3.1 Reactivity Control Systems Flashcards
3.1.1
Shutdown Margin - RX trip breakers open
modes 3-5 or CEA drive systems not capable of withdrawal
3.1.1
What is the Condition (s)?
What is the action and time limit?
A. SDM not within limit
Borate to restore; 15 minute completion time
3.1.2
SDM - Rx trip breakers closed
Modes 3-5 and CEA drive systems are capable of withdrawal
3.1.2
Condition(s)?
Action and Time limit?
A. SDM not within limit
Borate to restore; 15 minutes
B. K(n-1) not within limit when Tc = 500F or Rx criticality can be achieved by shutdown CEA movement
=>Vary CEAs to restore AND initiate boration 15 minutes
3.1.3
Reactivity Balance must be close to predicted values
Mode 1
3.1.4
Moderator temp coefficient maintained within limits of COLR
Modes 1 &2
3.1.5
CEA Alignment
Modes 1 & 2
All Full Strengths OPERABLE and all full and part strengths within 6.6” of all others in their respective groups
3.1.5
What will make you have to trip immediately?
2 or more CEAs trippable and misaligned from their group by > 9.9” (Condition D)
3.1.6
Shutdown CEA Insertion limits
All S/D CEAs shall be withdrawn to > 147.75”
modes 1, mode 2 with any regulating CEA not fully inserted.
3.1.7
Reg Group CEA Insertion limits
Modes 1 & 2
PDIL operable and COLSS in service or without COLSS in service, limited to sequences and limits in the COLR
3.1.8
Part Strength CEA Insertion Limits
Modes 1 &2
Keep the limits to those in the COLR
3.1.9
Special Test Exemption Shutdown Margin
Modes 2 & 3 during physics testing
Allows suspension of 3.1.2, 3.1.6, 3.1.7
3.1.10
Special Test Exceptions
Modes 1 & 2
During Physics Testing, allow suspending several TS requirements.
3.1.11
STE Reactivity Coefficient Testing
Mode 1 >20% pwr during physics testing allows suspension of TS as long as LHR and DNBR stay less than COLR limits.
