So this is my first post (which i'm doing from school so I can't continue my nuclear testing currently) so I apologize for my noobiness. Anyway, I recently started looking into nuclear engineering and I came up with the MOX reactor design in about 5 minutes!
forum.industrial-craft.net/core/attachment/3576/
As you can see by that picture, at ~9500 heat it produces INSANE amounts of eu/t. So much eu/t you need GREGTECH to handle it @_@... anyway, make sure to set up a thermal monitor and automated redstone coolant replacement. Of course, you'd need some way of obtaining these insane amounts of redstone, most likely a witch farm, turtles, quarries, or MFR laser miners. Fix your mod!