EO 1 BLOCK 4 Plant Ventilation

Question 1

MC State the purpose of Control Room Computer Room Chiller
A. Remove the heat from the Computer Room
B. Remove the Chill from the Room
C. Remove the heat from the Control Room
D. Supress the static electricity from the Computer Room

Answer 1

A

Question 2

Which ONE of the following describes the reason that ONE Chilled Water pump
is always selected to ON?
A. To ensure adequate heating of compressor lube oil
B. To avoid compressor shutdown on low suction pressure
C. To avoid excessive cycling of the liquid line solenoid valves
D. To ensure a continuous supply of chilled water to the Computer Room Chiller

Answer 2

D

Question 3

Which ONE of the following is NOT a function of the Control Room Emergency
Ventilation System?
A. To supply 100% outside air after 4 days of operation to limit the build-up of carbon
dioxide.
B. Ensures the ambient air temperature does not exceed allowable continuous duty
temperatures for control room instrumentation.
C. Ensures the control room will remain habitable for operations personnel.
D. Limit radiation exposure of control room personnel.

Answer 3

A

Question 4

Which ONE of the following is a function of the Control Room Emergency
Ventilation System?
A. Ensures the Control Room will remain habitable for operations personnel.
B. Limit radiation exposure of control personnel whole body exposure to 50 REM or less.
C. To supply 100% outside air after 4 days of operation to limit the buildup of carbon
dioxide.
D. Ensures the ambient air temperature does not exceed 125 °F peak temperature for
Control Room instrumentation.

Answer 4

A

Question 5

Which ONE of the following describes the intended design of the backup cooling
system of the Control Room Emergency Ventilation?
A. The WATER cooled condenser backs up the AIR cooled condenser if outside air
temperature is too high to provide cooling.
B. The AIR cooled condenser backs up the WATER cooled condenser if service water is
unable to provide proper cooling.
C. The WATER cooled condenser backs up the AIR cooled condenser in case a tornado
renders the air cooled condenser inoperable.
D. The AIR cooled condenser backs up the WATER cooled condenser in case the
refrigerant pressure is low.

Answer 5

B

Question 6

The following conditions exist:
0858
* Reactor power 100%
* RCS pressure 2155 psig
* RCS Tave 582 °F
* CTMT pressure 15 psia
At0900
* Reactor power 0%
* RCS pressure 500 psig
* RCS temperature 450 °F
* CTMT pressure 24 psia
At what time should the Control Room EVS be started?
A. 0910
B. 0920
C. 0930
D. 1000

Answer 6

A

Question 7

The plant is operating at 100% power when an SFAS SA-1 and SA-2 actuation
occurs.
The temperature in the control room is at 80°F and is rising.
Which ONE of the following actions should be performed by the Control Room
operator?
A. Verify that the Chill Water system is operating
B. Verify that the Computer Room A/C unit is operating.
C. Verify that the Control Room Emergency Ventilation System is operating.
D. Verify the Standby Control Room Ventilation system has started.

Answer 7

C

Question 8

The plant is in Mode 2 at 2% power during a plant startup. RE 4598 AA and RE
4598 BA were BOTH declared INOPERABLE 30 minutes ago. Which ONE of
the following actions is appropriate under these circumstances?
A. Start CREVS Trains 1 and 2 in the water-cooled mode.
B. Start CREVS Trains 1 and 2 in the air-cooled mode.
C. Enter Tech Spec 3.0.3 and comply with its ACTION STATEMENT.
D. Enter Tech Spec 3.3.3.6 and comply with the provisions of Tech Spec 3.0.4.

Answer 8

D

Question 9

During Zone 2 rounds, you notice the chilled water pump switches are in
following status:
Chilled Water Pump 1 switch in AUTO
Chilled Water Pump 2 switch in AUTO
You would:
A. AUTO is the normal Chilled Water Pump switch position for both pumps.
B. Verify that one Chilled Water Pump is running and one Chilled Water Pump is off.
C. Verify that both Chilled Water Pumps are off if chiller outlet temperature is less than 50F.
D. Contact the Unit Supervisor/Field Supervisor for direction since the Chilled Water
Pumps should not be run in AUTO.

Answer 9

D

Question 10

Which ONE of the following systems provides makeup water to the Auxiliary
Building Chilled Water System.
A. Demineralized Water
B. Service Water
C. Domestic Water
D. Fire Protection Water

Answer 10

C

Question 11

The most widely used refrigerant flow control used in air conditioning systems at
Davis-Besse is?
A. Capillary Tube
B. Low Side Float Valve
C. Automatic Expansion Valve
D. Thermostatic Expansion Valve

Answer 11

D

Question 12

In a Vapor Compression Air Conditioning System, which of the following
refrigeration cycle components is considered a flow control device?
A. Filter Dryer
B. Evaporator
C. Air Cooled Condenser
D. Thermal Expansion Valve

Answer 12

D

Question 13

In a Vapor Compression Air Conditioning System the refrigerant is in a super
heated vapor state in which of the following system sections?
A. In the air cooled condenser section only.
B. From the filter dryer to the inlet of the evaporator.
C. From the outlet of the condenser to the inlet of the evaporator.
D. From the outlet of the compressor to the inlet of the condenser.

Answer 13

D

Question 14

In a Vapor Compression Air Conditioning System the refrigerant between the
condenser and the thermal expansion valve can best be described by which of
the the following?
A. saturated liquid
B. high pressure subcooled liquid
C. low pressure super heated gas
D. high pressure super heated gas

Answer 14

B

Question 15

Which ONE of the following combinations describes the areas served by the
Control Room Emergency Ventilation System?
A. Cable Spread Room, Control Room
B. Control Room, Shift Manager’s Office
C. Control Room Ventilation Room, Computer Room
D. Shift Manager’s Office, Control Room Cabinet Room

Answer 15

B

Question 16

You are the Zone 2 operator.
A Reactor Coolant System leak has occurred resulting in an SFAS actuation.
You have just finished all required actions for placing CTRM EVS Train #1 in
service.
You hear a Gai-Tronics announcement which states, “Loss of Loop 1 service
water.”
Which ONE of the following actions will occur as a result of this condition?
A. CTRM EVS Train #1 compressor will TRIP due to low cooling water pressure.
B. CTRM EVS Train #1 compressor discharge pressure will increase due to low cooling
water flow until the system AUTOMATICALLY switches to the air cooled mode.
C. CTRM EVS Train #1 compressor will TRIP and CTRM EVS Train #2 compressor will
AUTO start to continue to provide CTRM cooling.
D. CTRM EVS Train #1 compressor discharge pressure will increase due to low cooling
water flow until the system is MANUALLY transferred to the air cooled mode.

Answer 16

B

Question 17

If the refrigerant pressure for the operating Control Room Emergency Ventilation
System train rises to 175 psig, the system will automatically shift to ___ .
A. air cooled mode
B. water cooled mode
C. recirc cooling mode
D. once through cooling mode

Answer 17

A

Question 18

SETPOINT REQUIRED.
What minimum differential pressure will cause the red “Filter Plugged” light on
the Control Room Normal HVAC Control Panel to come on?
A. 1.35” w.c.
B. 1.5” W.C.
C. 1.75” W.C.
D. 2.0” W.C.

Answer 18

A

Question 19

When Control Room Emergency Ventilation System is operating in the air a cooled mode.
What refrigerant pressure will the face dampers maintain by modulating open and closed as necessary?
A. 130 psig
B. 165 psig
C. 180 psig
D. 220 psig

Answer 19

A

Question 20

The Air Cooled Face Dampers (HV 4906 Train 1 and HV 4907 Train 2) are
energized between the months of October to May by using the SS-58 / SS-5A
(Train 1/2) AIR COOLED FACE DAMPER MANUAL BYPASS Switches.
Which ONE of the following is the reason the face dampers are energized?
A. To prevent freon from migrating up to the air coolers during extremely cold weather.
B. To keep the face dampers open to ensure they will provide cooling if needed.
C. To prevent the Control Room Emergency Ventilation System condenser from tripping
on high discharge pressure.
D. To keep the hydraulic oil in the dampers warm so that they can respond properly.

Answer 20

D

Question 21

You have just completed the procedure to start Control Room EVS Train 2.
While returning the procedure to the Control Room, the “RADIATION TRBL”
annunciator comes into alarm.
The Control Room Operator announces that RE 5328 (CTRM EVS 2) is in
alarm.
What automatic actions would you expect to occur?
A. CTRM EVS train 2 trips and CTRM EVS train 1 starts.
B. CTRM EVS train 2 remains operating and CTRM EVS train 1 starts.
C. CTRM EVS train 2 trips and CTRM EVS train 1 is unable to be started until the RE 5328
is reset.
D. None, CTRM EVS train 2 is still operating, CTRM EVS train 1 is shutdown.

Answer 21

D

Question 22

Which one of the following will result from a motor overload on a Control Room
Emergency Ventilation System fan?
A. The running fan trips
B. The backup fan starts
C. A white overload light comes on
D. A Control Room annunciator alarms

Answer 22

C

Question 23

You are performing a restoration from maintenance on the Chilled Water
System.
The Unit Supervisor directs you to place the chilled water pumps in AUTO.
You would:
A. Place them in AUTO and verify one pump is running and the other is off.
B. Place both in AUTO and verify at least one pump is running if chilled water temperature
is less than 50 °.
C. Inform him that the chilled water pumps should not be run in AUTO due to concerns
about station computer cooling.
D. Inform him both chilled water pumps should be running in AUTO at any given time.

Answer 23

C

Question 24

The plant experiences a Safety Features Actuation System Level 3 Actuation,
Which ONE of the following would you expect to happen?
A. Control Room Emergency Ventilation System Trains 1 and 2 automatically start if RE
5327 (5328) trips.
B. Normal Control Room Ventilation will trip and Control Room Emergency Ventilation
System Trains 1 and 2 will be manually started.
C. Normal Control Room Ventilation will trip, Control Room Emergency Ventilation System
Trains 1 and 2 automatically start if not previously running.
D. Control Room Emergency Ventilation System (EVS) Trains 1 and 2 will start
automatically as long as their Control Room switches were previously in AUTO.

Answer 24

B

Question 25

Both Control Room EVS trains are operating as a result of a Loss Of Coolant
Accident (LOCA).
Both Control Room EVS radiation monitors go into alarm.
Which ONE of the following actions should the Control Room Operator perform:
A. Stop both Control Room EVS trains.
B. Stop the Control Room EVS train with the highest activity.
C. Start one train of the normal Control Room ventilation system in the recirc mode.
D. Start both trains of the normal Control Room ventilation system in the recirc mode.

Answer 25

B

Question 26

Which ONE of the following is located in the Control Room?
A. Filter “PLUGGED” light for control room ventilation system.
B. Control room ventilation system discharge air temperature indicator.
C. Control Room Fan Area Equipment Room supply fan control HIS 5335.
D. Control Room Ventilation Isolation Valves damper control switches HIS 5301 and HIS
5311.

Answer 26

D

Question 27

Which ONE of the following will AUTOMATICALLY occur upon receipt of
annunciator 9-3-A, UNIT VENT RAD HI?
A. The Control Room Normal Ventilation System will shutdown.
B. The Control Room Emergency Ventilation system will start.
C. The Control Room Emergency Ventilation system radiation monitors will start.
D. The Control Room Normal Ventilation chilled water system will shutdown.

Answer 27

A

Question 28

Select which panel in the Control Room contains the indicating lights for the
Control Room HVAC dampers (5301, 5311, series)?
A. PAM Panel
B. Ventilation Panel
C. SFAS Panel
D. Engineered Safety Features Panel

Answer 28

C

Question 29

A WGDT Batch release is in progress when the following alarms are received:
9-3-A, UNIT VENT RAD HI
R840, Unit Vent Rad. RE 4598BNBB
R841, Unit Vent Rad. RE 4598ANAB
RE 4598AA and RE 4598BA indication continues to rise.
All equipment operates as designed.
Which one of the following describes the MINIMUM action required in the
Control Room?
A. Verify Control Room ventilation shuts down and HVAC dampers close. Verify at least
one train of the Control Room Emergency Ventilation automatically starts.
B. Place the Control Room ventilation in the recirculation mode. Manually start at least
one train of Control Room Emergency Ventilation.
C. Verify Control Room ventilation shuts down and HVAC dampers close. Manually start
BOTH trains of the Control Room Emergency Ventilation.
D. Place the Control Room ventilation in the recirculation mode. Verify BOTH trains of
Control Room Emergency Ventilation automatically start.

Answer 29

C

Question 30

In order to determine the Control Room area airborne radiation levels when the
Control Room Emergency Ventilation System (CTRM EVS) is operating, the
CTRM EVS radiation monitors draw an air sample from the _____ .
A. discharge of the CTRM EVS fans and returns the air sample to the supply ducts for the
control room.
B. filter housing outlet and return the sample to the supply ducts for the control room.
C. discharge of the CTRM EVS fans and return the air sample to the station vent.
D. filter housing outlet and returns the air sample to the station vent.

Answer 30

A

Question 31

Technical Specification LCO 3. 7.10 requires that two Control Room Emergency
Ventilation System trains must be OPERABLE ___ _
A. in Mode 1 only
B. in Modes 1 and 2 only
C. in Modes 1, 2, 3, and 4 only
D. in Modes 1, 2, 3, 4 and during the movement of irradiated fuel assemblies

Answer 31

C

Question 32

• The Plant is operating at 94% power.
• The Zone 2 operator is to perform a surveillance test on Control Room EVS
  Train 1.
• The operator discovers that the control switches for both Control Room EVS
  chiller units are in the “OFF” position.
  Which ONE of the following statements is correct concerning Control Room
  CREATCS?
  A. The system is still OPERABLE because the air cooled backup condenser was not
  affected.
  B. Declare CREATCS Train 2 INOPERABLE and restore it to OPERABLE status within
  seven days or be in Cold Shutdown within the next six hours.
  C. Declare both CREATCS Trains INOPERABLE and restore both switches to the “ON”
  position within seven days or be in Hot Standby within the next six hours.
  D. Declare both CREATCS Trains INOPERABLE, restore at least one of the switches to
  the “ON” position within one hour or be in Cold Shutdown within the next thirty-six
  hours.

Answer 32

D

Question 33

You are the Zone 2 operator.
The Control Room has directed you to reset the #1 Control Room water chiller unit which
maintenance suspects to have tripped on low oil pressure.
You should:
A. Allow a 5 to 10 minute cooling period before resetting the Control Room Water Chiller.
B. Wait a minimum 24 hours before resetting Control Room Water Chiller 1-1 to ensure proper oil
heating.
C. Restart the Control Room Water Chiller 1-1 immediately to avoid allowing the oil to cool down.
D. Take HIS 5274, Chilled Water System Chiller 1-1, to the OFF position and then back to the
AUTO position.

Answer 33

A