Term
|
Definition
- Overspeed >1025 RPM
- LO press <17psig when >80 rpm
- 86 HP
- Water level lo/press low
All are immediate trips |
|
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Term
|
Definition
- Crank case press (immediate trip)
- JW temperature
- 86 HBU
- Lube oil temp
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|
|
Term
| Normal power supplies for 32-1Z |
|
Definition
|
|
Term
| Alternate power supply for 32-1Z |
|
Definition
|
|
Term
| What engine driven pumps does the SBO have? |
|
Definition
- 2 cooling water pumps
- 3 lube oil pumps:
- Main press pump (all but pistons)
- Scavenging pump (suction to other pumps)
- Piston Cooling pump (pistons)
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|
|
Term
| How long should it take to fully load the SBO? |
|
Definition
|
|
Term
| When is SBO excitation supplied? |
|
Definition
| 870 RPM (when the voltage regulator is energized) |
|
|
Term
| How long and at what RPM is the SBO warmup period? |
|
Definition
|
|
Term
| What causes an SBO start failure? |
|
Definition
| SBO fails to reach 80 rpm in 5 seconds |
|
|
Term
| What is the concern with running the SBO unloaded? |
|
Definition
Excessive oil escaping past piston rings into the combustion chamber will accumulate in the exhaust system
|
|
|
Term
| What must be done if the SBO is maintained at idle speed for 8 hours or more? |
|
Definition
| must run loaded at >40% for at least 40 minutes |
|
|
Term
| Following a loss of offsite power, why does the SBO get started? |
|
Definition
|
|
Term
| Why must 34C or 34D be re-energized within an hour following a station blackout? |
|
Definition
| Reenergizing a bus within an hour is a commitment Dominion has made with the NRC |
|
|
Term
| Explain the cooling water flowpath for the SBO |
|
Definition
Two engine driven pumps supply cooling water to the cylinder jackets and the turbocharger aftercoolers.
it then goes through a 3-way temperature control valve to a fan cooled water to air heat exchanger
then to the lube oil cooler and back to the pump suctions |
|
|
Term
| Following a station blackout, what is the power source for the SBO computer system? |
|
Definition
| UPS internal backup battery |
|
|
Term
| What does the SBO UPS supply? |
|
Definition
- SBO computer
- SBO alarm panel
- One inlet vent louver
- One outlet vent louver
|
|
|
Term
| What are the SBO stby systems? |
|
Definition
- Circ oil pump
- AC turbo pump
- DC turbo pump
|
|
|
Term
| How do you normally shutdown the SBO? |
|
Definition
- Unload and open the output bkr
- Ramp engine to 450 rpm
- idle for 15 minutes for cooldown
- shutdown the engine
|
|
|
Term
| What happens on an SBO immediate shutdown? |
|
Definition
- Trips generator bkr and trips overspeed latch, this causes engine lockout
- 15 min cooldown relay is energized, BUT the engine will shutdown
- If restarted w/in 15 minutes, engine will shutdown after 15 minutes
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