Station Blackout Generators

Question 1

Within what amount of time am I required to start up and load an SBOG?

Answer 1

1 Hour

Question 2

What is the purpose of the SBOGs?

Answer 2

To act as a backup source of AC power to be used in the event that the EDGs fail, and battery backup power is then energizing an emergency shutdown evolution in the affected Unit

Question 3

What defines a ‘Blackout’?

Answer 3

The loss of off-site AC power (LOOP) and the failure to start both EDGs in a single PVNGS unit

Question 4

In the event of a blackout, what system provides power until the SBOGs are brought online?

Answer 4

Class Battery System

Question 5

What backup is available to the SBOGs? Can we take credit for it?

Answer 5

Cross-tying class 4.16 kV buses Unit to Unit through the switchyard
The NRC requirements for a backup AC power source do not allow us to take credit for this backup

Question 6

What are the three main components of a Gas Turbine?

Answer 6

Compressor
Combustor
Turbine

Question 7

How many fuel injectors are in the combustion chamber of the Gas Turbine?

Answer 7

12

Question 8

What two services does the compressed air of the Gas Turbines serve?

Answer 8

20% to supply combustion air

80% to cool the turbine blades

Question 9

What physically spins the turbine of the Gas Turbine?

Answer 9

Hot Exhaust gases from the combustion process