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{{#ask: [[Category:ABNORMAL OCCURRENCE REPORTS (SEE ALSO LER & RO)]] [[Site::Oyster Creek||05000000]]
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{
    "query_string": "[[Category:ABNORMAL OCCURRENCE REPORTS (SEE ALSO LER &amp; RO)]] [[Site::Oyster Creek||05000000]]",
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    "query_time": "0.3789",
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}

	Issue date	Title	Topic
ML20084U956	23 December 1974	Telecopy Ao:Three Weld Abnormalities Discovered on Welds in Bypass Piping Lines Around Recirculation Pump Discharge Valves.Plans Formulated to Replace Lines
ML20085E955	9 July 1975	AO BFAO-50-260/759T:on 750709,broken Stem Found on second- Stage Pilot of Main Steam Release Valve 1.Break Point Just Under Lock Nut Above Actuating Piston.Site Inspector Advised
ML20085G186	24 October 1973	Ao:On 730925,trip Setpoint of 152 Inches for HPCI Flow Switch DPIS 3-2353 Exceeded Tech Spec Limit.Caused by Locking Device Failing to Control Setpoint Drift.Switch Setpoint Changed & Calibr Frequency Increased
ML20085G188	26 October 1973	AO BFAO-7327W:on 731016,setpoint of 1.8 Psid for Recirculation Jet Pump Riser Differential Pressure Switch PdIS-68-24 Exceeded Tech Spec Limit.Switch Recalibr,Tested & Frequency Increased to Once Every 2 Wks
ML20085G823	18 September 1973	AO BFAO-739W:on 730908,fuse Blew in Power Supplying HPCI Inverter Power Supply.Caused by Generic Problem W/Inverter. Fuse Replaced & Manufacturer Making Changes to Inverter Model
ML20085K060	20 December 1973	Ao:On 731212,w/reactor at Full Temp & Pressure,Mechanical Failure of Oil Line in HPCI Turbine Control Sys Rendered Turbine Operable.Caused by Full Circumferential Sheer Failure of Pipe Bushing.Bushing Replaced
ML20085K070	25 January 1974	Ao:On 740117,during Operability Test on Hpci,Sys Revealed to Be Inoperable.Caused by Burrs on Cylinder Wall & Piston of Turbine Stop Valve.Burrs Removed & All Parts Thoroughly Cleaned & Inspected
ML20085M751	23 November 1973	AO BFAO-7338W:on 731115,at 25% Power W/Msiv Closed,Rcic & HPCI Sys Failed.Caused by Movable Contact of Dc Contactor Being Hung in Arcing Horn.Contactor Repaired	Safe Shutdown Reactor Vessel Water Level
ML20086H246	1 November 1972	AO 50-271/72-09:on 721026,two Barton Steam Line Differential Pressure Switches (DPIS 13-83 & 13-84) Failed to Actuate at Required Pressure of 180 Inches.Locking Devices May Be Causing Change.Switches Immediately Reset
ML20086H250	27 October 1972	AO 50-271/72-09:on 721026,two Barton Steam Line Differential Pressure Switches (DPIS 13-83 & 13-84) Actuated at 195 Inches,Exceeding Tech Spec Limit of 180 Inches.Switches Immediately Reset
ML20086H255	25 August 1972	AO 50-271/72-02:on 720801-08,airborne Contamination Levels within Containment Exceeded Average Level.Reactor Containment Required Due to Investigation of All Drywell Pressure Penetration taps.Open-ended Tees Plugged
ML20086J391	14 October 1974	AO 74-11:on 741004,RCIC Steam Line Drain Valve Failed to Close.Caused by Piece of Weld Slag Wedged in Below Seat Stem Guide.Valve Disassembled & Cleaned
ML20086J395	4 October 1974	Telecopy AO 74-11:on 741004,RCIC Steam Line Drain Valve Failed to Close.Caused by Weld Bead.Rcic Sys Blocked to Permit Disassmbly of Valve & Investigation of Problem
ML20086J403	4 October 1974	Telecopy AO 74-50:on 741004,cleanup Sys Dc Isolation Valve V-16-14 Failed to Close Electrically.Cause Under Investigation.Arc Horn on Contactor 2Bc Replaced
ML20086J425	4 October 1974	Telecopy AO 74-15:on 741004,setpoint Drift Detected on Ps 263-52A,PS 263-53A & Ps 263-53B.Caused by Setpoint Drift. Switches Recalibr
ML20086K995	8 May 1974	Telecopy AO 74-24:on 740507,RCIC Outboard Steam Isolation Valve MO-13-16 Failed to Open Following Surveillance Test. Caused by Failed Motor.Outboard & Operable Inboard RCIC Steam Isolation Valves Placed in Closed Position
ML20090C999	12 December 1975	AO 75-33:on 751212,125-volt Dc Distribution Ctr of Station a Battery Inadvertently de-energized.Caused by Failure to Establish Proper Breaker Lineup Preparation for Conducting Battery Load Test.Procedure changed.W/751219 Memo
ML20090D007	25 November 1975	AO 75-31:on 751124,drywell Vacuum Breaker Alarm Sys II Failed to Annunciate When Vacuum Breaker V-26-4 Opened. Caused by Component Failure.Corrective Action Under Investigation
ML20090D016	7 November 1975	AO 75-30:on 751106,low Reactor Pressure Core Spray Valve Permissive Pressure Switches Re 17 a & C Tripped at Pressure Less than Min Required Value.Caused by Switch Repeatability.Pressure Switches Recalibr
ML20090D060	6 November 1975	AO 75-29:on 751027,torus Drywell Vacuum Breakers Alarm Sys II Failed to Annunciate When Vacuum Breaker V-26-8 Opened. Caused by Sticking Microswitch
ML20090D076	28 October 1975	AO 75-29:on 751027,torus to Drywell Vacuum Breaker Alarm Sys II Failed to Annunciate When Vacuum Breaker V-26-8 Opened.Caused by Component Failure.Corrective Action Under Investigation
ML20090D094	24 October 1975	AO 75-28:on 751015,standby Gas Treatment Sys 1 Inoperable. Caused by Air Solenoid Valve Coil Failure.Defective Solenoid Coil Replaced
ML20090D104	16 October 1975	AO 75-28:on 751015,standby Gas Treatment Sys 1 Inoperable. Caused by Air Solenoid Valve Coil Failure.Defective Solenoid Coil replaced.W/751016
ML20090D114	17 October 1975	AO 75-27:on 751008,low Reactor Pressure Core Spray Valve Permissive Pressure Switches RE17B & D Tripped at Pressure Less than Min Required Value.Caused by Switch Repeatability. Pressure Switches Recalibr
ML20090D134	8 October 1975	AO 75-27:on 751008,low Reactor Pressure Core Spray Valve Permissive Pressure Switches RE17B & D Tripped at Pressures Less than Min Required Value.Caused by Switch Repeatability. Pressure Switches Recalibr
ML20090D150	23 September 1975	AO 75-26:on 750923,emergency Svc Water Pump 52C Failed to Start Automatically During Routine Surveillance Test of Containment Spray Sys Ii.Caused by Failure of Contact Switch in Time Delay Relay 16 K4B.Relay Replaced
ML20090D194	8 September 1975	AO 75-25:on 750829,stack Gas Sample Sys Failed to Monitor Stack Releases Continuously While Reactor Was in Unisolated Condition.Caused by Malfunctioning Pump Lubricator.Thermal Overload Protection Reset
ML20090D201	2 September 1975	AO 75-25:on 750829,stack Gas Sample Sys Failed to Monitor Stack Releases Continuously While Reactor Was in Unisolated Condition.Caused by Malfunctioning Pump Lubricator.Thermal Overload Protection Reset
ML20090D207	8 September 1975	AO 75-24:on 750829,electromatic Relief Valve Pressure Switches 1A83C & 1A83D Tripped at Pressures in Excess of Max Allowable Value.Caused by Instrument Setpoint Repeatability. Switches Reset
ML20090D215	2 September 1975	AO 75-24:on 750829,electromatic Relief Valve Pressure Switches 1A83C & 1A83D Tripped at Pressures in Excess of Max Allowable Value.Caused by Instrument Setpoint Repeatability. Switches Reset
ML20090D224	21 August 1975	AO 75-23:on 750817-20,stack Effluent for Iodine & Particulates Not Monitored.Caused by Personnel Error.Filter Installed in Operating Stack Gas Sampling Train
ML20090D226	11 August 1975	Preliminary AO-50-219/75-22:on 750810,stack Gas Sample Line Low Flow Alarm Received.Caused by Stack Gas Sample Pump a Not Running.Thermal Overload Protection Reset
ML20090D247	4 August 1975	Preliminary AO-50-219/75-21:on 750801,during Routine Surveillance on B Isolation Condensor Sys,Steam Line Valve V-14-32 Failed to Close on Simulation of Steam Line High Flow.Caused by Low Torque Switch Setting.Torque Increased
ML20090D252	17 July 1975	AO 50-219/75-19:on 750708,during Monthly Surveillance Test on Reactor High Pressure Scram Sensors,Re 03A,B,C & D, A,B & D Tripped Above Normal Trip Points.Caused by Switch Repeatability.Sensors Recalibr
ML20090D256	9 July 1975	Preliminary AO 50-219/75-19:on 750708,during Monthly Surveillance Test on Reactor High Pressure Scram Sensors,Re 03A,B,C & D,A,B & D Tripped Above Normal Trip Points.Caused by Switch Repeatability.Sensors Recalibr
ML20090D266	24 June 1975	Preliminary AO 50-219/75-18:on 750623,handhole Covers in Standby Gas Treatment Filter Train 1-1 Not in Place.Cause Under Investigation.Covers Repositioned & Secured
ML20090D273	19 June 1975	Preliminary AO 50-219/75-17:on 750619,during Surveillance Test,Core Spray Sys Parallel Isolation Valve V-20-15 Failed to Demonstrate Operability.Caused by Broken Tab on B Phase of Valve Motor Breaker Stab.Stab Replaced
ML20090D274	27 June 1975	AO 50-219/75-17:on 750619,during Surveillance Test,Core Spray Sys Parallel Isolation Valve V-20-15 Failed to Demonstrate Operability.Caused by Broken Tab on B Phase of Valve Motor Breaker Stab.Stab Replaced
ML20090D278	24 June 1975	AO 50-219/75-16:on 750614,electromatic Relief Valve Pressure Switches 1A83P & E Tripped at Pressures Exceeding Tech Spec Limit.Caused by Instrument Setpoint Drift.Switches Reset
ML20090D290	16 June 1975	Preliminary AO 50-219/75-16:on 750614,electromatic Relief Valve Pressure Switches 1A83B & E Tripped at Pressure Exceeding Tech Spec Limit.Caused by Instrument Setpoint Drift.Switches Reset
ML20090D297	6 June 1975	AO 50-219/75-15:on 750530,calculations of TIP Traces Indicated Total Peaking Factor in One Core Location in Excess of Value of Pf Given in Tech Specs.Caused by Lack of Operating Experience W/New Core Loading
ML20090D298	2 June 1975	Preliminary AO 50-219/75-15:on 750530,calculations of TIP Traces Indicated Total Peaking Factor in One Core Location in Excess of Value of Pf Given in Tech Specs.Caused by Lack of Operating Experience W/New Core Loading
ML20090D653	6 May 1975	AO-50-219/75-12:on 750426,low Reactor Pressure Core Spray Valve Permissive Pressure Switches Re 17B & C Found to Trip at Pressure Less than Tech Spec Value.Caused by Switch Repeatablilty.Switches Recalibr
ML20090D656	6 June 1975	AO-50-219/75-14:on 750529,during Surveillance Test of Containment Spray Pump Operability,Essential Svc Water Pump 1-2 Failed to Develop Sufficient Discharge Pressure.Caused by Dirt in Check Valve V-3-68.Valve Cleaned & Repaired
ML20090D658	30 May 1975	Preliminary AO-50-219/75-14:on 750529,during Surveillance Test of Containment Spray Pump Operability,Essential Svc Water Pump 1-2 Failed to Develop Sufficient Discharge Pressure.Caused by Dirt in Check Valve V-3-68.Valve Cleaned
ML20090D661	14 May 1975	AO-50-219/75-13:on 750507,during Surveillance Test,Time Delay Relay 6Kll Failed to de-energize within 15 After Pressure Sensor RE-15C Tripped.Caused by Component Failure.Relay 6Kll Replaced
ML20090D664	7 May 1975	Preliminary AO-50-219/75-13:on 750507,during Surveillance Test,Time Delay Relay 6Kll Failed to de-energize within 15 After Pressure Sensor RE-15C Tripped.Caused by Component Failure.Relay 6Kll Replaced
ML20090D670	28 April 1975	Preliminary AO-50-219/75-12:on 750426,low Reactor Pressure Core Spray Valve Permissive Pressure Switches Re 178 & C Found to Trip at Pressure Less than Tech Spec Value.Caused by Switch Repeatability.Switches Recalibr
ML20090D675	18 April 1975	AO-50-219/75-11:on 750410,leakage of Main Line Drain & Bypass Line Exceeded Tech Spec Rate.Caused by Failure of Packing on Valve V-1-110.Valve to Be Repacked
ML20090D681	11 April 1975	Preliminary AO-50-219/75-11:on 750410,leakage of Main Line Drain & Bypass Line Exceeded Tech Spec Rate.Caused by Failure of Packing on Valve V-1-110.Valve to Be Repacked

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