ML20002B105

LER 80-018/03X-1:on 800802,reactor Water Cleanup Sys Return Isolation Valve MO-3-12-68 Failed to Close by Control Switch.Caused by Valve Pressure Seal Leak in Motor of Limitorque Operator SMB-0-10.Motor Replaced & Seal Repaired

ML20002B105
Person / Time
Site:	Peach Bottom
Issue date:	12/01/1980
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
LER-80-018-03X, LER-80-18-3X, NUDOCS 8012090441
Download: ML20002B105 (1)

Text

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4 Mr. noysu H. Grier, Director no. 3 -CO-14/3L .1

Office of Inspsction & Enfor:ement, Region i 6

, U.S. Nuclear F egulatory Commission p 631 hrk Avente O King af Prusn e, PA 19406 a

Dear Mr. Gricra .,

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This L.E.R concerns the tailure of the reactor water cleanup sy em reti.rn u 3 .o y GC isointion valve, MD-3-12-58, to close durin surveillance tenin . ne governing Tech. Specs. are 3.7.D.1 and 3.7.D.2.

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EVENT DEscRaprioN AND PROa A8LE CONSEQUENCES h lulei i While performing surveillance tes* on PCIS no-rily om valvec vith the  !

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,,,, , unit at full power, reactor water cleanur system return isolation valve i j , ,, j g NO-3-12-58 failed to close ucing the control switch. The valve nas closed- 1

;p , using the breabr contNeots and declared inoi.:~able per Tec!.. Spec.  !

,og3g 3.7.D.2. The redundant isolation valve was operable. I

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JJ 34 3h 36 3# . 40 el 42 43 44 4r CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h a

! , i o i l Drive motor of limitorque type SMB-0-10 operator had a rround, believed  !

g I to be caused by moisture from leakage of the valve pressure seal. Daily I l valve position monitorin~ was initiated. The motor was replaced in kind 1 4

] [ nnJ the sc.t1 leak repiired. On 10/78/80 ti.e v.ilve was satisfactorily I i,,.i , leak testeJ, stroke timcJ and reterned to service. I e a g

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