ML20042A392
| ML20042A392 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 03/09/1982 |
| 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 8203230385 | |
| Download: ML20042A392 (3) | |
Text
F TENNESSEE VALLEY AUTHORITY
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CH ATTANOOG A, TENNESSCE 37401 0
400 Chestnut Street Tower II
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March 9, 1982
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BLRD-50-438/81-72 BLRD-50-439/81-70 RECetWe 3
2 MAR 2 21986 1 f n u Ja %:sv g @ M7 U.S. Nuclear Regulatory Commission tu Region II D
Attn:
Mr. James P. O'Reilly, Regional Administrator
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101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 N
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 A11D 2 - WELDS BY JOHNSON MACHINE WORKS ON REVOLVING PLATFORM - BLRD-50-438/81-72, BLRD-50-439/81 FINAL REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. V. Crlenjak on November 6, 1981 in accordance with 10 CFR 50.55(e) as NCR 1638. This was followed by our interim reports dated December 4,1981 and January 22, 1982..
Enclosed is our final report. We consider 10 CFR Part 21 applicable to this deficiency.
If you have any questions concerning this matter, please get in touch with R. H. Shell at FTS 8E8-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY
?G Jt Cur
. M. Mi Is, Manager c
Nuclear R gulation and Safety Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforecment U.S. Nuclear Regulatory Commission Washington, DC 20555 EA p
HOCK 050000385 820309 D
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 WELDS BY JOHNSON MACHINE WORKS ON REVOLVING PLATFORM BLRD-50-438/81-72, BLRD-50-439/81-70 10 CFR 50.55(e)
FINAL REPORT Description of Deficiency Welds on the revolving platform trucks, manufactured by Johnson Machine Works, Chariton, Iowa, do not comply with the American Welding Society specification D1.1, as required by the procurement contract. The subject welds exhibit overlap, undercut, spatter, and insufficient reinforcement.
The following list identifies the welds which were found not to comply with AWS D1.1 requirements on the unit 2 revolving platform truck.
REFERENCE JOHNSON MACHINE WORKS DRAWING 55904, SHEET 7 Weld Components Weld Defects 1.
Pl. "PA" to Channel "MA" Insufficient Reinforcement ('s1/16")
2.
Pl. "PC" to Cnannel "MA" Overlap, Insufficient Reinforcement
(~1/16"), Undercut (+1/32"- 3/32")
3 P1. "PJ" to Channel "MA" Insufficient Reinforcement @w1/16")
Undercut (%1/32" - 1/8")
4.
P1. "PM" to Pl. "PP" Insufficient Reinforcement (varies fromew1/32"- 1/16")
5.
F1. "PP" to Pl. "PA" Undercut ('t1/32"- 3/32")
6.
Pl. "PP" to Channel "MA" Overlap, LOF (? Weld Ties, Undercut (ev1/32"- 3/32"), Spatter, Insufficient Reinforcement (/w1/16")
7.
P1. "PP" to Pl. "PQ" Overlap, Spatter, Undercut (su1/32-3/32")
8.
P1. "PT" to P1. "PA" Undercut (e61/32"- 3/32"), Welded continuous on two sides instead of intermittent as required by, the drawing.
TVA has determined that the extent of the weld deficiencies on the unit 1 truck is the same as the deficiencies noted on the unit 2 truck.
Safety Implications The revolving platforms, which are located in each of the primary containment domes, provide access to the Reactor Building Spray System.
Failure of the listed welds could lead to collapse of the entire structure and damage to the safety-related equipment below which could adversely affect safety of plant operation.
a Page 2 Corrective Action An analysis of items 1, 2, and 4 through 8 indicates that the welds are adequate as they currently exist.
Item No. 3 will be repaired in accordance with AWS DI.1, Section 3.7.
All new welding will be either magnetic particle or dye-penetrant tested. This disposition has been determined to be appropriate for the deficiencies noted on both unit 1 and unit 2 trucks.
The corrective action prescribed has been completed dn the unit 2 truck, and the only action left to complete on the unit I truck is the nondestructive examination inspection of the weld repairs. TVA expecte corrective actions to be complete by March 31, 1982.
To prevent future welding deficiencies, TVA has initiated a training program for Quality Engineering Branch (QEB) employees per QEB-AI 313.1
" Training and Certification of QEB Personnel" to certify QEB source inspectors with the American Welding Society (AWS).
In addition, source inspectors will be allotted more time for inspection which should allow a more comorehensive inspection and detection of similar deficiencies.
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