ML20096A106

Suppl to Rev 1 to RO-287/83-13:containment Isolation Valve 3CS-5 Declared Inoperable Due to Leakage Past Seat. Investigation Into Valve Failure Conducted & Diaphragm Replaced

ML20096A106
Person / Time
Site:	Oconee
Issue date:	08/22/1984
From:	Tucker H DUKE POWER CO.
To:	NRC OFFICE OF ADMINISTRATION (ADM)
References
RO-287-83-13, NUDOCS 8408300497
Download: ML20096A106 (2)

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DUKE POWER GOMPANY P.O. BOK 33189 CHARLOTTE. N.C. 98242

' HAL B. TUCEER Tut.mp. sown vuis reamsment (704) Omaat

- - August 22, 1984

~ Document Control Desk U. S. Nuclear Regulatory Commission Washington, D.' C. 20555

Subject:

Oconee Nuclear Station Docket No. 50-287 R0-287/83-13. Supplement

Dear Sir:

This information supplements Reportable Occurrence Report R0-287/83-13 Revision 1 submitted January 9, 1984 concerning a containment isolation valve, 3CS-5, which was declared inoperable due to leakage past the seat.

In accordance with the corrective actions stated in the report, an invest-igation into the valve failure was conducted. During the Unit 3 End of l Cycle 7 Refueling Outage, valve 3CS-5 was checked to determine the cause for the leak past its seat. Leads to the motor were checked for proper l motor wiring connections. The bonnet and limotorque operator were removed.

The diaphragm was checked with no damage found. However, the diaphragm was replaced with a new one for the purpose of preventative maintenance.

l- The valve was cycled with no additional problems being found.

Very truly yours, 0W ,

^ - - '

Hal B. Tucker JCP: sib cc: Mr. James P. O'Reilly, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 INPO Records Center Suite 1500 1100 circle 75 Parkway Atlanta, Georgia 30339 l Mr. J. C. Bryant NRC Resident Inspector Oconee Nuclear Station 8408300497 840822 sO PDR ADOCK 05000287 l 8 PDR

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, - a Document Control Desk-August 22 -1984-E -Page 2 cc:- Ms. Helen Nicolaras Office of Nuclear Reactor Regulation

-U. S. Nuclear Regulatory Commission Washington, D. C. 20555 e