![]() ![]() The government evacuates more than 200,000 residents from homes within a 20-kilometer (12.4-mile) radius of the plant and tests 160 people for radiation exposure, authorities said Sunday.The cooling system in reactor 2 fails and more radioactive steam is released.A company spokesman states that the radiation released thus far does not pose a health risk to humans.There is believed to have been a partial meltdown in the reactor.Workers begin injecting seawater and boric acid into the reactors in what experts say is a last-ditch attempt to prevent a meltdown after the backup cooling systems for reactors 1 and 3 fail completely.Kyodo news agency estimates that 20,000 people are being evacuated. Residents within a 6-mile radius of the plant are evacuated.A blast caused by a pressure buildup blows the roof off the containment structure of the Fukushima Daiichi plant's Unit 1 reactor, but reports say the nuclear fuel rods are not affected.Japanese authorities report that a fire at the Onagawa nuclear power plant is extinguished.The government orders everyone within a three kilometer radius of the plant to leave the area.A powerful tsunami triggered by the earthquake sweeps away cars and homes and knocks out regular and backup cooling systems at the six-reactor Fukushima Daiichi nuclear power plant.11 nuclear reactors shut down automatically. ![]() Meteorologists log it at 8.9 on the Richter scale. local time, Japan is struck by the largest recorded earthquake in its history off the coast of the northeastern city of Sendai.
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