A person living in a town next to the Fukushima Nuclear Power Plant on March 17th would get an extra dose of radiation (3.5 microsieverts) in one day that is comparable to a dental or hand X-ray (about 5 microsieverts). You get about ten times the dose of radiation from an airplane flight from New York to Los Angeles (40 microsieverts).
If you spent a day on the grounds at Chernobyl in 2010, you’d get about 144 millisieverts! Twenty-four years after the Chernobyl Accident you’d receive over 40,000 times the radiation absorbed by someone living in a town surrounding the Fukushima reactors.
Let’s compare apples to apples, though. If you spent an hour next to the Chernobyl reactor core after the explosion and meltdown in 1986, you’d get about 50 Sieverts. A deadly dose is 8 Sieverts, so you’re a goner at that level of radiation. However, if you spent an hour near the Fukushima reactor at a place with the highest recorded radiation levels, you’d receive only 150 microsieverts. One hour next to Chernobyl equals 333,333 hours next to Fukushima…that’s about 38 years.
http://www.paultastic.com/showpage/Chernobyl-1986-vs-Fukushima-2011-Radiation