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 perimeteeded 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.