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| Issue date | Title | Topic | |
|---|---|---|---|
| FVY-86-105, Part 21 Rept Re Design Defect Relating to Limitorque Motor Operators Mfg Prior to 1975.Mfg Contacted & Retrofit Kits Installed on safety-related & nonsafety-related Operators. Addl Info Encl | 10 November 1986 | Part 21 Rept Re Design Defect Relating to Limitorque Motor Operators Mfg Prior to 1975.Mfg Contacted & Retrofit Kits Installed on safety-related & nonsafety-related Operators. Addl Info Encl | |
| L-75-474, Interim Deficiency Rept Re Leaking Field Welds on Lines. Investigation Still in Progress.Next Rept Expected by 751031 | 3 October 1975 | Interim Deficiency Rept Re Leaking Field Welds on Lines. Investigation Still in Progress.Next Rept Expected by 751031 | |
| ML17261A530 | 18 June 1987 | Part 21 Rept Re Potential Util Failure to Comply W/Component Containment Isolation Licensing Commitment If Proposed Mods to Component Cooling Water Sys Instituted.Utils Advised to Evaluate Containment Isolation Sys | |
| ML17264A938 | 10 July 1997 | Deficiency Rept Re Potential Safety Hazard Associated w/FM-Alco 251 Engin,High Pressure Fuel tube-catalog: 4401031-2 in Which Dual Failure Mode Exists.Caused by Incorrect Forming Process | |
| ML17340B143 | 31 March 1981 | Part 21 Rept Re Review of All Deficiency Repts Submitted to NRC for 770810-800731.Forwards LERs Determined Reportable Under 10CFR21 | |
| ML17347A751 | 2 May 1988 | Part 21 Rept Re Component Cooling Water Sys Containment Isolation Function.Addl Evaluation of Issue in Progress as Part of Util Design Basis Effort.Ltr Sent as Formal Followup to Feb 1988 Discussion | |
| ML17348A162 | 27 March 1990 | Part 21 Rept Re Matls W/Programmatic Defects Supplied by Dubose Steel,Inc.Customers,Purchase Order,Items & Affected Heat Numbers Listed | |
| ML17348B043 | 16 August 1991 | Part 21 Rept Re Potential Generic Component Defect Found During Insp of Asea/Abb Type RXMH2,Model RK223068-EA & RK223069-EA Relays.Caused by Misplacement of Insulating Tape Installed on Coil Termination | |
| ML17348B292 | 12 August 1991 | Part 21 Rept Re Potential Generic Component Defect in Asea/Abb Type RXMH2 Relays.Relays Utilized in Emergency Diesel Generator Bus Load Sequences.Info Gathering Underway. Customers Will Be Notified as Soon as Possible | |
| ML17348B305 | 12 December 1991 | Supplement to 910812 Part 21 Rept Re Potential Generic Defects in Abb Type RHMH2 Model RK223068-EA & 069-EA Relays. Caused by Tape Fold Back Condition.New Method for Installing Insulation Tape Initiated | |
| ML17348B441 | 23 March 1992 | Interim Part 21 Rept Re Westinghouse Reactor Vessel Head Adaptor Tube Cracking.Wog Approved Project Authorization on 920205 for Reactor Vessel Closure Head Penetration Alloy 600 Primary Water Stress Corrosion Cracking | |
| ML17352A895 | 15 November 1994 | Part 21 Rept Re Unit 3A Sequencers at Turkey Point Plant. Unless Contacted by FP&L to Perform Programming Changes & Subsequent V&V to Sequencer Software,United Controls Plans No Other Evaluation of Defect for Listed Reason | |
| ML17352B139 | 28 April 1995 | Part 21 Rept Re Mechanical Defect in Shaft Length of Some HEA63 Lockout Relays Mfg Between 1990-94.Defect Identified Could Possibly Result in Binding of Front Shaft.Suspect Relays Checked for Date Codes & Replacements Ordered | |
| ML17353A614 | 28 February 1996 | Part 21 Rept 10CFR21-0073 Re Defect W/Voltage Adjust Potentiometer Mfg by Chicago Telephone Supply Used on NEI Peebles (Portec) Voltage Regulators at Plant.Util Updating Voltage Regulators W/Maury Instrument Corp Potentiometer | |
| ML17354B097 | 9 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 | |
| ML18038A897 | 7 September 1994 | Part 21 Rept Re Defect in Latching Mechanism of Potter & Brumfield Relay on C&D High Voltage Shut Down Alarm Assembly Printed Circuit Boards.Pull Test on Relay Reset Button Incorporated Into Receiving Insp Procedures | |
| ML18079A952 | 28 October 1978 | Deficiency Rept:On 780928,during Routine Design Review, Undersizing of Refueling Water Storage Tank Was Discovered. Tank Storage Capacity Has Been Increased.Design Drawings for Tank Piping & Foundation Will Be Modified | |
| ML18081A375 | 5 October 1979 | Significant Deficiency Rept Re Containment Purge & pressure- Vacuum Relief Valves.Actuator Torque Values Were Insufficient to Move Valves from Open to Closed Positions W/ Design Differential Pressure of 60 Psi.Design Reviewed | |
| ML18081A378 | 5 October 1979 | Significant Deficiency Rept 79-06 Re Steam Generator Water Level Instrumentation.Pipe Breaks in Containment Could Lead to Elevated Temp Readings Which Could Result in Delayed Protection Sys Actuation.Setpoints to Be Changed | |
| ML18081A755 | 4 October 1979 | Interim Deficiency Rept Re Max Flow of RHR Pump During post- LOCA Mode.Caused by Low Sys Resistance to Pump Runout Conditions.Sys Resistance Increased by Placement of Resized Orifices | |
| ML18081B048 | 21 December 1979 | Final Deficiency Rept Re Undetectable Failure in Engineered Safety Features Actuation Sys.Testing Procedures Revised to Include Testing of Permissive Circuitry P4 on Periodic Basis.Unit Will Be Tested Prior to Operation | |
| ML18081B060 | 3 December 1979 | Initial Deficiency Rept Re Potential Dropped Rod Events Leading to Calculated DNB Ratios Lower than Reported to NRC for Certain Westinghouse Plants.Util Is Investigating Condition for Applicability to Facility | |
| ML18082A142 | 15 February 1980 | Final Deficiency Rept:Check Valve 2DR-7 Failed to Meet Applicable Seismic Class I Loading.Caused by Design Defect. Addl Support Will Be Completed by 800228 | |
| ML18093A472 | 23 October 1987 | Part 21 Rept Re Calibr Gas Leakage Problem in Exo-Sensors, Inc Containment Hydrogen Analyzer Sys.Caused by Design Deficiency Associated W/Calibr Gas Subassembly.Monitoring Program to Be Maintained for Period After Sys Mods | |
| ML18093A828 | 6 May 1988 | Part 21 & Deficiency Rept Re Asea Brown Boveri,Power Distribution,Inc Low Voltage K-Line Circuit Breakers. Efforts Underway to Define Quantity & Type of Component Parts That May Need to Be Replaced | |
| ML18094A442 | 16 May 1989 | Part 21 Rept Re Defect in Solid State Protection Sys. During Mods in Solid State Protection Sys Cabinets,Noted That Two Wires Became Dislodged from Circuit Board.Visual Insp & Complete Pull Test Performed | |
| ML18094B446 | 27 April 1990 | Part 21 Rept Re shaft-to-pinion Key Failures in Limitorque Actuators.Initially Reported on 900424.Caused by Reduction of cross-sectional Area & Ultimate Propagation of Cracks. Util Intends to Replace Keys in Actuators W/Keys of Steel | |
| ML18095A225 | 22 May 1990 | Part 21 Rept Re Insufficient Welds on Pedestal Support Alignment Lug & Slide Shoe for 11,12,21 & 22 Charging/Safety Injection Pumps.Initially Reported on 900516.Windows Cut in Support Pedestals to Gain Access to Affected Areas | |
| ML18095A232 | 24 May 1990 | Part 21 Rept Re Discrepancies Identified in ECCS Flow Orifice K Factors Supplied by Westinghouse.Initially Reported on 900518.Util Fabricated New Orifice Plates to Original Specs | Unanalyzed Condition |
| ML18095A403 | 2 August 1990 | Part 21 Rept Re MSIV Design Deficiency at Plant.Design Spec Provided by Westinghouse Did Not Specify Requirement to Provide Seal in Capability & Util Design Process Failed to Recognize Deficiency | |
| ML18096B242 | 1 February 1993 | Part 21 Rept Re Possible Matl Defect in Stainless Steel Swagelock Tube Fittings.Initially Reported on 921218.List of Part Numbers,Heat Codes & Addl Affected Customers Encl | |
| ML18100A768 | 13 December 1993 | Interim Part 21 Rept Re Discovery That Ge/Alco EDGs High Pressure Injection Tube Studs Did Not Meet Correct Matl non- Std & Not Correct Geometry.All Nonconforming Studs Identified & Replaced | |
| ML18100B191 | 30 June 1994 | Initial Part 21 Rept Re Deficiency in Signal Summators PM-505B & PM-506B Supplied by Westinghouse.Design Changes Implemented & Operators Made Aware of Affects of Power Supply Transient on Summator Operability | |
| ML18100B210 | 14 July 1994 | Deficiency Rept Re PORV Plug & Stem Material Defects. Initially Reported 940714.PORV Internals Were Replaced W/Plug Stellited | |
| ML18100B227 | 25 July 1994 | Part 21 Rept Re Cracking in Valve Stem & Plug Connection Pinning Collar Area on PORVs 1PR1 & 1PR2.Caused Attributed to Either IGSCC or Hydrogen Assisted Cracking.Porv Internals Replaced W/Internals Mfg from SS 316 Matl W/Plug Stellited | |
| ML18100B239 | 27 July 1994 | Part 21 Rept Re Signal Summators PM-505B & 506B Found to Saturate High When Summators Lose Power & Reenergized. Summators Powered from Independent Vital Instrument Buses & Inverters.Design Changes Implemented | |
| ML18101A861 | 1 August 1995 | Interim Part 21 Rept Re Velan Valve Corp Check Valve Failure to Close.Insp of Internals Showed Moderate Wear in Gap Between Valve Disc & Hanger Arm.New Disc Installed & Valve Tested Satisfactorily | |
| ML18101A877 | 4 August 1995 | Interim Part 21 Rept Re Potentially Reportable Deficiency in Edward Valve Model 838YT Check Valves Due to Disk Exhibiting Excessive Leakage.Disk from Original Valve Cleaned, Inspected & Installed in Replacement Valve | |
| ML18102A338 | 21 August 1996 | Part 21 Rept Re Chipping of Latching Mechanism Props Installed in GE 4 Kv magne-blast Circuit Breakers,Type AM-4.16-350-2H.Two Affected Breakers Have Been Returned to Vendor | |
| ML18102A370 | 6 September 1996 | Part 21 Rept Re Installation of NUS Model OCA 801 Signal Isolator Modules & Model Mth 801 Signal Summator Modules. Replacement Modules Including Spares for Plant,Unit 2 Have Been Inspected by Vendor & Repaired | Design basis earthquake |
| ML18102A559 | 8 August 1996 | Part 21 Rept Re Defect in NUS Model OCA801 Signal Isolator Modules.Replacement Modules Installed in Reactor Control & Protection Sys | Design basis earthquake |
| ML18106B044 | 29 January 1999 | Part 21 Rept Re Possible Defect in Swagelok Pipe Fitting Tee Part Number SS-6-T.Caused by Crack in Center of Forging. Continuing Analysis of Part & Will Provide Details in Acoordance with NRC Timetables | |
| ML18106B055 | 1 February 1999 | Part 21 Rept Re Possible Matl Defect in Swagelok Pipe Fitting Tee,Part Number SS-6-T.Defect Is Crack in Center of Forging.Analysis of Part Is Continuing & Further Details Will Be Provided IAW Ncr Timetables.Drawing of Part,Encl | |
| ML18106B093 | 25 February 1999 | Part 21 Rept Re Possible Defect in Swagelok Pipe Fitting Tee,Part Number SS-6-T.Caused by Crack Due to Improper Location of Heated Bar.Only One Part Out of 7396 Pieces in Forging Lot Was Found to Be Cracked.Affected Util,Notified | |
| ML18107A344 | 1 June 1999 | Interim Part 21 Rept Re Premature Over Voltage Protection Actuation in Circuit Specific Application in Dc Power Supply.Testing & Evaluation Activities Will Be Completed on 990716 | |
| ML19290B660 | 26 September 1979 | Interim Significant Deficiency Rept Re Weld Wire Documentation.Electrodes Used in post-weld Heat Treated Condition Were Not Properly Tested.Caused by Discrepancy in Procedures.Procedures Will Be Revised by 800118 | |
| ML19290E032 | 18 January 1980 | Second Interim Rept Re Pittsburgh Des Moines Use of 8018-C3 Weld Filler Metal.New Electrode Spec Issued,Welding Procedures Revised.Investigation Will Be Complete by 800314 | |
| ML19305C753 | 3 March 1980 | Interim Deficiency Rept Re Main Steam Pipe Spools.Ge Issued Instructions to Restore Affected Wall Thickness to Original GE Spec Requirement.Final Rept Will Be Submitted by 800321 | |
| ML19309G766 | 2 May 1980 | Potential Significant Deficiency Rept Re Discrepancy in Procurement of Weld Wire.Wire Used in post-weld,heat-treated Weldments Was Tested for Only as-welded Condition | |
| ML19316A243 | 23 February 1973 | Deficiency Rept Re Design &/Or Mfg of Undervoltage Trip Assemblies for Control Rod Drive Trip Breakers.Failures Noted 720913 & 730123.Vendors Informed |