ML20086H911

Environ RO 75-12:on 750619,second Cooling Tower Removed from Svc within Allowable 48 H Maint Period.Caused by Failure of Banding Around Distribution Header Which Resulted in Blowout of Portion of Wooden Structure

ML20086H911
Person / Time
Site:	Peach Bottom
Issue date:	06/27/1975
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Giambusso A Office of Nuclear Reactor Regulation
References
RO-75-12, NUDOCS 8401200342
Download: ML20086H911 (2)

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June 27,1975

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Mr. A. Giambusso -

Director Division of Reactor Licensing Office of Nuclear Reactor Regulations United States Nuclear Regulatory Conmission Washington, DC 20555

Subject:

Eneironmental Deviation The following deviation was reported to Mr. Walt Baunack, Office of Inspection and Enforcement, Region 1, United States Nuclear Regulatory Commission on June 19, 1975

Reference:

License Number DPR-44/56 Environmental Technical Specifications 2.1 Report No.: 5D-277/278-75-12 Report Date: June 27, 1975 Deviation Date: June 19, 1975 Facility: Peach Bottom Atomic Power Station Units 2 and 3 R.D. 1, Delta, Pennsylvania 17314 Identification of Deviation:

Removal of a second cooling tower from service within the al.lowabic 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> maintenance period.

C_onditions Prior to Deviation:

With the 'C' cooling tower out of service for scheduled main-tenance (less than 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />) the 'A' cooling tower was removed from service due to a qross leak on the distribution header.

Designation of Apparent Cause of Deviation:

Failure of the banding' around the distribution header ich resulted in the blowout of a portion of this wooden structure.

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. Mr. A. Giambus 50-277/278-75-12 June 27,1975 Page 2  : ,

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Analysis of-Deviation:

.f The 'A' tower was out of service for approximately 16 hours1.851852e-4 days <br />0.00444 hours <br />2.645503e-5 weeks <br />6.088e-6 months <br />.

There was no significant effect on the ecology of the river. Both the

'A' and 'C' cooling towers were returned to service on Friday, June 20, 1975 River flow during this period was in excess of 36,000 cfs.

Corrective Action:

The damaged wooden planking was replaced by a steel band secured by stainless steel clamps. The tower was returned to service.

Failure. Data: '

Environmental Deviation Reports 50-277/278-74-2, 50-277/278-75-1, 50-277/278-75-2, 50-277/278-75-6, 50-277/278-75-8, 50-277/278-75-10 end 50-277/278-75-11.

Very truly yours, M. . Cooney Ass t Gen't Superintendent

, Generation Division cc: Mr . J. P . O 'Re i l l y.

Director, Region-1 Office of Inspection and Enforcement United St,ates Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 i

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