10 CFR 50.65(a)(4)

10 CFR 50.65, Requirements for Monitoring the Effectiveness of Maintenance At Nuclear Power Plants

(4) Before performing maintenance activities (including but not limited to surveillance, post-maintenance testing, and corrective and preventive maintenance), the licensee shall assess and manage the increase in risk that may result from the proposed maintenance activities. The scope of the assessment may be limited to structures, systems, and components that a risk-informed evaluation process has shown to be significant to public health and safety.

The violation comes from misjudging what the risk of a plant activity was. Typically, something could be discovered to have affected Risk but wasn't accounted for in the model. If this error results in a significant enough difference (detected by a change in risk state) then the discovery could be counted as a violation.

See IMC 0609 Appendix K, Maintenance Risk Assessment and Risk Management Significance Determination Process for details.

Type of violation

	Site	Company⠉	Quarter	Title	Significance	Inspection procedure	Topic
05000373/FIN-2018003-04	LaSalle	Constellation	2018Q3	Failure to Manage the Increase in Risk During a Battery Charger Capacity Tes	Green	IP 71111.22
05000352/FIN-2018003-01	Limerick	Constellation	2018Q3	Failure to Assess and Manage Risk Associated with Fuel Oil Storage Tank Maintenance	Green	IP 71111.13
05000483/FIN-2018002-01	Callaway	Ameren	2018Q2	Failure to Adequately Assess and Manage Risk Associated with Switchyard Work During a Planned Risk Significant Turbine-Driven Auxiliary Feedwater Pump Equipment Outage	Green	IP 71111.12
05000498/FIN-2018001-01	South Texas	STP Nuclear Operating Company	2018Q1	Failure to Perform a Maintenance Risk Assessment Prior to Conducting Maintenance	Green	IP 71111.13
05000395/FIN-2018001-01	Summer	South Carolina Electric & Gas Company	2018Q1	Failure to Perform an Adequate Risk Assessment With Consequent Reactor Trip	Green	IP 71153, Event Followup
05000333/FIN-2017004-03	FitzPatrick	Constellation	2017Q4	Licensee-Identified Violation	Green
05000220/FIN-2017004-05	Nine Mile Point	Constellation	2017Q4	Licensee-Identified Violation	Green		Significance Determination Process
05000461/FIN-2017004-02	Clinton	Constellation	2017Q4	Failure to Assess and Manage Risk Associated with the Performance of Control Rod Time Testing	Green	IP 71153, Event Followup	Significance Determination Process
05000461/FIN-2017004-01	Clinton	Constellation	2017Q4	Reactor Down Power due to Reactor Recirculation Pump Motor Lower Bearing Oil Leak	Green	IP 71153, Event Followup
05000445/FIN-2017002-04	Comanche Peak	Luminant	2017Q2	Failure to Adequately Assess Risk and Implement Risk Management Actions for Proposed Maintenane	Green	IP 71111.13	High winds Tornado Missile Significance Determination Process Incremental Core Damage Probability Deficit
05000410/FIN-2017002-01	Nine Mile Point		2017Q2	Inadequate Extent of Condition Results inUnplanned Yellow Risk Condition	Green	IP 71111.13	Probabilistic Risk Assessment Incremental Core Damage Probability Deficit
05000388/FIN-2017002-02	Susquehanna	Talen Energy	2017Q2	Failure to Assess and Manage Risk Associated with Emergent Work	Green	IP 71111.13
05000272/FIN-2017001-02	Salem	PSEG	2017Q1	Inadequate Fire Risk Assessment and Management	Green	IP 71111.13	Fire Watch
05000293/FIN-2016004-03	Pilgrim	Holtec	2016Q4	Failure to Properly Assess and Manage Risk Associated with Shutdown Transformer Protective Relay Testing	Green	IP 71153, Event Followup	Significance Determination Process Incremental Core Damage Probability Deficit
05000354/FIN-2016004-01	Hope Creek	PSEG	2016Q4	Trip of Protected RWCU Pump during Maintenance Activity	Green	IP 71111.13	Significance Determination Process
05000286/FIN-2016003-01	Indian Point	Entergy	2016Q3	Failure to Adequately Assess Fire Risk Associated with Maintenance on the Unit 3 Appendix R Diesel Generator	Green	IP 71111.13	Safe Shutdown Significance Determination Process
05000387/FIN-2016003-02	Susquehanna		2016Q3	Risk Management Actions Not Adequately Implemented	Green	IP 71111.13	Safe Shutdown Fire impairment Significance Determination Process Fire Watch
05000324/FIN-2016003-01	Brunswick	Duke Energy	2016Q3	Failure to Implement Risk Management Actions during Elevated Risk	Green	IP 71111.13	Significance Determination Process
05000261/FIN-2016003-02	Robinson	Duke Energy	2016Q3	Failure to Assess and Manage Risk for Main Turbine Trip Maintenance Resulting in Turbine/Reactor Trip	Green	IP 71111.13	Significance Determination Process Incremental Core Damage Probability Deficit
05000440/FIN-2016002-02	Perry	FirstEnergy	2016Q2	Licensee-Identified Violation	Green		Probabilistic Risk Assessment
05000395/FIN-2016002-01	Summer		2016Q2	Failure to Adequately Manage Risk of Maintenance Activities Following Risk Model Updates	Green	IP 71111.13	Significance Determination Process
05000410/FIN-2016001-01	Nine Mile Point		2016Q1	Inadequate Procedure Leading to Failure to Manage Elevated Risk during Preventive Maintenance	Green	IP 71111.13	Significance Determination Process Incremental Core Damage Probability Deficit
05000313/FIN-2016001-06	Arkansas Nuclear	Entergy	2016Q1	Licensee-Identified Violation	Green		Significance Determination Process Large early release frequency Incremental Core Damage Probability Deficit
05000289/FIN-2016001-02	Three Mile Island	Constellation	2016Q1	Licensee-Identified Violation	Green		Significance Determination Process
05000410/FIN-2016001-02	Nine Mile Point		2016Q1	50.65(a)(4) Risk Evaluation Not Properly Performed Prior to Residual Heat Removal Heat Exchanger Testing	Green	IP 71111.13	Significance Determination Process Incremental Core Damage Probability Deficit
05000388/FIN-2016001-01	Susquehanna		2016Q1	Failure to Assess and Manage Risk of Maintenance Activities for a SLC System Flow Surveillance	Green	IP 71111.13	Probabilistic Risk Assessment Incremental Core Damage Probability Deficit
05000247/FIN-2016001-02	Indian Point		2016Q1	Failure to Adequately Implement Risk Management Actions for the Containment Key Safety Function	Green	IP 71111.13	Significance Determination Process
05000313/FIN-2016001-01	Arkansas Nuclear		2016Q1	Failure to Assess and Manage Hot Work Risk	Green	IP 71111.13	Probabilistic Risk Assessment Significance Determination Process Incremental Core Damage Probability Deficit
05000458/FIN-2016009-04	River Bend	Entergy	2016Q1	Failure to Adequately Assess Risk During Motor Generator Set Unavailability	Green	IP 93812	Significance Determination Process Incremental Core Damage Probability Deficit
05000461/FIN-2016001-05	Clinton		2016Q1	Failure to Assess and Manage Risk Increase for a Proposed Maintenance Activity	Green	IP 71153, Event Followup	Significance Determination Process
05000313/FIN-2015004-01	Arkansas Nuclear		2015Q4	Failure to Assess Risk for Switchyard Work	Green	IP 71111.13	Significance Determination Process Incremental Core Damage Probability Deficit
05000259/FIN-2015004-02	Browns Ferry	Tennessee Valley Authority	2015Q4	Failure to Properly Manage Risk During Planned Maintenance Activities	Green	IP 71111.13	Significance Determination Process
05000395/FIN-2015003-01	Summer		2015Q3	Failure to Assess and Manage Risk Associated with Emergent Work	Green	IP 71111.13	Significance Determination Process Incremental Core Damage Probability Deficit
05000445/FIN-2015002-01	Comanche Peak		2015Q2	Failure to Adequately Assess Risk and Implement Risk Management Actions for Proposed Maintenance	Green	IP 71111.13	Temporary Modification Significance Determination Process
05000317/FIN-2015001-02	Calvert Cliffs	Constellation	2015Q1	Inadequate Risk Management Action for LOCI Sequencer Maintenance	Green	IP 71111.15, Operability Determinations and Functionality Assessments	Significance Determination Process
05000334/FIN-2014005-01	Beaver Valley	Vistra	2014Q4	Failure to Adequately Implement Risk Management Actions	Green	IP 71111.13
05000387/FIN-2014005-01	Susquehanna		2014Q4	Risk Management Actions Not Implemented	Green	IP 71111.13
05000423/FIN-2014005-02	Millstone	Dominion	2014Q4	Failure to Manage Risk of RSST Testing	Green	IP 71111.13	Reserve Station Service Transformer Significance Determination Process
05000275/FIN-2014005-03	Diablo Canyon	Pacific Gas & Electric	2014Q4	Failure to Effectively Implement Risk Management Actions Associated with Safety-Related Emergency Diesel Generators	Green	IP 71153, Event Followup	Significance Determination Process Incremental Core Damage Probability Deficit
05000272/FIN-2014004-01	Salem		2014Q3	Improper Risk Assessment and Risk Management Actions for a Reheater Drain Valve	Green	IP 71111.13	Fuel cladding
05000289/FIN-2014003-01	Three Mile Island		2014Q2	Risk Mitigation Actions Not Performed for Excavation of Nuclear River System Cable Conduits	Green	IP 71111.13	Tornado Generated Missile Significance Determination Process
05000458/FIN-2014002-02	River Bend		2014Q1	Failure to Assess and Manage Risk for Electrical Switchyard Impacting Maintenance	Green	IP 71111.13	Significance Determination Process Large early release frequency
05000298/FIN-2014002-01	Cooper	Entergy	2014Q1	Failure to Implement Risk Management Actions for Maintenance Activities	Green	IP 71111.13	Internal Flooding Significance Determination Process
05000277/FIN-2014002-01	Peach Bottom	Constellation	2014Q1	Licensee-Identified Violation	Green		Significance Determination Process Incremental Core Damage Probability Deficit
05000272/FIN-2014002-02	Salem		2014Q1	Inadequate Online Risk Assessment for an Adverse Change in Grid Conditions	Green	IP 71111.13	Significance Determination Process Incremental Core Damage Probability Deficit
05000311/FIN-2014002-03	Salem		2014Q1	Inadequate Risk Assessment and Risk Management Actions for UV Testing	Green	IP 71111.13	Significance Determination Process Incremental Core Damage Probability Deficit
05000247/FIN-2014002-02	Indian Point		2014Q1	Incomplete Risk Assessment While Pressurizer Safety Valves Were Being Remov	Green	IP 71111.13
05000219/FIN-2014002-01	Oyster Creek	Holtec	2014Q1	Untimely Performance of a 50.65 a(4) Risk Evaluation during a Maximum Emergency Generation Action	Green	IP 71111.13
05000346/FIN-2013005-02	Davis Besse	Cleveland Electric	2013Q4	Emergency Diesel Generator No. 2 Rendered Unavailable By Scheduled Maintenance	Green	IP 71111.13	Significance Determination Process
05000298/FIN-2013005-02	Cooper		2013Q4	Failure to Implement Risk Management Actions for Proposed Maintenance Activities	Green	IP 71111.13	Significance Determination Process
... further results

Navigation menu

Search