05000321/LER-1980-104-03, /03L-0:on 800826.during Annual Surveillance & Operability Testing,Five Snubbers Did Not Meet Acceptance Criteria.Caused by Seal Leakage as Snubbers Were Low on Fluid.Two Snubbers Were Reconditioned & Others Replaced

/03L-0:on 800826.during Annual Surveillance & Operability Testing,Five Snubbers Did Not Meet Acceptance Criteria.Caused by Seal Leakage as Snubbers Were Low on Fluid.Two Snubbers Were Reconditioned & Others Replaced

ML19332A424
Person / Time
Site:	Hatch
Issue date:	09/09/1980
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19332A422	List: 05000321/LER-1980-104, Forwards LER 80-104/03L-0 05000321/LER-1980-104-03, /03L-0:on 800826.during Annual Surveillance & Operability Testing,Five Snubbers Did Not Meet Acceptance Criteria.Caused by Seal Leakage as Snubbers Were Low on Fluid.Two Snubbers Were Reconditioned & Others Replaced
References
LER-80-104-03L-01, LER-80-104-3L-1, NUDOCS 8009150386
Download: ML19332A424 (2)

LER-1980-104, /03L-0:on 800826.during Annual Surveillance & Operability Testing,Five Snubbers Did Not Meet Acceptance Criteria.Caused by Seal Leakage as Snubbers Were Low on Fluid.Two Snubbers Were Reconditioned & Others Replaced

Event date:
Report date:
3211980104R03 - NRC Website

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Licens~ee : Georgia Power Company Facility Name:

Edwin I. Hatch Docket #: 50-321

Narrative

Report for LER 50-321/1980-104 During annual accessible snubber surveillance and subsequent testing for operability due to beir.g found low on fluid, five snubbers failed to meet the acceptance criteria for operability.

Each snubber failed operability criteria by the following values:

1E41-HPSEH-2,10 Kip - would not lock-up in the retract mode.

1E41-HPSEH-8B,10 Kip - failed extended bleed rate 10.81 IPM. llould not lock-up in the retract mode.

1E41-RHRH-214, 20 Kip - failed retract lock-up rate by 8.8 IPM.

1E11-RHRH-310, 3 Kip - failed extended bleed rate by.580 IPfi. Failed retracted lock-up rate by 6.7 IPM.

1E41-HPSEH-12,10 Kip - failed extended bleed rate by 5 IPM.

Snubber failure is repetitive as last reported on Reportable Occurrence Report No. 50-321/1980-070. There wgfd no effects on public health or safety.

The cause of the fail'ures was attributed to seal leakage.

Once the snubbers became low on fluid, air mixed with the remaining fluid causing an increase in l

the bleed rate or no lock-up at all.

Two snubbers were reconditioned, retested and returned to service. Three were replaced with spare snubbers.

Seal failure on hydraulic snubbers is a routine failure due to natural aging, environment and service of snubber. Normal surveillance is sufficient to detect this problem.

The generic review revealed no inherent problems.

The Hydraulic Shock and Sway Arrestor Inspection and Functional Test Procedure is used to verify operability of hydraulic snubbers in accordance with Section 4.7.4 of Tech Specs.

Due to these failures, required Tech Spec snubber surveil-lance frequency has been increased.

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