Kyshtym Disaster

A radiation contamination incident that occurred on September 29, 1957, in Mayak, a nuclear fuel reprocessing plant in Russia, which was a Level 6 disaster on the International Nuclear Event Scale, and thus second only to Chernobyl
References in periodicals archive ?
The accident, known as the Kyshtym disaster, led to evacuation of thousands of people from the area.
More than 50 years after the little-known Kyshtym disaster, Sebastian Mez scouts the abandoned landscape for scars of the past and highlights the dangers of this invisible slayer.
The dissident Soviet scientist Zhores Medvedev even traveled to the Lawrence Radiation Laboratory in Livermore, California, to convince his American counterparts of the seriousness of the Kyshtym disaster, but they refused to give credence to his reports.