EDG's

Question 1

What are the trips of the EDG’s during normal operation?

Answer 1

“BIG C FLANGE” and Manual

1. Bearing temperature high.
2. Incomplete start.
3. Generator over current.
4. Cardox actuated.
5. Fuel Oil extreme lower pressure.
6. Lube oil lower pressure.
7. Air chest pressure high.
8. Neutral ground over current.
9. Generator phase differential.
10. Electric over speed.
11. Manual.

Question 2

What are the trips of the EDG’s during an emergency conditions?

Answer 2

“GEMI”

1. Generator phase difference.
2. Electrical over speed (110%).
3. Manual push buttons in the CR and the EDG room.
4. Incomplete start.

Question 3

What is the Tech. Spec. minimum level for the EDG Fuel oil day tank?

Answer 3

.101.4gal indicated = 70gal usable. This gives the diesel enough fuel to start and power the electric fuel pumps to start supplying the diesel.

Question 4

What is the Tech. Spec. minimum level for the EDG Fuel oil storage tank?

Answer 4

.46,000gal. This gives one diesel enough fuel to run for 7 days at full load.

Question 5

When is the Worthington stop control knob available?

Answer 5

Only on loss of DC.

Question 6

What is the purpose of the EDG’s?

Answer 6

To supply an independent automatic emergency source of power to safeguard busses if normal and reserve power is lost.

Question 7

What happens if you have the EDG’s in standby and you suffer a load shed followed by an SI?

Answer 7

A load shed occurs.
EDG starts and the feeder breaker from the RCP bus to the T-bus opens.
When the EDG reaches 95% speed and 80% voltage, the EDG output breaker closes.
The load shed clears and loads sequence on: CCW,
ESW, Motor Driven Aux Feed Pump, and NESW

SI occurs
Load conservation occurs (pumps already started trip)
ECCS pumps start: CCPs, SI, RHR as well as CCW, ESW, AFW, NESW
If a Containment spray signal exists the NESW pp. would trip and the CTS pp. would start.

Question 8

What happens if you have the EDG’s in standby and you suffer a loss of power to the safety buses?

Answer 8

A load shed occurs.
EDG starts and the feeder breaker from the RCP bus to the T-bus opens.
When the EDG reaches 95% speed and 80% voltage, the EDG output breaker closes.
The load shed clears and loads sequence on: CCW, ESW, Motor Driven Aux Feed Pump, and NESW.

Question 9

How quickly does an EDG come up to speed and voltage during an emergency?

Answer 9

10sec.

Question 10

When is the Worthington start control knob available?

Answer 10

Anytime.

Question 11

When is the mechanical over speed trip available?

Answer 11

Only on loss of DC.

Question 12

What does ESW do for the EDG’s?

Answer 12

First cools the Air after coolers then the water flows through the lube oil coolers, then the water flows through the jacket water coolers.

Question 13

What is the locations of the EDG fuel oil storage tanks?

Answer 13

CD north east of the unit 1 track bay.

AB south of unit 2 track bay.

Question 14

What is the output of a EDG?

Answer 14

3500kw AC.

Question 15

What are the auto starts of the EDG’s?

Answer 15

Load shed.

SI.

Question 16

If you are running a EDG loaded to the buss for a surveillance, what happens if you receive a SI signal?

Answer 16

The output breaker for the EDG trips open.

Question 17

How can you stop an EDG if you suffer a loss of DC power?

Answer 17

1. Manual pull button on Worthington control module.

2. Mechanical over speed (112%).

Question 18

With the EDG modified for NFPA 805 what trips are available?

Answer 18

1. Manual pull button on Worthington control module.

2. Mechanical over speed (112%).

Question 19

Why do we blow down the petcocks on the EDG before we run it?

Answer 19

To remove any oil or water that has collected in the cylinders.

Question 20

What is the minimum Tech. Spec. level for the EDG lube oil tank?

Answer 20

500gal. standby.

300gal. running.

Question 21

What do you look at on the EDG’s on tour?

Answer 21

If you don’t know this you are stupid!!!!!!