ML20137A107

NPDES Noncompliance Notification:On 851011,39 Ppm Total Suspended Solids Discharged to Cooling Lake at High Flow Rate.Investigation Underway.Waste Neutralization Tanks Will Be Discharged to Cooling Lake at Low Flow Rate

ML20137A107
Person / Time
Site:	LaSalle
Issue date:	11/08/1985
From:	Diederich G COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 8511250414
Download: ML20137A107 (3)

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Commonwealth Edison LaS: lie County Nacizr Station ggf ,j Rur:I Ftouti ct, Box 220 Marseilles, Illinois 61341 Telephone 815/357-6761 935$h,h of _

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November 8, 1985 r , Li'

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Mr. James G. Keppler ..

Regional Administrator Region III U.S. Nuclear Regulatory Commiasion 799 Rcosevelt Road Glen Ellyn, Illinola 60137

Dear Mr. Keppler:

In accordance with LaSalle County Station Milt 1 and Unit 2 Facility Operating License NPF-11 and NPF-18, Appendix B, Sectica 3.2, we arr submitting to you a copy of the NPDES noncompliance for LaSalle County Nuclear Generating Station Permit No. IL00h8151.

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v G. J. Diederich Static. Manager

. LaSalle County Station GJD/FRL/SKS/kg i

Encloaure s

xc: NRC Resident Inapector INP0 - Recorda Center US NRC Document Centrol Deak NOV 121185 0511250414 051108 PDR J ADOCK 05000373 PDR

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Commonwcalth Edison o

~l LaSatie County Nuclear Station

' RuralRoute #1. Box 220 V Marseilles. lit nois 61341

. Telephone?15/357 67f1 October 15, 1985 U. S. Environmental Protection Agency i , Region V, Enforcement Division

ATTN: Chief. Compliance Unit 230 South Dearborn Street Chicago, IL 60604 1111no.ts Environmental Protection Agency Divisio1'of Water h>11ution Control Compliance Management Unit 2200 Churchill Road Springfield, IL 62706

Subject:

NPDES Noncompliences (or LaSalle County Nuclear Generating Station - Permit No. ILOO48151

-e In accordance with Standard Condition 12, we wish to submit the following botice of noncompliances which are listed on the attached table.

If there are any questions, please contact Steve Davis of my staff at (815)35]-6761, extension 487. l l

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/l' 0 G. J. Diederich l Station Manager GJD/FRL/RHK/msh ac: Director of Water Quality Environmental Affairs Manager, tiuclear Stations Division s

a DOCUMENT ID 0070h/0250A

/- os f LASALLE COUNTY NUCLEAR GENERATING STATION C.P.D.E.S. PERMIT NO: ILOO48151 WONCOMPLIANCE REPORT DISCHARGE NUMBEP_AND DESCRIPTION: 001(a) Demineralizer Regenerant Vastes 0

PARAMETER ANL PERMIT LIMIT: Total Suspended Solids, 30 ppm daily maximum J

NONCOMPLIANCE, DATE, AND DURATION:

39 ppm Total Suspended Solids, 110CT85, 7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br /> b

CAUSE OF NONCOMPLIANCE:

ll Most discharges of the Waste Neutralization Tanks (W.N.T.) are routed to the Wastewater Treatment Facility (W.W.T.F.) at a low flowrate (< 100 ]

GPM), thus allowir.g solids to settle in the lowpoint of the W.N.T.

discharge piping. Occasionally V.N.T.'s are discharged to the cooling lake at a high flowrate (1 500 GPM), apparently dislodging the  !

accumulated solids in the lowpoint of the discharge pipe, and creating a  ;

solids excursion. Pre-discharge samples are drawn off the recirculation piping of the W.N.T., and are representative only of the contents of the tank.

CORRECTIVE ACTION: '

An investigation into possible solutions to the problem of dislodging accumulated solids in the lowpoint of the discharge pipe is underway. In the meantime, V.N.T. 's discharged to the cooling lake will only be performed at a low flovrate (< 100 GPM). The standstill scid sump will be cleaned. Also, any solids on tne floor in areas which drain to the acid sump will be cleaned, s

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DATE RECOGNIZED AS A VIOLATION: 120CT85 DATE INVESTIGATED: 150CT85 _

i DOCUMENT ID 0070h/0250A