P's and C's Flashcards
What is C-1
IR Rod Stop 1/2 IRNI > 18% (16%)
What is C-2
PR Rod Stop 1/4 PRNI >103%
What is C-3
OT Delta T Rod Stop 2/4 PRNI 3% < trip Setpoint
What is C-4
OP delta T Rod Stop 2/4 PRNI 3% < trip setpoint
What is C-5
Turbine Power Interlock MPC-253 < 15%
What is C-7A?
Load rejection bistable. 10% step change or sustained ramp decrease of a given magnitude for a long enough time period
What is C-7B?
Load rejection bistable 30% step change. From turbine impulse pressure MPC-254. Arms steam dump valves for load rejection operation
What is C-11
Control Bank D Rod Stop CBD @ 229 steps (cycle dependent)
What is C-20?
2/2 Turbine impulse pressures (MPC-253 and 254) greater than 40% equivalent power “enables” AMSAC
What does C-1, IR Rod Stop do and when can it be blocked?
Stops Auto and Manual Rod Withdrawl Blocked when IR range High Flux Trip is blocked (P-10) Auto unblocked
What does C-2, PR Rod Stop do and when can it be blocked?
Stops outward rod motion in Auto and Manual Blocked when Rod Stop Bypass selected to alarming channel
What does C-3, OT delta T Rod Stop do and when can it be blocked?
Stops outward rod motion in Auto and Manual Cannot be blocked
What does C-4, OP delta T Rod Stop do and when can it be blocked?
Stops outward rod motion in Auto and Manual Cannot be blocked
What does C-5, Turbine Power Interlock do and when can it be blocked?
Stops outward rod motion in AUTO only Cannot be blocked
What does C-11, Control Bank D Rod Stop do and when can it be blocked?
Stops outward motion in AUTO only Cannot be blocked
Which permissives are there really no status lights for?
P-4 and P-14
What condition will make the P-4 Status Light “ON”?
Both Rx Trip Breaker A and Bypass Breaker A open OR Both Rx Trip Breaker B and Bypass Breaker B open
What is the function of the P-4 Status Light being “on”?
Combines w Low Tavg to give FWI
Seals in FWI from SI or Hi-Hi SG Level
Permits manual block of all automatic SI signals
What condition will make the P4 Status Light OFF?
Either the Rx Trip or Bypass breaker is racked in and closed
What is the function of the P-4 Status Light being “off”?
Prevents or defeats manual block of SI
What condition will make the P-6 Status light ON?
Any IR NI ≥ 10-10 amps and rising
What is the function of the P-6 Status light being On?
Permits manual block of the SR High Flux Trip