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The protective shield covering the Chernobyl reactor core within Ukraine can no longer perform its primary function of blocking radiation, as announced by the IAEA. This loss of function follows a drone attack earlier this year that caused significant damage in the structure.

Damage from Drone Strike Degrades Safety Structure

A drone strike in the second month of the year severely damaged the multibillion-euro “New Safe Confinement” arch. This massive shield, constructed for €1.5bn and completed in 2019, was designed to seal off radioactive material for decades. An IAEA assessment mission confirmed that the drone impact had degraded the structural integrity of the steel arch.

The containment arch's main safety functions, such as confinement, are no longer operational, stated IAEA director general Rafael Grossi. He added that the mission confirmed no permanent damage to its load-bearing structures or monitoring systems.

Historical Context of the Chernobyl Containment

The initial 1986 disaster at Chornobyl – at a time when Ukraine was part of the USSR – released radioactive fallout over much of Europe. In a hurried containment effort, Soviet engineers built a concrete “sarcophagus” over the damaged reactor, but it had a three-decade design life. The New Safe Confinement was erected to enable the future dismantling of the old sarcophagus, the damaged reactor building, and the molten fuel itself.

Current Situation and Necessary Actions

While some repair work has been done, agency officials emphasized that a full-scale repair effort is absolutely necessary. This is needed to stop additional deterioration and to ensure long-term nuclear safety. Ukrainian authorities previously reported that a unmanned aircraft carrying a powerful explosive hit the facility, igniting a blaze and compromising the protective cladding.

• Radiation Levels: Reports indicated radiation levels stayed within safe limits following the attack with no reports of radiation leaks.
• Geopolitical Context: Russian forces seized the Chernobyl exclusion zone for more than 30 days in the early phase of the 2022 invasion.
• Broader Inspection: The IAEA carried out this inspection alongside a nationwide survey of conflict-related damage to the country's electricity infrastructure.

The situation underscore the ongoing vulnerabilities at one of the the planet's most notorious atomic accident locations during ongoing armed conflict.