ML20086G108

Environ RO 76-34:on 760827,total Suspended Solids for Sewage Plant Effluent Exceeded ETS Limit.Caused by High Flow That Carried Solids from Aeration Tank Into Chlorine Contact Tank & Effluent.Tank Cleaned

ML20086G108
Person / Time
Site:	Peach Bottom
Issue date:	09/03/1976
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Stello V Office of Nuclear Reactor Regulation
References
RO-76-34, NUDOCS 8401100065
Download: ML20086G108 (2)

Text

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PHILADELPHIA ELECTRIC COMPANY

! 2301 MAPKET STREET PHILADELPHIA, PA.19101 (2isi e41-4ooo September 3, 1976 'T JA

%y s . g W, g y ; f e b & Q r Mr. Victor Stollo, Jr. O iD hgg"?*  ;

F Director st j

Division of Operating Reactors %9g 3 Office of Nuclear Reactor Regulations D)h #

United States Nuclear Regulatory Corraission /

Washington, DC 20555 4 ,

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Subject:

Environmental Deviation The following deviation was reported to Mr. Robert Hurd, Office of Inspection and Enforcement, Region 1, United States Nuclear Regulatory Commission on August 27, 1976.

Reference:

License Number DPR-44/56 Appendix B Environmental Technical Specifications:

Section 2.2.2 Report No.: 50-277/278-76-34 Report Date: September 6, 1976 Deviation Date: August 27, 1976 Facility: Peach Bottom Atomic Power Station Units 2&3, R.D. 1, Delta, PA 17314 Identification of Deviation:

The total suspended solids for the Unit 2 and 3 sewage plant effluent exceeded the Environmental Technical Specification 2.2.2 limit.

Conditions Prior to Deviation:

The sewage plant was in the automatic mode.

84011G0065 760903 SIM-j, PDR ADOCK 05000277 PDR g

MPY SNP REGIDI- -

O O-Mr'. Victor Stello, Jr. 50-277/278-76'-34 September 6, 1976 Page 2 Description of Deviation:

Routine analyses showed that the suspended solids concentration of the sewage plant effluent was 422 ppm and 86 ppm greater than the river sample on August 27 and August 28 respectively. In both cases the suspended solids concentration was within Technical Specification limits within one hour and in each case the duration of the deviation was shorter than two hours.

Designation of Anoarent Cause:

Increased water usage due to an increase in manpower on shift because of a Unit No. 2 outage caused high flow that carried solids over from the aeration tank .into the chlorine contact tank and from there into the effluent.

Analvsis of Deviation:

This condition existed for a short. period. Because the sewage plant flow is diluted by a factor of 50,000 with circulat-ing water flow, the suspended solide of the circulating water was not affected; therefore, the environmental impact was minimal.

Corrective Action:

The chlorine contact tank was cleaned and the settled solids were pumped out. In the future during short unit outages, temporary modifications to the sewage plant operation,that increase its capacity,will be instituted as was done during the last major outage. The Engineering Department is pursuing a permonant remedy to this problem.

Failure Data:

50-277/278-76-23, 50-277/278-76-26, 50-277/273-76-7, 50-277/278-76-6.

Very truly yours, i, >

O &t ic.. c t y M. J.' [Cooney ,/

Sup6rintendent Generation Division-Nuclear cc: Mr. J. P. O'Reilly NRC, Region 1

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