Week 9-10

Question 1

Why is it important for the operating crew to energize the switchyard loads from the Gas Turbine Generators during a Loss of Offsite Power (LOOP)?

A. Restores control power NAN-S05 and NAN-S06.

B. Restores the normal power supply to the security lighting system.

C. Ensures that switchyard breaker operation will be possible.

D. Ensures that a minimum load is placed on the GTGs allowing the generators to burn their fuel completely.

Answer 1

C. Ensures that switchyard breaker operation will be possible.

Question 2

The Blackout ORP directs the crew to place all charging pumps in PTL to…

A. provide for controlled restoration of RCP seal injection.

B. prevent inadvertent dilution on restoration of injection flow.

C. ensure that pump suction source is aligned prior to restart.

D. ensure pumps are not immediately anti-pumped on restoration of power.

Answer 2

A. provide for controlled restoration of RCP seal injection.

Question 3

During a Loss of Offsite Power (LOOP), the operating crews are directed to startup a Gas Turbine Generator (GTG) within 1 hour and energize NAN-S07. Assuming that each unit is being supplied by their own diesel generators, is this step still necessary, and why or why not?

A. No, this step can be omitted if at least one DG is operating on each unit.

B. Yes, this step ensures that the GTG batteries and HVAC equipment have power.

C. Yes, this step is necessary to augment the DGs, enabling one unit to startup if necessary.

D. No, this is only performed if there is thunderstorm activity in the “vicinity.”

Answer 3

B. Yes, this step ensures that the GTG batteries and HVAC equipment have power.

Question 4

• The plant is operating at 100% power
• The normal supply breaker to PBA-S03 trips open.
• The “A” Emergency Diesel starts but does not supply power to PBA-S03.
• All other electric plant buses are energized and normal.

Which one of the following events has occurred?

A. Blackout (BO)

B. Loss of Offsite Power (LOOP)

C. Loss of Forced Circulation (LOFC)

D. Loss of Power (LOP)

Answer 4

D. Loss of Power (LOP)

Question 5

Which one of the following most correctly describes plant conditions if the switchyard grid has de-energized, and remains so, and both diesel generators have started and are running and powering their respective 4.16kV AC class busses?

A. Blackout (BO)

B. Loss of Offsite Power (LOOP)

C. Loss of Forced Circulation (LOFC)

D. Loss of Power (LOP)

Answer 5

B. Loss of Offsite Power (LOOP)

Question 6

During the performance of an EOP the CRS may proceed with the next step…

A. only when the current step has been completed.

B. only with SM concurrence if the current step is not completed.

C. only if the current step will be completed before subsequently assigned steps.

D. when there is reasonable assurance that the current step is proceeding satisfactorily.

Answer 6

D. when there is reasonable assurance that the current step is proceeding satisfactorily.

Question 7

Which of the following is the MINIMUM power source necessary to maintain the unit in a safe condition AND energize switchyard loads for up to 16 hours following a Blackout?

A. Two Gas Turbine Generators.

B. One Emergency Diesel Generator.

C. One Off-Site Power Source.

D. One Gas Turbine Generator.

Answer 7

D. One Gas Turbine Generator.

Question 8

Based on plant conditions, additional equipment operation may be required to mitigate a blackout event (above and beyond coping loads). Which of the following is an acceptable combination of loads assuming a single GTG in operation on PBA-S03?

A. AFB-P01 and CHE-P01.

B. AFN-P01 and HPSI A.

C. AFN-P01 and CHE-P01.

D. AFA-P01 and LPSI A.

Answer 8

C. AFN-P01 and CHE-P01.

Question 9

During a LOOP, the operating crew has just completed the appropriate maintenance of vital auxiliaries success paths for power restoration. The status of electrical buses energized are as follows:

• PBB-S04 is energized from EDG B
• PNA-D25 is energized from Inverter PNA-N11
• PKA-M41 is energized from it’s battery
• PKC-M43 is energized from it’s battery
• All other buses are de-energized

The maintenance of vital auxiliaries safety function is:

A. satisfied

B. not satisfied because all energized buses are not in the same train.

C. not satisfied because PNC-D27 is not energized.

D. not satisfied because both PKA-M41 and PKC-M43 do not have their associated chargers in service.

Answer 9

B. not satisfied because all energized buses are not in the same train.

Question 10

The Blackout coping strategy assumes that PBA-S03 will be energized from a GTG within:

A. 30 Minutes.

B. 60 Minutes.

C. 90 Minutes.

D. 120 Minutes.

Answer 10

B. 60 Minutes.

Question 11

• The Unit has been in a blackout condition for 2 hours.
• QSPDS indicates 32 degrees superheat and has been stable for the last 15 minutes.
• CET temperatures and RCS pressure have also been stable for the last 15 minutes.

What is the condition of RCS and core heat removal?

A. All natural circulation has been lost, core uncovery has occurred.

B. Single phase natural circulation is maintaining heat removal.

C. All natural circulation has been lost, but the core still remains covered.

D. Two phase natural circulation is maintaining heat removal.

Answer 11

D. Two phase natural circulation is maintaining heat removal.

Question 12

Which of the following describes how SDM is monitored during a blackout?

A. At 25°F Tc intervals, SDM is calculated using current Tc and boron concentration at the time of the event.

B. At 50°F Tc intervals, SDM is calculated using Tc minus 50°F and boron concentration at the time of the event.

C. At 50°F Tc intervals, SDM is calculated using current Tc and boron concentration at the time of the event minus 100 ppm.

D. At 25° F Tc intervals, SDM is calculated using Tc minus 25°F and boron concentration at the time of the event minus 100 ppm.

Answer 12

B. At 50°F Tc intervals, SDM is calculated using Tc minus 50°F and boron concentration at the time of the event.

Question 13

Given the following conditions: Loss of offsite power. Both DGs fail to start. Which of the following describes how the safety analyses assume the reactivity control safety function is maintained?

A. Maintain the plant in Hot Standby.

B. Plant cooldown is limited to 75 degrees/hour.

C. Within 1 hour, RCS pressure is reduced below SIT pressure.

D. After verification of all CEAs inserted; cooldown to SDC entry conditions.

Answer 13

A. Maintain the plant in Hot Standby.

Question 14

• Emergency boration is required
• RWT is below 82% level
• PC Cleanup is recirculating the RWT

Which of the following flow paths is NOT operable?

A. CHE-HV-536

B. CHB-V327

C. PCN-V215, spent fuel pool supply

D. CHN-HV-532

Answer 14

A. CHE-HV-536

Question 15

WHICH ONE of the following requires that boration be established per 40AO-9ZZ01, “EMERGENCY BORATION”?

A. A plant cooldown has been directed by the CRS.

B. Entry into any Emergency Operating Procedure.

C. Shutdown Margin has been lost.

D. Entry into the Lower Mode Functional Recovery Procedure.

Answer 15

C. Shutdown Margin has been lost.

Question 16

What is shutdown margin?

A. The amount of positive reactivity associated with boron and temperature

B. The amount of negative reactivity associated with Xenon and temperature

C. The amount of positive reactivity by which the reactor can or will be shutdown

D. The amount of negative reactivity by which the reactor can or will be shutdown

Answer 16

D. The amount of negative reactivity by which the reactor can or will be shutdown

Question 17

Plant conditions are such that shutdown margin is less than required. Regarding the use of gravity feed from the Safety Injection System through CH-V327 to the charging pumps, which one of the following statements is correct?

A. In order to use this method, manual valve operations must be performed outside the control room.

B. When the RWT level reaches 40%, a charging pump low suction trip will occur.

C. The RWT level must be above 73% if this flow path is used to ensure charging pump suction.

D. In order to satisfy Technical Specification requirements, the boration flow rate must be 50 gpm.

Answer 17

A. In order to use this method, manual valve operations must be performed outside the control room.

Question 18

Given the following plant conditions:

• A reactor trip has occurred from 100% power.
• Plant conditions require IMMEDIATE boration.
• RCS pressure is 2230 psia.
• RWT level is 65%.

Which one (1) of the following methods is available for immediate boration given the above conditions? Gravity feed through…

A. CH-V327 to charging pumps.

B. CH-HV-536 to charging pumps.

C. CH-V164 via CH-UV-514 to charging pumps.

D. HPSI pumps and high pressure injection valves.

Answer 18

A. CH-V327 to charging pumps.

Question 19

Which of the following statements correctly identifies when a HPSI pump is to be used for Emergency Boration per 40AO-9ZZ01, “Emergency Boration”?

A. Anytime a SIAS/CIAS occurs.

B. Anytime RCS pressure is less than HPSI shutoff head.

C. Only if Charging pumps are unavailable.

D. Only if Reactor Coolant System Tcold is less than 350 degrees F.

Answer 19

C. Only if Charging pumps are unavailable.

Question 20

When using the Spent Fuel Pool (SFP) as a source for emergency boration, why must CHN-HV-532 be closed?

A. The SFP boron concentration is higher than the RWT.

B. Three charging pumps cannot run on the SFP with the valve open.

C. A gravity flow path would be established between the SFP and RWT.

D. PC Clean-up must be isolated if the valve is left open.

Answer 20

C. A gravity flow path would be established between the SFP and RWT.

Question 21

An Emergency Boration using a HPSI pump is in progress.

What is the flowrate required for the HPSI pump if the emergency boration must continue for 2 hours?

A. 75 gpm

B. 85 gpm

C. 185 gpm

D. 225 gpm

Answer 21

D. 225 gpm

Question 22

• Unit 1 is operating at rated power at 200 EFPD.
• A condenser tube rupture occurs.
• The four available condensate demineralizers have been placed in service.
• CDN-PDV-195 is still open.
• SG Sodium, based on the inline monitor, indicates 800 ppb and rising rapidly.

Based on these conditions, the operations crew should:

A. initiate a manual RPCB (LOFP).

B. conduct a controlled downpower.

C. take manual control of the controller in order to close CDN-PDV-195.

D. trip the reactor and enter standard post trip actions.

Answer 22

D. trip the reactor and enter standard post trip actions.

Question 23

• Unit 1 is at 100% power, 225 EFPD.
• The crew has entered 40AO-9ZZ10, Condenser Tube Rupture, due to a confirmed leak in the 1B Hotwell.
• The CRS has determined that a normal downpower is the appropriate action.

In accordance with 40AO-9ZZ10, what would be the correct sequence of events that would occur for the affected Circ Water train?

A. close CWN-HV-11, stop CWN-P01C when power <60%, stop CWN-P01D when power <40%, close CWN-HV-9, open CWN-HV-7.

B. stop CWN-P01C & P01D when power <40%, close CWN-HV-11, close CWN-HV-9, open CWN-HV-8.

C. stop CWN-P01C when power <60%, close CWN-HV-11, stop CWN-P01D when power <40%, close CWN-HV-9, open CWN-HV-8.

D. close CWN-HV-11, stop CWN-P01C when power <60%, stop CWN-P01D when power <40%, close CWN-HV-10, open CWN-HV-6.

Answer 23

A. close CWN-HV-11, stop CWN-P01C when power <60%, stop CWN-P01D when power <40%, close CWN-HV-9, open CWN-HV-7.

Question 24

• Unit 2 is at 85% power with both Circulating Water (CW) trains in service.
• The Reactor can be stabilized at 40%.
• Chemistry reports that Steam Generator sodium (Na) and chloride (Cl), although not at their Rx trip limits, will more than likely reach the limit within 40 minutes.

Based on this report, 40AO-9ZZ10 (Condenser Tube Rupture) gives the following guidance…

A. transition to a rapid shutdown (40OP-9ZZ05).

B. consider initiating a manual RPCB (LOFP).

C. manually trip a main feed pump and verify proper RPCB actuation.

D. trip the reactor and implement SPTAs.

Answer 24

B. consider initiating a manual RPCB (LOFP).

Question 25

With a condenser tube rupture in progress, how is the water level in the water boxes measured after the appropriate train is isolated for draining?

A. Use the installed delta-P gauges on the outlet of condenser.

B. Use existing level indicators.

C. Install a tygon tubing as a level indicator.

D. Use a standard 15 ft. calibrated sounding rod.

Answer 25

C. Install a tygon tubing as a level indicator.

Question 26

The crew has entered 40AO-9ZZ10, Condenser Tube Rupture. Which of the following is the correct relationship between circulating water trains and condenser hotwell halves?

A. “A” Train (Loop AB) circulating water flows thru hotwells 2A, 2B, 2C.

B. “A” Train (Loop AB) circulating water flows thru hotwells 1A, 1B, 1C.

C. “B” Train (Loop CD ) circulating water flows thru hotwells 1B, 1C, 1D.

D. “B” Train (Loop CD ) circulating water flows thru hotwells 2A, 2B, 2C.

Answer 26

A. “A” Train (Loop AB) circulating water flows thru hotwells 2A, 2B, 2C.

Question 27

A condenser tube rupture exists in Train “A” of the main condenser. The control room has directed an auxiliary operator to close the inlet isolation valve for Drawoff to the CST. This action by the auxiliary operator will…

A. slow the rate at which condenser hotwell levels are increasing.

B. isolate the make-up function from the condensate storage tank to the condenser hotwells.

C. prevent condensate pump LO-LO level trips after the circ water overboard valves are opened.

D. prevent contamination of the condensate storage tank by isolating hotwell draw off.

Answer 27

D. prevent contamination of the condensate storage tank by isolating hotwell draw off.