CVCS Flashcards
CHN-V532 valve type, location, purpose?
AOV, 70 foot aux blg, air isolated open to prevent inadvertently isolating boration flowpaths.
What are the charging pump pulsation dampeners at?
Inlet-19 pounds Discharge-1500 pounds
What is the OE associated with CH-V327?
Was accidentally left closed while swapping charging pump suction to the RWT.
What causes valve 515 to automatically close?
SIAS or High Regen HX outlet temp of 413 degrees F
What causes valve 516 to automatically close?
SIAS or CIAS
What causes valve 523 to close?
CIAS or HIGH LDHX outlet temp of 135 degrees F.
What do valves 515, 516, and 523 do on a loss of power and/or air?
Fail Closed
Where do the letdown pressure relief valves relief to?
Equipment Drain Tank
What is the purpose of the backpressure control valves?
Maintain 350-375 psig upstream of valves to prevent flashing in the LDHX.
Maintain 40-95 psig downstream to prevent component damage.
How do the backpressure control valves fail?
Fail closed. Also close on High LDHX outlet temp of 148 degrees F.
When must we change the purification filters?
When the Delta-P is 25 pounds at 72 gpm or 5R/hr.
What kind of resin is in the deborating IX?
Anion only
What is the location of the VCT?
120’ Aux Building
Where do we get seal water for the charging pumps?
RMW header
How long can we run a charging pump without seal water?
50 hours
What is the motive force for Auxiliary Spray?
Charging pumps. (6.5 gpm with one pump running, 24 gpm with two pumps running)
Where does RCP seal bleedoff go?
VCT
In the event of a containment isolation where does the RCP seal bleedoff go?
RDT via relief valve.
Why is Lithium added to the RCS?
To raise PH
Why do we add Hydrogen Peroxide to the RCS?
Crud Burst to reduce RCS activity to reduce dose
Where do the overflow lines of the RMWT and RWT go?
Holdup tank sump
Where are the BAMPs located?
70 foot aux building
What temperature is maintained at the Boric Acid Batch Tank when batching?
160 degrees F
How do 210X and 210Y fail on a loss of air or power?
Fail Closed