ML20086G194

Environ RO 76-26:on 760505,sewage Plant Effluent Suspended Solids Exceeded ETS Limit.Caused by Inoperability of Sludge Return Pump.Obstruction in Pump Removed & Sludge Removed from Settling Zone

ML20086G194
Person / Time
Site:	Peach Bottom
Issue date:	05/14/1976
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Stello V Office of Nuclear Reactor Regulation
References
RO-76-26, NUDOCS 8401100113
Download: ML20086G194 (2)

Text

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o o PHILADELPHIA ELECTRIC COMPANY 23O1 M ARKET STREET PHILADELPHI A. PA.19101

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May 14,1976 U/ $ D

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Mr. Victor Stello, Jr. t g ,

-g Di rector 3 G Division of Operating Reactors $/,s Office of Nuclear Reactor Regulations '

United States Nuclear Regulatory Commission - .. '

.h, D Washi ng ton, D.C. 20555 * ' 9'

Subject:

Envi ronmental Deviation The following deviation was reported to Mr. Walt Baunack, Office of Inspection and Enforcement, Region 1, United States Nuclear Regulatory Commission on May 5, 1976.

Reference:

License Number DPR-44/56 Appendix B Environmental Technical Speci fications: k Section 2.2.2 Report No.: 50-277/278-76-26 Report Date: May 14, 1976 Deviation Date: May 5, 1976 Faci li ty: Peach Bottom Atomic Power Station Units 2 and 3 R.D. #1, Delta, PA 17314 Identification of Deviation:

Sewage plant effluent suspended solids were in excess of the Environmental Technical Specification limit.

Conditions Prior to Deviation:

The sewage plant was in the automatic mode.

Description of Deviation:

Routine gravimetric analysis showed that the suspended solids concentration of the sewage plant effluent was 3407 ppm greater than that of the river water.

8401100113 760514 PDR S ADOCK 05000277 PDR

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a Mr. Victor Stello, Jr. 50-277/278-76-26 May 14,1976 Page 2 Designation of Apparent Cause of Deviation:

The sludge return pump was not working, causing sludge to carry over to the chlorine contact tank and discharge to the effluent.

Sludge pump inoperability was caused by an obstruction in the return pipe to the deaeration tank.

Analysis of Deviation:

The sewage plant effluents suspended solids were below the Technical Specification limits in 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or less. Because of the large dilution factor for the sewage plant effluent from the circulating water flow, the turbidity increase of the river was very minimal.-

Corrective Action:

The obstruction was removed. Sludge was removed from the settling zone and the chlorine contact tank. The sludge return pump was blown back and was returned to service.

) Failure Da ta:

Environmental Deviation Report 277/278-76-6 and 7 Very truly yours, 7,e M. Cooney r Su rintendent Generation Division - Nuclear cc: Mr. J. P. O'Reilly NRC, Region 1 b _ _ _ . _ _ _ . _ _ . . _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . . .