AOP-702 Loss of Component Cooling Water

Entry Conditions

CCS Pump Trip
Basically any Header/Tank alarm
High/Low RCP Supply/Return flow
Loss of SWS to CCS Hx

Actions if Surge Tank is Drained (<5%)
(Step 1 RNO)

Perform E-0
Trip all RCPs (Sequentially Loop 2s first)
Place CCS Pumps in STOP/LOCK
Stop any running RNS Pumps

Caution regarding starting CCS Pump with known leakage

If system leakage caused the loss of CCS, do NOT start a CCS Pump until the leak has been isolated

Condition to start a CCS Pump
(Step 3 RNO if NO CCS pumps are running)

Surge tank must be >5% AND stable/rising

If unable to start pump, take same actions as if empty surge tank with the addition of maintaining running CVS MU flow >50gpm

Check CCS HX Cooling
(Step 4)

Normal CCS Discharge Header Temp is <95°F
Anything higher is indication of loss of cooling

RNO:
Restore SWS per AOP-704 While Continuing

*E-0 Action: Cannot maintain <110°F

Indications of a Non-Intact RCP Heat Exchanger

CCS Radiation Abnormal
CCS Surge Tank RISING
CCS Supply and Return to each RCP:
Flow Greater than 750gpm
Deviation Alarm

CCS Pump Operating Limits
(Step 13b.)

Suction Header Temperature <130°F
Suction Pressure >10psig
Discharge Header Flow >5,000gpm

Instrument Air Compressor Actions

If NO CCS Pump running:
Open and Lock compressor feeder breakers
Locally connect temporary air compressor (Room 20500)

If you have at least ONE Pump running:
Open and Lock ONE compressor feeder breaker

Non-Essential CCS Loads Shutdown per AOP-702
(Step 19)

RCP VFDs
SA Compressors
High Cap Chillers
Condensate Pumps
MFW Pumps

System Restoration Nuances
(Step 29)

AOPs: Instrument Air (703) and Fuel Pool Cooling (116)

SOPs: CCS Pump, CVS, VWS, PSS