ML18081A857

Forwards LER 77-032/03L-0

ML18081A857
Person / Time
Site:	Salem
Issue date:	05/13/1977
From:	Schneider F Public Service Enterprise Group
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML18081A856	List: ML18081A855 ML18081A857 ML18081A858 ML18081A859 ML18081A860 ML18081A861 ML18081A862 ML18081A863 ML18081A864 ML18081A865 ML18081A867
References
NUDOCS 8001080498
Download: ML18081A857 (3)

Text

~derick W. Schneider Public Service Electric and Gas Company 80 Park Place Newark. N.J. 07101 201/622-7000

-e President Production May 13, 1977 Mr. James P. O'Reilly Director of USNRC Office of Inspections and Enforcements Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. O'Reilly:

LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 77-28/03L Pursuant to the requirements of Salem Generating Station Unit No. 1 Technical Specifications, Section 6.9.1, we are submitting Licensee Event Report for Reportable Occurrence 77-28/03L. This report is required within thirty (30) days of the occurrence.

Sincerely yours, CC: Director, Office of Inspection and Enforcement (30 copies)

Director, Office of Management Information and Program Control (3 copies) 8001 oso

• 4 Report Number:

e 77-28/03L Report Date: 5/2/77 Occurrence Date: 4/18/77 Facility Salem Generating Station Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Loss of New Freedom South 5024, 500kV Transmission Line.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1, 55% Reactor Power DESCRIPTION OF OCCURRENCE:

At 1550 hours0.0179 days <br />0.431 hours <br />0.00256 weeks <br />5.89775e-4 months <br />, the 2-6 and the 5-6, 500kV Bus Tie Breakers opened on protective relay actuation. This caused a loss of the 5024 500kV transmission line. This event did not cause a reduction in Reactor power or generator load because the 1-5 breaker stayed closed keeping the 5023 line energized. Technical Specification Action Statement (a) for LCO 3.8.1.1 was implemented and surveillance 4.8.1.1.1.a was com-pleted satisfactorily. The 5024 line was checked by helicopter and at 1633 hours0.0189 days <br />0.454 hours <br />0.0027 weeks <br />6.213565e-4 months <br />, re-energized. At 1634, the 2-6 breaker was reclosed and at 1635, the 5-6 breaker was closed. At this time, the 5024 was determined to be operable and the action statement terminated.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

A forest fire between towers 36/1 and 37/1 (36 miles from station) caused arcing from an insulator to ground. This arcing caused pro-tective relays to actuate isolating the 5024 line at the station and at New Freedom switching .station.

ANALYSIS OF OCCURRENCE:

Action Statement (a) for LCO 3.8.1.1 allows 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to restore an inoperable off-site circuit. The 5024 line was inoperable for 45 minutes, therefore, the LCO was not violated. Surveillance 4.8.1.1.1.a was completed satisfactorily but 4.8.1.1.2.a.2 was not accomplished because the 5024 line was returned to service and the Action Statement terminated. At no time was there any danger to the health and safety of the general public or site personnel.

- ... * :*R~por~ No .. 77-28/03L CORRECTIVE ACTION:

• 5/2/77 Investigation revealed that protective relay actuation a~ the New Freedom switching station and at the station had isolat~~ the trans-mission line. The line was checked by helicopter and nc ground fault could be found. Protective relays were reset .and the li~e returned to service.

FAILURE DATA:

Not Applicable Prepared by T. L. Spencer

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Manager - Sal~rn Gener~ting Station SORC Meeting No. 48-77

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