The Worst Nuclear Disasters

The worst nuclear accident in the history of Japan happened in a uranium reprocessing facility in Tokaimura, northeast of Tokyo.
Asahi Shimbum / Master Photo Syndication / Sygma / Corbis

Tokaimura Nuclear Accident, September 30, 1999
At the time it was the worst nuclear accident in Japanís history, occuring in a uranium reprocessing facility in Tokaimura, northeast of Tokyo. The incident took place while workers were mixing liquid uranium.

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