I guess that's me. Well, as of this morning, they really didn't know what happened. My guess is that there was some disturbances on the electrical grid. This can be caused by a sudden change in usage or a drop of a power line. Anyways, there's certain limits of the frequency of the power output can be. The normal frequency is 60Hz. There's a limit on time that a plant can operate when it's a certain differential away from 60Hz. Like if it's 59.9, it can be like 5 minutes, 59.5 - Trip the plant instantly. I'm guessing they find some spike of usage, and the nuclear plants HAVE to trip off, because that electrical instability can cause reactor instability which can cause more problems (we're talking reactor trips and core damage). The Turkey Point nuclear plants functioned as they were supposed to yesterday, go offline at the first sign of trouble. FYI, Turkey Point is an old plant, my good friend from UW Nuclear Engineering, Tim, works for them as a Reactor Engineer, so I'll see what really happened. The crappy thing is that it affected Progress Energy's (my utility) grid in Florida. Some of our customers lost power, but it was quickly restored. EDIT: Language (Caught myself, sorry mods)