PNO-III-93-050, on 930901,power Supply to Plant Security Sys Failed,Causing Smoke to Fill Battery & Inverter Room. Power Was Restored to Security Sys from Alternate Power Source

PNO-III-93-050:on 930901,power Supply to Plant Security Sys Failed,Causing Smoke to Fill Battery & Inverter Room. Power Was Restored to Security Sys from Alternate Power Source

ML20203G337
Person / Time
Site:	Point Beach
Issue date:	09/01/1993
From:	Creed J, Snell W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
References
PNO-III-93-050, PNO-III-93-50, NUDOCS 9712180108
Download: ML20203G337 (1)

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Dato: 3:ptccbor 1, 1993 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PN39350 This preliminary notification constitutos EARLY notice of events of POSSIDLE safety or public interest significance. The Information is as initially recolved without verification or

' evaluation, and is basically all that is known by the Region III staff on this dato.-

Pacility Licenseo Emoraoney Classification Wisconsin Electric Power Co. General Emergency VJint Deach A and 2 Sito Area Emergency Two Creeks, Winconsin Alert fy[L Unusual Event Docket Nos. 50-266 and 50-301 X N/A #c

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Subject '

' LOSS OF SECURITY SYSTEM POWER DURING PUBLIC PLANT TOUR k

, At 12:15 p.m. on September 1, 1993, the power supply to the

'f,fb g, plant's security systems failed, causing smoke to fill the battery and inverter room. A plant tour was underway including citizen's Utility Board nombors and a print reporter in connection with a stato legislative hearing being hold in Two Crooks, Wisconsin.

The control room init4rted a fire alarm, and the plant fire brigado was dispatcLtd va the battery room. Personnel were ovacuated from the b;d ifA9 housing the battery room. Smoke was observed but thoro wort na llames.

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• Licensoo security personnel responded to check and secure vital

• area doors and patrol the protected area. At 12:32 p.m. power was rostored to the security system from an alternato power sourco.

The licensco is investigating the cause of the loss of power. The preliminary indication is that a transformor in an inverter system failed.

Both units are in operation and woro not affected by the loss of power to security systems.

NRC on-sito personnel monitored the licensoo's response to the i

incident. Region III (Chicago) is also following the licensee's activition. b.

The Stato of Wisconsin will be notified. The information in this Ok-preliminary notification has been reviewed with licensoo j managemont.

- Region III was notified of this incident about 12:30 p.myj byIthe licensoo. This information is currpnt as of 4 p.m. on September 1, 1993.

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CONTACT:

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B James Crood William Snell 708/790-5643 708/790-5513 l

, 9712180108 430901 "lmilull'llll,llL'i.l

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l PDR I&E l PNO-III-93-050 PDR

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