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| Issue date | Title | Topic | |
|---|---|---|---|
| 05000000/LER-1950-237, Updated LER 50-237/01L:on 760406,unacceptable Ultrasonic Indication Found on Isolation Condenser safe-end.Caused by Cracks in safe-ends.Cracked safe-end Removed & Sent to Bmcl for Metallographic Analysis | 13 July 1976 | Updated LER 50-237/01L:on 760406,unacceptable Ultrasonic Indication Found on Isolation Condenser safe-end.Caused by Cracks in safe-ends.Cracked safe-end Removed & Sent to Bmcl for Metallographic Analysis | |
| 05000000/LER-1977-005, Updated LER 77-005/1T:on 770114,failure of High Pressure Svc Water/Emergency Svc Water & Emergency Cooling Water Pumps to Meet FSAR Seismic Requirements Noted.Caused by Change in Calculation Techniques | 28 January 1977 | Updated LER 77-005/1T:on 770114,failure of High Pressure Svc Water/Emergency Svc Water & Emergency Cooling Water Pumps to Meet FSAR Seismic Requirements Noted.Caused by Change in Calculation Techniques | |
| 05000000/LER-1986-001, Partially Deleted LER 86-001-00:on 860105,loss of Dynamic Reporting of Vital Door Activity Occurred.Cause & Corrective Action Completely Deleted | 10 January 1986 | Partially Deleted LER 86-001-00:on 860105,loss of Dynamic Reporting of Vital Door Activity Occurred.Cause & Corrective Action Completely Deleted | |
| 05000000/LER-1986-002, Partially Deleted LER 86-002-00:on 860117,loss of Alarm Surveillance on Doors Occurred.Caused by Erroneously Listing Officer as Being Posted on Door 398.Processing of Rev to Physical Security Plan Initiated | 23 January 1986 | Partially Deleted LER 86-002-00:on 860117,loss of Alarm Surveillance on Doors Occurred.Caused by Erroneously Listing Officer as Being Posted on Door 398.Processing of Rev to Physical Security Plan Initiated | |
| 05000000/LER-1986-003, Partially Deleted LER 86-003-00:on 860125,loss of Dynamic Reporting of Vital Area Door Activity Occurred.Caused by Equipment Malfunction.Corrective Action Withheld | 29 January 1986 | Partially Deleted LER 86-003-00:on 860125,loss of Dynamic Reporting of Vital Area Door Activity Occurred.Caused by Equipment Malfunction.Corrective Action Withheld | |
| 05000000/LER-1986-004, Partially Deleted LER 86-004-01:on 860204,loss of Dynamic Reporting of Alarm Surveillance Occurred.Cause Withheld. Computer Svcs Personnel Will Continue to Monitor Sys for Indicators of Cause | 11 June 1986 | Partially Deleted LER 86-004-01:on 860204,loss of Dynamic Reporting of Alarm Surveillance Occurred.Cause Withheld. Computer Svcs Personnel Will Continue to Monitor Sys for Indicators of Cause | |
| 05000000/LER-1986-007, Partially Deleted LER 86-007-01:on 860218,loss of Alarm Surveillance Occurred.Caused by Water Leaking Into Cable Due to Heavy Rain.Cable Dried,Leak Repaired & Design Corrected | 6 October 1986 | Partially Deleted LER 86-007-01:on 860218,loss of Alarm Surveillance Occurred.Caused by Water Leaking Into Cable Due to Heavy Rain.Cable Dried,Leak Repaired & Design Corrected | |
| 05000000/LER-1986-009, Ro:On 860312,discovered That LER 2-86-04 & LER 86-009 Not Submitted to Nrc.Caused by Misplaced Repts.Repts Telecopied to Nrc.Procedure for Distribution of Repts Revised | 14 April 1986 | Ro:On 860312,discovered That LER 2-86-04 & LER 86-009 Not Submitted to Nrc.Caused by Misplaced Repts.Repts Telecopied to Nrc.Procedure for Distribution of Repts Revised | |
| 05000000/LER-1986-011, Partially Deleted LER 86-011-00:on 860410,vital Area Intrusion Alarm Failure Occurred.Cause of Event Deleted. Alarm & Door Tested Satisfactorily | 15 April 1986 | Partially Deleted LER 86-011-00:on 860410,vital Area Intrusion Alarm Failure Occurred.Cause of Event Deleted. Alarm & Door Tested Satisfactorily | |
| 05000000/LER-1986-012, Partially Deleted LER 86-012-00:on 860412,breach Discovered in Protected Area Barrier.Caused by Personnel Error. Personnel Counseled | 17 April 1986 | Partially Deleted LER 86-012-00:on 860412,breach Discovered in Protected Area Barrier.Caused by Personnel Error. Personnel Counseled | |
| 05000000/LER-1986-013, Partially Deleted LER 86-013-00:on 860414,vital Area Door W/O Alarm Capability Discovered.Caused by Personnel Error. Personnel Removed from Shift & Vital Area Checked for Unauthorized Personnel W/None Being Found | 18 April 1986 | Partially Deleted LER 86-013-00:on 860414,vital Area Door W/O Alarm Capability Discovered.Caused by Personnel Error. Personnel Removed from Shift & Vital Area Checked for Unauthorized Personnel W/None Being Found | |
| 05000000/LER-1986-014, Partially Deleted LER 86-014-00:on 860421,bomb Threat Received by Security Officer in Security Assembly Room. Cause Not Applicable.Actions Taken to Minimize Station Threat & Investigation Underway | 25 April 1986 | Partially Deleted LER 86-014-00:on 860421,bomb Threat Received by Security Officer in Security Assembly Room. Cause Not Applicable.Actions Taken to Minimize Station Threat & Investigation Underway | |
| 05000000/LER-1986-015, Partially Deleted LER 86-015-00:on 860428,stationary Side of Door Failed to Alarm When Tested.Cause Withheld.Alarm Repaired | 2 May 1986 | Partially Deleted LER 86-015-00:on 860428,stationary Side of Door Failed to Alarm When Tested.Cause Withheld.Alarm Repaired | |
| 05000000/LER-1986-016, Partially Deleted LER 86-016-00:on 860501,vital Area Door Discovered W/O Alarm Capabilities.Caused by Access Control Security Officer Asleep at Post.Determination to Suspend or Discontinue Employment Being Made | 6 May 1986 | Partially Deleted LER 86-016-00:on 860501,vital Area Door Discovered W/O Alarm Capabilities.Caused by Access Control Security Officer Asleep at Post.Determination to Suspend or Discontinue Employment Being Made | |
| 05000000/LER-1986-020, Partially Deleted LER 86-020-00:on 860812,security Sys Experienced Loss of Power.Caused Withheld.Numerous Failures Experienced Until Machine a Designated as Prime.Procedures to Reboot Computers Revised | 15 August 1986 | Partially Deleted LER 86-020-00:on 860812,security Sys Experienced Loss of Power.Caused Withheld.Numerous Failures Experienced Until Machine a Designated as Prime.Procedures to Reboot Computers Revised | |
| 05000000/LER-1986-021, Partially Deleted LER 86-021-00:on 860911,vital Area Doors Failed to Alarm When Tested During Surveillance.Caused by Failure to Report Door Transactions to Host Computer.Central Procesing Unit Board Replaced | 15 September 1986 | Partially Deleted LER 86-021-00:on 860911,vital Area Doors Failed to Alarm When Tested During Surveillance.Caused by Failure to Report Door Transactions to Host Computer.Central Procesing Unit Board Replaced | |
| 05000000/LER-1986-022, Partially Deleted LER 86-022-02:on 861018,potential Undetected Access Into Vital Area Discovered.Caused by Use of Incorrect Procedure.Card Reader Replaced & Tested to Ensure Proper Operation | 20 February 1987 | Partially Deleted LER 86-022-02:on 861018,potential Undetected Access Into Vital Area Discovered.Caused by Use of Incorrect Procedure.Card Reader Replaced & Tested to Ensure Proper Operation | |
| 05000000/LER-1986-023, Partially Deleted LER 86-023-01:on 861023,unauthorized Access Into Vital Area Door Discovered.Caused by Card Reader Malfunction.Malfunctioning Card Reader Replaced.Cause Still Under Investigation | 21 November 1986 | Partially Deleted LER 86-023-01:on 861023,unauthorized Access Into Vital Area Door Discovered.Caused by Card Reader Malfunction.Malfunctioning Card Reader Replaced.Cause Still Under Investigation | |
| 05000000/LER-1986-024, Partially Deleted LER 86-024-00:on 861113,attempted Introduction of Unauthorized Weapon Into Protected Area Discovered.Caused by Personnel Attempt to Enter Plant W/ Concealed Gun.Personnel Denied Facility Access | 18 November 1986 | Partially Deleted LER 86-024-00:on 861113,attempted Introduction of Unauthorized Weapon Into Protected Area Discovered.Caused by Personnel Attempt to Enter Plant W/ Concealed Gun.Personnel Denied Facility Access | |
| 05000000/LER-1986-026, Partially Deleted LER 86-026-00:on 861124,vital Area Door Discovered W/O Alarm Capability.Caused by Personnel Error. Secutiry Officer in Question Terminated & Function of Administrative Sergeant Reviewed | 1 December 1986 | Partially Deleted LER 86-026-00:on 861124,vital Area Door Discovered W/O Alarm Capability.Caused by Personnel Error. Secutiry Officer in Question Terminated & Function of Administrative Sergeant Reviewed | |
| 05000000/LER-1986-030, Partially Deleted LER 86-030-00:on 861211,unauthorized Opening Into Protected Area Discovered.Caused by Area Not Properly Identified as Area for Security Concern.Signs Posted | 16 December 1986 | Partially Deleted LER 86-030-00:on 861211,unauthorized Opening Into Protected Area Discovered.Caused by Area Not Properly Identified as Area for Security Concern.Signs Posted | |
| 05000000/LER-1986-052, Partially Withheld LER 86-052-01:on 860926,security Data Mgt Sys Computer Terminals Became Inoperable (Ref 10CFR73.21). Caused by Overload of Alarms & Sys Instability.Sys Restored by Placing Sys Multiplexers Online | 13 November 1986 | Partially Withheld LER 86-052-01:on 860926,security Data Mgt Sys Computer Terminals Became Inoperable (Ref 10CFR73.21). Caused by Overload of Alarms & Sys Instability.Sys Restored by Placing Sys Multiplexers Online | |
| 05000219/LER-1981-061, Updated LER 81-061/03X-1:on 811223,of 11 Deficient Hydraulic Snubbers,Nine Found to Be Inoperable During Functional Testing.Caused by Seal Degradation &/Or Worn Poppet Valves. Snubbers Replaced W/Operable Spares | 25 May 1982 | Updated LER 81-061/03X-1:on 811223,of 11 Deficient Hydraulic Snubbers,Nine Found to Be Inoperable During Functional Testing.Caused by Seal Degradation &/Or Worn Poppet Valves. Snubbers Replaced W/Operable Spares | |
| 05000219/LER-1982-026 | 7 June 1982 | LER 82-026/03L-0:on 820507,thermocouple for Safety Valve NR28J Found Open During Surveillance Testing.Caused by Broken Lead Wire at Thermocouple.One of Adjacent Valve Acoustic Monitor Setpoints Reduced.Thermocouple Replaced | |
| 05000219/LER-1984-020, Errata to LER 84-020-01,consisting of Page 4 Re Corrective Actions.Preventive Maint Request Initiated to Store Overload Devices in Vertical Position | 23 September 1985 | Errata to LER 84-020-01,consisting of Page 4 Re Corrective Actions.Preventive Maint Request Initiated to Store Overload Devices in Vertical Position | |
| 05000219/LER-1990-008 | 23 July 1990 | LER 90-008-00:on 900625,reactor Scram Occurred on Low Condenser Vacuum.Caused by Failure of Backwash Outlet Valve to Open,Causing Loss of Circulating Water to Condenser A. Plant Stabilized & Taken to Cold shutdown.W/900723 Ltr | |
| 05000289/LER-1977-016, Supplemental LER 77-016/01T:on 770924,emergency Core Cooling Actuation Occurred.Caused by Full Open Pressurizer Power Relief Valve.Valve Closed | 14 February 1977 | Supplemental LER 77-016/01T:on 770924,emergency Core Cooling Actuation Occurred.Caused by Full Open Pressurizer Power Relief Valve.Valve Closed | |
| 05000289/LER-1982-001, Updated LER 82-001/01T-2:on 820225,during Control Room Habitability Review of NUREG-0737,Item III.D.3.4,potential Discovered for Contaminated Air to Enter Area Served by Control Bldg Ventilation Sys.Flange Installed | 7 September 1983 | Updated LER 82-001/01T-2:on 820225,during Control Room Habitability Review of NUREG-0737,Item III.D.3.4,potential Discovered for Contaminated Air to Enter Area Served by Control Bldg Ventilation Sys.Flange Installed | |
| 05000289/LER-1982-004 | 14 April 1982 | LER 82-004:on 820413,EPRI Tests on Pressurizer Code Safety Valves Revealed Failure to Determine Ability of Valve to Perform Under Feed & Bleed Cooling If Pressurizer Power Operated Relief Valve Isolated.Investigation Underway | |
| 05000289/LER-1983-003, Updated LER 83-003/01T-1:on 830211,PORV Special Insp Revealed Corrosion.Caused by Use of Acid Sulfur Compounds. PORV Internals Replaced & Leak Tested & Pressurizer Steam Space Inspected | 6 June 1983 | Updated LER 83-003/01T-1:on 830211,PORV Special Insp Revealed Corrosion.Caused by Use of Acid Sulfur Compounds. PORV Internals Replaced & Leak Tested & Pressurizer Steam Space Inspected | Loop seal |
| 05000289/LER-1983-046, Revised LER 83-046/01T-1:on 831214,nuclear safety-related Circuit for make-up Pump Lube Oil Pressure Trip Found Incorrectly Routed.Caused by Design Oversight.Circuits for make-up Pumps Rerouted in Raceways | 31 January 1984 | Revised LER 83-046/01T-1:on 831214,nuclear safety-related Circuit for make-up Pump Lube Oil Pressure Trip Found Incorrectly Routed.Caused by Design Oversight.Circuits for make-up Pumps Rerouted in Raceways | |
| 05000289/LER-1984-007, Corrected LER 84-007-01:on 841116,once-through Steam Generator a Tubes Identified as Category C-3 Defective (More than 1% of Insp Tubes Defective).Further Manifestation of Problem Found During 1981 & 1982 Testing | 31 May 1985 | Corrected LER 84-007-01:on 841116,once-through Steam Generator a Tubes Identified as Category C-3 Defective (More than 1% of Insp Tubes Defective).Further Manifestation of Problem Found During 1981 & 1982 Testing | |
| 05000320/LER-1979-015, Sanitized Version of LER 79-015/13L-1:on 790328,during Investigation of Radwaste & Makeup Sys,Three People Received Radiation Doses in Excess of Quarterly Limit.One Person Received Excess Dose to Skin.Investigation Suspended | 10 June 1982 | Sanitized Version of LER 79-015/13L-1:on 790328,during Investigation of Radwaste & Makeup Sys,Three People Received Radiation Doses in Excess of Quarterly Limit.One Person Received Excess Dose to Skin.Investigation Suspended | |
| AECM-84-0204, Special Rept 84-017/0:on 840304,Fire Doors 1A401 & OC219 Blocked Open to Support Maint Activities.Fire Watches Established Until Doors Restored | 6 April 1984 | Special Rept 84-017/0:on 840304,Fire Doors 1A401 & OC219 Blocked Open to Support Maint Activities.Fire Watches Established Until Doors Restored | |
| B12541, Rev 10 to QA Program Topical Rept | 30 June 1987 | Rev 10 to QA Program Topical Rept | Boric Acid Probabilistic Risk Assessment Nondestructive Examination Condition Adverse to Quality Fire Protection Program Backfit |
| B12822, Annual Rept for 1987 | 31 December 1987 | Annual Rept for 1987 | Hot Short Safe Shutdown Boric Acid Loop seal Packing leak High Radiation Area Fire Barrier Stroke time Safe Shutdown Earthquake Hydrostatic Emergency Lighting Excess Flow Check Valve Earthquake Control of Heavy Loads Turbine Missile Biofouling Scaffolding Unidentified leakage |
| B13145, & Millstone Station Units 1,2 & 3,Annual Rept for 1988 | 31 December 1988 | & Millstone Station Units 1,2 & 3,Annual Rept for 1988 | |
| BECO-85-220, Partially Withheld Security Event Rept:On 851204 Vertical Pipe Chase Not Locked.Lock Removed When Surveys Indicated Radiation Level Below Requirement for Locked High Radiation Level.Pipe Chase Will Be Secured | 9 December 1985 | Partially Withheld Security Event Rept:On 851204 Vertical Pipe Chase Not Locked.Lock Removed When Surveys Indicated Radiation Level Below Requirement for Locked High Radiation Level.Pipe Chase Will Be Secured | |
| BECO-86-016, Partially Withheld Security Event Rept:On 860215 Security Officer Appeared to Be Asleep at Post at Vital Area Penetration.Unathorized Entry of Vital Area Did Not Occurr. Security Officer Relieved of Duty & Suspended | 20 February 1986 | Partially Withheld Security Event Rept:On 860215 Security Officer Appeared to Be Asleep at Post at Vital Area Penetration.Unathorized Entry of Vital Area Did Not Occurr. Security Officer Relieved of Duty & Suspended | |
| BECO-86-125, Partially Withheld Security Event Rept:On 860826,bomb Threat Received.Search Initiated.No Suspicious Objects Found | 29 August 1986 | Partially Withheld Security Event Rept:On 860826,bomb Threat Received.Search Initiated.No Suspicious Objects Found | |
| BECO-86-171, Partially Withheld Security Event Rept:On 861106,temporary Vital Area Barrier Insp Found Barrier Could Be Breached. Barrier Modified & Compensatory Security Measures Released | 10 November 1986 | Partially Withheld Security Event Rept:On 861106,temporary Vital Area Barrier Insp Found Barrier Could Be Breached. Barrier Modified & Compensatory Security Measures Released | |
| BECO-86-173, Partially Withheld Security Event Rept:On 861107,HVAC Duct, Penetrating Vital Area,Removed by Contracted Craft Workers Before Notifying Security.Cause Not Stated.Security Oversight of Subj Contract Work Intensified | 12 November 1986 | Partially Withheld Security Event Rept:On 861107,HVAC Duct, Penetrating Vital Area,Removed by Contracted Craft Workers Before Notifying Security.Cause Not Stated.Security Oversight of Subj Contract Work Intensified | |
| FVY-86-105, Part 21 Rept Re Design Defect Relating to Limitorque Motor Operators Mfg Prior to 1975.Mfg Contacted & Retrofit Kits Installed on safety-related & nonsafety-related Operators. Addl Info Encl | 10 November 1986 | Part 21 Rept Re Design Defect Relating to Limitorque Motor Operators Mfg Prior to 1975.Mfg Contacted & Retrofit Kits Installed on safety-related & nonsafety-related Operators. Addl Info Encl | |
| IA-84-930, Safety Evaluation Supporting Amends 105 & 99 to Licenses DPR-31 & DPR-41,respectively | 24 August 1984 | Safety Evaluation Supporting Amends 105 & 99 to Licenses DPR-31 & DPR-41,respectively | |
| IA-85-826, Partially Released Commission Paper Recommending NRC Response to co-owner Petition for Exemption from License Fee for Withdrawn CP Be in Form of Order.Draft Order Encl | 25 November 1985 | Partially Released Commission Paper Recommending NRC Response to co-owner Petition for Exemption from License Fee for Withdrawn CP Be in Form of Order.Draft Order Encl | |
| IA-86-299, Partially Deleted Commission Paper Informing That TMI Alert, Inc Requested Dismissal of Order Granting C Husted Hearing & to Stay Proceedings Pending Resolution of Motion to Dismiss | 7 March 1986 | Partially Deleted Commission Paper Informing That TMI Alert, Inc Requested Dismissal of Order Granting C Husted Hearing & to Stay Proceedings Pending Resolution of Motion to Dismiss | |
| IA-86-367, Partially Withheld Affirmative Adjudicatory Issue Re CBS 850324 Broadcast of 60 Minutes on Const of Shoreham | 5 December 1985 | Partially Withheld Affirmative Adjudicatory Issue Re CBS 850324 Broadcast of 60 Minutes on Const of Shoreham | |
| IA-86-683, Partially Withheld SECY-86-203 Re Aamodt Application for Reimbursement for Participation in TMI-1 Restart Proceeding. Us Court of Appeals Decision,Affirming NRC Position,Encl | 15 July 1986 | Partially Withheld SECY-86-203 Re Aamodt Application for Reimbursement for Participation in TMI-1 Restart Proceeding. Us Court of Appeals Decision,Affirming NRC Position,Encl | |
| IA-87-213, SER Finding Facility Design Acceptable W/Respect to Conformance to Reg Guide 1.97,Rev 3,except for Accumulator Tank Level & Pressure Instrumentation,Containment Sump Water Temp Instrumentation & Quench Tank Temp Instrumentation | 11 June 1986 | SER Finding Facility Design Acceptable W/Respect to Conformance to Reg Guide 1.97,Rev 3,except for Accumulator Tank Level & Pressure Instrumentation,Containment Sump Water Temp Instrumentation & Quench Tank Temp Instrumentation | Boric Acid |
| IA-87-439, Partially Withheld Secy Rept Re 861020 Order Issued by IE to Licensee to Show Cause Why Operating License Should Not Be Modified to Prohibit Use of Radios,Tapes & Other Entertainment Devices in Plant Control Rooms | 28 January 1987 | Partially Withheld Secy Rept Re 861020 Order Issued by IE to Licensee to Show Cause Why Operating License Should Not Be Modified to Prohibit Use of Radios,Tapes & Other Entertainment Devices in Plant Control Rooms |