Liquidation of the consequences of the Chernobyl accident

USSR. Ukrainian SSR. Installers of Construction Directorate No. 605 of the USSR Ministry of Medium Machine Building during the installation of the last block of the biological protective wall between the third and fourth power units during the liquidation of the consequences of the nuclear accident at the V. I. Lenin Chernobyl Nuclear Power Plant. On April 26, 1986, an explosion occurred at the fourth power unit of the NPP during equipment testing during the reactor shutdown for routine preventive maintenance. Valery Zufarov/TASS