05000312/LER-1989-002, :on 890228,DHR Sys Dropline Isolation Valve Closed Automatically on High RCS Pressure Signal,Resulting in Temporary Loss of DHR Capability.Caused by Pressure Transmitter Out of Calibr.Loop Recalibr
05000458/LER-2018-008, Potential Loss of Safety Function and Unanalyzed Cond It Ion Due to Legacy Design Deficiency in Control Building HVAC
05000458/LER-2018-004, Unanalyzed Condition Due to Inadequate Protection from Tornado Generated Missiles
05000220/LER-2016-002, Regarding Isolation of Both Emergency Condensers Due to Loss of UPS 1628
05000285/LER-2014-003, Regarding Reactor Trip Due to Stator Water Cooling Leak During Maintenance
05000285/LER-2013-019-01, 1 for Fort Calhoun Regarding Non-Seismic Circulating Water Pipe Could Disable Raw Water Pumps
05000354/LER-2013-010, Regarding Loss of Both Control Room Chillers
05000275/LER-2013-006, Regarding Emergency Diesel Generators Valid Start Signal Due to Loss of Startup Power
05000272/LER-2013-001, Regarding Technical Specification Required Shutdown Due to Exceeding Reactor Coolant System Unidentified Leakage Limit
05000285/LER-2013-012, Regarding Intake Structure Crane Seismic Qualification
05000323/LER-2013-005, Regarding Unit 2 Reactor Trip Due to Lightning Arrester Flashover
05000275/LER-2013-003, Regarding Actuation of Six Emergency Diesel Generators Due to Loss of Offsite Power
05000285/LER-2013-006-01, Regarding Use of Teflon in LPSI and CS Pump Mechanical Seal
05000323/LER-2013-004, Regarding Technical Specification 3.8.1 Not Met Due to Failed Wire Lug on Emergency Diesel Generator 2-3
05000285/LER-2010-003, Regarding Inadequate Margin Renders Auxiliary Feedwater Pump Inoperable
05000366/LER-2013-003, Regarding HPCI Declared Inoperable Due to Error in Connecting Tubing to a Hydraulic Actuator
05000323/LER-2013-002, Both Source Range Nuclear Instruments Inoperable While in Mode 6
05000327/LER-2012-002, Regarding Loss of Auxiliary Control Room Instrumentation
05000323/LER-2013-001, Regarding Valid EDG 2-1 Start Signal Caused by a Loss of 4KV Class 1E Bus G
05000255/LER-2013-001, Regarding Technical Specification Required Shutdown Due to a Component Cooling Water System Leak
05000321/LER-2013-001, Regarding Unplanned RPS Actuation in Response to Reactor Coolant Chemistry Event Caused by a Condenser Tube Leak
05000275/LER-2013-001, Noncompliance with TS 3.4.12, Low Temperature Overpressure Protection System Due to Human Error
05000275/LER-2012-008, Regarding Loss of Control Room Ventilation System Due to Inadequate Design Control
05000275/LER-2011-007-02, Inadequate Control Room Envelope Testing Due to Inadequately-Documented In-leakage Test Data
05000263/LER-2012-005, Regarding Partial Group II Isolation During Removal of Original Steam Dryer
05000364/LER-2012-001, Regarding TDAFW Pump Orifice Plate Thickness Results in Condition Prohibited by Technical Specifications
05000323/LER-2012-001, Regarding Failure to Meet Emergency Diesel Generator Technical Specifications
05000275/LER-2012-006, Regarding Violation of Technical Specifications Due to Incorrect Bases
05000275/LER-2012-004, Regarding Mode Transition with Turbine-Driven Auxiliary Feedwater Pump 1-1 Inoperable
05000424/LER-2012-002, Regarding Manual Reactor Trip Due to Circuit Board Failure
05000285/LER-2012-005-01, Regarding Technical Specification Violation Due to Inadequate Testing of Emergency Diesel Fuel Pumps
05000348/LER-2012-003, Regarding Unplanned a Train LOSP During SI with LOSP Testing
05000321/LER-2012-001, Regarding Non-Compliance with Technical Specification 3.9.4 for Control Rod Position Indication During Shutdown
05000454/LER-2012-001, Regarding Unit 2 Loss of Normal Offsite Power and Reactor Trip and Unit 1 Loss of Normal Offsite Power Due to Failure of System Auxiliary Transformer Inverted Insulators
05000275/LER-2011-007-01, Regarding Inadequate Control Room Envelope Testing Due to Inadequately - Documented In-leakage Test Data
05000366/LER-2011-003, Regarding Manual Reactor Scram During Startup Due to Too Few Operable Intermediate Range Monitors
05000285/LER-2011-003-03, Regarding Inadequate Flooding Protection Due to Ineffective Oversight
05000275/LER-2011-008, Regarding Control Room Ventilation System Design Vulnerability
05000275/LER-2011-005-01, 1 for Diablo Canyon Unit 1, Emergency Diesel Generator Actuations Upon Loss of 230 Kv Startup Due to Electrical Maintenance Testing Activities
05000275/LER-2011-006, For Diablo Canyon, Unit 1, Regarding Loss of Control Room Envelope Due to the Work Control Shift Foreman Incorrectly Authorizing Removal of a Blank Flange
05000285/LER-2011-004-01, Regarding Isolation of Both Trains of Safety Related Auxiliary Feedwater
05000285/LER-2011-004, Regarding Isolation of Both Trains of Safety Related Auxiliary Feedwater
05000275/LER-2011-002, For Diablo Canyon, Unit 1, Regarding Single Failure Vulnerability of Unit 1 & 2 Auxiliary Building Ventilation System
05000275/LER-2011-001, Regarding Mode Transition with Turbine-Driven Auxiliary Feedwater Pump 1-1 Inoperable
05000483/LER-2010-004, Regarding Unanalyzed Single Failure Component for Ultimate Heat Sink/Essential Service Water
05000483/LER-2009-005, Regarding Atmospheric Steam Dump Valves Inoperable for Time Greater than Allowed by Technical Specifications
05000454/LER-2009-002, Unit 1 Regarding Inadvertent Contact with Handswitch Results in an Automatic Reactor Trip of Unit 1
05000323/LER-2009-002, Technical Specification 3.7.1 Violation Due to Cracked Valve Spring
05000483/LER-2009-003, Turbine-Driven Auxiliary Feedwater Pump Inoperable During Mode Change from 4 to 3
05000483/LER-2009-004, Failure to Comply with Technical Specification 3.8.1 Required Action A.1 for One Offsite Circuit Inoperable
05000289/LER-2008-001, Regarding Decay Heat River Water System Pump (DR-P-1B) Failed to Start
05000454/LER-2006-002, Regarding All Refueling Water Storage Tank Level Instrumentation Channels Made Inoperable During a Single Channel Calibration Activity Due to a Design Flaw