ML19345E158

LER 80-089/03L-0:on 801117,torus Water Level Indicator Lr 5038 on Panel C903 in Control Room Began to Oscillate Irradically.Instrument Declared Inoperable.Caused by Failure of Forced Balanced Motor Boyancy Level Transmitter

ML19345E158
Person / Time
Site:	Pilgrim
Issue date:	12/17/1980
From:	Mcloughlin M BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19345E156	List: ML19345E155 ML19345E158
References
LER-80-089-03L, LER-80-89-3L, NUDOCS 8012230356
Download: ML19345E158 (1)

Text

NRC FOIM 366 U.S. NUCLEAR REGULATORY COMMISSt@M (7 771 LICENSEE EVENT REPORT i iP<E :11~1 oR 1v E << r.EeelRE= l~ oRMArto~>

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7 8 9 LICENSEE CODE 14 15 LICENSE NUMSER 26 LICENSE TYPE JG CON *1 1011l 3[RCE l b hj0 l 5 l 0 l -l 0 l 2 l 9 l 3 l@l 1 l I l 1 l 7 l 810 l@l 112REPORT 74 7S l 1 lD7ATEl 81080l@

7 8 60 61 DOCKET NUMB ER 68 63 EVENT DATE EVENT DESCRIP110N AND PROBABLE CONSEQUENCES h 10l2l l On November 17, 1980 at approximate 1v 0430 hours0.00498 days <br />0.119 hours <br />7.109788e-4 weeks <br />1.63615e-4 months <br /> Torus Water Level Indicator LR 5038 l g l located on panel C903 in the Control Room began to oscillate irradically. No actual l l0lA; l torus water level changes were being erperienced. The instrument was declared in- l 10 I s i l operable. A priority 'A' maintenance request was immediately issued for repair of l l0 is l l the instrument. The system was returned to service on December 8. 1980. l l0 l7l l l I

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• $'E CO$E S 8CiOE CouPONENT CODE SU8C OE S E Q7 8 lTlElh lElh W h lI lN lS lT lR lU lh {@ lZ lh 9 to 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION E REPORT NO. COOE TYPE NO.

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33 34 Jb 40 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS li10llI&C personnel determined that the forced balanced motor, a comoonent of the suppressioh g l chamber, boyancy level transmitter, manufactured by Foxboro Corooration. had fM ied. I g

The component was replaced in-kind, the instrument re-calibrated and returned to  ;

,,,,,gservice. This is an isolated event. l mi 8 9 7 80 I

STA S  % POWER OTHER STATUS Dis O RY DISCOVERY DESCRIPTION

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PERSONNEL EXPOSURES NUM8ER TYPE DESCRIPTION 1 7 l0l0l0l@lZl@l"

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