Unit 2 Lube Oil

Question 1

How does NESW interact with the unit 2 main turbine lube oil system?

Answer 1

It cools lube oil coolers are in tank.

Question 2

How does turbine lubricating oil cleanup system, interact with the unit 2 main turbine lube oil system?

Answer 2

Oil filters are installed in the 
supply lines of the following:
Thrust bearing,
Bearing oil lift pumps,
Turning gear,
Control oil.

Question 3

What will auto start an Auxiliary lube oil pump?

Answer 3

Low lube oil pressure 7#.

Turbine trip.

Question 4

What will auto start an DC Emergency lube oil pump?

Answer 4

Low lube oil pressure 7#.

Turbine trip.

Question 5

What will auto start an Bearing lift oil pump?

Answer 5

Turbine trip.

Question 6

What are the interlocks associated with the Bearing lift pumps?

Answer 6

Auto start on turbine trip.

Trip on 5#

Question 7

What are the interlocks associated with NESW Cooling to the lube oil coolers?

Answer 7

Isolates on a load conservation signal.

Must be manually reset to initiate flow.

Question 8

What is the purpose of the U 2 lube oil system.

Answer 8

Lubricant bearings on the Turbine, Generator, and the Exciter and remove frictional heat.

Question 9

What are the filter indications?

Answer 9

When three or four groves are visible the filter needs clean. When five groves are visible it is internally bypassed.

Question 10

How does generator seal oil interact with the unit 2 main turbine lube oil system?

Answer 10

It’s the suction source for the air oil pumps.