P75 - Div 1/2 Diesels Flashcards
What’s the maximum load for the diesel unless necessary for safe plant conditions?
5740 kw
What’s the maximum load for break-in following a ring replacement?
7000 kw
What’s the starting air pressure lowering logic?
220 - psig motor driven compressor starts
200 psig - low starting air alarm
160 psig - tech spec limit
120 psig - auto start not available alarm
50 psig - low control air pressure alarm
40 psig - diesel trip
What is the power supply for the jacket water heater and pump? (ESF or BOP)
BOP
what is the purpose of the jacket water heater and pump?
maintain jacket water approximately 160 deg F when diesel in standby
Where should the crane be stored in the diesel room?
What should happen if it’s not stored there and why?
West
INOP the diesel due to seismic concerns
What should the CRO do if a fire is detected in the Diesel room?
stop the fans in the room with the fire, and
start the fans in all rooms not affected
What temp does the outside air fan maintain the room at?
<120 degrees F
What trips are in for a DIV 1 or 2 Local/Emergency start?
Overspeed
All electrical
“OverAlls”
How many starting air trains are there for the diesels and how many times can each train start the diesel?
2 trains, 5 times each from 160 psig
What trips are in for a LOP/BUV?
Differential
Overcurrent with voltage restraint
Generator ground overcurrent
All mechanical
“DOG-All”
What trips are in for a LOCA?
Generator differential and overspeed
***Where is the generator differential sensed from?
At the generator, (Breaker must be closed to detect it)
How long after the diesel trip can it be restored?
Can this be overridden?
2 minutes
can be overridden with an emergency start or ECCS initiation
What pump is the primary supplier for fuel to the diesel engine?
Engine driven fuel oil pump
what is the power supply of the lube oil oil heater pump? (ESF or BOP)
BOP
What is the purpose of the lube oil heater pump?
Prelubes essential diesel parts and maintains lube oil approximately 170 deg F while in standby
How long do starting solenoids stay energized?
Until engine speed >200 rpm
When is flash field energized?
> 200 rpm
What is the power supply for the flash field?
11DA, 11DB
What is the tech spec limit for the fuel oil day tank?
220 gallons for 30 minutes @ max load post-LOCA
What is the purpose of the fuel oil drip return pump?
Pumps excess fuel in the drip tank back to the day tank
What is the power supply to the fuel oil drip return pump? (ESF or BOP)
BOP
What happens if the fuel oil drip return pump fails?
Fuel oil is routed to the diesel oily waste sump
How long can the diesel run without adding additional water to the jacket water standpipe?
30 days
What must you perform after diesel output breaker is racked out and back in?
Run diesel with breaker closed synced to the grid
How does diesel start for LOCA?
attempts to start continuously until 120 psig
How does diesel start for BUV signal?
5 seconds, regardless of air pressure. Then it must be reset
What is the power supply to the fuel oil transfer pumps? (ESF or BOP)
ESF
What are the generator electrical trips?
“RULOGG”
Reverse power Underfrequency Loss of excitation Overcurrent with ground restraint Ground overcurrent Generator differential
What are the diesel mechanical trips?
Low lube oil pressure ———————–30 psig
Low turbo oil pressure ———————-15 psig
Low control air pressure ——————-40 psig
High lube oil temp —————————-200 deg F
High bearing temp —————————228 deg F
High jacket water temp ——————–200 deg F
High crankcase pressure ——————3 psig
High engine vibration ————————12 mils
Engine overspeed —————————–517.5 rpm
What level does fuel oil transfer pump start and stop?
34” - 41”
Auto start and stops of motor driven air compressor for Div 1 and 2 diesels?
On - 220 psig
Off - 245 psig
What is the power supply to the motor driven air compressors for div 1 and 2 diesels? (ESF or BOP)
BOP
What are the above the line requirements?
Stored diesel fuel oil, lube oil, and air shall be within required limits
What’s the tech spec numbers?
3.8.3
Can each diesel have separate LCO logs for the concerns?
Yes
What is the tech spec limit for diesel fuel oil level?
9.6 feet or 68,744 gallons
How long can diesel run at the tech spec imit?
7 days
What is the power supply to the motor driven fuel oil
booster pump? (AC or DC)
DC
When does the motor driven fuel oil pump auto start?
When HS in Auto,
Pump starts on a 1.5 second time delay when:
the Engine driven fuel oil pump discharge pressure decreases to 10 psig, AND
engine control air pressure is >45 psig.
What is the tech spec level for the jacket water standpipe?
146”
When will the motor driven jacket water pump auto start?
stop?
Engine speed > 425 rpm and pressure < 15 psig
stops > 70 psig
What is the power supply to the motor driven Lube Oil pump (AC or DC)
DC
When will the motor driven lube oil pump auto start?
Engine > 425 rpm and pressure < 30 psig (after 5 second time delay)
When will the motor driven lube oil pump trip?
Pressure > 110 psig
