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05000313/FIN-2018003-052018Q3Arkansas NuclearFailure to Maintain Main Feedwater Pump B Discharge Pressure in Band Caused a Reactor Trip
05000397/FIN-2018003-022018Q3ColumbiaFailure to Control Workers in a High Radiation Area (>1.0 rem per hour)High Radiation Area
Locked High Radiation Area
05000528/FIN-2018002-022018Q2Palo VerdeFailure to Implement and Maintain Procedures Regarding Breathing Air Quality
05000483/FIN-2018002-022018Q2CallawayFailure to Establish Maintenance Procedures for Doors that Provide Safety-Related Functions
05000382/FIN-2017002-022017Q2WaterfordFailure to Ensure Containment Equipment Hatch Closure Prior to RCS Time to BoilTime to boil
Significance Determination Process
Fuel cladding
05000368/FIN-2017002-012017Q2Arkansas NuclearFailure to Follow Fire Protection Program ProceduresSafe Shutdown
Significance Determination Process
Fire Protection Program
05000397/FIN-2016009-092017Q1ColumbiaFailure to Minimize Void Spaces in a Radioactive Waste Package
05000382/FIN-2016004-012016Q4WaterfordFailure to Ensure Appropriate Post-Maintenance Testing on Essential Chiller BSignificance Determination Process
05000529/FIN-2016004-012016Q4Palo VerdeInadequate monitoring of MSIV nitrogen pre-charge pressure
05000458/FIN-2016404-032016Q4River BendSecurity
05000285/FIN-2016002-022016Q2Fort CalhounFailure to Develop Adequate Procedures for Post Modification TestingSignificance Determination Process
05000458/FIN-2016002-032016Q2River BendFailure to Identify and Correct Improperly Stowed Transient CombustiblesSafe Shutdown
Condition Adverse to Quality
Significance Determination Process
05000483/FIN-2016001-022016Q1CallawayInadequate Operability Evaluation for Degraded Flood Mitigation Capability in Piping Penetration RoomSafe Shutdown
Internal Flooding
05000313/FIN-2016001-012016Q1Arkansas NuclearFailure to Assess and Manage Hot Work RiskProbabilistic Risk Assessment
Significance Determination Process
Incremental Core Damage Probability Deficit
05000483/FIN-2015009-012015Q4CallawayFailure to Verify the Suitability of the Design of the Reverse-Engineered Replacement Controller Cards for the Auxiliary Feedwater Flow Control ValvesSignificance Determination Process
05000275/FIN-2015004-012015Q4Diablo CanyonFailure to Properly Evaluate for Aggregate Impact of Fire ImpairmentsSafe Shutdown
Fire impairment
Significance Determination Process
Continuous fire watch
Fire Protection Program
05000483/FIN-2015004-032015Q4CallawayFailure to Follow Plant Procedure for Unit Reliability TeamDownpower
05000397/FIN-2015003-042015Q3ColumbiaFailure to Implement Procedures to Ensure Availability of Safe Shutdown PersonnelSafe Shutdown
Significance Determination Process
05000368/FIN-2015008-032015Q2Arkansas NuclearInadequate Extent of Condition Review for Risk-Significant ConditionCondition Adverse to Quality
05000298/FIN-2015008-012015Q2CooperFailure to Evaluate a Valve Degraded Condition before Returning the Valve to ServiceSignificance Determination Process
05000482/FIN-2015002-012015Q2Wolf CreekClass 1E 4kV Feeder Breakers from Station Blackout Diesel Generators Current Transformer Wiring not Installed per Design Drawings
05000298/FIN-2015007-012015Q2CooperFailure to Perform an Operability Review of a Condition ReportSignificance Determination Process
05000382/FIN-2014007-022015Q1WaterfordInadequate Station Procedures for Temporary Emergency Diesel GeneratorSignificance Determination Process
05000528/FIN-2014404-012015Q1Palo VerdeSecurity
05000458/FIN-2015001-022015Q1River BendInadequate Engineering Change and Work Instruction Review Results in Reactor Recirculation Pump TripSignificance Determination Process
Power change
05000458/FIN-2015001-032015Q1River BendFailure to Operate Condensate Demineralizer System Following Reactor Scram Results in Loss of All Feedwater
05000528/FIN-2015001-012015Q1Palo VerdeFailure to conduct required in-service testing in accordance with ASME OM Code
05000482/FIN-2014004-012014Q3Wolf CreekFailure to Maintain Control and Cognizance of Activities With the Potential to Impact Plant ConditionsSignificance Determination Process
05000482/FIN-2014004-022014Q3Wolf CreekFailure to Ensure That Outage Work Could Be Safely Performed During the Existing Plant ConditionsSignificance Determination Process
05000285/FIN-2014003-012014Q2Fort CalhounFailure to Control an Entry to a High Radiation Area Resulting in a Dose Rate AlarmHigh Radiation Area
Significance Determination Process
Substantial potential for overexposure
05000445/FIN-2014003-042014Q2Comanche PeakFailure to Adequately Brief Workers on Radiological Conditions Prior to Entry into High Radiation AreasHigh Radiation Area
Significance Determination Process
Substantial potential for an overexposure
05000416/FIN-2014002-012014Q1Grand GulfFailure to Ensure Scaffold Activity Would not Interfere with Fire Brigade ResponseSafe Shutdown
Significance Determination Process
Fire Protection Program
05000254/FIN-2013004-012013Q3Quad CitiesWrong Parts Installed For CRD HCUSignificance Determination Process
05000313/FIN-2011005-022011Q4Arkansas NuclearFailure to Implement Procedure Results in Lowering Spent Fuel Pool Level by 0.6 Feet
05000483/FIN-2011005-072011Q4CallawayFailure to Correctly Implement Plant Maintenance ProceduresTime to boil
05000482/FIN-2011005-032011Q4Wolf CreekPreconditioning of 480 Vac Breakers Prior to Required Surveillance Testing
05000298/FIN-2011003-032011Q2CooperFailure to Follow Procedure Results in Personnel ContaminationsSignificance Determination Process
Substantial potential for an overexposure
05000482/FIN-2011002-072011Q1Wolf CreekFailure to Verify Ultimate Heat Sink Sedimentation Levels within Design BasesUltimate heat sink
Significance Determination Process
05000361/FIN-2011002-012011Q1San OnofreFailure to Follow Station Procedures for Seasonal Readiness
05000482/FIN-2011002-112011Q1Wolf CreekFailure to Follow Radiation Work Permit InstructionsLocked High Radiation Area
Significance Determination Process
Substantial potential for overexposure
05000254/FIN-2010003-022010Q2Quad CitiesPCIS Relay Common Neutral Broken
05000458/FIN-2010006-012010Q2River BendFailure to Ensure at Least One Train of Equipment Necessary to Achieve Hot Shutdown Conditions is Free of Fire DamageSafe Shutdown
Temporary Modification
Significance Determination Process
05000275/FIN-2009005-012009Q4Diablo CanyonLess Than Adequate Work Planning Resulted in the Release of Two Gas Decay Tanks
05000361/FIN-2009005-072009Q4San OnofreInadequate Circulating Water System Maintenance Procedures Contribute to Unit 2 Inadvertent Reactor TripSignificance Determination Process
05000397/FIN-2009005-032009Q4ColumbiaFailure to Notify Radiological Planning Personnel of a Work Plan DeviationSignificance Determination Process
05000528/FIN-2009005-022009Q4Palo VerdeFailure to Maintain Containment Closure CapabilitySignificance Determination Process
Large early release frequency
05000397/FIN-2009004-022009Q3ColumbiaFailure to Perform Back-up Monitoring
05000458/FIN-2009004-012009Q3River BendFailure to Implement Containment Closure ProcedureSignificance Determination Process
05000482/FIN-2009004-022009Q3Wolf CreekInability to Perform Manual Actions for Risk Assessment
05000254/FIN-2009003-042009Q2Quad CitiesTrip of Unit 2 Fuel Pool Cooling Water Pumps During Scorpion Platform Removal