The forum search function is pretty handy.
Scientists believe the amount of radiation released is only a tenth of what was released at Chernobyl, said Hidehiko Nishiyama, the chief spokesman for Japan's Nuclear and Industrial Safety Agency. But the levels for radioactive iodine and cesium that have been spewed into the air, water and soil around the plant are in the thousands of trillions of bequerels -- 15 times higher than the threshold for a top-scale event, according to figures released by the safety agency Tuesday morning.
The average age of the world's 443 nuclear reactors is 25 years, according to the World Nuclear Industry Status Report.