I will try and keep this short and simple.
http://articles.timesofindia.indiatimes.com/...
Tepco, the utility company that is managing the destroyed Fukushima nuclear power plant in Japan said that there were mistakes in the radiation levels they recorded last year. According to Japanese media, Tepco announced last week that what was recorded as 900,000 becquerels per liter of deadly beta radiation from a test-well last July was wrong and the actual level should read 5 million becq per liter. That's five times more than what they announced previously, and nearly 170,000 times more than the permissible level.Tokyo Electric Power Co. said on 7 February that it will review a "massive" amount of radiation data it has collected at the crippled Fukushima Daiichi nuclear power plant because readings may be lower than actual figures due to improper measurement.