ML19319C210

Interim Deficiency Rept Re Main Stream Line Welding.During post-weld radiography,crack-like Indication Found in Weld. Weld & Affected Area Removed & Short Spool Piece Inserted. Final Rept Pending

ML19319C210
Person / Time
Site:	Davis Besse
Issue date:	08/11/1976
From:	Roe L TOLEDO EDISON CO.
To:
References
NUDOCS 8002060695
Download: ML19319C210 (1)

Text

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TOLEDO EDISGrJ LOWELL E. RCE Vice President Facikt es Devascoment

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August 11, 1976 Docket No. 50-346 Mr. James G. Keppler Regional Director, Region III Dxrectorate of Regulatory Operate.ons U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

Dear Mr. Keppler:

This letter is submitted as an Interim Report regarding the welding of the main stream line at the Davis-Besse Nuclear Power Station, Unit #1.

This was discussed by Mr. E. C. Novak, General Superintendent, Power Engineering and Construction, with Mr. D. W. Hayes, NRC Region III Office of Inspection and Enforcement, on July 12, 1976. This condition is viewed as a significant deficiency pursuant to 10 CFR 50.55(e).

During postweld radiography, a crack-like indication was found in the weld between the 26 inch to 24 inch reducer and the 26 inch portion of the main stream line off the IB steam generator. Following numerous attempts, B&W Construction Company was unable to clear the crack-like indication. To correct this condition, the weld and the affected area were removed and a short spool piece inserted.

A definitive report of the deficiency, analysis of the safety implications and the corrective action taken will be submitted to your office in accordance with 10 CFR 50.55(e) upon completion of our study of this problem.

Yours very truly, cp c/17 cc:

Dr. Ernst Volgenau, Director Office of Inspection and Enforcement ,

U. f. Nuclear Regulatory Commission Washington, D. C. 20555 THE TCLI:DO EDISCN CCMPANY ECISON PLAZA 300 MADiON AVENUE TCLEDO CHIO 43652 "a ic to7c 8 0 0 2 0 60 474~~ #