ML20003B096

Forwards LER 81-003/01T-0

ML20003B096
Person / Time
Site:	Peach Bottom
Issue date:	01/27/1981
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20003B097	List: ML20003B096 ML20003B104
References
NUDOCS 8102100349
Download: ML20003B096 (2)

Text

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PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET P.O. BOX 8699 PHILADELPHIA. PA.19101 12156841 4000 January 27, 1981 Mr. Boyce H. Grier, Director Office of Inspection and En forcement Region I US Nuclear Regulatory Ccmmission 631 Park Avenue King of Prussia, PA 19406

SUBJECT:

LICENSEE EVENT REPORT HArtRATIVE DESCRIPTION

Dear Mr. Grier:

The following was reported to Mr. C. Cowgill, Region I, Office of Inspection and Enforcement on January 13, 1011.

Reference:

Docket No. 50-273 Report No.: 3-81-03/1T Report Date: .

January 27, 1.931 Occurrence Date: January 13, 1981 Facility: Peach Bottom Atomic Power Station RD #1, Delta, PA 17314 Technical Specification

Reference:

Technical Specification 3.5.C.1 requires in part that "The HPCI Subsystem shall be operable whenever there is irradiated fuel in the reactor vessel, reactor pressure is greater than 105 psig, and prior to reactor startup..."

Prompt reporting requirements established in IE Bulletin 30-17.

Description of the Event During a Surveillance Test of the HPCI auxiliary oil pump, an oil leak of about 3 to 5 GPM was discovered on the oil supply line to the turbine manual /overspeed trip mechanism.

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l- Page 2 Probable Consequence of th'e Occurrence The Surveillance Test did not require HPCI turbine operation, therefore, there was no possiblity of damage to the HPCI bearings. If the HPCI turbine had been started with oil leaking from the line, oil would still have been supplied to the bearings for about thirty minutes at reduced pressure. At that point a turbine bearing low pressure alarm would have been received.

Remaining ECCS systems were immediately verified to be operable Cause of the Event:

The cause of the oil leak was determined to be a ruptured diaphragm in the control valve on the oil supply line to the tarbine manual /overspeed trip mechanism.

Corrective Actions:

The diaphragm was replaced and the HPCI system satisfactorily tested and returned to service on January 13, 1981.

Very truly yours,

• W '

M. J ,Cooney Sup intendent Generation Division - Nuclear At tac hmen t ec: Director, NRC - Office of Inspection and Enforcement Mr. Norman M. Haller, NRC - Office of Management &

Program Analysis

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