The sixth power unit of the Zaporizhzhya NPP has been put into “hot shutdown” mode

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The sixth power unit of the Zaporizhzhya NPP has been switched to a "hot stop"

Illustrative photo from open sources

On Sunday, August 13, Russian occupiers put power unit #6  of the Zaporizhzhia nuclear power plant into a "hot shutdown" mode, reactor unit power unit #4 is in a “cold stop” state. This was reported by the occupation administration of the NPP.

“Cold stop” – the safe state of the nuclear reactor when it is shut down at low pressure and low temperature of the cooling water. “Hot stop” – the mode in which the water is heated from a non-working reactor.

Previously, the Ukrainian “Energoatom” reported that the Zaporizhzhia NPP lost power from the main 750 kV high-voltage transmission line on the night of August 10 and was transferred to a 330 kV backup line. “Rosenergoatom” confirmed this information.

At the beginning of July, after four months, the NPP was again connected to one of the six spare 330 kV power transmission lines. It was planned to use it as a spare. 

At the end of July, the IAEA reported that the ZNPP completed the planned transfer of power unit #5 to "cold stop", and power unit #4 – to "hot". Later, the fourth power unit was transferred to cold shutdown mode.

BAGNET reminds that since March 4, 2022, the Zaporizhzhya NPP station has been under the control of Russian invaders. Russian troops periodically shell the station. During one of the attacks, the warhead of the missile fell 400 meters from the NPP power unit. In May, the occupiers stopped all units.

IAEA experts have been present at the ZNPP since September 1, 2022, after the first visit of the agency's general director, Raphael Grossi, to the station. >Prepared by: Serhiy Daga