Circ Water

Question 1

What are the CW Pump Trips?

Answer 1

• Manual
• Overload
• instanteous Overcurrent
• Undervoltage on the associated RCP Bus

Question 2

What is the De-icing flowpath?

Answer 2

• From a single unit discharge vault (WMO-16 or -26), through the de-ice tunnel and out the middle intake tunnel (WMO-30 is closed).

Question 3

What are the indications of icing?

Answer 3

• Circulating Water temperature ≤ 35°F.
• 1 Foot of drawdown in the Forebay not caused by starting a CW Pump
• Traveling screens high and/or extreme high differential pressure alarms are annunciating with little or no trash collection in the screen wash trash

Question 4

What systems support the CW System?

Answer 4

• Chlorine Injection
• Miscellaneous Sealing and Cooling Water
• Screen Wash System
• Vacuum Priming
• 250v DC

Question 5

What are the CW System loads?

Answer 5

• Main Condensers
• FP Condensers
• TACW Hx
• TRS Overflow
• Radiological Liquid Waste
• Lawn Sprinkler (Discharge Hdr)
• Chlorine Injection (Discharge Hdr)
• NESW (normal: intake hdr, backup: discharge hdr)
• MSCW

Many 
Fishies
Took 
Their 
Ridiculous 
Lives 
Causing 
Needless 
Migranes

Question 6

What does T.S. 3.7.9, Ultimate Heat Sink, State?

Answer 6

• To meet this condition, the UHS temperature limit of ≤ 86.9°F and the level should not fall below the level necessary for normal unit operation.

Question 7

When do the CW outlet valves auto open?

Answer 7

• They auto open with associated CW pump auto start to prevent pump runnout

Question 8

Will CW outlet valves auto open on a manual CW pump start?

Answer 8

• No, you must manually open the CW outlet valves on a Manual CW Pump start. This prevents pump runout

Question 9

When do the CW outlet valves auto close?

Answer 9

• Auto close on associated CW pump breaker opening. - Prevents short cycling the system

Question 10

When will a CW pump auto start?

Answer 10

• With the CR Switch in Auto, the CW Pump will auto start on a failure of a running CW Pump. (Running CW control switch in Run with the breaker open.)

Question 11

What are the CW pump power supplies?

Answer 11

• 1D(2D) / CW Pump #11(21)
• 1A(2A) / CW Pump #12(22)
• 1B(2B) / CW Pump #13(23)
• 2C / CW Pump #24

Question 12

When do the screen wash pumps auto start

Answer 12

On timer or differential level.

On a dP start the setpoint is variable and will run until dP is less than 4” for 5 seconds + 5 minutes

Question 13

At what dP do the screens reach their maximum speed

Answer 13

25” H2O