ML18033A749

Responds to Re Electrical Cable Ampacity.Item a Interpreted as Stating That Cable Does Not Have to Operate During Accident That Creates Transients in Excess of 205 F

ML18033A749
Person / Time
Site:	Browns Ferry
Issue date:	05/11/1989
From:	Black S Office of Nuclear Reactor Regulation
To:	Kingsley O TENNESSEE VALLEY AUTHORITY
References
TAC-62260, NUDOCS 8905190181
Download: ML18033A749 (4)

Text

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4'j UNITED STATES UCLEAR REGULATORY COMIVIISS oJ WASHINGTON, D. C. 20555 May 11, 1989 Docket No., 50-26~0~~

Mr. Oliver D. Kingsley, Jr.

Senior Vice President, Nuclear Power Tennessee Valley Authority 6N 38A Lookout Street 1101 Market Place

~ Chattanooga, Tennessee 37402-2801

SUBJECT:

BROGANS FERRY NUCLEAR PLANT (BFN) UNIT 2 - ELECTRICAL CABLE AMPACITY (TAC 62260)

Reference:

Letter from R. Gridley, TVA, to Document Control

Desk, NRC, "Electrical Cable Ampacity," dated February 21, 1989.

This letter is in response to the referenced letter.

The staff understanding of the agreement reached at the February 2 and 6, 1989 meeting on Cable Ampacity held at Browns Ferry and Rockvi lie, respectively, is essentially the same as in your referenced letter.

The enclosure to that letter reads:

For areas exceeding 205'F during a postulated

accident, the subject cables must meet one or more of the following criteria:

a.

the cable does not have to operate during the accident that creates the transient in excess of 205'F, or; b.

the cable does not have to operate until the temperature decreases below 205'F.

A more accurate enumeration would state:

Item a.

the cable does not have to operate during the accident (includes post accident operating requirements) that creates the transients in excess of 205'F.

S905i90i8i 8905ii PDR ADOCK 05000260 PDC

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.= Mr.,Oliver D. Kingsley, Jr.

Concerning Item b, staff comment is:

TVA should provide the NRC with the temperatures,

times, and 'locations (in table format) in the reactor building during which ambient temperatures will exceed 205 degrees F.

TVA should clearly understand that use of this generic qualification methodology for crosslinked polyethylene (XLPE) cable is based on the understanding that temperatures and, times during which an ambient temperature of 205 degrees F would be exceeded were of a relative short duration (approximately 10 minutes) and under a maximum'emperature, of 300 degrees F.

TVA should modify Item b.

to restrict their use of 'this qualification methodology to the values for times and temperatures'requested above.

f If you have any further questions regarding this matter, you may contact David H. Moran, Project Manager, at 301 '(492-0766).

The reporting and/or recordkeeping'equirements contained in this letter affe'ct fewer than'en"r'espondents',

therefore, OMB clearance is not required

under, P.L.96-511.'incerely, Original s>oned bY

" Suzanne C. Plack, Assistant Director for Projects TVA Projects Division Office of Nuclear Reactor Regulation k

cc:

See next page Distribution NRC PDR Local PDR Projects Reading ADSP Reading D. Crutchfield B.

D. Liaw S. Black R. Pierson B. Wilson W. S. Little M. Simms D. Moran G. Gears T. Daniels N. Markisohn OGC B. Grimes E. Jordan ACRS (10)

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'Mr. Oliver D. Kingsley, Jr.

w3w CC; General Counsefj

'ennessee Valval'5y,'uthor)ty 400 West Summit"HilT. Drive E11 B33 Knoxville, Tennessee 37902 Mr. C.

H.

Fox Tennessee Valley Authority 5N 157B Lookout Place Chattanooga, Tennessee 37402-2801 Mr. 0. J.

Zeringue Tennessee Valley Authority Browns Ferry Nuclear Plant P.O.

Box 2000

Decatur, Alabama 35602 Mr. P. Carier Tennessee Valley Authority Browns Ferry Nuclear Plant P.O.

Box 2000

Decatur, Alabama 35602 Mr. D. L. Williams Tennessee Valley Authority 400 West Summit Hill Drive W10 B85 Knoxville, Tennessee 37902

Chairman, Limestone County Commission P.O.

Box 188

Athens, Alabama 35611 Claude Earl Fox, M.D.

State Health Officer State Department of Public Health State Office Building Montgomery, Alabama 36130 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street, N.W.

Atlanta, Georgia 30323 Resident Inspector/Browns Ferry NP U.S. Nuclear Regulatory Commission Route 12, Box 637

Athens, Alabama 35611 Dr. Henry Myers, Science Advisor Committee on Interior

.and Insular Affairs U. S.

House of Representatives Washington, D.C.

20515 Tennessee Valley Authority Rockvi lie Office 11921 Rockvilie Pike Suite 402 Rockville, Maryland 20852