All events · Cold War Proxies

Chernobyl Evacuation and Exclusion Zone

c. 1986–1991 · Europe & Northern Eurasia

Displacement

Displaced

346,000

116,000 people evacuated in the spring and summer of 1986, including all 45,000 residents of Pripyat, and a further 230,000 relocated in subsequent years, per the World Health Organization; the World Nuclear Association gives 220,000 for the later relocations. About 1,000 people, mostly elderly, returned unofficially to the zone.

Share of the population affected

6.9%

of the population living in the areas of Belarus, Ukraine and Russia designated as contaminated after the accident, 1986

Killed

30–9,000

excess mortality incl. disease and starvation

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What happened

The explosion and fire at reactor 4 of the Chernobyl plant on 26 April 1986 released large quantities of radionuclides across Ukraine, Belarus and Russia. Pripyat, a town of 45,000, was evacuated on 27 April, and 116,000 people in total were removed from the 30-kilometre zone by mid-May; the World Health Organization records a further 230,000 relocated from contaminated districts in later years, giving a state-ordered permanent removal of roughly 350,000 people. The zone remains closed to habitation, though about a thousand mostly elderly returnees, the samosely, moved back informally. Thirty people died immediately or within weeks from the explosion and acute radiation syndrome. The WHO expert group projected up to 4,000 additional cancer deaths over the lifetimes of the most exposed groups, which are the liquidators, evacuees and residents of strictly controlled zones, and up to a further 5,000 among the roughly five million people living in less contaminated areas; other researchers have published far higher projections, and the true long-term toll is unlikely ever to be known precisely.

Parties

Soviet authorities evacuated and then permanently resettled the population of the contaminated area around the Chernobyl nuclear plant in Ukraine and Belarus

Disputed

Whether a public-health evacuation belongs in the same category as politically motivated forced displacement is itself arguable, and the long-term death toll is strongly disputed, with WHO and UNSCEAR projections of thousands set against non-governmental estimates running to tens or hundreds of thousands.

The denominator

The Chernobyl Forum, whose findings the IAEA and WHO published in 2005-06, reported that about 5 million people lived in areas of the three republics contaminated with radionuclides, some 100,000 of them in zones formerly classed as 'strict control'. About 116,000 people were evacuated from the 30-kilometre zone in 1986 and a further 220,000 were relocated in subsequent years, giving the roughly 340,000 total resettled.

Where the baseline comes from

Chernobyl: The True Scale of the Accident — IAEApress
Chernobyl Exclusion Zone — Wikipediaopen-edited

On the death toll

The low figure is the count of immediate deaths from the explosion and acute radiation syndrome, which is not seriously disputed. The high figure combines the WHO expert group's projections of up to 4,000 eventual cancer deaths among the most exposed groups and up to 5,000 among the wider contaminated-area population; these are statistical projections rather than counted deaths, and other researchers have produced far larger estimates using different dose-response assumptions.