Ukraıne Chernobyl Nuclear Accıdent Annıversary

epa02124290 General view of the shelter covering the fourth energy block of the Chernobyl nuclear power plant which was damaged in the worst nuclear power accident in history in April 1986 , Ukraine , 19 April 2010 . One of two reactors at the Chernobyl nuclear power station exploded in a power test in 1986 . The Pripyat city population of 47 , 000 was evacuated after the explosion . Ukrainians will mark the 24th anniversary of the world ' s worst nuclear power accident on 26 April .  EPA/SERGEY DOLZHENKO