ML20008E665

Second Interim Deficiency Rept Re Cable Tray Hanger Design Previously Identified on 801205.Re-evaluation of Hanger Design Continuing in Order to Identify Connections Which Require Mod.Next Rept to Be Provided by 810515

ML20008E665
Person / Time
Site:	South Texas
Issue date:	02/27/1981
From:	Oprea G HOUSTON LIGHTING & POWER CO.
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 10CFR-50.55E, SFN:V-0530, ST-HL-AE-628, NUDOCS 8103090380
Download: ML20008E665 (3)

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February 27, 1981 ST-HL-hE-628 SFN: V-0530 0

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Mr. Karl Seyfrit

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Director, Region IV , i  ;

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611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76012 A  % * @/ A f

Dear Mr. Seyfrit:

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• South Texas Project Units 1&2 Docket Nos. STN 50-498, STN 50-499 Second Interim Report Concerning Cable Tray Hanger Design As previously identified, on December 5,1980, in accordance with 10CFR-50.55(e), Houston Lighting & Power Company notified your office of an item in-volving the cable tray hanger design for the South Texas Project. During a design review it was found that for one type of hanger design, a connection be-tween a hanger beam and a vertical leg was based in part on an improper cross reference to a standard design.

The first interim report also identified several actions undertaken by Houston Lighting & Power. This report provides a status of those activities.

1) The re-evaluation of the cable tray hanger design is continuing in order to identify connections which will require modification.

2) The analyses perfonned to date continues to indicate that although some connections will require modifications to re-establish design margins, none would fail if left uncorrected.

3) The design control system has been reviewed and subsequently changed to strengthen the design controls and to require verifi-cation of the respective hanger design prior to erection of hangers.

The next interim report will be sent to you on May 15, 1981. If there are any questions about this item, please contact Mr. Michael E. Powell at (113) 676-3592.

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Houston Lighting & Power Company February 27,1981 I ST-HL-AE-628 SFN: V-0530 t Page 2  ;

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President i  !

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houuon Ughting & Power Oimpany February 27, 1981 ST-HL-AE-628 cc: J. H. Goldberg SFN: V-0530 D. G. Barker Page 3 Howard Pyle R. L. Waldrop H. R. Dean D. R. Beeth J. D. Parsons G. B. Painter L. K. English J. W. Briskin R. A. Frazar H. S. Phillips (NRC)

J. O. Read (Read-Poland,Inc.)

M. D. Schwarz (Baker & Botts)

R. Gordon Gooch (Baker & Botts)

J. R. Newman (Lowenstein, Newman, Reis & Axelrad)

Director, Office of Inspection & Enforcement Nuclear Regulatory Comission Washington, D. C. 20555 M. L. Borchelt Charles Bechoefer, Esquire Executive Vice President Chairman, Atomic Safety & Licensing Board Central Power & Light Company U. S. Nuclear Regulatory Comission P. O. Box 2121 Washington, D. C. 20555 Corpus Christi, Texas 78403 R. L. Range Dr. James C. Lamb, III Central Power & Light 313 Woodhaven Road P. O. Box 2121 Chapel Hill, North Carolina 27514 Corpus Christi, Texas 78403 R. L. Hancock Dr. Emeth A. Luebke Director of Electrical Utilities Atomic Safety & Licensing Comission City of Austin U. S. Nuclear Regulatory Comission P. O. Box 1088 Washington, D. C. 20555 Austin, Texas 78767 T. H. Muehlenbeck Citizens for Equitable Utilities City of Austin c/o Ms. Peggy Buchorn P. O. Box 1088 Route 1, Box 1684 Austin, Texas 78767 Brazoria, Texas 77422 J. B. Poston Pat Coy Asst. General Manager of Operations Citizens Concerned About Nuclear Power City Public Service Board 5106 Casa Oro P. O. Box 1771 San Antonio, Texas 77422 San Antonio, Texas 78296 A. vonRosenberg Betty Wheeler City Public Service Board Hoffman, Steeg & Wheeler P. O. Box 1771 1008 S. Madison San Antonio, Texas 78296 Amarillo, Texas Brian E. Berwick Bernard M. Bordenick Asst. Attorney for the State of Texas Hearing Attorney P. O. Box 12548 Office of the Executive Legal Director Capitol Station U. S. Nuclear Regulatory Comission Austin, Texas 78711 Washington, D. C. 20555