ML20054J605

Interim Deficiency Rept Per Item M-50 Re Welds W/Inadequate Surface Preparation for Radiographic Test.Request for Mgt Corrective Action Issued.Resolution Expected to Be Available by 820720

ML20054J605
Person / Time
Site:	Zimmer
Issue date:	06/14/1982
From:	Borgmann E CINCINNATI GAS & ELECTRIC CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 10CFR-50.55E, QA-1816, NUDOCS 8206290330
Download: ML20054J605 (2)

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m THE CINCINNATI GAS & ELECTRIC COMPANY CINCINNAT1, OHIO 4520t June 14, 1982 QA-1816 E". A. BORG M AN N SENSOR vlCE PfDESfDENT U. S. Nuclear Regulatory Comnission Pcgion III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Attention: Mr. J. G. Keppler Regional Administrator RE: NM. H. ZIIHER NUCLEAR POWER STATION UNIT I 10GR50.55 (e) .- ITEM M WEIDS WI'HI IN-ADEQUATE SURFACE PREPARATICN FOR RP - DOCKET NO. 50-358, CONSTRUCTION PERMIT NO. CPPR-88 W.O. #57300, JOB E-5590, FILE NO. NRC-8, M-50 Gentlenen:

'Ihis letter constitutes an interim report concerning the subject condition initially reported to the Ocmnission as a potentially report-able deficiency under 10TR50.55(e) .

This iten was originally identified in CG&E's investigation of find-ings cited in I.E. Inspection Report 81-27. 'Ihis investigation revealed that weld surface irregularities detected in radiographic review of welds in the "as-welded" condition may mask rejectable indications. The initial review of a randan sample totaling 363 radioaraphs noted that approximately two-thirds were shot in the "as-welded" condition. Of that two-thirds, surface irregularities in seventy-three (73) welds were identified that may mask rejectable indications. 'Ihese welds are in the process of being radiographed and re-evaluated. To date, only one weld, which was identi-fied in the referenced NBC inspection report, has shown a rejectable condition, a one and one-half inch slag inclusion, which was masked fran radiographic examination. It appears that inadequate surface preparation of joints welded utilizing a stringer bead technique may be a contributing factor in masking defects.

CG&E has issued a Management Corrective Action Request to addmss this concern. A resolution is expected to be available by July 20, 1982, at which time a follow-up report will be subnitted.

8206290330 820614 jyN 2 31982 PDR ADOCK 05000350 PDR g

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Mr. J. G. Keppler Pcgional Mministrator l June 14, 1982 - QA-1816 Page 2 l

l We trust the above will be found acceptable as an interim report under 10CFR50.55(e) .

Very truly yours, x

'I1IE CINCINNATI GAS & ELECITtIC (D4PANY E. A. BOPCMME SENIOR VICE PRESIDENT FKP:ec cc: NBC Office of Inspection & Enforcment Washington, D. C. 20555 NfC Senior Pcsident Inspector Attn: W. F. Christianson

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