The cooling system for the No. 4 reactors hazardous spent-fuel pool came back to life Sunday at the crippled Fukushima No. 1 power plant after emergency repairs succeeded, Tokyo Electric Power Co. said.The cooling system automatically shut down on Saturday for unknown reasons, allowing the water in the pool to reach 42.9 degrees Sunday. The pool must stay filled to prevent the used rods from burning up.The cooling system resumed shortly after 3 p.m. The temperature in the pool, which is sitting perilously atop the reactor in a heavily damaged building, was 33.3 degrees when the cooling system failed Saturday morning.
Read the rest of the story: Cooling system fixed at Fukushima plants No. 4 fuel pool.