FW Pump / Turbine Lube Oil

Question 0

What does the high pressure (2nd stage) lube oil do?

Answer 0

Supplies the oil to the governor system (HP and LP stop and control valves)
FW pump trip relay.

Question 1

What is the purpose of the FW pump/Turbine lube oil system?

Answer 1

Provides lube oil to the FW pump and turbine bearings

Supplies control oil for the FW pump turbine control system

Question 2

What happens to the lo flow on loss of AC power?

Answer 2

Flow is bypassed around the oil coolers and filters directly to the bearings.

Question 3

What is the owner source for the lo pumps?

Answer 3

NH

Question 4

Describe the emergency lo pump.

Answer 4

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One low pressure discharge line
Supplies bearing lube only 
Lubes for coast down only. 
Starts automatically on low lube oil pressure.

Question 5

What cools the FW pump/turbine lube oil system coolers?

Answer 5

Turbine cooling.

Question 6

What happens if lo to one feed pump is lost?

Answer 6

Rx power cutback occurs to the level where one pump can maintain.

Question 7

What happens if lo is lost to both feed pumps?

Answer 7

Rx trip occurs and aux feed will maintain SGs

Question 8

What happens to the plant with a loss of turbine cooling

Answer 8

Plant shuts down and feed pumps stopped.