ML19296D151
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| ML19296D151 | |
| Person / Time | |
|---|---|
| Site: | Yellow Creek  |
| Issue date: | 02/22/1980 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML19296D148 | List: |
| References | |
| NCR-YC-034-R1, NCR-YC-34-R1, NUDOCS 8002290410 | |
| Download: ML19296D151 (2) | |
Similar Documents at Yellow Creek | |
|---|---|
Category:DEFICIENCY REPORTS (PER 10CFR50.55E & PART 21)
MONTHYEARML20077G6661983-07-27027 July 1983
[Table view]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 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 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 ML20083P6301983-01-28028 January 1983 Second Revised Final Deficiency Rept Re Welds on Component Cooling Water HX Mfg by Joseph Oat Corp.Initially Reported on 810306.Defects Removed by Grinding.Also Reported Per Part 21 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 ML20065H8751982-09-27027 September 1982 First Interim Deficiency Rept Re Failure to Consider Seismic & Inertial Loadings on Ladders,Platforms & Walkways. Initially Reported on 820826.Const Activities Deferred Until Decision Re Const Completion Reached ML20063J9461982-08-27027 August 1982 Final Deficiency Rept Re Source Insp.Initially Reported 810120.Weld Inspectors Trained & Certified,Shop Surveillance Increased & Personnel Relocated to Provide More Intense Program of Source Insp.Full Compliance Achieved 820514 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 ML20054J9211982-06-22022 June 1982 Seventh Interim Deficiency Rept for Deficiencies 2,3,5 & 14 Re QA Audit M80-7,initially Reported 800923.Const Activities Deferred Until Sufficient Info Compiled ML20054G4161982-06-10010 June 1982 Final Deficiency Rept Re QA Deficiencies at Morgan Engineering,Inc,Initially Reported on 820512.Contract W/Morgan Engineering Canceled Due to Deferred Status of Const ML20052G5881982-04-27027 April 1982 Sixth Interim Deficiency Rept Re Source Insp,Initially Reported on 810120.Util Continuing Evaluation of Results of Insp of Equipment & Matl Purchased & of Generic Implications.Next Rept Due by 820827 ML20054A8591982-03-30030 March 1982 Fifth Interim Deficiency Rept Re Cooling Tower Makeup Control,Initially Reported on 810423.Const Activities Being Deferred to Minimize Expenditures & Effort,Pending Decision on Project Cancellation ML20050B0221982-03-19019 March 1982 Final Deficiency Rept 2 Re Failure of Transamerica Delaval to Correct Violations Identified During Audits 79V-38 & 80V-39 Promptly,Due to Improper QA Program Implementation, Initially Reported on 820114.Also Reported Per Part 21 ML20042A3131982-03-0909 March 1982 Final Deficiency Rept Re Const QA Program Procedural Control Deficiencies,Initially Reported 810731.Const Engineering Procedures Prepared & Revised for Configuration Control of drawings,site-originated Drawings & Field Change Requests ML20049J4391982-03-0303 March 1982 First Interim Deficiency Rept Re Check Valve Leak in Air Start Sys of Standing Diesel Generators,Initially Reported on 820209.Problem Under Investigation by Vendor.Next Rept Expected by 820528.Also Reported Per Part 21 ML20049J4991982-03-0101 March 1982 Final Deficiency Rept Re Fillet Weld Misspec,Initially Reported 801210.General Const Spec G-29C Revised to Clarify Const Requirements for Skewed T-joints.Info Emphasizing Aisc/Aws Requirements Will Be Issued by 820401 ML20069C1361982-02-22022 February 1982 Sixth Interim Deficiency Rept Re QA Audit M80-7 Deficiencies 2,3,5 & 14,initially Reported 800923. Deficiencies Still Being Reviewed.Next Rept to Be Submitted by 820624 ML20071H9341982-02-18018 February 1982 Fifth Interim Deficiency Rept Re Defective Welds Discovered During Visual Insps Between June & Dec 1980,initially Reported on 810120.Generic Implications of Source Insp Breakdown Will Be Evaluated.Next Rept Expected by 820427 ML20041A4241982-02-10010 February 1982 Deficiency Rept Re Failure of Transamerica Delaval to Promptly Correct Deficiencies,Initially Reported 820114. Deficiency Sheet Discussed W/Delaval Mgt.Next Rept by 820320.Also Reported Per Part 21 ML20041A6241982-02-0505 February 1982 First Interim Deficiency Rept Re Unevaluated Missile Source,Initially Reported on 820108.Probability of Fly Wheel Failure Under Investigation.Deficiency Will Be Reviewed for Possible Generic Applications ML20069B8731982-01-22022 January 1982 Third Interim Rept Re Tornado Depressurization Design Deficiencies,Initially Reported 810402.Ventilation Opening Added in Exterior Door of Each Stairwell.Stairwell Doors to Main Bldg Will Be Pressure Doors.Next Rept by 821020 ML20039E1471981-12-29029 December 1981 First Supplemental Rept Re Deficient Welds on Component Cooling Water Heat Exchangers,Initially Reported 810306. Further Insp Determined Defects Advanced Beyond Superficial. NRC to Be Informed of Actions.Also Reported Per Part 21 ML20069B2891981-12-16016 December 1981 Third Interim Deficiency Rept Re QA Compliance W/Ansi N45.2.11,initially Reported 810731.Evaluation of Deficiency & Possible Corrective Action Continuing.Next Rept by 820310 ML20062N3041981-12-0808 December 1981 Fourth Interim Deficiency Rept Re Cooling Tower Makeup Control,Initially Reported 810423.Analysis of safety-related Requirements Imposed by Design Criteria Ongoing.Next Rept by 820318 ML20038C7381981-12-0707 December 1981 Fourth Interim Deficiency Rept Re Weld Defects Undiscovered by Source Insp,Initially Reported 810120.Schedule of Source Welding Insps Is Complete.Util Is Reviewing & Evaluating Insps.Next Rept Will Be Submitted by 820204 ML20038C9151981-12-0404 December 1981 Fourth Interim Deficiency Rept Re Fillet Weld Misspec, Initially Reported on 801210.Engineers & Designers Have Been Alerted to Aisc/Aws Requirements for Limiting Angles for Skewed Tee Joints.Next Rept Due 820302 ML20011A9881981-10-23023 October 1981 Final Deficiency Rept Re Engineer Failure to Verify Preliminary Seismic Analyses Prior to Final Design Completion Initially Reported 810212.Final Evaluations Reveal That No Design Changes Are Required ML20011A6341981-10-0707 October 1981 Second Interim Deficiency Rept Re QA Program Compliance W/ ANSI N45.2.11,initially Reported on 810731.Evaluation of Deficiency & Corrective Actions Ongoing.Next Rept Expected by 811223 ML20010G9131981-09-0909 September 1981 Second Interim Deficiency Rept Re Tornado Depressurization Design,Initially Reported on 810402.Ventilation Analysis for Essential Raw Cooling Water Pumping Station Complete.Final Documentation in Progress.Next Rept Expected 820127 ML20010G8191981-09-0909 September 1981 Final Deficiency Rept Re Unconservative Mass Load Ratings for Cantilever Supports Supplied by Bechtel,Initially Reported 810810.Also Reported Per Part 21.Bechtel Has Modified Computer Code Input & Sent Corrected Data to Util ML20010G2081981-09-0404 September 1981 Third Interim Deficiency Rept Re Weld Defects Discovered During Source Insp,Initially Reported on 810120.Util Scheduling Special Team of Quality Engineering Branch Employees to Survey Each Site.Next Rept by 811208 ML20010E9101981-08-31031 August 1981 First Interim Deficiency Rept Re QA Program Failure to Comply W/Ansi N45.2.11,initially Reported on 810731.Caused by Lack of Control Over Drawing Procedures.Next Rept to Be Submitted by 811015 ML20010D1871981-08-17017 August 1981 Revised Final Deficiency Rept Re Lamination of Soil in Emergency Raw Cooling Water Spray Pond,Initially Reported on 810204.Evaluation Conducted to Determine Effect of Laminations.Table Encl ML20010C4561981-08-12012 August 1981 Third Interim Deficiency Rept Re Fillet Weld Misspec Initially Reported 801210.Util Is Reviewing All TVA & Vendor Designs Governed by AISC Spec & Aws Structural Welding Code. Structural Integrity of Joints Not Impaired by Misspec ML20010C7031981-08-11011 August 1981 Final Deficiency Rept Re Lamination of Soil in Essential Raw Cooling Water Spray Pond,Initially Reported on 810204.No Significant Lamination to Cause Adverse Impact on Seepage or Structural Integrity of Liner ML20009H4311981-07-31031 July 1981 Final Deficiency Rept Re Failure to Implement Design Criteria,Initially Reported on 810401.C-E & Util Developed Recommended Design to Alleviate Deficiency in Design of Spent Fuel Rack Embedments ML20009G6561981-07-27027 July 1981 Final Deficiency Rept Re Rebar Left Out of Concrete Pour, Originally Reported on 810629.Caused by Craft,Engineer & QC-civil Field Inspector Error.Top Face Bars of Pour W-H6 Spliced W/Grouted Splice Bars.Checklist Procedure Improved ML20009G1261981-07-24024 July 1981 Second Revised Final Deficiency Rept Re Welds on Gas Stripper Module,Initially Reported 801008.Norwalk Fabricators Will Remove Nonconforming Piping.Work Will Be Completed by 820301.Part 21 Applicable to Deficiency ML20009F4761981-07-17017 July 1981 Second Interim Deficiency Rept,Initially Reported on 810212, Re Unverified Seismic Analysis for Final Design.Final Seismic Structural Analysis Has Been Checked & Verified.Next Rept Will Be Submitted by 811028 ML20009F5781981-07-0808 July 1981 Second Interim Deficiency Rept Re Cooling Tower Makeup Control,Initially Reported 810423.No Addl Info to Rept at Present.Next Rept Will Be Submitted by 810819 ML20005A4101981-06-23023 June 1981 Second Interim Deficiency Rept Re Source Insp,Initially Reported on 810120.Generic Implications Re Breakdown in Quality Sys at Source Insp Level Are Being Studied.Next Rept Will Be Submitted by 810904 ML19352A9801981-05-28028 May 1981 Revised Final Deficiency Rept,Originaly Reported on 800321, Re Improper Documentation & Utilization of Computer Program Inertia.Inertia & Bigdyna Properly Utilized & Only Seismic Analysis for Control Bldg Affected ML20004C0811981-05-26026 May 1981 First Interim Deficiency Rept Re Cooling Tower Makeup Control,Initially Submitted 810423.Analysis of safety-related Requirements Imposed by Design Criteria Is in Progress ML19350D8031981-05-14014 May 1981 Final Deficiency Rept,Initially Reported 810414,re Nonconforming Concrete,Rebar & Bolt Coupler Placement in Fuel Bldg.Caused by Personnel Error & Misinterpreting Drawings.Slab Will Be Repoured by 810529 ML20008F9841981-05-0404 May 1981 First Interim Deficiency Rept,Initially Reported 810402,re Tornado Depressurization Design Deficiencies.Ventilation Analysis for Intake & Essential Raw Cooling Water Pumping Stations Performed.Next Rept Will Be Submitted by 810909 ML20008F8531981-05-0101 May 1981 Part 21 Rept Re C-E Failure to Implement Design Criteria for Seal Welding to Anchor Bolt,Initially Reported 810401. Channel Will Be Machined Between Bolt Locations & Liner Seal Weld.Next Rept by 810804 ML20003G4941981-04-23023 April 1981 Final Rept Re Error in Tpipe Program,Initially Reported on 810327.Corrected Version of Tpipe Program Verified & Put Into Production.Poll Showed No Incorrect Design Info Issued from Using Error ML20009F5591981-04-22022 April 1981 Revised Final Deficiency Rept Re Welds on Gas Stripper Module,Initially Reported 801008.Piping Which Failed to Meet ASME Code Requirements Will Be Returned to Supplier for Repairs.Deficiency Also Reported Per Part 21 ML20009F6331981-04-21021 April 1981 Final Deficiency Rept Re Fl Steel Corp Undersized Fillet Welds W/Craters,Excessive Undercut,Lack of Fusion & Porosity Initially Reported 801121.Welds Repaired by Fl Steel Following Insp 1983-07-27 Category:TEXT-SAFETY REPORT MONTHYEARML20153E5011988-08-29029 August 1988
[Table view]NRC Staff Evaluation of Site Stabilization Plan for Withdrawal of CPPR-172 & CPPR-173 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 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 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 ML20083P6301983-01-28028 January 1983 Second Revised Final Deficiency Rept Re Welds on Component Cooling Water HX Mfg by Joseph Oat Corp.Initially Reported on 810306.Defects Removed by Grinding.Also Reported Per Part 21 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 ML20065H8751982-09-27027 September 1982 First Interim Deficiency Rept Re Failure to Consider Seismic & Inertial Loadings on Ladders,Platforms & Walkways. Initially Reported on 820826.Const Activities Deferred Until Decision Re Const Completion Reached ML20063J9461982-08-27027 August 1982 Final Deficiency Rept Re Source Insp.Initially Reported 810120.Weld Inspectors Trained & Certified,Shop Surveillance Increased & Personnel Relocated to Provide More Intense Program of Source Insp.Full Compliance Achieved 820514 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 ML20054J9211982-06-22022 June 1982 Seventh Interim Deficiency Rept for Deficiencies 2,3,5 & 14 Re QA Audit M80-7,initially Reported 800923.Const Activities Deferred Until Sufficient Info Compiled ML20054G4161982-06-10010 June 1982 Final Deficiency Rept Re QA Deficiencies at Morgan Engineering,Inc,Initially Reported on 820512.Contract W/Morgan Engineering Canceled Due to Deferred Status of Const ML20052G5881982-04-27027 April 1982 Sixth Interim Deficiency Rept Re Source Insp,Initially Reported on 810120.Util Continuing Evaluation of Results of Insp of Equipment & Matl Purchased & of Generic Implications.Next Rept Due by 820827 ML20054A8591982-03-30030 March 1982 Fifth Interim Deficiency Rept Re Cooling Tower Makeup Control,Initially Reported on 810423.Const Activities Being Deferred to Minimize Expenditures & Effort,Pending Decision on Project Cancellation ML20050B0221982-03-19019 March 1982 Final Deficiency Rept 2 Re Failure of Transamerica Delaval to Correct Violations Identified During Audits 79V-38 & 80V-39 Promptly,Due to Improper QA Program Implementation, Initially Reported on 820114.Also Reported Per Part 21 ML20042A3131982-03-0909 March 1982 Final Deficiency Rept Re Const QA Program Procedural Control Deficiencies,Initially Reported 810731.Const Engineering Procedures Prepared & Revised for Configuration Control of drawings,site-originated Drawings & Field Change Requests ML20049J4391982-03-0303 March 1982 First Interim Deficiency Rept Re Check Valve Leak in Air Start Sys of Standing Diesel Generators,Initially Reported on 820209.Problem Under Investigation by Vendor.Next Rept Expected by 820528.Also Reported Per Part 21 ML20049J4991982-03-0101 March 1982 Final Deficiency Rept Re Fillet Weld Misspec,Initially Reported 801210.General Const Spec G-29C Revised to Clarify Const Requirements for Skewed T-joints.Info Emphasizing Aisc/Aws Requirements Will Be Issued by 820401 ML20069C1361982-02-22022 February 1982 Sixth Interim Deficiency Rept Re QA Audit M80-7 Deficiencies 2,3,5 & 14,initially Reported 800923. Deficiencies Still Being Reviewed.Next Rept to Be Submitted by 820624 ML20071H9341982-02-18018 February 1982 Fifth Interim Deficiency Rept Re Defective Welds Discovered During Visual Insps Between June & Dec 1980,initially Reported on 810120.Generic Implications of Source Insp Breakdown Will Be Evaluated.Next Rept Expected by 820427 ML20041A4241982-02-10010 February 1982 Deficiency Rept Re Failure of Transamerica Delaval to Promptly Correct Deficiencies,Initially Reported 820114. Deficiency Sheet Discussed W/Delaval Mgt.Next Rept by 820320.Also Reported Per Part 21 ML20041A6241982-02-0505 February 1982 First Interim Deficiency Rept Re Unevaluated Missile Source,Initially Reported on 820108.Probability of Fly Wheel Failure Under Investigation.Deficiency Will Be Reviewed for Possible Generic Applications ML20069B8731982-01-22022 January 1982 Third Interim Rept Re Tornado Depressurization Design Deficiencies,Initially Reported 810402.Ventilation Opening Added in Exterior Door of Each Stairwell.Stairwell Doors to Main Bldg Will Be Pressure Doors.Next Rept by 821020 ML20039B5681981-12-30030 December 1981 Yellow Creek Nuclear Plant Socioeconomic Monitoring & Mitigation Rept. ML20039E1471981-12-29029 December 1981 First Supplemental Rept Re Deficient Welds on Component Cooling Water Heat Exchangers,Initially Reported 810306. Further Insp Determined Defects Advanced Beyond Superficial. NRC to Be Informed of Actions.Also Reported Per Part 21 ML20069B2891981-12-16016 December 1981 Third Interim Deficiency Rept Re QA Compliance W/Ansi N45.2.11,initially Reported 810731.Evaluation of Deficiency & Possible Corrective Action Continuing.Next Rept by 820310 ML20062N3041981-12-0808 December 1981 Fourth Interim Deficiency Rept Re Cooling Tower Makeup Control,Initially Reported 810423.Analysis of safety-related Requirements Imposed by Design Criteria Ongoing.Next Rept by 820318 ML20038C7381981-12-0707 December 1981 Fourth Interim Deficiency Rept Re Weld Defects Undiscovered by Source Insp,Initially Reported 810120.Schedule of Source Welding Insps Is Complete.Util Is Reviewing & Evaluating Insps.Next Rept Will Be Submitted by 820204 ML20038C9151981-12-0404 December 1981 Fourth Interim Deficiency Rept Re Fillet Weld Misspec, Initially Reported on 801210.Engineers & Designers Have Been Alerted to Aisc/Aws Requirements for Limiting Angles for Skewed Tee Joints.Next Rept Due 820302 ML20011A9881981-10-23023 October 1981 Final Deficiency Rept Re Engineer Failure to Verify Preliminary Seismic Analyses Prior to Final Design Completion Initially Reported 810212.Final Evaluations Reveal That No Design Changes Are Required ML20011A6341981-10-0707 October 1981 Second Interim Deficiency Rept Re QA Program Compliance W/ ANSI N45.2.11,initially Reported on 810731.Evaluation of Deficiency & Corrective Actions Ongoing.Next Rept Expected by 811223 ML20010G9131981-09-0909 September 1981 Second Interim Deficiency Rept Re Tornado Depressurization Design,Initially Reported on 810402.Ventilation Analysis for Essential Raw Cooling Water Pumping Station Complete.Final Documentation in Progress.Next Rept Expected 820127 ML20010G8191981-09-0909 September 1981 Final Deficiency Rept Re Unconservative Mass Load Ratings for Cantilever Supports Supplied by Bechtel,Initially Reported 810810.Also Reported Per Part 21.Bechtel Has Modified Computer Code Input & Sent Corrected Data to Util ML20010G2081981-09-0404 September 1981 Third Interim Deficiency Rept Re Weld Defects Discovered During Source Insp,Initially Reported on 810120.Util Scheduling Special Team of Quality Engineering Branch Employees to Survey Each Site.Next Rept by 811208 ML20010E9101981-08-31031 August 1981 First Interim Deficiency Rept Re QA Program Failure to Comply W/Ansi N45.2.11,initially Reported on 810731.Caused by Lack of Control Over Drawing Procedures.Next Rept to Be Submitted by 811015 ML20010D1871981-08-17017 August 1981 Revised Final Deficiency Rept Re Lamination of Soil in Emergency Raw Cooling Water Spray Pond,Initially Reported on 810204.Evaluation Conducted to Determine Effect of Laminations.Table Encl ML20010C4561981-08-12012 August 1981 Third Interim Deficiency Rept Re Fillet Weld Misspec Initially Reported 801210.Util Is Reviewing All TVA & Vendor Designs Governed by AISC Spec & Aws Structural Welding Code. Structural Integrity of Joints Not Impaired by Misspec ML20010C7031981-08-11011 August 1981 Final Deficiency Rept Re Lamination of Soil in Essential Raw Cooling Water Spray Pond,Initially Reported on 810204.No Significant Lamination to Cause Adverse Impact on Seepage or Structural Integrity of Liner ML20009H4311981-07-31031 July 1981 Final Deficiency Rept Re Failure to Implement Design Criteria,Initially Reported on 810401.C-E & Util Developed Recommended Design to Alleviate Deficiency in Design of Spent Fuel Rack Embedments ML20009G6561981-07-27027 July 1981 Final Deficiency Rept Re Rebar Left Out of Concrete Pour, Originally Reported on 810629.Caused by Craft,Engineer & QC-civil Field Inspector Error.Top Face Bars of Pour W-H6 Spliced W/Grouted Splice Bars.Checklist Procedure Improved ML20009G1261981-07-24024 July 1981 Second Revised Final Deficiency Rept Re Welds on Gas Stripper Module,Initially Reported 801008.Norwalk Fabricators Will Remove Nonconforming Piping.Work Will Be Completed by 820301.Part 21 Applicable to Deficiency ML20009F4761981-07-17017 July 1981 Second Interim Deficiency Rept,Initially Reported on 810212, Re Unverified Seismic Analysis for Final Design.Final Seismic Structural Analysis Has Been Checked & Verified.Next Rept Will Be Submitted by 811028 ML20009F5781981-07-0808 July 1981 Second Interim Deficiency Rept Re Cooling Tower Makeup Control,Initially Reported 810423.No Addl Info to Rept at Present.Next Rept Will Be Submitted by 810819 ML20005A4101981-06-23023 June 1981 Second Interim Deficiency Rept Re Source Insp,Initially Reported on 810120.Generic Implications Re Breakdown in Quality Sys at Source Insp Level Are Being Studied.Next Rept Will Be Submitted by 810904 ML19352A9801981-05-28028 May 1981 Revised Final Deficiency Rept,Originaly Reported on 800321, Re Improper Documentation & Utilization of Computer Program Inertia.Inertia & Bigdyna Properly Utilized & Only Seismic Analysis for Control Bldg Affected ML20004C0811981-05-26026 May 1981 First Interim Deficiency Rept Re Cooling Tower Makeup Control,Initially Submitted 810423.Analysis of safety-related Requirements Imposed by Design Criteria Is in Progress ML19350D8031981-05-14014 May 1981 Final Deficiency Rept,Initially Reported 810414,re Nonconforming Concrete,Rebar & Bolt Coupler Placement in Fuel Bldg.Caused by Personnel Error & Misinterpreting Drawings.Slab Will Be Repoured by 810529 ML20008F9841981-05-0404 May 1981 First Interim Deficiency Rept,Initially Reported 810402,re Tornado Depressurization Design Deficiencies.Ventilation Analysis for Intake & Essential Raw Cooling Water Pumping Stations Performed.Next Rept Will Be Submitted by 810909 ML20008F8531981-05-0101 May 1981 Part 21 Rept Re C-E Failure to Implement Design Criteria for Seal Welding to Anchor Bolt,Initially Reported 810401. Channel Will Be Machined Between Bolt Locations & Liner Seal Weld.Next Rept by 810804 ML20003G4941981-04-23023 April 1981 Final Rept Re Error in Tpipe Program,Initially Reported on 810327.Corrected Version of Tpipe Program Verified & Put Into Production.Poll Showed No Incorrect Design Info Issued from Using Error 1988-08-29 |
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ENCLOSURE YELLOW CREEK NUCLEAR PLANT UNITS 1 AND 2 DLFECTIVE METAL CONDUlT NCR YC-034, REVISION 1 10 CFR 50.55(e)
FINAL REPORT Description of Deficiency Defective intermediate metal conduit, manufactured by Triangle PWC of New Brunswick, New Jersey, has been received at the site. The defects have been identified as damaged threads ,(burrs and out of round) and flaking of the galvanized coating. This conduit is for use as electrical conduit in both Class IE and non-Class IE applications. A portion of the defective conduit was embedded in concrete before the deficiency was discovered.
Safety Implications Statement Had this deficiency gone uncorrected, the possibility exists for the bad threads cutting the jacket of cable being pulled through the conduit.
While any damage most likely would not be severe enough to damage the conductor, this cannot be ensured. Therefore, it will be conservatively assumed that the bad threads could damage the cable to the extent the conductor is exposed. If the damaged cable is safety related, the cable could be shorted and could thereby adversely affect plant safety. There is no safety concern with the flaking of the galvanizing.
Corrective Action IVA is in the process of inspecting all Triangle PWC conduit, and defective conduit will be returned to Triangle (this inspection should be completed by March 10, 1980). For the embedded conduit which could be examined, the ends will be inspected for damaged threads and, if found, reamed to remove the damage.
Also, a list was made of all conduit embedded before August 17, 1979, at which time it was decided to not install damaged conduit. When cables are pulled in these conduits, the following tests will be made on the cable:
- 1. All cables below SkV shall receive a 500-volt meggar test for a minimum of 15 seconds to check the insulation resistance.
Acceptance criterion is 1 megaohm per 100 volts or 1 megaohm minimum for 600-volt (or less) cables.
- 2. A. All power cables used for 6.9-kV service (and above) shall receive a 2.5-kV meggar test with a duration of one minute minimum to check the insulation resistance. The minimum acceptable value shall be 7 megaohms.
8002290 Y/ O
B. Immediately after the meggar test, a dc high-potential test
. shall be performed on all 8-kV power cables. The applieu voltage shall be 35 kV (applied voltage shall be 55 kV for 15-kV cables). The duration of the dc voltage test shall be 15 minutes for shielded cables and 5 minutec for nonshieldad cables. Leakage current readings shall be taken every 15 seconds for the first minute and e'rery minute thereaf ter until test completion.
- 3. Any cables found defective shall be pulled out and new cables installed and tested as above.
Triangle PWC has determined that the thread problems were because of a quality control problem which has since been corrected. The flaking problem was found to be because of an improper galvanizing technique and it also has been corrected.
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