ML20086K258

Environ RO 74-7:on 741202,Units 2 & 3 Operated at 20% Power W/Only One Cooling Tower in Operation.Caused by Failure of Two Straps on Water Distribution Header on Cooling Tower A. Straps Replaced & Cooling Tower Returned to Svc

ML20086K258
Person / Time
Site:	Peach Bottom
Issue date:	12/12/1974
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Giambusso A US ATOMIC ENERGY COMMISSION (AEC)
References
RO-74-7, NUDOCS 8401260378
Download: ML20086K258 (2)

Text

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PHILADELPHIA ELECTRIC COMPANY f l

2301 MARKET STREET 1

PHILADELPHI A. PA.19101 (21518414000 e

December 12, 1974 f

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Mr. A. Giambusso l Deputy Director ot' Reactor Projects 4 qa s.h ,

United States Atomic Energy Commission p /y,N'" o . , - C ,j Directorate of Licensing Washington, DC 20545 6

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Dear Mr. Giambus^os 5 ( ^,

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Subject:

Environmental Deviation ,

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The following deviation was reported to Mr. Walt Be.unack, ,

A.E.C. Region 1 Regulatory Operations Office on December 3,1974. In (

accordance with Section 7.4.2.A of the Environmental Technical Speci-fications, Appendix B of DPR-44/56 for Units 2 and 3 Peach Bottom Atomic Power Station, the following report is being submitted to the Directorate of Licensing as an Environmental Deviation.

Reference:

License Number DPR-44/56 Environmental Technical Specifications Appendix B Section 2.1 Report No.: 50-277/278-74-7 Report Date: December 12, 1974 Deviation Date: December 2, 1974 Facility: Peach Bottom Atomic Power Station Units 2/3 R.D. 1, Delta, Pennsylvania 17314 r Identification of Deviation:

1 One hour outage of the 'A' cooling tower was required on 12/2/74 to make repairs on one of the wooden water distribution pipes. This re-sulted in ope.ation of Unit 2 and 3 above 20X power with only one cooling tower in operation. The 'B' cooling tcwcr has been out of service since 11/4/74 because of the failure of the lift pump.

Conditions Prior to Deviation:

' Unit 2 c,rerating at approximately 35% power and Unit operating at approximately 65% power. River flows were in excess of 25,000 cubic feet per second. 7 _

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- illa prNy G401260378 741212 @n' gDRADOCK 0500027 12G42 COPY SENT REGION Y ,3

Mr. A. Gicmbusso' ( j CJ D;c;m'ser 12, 1974 Paga 2 4

Description of Deviation: .

During a routine inspection of the cooling towers, it was noted that two of the straps which hold the wooden distribution headers together were broken on one of the cooling tower distribution beaders.

In order to replace these broken straps, the cooling tower was taken out of service for approximately one hour.

Ocsignation of Apparent Cause of Deviation:

Failure of two straps on the water distribution header on the 'A' cooling tower.

Analysis of the Deviation:

Because of the high river flows, relatively low plant power, and short duration of the outage, no adver se effects to plankton and "' '

fishes is anticipated. Temperature distributions did not vary signifi-cantly during this period.

Corrective Action:

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The 2 broken straps were replaced and the cooling tower was returned to service.

Failure Data:

No previous failures of this type. --

Very truly yours,

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/ /'/l.-t,.t M. J- Cooney

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Ass.'t Gen't Superintendent Generation Division cc: 'Mr. J. P. O'Reilly Director, Region i

/ United States Atomic Energy Commission 631 Park Avenue King of Prussia, PA 19406 t

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