ML20073C407

Informs That RO-287/83-04 Not Reportable.Results of Seismic Analysis Indicate Letdown Line Was Seismically Operable W/Lead Blankets Attached.Pipe Stress,Support Restraint & Equipment Nozzle Loads within Allowable Limits

ML20073C407
Person / Time
Site:	Oconee
Issue date:	03/25/1983
From:	Tucker H DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
RO-287-83-04, RO-287-83-4, NUDOCS 8304130138
Download: ML20073C407 (1)

Text

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March 25, 19Q1 03 APR 8 A9: 5$

Mr. James P. O'Reilly, Regional Administrator U. S. Nuclear Regulatory Commission Region 11 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30303 Re: Oconee Nuclear Station Docket No. 50-287

Dear Mr. O'Reilly:

On March 11, 1983 your office was notified of a reportable occurrence involving thirteen lead blankets that were found hanging on the Unit 3 letdown line which was thought to have made the letdown line seismically inoperable. Reportable Occurrence Report R0-287/83-04 providing details of this incident was to have been submitted to you by March 25, 1983. A review and evaluation has been performed by our Design Engineering Department's Safety Review, Analysis and Licensing Division. The results of this seismic analysis show that the letdown line was seismically operable with the lead blankets attached. Pipe stresses, support restraint loads and equipment nozzle loads all remained within allowable limits. Hence, it is considered that this occurrence is without safety signifi-cance and is not reportable.

Very truly yours,

1. E. fAf49 Hal E. Tucker JCP/php cc: Document Control Desk U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Mr. J. C. Bryant NRC Resident Inspector Oconee Nuclear Station INPO Records Center Suite 1500 1100 circle 75 Parkway Atlanta, Georgia 30339.

Mr. E. L. Conner, Jr.

Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission gpV1C N'CO?T Washington, D. C. 20555 g div S 8304130138 B30325 PDR ADOCK 05000287 S PDR