ML19224D566

Submits 30-day Deficiency Rept Re Welding of Integral Attachments to Class 1 Piping by Sys.Caused by Lack of Penetration of Weld at Root & Most Matl Used Not Being Class 1 Matl

ML19224D566
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	06/29/1979
From:	Novarro J LONG ISLAND LIGHTING CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
SNRC-401, NUDOCS 7907120623
Download: ML19224D566 (2)

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LONG ISLAND LIGHTING' COM PANY EBCD

. . , wary,s,,:,f SHOREHAM NUCLEAR POWER STATION P.O. BOX 618. NORTH COUNTRY ROAD e WADING RIVER. N.Y.11792 June 29, 1979 SURC-401 Mr. Boyce Grier, Director Office of Inspection & Enforcement Region 1 U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 LONG ISIJd4D LIGHTING CO:PANY SHORERiM GUCLEAR POUER STATION - UNIT 1 DOCKET J0. 50-322 Dear Mr. Grier-On May 29, 1979, in accordance with 10CFR50.55(e) we reported verbally to Region 1 a deficiency in the welding of integral attachments to Class 1 piping systems. This letter serves as our 30-day written report of this deficiency.

DESCRIPTION OF DEFICIENCY The deficiency associated with the welding of integral attach-ments to Class 1 piping systems is a lach of nenetration of the weld at its root. This deficiencv was found by ultrasonic examination (UT) of three integra'l attachments'(lugs) welded in the field and two shop welded lugs tpplied by General Electric (GE). The UT examinations performed were not required by the installation code (the code requires only a surface examination) or by any site procedures; but were performed to determine if a meaningful examination could be conducted on the lugs for in-service examination. The acclicable ASME code to which these lugs were welded as well asthe Stone & Uebster (S&U) and GE stress analyses require these welds to have full penetration at the root.

We have completed a UT examination of all 142 lugs (both field welded and shop welded), all of which indicate some lack of penetration. Additionally, during the course of our investiga-tion it was found that the material used for 100 of the 142 lugs did not have certain test records required for Class 1 material.

414 080 t go/9 $I O FC e935 7 90712 a 23

I Mr. Boyce Grier SJRC-401 June 29, 1979 Page 2 CORRECTIVE ACTIOU Presently several courses of action are available to correct these deficiencies:

1. Repair the lugs

2. Recove and replace the lugs

3. Upgrade lug material used to Class 1 requirements

4. Utilize the summer ' 79 addendum of the AS:E III code which will allow either full penetration welds or fillet welds (if this option is used, new stress analysis must be perforced and increased weld size may be required)

5. A combination of th2 above CORRECTIVE ACTION TO PREVEST RECURRE:CE All new lugs installed will be UT examined and caterial certi-fications reviewed to assure compliance with the code. Since all lugs are involved any corrective action taken to assure code compliance will also prevent recurrence.

DATE OF FULL CO:'PLIA.;CE

, The date of full cocpliance as well as the actual corrective actions taken will be addressed in our final written repc t which will be submitted ia 90 days.

This letter is being submitted two days late in order to include certain information not available earlier. This was discussed with Mr. A. Toth of the i.tC on June 28, 1979, at which time he agreed to the delay.

Very truly yours, bec: Dist. List 14 R. M. Kascsah

. . . . / J. A. Rigert

' 4 F "

1; C. A. Fonseca

" t ; C. L. Albertini J. P. dovarro D. U. Papa Proj ect Manager // 'f' Eng. File A21.200 Shoreham Uuclear Power Station SR2/ A21.200 JJM:jm cc- Mr. John G. Davis, Director Office of Inspection & Enforcecent U.S. nuclear Regulatory Cocaissica 4/g Washington, D.C. 20555 0, 9)