05000269/LER-1982-006, Forwards LER 82-006/01T-0.Detailed Event Analysis Encl

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Forwards LER 82-006/01T-0.Detailed Event Analysis Encl
ML20052A234
Person / Time
Site: Oconee Duke Energy icon.png
Issue date: 04/16/1982
From: Parker W
DUKE POWER CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20052A235 List:
References
NUDOCS 8204280033
Download: ML20052A234 (2)
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LER-1982-006, Forwards LER 82-006/01T-0.Detailed Event Analysis Encl
Event date:
Report date:
2691982006R00 - NRC Website
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WILLI AM O. PA R et E R, J R.

Vict PatsiotNT ItttPMONE:Anta704 SitA.e PROOuCTION 373-4083 3

Mr. James P. O'Reilly, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 Re: Oconee Nuclear Station Docket No. 50-269

Dear Mr. O'Reilly:

l Please find attached Reportable Occurrence Report R0-269/82-06. This report is submitted pursuant to Oconee Nucicar Station Technical Specification 6.6.2.1.a(3), which concerns an abnormal degradation of the reactor coolant pressure boundary. This report describes an incident which is considered i

to be of no significance with respect to its effect on the health and safety of the public. My letters of March 19, 1982 and Apri1 2, 1982, addressed the delay in the preparation of this report.

V y truly your 1 I

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William O. Parker, J.

I JFK/j fw Attachment cc: Document Control Desk Records Center.

U. S. Nuclear Regulatory Commission Institute of Nuclear Power Operations Washington, D. C.

20555' 1820 Water Place Atlanta, Georgia -30339 Mr. W. T. Orders Mr. Philip.

C. Wagner i

NRC Resident Inspector' Office of Nuclear Reactor Regulation Oconee Nuclear Station U. S. Nuclear Regulatory Commission Washington, D. C.

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DUKE POWER COMPANY OCONEE NUCLEAR STATION UNIT 1 Report Number: R0-269/82-06 Report Date: April 16, 1982 Occurrence Date: March 6, 1982 Facility: Oconee Unit 1, Seneca, South Carolina Identification of Occurrence:

IB steam generator tube leak Conditions Prior to Occurrence:

100% FP Description of Occurrence: On March 5, 1982, a steam generator tube leak developed on the 1B steam generator, as indicated by an increase in the 1RIA-40 cour.t level. Based on the radiation count level increase the calculated leak rate was 0.08 gal / min.

Apparent Cause of Occurrence: The apparent cause of the tube leak was a high cycle fatigue failure. This is based on experience with similar tube failures in the Lane Region at the fifteenth tube support plate on the upper tube sheet.

Analysis of Occurrence: The last eddy current test of Tube 78-2 was performed during an outage in July 1981. No indications of tube degrada-tion were found during that insper. tion.

Personnel and systems adequately controlled this event and the releases were well within regulatory requirements. Thus, it is considered that the health and safety of the public were not affected by this event.

Corrective Action

The reactor was shut down, and the leaking tube was identified as Tube 78-2, which was stabilized from the top and explosively plugged from the bottom.

Eddy Current Testing was conducted on all tubes in the Lane Region and no other defective tubes were found.

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