In case of power supply problems, the main threat to nuclear and radiation safety is the 4th power unit.
The ZNPP is again under threat: the station lost power from the main line at night / photo by Energoatom
On the night of August 10, the temporarily occupied Zaporizhzhia nuclear power plant lost power from the main external power transmission line with a voltage of 750 kV. After that, the ZNP had to switch to the only available backup line of 330 kV. “Energoatom” warns – disconnection of the reserve line threatens the nuclear power plant with the loss of any external power supply
“In the case of this scenario, the main threat to nuclear and radiation safety is the presence of the 4th power unit of the Zaporizhzhya NPP in a state of “hot shutdown”, which the occupiers are operating in violation of the terms of the license for the operation of the reactor facilities of the NPP of the Ukrainian regulator (State Regulation),” the company notes.
The head of “Energoatom” Taras Tkach noted that in the event of a complete loss of external power, the station’s main circulation pumps will be turned off and the power unit will switch to “natural circulation” mode.
“In this case, it is necessary to urgently “cool down” it in the absence of cooling pumps,” Tkach notes.
NAEK emphasizes that this mode is difficult for the reactor plant, its long-term use can lead to the failure of the main equipment of the power unit.
The news is updated…