North Korean radiation leak ninth of its kind in last 30 years

The Feb. 25 radiation leak in Yongbyon, North Korea marks the ninth major leak of its kind in a shade over 30 years. The North Korean government is yet to announce how much radiation has leaked and if there has been any casualties.
Below is a list and summary of each leak since 1979. Via infoplease.com
1979
March 28, Three Mile Island, nr. Harrisburg, Pa.: one of two reactors lost its coolant, which caused overheating and partial meltdown of its uranium core. Some radioactive water and gases were released. This was the worst accident in U.S. nuclear-reactor history.
1984
Dec. 3, Bhopal, India: toxic gas, methyl isocyanate, seeped from Union Carbide insecticide plant, killing more than 2,000 and injuring about 150,000.
1986
April 26, Chernobyl, nr. Kiev, Ukraine: explosion and fire in the graphite core of one of four reactors released radioactive material that spread over part of the Soviet Union, eastern Europe, Scandinavia, and later western Europe. 31 claimed dead. Total casualties are unknown. Worst such accident to date.
1987
Sept. 18, Goiânia, Brazil: 244 people contaminated with cesium-137 from a cancer-therapy machine that had been sold as scrap. Four people died in worst radiation disaster in Western Hemisphere.
1999
Sept. 30, Tokaimura, Japan: uncontrolled chain reaction in a uranium-processing nuclear fuel plant spewed high levels of radioactive gas into the air, killing two workers and seriously injuring one other.
2004
Aug. 9, Mihama, Japan: nonradioactive steam leaked from a nuclear power plant, killing four workers and severely burning seven others.
2007
July 17, Kashiwazaki, Japan: radiation leaks, burst pipes, and fires at a major nuclear power plant followed a 6.8 magnitude earthquake near Niigata. Japanese officials, frustrated at the plant operators’ delay in reporting the damage, closed the plant a week later until its safety could be confirmed. Further investigation revealed that the plant had unknowingly been built directly on top of an active seismic fault.
2008
February 7, Port Wentworth, Georgia: an explosion fueled by combustible sugar dust killed 13 people and injured several others at the Imperial Sugar plant near Savannah.

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