ML20128C106

Discusses Util Resolution of Cable Separation Discrepancies Associated W/Cables in Divisional & non-divisional Cable Trays Which Are Physically Connected.Staff Accepts Util Resolution of Issue.Discrepancies Result of Computer Error

ML20128C106
Person / Time
Site:	Browns Ferry
Issue date:	01/28/1993
From:	Hebdon F Office of Nuclear Reactor Regulation
To:	Medford M TENNESSEE VALLEY AUTHORITY
References
TAC-M85297, TAC-M85298, NUDOCS 9302030316
Download: ML20128C106 (3)

Text

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January 28, 1993  ;

Docket Nos. 50-259 and 50-296 Tennessee Valley Authority l ATTN: Dr. Mark 0. Medford, Vice President i Nuclear Assurance, Licensing & Fuels l Tennessee Valley Authority 3B Lookout Place  !

1101 Market Street Chattanooga, Tennessee 37402-2801

SUBJECT:

BROWNS FERRY NUCLEAR PLANT UNITS 1 AND 3 - RESOLUTION OF CABLE SEPARATION DISCREPANCIES (TAC NOS. M85297 AND M85298)

By letter dated April 8,1992, the NRC staff provided a safety evaluation of cable installation and separation issues for the Browns Ferry Nuclear Plant (BFH) Units 1 and 3. This letter requested that the Tennessee Valley Authority (TVA) provide additional information regarding cable separation discrepancies associated with cables in divisional and non-divisional cable trays which are physically connected. TVA responded to this request in a letter dated December 29, 1992. This letter documents the NRC staff's evaluation of that response.

TVA performed a 100% review of Unit 3 cable trays to identify cable separation discrepancies. Two cables were identified as violating separation criteria.

In one case, cable PLll63, TVA committed to double-isolate that cable. TVA also committed to reroute cable 3PL575 to satisfy separation criteria. These corrective actions will be completed prior to restart of BFN Unit 3. The staff accepts these commitments.

TVA stated that the cable separation discrepancies were the result of an error in the computer program used to route the cables. BFN Units 1 and 2 cables were manually routed. Therefore, BFN Unit I cables are not subject to these discrepancies by this mechanism. The staff accepts this determination.

However, the staff requests that it be informed of the disposition of any additional BFN Units 1 and 3 cable separation discrepancies which may be identified, regardless of the cause.

Sincerely, Freder c"k"J. 2e"bdon,# Director Project Directorate 11-4 Division of Reactor Projects - 1/11 Office of Nuclear Reactor Regulation cc: See next page n 0FC PDll-4/LA PDil-4/Pt}$) PDil-4 /D[6' EELB b b PDil-4/D_s NAME MSanders @ JWilliam[as TRoss / M CBerlinger FHebdonN-DATE 1/W93 1/27/93 1/JI/93 1/ 2/93 lhR/93 020040  ; .

9302030316 930120 PDR ADOCK 05000259 P PDR.

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Y , f tu Tennessee Valley Authority-ATTH: Dr. Mark 0. Medford i cc:

Claude Earl' Fox, M.D.' '

Mr. John B. Waters Director.

Tennessee Valley Authority State Health Officer. - -

ET 12A State Deptr of Public Health-400 West summit Hill Drive State Office Building-Knoxville, Tennessee .37902 Montgomery, Alabama 36130 ,

Mr. J. R. Bynum, Vice President Regional Administrator Nuclear Operations U.S.N.R.C. Region !! -i 3B Lookout Place 101 Marietta Street, N.W.'

1101 Market Street Suite 2900 -

Chattanooga, Tennessee 37402-2801 Atlanta -Georgia 30323 Mr. Charles Patterson.

Mr. R. R. Baron, Site Licensing Manager Senior Resident Inspector Browns Ferry Nuclear Plant Browns Ferry Nuclear Plant- '

Tennessee Valley Authority U.S.N.R.C.

P.O. Box 2000 Route 12. Box 637 Decatur, Alabama 35602 Athens, Alabama 35611 3 Hr. 0. J. Zeringue, Vice President Browns Ferry Nuclear Plant fennessee Valley Authority '

P.O. Box 2000-Decatur, Alabama 35602 Mr. M. J. Burzynski, Manager Nuclear Licensing and Regulatory Affairs 1 5B Lookout Place Chattanooga, Tennessee 37402-2801 TVA Representative Tennessee Valley Authority 11921 Rockville Pike -,

Suite 402 Rockville, Maryland 20852 '

General Counsel Tennessee Valley Authority ET llH 400 West Summit Hill Drive Knoxville, Tennessee 37902-Chairman, Limestone County Commission P,0. Box 188 Athens, Alabama 35611 l .-

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o oF DJSTRIBUTION Docket File-NRC & Local PDRs S. Varga 14-E-4 G. Lainas 14-H-1 F. Hebdon V. Nerses J. Williams T. Rcss H. Sanders OGC 15-B-18 C. Bcrlinger 7-E-1 ACRS(10)

BFN Rdg. File B. Wilson R!!

E. Merschoff R!!