The containment structure covering the Chornobyl reactor core in Ukraine has lost its main safety function of containing radioactive material, as announced by the IAEA. This loss of function follows a drone attack in February that blew a hole in the structure.
A drone strike in February severely damaged the so-called “New Safe Confinement” structure. This enormous protective structure, built at a cost of €1.5bn and completed in 2019, was intended to contain radiation over the long term. A recent IAEA inspection last week confirmed that the drone impact had degraded the structural integrity of the steel confinement.
The containment arch's main safety functions, such as confinement, are no longer operational, said IAEA head Rafael Grossi. Grossi noted that the mission confirmed no permanent damage to its load-bearing structures or monitoring systems.
The initial 1986 explosion at the Chernobyl plant – at a time when Ukraine was part of the USSR – released radioactive fallout over much of Europe. During a frantic response, Soviet authorities built a concrete “sarcophagus” over the damaged reactor, but it had a 30-year lifespan. The new confinement was constructed to allow for the future decommissioning of the old sarcophagus, the destroyed reactor hall, and the molten fuel itself.
While some repairs have been carried out, agency officials emphasized that a full-scale repair effort is absolutely necessary. This is required to stop additional deterioration and to ensure safety for the coming decades. Officials in Ukraine had stated that a unmanned aircraft armed with a high-explosive warhead struck the plant, igniting a blaze and compromising the protective cladding.
The situation highlight the ongoing vulnerabilities at one of the world's most notorious atomic accident locations amid continued armed conflict.