ML20003B810
| ML20003B810 | |
| Person / Time | |
|---|---|
| Site: | Phipps Bend  |
| Issue date: | 12/22/1980 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NCR-PBNP-135, NUDOCS 8102250605 | |
| Download: ML20003B810 (2) | |
Text
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ENNESSEE VALLEY AUTHCR!TY r,.,..
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CH ATTANCCG A. TENNES3EE 374ct 400 Chestnut Street Tower II 3ii.= ],* g y December 22, 1980 Mr. James P. O'Reilly, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Region II - Suite 3100 101 Marietta Street Atlanta, Georgia 30303
Dear Mr. O'Reilly:
PHIPPS BEND NUCLEAR PLANT UNITS 1 AND 2 - REPORTABLE DEFICIENCY -
DEFICIENT WELDS ON WEIR WALL LINER PLATES (NCR PBNP 135 - FINAL)
Initial notification of the subject deficiency was made to NRC-0IE, Region II, Inspector R. W. Wright on August 20, 1980.
The first and second interim reports were submitted on September 19 and November 24, 1980, respectively.
In compliance with paragaph 50.55(e) of 10 CFR Part 50, enclosed is the final report of the subject deficiency.
If you have any questions, please call Jim Domer at FTS S57-2014 Ve.7 truly yours, TENNESSEE VALLEY AUTHORITY
. M. Mills, M nager Nuclear Reculation and Safety Enclosure cc:
Mr. Victor Stello, Director (Enclosure) gw Office of Inspection and Enforcement
'e U.S. Nuclear Regulatory Commission Washington, DC 20555 5
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S OFFICIAL COPY 8102250605 An couai accortunity emoiover
> a ENCLOSURE PHIPPS EEND NUCLEAR PLANT U' LITS 1 AND 2 DEFIC'ENT WELOS ON WEIR WALL LINER PLATE 70CFR50.55(e)
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NCR PBNP-135 REPORT NO. 3 (FINAL)
On August 20, 1980, TVA informed NRC-0IE Region II Inspector, R. W.
Wright, of a potentially reportable condition under 10CFR50.55(e) regarding deficient welds en the weir wall liner plates. This structure was fabricated by Stellar Manufacturing Company, Collingswced, New Jersey. This is the final report on this condition.
Descriction of Deficiency The weir wall liner plates designated for Phipps Bend Nuclear Plant have been shipped to the site. All 44 plates exhibit examples of rejectable welding per the inspection criteria established in Section III of the ASME Code. Additionally, some carben steel angles were welded to the stainless steel liner plates using carbon steel welding
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electrodes. This is centrary to ASME III Code require =ents and C. F.
Braun Specificatien 300-11.
Safety I:clications i
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The use of the inecerect electrode en scme welds results in a weld of indeterminate properties which may be susceptible to cracking or inadequate adhesien to the stainless steel. Also, many welds =ade with the proper electrede were of poor quality and required repair.
The =any occurrences of unacceptable welds could have degraded the structural integrity of the weir wall which could have adversely affected plant safety.
Ccerective Action l
Allswelds made with the incorrect electrode have been removed and the welds were =ade with the proper weld electrode. All welds which were of unacceptable quality and which were =ade with the proper electrode have been reworked to remove'the deficiencies. All welds were 7
inspected to all applicable criteria.
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