ML20010H661

Significant Deficiency Rept 413/81-20 Re Welding Arc Strike on Bonnet of safety-relief Valve 1KC836 in Component Cooling Water Sys,Initially Reported on 810821.Valve to Be Repaired & Const Training Procedures Revised

ML20010H661
Person / Time
Site:	Catawba
Issue date:	09/21/1981
From:	Parker W DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
10CFR-050.55E, 10CFR-50.55E, NUDOCS 8109290040
Download: ML20010H661 (2)

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o DUKE POWEH COMPANY .g,e Powen 13tfitnixo 4:32 Sourri Ciruncu STarzT, CnAHWTTE, N. C. 28242 wituAu o. Panaca,sa. 'l O ,* 3 '

%ct PersecrmY TcLtewoN E:AntA 704 Strau PnCOwCTiOM 373-4083 September 21, 1981 Kl$ / /,

Mr. James P. O'Reilly, Director 9-Q

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• M U. S. Nuclear Regulatory Commission Q 8 '

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Region II 101 Marietta Street, Suite 3100

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887 S4 q,# A 3 Atlanta, Georgia 30303 %4/ .?'

Re: Catawba Nuclear Station s/ 4.J i l s ,. ' s Unit 1 i Docket No. 50-413

Dear Mr. O'Reilly:

Pursuant to 10 CFR 50.55e, please find attached Significant Deficiency Report SD-413/81-20.

Ve y truly yours,

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William O. Parker, Jr.

a s RWO/php Attachment cc: Director Resident Insp etor

! Office of Inspection and Enforcement Nuclear Regulatory Commission U. S. Nuclear Regulatory Commission Catawba Nuclear Station Washington, D. C. 20555 lbs i / r E8109290040 8109:1 DR ADOCK 05000

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~ . r CATAWBA NUCLEAR STATION - UNIT 1 REPORT NUMBER: SD-413/81-20 REPORT DATE: September 21, 1981 ,

IDENTIFICATION OF DEFICIENCY: Welding arc strike on the bonnet of safety-relief valve 1KC836 in the Component Cooling Water System.

INITIAL REPORT: On August 21, 1981, Mr. J. Bryant of NRC Region II, Atlanta, GA, was notified of this deficiency by Mr. W. O. Henry of Duke Power Company, Charlotte, NC.

SUPPLIER AND/0R COMPONENT: The subject valve of this report is a 3/4" safety-relief valve (manufacturer's serial number TE-32930) manufactured by Dresser Industries, Alexandria, LA.

DESCRIPTION OF DEFICIENCY: A welding arc strike was detected on the bonnet of safety-relief valve 1KC836 during a pipe surface inspection. The blending of the arc strike into the valve bonnet resulted in a violation of minimum wail thickness requirements.

ANALYSIS OF SAFETY IMPLICATIONS: Had this deficiency gone undetected, the relief valve could have failed to open thus negating a portion of the system overpressure protection.

CORRECTIVE ACTION: Valve 1XC836 will b? repaired in accordance with Duke Power Company procedures (re: Nonconforming Item Report 12466).

In order to minimize the recurrence of similar deficiencies, Construction

. Training Procedures will be revised to inform crafts personnel, especially welders, of the consequences of arc strikes on system pressure boundary com-

ponents.

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