Permissives

Question 1

P-4 Conditions and Functions with Status Light ON

Answer 1

Conditions:
- Both RX Trip Breaker A (B) and Bypass Breaker A (B) Open
Functions:
- Low Tave for FWI
- Seals in FWI from SI or Hi-Hi SGWL
- Permits manual block of auto SI signals

Question 2

P-4 Conditions and Functions with Status Light OFF

Answer 2

Conditions:
- Either RX Trip or Bypass Breaker racked in and closed
Functions:
- Prevents or defeats manual block of SI

Question 3

P-6 Conditions and Functions with Status Light ON

Answer 3

Conditions:
- Any IR NI ≥ 10^-10 amps
Functions:
Permits manual block of SR High Flux Trip

Question 4

P-6 Conditions and Functions with Status Light OFF

Answer 4

Conditions:
- Both IR NI < 6 x 10^-11 amps
Functions:
- Prevents/Defeats manual block of SR High Flux Trip

Question 5

P-7 Conditions and Functions with Status Light ON

Answer 5

Conditions:
- 3/4 PR NI < 10% AND 2/2 Turbine Impulse # <10%
Functions:
- Permits auto block of “At Power” Trips

Question 6

P-7 Conditions and Functions with Status Light OFF

Answer 6

Conditions:
- 2/4 PR NI > 10% OR 1/2 Turbine Impulse # > 10%
Functions:
- Prevents/Defeats auto block of “At Power” Trips with the exception of Turbine Trip

Question 7

P-8 Conditions and Functions with Status Light ON

Answer 7

Conditions:
- 3/4 PR NI ≤ 29%
Functions:
- Permits auto block of Rx Trips due to single loop low flow trips AND Turbine Trip

Question 8

P-8 Conditions and Functions with Status Light OFF

Answer 8

Conditions:
- 2/4 PR NI > 29%
Functions:
- Prevents/Defeats manual block of Rx Trip due to single loop low flow trip AND Turbine Trip

Question 9

P-10 Conditions and Functions with Status Light ON

Answer 9

Conditions:
- 2/4 PR NI ≥ 10%
Functions:
- Permits manual block of:
1) PR High Flux Trip, Low Setpoint
2) IR Trip
3) IR Rod Stop
- Also:
1) Resets P-7
2) Backup De-energization of SR

Question 10

P-10 Conditions and Functions with Status Light OFF

Answer 10

Conditions:
- 3/4 PR NI < 10%
Functions:
- Prevents/Defeats manual block of:
1) PR High Flux Trip, Low Setpoint
2) IR Trip
3) IR Rod Stop
- Also:
1) Inputs to P-7

Question 11

P-11 Conditions and Functions with Status Light ON

Answer 11

Conditions:
- 2/3 PZR # < 1910#
Functions:
- Permits manual block of SI on low PZR #

Question 12

P-11 Conditions and Functions with Status Light OFF

Answer 12

Conditions:
- 2/3 PZR # ≥ 1910#
Functions:
- Prevents/Defeats manual block of SI on low PZR #

Question 13

P-12 Conditions and Functions with Status Light ON

Answer 13

Conditions:
- 2/4 Loop Tave ≤ 541 F
Functions:
- Allows manual block of SI due to low steam line pressure
- High Steam Flow = MSI
- Blocks all steam dumps

Question 14

P-12 Conditions and Functions with Status Light OFF

Answer 14

Conditions:
- 3/4 Loop Tave > 541 F
Functions:
- Prevents/defeats manual block of SI due to low steam line pressure

Question 15

P-13 Conditions and Functions with Status Light ON

Answer 15

Conditions:
- 2/2 Turbine Impulse # < 10%
Functions:
- Input to P-7

Question 16

P-13 Conditions and Functions with Status Light OFF

Answer 16

Conditions:
- 1/2 Turbine Impulse # > 10%
Functions:
- Input to P-7

Question 17

P-14 Conditions and Functions with Status Light ON

Answer 17

Conditions:
- 2/3 SG NR levels < 64% in all 4 SG’s
Functions:
- Allows feeding SG’s

Question 18

P-14 Conditions and Functions with Status Light OFF

Answer 18

Conditions:
- 2/3 SG NR levels > 67% in at least 1 SG
Functions:
- Prevents feeding SG’s by initiating FWI and tripping both MFP’s and Main Turbine