ML110340058

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2010 Biocide/Corrosion Treatment Plan (B/Ctp) Annual Report - NPDES Permit No. TN0026450
ML110340058
Person / Time
Site: Sequoyah  Tennessee Valley Authority icon.png
Issue date: 01/31/2011
From: Skaggs M
Tennessee Valley Authority
To: Cromer P
Office of Nuclear Reactor Regulation, State of TN, Dept of Environment & Conservation, Div of Water Pollution Control
References
Download: ML110340058 (7)
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Text

Tennessee Valley Authority, Post Office Box 2000, Soddy Daisy, Tennessee 37384-2000 January 31, 2011 State of Tennessee Department of Environment and Conservation Division of Water Pollution Control Enforcement & Compliance Section 6 th Floor, L & C Annex 401 Church Street Nashville, Tennessee 37243-1534

Dear Mr. Patrick Cromer:

SEQUOYAH NUCLEAR PLANT (SQN) - 2010 BIOCIDE/CORROSION TREATMENT PLAN (B/CTP) ANNUAL REPORT - NPDES PERMIT NO. TN0026450 In accordance with Part IV.B. of NPDES Permit No. TN0026450, SQN developed a B/CTP that was approved by the Division of Water Pollution Control on April 27, 2005 for the specific and limited application of oxidizing biocides, non-oxidizing biocides, dispersants, surfactants, corrosion inhibiting chemicals, and detoxification chemicals at SQN. The use of these chemicals is necessary to ensure the safe operation of the facility.

The B/CTP approval requires that "annually, a report shall be submitted to the Division presenting the biomonitoring data for tests conducted during treatments, a summary of all analytical results (daily maximum, daily average, number of samples), the approximate duration in hours of each chemical used, quantity in pounds of each chemical used, and any minor changes that have occurred to the plan. The report shall be submitted to the Enforcement and Compliance Section in Nashville and to the Chattanooga Environmental Field Office by February 15 of the year following the reporting year. Also, in order to compare reliability of the mass balance calculations with the methylene chloride extraction method, SQN shall compare both methods used for analyses of the effluent and report to the Division."

SQN compared the results of both methods (mass balance calculations and the methylene chloride extraction method) used for analyses of the effluent. However, SQN did not detoxify the effluent during any non-oxidizing biocide treatments in 2010. A total of 25 samples from the Diffuser effluent (Outfall 101) have been analyzed by each method, see summary on following page:

Utz,

Spectrus Analytical Results Analytical Results CT1 300 Mass Balance Calculations (mg/L)

Methylene Chloride Extraction (mg/L)

  1. of
  1. of Month Maximum Average Limit Samples Maximum Average Limit Samples January 0

0 February 0

0 March 0

0 April 0

0 May 0.039 0.039 0.05 11

<0.05

<0.05 0.05-11 June 0.040 0.040 0.05 2

<0.05

<0.05 0.05 2

July 0.039 0.039 0.05 4

<0.05

<.0.05 0.05, 4

August 0.039 0.039 0.05 4

<0.05

<0.05 0.05 4

September 0.040 0.038 0.05 4

<0.05

<0.05 0.05 4

October 0

0 November 0

0 December 0

0 Jan-Dec 25 25 For a second year, TVA SQN requests the removal of the requirement stated in the April 27, 2005 B/CTP approval letter signed by Edward M. Polk, Jr., P.E., "In order to compare reliability of the mass-balance calculations with the methylene chloride extraction method, SQN shall compare both methods used for the analyses of the effluent and report to the Division." SQN has had an outside qualified laboratory analyze 201 samples by the methylene chloride extraction method since May 2005 and all analytical results have been <0.05mg/L. SQN would like to request the discontinuance of the methylene chloride extraction method. See the summary below:

H-150M/

Analytical Results Analytical Results Spectrus Mass Balance Calculations (mg/L)

Methylene Chloride Extraction CT1300 (mg/L)

  1. of
  1. of Year Maximum Limit Samples Maximum Limit Samples 2005 0.040 0.05 35

<0.020 0.05 35 2006 0.037 0.05 36

<0.020 0.05 36 2007 0.047 0.05 31

<0.020 0.05 31 2008 0.041 0.05 37

<0.020 0.05 37 2009 0.047 0.05 39

<0.050 0.05 37 2010 0.040 0.05 25

<0.050 0.05 25 2005-2010 203 201

If you have any questions or need additional information, please contact Brad Love at (423) 843-6714 or Stephanie Howard at (423) 843-6700 of Sequoyah's Environmental staff.

Sincerely,

<142 Michael D. Skaggs Site Vice President Sequoyah Nuclear Plant Enclosure cc (Enclosure):

Mr. Vojin Janjic State of Tennessee Dept. of Environment and Conservation Division of Water Pollution Control 6t' Floor, L & C Annex 401 Church Street Nashville, Tennessee 37243-1534 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Chattanooga Environmental Field Office Division of Water Pollution Control State Office Building, Suite 550 540 McCallie Avenue Chattanooga, Tennessee 37402-2013

TN0026450 SQN 2010 Biocide/Corrosion Treatment Plan Annual Report Biodetergent 73551 Quantity in Pounds (lbs/day)

Duration in Hours (hrs/day)*

Maximum Limit Analytical Results mass balance calculations (mg/L)

  1. of samples Days in Service Month Maximum Averaqe Limit Maximum Average Limit I

+

I January February March April May June July August September October November December Jan. - Dec.

14 14 9

14 14 14 14 9

9 6

10 12 13 9

50 50 50 50 50 50 50 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.017 0.018 0.020 0.018 0.017 0.017 0.017 0.017 0.017 0.018 0.018 2.0 2.0 2.0 2.0 2.0 2.0 2.0 611 11 6

4 11 7

0.017 0.017 0.017 6

11 11 6

0 4

11 7

0 0

0 0

56 56

  • Treatment durations shall not exceed 30 minutes at 2-3 times per week into ERCW Train A, ERCW Train B, and RCW systems.

Per the B/CTP approval: "Frequency of use would be appoximately 208 days per year and duration of use would be about 0.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> per day with a maximum daily usage of 50 lbs/day for all three-injection points."

TN0026450 SQN 2010 Biocide/Corrosion Treatment Plan Annual Report Flogard MS6236 Quantity in Pounds (lbs/day)

Maximum Average Limit Duration in Hours (hrs/day)

Maximum Analytical Results mass balance calculations (mg/L)

  1. of Maximum Average Limit samples Days in Service Month I

I I

January February March April May June July August September October November December Jan. - Dec.

418 835 835 418 344 351 482 610 333 205 2275 2275 2275 2275 2275 24.00 24.00 24.00 24.00 19.75 0.032 0.062 0.061 0.038 0.059 0.031 0.041 0.049 0.031 0.050 0.2 0.2 0.2 0.2 0.2 28 28 27 27 4

0 0

0 0

0 28 28 27 27 4

0 0

114 114 Per the B/CTP approval: "Flogard MS6236 is injected into the ERCW Train A & B system only during warm weather months."

TN0026450 SQN 2010 Biocide/Corrosion Treatment Plan Annual Report Towerbrom 960 Duration in Quantity in Pounds Hours Analytical Results (lbs/day)

(hrs/day) mass balance calculation (mg/L)

  1. of Days in Month Maximum Average Limit Maximum Maximum Average Limit samples Service (based on days in service)

January 200 91 1425 5.67 0.023 0.014 0.10 12 12 February 190 130 1425 5.67 0.037 0.022 0.10 11 11 March 140 78 1425 4.75 0.027 0.018 0.10 12 12 April 380 265 1425 24.00 0.032 0.019 0.10 26 26 May 320 161 1425 24.00 0.027 0.012 0.10 25 24 June 290 212 1425 7.75 0.032 0.022 0.10 23 23 July 490 277 1425 16.50 0.038 0.019 0.10 23 22 August 280 188 1425 6.17 0.024 0.014 0.10 20 19 September 430 253 1425 16.50 0.045 0.017 0.10 37 25 October 210 149 1425 4.58 0.028 0.018 0.10 27 16 November 550 290 1425 24.00 0.028 0.014 0.10 31 30 December 240 151 1425 13.50 0.036 0.015 0.10 14 14 Jan. - Dec.

261 234 Per the B/CTP approval: "Whole Effluent toxicity testing (biomonitoring) of Outfall 101 and Outall 110 shall be undertaken once per year when oxidizing biocides are being used."

Outfall 101: Toxicity was sampled October 31 - November 5, 2010.

Test Results: Pimephales promelas: IC25 >100%

Ceriodaphnia dubia: IC25 > 100%

Outfall 110: There has been no discharge from Outfall 110 January - December 2010.

TN0026450 SQN 2010 Biocide/Corrosion Treatment Plan Annual Report Spectrus CT1300 Quantity in Pounds (lbs/day)

Duration in Hours (hrs/day)

Analytical Results mass balance calculations (mg/L)

Analytical Results methylene chloride extraction (mg/L)

  1. of Samples
  1. of Samples Days in Service Month Maximum Averaae Limit IMaximum Maximum Averaae Limit vlaximurr Averaae Limit Month Maxmu Lm I M x,

January February March April May June July August September October November December Jan. - Dec.

531 316 328 332 343 413 311 301 249 292 855 855 855 855 855 17.75 14.25 15.83 15.00 15.50 0.039 0.040 0.039 0.039 0:040 0.039 0.040 0.039 0.039 0.038 0.05 0.05 0.05 0.05 0.05 11 2

4 4

4

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05

<0.05 0.05 0.05 0.05 0.05 0.05 11 2

4 4

4 U

0 0

0 11 2

4 4

4 0

0 0

25 25 25 Per the B/CTP approval: "Whole Effluent toxicity testing (biomonitoring) of Outfall 101 and Outall 110 shall be undertaken once per year when non-oxidizing biocides are being used."

Outfall 101: Toxicity was sampled May 9-14, 2010 during the Spectrus CT1300 treatment.

Test Results: Pimephales promelas: IC25 >100%

Ceriodaphnia dubia: IC25 > 100%

Outfall 110: There has been no discharge from Outfall 110 January - December 2010.

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