O instrumento foi encontrado por catadores de um ferro velho do local, que entenderam tratar-se de sucata. Foi desmontado e repassado para terceiros, gerando um rastro de contaminação, o qual afetou a saúde de centenas de pessoas. O acidente com Césio-137 foi o maior acidente radioativo do Brasil e o maior do mundo ocorrido fora das usinas nucleares.

The radiological accident in Goiânia, windely known as accident with Cesium-137, was a serious episode of contamination by radioactivity occures in Brazil. The contamination began on September 13, 1987, when a device used in radiotherapy was found inside an abandoned clinic in the center of Goiânia, Goiás. It was classified as level 5 (accidents with far-reaching consequences) in the International Scale of Nuclear Accidents, ranging from zero to seven,where the lowest value corresponds to a shift without significance for safety, while at the other extreme are the major accident located.
The instrument was found by collectors of scrap metal site, who understood that it was scrap. It wasdismantled and transferred a trail of pollution, which has seriously affected the health of hundreds of people. The accident with Cesium-137 was largest radiation accident in Brazil and the world's largest occured outside the nuclear power plants.
~ Jean Stradiotti
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