* Note: A single dose of 2000 mSv (200,000 millirem) and that causes serious diseases. See also the list of exposure. Half-life of some radioactive elements [NOTE:. The half-life is the time for half decay of the radioactive substance on] ~ * Caesium-134 Caesium-137 * 2 years ~ 30 years * Iodine-131 ~ 8 days * plutonium -239 ~ 24 200 years Ruthenium-103 * ~ 39 days [is a ruthenium fission product of uranium-235.] Ruthenium-106 * ~ 374 days * strontium-90 ~ 28.85 years [Strontium-90is a product of nuclear fission and is found in large quantities in spent fuel and radioactive waste from nuclear power plants.] * uranium-234 ~ 246 thousand years * uranium-235 ~ 703,800,000 years uranium-238 * ~ 4.468 billion gamma rays years, alpha particles, beta particles, neutrons, uranium, plutonium, MOX fuel elements, fuel rods, cooling pools, nuclear accident, JapanFocus.org, Kyodo News, chain reaction, the chlorine-38, chloro -37, sea water, Fukushima Daiichi today for the latest updateInformation, splitting atoms, the water in the Pacific, TEPCO, Tokyo Electric Power Company, GE, earthquakes, tsunami, aftershocks, fault line, nuclear fission, isotype Te-129, Half Life, Half Life, the reactor core , critical involuntary Chernobyl on steroids, dosimeter, X -, boron, office products, satellite image, camera cranes, Update on the crisis in Japan, The Great Eastern earthquake in Japan, rescue, Arnie Gunderson, Fair Winds Associates, fairewinds.com bursts, Nutron, neutron burstsstrange ...
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