P44 Plant Service Water

Question 1

What are the low flow trips for each well?

Answer 1

Well 1 <1600gpm or recirc <45% open
Well 3 <2000gpm or recirc <45% open
Well 4 <2000gpm or recirc not closed
Well 5 <2000gpm or recirc <45% open
Well 6 <1900gpm or recirc <45% open
*60 second time delay*

Question 2

What are the low oil tank level trips for each well?

Answer 2

Well 1,3,4,5 <3.25”
Well 6 <3.1875”
60 second time delay

Question 3

What are the low well level trips for each well?

Answer 3

Well 1 - A no trip	B 7.7’
Well 3 - C no trip	D 6.2’
Well 4 - J no trip	K 6.5’ (30s TD)
Well 5 - E no trip 	F6.75’
Well 6 - L22.92’	M no trip (1m TD)

Question 4

What will prevent ANY well pump from starting?

Answer 4

1. Low well level
2. Disconnect door open
3. Main isolation switch (disconnect) open
4. Motor thermal overload
5. Power is not available
6. Recirc and discharge valve not full closed (well 4 only)

Question 5

What are the loads off the 12” secondary supply line?

Answer 5

Fire water storage tank
Turbine building sample panel backup
SJAE inter condenser
Mechanical vacuum pump jacket coolers
Makeup treatment clearwell tank
Circ water lube water

Question 6

What’s the loads off the 36” main supply line?

Answer 6

CRAC
CCW heat exchangers
Computer room coolers
Circ water 
SSW head tank 
ADHR
Drywell chillers
Plant chill water
ESF “A” and “B” switchgear room cooler
TBCW

Question 7

If both pumps have been out of service for <24 hours, how long should you run a pump in recirc?

Answer 7

1 pump for 1 hour

Question 8

If both pumps have been out of service for >24 hours, how long should you run a pump in recirc?

Answer 8

1 pump for 24 hours

Question 9

How do louvers respond to fans starting and stopping?

Answer 9

When switch in ON they open/close with fan ON/OFF

When switch is OFF they remain current position

Question 10

What temp will trip the exhaust fans on “fire stat” thermal protection?

Answer 10

120°F

Question 11

What are the power supplies for the radial well?

Answer 11

1,3,6 18AG

4,5 28AG

Question 12

Which pumps are located in each radial wells?

Answer 12

Well 1 A/B
Well 3 C/D
Well 4 J/K
Well 5 E/F
Well 6 L/M

Question 13

Where can PSW be discharged to after loads?

Answer 13

Circ pit or plant discharge basin

Question 14

If plant load is increasing, what will TBCW TCV do? Is it concerned with PSW pressure?

Answer 14

Go open

No