ML20037B691
| ML20037B691 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 10/29/1980 |
| From: | Elashry M TENNESSEE VALLEY AUTHORITY |
| To: | |
| References | |
| NUDOCS 8011040193 | |
| Download: ML20037B691 (2) | |
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TENNESSEE VALLEY AUTHORITY Nonnte. Tshstsass 37820
$1 215 Natural Resources Building
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,I Mr. James R. Patrick, Jr., Chief Water. Enforcement Branch Enviretmental Protection Agency, Region IV 345 C<.
tland Street, NE i
1 Atlanta, Georgia 30303
Dear Mr. Patrick:
NOTIFICATION OF NONCOMPLIANCE WITH EFFLUENT LIMITATIONS - NPDES PERMIT
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NO. TN0026450 - SEQUOYAH NUCLEAR PLMTf Description of the discharge-Discharge No. 012 - Cooling Tower Blowdown (CTB). A sample collected at 10:30 a.m.,
October 22, 1980, contained n'
41.36 mg/l of boron, exceeding the temporary authorized limit of 14 mg/1, which was granted by Sanford W. Ilarvey, Jr., in a letter to Mohamed T. El-Ashry dated July 31, 1980.
Cause and period of the noncompliance-The noncompliance resulted from a decreano in the CTB flow from 2S.000 gpa at 9:00 a.u.
to 7,500 gpm at 10:00 a.n. without a corresponding decrease in the flow froci the boron waste tank. On September 30, 1980, the CTB flow monitor malfunctioned and an automatic chutoff valve on the waste discharge was wirad open while the flow monitor was being repaired. On October 6, 1980, the flow monitor was retuned to service, but the automatic s.hutoff valve was inadvertently 3 eft vired open. When the CTB flow decreased on October 22, 1930, the valve.<as inoperative acd the flow f rom the boron waste.ank uns not stopped until 11:10 a.m.
~A sampic collected at 2:00 p.m.,
October 22, 1980, contained 0.36 mg/l of boron, confirming that the period of noncompliance was over. Therefore, the period of noncompliance was only about two hours.
Steps taken to reduce, eliminate, and prevent recurrence of the noncomplying discharge---At 11:10 a.m., October 22, 1980, the boron waste tank discharge was stoppal and by 1:30 p.m., October 22. 1980, the CTB flow had been increased. The maximum borou concentration la the diffuact discharge (No. 024) during this period was 0.41 mg/1, which la much lens.
than the temporary authorized linit or 1.1 mg/1. Thus, we believe that this event had no significant environnental impact on tha.Tennesseo River. The autountic ahutoff. valve on the waste discharge line has been returned to service and thi.n will' prcvent any further noncompliances of f thin nature.
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.. Sincerely, Mohamed T. El-Ashry, Ph.D.
1 Director of Environmental Quality 5
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Mr. James R. Patrick, Jr.
.i NOTIFICATION OF NONCOMPLIANCE WITil EFFLUENT LIMITATIONS - NPDES PERMIT
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NO. TN0026450 - SEQUOYAll NUC1. EAR PLANT cc: Tennessee Department of Public Health t
Division of Water Ouality Control 621 Cordell Hull Building Nashville, Tennessee 37219
_%. lI3X9Ad.L..D.enton.. Direct;or '
Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission 7920 Norfolk Avenue Washington, DC 20555
'i Mr. James P. O' Reilly, Director
.q Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission
,4 Region II - Suite 3300, 101 Marietta Street
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Atlanta, Georgia 30303 i
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