ESW

Question 1

What are the ESW pump auto starts with pump switch in auto?

Answer 1

• Low Header Pressure < 40# (only in Auto)
• SI- Load Shed
• Opposite unit SI

Question 2

Will the ESW pump discharge valves automatically open on an auto ESW pump start?

Answer 2

Yes

Question 3

Will the ESW pump discharge valves automatically open on a manual pump start?

Answer 3

Yes

Question 4

Will the ESW discharge valve auto close on a trip?

Answer 4

No, they have no automatic closure function

Question 5

What are the ESW pump trips?

Answer 5

• Load Shed
• Overload/Overcurrent
• Manual

Question 6

What are the ESW pump power supplies?

Answer 6

• T11/21D East Pump
• T11/21A West Pump

Question 7

What happens with the ESW to CCW HX outlet valves on a SI?

Answer 7

Go to pre-determined throttle position of approx 5000 gpm

can be re-positioned with Ctrl Switch after they reach preset position

Question 8

What happens with the ESW to CTS HX outlet valves on a with a cts signal and on recirc sump?

Answer 8

After on recirc sump, Go to pre-determined throttle position of approx. 2400 gpm

(CTS Signal with ICM-305 or 306 Recric Sump Valves open)

Question 9

Will opening the alternate ESW supply to the EDG cause the EDG to be inoperable?

Answer 9

Yes, because if you were to have a single failure, you have the potential to lose both trains of cooling

Question 10

How is the alternate ESW supply to the EDG operated?

Answer 10

Manually

Question 11

Which ESW header has the TDAFP emergency suction supply?

Answer 11

West Header

Question 12

Which ESW header has the E MDAFP emergency suction supply?

Answer 12

East Header

Question 13

Which ESW header has the W MDAFP emergency suction supply?

Answer 13

East Header

Question 14

At what temp will the standby (even numbered) ESW room fan start?

Answer 14

90°F

Question 15

When will the odd numbered ESW room fan start?

Answer 15

On the pump Start

Question 16

Which units CA supplies both units ESW backwash strainer?

Answer 16

Unit 1

Question 17

Describe the Auto actions of the ESW Pp Disch Strainer?

Answer 17

Automatic backwash of strainers:
- at 86.5” H2O DP
- every 24 hrs on timer

Question 18

What is the max UHS Temp for Unit 1 and Unit 2 per TS 3.7.9?

Answer 18

86.9°F

Question 19

At what pressure will the Backup Air Bottles start taking over at for the ESW strainer backwash valves?

Answer 19

42#

Question 20

What are the ESW pump auto starts with pump switch in neutral?

Answer 20

• SI
• Load Shed
• Opposite unit SI

Question 21

If you get a Unit 2 Train A only SI, what ESW pump(s) will get an auto start signal?

Answer 21

• U2 East ESW Pump
• U1 W ESW Pump

Question 22

You have the ESW crossties open with both units E ESW pumps running and both W ESW pumps in standby. If your E ESW pump on Unit 1 trips out on instantaneous overcurrent, what will happen?

Answer 22

U2 W ESW pump will start on Low header pressure @ 40#

Question 23

Is the auto start function of the ESW pump from a SI required for Operability?

Answer 23

YES!!! PER SR 3.7.8.3