59. The Ukrainian plant staff and managers reported to the team that 17 EDGs (including
two common EDGs for the site) for Units 1 to 5 had started as per design and that Unit 6 had
entered into islanding operation mode and supplied its own power supply when the plant
had lost all four external power supply lines on 25 August before the 750 kV/330 kV power
line to the thermal power plant had been restored. All six units have the capacity to enter into
islanding operation mode and to supply power to other units on site with 3–4 hours needed
to complete the connection process.
60. It was also confirmed to the team that normally each EDG had a fuel inventory to
sustain its operation for ten days, and that there were 2250 tonnes of diesel fuel available
for the whole site. The plant had a contract with fuel suppliers; however, the delivery of the
fuel to the ZNPP site had been complicated by the current situation, and discussions were
in progress to enable fuel to be delivered to the site.