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Test 6 > Shield Cooling > Flashcards

Shield Cooling Flashcards

1
Q

Which one of the following correctly states the significance of turning the handswitch of
the non-operating Shield Cooling Pump past the TRIP position and pulling it out?
A. Aligns pump circuitry for automatic start on low flow.
B. Aligns pump circuitry for automatic start on low pressure.
C. Prevents the pump from starting automatically under any condition.
D. Provides BLOCK of EK-1303 “REACTOR SHIELD CLG LO FLOW” alarm

A

B. Aligns pump circuitry for automatic start on low pressure

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2
Q

Which one of the following statements best describes the alignment of cooling coils in
the Shield Cooling System?
A. all cooling coils are valved into service at all times.
B. all floor slab cooling coils are valved into service at all times, with one set of shield
wall coils isolated.
C.one set of floor slab cooling coils and one set of shield wall cooling coils valved into
service at all times.
D. cooling coils are valved into service as directed by the Shift Manager

A

C.one set of floor slab cooling coils and one set of shield wall cooling coils valved into
service at all times

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3
Q

The purpose of the Shield Cooling System is to maintain Biological Shield concrete
temperature less than oF

A

165

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4
Q

Which ONE of the following describes the MINIMUM Shield Cooling System operating
components needed to fulfill the design basis requirements for the system?
A.One pump, one heat exchanger, one set of cooling coils.
B. One pump, two heat exchangers, two sets of cooling coils.
C. Two pumps, one heat exchanger, one set of cooling coils.
D. Two Pumps, two heat exchangers, two sets of cooling coils.

A

A.One pump, one heat exchanger, one set of cooling coils

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5
Q

Which ONE of the following correctly describes the operational design of the Shield
Cooling Heat Exchanger?
A. Parallel flow, CCW in the tubes, SCS in the shell.
B. Parallel flow, CCW in the shell, SCS in the tubes.
C. Counter flow, SCS in the tubes, CCW in the shell.
D. Counter flow, SCS in the shell, CCW in the tubes.

A

C. Counter flow, SCS in the tubes, CCW in the shell.

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6
Q

Which one of the following statements best describes the alignment of cooling coils in
the Shield Cooling System?
A. all cooling coils are valved into service at all times.
B. all floor slab cooling coils are valved into service at all times, with one set of shield
wall coils isolated.
C. one set of floor slab cooling coils and one set of shield wall cooling coils valved intc
service at all times.
D. cooling coils are valved into service as directed by the Shift Manager

A

C. one set of floor slab cooling coils and one set of shield wall cooling coils valved intc
service at all times

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7
Q

Which ONE of the following correctly describes why the design capacity of the Shield
Cooling Surge Tank, T-62, is 1700 gallons?
Shield Cooling Surge Tank capacity is based on .
A. change in system water density as a result of maximum change in heat exchanger
differential temperature with no surge tank makeup flow.
B. preserving the proper net positive suction head to the SCS pumps when primary
coolant system temperature decreases below 1650F.
C. maintaining system pressure when both SCS heat exchangers and one set of
cooling coils are placed in service.
D. total change in system water volume as a result of maximum possible change in
water temperature from a cold start condition at 60°F to 212°F

A

D. total change in system water volume as a result of maximum possible change in
water temperature from a cold start condition at 60°F to 212°
A. Incorrect: makeup flow would not be needed unless lowering level in tank. Question asks why capacit~
is 1700 gal..
B. Incorrect: SCS system is not operated below PCS temperature of 165 degrees F.
C. Incorrect: Design system configuration is one heat exchanger and one set of cooling coils.
D. Correct: Per the FSAR the capacity is based on volume changes as the SCS system heats up.

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8
Q

Which one of the following correctly states the significance of turning the handswitch of
the non-operating Shield Cooling Pump past the TRIP position and pulling it out?
A. Aligns pump circuitry for automatic start on low flow.
B. Aligns pump circuitry for automatic start on low pressure.
C. Prevents the pump from starting automatically under any condition.
D. Provides BLOCK of EK-1303 “REACTOR SHIELD CLG LO FLOW” alarm.

A

B. Aligns pump circuitry for automatic start on low pressure

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9
Q 
Which ONE of the following is the correct operating range for the Shield Cooling Surge
Tank Makeup Control Valve CV-092?
A. 15% to 75%.
B. 23% to 86%.
C. 32% to 94%.
D. 39% to 85%.
A

B. 23% to 86%.

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10
Q 
Given a low pressure condition in the Shield Cooling System, the standby pump will
automatically start at \_\_ psig.
A. 17 psig.
B. 27 psig.
C. 35 psig.
D. 42 psig.
A

C. 35 psig.

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11
Q

The Shield Cooling System is in operation with Shield Cooling Pump P-77A and
Cooling Coil B in-service. Control Room alarm EK-1304 “REACTOR SHIELD CLG HI
TEMP” has just been received.
Which ONE of the following Control Room indications can be used to validate the
alarm condition?
A. Containment Building Pressure Indication.
B. Red indicating light illuminated on standby pump.
C. Average Containment Air Temperature
D. Coil B Outlet Tempreature

A

D. Coil B Outlet Tempreature

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12
Q

Control Room alarm EK-1304 “REACTOR SHIELD CLG HI TEMP” has just been
received. Prior to receiving the alarm, the Shield Cooling System was in operation with
Shield Cooling Pump P-77A and Cooling Coil A in-service.
Which ONE of the following Control Room indications can be used to validate the
alarm condition?
A. EK-1305, “SHIELD CLG SURGE TANK T-62 HI-LO LEVEL” alarming
B. Shield Cooling Pump P-77B amber light is lit.
C. EK-1170/71, “COMPONENT CLG EX E-54A/B HI-LO TEMP” annunciating.
D. Containment Building Pressure Indication.

A

C. EK-1170/71, “COMPONENT CLG EX E-54A/B HI-LO TEMP” annunciating.
A. Incorrect: Surge tank low level may indicate a potential leak in system. High level may be possible
indication of CCW in leakage. Neither would lead immediately to a high system temperature.
B. Incorrect: P-77B should be in Standby condition - amber light would be lit.
C. Correct: CCW provides cooling to shield cooling heat exchanger E-64. With CCW in alarm state due
to high temperatures components cooled by CCW can be driven to alarm state.
D. Incorrect: No relationship between containment building pressure and high temperature within shield
cooling.

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13
Q

The plant is operating at 80% power with Shield Cooling Pump P-77A tagged out of
service due to bad motor bearings.
The following Control Room alarms are received:
• EK-1301, “SHIELD CLG PUMP TRIP”
• EK-1302, “REACTOR SHIELD CLG PUMPS DISCH LO PRESS”
• EK-1303, “REACTOR SHIELD CLG LO FLOW”
Which action, if any, is required?
A.Immediately initiate a controlled plant shutdown.
B. Ensure Bioshield Temperature Indication remains below the required temperature.
C. Clear tagging on Shield Cooling Pump P-77A and place in service.
D. No action is required, system is not safety related

A

A.Immediately initiate a controlled plant shutdown

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14
Q

Initial plant conditions are as follows:
• The reactor is critical and above the point of adding heat.
Tave is 5300F
P-77A is out of service to repair motor bearing.
Prior to shifting to Mode 1 the following alarms are received:
• EK-1124, “TRAVELING SCREEN HI dP”
• EK-1160, “RADWASTE PANEL C105 OFF NORMAL”
EK-1301, “SHIELD CLG PUMPS TRIP”
EK-1304,” REACTOR SHIELD CLG HI TEMP”
In reference to the Shield Cooling System, which one of the following statements is
correct?
A. Shift cooling flow to the opposite cooling coils and verify surge tank level is above
low level setpoint.
B. Commence plant shutdown if high temperature alarm cannot be cleared and shield
cooling temperature exceeds 165°F.
C. Clear tagging on Shield Cooling Pump P-77A and place in service.
D. Control room Operator shall immediately start an additional CCW pump to increase
flow through the shield cooling heat exchanger (E-64).

A

B. Commence plant shutdown if high temperature alarm cannot be cleared and shield
cooling temperature exceeds 165°F.

Shield Cooling System shall be in operation prior to Primary Coolant temperature exceeding
165 degrees Fahrenheit during Plant heatup. With P-77B unavailable and trip of P-77A shield cooling is
not operable - commence shutdown and cooldown.

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15
Q

Which of the following states the proper method of transferring Shield Cooling Coils
with the system in service?
A. Stop running pump, CLOSE CV for coil to be removed from service, OPEN CV for
coil being placed in service, restart pump.
B. Start standby pump, OPEN CV for coil being placed in service, CLOSE CV for coil
to be removed from service, stop original running pump.
C. Verify system in operation, OPEN CV for coil being placed in service, CLOSE CV
for coil to be removed from service, verify EK-1303 REACTOR SHIELD CLG LO
FLOW alarm remains clear.
D. Verify system in operation, CLOSE CV for coil to be removed from service, verify
EK-1303 REACTOR SHIELD CLG LO FLOW actuates, OPEN CV for coil being
placed in service.

A

C. Verify system in operation, OPEN CV for coil being placed in service, CLOSE CV
for coil to be removed from service, verify EK-1303 REACTOR SHIELD CLG LO
FLOW alarm remains clear.

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16
Q

Which one of the following describes the effect, if any, on the Shield Cooling System
as a result of a CHP/CHR actuation?
A. CHP/CHR has no effect on the Shield Cooling System.
B. Trips the operating P-77 Pump, closes supply CV for the cooling coil in service.
C. Automatically starts the standby P-77 Pump and opens the supply CV to the
standby cooling coil.
D. Automatically closes CV-0939, T-62, Shield Cooling Surge Tank Makeup Isolation
valve.

A

D. Automatically closes CV-0939, T-62, Shield Cooling Surge Tank Makeup Isolation
valve.

17
Q

Given that a CHP/CHR actuation has occurred, which one of the following statements
is true concerning the Shield Cooling System?
A.CV-0939, Shield Cooling Surge Tank Fill, automatically closes.
B. CCW flow is raised through the Shield Cooling Heat Exchanger.
C. The standby cooling coil is automatically placed in service.
D. Standby Shield Cooling Pump automatically starts.

A

A.CV-0939, Shield Cooling Surge Tank Fill, automatically closes.

18
Q

The plant is in Mode 5 with plant heatup in progress. Primary coolant temperature is
1500F. Shield Cooling Pump P-77B is tagged out of service to replace bad motor
bearings and is not expected to be available for 2 hours.
The Shield Cooling pump P-77A has been started and aligned to the “B” Shield Cooling
Coil. Operators are completing venting operations in accordance with SOP-29.
Five (5) minutes after P-77A was.started the following Control Room alarms are
received:
• EK-1301, “SHIELD CLG PUMP TRIP”
• EK-1302, “REACTOR SHIELD CLG PUMPS DISCH LO PRESS”
• EK-1303, “REACTOR SHIELD CLG LO FLOW”
Which action, if any, is required?
A. Shift P-77A discharge to the “A” Shield Cooling Coil and attempt to restart P-77A.
B. Secure plant heatup and maintain PCS temperature below 165F.
C. Verify the Bioshield temperature Indication remains below 120F using TE-0931.
D. Secure plant heatup prior to Tave exceeding 200F and maintain plant in Mode 5

A

B. Secure plant heatup and maintain PCS temperature below 165F.
Correct: Shield Cooling System shall be in operation prior to Primary Coolant temperature exceeding
165 degrees Fahrenheit during Plant heatup. With P-77B unavailable and trip of P-77 A shield cooling is
not operable - secure heatup.

19
Q

Which ONE of the following correctly describes why the design capacity of the Shield
Cooling Surge Tank, T-62, is 1700 gallons?
Shield Cooling Surge Tank capacity is based on …….
A. Change in system water density as a result of maximum change in heat exchanger differential temperature with no surge tank makeup flow
B. preserving the proper NPSH to the SCS pumps when primary coolant system temperature decreases below 165F
C. Maintaining system pressure when both SCS HXs are one set of cooling coils are placed in service.
D. total change in system water volume as a result of maximum possible change in water temperature from a cold start condition at 60F to 212F.

A

D. total change in system water volume as a result of maximum possible change in water temperature from a cold start condition at 60F to 212F.

20
Q

Initial plant conditions are as follows:
• The reactor is critical and above the point of adding heat.
• Tave is 5300F
• P-77A is out of service to repair motor bearing.
Prior to shifting to Mode 1 the following alarms are received:
• EK-1124, “TRAVELING SCREEN HI dP”
• EK-1160, “RADWASTE PANEL C105 OFF NORMAL”
• EK-1301, “SHIELD CLG PUMPS TRIP”
• EK-1304,” REACTOR SHIELD CLG HI TEMP”
In reference to the Shield Cooling System, which one of the following statements is
correct?
A. Shift cooling flow to the opposite cooling coils and verify surge tank level is above
low level setpoint.
B.Commence plant shutdown if high temperature alarm cannot be cleared and shield
cooling temperature exceeds 165°F.
C. Clear tagging on Shield Cooling Pump P-77A and place in service.
D. Control room Operator shall immediately start an additional CCW pump to increase
flow through the shield cooling heat exchanger (E-64).

A

B.Commence plant shutdown if high temperature alarm cannot be cleared and shield
cooling temperature exceeds 165°F

21
Q

Control Room alarm EK-1304 “REACTOR SHIELD CLG HI TEMP” has just been
received. Prior to receiving the alarm, the Shield Cooling System was in operation wittShield
Cooling Pump P-77A and Cooling Coil A in-service.
Which ONE of the following Control Room indications can be used to validate the
alarm condition?
A. EK-1305, “SHIELD CLG SURGE TANK T-62 HI-LO LEVEL” alarming
B. Shield Cooling Pump P-77B amber light is lit.
C. EK-1170/71, “COMPONENT CLG EX E-54NB HI-LO TEMP” annunciating.
D.Containment Building Pressure Indication.

A

C. EK-1170/71, “COMPONENT CLG EX E-54NB HI-LO TEMP” annunciating.

22
Q

Given the following conditions:
• The plant has been shut down for 23 days and is in Mode 6.
• Irradiated fuel is being moved to the Spent Fuel Pool.
• Due to evaporative losses, primary makeup water is being added to the Spent
Fuel Pool from tank T-90.
• Current Spent Fuel Pool boron concentration is 2540 ppm with sampling in
progress.
Which of the following will require immediate suspension of core alterations and the
movement of fuel in the Spent Fuel Pool lAW the Operating Requirements Manual?
A.Spent Fuel Pump P-51 B removed from service for bearing replacement.
B.Chemistry reports the sample results for Spent Fuel Pool boron concentration as
2210 ppm.
C RIA-2313, Spent Fuel Pool Area Monitor, failing downscale and declared inoperable.
D.EK-1309, “Spent Fuel Pool HI/LO Level” annunciator is alarming with level reported
at 647’ 10”.

A

C RIA-2313, Spent Fuel Pool Area Monitor, failing downscale and declared inoperable

23
Q

Which one of the following will lead to an automatic closure of CV-0939, T-62, Shield
Cooling Surge Tank Makeup Isolation valve?
A. Shield cooling surge tank high level above 80”
B. Recirculation Actuation Signal (RAS)
C. Anticipated Transient Without Scram (ATWS)
D.Containment High Radiation (CHR)

A

D.Containment High Radiation (CHR)

Test 6 (6 decks)

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