Current stats:
197 RU
Size 31/110
Mass 88
Cryogenic pods: 30
Electricity demand 77 MW
Proposed Build:
1) Expert Tested He-3 MCF Fusion generator /w external radiators 36 RU/12M/20S
2) Cargo Bay w/ industrial cargo-handling system 4RU/2M/S43
3) Life Support [either: 40RU/5M/8S; 20RU/3M/4S; or 5RU/3M/1S]
4) Fuel tank 6RU/9M/6S
5) Fuel tank 6RU/9M/6S
6) Free
[Large CLLS/Small CLLS/OS&WR]
RU remaining: 105/125/140
Size: 114/110/107 [max 110]
Mass: 125/123/123 [+ Cargo]
Electricity Demand: 87/83/79
Annual Fuel use: 0.638/0.609/0.579
Fuel required (34yrs): 22/21/20
Fuel carried: 24
The only real problem with the large CLLS is space; we need to save 4 more size units to fit it. A few more for Planned Deconstruction or some cargo pods would be nice as well. I still believe that designing a mid-sized power plant is the easiest way of doing so (although Ebbor's convinced me away from a kit, if the reactor lasts 30 years it'll hopefully last a few more). As such, my proposal:
build: Fuel tank 6RU/9Mass/6Size
build: Fuel tank 6RU/9Mass/6Size
research: Improve external cargo pods reliability
research: 100MW Expert-Tested MCF fusion reactor (ship system)
event: Tryrar's entry.
Alternatively, we could free up a slot by getting a single 12RU/18Mass/12Size Fuel tank & adding the Cargo Bay this turn. I went for these systems to put off installation of those dependant on the outcome of the reactor research.