EMERGENCY FEEDWATER Flashcards
(20 cards)
What is the maximum flow rate for EF-P-2A/B and EF-P-1 to avoid damage?
EF-P-2A/B: 600gpm, EF-P-1: 1050gpm.
What happens to EF-V-30s on loss of control power or air?
EF-V-30s CLOSE to prevent overcooling.
What does the AUTO light on the EF-V-30 controller indicate?
It indicates controlling level.
How long can >1 EFP or both flowpaths to a single OTSG be INOP during surveillance?
Up to 8 hours if 1 EF-P-2 remains OPERABLE and a designated operator is stationed nearby.
What is the minimum required CST volume per tank?
> 150,000 gallons.
What is the function of MS-V-13A/B during EFW actuation?
MS-V-13A opens immediately, MS-V-13B opens after a 53-second time delay to prevent overspeed.
What are the EFW sources?
- Condensate Storage Tanks, 2. Hotwell, 3. Million Gallon Tank, 4. Reactor River.
What action is required if EF-P-2A/B suction pressure drops below 2# and cavitation occurs?
Immediate transfer to Reactor River.
What is the sequence for hotwell supply of EFW?
CO-V-6 CLOSES, CO-V-7 CLOSES, CO-V-8 OPENS after vacuum is broken.
How long does it take EF-P-2s to reach full flow after actuation?
10 seconds.
What is the function of EF-V-8s?
Min Recirc Valves, blocked OPEN for pump protection, recircs to “B” CST.
What is the total time for EF-P-1 to reach full flow after HSPS and LOOP + ESAS actuation?
40 seconds.
What happens to OTSG level indication at 4# HSPS?
It becomes inaccurate, indicative of LOCA, MSLB, or FWLB inside RB.
How does EFW flow change post-trip on LOOP?
Less EFW is required due to no RCP pump heat.
What must be done if VBA/VBB is lost?
Respective EF-P-2 must be started manually; no EF-V-30 auto control via Foxboro.
What are the signs of EF-P-1 steam binding?
High temps on suction/discharge >200F, discharge pressure < OTSG pressure, pump speed >3500rpm.
Can plant startup continue past 250F if EF-P-1 is declared INOPERABLE?
No, startup cannot continue past 250F.
What action is required if EF-P-2B is OOS and EG-Y-1A is INOPERABLE?
Enter 3.0.1 per T.S. 3.7.2 (Electrical).
How is actual EFW flow to OTSGs normally obtained?
By RSD indicators.
What happens during chest warming with a steam leak in IB on “A” OTSG?
“A” OTSG will have MFW isolation, EFW feeds faulted OTSG (boils dry), “B” OTSG MFW flow falls to 0, EFW maintains @ 25”.
