NA (Non Class 13.8kV AC) Flashcards
The plant is at 100% power. An area operator discovers the white light on 1E-NAN-S01J, Circulating Water Pump CWN-P01A is out. Circulating Water Pump CWN-P01A is running. After replacing the bulb, the light is still out. There are no other abnormal conditions at the breaker. Which one of the following describes the condition of the breaker?
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A. The closing spring is not charged.
B. The lockout relay circuit is reset.
C. The closing spring has actuated.
D. The lockout relay circuit is disabled.
Answer: D
During a Loss of Offsite Power (LOOP), the operating crew is directed to startup a Gas Turbine Generator (GTG) within 1 hour and energize NAN-S07. Assuming that each unit is being supplied by their own diesel generators, is this step still necessary, and why or why not?
A. Yes, this step is necessary to augment the DGs, enabling one unit to startup if necessary.
B. Yes, this step ensures that the GTG batteries and HVAC equipment have power.
C. No, this step can be omitted if at least one DG is operating on each unit.
D. No, this is only performed if there is thunderstorm activity in the “vicinity.”
Answer: B
Why is it important for the operating crew to energize the switchyard loads from the Gas Turbine Generators during a Loss of Offsite Power (LOOP)?
A. Restores control power NAN-S05 and NAN-S06.
B. Ensures that switchyard breaker operation will be possible.
C. Restores the normal power supply to the security lighting system.
D. Ensures that a minimum load is placed on the GTGs allowing the generators to burn their fuel completely.
Answer: B
Which ONE of the following Unit combinations can be simultaneously energized by the GTGs?
A. 1 and 3 only
B. 1 and 2; or 1 and 3
C. 1 and 2; or 2 and 3
D. 1 and 3; or 2 and 3
Answer: B
