ML19351E601

LER 80-071/03L-0:on 801106,malfunction of Helium Circulator 1B Speed Modifier Caused Loss of Plant Protective Sys Function of High Speed Trips to One of Three Channels.Caused by Resistance Change in Speed Element Cable Assembly

ML19351E601
Person / Time
Site:	Fort Saint Vrain
Issue date:	12/05/1980
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19351E596	List: ML19351E595 ML19351E601
References
LER-80-071-03L, LER-80-71-3L, NUDOCS 8012100509
Download: ML19351E601 (1)

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REPORT CATE 8 60 61 COCKET NUM8gR EVENT DESCRIPTION I NO PROS A8LE CONSEQUENCES h I o I 21, A malfunction of helium circulator IB speed modifier caused loss of olant erotective l toi3l l system function of high speed trips to one of three channels. Reportable per Fort St.l I

[ol.l l Vrain Technical Specification AC 7.5.2(b)2 operation under a degraded mode of LCO 4.4.J.,

e in;3; ; Table 4.4-3. No affect on plant operation. Probable consequence was loss of high l j g o is ; j speed circulator trip function to one of three channels. Redundant sys_ tem available j lo47; land operable. No affect on public health or safety. Similar reports Ro 78-15 and l I

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, g unbalance caused by a resistance chai.ge in the speed element cable assembly. In- l g

stalled spare speed element and cable connected and speed modifier balanced.  ;

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