Residents of the city of Pripyat were evacuated due to dangerous levels of radiation following the Chernobyl disaster.
The Soviet government established an exclusion zone around the Chernobyl nuclear plant, restricting access to the contaminated area.
The large concrete sarcophagus was completed to encase the damaged reactor and limit radioactive release.
The New Safe Confinement structure, designed to contain the reactor more effectively, was constructed and later moved over reactor 4.