ML20150C185

/03l-0 on 781027:while Performing Procedure HNP-2-10315,2E41-F001 Valve Failed to Oper During HPCI Quick Start.Caused by Motor Shunt Field Insulation Failure

ML20150C185
Person / Time
Site:	Hatch
Issue date:	11/03/1978
From:	Nix R GEORGIA POWER CO.
To:
Shared Package
ML20150C184	List: ML20150C180 ML20150C185
References
LER-78-056-03L, LER-78-56-3L, NUDOCS 7811140204
Download: ML20150C185 (1)

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a w u ooc < t r t.uva n j rvcoT otscnmTION AND PROBAUL.E CON 5f OUENCEO ith the reactor @ in the run mode, the 2[41-F001; J2j j'.!hile perf cr"linq procedure llNP-2-10319, w f inoperable i

37 l valve failed to operate during the llPCI Quick Start. The IIPCI system being l

rpq { Technical Specification 3.5.1.a) did not affect safe plant operation as the RCIC, j

9 i s; [ ADS, CSS, and LPCI systcms were operable. Public health and saf ety were not affected 1[by this incident. l f a

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cAUSE DESCRIPTION ANo CORRECTIVE ACTIONS h -

l t 101 lThe 2E41-F001 valve f ailed to ocerate due to a motor shunt field insulation failure.

i.j i j lThe motor f ailure was orobably caused bv frecuent onorations resultina in a degradationi l l i i;, j lof the insulation by heat. The valve stem was also found rouah encuch to impair oner-il3j lation bJt not enouqh to prevent coeration. The motor was rewound and the stcm replaced.l l

l i l<.1 lThe valve was then tested and placed back in service within the required tire oeriod.

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