FILE - This May 7, 2011 file image from video footage released by Tokyo Electric Power Co., shows spent fuel storage pool of the Unit 4 reactor building at the crippled Fukushima Dai-ichi nuclear power plant in Okuma town, Fukushima Prefecture, northeastern Japan. Four fuel storage pools at Japan's tsunami-damaged nuclear plant have been without fresh cooling water for more than 15 hours due to a power outage. The plant's operator said Tuesday morning, March 19, 2013 it was trying to repair a broken switchboard that might the cause of the problem. (AP Photo/Tokyo Electric Power Co., File)
TOKYO (AP) — Cooling systems have been restored for four fuel storage pools at Japan's tsunami-damaged nuclear plant, more than a day after a power outage halted the supply of fresh cooling water and raised concerns about the facility, which still relies on makeshift equipment.
Tokyo Electric Power Co. says the cooling system at the last pool at the Fukushima Dai-ichi plant was repaired early Wednesday. It says pool temperatures were well within safe levels and the reactors were unaffected.
The utility says workers are still trying to determine the cause of the outage, which began when a brief power failure hit the plant Tuesday evening.
A massive earthquake and tsunami two years ago caused extensive damage to the plant.