ML19296D880

Forwards Second Interim Deficiency Rept Re Failure of Two post-tensioning Field Anchorheads.Requests Extension Until 800515 for Submittal of Final Rept

ML19296D880
Person / Time
Site:	Byron
Issue date:	02/29/1980
From:	Naughton W COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19296D881	List: ML19296D880 ML19296D886
References
NUDOCS 8003130401
Download: ML19296D880 (1)

Text

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Commonwealth Edison one First Natioral Ptaza. C?ucago. Ilknots Address Reply to: Post Office Box 767 -

Chicago, Illinois 60690 February 29, 1980 Mr. James G. Keppler, Director Directorate of Inspection and Enforcement - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road -

Glen Ellyn, IL 60137 ,

Subject:

Byron Station Units 1 and 2 Post-Tensioning Anchorhead Failure NRC Docket Nos. 50-454 and 50-455 Reference (a): December 26, 1979 letter from W. F.

Naughton to J. G. Keppler Oear Mr. Keppler:

Commonwealth Edison Company notified your office on November 29,'1979 of the failure of two (2) field anchorheads for the horizontal tendons used to post-tension the concrete (primary) containment on Byron Units 1 and 2. That notification was made under 10 CFR 50.55(e). Reference (a) contained an interim report concerning these failures. As indicated in the attached second interim report, additional failures have occurred necessitating further testing to resolve this deficiency. Final resolution is now scheduled for May 15, 1980. Therefore, Commonwealth Edison requests an extension to that time for submittal of the final report.

Please address any questions you may have to this office.

. Very truly yours, k

W. F. Nau ton Nuclear Licensing Administrator Pressurized Water Reactors Attachment cc: Director of Inspection v khD9 Enforcement g l 2112 3 8003130 401 'l