Plant Computer

Question 1

How does COLSS interface with RPS?

A. Incore detectors are used to calibrate NI’s.
B. JSCALOR is used to calibrate safety channel NI’s.
C. RCS flow from COLSS feeds the DNBR trip.
D. Incore detectors are monitored for the DNBR trips.

Answer 1

Answer: B

Question 2

A COLSS CMC alarm is received. The Group Display for COLSS CMC is displayed. Point ID NKTMFLOW, RCS flowrate value, indicates an ‘N’. Determine which one of the following calculations is affected?

A. DNBR POL
B. ASI
C. AZ Tilt
D. LPD POL

Answer 2

Answer: A

Question 3

On a loss of the plant computer, CEAs can…

A. only be moved in Manual Group and Manual Individual.
B. not be moved.
C. only be moved in Manual Group.
D. be moved in any CEDMCS mode, except standby.

Answer 3

Answer: A

Question 4

Unit 1 is operating at rated power. A Regulating Group 5 CEA drops to the bottom. The Rod Bottom Light on the mimic illuminates, and the crew takes actions per 40AO-9ZZ11, CEA Malfunctions. The COLSS Power Operating Limit (POL) is -99.0. Based on these conditions, COLSS…

A. is DEFINITELY inoperable due to the dropped rod, requiring 72ST-9RX03 (COLSS Inoperability) to be performed.
B. is performing exactly the way it was designed, and is fully operable.
C. is DEFINITELY inoperable and power should immediately be reduced at least 20%.
D. MAY be inoperable, and requires a functional determination (77OP-9RJ04) to be performed.

Answer 4

Answer: D