PPS Setpoints

Question 1

Variable Overpower

Answer 1

Safety Channel NI’s 110% Power (Fixed)

9. 7% above steady state (Variable)
10. 6% per minute (Rate of Change) Reactor Trip

Question 2

High Log Power

Answer 2

Middle safety Channel NI

> 10^-2% (bypass permissive at 10^-4%)

Reactor Trip

Question 3

High Local Power Density (LPD)

Answer 3

Originates in CPCs

> 21 kW/ft

Reactor Trip

Question 4

High Pressurizer Pressure

Answer 4

PT-101A-D NR

>2383 psia

Reactor Trip

Question 5

AFAS Lockout

Answer 5

SG1 and SG2 difference > 185 psid

Question 6

Low DNBR

Answer 6

Originates in CPCs

< 1.34

Reactor Trip

Question 7

Low Pressurizer Pressure

Answer 7

PT-102A-D WR

< 1837 psia (variable)

Reactor Trip, SIAS, CIAS

Question 8

Low Steam Generator Pressure

Answer 8

PT-1013A-D (SG1) PT-1023A-D (SG2)

< 960 psia (variable)

Reactor Trip

MSIS

Question 9

Low Steam Generator Water Level

Answer 9

LT-1113A-D (SG1) LT-1123A-D (SG2) WR

< 44.2% Reactor Trip

< 25.8% AFAS

< 20.3% DAFAS

Question 10

High Steam Generator Water Level

Answer 10

LT-1114A-D (SG1) LT-1124A-D (SG2) NR

>91%

Reactor Trip

MSIS

Question 11

High Containment Pressure

Answer 11

PT-351A-D NR

> 3 psig

Reactor Trip

SIAS/CIAS

MSIS

Question 12

High-High Containment Pressure

Answer 12

PT-352A-D WR

> 8.5 psig

CSAS

Question 13

Low Reactor Coolant Flow

(Steam Generator D/P)

Answer 13

PD-115A-D (SG1) PD 124A-D (SG2)

Variable

Reactor Trip

Question 14

Low RWT Level

Answer 14

LT-203A-D

<9.4%

RAS