ML20086P959
| ML20086P959 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 02/17/1984 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8402270395 | |
| Download: ML20086P959 (2) | |
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go TENNESSEENALLEY AUTHORITY CH ATTANOOGA. TENNESSEE 374ot 400 Chestnut Street Tower II
,, n d7 A0 e ary 17, 1984 F
BLRD-50-438/84-10 BLRD-50-439/84 1U.S. Nuclear Regulatory Commission
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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 -0VERTORQUED CONDUIT AND CONDUIT BOX SUPPORT BOLTS - BLRD-50-438/84-10, BLRD-50-439/84-09
"'RST INTERIM REPOR_T The subject deficiency was initially mported to NRC-OIE I;
'or P. E. Fredrickson on January 24, 1984 in accordance with 10 c..
0.55(e) as NCR 2734. Enclosed is our first interim report. We expect to submit our
. next report by May 4,1984.
If you have any questions, please get in touch -with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, Mknager Nuclear Licensing Enclosum 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 8402270395 840217 PDR ADOCK 05000438 8
An Equal Opportunity Employer
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 OVERTORQUED CONDUIT AND CONDUIT BOX SUPPORT BOLTS BLRD-50-438/84-10, BLRD-50-439/84-09 NCR 2734 10 CFR 50.55(e)
FIRST INTERIM REPORT Description of Deficiency While performing an inspection of attachment bolts on electrical conduit, conduits boxes, and cable trays, an electrical quality control (EQC) unit inspector found that some of the bolts had been overtorqued.
This appears to be due to the fact that TVA's Division of Engineering Design (EN DES) did not supply Bellefonte Nuclear Plant Construction with a correct torquing value on some bolts for conduit in safety-related areas.
This resulted in overtorquing during field installation and may have caused some bolts to be overstressed.
Interim Progress The NCR has been trsnsmitted to EN DES for disposition. Additional test information will be necessary to determine extent of the concern. A review is being carried out to determine the circumstances contributing to this deficiency.
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