Pages that link to "05000336/LER-2006-001, Loss of Charging Function"
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The following pages link to 05000336/LER-2006-001, Loss of Charging Function:
Displayed 10 items.
- 05000336/LER-2006-001 (redirect page) (← links)
- 05000336/LER-2010-003 (← links)
- 05000336/LER-2006-005 (← links)
- 05000289/LER-2006-001 (← links)
- 05000336/LER-2002-002 (← links)
- 05000336/LER-2001-007 (← links)
- 05000336/LER-2001-006 (← links)
- 05000336/LER-2001-005 (← links)
- 05000336/LER-2001-004 (← links)
- 05000336/LER-2001-003 (← links)
- 05000336/LER-2001-001 (← links)
- 05000301/LER-2006-002 (← links)
- 05000255/LER-2006-001 (← links)
- IR 05000336/2006004 (← links)
- ML060760174 (redirect page) (← links)
- 05000336/LER-1982-022, Forwards LER 82-022/03L-0 (← links)
- 05000336/LER-1982-024, Forwards LER 82-024/03L-0 (← links)
- 05000336/LER-1982-021, Forwards LER 82-021/03L-0 (← links)
- 05000336/LER-1982-018, Forwards LER 82-018/03L-0 (← links)
- 05000336/LER-1982-019, Forwards LER 82-019/99X-0.Detailed Event Analysis Encl (← links)
- 05000336/LER-1982-017, Forwards LER 82-017/03L-0 (← links)
- 05000336/LER-1982-016, Forwards LER 82-016/01T-0 (← links)
- 05000336/LER-1982-015, Forwards LER 82-015/03L-0 (← links)
- 05000336/LER-1982-014, Forwards LER 82-014/03L-0 (← links)
- 05000336/LER-1982-007, Forwards LER 82-007/03L-0 (← links)
- 05000336/LER-1982-005, Forwards LER 82-005/03L-0 (← links)
- 05000336/LER-1982-006, Forwards LER 82-006/03L-0 (← links)
- 05000336/LER-1982-040, Forwards LER 82-040/03L-0 (← links)
- 05000336/LER-1982-038, Forwards LER 82-038/03L-0.Detailed Event Analysis Encl (← links)
- 05000336/LER-1982-039, Forwards LER 82-039/03L-0 (← links)
- 05000336/LER-1993-007, Incorporates NRC Comments Discussed During 940324 Telcon Into 931217 Application for Amend to License DPR-65,revising TS 3.8.1.1,as Result of LER 93-007-00,dtd 930428 & Util 930726 Response to NOV from Insp Rept 50-336/93-81 (← links)
- 05000336/LER-1982-036, Forwards LER 82-036/03L-0 (← links)
- 05000336/LER-1981-005, Forwards LER 81-005/03L-0 (← links)
- 05000336/LER-1978-031, Forwards LER 78-031/03L-0 (← links)
- 05000336/LER-1978-030, Forwards LER 78-030/03L-0 (← links)
- 05000336/LER-1982-046, Forwards LER 82-046/03L-0 (← links)
- 05000336/LER-1982-047, Forwards LER 82-047/03L-0 (← links)
- 05000336/LER-1982-037, Forwards LER 82-037/03L-0 (← links)
- 05000336/LER-1982-035, Forwards LER 82-035/03L-0 (← links)
- 05000336/LER-1982-034, Forwards LER 82-034/03L-0 (← links)
- 05000336/LER-1982-020, Forwards LER 82-020/03L-0 (← links)
- 05000336/LER-1979-014, Forwards LER 79-014/03X-2 (← links)
- 05000336/LER-1982-033, Forwards LER 82-033/03L-0 (← links)
- 05000336/LER-1982-030, Forwards LER 82-030/03L-0 (← links)
- 05000336/LER-1982-031, Forwards LER 82-031/03L-0 (← links)
- 05000336/LER-1982-029, Forwards LER 82-029/03L-0 (← links)
- 05000336/LER-1982-028, Forwards LER 82-028/03L-0.Detailed Event Analysis Encl (← links)
- 05000336/LER-1983-013, Forwards LER 83-013/03L-0 (← links)
- 05000336/LER-1983-003, Forwards LER 83-003/03L-0.Detailed Event Analysis Encl (← links)
- 05000336/LER-1983-004, Forwards LER 83-004/03L-0 (← links)
- 05000336/LER-1982-041, Forwards LER 82-041/03L-0 (← links)
- 05000336/LER-1994-003, Application for Amend to License DPR-65,incorporating Addl Requirements Into TS Re non-QA Equipment Utilized to Achieve Feedwater Isolation in Response to MSLB Inside Containment, Per Commitment Made in LER 94-003-00 & Listed I (← links)
- 05000336/LER-1982-053, Forwards LER 82-053/03L-0 (← links)
- 05000336/LER-1982-052, Forwards LER 82-052/03L-0.Detailed Event Analysis Encl (← links)
- 05000336/LER-1983-009, Forwards LER 83-009/01T-0 (← links)
- 05000336/LER-1983-005, Forwards LER 83-005/03L-0 (← links)
- 05000336/LER-1983-010, Forwards LER 83-010/03L-0.Detailed Event Analysis Encl (← links)
- 05000336/LER-1983-008, Forwards LER 83-008/01T-0 (← links)
- 05000336/LER-1980-012, Forwards Updated LER 80-012/03X-1 (← links)
- 05000336/LER-1981-011, Forwards Updated LER 81-011/03X-1 (← links)
- 05000336/LER-1981-018, Forwards Updated LER 81-018/03X-2 (← links)
- 05000336/LER-1981-036, Forwards Updated LER 81-036/03X-1 (← links)
- 05000336/LER-1983-006, Forwards LER 83-006/03L-0 (← links)
- 05000336/LER-1983-002, Forwards LER 83-002/03L-0 (← links)
- 05000336/LER-1982-026, Forwards LER 82-026/03L-0 (← links)
- 05000336/LER-1982-044, Forwards Updated LER 82-044/03X-1 (← links)
- 05000336/LER-1997-008, Forwards LER 97-008-00,documenting Event Occurred at Unit 2 on 970310.Commitments Made within Ltr Listed as Submitted (← links)
- 05000336/LER-1997-007, Provides List of Commitments for LER 97-007-00 Re Event That Occurred on 970308 (← links)
- 05000336/LER-1997-006, Forwards LER 97-006-00 Which Documents an Event That Occurred on 970211.Commitments Made within Ltr,Listed (← links)
- 05000336/LER-1997-005, Forwards LER 97-005-00 Which Documents Event That Occurred at Mnps,Unit 2 on 970204.Commitments Made,Listed (← links)
- 05000336/LER-1997-019, Forwards LER 97-019-00,documenting Event Occurred at Unit 2 on 970422.Commitment Listed (← links)
- 05000336/LER-1997-017, Forwards LER 97-017-00 Which Documents Event That Occurred at Mnps,Unit 2 on 970417.Commitment Made within Ltr,Listed (← links)
- 05000336/LER-1997-010, Forwards LER 97-010-00,documenting Event Occurred at Unit 2 on 970112.Commitments Made within Ltr Listed (← links)
- 05000336/LER-1992-003, Requests 10-day Extension to File Contentions Re Spent Fuel Pool Design Specs (Ref LER 92-003-00) at Plant.W/Certificate of Svc.Served on 920819 (← links)
- 05000336/LER-1997-021, Forwards LER 97-021-00,documenting an Event That Occurred on 970423,per 10CFR50.73(a)(2)(ii).Commitments Made within Ltr, Submitted (← links)
- 05000336/LER-1997-018, Forwards LER 97-018-00 Which Documents an Event That Occurred at Mnps,Unit 2 on 970421.Commitments Made within Ltr,Submitted (← links)
- 05000336/LER-1997-016, Forwards LER 97-016-00 Per 10CFR50.73(a)(2)(i)(B).Also Includes Commitments Made in Ltr (← links)
- 05000336/LER-1997-015, Forwards LER 97-015-00 Per 10CFR50.73(a)(2)(v).Also Includes Commitments Made in Ltr (← links)
- 05000336/LER-1997-014, Forwards LER 97-014-00 Which Documents an Event That Occurred on 970415.Commitments Made within Ltr,Submitted (← links)
- 05000336/LER-1997-012, Forwards LER 97-012-00 Which Documents an Event That Occurred at Mnps,Unit 2 on 970410.Commitments Made within Ltr,Submitted (← links)
- 05000336/LER-1997-009, Forwards LER 97-009-00,which Documents an Event That Occurred on 970325.Commitments Made within Ltr,Submitted (← links)
- 05000336/LER-1997-011, Forwards LER 97-011-00,documenting Event Occurred at Unit 2 on 970402.Commitments Made within Ltr Listed (← links)
- 05000336/LER-1997-002, Forwards LER 97-002-00 Which Documents an Event That Occurred on 970108,per 10CFR50.73(a)(2)(ii).Commitments Made within Ltr,Listed (← links)
- 05000336/LER-1996-043, Fowards LER 96-043-00,documenting Event That Occurred at Millstone Nuclear Power Station,Unit 2 on 961231.Util Commitments Made within Ltr,Listed (← links)
- 05000336/LER-1996-042, Forwards LER 96-042-00,documenting an Event That Occurred at Millstone Nuclear Power Station,Unit 2 on 961218.Commitments Made within Ltr (← links)
- 05000336/LER-1996-041, Forwards LER 96-041-00,documenting Event at Plant on 961217.Commitments Made Re Event Listed (← links)
- 05000336/LER-1996-040, Forwards LER 96-040-00,documenting Event That Occurred at Mnps,Unit 2 on 961212.Commitment Made within Ltr,Listed (← links)
- 05000336/LER-1996-039, Forwards LER 96-039-00 Which Documents Event That Occurred at Mnps,Unit 2 on 961106.Commitment Made within Ltr,Listed (← links)
- 05000336/LER-1996-038, Forwards LER 96-038.Commitments Made Re LER Submitted (← links)
- 05000336/LER-1996-035, Forwards LER 96-035-00,documenting Occurrence on 961009. Commitments Listed (← links)
- 05000336/LER-1979-040, Forwards LER 79-040/03L-0 (← links)
- 05000336/LER-1998-020, Forwards LER 98-020-00 Re SI Recirculation Header Piping Components Not Fully Satisfying ISI Requirements IAW ASME Code Section XI Criterion.Commitments Made within Ltr Also Encl (← links)
- 05000336/LER-1998-021, Forwards LER 98-021-00,documenting Condition That Was Discovered at Mnps,Unit 2,on 980825.Commitments Made by Util,Encl (← links)
- 05000336/LER-1998-019, Forwards LER 98-019-00,re Potential Inability to Close AFW Regulator Valves After Helb,Discovered on 980826.Util Commitments,Encl (← links)
- 05000336/LER-1998-018, Forwards LER 98-018-00,re Condition That Was Discovered at Millstone Unit 2 on 980818.Commitments Made by Util Also Encl (← links)
- 05000336/LER-1997-025, Forwards LER 97-025-00 Which Documents Event That Occurred at Mnps,Unit 2 on 910828.Submittal Delayed Due to Inadequate Review of Event at Time of Discovery.Commitments Made by Util,Listed (← links)
- 05000336/LER-1998-024, Forwards LER 98-024-00 Re 981030 Potential Leakage Path Through Containment Pressure Instrument.Commitments Made by Util,Encl (← links)
- 05000336/LER-1998-023, Forwards LER 98-023-00,re Failure to Adequately Test Containment Air Recirculation Fans IAW TS SR 4.6.2.1.2(a) on 980924.LER Submitted Beyond 30-day Discovery Time Period. Licensee Commitments Also Included (← links)
- 05000336/LER-1997-034, Forwards LER 97-034-00 Which Documents Condition That Was Identified at Mnps,Units 2 on 971029.Commitments Made within Ltr Listed (← links)
- 05000336/LER-1998-025, Forwards LER 98-025-00,documenting Condition Discovered at Mnps,Unit 2,on 981111.Commitments Made by Util,Encl (← links)
- 05000336/LER-1997-036, Forwards LER 97-036-00,which Describes Event That Occurred at Facility on 971117.Commitments Made within Ltr Listed (← links)
- 05000336/LER-1997-035, Forwards LER 97-035-00,documenting Event That Occurred at Millstone,Unit 2 on 971111.Listed Commitments Made within Ltr (← links)
- 05000336/LER-1998-026, Forwards LER 98-026-00,re Exceeded Pressurizer Spray Line Fatigue Limits Due to Insufficient Thermal Effects Analysis. Commitments Made within Ltr,Encl (← links)
- 05000336/LER-1984-005, Confirms That Rev to LER 84-005 Will Be Submitted within 2 Months,Clarifying Performance of Type A,B & C Testing During 1983 Refueling Outage as Discussed in 860604 Meeting (← links)
- 05000336/LER-1997-032, Forwards LER 97-032-00 Which Documents Event That Occurred at Mnps,Unit 2 on 970922.Commitment Made within Ltr,Listed (← links)
- 05000336/LER-1997-031, Forwards LER 97-031-00 Which Documents Event That Occurred at Mnps,Unit 2 on 970918.Commitments Made within Ltr Listed (← links)
- 05000336/LER-1998-016, Forwards LER 98-016-00,which Discusses Inadequate Administrative Controls on Safety Injection Valve. Commitments Made within Rept,Encl (← links)
- 05000336/LER-1998-013, Forwards LER 98-013-00,re Event Which Occurred at Millstone Unit 2 on 980526.Commitments Made within Ltr,Encl (← links)
- 05000336/LER-1998-012, Forwards LER 98-012-00,re Event Which Occurred at Millstone Unit 2 on 980521.Commitments Made within Ltr,Encl (← links)
- 05000336/LER-1998-011, Forwards LER 98-011-00,documenting Event That Occurred at Unit 2 on 980502.Util Commitments Made within Ltr Included in Attachment 1 (← links)
- 05000336/LER-1998-010, Forwards LER 98-010-00,documenting Event That Occurred at Unit 2 on 980508.Util Commitments Made within Ltr Included in Attachment 1 (← links)
- 05000336/LER-1998-009, Forwards LER 98-009-00,documenting Event Which Occurred at Millstone Unit 3 on 980501.Commitments Made within Ltr,Encl (← links)
- 05000336/LER-1998-008, Forwards LER 98-008-00,re Event Which Occurred at Millstone Unit 2,on 980423,per 10CFR50.73(a)(2)(i).Commitments Made within Ltr,Encl (← links)
- 05000336/LER-1998-007, Forwards Corrected LER 98-007-00,documenting Event Which Occurred at Millstone Unit 2 on 980408.LER Is Being Resubmitted Due to Omission of Rept Date on Original Submittal.Commitments Made within Ltr,Encl (← links)
- 05000336/LER-1998-006, Forwards LER 98-006-00,documenting Event That Occurred at Millstone Nuclear Power Station,Unit 2 on 980327.LER Being Submitted Per 10CFR50.73(a)(2)(ii).NNECOs Commitments Made within Ltr Listed (← links)
- 05000336/LER-1998-015, Forwards LER 98-015-00,re Condition Discovered at Millstone Unit 2 on 980504.Commitments Made within Ltr,Encl (← links)
- 05000336/LER-1997-027, Forwards LER 97-027-00,documenting Event That Occurred at Unit 2 on 970802.Commitment,listed (← links)
- 05000336/LER-1998-003, Forwards LER 98-003-00,documenting Event That Occurred at Unit 2 on 980113.Util Commitments Made within Ltr Included in Attachment 1 (← links)
- 05000336/LER-1997-030, Forwards LER 97-030-00,documenting Event That Occurred at Unit 2 on 970830.Util Commitments Listed in Ltr (← links)
- 05000336/LER-1997-026, Forwards LER 97-026-00,documenting Event That Occurred at Facility on 970729.Commitments Made within Ltr,Listed (← links)
- 05000336/LER-1982-027, Forwards LER 82-027/03L-0 (← links)
- 05000336/LER-1982-025, Forwards LER 82-025/03L-0 (← links)
- 05000336/LER-1982-023, Forwards LER 82-023/03L-0 (← links)
- 05000336/LER-2024-001, Control Room Air Conditioning Unit Inoperable Due to Refrigerant Overcharge Resulting in a Condition Prohibited by Technical Specifications (← links)
- 05000336/LER-2023-002, Failed Check Valve Resulted in an Unanalyzed Condition (← links)
- 05000336/LER-2023-001, For Millstone, Unit 2, Structural Integrity of a Train Service Water Header Piping Could Not Be Demonstrated Causing the Unit to Operate in a Condition Prohibited by Technical Specifications (← links)
- 05000336/LER-2022-001, Structural Integrity of Reactor Building Component Cooling Water Cracked Threaded Fitting Could Not Be Established Resulting in System Inoperable Longer than Allowed by Technical Specifications (← links)
- 05000336/LER-2021-002, Failed Check Valve Resulting in Unnalyzed and Operation Prohibited by Technical Specifications (← links)
- 05000336/LER-2021-001, Incorrectly Placed Spent Fuel Assemblies in Unit 2 Spent Fuel Pool (← links)
- 05000336/LER-1998-013-01, :on 980526,shutdown Cooling Sys Was Over Pressurized by Inadvertent Hpsip Start.Caused by Inadequate Evaluation in Original Plant Design.Appropriate Actions Were Taken to Ensure Sys Complies W/Design & Licensing Basis (← links)
- 05000336/LER-1998-012-01, :on 980521,nonconservative Assumptions in Facility Loss of Normal FW Analysis Was Noted.Caused by Incorrect Calculation of SG Inventory During Lonf Event. Reanalysis of FSAR Loss of Normal FW Analysis Was Completed (← links)
- 05000336/LER-1998-011-01, :on 980519,determined That Valves Had Been Closing Completely Under No Flow Conditions.Caused by Improper Valve Setup & Failure to Verify Adequate Valve Closure.Valves Disassembled (← links)
- 05000336/LER-1998-010-01, :on 980508,discovered That Encl Bldg Surveillance Procedure Did Not Adequately Verify Leak Integrity of Encl B.Caused by Inadequate Evaluation of Phenomenon Described in NRC Info Notice.Amend Implemented (← links)
- 05000336/LER-1989-004, :on 890320,visual Insp of Mechanical Plug Revealed Circumferential Cracking at Top of Plug.Caused by Primary Water Stress Corrosion Cracking.Tube Replugged W/New Mechanical Tube Plug (← links)
- 05000336/LER-1988-003, :on 880130,inadvertent Automatic loss-of-normal Power Actuation Occurred on Two of Engineered Safeguards Actuation Sys.Immediate Cause Not Apparent.Wiring Error Identified & Corrected (← links)
- 05000336/LER-1998-009-01, :on 980501,LBLOCA Analysis Indicates Peak Clad Temp Could Exceed 2200 Degrees F.Caused by Failure to Identify Excessive Variability.Reanalyzed LBLOCA Using Current & Corrected Evaluation Models (← links)
- 05000336/LER-1986-007-01, :on 860901,during Monthly Control Room Surveillance Check,Steam Generator 1 Level Indication on Remote Shutdown Panel Indicated Zero Percent.Caused by Failure of Amplifier Assembly (← links)
- 05000336/LER-1987-003, :on 870129,reanalysis of Steam Generator Tube Exam Data Identified That One Tube Which Contained Repairable Defect,Not Been Repaired,As Required by Tech Spec 4.4.5.1.4.b.Defective Tubes Plugged (← links)
- 05000336/LER-1998-008-01, :on 980423,TS Violations Were Noted.Caused by Failure to Achieve Compliance to TS Requirements.Revised Appropriate Surveillance Procedures (← links)
- 05000336/LER-1998-007-02, :on 980408,reanalysis of Ms Line Break Indicated Possible Fuel Failures.Cause Is Under Investigation.Siemens Analysis Will Be Completed Prior to Entering Mode 4 from Current Outage (← links)
- 05000336/LER-1987-010-01, :on 870730,inadequacies Identified in Fire Protection Coating on Raceway Support Structures in Main Cable Vault & Hallway Leading to Charging Pumps.Hourly Fire Watch Started & Automatic Sprinkler Installed (← links)
- 05000336/LER-1987-007, :on 870416,reactor Tripped Automatically Due to Turbine Trip Caused by Generator Exciter Field Breaker Opening.Caused by Generator Volts/Hertz Relay Actuation. Emergency Operating Procedure 2525 & 2526 Done (← links)
- 05000336/LER-1989-007, :on 890613,condensate Polishing Facility Radiation Monitor 2-CND-RE-245 Operated W/O Source Check. Caused by Personnel Error.No Corrective Action Taken as Check Added to Procedure Before Violation (← links)
- 05000336/LER-1997-022-03, Forwards LER 97-022-03,documenting Event That Occurred at Millstone Nuclear Power Station,Unit 2 on 970602.LER Suppl Provides Update on Results of Analyses & Investigation.Util Commitments Made within Ltr Included in Attachm (← links)
- 05000336/LER-1989-005-02, :on 890330,automatic Test Insertion (ATI) Module Connector Did Not Mate Smoothly W/Engineered Safeguard Actuation Sys Cabinet Socket Resulting in Safety Injection Actuation Signal Actuation (← links)
- 05000336/LER-1988-008, :on 880408,control Element Assembly (CEA) 22 Dropped Into Core & on 890409,CEA 4 Dropped Into Core.Caused by Overheating of Upper Gripper Coil Due to Air Flow Blockage of Hx.Coils & Loose Wire Replaced (← links)
- 05000336/LER-1988-006, :on 880218,local Leak Rate Testing Determined Combined Bypass Leakage Exceeded Tech Spec 3.6.1.2.C Limit. Caused by Debris Being Lodged in Seat Area of Valve.Duplex Strainer Installed in Piping Sys (← links)
- 05000336/LER-1998-007-01, :on 980408,noted That non-conservative Assumptions May Result in Violation of Fuel Centerline Temp Fuel Design Limit.Caused Indeterminate.Will Complete Siemens Analysis Prior to Entering Mode 4 from Current Outage (← links)
- 05000336/LER-1998-006-01, :on 980327,reactor Bldg Closed Cooling Water Sys Outside Design Upon Loss of Svc Water Occurred.Caused by Inadequate Consideration of All Postulated Single Failure Events.Procedures Will Be Implemented (← links)
- 05000336/LER-1989-007-02, :on 890613,condensate Polishing Facility Radiation Monitor Operated W/O Conducting Source Check. Caused by Personnel Error.No Corrective Action Taken as Source Check Added to Procedure Prior to Event (← links)
- 05000336/LER-1988-011, :on 881025,loss of Normal Power on Both 4160-volt Vital Ac Buses Caused Reactor Trip & ESF Actuation.Caused by Personnel Error.Procedure Rewritten to Assure Proper Use of Ground & Test Devices (← links)
- 05000336/LER-1989-004-01, :on 890320,visual Insp of Mechanical Tube Plug Showed Indications of Circumferential Cracking at Top of Plug,Above Expander.Caused by Cracking Induced by Primary Water Stress Corrosion Cracking.Tube Removed (← links)
- 05000336/LER-1989-006, :on 890510,operator Attention Drawn to Trouble Rept Associated W/Valve 1-EB-91.Also on 890516,determined That Unit Operated Outside Tech Specs 3.6.3.1 Requirements. Caused by Personnel Error.Operators Instructed (← links)
- 05000336/LER-1997-020, :on 970423,noted Failure to Verify Boron Injection Flow Path.Caused by Failure to Properly Incorporate TS SRs Into Plant Surveillance Procedures.Will Revise Appropriate Surveillance Procedures (← links)
- 05000336/LER-1997-020-03, Forwards LER 97-020-03,documenting Condition That Was Discovered at Mnps,Unit 2,on 970423.LER Supplements Update on Analyses & Investigation of Condition.Commitments Made by Util Are Included in Attachment 1 (← links)
- 05000336/LER-1987-011, :on 870723,automatic Reactor Trip Occurred. Caused by Low Level in Steam Generator 1.Spray Valve 2-RC-100F Repaired & Pdic 5270 Replaced (← links)
- 05000336/LER-1998-005, :on 980318,HELB Deficiencies for Piping Inside Containment Was Noted.Caused by Inadequate Consideration of HELB Requirements.Rept Was Submitted to NRC Discussing Applicability of leak-before-break Methodology (← links)
- 05000336/LER-1998-005-01, Forwards LER 98-005-01 Re HELB Deficiencies for Piping Inside Containment on 980318.Commitments,encl (← links)
- 05000336/LER-1987-012-01, :on 871116,reactor Tripped on Low Steam Generator Level.Caused by Failure of Feedwater Regulating Valve to Respond to Closing Signals from Control Board in Automatic or Manual Modes (← links)
- 05000336/LER-1998-016-01, :on 980708,inadequate Adminstrative Controls on Safety Injection Valve Were Noted.Caused by Failure in 1976 to Understand & Implement Requirement to Close Valve 2-SI-459 within Time Limit.Revised Appropriate Procedures (← links)
- 05000336/LER-1998-015-01, :on 980504,channel Functional Testing of Digital Radiation Monitors Did Not Comply W/Ts.Caused by Inadequate Evaluation of Adequacy of Test Methodology. Procedure Changes Will Be Implemented (← links)
- 05000336/LER-1998-014, :on 980629,plant Procedures Violated CR Ventilation Boundary.Caused by Misinterpretation of 10 Minute Allowance for Verifying One Complete Train of Crac. Addl Review & Analysis Will Be Performed to Determine C/As (← links)
- 05000336/LER-1989-003, :on 890209,leakage Test of Charging Sys Penetration 3 Caused Combined Leakage Rate of Spec 3.6.1.2.b to Be Exceeded & Test Vol Could Not Be Pressurized to Pa for Testing.Caused by Sticking Valve Packing (← links)
- 05000336/LER-1989-002-02, :on 890204,six of Sixteen Valves Tested Failed Initial Simmer Test.Cause Unknown.One Valve Passed Next Two Consecutive Tests W/O Further Adjustment.Four Valves Adjusted in Place (← links)
- 05000336/LER-1989-001-02, :on 890202,inoperability of Two Fire Barrier Cable Penetration Seals Which Had Been Permanently Resealed Determined.Caused by Personnel Error.Roving Hourly Fire Watch Initiated (← links)
- 05000336/LER-1987-008-02, :on 870611,scheduling Error Discovered W/ Battery Surveillance 2736B-1,due on 870406.Surveillance Performed on 870506.Maint Dept Surveillance Scheduling Procedure Changed (← links)
- 05000336/LER-1987-004, :on 870202 & 0208,automatic Actuations of Emergency Safeguards Actuation Sys Resulted in Containment Purge Valve Isolations.Caused by Broken Window on Beta Scintillation Detector.Detector Replaced (← links)
- 05000336/LER-1997-033-01, Forwards LER 97-033-01,documenting Event That Occurred at Millstone Nuclear Power Station,Unit 2 on 970727.LER Submitted Per 10CFR50.73(a)(2)(ii) & 10CFR50.73(a)(2)(v) (← links)
- 05000336/LER-1999-012, :on 990917,unrecoverable CEA Misalignment Entry Into TS 3.0.3 Was Noted.Caused by Grounded Coil Wire for Lower Gripper Assembly.Leads Leading to Lower Gripper Coil Were Insulated (← links)
- 05000336/LER-1998-004-02, :on 980316,auxiliary Feedwater Pump Performance Was Degraded.Cause of Condition Is Unknown.Pump Will Be Returned to Operable Status Prior to Mode 3 from Current Outage (← links)
- 05000336/LER-1997-022-01, Forwards LER 97-022-01 Which Documents Multiple Deficient Conditions Identified at Mnps,Unit 2,during Detailed Review of Units TS to Address Commitment B16076-2.List of Commitments Made within Ltr,Provided (← links)
- 05000336/LER-1997-027-02, :on 970802,unplanned Automatic Start of a EDG Occurred While Troubleshooting.Caused by Inadequate Detailed Instructions for Preparation,Review & Approval of Troubleshooting Plant.Established Adequate Measures (← links)
- 05000336/LER-1997-014-01, :on 970415,insufficient RBCCW Flow to HPSI Was Noted.Cause Unknown.Rbccw Sys Supplies Pump Seal Cooler W/ Cw,Providing Heat Removal to Ultimate Heat Sink Via Sws (← links)
- 05000336/LER-1998-003-02, :on 980113,inadequate Evaluation Between Reactor Internals & Rv Occurred.Caused by Inadequate Design Review.Appropriate Structural Analyses Revised (← links)
- 05000336/LER-1986-009-02, :on 860929,automatic Actuation of ESF Sys Occurred.Caused by Personnel Error.On 861010,automatic Actuation of ESF Sys Occurred,Resulting in Containment Purge Isolation Signal.Caused by Noise Spike (← links)
- 05000336/LER-1986-008-02, :on 860920,6 of 16 Valves Failed Main Steam Safety Valve Simmer Test.Caused by Setpoint Drift.Increased Accuracy Pressure Gauges Used to Reduce Test Error & Spring & Ambient Temps Recorded (← links)
- 05000336/LER-1987-006-01, :on 870403,during Mode 1,inconsistency Noted Between FSAR Table for Svc Water Flow Thru Reactor Bldg Closed Cooling Water HX & Calculated Design Flow.Cause Unknown.Fsar Revised (← links)
- 05000336/LER-1986-017-02, :on 861105,loss of Power Event Occurred When Main Generator Relay Returned to Svc.Caused by Personnel Error in Failing to Follow Procedure Warning Not to Reset Relay Target W/Relay Plugged in (← links)
- 05000336/LER-1986-016-01, :on 861104,sufficient Number of Steam Generator Tubes Discovered to Have Flaws Greater than 40% through-wall to Place Generators in Category C-3 of Tech Spec Table 4.4-6.Defective Tubes Repaired Per Tech Specs (← links)
- 05000336/LER-1986-014-01, :on 861029,automatic Actuation of ESF Sys Occurred Resulting in Containment Purge Isolation Signal. Caused by Noise Spike in Radiation Monitor 8123A.Signals Reset & Purging Reinitiated (← links)
- 05000336/LER-1987-007-01, :on 870416,automatic Trip from 100% Power Operation Occurred.Caused by Actuation of Generator Volts/ Hertz Relay 59X1.Reason for Actuation of Relay Unknown. Relay Removed from Svc (← links)
- 05000336/LER-1986-013-01, :on 861010,safety Injection Tank a Level Instrument Determined to Be Out of Spec.Caused by Transmitter Experiencing Zero Shift to Low Side.Level Transmitter Replaced (← links)
- 05000336/LER-1986-012-01, :on 861009,leakage Test of Containment Penetration 14,inside Valve 2-SSP-16.1,reported Leakage Rate in Excess of Limiting Condition for Operation 3.6.1.2.c. Caused by Debris Under Valve Seat (← links)
- 05000336/LER-1986-010-02, :on 861006,inconsistency Identified Between Safety Analysis for Control Element Assembly (CEA) & Tech Specs for Modes 3,4 & 5.Caused by Assumption That Hot Zero Power Results for CEA Withdrawn (← links)
- 05000336/LER-1986-011, :on 861004,fire Watch Log Indicated That Area Requiring Hourly Insp Not Logged & on 861012,inoperable Fire Damper Reported.Caused by Personnel Error.Involved Fire Areas Inspected (← links)
- 05000336/LER-1986-022-01, :on 861223,reactor Tripped Due to Low Water Level in Steam Generator 1.Caused by Improperly Installed Bus Voltage Potential Transformer Drawer.Drawer & Cover Realigned & Reinstalled Squarely W/Bolts (← links)
- 05000336/LER-1999-011, :on 990823,thermal Reactor Power Limit Was Exceeded.Caused by Lack of Conservatism in Procedures & Alarm Setpoints Used to Limit Reactor Power.Revised Operating Procedures (← links)
- 05000336/LER-1987-003-01, :on 870129,reanalysis of Steam Generator Tube Exam Data Identified Tube Containing Repairable Defect. Caused by Incorrect Recording of Original Test.Tube Retested & Analyzed (← links)
- 05000336/LER-1997-033-02, :on 970727,design Deficiencies Were Identified W/Esas Actuation Cabinet Power Supplies & Associated Fuses. Cause Under Investigation.Event Review Team Was Established to Investigate Cause of Design Deficiencies (← links)
- 05000336/LER-1997-032-02, :on 970922,identified That Two of Sixteen Valves Failed to Open within TS Allowable Lift Set Pressures.Cause of Setpoint Drift Unknown.Valves Will Be Rebuilt,Set to Required Set Pressures & Tested (← links)
- 05000336/LER-1997-031-02, :on 970918,discovered That Potential Effects on safety-related Equipment Were Located Outside Containment. Caused by Helbs.Present Pipe Associated W/Postulated HELB Will Be Evaluated (← links)
- 05000336/LER-1986-015-01, :on 861114,diesel Generator Differential Relays Not Seismically Qualified for Class IE Svc.Caused by Installation of Nonqualified Relays.Relays Removed from Svc & Replaced (← links)
- 05000336/LER-1986-019-02, :on 861113,discovered That Three Fire Dampers Not on Required Surveillance Form.Caused by Dampers Not Being Placed on Plant Operations Critical Drawing.Fire Dampers Immediately Inspected (← links)
- 05000336/LER-1986-004-01, :on 860601,reactor Trip Occurred Due to Reactor Coolant Pump Underspeed.Caused by Loss of Power to Bus 25B. Increase in Time Delay in Eight Applicable Time Delay Agastat Relays Will Be Evaluated (← links)
- 05000336/LER-1999-010, :on 990804,noted Failure to Perform ASME Section XI IST on Pressurizer Relief Line Flow Control Sample Valve.Caused by Inadequate man-machine Interface. Planning Personnel Will Be Briefed on QC Program Indicators (← links)
- 05000336/LER-1997-030-02, :on 970830,determined That EDG Skid Mounted Piping & Tubing May Not Maintain Structural Integrity During EDG Operation.Caused by non-conforming Partial Penetration Tubing Welds.Edgs Will Be Reworked & Restored (← links)
- 05000336/LER-1986-006, :on 860903,reactor Automatically Tripped on Low Steam Generator Level as Result of Loss of Heater Drains Flow.Probably Caused by Failure of Signal Air Tubing.Tubing & Fittings Replaced (← links)
- 05000336/LER-1997-026-02, :on 970729,invalid ESAS Actuation Occurred While Shifting from Normal to Reserve Station Transformers. Caused by Inadequate Review of Components.Briefed Operations Personnel Re Need to Analyze Equipment (← links)
- 05000336/LER-1986-003, :on 860516,evaluation of Fire Dampers Revealed 20 Dampers Either Improperly Installed or Improperly Rated for Fire Zone.Fire Dampers Either Replaced or Modified.Plant Design Change Request Revised (← links)
- 05000336/LER-1986-005-02, :on 860812,while Attempting to Reduce Power from 100% to 30%,plant Tripped at 98% Power.Caused by Added Load of Backup Heaters.Ongoing Mod Underway to Install More Accurate Breaker Trip Mechanisms (← links)
- 05000336/LER-1985-013, :on 850820,charging Pump C Removed from Svc to Repair Packing Leaks & on 850822,dye Penetrant Insp of Block Revealed Crack.Caused by High Internal Stresses.Block Replaced W/Spare from Warehouse (← links)
- 05000336/LER-1986-009, :on 860929 & 1010,ESF Actuations Resulting in Containment Purge Isolations Occurred.Caused by Personnel Error & Failure of Detector Due to Water Intrusion.Breaker Reset.Detector Repaired & Returned to Svc (← links)
- 05000336/LER-1987-015, :on 861114,util Informed That GE Model 12 Cfd Relays Installed Above 30-ft Elevation Not Seismically Qualified for Class 1E Svc.Caused by Design Error.Relay Replaced (← links)
- 05000336/LER-1987-002, :on 870102,reactor Tripped on Low Steam Generator Level.Caused by Failure of Steam Generator 2 Feedwater Regulating Valve.Valve Repaired (← links)
- 05000336/LER-1987-001, :on 861222,intermittent Fire Alarms Received from Heat Detectors Above Reactor Coolant Pump 5.Caused by Heat Detector Failure.Faulty Detector Will Be Replaced.W/ (← links)
- 05000336/LER-1986-021-01, :on 861231,broken Springs Found in Two of Eight Valcor Solenoid Operated Valves.Caused by Hydrogen Embrittlement as Discussed in Valcor Part 21 Notification & IE Info Notice 86-072.Springs Replaced (← links)
- 05000336/LER-1987-004-01, :on 870202 & 08,automatic Actuation by Emergency Safeguards Actuation Sys Resulted in Containment Purge Valve Isolation.Caused by Broken Mylar Window on Beta Scintillation Detector (← links)
- 05000336/LER-1986-012, :on 861009,containment Penetration 14 Leakage Test Reported Leakage Rate Exceeded Limits.Caused by Debris Lodged Under Valve Seat Preventing Full Closure of Valve. Debris Removed (← links)
- 05000336/LER-1986-008, :on 860920,6 of 16 Valves Failed Main Steam Safety Valves Simmer Test Used to Verify Pressure Setpoint. Cause of Setpoint Drift Unknown.Increased Accuracy Pressure Gauges Used to Reduce Test Error (← links)
- 05000336/LER-1986-023-01, :on 861213,charging Pump C Found to Be Leaking Water from Pump Head Area.Caused by Cracked Pump Block. Block Replaced (← links)
- 05000336/LER-1986-004, :on 860601,reactor Trip Occurred Due to Reactor Coolant Pump Underspeed.Caused by Loss of Power to Bus 25B. Caution Statements Added to Operating Procedures OP 2342 & OP 2343 & Agastat Relays Adjusted (← links)
- 05000336/LER-1986-020-01, :on 861129 & 1223,sensed Undervoltage Condition Caused Loss of 4,160-volt Power to Vital Bus 24C.Caused by Improperly Installed Bus Voltage Potential Sensing Drawer. Drawer & Cover Realigned (← links)
- 05000336/LER-1986-018-01, :on 861210,14 Hydraulic & 7 Mechanical Shock & Sway Suppressors Removed from Supports.Caused by Need to Reduce Snubbers.Snubbers Replaced W/Rigid Sway Struts.W/ (← links)
- 05000336/LER-1998-005-02, Forwards LER 98-005-02,re HELB Deficiencies for Piping Inside Containment Identified on 980318.Commitments Made by Util Also Encl (← links)
- 05000336/LER-1988-011-01, :on 881025,loss of Normal Power Due to Improper Connection of Grounding Device to Bus Side of 4,160 Volt Breaker.Caused by Personnel Error.Verification That All Equipment Responding as Required Done (← links)
- 05000336/LER-1987-005, :on 870306,charging Pump B Found Leaking Water from Pump Head Area.Caused by Cracked Block.Pump Block Replaced W/Spare (← links)
- 05000336/LER-1999-007, :on 990319,failure to Monitor SG Primary & Secondary Coolant Temperatures IAW TS Surveillance Requirement 4.7.2.1,was Discovered.Caused by Procedural Inadequacies.Personnel Provided with Briefings (← links)
- 05000336/LER-1986-002-01, :on 860417,C-E Investigation Determined That Acceptance Criteria Nonconservative for Meeting RCS Flow Limiting Condition for Operation.Caused by Procedural Inadequacy.Procedural Change Made (← links)
- 05000336/LER-1988-010, :on 880921,w/plant Operating in Mode 1 at 100% Power,Two Unit Process Radiation Monitors Inoperable.Caused by Personnel Error.Procedures for Radiation Monitors Functions Testing Reviewed (← links)
- 05000336/LER-1999-006, :on 990301,failure to Satisfy RCP Underspeed Sensing Circuit Response Time TS SR 4.3.1.1.3 Was Noted. Caused by Historical Use of Unconservative Testing Methodology.Trm Change Has Been Implemented (← links)
- 05000336/LER-1999-004, :on 990211,requirements of TS 3.7.6.1 Were Violated When Water Was Transferred to RCS from Rwst.Caused by Failure to Verify Boron Concentration of Makeup Source Prior to RCS Addition.Briefing to Be Provided to Personnel (← links)
- 05000336/LER-1997-035-02, :on 971111,shutdown Cooling Sys Isolation Valve Did Not Comply W/App R Requirements (GL 86-10).Caused by Inattention to Detail & Inadequate Interdiscipline Review. Power Cable Rerouted So It Is Not Subject to Hot Shorts (← links)
- 05000336/LER-1996-004, :on 960131,svc Water Strainer Backwash Sys Susceptibility to Freezing Following Loss of Intake Structure non-vital Heating Occurred.Caused by Inadequate Original Design.Design Change Implemented (← links)
- 05000336/LER-1997-009-01, :on 970325,insufficient ESFAS Surveillance Testing,Per GL 96-01,noted.Caused by Inadequate Program to Ensure Sps Fully Implement TS Requirements.Operational Surveillances Will Be Revised (← links)
- 05000336/LER-1998-026-01, :on 981223,discovered That Pressurizer Spray Line Fatigue Limits Were Exceeded.Caused by Insufficient Thermal Effects Analysis.Design Mods Will Be Implemented to Ensure Compliance with ASME Code Requirements (← links)
- 05000336/LER-1998-001, :on 980108,ongoing Engineering Evaluations of Fault Clearing & Fuse Coordination for Vital 120 Volt AC Sys Occurred.Caused by Incomplete Engineering Evaluation of Fault Clearing.Changes Will Be Implemented (← links)
- 05000336/LER-1997-034-02, :on 971029,containment Sump Isolation Valves Could Not Be Susceptible to Thermally Induced Pressure Locking.Caused by Failure to Identify Full Range of Conditions.Evaluation Will Be Revised (← links)
- 05000336/LER-1998-002-01, Forwards LER 98-002-01,re ECC Sys Single Failure Vulnerability on 980109.LER Suppl Provides Info on Addl Discrepancies,Identified During Investigation of Condition & During Implementation of Associated Corrective Actions (← links)
- 05000336/LER-1997-024-01, Forwards LER 97-024-01,documenting Condition Discovered at Mnps,Unit 2 on 970619.Suppl Provides Update on Analyses & Investigation of Condition.Commitments Made by Util,Encl (← links)
- 05000336/LER-1998-025-01, :on 981111,noted That Several Check Valves Had Not Been Tested IAW ASME Section XI Criterion.Caused by Inadequate Design Basis Flow Requirement Specifications for IST Check Valves.Applicable IST Sps Will Be Revised (← links)
- 05000336/LER-1986-003-01, :on 860516,evaluation of Fire Dampers in Response to IE Info Notice 83-69 Defined 20 Fire Dampers Improperly Installed or Rated for Fire Zones.Fire Patrols Established.Fire Dampers Will Be Changed (← links)
- 05000336/LER-1995-032-01, Forwards Suppl to LER 95-032-01,documenting Event That Occurred at Unit 2 on 950808.LER Suppls Repts Completions of Short & long-term Corrective Actions Associated W/Pipe Rupture in Secondary Sys within Turbine Bldg (← links)
- 05000336/LER-1996-024-02, Forwards LER 96-024-02,documenting Event Which Occurred on 960507 Re Inadequate ESAS & RPS Response Time Surveillance Testing.Commitments Made within Ltr Are Included in Attachment 1 (← links)
- 05000336/LER-1997-029-01, Forwards LER 97-029-01,documenting Condition That Was Discovered at Mnps,Unit 2,on 970826.LER Suppl Provides Update on Analysis of Condition,Including Identification of Addl Deficiency Discovered During Investigation (← links)
- 05000336/LER-1996-017, :on 960320,discovered That Hydrogen Monitoring Sys Does Not Meet Single Failure Criterion by Reg Guide 1.97.Caused by Failure to Adequately Consider Sys Design Basis Requirements.Design Change Modified (← links)
- 05000336/LER-1997-037-02, :on 971126,reduced Flow to Heat Exchangers Due to Svc Water Piping Liner Matl Lodged in Strainer for Edg. Will Perform Svc Water Piping Internal Inspections to Locate Source of Piping Liner Matl & Will Perform Repairs on Lin (← links)
- 05000336/LER-1990-014-02, :on 901010,main Steam Safety Valve Setpoint Drift Discovered During as-found Simmer Test (← links)
- 05000336/LER-1990-017-01, :on 901010,discovered That Svc Water Pipe Support Inadequate (← links)
- 05000336/LER-1990-016-02, :on 901009,inadvertent ESAS Actuation Occurred in Violation of Tech Specs (← links)
- 05000336/LER-1997-036-02, :on 971117,TS Containment Sump TSP Vol Was Noted to Be Insufficient.Caused by Incorrect Assumption Re Amount of TSP Required to Neutralize Known Bac.Ts Change Requested to Increase Min Required TSP Vol (← links)
- 05000336/LER-1999-005, :on 990223,insufficient Verification of TS Surveillance 4.8.2.3.2,re 125 Volt Class 1E Battery Bank Load Test Was Noted.Caused by Inadequate Control Over Addition of New Battery Loads.Implemented Design Controls (← links)
- 05000336/LER-1998-024-01, :on 981030,potential Leakage Path Through Containment Pressure Instrument Was Identified.Caused by Failure to Adequately Consider FSAR Design Commitments. Replaced Nonconforming Containment Pressure Instruments (← links)
- 05000336/LER-1999-009, :on 990525,manual RT Due to Steam Leak in Turbine Bldg Was Noted.Caused by Inadequate Controls.Refined Controls for Adjusting FW Heater String Controls (← links)
- 05000336/LER-1988-005-01, :on 880204,loss of Normal Power Occurred on Facility 1 Vital 4160 Volt Electrical Bus.Caused by Operator Error.Facility 1 Reactor Bldg Closed Cooling Water,Svc Water & Low Pressure Safety Injection Pumps Started (← links)
- 05000336/LER-1997-023-01, Forwards LER 97-023-01 Documenting non-conservative HPSI Flow Assumptions That Were Identified at Mnps,Unit 2,on 970612.LER Supplement Provides Results of re-evaluation of Affected Accident Analysis,Concluding That Criteria (← links)
- 05000336/LER-1988-001, :on 880108,three Steam Generator Tube Ends Found Unplugged During Cold Shutdown.Caused by Equipment Operator Error.Tube Ends Plugged (← links)
- 05000336/LER-1999-008, :on 990511,AFW Regulating Valve Failed Monthly Inservice Operability Test,Which Strokes Valve Through Full Range of Motion.Caused by Mechanical Failure of AFW Regulating Valve non-safety Positioner.Procedures Revised (← links)
- 05000336/LER-1998-023-01, :on 980924,failed to Adequately Test CAR Fans IAW TS SR 4.6.2.1.2(a).Caused by Misinterpretation of SR 4.6.2.1.2(a).Surveillance Procedures Were Revised to Ensure Periodic Testing of CAR Fans Satisfies SR 4.6.2.1.2(a) (← links)
- 05000336/LER-1997-037-01, Forwards LER 97-037-01,documenting Event That Occurred at Mnps,Unit 2 on 971126.Suppl Provides Conclusions from Insps & Repairs Conducted in Response to Event (← links)
- 05000336/LER-1986-001-01, :on 860429,seismic Hanger 60027 Found W/Broken Anchor Bolt.Caused by Corrosion from Salt Water Over Period of Yrs.Inoperable Portion of Svc Water Sys Isolated (← links)
- 05000336/LER-1998-004-01, Forwards LER 98-004-01,re Event Determined Reportable on 980316 at Millstone Unit 2.Commitments Made by Util,Encl (← links)
- 05000336/LER-1998-020-01, :on 980929,noted SI Recirculation Header Piping Components Did Not Fully Satisfy ISI Requirements.Caused by Lack of ISI Test Program Ownership.Revised Applicable SI Leakage Test Procedure (← links)
- 05000336/LER-1998-021-01, :on 980825,noted Inadequate Radiation Monitoring of Containment Atmosphere During Refueling Operations.Caused by Failure to Reflect Design Basis Assumptions Into Operating Practices.Will Revise Procedure (← links)
- 05000336/LER-1988-008-01, :on 880408,control Element Assembly (CEA) Dropped Into Core & Declared Inoperable.Caused by Overheating of Upper Gripper Coil.Control Element Drive Sys Coils for CEA Replaced (← links)
- 05000336/LER-1998-019-01, :on 980826,potential Inability to Close AFW Regulator Valves After HELB Discovered.Caused by Inadequate Review by Original Facility Analysis for Postulated Helbs.Afw Sys Will Be Upgraded (← links)
- 05000336/LER-1998-018-01, :on 980818,spatial Separation of Redundant Cable Trays Did Not Meet Min Design Requirements.Caused by Initial Inadequate Installation.Data Is Being Evaluated from Walkdowns of Other Vital Equipment Cable Tray Areas (← links)
- 05000336/LER-1996-003-01, :on 960205,failed to Recognize Requirement to Enter TS LCO 3.0.3 Following Discovery of Ice Blockage. Caused by Inadequate Problem Identification Methods.Design Basis Summary Documents Have Been Prepared Re TS Safety Sys (← links)
- 05000336/LER-1995-032-02, Forwards LER 95-032-02,documenting Condition That Was Discovered at Unit 2 on 950808.LER Suppl Provides Update on Corrective Action for Condition.Util Commitments Made within Ltr Included in Attachment 1 (← links)
- 05000336/LER-1997-028-01, Forwards LER 97-028-01,documenting Conditions That Were Discovered at Unit 2 on 970822.LER Suppl Provides Update on Analyses & Investigation Currently Underway for Condition, Including Identification of New Deficiencies (← links)
- 05000336/LER-1996-018, :on 960316,gaps Discovered in Encls Door Seals for Motor Control Ctrs B51 & B61.Caused by Weakness in Existing Program to Inspect & Verify Integrity of Environ Protective Barriers.Doors for MCC B51 & MCC B61 Replaced (← links)
- 05000336/LER-1996-018-01, Forwards LER 96-018-01,documenting Condition That Was Discovered at Unit 2 on 960319.LER Suppl Provides Update on Analyses & Investigation of Condition.Attachment 1 Is Clarification of Original Commitment Associated W/Ler (← links)
- 05000336/LER-1997-025-02, :on 910828,discovered Potential of Single Failure of AFW Sys Via Condenser Hotwell make-up Valve. Caused by Failure to Consider Single Failure Scenarios.Night Order Issued to Maintain Condensate Storage Tank at 76% (← links)
- 05000336/LER-1988-009-01, :on 880607,CEA Dropped Into Core.Caused by Upper Gripper Coil Failure from Overheating Condition Resulting in Degraded Coil Insulation.Total of 60 Coils Either Replaced or New Coil Stack Installed (← links)
- 05000336/LER-1988-004-01, :0n 880126,inadvertent ESF Actuation Occurred. Caused by Personnel Error.Testing Suspended & Equipment Disconnected & Retest Procedure Revised to Provide Step by Step Details on Checking Isolation Transformer (← links)
- 05000336/LER-1997-024-02, :on 970619,violation of TS 4.0.5,ASME Section XI Surveillance Requirements Was Determined.Caused by Misinterpretation & Wrong Assumption.Appropriate Procedure Will Be Revised (← links)
- 05000336/LER-1994-016, :on 940708,SG Blowdown Isolation Valves 2-MS-220A & 2-MS-220B Automatically Closed Due to Spurious High Radiation Signals in SG Blowdon RM,RM-4262.There Were No Similar LER (← links)
- 05000336/LER-1994-016-01, Forwards LER 94-016-01.Original Rept Had Been Erroneously Submitted Ref Millstone Unit 1 License & Docket Number. Rev 1 to LER Reflects Correct Numbers (← links)
- 05000336/LER-1986-010, :on 861006,inconsistency Noted Between Safety Analysis & Tech Specs.Caused by Inconsistency Between Safety Analysis & Tech Specs.Administrative Controls Installed (← links)
- 05000336/LER-1997-019-02, :on 970422,automatic Test Initiator Sends Repeated Trip Signals to RSST Feeder Breaker Timing Circuit. Caused by Unexpected Interaction Between Unrelated Signals. Noise Interaction Will Be Isolated & Corrected (← links)
- 05000336/LER-1997-017-02, :on 970417,discovered Bypassed Refueling Machine Overload cut-off.Caused by Failure to Incorporate Refueling Machine Design Consideration.Evaluation Will Be Performed to Determine If Mod Needed or TS Change Needed (← links)
- 05000336/LER-1988-007, :on 880216,plant Entered Mode 3 W/Only One of Two Diesel Generators Operable,Violating Tech Spec Section 3.04.Caused by Personnel Error.Addl Attention Directed to Tech Spec Actions Statements & Mode Changes (← links)
- 05000336/LER-1988-006-01, :on 880218,combined Bypass Leakage Rate Exceeded Tech Spec 3.6.1.2.C Limit.Caused by Debris Lodged in Caged Area of Valve Preventing Plug from Entering Seat. Debris Removed & Seating Surface Cleaned (← links)
- 05000336/LER-1997-010-02, :on 970112,heavy Dummy Fuel Assembly & Handling Tool Weight Exceeded TS Limit Occurred.Caused by Weight of Handling Tool Never Considered to Be Part of Load.Temporary Measure & Appropriate Procedures Revised (← links)
- 05000336/LER-1987-013-02, :on 871219,fire Watch Patrol Failed to Conduct Hourly Insp Per Tech Specs.Caused by Watchstander Failure to Releive Position in Timely Manner.Fire Watch Contractor Replaced (← links)
- 05000336/LER-1987-014, :on 871231,12 of 16 Valves Tested Failed Initial Main Steam Safety Valve Simmer Test.Caused by Setpoint Drift.Setpoints Adjusted.Six Valves Sent to Outside Contractor for Refurbishment (← links)
- 05000336/LER-1988-002-01, :on 880119,loss of Normal Power Occurred on Vital 4160-volt Power Electrical Bus 24D.Caused by Failure of Dc Input Capacitor in Supply Inverter INV-1.Normal Power Restored to Bus & Capacitor Replaced (← links)
- 05000336/LER-1997-021-02, :on 970423,investigation Indicated That Burned Out Lamp Failed W/Internal Short Circuit.Caused by Inadequate Scope of Review in Response to NRC Info Notice 94-68.Engineering Evaluation Shall Be Performed (← links)
- 05000336/LER-1997-018-02, :on 970421,instrumentation Loop Components Did Not Meet Regulatory Guide 1.97 Category 1 Recommendations. Caused by Ineffective Implementation of Program Controls. Complete RG 1.97 Rev 2 Compliance Review (← links)
- 05000336/LER-1997-016-02, :on 970415,TS 4.0.4 Was Incorrectly Applied to SRs for Tdafwp.Caused by Failure to Incorporate TS SRs Into Plant Surveillance Procedures.Surveillance Procedure for Tdafwp Revised Prior to Entry Into Mode 4 (← links)
- 05000336/LER-1997-015-02, :on 970415,deficiency of Containment Air Recirculation Coolers During Design Basis Accidents, Occurred.Caused by Inadequate Consideration of Potential Failure Modes.Finalize Calculations (← links)
- 05000336/LER-1994-001-02, :on 940118,auxiliary Feed Regulating Valves to Meet Inservice Test Stroke Time,Failed.Caused by Presence of Hydraulic Forces Across Valve Plug.Ist Acceptance Criteria Was Revised (← links)
- 05000336/LER-1997-014-02, :on 970415,insufficient RBCCW Flow to HPSI Seal Coolers Was Identified.Cause of Condition Has Not Been Determined.Required Design Flow & Effect Deficient Flow Has on HPSI Pump Seal Coolers Performances Will Be Evaluated (← links)
- 05000336/LER-1997-012-02, :on 970410,inadequate DG Start Surveillance Test Was Identified.Caused Because Personnel Was Unaware That Design of Circuitry for DG Ready to Load Annunciator Did Not Adequately Represent Engine Speed.Revised Sps (← links)
- 05000336/LER-1993-023-02, Forwards LER 93-023-02,documenting Event Occurred at Unit 2 on 930622.Commitments Made within Ltr Listed (← links)
- 05000336/LER-1997-013-02, :on 970411,annunciator for Operating Stack Gaseous RM Was Inoperable Due to Inattention to Detail in Procedure Validation & Verification.Containment RM Calibration Procedure Corrections Was Approved (← links)
- 05000336/LER-1997-009-02, :on 970325,insufficient ESFAS Surveillance Testing,Per GL 96-01 Review Occurred.Caused by Inadequate Program to Ensure Surveillance Procedures Fully Implement TS Requirements.Procedures Will Be Revised (← links)
- 05000336/LER-1996-029, :on 960715,discovered That Evaluation for Removal of Startup Rate Trip Feature Was Potentially non-conservative.Caused by Failure to Adequately Identify Design Basis Requirements.Modified Procedures (← links)
- 05000336/LER-1996-029-01, Forwards LER 96-029-01,providing Update on Analyses & Investigation for Event.Commitments Made within Ltr,Listed (← links)
- 05000336/LER-1995-020-01, :on 950516,automatic Actuation of Engineered Safety Feature Occurred During Maint.Caused by Procedure Deficiency.Revised Operations Procedure OP-2384 to Add Appropriate Caution for de-energization of Cabinets (← links)
- 05000336/LER-1985-015, :on 851008,no Sample Flow from Radmonitor Discovered.Caused by Low Flow Switch FIS8262 Stuck in Nonalarming Position,Closed Suction Valve 2-EB-89 & Failure of Operator to Verify Proper Radmonitor Flow (← links)
- 05000336/LER-1985-014, :on 850927,orderly Shutdown Commenced as Precautionary Measure Due to Hurricane Gloria.Grounding Problems Caused Unit to Divorce from Offsite Power.Unit Returned to Normal Hot Shutdown Condition (← links)
- 05000336/LER-1997-011-02, :on 970402,improperly Adjusted Dual Function Valves Occurred.Caused by Insufficient Program to Ensure, Facility Procedures Clearly Addressed All Related Design Basis Functions.Affected Valves Will Be Adjusted (← links)
- 05000336/LER-1985-009-01, :on 851106,during Routine Testing on Unit Simulator,Design Discrepancy Noted in Charging Pump B Circuitry.Caused by Design Error Which Inhibits Pump Operation.Mod to Circuit Implemented (← links)
- 05000336/LER-1985-006, :on 850329,ESFAS Channel II Actuated.Caused by Technician Installing New Response Time Tested Relays. Procedures Revised to Prevent Inadvertent ESFAS Actuations (← links)
- 05000336/LER-1997-003-01, Corrected Page One to LER 97-003-01:on 961216,discovered Discrepancy in Plant Procedure Utilized to Perform Periodic Insp of Fire Protection Sys Smoke Detectors.Caused by Failure to Properly Incorporate Ts.Ts Partially Revis (← links)
- 05000336/LER-1997-008-02, :on 970310,repts Review Facility Compliance W/ GL 96-01 for Reactor Protective Sys Received.Caused by Inadequate Program to Ensure Surveillance Procedures Fully Implement TS Requirements.Procedures Revised (← links)
- 05000336/LER-1997-007-02, :on 970308,inadequate Surveillance Procedure Used for Verifying Operability of RCS Vents.Caused by Failure to Incorporate TS SRs Into Plant Surveillance Procedures.Revised Surveillance Procedure (← links)
- 05000336/LER-1996-031-01, :on 961003,discovered Potentially non-conservative Assumptions Used in Analysis Cold Result in Exceeding ASME Code Max Relief Valve Accumulation for Sg. Caused by Inadequate Design of Mssv.Plant Mods Initiated (← links)
- 05000336/LER-1996-032, :on 961008,potential Failure of RCS Vent Sys to Perform Design Function Discovered.Caused by Inadequate Design of Reactor Head Vent Portion of RCS Vent Sys. Implemented Mods (← links)
- 05000336/LER-1984-011-01, :on 841115,MSIV Closed & Reactor Tripped.Caused by Seal Degradation in Cylinder of Check Valve.Cylinder Replaced.Seals Replaced Every Refuel Outage.New Insulation Installed on Valve (← links)
- 05000336/LER-1985-012, :on 850726,loss of Svc Water Header a Occurred. Caused by Fouled Strainer Due to Debris.Header Returned to Svc Following Cleaning & Replacement of Strainer Internals (← links)
- 05000336/LER-1985-011-01, :on 850715,plant Tripped Due to Thermal Margin Low Pressure.Caused by Pressurizer Spray Valve Stuck Open & Unable to Stroke.Valves Added to Preventative Maint Program (← links)
- 05000336/LER-1997-006-02, :on 970211,main Steam Line Break Inside Containment Event Could Result in Exceeding Design Pressure of Primary Containment During Certain Scenarios.Caused by Inadequate Evaluation.Ca Will Be Implemented (← links)
- 05000336/LER-1997-005-02, :on 970204,inservice Test Instrumentation Did Not Meet Ansi/Asme Chapter XI Requirements.Caused by Inadequate Administrative Structure for IST Program. Procedure to Administer IST Program Was Implemented (← links)
- 05000336/LER-1985-013-01, :on 850822,charging Pump C Removed from Svc Due to Packing Leaks.Caused by High Internal Stresses Causing Cracks to Initiate at Subsurface Inclusions.Pump Replaced (← links)
- 05000336/LER-1985-004, :on 850314,sufficient Tubes in Each Steam Generator Had Flaws Greater than 40% through-wall to Place Steam Generators in Category C.3 of Tech Spec Table 4.4-6. Sludge Lancing & Chemical Cleaning Initiated (← links)
- 05000336/LER-1997-004-01, :on 970123,violation of TS 3.1.2.3 Requirement for Number of High Pressure Safety Injection Pumps Capable of Injecting Into RCS Occurred.Caused by Personnel Error. HPSI Pumps Have Been Revised (← links)
- 05000336/LER-1997-002-01, :on 970108,damper 2-HV-210 Could Not Be Manually Operated within Ten Minutes as Required in Accident Analysis.Caused by Inadequate Evaluation of Mechanical Binding.Damper Was Placed in Fail Open Position (← links)
- 05000336/LER-1996-031-02, :on 961003,potentially non-conservative Assumptions Were Identified in Analysis for Single MSIV Closure.Caused by Analysis of Secondary Side Peak Pressures. Review & Analysis of Event Is Continuing (← links)
- 05000336/LER-1996-031, Forwards LER 96-031-00 Which Documents Event That Occurred at Mnps,Unit 2 on 961003.Commitments,listed (← links)
- 05000336/LER-1996-032-02, :on 961008,potential Failure of Reactor Coolant Sys Vent Sys to Perform Design Function Identified.Cause Has Not Been Determined.Conditions of Event Under Investigation (← links)
- 05000336/LER-1995-019-02, Forwards LER 95-019-02,documenting Event That Occurred at Millstone Nuclear Power Station Unit 2 on 950514.Util Commitments Made within Ltr,Listed (← links)
- 05000336/LER-1984-006, :on 840213,during Response Time Testing of Primary Coolant Loop RTDs,12 RTDs Exceeded 8 Time Limit. Caused by Time Constant of RTD Element Installation & Mismatch.New Elements Installed (← links)
- 05000336/LER-1996-043-02, :on 961231,flow Indicators to East & West DC Switchgear Rcs Were Approx 29% Lower than Indicator Flow. Caused by Inadequate Flow Instrument Design Documentation. Elements Orifice Dimensions Verified (← links)
- 05000336/LER-1996-024-01, Forwards LER 96-024-01 Documenting Event That Occurred at Millstone Nuclear Power Station,Unit 2 on 960507 Util Commitments Made within Ltr,Listed (← links)
- 05000336/LER-1996-042-02, :on 961218,engineering Review Revealed That Safety Grade (1E) Electrical Isolation Requirements Were Not Satisfied.Caused by Inadequate Design Control.Mod Was Implemented to Disconnect non-QA Components from Channels (← links)
- 05000336/LER-1996-041-02, :on 961217,invalid Local Lrt of Fuel Transfer Tube Flange Discovered Due to Blockage of Test Port W/ Silicon Rubber Sealant Compound & Lack of Procedural Guidance.Developed Procedure (← links)
- 05000336/LER-1996-023, :on 960425,discrepancies Found in Various TS Required Valve Lineups.Caused by Failure to Incorporate TS SRs Into Plant Surveillance Procedures.Isolation Valves Had Been Inspected & Verified to Be in Closed Position (← links)
- 05000336/LER-1996-023-01, Forwards Suppl LER 96-023-01,providing Update on Analysis & Investigation of Event That Occurred at Milestone Station on 960425 (← links)
- 05000336/LER-1996-040-02, :on 961212,inadequate Surveillance Procedure for Verifying Motor Circuit Breaker Position Identified. Caused by Failure to Properly Incorporate TS Requirements. Surveillance Procedures Revised (← links)
- 05000336/LER-1984-012, :on 841112,reactor Tripped to Protect Turbine from Water Due to Steady Rise in Level in Feedwater Heater 5A.Caused by Leak in Heater.Check Valves 2FW-5A & 2-FW-5B Inspected & Reworked During Refueling Outage (← links)
- 05000336/LER-1996-039-02, :on 961106,licensee Failed to Perform Periodic Surveillance Testing for Containment Purge Sys Containment Isolation Valves IAW TS 4.9.10.Caused by Inadequate Program design.SP-2605H Has Been Revised to Test Isolation Functio (← links)
- 05000336/LER-1996-037, :on 961202,inadequate Surveillance Procedure for Verifying Average Water Temp at Unit 2 Intake Structure Discovered.Caused by Misinterpretation of TS Requirements.Ts Rev Initiated (← links)
- 05000336/LER-1996-038-02, :on 961202,inadequate Surveillance Procedure Used to Verify EDG Operability.Caused by Failure to Properly Incorporate TS SRs During Recent Revs of Monthly EDG Tests. Changed EDG Surveillance Procedures (← links)
- 05000336/LER-1996-036-02, :on 961108,inadequate Seismic Qualification of 4160 Volt Switchgear Occurred Due to Circuit Breakers in Racked Down Position.Caused by Lack of Understanding within Industry Re Seismic Qualification (← links)
- 05000336/LER-1985-013-02, :on 850822,during Maint Evolution After Charging Pump C Removed from Svc Due to Packing Leaks,Dye Penetrant Insp Showed Cracked Block.Caused by High Internal Stresses.Pump Block Replaced W/Spare (← links)
- 05000336/LER-1985-010, :on 850615,loss of Low Temp Overpressure Protection Due to Isolation & Venting of Pressurizer Pressure Transmitters.Caused by Procedure Inadequacy.Porvs Manually Opened & Procedure Revised (← links)
- 05000336/LER-1996-035-02, :on 961009,failed to Perform Periodic Surveillance Testing for Interlock Function of Ms Isolation Sys Function of Esas.Caused by Inadequate Training. Surveillance Procedure Revised & I&C Personnel re-trained (← links)
- 05000336/LER-1996-034-02, :on 961004,declared Meterological Monitoring Instrumentation Inoperable Due to Inadequate Preparation of Ts.Completed Loop Accuracy Calculation & Will Request Rev to TS to Remove Instrument Accuracy Requirement (← links)
- 05000336/LER-1985-009, :on 850611,during Routine Testing at Simulator, Discrepancy Noted in Charging Pump Circuitry.Caused by Design Error.Circuit Design Modified (← links)
- 05000336/LER-1984-008-01, :on 840615,semiannual Fire Detection Sys Instrumentation Surveillance Missing & Breach in Fire Barrier in Switchgear Room Identified.Cause Unknown.Fire Detection Surveillance Added to Master Lists (← links)
- 05000336/LER-1993-002, :on 930107,determined That LCO, Accident Monitoring Not Entered Upon Entry Into Mode 3.Caused by Incomplete Application of Change to Ts.Event Will Be Reviewed by All Licensed Operators (← links)
- 05000336/LER-1992-011, :on 920609,leakage Rate of Containment Hydrogen Purge Piping Isolation Valves May Have Exceeded Combined TS Leakage Limit.Caused by Personnel Error.Valves Disassembled & Inspected & Damaged Keys Replaced (← links)
- 05000336/LER-1991-012, :on 911106,reactor Manually Tripped Due to Plant Conditions Resulting from Rupture in Reheater Drain Tank to High Pressure Feedwater Heater Pipe.Rupture Pipe Replaced & Pipe Insp Program Expanded (← links)
- 05000336/LER-1993-001, :on 921227,weekly TS Surveillance in Modes 5 & 6 Not Performed within Specified Time Interval.Caused by Lack of Procedural Detail & Administrative Error.Flowpath Instruction Revised & Personnel Counseled (← links)
- 05000336/LER-1992-020-02, :on 921124,discovered That During 1992 Snubber Exams,Three Snubbers Not Included in List of safety-related Snubbers.Caused by Failure to Maintain Snubber Insp Lists Up to Date.Three Snubbers Added to List (← links)
- 05000336/LER-1985-007, :on 850413,engineered Safeguards Actuation Sys Actuated Closing Containment Purge Valves.Caused by Loose Plated Particulate Radiation in Radiation Monitor Causing High Level Alarm.Procedures Revised (← links)
- 05000336/LER-1983-014-03, /03L-0:on 830326,facility I of Encl Bldg Filtration Sys Declared Inoperable When Inlet Damper 2-EB-50 to Plenum Failed to Open During Training Evolution.Caused by Failure in Honeywell Motor Operator to 2-EB-50 (← links)
- 05000336/LER-1985-008, :on 850524,during Design Review to Determine Impact of Locked Up Snubber on Pressurizer Vent Piping,Error Discovered in Seismic Load Calculation.Caused by Incorrect Data Input to Adlpipe Version 1B (← links)
- 05000336/LER-1992-006, :on 920302,design Deficiency Discovered for Letdown Isolation Valves 2-CH-089 & 2-CH-516.Caused by Design Error in Initial Layout of Plant.Llrt Program Updated & TS Change Request Submitted (← links)
- 05000336/LER-1985-003, :on 850305,during 1985 Refueling Outage, Containment Penetrations Type B & C Leakage Rate Test Found Leakage in Excess of Tech Spec Limit.Caused by Excessive Leakage of Listed Penetrations/Valves (← links)
- 05000336/LER-1990-015, :on 900919,unit Experienced Inadvertent Isolation of Containment Purge Valves.On 900920,unit Experienced Actuation of SI Actuation Sys.Caused by Operator Error.Technician Counseled (← links)
- 05000336/LER-1991-010, :on 911018,reanalysis of Main Steam Line Break Confirmed That Main Steam Line Break Exceeded Containment Design Limits.Caused by Incorrect Assumption in FSAR Analysis.Jco Developed & Mods Installed (← links)
- 05000336/LER-1991-009-01, :on 910821,DG Exhibited Erratic Load Control, Resulting in Erratic Load Swings on DG 12 U.Caused by Intermittent Failure of Woodward Governor EG-A Control Unit. Unit Replaced & Full Test Program Conducted (← links)
- 05000336/LER-1992-004, :on 920211,HPSI Train Header Isolation Valve 2-SI-656 Was Discovered to Be Closed.Caused by Procedure Deficiency.Valve 2-SI-656 Opened & HPSI Sys Flow Path Restored (← links)
- 05000336/LER-1979-040-03, /03L-0:on 791204,while Filling & Draining Condenser Hotwells,Condensate Storage Tank Level Was Below Tech Spec Limits.Cause Unstated.Hotwells Filled & Drained. Firewater Sys Operability Verified as Backup Supply (← links)
- 05000336/LER-1996-027-01, :on 960426,turbine Bldg Crane Not Included in NUREG-0612 Evaluation for Heavy Loads.Turbine Bldg Crane Procedures Revised (← links)
- 05000336/LER-1996-021-01, :on 960227,snubber Failure in Pressurizer Spray Line Occurred.Caused by Corrosion.Replaced Snubber Serial 12883 W/Identical Model PSA-1 Snubber (← links)
- 05000336/LER-1994-027-01, :on 940903,channel B Linear Range Ni Drawer Opened & Technicians Found Connector J6 Disconnected from Jack.Caused by Personnel Error.Reconnected HV Connector J6 & Ensured Proper Operation of Channel B (← links)
- 05000336/LER-1985-005, :on 850401,retest of Control Switch Caused Loss of Normal Power Signal to Be Generated to 4.16 Kv Emergency Bus 24D.Caused by Personnel Error.Personnel Instructed to Use Increased Caution in Researching Circuits (← links)
- 05000336/LER-1992-019, :on 901005,discovered Combined Leakage Rate Exceeded.Caused by Wear in Plug & Seat Area.Seat & Plug Replaced & Tested Satisfactorily (← links)
- 05000336/LER-1996-028, :on 960627,potential Loss of Svc Water Strainer Resulting from Electrical Short of Backwash Valve Solenoid During Flood Conditions Occurred.Caused by Inadequate Original Design.Design Change Implemented (← links)
- 05000336/LER-1996-020, :on 960401,determined Potential Loss of RBCCW Inventory Through Primary Water make-up Line.Caused by Original Design Deficiency.Implemented Permanent Design Change (← links)
- 05000336/LER-1995-019-01, Forwards LER 95-019-01.Util Commitments Listed,Including Reviews of Operation Procedures to Be Completed by 961115 (← links)
- 05000336/LER-1985-002, :on 850302,intermittent Annunciator Alarm Indicated Process Radiation Monitor Tripped on High Radiation or Failed.Caused by Personnel Error.Radiation Monitor Restored & Purge Valves Reopened (← links)
- 05000336/LER-1996-001, :on 960625,discovered Reactor Coolant Sys Heatup Rate Exceeded Tech Spec.Caused by Design & Procedural Weaknesses Re Plant Heatup Controls.Revised Plant Operating Procedures & Heatup/Cooldown Computer Program (← links)
- 05000336/LER-1996-026-01, :on 960503,certain Valves Not Included in Surveillance.Caused by Historical Interpretation of Tech Spec.Informed Operators That Entering N/A for Certain Valves on Valve Lineups Is Unacceptable (← links)
- 05000336/LER-1996-022-01, :on 960423,determined That Single Failure of Hydrogen Purge Valves Would de-energize Heaters for Both Trains of Enclosure Bldg Filtration Sys.Caused by Error in Original Design.Implemented Design Change (← links)
- 05000336/LER-1996-020-01, :on 960401,discovered Potential Loss of RBCCW Inventory Through Primary Water make-up Line.Caused by Original Design Deficiency.Reestablished RBCCW Operability by Closing Pmw Isolation Valve (← links)
- 05000336/LER-1996-019-01, :on 960326,electrical Equipment Qualification SOV Circuits in Containment Not Fully Qualified.Caused by Programmatic Failure.C/A:Sov Circuits Modified (← links)
- 05000336/LER-1996-012-01, :on 960228,SIS Drain Stop Valves Failed to Meet Functional Requirements of Ts.Caused by Personnel Error & Inadequate Retest Requirements.C/A:Valve 2-SI-618 Modified & Safety Related Solenoid Valves Inspected (← links)
- 05000336/LER-1985-001, :on 850123,safety Analysis Error Found.Caused by Inconsistency Between Tech Spec Requirement on Axial Shape Index & Safety Analysis Assumptions on Index Used as Input to Small Break LOCA Analysis (← links)
- 05000336/LER-1996-013-01, :on 960314,assessed Wide Range Logarithmic Neutron Flux Monitors Nuclear Instrumentation Channels A,B,C & D as Inoperable Due to Potential Susceptability to Common Mode Failure.Replaced Failed Power Supply (← links)
- 05000336/LER-1996-016-01, :on 960312,common Power Supply Cable to 4 Condenser Pit Level Switches Found Improperly Connected. Caused by Inadequate Work Control.Cable Properly Connected & Trip Circuits Tested (← links)
- 05000336/LER-1996-015-01, :on 960312,failed to Perform Action Requirement for TS LCO 3.3.1.1.Caused by Failure to Recognize Applicability of TS During Abnormal Equipment Configuration. Revised Procedures (← links)
- 05000336/LER-1996-014-01, :on 960311,weekly TS Surveillances Missed. Caused by Personnel Error W/Respect to Scheduling.C/A: Implemented Requirements of Surveillance Procedure Sp 2614A-3 (← links)
- 05000336/LER-1992-009-02, :on 920612,auxiliary Bldg Elevation Sprinkler Sys Isolated for Approx Eight H Due to Personnel Error.Hose Stations & Sprinkler Sys Restored to Operable State & Continuous Fire Watch Stationed (← links)
- 05000336/LER-1992-010-02, :on 920530,discovered That Main Steam Safety Valve Setpoint Drifted.Cause Unknown.Setpoint Adjustments Made & Passed Retest (← links)
- 05000336/LER-1984-012-01, :on 841128,steady Rise in Water Level in Feedwater Heater 5A Necessitated Reactor Trip to Protect Turbine from Water Intrusion.Caused by Feedwater Heater Leak.Leak Plugged (← links)
- 05000336/LER-1996-011-01, :on 960222,required Time to Enter Mode 5 Exceeded.Caused by Effective Action Not Being Initiated to Revise SDC & Cooldown Rate Monitoring Procedures.Operating & Surveillance Procedures Will Be Revised (← links)
- 05000336/LER-1996-010, :on 960222,identified That Containment Hydrogen Monitor Flow Could Not Be Established W/Containment at Atmospheric Pressure Due to Improper Setting of Sys Pressure Regulators.Sys Calib Procedure Will Be Revised (← links)
- 05000336/LER-1996-008, :on 960222,concluded That Condition of Wire Mesh Screen Encl Over Two Containment Recirculation Suction Pipes Outside Design Basis.Caused by Const/Installation Error.Screen Encl Being Replaced (← links)
- 05000336/LER-1996-007, :on 960220,discovered RCS C/D Rate Exceeded TS Limit.Caused by Use of Wrong Temp Sensor.Plant Operating Procedures,Heatup/C/D Monitoring Computer Program & Operator Training Involving These Events Revised (← links)
- 05000336/LER-1996-005-01, :on 960212,discovered PEO Improperly Utilized to Replace Automatic Backwash Function of Svc Water Strainer Backwash Sys.Caused by Failure to Enter TS Action Statement. Revise Procedures for IST SWS Pump Operability (← links)
- 05000336/LER-1996-009-01, :on 960216,post LOCA Contianment Pressure Prevented Timely Extraction of PASS Air Sample & H Sample. Caused by Inadequate Assessment of Revised Post LOCA Response Analysis.Implemented Design Change (← links)
- 05000336/LER-1996-006-01, :on 960207,service Water Pump Motor Flood Protection Not Provided.Caused by Inadequate Administrative Controls.Administrative Controls Established (← links)
- 05000336/LER-1990-005, :on 900503,notified of Potential High Energy Line Break Via as Sys in Safety Related Areas.Caused by Inaccurate Conclusions Drawn from 1973 Rept.As Sys Removed from Svc & Plant Mods Initiated (← links)
- 05000336/LER-1995-003-02, :on 960205,failed to Enter TS LCO 3.0.3 After Discovering Svc Water Strainers Inoperable.Caused by Failure to Recognize Ice Plug Formation in Strainer Backwash Line. Implement Comprehensive Operability Process (← links)
- 05000336/LER-1992-007, :on 920219,concluded That Reactor Coolant Gross Activity Surveillances Completed Prior to 920103 Failed to Meet Tss.Caused by Procedural Inadequacy.Surveillance Sp 2831 Was Changed (← links)
- 05000336/LER-1992-002-01, :on 920207,determined That Unit Was Not in Compliance W/Ts Surveillance 4.1.3.1.4a During Previous Startups.Caused by Inadequate Procedure (Sp 2620C).CEA Motion Inhibit Surveillance Sp 2620C Revised (← links)
- 05000336/LER-1995-044, :on 951129,discovered Surveillance Period for Containment Air Lock Testing Exceeded 25% Extension.Caused by Unclear TS Surveillance Requirements.Changed Manual to Clarify When to Use 4.0.2 Requirement (← links)
- 05000336/LER-1984-010-01, :on 841018,radiation Monitor 8157 Found Inoperable.Caused by Defective Photomultiplier Tube.Tube Replaced.Surveillances Rescheduled to Prevent Recurrences (← links)
- 05000336/LER-1992-013-02, :on 920713,pressurizer Safety Valve 2-RC-200 (S/N Bn 7128) Failed Lift Set Testing Due to Unknown Cause. Valve S/N Bn 7128 Being Refurbished,Retested & Set to 2485 Psig +/- 1% (← links)
- 05000336/LER-1992-011-02, :on 920710,leakage Rate Test of Containment Hydrogen Purge Piping Isolation Valves Exceeded SR 3.6.1.2b.Caused by Failure of Key Connecting Air Operator to Valve Shaft.Damaged Keys Replaced (← links)
- 05000336/LER-1992-012-01, :on 920706,inadvertent ESAS Actuation Occurred Resulting in Partial Loss of Normal Power & Undervoltage Actuation of Facility Z1.Caused by Deenergizing ESAS Sensor Cabinet.Power Restored to Vital 4,160-volt Bus (← links)
- 05000336/LER-1996-002, :on 960108,determined That Ice Plug in Common Line Resulted in Inability to Backwash Svc Water Strainers. Caused by Mod to Backwash Line Piping.Ice Plug Removed, Restoring Ability to Backwash (← links)
- 05000336/LER-1995-045, :on 951214,plant Shutdown Initiated Due to Indeterminate Structural Integrity of Charging Valve 2-CH-435.Repaired Valve (← links)
- 05000336/LER-1992-008-02, :on 920403,mounting & Bushings for Control Room Air Conditioning Compressors F-22 & A&B Determined to Be Nonseismic.Caused by Error in Original Seismic Analysis. Seismic Mounting Restraints Installed (← links)
- 05000336/LER-1995-042, :on 951115,failed to Perform SR 4.8.1.1.1, Offsite Line Verification Due to Inadequate Communication. Revised Procedure Sp 2619A to Ensure That TS Action Statement SRs Documented (← links)
- 05000336/LER-1995-043, :on 951115,reactor Core Power Exceeded Rated Thermal Power of 2,700 Mw for Period of 11 H.Caused by Personnel Error.Changed Procedure OP 2316A (← links)
- 05000336/LER-1995-041, :on 951030,SI & Containment Spray Sys Valves Operational Readiness Test Identified Potential for Placing EDG in Overloaded Condition.Caused by Deficient Procedure. Implemented Procedure Change to Sp 21136 (← links)
- 05000336/LER-1995-040, :on 951022,power Range Safety Channel & Delta T Power Channel Calibr Performed Beyond Required Frequency. Caused by Personnel Error.Briefed All Licensed Operators on Event as Part of Training (← links)
- 05000336/LER-1995-038, :on 951006,H Monitor Flowpath Deficiency Was Discovered.Caused by Design Deficiency.Provided Procedure Guidance in Operations Procedure That Would Provide Electrical Power to Outside Containment (← links)
- 05000336/LER-1995-039, :on 951010,SW Pump Performance SR Less Stringent than TS Due to Personnel Error.Performed Review Which Confirmed That Most Recent SW Test Results Met TS Requirements (← links)
- 05000336/LER-1984-009, :on 840703,during walk-through Fire Insp,While Plant at 75% Power,Discovered Door Between East & West 480-volt Switchgear Rooms Did Not Have Required Fire Rating. Door Replaced (← links)
- 05000336/LER-1995-037, :on 950923,determined That CEA TS SR Not Performed as Required on Previous Two Shifts Due to Lack of Debriefing,Communication Problems & TS Interpretation.Aop 2556, CEA Malfunctions Will Be Revised (← links)
- 05000336/LER-1995-036, :on 950922,identified That Quarterly Surveillance for Valve 2-SW-1A Missed Due to Personnel Error.Valve 2-SW-1A Tested & Verified Operable & IST Program Surveillances Reviewed (← links)
- 05000336/LER-1995-035, :on 950906,TS SR for AC Sys Was Misinterpreted Due to Personnel Error.Revised Plant Procedure (← links)
- 05000336/LER-1982-009-01, Review of ECCS Subsystem Revealed Mode Changes Occurred Operating Under Action Statement.Caused by Misinterpretation Between Tech Spec Sections.Tech Spec Changed to Reduce Confusion (← links)
- 05000336/LER-1995-034, :on 950822,TS Surveillance Was Missed Due to Personnel Error.Performed Surveillance Shortly After Time Interval Had Expired (← links)
- 05000336/LER-1995-033, :on 950809,manual RT Initiated Due to Loss of Atmospheric Dump Valve Control.Caused by Blown Fuse on Circuit Board in Control Circuit of Valve.Circuit Board Replaced & Valve Returned to Svc (← links)
- 05000336/LER-1995-031, :on 950803,CEA Not Able to Be Aligned W/Group in 1 H Required by TS Due to Power Supply Failure.Actions Specified in AOP 2556, CEA Malfunction,Section 4.3, Dropped Rod (← links)
- 05000336/LER-1995-029, :on 950728,determined That Insufficient RBCCW Flow Would Be Provided to ESF Rooms Ventilation Sys HX Following Sump Recirculation Actuation Signal.Repositioned Coolers X-36A & X-36B Discharge Valves (← links)
- 05000336/LER-1995-030, :on 950728,TS 3.0.4 Violated During Reactor Plant Heatup,When Formal Engineering Evaluation Not Completed Prior to Reaching 200 F.Procedure Changes & Operations Dept Briefings Implemented (← links)
- 05000336/LER-1992-006-01, :on 920302,design Deficiency Discovered for Letdown Isolation Valves Possibly Causing Failure of 24-volt Dc Bus.Caused by Design Error During Initial Plant Layout. Valves Added to Local Leak Rate Test Program (← links)
- 05000336/LER-1984-007-01, :During Mar 1984,at 100% Power,Monthly Surveillance for Thermal Margin/Low Pressure Operability Check Missed.Caused by Personnel Lack of Communication. Surveillance Performed (← links)
- 05000336/LER-1992-003-02, :on 920214,spent Fuel Pool Analysis Error Noted.Caused by Using Transport cross-sections as Approximation for Total cross-sections.Util Evaluating Spent Storage Rack Design Changes (← links)
- 05000336/LER-1992-004-01, :on 920211,facility 1 HPSI Train Header Isolation Valve 2-SI-656 Discovered Closed While in Mode 3. Caused by Procedural Deficiency.Subj Valve Immediately Opened & HPSI Sys Flow Path Restored (← links)
- 05000336/LER-1992-001-01, :on 920124,smoke Detectors Inadvertently Deleted from Semiannual Surveillance Procedure 2618C.Caused by Administrative Error.Reinforced Need to Verify Assumptions Valid Before Changes (← links)
- 05000336/LER-1995-028, :on 950704,inadvertent Actuation of ESAS Equipment Occurred.Caused by Inappropriate Wiring Practices. Changed Hardware Design to Reduce Sys Susceptibility to Electronic Noise (← links)
- 05000336/LER-1991-009, :on 910821,both EDGs Declared Inoperable.Caused by Load Swings Due to Oxidation Buildup on Relay Contacts. Governor Controls Sys on 12U DG & 13U DG Updated W/New Electronic Governor Actuator Controls (← links)
- 05000336/LER-1991-009-03, Forwards LER 91-009-03,reflecting Completion of Outstanding Corrective Action,Per 10CFR50.73(a)(2)(i) (← links)
- 05000336/LER-1995-027, :on 950624,identified That Fire Damper Not Included in Surveillance Program Due to Administrative Personnel Error.Ts Surveillance for Fire Dampers, Fire Damper Operability... (2618G-1) Revised (← links)
- 05000336/LER-1984-001, :on 840106 & 09,random Partial Actuation Occurred.Cause Unknown.Operating Parameters Verified Plant Sys Equipment Restored to Desired Status (← links)
- 05000336/LER-1994-020, :on 940722,determined That DG Fuel Oil Supply Less than IEEE Std.New Fuel Oil Consumption Calculation Performed Which Determines Length of Time DG Can Be Operated at Full Rated Capacity & TS Change Submitted (← links)
- 05000336/LER-1995-025, :on 950617,fire Watch Not Established in 45 Inch East Cable Vault for Period of 1 H & Two Minutes Due to Personnel Error.Continuous Fire Watch Established at Fire Door T-45-23 (← links)
- 05000336/LER-1991-012-01, :on 911106,8-inch Diameter Pipe Ruptured in Reheater Drain Tank to High Pressure Feedwater Heater Pipe, Resulting in Manual Reactor Trip.Caused by Erosion/Corrosion in Elbow.Ruptured Pipe Replaced (← links)
- 05000336/LER-1995-024, :on 950614,surveillance Frequency for Fire Detection Instrumentation Was Incorrect Due to Personnel Error.Revised Applicable Surveillance Procedure That Changed Frequency to Required semi-annual Interval (← links)
- 05000336/LER-1995-002, :on 950125,confirmed Assumption for Original Design Basis Re Containment Sump Isolation Valves non- Conservative.Caused by Inadequate Engineering Evaluation. Hole Drilled Through Disc Ctr Line (← links)
- 05000336/LER-1995-012, :on 950313,determined That RPS RCS Low Flow Trip Setting May Not Satisfy Assumptions in Sa.Caused by Excessive Component (Transmitter) Drift & Inadequate Design Review.Rcs Flow Transmitter Recalibrated (← links)
- 05000336/LER-1995-023, :on 950516,degradation of Boric Acid Sys Piping & Fittings Occurred Due to Periodic Boric Acid Leaks from Relief & Other Valves.Initiated Repairs & Replaced All Degraded Fittings & Pipe within Boric Acid Sys (← links)
- 05000336/LER-1995-021, :on 950517,design Error Confirmed to Be Present in Esas.Caused by ESAS Design Deficiency.Delay Circuit Installed on SIAS Actuation Module Relay Output (← links)
- 05000336/LER-1995-020, :on 950516,automatic Actuation of ESF Occurred During Maint Due to Inadequate Design of ESFAS Circuitry for Maint.Fans F25A & F32A Secured & Possible Changes to ESFAS Sys Will Be Investigated (← links)
- 05000336/LER-1991-006, :on 910330,Surveillance Requirement Section 4.0.5 Re Inservice Insp of ASME Code Class 1,2 & 3 Components Not Performed within 92 Day Interval.Caused by Inadequate Planning.Schedule Enhanced (← links)
- 05000336/LER-1983-023-03, /03L-0:on 830526,inservice Insp of Low Pressure Safety Injection B Detected Excessive Noise Emanating from Pump.Caused by Rubbing of Pump Impeller Lower Wear Ring Due to Worn Lower Bearing in Pump Motor (← links)
- 05000336/LER-1995-018, :on 950510,determined That Plant Entered Mode 6 from Defueled Condition W/O Satisfying TS 3.8.1.2.Caused by Design Error by Contact Reader Mfg.Mods Made to ESFAS Components (← links)
- 05000336/LER-1984-004, :on 840117,during Routine Startup at 50% Power, Irregularities Discovered in Response of ex-core Detectors Channels a & B.Field Inputs to Channels a & B of Linear Range (ex-core) Detector Drawers Reversed (← links)
- 05000336/LER-1995-017, :on 950503,contract Individual Assigned as Continous Fire Watch Found Sleeping in West 480 Volt Switch Gear Room.Caused by Personnel Error.Individual Replaced & Chairs Removed from Location (← links)
- 05000336/LER-1995-016, :on 950428,operator W/Inactive SRO License Assumed Position of Fuel Handling SRO for Movement of Upper Guide Structure Into Rv.Caused by Failure to Recognize Inactive Status.Briefing Conducted (← links)
- 05000336/LER-1982-049-01, Fire Water Storage Tanks a & B Found at 190,153 Gallons & 190,074 Gallons, Respectively.Caused by Stripped Gear in Makeup Valve Operator a & Sticking Brake in Operator B (← links)
- 05000336/LER-1983-018-03, Reactor Protection Sys Channel A,Low Steam Generator Pressure Bypass Removal Setpoints Found Out of Spec in Nonconservative Direction. Caused by Instrument Shift.Setpoints Adjusted (← links)
- 05000336/LER-1982-008-03, Reactor Coolant Pump Speed Sensing Bistable Trip Setpoint Found Out of Spec. Caused by Instrument Drift.Bistable Trip Unit Replaced.W/ (← links)
- 05000336/LER-1995-015, :on 950418,crane Operation Over Spent Fuel Pool W/Emergency Ventilation Inoperable Occurred Due to Disassembly of Main Exhaust Fan.Installed Bypass Jumper to Blank Off Opening in Ductwork (← links)
- 05000336/LER-1982-053-03, /03L-0:on 821228,while Placing C Reactor Bldg Closed Cooling Water (RBCCW) Back in Svc,Operator Failed to Align B RBCCW W/Svc Water Header.Caused by Personnel Error. Use of Procedures re-emphasized W/Dept Personnel (← links)
- 05000336/LER-1982-052-03, /03L-0:on 821231,leak Found on Discharge of C Svc Water Pump.B Svc Water & high-pressure Safety Injection (HPSI) Pumps Were Lined Up to Facility II Emergency Bus Leaving One HPSI Operable.Caused by Shutdown of C Svc Pump (← links)
- 05000336/LER-1983-031-01, /01T-0:on 831222,discovered That Schedule 40 Vs Std Wall Pipe Installed in Portions of Svc Water Sys.Caused by Matl Unavailability.Stress Analysis Updated & Four Hangers Modified (← links)
- 05000336/LER-1982-043-03, During Power Ascension, Broken Hydraulic Snubber Stud Discovered & Traced to Hanger 490001 on Main Steam Lead to High Pressure Turbine.Caused by Constant High Vibration (← links)
- 05000336/LER-1983-030-01, /01T-0:on 831205,fuel Movement Took Place in Spent Fuel Pool,While Credit Taken for Facility Encl Bldg B Filtration Sys (Ebfs).Ebfs Inoperable Due to Installation of Temporary Wall Not Seismically Qualified (← links)
- 05000336/LER-1995-014, :on 950404,continuous Fire Watch Was Found Sleeping in West 480 Volt Switchgear Room Due to Personnel Error.Posted Another Individual as Fire Watch (← links)
- 05000336/LER-1991-008, :on 910525,reactor Tripped Due to Low Steam Generator Pressure.Caused by Ineffective Coordination Between Reactor & Turbine Shutdown.Cr Operating Shift Completed Applicable Portions of EOP-2525 (← links)
- 05000336/LER-1983-029-01, /01T-0:on 831123,while Shutdown,Containment Pressure Sensor Instrument Tubing Found Not Supported Per Generic Seismic Support Guidelines.Caused by Support Spacing Exceeded When Tubing Span Lengths Increased (← links)
- 05000336/LER-1983-025-01, 15 Fuel Assemblies Identified W/One Broken hold-down Spring & Fuel Assemblies Found W/Noticeable hold-down Spring Wear.Caused by Vibration.New Fuel Will Have New Spring Design (← links)
- 05000336/LER-1983-028-03, /03L-0:on 831029,during Refueling Operations,Spent Fuel Pool Gate Traveled Over Irradiated Fuel Assemblies in Spent Fuel Pool.Load Could Not Be Positioned Over Designated Path Due to Limitations on Travel of Crane (← links)
- 05000336/LER-1995-011, :on 950316,determined That EHC Pressure Switches Not Isolated from RPS Circuitry Due to Inadequate Design Control.Design Engineering Reviewing Listed Potential Options for Corrective Actions (← links)
- 05000336/LER-1995-013, :on 950314,SPEC 200 Cabinet Electrical Separation Was Not Maintained Due to Installation Error During Original Installation of ATWS Circuit.Enclosed Wiring in Flexible Conduit (← links)
- 05000336/LER-1995-010, :on 950303,determined That Each Circuit Contained an Auxiliary Contact Off Smoke Detector Circuit Which de-energizes Fan During Fire.Caused by Inadequate Design.Design Change Being Processed (← links)
- 05000336/LER-1983-027-03, /03L-0:on 830926,during Refueling as Received Steam Set Pressure Test 2-RC-201 Performed.Valve Failed Test Exceeding Set Pressure by Greater than 1%.Cause Unknown.Valve Rebuilt (← links)
- 05000336/LER-1995-009, :on 950304,determined That RBCCW Sys Outside of Design Basis.Caused by Failure to Update FSAR Prior to Initial Startup.Ist Has Been Written to Obtain & Adjust Flow Rates,As Needed,To Various RBCCW Loads (← links)
- 05000336/LER-1991-008-02, :on 910525,reactor Trip Occurred.Caused by Steam Generator Pressure.Actions to Address Coordination Shortcomings Exhibited by Opening Shift Implemented (← links)
- 05000336/LER-1995-008, :on 950221,determined That Vital DC Switchgear Rooms Vital Chillers Could Fail During Periods of Low SW Temp.Caused by Inadequate Design.Isolated Flow Control Valves & Using Bypass Valves to Control Flow (← links)
- 05000336/LER-1995-007, :on 950219,fire Watch Found Sleeping in Auxiliary Bldg.Caused by Personnel Error.New Fire Watch Assigned to Affected Areas & Tours of Continuous Posts by Fire Watch Supervisors Increased (← links)
- 05000336/LER-1995-006, :on 950213,determined That Unit 1 Swing Bus Relay Power Supply Wiring Not Separated from Unit 2 Swing Bus Power Supply Wiring.Caused by Installation Error. Wiring Encl in Flexible Conduit (← links)
- 05000336/LER-1995-005, :on 950211,inadvertent Actuation of ESF Equipment Occurred.Caused by Wiring Error During Const of Cabinets Combined W/Plant Mod.Verified All Cabinets & Actuation Relay Wiring for Correct Polarity (← links)
- 05000336/LER-1995-004, :on 950131,TS Surveillance for Liquid Waste Radiation Monitor Was Missed Due to Personnel Error. Performed Surveillances to Satisfactory Completion on Following Day (← links)
- 05000336/LER-1995-003, :on 950130,intake Structure Ventilation Sys Deficiencies Noted.Caused by Allowing non-Category 1 Exhaust Fans to Provide Cooling for Category 1 SW Pump Motors.No Immediate Corrective Action Taken (← links)
- 05000336/LER-1995-002-01, :on 950125,confirmed That Assumptions Made for Original Design Basis Analysis for Containment Sump Isolation Valve non-conservative.Caused by Inadequate Evaluation.Second Review Completed (← links)
- 05000336/LER-1984-002-01, :on 840111,level in Steam Generator 1 Increased.Manual Control Initiated to Stop Increase & Reactor Tripped.Caused by Adjustments Made to New Feedwater Regulating Control Sys.Valves Closed (← links)
- 05000336/LER-1984-002, :on 840111,reactor Tripped as Level Decreased to 38.5% & Reached 37.2%.During Transient,Average Temp Fell to 509 F & Steam Generator Pressure Fell to 740 Psia.Caused by Feedwater Regulating Adjustments (← links)
- 05000336/LER-1995-001, :on 950118,crane Operated Over Spent Fuel Pool While Enclosure Bldg Ventilation Sys Inoperable.Caused by Inadequate or Insufficient Procedures.Ts 3.9.7,3.9.14 & 3.19.15 Will Be Reviewed for Clarifications (← links)
- 05000336/LER-1994-017, :on 940601,inadvertent ESAS Actuations Occurred.Caused by Deenergizing of Engineered ESAS Facility 2 Actuation Cabinet.Revised Operations Procedure 2384 (← links)
- 05000336/LER-1994-026, :on 940825,vital 120 Volt AC Sys Degraded. Caused by Inadequate Design in Coordination of H Analyzer Power Supply.Change Was Implemented to Install Fuses (← links)
- 05000336/LER-1994-041, :on 941208,review of Event That Occurred on 941020 Indicated Loss of Electrical Facility Separation. Caused by Degraded Condition of Floor Drains.Immediate Isolation of SW Flow Initiated (← links)
- 05000336/LER-1984-003, :on 840103,safety Injection Tanks 2 & 3 Fell Below Min Level.During Filling,Valves Closed.Caused by Residual Water Collected in Dry Ref Legs.Tanks Lowered,Legs Drained & Instruments Calibr (← links)
- 05000336/LER-1994-033, :on 941031,loss of Containment Integrity Discovered During Course of Irradiated Fuel Movement within Containment.Caused by Failed Ventilation Exhaust Damper.Fuel Movement Stopped (← links)
- 05000336/LER-1994-035, :on 941102,discovered That Roving Fire Watch Established for Breached Electrical Penetration When Requirement for Continuous Fire Watch.Caused by Personnel Error.Continuous Fire Watch Established (← links)
- 05000336/LER-1983-032-03, /03L-0:on 831214,during Loss of Normal Power Test on Facility Z1,diesel Generator 12U Started But Failed to Sequence on Emergency Loads.Caused by Lack of Breaker Permissive Inputs.Connection Resoldered (← links)
- 05000336/LER-1994-037, :on 941120,personnel Discovered That 18 Month Surveillance for a Battery Charger Capacity Had Not Been Performed within Required Surveillance Period.Caused by Personnel Error.Charger Will Be Replaced (← links)
- 05000336/LER-1994-038, :on 941026,identified That Local Leak Rate Testing Not Adequately Performed on Containment Penetrations.Caused by Personnel Error.Revs to Surveillance Procedure Sp 2605D Initiated (← links)
- 05000336/LER-1994-032, :on 941028,post Incident Recirculation Fan Flow Below Design Occurred.Cause Unknown.Work Scheduled to Adjust Fan Blades as Necessary to Achieve Required Air Flow Rate.W/ (← links)
- 05000336/LER-1994-030, :on 941001,MSSV Setpoint Drift Occurred.Root Cause Unknown.Six of Ten Failed Valves Adjusted & Passed Subsequent Retests.Two Valves Passed Subsequent Tests W/O Adjustment (← links)
- 05000336/LER-1994-029-01, :on 941003,control Technicians Secured Sample Flow to Stack Gaseous & Particulate Radiation Monitor Skid to Support Preventive Maint.Caused by Program/Procedure Deficiency.Alternate Sampling Initiated (← links)
- 05000336/LER-1994-042, :on 941222,unqualified ESAS Power Suppliers Installed.Caused by Lack of Procedural Detail for Making Notification to Plant.Power Suppliers Replaced as Part of 1994 Refueling Outage (← links)
- 05000336/LER-1994-028-01, :on 940923,TS Surveillance Not Performed within Required Time Interval Due to Assuming That 24 Month LLRT Began After LLRTs Completed from Current Refuel Outage.Past LLRT Surveillance Intervals Reviewed (← links)
- 05000336/LER-1994-024, :on 940922,B DG Removed from Svc for Monthly Surveillance Run & a DG Declared Inoperable After Receiving DG Disable Alarms in Cr.Cause of Event Unknown.Alarms Reset, Quick Start Performed & a DG Declared Operable (← links)
- 05000336/LER-1983-003-04, /04T-0:on 830817,during Refueling Operations, Liquid Discharge from Aerated Waste Monitor Tank Made.During Discharge Radiation Monitor Recorder Failed.Caused by Vibration of Recorder (← links)
- 05000336/LER-1994-036, :on 941104,discovered 18 Month Surveillance of Fire Protection Coating Insp Had Not Been Performed within Required Period.Caused by Program Failure & Mgt Deficiency.Surveillance Completed on 941105 (← links)
- 05000336/LER-1994-034, :on 941101,spent Fuel Pool Door Opened While Fuel Was Being Moved in Sfp.Caused by Personnel Error.Addl Controls to Prevent Further Breaches of Ventilation Boundaries Were Implemented (← links)
- 05000336/LER-1994-031-01, :on 941018,fire Watch Not Established within a DG Room for Period of Five H.Caused by Personnel Error. Continuous Fire Watch Established & Security Supervisor Disciplined (← links)
- 05000336/LER-1983-019-03, /03L-1:on 830528,following Reactor Trip from 40% Power,Greater than 1.0 Uci Per G I-131 Indicated in Primary Coolant.Caused by Degraded Fuel Pins.Results of Fuel Sipping Performed 830622-30 Encl (← links)
- 05000336/LER-1991-006-01, :on 910330,missed Surveillance Occurred.Caused by Inadequate Planning & Supervisory Review.Complete Surveillance Procedure 21136 by Verifying Stroke of 2-SI-635 & Stroke Times of Two Valves in Question (← links)
- 05000336/LER-1983-022-03, /03L-0:on 830528,while Cooling Down ESF Actuation Sys,Pressurizer Pressure Block Permissive Alarmed in Nonconservative Direction.Caused by Personnel Error.Event Covered in Detail in Training Session (← links)
- 05000336/LER-1994-025-01, :on 940907,seismic Monitor Recorder Inoperable for Greater than 30 Days.Caused by Personnel Error.Recorder Repaired (← links)
- 05000336/LER-1983-007-01, /01T-0:on 830318,nonconservative Safety Analysis Assumption Discovered in Steam Generator Tube Rupture Analysis.Caused by Failure of Analysis to Consider Impact of Automatic Valves.Analyses Will Be Docketed Shortly (← links)
- 05000336/LER-1983-005-03, /03L-0:on 830301,during Full Power,Rcs Unidentified Leak Rate Found in Excess of Tech Specs.Caused by Leaks in Valves 2-RC-405,2-SI-247 & Steam Generator Tube. Leaks Plugged (← links)
- 05000336/LER-1983-008-01, /01T-0:on 830318,transfer from Auxiliary Feedwater to Main Feedwater Caused Temp Transient Resulting in Momentary Power Spike Prohibited by Tech Specs.Caused by Overfeeding Steam Generators.Rods Inserted (← links)
- 05000336/LER-1980-012-03, During Power Operation, Hydraulic Snubber on Hangar 490001 Found W/No Visible Fluid Level.Caused by Seal Deterioration.Snubber Replaced (← links)
- 05000336/LER-1981-011-03, Accessible safety-related Intl Nuclear Safeguards Co Mechanical Snubbers Stroke Tested Per IE Bulletin 81-01.Fifteen Snubbers Failed to Stroke.Caused by Generic Problems.Snubbers Replaced (← links)
- 05000336/LER-1981-018-03, Mechanical Snubber Discovered Omitted from IE Bulletin 81-01 Evaluation List. No Cause Stated.Snubbers Reviewed & Reclassified as safety-related.Thirty-nine Snubbers Failed Stroke Test (← links)
- 05000336/LER-1991-003-01, :on 910212,loss of DC Switchgear Cooling During Loss of Instrument Air Due to Design Inadequacy.Loss of Air, Revised to Warn Operator of Loss of Normal Chill Water Flow to DC Switchgear Coolers & Vital Water Supply (← links)
- 05000336/LER-1981-036-03, Intl Nuclear Safeguards Co Mechanical Snubbers Replaced W/Pacific Scientific Snubbers.Action Based on Generic Problems Identified in IE Bulletin 81-01 (← links)
- 05000336/LER-1983-006-03, /03L-0:on 830219,while in Mode 3,hot Standby Conditions,Only One HPSI Pump Was Operable.Caused by Svc Water Pump C Shutdown for Leak Repair on Strainer C.Svc Water Strainer C Repaired (← links)
- 05000336/LER-1994-023-01, :on 940725,Charging Pump B Inadvertently Started Due to Failure of Selector Switch When Operator Changed Switch Position.Switch Will Be Replaced During Upcoming Refueling Outage (← links)
- 05000336/LER-1994-013, :on 940510,discovered That 18 Month Surveillance Sp 2614D Not Performed within Required Surveillance Period.Caused by Personnel Error.Surveillance Performed Immediately (← links)
- 05000336/LER-1983-020, :Ongoing Eddy Current Exams Identified Number of Steam Generator Tubes W/Defects Which Required Both Steam Generators to Be Placed in C-3 Insp Category.Frequency of Occurrence Primarily on Cold Leg Side (← links)
- 05000336/LER-1983-001-04, /04T-0:on 830302,recorder Associated W/Liquid Radwaste Discharge Path Rjr 9129 Failed While in Mode 3 at 532 F.Caused by Stripped Gear on Drive Motor.Defective Gear & Motor Replaced (← links)
- 05000336/LER-1983-002-03, /03L-0:on 830127,discovered Surveillance for Charging Pump Operability Not Performed within Required Period.Caused by Personnel Error.Dept Instruction & Operator Reinstruction Instituted,Covering Surveillance Deadlines (← links)
- 05000336/LER-1983-016-03, /03L-0:on 830421,steam-driven Auxiliary Feedwater Pump Removed from Svc for Repacking.Caused by Natural End of Life Failure.Pump Repacked,Tested & Returned to Svc (← links)
- 05000336/LER-1982-026-03, /03L-0:on 820623,three Containment Air Radiation Monitors (8123A,8262A & 8262B) Found W/Function Swithces in Incorrect Position.Caused by Techician Error & Procedural Deficiency.Technicians Cautioned & Procedure Revised (← links)
- 05000336/LER-1983-015-03, /03L-0:on 830421,control Element Assembly (CEA) 62 Dropped Fully Into Core.Cause Unknown.Coil Programmer Power Main & Backup Supplies Tested & Found Satisfactory.Cea Withdrawn & Power Returned to 100% (← links)
- 05000336/LER-1994-022-01, :on 940620,second Analyzer Failed Surveillance Test.Caused by Timer Switch Left in Off Position in Accordance W/Operating Procedure.I&C Repaired Defective Unit & Surveillance Sp 2403C Performed (← links)
- 05000336/LER-1983-001-03, /03L-0:on 830121,plant Computer Malfunctioned & Declared Inoperable.Caused by Defective Seek Relay Drive Card.Card Replaced & Computer Operation Restored (← links)
- ML061220570 (redirect page) (← links)
- 05000336/LER-2006-007, Cancellation of Licensee Event Report MP2-2006-007-00 (← links)
- 05000336/LER-2006-008, Regarding Scaffold Impairment of Turbine Driven Auxiliary Feedwater Pump Room HELB Blowout Panel (← links)
- 05000336/LER-2006-006-01, Regarding Scaffolding Built for Work on Main Steam Isolation Valve (2-MS-64A) Prevented the Valve from Closing (← links)
- 05000336/LER-2006-004, Re Failure to Enter the Technical Specification Action Statement for Inoperable Reactor Protection System Trips (← links)
- 05000423/LER-2006-001, Re Loss of Safety Function of the Control Room Emergency Ventilation System (← links)
- 05000336/LER-2006-003, Regarding Technical Specifications Required Shutdown (← links)
- 05000336/LER-2006-001-01, Regarding Loss of Charging Function (redirect page) (← links)
- ML061580593 (redirect page) (← links)
- 05000336/LER-2006-001-01 (redirect page) (← links)
- 05000336/LER-2006-002, Manual Reactor Trip Due to Trip of Both Feed Pumps Following a Loss of Instrument Air (← links)