FD - Diesel Generator Engine Fuel Oil System

What TS are affected by the FD system?

1. 3.8.3A - FD inventory <77,100 gal and >66,100 gal ---- Restore fuel oil level to within limits [48 hours] 2. 3.8.3C - One or more DGs with stored fuel oil total particulates not within limit ---- Restore to within limits [7 days] 3. 3.8.3D - One or more DGs with new fuel oil properties not within limits ---- Restore to within limits [30 days] 4. 3.8.3.F - FD inventory <66,100 gal ---- Declare associated DG inoperable [Immediately]

What will cause an automatic trip of the FD recirc pump

1. When the diesel reaches 95% speed and voltage manually or automatically 2. When either diesel receives a Sequencer start signal (independent of 1) 3. Any storage tank level < TS warning level (84.28%; can be bypassed)

How long are FD Storage Tanks normally recirculated for?

24 hours

During a Design Bases Event, if offsite power is lost, how long will the fuel oil in the FD storage tanks last?

7 DAYS

Which of the following is correct concerning loss of power to the D/G Eng Fuel Oil Day Tank Fill Valve? 1) The valve fails ___(1)___. 2) Day tank level will be maintained by manually ______(2)_____. A. 1) closed 2) operating the D/G Eng Fuel Oil Day Tank Fill Valve Bypass. B. 1) open 2) operating the D/G Eng Fuel Oil Day Tank Fill Valve C. 1) closed 2) operating the D/G Eng Fuel Oil Day Tank Fill Valve. D. 1) open 2) operating the D/G Eng Fuel Oil Day Tank Fill Valve Bypass.

A. 1) closed 2) operating the D/G Eng Fuel Oil Day Tank Fill Valve Bypass.

What level is maintained automatically by the FD Day Tank fill valve?

At 70" (2.09 psig) the Fill Valve Opens At 79" (2.38 psig) the Fill Valve Closes

What combination of filters and polishers is normally in service with a FD Storage tank on recirc?

Both filters are in service but the Polisher is not. It removes chemical additives that would have to be added back in later

During a Design Bases Event, if offsite power is lost, the D/Gs will: Have enough fuel oil in the FD storage tanks to last _(1)_ day(s). Direct fuel oil that is pumped to the supply header on each side of the D/G, but not used, to the _(2)_ A. (1) one (2) day tank B. (1) one (2) transfer pump suction C. (1) seven (2) day tank D. (1) seven (2) transfer pump suction

C. (1) seven (2) day tank

How will a loss of 1ERPA affect the Unit 1FD system? A. The D/G Eng Fuel Oil Day Tank Fill Valve will fail OPEN and the FD storage tank recirculation pump will trip if running. B. The D/G Eng Fuel Oil Day Tank Fill Valve will fail OPEN and the FD storage tank recirculation pump will remain on if running. C. The D/G Eng Fuel Oil Day Tank Fill Valve will fail CLOSED and the FD storage tank recirculation pump will trip if running. D. The D/G Eng Fuel Oil Day Tank Fill Valve will fail CLOSED and the FD storage tank recirculation pump will remain on if running.

D. The D/G Eng Fuel Oil Day Tank Fill Valve will fail CLOSED and the FD storage tank recirculation pump will remain on if running.

What is the power supply to the Motor Driven FD Booster Pump?

DGDA(B). Only used for maintenance

Who decides when to use the FD recirculation system Polishing filter?

ENGINEERING

What is the power supply to the FD Day Tank Fill Valve?

ERPA(D)

How will a D/G start affect the FD system pumps?

FD Recirc Pump will trip. FD Engine Driven pump will operate to provide fuel to the D/G from the day tank.

How does the FD Day Tank Fill Valve fail on a loss of power? Why?

Fails closed. Prevents a fire hazard caused by filling the day tank all the way to its vent

When filling an FD storage tank, when should the level gauge be continuously monitored and why?

If total calculated volume (tanker plus storage tank) is >96%, the level gauge shall be continuously monitored to prevent overfill

What is the power supply to the FD recirc pump?

MXC

How many FD storage tanks can be filled at a time?

Only one

What is the operational capacity of the DG daytank (I don't care about the volume)?

Sufficient to operate the DG for at least 60 minutes at full load (619 gallons total, 417 (1.96 psig) gallons minimum)

Which valve is manipulated first when shifting in-service FD Storage Tanks?

The in-service FD Tank's outlet valve is closed and then the out of service FD Tank's outlet valve is opened

What is the purpose of the FD system?

To store and supply fuel to the DG engines for no less than 7 days operation

Where is unburned fuel directed?

Unburned fuel from the drip headers is directed to the FD Day Tank