ML20127P541

RO 75-3:on 750128,both Unit 2 Safety Injection Pumps Incapable of Starting on Automatic SI Signal from Approx 0900 to 1100

ML20127P541
Person / Time
Site:	Monticello
Issue date:	01/29/1975
From:	NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 9212020246
Download: ML20127P541 (2)

Text

__

0

-/

-44

-. ,. . , a . +-r re,. ,. , .. .t

. Au..a , .,,, '

f4 toirfrs H ut V2ttsi. S."rtNA*..tr o n iP: *o Mite.FJe oto s* W AU4t:

D?AUi!!J lutM.Gr ringh1LW OPUZIlf,Tf!G PLMliT;.

ItTr f4 R 11

• A )I't. 55GBCf J. w eg.RC L1T15i DA u etor tur.i:T P t; 1 *.n . 7IT:

10@.tia cr.au y- t1;f f-i'isv.c u; Sh 75 s> .PAa a uvte du l'.*,.'.A Gi b a is11;, A W C 'ad7a  ;

ATIsti , 14t7. 1% ,. C'. . C1mt1 r.e .

111.709T', or /7.tn".*fJ;. r,;;rrn c.;nt:: 1m 75 '7 4

Om Atw. nyyr %Q F.95 tit;h;it.51h 29C1.fnt.yf Iry.et/Lt:;:~ p.sym tur m A .nye! 13. cfi '

tcmML.t~ or: cre cu.c.c;atLc. G. D ed 7: iL'. t'v - n . w 7 :'. -u&

• v J.; t m ):s T.~. 'C .v teit : u .:r. c; st-J.O n; , r.t 40v u 8r. ~/J.~,5 } : n c: ti. s.v... A u th *. .9 U . .:.a i e t O..:..

!yr2Mem 27.'.*ST: y. ,,e- t r:w trei ci.;. t cate * 's,L.L~ % n .1 . ..%.t.'; . D;w 'e? 1T cm1 t.-c us.rn t c .t t g rqv.34 7 til"- l'Y,e 22? CI. r/ r .nt

• e., t c a t:cru 1:me r,pypL"1 Mr.M rs.nr t:n r:+ .' ri t;..

one, l~nEm 21.. It7. net *,.Cnr3 O?.'lh teu 110:t, .T. nK*a Am t.L . . Ce i./ 'fr M .t - n;'fic+

um intrit . teatr mri p e*

• tb r o.%.h3 'y -th.tm:o D..t. . em. Y. .c u :. uf f -lDL'?. V. sit h tou t.iU ltxtes p;ww.ut44 m TttU ALFe& .y.' Tnd bt:t:Um, c;;;;un;im. ..

Thrcninhoutr thitu r.1f,%..c7 m C:mtrol;itsen o;mun.w,.eM7 '.m pntir.hburr.;ita th: S.wwh L? tate.< T.wu wa.G; las. n.r- 1 Lt.Liu htwL w. hein.s j.. N Th'n,- En1r.:::W.~.1 ".

t1inplT rr h Ie . ; t.i':. t*mt I aL gj rc.ece.1.tmana inc. t ;<.. c e ccc,D p.ct:01... L.v (tin M v w tm av.wc . oE tc1u. Oc::n . ..

N-J,' . '

w r .. .

p; 4..,.',, " 3 +."bo. '. . VM iq, _,f

, ,g ' *.

P ; 1.'". . .T.I ca twy , ,. J r,, , *#

1*l&crtt. 1 *.bcp re-

. P: utin Ltd cr.if Inutioce: l'1 rats.

FT'?::dm ecr Dixcetor:sua.- of Luvus1.tm.

- Attor fN. C.. !bekler,7 L. 01. !!%y ec

0. Ih imLim #

4 9212O20246-750129 .

PDR ADOCK 05000263 8.. PDR I

. I

) .

i i

l l

REP 0fti OF APNOkMAL OCCUP.RENCE No. 75 3,

, On January 2E, 1975, both Unit 2 Safety Injection Pumps were incapab]c of starting on an automatic SI signal from approximately 0900 to 1100, The unit vas operating at about 73% porer throughout this time period.

Number 22 SI pump vac racked out while a leak in the oil cooler was being repaired. Number 21 SI pump was tested for operability prior to raching out Number 22. However, from 0900 to 1100 Train A of the Safeguards Logic was under test an per conthly Surveillance Test STP-1032A, which would have prevented a Train A Safety Ejection actuation.

Throughout this time, the Control Room operator rho uas participating in this curve 111ance test could have initiated a Train A Safety Injection i

by simply pushing the tect relay react button en the control panel. The operator was aware of the fact.

.--a.-s,.w-,, _ . - . , - . . . . - - - ~-,.--,--e