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The containment structure covering the Chornobyl reactor core within Ukraine can no longer perform its main safety function of containing radioactive material, as announced by the IAEA. This failure comes after a drone strike in February that blew a hole in the structure.

Damage from Drone Strike Compromises Containment System

An attack by an unmanned aerial vehicle in the second month of the year caused a breach in the so-called “new safe confinement” arch. This massive shield, constructed for €1.5bn with work finishing in 2019, was intended to seal off radioactive material over the long term. An IAEA inspection last week 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, said IAEA director general Rafael Grossi. Grossi noted that inspectors found no lasting harm to its load-bearing structures or monitoring systems.

Historical Context of the Chernobyl Shelter

The original 1986 explosion at the Chernobyl plant – which occurred when Ukraine was a republic within the USSR – spewed radiation over much of Europe. During a frantic response, Soviet authorities built a concrete “sarcophagus” over the ruined reactor, though it possessed only a 30-year lifespan. The New Safe Confinement was erected to enable the eventual decommissioning of the original structure, the destroyed reactor hall, and the melted nuclear fuel within.

Current Situation and Necessary Steps

While some repairs have been carried out, agency officials emphasized that comprehensive restoration is essential. This is required to prevent further degradation and to ensure safety for the coming decades. Ukrainian authorities had stated that a unmanned aircraft carrying a high-explosive warhead struck the plant, igniting a blaze and compromising the outer shielding.

• Radiation Readings: Authorities confirmed radiation levels stayed within safe limits after the incident with no indication of radiation leaks.
• Conflict Background: Russian forces occupied the Chernobyl exclusion zone for over a month during the initial stages of the 2022 invasion.
• Broader Inspection: The IAEA conducted this inspection alongside a country-wide assessment of conflict-related damage to the country's electricity infrastructure.

The situation highlight the ongoing vulnerabilities at one of the world's most infamous nuclear disaster sites amid continued armed conflict.