PNO-IV-85-064, on 851212,lightning Strike During Severe Electrical Storm Caused Loss of All Offsite Power at Facility.Caused by Problem W/Operation of Trip Function of Breakers in Offsite Switch Yard

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PNO-IV-85-064:on 851212,lightning Strike During Severe Electrical Storm Caused Loss of All Offsite Power at Facility.Caused by Problem W/Operation of Trip Function of Breakers in Offsite Switch Yard
ML20138J477
Person / Time
Site: Waterford Entergy icon.png
Issue date: 12/13/1985
From: Gagliardo J
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
To:
References
PNO-IV-85-064, PNO-IV-85-64, NUDOCS 8512170531
Download: ML20138J477 (1)


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d Decenber 13, 1985 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-IV-85-64

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b This 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 IV staff on this date.

FACILITY: _ .

Licensee Emergency Classification:

- Louisiana Power & Light Company Notification of Unusual Event

. Waterford 3 Alert

- Taft, Louisiana Site Area Emergency

. Docket:No. 50-382 General Emergency

[ X Not Applicable

SUBJECT:

LOSS OF 0FFSITE POWER

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. A lightening strike during a severe electrical storm caused a loss af $11

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offsite power at Waterford 3 Steam Electric Station for approximately one-half.

' - hour beginning at 7
26.p.m. CST on December- 12, 1985. The plant had been shut c down.for maintenance since December 9, 1985. The loss of power appears.to have been caused by a problem with the operation of trip function of breakers in the offsite. switch yard., A complete loss of power to the grid was experienced.

Two fossil units connected to this ring bus also tripped. The emergency diesel generators started and supplied power to vital loads as designed. All onsite

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systems functioned as expected.

9 LP&L does not intend to issue a press relcase. News me.dia interest is not .

L expected. ,

A The licensee is following up to establish further details and an update

% notification will be released later today.

c) Region IV received notification of- this occurrence by telephone from the Headquarters operations "ficer at 10:06' p.m. CST, December .12,1985' .

The. state of Louisiana has been informed.

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CONTACT: J. E. Gagliardo, FTS 728-8141 1 DISTRIBUTION:

2 fiAIL:

H. St. MNBB E/W' Willste ADM:DMB (Original)

. Chairman Palladino ED0 IE NMSS D0T:(Trans only)

.Comm. Zech PA OIA RES Comm.:Bernthal ELD AEOD FAX:

Com. Roberts MPA VIB INP0

- Conn. Asselstine .

i NSAC ACRS Phillips i RRI

.SECY- -NRR SP (Air J

CA DCS Rights)

PDR LICENSEE:

Regional Offices (Reactor Licensee)

RIV:DRS RA b Johnson /lk RDMartin tz./g /85 s512170531 e51213 k

\ /Q/85  %-IN5-064 PDR )

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