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| 05000499/LER-1997-001-01, :on 970205,main Steam Safety Valve Setpoints Discovered Outside Required Tolerance Occurred.Caused by MSSV Above & Beyond Previously Documented Setpoint Drift. Lift Setting of Five MSSV Were Adjusted |
- on 970205,main Steam Safety Valve Setpoints Discovered Outside Required Tolerance Occurred.Caused by MSSV Above & Beyond Previously Documented Setpoint Drift. Lift Setting of Five MSSV Were Adjusted
| 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.73(a)(2)(viii) |
| 05000498/LER-1997-002, :on 970115,safety Injection Sys Logic Circuitry Not Fully Tested by Surveillance Procedures.Caused by Unusual Logic Arrangement.Containment Sump Isolation Valves Have Been Tested |
- on 970115,safety Injection Sys Logic Circuitry Not Fully Tested by Surveillance Procedures.Caused by Unusual Logic Arrangement.Containment Sump Isolation Valves Have Been Tested
| |
| 05000499/LER-1997-002, Forwards LER 97-002-00,for Hlp Re All Four Steam Generators Being Classified Category C-3 | Forwards LER 97-002-00,for Hlp Re All Four Steam Generators Being Classified Category C-3 | |
| 05000499/LER-1997-002-01, :on 970215,Steam Generators 2A Eddy Current Insp Results Fell Into Category C-3.Caused by Stress Corrosion Cracking at tube-to-tube Support Plate.Sg Tubes Were Plugged in Four Unit 2 Steam Generators |
- on 970215,Steam Generators 2A Eddy Current Insp Results Fell Into Category C-3.Caused by Stress Corrosion Cracking at tube-to-tube Support Plate.Sg Tubes Were Plugged in Four Unit 2 Steam Generators
| 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.73(a)(2)(viii) 10 CFR 50.73(a)(2) |
| 05000499/LER-1997-003, :on 970224,TS SR 4.5.2 Was Not Met When Loose Debris Was Discovered in Reactor Containment Bldg.Caused by Failure to Communicate Mgts Expectation.Loose Debris Was Removed |
- on 970224,TS SR 4.5.2 Was Not Met When Loose Debris Was Discovered in Reactor Containment Bldg.Caused by Failure to Communicate Mgts Expectation.Loose Debris Was Removed
| 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications |
| 05000498/LER-1997-003, :on 970123,potential for Overpressurization of Piping Identified.Caused by Deficiency in Original Design. Thermal Insulation Installed on Lines 3WL-1009 & 3WL-2009 & Lines Have Been Returned to Service |
- on 970123,potential for Overpressurization of Piping Identified.Caused by Deficiency in Original Design. Thermal Insulation Installed on Lines 3WL-1009 & 3WL-2009 & Lines Have Been Returned to Service
| 10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.72(b)(3)(ii), Degraded or Unanalyzed Condition 10 CFR 50.73(a)(2) |
| 05000499/LER-1997-003-01, Forwards LER 97-003-01,failure to Meet Requirements of TS 4.5.2.c Re Surveillance Insp of Containment for Loose Debris | Forwards LER 97-003-01,failure to Meet Requirements of TS 4.5.2.c Re Surveillance Insp of Containment for Loose Debris | |
| 05000499/LER-1997-004-01, :on 970319,unit Trip Occurred While Performing Main Turbine Testing Due to Intermittent Failure of Inverter Power Supply for Channel Two Automatic Stop Trip Valve. Inverter Power Supply Was Replaced |
- on 970319,unit Trip Occurred While Performing Main Turbine Testing Due to Intermittent Failure of Inverter Power Supply for Channel Two Automatic Stop Trip Valve. Inverter Power Supply Was Replaced
| 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.73(a)(2)(viii) |
| 05000498/LER-1997-004, :on 970319,failed to Fully Test 4160 Volt Bus Undervoltage Logic Circuitry by Surveillance Procedures. Caused by Not Recognizing That Failure in One Actuation Scheme.Affected Logic Circuitry Was Tested |
- on 970319,failed to Fully Test 4160 Volt Bus Undervoltage Logic Circuitry by Surveillance Procedures. Caused by Not Recognizing That Failure in One Actuation Scheme.Affected Logic Circuitry Was Tested
| 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications |
| 05000498/LER-1997-005-01, :on 970402,main Steam Safety Valve Setpoints Were Discovered Outside Required Tolerance Due to Alteration of Nozzle Seat & Disc Seat Oxide Layers.Lift Settings Were Adjusted to Required Allowable Tolerances |
- on 970402,main Steam Safety Valve Setpoints Were Discovered Outside Required Tolerance Due to Alteration of Nozzle Seat & Disc Seat Oxide Layers.Lift Settings Were Adjusted to Required Allowable Tolerances
| 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(x) 10 CFR 50.72(b)(3)(ii), Degraded or Unanalyzed Condition 10 CFR 50.73(a)(2) |
| 05000499/LER-1997-005, :on 970326,manual Unit Trip Occurred Due to Lowering SG Level.Failed seal-in Relay Was Replaced & Verified That Other seal-in Relays Affecting MFRVs in Both Units 1 & 2 Had Proper Coil Resistances |
- on 970326,manual Unit Trip Occurred Due to Lowering SG Level.Failed seal-in Relay Was Replaced & Verified That Other seal-in Relays Affecting MFRVs in Both Units 1 & 2 Had Proper Coil Resistances
| 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.73(a)(2)(viii) 10 CFR 50.73(a)(2) |
| 05000498/LER-1997-006, :on 970507,inappropriate Surveillance Procedure Monitoring Parameters Were Noted.Caused by Inadequate Review of Changes Made to TS & Bases.Evaluated Review Processes for TS Changes W/Focus on Changes to Bases |
- on 970507,inappropriate Surveillance Procedure Monitoring Parameters Were Noted.Caused by Inadequate Review of Changes Made to TS & Bases.Evaluated Review Processes for TS Changes W/Focus on Changes to Bases
| 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.72(b)(3)(ii), Degraded or Unanalyzed Condition 10 CFR 50.73(a)(2) |
| 05000499/LER-1997-006, :on 970430,manual Reactor Trip Occurred.Caused by Malfunctioning Main Feedwater Regulating Valve.Main 2D Feedwater Regulating Valve controller-driver Card Replaced & Control Circuit Tested Satisfactorily |
- on 970430,manual Reactor Trip Occurred.Caused by Malfunctioning Main Feedwater Regulating Valve.Main 2D Feedwater Regulating Valve controller-driver Card Replaced & Control Circuit Tested Satisfactorily
| 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.73(a)(2)(viii) 10 CFR 50.73(a)(2) |
| 05000498/LER-1997-007, :on 970619,ESFAS Pressurizer Pressure Sys Interlock Was Not Fully Tested by Surveillance Procedures. Caused by Failure to Recognize That Circuitry Did Not Include Required Provisions.Revised Sps |
- on 970619,ESFAS Pressurizer Pressure Sys Interlock Was Not Fully Tested by Surveillance Procedures. Caused by Failure to Recognize That Circuitry Did Not Include Required Provisions.Revised Sps
| 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2) |
| 05000499/LER-1997-007, Forwards LER 97-007-00,for Stp,Unit 2 Re Manual Reactor Trip Due to Loss of Inventory in SG 2D.Commitments Listed | Forwards LER 97-007-00,for Stp,Unit 2 Re Manual Reactor Trip Due to Loss of Inventory in SG 2D.Commitments Listed | |
| 05000499/LER-1997-007-01, :on 971121,manual Reactor Trip Occurred.Caused by Two Separate Failure Mechanisms That Combined to Result in Loss of Power to Cabinet.Failed Voltage to Pulse Converter Circuit Card Was Replaced |
- on 971121,manual Reactor Trip Occurred.Caused by Two Separate Failure Mechanisms That Combined to Result in Loss of Power to Cabinet.Failed Voltage to Pulse Converter Circuit Card Was Replaced
| 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.73(a)(2)(viii) 10 CFR 50.73(a)(2) |
| 05000498/LER-1997-008, :on 970811,ESF Containment Spray Actuation Relays Slave Relay Test Were Not Fully Tested by Surveillance.Caused by Failure to Understand Expectations Re Documentation.Spray Pumps Verified Operable |
- on 970811,ESF Containment Spray Actuation Relays Slave Relay Test Were Not Fully Tested by Surveillance.Caused by Failure to Understand Expectations Re Documentation.Spray Pumps Verified Operable
| 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2) |
| 05000498/LER-1997-009-02, Forwards LER 97-009-02 Re MSSV Setpoints Found Outside Required Tolerances.Commitments Made in Original Licensee Event Rept Revised as Indicated in Corrective Action Section of Attachment to Ltr | Forwards LER 97-009-02 Re MSSV Setpoints Found Outside Required Tolerances.Commitments Made in Original Licensee Event Rept Revised as Indicated in Corrective Action Section of Attachment to Ltr | |
| 05000498/LER-1997-009, :on 970902,MSSVs 7430A & 7430B Found W/Lift Settings Outside TS Allowable Tolerance as Listed.Caused by Alteration of Nozzle & Disc Oxide Layers.Lift Setting of out-of-tolerance Valves Will Be Adjusted |
- on 970902,MSSVs 7430A & 7430B Found W/Lift Settings Outside TS Allowable Tolerance as Listed.Caused by Alteration of Nozzle & Disc Oxide Layers.Lift Setting of out-of-tolerance Valves Will Be Adjusted
| 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(x) 10 CFR 50.72(b)(3)(ii), Degraded or Unanalyzed Condition 10 CFR 50.73(a)(2) |
| 05000498/LER-1997-010, :on 970920,discovered That MSSV Was Not Meeting Required Relief Capacity.Caused by Inadequate Resolution of Issues Re Valve Assembly During Unit 1 Sixth Refueling Outage.Revised MSSV Reassembly Procedure |
- on 970920,discovered That MSSV Was Not Meeting Required Relief Capacity.Caused by Inadequate Resolution of Issues Re Valve Assembly During Unit 1 Sixth Refueling Outage.Revised MSSV Reassembly Procedure
| 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.72(b)(3)(ii), Degraded or Unanalyzed Condition 10 CFR 50.73(a)(2)(viii) 10 CFR 50.73(a)(2) |
| 05000498/LER-1997-010-01, Forwards LER 97-010-01 Re Discovery of MSSVs Not Meeting Required Relief Capacity.Event Did Not Have Adverse Effect on Health & Safety of Public.Corrective Actions Listed in Attachment to Ltr Are Only Licensing Commitments i | Forwards LER 97-010-01 Re Discovery of MSSVs Not Meeting Required Relief Capacity.Event Did Not Have Adverse Effect on Health & Safety of Public.Corrective Actions Listed in Attachment to Ltr Are Only Licensing Commitments in Rept | |
| 05000498/LER-1997-012, :on 971110,reactor Trip Occurred Due to Overtemperature/Delta Temperature Actuation.Caused by Momentary Energization of Overspeed Protection Control Solenoid.Failed Solid State Relay in Circuitry Was Removed |
- on 971110,reactor Trip Occurred Due to Overtemperature/Delta Temperature Actuation.Caused by Momentary Energization of Overspeed Protection Control Solenoid.Failed Solid State Relay in Circuitry Was Removed
| 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2) |
| 05000498/LER-1997-013-01, Forwards LER 97-013-01,re Failure to Meet TS Leak Rate Requirements for Supplementary Containment Purge Supply Isolation Valve | Forwards LER 97-013-01,re Failure to Meet TS Leak Rate Requirements for Supplementary Containment Purge Supply Isolation Valve | |