NI detectors and Permissive

Question 1

P-10
Coincidents

Answer 1

Going up 2/4 PR NIs above 10%, going down 3/4 below 10%

Question 2

P-10 Does what?

Answer 2

1. When moving up in power, allows manual defeat of IR rod stop and reactor Trip, allows manual defeat of PR reactor trip (low set point 24%) and auto de-energizes SR NI’s
2. When moving down, automatically unblocks IR reactor trips, PR reactor trip (24%) and defeates the auto block of SR NI’s

Question 3

P-8
Coincident

Answer 3

2/4 PR above 40%
3/4 PR below 40%

Question 4

P-8 Does what?

Answer 4

Enables/Disables Low Flow Reactor trip in a single loop, and turbine trip

Question 5

P-7
Coincident

Answer 5

2/4 PR above 10% (from p-10) OR 1/2 First stage Turbine pressure above 10% ~68psig

3/4 PR below 10% (from p-10) AND 2/2 First stage turbine pressure below 10% ~68psig

Question 6

P-7 does what?

Answer 6

Enables/Disables @ power reactor trips
1. RCS Low Flow
2. RCP Breakers open
3. UV on RCP breakers
4. PZR low pressure
5. PZR high lvl

Question 7

P-6
Coincident

Answer 7

1/2 IR above 10^-10amps
2/2 IR below 10^-10amps

Question 8

P-6 does what?

Answer 8

Allows denergizing the SR and block of SR reactor trip

Automatically reenergizes the SR and reinstates the SR reactor trip

Question 9

Source Range Detectors
range, Power supplies

Answer 9

N-31/32
IB-1/2
10° to 10^6 CPS

Question 10

Intermediate Range Detectors
range power supplies

Answer 10

N-35/36
IB-1/2
10^-11 to 10^-3amps

Question 11

Power Range Detectors
Range, Power supplies

Answer 11

N-41,42,43,44
IB-1/2/3/4
0-200%

Question 12

Accident Monitors
Range, Power supply

Answer 12

N-51,52
IB-1or DS 120/ IB-8
SR-10^-1 to 10^5 CPS
WR- 10^-6amps to 200%

Question 13

IR rod stop conicidence and setpoint?

Answer 13

1/2 IR, at 20% CE

defeated with P-10

Question 14

PR rod stop conicdence and setpoint?

Answer 14

1/4 PR at 103%