ML18283B044

44th Revision to Document Previously Submitted on 4/16/1975, Entitled Plan for Evaluation, Repair, and Return to Service of Browns Ferry Units 1 and 2 (March 22, 1975, Fire)

ML18283B044
Person / Time
Site:	Browns Ferry
Issue date:	06/15/1976
From:	Gilleland J Tennessee Valley Authority
To:	Rusche B Office of Nuclear Reactor Regulation
References
Download: ML18283B044 (8)

Text

NRC FoRM 195 I2.70)

U.S, NUCLEAR REGULATORY C EMISSION gOy r

NRC DISTRIBUTION FoR PART 50 DOCKET MATERIAL 50-259It~

FI LE NUMBER DOCKET NUMBEA TO Mr '

C; Rusche FROM: TVA Chanttanogga, Tenn.

37401 J, E, Gilleland DATE OF DOCUMENT 6<<15-76 DATE RECEIVED 6 18-76

%LETTER GkoR IGINAL OCOP Y QNOTOAIZE0 Im UNC LASS IF I E D PROP INPUT FOAM NUMBER OF COPIES RECEIVED J'

.signed DEscRIPTION Ltr trans the following:

ENcLOBURE /!"44th Revision to "plan for Evalua>>

tion,'Repair,

& Return to Service of Browns

'Perry 1 & 2(March 22, 1975) Fire" ~ ~ ~ ~

(45 cys encl record)

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PLANT NAME:

Browns Ferry 1 & 2 l

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kI:me!4M'AFETY ASSIGNED AD:

BRANCH CIIXEF:

PROJECT HANAGER:

LXC ASST'

FOR ACTION/INFO RMATION ASSI

~liED AD PRO C

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NRC PDR'&E OELD GOSSICK & STAFF MIPC CASE HA ES INTERNALD SYSTEMS SAFETY HEINEIIAN SCHROEDER ENGINEERING MACCARRY KNXGIlT SIWEXL PAWLXCKX ISTR I BUTION BENAROYA IPPOLITO KIRKMOOD OPERAT N

REAC ORS SITE S

ENV RO ANA S

N ENV ROJECT IIANA DIEN BOYD P

COLLINS HOUSTON PETERSON 1IELTZ HELTEMES SKOVHOLT LPDR:

TXC:

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ASLB ACRS CYS --'- EN REACTOR SAFEXY ROSS NOVAK ROSZTOCZY CHECK AT&X SALTZHAN RUTAERG EXTERNAL DISTRIBUTION NAT LAB:

REG; VIE LA PDR CONSUL'I'ANTS

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OPERATIN CH EISENH SHAO BAER BUTLER GRIIIES BROOKIIAVEN N+

ULRIKSON ORNL OLL CONTROL NUMBER 6197

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830 Power Building

,TENNESSEE VALLEYAUTHORITY

, CHATTANOOGA. TENNESSEE 37401 I

JUN 15 >976 Mr. Benard C. Rusche, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC, 20555

Dear Mr. Rusche:

,R,@tetgy Docket I'tie

'~f.4'g)

JuNl8>676 ~

Near rector co roraArortr r>roe r socrr~

I In the Hatter af the

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Tennessee Valley Authority

)

Docket Nos.

5 0-2 Enclosed are 45 copies of the 44th revision to a document previously submitted on April li, 1975, entitled "Plan for Evaluation, Repair, and Return 'to Service of Browns Ferry Units 1 and 2 (March 22,

1975, Fire)."

The gevision consists of the following:

1 Materi'al Revised Evaluation Plan Part Program for Sampling, Analysis, and Cleanup',of Residue on Affected Structures,

Systems, and Components This revision includes additional information regarding the surveillance program for electrical cables that have been coated with flame retardant material (Flamemastic 71A).

Instructions. for entering the 44th revision are also included.

C I

Very truly yours, ggCL L L' J.

E. Gilleland /

Assistant Manager of Power

~'t t~g Enclosures CC:

See page 2

An Equal Opportunity Employer

Mr. Benard C. Rusche JUN 15]976 CC (Enclosures):

Mr. Frank Long Regional Office

'U.S. Nuclear Regulatory Commission 230 Peachtree

Street, NM., Suite 818 Atlanta, Georgia 30303 Mr. Norman C. Moseley, Director (3)

Regional Office U.S. Nuclear Regulatory Commission 230 Peachtree

Street,

%f., Suite 818 Atlanta, Georgia 30303 Mr.

Co E. MurPhy Regional Office U.S. Nuclear Regulatory Commission 230 Peachtree

Street, NWo, Suite 818 Atlanta, Georgia 30303

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g8gU18tog 'Dock83 FJts PLAN FOR EVALUATION, REPAIR, AND RETURN TO SERVICE OF BROHNS FERRY UNITS 1 AN@ 2 0fARCH 22,

1975, PIRE)

Piling instructions for June 14, 1976, Revision.

Insert Part V, section B, page 37, attachment 5A,, dated 6/9/76

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V

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Section B

Page 37 Attachment 5A Recovery Plan BrÃlP 6/9/76 H. J. Green, Power Plant Superintendent, Browns Perry Nuclear Plant J. B. Calhoun,'hief, Huclear Generation Branch, 702 EB-C BROHi> EL~CTR1CAL CABTZ SUIVTr:ZEJAIiCE PROGRAM w

This memorandum,'~ucplments my memorandum to you dated April 27, 1976, and modifies the test inter'.s sp cificd, 1n that memorandum.

Because of concern of the LtRC that cocooning of the.electrics cables with Planunstic may cause heating and degradation of the cable, TA'<

has coded.tted to.".inspect and test certain celected cable )ac':ets periodic~.

An insp ction and test should be cade at the fi"'st unit 3. refueling outag, at the second uMt 1 refueling outage, and thereafter at a~roxhmte3y, 3-year intervals at the nearest unit 1 x'efue31ng outace';

A lcm-voltage ~r'ex cable was selected for sampling since it would continuous3y cary curr"nt of sufficient mgni.udo to produce lo.~-

level heating,'if any.

Contro3. and simal cables carry only sms11 intermittent currents which would produce no, or little, heat.

The cable packet~

was selected as the primary indicator of cable degradation.

'Cables PLL1 are s~e conductor, 400-IXM cour, with cross-linseed polyethylene insulation and a pol>-A.nyl chloride 1aczet.

The temperatuxe ratir.-. of the insulat1on is 90' and the tmnerature rating of the,]ac'.sc" is 75 C.

Calc~tions baced on the thermal resistance of.t'ice'nsulation, "acket, and appro:M~tcly 100 p rcent of normal current flo;z show that th tern crature differential bet;;con the conductor "nd:~~he'utside of the insu'"ticn is 3.47',

and bebreen the conc'uctor'nd the,out"'dc of the gacI:et is 4.73'.

Since the temoeraturc rath'f the insulation is 15'

@eater than the gacI et, it 1-evident that a~ thex~ degradation, if any, of the cable xrl33. be detected first in thc )acket.

J. R. Calhoun, CCF;FVH;CJC

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