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4703 > EDG Auxiliaries > Flashcards

EDG Auxiliaries Flashcards

1
Q

When does the EDG Crankcase Breather start?

A
  • Starts on EDG run signal
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2
Q

What happens to the EDG Vent sys when outside air temp is < 45°?

A
  • tempering dampers open to stop drawing in cold outside air
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3
Q

What does the Tornado Damper do?

A
  • prevents a tornado from collapsing the room (act as a check valve)
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4
Q

At what temp do the EDG fans start?

A
  • 95°F Room Temp
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5
Q

When do the EDG Supply and Exhaust fans stop?

A
  • Stop 30 min after EDG shutdown
  • 70°F Room Temp,
    OR
  • on a CO2 actuation
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6
Q

How often does the gear lube oil ctrl valve open while the EDG is in stby?

A
  • Solenoid opens every 4 hours for 2 min
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7
Q

When do the gear lube oil ctrl valves open when the EDG is started?

A
  • Open immediately on the start of the EDG
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8
Q

When do the gear lube oil ctrl valves close after the EDG is shutdown?

A
  • 8 min after an EDG is shutdown/tripped
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9
Q

What provides fuel to the EDG while its running?

A
  • The Shaft Driven Fuel Oil Pump
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10
Q

When is the field flash disabled?

A
  • @ 80% speed during a fast start
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11
Q

What must the Throttle Control Cylinder have to be able to open?

A
  • Ctrl Air
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12
Q

How do the starting air valves fail?

A
  • As is
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13
Q

When does the supply fan for the EDG Auto start?

A
  • 20 Sec after Exhaust Fan on Start of EDG

- 95°F Room Temp

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14
Q

When does the exhaust fan for the EDG Auto start?

A
  • Auto starts on EDG start
    or
  • 95°F Room Temp
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15
Q

How much lube oil supply can the EDG Shaft Driven Pump supply?

A
  • 100% of the lube oil flow while the EDG is running
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16
Q

What is the minimum Lvl of fuel oil in the fuel oil storage tank required for a EDG?

A

≥ 46,000 gal to supply 1 EDG for 7 days at full load per LCO 3.8.3

17
Q

What is the minimum level in the Fuel Oil Day Tank per SR 3.8.1.4?

A
  • 101.4 gal (15 minutes worth run time at full load)
18
Q

What are the designed temp bases for the EDG room?

A

< 104°F in standby

< 130°F running

19
Q

When does the Stby EDG JW Pump auto start?

A
  • starts on low # (16 psig)
20
Q

What temp does the EDG Aux Jacket Water Heater maintain the EDG Jacket Water at?

A
  • 145°F
21
Q

What loads are on the EDG Inverter?

A
  • Field Flash
  • Bearing Temp Recorder
  • Local/Remote Relays
  • Dynalco Speed Sensor
22
Q

Unit 1 is at 100% power. A relief valve has failed open on 1AB Emergency Diesel Generator
Starting Air Receiver #1. The associated starting air compressor has tripped off.
Which one of the following correctly describes the response of 1AB Emergency Diesel
Generator if a start signal occurs before any operator action?
The EDG will …

A
  • start in the normal time from #2 Starting Air Receiver but only one starting air valve will
    supply all of the cylinders with starting air pressure.
23
Q

Upon a loss of control air, EDG air aftercooler regulating valves fail to what position?

A
  • Fails to allow full flow through the EDG air aftercooler
24
Q

What is the makeup water to the EDG JW surge tank?

A
  • Demin water
25
Q

What is the time delay for the stby JW pump on an EDG start and what is it looking for in that time frame?

A
  • 10 sec time delay if discharge # is < 16#
26
Q

What is the Emergency Backup source of water to the EDG Jacket Water Sys?

A
  • ESW
27
Q

What will give you a DG Valve Gear Lube Oil Failure Alarm?

A
  • if the upper valve gear pressure does not reach 5# within 45 seconds of solenoid valve opening
28
Q

Can the before and after pump supply the EDG while its running if the Shaft Driven oil Pump fails?

A
  • No, Before and After Pump capacity is insufficient for continued EDG operation.
29
Q

EDG Valve Gear Lube Oil valves fail how on a loss of Ctrl Pwr?

A
  • Fail Open
30
Q

What does SR 3.8.1.6 say about an air receiver?

A
  • SR 3.8.1.6 Verify each required DG air start receiver pressure is ≥ 190# and are only good for 1 start per receiver to be considered operable
31
Q

Starting Air Valves fail how on a loss of ctrl air?

A
  • Fail as is
32
Q

If you have a loss of ctrl air, can you run a EDG?

A
  • No, it will not start
33
Q

How many starting air valves do you need to start a diesel?

A
  • only 1 starting air valve is needed and 1 receiver. The starting air lines and are receivers are x-tied to provide this option.
34
Q

Do both starting air valves open on a diesel start?

A
  • Yes, both valves open on a start
35
Q

What ventilation is required by T.S. L.C.O 3.8.1?

A

Both EDGs require the supply fan, the exhaust fan and the cabinet fan for an EDG to be operable or LCO 3.8.1 action statement entered.

36
Q

What are the only EDG Trips available when the EDG is in modified operation?

A
  • Mech Overspeed (112%) (514 rpm normal speed)

- Worthington Ctrl Module

37
Q

What is the cooling supply to the EDG Woodward Electronic Governor?

A

Jacket Water

38
Q

How will the EDG Fuel oil pumps fill the day tank?

A
  • BOTH AB fuel oil pumps fill the day tank
39
Q

Will a loss of both starting air compressors prevent a start of the EDG during a LOOP?

A

No, EDG can start with both Starting air compressors out of service

4703 (11 decks)

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