The crew is trying to find the source of in-leakage into the “A” train of the CCP system.
Which of the following are possible sources of the leakage?
“A” RCP thermal barrier
“D” RCP thermal barrier
L/D HX
What is the purpose of the CCP system?
remove heat from various plant components while providing an intermediate barrier between potentially radioactive heat sources and the service water system
How does the CCP system interface with the CVCS system?
cools letdown after exiting letdown orifices, and cools the RCP seal return water in the seal water HX
How do the CCP HX outlet/bypass temperature control valves fail on a loss of instrument air pressure?
the outlet valves fail open and the bypass valves fail closed
Aligning CCP for cooldown operations will help prevent exceeding?
8100 gpm through the CCP HX
Which of the following signals will directly close the CCP non-safety header supply and return isolation valves?
Lo CCP surge tank level
When replacing the “A” or “B” CCP pump and HX with the “C” pump and HX in service, why are the containment headers cross connected?
to ensure adequate cooling water supply to the RCP lube oil coolers during the shift
The CCP to CDS cross connects are provided to:
limit temperature in containment by supplying CCP to select CDS loads after a CIA actuation
The thermal barrier return isolation valves function to:
mitigate the effects of a RCS to CCP leak across the RCP thermal barrier HX by isolating the HX on a high return flow condition
Describe the changes which occur in the CCP system as a result of a low surge tank level
non-safety header isolates and the CCP to CDS cross connects close
Which emergency generator load sequencer signals, if any, would auto start the “B” CCP pump while in local?
SIS and LOP
Which of the following signals auto OPEN the CCP to CDS cross connect valves?
CIA
Which of the following is supplied by the “A” train of CCP when the plant is operating at 100% power?
L/D HX
Which of the following are supplied component cooling water from the “A” train CCP safety header?
safety injection pump cooling surge tank
Which of the following describes how the RPCCW system would be affected by a CIA signal?
isolates the non-safety headers and provides cooling to the containment air recirc and NSS tank coolers
The plant at 100% power. The “C” CCP pump breaker is in its normal standby alignment.
The “A” CCP pump trips
Crew enters AOP 3561
PEO dispatched to align the “C” CCP pump and HX to the “A” train
What action if any needs to be taken with the “C” CCP pump breaker?
the “C” CCP pump breaker needs to be racked down from its “B” train cubicle and racked up into its “A” train cubicle
What is the max CCP flow rate allowed through the CCP HX and what is the basis for the limit?
8100 gpm due to excessive HX tube vibration
Prior to shifting the CCP pumps and HX, why are the containment CCP supply and return headers cross connected?
to ensure uninterrupted supply of CCP to the RCP lube oil coolers
When shifting CCP pumps and HXs, why is total train flow adjusted to greater than 5100 gpm?
prevent a system pressure transient during the pump shift, which may result in lifting a CCP system relief valve
A steam line break outside of containment results in a full SI and CIA actuation. Which CCP headers will auto isolate?
non-safety related header
Why will the RCP thermal barrier cooler return valves auto close when high thermal barrier return flow is sensed?
hi flow could be indicative of a RCS leak into the thermal barrier cooler
The plant is being shutdown from outside the control room.
CCP pumps “A” and “B” are in LOCAL
Both pumps are running
A valid CDA signal is received.
How will each pump respond?
P1A will remain running. P1B will trip
PEO sent to vent and drain portion of CCP system. To where is the PEO required to drain the CCP system water?
tote for disposal
What is the purpose of the CCP containment header?
provide cooling water for heat removal from safety related components inside containment such as the RCPs
