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| Issue date | Title | Topic | |
|---|---|---|---|
| ML20207M923 | 12 March 1999 | Amended Part 21 Rept Re Cooper-Bessemer Ksv EDG Power Piston Failure.Total of 198 or More Pistons Have Been Measured at Seven Different Sites.All Potentially Defective Pistons Have Been Removed from Svc Based on Encl Results | |
| ML18066A277 | 13 August 1998 | Part 21 Rept Re Deficiency in CE Current Screening Methodology for Determining Limiting Fuel Assembly for Detailed PWR thermal-hydraulic Sa.Evaluations Were Performed for Affected Plants to Determine Effect of Deficiency | |
| LD-97-033, Part 21 Rept Re Defect in Potter & Brumfield Mdr Relays, Models 170-1 & 7032.Extended Problem to Include All Mdr Relay Models W/Date Codes 93XX-95XX.Root Cause Analysis, Written Rept & Recommended Corrective Actions Due by 971201 | 20 November 1997 | Part 21 Rept Re Defect in Potter & Brumfield Mdr Relays, Models 170-1 & 7032.Extended Problem to Include All Mdr Relay Models W/Date Codes 93XX-95XX.Root Cause Analysis, Written Rept & Recommended Corrective Actions Due by 971201 | |
| LD-97-028, Part 21 Rept Re Contamination of Lubricant Which Has Led to Hardening of Lubricant in Certain Potter & Brumfield Mdr Relay Models 170-1 & 7032.Will Distribute Copy of Rept to Utils Having ABB-CE Designed Nuclear Steam Supply Sys | 13 October 1997 | Part 21 Rept Re Contamination of Lubricant Which Has Led to Hardening of Lubricant in Certain Potter & Brumfield Mdr Relay Models 170-1 & 7032.Will Distribute Copy of Rept to Utils Having ABB-CE Designed Nuclear Steam Supply Sys | |
| LD-97-024, Part 21 Rept Re Error in Energy Redistribution Factor Used in LOCA Analysis for Listed Plants for Which ABB-CE Performed Analysis.Issued Recommendations Info Bulletin 97-004 | 14 August 1997 | Part 21 Rept Re Error in Energy Redistribution Factor Used in LOCA Analysis for Listed Plants for Which ABB-CE Performed Analysis.Issued Recommendations Info Bulletin 97-004 | |
| ML20140A966 | 29 May 1997 | Part 21 Rept Re Ksv Emergency Diesel Generator Power Piston Failure.Caused by Jacket Water in Combustion Chamber. Recommends That Users Verify That Crown Thickness at Valve Cutout Be 100 Minimum | Finite Element Analysis |
| 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 | |
| ML20137G626 | 25 March 1997 | Svcs Part 21 Rept Re Emergency Generators Installed at Zion Station Which Developed Significant Drop in Crankcase Lube Oil Level.Caused by Crack in Liner Wall,Allowing Jacket Water to Enter Chamber | Finite Element Analysis |
| ML18065B011 | 18 October 1996 | Part 21 Rept Re Application of Certain Aspects of ABB-CE Safety Analysis Methodology | |
| ML20117G464 | 14 May 1996 | Part 21 Rept Re Cooper Bessemer Reciprocating Products,Div of Cooper Cameron Corp,Issued Ltr to Define Utils/Plants Containing Similar Equipment as Supplied on Cooper Bessemer Ksv & Enterprise Dsr EDGs | |
| LD-96-009, Part 21 Rept Re Potential Instrumentation Decalibr at Low Power.Affected Utils Should Ensure That Log Power Channels Properly Calibr & cross-correlated to Linear Power Channels at 100% Reactor Power | 15 April 1996 | Part 21 Rept Re Potential Instrumentation Decalibr at Low Power.Affected Utils Should Ensure That Log Power Channels Properly Calibr & cross-correlated to Linear Power Channels at 100% Reactor Power | |
| ML20077D343 | 29 November 1994 | Part 21 Rept Re Suspect Master Connecting Rods & Contains Info Location in Engine for Rods | |
| ML20078G305 | 9 November 1994 | Rev to Part 21 Rept Re Potential Problem W/Master Power Connecting Rods.Vendor Recommends Listed Utils Perform Visual Insp of Master Rods to Determine Applicability of Rept | |
| ML20078C259 | 19 October 1994 | Part 21 Rept Re Valtek Valves Addressed in NRC Part 21 Log Number 93-325,installed at South Texas Project.Valtek re-designed Trim to Meet All Requirements & Built Parts to Retrofit in Valves | |
| LD-93-003, Part 21 Rept Re Defect in Potter & Brumfield Model 170-1 Relay.One of Two Rotor Return Springs Broke & Portion of Spring Lodged Between Rotor & Stator.Rotor Springs Supplied by Lewis Spring Co.Info Bulletin Being Prepared | 13 January 1993 | Part 21 Rept Re Defect in Potter & Brumfield Model 170-1 Relay.One of Two Rotor Return Springs Broke & Portion of Spring Lodged Between Rotor & Stator.Rotor Springs Supplied by Lewis Spring Co.Info Bulletin Being Prepared | |
| 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 |
| ML20125C716 | 7 December 1992 | Part 21 Rept Re Possibility for Malfunction of Declutching Mechanisms in SMB/SB-000 & SMB/SB/SBD-00 Actuators. Malfunction Only Occurs During Seismic Event.Balanced Levers May Be Purchased from Vendor.List of Affected Utils Encl | Stroke time Anchor Darling |
| 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 | |
| ML20106E195 | 2 November 1992 | Part 21 Rept Re Cracked Fuel Nozzle Tips Purchased from Bendic.Initially Reported on 910405.Addl Testing of Tips Performed Completed,Reviewed & Recommendation to Prevent Failures Made | |
| ML17306B058 | 8 October 1992 | Part 21 Rept Advising That Preliminary Evaluation of Rosemount Part 21 Notification Determined That Change in Systematic Static Pressure Span for Pressure Differential Transmitters May Result in Increase in Indicated Power | |
| ML17306A334 | 13 December 1991 | Followup Part 21 Rept Re Potential for Certain Westinghouse Products,Utilizing Dc Coil Assemblies,To Malfunction.Caused by Epoxy Compound Becoming semi-fluid During Svc.Initially Reported on 910624.Epoxy Check Will Be Incorporated | Overtravel |
| ST-HL-AE-3903, Suppl to Special Rept:On 901126,fuel Oil Leak Noted at Injection Pump 1L of Standby Diesel 23.Caused by Crack on Threaded Portion of Delivery Valve Holder.Injection Pump Delivery Valve & Valve Holder Replaced on 901127 | 4 November 1991 | Suppl to Special Rept:On 901126,fuel Oil Leak Noted at Injection Pump 1L of Standby Diesel 23.Caused by Crack on Threaded Portion of Delivery Valve Holder.Injection Pump Delivery Valve & Valve Holder Replaced on 901127 | |
| ML20086P159 | 31 October 1991 | Part 21 Rept Re Microscopic Cracks in Fuel Nozzle Tip from Mfg Lot D87001.Cracks Perpendicular to Axis of Nozzle & Extend Through Case Hardening & Stop at Core.Interim/Final Report Will Be Forwarded as Further Development Occurs | |
| ML20083D771 | 20 September 1991 | Interim Part 21 Rept Re Failure of Fuel Injector Nozzle Tips.Initially Reported on 910723.Each Util Will Continue to Monitor Exhaust Gas Temps During Monthly Runs & Will Sample Lube Oil on Quarterly Basis for Contamination | |
| ML17305B618 | 24 June 1991 | Part 21 Rept Re Potential for Certain Westinghouse-supplied Products,Utilizing Dc Coil Assemblies,To Malfunction. Initially Reported on 910620.Recommends That All Suspect Devices Be Replaced & Epoxy Compound Probed | |
| ML20072S950 | 5 April 1991 | Interim Part 21 Rept Re Failure of Standby Diesel Generator Fuel Nozzle Tips Mfg by Bendix.Initially Reported on 910327. on 910327 Memo Issued Requesting Recall of Affected Parts. Technical Evaluation Underway by Util | |
| ML20072T308 | 4 April 1991 | Advises That Ongoing Investigation Into Emergency Diesel Generator Failure Raised Questions Re Fuel Nozzle Tips Furnished by Cooper Energy Svc.Records Indicate Tips Supplied to Company | |
| ST-HL-AE-3655, Deficiency Rept & Part 21 Rept Re Change in Commitment to Procure Class 1E Battery Cables from Gould Nuclear Batteries Inc.Gould Discontinued Implementation of QA Program & Removed from Util Approved Vendor List | 3 January 1991 | Deficiency Rept & Part 21 Rept Re Change in Commitment to Procure Class 1E Battery Cables from Gould Nuclear Batteries Inc.Gould Discontinued Implementation of QA Program & Removed from Util Approved Vendor List | Commercial Grade Dedication |
| ST-HL-AE-3568, Revised Part 21 Rept Re Failure of Feedwater Isolation Valve Due to Thermal Incompatibility of Hydraulic Fluid | 15 October 1990 | Revised Part 21 Rept Re Failure of Feedwater Isolation Valve Due to Thermal Incompatibility of Hydraulic Fluid | |
| 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 | |
| ML20012C135 | 8 March 1990 | Part 21 Rept Re Failure of Connecting Rod in Standby Diesel Generator 22.Initially Reported on 891208.On 891128,master Connecting Rod Failed.Caused by over-drilling of Oil Holes. Final Rept, Finite Element Analysis of KSV-4-2A... Encl | Finite Element Analysis |
| 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 | |
| ML20011D197 | 8 December 1989 | Part 21 Rept Re 891128 Failure of Master Connecting Rod 4 & Ejection of Rod & Broken Pieces Through Right Ctr Door Frame Opening.Caused by High Cycle Fatigue to Transverse Oil Passage.Repairs to Crankshaft & Engine Underway | |
| ML19325E086 | 16 October 1989 | Followup Part 21 Rept Re Class 1E Battery Chargers W/ Transformers Running at Temps Exceeding Those Used in Qualification Rept When Operating at or Near Full Load Rating of Equipment.Listed Corrective Actions Underway | |
| ML17304B128 | 20 April 1989 | Part 21 Rept Re Multiple Control Element Assembly Slip or Drop Events at Unit 1 on 881210.Caused by Intermittent T Grounding of Control Element Drive.Initially Reported on 890419.Stack Assemblies Will Be Replaced | |
| ML20247P799 | 4 April 1989 | Part 21 Rept Re Atmospheric Dump Valves.Cause of Failure Speculative But Result of Piston Ring That Failed to Seal. Resolution to Problem Requires Increasing Pilot Valve Capacity & Reworking of Plug to Enlarge Pilot Flow Area | |
| ML17304B169 | 2 February 1989 | Part 21 Rept Re Ruskin Div Supplied Dampers W/Itt Actuators. Div Currently Evaluating Loctite Compound Which May Be Applied,Following Verification of Proper Damper Adjustment, to Threads of Extension Shaft in Place | Loctite |
| ML17304A971 | 18 January 1989 | Part 21 Rept Re Ksv Standby Diesel Generator Rocker Arm Failure.On 890104,exhaust Valve Rocker Arm Installed in KSV-20-T Engine Broke at Plant.Investigation Revealed That Castings Cracked During Mfg.Review Underway | |
| ST-HL-AE-2868, Part 21 & Final Deficiency Rept Re ESF Diesel Generator Galling Damage.Initially Reported on 881026.Damaged Parts on Diesel Generator 21 Replaced.Deficiency Is Solely Attributable to Cooper-Bessemer Maint Activities | 23 November 1988 | Part 21 & Final Deficiency Rept Re ESF Diesel Generator Galling Damage.Initially Reported on 881026.Damaged Parts on Diesel Generator 21 Replaced.Deficiency Is Solely Attributable to Cooper-Bessemer Maint Activities | |
| ST-HL-AE-2843, First Interim Part 21 & Deficiency Rept Re Elastomer Diaphragms Contained in Comsip Delphi Containment Hydrogen Analyzers.Initially Reported on 881012.Unit 1 Regulator Replaced.Next Rept Will Be Submitted by 881216 | 14 November 1988 | First Interim Part 21 & Deficiency Rept Re Elastomer Diaphragms Contained in Comsip Delphi Containment Hydrogen Analyzers.Initially Reported on 881012.Unit 1 Regulator Replaced.Next Rept Will Be Submitted by 881216 | |
| ST-HL-AE-2840, First Interim Deficiency & Part 21 Rept Re Class 1E Battery Cables.Initially Reported on 881012.Jumper Cables Will Be Replaced W/Qualified Cables Prior to Fuel Load.Next Rept Will Be Submitted by 881230 | 9 November 1988 | First Interim Deficiency & Part 21 Rept Re Class 1E Battery Cables.Initially Reported on 881012.Jumper Cables Will Be Replaced W/Qualified Cables Prior to Fuel Load.Next Rept Will Be Submitted by 881230 | |
| ML20207P015 | 4 October 1988 | Part 21 Rept Re Fuel Nozzle Tips in Standby Diesel Generator KSV-20-T W/Cracks Permitting Diesel Fuel to Be Sprayed Into Cylinders.Heavy Vapors Observed Emitting from Breathers on Some Cylinder Heads | |
| ST-HL-AE-2767, Final Deficiency Rept Re Cracking of ESF Diesel Generator Heads.Initially Reported on 880801.Precautions Added to ESF Diesel Generator Instruction Manual to Ensure Engine Timing Checked Out Prior to Operation Following Maint | 30 August 1988 | Final Deficiency Rept Re Cracking of ESF Diesel Generator Heads.Initially Reported on 880801.Precautions Added to ESF Diesel Generator Instruction Manual to Ensure Engine Timing Checked Out Prior to Operation Following Maint | |
| ST-HL-AE-2698, Final Deficiency Rept Re Veritrak Transmitters.Initially Reported on 860801.Reactor Protection Setpoints Currently in Use Considered Conservative & No Hardware Changes Required | 29 June 1988 | Final Deficiency Rept Re Veritrak Transmitters.Initially Reported on 860801.Reactor Protection Setpoints Currently in Use Considered Conservative & No Hardware Changes Required | Post Accident Monitoring |
| ST-HL-AE-2696, Part 21 & Deficiency Rept Re Defects in Westinghouse Circuit Breakers.Initially Reported on 880520.Item Reportable Under 10CFR50.55(e) for Unit 2 & 10CFR21 for Units 1 & 2.Remaining Unit 2 Insps Will Be Completed Prior to Fuel Load | 15 June 1988 | Part 21 & Deficiency Rept Re Defects in Westinghouse Circuit Breakers.Initially Reported on 880520.Item Reportable Under 10CFR50.55(e) for Unit 2 & 10CFR21 for Units 1 & 2.Remaining Unit 2 Insps Will Be Completed Prior to Fuel Load | |
| ST-HL-AE-2688, Final Deficiency Rept Re Leakage of aluminum-bronze Essential Cooling Water Sys.Initially Reported on 880512. No Safety Concerns Exist If Left Uncorrected Based Upon Detailed Technical Evaluations Previously Submitted | 9 June 1988 | Final Deficiency Rept Re Leakage of aluminum-bronze Essential Cooling Water Sys.Initially Reported on 880512. No Safety Concerns Exist If Left Uncorrected Based Upon Detailed Technical Evaluations Previously Submitted | |
| ML20154M606 | 18 April 1988 | Provides Further Info Re Seal Matl Incompatibility Issue at Plant,Per 880415 Discussion.Recommends Enhanced Surveillance Program for Suspected Operators to Monitor for Excessive Leakage.Part 21 Related | |
| ST-HL-AE-2559, Seventh Interim Deficiency Rept Re Veritrak Transmitters. Initially Reported on 860801.Westinghouse Presently Compiling Data from Tests on Transmitter Capsules & Amplifiers.Next Rept Will Be Submitted by 880630 | 25 March 1988 | Seventh Interim Deficiency Rept Re Veritrak Transmitters. Initially Reported on 860801.Westinghouse Presently Compiling Data from Tests on Transmitter Capsules & Amplifiers.Next Rept Will Be Submitted by 880630 | |
| ST-HL-AE-2538, Supplemental Deficiency Rept on Electrical Splices Using Raychem Heat Shrink Insulation Matl.Initially Reported on 870219.Review of Cables & Terminations Listed as Not Having Splice Performed to Assure Proper Transmission of Info | 1 March 1988 | Supplemental Deficiency Rept on Electrical Splices Using Raychem Heat Shrink Insulation Matl.Initially Reported on 870219.Review of Cables & Terminations Listed as Not Having Splice Performed to Assure Proper Transmission of Info | |
| ML20153B281 | 22 February 1988 | Part 21 Rept Re Defect in Operation of Gas Monitors Using Fixed Filters.Initially Reported on 880212.Caused by Error in Software for Monitors.Vendor Testing Mod to Software & in Interim Recommends Changing Filters Every 48 H |