Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
29 Cards in this Set
- Front
- Back
|
A loss of hydraulics (loss of accumulator hydraulic pressure) causes the fuel racks to move to what position?. |
A loss of air pressure will extend the fuel racks closed. Signal is in for 2 minutes when EDG is shutdown to ensure EDG stops rolling. |
|
|
State the Diesel Trips (BIGCFLANGE) |
B - Bearing temperature high I - Incomplete start G - Generator phase differential C - CO2 actuation F - Fuel oil pressure low L - Lube oil pressure low A - Air chest pressure high N - Neutral overcurrent G - Generator overcurrent E - Electronic overspeed |
|
|
What three EDG trips are available during a SI with 250 VDC available? |
1. Generator phase differential 2. Generator overspeed 3. Manual push button |
|
|
What is the load shed sequencing without an SI? |
CCW - 3 seconds ESW - 7 seconds MDAFW - 11 seconds NESW - 15 seconds
|
|
|
What is the load shed sequencing with an SI? |
Charging - 3 seconds SI - 7 seconds RHR - 11 seconds CCW - 15 seconds ESW - 19 seconds MDAFW - 25 seconds CTS (with CTS signal) - 30 seconds NESW - 37 seconds |
|
|
What's unique about the EDG start relays? |
They must be de-energized to run. |
|
|
What position to the starting air valves (SAV) fail to on a loss of control air? |
Fail as-is - ensures an air path is available to the cylinder. |
|
|
The starting air receivers have enough air to start the EDG how many times while ensuring there is 100# air available for control air? |
2 |
|
|
The 1 AB EDG is running and connected to the T buses when 250 VDC is lost. What is the condition of the EDG? |
The EDG does not trip - SV-6 keeps air on the throttle control cylinder and bypasses the electronic trip schemes. |
|
|
With 250 VDC unavailable, what will trip the EDGs? |
1. Manually close the manual fuel valve. 2. Mechanical overspeed. |
|
|
During an EDG start at what percent speed will the Field Flash stop? |
80% |
|
|
What is the difference between losing field flash current prior to an EDG start as compared to if it was running? |
Loss of flash while running does nothing; loss of flash prior to start will likely result in failure to start (EDG is INOP) |
|
|
What condition(s) can cause Speed Droop in the EDG? |
EDG moves from “no load” to “full load” or attempts to carry too much load. |
|
|
What is different regarding pumps that are shed on a Load Shed with an SI signal in contrast to a Load Shed with a CTS signal? |
Load Shed + CTS will trip the NESW pumps |
|
|
What does a LIT Load Shed Ready light indicate and what is the position the EDG output breaker? |
Load Shed Relays have power and the output breaker is OPEN. |
|
|
What is the rated speed of the EDG? |
514 RPM |
|
|
What causes the ‘Incomplete Start’ annunciator to light? |
If the EDG fails to reach 95% of rated speed within 10 seconds of a Fast Start |
|
|
What will happen if an EMERGENCY start signal is generated when the EDG is in a SLOW start sequence? |
An emergency (FAST) start takes place |
|
|
How does the EDG turbocharger raise power output? |
Compressing more air into the cylinders raises the air/fuel mix. |
|
|
Which position will the Aftercooler Water Regulating Valves, WRV-721-728 fail? |
Full open |
|
|
How long can an EDG run with full load with only the volume of a FULL Fuel Oil Day Tank? |
About an hour and a half (87 min) |
|
|
What is the Tech Spec minimum volume for the Diesel Fuel Oil Storage tanks, and what is the basis for that volume? |
> 46,000 gallons. It allows full load operation for 7 days. |
|
|
How big a leak in the DJW surge tank would render the Diesel Generator INOPERABLE? |
> 3.7 GPM |
|
|
Which pumps circulate ESW through the diesel jacket when running and when shutdown? |
Running - DJW pumps; Shutdown – Aux Jacket Water pump |
|
|
How often are the Upper Valve Gear Solenoid valves open when the EDG is in Standby? |
Open for 2 minutes every 4 hours |
|
|
What is the Tech Spec minimum pressure for the Starting Air Receivers, and what is its basis? |
> 190 psig. One complete start. (FSAR requires 210 psig for 2 complete starts) |
|
|
What is the difference in FAIL position for the Starting Air Supply valves on a loss of control air vice a loss of power to its associated pilot solenoid valve? |
Loss of control air fails the valves “AS IS”; loss of power to the pilot solenoid will fail the valves CLOSED. |
|
|
What is the Tech Spec status of the EDG if its Alternate ESW supply to the Air Aftercoolers is OPEN? |
INOPERABLE (but available) |
|
|
What are the start and stop signals for the EDG Room Ventilation SUPPLY fans? |
Start: 20 seconds after EDG start, or room temp > 95° F; Stop: 30 minutes after EDG stop, or CO2 actuation, or room temp < 70° F |
