ML19254F591
| ML19254F591 | |
| Person / Time | |
|---|---|
| Site: | Shoreham File:Long Island Lighting Company icon.png |
| Issue date: | 09/14/1979 |
| From: | Novarro J LONG ISLAND LIGHTING CO. |
| To: | |
| Shared Package | |
| ML19254F590 | List: |
| References | |
| SNRC-430, NUDOCS 7911120130 | |
| Download: ML19254F591 (2) | |
Text
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LONG ISl_.AND LIGHTING COM PANY FACO
'gagafff,gz, SHOREHAM NUCLEAR POWER STATION P.O. BOX 618. NORTH COUNTRY RO AD
- V/ADING RIVER. N.Y.11792 September 14, 1979 SNRC-430 Mr. Boyce Grier, Director Office of Inspection & Enforcement Region i U.S.
Nuclear Regulatory Commission 631 Park Avenue iMng of Prussia, PA 19405 LONG ISLAND LIGHTING COMPANY SHOREHAM NUCLEAR POWER STATION - UNIT 1 DOCKET NO. 50-322
Dear Mr. Grier:
On May 26, 1979, in accordance with 10CFR50. 55 (e) we reported verbally to Region 1 a deficiency in the w-1. ding of integral attachments to Class 1 piping systems.
On June 29, 1979, SNRC-401 was issued as our 30-day written report.
This letter serves as our final written report on 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 weld at its root.
The deficiency was found by ultrasonic ex-amination (UT) of three integral attachments (lugs) welded in 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 penatration at the root.
We have completed a UT examination of all 142 Class 1 lugs (both field welded and shop welded), all of which indicate some lack of penetration.
Additionally, during the course of our investigation it was found that the material used for 100 of the 142 lugs did not have certain test records required for Class 1 material.
1309 349 7911120 06/30 FC-8935
. September 14, 1979 Mr. Boyce Grier Page 2 CORRECTIVE ACTION The 100 lugs which were missing material test records were re-moved using approved procedures.
New lugs with proper material certifications were installed, UT examined, and accepte2 in accordance with site procedures and the code.
The remaining 42 lugs will be repaired and UT examined in ac-cordance with site procedures and the code.
To date, 35 of the repairs and examinations have been completed and accepted.
The remaining 7 lugs are currently being repaired.
CORRECTION 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, the corrective action taken to assure code compliance will also prevent recurrence.
DATE OF FULL COMPLIANCE Rework will be completed by November 1979.
Very truly yours, J.
P.
No arro Project Manager Shoreham Nuclear Power Station CKS:jm cc:
Mr. John G.
Davis, Director Office of Inspection & Enforcement U.S.
Nuclear Regulatory Commission Washington, D.C.
20555 1309 350
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