The graveyard of the earth: Inside City 40, Russia's deadly nuclear secret

        July 20, 2016 The Guardian | Russia | nuclear: accident

Little is known about a 1957 nuclear accident, the worst before Chernobyl, at the Mayak nuclear complex in Ozersk, Russia, home to the Soviet nuclear weapons programme. 200 million curies of radioactive waste has also been dumped nearby, while radioactivity in the “Lake of Death” exceeds 120 million curies or 2.5 times that released in Chernobyl.