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LER#78-057/03L-0 on 781013:2-1402-4b Flow Test Valve Failed to Close Fully Against Pump Pressure.Caused by Value Being Inadequately Lubricated
	ML20027A331
Person / Time
Site:	Dresden
Issue date:	11/09/1978
From:	Achterberg J; COMMONWEALTH EDISON CO.
To:	; NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17173A365	List: ML17173A364; ML20027A331;
References
	LER-78-057-03L, LER-78-57-3L, NUDOCS 7811160115
	Download: ML20027A331 (2)
	v • d • e

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,, U.S. NUCLEAR 4 REGULATORY cOf.l?.tl5SION LICENSEE EVENT REPORT (PLEASE PR:NT OH TYPE ALL REQUIRED INFCRMATIONI l

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d u3 61 DOCKET NU?.tC ER na 63 EVENT C ATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h

ol2l l During normal operation, the 2-1402-4B flow test valve failed to close fully against l 5 a i3 ; l pump pressure while performing DOS 1400-1, core spray system pump operability. The l 1 o l .1 l l core spray pump was secured and the vs.ve closed fully. Safety significance was l 1Oisl l minimal since the valve is normally closed during core spray operation. This event [

6 o Is } l occurred again on 10/23/78 and 10/24/78. l I

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SY S TE '.1 CAUSE CAU E COMP. VALVE CODE CODE SUSCCOE COMPONENT CODE SUSCODE SUSCOOE

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44 4y CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 i i e o l l Vlv. stem not adequately lubricated. Vlv. onerator disassembled and no anomalies I

.i j l found. After reassembiv viv. was.successfully cveled. Bkr. contactors were cleaned I

,i l and checked torque sw. settings were verified prior to cycling. V1v. 1402-4B was I i,;3l l scheduled for lubrication in Oct, but failed before lube performed. All frequently 'l

, i4, l operated accessible ECCS vivs. will be lubed on a 6 mo. program. l

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ML20027A331