Week 12 Flashcards
Upon evacuating the control room due to a fire, operators proceed to the remote shutdown panel (RSP). Which one of the following parameters is reliably measured at this panel?
A. RCS Tavg.
B. RCS Loop 1 Thot.
C. Source Range Nuclear Instrumentation.
D. SG #1 pressure.
D. SG #1 pressure.
Which of the following must be completed before exiting the control room if a fire forces evacuation:
1) Reactor trip
2) MSIS initiation
3) AFAS initiation
4) SIAS/CIAS initiation
A. 1 only
B. 1 and 2 only
C. 1, 2, and 3 only
D. 1, 2, 3 and 4
B. 1 and 2 only
During a Control Room Fire event, which one of the following indicates the components that will be used to facilitate heat removal from the Reactor Coolant System?
A. ADVs and Aux Feed Pump “A”.
B. SBCS and Aux Feed Pump “A”.
C. ADVs and Aux Feed Pump “B”.
D. SBCS and Aux Feed Pump “N”.
C. ADVs and Aux Feed Pump “B”.
Following a Control Room evacuation due to a fire, operators prepare to perform a Natural Circulation cooldown from remote locations. Which one of the following statements is correct with regards to why certain instrumentation at the RSP should be considered reliable for plant control during a Control Room fire?
A. Only the “A” train instruments that deal with Pressurizer Level and pressure, RCS temperature, and Steam Generator level and pressure should be used because these instruments have LOCAL/REMOTE disconnects in their power supplies.
B. Only the “A” train instruments that deal with Pressurizer Level and pressure, RCS temperature, and Steam Generator level and pressure should be used because these instruments have isolators in their circuits.
C. Only the “B” train instruments that deal with Pressurizer level and pressure, RCS temperature, and Steam Generator level and pressure should be used because these instruments have isolators in their circuits.
D. Only the “B” train instruments that deal with Pressurizer Level and pressure, RCS temperature, and Steam Generator level and pressure should be used because these instruments have LOCAL/REMOTE disconnects in their power supplies
C. Only the “B” train instruments that deal with Pressurizer level and pressure, RCS temperature, and Steam Generator level and pressure should be used because these instruments have isolators in their circuits.
- AFA-P01 was tagged out under a permit for maintenance (including its feed valves).
- The control room has been evacuated due to a fire.
- When you arrive at the RSP, you complete appendix A of 40AO-9ZZ19.
- Seconds later, both AFAS 1 & AFAS 2 actuate.
The CRS directs you to establish and maintain 600 gpm to each Steam Generator. In order to accomplish this, you will need to perform which of the following:
A. over-ride and throttle closed aux feed valves AFB-HV30 & 31.
B. over-ride and open all four aux feed valves (AFB-HV30 & 31; AFB-UV34 & 35).
C. throttle closed aux feed valves AFB-HV30 & 31.
D. open all four of the aux feed valves (AFB-HV30 & 31; AFB-UV34 & 35).
D. open all four of the aux feed valves (AFB-HV30 & 31; AFB-UV34 & 35).
Design features prevent Spent Fuel Pool Level from inadvertently draining down to less than:
A. 130 ft. 2 in.
B. 130 ft. 6 in.
C. 131 ft. 2in.
D. 131 ft. 10 in.
A. 130 ft. 2 in.
- Mode 6.
- Refueling operations in progress.
- The refueling machine is moving to retrieve an irradiated fuel assembly in the upender.
- The CRS notifies the LSRO that there is a rapidly lowering fuel pool level and has implemented the LMEOP.
- The CRS directs the LSRO to place the fuel in a safe condition, and close PCN-V118 Fuel Transfer Tube Isolation Valve.
Which of the following describes the required actions for the proper safe location of the fuel and location of the upender/carriage?
The LSRO takes action to place the:
A. Fuel in the upender and retain the upender vertical. Fuel Carriage either on the Fuel poolside or Containment.
B. Fuel in the reactor vessel and retain the fuel carriage in containment.
C. Fuel in the intermediate storage rack and send the fuel carriage to the Fuel Building.
D. Fuel grappled at the uplimit on the RFM and lower the upender horizontal.
B. Fuel in the reactor vessel and retain the fuel carriage in containment.
Given that Unit 1 is refueling with containment closed and the fuel transfer canal in use, which of the following could cause Refueling Pool level to lower?
A. A Fuel Building supply fan trips.
B. Spent fuel temperature is raised.
C. A refueling purge supply fan trips.
D. Containment air temperature is lowered.
A. A Fuel Building supply fan trips.
- The reactor is tripped.
- A small break LOCA is in progress.
- A loss of all Feedwater is in progress.
- Pressurizer level is 35%.
- Pressurizer pressure is 2275 psia and rising.
Which one of the following would be an indication that RCS voiding is occurring?
A. Pressurizer level decrease when letdown flow is raised.
B. RCS pressure increase when pressurizer spray is initiated.
C. Pressurizer level increase when pressurizer spray is activated.
D. RCS pressure decrease when pressurizer heaters are energized.
C. Pressurizer level increase when pressurizer spray is activated.
- The reactor is tripped
- A LOCA is in progress
- Pressurizer level is 35%
- RVLMS is inoperable
- RCS voiding is occurring
Which one of the following would be an indication that the RCS void has reached the outlet plenum?
A. Pressurizer level increases.
B. Saturated conditions on RCS loop temperatures.
C. HPSI flow decreases.
D. RCS pressure decrease when pressurizer heaters are energized.
B. Saturated conditions on RCS loop temperatures.
When cross-connecting Train “B” EW to NC in accordance with Standard Appendix 63, which one of the following valves is operated from the Control Room?
A. NCN-UV-99, NC CTMT HEADER RETURN
B. EWB-HCV-54, “B” SDCHX OUTLET ISOLATION
C. EWA-HCV-53, “A” SDCHX OUTLET ISOLATION
D. EWB-HCV-66, EW CROSS-TIE VLV TO NC
A. NCN-UV-99, NC CTMT HEADER RETURN
Which one of the following conditions would cause a ‘A’ Main Feedwater Pump Turbine trip?
A. FWPT high eccentricity at 2 mils.
B. FWPT suction pressure at 255 psig for 10 seconds.
C. FWPT inactive thrust bearing wear oil pressure at 35 psig.
D. FWPT vacuum is 14.5 inches HgA.
D. FWPT vacuum is 14.5 inches HgA.
- Unit 1 is operating at rated power.
- A CREFAS is manually initiated with both trains of Control Room Essential AFUs running.
- Window 7B01A “INST AIR SYSTEM TROUBLE” alarms.
- Instrument Air header pressure is noticed to be lowering.
If the air problem continues to degrade, the Control Room Essential AFUs….
A. will trip.
B. will lose cooling water.
C. outside air dampers will fail open.
D. ventilation lineup will not change.
D. ventilation lineup will not change.
- Unit 1 is operating at rated power.
- A failure of CHB-UV-515, letdown to regen heat exchanger, caused a loss of letdown.
- PZR level is 55%.
- The operating crew has stopped all charging pumps to establish conditions to support extended operations with letdown isolated.
- A loss of nuclear cooling water occurs.
To avoid tripping the reactor and securing all RCPs, the operating crew must restore:
A. NC within 3 minutes.
B. seal injection within 10 minutes.
C. both seal injection and NC within 3 minutes.
D. both seal injection and NC within 10 minutes.
A. NC within 3 minutes.
