ML20086F826

Environ RO 77-4:on 770118,total Suspended Solids for Sewage Plant Effluent Exceeded Environ Tech Spec Limit.Caused by High Flow Period Carrying Solids Over Aeration Tank Into Chlorine Contact Tank

ML20086F826
Person / Time
Site:	Peach Bottom
Issue date:	01/28/1977
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Stello V Office of Nuclear Reactor Regulation
References
RO-77-4, NUDOCS 8401090514
Download: ML20086F826 (2)

Text

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e Mr. Victor Stello, Jr. ' . i . bs N ' %<'-~ ~~~

Dire": tor Division of Operating Peactors Office of Nuclear Reactor Regulations ,

U.S. Ihciear Ragulatory Conniasion Varbington, D.C. 20555

Dear !!r. Stello:

.E.? TICT: ENVIRO.YMENTAl OlM ,aII0}

' 3 following devie31:n .n.' sep: rte '  ? Mr. Alt Estmack, Of:Jies of

'. rpectio ad Enforcenent, ?egion I, ' dted Late's hc.'. ear it.aulatory

r.issi n .:n January 18, 1977.

Ofarenc1; I.,b rase Dd e: TPR-44'- 5.ppendix E

5. W 1.7n ,% 2.2 Envireccentsl Techni.e.t. i.aeca.ficatiens:

?.7crt No.: 50/277/278-77-1 Report Date: January 28, IS'/7 I.sviation Dste: Jamary 18, 1977 Facil:.ty: Peach Bottcm Atenic Four Staticn Unita 2 & 3 R. D. 1, f eita, f a. 17314 Idmtif.ication of Emrintio.1 The total suspenden sclids for the Uni 2 ud 3 seusre plant effluent txwede:i Ervirenzental Technical 3pecificatien 2.2.2 9-4 t.

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ThE daily turbidity measurement of the sewage plant effluent was high and a gravinetric analysis for total suspended solida was re;.n. The net total suspended solids for the sewage plant was 41 ppn greeter than the rirer sample.

Tho' 3swsge plint effluent was e.teve Technical Specifiestica limits for a :: vied of u tore than five ! m:T.

G401090514 770126 j.2'M PDR ADOCK 05000277 S PDR w -

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4r. Victor Stello, Jr. 50/277/278-77-4

• January 28, 1977 Page 2 Designation of Accarent Cause The sample was taken during a period of high flow. The greater than normal water input came from increased usage due to the Unit 3 Refueling Outage.

This high flow period carried solids over the aeration tank into the chlorine contact tank and from there into the effluent. The followup samples after the flow had returned to normal were within Technical Specifications limits.

Analysis of Deviation:

This condition existed for a short period. Because the sewage plant flow was diluted by a factor of 50,000 with circulating water flow at the time, the suspended solids of the circulating water leaving the discharge canal was not affected. Therefore, the environmental impact was min b l.

Corrective Action:

The chlorine contact tank was cleaned and the settled solids were removed. A concerted effort between Peach Bottom staff and Betz Environmental Engineers, Inc. is underway to prevent deviations caused by the sewage plant.

Failure Data:

50-277/278-77-1 50-277/278-77-37, 50-277/27d-76-34, 50-277/278-76-26, 50-277/276-7,50-277/,278-6.

Very truly yours, M.

W'

. Cooney, Superintendent G eration Division - Nuclear cc J. P. O' Reilly NBC, Regional Office

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