ML20069H644

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

ML20069H644
Person / Time
Site:	Catawba
Issue date:	06/02/1994
From:	Estridge J DUKE POWER CO.
To:	Davis W, Harris J, Jackson A NRC
References
NUDOCS 9406130255
Download: ML20069H644 (4)

Text

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

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. ;l Sincerely, Y H '

John Estridge, Engineer N Environmental Division, Water Protection jte/323 Attachments r

cc: M.A. Lascara NRC Document Distribution List 9406130255 940609 PDR '

S ADOCK 05000413 7 PDR l (

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, p Va d a Commissioner: Dougtas E.Bryant

,D H E C l

Board: Richard E. Jabbour DDS. Chairman Wilham E. Applegate. til, Robert J. Striphng. Jr., Wce Chairman John H. Burriss Depanment of Health and Envuonmental Control gp 2 goo Bull street, Columbia. SC 29201 Promoting Health, Protecting the Environment May 25, 1994 EDS03Q!l NAY 31!1994.

D ELE rN'7al,/$

Mr. John S. Carter OTM y' --

Technical System Manager Duke Power Company Environmental Division, Water Protection O C0cY 13339 Hagers Ferry Road Huntersville, N.C. 28078-7929

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Re: Sodium Bromide TriaP* <

Catawba Nuctear Stati on/ Duke Power 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 tc 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 I 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 I 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.

O recyckdpaper

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

Sincerely, 7 4 m.zsy Timothy M. Eleazer Environmental Engineer Associate Industrial and Agricultural Wastewater Division TME/ebs cc: Al Williams, Catawba EQC Vernon Beaty, WQ Monitoring Section t

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South Carolina DHEC o.na.i.. .a ai no,,nn a,,o uw o...r.,.aa, u.m.

Bureau of Water Pollution Control MEMORANDUM TO: Tim Eleazer Federal / Energy /Pretreatment Section FROM:

Vernon Beaty, Aquatic Toxicologist y#W Water. Quality Monitoring Section -

SUBJECT:

DUKE POWER / CATAWBA NUCLEAR STA NPDES No. SC0004278

. York Co.

DATE: May 19,1994 -

l I have reviewed the toxicity data on the sodium hypochlorite/ sodium bromide solution to be used in the RC cooling towers. No EC 2awas generated because there was no toxic response to the solution at con!ing tower wate concentrations less than or eq.zal to 33.4%, or 1:2 dilution. Since the dilution will be 1:S, 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.

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RECEIVE {';.

MAY 23 1994 -

S.C. Dept. of Heattn & Erwironinensa!

• Coy-Industrid-gA 'culturW Wastewater Om.lon .

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