05000287/LER-1981-011-03, /03L-0:on 810518,safety-related Mechanical Snubber Was Discovered Inoperable During Visual Insp.Caused by Ball Screw Shaft of Snubber Being Slightly Scored,Prohibiting Ball Bearings from Running Smoothly.Snubber Replaced

/03L-0:on 810518,safety-related Mechanical Snubber Was Discovered Inoperable During Visual Insp.Caused by Ball Screw Shaft of Snubber Being Slightly Scored,Prohibiting Ball Bearings from Running Smoothly.Snubber Replaced

ML20009C115
Person / Time
Site:	Oconee
Issue date:	06/17/1981
From:	Jackie Jones DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009C111	List: 05000287/LER-1981-011, Forwards LER 81-011/03L-0.Detailed Event Analysis Encl 05000287/LER-1981-011-03, /03L-0:on 810518,safety-related Mechanical Snubber Was Discovered Inoperable During Visual Insp.Caused by Ball Screw Shaft of Snubber Being Slightly Scored,Prohibiting Ball Bearings from Running Smoothly.Snubber Replaced
References
LER-81-011-03L, NUDOCS 8107200297
Download: ML20009C115 (1)

LER-1981-011, /03L-0:on 810518,safety-related Mechanical Snubber Was Discovered Inoperable During Visual Insp.Caused by Ball Screw Shaft of Snubber Being Slightly Scored,Prohibiting Ball Bearings from Running Smoothly.Snubber Replaced

Event date:
Report date:
2871981011R03 - NRC Website

text

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ITTTI I On Mav 18, 1981, a safety-related mechanical snubber was discovered inoperable r

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The snubber was located on the Unit 3 LP Condensate f IT T-'I I T in o.

The inoperable snubber was repinced with a new one well within the time I o e s i i no-i t ted bv the Oconee Technical specifications.

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Li_j,,o,jlThe snubber beine " locked-up" was due to the ball screw shaft of the snubber I i t i # I wa s found to be sliehtly scored, thus prohibiting the. ball bearings from rolling,

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The snubber was replaced with a new one from supply.

The inoperable g m I snubber will be sent to Pacific Scientific for analysis.

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