05000321/LER-1981-055-03, /03L-0:on 810327,snubbers 1B21-FDH-19, 1B21-FDH-22A,1B21-SS23 & 1E11-RHRH-234 Were Low of Fluid. Probably Caused by Seal Leakage.Snubbers Replaced

/03L-0:on 810327,snubbers 1B21-FDH-19, 1B21-FDH-22A,1B21-SS23 & 1E11-RHRH-234 Were Low of Fluid. Probably Caused by Seal Leakage.Snubbers Replaced

ML20009F445
Person / Time
Site:	Hatch
Issue date:	07/02/1981
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009F440	List: 05000321/LER-1981-055, Forwards LER 81-055/03L-0 05000321/LER-1981-055-03, /03L-0:on 810327,snubbers 1B21-FDH-19, 1B21-FDH-22A,1B21-SS23 & 1E11-RHRH-234 Were Low of Fluid. Probably Caused by Seal Leakage.Snubbers Replaced
References
LER-81-055-03L, LER-81-55-3L, NUDOCS 8107310160
Download: ML20009F445 (2)

LER-1981-055, /03L-0:on 810327,snubbers 1B21-FDH-19, 1B21-FDH-22A,1B21-SS23 & 1E11-RHRH-234 Were Low of Fluid. Probably Caused by Seal Leakage.Snubbers Replaced

Event date:
Report date:
3211981055R03 - NRC Website

text

NRC FORM 366 (7 77) e LICENSEE EVENT REPORT 4

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8 60 61 DOCKET NUMBER 68 69 EVENT DATE 14 75 HEPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEOUENCEs h I O 121 l During refueling and cerforming surveillanco nf acepetible and inaccessihla l

10i3; l snubbers (HNP-1-3915) per Tech specs 4.6.L.1, Snubbers 1821-FDH-19, 1B21-J lO I A i l FDH-22A,1821-5523 and IE11-RHRH-234 were low of fluid. When tested they lO isi l failed to lock-up properly.

This is a repetitive event as last reported l

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on Reportable Occurrence Report No. 50-321/1980-104.

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40 41 42 43 44 47 JJ CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 1 i 101 l The cause of the event was at+ ributed tn seal leakage nn the snuhhort-l 1i ii l l Once they became low on fluid, air mixed with the remainino fluid causino l

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NAME OF PREPARER R T Niv. que nf Maint.

PHONE:

O LER No.:

50-321/1981-055 Licensee:

Georgia Power Company Facility:

Edwin I. Hatch Docket No. :

50-321

Narrative

Report for LER 50-321/1981-055.

During refueling and performing surveillance of accessible and inaccessible snubbers (HNP-1-3915) per Tech Specs 4.6.L.1, snubbers IS21-FDH-19, 1821-j FDH-22A,1B21-SS23 and 1E11-RHRH-234 were low of fluid. When tested they failed to lock-up properly.

This is a repetitive event as last reported on Reportable Occurrence Report No. 50-321/1980-104.

There were no effects to the public's health or safety due to this event.

The cause of the event was attributed to seal leakage of the snubbers.

Once they became low on fluid, air mixed with the remaining fluid causing little or no lock-up potential.

The snubbers were replaced, retested satisfactorily and returned to service.

Seal failures on hydraulic snubbers occur because of natural aging, environment and service of the snubbers.

Normal surve'llance is sufficient to detect these problems. Bergen-Paterson hydraulic snubbers are used on Unit I and Unit II at Plant Hatch.

A generic review revealec no inherent problems with hydraulic snubbers.

The hydraulic shock and sway arrestor inspection and functional test procedure (HNP-1-3915) will be scheduled in accordance with Tech Specs 4.7.4 due to these failures.

1 This event was not reF>rted immediately as required.by our plant procedure (HNP-425 - Deviation Reports) because of personnel error.

The personnel involved were instructed on the importance of knowing and following plant procedures.

These failed snubbers were replaced when they failed surveillance.

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These failed snubbers were found during review of surveillance data sheets.

Immediately upon finding the failed snubber data sheets, the failed snubbers j

were reported per plant procedure, HNP-425 - Deviation Reports.

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