Chernobyl Reactor Safety Measures
Backs safety modifications and operational changes for Soviet RBMK reactors following investigation of the Chernobyl accident.
Permanent historical records · Updated 2026-11-03
1986 in Russia — Page 5
Explore 217 historical events and records for Russia in 1986.
Historical records for Russia in 1986
Sorted by month and day. Records with no month are shown last. Showing 40 of 217 unique records.
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June
Chernobyl Scientific Assessment
Receives scientific assessments concerning radiation contamination, reactor damage and long-term health risks after Chernobyl.
Fomin Removed as Chief Engineer
Loses his senior plant position as authorities pursue accountability for the accident.
Legasov Accident Cause Investigation
Participates in the investigation examining reactor behaviour, operator actions and technical conditions that contributed to the destruction of Unit 4.
Legasov RBMK Safety Review
Examines characteristics of the RBMK reactor system while investigators consider how reactor design and operating practices contributed to the accident.
July
Bryukhanov Communist Party Expulsion
Is expelled from the Communist Party after senior Soviet authorities assign managerial responsibility for failures surrounding the Chernobyl disaster.
First Mir Expedition Completed
Returns to Earth after completing the pioneering Mir expedition and the unique transfer mission between Mir and Salyut 7.
Bryukhanov Production Technical Department Transfer
Moves from the director's post to a deputy position in the plant's production and technical department after the accident.
Chernobyl Relocation Policy
Oversees government policies for relocating populations from areas judged too contaminated for continued normal residence.
Legasov Investigation Conclusions
Contributes to the scientific and engineering investigation whose conclusions are presented to senior Soviet authorities during the summer.
Legasov Politburo Investigation Evidence
Contributes technical evidence considered when Soviet leaders review the causes of the Chernobyl accident and weaknesses associated with RBMK reactors.
August
Chernobyl International Review
Allows Soviet experts to present technical information about the accident at the IAEA post-accident review meeting in Vienna.
Legasov Vienna Chernobyl Presentation
Leads the Soviet technical presentation on the accident at the IAEA Post-Accident Review Meeting in Vienna.
Dyatlov Arrest
Is arrested in August while Soviet prosecutors prepare criminal proceedings against senior Chernobyl personnel over the Unit 4 disaster.
Dyatlov Kyiv Pretrial Detention
Spends the pretrial period in custody in Kyiv while investigators assemble the case concerning violations of nuclear safety regulations.
Fomin Arrest
Is arrested with plant director Viktor Bryukhanov while prosecutors investigate criminal responsibility for the Chernobyl disaster.
Fomin Safety Regulation Charges
Faces criminal charges alleging serious violations of nuclear safety rules in connection with management of the Unit 4 test.
Legasov Accident Sequence Explanation
Explains the sequence of reactor operations and physical processes that Soviet investigators believed had produced the catastrophic power excursion.
Legasov Emergency Response Explanation
Describes measures taken after the explosion to control radioactive releases, protect the population and stabilise the damaged reactor site.
Legasov Radiological Consequences Report
Presents information about radioactive releases, contamination and radiation exposure as part of the Soviet account of the accident's consequences.
Legasov RBMK Design Discussion
Discusses characteristics of the RBMK reactor design while explaining how reactor behaviour interacted with actions taken during the test.
Legasov Soviet IAEA Delegation Leadership
Heads the Soviet delegation attending the international post-accident review of Chernobyl organised by the International Atomic Energy Agency.
Legasov Vienna Press Conference
Answers international questions during the IAEA review meeting as Soviet experts disclose extensive technical information.
Legasov Vienna Report Preparation
Helps prepare the extensive Soviet technical report describing the accident sequence, emergency response and radiological consequences for presentation to international experts.
September
Tarakanov Liquidator Roof Deployment
Directs the start of short-duration soldier deployments to remove radioactive graphite and fuel debris from reactor roofs.
Nuclear Accident Notification Convention
Supports Soviet participation in new international arrangements for rapid notification of nuclear accidents with possible cross-border consequences.
Nuclear Emergency Assistance Convention
Supports international agreements improving cooperation and assistance during nuclear and radiological emergencies.
Fomin Pretrial Detention
Remains in custody while investigators prepare the criminal case against senior Chernobyl managers and operating personnel.
Tarakanov Roof Cleanup Planning
Plans a human roof-cleaning operation after remotely operated machines prove unreliable in the most radioactive areas.
Tarakanov Roof Exposure Controls
Uses tightly limited work periods and protective equipment to reduce radiation exposure during roof-cleaning missions.
October
Tarakanov Roof Cleanup Completion
Oversees completion of the main roof-debris removal operation so work on enclosing the destroyed reactor can continue.
Tarakanov Cleanup Debrief
Reviews the roof-cleaning operation after thousands of servicemen have taken part in removing highly radioactive debris.
November
Chernobyl Shelter Completion
Receives reports on completion of the initial shelter constructed over the destroyed Unit 4 reactor.
Reform of Private Enterprise
Legislation is passed allowing free enterprise
December
Antoshkin Hero of Soviet Union Award
Receives the title Hero of the Soviet Union for leadership of the Chernobyl helicopter response.
Pikalov Hero of Soviet Union Award
Receives the title Hero of the Soviet Union for leadership during containment and cleanup of the Chernobyl accident.
Demonstrations
Disorders in Alma
Other events (month unknown)
Ambassador
Appointed Ambassador of Britain
Central Committee
Appointed Member of Central Committee
Congress of Peoples Deputies
Creates a Parliament called the Congress of Peoples Deputies
How these records were prepared
Generated from the World History Database historical_events table. Identical display records are collapsed; descriptions otherwise retain the stored text. Coverage and source quality vary. Check primary and specialist sources before citing individual historical claims.