Pages that link to "05000280/LER-1985-001"
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The following pages link to 05000280/LER-1985-001:
Displayed 50 items.
- 05000280/LER-1984-015, :on 840613,control Room Operator Observed Loss of Main Feed Pump a & Lowering of Steam Generator Water Levels.Caused by Loosening of Bearing Capscrews.Capscrew & Bolt Torque Specified in Maint Procedure (← links)
- 05000280/LER-1984-014, :on 840613,specific Activity Sample of Reactor Coolant Showed Peak Dose Equivalent I-131 Level of 1.99 Uci Which Exceeded Tech Spec Limit.Caused by Fuel Element Defects in Reactor Core.Monitoring Performed Every 4 H (← links)
- 05000280/LER-1984-012-01, :on 840526,specific Activity Sample of Reactor Coolant Showed Peak Dose Equivalent I-131 Level of 1.57 Uci Which Exceeded Tech Spec Limit.Caused by Fuel Element Defects in Reactor Core.Dose Equivalent Monitored Every 4 H (← links)
- 05000280/LER-1984-005, :on 840301,while Performing Mop 26.9,vital Bus Sola Transformer I-I,vital Buses I & III Mistakenly Cross Connected Out of Phase,Causing Spurious Containment High Pressure & High Steam Flow Signals (← links)
- 05000280/LER-1984-003-01, :on 840206,reactor Tripped Due to Low Steam Generator Level W/Steam Flow/Feed Flow Mismatch in Steam Generator A.Caused by Tripped Feedwater Breaker Closing. Breaker Replaced (← links)
- 05000280/LER-1975-014-01, /01T:on 750801,boron Concentration in Accumulator 1C Approx 1,850 Ppm.Caused by Inleakage Through Loop Check Valve.Primary Sys Pressure Increased to Seat Check Valves. Accumulator Drained (← links)
- 05000280/LER-1975-015-01, /01T:on 750803,leaking Fitting on Overhead Gas Compressor B Resulted in Unplanned Release of Radioactive Matl from Site.Caused by Loose Fitting.Leaking Fitting Repaired (← links)
- 05000280/LER-1975-017-01, /01T:on 750915,one Channel of Redundant Heat Tracing Failed.Caused by Breaker Trip on Overload Due to Short Circuit by Svc Water Leak.Leak Secured & Transformer Repaired (← links)
- 05000280/LER-1975-018-01, /01T:on 750924,loop a Instrumentation Drifted Low. Caused by High Moisture Content in Containment Atmosphere. RTD Will Be Repaired or Replaced (← links)
- 05000280/LER-1975-019-01, /01T:on 750925,loop B Temperature Change Instrumentation Drifted Low.Caused by Moisture Content of Containment Atmosphere.Spare RTD Placed in Svc & Shutdown Terminated (← links)
- 05000280/LER-1975-022-01, /01T:on 750927,test of Main Steam Safety Valve Setpoint Indicated Four Valves Not within Plus or Minus 1% of Setpoint.Caused by Setpoint Drift.Valves Adjusted & Retested (← links)
- 05000280/LER-1975-023-01, /01T:on 751013,channels P-1-455,P-1-456 & P-1-457 Found Indicating High by 26.4 psi,42.0 Psi & 29.4 Psi, Respectively.Caused by Overranging of Zero Spring in Prior Calibr.Procedure Revised (← links)
- 05000280/LER-1975-016-01, /01T:on 750822,Channel II Protection Drifted in Nonconservative Direction.Caused by Incorrect Resistance of Hot Leg Resistance Temp Detector (Rtd).Packing Replaced & RTD Ohmic Characteristic Returned to Normal (← links)
- 05000280/LER-1975-024-01, /01T:on 750116,containment Leak Rate Test Revealed Overall Integrated Containment Leakage Rate Greater than Acceptable Criterion.Caused by Two Defective Tubes in Steam Generator A.Tubes Plugged (← links)
- 05000280/LER-1975-025-01, /01T:on 751129,uncontrolled & Unplanned Release of Low Level Radioactive Matl Occurred.Caused by Primary Grade Water Tank 1-PG-TK-1B Overflow Due to Operator Error. Administrative Action Taken (← links)
- 05000280/LER-1975-026-01, /01T:on 751130,auxiliary Feedwater Pump Discharge Valve MOV-FW-151A Failed to Automatically Open When Main Feed Pumps Locked Out.Caused by Failure of Switch.Adjustment of Lever Arm Corrected Problem (← links)
- 05000280/LER-1975-027-01, /01T:on 751205,uncontrolled & Unplanned Release of Low Level Radioactive Matl Occurred.Caused by Primary Grade Water Tank 1-PG-TK-1A Overflow Due to Operator Error. Administrative Action Taken (← links)
- 05000280/LER-1975-028-01, /01T:on 751211,auxiliary Feedwater Pump Discharge Valve MOV-FW-151A Failed to Automatically Open When Low Low Level Experienced During Draining of Steam Generator B. Caused by Malfunction of Timing Relay (← links)
- 05000280/LER-1975-031-01, /01T:on 751219,steam Generator C Pressure Indication 494 Channel II Failed High.Caused by Frozen Sensing Line.Louvers Closed & Sealed Allowing Line to Thaw & Transmitter Returned to Normal Svc (← links)
- 05000280/LER-1975-030-01, /01T:on 751230,two Component Cooling Water/Svc Water HX Tubes Noted Leaking Indicating Inadvertent Release of Low Level Radioactive Water to James River.Caused by Plugs Loosened During Operation (← links)
- 05000280/LER-1976-011-03, /03L:on 760823,diaphragm in Valve 1-CH-125 Failed Causing Leakage of Boric Acid.Caused by Normal Operation. Valve Repaired (← links)
- 05000280/LER-1976-012-03, /03L:on 760909,low Pressure Alarm Occurred on Safety Injection Accumulator C.Caused by HCV 1936 Partially Open & Body to Bonnet Leaks on HCV-1898 & 1549.Repairs Made on HCV 1936,1898 & 1549 (← links)
- 05000280/LER-1976-013-03, /03L:on 760916,normal Boric Acid Makeup to Vol Control Tank Could Not Be Accomplished Due to Plugging of CVCS Line 1 inch-CH-56-152.Caused by Routine Use of Line. Blank Flange Installed to Clear Lines (← links)
- 05000280/LER-1976-015-03, /03L:on 761018,MOV-CW-100A Failed to Close When Train B Cls Hi Hi Signal Actuated.Caused by Loose Terminal Screw on Cable XI at Breaker 1J1-123.Screw Tightened (← links)
- 05000280/LER-1976-016-03, /03L:on 761101,comparator TC-1-432C Failed to Trip.Caused by Power Capacitor Malfunction.Comparator Replaced (← links)
- 05000280/LER-1976-017-03, /03L:on 761026,relay VS-103A Failed on Energized Position of Train a Safety Injection Initiation.Caused by Dirty Magnetic Field Pole Surface.Assemblies & Magnetic Field Pole Surface Cleaned (← links)
- 05000280/LER-1976-018-03, /03L:on 761103,discovered Manipulator Crane Area Monitor Inoperable.Caused by Corrosion of 12 Volt & 22 Volt Power Cables.Monitor Repaired & Returned to Svc.W/ (← links)
- 05000280/LER-1976-001-01, /01T:on 760302,discovered Process Vent Air Particulate Monitor Isolated.Caused by Technician Error. Monitor Returned to Svc & Technician Instructed to Ensure Full Operability (← links)
- 05000280/LER-1976-002-01, /01T:on 760313,determined That Worst Break LOCA Core Thermal Transient Analysis Inaccurate Since Effects of Steam Generator Tube Plugging Not Included.Cause Unknown. Research Being Conducted (← links)
- 05000280/LER-1976-003-01, /01T:on 760721,discovered Outputs of Two Pressure Switches PS-LM-100C & 100D Still Jumpered to Prevent Initiation of Cls Containment Hi Signal.Caused by Failure to Review Jumper Log at Proper Time (← links)
- 05000280/LER-1976-004-01, /01T:on 760723,indicated Axial Flux Difference Found Outside +6% to -9% Band.Caused by Computer Using Delta I Target Value of -2.0% Instead of 6.5%.Value of Delta I Brought within Correct Target Band (← links)
- 05000280/LER-1976-002-03, /03L:on 760318,auxiliary Feedpump Discharge Valve MOV-FW-151A Failed to Open When Main Feedpump Breakers Opened.Caused by Timing Relay Plunger Failure to Activate Micro Switch.Timing Relay & Switch Replaced (← links)
- 05000280/LER-1976-003-03, /03L:on 760326,ruptured Diaphragm in Valve 1-CH-85 Caused Exccessive Leakage of Borated Water.Caused by Normal Wear.Power Rampdown Commenced,Valve Repaired & Placed Back in Svc (← links)
- 05000280/LER-1976-004-03, /03L:on 760416,during Start Test,Emergency Diesel Generator 1 Damaged Due to Flooded Piston Cylinder 17. Caused by Crack in Cylinder Head.Engine Repaired (← links)
- 05000280/LER-1976-007-03, /03L:on 760702,during Preparation for Start Test of Emergency Diesel Generator 1,water Observed Coming Out of Cylinder 19.Caused by Crack in Cylinder.Engine Repaired by Replacing Cylinder Head & Gasket (← links)
- 05000280/LER-1976-008-03, /03L:on 760702,safety Injection Accumulator B Indicated 1,928 Ppm Boron.Caused by Leaking Check Valves 1-SI-128 & 1-SI-130.Accumulator Recirculated in Raw Water Storage Tank to Increase Boron Concentration (← links)
- 05000280/LER-1976-005-01, /01T:on 760805,NSSS Vendor Informed of Error Discovered in LOCA ECCS Analysis.Reactor Vessel Upper Head Water Temp Should Be Assigned Value Similiar to Hot Leg Temp (← links)
- 05000280/LER-1976-006-01, /01T:on 760805,NSSS Vendor Informed That Rod Bow Effect on Thermal Margins Exceeded Expectations.Cause Unknown (← links)
- 05000280/LER-1976-007-04, /04T:on 760913,during Recalculations of Previous 12 Months,Gaseous & Airborne Particulate Release,Monthly Average,Figured at 0.188% Higher than Limit.Caused by Procedural Errors (← links)
- 05000280/LER-1976-008-01, /01T:on 761007,broken Stud from Steam Generator 2A Girth Strap Discovered.Caused by Degradation of Stud Coating & High Stresses Developed During Mfg.Studs Replaced.Addl Rept Encl (← links)
- 05000280/LER-1977-001-03, /03L:on 761113,pressurizer Safety Valve Setpoints for Valves SV-1551A & SV-1551B Found Below 2,485 Psig Requirement.Caused by Setpoint Drift.Testing Procedure Will Be Revised (← links)
- 05000280/LER-1977-002-03, /03L:on 770120,valves SV-MS-101B & SV-MS-102B Exceeded Setpoint Limits of 1,085 & 1,095 Psig,Respectively. Caused by Setpoint Drift.Valves Adjusted (← links)
- 05000280/LER-1977-004-03, /03L,on 770126,reactor Exceeded 90% Power Hold Point Prior to Recalibr of ex-core Symmetrical Offset Detector Sys to in-core Instrumentation Sys.Caused by Personnel Error.Power Reduced (← links)
- 05000280/LER-1977-005-03, /03L:on 770126,when Recirculation to Boron Injection Tank Halted to Repair Leaking diaphragms,150 Mwe/H Rampdown Initiated.Caused by Faulty Diaphragm Matl.Valves Will Be Replaced Periodically (← links)
- 05000280/LER-1977-006-03, /03L:on 770208,charging Pump Cooling Water Pump 1-CC-P-2A Tripped Due to Thermal Overload.Caused by Faulty Motor Bearings.Bearings Replaced & Minor Mechanical Defects Corrected (← links)
- 05000280/LER-1977-007-03, /03L:on 770215,safety Valve SV-MS-101A Lifted Prematurely at Approx 950 Psi,Below Normal Setpoint of 1,085 Psi.Caused by Torque Limiting Device Setting Low Causing Drift.Safety Valves Reset (← links)
- 05000280/LER-1977-008-03, /03L:on 770220,when Recirculation Halted to Replace Leaking Diaphragm in Valves 1-CH-98,150 Mwe/H Rampdown Initiated.Draphragm Failure Caused by Valve Overtightening When Shutting (← links)
- 05000280/LER-1977-009-03, /03L:on 770219,chemical Addition Tank Discharge Valve MOV-CS-102A Position Indicating Lights Extinguished. Caused by Incorrectly Wired Switch.Maint Procedure Revised (← links)
- 05000280/LER-1977-010-03, /03L:on 770328,high Steam Flow Relay FC-485-XA Malfunctioned.Caused by Foreign Matl Impregnating Bf Relay. Debris Removed (← links)
- 05000280/LER-1975-001-03, /03L:on 750218,pump 1-SW-P-6 Supplying Radiation Monitor RM-SW-107 Failed.Caused by Erosion.Sampling Initiated Until Design Mod Installed (← links)