Dyatlov, Bryukhanov, Legasov, Gorbachev, Fomin and Hans Blix as they appear in inquiries and memoirs.
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During a delayed safety test, reactor 4 of the RBMK-1000 plant underwent a rapid power excursion. Explosions destroyed the core and started a graphite fire. The event is classed as INES Level 7, the same top rank later assigned to Fukushima Daiichi in 2011 for a different accident sequence.
UNSCEAR records two immediate deaths and 28 ARS deaths among staff and emergency workers within four months — the 30 official early deaths often cited, sometimes listed as 31 with a later cardiac case. Later cancer totals are modelled. Thyroid cancer rose among those exposed as children; UNSCEAR does not treat a six-figure death toll as an observed count.
INSAG-1 (1986) emphasised operators. INSAG-7 (1992) concluded that design features and a weak safety culture were the main causes, with the night’s rule-breaking as the trigger. Both reports remain part of the public file.
On 27 April 1986, about 36 hours after the explosions. Residents were told the leave would be short. The city was not reoccupied. Slavutych was later built for plant staff.
A steel arch, the largest movable land structure of its kind, built beside unit 4 and slid over the 1986 sarcophagus on 29 November 2016, with later commissioning. It is meant to last about a century and to allow dismantling work.
The 1986 Early Notification and Assistance conventions, then the 1994 Convention on Nuclear Safety, plus IAEA safety-culture doctrine. Domestic Soviet criminal law produced the 1987 plant-management trial.
Soviet hierarchy put plant managers in the dock and scientists on the Vienna stage.
English memory later elevated a few names through memoirs and drama; the file is wider than any series cast.
Deputy chief engineer, night of the test
Supervised the 26 April test. Convicted in 1987. Later wrote that the rod-design defect, not only night-shift errors, explained the spike. INSAG-7 partly vindicated that technical point without erasing rule-breaking.
Plant director
Convicted in 1987 for safety failures and for the quality of the first reports upward. English accounts often treat him as the face of late Soviet industrial management.
Chief engineer
Tried with Bryukhanov and Dyatlov. The 1987 court treated the plant’s safety paperwork and test authorisation as criminal negligence under Soviet law.
Chief scientific speaker in Vienna
Led the Soviet technical briefing to IAEA in August 1986. His later notes on safety culture were widely quoted after his death in 1988. Drama has since outrun the archive.
General Secretary, CPSU
The accident became a test of glasnost. His government moved from a short TASS note to international notification conventions the same year. Memoirs treat Chernobyl as a political accelerant.
IAEA Director General
Flew over the site in 1986 and chaired the international response. English diplomatic memory uses Blix as the face of the IAEA’s first Level 7 crisis.
Firefighters and plant workers appear in UNSCEAR as dose cohorts. Named fame followed the men who spoke in court or in Vienna.
Public-record encyclopedia. Not legal advice. Not a how-to. Graphic detail is withheld. Wars belong in a separate atlas.