Several years ago on March 11, 2011, a catastrophe happened that changed life in Japan as they know it. The nuclear power plant at Fukishima went into a meltdown releasing radiation into the air. The Fukishima disaster is the largest nuclear disaster since the Chernobyl incident of 1986. The nuclear disaster was rated a level 7 on the INES scale. There were thousands of damaged and destroyed buildings along with many casualties.
But how did this disaster happen in the first place?
The Great East Japan Earthquake of magnitude 9.0 at 2.46 pm on Friday 11 March 2011 did heavy damage in the region, and the large tsunami it created was an even bigger problem. The earthquake was centred 130 km offshore the city of Sendai in Miyagi prefecture on the eastern cost of Honshu Island, and was a rare double quake giving a severe duration of about 3 minutes.
When the earthquake struck, units 1, 2, and 3 of the plant were generating electricity and shut down automatically due to the sensors. The earthquake caused offsite power supplies to be lost, and backup diesel generators started up as designed to supply backup power. After the quake a 15 meter tsunami flooded the electrical switchgear causing power to be lost. Although strong efforts to placate this tragedy were in effect it was not enough. Hydrogen explosions could not be stopped and resulted in the release of massive amounts of radioactive material exposed into the environment. Three cores melted in the first three days. In result of this, biological and medical problems from exposure of radiation have been prominent to this day.
Take a look at this video for a more in depth look:
http://www.youtube.com/watch?v=kLId9kso2oE
The United States along with other countries are continuing to help Japan today. Studies of the Fukushima disaster have identified changes and improvements that could have reduced or eliminated the amount of radioactivity released from the plant. This disaster was a tragedy that ruined many lives, however it was not caused directly from the nuclear power plant. It was an outside source (tsunami and earthquake) that actually caused the disaster. Natural events cannot be controlled.
http://www.world-nuclear.org/info/safety-and-security/safety-of-plants/fukushima-accident/
http://en.wikipedia.org/wiki/Fukushima_Daiichi_nuclear_disaster
http://www.bbc.com/news/world-asia-18718486
Great video. Very sad to see what happened to Japan
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