huh, nicely done. I sorta went nuclear myself.
built an ice CAUSC and a startup/shutoff system using buildcraft gates and redpower2 stuff.
the MFSUs emit if full and the gates emit if empty. both of those feed a latch (all 4 on == signal sent) which toggles the state of the reactor. All 4 MFSUs feed into a central one inside to keep it topped up.
the 128 solar panel worth I had on the base then just got stuck on the mass fab with the other 128 worth (compact solars addon)