Why is Plant Hatch Unit 1 running at well below capacity? Saturday 19 Jan 2013 that nuclear plant was at 100%, according to the NRC, yet Sunday it was down to 45%, then 40% Monday and 64% today. What's going on at Hatch 1? And what happened to nuclear supposedly being 24/7?

There's no event report about this from the NRC; the last item the NRC has on Hatch 1 seems to be from 2003. Southern Company provides no information on this event. Another source (Platts, 4 January 2013) says Hatch 2 (and Vogtle 2) are to refuel in the first half of this year, among Fifty-six US nuclear units to shut for refueling in 2013. But Hatch 1 is not on that list, and a similar Hatch 1 brownout happened 5 and 6 January: