ML20050A972
| ML20050A972 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 03/23/1982 |
| 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, NUDOCS 8204020462 | |
| Download: ML20050A972 (2) | |
Text
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p o-TENNESSEE VALLEY AUTHORITY 1'
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U.S. Nuclear Regulatory Commission
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nPRj gg02A Attn:
Mr. James P. O'Reilly, Regional Administrator C
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101 Marietta Street, Suite 3100 6
Atlanta, Georgia 30303 1
Dear Mr. O'Reilly:
4 BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - SEISMIC SUPPORT LUGS ON 2-INCH OR LESS STAINLESS STEEL PIPE BLRD-50-438/82-05, BLRD-50-439/82 SECOND INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector 4
R. V. Crlenja!: on December 24, 1981 in accordance with 10 CFR 50.55(e) as NCR 1690. This was followed by our first interim report dated January 21, 1982. Enclosed is our second interim report. We expect to submit our next report by May 19, 1982.
If you have any questions concerning this matter, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, Ma ager Nuclear Regulation and Safety l
Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 OFFICMLGML
-/bd 8204020462 820323
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PDR ADOCK 05000438
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S PDR An Equal Opportunity Employer j
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ENCLOSURE 4
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 SEISMIC SUPPORT LUGS ON 2-INCH OR LESS STAINLESS STEEL PIPE BLRD-50-438/82-05, BLRD-50-439/82-05 10 CFR 50.55(e)
SECOND INTERIM REPORT Description of Deficiency Because of the relatively large amount of weld required for lug attachment, it is suspected that stainless steel pipe (2-inch diameter and less) in the areas where lugs are attached may not meet ASME Code parts NB, NC, and ND-4200 ovality tolerances and may exhibit burn-through or oxidation.
I Interim Progress Eight 5-inch long weld mockups using seismic lugs 1/4" by 1/2" by 2" long and type 304 stainless steel schedule 40 pipe are being forwarded to Singleton Materials Laboratory for metallurgical evaluation. These consist of duplicate sets of four, which include 2, 1-1/2, 1 and 1/2" nominal diameter pipe. One of the sets has been cut longitudinally for our examination of inside surfaces.
These sections were cut from mockups originally 15" long to provide a pipe length constraint, as opposed to previous mockups welded in 5" lengths. The ends of the mockups were covered by 1/8" thick plate sections before welding (by tack welding) to prevent visual inside access during welding.
In addition to the above mockups, four standard butt welds of identical pipe material o.' the above diameters are also being forwarded to Singleton Materials Laboratory for evaluation.
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