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Site Problem Rept 193 on 740530:normal Operating Pressure Not Maintained in Pressurizer W/All Heater Banks On.Probably Caused by Stripped Threads on Yoke Bushing of Valve 2RC-1. Valve 2RC-3 Closed After Reactor Trip.Supporting Matl Encl
	ML19322A363
Person / Time
Site:	Oconee, Crane
Issue date:	08/29/1974
From:	Creacy C, Fisher K; BABCOCK & WILCOX CO.
To:	;
References
	TASK-TF, TASK-TMR 193, PROB-740829, NUDOCS 7910040544
	Download: ML19322A363 (35)
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rictcher - cu.itity.u urance R 6 3,, /,f - Ta.k tr cineer pT3 3g _MA CM/, - St. Fre4 wanager 4 I The attached, cleared SPR is submitted for your information. TO: J. N. Kaelin - ArJCANSAS E. L. Logan - SMUD B. L. Dry - OCDNTE L. C. Rogers. "E"! ED v 4FM sw MN D rx %, Attached is one copy of Site Proble a Report No. /91i whic'i was prnes ud [,gJ%i e on Centract 623-30 O / Future contra:ts have been reviewed for the ? / potential of a si.ilar prebicu. This problen is WRli 3uh considered applierbie gi~ .e to other contracts C3 09; OS" g 'f.cr je g O[ D a h }) i Rn%RKS: h ', 4,dy Ok [],, re]& 6 &de 1,. 4:.. n,. a, n..,. n

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...__.__m-I ' ~ ~'rDs:-no91-2 (9-73) () -. ~.. - m-r - --"mq - "N~O"" () I, l SITE PROBLEM REPORT e BABCOCK & flLC01 CUSTOWER Dh.e Pcwer Cc pany CONTRACT N0620-000h SPR NO.193 REY.NO. o e fd YENDOR Rockwell P.O. h0. TASK NO.28 GROUP NO. 41 SE0.NO.01 IEN SITE ENGlhEER l REQ'O. RESOL.DITE REQ'O. COMP. DAIE e r E. II.. Fis cher j 2-> TITLE Rc-1 FAILED IN cPEN POSITION I DESCRIPil0N OF FROBLEM ?Ja.. l i hIO I l O d SEE AWAGED l W ?ff ~ . O c i h j a g#. 5 STATUS ACTION 10 DATE lhCLUDING FERSONS CCATACTES We3 k@y';- 1 SEE AWACHED ' ' MC' C""' a ;r.

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( k ? k $?t Y Y $ $N A Y $ f $ $ b N b Y 5$5 h-h$$k[h1 S Y?_E S. 2 fl .e h rn _,i-s. 1,[ INSTRt'CTIONS FOR PDS-21091 - SITE Pe0LLTA REPGRT l J ? Infriatc<1 by NPC Nuclear Service (1) Originator - F111 Ir.: Customer; Contract Nueber; Vend:r; Purchase Order .T. c Weber: Task Number; Croup Nt.rber; Set;uence Nu=ber; N2=e; Titic; Descriptien of Problem; Statur; Further !I. Action Recor=nended by Site Fersen.el; Originator ] Signature and Date; Vendor Clais (if applicable). (2) Site Operationc Manager - Fill in: SER W eber; Revision h mber; Req'd. '~' Resol. Date; Reg'd. Corp. Date; Approval h Signature; Date. .. f (3) Nuclear Service Support Engineer - Fill in: Cost Category; Authori.:cd hn/* Charge N;=0er. (4) Task Engineer - Fill in: Resoluticn; Recot::sended Etd.'s Change *; (if . ' ~ . applicable, FC Heq. and FC Eu=her);., Signature and Date. J

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Task Engineer to resolve with Standard Plant Manager. ~ (5) Field Engineer - Implenent resolution; upon ces:pletien, fill in: Completion c Report; Date Co=pleted and Signature. l' ]g NOTE: If neces.ary to deviate from the approved SFR, 20te deviation and i submit revi nd SFR tn en.. Site Operations Manager. (6) Site Operation 9 Manager - Approve cc=pletion; sign. ne J?Hf'Q Initiated by PTW C.,nstruction Ce:pany NM (1) Originator - (Sane as (i) above) ..,j l (2) Construction Co. Site Pepresentative - (Same as (2) abcve) ? ht (3) Project Manager - (Same as (3) above) (4) Task Engineer - (Sa:e as (4) abcVe) % g ~ ( -W (5) Construction Co. Site Representative - (Same as (5) and (6) above) L "Q;MG $5 w %i k WNW vg ww p 2C L' mM. ws %).9 kM'MA WOh ._._ _ -._.= _- m a

.,c.,..-,-._.,.- m (a) (,)' q -.+ Babcock & Wilcox SPR # 393 Fev. 0 June 3,197-Oconee - Unit Il P'IiCRIM'IO:s OF PR*3 LEX: Mter the latt react or trip on "Jnit II on by 30,197k, it was icpessible t: keep the no:-M cierr. tint. pressure in tie pnscuri:cr with all hester b ank s c=. It appeared that the yoke tushing threads cf the notcM;erated valve 2RC-1 are stripped tecause h? shaft does net nove in and outrof the valve, although the =ctor runs and indicate

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STATtS - ACTIO'i TO OATE INCZIN3 PERE 0'iS C/f'D: To nai=tsin the pressure in the pressurizer 2RC-3 was closed ef:er the Resntor trip. With ZE"-3 closed a =inimus bypara spray flow of 0.75 gym 1s nwt maintained as per IP 1101-01 section 1.2-5 Stan En11and and Jim Hampton vere infor:ed that keeping RO-3 shut violates licits and precautiens and that if they continue to operate, RC-3 stould net be crened unless absolutely necessary to =ini=1:e the nunhe e,f cycles cu the spray nozzle. D;ke das also asked to revire PC-3 nc tha* it couli be thrcttled to r_aintain sene small centinuous sprsy flev. As yet this has net been 1:ne, tat Duke is checking into it. At this time, Duke is san; ling the pressuri er for Boren eve:/ c brs, and epening PC-3 cnly if the pressurizer b;r n concentration is not i vithin i 50 ;;c of the RC Systen. Beren Concentration. e 1,~ Dake has been aaked to keep a lc5 of the n.n er of tines RC-3 is 1f opened te.d the sprsy line te perature lust tefere PO-3 is opene d. f,q Ted Stables has beer. infcmd about this ;-Obles. ] See Geonee I, SPR - 5'io for same probles. 3 IUB/KEF/ch e bk + X tp hkw A.<1 th i t m. .an 9@ 4 a. l .N

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,g -u, [ DATE: [._I_ it033 r'ICATION ATOUCT .. a I -} _, i ~ g,,,, e -g 3 Q Af'Pt.t C AblF 70: Q lA W g',, ',"p ~ " ~ ' ~. 3 STATION: UNIT I - iLS () O (D ~ ~ Uf.lT 2 - YES (I) t:0 ( ) io UNIT 3 - YEs (-) t;o (x) sui.t TURE ss s'., OF ccar.'"El T. AFFECTED: '--- Lc. r Coc1 u t LL DESCRIPTIO CF fiODIFICATION: 7 $!odify valve 2KC-3 brecher seal in circ::it such that the valve :a:. h eperated as a throttle valve rather than open-closed type. .e.

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s , L, ' M ';.., ' = -,. s o m ~ .1.g @;j% k ~ JUSTIFICATION FOR 2".ODIFICATION: Vith nor=al pressurizer spray val e 2RC-1 inoperable ve need the capa'allity of =.aintaining a s-Z cent in'ipus spray Lov to j the pressurizer for the folleving resscus. , d O 1. Prevent E cencer.tur' ion b> lldup i.n pressurizer. 2. Prevent execcsi.t therral cycle ,f the ; ressurlar spray nozzlc. 3. Allev tontit. zatfen of certair. ;.rotietts of the 7M pcver test progra:*. .;j ,;-l s FE C"EST ORI G i f. AT E D E Y: {g# P RE sit;T M !J5 tit d : S. A. 'folland ( ACil ot. T.' :. AIL. PE R5C';5 C0'G ACTED E TC.) FE 8'MT MO4 T : oconte. Crc rations l.None A5516N.E'JT: Assistant Crerating Eng*ncer * 'ff

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TI.e st.bject Site Freb1cm Rescrt descrited a condition Gere the spray C;,{p 1 i l' valve res s'at and cpes ' :crio 'ically. When the valve was stat, the fluid ":j'fg J in the spray lice lost hsst tc the at.oschere.:n:', thus, the fluid tt rerature - c, f k* decreased. T,yn the valve.ts op;nc!, the cooler rater in the r: ray line cc:1c .ly,Q f in contact with the Frenu.-1:er rpray nozzle. F.2:Sanical Desi n has ccr. ducted g l a simplified, vet conscr/ative, O'1alysis that shcas that tSc fati;uc life of the 'e F /.M. R'8 pressurizer shay r.czzle S23 r.ct 1.cen significantly c.fictted by tha conditions '. l ?. 7y, presente.1 in the subject SFR.

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w MWOR UMITS ~ w-CDST UMITS bN'k +ewn* omtIb. ,$ m %. %o.., ..vytltp L fy MP[UO: 5bffffI &dsine;6l' Project Mana6er y w A:hnyx i* ..,w.s . GMb e .E ^ h h. t['y+ m. ; m m e e. m m;W 93:Ms dh[J.'.Z.y ~. 3,.Wm' h AIG Z Y es* ~* -. ~~* - m'.w, ew, mu,. o

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FILE: 1.M2 p ... q i f /Mr-TO: For Inferratim .' m Ad Cent ral Engineerin;. Files S P D. /_k i iEd I CONTRACT NO: [620-00 'A $M L*4 s A1 1 A C. C. Plun* set t - Centract Ahin. TITLE -.7 [O - / [A 78 d-f -[nr OhH htT?OW - - - - dYr,,gu _C. M. Tietcher - Quality Am o rance k

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~ I f N6 MgQhh M E Si r. P r a_4. ' tan a r e r k g l' The atraebed, cleared SPR is submit ted Isr your information. ):, ] s V TO: J. N. Kaelin - ARTESAS _ hE. USSR ,.8w I. L. Logan - S'O

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d. 3 Attseed is one ccpy of Site Preblem Report No. [D shich was precessed $,U A > on Contra;t 620-09 f s e<gurn -O,r ruture. contract. have been reviewed for the %sW;Y potential of a similar prcble,. T,his probleh/is not considered applicable 7 to other co: tracts 3 (Le &w*cO1 s fid:n RE s wS: t 'Mp4n .:473 %.lMD W 2?ld ':c.9 W se., 8 r, s 1 .?kh %{-QW)i xw 4t nyw g G. I'. '.'?S :CLi*.O - afde D..r M..k,h CCI 0;MD 1_.

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( ?.;'. !st A SERVICE SUP E';CINEEF ENN f-:l4Td/l1 1* 7&y rTzF M 2 'umwm ' ?i',YN.,f,1

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~ SITE PROBLEM REPORT .. ~. -.. . ~. ~ BABCDCK & sitCCI.' %, g,.s -= d CUSTCMER u, pg e,. e, 1., CONTR1/T h0c c.o33 SFR h0 193 REY.NO. n i VENDOR poewe 2 P.O. C T ASF. h0. 3 CROUP k0. 2.1 SEQ. NO. a j M SITE ENSlHEER k J /p t. < - REQ C RESCL.081E RE0'0. 004tP. DATE i ['] 'm. n e. $/h itTEE i 2F.C - 1 FAILF; 'I OE?i POSITICI I 4@. DEFCRIPTf0N Of PROBLEM (i l@ .i a ('.fM Eee Attached: .y 4 r.;4 x.% s.s :a. < M)M "e 1l

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SIA1U5 AC110N TO DATE IN:a n3 PERSONS CONTACIED 'M-N (S. tw See Attached: ~ M C-j yykJ pd? IUR'HER ACTICN RE'.'CNMENCE3 ST SITE PERSONTEE %?5 Q Cee attached: \\ ~, ph:; .s S %*h s. Lv ~w1 A / I@OlJ e 'G' DLL f2f Ld%_Y M 2': ? ShWW RESOLMION / } / LQ3 vs pm, l .y 1 s@. h n L APPR0iED BY (~ F 1 o 2 iTuRE // DATE hQ y N.S. SUPPORT ENGINEER '_Me.. ~[ /Jt/ M -, f Q;/j 3 IASK ENGlhEER ' ~ 19,5 3 / j v. / ynl x - j Mwff FROJECT MANACE R O. /1. f y l/2-/2-79 i Js" 8'OST CATECORY O NORv e c C O OE O VENCCR CLAlt d O@# CHiRGE NO. ! O FIEED CHANGE REO l FC NO /58 l AUTH n m ,R - FIIE C0WPLEil0N REPORT 4:%; MW' Ft -2Wiless - 1) K - rss(M1. &(n - t0 2[M55-4) O RECCvuEkDEO util se lu e4 e

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STOS. CHANGE i n r kaises Qj E 71 h c/cm o//

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.sp,r riNu ci. w ear a, j $12 ~ gf j DEVIAil0NS M NONE O SEE SPR RE(. h0. l

==c. w v.. n n ~ s o.v. cys.re, 4-E (DATE COMPLETED 11/5/74 lStENE0 JY/p//Q[, C1 D C OLE g h S.O.N.,CGNSTR. REP. APPR012t,/h l0ATI p/g//V rtN f, n 3, pa i i a 1,:*Q '/ p .g s } Ym$~ C S**!WFliM?. r hhh.mp[N$Y[hweh.m$ bhEib5N[E$ L UT $h,;bNQMkdh$hhg [(kbh h ANf.>yu.w.

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Babcock & Wilcox gPR e. &., Fev.., June 1-:. lW Occr.ee - Unit II n..m.

r< Ic

m. m.. 3 m._.4_

Ar.er t' . 2-. resetor trip *on Unit II on l'sv 3;,197L, it s.u impossible to heep the nomal cperating pressure in the press' rizer vi.n all heater banks en. It sp; eared thst the yoke buahing threttis of the ceter-crersted valve 2EO-1 are stripped te:ause the shaft d"es not :ve in and out cf the valve, rJ theu-h the notcr runa snd indicater c10sel or cie losition e of I?2-1 in the :entrol roes. r.. c.~....,. - 2. L.., .e...... s..., .,......a.i., T.r...x. s.s.., m~~:. o e a .m To caintain the pressu e ir. the pressuriter,2RC-3 vaa closed after the Fea:ter trip. With 23J-3 elesei a tinimum bypass sprry flew of 0.75 sp: is not =ain'.eined as ;<r IP 1101-01 sectien 1.2-5 Otsa Hollssd and Ji: Earpten v:re informed that keeping PO-3 shut vielstes ll=its asi precauticn: ed that if they centinue to c;erate, R1-3 st:213 not be c;cned unless abselutely necess L y to nizimi:e the number of eyeles en the spray no::le. PAe was also aske.1 t o revire RC-3 so that it could te throttled to maintain se=e s r.11 :entitucus sp-sy flow. Additi nally, S'r. 7. }illier and Mr. R. Feynolds of Mt. Ver:ca vere ec:.t te.ed in an effort to dete =ine whs; the effcets of fre ;ent cycling cf 2?O-3 v?uld be on the pressuriser spray nostle. Sir. Miller c:uld not provide an absc. ;te number s.s to -he silevable number of cyles, or even what ::nstitutes a.. lei A-h vever, he did stat + that with the p,rassur!:er at =c: :.C c;ersting tenr*rs* e, [ Opray line terperatures as Icv as $22 F had ':een calyzed. 2.e results of :hese analysir ladicated thr.t *he expected n> :le ifeti=e was n. significantly reiu?el. 42f ?a Based on this ad11tional infemation, Mr. Stan E:llsad and Me Pcve* opersting-W' persennel were infor:ed that if they were coing te eyele 2?;-3 in crie 'n-a E tait pressurizer bcr:: ccccentrtution, then they esculd cycle t he talve t i frequer.cy such that spray line tempera,ure did nei de:re sse t c teltv 512 ' ^. 4 a P his i:.fer=r. tion vns also provided to D2e Fever C=pany in s letter. (Encl. *l) .s. r C Py June 11, Duke Fever Co. had ec=pleted electriesi =odi*i:st. ens to the 230-3 e opernor to allev this valve to be stopped at inte=ediate positiens, thus a allowing it to be used as a throttle valve to maintain centinuous spray line flev. '.he valve is nov teing cycrated to naintr.in ec tinuous spray line f' ev. i1 The data requested by the letter of Enclosure il is here included sa En01:sure 72. '"his dna is highly suspect, since a brier exs=1:stion of it vill reveal grcss f discrepancies between time-tetween cycles, and spray line te=perature prier to cycling the valve. These are unexplained at this ti=e. ? 'a A .!!D if. v w [%.hw%.x&e~d _UEl[P;,Rtfn a m;f,; n,5& ? GQ,)5 l_.". T *b y&pr.u,.QL ;2*Q'RJh~r.&.hh5 jf. ~ f'f:a}f f ? 5f .,f_,.f.gY Yh. ~ ~ m ,.f.w.n

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s ./ INSTRUCTIONS FOR PM-?!091 - SITE PROBLi*i REITRT Initiated by NPC Nu-Icar Service (1) Originator - Till in: Custxer; contract Nuzber; Vcnder; Purchase order Number; Task Numbte; Croup Nunber; Seque.nce Nuder; Na7e; Title; Description of Problen; Status; Further Acticn Reecranded by Site Persenscl; Originator Signature a0d Date; Vendor Clais (if applicable). (2) Site Operations Manager - Fill in: SPX Number; Revialen Eu:ber; Reg'd. Resol. Date; Req'd. Co p. Date; Approval Signature; Date. (3) Nuclear Service Support Engineer - Till in: Cost Category; Authorized ( /, Charge Nu=her. (4) Task Engineer - Till 'n Resolution; Reco: mended Std.'s Change *; (if applicable, FC Req. and FC humber); Signature ar.d Dato.

If recomoceded standard's change, transmit a ccpy to cegr.!:act Standard Task Engineer to resolve with Standard Plant Manager.

(5) FicId Engineer - I=plement re:olutten; upon completion, fill in: Co=pletion. Report; Late Completed and Signature. NOTE: If necessary to deviate fro: the appreved SFR, note dr* vie: n a=d surit revised SPR to the Site Operations Manager. (6) Site Operations P.anager - Approve cespletion; cign. l 1 Initiated by PC Construction Cetpany (1) Originator - (Same as (1) above) (2) Construct ict Co. Site Representative - (Sa=c as (2) above) (3) Project L.ager - (Same as (3) abeve) (4) Task Engineer - (Same as (f.) above) i (5) Construction Co. Site P.epresentativo - (Same as (5) and (6) above) e = w m h

N, IN, g.,<". [L@ g6j Babcock & Wilcox y SPd # 193 Fev g @(:ygd June 12. 19R 7 . q %ql' l Occnce - Unit W With 2RC-3 in a throttling position, the following data was cbtaired fro: .49j b G.m )

WS Unit II:

y g$b sa f. ?, Tave = 579 F ,dSd Tc 553 F = h@1 E Qf[ T (sprey line) = A73.5 'F 'WW Pres = 2155 d, M ch

P.~ tr Rx. Pcser = 75%

apl '2;G:4\\ sG. qc; By cor.parisor., Unit I parameters am sho n below: y<;;g. 3 cA ..m 7,4&) .My&& o n Tave = 579 F 4 ~ An a - ypg Te 556o = i Pres = 2J 55 g %)? T (spray line) = L82.8 4 % pc41 91 ?,' Rx. Pcver = 99 + % h[ h!h The above data should be compand with the transient data of enclosure #2 to $;g] detemine the validity of RC Spray lise tem;eratures as li.ited. Note: ^; Spray line term couples am on the exterior of the pipe and therefore do not mee.sure gM V.MJ1i true fluid temperature. u,u > v 1tO Q; t d

"E3.ZR M":'TO': RE00"'m D BY SITE PERSONXEL

e. ly%e..

\\ t It is reco== ended that the data cf enclosure 2 be forwarded to Mr. R. Reynolds W$ 4 taa n '.,q.,r $ fer naalysis of the ther=al shocks to which the spray no::le vas subjected. ]yu p %, c. [k is further recc:mnded that more definitive info: _ation concerni s the It 'g g folleving be generated for all contreets: tG- . W k; M..g}f C,.y,kj

1) Vnat temperature diiferential ecastitutes a sprey no:zle cycle?
j I.G d"N7 R: d

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2) Hev many cycles are availablet n.

,w >l 3 !U".3 3) CiVCr. *,he laT situation rep e?.tS itPelf, WhP.t is the beet V3y to g4h 4y operate the syste= while continuing plant operatiens: @M. g, A 2;.qa ,s .n , - m., Ol '? y pg

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% M'",' Y,' '.. F. M;';.. e,.e. A.%. Os*cnee Nucleat Ststic.: mp p g O. N (p[9%. agir;.y P. O. Box 1175 . -{ .,' di.E' 6 Seneca, South Carclins 2967S. <s. t ? M,.,,* '. WJ M,Jk,M ~ J u .w - t .-.

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u I .l Line Step Valve (2EC-3)

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'gt; q#b%5 Subje :t: Unit II Spray 7 'W.- o.. v,,.. A. C v hw i-Atter.tica: Mr. J.' IM Exith 7< 78);MN.'N- ,L NNF" @. a.-/' 9 n ( . c,.4 M l @J.y. in.c r. y h~ _.. p@w.A 1 +:/,,Q -. '.id, p!

Dear ifr. Smith:

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~ m e 5.% i L.. p.gh+.qq [.:. Pecent failure of t*m spray lise valve (2RC-1)'in an interriediate ,. S pU ] Q MS **p[% ,. - po::ltion has required that the abay-ll'ne isolation valve (OI:0 'O be M'- ~# i. shut ' and opened caly as. n.ecessary. t.o..risint.ain. prennurizer borea c n -

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' - *fk, j ,M-g . a,p t g. l Mr. Sten Holland and Mr. Jin Ea:::pton vere in* creed by E. & W. perser.nal that operating with 2I<C-3 shutL violates limits end preenutlens, -'? 1101-M.ms A.h,d,f

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( 01, in thst the mnic.=2 required 'crray 'f1:N of 0.*l5 cp, is not es;ntained. r *#,*@.) ' C dh g

3. 8= W. h:u further recoscended that if this methed of o:er.stic., is cca-

? i MW'C"A tinued, f20-3 ch ::ald er.t be operated unless etsolutely nA ceass r to r.in - ' M" *! k.h![ 4 i=1:e the nu-ber of te:Peratt.rc trancients en the spray no: :.le. %%, %p),2 '~ }

{

m An additionni facter to cen' sider is'the smrity of the thermal'rhoch 5 h? 5'PT.h) { i suffered by the sp~;y nozzle each. tine. the valve is cycIcd. Ann 1 :is of 7 R te ;>crature *rs s!cets has been previca:.ly perfor:ed with 5'2 F u the .hd 11 titing miniru:: n;rty flew te:=peraturo. Sus, it is f arther recc nendel @N - /Qhf$.] inst if it is a.ti:irsted thst continuous cycMng of PC-3 vill cc l h@.;.F'd% 't" c.uired to prefe.t es essive lorca concentrati0n bulldop in tha M(13 rreasur-g' iter, then the valve snould be cycled at a frequency c-.ch that spr'ty line Q g;M.h) te::'perature does not decrease to below 522 F. ,1.' p ggQth$ l yd ik .s ..J.

'hile operating the :ressuriter in 'this ecnfiguration, it is requested 5.~ '

a ,* M 2* thst you los the fo11cuits data each time ER0-3 is cycled: m W' NW-m.e.

1) tice at which the valve 'la ' opened'.

..s m 1, *3 O $2 1

2) tima at which the valve is closed i.

W[%wcw$ r r 2 temperature in the spray line just p:icr to cpening the valve. - i ?.: S. 3) % p(l M bj@x)h drj~ , _, '..;. q'.. n... ' _ '1 ' s[ t ,,. '. f. k ^

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The Batz:ock & Yolece Ci.opacy / Estathshed 1867, . - 1 '~..' l a. sp i l, . ).!*.M h {\\@.s6 d; *.sfb 4 + o v.'s. .J.. .s .g8... -d.* .,s 4 pe rF nG%% k * ' '," $ t*- N OJ * -"? s 4 [ $ $ h k_. _ h k )k fhff[ ff $b

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. ~ Based on conve:sations with Unit.II cperating p.erscnnel..v.1 "r. M an

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IIcliend of Duke Power Cc:=pany.,this. data'i[new.beine, lorced. It 'in, '.hr.% ':.qM*i K miditionally.meemorded. thst' you. ::cesider re-wf ring the cer.trolle:,- N N!T.'$:' CQM. for 2 IT-3 such"tha*, the valve r.Wy fe partially epened.in criar 'to t Yahd ' W . ::~.intain a sell continuous.Ja. pray n.,ow..,, s s., u. " x. m m.g M p 41

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m.-...-. m_ t0 0Y h BABC0CK & MILCOX COMPANY u. . it, POWER GENERATION GROUP To l _ Pressurizer Test Engireer l R.B. Reyppjds - CCRontCir.se ent-EGQ-CbrLVernen Trou Lead Engir.eer (Ext. 319) l i M5 6e n U.R. Itiller - Hechanical Desien, f.?CD-CE - !!t. Vernen

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Or Ref. 2.5.2 Duke Pcuer Cor.pany 620-0004-59 S u bj. Date SFR 193 Rev. 1 July 19. 1974 ) m,.. u., s. ...te e-...q.c. e.... The subject Site Preblem Report described a cendition where the spray valve was shut and opened periodically. 'a' hen the valve was shut, the fluid in the spray line lost teat te the atmosphere and, thus, the fluf t terpcrature d? creased. L' hen the valve was c;aned, the cooler water in the screy line car,e in contact, with the pressuri:er spray nc::le, l'echanical Desien has conducted a simplified, yet con:2rvative, analysis that stows that the fatigue life of the pressurizer spray rcz:le has r.ct t.cen significantly affected by the conditiens g Fresented in the subject SFR. If you have any quest!ce.s and/or cc rents, please call. / i !: }l,. + U. P. Miller l )

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7, -,......~.,,,_,--,- _ 7 c._.,._ o s $11;vIDELEW REPORT TRANSMITTAL i v File 1:M2 kt;yNoth.s ~ Fer Action CONTRAC"" 600-00 OM k.Is. cni M3 tb I 71'TLE D f' C -I ktLfo Tc C.A. (ypcy Pcr Internaticn [w Cfre }}e so TH k '/!/ 7 DATE Date Finza Resolutten Required by prlen cervlee Su ;ert Fr.rincer Action itcquested: / B. &vuote.s T., Pee v reo Y-Eut uert %< _Ennsieur Goreers Ox Tnr 5?@r blo =x a* An 0.s ec* )G Ms.sE 0.s Oc cysres L Go SPR. f$thv II)rmo 4 $77A CHFh G Direct nrly in writie..- to N.S. Suppori Erci r.eer. Ples-e rerly Ir eliate'y C. C. Plunkett-Cor. tract Admi::. vb, ether p.sver ir fir.al or trolimir.e. y. c: t -e

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xy.x -c <_..3,m m--3 r l. . 51TigCDLEN R(PORT TR ANSWITT AL g N 11 "*' ] yj e 1;yg [ 3. E$ S. ,.<ns For Actien ~ Co;iritM;r (...'0-00 /1 h + I 'f Sill /43 WV l '1 ~ TITLE 1 Pr-l _ l ',\\. :,, 73 b_[I. For Inforr. tlen ta l A P. O Ti. 3. T. < 4 ) l ?: r - .r. '9 \\ s s r.s _' DATE (, \\ ?. o I v/ J ~ 1 Date Final Ber.olutica ;icquircJ ty 'Nelear Service Sut port h,-Incer i ,q j' . Action Requeste.1: [ b O, m/.( f, c_.,_ ,,, j,,4 , f' f .,,,. u, a f a 4. 4 c.. // .kcf .. n.n d / ,4.',_.,:.'--, Y $P2. 0._.'. 0

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- a APPilCABILITY TO OTHER HSS CONTRACTS %n Check applicable statements. g 1. This Site Probles is definitely n applicable to the folleving.C3 ccr. tracts: did s+q p.c Reason: VO 2. Tnis Site Probles Report is cui:pected as haring effect on the fel. levin;; ::SS Tj-fj eentre, cts : ESS-7.e;j dt9 3. This Problem could occur on other centracts but could be prercrted einply by f*p;) inferning site perconnel a.n.1 the custe-cr of the I,otential prcble.. g Tj to l. This Site Problem could be prevented on NSS-and subrequent centracts Af; i by changing Standard @e7 O. !.o. or Title h ^h r V yx b ..,,r re t.cd

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Ia Ilabt;ock f.Wi! cot a a h SI'H ( l' 3 rn.C Q ) .fune 20, 197?. H 1 oc. sac <. - cnit n 2 -.1 Wi t h 'I C-3 i n a t h N t t li t;g po.;i t i on, the follwing data was cbt ained fr:c. Uni t II: T ' q' ' c. .-r- -lc a K C.,5 ( ot.o ( Ur p 't p-e o Tave - 570 y tir';'f s TEr#. (I.c9th8t. U4u ] Te 4 $W F = . rm = 2133 [gg, h.g,:.d T (stray lin,-) = Iq3.S* *F Op. RCS q . ki Ex. rever *'iS; i koth kt4 y her (i-Q p By comr arisen, l' nit :

wxeter: am shown telw:

Tr.M. ", ',tt.,[t\\ kc }. C e '*,, 4aJ'. tt j Te 556 ? = E Pres = 2155 ? T (spray line) = !.S2.8 Fx. Fever = 99 + % ij is The clove data chcald be cc: pared with the trer.sient data cf caelcsure r2 to N deter.ine the validity of RO Spray line tecreratures as listed. !Iote: Spray f line ter eccupies are on,the exterict of the pipe and therefore do not ceasure y t me fluid te perature.,';

p. *,19.

'X :Ni t c.E pc,t u - (O i.,

4 e.,.... nrwr? ;c710:: nyr ~c:rre ny strs FProm:rt ~S ,' M IN S WrYscu [ M L) It is recc=er. del that the dr.tn of enclocurc 2 be forwarded to I'r. R. Reyr.1ds (y fcer cnsly:is of the thermal shcchs to which the spray no :lc vcs cu1Qceted. s,[ It ic further re:2. ended tht.t tore definitive infor:ation c: cerning the 5 following be centrued for all centracts: $o ' 1) 'That ic=perature differential cent.titutes a spray nc: le cycle? jy # " f-p 2) 11~ many cycles are available? c 4-..' / [.1,:. N.' ,'* / f(,

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4 and 3) Given the cr. u situnticn repats itself, what is the best way to i.- t f oTerate the system while continuing plant operations? h 4 f 55 v 8; DS/a.:. >s s L 1,, 4 - - t t rm., ~ t' >e V,i' M .s, Q a r.,.. 6 3 b o ~ s m R v. u ( w[If,_ .S?) 5 f 1:'y,, \\*sw&& 2]. f,'f ?rQL I5f Nk s.*wi.152 p h. YO }E . i-o m m c o a w. m,u%'-.t,_:&.'l -((S_[J. ym" c a.. a

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Dear ifr. Smith:

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