ML20154D350
| ML20154D350 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 02/20/1986 |
| From: | Gridley R TENNESSEE VALLEY AUTHORITY |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| SCR-BLN-4657, NUDOCS 8603050586 | |
| Download: ML20154D350 (2) | |
Text
e TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 37401 SN 157B Lookout Place r
February 20, 1986 h
r, BLRD-50 438/86-05 7,
BLRD-50-439/86-04 e-U.S. Nuclear Regulatory Commission 3
Region II Attention:
Dr. J. Nelson Grace, Regional Administrator y
101 Marietta Street, NH, Suite 2900 y
Atlanta, Georgia 30323
Dear Dr. Grace:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - CABLES INSIDE VERTICAL CONDUIT RUNS ARE UNSUPPORTED - BLRD-50-433/86-05, BLRD-50-439/86 FIRST INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector Art Johnson en January 21, 1986 in accordance with 10 CFR 50.55(e) as SCR BLN 4657.
Enclosed is our first interim report.
We expect to submit our next report on or about one year before fuel load of unit 1.
If there are any questions, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITV R. L. Gridley Manager of Licensing Enclosure cc (Enclosure):
Mr. James Taylor, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Records Center Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 Dj0 06 06022o S
CK 05000430 PDR I
\\ \\
An Equal Opportunity Employer
,0 ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 CABLES INSIDE VERTICAL CONDUIT RUNS ARE UNSUPPORTED BLRD-50-438/86-05 AND BLRD-50-439/86-04 SCR BLN 4657 10 CFR 50.55(e)
FIRST INTERIM REPORT Description of Deficiency Some safety-related electrical cables routed inside vertical conduit runs are not supported at the top of the vertical drop in accordance with TVA's General Specification G-38 Revision 5 (G-38 RS), " Installing Insulated Cables Rated Up To 15,000 Volts."
The condition was identified as a result of a generic investigation of Hatts Bar nonconformance H-262-P.
The apparent causes of this condition are (1) the failure to include vertical cable support criteria in G-38 for approximately four years and (2) the failure to adhere to the criteria during installation for a period of time after G-38 revision 5 was issued.
Safety Implications Cables subject to the identified deficiency could experience conductor degradation and/or insulation failure at cable or conduit bends due to the weight of unsupported cables and contact with the metal edges of cable trays or conduits.
In addition, cable terminations could fall due to the same applied forces.
This could degrade or interrupt safety-related power supplies thus potentially adversely affecting the safety of operations of the plant.
Interim Progress TVA is reviewing the installation requirements provided in G-38 R5 to determine the required and appropriate corrective actions.
TVA will provide a final report upon determination of the corrective actions but no later than one year before fuel load of unit 1.
.