ML19249A167
| ML19249A167 | |
| Person / Time | |
|---|---|
| Site: | Shoreham File:Long Island Lighting Company icon.png |
| Issue date: | 07/13/1979 |
| From: | Robert Carlson NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Wofford A LONG ISLAND LIGHTING CO. |
| References | |
| NUDOCS 7908210108 | |
| Download: ML19249A167 (1) | |
Text
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,o KING oF PRUSSIA, PENNSYLVANIA 19406 Docket No. 50-322 30L i 3 E13 Long Island Lighting Company ATTN: Mr. Andrew W. Wofford Vice President 175 East Old Country Road Hicksville, NY 11801 Gentlemen:
Subject:
Welding of Integral Attachments to Class 1 Piping Systems (Your letter of June 29, 1979) Thank you for your letter, referenced above, which forwarded an interim report pursuant to 10 CFR 50.55(e) regarding the subject matter. Your report will be revieued and evaluated, and should we require additional information concerning this matter, we will contact you. Your cooperation with us is appreciated. Sincerely, f f W Robert T. Carlson, Chief Reactor Construction and Engineering Support Branch CC: J. P. Novarro, Project Manager Edward M. Barrett, Esq. Edward J. Walsh, Esq. T. F. Gerecke, Manager, Engineering QA Department 841 159 goosewlo8
LONG ISLAND LIGHTING COMPANY SHOREHAM NUCLEAR POWER STATION h-- - - P.O. BOX 618. NORTH COUNTRY ROAO e WADING RIVER, N.Y.11792 June 29, 1979 SNRC-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 ISLAND LIGHTING COMPANY SHOREHAM NUCLEAR POWER STATION - UNIT 1 DOCKET No. 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 lack of penetration of the This deficiency was found by(ultrasonic weld at its root. (UT) of three integral attachments lugs) welded in examination the field and two shop welded lugs supplied 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 applicable ASME code to which these lugs were welded as well as the Stone & Webster (S&W) 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. 7907Rova3 84I w
s. ~- Mr. Boyce Grier SNRC-401 June 29, 1979 Page 2 CORRECTIVE ACTION Presently several courses of action are available to correct these deficiencies: 1. Repair the lugs 2. Remove and replace the lugs 3. Upgrade lug material used to Class 1 requirements 4. Utilize the summer '79 addendum of the ASME III code which will allow either full penetration welds or fillet welds (if this option is used, new stress analysis must be performed and increased weld size may be required) 5. A combination of the above CORRECTIVE ACTION TO PREVENT RECURRENCE All new lugs installed will be UT examined and material 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 COMPLIANCE The date of full compliance as well as the actual corrective actions taken will be addressed in our final written report which will be submitted in 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 NRC 'on June 28, 1979, at which time he agreed to the delay. Very ruly yours, f WM J. P. dov rro i Project M nager Shoreham Nuclear Power Station JJM:jm cc: Mr. John G. Davis, Director Office of Inspection & Enforcement U.S. Nuclear Regulatory-Commission Washington, D.C. 20555 841 161}}