ML20065K114

NPDES Noncompliance Notification:On 940407,fecal Coliform Limitation Exceeded During Upset of Sewage Treatment Plant 2B (DSN011),as Result of Influent Flow Surge.Caused by Temporary Hydraulic Overload.Chlorine Feed Rate Maximized

ML20065K114
Person / Time
Site:	Farley
Issue date:	03/14/1994
From:	Dennis Morey SOUTHERN NUCLEAR OPERATING CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
ENV-94-092, ENV-94-92, NUDOCS 9404190174
Download: ML20065K114 (3)

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Southern Nuclear Operating Company s sPost Othee Dot 1295 g Birmingham. A!acama 35201 Teiephone (205) BE8 5131 L

o. e n ,ey Southern Nudear Operating Company vice Premcent Fartet Prciect Ihe sOUthem electnc System March 14, 1994 Docket Nos 50-348 50-364 U. S. Nuclear Regulatory Ceminission ATTN: Document Control Desk Washington, DC 20555 Joseph M. Farley Nuclear Plant NPDES Penuit Nongsmpliance Gentlemen:

Enclosed in accordance wil Section 3.2 of the Joseph M. Farley Nuclear Plant Environmental Protection Plan (Units I and 2), Appendix B to Facility Operating Licensa Nos.

NPF 2 and NPF-8, is a copy of a report submitted to the Alabama Department of Environmental Management concerning a noncompliance with National Pollutant Discharge Eliminatior: System (NPDES) Permit Number AL0024619.

Should you have any questions, please advise.

Respectfully submitted, 99}w "

Dave N. Mor y LPD: sis ENV-94-092 Enclosure cc: Squthem Nudgar Opriating.famp_any R. D. Hill, Plant Manager

.U. S. NucisatJ1gggjatary_

a Commission. Wghington. DC D. L. Siegel, Licensing Project Manager U. S Nuclear Regulatory Cor, mission. Reuion_I] -

S. D. Ebneter, Regional Administrator ,.g l T. M. Ross, Senior Resident Inspector -

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9404190174 940314 i PDR ADOCK 05000348 s PDR

P l Couthem Nuclear Operatirg company d Post Ofree Box 1895

.- ? Birmingham. Alabama 35201 1295 Ts4 phone 205 868 5000 Rn Southern Nudear Operating Company the. southern electric system ENV-94-091 April 13, 1994 VIA TELEFAX AND VIA CERTIFIED MAIL. P.ETURN RECElPT REQUESTED FARLEY NUCLEAR PLANT NPDES Permit No. ALOO24619 Mr. Charles R. Horn, Chief Water Division Alabama Department of Environmental Management 1751 Cong. W. L. Dickinson Drive Montgomety, AL 36109-2608

Dear Mr. Hom:

Pursuant to the provisions of Part I.C.2.a of the above referenced NPDES permit, the enclosed report is submitted to the Division. This report provides information concoming an exceedance of the discharge limitation for Fecal Coliform at DSN011 -

Sewage Treatment Plant 28 as a result of an upset. This incident was verbally reported to the Division on April 8,1994.

If you have any questions or require additionalinformation, please contact Lei 2 Daniels at 868-5937.

Sincerely, N.Y.W Q W. C. Carr Manager, Environmental Services WCC/LPD:sts Enclosure cc: J. M Coles l

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' ALABAMA DEPARTMENT OF ENVIROhMAL hANAOD4ENT WATERDIVIS10N D4DUSTFJALBRANCH NONCOMPLIANCE NOTIFICATION FORM PERMUTEE NAME: Southem Nuctaar Oneratira Crwrmany - Farlev Nuclear Ptant PERMriNUMBER. ALOO24619 FACILITY LOCATION: lhuston County.Fichway 95 South Cohrm%. AL DMR REPORTING PERIOD: Second Quarter 1994 L DESCRIP110N OF DISCHARLi Discharge flow fmm SewaEe Treatment Plant 2B (DSN011)

NONCOMPLIANCEPARAMETER(S):

Focal editorm sample take durms Upset ecodition exceeded 300 e g/100 ml licutatiau.

No other permit limitauens were exceeded.

CAUSE OF NONCOMPLIANCE: (Attach addiumal ;mges if nooessary)

An Upset of Sewage Treatment Plant 2B (DSN0ll) occumd when an influent Gow surge caused a tanparary hydraulic overload.1he bydraulie overload resulted in canyour of wastewater from the clarifier into the chlonne acutact chamber and a correspooding decrease m chlorme contact time. Due to the short duration of the Dow increase, investigation into the root cause of the Upect has been inconclusive.

2 PERIOD OF NONCOMPLIANCE: (include exact date(s) an.f time (s) or,if not corrected, the anticipated time the noncogliance is expected to continue):

The Upset occurred on April 7,1994 from approximately 10.45am to 11:25am (40 minute total duration).

3. DESCRIPI1ON OF STEPS TAKEN ANIlOR BED 40 TAKEN TO REDUCE OR ELIMD4 ATE THE NONCOMPLYING DISCHARGE AND TO PREVENT ITS RECURRENCE (attach additional pages if necessary):

Phet pmannel were present at Sewage Treatment Plant 2B when the Upset occurred and immedately took the following corrective actions:

• Chlorine food rate was maurmzed to provide additional disinfection capacity.

• Solids were pu:nped from the chlorinz contact chamber back to the aeration zone, e Studge was subsequently removed from the seration zone to reduce organic loading.

a influent sources (restmams, ete ) were inspected to deternune the source ofincreased flow. Results of the ms% were inanaelusin.

A new sewage plant which will reptars the existing newage treatment plants has been constructed and will begin operation in approximately 30 days.

Richard D Hill Gewal Mataner - Farlev Nuclent Plant NAME AND Trn.E OF RESPONSIBLE OFFICIAL (type or print)

J Y NATORS OF RESPONfiIBG OFFICIAL DATE SIGNED 4