Two explosions rocked the Chernobyl nuclear power plant decades apart, each leaving a distinct mark on the site and its legacy.
The first and most catastrophic occurred on April 26, 1986, during a safety test gone wrong at Reactor 4. A sudden power surge led to a steam explosion that ruptured the reactor vessel, followed by a second explosion that blew off the reactor’s 1,000-ton concrete lid. This released massive quantities of radioactive material into the atmosphere, contaminating large swaths of Europe and prompting the evacuation of over 100,000 people from the surrounding exclusion zone. The event remains the worst nuclear disaster in history.
The second explosion took place on February 12, 2022, early in Russia’s full-scale invasion of Ukraine. Russian forces shelled the Chernobyl site, hitting a training building and causing a fire that sent smoke plumes into the air. While no radioactive release was detected, the attack raised international alarm over the vulnerability of nuclear facilities in conflict zones. The International Atomic Energy Agency (IAEA) confirmed the shelling and urged restraint to prevent any risk to nuclear safety.
Ukrainian officials reported that Russian troops seized control of the Chernobyl Exclusion Zone shortly after the bombardment, holding it for over a month before withdrawing as part of a broader redeployment from northern Ukraine. During their occupation, forces disturbed topsoil in the Red Forest — one of the most contaminated areas — raising concerns about resuspension of radioactive particles, though monitoring showed no significant increase in radiation levels beyond the zone.
Following the withdrawal, Ukrainian authorities regained control of the site and resumed routine monitoring and maintenance operations. The IAEA has since conducted multiple verification missions to assess the condition of the facilities and ensure nuclear safety and security protocols are upheld.
Today, the Chernobyl site remains under active management, with the New Safe Confinement structure — completed in 2019 — enclosing the damaged Reactor 4 to prevent further environmental release. Ongoing efforts focus on decommissioning, waste management, and long-term ecological monitoring within the exclusion zone.
