ML19256A796

Specifications,Tests, & Installation of Wires & Cables for the Diablo Canyon Nuclear Power Project, IEEE Rept F 76-430-9.Describes Process of Selecting Wires & Cables & Criteria for Fire & Environ Tests

ML19256A796
Person / Time
Site:	Diablo Canyon
Issue date:	05/04/1976
From:	Dan F PACIFIC GAS & ELECTRIC CO.
To:
References
NUDOCS 7901160163
Download: ML19256A796 (9)

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Test No. 4 During the pr:vious pha* ef fl:me election, s. Inre nuober of Twenty nar umple . cf mtdticcr.ducter c.bk wer tested vith k pronn,g dbs wac dmbted. The fins tep g was per-the fitter 1 u.ncr appted for t!uee n.iwtcs. 'Ibc }arpme was to formed on 31.i:@ candu;to s #10 AWG (5.2 sam') er sm2'Ijr.

obtain infermtix ca h thne requhd to i;iM the 70'!!2 AWG f finf ei con.htaa ' S AWG (5 ? r.m ) 2ta 1/0 AWG (53.5 rm..

2 (3.3 mm ) uths. Obvivatio n were made throacMut the test.The and 18 rtuhiconducto:s 7-n12 AWG (3.3 mm2). Each test xas results were cons %nt v.ith thw o'tained in Tcst No. 3. A 69 rgeated t'acc tim s for each ty pc of cab!c.

s< condi appLatio. was chen for f urth r Usts on rauiti.:onducts cet h s. Sampi;s of the small s!ngk cenJucters were trec J with the Tin.il bumer oppted fo:r times fer 15 seconds v.ith 15 second off Test No. 5 paiods betwer. spibutiens. De 1,uinst was r.ot reir.ited if fkmcs A s,mA number of 5.am;.I:s of raedium volic cAle, multicon. were still present at the end of the off pericds.

ductor centrc! cab:e with an ourali diua ter in excess cf 2.54 un calle 1. rpr than #2/0 AWG Sueples of the muhic@yr and lairr sinde condactors w-re and (67.4sing ran"()wnductor wre tested law udagscitare a hrr:t brret (nade by Rarem:' tested with the Fnber burner replacing t5e Tirrill end using the same Company, Model No. S-E li) capabir of a mutt. peater output than procJure, the Fist.cr t-urner. De resuhs of these preliminary tests war incon.

clesiv:. It was then decideJ to Lmit the secpc of tbc prorram in time Tour tr2ys, inaded with c.ibles with the four most prcmismg and c# by conwntratir.r the cfferts on ipition scumes saitable fo* tyrn of ina.htio . were tuted unnt the Pamomt bu m r as

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j i g mrnum of 103 hours0.00119 days <br />0.0286 hours <br />1.703042e-4 weeks <br />3.91915e-5 months <br /> 10 1 a

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my it is scry important to report that samp*cs No. ? cnd No. 3 j \ were pa' of a lir.gcr pice: of cau: rresioualy aged for 240 hours0.00278 days <br />0.0667 hours <br />3.968254e-4 weeks <br />9.132e-5 months <br /> q.

t in an caen at 20VC. The cable was arc d with a l end in it " a pnrosi-i L

raately .M5 cm in Dian:eter, and scenples 1:a. 2 and No. 3 were purposely cut from the l'end fortion. He surface of the jacket was s ,mewhat f.adncJ. He sarcq les v cir carciully s.rair.htened, t~ fi v ir er.fh t t f 01 fes. crec ory, for cre ec3ies observinP the tiny ca;Ls that d:velc;vd on the indde of the bcnd.

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wa no ch:nte ia Cie aptn of crd :dwr the emiscaraental test.

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CABf E SPEClf!CA90NS Tic f asi doks ws in fer of:

Nfety, p:ifvo, me wi ewnomy were 19 fint ecd krdrnt O) A speci?My enr.ound:d, imit:J XI "E Mt'. c xcQat D, op of 16 : po; i ie .' 12m v x i > .x2 ue u! ; of d ta sJr<2n #ucq.dwnterntscs arm e lw wrimin ef Ret.

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krge size anluctv l'cer ! :ir if tiSczt.cns crc scAdad for Pe bw of u Mn i.dt&d H h pue that ( tita cutmica of taa 220 6 end

'E LV st;'y J .). b ccpt Ic.r th: th::mxnvr:e c x ts re.m wue, (c) A SiHcene l'uRei comm Lnd r td fer con!inco s u at 130^C, n liae i r.d mektta: 1:Junt with . fD the :.ekc'ed emh f or rutrin! u as ccpr r. rcted4 i GPi~ prk:t.

ti. diam Voh:q ltvu C-d 'e Emi'Ut;cn A 19rcOI tc t va im 'ed fer ta: hni two irc:m to ott:rn oc r

the pu W ly of WW ' m t' v.r e - 'm a ymd of a: hcur 11.is peup inc'uad 15 kV utca ce (part of it in ' of the at d e N t sa :r.t)- a : rara c c: M C. Th: . , ' . , ni to y c' w th<

n.a conf :.c 1 thi em'3 i dr h c . : ef :. : . hn: 1:d. il riox-1h r:q%ern.:nb u re r' ,to ; Etd Odyt thybac (X11 n w i<ty vf a mjust. G q.o y

!n of - t ec it s a nre er ud tt et h> I;re r m;g !. i. : 2 N :s (!?!.J n R a W 2<a: W u;&J .n ; cxt.: ed to t' < M PC tmpn ccm fa :. r:riod of tur.:

W U, cu , .d i . I cn M it <er izrem +i the rg ni D:th = ;; hs rafor:nto s ida :t W tv

• M r i rr L, , , W u;th 4 '

rm 1:,r:t dj c UrwtWJei,J,knr , % 7 ni f; a Up:-t mt.

qt)Nf)ph ' a g e.t

( W je.le in . ,rn t h * , s . ; 2.M ra.n fer ' 5 kV m' > ;;nd 5 % m ,fc .'s l ' , ', i ts Ewm f.o O c C' , u n I : t i int uM Centrr' C;bb Sp:d wn 114VoJ oitt c. tE$ um a. h ( 9 L '

. : v. : ch ta r # : - ).aj sit.e ' c' ni, p c.np N tan m ^ e Mi n. d :O , f'M V nt,d b ', ,-ru to j h n - 1, . 'o Ct m :c. ' a 11 ; f: .t, c. & fm tv '

1 cW 9 Co. . n ;r t IL f. .r 3n.m) 0, p sifcu. ,w o cry rn:r: t trjd - ' sd C: , I o. , i i , . W 1,12 emech v :

tin Ar to a s.id ' f to .! h ' % N i O). ,, m * . C. < 1 : s > : A d. s c,seu .a C L - t: erI c r eM-The fim! A ' w :. ' . i;mr of t'. exccrt for th tdjit:oa of ta e, nH p i et, fe ete ,cordicter Lim R Lmci E a cms st:' M thu Mit at L ' cr rmt a t lor ra nc:e we v.

,

4: r n .,

f. t (c o if a c) ih eMt - i r f r d e ' ':: pe .d h. t dill The luy (brar te:1 v7s chrnr:d to a s:rt: 0 t; tem. rn r ! :m! ::

non -JI y the - cr!m sme cwen,li q It meats v.J acyed. sms s- P  % an 0.is si $ 7,tm u a a 'i I, a V..rliv Gmap

• l< '.' Voiv r fuer Mk Syna tbn of pe LIFE wu prerm . ;

• UM fu V in Lt:.ticn c f win ar.d cd b . I c a t'r M n t. T - ~tho t n a rueda of thai u n.p :n1 a

!h t n "p iv!: Ed W " rated w% for u.: iWJ; md sub that il ' tS urPal 1:;t ve? , i W nu ub, c,f edk a.. d W -

side the cent Jar vi. and Clw I powen ubb t,ut, r, ! O e 70,( 90 h r%r fhec wa rw e wit'cty act ptrJ. I y t':e r^ tend cM wrrW, i; n 1N Imr H;rv of th.' PG:. dE tyst.

W squi m:: M varc :or:

Ter the sins: coaduaor ceatrd wire the fin chc4w o s

(a) Sir @e cor hcron, fiane uta! dint heat and naisttL reW: nt w.s-L1 tc ? r4 cthy:,r4 (XLPD u..pken : 1) XITE.

(la 5m!c cordo;ti , hcat anJ me.i Nie mishni n.ianiad  ?) Sibcone Pitber with CSTEpch t.

cihyleneq.ca f en cepo!pner (EPM) m ethdene rie;3 1.nc tc:p.lcer (1 PD:d) uth thc etmtmt, i:;at Tor the inultiandoctoi centrol cabic the fin:1 choice wn and rwnter nestet jnLet of p4 chicroritne (N) or 1) XLPE, as for thy sinCes, and everall XLPE jachet.

dJwmuf f m.c 1 ro!p thy lere (CSPF).

2) Sicone I'cLber insu!aSca, t.s fo th: Oghs, with a chss (c) SLrte conda lc.rs, flmt retarJ nt, heat :nd moisture buid and and ovMljui t i of UPE.

resi t.in t, tr.cth> 1 t enylainyl h I ne, radh.t on i aevs: cat s'li-cone rubba (S) with a ibn.e n! cdnt. frat and m%ture SpetiEcaticns for Signal and kanoemtple Estt n' den Wires reshtant cNormt:Featcd ro!)ethy! nc (CSPE)juket er a sihten' resin impermted Ifass braid sket. This finup inctMed mmon%ctors far use inside and out:ide the contdament bui!anf,. for tencral application and for CI ss 1 The cable desirnated a'. Chss I for insullaiion inde the con- s :r vice.

taiaraent teudJcq wn requried to withstar,d for f:ve hotas the fo' law.

g int enviromocntal cenStions. 4.5 x 10 Pads, ISVC 60 !bflin2 aad 103l: h t.m hn ty. Tiiimirements were similar to thosc for the controf cable except fo: the folioning:

The common nquhane..ts were:

Sigul v, ire snakeup consisting of.

1) Insuhtion resistance, ae and dc schap tests perforrad 1) Two, three, or four twistH insu!ated conductors within a with the cables iersed in watcr. Dese tests acquired for common conducthe s' dell, with drain wire and an overt!1 10% of the prodection. jacket.

2) Vertical fire test a p:csict. ly describcd in th* r.ection of I're testing. 2) Two twisted insulated conductors, nc,nshielded, and an overa!! jacke t, la addition the fo!!owing design tests were required for cach dif ferent construction: Dermocouple extersion wire makeup consistir g of two iasu-N ted conductors within a common conductrie s!Jc!J with drain wire

1) limimut Tr2y Tbme test. '

21 4Cui, .  ! Ib a tat. W final chc N m h Twor of XLI E. :m ' vm a for the M control ca? , with M.: e sct rNo f Mr the C (m nNes hd a t ! ns

3) A Ilydrogen Ch,c.nde . U.neration test.

.

bra;d mer the sing!cs end a siban; jach t oveau. (*

4 t

I t

i 4

,-- w . m n n . -

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• OUTSIDE eft 3iDr C D'; U ' '

• y r:TT-C % Tt.!!# !isi A ;.T c 1J i T E l.t r. *,0 *C l

,

. . . , . _ , .I 1CStED 15$1L0 CM;LES CL AM MO TYPE , [_OCAg M I:Y CC:h/2 f17 5 V 2- L --- 2 -- 2 -- PG?E OTHLR5 t'3:;- t,h'l -

. , , , , ,

• '

CL/.5* 7 CLA50 I Ib * ~

M.D, 3 pg, E Pn. t/1) c,7 - - - -

C FC  ;,gg,q 7,g;g L!FSLE com ,

--

S k V. 0, its ( 2 ) P. , c u " pr w ec%tr EPR-fSI C-T C-T - - - -

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S i t'0L E CC TO.

.

m , L O C /.

EPH-CEK C-T C-T - - - C-T f,F W,I d

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er c T.: (d ccpti!W u, i.i _ . . . . _ __ _ _ _ . _ _ . _ _

$ LOW VOLTAC'" H, LOCA cs XLPE C-T C- T - - -

C-r E, F ,

_ _ _ _, ,,'# em EdC4C*C gi

,. f.ac o . e- C o. . 3.

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_ _ _ . _ _ _ _ _ . . _ . _ . . . _ _ _ ____ _ __j IN D 5 - C Sii. - - C C - -

E. F t.O C n.

2EC L. V. f t.iJ  ?!

2) t HT, LC C /, A Test c.ufa c.cd CO'cLtH CALu. P(A-CEPL - -

C C - - F , I '- g, g e.,c;~, m Sili3LE Con (C.' P 2ij - M o 17 0 m ', d s.u e na se

.

.

'd EPR-CSi'E C-T - - - -

T E, F L O C /,

p r.0? CONTICL SHC rie cle coridectnrs f cctcy 8 '- Slf;GLL COND. ItQ c a s t r.il ' c ( ud e qui.oped 3 Ed XLPE C -T - - - -

T C, F LCCA ut,;. ce;.rc c tc %

On FPEC tJ e _ _ . _

m ui R OD r o st'lO N t//f.-ceadacter wi n EPR-CSpr i t,. D

. I flC l Ct. TOR ,

- - - - -

T F gpg c o r.n c e t e r s Scior y a f/.U L T I- C D.;D. inste!!cd .

1 *:D XLPE C-T C-T ~ - -

C-T E, F LCCA (G/

LOW VOL1 ACE SINCLE CC'O.

LPdC

\t:C d S -CL'E - -

C C - -

E, F LOCA

': S PEC e _ _ ___ _

z 8 XLFE C-T C-T - - --

C-T E, F ,.l y D LOW VOLT ACE -'I EC

- . _ _ .

IAULTI - CO';D IND h)

S-O-CtFC - -

C C - -

F LOCA (3) Gross LaiJ

_

SMC __

IND XLP'E C-T C-T - - -

C-T F ST EC 6 L . V. StGNAL _.

f_ t,u D b) IND o on 3;nitor cetie e S-B-S - -

C C - - -

LOC /* C GIU55 L'"Id g TIC RLQCOUPLE SPEC ia E XT E NS ION

> 4 IND (4) I'cty cr ylen e a PA) - -

C C C C-T -

LOCA oc r o f e d P ' O *C

--

t- - -

O CC AX il.L t.f 2D IND

-- C4 C -T C - -

C4 -

TRIAXtAL j _ _ _ _ . _ _

SPEC LEGEND:

C -T Cotto insto!!cd in coidult er Ircy. IND Ccut tctred per Inis!ry sty.dsrds, witr essed by P.G.a E.

CSPL- Chicrosulfonated Pclyethyleno, ks r e s.

tOCA Dequired to pcrform oise during cnd o'ter o Less of E Cotte successfatty testod h twirmentol chember,

.

co3,3n, f, c; gen,. fiso cette or corep:,nen+ successfelly (tempp ratur e, pressur e, ..wmidity). tested for LOCA.

EPR Ethyler.e l'ropytene Rubber, rof ed 90 *C. R Cotte c.r component successfully tasted for rodletion F Cotile succe ssfu!ly fire-tested, re g istcr.cs.

HT Rcquired ta perform et temperature Ligher then 50 *C. SPEC Cie fosted per P G. G E. Co. Specificction, witnessed td:e cette :v: cess'st!y tested at hi;her temperetare. ty P. G.& E. lu pec tors.

S E' ne P.t!.er (Mohy:-rt eq:-Viny bm) ,q.fr $ 130 % XLPE Crcar,-link e 3 Pf,e th,lme, rof ed E 3 'C.

Types of coue, use, insf oliJflon, s ervice and tests Tob!c 1 5

- x w v ~r m , n ,., _ _ _

=

o i

!!et.~.r.e of d: livery p-c5! ras for part of the s!!!:cae cal fe a ri w (.:cupy the un: 11av.

product vw,12 Ken under co.n&ra!ien. Des:r I?sts wbnutted by {

• th- r.mmfactur:r in6catut i::t this prehtt, Pe!y ryknc, cov!d i;i t 2) D. nu.f ab.oo of the reb-r c' e.irnultaneously loaded ,

fact incet o . exceed the uguirerntnti presidy 5 t for the ;ilicone. rneaum vo!!ar or W so rc pour dic@ s W ta N s:me iry Ec N1 t yh n: U.ukden and jaclet (c trucdon wn aho

-

prepa n. f.;r Lemccm.;ri; estenden wir: at.y:d r.nr the zum 3) Limitatica of th: rm m, nn fT, with (M tott! u!cu!Ad O seret viu re t.n reutor. and i:4dbtmn ni3t renh e Yh*r level ubh. a:ea of the cro2s section:l tres of \.

th:m obi ot Wum iqM: the cvntinment The dec& Uten pr: th0 tizy cndnot40,3tofcr emed 3r.E,Lm...

t.s. cenL ~

vnted ;r.M : e w In md tem v cre comincing enctgh to show tLt 4) Physi:al seprntion cf recev 2ys centar.ir.g rehnd::nt th conunct;or, was mechanacMy sugrior to the h4h tunpeuture circuits by using eparate r;. nays nad separate soutes.

cati: c : r.si!y specified by the reactor supphci.

5) Mir.inun utual k esraticn betwcca trays w.tainhs Couial Nd 1du!21 Cables power circuit to L: n at !as than 't0.5 cm.

Re3e cam:s were purchW frorn the upp!kr cf the XLit 6) Lirni::tica of the uw of Od Lcttom tiays and so5d cover contrei nd pawer c:.Ma The itquireo,:nts v cre for XLW in<ul.e to c>nly v. hen na power cab!cs are invo ved.

tion and fiarne retardant ALPJ jacket. T.lcctncal ch:trxtenstics ar.d ,

to th 7) Current c:Tryiny cardty of cab!:s to be c:Jeutted by dimensinas sorne ieit:Le yerefersimibr

!m: ,fn u.u:,applicatie mdustry itn.dm.s uth

.

ITG A cr NEC rth:

Conunen Pequirenwnts for the Accept nce cf Caws S) Interruption of trays ti v a!I per.etratic, rnd t se cf con-crctc cached, " pre ecti.;n, metal duct. far a total cross Due to the naturc cf t!.c project the foDowinc icquirements section2l ar a at :ry;t eaaal!c that cf the tiaya, wcre ntablined for aii the cab!ct desi,nateJ for Cie ;I senia:

9) Use of TJe sicp: in M1 urtic:1 and hor:icat'.! trays. padic-

1) Qualificaticn of supphcr. ulnly at nli and De pen:trat:oas.

2) Impfernentation of Qaality Amurance ftn with docu. 10) Use cf the cc'or coding cf::l tn cst:ci f ar C!c:si service, n.cntation extended to fun tracubility of ru2teri,Is. foi 1N (ffs.nt and cNr ciurimiutm of radund ni dial

.

a) Cunrh: .:: vce. h spnif.ica t:on.

.

.

circ @ as weil as d.fie:ent ch2nr.ch. Ecr tu p.:mose z!i the c b!n were pt.rsaed in nine diffe:cnt colors:

4) Ev!Jetcc of tut ptrforaonce:

(a) Bla h for the tera ral use,non Class I ccN:s (a) Perforrnd bv eppliers end wit ested by Compnny reg rewr.tatids. N Orarse, G ey and Purple for the three Saferurd Systems.

(b) Perfo:med b , independent 1:borataries.

(c) Red, White, Blue nd Ye.dow for the different (c) Teif anned by Company. Protection System chmne's.

T61c I dves an overa!! rirtme of types cf c2%!, when used. (d) Eiown and Gacea for Piv ection Sy.uors trair.s "A" imw in:toiad,(!m of senice and tests pufom.ed. sr.d "B" cutputs acts. tion circuits.

RACIMAYS Re co!c:ing of the sir.rtes b th: mutticonductor cable matthe3 that cf the jacket. In sddition all sit;es were nuntned for he cdteda for the instaLtion of c:Lks ia trays and conduits ide ntification, L.we bem citab!hhed since c.uly 1968 and they a : stillin Ike with n the pre .cn! st:tc of the art.  !

l' ire Ftops - /

ne spacial instructions to the Nucietr Pow:r Pin:t 6s:gn The use of fire stops was recommn&d for th: fo::awinp, yetp had paticubt reference to the fe,Ilo.ving: PcPosts:

1) Definitiou r,f the caterories of cables wi'h different ve!!ve (a) To Trovih a seal impenious to fire et wall and f:cer sating or difiennt service that wouu r.ot be allowed to PtnetrationL n,

f Y- 0 c 4___ 3 *- O'._

to.0 M m) s . . ._ f:CQ 02&n g

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T-0" J C ' N "I DJ W "3 l

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.

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- ,j. f-k C" Fi e Step

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.

b C" rire Stop ) .' o

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DM.22

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UE

.2 I O C* .23 .24 0

g l 16 IS' 1

SFCTION A-A SLCTON C-C 11

/H 13 ,6 I

hr SECTION 6-0 SECTlCN D-D ltems t to 20 Trermecodes testc!!cd in condoctor twadras tiercs 21 to 24 Thermecm r:e. omic.rie.g tre omMent tempercture M

k I

.

Figure 5 e 6

ww,  ; -

. ,

, (b) To se,i c&duits and trays entering equiprnent enclosures.

g, (c) To amy 11 e chimney effect in vertical trays and prevent Tm fue m intion in horizonfel irrys. cumQ$c lNIJ"#'y"I"'58@5*yt;/,p TC e8 Cd

_q_-- l_f.2% _".,o

-

3"0.-J. % &

TC85 2m M E W  %

Four leadin; products wcrq investir ted with ret art' to. coe of  %

appbcatio.e, culing inne and shnakare, residual f!cxibihty :.frcr cure and flame reshtance.

- - - -

] ~~ ~

>

TC'6

[a

' h \TC C Tests were perfor r.ed on different compounds and inert ruler.

The product scheted was a thiwtropic compound used ia conjunc-u ( i2 TC.' 8 5 s \ 7g c,7 tion with fditt m3J: of asbestos fiber (later sabst2tuted with a D T c.65 8:2 cermi wmalt 5 he interim Dre stop for vertical trays cemisted of : 10.2 cm

$. 70

-

$', p

,

"

ic ci, TM6 F

thick barrier of fibers saturated witi the compound. He exterior C" poition of the fire stop consisted of 1.27 cm asbestweenent pariel TC+85 fastened in a ff ac pcrpcndicular to the tray and exter&g for a R TC h7 g

rninimum of 20A cm al! around it. pic;totypts of this Are stop were toted in trays lo&d with ILmmable cables. The fire stop pased th-e C %2 testa and was apprustd for installat i on. 8 00 o

-

_ E g M/ /l EsNmeted Several hcat run tests were aho r:rformcd to d:f:rmine the + Tett m 1 40*Cre ,T0t. '

amaunt r.f ten.p-rature rise due to the fire steps and the v, ire L Tcst in 2. <0 *C M ,00A coatm;. De results were tabulated a7d used in determining the cab!c e

.T, e dera ting. k

$o .

. .

Durir.g the hst few years some new prodvets became cvrjbble t .

and wcre offertd as fire stops. Their instdhtion scemed enier and A-A U-b 04 D- D intcr than the fire stops already approve 11he new products were f'@r' THr.RMDCOUPLE t.OCATION

'

s cvahiated and rcunt!y one of them was selected for insta!!ation at .

the D:ablo Canyon Nud<ar Power Project. ihmem ter;;crafse acased in cWe landles FueC Ris product is a sihcone compouni foamed in pbce and inetsiled in 15.2 cm thickness. A crnh prcpam was docbred for the lating of the temperature rise in the cable with the new fire POWER CAllLE CONNECTORS stops. The tests were peiformed on a 30.5 cm troy laaned with fifty 2

, #2/0 AWG (67 A n m ) Ivw volta;c po,ect cadetm, I.r0, insu- S2mples of cnn:p type copper power cennectors for wir- ses y bied with a CSPE jacitt. T1.e tray was mNnted inside a chamber at

{O c onstaat, controikd, te mperat u3 e. used at Diablo Canyon vare type testut for heat risc,irillivo!t drco an3 ; chott ferce. Dmh iD% and 12% of foil rated currcr.t. based ori Tab:e 310.12 of tL: 1971 National Flectric Code, were circulated He tests perform-d were as follows through the terminanons conshting cf the cab!: and crimped on connector. The temperature rise of the connoton was rNays less

1) 40*C ambient w;th a current of 70 A circulating in exh than that of the cable. Vo! tare drop measerements were obtained in conductor. milhvohs over a distance from the junction of the ten;ue and the barrcl to approximatdy 1.5 mm on the wir ' le all cres vo' tare drep

2) 40 C ambient and 80 A. values meamrcd on the crimp were less thu tht measured oser an equallength of wire. A" tamp:es were snNected to a crimp strength

3) 50'C ambient and 70 A. test. Fach sampic was placed in a Richle Tensi!: Test Machine and sufficient fcrce was appl!cd to pull the termination to destructfon.

4) 50'C ambient and SO A. A'l samphs passed the minimum requirements of Underwriter Laboratories Standard UL4S6.

The tray with the fire stops, conductor arrangement and thcrrr?

coupk lagtson is show n m Fgure 5. The results are represented n SELECTION AND TESTING OF I gute 6.1 or simph:ity the curves were plotted using the maximu n SEISMIC SUPPORTS FOR RALEWAYS temperatue recorded, with the corre ponding Ihcirnocouple identified for cach value. Seismic design crite-ia for the supporting structure of the cable tray and conduit system ccasisted of ficor acceleration response The data in Table No. 2 show all the temperatures ccorded spectra provided by a seismic design constitant.13ased on a design for all 20 thermocouples installed in the cable bundles s'iown carthquake with maximum horizontal acceleration of 4Mg and amb]ent,in 1igure 5. Aho shown is the tom! temperature siscvertical over the a:xkration of 279g, the supports were desiped to provide a system with high natural frequencies, to t Le the predicted maxi-mum floer accelerat ons with."t local mpliGcation. The greatest Reimecouples No. 2! to No. 21 were used to ruor,itor the value of floor acceleration used in the design was 1652g for ultimate ambient temperature for the teos. For t oth the 40oC r.nd 500C  ! cad conditions (co respondiis to DDE or SSE design).

ambient, the approximation of the temperature was v ithin one per cen t. De flexible support concept, which supposedly isolates the supported raceways from movements of the structure, was rejected for the followin:; reasens:

It is recognini that the number of conductors and the simul-tancom cunent lading used for this tat ser csents a situation (a) Dispb eraents would be ex ces .is c if flexibbty were rather unbhe!y to ocar in my phnt. liowner the t undic arrange- achieved.

] mer.!s are quite a re.mmon practac, and da intent was to test a case hmit. Needless to say none of the trays at the Diablo Canyon Projcct approaches such an extreme limit. (b) Complexity of byout raceways made it essentially a rigid system.

7

M:1

• d Lj

.

3 IN

!I f TEST NO.1 A TEST NO.18 TEST NO.1A TEST NO. 2 TEST NO. 3 TEST NO. 4

• :j THERMO. THERMO. 70A A M B. = 40*C 70A AM D. = 40"C

.

& 30A Af/3.=43"C 70A A M B.= 5 C'C 80A AMB.= 50'C COUPLE COL'PLE TEST NO.18

!il LOCATION N O. TEMP. TOT. TEMP. YEMP. TOT. TEMP. AVERAGE TEMP. TOT. TE MP. TEMP. TOT. TEMP. TEMP.

-

TOT. T E M?

lll *C RISE *C 'C RISE *C TFYP RISE C 'C R;SE 'C 'O RISE 'C "C RISE 'C I - 1 G3.2 23.2 G3.2 23.2 23.2 70.2 30.2 74.7 24.7 00.1 30.1

? N 2 64.0 24.0 64.0 74.0 24.0 71.2 31.2 C0.9 10.9 79.2 29.2 ECT. b 3 61.1 21.1 61.3 21.3 21.2 63.0 25.0 l 72.4 22.4 77.1 27.1 A.A $

4 63.1

9l

!'

i.

tr 23.1 63.5 23.5 23.3 03.9 l 29.9 74.7 24.7 79.9 l bJ.9

a C 5 64.8 24.8 '

G5.0 25.0 24.9 72.2 32.2 l l 76.3 I 20.9 82.9  ! 32.9 '

N 6 C8.8 28.8 09.0 23.0 l 28.9 75.0 33.8 I l 20.1 06.8 30.3

,, 6 l _8__0.1

- l ,

41; z 7 G1.5 21 5 61.3 21.3 I 21.4 68.3 28.3 72.3

_.

e., l _ _ _ _ _

22.3 77.6 4 27.G

' O 8 67.4 27.4 67.8 27.8 27.6

!~.

p; D-D G 9

l 70.7

-l 2G.7 79.3 29.3 85.7 35.7 tu 67.8 27 8 63.0 28.0 27.9 75.3 33.3 79.2 2?.2 85.3

..t E 35.8 a u. 10 65.0

9 25.0 ,

G5.0 25.0 23.0 7 ' .9 31.9 76.2 2E.2 S2.0 3 ?.0

.j oo 11 54.8 14.8 55.2 15.2 l 13.0 l 61.8 21.8 65.0 15 G C3.7 18.7 N 12 ) 60.8 20.8 60,8 1 20.8 10.8 27.9 d SECT' l l G 7.9 l 72.1 i 22.1 l 7G.3 l . . .f 20.3

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• 13 54.1 14.1 54.9 14.9 14.5 SP.4 18.4 G5.3 15.3

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., 15 54.4 14.4 54.8 14.0 14.G C 1.9 21.0 C 3.0 16.0 60.0 10.0

% 16 54.8 14.8 SG.6 16.G 15.7 02.2 22.2

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19 56.6 10.6 57.4 17.4 17.0 CO.7 20.7 03.3 71.1 i

1 G.3 21.4 20 57.1 17.1' 57.7 17.7 17.4 61.4 21.4 G9.1 19.1 72.2 22.2 4

Nates

1) Art temperatures are measured at s*=edy sta:e.

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' 2) Tes No.1A and No. IB ere mado et different t' mas t? vsrify the repentab:!;ty of to tvst.

3) The aversa tempersture rlw is used to pfot the curve of t-st N3.1 Le figt:re S.

4) The heavy %es identify the mewlmum values used in figure 6.

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Adj tab!c n'.etal frauing elements were used v components of tmount of data which would be imponible to punt la this paper.

, the supt u I ancrubbes, so that on-the job fabrication could be done The fire and the environmental tests combined with the design with minirn 1 dnkg of hoies. lloweser some velding was required criteria ruided the desiener in the selection of cables for the Piablo in the assembl:es and hot-ro!!cd steel angles were used for some of Canyon Unit. De tests on fire stops gave valuable information on

,

the braciag members. the temperature rise of the cables. Bis information was then used

-m for the selection of conductor sizes.

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EmbedJed sheet metal channeis and expansion 2.nchors were the chief means of atta:hment to ceilings and walh. An engineering De standard d: tails for raceway support were developed to standard was deselored for the anchors based on resiew of published include special de<igns that would comply with sei:mic and quality test data, published allowable loads, and some in-h:nse testing (static sssurance requirements, and dynamic).

It is the cunviction of the designers that the cable and raceway Support assemthes were designed for either (a) vertical-and- system at Diablo Canyon represents the best possible combination of transve rse loadmg or (b) longitudmal loading. Omni-directional material choice, engivering judgment, economic eva!uation and supports were utihred as much as possibic. desia;n criteria available .oday.

Open-sided trays on single-stcm cantilevers were designed to be FUTURE DEVELOPMENTS used whenever pessible in order to provide easy ac:ess for Lft ;n placement of cables. Due to the complexity of layout of the tray The criteria established for Diablo Canyon could be used as a syvem, the open sides were in many cases hemrned in by walls and Fuide for other power plants, nucicar and conventional.

adjacent and intersecting trays so that pulling of cables was the tech-nique actually used. Because the cantilever assembly is inherently De amount of information premnted in this pos ^r has been v caker in the transserse direction, it probably would have been 1;mited by the space only. More data are already in o .r files and better to standardize on multiple-stem " trapeze" support assembhes more will be collected as the effoct to achieve an even s,fcr installa-instead of cantdevers. tion continues. IIcat run and fire teds of cables in raceways and fire stops are being pcrformed while this parer is being written.

Standard details were deseloped with the intention of mini-mizing the struct.ual design effort.Ilowever,due to stringent enforce- ACKNOWLEDGMENTS ment of quahty assurance rules, oser five hundred spacird designs had to be made to supplement the two dozen " standard" assemb!ies The Author wishes to acknowledge the cooperation of his which constituted ti.e bulk of the .upport system. associates throughout the company and the contributions of the personnci cf the D:partment of Engineering Research, who were CONCLUSIONS responsible for the testir.g. Further I gratefally acknowkdse the con-tributica of Mr. O.W. Steinhardt of the Cwillingineering Deputment De Author believes that this paper demonstrates the determina- for the section on seismic supports.

tion of PGandE Company to design a plant that wou!d minimize a;i the risks of accidents where cables could be involved. His paper a!so REFERENCES shows that the calle is not a commodity which can be purchase / in millions of rneters using only one specification De variety of quire- (1) IPCEA S-19-El, NEMA WC 3-1964, Rubber-Insulated Wire ments in a nucIcar power plant demands particular consideration of and Cable for the Transmission and Distr;bution of Electric

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materiah as well as design. Energy - Part 6.

After reviewing the : tate of the art in fire testing, new tests (2) AElC No. 5, Specification for Polyethylene and Cross-Linked were deseloped. De selrction of cable listed in Table I represcnts Pobethyleae Insulated Shielded Power Cables Rated 2,001-the final tr>ults obtained from the evaluation of an impressive 35,000 volts,3rd Edition.

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A!thoonh the, cables core not e:<pesed te nr e radiation be fore there lenta

\N rt ' ThlO , f. h I?3 (:e T i d l ! b U e d b 8 Vi . 'n C,Ua1Ii.iOd in Other PartTs, CHd i 3 t i(>n In i : tahCP O l' I.he in o r[, '.iC  ! :n te r i a l .( (E W SI O.7, plPSE) in ClO iD nula t i .m if huch boyc.nd thnt needed 'or this cable nnd, the re f o e , need not: Le c on si.de red here . 3 Tho organic inaterialn usei in the c Alc are p c.1 : I u i.d e and cbloronalphoanted polyethf) ne, tuo hip,h quclity plantic compouri, very cultn51 for electrical insulation of cabler used in severe enviroamrts.

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Pu.2 vitiate tag was oc j acte d for tha insul a ticn .t<caure of. 2 t: cxec12cnt pin'ical, ch. Lesl, m r.1 elecicical rop.rrie,, nr u 11 as in on t s tudi n g r< ri r. ta nc e to ele , :tc6 ft me rr.tu rn s , g,r> , rndiction .ad fi m . 'i nu : ',Jacturer (Ihn'not) of th ! " n t e r i c;) hc_ detero'. A it i 'll u.ithstand not thau 10'p'c or g t; . ': rm! Ic ! i ',

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2 Ec *an Inn 17. t . .d 1,'i. ro m! C:m'" Cc: m Te :: t C.: p e r t URl, dc Lt d hovw rL, 1970 Tert Report U921, datcJ Um 25, 1972 3

nan elle Pecifie EnrH e r "> .

T.a h n ra t o r i e r, Final Repor" 212 110-1 M8, dated July 1973 to 1;ostoc Inculated Wire and Cr.ble cotr.pany.

'lh e Cf fr et of Gan < Ihdiation on the Insulatioti1Mnistance of Tcaton Insulated Uite and C.ible Cmp:.ay's Single and Two Ccn%ctor Insula ted Uire .

4 Fra nt: 1 i n Irm t i t u.' Re searc'h T.ahora tori c ,

Final Report F-C3Ol6, dcted June 1971, for Roaa Cable Division of Cyprun Minec Corp.,

Quali fication Tentn of Electrical Cable.

Under siinulat ed Reactor Cont ai: ,uent Service Corditiens .

Final Peport F-C3793, d<. Led tiarch 1974, for Cerro Wire and Cable company.

QualificMien of Class IE Electric Cchles for Nuclear Power Generating Stations far 1EEE MM.

Final ": port F-C3033, dated April 1971, for Anaconda Uire and Cable Cv;2.;mn.,

Test: of Zlectrical Cabler. Under Siwulated P 'ctor Containi:iant Service Ce:. litionn.