ML19256F200

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First Interim Deficiency Rept Re Nonconformance in Metal Conduits.Damaged Threads,Burrs & Flaked Galvanized Coating Detected.Defective Parts Will Be Returned to Triangle Pwc & All Conduits Inspected
ML19256F200
Person / Time
Site: Black Fox, Yellow Creek
Issue date: 11/26/1979
From: Mills L
TENNESSEE VALLEY AUTHORITY
To:
References
NCR-YC-034, NCR-YC-34, NUDOCS 7912030199
Download: ML19256F200 (2)


Text

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. TENNESSEE VALLEY AUTPORITY CH ATTANOOGA. TENNESSEE 37401 400 Chestnut Street Tower II November 26, 1979 Mr. James P. O'Re 11y, Director Office of Inspecti and Enforcement U.S. Nuclear Regular ry Commission Region II - Suite 310 101 Marietta Street Atlanta, Georgia 30303

Dear Mr. O'Reilly:

YELLOW CREEK NUCLEAR PLANT UNITS 1 AND 2 - DEFECTIVE ELECTRICAL CONDUIT -

NCR YC-034 Rev. 1 - FIRST INTERIM REPORT on October 25, 1979, M. J. Gouge NOC-0IE Region II, was informed that the subject nonconformance was determined to be reportable in accord-ance with 10 CFR 50.55(e). Enclosed is our first interim report. We expect to submit our next report, by February 22, 1980.

If you have anv questions concerning this matter, please get in touch with D. L. Lambert at FTS 854-2581.

Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills,Ifanager Nuclear Regulation and Safety Enclosure -

cc Mr. Victor Stallo, Jr., Director (Enclosure)

Office of Inspection and Enforcanci.t U.S. Nuclear Regulatory Commission Washington, DC 20555 1455 342 B'si (

t An Ecual Opportunity Employer

ENCLOSURE YELLOW CREEK NUCLEAR PLANT UNITS 1 AND 2 DEFECTIVE ELECTRICAL CONDUIT NCR YC-034 REV. 1 10 CFR 50.55(e)

FIRST INTERIM 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, 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 piping is thought to have been embedded.

Interim Progress TVA is inspecting all conduit that has not been embedded, and any found defective will be returned to Triangle PWC. TVA is working to identify if defective conduit has been embedded and is taking steps to correct the defects should any be found. Triangle PWC is examining their manu-facturing process to identify the reason (s) for the defects.

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