Summary of P's and C's Flashcards
List all Protection premissives
1: P-4 Reactor Trip Permissive - Reactor Trip and Bypass Breaker Open
2: P-6 IR block permissive - 1x10^-10 amps (1 of 2)
3: P-7 at power permissive - P-10 > 10% (2 of 4) or P-13 >10% (1 of 2)
4: P-8 single loop loss of flow RX trip permissive - 50% (2 of 4)
5: P-9 Turbine Trip RX Trip Permissive - 45% (2 of 4)
6: P-10 IR and PR low setpoint RX Trip Block Permissive
- 10% PR (2 of 4)
7: P-11 MS/PZR SI permissive 1950# PZR press. (2 of 3)
8: P-12 LO LO T-ave 550F (2 of 4)
9: P-13 10% turbine power (1 of 2)
10: P-14 High High SG Level - 90.8 SG NR (2 of 4 any SG)
List all Control Permissives
1: C-1 20% IR equiv. current (1 of 2)
2: C-2 103% PR (1of 4)
3: C-5 15% turbine power (1 of 1)
4: C-7A 15% or greater step change in turbine load or a >7.5%/min ramp decrease for 600 sec (1 of 1)
5: C-9 Condenser Available, >25” HgV (2 of 3) and at least 1 CW bkr shut
6: C-11 223 steps on Control Rod Bank D
7: C-16 Auctioneered low Tave <553 or Auctioneered low Tave 20F < Tref
8: C-20 AMSAC Control permissive - 20% turbine power (2 of 2)
Define P-4
Reactor trip permissive - Reactor Trip and Bypass Breaker Open Dual Trained Inputs to: - SI auto initiation block logic - FWI circuitry - Turbine Trip Circuitry - Steam Dump Circuitry - Limit MFP speed, limits to 4400 RPM
Define P-6
IR Block Permissive - 1 x 10^-10 IR amps (1 of 2)
- Allows blocking of the SR Trip (10^5 cps in SR)
- Resets at 5 X 10^-11 amps decreasing (2 of2)
Define P-7
At Power Permissive - P-10 (RX Power) > 10% (2 of 4) or - P-13 (turbine power) > 10% (1 of 2) enables trips from: - PRZ high level - PRZ low level - RCS two loop loss flow - RCP undervoltage - RCP underfrequency Rests at 8% decreasing (3 of 4 RX power or 2 of 2 Turbine power)
Define P-8
Single Loop Loss of Flow Reactor trip Permissive
- 50% PR (2 of 4)
This permissive enables the RCS single loop loss of flow reactor trip
resets at 48% decreasing (3 of 4)
Define P-9
Turbine Trip Reactor Trip Permissive
- 45% PR (2 of 4)
- resets at 43% decreasing (3 of 4)
Define P-10
IR and PR low Setpoint Reactor Trip Block Permissive
10% PR (2 of 4)
Performs the following:
- Allows manual block of the IR trip (25%) and rod block
- allows the operator to manually block the PR overpower low setpoint RX trip (25% PR)
- Provides a back-up signal to set the RPS source range block (P-6 back up)
- inputs to P-7
resets at 8% decreasing (3 of 4)
Define P-11
MS/PZR/SI permissive - 1950# PZR press (2 of 3)
resets at 1941 decreasing (2 of 3)
- allows manual block of low PZR press. SI
- allows Manual block of Low steam line press. SI
Define P-12
LO LO Tave - 550 Tave (2 of 4)
either train will block Steam Dumps
Resets at 551F increasing (3 of 4)
Define P-13
10% turbine power (1 of 2)
- inputs to P-7
- resets at 8% decreasing (2 of 2)
Define P-14
HIGH HIGH SB Level - 90.8 SG NR (2 of 4 any SG)
-Trips turbine
-Trips both MFPs
-FWI
-Prevents starting of the SUFP
resets at 89.8 decreasing (3 of 4 on all SG)
Define C-1
20% IR equiv. Current (1 of 2)
- blocks all manual and auto rod withdrawal
resets are 10% IR equiv. current decreasing (2 of 2)
Define C-2
103% PR (1 of 4)
- Blocks all manual and automatic rod withdrawal
- 1 channel can be bypassed (coincidence is now 1 of 3)
- resets at 101% (4 of 4)
Define C-5
15% Turbine power (1 of 1)
- From PT-505, enables auto rod withdrawal above 15% turbine power
- Resets at 13% and blocks auto rod withdrawal
Define C-7a
15% of greater step change in turbine load or a >7.5%/min ramp decrease for 600 seconds (1 of 1)
- From PT-506, arms steam dump when in Tave mode
- Manually reset by operator
Define C-9
Condenser available
- Better than 25” Hgv (2 of 3) and at least 1 CW Breaker shut.
- Loss of signal will block Steam Dump Operation
Define C-11
223 Steps on Control Rod Bank D
- Prevents auto rod withdrawal beyond 223 steps on control bank D
Define C-16
This interlock blocks any further load set increase and therefore prevents any further opening of turbine control valves. Prevents additional loading of the turbine if either of following conditions are met:
- Auctioneered low Tave is <553F
OR
- Auctioneered low Tave is 20F less that Tref
Define C-20
AMSAC Control Permissive - 20% turbine power (2 of 2)
- Turbine First stage Pressure transmitters, PT-505 and 506 are inputs
- low level setpoint is 13%
- Trips turbine and actuates EFW, does not trip reactor.
