ML19294B970

Interim Potential Deficiency Rept Re Embed Plate Load Capacity Tables.Some Pipe Support Designs Exceeded Allowable Embed Loads Due to Lateral Loads.No Supports Installed.Final Rept Will Be Submitted by 800516

ML19294B970
Person / Time
Site:	Vogtle
Issue date:	03/06/1980
From:	Dutton D GEORGIA POWER CO.
To:
References
GM-577, NUDOCS 8003060472
Download: ML19294B970 (2)

Text

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s Georgia Power Company Post Office Box 4545 Atlanta, Georgia 303o2 M

Telephone 404 522-Mm Vogtle Project Southern Company Servces, Inc Post Office Box 2625 Birmingham, Alabama 35202 Telephone 2o5 87(Mon United States Nuclear Regulatory Commission File: X78G03M5 Office of Inspection and Enforcement Log: GM-577 Region II - Suite 3100~

101 Marietta Street, fl.W.

Atlanta, Cecrgia 30303 Attn: Mr. James P. O'Reilly

Reference:

RII: JP0; 50-424; 50-425; Potential 10CFR50.55(e)

(Embed Plate Load Capacity Tables)

Gentlemen:

On January 28, 1980 it was reported to your office that a potential item under 10CFR50.55(e) existed at Plant Vogtle concerning embed plate load capacity tables.

The nature of the potential deficiency is as follows:

The load capacity tables for embed plates were determined on the basis of full engagement area and no lateral loads (on the weak axis of the embed). Application of these tables in the design of supports, in some cases, has been based on partial engagement and has allowed lateral loads in some instances. It is possible that some pipe support designs released for construction have exceeded the allow-able embed loads based on partial engagement and due to the presence of the lateral loads. This affects approximately 5760 supports.

At the present time no pipe supports have been installed. Georgia Power Company's Construction and Quality Assurance Departments have been instructed to suspend any installation activity relative to pipe supports until design adequacy and modifications, if any, have been resolved.

SOff ss ll0 8 0 0 3 0 00 + 7a

United States Nuclear Regulatory Commission Attn: Mr. James P. O'Reilly A detailed review, analysis and identification of the necessary modification of the pipe supports is currently under way. This review is expected to be complete and a final report issued by May 16, 1980.

This response contains no proprietary information and may be placed in the NRC Public Document Rooms upon receipt.

Very tr ours, W76 Doug Du ton ,

Project General Manager DED:tp xc:/. S. Nuclear Regulatory Commission Attn: Victor Stello, Jr. Acting Director Office of Inspection and Enforcement Washington, DC 20555 M. D. Hunt, NRC Region II J. H. Miller, Jr.

F. G. Mitchell, Jr.

R. J. Kelly C. F. Whitmer i R. E. Conway D. E. Dutton R. H. Pinson J. T. Beckham, Jr.

R. W. Staffa K. M. Gillespie L. T. Gucwa C. R. Miles, Jr.

E. D. Groover D. L. McCrary R. A. Thomas

0. Batum J. A. Bailey M. Z. Jeric B. L. Lex

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