Overview
- The IAEA says the Zaporizhzhia Nuclear Power Plant has operated on its only remaining external supply since late March after the 750 kV main line went out of service, and the site has experienced three separate losses of off-site power during that period.
- IAEA teams reported intensified military activity around nuclear sites and are negotiating with Ukraine and the Russian Federation for temporary localized ceasefires to permit repair work and reduce nuclear-safety risks.
- IAEA observers were told of an alleged drone strike on a transport department garage that left a large hole in the roof and damaged four buses used to carry plant staff, and teams also received reports of one drone crash near a turbine hall that did not detonate.
- On 22 May a fire at the Dniprovska 750 kV electrical substation linked to military activity led the grid operator to partially disconnect the South Ukraine nuclear plant from off-site power, demonstrating how damage to substations can directly affect reactor power supplies.
- Most on- and off-site radiation monitors continue to send daily data to the IAEA, but the plant reported a communications failure at one off-site monitor and the incidents are increasing stress on staff and could delay vital repairs to power and safety equipment.