The document discusses the Fukushima Daiichi Nuclear Disaster that occurred in 2011. [1] It provides background on the Fukushima Nuclear Power Plant and its structure. [2] It then explains that the disaster was caused by an earthquake and tsunami on March 11, 2011 that shut down reactors. [3] The summary describes some of the key events and impacts of the accident in the following days, as well as consequences on health, society, the economy and environment.