ML19308A497

Abnormal Occurrence 74-21:on 741031,high Pressure Injection Valve Failed to Open in Response to Control Room Console Manual Pushbutton.Caused by Misadjustment of Limit Switch Contact.Contact Readjusted & Valve Successfully Tested

ML19308A497
Person / Time
Site:	Three Mile Island
Issue date:	11/01/1974
From:	Herbein J METROPOLITAN EDISON CO.
To:
References
NUDOCS 7910250694
Download: ML19308A497 (2)

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r,T or r:cz non .mc re.or;t.crm*.'N.N!a:WLv/smt 1;c37 TcLUrHCim 717-F. M.0 M O,.___

i:cet der 1,1974 m' n 0 DJ I:e. J.P. O'P.ailt , Director ou I Dir >rste of it.gulatory Rem;ca 1 o0 ~9~I m A I

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King 02 Pru:::.ia, Pa. 10G3 Oparatir.r' Li::r.r.: C?i!-50 00:Let 50-E' 3 Subject; f.bnor=1 Cccurren o i'o. 73 74-21 Daar I;r. O'P.cilly:

This telepren is to confira the telecca ir S:can Lca Spasstrd (P. qion I-IIC),

cnj J.J. Colitz (li:(-L'iiit i Suparintradant) at 1103 hours0.0128 days <br />0.306 hours <br />0.00182 weeks <br />4.196915e-4 months <br /> 11:nva:_Scr 1974 The follcuing r >crt is tWaitted in ccenctnce uit5 p;recrcp*16.7.2.a.4 (Poca G-ll) of the it hnical spacificnicic. ~

.t On 31 Octch _r, liich Prescura In.icction t'alva UMia failci tr cr:n t.hile att:ce7 ting to cycio it rc utely frem the control rcLa by use of the contral rean ccarole t:ntsi pud-but:cn.

IMdundant !!ich P:".sr. ora Inbetica V;lves (DJ-VIEC cnd D) ucra seb:;equentiv torted setb.cctarily. I'J-.ia uns dico tast;d satisfactoriiy.

Durinq Oa p2riommo of SP 1243-5.2(!:P ." LP lirJectinn Leadian 52cuer.co cne C:...:penent Tcr.t. mi I;P In.iccticn tr?ic Chann21 Test) en 10/1I/74,' I? MICA opened succesr. fully c:; y rificd locally etul b'/ t: e cc:.putcr. Tha bica in-i cicarirm lie-::t en Um 115 Pwel faile.d ta li :ht, and it utas tro iics!.cotic.n' thh r.urveillanco tcsr. cycc;.tica that ied to this inciCenc.

i Invastigntion int, t'.a ::1-ViG failure rnonled the valve v.:uld rit cpn cl0 trically. ih.: vaiva t as partially c :r,td u',inti the local liritorcue h.ind intel cr.1 then fully ci an d clectricallf. The vcive :n thcn cle::cd electric;11y and in aturpt m:s rade to c!cctrically op:n t.he valve. The valva cnin failed to a:na. T!.e f ailura of the raive to cpan cr.paared to be rii;idjust=nt of a lir.it Switch conta.ct. '4

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/giq 7910250 $ h j

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The limit s. itch cc .t:.ct t>r.s r:MJusted m!. tha vaha t.':7. succc sfully te:ted.

VEry truly yours,

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