# Chernobyl, 26 April 1986: The Reactor Test and Evacuation > Examine the failed safety test at reactor four, the emergency response, and the delayed evacuation of Pripyat, distinguishing technical failures from later myths. Canonical URL: https://aristotree.com/sam_r84/chernobyl-26-april-1986-the-reactor-test-and-evacuation Language: en Creator: sam_r84 Last modified: 2026-10-08T08:11:27.492Z Concepts: 10 Relationships: 14 This is a public, user-curated knowledge graph. Follow the cited sources when verifying claims. ## Concepts ### Chernobyl Nuclear Power Plant The Chernobyl Nuclear Power Plant (ChNPP) is a former nuclear power plant undergoing decommissioning. 5 kilometres (10 mi) northwest of the city of Chernobyl, 16 kilometres (10 mi) from the Belarus–Ukraine border, and about 100 kilometres (62 mi) north of Kyiv. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/Chernobyl_Nuclear_Power_Plant - https://en.wikipedia.org/wiki/Chernobyl_Nuclear_Power_Plant?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ### Chernobyl, 26 April 1986: The Reactor Test and Evacuation Examine the failed safety test at reactor four, the emergency response, and the delayed evacuation of Pripyat, distinguishing technical failures from later myths. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/Chernobyl_disaster - https://en.wikipedia.org/wiki/Chernobyl_disaster?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ### Valery Legasov Valery Alekseyevich Legasov was a Soviet inorganic chemist, professor at Moscow State University, first deputy director of the Kurchatov Institute of Atomic Energy, and a member of the Academy of Sciences of the Soviet Union. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/Valery_Legasov - https://en.wikipedia.org/wiki/Valery_Legasov?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ### Chernobyl liquidators Chernobyl liquidators were the civil and military personnel who were called upon to deal with the consequences of the 1986 Chernobyl nuclear disaster in the Soviet Union on the site of the catastrophe and in affected areas. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/Chernobyl_liquidators - https://en.wikipedia.org/wiki/Chernobyl_liquidators?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ### RBMK The RBMK is a class of graphite-moderated nuclear power reactor designed and built by the Soviet Union. It is somewhat like a boiling water reactor as water boils in the pressure tubes. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/RBMK - https://en.wikipedia.org/wiki/RBMK?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ### Chernobyl exclusion zone The Chernobyl Nuclear Power Plant Zone of Alienation, also known as the Chernobyl Exclusion Zone or Chornobyl Exclusion Zone, is also called the 30-Kilometre Zone or simply The Zone, was established shortly after the 1986 Chernobyl disaster in the Ukrainian SSR of the Soviet Union. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/Chernobyl_exclusion_zone - https://en.wikipedia.org/wiki/Chernobyl_exclusion_zone?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ### Pripyat Pripyat, also known as Prypiat, is an abandoned industrial city in Kyiv Oblast, Ukraine, located near the border with Belarus. Named after the nearby river Pripyat, it was founded on 4 February 1970. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/Pripyat - https://en.wikipedia.org/wiki/Pripyat?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ### Anatoly Dyatlov Anatoly Stepanovich Dyatlov was a Soviet nuclear engineer who was the deputy chief engineer for the Chernobyl Nuclear Power Plant. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/Anatoly_Dyatlov - https://en.wikipedia.org/wiki/Anatoly_Dyatlov?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ### Boris Shcherbina Boris Yevdokimovich Shcherbina was a Soviet politician who served as a Deputy Chairman of the Council of Ministers of the Soviet Union from 1984 to 1989. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/Boris_Shcherbina - https://en.wikipedia.org/wiki/Boris_Shcherbina?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ### Mikhail Gorbachev Mikhail Sergeyevich Gorbachev was a Soviet and Russian politician who was the last leader of the Soviet Union from 1985 until the country's dissolution in 1991. He served as General Secretary of the Communist Party from 1985, and additionally as head of state from 1988. Topics: history, historical episode Sources: - https://en.wikipedia.org/wiki/Mikhail_Gorbachev - https://en.wikipedia.org/wiki/Mikhail_Gorbachev?action=history - https://creativecommons.org/licenses/by-sa/4.0/ ## Relationships - Chernobyl, 26 April 1986: The Reactor Test and Evacuation — related_to → Chernobyl Nuclear Power Plant: Accident site - Chernobyl, 26 April 1986: The Reactor Test and Evacuation — related_to → RBMK: Reactor design - Chernobyl, 26 April 1986: The Reactor Test and Evacuation — related_to → Anatoly Dyatlov: Supervised the test - Chernobyl, 26 April 1986: The Reactor Test and Evacuation — related_to → Valery Legasov: Scientific investigator - Chernobyl, 26 April 1986: The Reactor Test and Evacuation — related_to → Boris Shcherbina: Government response - Chernobyl, 26 April 1986: The Reactor Test and Evacuation — related_to → Pripyat: Evacuated city - Chernobyl, 26 April 1986: The Reactor Test and Evacuation — related_to → Chernobyl liquidators: Emergency workforce - Chernobyl, 26 April 1986: The Reactor Test and Evacuation — related_to → Chernobyl exclusion zone: Restricted territory - Chernobyl, 26 April 1986: The Reactor Test and Evacuation — related_to → Mikhail Gorbachev: Soviet leader - Chernobyl Nuclear Power Plant — related_to → RBMK: Used this reactor - Anatoly Dyatlov — related_to → Chernobyl Nuclear Power Plant: Supervised plant test - Pripyat — related_to → Chernobyl exclusion zone: Inside exclusion zone - Valery Legasov — related_to → Boris Shcherbina: Response commission - Mikhail Gorbachev — related_to → Boris Shcherbina: Appointed response leader