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1. Systems > ESW > Flashcards

ESW Flashcards

1
Q

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

A
  • Low Header Pressure < 40# (only in Auto)
  • SI
  • Load Shed
  • Opposite unit SI
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2
Q

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

A
  • Yes
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3
Q

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

A
  • Yes
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4
Q

Will the ESW discharge valve auto close on a trip?

A
  • No, they have no automatic closure function
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5
Q

What are the ESW pump trips?

A
  • Load Shed
  • Overload/Overcurrent
  • Manual
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6
Q

What are the ESW pump power supplies?

A
  • T11/21D East Pump

- T11/21A West Pump

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7
Q

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

A
  • ESW to CCW HX outlet valves go to pre-determined throttle position of approx 5500 gpm
  • CCW Hx outlet valves can be re-positioned with Ctrl Switch after they reach their SI preset position**
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8
Q

What happens with the ESW to CTS HX outlet valves on a SI with Phase B?

A
  • CTS HX outlet valves go to pre-determined throttle position of approx. 2400 gpm (CTS Signal with ICM-305 or 306 Recric Sump Valves open)
  • Don’t need it until on Recirc sump
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9
Q

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

A
  • Yes, it will because if you were to have a single failure, you have the potential to lose both trains of cooling
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10
Q

How is the alt ESW supply to the EDG operated?

A
  • Manually only
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11
Q

Which ESW header has the TDAFP emergency suction supply?

A
  • West Header
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12
Q

Which ESW header has the E MDAFP emergency suction supply?

A
  • East Header
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13
Q

Which ESW header has the W MDAFP emergency suction supply?

A
  • East Header
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14
Q

At what temp will the standby ESW room fan start?

A
  • 90°F
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15
Q

When will the selected ESW room fan start?

A
  • On an ESW pump Start
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16
Q

Which units CA supplies both units ESW backwash strainer?

A
  • Unit 1
17
Q

Describe the Auto actions of the ESW Pp Disch Strainer?

A
  • Automatic backwash of strainers at 86.5” H2O
  • And once every 24 hrs on timer
  • Backwash for 2 minutes
  • Refill 1 minute
18
Q

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

A
  • 86.9°F
19
Q

What is the timing for the ESW sequence start on a loadshed w/o SI?

A
  • 7 Seconds
20
Q

What is the timing for the ESW sequence start on a loadshed with SI or CTS?

A
  • 19 Seconds
21
Q

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

A
  • 42#
22
Q

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

A
  • SI
  • Load Shed
  • Opposite unit SI
23
Q

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

A
  • U2 Train A ESW

- U1 Train B ESW

24
Q

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?

A
  • U2 W ESW pump will start on Low header pressure @ 40#
25
Q

When does the ESW normal supply to the EDGs automatically open, if they were not already open

A

When the EDG run relay energizes at 95% rated speed

26
Q

How do the ESW normal supply to the EDG valves fail on a loss of power

A

Fail as is

1. Systems (56 decks)

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