ML19308A507

Abnormal Occurrence 74-19:on 741017,1C Makeup Pump Motor Failed to Start During Engineered Safeguards Loading Sequence Quarterly Surveillance Test.Caused by Jammed Motor Breaker Trip Mechanism.Breaker Replaced

ML19308A507
Person / Time
Site:	Three Mile Island
Issue date:	10/18/1974
From:	Herbein J METROPOLITAN EDISON CO.
To:
References
NUDOCS 7910250733
Download: ML19308A507 (1)

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Subject:

- Abnor=al Occurranca Ho. A0 74-19 '

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This telcira is ta confi: tha telecen betaan Lc2 Suscardt (Region Ilf.EC),

cnd J.G.. I:ar:.cin ( ::1-Statica Supcrintendant) ct 0020 L:urs la Oct2cr 1974. ,

The follcuing r rcrt is sto itt:d in accordance eith p:ragr ph G.7.2.a (page 6-11) of the tecinical spacifications. . ,

At 1203 haur; cn 17 Octcher 1974, the 1C i:2 csp Prd btne failed to st:rt -

t.hile Paricraing. t2.3 Engin:cred Safc;uards Lc:dira kqu:r.c -Quarterly Survaillance Tcst. .

The IB Dhcri Pcm u:s lir.rd ep cs tha Er.gir.rared Sarac.::rds !!ich Pres;urc Injectica Pt:.? and t::s varified ta be c;;r:ble.

Investic;tien into the IC i::%2co Pe ? Btor start failura, revealed the rotor brack.:r trip ac'ranita ap?2ared to La jer.ed, thus preventing the breaker frca clcsing. -

The roter breder was r: sved fre a t':2 switch 2;r t-d test:d. It failed to clcr.e. A : para brat.er 1:.:s test;d ten inser:.ed into the- cuitch;?ar. The

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IC 1::kcep Pe p was then su::assfully started.

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