C-Signals

C-Signals

C-1: IR Rod Stop
1. Purpose: Prevent reaching IR & PR Hi Flux
2. Setpoint: IR amps ~ = 20% PR
3. Notes:
  1. Stops outward rod motion in auto and manual
  2. Can be manually blocked when P-10 is met (2/2 switches)
  3. Auto unblocked when P-10 no longer met
4. Coincidence: 1/2 IR Channels
C-2: PR Rod Stop
1. Purpose: Prevent reaching PR Hi Flux Trip
2. Setpoint: 103%
3. Notes:
  1. Stops outward rod motion in auto and manual
  2. Can be bypassed at NIS cabinet
4. Coincidence: 1/4 PR Channels
C-3: OTN16 Rod Stop
1. Setpoint: 3% < OTN16 Rx Trip Setpoint
2. Coincidence: 2/4 NI Channels
3. Notes:
  1. Stops outward rod motion in auto and manual
  2. Generates Turbine Runback:
    1. 1.5 sec @ 200%/min, off for 28.5 sec, cycle until C-3 clears
C-4: OPN16 Rod Stop
1. Setpoint: 3% < OPN16 Rx Trip Setpoint
2. Coincidence: 2/4 NI Channels
3. Notes:
  1. Stops outward rod motion in auto and manual
  2. Generates Turbine Runback
    1. 1.5 sec @ 200%/min, off for 28.5 sec, cycle until C-4 clears
C-5: Low Power Interlock
1. Setpoint: <= 15% Turbine PWR
2. Coincidence: 1/1 from PT-505 or 506
3. Notes:
  1. Based on which 1st stage pressure transmitter selected to input to rod control
  2. Stops outward rod motion in auto w/PWR <= 15%
C-7: Loss of Load
1. Setpoint: 10% w/time constant of 120 sec
2. Coincidence: Based on Turbine PWR load reduction
3. Notes:
  1. Allows steam dumps to open (arms) in Tave mode following load reject
  2. Setpoint variable based on rate, i.e. 5%/min actuates C-7 in 10 min, 10% min immediately
C-11: Control Bank D Rod W/drawal Limit
1. Setpoint: 223 steps
2. Coincidence: None
3. Notes:
  1. Stops outward rod motion in auto only
C-16: Stop Turbine Loading
1. Purpose: Prevent excessive Tave droop
2. Setpoint:
  1. 553 deg F auctioneered low Tave, OR
  2. Auctioneered low Tave < Tref by 20 deg F
3. Coincidence: None
4. Notes:
  1. Stops Turbine loading when met
C-20: AMSAC
1. Setpoint: > 40% Turbine PWR in last 260 sec
2. Coincidence: Fed from PT-505/506
3. Notes:
  1. Enables AMSAC actuation circuit
C-9: Condenser Interlock
1. Setpoint: >12.3" Hg
2. Coincidence: 2/2 Cond Vacuum and 2/4 CW Pump BKRs closed
3. Notes:
  1. Allows steam dumps to open when C-9 met

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	Created by Lauren Neuburger about 8 years ago

	Copied by Lauren Neuburger about 8 years ago