COLSS

Question 1

Unit 1 is at 100% power with all systems in a normal lineup.
Steam header pressure transmitter SGN-PT-1024 begins to drift low, but remains within the acceptable range for COLSS.
What will happen to JSCALOR as the transmitter continues to drift?
A. JSCALOR will indicate greater than actual secondary power. Once SGN-PT-1024 falls less than the acceptable range, SGN-PT-1027 will be automatically substituted.
B. JSCALOR will indicate less than actual secondary power. Once SGN-PT-1024 falls less than the acceptable range, SGN-PT-1027 will be automatically substituted.
C. JSCALOR will indicate greater than actual secondary power. Once SGN-PT-1024 falls less than the acceptable range, JSCALOR will fail.
D. JSCALOR will indicate less than actual secondary power. Once SGN-PT-1024 falls less than the acceptable range, JSCALOR will fail.

Answer 1

C

Question 2

Unit 1 is at 100% power with all systems in a normal lineup.
Steam flow transmitter SGN-FT-1011 begins to drift low, but remains within the acceptable range for COLSS.
What will happen to JSCALOR as the transmitter continues to drift?
A. JSCALOR will indicate greater than actual secondary power. Once SGN-FT-1011 falls less than the acceptable range, SGN-FT-1012 will be automatically substituted.
B. JSCALOR will indicate less than actual secondary power. Once SGN-FT-1011 falls less than the acceptable range, SGN-FT-1012 will be automatically substituted.
C. JSCALOR will indicate greater than actual secondary power. Once SGN-FT-1011 falls less than the acceptable range, JSCALOR will fail.
D. JSCALOR will indicate less than actual secondary power. Once SGN-FT-1011 falls less than the acceptable range, JSCALOR will fail.

Answer 2

A

Question 3

Unit 3 is at 100% power with all systems in a normal lineup.
CEA 66 slips to 30” withdrawn..
The CO notes COLSS PC ALARM (window 5B01D) is in alarm, with the RJ point COLSS CPC AZTILT ALARM.
This alarm came in because ___(1)___. COLSS is currently ___(2)___.
A. (1) CPCs have detected COLSS Azimuthal Tilt is greater than the allowable threshold; (2) in service.
B. (1) CPCs have detected COLSS Azimuthal Tilt is greater than the allowable threshold; (2) not in service.
C. (1) COLSS Azimuthal Tilt has exceeded a constant value that was entered into the CPCs; (2) in service.
D. (1) COLSS Azimuthal Tilt has exceeded a constant value that was entered into the CPCs; (2) not in service.

Answer 3

C

Question 4

Unit 1 is at 100% power with all systems in a normal lineup.
Power has been stable for 60 days. The only reactivity manipulations have been dilutions to account for fuel depletion.
Consider the following COLSS calculated powers:
JCPCAL: Calibrated primary power
NKBDELT: Uncalibrated primary power
NKCBTFSP: Calibrated turbine power
NKBTFSP: Uncalibrated turbine power
JSCALOR: Smoothed secondary power
Provided all are calculating correctly, which will be used for calculating the Power Dependent Insertion Limit?
A. JSCALOR
B. JCPCAL only
C. NKCBTFSP only
D. The higher of JCPCAL or NKCBTFSP

Answer 4

D

Question 5

Unit 3 is at 100% power with all systems in a normal lineup.
Power has been stable for 60 days. The only reactivity manipulations have been dilutions to account for fuel depletion.
Consider the following COLSS calculated powers:
JCPCAL: Calibrated primary power
NKBDELT: Uncalibrated primary power
NKCBTFSP: Calibrated turbine power
NKBTFSP: Uncalibrated turbine power
JSCALOR: Smoothed secondary power
Provided all are calculating correctly, which should be used for maintaining the plant at 100% power?
A. JSCALOR
B. JCPCAL or NKCBTFSP, whichever is higher
C. NKBDELT or NKBTFSP, whichever is higher
D. The highest of the five, based on a rolling 12 hour average.

Answer 5

A

Question 6

Which of the following does COLSS use when determining planal radial peaking factors?
A. Average inlet moderator specific volume
B. Incore nuclear instruments
C. Pressurizer pressure
D. Calculated Azimuthal Tilt

Answer 6

A

Question 7

The COLSS Departure from Nucleate Boiling Ration Power Operating Limit will be lowered if:
A.  RCP speed is raised
B.  RCP differential pressure is raised
C.  Pressurizer Pressure is raised
D.  ASI changes from -0.001 to +0.001

Answer 7

B

Question 8

The COLSS Departure from Nucleate Boiling Ration Power Operating Limit will be raised if:
A.  RCP speed is lowered
B.  Minimum Tc is lowered
C.  Pressurizer Pressure is lowered
D.  Azimuthal Tilt is lowered

Answer 8

D

Question 9

Which of the following events would result in the Power Dependent Insertion Limit Alarm circuit being inoperable?
A. JSCALOR was removed from service due to a failed Ultrasonic Flow Meter.
B. A Reactor Regulating System failure caused inward auto-sequential CEA movement for forty seconds.
C. Power is lost to PNC-D27
D. CEA #1, Part Strength CEA in subgroup 8, slips to 75 inches withdrawn.

Answer 9

C