AOP Flashcards
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 EO? 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 is the most probably 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
When do you trip the reactor and enter E-0 during an RCS Leak?
When the leak exceeds the capacity of 2 CCPs
If containment pressure approaches 1 psig
VCT Level cannot be maintained
In the Control Air Malfunction AOP, there is a caution about an inadvertent SI. What could this be caused by?
Uneven cooling of the SGs causing steamline dP SI
During a spurious phase A, why would the PRT parameters change?
Seal return isolates
What is expected to happen when you reset phase A?
CUVs start
What happens to rods if MPC-253 fails height?
Rods step out
What happens if MPC-253 fails low?
Rods step in
What happens if Tave Fails high?
Rods step in
What happens if PR Fails High?
Rods step in , but C2 prevents rods from stepping back out due to temp error
What happens if PR fails low or Tave fails low?
NO Rod motion
If 1 control rod falls into the core, what is affected?
Radial Power distribution.
NOT SDM
Which CRID loss is the most survivable?
CRID 3
If Train A 250 VD is loss, does the Generator Trip in U1?
NO! Train A supplies 33 VED, so it doesn’t energize
Will a single ground on the generator field cause any harm?
No. However, a second groups could cause excessive field current and cause extensive damage
Why do we want to keep the generator connected to the grid until the turbine stop valves are closed?
So we don’t Overspeed the turbine
If a PRZ Level channel fails high, what does QRV-251 do assuming no operator action?
Throttles to LESS than minimum charging, supply approximately 19 gpm seal injection flow
If in M3 and there is a Loss of NESW, what is the required action and impact?
Stop ALL but 1 RCP and perform a pressure relief, containment chillers have lost cooling water
