ML20086G253

Environ RO 76-13:on 760224,two Cooling Towers Simultaneously Inoperable.Caused by Mechanical Failure.Leaking Section of Distribution Header Repaired

ML20086G253
Person / Time
Site:	Peach Bottom
Issue date:	03/05/1976
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Stello V Office of Nuclear Reactor Regulation
References
RO-76-13, NUDOCS 8401100182
Download: ML20086G253 (2)

Text

s O O PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET PHILADELPHIA. PA 19101

. 12151 841 4oo0 March 5, 19 .;' ,.

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Mr. Victor Stello, Jr.

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Nb Director /gr d' Division of Operating Reactors p 10r', 1! 1I w,' h 1

[ j. .; ; p' , m-i Office of Nuclear Reactor Regulations -

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United States Huclear Regulatory Comission Washington, D. C. 20555 M "Vl? Ef" /

Dear Mr. Stello:

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Subject:

Environmental Deviation The following deviation was reported to Mr. Walt Baunack, Region 1, Office of Inspection and Enforcement, United States Nuclear Regulatory Comission on February 24, 1976.

Reference:

License Number DPR-44/56 Environmental Technical Speci fication: 2.1 Report No.: 50-277/278-76-13 Report Date: March 5, 1976 Deviation Date: February 24, 1976 Faci li ty: Peach Bottom Atomic Power Station. - Units 2 & 3 R.D. 1, Delta, PA 17314 Identification of Deviation:

Two cooling towers simultaneously inoperative.

Condi tions Prior to Deviation:

Units 2 and 3 operating at approximately 84% and 58% power, re s peci.i ve ly . The "A" cooling tower was out of service due to the previous lift pump failure. River flow was approximately 150,000 cfs.

Description of Deviation:

On February 24, 1976, a large leak in the south side water distribution header at the top of the "B" cooling tower necessitated the shutdown of the tower for repairs. The leak sprayed water over the side of the tower, causing ice buildup on the lower side louvers.

8401100182 760305 PDR ADOCK 0500027 9

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i Mr. V. Stello 50-277/278-76-13 March 5, 1976 Pa ge 2 1

Desi gnation of Apparent Cause of Deviation:

Mechani cal failure.

Analysis of Deviation:

4 Cifferential temperatures between Pennsylvania-Maryland State Line and the Hol twood Dam remained well within the Pennsylvania State limits during the period of time the tower was out of service. The thermal impact of this deviation is minimal due to the reduced plant i power production and high river flow.

Corrective Action:

The leaking section of the distribution header was repaired later on 2/24/76.

Failure Data:

i Last reported as Environmental Deviation Report 50-277/278-75-27.

Very truly yours,

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l . J M. J. Cooney

' Superi ntendent Generation Division - Nuclear 1

I cc: Mr. J . P. O ' Rei l ly, NRC f

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