EDG AUX Flashcards
What happens to the EDG ventilation system when outside air temp is < 45°?
Tempering dampers open to stop drawing in cold outside air
When do the EDG Supply and Exhaust fans stop?
- Stop 30 min after EDG shutdown
- 70°F Room Temp
- On acutation of CO2
How often does the gear lube oil ctrl valve open while the EDG is in stby?
Solenoid opens every 4 hours for 2 min
When do the gear lube oil ctrl valves open when the EDG is started?
Immediately on the start of the EDG
When do the gear lube oil ctrl valves close after the EDG is shutdown?
8 min after an EDG is shutdown/tripped
What provides fuel to the EDG while its running?
Shaft Driven Fuel Oil Pump
When is the field flash disabled?
80% speed during a fast start
What must the Throttle Control Cylinder have to be able to open?
Ctrl Air
When does the supply fan for the EDG Auto start?
- 20 Sec after an EDG start
- 95°F Room Temp
When does the exhaust fan for the EDG Auto start?
- EDG start
- 95°F Room Temp
What is the minimum required level of each Fuel Oil Storage Tank?
≥ 46,000 gal to supply 1 EDG for 7 days at full load per LCO 3.8.3
What is the minimum level in the Fuel Oil Day Tank per SR 3.8.1.4?
101.4 gal
(15 minutes worth run time at full load)
What are the designed temp bases for the EDG room?
< 104°F in standby
< 130°F running
When does the Stby EDG JW Pump auto start?
Low # (16 psig)
10 sec time delay
What temp does the EDG Aux Jacket Water Heater maintain the EDG Jacket Water at?
145°F
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. What is the response of 1AB Emergency DieselGenerator if a start signal occurs before any operator action? The EDG will …
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.
Upon a loss of control air, EDG air aftercooler regulating valves fail to what position?
Fails to allow full flow through the EDG air aftercooler
What is the makeup water to the EDG JW surge tank?
Demin water
What is the Emergency Backup source of water to the EDG Jacket Water System?
ESW
Can the before and after pump supply the EDG while its running if the Shaft Driven oil Pump fails?
No. The B and A Pump capacity is insufficient for continued EDG operation.
EDG Valve Gear Lube Oil valves fail how on a loss of Ctrl Pwr?
Open
How many starting air valves do you need to start a diesel?
only 1 starting air valve is needed and 1 receiver
Starting air lines and receivers are x-tied
Do both starting air valves open on a diesel start?
Yes
What is the cooling supply to the EDG Woodward Electronic Governor?
Jacket Water
Are the fuel oil transfer pumps designed for a staggered start based on day tank level?
NO! Both pumps are designed to start at the same level.
What auxiliary EDG items are supported/cooled by ESW?
Jacket Water
Lube Oil
Intake Air After Coolers
Emergency Makeup to Jacket Water
What is the purpose of the before and after pump?
Maintains positive oil pressure until Engine-Driven takes over operation
Is EDG Operability affected by a Failure of Shaft Driven LO Pump?
YES! INOPERABLE
