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    "query_string": "[[Category:ABNORMAL OCCURRENCE REPORTS (SEE ALSO LER &amp; RO)]] [[Site::Robinson]]",
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	Issue date	Title	Topic
ML20084S909	31 May 1976	Ao:On 770527,HPCI Pressure Switches E41-PSH-NO12 A,B,C & D Exceeded Tech Spec Calibr Limits.Switches Immediately Recalibr
ML20084S912	25 March 1977	Telecopy Ao:On 770324,containmet Spray Pump a Out of Svc During Training Startup,Violating Tech Spec
ML20085D062	17 July 1973	Ao:On 730628-0705 & 09-10,changes Performed on Safeguards Equipment W/O Demonstrating Operability of Redundant Equipment Before Removal.Safety Injection Pumps B & C Tripped & Circuit Breaker Tripped,Respectively
ML20085D066	11 July 1973	Telecopy Ao:On 730709,two Safety Injection Pumps Experienced Overcurrent Trips.Caused by New Overcurrent Trip Devices Tripping at Lower than Desired Value.Trip Setting Increased
ML20085D072	10 July 1973	Telecopy Ao:On 730710,circuit Breaker for Containment Cooler Fan Tripped.Caused by Instantaneous Overcurrent Due to Misalignment of Calibr Spring in Overcurrent Trip Device. Spring Realigned
ML20085D077	10 July 1973	Telecopy Ao:On 730710,circuit Breaker for Containment Cooler Fan 2 Tripped.Caused by Overcurrent Due to Misalignment of Calibr Spring in Overcurrent Trip Device.Spring Realigned
ML20085D084	9 July 1973	Telecopy Ao:On 730709,two Safety Injection Pumps Experienced Overcurrent Trips.Caused by Overcurrent Trip Devices Tripping at Lower than Desired Value.Trip Setting Increased
ML20085D105	21 June 1973	Telecopy Ao:On 730620,during Test of Turbine Redundant Overspeed Trip Sys,Turbine Trip Occurred.Caused by High Pressurizer Pressure.Turbine Stop Valve Limit Switch Adjusted	Overspeed trip
ML20085D109	21 June 1973	Telecopy Ao:On 730620,during Test of Turbine Redundant Overspeed Trip Sys,Turbine Trip Occurred.Caused by High Pressurizer Pressure.Turbine Stop Valve Limit Switch Adjusted	Overspeed trip
ML20085D117	22 June 1973	Ao:On 720119,0221,0320 & 0920,pressurizer Level Reactor Trip Occurred,On 720320,0421,0518,0620,0720,0823 & 0920, Pressurizer High Pressure Reactor Trip Occurred & on 720119 Pressurizer Low Pressure Reactor Trip Occurred
ML20085D133	14 June 1973	Ao:On 730605,erroneous Indication of Containment Vessel Pressure Transmitter PI-950B Reported on Plant Trouble Ticket.Caused by Vent Valves Open to Environ.Plugs Installed in Valves
ML20085D157	6 June 1973	Telecopy Ao:On 730605,vent Valves on Pressure Sensing Line to Containment Pressure Transmitters Found Open.Plugs Installed & Valves Added to Check Off Sheet
ML20085D167	6 June 1973	Telecopy Ao:On 730605,vent Valves on Pressure Sensing Line to Containment Pressure Transmitters Found Open.Plugs Installed & Valves Added to Check Off Sheet
ML20085D226	18 April 1973	Telecopy Ao:On 780410,inadvertent Liquid Release Occurred Resulting in Release of Small Amount of Particulate & Tritium Activity to Storm Drain Sys
ML20085D296	6 November 1972	Telecopy Ao:On 721105,power Operated Release Valve UR-2 Was Opened & Failed to Close.Ltr to Be Forwarded within 10 Days
ML20085D370	27 October 1972	Telecopy Ao:On 721027,containment Integrity Violated Due to Outer Door of Personnel Hatch Opened for Approx 10 W/Inner Door Open 4 Inches.Violation Necessary to Permit Technicians Exit from Hatch
ML20085D473	16 June 1972	Ao:Containment Spray Pump a Would Not Rotate Freely When Turned by Hand.Caused by Galled Impeller Ring Binding on Casing Alignment Seal Ring.Impeller & Casing Alignment & Impeller Alignment Seal Rings Replaced
ML20085D484	7 June 1972	Telecopy Ao:Containment Spray Pump Found to Be Binding.Pump Being Disassembled for Repairs
ML20085D514	16 May 1972	Ao:On 720508,HX B Isolated for Leakage Following Alarm & Increase in Component Surge Tank Level.Hx Will Be Inspected & Repaired
ML20085D532	25 February 1972	Ao:On 720213,emergency Diesel Generator 2A Failed to Start.Caused by Momentary Indication of High Crankcase Pressure.Diesel Trip Signals Bypassed by Key Switch for Each Engine Listed	Overspeed trip
ML20085D549	20 January 1972	Ao:On 720117,emergency Diesel Generator 2A Tripped After Manual Start Initiated.Caused by High Crankcase Pressure. Alarm Reset & Diesel Restarted
ML20085D578	14 January 1972	Ao:On 720103,emergency Diesel Generator B Failed to Start. Caused by Dirt Particles in Starting Air Solenoid Valve. Valve Cleaned
ML20086B103	30 November 1971	Ao:On 711124,alarm Received on Radiation Monitoring Sys Channel R-17.Leak Determined to Be in Pressurizer Liquid Space Sample HX
ML20086B110	21 December 1971	Ao:On 711130,alarm on Radiation Monitoring Sys Indicated That Sample HX Developed Leak.Defective HX Replaced. Westinghouse to Investigate Repeated Failures & Make Recommendations Re Adequate Design for Sample HX
ML20086D421	9 February 1976	AO 50-261/76-3:on 760128,high Level Alarm Received on Safety Injection Accumulator B.Caused by Check Valve 875 Leaking Resulting in Dilution.Accumulator Partially Drained & Refilled
ML20086D427	29 January 1976	Telecopy Ao:On 760128,sample of Safety Injection Accumulator B Indicated Boron Concentration of 1,939 Ppm,Below Tech Specs.Accumulator Partially Drained,Refilled & Verified
ML20086D439	22 January 1976	Ao:On 760124 & 22,discovered That Reactor Trip Relay RT3 in Reactor Protection Logic Train a Operating Erratically. Further Investigation Revealed That Relays RT-4 & RT-8 on Logic Train B Defective.Relays Replaced
ML20086D442	2 February 1976	AO 50-261/76-2:on 760121 & 22,failure of One & Delayed Operation of Two Reactor Trip Relays Occurred.Caused by Open Coil Winding.Three Defective Relays Replaced
ML20086D447	13 January 1976	AO 50-261/76-1:on 760102,failure of Boric Acid Transfer Pump Resulted in Failure of One ESF Component That Caused or Threatened to Render Sys Incapable of Functioning.Caused by Damaged Rotor	Boric Acid
ML20086F516	8 December 1975	Ao:On 751208,boron Sample from Safety Injection Accumulator B Indicated 1,915 ppm,35 Ppm Below Tech Specs.Cause Unknown. Accumulator Partially Drained & Refilled from Refueling Water Storage Tank
ML20086F521	2 January 1976	Ao:On 760102,boric Acid Pump B Stopped Running.Caused by Defective Stator & Damaged Rear Bearing.Investigation Continuing	Boric Acid
ML20086F529	4 November 1975	Ao:On 751102,motor Driven Auxiliary Feedwater Pump a Failed to Start.Remote Electrical Contacts Cleaned
ML20086F540	3 November 1975	Ao:On 751101,containment Integrity Broken for Approx 10 Minutes Due to Simultaneous Opening of Both Personnel Air Lock Doors
ML20086F549	29 October 1975	Ao:On 751028,sequence of Switch Operations Resulted in Breakers for Both Svc Water Booster Pumps a & B Tripping on Overload
ML20086F561	22 September 1975	Ao:On 750921,urgent Failure Alarm Received.Caused by Phase Failure in Cabinet 1AC Which Rendered 12 Rods Inoperable. Reactor Manually Tripped
ML20086F579	12 May 1975	AO 50-261/75-9:on 750501,reactor Coolant Pump Seal Failed, Resulting in Discharge of Reactor Coolant Fluid to Containment Floor.New Seal & Associated Parts Being Installed.Parts Shall Be Certified
ML20086F596	16 July 1975	Telecopy Ao:On 750715,steam Drive Auxiliary Feedwater Pump Discharge Valve V2-14B to Steam Generator B Failed to Open Electrically
ML20086F608	26 June 1975	Telecopy Ao:On 750625,boric Acid Transfer Pump a Noted Off. Caused by Pump Shaft Being Broken at Keyway.Also on 750625, Employee Received Whole Body Dose of 3,080 Mrem for Quarter Ending 750630	Boric Acid
ML20086F615	14 July 1975	Ao:On 750711,control Rod L-5 Dropped,Causing Load Runback to Approx 70% Power.Caused by Defective Stationary Gripper Coil
ML20086F620	6 June 1975	AO 50-261/75-11:on 750527,RCS Oxygen Concentration Noted to Be 0.16 Ppm,Exceeding Limit.Caused by Mixture of Hydrogen & Nitrogen in Vol Control Tank,Limiting Hydrogen to Rcs.Vol Control Tank Vented
ML20086F623	27 May 1975	Ao:On 750527,RCS Sample Indicated 0.16 Ppm Oxygen,Exceeding Tech Specs.No Cause Stated.Concentration Reduced
ML20086F627	2 June 1975	AO 50-261/75-10:on 750521,boric Acid Transfer Pump B Failed.Caused by Shaft Being Broken at Keyway & Worn Pump Bearing.Pump Rebuilt	Boric Acid
ML20086F630	21 May 1975	Ao:On 750521,boric Acid Pump B Stopped.Caused by Broken Shaft in Keyway Area	Boric Acid
ML20086F644	9 May 1975	AO 50-261/75-8:on 750429,RHR Pump Suction Valve RHR-862A Failed.Caused by Torque Switch on SMB-O Motor Operator Being Out of Adjustment.Torque Switch Adjusted.On 750430,complete Insp of Operator Found Excess Grease.Grease Removed
ML20086F647	29 April 1975	Ao:On 750429,valve RHR-862A Failed to Open from RTGB When RHR Sys Being Aligned.Cause Under Investigation.Valve Opened Locally Using Manual Operator & All Flow Paths Restored
ML20086F674	12 June 1975	Revised AO 50-261/75-9:on 750501,reactor Coolant Pump Seal Failed,Resulting in Discharge of Reactor Coolant Fluid to Containment Floor.Caused by Pump Running W/Seal Leaking. Seals,Shaft,Impeller & Hearings Replaced
ML20086F691	2 May 1975	Telecopy Ao:On 750501,seal 1 on Reactor Coolant Pump C Failed,Producing Leak to Containment Floor.Seal 2 Failed on 750502.Cooldown Initiated.Rcs Depressurized & Drained to Below Pump Seals
ML20086F696	1 April 1975	Telecopy Ao:On 750331,emergency Diesel B Tripped.Caused by Low Lube Oil Pressure.Filters Changed & Unit Returned to Svc
ML20086F698	10 April 1975	AO 50-261/75-7:on 750331,diesel B Tripped Due to Low Lube Oil Pressure.Caused by Lube Oil Filter High Differential Pressure Resulting from Dirty Filters.Lube Oil Filters Replaced
ML20086F699	27 March 1975	AO 50-261/75-6:on 750314,contractor Personnel Exposed to Radiation in Excess of Limits.Caused by Exceeding Stay Time in Localized Field of High radiation.Chem-Nuclear,Inc & Util Investigating Use of Addl Shielding	High Radiation Area

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