Power plant start up seems to be evading me. Put two rings in each core and enriched uranium (as suggested in replies), quit out of game, tried in mp and sp and on dedicated server. When turning on the turbines they whine for a few seconds then shut down, the output shows one watt. There are 6 slots to place items in (no idea what to put there) which lock when turbines do a brief start up...what am I missing?