KYIV, April 26 – Ukraine observed the 40th anniversary of the Chornobyl nuclear catastrophe on Sunday while grappling with concerns that Russia’s ongoing military campaign could trigger another nuclear emergency at the world’s most infamous atomic disaster site.
Ukrainian officials report that Moscow has consistently launched missiles and unmanned aircraft along flight routes that pass dangerously close to the nuclear facility when targeting Ukrainian population centers. Last year, one such attack caused damage to an essential protective barrier at the site.
The annual remembrance of the catastrophe – which released radioactive contamination across vast portions of Europe despite Soviet officials’ attempts to conceal its magnitude – has gained heightened significance during Russia’s military operation against its neighboring country.
“The Chornobyl disaster was the result of a reactor experiment ordered by Moscow, in violation of safety protocols, and followed by lies and cover-ups,” Ukraine’s foreign ministry said in a statement this week.
“To this day, the world has to face consequences brought by a totalitarian system that subordinated truth and science to ideology and political power.”
The catastrophic explosion and subsequent reactor meltdown at the Soviet-constructed facility’s fourth unit during the early morning hours of April 26, 1986, exposed millions to dangerous radiation levels, displaced hundreds of thousands from their homes, and rendered enormous areas uninhabitable due to contamination.
Thousands of people have died from radiation-induced diseases including cancer in the decades since, though experts continue to debate the complete casualty count and lasting health impacts.
International cooperation led to the construction of a enormous steel and concrete containment structure in 2016, designed to protect the hastily-built concrete shelter that was erected in 1986 to encase massive amounts of radioactive wreckage.
But a Russian drone attack in February 2025 breached the airtight seal of this protective barrier, according to officials. While no radiation leaks were found, the European Bank of Reconstruction and Development estimates repairs will cost at least 500 million euros to prevent lasting harm.
Ukraine’s chief prosecutor revealed to Reuters earlier this week that radar systems had tracked a minimum of 92 Russian drones flying within a five-kilometer radius of the protective structure since June 2024.
For security reasons, Ukrainian authorities typically do not announce details of official memorial events during wartime.
Located approximately 100 kilometers north of Kyiv and surrounded by a 2,600-square-kilometer restricted area, the facility – which Reuters journalists visited Wednesday – sits in an unsettling quietude that extends throughout the surrounding forests.
National Guard troops monitor the site, where roughly 2,250 workers operate in extended shifts to oversee the facility’s gradual dismantling process. Operations at the plant’s final reactor ceased in 2000.
The command center for the destroyed fourth reactor now stands as a darkened chamber filled with damaged and corroded Soviet-era machinery.
Wildlife including moose and feral horses now inhabit the area surrounding the plant and the deserted city of Prypiat, demonstrating how the natural world has reclaimed territory left vacant by human evacuation.
