ML20091M607
| ML20091M607 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 06/04/1984 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NCR-1894, NUDOCS 8406110360 | |
| Download: ML20091M607 (2) | |
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TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 374ol 400 Chestnut Street Tower II M JUN,
Pl2 : 22 5
June 4,1984 BLRD-50-438/82-66 BLRD-50-439/82-59 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 WELDS ON CABLE TRAY SUPPORTS - BLRD-50-438/82-66, BLRD-50-439/82 THIRD INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. V. Crlenjak on September 8,1982 in accordance with 10 CFR 50.55(e) as NCR 1894. This was followed by our interim report dated October 8,1982 and our final report dated January 21, 1983 Related NCR 3013 was later documented and has resulted in the reopening of this condition. Our next report will be submitted by November 30, 1984.
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 D S Wm L. M. Mills, Manager Nuclear Licensing Enclosure cc:
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 8406110360 840604 PDR ADOCK 05000438 g
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1983-TVA SOTH ANNIVERGARY An Equal Opportunity Employer l
ENCLOSURE 6
w BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 DEFICIENT WELDS ON Cf.BLE TRAY SUPPCRIS NCRs 1894 AND 3013 BLRD-50-438/82-66, BLRD-50-439/82-59 10 CFR 50.55(e) 1 THIRD INTERIM REPORT 1
Description of Deficiency Nonconformance report (NCR) 1894 documented a condition whereby groove welds The specified on TVA drawings (4DWO760-X2 series) were made as fillet welds.
subject welds are cable tray support welds on trays in the Diesel Oenerator Building. The failure of craft personnel to pay close attention to the drawing details is the root cause.
As part of the corrective action on NCR 1894, an inspection of 410 potentially deficient welds was performed to determine the extent of the deficiency.. Seventy-four of the welds were identified as inaccessible during The inaccessible welds were inadvertently omitted from the 1
the inspection.
list of unacceptable or indeterminate welds which required a design disposition. This condition was cited in violation 50-438/84-05-01 and has been identified by TVA as NCR 3013 Interim Progress Bellefonte The cable tray supports are being reworked as necessary.
Construction has identified to the Division of Engineering Design (EN DES) the sizes of the fillet welds used on the supports. EN DES has evaluated the 3
weld sizes for adequacy and has determined which welds require rework (except for the 74 inaccessible welds described above). Drawings 4DWO760-X2-4 R7, 4DWO760-X2-6 R11, 4DWO760-X2-8 R6 have been revised by TVA, and these drawings now include a new or alternate weld symbol to indicate the supports needing rework. The rework will utilize fillet welds and the fillet weld
. size shown on the drawings is the minimum acceptable size. Where existing TVA fillet welds exceed the specified dimension, they may be used as is.
i Process Specification 0.C.1.1 has been revised to include a surveillance program which is to check welding activities in process and includes a preweld inspection made by the welder and his foreman of the weld-joint dimensions. All 74 inaccessible welds are currently being evaluated by EN DES to determine the extent of rework required.
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