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A protective shield covering the Chernobyl nuclear reactor in Ukraine has lost its primary function of containing radioactive material, as announced by the International Atomic Energy Agency (IAEA). This failure comes after a drone attack in February that caused significant damage in the protective shell.

Damage from Drone Strike Compromises Safety Structure

A drone strike in February caused a breach in the so-called “new safe confinement” structure. This enormous protective structure, constructed for €1.5bn with work finishing in 2019, was intended to contain radiation for decades. A recent IAEA inspection last week confirmed that the drone impact had degraded the structural integrity of the steel confinement.

The [protective structure] had lost its primary safety functions, including the confinement capability, stated IAEA director general Rafael Grossi. Grossi noted that inspectors found no lasting harm to its load-bearing structures or sensor systems.

Historical Context of the Chornobyl Containment

The initial 1986 disaster at Chornobyl – which occurred when Ukraine was part of the USSR – spewed 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 constructed to enable the eventual dismantling of the old sarcophagus, the destroyed reactor hall, and the molten fuel itself.

Present Status and Necessary Actions

While some repair work has been done, the IAEA emphasized that a full-scale repair effort is essential. This is needed to prevent further degradation and to ensure safety for the coming decades. Officials in Ukraine previously reported that a unmanned aircraft armed with a high-explosive warhead struck the facility, causing a fire and compromising the outer shielding.

• Radiation Readings: Reports indicated radiation levels remained within safe limits following the attack with no reports of radiation leaks.
• Geopolitical Context: Russian forces occupied the Chernobyl exclusion zone for more than 30 days in the early phase of the full-scale war.
• Wider Assessment: The IAEA carried out this review alongside a country-wide assessment of conflict-related damage to the country's electricity infrastructure.

These developments highlight the persistent risks at one of the world's most infamous nuclear disaster sites during ongoing hostilities.