Nuclear Safety Concerns Amid Ongoing Conflict in Ukraine

Recent reports have raised alarms regarding the structural integrity of the New Safe Confinement (NSC) at the Chernobyl nuclear power plant, which is crucial for preventing radiation leaks from the site of the 1986 disaster. In February 2025, a Russian explosive drone reportedly struck the protective shelter, leading to concerns about its potential collapse. Ukrainian President Volodymyr Zelensky confirmed that a fire at the site was quickly extinguished, while Russia denied any intention to target the facility. The International Atomic Energy Agency (IAEA) indicated that the NSC, completed within the last decade, is in urgent need of repairs to effectively contain radiation.

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Greenpeace's Ukrainian branch highlighted the NSC's deteriorating condition in a report authored by engineer Eric Schmieman, who was involved in its design. The report is set to be submitted to Ukrainian prosecutors as part of investigations into alleged Russian war crimes. The 40th anniversary of the Chernobyl disaster serves as a grim reminder of the catastrophic consequences of nuclear accidents, with at least 30 immediate fatalities and millions exposed to radiation.

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In a separate incident, the Zaporizhzhia Nuclear Power Plant (ZNPP) temporarily lost all off-site power, raising further concerns about nuclear safety amid ongoing conflict. The IAEA reported that the plant was disconnected from its last external power line, although power was restored approximately 90 minutes later via a lower-voltage backup line. The ZNPP, located in Enerhodar, has experienced off-site power losses more than a dozen times since Russia's full-scale invasion of Ukraine in February 2022. These incidents have heightened fears of a nuclear disaster, as the facility is situated on the front lines of the conflict.

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IAEA chief Rafael Grossi emphasized that the repeated loss of off-site power underscores the nuclear safety risks associated with the ongoing war. Vitaly Fedchenko, a senior researcher at the Stockholm International Peace Research Institute, noted that each power loss increases thermal and operational stress on safety systems, potentially compromising their effectiveness.

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The situation at both Chernobyl and the ZNPP highlights the precarious nature of nuclear safety in conflict zones. The ZNPP, which was responsible for generating over a fifth of Ukraine's energy before the war, remains a contentious issue in peace negotiations involving the United States, Ukraine, and Russia. While most countries recognize the plant as part of Ukraine, it is currently under Russian control.

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The ongoing conflict poses significant challenges to nuclear safety, with international experts and organizations closely monitoring developments. The potential for catastrophic incidents at these nuclear sites remains a pressing concern as the war continues.

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• “Off site power loss once again highlights nuclear safety risks during the conflict,” — Rafael Grossi, IAEA Chief

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• “Each instance of loss of external power imposes thermal and operational stress on safety systems, increasing the chance that at some point the on-site backup systems will not perform as designed,” — Vitaly Fedchenko, Senior Researcher, Stockholm International Peace Research Institute

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