ML19210E792

LER 79-095/03L-0:on 791110,during Relief Valve Test,Pump Relief Valve Lifted at 1,250 Psig.Caused by Scuffing on Stem Guide Bushing Id & on Stem Od.Scuffing Cleaned & Surfaces Polished Smooth

ML19210E792
Person / Time
Site:	Brunswick
Issue date:	12/10/1979
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19210E791	List: ML19210E790 ML19210E792
References
LER-79-095-03L-0, LER-79-95-3L, NUDOCS 7912120303
Download: ML19210E792 (2)

Text

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h ji o IFo11owing the first failure, the valve setpoint was reset mid the valve tested satis- l i i Ifactorily. When _h e valve was tested again two weeks late: to verifv cuerabilitv, it I ji l,1 again failed in the same manner. 'lhe valve was disassembl e d .nd inspected. .he stem l i 3 guide bushing ID had minor surface scu f fing down one side, md ninor su r f ac e scuf fina l 13 14 ] ]was found on the stem Oa parallel to the bushing scuffing, causing ac interference 7 a 9 (Cont'dha F ACILITY , '/ETHOD OF STATUS %POWEH U T t H :iT A T US DISCOVE H Y D, C CC JH ( Ci RH P TION A NA 1

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LER CONTINUATION -- RO# 2-79-095

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Facility: BSEP Unit No. 2 Event Date: 11-10-79 fit. The scuffing on the stem and bushing was c1 caned and the surfaces were polished smooth. The valve was reassembled, the setpoint established, and the valve was test-ed satisfactorily. This is considered an isolated event, and no further action is required.

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