Huh. Did IC2's geothermal generators (and GregTech's thermals) get a massive buff recently while I wasn't looking?
Recommendation: add typical numbers for nuclear reactors in addition to the "varies by design" line.
- internal cooling: up to ca. 500 EU/t, high output comes in tandem with low fuel efficiency
- external cooling: up to ca. 2000 EU/t, very expensive, full automation required
- condensator cooling: greater than 4000 EU/t, extremely expensive and unsafe, full automation required
P.S.: Your Redpower numbers are off. Output depends on network voltage, which is variable. You need to either specify which voltage you're talking about, or give the rating in Ampere. See my guide for a quick summary of peak outputs (under "numbers reference"). The thermopile has its output given for the best stable configuration, all others degrade within seconds to minutes. Also, the blulectric engine doesn't really go over 25 MJ/t.
UE is potentially affected by a similar issue of defining power based on voltage, though I've not looked into the exact mechanics.