PNO-I-86-036, on 860502,facility Lost Offsite Power to Vital Buses While Two of Four Emergency Diesel Generators Out of Svc.Caused by Technician Error.Offsite Power Restored & Alert Terminated

PNO-I-86-036:on 860502,facility Lost Offsite Power to Vital Buses While Two of Four Emergency Diesel Generators Out of Svc.Caused by Technician Error.Offsite Power Restored & Alert Terminated

ML20203Q181
Person / Time
Site:	Hope Creek
Issue date:	05/05/1986
From:	Borchandt, Summers NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:
References
PNO-I-86-036, PNO-I-86-36, NUDOCS 8605090091
Download: ML20203Q181 (1)

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OCS No: 50354860502 Date: May 5, 1986 PR' ELIMINAR'Y NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-I-86-36 1This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or.public interest significance. The information is as initially received without verification or evaluation, and is basically all that is known by the Region I

. staff on this date.

Facility: Public Service' Electric & Licensee Emergency Classification:

Gas Company Notification of Unusual Event Hope Creek Generating X Alert Station Site Area Emergency (DN 50-354) General Emergency Not Applicable

Subject:

LOSS OF OFFSITE POWER TO VITAL BUSSES At 4:00 p.m. on May 2, 1986, Hope Creek lost offsite power. Since 2 out of 4 emergency

' diesel generators were available for service at the time (which started and powered  ;

thnir respective vital busses), the licensee declared an alert per their emergency

. classification guidelines. At the time of the event the plant was in Cold Shutdown '-

Condition (Mode 5) and the number of electrical power sources available were in accor-

. dance with plant Technical Specifications. The loss of offsite power was due to a tachnician error which de-energized the only offsite power supply to the vital busses; the other source was out of service for planned maintenance. Normal, offsite power was rastored at 4:05 p.m. and the alert was then terminated. - No adverse effects occurred ,

Jas a result of the event. The Resident Inspector is on site and following the licensee's actions.

The State of New Jersey has been notified.

. CONTACT: Summers Borchardt 488-1115 609-935-5151 DISTRIBUTION:

H. St. HNBB Phillips E/W Willste Mail: ADM:DMB

. Chairman Palladino EDO NRR IE NMSS DOT:Trans only Comm. Zech PA OIA RES Comm. Bernthal ELD AE0D Comm. Roberts

-Comm. Asselstine ACRS Air Rights INP0----

SECY SP NSAC----

CA-POR Regional Offices ._, TMI Resident Section RI Resident Office Licensee:

(Reactor Licensees)

R:gion I Form 83 (R:v. July, 1984)

P 8605090091 860505 PDR ILE PNO-I-86-036 PDR

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