Preferred AC and 125VDC

The plant is at full power with Station Battery Chargers #3 and #4 in service. The #2 DC Bus Tie Breaker 72-20 fails open. Which answer below describes the condition of Preferred AC Bus loads?

• Inverter #2 is powered by Battery Charger #4, Inverter #4 is powered by Station Battery #2

• Inverter #4 is powered by Battery Charger #4, Inverter #2 is powered by Station Battery #2

• Both Inverter #2 and Inverter #4 are powered by Battery Charger #4

• Both Inverter #2 and Inverter #4 are powered by Station Battery #2

In the event of a power interruption, the Y-50 ABT will switch from its normal power supply to the backup power supply in less than ____, and when powered is restored to its normal power supply it will switch back in approximately _____

• 5 seconds

  5 minutes

• 1 second

  5 seconds

• 5 seconds

  1 minute

• 1 second

  5 minutes

Battery Chargers #1 and #2 are in service with the plant at full power. DC Bus #1 Tie Breaker 72-10 fails open. Shortly afterward and with 72-10 still open, a Loss of Offsite Power (LOOP) occurs. Assuming all equipment functions as expected, describe the effect on Buses 1C and 1D.

• EDG 1-1 starts and loads Bus 1C. Bus 1D is deenergized.

• EDG 1-2 starts and loads Bus 1D. Bus 1C is deenergized.

• EDG 1-1 starts and loads Bus 1C. EDG 1-2 starts and loads Bus 1D.

• Bus 1C is deenergized. Bus 1D is deenergized.

What is the effect on the Emergency Diesel Generator System as a result of a loss of DC Bus 21A?

• The ability of the 1-1 EDG to automatically start and sequence loads onto Bus 1C would be lost

• All diesel

  protection and control for the 1-1 EDG would be lost

• The ability of the 1-2 EDG to automatically start and sequence loads onto Bus 1D would be lost

• All diesel

  protection and control for the 1-2 EDG would be lost

(SRO ONLY)

Electrical Maintenance performs a surveillance on Station Battery #1. They report the following:

One battery cell @2.06V, all remaining cells @2.14V

Average specific gravity of 1.203 for all connected cells

Which Tech Spec 3.8.6 Action(s) is/are applicable?

(You may use ONLY the first two pages of TS 3.8.6 as a reference. You may NOT use Table 3.8.6-1)

• 3.8.6.A only

• 3.8.6.B only

• 3.8.6.A and 3.8.6.B

• No Tech Spec actions apply

What are the power supplies for P-18A and P-18B, Fuel Oil Transfer Pumps?

• P-18A: MCC-1

  P-18B: MCC-8

• P-18A: MCC-8

  P-18B: MCC-1

• P-18A: MCC-2

  P-18B: MCC-1

• P-18A: MCC-1

  P-18B: MCC-2

An NPO returns from performing shiftly rounds and reports the following parameters for the 1-1 EDG and for the Fuel Oil Transfer System:

Jacket Water Temperature: 190°F

Lube Oil Temperature: 195°F

Air Start Tank Pressure: 220 psig

P-18B, Fuel Oil Transfer Pump, is NOT aligned for automatic operation

What are the Tech Spec implications of these parameters? You may use T.S 3.8.1 and 3.8.3 as references.

• Tech Spec Required Action 3.8.1.B is not met

  Tech Spec Required Action 3.8.3.D is not met

• Tech Spec Required Action 3.8.1.B is not met.

• Tech Spec Required Action 3.8.3.D is not met

• No Tech Spec Required Actions not met

The plant is at full power. An earthquake causes a Loss of Coolant Accident (LOCA) and subsequently the plant is tripped. After a few minutes, a Safety Injection Signal (SIS) is received. After a few more minutes, a Loss of Offsite Power (LOOP) occurs and Breaker 152-213, EDG 1-2 Output Breaker, trips on overcurrent. What is the status of the 1C and 1D Buses after the LOOP?

• Bus 1C has been energized from EDG 1-1 using the NSD sequencer

  Bus 1D has been energized from EDG 1-2 using the NSD sequencer.

• Bus 1C has been energized from EDG 1-1 using the DBA sequencer

  Bus 1D has been energized from EDG 1-2 using the DBA sequencer.

• Bus 1C has been energized from EDG 1-1 using the NSD sequencer

  Bus 1D is deenergized

• Bus 1C has been energized from EDG 1-1 using the DBA sequencer

  Bus 1D is deenergized

The 1-1 and 1-2 EDGs are designed for a MAXIMUM RATING of ____ and to start and be ready for loading their respective buses in less than ____

• 2500 kW

  10 seconds

• 2750 kW

  10 seconds

• 2500 kW

  15 seconds

• 2750 kW

  15 seconds

(SRO ONLY)

The plant is in MODE 1. At 0700 on Monday, a fault occurred on Inverter #3 and Y-30 was transferred to the Bypass Regulator. At 1100 on Monday, Inverter #3 was repaired and Y-30 was still powered by the Bypass Regulator. If no further action is taken, which of the following statements represents the correct Tech Spec Required Actions? You may use Tech Specs 3.8.7 and 3.8.9 as references.

• Be in MODE 3 by 1300 on Tuesday and be in MODE 5 by 1900 on Wednesday

• Be in MODE 3 by 2100 on Monday and be in MODE 5 by 0300 on Wednesday

• Be in MODE 3 by 0100 on Tuesday and be in MODE 5 by 0700 on Wednesday

• No Tech Spec actions are applicable