ML20009C109

Forwards LER 81-011/03L-0.Detailed Event Analysis Encl

ML20009C109
Person / Time
Site:	Oconee
Issue date:	06/17/1981
From:	Parker W DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009C111	List: ML20009C109 ML20009C115
References
NUDOCS 8107200292
Download: ML20009C109 (2)

Text

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DUKE POWER COMPANY (4pfg Powen Utnt.o No W,

.w:2 Sourn Cut:ncu SrnesT, CILAHLOTTE N. C. 28242

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WI L LI A M O. PA R et E R, ,J R.

/'C P Pe t Si C F N T TELEPwCNE: A#Ea 704 srs.- P.ooveto June 17, 1981 373 ace 3

$/- G Q - C3h Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Commission f[#{ %l4 Region II '

T} N 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 g p\ {h ^3 JUL 171981* -

Re: Oconee Nuclear Station , , .ms noAAKd8 Docket No. 50-287 '

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Dear Mr. O'Reilly:

' y ,,

Please find attached Reportable Occurrence Report RO-287/81-11. This report is submitted pursuant to Oconee Nuclear Station Technical Specification 6.6.2.1.b(2),

which concerns operation in a degraded mode permitted by a limiting condition for operation, and describes an incident which is considered to be of no significance

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with respect to its effect on the health and safety of the public.

n Ve truly yours,' g- q

,/\} -4.,. m d, t e. s William O. Parker, JLI:pw Attachment cc: Director Mr. Bill Lavallee Office of Management & Program Analysis Nuclear Safety Analysis Center U.S. Nuclear Regulatory Commission P. O. Bcx 10412 Washington, D. C. 20555 Palo Alto, CA 94303 l

i hl 8107200292 810617 gDRADOCK 05000287 PDR

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s DUKE POWER COMPANY OCONEE UNIT 3 Report Number: R0-287/81-11 Report Date: June 17, 1981 Occurrence Date: May 18, 1981 Facility: Oconee Unit 3, Seneca, South Carolina Identification of Occurrence: Mechanical Snubber Inoperable Conditions Prior to Occurrence: 100% FP Description of Occurrence: At 0730 hours0.00845 days <br />0.203 hours <br />0.00121 weeks <br />2.77765e-4 months <br /> on May 18, 1981, a safety-related mechanical snubber was discovered inoperable during a visual inspection. The snubber was lo-cated on the Unit 3 LP Condensate Line. This constitutes operation in a degraded mode per Technical Specification 3.14.2 and is thus reportable pursuant to Techni-cal Specification 6.6.2.1.b(2).

Apparent Cause of Occurrence: The snubber being " locked-up" was due to the ball screw shaft of the snubber was found to be slightly scored, thus prohibiting the ball bearings from rolling smoothly.

Analysis of Occurrence: The inoperable snubber was replaced with a new one well within the time permitted by the Oconee Technical Specifications. All other snubbers and hangers in the area were operable. Thus, the health and safety of the public were not affected.

Corrective Action: The snubber was replaced with a new one from supply. The in-operable snubber will be sent to Pacific Scientific for analysis of failure and repair. Procedures will be revised to indicate that all mechanical snubbers will be stroked the full range before installation.