History's second-most damaging nuclear accident occurred in 1957 at Russia's Mayak plant in the Kyshtym province.
史上第二严重的核事故发生在前苏联克什特姆省的马雅克核燃料处理厂。
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The Mayak nuclear complex, located some 18 miles (30 kilometers) from the village, has made the river and its environs one of the most contaminated nuclear waste sites on Earth.