EHC

Question 1

Which one of the following turbine trips directly actuates the EHC Emergency Trip Solenoid Valve 20/ET? (Assume all trip functions perform as designed)
A. Low vacuum.
B. Reactor Trip.
C. Turbine No-load.
D. Thrust Bearing.

Answer 1

D. Thrust Bearing.

Question 2

Which ONE of the following describes the function of the Auto Stop Oil Interface
Valve?
A. Provides a backup oil supply to the Air Side Seal Oil System in the event of low
level in the Generator Loop Seal Drain Tank.
B. On an increasing auto stop oil pressure (greater than 45 psig) the interface valve
closes to admit operating air to the extraction steam bleeder trip valves.
C. On a decreasing auto stop oil pressure (less than 45 psig) the interface valve opens
to dump EHC fluid to drain thus closing the main turbine stop, governor, intercept,
and reheat stop valves.
D. On a main turbine speed increase to 103% the Auto Stop Oil Valve opens to drain
EHC fluid from the Intercept and Reheat Stop Valves to prevent a main turbine
overspeed condition.

Answer 2

C. On a decreasing auto stop oil pressure (less than 45 psig) the interface valve opens
to dump EHC fluid to drain thus closing the main turbine stop, governor, intercept,
and reheat stop valves.

Question 3

Which ONE of the following describes the function of the Auxiliary Governor Trip
Solenoid Valves (20-1/AG and 20-2/AG)?
A. Provides a backup for the 20 ET Emergency Trip Solenoid by providing an alternate
path for draining EHC fluid from the Main Turbine Stop, Governor, Intercept, and
Reheat Stop valves.
B. Provides a backup for the Auto Stop Oil trip by providing an alternate path for
draining EHC fluid from the Main Turbine Stop, Governor, Intercept, and Reheat
Stop valves.
C. Open when the main turbine speed increases to 103% to drain EHC fluid from the
Main Turbine Stop, Governor, Intercept, and Reheat Stop valves.
D. Open when the main turbine speed increases to 103% to drain EHC fluid from the Main Turbine Governor Valves and Intercept Valves to prevent a main turbine overspeed condition.

Answer 3

D. Open when the main turbine speed increases to 103% to drain EHC fluid from the Main Turbine Governor Valves and Intercept Valves to prevent a main turbine overspeed condition.

A. INCORRECT. 20 ET trips are direct EH fluid trips and do not have a backups.
The 20 ET trip solenoid is activated by a low Auto Stop Oil pressure (45 psig).
B. INCORRECT. Pressure switch in auto stop oil header (63-2 AST) low pressure
(45 psig) will cause the 20 ET solenoid to open therefore providing a backup to
the Auto Stop Oil trip as one of its functions.
C. INCORRECT. The 20-1/AG and 20-2/AG Aux Trip Solenoids drain the EHC oil
from ONLY the Main Turbine Governor and Intercept Valves.
D. CORRECT. The 20-1/AG and 20-2/AG Aux Trip Solenoids drain the EHC oil
from ONLY the Main Turbine Governor and Intercept Valves. When Turbine
speed is lowered, these valves close and allow the EHC oil pressure to build
back up allowing the Main Governor and Intercept valves to re-open.

Question 4

Which ONE of the following is the power supply to EHC Pump, P-19A?
A. MCC-1.
B. MCC-2.
C. MCC-3.
D. MCC-4.

Answer 4

C. MCC-3.

Question 5

Which ONE of the following Control Room indications will indicate that the Turning
Gear Permissives are met?
A. White Light above Turbine Lift Pumps P-124A/B and P-125A/B control switch is lit.
B. Bearing Oil Header Pressure indication PI-1403 on panel C-01 indicates 17 psig.
C. Flashing Green indicating light above Turning Gear Motor Control Switch.
D. Both Red and Green ENGAGE & DISENGAGE indicating lights are flashing.

Answer 5

A. White Light above Turbine Lift Pumps P-124A/B and P-125A/B control switch is lit.

Question 6

Which of the following Main Turbine oil pressure indication is NOT available in the Control Room?
A. Bearing Oil Header Pressure
B. Auto Stop Oil Pressure
C. Main Oil Pump Suction Pressure
D. Main Oil Pump Discharge Pressure

Answer 6

B. Auto Stop Oil Pressure

A. INCORRECT. Available on the CO-1 Panel
B. CORRECT. Available on the Main Turbine Pedestal
C. INCORRECT. Available on the CO-1 Panel
D. INCORRECT. Available on the CO-1 Panel

Question 7

Which ONE of the following will prevent starting of the Standby EHC pump?
A. High discharge filter differential pressure.
B. Auto Stop Oil Valve CV-0505 in OPEN position.
C. Main turbine not latched.
D. Low-Low level in the EHC reservoir.

Answer 7

D. Low-Low level in the EHC reservoir.

Question 8

The following plant conditions exist:
-The Plant is operating at 100% power
-Due to a turbine high vibration condition, the reactor is manually tripped from panel
C-02 but the Main Turbine does not trip
-The Control Operator attempts to trip the turbine from panel C-01 but is not successful
Which one of the following actions will immediately trip the turbine under these
conditions?
A. Close the MSIVs using the control switch(es) on panel C-02.
B. Trip the operating EHC Pump, P-19A/B, on panel C-01.
C. Push the Reactor Trip pushbutton on panel C-06.
D. Open both Main Generator breakers (25F7 and 25H9) on panel C-01.

Answer 8

A. Close the MSIVs using the control switch(es) on panel C-02.

Question 9

During 100% power operation one of the two operating Cooling Tower Pumps trip.
A rapid power reduction has been commenced per ONP26 as directed by ONP-14.
The Turbine Operator has elected to use the “Runback To 50%” option for reducing
Main Turbine load.
During the Runback the Turbine Operator notes the “HOLD” push button on the DEH
Operator Console is illuminated. Turbine power is 99% when the HOLD light
illuminated condition is noted.
The reason the “HOLD” pushbutton light is illuminated is that:
A. The runback has stopped and will not restart until the SETTER is adjusted.
B. Runback was selected while the Turbine control was in the MANUAL mode.
C. The light is illuminated in RUNBACK when ACTUAL is different from SETTER.
D. The attempt to initiate RUNBACK to 50% while in AUTO has failed.

Answer 9

C. The light is illuminated in RUNBACK when ACTUAL is different from SETTER.

A. INCORRECT. “RUNBACK” is a function of the Operator AUTO program. The
Setter does not have to be adjusted when the “Runback” option is selected.
This light is illuminated when ACTUAL is different from SETTER during
RUNBACK. It is a normal condition during RUNBACK and is expected.
B. INCORRECT. The Turbine must be in AUTO mode in order to select either
RUNBACK to 5% or Runback to 50%. RUNBACK is not available when in
MANUAL mode.
C. CORRECT. “RUNBACK” is a function of the Operator AUTO program. This
light is illuminated when ACTUAL is different from SETTER during RUNBACK.
It is a normal condition during RUNBACK and is expected to illuminate when the
ACTUAL turbine load becomes less than the load indicated in the SETTER.
D. INCORRECT. This is an expected condition for RUNBACK when the ACTUAL
load is different from the load indicated by the SETTER.

Question 10

Given the following conditions:
-Plant is at 100% power.
-The EHC Lo Lo Level Lockout Solenoid (20/LFT ) has actuated.
-The running EHC Pump has tripped due to overcurrent.
-EHC pressure is 1700 psi and lowering.
-EHC pump configuration was one pump running and one in standby prior to the
failure.
What is the effect of this malfunction on plant operation?
A. 20/AST requires EHC pressure to activate. Use the MSIVs to trip the Turbine.
B. Low EHC pressure will cause the Interface Valve to open resulting in a Turbine trip.
C. The Emergency Trip solenoid (20/ET) will not function due to low EHC pressure.
D. Turbine valves will close as EHC pressure continues to lower.

Answer 10

D. Turbine valves will close as EHC pressure continues to lower.

Question 11

The Plant is at 100% power.
SOLA Transformer, X-95, has been de-energized due to a problem with the transformer.
EK-0318, “TURBINE PANEL TROUBLE” has just annunciated.
The Operator checks the EH Priority 3 Alarms and finds that the alarm “UPS On bat” has annunciated.
The Auxiliary Operator sent to check the Uninterruptible Power Supply (UPS) reports
the “NORMAL” and “BATTERY” lights are flashing.
What is the consequence of having a UPS problem concurrent with a loss of SOLA transformer X-95?
A. The manual overspeed trip in the Main Turbine pedestal is the only overspeed protection if the UPS battery fails.
B. Alarm EK-0102, “TURBINE OVERSPEED TRIP” is lost if both DPU-2 and DPU-52 are reenergized.
C. Loss of both Overspeed Protection cabinets, DPU-2 and DPU-52, will result in a Main Turbine trip.
D. If DPU-2 power is interrupted, the turbine “Runback” feature is no longer available
for a plant emergency down power.

Answer 11

C. Loss of both Overspeed Protection cabinets, DPU-2 and DPU-52, will result in a Main Turbine trip.

PROVIDE copy of SOP-B, Attachment 16, with this question. SOP-8, Attachment
16; SOP 8; LP-EHC, Rev 17; ARP-2, Attachment 1; ARP-1.
A. INCORRECT. A loss of power from the UPS batteries concurrent with SOLA
XFMR O.O.S. results in a loss of power to both OPC units (DPU-2 and DPU-52).
De-energizing both DPU-2 and DPU-52 result in a turbine trip.
B. INCORRECT. EK-0102 is initiated by 63/AST-1 on the AUTO Stop Oil system.
It is not associated with the DEH cabinet overspeed trips.
C. CORRECT. Loss of both DPU-2 and DPU-52 result in a DEH trip of the Main
Turbine. Loss of both of these units, which would occur if power is lost from
both L-81 and L-83, result in a total loss of Overspeed protection from the DEH
System, therefore the turbine trips.
D. INCORRECT. The turbine Runback feature is part of the DEH Operator AUTO
control and is not affected by the OPC cabinet power supply problem.

Question 12

The following plant conditions exist:
-Plant is in MODE 1 at 100% power
-EHC Pump, P-19A, is selected to RUN. EHC Pump, P-19B, is selected to AUTO.
-Control Room annunciator EK-0113, “EH SYSTEM LO-LO LEVEL TRIP” annunciates.
Which one of the following describes the expected configuration of EHC Pumps, P-19A/B?
A. Both EHC pumps operating.
B. Both EHC pumps off.
C. P-19A operating, P-19B off.
D. P-19A off, P-19B operating.

Answer 12

C. P-19A operating, P-19B off.

Question 13

The plant is operating at 100% power when alarms EK-01 01, “TURBINE TRIP” and
EK-0111, “VACUUM La” illuminate on Panel C-11.
Which ONE of the following Control Room indications would validate the Turbine Trip
condition?
A. E-9A/B/C/D MSR Steam Inlet Control Valves indicate OPEN.
B. Generator Bearing Oil Lift Pump (P-2S) automatically STARTS as turbine speed
reduces to 600 RPM.
C. Seal Oil Emergency Backup Pump (P-23) auto STARTS due to low differential
pressure between Air Side and Generator Gas pressure (DPT-SOOS).
D. Unit Emergency Turbine Trip pushbutton on Panel C-01 is FLASHING.

Answer 13

B. Generator Bearing Oil Lift Pump (P-2S) automatically STARTS as turbine speed
reduces to 600 RPM.

Question 14

Control Room alarm EK-0105, “TURBINE HI VIBRATION” has just been received.
Which ONE of the following conditions is consistent with this alarm?
A. Main Turbine Lube Oil Cooler (E-15NB) Outlet Temperature is 85°F.
B. EHC Oil Cooler (E-12A/B) Outlet Temperature indicates 185°F.
C. Main Turbine is at 40% load without Moisture Separator Reheaters (E-9A/B/C/D) in
service.
D. Both the Air Side Seal Oil Pump (P-22) and Seal Oil Emergency Backup Pump
(P-23) are running.

Answer 14

A. Main Turbine Lube Oil Cooler (E-15NB) Outlet Temperature is 85°F.

Question 15

During turbine rollup to synchronous speed (1800 RPM), which ONE of the following
describes the implications of operating with the Main Turbine speed in a CRITICAL
RANGE?
A. Turbine would be operating at a resonance frequency with potential damage to
turbine bearings and blades due to excessive vibration.
B. REC-0516 Main Turbine Generator Vibration, Eccentricity and Expansion Recorder
information will be erroneous.
C. PMG power output supply to Manual Cabinet OA will be unstable and damage to
control circuit cards could occur.
D. System Engineer will be able to collect critical turbine data at the required turbine
operating conditions.

Answer 15

A. Turbine would be operating at a resonance frequency with potential damage to
turbine bearings and blades due to excessive vibration.

Question 16

The plant is operating at full load when Control Room alarm EK-0118, “TURB.-GEN.
LUBE OIL HI TEMP” is received.
Which ONE of the following conditions would require the turbine to be shutdown per
GOP-8? (Assume all conditions occur simultaneously)
A. Two bearing metal temperature indications on TR-0506 indicate greater than 185°F.
B. Bearing #8 metal temperature indication on TR-0506 indicates greater than 225°F.
C. EK-0115, “EH SYSTEM HI TEMP/PRESS” alarm concurrent with EK-1165,
“NON-CRITICAL SERV WATER LO PRESS” alarm.
D. South Isophase Return Temperature indicator TIA-1205 indicates 175°F and
EK-1165, “NON-CRITICAL SERV WATER LO PRESS” is in alarm.

Answer 16

B. Bearing #8 metal temperature indication on TR-0506 indicates greater than 225°F.

Question 17

The plant is at 905% power.
A power escalation at 3% per hour is in progress.
EK-0106, “EXHAUST HOOD HI TEMP 21 rF” has just annunciated.
Exhaust Hood spray temperature is approaching 250°F on TI-0594 on the West
Turbine Deck. TI-0595 is 200°F on the West Turbine Deck
What is the consequence of operating the turbine for an extended period of time under
the above conditions?
A. Possible overheating in the later stages of LP Turbine blades.
B. Uneven expansion of the Low Pressure Turbine shroud and possible blade rubbing.
C. Possible rubbing of moving blades against stationary blades and components
D. Possible bowing of the turbine shaft due to uneven heating of the blades.

Answer 17

A. Possible overheating in the later stages of LP Turbine blades.

A. CORRECT. The hood spray monitors the LP turbine exhaust regions and these temperatures measure the exhaust in the LP turbine area. The elevated temperatures indicate a possible overheating in the later stages. Higher stages
are used by the feedwater heaters.
B. INCORRECT. This condition would be monitored/measured by Differential
Expansion and alarmed by EK-01 04, TURBINE DIFF EXPANSION ROTOR
LONG/SHORT”
C. INCORRECT This is another possible result of a differential expansion problem
and is monitored by alarm EK-0104.
D. INCORRECT. This condition is a concern while the turbine is on the gear or during turbine roll-up and is measured by Rotor Eccentricity and alarmed by EK-0103, “TURBINE ROTOR ECCENTRICITY” and should also be seen as a rise in turbine vibration.

Question 18

Given the following conditions:
-The turbine is operating at 1800 RPM and unloaded when annunciator EK-0318 “TURBINE PANEL TROUBLE” alarm actuates.
-EK-0318 was actuated by DEH Priority 3 alarm, “OPCO”, “OVERSPEED PROTECTION CONTROLLER ACTIVATED”.
-Indications are available that the Overspeed Protection Controller has actuated.
Which one of the following is the expected response of the Turbine Valves?
A. Turbine Stop Valves and Reheat Stop Valves CLOSE.
B. Turbine Governor Valves and Intercept Valves CLOSE.
C. Turbine Governor Valves and Reheat Stop Valves CLOSE.
D. Turbine Bypass Valve OPENS and Intercept Valves CLOSE.

Answer 18

B. Turbine Governor Valves and Intercept Valves CLOSE.

Question 19

Which ONE of the following correctly describes the turbine response to placing the Overspeed Protection Controller in the OPC TEST position during a startup with the turbine latched but not rolling?
A. Turbine speed increases to between 1940 and 2020 RPM. (Overspeed setpoint)
B. Intercept and Governor Valves CLOSE.
C. Governor Valves only CLOSE.
D. Intercept Valves only CLOSE.

Answer 19

D. Intercept Valves only CLOSE.

Question 20

During full load turbine operation it is noticed that the LATCH push button indication is extinguished.
Which ONE of the following requirements must be met to allow relamping of the LATCH push button?
A. Reduce turbine load to less than 90% prior to relamping.
B. Direct an operator to the front standard to place the TEST lever to the TEST
POSITION and HOLD until switch is relamped.
C. Replace the light bulb without additional actions. There are no restrictions for
relamping.
D. Bulb may only be replaced the next time the turbine is taken off-line.

Answer 20

D. Bulb may only be replaced the next time the turbine is taken off-line.

Question 21

The following plant conditions exist:
-Reactor Delta T power indicates 86%
-Turbine Valve Testing is in progress on valves associated with Moisture Separator
Reheaters E-9A1C
-Following actuation of the test, Intercept Valve #2 from MSR E-9A to ‘A’ Low
Pressure Turbine (CV-0540) fails to re-open.
-Two attempts have been made to open CV-0540 using the DEH controls.
-Main steam supply valves to the affected MSRs have been ensured closed.
-EHC fluid has been isolated to the Reheat Stop and Intercept valves on the affected MSRs.
Which ONE of the following describes the CORRECT actions to be taken?
A. No action is required EXCEPT for CONTINUOUS monitoring of turbine vibration
and differential expansion recorders.
B. Depress RESET pushbutton on Panel C-01 to isolate Main Steam to all Moisture
Separator Reheaters, lower turbine load to less than 30%.
C. Lower turbine load such that reactor power is less than 50% within three hours.
D. Isolate EHC fluid to affected valve, place turbine control in MANUAL, OPEN
governor valves to recover lost megawatts.

Answer 21

C. Lower turbine load such that reactor power is less than 50% within three hours.

Question 22

The following plant conditions exist:
-Valve Position Limiter is set at 103%
-Turbine Valve Testing is in progress on Turbine Stop and Governor Valves
-During test performance, Auxiliary Operator reports Governor Valve #3 (CV-0574) is
operating in a sluggish manner
Which ONE of the following describes the required action(s)?
A. DEPRESS the Valve Test Close pushbutton to repeat the test.
B. Notify the Shift Manager of sluggish valve operation.
C. Notify System Engineer, continue testing the remaining valves.
D. Isolate EHC fluid to affected valve, verify other governor valves open to
compensate for isolated valve.

Answer 22

B. Notify the Shift Manager of sluggish valve operation.

Question 23

Which ONE of the following CORRECTLY states the restrictions on Reactor Power and Turbine Load for conducting Turbine Valve Testing?
Delta-T Power; Turbine Load
A. >85% to 75% to 70% to 65% to

Answer 23

A. >85% to

Question 24

During testing of the Intercept and Reheat Stop Valves lAW SOP-B, Attachment 2, the
instantaneous rate of change of the Low Pressure Turbine Inlet temperatures should
be limited to 100°F/hr. or less.
The basis for this limit is to prevent:
A. overspeeding of the Main Turbine.
B. damage to the Main Steam Reheater tube bundles.
C. distortion of the Low Pressure Turbine stationary components.
D. erosion of the Low Pressure Turbine extraction steam nozzles.

Answer 24

C. distortion of the Low Pressure Turbine stationary components.

Question 25

The following plant conditions exist:
-The Main Turbine is rolling at 1800 RPM and ready to be synchronized to the grid
-You are directed to establish parameter values for Reactor Power, Tave, and
Turbine Bypass Controller (PIC-0511) output in accordance with SOP-8 for
synchronizing the Main Turbine to the grid:
Which ONE of the following correctly states the suggested values for the above stated
plant parameters?
Rx Power; Tave; PIC-0511 Output
A. 15% 532F 55%
B. 13% 540F 65%
C. 11% 545F 55%
D. 9% 548F 65%

Answer 25

B. 13% 540F 65%

Question 26

A plant Start-Up is in progress with Reactor Power at 12% just prior to Turbine
Generator Synchronization. A leak on the Turbine Lube Oil System has occurred that
can not be controlled. All standby oil pumps have started and oil pressure is still
decreasing. As the Control Room Supervisor what orders would you give and
approximately what is the expected demand signal on the Turbine Bypass controller
just prior to synchronization?
A. Trip the Reactor and enter EOP-1.0 Standard Post Trip Recovery procedure,
between 25% and 50%
B. Trip the Turbine and enter ONP-1 Loss of Load procedure; between 25% and 50%
C. Trip the Reactor and enter EOP-1.0 Standard Post Trip Recovery procedure;
greater than 60%
D. Trip the Turbine and enter ONP-1 Loss of Load procedure; greater than 60%

Answer 26

D. Trip the Turbine and enter ONP-1 Loss of Load procedure; greater than 60%

Question 27

Which ONE of the following correctly states how the following plant parameters change
from steady state just prior to when the turbine/generator is synchronized to the grid, to
steady state after the DEH has picked up approximately 25 megawatts of turbine load?
(Do not consider the effects of Turbine Bypass Valve.)
Rx Power; Tave; Stm Flow; Feed Flow; S/G Press
A. rise; lower; rise; lower; lower
B. lower; rise; lower; rise; rise
C. lower; lower; lower; lower; rise
D. rise; lower; rise; rise; lower

Answer 27

D. rise; lower; rise; rise; lower

Question 28

Which of the following Main Turbine oil pressure indication is NOT available in the Control Room?
A. Bearing Oil Header Pressure
B. Auto Stop Oil Pressure
C. Main Oil Pump Suction Pressure
D. Main Oil Pump Discharge Pressure

Answer 28

B. Auto Stop Oil Pressure

Question 29

Which ONE of the following describes the function of the Auxiliary Governor Trip
Solenoid Valves (20-1/AG and 20-2/AG)?
A. Provides a backup for the 20 ET Emergency Trip Solenoid by providing an alternate path for draining EHC fluid from the Main Turbine Stop, Governor, Intercept, and Reheat Stop valves.
B. Provides a backup for the Auto Stop Oil trip by providing an alternate path for draining EHC fluid from the Main Turbine Stop, Governor, Intercept, and Reheat Stop valves.
C. Open when the main turbine speed increases to 103% to drain EHC fluid from the Main Turbine Stop, Governor, Intercept, and Reheat Stop valves.
D. Open when the main turbine speed increases to 103% to drain EHC fluid from the Main Turbine Governor Valves and Intercept Valves to prevent a main turbine.

Answer 29

C. Open when the main turbine speed increases to 103% to drain EHC fluid from the Main Turbine Stop, Governor, Intercept, and Reheat Stop valves.

Question 30

The plant is ,at 95% power.
A power escalation at 3% per hour is in progress.
EK-0106, “EXHAUST HOOD HI TEMP 217F” has just annunciated.
Exhaust Hood spray temperature is approaching 250°F on TI-0594 on the West
Turbine Deck. TI-0595 is 200°F on the West Turbine Deck
What is the consequence of operating the turbine for an extended period of time under
the above conditions?
A. Possible overheating in the later stages of LP Turbine blades.
B. Uneven expansion of the Low Pressure Turbine shroud and possible blade rubbing.
C. Possible rubbing of moving blades against stationary blades and components
D. Possible bowing of the turbine shaft due to uneven heating of the blades.

Answer 30

A. Possible overheating in the later stages of LP Turbine blades.

Question 31

During 100% power operation one of the two operating Cooling Tower Pumps trip.
A rapid power reduction has been commenced per ONP-26 as directed by ONP-14.
The Turbine Operator has elected to use the “Runback To 50%” option for reducing
Main Turbine load.
The Turbine Operator notes the “HOLD” push button light on the DEH Operator
Console is illuminated. illuminates when “Runback to 50%” is selected.
The reason the “HOLD” pushbutton light is illuminated is that:
A. The runback has stopped and will not restart until the SETTER is adjusted.
B. Runback was selected while the Turbine control was in the MANUAL mode.
C. The light is illuminated in RUNBACK when ACTUAL is different from SETTER.
D. The attempt to initiate RUNBACK to 50% while in AUTO has failed.

Answer 31

C. The light is illuminated in RUNBACK when ACTUAL is different from SETTER.

Question 32

The Plant is at 100% power.
SOLA Transformer, X-95, has been de-energized due to a problem with the transformer.
EK-0318, “TURBINE PANEL TROUBLE” has just annunciated.
The Operator checks the EH Priority 3 Alarms and finds that the alarm “UPS On bat” has annunciated.
The Auxiliary Operator sent to check the Uninterruptible Power Supply (UPS) reports
the “NORMAL” and “BATTERY” lights are flashing.
What is the consequence of having a UPS problem concurrent with a loss of SOLA transformer X-95?
A. The manual overspeed trip in the Main Turbine pedestal is the only overspeed protection if the UPS battery fails.
B. Alarm EK-0102, “TURBINE OVERSPEED TRIP” is lost if both DPU-2 and DPU-52 are reenergized.
C. Loss of both Overspeed Protection cabinets, DPU-2 and DPU-52, will result in a Main Turbine trip.
D. If DPU-2 power is interrupted, the turbine “Runback” feature is no longer available
for a plant emergency down power.

Answer 32

C. Loss of both Overspeed Protection cabinets, DPU-2 and DPU-52, will result in a Main Turbine trip.

Question 33

Which one of the following turbine trips directly actuates the EHC Emergency Trip
Solenoid Valve 20/ET? (Assume all trip functions perform as designed)
A. Low vacuum.
B. Reactor Trip.
C. Turbine No-load.
D. Thrust Bearing.

Answer 33

D. Thrust Bearing.

Question 34

The following plant conditions exist:
-The Plant is operating at 100% power
-Due to a turbine high vibration condition, the reactor is manually tripped from panel
C-02 but the Main Turbine does not trip
-The Control Operator attempts to trip the turbine from panel C-01 but is not successful
Which one of the following actions will immediately trip the turbine under these
conditions?
A. Close the MSIVs using the control switch(es) on panel C-02.
B. Trip the operating EHC Pump, P-19A1B, on panel C-01.
C. Push the Reactor Trip pushbutton on panel C-06.
D. Open both Main Generator breakers (25F7 and 25H9) on panel C-01.

Answer 34

A. Close the MSIVs using the control switch(es) on panel C-02.

Question 35

The following plant conditions exist:
-Plant is in MODE 1 at 100% power
-EHC Pump, P-19A, is selected to RUN. EHC Pump, P-19B, is selected to AUTO.
-Control Room annunciator EK-0113, “EH SYSTEM LO-LO LEVEL TRIP” annunciates.
Which one of the following describes the expected configuration of EHC Pumps, P-19A/B?
A. Both EHC pumps operating.
B. Both EHC pumps off.
C. P-19A operating, P-19B off.
D. P-19A off, P-19B operating.

Answer 35

C. P-19A operating, P-19B off.

Question 36

Which ONE of the following Control Room indications will indicate that the Turning
Gear Permissives are met?
A. White Light above Turbine Lift Pumps P-124A/B and P-125A/B control switch is lit.
B. Bearing Oil Header Pressure indication PI-1403 on panel C-01 indicates 17 psig.
C. Flashing Green indicating light above Turning Gear Motor Control Switch.
D. Both Red and Green ENGAGE & DISENGAGE indicating lights are flashing.

Answer 36

A. White Light above Turbine Lift Pumps P-124A/B and P-125A/B control switch is lit.

Question 37

Given the following conditions:
-The turbine is operating at 1800 RPM and unloaded when annunciator EK-0318
“TURBINE PANEL TROUBLE” alarm actuates.
-EK-0318 was actuated by DEH Priority 3 alarm, “OPCO”, “OVERSPEED
PROTECTION CONTROLLER ACTIVATED”.
-Indications are available that the Overspeed Protection Controller has actuated.
Which one of the following is the expected response of the Turbine Valves?
A. Turbine Stop Valves and Reheat Stop Valves CLOSE.
B. Turbine Governor Valves and Intercept Valves CLOSE.
C. Turbine Governor Valves and Reheat Stop Valves CLOSE.
D. Turbine Bypass Valve OPENS and Intercept Valves CLOSE.

Answer 37

B. Turbine Governor Valves and Intercept Valves CLOSE.