AOP Flashcards
What are the immediate actions for LD Temp / Pressure Failure?
Take controller to manual
If doesn’t work, Isolate Letdown and Minimize Charging
What are the immediate actions for unexpected operation of steam dumps?
Take controller to manual and close
If open due to control failure, place selector switch in OFF
What are the immediate actions for FW Htr Level Control?
Place control in manual
What are the immediate actions for a LO Temperature controller failure?
Place affected controller in hand and stabilize
If AOV doesn’t maintain, use MOV
What happens if the PRZ reference leg develops a leak on the controlling channel?
That channels level will rise, causing actual level to go down due to QRV-251 closing
When temperature drops rapidly during a secondary transient, what don’t you do?
Use rods to restore. The lowering temp and the rod withdrawal both add positive reactivity.
Does MPC-254 affect rod control?
NO
What are the effects if a Tcold instrument fails high?
OPDT and OTDT lower
DT is smaller
Tavg is larger
What will happen if a controlling FF instrument fails low til no operator action?
Turbine / Rx trip on High High SG Level and FWI
For a load rejection, are LONG TERM effects worse at BOL or EOL? And Why?
EOL bc of Xenon Oscillations
For a load rejection, are SHORT TERM effects worse at BOL or EO? And Why?
BOL bc not as much temperature feedback.
What are the immediate actions for loss of CCW?
- Check Unit Status - M1 or M2
- Trip Rx and verify tripped
- Trip RCPs
What do you do on a loss of CCW with both charging pumps running?
Run 1 to failures, place the other in PTL
What do you do on a loss of CCW with only 1 CCP available?
Place C/S in PTL. SAVE THE PUMP!
What do you do with the CCPs in Modes 5 or 6 if CCW is lost?
Stop both CCPs and place PTL
Why would you not cross-tie CCW if the failure is due to a hydraulic condition?
Could cause air binding in the pump
What is the most probable source of CCW out leakage?
RCP Seal Return Hx
What is the assumed LD flow for the XS Letdown Hx?
20 gpm
What is the first thing you do if you have a suspected RCS Leak?
Place XS LD I/S and isolate normal letdown