CEAC Flashcards
RCS Temperature constant
Rx Power constant
Ignoring the effects of ASI, how would inserting CEA’s from ARO to 75 inches withdrawn affect the CPC calculated value of LPD?
A. Gradually decrease as CEAs are inserted.
B. No change, LPD is not affected by CEA position.
C. Gradually increase as CEAs are inserted.
D. No change until Group 5 is at 108 inches, then it will decrease.
Answer: C
Rx at 75% RTP Initially CEAs are ARO A single 12 finger CEA slips to 135 inches withdrawn No Rx trip occurs COLSS CEA position has not been updated Based on these conditions, the magnitude of the associated CEAC penalty factor will…
A. decrease over time reaching a zero value after 6 hours.
B. increase over time reaching a maximum after 6 hours.
C. increase over time reaching a maximum value after one hour.
D. not change for the next 6 hours, then increase over time reaching a maximum value after 24 hours.
Answer: B
A twelve finger CEA in Regulating Group 3 slips from 150” to 88” withdrawn. All other CEAs are ARO. Unit is at 100% power. What is the affect of this dropped rod on CPCs and CEACs?
A. All four CPCs will immediately trip on LPD and DNBR due to an out of sequence condition.
B. No CPCs will trip. CEACs will send a small penalty factor to all CPCs.
C. One CPC will immediately trip on LPD and DNBR. CEACs will send a penalty factor to the other CPCs.
D. One CPC will immediately trip on LPD and DNBR. CEACs will send no penalty factor to the other CPC’s.
Answer: C
Unit 1 is operating at rated power A Regulating Group 5 CEA has been determined to be UNTRIPPABLE (STUCK) The Operating Crew is reviewing the Tech Specs associated with this problem While they are performing this, a trip of the ‘B’ MFP occurs Based on this, which ONE of the following describes how the plant will respond?
A. The reactor will trip immediately.
B. A normal RPCB will be completed.
C. The reactor will trip in approximately 30 seconds.
D. A RPCB will occur, however a building penalty factor will eventually (within 10 minutes) lead to a plant trip.
Answer: A
Given a loss of PND-D28, which of the following identifies the most complete status of CEACs?
A. CEAC # 1 becomes inop due to loss of power to RSPTs.
B. CEAC # 2 becomes inop due to loss of power to RSPTs.
C. CEAC #1 loses power.
D. CEAC #2 loses power.
Answer: B
Unit 1 is at 80% power and dropped a 4 finger CEA. Unit 2 is at 80% power and dropped a 12 finger CEA. Assume that the CEAs remained misaligned. What would be the impact on the respective CEACs?
A. Both units will eventually trip due to a penalty factors ramping in over the next 6 hours.
B. Neither unit will trip based on these misaligned CEAs.
C. In Unit 1 the 4 finger CEA will effectively generate NO CEAC penalty factor, whereas in Unit 2, the 12 finger CEA will eventually trip the reactor due to a penalty factor ramping in.
D. In Unit 2, the 12 finger CEA will effectively generate NO CEAC penalty factor, whereas In Unit 1, the 4 finger CEA will eventually trip the reactor due to a penalty factor ramping in.
Answer: C
