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| Issue date | Title | Topic | |
|---|---|---|---|
| ML20217M021 | 20 September 1999 | Part 21 Rept Re Possible Deviation of NLI Dc Power Supply Over Voltage Protection Circuit Actuation.Caused by Electrical Circuit Conditions Unique to Remote Engine Panel. Travelled to Hope Creek to Witness Startup Sequence of DG | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| ML20202F686 | 26 January 1999 | Engine Sys,Inc Part 21 (10CFR21-0078) Rept Re Degradation of Synchrostat Model ESSB-4AT Speed Switches Resulting in Heat Related Damage to Power Supply Card Components.Caused by Incorrect Sized Resistor.Notification Sent to Customers | Reverse polarity |
| 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 | |
| ML20236N675 | 9 July 1998 | Part 21 & Deficiency Rept Re Notification of Potential Safety Hazard from Breakage of Cast Iron Suction Heads in Apkd Type Pumps.Caused by Migration of Suction Head Journal Sleeve Along Lower End of Pump Shaft.Will Inspect Pumps | |
| ML20217D570 | 20 March 1998 | Part 21 Rept 40 Re Governor Valve Stems Made of Inconel 718 Matl Which Caused Loss of Governor Control.Control Problems Have Been Traced to Valve Stems Mfg by Bw/Ip.Id of Carbon Spacer Should Be Increased to at Least .5005/.5010 | |
| ML20210E359 | 27 March 1997 | Part 21 Rept Re Sorrento Electronics Inc Has Determined Operation & Maint Manual May Not Adequately Define Requirements for Performing Periodic Surveillance of SR Applications.Caused by Hardware Failures.Revised RM-23A | |
| ML20096A402 | 28 December 1995 | Interim Part 21 Rept Failure of Scram Discharge Vol Drain Valve 1BFHV-F011.Possible Causes of Failure,Includes Spring mis-adjustment,change in Spring Adjuster Setting & Spring Relaxation.Further Investigation Ongoing | Scram Discharge Volume |
| ML20082S740 | 26 April 1995 | Part 21 Rept Re Hinge Arms Associated W/Sixteen Swing Check Valves Mfg by Anchor-Darling Valve Co | Anchor Darling |
| ML20081L770 | 29 March 1995 | Initial Part 21 Rept Re Anchor-Darling Check Valve Hinge Arms.Cs Pump B Discharge Check Valve Failed to Close in Nov 1994 Because Butt Stop on Hinge Arm Not of Sufficient Length.New Butt Stop Hinge Arm,Hinge Pin & Disc Installed | |
| ML20063M170 | 2 March 1994 | Part 21 Rept Clarifying & Supplementing Info Provided by Licensee Re Deficiency in Qualified Life Calculation for Microswitches Mfg by Comsip,Inc. Subj PTW-5300 Dc Indicators Supplied by Comsip,Inc,Mfg by Microswitch Corp | |
| ML20046C659 | 5 August 1993 | Part 21 Rept:On 930429,deficiency Identified Re Heat Damage to Comsip Series PTW-5300 Dc Powered Microswitches.Initially Reported on 930709.Safety-related Dc Microswitches Will Be Replaced Prior to 931230 | |
| ML20128H993 | 9 February 1993 | Interim Deficiency Rept Re Defect in Replacement EDG Fuel Oil Pumps Supplied by Colt Industries (Fairbanks Morse Engine Div).Initially Reported on 930111.Plugs & O-rings Repositioned.Vendor Requested to Perform Evaluation | Safe Shutdown |
| 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 | |
| ML20127K881 | 6 January 1993 | Part 21 Rept Re Engine Driven Fuel Oil Pump Being Returned for Proper Configuration Due to Portion of O Ring Missing from Plug | |
| ML20116L431 | 20 October 1992 | Followup to Part 21 Rept from Consolidating Power Supply, Inc Re Purchase & Procurement of 24-inch Flange at Facility Which Failed to Meet ASME Code Class III Requirements.Flange Purchased by Conex Pipe Sys,Inc.Investigation Underway | |
| ML20101L079 | 29 June 1992 | Final Part 21 Rept Re Defect in Assembly Process for Gh Bettis Containment Atmosphere Control Sys Valve Replacement Actuators.Initially Reported on 920529.Air Filter Installed in Compressor Main Air Line to Prevent Contamination | Loctite |
| ML20102B207 | 24 June 1992 | Part 21 Rept Re Cracking of Stellite 21 Hardfacing on Guide Nose of Poppets Supplied as Part of MSIV Leakage Improvement Mod.Initially Reported by Clei on 920522. Recommends That Liquid Penetrant Exam Be Performed | Liquid penetrant |
| ML20097D911 | 3 June 1992 | Part 21 Rept Re Design Defect in Degraded Grid Trip & Bus Transfer Scheme for Class IE Vital Busses Supplied by Bechtel Power Corp.Initially Reported on 920508.Design Change Package 4EC-3341 Issued & Implemented | |
| ML20097H158 | 29 May 1992 | Initial Part 21 Rept Re Failure of Gh Bettis Actuators Used at Plant.Gh Bettis Has Ordered Replacement SOVs & Pilot Valves for Installation at Butterfly Valve Mfg,C&S Valve | |
| ML20102B104 | 8 May 1992 | Part 21 Rept Re Defect Discovered in Degraded Grid Trip/Bus Transfer Scheme for Class IE Vital Bus Equipment.Time Delay of .7 Incorporated in Loading Scheme to Allow Loads to Drop Off of auto-swapped Class IE Buses | |
| ML20077N349 | 9 August 1991 | Part 21 Rept Re Potential for Malfunction of Filtration Recirculator Ventilation Sys Heater Control Panels at Plant Due to Excessive Heat Rise.Heater Control Panel Doors Removed | |
| ML20077J964 | 30 July 1991 | Interim Deficiency Rept Re Potential Deviation of Design Safety Function of Filtration Recirculator Ventilation Sys Heaters Controls Panels.Further Investigation Required to Determine If Defect Requires Notification,Per 10CFR21 | |
| ML19332C583 | 20 November 1989 | Part 21 Rept Re Misapplication of Magnetrol Level Switches Supplied by GE W/Hpci & RCIC Turbine Assemblies.Switches Declared Inoperable & Electrically Disconnected.Magnetrol Will Modify Spare Level Switch Assemblies | |
| ML20205F321 | 10 October 1988 | Part 21 Rept Re Potential Deviation from Tech Spec Concerning Ry Indicators Due to Operating Temp Effect on Analog Meter Movement.Initially Reported on 881006.Customers Verbally Notified on 881006-07 | |
| ML20215G244 | 16 June 1987 | Part 21 Rept Re Failure of Load Sequencing Equipment Supplied in Aug 1977 During Scheduled Testing.Caused by Open Electrical Connection on One Crimp Lug.Since 1978,insulated Lugs Used on All Equipment | |
| ML20211P721 | 23 February 1987 | Part 21 Rept Re Rockbestos Coaxial Cable Used in Sorrento Electronics Digital & Analog high-range Radiation Monitor. Insulation Resistance at High Temp Not High Enough for Ion Chamber & Associated Electronics to Operate Properly | |
| ML20210S335 | 4 February 1987 | Part 21 Rept Re Cracking in O-ring on Latch Mechanism on Contactors in Nuclear Exciters.Initially Reported on 861216. Sprecher & Schuh Changed O-ring Matl to Viton E60C. Contactors Will Be Returned to Vendor & Rebuilt | |
| ML20214E923 | 28 January 1987 | Part 21 Rept Re Incorrect Valve Stem Matl on Dragon Valves. Evaluation Underway.Owners or Architects/Engineers & NRC Will Be Notified of Results of Evaluation & Recommendations | |
| ML20215B968 | 26 September 1986 | Part 21 & Deficiency Rept Re Synchro-Start Type Essb Speed Switches.Initially Reported on 860822.Speed Switches Currently in Svc or Designated for Svc Will Be Tested for Relay Contact Closure & Relay Contact Condition | |
| ML20212N137 | 25 August 1986 | Part 21 Rept Re Potentially Defective Operation of Synchro-Start Products,Inc Synchronizing Speed Switches Used in Auxiliary Generating Equipment.Initally Reported on 860820.Next Rept Will Be Submitted by 860926 | |
| ML20211C618 | 9 June 1986 | Part 21 Rept Re Unknown Qualification of Yokogawa Type AB 40 Voltmeters & Ammeters Due to Unreported Design & Configuration Changes.Three Nuclear Plants Receiving 23 Items as Class 1E Spare Parts Notified.List of Users Encl | |
| ML20141E436 | 1 April 1986 | Final Significant Const Deficiency Rept Re Failure of Electrical Amplifier Assembly in Tobar Transmitters to Function During Irradiation Testing.Initially Reported on 860303.Seven Transmitters Will Be Replaced | |
| ML20141E441 | 1 April 1986 | Final Significant Const Deficiency Rept Re Anchor-Darling Testable Check Valves Not Opening/Closing Under Normal Operating Conditions.Initially Reported on 860305.Valves Modified to Improve Mechanism for Opening/Closing Disc | |
| ML20140J426 | 31 March 1986 | Part 21 Rept Re Nuclear Valves Shipped to Pse&G.Internal Parts Lapped Which Could Reduce or Eliminate Nickel Plating Resulting in Seat Leakage & Shifting Problems | |
| ML20210E003 | 17 March 1986 | Part 21 Rept Re Failure of Amplifiers at Hope Creek Plant During Gamma Radiation Testing.Initially Reported on 860314. Util Supplied W/List of Model 32 Transmitters Which Meet Criteria | |
| ML20199E916 | 7 March 1986 | Final Significant Const Deficiency Rept Re Overspeed Trip on Emergency Diesel Generator Mfg by Colt Industries.Initially Reported on 860213.All Colt-Pielstick PC-2 Engines Will Be Modified by 860415 | Safe Shutdown |
| ML20141N650 | 5 March 1986 | Final Deficiency Rept Re Environ Qualification of Tobar Pressure Transmitter Terminations.Initially Reported on 860205.Pressure Transmitters Reworked & Discrepancy & Startup Deviation Repts Issued | |
| ML20154H219 | 3 March 1986 | Part 21 & Deficiency Rept Re Tobar Model 32-2 Transmitters W/Steel,Not Polyester or Aluminum Amplifier Housings. Initially Reported on 860227.Preliminary Investigation Confirms Adequacy of Transmitters | |
| ML20141N701 | 26 February 1986 | Suppl to Final Significant Const Deficiency Rept Re Anchor/Darling Swing Check Valves.Eight Valves W/O Lock Welds Reworked | |
| ML20151Y814 | 4 February 1986 | Part 21 Rept Re Colt-Pielstick Engine Tripping Out on High Speed When Started for Test Purposes at Seabrook.Caused by Source of Air Pressure Staying On.Engines Will Be Modified to Positively Vent Air from Rack Boost Cylinder | Safe Shutdown Boric Acid Shutdown Margin Packing leak High Radiation Area Ultimate heat sink Fire Barrier Anticipated operational occurrence Hydrostatic Probabilistic Risk Assessment Operating Basis Earthquake Design basis earthquake Process Control Program Fuel cladding Pressure Boundary Leakage Grace period Power change Unidentified leakage |
| ML20137U846 | 3 February 1986 | Significant Const Deficiency Rept Re Inadequate Power to Tobar Pressure Transmitters.Initially Reported on 860115. Design Change Package (DCP-7153) Issued to Modify Power Supply Circuits | |
| ML20140A528 | 19 December 1985 | Part 21 Rept Forwarding Ltr Sent to Customers Re Check Valves Missing Lock Welds on Hinge Supports or Hinge Support Capscrews,Per 851121 Request.List of Customers Receiving Ltr Also Encl | |
| ML20137Z161 | 21 November 1985 | Final Part 21 & Significant Deficiency Rept Re Ruskin Mfg Co Spring Closure Fire Dampers.Initially Reported on 841224. Dampers Reworked & in-place Testing Program to Identify Limiting Airflow Conditions Implemented | Fire Barrier Exemption Request |
| ML20137S103 | 6 November 1985 | Final Part 21 & Significant Const Deficiency Rept Re Heat Buildup Inside Generator Control Cabinets.Initially Reported on 850403.Design Change Packages 570 & 7079 Implemented. Current Transformers Replaced | |
| ML20138K273 | 11 October 1985 | Final Part 21 & Const Deficiency Rept Re Missing Lock Welds on Anchor/Darling Swing Check Valves.Initially Reported on 850911.Set Screws Staked During Insp & Disc Nut Pins Peened as Alternative to Lock Welding | |
| ML20133N821 | 10 October 1985 | Final Const Deficiency Rept Re Misoperation of Bailey Controls Co 862 Sys Logic Module Logic Memories During Environ Qualification Testing.Initially Reported on 850909. Gap in Circuit Board Pads Increased & Area Cleaned |