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          Update 301 – IAEA Director General Statement on Situation in Ukraine

          64/2025
          Vienna, Austria

          Ukraine’s Zaporizhzhya Nuclear Power Plant (ZNPP) remains connected to its last remaining main power line following the recent loss of all off-site power on 4 July, an ongoing situation that highlights the heightened nuclear safety and security risks during the conflict, Director General Rafael Mariano Grossi of the International Atomic Energy Agency (IAEA) said today.

          The loss of power– the ninth since the start of the conflict in February 2022 – forced the ZNPP to rely on its backup diesel generators for almost four hours as the plant’s one remaining back-up line remains disconnected after being reportedly damaged by military activity on 7 May. The IAEA team based at the ZNPP site— Europe’s largest nuclear facility — was informed this week that the emergency diesel generator fuel tanks used during the loss of power have since been replenished and the site has enough fuel to enable operation of emergency diesel generators for approximately 20 days, in case of a loss of off-site power event.

          The IAEA team at South Ukraine nuclear power plant (SUNPP) reported that the plant also lost its connection to one 750 kilovolt (kV) off-site power line on 4 July, for approximately the same time as the ZNPP lost off-site power. During that time, the SUNPP continued to receive off-site power from its other 750 kV line and all of its 330 kV power lines. There was no impact on the one unit currently operating, while the other two units continue planned maintenance and refueling activities.

          The IAEA team continued to assess the availability of spare parts necessary for the continued safe operation of the plant by visiting the storage areas for the parts in the thermomechanical and electrical warehouses located within the ZNPP’s site perimeter and will be requesting the findings of recent audits by the ZNPP of spare parts. The team is also expecting to be updated on the delayed procurement of spare parts needed so that the ZNPP can commence annual maintenance of all 20 emergency diesel generators which are essential to safety in case of a loss of off-site power event.

          Also this week, the IAEA team reported that maintenance activities continue at the site, including on one safety train of unit 2 and on the main transformer of unit 4, while maintenance on one safety train of unit 5 is expected to be completed on Friday. Recently, the team also visited all main control rooms where it confirmed the number of operating staff present and recorded safety parameters for all units.

          The IAEA team reported hearing military activity on most days over the past week, including gunfire near the plant on 4 July and three explosions close to the plant on 5 July.

          The IAEA team at the Rivne nuclear power plant (NPP) reported that one reactor continues its planned maintenance and refueling activities, and one other unit was required to temporarily reduce reactor power to enable for the inspection and repair of one of the turbines. The repairs were successfully completed, and the reactor has returned to nominal full power.

          IAEA teams present at all sites — the Khmelnytskyy, Rivne and South Ukraine NPPs and the Chornobyl NPP site — reported hearing air raid alarms on most days over the past week. At the Khmelnytskyy NPP the team was informed that drones were observed as close as five kilometres from the site, while the team at the Rivne NPP had to shelter at its hotel on two separate days and the teams at the Khmelnytskyy and Rivne NPPs sheltered at site today. The team at the Chornobyl NPP site reported hearing the sounds of a drone and anti-aircraft fire at the Chornobyl NPP site on the evening of 9 July, and were informed by the site management that a drone had reportedly flown over the open switchyard and was intercepted by the military.?

          As part of the IAEA’s comprehensive assistance programme to support nuclear safety and security in Ukraine, the Chornobyl NPP site received equipment aimed at enhancing the nuclear security measures at the site and the Khmelnytskyy and South Ukraine NPPs received equipment aimed at enhancing radiation monitoring capabilities. Additionally, the Ukrainian Hydrometeorological Center and the hydrometeorological organizations of the State Emergency Service of Ukraine received multipurpose radiation monitoring devices.

          These deliveries were funded by the European Union, Switzerland and the United Kingdom, and brought the total number of IAEA-coordinated deliveries since the start of the armed conflict to 146.

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          Last update: 10 Jul 2025

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