ML20086H945

Environ RO 75-6:on 750301,second Fan Lost on Cooling Tower C.Caused by Motor Bearing Oil Seal Failure.Fan H Motor Replaced

ML20086H945
Person / Time
Site:	Peach Bottom
Issue date:	03/11/1975
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Giambusso A Office of Nuclear Reactor Regulation
Shared Package
ML20086H948	List: ML20086H945 ML20086H950
References
RO-75-6, NUDOCS 8401200360
Download: ML20086H945 (2)

Text

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kl[b.'l March 11, 1975 Mr. A. Giambusso Division of Reactor Licensing Office of Nuclear Reactor Regulations United States Nuclear Regulatory (,ommission Washington, DC 20555

Subject:

Environmental Deviation The following deviation was reported to Mr. H. W. Crocker, Office of Inspection and Enforcement, Region 1 United States Nuclear

. Regulatory Commission on March 2, 1975

Reference:

License Number DPR-44/56 Environmental Technical Specifications 2.1 Report No.: 50-277/278-75-6 Report Date: March 2, 1975 Deviation Date: March 1, 1975 Facility: Peach Bottom Atomic Power Station Units 2 and 3 R.D. 1, Delta, Pennsylvania 17314 Identification of Deviation:

Loss of the second fan on the 'C' cooling tower.

Conditions Prior to Deviation:

Units 2 and 3 both operating essentially at full power.

Description of Deviation:

With the tower in service, the 'H' fan motor was observed to be vibrating excessively, and thrcwing oil from its inboard bearing.

The 'D' fan was not in service due to a previous bearing box failure.

See 50-277/278-75-3 1%oTco g

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j. ' March,II 3 197)

,- ' Ptga 2 Designat;on of Apparent Cause of Deviation: L' Motor bearing oil seal failure.

1 Analysis of Deviation:

Since there were nine of eleven f ans runninc., there were ru) significant . environmental consequences as a result of the inoperability of this fan. The water temperature leaving the tower changed only slightly. River' flows during this period were -in excess of 70,000 cfs.

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_ Corrective Action:

The 'H'- fan motor was replaced on 3/5/75 i Failure Data:

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

Very truly yours, c

M. . Cooney y As t Gen'l Superintendent Generation Division cc: Mr. J. P. O'Reilly Director Of fice of Inspection and Enforcement Region i United States Nucicar Regulatory Cc anission -

631 Park Avenue -!

King of Prussia, PA 19406 1

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