05000272/LER-1977-037, Forwards LER 77-037/03L-0
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- I Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201/622-7000 Mr. James P. O'Reilly Director of USNRC June 2, 1977 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 77-37/03L 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 77-37/03L.
This report is required within thirty (30) days of the occurrence.
Sincerely yours,
/)'l/41-: ------,\\
Frank P. Libri~~i General Manager -
Electric Production CC Director, Office of Inspection and Enforcement (30 copies)
Director, Office of Management Information and Program Control (3 copies)
The Energy People
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Report Number:
Report Date:
Occurrence Date:
Facility 77-37/03L 5/18/77 5/14/77 Salem Generating Station Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038
- IDENTIFICATION OF OCCURRENCE:
Loss of Off Site Power Source (5023, SOOkV Transmission Line)
CONDITIONS PRIOR TO OCCURRENCE:
Operational Mode 1, Reactor Power 90%
DESCRIPTION OF OCCURRENCE:
At 1444 hours0.0167 days <br />0.401 hours <br />0.00239 weeks <br />5.49442e-4 months <br />, the 5023, 500kV transmission line tripped on protective relay actuation.
The Shift Supervisor implemented Technical Specifica-tion Action Statement 3.8.1.1.a.
Surveillance Test 4.8.1.1.1.a and 4.8.1.1.2.a.2 were performed with satisfactory results.
The 5023 line was patraU.ed by helicopter and at 1640 hours0.019 days <br />0.456 hours <br />0.00271 weeks <br />6.2402e-4 months <br />, was re-energized.
Action Statement 3.8.1.1.a was then terminated.
DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:
A forest fire between towers 36/1 and 36/3 (36 miles from station) caused arcing to ground which actuated the protective relays.
The line was isolated at the New Freedom switching station, as well as the Salem switchyard.
ANALYSIS OF OCCURRENCE:
Technical Specification 3.8.1.1.2 allows 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to restore an inoper-able off site transmission line,.. provided that the operability of the remaining AC power sources is demonstrated.
Surveillance 4.8.1.1.1.a and 4.8.1.1.2.a.2 were performed with satisfactory results and the 5023 line was returned to service within the time allowed, therefore, the limiting condition for operation was not violated.
At no time was there any danger to the health and safety of the general public or site personnel.
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CORRECTIVE ACTION
Personnel from the Transmission and Distribution Department patrolled the 5023 line by helicopter.
Protective relays were reset and the line
.re-energized.
FAILURE DATA:
Not Applicable Prepared by T. L. Spencer
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Manager - saiem Generating Station SORC Meeting No. ~~~~~~~~~
54-77