ML20086F828

Environ RO 77-3:on 770117,pH for Sewage Plant Effluent Exceeded ETS Limit.Caused by Influent W/Ph Slightly Lower than Normal.Sewage Plant Neutralized & Returned to Normal Operation

ML20086F828
Person / Time
Site:	Peach Bottom
Issue date:	01/27/1977
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Stello V Office of Nuclear Reactor Regulation
References
RO-77-3, NUDOCS 8401090519
Download: ML20086F828 (2)

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I PHILADELPHIA 21.ECTRIC COMPANY i

2301 MARKET STREE' PHILADELPHIA. PA.191Ci 1215)9414000 Jamery 27, 1c ,7

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Mr. '13cter Stello, Jr. h.'}W'). ~'

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Division of Operating Reactors Office :.f thciear Reactor Regulations hk, ION'M WS( /

U.S. !belear Regulatory Cc= mission Washington, D.C. 20555 Doar Mr. Stallo:

DNIRCNME'"IA; DEVIN"I'W.

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• following danatiaa van rge: wt : c Mr. Wi.' Sunsek, C:'fa + cf Insp-ction an1 Enforcenent, Region 1, N.ta.i 3:stos

• Nucle r ?ogulatcr7 C tr* ecion er. January 17, 1977.

FeDracce: License uta'aer C'?. 4Y 4 Envirt.ru-u tal Tec'r .n.n L 3pecifi<..*'cas 2.2 3 Raport So.: 50-277/2 5 77-3 Eeport Date: Jama:7 27, 1977 Deviation Date: Januar/ 17, 1977 Fsellity: Peain Eattom Atode Pouer Station (Units 2 & 3) relta, FA 17314 Ident'mfication of De'rin+, ion:

The pH for the sewage ph_t :ffluent uce'ded the Environnertal Technical Scecificttien limit. /

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5evage. ; lat cperstd rg n -- '^. , .

'Le.;;1.nion of Davide.,n1 The daily grab sanple frem the sewage plant- affluent neasured a pH of 5 5. The fochnical Specification limit is that pH shall be within the range of 6.0 to 9 0.

0401090519 770127  %$ -

PDR ADOCK 05000277 PDR S

. D O Mr. Victor Stello, Jr. 50-277/278-77-3 January 27, 1977 Page 2 Designation of Annarent Cause of Deviation:

An acidic solution may have been flushed into the sewage system and reduced the pH of the whole system; however, since no such source could be located, it is thought that the low pH of the effluent was caused by influent with pH slightly lower than normal but a pH above 6.0 coupled with the natural pH drop across the style of sewage treatment plant.

Analysis of Deviadon:

The duration of the deviation was less than one hour. Because the effluent from the sevage plant was being diluted by a factor of 50,000 at the time, the pH change in the. circulating water leaving the discharge canal was not detectable. The environmental impact was insignificant.

Corrective Action:

The sewage plant was neutralized and returned to normal operation.

A joint effort between Peach Bottom and Betz Environmental Engineers, Inc.

1: underway to optimize the operation of the" sewage plant in order to prevent Ibrther deviation of this nature.

Failure Data:

50-277/278-76-36, 50-277/278-76-42 & 50-277/278-76-43 Very truly yours, M . Cooney perintendent Generation Division - Nuclear cc: J. P. O'Reilly NBC, Regional Office

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