ML20009D861

Responds to NRC Ltr Re Violations Noted in IE Insp Repts 50-413/80-17 & 50-414/80-17.Corrective Actions:Welding Inspectors Retrained Per Welding Program Process Spec L-200 & All Repairs Made

ML20009D861
Person / Time
Site:	Catawba
Issue date:	06/01/1981
From:	Parker W DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009D856	List: ML20009D861
References
NUDOCS 8107240429
Download: ML20009D861 (2)

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Dunn Powitn;:GOMPAILY;:g v x.

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June 1, 1981 Vice Pets crNT TELEPwCNE AREA 704 ST E Ana PRODUCT ON 373-4083 Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 Re: RII: El!G 50-413/80-17 50-414/80-17

Dear Mr. O'Reilly:

Plerae find attached final response to Infraction No. 413-4ii/80-17-01 which was identified in the above referenced Inspection Report.

I declare under penalty of perjury that the statements set forth herein are true and correct to the best of my knowledge.

Very truly yours,

}fj]/fkh] 0 /bdY0h ll William O. Parker, Jr.

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RWO/djs Attachment cc: NRC - Catawba Resident Inspector 8107240429 810716 PDR ADOCK 05000413 O PDR

'l RESPONSE June 1, 1981

1. During inspection conducted July 21 - 25, 1980, five welds on socket welded flanges were identified as being u Hersized. These welds were identified to DPC personnel,and i t was confi rmed that they were undersized due to slight concavity and local irregularities.

2. The socket welded flanges had been previously accepted by QC welding inspectors. it is significant to note that Duke Power Company chooses to fabricate all socket welded flanges per L-200 which meets the ASME Code and is more stringent tbsn ANSI B31.1. ANSI requires a fillet weld leg length of 1.09t as oppowd to the 1.4t required by ASME. The size weld is a function of pipe wall thickness and of ten results in odd sizes (i.e., 0.186",0.305"). This makes measurement difficult considering the geometry involved and resulted in estimations of weld leg size being made by the inspectors.

3 A) All welding inspectors have been retrained in accordance with Welding Program Process Specification L-200 " Gas Tungsten Arc Welding" and Quality Assurance Porcedure L-80 " Visual Workmanship standards for Welds".

Construction Procedure #427 " Hold Faints and Process Control Require-ments for ASME Class A, B, and C Welds" was issued on July 25, 1980, which provides additional information to the welding inspector to aid in determining weld leg length for socket welded flanges.

B) A program was developed whereby all socket welded flanges for ASME (Duke Class A, B, and C) and ANSI B31.1 -(Duke Class E and F) welded prior to August 27, 1980, were identified. Upon review of the program printout, which listed socket welded flanges by weld nember, Duke Class, size and schedule, the decision was made to reinspect ail welds listed wi th repairs to be made as necessary.

Results of reinspection found that 301 (approx. 17% of the total welds reinspected) welds were undersized. Repair process control forms were issued for til welds found to be undersized.

4. To prevent further violations, welding inspectors have been retrained in the requirements of L-200 and L-80. Construction Procedure #427 was developed and implemented.

5 Reinspection is complete and all repairs have been made. Full compliance was achieved by June 1, 1981.

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