Low Pressure Core Spray (CSL) Flashcards
Function of LPCS
Sprays each bundle with sufficient water to prevent excessive cladding temperature following a DBA LOCA without the aid of other LP ECCS.
What are the initiation signals for LPCS?
L1
1.68#
What is the discharge flowrate and pressure of the LPCS pump
6350 gpm
290 psig
What is the Power Supply for the LPCS pump?
DIV 1 AC
(DIV 1 DC for instruments and controls)
How do the Unit Coolers affect OPERABILITY of LPCS?
- One Unit Cooler down - OPERABLE.
- Two Unit Coolers down - INOP and declare associated GTS INOP
What happens to *FV114 (LPCS Test Return Valve) on initiation signal?
Where does a line break indication occur in the system for LPCS?
Break between RPV wall and Core Shroud.
What is the Open Permissive for MOV104
88 psid
What is Discharge Pressure for CSL Pump?
450#
When does injection to the RPV actually occur?
When pump discharge pressure is greater than vessel pressure.
What are the features of MOV104 LPCS injection valve?
- No auto closure
- strokes with Overload with initiation signal.
- Throttleable if manually stroking
- Amber light when manually closed.
What actions are taken to secure the pump
- PTL
- Shut MOV104 (injection valve)
What is the purpose of the SCM* panels
- Provide power to postage stamps
- If one of these breakers is open, the system will still function but postage stamp will not light.
What is CSL initiation logic power supply?
BYS*PNL201A
When does min flow valve MOV107 close?
> 1200gpm
What happens on a Thermal Overload for the min flow valve MOV107?
Actuates an annunciator but does not interrupt valve motion.
Does LPCS injection valve open in manual override?
With a LPCS logic initiation signal present and the injection valve manual override sealed in the LPCS injection valve will not auto open.
