05000206/LER-1981-010, Forwards LER 81-010/03L-0.Detailed Event Analysis Also Submitted

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Forwards LER 81-010/03L-0.Detailed Event Analysis Also Submitted
Person / Time
ML20009A231
Site:	San Onofre
Issue date:	06/25/1981
From:	Haynes J SOUTHERN CALIFORNIA EDISON CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20009A232	List: 05000206/LER-1981-010, Forwards LER 81-010/03L-0.Detailed Event Analysis Also Submitted 05000206/LER-1981-010-03, /03L-0:on 810603 & 05,inadvertent Breach of Primary Containment Occurred When Both Main Containment Personnel Airlock Doors Were Open.Caused by Three Worn Cam Followers & Misaligned Operating Shaft
References
NUDOCS 8107090280
Download: ML20009A231 (2)
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LER-1981-010, Forwards LER 81-010/03L-0.Detailed Event Analysis Also Submitted

Event date:
Report date:
2061981010R00 - NRC Website
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text

Licensee Event Report

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		Reporting criterion
05000206/LER-1981-001, Forwards LER 81-001/01T-0	Forwards LER 81-001/01T-0
05000206/LER-1981-001-01, /01T-0:on 810116,design Problem Noted Re Safeguard Load Sequencing Sys.Caused by Possible Resequencing of Safety Injection Sys Loads Due to Oscillation of Safety Injection Parameters About Setpoints	/01T-0:on 810116,design Problem Noted Re Safeguard Load Sequencing Sys.Caused by Possible Resequencing of Safety Injection Sys Loads Due to Oscillation of Safety Injection Parameters About Setpoints
05000206/LER-1981-002, Forwards LER 81-002/01T-0	Forwards LER 81-002/01T-0
05000206/LER-1981-002-01, /01T-0:on 810202,during IE Bulletin 79-14 Insp, Bolts Discovered Missing on Feedwater Line 392-10 Eg.Cause Not Stated.Bolts Will Be Replaced Prior to Return to Svc from Current Outage	/01T-0:on 810202,during IE Bulletin 79-14 Insp, Bolts Discovered Missing on Feedwater Line 392-10 Eg.Cause Not Stated.Bolts Will Be Replaced Prior to Return to Svc from Current Outage
05000206/LER-1981-003, Forwards LER 81-003/03L-0.Detailed Event Analysis Submitted	Forwards LER 81-003/03L-0.Detailed Event Analysis Submitted
05000206/LER-1981-003-03, /03L-0:on 810417,snubbers PSA-3 & 10 Could Not Be Manually Stroked in Tension or Compression Direction Per IE Bulletin 81-01.Caused by Internal Corrosion on One & Improper Installation of Other.Snubbers Returned to Mfg	/03L-0:on 810417,snubbers PSA-3 & 10 Could Not Be Manually Stroked in Tension or Compression Direction Per IE Bulletin 81-01.Caused by Internal Corrosion on One & Improper Installation of Other.Snubbers Returned to Mfg
05000206/LER-1981-004-01, /01T-0:on 810416,consultants Determined That non- Metallic Internals of Actuators,Regulators & Solenoid Valves of Recirculation Flow Control Valves 1115 D,E & F Required Replacement.Caused by Aging.Internals Being Replaced	/01T-0:on 810416,consultants Determined That non- Metallic Internals of Actuators,Regulators & Solenoid Valves of Recirculation Flow Control Valves 1115 D,E & F Required Replacement.Caused by Aging.Internals Being Replaced
05000206/LER-1981-004, Forwards LER 81-004/01T-0.Detailed Event Analysis Encl	Forwards LER 81-004/01T-0.Detailed Event Analysis Encl
05000206/LER-1981-005-04, /04L-0:on 810331,during Preparation for Annual Radiological Environ Monitoring Rept,Discovered Only One Local Crop Sampling Was Conducted During 1980.Caused by Personnel Oversight	/04L-0:on 810331,during Preparation for Annual Radiological Environ Monitoring Rept,Discovered Only One Local Crop Sampling Was Conducted During 1980.Caused by Personnel Oversight
05000206/LER-1981-005, Forwards LER 81-005/04L-0.Detailed Event Analysis Encl	Forwards LER 81-005/04L-0.Detailed Event Analysis Encl
05000206/LER-1981-006-01, /01T-0:on 810428,determined That Terminal Blocks Could Not Be Guaranteed to Function in post-accident Environ.Qualified in-line Splices in safety-related Circuits Will Be Installed on Terminal Blocks	/01T-0:on 810428,determined That Terminal Blocks Could Not Be Guaranteed to Function in post-accident Environ.Qualified in-line Splices in safety-related Circuits Will Be Installed on Terminal Blocks
05000206/LER-1981-006, Forwards LER 81-006/01T-0.Detailed Event Analysis Also Submitted	Forwards LER 81-006/01T-0.Detailed Event Analysis Also Submitted
05000206/LER-1981-007, Forwards LER 81-007/01T-0.Detailed Event Analysis Encl	Forwards LER 81-007/01T-0.Detailed Event Analysis Encl
05000206/LER-1981-007-01, /01T-0:on 810515,pump to Motor Coupling Failed During Qualification Testing of RHR Pump Motors.Caused by Corrosive Effects of Environ & Unnatural Stresses to Coupling Due to Test Setup.Couplings Will Be Replaced	/01T-0:on 810515,pump to Motor Coupling Failed During Qualification Testing of RHR Pump Motors.Caused by Corrosive Effects of Environ & Unnatural Stresses to Coupling Due to Test Setup.Couplings Will Be Replaced
05000206/LER-1981-008, Forwards LER 81-008/03X-0.Detailed Event Analysis Also Submitted	Forwards LER 81-008/03X-0.Detailed Event Analysis Also Submitted
05000206/LER-1981-008-03, /03X-0:on 810504,insp of Thermal Sleeve & Feedring Assembly on Steam Generator B Found Thermal Sleeve Deformation in Feed Nozzle Area,Radial Indications at Several Feedring Distribution Holes & Other Defects	/03X-0:on 810504,insp of Thermal Sleeve & Feedring Assembly on Steam Generator B Found Thermal Sleeve Deformation in Feed Nozzle Area,Radial Indications at Several Feedring Distribution Holes & Other Defects
05000206/LER-1981-009-01, /01T-0:on 810609,low Coolant Flow Rate & Butterfly Valve Malfunctions Occurred on Saltwater Discharge Side of Component Cooling Heat Exchanger.Caused by Impeded Valve Movement Due to Gooseneck Barnacle Growth	/01T-0:on 810609,low Coolant Flow Rate & Butterfly Valve Malfunctions Occurred on Saltwater Discharge Side of Component Cooling Heat Exchanger.Caused by Impeded Valve Movement Due to Gooseneck Barnacle Growth
05000206/LER-1981-009, Forwards LER 81-009/01T-0.Detailed Event Analysis Also Submitted	Forwards LER 81-009/01T-0.Detailed Event Analysis Also Submitted
05000206/LER-1981-010, Forwards LER 81-010/03L-0.Detailed Event Analysis Also Submitted	Forwards LER 81-010/03L-0.Detailed Event Analysis Also Submitted
05000206/LER-1981-010-03, /03L-0:on 810603 & 05,inadvertent Breach of Primary Containment Occurred When Both Main Containment Personnel Airlock Doors Were Open.Caused by Three Worn Cam Followers & Misaligned Operating Shaft	/03L-0:on 810603 & 05,inadvertent Breach of Primary Containment Occurred When Both Main Containment Personnel Airlock Doors Were Open.Caused by Three Worn Cam Followers & Misaligned Operating Shaft
05000206/LER-1981-011-04, /04T-0:on 810510,contamination Discovered in Beach Sand Adjacent to out-of-svc Yard Drainline Uncovered in Excavation.Caused by Either Runoff or Leakage from Radioactive Sys That Interface W/Drain Sys	/04T-0:on 810510,contamination Discovered in Beach Sand Adjacent to out-of-svc Yard Drainline Uncovered in Excavation.Caused by Either Runoff or Leakage from Radioactive Sys That Interface W/Drain Sys
05000206/LER-1981-011, Submits Detailed Rept as Followup to LER 81-011/04T-0 Addressing Environ Impact of Beach Contamination	Submits Detailed Rept as Followup to LER 81-011/04T-0 Addressing Environ Impact of Beach Contamination
05000206/LER-1981-012-03, /03L-0:on 810623,during Reactor Startup,Trip Bistables in Variable Low Pressure Trip Sys Were Set Low. Caused by Error in Biweekly Reactor Plant Instrumentation Test Procedure.Procedure Corrected	/03L-0:on 810623,during Reactor Startup,Trip Bistables in Variable Low Pressure Trip Sys Were Set Low. Caused by Error in Biweekly Reactor Plant Instrumentation Test Procedure.Procedure Corrected
05000206/LER-1981-012, Forwards LER 81-012/03L-0	Forwards LER 81-012/03L-0
05000206/LER-1981-013, Forwards LER 81-013/99X-0.Detailed Event Analysis Submitted	Forwards LER 81-013/99X-0.Detailed Event Analysis Submitted
05000206/LER-1981-013-99, /99X-0:on 810618,power Operated Relief Valve Controller Opened Twice During Normal Pressure Transient Following Reactor Trip.Caused by Setting Time Constant to Off to Satisfy NUREG-0737,Item II.K.3.9	/99X-0:on 810618,power Operated Relief Valve Controller Opened Twice During Normal Pressure Transient Following Reactor Trip.Caused by Setting Time Constant to Off to Satisfy NUREG-0737,Item II.K.3.9
05000206/LER-1981-014-03, /03L-0:on 810630,erroneous Feedwater Flow Indications Produced Indicated Power Levels Below Actual Levels.Caused by Feedwater Flow Orifice Installed Backwards on One Line & Excessive Vibration on Other	/03L-0:on 810630,erroneous Feedwater Flow Indications Produced Indicated Power Levels Below Actual Levels.Caused by Feedwater Flow Orifice Installed Backwards on One Line & Excessive Vibration on Other
05000206/LER-1981-014, Forwards LER 81-014/03L-0.Detailed Event Analysis Submitted	Forwards LER 81-014/03L-0.Detailed Event Analysis Submitted
05000206/LER-1981-015, Forwards LER 81-015/03L-0.Detailed Event Analysis Submitted	Forwards LER 81-015/03L-0.Detailed Event Analysis Submitted
05000206/LER-1981-015-03, /03L-0:on 810630,during Monthly Operability Test Number 2 Diesel Generator Tripped.Caused by Lube Oil Draining Through Tygon Tubing.Installation of Tubing Was Design Deficiency.Tubing Removed & Lube Oil Added to Tank	/03L-0:on 810630,during Monthly Operability Test Number 2 Diesel Generator Tripped.Caused by Lube Oil Draining Through Tygon Tubing.Installation of Tubing Was Design Deficiency.Tubing Removed & Lube Oil Added to Tank
05000206/LER-1981-016-01, /01T-0:on 810711,immediately Following Unit Shutdown,Both Personnel Airlock Doors Were Simultaneously Open 12 Minutes.Caused by Misaligned Locking Mechanism Due to Damaged Cam Followers.Damaged or Worn Parts Replaced	/01T-0:on 810711,immediately Following Unit Shutdown,Both Personnel Airlock Doors Were Simultaneously Open 12 Minutes.Caused by Misaligned Locking Mechanism Due to Damaged Cam Followers.Damaged or Worn Parts Replaced
05000206/LER-1981-016, Forwards LER 81-016/01T-0.Detailed Event Analysis Submitted	Forwards LER 81-016/01T-0.Detailed Event Analysis Submitted
05000206/LER-1981-017, Forwards LER 81-017/03L-0.Detailed Event Analysis Submitted	Forwards LER 81-017/03L-0.Detailed Event Analysis Submitted
05000206/LER-1981-017-03, /03L-0:on 810714,lube Oil Spraying from Cracked Instrument Line Ignited by Hot Exhaust Piping Above Diesel Engine.Caused by Instrument Line Cracking Due to Postulated Fatigue Failure Due to Vibrating Pressure Gauge	/03L-0:on 810714,lube Oil Spraying from Cracked Instrument Line Ignited by Hot Exhaust Piping Above Diesel Engine.Caused by Instrument Line Cracking Due to Postulated Fatigue Failure Due to Vibrating Pressure Gauge
05000206/LER-1981-018-01, /01T-0:on 810717,hydrogen-air Mixture Ignited in North Radwaste Gas Decay Tank Resulting in Manway Damage & Gaseous Release.Caused by check-valve Back Leakage of Volatile Gas Mix at Dinitrogen Instrument Air Interface	/01T-0:on 810717,hydrogen-air Mixture Ignited in North Radwaste Gas Decay Tank Resulting in Manway Damage & Gaseous Release.Caused by check-valve Back Leakage of Volatile Gas Mix at Dinitrogen Instrument Air Interface
05000206/LER-1981-018, Forwards LER 81-018/01T-0.Detailed Event Analysis Submitted	Forwards LER 81-018/01T-0.Detailed Event Analysis Submitted
05000206/LER-1981-019-03, /03L-0:on 810816 & 25,seal Water Line to North Charging Pump Outboard Seal Found Leaking in Excess of Tech Spec Limits.Caused by Svc Induced Wear on Threaded Joint of Seal Water Line.Joint Tightened	/03L-0:on 810816 & 25,seal Water Line to North Charging Pump Outboard Seal Found Leaking in Excess of Tech Spec Limits.Caused by Svc Induced Wear on Threaded Joint of Seal Water Line.Joint Tightened
05000206/LER-1981-019, Forwards LER 81-019/03L-0.Detailed Event Analysis Submitted	Forwards LER 81-019/03L-0.Detailed Event Analysis Submitted
05000206/LER-1981-020-01, /01T-0:on 810903,following Manual Reactor Trip, Two Safety Injection Valves HV 851 Failed to Open Upon Valid Safety Injection Sys Signal.Caused by Inadequate as-built Design.Design Changes Being Considered	/01T-0:on 810903,following Manual Reactor Trip, Two Safety Injection Valves HV 851 Failed to Open Upon Valid Safety Injection Sys Signal.Caused by Inadequate as-built Design.Design Changes Being Considered
05000206/LER-1981-021-01, /01T-0:on 810903,feedwater & Steam Generator Level Control Was Erratic.Caused by Twinco Voltage Regulator Filter Choke 1 Failure to Ground W/Resulting Degradation of 115-volt Ac Power.Regulator Repaired	/01T-0:on 810903,feedwater & Steam Generator Level Control Was Erratic.Caused by Twinco Voltage Regulator Filter Choke 1 Failure to Ground W/Resulting Degradation of 115-volt Ac Power.Regulator Repaired
05000206/LER-1981-022, Forwards LER 81-022/03L-0.Detailed Event Analysis Also Submitted	Forwards LER 81-022/03L-0.Detailed Event Analysis Also Submitted
05000206/LER-1981-022-03, /03L-0:on 811003,during Performance of Visual Surveillance Insp of Hydraulic Snubbers Installed on safety- Related Sys,Hydraulic Fluid Reservoir in One Snubber Found Empty.Caused by Failed Reservoir Seal Gasket	/03L-0:on 811003,during Performance of Visual Surveillance Insp of Hydraulic Snubbers Installed on safety- Related Sys,Hydraulic Fluid Reservoir in One Snubber Found Empty.Caused by Failed Reservoir Seal Gasket
05000206/LER-1981-023, /00X-0:on 810925,loss of Power to Train a of Containment Spray Actuation Sys Caused Max of 400 Gallons of Borated Water to Be Sprayed Inside Containment.Caused by Blown Fuse Combined W/Inadvertent Breaker Tripping	/00X-0:on 810925,loss of Power to Train a of Containment Spray Actuation Sys Caused Max of 400 Gallons of Borated Water to Be Sprayed Inside Containment.Caused by Blown Fuse Combined W/Inadvertent Breaker Tripping
05000206/LER-1981-024-01, /01T-0:on 811025,two Containment Isolation Valves CV-526 & CV-528 Did Not Immediately Operate on Demand.On 811013,isolation Valve CV-516 Did Not Immediately Operate. Caused by Blocking Lever Not Dropping Sufficiently	/01T-0:on 811025,two Containment Isolation Valves CV-526 & CV-528 Did Not Immediately Operate on Demand.On 811013,isolation Valve CV-516 Did Not Immediately Operate. Caused by Blocking Lever Not Dropping Sufficiently
05000206/LER-1981-024, Submits Followup to LER 81-024 Re Failure of Energy Products Group Ball Valves W/Efcomatic Actuators to Trip Initially Per Commitment Made in Design Change 78-34.Actuators Will Be Replaced W/Different Design	Submits Followup to LER 81-024 Re Failure of Energy Products Group Ball Valves W/Efcomatic Actuators to Trip Initially Per Commitment Made in Design Change 78-34.Actuators Will Be Replaced W/Different Design
05000206/LER-1981-025, Forwards LER 81-025/01X-1.Detailed Event Analysis Submitted	Forwards LER 81-025/01X-1.Detailed Event Analysis Submitted
05000206/LER-1981-025-01, /01T-0:on 811025,ball Valve CV-534 Did Not Close Automatically on Initiation of Containment Isolation Signal.On 811101,containment Isolation Valve CV-102 Did Not Close.Caused by Sticking Relays in Closing Circuits	/01T-0:on 811025,ball Valve CV-534 Did Not Close Automatically on Initiation of Containment Isolation Signal.On 811101,containment Isolation Valve CV-102 Did Not Close.Caused by Sticking Relays in Closing Circuits
05000206/LER-1981-026-01, /01T-0:on 811102 Vol of Water in Refueling Water Storage Tank Fell Below Tech Spec When recirculation-to- Condenser Valve Water CV-36 Failed to Close,Allowing 15,000 Gallons of Refueling to Be Pumped Into Condenser	/01T-0:on 811102 Vol of Water in Refueling Water Storage Tank Fell Below Tech Spec When recirculation-to- Condenser Valve Water CV-36 Failed to Close,Allowing 15,000 Gallons of Refueling to Be Pumped Into Condenser
05000206/LER-1981-026, Forwards LER 81-026/01T-0.Detailed Event Analysis Submitted	Forwards LER 81-026/01T-0.Detailed Event Analysis Submitted
05000206/LER-1981-027, Forwards LER 81-027/01T-0.Detailed Event Analysis Submitted	Forwards LER 81-027/01T-0.Detailed Event Analysis Submitted
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