The International Atomic Energy Agency received information about the probability of disconnection of the Zaporizhzhya NPP from the last backup 750 kV power transmission line. So the station can switch to power from generators again.
This is reported in the IAEA report.
As IAEA Director General Rafael Mariano Grossi reminded, the last 330 kilovolt (kV) backup transmission line at the Zaporizhzhya NPP has been damaged since March 1.
"It remains offline and undergoing repairs, which once again highlights the fragility of nuclear safety and security at Europe's largest nuclear power plant," Grossi said.
At the same time, he noted that for three weeks the ZNPP received electricity from only one main external power transmission line of 750 kV.
"The plant needs an external power supply to perform essential nuclear safety functions. Without a backup line, any damage to the 750kV line would result in a complete loss of the plant off-site," explains Grossi.
He said that the restoration of the line was planned for March 5, 10, and then March 13, but this was never achieved. The last date for reconnection is scheduled for March 23.
"The connection to the 750 kV line may be disconnected for an unknown period of time for maintenance/repairs to be carried out on the line. There is currently no information as to whether, when, or for how long this may happen. It is important that coordination and communication between dispatcher of Ukrainian power grids and the station," Grossi notes.
The Director General of the IAEA warned that nuclear safety at the ZNPP remains in a critical state.
"If this mainline outage and repair work is carried out when the 330kV line is unavailable, it will cause a total loss of power and make the station dependent on diesel generators - its last line of defense for the seventh time," Grossi concluded.
We will remind that on March 9, the Zaporizhzhya nuclear power plant was completely de-energized due to Russian shelling.
Let's add, after which specialists managed to restore power supply to the ZNPP, but in any case, this blackout threatened a nuclear disaster.