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This page provides a simple browsing interface for finding entities described by a property and a named value. Other available search interfaces include the page property search, and the ask query builder.
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- 05000219/LER-1976-029-01, /01P-0:on 761220,testing Results Indicated That Certain Relief Valve Opening Sequences Could Result in Unacceptably High Stresses on Torus.Caused by Design Deficiency.Steam Vent Clearing Phenomena Not Considered +
- 05000219/LER-1976-001-01, /01P-0:on 760102,during Test of High Drywell Pressure Initiation of Core Spray Sys 2,high Drywell Pressure Switch RV46B Tripped at 2.75 Psig.Caused by Failure of Barton Itt Model 278 Pressure Switch +
- 05000219/LER-1976-002-01, /01P-0:on 760106,local Leak Rate Tests Revealed That Reactor Bldg to Torus Vacuum Breakers V-26-16 & V-26-18 Had Combined Leakage Rate in Excess of Tech Specs Limit. Cause Unknown.Valves Will Be Adjusted &/Or Repaired +
- 05000219/LER-1976-008-03, /03L-0:on 760326,while Performing Surveillance of High Drywell Pressure Initiation of Core Spray Sys Pressure Switch RV46C Trip Point Found Less Conservative than Tech Specs Limit.Cause Not Stated.Pressure Switch Reset +
- 05000219/LER-1976-009-03, /03L-0:on 760401,during Automatic Actuation Test for Containment Spray Sys 2 Trip Point for Drywell High Pressure Switches 1P15B & 1P15D Found Less Conservative than Tech Specs Limit.Caused by Instrument Setpoint Drift +
- 05000219/LER-1976-015-03, /03L-0:on 760425,during Surveillance of Core Spray Sys 2 Pumps,Leak Found in Sensing Line Leading to RV40B Pressure Switch.Caused by Cold Cycle Fatigue Failure.Sensing Line Replaced +
- 05000219/LER-1976-005-01, /01P-0:on 760303,during Diesel Generator Loading Test Procedure,Diesel Generator 2 Started in Fast Start Mode,But Did Not Develop Sufficient Voltage to Come on to 1D Bus & Assume Sequential Loads.Caused by Relay Failure +
- 05000219/LER-1976-014-03, /03L-0:on 760423,operations Personnel Discovered That Inboard Pump Seal on Core Spray Pump NZ01B Cracked. Cause Unknown.Pump Seal Replaced & Pump Returned to Svc +
- 05000219/LER-1976-004-01, /01P-0:on 760123,during Surveillance Testing, Cooling Water Pressure Found Less than Tech Specs Limit. Caused by Loss of Engine Coolant Through Radiator Tube Leak. Radiator Repaired +
- 05000251/LER-1976-003-01, /01T:on 760517,tube Support Plate Section of Steam Generator 4C Discovered to Be Cracked.Cause Under Investigation.Manufacturer Evaluating Occurence +
- 05000251/LER-1976-001-03, /03L:on 760130,channel 2 Overtemp delta-T Reactor Trip Setpoint Exceeded Tech Spec Limit by One Degree.Caused by Failure of Two Filter Capacitors in Signal Summator. Capacitors Replaced +
- 05000251/LER-1976-004-01, /01T:on 760611,boron Concentration of Injection Tank & Two of Three Storage Tanks Below 20,000 Ppm Limit. Caused by in-leakage from Reactor Water Storage.Shutdown Initiated +
- 05000250/LER-1976-009-03, /03L:on 761015,charging Pump 3B Removed from Svc Because of Damaged Rod Bearings.Caused by Insufficient Lubrication of Bearings.Pump Casing of Pump 3B Installed on Pump 3A & Pump 3A Returned to Svc +
- 05000250/LER-1976-005-01, /01T:on 760805,Westinghouse Informed of New Development on Results of Safety Analysis.Caused by Increase of Temp of Fluid in Upper Head & Increased Rod Bow Penalty +
- 05000250/LER-1976-004-01, /01T:on 760611,boron Concentration of Injection Tank Below 20,000 Ppm Limit.Caused by Recirculation W/Low Concentration of Boric Acid Storage Tank B.Shutdown Initiated +
- 05000250/LER-1976-002-01, /01T:on 760306,closing Spring of Emergency Diesel Generator 3B Breaker Not Charged.Caused by Worn Bushing on Charging Motor Drive Pawl.Spare Breaker Installed +
- 05000251/LER-1976-006-03, /03L:on 760726,generator 4 Tripped by Lockout Action.Caused by Switch Not Making Proper Contact Preventing Breaker from Closing.Breaker Lowered & Raised to Establish Contact +
- 05000250/LER-1976-010-03, /03L:on 761125,trip Setpoint of Steam Flow Comparator FC-3-484 Found to Be Nonconservative.Caused by Failure of Two Filter Capacitors on Printed Circuit Board. Capacitors to Be Replaced +
- 05000251/LER-1976-005-01, /01T:on 760612,boron Concentration of Boron Injection Tank & B Boric Acid Storage Tank Below 20,000 Ppm.Caused by in-leakage from Refueling Water Storage Tank. Shutdown Initiated +
- 05000251/LER-1976-002-01, /01T:on 760214,water Level in Refueling Water Storage Tank 1% Lower than Tech Spec Requirement.Caused by Poor Calibr Ability of Wide Range Indicator Gage.Narrow Range Gage Will Be Installed as Backup +
- 05000250/LER-1976-006-01, /01T:on 760909,closing Springs in Diesel Generator 3A Circuit Breaker Not in Charged Position.Caused by Worn Nylon Bushing Between Closing Spring Drive Motor & Linkage to Ratchet Wheel +
- 05000251/LER-1976-007-01, /01T:on 761002,diesel Generator a Engine Cooling Water Tank Level Found Low.Caused by Sample Valve Not Being Fully Closed After 761001 Water Sample.Valve Closed & Water Added +
- 05000250/LER-1976-008-01, /01T:on 761006,boron Concentration of Injection Tank Below 20,000 Ppm Limit.Cause Undetermined.Shutdown Initiated +
- 05000219/LER-1976-003-01, /01P:on 760106,standby Gas Treatment Sys Failed to Demonstrate Capability to Maintain 0.25 Inch of Water Vacuum.Caused by Personnel Error.Inner Railroad Airlock Door Not Closed properly.W/760112 Memo +
- 05000250/LER-1976-001-03, /-03L:on 760219,water Found Leaking from Charging Pump 3A.Cause of Crack in Pump Casing Not Yet Determined. Crack Weld Repaired & Pump Returned to Svc +
- 05000220/LER-1976-017-01, :on 760428,fish Impingement on Traveling Screens Found in Excess of ETS Limits of 20,000 Per 24 H.Caused by Annual Migration +
- 05000220/LER-1976-014, :on 760420,fish Impingement on Traveling Screens Found in Excess of ETS Limits of 20,000/24 H.Caused by Annual Migration +
- 05000220/LER-1976-015, :on 760424,fish Impingement Found Increasing. Caused by Annual Migration +
- 05000220/LER-1976-001, :on 760117,RV-30 a & B Core Spray Delta P Instrumentation Indicated Out of Normal Range.Caused by Setpoint Drift in Conservative Direction +
- 05000250/LER-1976-003-03, /03L:on 760519,output 1 of Pressurizer Level Comparator LC-459A Tripped at 4.685 Volts Instead of 4.680 Volts.Caused by Setpoint Drift.Trip Setpoint Reset to Conservative Value +
- 05000220/LER-1976-016, :on 760427,fish Impingement on Traveling Screens Found in Excess of ETS Limits of 20,000 Per 24 H.Caused by Annual Migration +
- 05000220/LER-1976-005, :on 760210,refuel Platform High Range Monitor Calibr Indicated Response of 350 M/R Rather than 800 M/R. Caused by Failed Detector.Detector Replaced +
- 05000220/LER-1976-002, :on 760204,MAPHLGR Kw/Ft Vs Exposure Curve Points Discovered in Error by No More than 0.1 Kw/Ft Nominal Maphlgr Limit 8.52 Kw/Ft.Caused by Interpolation of Tech Specs W/O Grid or Breakpoints +
- 05000220/LER-1976-018, :on 760508,fish Impingement on Traveling Screens Determined to Be in Excess of 20,000 Per 24 H.Cause Unknown. Influx of Alewives & Rainbow Smelt Occurs Annually +
- 05000220/LER-1976-003, :on 760207,high Drywell Pressure Indicator Tripped Low.Caused by Setpoint Drift +
- 05000220/LER-1976-006, :on 760215,loss of HPCI Component Occurred Due to Apparent Failure of Pump Suction Pressure Switch.Caused by Disconnected Linkage Arm on Mercoid.Arm Reconnected +
- 05000250/LER-1976-007-01, /01T:on 760805,heat Flux Hot Channel Factor & Enthalpy Rise Hot Channel Factor Allowable Max Reduced. Caused by Increased Limit for Upper Head Fluid & Rod Bow Penalty +
- 05000220/LER-1976-004, :on 760207,reactor lo-lo-lo Level Indicator Actuated High.Caused by Setpoint Drift +
- 05000220/LER-1976-017, :on 760428,fish Impingement Upon Traveling Screens Found in Excess of ETS Limits of 20,000 Per 24 H.Caused by Annual Migration +
- 05000285/LER-1976-005-03, /03L:on 760315,channel 383 Left Pressure Switch A/LC-383-1 Found Drifted Out of Spec.Cause Not Stated. Switch Recalibr & Will Be Checked Monthly for Proper Operation +
- 05000285/LER-1976-007-03, /03L:on 760327,channel a Axial Power Distribution Positive Limit Noted to Be 12.1.Caused by adder-subtractor Module 19-301A Going Into Oscillation & Saturated.Module Replaced & Calculator Returned to Svc +
- 05000285/LER-1976-005, Suppl 1 to LER 76-05/03L:on 770210,recirculation Actuation Pressure Switches Found Out of Tolerance.Cause Not Stated. Switch Will Be Calibr Monthly Until New Switches Installed +
- 05000285/LER-1976-009-03, /03L:on 760320,erosive Wear Found on Raw Water Pump Impellers & Galvanic Corrosion Found in Connecting Threads of Top Case Bearing.Caused by Erosive Nature of Missouri River Water.Impellers Built Up +
- 05000285/LER-1976-008-03, /03L:on 760329,loss of Power Occurred to 161 Kv/ 4160 Volt House Svc Transformers T1A-3 & 4.Caused by Fault in Offsite 161 Kv Supply.Diesel Generators Started to Verify Operability +
- 05000285/LER-1976-012-03, /03L:on 760405,channel B Axial Power Distribution Positive Limit Read 12.1.Caused by adder-subtracter Module 19-301A Going Into Oscillation & Saturated.Module Replaced & Calculator Returned to Svc +
- 05000285/LER-1976-010-03, /03L:on 760401,high Power Margin to Trip Meter B Drifted from 4.2% to 6% Power.Caused by Feed Back Limiter Module Found Drifted.Module Calibr & Operated Satisfactorily +
- 05000285/LER-1976-010, Suppl to LER 76-10/03L:on 760401,high Power Margin to Trip Meter B Drifted from 4.2% to 6% Power.Caused by Drift of Feed Back Limiter Module 19-317-2X.Module Calibr & Operated Satisfactorily +
- 05000285/LER-1976-011-03, /03L:on 760407,start on Secondary Air Diesel Required 10.6-s.Caused by Inadequate Procedure.Restart on Secondary Air Required 8.1-s +
- 05000285/LER-1976-015-03, /03L:on 760408 & 20,inadvertent Noble Gas Releases to Auxiliary Bldg Occurred Due to Valve leak-by on Chemical & Vol Control Sys.Caused by Leakage by Standby Ion Exchanger CH-8A Isolation Valves +
- 05000285/LER-1976-018-03, /03L:on 760514,possible Violation of Release Rate for Containment Purge 76A-11 Discovered.Caused by Inaccurate High Reading by Sensitive Spectrometer Sys.Violation Did Not Occur +