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Category:DEFICIENCY REPORTS (PER 10CFR50.55E & PART 21)
MONTHYEARML20058K3841993-12-0909 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 ML20248E0121989-09-13013 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 ML20154J4101988-05-12012 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 ML20153B6191988-04-29029 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 ML20205F6141986-08-13013 August 1986 Part 21 Rept Re Connecting Rod Bolts for Dsrv Engines.Listed Procedures Recommended for Next Connecting Rod Insp, Including Replacement of Bolts Due to Cracked Threads & Large Grooves & Galls in Threads ML20206U0591986-07-0202 July 1986 Part 21 Rept Re Potential Defect in Component of Dsrv Standby Diesel Generators,Involving Problem W/Fastening of Engine Connecting Rod Assembly Which Could Result in Engine Nonavailability.Procedure Will Be Issued by 860718 ML20141A1081986-03-31031 March 1986 Part 21 Rept 134 Re Potential Defect in K-1 Relay in Generator Voltage Regulator.Initially Reported on 860219. Corrective Action Must Take Into Account Equipment Operating Range of 100-137.5-volt Dc ML20154N3431986-03-10010 March 1986 Initial Part 21 Rept 135 Re Potential Problem W/Lube Oil Sump Tank Foot Valve of Dsrv Standby Diesel Generator for Facilities.Cause Not Determined.Recommends Utils Inspect Condition of Foot Valve Liners & Notify Tdi of Findings ML20153G1021986-02-19019 February 1986 Part 21 Rept Re Potential Defect in K-1 Relays of Dsr or Dsrv Standby Diesel Generators Mfg by Gould/Ite.Relays Have Incorrect Voltage Range.Dc Voltage Source or Voltage Regulator Circuitry Requires Mod ML20198C4981985-11-0606 November 1985 Part 21 Rept Re Potential Defect in Dsr or Dsrv Standby Diesel Generator Intake & Exhaust Valve Springs Mfg by Betts Spring Co.Users Recommended to Inspect Engines for Broken Springs & Identify Original Mfg ML20084G3531984-04-19019 April 1984 Final Deficiency Rept Re Pacific Scientific Co Shock Arrestor Capstan Spring Tang.Initially Reported on 831013. Bellefonte Snubbers Will Be Replaced & Hartsville Snubbers Returned to Vendor for Repair.Springs Subj to Insp ML20087J6661984-03-0808 March 1984 Followup Part 21 Rept Re Nuclear Valve/Actuator Stroking Time Possibly Lengthened Beyond 15 When Using hydrocarbon-based Lubricants.Ltrs to Affected Utils Encl ML20081C0171984-03-0101 March 1984 First Interim Deficiency Rept Re Loose Drive Hubs on Overspeed Governor Drive Shaft on Transamerica Delaval,Inc Diesels.Initially Reported on 840203.Svc Info Memo Being Reviewed for Approval.Also Reportable Per Part 21 ML20079N5121984-01-23023 January 1984 Final Deficiency Rept Re Delaval Problem W/Starting Air Valve Assembly on Standby Diesels.Initially Reported on 821201.Capscrews Replaced Per Approved Procedure & Drawings Revised to Reflect Shorter Length ML20083H1921984-01-0505 January 1984 First Interim Deficiency Rept Re Transamerica Delaval,Inc QA Program.Initially Reported on 831206.Final Configuration for Control Cabinet Indicates Drawing Revs K,L & M Not Incorporated.Also Reportable Per Part 21 ML20083E1981983-12-20020 December 1983 First Interim Deficiency Rept Re Fuel Oil Line Rupture in Transamerica Delaval,Inc Generator.Initially Reported on 831121.Const Activities Deferred for Hartsville Units 1 & 2. Next Rept Expected by 840413.Also Reported Per Part 21 ML20078B3811983-09-0606 September 1983 Part 21 Rept Re Matrix Actuator Model 33122-SR 80.Mounting Bolts Loosened & Spring Return Cylinder Began to Separate from Ctr Body of Actuator.Investigation Being Conducted by Xomox Corp ML20077G6661983-07-27027 July 1983 Part 21 Rept Re Circuit Breakers Mfg Between Nov 1981 & Feb 1982.Breakers Should Be Inspected for Broken Puffer Linkage Studs.Stud Identified as Part Number 192247A.List of Circuit Breakers for Nuclear Plants Encl ML20083L9751983-05-27027 May 1983 Part 21 Rept Re Failure of Circuit Breakers During Environ Testing.Test Results Indicate That Temp Sensitivity Problem May Be Generic to All Ite Imperial Corp thermal-magnetic Circuit Breakers Calibr for 40 C Svc ML20076H1601983-05-23023 May 1983 Pt 21 Rept Re Potential Defect in Transmitter Mfg by Rosemount,Inc Used in Control Sys Components Furnished to Listed Plants.All Components Involved Retrofitted W/New Circuit Boards.Matter Closed ML20074A2041983-04-26026 April 1983 Interim Deficiency Rept Re Misapplication of Ite Gould Circuit Breakers in post-LOCA Hydrogen Recombiners Supplied by Rockwell Intl.Initially Reported on 830328.Matter Under Investigation.Final Rept by 830808.Reported Per Part 21 ML20069K6811983-04-18018 April 1983 First Interim Deficiency Rept Re Pipe Support Spacing Utilizing Alternate Criteria.Initially Reported on 830317. Investigation Postponed Until Design & Const Resumed ML20073J8051983-04-12012 April 1983 Third Interim Deficiency Rept Re Nonconservative Calculation Method for General Const Spec G-32 Violations.Initially Reported on 820528.Design Std Being Revised to Clarify Use of Factors of Safety in DS-C6.1 ML20073P1281983-04-0808 April 1983 Second Interim Deficiency Rept Re Problem W/Delaval Starting Air Valve Assembly on Standby Diesels.Initially Reported on 821201.Util Continuing to Attempt to Acquire Necessary Info from Transamerica Delaval,Inc.Also Reported Per Part 21 ML20072Q9571983-03-28028 March 1983 First Interim Deficiency Rept Re Failure of Util Div of Engineering Design to Provide Bolt Tightening Requirements to Div of Const.Initially Reported on 830228.Const Deferred. Rept to Be Submitted When Const Decision Made ML20072R3291983-03-28028 March 1983 Interim Deficiency Rept 1 Re CF Braun Documentation Control Program Failure to Monitor Closeout of Final Design Change Control Documents.Initially Reported on 830302.Final Rept Due Upon Commencement of Const.Also Reportable Per Part 21 ML20074A2221983-03-11011 March 1983 Part 21 Rept Re Failure of post-LOCA Hydrogen Recombiner Component During IEEE-323 Qualification Program.Circuit Breaker Not Properly Selected for Specific Application.Plant Operators Notified of Deviation ML20028G0821983-01-31031 January 1983 Final Deficiency Rept Re Itt Grinnell Failure to Use Proper Testing Methods.Initially Reported on 810304.Spool Pieces re-examined Per ASME Section III,1974 Edition,Winter Addenda 1975 Code.Condition No Longer Reportable Per 10CFR50.55(e) ML20083M6711983-01-24024 January 1983 First Interim Deficiency Rept Re Potential Deterioration of Isoprene Gaskets on Standby Diesel Generator.Initially Reported on 821217.Transamerica Delaval,Inc Changed Matl for Drive Element to Neoprene.Also Reportable Per Part 21 ML20083M6651983-01-24024 January 1983 First Interim Deficiency Rept Re Residual Stress on Diesel Generator Engine Piston Skirt Castings.Initially Reported on 821215.Removal of Piston Skirt for Insp Deferred Until Restart of Design & Const.Also Reportable Per Part 21 ML20028C2481982-12-30030 December 1982 First Interim Deficiency Rept Re Insufficient Length of Starting Air Valve Assembly Capscrews.Initially Reported on 821201.Transamerica Delaval,Inc Changed Designed Length of Capscrew.Next Rept by 830415.Also Reportable Per Part 21 ML20070F0121982-12-13013 December 1982 Final Deficiency Rept Re Atlas QA Documentation on Auxiliary & Fuel Bldg Structural Steel.Initially Reported on 811113. QA Hold Placed on Suspect Items Until Further Testing Performed.Also Reportable Under Part 21 ML20028A4891982-11-0909 November 1982 Final Deficiency Rept Re Storage & Preventive Maint Program Deficiencies.Initially Reported on 821007.Pipe Caps Replaced,Piping Placed on Support,Tanks Moved to Inside Storage in Upright Position & Conditions & Program Reviewed ML20065R3701982-10-14014 October 1982 Interim Deficiency Rept Re Deferral of Const Activities. Initially Reported on 820623.Commitments Made in Rept,Audit Findings & Response to Violations Deferred Until Restart of Design & Const ML20027B8451982-09-20020 September 1982 First Interim Deficiency Rept Re QA Deficiencies on Allis- Chalmers Butterfly Valves.Initially Reported on 820823.Const Activities Deferred.Final Rept Will Be Submitted After Final Decision Re Completion or Cancellation of Project ML20063L3721982-09-0202 September 1982 First Interim Deficiency Rept Re Failure of Kerotest Valves to Meet Seismic Criteria.Initially Reported on 820804. Negotiations Underway W/Contractor for Return of Valves. Const Activities Deferred.Also Reportable Per Part 21 ML20055A0731982-07-0707 July 1982 First Interim Deficiency Rept Re Nonconformance in Intake Pumping Station Door & Hatch Design,Initially Reported 820604.Final Rept Will Not Be Issued Until Decision to Resume Facility Const Reached ML20055A0791982-07-0606 July 1982 First Interim Deficiency Rept Re Possible Installation of Bolt Anchors in Grant Areas,Initially Reported 820610. Investigation Postponed Until Const Resumed ML20054N0821982-07-0101 July 1982 Final Deficiency Rept Re Excessive Stress on Spray Pond Supply & Bypass Headers,Initially Reported on 820218. Piping Layout Revised & Drawings Revised/Reissued.Seismic Analysis Complete & Isometrics Issued ML20054J9111982-06-23023 June 1982 Part 21 Rept Re Potential Defect in Couplings Drive Element of Dsrv or Dsr Standby Diesel Generator.Affected Licensees Will Be Notified No Later than 820715 ML20054K1531982-06-23023 June 1982 Informs That Final Deficiency Repts for Listed Nonconformances Will Not Be Submitted Until Final Decision Is Made Re Const of Projects ML20054H6821982-06-18018 June 1982 Part 21 Rept Re Pneumatic Actuator Yoke Failure.List of Other Projects W/Similar Equipment Encl ML20054G1121982-06-11011 June 1982 Fourth Interim Deficiency Rept Re Link Rod assembly-Delaval Diesels.Due to Const Deferment Final Deficiency Rept Will Not Be Issued Pending Final Decision on Future of Projects. Also Reportable Per Part 21 ML20054E4111982-06-0101 June 1982 Fourth Interim Deficiency Rept Re Bethlehem Steel Co Galvanized A325 Bolts,Initially Reported on 811029.Const Activities Deferred Until Sufficient Info Indicates Whether Project Should Be Completed or Canceled ML20054E4081982-06-0101 June 1982 First Interim Deficiency Rept Re Split in Biological Shield Wall,Initially Reported on 820429.Investigation Postponed Until Const Activities for Project Resume.No Final Rept Will Be Submitted Until Decision Made Re Continuation of Const ML20053E1201982-05-28028 May 1982 Second Interim Deficiency Rept Re Check Valve Leak in Air Start Sys of Standby Diesel Generators,Initially Reported 820209.Evaluation by Vendor Underway.Also Reported Per Part 21 ML20052A6071982-04-19019 April 1982 Suppl to Final Deficiency Rept Re Standby Gas Treatment Sys Charcoal Absorber,Initially Reported 800508.Util Unable to Meet Corrective Action Completion Date in 811209 Final Rept Due to Deferral of Const.Also Reported Per Part 21 ML20052A5981982-04-12012 April 1982 Final Deficiency Rept Re Incorrect Orifice Size in RHR Discharge Line Indicated on Fabrication Spec,Initially Reported 820304.Typographical Error Corrected Before Hardware Mfg ML20054B1101982-04-0202 April 1982 Fifth Interim Deficiency Rept Re Review of Purchase Request Forms Initiated by Const,Initially Reported 810520.Util in Process of Analyzing Deficiencies.Next Rept Expected by 820715 ML20054C4691982-04-0101 April 1982 Part 21 Rept Re Hma Relays W/Contact Leads Not Fully Insulated,Initially Reported 810708.No Operating BWRs Utilize Subj Hma Relays.All Potential Problems Will Be Corrected Before Startup 1993-12-09
[Table view] Category:TEXT-SAFETY REPORT
MONTHYEARML20058K3841993-12-0909 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 ML20248E0121989-09-13013 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 ML20154J4101988-05-12012 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 ML20153B6191988-04-29029 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 ML20205F6141986-08-13013 August 1986 Part 21 Rept Re Connecting Rod Bolts for Dsrv Engines.Listed Procedures Recommended for Next Connecting Rod Insp, Including Replacement of Bolts Due to Cracked Threads & Large Grooves & Galls in Threads ML20206U0591986-07-0202 July 1986 Part 21 Rept Re Potential Defect in Component of Dsrv Standby Diesel Generators,Involving Problem W/Fastening of Engine Connecting Rod Assembly Which Could Result in Engine Nonavailability.Procedure Will Be Issued by 860718 ML20141A1081986-03-31031 March 1986 Part 21 Rept 134 Re Potential Defect in K-1 Relay in Generator Voltage Regulator.Initially Reported on 860219. Corrective Action Must Take Into Account Equipment Operating Range of 100-137.5-volt Dc ML20154N3431986-03-10010 March 1986 Initial Part 21 Rept 135 Re Potential Problem W/Lube Oil Sump Tank Foot Valve of Dsrv Standby Diesel Generator for Facilities.Cause Not Determined.Recommends Utils Inspect Condition of Foot Valve Liners & Notify Tdi of Findings ML20153G1021986-02-19019 February 1986 Part 21 Rept Re Potential Defect in K-1 Relays of Dsr or Dsrv Standby Diesel Generators Mfg by Gould/Ite.Relays Have Incorrect Voltage Range.Dc Voltage Source or Voltage Regulator Circuitry Requires Mod ML20198C4981985-11-0606 November 1985 Part 21 Rept Re Potential Defect in Dsr or Dsrv Standby Diesel Generator Intake & Exhaust Valve Springs Mfg by Betts Spring Co.Users Recommended to Inspect Engines for Broken Springs & Identify Original Mfg ML20084G3531984-04-19019 April 1984 Final Deficiency Rept Re Pacific Scientific Co Shock Arrestor Capstan Spring Tang.Initially Reported on 831013. Bellefonte Snubbers Will Be Replaced & Hartsville Snubbers Returned to Vendor for Repair.Springs Subj to Insp ML20087J6661984-03-0808 March 1984 Followup Part 21 Rept Re Nuclear Valve/Actuator Stroking Time Possibly Lengthened Beyond 15 When Using hydrocarbon-based Lubricants.Ltrs to Affected Utils Encl ML20081C0171984-03-0101 March 1984 First Interim Deficiency Rept Re Loose Drive Hubs on Overspeed Governor Drive Shaft on Transamerica Delaval,Inc Diesels.Initially Reported on 840203.Svc Info Memo Being Reviewed for Approval.Also Reportable Per Part 21 ML20079N5121984-01-23023 January 1984 Final Deficiency Rept Re Delaval Problem W/Starting Air Valve Assembly on Standby Diesels.Initially Reported on 821201.Capscrews Replaced Per Approved Procedure & Drawings Revised to Reflect Shorter Length ML20083H1921984-01-0505 January 1984 First Interim Deficiency Rept Re Transamerica Delaval,Inc QA Program.Initially Reported on 831206.Final Configuration for Control Cabinet Indicates Drawing Revs K,L & M Not Incorporated.Also Reportable Per Part 21 ML20083E1981983-12-20020 December 1983 First Interim Deficiency Rept Re Fuel Oil Line Rupture in Transamerica Delaval,Inc Generator.Initially Reported on 831121.Const Activities Deferred for Hartsville Units 1 & 2. Next Rept Expected by 840413.Also Reported Per Part 21 ML20078B3811983-09-0606 September 1983 Part 21 Rept Re Matrix Actuator Model 33122-SR 80.Mounting Bolts Loosened & Spring Return Cylinder Began to Separate from Ctr Body of Actuator.Investigation Being Conducted by Xomox Corp ML20077G6661983-07-27027 July 1983 Part 21 Rept Re Circuit Breakers Mfg Between Nov 1981 & Feb 1982.Breakers Should Be Inspected for Broken Puffer Linkage Studs.Stud Identified as Part Number 192247A.List of Circuit Breakers for Nuclear Plants Encl ML20024C1401983-06-30030 June 1983 Engineering Evaluation Rept:Investigation & Grouting of Leaks Associated W/Tendon Sheaths H32-009 & H32-011,Unit 2 Containment Bldg. ML20073S8641983-05-31031 May 1983 Details of Deferral Plans for Hartsville Nuclear Plant a ML20083L9751983-05-27027 May 1983 Part 21 Rept Re Failure of Circuit Breakers During Environ Testing.Test Results Indicate That Temp Sensitivity Problem May Be Generic to All Ite Imperial Corp thermal-magnetic Circuit Breakers Calibr for 40 C Svc ML20076H1601983-05-23023 May 1983 Pt 21 Rept Re Potential Defect in Transmitter Mfg by Rosemount,Inc Used in Control Sys Components Furnished to Listed Plants.All Components Involved Retrofitted W/New Circuit Boards.Matter Closed ML20074A2041983-04-26026 April 1983 Interim Deficiency Rept Re Misapplication of Ite Gould Circuit Breakers in post-LOCA Hydrogen Recombiners Supplied by Rockwell Intl.Initially Reported on 830328.Matter Under Investigation.Final Rept by 830808.Reported Per Part 21 ML20069K6811983-04-18018 April 1983 First Interim Deficiency Rept Re Pipe Support Spacing Utilizing Alternate Criteria.Initially Reported on 830317. Investigation Postponed Until Design & Const Resumed ML20073J8051983-04-12012 April 1983 Third Interim Deficiency Rept Re Nonconservative Calculation Method for General Const Spec G-32 Violations.Initially Reported on 820528.Design Std Being Revised to Clarify Use of Factors of Safety in DS-C6.1 ML20073P1281983-04-0808 April 1983 Second Interim Deficiency Rept Re Problem W/Delaval Starting Air Valve Assembly on Standby Diesels.Initially Reported on 821201.Util Continuing to Attempt to Acquire Necessary Info from Transamerica Delaval,Inc.Also Reported Per Part 21 ML20079E9911983-03-31031 March 1983 Caseload Forecast ML20072Q9571983-03-28028 March 1983 First Interim Deficiency Rept Re Failure of Util Div of Engineering Design to Provide Bolt Tightening Requirements to Div of Const.Initially Reported on 830228.Const Deferred. Rept to Be Submitted When Const Decision Made ML20072R3291983-03-28028 March 1983 Interim Deficiency Rept 1 Re CF Braun Documentation Control Program Failure to Monitor Closeout of Final Design Change Control Documents.Initially Reported on 830302.Final Rept Due Upon Commencement of Const.Also Reportable Per Part 21 ML20074A2221983-03-11011 March 1983 Part 21 Rept Re Failure of post-LOCA Hydrogen Recombiner Component During IEEE-323 Qualification Program.Circuit Breaker Not Properly Selected for Specific Application.Plant Operators Notified of Deviation ML20028G0821983-01-31031 January 1983 Final Deficiency Rept Re Itt Grinnell Failure to Use Proper Testing Methods.Initially Reported on 810304.Spool Pieces re-examined Per ASME Section III,1974 Edition,Winter Addenda 1975 Code.Condition No Longer Reportable Per 10CFR50.55(e) ML20083M6711983-01-24024 January 1983 First Interim Deficiency Rept Re Potential Deterioration of Isoprene Gaskets on Standby Diesel Generator.Initially Reported on 821217.Transamerica Delaval,Inc Changed Matl for Drive Element to Neoprene.Also Reportable Per Part 21 ML20083M6651983-01-24024 January 1983 First Interim Deficiency Rept Re Residual Stress on Diesel Generator Engine Piston Skirt Castings.Initially Reported on 821215.Removal of Piston Skirt for Insp Deferred Until Restart of Design & Const.Also Reportable Per Part 21 ML20028C2481982-12-30030 December 1982 First Interim Deficiency Rept Re Insufficient Length of Starting Air Valve Assembly Capscrews.Initially Reported on 821201.Transamerica Delaval,Inc Changed Designed Length of Capscrew.Next Rept by 830415.Also Reportable Per Part 21 ML20070F0121982-12-13013 December 1982 Final Deficiency Rept Re Atlas QA Documentation on Auxiliary & Fuel Bldg Structural Steel.Initially Reported on 811113. QA Hold Placed on Suspect Items Until Further Testing Performed.Also Reportable Under Part 21 ML20028A4891982-11-0909 November 1982 Final Deficiency Rept Re Storage & Preventive Maint Program Deficiencies.Initially Reported on 821007.Pipe Caps Replaced,Piping Placed on Support,Tanks Moved to Inside Storage in Upright Position & Conditions & Program Reviewed ML20069Q3771982-10-31031 October 1982 Const Employee Monitoring Errata Rept ML20069Q3701982-10-31031 October 1982 Socioeconomic Monitoring & Mitigation Rept ML20065R3701982-10-14014 October 1982 Interim Deficiency Rept Re Deferral of Const Activities. Initially Reported on 820623.Commitments Made in Rept,Audit Findings & Response to Violations Deferred Until Restart of Design & Const ML20027B8451982-09-20020 September 1982 First Interim Deficiency Rept Re QA Deficiencies on Allis- Chalmers Butterfly Valves.Initially Reported on 820823.Const Activities Deferred.Final Rept Will Be Submitted After Final Decision Re Completion or Cancellation of Project ML20069D5241982-09-10010 September 1982 Socioeconomic Monitoring & Mitigating Rept,Sept 1981 ML20063L3721982-09-0202 September 1982 First Interim Deficiency Rept Re Failure of Kerotest Valves to Meet Seismic Criteria.Initially Reported on 820804. Negotiations Underway W/Contractor for Return of Valves. Const Activities Deferred.Also Reportable Per Part 21 ML20055A0731982-07-0707 July 1982 First Interim Deficiency Rept Re Nonconformance in Intake Pumping Station Door & Hatch Design,Initially Reported 820604.Final Rept Will Not Be Issued Until Decision to Resume Facility Const Reached ML20055A0791982-07-0606 July 1982 First Interim Deficiency Rept Re Possible Installation of Bolt Anchors in Grant Areas,Initially Reported 820610. Investigation Postponed Until Const Resumed ML20054N0821982-07-0101 July 1982 Final Deficiency Rept Re Excessive Stress on Spray Pond Supply & Bypass Headers,Initially Reported on 820218. Piping Layout Revised & Drawings Revised/Reissued.Seismic Analysis Complete & Isometrics Issued ML20054J9111982-06-23023 June 1982 Part 21 Rept Re Potential Defect in Couplings Drive Element of Dsrv or Dsr Standby Diesel Generator.Affected Licensees Will Be Notified No Later than 820715 ML20054K1531982-06-23023 June 1982 Informs That Final Deficiency Repts for Listed Nonconformances Will Not Be Submitted Until Final Decision Is Made Re Const of Projects ML20054H6821982-06-18018 June 1982 Part 21 Rept Re Pneumatic Actuator Yoke Failure.List of Other Projects W/Similar Equipment Encl ML20054G1121982-06-11011 June 1982 Fourth Interim Deficiency Rept Re Link Rod assembly-Delaval Diesels.Due to Const Deferment Final Deficiency Rept Will Not Be Issued Pending Final Decision on Future of Projects. Also Reportable Per Part 21 ML20054E4111982-06-0101 June 1982 Fourth Interim Deficiency Rept Re Bethlehem Steel Co Galvanized A325 Bolts,Initially Reported on 811029.Const Activities Deferred Until Sufficient Info Indicates Whether Project Should Be Completed or Canceled 1993-12-09
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TENNESSEE VALLEY AUTHORITY CH ATTA NCOG A. TENN ESS EE 37101 400 Chestnut Street Tower II October 1, 1979 Mr. Janes P. O'Reilly, Director Office of Inspection and Enforcement U.S. Nuclear kagulatory Comission Region II - Suite 3100 101 Marietta Strest Atlanta, Georgia 30303
Dear Mr. O'Reilly:
HARTSVILLE AND PHIPPS BEND NUCLEAR PLANTS ALL UNITS - REPORTABLE DEFICIENCY - FAULTY WELDING BY LAKESIDE BRIDGE AND STEEL ON DRYWELL VENT STRUCTURE AND REACTOR PRESSURE VESSEL PEDESTAL (NCR'S HNP-A-038, HNP-A-050, HNP-B-024, PBNP-028)
Initial report of the subject deficiency was made to W. B. Swan, NRC-0IE, Region II, on June 6, 1979. The first interim report of the subject deficiency was submitted on July 5, 1979. In compliance with paragraph 50.55(e) of 10 CFR Part 50, we are enclosing the final report of the subject deficiency. If you have Ly questions regarding this matter, pleasa call Tish Jenkins at FTS 854-2014.
Very truly yours, TENNESSEE VALLEY NJTHORITY L. M. Mills, Manager Nuclear Regulation and Safety Enclosure cc: Mr. Victor Stello, Director (Enclosurs) f Office of Inspection and Enforcement i U.S. Nuclear Regulatory Comission Washington, DC 20555
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HARTSVILLE AND PHIPPS BEND NUCLEAR PLANTS - ALL UNITS FAULTY WELDING BY LAKESIDE BRIDGE AND STEEL ON DRYWELL VENT STRUCTURE AND REACTOR PRESSURE VESSEL PEDESTAL 10CFR50.55(e) REPORT NO. 2 (FINAL)
NCR' S HNP-A-038, HNP-A-050, ENP-B-024, AND PBNP-028 On June 6,1979 TVA notified NRC-0IE Region II, Inspector W. B. Swan, of a potentially reportable 10CFR50.55(e) condition that has 10CFR Part 21 implications regarding a breakdown in the quality control program at Lakeside Bridge and Steel (Lakeside). The breakdown involves the shipment of the drywell vent structure and the reactor pressure vessel (RPV) pedestal by Lakeside with weld metal added to the edges (buttering) which has been found by TVA to contain material contamination causing cracking and enough porosity, lack of fusion, and slag inclusion deemed to be unacceptable per the American Welding Society (AWS), Code Dl.l. An interim report en this deficiency was filed on July 5, 1979. This is the final report en the subject reportable deficiency.
Description of Deficiency Drvwell W nt Structure As a result of the butte. ring problem identified on the reactor pressure vessel shield wall (NCR's HNP-A-037 and ENP-A-043), fabricated by Industrial Engineering Works (IEJ), the TVA construction forces inspected the edges of the drywell vent structure fabricated by Lakeside for similar problems with buttering. The results of a spot check of some of the weld prep edges by radiography revealed that buttering had been performed, and that the buttering contained suf ficient defects to be unacceptable by AWS standards. Subsequently, NCR HNP-A-038 was written to document this nonconfoming condition.
None of the drywell vent structures for the Phipps Bend Nuclear Plant (PBNP) had been shipped from Lakeside; therefore, no NCR was written for PBNP.
Reactor Pressure Vessel Pedestal During field erection of the reactor pressure vessel (RPV) pedescal fabricated by Lakeside, a routine veld inspection revealed cracks in an area outside of the zone of the TVA weld. These cracks have a horizontal orientation and appear to be from 1/8 inch to 3/8 inch below the circumferential veld which joins the ring girder to the shell section. Further visual inspection revealed similar cracks apparent at several other locations on the RPV pedestal. The results of preliminary liquid penetrant examination and acid etching indicate that the cracks developed along a line where the vendor apparently fused weld metal to the top edge of the parent metal (i.e.,
buttered the weld joint) to meet dimensional and/or edge geometry require =ents.
Some of the buttered edges which were radiographed by TVA contain sufficient amounts of porosity, lack of fusion, and slag inclusion to be deemed unacceptable under AWS Code Dl.1.
l ]i J7' 9, 107c m
All segments of the RPV pedeetal for PBNP unit 1 are onsite and none of
. the. RPV pe.destal_for PDhT unic 2.is cusite.
Cause of the Deficiency Drywell Vent Structure The ccuse of the bettering defs.ciencies is due to unaccepteble work which was not given suf ficinct NDE to result in f ts rejection and subsequent replacement. The existence of the buttering deficiencies can be attributed to a disagreemcnt betvean Lakeside and the technical engineer (GE) over whether the procurement specification classifies buttering as e repair or not, and what NDE is r? quired when buccaring is performed. Both organi-zacions agree that the buttering that was performed contains sufficient defects to be considered unacceptable per Nw'$ Code Dl.l.
Reactor Pressure Vessel Fedeceal Chemical and metallurgical examir.ation of a specimen removed from a cracked area of the RPV pedestal revealed the cause of the cracking to be copper contamination in an area which was buttered to meet dimensional requirements. The origin of the copper 16 due to inadvertonc melting of copper backup bars used in conjunction with the buttering procedure.
Safety Implications Bad the defects in the buttering performed by Lakesida, or the crack in the HTN Al RPV pedsstal tone undetected, the structural integrity of the RPV pedestal and drywell vent structurs could be jeopardized under dynamic leading during an earthquake or LOCA.
Corrective Action A. Repair of Defective Buttering For all RPV pedestal and drywell vent structure segments shipped by Lakeside before June .1, 1979, TVA vill perform the follcwing in accordance with procedures that have been approved by the technical engineer (GE) during the field erection of the structures.
- 1. Locate all buttered edges by either visual inspcetion, acid etching, or radiography, or by using the Lakeside assembly records.
- 2. Perform 100-percent RT inspection on all buttered edges to locate all defects.
- 3. Remove unacceptable defects per approved procedure.
4 Perform MT or PT inspection to ensure sound metal where defects are removed.
- 5. Repair excavated area using a procedure approved by the technical engineer.
- 6. Perform 100-percent RT of the areas that are repaired. Steps 3 through 6 will be repeated until an acceptable quality buttering weld is attained.
73 ' O 7, J9 us
For all RPV pedestal and drywell vent structure segments shipped from Lakeside on or after June 1, 1979, Lakeside will perform 100-percent RT inspection and repair, as necessary, all buttered selda before the segments are shipped to TVA.
B. Cracks in the Hartsville Unit Al MPV Pedestal Steps as follow were used to repair the cracking in the RPV pedestal:
- 1. The entire circumference of both the inner and outer cylindrical shell structures were cleared and etched with nitric acid / water solution in the area shere cracking was evident or suspected.
Previous teste on a sample with known levels of copper contamination indicated that such an etching procedure would reveal the presence of copper by " darkening" of the veld beads into which copper had penetrated during welding.
- 2. Areas exhibiting the presence of copper from the etching, see Item B.l above, were air-are gouged to a depth of 3/4 inch and ground te bright metal.
- 3. These areas were then magnetic particle inspected to ensure sound metal where the copper contaminated areas were removed.
- 4. Excavated areas were repaired using the same procedure (SMAW process with AWS E7018 electrode) as used for the adjacent field weld.
- 5. Completed repairs were given 100-percent examination radiographically and by the magnetic particle method to assure an acceptable repair weld.
Means Taken to Prevent Recurrence A. Repairs Made by Buttering On May 2, 1979, GE sent letter No. GLB-61 to Lakeside stating GE's si.e. , the technical engineer's) interpretation of the requirements of the procurement specification with regard to buttering as follows:
- 1. Weld edge preparation with weld buildup material (buttering) shall require 100-percent radiography using acceptance standards of the applicable code.
- 2. If the supplier plans to use weld filler metal (buttering) in his fabrication process, a procedure should be submitted te the technical engineer for approval before buttering.
This action on GE's part should prevent any further misinterpretation by Lakeside of the procurement specification with regard to NDE and approval of buttering procedures. Also, the letters noted in part B should prevent future problems with buttering on this and other IVA nuclear plant.strue_tural steel. contracts.
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B. Cracks in the Hartsville Unit Al RPV Pedestal On July 26, 1979, TVA sent letters to all companies holding contracts to provide structural steel for TVA nuclear plants describing the cracking problem at Hartsville Nuclear Plant and requesting that they refrain from using copper backup bars on their contracts with TVA.
The letters further indicated requirements for TVA approval of weld repair procedures which should detail how the repairs will be made and subsequent nondestructive examination requirements for the repairs.
These notifications should prevent recurrence of this problem in the future for TVA nuclear piants.
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