Week 4-5 Flashcards
The plant is at 100% power.
A gradual loss of instrument air occurs.
As instrument air pressure decreases, which of the following events occur first?
A. Condensate pump miniflow valves fail open.
B. Main feedwater pump speed decreases.
C. Feedwater economizer reg valves fail in current position.
D. Heater drain tank pump discharge valve fails open.
A. Condensate pump miniflow valves fail open.
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. ventilation lineup will not change.
D. outside air dampers will fail open.
C. ventilation lineup will not change.
Following a complete Loss of All Instrument Air (without IA system backup Nitrogen), which one of the following conditions describes the final status of the Steam Generator #1 Feedwater Economizer Isolation Valve (SGA-UV-174) with NO operator action?
A. Fails fully OPEN.
B. Fails fully SHUT.
C. Fails AS-IS.
D. Modulates on FWCS demand.
C. Fails AS-IS.
- A Loss of Instrument Air has occurred.
- Nitrogen is supplying the Instrument Air Header.
In order to reduce the possibility of Nitrogen buildup in the Auxiliary Building, which of the following actions are taken?
A. Isolate Instrument Air to the Auxiliary Building.
B. Open all Auxiliary and Fuel Building Rollup Doors.
C. Start a Fuel Building Essential Exhaust Fan taking suction on the Fuel Building.
D. Start a Fuel Building Essential Exhaust Fan taking a suction on the Auxiliary Building.
D. Start a Fuel Building Essential Exhaust Fan taking a suction on the Auxiliary Building.
Following a complete Loss of All Instrument Air (No Nitrogen backup), which one of the following conditions describes the final status of a Main Steam Isolation Valve with NO operator action?
A. Fails fully OPEN.
B. Fails fully CLOSED.
C. Fails AS-IS, and can only be slow closed.
D. Fails AS-IS, but can be fast closed.
D. Fails AS-IS, but can be fast closed.
At less than 80 psig instrument air header pressure, the Heater Drain Pump discharge valves will:
A. Fail open
B. Fail closed
C. Fail as-is
D. Remain unaffected, since they are on nitrogen backup
B. Fail closed
- Instrument Air isolation valve IAA-UV-2 has inadvertently closed and will not reopen.
- Service air backup is unavailable for containment.
Which one of the following describes the expected response of the Reactor Coolant Pump Seal Injection Supply Flow Control Valves (CHE-FV241, 242, 243 and 244) as containment IA header pressure drops below 26 psig?
A. Fail locked.
B. Fail fully closed.
C. Fail fully open.
D. No response, they are motor operated.
C. Fail fully open.
In the installed Ingersoll-Rand Instrument Air Compressors, which of the following provides the motive force for the oil to circulate through system?
A. Separator Tank Pressure.
B. A DC driven oil pump.
C. An AC driven oil pump.
D. The delta P across the Coolant Filter.
A. Separator Tank Pressure.
- The reactor is at 100% power.
- All instrument air compressors are running.
- IA header pressure is 88 psig and gradually decreasing.
Which one of the following states when the reactor should be tripped and the Emergency Operation procedures implemented according to 40AO-9ZZ06,”LOSS OF INSTRUMENT AIR”?
A. If instrument air pressure decreases to 65 psig and the Front Standard Turbine Trip Air Relay Dump Valve actuates its low pressure switches.
B. If instrument air pressure can not be maintained above 73.5 psig.
C. If instrument air pressure cannot be maintained above 85 psig with the Nitrogen Backup Valve open.
D. If the CRS determines that a trip is needed due to reduced instrument air pressure.
D. If the CRS determines that a trip is needed due to reduced instrument air pressure.
- Instrument air header pressure is 65 psig.
- The reactor has been manually tripped from 100% power due to plant instability.
Based on these conditions, what means of ADV operations are available?
A. normal for one closure only.
B. only local operation in the MSSS.
C. normal operation for > 13 hours.
D. only at the remote shutdown panel.
C. normal operation for > 13 hours.
- A gradual loss of Instrument Air is occurring.
- The area operator reports a large differential pressure across the in service Instrument Air Dryer.
Which one of the following actions should be taken to assist in correcting this problem?
A. Shift Air Dryers
B. Bypass Air Dryers
C. Shutdown Air Dryers
D. Vent the Air Dryers
A. Shift Air Dryers
- The Reactor was tripped due to a degrading condenser vacuum.
- Immediately after the trip, the Secondary Operator became involved with the B01 report. When this operator returned to B06, condenser backpressure was 9.0” HgA (highest shell).
- Steam Generator levels are both 65% WR.
Assuming no other operator performed actions on B06, in what condition can this operator expect to find the secondary plant?
A. No feed with SBCS valves 1001 & 1004 maintaining SG pressure.
B. Main Feed Pumps feeding in RTO with SBCS valves 1007 & 1008 maintaining SG pressure.
C. Main Feed Pumps feeding in RTO with MSSVs maintaining SG pressure.
D. No feed with SBCS valves 1007 & 1008 maintaining SG pressure.
B. Main Feed Pumps feeding in RTO with SBCS valves 1007 & 1008 maintaining SG pressure.
Describe how the SBCS Condenser Interlock is reset.
A. Depress the SBCS Condenser Interlock Reset button at the RRS test panel.
B. Place the Emergency Off Reset Switch to the EMERGENCY OFF position then to the RESET position.
C. Place the Emergency Off Reset Switch to the RESET position.
D. Place the SBCS Mater in MANUAL then back to AUTO
C. Place the Emergency Off Reset Switch to the RESET position.
- A down-power is in progress in accordance with 40AO-9ZZ07 due to an air inleakage problem on the Main Condenser.
- The Main Generator is presently operating at 400 Mwe.
- Backpressure is noted to increase to 5.2” HgA on the ‘C’ shell.
Based on these conditions, the operating crew:
A. must reduce backpressure to less than 4” HgA within one hour.
B. can continue operating indefinitely.
C. must immediately trip the Main Turbine and take actions iaw 40AO-9ZZ08.
D. must immediately trip the Reactor and perform SPTA’s.
D. must immediately trip the Reactor and perform SPTA’s.
- Unit 1 is operating at rated power when backpressure in the Main Condenser starts to rise.
- Regulating Group 5 is at 135 inches.
- Turbine load is being shifted to SBCS valve 1007 in an effort to stabilize backpressure.
- CEDMCS is inadvertently left in AUTO SEQUENTIAL.
- Assuming Steam Demand remains constant.
The Operating Crew should expect CEAs to…
A. start stepping in.
B. start stepping out.
C. remain in their present position due to AMI.
D. remain in their present position due to AWP.
A. start stepping in.