ML20086G355

Environ RO 75-25:on 751030,sewage Plant Effluent Suspended Solids Exceeded Environ Tech Spec Limit.Caused by Plugged Sludge Return Pump.Sludge Pump Cleared & Returned to Svc

ML20086G355
Person / Time
Site:	Peach Bottom
Issue date:	11/07/1975
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Boyd R Office of Nuclear Reactor Regulation
References
RO-75-25, NUDOCS 8401110253
Download: ML20086G355 (2)

Text

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. O O PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET fyq {g'- l)p

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PHILADELPHI A. PA.19101 9 121m e414000 b-

i NOV121975 -

November 7, 1975 Y.)

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Mr. Roger S. Boyd Q c;>

Acting Director Division of Reactor Licensing Of fice of Nuclear Reactor Regulations United States Nuclear Regulatory Conmission Washington, DC 20555

Subject:

Environmental Deviation The following deviation was reported to Mr. Walt Baunack, Of fice of Inspection and Enforcement, Region 1, United States Nuclear Regulatory Conmission on October 30, 1975

Reference:

License Number DPR-44/56 Environmental Technical Specifications: Section 2.2.2 Report No.: 50-277/278-75-25 Report Date: November 7,1975 Deviation Date: October 30, 1975 Facility: Peach Dottom Atomic Power Station Units 2 and 3 R.D. 1, Del ta, Pennsylvani a 17314

_!_dentification of Deviation:

Sewage plant ef fluent suspended solids in excess of the Environmental Technical Specification limit.

Description of Deviation:

A routine turbidity measurement of the effluent from the sewage plant disclosed a value of approximately 16 JTU's, which exceeded the action level for further investigation. A gravimetric ane'ysis of this sample showed that the effluent suspended solids concentt ocion was 50 ppm greater than that of the riverwater.

Designation of Apparent Cause of Deviation: '

An investigation showed that the sludge return pump was plugged.

This allowed an excessive amount of sludge to build up and carry over in the offluents.

8401110253 751107 ,aob7 PDR ADDCK 05000277 .Lu

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_ _ _ . . CDPY tEt(f REGION

Mr. Roger S. Boyd n

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O S J 77/278-75-25 November 7,1975 Page 2 Analysis of Deviation:

Because of the short period of time that the sewage plant effluent was out of specification and the high river flow at the time, no detrimental ef fects to the environment are anticipated.

Corrective Action:

The sludge return pump was cleared and returned to service.

The settling basin and chlorine contact tanks were cleaned. A follow-up sample was taken approximately four hours af ter the initial sampic and revealed that the effluent suspended solids concentration was within Environmental Technical Specification limits.

Failure Data:

Environmental Deviation Report 50-277/278-74-9; 50-277/278-74-10.

Very truly yours, 1,v -

/M.fJ.}f['f'

. f ~t) La. c Cooney O,/ '

Superintendent Generation Division - Nuclear cc: Mr. J. P. O'Reilly Director, Region 1 Office of Inspection and Enforcement United States Nuclear Regulatory Conmission 631 Park Avenuo King of Prussia, PA 19406

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