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List of results

• 05000237/LER-1978-003, /03L-0 for Dresden, Unit 2 Re Inadequacies in the Implementation of Administrative or Procedural Controls Which Threaten to Cause Reduction of Degree of Redundancy Provided in Reactor Protection Systems  + (16:17:14, 8 January 2025)
• 05000237/LER-1978-034, /03L-0 for Dresden, Unit 2 Re During Normal Plant Operation Main Steam Line Temperature Isolation Switch 2-261-18A Initiated a Group I Isolation Signal on Channel a  + (16:17:16, 8 January 2025)
• 05000237/LER-1978-004-01, T-0 for Dresden, Unit 2 Re Improper 125V DC Cable Separation  + (16:17:19, 8 January 2025)
• 05000237/LER-1977-061, /03L-0 for Dresden, Unit 2 Re Reactor Protection System Instrument Settings Found to Be Less Conservative than Those Established by the Technical Specifications Which Do Not Prevent the Fulfillment of the Functional Requirement  + (16:17:21, 8 January 2025)
• 05000237/LER-1978-038, /03L-0 for Dresden, Unit 2 Re Temperature Isolation Switch 2-261-18C Initiated a Group I Isolation Signal on Channel a  + (16:17:22, 8 January 2025)
• 05000237/LER-1978-020, /03X-01 for Dresden, Unit 1 Re Cause of Failure of the Diesel Generator to Start  + (16:17:24, 8 January 2025)
• 05000237/LER-1978-036, /03L-0 for Dresden, Unit 2 Re a SBGT Failed to Start Upon Auto Initiation from a Spurious Reactor Bldg. Hi Rad Signal  + (16:17:25, 8 January 2025)
• 05000304/LER-1980-009, /03L-0 for Zion Re Conditions Leading to Operation in a Degraded Mode Permitted by a Limiting Condition for Operation or Plant Shutdown Required by a Limiting Condition for Operation Requires a 30 Day Written Report  + (16:17:27, 8 January 2025)
• 05000237/LER-1979-052, Regarding an Incident Where Fire Water Accumulated on the Mezzanine Floor Which Then Ran Down Into the U2 D/G Control Cabinet Via the D/G Room Vent Ductwork, Causing the Diesel Auto Start Block Alarm  + (16:17:29, 8 January 2025)
• 05000237/LER-1979-056, Regarding an Occurrence of the Closed Indication Light Bulb Socket Shorting While Replacing the Light Bulb  + (16:17:31, 8 January 2025)
• 05000237/LER-1979-061, /03L-0 for Dresden, Unit 2 Re Conditions Leading to Operation in a Degraded Mode Permitted by a Limiting Condition for Operation or Plant Shutdown Required by a Limiting Condition for Operation  + (16:17:32, 8 January 2025)
• 05000237/LER-1979-064, Regarding Discovery of Torus to Drywell Vacuum Breaker 2-1601-32F to Be Inoperable During Routine Operability Surveillance  + (16:17:34, 8 January 2025)
• 05000237/LER-1980-001, /03L-0 for Dresden, Unit 2 Re While Performing Weekly Turbine Control Valve Exercising, the 1/2 Scram on RPS Channel a Received from the Closure of 3 Turbine Control Valve Would Not Reset  + (16:17:36, 8 January 2025)
• 05000237/LER-1980-008, /03L-0 for Dresden, Unit 2 Re Equipment Operator Discovered Level in the 2/3 Diesel Generator Coolant Water Expansion Head Tank Overflowing Thru the Vent Line  + (16:17:37, 8 January 2025)
• 05000237/LER-1980-015, /03L-0 for Dresden, Unit 2 Re During Steady State Operation, Torus to Drywell Vacuum Breaker 2-1601-33A Was Found Inoperable During Routine Operability Surveillance  + (16:17:39, 8 January 2025)
• 05000237/LER-1980-017, /03L-0 for Dresden, Unit 2 Re Double Valve Indication Was Observed on the HPCI Inboard Isolation Valve. Upon Trying to Cycle the Valve, the Valve Failed to Close  + (16:17:40, 8 January 2025)
• 05000237/LER-1977-055, /03X-1 for Dresden, Units 2 and 3 Re Diesel Generator Auto Start Relays  + (16:17:42, 8 January 2025)
• 05000237/LER-1980-027, /03L-0 for Dresden, Unit 2 Re Dropping Load in Preparation for I.E.B. 80-17 Scram Tests, Low Level of Diesel Generator Coolant Present in the Water Tank Was Noticed by Equipment Operator  + (16:17:43, 8 January 2025)
• 05000237/LER-1980-033, /03L-0 for Dresden, Unit 2 Re the Frequency of Water Addition to the Torus Increased. Leak Rate Tests Indicated a Leak in the 2B LPCI Heat Exchanger  + (16:17:48, 8 January 2025)
• 05000237/LER-1980-036, /03L-0 for Dresden, Unit 2 Re Discovery That the Six Month Functional Test Required by Tech. Spec. 4.12.A.1 of the Cardox System Heat Detectors Was Not Performed within the Allowable Surveillance Interval  + (16:17:49, 8 January 2025)
• 05000237/LER-1980-016, /01T-1 for Dresden, Unit 2 Re While Shutdown and Conducting 300 Psi Primary System Hydrostatic Leak Inspection, Water Discovered Dripping from LPCI Check Valve Up Stream Drain Line  + (16:17:54, 8 January 2025)
• 05000237/LER-1979-017-01, X2 for Dresden, Units 2 and 3 Re Inadequacies Observed in Implementation of Administrative Procedural Controls Which Threaten to Cause Reduction of Degree of Redundancy Provided in Reactor Protection System or Engineered Saf  + (16:17:55, 8 January 2025)
• 05000237/LER-1980-039, /03X-1 for Dresden, Unit 2 Re HPCI Inboard Steam Supply Valve Opened and Had a Dual Light Indication  + (16:17:57, 8 January 2025)
• 05000237/LER-1980-041, /03L-0 for Dresden, Unit 2 Re Reactor Building Vent and Refueling Floor Rad Monitor Surveillance (DCP 2007-12) Was Performed  + (16:17:59, 8 January 2025)
• 05000237/LER-1980-042, /03L-0 for Dresden, Units 2 and 3 Re That Technical Staff Personnel Revealed That the Ultrasonic Testing of the Scram Discharge Volume Was Not Performed During the 1500-2300 Shift  + (16:18:00, 8 January 2025)

• 05000237/LER-1981-030, /01T-0 for Dresden, Unit 2 Re Operator Noticed the HPCI Steam Line Was Cold and Filled with Water. the HPCI System Was Declared Inoperable  + (16:18:02, 8 January 2025)

• 05000237/LER-1981-024, /03L-0 for Dresden, Unit 2 Re While Conducting Routine Review of Surveillance, It Was Found That the Monthly Surveillance Required by Tech. Spec. 4.4.c.1 for Standby Liquid Control Tank Sampling Was Three Days Overdue  + (16:18:03, 8 January 2025)
• 05000237/LER-1980-043, /03L-0 for Dresden, Unit 2 Re Surveillance Testing of the Condenser Low Vacuum Switches, Pressure Switch 2-503D Was Found to Have a Trip Point of 22.85 Inches Hg  + (16:18:07, 8 January 2025)
• 05000237/LER-1980-046, Regarding a Failure to Receive CRD Volume During a Reactor Scram  + (16:18:08, 8 January 2025)
• 05000237/LER-1980-050, /03L-0 for Dresden, Unit 2 Re the 1501-62D Pressure Switch Actuated at 44.2 Inches of Water Increasing, Tech. Spec. Limit Is Less than or Equal to 41.6 Inches of Water Increasing  + (16:18:11, 8 January 2025)
• 05000237/LER-1980-049, /03L-0 for Dresden, Unit 2 Re at Completion of Secondary Containment Leak Rate Test the Reactor Building Ventilation Isolation Valve 2A-5742 Would Not Open  + (16:18:13, 8 January 2025)
• 05000237/LER-1981-007, /03L for Dresden, Unit 2 Re While Conducting Steam Line Area Temperature Switch Calibration Surveillance, Temperature Switch TS 2-261-180 Failed to Trip  + (16:18:16, 8 January 2025)
• 05000237/LER-1978-041, /03L-0 for Dresden, Units 2 and 3 Re While Testing the Diesel Generator to Allow Monthly Inspection of Redundant Diesel the Thermal Overload for the Diesel Cooling Water Pump Tripped  + (16:18:18, 8 January 2025)
• 05000237/LER-1981-080, /031-0 for Dresden, Unit 2 Re Abnormal Degradation of Systems Other than Those Specified in Item B.1.e Above Designed to Contain Radioactive Material Resulting from the Fission Process  + (16:18:19, 8 January 2025)
• 05000237/LER-1981-011-03, L-0 for Dresden, Unit 2 Re Observed Inadequacies in the Implementation of Administrative or Procedural Controls Which Threaten to Cause Reduction of Degree of Redundancy Provided in Reactor Protection Systems or Engineered S  + (16:18:21, 8 January 2025)
• 05000237/LER-1981-015, /03L-0 for Dresden, Unit 2 Re the Fire Marshall Discovered That the Heat Detectors Were Not Functionally Tested within the 6 Month Interval Required by Tech. Spec. 4.12.A.1  + (16:18:23, 8 January 2025)
• 05000237/LER-1978-027, /03L for Dresden, Unit 2 Re a Sample Taken from Radwaste a WST at 1020 After the Tank Was Filled to 88%  + (16:18:33, 8 January 2025)
• 05000237/LER-1978-031, /03L-0 for Dresden, Unit 2 Re PS-2-1430-1466C Failed to Operate  + (16:18:34, 8 January 2025)
• 05000237/LER-1978-032, /03L-0 for Dresden, Unit 2 Re During Steady State Operation, Torus to Drywell Vacuum Breaker 2-1601-33E & F Were Found Inoperable During Routine Operability Surveillance  + (16:18:36, 8 January 2025)
• 05000237/LER-1980-024, /03L-0 for Dresden, Unit 2 Re Drywell Oxygen Concentration Indication Failed Downscale in Violation of Tech. Spec. 3.7.A.6.d  + (16:18:38, 8 January 2025)
• 05000237/LER-1978-035, /01T-0 for Dresden, Unit 2 Re During pre-installation Corrosion Inspection of Recently Purchased Spent Fuel Storage Racks, Cracks Through Weld Metal in Aluminum Channel to Base Plate Fillet Welds Were Found in 8 of 18 Racks  + (16:18:39, 8 January 2025)
• 05000237/LER-1977-047, /01T-0 for Dresden, Unit 2 Re During Refuel Outage 3 Cracks Were Found on CRD Return Nozzle Thermal Sleeve  + (16:18:41, 8 January 2025)
• 05000237/LER-1977-039, /03L-0 for Dresden, Unit 2 Re a Gasket Failure Was Found on Torus Drain Flange 313A Which Degraded the Primary Containment Boundary  + (16:18:43, 8 January 2025)
• 05000237/LER-1977-041, /03L-0 for Dresden, Unit 2 Re APRM 5 Was Found to Ino on 12 Instead of 11 LPRMs Bypassed as Required by T.S. 3.1.1  + (16:18:44, 8 January 2025)
• 05000237/LER-1977-045, /01T-0 for Dresden, Unit 2 Re While Preforming Leak Rate Testing Procedure Dts 1600-1, Measured Leakage for Reactor Feed Check Valves 2-220-58B&62B Were 1149 and 195 Scfh  + (16:18:46, 8 January 2025)
• 05000237/LER-1977-046, /03L-0 for Dresden, Unit 2 Re Two Snubbers 26 and 28 Drywell Were Found to Have Less than the Required Amount for Fluid, Thus Questioning Their Operability  + (16:18:48, 8 January 2025)
• 05000237/LER-1977-043, /03L-0 for Dresden, Unit 2 Re Drywell Hi Pressure Switch PS2-1501-62A Tripped at 42.9 H20 Increasing Pressure  + (16:18:49, 8 January 2025)
• 05000237/LER-1977-044, /03L-0 for Dresden, Unit 2 Re Conditions Leading to Operations in a Degraded Mode Permitted by a Limiting Condition for Operation  + (16:18:51, 8 January 2025)
• 05000237/LER-1977-049, /01T-0 for Dresden, Unit 2 Re Discovery During Plant Life of Conditions Not Specifically Considered in the Safety Analysis Report or Technical Specifications That Require Corrective Measures to Prevent the Existence of Unsafe C  + (16:18:52, 8 January 2025)
• 05000237/LER-1977-050, /03L-0 for Dresden, Unit 2 Re Local Leak Rate Test of Drywell Personnel Air Lock During Refueling  + (16:18:54, 8 January 2025)
• 05000237/LER-1977-057, /01T-0 for Dresden, Unit 2 Re While in Refuel Mode During Refueling, CRD D-2 Select Switch Allowed Two Drives to Be Simultaneously Selected Defeating the Refuel Mode one-rod-permissive, Contrary to T.S. 3.10.D.1  + (16:18:56, 8 January 2025)