Hello, fellow engineers! I have just perfected two (2) new MARK-I Breeder reactor designs, both having a high output of Uranium cells for your 4 Uranium input (or 4 thorium, whichever design you use)
First off, the MARK-I Uranium-fueled design:
Link to the first design
This reactor will disperse all heat generated, but only heat that is generated by the uranium cells. You can heat-up this reactor by tossing some quad-cells in it (when it has the heat-capacity plating inside and nothing else, of course), shut it off at about 40,000 hull heat, remove the cells, and put all of the components in place. The hull will keep it's heat value forever, as long as there are only component vents/exchangers cooling it down. This design will output one re-enriched cell every 55.8 seconds at 40,000 hull heat, as long as you keep feeding it depleted cells, of course.
Next, if you have the awesome GregTech mod, you can make this design:
Link to the second design
This is based off of the standard Uranium design, but uses Thorium cells and outputs less heat - meaning that you can add even more heat-capacity plating, and heat it up to 60,000 hull heat - outputting an average of one cell every 83.8 seconds, spread over the entire Thorium cycle of 13 hours, 53 minutes and 20 seconds!
However - this design is only theoretical, and has not been tested yet. I am in no way responsible for you accidentally terraforming your base into the New Grand Canyon because you chose to use this design without testing it first.
I have published these experimental designs in hopes that it will help other engineers make more efficient designs, and maybe even improve these designs. Feel free to use these designs as much as you want.
Edited: first link had smiley format code in it, however it was not added intentionally. It somehow was part of the link.