P's, C's, & T's Flashcards
1
Q
P-4
A
Rx Trip Permissive
Rx Trip and Bypass Breakers Open
- Trips Main Turbine
- FWIS w/ Low Tavg (564°F)
- Prevents re-actuation of SI after Reset
- Transfers CSDs from Load Reject to Plant Trip
- Arms Steam Dumps
2
Q
P-6
A
Source Range Permissive
IR > 10-10 Amps (1/2)
- Permits Block of SR Trip
3
Q
P-7
A
At-Power Permissive
P-10 or P-13 (1/2)
- Unblocks the following trips:
- PZR High Level
- PZR Low Pressure
- Low Flow in > 1 Loop
- RCP UV
- RCP UF
4
Q
P-8
A
3 Loop Flow Permissive
PR > 48% (2/4)
- Unblocks Low Flow in 1 Loop Trip
5
Q
P-9
A
Turbine Trip - Rx Trip
PR > 50% (2/4)
- Unblocks Rx Trip on Turbine Trip
6
Q
P-10
A
Nuclear at Power
PR > 10% (2/4)
- Feeds P-7
- Blocks SR HV
- Permits Block of:
- IR Trip
- IR Rod Stop
- PR Low Setpoint Trip
7
Q
P-11
A
Pressure SI
< 1970 psig (2/3)
- Permits block of:
- Low Pressure SI
- Low Steam Pressure SI/SLIS
- Enables SLIS on Hi Negative Pstm Rate
8
Q
P-12
A
Low-Low Tavg
550°F (2/4)
- Blocks steam dumps (CSDs)
9
Q
P-13
A
Turbine at Power
Pimp > 10% (1/2)
- Feeds P-7
10
Q
P-14
A
S/G High Level
SG Level > 91% (2/4 LTs on 1/4 S/Gs)
- Trips MFPs
- Trips Main Turbine
- FWIS
11
Q
All Rx Trips
- Trips
- Setpoints
- Coincidence/Interlocks
- Protection
A
12
Q
C-1
A
IR Rod Stop
20% PR Equivalent (IR Amps) - 1/2 IR channels
- Stops outward rod motion
13
Q
C-2
A
PR Rod Stop
103% - 1/4 PR (Can Be Bypassed)
- Stops outward rod motion
14
Q
C-3
A
OTΔT Rod Stop & Runback
OTΔT Trip - 2%: 2/4
- Stops outward rod motion & causes turbine runback
15
Q
C-4
A
OPΔT Rod Stop & Runback
OPΔT Trip - 2% on 2/4
- Stops outward rod motion and causes turbine runback
