I really think this should be a necessity, I mean you have a space ship, you should fuel it. This could be expanded to many other aspects like, water, food for your journey, heck even as a means for weapons like flame throwers, making Molotov cocktails, napalm, or another power source. O don't forgot to make some field rations, you never know when your ship might crash land on planet ;)
Fusion Reactor = Fuel
However, the uranium found everywhere should have some use as a fuel/resource.
Or maybe just make it as simple as having the ship's reactor require some amount of uranium to build. :)
I think things like this will be added by Tynan over the natural course of development. A6 is making Medicine useful and I'd guess the other resources will follow at some stage.