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| Issue date | Title | Topic | |
|---|---|---|---|
| ML20132C075 | 13 December 1996 | Part 21 Rept Re Testing of Six HFD3045 & HFD3060 Molded Case Circuit Breakers w/125 Volt DC Shunt Trip Devices.Identified Incorrectly Installed DC Shunt Trip Units & Are in Process of Being Returned to Vendor | |
| ML20126J596 | 31 December 1992 | Part 21 Rept Re Potential Loss of RHR Cooling During Nozzle Dam Removal.Nozzle Dams May Create Trapped Air Column Behind Cold Leg Nozzle Dam.Mod to Nozzle Dams Currently Underway. Ltrs to Affected Utils Encl | Hydrostatic |
| ML20127P586 | 23 November 1992 | Followup to 921005 Part 21 Rept Re Potential Defect in SB/SBD-1 Housing Cover Screws.Procedure Re Replacement of SBD-1 Spring Cover Bolts Encl.All Fasteners Should Be Loosened & Removed.List of Affected Utils Encl | |
| ML20070A686 | 17 January 1991 | Part 21 Rept Re Failure of 4.16 Kv vertical-lift Switchgear Cell Mounted,Auxiliary Contacts to Operate on Demand During Testing of Auxiliary Standby Switchgear at Facility. Initially Reported on 901101.New Test Link Sent to Facility | |
| ML20062D935 | 1 November 1990 | Part 21 Rept Re Failure of 4.16 Kv Vertical Lift Switchgear, cell-mounted Auxiliary Contacts to Operate on Command During Testing of Standby Switchgear at Plant.Caused When Maladjusted Test Link Inserted Between Breaker & Switch | |
| ML17223A745 | 26 January 1990 | Part 21 Rept Re Backup Rings Furnished in Spare Parts Seal Kits & in 25 Gpm 4 Way Valves as Part of Actuators Made of Incorrect Matl.Rings Should Be Viton & Have Been Identified as Buna N | |
| ML20246N791 | 10 May 1989 | Part 21 Rept Re Room Cooler Vents & Drains Mfg by Carrier Corp Per Bechtel Specs,W/Galvanic Corrosion at Interface w/90-10 copper-nickel Room Cooler Supply & Return Headers. Vents & Drains Will Be Modified During Current Outage | |
| ML20234C735 | 23 June 1987 | Supplemental Part 21 Rept Re Silicone Foam Seal Anomolies at Wolf Creek Generating Station | Fire Watch |
| 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 | |
| ML20153D886 | 17 February 1986 | Part 21 Rept Re Failure of Penetration & Conduit Seal Configurations During Fire Tests.Initially Reported on 860214.Evaluation of Number & Location of Defective Seals in Progress.Nrc Assistance Requested | Fire Barrier |
| 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 |
| ML20137W261 | 30 September 1985 | Update to Part 21 Rept Re Insp for Cracked Welds Discovered in Generator Brackets.Insp for Callaway Unit 1 Postponed Until Next Refueling Outage (Probably Apr 1986).No Cracks Discovered During Insp at Wolf Creek | |
| ML20135E116 | 5 September 1985 | Part 21 Rept Re Use of Connectron non-IEEE Qualified Matl in Spare Part Terminal Blocks Supplied to Facilities. Appropriate Customers Notified.Terminal Blocks Should Be Reviewed to Identify Defective Matl | |
| ML20135G065 | 28 August 1985 | Supplemental Part 21 & Deficiency Rept U-70 Re Failures of Crane-Deming Keepwarm Lube Oil Pumps.Initially Reported on 840328.Permanent ASME Section III Equivalent Pumps Will Be Installed on Engine Skid by First Refueling | |
| ML20135D448 | 15 August 1985 | Part 21 Rept Re Raychem auto-trace 20PTV1 self-regulating Electric Heat Tracers & Associated Derivatives.Licensees Advised of Problem & Procedures to Determine Any Effect on Operation | |
| ML20210G992 | 13 August 1985 | Part 21 Rept Re Failure of Isolated Worm Shaft Gear When Certain Critical Speeds Combined W/Repetitive Transfer of Actuator Clutch Mechanism from Manual (Handwheel) to Motor Drive Mode.Two Possible Solutions Noted | |
| ML20129J738 | 24 June 1985 | Part 21 Rept Re Auto-Trace 20PTV1,self-regulating Electric Heat Trace,W/Lower than Specified Power Output.Deficiency Could Result in Lower Maint Temp in Electric Pipe Heating Sys.Affected Licensees Identified | |
| ML20116E848 | 23 April 1985 | Part 21 Rept Forwarding Rev 1 to Insp Procedure for Investigating Emergency Diesel Generators for Fractured Welds on Air Deflectors.Rev Will Be Forwarded to Each Facility | |
| ML20116D320 | 22 April 1985 | Part 21 Rept Re Ruskin Mfg Co Welds Used to Join Damper to Damper & Damper Section to Mullion Plates.Welds Not in Accordance W/Approved Design Drawings.Drawing 5415 Revised to Indicate Weld Spacing.Drawing of Weld Spacing Encl | |
| ML20115J136 | 15 April 1985 | Forwards Insp Procedure for Investigating Emergency Diesel Generators for Fractured or Cracked Welds to Determine If Part 21 Problem Exists,Per Jg Borman | |
| ML20100E065 | 29 March 1985 | Part 21 Rept Re Series of Cracked Welds Discovered in Generators.Welds Occurred in Conical Baffle Section of Coil Guards.All Units Will Be Inspected.Affected Plants Listed | |
| NRC-85-3024, Part 21 Rept Re Possible Undetectable Failures in ESF Actuation Sys.Initially Reported on 791107.Possibility of Undetectable Failures Remain Under Certain Circumstances Despite Change in Hardware | 22 March 1985 | Part 21 Rept Re Possible Undetectable Failures in ESF Actuation Sys.Initially Reported on 791107.Possibility of Undetectable Failures Remain Under Certain Circumstances Despite Change in Hardware | |
| ML20113A429 | 11 January 1985 | Part 21 Rept Re Incorrect Insulating Tape.Instructions Governing Handling of Incoming Matls Fully Adequate & If Followed,Would Have Prevented Error | |
| ML20133N931 | 28 September 1984 | Final Deficiency Rept SDR 83-08 Re Seismic Chatter of Ntc Card Relay Used in Westinghouse 7300 Process Protection Sys. Initially Reported on 840124.Bypass Mod Will Be Installed. Westinghouse Continues to Pursue Solution Re Ntc Card | |
| ST-HL-AE-1141, Part 21 Rept Re Capacitor Terminations Used in GE ferro- Resonant Transformers Utilized in Westinghouse Vital 7.5 Kva Inverters.Initially Reported on 840913.Technical Bulletin Issued W/Instructions for Proper Connection of Capacitors | 14 September 1984 | Part 21 Rept Re Capacitor Terminations Used in GE ferro- Resonant Transformers Utilized in Westinghouse Vital 7.5 Kva Inverters.Initially Reported on 840913.Technical Bulletin Issued W/Instructions for Proper Connection of Capacitors | |
| ML20098D994 | 12 September 1984 | Supplemental Deficiency & Part 21 Rept U-70 Re Failures of Crane-Deming Model 1549 Positive Displacement Gear Pumps Used as Keepwarm Lube Oil Pumps on Emergency Diesel Generators.Design Change to Keepwarm Pumps Initiated | Safe Shutdown |
| ML20093N472 | 20 July 1984 | Supplemental Final Deficiency Rept Re Generic Defects in Gould/Rundel 4-position & 2-position Selector Switches Failure.Initially Reported on 840209.Failed Units to Be Replaced from Alternate Supplier | |
| ML20094A470 | 20 July 1984 | Interim Significant Deficiency Rept SDR 84-04 Re Limitorque Operator Motor Pinion/Worm Shaft Clutch Gear Failure. Limitorque Will Conduct Cycle Testing & Westinghouse Will Conduct Metallurgical Tests.Next Rept Expected by 840930 | |
| ML20093F827 | 2 July 1984 | Amend to Final Deficiency Rept U-72 Re Silicone Foam Penetration Seals.Actions Meet Intent of Fire Protection Program & Do Not Diminish Effectiveness of Seals | Fire Protection Program |
| ML20092H664 | 14 June 1984 | Supplemental Part 21 Rept Re Possible Exhaust Valve Cage Holddown Undertorquing.Torque Values Adequate.Unit Free of Reported Defects | |
| ML20091L645 | 1 June 1984 | Interim Significant Deficiency Rept SDR 84-04 Re Limitorque SB-2-80 Actuators Susceptability to Gear Damage.Initially Reported on 840419.Actuators to Be Replaced W/Fully Qualified SB-1-60 Actuators | |
| ML20091H906 | 26 May 1984 | Supplemental Final Deficiency & Part 21 Rept U-70 Re Failure of Crane-Deming Emergency Diesel Generator Keepwarm Lube Oil Pump PKJ03B.Initially Reported on 840118.Pump Failures Due to Insufficient Operating Clearances | Safe Shutdown |
| ML20091A641 | 22 May 1984 | Final Deficiency & Part 21 Rept U-82 Re Use of Terminal Blocks of Indeterminate Qualification Status in Limitorque Actuators.Initially Reported on 840521.Questionable Terminal Blocks Replaced | |
| ML20091J359 | 17 May 1984 | Final Deficiency & Part 21 Repts U-64 Re Limitorque Operator Motor Pinion/Worm Shaft Clutch Gear Failure.Initially Reported on 831017.Caused by Improperly Installed Motor Pinion Gears.Gear Failures May Also Impact Wolf Creek | |
| ML20084P466 | 11 May 1984 | Final Deficiency Rept U-75 Re Potential Essential Svc Water Pump Degradation.Item Not Reportable as Significant Deficiency Under 10CFR50.55(e).Rept Withdrawn | |
| ML20084P532 | 11 May 1984 | Final Deficiency Rept U-78 Re Failure of Chemetron Check Valve Spring Seat During Halon Fire Protection Sys Discharge Testing.Reworked Check Valves,W/Upgraded Spring Seat, Installed in All Halon Sys | |
| ML20084Q092 | 10 May 1984 | Supplemental Part 21 & Deficiency Rept SDR 84-02 Re Improperly Rated Field Run Cables Connecting Valcor Solenoid Valves.Followup Investigation Identified Similar Deficiencies in Target Rock & Asco Solenoids | |
| ML20084Q391 | 9 May 1984 | Final Significant Deficiency Rept SDR 84-05 Re Potential for Valve Operator Motor Pinion Gear Key Failure Due to Improper Matls in Certain Limitorque Motor Operators.Initially Reported on 840418.All Affected Gear Keys Replaced | |
| ML20084L115 | 8 May 1984 | Suppl 1 to Part 21 Rept Re United Electric Controls Fuel Oil Filter Differential Pressure Switches at Shoreham Plant. Switch Also Provided to Listed Plants.Corrective Actions Defined in 840328 Rept Will Be Applied | |
| ML20084M063 | 7 May 1984 | Interim Significant Deficiency Rept U-71 Re Induction of Exhaust Gases Into Control Room.Util Accepts Bechtel Conclusion That Issue Not Reportable Per 10CFR50.55(e).Addl Monitors Will Be Installed to Add Level of Conservatism | |
| ML20084K157 | 1 May 1984 | Final Deficiency Rept SDR 83-08 Re Seismic Chatter of Ntc Card Relay in Westinghouse 7,300 Process Protection Sys. Util Will Have Option to Install Replacement Relay Once Relay Developed | |
| ML20084M030 | 1 May 1984 | Supplemental Deficiency Rept SDR 83-13 Re Limitorque Valve Operator Limit Switch Rotor Matl.Util Will Install Fibrite Rotors in Class IE Valve Before Declaring Valve Operational for Particular Mode | |
| ML20084A597 | 20 April 1984 | Supplemental Final Part 21 & Final Deficiency Rept U-80 Re Failure of Containment Cooling Fans to Remain in Safeguards Position Following Safety Injection Signal Reset.Initially Reported on 840403.Circuit Modified | |
| ML20084C301 | 18 April 1984 | Amended Final Deficiency Rept U-72 Re Silicone Foam Penetration Seal Installation & Insp.All Seals Will Not Be Completed by 840422.Fire Watch Will Be Established at Time of Fuel Load | Fire Barrier Continuous fire watch Fire Protection Program Fire Watch Hourly Fire Watch |
| ML20084C237 | 13 April 1984 | Final Part 21 & Deficiency Rept U-66 Re Gould Containment Cooling Fan Starter Coil Failure.Initially Reported on 831123.Caused by Overvoltage of 130-volt Diode Incorporated in Coils.Diodes Replaced w/150-volt Diode | |
| ML20084B022 | 13 April 1984 | Final Deficiency Rept SDR 84-02 Re Field Run Cables for Solenoid Valves.Initially Reported on 840315.Design Changes Implemented to Replace Field Wiring W/Qualified High Temp Wiring w/392 F Rated Insulation.Also Reported Per Part 21 | |
| NRC-84-0064, Significant Deficiency Rept 84-03 Re Failures in Control Devices in RCS Porvs.Initially Reported on 840302.Design Change Package Issued to Incorporate 15 Amp Fuses Into PORV Control Circuit & to Add Dc Contactor | 13 April 1984 | Significant Deficiency Rept 84-03 Re Failures in Control Devices in RCS Porvs.Initially Reported on 840302.Design Change Package Issued to Incorporate 15 Amp Fuses Into PORV Control Circuit & to Add Dc Contactor | Power Operated Valves |
| NRC-84-0067, Supplemental Deficiency Rept 84-01 Re Gould/Rundel Selector Switch Failures.Initially Reported on 840316.Failed Switches Returned to Gould.Caution Flyers & QC Sheets Will Be Supplied W/Future Shipments | 13 April 1984 | Supplemental Deficiency Rept 84-01 Re Gould/Rundel Selector Switch Failures.Initially Reported on 840316.Failed Switches Returned to Gould.Caution Flyers & QC Sheets Will Be Supplied W/Future Shipments | Overtravel |
| ML20083P567 | 13 April 1984 | Final Significant Deficiency Rept 84-03 Re Failures in Control Devices in RCS Porvs.Initially Reported on 840302. Design Mods Developed to Correct Problem & Design Drawings Revised to Reflect Mods | Power Operated Valves |
| ML20084B463 | 13 April 1984 | Final Deficiency Rept Re Field Run Cables for Valcor Solenoid Valves.Initially Reported on 840315.Design Changes Implemented to Replace Field Wiring W/Qualified High Temp Wiring.Also Reported by Bechtel Per Part 21 |