ML20136F910
| ML20136F910 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 10/30/1985 |
| From: | Hufham J TENNESSEE VALLEY AUTHORITY |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8511220216 | |
| Download: ML20136F910 (2) | |
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.4 TENNESSEE VALLEY AUTHORITY CH ATTANOOGA. TENNESSEE 37401 l-Chegsggt%reetTowerII 4
October 30, 1985 BLRD-50-438/84-25 BLRD-50-439/84-24 U.S. Nuclear Regulatory Commission Region II Attn:
Dr. J, Nelson Grace, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Dear Dr. Graces BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - SUPPORT FOR CABLE TRAY RISER CONNECTORS
- BLRD-50-438/84-25, BLRD-50-439/84 FINAL REPORT The subject deficiency was initially reported to NRC-0IE Inspector D. M. Vercelli on March 8, 1984 in accordance with 10 CFR 50.55(e) as NCR BLN
' CEB 8402. This was followed by our interim reports dated April 4, 1984 and January 25 and July 19, 1985. Enclosed is our final report which indicates that we no longer consider the requirements of 10 CFR 50.55(e) applicable.
i If you have any questions, please set in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY
. M. /gydppgA4
. W. Hufham, Manager Licensing and Risk Protection i
Enclosure I
cet Mr. James Taylor, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Connaission Washington, D.C.
20555 Records Center (Enclosure)
(
Institute of Nuclear Power Operations 1100 circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 I
l 8511220216 851030
{DR ADOCK 05000438 PDR An Equal Opportunity Employer gg
f ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 SUPPORT FOR CABLE TRAY RISER CONNECTORS BLRD-50-438/84-25 AND BLRD-50-439/84-24 NCR BLN CEB 8402 10 CFR 50.55(e)
FINAL REPORT Description of Deficiency Adjustable riser connectors for electrical cable trays were not supported on each side of the hinge bolt in TVA designs as recommended by P-W Industries, Incorporated, the cable tray manufacturers.
Safety Implications The subject connectors were analyzed to determine if they have adequate load-carrying capacity for the manner in which they are presently being supported. However, the analysis did not yield definitive results; consequently, a test program was designed and executed at TVA's Singleton Engineering Laboratory.
TVA tested the riser assembly to document the load carrying capability of the connectors. These tests demonstrated that the hinged connectors as presently supported are capable of performing their structural functions during a seismic event with no adverse effect on any safety-related feature.
Design modifications of existing features are not required.
Therefore, since no condition adverse to the safe operation of the plant existed, TVA no longer considers this condition reportable under the provisions of 10 CFR 50.55(e).
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