05000270/LER-1982-001, Forwards LER 82-001/01T-0.Detailed Event Analysis Encl

Forwards LER 82-001/01T-0.Detailed Event Analysis Encl

ML20040G707
Person / Time
Site:	Oconee
Issue date:	01/29/1982
From:	Parker W DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20040G708	List: 05000270/LER-1982-001, Forwards LER 82-001/01T-0.Detailed Event Analysis Encl 05000270/LER-1982-001-01, /01T-0:on 820117,reactor Bldg Equipment Hatch Found Leaking Air Through Gap in Seal.Caused by Personnel Not Verifying Good metal-to-gasket Seal Had Been Made. Procedures Revised to Require Verification of Proper Seal
References
NUDOCS 8202160390
Download: ML20040G707 (2)

LER-1982-001, Forwards LER 82-001/01T-0.Detailed Event Analysis Encl

Event date:
Report date:
2701982001R00 - NRC Website

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VICF Pat 9eorar TetcPwowc:Anta704 siu e.oouction January 29, 1982 373. oe3

,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. 50-270

Dear Mr. O'Reilly:

Please find. attached' Reportable Occurrence Report R0-270/82-01. This repsrt is submitted pursuant to Oconee Nuclear Station Technical Spec-ification 6.6.2.1.a(2) which concerns an operation subject to a limiting condition for operation which was less conservative than the least con-servative aspect of the limiting condition for operation established in the Technical Specifications, and describes an incident which is considered to be of no significance with respect to its effect on the health and safety of the public.

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l DUKE POWER COMPANY OCONEE NUCLEAR STATION UNIT 2 Report Number: R0-270/82-01 Report Date: January 29, 1982 Occurrence Date: January 17, 1982 Facility: Oconee Unit 2, Seneca, South Carolina Identification of Occurrence: Reactor Building Equipment Hatch not properly seated.

Conditions Prior to Occurrence: Refueling Shutdown Description of Occurrence: On January 17, 1982, during defueling operations, the Reactor Building equipment hatch was found to be leaking air through a gap of-approximately \\ to inch in the seal at the bottom of the hatch.

Apparent Cause of Occurrence: The apparent cause of this incident was personnel error, in that the crew that reinstalled and secured the hatch did not verify that a good metal-to-gasket seal had been made.

Analysis of Occurrence: Twenty-six fuel assemblies had been moved during the fourteen hour period with the hatch improperly seated. The Reactor Building purge fan was on during this period, and air flow through the gap was into the Reactor Building. If a fuel assembly had been dropped-during this time, the fuel would not have been uncovered since the refueling canal was full of borated water. - Due to the small size of the gap and the short duration of the incident, it is felt that this incident 'ed no signifi-cant effect on the health and safety of the public.

Corrective Action

Fuel handling was stopped and the equipment hatch was properly sealed. The appropriate procedure has been revised to require an inspection of the sealing surfaces to meet the intent of Technical Spec-ification 3.8.6, during fuel handling operations. The crew-involved in this incident has been counseled, and appropriate maintenance' personnel will review this incident by February 10, 1982.