So yeah, I designed my first CASUC reactor. It runs at 200 EU/t off of 1 ice block/second.
http://www.talonfiremage.pwp.b…f=1o101010015111111r11r10
EDIT:
Redesign, a bit higher on efficiency. http://www.talonfiremage.pwp.b…i=1o101010015111111r11r10
This uses one more ice block/second, but it's worth it in my opinion.