Ukraine’s Zaporizhzhya Nuclear Power Plant (ZNPP) has restored its connection to a 150 kilovolt (kV) power line that could be used as a back-up option for the plant, although the supplies of electricity needed for reactor cooling and other essential functions remain fragile, Director General Rafael Mariano Grossi of the International Atomic Energy Agency (IAEA) said today.
The 150 kV line was reportedly damaged in shelling late last month, further limiting the potential availability of power supplies for the ZNPP as this line connects the site to the switchyard of the nearby Zaporizhzhya Thermal Power Plant. However, the IAEA team stationed at the ZNPP was informed this week that the repairs had been completed and the line was once again available, if needed.
During the military conflict, the ZNPP has been relying on two power lines – one 750 kV and one 330 kV – for off-site electricity but both have suffered repeated disconnections as a result of the fighting, underlining the potential importance of any additional source of electricity. Before the conflict, the ZNPP had ten power lines available.
During the past week, the IAEA team has continued to hear explosions, including some blasts close to the ZNPP, although no damage to the plant was reported.
The IAEA team conducted regular walkdowns across the ZNPP, including by the sprinkler ponds and in the turbine halls of two units, and observed ongoing maintenance activities of one main transformer as well as testing of one emergency diesel generator pertaining to part of the safety system.
The IAEA teams present at the Khmelnytskyy, Rivne and South Ukraine NPPs and the Chornobyl site reported that nuclear safety and security is being maintained despite the effects of the ongoing conflict, including air raid alarms for several days over the past week.
At the Rivne NPP, reactor unit 2 has been reconnected to the grid following planned outage. Following an air raid alert, the IAEA team deployed at Khmelnytskyy NPP took shelter in the morning of 7 October.