CIRC WATER Flashcards
1
Q
What are the CW Pump Trips?
A
- Manual- Overload- instanteous Overcurrent- Undervoltage on the associated RCP Bus
2
Q
What is the De-icing flowpath?
A
- 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).
3
Q
What are the indications of icing?
A
- Circulating Water temperature ≤ 35°F.- Frazzle Ice- > 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
4
Q
What systems support the CW System?
A
- Chlorine Injection- Miscellaneous Sealing and Cooling Water- Screen Wash System- Vacuum Priming- 250v DC
5
Q
What are the CW System loads?
A
- NESW- Chlorine Injection (x-tie header)- Miscellaneous SealingCooling Water (x-tie header)- Lawn Sprinkler System (x-tie header)- TACW Heat Exchanger- Main Condensers- Feed Pump Condensers- Radiological Liquid Waste- Turbine Room Sump- Overflow
6
Q
What does T.S. 3.7.9, Ultimate Heat Sink, State?
A
- To meet this condition, the UHS temperature limit of ≤ 88.8°F and the level should not fall below the level necessary for normal unit operation.
7
Q
When do the CW outlet valves auto open?
A
- They auto open with associated CW pump auto start to prevent pump runnout
8
Q
Will CW outlet valves auto open on a manual CW pump start?
A
- No, you must manually open the CW outlet valves on a Manual CW Pump start. This prevents pump runout
9
Q
When do the CW outlet valves auto close?
A
- Auto close on associated CW pump breaker opening. - Prevents short cycling the system
10
Q
When will a CW pump auto start?
A
- 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.)
11
Q
What are the CW pump power supplies?
A
- 1D(2D) / CW Pump #11(21) - 1A(2A) / CW Pump #12(22) - 1B(2B) / CW Pump #13(23) - 2C / CW Pump #24
