AOP-23 "Primary Coolant Leak"

Question 1

AOP-23 entry conditions

Answer 1

• PCS leakrate > 0.15 gpm unidentified IAW DWO-1
• Symptoms of a PCS leak in conjunction with any of the following:
  
  • Unexplained drop in VCT level
  • Unexplained rise in Containment pressure, temperature, humidity, radiation, and/or sump level
  • Unexplained Charging and Letdown flow mismatch
  • 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” (200 F)
  • EK-0731 “Quench Tank HI Temp” (150 F)
  • EK-0732 “Quench Tank HI Press” (10 psig)
  • EK-0733 “Quench Tank HI-LO Level” (79%/67%)
  • EK-0743 “Pressurizer Power Operated Relief Valve Discharge HI Temp” (180 F)
  • EK-0744 “Pressurizer Safety Valve RV-1039 Disch HI Temp” (180 F)
  • EK-0745 “Pressurizer Safety Valve RV-1040 Disch HI Temp” (180 F)
  • EK-0746 “Pressurizer Safety Valve RV-1041 Disch HI Temp” (180 F)
  • EK-1172 “Component Clg Surge Tank T-3 HI-LO Level” (93%/35%)
  • EK-1350 “Containment Sump HI-HI Level” (12” or 10% from bottom)
  • EK-1351 “Containment Sump HI Level” (5” from bottom or 585.41’ elevation)
  • 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)

Question 2

AOP-23 automatic actions

Answer 2

• P-55A, Charging Pump, speed rises

- P-55B and/or P-55C, Charging Pumps, start

Question 3

AOP-23 reactor trip criteria

Answer 3

• Unidentified PCS leak rate > 10 gpm

- Non-isolable intersystem leak identified

Question 4

AOP-23 immediate actions

Answer 4

NONE