ESW Flashcards
What are the ESW pump auto starts with pump switch in auto?
- Low Header Pressure < 40# (only in Auto)
- SI
- Load Shed
- Opposite unit SI
Will the ESW pump discharge valves automatically open on an auto ESW pump start?
- Yes
Will the ESW pump discharge valves automatically open on a manual pump start?
- Yes
Will the ESW discharge valve auto close on a trip?
- No, they have no automatic closure function
What are the ESW pump trips?
- Load Shed
- Overload/Overcurrent
- Manual
What are the ESW pump power supplies?
- T11/21D East Pump
- T11/21A West Pump
What happens with the ESW to CCW HX outlet valves on a SI?
- 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**
What happens with the ESW to CTS HX outlet valves on a SI with Phase B?
- 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
Will opening the alt ESW supply to the EDG cause the EDG to be inoperable?
- Yes, it will because if you were to have a single failure, you have the potential to lose both trains of cooling
How is the alt ESW supply to the EDG operated?
- Manually only
Which ESW header has the TDAFP emergency suction supply?
- West Header
Which ESW header has the E MDAFP emergency suction supply?
- East Header
Which ESW header has the W MDAFP emergency suction supply?
- East Header
At what temp will the standby ESW room fan start?
- 90°F
When will the selected ESW room fan start?
- On an ESW pump Start
Which units CA supplies both units ESW backwash strainer?
- Unit 1
Describe the Auto actions of the ESW Pp Disch Strainer?
- Automatic backwash of strainers at 86.5” H2O
- And once every 24 hrs on timer
- Backwash for 2 minutes
- Refill 1 minute
What is the max UHS Temp for Unit 1 and Unit 2 per TS 3.7.9?
- 86.9°F
What is the timing for the ESW sequence start on a loadshed w/o SI?
- 7 Seconds
What is the timing for the ESW sequence start on a loadshed with SI or CTS?
- 19 Seconds
At what pressure will the Backup Air Bottles start taking over at for the ESW strainer backwash valves?
- 42#
What are the ESW pump auto starts with pump switch in neutral?
- SI
- Load Shed
- Opposite unit SI
If you get a Unit 2 Train A only SI, what ESW pump(s) will get an auto start signal?
- U2 Train A ESW
- U1 Train B ESW
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?
- U2 W ESW pump will start on Low header pressure @ 40#
When does the ESW normal supply to the EDGs automatically open, if they were not already open
When the EDG run relay energizes at 95% rated speed
How do the ESW normal supply to the EDG valves fail on a loss of power
Fail as is
