ML20149J492

Part 21 Rept Re Potential Problem W/Type 999 Unit Emergency Power Generator.Field Breaker Tripped at Facility During Test on EMD20-645E4 - Type 999 Unit.Appears That 100 Amp Is Too Low Rating & Should Be 125 Amp

ML20149J492
Person / Time
Site:	Browns Ferry
Issue date:	02/05/1988
From:	Kulchak R MORRISON-KNUDSEN CO., INC.
To:	Taylor J NRC
References
REF-PT21-88, REF-PT21-88-009-000 PT21-88-009-000, PT21-88-9, NUDOCS 8802230083
Download: ML20149J492 (7)

Text

{{#Wiki_filter:. _ _. 3 CONTRACTORS ENG!NEERS r DEVELOPERS ] MORRISON KNUDSEN COMPANY,INC. [ np- .V + UCP A2% \\' h ? s' .') / I 4 PO 802 78Ce BOtsE CAeO U S A 83729 PHCe4 (?c86 386 K00.fELEX. M403 e' ,/ i l i a February 5, 1988 Serial #10CFR21-88-1 TO-3Ii s i i l 1 Mr. Janes Taylor US?iC l i 1717 H Street Washington, D.C. 20555

Subject:

Potential 10CFR21 Finding - Testing of EAD20-635E4 j Type 999 Uil t Gncrgency Power Cenerator

Dear Sir:

i j i We have been advised by our Pawr Systans Divisico in Rocky Mouit', North [ Carolina of a potential probim) with the above subject Type 999 Unit vdilch 1 3 is in nuclear service (correspondence attached). J j Please accept ny apologies for the delay in tranm11tting this potential l finding. We will fonwrd additional infonmtion as it becmes available, f 1 Very truly yours, AAO4A.- j R. D. Kulchak l l Director Quality Assurance { l F0K/gs l Attach. i cc: H. Falter V. Mitchell l Flie f[Ai I 8802230003 990205 l l gon Aoock0 9 M9 i M l i f

1 serial no. -o-o045 i MORRISON-KNUDSEN COMPANY, INC. gECE/ yED INTER. OFFICE CORRESPONDENCE k j January 26, 988 NCE oats-Pcn Kulchak (Quality-Boise) yo. Vann Mitchell, Ken Irwis and IIarry W. Falter nou Ibn Galeazzi (Ibcky Mount) tocatiow ' oc ' 7 ' o N Rocky Mount,?C i susa c7 Bruwns Ferry - Possible 10CFR21 Call 1/25/88 - Mr. Ed Freman - 205-729-3363 j l I j 1. Browns Ferry were conducting a test on the DD20-645E4 - Type 999 unit. They were carrying a 2950 KW @ 80 PF khen the field breaker tripped. l ) 2. Freman reported that they had m2asured 96 tcp at the circuit breaker and 112 Anp in the field. l I 3. Attached is a copy of the schantic which shows a 100A j circuit breaker. Freman identified the circuit breaker as j a G.E. Type TED136100. The schmutic is frcm an DD drawing i and the 100A is DD's notation, j a 4. The DD Characteristic Curves show that the generator field requires 100 Anps at 2600 KW and 80% PF. 5. It would appear that 100 Anp is too low a rating and should j i be 125 Amp, but this wcr. tid require a larger frame size circuit brerAer for wc.*ch there would not be enough recm in the cabinet, j 6. I have asked DD to check into this matter. I do not know ] why the Amps at the breaker should be less than the tcps at e the field. As I see it, all the field Aq:s can frcm the ) EPr and PCr transforners. 1 3 % (J _

1. ~

= I liarry W. Falter I IT7:jb Attac}Taants (5) { l = i t i I i ) i l i i j sans f 1 L

' f. ' Y i ~ MOLDED. CASE ORNii BREAKERS Publications and Dimensicns (4. 4. 5 i A Time. current Curves, Outline Drawings -i - 4 4 E - - - _. PUBLICATIONS Time. current Curves Descriptive Bulletins c Es cur u s ruay alu t-onNntrrmn o<neral Eintric Company, AS SP Dist ributi"n S< ryk es. IIMg. f t 70 5, Cor. Ordt r puthtiera fintn lmeal Ge n ini n.h s tric S.ilt s Ofh.ce or por at i..ns Par k, Sc..th, N. 's,. 113n1. C,.irc mt I, ret t c t iv e Dm,ct s t h *urt ment. I,l dn silie. Conn.

Mn62,

,m,.,

,3.,,,,,,,,,,,, e....., 1 r. o.. e - s,... , n. i 5,. l % o.. s...,. 1 Q l.ine 13reakers avel Ao rcotit s . G F. A M l!41 F. IN 1.me M<ldM cnic Cornnt s treakers GM A 7 in.1 F 2 25 Line M< dded rav Ctrcuit fir e.al rr s O E A 7 801 $lllll*.'OO$$ l $ h,,. j f/50,ttle M 1 led case Cirrmt Ih t Ite f t G E A 7 4 5 1 t af 10 9 l 'C 115 S3 a.wt 8715 610 O s l '3'588i K 12% 1.n.c M. % d < me C a a mt Ih t a k e r s GEA 7 4no f i ^ t L ' 2 8. ' M l6^ ' " A -r l eJt$ e 1si C f 5 61's a S J WO M t l le lL or Cl( "I It j b r, k er g G h. A 7 4 79 ], $ g,, f g j , p 3 p{ g, ;,. g g Cll3 ' Cur r e tit linisi n g C u t uit Ih rakt # 3 GE4 74% I IN If tP, TNil St k 41 N S 8 Jil ). l 8715 O ! T )< l H Hf' A K

• Fu.ed C rf ruit Itr.a k e r GMA 7477 I I N i f l e. f Hf '. A -6 Ne l

's t i A l H e T DF S d t s II..o I!. s For rit < nit if r oik ri., f)M W ' 'M '."/j,"i"I I 3 r. .c ,. n.ii., ma )M R l o... n,,i t S a io L e G F A 7 419 e +2

• i ei...i oi s.i t s at t es-.

, jjl,y jg',,,, ];( ll.Jj, a jll llj M l.'dtMV Ci's bit Ilf reik t i s, A< < e.o,r ie s aro l Fin i sur r e. IS 1490 Ainlwret (il' T 2 7 79 j g,3 g i g ag y,,,, yggg,gy ,y g g gg 4 6.o l l i r to tw e i t.t % 6114 8 8 J il.9C k 17 m t ).i e. I,' '...1 t.lial it t f i) 7'a Outline Drawin.3> s"oe-c ... a 5 o"* 2" 'a i ma m. r. i ve > 6iis 15.,.2 i s e, ih r,.,t 6, i i, I , re e..... i o.... .o.., n ... i e, _. l e...-. c..., o i .,,i r x

m. m.,

. m... j o, x, t...

DU;i

....,a o m.. ....,x e 3 :.,. I i,..i.. 5no c.m > i.. i.o e

7. s u.

e.a 3 I i m i.. e. m3 14.., o. 1. i .nci.. , m t.. .3-

.i sc i.3 ilt 10.

56cl.6 DIMENSIONS (for Estimating Only) i-......,i.. l F 4.s c, l lc j 9 l ( o <.. j I i a r. j i I l __ i! i l... oix l j ,w.~. i i r, j 2 "u vm v :.. t o t. t ii r ei 3

c.. r 2.

l 1 r,, I i l 8 l l 'l2 i; 1 s '. ; "u(3%. l i l l tste m ex im f*aI _, i' l' e,; l 'I ., j3 l l j 6 lP. I t'. s ':. ; e,. i a i. o nes r , i <.1 'x> i 4*. j 2'. i i ,'iij~ f" I. ) ) l I t .l gi j 1 i 1 I j i l e ico I i e i. {. I. e i 3 l l ' i. ' 2 ".. I _ I l 2'. 4'. l'. ,.in L i - or tose l. f ".. 2 E f2 '. l l I n} <4 l to. l 1s. lsi l s '.,n'. v.. j i t. s. it; te. ius j J. 3 4 /, L t Sg ' t / J6M , 9 'e

10 s l.,5.

,i 3 ' '. [< l ' '. g i I i. ! I' e C i rc il in. u l Illi I). ( t.m.'. l L I, tun.I v. '/ TED <!ni.:n i T ED am! Tl!EDi rrt e s existing TE F,TEF..rn! TilEF i l New %gd. type bn..Lt rs. As at L s of T El. t > pt t a e a k e r s.o r..h ph t t l. ui.h i s w ill t < h!k.1 h g Q, A autonuth ally u.htit atig t! c in w ih wn. U/L LISTED INTT.RRUPilNG R ATINGS 'Y O,h (N ,4 iter Ic tena;i s...d en NEu A feie re.iedveen-see res. 31 1 I ? 2 w,.. .., w,.. ..>u,, v .l, u ~)-i W-f s,. 3,. i,. +.,' M t y c, . o v o v3.., - i... >. 3-i.~ l o4 i l .Av i s I 'a... i i e n). to w I. a) ! i 5.tM t. 0<o Il 000 l * 9 l *\\ * ' '. ' l l l n o s...i. w..., ,,,y, i l o s.a , r i :a l n c >; I % ) i o- ..o t o. c.3.. LUG WIRE SIZES PRICES f TYPE TED 3 pole 480 and 600 Volts A.c (includes loac' lugs only, add WL b.. for line lugs) cro.P ers) no t a' ',' o ix c. e u-> e i i c " "a 'c'"2 L.~.. n3 1 v.u.. o...., nn. ,,'yt;, gt,, .o, . x u..... a..... i i t.or it o n.nal tuci. ~ pu, s. o non.ou itb 13 c o no o non.<co 23 1 14313.C20 l ttD 13 v C2) n.> o.02) noo.en ENCLOSURES ONLY n i non.oa no n; o cn n r non.cn in oo oc o co <cn l

n i no o. en i i oo (includes Neutral) c,o.rorsi i o co n

n n. n o n. c.o l 88 3 t

o nuo.co f f 013. C. $

5 f t ') 13 f tD 115 v 0 9 16013 0 5 q 3 f tD 1) 30 no o. CSS nD u. 0 5) no os, C 33 itD 13 v ,L..e S'-*

o co j

co c..e,.. j c.,.. I o ^' ao n. i 73, no o C73 I t 0 13. f tC 13 C'O f rD 13 d C13 tea o., m 3 0, oo l s en i,3 eo no o m 110 13 ' 1

• ?*

62 j 90 noo.Go Ita 13.y C e ) c.1,v, um. i su oo e.* 6, g., i im no 3 uc o u.a w,.. IN 110 13.' I N i $?l 64 f tD l).V b) ' l 1.D 13. v T I N 3 $ 9 0 00 ~i.., .,.c,..> i (.......e.. I, ! n w a., a nM em r.... c. ~.... e.. 1 t......... e.,.. ,p.n. ,.t. 4 . + >.. -.,u. 4, >...s, s.., e, ,o,

c...

na c..... I i o, t.- m.. n e..... i TYPE THED Hl.BRE AK ' 2. and 3. pole 600 Volts A c (includes ' od lugs C' <,*.' '. 4 j " ' * 3' '8 " or'y, odd WL for line lugs) ~ n.. . 3 a..

..,. o. c.>,.

. r.4..~t... o.. ...........,.4 L.. e... t, o..e... .. m ,T.,,3 e... ,,,, o '~.. 2"' r.o i n r, o. i n

1. .. 3 a....

C,'...IV.. *f3, n'N<5 16? 08 a* I i, m u. : o, i,.o o n. c o on l a n. :. rea o..a -, o o. n im:.n cn

a 1ou 1-i 3 0 m ACCESSORIES AND 3e Tal; 6 m

1117 00 1 t o 13 33 im. o. 413 i.=" o o. 0 31 3137 og la t O 12 0.o f a t O 13. f.o MODIFICATlONS s o 45 1 3 f at ) 12 IH o 13 33 luf>17

• )

Inta 5 ) 4 0 ) M ;.., g.. 2 6.. \\$ 3

s.

• g )

I*l312. ".3 im.D 13 C.')) 73 I"t ) 4 2 8. :1. 9 )

• • tQl' C

1* t D 9 7 s $'8' $ 88 M 5? 1= t b 1 t n g ; g,3. C + '- iM t ~ t ;' 1 )

• g 1, j s.aa.

$N n u t < n. n'. in d logi R E F E R E NCE - E 100. 4 U/L. N E M A 5t. n / a. ..n y b. u.t o r u g w.g r t o,5 - P.n m . I I i.n s n.r.o py, 4 ' E y ov.J 1,c L... m f u. I o

r l TYPICAL CHARACTERISTIC CURVES k i f i I, Allt d Al' .l. { l ,-.l v .l l ~' i , l.!Nij. 33 0 1 i l l-NO).11AI) i j SATUllATION 'I f i i,t t 4 4 i 3 r,' i l l: l l ' i yo {'. 1 4 ! l { l' 3'dulliW l g trau K W [ 4 1 i. i 1.0 l'.P. of I'.r'. 1 t j j 1 -l 1' i t f [ + i l 1 - 1 I I i I" t l' s ) ,-1 , j 1- ) f l l I p See i . + a I l c l l )' i i f i + t i i } w l I e f i i I i t erd i F* 1G O - NH +- t i : i i C w a .i SYNCill(ONOUS i 4 w l-IMPEOANCl, p - do E j l l 'l l ' \\ - l l i Gn ,2 1 c., lau r 1 ( ,k I 1 y t i = 4 i I + re o C-t r = 1 6 l ItNI l:1) I'It ASE CUltl(1<:.VT N [ I l ! t ) j NO 4to h l 6 1 1 l I a r d i l'I { llj an y [ j i-j i i i l - t i d [ l

1. O l

-t w c i { f .I'OTlElt ! i Itoh t . I 6 a L i

• l ill A NG l.F.

i 1

-(

c. i 2 i I' I I..l. Oy f y 19 N 31 40 To 'O 70 f0 %) 10') 110 i t ? Fli:1.D CL'ltitENI'~ AMI'l:lti;S I j i 3 l i i k a l f i A20 SYt;CilR0!;OUS GENERATOR 2600 KW - 60 CYCLE - 900 RPM l 2400 VOLTS PER PilASE i I 4-4 a )

.i \\ 'o ] i SYNCHRONOUS GENERATOR DATA l

a DASE LOAD llATINGS I

i ( l Electro-Motivt Cencrator tiodel A20 A20 A20 6 A20 6 l Cenerator Frequency. Hz (cycles per second) 60 50 60 60 ) j Speed. rpm 900 750 900 900 Rating KW 2600 2200 1609

• 100 I

KVA 3250 2750 2000 2625 l rower Factor. 0.y 0.8 0.f 0.8 j Termi 1 Voltage

3. phase l

• 160 41 t>0 vye

] Delta 2400 2400 480 600 j Efficiency. Rate' KVA and Power factor 97.2 96.5 96.2 96.4 } Armature Current. Amperes j Wye 451 382 j Delta 782 662 2400 252) t'ominal Stator Tetaperature Rise. OC 80 65 100 110 i 0F 176 149 212 230 l [ Reactances Per unit Direct Axis Synchronous, xd 1.66 1.21 1.25 1.04 l 1.00 0.73 0.75 0.63 l ) Quadrature Axis Synchrenous, xq J Direct Axis Transient, xd' O.44 0.27 0.316 0.266 Direct Axis Subtransient, xd" 0.28 d.17 0.217 0.182 7 Negative Sequence, x2 0.22 0.22 0.180 0.148 Zero Sequence, x, 0.11 0.10 l i l Time Constants Seconds 0 75 C (193' F) j Direct Axis Tranalent Open Circuit. Tdo' 4 34 4 34 4*li 4*34 i Direct Axis Subtansient Short Circuit, I " 0.017 0.01E 0.023 0.023 j d 4 l Direct Axis Transient Short Circott, T ' O.654 0.620

• '12 1.02 i

d i Armature Time Constant T,3 0.09 0.09

0. o 4 '+

0.044 l l Short Circuit Ratio

0. 6'4 *

1. ! !

0.83 1.12 l T. I. T. Falanced 14 14 30 30 29 29 [ Fesidual } Regulation at Rated Load. Per Cent 42.8 23.3 43.8 20 l Synchrontaing Coefficient. KW/Raditn 1 Full Load 5770 5910 4 2 '+0 6213 f l Na Losa 32w 37R9 2670 4180 Field Data 0 F.esistance at 75 C (193 F) 1.258

1. 258 1.258 1.258 Excitation at No Loao Rate d Volt s 39.2 55.0 34.0 H.0 l'

Excitation at Full Load Rated V 100 121.5 e 9. 0 7 '. 0 1 Nominal Field Temperature Ris<, OC 65 H5 60.0 90 0F 149 185 1 *+0

1. 9 %

4 i Pounds 18,100 18,109 18,100 18,100 Tetal W ight a Stator 9,000 9,000 4,000 9,000 j j 70ter R 100 8,109 8,100 5,100 1 End it ustrg 4. Bearing 1,090 1,000 1,600 1,000 1 l In mak ie,g applic at iens at this ra:ing, be av.i r e t h it this low short clicvit ratio j has limitativns. l i l i l 1 1 i l .i { 43 1 2.

N \\ 'l / i P I '%..., ' * > = r.,* j .I r, 'y .. {J l J r. j ri. I e

i, h-y

.o j M Q ks' .l. .f. .j. t,._ n., ;,,. r* '..;; = q l tb ua... u,<t.r.f : l7 l } tb I e.

m..p-u,.

L L ' I - _q t. g a.1, 't i s, j' j s jJ 7, " J a ,.[ *p- -.., -. g,,y, . g. n 1 3 1 g i 8 ,d l g

1. p p.?,,

I.

r..<

i -l- -- l.a r;,ep, \\ i o 7 t u., y d t .n w _u u ..! i, >$ y; ri t"' er i "', g o l::,. 4,.. a' [:. l 3 c1 ij 1 I.,(.

• j 'j
• i '-

y' .h.,, p ../ .r. <,,s :s.. i l o., g, I j l ... i !,' s.. 4

, *4 3

A" J. .-,,w,,' g, ,.3 I 8. j t .r 4 i 9._ m,c,'i,' i ',;; U

• j( 'v/

,j l t' J) lt<g . ---,_ f P w,

. m. c

~,,8, i s _

• * [ !.. -

!!. id [' i i; t ' 8 j y s '# -{ - ' '3, 0,' ,q L l I; \\', ~~ "s.- c, 3 8 y

• , i

,';f- , T-.; / 4 in s ll /- q, i = .j jf ,..s. -.. ( 'd g r ay ,% 4% l I

• .g g>

f ', ' s. ( f. p 8 8 (- t. l g{ t 4 s, t yg

• g

, ) g..' ', } u ( . l' I ,f'.' ..e . j ",> '.t J =P s' 29 i l , g. g, i. ...'J,,]~'. p - }, l > s, '-T k a4' '.,n e ,8 4 .\\ 6.s ,6. ' $c ' s > l g., P .i ' '.' ' 7 l - f,f 6, q ' .,,q 4, t, A f,; ? ;. 4 .'4 2, v'(,4, j ]. ' = l; r,,,. = w, i.' f I ' y > ;,, 5 e uL ___ i;. t n. n n i 4 f[ 7,- r.i L.. I* p, I %e:t iq.

• • rl L.._

<;9 g,.e;. ~ J i,' .,2 n, { p g '-----J, , = ~ _b !I l

• 'A 1

r f. i u i g d,3si . l. a; d 6' +- g L,' l.! p' ( r' p. (' ~ ' (p '.: u 4 ., " { - (. '.} Ql i = c, i . - (i- -.......{. [ 7 ,F [ ,i t

(

.g.$.:t.fi.a v cr J cf 1

8. t J..i ',,* ] [.,i.,. $

j i h* f'. _.. _. [2.: 7, -, 4 [.._____ ,,b [. l l^ s j. i,n,, g s I \\ (?t.f ' I. '. 4,',,1 e t,,'. t. l r

.~

i 6 ,e-c. a. l ,f d 5dl Id J I, - ' ' ' '-,- - ( / e i i.n', j 4 ey g> s y ( i,l e e i 4 .'l ;, ur I j, a .,,,. tis 1 e i I i 6.- i l N j y } 7, '*"' 3 - -.--._,.s. ( i -~;--f. ? ..t*t 1 i , s, 3 ,f A: } ', l, ',, ' ,'I J t ;,,; h, f,y he b / 4 g 4 6, e a m,- o y I. - -.. / <*.' f,, g,, d f A ... a m. rt. 5 A m-}}