ML19346A399

NPDES Noncompliance Notification:Ph for Yard Drainage Pond Effluent Samples Were Either Below or Above Permit Limitation of 6.0-9.0 Units.Investigation of Makeup Water Treatment Plant Demineralizer Regeneration Sys Underway

ML19346A399
Person / Time
Site:	Sequoyah
Issue date:	06/16/1981
From:	Elashry M TENNESSEE VALLEY AUTHORITY
To:	Patrick J ENVIRONMENTAL PROTECTION AGENCY
References
TNOO26450, NUDOCS 8106190271
Download: ML19346A399 (2)

Text

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TENNECCEE VALLEY AUTHORITY Nonnes. TENNE 9sta 37828 215 Natural Resources building 4 1 6 1981 i JUNE Hr. James R. Patrick, Jr. , Deputy Chief e i

.g Compliance Branch, Enforcement Division -

Environmental Protection Agency, Region IV !2 j N ll.2 84s, g g7Nkl ' .

345 Courtland Street, NE Y WsID0er Atlanta, Georgia 30365 s

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Dear Mr. Patrick:

NIh NOTIFICATION OF NONCOMPLIANCE WITil EFFLUENT LIMITATIONS - NPDES PERMIT NO. TN0026450 - SEQUOYAll NUCLEAR PLANT Description of the discharge--D.Iecharge No. 007 - Yard drainage pond effluent. The samples listed below were either below the minimum permit limitation for pH of 6.0 units or above the maximum permit limitation for pl! of 9.0 units. ,

Date (1981) pH (units) 3/20 9.1 3/22 9.1 3/28 , 2.3 4/28 9.3 5/15 9.7 5/15 10.7 5/26 3.2 '

_Cause and period of the noncompliance--Demineraliter regeneration wastes from the makeup water treatment plant are discharged into the station sump (Serial No.'010) which discharges into the yard drainage pond. Discharges of these wastes caused the noncompliances listed above. Yard drainage pond effluent '

samples collected the day before and the day after each of these noncompliances had pli values within the permit limitations of 6.0 - 9.0 units. Therefore, each period of noncompliance was less than 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />. Several pil grab samples collected from the diffuser discharge indicate that these discharges were neutralized before they reached the Tennessee River.

Steps taken to reduce, eliminate, and prevent recurrence of the noncomplying discharge--An investigation of the makeup water treatment plant demineralizer regeneration system has begun and is expected to be complete by July 1,1981.

Any anomalies in either operational procedures or equipment will be corrected.

Also, a design change request was issued to modify the way the regeneration wastes are discharged into the station sump. This modification will allow the regeneration wastes to be discharged into tne station sump at less than 120 gpm C

s106190 M An Equal Opoostunity Employer

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-2 JUNE 1 6 1981 Mr. Jamaa K. Patrick, Jr.

which will allow more efficient natural reutralization. Implementation of this modification is scheduled to begin in November 1981.

Sincerely, Mohamed T. El-Ashry, Ph.D.

Assistant Manager of Natural Resources (Environment) cc: Tennessee Department of Public Health Division of Water Quality Control 621 Cordell Hull Building Nashville, Tennessee 37219 Mr. Harold E. Denton, Director Office _of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission 7920 Norfold Avenue ,

Washington, DC 20555 Mr. James P. O'Reilly, Director .

Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Region II - Suite 3300, 101 Marietta Street Atlanta, Georgia 30303 6

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