ML20024C302
| ML20024C302 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 06/30/1983 |
| From: | Green H, Holder E TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| LER-83-007-03X, LER-83-7-3X, NUDOCS 8307120501 | |
| Download: ML20024C302 (18) | |
Text
{{#Wiki_filter:.. OmnATF RFPORT PREVIOUS REPORT DATE 3/4/83 NRC F3CM 366 U S. NUCLTAfD Ul@ULATORY COMMIIil11N APFROVED SY OUR s j'o'e,Q so LICENSEE EVENT REPORT 3'50-801' CONTROL 8 LOCK. l l l l l
@ (PLEASE PeilNT on TYPE ALL REQUIRED INFoRMATaoN) l ol1 .l .l A lL 7 LIC ElNSEBElC R ODE l F l l!@l0 l0 l- l 0 le 89 l 0 l 0 l 0l 0l 0l 0l 0IS l@l 4LICENSE blC ENSE NUMSEN 1.
l 1 l TYPE ll 1l1 l@l 3. .7 cat l 3. l@ CON'T l o l1 l y
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3 .. .3 DOCK ET NUMB ER .. 4. EVENT D ATE Fe ,5 R E PO R T D A T E s. EVENT DESCRIPTION AND PRO 3ABLE CONSCOUENCES h l 0 l2 l l Following reactor scram MSRV l-1-22 apparently failed to close and drvwell l 1013ll unidentified leakane exceeded 5 com (T.S. 3.6.C.1). Unit 1 was placed in l l o l4 l l ccid shutdown; the vacuum relief valve for MSRV l-1-22 was replaced. Durini; l lolsll reactor heatup on 2/8/83, drywell unidentified leakage exceeded 5 gpm. Unit l lolsll 1 was placed in cold shutdown. The vacuum relief valve for MSRV l-1-22 was l lol7ll found damaged. There was no effect on public health or safety. The remaining l lolsll vacuum relief valves were operable.
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l C l@lF lh l C!h l A lh l 0 l 112 12s.l lY 39 34 35 34 3r .s l@ lY lh lN lh lC l 2 l 0 l 2l 4, *43 44 4, CAUSF DESCRIPTION AND CORRECTsVE ACTIONS h I'l0Il The 10 inch vatau n elief valve (GPE Controls Model #LF240-435) failed to l l 1 l tl l reseat. With 1-1-22 open, this resulted in leakage to the drywell. The l I1I:ll vacuum relief valve was replaced. The vacuum relief valves have been l l1l3ll modified on unit 2 and are to be modified durine the present unit 1 and the l l111ll next unit 3 refueling outages. (See additional details on supplemental sheet). [ STAT s % Po w s e OTNEW ST ATUS DISCOV E R V DISCOVER Y DESCRIPTION l il s .l l. G l @ l 0 l 0 l 0 nl@l NA l l l@l Surveillance Instruction l i. is
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N u' w"D E [" '"oUs C IPTION l il a.l .l'0 l 0l0 l@l 1 i, in NA l TTPE D E S C # tPTIO N l1l9l, . hl NA 8307120501 830630 I qi l
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ADOCK 05000259 , ..
...u R I,"" le'. ,,Tio,. @ PDR l N9e utE oNLv l 2 l 0 l l Y l@l Press release to media.
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l lllllllllllll NAME OF PREPARFR E. T. Holder psoNE; (205)-729'-0885
r - - _ Tennessee Valley Authority
' Form RF 17 l Browns Ferry NucIcar Plant BF 15.2 2/12/82
['l. LER SUPPLEMENTAL INFORMATION {', BFRO 259 / 83007 Technical Specification Involved 3 6.c.1 Reported Under Technical Specification 6.7 2.b.(2)* Date Due NRC 7/01/83 f Event Narrative: [ Cu 2/5/83, unit 2 was in a refueling outage, unit 3 was operating at 100 percent [ power, and unit 1 was being shutdown after a scram and subsequent failure to reseat of MSRV 1-1-22, when drywell unidentified leakage exceeded 5 gpm
-- (Technical Specification 3.6.c.1). Reactor was placed in cold shutdown. Repairs j were effected on MSRV 1-1-22 (see BFR0 50-259/83006). The vacuum relief valve for MSRV 1-1-22 was found opened and was replaced. Four other vacuum relief valves were found damaged and replaced.
On 2/8/83, during reactor heatup, drywell unidentified leakage again exceeded 5 gpm. Unit 1 was placed in cold shutdown. The vacuum relief valve for MSRV 1-1-22 was found damaged and was replaced. MSRV 1-1-22 was found stuck open (see - BFR0 50-259/83006). In addition, the degree indicating arm on the vacuum relief valve was found to be bent and has caused the vacuum relief valve to be stuck open. The degree indicating arms were removed from the vacuum relief valves in unit 1 until these valves are modified during the next outage. The vacuum relief valves on unit 2 were modified during the unit 2 cj cle 4 refueling outage, unit 1 valves are to be modified this refueling outage, and I the unit 3 vacuum relief valves are to be modified during the next refueling outage on the unit. This modification includes the installation of a new modified hinge arm, a new modified hinge shaft, a new modified hinge bearing and associated components, a spacer, and also the removal of the valve position indicators. The modification is required to prevent the damage that occurs to the vacuum relief valvi when abnormal cycling of MSRVs occurs. a The failure analysis revealed that the suspected cause for damage to the vacuum relief valves are opening conditions that were not anticipated in the design r process. Thus, the valves were procurred to operate under conditions less severe { than are actually experienced (see attached NRC'and failure evaluation).
, The attached safety evaluation by Engineering Design provides justification for , continued operation of unit 3 unti'l the cycle 5 refueling outage. Modifications t -
of these valves will be completed on all three units by the end of the unite 3 cycle 5 refueling outage. Previous Similar Events : None Retention: ?criod - Lifetime; Responsibility - Document Control Supervisor
- Revision : th t
g 5 ' DIVISIOM OF ENGINEERING DESIGN SVONCOEBFORMANCE REPORT 8.
~
MEos accewon No r3 s830310 [ B M E88303 l @ maront No. e pas,amanioncasiratioN/ oaf t T. W. Parkalev/EN DES-NES/ March 3, 1983 N //[!4 Jd /e r l - @ ossemittion os coNoiticN p CPE vacuum breaker valves installed cn the main steam safety / relief valve ta11 pipes have been unexpectedly damaged in service. The suspected cause is that tha valves { are being subjected to opening conditions that were not anticipated in the design 3 process. Thus, the valves were procured to operate under conditions less severe
' than are actually experienced.
r . oaTE cr ocevaarNet Esv t i acT i [s,hvis t sicNiFicaNicoNoitioN ensE70ountiiv p'es g % r 5 i e 0 es f
? METNOD OF oiscovERY Unio coot ttN oEs4P 8 ou Inspection ,
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I ny 4. W 34'B3 i Checked 3, wcm we
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Ccncurrence: H-5 n t/ 2 - 3/ 8% [ Croup Head b f/l}DU S //7,[# ~3 . 5 NCR NF 8 6 830'3 (copy attached) i . l The deficiency identified by the NCR renders the affected syste (s): Still qualified for all design 1cadi:s cc binaticas and design
' conditions.
= .
Not qualified for some design leading co=binatics or design condition. However, a functional i= pair =est of the syste (s) is not likely.
Not qualified for seme design loading combination or design
[ - conditien. A system (s) failure or functional i=; air =ent is [*- .j likely. If this item is checked, cc=plete the folleving two
.' items cf additional infor=ation.
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Idestify the critical leading ec=binatics or ec:ditics: 3 ---- , Rec.etel sRv a.c.e e l.(,. 0 ., amad<fe s. trA em 54v ew/.S . 7
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----G Identify the type and locatien of the failu e or functional (L Z i= pair =ent: Vu ma. bre aA e / <</r e dis c /ai/s ce s ea e er s n r ~Ot.ec s 4raus. A;A e c . W/s is>
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e 6+ .ee'll w SKil e aseers.! n,a disc e., AsJ.* e*^ A /*ps.a
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Justificatica for the above f,ud., ent: l N Uilt / ve.e.we. bre d e.r ** /v e. e n. $RV ed/pice s sAnwstL dana.ee. 1 y - y en G al* 13 value,s . Valee. slonci<q o rs+ clasaa.a . ren,e f r, y v m* treaJ feilere. .ak. dise u.A.se.re w;u fr.n r:me arn . TIL f y ass oc.o'o.t'tE MV kad. hee e. a.< t%e.t*A.
- boser C +1u e duriy.
gre. c.y s.Ja. 4 opsra.eiAg partet. Cc=ents and/cr recc=enda.icns (c; tic al):
. vs m br.aker v <A e. were. r e.o k e.= d e r t u it /. Unir & ,
1 l - valv4 w r e. weddie.L osis e t. e,& of resfwahn o.dma e.. 1 I 0,at 3 e.xce.rles<e.eL a arae. to .et le.as c are.1v<le e. ytk
. v-wie> l s 3 oe. e&e/v oo .ra2ia> witL
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$g , &W $sfsty YuAW W3/$
R O i E Baaw4's FERRY FOCLEAR PLANT SAFETY EVAltaTION REPORT
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TITLE: NCN 8U 8E89303 Dell & r'/p in e. V'cnu 8eeake_r Dwa e_ SYSTEM: L!ct/A - 5 te-A. A APPLICABLE LNITS: / a.ncL 3 SYSTEM PUEER: I MECS ACCES$loN No. m , T ra' M 221
.au. ro cviemo l m ov' ; 1EB '830318
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- RCMetNITI AL 115UE
'fAW E-__ _ , _ _ . . _ _ _
NES '83 0 318 221 H o e t" ( w ee .< of P<e ble, ; To dete.ruirte ek e < < fe 9 iy a e a f fors o f easa p ur. bewary ;, s. n. . 11 <, s a/ .6, /r e /ie { a a /a e U.ey) taiIpipe & a e- te s<<wtura/ G it'ar e. o f a. vo.w a b e c.a k e- r edu c-Refarenee s:
- 1) Area.< h~d '%yemt- A/ w e ~ fren N.d. a<a.1/ey se
- 0. w witsea. .t a t e. d. 2/ir/s .1 a) c.w.< a se:aas aiek c/vis Hoffu.s (s w rs- M a A. Fr.) , .
IVAL
- w. K. Suc.h (xrB-M), J.M. 40k e//. (cl~0), ui
- S.R. Law.s e n (8 vP)
') N' K BfM'fE8e 3c3 [NE8 830.h'c 8 S.~)
E .Accior . . kL & stean n fexy/re fie./~ valv (sse v) hn s s. tar l pipe. siet ecwt'5 c-k e- Mll aisky c- ta b eneatk tk e- tcr% s niet e.r . 7'A e- tai / pip e s c.* + te d n. e- % k aej. n /C
- va.c.u. w b y e-a k e r 7'A e. 2f
- ymu.x breake r is a- Powe-ll e.le d vg.lv e- a.e d is swir; to " v .e u- a. n pa.er a f tie. anyim/ desay. TA e bt e sker is a GPE vaeu w .bre.a.ker verlet ~ i+A. n 7
- clice. ,A is o. p.< tio n. e f ek s /any cera +o r es s ttnen,a l m oelifimtion s . Th. c. Fue-tion a f e k <.s c-t wo v a.c. u u A br'erNers bs tc aA +it dry w' Y < it imb t'er n kg.s th e- tri/pif e s i Ste./ SKU d r *r c.ka.t bee.n. e o nele n e a . ri,, p ,.v - ~ q areiJ n a.u. ~
feen 4e< tag in +ke ca.i/pe;pe. scL mkinir.e s tA<
. = = . . un NEB '83 0 318 221 mer a te9m,y wak e.r lay eA.at de-v=Jops san & a. A p a.r ri e l -
v a.e a.m i> fo rmed. . rhe. Gpf va e m breaker. va lv e was edde.d to p< ovid - iner -a n d r e l, e /* wpeeity >c e: te m ininit e- e k e. w e-t e r /ep rker e s ~ d a ve /cp . Jn fer wat e ly , r A e- p ee ss uee d rop ia ete-ca.1/ pipe ane +coffsren d e n ra.rior o f r h e. steam v e e tA.e srely 5gV e lose s is A so rapid. tItac- tk e GPE ga e.u.m Jrea.te r e a /ve . f/< > s op-^- ud ionyin;. e-S p or. e 4 e. iu e., yip e- -a Il . 71e r e eu /ta.rt impac2 / sad .s eke G PE va /v e- Ed eime. W SA'y da,m1 e-acxaate e <a r e e loses , its a. s souated G 7E vae u.m bre.ake r wi// op e.r a.ul s w Wer ,ispacs
- load s . Da e. s.py e a < s to a.c.e a Ject e- wieL y re-p eci e d impa.e&s O e.el G PE va.e. u, g,x
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- 5i breek u r a /ve :1 kave. be.er & & ist uns / ud 3 . Pe.t tLe axkAecL %.ap ne Not " da+e k a/is-/e 3 ud e..ver .s ect ic st vi+ k this
=_ //o// ins 6& pa , Mea. or.) , r-Le. most da.mapc el
= G PE va/ve. sie utt- / was near sed Ai/ete (dise- was u :c rewist fren. Aisye a.nn ) u.cl its assa taeet .sa u a sea we natel alcu1 G + im e s .
m fa.ilure s ocLe.s iduSNed. are twa : C Va lva- retains ie7<ie7 ,be At(s te s e.ad a.nd. perni+s steu. leaky e. ico evywe l1 -%ew
& SR V elise W y e s ) e h e) Valve- lo s e.s irt ,.isy wi+k. disc sefurokr^j
221. gg e 3 NEB '83 0318 frow A,57e arr
% Le e- Lim Ner ni op e-r e re n or re aAsiests F*o < e-1el$r idene,fied faik, e n ad e_ , vax.w w n reli I w;// 6e previded . sitter hi/a.re tode.
eow/d r e sa /t in r e d a e.ed. va e-w u ee lief c.ap,Jp if +Ae dise- /edge d at sae.k a. m e r a.s to eeda< e tke efreediee. F/cw a r e et o f +4.e. vafu e . Er. tAis cas e. +Ae waker /ey e.owtd. rir e to s. kryer level a.n cL e.x a.s t
/enper &en a.s raed in.
a.nalys e s If eA, sgu assae.;atet w;rk 4. R danerge.d. vec.w an breaAer va/ve rea.c -tuate d. w A.ex 4Ac. water /cy wa.s at rt.s hiy dest peix2, th e-. sab.seyw e n+ load s impsed on. tA e- +ui/ pipe eaa& be. hoyke r %. prev,ca.s fy an a /y s a el . Lodpi f fke va/ve ciisc- su.c k. a.s to pro eide siyn/fie.ut r e d uenica ef -rde. vacuw re./tef ye ity i.r exasidueel
- m. n r< e cap,,2 kiqll u w.n//ke.Jue.
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/a arewdias de s- s 4u snak ana_
ir a.,ea ps% a "For eitker ident.+ified hi/a e med e,pp ste
.e m lea.kag e inte t-Ae dqwe.ll wl.e~ t-A s x y a ,i v i e.s wi// se ix.c.-r e a..s ed . Th e- evur dar N to rite discover of -tAe de ect GPE vac.aa. bre aN valve s involved su e.iest leakye to cAe d qwet /
n se asesea ns_ce carie.ee ixvw, pica . thr Ass m p the GPE valve- failed in. see L a. way tie. dise- elicL & in.p e.d e_ f/cw ir cik dIrveio<<. thic /t. -tk e- va.lv e. , tken. +4 =- clisc.Aufr.-.from tale- . a.ss ee.iated MV wadcL en+er eA.e- s.ry we // n
a i 221 same y NEB '83 0318 rk;, wegd rat he.c tAar b- co nda ,es ed. in +Ae ceras _ e c. e. v. c da - eo r A e. p2k. ees42 a.n c e. Leirty /a.srs (ae f/*a eo tA c. d.rywe-ll t ks. Ase f4a c A to u y. 4. rh a. T ysene Ae e s . vsL e sa. A e.,tdi+io ,e s av ry +ike-eke a.ssec.iccte 0 $RV a.c-twaxe.cl , sij nifim-t pas.ctik,s o( <. e ~ w;il .-rs r & e d.,y a e. //. ro e vuy bei./ askua:tian s bypte.a./ of prayer acinatior . f a.s. s R V eLwe- to tesfotary eve.rf re s s u r e. c.cnelitiers Nforr/y
- a. tie.ipax A trans ier+s sae A a s tstbine trip), tke-s tean r lenses s istro et citywe// wig - orel<x.se wklo e de(e.c e.r io a. s. safety sor s epwe.oue e > . Foe weie,es s a.e.A. a. s may easu h fra, yec leyel a.e
&-lafera+e- blowdeu or a. s e u.e k op e-r SR v, exe.
s teae. re/ w eA irte tAa. dry well wiU pt=ssurize the- drywe.// a..u L r ais e- ek - euywe // ataosp, Aerie teyeratste.. -lh e.<,editiests e-terteA will tkose ca.u.ses by a_ 0. /5 f*t
- s t eaa.
a.pp t exisai e. tai, sia e. stem beer.k to ele. brea.k . be.torys internehrte. be4 a.wiede.r-e cra A) wyo ey . An EBA results i,e kyk dry w ell tey er a.+ure c.eadHieoc s whiel e ey u.u e a.du.aktu a f cese+Um Sfeey kt etiti adr* cit A r E8 A a.ls o /*esuks iA. the. AyJ.e,r a.xoly tae<J dpuvete. /oaA.1 an. t<e. to e a s stine u., z w eo etty we.Il ye e. s s y e. te lie f via. +1e. dowru euter s <* yra.LanlG f* lows (,dia L ,e. e. e.okd r e. to a.Agip). ine.reasiy TBh h.ve. beest exwively m (yzed auL cru f
221 fre e 5-NEB '830318 s er w a./ aadineariors sa.de sp-edie.1/7 for ae.
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IB4 a.raly tieal load s . Evau ,,iek rf e. ca a s s tea.ete r rl xadificatibn s in. a- p ar+ia./ly a.l/ isf fe m ted. seade (a.s fee.serr/Y u is+s a r. w
*dt ec RA it S ) y c u u. k AC di[[c.At/ ors dsumm- d e.t/t.
<.e kie.v e-cl te wi+ b tc.<.cl re4 < val p eiea./ fondr.
A-rica rep ares ec n;rja.ee u IB A % ben w -(/ definet . 1%s 8FN is desijned fo r a.r d. e l e. ap e ea+.t s a.e e e raie ed r, <>+ ,y <f IBAs. fr <. v a.l yz e d.
- o. e e- two ke.y differene es be+ ween.
m [BA s a ,.& s +en. r e.ter s e. ra e-Ae drywe// dne g +o a. fail.d v a. e.w w a. br e a ke r valu e f d EBA s a. r - ass a el to 4e ye<na.,-+ kife-
^E a 3R v c-a L e. ~h <e c ta a ed (tes a. s calaffe.
5 L e - a h) , ud. ,
-$ 2) E8A s t e u. is released direce./y e vi,.
--a drya e // a+ no syk er <- wLeie e %tu aiseAarye s tern e.xpa.r.d s ise+= rie. ta.i/ pip e. axd tM ine tLe. etry we // vie +ke fQiled va.ea.a. dreak er
^
va/ve 1% s/,jb/y rekee , tie. ro d .a.erp y y ted s ele i arpal < sop.2fte.s differe nee s + end +a na.ks +Le Affe d 4 vu wo. beeake e case /e.s.s s e v e., e tAar u TBA. Ho wev e r, if a a.otte r vaew u b res.her v<.lve.s or a tv= s frJ/ed tLe e ue.r-t , tAe n Ja.t in$ s es u e u
= c-oa./d- b ms.d <,s ec it.s e-y we.e.e.e s
+ke'^'[BA. In ny ea.s e +L e. faifel vae w un.
beesket wi+L pro /cyad SKV set Ain. is danoded.
. ww 221.
NEB '830318 by am/y se.s anL is witAir 4 capa.M!y _ exis+iy/ rLe ef p aa to xitijat e . [f is wl$a possible fer the SRV to sinre y a.c a- p;ven pre s s u.t e . A sonstasct or nev _ eonsin.rt valax cf s+eu. wi// Ja ee/ea,eJ ir a.n n x+.s m ae A. less +Lu. fro n a. faJ/y ope.n. SR t] . U ekis scea n or a partii,t of iv >> r e. /=u<J. to sk- elepell aia. a. leakip or fu.i/e/ va.c.u. a beerhee valve., tke e.orseyu. era.e., a., e. e. < e. A. le n fa fly opex SA U.
- c ea.n
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t-ka,e. For *fA* e. se v e e <. a.
-- wi// 6 e. e.e nel e.rse cl wi+Le a aeJere.r/o g.s sa.fe.sy j j eonseyaer es.
//ewev e , e.ortinge.d p/a..cc epvection as a.y b e kinde r ed- clu.e- ,e-e p r ada. ally tre-reas/p Arywefl ptessuee a.,tajo f 1*a.e 4. Sp ee-. / hiss a n.
*f'A i s +yp e j r lea.ky e. x sid - prixary ecxinixre.itt.
e.veret clicl. oe-e.ae o se uit / ie. oely & /ruay
/763 For the fail wee acde wkere c k <. eLis c. separete,s hos ek<- /t iry c. a. < n , je is con ecivad/e 1Aat
-tke dis e. eon /L + < +4 e- w/pi;oe. H ete foes e.
eli s c. sett /d ir s ae.A. a. w e.r a.s ce e ne taase y.r bc f F0f1*llck by a-
$kbr5c.yaext disc-fae e, it ce 4.l0-rLe. sm ud b eccs e. a. mis,;/ witAir e d s. t a.ite n .
E sa an i,ttern/ mis.si/e en id prodwe ispaes hads clue to inyipn ea az yip eJ/>ows , espaeis/?y if a< e-lice is a.t the e<d af a fe.ry t/.y Ant hor / toe.] r s t. . A loose. eli., e ceald eos.xcualf <.ortu tL e_ .
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221 54e
- 7 NEB '830318 L.ee it wealcL eken c a.s a n<. . Sjoe./c e_ o.f _
-f*ysenk.=.r ite les l0 0 se. disc. w e !ck sof pre s eA+ a.
f= yatu.4e. t b y a. pre blem. as the vsse rAjority of the stw wo (d. fe ank an 1 de Jrpell. The iycu.* loaAs Jae to ),.piy& calcl da e_ _ a<.tulpe y aut raf ipe f ,apporo ;f ele is.)s vere very Ivy. na a.rs e o. as e wy -Ja s ra,cac<. J a- wi p,pa. .s ide. t'h' forsi sirsf1C t . $~ueE a. rnft arc ~ coslcl c.r este- a s e r e/ *. Ioadin eeditis n 1A*. eor u otraetar - if eks Sg v w
- e,lo s e a.n J. toe a s c.estalwxt spia.y as aut acmee 4. to r/m. turns qirs e.u , je.as s<.or er s c.cn/t Ase- the steaA estati
<W ritis esse ~oa.tk be. e ce tha. tev/ppe. sap,rart.s dat weall Ind te brily y<- shrotrekn .vithea e /rss o f iatteyri+y. Wrile tA= t% /p y e. vaali no /9 c.t &a p liRed a ut e., ea a llo s a l /~.-s , presu w o . of prassar La udary
+o r a s s erarv e wo~ll suc-irrep ri+y ~,JL answee che be. d eck eve ~ ;/ f.e che,- SXVa<x eko oe.c.gerd.
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l 221 "*d i tiEB '830318 en ni pe p c. +re 1:y ~~4a. , ait/ a.1f.ee a. /c , a due . __ v R As st tes errfie.r ths majority of +Ae SKYJisckarye sm l- will s++nt r-A*- dry wedl. 'I'his r esu.e s t-Ae st ee r flos/ tha.t- .*Ill - I fe c + *.!cose dis e. . Sirt< c H e d is c Ars
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[ will e er pr. seat a orfety yto Llen . _ fn sn m ery a.// fei/u r .- eersep. .re< s dwri wrst <4 j , tree.sicc pt w -ediHou o.e e 6 cud cA by ua/y a e.d. i l e e ees s . Ho w u -r, cAc eens perees a f ~ seta k opes. i $A i/ a.r e. inc.re a,s e.d- // exe. v e u u a bre4 Aer va de A//s [ oper. Also, eke- probo bi//7 ek s d.ry wel i// v p < tie.n c e. Aiyh. ee.y<.rakse. cedition.s a n d. 7844/sadips i.s iu.c = s = = 1 a. s e A e- //Ae/ibo4 / a. .re. k ope 4. 54 v wick ILiled. v e.uxx 6reakw va./ve is kiyke.r tAtA. a-( pip 4eealt et c.ritic.a) c..t 1.e.k . iL failur e CL<im k.iden- Cudpicas
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NEB '83 0318 221 suainj s. pape4rea) ;a side. the cuy we// tAat- is o f e- - j' ired size. Skerrm. e f stea.^ ;<+o rke d ry.,s // m a h,'fe$ varnss- ben /st vrl* e- wie n. tke. nssee iat-ed .$ oft / is oper y eed ae es art e ffar a-s tAoupk eA e. pipe 4r caA . site- Aetyes- Si e7 0 plc, a. n '9A coa Jeun.< c^ 1~!A a u l A a.<. retmen es as sSA wkar an . fell opu.s ud. e,lo .re s . tac e fhes s f t-fir A a., ce W ine luled. in (
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; faeees operirj t-A e vneaan- Jeep.A'u ea./oc.s inc r ease s Jn,y $0A/18A esa&M eke- vafues bees-e. <<e- t,Ae/y O fail auL anay fetll -wk fe-es S&V accatica s). For egayle, as S6A occurs . Vyer cert <imc.<t ise /< tion Serv a /ife at their ytessure serpelives arcL raset . A va m brerAer valv e. fails darity this. Sulsepc** SRV ac.taatiosa esca.t'd 18A typs auli+'hs ke toYfaile<L ousa- he</<er rafa e- e. < d-4itss ~.
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NEB '830318 11e erns r espro as e to aot 764 is ao+ m da- swore. seve r e. if _ [ es se.M Nng SofI' rads aor e steas to ac ettp, e. //. fA t-r wer e e o< se- aa/pis stiff bouds dis cre d . No otAe r el ped uerra a r a. nad e ass e s e vere. t M M e norst [ ease us/pir d u e +o racu s~ 6teaker va fee hi/n ee. Th-t cLey aeff pressaier+ier , redet%,n ja m f/*v n Me _ fpercku of de failed vae u m b e ender v /,- m;/y,pe , I n d. . itered dereal lod were- all considered. stree. r .,-tm j= t-k a s,Mtiers enside < e et , , e. u y a fyg e_d , d ,_ , ! !~
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= worse. du e +a vac a n bre-ake r value. /qi/ure .
E Co^e/.s/orz d n' +<4fiecl ceX asosa brerker ee/ves will aperieu.e.- Ja a wie.never SR V*s n eaa te<l,. d Ca-<je scewla h s Jek sddMesa.] Si v a cka.W e
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- pr . .. TENNESSEE VALLEggpfHkRI 5 CH ATTANOOGA, TEtiNSME*E Shkot 1750 Chestnut Streec Tower g S '. O O June 30, 1983 Mr. James P. O'Reilly, Director U.S. Nuclear Regulatory Commission Suite 2900 101 Marietta Street, NW Atlanta, Georgia 30303
Dear Mr. O'Reilly:
TENNESSEE VALLEY AUTHORITY - BROWNS FERRY NUCLEAR PLANT UHIT 1 - DOCKET NO. 50-259 - FACILITY OPERATING LICENSE DPR REPORTABLE OCCURRENCE REPORT BFRO-50-259/83007 - REVISION 1 The enclosed report is a supplement to my letter dated March 4, 1983, concerning unidentified leakage exceeding 5 gpm following a reactor scram. This report is submitted in accordance with Browns Ferry unit 1 Technical Specification 6.7.2.b(2). Very truly yours, TENNESSEE VALLEY AUTHORITY e f $8//93
- H. J. Green U Director of Nuclear Power Enclosure oc (Enclosure):
Document Control Desk U.S.' Nuclear Regulatory Commission Washington, D.C. 20555 Records Center Institute of Nuclear Power Operations Suite 1500 1100 Circle 75 Parkway Atlanta, Georgia 30339 NRC Inspector, Browns Ferry gvCh00d
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