A plant under occupation
Published 12 October 2026
The plant's own chronology records signs of the coming invasion on February 18, 2022: during joint Russian-Belarusian exercises, a pontoon bridge appeared over the Pripyat river four kilometres from the Ukrainian border. On February 24, 2022, the day Russia began its full-scale invasion of Ukraine, Russian forces moving from Belarusian territory entered the exclusion zone and seized the Chernobyl plant. At six in the morning on the day of the invasion, the plant shift supervisor was told of a large column of military vehicles near a zone checkpoint, and warned personnel over loudspeaker to move to shelter. There were about 150 operational and support staff on site, guarded by 178 National Guard servicemen. The guard commanders decided not to resist, judging that a firefight with heavy armour could damage buildings and structures and risk a nuclear accident at the site. C099, chnpp.gov.ua, The full-scale war of russia against Ukraine
The occupation turned a decommissioned disaster site into a military position. The plant's chronology says the Russian force used the industrial site as a base for soldiers and military machines. On March 9, shelling damaged power lines and the plant lost external electricity, forcing staff to run backup diesel generators while repairs were impossible in occupied territory. The workers who had taken over their shift on February 23 were held at their workplaces for more than 600 hours instead of a twelve-hour shift, until a rotation on March 20 allowed 106 people to leave. A nuclear site depends on power, rotation of rested staff and maintenance routines; the occupation stressed all three at a place whose safety case is containment and monitoring rather than an operating reactor. C098, bbc.com, Ukraine war: Russian troops leave Chernobyl, Ukraine says C099, chnpp.gov.ua, The full-scale war of russia against Ukraine
The most alarming account came from two workers who were present when the site was taken. They told Reuters that Russian soldiers drove armoured vehicles without radiation protection through the Red Forest, the highly contaminated woodland named after the pine trees that turned red after absorbing radiation from the 1986 explosion, and that the convoys kicked up radioactive dust. One worker called the soldiers' exposure suicidal. These are eyewitness claims attributed to named-role sources, not instrument readings, and Reuters reported them as such. Ukraine's state nuclear inspectorate had already said on February 25 that heavy military vehicles disturbing the soil had increased radiation levels at the site. Russia, after capturing the plant, said radiation levels there stayed within a normal range. C097, reuters.com, Unprotected Russian soldiers disturbed radioactive dust in Chernobyl's 'Red Forest',...
The Reuters account also explains why its witnesses remained unnamed. They were interviewed by telephone and asked for anonymity because they feared for their safety; Reuters said it could not independently verify their accounts. That limitation is part of the evidence, not a reason to remove the account from the history or to present it as confirmed measurement. The workers were reporting what they had seen around a site where they were responsible for the safe storage of spent fuel and supervision of the ruined reactor. An eyewitness can describe a convoy and dust without knowing the dose received by every soldier who passed through it. The distinction between observation and inferred exposure is especially important in this setting. It prevents the visible movement of vehicles from becoming an unsupported count of injuries, while preserving the reason contaminated terrain and interrupted monitoring caused concern. C097, reuters.com, Unprotected Russian soldiers disturbed radioactive dust in Chernobyl's 'Red Forest',...
In the March 31 withdrawal reporting, the limits of the measurements remained important. The head of Ukraine's exclusion-zone agency said radiation levels appeared normal and there was no indication of significant damage, but that the monitoring sensors were not working and staff would need to check the facilities. The International Atomic Energy Agency said it could not confirm the reports of raised exposures. The available reports did not establish a second radiological disaster, and nuclear experts stressed that no working reactor existed at the site to repeat the 1986 accident. It is instead a story of avoidable risk: contaminated ground treated as ordinary terrain by an army, reported through incomplete accounts and limited monitoring, at the site whose name had become the worldwide shorthand for nuclear disaster. C097, reuters.com, Unprotected Russian soldiers disturbed radioactive dust in Chernobyl's 'Red Forest',... C098, bbc.com, Ukraine war: Russian troops leave Chernobyl, Ukraine says
By March 31, Ukraine said the Russian troops had left. Energoatom, the state nuclear company, reported that plant staff said no outsiders remained at the site, that some forces had departed towards the Belarusian border, and that the military had abducted members of the National Guard held since the start of the war, without giving numbers. The company also said the troops had dug trenches in the most contaminated part of the zone and had received significant doses, with unconfirmed reports that some were treated in Belarus. The IAEA said it was in close consultation about sending a mission to the plant. As with the dust reports, the trench and dose claims were the company's account sourced to plant workers, awaiting on-site verification once access returned. C098, bbc.com, Ukraine war: Russian troops leave Chernobyl, Ukraine says
The scientific concern after the withdrawal was quieter than the fear of a new explosion. Specialists interviewed at the time pointed to the loss of regular communication between the site and the IAEA, which maintains the safety log of where hazardous material is held, and to the need to re-establish that nothing was missing. Others worried about the exclusion zone itself: over nearly four decades it had become a site for wildlife and international research, and Ukrainian researchers did not know whether they would have laboratories to return to. The occupation added a new layer to the site's history. A place created by the failure of one state's nuclear institutions became, thirty-six years later, a battlefield in another state's war, with its roads, laboratories and confinement under someone else's guns. C098, bbc.com, Ukraine war: Russian troops leave Chernobyl, Ukraine says C099, chnpp.gov.ua, The full-scale war of russia against Ukraine
The plant's chronology takes the story beyond the first news of withdrawal. It records Russian forces leaving the industrial site on March 31, the raising of Ukraine's flag near the administrative building on April 2, and April 3 as the official date of de-occupation, when Ukrainian forces announced control of the border with Belarus. These dates describe different stages, rather than competing answers to a single question. Departure from the site, a public ceremony and restoration of border control need not happen at the same moment. Retaining that sequence avoids treating the first announcement of withdrawal as proof that every part of the surrounding territory was already accessible and secure. The chronology is the plant's retrospective account, and its official designation of de-occupation is kept as such. It does not make the earlier reports of departure wrong. It gives them a more specific place in the return of control. C098, bbc.com, Ukraine war: Russian troops leave Chernobyl, Ukraine says C099, chnpp.gov.ua, The full-scale war of russia against Ukraine
The account of consequences describes work disrupted after the soldiers had gone. The plant says its staff did not lose control of nuclear materials and kept the site as safe as possible, while soldiers stole or destroyed equipment and the occupation damaged personnel's physical and psychological health. It also says disruption of work schedules would have long-term effects on the plant's processes. These are the operator's claims about its own site and staff. They should not be treated as an independent medical assessment or a complete financial audit. Their practical meaning is that withdrawal was not the same thing as restoration. People had to recover, equipment had to be checked or replaced and planned work had to resume. The absence of a new reactor accident did not mean the occupation had left the organisation or its safety work untouched. C098, bbc.com, Ukraine war: Russian troops leave Chernobyl, Ukraine says C099, chnpp.gov.ua, The full-scale war of russia against Ukraine
Transport was one of the lasting problems in that account. The plant says the earlier journey from Slavutych took forty-five minutes by train, while disrupted routes left personnel travelling six to ten hours by bus. It lists damage to the secured perimeter, breaches of radiation-safety and sanitary-access rules, and a temporary stop to current and planned activities, including movement of spent fuel from the old storage facility to the new one. These details turn a general statement about damage into a description of daily operating constraints. The journey times belong to the plant's account of changed routes, not a current travel estimate for visitors. The fuel-transfer interruption is a reported disruption, not a claim that control of the fuel was lost. Both distinctions matter to understanding what the return to work required. C099, chnpp.gov.ua, The full-scale war of russia against Ukraine