ML20086G412

Environ RO 75-17:on 750831,significant Leak on Cooling Tower a Lift Pump Packing Gland Required Removal of Pump from Svc. Caused by Failure of Supports for Lift Pump Lower Guide Bearing.Corrective Action to Be Determine After Dismantling

ML20086G412
Person / Time
Site:	Peach Bottom
Issue date:	09/10/1975
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Boyd R US ATOMIC ENERGY COMMISSION (AEC)
References
RO-75-17, NUDOCS 8401110350
Download: ML20086G412 (2)

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September 10, 1975 /.':1 ff.

Mr. Roger S. Boyd Acting Director Divis%on of Reactor. Licensing

• Of fice of Nuclear Reactor Rcjalations United States Nuclear Regalatory Cocmission Washington, DC 20555

Subject:

Environmental Deviation The following deviation was reported to Mr. Eldon Brunner, Of fice of Inspection and Enf orcement, Region 1, United States Nuclear Regulatory Commission on August 31, 1975

Reference:

License Number DPR-4'i/56 '

Environmental Technical Specifications Reference 2.1 Report No.: 50-277/278-75-17 Report Date: September 10, 1975 Deviation Date: August 31, 1975 Facility: Peach Bottom Atomic Power Station Units 2 and 3 R.D. 1, Delta, Pennsylvania 17314 Ident if ication of Deviatlon:

Inoperability of the 'A' cooling tower with river flows less than 10,000 cfs. .

Conditions Prior to Deviation: ~

Doth units operating at approximately 55% power.

gp Description of Deviation: '

f} 1&o A significant Icak on the 'A' cooling tower lift pump packing gland required removal of the pump from scr vice; Designation of Apparent Cause of Deviation:

Investigation of the cause of the packing gland look has determined that the supports for the lift pump lower guide bearing have failed.

8401110350 750910 PDR ADOCK 05000277 9784 S PDR COPY SENT REGION _ /

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, , V V Mr. Roger S. Boyd 50-277/278-75-17 September 10, 1975 -

Page 2 Analysis of Deviation:

Loss of the ' A' cooling tower during low river flows will result in higher plant di f ferential tei..peratures and addi tional heat input to the river. Operating criteria established by the Pennsylvania Department of Environmental Resources will not be violated. River temperatures are remaining within specified liuits. Significance of the deviation is minimized because of the present reduced power operation of both units.

Correct i ve Act ion:

Investigation into the cause of the packing leak has determined that the lower guide bearing to the lif t pump has failed. This will require a major dismantling of the pump and motor. Corrective action will be determined following dismantling.

Failure Data:

A similar failure on the 'B' cooling tower lift pump occurred in November 1974. This was reported as Environmental Ocviation 50-277/

278-74-5 Very truly yours, M. 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 S

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