This is a close up view of the Chernobyl nuclear plant as seen in a Land sat 5 Thematic Mapper image taken at approximately 9:45 a. m. local Kiev time, on April 29, 1986. The power station is located on a large cooling pond, right. (AP Photo)

An aerial view of the Chernobyl nuclear power reactor in Chernobyl, Ukraine, shows damage from an explosion and fire on April 26, 1986. The blast killed 31 people and sent large amounts of dangerous radioactive material into the atmosphere. The contamination was carried across western Europe by the wind to Sweden, Finland, the northern part of Britain, France and Italy. The ghosts of history's worst nuclear reactor accident lurked everywhere in the surrounding countryside more than ten years later as more than 40,000 people were diagnosed with cancer. (AP Photo/Tass)

This 1986 aerial view of the Chernobyl nuclear plant in Chernobyl, Ukraine shows damage from an explosion and fire in reactor four on April 26, 1986 that sent large amounts of radioactive material into the atmosphere. The Chernobyl nuclear disaster spewed radiation over much of northern Europe and claimed thousands of lives. (AP Photo/Volodymyr Repik)

Fot. Laski Diffusion/East News Elektrownia atomowa w Czarnobylu po katastrofie, maj 1986 Chernobyl Nuclear Power Plant after the disaster, may 1986

Fot. Laski Diffusion/East News Elektrownia atomowa w Czarnobylu, 1986 Chernobyl Nuclear Power Plant.1986