ML20059L574

Forwards Rev 2 to Browns Ferry Nuclear Plant Cable Issues Supplemental Rept Corrective Actions,Sept 1990. Rept Revised to Clarify Cable Bend Radius & Support of Vertical Cable & Document Resolution of Jamming Issues

ML20059L574
Person / Time
Site:	Browns Ferry
Issue date:	09/19/1990
From:	Wallace E TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20059L576	List: ML20059L574 ML20059L577
References
TAC-62260, NUDOCS 9009270133
Download: ML20059L574 (3)

Text

. TENNESSEE VALLEY AUTHORITY 3 CH AiTANOOGA, TENNESSEE 374o1 SN 137B Lookout Place  !

SEP 191990 U.S. Nuclear Regulatory Commission ATTN Document Control Desk  :

Washington, D.C. 20555 centlemen:

In the Matter of ) Docket Nos. 50-259 Tennessee Valley Authority ) 50-260 50-296 BROWNS FERRY NUCLEAR PLANT (BFN) - UNIT 2 - RESOLUTION OF CABLE INSTALLATION i ISSUES SUPPLEMENTAL REPORT CORRECTIVE ACTIONS - CABLE PULLBY .

Reference 1. TVA's lette- to NRC dated June 19, 1989, Electrical Cable l Insta11at.vu - Revised Valkdown and Summary Reports l (TAC No. 62260) *

2. TVA's letter to NRC dated July 10, 1990 - Cable Installation Issues Supplemental Report Corrective Actions This' letter transmits BFN's report titled " Cable Installation issues Supplemental Report Corrective Actions." This report supercedes the re'jort i transmitted by Reference 2.

Reference 1 transmitted a summary report (dated March 1989) on the evaluation of BFN cable installation concerns. Reference 2 transmitted a summary report which addressed the recommended actions contained in the March 1989 report l required to resolve BFN's cable issues. Additionally, Reference 2 contained a i summary of the remaining actions required for closure of BfN cable installation concerna except for cable pullby. The cable pullby program is now complete and the report transmitted by Reference 2 has been revised to provide the results of this prog am. Additionally, this report has been revised to clarify cable bend radius and support of vertical cable, and to document resolution of BFN's januning issues with NRC.  !

It should be noted that during the hi-pot testing being performed to resolve the cable pullby issue, cable damage was identified. However, the. damage was

-attributed to a disconnected cable bushing at a mio point pull box (JB) and not cable pullby. Subsequent to the discovery of this anomaly BFN established a program to identify conduits at JBs with missing bushings. Enclosure 1 contains the results of the walkdown and subsequent hi-pot testing that was -

performed to resolve this issue. Conduits'at JBs with missing bushings were identified during BFN's walkdowns, but the hi-pot testing and investigations of the ef fected cable indicated that cable damage that was originally identified during the cable pullby testing program was an isolated case.

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. m U.S. Nuclear Regulatory Commission ElEiP 191990 l i

It is TVA's position that the agressive program of walkdowns, inspections, and ,

testing confirms that cable installation damage is not present at BFN and the enclosed report provides the documentation required for closure of this issue by NRC.

Enclosure 2 identifies the commitments contained in this submittal.

If you have any questions, please telephone Patrick P. Carier, BFN, Site Licensing, (205) 729-3566.

Very truly yours, TENNESSEE VALLEY AUTHORITY

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E. G. Wallace, Manager Nuclear Licensing and Regulatory Affairs Enclosures cc (Enclosures):

Ms. S. C. Black, Deputy Director Project Directorate II-4 U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike, Rockville, Maryland 20852 NRC Resident Inspector Browns Ferry Nuclear Plant Route 12, Box 637 Athens, Alabama 35609-2000 Mr. Thierry M. Ross, Project Manager U. S. Nuclear Regulatory Commission One White Flint, North 11?-sh Rockville Pike Rot'/.1113 Maryland 20852 Mr. B. A. Wilson, Project Chief U.S. Nuc. ear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 4

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CABLE INSTALLATION SUPPLEMENTAL REPORT 1

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