Circ Water Flashcards
What are the circ water pump permissives?
HP outlet F011A/B full open
Lube water > 10 gpm
Discharge F002A/B full closed
Lock-out reset
What are the circ water pump trips?
Motor protection
6.9kv undervoltage
Discharge valve full closed (bypassed for 30 seconds after pump start)
What is the purpose of circ water?
removes heat from main condenser
What’s the purpose of lube water?
lubes shaft bearings
What’s the primary and backup suction sources to lube water?
Primary - pump discharge
backup - PSW
What happens when high cooling tower basin level occurs?
F502 opens to divert water to plant discharge
What happens when F502 opens or closes?
opens (diverts to plant discharge basin)
close (diverts to circ water pit)
What effect does opening/closing F512 have on PSW pressure?
Open: discharge pressure goes down
close: discharge pressure goes up
What valves are the blowdown valves?
F513A/B
What’s the primary supply for circ water pump motor thrust bearing cooling?
PCW
What’s the backup supply for circ water pump motor thrust bearing cooling?
backup pump discharge
What occurs when stop push button is depressed to secure pump?
Discharge valve closes then pump trips
What will happen if pumps are run in single pump dual train with ACT valved in?
Risk of pump run-out
What’s the power supplies to the ACTs?
19UD from BOP 14
What needs to be monitored while securing ACTs while plant is at power?
Condenser vacuum
