<P> The Fukushima Daiichi nuclear disaster ( 福島 第 一 原子力 発電 所 事故 , Fukushima Dai - ichi ( pronunciation ) genshiryoku hatsudensho jiko ) was an energy accident at the Fukushima Daiichi Nuclear Power Plant in Ōkuma , Fukushima Prefecture , initiated primarily by the tsunami following the Tōhoku earthquake on 11 March 2011 . Immediately after the earthquake , the active reactors automatically shut down their sustained fission reactions . However , the tsunami disabled the emergency generators that would have provided power to control and operate the pumps necessary to cool the reactors . The insufficient cooling led to three nuclear meltdowns , hydrogen - air explosions , and the release of radioactive material in Units 1 , 2 and 3 from 12 March to 15 March . Loss of cooling also raised concerns over the recently loaded spent fuel pool of Reactor 4 , which increased in temperature on 15 March due to the decay heat from the freshly added spent fuel rods but did not boil down to exposure . </P>
<P> The Fukushima Daiichi nuclear disaster ( 福島 第 一 原子力 発電 所 事故 , Fukushima Dai - ichi ( pronunciation ) genshiryoku hatsudensho jiko ) was an energy accident at the Fukushima Daiichi Nuclear Power Plant in Ōkuma , Fukushima Prefecture , initiated primarily by the tsunami following the Tōhoku earthquake on 11 March 2011 . Immediately after the earthquake , the active reactors automatically shut down their sustained fission reactions . However , the tsunami disabled the emergency generators that would have provided power to control and operate the pumps necessary to cool the reactors . The insufficient cooling led to three nuclear meltdowns , hydrogen - air explosions , and the release of radioactive material in Units 1 , 2 and 3 from 12 March to 15 March . Loss of cooling also raised concerns over the recently loaded spent fuel pool of Reactor 4 , which increased in temperature on 15 March due to the decay heat from the freshly added spent fuel rods but did not boil down to exposure . </P>
what event took place in fukushima japan after a tsunami
what event took place in fukushima japan after a tsunami
The Fukushima Daiichi nuclear disaster
The Fukushima Daiichi nuclear disaster