ML20086G409

Environ RO 75-18:on 750914,second Fan on Cooling Tower C Failed.Cause Under Investigation.Fan Returned to Svc W/O Excessive Vibration

ML20086G409
Person / Time
Site:	Peach Bottom
Issue date:	09/24/1975
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Boyd R US ATOMIC ENERGY COMMISSION (AEC)
References
RO-75-18, NUDOCS 8401110343
Download: ML20086G409 (2)

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- PHILADELPHIA ELECTRIC COMPANY ,-- ~

2301 MARKET STREET "

PHILADELPHIA. PA.19101 i A mmemawo l';i 4

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. September 24, 1975 b E d'

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M.. Roger S. Boyd l Acting Director Division of Reactor Licensing ,

Office of Nuc1 car Reactor Regulations United States Nuclear Regulatory Commission Washington, DC 20555

Subject:

Environmental Deviation l

The following deviation was reported to Mr. Walt Baunack, Office of Inspection and Enforcement, Region 1, United States Nuclear '

Regulatory Ccanission on September 15, 1975

Reference:

License Number DPR-44/56 Environmental Tethnical Specifications Reference 2.1 Report No.: 50-277/278-75-18 Report Date: September 24, 1975 Deviation Date: September 14, 1975 Facility: Peach Bottom Atomic Power Station Units 2 and 3 R.D. 1, Del ta, Peniisylvani a 17314 Identification of Deviation:

Loss of a second fan on the "C" cooling tower.

Condit ions Prior to Deviation:

Both units at about 55% power.

Description of Deviation:

With the tower in service, the 'E' f an tripped due to a high vibration signal, while the 'F' fan was out of service for maintenance.

Designation of Apparent Cause of Deviation:

Under investigation.

8401110343 750924 10263 PDR ADOCK 05000277 S PDR COPV SENT REGION

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. O .~ O Mr. Rogey S. Boyd . ,

September 24, 1975 ,

Page 2 s

Analysis of Deviation _:

The 'C' fan was out of service for about 30 minutes. Due to the reduced plant power level and the short duration of the fan outage, no significant environmental impact resulted.

Corrective Action:

• The f an was returned to service without excessive vibration.

Failure Data: .

Environmental Deviation Reports 50-277/278-74-2, 50-277/278-75-1, 50-277/278-75-8 and 50-277/278-75-10.

Very truly yours, M. Cooney Ass t Gen'l Superintendent Generation Division cc: Mr. J. P. O'Reilly Director, Region 1 Office of Inspection and Enforcement United States Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 i

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