ESAS Flashcards
What must be done before resetting the 27/86 relay?
Ensure all amber disagreement lights are cleared and EDGs can accept load.
How many RB 4# channels can be defeated?
Only 2 of 3 RB 4# channels can be defeated.
Does the HPI/LPI bypass permit light go out when bypassed?
No, the bypass permit light does not go out, but the DEFEAT permit light does.
What must be cleared first, the 4# manual or the 1600# signal?
The 4# manual must be cleared before the 1600# signal; otherwise, re-actuation will occur.
What powers the PCR lights?
PCR lights are powered by VBA/VBB.
What does the switch at the bottom of the PCR allow?
It allows swapping to all VBA/VBB.
Can the RESET function be used if RB pressure is greater than 30#?
No, RESET has no function if RB pressure is greater than 30#. Pressure must be reduced first.
What does the 4# signal initiate?
It initiates RTI, 1600#, and BS-V-s. It has no bypass button, only defeat, due to no expected condition to create this pressure.
When does the 1600/500# channel auto-reenable?
It auto-reenables if in BYPASS and RCS pressure goes above 1750#. It does not auto-reset if not in bypass.
What feeds the RTI signal?
RTI is fed from A/B/C RPS.
Can RTI be defeated when the reactor is not tripped?
No, RTI cannot be defeated when the reactor is not tripped.
What happens to the ENABLED light when the reactor is manually tripped?
The ENABLED light remains ON until the RPS setpoint is reached.
What blocks 1M and 1C ESV auto-transfers during ES?
Only 1 train of ES blocks 1M and 1C ESV auto-transfers.
What steps are required to reset a 27/86 lockout?
Clear ES, restore power, open EDG breaker, and push the 27/86 reset button.
What actions should be taken for an inadvertent ES?
(1) DEFEAT ES, (2) Secure MUPs not required for seal injection, (3) Throttle MU-V-16s to keep MUP flow >115 gpm.
What happens if VBC is lost?
Channel 3 trips both A and B trains.
What happens if VBD is lost?
Channel 3 of the B train trips.
What is the expected LBLOCA sequence?
1900# RTI, 1600# HPI, 4# RB, 30# RB, 500# LPI.
What must be done if an ES 4kV loss of voltage relay fails in an untripped state?
You must trip it within 72 hours.
What happens when a channel bypass is hit?
It re-energizes the affected relay.
What is the consequence of an electrical fault in the relay cabinet?
The channel cannot be bypassed since it cannot be re-energized.
What happens if a vital bus is lost and another channel is affected by a faulted relay?
You won’t be able to bypass the train, and AOP-046 will require a reactor trip with no MU-V-16 control.
