Week 12 Flashcards
• Unit 1 is operating at rated power.
• AFB-P01 has been out of service for 4 hours.
• NBN-X03 trips on sudden pressure.
• Diesel Generator A fails to start.
• All other equipment is operable.
Based on these conditions, the operating crew is expected to:
A. immediately initiate action to restore at least one AFW train to operable status.
B. restore at least one AFW train to operable status within 1 hour or be in at least Mode 3 within the next 6 hours.
C. restore either AFA-P01 or AFB-P01 to operable status within 1 hour or be in at least Mode 3 within the next 6 hours.
D. immediately initiate action to restore at least one AFW train to operable status or be in at least Mode 3 within the next 6 hours.
A. immediately initiate action to restore at least one AFW train to operable status.
• The plant is operating at 100% power.
• COLSS is out of service.
• Linear Heat Rate is 14 kW/ft.
• 15 minutes later, Linear Heat Rate is 14.5 kW/ft.
Which one of the following actions should be performed to comply with Technical Specifications?
A. Within 15 minutes, initiate corrective action to restore Linear Heat Rate to within the LCO limits within 1 hour.
B. Within 30 minutes, restore Linear Heat Rate to within the LCO limits.
C. Thermal power must be reduced to less than or equal to 50% within one hour.
D. Within 1 hour, commence a shutdown to place the plant in MODE 3 over the next 6 hours.
A. Within 15 minutes, initiate corrective action to restore Linear Heat Rate to within the LCO limits within 1 hour.
- Unit 1 is operating at 100% power.
- COLSS is declared inoperable on the CMC and PC due to computer hardware failures.
- The operating crew performs 72ST-9RX03, DNBR/LHR/AZTILT/ASI With COLSS Out Of Service.
- The value for DNBR is not within the acceptable region of the curve.
Determine what licensing condition you are in, required action, and completion time.
LCO 3.2.4 condition B
Determine the trend in DNBR once per 15 minutes.
AND with an adverse trend, restore DNBR to within limit within 1 hour OR with no adverse trend, restore DNBR to within limit within 4 hours.
• The plant is at 100% power.
• A CEA misalignment has caused Azimuthal Power Tilt to exceed the limit specified in the Core Operating Limits Report (COLR).
• COLSS is in service.
Which one of the following states the actions required by Tech. Specs?
A. Reduce the VOPT setpoints to < 35% within 16 hours.
B. Verify that COLSS is detecting the CEA alignment within 2 hours.
C. Restore measured Tq to less than the Tq allowance used in the CPC’s within 16 hours.
D. Reduce thermal power to < 50% RTP within 4 hours, and reduce VOPT setpoints to < 55% RTP within 16 hours.
D. Reduce thermal power to < 50% RTP within 4 hours, and reduce VOPT setpoints to < 55% RTP within 16 hours.
- The plant is at 75% power.
- COLSS is in service.
Subsequently
• Reg Group 3 CEA 45 slips 75 inches into the core.
• It is determined that the CEA is trippable.
• Azimuthal Power Tilt is currently 5.1%
Which one of the following states the actions required by Tech. Specs?
Reduce power to < 60% within one (1) hour and…
A. all TS requirements have been met.
B. raise the Tq allowance in the CPCs to 4% within 2 hours.
C. the requirements of LCO 3.2.3 are met provided Tq is maintained less than or equal to 5%.
D. continue reducing power to < 50% within 4 hours, and reduce VOPT setpoints to < 55% within 16 hours.
D. continue reducing power to < 50% within 4 hours, and reduce VOPT setpoints to < 55% within 16 hours.
• Unit 1 is in mode 1.
• A Channel Functional Test on CPC “A” determined that a DNBR setpoint of 1.30 exists in the
CPC.
Determine what licensing condition you are in, and the required action.
LCO 3.3.1 Condition “A” One or more Functions with one automatic RPS trip channel
inoperable.
Place channel in bypass or trip within 1 hour AND Restore channel to OPERABLE status.
Prior to entering MODE 2 following next MODE 5 entry.
- Unit 1 is in mode 1.
- One Control Element Assembly Calculator (CEAC) in Core Protection Calculator “A” has been declared INOPERABLE.
Determine what licensing condition you are in, and the required action.
LCO 3.3.3 Control Element Assembly Calculators (CEACs) condition “A”.
Declare the affected CPC channel “A” inoperable immediately OR Perform SR 3.1.5.1 (which is to Verify the indicated position of each full strength and part strength CEA is within 6.6 inches of all other CEAs in its group.) Once per 4 hours AND Restore the CEAC to OPERABLE status within 7 days.
• Unit 1 is in Mode 4 performing a heatup to Mode 3.
• The output from all 8 sensors on the Channel B RVLMS probe have failed.
• I&C suspects the cabling from the probe assembly.
Based on these conditions, apply Technical Specifications LCO 3.3.10 and assess the operability
impact regarding entrance into Mode 3.
A. Mode 3 entry is permitted. Enter LCO 3.3.10, Conditions A and E.
B. Mode 3 entry is permitted. Enter LCO 3.3.10, Conditions A, Actions A.1.
C. Mode 3 entry is not permitted. Because two Trains of RVLMS are required to be Operable in Mode 3.
D. Mode 3 entry is not permitted. Because entry into LCO 3.3.10, Conditions A, Actions A.1 is required.
C. Mode 3 entry is not permitted. Because two Trains of RVLMS are required to be Operable in Mode 3.
• Unit 1 is operating at rated power.
• Area 3 reports a leak on the “A” HPSI pump room Essential ACU, HAA-Z01.
• Chill Water (EC) is isolated to HAA-Z01.
• EC “A” surge tank remained within the normal operating band.
HPSI Pump “A” is (1) , Essential Chilled Water (EC) System “A” is (2) .
A. (1) operable (2) operable
B. (1) operable (2) inoperable
C. (1) inoperable (2) operable
D. (1) inoperable (2) inoperable
C. (1) inoperable (2) operable
- Power accession to 100% in progress
- Power is currently stabilized at 18% while performing Mode Change Checklist
- Reactor Operator informs you that the CPC power indicates 3% less than Calorimetric power
Assuming no corrective action is taken, is power accession above 20% permissible? Give a short
explanation of your answer.
Yes, note 1 of SR 3.3.1.4 allows this exception
This note states “Not required to be performed until 12 hours after THERMAL POWER ≥20% RTP.”
If the Train essential cooling water pump becomes INOPERABLE, what other Train equipment
becomes INOPERABLE?
A. Essential chilled water and ECCS Train.
B. Diesel generator and spray pond pump.
C. Spray pond pump and essential chilled water.
D. ECCS Train pump and diesel generator.
A. Essential chilled water and ECCS Train.
• The Train ‘A Essential Chiller is declared inoperable.
• The crew begins to perform the required actions of 3.7.10, Condition A.
Assuming 3.0.6 is implemented, LPSI “A” is considered…
A. operable since EC provides minimal support for this safety function.
B. operable as long as the required actions for EC are being implemented.
C. inoperable and the conditions and required actions of LCO 3.5.3 must be entered.
D. inoperable, however, the conditions and required actions of LCO 3.5.3 are not required to be entered.
D. inoperable, however, the conditions and required actions of LCO 3.5.3 are not required to be entered.
