PLCS and PPCS Setpoints

Question 1

Hi Level Error

Answer 1

+8.5% Rising - Alarm

+ 8.2% Decreasing - Alarm Reset

Question 2

Low Level Error

Answer 2

• 3.5% Decreasing - Alarm
• 2.7% Rising - Alarm Reset

Question 3

Pressurizer Level Hi-Lo Alarm

Answer 3

Hi Alarm @ 60%

Lo Alarm @ 25%

Question 4

Normally Running Charging Pump Level Deviation

Answer 4

+15% Rising - Normally Running Pump Stops

+14% Decreasing - Normally Running Pump Restarts

Question 5

Backup Heater Level Deviation

Answer 5

+3% Rising - Hi Level Deviation, B/U Heaters ON

+2.5% DEcreasing - Hi Level Deviation Reset, B/U Heaters OFF

Question 6

Standby Pump Level Deviations

Answer 6

• 14% Rising - Standby Pump Stops
• 23% Lowering - Standby Pump Starts

Question 7

PLCS Letdown Flow Limits A/M

Answer 7

Auto Controls 30-135 gpm (with lag in output)

Manual Controls 0-150 gpm

Question 8

Pressurizer Pressure Hi-Lo Alarm

Answer 8

Hi Alarm @ 2285 psia

Lo Alarm @ 2160 psia

Question 9

Proportional Heater Interlocks

Answer 9

< 25% pressurizer level - OFF

Must be manually reset (flagged) @ 27%

> 2285 psia - OFF

Question 10

PZR Backup Heaters Interlocks

Answer 10

<25% level OFF

> 2285 psia OFF

SIAS

Question 11

B/U Heater Control

Answer 11

<2200 psia - ON

+3% rising level deviation - ON

>2225 psia - OFF (unless in setpoint override)

+2.5% lowering level deviation - OFF

Question 12

PPCS Master Controller Range

Answer 12

0% - Prop Htrs Full ON

16. 5% - Normal Position - Prop Htrs ~50% ON
17. 5% - Prop Htrs OFF, Spray Valves Closed (Start Opening)

50% - Spray Valves FULL OPEN