PLANT PROCESS COMPUTER (PPC) Flashcards
What is the frequency for preparing a power map using the PPC and FIDMS per Tech Spec 3.5.2.8?
Every 31 EFPDs.
What are the power supplies for the PPC?
Normal = 13.2kV via 1W switchgear thru OSF UPS, Backup = 1M 480V, Emergency = OSF UPS (Batteries).
What does “Delete from Scan” do in the PPC?
Removes the value from displays and calculations.
What does “Delete from Monitor” do in the PPC?
Keeps the point displayed and used in calculations but removes it from the alarm screen.
What are the PPC plant modes?
Power Operations, Heat-Up/Cooldown (HU/CD), and Decay Heat.
What is the function of ERDS in the PPC?
Continuously sends PPC data to the NRC.
What actions are required if PPC is O.O.S. for an extended period?
Perform hand calculations for Secondary Side Heat Balance, Ex-core calibration, Core Power Distribution, Shift and Daily Checks, RCS Leakrate, and Core Power Distribution Verification.
What happens when the FW flow correction factor is reset in PPC?
Calculated Heat Balance indicates HIGH, requiring Rx power reduction to maintain thermal power <2568MWt.
What must be done before shutting down both PPC servers?
Place ULD in HAND.
How does a new RCS leak affect the 2-hour calculation in PPC?
The calculation is initially non-conservative since it averages the last 2 hours.
How often must tilt be manually checked if PPC and alarms are OPERABLE?
Every 7 days.
How often must tilt be manually checked if PPC and alarms are NOT OPERABLE?
Every 12 hours.
How often must imbalance be calculated if PPC and alarms are OPERABLE?
Every 12 hours.
How often must imbalance be calculated if PPC and alarms are NOT OPERABLE?
Every 1 hour.
