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| 05000255/LER-1986-001, :on 860106,investigation Initiated Re Us Ecology Hanford Reservation Receipt of Radwaste Shipment 85-054-S.Shipment Received & Buried on 851230 W/O Written Ack.Written Ack Received on 860113 |
- on 860106,investigation Initiated Re Us Ecology Hanford Reservation Receipt of Radwaste Shipment 85-054-S.Shipment Received & Buried on 851230 W/O Written Ack.Written Ack Received on 860113
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| 05000255/LER-1986-002, :on 860102,discovered That Missile Shield Lift Device Outside Safety Working Load Requirement.No Cause Found.Lifting Device Can Be Used Until New Lifting Device Obtained |
- on 860102,discovered That Missile Shield Lift Device Outside Safety Working Load Requirement.No Cause Found.Lifting Device Can Be Used Until New Lifting Device Obtained
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| 05000255/LER-1986-003, :on 860106,discovered Undocumented Jumper Wire in EEQ-listed Limitorque motor-operated Valve Operators. Caused by pre-1970 Installation of Wire.Wires Replaced.W/ |
- on 860106,discovered Undocumented Jumper Wire in EEQ-listed Limitorque motor-operated Valve Operators. Caused by pre-1970 Installation of Wire.Wires Replaced.W/
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| 05000255/LER-1986-004-01, Forwards LER 86-004-01 Re Failure of Main Steam Safety Relief Valves to Meet as Found Acceptance Criteria | Forwards LER 86-004-01 Re Failure of Main Steam Safety Relief Valves to Meet as Found Acceptance Criteria | 10 CFR 50.73(a)(2)(1) |
| 05000000/LER-1986-005-03, Informs of Planned Site Visit to Obtain Info Supporting Implementation of Emergency Response Data Sys,Including Availability of PWR or BWR Parameters in Digital Form & Characterization of Available Data Feed Points | Informs of Planned Site Visit to Obtain Info Supporting Implementation of Emergency Response Data Sys,Including Availability of PWR or BWR Parameters in Digital Form & Characterization of Available Data Feed Points | |
| 05000255/LER-1986-005, :on 860109,review of Auxiliary Feedwater Sys Flow Requirements Revealed Discrepancy Between Known Flow & Flow Requirements.Caused by Misrepresentation of Existing FSAR Design Basis Flow.Fsar Revised |
- on 860109,review of Auxiliary Feedwater Sys Flow Requirements Revealed Discrepancy Between Known Flow & Flow Requirements.Caused by Misrepresentation of Existing FSAR Design Basis Flow.Fsar Revised
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| 05000255/LER-1986-006, :on 860125,power to 2,400-volt Bus 1C Lost During Transfer Attempt Between Station Power Breakers. Caused by Failure of Personnel to Recognize That Breaker Receiving Power Transfer in Test Position |
- on 860125,power to 2,400-volt Bus 1C Lost During Transfer Attempt Between Station Power Breakers. Caused by Failure of Personnel to Recognize That Breaker Receiving Power Transfer in Test Position
| 10 CFR 50.73(a)(2)(iv), System Actuation |
| 05000255/LER-1986-007, :on 860125,wrong Connector Pulled on Pressure Indicator Resulting in Loss of Safety Injection Block Signal & Initiation of Safety Injection Signal.Caused by Personnel Error.Affected Personnel Counseled |
- on 860125,wrong Connector Pulled on Pressure Indicator Resulting in Loss of Safety Injection Block Signal & Initiation of Safety Injection Signal.Caused by Personnel Error.Affected Personnel Counseled
| 10 CFR 50.73(a)(2)(iv), System Actuation |
| 05000255/LER-1986-008, :on 860126,during Unit Shutdown Regular Trip & Containment Isolation Occurred.Caused by Tripping Output Breaker on Preferred Ac Bus Y30.Event Reviewed W/Personnel |
- on 860126,during Unit Shutdown Regular Trip & Containment Isolation Occurred.Caused by Tripping Output Breaker on Preferred Ac Bus Y30.Event Reviewed W/Personnel
| 10 CFR 50.73(a)(2) |
| 05000255/LER-1986-009, :on 860106 & 08,watertight Fire Doors to safety-related Equipment Rooms Found Open.Caused by Personnel Failure to Follow Requirements for Fire Doors. Personnel Counseled |
- on 860106 & 08,watertight Fire Doors to safety-related Equipment Rooms Found Open.Caused by Personnel Failure to Follow Requirements for Fire Doors. Personnel Counseled
| 10 CFR 50.73(a)(2)(i) |
| 05000255/LER-1986-010, :on 860209,pipe Support Discovered Missing from Integrated Leak Rate Test Instrument Line.Cause Assumed to Be Removal of Hanger During Removal of Integrated Leak Rate Test Instrumentation Panel in 1981 |
- on 860209,pipe Support Discovered Missing from Integrated Leak Rate Test Instrument Line.Cause Assumed to Be Removal of Hanger During Removal of Integrated Leak Rate Test Instrumentation Panel in 1981
| 10 CFR 50.72(b)(3)(ii), Degraded or Unanalyzed Condition |
| 05000255/LER-1986-012, :on 860221,vol of Oil in Fuel Oil Storage Tank Reduced Below Tech Specs.Vendor Truck Arrived & Departed W/O Delivery Due to Adverse Road Conditions.Alternate Delivery Made.Security & Vendor Notified |
- on 860221,vol of Oil in Fuel Oil Storage Tank Reduced Below Tech Specs.Vendor Truck Arrived & Departed W/O Delivery Due to Adverse Road Conditions.Alternate Delivery Made.Security & Vendor Notified
| 10 CFR 50.73(a)(2)(1) |
| 05000255/LER-1986-013, :on 860225,reactor Protection Sys Actuation Occurred from Spike in Nuclear Instrument Channel.Caused by Reenergization of Preferred Ac Bus During Manual Transfer. Procedural Controls Instituted |
- on 860225,reactor Protection Sys Actuation Occurred from Spike in Nuclear Instrument Channel.Caused by Reenergization of Preferred Ac Bus During Manual Transfer. Procedural Controls Instituted
| 10 CFR 50.73(a)(2)(iv), System Actuation |
| 05000255/LER-1986-014, :on 860227,automatic Start of Both Emergency Diesel Generators Occurred.Caused by Personnel Error During Maint on auto-stop Oil Sys.Repair Group & Responsible Engineer Will Be Counseled on Occurrence |
- on 860227,automatic Start of Both Emergency Diesel Generators Occurred.Caused by Personnel Error During Maint on auto-stop Oil Sys.Repair Group & Responsible Engineer Will Be Counseled on Occurrence
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| 05000255/LER-1986-015-01, :on 860326,turbine Generator Trip Occurred, Resulting in Reactor Trip Due to Loss of Load.Cause Not Determined.Evaluation Continuing |
- on 860326,turbine Generator Trip Occurred, Resulting in Reactor Trip Due to Loss of Load.Cause Not Determined.Evaluation Continuing
| 10 CFR 50.73(a)(2)(iv), System Actuation |
| 05000255/LER-1986-016, :on 860310,LPSI Pump P-67B Inadvertently Started.Caused by Closing Corresponding Pair of Contacts on DBA Sequencer During Cleaning Procedure.New Tool Used During Cleaning.Incident Discussed W/Personnel |
- on 860310,LPSI Pump P-67B Inadvertently Started.Caused by Closing Corresponding Pair of Contacts on DBA Sequencer During Cleaning Procedure.New Tool Used During Cleaning.Incident Discussed W/Personnel
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| 05000255/LER-1986-016-01, :on 860310,LPSI Pump Inadvertently Started. Caused by Closure at Corresponding Pair of Contacts on DBA Sequencer During Cleaning.Precautionary Note Added to Contact Closure Maint Procedure |
- on 860310,LPSI Pump Inadvertently Started. Caused by Closure at Corresponding Pair of Contacts on DBA Sequencer During Cleaning.Precautionary Note Added to Contact Closure Maint Procedure
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| 05000255/LER-1986-017, :on 860410,excess Primary Coolant Leakage Detected.Plant Placed in Hot Shutdown.Caused by Failure of Valves RV-2006,PRV-1067,-1068 & -1072 to Seat Fully.Valves Repaired & Reseated |
- on 860410,excess Primary Coolant Leakage Detected.Plant Placed in Hot Shutdown.Caused by Failure of Valves RV-2006,PRV-1067,-1068 & -1072 to Seat Fully.Valves Repaired & Reseated
| 10 CFR 50.73(a)(2)(1) |
| 05000255/LER-1986-018, :on 860519,automatic Reactor Trip Occurred Due to High Pressurizer Pressure.Caused by Power Supply Failure in Turbine electro-hydraulic Control Sys Due to Ac Line Noise.Wiring Rerouted.Power Supply Shielded |
- on 860519,automatic Reactor Trip Occurred Due to High Pressurizer Pressure.Caused by Power Supply Failure in Turbine electro-hydraulic Control Sys Due to Ac Line Noise.Wiring Rerouted.Power Supply Shielded
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| 05000255/LER-1986-021, :on 860624,technicians Discovered Power Supply to Containment Floor Water Level Instruments Deenergized, Rendering Instruments Inoperable.Caused by Inadequate Calibr Procedure.Procedure Will Be Revised |
- on 860624,technicians Discovered Power Supply to Containment Floor Water Level Instruments Deenergized, Rendering Instruments Inoperable.Caused by Inadequate Calibr Procedure.Procedure Will Be Revised
| 10 CFR 50.73(a)(2)(1) |
| 05000255/LER-1986-023, :on 860724,design Problem Discovered Re Actuating Mechanism for Equalizing Valves on Containment Bldg Escape Airlock.Caused by Error in Actuating Cams Design.Cams Modified |
- on 860724,design Problem Discovered Re Actuating Mechanism for Equalizing Valves on Containment Bldg Escape Airlock.Caused by Error in Actuating Cams Design.Cams Modified
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| 05000255/LER-1986-024, :on 860804,during Cold Shutdown,Discovered Insufficient Svc Water Flow Through Containment Air Coolers. Caused by Improper Adjustment of Valve Actuators.Actuators Adjusted to Facilitate Proper Operation |
- on 860804,during Cold Shutdown,Discovered Insufficient Svc Water Flow Through Containment Air Coolers. Caused by Improper Adjustment of Valve Actuators.Actuators Adjusted to Facilitate Proper Operation
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| 05000255/LER-1986-025, :on 860815,during Shutdown,Review Determined That Three Charging Pumps of Boric Acid Injection Flow Path Inoperable.Caused by Tech Spec Misinterpretation by Operators.Pump Declared Operable |
- on 860815,during Shutdown,Review Determined That Three Charging Pumps of Boric Acid Injection Flow Path Inoperable.Caused by Tech Spec Misinterpretation by Operators.Pump Declared Operable
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| 05000255/LER-1986-026, :on 860815,inadvertent Emergency Diesel Generator Actuation Occurred Due to Open Link in Circuitry. Caused by Personnel Error.Work Group Advised to Pay Attention to Detail |
- on 860815,inadvertent Emergency Diesel Generator Actuation Occurred Due to Open Link in Circuitry. Caused by Personnel Error.Work Group Advised to Pay Attention to Detail
| 10 CFR 50.73(a)(2)(iv), System Actuation |
| 05000255/LER-1986-027, :on 860823,inadvertent Emergency Diesel Generator Actuation Occurred.Caused by Error in Written Work Instructions Provided to Operators.Necessity for Close Attention to Detail Emphasized |
- on 860823,inadvertent Emergency Diesel Generator Actuation Occurred.Caused by Error in Written Work Instructions Provided to Operators.Necessity for Close Attention to Detail Emphasized
| 10 CFR 50.73(a)(2)(iv), System Actuation |
| 05000255/LER-1986-028, :on 860826,automatic Emergency Diesel Generator Actuation Occurred.Caused by Lightning Strike.Potential Transformer Fuses Replaced & Buses 1-D & 1-E (EA) Repowered W/Normal Offsite Power |
- on 860826,automatic Emergency Diesel Generator Actuation Occurred.Caused by Lightning Strike.Potential Transformer Fuses Replaced & Buses 1-D & 1-E (EA) Repowered W/Normal Offsite Power
| 10 CFR 50.73(a)(2)(iv), System Actuation |
| 05000255/LER-1986-029, :on 860827,inadvertent Automatic Actuation of Emergency Diesel Generators Occurred.Caused by Improper Removal of Link.Evolution for Bypassing Emergency Diesel Generator Automatic Start Proceduralized |
- on 860827,inadvertent Automatic Actuation of Emergency Diesel Generators Occurred.Caused by Improper Removal of Link.Evolution for Bypassing Emergency Diesel Generator Automatic Start Proceduralized
| 10 CFR 50.73(a)(2)(iv), System Actuation |
| 05000255/LER-1986-030, :on 860818,inadvertent Right Channel Safety Injection Signal Occurred During Test of Plant Mod.Caused by Inadequate Procedure & Personnel Error.Administrative Procedure Revised & Personnel Counseled |
- on 860818,inadvertent Right Channel Safety Injection Signal Occurred During Test of Plant Mod.Caused by Inadequate Procedure & Personnel Error.Administrative Procedure Revised & Personnel Counseled
| 10 CFR 50.73(a)(2)(iv), System Actuation |
| 05000255/LER-1986-031, :on 860821,excessive Vibration Resulting in Failure of Containment Air Cooler Sys Occurred.Apparently Caused by Deterioration of Fan Motor Bearings.Bearing Replacement Planned to Restore Fan Motors |
- on 860821,excessive Vibration Resulting in Failure of Containment Air Cooler Sys Occurred.Apparently Caused by Deterioration of Fan Motor Bearings.Bearing Replacement Planned to Restore Fan Motors
| 10 CFR 50.73(a)(2) |
| 05000255/LER-1986-032-01, Discusses Inability to Perform Commitment to Inspect Component Cooling Water Heat Exchanger,Per LER 86-032-01 | Discusses Inability to Perform Commitment to Inspect Component Cooling Water Heat Exchanger,Per LER 86-032-01 | |
| 05000255/LER-1986-032, :on 860825,testing Disclosed Component Cooling Water (CCW) Flow to HX Less than Values Specified in Fsar. Caused by Underdesigned Ccwhxs Which Serve to Limit Flow to Components Downstream.Analysis Underway |
- on 860825,testing Disclosed Component Cooling Water (CCW) Flow to HX Less than Values Specified in Fsar. Caused by Underdesigned Ccwhxs Which Serve to Limit Flow to Components Downstream.Analysis Underway
| 10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition |
| 05000255/LER-1986-033, :on 860825,discovered That LPSI Pump P-67B Flow Did Not Meet FSAR Specs.Caused by Impeller Installed in Pump in 1983.Impeller Replaced.Performance Tests Indicate That Pump Now Satisfies FSAR Specs |
- on 860825,discovered That LPSI Pump P-67B Flow Did Not Meet FSAR Specs.Caused by Impeller Installed in Pump in 1983.Impeller Replaced.Performance Tests Indicate That Pump Now Satisfies FSAR Specs
| 10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition |
| 05000255/LER-1986-034, :on 860826,design Deficiency Noted Re Postulated Bus Failure Resulting in Inoperable Electronic Switching Sys.Design Error Corrected Prior to start-up by Modifying Recirculation Actuation Sys |
- on 860826,design Deficiency Noted Re Postulated Bus Failure Resulting in Inoperable Electronic Switching Sys.Design Error Corrected Prior to start-up by Modifying Recirculation Actuation Sys
| 10 CFR 50.72(b)(3)(ii), Degraded or Unanalyzed Condition |
| 05000255/LER-1986-035, :on 860830,discovered That Containment Purge Supply Isolation Valves CV-1813 & CV-1814 Not Truly in Electrically Locked Closed Condition.Caused by Circuitry Design Feature.Sys Modified |
- on 860830,discovered That Containment Purge Supply Isolation Valves CV-1813 & CV-1814 Not Truly in Electrically Locked Closed Condition.Caused by Circuitry Design Feature.Sys Modified
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| 05000255/LER-1986-036, :on 860930,discovered That Svc Water Sys Pumps Incapable of Meeting Flow/Head Values of 8,000 Gpm Per Fsar. Caused by Installation of Incorrect Pump Impellers.Periodic Testing Will Be Implemented |
- on 860930,discovered That Svc Water Sys Pumps Incapable of Meeting Flow/Head Values of 8,000 Gpm Per Fsar. Caused by Installation of Incorrect Pump Impellers.Periodic Testing Will Be Implemented
| 10 CFR 50.73(a)(2)(1) |
| 05000255/LER-1986-037, :on 861022,QA Audit Determined That Compliance W/Tech Specs for high-range Noble Gas Monitor Not Possible Since Monitor Does Not Physically Contain Specified Functions.Tech Specs Will Be Clarified |
- on 861022,QA Audit Determined That Compliance W/Tech Specs for high-range Noble Gas Monitor Not Possible Since Monitor Does Not Physically Contain Specified Functions.Tech Specs Will Be Clarified
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| 05000255/LER-1986-038, :on 861108,while in Cold Shutdown,Radioactive Liquid Effluent Release Occurred.Caused by Shift Supervisor Error.Shift Supervisors Counseled |
- on 861108,while in Cold Shutdown,Radioactive Liquid Effluent Release Occurred.Caused by Shift Supervisor Error.Shift Supervisors Counseled
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