ML18025B989

NPDES Noncompliance Notification:On 830619,samples from Emergency Equipment Cooling Water Sys Contained Excessive Total Residual Chlorine Concentrations.Caused by Misaligned Valve in Chlorination Injection Sys

ML18025B989
Person / Time
Site:	Browns Ferry
Issue date:	07/26/1983
From:	Elashry M TENNESSEE VALLEY AUTHORITY
To:
References
NUDOCS 8307290230
Download: ML18025B989 (6)

Text

TENNESSEE VALLEY AUTHORITY KNOXVILLE.

TENNESSEE 37902 TVA Mailroom JUL g6 1983~&prmcorr Mr.John Marlar, Chief Faci 1 i ti es Per f ormance Branch Hater Management Division U.S.Environmental Protection Agency Region IV 345 Courtland Street, NE.Atlanta, Georgia 30365

Dear Mr.Marlar:

NOTIFICATION OF NONCOMPLIANCE WITH EFFLUENT LIMITATIONS

-NPDES PERMIT NO.AL0022080-BROWNS FERRY NUCLEAR PLANT Descri tion of the dischar e--Discharge No.001-Multiple mode condenser cooling water CCW.The samples listed below from th'etkmgrr'qency equipment cooling water (EECW)system contained total residual chlori~ne'(TRC) concentrations exceeding the permit limitation of 0.8 mg/L'.Date Time CDT)Unit No.TRC m L June 19 June 19 June 19 4:00 a.m.5:30 a.m.10:00 a.m.12.6 7.?2 2.72 Cause and eriod of the noncom liance--A misalignment of a valve in the c lorination 1njectson system resu ted in over chlorination of the EECW system.The EECW system discharged to the cold water channel and was circulated through the CCW system which had a flow rate of 1,901 MGD during the period of noncompliance.

Based on the dissipation rate and the CCW flow rate, there was no detectable TRC discharged through the diffusers.

Therefore, there was no significant environmental impact on the Tennessee River.At ll:20 a.m.on June 18 the unit 1 EECW system contained less than 0.05 mg/L of TRC.A sample collected from the unit 1 EECH system on June 19 at ll;.40 a.m.contained less than 0.05 mg/L of TRC.Therefore, the total period of noncompliance was approximately 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.8307290230 830726 PDR ADOCK 05000259'DR 1983-TVA 50ŽANNIVERSARY An Eqnal Opportunity Employer~~gg9 I f lg~~~~~t 4~~

Mr.John Marlar JUL 26 1983 Ste s taken to reduce, eliminate, and revent recurrence of the noncom 1 in~disc ar e--he samp>ng frequency of t e EECW system w>ll be>ncreased.

Communications will be improved to ensure that proper valve alignment is maintained during chlorination of the system.Enclosed is a brief description of a fishkill that occurred as a result of the chlorine discharge.

As noted in the report, the kill was confined to the plant intake area.Sincerely, Oziginal Sigzzed>Y M.Paul Schmiezbach Mohamed T.El-Ashry, Ph.D.Director of Environmental Qual i ty Encl osure cc: Mr.Joe B.Broadwater, Director Alabama Department of Environmental Management State Capitol Montgomery, Alabama 36130 ctor Divi ion of Licensin U.S.Nuclear Regulatory Commission Washington, D.C.20555 I h" l.l'4"v$

F ISHKILL REPORT A fishkill did occur as a result of the chlorine discharge.

The kill was confined to the intake forebay area and was first detected at approximately 1Q a.m.on June 19.Approximately 1000 fish were removed from the intake area.Other fish in distress were also observed in the area.Fish species removed from the area included largemouth bass, bluegill, redear sunfish, longear sunfish, white crappie, white bass, sauger, freshwater drum, blue catfish, channel catfish, flathead catfish, gizzard shad, carp, spotted sucker, golden redhorse, and paddlefish.

At the time of the investigation the water temperature was 76'F and the dissolved oxygen was 6.9 ppm.No fish were observed upstream or downstream of the plant intake.

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