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Flashcards in TLO Deck (20):
1

STATE the functions of the Lubricating Oil System.

Supplies Lube Oil to the turbine generator bearings for cooling and lubrication.
Turbine Generator Journal bearings
Thrust bearing
Also supplies lube oil to:
Turning Gear Mechanism
Thrust bearing wear device
Low speed switch
Mechanical Turbine Trip Solenoid
Oil Reset solenoid valve
Generator Seal Oil System

2

STATE the function of the following Lubricating Oil System component:
LO storage tank

• Contains a reserve supply of oil for use in the LO and SGFP LO systems
• Capacity is 18,000 gallons-equal to all reservoirs, conditioners and piping with a 3,000 gallon reserve.

3

STATE the function of the following Lubricating Oil System component:
LO conditioner

• Purifies, heats and transfers lube oil
• Capacity of 1570 gph
• Removes particles > 5 microns and water via a centrifugal process.

4

STATE the function of the following Lubricating Oil System component:
LO reservoir

 Supply and collection point for oil in the system
 Houses system components such as:
– Oil coolers
– Turning Gear Oil Pump (TGOP)
– Emergency Bearing Oil Pump (EBOP)
– Motor Suction Pump (MSP)
– Booster Pump
– Reservoir Vapor Extractor

5

STATE the function of the following Lubricating Oil System component:
vapor extractor

• Removes H2 gasses, moisture and air from the oil reservoir

6

STATE the function of the following Lubricating Oil System component:
shaft driven main oil pump

• Supplies turbine bearings and booster pump with turbine at 1800 rpm.
• Provides auto turbine trip if discharge pressure drops to 100 psig on 2/3 pressure switches AND the turbine is >75% rated speed (2/3 speed switches -1350 rpm)

7

STATE the function of the following Lubricating Oil System component:
booster pump

• Supplies oil to the suction of the Main Oil Pump
• Booster Pump provides 15 -25 psig suction for the shaft-driven main oil pump during normal operation

8

STATE the function of the following Lubricating Oil System component:
motor suction oil pump

• Utilized as a backup to the booster pump in case of failure during normal ops.
• Also used during startup, shutdown and low speed ops to supplement the booster pump

9

STATE the function of the following Lubricating Oil System component:
turning gear oil pump

• Supplies a backup source of bearing oil pressure if the main oil pump fails.
• Supplies the suction of the lift pumps for turbine startup and trip

10

STATE the function of the following Lubricating Oil System component:
emergency bearing oil pump

• Supplies an emergency oil supply if the main and turning gear oil pumps fail OR a loss of AC power occurs

11

STATE the function of the following Lubricating Oil System component:
LO coolers

• Remove heat and maintain 110-120 ºF Lube Oil

12

STATE the function of the following Lubricating Oil System component:
bearing lift pumps

 Lift Rotor when stopped or turning slowly

13

DESCRIBE why the lubricating oil supply pipe is located inside the return piping

The supply line is inside the return line to minimize the effects of a leak and the resultant fire hazard

14

DESCRIBE the indications that exist when a lube oil conditioner is primed

• When Water Is Seen at Heavy Phase Discharge Port, Purifier Is Primed

15

DESCRIBE the term "Breakover" in a lube oil conditioner

BREAKOVER occurs when oil exits the LO Conditioner from the heavy phase discharge to a drain.

16

DEFINE emulsification as it applies to oil

• Mixing of oil and water into a homogenous mixture

17

DESCRIBE why the vapor extractor is operated when the oil system is operating or being filled, but should be shutdown when the oil system is shutdown

• Removes H2 gasses, moisture and air from the oil reservoir
• The fan is shutdown when the LO system is not in operation to prevent dirt and air from being sucked through the turbine bearings

18

DESCRIBE how the bearing oil header pressure is regulated and STATE its normal operating pressure

The combination of inlet bypass valve, inlet valve and pump turbine reduces pressure to <100 psig
A pressure regulating bearing oil relief valve further reduces pressure to 25 psig

19

DESCRIBE the purpose and operation of each of the two handwheels on the lube oil cooler transfer valve

The top handwheel is used to position the plug valve to the in-service cooler
The Hammer-Blow handwheel is used to lift the valve plug off its seat prior to rotating the upper handwheel. It is also used to seat the valve plug after manipulation

20

DESCRIBE the purpose of and the system design features that support the following:
– turbine lift pump test
– automatic start test for each lubricating oil pump
– Emergency Bearing Oil Pump (EBOP) monthly test

– turbine lift pump test
Performed monthly
Verifying that pumps start on low pressure and that they develop adequate discharge pressure >325 psig
– automatic start test for each lubricating oil pump
Testing the Motor Suction pump 10# auto start feature
– Emergency Bearing Oil Pump (EBOP) monthly test
Testing the EBOP Auto starts for:
1)