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Issue date | Title | Topic | |
---|---|---|---|
05000346/LER-2017-002 | 27 November 2017 | Auxiliary Feed Water Pump Turbine Bearing Damaged due to Improperly Marked Lubricating Oil Sight Glass LER 17-002-00 For Davis-Besse Nuclear Power Station, Unit 1, Regarding Auxiliary Feed Water Pump Turbine Bearing Damaged due to Improperly Marked Lubricating Oil Sight Glass | Time of Discovery Mission time Probabilistic Risk Assessment Large early release frequency |
05000346/LER-2017-001 | 18 September 2017 | Emergency Diesel Generator Fuel Oil Storage Tank Vents Not Adequately Protected from Tornado-Generated Missiles LER 17-001-00 for Davis-Besse, Unit 1, Regarding Emergency Diesel Generator Fuel Oil Storage Tank Vents Not Adequately Protected from Tornado-Generated Missiles | Safe Shutdown Unanalyzed Condition High winds Tornado Missile Enforcement Discretion Tornado Generated Missile Tornado Missile Protection |
05000346/LER-2016-008 | 27 February 2017 | Application of Technical Specification for the Safety Features Actuation System Instrumentation LER 16-008-01 for Davis-Besse Nuclear Power Station Unit 1 Regarding Application of Technical Specification for the Safety Features Actuation System Instrumentation | Enforcement Discretion Functionality Assessment |
05000346/LER-2016-009 | 9 November 2016 | Reactor Trip due to Rainwater Intrusion and Auxiliary Feedwater Actuation on High Steam Generator Level LER 16-009-00 for Davis-Besse Nuclear Power Station, Unit 1 Regarding Reactor Trip due to Rainwater Intrusion and Auxiliary Feedwater Actuation on High Steam Generator Level | Probabilistic Risk Assessment Temporary Modification Large early release frequency |
05000346/LER-2016-007 | 22 August 2016 | Pressurizer Code Safety Valve Setpoint Test Failures LER 16-007-00 for Davis-Besse, Unit 1 Regarding Pressurizer Code Safety Valve Setpoint Test Failures | Time of Discovery Past operability Probabilistic Risk Assessment |
05000346/LER-2016-006 | 15 August 2016 | Potential to Trip Emergency Diesel Generator on High Crankcase Pressure LER 16-006-00 for Davis-Besse Nuclear Power Station Unit 1 RE: Potential to Trip Emergency Diesel Generator on High Crankcase Pressure | Safe Shutdown Unanalyzed Condition Temporary Modification |
05000346/LER-2016-005 | 11 July 2016 | - , Plant Startup with Anticipatory Reactor Trip System in Main Turbine Bypass LER 16-005-00 for Davis-Besse, Unit 1, Regarding Plant Startup with Anticipatory Reactor Trip System in Main Turbine Bypass | Time of Discovery Probabilistic Risk Assessment |
05000346/LER-2016-004 | 6 June 2016 | Reactor Coolant System Hot Leg Resistance Temperature Detector Wire Insulation Degradation LER 16-004-00 for Davis-Besse Nuclear Power Station, Unit 1 Regarding Reactor Coolant System Hot Leg Resistance Temperature Detector Wire Insulation Degradation | Safe Shutdown Time of Discovery Anticipated operational occurrence Post Accident Monitoring |
05000346/LER-2016-003 | 31 May 2016 | Leak from Reactor Coolant Pump Seal Piping Flexible Hose due to Undetected Manufacture Weld Defect LER 16-003-00 for Davis-Besse Nuclear Power Station, Unit 1 Regarding Leak from Reactor Coolant Pump Seal Piping Flexible Hose due to Undetected Manufacture Weld Defect | Boric Acid Time of Discovery Hydrostatic Liquid penetrant Pressure Boundary Leakage Pressure boundary leak |
05000346/LER-2016-002 | 29 March 2016 | Unanticipated Steam and Feedwater Rupture Control System Actuation LER 16-002-00 for Davis-Besse Nuclear Power Station, Unit 1, Regarding Unanticipated Steam and Feedwater Rupture Control System Actuation | |
05000346/LER-2016-001 | 29 March 2016 | 1 OF 7 LER 16-001-00 for Davis-Besse Nuclear Power Station Unit 1 Regarding Reactor Trip During Nuclear Instrumentation Calibrations and Steam Feedwater Rupture Control System Actuation on High Steam Generator Level | Anticipated operational occurrence Large early release frequency |
ML040900342 | 26 March 2004 | LER 97-004-01 for Davis-Besse, Unit 1 Regarding Reactor Coolant Pump Motor Oil Piping Not Protected from Leakage as Required Per 10CFR50, Appendix R | Safe Shutdown Exemption Request Fire Watch Power change |
ML040490193 | 13 February 2004 | LER 99-003-01 for Davis-Besse, Unit 1 Regarding Failure to Perform Engineering Evaluation for Pressurizer Cooldown Rate Exceeding Technical Specification Limit | |
ML033170198 | 7 November 2003 | LER 98-002-01 for Davis-Besse Unit 1 Regarding Plant Trip Due to High Pressurizer Level as a Result of Loss of Letdown Capability | Boric Acid Condition Adverse to Quality |