ML19241A659
| ML19241A659 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 04/16/1979 |
| From: | Goodwin C PORTLAND GENERAL ELECTRIC CO. |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| REF-PT21-79-115-000 NUDOCS 7907090245 | |
| Download: ML19241A659 (4) | |
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la n.iet e rni nad that a delicioney usy enfut in Ll ? I c:pel lei.to.kunt d ; rsll,t.
19' c nc cop tai nr:ut st ray p mp at tr e Trojan lit <: h a r 1laut. The: a It: a r,(crial f or the 1.i.pe l h i t r.c hnu t s t o loonen.
Is loi.knun loi snuing cecurs, th: ia; e1.er J ochoutn could ecw.: off ti.e shift a n.1/ o r t.h e imptller eculd eni act the, eels c a s i n ",, either t.f ul Leh may lead t o petsp f ailure.
Th te puript, ramtiactur.sl by tiu lu:a rroll-Fand Cecip.iny oi; Phallipsbuty;, Neu
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< c airsi.f.o. Jn det.ign ta the Trojan Renidual licar lie::. oval (Rill)
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Io 19 76, doi log na int enatice ( n an RI R p';mp, t he iu l c l..'.c 1.
lcchn st wa.;
f o.a d t o be locse.
- ?ubsequently,
- t. he irapeller out locking dcaiga vaa mo !ifica en l eth R!!P pu pps to provide a posi tive tr.eebanical lock, iristead of relying to 3cclnot toa que which providen only threan and tuu iriction t o prevr.nt pet-forniint; a uica d ar impeller locknut ued! ficai.f ou en cu<
J o t e r. r g.
'.le are cmoainneat spray puups.
in l a v.- a b o J e.rroed
- t. hat loosenin:; of aimilar impeller lockant s aan becu t e;.c r ted by otber nucleat plants (i. e, Si gr.ifica nt Ecficiency Lepott by
/ r'u r ',a t -1 on E;ty 9,
'9/3 and LEM /3- 02 3 by Oconea-3).
bacenar of o ir in:<Itaint'j as to 6.:thez lbc. W. had be m adeqcc.tcly ir.fordad or thic i c etr.t t:1 renet ic m;oblen. w are r.nl iru: this renorr ire u r n r a n. <. vi i h 10 LFd 21, A!.tached pleat.c find 10 CFR 21 Report No. 79-01 au requiced by thh regulution.
Siacerely, f.
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C.
GoodA.n, Jr.
& sl u t. ant. V lte Fr au deat.
1 ! c r: r l l'c. n t Plent Opniarar. <; ne..r i.:12
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I.cr c r.t r, O f G c c i f hispec 2Or.a Eu, c rr.cn t n'
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oi <ctor, sta:c a: oregou, a:s crocur e sunegy 2007 9
M8 309 254 y arqucrted:.,Um,c..
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10 CFR 21 Report No. /9-01 Page 1 of 2 3 0 CFR 21 P'. port on Pot out.ial Coat a licent _Syal P_u,wp f rapel] c c I.ccknut Desigr. Imf iciency p
J.
Individual Informi.p u.he Co cu.i_i n n i o n_
E" Mr. Charles Goodwin, Jr.
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As::i s tan t Vice President 7~
Thotaal Operations & Maintenance
(,1...;
Portland General 1:1cctric Coupany q.;p D}
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121 S. 14 Saluc,n Street Portland, OR 97204 Phot >e:
503-226-3181
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% [e) 1, Pacilit.y and Connorent Po t en_t;jalJ y Conraining ebo nefoce F
y A.
Facili ty :
Trojan Nuclear Plant k* Q B.
Cortpo nen t :
Con tainme nt Spray Pumps f 1 P. qui pe n t Noc. P-204A E B
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g
. "1 1,
cepms cup 111<.v g
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Ia;;e rsoll-Rand Conpany J
C maron Pump Division P. O. 1;ox 486 Phillipsburg, NJ 08365
/.
Nature of Potentit._1 Defect The potential exists fo r the 1.apeller lochuuts t o loosen, el lowi at u ne iapelle r to contact the punip casing which tray lead to pu ap failure ;
hacever, this condition has tiot been obnerved for the Trojan ( catt irca a.
spi sy pu ups.
I!a t e_
s.
The Nuclear Operations Board met en Thursday, April 12, 19/9, to d Lernine whether there was a possibility that a deficiency cristt.
Baned con ibiu centing,, a recocanndation was rude to the ret.,pansib3e corapany of ficer to report the matter even though neither the need to raport nor PCI:'s responsibi.'.ity to report uere clearly estcblisheci.
I, Naaber and Locatipn of S3milnr Components At the Trojan Nuclear Plant, the RHR pumps, P-202 A & 15, are the only other itumps similar to the containment spray pumps.
These putaps ve ri-3 spplied by the scrae canuf acturer and originally had a sluilar locknut d.mipu.
In l'!76, the locking acchanis:n for the PJIR pomp impellers "ns eMified af ter it war, discovered that one Jocknut had loosenad.
'1 h a r:muf ac turer belicves that the not. Icosened as a result of improper installa ti on and that the Rl!R pumps cay be more susceptible to lockant iouseaing thTn the contain: tent opray pumps due to a faster eno;t.dcua.
N EMR gocpc have also 1.eco ca b j e c t.
to hir.her tcuper ture c'/ cling and t >re f r e cp e n t ope r a tic o than the c on t aite e n t spray pumps.
309 255
It! cht 1 A a rt j'c,.
,a 01 Iast: 2 i.t 2 C3ctret1.u.\\ n i o.i A.
d.- ?.or r 2 c t i /c act ton con. cit t s of wndi fyi q; tne lac k i up
.m th:ntitti to ine.lu ie u:4e of sa.
serem s.vl lockiag t. abs.
II:st h ci : Jac. nut mW Li.e cup nut ar e provide <l wit h a " par;itive' :achinit nl lock.
rin inc dification f or t ha containment spray 1 u ps w311 le ucnilett
'v. r June 15, 1979.
The desinn concept is pre sently undc r revicw 1.y IM pump itanufacturar.
B.
lu:eponsible PCC Personnel Engineering:
Mr. S. R. Christcasen, Eina2er Generetion Engineering Depart:c.ent iustallation:
Mr. B. D. Withers, Superintendent Trojan Nuclear Plant nusgo l
chio 309 256
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ATTACHED IS A PART 21 PEPORT FRO'i IE PAIL UNIT - RDB 359E/W
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PART21IDSHiFICAi10Nid U-dss P
C0iPANY IFfE ACAM oo o
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DATE 0; 11htR.3 /m/79 ~
DJCKETID.
n-3W DATEDISTRIBUTED
{/45/7 9 ORIGliML PEPORT f SUPPLBEHARY DISTRIPJJTION:
PEALTOR(R)[
REL CYCE &
SEEG'JADDS(S)
I M RIALS (M)
NRP/DDR (STBLO)
AS/RTSI AD/SG-IE i RR/DRi (BOYD)
ITES/FCMS AD/ROI AD/RDI ( 2 )
PEGIONS PEGIONS AD/RCI IE FIES IPND3R ( STB 10)
PEGIONS PDR IMSS/SG SS-881 IE FIES (2) lPDR PDR CBHPAL FIES CBUPAL FIES-SS-395 "I)R CDUPAL FIES (CHRON)
CB!TFAL FIES(CHRON) ttPA 07~ 5)
~
IE FIES (2)
LPDR CB4TPAL FIES 016 TEPA B03DSINIG,IFA CB HPAL FILES (CHRON) 303DE"ilG,'?A CBiTPAL FIES - SS-395 ACTID%
B 3 D3!'ilG, !?A PRELIMINAR( EVUALATION OF THE ATTACHED REPORT ItOICATES LEAD RESPONSIBILITY FOR FOLLO.t-UP AS SHDhti BELOW:
E E
ifSS OTHER RCIW FFMSI 3()9 257 N6W