Seal Steam Flashcards
What valves auto close on Hi-Hi-Hi level at 12” above centerline in seal steam generator?
2 out of 3 Hi-Hi logic F101 - SSG tube side isolation F104 - SSG warm up valve F107 - condensate isolation valve F204 - SSG outlet isolation valve
At what pressure does supply steam swap from equalizing header to #5 HPFWH? and is it manual or automatic?
80 psig
AUTOMATIC
Where does the clean steam leak-off drain to?
Seal steam condenser
Where does the clean seal steam supply come from?
CST via condensate transfer pumps
Where does the seal steam generator drain tank drain to?
4 LPFWH or on high level drain to HP condenser
Where does the seal steam condenser drain to?
HP condenser
Where does contaminated leakoff from RFPT drain to?
HP condenser
What signals auto-close the bleeder trip valves?
Seal steam generator drain tank Hi-Hi level
Hi DP from PDS-K002
Turbine trip signal
test button depressed
What all components are sealed by seal steam?
Main turbine:
a. HP turbine
b. LP turbine
c. HP stop/control valve
d. LP stop/control valve
e. Bypass stop and control valves
RFPT components:
a. RFPT
b. RFPT HP stop/control valve
c. RFPT LP stop/control valve
where does supply steam come from for seal steam generator? (low pressure and high power)
Low power - equalizing header
high power - #5 HPFWH extraction steam
What cools the seal steam condenser?
TBCW
Where does contaminated leak-off from HP turbine return to?
2 LPFWH
Where does contaminated leak-off from LP turbine return to?
back into LP turbine
What pressure is seal steam maintained at entering the RFPT?
3.5 psig
What pressure is seal steam maintained at entering the HP and LP turbines, HP and LP stop and control valves, and bypass stop and control valves?
19.6” water column
