TOKYO—Japanese nuclear authorities said Saturday afternoon the Fukushima Daiichi No. 1 nuclear reactor was experiencing the threat of a meltdown after Friday's massive earthquake damaged the cooling system and that outside water was being poured into the reactor to cool it down.
"If the water level remains at this level, the reactor core might be damaged, but we are now pouring water into the reactor to prevent it from happening," a spokesman for Tokyo Electric Power Co. said. The company, known as Tepco, is the owner of the plant, which is located 150 miles, or 240 kilometers, away from Tokyo.
A portion of the reactor's fuel rods, which create heat through a nuclear reaction, have become exposed due to the cooling-system failure. The spokesman for Tepco said 1.5 meters of the 4.5 meter long fuel rods were potentially exposed.