ML20069G953

Forwards Approval Ltr from DHEC Authorizing Use of Sodium Bromide in Cooling Towers.Internal DHEC Memo from V Beaty Giving Rept on Review of Toxicity Data Util Supplied to Sc on Sodium Bromide Also Encl

ML20069G953
Person / Time
Site:	Catawba
Issue date:	06/02/1994
From:	Estridge J DUKE POWER CO.
To:	Davis W, Harris J, Jackson A SOUTH CAROLINA, STATE OF
References
NUDOCS 9406100233
Download: ML20069G953 (4)

Text

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june 2,1994 J.T. Harris W.J. Davis A.P. Jackson S.D. Davenport J.S. Velte i

Subject:

Catawba Nuclear Station -NPDES Permit No. SC0004278 Approval for Sodium Bromide Usage in RC Cooling Towers File: CN-702.13

. Attached please find the approval letter from DHEC authorizing the use of Sodium Bromide in the cooling towers. This letter is identical to the letter that Tim Eleazer faxed up for our review, with the exception that the reference to RL in condition #2 ,

was corrected. Also, attached please find and internal DHEC memo from Vernon Beaty giving his report on his review of the toxicity data we supplied the State on Sodium Bromide.

Please note the special conditions contained in the memo. Environmental Management at the site should make the notification required in condition #4. Should you have any questions feel free to give me a call at (704) 875-5965.

Sincerely, y ^

Jo n Estridge, Engineer N -

Environmental Division, Water Protection jte/323 Attachments cc: M.A. Lascara NRC Document Distribution List 0

9406100233 DR 940602 //

ADOCK 05000413 PDR

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South Carolina commissioner: Dougian E. Bryant DHEC l

Board: Richard E. Jatsbour, DDS, Chairman Wilham E. Applegate, til, Robert J Stripling, Jr., Vice Chairman John H Burriss l Dep,artment of Healtn and Environmental Control p 2600 Bull Street, Columbia, SC 29201 Promoting Health, Profoctsng the Environment May 25, 1994 DS@QR NAY 3 U 1994, D Fu r&7eli/3 Mr. John S. Carter O TOHR DME Technical System Manager Duke Power Company Environmental Division, Water Protection O@

13339 Hagers Ferry Road Huntersville, N.C. 28078-7929 -

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IA ROUTEmT7Z ___

Re: Sodium Bromide Trial--'"  %

Cat awba Nucte a r Stati on/ Duke Powe r Co .

York County

Dear Mr. Carter:

Our Office has received your April 20, 1994 letter requesting approval to conduct a maintenance chemical trial using sodium bromide for control of biological growth in the two (2) recirculating cooling towers systems at the Catawba Nuclear Station in York County. We understand this trial is to evaluate the effectiveness of the sodium bromide in comparison to the sodium hypochlorite which is presently used in the cooling towers. Based on a review of the information provided, our Office approves your request with the following conditions:

1) This trial is approved for a period of ninety (90) days.

2) A minimum dilution of one (1) part RC cooling tower blowdown water to two (2) parts once through RL cooling water (1:2) must be maintained. .

3) During the trial, internal Outfall 005 shall be limited to a monthly average of 0.2 mg/l and a instantaneous maximum of 0.5 mg/l for Free Available Oxidants.

4) In regards to the specific start date of the trial, please contact Mr. Al Williams in our District Office at (803)285-7461.

5) Before sodium bromide can be used permanently as a maintenance  !

chemical in the cooling towers, the Catawba Nuclear Station NPDES Permit No. SC0004278 will have to be modified to add Free Available Oxidant (FAO) to the permit.  ;

ei recyttedpaper i

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Duke Poder Co./ April 20, 1994 letter Page 2 If you should have any questions, please call me at- (803)734-5247.

Sincerely, w

ei - 777. E&y .

Timothy M. Eleazer >

Environmental Engineer Associate .

Industrial and Agricultural 1 Wastewater Division TME/ebs cc: Al Wiliiams, Catawba EQC Vernon Beaty, WQ Monitoring Section i

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e Srxith Carolina DHE n.m. .n v ,w.m wm i nm,< , n m t, .n a Bureau of Water Pollution Control MEMORANDUM TO: Tim Eleazer Federal / Energy /Pretreatment Section FROM:

Vernon Beaty, Aquatic Toxicologist g#W g#

Water Quality Monitoring Section

SUBJECT:

DUKE POWER / CATAWBA NUCLEAR STA NPDES No. SC0004278 York Co.

DATE: May 19,1994 I have reviewed the toxicity data on the sodium hypochlorite/ sodium bromide solution to be us( J in the RC cooling towers. No EC2owas generated because there was no toxic response to the solution at cooling tower wate concentrations less than or equal to 33.4%, or 1:2 dilution. Since the dilution will be 1:8, use of this solution is not expected to cause any toxicity to the receiving stream. I suggest that the minimum dilution be limited to 1 part cooling waste to 2 parts intake water if there is any possibility that the dilution will fall below 1:8. If you have any questions, call me at 734 5396.

l RECEIVE][';. l MAY 23 1994 6.C. Dept. of Health & trwitonmentet

• Cony-Industrihj Agricultural Waste' water Dw .fon .

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