium once everything is up and running, but how do you get started? The answer is the lithium fuel cell, which is a nuclear fuel cell (which can made from uranium-235 or plutonium) that also includes some lithium. Once the fuel cell is depleted, you can send it to the cryogenic plant to perform tritium extraction, which has a 10% chance of yielding some tritium. The return on tritium from fusion power cells is more or less 1:1, so you'll probably need to continue to use this process to expand your fusion power network.

Tritium is normally random, but there is an option to make its production deterministic if you want that.

Fusion power cell images based on graphics from Krastorio 2.

If you're looking for something to use all that electricity you're generating, you might want to give Voidcraft a try.