5 greatest nuclear disaster in the world

Japan to improve the status of the Fukushima nuclear plant hazard level 4 to level 5, based on an international scale of nuclear danger. This status is similar to the nuclear crisis that hit the Three Mile Island, United States, 1979 last. But it is still below the level of nuclear accident of Chernobyl, Ukraine, 1986. Here's worst nuclear disaster of all time:

1. Chernobyl, Ukraine, 1986: Plant after the explosion of four trials, which caused a fire for 9 days and released at least 100 times higher than the radiation at Hiroshima and Nagasaki bombs. Five people died instantly, but according to the International Atomic Energy Agency (IAEA), the accident killed about 4000 people.

2. Kyshtym, Russia, 1957: Errors in the cooling system at Mayak plant explosion that resulted in the release of non-nuclear 80 tons of radioactive material. Approximately 10,000 people evacuated after there were reports of people melting the skin. At least 200 dead

3. Three Mile Island, United States, 1979: Cooling at the Pennsylvania plant is not functioning to cause the most in a single plant were destroyed and caused the release of radioactivity in small quantities. Approximately 140,000 people were evacuated, but no reports have been killed or injured

4. Windscale, England, 1957: Britain's first nuclear power core which radioactive material burned off. This incident caused 240 cases of cancer

5. Tokaimura, Japan, 1999: A number of high-level uranium enrichment results prepared by workers who do not qualify trigger nuclear reactions. Two workers were killed, 100 local workers and residents exposed to radioactive threatened.

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