Aux Feed Flashcards
Unit 1 is at 100% power with all systems in a normal lineup.
An unisolable steam break in the MSSS causes a reactor trip and SIAS/CIAS/MSIS.
SG #1 pressure is 1000 psia.
SG #2 pressure is 800 psia.
SG #1 level is 30% WR.
SG #2 level is 20% WR.
No operator action has been taken.
What is the status of feed to the steam generators?
A. AFA and AFB are feeding both steam generators.
B. AFA and AFB are feeding only SG #1.
C. Main Feed is feeding steam generators in RTO.
D. Steam generators are not being fed.
D
Unit 1 is at 100% power with all systems in a normal lineup.
An unisolable steam break in the MSSS causes a reactor trip and SIAS/CIAS/MSIS.
SG #1 pressure is 800 psia.
SG #2 pressure is 500 psia.
SG #1 level is 20% WR.
SG #2 level is 10% WR.
No operator action has been taken.
What is the status of feed to the steam generators?
A. AFA and AFB are feeding both steam generators.
B. AFA and AFB are feeding only SG #1.
C. Main Feed is feeding steam generators in RTO.
D. Steam generators are not being fed.
B
Unit 1 is at 100% power with all systems in a normal lineup.
An unisolable steam break in the MSSS causes a reactor trip and SIAS/CIAS/MSIS.
SG #1 pressure is 1000 psia.
SG #2 pressure is 900 psia.
SG #1 level is 24% WR.
SG #2 level is 20% WR.
No operator action has been taken.
What is the status of feed to the steam generators?
A. AFA and AFB are feeding both steam generators.
B. AFA and AFB are feeding only SG #1.
C. Main Feed is feeding steam generators in RTO.
D. Steam generators are not being fed.
A
Unit 1 is at 100% power with all systems in a normal lineup.
A loss of condenser vacuum causes a reactor trip.
Condenser vacuum is at 15” HgA and degrading.
The CO establishes feed to both steam generators with AFN-P01.
After feed was established, a primary leak causes a SIAS and CIAS.
Steam Generator levels are 55% NR.
With no further operator action, Auxiliary Feed Pump ___(1)___ is running, and steam generators ___(2)___.
A. (1) AFN-P01; (2) are not being fed
B. (1) AFN-P01; (2) are being fed
C. (1) AFB-P01; (2) are not being fed
D. (1) AFB-P01; (2) are being fed
C
Unit 3 is at 100% power with all systems in a normal lineup.
A loss of NBN-S01 causes a trip of both main feed pumps.
The Reactor Trips on low SG #1 level.
The CO starts feeding both steam generators with AFB-P01.
AFAS-1 actuates on low SG #1 level.
Which of the following statements is true?
A. Both steam generators are being fed with AFA-P01 and AFB-P01.
B. SG #2 is being fed with AFB-P01 only.
C. SG #2 is not being fed. The CO must override AF valves to re-establish feed to SG #2.
D. SG #2 is not being fed. The CO can only feed SG #2 with AFN-P01.
C
Unit 3 is at 100% power with all systems in a normal lineup.
A primary coolant system break causes a SIAS/CIAS/MSIS.
Five minutes later, PKA-M41 develops a ground fault and de-energizes.
Which of the following is an accurate list of pumps that may be started from the control room under these conditions?
A. Main Feed Pumps, AFA-P01, & AFB-P01
B. Main Feed Pumps & AFB-P01
C. AFN-P01 & AFB-P01
D. AFB-P01 only.
D
Unit 3 is at 100% power with all systems in a normal lineup.
A primary coolant system break causes a SIAS/CIAS/MSIS.
Five minutes later, PKB-M42 develops a ground fault and de-energizes.
Which of the following is an accurate list of pumps that may be started from the control room under these conditions?
A. Main Feed Pumps, AFA-P01, & AFN-P01
B. Main Feed Pumps & AFN-P01
C. AFA-P01 & AFN-P01
D. AFA-P01 only.
C
Unit 2 is at 100% power with all systems in a normal lineup.
A loss of NBN-S01 causes a trip of both main feed pumps.
The reactor is manually tripped. During SPTAs, AFAS-1 and AFAS-2 actuate on low SG levels.
The CO establishes feed to both SGs with AFN-P01.
Then, the CO overrides all 8 AF discharge valves and closes them.
Two minutes later, a complete loss of offsite power occurs.
SG levels are both 20% WR.
With no further operator action, both steam generators are being fed by…
A. AFA-P01 and AFB-P01
B. AFB-P01
C. AFN-P01
D. nothing
B
Unit 2 is at 100% power with all systems in a normal lineup.
A loss of NBN-S01 causes a trip of both main feed pumps.
The reactor is manually tripped. During SPTAs, AFAS-1 and AFAS-2 actuate on low SG levels.
The CO establishes feed to both SGs with AFN-P01.
Then, the CO overrides all 8 AF discharge valves and closes them.
Ten minutes later, a complete loss of offsite power occurs.
SG levels are both 44% WR.
With no further operator action, both steam generators are being fed by…
A. AFA-P01 and AFB-P01
B. AFB-P01
C. AFN-P01
D. nothing
D
A class-powered indicator for steam generator wide range level is available on which of the following control boards? A. B05 only B. B02 and B05 only C. B02, B05, and B06 only D. B02, B04, B05, and B06.
D
Unit 3 is at 100% power with all systems in a normal lineup.
Condenser vacuum degrades to atmospheric pressure, causing a trip of the reactor and both main feed pumps.
During SPTAs, the CO aligns AFN-P01 and starts feeding both steam generators.
Subsequently, a primary coolant leak causes a SIAS/CIAS/MSIS.
With no further operator action, AFN-P01 is ___(1)___, and its suction valves CTA-HV-1 and CTA-HV-4 are ___(2)___.
A. (1) not running; (2) open
B. (1) not running; (2) closed
C. (1) running; (2) open
D. (1) running; (2) closed
A
