Chornobyl Disaster Shelter Can No Longer Blocks Radiation, Requires Major Repair – IAEA

A protective shield covering the Chornobyl nuclear reactor in Ukraine has lost its primary safety function of containing radioactive material, as announced by the IAEA. This loss of function comes after a drone strike in February that caused significant damage in the protective shell.

Damage from Drone Strike Compromises Containment System

A drone strike in the second month of the year caused a breach in the multibillion-euro “new safe confinement” structure. This enormous protective structure, constructed for €1.5bn and completed in 2019, was designed to contain radiation over the long term. A recent IAEA inspection last week found that the drone impact had degraded the integrity of the steel arch.

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

Background Context of the Chernobyl Containment

The original 1986 disaster at the Chernobyl plant – at a time when Ukraine was a republic within the USSR – released radioactive fallout across Europe. During a frantic response, Soviet engineers constructed a concrete shelter over the damaged reactor, but it had a 30-year lifespan. The New Safe Confinement was erected to enable the eventual decommissioning of the old sarcophagus, the damaged reactor building, and the melted nuclear fuel itself.

Present Status and Necessary Actions

Although limited repair work has been done, agency officials emphasized that comprehensive restoration is absolutely necessary. This is needed to prevent further degradation and to guarantee safety for the coming decades. Ukrainian authorities previously reported that a drone carrying a high-explosive warhead hit the facility, igniting a blaze and compromising the outer shielding.

• Radiation Readings: Reports indicated background radiation remained within safe limits after the incident with no reports of any leakage.
• Conflict Background: Russian forces seized the Chernobyl exclusion zone for over a month in the early stages of the 2022 invasion.
• Broader Inspection: The agency conducted this review concurrently with a nationwide survey of conflict-related damage to Ukraine's power substations.

The situation underscore the persistent risks at one of the the planet's most notorious nuclear disaster sites amid continued armed conflict.