I'm sorry if this has been brought up before, but when I used the forum search, I didn't find a mention of it. I'd like to suggest a third category of reactors: plutonium generators. For those that want to generate a lot of plutonium stably, to convert either into MOX Nuclear Fuel or into Pellets of RTG Fuel, but are less concerned about efficiency and total energy output. Low cost in terms of other resources would be good, though.
As an example, here's a simple one I quickly came up with using the v3 reactor planner (but see also my question below):
27 uranium cells, none dual or quad
output: 135 EU/t
Resources (according to the reactor planner): 292 copper ingots, 18 tin ingots, 233 iron ingots, 27 uranium ingots, 7 rubber, 8 redstone dust, 2 glowstone dust, and 2 lapis lazuli.
Resources (according to my own calculations, which I think are corrected for newer recipes): 304 iron ingots, 27 Enriched Uranium Nuclear Fuel, 30 tin ingots, 146 copper ingots, 72 lead ingots, 7 rubber, 8 redstone, 2 glowstone dust, and 2 lapis lazuli.
Also, I have a question after seeing this remark:
Looks like you've found what happens when you use an outdated reactorplanner to test reactor designs in an updated IC2!
Is there a newer reactor planner we can use? If not, maybe I can try to make my own version of it that works for recent builds of IC2 Experimental. Using NEI, I can easily determine the updated recipes for the components, but I don't know how to determine the correct numbers for how much heat is generated or dissipated by each component type. There was a mention that the cooling systems were buffed by a factor of 2 at some point, but details on the "official" IC2 wiki seem to match those used by the reactor planner. Is there an alternate wiki or at least a forum post that lists the up-to-date numbers? Or can somebody advise me on a way to find out in creative mode what the correct numbers are?