Card Set Information
charging advanced systems
What closes CV-2009 (CVCS containment isolation valve)?
What happens to boric acid recirc valve on SIS?
Recieves a close signal
Where does the VCT vent to?
Waste gas surge tank
Charging pump suction sources?
Spent fuel pool
Gravity feed from BASTs
Boric acid pumps from BASTs
PS-0220/0221, letdown pressure downstream of orifices
Sends close signals to SV-2002A/B, letdown orifice bypass valves, at 500 psig
EK-0735 "Charging lo flow"
25 gpm from FIA-0212 (charging flow indicator)
FIA-0212 also starts P-55B (normal and DBA sequencer) at 25 gpm
What does TICA-0204 (letdown flow local temperature controller indicator) do?
Sends a close signal to CV-2014 (now closed)
-CV-2014, failed fuel monitor isolation valve
Sends bypass signal to CV-2023 (IX bypass)
-prevents damaging/melting IX resin
Alarms and actuates at 130
TIA-0202 (Relief valve RV-2006 outlet temperature indicating alarm)
Indicates when RV-2006 lifts or leaks
F setpoint for the alarm
What temperature is TIC-0203 (letdown temperature controller) normally set at?
Purpose of the Chemical volume control system?
Maintain the required volume of water in the PCS over the range of full to zero reactor power with out requiring makeup
Maintain the chemistry and purity of the PCS
Maintain the desired boric acid concentration in the PCS
Pressure test the PCS
When does CV-2023, demin bypass valve, bypass the demins?
When in auto it bypasses at 130
F to protect the demins
What is the problem with transferring CV-0202 and CV-1212 between HIC-1212 and PIC-0202?
Can cause intermediate pressure letdown pressure variations and possible lifting of the letdown relief valve
Charging pump power supplies
-can be supplied from LCC-11 through P-55C breaker
--all interlocks and permissives are maintained
-can recieve alternate power from LCC-13
--lose all interlocks and permissives
Modes of operation for PIC-0202 (Intermediate pressure letdown controller)
-controls via input from PT-0202
Boric Acid Tank alarms
100% high level
20% low level
2.1% low low level
94.5% common low level alarm (118")
High temperature 170
Low temperature 150
E-56 Regenerative Heat Exchanger
Cooled by charging discharge
Designed to maintain letdown outlet temperature <450
F with max letdown and minimum charging
Design/purpose of T-54 VCT
Sized to accomodate a zero to full power rise with out diversion and a full to zero power lowering with out makeup
Maintained between 68%-78% and 21-35 psig
CV-2056 (diverting valve)
3 position handswitch VCT/AUTO/TO CWRT
When in auto it will divert letdown to the CWRT at 94.4% VCT level, when at 91.4% VCT level it diverts back to the VCT
How many gallons/% in the VCT?
EK-1512 (Purification filter high differential pressure)
alarms at 35 psid on C-40
What is the purpose of HS-0202 (on C-12)?
Determines which control valve is controlled by PIC-0202 or HIC-2122
CV-2122 manual/CV-2012 auto
-CV-2122 is controlled by HIC-2122 and CV-2012 is controlled by PIC-0202
CV-2122 auto/CV-2012 manual
-CV-2122 is controlled by PIC-0202 and CV-2012 is controlled by HIC-2122
CV-2002, letdown orifice bypass valve, operation
2 solenoid valves SV-2002A/B
When in auto
-SV-2002A will close if either
--500 psig on PS-0220 (intermediate letdown pressure)
--190 psig on PS-0222 (letdown pressure) to protect demins
-SV-2002B will close if either
--500 psig on PS-0221 prevents opening RV-2006
--160 gpm on FIC-0202 (letdown flow indicator controller)
---excess flow will channel demins
RV-2013, low pressure letdown line safety relief valve, setpoint
Relief valve discharges to the VCT
EK-0704, letdown heat exchanger tube inlet, Hi-Lo pressure
-high pressure at 500 psig
-low pressure at 400 psig
VCT low low level
At 7.9% (VCT lo-lo level alarm)
-close MO-2087 (VCT outlet)
-open MO-2160 (SIRWT outlet)
-close MO-2155, Makeup stop
At 10.8% after a lo-lo level
-clears lo-lo alarm
-can swap charging pump suctions
Charging pump starts
P-55B and P-55C (if in auto) on low PZR level
SIAS with standby power available
-all 3 pumps start
SIAS and standby power not available
-P-55A and P-55C start at 2 seconds
-P-55B starts if FIA-0212 doesn't see 25 gpm
CV-2001 letdown isolation valve
Isolates letdown on high temperature of 470
F when in auto
What are the power supplies for boric acid pumps?
TICA-0201, letdown temperature indicator
Alarms at 460
Isolates letdown at 470
MOV-2087 VCT outlet valve power supply and auto closure
-VCT lo lo signal 7.9%
What is the setpoint for RV-2006, letdown line relief valve, and where does it relieve to?
Lifts at 600 psig to protect the letdown line and components
Relieves to the quench tank
CV-2002, CV-2202 (letdown orifice bypass valves)
Used during PCS low pressure operations to raise letdown flow when there is not enough PCS pressure to force letdown through the orifices.
EK-0740 "charging pumps discharge lo pressure"
Alarms at 2000 psig
EK-0706 "letdown hx cooling excess flow"
Alarms at 14 psid
DPC-0909 letdown HX CCW differential pressure controller limits CV-0909 opening to <12 psid
What is the purpose of CV-2012, 2122 (Intermediate letdown regulating valves)?
Prevents flashing of the letdown fluid prior to being cooled by the letdown heat exchanger
Normal setpoint is 460 psig
Controls PCS pressure during solid plant ops
EK-0734 "charging pump seal cooling low pressure"
Alarms when the charging pump seal pressure is <5 psig and the charging pump breaker is closed.
What are the charging pump trips?
Low suction pressure
Low lube oil pressure
P-55B and C on high pressurizer level
P-55A on fluid drive at 150
What are the VCT alarms?
VCT high temperature
VCT level alarm
VCT pressure alarm
MOV-2170/MOV-2169 boric acid tank gravity feed isolations
Powered from MCC-1
Has blue overload light
Recieves an open signal from SIS
At what pressure/flow does CV-2002, letdown orifice bypass valve close and why?
Closes at 190 psig to protect demineralizers
Closes at 160 gpm (alarm)
500 psig prior to the letdown heat exchanger