ML19338E570

Updated LER 80-014/03X-1:on 800608,during Surveillance Test W/Unit at Full Power,Outboard Isolation Valve MO-3-10-26B for B RHR Containment Spray Failed to Close.Caused by Stem Nut Jammed Against Drive Sleeve.Nuts Repositioned

ML19338E570
Person / Time
Site:	Peach Bottom
Issue date:	09/26/1980
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
LER-80-014-03X, LER-80-14-3X, NUDOCS 8010030366
Download: ML19338E570 (1)

Text

5 Mr. Doyco it. Grice, Direstor No. j-80-lh/3x-1 Cffice of Inspection f, Enforcement, ReglOr i U.S. Nuclear Regulatory Comission 631 Park Avenue King of Prussia, PA 19406 Dear Mr. Grier This updated 123 concerns the failure of the "B" KDt containnent spray outboard isolation valve (X0-2t,B) to close during surveillance testing. The governing Technical Specification is 3 7.D.1 m.#.-..

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twtNYoaft 44 Pb a48QM7Dall ed tvsNt ossCRiPfioN AND PRQO ASLE CONstOUDets h 4 l 2 i [ During perfomance of a surveillance test with the unit at full power. I m l valve M0-3-10-268 (outboard isolation valve for "3" IUiR contaiment I a 14 i i spray) failed ts close after being opened and was therefore declared I 3 i s i t inoperable per Tech Spec 3.7.3.1. The redundant inboard isolation valve. f

o is i f MO-3-10-318. was maintained in the closed position and the E FFD  !

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34 d da M 3# M 46 43 4J 44 gy CAust ossCRiPTION AND c0RRECTIVf ACTIONS h l$ tol l Inspection revealed that the Limitorque valve operator sten nut and sten I g ilocking nut were backed out because the locking nut had not been I g i staked. The valve could not fully close because the stem nut jammed t g i against the drive sleeve. The nuts were repositicced and the locking nut  !

g ; staked. The valve was repaired and successfully stroked on 8/22/30.

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