ML20151V366

Confirms 880804 Telcon Between Util & Tennessee Div of Water Pollution Control Re Chickamauga Reservoir Temps.Telcon Informs That River Temps Upstream & Downstream Periodically Exceeded 86.9 Degrees F on 880801,02 & 03

ML20151V366
Person / Time
Site:	Sequoyah
Issue date:	08/16/1988
From:	Schmierbach M TENNESSEE VALLEY AUTHORITY
To:	Sinclair R TENNESSEE, STATE OF
References
NUDOCS 8808220248
Download: ML20151V366 (2)

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TENNE 22EE VALLEY AUTHORITY KNOXVILLE. TENNESSEE 3 /9o2 AUS 161988 Mr. Ralph M. Sinclair Manager, Permits Section Division of Water, Pollution Control Tennessee Department of Health and Environment TERRA Building 150 Ninth Avenue, North Nashville, Tennessee 37219-5404

Dear Mr. Sinclair:

SEQUOYAH NUCLEAR PLANT (SQN) - NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) PERMIT NO. TN0026450 - CONFIRMATION OF AUGUST 4 TELECONFERENCE REGARDING CHICKAMAUGA RESERVOIR TEMPERATURES This confirms the August 4 telecon h eence between TVA staff and Phil Simmons and Phli Stewart of the Tennessee Division of Water Pollution Control (TDWPC). The purpose of the teleconference was to inform TDWPC that tha river temperatures upstream and downstream of SQN had periodically exceeded 86.9 degrees Fahrenheit (F) at the 5-foot depth on August 1, 2, and 3, and would likely continue to exceed that value until reservoir conditions and/or weather conditions change. The thermal plume from SQN was not af fecting the temperatures at the 5-foot depth, because the reservoir is strongly stratified. The heat load from the plant was reduced late on August 2 by operating one of the cooling towers in helper mode. In addition, SQN cannot operate in closed mode during the summer without potential for tripping the unit.

Mr. Stewart requested that wo submit a report documenting the conditions in the reservoir and actions taken by SQN to mitigate the impacts of its discharge during this time. This report should be submitted to your office with a copy to Mr. Stewart by September 6. Ite report will include data on dissolved oxygen levels in the reservoir as requested by Mr. Stewart.

At this writing, conditions have not changed. Reservoir temperatures continue to increase and reach about 87.2 degrees F for 1 to 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> most days between 4 p.m. and midnight. One cooling tower continues to be operated even though the thermal plume is not affecting (ne tempera-tures at the 5-foot depth.

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G808220248 800816 I ()

PDR ADOCK 05000 27 J PC J An Equal Opportunity Employer i

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Mr. Ralph M. Sinclair g

If you or your staff have any questions recarding these comments, please have them call Abe Loudermilk at (615) 632-6714 in Knoxville, Tennessee.

Sine ely,

[tt ld M. Paul EcbieNach Manager Environmental Quality ec: Mr. Bruce R. Barrett, Director Water Management Division U.S. Environmental Protection Agency, Region IV 345 Courtland Street, NE.

Atlanta, Georgia 30365 Me. S. C. Black, Assistant Director for Projects TVA Projects Division U.S. Nuclear Regulatory Commission '

One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 Mr. F. R. McCoy, Assistant Director for Inspection Programs '

TVA Projects Division U.S. Nuclear Regulatory Comission Region II 101 Marietta Street, NW., Suite 2900 )

Atlanta, Coorgia 30323 i

Mr. Philip L. Stewart, Manager j Chattanooga Field Office j Division of Water Pollution Control -

l l 2501 Milne Street '

Chattanooga, Tennessee 37406 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555

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