Lauren Neuburger
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SRO (Practice Exams) Nuclear Operations Test sobre Systems 2 - Electrical, creado por Lauren Neuburger el 09/10/2016.

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Lauren Neuburger
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Systems 2 - Electrical

Systems 2 - Electrical

Pregunta 1 de 87

1

If a short circuit appears on a power line with recloser protection...

Selecciona una de las siguientes respuestas posibles:

  • A. the recloser closes when the fault clears ONLY.

  • B. the recloser will NOT close on a faulted line.

  • C. the recloser closes after a time delay only.

  • D. the recloser closes after a time delay ONLY if the fault has
    cleared.

Explicación

Pregunta 2 de 87

1

An electrical problem has resulted in the unloading of transformer XST2 and opening of MOAS 8012 (disconnect for XST2).

Which of the following identifies ALL of the requirements which must be met to close MOAS 8012 in order to restore power to XST2?

Transformer XST2 must be unloaded, ...

Selecciona una de las siguientes respuestas posibles:

  • A. the East/West lockout relay must be reset, and high speed ground switch (GXST2) must be open.

  • B. the East/West lockout relay must be reset, and high speed ground switch (GXST2) must be closed.

  • C. XST2 lockout relay must be reset, and high speed ground switch (GXST2) must be closed.

  • D. XST2 lockout relay must be reset, and high speed ground switch (GXST2) must be open.

Explicación

Pregunta 3 de 87

1

The East bus of the 345 Kv switchyard has experienced a lockout relay (LOR) trip.

Which of the following breakers are expected to open due to the LOR?

Selecciona una de las siguientes respuestas posibles:

  • A. DeCordova breaker (8060), Parker breaker (8040)

  • B. Comanche breaker (8090), Parker breaker (8040)

  • C. Venus breaker (8050), DeCordova breaker (8060)

  • D. Comanche breaker (8090), Venus breaker (8050)

Explicación

Pregunta 4 de 87

1

Who is responsible for all high voltage switching orders (138 and 345 KV) at CPNPP?

Selecciona una de las siguientes respuestas posibles:

  • A. The Transmission Grid Controller and the Shift Manager.

  • B. The Transmission Grid Controller and the Shift Operations Manager.

  • C. Unit Supervisor and the Shift Manager.

  • D. Field Support Supervisor and the Shift Manager.

Explicación

Pregunta 5 de 87

1

Given the following conditions:
-Both units are operating at 100% RTP.
-The switchyard in a normal alignment.

Which of the following would describe the plant electrical system alignment should INCOMING 138 KV XFMR FDR BKR 7040 (East Bus Supply to XST1) trip open?

Selecciona una de las siguientes respuestas posibles:

  • A. U1 Safeguards - XST1
    U2 Safeguards - XST1
    U1 Non-Safeguards - 1ST
    U2 Non-Safeguards - 2ST

  • B. U1 Safeguards - XST2
    U2 Safeguards - XST1
    U1 Non-Safeguards - 1UT
    U2 Non-Safeguards - 2UT

  • C. A. U1 Safeguards - XST2
    U2 Safeguards - XST1
    U1 Non-Safeguards - 1ST
    U2 Non-Safeguards - 2UT

  • D. A. U1 Safeguards - XST1
    U2 Safeguards - XST1
    U1 Non-Safeguards - 1UT
    U2 Non-Safeguards - 2UT

Explicación

Pregunta 6 de 87

1

Unit 1 is operating at 100% RTP with the switchyard in a normal alignment.

Which of the following would describe the Unit 1 electrical system line up should INCOMING 345 KV XFMR FDR BKR 7980 (W6 - West Bus Supply to 1ST and XST2) open due to a low gas pressure trip?

Selecciona una de las siguientes respuestas posibles:

  • A. Unit #1 safeguards - XST1
    Unit #1 non-safeguards - 1UT

  • B. Unit #1 safeguards - XST1
    Unit #1 non-safeguards - 1ST

  • C. Unit #1 safeguards - XST2
    Unit #1 non-safeguards - 1UT

  • D. Unit #1 safeguards - XST1
    Unit #1 non-safeguards - 1ST

Explicación

Pregunta 7 de 87

1

Given the following conditions:
-The 138 KV DeCordova line is out of service.
-The 345 KV East Bus is also out of service, rendering the following 345KV
lines unavailable:
--Parker #1
--DeCordova
--Everman
Under these conditions, which of the following transmission line configurations\ satisfies the Technical Specifications requirement for two physically independent
circuits between the offsite transmission network and the onsite Class 1E Distribution System?

138 KV Stephenville and 345 KV ...

Selecciona una de las siguientes respuestas posibles:

  • A. Venus.

  • B. Parker #2.

  • C. Wolf Hollow.

  • D. Comanche Switch.

Explicación

Pregunta 8 de 87

1

Given the following conditions:
-Glen Rose Transmission (GRT) is planning to perform non-emergent, non-routine testing on one of the switchyard diesel generators.
-In order to perform the testing a vendor must enter the switchyard who is not
badged at Comanche Peak.

Which of the following describes the notification and switchyard entry requirements of STA-629, Switchyard Control and Transmission Grid Interface?

A minimum of 35 days in advance of the testing the GRT Manager must notify the CPNPP...

Selecciona una de las siguientes respuestas posibles:

  • A. Switchyard Coordinator.
    The GRT escort and the vendor shall brief the CPNPP Switchyard Coordinator who will then grant access to the switchyard.

  • B. Electrical Work Window Manager.
    The GRT escort and the vendor shall brief the CPNPP Switchyard Coordinator who will then grant access to the switchyard.

  • C. Switchyard Coordinator.
    The GRT escort and the vendor shall brief the CPNPP Shift Manager who will then grant access to the switchyard.

  • D. Electrical Work Window Manager.
    The GRT escort and the vendor shall brief the CPNPP Shift Manager who will then grant access to the switchyard.

Explicación

Pregunta 9 de 87

1

With the 138 KV DeCordova line out of service, which of the following transmission line configurations satisfies the Technical Specifications requirement for two physically independent circuits between the offsite transmission network and the onsite Class 1E Distribution System?

Selecciona una de las siguientes respuestas posibles:

  • A. 138 KV Stephenville and 345 KV Venus

  • B. 138 KV Stephenville and 345 KV Parker #2

  • C. 138 KV Stephenville and 345 KV Wolf Hollow

  • D. 138 KV Stephenville and 345 KV Comanche

Explicación

Pregunta 10 de 87

1

Given the following conditions:
-Unit 1 is operating at 35% power in a normal system alignment.
-Transformer 1UT experiences a Differential Current Relay actuation (87/1UT).
-All others systems function as designed and NO other failures occur.

Which of the following is the resultant electrical bus status for Unit 1?

The Non-Safeguards 6.9 kV Buses __________; the 6.9 kV Safeguards Buses are energized by __________.

Selecciona una de las siguientes respuestas posibles:

  • A. fast transfer to Transformer 1ST: Transformer XST1

  • B. slow transfer to Transformer 1ST: Transformer XST1

  • C. fast transfer to Transformer 1ST: Transformer XST2

  • D. slow transfer to Transformer 1ST: Transformer XST2

Explicación

Pregunta 11 de 87

1

Which of the following describes the ALTERNATE power supplies to the Unit 1 and Unit 2 Safeguards 6.9KV Buses?

Selecciona una de las siguientes respuestas posibles:

  • A. U1 - XST1; U2 - XST1

  • B. U1 - XST1; U2 - XST2

  • C. U1 - XST2; U2 - XST1

  • D. U1 - XST2; U2 - XST2

Explicación

Pregunta 12 de 87

1

Assuming Unit 2 is in a normal full-power electrical alignment, if the Main Generator trips from 100% power to the Unit 2 Non-Safeguards 6.9 KV Buses will...

Selecciona una de las siguientes respuestas posibles:

  • A. fast transfer to 2UT, Unit 2 Auxiliary Transformer.

  • B. fast transfer to 2ST, Unit 2 Station Service Transformer.

  • C. slow transfer to 2UT, Unit 2 Auxiliary Transformer.

  • D. slow transfer to 2ST, Unit 2 Station Service Transformer.

Explicación

Pregunta 13 de 87

1

Assume a loss of XST2 occurs and all automatic actions occur as designed.

Which of the following describes the condition of the Auxiliary Feedwater Pumps on Unit 1 following this event?

Selecciona una de las siguientes respuestas posibles:

  • A. MDAFWP 1-01 running, MDAFWP 1-02 stopped and TDAFWP running.

  • B. Both MDAFWPs stopped and TDAFWP running.

  • C. MDAFWP 1-01 running, MDAFWP 1-02 stopped, and TDAFWP stopped.

  • D. Both MDAFWPs running and TDAFWP running.

Explicación

Pregunta 14 de 87

1

Given the following conditions:
-Unit 1 is operating at 100%, with the 6.9 KV systems in the normal alignment.
-A fault occurs on the supply line from the switchyard to the Unit 1 safeguards buses.

Which of the following describes the expected alignment of power supplies to the 6.9KV buses for Unit 1?

Selecciona una de las siguientes respuestas posibles:

  • A. XST2 supplying the safeguards buses, 1UT supplying the non-safeguards buses

  • B. XST2 supplying the safeguards buses, 1ST supplying the non-safeguards buses

  • C. XST1 supplying the safeguards buses, 1ST supplying the non-safeguards buses

  • D. XST1 supplying the safeguards buses, 1UT supplying the non-safeguards buses

Explicación

Pregunta 15 de 87

1

During power operations, one of the Pressurizer PORVs begins leaking by. The Unit 1 Supervisor directs that the block valves be closed and power removed from both block valves temporarily.

Which of the following identifies the power supplies for the PRZR PORV BLOCK VLVs, 8000A and 8000B?

Selecciona una de las siguientes respuestas posibles:

  • A. DC DIST PNL 1ED1-1 : DC DIST PNL 1ED2-1

  • B. 118 VAC DIST PNL 1EC1 : 118 VAC DIST PNL 1EC2

  • C. 480 VAC MCC 1EB3-2 : 480 VAC MCC 1EB4-2

  • D. 480 VAC MCC 1EB2-1 : 480 VAC MCC 1EB1-2

Explicación

Pregunta 16 de 87

1

Which of the following identifies a Train A and a Train B 480 VAC power supply? (Train A; Train B)

Selecciona una de las siguientes respuestas posibles:

  • A. 1ED1-1; 1ED2-1

  • B. 1EB3-1; 1EB4-2

  • C. 1EC1; 1EC2

  • D. 1EB2; 1EB1

Explicación

Pregunta 17 de 87

1

Given the following conditions:
-Unit 2 is at 45% power.
-A Main Transformer sudden pressure relay actuates due to a fire.
-The Main Generator de-energizes due to an 86-1 lockout.

Which of the following describes the plant response?

Selecciona una de las siguientes respuestas posibles:

  • A. The Reactor and Main Turbine will trip. The Fire Protection Deluge Valves will automatically open.

  • B. The Main Turbine will trip. The Fire Protection Deluge Valves must be manually opened.

  • C. The Reactor and Main Turbine will trip. The Fire Protection Deluge Valves must be manually opened.

  • D. The Main Turbine will trip. The Fire Protection Deluge Valves will automatically open.

Explicación

Pregunta 18 de 87

1

Unit 1 Safeguards Buses are being supplied from the Preferred Offsite Electrical Source when a loss of XST2 occurs. All automatic actions occur as designed.

Which of the following describes the condition of Unit 1 following this event?

Selecciona una de las siguientes respuestas posibles:

  • A. 1EA1-1 & 1EA2-1 open, 1EA1-2 & 1EA2-2 closed, TDAFWP stopped, and both MDAFWPs running.

  • B. 1EA1-1 & 1EA2-1 open, 1EA1-2 & 1EA2-2 closed, TDAFWP running, and both MDAFWPs running.

  • C. 1EA1-1 & 1EA2-1 closed, 1EA1-2 & 1EA2-2 open, TDAFWP stopped, and both MDAFWPs running.

  • D. 1EA1-1 & 1EA2-1 closed, 1EA1-2 & 1EA2-2 open, TDAFWP running, and both MDAFWPs running.

Explicación

Pregunta 19 de 87

1

Which of the following describes the correct configuration of fast and slow transfer capability provided for the supplies to the 6.9 kv buses?

Selecciona una de las siguientes respuestas posibles:

  • A. non-safeguards have fast; safeguards have fast

  • B. non-safeguards have slow; safeguards have fast

  • C. non-safeguards have fast and slow; safeguards have slow

  • D. non-safeguards and safeguards have fast and slow

Explicación

Pregunta 20 de 87

1

The 6.9 Kv Non-Safeguards Buses will fast transfer to the alternate power supply provided the alternate supply voltage is greater than the setpoint value, the phase angle between the supply voltages is within _____ and less than _______ has elapsed.

Selecciona una de las siguientes respuestas posibles:

  • A. 40 degrees, 1.0 second

  • B. 40 degrees, 0.25 second

  • C. 25 degrees, 1.0 second

  • D. 25 degrees, 0.25 second

Explicación

Pregunta 21 de 87

1

Unit 2 is operating at 100% power with the electrical plant in a normal alignment.

Unit Auxiliary Transformer, 2UT has received a sudden pressure alarm.

Which of the following describes the expected response of 2UT and Startup Transformer 2ST?

Selecciona una de las siguientes respuestas posibles:

  • A. The 2ST supply breakers to the non-safeguards buses close and then the 2UT supply breakers to the non-safeguards buses open.

  • B. The 2UT supply breakers to the non-safeguards buses open and, if phase angles match within 40 degrees, the 2ST supply breakers to the non-safeguards buses close.

  • C. The 2ST supply breakers to the non-safeguards buses open and, if phase angles match within 40 degrees, the 2UT supply breakers to the non-safeguards buses close.

  • D. The 2UT supply breakers to the non-safeguards buses close and then the 2ST supply breakers to the non-safeguards buses open.

Explicación

Pregunta 22 de 87

1

While transferring power from 2UT to 2ST during a normal plant shutdown, the handswitch for 2ST supply breaker to the non-safeguards bus 2A1(Breaker 2A1-2) is taken to the CLOSE position.

The following indications are observed WITHOUT the transfer occurring.
-Red position indicating light for Bkr 2A1-1 (from 2UT) LIT.
-Green position indicating light for Bkr 2A1-2 (from 2ST) LIT.
-2A1 bus voltage is 6.9 KV.
-Synchroscope is at the 12 o'clock position.
-Synchroscope lights are dark.
- Zero running volts.

What of the following is the likely cause for the failure of the bus transfer?

Selecciona una de las siguientes respuestas posibles:

  • A. 2ST has NO power and thus the transfer is blocked.

  • B. The anti-parallel relay did NOT open 2UT supply breaker 2A1-1 to allow 2ST supply breaker 2A1-2 to close.

  • C. The synchronizing switch is in the OFF position.

  • D. The spring charging motor for 2UT supply breaker 2A1-1 is in the OFF position.

Explicación

Pregunta 23 de 87

1

Which of the following are the indications that a slow transfer of 6900 V Safeguards bus 1EA1 has occurred after a loss of Startup Transformer XST2?

Breaker 1EA1-2. 1EA1 Alternate Feeder is...

Selecciona una de las siguientes respuestas posibles:

  • A. closed, DG1 running unloaded, BOS loads only sequenced on.

  • B. closed, DG1 NOT running, BOS loads only sequenced on.

  • C. open, DG1 running loaded, BOS loads only sequenced on.

  • D. open, DG1 running loaded with the previously operating loads on the bus.

Explicación

Pregunta 24 de 87

1

The anti-parallel interlock with the class 1E 6.9 KV Electrical Distribution System prevents paralleling...

Selecciona una de las siguientes respuestas posibles:

  • A. the preferred and alternate power sources.

  • B. the Emergency Diesel Generator and either the preferred or alternate power sources.

  • C. the Emergency Diesel Generator and the preferred power source ONLY.

  • D. the Emergency Diesel Generator and the alternate power source ONLY.

Explicación

Pregunta 25 de 87

1

Which of the following conditions will result in the automatic closure of a Diesel Generator (DG) output breaker?

Selecciona una de las siguientes respuestas posibles:

  • A. NO LOR actuations on 1EA1, 1EA1-1 supplying the bus, and a normal start of the DG is initiated.

  • B. 86-1 LOR actuated on 1EA1, 1EA1-1 and 1EA1-2 are open, and the DG started automatically due to bus undervoltage.

  • C. 86-2 LOR actuated on 1EA1, 1EA1-1 and 1EA1-2 are open, and the DG started automatically due to a Safety Injection.

  • D. NO LOR actuation on 1EA1, XST2 deenergized, 1EA1-1 fails to open (remains closed), and the DG started automatically due to bus undervoltage.

Explicación

Pregunta 26 de 87

1

Which of the following describes the operation of a 480V switchgear breaker that has been opened locally following a loss of DC control power?

Selecciona una de las siguientes respuestas posibles:

  • A. Breaker can be closed remotely one time if the breaker is in the TEST position.

  • B. Breaker CANNOT be closed until the breaker is reset by removing and then replacing the fuse block.

  • C. Breaker can be closed one time locally using the switch on the cubicle door.

  • D. Breaker CANNOT be closed again until the closing springs are manually charged.

Explicación

Pregunta 27 de 87

1

Given the following conditions:
-Unit 2 is in a normal operating alignment at 100% power.
-An 86-1/2EA1 Lockout Relay actuation occurs on Safeguards Bus 2EA1.
-The Electrical Distribution System responds as expected.
-NO operator actions have been performed.

Which of the following identifies the status of Safeguards Bus 2EA1 power supplies?

Diesel Generator 2-01 is...

Selecciona una de las siguientes respuestas posibles:

  • A. stopped, Breaker 2EG1 is open, and Safeguards Bus 2EA1 is deenergized.

  • B. running, Breaker 2EG1 is closed, and Safeguards Bus 2EA1 is energized.

  • C. running, Breaker 2EA1-1 is open, and Safeguards Bus 2EA1 is deenergized.

  • D. stopped, Breaker 2EA1-2 is closed, and Safeguards Bus 2EA1 is energized.

Explicación

Pregunta 28 de 87

1

Given the following conditions:
-Unit 2 is in MODE 1.
-An XST 1 Transformer fault has just occurred.
-Component Cooling Water (CCW) Pump 2-01 was running.
-CCW Pump 2-02 is in standby.

If Safeguards Bus 2EA2 receives an 86-2 Lockout, which of the following identifies when CCW Pump 2-02 is started?

Selecciona una de las siguientes respuestas posibles:

  • A. After the 86-2 Lockout on Bus 2EA2 is reset, due to low pressure on Train A CCW.

  • B. When directed by procedure, the pump is manually started.

  • C. At the appropriate step on the Blackout Sequencer, the pump is started.

  • D. Immediately after Bus 2EA2 is reenergized, due to low pressure on Train A CCW.

Explicación

Pregunta 29 de 87

1

Given the following conditions with Unit 1 in MODE 1:
-An XST2 Transformer fault has just occurred.
-Train A Component Cooling Water Pump was running.
-Train B Component Cooling Water Pump was in Standby.

If Safeguards Bus 1EA1 receives an 86-2 Lockout, which of the following identifies when Train B Component Cooling Water (CCW) Pump will start?

Selecciona una de las siguientes respuestas posibles:

  • A. At the appropriate step in the Blackout Sequencer.

  • B. When the operator manually starts it.

  • C. After the 86-2 Lockout on Bus 1EA1 is reset, due to low pressure on Train A CCW.

  • D. Immediately after Bus 1EA2 is reenergized, due to low pressure on Train A CCW.

Explicación

Pregunta 30 de 87

1

Unit 2 Safeguard buses are in a normal alignment for MODE 1 operation. An 86-1/2EA1 lockout relay actuation occurs on 2EA1.

Assuming the electrical distribution system responds as expected, what is the final status of 2EA1 power supplies?

Selecciona una de las siguientes respuestas posibles:

  • A. DG 2-01 stopped, 2EG1 open and 2EA1 deenergized.

  • B. DG 2-01 running, 2EG1 open and 2EA1 deenergized.

  • C. DG 2-01 running, 2EG1 closed and 2EA1 energized.

  • D. DG 2-01 stopped, 2EA1-2 closed and 2EA1 energized.

Explicación

Pregunta 31 de 87

1

If an SI occurs while the Emergency Diesel Generator is paralleled with offsite power, the preferred class 1E supply breaker...

Selecciona una de las siguientes respuestas posibles:

  • A. will remain closed, the DG breaker will open and the DG will continue to run in standby.

  • B. will remain closed, the DG and output breaker will trip, the SI signal will then restart DG to run in standby.

  • C. will open the DG breaker will remain closed and continue to supply the class 1E bus.

  • D. and the DG breaker will open, all loads will strip from the bus, then the DG breaker will reclose.

Explicación

Pregunta 32 de 87

1

Which of the following describes a design feature of the Second Level Undervoltage Relays?

Selecciona una de las siguientes respuestas posibles:

  • A. Starts the Emergency Diesel Generators and initiates a Blackout Sequencer.

  • B. Provides transfer to an energized Offsite Power source upon a loss of bus voltage.

  • C. Protects the 1E motors from a low voltage/high current condition by opening the Preferred and Alternate Feeder Breakers.

  • D. Ensures the opening of the Alternate Feeder Breaker within one second after the Preferred Feeder Breaker closes.

Explicación

Pregunta 33 de 87

1

With Unit 1 in MODE 1, a fault on transformer 1ST causes a 1ST lockout relay to trip.

6.9 KV Safeguards Busses 1EA1 and 1EA2 are expected to be energized by...

Selecciona una de las siguientes respuestas posibles:

  • A. XST1 and NO Blackout Sequencer actuation will occur.

  • B. XST2 and the Blackout Sequencer will be sequencing loads.

  • C. XST1 and the Blackout Sequencer will be sequencing loads.

  • D. XST2 and NO Blackout Sequencer actuation will occur.

Explicación

Pregunta 34 de 87

1

Given the following conditions:
-Unit 2 Safeguard buses are in a normal alignment for MODE 1 operation.
-An 86-2/2EA1 lockout relay actuation occurs on 6.9 KV Safeguards Bus 2EA1.
-NO operator actions are taken.

What is the final expected status of 2EA1 power supplies, Emergency Diesel Generator 2-01 (DG 2-01), and the Emergency Diesel Generator Output Breaker 2EG1?

Selecciona una de las siguientes respuestas posibles:

  • A. DG 2-01 stopped, Alternate Feeder Breaker 2EA1-2 closed, and 2EA1 energized.

  • B. DG 2-01 running, 2EG1 open, and 2EA1 deenergized.

  • C. DG 2-01 running, 2EG1 closed, and 2EA1 energized.

  • D. DG 2-01 stopped, 2EG1 open, and 2EA1 deenergized.

Explicación

Pregunta 35 de 87

1

Given the following conditions:
-Unit 2 is in a normal operating alignment at 100% power.
-An 86-2/2EA1 Lockout Relay actuation occurs on Safeguards Bus 2EA1.
-The Electrical Distribution System responds as expected.
-NO operator actions have been performed.

Which of the following identifies the final status of Safeguards Bus 2EA1 power supplies?

Diesel Generator 2-01 is...

Selecciona una de las siguientes respuestas posibles:

  • A. stopped, Breaker 2EG1 is open, and Safeguards Bus 2EA1 is deenergized.

  • B. running, Breaker 2EG1 is closed, and Safeguards Bus 2EA1 is energized.

  • C. running, Breaker 2EA1-1 is open, and Safeguards Bus 2EA1 is deenergized.

  • D. stopped, Breaker 2EA1-1 is closed, and Safeguards Bus 2EA1 is energized.

Explicación

Pregunta 36 de 87

1

The response of the class 1E 6.9 KV Electrical Distribution System if an SI occurs while the Emergency Diesel Generator is paralleled with the bus is the preferred class 1E supply breaker will...

Selecciona una de las siguientes respuestas posibles:

  • A. open and the DG breaker will remain closed and continue to supply the class 1E bus.

  • B. remain closed, the DG output breaker will trip, and the SI signal will then restart the DG to run in standby.

  • C. remain closed, the DG breaker will open, and the DG will continue to run in standby.

  • D. open and the DG breaker will open, all loads will strip from the bus, then the DG breaker will reclose.

Explicación

Pregunta 37 de 87

1

Given the following conditions:
-Unit 1 is in a normal MODE 1 alignment at 70% power.
-Excessive loading on the 345 KV Grid caused 6.9 KV Bus voltages to slowly
degrade to approximately 5800 volts.

Assuming 138 KV Grid voltage is normal and systems function as designed, what automatic actions are expected to occur?

Safeguards Buses 1EA1 and 1EA2...

Selecciona una de las siguientes respuestas posibles:

  • A. transfer to the Diesel Generator, Blackout Sequencer reloads Blackout loads on 1EA1 and 1EA2, Non-Safeguards Buses 1A1 through 1A4 transfer to the Alternate Source.

  • B. transfer to the Diesel Generator, Blackout Sequencer reloads
    Blackout loads on 1EA1 and 1EA2, Non-Safeguards Buses 1A1 through 1A4 do not transfer to the Alternate Source.

  • C. slow transfer to the Alternate Source, Blackout Sequencer reloads
    Blackout loads on 1EA1 and 1EA2, Diesel Generators remain stopped, Non-Safeguards Buses 1A1 through 1A4 are not affected.

  • D. slow transfer to the Alternate Source, Blackout Sequencer reloads
    Blackout loads on 1EA1 and 1EA2, Diesel Generators start and remain unloaded, Non-Safeguards Buses 1A1 through 1A4 are not affected.

Explicación

Pregunta 38 de 87

1

The Safeguards Electrical System second level undervoltage trip provides...

Selecciona una de las siguientes respuestas posibles:

  • A. transformer protection against overcurrent.

  • B. protection against out-of-phase paralleling of 6.9 KV power sources.

  • C. low voltage/high current protection of 1E motors.

  • D. protection against effects of reverse power condition on 6.9 KV bus components.

Explicación

Pregunta 39 de 87

1

Given the following conditions:
-Unit 1 Train A Diesel Generator is paralleled to 1EA1 for an operability run after being returned to service following a repair of the governor control system.
-After the Diesel is paralleled to the bus with Incoming Breaker 1EA1-1 closed, a Safety Injection occurs.
-All systems function as designed.

What is the status of 1EA1 and Train A Diesel Generator?

Incoming Breaker 1EA1-1...

Selecciona una de las siguientes respuestas posibles:

  • A. and Incoming Breaker 1EA1-2 both open and 1EA1 is energized via Train A Diesel Generator.

  • B. will remain closed, Train A Diesel Generator will trip, and the SI signal will then restart Train A Diesel Generator to run in standby.

  • C. will remain closed, Train A Diesel Generator breaker will open, and the DG will continue to run in standby.

  • D. and Train A Diesel Generator breaker will open, all loads will strip from the bus, then the DG breaker will reclose.

Explicación

Pregunta 40 de 87

1

Given the following conditions:
-Unit 2 is at full power.
-Unit 1 is shutdown and preparing to energize the Unit 1 Main Transformers via the backfeed configuration.

Which of the following identifies the reason for notifying Unit 2 personnel prior to backfeeding the Unit 1 Main Transformers?

Unit 2...

Selecciona una de las siguientes respuestas posibles:

  • A. Main Generator ground relays may "drop" due to the site grounding scheme.

  • B. GEN NEG SEQ CURRENT HI alarm may be received due to an inrush of current to the Unit 1 Transformers.

  • C. GEN OVRVOLT alarm may be received due to an out rush of current from the Unit 2 Transformers.

  • D. Main Transformer ground relays may "drop" due to the site grounding scheme.

Explicación

Pregunta 41 de 87

1

Given the following conditions:
-Comanche Peak has been notified by the QSE Generation Controller that conditions on the ERCOT grid are such that the Tech Spec upper and lower voltage limits for the 6.9 KV Safeguards buses could be exceeded.
-The Shift Manager has directed performance of OPT-215, Class 1E Electrical System Operability.

Which of the following lists the lower and upper voltage limits required for the Comanche Peak 6.9 KV Safeguards Buses to be considered OPERABLE in accordance with Technical Specification 3.8.9, Distribution Systems – Operating, Surveillance Requirement SR 3.8.9.1 and OPT-215? (Lower and Upper Limit)

Selecciona una de las siguientes respuestas posibles:

  • A. 6300 V, 7000 V

  • B. 6500 V, 7100 V

  • C. 6450 V, 7150 V

  • D. 6480 V, 7150 V

Explicación

Pregunta 42 de 87

1

Given the following conditions:
-A Loss of Offsite Power has occurred with Unit 2 in MODE 3.
-All offsite circuits have been declared INOPERABLE.
-Both Emergency Diesel Generators are powering their respective Safeguards Buses.
-No other equipment was previously out of service.

Per Tech Spec LCO 3.8.1, which of the following COMPLETION TIMES would apply to restore one required offsite circuit to OPERABLE status?

Restore one required offsite circuit to OPERABLE status within...

Selecciona una de las siguientes respuestas posibles:

  • A. 2 hours

  • B. 12 hours

  • C. 24 hours

  • D. 72 hours

Explicación

Pregunta 43 de 87

1

Which of the following flowpaths correctly describes how power is normally supplied to a typical Unit 2 vital instrument bus (e.g. 2EC1)?

Selecciona una de las siguientes respuestas posibles:

  • A. 480 VAC from safeguards bus, rectified to 125 VDC by a Battery Charger, DC Bus, inverted to 118 VAC, and supplied to instrument bus.

  • B. 480 VAC from safeguards bus, transformed to 118 VAC, and
    supplied to the instrument bus.

  • C. 480 VAC from safeguards bus, inverted to 118 VAC by battery
    charger, supplied to battery bus, and supplied to instrument bus.

  • D. 125 VDC from battery, stepped down to 118 VDC, and supplied to instrument bus.

Explicación

Pregunta 44 de 87

1

Which of the following flowpaths correctly describes how power is NORMALLY supplied to a typical Unit 1 vital instrument bus (e.g. 1EC1)?

Selecciona una de las siguientes respuestas posibles:

  • A. Safeguards 480 VAC -> Battery Charger -> 1E 125 VDC Bus -> Inverter -> Instrument Bus

  • B. Safeguards 480 VAC -> Battery Charger -> Transformer -> Inverter -> Instrument Bus

  • C. 1E 125 VDC Bus -> Battery Charger -> Inverter -> Instrument Bus

  • D. Safeguards 480 VAC -> Inverter -> Battery Charger -> Instrument Bus

Explicación

Pregunta 45 de 87

1

The normal power supplies for the Protection Inverter IV1PC1 through IV1PC4 are...

Selecciona una de las siguientes respuestas posibles:

  • A. class 1E 480 V buses.

  • B. class 1E 125 V DC buses.

  • C. non-class 1E 480 volt buses.

  • D. non-class 1E 125 V DC buses.

Explicación

Pregunta 46 de 87

1

With 118 VAC Inverter IV2EC2 supplying 118 VAC Vital Distribution Panel 2EC2 in a normal alignment, the following indications are noted:
-INVERTER SUPPLYING LOAD yellow light ON
-BYPASS SOURCE SUPPLYING LOAD red light OFF
-IN SYNC yellow light OFF

A fault occurs which causes the inverter DC input breaker to trip open.

Assuming NO operator action(s), which of the following describes the expected status of 118 VAC Vital Distribution Panel 2EC2?

Selecciona una de las siguientes respuestas posibles:

  • A. 2EC2 is being powered from Inverter IV2EC2

  • B. 2EC2 is being powered from bypass power

  • C. 2EC2 is being powered from the swing inverter

  • D. 2EC2 is de-energized

Explicación

Pregunta 47 de 87

1

Given the following condition:
-Inverter 1PC4 has been declared inoperable due to an internal failure.

Which of the following alignments would be acceptable to allow Unit 1 to continue to operate in MODE 1 for the next several weeks while parts are procured for repairs to Inverter 1PC4?

Align 118 VAC __________ to 118 VAC Vital Distribution Panel 1PC4.

Selecciona una de las siguientes respuestas posibles:

  • A. Distribution Panel 1EC6.

  • B. Distribution Panel 1EC5.

  • C. Inverter IV1EC2/4.

  • D. Inverter IV1EC1/3.

Explicación

Pregunta 48 de 87

1

Installed Spare Inverter IV1EC2/4 is properly aligned, supplying inverted power to Bus 1PC4, when a fault deenergizes DC Bus 1ED2.

The installed spare inverter will...

Selecciona una de las siguientes respuestas posibles:

  • A. continue to supply inverted power to Bus 1PC4.

  • B. lose output, deenergizing Bus 1PC4.

  • C. auto transfer to supply bus loads from Bus 1EC2.

  • D. auto transfer bus loads to Inverter IV1PC4.

Explicación

Pregunta 49 de 87

1

The Main Control Room normal lighting for each unit's horseshoe area is supplied power during normal plant operations from...

Selecciona una de las siguientes respuestas posibles:

  • A. a non-safeguards battery.

  • B. a safeguards battery.

  • C. a safeguards 480 V MCC via a lighting transformer.

  • D. an inverter which is supplied by a non-safeguards battery.

Explicación

Pregunta 50 de 87

1

Given the following conditions:
-The unit is at 100% power.
-Power has been lost to 1PC3, Protection Bus III, and actions are being taken
in accordance with ABN-603, Loss of Protection or Instrument Bus.
-PT-936, Containment Pressure Channel II, then fails high.

Which of the following describes the effect on the:
1) Safety Injection (SI) system; and,
2) Containment Spray (CS) system?

Selecciona una de las siguientes respuestas posibles:

  • A. 1) An SI would NOT occur.
    2) A CS actuation would NOT occur.

  • B. 1) An SI would occur.
    2) A CS actuation would NOT occur.

  • C. 1) An SI would NOT occur.
    2) A CS actuation would occur.

  • D. 1) An SI would occur.
    2) A CS actuation would occur.

Explicación

Pregunta 51 de 87

1

Given the following conditions:
-The Unit is in MODE 6.
-Core Alterations are in progress.
-The Gamma Metrics Monitoring System is tagged out for maintenance.
-1-ALB-10B, 1.16, 118V CHAN I INV TRBL alarm is locked in.
-1-LI-930, RWST level indicates zero (0) %.
-1-NI-31, Source Range instrument is indicating zero (0) cpm.
-1-PI-0405, RCS pressure indicates zero (0) psig.

In accordance with Technical Specifications, which of the following describes the
ACTION required?

Selecciona una de las siguientes respuestas posibles:

  • A. Immediately suspend Core Alterations and operations that would cause introduction of coolant into the RCS with boron concentration less than that required for refueling operations specified in the COLR.

  • B. Core Alterations and operations that would cause introduction of coolant into the RCS with boron concentration less than that required for refueling operations specified in the COLR may
    continue if the Source Range Audio Count Rate is selected to an OPERABLE channel.

  • C. Core Alterations may continue. Operations that would cause introduction of coolant into the RCS with boron concentration less than that required for refueling operations specified in the COLR are prohibited.

  • D. Immediately suspend Core Alterations. Ensure at least 1 Source Range NI is OPERABLE prior to performing operations that would cause introduction of coolant into the RCS with boron concentration less than that required for refueling operations specified in the COLR.

Explicación

Pregunta 52 de 87

1

Given the following conditions with Unit 1 operating at 100% power:
-A loss of 1EC1, Instrument Bus occurred due to a fault on the supply breaker
to IV1EC1, Inverter.
-1EC1, Instrument Bus is currently powered from the Alternate Source, 1EC3, Instrument Bus.

Which of the following:
Identifies the most restrictive Technical Specification Limiting Condition for Operation?
Describes the REQUIRED ACTION?

Selecciona una de las siguientes respuestas posibles:

  • A. The Instrument Bus Inverter is INOPERABLE.
    Restore Instrument Bus power to normal in 24 hours.

  • B. The Instrument Bus Inverter is INOPERABLE.
    Restore Instrument Bus power to normal within 72 hours.

  • C. Diesel Generator 1-01 and its Blackout Sequencer are INOPERABLE because of loss of IV1EC1, Inverter.
    Restore Diesel Generator 1-01 operability within 24 hours.

  • D. Diesel Generator 1-01 and its Blackout Sequencer are INOPERABLE because of loss of IV1EC1, Inverter.
    Restore Diesel Generator 1-01 operability within 72 hours.

Explicación

Pregunta 53 de 87

1

Given the following conditions:
-Unit 1 is at full power.
-A loss of Vital 120 VAC bus 1EC2 occurs.
-Troubleshooting is in progress bus the bus is unable to be re-energized.

How long before the Unit must be in MODE 3?

Selecciona una de las siguientes respuestas posibles:

  • A. 2 hours.

  • B. 6 hours.

  • C. 8 hours.

  • D. 30 hours.

Explicación

Pregunta 54 de 87

1

Given the following conditions at 100% power on Unit 1:
-Unit 1 transferred Instrument Bus 1EC2 to the Alternate Power Supply due to a problem with Inverter IV1EC2.
-No other equipment was previously out of service.

Which of the following Technical Specification actions would apply and provide the most limiting time before requiring entry into MODE 3?

Technical Specification Limiting Condition for Operation...

Selecciona una de las siguientes respuestas posibles:

  • A. 3.8.1, AC Sources - Operating, CONDITION B: One DG inoperable.

  • B. 3.8.1, AC Sources - Operating, CONDITION I: One Blackout Sequencer inoperable.

  • C. 3.8.7, Inverters - Operating, CONDITION A: One required inverter inoperable.

  • D. 3.8.9, Distribution Systems - Operating, CONDITION B: One AC vital bus subsystem inoperable.

Explicación

Pregunta 55 de 87

1

If instrument bus 1EC1 is lost while in MODE 6, all operations involving CORE ALTERATIONS, positive reactivity changes, or movement of irradiated fuel are suspended until...

Selecciona una de las siguientes respuestas posibles:

  • A. permission is obtained from Station Nuclear Engineering.

  • B. the redundant train is properly energized.

  • C. temporary monitoring instrumentation is installed.

  • D. the shutdown margin is verified adequate.

Explicación

Pregunta 56 de 87

1

Given the following conditions:
-Power is currently at 32% during a plant startup.
-Protection Bus 1PC4 deenergized as a result of a fault.
-Protection Bus 1PC4 will be deenergized for approximately four (4) hours while repairs are being made.

In order to put the plant in a safe condition ...

Selecciona una de las siguientes respuestas posibles:

  • A. place all 7300 Process Protection Cabinet IV Reactor Trip instruments in the tripped condition in accordance with the individual instrument ABNs.

  • B. place all 7300 Process Protection Cabinet IV Engineered Safeguards Function instruments in the tripped condition in accordance with the individual instrument ABNs

  • C. place all Main Feedwater Control Valves in MANUAL in accordance with ABN-603, Loss of Protection or Instrument Bus.

  • D. initiate a plant shutdown in accordance with IPO-003A, Power
    Operations.

Explicación

Pregunta 57 de 87

1

A continuous float charge is maintained on the DC system batteries to...

Selecciona una de las siguientes respuestas posibles:

  • A. prevent electrolyte evaporation.

  • B. minimize the effects of electrical grounds.

  • C. maintain battery at the required capacity condition.

  • D. equalize the voltage of each cell of the battery.

Explicación

Pregunta 58 de 87

1

Following a loss of all AC power, how long are the safety-related 125 VDC batteries DESIGNED to allow equipment operation?

Selecciona una de las siguientes respuestas posibles:

  • A. 2 hours, assuming that all non-essential loads are shed from the associated DC bus

  • B. 2 hours, assuming all loads remain aligned to the associated DC bus

  • C. 4 hours, assuming that all non-essential loads are shed from the associated DC bus

  • D. 4 hours, assuming all loads remain aligned to the associated DC bus

Explicación

Pregunta 59 de 87

1

Given the following conditions:
-Unit 1 is at 100% power with all systems in their normal alignment.
-ALB-10B, 1.13, 125 VDC SWITCH PNL 1ED1 TRBL, is alarming.
-V-1ED1, 125 VDC SWITCH PNL 1ED1 VOLT, is indicating 135 volts.
-When the GROUND TEST switch at Panel 1ED1 is placed in "TEST", both
the NEGATIVE-GND and POSITIVE-GND white lights are lit.
-The POSITIVE-GND white light is brighter and the NEGATIVE-GND white
light is dimmer.

Which of the following is the cause of the trouble alarm on 125 VDC Panel 1ED1, and the component supplying power to Panel 1ED1?

Selecciona una de las siguientes respuestas posibles:

  • A. A POSITIVE ground exists and the BATTERY is supplying the
    bus.

  • B. A POSITIVE ground exists and the BATTERY CHARGER is supplying the bus.

  • C. A NEGATIVE ground exists and the BATTERY is supplying the bus.

  • D. A NEGATIVE ground exists and the BATTERY CHARGER is supplying the bus.

Explicación

Pregunta 60 de 87

1

Unit 1 just completed a major outage on bus 1D1, its associated batteries, and battery chargers. The associated bus, batteries, and battery chargers are ready to be returned to service and support plant start-up.

Which of the following could delay the batteries' return to full voltage?

Selecciona una de las siguientes respuestas posibles:

  • A. The input current limiters in the chargers are set conservatively too low.

  • B. Turbine seal oil pumps draw a large amount of current from 1D1

  • C. The output current limiters in the chargers are set conservatively too low.

  • D. Battery room ambient temperature has reached 72°F.

Explicación

Pregunta 61 de 87

1

250 VDC Bus 1D2 is being powered by Batteries BT1D2 and BT1D4 while supplying the following loads:
-SG Feed Pu,mp Emergency Oil Pumps 1-01 and 1-02 (30 Amps each)
-Main Turbine Emergency Oil Pump (60 Amps)
-DC Seal Oil Pump (30 Amps)

Assuming that these are the only loads on the DC bus, how long will the battery system last if the combined rating of the batteries is 1200 ampere-hours?

Selecciona una de las siguientes respuestas posibles:

  • A. 6 hours

  • B. 8 hours

  • C. 10 hours

  • D. 12 hours

Explicación

Pregunta 62 de 87

1

Given the following conditions on Unit 1:
-The Unit is operating at 100% power.
-No Safety related equipment is out of service.
-480 VAC 1E Bus 1EB1 has been lost due to an electrical fault.

Which of the following describes the status of the Train A Batteries?

Selecciona una de las siguientes respuestas posibles:

  • A. One of the two Battery Chargers connected to each of the Battery Buses 1ED1 and 1ED3 were lost. Batteries BT1ED1 and BT1ED3 remain on Float Charge.

  • B. Two Chargers were lost to DC Bus 1ED1. Battery BT1ED1 is discharging and Battery BT1ED3 remains on Float Charge.

  • C. One of two Battery Chargers available to Battery Buses 1ED1 and 1ED3 were lost but the standby Battery Charger breaker automatically closed. Batteries BT1ED1 and BT1ED3 remain on Float Charge.

  • D. One of two Battery Chargers available to each of the Battery Buses 1ED1 and 1ED3 were lost. If the Battery Chargers were in service then the associated battery will be discharging.

Explicación

Pregunta 63 de 87

1

Given the following conditions:
-ALB-10B, 1.13, 125V SWITCH PNL 1ED1 TRBL, is alarming.
-All other alarms are clear.
-A-BT1ED, BATT BT1ED1 CURRENT, is indicating (–) 10 amps.
-V-1ED1, 125 VDC SWITCH PNL 1ED1 VOLT, is indicating 130 volts.
-A Nuclear Equipment Operator (NEO) reports that 125 VDC BATTERY CHARGER BC1ED1-1 is aligned in the “Float” mode with a DC VOLTS indication of 134 volts.
-The NEO also reports that when the GROUND TEST switch at Panel 1ED1 is placed in “Test”, both the NEGATIVE-GND and POSITIVE-GND white lights are lit, with the NEGATIVE-GND white light slightly brighter than the POSITIVE-GND white light.

Which of the following is the cause of the trouble alarm on 125 VDC Panel 1ED1?

Selecciona una de las siguientes respuestas posibles:

  • A. An undervoltage condition on the panel

  • B. An overvoltage condition from the battery charger

  • C. A ground condition on the negative terminal of the panel

  • D. A ground condition on the positive terminal of the panel

Explicación

Pregunta 64 de 87

1

Which of the following identifies the types of trips or protective isolation circuits associated with the DC Distribution Panels?

Selecciona una de las siguientes respuestas posibles:

  • A. Overcurrent only.

  • B. Ground fault only.

  • C. Overcurrent and undervoltage only.

  • D. Overvoltage, ground fault, and undervoltage.

Explicación

Pregunta 65 de 87

1

A ground condition on a safety-related DC bus would be indicated by...

Selecciona una de las siguientes respuestas posibles:

  • A. placing the ground test switch in TEST and cycling through all the loads until the amp meter indicates NO pulses.

  • B. the ground detection lights cycling on and off at different frequencies.

  • C. the negative and positive white lights both illuminating with the same intensity.

  • D. either the positive or negative light being dimmer than the other with the ground test switch in TEST.

Explicación

Pregunta 66 de 87

1

The operation of battery chargers BC1ED1-1 and BC1ED1-2 in parallel is prevented by...

Selecciona una de las siguientes respuestas posibles:

  • A. an electrical interlock that opens the offgoing charger output breaker when the oncoming charger output breaker is closed.

  • B. a mechanical interlock consisting of a sliding bar between the circuit breakers connecting the battery chargers to the DC bus.

  • C. the physical arrangement of the DC Distribution System preventing connecting these chargers to the same bus.

  • D. an electrical interlock that opens the offgoing charger input breaker when the oncoming charger input breaker is closed.

Explicación

Pregunta 67 de 87

1

Which of the following identifies how the 125/250 VDC Common Non-Safeguards DC Distribution Panels are prevented from being supplied by both Units during transfer operations?

Selecciona una de las siguientes respuestas posibles:

  • A. Closing the incoming feeder breaker sends a trip signal to the off going feeder breaker.

  • B. A selector switch only allows the selection of one feeder breaker at a time.

  • C. A mechanical slide bar prevents closing both feeder breakers at the same time.

  • D. Electrical contacts prevent closing both feeder breakers simultaneously.

Explicación

Pregunta 68 de 87

1

Given the following conditions:
-Unit 1 is operating at 100%.
-Battery 1ED1 is in EQUALIZE on 125 VDC BATTERY CHARGER BC1ED1-1.
-Battery Room Exhaust Fan 7 is running with Battery Room Exhaust Fan 8 in standby.
-Annunciator 1-ALB-11B, Window 4.2 – ANY BATT RM EXH FN TRIP goes into alarm.
-The Reactor Operator reports that Battery Room Exhaust Fan 7 is tripped and Battery Room Exhaust Fan 8 did not AUTO start and will not manually start.

Which of the following describes the impact on the Battery Room due to no exhaust fan running? The battery should be placed in what condition?

An exhaust fan running is required...

Selecciona una de las siguientes respuestas posibles:

  • A. by Technical Specifications to maintain battery room temperature.
    The battery should be placed in FLOAT.

  • B. to minimize the buildup of hydrogen gas in the battery rooms.
    The battery should be placed in FLOAT.

  • C. to minimize the buildup of hydrogen gas in the battery rooms.
    The battery may remain in EQUALIZE.

  • D. by Technical Specifications to maintain battery room temperature.
    The battery may remain in EQUALIZE.

Explicación

Pregunta 69 de 87

1

Given the following conditions:
-Unit 2 is at 100% power.
-Annunciator 2-ALB-10B, Window 1.13 - 125VDC SWITCH PNL 2ED1 TRBL,
is in alarm.
-SOP-605B, 125 VDC Switchgear and Distribution Systems, Batteries and
Battery Chargers, was used to restore power to the affected DC Bus.

Which of the following can be used to determine that a loss of DC power had occurred and what DC bus voltage will verify that substitute power sources have been energized?

Selecciona una de las siguientes respuestas posibles:

  • A. The Turbine Driven Auxiliary Feedwater Pump is running.
    Panel board voltage is at least 105 VDC on 2ED1.

  • B. Train B Switchgear Trip and Close power is lost.
    Panel board voltage is at least 105 VDC on 2ED1.

  • C. The Turbine Driven Auxiliary Feedwater Pump is running.
    Panel board voltage is at least 128 VDC on 2ED1.

  • D. Train B Switchgear Trip and Close power is lost.
    Panel board voltage is at least 128 VDC on 2ED1.

Explicación

Pregunta 70 de 87

1

Given the following conditions of Unit 1 DC Safeguards Bus voltage:
-DC Bus 1ED1 is at 135 volts and 1 amps CHARGE.
-DC Bus 1ED2 is at 134 volts and 2 amps CHARGE.
-DC Bus 1ED3 is at 135 volts and 1 amp CHARGE.
-DC Bus 1ED4 is at 134 volts and 2 amps CHARGE.

After a plant transient the following is observed:
-DC Bus 1ED1 is at 134 volts and 2 amps CHARGE.
-DC Bus 1ED2 is at 123 volts and 188 amps DISCHARGE.
-DC Bus 1ED3 is at 134 volts and 1 amp CHARGE.
-DC Bus 1ED4 is at 124 volts and 190 amps DISCHARGE.

Which of the following events has caused the change in DC Safeguards Bus voltage?

A loss of...

Selecciona una de las siguientes respuestas posibles:

  • A. Motor Control Center XEB1-1.

  • B. Safeguards Bus 1EA1.

  • C. Motor Control Center XEB2-1.

  • D. Safeguards Bus 1EA2.

Explicación

Pregunta 71 de 87

1

Which of the following would be the most probable cause of a 1-ALB-10B, Window 1.9 - 125 VDC SWITCH PNL 1ED3 TRBL alarm with associated 1-SSII-1 Train AA, Window 2.7 - 125 VDC alarm?

Bus 1ED3...

Selecciona una de las siguientes respuestas posibles:

  • A. overvoltage

  • B. undervoltage

  • C. overcurrent

  • D. undercurrent

Explicación

Pregunta 72 de 87

1

Given the following conditions:
-Unit 2 is operating at 100% power.
-All systems are in a normal alignment.
-125 VDC Bus 2ED2 deenergizes.

Which of the following describes the effect of this loss of power on Technical Specification required equipment?

Selecciona una de las siguientes respuestas posibles:

  • A. 2/1-8152, LTDN CNTMT ISOL VLV, will NOT be capable of being shut, requiring implementation of Containment Isolation Technical Specifications

  • B. Protection Bus 2PC2 loses power, requiring implementation of the Power Distribution Technical Specification requirements

  • C. SG ARVs 2-02 and 2-04 will NOT be capable of being operated from the Control Room, requiring SG ARV Technical Specification implementation

  • D. RCPs lose tripping capability, requiring RCS Technical Specification implementation

Explicación

Pregunta 73 de 87

1

Given the following indications on Unit 1 DC Safeguards Switch Panels (Buses) and Batteries:
-DC Switch Panel 1ED1 is at 135 volts with battery BT1ED1 at 2 amp CHARGE.
-DC Switch Panel 1ED2 is at 136 volts with battery BT1ED2 at 2 amp CHARGE.
-DC Switch Panel 1ED3 is at 135 volts with battery BT1ED3 at 1 amp CHARGE.
-DC Switch Panel 1ED4 is at 140 volts with battery BT1ED4 at 10 amp CHARGE.

Which of the following lists the status of the Unit 1 DC Safeguards batteries? (BT1ED1, BT1ED2, BT1ED3, BT1ED4)

Selecciona una de las siguientes respuestas posibles:

  • A. FLOAT, EQUALIZE, FLOAT, EQUALIZE

  • B. EQUALIZE, FLOAT, EQUALIZE, FLOAT

  • C. EQUALIZE, EQUALIZE, EQUALIZE, FLOAT

  • D. FLOAT, FLOAT, FLOAT, EQUALIZE

Explicación

Pregunta 74 de 87

1

Given the following conditions:
-Unit 1 was operating at 100% power.
-Centrifugal Charging Pump (CCP) 1-01 was running.
-A loss of 125 VDC Bus 1ED1 has occurred.
-While stabilizing the unit, a spurious SI occurred resulting in a start signal
being sent to both CCP 1-01 and Safety Injection Pump (SIP) 1-01, as well as
other pieces of equipment.

Concerning only CCP 1-01 and SIP 1-01, which of the following pump combinations will exist as a result of these failures?

Selecciona una de las siguientes respuestas posibles:

  • A. CCP 1-01 running, SIP 1-01 running

  • B. CCP 1-01 NOT running, SIP 1-01 running

  • C. CCP 1-01 running, SIP 1-01 NOT running

  • D. CCP 1-01 NOT running, SIP 1-01 NOT running

Explicación

Pregunta 75 de 87

1

Which of the following would be the response of the Train A Diesel Generator (DG) upon loss of Train A 125 VDC power?

Selecciona una de las siguientes respuestas posibles:

  • A. DG would NOT start on receipt of an emergency start signal, but would start on a normal start signal.

  • B. DG would NOT start on receipt of an emergency start signal, nor a normal start signal.

  • C. DG would start on either an emergency start or normal start signal, but would NOT be able to close the output breaker.

  • D. DG would NOT start on receipt of a normal start signal, but would start on an emergency start signal.

Explicación

Pregunta 76 de 87

1

Given the following conditions:
-Unit 1 is operating at 75% power.
-Annunciator 1-ALB-10B, Window 1.14 - BATT CHRG BC 1ED1-1/BC 1ED1- TRBL is in alarm.
-1ED1 Bus voltage is 120 VDC.
-Switchboard Feeder Breaker, 1ED1/2-9/BKR for Battery Charger BC 1ED1-2 is open and damaged.

Which of the following is an appropriate action assuming no other faults or
damage?

Selecciona una de las siguientes respuestas posibles:

  • A. Restore Battery Charger BC 1ED1-2 within 2 hours.

  • B. Place BC 1ED1-1 in service and initiate repairs to Breaker 1ED1/2-9/BKR.

  • C. Ensure DC power supply to Train B Steam Dump Solenoid Valves.

  • D. Load shed SWBD 1ED1 to ensure Safeguard Switchgear TRIP & CLOSE function.

Explicación

Pregunta 77 de 87

1

Given the following conditions:
-Unit 1 is operating at 100% power with all systems in normal alignment.
-1ED1/1-1/DSW, 125 VDC STATION BATTERY BT1ED1 DISCONNECT
SWITCH, was placed in OFF.

Which of the following would provide the Control Room with indication of this
condition?

Selecciona una de las siguientes respuestas posibles:

  • A. Low Bus Voltage indicated on DC Bus 1ED1 voltmeter on CB-11.

  • B. SSII Train A alarms for SSW, ECCS, CS, MDAFW, DG PWR, SFTY CH WTR, CR HVAC, CCW and RHR.

  • C. High amperage on Battery BT1ED1 ammeter on CB-11

  • D. SSII Train B alarms for SSW, ECCS, CS, MDAFW, DG PWR, SFTY CH WTR, CR HVAC, CCW and RHR.

Explicación

Pregunta 78 de 87

1

Given that a bus fault has caused 125/250 VDC Electrical Distribution Bus 1D3 to deenergize.

Which of the following is an effect of the loss of DC power?

Selecciona una de las siguientes respuestas posibles:

  • A. Main Turbine Generator EHC Pump breaker position is NOT available in the Control Room and an Operator must locally trip the breakers, if required.

  • B. Train B Reactor Trip Breaker position is available in the Control Room, but the shunt trip of the breaker is NOT available either from the Control Room or locally.

  • C. Main Feed Pump B Controller position is available in the Control Room, but the electrical trip of the pump is NOT available either from the Control Room or locally.

  • D. Reactor Coolant Pump breaker position is NOT available in the Control Room and an Operator must locally trip the breakers, if required.

Explicación

Pregunta 79 de 87

1

Given the following conditions:
-Unit 1 is at 2% power
-MDAFWPs 1-01 and 1-02 are supplying feedwater to the SGs
-Bus 1ED1, 125 VDC power fails to MDAFWP 1-01 breaker

Which of the following describes how the loss of DC control power affects the
1-01 MDAFWP breaker?

MDAFWP 1-01 breaker will ...

Selecciona una de las siguientes respuestas posibles:

  • A. trip, and CANNOT be closed from the MCB.

  • B. trip, but can be reclosed from the MCB.

  • C. remain closed, but can be tripped from the MCB.

  • D. remain closed and CANNOT be tripped from the MCB.

Explicación

Pregunta 80 de 87

1

Given the following conditions of Unit 1 DC Safeguards Bus voltage:
-DC Bus 1ED1 is at 134 volts and 2 amps CHARGE.
-DC Bus 1ED2 is at 135 volts and 1 amp CHARGE.
-DC Bus 1ED3 is at 135 volts and 1 amp CHARGE.
-DC Bus 1ED4 is at 134 volts and 2 amps CHARGE.

After a plant transient the following is observed:
-DC Bus 1ED1 is at 123 volts and 190 amps DISCHARGE.
-DC Bus 1ED2 is at 134 volts and 2 amps CHARGE.
-DC Bus 1ED3 is at 124 volts and 70 amps DISCHARGE.
-DC Bus 1ED4 is at 135 volts and 1 amp CHARGE.

Which of the following events has caused the change in DC Safeguards Bus voltage?

A loss of...

Selecciona una de las siguientes respuestas posibles:

  • A. Motor Control Center XEB1-1.

  • B. Safeguards Bus 1EA1.

  • C. Motor Control Center XEB2-1.

  • D. Safeguards Bus 1EA2.

Explicación

Pregunta 81 de 87

1

Given the following conditions:
-Battery BT-1ED1 is discharging during a Loss of All AC Power

Assuming the load on Train A Safeguards DC Bus 1ED1 does NOT change which of the following statements correctly describes Battery BT-1ED1 discharge rate (amps) as the battery is expended?

As Battery BT-1ED1 voltage lowers, the discharge rate in amps will...

Selecciona una de las siguientes respuestas posibles:

  • A. increase until the design battery capacity is exhausted.

  • B. be fairly constant until the design battery capacity (amp-hours) is exhausted and then will rapidly decrease.

  • C. decrease until the design battery capacity is exhausted.

  • D. initially decrease until approximately 50% design capacity had been expended and then increase until the battery has been exhausted.

Explicación

Pregunta 82 de 87

1

Given that a bus fault has caused 125/250 VDC Electrical Distribution Bus 1D2 to deenergize, which of the following plant components will be directly affected by the loss of DC power?

Selecciona una de las siguientes respuestas posibles:

  • A. Main Turbine Extended Turbine Protection (ETP) is not available.

  • B. Main Generator control is lost due to loss of the EHC control power.

  • C. Train B Reactor trip and Bypass breakers cannot shunt trip.

  • D. Main Feedwater Pumps cannot process any electrical trips.

Explicación

Pregunta 83 de 87

1

Given the following conditions on Unit 1:
-The Unit is operating at 100% power.
-No Safety related equipment is out of service.
-480 VAC 1E Bus 1EB1 has been lost due to an electrical fault.

Which of the following describes the status of the Train A Batteries and what Technical Specification is impacted?

Selecciona una de las siguientes respuestas posibles:

  • A. One of the two Battery Chargers connected to each of the Battery Buses 1ED1 and 1ED3 were lost. Batteries BT1ED1 and BT1ED3 remain on Float Charge.
    Technical Specification LCO 3.8.4, DC Sources-Operating.

  • B. Two Chargers were lost to DC Bus 1ED1. Battery BT1ED1 is discharging and Battery BT1ED3 remains on Float Charge. Technical Specification LCO 3.8.6, Battery Parameters.

  • C. One of two Battery Chargers available to Battery Buses 1ED1 and 1ED3 were lost but the standby Battery Charger breaker
    automatically closed. Batteries BT1ED1 and BT1ED3 remain on Float Charge.
    Technical Specification LCO 3.8.6, Battery Parameters.

  • D. One of two Battery Chargers available to each of the Battery
    Buses 1ED1 and 1ED3 were lost. If the Battery Chargers were in service then the associated battery will be discharging.
    Technical Specification LCO 3.8.4, DC Sources-Operating.

Explicación

Pregunta 84 de 87

1

In order to transition from MODE 5 to MODE 4, what are the required OPERABLE DC electrical sources?

Selecciona una de las siguientes respuestas posibles:

  • A. Both Train A & both Train B 125V 1E batteries ONLY

  • B. Both Train A & both Train B 125V 1E batteries and one full capacity battery charger for each battery ONLY

  • C. ALL 1E 125V batteries and ALL full capacity battery chargers for both A & B trains

  • D. Both Train A & both Train B 125V 1E batteries and one full capacity battery charger per train ONLY

Explicación

Pregunta 85 de 87

1

With Unit 1 in MODE 3 and Battery Charger BC1ED1-2 inoperable, which of the following would require entry into Tech Spec 3.8.4, "DC Sources - Operating," action statements?

Selecciona una de las siguientes respuestas posibles:

  • A. Battery Charger BC1ED1-1 "EQUALIZE" push button is depressed

  • B. Battery BT1ED2 voltage is 125 VDC

  • C. Battery BT1ED3 float current is 0 amps

  • D. Battery Charger BC1ED4-1 is placed under clearance after placing Battery Charger BC1ED4-2 in service

Explicación

Pregunta 86 de 87

1

With Unit 1 in MODE 5, which of the following describes a condition that would place the unit in a Technical Specification 3.8.10, DISTRIBUTION SYSTEMS - SHUTDOWN, ACTION statement?

Selecciona una de las siguientes respuestas posibles:

  • A. 24/48 V switchboard 1D1 is de-energized

  • B. 125 V 1E station batteries BT1ED1 and BT1ED2 are inoperable

  • C. Non-class 1E 125 V bus 1D3 is de-energized

  • D. Train "B" 125 V 1E bus 1ED2 is de-energized

Explicación

Pregunta 87 de 87

1

Given the following conditions:
-Unit 1 is in MODE 6 with core reload in progress.
-Train B safeguards batteries BT1ED2 and BT1ED4 are tagged out for replacement.
-A short circuit develops rendering safeguards battery BT1ED3 inoperable.

Which of the following Technical Specification actions are required?
1. Initiate action to restore BT1ED3 to OPERABLE within 1 hour.
2. Initiate action to restore BT1ED3 to OPERABLE Immediately.
3. Initiate action to restore IV1PC3 and IV1EC5 to OPERABLE within 1 hour.
4. Initiate action to restore IV1PC3 and IV1EC5 to OPERABLE Immediately.
5. Initiate action to restore safeguards bus1ED3 to OPERABLE within 1 hour.
6. Initiate action to restore safeguards bus1ED3 to OPERABLE Immediately.

Selecciona una de las siguientes respuestas posibles:

  • A. 1, 3, 5

  • B. 2, 4, 6

  • C. 1, 3, 6

  • D. 2, 4, 5

Explicación

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