ML20045H241
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| ML20045H241 | |
| Person / Time | |
|---|---|
| Site: | Duane Arnold  |
| Issue date: | 07/09/1993 |
| From: | Mcgee R, Denise Wilson IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT |
| To: | Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| LER-93-004, LER-93-4, NG-93-2759, NUDOCS 9307200004 | |
| Download: ML20045H241 (6) | |
Similar Documents at Duane Arnold | |
|---|---|
Category:LICENSEE EVENT REPORT (SEE ALSO AO
MONTHYEARML20045H2411993-07-0909 July 1993
[Table view]LER 93-004-00:on 930611,while Performing EDG Operability Surveillance,Edg a Tripped Approx 3 After Initial Start Signal.Possibly Caused by Partially Latched Condition of Trip Mechanism.Latch Will Be reset.W/930709 Ltr ML20045D6451993-06-18018 June 1993 LER 92-013-01:on 920817,scram Setpoint Was Reduced Due to Induced Noise Signal Which Caused Automatic Scram to Occur. C/As:Installed Inductors in Affected Flow Transmitter circuits.W/930618 Ltr ML20045D5991993-06-18018 June 1993 LER 93-003-00:on 930525,primary Containment Isolation Sys Half Group III Isolation Occurred Due to Loss of Jumper to Terminal Continuity During Planned Maint.Automatic Actions Confirmed & Signal Received verified.W/930618 Ltr ML20024B0581983-06-22022 June 1983 LER 83-017/03L-0:on 830523,while Operating in Torus Cooling Mode,Pressure Differential Across RHR Svc Water Strainer 1S-90B Increased.Caused by Sheared Motor Coupling Shear Pins.Two Shear Pins installed.W/830622 Ltr ML20024A4611983-06-10010 June 1983 LER 83-021/01T-0:on 830527,containment H202 Analyzer Channel a Rendered Inoperable.Caused by Calibr Difficulties Due to Fouled Pressure Regulators Resulting from Sys Contamination. Tech Specs revised.W/830610 Ltr ML20023D9691983-05-27027 May 1983 LER 83-014/03L-0:on 830428,relay B21-K2A Did Not Pick Up as Required on High Flow Signal.Caused by Sticking Plunger in Flow Meter & Faulty Capacitor in Flow Switch Circuit.Plunger Freed & Capacitor replaced.W/830527 Ltr ML20028A7021982-11-12012 November 1982 LER 82-071/03L-0:on 821024,suppression Pool Water Temp Recorder TR-4386B Found Inoperable.Caused by Random Failure of Pen 1 Motor.Motor Replaced & Recorder Returned to Svc ML20028A6861982-11-12012 November 1982 LER 82-074/03L-0:on 821101,control Rod Drive Scram Discharge Vol Valves V-18-07,V-18-08 & V-18-16 in Proper Position But Not Properly Locked.Caused by Lack of Procedural Guidance for Wrapping Locking Chain.Valves Locked ML20027B2651982-09-0808 September 1982 LER 82-051/03L-0:on 820809,reactor Core Isolation Cooling Steam Line High Pressure Differential Indicating Switch PDIS-2442 Tripped Out of Spec at 98 Inches of Water.Caused by Instrument Drift.Switch Recalibr & Tested ML20052H3051982-05-14014 May 1982 LER 82-030/03L-0:on 820421,HPCI Steam Supply Pressure Switch PS-2246A Setpoint Found Above Tech Spec Limit.Caused by Instrument Drift.Switch PS-2246A Recalibr & Tested ML20052H2821982-05-14014 May 1982 LER 82-029/03L-0:on 820419,during Normal Operation,Gate valve,MO-8401D,found to Have No Position Indication in Control Room & Could Not Be Operated from Control Room. Caused by Blown Control Fuse.Fuse Replaced ML20052G5311982-05-10010 May 1982 LER 82-028/03L-0:on 820410,during Cold Shutdown,While Removing Pipe Insulation to Access RHR Fill Line Valves for Maint,External Corrosion Found on RHR Fill Pump 1P-70 Min Flow Line.Caused by Moisture Retention by Pipe Insulation ML20052F0281982-05-0505 May 1982 LER 82-026/03L-0:on 820407,MSIV Leakage Control Sys (MSIV-LCS),pressure Switch PS-8404C Failed,Rendering Sys Inoperable.Caused by Corrosion on Terminal Strip.Terminal Strip Cleaned & Lubricated ML20052E9281982-05-0404 May 1982 LER 82-027/03L-0:on 820411 Drywell Pressure Switches PS-4310C & PS-4312C Tripped at 2.35 & 2.45 Psig, Respectively.Caused by Instrument Drift.Switches Recalibr & Tested ML20052E9131982-05-0303 May 1982 LER 82-025/03L-0:on 820404,suppression Chamber to Drywell Vacuum Breaker Valve CV-4327D Failed to Close Completely. Caused by Pneumatic Cylinder Piston Stuck in mid-position. Piston Lubed & Valve Tested Satisfactorily ML20052B2181982-04-23023 April 1982 Updated LER 79-021/01X-1:on 790918,during Surveillance Testing Min Flow Valve (MOV 2009) for Rgr (LPCI) Pumps 1P-229A & 1P-229C Failed to Open.Caused by Stripped Operator Worm Gear.Worm,Gear,Quad Rings & O Rings Replaced ML20052B3791982-04-23023 April 1982 Updated LER 80-054/01X-1:on 801110,during Plant Startup, Leaking Relief Valve PSV-4405 Stuck Open Causing Reactor Scram.Cause Unknown.Pilot Assembly Replaced ML20052B3921982-04-23023 April 1982 Updated LER 81-013/01T-1:on 810324,MSIVs 4412,4413,4416, 4419,4420 & 4421 Found to Have Seat Leakage on Inboard & Seat & Stem Leakage on Outboard Valves Exceeding Tech Specs. Caused by Normal Wear.Valves Repaired as Needed & Retested ML20052B4251982-04-23023 April 1982 Updated LER 82-020/01X-2:on 820315,standby Diesel Generator 1G-21 Tripped During Surveillance Testing.Caused by Procedural Deficiency,Allowing Fuel Oil Filter Change W/O Filling & Venting Filter Casings.Maint Procedures Written ML20052B4411982-04-23023 April 1982 Updated LER 81-030/03L-1:on 810701,during Surveillance Testing,Torus Atmosphere Sampling Line Isolation Valve SV-8108A Would Not Close.Caused by Rust in Mechanical Portion of Solenoid.Solenoid Dismantled & Cleaned ML20050D4641982-04-0505 April 1982 Updated LER 82-020/01T-1:on 820315,standby Diesel Generator Tripped in Start Sequence While Performing Surveillance Testing.Caused by Procedural Deficiency Allowing Both Fuel Oil Filters to Be Changed W/O Filing & Renting Casings ML20050D5541982-04-0202 April 1982 LER 82-022/03L-0:on 820305,HPCI Declared Inoperable When Preliminary Design Review Did Not Confirm Loose Mounting Plate on Spring Can Hanger EBB-14-H8.Caused by Degraded Condition of Red Head Concrete Expansion Bolts ML20050D5121982-04-0101 April 1982 LER 82-021/03L-0:on 820302,during Normal Operation Surveillance Testing on Standby Gas Treatment Sys Charcoal Deluge Sys,A Train Found to Be Wet.Caused by Leaking Deluge Valve CV-5837 & Plugged Orifice in Drainline ML20050C4281982-03-29029 March 1982 LER 82-020/01T-0:on 820315,during Normal Operation,While Performing Surveillance Testing,Standby Diesel Generator 1G21 Tripped in Start Sequence.Caused by Procedural Deficiency.Procedures Rewritten ML20050A9401982-03-26026 March 1982 LER 82-019/03L-0:on 820225,during Surveillance Testing on Main Steam Line Tunnel Leak Detection Sys,Temp Switch TIS-4444 Failed to Operate.Caused by Faulty Capacitor in Power Supply.Sys Tested & Restored to Svc ML20042C2931982-03-23023 March 1982 LER 82-018/03L-0:on 820221,during Normal Operation, Supression Pool Level Transmitter LT-4363B Responded Erratically,Trending Downscale.Caused by Interference by RHR Repairs.Transmitter Removed from Svc,Pending Repairs ML20042B3411982-03-19019 March 1982 LER 82-014/03L-0:on 820219,during Normal Operation,A RHR Loop Declared Inoperable Due to Failed Snubber GBB-4-SS-211 & Hanger GBB-4-H10.Caused by Minor Damage & Pipe Movement on a Rhr.Snubber Replaced & Hanger Repaired ML20042B2591982-03-19019 March 1982 LER 82-017/01T-0:on 820307,during Surveillance Testing, Standby Filter Unit a for Control Bldg Ventilation Sys Discovered to Have Low Halogenated Hydrocarbon Removal Efficiency.Caused by Moisture in Charcoal Adsorber Bank ML20042B3811982-03-17017 March 1982 LER 82-016/03L-0:on 820215,control Bldg Ventilation Sys Exhaust Isolation Damper Failed to Close Completely.Caused by Corrosion of Damper Operator Cylinder Due to Humidity. New Actuator Will Be Installed.Humidity Problem Studied ML20042A5781982-03-11011 March 1982 LER 82-015/01T-0:on 820225,RHR Svc Water Valve MOV-1947 Failed to Close During Normal Operation.Caused by Wear of Valve Operator Stem Nut.Stem Nut MOV-1947 & Gaskets Replaced,Operator Lubricated & Limit Switches Reset ML20042A3431982-03-11011 March 1982 LER 82-013/01T-0:on 820220,RHR Sys B Snubber GBB-3-SS-235 Removed from Svc for Testing.Caused by Snubber Pipe Clamp Rotated Out of Position & Bent Snubber Extension.Pipe Clamp Repositioned,Extension Straightened & Snubber Replaced ML20041F1891982-03-0505 March 1982 LER 82-010/03L-0:on 820206,oxygen Analyzer B for Containment Atmosphere Dilution Sys Found Reading Upscale.Probably Caused by Corrosion on Contacts Due to Bad Connection Between Oxygen Analyzer Cell & Terminal Strip ML20041F1821982-03-0505 March 1982 LER 82-011/03L-0:on 820208,self-cleaning Strainer IS-85B on Suction Line to Screen Wash Pump B for River Water Supply Sys Became Plugged.Caused by Failed Strainer Shear Pin. Strainer Cleared.Baskets,Cap,Gearbox & Shear Pin Replaced ML20041F2181982-03-0505 March 1982 LER 82-012/03L-0:on 820208,during Surveillance Testing,Msiv Leakage Control Sys Bypass Valve MOV-8403C Failed to Close. Caused by Failed Auxiliary Switch on Motor Starter Contractor Coil Mfg by Allis Chalmers.Switch Replaced ML20041B7451982-02-19019 February 1982 LER 82-009/01T-0:on 820205,secondary Containment Integrity Violated by Inadvertently Opening Inner Railroad Airlock Personnel Door While Outer Reactor Bldg Door Was Open.Caused by Personnel Error W/Failed Solenoid Contributing ML20041B8811982-02-19019 February 1982 LER 82-008/03L-0:on 820121,LPCI Sys & RHR Svc Water Sys a Declared Inoperable Due to Piping Stress in Excess of Code Allowables.Cause Unknown.Snubber GBC-1-SS-56 & RHR Sys Valve Replaced ML20041B3911982-02-12012 February 1982 LER 82-004/03L-0:on 820115,drywell High Pressure Switch Ps 4315B Tripped out-of-spec.Caused by Instrument Drift. Switch Recalibr ML20041B2381982-02-12012 February 1982 LER 82-003/03L-0:on 820113,while Performing Surveillance Testing,Reactor Vessel Pressure Switch Ps 4529 Tripped Below Tech Spec Limit.Caused by Instrument Drift.Switch Recalibr ML20041B3751982-02-12012 February 1982 LER 82-005/03L-0:on 820114,torus Water Level Recorder Lr 4385 Found in Failed Downscale Condition.Caused by Excessive Heat Buildup in Recorder Cabinet Due to Poor Ventilation. Cabinet Being Kept Open Temporarily to Increase Cooling ML20041B2491982-02-12012 February 1982 LER 82-006/03L-0:on 820114,B Oxygen Analyzer for Containment Atmosphere Dilution Sys Found Inoperable W/Low Flow on Span & Zero Gas.Caused by Defective Procedures.Bypass Flow Adjusted.Procedures Will Be Revised ML20041B2541982-02-12012 February 1982 LER 82-007/01T-0:on 820204,reactor Core Isolation Cooling Injection Valve MOV 2512 Was Opened & Then Would Not Close. Caused by Motor Operator Circuit Breaker Close Contractor Coil Being Opened.Coil Replaced ML20041B4051982-02-11011 February 1982 LER 82-002/03L-0:on 820112,reactor Core Isolation Cooling Steam Line High Flow Pressure Differential Indicating Switches PDIS2441 & 2442 Tripped at 118 & 125 Inches of Water.Caused by Instrument Drift.Switches Recalibr ML20040G9301982-02-0505 February 1982 LER 82-001/03L-0:on 820108,subchannel B of Tis 4477 to Turbine Bldg Main Steam Line Leak Detection Sys Found W/ Nonconservative Trip Setting Greater than Tech Spec Limit. Caused by Instrument Drift.Tis 4477 Recalibr & Tested ML20040D4541982-01-22022 January 1982 LER 81-048/03L-0:on 811223,pressure Differential Switch Which Controls Reactor Bldg to Suppression Chamber Vacuum Breaker Cv 4305 Tripped at Out of Tech Spec Value.Caused by Instrument Drift.Switch Recalibr & Functionally Tested ML20039G0571982-01-0606 January 1982 LER 81-049/03L-0:on 811208,both Torus Level Indications Momentarily Out of Svc.Caused by Failure of Technicians to Obtain Shift Supervisor Authorization Prior to Starting Calibr Test.Instrument Calibr & Employee to Be Disciplined ML20039D4331981-12-22022 December 1981 LER 81-047/03L-0:on 811204,high Drywell Pressure Switch PS-4311B Trip Setpoint Found to Be Out of Tolerance.Caused by Instrument Drift.Switch Recalibr (Static-O-Ring Model 12N-AA5) ML20039D4531981-12-22022 December 1981 LER 81-044/03L-0:on 811124,secondary Containment Isolation Damper on Air Ejector Room Exhaust Duct to Offgas Stack Failed to Close Completely When Operating Air Secured to Protect Damper.Cause Unknown.Investigation Continuing ML20039C9571981-12-22022 December 1981 LER 81-043/01T-0:on 811208,negative 24-volt de-charger Was Putting Out Only 21 Volts.Cause Undetermined.During Trouble Shooting,Charger Resumed Normal Output ML20039D4461981-12-22022 December 1981 LER 81-045/03L-0:on 811124,control Bldg Ventilation Sys Exhaust Damper Failed to Close,Rendering a Control Room Standby Filter Unit Inoperable.Caused by Misalignment Between Do & Damper Shafts Due to Repair Procedure Defect ML20039D5031981-12-22022 December 1981 LER 81-046/03L-0:on 811201,control Bldg Ventilation Sys Exhaust Isolation Damper Failed to Close Rendering a Control Room Standby Filter Unit Inoperable.Caused by Misalignment of Damper Operator.Repair Procedure to Be Corrected 1993-07-09 Category:RO) MONTHYEARML20045H2411993-07-0909 July 1993
[Table view]LER 93-004-00:on 930611,while Performing EDG Operability Surveillance,Edg a Tripped Approx 3 After Initial Start Signal.Possibly Caused by Partially Latched Condition of Trip Mechanism.Latch Will Be reset.W/930709 Ltr ML20045D6451993-06-18018 June 1993 LER 92-013-01:on 920817,scram Setpoint Was Reduced Due to Induced Noise Signal Which Caused Automatic Scram to Occur. C/As:Installed Inductors in Affected Flow Transmitter circuits.W/930618 Ltr ML20045D5991993-06-18018 June 1993 LER 93-003-00:on 930525,primary Containment Isolation Sys Half Group III Isolation Occurred Due to Loss of Jumper to Terminal Continuity During Planned Maint.Automatic Actions Confirmed & Signal Received verified.W/930618 Ltr ML20024B0581983-06-22022 June 1983 LER 83-017/03L-0:on 830523,while Operating in Torus Cooling Mode,Pressure Differential Across RHR Svc Water Strainer 1S-90B Increased.Caused by Sheared Motor Coupling Shear Pins.Two Shear Pins installed.W/830622 Ltr ML20024A4611983-06-10010 June 1983 LER 83-021/01T-0:on 830527,containment H202 Analyzer Channel a Rendered Inoperable.Caused by Calibr Difficulties Due to Fouled Pressure Regulators Resulting from Sys Contamination. Tech Specs revised.W/830610 Ltr ML20023D9691983-05-27027 May 1983 LER 83-014/03L-0:on 830428,relay B21-K2A Did Not Pick Up as Required on High Flow Signal.Caused by Sticking Plunger in Flow Meter & Faulty Capacitor in Flow Switch Circuit.Plunger Freed & Capacitor replaced.W/830527 Ltr ML20028A7021982-11-12012 November 1982 LER 82-071/03L-0:on 821024,suppression Pool Water Temp Recorder TR-4386B Found Inoperable.Caused by Random Failure of Pen 1 Motor.Motor Replaced & Recorder Returned to Svc ML20028A6861982-11-12012 November 1982 LER 82-074/03L-0:on 821101,control Rod Drive Scram Discharge Vol Valves V-18-07,V-18-08 & V-18-16 in Proper Position But Not Properly Locked.Caused by Lack of Procedural Guidance for Wrapping Locking Chain.Valves Locked ML20027B2651982-09-0808 September 1982 LER 82-051/03L-0:on 820809,reactor Core Isolation Cooling Steam Line High Pressure Differential Indicating Switch PDIS-2442 Tripped Out of Spec at 98 Inches of Water.Caused by Instrument Drift.Switch Recalibr & Tested ML20052H3051982-05-14014 May 1982 LER 82-030/03L-0:on 820421,HPCI Steam Supply Pressure Switch PS-2246A Setpoint Found Above Tech Spec Limit.Caused by Instrument Drift.Switch PS-2246A Recalibr & Tested ML20052H2821982-05-14014 May 1982 LER 82-029/03L-0:on 820419,during Normal Operation,Gate valve,MO-8401D,found to Have No Position Indication in Control Room & Could Not Be Operated from Control Room. Caused by Blown Control Fuse.Fuse Replaced ML20052G5311982-05-10010 May 1982 LER 82-028/03L-0:on 820410,during Cold Shutdown,While Removing Pipe Insulation to Access RHR Fill Line Valves for Maint,External Corrosion Found on RHR Fill Pump 1P-70 Min Flow Line.Caused by Moisture Retention by Pipe Insulation ML20052F0281982-05-0505 May 1982 LER 82-026/03L-0:on 820407,MSIV Leakage Control Sys (MSIV-LCS),pressure Switch PS-8404C Failed,Rendering Sys Inoperable.Caused by Corrosion on Terminal Strip.Terminal Strip Cleaned & Lubricated ML20052E9281982-05-0404 May 1982 LER 82-027/03L-0:on 820411 Drywell Pressure Switches PS-4310C & PS-4312C Tripped at 2.35 & 2.45 Psig, Respectively.Caused by Instrument Drift.Switches Recalibr & Tested ML20052E9131982-05-0303 May 1982 LER 82-025/03L-0:on 820404,suppression Chamber to Drywell Vacuum Breaker Valve CV-4327D Failed to Close Completely. Caused by Pneumatic Cylinder Piston Stuck in mid-position. Piston Lubed & Valve Tested Satisfactorily ML20052B2181982-04-23023 April 1982 Updated LER 79-021/01X-1:on 790918,during Surveillance Testing Min Flow Valve (MOV 2009) for Rgr (LPCI) Pumps 1P-229A & 1P-229C Failed to Open.Caused by Stripped Operator Worm Gear.Worm,Gear,Quad Rings & O Rings Replaced ML20052B3791982-04-23023 April 1982 Updated LER 80-054/01X-1:on 801110,during Plant Startup, Leaking Relief Valve PSV-4405 Stuck Open Causing Reactor Scram.Cause Unknown.Pilot Assembly Replaced ML20052B3921982-04-23023 April 1982 Updated LER 81-013/01T-1:on 810324,MSIVs 4412,4413,4416, 4419,4420 & 4421 Found to Have Seat Leakage on Inboard & Seat & Stem Leakage on Outboard Valves Exceeding Tech Specs. Caused by Normal Wear.Valves Repaired as Needed & Retested ML20052B4251982-04-23023 April 1982 Updated LER 82-020/01X-2:on 820315,standby Diesel Generator 1G-21 Tripped During Surveillance Testing.Caused by Procedural Deficiency,Allowing Fuel Oil Filter Change W/O Filling & Venting Filter Casings.Maint Procedures Written ML20052B4411982-04-23023 April 1982 Updated LER 81-030/03L-1:on 810701,during Surveillance Testing,Torus Atmosphere Sampling Line Isolation Valve SV-8108A Would Not Close.Caused by Rust in Mechanical Portion of Solenoid.Solenoid Dismantled & Cleaned ML20050D4641982-04-0505 April 1982 Updated LER 82-020/01T-1:on 820315,standby Diesel Generator Tripped in Start Sequence While Performing Surveillance Testing.Caused by Procedural Deficiency Allowing Both Fuel Oil Filters to Be Changed W/O Filing & Renting Casings ML20050D5541982-04-0202 April 1982 LER 82-022/03L-0:on 820305,HPCI Declared Inoperable When Preliminary Design Review Did Not Confirm Loose Mounting Plate on Spring Can Hanger EBB-14-H8.Caused by Degraded Condition of Red Head Concrete Expansion Bolts ML20050D5121982-04-0101 April 1982 LER 82-021/03L-0:on 820302,during Normal Operation Surveillance Testing on Standby Gas Treatment Sys Charcoal Deluge Sys,A Train Found to Be Wet.Caused by Leaking Deluge Valve CV-5837 & Plugged Orifice in Drainline ML20050C4281982-03-29029 March 1982 LER 82-020/01T-0:on 820315,during Normal Operation,While Performing Surveillance Testing,Standby Diesel Generator 1G21 Tripped in Start Sequence.Caused by Procedural Deficiency.Procedures Rewritten ML20050A9401982-03-26026 March 1982 LER 82-019/03L-0:on 820225,during Surveillance Testing on Main Steam Line Tunnel Leak Detection Sys,Temp Switch TIS-4444 Failed to Operate.Caused by Faulty Capacitor in Power Supply.Sys Tested & Restored to Svc ML20042C2931982-03-23023 March 1982 LER 82-018/03L-0:on 820221,during Normal Operation, Supression Pool Level Transmitter LT-4363B Responded Erratically,Trending Downscale.Caused by Interference by RHR Repairs.Transmitter Removed from Svc,Pending Repairs ML20042B3411982-03-19019 March 1982 LER 82-014/03L-0:on 820219,during Normal Operation,A RHR Loop Declared Inoperable Due to Failed Snubber GBB-4-SS-211 & Hanger GBB-4-H10.Caused by Minor Damage & Pipe Movement on a Rhr.Snubber Replaced & Hanger Repaired ML20042B2591982-03-19019 March 1982 LER 82-017/01T-0:on 820307,during Surveillance Testing, Standby Filter Unit a for Control Bldg Ventilation Sys Discovered to Have Low Halogenated Hydrocarbon Removal Efficiency.Caused by Moisture in Charcoal Adsorber Bank ML20042B3811982-03-17017 March 1982 LER 82-016/03L-0:on 820215,control Bldg Ventilation Sys Exhaust Isolation Damper Failed to Close Completely.Caused by Corrosion of Damper Operator Cylinder Due to Humidity. New Actuator Will Be Installed.Humidity Problem Studied ML20042A5781982-03-11011 March 1982 LER 82-015/01T-0:on 820225,RHR Svc Water Valve MOV-1947 Failed to Close During Normal Operation.Caused by Wear of Valve Operator Stem Nut.Stem Nut MOV-1947 & Gaskets Replaced,Operator Lubricated & Limit Switches Reset ML20042A3431982-03-11011 March 1982 LER 82-013/01T-0:on 820220,RHR Sys B Snubber GBB-3-SS-235 Removed from Svc for Testing.Caused by Snubber Pipe Clamp Rotated Out of Position & Bent Snubber Extension.Pipe Clamp Repositioned,Extension Straightened & Snubber Replaced ML20041F1891982-03-0505 March 1982 LER 82-010/03L-0:on 820206,oxygen Analyzer B for Containment Atmosphere Dilution Sys Found Reading Upscale.Probably Caused by Corrosion on Contacts Due to Bad Connection Between Oxygen Analyzer Cell & Terminal Strip ML20041F1821982-03-0505 March 1982 LER 82-011/03L-0:on 820208,self-cleaning Strainer IS-85B on Suction Line to Screen Wash Pump B for River Water Supply Sys Became Plugged.Caused by Failed Strainer Shear Pin. Strainer Cleared.Baskets,Cap,Gearbox & Shear Pin Replaced ML20041F2181982-03-0505 March 1982 LER 82-012/03L-0:on 820208,during Surveillance Testing,Msiv Leakage Control Sys Bypass Valve MOV-8403C Failed to Close. Caused by Failed Auxiliary Switch on Motor Starter Contractor Coil Mfg by Allis Chalmers.Switch Replaced ML20041B7451982-02-19019 February 1982 LER 82-009/01T-0:on 820205,secondary Containment Integrity Violated by Inadvertently Opening Inner Railroad Airlock Personnel Door While Outer Reactor Bldg Door Was Open.Caused by Personnel Error W/Failed Solenoid Contributing ML20041B8811982-02-19019 February 1982 LER 82-008/03L-0:on 820121,LPCI Sys & RHR Svc Water Sys a Declared Inoperable Due to Piping Stress in Excess of Code Allowables.Cause Unknown.Snubber GBC-1-SS-56 & RHR Sys Valve Replaced ML20041B3911982-02-12012 February 1982 LER 82-004/03L-0:on 820115,drywell High Pressure Switch Ps 4315B Tripped out-of-spec.Caused by Instrument Drift. Switch Recalibr ML20041B2381982-02-12012 February 1982 LER 82-003/03L-0:on 820113,while Performing Surveillance Testing,Reactor Vessel Pressure Switch Ps 4529 Tripped Below Tech Spec Limit.Caused by Instrument Drift.Switch Recalibr ML20041B3751982-02-12012 February 1982 LER 82-005/03L-0:on 820114,torus Water Level Recorder Lr 4385 Found in Failed Downscale Condition.Caused by Excessive Heat Buildup in Recorder Cabinet Due to Poor Ventilation. Cabinet Being Kept Open Temporarily to Increase Cooling ML20041B2491982-02-12012 February 1982 LER 82-006/03L-0:on 820114,B Oxygen Analyzer for Containment Atmosphere Dilution Sys Found Inoperable W/Low Flow on Span & Zero Gas.Caused by Defective Procedures.Bypass Flow Adjusted.Procedures Will Be Revised ML20041B2541982-02-12012 February 1982 LER 82-007/01T-0:on 820204,reactor Core Isolation Cooling Injection Valve MOV 2512 Was Opened & Then Would Not Close. Caused by Motor Operator Circuit Breaker Close Contractor Coil Being Opened.Coil Replaced ML20041B4051982-02-11011 February 1982 LER 82-002/03L-0:on 820112,reactor Core Isolation Cooling Steam Line High Flow Pressure Differential Indicating Switches PDIS2441 & 2442 Tripped at 118 & 125 Inches of Water.Caused by Instrument Drift.Switches Recalibr ML20040G9301982-02-0505 February 1982 LER 82-001/03L-0:on 820108,subchannel B of Tis 4477 to Turbine Bldg Main Steam Line Leak Detection Sys Found W/ Nonconservative Trip Setting Greater than Tech Spec Limit. Caused by Instrument Drift.Tis 4477 Recalibr & Tested ML20040D4541982-01-22022 January 1982 LER 81-048/03L-0:on 811223,pressure Differential Switch Which Controls Reactor Bldg to Suppression Chamber Vacuum Breaker Cv 4305 Tripped at Out of Tech Spec Value.Caused by Instrument Drift.Switch Recalibr & Functionally Tested ML20039G0571982-01-0606 January 1982 LER 81-049/03L-0:on 811208,both Torus Level Indications Momentarily Out of Svc.Caused by Failure of Technicians to Obtain Shift Supervisor Authorization Prior to Starting Calibr Test.Instrument Calibr & Employee to Be Disciplined ML20039D4331981-12-22022 December 1981 LER 81-047/03L-0:on 811204,high Drywell Pressure Switch PS-4311B Trip Setpoint Found to Be Out of Tolerance.Caused by Instrument Drift.Switch Recalibr (Static-O-Ring Model 12N-AA5) ML20039D4531981-12-22022 December 1981 LER 81-044/03L-0:on 811124,secondary Containment Isolation Damper on Air Ejector Room Exhaust Duct to Offgas Stack Failed to Close Completely When Operating Air Secured to Protect Damper.Cause Unknown.Investigation Continuing ML20039C9571981-12-22022 December 1981 LER 81-043/01T-0:on 811208,negative 24-volt de-charger Was Putting Out Only 21 Volts.Cause Undetermined.During Trouble Shooting,Charger Resumed Normal Output ML20039D4461981-12-22022 December 1981 LER 81-045/03L-0:on 811124,control Bldg Ventilation Sys Exhaust Damper Failed to Close,Rendering a Control Room Standby Filter Unit Inoperable.Caused by Misalignment Between Do & Damper Shafts Due to Repair Procedure Defect ML20039D5031981-12-22022 December 1981 LER 81-046/03L-0:on 811201,control Bldg Ventilation Sys Exhaust Isolation Damper Failed to Close Rendering a Control Room Standby Filter Unit Inoperable.Caused by Misalignment of Damper Operator.Repair Procedure to Be Corrected 1993-07-09 Category:TEXT-SAFETY REPORT MONTHYEARML20217H8991999-10-18018 October 1999
[Table view]SER Approving Licensee Requests for Relief NDE-R001 (Part a & B),NDE-R027,NDE-028,NDE-R029,NDE-R030,NDE-R032 & NDE-R035. Relief Request NDE-036,denied & Relief Request NDE-R-034, Deemed Unnecessary NG-99-1415, Monthly Operating Rept for Sept 1999 for Daec.With1999-09-30030 September 1999 Monthly Operating Rept for Sept 1999 for Daec.With ML20212H2381999-09-22022 September 1999 Safety Evaluation Supporting Amend 228 to License DPR-49 NG-99-1226, Monthly Operating Rept for Aug 1999 for Duane Arnold Energy Center.With1999-08-31031 August 1999 Monthly Operating Rept for Aug 1999 for Duane Arnold Energy Center.With NG-99-1115, Monthly Operating Rept for July 1999 for Daec.With1999-07-31031 July 1999 Monthly Operating Rept for July 1999 for Daec.With NG-99-0963, Monthly Operating Rept for June 1999 for Daec.With1999-06-30030 June 1999 Monthly Operating Rept for June 1999 for Daec.With ML20195G9901999-06-0909 June 1999 Safety Evaluation Supporting Amend 227 to License DPR-49 NG-99-0835, Monthly Operating Rept for May 1999 for Daec.With1999-05-31031 May 1999 Monthly Operating Rept for May 1999 for Daec.With ML20206N7551999-05-13013 May 1999 Safety Evaluation Accepting GL 95-07, Pressure Locking & Thermal Binding of Safey-Related Power-Operated Gate Valves NG-99-0682, Monthly Operating Rept for Apr 1999 for Duane Arnold Energy Center.With1999-04-30030 April 1999 Monthly Operating Rept for Apr 1999 for Duane Arnold Energy Center.With NG-99-0530, Monthly Operating Rept for Mar 1999 for Daec.With1999-03-31031 March 1999 Monthly Operating Rept for Mar 1999 for Daec.With ML20207G0251999-03-0303 March 1999 SER Concluding That Licensee Established Acceptable Program to Verify Periodically design-basis Capability of safety- Related MOVs at Duane Arnold & That Licensee Adequately Addressed Actions Requested in GL 96-05 NG-99-0330, Monthly Operating Rept for Feb 1999 for Daec.With1999-02-28028 February 1999 Monthly Operating Rept for Feb 1999 for Daec.With ML20202B4311999-01-26026 January 1999 Safety Evaluation Accepting Request for Approval to Use ASME Code Case N-508-1 in ISI Program for Duane Arnold Energy Ctr ML20202B3851999-01-26026 January 1999 Safety Evaluation Addressing Thermo-Lag Related Ampacity Derating Issues.Ampacity Derating Analysis Results Acceptable NG-99-0020, Monthly Operating Rept for Dec 1998 for Daec.With1998-12-31031 December 1998 Monthly Operating Rept for Dec 1998 for Daec.With ML20206N3211998-12-0707 December 1998 Final Part 21 Rept Re Piston Failure of MSIV Actuator at Daec.Rept Indicates That No Reportable Defect Exists,Per 10CFR21 NG-98-2010, Monthly Operating Rept for Nov 1998 for Daec.With1998-11-30030 November 1998 Monthly Operating Rept for Nov 1998 for Daec.With ML20196F9571998-11-24024 November 1998 Rev 20 to QA Program Description,Ufsar 17.2 for Daec NG-98-1875, Monthly Operating Rept for Oct 1998 for Daec.With1998-10-31031 October 1998 Monthly Operating Rept for Oct 1998 for Daec.With NG-98-1717, Monthly Operating Rept for Sept 1998 for Daec.With1998-09-30030 September 1998 Monthly Operating Rept for Sept 1998 for Daec.With NG-98-1767, Cyclic Rept of Facility Changes,Tests & Experiments,Fire Plan & Commitment Changes,For Period from 970301-980930. with1998-09-30030 September 1998 Cyclic Rept of Facility Changes,Tests & Experiments,Fire Plan & Commitment Changes,For Period from 970301-980930. with ML17354B0971998-09-0909 September 1998 Part 21 Rept Re Possible Machining Defect in Certain One Inch Stainless Steel Swagelok Front Ferrules,Part Number SS-1613-1.Caused by Tubing Slipping Out of Fitting at Three Times Working Pressure of Tubing.Notified Affected Utils ML20153B4141998-08-31031 August 1998 Monthly Operating Rept for Aug 1998 for DAEC NG-98-1389, Monthly Operating Rept for July 1998 for DAEC1998-07-31031 July 1998 Monthly Operating Rept for July 1998 for DAEC ML20236X5321998-07-29029 July 1998 Safety Evaluation Re USI A-46 Program Implementation for Plant ML20236W0021998-07-29029 July 1998 Safety Evaluation Accepting Request for Relief NDE-R020 Re Third 10-yr ISI Interval of Plant,Per 10CFR50.55a(a)(3(i) ML20236S2541998-07-14014 July 1998 Special Rept 98-01:on 980629,diesel-driven Fire Pump Was Inoperable for Greater than Seven Days.Caused by Sheared Off Tie Rods on Accessory Drive End of Engine.Evaluated Condition,Procured Parts & Replaced Tie Rods ML20236R3251998-06-30030 June 1998 Monthly Operating Rept for June 1998 for DAEC ML20249B5171998-05-31031 May 1998 Monthly Operating Rept for May 1998 for DAEC ML20247P5651998-05-18018 May 1998 Part 21 Rept Re Model SA-A101 MSIV A' Actuator Showing Evidence of Internal Leakage,In Both Directions Past Pneumatic Piston.Situation Being Reviewed to Determine If Failure Could Pose Substantial Safety Hazard ML20247K1881998-05-0808 May 1998 Rev 0 to Cycle 16 COLR, for May 1998 ML20247H9381998-04-30030 April 1998 Monthly Operating Rept for Apr 1998 for DAEC ML20216J9171998-04-16016 April 1998 Safety Evaluation Accepting Relief Request MC-R001 for First 10-yr Interval of Containment Insp Program Per 10CFR50.55a (a)(3)(ii),per 971219 Request ML20217K7251998-04-16016 April 1998 Correction to SE of Relief Request MC-R001 Re Qualification Requirements for non-destructive Exam Personnel Performing Containment Insp ML20217K0471998-04-0101 April 1998 Safety Evaluation Authorizing Proposed Alternative in Relief Request NDE-R004 for Plant Third 10-yr ISI Interval,Based on Finding That Compliance W/Code Would Result in Hardship W/O Compensating Increase in Level of Quality & Safety ML20217H8831998-04-0101 April 1998 Safety Evaluation Supporting Request for Relief for Third ISI Program NG-98-0650, Monthly Operating Rept for Mar 1998 for Duane Arnold Energy Center1998-03-31031 March 1998 Monthly Operating Rept for Mar 1998 for Duane Arnold Energy Center ML20216F6791998-03-31031 March 1998 Monthly Operating Rept for Mar 1998 for DAEC ML20217F8841998-03-23023 March 1998 Safety Evaluation Accepting Third 10-yr Inservice Insp Interval Program Plan Requests for Relief for Plant NG-98-0398, Monthly Operating Rept for Feb 1998 for DAEC1998-02-28028 February 1998 Monthly Operating Rept for Feb 1998 for DAEC NG-98-0252, Monthly Operating Rept for Jan 1998 for Duane Arnold Energy Center1998-01-31031 January 1998 Monthly Operating Rept for Jan 1998 for Duane Arnold Energy Center ML20199L3481998-01-31031 January 1998 Rev 0 to Duane Arnold Energy Ctr Emergency Action Level (EAL) Technical Basis Document ML20249B3331997-12-31031 December 1997 1997 Annual Rept for Alliant Corporation ML20249B3391997-12-31031 December 1997 Central Iowa Power Coopertive 1997 Annual Rept ML20249B3351997-12-31031 December 1997 1997 Annual Rept for Corn Belt Power Cooperative NG-98-0017, Monthly Operating Rept for Dec 1997 for Duane Arnold Energy Center1997-12-31031 December 1997 Monthly Operating Rept for Dec 1997 for Duane Arnold Energy Center NG-97-2118, Monthly Operating Rept for Nov 1997 for DAEC1997-11-30030 November 1997 Monthly Operating Rept for Nov 1997 for DAEC ML20199J6841997-11-21021 November 1997 SER Approving Relief Requests to Second 10-year Inservice Inspection Interval for Duane Arnold Energy Center NG-97-1959, Monthly Operating Rept for Oct 1997 for DAEC1997-10-31031 October 1997 Monthly Operating Rept for Oct 1997 for DAEC 1999-09-30 |
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