GOP Flashcards
The Shutdown and Part-Strength rods have been withdrawn in preparation for a Reactor Startup. The crew is ready to begin withdrawal of the Regulating Group CEAs in accordance with 40OP-9ZZ03. Of the following evolutions in progress at the time, identify which one is required to be stopped prior to the withdrawal of reg group CEA’s?
A. RCS sampling activities.
B. Boron equalization.
C. Turbine prewarming.
D. Dilution.
Answer: D
A reactor startup is in progress after a two week mid-cycle outage. The ECC (Estimated Critical Condition) has the following data:
ECRP -500 pcm…….Group 3 at 100 inches
ECRP…………………..Group 4 at 90 inches
ECRP +500 pcm……All Rods Out
Criticality is achieved and verified with Group 3 at 90 inches withdrawn. What is the required operator response?
A. Insert regulating group rods to their lower group stop and emergency borate.
B. Trip the reactor and emergency borate.
C. Insert ALL CEAs to their lower group stop.
D. Insert regulating group rods to their lower group stop.
Answer: D
A 1/M plot may predict a higher than actual ACP while withdrawing Regulating Group 3 CEAs between 45” and 105”. Which one of the following is the reason for this?
A. Group 4 CEAs are typically worth less in that region.
B. Group 3 CEAs are typically worth less in that region.
C. Some group 4 CEAs shadow the Excore Nuclear Instruments.
D. Group 3 is shadowing the excore Nuclear Instruments in that region.
Answer: C
The Unit is in Mode 6 with core off-load is in progress. Chemistry calls and reports that the Boron concentration is 2290 ppm in the RCS and 3010 in the refueling canal. The COLR limit is specified as 3000 ppm. What are all the action(s) if any that should be taken?
A. Suspend positive reactivity additions as soon as possible.
B. Initiate action to restore Boron concentration to within limits, suspend positive reactivity additions and core alternations immediately.
C. No action is required, refueling boron concentration is in specification.
D. Initiate action to restore Boron concentration to within limits, suspend core alternations within one hour.
Answer: B
A reactor startup is in progress after a mid-cycle outage. The ECC data is as follows:
ECRP -500 pcm ……………… Group 3 at 95 inches ECRP ……………………………. Group 4 at 60
ECRP+500 …………………….. ARO
Criticality is achieved with Regulating Group 3 at 90 inches withdrawn. What is the required Operator response?
A. Insert regulating group rods to their lower group stop and verify adequate shutdown margin.
B. Trip the Reactor and Emergency Borate.
C. Insert regulating group rods to their lower group stop and Emergency Borate.
D. Insert rods as necessary to hold at the current power level and take critical data.
Answer: A
A reactor startup is in progress after a two week mid-cycle outage. The ECC has the following data:
ECRP -500 pcm………Group 3 at 90 inches
ECRP…………………….Group 4 at 74 inches
ECRP +500 pcm……..All Rods Out
Criticality is achieved and verified with Group 3 at 70 inches withdrawn. What is the required operator response?
A. Insert regulating group rods to their lower group stop.
B. Trip the reactor and emergency borate.
C. Insert regulating group rods to their lower group stop and emergency borate.
D. Insert rods as necessary to hold at the current power level and take critical data.
Answer: A
During a reactor startup, which of the following describes the required action if criticality is achieved above the PDILs and below the -500 pcm position?
A. Insert regulating groups to their lower group stops.
B. Stabilze power and take critical data.
C. Insert ALL CEAs to their lower group stops.
D. Immediately trip the reactor and commence boration.
Answer: A
