ML18100B085
| ML18100B085 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 05/10/1994 |
| From: | Miltenberger S Public Service Enterprise Group |
| To: | Martin T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML18100B081 | List: |
| References | |
| NUDOCS 9405230274 | |
| Download: ML18100B085 (8) | |
Text
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1f Cr:* l'1~.;iUl."1I M'ld Cl:lll' t.IV( CQI Ofioer Mr. !l'. 'JI iaothy llartift MAY 10 1994 na-***011
~a9ional Adminiatrator United. st;ia-t.ei'.irualear ltegulat:oziy CODi*a1"n Region l 47.!S All*ndale* Roac:l
~in9 ot Pruasia, PA 1940&-141S Oetlr Mt. xarcina RlllQUl:':ST FOJl 8UPIJT.KllBll'lAL l:llFORJ!l'l'Iotf SALEM GENBRATillG 8~'1'101 UNIT NO. 1 J>OC1tE!' HO. so-a12 Ry l*tt*r clat:ecl April a,, 1994 (~~* WLR*ND4014), ~lia 8ervice El.ect.2:ic fl aas company (P8.l&G) i*ued a letter outlin~ the action* to ~e*t*ken.. a ramult of 'th* inv**tiga~ion tai~o th*
Ap:r:il ', J.9'4 sal* Uni~ lfo. l naotot:- trip and.arety injaation.
The r*faranc.a letter omaaitted.PS*&Q ~ provid* tldditional inf.grmation relative to tbe pover op*~ted relief valvea.-*1:h*
pressurizer *ataty valv.. ~
t:h* ***oola~ piping atructurai intagr 1 ty *
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Atta~ent 1 to thi9 lett:AX" ad<<re**u the hardware !uuu, oorreotive aotions.. stat:u*, and Not oau..e clat*E'llinatian! if nacaaaary, for t:Jl* powr operated relld *alvea, pn**ur **r-.l*
safaty valve*, and usoola~ piping *i:~gt.ur*1 ~1tr. ft*
attachment d.J.eaasaae* th* appl1oab11lty ot thaaa !uu.. to lal*
Unit No. a, if appropr!at:a. Pl*H note tbat all tra1ftJJ\\9 and procedure chant** 1Gent1fied in AttaCllment.
- of th* a.pi-il 11, 1994 lett..r are ~liaabl* 'to Ito~ Unit 1 an4 unit 2 an4 bav*
been completed with ~
exoeption of' lanvar: ten OVn*:r* Group llOP iaoues.
Tn addition, Ai:taalment 1 oonuinm
- 41mow1*ion ot; the *t-flow instrumentaticn di:'ift. probl... tha~ baY* oaaurred and tba 11inillua shift campo*ition 1'9q11lred by ~*ahnical 8paai~Lcation11. DUl'in9 a telephone conversation betwea PSUC and nc Rag1on t pancmnel*
on Hay 2, 1114,- PSlaG agr.ed to pi:oYi~* lntormat1on relative to steam flaw 4ritt. 'l'b* *hift oampo*ition 4i*ct.19a:l.on l* provi.494 a* per you~ requ.. t o~._y ** ~114.
9405230274- -9465i4 PDR ADOCK 05000272 lA PDR t '
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05/10/94 14:20 u.s N.R.C. REriIL1'4 1 KIN i>oeu...nt Control Deak 2
Nr..R-ND4089 MAY 101994 Sinaarely,
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c Mr. J. c. stone lJ.oen*in9 PrO~ect llana9*r_- lal-US Huolear lle;u1ato.t'J' Colmd.la91an One Wll.1te Flint NDrtb 11555 aock1ri11* Pik*
Rookvi11e, JID 20812 Mr. c. nrlClhall saniol' Ruident I*Jeator
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f Mr. Xen1: 'l'oaab, llanapr xv
- New Jersey Department et BnV~..... ntal Protection Divi*io~ of llnvlronaental QQ&li~y BUH*u o~ 11Uc1*ar Sftg'lnet~inv CN 415
'l'rantan, HJ 08635
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05/10/94 14:21 U. 5 N. R. C. RESli:l-1 l KiN HLR*N94080 I.
.J'pwoa:= op*r*tM *111t y1ly11 RBYll Although th* POKV* tunotioned aa de*iwned durinv t:ba april 7, 19St4 event, tbe¥ v.r* aub9equ..nt.ly d1****mm194 net ln*peotecl. l'allovln; d1***-'>ly ~
canoe~ were identified with ~- PORV**
Both 1ft1 an4 J.PU eslaibi1*1 orcac:ikln9 on tha p:lnnlnG ba* Vh10h oonta.lna4 ~*
anti.;;:t'Gtatlonal f!:* lPD bad galling a-t ~* at.a encl bQth
~alvea 11*4 *ourr
.f.n tba PlWJ an4~ca9*.ar... A detailed root*-cau** analy*.l* vu init.ia'tad to *aclcb"..a all GOD09m9 with.. the 10.ltv*..
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.cracx in the P1nnln9 Ion (101 u4 11'12)
.... ~*
'l'he a:i-aak* in tba pim1.1nt bOtl* ware clet.rained t:tarou;b
- t*llographio exninat!Dn 'to M.t.ntargnnular atrea*..
aorroa:1on araaking (IGSCC).
'l'h* *xtant of oracJting waa aillilar in 1ftl and 1PR2, *xt.ndint trGlll th* top or th*
pinning bosa, aboY* Ul9 anti-roation pinhole and oontinuinf down 1:0 ~u.t: below t:h* ~op ot th* plUf.
'lh*
crack 1n 1PR2 vu about 1/161inohlhortarthan1PR1.
~*truat:Lvo exa*:ln.tion of 1PR1 wa* PtrforaeCI bl' tbe weatinghou** lleatrio C'Gzirc!'~*~on sot z.11. a. reault:11 ot th* Mtallograph!o U1U1inat1onm of th* ar~cted
- w9ion* Qowed that t:b.e oraokin9 ~ollow.S i~anular 11a~oloU. De :results Of tb* fractactta>>hia exam:lnation11 oonfirlled i:ba* or.ok tnitlaU.an oacurHG at the top and bOttaa.urtam looationa of tU pinbolu and prOtJN**ed aut:wan Ina -. pinhole* in tbe collar.
'Di* rraoture appeared flat and*va* oovered with an ox id* layer.
'!'ha cmicSe,,.. b.-ry at tb* oraaJt JIOUtb ngion and ** vuy 1l~t a\\ tb* onok 'tJ.pe.
l'be abaena. of beach~- lmUoat.dU.t a:r0110 loads did not play Cl' rol* ln tba aracdt provrt1alon.
St-1:*** aft4 ~noture Mallania* ana1yau wra pertor.ect.
to.va1uat:1 ~
- ~* oon4itJ.on.in 'tha val.ve plu; and to ****** tha J.'\\Ot*ntial to~ additional. craele 9ZOW°tb*
The at* va* ~lfid u
'JYp9 31G etainl....Uel and the pluq ** tne 410 *tainl*** *teel. Stre*H* tn th*
PlUtJ w*r* Ml0\\llai:.9d fol:'
- uni~na t_,.ratN29 in tba
- t:n anc1 pl.Uf or sso*r.
'1'be n.ulta ot th*** an1111:r.. *
- bow that: 'th* d:l.~r*nntial. ~1
- xpan*ton o! tb*
st** and pluG cause *lvnitioant *tr**** in th* pinning bo***
r.n ad41~ion, ft.a.batallatlon torq&ie and pinbol* *tru* c:oncauat.lon reault. 1n tot:al hoop atn-- Gf aw~ 100 U:t in the victnity of the anti-rotation hale.
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NLR*N,408, Attacha~ J.
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l"r*oWz'* lholaanic*'oa1auJ.at1oM ware partoraed uinq a tvo-cSiJMnaional plane *train.adal or ~
p1119 near ~
pJ.ftlit1t9 H8** ne *U.aa 1nt.maity factor wa*
oalculate4 rar a r*ftlJ* or crack *i*** ~o:. tile t:h.--1 expan*.ton load* an4 tlUa *ta prel,oa4. De aaloulated atresa 1ntau1t1 faaton ware aalaula~ dii'eotl.7 in the tinita elaent ana1Jaill baaed on aalcalat..S di*plaoement r*IUlt. nar the aimulat:acl -.o1c ~.tp.
Alth~ugh ~
- tre~*.. lb tha Pl-... ~r.daaraaHd
- ub*tantially aovlD* away fmll i:h* *~. t.b* *tnrs*
intenaity faator (IJP) 4ou not deoraaa* and nuins rairly oonatant *. 9* caloulat..s** an**.-.ra *t or aboV*
tha tbnab.ald, t.hU'*ton aontinil8d*oraoic crrovtll its posalbl*, lr left in auvi**
W* Ila~* aonoludad tbat the tnr:i~ oon~igQZ'eG 4ZO atainlU8 8taA1 Uim A8Mllbl1U Wi11 l)a removed fram 1.PR1 and °lPRa.
We.aav* initiaud a duivn oban;*
pack.tge to re-1natall tri* ***-.blt.. *im11ar to th*
- aterlals utiliaacl prior bs 42~'11i:ainl*** *~*l (3~f
- ~ainl*** *toal *te1lit.ad plag *i~ a 17*4 *t&inl***
steel eave>,
8~ting in tb9 Pluw *nd ~* (,UIU.. Sl'l\\a)
'rhe >>ORVa an an air operate~ z-etw:a, *inlltt Mat, unbalano.CS plug, *ca9e 9lob9 q.pta valve.
M tbe ca~e 1* d**t9ned ** a ride tor valve etroJd.nV, tb* *aut.tinCJ oonclltion m no totall) unu1M.c1t:ad clwa to tb* Lntan~icmally tight i=ol*a:anou betnan th* valve body an<< all intem111 parl:ll.
fbe t:1pt al.aranaa and t:oleruce on tbe pJ.d* 411... i:ea:. aambined with n..
flexibility *llon tor *lid1ft9 oontaot atveen plug and' cage even nncte~ low aide iaau.
Dhlenmional llAllt'&UrG*nta o~ bo1:b va1v* t:ri* **ab1i..
ware taken and oampuoed qainat the valve mnUfaot:urinG clrawinQ*.
1'119 41Mn*iona1 data ware pnera11y within all. anufaot~lng tcl*rancu, aa.pt tor two in1icl*
- diameter (ID) loaa~ian* for 1Paa aa9a.
~n th* *~ of scuffing, 'th* oaga tD wa* Mtw*en 1.s t.o 1.1 ail* ~
- ize oompaNCI with Uftuta=uing tolennoe. 1PD PlWJ ancl aa9e vu. not destnctive1y emlned... bel1ev*
the aondit.ion l* *lt:ber a 1:'99u1t: ot out ot to1aneaoa aaahitlin; or lftoreuad tbiaknua clu* to t.ba *cuttiDJ (aateria1 dapo*li:ion o~ enption).
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llLR-N94089
.u*.tacmae.nt J.
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B* v.a.r an J.ftll. was ** -xpectea. 'fh* V..r on 1PR2 wa*
cireat*r i:han normal and waa aoat likaly du* ~
- variatJ.~ in :t1*14 **a.blv, the po~at.lal out or tolerance JD o~ tb* oapi f or th* Dr*-n.-* ot f'o:reivn.
aatorial. *n*G na* llOdit:l..t ita inatallation proc.a.uras ~ PZ'OVide tn*tar ***uranae of.aooi:bne**
o~ maveaent 4'nd imp~ecl *1*11 ***ambly oanter:lft9.
'l'o veri.t~ the acl-iua~ of t.b9** OhanQ.., 1PR2 vu Rl'okecl ten (lQ) tiae*, 41nas911bl*d and lu>>ected.~ Bo ga11in9 or **acunu9 or any wear ~
vu to\\md.
Dur!nq l*l* Unit 1* *1.venth r*CU*liq aab9*
(~a11, 19f$), th* ll'll111114 lta2 valve tri* **aellbli**
ware replaoed via a dHifft chancre.
'l'ha ~- of ~
ohan9* ** to provicla J,mpraved ~ar and gall~...
resiatanoa of int.*rnal Wtt partm.
~* **t.Uia1*
in*tall*d.tor internal we*r paftrl (ca;* and plug-) ver.
420 barctenad urten8't1c *tainl*** *tael. ** *t-waa 316 atainl*** *teal. l'he chan;* inaorporat.S the valv*
manufacturer** prererred aatuial fer aev9"1 SU'Yiae applioatigna and ha* Meri Wied for av*r 20 pan in comnaroial applioatlona.
oa111nv at t:.be Sta* (11B2).
'l'he *tell tiallltMJ wa* dWI to th* tip~ olaaraaat1 bewaen th* *tea and t:.ba >>onnat *t. gulcla alonv with varia~ion in rield **Amblf and alknunt of vaJ v* inhmal*.
PS3M: ha* ao4ified ii:a iba~allation prooa4UZ'a8 &a reduce the ~1b111tJ for aiaali9ftH11t.
PlllG bu raJ)l.aced th9 1n.t*:ma1* ot both PORV11 wi'l:h nav in~11la u*lng th* improvecl 1na~llation pi:oo9duea* and.. thod.a.
In adc.titioral NBN pttrfora9d *t~ka t:a.At* or ene of t:b*
PORVa oonta ntnt n.w 1nt*rnala.. tfbe PORV wa*
di*aunbled for inapaotion following t.b* *b'oke t-.e.t,.
Jfo wa11.µ., o* notee1.
'l'h* JORV vu r*u*eblecl uainf the reviHd pi:ooecluru.
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Unit 2 POIVa HBiO haa deterained that 17** atainl-.U.1 valve t~.i.Ji:a uaeu11.. are imtal.1911 in Unit. a. ** 17-4 stainle11* *t**l trill u..abli** *N *iallar tso tholl*
which were :l.Nltalled in both unit i ancS a at tJ.M ot initial operation. Valve lnapection an4 poa*~l*
\\lPCif&ad* are &Jlanned tor.th* Unit 2 *iVb.th nfuelinCJ outage aabecluled tor Pall 1914.
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NI.R-N94 089
.Attachment 1
- i1. P.:**aurt**r sargty ya1y11 {1PJg. 1Pl4, apsl lflt5)
Tailpipe tamgteratura11 ~or 1PJl4 lncliaated that th* valve had
- illlllU"H dur:lnCJ tba t.t.M P*riocl the l'ORVa.,_..,alt.nv 1:0 maintain pr*awr*.
PIB'G moved 104 and *et t to a vendor tcr a **t p:re1IW:'9 UMI **at laalcat* tut*** 'lb*
r.. ult* or tb*.,_*ting indioa'ted l**kav* at th* 90' litt settin9 and th* Ht pr.**ura *liall~ly. abov* ~o zi.ciuirttd
- tpoint.. l'al.l.OWinq. ratw:bi.-ent by the.~vendor, tbe val v*...
- performed bOth.ta*t* aati*faato~ilJ.
Rased on the bllt n*ult:s ot :l.ft4, PSR~CJ ~ed 2.Pa:t and.
11'1\\a tor teltillCJ.
1PIU parto~ sathlractorily for both aeat leaka;e and **t pressure i:e8ta.
tPR! P***-4 th* -t..
l.e&U9a teat aat1atactorily, but: the mltial *et. PH**ure waa alig~tly abo'V* th* ~Cl\\lir*I a9tpoln~.. 7o11owing rttturb1abllent by th* ven@r, t.b4t ll'RS pertormecl both te*t.
satiafa~::tly.
During-th* April.,, 1994 evant, th* pra**uri**r **t.t.}'
valve* rwiatloned aa 4-Lp.cl.
Ill
- Riping S1;Q1gtu;*1 lntlGJ.Ji1 A* a roaul~ ot th* *olid plant oondlt1ona that oocu.rred durint th* event, tb* lmtV* ti*aharted *~ t:bo1r: **~.1nta to a1t1qa~* over-preaaui-i1ation a~ th* Jtaa.ator ~alant ayatam.
The operation ot tile PC;>RV* re*uJ.i:94.ln
- di*ob&l'Tj* ot fluid froa th* PJ:*asuri1e to tb* Pra*suriaar Relief tank (bT).
The piptn9 and nppart* nra evaluated for loda uperien06d during the event. InolUd*d wu. ~av openinQ and. cloaing timea, mmbar ot oyolu, ** nll u fluid tapuat=u an4 presaur*, and fl\\ll.cl aonclitiona i.a., water, *~ and two pha***
'l'b* d8taine4 rMUlta or this evaluation ue aontainacl in an envtneerinlJ tWAJ.ation.
In addit:ion to i:h* above, wea~tnfhou-has evalua~ t:bi*
event tor th* ~awri1ar and no1al***
i:t Ila* bMn detem:lned that t.bt. ev.n* i* boundad by extat;inf Sala com.po;;~ent fatitua an:~*** or i:baa analy*** done on other westiu;hou** plant.
iltit1n9 *~*~lar KISS %aatur...
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"""9Gllr* Of l 05/10/94 14:24 U. ::i N, 1"::, lw.
~!UN J.,._!N
.to.aR-N94 oat
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- A n\\lllb9r o~ '"'lkdowna wara 119rro1:1aed ~r ao.ben ot snqineerJ.ng a Plant Bet:ter.ent, I1111*rv.t.ae rnspectian and Quality Aaluranca..
Aa a reaaul't of tbaaa walkdowna, DD c1~aqe or excea*ive pipe ~t
.v** obaerved. All pi1Jin9, r1qid eu~a. *nublara and anahora WU"e ob*arvtld in t:hair aes19n po*itionm.
rt *houlcl be.....QOtecl uo oonatant aprin~ *upport* wen round with bent rod* (C-PRH*14S *nd C*Pltll-14g), b\\11:,erabl*.
uowev.n-, thue aupporta are adjacent i.e., bro Ht frca11i six-way ra*t~aint.. anohora e-PAA-~4* and c-PitA-110 rupact1vely. Ko daaap to pit!;' or the uchor* va*
observed.
Baaed on tba** rind
- ve bav* concluc.tecl tbat uie bent rode an not a ruult of tb* April 7, 1914 event:.
'.l'h* bet1t rod* vua replaaad tu ~tore th* *UJ>FOrtlt co t!Mir de*1CJn conclition, In aumnary~ baafid an the ruulta ot*th* pip!.nt *Yatea evalui:ion, t:ba ~t evaJ.uatlon performad by W*at:lft91loW1e, an4 t:b* syatea walk.down*, th* PORV and ntety valve pipinq fraa th* p:Mall\\U'ia.r ~ 1::11* PJl!' waa anG l*
structurally adequate and ti>* ounent analy*u lM>Wlda th*
- v*nt* ot April 7r 199,.
Ma ;l.n St** r1w tmtwa*n,at;,1,pn Rt&_c Sal** ha* ex,perienc.d d&'ift1nt incU.cat.ion 1n tile Kain Steam.
tlaw indioation that bas requJ.red ra*calil:tration of th*
eiqht obanD*l* par!cdLoally.
Znva*ti9ation or the anoaall**
datermine4 that incliaat.94 drift vaa not a nal ateam tlow..
Upon pr*vf au~ detalle4 *xaaination or th* plant prooe.sa para*tera, U:
- va* det~ tbat lnatruuntation tub.tnv routing.:la a 11!911i*toant oontribu~r to U* prol)l*, PUIG ha* po*tulat*d that tbi* dltiftin; i* due t.o 9**.. b9~
trappec! tn th*.lnatl:'UMfttat£an t.ulJillljJ.
'l'll* or-1v1na1 ~inv wa* not. deaigned or iutalled in acoordanoe with UHi !low
- a*ur*Mht ~nt.. ~ eliainate t'll:I.* proa>>la, NB*a baa in*talle4
- design cbanae 1n Sal* 11n1t: l tat 1naluelad tbe fa11cv.ift9* 1) un-.t.uulafed, larv*r ti:O~h**te pot*,
- 2) laqer tubing, and S) re*2:'Gute4 1;Jlbii1CJ in aooordanoe with ASMZ atandarda. 'lbl* new oonfigurat1on abaul4 eliainat* th*
trapped 9'*** and enaure filled line*. lfbe new con'f~a~ion ba* produoecl 9ood nnlta for a liai'bd operating tiae paria4. 'l'ha &l**itn chanG* la planne4 to b*
inatal.J.ttd on vnl~ a 4Uring th* Mxt ntu*linv outav*
toi1aw1nq a canfiraation ot the l'eltulta on Unit 1.
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f Nf..R-N94 089 Att.achment 1
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f!iniplll!I 8h1B CpGplitiQD
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The aa1-Tecbnioal 8peai~iaationa (T/8) requi.t'9mmd: ~or the miniawn *bi.ft o-e;-o*ition for bath Sala wait. OJtU'*'t£ncj 1*1 (A)
'l'hrae ()) 88hior baGtar Opera.tons (SRO*) wb.lob tnQluclaa one Senior 11\\lOlear lhift lupervlaor (UIS) and.
two Kuclear lbift lupen!aor* (RIS).
- i~*ll' of "Wa* t.wu N8S gan ~uir111 tbe ~lft ~ical a4YJ.110r. fUnation.
(B)
Pour (4) SUOl*ar CDntz'al Gpefttow (~),
(C) one Shift ftc:bniaal Adviaor (ftl.) ir not fU1fil1ed **
- tat.cl abov*.
In aumnazy, eaab unit ba* t.vo (2) MCO* ln ~* aonvol rDOll while in 11oaaa 1-.t. ftay era *aparvlnd ~ on* (1) ass (SRO*lican1eclJ, vitb tha bas (8ROaaliaena.s> hav.t.ng cweca:u.
re*pon*1J)11ity ror both unita. An STA is al*o lnalud-4 in th* ainilaua 8hltt caaDO*ition and ar be ono af th*
&R0-11a*n*ed au~zviaora.
Lic*n*ed operator *hm1ator training baa deaonatrated that all De*iCJD Baa1* Acaiclent*. (DBA evaat-9) and op9rational.
tranaiants aan be *uco***fully ait:ifate&S vi~ tb.* ainilaWI shitt cas.poait:ion d*cribecl ab~ *. 'l'h*~~ore, till* Pf.'99*nt1y*;.
requ1rad hobnioal Speoifiaatl~ i* dHMCI w be adept...
Tile apr.t.1 7th.v*t *** 1nitia't9CI "DJ th.a unuaua11Y let*
ucunt of p-u* that aaowmlaad an th* ainuiatin9 water travelling acruaw. !D.* r.*uU:ant down power 8houJ.cl have been aanaqad effeatively with >>rope& n*ourca mana9eaat aftcl diracclon from*tbe HSS.
Aa dlaau**ec! at our... tinrJ Oft May 1, 1tt4, tb* llUllber or,.rMnne1 l'e*ourcea *- not a caµ*al.faotor of thi* event. on. ot th* *in oontribut!nv t aatora wa* how tha n*aUTOaa wen managed bl tt. na..
uno.1ear aouunication**betwean tbe on-ahift pa1"90ftne1 and incorreot prior1t11aticn o! ~Jcm for ~* aon1;ro1 rooa penonnel van contr~tor* to thi* tr111nt.
Bpeoif1oa11y, th* 1188 daol*io:n to tran*e*r tJae pcup.,_. limt.ucl ol' manually trippiftl tbe aaJ.n tumb* wu nDt th* proper utilization of naourau *~ 4:hat _,.... Act.1: tb* went, manageaent expaatatiou oona*rn$.bt l'Uc:NrOe *nq~
and diraation of D9r90nttal vera &"eViewed vlth all 1ta.n9ed abift IJ$raonnel on th* *iaulator. lev-nl recent 9¥ent:a i1W0lving rapid power reclw:tiona dua to ciroulat~ Water Jm*lm bad been accampli*hed suaoasatul.1~ by other 8b.1fta inoJ.udtng th*
- removal of the unit from *en.ice.
NBIG be1i.ve* cnac th*
present requinaent for tha 'l'/I mnhnm mift ooapo*ition i*
approprieta.