05000498/LER-2014-001, Regarding Overpower Condition Relating to the Ultrasonic Flow Measurement System | South Texas | 24 March 2014 | Regarding Overpower Condition Relating to the Ultrasonic Flow Measurement System |
05000499/LER-2014-001, Standby Diesel Generator 23 Essential Cooling Water Leak Through the Wall of Aluminum-Bronze Pipe Nipple | South Texas | 17 March 2014 | Standby Diesel Generator 23 Essential Cooling Water Leak Through the Wall of Aluminum-Bronze Pipe Nipple |
05000499/LER-2013-004, South Texes Project, Unit 2 Regarding Manual Actuation of Main Steam Isolation Valves That Was Not Part of a Preplanned Sequence During Testing or Reactor Operation | South Texas | 18 February 2014 | South Texes Project, Unit 2 Regarding Manual Actuation of Main Steam Isolation Valves That Was Not Part of a Preplanned Sequence During Testing or Reactor Operation |
05000498/LER-2013-003, Regarding Unanalyzed Condition - Direct Current Ammeter Circuits Without Overcurrent Protection | South Texas | 23 December 2013 | Regarding Unanalyzed Condition - Direct Current Ammeter Circuits Without Overcurrent Protection |
05000498/LER-2013-002, Regarding Steam Turbine-Driven Auxiliary Feedwater Pump Flow Regulating Valve Inoperable for Longer than Allowed by Technical Specifications | South Texas | 29 July 2013 | Regarding Steam Turbine-Driven Auxiliary Feedwater Pump Flow Regulating Valve Inoperable for Longer than Allowed by Technical Specifications |
05000498/LER-2013-001, Regarding Delta Temperature/T-Average Channel a Inoperable for Longer than Allowed by Technical Specifications | South Texas | 3 July 2013 | Regarding Delta Temperature/T-Average Channel a Inoperable for Longer than Allowed by Technical Specifications |
05000499/LER-2013-003, Regarding Operational Mode Change Prohibited by Limiting Condition for Operation 3.0.4 with Limiting Conditions for Operation Unknowingly Not Met for Inoperable Essential Cooling Water Pump | South Texas | 21 March 2013 | Regarding Operational Mode Change Prohibited by Limiting Condition for Operation 3.0.4 with Limiting Conditions for Operation Unknowingly Not Met for Inoperable Essential Cooling Water Pump |
05000499/LER-2013-002, Regarding Reactor Trip Due to Main Transformer Lockout Relay Trip | South Texas | 7 March 2013 | Regarding Reactor Trip Due to Main Transformer Lockout Relay Trip |
05000499/LER-2013-001, Regarding Manual Reactor Trip Due to Dropped Rods M8 and D8 | South Texas | 28 February 2013 | Regarding Manual Reactor Trip Due to Dropped Rods M8 and D8 |
05000498/LER-2012-001, Regarding Instrumentation Channel NI-45A Failed Channel Check | South Texas | 31 May 2012 | Regarding Instrumentation Channel NI-45A Failed Channel Check |
05000499/LER-2011-003, Regarding Unit 2 Plant Mode Change with Turbine Trip Disabled | South Texas | 30 January 2012 | Regarding Unit 2 Plant Mode Change with Turbine Trip Disabled |
05000499/LER-2011-002, Regarding Reactor Trip on Main Generator Lockout | South Texas | 30 January 2012 | Regarding Reactor Trip on Main Generator Lockout |
05000499/LER-2011-001, For South Texas, Unit 2, Regarding Exceeding ESF Bus Voltage Technical Specification Surveillance Acceptance Criteria | South Texas | 6 September 2011 | For South Texas, Unit 2, Regarding Exceeding ESF Bus Voltage Technical Specification Surveillance Acceptance Criteria |
05000498/LER-2011-001, For South Texas, Unit 1, Regarding Technical Specification Requirement Not Met Regarding Unborated Water Sources | South Texas | 11 July 2011 | For South Texas, Unit 1, Regarding Technical Specification Requirement Not Met Regarding Unborated Water Sources |
05000499/LER-2010-005-02, Regarding Startup Feed Pump 24 Breaker Failure and Unit 2 Reactor Trip | South Texas | 7 July 2011 | Regarding Startup Feed Pump 24 Breaker Failure and Unit 2 Reactor Trip |
05000499/LER-2010-005-01, For South Texas Project Unit 2, Regarding Startup Feed Pump 24 Breaker Failure and Unit 2 Reactor Trip | South Texas | 4 April 2011 | For South Texas Project Unit 2, Regarding Startup Feed Pump 24 Breaker Failure and Unit 2 Reactor Trip |
05000499/LER-2010-006, Regarding Technical Specifications Not Met for Reactor Coolant System Unidentified Leakage | South Texas | 18 January 2011 | Regarding Technical Specifications Not Met for Reactor Coolant System Unidentified Leakage |
05000499/LER-2010-005, Regarding Startup Feed Pump 24 Breaker Failure and Unit 2 Reactor Trip | South Texas | 3 January 2011 | Regarding Startup Feed Pump 24 Breaker Failure and Unit 2 Reactor Trip |
05000499/LER-2010-004, Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A | South Texas | 20 December 2010 | Loss of the Train a Essential Cooling Water (Ecw) System Due to a Loss of the Ecw Intake Structure Ventilation Fan 21A |
05000498/LER-2010-003, Regarding Unit 1 Reactor Trip During Surveillance Testing | South Texas | 19 October 2010 | Regarding Unit 1 Reactor Trip During Surveillance Testing |
05000499/LER-2010-002, Regarding Unanalyzed Condition Regarding the Fire Protection System | South Texas | 11 March 2010 | Regarding Unanalyzed Condition Regarding the Fire Protection System |
05000499/LER-2009-001, Regarding Essential Chiller 22A Trip on Low Oil Pressure | South Texas | 14 September 2009 | Regarding Essential Chiller 22A Trip on Low Oil Pressure |
05000498/LER-2009-001, For South Texas Project, Unit 1 Regarding Oil Reservoir for Essential Chiller 12B Below Required Temperature | South Texas | 30 July 2009 | For South Texas Project, Unit 1 Regarding Oil Reservoir for Essential Chiller 12B Below Required Temperature |
05000499/LER-2008-002, Regarding Valid Actuation of Safety Systems | South Texas | 22 December 2008 | Regarding Valid Actuation of Safety Systems |
05000498/LER-2007-003, From South Texas Project, Unit 1, Incorrect Count Rate Board Installed in Extended Range Nuclear Instrumentation Channel | South Texas | 4 December 2007 | From South Texas Project, Unit 1, Incorrect Count Rate Board Installed in Extended Range Nuclear Instrumentation Channel |
05000498/LER-2007-002, From South Texas, Unit 1, Regarding Entry Into TS 3.0.3 for Greater than 1 Hour Due to Inoperable Degraded Voltage Relays | South Texas | 16 July 2007 | From South Texas, Unit 1, Regarding Entry Into TS 3.0.3 for Greater than 1 Hour Due to Inoperable Degraded Voltage Relays |
05000498/LER-2006-006, Re Inoperable Auxiliary Feedwater Flow Instrumentation | South Texas | 15 February 2007 | Re Inoperable Auxiliary Feedwater Flow Instrumentation |
05000498/LER-2006-005, Re Quadrant Power Tilt Ratio Surveillance Not Performed as Required by TS 3.3.1 Action 2 | South Texas | 28 December 2006 | Re Quadrant Power Tilt Ratio Surveillance Not Performed as Required by TS 3.3.1 Action 2 |
05000498/LER-2006-004, Re Multiple Main Steam Safety Valves Found Outside Acceptance Criteria | South Texas | 16 November 2006 | Re Multiple Main Steam Safety Valves Found Outside Acceptance Criteria |
05000498/LER-2006-003, Re Control Room Envelope HVAC Makeup Fan 11B Failure to Start | South Texas | 9 November 2006 | Re Control Room Envelope HVAC Makeup Fan 11B Failure to Start |
05000498/LER-2006-002, Regarding Simultaneous Inoperability of Two Essential Chilled Water Trains | South Texas | 30 May 2006 | Regarding Simultaneous Inoperability of Two Essential Chilled Water Trains |
05000499/LER-2005-005, Re 125 Vdc Switchboard De-Energized Without Placing Fhb HVAC in Emergency Recirculation Mode | South Texas | 21 December 2005 | Re 125 Vdc Switchboard De-Energized Without Placing Fhb HVAC in Emergency Recirculation Mode |
05000499/LER-2005-006, Re Missing Motor-Operated Valve T-Drains | South Texas | 20 December 2005 | Re Missing Motor-Operated Valve T-Drains |
05000499/LER-2005-004, Re Essential Cooling Water Inoperable Longer than Allowed Outage Time | South Texas | 12 September 2005 | Re Essential Cooling Water Inoperable Longer than Allowed Outage Time |
05000499/LER-2005-002, Regarding Essential Chiller 22C Inoperable Longer than Allowed by Technical Specifications | South Texas | 27 April 2005 | Regarding Essential Chiller 22C Inoperable Longer than Allowed by Technical Specifications |
05000499/LER-2005-001, Regarding Shutdown of STP Unit 2 Due to Reactor Coolant System Pressure Boundary Leak | South Texas | 5 April 2005 | Regarding Shutdown of STP Unit 2 Due to Reactor Coolant System Pressure Boundary Leak |
05000498/LER-2004-006, Re Pressurizer Power-Operated Relief Valve Being Inoperable for a Time Period Longer than Allowed by Technical Specifications | South Texas | 17 January 2005 | Re Pressurizer Power-Operated Relief Valve Being Inoperable for a Time Period Longer than Allowed by Technical Specifications |
05000498/LER-2004-005, Regarding Standby Diesel Generator 12 Not Being Declared Inoperable While the Auxiliary Feedwater Pump 12 Breaker Cell Switch Was Being Replaced | South Texas | 25 October 2004 | Regarding Standby Diesel Generator 12 Not Being Declared Inoperable While the Auxiliary Feedwater Pump 12 Breaker Cell Switch Was Being Replaced |