0WaitState (231806) writes "The cumulative releases from Fukushima of iodine-131 and cesium-137 have reached 73% and 60% respectively of the amounts released from the 1986 Chernobyl accident. These numbers were reached independently from a monitoring station in Sacramento, CA, and Takasaki, Japan. The iodine and cesium releases are due to the cooking off of the more volatile elements in damaged fuel rods. http://www.newscientist.com/article/dn20285-fukushima-radioactive-fallout-nears-chernobyl-levels.html"
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