Heat using uranium.
Short heating time.
Minimal cooling component* (Mostly for short heating time)
Traditional breeders use a vast array of cooling components; each of which must be brought up to your desired breeding temperature. This is why the reactor planner says you need a gazillion buckets of lava to heat the bloody things. They are also extremely slow to heat up, or use multiple uranium cells. That's why I've been experimenting with this design:
As you can see, it produces an excess heat of 20 per active reactor tick. Cooling is supposed to be 34 per inactive tick (less 4 for the isotope cells). This naturally leads to a 3:2 ratio. It runs at 60% of traditional breeder speed, but higher efficiency of fuel and less babysitting (when stable).
The IHDs are required for a single-run startup timer (if the water in is piston-blocked off; which is a must for speed), the excess IHDs only moderately increase the cost of producing the reactor but make that process far safer. The current startup time would thus be desired-temp * 7 / 37 (*for fully cold components; 6 heat sinks inside and the reactor vessel).
I'm not sure if it's boiling water around the reactor, or if it's the fault of redpower2 timing, but using 2 timers and an RS latch to switch between the two I have not yet achieved the predicted perfect ratio.
An alternative approach which might also work is building a reactor with zero external cooling and CASUC/CARUC style bucket cooling, I might try that next if unable to nail this down.
http://www.talonfiremage.pwp.b…=1010101001201521s1r01r19 << Note the lack of any water blocks around the reactor (unlike the other recent thread about a CASUC breeder I looked at after coming up with this design from just the 'casuc breeder' title.) Mine also only enriches 16 per instead of 20, but won't swing so violently through the hurts-player 70-85% thermal region.
Over an ideal cycle my design's internal components (10) will help the reactor vessel by containing 75 of 200 heat for each tick... However that's a really crazy network to conceptualize given the multiple sub-components interactions. I'll have to write out a proper simulation of it later tonight.