Fire at Dniprovska Substation Disrupts Nuclear Power Supply in Ukraine

• •A fire at Dniprovska substation disrupted power to South Ukraine nuclear plant.
• •IAEA expressed serious concern over military actions affecting nuclear safety.
• •Ukraine's reliance on nuclear power has risen to 80% amid ongoing conflict.

On May 22, 2026, a fire broke out at the Dniprovska 750-kilovolt electrical substation in Ukraine due to military activity, leading to the partial disconnection of the South Ukraine nuclear power plant from off-site power. The International Atomic Energy Agency (IAEA) reported that firefighters were deployed to manage the situation. IAEA Director General Rafael Grossi expressed deep concern over the targeting of critical infrastructure essential for nuclear safety. The Dniprovska substation also supplies power to the Zaporizhzhia nuclear power plant, which has been under Russian control since early 2022. The ongoing conflict has heightened risks to nuclear safety, with both sides accusing each other of military actions that threaten these facilities. The IAEA has been attempting to negotiate a ceasefire to facilitate repairs to damaged power lines. Ukraine's reliance on nuclear power has increased to 80% since the Russian invasion, underscoring the critical nature of maintaining operational nuclear facilities.