ML21347A902

Discharge Monitoring Report (DMR) Quality Assurance Study 41 Follow-up Report 2021

ML21347A902
Person / Time
Site:	Sequoyah
Issue date:	12/13/2021
From:	Markum T Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML21347A902 (4)

Text

TENNESSEE 1\14 VALLEY AUTHORITY Tennessee Valley Authority, Sequoyah Nuclear Plant, P.O. Box 2000, Soddy Daisy, TN 37384 December 13, 2021 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001

Subject:

Sequoyah Nuclear Plant, Discharge Monitoring Report (DMR) Quality Assurance Study 41 Follow-up Report 2021 Attached is the Discharge Monitoring Report Quality Assurance Study 41 Follow-up Report 2021 for Sequoyah Nuclear Plant.

Respectfully, Travis R. Markum Environmental Scientist

Markum, Travis R From: Markum, Travis R Sent: Monday, December 13, 2021 1:24 PM To: 'Barbara.loudermilk@tn.gov'

Subject:

TN0026450 - DMR-QA Study 41 Follow-up Test Report Attachments: SQN TN0026540 DMR-QA 41 Followup Test Report to TDEC 12.13.21.pdf Ms. Loudermilk, Please find attached the providergraded test result and revised checklist for the 2021 DMRQA Study 41 Laboratory Performance Evaluation for NPDES Permit TN0026450.

Corrective Action The site ordered a followup test kit to reanalyze for TRC as required by the DMRQA Study. While the site was unable to identify the exact cause to the not acceptable result in the initial study, we believe it was due to potential errors made when preparing the known TRC sample for analysis. For the initial study, a graduated cylinder was used to dilute the known sample to 1000 mL; however, a 1L volumetric flask was used to more precisely dilute the known sample in the followup process. There may have been other contributing factors as well, although we believe this to be the primary difference between the initial and followup test result.

Please let me know if you have any questions or need additional information.

Travis R. Markum Env. Scientist (Compliance)

Environmental Operations TVA Sequoyah Nuclear Plant PO Box 2000, OPS 5N Soddy Daisy, TN 37384

423-843-6714

trmarkum@tva.gov NOTICE: This electronic message transmission contains information that may be TVA SENSITIVE, TVA RESTRICTED, or TVA CONFIDENTIAL. Any misuse or unauthorized disclosure can result in both civil and criminal penalties. If you are not the intended recipient, be aware that any disclosure, copying, distribution, or use of the content of this information is prohibited. If you have received this communication in error, please notify me immediately by email and delete the original message.

1

Permittee Name TVA Sequoyah Nuclear Plant State TN NPDES Permit No.0026450 EPA Lab Code TN00999 Chemis try/Mic robiolo gy Analyte Checklist DMR-QA St U dIY 41 Method Number Laboratory 's Graded Result Analyte Test Test Required Analyte determined by Used (optional) Not Acceptable state-certified lab*

Acceptable (Corrective Action Required)

M lcrobloJogy E. coli, MF or MPN D D D D Fecal Coliform, MF or M PN D D D D Total Coliform, MF or MPN I I I I I I I I TrottMdoJs Aluminum Antimony D D D D D D D D Arsenic D D D D Barium D D D D Beryllium Cadmium D D D D Chromium, total D D D D Chromium. hexavalent D D D D D D D D Cobalt D D D D Copper Iron D D D D Lead D D D D Manganese D D D D Mercury D D D D Mercury (Low Level)

D D D D Molybdenum D D D D Nickel D D D D Selenium D D D D Silver D D D D Thallium D D D D Vanadium D D D D D D D D Zinc O.monds D D D D 5-day BOD D D D D 5-day Carbonaceous BOD COD D D D D TOC D D D D I I I I I I MIMrols I I Alkalinity, total (CaC01)

D D D D Chloride Fluoride D D D D D D D D Hardness, total (CaC01)

D D D D Specific conductance (25°0 D D D D Sulfate Total Dissolved Solids (180°0 D D D D I I Nutrients I I AmmonlaasN Nitrate as N Nit rite as N D Orthophosphate as P D Total Kjeldahl-Nitro gen as N Total Phosphorus as P I I I I I I I I M isc. Ano/ytti Non- Filterable Residue (TSS)

Oil and Grease D

pH 00 Total Cyanide USGS 1-1586-85 00 Total Phenolics (4-MP)

Total Residual Chlorine - -

00 HACH 81 67

~ ~';:-. ,A ,z17", i1,,

Total Residual Chlorine (Low Level)

Settleable Solids Turbidity Name Tony McMutuary Signature )cry: 1)1"~ Date /!ltc-/JI

• See Footnote on page 2.

Page 12 Complete a separate checklist for EACH lab.

Ver. 1 Page 7 of 7 120321O Final Evaluation Report

~ERA A Waters Company Travis Markum EPA ID: TN00999 SQN Environmental Scientist ERA Customer Number: T203302 TVA - Sequoyah Nuclear Plant P.O. Box 2000 Mailstop: OPS-5N-SQN Soddy-Daisy, TN 37384 423-843-6714 TNI Study Reported Assigned Acceptance Performance Analysis Study Analyte Analyte Units Method Description Z Score Standard Analyst Name Value Value Limits Evaluation Date Mean Code Deviation WP Total Residual Chlorine (cat# 501, lot# 120321O) Study Dates: 12/03/2021 - 12/07/2021 1945 Free Residual Chlorine mg/L 2.23 1.64 - 2.61 Not Reported 2.18 0.161 1940 Total Residual Chlorine mg/L 1.81 2.34 1.72 - 2.73 Acceptable HACH 8167 5th ED 2008 12/7/2021 -2.92 2.25 0.150 All analytes except for 1,1-Biphenyl, 1,2-Diphenylhydrazine, 1,3-Dinitrobenzene, 2,3-Dichloroaniline, Acetophenone, Atrazine, Azobenzene, Benzaldehyde, Caprolactam, n-Decane and n-Octadecane in the Base/Neutrals, catalog # 833, are included in ERAs A2LA accreditation. Lab Code 1539.01.

16341 Table Mountain Pkwy

• Golden, CO 80403

• 800.372.0122

• 303.431.8454

• fax 303.421.0159

• www.eraqc.com Project # : 120321O