Secondary Flashcards
Describe flow path between SGs and condenser
Leaves the SGs
Joins at common header
Goes through control and isolation valves
HP turbine
MSR
LP turbine
How many MFW pumps at HFP and what provides power?
Where does flow come from and what percent from each?
2
Steam driven
40% flow from heater drains
60% flow from condensate
Is there any FW heating after a trip?
No because you lose extraction steam
Components between SG and and header
Flow transmitter
Pressure gauge
PORV
Safeties
MSIV
How many SGs power the TDAFW?
Which are they?
SG B and C
What causes steamline isolation?
If > P11, low streamline P
If < P11, steamline negative rate
Hi-2 containment P
FW pressure measurements
Venturi for FW flow
FW discharge P
Speed control dP
Steamline P measurements
(per SG and header)
Per SG
P for density compensation for steam flow
Steamline isolation
Header
Steam dump P mode
FW speed control dP
SIS
Condenser to SG
Condenser
Condensate pumps
Condensate polishing
LP heaters
MFW pumps
HP heaters
Control valve
Venturi
Isolation valve
How many condensate pumps are needed?
3
What goes to the heater drain tanks?
HP FW heaters
MSR
How many heater drain pumps are there and at what reactor power are they required?
2
40%
How many AFW pumps and where do they discharge?
2 MD and 1 TD
A to B and C
B to A and D
TD to all 4
How much decay heat can each AFW pump remove?
MD: 100% each
TD: 200%
What will initiate MDAFW?
SG lo-lo on 2/4 of 1/4 (caused by a trip)
Trip of both MFW pumps
(and either sequencer)
