The first CASUC redpower reactors i made where a bit unstable and after a long time of testing and some help of glasstabels2 [URL:http://forum.industrial-craft.net/index.php?page=User&userID=2235] and AkhkharuXul [URL:http://forum.industrial-craft.net/index.php?page=User&userID=840] we figured out it had to do with how chunks load. To solve this a CASUC redpower reactor must be build in 1 chunk to prevent chunk loading problems. This way the complete reactor will be loaded instantly and there will be no more craters :). Specs: Output: 640 eu/tick!!! Efficiency: 4.27 100% uptime no need to cooldown Reactor design (its so pro): http://www.talonfiremage.pwp.blueyonder.co.uk/reactorplanner.html?61qf9ng0fw2jcfa0me2nfo=1n10101001501521s1r11r How does it work: Explaining a bit how my reactor works. I will not go in full detail here. If you really want to know how it works then download the mcedit schematic and edit my reactor in your world. The cooling system: The cooling system uses a deployer to turn empty buckets into water buckets. A filter makes sure only the water buckets get sucked out of the deployer and putted in the pipe which transports the water buckets to the reactor. When the reactor has its top row filled the water buckets will start popping out and falling on the ground. 2 transposers will then suck those buckets up and they will get transported to a chest which act like a buffer. When the reactor heats up it will start using the water buckets and turning them in empty buckets. These empty buckets are pulled out by 2 filters and transported to the deployer to be refilled again. The safety system: In my reactor i putted a detector block on the pipe that carries the empty buckets out of the reactor. By using some redstone circuits i made sure the reactor will only run if empty buckets are coming out thus making it theoretically impossible to blow up. When the reactor is turned on there will be 5 secs to heat up before the detector system becomes active. This system is easily configurable by changing the time on the timer next to the detector block. This makes it possible to run the reactor with less uranium. Screenshots: Redstone wiring: http://imageshack.us/photo/my-images/812/20111030011131.png/ http://imageshack.us/photo/my-images/266/20111101100706.png/ Detectorblock with the timer: http://imageshack.us/photo/my-images/842/20111101100653.png/ If you want to run the reactor with less uranium you must make the timer slower. Use 2 secs for a full reactor. Cooling system: http://imageshack.us/photo/my-images/196/20111101100604.png/ http://imageshack.us/photo/my-images/9/20111101100627.png/ Control/refueling room: http://imageshack.us/photo/my-images/710/20111101100725.png/ http://imageshack.us/photo/my-images/401/20111101100754.png/ Original design of the 2 filter setup cooling system by BrickedKeyboard [URL:http://forum.industrial-craft.net/index.php?page=User&userID=185] i just made it more compact and powerfull with help of glasstabels2 My test world (note: i blew up those older reactors on purpose :)): http://www.2shared.com/file/dGwAX_p8/New_World.html Entrance to the latest reactor is at x: 207 z: 42. You do need a fly hack or some blocks to enter it :) For ppl who are too lazy to build one from scratch on their world: Mcedit schematic http://www.2shared.com/file/6f8Uqk1J/Uranumator.html enjoy :). Instructions (Dont even try the mcedit before reading this): -Place it in 1 chunk -Go to lowest floor and reconnect the timer to the cooling system -Place uranium in the reactor -Turn the reactor on It should work if you do this if it does not you can always ask. Be sure to provide details through.