U1 Seal Oil Flashcards
What normally supplies U1 Seal Oil to the Generator?
The Main Seal Oil Pump (MSOP) at 130#
When will the Emergency Seal Oil Pump (ESOP) auto start?
MSOP disch pressure less than 125 psig
What are the U1 Seal Oil supplies in order with pressures?
- MSOP (130#)
- ESOP (125#)
- Shaft Driven Oil Pmp (120#)
- Bearing Oil Header (25#)
When will the Vacuum Pump trip on U1 Seal Oil Tank?
High Level in the tank
Will the Vacuum Pump on U1 Seal Oil Tank restart once High Level Alarm is clear?
Yes
What does the U1 Seal Oil Recirc Pump do?
Recirs the contents of the seal oil tank to retard foaming and aid in removing non condensables and H2
What cools U1 Seal oil?
Bearing Oil Header
What is the makeup to U1 Seal oil?
Bearing Oil Header
What pressure do we keep the U1 Seal Oil at and why?
8 psig greater than Gen H2 pressure to prevent H2 from leaking out
Where does the MSOP get its suction from?
U1 Seal Oil Vacuum Tank
Where does the ESOP get its suction from?
Bearing Oil Header (normal)
What RPM must the turbine be spinning to allow use of the Shaft Driven Oil Pump as a supply source?
Greater than 1300 rpm
What is the purpose for having U1 Vacuum Tank Nozzles?
- Reduces foaming
- Aids in degassing Seal Oil
What is the effect on Unit 1 Seal Oil if the Bearing Oil Header is lost?
No Cooling and No makeup
How is level maintained in H2 Drain Path for U-1 Seal Oil?
Level is maintained in the H2 seal drain enlargement by the float trap
