Text

Qualified Life of Brand Rex Cable 1D23R47A.
	ML20043B718
Person / Time
Site:	Perry
Issue date:	10/05/1985
From:	; BRAND-REX CO.
To:	;
Shared Package
ML20043B699	List: ML20043B698; ML20043B703; ML20043B710; ML20043B716; ML20043B718;
References
	QULT-7600, NUDOCS 9005310196
	Download: ML20043B718 (6)
	v • d • e

. . .-. . . .-. .

I i

, CALCULATION CONTINUATION SHEET SHEET Y OF 1 1

CEI CALC NO. E & ogy DCP NO. ASSIGNMENT NO. Ec782 b SUBJECT gh4J L;Q eQ hy Rex enk,\e to33gyqA atvistow 0 1 2 3 4 PREPARED By/ Daft ,

CHECKED /VER!r![0 BY 6 /STW '

Dott r- P- 96 far A c n4. - QuohGed LG A Cokk. \DE3R47A viincj on Ac_hochon Eng e F z.1122.

Cuakked L6c am e /6 8 e' ? * /o S/79 Se:

Re minine) hh e,a = (oCl*79 - 3450

Co/S A9 hrs Q.nh4ed L;fe.g , = (,15 29 c. - ("~ 8

= 2 /620 A c4 I 7h eguohGed life & %d Rex code ion 3897A ustr9 on oc.Invohon e.ng o 9 2,1/EE egu:2b *2 / 6E0 + 3650 = M2.70 br>

2. BBY6 gerJ .

4

(. soce. den?

Assumine) o l 4hc Brond Rex. movJcobie.mom over9 a ivdoten4 +c.9. e f E2.1 lD23R47A t.A reptre,replaceme.n+ e

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! 9005310196 900521 PDR ADOCK 05000440 P FDC l

PN'# No. 6077A At v. 2164

1 CALCULATION CONTINUATION SHEET SHEET _5_,0F J CEI C AL.C . NO . EO-ops DCP NO. lASSIGNMENTNO. Bo362 -

C SUBJECT occh.Ged Lt.Ce J % ncl Rex CAde t o;t 3,M 7A REVISION 0 1 2 3 4

~

PREPARED BY/DATE ~

CHECKED /VER!r!ED BY OATE O.7 M7N - ?~lf) f' bet (S Co\celohon os'tg on oc.haben ency refert:nced frem

+he Rock beslas repr4 QR-Seoy, +ha gu.ol, Red /Te of Bo:inel Rex cable. tom 6M7A will be ccicubled.

FronL lia Re-Poc4 F-C512o-l provtdes 2. scIs of aginc) doha applico\o\c 4o Ms ca\o\e, 158'c //68 brs and 150 c/is s kes . AHhov9h previous c.a\eulohans u4ilir.ed Sc. 174,*c/No8ke agirg 4- conscroo ,3.gg y I isc-d,a; u 4 4 L z =~=:.,a,o91n9 '

cf 15c

C/l(o6 he s is che accepkble %e use . 'The-PNPP acc.\clen-\ pec9iIe. I5 enuelcpecl hy +k LOCA -fes'b' pdormd by Fronk I:n Aescaech Cerrkr. A s wwn4k

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= = .;a.--

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= 2 .9 9 8 Wr.3

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bre. s ,

. .' MULTICouDuc. Top .

. REPORT fQULT-7600 ,

l LONC TERM THERMAL AGING j ARRHENIUS PLOT -

40 YEAR LIFE :l 8 .

CENERAL: The following Information outlines our approach and technique in verifying the 40 year service life of our cross-linked polyethylene insulation. Brand-Rex designation T-162.

1 PURPOSEi To estabjlsh' the aging temperatures,' failure criterion and Arrhenius plot for our cross-linked polyethylene insulation

, such that a minimum 40 year life at 90*C (rated temperature) '

can be verified.

ARRHENIUS TECHNIQUE: The arrhenius equation-is generally considered j to be tne best method of approximating the relationship '-

between l Insulation life and temperature applicable to the 1 service Ufe of an insulated- conductor. By selecting' aging

l temperatbres well above the expected normal o

l temperstbre and establishing a failure criterla,perating a set of data zints can be plotted. From.this point, an Indication of

~

j nsulation performance can be extrapolated by shorter terai ,,

e agings. .( ;

b. . . . .

BRAND-REX APPROACH: Scmples were prepared in two ways. Ten groups ,

of tnree samples were prepared by stripping the. insulation

.' from thei conductor to make standard specimens for tensile and elongation measurement. . Secondly, four samples 8 feet long were made into 6 inch coils for dielectric strength measuremer.ts. -

AA - Aging was accomplished by placing samples of the insulation in evens at four different temperatures and aging ,

until failure occurred.

~

Three Blue 'M' forced draft ovens were used in this test. ,

All three ovens satisfied the ruuirements of ASTM-D-2436.

The air flow was adjusted to se approximately 160 air changes cer hour. The four test temperatures were 113*C, 121*C, 136*C and 150*C.

I em-se casar a c C?~2"A" =C;M=W.~:J'C.;;;;"%

-l

. i M C1 t r . . . . . - w. -*v . . : . . a.J 44 -at. M e !

AH. I Sn 2./V

corporsuon saano. aux cAsi.: sysrAus 0 vision i 1600 West Man Street .

+ wumanne. c7 :sz2611as !

f 20lF456 8000 ; l

\

.

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_ BRAND-REX APPROACH - cont'd. -

Failure C'riterlon - Testing for failure was accomplished by twc - i methocs. At specific intervals orje group of three tenslie samples ,

was removed from the oven, cooled for 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months at room temp- -

> erature and tested for tensile and elongation according .to standard i industry practices. Secondly, approximately 18 inches were cut -

from each of two cells and cooled for 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months at room temperature. l Each coil was then attached to a mandrel whose diameter was eight .

times the diameter of the insulation while a it.5 pound weight was '

attached toi the other end. The sample was then wound on the mandrel boih clockwise and counter-clockwise, twice in each

. direction. lUpon removal from weight and mandrel, the sample :

was examined for cracking; if none were . observed, it underwent !

. , a dielectric: test.

l .

The dielectric test consisted of a one hour soak in a 1% NaC1-Water

solution. \!/hlle the sample was still immersed. 4 KV AC was applied for 5 minutes, "The voltage was applied at a rate of J50

~

volts /seconid. If no failure was observed, the voltage was in .

i creased at .500 volts /second until the sample broke down. The - .

wall thicknyss was then measured at point of failure. .

w !

Failure was considered to be the failure of the insulation to with-

. stand the c KV-AC for 5 minutes or if cracking was observed in the mandrel test. The tenslie-and elongation measurements c -!

were made only to correlate with the dielectric test. . ( -

i I . 1 The failure: times for this compound are as followsi- ,

Test Temosrature Voltsce' Pallure Time 150*C 394 Hr.

136*C 1064 Hr. -

121*C 4320 Hr.

113*C 15684 Hr. 1

+

b a c s.w tw d aA c.dene .usw Tenee 1

l

!,, A G n* '*i? 113'.3 3:Wi!"I-( 0*IT.5A.J.3 223 456.1304 eme=T- l 1

. AH. I Sh Y/ V, l e saame.asz casLa sys7 sus styisioN

- 1800 West Man Sueet .

- wwnense. ci osm.tias

I 2 0 456 8000 I

ARRHENIUS PLOT: The above temperature and failure times were used on .

an Arrhenius plot in which the' log of time to failure is plotted-against the reciprocal absolute temperature. The point at which this plot crosses the rated tempesture line is considered the thermal life of the material.

It should be noted here that the Arrhenius technique is valid .

if only one ; chemical reaction is' controlling the insulation aging i process. C,iur cross-linked polyethylene is formulated with many Ingredients.: each reacting differer+'y with respect to time and s

temperature!. On this basis, tL m . ct aging points are the closest representation of 90*C - ;e - 'sequently our plot is a point to point and not a bers n ~ ';ht line '

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QUALITY ASSURANCE ENGINEER UTILITY ENGINEERING MANAGER '

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- b g BRAND REI CASLE SYSTEMS DIYlSION z

seco wes: uom see.i 06:26 1128

.- . Wilbrim.*.nc.

ra . .'.'.T ,

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, LONG TEM THEMAL AGING ARREENIUS. PLOT .

40 YIAR LITI 1,000(000 ,

CF.0S5-13 RID POLYETETI.INE US7LATION gu ;

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3 M '! '

. . # SECRT TERM AGUG POUT

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ton l l lM '

l l -l l l' ll 90 100 120 140 160 180 700 .250 300 TEMPERATURE, 'c (RE!?ROCAL ABSOLCTE TEMPER.LTURESC,hEI) -

Aapest treno% Canne $4was tra ,.aes L _ _ c n- 6.m trans.nes wanes Erh 8'ep4 peen. 7, erst ,emptMit *e $dspo ases.sne (,.orgre, h h. Teagrum

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ORAND-REX

a. 3 COMPANY ;

An Alftliste of Ceble:Corporetton

~

1600 war. Mem Street WILLIMANTIC, CONNECTICUT 062261128 i 203/4SE000 FAX 203 4%1305 P

PAGE / OF'/ FAX #' w -

08 8 70: . c EI- 477:u7 en: YoA, @c 4v//t 1 i

1 FROM: 575VE ' SA un ACA G- ) t l

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DATE: 9 90 CC: r

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MESSAGE: t

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WGf. V6v/l FAY o P' //$,/9o' <

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1 Acric/&r>sd f/Fe rn Ax cux

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'"'# ee 7, BRlrted corporation ay BRAND. REX CASLE SYSTEMS DIVISM>N 1600 West Mem .itr**t Wi.9mante. CT 06226-1128 203 456 6000 June 25, 1987 4

American Electric Power Service Corp. '

P.O. Box 16631 Coltsabus, OH 43216-6631. -

r Attention: Mr. Robert Heurich '

(li '

Ra ference : - Indiana & Michigan Electric Co.

Donald C. Cook Generating Plant l P.O. #02655-041-5X ,

Control cables 1

Subject:

Brand-Rex Nuclear Qualified Crosslinked- Polyethylene Insulation - j Arrhenius Plot / Ac tivation, Energy ; j v

Dear Sirs:

As a follow-up to your telephone request of ' June 25th, Brand-Rax states that the Arrhenius Activation Energy for cables on the- above' referenced ' '

Purchase Order is 2.13 electron volts. e ..

Trusting this information-is ' satisfactory,-' we remain, Very truly yours,

(' ..-

l 3 RAND-REX CAB 1.E SY$TEMS DIVISION

. l l i Ste he J. S ber Utility Industry Manager

l kmw i I

cc: Rich DeHay

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e Ggaef t M4.e ls 8'ed MLema . Te4t9%.)

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ML20043B718

Text

Subject:

Dear Sirs:

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