Excore NIs Flashcards
Which set of Excore Nuclear Instrumentation displays the largest range?
A. Start-up Chanels
B. Control Channels
C. Class 1E Safety Channels Log Power
D. Class 1E Safety Channels Linear Power
C. Class 1E Safety Channels Log Power
Unit 1 is Rated Thermal Power
The lower safety channel detector for the ‘C’ channel fails to zero output
Channel ‘C’ linear power will…
A. Decrease and log power will remain the same
B. Decrease and log power will decrease
C. Remain the same and log power will decrease
D. Remain the same and log power will remain the same
A. Decrease and log power will remain the same
What B05 indications would be observed if the middle detector on the safety channel failed low while at 100% power?
A. Log channel indication would decrease by 1/3
B. Linear channel indication would go to 1/3
C. Log channel indication would go to 0
D. Linear channel indication would go to 0
C. Log channel indication would go to 0
How does COLSS interface with RPS?
A. RCS flow from COLSS feeds the DNBR trip.
B. JSCALOR is used to calibrate safety channel NI’s
C. Incore detectors are monitored for the DNBR trips
D. Incore detectors are used to calibrate NI’s
B. JSCALOR is used to calibrate safety channel NI’s
A reactor startup is in progress
A 0.4 DPM SUR is indicated on B04
The HIGH LOG power trip bypass permissive is just been received
Which one of the following indications is normal for the conditions given?
A. Control channels are on scale and increasing
B. Linear safety channel ‘B’ on scale and increasing
C. Startup channels indicate 2000 CPS and increasing
D. Log Safety Channel indicating approximately 1x10-4% power and increasing
D. Log Safety Channel indicating approximately 1x10-4% power and increasing
Which set of Excore Nuclear Instrumentation utilizes boron triflouride proportional counters?
A. Start-up channels
B. Control Channels
C. Class 1E Safety Channels Log Power
D. Class 1E Safety Channels Linear Power
A. Start-up Channels
A reactor startup following a refueling outage is in progress on Unit 2
The reactor is at the ECP-1000 pcm position
Subsequently:
The Channel ‘A’ Log Safety Channel NI failed low due to a transmitter failure.
Based on the listed conditions, what LCO actions, if any, must be taken in response to this failure?
A. Immediately determine RCS boron concentration per LCO 3.3.12, Boron Dilution Alarm System.
B. Immediately suspend positive reactivity additions per LCO 9.3.2, Nuclear Instrumentation
C. Place the applicable RPS bistable in bypass or trip within one hour per LCO 3.3.1, RPS Instrumentation - Operating
D. Place the applicable RPS bistable in bypass or trip within one hour per LCO 3.3.2, RPS Instrumentation - Shutdown
D. Place the applicable RPS bistable in bypass or trip within one hour per LCO 3.3.2, RPS Instrumentation - Shutdown
Unit 1 is in MODE 6
Core reload is in progress
Subsequently:
Audible indication of count rate for the Startup Range Monitors (SRMs) is lost inside Containment
Audible and visual SRM indications remain available in the Control Room
Based on these indications, the core reload…
A. MAY continue provided audible AND visual source range indications are available in the control room.
B. MUST be suspended in accordance with LCO 3.3.12 Boron Dilution Alarm System, Condition A, for two Required SRMs inoperable.
C. MAY continue provided audible source range indication is available in the control room AND the refueling machine maintains constant communications with the control room.
D. MUST be suspended and action must be taken to restore audible indication in containment in accordance with LCO 3.9.2 Nuclear Instrumentation, Conditions A and B for two required SRMs inoperable.
D. Must be suspended and action must be taken to restore audible indication in containment in accordance with LCO 3.9.2 Nuclear Instrumentation, Conditions A and B for two required SRMs inoperable.
