AO Block 4 Flashcards by Cody Rook

What are the Sub-systems of non-rad ventilation?

Aux building non-rad ventilation
- Low voltage switchgear room ventilation
- Battery room ventilation
- Main steam line room ventilation
- CCW room
- EDG rooms
- Aux Feed Pump room

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What is Non-rad ventilation purpose?

Provide conditioned air or local heating for areas to maintain temperature, prevent freezing, and provide a suitable environment for personnel

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The Auxiliary Building Nonradioactive Areas HV System shall maintain the space temperature between what?

104F - 60F

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The Auxiliary Building Nonradioactive Areas HV System shall maintain the space temperature , unless otherwise noted, during all modes of operation under the following two outside ambient conditions

Summer 95°F (dry bulb)/76°F (wet bulb)

Winter –10°F (dry bulb

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The basis for 104°F maximum temperature of the Auxiliary Building Non-Rad Ventilation is to meet what?

The equipment qualification requirements.

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CCW room fan cycles between __ and ___

99F - 80F

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CCW room dampers modulate when fan running maintains what temperature?

85F

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EDG rooms maintain between what temperatures?

90F - 60F

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What EDG rpm does the EDG room ventilation turn on?

40rpm

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AFP room auto cycles between what temperatures?

104F and 80F

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List five (5) lube oil tanks that are part of the lube oil purification, transfer, and storage system.

New lube oil storage tank

Used lube oil storage tank

T-G lube oil tank

MFPT lube oil tank 1 and 2

MFPT used lube oil tank

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Why are accumulated water vapors in the TGLO tank an operational concern?

Formation of rust in the tank

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The Vapor Extractor on the Turbine Generator Lube Oil Tank ________________.

A. is used primarily to remove water vapor.

B. is used primarily to remove accumulated nitrogen gas.

C. causes excessive dirt and water to be drawn into the oil.

D. is used primarily to prevent cavitation of the motor suction pump.

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Where is the Main Turbine Lube Oil Tank LEVEL normally read and what is the normal operating level?

TG Lube Oil Tank room - normal 5 ft.

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Normal level in the T-G Lube Oil Tank should be _____ inches from the bottom of the tank.

A. 60”

B. 50”

C. 40”

D. 32”

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All objects must be removed from the Turbine Generator Lube Oil tank hatches prior to starting the system to ensure _____________.

A. the hatches function as an explosion - relief device

B. class “A” housekeeping requirements are maintained

C. a slight positive pressure is maintained by the vapor extractor

D. accessibility for performance of level alarm float switch maintenance

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Choose the correct value for the high differential pressure setpoint on the Kadon Lube Oil purification skid.

A. 5 psid
B. 15 psid
C. 25 psid
D. 100 psid

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Which ONE (1) of the following describes the operation of the Air Detraining Section within the Turbine Generator Lube Oil Tank?

A. Reduces turbulence of oil in high flow areas of the tank by use of a vertical baffle

B. Promotes evaporation of water by use of a vapor extractor

C. Removes air from the tank atmosphere by use of a vapor extractor

D. Reduces turbulence of oil in high flow areas of the tank by use of 2 fine mesh screens

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Who must approve any lube oil transfer to the Main Feed Pump Turbine Lube Oil Tank?

A. The Test/Performance Engineer

B. The Maintenance Manager

C. The Lube Room Supervisor

D. The Fire Protection Engineer

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State the purpose of the Kaydon Lube Oil Conditioner

The conditioner removes particulate impurities and a coalescing
filter to remove water. An acceptable answer to include both particulate and water.

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New Lube Oil should be transferred to the Main Feed Pump Turbine Lube Oil Tank via the?

A. Used Lube Oil Tank

B. Main Lube Oil Reservoir

C. Kaydon Lube Oil Conditioner

D. Portable Lube Oil Transfer Pump

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State the purpose of the 480 Volt Electrical Distribution System.

Receives power from the 13.8kV and 4160 V (.5) buses through unit substations to provide power to motor control centers

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The ____________ system receives power from the 4160 VAC and
____________ system via unit substations to provide power to motor control centers.

A. 120 VAC; 480 VAC

B. 480 VAC; 345 Kv

C. 240 VAC; 13.8 Kv

D. 480 VAC; 13.8 Kv

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A lockout on __________ will cause the Emergency Instrument Air compressor to shut down.

A. Bus A

B. Bus D1

C. Bus D2

D. Bus Tie Transformer AC

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The following conditions have been noted:
* HIS 6227, control switch for essential 480 VAC transformer AC1CE12 green and red lights are OFF.
* BOTH light bulbs have been verified as operational.
* II 6227, BUS C1 TO XFMR CE1-2 current indicates 5 AMPS.
* II 6226, BUS C1 TO XFMR CE1-1 current indicates 40 AMPS.
Which ONE of the following statements explains this set of conditions?

A. Transformer CE1-1 is supplying E1, breaker AC1CE12 is racked out.

B. Transformer CE1-1 is supplying E1, the Emergency Control Transfer Switch for AC1CE12 is in LOCAL.

C. Transformers CE1-1 and CE1-2 are BOTH supplying E1,
BOTH Emergency Control Transfer Switches are in NORMAL.

D. Transformer CE1-2 is supplying E1, breaker AC1CE11 is OPEN
the Emergency Control Transfer Switch for AC1CE12 is in LOCAL.

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From the Control Room a transfer of Unit Substation E1 from one source to another utilizes __________ and the transfer can __________ transfer.

A. a single switch; be EITHER a live or dead

B. a single switch; ONLY be performed as a dead

C. 2 separate switches; ONLY be performed as a dead

D. 2 separate switches; be EITHER a live or dead

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Which ONE of the following Motor Control Centers has a Kirk Key interlock associated with it?

A. EF12D

B. E22B

C. F22B

D. F31A

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Which ONE of the following conditions will NOT cause annunciator 1-3-C, XFMR CE1-1 TRBLE to alarm?

A. Transformer CE1-1 low liquid level

B. Transformer CE1-1 low liquid temperature

C. Transformer CE1-1 pressure relief operation

D. Transformer CE1-1 high tank pressure

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Which ONE of the following sets of 480 Volt Buses are required to be operable in accordance with Technical Specifications while operating at 100% power?

A. E1 and F1

B. E1 and F2

C. E2 and F1

D. E2 and F2

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The green light being OFF above the Control Room control switch for a 480V Unit Substation Breaker indicates _____.

A. The breaker is racked in to the TEST position

B. The breaker is racked in to the OPERATE position

C. DC voltage is NOT available to the breaker TRIP coil

D. DC voltage is NOT available to the breaker CLOSE coil

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Which ONE of the following choices represents the correct flowpath order from HIGH voltage to LOW voltage of the listed components?
1. BD Transformer
2. 480 VAC Motor Control Center F12B
3. 4160 VAC Bus D2
4. Unit Substation F1

A. 1, 2, 4, 3

B. 1, 3, 4, 2

C. 3, 1, 2, 4

D. 4, 1, 3, 2

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How many transformers will be energized as a result of CLOSING a 13.8 KV breaker to energize a non-essential substation?

A. 1

B. 2

C. 3

D. 4

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Which ONE of the following choices represents the correct flowpath order from HIGH voltage to LOW voltage of the listed components?
1. AC Transformer
2. Motor Control Center E12B
3. Bus C2
4. Unit Substation E1

A. 1, 2, 4, 3

B. 1, 3, 4, 2

C. 3, 1, 2, 4

D. 4, 1, 3, 2

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A. Transformer CE1-1 is supplying E1,breaker AC1CE12 is racked out.

B. Transformer CE1-1 is supplying E1, the Emergency Control Transfer Switch for AC1CE12 is in LOCAL.

C. Transformers CE1-1 and CE1-2 are BOTH supplying E1,
BOTH Emergency Control Transfer Switches are in NORMAL.

D. Transformer CE1-2 is supplying E1, breaker AC1CE11 is OPEN the Emergency Control Transfer Switch for AC1CE12 is in LOCAL.

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Which ONE of the following is NOT an automatic shutdown of the Miscellaneous Diesel Generator?

A. Lube Oil pressure reads 8 psi.

B. Engine speed reads 2000 RPM

C. Coolant Temperature reads 210 F

D. Overcrank - engine cranks for 90-100 seconds without starting

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Which ONE of the following is NOT an automatic shutdown of the Miscellaneous Diesel Generator?

A. High crank case pressure ( 5 psig)

B. Unloaded in auto ( 5 minutes)

C. Overspeed (2070 RPM)

D. High coolant temperature (205 F.)

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During a loss of offsite power the Miscellaneous Diesel Generator will start and supply electrical power to security systems via Motor Control Center:

A. E43

B. F71

C. E11C

D. E23A

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There are ____ Emergency Lighting Panels in the plant which NORMALLY are powered from E5 and F5 and receive EMERGENCY backup power from ____ .

A. 4, the DC MCC 250 VDC buses.

B. 4, battery BA and BB.

C. 6, the DC MCC 125 VDC buses.

D. 6, individual 8-hour battery packs.

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A typical emergency lighting panel can be supplied from 2 separate sources, with one being ____________ and the other being _______________ via an automatic bus transfer device.

A. 120 VAC bus; 250VDC MCC

B. internal batteries; 480 VAC bus

C. substation E5 or F5; 250VDC MCC

D. substation E5 or F5; internal batteries

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A lockout on __________ will cause the Emergency Instrument Air compressor to shut down.

A. Bus A

B. Bus D1

C. Bus D2

D. Bus Tie Transformer AC

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When transferring from the Normal to Alternate Transformer for non essential bus E2 using the Control Room switch,
The normal breaker will open:

A. as soon as the alternate source breaker closes.

B. when the synchro check relays energize for the alternate source.

C. after the control switch is held in the “Alternate” position for 5 seconds.

D. when the breaker control switch is released and returns to it’s mid position.

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Which ONE of the following conditions will NOT cause annunciator 1-4-C XFMR CE1-2 TRBLE to alarm?

A. Transformer CE1-2 pressure relief operation

B. Transformer CE1-2 tank pressure <5.5 psig vacuum

C. Transformer CE1-2 liquid temperature <90 degrees C

D. Transformer CE1-2 liquid level 17.5” below handhole

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Which ONE of the following conditions will result in annunciator 1-2-I XFMR DF1-2 FAULT going into alarm?

A. F1 Bus overcurrent

B. Loss of DC control power for F1 Bus

C. Transformer DF 1-2 High liquid temperature

D. Ground fault as sensed on ground detection panel C4621A

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From the Control Room a transfer of Unit Substation E1 from one source to another utilizes __________ and the transfer can _________ transfer.

A. a single switch; be EITHER a live or dead

B. a single switch; ONLY be performed as a dead

C. 2 separate switches; ONLY be performed as a dead

D. 2 separate switches; be EITHER a live or dead

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A lockout on __________ will cause the Emergency Instrument Air compressor to shut down.

A. Bus A

B. Bus D1

C. Bus D2

D. Bus Tie Transformer AC

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Which ONE of the following Motor Control Center’s (MCC) has a Kirk Key interlock associated with it?

A. EF15

B. E22A

C. F23B

D. F61

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The emergency lighting panels powered from E5 & F5 get their alternate power from _________.

A. 480 VAC Essential bus E1

B. 250 VDC Motor Control Center’s

C. 480 VAC Essential bus F1

D. 120 VAC Essential panel YE1

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Which ONE of the following is NOT an automatic shutdown of the Miscellaneous Diesel Generator?

A. Lube Oil pressure reads 8 psi.

B. Engine speed reads 2000 RPM

C. Coolant Temperature reads 210 F

D. Overcrank - engine cranks for 90-100 seconds without starting

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Which ONE of the following is NOT an automatic shutdown of the Miscellaneous Diesel Generator?

A. High crank case pressure ( 5 psig)

B. Unloaded in auto ( 5 minutes)

C. Overspeed (2070 RPM)

D. High coolant temperature (205 F.)

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The emergency lighting panels powered from E5 & F5 get their alternate power from _________.

A. 480 VAC Essential bus E1

B. 250 VDC Motor Control Center’s

C. 480 VAC Essential bus F1

D. 120 VAC Essential panel YE1

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There are ____ Emergency Lighting Panels in the plant which NORMALLY are powered from E5 and F5 and receive EMERGENCY backup power from ____

A. 4, the DC MCC 250 VDC buses.

B. 4, battery BA and BB.

C. 6, the DC MCC 125 VDC buses.

D. 6, individual 8-hour battery packs.

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The function of the Switchyard DC Network is ___________.

A. to provide a source of power for starting the Miscellaneous Diesel Generator

B. to provide power for various metering and relay circuits in the switchyard

C. to provide control power for operation of the switchyard breakers

D. to provide power to the alarm panel in the Relay House

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Which of the following Relay House Loads is supplied by an automatic bus transfer device?

A. Switchyard Air Compressors, Relay House HVAC Unit

B. Switchyard Air Compressors, L3 Distribution Panel

C. Battery Charger CA, Relay House HVAC Unit

D. L3 Distribution Panel and Battery Charger CA

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A. 1, 2, 4, 3

B. 1, 3, 4, 2

C. 3, 1, 2, 4

D. 4, 1, 3, 2

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Which ONE (1) of the following 480 volt MCCs is energized by depressing a rocker arm switch that energizes an internal contactor?

A. F13

B. EF12C

C. EF12D

D. EF15

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When placing the local disconnect switch for a 480 VAC essential component in the “local” position. The Control Room:

A. will have no remote control of the component.

B. will be able to only OPEN the components breaker.

C. will be able to place the component in it’s Safe Shutdown position if it has one.

D. will be able to operate the component only if it is a support system required to be operable during accident conditions.

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The emergency lighting panels powered from E5 & F5 get their alternate power from _________.

A. 480 VAC Essential bus E1

B. 250 VDC Motor Control Center’s

C. 480 VAC Essential bus F1

D. 120 VAC Essential panel YE1

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There are ____ Emergency Lighting Panels in the plant which NORMALLY are powered from E5 and F5 and receive EMERGENCY backup power from ____ .

A. 4, the DC MCC 250 VDC buses.

B. 4, battery BA and BB.

C. 6, the DC MCC 125 VDC buses.

D. 6, individual 8-hour battery packs.

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A typical emergency lighting panel can be supplied from 2 separate sources, with one being ____________ and the other being _______________ via an automatic bus transfer device.

A. 120 VAC bus; 250VDC MCC

B. internal batteries; 480 VAC bus

C. substation E5 or F5; 250VDC MCC

D. substation E5 or F5; internal batteries

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Which ONE of the following could be a common cause for the BUS E1 TRBL and BUS C1 BKRS NTNM annunciators in alarm?

A. 480 VAC Breaker BCE11 spuriously tripped open.

B. Ground fault on 4160/480 VAC transformer CE1-1.

C. Bus fault on 4160 VAC Bus C1.

D. 4160 VAC Breaker AC1CE11 spuriously tripped open.

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Which ONE of the following statements is correct concerning the Station Lighting System?

A. A transfer of Unit substation F5 from NORMAL to ALTERNATE is usually a live transfer.

B. A transfer of Unit substation E5 from ALTERNATE to NORMAL is always a dead transfer because of a kirk key interlock.

C. The normal method of transferring Unit substation E5 will not result in any momentary loss of lighting in any areas of the plant.

D. All transfers of Unit substations E5 and F5 are designed to be live transfers to prevent loss of lighting to any essential areas of the plant.

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There are ____ Emergency Lighting Panels in the plant which NORMALLY are powered from E5 and F5 and receive EMERGENCY backup power from ____
.
A. 4, the DC MCC 250 VDC buses.

B. 4, battery BA and BB.

C. 6, the DC MCC 125 VDC buses.

D. 6, individual 8-hour battery packs

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Which ONE of the following specifies how long the Updated Safety Analysis Report assumes that control room instrumentation is designed to continue to operate during a loss of all AC power?

A. 30 minutes

B. 60 minutes

C. 120 minutes

D. 180 minutes

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The purpose of the Instrument AC System is to provide reliable, __________.

A. BACKUP redundant 120 VDC power to NORMAL DC instrumentation

B. BACKUP redundant 120 VAC power to 125 VDC instrumentation

C. Redundant 120 VAC power to NORMAL AC instrumentation

D. Redundant 120 VAC power to 125 VDC instrumentation

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Which ONE of the following completes the following statement concerning instrument AC loads and their respective power supplies? The normal feed to __________ is __________, and an alternate feed is ______________.

A. SFAS Channel 1; Y1 from inverter YV1; Y1 from voltage regulator XY1.

B. Post Accident Channel 2; Y1 from inverter YV1; Y1 from voltage regulator XY1.

C. ARTS Channel 3; Y1 from inverter YV1; Y1 from voltage regulator XY1.

D. SFRCS Channel 4; Y4 from inverter YV4; Y4 from voltage regulator XY4.

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The Post Accident Monitoring instruments are powered from which ONE of the following?

A. Non-Nuclear Instrumentation

B. Essential Instrument AC

C. Uninterruptable Instrument AC

D. Nonessential DC

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Which ONE of the following completes the following statement concerning instrument AC loads and their respective power supplies? The normal feed to __________ is __________.

A. RPS Channel 2; Y1

B. RPS Channel 4; Y3

C. SFRCS Channel 1; Y1

D. SFRCS Channel 3; Y3

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Alternate AC power to the Essential Instrument Buses Y1 through Y4 is provided from _____.

A. Essential Powered Rectifiers

B. Non-Essential Powered Rectifiers

C. Essential Powered Constant Voltage Transformers

D. Non-Essential Powered Constant Voltage Transformers

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Inverter YVA is NORMALLY powered by __________, but will
AUTOMATICALLY transfer to __________ via action of a static transfer switch.

A. non-essential 480 VAC; non-essential 120 VAC

B. non-essential 480 VAC; essential 120 VAC

C. 250 VDC; non-essential 120 VAC

D. 250 VDC; essential 120 VAC

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The __________ is provided to allow automatic live transfer of Inverters YV1 through YV4 to alternate.

A. out of phase device

B. synchronizing reference signal

C. synchrocheck relay

D. automatic bus transfer device

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Which ONE of the following correctly describes Instrument AC System essential power supplies?

A. Y1 is normally powered from inverter YV1, with alternate power supplied to YV1 automatically from voltage regulator XY1.

B. Y2 is normally powered from inverter YV2, with alternate power supplied to YV2 automatically from voltage regulator XY4.

C. Y3 is normally powered from inverter YV3, with alternate power supplied to YV3 manually from uninterruptable bus YAU.

D. Y4 is normally powered from inverter YV4, with alternate power supplied to YV4 manually from uninterruptable bus YBU.

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Which ONE of the following is NOT correct concerning Instrument AC loads and their respective power supplies?
The NORMAL feed to _______ is _________ and an ALTERNATE feed is _______________.

A. SFAS Channel 1; Y1 from inverter YV1; Y1 from voltage regulator XY1.

B. Post Accident Channel 2; Y1 from inverter YV1; Y1 from voltage regulator XY1.

C. ARTS Channel 3; Y3 from inverter YV3; Y3 from voltage regulator XY3.

D. RPS Channel 4; Y4 from inverter YV4; Y4 from voltage regulator XY4.

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The following plant conditions exist:
* The plant is operating at 85% power.
* 4.16 KV Bus C1 is de-energized due to a bus lockout.
* No operator actions have been taken.
Which one of the following describes the electrical supply to Essential Instrument Distribution Panel Y1?

A. Rectified power from E12A through Inverter YV1.

B. E16A through a constant voltage transformer via the Static Transfer Switch on Inverter YV1.

C. DC Distribution Panel D1P supplied from Battery Charger DBC1P through Inverter YV1.

D. DC Distribution Panel D1P supplied from the Station Battery 1P through Inverter YV1.

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Which ONE of the following conditions will result in Control Room annunciator 1-6-A, INV YV1-YV3 TRBL being LIT?

A. LOW AC Output Current

B. Inverter Cabinet fans OPERATING

C. LOW Inverter Cabinet Temperature

D. LOW AC Output Voltage

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Which ONE of the following conditions will NOT result in Control Room annunciator 1-6-A, INV YV1-YV3 TRBL being LIT?

A. HIGH DC Current

B. HIGH AC Output Current

C. LOW DC Voltage

D. LOW AC Output Voltage

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Which ONE of the following conditions will result in Control Room Annunciator 1-6-A, INV YV1-YV3 TRBL being lit?

A. YV1 DC input voltage at 110 VDC

B. Power for YV1 supplied from transformer XY1

C. YV3 sync reference at 60 HZ

D. YV3 AC output voltage at 116 VAC

Which ONE of the following is the cause of the ALTERNATE SOURCE TO LOAD (Red) indicating light on YV4?

A. D2N is supplying Y4

B. F16A is supplying Y4

C. The FUSE between YRF4 and XY4 is open

D. The DIODE between YRF4 and YV4 is shorted

Which ONE of the following is the cause of the ALTERNATE SOURCE TO LOAD (Red) indicating light on YV4?

A. D2N is supplying Y4

B. F16A is supplying Y4

C. The FUSE between YRF4 and XY4 is open

D. The DIODE between YRF4 and YV4 is shorted

The SYNC MONITOR light on YV2 is normally OFF.
Which ONE of the following will cause it to ILLUMINATE?

A. The inverter is looking for an in-sync supply for power.

B. The inverter is in proper phase to be paralleled with a load.

C. Difference in current and voltage of the inverter to reference.

D. Difference in Phase or Voltage between the inverter and its reference

During Mode(s) _____ four essential instrument AC busses are required to be OPERABLE, while in Mode(s) _____ only three are required.

A. 1, 2, 3, 4 and 6; 5

B. 1, 2, 3 and 4; 5 and 6

C. 1, 2, 3 and 6; 4 and 5

D. 1, 2 and 3; 4 through 6

The following plant conditions exist:
* The plant is in a refueling outage
* All Train 1 Battery Chargers will be removed from service for maintenance
* When transferring 120V AC Bus YAU to Alternate (YAR), the Inverter YVA Battery Input breaker and DC supply breaker (D116) were left closed
What effect, if any, will leaving the above DC breakers closed have after the battery chargers are removed from service?

A. No effect

B. Discharge of the Train 1 batteries

C. Crosstie of the Train 1 and Train 2 batteries

D. YVA Battery Input Breaker trips on undervoltage

Under normal conditions, Station DC is kept from supplying the essential Instrument AC busses by means of __________.

A. relays that actuate on LOW 120 VAC bus voltage

B. the higher voltage output of the rectifier against the diode

C. a break-before-make switch on the output of the rectifier

D. a normally OPEN disconnect between the DC input and the output of the inverter

The ______ is provided to allow MANUAL LIVE transfer of Inverters YV1
through YV4 to essential ALTERNATE.

A. static transfer switch

B. synchronizing reference signal

C. synchrocheck relay

D. automatic bus transfer device

The plant is at 85% power when 4160 VAC Bus C1 is de-energized due to a bus fault. Assuming no actions are taken by the crew, which ONE of the following describes the electrical supply to Essential Instrument Distribution Panel Y1?

A. Rectified power from E12A through Inverter YV1

B. E16A through a constant voltage transformer via the Static Transfer Switch on Inverter

C. DC Distribution Panel D1P supplied from Battery Charger DBC1P through Inverter YV1

D. DC Distribution Panel D1P supplied from the station battery 1P through Inverter YV1

Under normal conditions, Station DC is kept from supplying the essential Instrument AC busses by means of __________.

A. relays that actuate on LOW 120 VAC bus voltage

B. the higher voltage output of the rectifier against the diode

C. a break-before-make switch on the output of the rectifier

D. a normally OPEN disconnect between the DC input and the output of the inverter

The is provided to allow MANUAL LIVE transfer of Inverters YV1
through YV4 to essential ALTERNATE.

A. static transfer switch

B. synchronizing reference signal

C. synchrocheck relay

D. automatic bus transfer device

Bus D1 lockout occurred two minutes ago.
Prior to any Operator actions, 120V AC Bus Y4 power, if any, is being supplied from:

A. Nowhere - Y4 has no power

B. Rectifier YRF4 via Inverter YV4

C. 125V DC Panel D2N via Inverter YV4

D. Voltage Regulator XY4 via Inverter YV4

A lead acid battery stores electricity:

A. Thermally

B. Mechanically

C. Electrically

D. Chemically

Which one of the following combinations describes the purposes of the StationDC Distribution System?
1. Provides continuous, reliable, and redundant 480/240/120 VAC power to DC loads.
2. Consists of DC loads for NORMAL operation and for orderly SHUTDOWN and control of the station.
3. Provides reliable redundant power to ECCS pumps.
4. Provides continuous, reliable and redundant 250/125 VDC power for DC loads.
5. Provides emergency lighting for the Turbine Building, Water Treatment Building, Auxiliary Building and Containment.

A. 1, 2, 5

B. 1, 3

C. 3, 4, 5

D. 2, 4

Which ONE of the following times is the period the station batteries are expected to supply their DC and Instrument AC loads AFTER the loss of the battery charger supply?

A. One (1) hour

B. Two (2) hours

C. Four (4) hours

D. Eight (8) hours

Which of the following loads are ALL powered from a DCMCC 250 Volt bus ?
1. Emergency Lighting panels
2. Reactor Coolant Pump backup oil lift pumps
3. Makeup Pump Auxiliary Oil Pump
4. Main Feed Pump Turbine Emergency Bearing Oil Pump
5. Turning Gear Oil Pump
6. UPS Inverters YVA/YVB
7. Essential Distribution Panel D1P

A. 1, 2, 3, 4

B. 2, 3, 4, 5

C. 3, 4, 5, 6

D. 4, 5, 6, 7

Which ONE of the following will be affected by a failure of the 125 VDC Battery Bus 1P?

A. Emergency Seal Oil Pump

B. Decay Heat Removal Pump 1 DC lube oil pump

C. High Pressure Injection Pump 1 DC lube oil pump

D. AFPT 2 Main Steam Line 2 Isolation Valve MS107

MC Which ONE of the following identifies a combination of loads which are ALL powered from DC MCC 1?
1. Reactor Coolant Pump 1-1 DC Lift Pump
2. Reactor Coolant Pump 2-1 DC Lift Pump
3. Emergency Seal Oil Pump
4. Emergency Bearing Oil Pump (Main Turbine)
5. Inverter YVA
6. Inverter YVB
7. #1 High Pressure Injection DC Lube Oil Pump
8. #2 Makeup Pump DC Lube Oil Pump

A. 1, 3, 6, 8

B. 1, 4, 5, 7

C. 2, 3, 6, 7

D. 2, 4, 5, 8

Station DC is PREVENTED from NORMALLY supplying ESSENTIAL Instrument AC busses by means of ________.

A. relays which will be actuated on LOW 120 VC bus voltage.

B. reverse biased coupling diodes between the DC and AC sources.

C. a normally OPEN disconnect between the DC and AC sources.

D. a filtration multivibrator type blocking circuit on the output of the rectifier.

Which ONE of the following supplies power to ESSENTIAL Instrument AC busses Y1 and Y1A if ESSENTIAL 480 VAC substation E1 is DEENERGIZED?

A. XY1

B. F1

C. YV2

D. D1P

Which ONE of the following explains what prevents YRF1 from backfeeding to D1P?

A. YRF1 is the ALTERNATE supply feed to D1P.

B. Coupling diodes between D1P and YRF1 are NORMALLY reverse biased.

C. D1P NORMALLY operates at a HIGHER voltage than YRF1.

D. The static switch on YRF1 is usually in the NORMAL mode.

Which ONE of the following explains what prevents Essential Station DC from always supplying Essential Instrument AC?

A. Essential Station DC is the NORMAL power supply to the Essential Inverter.

B. The Essential Rectifier NORMALLY operates at a higher voltage than Essential Station DC.

C. Diodes prevent the NORMAL DC current flow to the Essential Constant Voltage Transformer.

D. The Essential Constant Voltage Transformer is the DC BACKUP power supply to the Essential Instrument AC Bus thru the static switch.

Which ONE of the following combinations correctly identifies the NORMAL power path from a station battery charger to a load off nonessential DC panel DBN?

A. Battery charger 2P to Bus 2PN to Bus 2N to Panel D2N to Panel DBN.

B. Battery charger 2N to Bus 2PN to Bus 2P to Panel D2P to Panel DBN.

C. Battery charger 2P to Bus 2P to Panel D2P to Panel DBN.

D. Battery charger 2N to Bus 2N to Panel D2N to Panel DBN.

Which ONE of the following combinations lists the conditions, which will cause annunciator 1-6-E, DC BUS 1 TRBL, to alarm in the Control Room?
1. 400 amps on EITHER battery
2. 127.1 VDC on the negative OR positive bus of DCMCC1
3. 440 VAC on ANY #1 side battery charger INPUT
4. 118 VDC on the negative OR positive bus of DCMCC1
5. Battery Room Ventilation LOW flow
6. Charger INPUT voltage <480 VAC
7. 147.9 VDC on the negative OR positive bus of DCMCC1

A. 1, 3, 6

B. 1, 5, 7

C. 2, 3, 7

D. 2, 4, 6

Which ONE of the following conditions will NOT result in Control Room annunciator 1-6-E, DC BUS 1 TRBL being LIT?

A. LOW output voltage (undervoltage) on bus 1P.

B. HIGH output voltage (overvoltage) on bus 1N.

C. LOW input voltage (undervoltage) to charger 1P.

D. HIGH input voltage (overcharge) to charger 1N.

What is the required voltage range for a battery charger on Float?

A. 110 to 120 volts

B. 120 to 130 volts

C. 130 to 140 volts

D. 140 to 150 volts

Battery Charger DBC 1PN is aligned in the STANDBY lineup.
The AC input breaker will be ________.
The output transfer switch will be ________.
The DC output breakers will be ________.

A. Closed; Off (0); Open.

B. Open; Off (0); Closed.

C. Closed; On (1 or 2); Open.

D. Open; On (1 or 2); Closed.

The following plant conditions exist:
* Reactor power is 100%.
* Make-Up pump 2 is running.
A lockout of 4160 VAC, D1 bus occurs.
Which ONE of the following would indicate HIGHER than normal in this situation? (NO operator actions have been taken.)

A. Battery 1P amps

B. Battery 2N amps

C. Charger DBC 1P amps

D. Charger DBC2N amps

A lockout of D1 bus has occurred. Which ONE of the following indications would be expected on Control Room indicators in this situation? (NO operator actions have been taken.)

A. II6284, Charger DBC2N amps, indicates HIGHER than normal.

B. II6290, Battery 2N amps, indicates HIGHER than normal.

C. II6289, Battery 1P amps, indicates HIGHER than normal.

D. II6283, Charger DBC1P amps, indicates HIGHER than normal.

Which ONE of the following combinations describes the CONTROL ROOM INDICATION provided for the DC distribution system?
1. Individual cell voltages
2. Charger INPUT and OUTPUT voltages
3. Battery amps
4. Battery breaker positions
5. Charger amps
6. 250V bus voltages
7. Charger breaker positions
8. 1P, 1N, 2P, 2N voltages
9. Charger overload lights

A. 1, 3, 6, 7

B. 2, 3, 5, 7

C. 3, 4, 8, 9

D. 3, 5, 6, 8

A battery is a device that:

A. Stores energy as a chemical potential and releases it as electrical energy.

B. Stores energy as a mechanical potential and releases it as electrical energy.

C. Changes electrical energy to mechanical energy.

D. Changes thermal energy to electrical energy.

Two conditions which would result in a station battery discharge are when DC loading temporarily exceeds charger capacity and upon __________.

A. battery disconnects being open

B. loss of control power to the battery

C. loss of AC input to the battery charger

D. battery being placed on equalize

Which one of the following describes Control Room indications for the Station DC System if F1 were to be deenergized?

A. No change in Control Room indication except light status..

B. Current flow from Y1 and Y1A would increase.

C. Current flow from the train 2 batteries would be higher.

D. Only local indication exists for this transient.

Which ONE of the following conditions will result in HIGHER than normal DISCH amperage being seen on II6291, Battery 1N amps?

A. LOCKOUT of 4160VAC bus D1 on ground overcurrent.

B. FAILURE (loss of DC output) of regulated rectifier YRF3.

C. AC input breaker OPEN for charger 1P.

D. LOCKOUT of 13.8kv bus A on ground overcurrent.

DC Bus 1 is being supplied by it’s associated Battery Banks.
Current load is approximately 300 amps. At the current rate, the batteries will be discharged in 3.5 hours. If load on DC Bus 1 is reduced by HALF of the current load, how long will it take for the associated batteries to discharge?

A. 3.5 Hours

B. 10.5 hours

C. More than 7 hours

D. More than 3.5 hours but less than 7 hours

Which ONE of the following combinations represents NORMAL Standby electrical line up of swing charger DBC-2PN?
1. NORMAL status is determined by the Shift Manager.
2. BOTH DC OUTPUT disconnects open.
3. AC INPUT ON/OFF switch is in the “ON” position.
4. DC TRANSFER switch is in the “0” position.
5. DC TRANSFER switch in EITHER “1” or “2” position.
6. DC OUTPUT disconnect aligned the same as the transfer switch position.
7. AC INPUT ON/OFF switch is in the “OFF” position.

A. 1, 3, 6

B. 2, 3, 4

C. 2, 3, 7

D. 3, 4, 6

Upon transfer of Battery 1N to DBC1PN, which one of the following positions will the output transfer switch be in?

A. Position 1

B. Position 2

C. Position 3

D. Position 4

A. Battery 1P amps

B. Battery 2N amps

C. Charger DBC 1P amps

D. Charger DBC2N amps

Battery Charger DBC 1PN is aligned in the STANDBY lineup.
The AC input breaker will be ________.
The output transfer switch will be ________.
The DC output breakers will be ________.

A. Closed; Off (0); Open.

B. Open; Off (0); Closed.

C. Closed; On (1 or 2); Open.

D. Open; On (1 or 2); Closed.

A lockout of D1 bus has occurred. Which ONE of the following indications would be expected on Control Room indicators in this situation? (NO operator actions have been taken.)

A. II6284, Charger DBC2N amps, indicates HIGHER than normal.

B. II6290, Battery 2N amps, indicates HIGHER than normal.

C. II6289, Battery 1P amps, indicates HIGHER than normal.

D. II6283, Charger DBC1P amps, indicates HIGHER than normal.

The plant is operating at 100% power with all systems in a normal lineup. Which one of the following conditions will result in HIGHER than normal DISCH amperage being seen on BUS 1N amps?

A. Lockout of 4160 VAC Bus D1 on ground overcurrent.

B. AC input breaker OPEN for regulated rectifier YRF3.

C. AC input breaker OPEN for Charger 1P.

D. Lockout of 13.8KV Bus A on ground overcurrent.

Station DC is prevented from normally supplying essential Instrument AC busses by means of __________.

A. relays which will be actuated on LOW 120 VAC bus voltage.

B. reverse biased coupling diodes between the DC and AC sources.

C. a normally open disconnect between the DC and AC sources.

D. a filtration multivibrator type blocking circuit on the output of the rectifier.

Which ONE of the following describes the status of the RCPs?

A. RCP breakers HB03 and HB01 have opened due to the under voltage condition that is present.

B. RCP breakers HB03 and HB01 did NOT open due to loss of 13.8kV B bus control power.

C. The FLUX-DELTA FLUX-FLOW trip is operable for all four RPS channels.

D. The FLUX TO NUMBER OF RCPs ON trip is operable for all four RPS channels

480 VAC MCC F12A has been isolated due to ground fault conditions. Which ONE of the following indications would be expected on CTRM indicators in this situation? (NO operator actions have been taken.)

A. II6283, Charger DBC1P amps, indicates higher than normal.

B. II6289, Battery 1P amps, indicates higher than normal.

C. II6290, Battery 2N amps, indicates higher than normal.

D. II6284, Charger DBC2N amps, indicates higher than normal.

The following plant conditions exist:
* The plant is operating at 100% power.
* D1 Bus lockout has occurred.
Which one of the following sets of listed Instrument AC buses will cause the discharge of DCMCC2 batteries?
1. Y2/Y2A
2. Y4
3. YF1
4. YF2
5. YBU
6. YBR

A. 1, 2, 5

B. 1, 3, 6

C. 2, 4, 6

D. 3, 4, 5

The following plant conditions exist:
* A loss of offsite power has occurred.
* A lockout on 4160V Bus C1 has occurred.
* All other plant responses are normal.
Which ONE of the following describes the DC Electrical System configuration and the appropriate corrective action?

A. * Y1 and Y3 have automatically transferred to transformer XY1
* EDG 1 should be emergency shutdown

B. * Batteries on DC MCC1 are supplying Y1 and Y3
* YAU should be manually transferred to YAR

C. * Batteries on DC MCC1 are supplying Y1, Y3 and YAU
* EDG 1 should be emergency shutdown

D. * Y1 and Y3 have automatically transferred to transformer XY1
* YAU should be manually transferred to YAR

Answer Explanation:
DB-OP-02521, step 4.2.4.a says to do Att. 5, but with YAR alternate source dead, you do not
transfer YAR. Therefore, no actions on Att.5, do 4.2.4.b (not given in problem), do 4.3.4.c
perform actions for att 8.

What action is necessary to maximize the availability of DC equipment?

A. Cross connect E1 and F1 buses and place the Train 2 battery chargers in service.

B. Load shed both trains of DC equipment within 30 minutes of the loss of AC power.

C. Train 2 loads should be placed on their alternate supply from the Train 1 buses.

D. YBU cannot be transferred to alternate due to the loss of AC power.

The following plant conditions exist:
* The plant is operating at 100% power.
* C1 Bus lockout has occurred.
Which one of the following sets of listed Instrument AC buses will cause the discharge of DCMCC1 batteries?
1. Y1
2. Y3
3. Y4
4. YBU
5. YAU
6. YAR

A. 1, 3, 6

B. 1, 2, 5

C. 2, 4, 6

D. 3, 4, 5

Which ONE of the following describes the DC system status?

A. The 1P, 2P, 1N, 2N Batteries are being depleted, neither EDG is supplying Battery chargers.

B. The 1P and 2P Batteries are being depleted, 1N and 2N are being charged by the EDG.

C. The 2P and 2N Batteries are being depleted, 1P and 1N are being charged by the EDG.

D. The 1P, 2P, 1N, 2N Batteries are being charged by the EDGs.

While transferring Bus D1 control power from normal to alternate, which ONE of the following sets of responses would be expected?
1. All indicating lights for D1 loads will go out during the transfer
2. No D1 breakers can be remotely closed during the transfer
3. No D1 breakers can be remotely opened during the transfer
4. BUS D1 VOLTAGE Annunciator will be lit

A. 1, 2, and 3

B. 1, 2, and 4

C. 1, 3, and 4

D. 2, 3, and 4

Battery charger 1N was removed from service due to the balance
potentiometers not being sealed. Which ONE of the following is correct concerning this situation?

A. Battery charger DBC1P can be cross-connected to supply
-125 VDC battery Bus 1N.

B. Battery charger DBC1PN can be cross-connected to supply -125 VDC battery Bus 1N.

C. Battery 1N will supply the -125 VDC battery Bus 1N loads while being charged by battery charger DBC1P.

D. -125 VDC loads on essential Bus D1N supplied by -125 VDC battery Bus 1N will automatically sequence back on the bus when battery charger 1N is returned to the
bus.

The Electrical Foreman calls the Shift Manager to report that the weekly checks of train B battery revealed that the pilot cell float voltage of battery 2N is 2.09 volts. What action is required for this condition?

A. Within 24 hours verify all interconnected cells float voltages > 2.07 volts.

B. Within 24 hours verify all interconnected cells float voltages > 2.13 volts.

C. Within 6 days verify all interconnected cells float voltages > 2.07 volts.

D. Within 2 hours restore pilot cell float voltage to > 2.13 volts.

Which ONE of the following combinations identifies the NON-ESSENTIAL panels of the station DC system?

A. DAN, D2N, DBN, D1P

B. DAP, D1N, DBP, D2P

C. DAN, DBP, DBN, DAP

D. D2N, D1P, D2P, D1N

Which ONE of the following combinations correctly identifies the NORMAL power path from a station battery charger to a load off nonessential DC panel DBN?

A. Battery charger 2P to Bus 2PN to Bus 2N to Panel D2N to Panel DBN.

B. Battery charger 2N to Bus 2PN to Bus 2P to Panel D2P to Panel DBN.

C. Battery charger 2P to Bus 2P to Panel D2P to Panel DBN.

D. Battery charger 2N to Bus 2N to Panel D2N to Panel DBN.

Which one of the following combinations identifies the essential panels of the Station DC system?

A. DAN, D2N, DBN, D1P

B. DAP, D1N, DBP, D2N

C. DAN, DBN, DAP, DBP

D. D2N, D1P, D2P, D1N

Why is a full face shield considered the best protection while working on batteries?

A. To protect from flying chips

B. To protect for arc burns

C. To protect from splashed acid

D. To protect from dust

Per the FENOC INDUSTRIAL SAFETY MANUAL what is the minimum clothing requirements when working on batteries?

A. Safety shoes, long sleeved shirts, safety glasses and full face shield.

B. Safety glasses, acid resistant gloves, steel toe safety shoes and a full body apron.

C. Chemical goggles, full face shield, acid resistant gloves and full body apron.

D. Safety glasses, hard hat, rubber gloves and full body apron.

The normal alignment of SCI-UPS system is?

A. 120 VAC converted to 125 VDC then converted to 120 VAC

B. 480 VAC transformed to 208 VAC with an Inverter powered from a battery as standby.

C. 4160 VAC transformed to 208 VAC with an Inverter powered from a battery as standby.

D. 480 VAC Battery Charger to 125 VDC then Inverted to 208 VAC.

The purpose of the SCI-UPS system is to supply uninterruptible power to:

A. The Security Distribution panels

B. The Computer Servers in the DBAB

C. Environmental Monitors at the Beach Station

D. Alternate Power to 120 VAC distribution panels YAR and YBR

If the SCI-UPS system is being removed from service what is going to lose power?

A. The Security Distribution panels

B. The Computer Servers in the DBAB

C. Environmental Monitors at the Beach Station

D. Alternate Power to 120 VAC distribution panels YAR and YBR

Which of the following loads shall be powered from an alternate source prior to removing the SCI-UPS system from service?
1. Motorola Repeaters in the Personal Processing Facility 2nd floor
2. The SPDS Computers in the Control Room
3. The FDS/RMS Console in the Control Room
4. Outdoor Lighting from BY3

A. 1 and 2

B. 1 and 3

C. 2 and 4

D. 3 and 4

The SCI-UPS Inverter is removed from service and the Equipment Operator reports the 8 Cooling Fans on top of the Regulated Transformer XYVSA and Inverter XYSA are NOT running.
What actions are required with the fans NOT running, with the Regulated Transformer in service, AND the Inverter removed from service?

A. This is normal and the Cooling fans are NOT required.

B. The Regulated Transformer must be removed from service.

C. Place the Inverter back in service at the earliest possible time.

D. The power supply to the Cooling Fans has tripped and should be reset.

The Zone 1 Operator reports the Battery Charger, DBC-SPN, Voltage is 141 VDC. This indication may be caused by:

A. The Battery Charger has a Positive Ground Light ON

B. DC Output Breaker CB 302 is OPEN

C. The Equalize/Float Switch is in EQUALIZE

D. The AC Input Breaker is open and the Battery Charger Voltmeter indicates BATTERY VOLTAGE

The Zone 1 Operator reports the SCI-UPS Battery Charger, DBC-SPN, Voltage is 141 VDC. This indication is due to _____.

A. the Equalize/Float Switch being in EQUALIZE

B. DC Output Breaker CB 302 being OPEN

C. AC Input Breaker CB 301 being open

D. normal operating conditions

The output of the SCI-UPS Inverter YVSA is what?

A. 120 VAC

B. 140 VAC

C. 220 VAC

D. 240 VAC

The SCI-UPS Regulated Transformer XYVSA has just been removed from service. The SCI-UPS Inverter, YVSA remained in service, with XYVSA out of service. Which of the following is ABNORMAL on the SCI-UPS Inverter?

A. The IN SYNC Light ON.

B. The PRE-CHARGE INDICATOR light ON.

C. The ALTERNATE SOURCE SUPPLYING LOAD light OUT.

D. The 8 Cooling fans on top of the SCI-UPS Inverter and Regulated Transformer ON.

The following plant conditions exist:
- Loss of offsite power has occurred 5 minutes ago
- All systems function as designed
What is the source of power for the 208/120 VAC Distribution Panel YS1?

A. The SCI-UPS Battery Charger from the Misc. Diesel Generator

B. The SCI-UPS Battery

C. Alternate Power from Emergency Diesel Generator #1

D. The SCI-UPS regulated transformer

The SCI-UPS System is operating on the Battery. What is the minimum DC voltage allowed to continue to operate the SCI-UPS
System.

A. 115 VDC

B. 110 VDC

C. 105 VDC

D. 100 VDC

The Electrical Shop has requested to perform the SCI-UPS Battery Capacity Test, DB-ME-04001. Which of the following components should be removed from service?
1. SCI-UPS Battery charger
2. The Regulated Transformer
3. The SCI-UPS Inverter
4. The Miscellaneous Diesel Generator

A. 1 and 2

B. 1 and 3

C. 2 and 3

D. 2 and 4

The following plant conditions exist:
o A sustained loss of all Off Site has occurred
o The Miscellaneous Diesel Generator is out of service for
maintenance. What is the Minimum DC Voltage that will avoid SCI-UPS inverter damage?

A. 121 VDC

B. 111 VDC

C. 109 VDC

D. 105 VDC

The purpose of the SCI-UPS regulated transformer, XYVSA is to ______.

A. provide a standby source of power to the SCI-UPS Loads in the event of an SCI-UPS Inverter failure.

B. provide the normal source of power to the SCI-UPS Loads.

C. automatically supply the SCI-UPS Loads when the SCI-UPS Battery Charger loses AC Input power.

D. be normally de-energized and must be started up to remove the SCI-UPS Inverter YVSA from service.

While transferring the SCI-UPS loads to the SCI-UPS Regulated Transformer XYVSA, the IN SYNC light is required to be ON.
Why is the IN SYNC light required to be ON?

A. Indicates the Regulated Transformer output and the Inverter output are in phase and will provide a smooth transfer.

B. Indicates all the interlocks between the Regulated Transformer and the Inverter are energized and will enable the Alternate Source to Load pushbutton.

C. Indicates the Manual Bypass switch is in the Alternate Source to Load Position and the Static switch is now enabled to transfer to the Alternate position.

D. Indicates the Regulated Transformer and the Inverter are out of phase and the transfer should NOT continue.

When the SCI-UPS Loads are transferred to alternate using ALTERNATE SOURCE TO LOAD pushbutton, the Regulated Transformer, XYVSA supplies the SCI-UPS Loads. With no other operator actions, what is the next expected response of the SCIUPS system?

A. In 30 seconds the SCI-UPS loads will transfer back to normal.

B. There will be no other system response.

C. In 30 seconds the SCI-UPS Inverter output breaker will automatically trip open.

D. The Battery Charger will automatically place the battery on Equalize Charge.

The following plant conditions exist:
o All Electrical Busses are on their normal source
o 13.8 kv Bus A lockout has occurred 5 minutes ago
o The Misc. Diesel Generator has failed to start
What is the source of power for the 208/120 VAC distribution panel?

A. The SCI-UPS Battery Charger

B. The SCI-UPS Regulated Transformer

C. The SCI-UPS Battery through the SCI-UPS Inverter

D. Power from F4 through the SCI-UPS Battery Charger

Which of the following components are required to be removed from service prior to lifting or landing SCI-UPS Battery Leads?
1. SCI-UPS Battery charger
2. The Regulated Transformer
3. The SCI-UPS Inverter
4. The Misc Diesel Generator

A. 1 and 2

B. 1 and 3

C. 2 and 3

D. 2 and 4

The SCI-UPS system is de-energized. The preferred source to re-energize the SCI-UPS 208/120 VAC busses is?

A. From the SCI-UPS Battery

B. From the SCI-UPS Battery Charger

C. From the SCI-UPS Inverter

D. From the Regulated Transformer XYVSA

During the transfer of E4 to alternate a problem is encountered after E4 is deenergized that will not allow E4 to be re-energized for 30 minutes. What is the source of power for the 208/120 VAC distribution panel?

A. The SCI-UPS Battery Charger

B. The SCI-UPS Regulated Transformer

C. The SCI-UPS Battery through the SCI-UPS Inverter

D. Power from F4 through the SCI-UPS Battery Charger

During operation of the SCI-UPS Battery Rack Room Ventilation system fresh air is supplied from where?

A. From the Turbine Building through the air conditioning unit

B. From the Personnel Shop Facility roof using a supply fan

C. From the SCI-UPS Battery Charge Room through a fire damper

D. A supply duct tapped off from the Personnel Shop Facility 3rd floor supply fan

During normal operation, the SCI-UPS Battery Charge Room Ventilation system fresh air is supplied from where?

A. The Personnel Shop Facility roof using a supply fan

B. A supply duct tapped off the PSF 3rd floor supply fan

C. Through a fire damper in the SCI-UPS Battery Rack Room wall

D. From the Turbine Building through a fire damper

With the Battery Rack Room Air Conditioning Unit out of service, the SCI-UPS Battery Rack Room Ventilation is required to be run 10 minutes every 5 days to:

A. Remove caustic gasses from the SCI-UPS Battery Room that would break down the insulation.

B. Replenish the oxygen that is depleted due to SCI-UPS Battery Charging.

C. Remove the hydrogen that has accumulated from the SCI-UPS Battery Charging.

D. Remove the noble gases that are given off by the brick walls.

The SCI-UPS Battery Charge Room and the SCI-UPS Battery Rack Room are cooled by what?

A. The Battery Charge Room has a supply and exhaust fan and the Battery Rack Room has an air conditioning unit and exhaust fan.

B. The Battery Charge Room has an air conditioning unit and exhaust fan and the Battery Rack Room has a supply and exhaust fan.

C. There is one air conditioning unit that serves both the Battery Charge Room and the Battery Rack Room and each room has its own ventilation fans.

D. The Battery Charge Room and the Battery Rack Room has its own air conditioning units and ventilation fans.

The SCI-UPS Battery Charge Ventilation Supply Fan has failed.
The Battery Charger Room Temperature is 105°F. What actions, if any, should be performed?

A. The Battery Charge Room temperature should be monitored every hour until it reaches 110°F, then the SCI-UPS System should be shutdown.

B. There is no action to be taken. The Battery Charge Room equipment is rated for 120°F.

C. Temporary Ventilation should be supplied to the Battery Charge Room to maintain temperature less than 104°F.

D. Open the Fire Dampers on the west wall of the Battery Charge Room to allow the Turbine Building air to cool the Battery Charge Room.

Which ONE of the following is NOT an automatic shutdown of the Miscellaneous Diesel Generator?

A. High crank case pressure

B. Low lube oil pressure

C. High coolant temperature

D. Overcrank

Which ONE of the following is NOT an automatic shutdown of the Miscellaneous Diesel Generator?

A. High crank case pressure ( 5 psig)

B. Unloaded in auto ( 5 minutes)

C. Overspeed (2070 RPM)

D. High coolant temperature (205 F.)

During a loss of offsite power the Miscellaneous Diesel Generator will start and supply electrical power to security systems via Motor Control Center:

A. E43

B. F71

C. E11C

D. E23A

The purpose of the Non-Radwaste Ventilation System is to maintain the _____________________ .

A. Low Voltage Switchgear room temperature below 104°F

B. Emergency Diesel Generator room temperature below 60°F

C. Auxiliary Feed Pump room temperature above 120°F

D. Component Cooling Water room temperature above 104°F

Under which ONE of the following conditions are the Safety Related Low Voltage Switchgear Room ventilation fans to be used?

A. Post-LOCA or when the Non-Radwaste Ventilation System fails.

B. Anytime the Low Voltage Switchgear Room temperature exceeds 75°F.

C. Normally the Low Voltage Switchgear Room Vent Fan is in service.

D. Anytime the Low Voltage Switchgear Room temperature drops below 84°F.

Which ONE of the following is NOT an area supplied by the Non-Radwaste area supply fan?

A. Electrical penetration rooms

B. High voltage switchgear room

C. Low voltage switchgear room

D. Switchgear maintenance room

Which ONE of the following describes the ventilation flowpath for the Circulating Water Pump House during the summer months?

A. Air IN through 3 roof mounted supply fans and OUT through 4 sets of wall mounted dampers.

B. Air IN from the Turbine Building train bay area and OUT through 4 sets of wall mounted dampers.

C. Air IN through 4 sets of wall mounted dampers and OUT through 3 roof mounted exhaust fans.

D. Air OUT through Turbine Building Roof Vents and IN through 4 roof mounted supply fans.

Which ONE of the following is NOT a possible discharge flowpath of the NonRadwaste area return fan?

A. directly to atmosphere

B. directly to the turbine building

C. directly to the non-radwaste area supply fan suction

D. directly to the station vent

What system/component provides ventilation for the Service Water pipe tunnel?

A. Pipe Tunnel Exhaust Fan

B. Non-Radwaste Ventilation System

C. Service Water Pump Room Vent Fans

D. Diesel Fire Pump Room Ventilation System

The preferred method of operation for the Low Voltage Switchgear Room Ventilation System is in the AUTOMATIC mode.
However, if you were directed to START or STOP the ventilation system MANUALLY, which ONE of the following statements would be true?

A. With the room temperature at 80°F and the fan NOT RUNNING, the ventilation fan would START when the START pushbutton was depressed and STOP when the pushbutton was released.

B. With the room temperature at 70°F and the fan RUNNING due to a previous AUTO start signal, the ventilation fan would STOP when the STOP pushbutton was depressed and RE-START when the pushbutton was released.

C. With the room temperature at 80°F and the fan NOT RUNNING, the ventilation fan will START when the START pushbutton is depressed and CONTINUE TO RUN when the
pushbutton is released.

D. With the room temperature at 70°F and the fan RUNNING due to a previous AUTO START signal, depressing the STOP pushbutton will have NO effect because an AUTO start signal removes the control switch from the circuit until an AUTO STOP signal is received.

Which ONE of the following is the indication that the filter media has run out on the Non-radwaste Area Supply fan.

A. RED MEDIA RUNOUT light on the LOCAL control panel.

B. WHITE MEDIA RUNOUT light in the Control Room.

C. BLUE MEDIA RUNOUT light on the LOCAL control panel.

D. RED MEDIA RUNOUT light in the Control Room.

Which ONE of the following describes the expected operator response to the Auxiliary Building Non-Radwaste supply fan, C15, FILTER MEDIA RUNOUT light being LIT on control panel C5601.

A. NO response as the filter reverses direction until high differential pressure is cleared.

B. Submit a Notification.

C. NO response because the fan stops when differential pressure limit is exceeded.

D. Monitor the system for high differential pressure.

Three signals (other than operation of the control switch) will automatically shutdown a Turbine Building Supply Fan.
Which of the following is one of those three.

A. Smoke Stat 2-4%

B. Recirculation duct temp 135°F

C. Discharge temperature 135°F

D. Discharge temp 35°F

Three (3) signals (other than operation of the control switch) will automatically shutdown a Turbine Building Supply Fan. Which of the following is one of those three?

A. Smoke Stat 2-4%

B. Return air temperature of 175°F

C. Discharge air flow LOW

D. Discharge freeze stat 35°F

Which ONE of the following describes interlocks provided for the Low Voltage Switchgear Room vent fans?

A. CYCLE automatically OFF at 90°F and ON at 70°F

B. Fans START automatically on Safety Features Actuation System Level 2.

C. CYCLE automatically only if Non-Radwste Ventilation is in service.

D. CYCLE automatically ON at 85°F to 95°F and OFF at 65°F to 75°F.

Which ONE of the following describes the operation of the battery room ventilation fans?

A. With the battery room temperature at 78°F the battery room discharge damper CLOSES and the ventilation fan STOPS.

B. With the battery room temperature at 65°F, the battery room discharge damper OPENS and the ventilation fan STARTS.

C. With the battery room temperature at 65°F the battery room recirc damper OPENS, the discharge air damper CLOSES and the fan STOPS.

D. With the battery room temperature at 78°F the battery room discharge damper OPENS and the ventilation fan STARTS.

Which ONE of the following describes the function of the Battery Room Ventilation System?

A. room temperature remains below 104°F thus effectively cooling the batteries and ensuring the operability of the batteries.

B. room temperature remains above 70°F thus ensuring the operability of the batteries.

C. buildup of hydrogen gas concentration is kept to minimum.

D. battery room is ventilated in case of a loss of ventilation in the low voltage switchgear room.

The following plant conditions exist:
* The plant is operating at 100% power.
* It is July with ambient air temperature at 75°F.
* The wind is from the East.
The following events occur:
* Annunciator 1-6-F, BATT RM VENT SYS TRBL, alarms.
* Computer point Q031, BATTERY RM EXH FAN, is in alarm.
* Zone 1 reports Battery Room 1 fan is off.
What action needs to be completed?

A. Open the battery room door

B. Crossconnect Battery Room Exhaust Ventilation Systems

C. Verify battery pilot cell temperature is above the limit

D. Verify the filter is clean

Which ONE of the following combinations identifies the NON-ESSENTIAL panels of the station DC system?
A. DAN, D2N, DBN, D1P
B. DAP, D1N, DBP, D2P
C. DAN, DBP, DBN, DAP
D. D2N, D1P, D2P, D1N

What is the battery cell called that is used to determine operability via temperature? What is that temperature?

Pilot Cell, >60F

At what temperature must a CR be initiated if reached in a Main Steam Line room?

> 120F

Aux Boiler room fan is turned off when the temperature is below _______ for greater than _______ hours

30F and 24 hours

Computer point will alarm if Turbine Deck reaches what temperature?

100F

Major loads of Y1A and Y2A are what?

PAM channels 1 and 2

Major loads of YAU and YBU are what?

NNI, ICS X and Y

What 480v Bus’s supply power to the Containment Spray Pumps 1 and 2?

E1 and F1

What 480v Bus’s supply power to the Control Rod Feeders 1 and 2?

E2 and F2

What is the power supply for the EIAC?

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AO Block 4 Flashcards

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