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| Issue date | Title | Topic | |
|---|---|---|---|
| ML18016A901 | 12 April 1999 | Part 21 Rept Re Defect in Component of DSRV-16-4,Enterprise DG Sys.Caused by Potential Problem with Connecting Rod Assemblies Built Since 1986,that Have Been Converted to Use Prestressed Fasteners.Affected Rods Should Be Inspected | |
| ML20236V312 | 29 July 1998 | Final Part 21 Rept Re Enterprise DSR-4 & DSRV-4 Edgs.Short Term Instability Was Found During post-installation Testing & Setup as Part of Design mod/post-work Testing Process. Different Methods Were Developed to Correct Problem | |
| ML20248A167 | 22 May 1998 | Interim Part 21 Re Enterprise DSR-4 & DSRV-4 Emergency diesel.Post-installation Testing Revealed,High Em/Rfi Levels Affected New Controllers,Whereas Original Controllers Were unaffected.Follow-up Will Be Provided No Later than 980731 | |
| ML17309A621 | 29 September 1997 | Part 21 Rept Re Final Disposition of Masterflow 713 & Embeco 636 Grout Nonconformance Reported by Master Builders,Inc. Licensee Continuing to Monitor shelf-life of Masterflow 713 & Embeco 636 Grouts Produced at Rancho Cucamonga | |
| ML20140G448 | 1 May 1997 | Part 21 Rept Re Potential Defect in Component of Dsrv & Dsr Enterprise Standby Diesel Generator Sys.Recommends That Springs Be Inspected on Periodic Basis,Such as During Refueling Outages | |
| ML20133E800 | 8 January 1997 | Deficiency Rept Re Nonconformance Related to Masterflow 713 Grout,Which Master Builders,Inc Has Supplied as Nuclear SR Product to 18 Npps.Cause Unknown.Requests That Listed Info Be Provided to Gain Insight as to Scope & Possible Cause | |
| ML20134H336 | 5 November 1996 | Part 21 Rept Re Defective Inner Thrust Bearing 1801461-01 Used in PSA 35 Mechanical Shock Arrestor Used as Restraint on Piping Sys for Nuclear Generating Plant.Lot of Defective Parts Located & Isolated to Three Customers | |
| ML20115D200 | 9 July 1996 | Part 21 Rept Re Mfg Defect of Enterprise DSR-4 & DSRV-4 Edgs,Originally Mfg by Calcon Corp.Amot Control Corp Purchased Calcon Product Line & Maintains Design & Production.Valves Returned to Cooper Energy Svcs on 960131 | |
| 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 | |
| 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 | |
| ML20059H772 | 17 January 1994 | Part 21 Rept Re Virginia Power Notifying Fairbands Morse Via Failure Analysis Rept NESML-Q-058 of Defective Air Start Distributor cam,16104412 | |
| ML20059F263 | 7 January 1994 | Part 21 Rept Re Air Start Distributor Cam Mfg by Fairbanks Morse.Mfg Suggests That Site Referenced in Encl App I Inspect Air Start Distributor Cam as Soon as Practical | |
| ML20058K384 | 9 December 1993 | Part 21 Rept Re Potential Defect in Component of Dsrv & Dsr Enterprise Standby DG Sys,Regarding Potential Problem W/ Subcover Assembled Atop Power Head | |
| ML20127H230 | 15 January 1993 | Part 21 Rept Re Potential Defeat in Component of Dsrv & Dsr Enterprise Standby DG Sys.Starting Air Distributor Housing Assemblies Installed as Replacement Parts at Listed Sites | |
| 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 |
| ML20126B042 | 17 December 1992 | Final Part 21 Rept Re Potential Problem W/Steel Cylinder Heads.Initially Reported on 921125.Caused by Inadequate Cast Wall Thickness at 3/4-inch-10 Bolt Hole.Stud at Location Indicated on Encl Sketch Should Be Removed | Loctite |
| ML20127D149 | 4 September 1992 | Part 21 Rept Re Defect in Component of DSRV-16-4 Enterprise Standby DG Sys Jacket Water Pump Shaft.Caused by Incorrect Tapers Machined on Shaft Due to Vendor Mismatching.All Affected Shafts Recalled & Quality Insp Plans Changed | |
| ML17289A697 | 26 June 1992 | Amend 1 to Part 21 Rept 158 Re gear-wear Induced Failures in engine-driven Jacket Water Pump in DSRV-16-4 Standby DG Sys. Initially Reported on 911029.Grand Gulf Station Observed Wear Characteristics in as Little as 500 Operating Hours | |
| ML20094L127 | 13 March 1992 | Amend 1 to Part 21 Rept 159 Re Potential Defect in Power Cylinder Liner.Initially Reported on 920115.Caused by Liner/ Block Fit & Localized Matl Microstructure.All Drawings & Specs Revised to Address Matl Design Requirements | |
| ML20087D319 | 14 January 1992 | Potential Part 21 Rept Re Problems W/Elmwood/Fasco Contactor Carriers Breaking in Contactor Model 30-FO-30. Caused by Distortion/Shrinkage of Molded Phenolic Contactor Carrier.Replacement Contactors Installed | |
| ML17223A594 | 9 March 1990 | Errata to 900126 Part 21 Rept Re Anchor/Darling Actuators Incorporating Use of Teldyne-Republic four-way Valves.Lists Plants Inadvertently Left Out in Original Rept | |
| ML20005G683 | 5 January 1990 | Part 21 Rept Re Installation Instructions for Grommet Use Range for Patel Conduit Seal P/N 841206.Conduit Seals in Environ Qualification Applications Inspected for Proper Wire Use Range & Grommets Replaced | |
| ML20248E012 | 13 September 1989 | Supplemental Part 21 Rept Re Potential Problem W/Six Specific Engine Control Devices in Air Start,Lube Oil, Jacket Water & Crankcase Sys.Initially Reported on 890429. California Controls Co Will Redesign Valve Seating | |
| ML20246K740 | 26 April 1989 | Part 21 Rept Re Incorrectly Stamped Name Plates on Certain Asco Nuclear Qualified Valves.Vendor Will Contact Each Affected Facility & Furnish Correctly Stamped Plates & in Near Future Discontinue Sale of Rebuild Kits for Valves | |
| 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 | |
| ML20206M440 | 21 November 1988 | Deficiency Rept Re Misapplication of Raychem Criteria in Selection of Some Matl Used in Electrical Cable Field Splice Kits.Initially Reported on 880920.Investigation Is in Process.Final Rept Will Be Submitted by 881222 | |
| ML20205C929 | 18 October 1988 | Part 21 & Deficiency Rept Re Valves Installed Opposite to Direction of Flow,Per 10CFR21 & 50.55 Requirements.Item Being Tracked by MTS EAI B-5115 & Scheduled for Completion 881030 | Boric Acid |
| ML20205D665 | 18 October 1988 | Part 21 & Deficiency Rept Re Penetration Seals Found Not to Be Watertight.Initially Reported on 880609.Water Leakage Tests Performed on Unit Upper Cable Spreading Room Seals. All Floor Penetration Seal Assemblies Repaired | Safe Shutdown |
| ML20207P045 | 5 October 1988 | Part 21 Rept 146 Re Defect in Left Intercooler Inlet Adapter on Standby Diesel Engine Generator.Recommends Utils Inspect Left Intake Manifold Drain as Part of Operating Plan.Addl Info Expected by 881015 | |
| ML20155D647 | 28 September 1988 | Deficiency Rept Re Valves Installed Opposite to Direction of Flow.Initially Reported on 880629.Final Rept Delayed Until 881020 | |
| ML20207J736 | 20 September 1988 | Interim Deficiency Rept Re Misapplication of Vendor Criteria in Selection of Some Matl Used in Electrical Cable Field Splice Kits.Initially Reported on 880601.Final Rept Expected Prior to 881123 | |
| ML20153E227 | 1 September 1988 | Part 21 & Deficiency Rept Re ESF Filtration Unit Bolts. Initially Reported on 880628.Contractor Conducted Training Session for Personnel to Stress Importance of Clarifying Incomplete Drawing Info & Requirements of Bolting Procedure | |
| ML20151V190 | 16 August 1988 | Deficiency Rept Re non-water Tight Penetration Seals.Test Rig Constructed to Simulate Typical Upper Cable Spreading Room Configuration & Sealants Verified to Provide Waterproof Seal.Next Rept Will Be Submitted by 881020 | |
| ML20196L481 | 7 July 1988 | Part 21 & Deficiency Rept Re Valves Installed Opposite to Direction of Flow.Initially Reported on 880601.Investigation in Progress to Determine Full Scope of Condition.Final Rept Will Be Submitted by 881001 | |
| ML20151A778 | 6 July 1988 | Deficiency Rept Re nonwater-tight Penetration Seals. Initially Reported on 880609.Investigation Incomplete.Next Rept Expected by 880818 | Fire Barrier |
| ML20196C297 | 28 June 1988 | Deficiency Rept Re ESF Filtration Bolts.Initially Reported on 880601.Investigation of Root Cause of Condition Ongoing. Final Rept Will Be Submitted by 880901 | |
| ML20195D854 | 16 June 1988 | Part 21 Rept Re Potentially Reportable Condition Associated W/Dresser Model 7440W Check Valves Supplied W/Flow Direction Arrow Stamped Opposite to Valve Flow.Investigation Being Conducted.Evaluation of Bechtel Western Power Co Ltr Encl | |
| ML20154J410 | 12 May 1988 | Addendum 1 to Supplemental Part 21 Rept 145 Re Potential Problem w/F-573-156 Pressure Sensor/Lube Oil Trip.Initially Reported on 880429.Addl 1-1/8-inch Diameter W/Deep Counterbone in Pressure Head Added to Activate Valve | |
| ML20154A684 | 10 May 1988 | Deficiency Rept Re Electrical Cable Tray Separation. Initially Reported on 880414.Walkdown of All safety-related Cable Trays Conducted to Ensure Any Unacceptable Separation Distance Identified | |
| ML20153B619 | 29 April 1988 | Part 21 Rept Re Potential Defect in Component of Dsr or Dsrv Standby Diesel Generators Supplied to Utils.Recommends Return of Subj Components in Onsite Warehouse Storage & Suggests Surveillance of Devices Already Installed | |
| ML20151K262 | 14 April 1988 | Interim Deficiency & Part 21 Rept Re Control Room Essential HVAC Sys.Initially Reported on 870914.Addl Concern Noted Re Incorrect Assumption in Design Calculation.Corrective Action Beyond Calculation Review Involves Logic Mod | |
| ML20151K237 | 14 April 1988 | Part 21 & Deficiency Rept Re Damage to Emergency Diesel Generator Jacket Water HX During Flushing.Initially Reported on 860917.HX Repaired & Installed in Unit 2.Thermostatic Valves Being Modified | |
| ML20148R644 | 27 January 1988 | Part 21 & Deficiency Rept Re Protection of Containment Electrical Penetration Assemblies Fabricated by Conax Buffalo Corp.Initially Reported on 871203.LOCA Could Cause One or More of nonsafety-related Circuits to Short Circuit | |
| ML20237E994 | 22 December 1987 | Deficiency Rept Re Protection of Containment Electrical Penetration Assemblies (Epa).Initially Reported on 871203. Investigations in Progress.Final Rept Will Be Submitted by 880130 | |
| ML20236V298 | 19 November 1987 | Deficiency Rept Re Electrical Separation Criteria Specified in Const Spec X3AR01.Initially Reported on 870909.Second Test of Electrical Separation Requirements Very Positive. Final Rept Expected to Be Submitted Prior to 880301 | |
| ML20236K143 | 2 November 1987 | Interim Part 21 & Deficiency Rept Re Inductive Current Interruptive Capacity of Solid State Protection Sys Motor Driven Relay Contacts.Shunt Suppression Device Will Be Added to Solenoid | |
| ML20236J537 | 29 October 1987 | Part 21 & Deficiency Rept Re Solid State Protection Sys motor-driven Relay Contacts Inductive Current Interruptive Capacity.Initially Reported on 870110.Hardware Mods to Affected Circuits Planned Prior to Fuel Load | |
| ML20239A211 | 14 September 1987 | Part 21 & Deficiency Rept Re Design of Control Room Essential (CRE) HVAC Sys.Initially Reported on 870713. Backdraft Dampers Added to Unit 1 CRE HVAC Units & Will Be Added to Unit 2 Commensurate W/Const Schedule | |
| ML20237H774 | 12 August 1987 | Interim Deficiency Rept Re Emergency HVAC Sys in Control Room.Initially Reported on 870713.Engineering Evaluation in Progress to Determine Potential Impacts of Condition on Plant Safety.Final Rept Will Be Submitted by 870915 | |
| ML20216E472 | 28 May 1987 | Part 21 Rept 140 Re Potential Defect in Air Pressure Regulators Mfg by Bellofram.Dripwell Gasket May Fail Due to Mismachining of Gasket Seating Surface Causing Loss of Control Air & Starting Air Pressure |