EDG AUX

Question 1

What happens to the EDG ventilation system when outside air temp is < 45°?

Answer 1

Tempering dampers open to stop drawing in cold outside air

Question 2

When do the EDG Supply and Exhaust fans stop?

Answer 2

• Stop 30 min after EDG shutdown
• 70°F Room Temp
• On acutation of CO2

Question 3

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

Answer 3

Solenoid opens every 4 hours for 2 min

Question 4

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

Answer 4

Immediately on the start of the EDG

Question 5

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

Answer 5

8 min after an EDG is shutdown/tripped

Question 6

What provides fuel to the EDG while its running?

Answer 6

Shaft Driven Fuel Oil Pump

Question 7

When is the field flash disabled?

Answer 7

80% speed during a fast start

Question 8

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

Answer 8

Ctrl Air

Question 9

When does the supply fan for the EDG Auto start?

Answer 9

• 20 Sec after an EDG start
• 95°F Room Temp

Question 10

When does the exhaust fan for the EDG Auto start?

Answer 10

• EDG start
• 95°F Room Temp

Question 11

What is the minimum required level of each Fuel Oil Storage Tank?

Answer 11

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

Question 12

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

Answer 12

101.4 gal

(15 minutes worth run time at full load)

Question 13

What are the designed temp bases for the EDG room?

Answer 13

< 104°F in standby
< 130°F running

Question 14

When does the Stby EDG JW Pump auto start?

Answer 14

Low # (16 psig)

10 sec time delay

Question 15

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

Answer 15

145°F

Question 16

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 …

Answer 16

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.

Question 17

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

Answer 17

Fails to allow full flow through the EDG air aftercooler

Question 18

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

Answer 18

Demin water

Question 19

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

Answer 19

ESW

Question 20

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

Answer 20

No. The B and A Pump capacity is insufficient for continued EDG operation.

Question 21

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

Answer 21

Open

Question 22

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

Answer 22

only 1 starting air valve is needed and 1 receiver

Starting air lines and receivers are x-tied

Question 23

Do both starting air valves open on a diesel start?

Answer 23

Yes

Question 24

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

Answer 24

Jacket Water

Question 25

Are the fuel oil transfer pumps designed for a staggered start based on day tank level?

Answer 25

NO! Both pumps are designed to start at the same level.

Question 26

What auxiliary EDG items are supported/cooled by ESW?

Answer 26

Jacket Water
Lube Oil
Intake Air After Coolers
Emergency Makeup to Jacket Water

Question 27

What is the purpose of the before and after pump?

Answer 27

Maintains positive oil pressure until Engine-Driven takes over operation

Question 28

Is EDG Operability affected by a Failure of Shaft Driven LO Pump?

Answer 28

YES! INOPERABLE