05000272/LER-1981-020-03, /03L-0:on 810224,snubber on Top of RHR Pump 11 Was Found to Be Defective.Probably Caused by Intermittent Seizing of Balls in Race Due to Internal Corrosion.Snubber Replaced

/03L-0:on 810224,snubber on Top of RHR Pump 11 Was Found to Be Defective.Probably Caused by Intermittent Seizing of Balls in Race Due to Internal Corrosion.Snubber Replaced

ML18086A652
Person / Time
Site:	Salem
Issue date:	03/25/1981
From:	Steele W Public Service Enterprise Group
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML18086A651	List: 05000272/LER-1981-020, Forwards LER 81-020/03L-0.Detailed Event Analysis Encl 05000272/LER-1981-020-03, /03L-0:on 810224,snubber on Top of RHR Pump 11 Was Found to Be Defective.Probably Caused by Intermittent Seizing of Balls in Race Due to Internal Corrosion.Snubber Replaced
References
IEB-81-01, IEB-81-1, LER-81-020-03L, LER-81-20-3L, NUDOCS 8106090571
Download: ML18086A652 (1)

LER-1981-020, /03L-0:on 810224,snubber on Top of RHR Pump 11 Was Found to Be Defective.Probably Caused by Intermittent Seizing of Balls in Race Due to Internal Corrosion.Snubber Replaced

Event date:
Report date:
2721981020R03 - NRC Website

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!During normal operations at 1925 hours0.0223 days <br />0.535 hours <br />0.00318 weeks <br />7.324625e-4 months <br /> on 2/24/81, the No. 11 RHR Pump was

[£))] I declared inoperable in order to perform Engineering Test DCR #1EI1153 IAW NRC

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jBulletin 81-01, "Surveillance of Mechanical Snubbers".

Action Statement 3.5.2 was [QJ]J I entered.at this time.

The snubber mounted on the top of the pump motor was found [9J}] 1to be defective.

Previous similar occurrences:

79-54 and 81-17.

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42 43 44 47 jThe apparent cause of the snubbers failure appears to be the result of internal o::IJJ 1corrosion that caused intermittent seizing of the balls in the race.

The OJ)) I defective snubber was replaced in kind with one that was tested satisfactory.

The ITl2J jAction Statement was terminated at 2015 hours0.0233 days <br />0.56 hours <br />0.00333 weeks <br />7.667075e-4 months <br /> on 2/25/81.

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