AOP-23 Primary Coolant Leak Flashcards
What is the purpose of AOP-23, Primary Coolant Leak?
It is for PCS unidentified leakage greater than 0.15 gpm when the
Shutdown Cooling System is not initially in service.
What are the AOP-23, Primary Coolant Leak entry conditions?
PCS leak rate greater than 0.15 gpm unidentified calculated in accordance with
DWO-1, “Operator’s Daily/Weekly Items Modes 1, 2, 3, and 4”
Symptons of a leak coupled with:
- Unexplained drop in VCT level
- Unexplained rise in Containment pressure, temperature, humidity, radiation and/or sump level
- Unexplained Charging and Letdown Flow Mismatch
Symptons of a leak coupled with many possible alarms:
- EK-0201, “CONT GAMMA RIA-2321 HIGH” (400 R/hr)
- EK-0202, “CONT GAMMA RIA-2322 HIGH” (400 R/hr)
- EK-0213, “CONT GAMMA RIA-2321 ALERT” (40 R/hr)
- EK-0214, “CONT GAMMA RIA-2322 ALERT” (40 R/hr)
- EK-0702, “RELIEF VALVE 2006 DISCH HI TEMP” (200F)
- EK-0731, “QUENCH TANK HI TEMP” (150F)
- EK-0732, “QUENCH TANK HI PRESS” (10 psig)
- EK-0733, “QUENCH TANK HI-LO LEVEL” (HI-79%, LO-67%)
- EK-0743, “PRESSURIZER PWR OPERATED RELIEF VALVE DISCHARGE HI TEMP” (180F)
- EK-0744, “PRESSURIZER SAFETY VALVE RV-1039 DISCH HI TEMP” (180F)
- EK-0745, “PRESSURIZER SAFETY VALVE RV-1040 DISCH HI TEMP” (180F)
- EK-0746, “PRESSURIZER SAFETY VALVE RV-1041 DISCH HI TEMP” (180F)
- EK-1172, “COMPONENT CLG SURGE TANK T-3 HI-LO LEVEL” (HI-93%,LO-35%)
- EK-1350, “CONTAINMENT SUMP HI-HI LEVEL” (12”or 10% from bottom)
- EK-1351, “CONTAINMENT SUMP HI LEVEL” (5” from bottom,Elevation 585.41’)
- EK-1362, “CONTAINMENT PRESSURE OFF NORMAL” (0.8 psig)
- EK-1373, “SV AND/OR PORV OPEN”
- EK-1509, “PRI SYSTEM DRAIN TANK T-74 HIGH PRESSURE” (7 psig)
What are the automatic actions of AOP-23, Primary Coolant Leak?
- P-55A Charging Pump speed rises
- Charging Pumps P-55B and/or P-55C start
What are the trip criteria of AOP-23, Primary Coolant Leak?
- Unidentified PCS leak rate greater than 10 gpm
- Non-isolable intersystem leak identified
What is the mitigation strategy of AOP-23, Primary Coolant Leak?
- Determine PCS leak rate
- Conserve PCS inventory
- Locate PCS leak
- Identify required actions
- Trip Reactor when criteria met
What are the main steps of AOP-23, Primary Coolant Leak?
- Review Emergency Plan.
- Ensure Additional Charging Pumps start.
- Determine the PCS leak rate.
- Refer to Attachment 1.
- Verify PCS leak rate not in excess of TS LCO.
- Conserve PCS Inventory.
- Determine PCS leak location.
- Refer to Attachment 2.
- Verify the PCS leak is not a Steam Generator Tube Leak.
- Verify the PCS leak is not an intersystem leak.
- Verify PCS leak is not CRDM seal failure with associated leak rate greater than 2 gpm.
- Determine actions based on unidentified leakrate.
- Notify Chemistry if Reactor Power has changed by 15% or more in any 1 hour
What tech spec is associated with AOP-23, Primary Coolant Leak?
3.4.13 PCS Operational LEAKAGE
PCS operational LEAKAGE shall be limited to:
- No pressure boundary LEAKAGE;
- 1 gpm unidentified LEAKAGE;
- 10 gpm identified LEAKAGE; and
- 150 gallons per day primary to secondary LEAKAGE through any one steam generator (SG).
APPLICABILITY: MODES 1, 2, 3, and 4.
What are the E.I. plan implications of AOP-23, Primary Coolant Leak?
Site Area Emergency - loss of two (PCS and Containment)
- Primary to secondary leak rate greater than 10 GPM and unisolable SG steam release from affected SG to environment.
Alert - Loss of PCS
- PCS leak rate greater than available makeup as indicated by <25F subcooling.
- PCS leak rate greater than 50 GPM
The Primary System leakage calculation of Technical Specification
Surveillance Procedure DWO-1, “Operator’s Daily/Weekly Items Modes 1, 2, 3, and 4,” requires what to be valid for determining T.S. 3.4.13 status?
DWO-1 calculation is the preferred calculation, but it requires a 1-hour leak rate.
What actions are there for CRDM leakage?
If greater than 2 gpm, then perform GOP-8 Shutdown using boration.
