ML20079J530
| ML20079J530 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 01/13/1984 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| CON-NRC-2221, REF-PT21-84-274-000 NCR-2221, PT21-84-274, PT21-84-274-000, NUDOCS 8401240342 | |
| Download: ML20079J530 (2) | |
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TENNESSEE VALLEY AUTHORITY CH ATTANOOG A. TENN ESSEE 37401 400 Chestnut Street Tower II g g16 Ab
January 13, 1984 BLRD-50-438/83-20 BLRD-50-439/83-16 U.S. Nuclear Regulatory Commission Region II Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - DEFICIENT JOHNSON MACHINE WORKS WELDS ON AFW PUMP ROOM DOORS - BLRD-50-438/83-20, BLRD-50-439/83 FINAL REPORT The subject deficiency was initially reported to NRC-0IE Inspector Linda Watson on February 10, 1983 in accordance with 10 CFR 50.55(e) as NCR 2221. This was followed by our interim reports dated March 9 and July 12, 1983 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 858-2688.
Very teuly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, nager Nuclear Licensing Enclosure oc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Records Center (Enclosure)
Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 8001240342 840113 PDR ADOCK 05000438 i
S PDR
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1983-TVA SOTH ANNIVERSARY An Equal Opportunity Employer
ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 DEFICIENT JOHNSON HACHINE WORKS WELDS ON AFW PUMP ROOM DOORS NCR 2221 BLRD-50-438/83-20, BLRD-50-439/83-16 10 CFR 50.55(e)
FINAL REPORT Description of Deficiency The auxiliary feedwater ( AFW) pump room personnel access doors exhibit weld quality not in conformance with American Welding Society (AWS) D1.1 acceptance criteria. This is contrary to the requirements stipulated in TVA's Procurement Specification 3294, Section 23 The documented weld deficiencies include undersized, overlapped, and undercut welds, craters and slag. Undersize welds are present in a high proportion of the assemblies. The doors were fabricated by Johnson Machine Works, Chariton, Iowa.
Nonreportable nonconformance report (NCR) 1463 and reportable NCRs 1638 (BLRD-50-438/81-72, BLRD-50-439/81-70) and 1929 (BLRD-50-438/82-58, BLRD-50-439/82-52) were previously initiated bo document similar deficiencies with Johnson Machine Works supplied items. This NCR and NCR 1929 were issued as a result of significant conditions adverse to quality documented on the earlier NCRs and a subsequent investigation to determine if a generic condition adverse to quality with respect to Johnson Machine Works products exists.
The cause of TVA's failure to identify generic implications was addressed in TVA's response to Violation 50-438, 50-439/82-23-04.
Safety Implications The subject doors are pressure-retaining components whose intended purpose includes the protection of essential equipment in the event of an AFW line b re ak.
The cited deficiencies could degrade the ability of the subject doors to perform this secondary safety function. Therefore, primary safety-related components could be degraded, thus adversely affecting the safety of operations of the plant.
Corrective Action The auxiliary feedwater pump room personnel access doors were returned to Johnson Machine Works for rework. The subject doors were reanalyzed and reinspected after rework and found to be acceptable.
To prevent future welding deficiencies from going undetected (as per our final report on NCR 1638), TVA has initiated a training program for Quality Engineering Branch (QEB) employees per Administrative Instruction 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 comprehensive inspection and detection of similar deficiencies.