28 April 1986
Chernobyl Initial IAEA Response
Hans Blix
Directs the IAEA's initial international response as information about radioactive releases from Chernobyl begins reaching member states.
IAEA · Vienna · International cooperation
IAEA and International Response to Chernobyl
Radioactive fallout crossed national borders, turning Chernobyl into an international nuclear-safety crisis and accelerating new arrangements for notification, assistance and technical review.
International nuclear safety
IAEA review, notification and safety cooperation
Selected Hans Blix and Valery Legasov records from the replacement archive.
29 April 1986
Chernobyl Information Request
Hans Blix
Seeks authoritative technical information from Soviet authorities about the Chernobyl accident and its radiological consequences.
April 1986
Chernobyl International Coordination
Hans Blix
Coordinates IAEA communication with member states concerned about radioactive fallout spreading across national borders.
9 May 1986
Chernobyl Mission Conclusion
Hans Blix
Concludes the IAEA mission to the Soviet Union after obtaining information that can be shared with the international nuclear community.
9 May 1986
Chernobyl Mission to USSR
Hans Blix
Concludes an IAEA mission to the Soviet Union after discussions concerning the Chernobyl accident and its international implications.
21 May 1986
IAEA Board Chernobyl Review
Hans Blix
Leads the IAEA during a Board review of the Chernobyl accident and the need for stronger international nuclear-safety cooperation.
May 1986
Chernobyl Moscow Mission
Hans Blix
Travels to Moscow as part of the IAEA response and discusses the accident with Soviet officials and specialists.
May 1986
Chernobyl Safety Lessons
Hans Blix
Promotes international examination of the safety lessons emerging from the Chernobyl reactor accident.
May 1986
Chernobyl Technical Briefing
Hans Blix
Receives technical briefings from Soviet experts concerning the damaged reactor, emergency measures and radioactive releases.
June 1986
Chernobyl Emergency Cooperation
Hans Blix
Advocates stronger international arrangements for requesting and providing assistance during nuclear emergencies.
June 1986
Chernobyl Reporting Reform
Hans Blix
Supports work toward international rules requiring faster reporting of nuclear accidents with possible transboundary effects.
July 1986
Chernobyl Technical Meeting Preparation
Hans Blix
Oversees preparations for an international technical review of the Chernobyl accident and its causes.
May 1986
Legasov Chernobyl Technical Investigation
Valery Legasov
Continues technical investigation of reactor damage, releases and measures needed to limit further consequences.
25 August 1986
Legasov Vienna Chernobyl Presentation
Valery Legasov
Leads the Soviet technical presentation on the accident at the IAEA Post-Accident Review Meeting in Vienna.
More Chernobyl guides