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
