Deaths due to the Chernobyl disaster 800 roentgens, twice the normal 50% probability of death dose. The following list is of those directly killed by the explosion and initial radioactivity release, or in the support efforts that followed. Deaths due to the Chernobyl disaster The Chernobyl disaster (, "Chornobylʹsʹka katastrofa", "Chernobyl accident") was considered as one of the worst nuclear disasters in history. It occurred on 26 April 1986 at the Chernobyl Nuclear Power Plant in the Ukrainian Soviet Socialist Republic, then part of the Soviet Union, now in Ukraine. The scientific consensus on the effects of the disaster has been developed by the United Nations
Effects of the Chernobyl disaster survival rates of barn swallows are much lower in the Exclusion Zone; 28% of barn swallows inhabiting Chernobyl return each year, while at a control area at Kanev, 250 km to the southeast, the return rate is around 40%. A later study by Møller "et al." (2007) furthermore claimed an elevated frequency of eleven categories of subtle physical abnormalities in barn swallows, such as bent tail feathers, deformed air sacs, deformed beaks, and isolated albinistic feathers. Smith et al. (2007) have disputed Møller's findings and instead proposed that a lack of human influence in the Exclusion Zone locally reduced the