EMERGENCY FEED Flashcards
OTSG level control valves (EF-V-30A/B/C/D)
Power supply
EF-V-30A/C -> VBA
EF-V-30B/D -> VBB
OTSG level control valves (EF-V-30A/B/C/D)
Failure position
Closed on loss of air and DC
EFW Block Valves (EF-V-52A/B/C/D)
Location, purpose
Located downstream of the EF-V-30s. manual isolation for EF-V-30s for EF-V-30s if they fail OPEN.
EFW Nozzles
Number per OTSG, purpose
7 per OTSG
Elevates thermal center of OTSG to promote establishment of natural circulation and reduces thermal stress on the lower tubesheet.
EF-P-2A
EF-P-2B
Power supply
1D 4kv ES bus
1E 4kv ES bus
Emergency Feed Pump
Start signals
Loss of all 4 RCPs (50% op range)
Loss of both fd pumps (<75 psig oil press) (25 S/U range
4# RB press 2/4 ( 25 S/U range)
10 OTSG level (25 S/U range)
MS-V-13 A Opens first then what? Why?
53 second time delay on opening on MS-V-13B
Prevents overspeeding turbine
Ms-V-13s
Loss of DC power and loss of air failed position?
Fail Open
MS-V-10s
Used for low steam supply pressure conditions, IF both OTSGs < what pressure and aux steam not available
Jog MS-V-10A and 10B to maintain > what RPM
<200 psig
>3300 RPM
When in local, thumb wheel automatically controls OTSG level to desired setpoint. What does the right black needle indicate?
Indicates local setpoint
Header Cross-connects (EF-V-1A/B, EF-V-2A/B)
Bkrs left what position at power? (app R)
EF-V-1A bkrs left OPEN at power
Pump min recirc valves (EF-V-8s)
Blocked what?
Blocked OPEN (not seismically qualified)
Reactor River B/U supply valves (EF-V-4/5)
1C ESV MCC
Block loading
Block 1 topic and loads (5 things)
Injection
HPI pumps
LPI pumps
Valves for core cooling
Rx river valves
TRIP RB Cooling Fans
Block loading
Block 2 topic and loads (2)
Cooling
RB cooling fans (AH-E-1A/B/C) restart in slow
Rx river pumps
Block loading
Block 3 topic and loads (4)
Closed Cooling
NR
NS
DR
DC pumps
Block loading
Block 4 topic and loadings (3)
Spray
BS-P-1A/B start permissive
AH-E-15A/B
AH-E-27A/B
Block Loading
Block 5 topic and loading (2)
EFW
EF-P-2A/B Start
EF-V-30s align to HSPS demand
Steam binding of EF-P-1
High temps on pump suction or discharge > what pressure, discharge pressure < OTSG pressure, and pump speed > what RPM
> 200F
3500 RPM (spinning but no flow)
Block Loading/EF-P-2
Actuation T=
Pump Start T=
Full Flow T=
Actuation (t=0) HSPS received
Start (T=5 sec) EF-P-2A/B start
Full Flow (t=15 sec) full pump Flow achieved
EF-P-1 Sequence
How much time to EF-P-1 Full flow following HSPS actuation
40 seconds
Scenario
HSPS ONLY
5 second TD + 10 seconds for full flow = 15 seconds
Scenario
LOOP
10s EGY + 15s above = 25 seconds
Scenario
ESAS
15s block 4 start permissive + normal 15s = 30 seconds
Scenario
LOOP + ESAS
10s EGY + 15s Block 4 permissive + 5s TD + 10s = 35 seconds
Limits and precautions
Do NOT allow EF-P-2A/B to exceed what flow and why?
To exceed 600 gpm to prevent motor damage/runout
Limits and precautions
Do NOT allow EF-P-1 to exceed how much flow and why?
Exceed 1050 gpm to prevent runout
Tech spec
3.0.1
And all actions requiring S/D are SUSPENDED until
2 EFps and 1 flowpath is OPERABLE
Motor driven emergency feed pumps
EF-P-2A/B
Start permissive
ESAS block 4 +5 sec TD
EF-P-2A/B
Auto starts on?
HSPS
EF-P-2A/B
69 switches at the 1D and 1E 4kv busses allow for what?
Remote operation of pumps
Tech specs
3.4.1.1 is what?
EF-Ps and 2 flowpaths operable with 2 EFPs powered from an OPERABLE emergency bus and 1 EFP capable of being powered from 2 OPERABLE MS supply paths
Tech specs
3.4.11 A1
With 1 MS supply Inoperable restore in how long or be in what in how long?
Restore in 7 days or be in CSD in 12 hours
Tech specs
3.4.1.1 A2
With 1 EFP or flowpath INOPERABLE restore in how many days or be in what in how long?
72 hours or be in CSD in 12 hours
Tech specs
3.4.1.1 A3
With 1 MS path and 1 motor driven EFP INOPERABLE, restore how many of how many in how long? Or be in what in how long or what in how long?
Restore one of the two in 24 hours, or be in HSD in 6 hours and CSD in 12 hours
Tech specs
3.4.1.1 A4
With > how many EFP or both flow paths inoperable, initiation action to restore immediately?
> 1 EFP
Tech specs
3.01
Spec 3.01 and all actions requiring S/D are SUSPENDED until 2 EFPs and 1 flowpath operable.
EFW water sources
1-4 in order
CST
Hotwell
Million gallon tank (DW-T-2)
River water via EF-V-4/5
EFW water sources
Hotwell caviates
Condenser vacuum must be broken AND <5ft CST
EFW water sources
If hotwell is ruptured (vacuum broken) and CSTs have been exhausted, DW-T-2 is NOT immediately available even if it is full. EF-P-2A/B suction pressure is <2# and cavitating what to do immadiatley?
Shit to reactor river
How many EFW pumps, driven how?
2 motor driven
1 steam driven
Tech spec
Need how many gallons in CST?
150,000 gallons each
