ML19312D459

Deficiency Rept Re Pipe Support Designs Released for Const for 5760 Supports Exceeding Allowable Embed Loads.No Pipe Supports Presently Installed.Installation Suspended Until Design Adequacy & Mods Resolved

ML19312D459
Person / Time
Site:	Vogtle
Issue date:	03/03/1980
From:	Dutton D GEORGIA POWER CO.
To:
References
GM-577, NUDOCS 8003240439
Download: ML19312D459 (2)

Text

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' Georga Power Company Post OfSce Box 4545 L Atlanta, Georgia 3o3o2 T *on e 404 522-eow ,pr ., ,

Vogtle Project Southem Company Services, Inc Post Office Box 2625

! Sirmengharn, Alabama 352o2 Telephone 2o5 8706o11 United States Nuclear Regulatory Commission .

File: X78G03M5 Office of Inspection and Enforcement Log: GM-577 Region II - Suite 3100

- 101 Marietta Street, N.W.

Atlanta, Georgia 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, 1080 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 i

in some instances. It is possible that some pipe support i

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.

l 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.

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~ 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 ?xpected 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, qW@A Doug Dutton Project General Manager DED:tp xc: U. 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 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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