Compressed Air Systems

Question 1

A significant grid problem has resulted in a plant trip with a Loss of Offsite Power.
Diesel Generator 1-2 started and loaded per the Shutdown Sequencer.
Diesel Generator 1-1 failed to start and could not be started from the Control Room.
At the time of the trip the plant Instrument Air System was configured as follows:
Instrument Air Compressors; C-2A in HAND, C-2B in AUTO and C-2C in OFF.
Feedwater Purity Air Compressors; C-903A in MANUAL, C-903B in AUTOMATIC.
Other plant air systems were in normal configuration for plant power operation.

Which of the following describes the actions required to provide Instrument Air and
High Pressure Air to plant components?
A. Start C-2C. Energize HP Air Compressor C-6A and supply West Safeguards HP
Air Receiver Tank, T-9B, from East Safeguards HP Air Tank, T-9A.
B. Start C-2C. Energize HP Air Compressor C-6A and ensure correct alignment of
Instrument air and N2 supply valves to CVs supplied by HP Air Tank T-9B.
C. Start C-2B. Energize HP Air Compressor C-6A and supply West Safeguards HP
Air Receiver Tank, T-9B, from East Safeguards HP Air Tank, T-9A.
D. Start C-2B. Energize HP Air Compressor C-6A and ensure correct alignment of
Instrument air and N2 supply valves to all CVs supplied by HP Air Tank T-9B.

Answer 1

D. Start C-2B. Energize HP Air Compressor C-6A and ensure correct alignment of
Instrument air and N2 supply valves to all CVs supplied by HP Air Tank T-9B.

Question 2

The plant is at 100% power.
• Instrument Air Compressors are configured as follows:
• C-2A in HAND with a red light lighted, C-2B in AUTO with yellow light lighted,
C-2C in OFF with green light lighted.
• EK-11 02, “Instrument Air Lo Pressure” has annunciated
• EK-11 01, “Containment Instrument Air Pressure Low” has annunciated.
• EK-1103, “SERVICE Air Lo Pressure has annunciated.
• Control Room indication, PIA-1210, “Instrument Air Header Pressure” is reading 84 psig.
• There are no reports of substantial air leaks from plant personnel.

Based upon the above indications, which of the following statements represents the
current status of the Instrument Air Supply system?
A. Air Compressor C-2A did not load and Service Air did not isolate.
B. Air Compressor C-2A did not load and Containment Air isolated.
C. Standby Air Compressor C-2B did not start and Service Air did not isolate.
D. Standby Air Compressor C-2B did not start and service Air isolated.

Answer 2

D. Standby Air Compressor C-2B did not start and service Air isolated.

Question 3

Which of the following plant components ARE NOT supplied with a source of filtered,
dried air?
A. Track Alley Deluge Systems
B. Atmospheric Steam Dumps
C. Main Steam Isolation Valves
D. Main Feed Pump Turbines

Answer 3

A. Track Alley Deluge Systems

Question 4

The plant is in MODE 3
Which of the following systems or components may be supplied with Plant Service Air
under current plant conditions?
A. EastSafeguards High Pressure Air Receiver Tank T-9A.
B. West Safeguards High Pressure Air Receiver Tank T-9B.
C. Turbine Building High Pressure Control Air.
D. Service Air to the Containment Structure.

Answer 4

C. Turbine Building High Pressure Control Air.

Question 5

For Instrument Air Compresor C-2A, C-28, and C-2C, which one of the following
control functions can be initiated from the local control panel?
A. Adjusting compressor discharge pressure
B. Emergency Stop
C. Placing in Standby
D. Adjusting discharge air flowrate.

Answer 5

B. Emergency Stop

Question 6

Instrument Air Compressor, C-2A, is in operation with Instrument Air Compressor,
C-2C, in AUTO. Instrument Air Compressor, C-2B, is tagged out for maintenance. An
air leak caused air header pressure to lower to 85 psig. The air leak was subsequently
isolated, at which time header pressure returned to 110 psig. How would C-2C
respond to this instrument air pressure transient? C-2C will…
A. not auto-start during this instrument air transient.
B. auto-start and continue to run unloaded until placed in OFF and returned to AUTO.
C. auto-start, but will stop after running unloaded for a period of time.
D. auto-start and run fully loaded until placed in OFF and returned to AUTO.

Answer 6

C. auto-start, but will stop after running unloaded for a period of time.

Question 7

During a specific Appendix R scenario (loss of power due to fire) the normal air supply,
High Pressure Air Compressor, C-6B, and control power to CV-3018, “SI Tank Test
Line Redundant High Pressure Injection” are lost.
What is the backup system to allow operation of CV-3018, “SI Tank Line Redundant
High Pressure Injection” and how is it initiated?
A. Backup nitrogen bottles are connected to the air manifold to supply back-up air to
CV-3018. A manual valve must be opened by an operator to supply back-up
nitrogen.
B. Backup air bottles are connected to the air manifold to supply back-up air to
CV-3018. A manual valve must be opened by an operator to supply back-up air.
C. Backup nitrogen bottles are connected to the air manifold to supply back-up air to
CV-3018. Nitrogen will automatically align to supply back-up nitrogen.
D. Backup air bottles are connected to the air manifold to supply back-up air to
CV-3018. The bottles will automatically align to supply back-up air.

Answer 7

B. Backup air bottles are connected to the air manifold to supply back-up air to
CV-3018. A manual valve must be opened by an operator to supply back-up air.

Question 8

The plant is in Mode 3. Nitrogen header pressure for Nitrogen Backup Station #1 is 20 psig. What action should be taken?
A. Restore Station #1 to operable status within 1 hour.
B. Restore Station #1 to operable status within 72 hour.
C. Restore Station #1 to operable status within 30 days.
D. Enter 7 day required actions and verify AFW valves CV-0736A and CV-0737A are
operable.

Answer 8

C. Restore Station #1 to operable status within 30 days.

Question 9

From full power, a Safety Injection occurs, concurrent with a loss of Instrument Air.
Instrument Air pressure indicates 10 psig, and is lowering. Several minutes later, it is
noted that Station and FW Tie-In Control Valve, CV-1221 indicating RED light is ON.
The GREEN light is OFF. The handswitch remains selected to CLOSE. The NCO
confirms that NO operator action was taken to operate this control valve handswitch.
Which one of the following accounts for the status of CV-1221?
A. CV-1221 has opened automatically due to the Safety Injection Signal.
B. CV-1221 received an open signal when Instrument Air header pressure lowered to
85 psig.
C. Due to the loss of operating air to CV-1221 operator, the valve failed OPEN.
D. The SIAS caused a shedding of Bus 1E, and a loss of control power to CV-1221,
failing it OPEN.

Answer 9

C. Due to the loss of operating air to CV-1221 operator, the valve failed OPEN.

Question 10

Which one of the fol/owing combinations describes which system pressure is sensed by CV-1212 (Service Air to Instrument Air cross-connect) AND the action this valve takes on LOWERING system pressure?

System Sensed
A. Instrument Air
B. Instrument Air
C. Service Air
D. Service Air

CV-1212 Response
Closes
Opens
Closes
Opens

Answer 10

A. Instrument Air, Closes

Question 11

From full power, a Safety Injection occurs, concurrent with a loss of Instrument Air.
Instrument Air pressure indicates 10 psig, and is lowering. Several minutes later, it is
noted that Station and FW Tie-In Control Valve, CV-1221 indicating RED light is ON.
The GREEN light is OFF. The handswitch remains selected to CLOSE. The NCO
confirms that NO operator action was taken to operate this control valve handswitch.
Which one of the following accounts for the status of CV-1221?
A. CV-1221 has opened automatically due to the Safety Injection Signal.
B. CV-1221 received an open signal when Instrument Air header pressure dropped to
85 psig.
C. Due to the loss of operating air to CV-1221 operator, the valve failed OPEN.
D. The SIAS caused a shedding of Bus 1E, and a loss of control power to CV-1221,
failing it OPEN.

Answer 11

C. Due to the loss of operating air to CV-1221 operator, the valve failed OPEN.

Question 12

With the plant operating in MODE 1, EK-11 02, “Instrument Air La Press” and EK-11 05,
“Air Compressors Stby Camp Running” annunciate on panel C-13. The crew enters ONP-7.1, “Loss of Instrument Air.” Instrument Air header pressure is 83 psig. Instrument Air Flow as read on FI-1210 reads 325 cfm. Instrument Air Dryer, M-2, pre-filter D/P indicates 3.7 psi. Which one of the following actions will help restore Instrument Air Pressure?
A. Bypass M-2, Instrument Air Dryer, and place both Air Dryer pre-filters in service.
B. Close Service Air Header Isolation valve, CV-1212
C. Raise cooling water flow to C-2A/B/C, Instrument Air Compressors.
D. Cross-tie T-9C, High Pressure Air Receiver, with Instrument Air.

Answer 12

A. Bypass M-2, Instrument Air Dryer, and place both Air Dryer pre-filters in service.

Question 13

The following conditions exist:
• Instrument Air Compressor C-2A control switch is in HAND.
• Instrument Air Compressors C-2B and C-2C control switches are in AUTO.
• Instrument Air Header is currently 95 psig and lowering.
Based upon above plant conditions, which of the following describes the response of
the Instrument Air System?
Instrument Air Compressors C-2B and C-2C will auto start when Instrument Air header
pressure sensed …
A. UPstream of the filter and dryer reaches 85 psig.
B. DOWNstream of the filter and dryer reaches 85 psig.
C. DOWNstream of the filter and dryer reaches 88 psig.
D. UPstream of the filter and dryer reaches 88 psig.

Answer 13

D. UPstream of the filter and dryer reaches 88 psig.

Question 14

The following conditions exist:
• Instrument Air Compressor C-2A control switch is in HAND.
• Instrument Air Compressors C-28 and C-2C control switches are in AUTO.
• Instrument Air Header is currently 95 psig and lowering.
If Instrument Air pressure continues to lower, which one of the following describes the
response of the Instrument Air System?
A. CV-1212, Service Air Isolation Valve, closes when pressure UPstream of the filter
and dryer reaches 85 psig.
B. CV-1212, Service Air Isolation Valve, closes when pressure DOWNstream of the
filter and dryer reaches 85 psig.
C. CV-1221, Service/lnstr Air Tie-In from FWP, opens when pressure UPstream of the
filter and dryer reaches 85 psig.
D. CV-1221, Service/lnstr Air Tie-In from FWP, opens when pressure DOWNstream of
the filter and dryer reaches 85 psig.

Answer 14

B. CV-1212, Service Air Isolation Valve, closes when pressure DOWNstream of the
filter and dryer reaches 85 psig.

Question 15

The PCS is being cooled down using manual control of the ADVs. What would be the
impact on the ADVs that are open if a Service Air line broke causing Service Air
pressure to drop to less than 70 psig?
A. Go closed due to loss of instrument air.
B. Remain open because of bulk nitrogen air backup to the ADVs.
C. Go closed because their air supply is isolated when CV-1212, service air isolation,
goes closed.
D. Remain open because instrument air pressure will be maintained when the leak is
automatically isolated.

Answer 15

D. Remain open because instrument air pressure will be maintained when the leak is
automatically isolated.

Response time = 4 minutes
D. is correct since low instrument air pressure will isolate the service air header and the leak.

Question 16

With the plant at full power, Instrument Air Compressor C-2A is RUNNING, C-2B and
C-2C are in AUTO and NOT running. The following valid alarms annunciate:
• EK-1101, CONTAINMENT INSTRAIR LO PRESS
• EK-1102, INSTRUMENT AIR LO PRESS
Several seconds later, EK-11 03, SERVICE AIR LO PRESS alarm annunciates.
Additional conditions:
• Instrument Air header pressure (as indicated on PIA-121 0) has stabilized at 82 psig.
• ONLY C-2A is running. C-2B and C-2C are NOT running.
• Local pressure indication for all three Instrument Air Receiver Tanks has stabilized
at approximately 105 psig.
• No manual operator action has been taken.
What is occurring, and what is the effect on plant equipment?
A. An air leak on the Service Air system DOWNstream of Service Air header isolation
CV-1212; the Cooling Tower Pumps trip on low makeup basin level signal.
B. High differential pressure on the in-service Instrument Air post-filter (F-5A/B); Track
Alley/VRS sprinkler systems actuate.
C. A leak on the Instrument Air system UPstream of the Instrument Air Dryer; Main
Transformer deluge system actuates.
D. Instrument Air Dryer temperature at 300°F; various air operated control valves
throughout the plant will begin spuriously changing position.

Answer 16

B. High differential pressure on the in-service Instrument Air post-filter (F-5A/B); Track
Alley/VRS sprinkler systems actuate.

Question 17

A painter accidentally stepped on a Instrument Air (IA) line in the plant near the
Shutdown Cooling Hx and broke it. The IA system was aligned normally with
compressor C-2A running. Instrument Air system pressure has lowered to 83 psig as a
result. What automatic action(s) will occur on the Instrument Air system as a result of
this leak?
A. Compressor C-2B and C-2C auto start and Service Air Header Isolation Valve
CV-1212 auto closes.
B. Compressor C-2B and C-2C auto start and Station and FW Tie-In Control Valve,
CV-1221 auto opens.
C. ONLY Compressor C-2B and C-2C auto start.
D. ONLY Service Air Header Isolation Valve CV-1212 auto closes.

Answer 17

No Answer Given

Question 18

The following plant conditions exist:
• Reactor Power 100%.
• Instrument Air Compressors C-2A in HAND.
• Instrument Air Compressor C-2B in AUTO.
• Instrument Air Compressor C-2C is OOS for maintenance.
• The Instrument Air system experiences a transient that momentarily dropped
pressure in the header to 86 psig. Pressure recovers within two (2) minutes and
stabilizes at 99 psig.
• Control Room alarm EK-1105, “AIR COMPRESSORS STANDBY COMP
RUNNING” is in alarm.
• Instrument Air Compressor, C-2B “RED” indicating light above the control switch
is on.
Ten minutes after C-2B started, the Auxiliary Operator calls to report that Instrument
Air Compressor, C-2B is not running.
This condition is present due to the fact that the Instrument Air Compressor, C-2B …
A. started in the loaded condition and therefore tripped on overcurrent
B. started and cycled on and off to maintain header pressure between 85-100 psig
C. started unloaded and therefore tripped on low lube oil pressure
D. ran unloaded for more than 6 minutes and then automatically shut down

Answer 18

D. ran unloaded for more than 6 minutes and then automatically shut down

Correct, since it was started on a transient and then the load returned to normal,
C-2A was able to maintain load. When this happens C-2B goes into ‘sleep’ mode
as described in the answer.

Question 19

A painter accidentally stepped on a Instrument Air (IA) line in the plant near the
Shutdown Cooling Hx and broke it. The IA system was aligned normally with
compressor C-2A running. IA system pressure has dropped to 83 psig as a result.
What automatic action(s) will occur on the IA system as a result of this leak?
A. Compressor C-2B and C-2C auto start and Service Air Header Isolation Valve
CV-1212 auto closes.
B. Instrument Air Low Pressure alarm annunciates and Shutdown Cooling Hx outlet
valve CV-3025 fails open.
C. ONLY Compressor C-2B and C-2C auto start.
D. ONLY Service Air Header Isolation Valve CV-1212 auto closes.

Answer 19

A. Compressor C-2B and C-2C auto start and Service Air Header Isolation Valve
CV-1212 auto closes.

Question 20

Instrument Air Compressor C-2A is in operation with the C-2B Compressor in standby.
C-2C Compressor is tagged out for maintenance. An air leak caused air header
pressure to drop to 85 psig prior to the leak being isolated at which time header
pressure returned to 110 psig. How would the C-2B Air Compressor respond to this
instrument air pressure transient?
A. C-2B will not auto-start during this instrument air transient
B. C-2B will auto-start and continue to run unloaded until placed in Standby by the
Control Room Operator
C. C-2B will auto-start, but will stop after running unloaded for a short period of time
D. C-2B will auto-start and run fully loaded until placed in Standby by the Control
Room Operator

Answer 20

C. C-2B will auto-start, but will stop after running unloaded for a short period of time

Question 21

The following plant conditions exist:
• The plant is in MODE 1 at 100% power
• Instrument Air Compressor C-2C is in Hand
• Instrument Air Compressors C-2A and C-2B are in Auto
• A significant Critical SW leak has occurred on the line supplying cooling water to
Instrument Air Compressor C-2C
What effect will this have on Instrument Air Compressor C-2C?
A. This will reduce cooling to the air compressor package and to the external
aftercooler. Operability of the air compressor C-2C is affected.
B. This will reduce cooling to the air compressor package and to the external
aftercooler. Output air qualify from the air compressor C-2C will be lower.
C. This will reduce cooling to the external aftercooler. Operability of the air
compressor C-2C is affected.
D. This will reduce cooling to the external aftercooler. Output air quality from the air
compressor C-2C will be lower.

Answer 21

D. This will reduce cooling to the external aftercooler. Output air quality from the air
compressor C-2C will be lower.

Question 22

The following plant conditions exist:
• Mode 1 Reactor Power 100%.
• Instrument Air Compressor C-2A in HAND.
• Instrument Air Compressors C-2B and C-2C in AUTO.
• The Instrument Air system experiences a transient that momentarily dropped
pressure in the header to 86 psig. Pressure recovers within two (2) minutes and
stabilizes at 99 psig.
• Control Room alarm EK-1105, “AIR COMPRESSORS STANDBY COMP
RUNNING” is in alarm.
• Instrument Air Compressors, C-2B and C-2C “RED” indicating light above the
control switch is on.
Fifteen (15) minutes after C-2B started, the Auxiliary Operator calls to report that
Instrument Air Compressors, C-2B and C-2C are not running.
This condition is present due to the fact that the Instrument Air Compressors, C-2B and
C-2C _____________.
A. started in the loaded condition and therefore tripped on overcurrent.
B. started and cycled on and off to maintain header pressure between 85-100 psig.
C. started unloaded and therefore tripped on low lube oil pressure.
D. ran unloaded for more than 6 minutes and 10 minutes respectively, then automatically shut down.

Answer 22

D. ran unloaded for more than 6 minutes and 10 minutes respectively, then automatically shut down.

Question 23

The following plant conditions exist:
• Mode 1 Reactor power 100%
• Instrument Air Compressor C-2A in Hand
• Instrument Air Compressors C-28 and C-2C in Auto
• Annunciator EK-11 01, “Containment Instrument Air Pressure Low” alarms
What control room indications can be used to validate this alarm?
A. CV-1212 position, Pressure reading on PT-1212 “Service Air Header Pressure”
B. CV-1221 position, Pressure reading on PT-1212 “Service Air Header Pressure”
C. CV-1221 position, Pressure reading on PT-121 0 “Instrument Air Header Pressure”
D. CV-1212 position, Pressure reading on PT-121 0 “Instrument Air Header Pressure”

Answer 23

C. CV-1221 position, Pressure reading on PT-121 0 “Instrument Air Header Pressure”

Question 24

With the plant at full power, the operating air to CV-1212, Service Air Isolation, is inadvertently isolated. As a result of this action, which of the following will occur within one minute?
A. BOTH Cooling Tower Pumps trip.
B. Makeup Basin level transmitter fails LOW.
C. Cooling Tower bypass valves begin to close.
D. P-5, Warm Water Recirc. Pump, trips, if it was running.

Answer 24

B. Makeup Basin level transmitter fails LOW.

Question 25

The consequence of high differential pressure across the Instrument Air System filters is:
A. Instrument Air header pressure could be lowered to Service Air header isolation
setpoint without picking up the AUTO start for the Standby air compressor.
B. Instrument Air header pressure could be lowered resulting in picking up the AUTO
start for the Standby air compressor.
C. Instrument Air flow through the in-service Instrument Air Dryer could be reduced
resulting in lower air quality.
D. Instrument Air flow through the regenerating Instrument Air Dryer could be reduced
resulting in overheating the air dryer.

Answer 25

A. Instrument Air header pressure could be lowered to Service Air header isolation
setpoint without picking up the AUTO start for the Standby air compressor.

Question 26

With the plant at full power, the operating air to CV-1212, Service Air Isolation, is inadvertently isolated. Once the air pressure bleeds down to 0 psig, which of the following will have occurred?
A. BOTH Cooling Tower Pumps have tripped.
B. Makeup Basin level transmitter failed LOW.
C. Cooling Tower bypass valves went closed.
D. P-5, Warm Water Recirc. Pump, tripped, if it was running.

Answer 26

B. Makeup Basin level transmitter failed LOW.

Question 27

With the plant at full power, Instrument Air Compressor C-2A is RUNNING, C-2B and
C-2C are in AUTO and NOT running.
The following valid alarms annunciate:
• EK-1101, CONTAINMENT INSTRAIR LO PRESS
• EK-1102, INSTRUMENT AIR LO PRESS
• Several seconds later, EK-11 03, SERVICE AIR LO PRESS annunciates.
Additional conditions:
• Instrument Air header pressure (as indicated on PIA-121 0) has stabilized at 82 psig.
• ONLY C-2A is running. C-2B and C-2C are NOT running.
• Local pressure indication for all three Instrument Air Receiver Tanks has stabilized at approximately 105 psig.
• No manual operator action has been taken.
What is occurring, and what is the effect on plant equipment?
A. An air leak on the Service Air system DOWNstream of Service Air header isolation
CV-1212; the Cooling Tower Pumps trip on low makeup basin level signal.
B. High differential pressure on the in-service Instrument Air post-filter (F-5A/B); Track
Alley/VRS sprinkler systems actuate.
C. A leak on the Instrument Air system UPstream of the Instrument Air Dryer; Main
Transformer deluge system actuates.
D. Instrument Air Dryer temperature at 300°F; various air operated control valves
throughout the plant will begin spuriously changing position.

Answer 27

B. High differential pressure on the in-service Instrument Air post-filter (F-5A/B); Track
Alley/VRS sprinkler systems actuate.

a. INCORRECT - If the leak is on service air system, containment and instrument air low pressure alarms would not come in and the standby air compressors would start. This is plausible if the student believes that the leak is large enough to affect the containment and instrument air systems.
b. CORRECT - this is the only possible choice that would cause service air isolation and the standby instrument air compressors to not start.
c. INCORRECT - Plausible if the student confuses that the setpoint for standby compressor start (88#) with the setpoint for low service air pressure (80#)
d. INCORRECT - Plausible if the student believes that a high temperature on the air dryer desiccant has caused it to malfunction.

Question 28

Plant conditions are:
• Mode 3
• Cooldown in progress with PCS 325°F
An Auxiliary Operator (AO) calls the Control Room to report that Nitrogen Backup
Station 5 supply valve to CV-3071, “HPSI P-66A SUBCOOLING” is closed.
What Technical Specifications, if any, applies for these conditions?
A. None, Nitrogen backup to CV-3071 is not applicable to Technical Specifications.
B. Technical Specification 3.5.2,”ECCS - Operating.”
C. Technical Specification 3.6.6, “Containment Cooling Systems.”
D. None, Nitrogen Backup to CV-3071 is only required to be operable in
Modes 1 and 2.

Answer 28

B. Technical Specification 3.5.2,”ECCS - Operating.”

Question 29

The following plant conditions exist:
• The plant is in MODE 1
• An auxiliary operator calls the Control Room to report that the PCV for Nitrogen
Station 3B, nitrogen backup to CV-3070, “HPSI P-66B Subcooling,” has failed. A leak is suspected.
• The nitrogen pressure is zero on the Station 3 B Header.
• A new bottle was not valved in as the AO believes that the nitrogen will quickly leak off.
What Technical Specification Actions are required, if any.
A. None. Technical Specifications are not applicable to nitrogen backup to CV-3070.
B. TS LCO 3.5.2 Action B, restore to operable in 72 hours.
C. TS LCO 3.5.2 Action A, restore to operable in 7 days.
D. TS LCO 3.5.2 Action D, enter TS 3.0.3.

Answer 29

B. TS LCO 3.5.2 Action B, restore to operable in 72 hours.

Question 30

Nitrogen STATION 5 provides a backup nitrogen supply to:
• CV-3001 and CV-3002, Containment Spray Isolation Valves
• CV-3071, Subcooling to HPSI Pump, P-66A
• CV-1221, Instrument Air to Containment
SOP-19, Instrument Air System, Attachment 2, states that the basis for the nitrogen
supply to CV-3071 is to ensure that it will …
A. OPEN CV-3071 and maintain operability of HPSI pump P-66A.
B. CLOSE CV-3071 and maintain operability of Spray pumps P-54B and P-54C.
C. CLOSE CV-3071 and maintain operability of HPSI pump P-66A.
D. OPEN CV-3071 maintain operability of Spray pumps P-54B and P-54C.

Answer 30

A. OPEN CV-3071 and maintain operability of HPSI pump P-66A.

Question 31

(SRO ONLY) The basis for supplying nitrogen backup to the Containment Spray Isolation Valves, CV-3001 and CV-3002, is to:
A. prevent mixing hydrogen and air in the Containment Spray following RAS.
B. maintain the capability to open CV-3001 or CV-3002 in the event of a CHP.
C. prevent overloading Containment Spray Pump P-54A following RAS by being capable of closing either CV-3001 or CV-3002.
D. prevent overloading Containment Spray Pump P-54A prior to RAS by being capable
of closing either CV-3001 or CV-3002.

Answer 31

C. prevent overloading Containment Spray Pump P-54A following RAS by being capable of closing either CV-3001 or CV-3002.