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The containment structure covering the Chornobyl nuclear reactor within Ukraine can no longer perform its main safety function of containing radioactive material, as announced by the IAEA. This loss of function follows a drone strike earlier this year that blew a hole in the protective shell.

Structural Compromise from Aerial Attack Compromises Safety Structure

A drone strike in the second month of the year severely damaged the so-called “new safe confinement” arch. This massive shield, built at a cost of €1.5bn and completed in 2019, was designed to contain radiation for decades. An IAEA assessment mission confirmed that the strike had degraded the structural integrity of the steel arch.

The [protective structure] had lost its primary safety functions, including the confinement capability, stated IAEA director general Rafael Grossi. He added that the mission confirmed no permanent damage to key support structures or monitoring systems.

Historical Context of the Chornobyl Shelter

The initial 1986 explosion at Chornobyl – which occurred when Ukraine was a republic within the Soviet Union – spewed radioactive fallout over much of Europe. In a hurried containment effort, Soviet authorities built a concrete shelter over the damaged reactor, though it possessed only a 30-year lifespan. The New Safe Confinement was erected to enable the future decommissioning of the old sarcophagus, the damaged reactor building, and the molten fuel within.

Current Situation and Necessary Steps

While some repairs have been carried out, agency officials emphasized that comprehensive restoration is essential. This is needed to stop additional deterioration and to guarantee safety for the coming decades. Ukrainian authorities previously reported that a unmanned aircraft armed with a powerful explosive struck the facility, igniting a blaze and damaging the protective cladding.

• Radiation Levels: Reports indicated radiation levels remained within safe limits after the incident with no indication of any leakage.
• Geopolitical Context: Moscow's troops occupied the Chornobyl site for over a month during the initial stages of the 2022 invasion.
• Broader Inspection: The agency carried out this review concurrently with a country-wide assessment of conflict-related damage to the country's power substations.

These developments underscore the ongoing vulnerabilities at one of the world's most notorious atomic accident locations during ongoing armed conflict.