05000324/LER-1981-019-03, /03L-0:on 810214,RHR Shutdown Cooling Supply Inboard Isolation valve,2-E11-F009,would Not Open from Rtgb.Caused by Burned Valve Motor Windings.Motor,Model SMB3, Rewound & Reinstalled

/03L-0:on 810214,RHR Shutdown Cooling Supply Inboard Isolation valve,2-E11-F009,would Not Open from Rtgb.Caused by Burned Valve Motor Windings.Motor,Model SMB3, Rewound & Reinstalled

ML19350B790
Person / Time
Site:	Brunswick
Issue date:	03/16/1981
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19350B784	List: 05000324/LER-1981-019, Forwards LER 81-019/03L-0 05000324/LER-1981-019-03, /03L-0:on 810214,RHR Shutdown Cooling Supply Inboard Isolation valve,2-E11-F009,would Not Open from Rtgb.Caused by Burned Valve Motor Windings.Motor,Model SMB3, Rewound & Reinstalled
References
LER-81-019-03L-01, LER-81-19-3L-1, NUDOCS 8103230705
Download: ML19350B790 (2)

LER-1981-019, /03L-0:on 810214,RHR Shutdown Cooling Supply Inboard Isolation valve,2-E11-F009,would Not Open from Rtgb.Caused by Burned Valve Motor Windings.Motor,Model SMB3, Rewound & Reinstalled

Event date:
Report date:
3241981019R03 - NRC Website

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I EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h i

Q l Following a planned reactor shutdown while attempting to place RHR shutdown cooling into service, the RHR shutdown cooling supply inboard isolation valve, 2-Ell-F009, l

F3T31 I l would not open from the RTGB. The valve was manually opened, RHR shutdown cooling l

o 4 This I l vas placed into service, and the plant was in cold shutdosm within eight hours.

a s I event did not affect the health or safety of the public.

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS The valve

@ l Burned motor windings. prevented the valve motor from opening the valve.

l motor, Model No. SMB3, was revound, reinstalled, and the valve was tested satis-i

- i i A thorough investigation of this event including ang g i factorily and returned to service.

g i inspection of the failed valve motor windings, power supply circuit breaker and wirinq l

1 did not reveal a cause for this failure.

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LER ATTACHME.T - RO # 2-81-19 N

Event Date: 2-14-81 Facility: BSEP Unit No. 2 A complete review of the operating history of this valve did not reveal any previous valve f ailures attributed to f ailed valve motor windings. Following, the rewind and replacement of the valve motor, the valve motor and the valve were checked for proper operation including a measurement of the motor run current which was found to be satisfactiory. As no contributing cause to the failure of this valve motor could be determined and this valve has no history of events attributed to valve motor failures, this event is considered to be isolated with no further corrective action required.

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