IAEA confirms drone strike damaged cooling tower at Russia’s Kursk nuclear plant

A drone struck the cooling tower of a nuclear power plant unit in western Russia on July 5, and the International Atomic Energy Agency has now formally acknowledged the damage. IAEA Director General Rafael Mariano Grossi addressed the incident on July 9, reinforcing concerns that nuclear facilities in conflict zones face an increasingly dangerous threat landscape.

The strike hit the cooling tower of unit 2 at Kursk NPP-2, a next-generation nuclear plant still under construction in the Kurchatov area of Russia’s Kursk region. Russian authorities reported no injuries, no radiological consequences, and no operational impacts from the hit, largely because the targeted unit isn’t operational yet.

What happened at Kursk-II

According to information relayed by Russian officials to the IAEA, the drone impact damaged the cooling tower structure but did not compromise any active nuclear systems. That’s because Kursk NPP-2 is a replacement facility for the aging Kursk nuclear power plant, which runs Soviet-era RBMK reactors, the same design involved in the 1986 Chernobyl disaster.

The new plant is designed to house four VVER-TOI reactors, a modern pressurized water reactor design that represents Russia’s latest iteration of nuclear technology. Unit 1 of Kursk-II entered commercial operations just two months ago, in May 2026. Unit 2, the one struck by the drone, has not yet reached that stage.

Russian air defense systems in the Kurchatov area intercepted 12 unmanned aerial vehicles during the same period. The cooling tower strike appears to have come from a UAV that evaded those defenses, though the non-operational status of the unit meant the consequences were structural rather than radiological.

A growing pattern near nuclear sites

This is not an isolated event. Since the conflict in Ukraine began in 2022, drone-related incidents have repeatedly affected nuclear facilities across the region. Now that pattern has extended deeper into Russian territory, with the Kursk region serving as a flashpoint in the conflict.

Grossi has been one of the most vocal international figures on the issue, repeatedly calling for the establishment of nuclear safety zones around active and under-construction plants. His statement on July 9 continued that theme, highlighting what he described as precarious safety and security conditions around nuclear facilities caught in or near conflict zones.

Rafael Mariano Grossi cited the incident as evidence of ongoing concerns over nuclear safety amid the Ukraine conflict.

The IAEA’s ability to act, however, remains limited. The agency is a monitoring and advisory body, not an enforcement one. It can confirm damage, issue warnings, and send inspection teams, but it cannot compel either side in the conflict to establish buffer zones or cease military operations near nuclear sites.

Why cooling towers matter

For those unfamiliar with nuclear plant design, a cooling tower is not where the nuclear reaction happens. It’s part of the heat dissipation system that removes excess thermal energy from the power generation process. In an active unit, damage to a cooling tower could force a reactor shutdown as a precautionary measure, but it would not, on its own, cause a meltdown or radiological release.

Russia’s VVER-TOI design does incorporate modern containment structures that are more robust than their Soviet predecessors. But no civilian nuclear facility was engineered to withstand sustained military attack.