ML19268C165
| ML19268C165 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 12/01/1979 |
| From: | Ash R BALTIMORE GAS & ELECTRIC CO. |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| IEB-79-01, IEB-79-1, NUDOCS 8001020635 | |
| Download: ML19268C165 (2) | |
Text
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Decereer 1,197? Ub ), t6seesie s=. = 3e.e=, ,f$ ' omatwe =, i !y o M, Offlee of Nuclear Peneter Penlatt' n 1.N Washtarten, D. C. 20)$5 . i.'.1( - \\f. C. Nelent Peruistor.y formiselon d Atta: Wr. Pohert V. Pe t o.' cht s 1 'N Deeratire Peactorr. Pran':h 8'd J[Ik Division of Opera'.tra Peactcre , ' ;, ",?. Cubjects Calvert Clif fs NeJ ear. Tower " ant tinit a Me n. 1 8 O. Tb ek et s No m. " '117%"M10 / fpv t enneer.t el 1? Drygt ad T.1 ee t r ! e a,3 J,ru9,1*t.n,,t. .l7[, Pe f annee r (a) trPc It fulletin TP-C1, ?/0/10 -,J. (b) W.6? letter datea 1.1/'i/To frem A. F. !.undvall, Jr. ry to R. V. Pe14, IE Pulletin 79-01/01 A .g , :.m .fp r.ent!ement .2,\\. In our continuJne effort to identify electrical eeutroent which 4, does vnt have evidence of creper envirorovntal quallricatlon mniaant to ~[. Peference (a) a.n4 as 1ast reportet in Peference (b), our staf fdorettified ~ a spect ric costponent on Bovanber 09. 1979 Wich di'l not arrear to b* owalt f ted for its envirnament. AMitional remanreh that day and the next has led us to concluae that the colle in the no3enota actuatea innloaaer valees for t.be main atena isolation valve (N3TV) hydraulte syntees in both ..C unite st Calnrt Cliffs are not protwrly qualirted for enf attrw ambient .'jj[' tourpemtur*e in their installed loen' tone., Thin t'indina vaa renorted to d.?,- oer KPC Project Manna.ee ce fbvecber 30, 1979 by telethone. % t telachone meseawm and this 1*tter constitute our ti hour rotert pursuant to Peference l (a). .i Coppoweat Iderttif1eag,1eo _and Nnetien h oclenciG aetuated unloader valve in located downstremis of the htsh pressure pump Wieh is used to (a) pressurise the Hri!Y meewrulator tspen receipt of a low-pressure actunttnn sienti, and (b) to pmvtoe riu14 direet1r to the METY actuator to maintain the ve.1ve in a shut reettion., When the soleneta is eneratted, arms the pump is operattna, the esive closes espetna, the puero discharee presFure to increase and thus fort (ns; the finia thromat to the PCIV or into the secumulator, as required. N erstees will teest Wen areuunalator pressure is restored. ' When the solenoid is not enerRIsed and the pump is opemt.irut, rluld is recirculated through the Dermall.r open va1ve hack to the reservoir. he solenota cotia. rate 4 as Class B", are only qualified for an anhient tewreroturs of 7007. *ftw loestles of the valves requires that the coil be qua1Lfled fer amblent tasunerstures of up to 1?fFF. ~ 8001020
j M4 December 1,1070 P- ,i Mr. R. W. Bela P J 1 E.!!.*.V..A *I.8 8 We have perfarmed an anntvals of the votantial renetq"eneas of 7 We have C, sn uni na le r v al e s an1 *nrit a tn run e t t o n nrepe r t y. j a failucae ne te nn Leew4 tate enfaty rence*n nascelsted with this i cogelind e-) tht*, eheep def te t ency. '1" hts conclusten to based on the followina points: m eetle are nor.=31v deenerntwo and nas e.nutr t for nor=al J 1) funettentna e' the Wl9tv hydrsuite nyeteis as low me accumlator p pressure te above the blah eressure puun actuation signal; 4 ?) An aslare u rne the emeretne i f the hiah pressure hydennite puan J na t ata$ n d t ac.a re.. pree nure, a n i t woul d tw t. 1 T t.he t ones nnt oolenoid coil vse to rail to operata 4 4 4 'O Tf the meeunnitator nr.neura esn't be resters 4. the tteense 'rechntent On.cif tentione nenvida A*:t t on r.tntevent e to ensure
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ola.nt safety ('t.D.3.7.1 5 ROTV Opereht11 ty ) ; l* d> h) 'The kr. TV ' s srw hy desul t e n y a t.ari a re a u s r ei n e d mnthl y to e n s ure oporsbt1itvi j'; ' (. ', ) Dystem desten a s desc ri t+4 peeel.t4*a the ponathility or a need 7 to shut the ICTV's e oncurrent vith the aviatence of Inndequate f hydraulle nreneura to shut the vstres t
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'the vie t nt ty of +he plant Were the uninader
==1 vee are located te normally arneated tn ba ' in son anblant tevenerstiere ennre of BC -Wr and t o not erwaetard to axened l'70'#f t O T) N ni nnt. rma ra t ore have been nierted to the netstitial emblea { vith the unloader va.1va nolenntos nnd will mnttor their operation g until the deftetene,in corr,eted. g M i rentt rmed Pt snt Oneration Be.s ed o n th e snn1 rw e e n ie==n e t tm o sbov e, ve f ael t hern J a mani a aneuranee t. bat bath r al ve rt ri t e"* ttn t t.s c.nn co n t i nu e t o cree r st e vit twa t 4 any derrsAation of ovarall n1snt enfatv vbile a reso\\ution to this probles= } e new, environ-i t o d et e rn t rw d. We are nettvely inveetirsttrue the purchase c nentally-ejusit ried valv s eines t he orte.inni vnt va supplier, f'ontrol [ Conc ept a co rrerat t n n, oc e a not namirseture envimrvnentalle-q9al ified co!) e, s.no amthe r b re.no o f e nv 4. m nne nt a31y-ou n.1 S f l e d co t t a s s eeMy w ill not f i t into the existina. valves due to diesensional limitations. We v111 ke.p you in'nened of our urogrens in correcting this deficiency. ry, rui yo T. Anh y Chief Mue' 7 lear Pn41reer Fl ectrio'.1*nzineerira Depetmen t PYA/ sun .}}