ML20086J136

Telecopy AO 74-37:on 751216,torus High Water Level Switch LS-3-23-91A Failed to Operate.Caused by Switch Assembly to Flapper Arm Found to Interfere Slightly W/Switch Case.Float/ Shunt Assembly Dismantled.Switch Cycled & Rechecked

ML20086J136
Person / Time
Site:	Peach Bottom
Issue date:	12/16/1974
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086J134	List: ML20086J131 ML20086J136
References
AO-74-37, NUDOCS 8401230221
Download: ML20086J136 (2)

Text

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/ Peac h ht t eri At on ie Powc r S QY t .u ton Delta , Pe nei<-yl va n i n L7J14 11r. Jar:.'n P. O'r.cilly, Dircetor United Staten Atoate Enerr.y Cernir.ston Directornte of Renotat.ory Opwrntionta -

631 Park Avenue King of Pru:eni/s, Pennuylvania 19406 Sublect: Abnorca L Occurrence 24-Hour Not i ficnr.lon Conf trre.in;: W. T. Ulletch'o convers.at ton with ::r. h'ait Baunuck, A.E.C.

Region 1 P.o;;ulatory Operations Of fice on Decer.ber 16, 1974 Iteforenca: Licence Nu ber DPil *iG Technica L Specif Leution nofernnce: Tablo 4,2. D Report t;o. : 50-273-74-37 Report Datst: December 16, 1974 Occurronce Dato: Decc::ber ih, 1974 Facility: Peach Button Atonte ' Poi 7er Station R.D. 1, Delta, Pennuy.Lvania 173l4 Identifleation of Occurrence:

Pallure of a torn: h h;h va ter icvol nuitch J.S-3-23-91A to npera te.

Thin witch op. rate 9 co ov.:p the tiPCI uuct.toa ircca the cond.enrw t e storn:o tack to the uupprunnion pool.

Conditiono Prior to Occurrenen:

(*n t t 3 ct approxir.itely 557, powr, Description of Occurrence:

Durtn:; a routInc instrument m.rve L 11.a nc e f.e u t . LG-3-23 -91 A f allmi to operate.

t D nl:n'arion of Apparent Conne of Occiarrence:

The uvitch a.ua:a:Ay f Lipper nrn vu foun.1 to intrrfero~olightiv vtth the uvitch c4ce.

An.nlysis of Occurrence:

LU .1 23-91A .snd 1/7-3-D-9ta ..;w ra* e indon-nd.mtly t2 'r.Ata the ilPC C suct ton fret, the condoomite prornt:c cnnk to che oupprecaton pnot.

LS-3-2)-91D hr.d luct been cernted nod foun.1 to funceton proper ty.

Decau :e the t'.:tluru of 1.:(-3-2'l-91A to operate vould not have intet t'., red with t he proper operation ,of t.be nycten, the uafuty inplicationu nre trin itra 1.

Corrcettv.e Actton: 12303-Since a 9tottar failure. had occurred prev (ously 1n.f .a resid]uutr ent of the switch c.ve:v:ni a br.d b.:en p.:rfurswl, It w.w decided thto tir:e r. ,

dit.=ntio the (1.)c.:/ ahunt t.nsenbiv. The t, hunt taa found to haw r.recter S

t w.a on inch of encec; vertient pl.4y. The + count of. play can red..e.u to abouc one-ninennch of an inch - an 1 the idemt uved hianer on th.3 f loac ,f.neniston 2.rn to nilo.i adjuar:.:nt of . t nr.t uvit.en .i;. ;cndly_ auf.y iro 2 the bane of tho uwlt.ch c rfm. I!ao :. witch v.n cycled a nu2er of t tc.wr :

9401230221 741226 PDR ADOCK 05000278 /-

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'O Abno rmal Occurrenc_q 2_t. Itoitr Penort Nurb.r 50-270-74-37 using vater to . tit *t the float, and then rochecked uaint,the opproprinto .inntritment tuarvctilnnee teut.

Fallure Thta A previous fu11ure of thi1 r witch wan reported nu Abnoemi Occueroneu Number 50 *i70-74-25 7 Very truly ymsen, s,..,-.. . -

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b', T. Ullrich, :N p ;- tritonient -

Pc:idh I;atica Atc.:le Po.mr Stettion ..

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