Class 125V DC (PK) Flashcards
Unit 2 is operating at rated power. The A D/G output breaker is closed with the D/G carrying 5000 KW of load paralleled to offsite power. A loss of PKA-M41 occurs due to a bus fault. Which one of the following describes the impact, if any, this has on the D/G?
A. The D/G trips but its output breaker remains closed, causing the diesel to motorize.
B. No impact, since PNA-D25 remains energized.
C. The D/G trips, its output breaker remains closed and PBA-S03 de-energizes.
D. The D/G continues to run at 5000 KW, however output breaker control has been lost.
Answer: A
Which one of the following describes the operation of AFN-P01 following a loss of PKA-D21 in which PKA-D21 can NOT be re-energized? Control power must be shifted to the ‘A’ battery…
A. output to restore remote operation of both the breaker and suction valves.
B. output to restore remote operation of the breaker.
C. charger output to restore remote operation of the AFN-P01 breaker.
D. charger output to restore remote operation of both the breaker and suction valves.
Answer: C
The unit is operating at rated power. A loss of PNA-D25 occurs. What impact (if any) will this loss have on BOP ESFAS?
A. Nothing will actuate or become non-functional solely due to the power loss.
B. Train ‘A’ CREFAS, CPIAS and FBEVAS actuations ONLY.
C. Train ‘A’ BOP ESFAS will become de-energized and not function.
D. Train ‘A’ and ‘B’ CPIAS, CREFAS, and FBEVAS will actuate.
Answer: D
Considering the upgraded CPC System (Advant), what information does CEAC 1A supply to the CPC “A”?
A. 22 target CEA positions and Penalty Factors based on subgroup deviations within a group.
B. 22 target CEA positions and Penalty Factors based on CEA misalignment within a subgroup.
C. 89 target CEA positions and Penalty Factors based on subgroup deviations within a group.
D. 89 target CEA positions and Penalty Factors based on CEA misalignment within a subgroup.
Answer: B
Unit 1 is operating in Mode 1. A failure of one required Class 1E Battery Charger occurs. Technical Specifications require the operating crew to:
A. take no action as long as the DC electrical power subsystem is operable.
B. align the Battery Charger within 2 hour.
C. immediately declare the battery inoperable.
D. verify that the battery meets category A limits within 1 hour.
Answer: D
The plant is in Mode 5, when 1 channel of Boron Dilution Alarm system (BDAS) becomes INOPERABLE, the operator must:
A. immediately determine RCS Boron concentration, no actions are required by Technical Specifications or 40ST-9ZZ19 (Mode 5 & 6 Shiftly Surveillance Logs).
B. immediately determine RCS Boron concentration and REFER to LCO 3.3.12 Condition B.
C. immediately determine RCS Boron concentration and REFER to LCO 3.3.12 Condition A.
D. determine that no actions are required by Technical Specifications or 40ST-9ZZ19.
Answer: C
Loss of PKD-M44 How many ADV’s are available from the control room?
A. 2
B. 0
C. 1
D. 4
Answer: A
In the upgraded CPCs (Advant) which one of the following describes how the “A” CPC determines where its “Target CEAs” are located? CEA position information is provided by:
A. RSPT-2 to CPP-1A to CEAC-2A to CPC A
B. RSPT-1 to CPP-1A to CEAC-2A to CPC A
C. RSPT-2 to CPP-1A to CEAC-1A to CPC A
D. RSPT-1 to CPP-1A to CEAC-1A to CPC A
Answer: D
In the upgraded CPC System (Advant), the CEAC penalty factors are generated based on…
A. Partstrength insertion limits.
B. CEA misalignment within a subgroup.
C. Reg Groups out of sequence.
D. Subgroup deviations within a group.
Answer: B
Since rod position information is fed to the CPCs, why are the CEACs still necessary? Only the…
A. CEACs are capable of detecting smaller deviations to give quicker protection.
B. CPCs are used for protection, while the CEACs are used to monitor LCOs.
C. CEACs are capable of detecting a deviation between CEAs in a subgroup.
D. CPCs have demanded position information (pulse counters), but CEACs have actual position information (RSPTs).
Answer: C
Unit 2 operating at 100% full power. NBN-X04, ESF Transformer, trips on sudden pressure. Emergency diesel generator “B” starts and loads. PKB-M42, Class 1E 125 VDC bus, trips on overcurrent. WHICH ONE of the following identifies the effect(s) on emergency diesel generator “B” due to the loss of PKB-M42?
A. Trips and the output breaker remains closed.
B. Trips and the output breaker opens.
C. Continues to run and the output breaker opens.
D. Continues to run and output breaker remains closed.
Answer: A
