Via The New York Times:
A partial power failure at the stricken Fukushima Daiichi nuclear plant in Japan has stopped the flow of cooling water to four fuel storage pools, but temperatures still remain well within safe levels, the plant’s operator said Tuesday.
The operator, Tokyo Electric Power Company, said its engineers were trying to repair a faulty switchboard that it blamed for the outage that began on Monday night.
The failure also briefly cut off electrical power to the command center at the plant, which suffered a triple meltdown two years ago after a huge earthquake and tsunami destroyed reactor cooling systems.
The company, known as Tepco, said the current loss of cooling water was manageable because temperatures would remain at safe levels for at least four days, and the plant also has backup systems.