Service Water System (SWP) Flashcards
What is the min flow to the discharge bay and why?
3500 gpm to keep the candy canes full.
When should Service Water Pumps be tripped?
If flow < 500gpm or 500-1000 gpm for 15 min.
What are the Service Water Pump Limits?
Need to stay…
1. >2500 gpm
2. <10k gpm
3. <76 amps
What position do FV47/54 fail on a loss of air or power?
Fail Closed
What is the max flow through FV47/54 to the CWS Basin?
25,000 gpm max.
Opening too far can drain the SWP return to the discharge bay: Water Hammer
What valves auto close in the discharge bay and when?
MOV30A/B on 275’ in the discharge bay.
What level does overflow start into the intake?
279’ (MOV30A/B auto close at 275’)
What valves auto open in the discharge bay and when?
MOV77A/B at 234’
Are MOV77s in series or parallel?
Parallel
Are MOV30s in series are parallel?
Series
What is the timing sequence of SW pump restarts after EDG takes over the bus on a LOOP?
32 - red
5 - red
5 - red
6 - green
6 - green
7 - green
What is T.S. for operable intake heaters?
14 intake heaters per division shall be operable <=38F
What is the absolute MAX SW flow through RHR HXs and why?
7400 gpm max due to tube vibration
What could happen on a fire in Zone 803NZ Screenwell General Area?
Could prevent automatic opening of 2SWPMOV77A or 2SWPMOV77B
What does Appendix R do in regard to SWP?
Will only close Div 1 Non-Essentials
What d/p do traveling screen start in slow?
4” d/p
What d/p do traveling screen start in fast?
6” d/p
When does traveling screen wash auto secure?
When D/P drops to < 3” wash continues for 20 min then shuts down
When do SW pump discharge strainers start an auto backwash?
10 psid
How long is SW pump manual operation locked out following bus restoration?
70 sec
