ML20078A603

Interim Deficiency Rept Re Itt Grinnell Radiographs for Welds of T-quenchers & Pipes W/Wall Thickness Equal to or Greater than 1/2 Inch.Initially Reported on 830119 & 0523. Final Rept Will Be Provided by 831215

ML20078A603
Person / Time
Site:	Nine Mile Point
Issue date:	09/02/1983
From:	Mangan C, Mangan C NIAGARA MOHAWK POWER CORP.
To:	Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
10CFR-050.55E, 10CFR-50.55E, 7340, NUDOCS 8309230341
Download: ML20078A603 (2)

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, M Y NIAGARA R UMOHAWK NIAGARA MOHAWK POWER CORPORATION /300 ERIE BOULEVARD WEST. SYRACUSE, N.Y.13202/ TELEPHONE (315) 474-1511 Septaber 2, 1983 (7340)

Mr. R. W. Starostecki, Director U.S. Nuclear Regulatory Comission Region I Division of Project and Resident Programs 631 Park Avenue King of Prussia, PA 19406 Re: Nine Mile Point Unit 2 Docket No. 50-410

Dear Mr. Starostecki:

Enclosed is a interim report in accordance with 10CFR50.55(e) for the problem concerning ITT Grinnell radiographs for welds of T-quenchers and pipes with wall thickness equal to or greater than 1/2 inch. Mr. H. Kister of your staff was informed via telecon of the condition concerning T-quencher welds on January 19, 1983 and the condition concerning other pipe welds on May 23, 1983. An extension on submittal of the final report to December 15, 1983 was granted by Ms. J. Grant (Nuclear Regulatory Cc mission, Region I) on September 2, 1983.

I Very truly yours, i

hhlO C. V. Mang' l

Vice President Nuclear Engineering & Licensing CVM/TRL:djm Enclosure l xc: Director of Inspection and Enforcement U.S. Nuclear Regulatory Comission Washington, D.C. 20555 Mr. R. Gram, Resident Inspector l

8309230341 830902 l PDR ADOCK 05000410 PDR l S f 4V

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NIAGARA M0 HAWK POWER CORPORATION NINE MILE POINT UNIT 2 DOCKET N0. 50-410 Interim Report for a Problem Concerning the ITT Grinnell Weld Radiographs of T-Quenchers and Piping Equal to or Greater than 1/2 Inch DESCRIPTION OF THE PROBLEM A review of ITT Grinnell Corporation shop weld radiographs of T-quencher, Mark No. 2SVV*DIFF127, indicated that there was an attempt to artificially enhance a radiograph for weld F. This weld is ASME Code Class 3. This item has been identified in Stone & Webster Engineering Corporation Nonconformancr. and Disposition Report No. 4262.

As a result of this finding, additional weld radiographs of other T-quenchers and piping with wall thickness equal to or greater than 1/2 inch were reviewed both at the job site and at ITT Grinnell's shop at Kernersville, North Carolina. As a result, a total of 53 weld radiographs (including radiograph for weld F identified above) were found to have enhancements. Out of the 53 welds found to have enhancements, 36 were reradiographed and found to be acceptable. The remaining 17 welds are still under investigation. A final report will be submitted by December 15, 1983.

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