ML21286A363

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1A Final RO Exam, Answer Key, References
ML21286A363
Person / Time
Site: Catawba  Duke Energy icon.png
Issue date: 10/13/2021
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Download: ML21286A363 (80)
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ML21286A363 ES-401 Site-Specific RO Written Examination Form ES-401-7 Cover Sheet U.S. Nuclear Regulatory Commission Site-Specific RO Written Examination Applicant Information Name:

Date: September 30, 2021 Facility/Unit Catawba Nuclear Station Region: I II III IV Reactor Type: W CE BW GE Start Time: Finish Time:

Instructions Use the answer sheets provided to document your answers. Staple this cover sheet on top of the answer sheets. To pass the examination, you must achieve a final grade of at least 80 percent. Examination papers will be collected 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> after the examination begins Applicant Certification All work done on this examination is my own. I have neither given nor received aid.

Applicants Signature Results Examination Value ___75___ Points Applicants Score ________ Points Applicants Grade ________ Percent

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 1 (1 point)

Given the following Unit 1 initial conditions:

  • Unit 1 was at 100% RTP
  • Core age has reached 325 EFPD
  • DRPI Data B power supply failure is being investigated by IAE
  • A Turbine runback has occurred due to a trip of 1A CFPT on lowering vacuum Subsequently:
  • Unit 1 Reactor is manually tripped following the loss of 1B CFPT
  • NC Temperature is 490 °F
  • The CRS has transitioned to EP/1/A/5000/ES-0.1 (Reactor Trip Response) and reached step 8:

In accordance with ES-0.1:

DRPI indication _____(1)_____ require emergency boration.

NC Temperature _____(2)_____ require emergency boration.

Which ONE of the following correctly completes the statement above?

REFERENCE PROVIDED A. 1. will

2. will B. 1. will
2. will NOT C. 1. will NOT
2. will D. 1. will NOT
2. will NOT Page 1 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 2 (1 point)

Given the following Unit 2 conditions:

  • The unit is in Mode 3
  • Pzr pressure is 1785 PSIG
  • Pzr Relief Tank (PRT) pressure is 10 PSIG
  • PRT temperature is 125°F
  • A Pzr code safety valve is leaking by its seat Which ONE of the following correctly identifies the approximate temperature that is indicated on the leaking safety valve discharge RTD?

REFERENCE PROVIDED A. 121 - 129°F B. 210 - 218°F C. 236 - 244°F D. 282 - 290°F Page 2 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 3 (1 point)

Given the following Unit 1 initial conditions:

  • A small break LOCA has occurred
  • EP/1/A/5000/E-1 (Loss of Reactor or Secondary Coolant) has been entered
  • Neither train of ICCM is available Subsequently:
  • The crew has transitioned to EP/1/A/5000/ES-1.2 (Post LOCA Cooldown and Depressurization)
  • S/G PORVs are being used for cooldown
  • Current NC pressure is 665 psig
  • Core exit thermocouple temperatures are 490°F
  • T-Colds are 487.7°F In accordance with E-1, the value of subcooling is _____(1)_____ .

Based on current conditions, steam header pressure is _____(2)_____ .

Which ONE of the following correctly completes the statements above?

REFERENCE PROVIDED A. 1. - 10° F

2. 608 psig B. 1. - 10° F
2. 593 psig C. 1. + 10° F
2. 608 psig D. 1. + 10° F
2. 593 psig Page 3 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 4 (1 point)

Given the following Unit 1 conditions:

  • The crew has entered EP/1/A/5000/FR-P.1 (Response to Imminent Pressurized Thermal Shock) due to a RED path condition on the Reactor Coolant Integrity CSF Status Tree.

FR-P.1 utilizes the parameters of NC pressure and __________ to determine if a large break LOCA has occurred.

Which ONE of the following correctly completes the statement above?

A. RVLIS level B. S/G pressure C. NC T-cold temperatures D. ND flow rate to cold legs Page 4 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 5 (1 point)

Given the following Unit 1 conditions:

  • Unit is in Mode 3
  • Rod control is capable of rod withdrawal
  • NC loops 1A, 1B, and 1D are in operation
  • 1A NC Pump Lower Bearing temperature is currently 190ºF and rising 5ºF per minute 1A NC Pump Lower Bearing temperature will reach trip setpoint in

_____(1)_____ .

Following the trip of 1A NCP, entry into the action statement of TS 3.4.5 (RCS Loops - MODE 3) _____(2)_____ required.

Which ONE of the following correctly completes the statements above?

A. 1. 7 minutes

2. is B. 1. 7 minutes
2. is NOT C. 1. 1 minute
2. is D. 1. 1 minute
2. is NOT Page 5 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 6 (1 point)

Given the following conditions on Unit 1:

  • The unit is at 100% RTP
  • 1A NV pump has tripped
  • Unit 1 letdown has isolated
  • The crew has entered AP/1/A/5500/012 (Loss of Charging or Letdown)

Based on these conditions, all cooling to NC pump lower bearings

_____(1)_____ been lost.

Per AP/12, prior to initiating letdown flow, 1NV-148 (Letdn Press Control) will be throttled to _____(2)_____ demand.

Which ONE of the following correctly completes the statements above?

A. 1. has

2. 45%

B. 1. has

2. 60%

C. 1. has NOT

2. 45%

D. 1. has NOT

2. 60%

Page 6 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 7 (1 point)

Given the following Unit 1 initial conditions:

  • Refueling was in progress when a loss of ND occurred
  • CRS has implemented AP/1/A/5500/019 (Loss of Residual Heat Removal System) Case III (Loss of ND With Large Vent Path Established)

Subsequently:

  • The reason for the loss of ND has been corrected
  • Crew is performing Enclosure 8 (Restoring an ND Train To Operation) to place 1A ND train in service In accordance with Enclosure 8:

The MINIMUM KC flow established to the ND heat exchanger is _____(1)_____

GPM.

Prior to starting the 1A ND pump, 1ND-27 (ND Hx 1A Bypass Ctrl) is placed in the _____(2)_____ position.

Which ONE of the following correctly completes the statements above?

A. 1. 5000

2. CLOSED B. 1. 5000
2. OPEN C. 1. 3000
2. CLOSED D. 1. 3000
2. OPEN Page 7 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 8 (1 point)

Given the following Unit 1 timeline:

1200

  • The Unit is at 100% RTP
  • 1B2 KC Pump is in service
  • 1B KC flow is 5000 gpm and stable
  • 1B KF is in service 1203
  • 1KC-15 (1B2 KC Pump Disch) is inadvertently closed 1205
  • No additional KC pumps have been started Following closure of 1KC-15, 1KC-156 (KF HX 1B Cool Wtr Otlt) _____(1)_____

automatically change position.

Assuming no operator action, once 1KC-15 is reopened 1AD-9 F/6 KC Train B Single Pump Runout _____(2)_____ alarm.

Which ONE of the following correctly completes the statements above?

A. 1. will

2. will B. 1. will NOT
2. will C. 1. will
2. will NOT D. 1. will NOT
2. will NOT Page 8 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 9 (1 point)

Given the following Unit 1 initial conditions:

  • Unit is at 100% RTP with surveillance testing in progress
  • Reactor Trip Breaker A (RTA) and Bypass Breaker B (BYB) are racked-in and closed Subsequently:
  • All efforts to trip the reactor from the control room were unsuccessful
  • Operators entered EP/1/A/5000/FR-S.1 (Response to Nuclear Power Generation/ATWS)
  • An AO was dispatched to locally trip the Reactor Based on the given conditions, the Reactor Trip Breaker A (RTA)

_____(1)_____ failed to operate as designed.

If successful in opening all Reactor Trip and Bypass breakers, then per FR-S.1, the AO _____(2)_____ required to open the MG set breakers locally.

Which ONE of the following correctly completes the statements above?

A. 1. shunt trip coil ONLY

2. is NOT B. 1. shunt trip AND undervoltage coils
2. is NOT C. 1. shunt trip coil ONLY
2. is D. 1. shunt trip AND undervoltage coils
2. is Page 9 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 10 (1 point)

Given the following Unit 2 conditions:

  • The Unit is at 45% RTP
  • The crew has entered AP/2/A/5500/028 (Secondary Steam Leak) due to a leak from the 2nd stage reheat steam tube bundle inside 2A MSR (location A)

The steam leak at location A, will cause Main Turbine Megawatts to _____(1)_____ .

In order to isolate the leak, AP/28 will direct the crew to _____(2)_____ .

Which ONE of the following correctly completes the statements above?

A. 1. rise

2. trip the Main Turbine B. 1. rise
2. trip the Reactor and close MSIVs C. 1. lower
2. trip the Main Turbine D. 1. lower
2. trip the Reactor and close MSIVs Page 10 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 11 (1 point)

Given the following Unit 2 conditions:

  • A seismic event has resulted in the following:

o 2A S/G has experienced a complete shear of the Main Steam line at the S/G outlet o 2D S/G has experienced a complete shear of the Main Feed line at the S/G inlet Steam Generator _____(1)_____ will lower to 0% WR level FIRST.

Procedural guidance to isolate 2D S/G is contained in _____(2)_____.

Which ONE of the following correctly completes the statements above?

A. 1. 2A

2. EP/2/A/5000/E-1 (Loss of Reactor or Secondary Coolant)

B. 1. 2A

2. EP/2/A/5000/E-2 (Faulted Steam Generator Isolation)

C. 1. 2D

2. EP/2/A/5000/E-1 (Loss of Reactor or Secondary Coolant)

D. 1. 2D

2. EP/2/A/5000/E-2 (Faulted Steam Generator Isolation)

Page 11 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 12 (1 point)

Given the following Unit 2 conditions:

  • A Loss of All Offsite Power has occurred
  • Both Unit 2 D/Gs started and loaded their associated bus
  • While monitoring D/G operating parameters, the local operator notes that D/G 2B VOLTS indicates 3925 V In order to adjust 2B D/G Voltage, local controls will be operated on the 2B Diesel _____(1)_____ Control Panel .

Following this adjustment, 2B D/G AMPS will be _____(2)_____ .

Which ONE of the following correctly completes the statements above?

A. 1. Engine

2. lower B. 1. Generator
2. lower C. 1. Engine
2. higher D. 1. Generator
2. higher Page 12 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 13 (1 point)

Given the following initial conditions:

  • 1B RN Pump in service
  • 1B1 KC Pump in service
  • 2A1 KC Pump in service Subsequently:
  • Both units enter AP/0/A/5500/030 (Plant Flooding), Enclosure 8 (Flooding From RN) following discovery of a large RN leak on the 1A Essential Header
  • Per AP/30 guidance, the crew has isolated the 1A RN Essential Header (ONLY)

Based on current conditions:

Cooling water supply _____(1)_____ available to the 1A KD Heat Exchanger.

Mini-Flow protection _____(2)_____ available for the 1B RN Pump.

Which ONE of the following correctly completes the statements above?

A. 1. is

2. is B. 1. is
2. is NOT C. 1. is NOT
2. is D. 1. is NOT
2. is NOT Page 13 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 14 (1 point)

Given the following Unit 1 initial conditions:

  • The crew has entered AP/0/A/5500/022 (Loss of Instrument Air) following a complete loss of VI
  • Both Reactors have been tripped Subsequently:
  • Unit 1 has entered EP/1/A/5000/FR-H.1 (Loss of Heat Sink)
  • Feed and Bleed criteria has been met In order to establish Feed and Bleed, motive force will be available to

_____(1)_____ Pressurizer PORVs supplied by _____(2)_____ .

Which ONE of the following correctly completes the statement above?

A. 1. two

2. cold leg accumulators B. 1. two
2. individual air accumulators C. 1. three
2. cold leg accumulators D. 1. three
2. individual air accumulators Page 14 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 15 (1 point)

Given the following Unit 1 initial conditions:

  • The unit is at 100% RTP with Main Generator power factor at 0.99 lagging
  • Unit 1 Voltage Regulator is in "Manual" per Engineering's request
  • The READY status light for the Voltage Regulator Manual/Auto switch is DARK Subsequently:
  • Generator Voltage and MVARs begin fluctuating
  • The CRS enters AP/1/A/5500/037 (Generator Voltage and Electric Grid Disturbances), Case I (Abnormal Generator or Grid Voltage) o The CRS has directed the OATC to operate the Voltage Regulator to maintain Generator MVARS within the Generator Capability Curve With the Voltage Regulator in "Manual", operation of the Voltage Adjust RAISE/LOWER pushbutton _____(1)_____ adjust Reactive Power.

Placing the Voltage Regulator Manual/Auto switch in Auto (with the READY status light dark) _____(2)_____ transfer the Voltage Regulator to automatic control.

Which ONE of the following correctly completes the statements above?

A. 1. will

2. will B. 1. will
2. will NOT C. 1. will NOT
2. will D. 1. will NOT
2. will NOT Page 15 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 16 (1 point)

Given the following initial conditions on Unit 1:

  • A LOCA outside containment has occurred
  • The crew suspects the leak is located in the 1B ND header
  • EP/1/A/5000/ECA-1.2 (LOCA Outside Containment) has been entered Subsequently:
  • 1B ND header has been isolated. 30 seconds following header isolation, indications are as follows:

o Unit 1 PZR level is 0%

o Subcooling is -5°F and stable o NC Pressure is 1050 psig and slowly lowering o RVLIS level is 61.3% and slowly rising In accordance with ECA-1.2:

The crew _____(1)_____ permitted to isolate 1B ND header prior to 1A ND header.

With given indications, _____(2)_____ will provide the best diagnostic of leak isolation.

Which ONE of the following correctly completes the statements above?

A. 1. is

2. NC pressure B. 1. is NOT
2. NC pressure C. 1. is
2. RVLIS level D. 1. is NOT
2. RVLIS level Page 16 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 17 (1 point)

Given the following Unit 1 conditions:

  • A Safety Injection due to Hi Containment Pressure has occurred
  • Containment pressure peaked at 2.7 psig and is now slowly lowering
  • The crew has implemented EP/1/A/5000/FR-H.1 (Response to Loss of Secondary Heat Sink)
  • All attempts to restore CA flow have been unsuccessful In accordance with FR-H.1:

The NEXT source of feed water attempted for restoration of flow to the S/Gs is through the CM/CF system using _____(1)_____.

The crew will be required to establish bleed and feed when W/R level in at least 3 S/Gs is less than a MAXIMUM level of _____(2)_____.

Which ONE of the following correctly completes the statements above?

A. 1. either Main Feed Water pump

2. 24%

B. 1. either Main Feed Water pump

2. 36%

C. 1. Hotwell and Booster pumps

2. 24%

D. 1. Hotwell and Booster pumps

2. 36%

Page 17 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 18 (1 point)

Given the following Unit 1 conditions:

  • EP/1/A/5000/ECA-1.1 (Loss of Emergency Coolant Recirculation) is in progress
  • NC Pressure is 1700 psig
  • FWST level is trending down

_____(1)_____ are currently providing injection flow into the NC System.

Per ECA-1.1, as the FWST level lowers less than _____(2)_____ the operator will secure these pumps.

Which ONE of the following correctly completes the statements above?

A. 1. NV AND NI Pumps

2. 20%

B. 1. NV AND NI Pumps

2. 5%

C. 1. ONLY NV Pumps

2. 20%

D. 1. ONLY NV Pumps

2. 5%

Page 18 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 19 (1 point)

Given the following Unit 1 initial conditions:

  • Unit is in Mode 6 performing core loading
  • Unit 1 TRN A SMM BORON DILUTION INTLKS switch is in the Enable position
  • Unit 1 TRN B SMM BORON DILUTION INTLKS switch is in the Defeat position
  • The VCT Outlet Valve Interlock Keyswitch is in the Normal position Subsequently:
  • The OATC has just reset Shutdown Margin Monitor setpoints on 1A and 1B trains
  • An error has resulted in mispositioning of several fuel assemblies o This mispositioning has resulted in a critical array and rising count rate 1AD-2 E(F)/2 Train A(B) Shutdown Margin Alarm will actuate once count rate rises by a MINIMUM factor of _____(1)_____ .

Following alarm actuation, 1A and 1B NV Pump suction will be aligned to the

_____(2)_____ .

Which ONE of the following correctly completes the statements above?

A. 1. two

2. VCT B. 1. two
2. FWST C. 1. three
2. VCT D. 1. three
2. FWST Page 19 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 20 (1 point)

Given the following Unit 1 initial conditions:

  • Unit is at 100% RTP
  • Letdown flow is 85 gpm aligned through the 1NV-10A (Letdn Orif 1B Otlt Cont Isol)

Subsequently:

  • 1A S/G develops a tube leak
  • 1NV-294 (NV Pmps A&B Disch Flow Ctrl) has been fully opened o Pressurizer level continues to lower at 0.1% / minute
  • The CRS desires letdown flow reduction to 45 gpm Prior to this event, 1NV-849 (Letdn Flow Var Orif Ctrl) SLIM station was in

_____(1)_____ .

Per AP/10, letdown flow reduction will be accomplished via the

_____(2)_____ .

Which ONE of the following correctly completes the statements above?

A. 1. manual

2. 45 gpm orifice B. 1. manual
2. variable orifice C. 1. automatic
2. 45 gpm orifice D. 1. automatic
2. variable orifice Page 20 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 21 (1 point)

Given the following conditions on Unit 1:

  • Reactor power is currently 7%
  • In service CFPT vacuum, and Main Condenser vacuum, is currently 17 Hg and lowering In accordance with AP/23, a reactor trip _____(1)_____ required.

Main Condenser steam dumps _____(2)_____ currently available.

Which ONE of the following correctly completes the statements above?

A. 1. is

2. are B. 1. is
2. are NOT C. 1. is NOT
2. are D. 1. is NOT
2. are NOT Page 21 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 22 (1 point)

Given the following conditions:

  • A planned Liquid Waste Release of Waste Monitor Tank (WMT) A was initiated at 1110 The following timeline of events then occurs:

1120 1RAD-1, C/5 (EMF-49 LIQUID WASTE DISCH HI RAD) alarms 1130 The release is manually re-initiated without re-sampling 1145 1RAD-1, C/5 (EMF-49 LIQUID WASTE DISCH HI RAD) alarms 1155 The release is manually re-initiated without re-sampling 1215 1RAD-1, C/5 (EMF-49 LIQUID WASTE DISCH HI RAD) alarms The release _____(1)_____ be manually re-initiated, without re-sampling, per OP/0/B/6500/113 (Operations Liquid Waste Release).

The release was automatically isolated by closure of _____(2)_____ .

Which ONE of the following correctly completes the statements above?

A. 1. can

2. 1WL-X28 B. 1. can
2. 1WL-124 C. 1. can NOT
2. 1WL-X28 D. 1. can NOT
2. 1WL-124 Page 22 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 23 (1 point)

Given the following Unit 1 initial condition:

  • The crew has entered EP/1/A/5000/FR-Z.1 (Response to High Containment Pressure) due to a valid red path In accordance with FR-Z.1, Enclosure 3 (Containment Isolation VX System Verification), the crew will verify Containment Air Return Fans are operating if the elapsed time since Phase B actuation is greater than _____(1)_____ and secured if containment pressure lowers below _____(2)_____ .

Which ONE of the following correctly completes the statement above?

A. 1. 9 minutes

2. 0.9 PSIG B. 1. 9 minutes
2. 0.3 PSIG C. 1. 10 seconds
2. 0.9 PSIG D. 1. 10 seconds
2. 0.3 PSIG Page 23 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 24 (1 point)

Given the following Unit 1 initial conditions:

  • A Loss of Off-Site Power (LOOP) has occurred
  • Due to multiple equipment failures, the crew has implemented EP/1/A/5000/FR-C.1 (Response To Inadequate Core Cooling)
  • Containment pressure has risen to 2.6 psig and stabilized
  • ECCS steam pressure has been blocked in preparation for cooldown Subsequently:
  • Operators are preparing to depressurize intact steam generators to 140 PSIG Based on the conditions above:

Operation of S/G PORVs _____(1)_____ require depressing the SM PORV TRAIN A(B) RESET pushbutton.

In order to establish required cooldown rate, the OATC _____(2)_____ rotate all S/G PORV controllers to the full open position.

Which ONE of the following correctly completes the statements above?

A. 1. will

2. will B. 1. will
2. will NOT C. 1. will NOT
2. will D. 1. will NOT
2. will NOT Page 24 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 25 (1 point)

Given the following Unit 1 conditions:

  • A medium break LOCA has occurred
  • EP/1/A/5000/E-1 (Loss of Reactor Coolant or Secondary Coolant) has been implemented and the crew is evaluating Safety Injection termination criteria
  • The BOP reports the following data:

o NC pressure is 1200 PSIG and STABLE o Containment pressure is 3.3 PSIG and trending down o NC subcooling is 2°F o Pressurizer level is 17% and STABLE Based on S/I termination criteria of E-1:

NC Pressure requirement _____(1)_____ met.

Pressurizer level requirement _____(2)_____ met.

Which ONE of the following correctly completes the statement above?

A. 1. is

2. is B. 1. is NOT
2. is C. 1. is
2. is NOT D. 1. is NOT
2. is NOT Page 25 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 26 (1 point)

Given the following Unit 1 initial conditions:

  • The Unit is at 100% RTP Subsequently:

1100 A LOCA occurs 1215 Containment sump level is 13 feet and slowly rising If containment sump level is rising at a constant rate of 0.25 feet per minute, EP/1/A/5000/FR-Z.2 (Response to Containment Flooding) entry will be REQUIRED at _____(1)_____ .

Valves, inside containment, NOT qualified for submergence will be isolated by an _____(2)_____ signal.

Which ONE of the following correctly completes the statements above?

A. 1. 1225

2. ST B. 1. 1245
2. ST C. 1. 1225
2. SP D. 1. 1245
2. SP Page 26 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 27 (1 point)

Given the following Unit 1 conditions:

  • Containment pressure peaked at 2.8 PSIG, and is now 2.2 PSIG and slowly lowering
  • Crew has entered EP/1/A/5000/ES-1.2 (Post LOCA Cooldown and Depressurization) and is performing the initial cooldown In accordance with ES-1.2:

The INITIAL cooldown will be started using the _____(1)_____.

With rates established, per the graphic above, the cooldown _____(2)_____

continue at this time.

Which ONE of the following correctly completes the statements above?

A. 1. S/G PORVs

2. can NOT B. 1. S/G PORVs
2. can C. 1. Condenser Steam Dumps
2. can NOT D. 1. Condenser Steam Dumps
2. can Page 27 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 28 (1 point)

Given the following Unit 1 conditions:

  • The Unit is at 100% RTP
  • Total charging flow is currently 90 gpm
  • 1NV-294 (NV Pmps A&B Disch Flow Ctrl) is in MANUAL
  • 1NV-309 (Seal Water Injection Flow) is in AUTO Assuming stable plant conditions, as 1NV-294 is throttled CLOSED, 1NV-309 will throttle in the _____(1)_____ direction in order to maintain _____(2)_____

seal injection flow.

Which ONE of the following correctly completes the statements above?

A. 1. OPEN

2. 32 gpm B. 1. CLOSED
2. 32 gpm C. 1. OPEN
2. 40 gpm D. 1. CLOSED
2. 40 gpm Page 28 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 29 (1 point)

Concerning operation of the Unit 1 Volume Control Tank (VCT):

A loss of power to 1LT-5761 (VCT Level CH 1) _____(1)_____ result in a DCS Alternate Action.

A loss of 1ERPA will result in a loss of _____(2)_____ makeup capability to the VCT.

Consider each statement separately Which ONE of the following correctly completes the statements above?

A. 1. will

2. auto ONLY B. 1. will
2. auto AND manual C. 1. will NOT
2. auto ONLY D. 1. will NOT
2. auto AND manual Page 29 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 30 (1 point)

Given the following Unit 2 initial conditions:

  • Unit is in Mode 4
  • 2A ND train in service in RHR Mode
  • 2B ND train remains in Injection Mode Subsequently:
  • Instrument Air is lost to 2ND-26 (ND Hx 2A Outlet Ctrl)

Assuming no operator acton:

ND system flow _____(1)_____ automatically adjust to compensate for the change caused by this malfunction.

2A ND Heat Exchanger outlet temperature will _____(2)_____ .

Which ONE of the following correctly completes the statements above?

A. 1. will

2. rise B. 1. will NOT
2. rise C. 1. will
2. lower D. 1. will NOT
2. lower Page 30 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 31 (1 point)

Given the following Unit 2 conditions:

  • Unit is at 75% RTP
  • Several banks of FWST heaters have failed "ON"
  • Current FWST temperature is 91°F
  • FWST temperature is rising at a rate of 0.5°F/min Based on the conditions above, FWST temperature will reach the T.S. 3.5.4 (Refueling Water Storage Tank (RWST)) limit in a MINIMUM of _____(1)_____

minutes.

Normally, Group 1 FWST heaters cycle automatically to maintain FWST temperature greater than T.S. 3.5.4 MINIMUM of _____(2)_____ .

Which ONE of the following correctly completes the statements above?

A. 1. 10

2. 65°F B. 1. 10
2. 70°F C. 1. 18
2. 65°F D. 1. 18
2. 70°F Page 31 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 32 (1 point)

Given the following Unit 1 timeline:

1000

  • Following the trip, a Pressurizer Safety valve opens, and will NOT reseat
  • The PRT rupture disks function as designed
  • Containment pressure is 0.1 psig and rising at 0.03 psig every 5 minutes
  • Lower Containment temperature is 110°F and rising at 2°F every 5 minutes Assuming these conditions remain constant, and concerning only the application of LCOs 3.6.4 and 3.6.5 Plant conditions will FIRST require entry into LCO _____(1)_____ .

At 1030, conditions for entry into _____(2)_____ will be met.

Which ONE of the following correctly completes the statements above?

LEGEND:

LCO 3.6.4 (Containment Pressure)

LCO 3.6.5 (Containment Air Temperature)

A. 1. 3.6.4

2. 3.6.4 ONLY B. 1. 3.6.4
2. 3.6.4 AND 3.6.5 C. 1. 3.6.5
2. 3.6.5 ONLY D. 1. 3.6.5
2. 3.6.4 AND 3.6.5 Page 32 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 33 (1 point)

A LOCA has occurred on Unit 1 at Time = 0 minutes. Given the following containment pressure trend:

At Time = 3 minutes, the PRT _____(1)_____ be cooled using the NCDT Heat Exchanger.

At Time = 3 minutes, the PRT _____(2)_____ be cooled using spray flow from the RMWST.

Which ONE of the following correctly completes the statements above?

A. 1. can

2. can B. 1. can
2. can NOT C. 1. can NOT
2. can D. 1. can NOT
2. can NOT Page 33 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 34 (1 point)

Unit 1 is in Mode 3 when the following alarm is received:

  • 1AD-6, E/1 (NCP A Thermal Barrier KC Outlet Hi/Lo Flow)

The flow trend is given below:

(1) At what time on the above graph did 1KC-394A (NC Pump 1A Therm Bar Otlt) automatically close?

(2) If the NCP 1A thermal barrier cannot be isolated from the KC System by any means, how is over pressurization of the KC surge tanks prevented?

A. 1. 100 seconds

2. The KC surge tanks vent line is large enough to prevent over pressurization.

B. 1. 130 seconds

2. The KC surge tanks vent line is large enough to prevent over pressurization.

C. 1. 100 seconds

2. The KC surge tanks relief valve to the KC drain sump is large enough to prevent over pressurization.

D. 1. 130 seconds

2. The KC surge tanks relief valve to the KC drain sump is large enough to prevent over pressurization.

Page 34 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 35 (1 point)

Given the following Unit 1 conditions:

  • The crew has entered AP/1/A/5500/017 (Loss of Control Room) due to a Security Event
  • Transfer to the SSF has been completed Based on the conditions above, NC System Pressure control will be accomplished via use of PZR Heater Group _____(1)_____ which will be powered from _____(2)_____.

Which ONE of the following correctly completes the statement above?

A. 1. A

2. 1LXH B. 1. A
2. SMXG C. 1. D
2. 1LXH D. 1. D
2. SMXG Page 35 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 36 (1 point)

Given the following Unit 1 conditions:

  • Unit is at 100% RTP
  • A slight cooldown of the NC system causes the "C" PZR heaters to be full "on"
  • A malfunction of two PZR pressure transmitters causes an Alternate Action to occur on the Pressurizer Pressure Control System Assuming NO operator actions:

The PZR Pressure Master will be in _____(1)_____ control AND C Heaters

_____(2)_____ be energized.

Which ONE of the following correctly completes the statement above?

A. 1. Manual

2. will B. 1. Manual
2. will NOT C. 1. Automatic
2. will D. 1. Automatic
2. will NOT Page 36 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 37 (1 point)

Given the following Unit 1 conditions:

  • Reactor startup is in progress
  • The permissive P-6 status light on 1SI-18 has just LIT
  • Reactor power is rising In accordance with PT/0/A/4150/019 (1/M Approach to Criticality), the operator will manually block the _____(1)_____ high flux reactor trip. Following this, the reactor trip setpoint for high flux is _____(2)_____ .

Which ONE of the following correctly completes the statements above?

A. 1. Source Range

2. 10%

B. 1. Source Range

2. 25%

C. 1. Intermediate Range

2. 10%

D. 1. Intermediate Range

2. 25%

Page 37 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 38 (1 point)

Given the following initial conditions:

  • Both units are at 100% RTP Subsequently:
  • An inadvertent 1A Train Safety Injection occurs As a result of this event and assuming no operator actions:

The 1B Aux Building Unfiltered Exhaust Fan (ABUFXF) _____(1)_____

secured.

The 2A Aux Building Unfiltered Exhaust Fan (ABUFXF) _____(2)_____

secured.

Which ONE of the following correctly completes the statements above?

A. 1. is

2. is B. 1. is
2. is NOT C. 1. is NOT
2. is D. 1. is NOT
2. is NOT Page 38 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 39 (1 point)

Concerning operation of the Containment Ventilation Units:

Under normal conditions, Containment Ventilation Units are cooled by the

_____(1)_____ system.

Containment Ventilation cooling water supply is isolated by a _____(2)_____

signal.

Which ONE of the following correctly completes the statements above?

A. 1. YV

2. Phase A B. 1. YV
2. Phase B C. 1. RN
2. Phase A D. 1. RN
2. Phase B Page 39 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 40 (1 point)

Given the following Unit 1 conditions:

  • Operators are performing Aux Safeguards testing
  • A spurious automatic signal caused 1NF-233B (Containment Return Isolation) to inadvertently close during the testing 1NF-233B was closed by an inadvertent _____(1)_____ signal.

The glycol expansion tank _____(2)_____ overflow inside containment.

Which ONE of the following correctly completes the statements above?

A. 1. ST

2. will NOT B. 1. SP
2. will NOT C. 1. ST
2. will D. 1. SP
2. will Page 40 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 41 (1 point)

Given the following Unit 1 conditions:

  • Unit is in Mode 4
  • It has been determined that eight Ice Condenser Intermediate Deck doors will not open due to excessive ice buildup Based on the conditions listed above, peak pressure following a LOCA will be reached _____(1)_____ than normal.

Tech Spec 3.6.13 (Ice Condenser Doors) _____(2)_____ applicable.

Which ONE of the following correctly completes the statements above?

A. 1. sooner

2. is B. 1. later
2. is C. 1. sooner
2. is NOT D. 1. later
2. is NOT Page 41 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 42 (1 point)

Given the following Unit 1 conditions:

  • The crew is performing EP/1/A/5000/ES-1.3 (Transfer To Cold Leg Recirculation)
  • Containment pressure is 3.2 PSIG and rising slowly ES-1.3 will require starting _____(1)_____ NS pump(s).

Based on the conditions above, if a loss of NS flow occurs, a Containment ORANGE path _____(2)_____ occur.

Which ONE of the following correctly completes the statements above?

A. 1. both

2. will B. 1. ONLY one
2. will C. 1. both
2. will NOT D. 1. ONLY one
2. will NOT Page 42 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 43 (1 point)

Given the following Unit 1 timeline:

0800 Reactor trip and Safety Injection initiated due to large break LOCA 0845 Crew enters EP/1/A/5000/ES-1.3 (Transfer to Cold Leg Recirculation)

  • Containment pressure is currently 3.0 psig and rising at 0.8 psig / min
  • Crew is unable to align either Containment Spray pump for recirculation per Enclosure 2 (Aligning NS for Recirculation)

In accordance with EP/1/A/5000/FR-Z.1 (Response to High Containment Pressure), the earliest time that the crew will align ND Spray is __________ .

Which ONE of the following correctly completes the statement above?

A. 0845 B. 0850 C. 0900 D. 0930 Page 43 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 44 (1 point)

Given the following Unit 1 initial conditions:

  • The Unit is at 63% RTP following a refueling outage
  • AP/1/A/5500/028 (Secondary Steam Leak) has been entered following the discovery of a leak on the Unit 1 Main Turbine Crossover line Subsequently:
  • The Unit 1 Main Turbine is tripped to isolate the leak At this time, _____(1)_____ steam dumps will operate to control main steam pressure at approximately _____(2)_____ psig.

Which ONE of the following correctly completes the statement above?

A. 1. ONLY condenser

2. 1085 B. 1. ONLY condenser
2. 1115 C. 1. condenser AND atmospheric
2. 1085 D. 1. condenser AND atmospheric
2. 1115 Page 44 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 45 (1 point)

Given the following Unit 1 conditions:

  • Following a refueling outage, the operating crew began a power escalation
  • Due to chemistry concerns, the unit has been placed in hold at 65%
  • A tube leak has developed in 1A S/G In accordance with CSD-CP-CNS-0020 (CNS Primary to Secondary Leak Rate Monitoring Program), leak rate monitoring will be based on readings obtained from __________ .

Which ONE of the following correctly completes the statement above?

COMPONENT LEGEND:

1EMF-29 (Steam Line 1A) 1EMF-33 (Condenser Air Ejector Exhaust) 1EMF-71 (S/G A Leakage)

A. 1EMF-29 ONLY B. 1EMF-71 ONLY C. 1EMF-33 AND 1EMF-29 D. 1EMF-33 AND 1EMF-71 Page 45 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 46 (1 point)

Given the following Unit 1 conditions:

  • The Unit is at 12% RTP and rising DCS will maintain S/G Level Control for each S/G in the LO Power mode until a MAXIMUM Selected CF Flow of _____(1)_____ is reached on each S/G.

With DCS in the LO Power mode, the CF Control Valves will start to OPEN when the CF Control Bypass Valves demand signal reaches a MINIMUM of

_____(2)_____.

Which ONE of the following correctly completes the statements above?

A. 1. 17%

2. 55%

B. 1. 17%

2. 65%

C. 1. 20%

2. 55%

D. 1. 20%

2. 65%

Page 46 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 47 (1 point)

Given the following Unit 1 conditions:

  • All S/G Narrow Range levels are OFF-Scale LOW In order to meet secondary heat sink requirements CA flow must be greater than a MINIMUM value of _____(1)_____ GPM With regard to core age, more decay heat will be generated following a reactor trip at the _____(2)_____ of core life.

Which ONE of the following correctly completes the statements above?

A. 1. 1000

2. beginning B. 1. 1000
2. end C. 1. 450
2. beginning D. 1. 450
2. end Page 47 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 48 (1 point)

Given the following Unit 1 conditions:

  • Unit is at 100% RTP
  • 1B Transformer Loss of Cooler Power results in a Zone B Lockout The 1B NCP supply breaker is located on the _____(1)_____ side of 1TB Switchgear.

Following the Zone B Lockout, the 1B NCP _____(2)_____ continue to operate.

Which ONE of the following correctly completes the statements above?

A. 1. long

2. will B. 1. long
2. will NOT C. 1. short
2. will D. 1. short
2. will NOT Page 48 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 49 (1 point)

Given the following Unit 1 conditions:

  • 1KXIB has experienced a complete loss of DC input voltage
  • Stable power is restored two (2) minutes later Based on the conditions above, An indication used to determine that the backup power supply has been aligned is the

_____(1)_____ light LIT.

When 1KXIB loss of voltage condition clears, the normal power supply

_____(2)_____ be automatically realigned.

Which ONE of the following correctly completes the statements above?

A. 1. 1KXMB In Sync

2. will NOT B. 1. 1KXMB In Sync
2. will C. 1. 1KXAB Alternate AC Source Supplying Load
2. will NOT D. 1. 1KXAB Alternate AC Source Supplying Load
2. will Page 49 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 50 (1 point)

Concerning operation of the Emergency Diesel Generators:

In accordance with OP/1/A/6350/002 (Diesel Generator Operation), an inspection for water accumulation in the 1A D/G is performed by opening

_____(1)_____ . This inspection is performed _____(2)_____ D/G operational testing.

Which ONE of the following correctly completes the statements above?

A. 1. Cylinder indicator cocks 1L - 8L and 1R - 8R

2. prior to B. 1. Cylinder indicator cocks 1L - 8L and 1R - 8R
2. following C. 1. 1ZD-1 (1A D/G Eng Crankcase Vent Drip Leg Drain)
2. prior to D. 1. 1ZD-1 (1A D/G Eng Crankcase Vent Drip Leg Drain)
2. following Page 50 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 51 (1 point)

Given the following Unit 2 initial conditions:

  • Unit was operating at 100% RTP
  • A containment air release (VQ) was in progress Subsequently:
  • B Train safety injection failed to actuate and was performed manually when it was recognized by the crew
  • The following indications are noted for:

o Containment pressure o 2EMF-36 (Unit Vent Gas Monitor) o 2EMF-39 (Containment Gas Monitor) o E/S Load Sequencers status lights Time 0200 0201 0202 0203 Containment pressure (psig) 0.5 1.1 1.4 1.8 2EMF-36 Trip 2 Light LIT LIT LIT LIT 2EMF-39 Trip 2 Light DARK LIT LIT LIT E/S LOAD SEQ ACTUATED DARK DARK LIT LIT TRAIN A status light E/S LOAD SEQ ACTUATED DARK DARK DARK LIT TRAIN B status light Based on the above indications and conditions, what is the earliest time that an operator can be assured that 2VQ-3B (VQ Fan Suct From Cont Isol) has received a close signal?

A. 0200 B. 0201 C. 0202 D. 0203 Page 51 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 52 (1 point)

Given the following Unit 1 conditions:

  • A Large Break LOCA has occurred
  • The crew is performing EP/1/A/5000/ES-1.3 (Transfer To Cold Leg Recirculation)
  • The BOP is instructed to align NS for recirc per Enclosure 2 (Aligning NS for Recirculation)

RN flow through the NS Heat Exchanger will be aligned when/if Containment pressure reaches a MINIMUM of _____(1)_____ .

Once aligned, a CAUTION in ES-1.3 states that RN flow shall not exceed a MAXIMUM of _____(2)_____ to prevent damage to the NS Heat Exchanger tubes.

Which ONE of the following correctly completes the statements above?

A. 1. 1 psig

2. 5700 GPM B. 1. 1 psig
2. 4650 GPM C. 1. 3 psig
2. 5700 GPM D. 1. 3 psig
2. 4650 GPM Page 52 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 53 (1 point)

Given the following conditions:

  • Unit 1 is in Mode 5
  • Unit 2 is at 100% RTP
  • 1A train of ND is in service
  • Both units enter AP/0/A/5500/022 (Loss of Instrument Air) following a VI pipe rupture Per AP/22:

Once positioned per procedure, 1NI-173A (ND Hdr 1A To Cold Legs C&D) will be throttled _____(1)_____ if NC temperature begins to rise.

Unit 2 Reactor Trip will be required at a MAXIMUM lowering VI pressure of

_____(2)_____ .

Which ONE of the following correctly completes the statements above?

A. 1. OPEN

2. 55 psig B. 1. CLOSED
2. 55 psig C. 1. OPEN
2. 76 psig D. 1. CLOSED
2. 76 psig Page 53 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 54 (1 point)

Given the following Unit 1 conditions:

  • Unit is at 100% RTP
  • Train 1B Safety Injection failed to automatically actuate Assuming no operator action:

Phase A (St) isolation has been initiated on train _____(1)_____.

Phase B (Sp) isolation _____(2)_____ been initiated.

Which one of the following correctly completes the statements above?

A. 1. 1A ONLY

2. has B. 1. 1A ONLY
2. has NOT C. 1. 1A AND 1B
2. has D. 1. 1A AND 1B
2. has NOT Page 54 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 55 (1 point)

Given the following Unit 1 conditions:

  • A rapid downpower is in progress due to a secondary steam leak inside Containment
  • 1A, 1B, and 1D Lower Containment Vent Units (LCVU) are in operation
  • Current Unit 1 Containment pressure is 0.58 psig and rising slowly Assuming no operator action, 1RN-473 (LCVU A Full Flow Valve) _____(1)_____ currently open.

1A LCVU _____(2)_____ operating in Hi Speed.

Which ONE of the following correctly completes the statements above?

A. 1. is

2. is B. 1. is
2. is NOT C. 1. is NOT
2. is D. 1. is NOT
2. is NOT Page 55 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 56 (1 point)

Concerning Reactor Trip Breaker 1B:

The Undervoltage coil receives power auctioneered from _____(1)_____ and 1ERPD and is _____(2)_____ to actuate.

Which ONE of the following correctly completes the statement above?

A. 1. 1ERPB

2. energized B. 1. 1ERPB
2. de-energized C. 1. 1ERPC
2. energized D. 1. 1ERPC
2. de-energized Page 56 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 57 (1 point)

Concerning the Pressurizer Cold Cal Channel:

The Pressurizer level Cold Calibrated Channel is calibrated for

_____(1)_____. This channel _____(2)_____ a required safety related indication.

Which ONE of the following correctly completes the statements above?

A. 1. 100°F

2. is B. 1. 100°F
2. is NOT C. 1. 120°F
2. is D. 1. 120°F
2. is NOT Page 57 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 58 (1 point)

Given the following Unit 1 initial conditions:

  • Unit is at 12% RTP following startup
  • Required actions for being greater than P-10 have been taken Subsequently:
  • 1ERPA de-energizes As a result of this failure:

Power Range detector N-41 will lose _____(1)_____.

The crew will FIRST enter _____(2)_____.

Which ONE of the following correctly completes the statements above?

A. 1. control power ONLY

2. EP/1/A/5000/E-0 (Reactor Trip or Safety Injection)

B. 1. control power ONLY

2. AP/1/A/5500/016 (Malfunction of Nuclear Instrumentation)

C. 1. control and instrument power

2. EP/1/A/5000/E-0 (Reactor Trip or Safety Injection)

D. 1. control and instrument power

2. AP/1/A/5500/016 (Malfunction of Nuclear Instrumentation)

Page 58 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 59 (1 point)

Given the following Unit 1 conditions:

  • A Shift Maintenance Technician performing Reactor Building rounds reports that the Ice Condenser Inlet Door Positioning Monitor System panel has no indicating lights lit Which one of the following is the minimum action required to maintain compliance with SLC 16.6-3 Inlet Door Position Monitoring System?

A. Immediately verify the ice bed temperature is less than or equal to 27 °F B. Immediately verify the Ice Bed Temperature Monitoring System is Functional C. Within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> verify the ice bed temperature is less than or equal to 27 °F D. Within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> verify the Ice Bed Temperature Monitoring System is Functional Page 59 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 60 (1 point)

Given the following Unit 1 conditions:

  • A Design Basis Large Break LOCA has occurred combined with a loss of core cooling event
  • Reactor Engineering calculates cladding temperature to be approximately 2400 °F Based on given conditions, the largest contributor to hydrogen buildup in containment is _____(1)_____ .

Per OP/1/A/6450/010 (Containment Hydrogen Control Systems) Technical Support Center (TSC) approval will be required, to place Hydrogen Recombiners in service, if Hydrogen concentration exceeds a MINIMUM of

_____(2)_____ .

Which ONE of the following correctly completes the statements above?

A. 1. Zirc-Water reaction in core region

2. 4%

B. 1. Zirc-Water reaction in core region

2. 6%

C. 1. Dissolved hydrogen in the NC System

2. 4%

D. 1. Dissolved hydrogen in the NC System

2. 6%

Page 60 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 61 (1 point)

Given the following Unit 1 timeline:

1000

  • The Unit has experienced a runback, from 100% power, following a trip of 1A CFPT 1003
  • Steam Dumps have closed
  • Temperature Error meter indicates (+) 1.8° F Entry into the Action Statement of Tech Spec 3.1.6 (Control Bank Insertion Limits) is FIRST required at _____(1)_____ .

In accordance with the conditions provided at 1005, OMP 1-7 (Emergency /

Abnormal Procedure Implementation Guidelines) _____(2)_____ state that control rods should be placed in MANUAL.

Which ONE of the following correctly completes the statements above?

A. 1. 1003

2. does B. 1. 1003
2. does NOT C. 1. 1005
2. does D. 1. 1005
2. does NOT Page 61 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 62 (1 point)

Given the following Unit 1 conditions:

  • The Unit 1 is at 100% RTP

In accordance with AP/23:

A turbine load reduction _____(1)_____ be effective.

As vacuum lowers, the OATC will trip the reactor once it is imminent that vacuum, in any main condenser, will reach a MAXIMUM value of

_____(2)_____.

Which ONE of the following correctly completes the statements above?

A. 1. will

2. 24.3 in Hg B. 1. will
2. 22 in Hg C. 1. will NOT
2. 24.3 in Hg D. 1. will NOT
2. 22 in Hg Page 62 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 63 (1 point)

Concerning area monitors 1EMF-18 and 1EMF-19 (Reactor Coolant Filter A and B):

1EMF-18 and 1EMF-19_____(1)_____ required by Tech Specs, and

_____(2)_____ listed as symptoms for entry into AP/1/A/5500/018 (High Activity in Reactor Coolant).

Which ONE of the following correctly completes the statement above?

A. 1. are

2. are B. 1. are
2. are NOT C. 1. are NOT
2. are D. 1. are NOT
2. are NOT Page 63 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 64 (1 point)

Given the following initial conditions:

  • Units 1 & 2 are at 100% RTP
  • 1A RN pump is in service Subsequently:
  • The following Unit 1 annunciators are lit o 1AD-12 B/2 RN PIT A Screen Hi D/P o 1AD-12 B/1 RN Pump Intake Pit A Level - LO o 1AD-12 E/2 RN Pit A Swap to SNSWP Based on this event:

_____(1)_____ will automatically close.

1B RN Pump _____(2)_____ automatically start.

Which ONE of the following correctly completes the statements above?

A. 1. 1RN-47A (RN Supply X-Over Isol)

2. will B. 1. 1RN-47A (RN Supply X-Over Isol)
2. will NOT C. 1. 1RN-48B (RN Supply X-Over Isol)
2. will D. 1. 1RN-48B (RN Supply X-Over Isol)
2. will NOT Page 64 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 65 (1 point)

Given the following Unit 1 conditions:

  • The Fire Protection (RF) system heat sensitive element located at Unit 1 Main Turbine Bearing #8 has failed open As a result of this malfunction, RF discharge flow to the Main Turbine Bearing
  1. 8 _____(1)_____ initiate.

The purpose of the Main Turbine portion of the Fire Protection system is to engulf turbine bearings with a large quantity of _____(2)_____ .

Which ONE of the following correctly completes the statements above?

A. 1. will

2. water B. 1. will
2. foam extinguishing agent C. 1. will NOT
2. water D. 1. will NOT
2. foam extinguishing agent Page 65 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 66 (1 point)

Given the following conditions:

  • A clarification related to EAL classification needs to be communicated to all licensed SROs via Standing Instruction and has been prepared by a member of the Emergency Planning group In accordance with AD-OP-ALL-0111 (Operations Communications):

This Standing Instruction _____(1)_____ be approved by another member of the Emergency Planning group..

Non-impacted operators (i.e. AOs) _____(2)_____ be exempted from documented review of this Standing Instruction Which ONE of the following correctly completes the statements above?

A. 1. can

2. can B. 1. can NOT
2. can C. 1. can
2. can NOT D. 1. can NOT
2. can NOT Page 66 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 67 (1 point)

Given the following conditions:

  • Unit 1 has suffered a loss of Main Feed Pump runback from 100% RTP o Control rods failed to automatically insert on the runback
  • Unit 2 is currently raising power to 100% RTP following Control Valve Movement Testing o An ILT student is manipulating control rods under the instruction of the OATC In accordance with AD-OP-ALL-0203 (Reactivity Management):

An additional Reactor Operator _____(1)_____ required to peer check the Unit 1 OATC manually operating failed control rods.

An additional Reactor Operator _____(2)_____ required to peer check control rod manipulations performed by the ILT student.

Which ONE of the following correctly completes the statements above?

A. 1. is

2. is B. 1. is
2. is NOT C. 1. is NOT
2. is D. 1. is NOT 2 is NOT Page 67 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 68 (1 point)

Given the following Unit 1 conditions:

  • A Unit startup is in progress in accordance with OP/1/A/6100/001 (Controlling Procedure for Unit Startup)
  • Auxiliary Steam (AS) from Unit 2 is being used for turbine warming
  • NC system pressure is 2235 psig
  • Steam dumps are controlling NC Tavg at 557ºF
  • The crew is preparing to restore AS to a normal alignment by closing 1AS-4, (Main Steam to AS HDR CTRL Bypass)

Operation of 1AS-4 is performed _____(1)_____ the Control Room.

In accordance with AD-OP-ALL-0203, (Reactivity Management), the Unit startup will require a dedicated _____(2)_____ with no concurrent duties.

Which ONE of the following correctly completes the statements above?

A. 1. outside

2. RO AND SRO B. 1. inside
2. RO AND SRO C. 1. outside
2. RO ONLY D. 1. inside
2. RO ONLY Page 68 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 69 (1 point)

Concerning Tech Spec 2.1.1 (Reactor Core SLs):

The peak centerline fuel temperature shall be maintained less than

_____(1)_____ .

This limit _____(2)_____ change over core life.

Which ONE of the following correctly completes the statements above?

A. 1. 2200°F

2. does B. 1. 2200°F
2. does NOT C. 1. 5080°F
2. does D. 1. 5080°F
2. does NOT Page 69 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 70 (1 point)

Given the following Unit 2 conditions:

  • Maintenance is performing a calibration of Pressurizer Pressure Channel 1
  • A technician has requested the Unit 2 BOP delete an OAC alarm per the associated IP procedure In accordance with AD-OP-ALL-1000 (Conduct of Operations):

The deleted OAC alarm _____(1)_____ required to be logged in eSOMS.

An audit of deleted computer alarms is required ____(2)_____ .

Which ONE of the following correctly completes the statements above?

A. 1. is

2. weekly B. 1. is
2. monthly C. 1. is NOT
2. weekly D. 1. is NOT
2. monthly Page 70 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 71 (1 point)

Given the following:

  • A General Emergency has been declared
  • A mission to protect valuable property is required In accordance with AD-EP-ALL-0205 (Emergency Exposure Controls):

The limit associated with this emergency exposure is _____(1)_____ and the worker _____(2)_____ required to be a volunteer.

Which ONE of the following correctly completes the statement above?

A. 1. 5 Rem

2. is B. 1. 5 Rem
2. is NOT C. 1. 10 Rem 2 is D. 1 10 Rem 2 is NOT Page 71 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 72 (1 point)

Given the following Unit 1 conditions:

  • An Operator is performing a valve lineup in the Unit 1 Auxiliary Building
  • While working in the area, the Operator receives a Dose Rate alarm on his Electronic Dosimeter (ED)
  • After a few seconds, the Dose Rate alarm automatically clears
  • The possibility of a Dose Rate alarm was NOT discussed during the RP brief In accordance with PD-RP-ALL-0001 (Radiation Worker Responsibilities):

the Operator _____(1)_____ .

if the Operator receives a Dose alarm, the alarm _____(2)_____ .

Which ONE of the following correctly completes the statements above?

A. 1. must stop work, exit the area, and notify RP immediately

2. will not clear until the ED is reset B. 1. must stop work, exit the area, and notify RP immediately
2. will automatically clear after 10 seconds C. 1. may continue to work unless two additional dose rate alarms are received
2. will not clear until the ED is reset D. 1. may continue to work unless two additional dose rate alarms are received
2. will automatically clear after 10 seconds Page 72 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 73 (1 point)

During an emergency event:

The MINIMUM level of emergency classification that ALWAYS requires activation of the OSC, TSC, and EOF is a _____(1)_____.

The MINIMUM level of emergency classification that ALWAYS requires an evacuation of all non-essential personnel from the site is a _____(2)_____.

Which ONE of the following correctly completes the statements above?

A. 1. Alert

2. Site Area Emergency B. 1. Alert
2. General Emergency C. 1. Unusual Event
2. Site Area Emergency D. 1. Unusual Event
2. General Emergency Page 73 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 74 (1 point)

Of the four (4) nuclear instruments listed in F-0, (Critical Safety Function Status Trees),

for assessing the Subcriticality safety function, which ONE is a Post-Accident Monitoring (PAM) instrument required by LCO 3.3.3, PAM (Post-Accident Monitoring)

Instrumentation?

A. Source Range B. Intermediate Range C. Power Range D. Wide Range Page 74 of 75

Catawba Nuclear Station ILT 21 CNS RO NRC Examination Question: 75 (1 point)

Given the following Unit 1 initial conditions:

  • Unit is cooling down for a refueling outage
  • NC Thots are at 365ºF
  • NC pressure is 400 psig
  • All CLAs have been isolated Subsequently:
  • NC pressure and PZR level are steadily lowering
  • Containment pressure is rising
  • The crew enters AP/1/A/5500/027, (Shutdown LOCA) and maximizes charging and isolates letdown
  • Pressurizer level and pressure continue to lower In accordance with AP/27, the cooldown rate is required to be LESS THAN

_____(1)_____ in one hour.

In accordance with OP/1/A/6200/004, (Residual Heat Removal System), ND can be placed in RHR Mode once NC Thots are less than a MAXIMUM temperature of_____(2)_____ .

Which ONE of the following correctly completes the statements above?

A. 1. 100ºF

2. 350ºF B. 1. 80ºF
2. 350ºF C. 1. 100ºF
2. 300ºF D. 1. 80ºF
2. 300ºF Page 75 of 75

WRITTEN EXAM REFERENCE PACKAGE CONTENTS EXAM ID: CNS ILT 21 NRC Exam (RO) 1 CNS ROD Book Section 2.6 2 CNS Unit 1 Data Book Figure 57 (Reactor Coolant Saturation Curve, Wide Range) 3 Steam Tables 4 Mollier Diagram

UNIT ONE Source: CNEI-0400-361 Prepared by: MW Hawes REACTOR OPERATING DATA Revision Number: 870 SECTION 2.6 Date: 5/25/20 MINIMUM NC TEMPERATURE FOR 1.3% SHUTDOWN MARGIN FOLLOWING REACTOR TRIP

Unit 1 Data Book Source: OAC Reactor Coolant Saturation Calculations 2500 2400 2300 2200 2100 2000 1900 1800 1700 1600 NC System Pressure (psig) 1500 Subcooled Region 1400 1300 1200 1100 1000 900 800 700 600 500 Superheated Region 400 300 200 100 0

200 250 300 350 400 450 500 550 600 650 700 NC System Temperature (Deg F)

Rev. 2, 4/5/2002 Figure 57 - Reactor Coolant Saturation Curve, Wide Range Page 61

Examination KEY ILT 21 CNS RO NRC Examination Q A Q A Q A Q A 1 D 26 A 51 B 2 C 27 D 52 D 3 B 28 B 53 A 4 D 29 B 54 B 5 A 30 C 55 B 6 C 31 D 56 D 7 A 32 C 57 B 8 B 33 D 58 D 9 D 34 B 59 B 10 A 35 D 60 B 11 D 36 A 61 C 12 B 37 B 62 D 13 A 38 C 63 C 14 A 39 B 64 C 15 A 40 C 65 C 16 D 41 A 66 B 17 A 42 B 67 C 18 D 43 C 68 A 19 B 44 D 69 C 20 B 45 D 70 C 21 A 46 C 71 D 22 D 47 D 72 A 23 B 48 C 73 A 24 C 49 D 74 D 25 C 50 A 75 A Printed 9/29/2021 1:58:40 PM Page 1 of 1

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