1
Q
Purpose of system
A
- supplies sufficient cooling water to the condensers to condense the turbine exhaust steam during all phases of plant operation.
- Additional flow for control of lake temperature
2
Q
Flow path
A
- Lake
- Traveling screens
- Cir Pumps A/B/C
- V6-50A/B/C (Discharge valve)
- Discharge Header
- Water boxes inlets (condenser)
- water boxes outlets (condenser)
- discharge cannel
- Lake
3
Q
Traveling screens
Spray water supplied by?
Power supply?
A
- Service water (SW)
- MCC-7 (intake)
4
Q
Cir Water Pumps A/B/C
Power supplies
Seal water can be provided by?
A
- 4Kv1,4,5
- Service water or U1 potable water (deepwell)
5
Q
Circ Water Pump Seal psi and flow rate required for start
A
- Must have 4psig and 10gpm to start pump.
- Will not trip pumps if already running and psi/Flow rate drop below this
6
Q
V6-50A/B/C
Circ Water pump Discharge Valve
Power supplies?
Interaction with pumps
A
- MCC-7 (intake)
- Opens 20% before associated pump will start, after pump is running the valve will fully open.
- Closes to 20% before associated pump will stop, then continue to fully close.
- Last pump to stop specials rules.
7
Q
Special rule for the last Cir Water stopping
A
-Pump stops immediately, associated valve stays fully open for 1.5 minutes and then travels fully closed.
