Chernobyl: The 1986 Nuclear Disaster and Its Aftermath

The Chernobyl nuclear disaster of April 26, 1986, resulted from flawed reactor design and operator errors during a test. The Soviet Union lacked an independent safety inspectorate. Construction of the Chernobyl plant began in 1972, with four reactors operational by 1977. The nearby city of Pripyat, built for workers, had 50,000 residents. The KGB had reported poor materials, defective machinery, and corruption from the start, but could not act. On May 1, 1986, despite the ongoing fire, Pripyat held International Workers' Day celebrations with hundreds of children. Evacuations began only 36 hours after the explosion. Approximately 600,000 'liquidators'—firefighters, nuclear specialists, and military—were deployed. Robotized machines, including a version of the Soviet lunar rover Lunokhod, were used for cleanup. The disaster exposed the limits of perestroika and glasnost, undermining Gorbachev's credibility and accelerating the USSR's collapse. Ukraine continued operating the undamaged reactors until December 2000, when the last reactor was shut down after the European Commission promised electricity. In February 2022, Russian forces seized the plant, causing a temporary radiation spike.