ML20009C173

Forwards LER 81-012/03L-0.Detailed Event Analysis Encl

ML20009C173
Person / Time
Site:	Oconee
Issue date:	06/05/1981
From:	Parker W DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009C174	List: ML20009C173 ML20009C181
References
NUDOCS 8107200345
Download: ML20009C173 (2)

Text

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DUKE P6Wsn COMPANY ,

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w t LLI AM O. PAR M E R, J R.

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373 4093

$rca PacowCtion Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, Suite 3100 .g 4

Atlanta, Georgia 30303 /c NL ' (((f Jl LI U

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Re: Oconee Nuclear Station  ; JUL 1 'T 1991

• L Docket No. 50-270 - di

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Dear Mr. O'Reilly:

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Please find attached Reportable Occurrence Report R0-270/81-12. 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 with respect to its effect on the ,

health and safety of the public.  :-(.

Very truly yours, o

j William O. Parker, Jr.

JLJ/cj s Attachment cc: Director Mr. Bill Lavallee Office of Management & Program Analysis Nuclear Safety Analysis Center U. S. Nuclear Regulatory Commission P. O. Box 10412 Washington, D. C. 20555 Palo Alto, California 94303 I

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Sti 8107200345 810605 PDR ADOCK 05000270 PDR S

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• DUKE POWER COMPANY OCONEE UNIT 2 Report Number: R0-270/81-12 Report Date: June 5, 1981 Occurrence Date: May 6, 1981 Facility: Oconee Unit 2, Seneca, South Carolina Idenification of Occurrence: TDEFWP Declared Inoperable Due to Low Oil Level Conditions Prior to Occurrence: 100% FP Description of Occurrence: At approximately 0013 hours1.50463e-4 days <br />0.00361 hours <br />2.149471e-5 weeks <br />4.9465e-6 months <br /> on May r., 1981, the Unit 2 Turbine Driven Emergency Feedwater Pump (TDEFW2) oil sump was discovered empty. The control switch for the TDEFWP in the " Lockout" position to prevent automatic starting of the TDEFWP, and the TDEFWP was declared inoperable.

This constitutes operation in a degraded mode per Technical Specification 3.4.1.C, and is thus reportable pursuant to Technical Specification 6.6.2.1.b(2) .

Apparent Cause of Occurrence: It is not known what caused the TDEFWP oil sump to be empty.

Analysis of Occurrence: Both motor driven EFW pumps were operable at the time that the TDEFW pump was inoperable. The motor driven pumps would have started automatically on a loss of feedwater to provide the total [. .

amount of auxiliary feedwater flow required for removal of decay heat. ~;

The health and safety of the public was not jeopardized by this incident.

Corrective Action: When the TDEFWP oil sump was discovered empty, the pump control switch was placed in the " locked out" position to prevent an automatic start of the pump. The oil level of the tank was restored to normal within 47 minutes of the discovery.

The basement NEO turnover sheets for each unit have been changed to require that the levels of the oil tanks being recirculated by the purifier are checked both before and after the tanks are put into recirculation.

Procedure changes have been made to the Unit 1, 2 and 3 oil purifier operating procedures to change the shutdown sequence such that even if there is a valve misalignment, the probability that the oil will be pumped out ,

of any of the FWPT or EFWPT oil tanks during the shutdown process will be decreased.

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