Text

2021 Annual Radioactive Effluent Release Report
	ML22122A234
Person / Time
Site:	Browns Ferry
Issue date:	05/02/2022
From:	Rasmussen M; Tennessee Valley Authority
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	Download: ML22122A234 (167)
	v • d • e

Post Office Box 2000, Decatur, Alabama 35609-2000 May 2, 2022 10 CFR 50.4 10 CFR 50.36 §a 10 CFR 50 Appendix I ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Browns Ferry Nuclear Plant, Units 1, 2, and 3 Renewed Facility Operating License Nos. DPR-33, DPR-52, and DPR-68 NRC Docket Nos. 50-259, 50-260, and 50-296

Subject:

2021 Annual Radioactive Effluent Release Report In accordance with the Browns Ferry Nuclear Plant (BFN), Units 1, 2, and 3, Technical Specification Section 5.6.3, the Tennessee Valley Authority is submitting the BFN Annual Radioactive Effluent Release Report for the period January through December 2021. This document is in conformance with Title 10 of the Code of Federal Regulations (10 CFR) 50.36a and 10 CFR 50, Appendix I, Section IV.B.1.

There are no new regulatory commitments contained in this letter. Should you have any questions concerning this submittal, please contact Chris Vaughn at (256) 729-2636.

Respectfully, M. M. Rasmussen Site Vice President

Enclosure:

2021 Annual Radioactive Effluent Release Report cc (w/ Enclosures):

NRC Regional Administrator - Region II NRC Senior Resident Inspector - Browns Ferry Nuclear Plant NRC Project Manager - Browns Ferry Nuclear Plant

ENCLOSURE Browns Ferry Nuclear Plant Units 1, 2, and 3 2021 Annual Radioactive Effluent Release Report See Enclosed

Browns Ferry Nuclear Plant Tennessee Valley Authority Annual Radioactive Effluent Release Report (ARERR) 2021

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 2 of 165 I.

Introduction.......................................................................................................................................... 4 II.

Supplemental Information.................................................................................................................... 4 Regulatory Limits.............................................................................................................................. 4 Limitation on Dose Rate.................................................................................................................... 4 Average Energy................................................................................................................................. 5 Measurements & Approximations of Total Radioactivity................................................................. 5 Batch Releases.................................................................................................................................. 7 Abnormal Releases............................................................................................................................ 8 Non-routine Planned Discharges...................................................................................................... 9 Radioactive Waste System Treatment Changes............................................................................... 9 Land Use Census Changes................................................................................................................. 9 Effluent Monitoring Instrument Inoperability > 30 Days.................................................................. 9 Effluent Monitoring Equipment Sample Deviation........................................................................... 9 Offsite Dose Calculation Manual Changes........................................................................................ 9 Groundwater Monitoring and Program (NEI 07-07)................................................................... 10 Errata/Corrections to Previous ARERRs.......................................................................................... 12 III.

Gaseous Effluents........................................................................................................................... 13 Table 1-A Gaseous Effluents - Summation of all Releases...................................................................... 13 Table 1-B Gaseous Effluents - Ground Level Releases (Batch)............................................................... 14 Table 1-B Gaseous Effluents - Ground Level Releases (Continuous)..................................................... 15 Table 1-C Gaseous Effluents - Elevated Releases (Batch)...................................................................... 16 Table 1-C Gaseous Effluents - Elevated Releases (Continuous)............................................................. 17 Table 1-D Gaseous Effluents - Mixed Mode Releases (Batch)............................................................... 18 Table 1-D Gaseous Effluents - Mixed Mode Releases (Continuous)...................................................... 19 IV.

Liquid Effluents............................................................................................................................... 20 Table 2-A Liquid Effluents - Summation of all Releases.......................................................................... 20 Table 2-B Liquid Effluents - Batch Mode................................................................................................ 21 Table 2-B Liquid Effluents - Continuous Mode....................................................................................... 22 V.

Solid Waste Storage and Shipment..................................................................................................... 23 Solid Waste Shipped Off-site for Burial or Disposal (Not Irradiated Fuel)...................................... 23 Irradiated Fuel Shipments (Disposition)......................................................................................... 27 VI.

Radiological Impact to Man............................................................................................................ 28 Introduction.................................................................................................................................... 28

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 3 of 165 Dose Limits...................................................................................................................................... 28 Dose Calculations............................................................................................................................ 29 Doses from Airborne Effluents........................................................................................................ 29 Doses from Liquid Effluents............................................................................................................ 30 Population Doses............................................................................................................................ 31 Offsite Direct Radiation Dose.......................................................................................................... 32 Dose to a Member of the Public Inside the Site Boundary............................................................. 32 Total Dose....................................................................................................................................... 33 Tables.............................................................................................................................................. 34 Table 3-A Doses from Airborne Effluents - 1st Quarter.......................................................................... 34 Table 3-B Doses from Airborne Effluents - 2nd Quarter......................................................................... 34 Table 3-C Doses from Airborne Effluents - 3rd Quarter.......................................................................... 35 Table 3-D Doses from Airborne Effluents - 4th Quarter.......................................................................... 35 Table 4-A Doses from Liquid Effluents - 1st Quarter............................................................................... 36 Table 4-B Doses from Liquid Effluents - 2nd Quarter.............................................................................. 36 Table 4-C Doses from Liquid Effluents - 3rd Quarter.............................................................................. 37 Table 4-D Doses from Liquid Effluents - 4th Quarter.............................................................................. 37 Table 4-E Total Dose from I-131 Water Ingestion.................................................................................. 38 Table 5 Total Dose from Fuel Cycle......................................................................................................... 39 VII.

Meteorological Data....................................................................................................................... 40 Table 6-A Ground Level Releases - 1st Quarter JFD................................................................................. 40 Table 6-B Ground Level Releases - 2nd Quarter JFD................................................................................ 48 Table 6-C Ground Level Releases - 3rd Quarter JFD................................................................................. 56 Table 6-D Ground Level Releases - 4th Quarter JFD................................................................................ 64 Table 7-A Split Level Releases - 1st Quarter JFD...................................................................................... 72 Table 7-B Split Level Releases - 2nd Quarter JFD..................................................................................... 89 Table 7-C Split Level Releases - 3rd Quarter JFD.................................................................................... 104 Table 7-D Split Level Releases - 4th Quarter JFD................................................................................... 119 Table 8-A Elevated Releases - 1st Quarter JFD...................................................................................... 134 Table 8-B Elevated Releases - 2nd Quarter JFD...................................................................................... 142 Table 8-C Elevated Releases - 3rd Quarter JFD...................................................................................... 150 Table 8-D Elevated Releases - 4th Quarter JFD...................................................................................... 158

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 4 of 165 I.

Introduction II.

Supplemental Information Regulatory Limits

1.

Gaseous Effluents Fission and Activation Gases The release of fission and activation gases is regulated by the dose limits of Title 10 of the Code of Federal Regulations (10 CFR) 50 Appendix I and Browns Ferry Nuclear Plant (BFN) Offsite Dose Calculation Manual (ODCM). The air dose to areas at and beyond the site boundary due to noble gases released in gaseous effluents per unit shall be limited during any calendar quarter to 5 millirad (mrad) for gamma radiation and 10 mrad for beta radiation; and during any calendar year to 10 mrad for gamma radiation and 20 mrad for beta radiation.

Iodines and Particulates with Half-Lives Greater than Eight Days The release of iodines and particulates in gaseous effluent is regulated by the dose limits of 10 CFR 50 Appendix I and the BFN ODCM. The dose to a member of the public from radioiodines, radioactive materials in particulate form, and radionuclides other than noble gases with half-lives greater than eight days in gaseous effluent released per unit to areas at and beyond the site boundary shall be limited to any organ during any calendar quarter to 7.5 millirem (mrem), and during any calendar year to 15 mrem.

2.

Liquid Effluents The release of radioactive liquid effluents is regulated by the dose limits of 10 CFR 50 Appendix I and the BFN ODCM. The doses or dose commitment to a member of the public from radioactive materials in liquid effluents released from each unit to unrestricted areas shall be limited during any calendar quarter to 1.5 mrem to the total body and 5 mrem to any organ and during any calendar year to 3 mrem to the total body and 10 mrem to any organ.

Limitation on Dose Rate

1.

Gaseous Effluents Fission and Activation Gases The instantaneous release rate of fission and activation gases is based on the dose rate limits of 10 CFR 20.1301 and the BFN ODCM. The dose rate at any time to areas at and beyond the site boundary due to noble gases released in gaseous effluents from the site shall be limited to 500 mrem per year to the total body and 3000 mrem per year to the skin.

The BFN ODCM Section 7.2 determines the maximum noble gas release rate.

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 5 of 165 Iodines and Particulates with Half-Lives Greater than Eight Days The instantaneous release rate of particulates and iodines is regulated by the dose rate limits of the BFN ODCM. The dose rate at any time to areas at and beyond the site boundary, due to I-131, I-133, H-3, and particulates with half-lives greater than eight days in gaseous effluent released from the site, shall be limited to 1500 mrem per year to any organ.

The BFN ODCM Section 7.3 determines the maximum particulate and iodine dose rates.

2.

Liquid Effluents The concentration of radionuclides in liquid effluents released at any time from the site to unrestricted areas shall be limited to the concentrations specified in 10 CFR 20.1001-20.2402, Appendix B, Table 2, Column 2 for radionuclides other than dissolved or entrained noble gases.

For dissolved or entrained noble gases, the concentration shall be limited to 2E-4 Ci per milliliter (ml) total activity.

Average Energy The BFN ODCM limits the dose equivalent rates due to the release of noble gases to less than or equal to 500 mrem/year to the total body and less than or equal to 3000 mrem/year to the skin. The use of dose rate is in accordance with NUREG-0133, "Preparation of Radiological Effluent Technical Specifications for Nuclear Power Plants."

Since the release rate is not used for effluent control, the average beta and gamma energies (E) for gaseous effluents discussed in Regulatory Guide 1.21, "Measuring, Evaluation, and Reporting Radioactivity in Solid Wastes and Releases of Radioactive Materials in Liquid and Gaseous Effluents from Light-Water-Cooled Nuclear Power Plants," are not applicable and not included in this report.

Measurements & Approximations of Total Radioactivity Radioactivity measurements performed in support of the Browns Ferry Nuclear Plant ODCM meet the Lower Limit of Detection requirements given in ODCM Tables 2.2-1 and 2.2-2.

1.

Gaseous Effluents Noble gases in the building vent and stack (elevated) gaseous effluents are continuously monitored. The flow rate of the stack is continuously monitored and the building vent effluent flow rates are calculated once a shift based on the configuration of operating exhaust fans. The vent flow is calculated for each release. Gas grab samples of the stack are taken and analyzed weekly. Gas grab samples of in-service vents are taken and analyzed monthly. The specific noble gas activity concentrations and total volume of the gases are used to calculate the total Curies of noble gases released.

In 2019, Browns Ferry revised noble gas sampling and analysis procedures which included sampling with a larger volume (1240 cc gas Marinelli) and analyzing for a longer count time (1000 seconds). Since this revision, the site has detected low levels of noble gases in the stack vent, which is expected.

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 6 of 165 The tritium concentration is determined by the analysis of a monthly grab sample for each release point.

Iodines and particulates are continuously sampled on impregnated charcoal filters and particulate filters, respectively. The charcoal and particulate samples are replaced at least weekly and analyzed to determine specific activity concentrations. The specific activity concentrations and vent flow rate data are used weekly to verify that release rate limits were not exceeded. The specific activity concentrations and total volume of gaseous effluent are used on a monthly basis to determine the total curies of each particulate and iodine released during the month.

The gross alpha concentration is determined by analysis of a monthly particulate filter composite sample, and strontium-89 and strontium-90 are determined by analysis of a quarterly particulate filter composite sample for each release point.

Carbon-14 (C-14) production and gaseous waste effluent activity source term estimates were based on methodology provided in EPRI 1021106, Estimation of Carbon-14 in Nuclear Power Plant Gaseous Effluents, December 2010. C-14 gaseous activity and dose calculations are made using the following assumptions: (1) continuous release of the estimated C-14 generated for each unit during power operation based on the number of Effective Fuel Power Days (EFPD) for the period, (2) maximum C-14 activity from literature values cited in EPRI Report 1021106, and (3) typical fraction as carbon dioxide for gaseous releases from literature values also cited in EPRI Report 1021106.

In 2019, Browns Ferry updated C-14 production rate estimates utilizing the proxy methodology provided in EPRI Report 1021106. TVA documented this update in Updated Carbon-14 Production Rate Estimates for Gaseous Releases at TVA NPG Sites, October 2019. The C-14 releases increased in 2019 due to all three units completing Extended Power Uprate (EPU). The EPU for each unit increased the units MWth (Megawatt thermal) from 3,458 to 3,952 MWth. This increase in MWth is used in the calculation of C-14 releases. The increase in C-14 releases is expected.

2.

Liquid Effluents The gamma ray emitting radionuclide concentrations are determined for each batch by gamma ray spectroscopy analysis of a grab sample. The allowable release rate is calculated for each batch based upon the known dilution flow. The flow rate of the liquid effluent is continuously monitored and the total volume released in each batch is determined. The total gamma activity released in each batch is determined by multiplying the radionuclide concentrations by the total volume discharged. The total gamma activity released during the month is then determined by summing the gamma activity content of each batch discharged during the month.

The gross alpha and tritium concentrations are measured on a monthly composite sample. The strontium-89, strontium-90, and iron-55 are measured on a quarterly composite sample.

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 7 of 165 Batch Releases

1. Gaseous

2. Liquid Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total

1. Gaseous

1. Number of Batch Releases 1

0 0

0 1

2. Total duration of batch releases minutes 4.80E+01 0.00E+00 0.00E+00 0.00E+00 4.80E+01

3. Maximum batch release duration minutes 4.80E+01 0.00E+00 0.00E+00 0.00E+00 4.80E+01

4. Average batch release duration minutes 4.80E+01 0.00E+00 0.00E+00 0.00E+00 4.80E+01

5. Minimum batch release duration minutes 4.80E+01 0.00E+00 0.00E+00 0.00E+00 4.80E+01 Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total

1. Liquids

1. Number of Batch Releases 22 17 1

5 45

2. Total duration of batch releases minutes 1.29E+04 1.06E+04 1.17E+03 5.43E+03 3.00E+04

3. Maximum batch release duration minutes 1.44E+03 1.98E+03 1.17E+03 1.37E+03 1.98E+03

4. Average batch release duration minutes 5.85E+02 6.21E+02 1.17E+03 1.09E+03 6.67E+02

5. Minimum batch release duration minutes 1.00E+00 2.25E+02 1.17E+03 8.65E+02 1.00E+00

6. Avg stream flow during periods of release of liquid effluent into a flowing stream CFS 7.51E+04 4.39E+04 4.37E+04 4.29E+04 NA

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 8 of 165 Abnormal Releases

1.

Gaseous Abnormal gaseous tritium releases occurred in 2021 from the Auxiliary Boiler System when the boilers were in service for unit outages. The identified source of tritium to the auxiliary boiler system is main steam leak-by from degraded Steam Jet Air Ejector (SJAE) /

Auxiliary Boiler valves to the auxiliary boiler header (CR 1508177). Beginning in 2022, these valves will be replaced during each units respective outage.

2.

Liquid Abnormal liquid tritium releases occurred throughout 2021 from Unit 1, Unit 2, and Unit 3 Station Sumps (CR 1667682). Plant station sumps are auto-pumped to unit specific Condenser Circulating Water (CCW) discharge and subsequently to the Tennessee River.

Identified sources include: main steam leak-by from degraded SJAE / Auxiliary boiler system valves to Unit 1 Station Sump, Vacuum Priming system and multiple steam leaks in the SJAE and Offgas Recombiner rooms.

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total

1. Gaseous

1. Number of abnormal Releases 2

0 0

0 2

2. Total Activity for abnormal releases Ci 5.10E-01 0.00E+00 0.00E+00 0.00E+00 5.10E-01 Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total

2. Liquids

1. Number of abnormal Releases 3

1 3

0 7

2. Total Activity for abnormal releases Ci 7.87E+00 9.59E-02 2.67E-02 0.00E+00 7.99E+00

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 9 of 165 Non-routine Planned Discharges In calendar year 2021 there were no non-routine planned discharges.

Radioactive Waste System Treatment Changes In calendar year 2021 there were no changes to the radwaste system or the process control program (PCP).

Land Use Census Changes In calendar year 2021 there were no changes to the land use census.

Effluent Monitoring Instrument Inoperability > 30 Days In calendar year 2021 there were three gaseous effluent monitoring instruments inoperable > 30 days.

1. CR 1685958 documented 4/13/2021 for Stack 0-RM-90-147/148 sample flow abnormal alarm. AUO dispatched and found both sample pumps not working properly. Operations declared 0-RM-90-147/148 inoperable 4/13/2021 (LCO Tracking # 0-90-ODCM-2021-0014) and compensatory sampling was established. 0-RM-90-147/148 was returned to service 6/1/2021 (CR 1695165).

2. CR 1686789 documented 4/16/2021 for 1-RM-90-249 Communication Channel Failure.

Operations declared 1-RM-90-249 inoperable on 4/15/2021 (LCO Tracking # 1-90-ODCM-2021-0002) and compensatory sampling was established. Per WO 122060811, the CAM is in need of a new CPU, therefore ECP to upgrade CPU (ECP BFN-20-1914-03). 1-RM 249 returned to service 7/16/2021 (CR 1695158).

3. CR 1697594 documented 5/29/2021 for 3-RM-90-249 Communication Channel Failure.

Operations declared 3-RM-90-249 inoperable on 5/29/2021 (LCO Tracking # 3-90-ODCM-2021-0002) and compensatory sampling was established. Per WO 122155448, the CAM is in need of a new CPU, therefore ECP to upgrade CPU (ECP BFN-20-1914-04). 3-RM 249 returned to service 7/24/2021 (CR 1705606).

Effluent Monitoring Equipment Sample Deviation In calendar year 2021 there were two gaseous effluent monitoring sample deviations.

On 6/16/2021, a chemistry technician did not collect two ODCM LCO noble gas samples (1-RM-90-249 and 3-RM-90-249) within the 8 hour9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months ODCM requirement. The technician confused the sample and flow times which caused the noble gas samples to be collected 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months and 58 minutes after the previous sample time (CR 1709478).

Offsite Dose Calculation Manual Changes In calendar year 2021 there were no changes to the Offsite Dose Calculation Manual.

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 10 of 165 Groundwater Monitoring and Program (NEI 07-07)

In 2007, the Nuclear Energy Institute (NEI) established the Groundwater Protection Initiative (GPI), NEI 07-07. The Groundwater Protection Initiative was established to 1) improve management of situations involving inadvertent radiological releases that get into groundwater and 2) to improve communication with external stakeholders to enhance trust and confidence on the part of local communities, States, the NRC, and the public in the nuclear industrys commitment to a high standard of public radiation safety and protection of the environment. This section provides information and sample results from on-site groundwater locations that were sampled in support of the Groundwater Protection Initiative at Browns Ferry Nuclear Plant. The groundwater wells described in this section are not part of the Radiological Environmental Monitoring Program (REMP).

In the early 2000s, BFN initiated a groundwater study to identify the source of low level tritium detected on-site. Results from the groundwater study (Investigation of Tritium Releases to Groundwater, 2006), suggest the source of tritiated groundwater was from historical leaks and spills associated with Radwaste/Condensate transfer tunnel.

Groundwater and surface water level measurements during the study indicated the return channel and subsequently the Tennessee River will ultimately be recipient to tritiated groundwater discharge from the site. Groundwater movement in the area has been determined to be from the plant site toward the Tennessee River (BFN FSAR Chapter 2.4) with no groundwater drinking wells onsite.

On-site groundwater monitoring was performed in 2021. The purpose of on-site groundwater monitoring is to ensure timely detection of inadvertent radiological releases to groundwater. Non-REMP groundwater wells monitor for potential leaks from plant equipment. As part of the GPI, BFN monitored a total of 30 groundwater wells located in the protected area and the owner controlled area during 2021. Normal sampling frequencies are quarterly and semiannually with some wells sampled monthly if certain criteria are met or for investigation purposes. Samples are routinely analyzed for environmental level tritium (H-3) and principle gamma emitters (PGE) with selected wells analyzed for Hard-to-Detect (HTD) radionuclides (Gross Alpha, Fe-55, Ni-63, Sr-89, and Sr-90). In support of the groundwater program, the site also monitors recapture and on-site storm drains, catch basins and surface water.

In 2021, low levels of tritium were detected in on-site groundwater wells as indicated in Table 10, Groundwater Data. Table 10 demonstrates all on-site groundwater wells that indicated detectable tritium concentrations. Tritium concentrations in 2021 ranged from non-detectable (less than 131 pCi/L) up to a maximum concentration of 7,080 pCi/L (MW-1).

BFN has been monitoring a legacy tritium plume in the vicinity of groundwater well Dewat-A located adjacent to the reactor building. This plume is the result of previous leaks in past years (2015 and 2016). No other plant related radionuclides were detected in any groundwater well or surface water sample. There were no instances of any on-site spills or leaks that occurred during 2021 that were communicated to off-site agencies or that met the criteria in NEI 07-07, Appendix A. Using the highest groundwater well tritium concentration of 7,080 uCi/ml, a leak rate of groundwater to the return channel of 0.50 gpm, and a dilution of 20,000, a total of 3.54E-07 curies was estimated to be the groundwater release to the Tennessee river (Investigation of Tritium Releases to Groundwater, 2006).

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 11 of 165 Table 10 - Groundwater Data Sample Date Well ID Tritium Activity (pCi/L)

Sample Date Well ID Tritium Activity (pCi/L) 1st Quarter 2021 2nd Quarter 2021 1/28/2021 Dewat-A 3800 5/14/2021 Dewat-A 839 1/28/2021 MW-08 1120 5/14/2021 MW-01 439 1/28/2021 MW-08i 536 5/14/2021 MW-02i 1070 2/24/2021 Dewat-A 3770 5/13/2021 MW-03 554 2/23/2021 MW-01 7080 5/14/2021 MW-07 2560 2/24/221 MW-02 1050 5/14/2021 MW-08 2990 2/24/2021 MW-02i 212 5/14/2021 MW-08i 413 2/23/2021 MW-03 874 5/13/2021 MW-11 242 2/23/2021 MW-04 4630 5/13/2021 MW-15 225 2/23/2021 MW-07 2780 5/13/2021 MW-18 333 2/24/2021 MW-08 1380 5/13/2021 MW-19 730 2/24/2021 MW-08i 431 2/23/2021 MW-18 222 2/22/2021 MW-19 840 3/22/2021 Dewat-A 2190 3/22/2021 MW-01 1750 3/22/2021 MW-08 1430 3/22/2021 MW-08i 484 3rd Quarter 2021 4th Quarter 2021 8/5/2021 MW-02 654 11/9/2021 Dewat-A 1280 8/5/2021 MW-04 401 11/9/2021 MW-01 741 8/10/2021 Dewat-A 1960 11/9/2021 MW-02 970 8/11/2021 MW-01 1010 11/9/2021 MW-02i 503 8/11/2021 MW-02 888 11/9/2021 MW-03 649 8/10/2021 MW-02i 213 11/9/2021 MW-04 450 8/11/2021 MW-03 731 11/9/2021 MW-08 696 8/11/2021 MW-04 213 11/9/2021 MW8i 395 9/10/2021 MW-07 2190 11/8/2021 MW-15 291 8/11/2021 MW-08 780 11/9/2021 MW-18 513 8/11/2021 MW-08i 528 11/9/2021 MW-19 2240 8/10/2021 MW-18 263 8/10/2021 MW-19 781

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 12 of 165 Errata/Corrections to Previous ARERRs In 2021, it was discovered in the 2019 ARERR there were incorrect particulate concentrations reported in the first and second quarter Gaseous Effluents Summation of all Releases (CR 1696498).

Chemistry performed a review of the data generated for the preparation of 2019 ARERR and found that N-13 radionuclide (from elevated releases) was calculated with the total summation of particulates for the first and second quarters. This resulted in significantly higher particulate concentrations being reported. N-13 has a half-life of less than 10 minutes and should not have been reported with the total particulates. In the 2019 ARERR, Table 1A, Gaseous Effluents - Summation of All Releases is the table with the error. Table 1C - Elevated Releases indicates the correct concentrations, in which N-13 is not reported. The 2019 data reviewed indicated that chemistry did line through the N-13 particulate concentrations (1Q 3.89E+01 and 2Q 4.96E+01) on the elevated release point, however failed to carry that correction over to the gaseous summation of all releases report page. The correct 1Q total gaseous particulate concentration is 5.70E-04 curies. The correct 2Q total gaseous particulate concentration is 2.37E-04 curies.

In conclusion, an administrative error was made to the 2019 ARERR Table 1A Gaseous Effluents - Summation of All Releases in the first and second quarter gaseous particulate concentrations. This error was due to including N-13 (less than 8 day half-life) from the elevated release in the summation of gaseous particulate concentrations. There is no change in actual dose released to the public, as this was an administrative error.

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 13 of 165 III.

Gaseous Effluents Table 1-A Gaseous Effluents - Summation of all Releases 1 Includes activity from abnormal releases. Dilution flow was not determined for abnormal releases.

Applicable Limits are expressed in terms of dose. Reference Section VI, Radiological Impact, Table 3.

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total Est. Total Error A. Fission and Activation Gases

1. Total Release Ci

<LLD 6.98E-01 2.26E+00 4.28E+01 4.57E+01

+/- 45%

2. Average Release Rate

µCi/sec

<LLD 8.88E-02 2.84E-01 5.38E+00 1.45E+00

3. Percent of Limit B. Iodines

1. Total Release Ci 2.63E-04 8.59E-04 1.44E-03 2.16E-03 4.72E-03

+/- 36%

2. Average Release Rate

µCi/sec 3.38E-05 1.09E-04 1.81E-04 2.72E-04 1.50E-04

3. Percent of Limit C. Particulates

1. Total Release Ci 7.77E-04 3.79E-04 3.66E-04 5.84E-04 2.11E-03

+/- 35%

2. Average Release Rate

µCi/sec 9.99E-05 4.82E-05 4.60E-05 7.35E-05 6.68E-05

3. Percent of Limit D. Tritium

1. Total Release Ci 6.73E+011 9.83E+01 7.82E+01 4.10E+01 2.85E+021

+/- 21%

2. Average Release Rate

µCi/sec 8.66E+00 1.25E+01 9.84E+00 5.15E+00 9.03E+00

3. Percent of Limit E. Gross Alpha

1. Total Release Ci

<LLD

<LLD 2.29E-06 2.29E-06 F. Carbon-14

1. Total CO2 Release Ci 1.21E+01 1.28E+01 1.43E+01 1.42E+01 5.33E+01

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 14 of 165 Table 1-B Gaseous Effluents - Ground Level Releases (Batch)1 1 In 2021, there were no gaseous batch releases through the ground mode release points.

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total

1. Fission and Activation Gases Kr-85 Ci NA NA NA NA NA Kr-85m Ci NA NA NA NA NA Kr-87 Ci NA NA NA NA NA Kr-88 Ci NA NA NA NA NA Xe-133 Ci NA NA NA NA NA Xe-135m Ci NA NA NA NA NA Xe-138 Ci NA NA NA NA NA Total For Period Ci NA NA NA NA NA

2. Iodines I-131 Ci NA NA NA NA NA I-133 Ci NA NA NA NA NA I-135 Ci NA NA NA NA NA Total For Period Ci NA NA NA NA NA

3. Particulates Mn-54 Ci NA NA NA NA NA Co-58 Ci NA NA NA NA NA Co-60 Ci NA NA NA NA NA Zn-65 Ci NA NA NA NA NA Sr-89 Ci NA NA NA NA NA Sr-90 Ci NA NA NA NA NA Ag-110m Ci NA NA NA NA NA Cs-134 Ci NA NA NA NA NA Cs-137 Ci NA NA NA NA NA Ba-140 Ci NA NA NA NA NA La-140 Ci NA NA NA NA NA Total For Period Ci NA NA NA NA NA

4. Gross Alpha Gross Alpha Ci NA NA NA NA NA

5. Tritium H-3 Ci NA NA NA NA NA

6. Carbon-14 C-14 Ci NA NA NA NA NA

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 15 of 165 Table 1-B Gaseous Effluents - Ground Level Releases (Continuous) 1 Includes activity from abnormal releases. Dilution flow was not determined for abnormal releases.

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total

1. Fission and Activation Gases Kr-85 Ci

<LLD

<LLD Kr-85m Ci

<LLD

<LLD Kr-87 Ci

<LLD

<LLD Kr-88 Ci

<LLD

<LLD Xe-133 Ci

<LLD

<LLD Xe-135m Ci

<LLD

<LLD Xe-138 Ci

<LLD

<LLD Total For Period Ci

<LLD

2. Iodines I-131 Ci 8.14E-06 2.84E-06 8.67E-06 1.22E-04 1.42E-04 I-133 Ci 8.85E-06 3.01E-05 2.12E-05 1.07E-04 1.67E-04 I-135 Ci

<LLD

<LLD Total For Period Ci 1.70E-05 3.29E-05 2.99E-05 2.29e-04 3.09E-04

3. Particulates Mn-54 Ci 2.43E-06

<LLD

<LLD 2.43E-06 Co-58 Ci

<LLD

<LLD Co-60 Ci 9.97E-06 5.66E-06

<LLD

<LLD 1.56E-05 Ag-110m Ci 2.05E-06

<LLD

<LLD 2.05E-06 Zn-65 Ci

<LLD

<LLD Sr-89 Ci

<LLD

<LLD Sr-90 Ci

<LLD

<LLD Cs-134 Ci

<LLD

<LLD Cs-137 Ci

<LLD

<LLD Ba-140 Ci

<LLD

<LLD La-140 Ci

<LLD

<LLD Total For Period Ci 1.45E-05 5.66E-06

<LLD

<LLD 2.01E-05

4. Gross Alpha Gross Alpha Ci

<LLD

<LLD 9.30E-08 9.30E-08

5. Tritium H-3 Ci 2.57E+011 2.34E+01 1.73E+01 1.94E+01 8.58E+011

6. Carbon-14 C-14 Ci

<LLD

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 16 of 165 Table 1-C Gaseous Effluents - Elevated Releases (Batch)

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total

1. Fission and Activation Gases Kr-85 Ci

<LLD NA NA NA

<LLD Kr-85m Ci

<LLD NA NA NA

<LLD Kr-87 Ci

<LLD NA NA NA

<LLD Kr-88 Ci

<LLD NA NA NA

<LLD Xe-133 Ci

<LLD NA NA NA

<LLD Xe-135m Ci

<LLD NA NA NA

<LLD Xe-138 Ci

<LLD NA NA NA

<LLD Total For Period Ci

<LLD NA NA NA

<LLD

2. Iodines I-131 Ci

<LLD NA NA NA

<LLD I-133 Ci

<LLD NA NA NA

<LLD I-135 Ci

<LLD NA NA NA

<LLD Total For Period Ci

<LLD NA NA NA

<LLD

3. Particulates Mn-54 Ci

<LLD NA NA NA

<LLD Co-58 Ci

<LLD NA NA NA

<LLD Co-60 Ci

<LLD NA NA NA

<LLD Zn-65 Ci

<LLD NA NA NA

<LLD Sr-89 Ci

<LLD NA NA NA

<LLD Sr-90 Ci

<LLD NA NA NA

<LLD Ag-110m Ci

<LLD NA NA NA

<LLD Cs-134 Ci

<LLD NA NA NA

<LLD Cs-137 Ci

<LLD NA NA NA

<LLD Ba-140 Ci

<LLD NA NA NA

<LLD La-140 Ci

<LLD NA NA NA

<LLD Total For Period Ci

<LLD NA NA NA

<LLD

4. Gross Alpha Gross Alpha Ci

<LLD NA NA NA

<LLD

5. Tritium H-3 Ci 1.79E-03 NA NA NA 1.79E-03

6. Carbon-14 C-14 Ci NA NA NA NA NA

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 17 of 165 Table 1-C Gaseous Effluents - Elevated Releases (Continuous)

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total

1. Fission and Activation Gases Ar-41 Ci

<LLD 6.98E-01 2.26E+00 1.86E+00 4.82E+00 Kr-85m Ci

<LLD

<LLD 4.89E+00 4.89E+00 Kr-85 Ci

<LLD

<LLD Kr-87 Ci

<LLD

<LLD 1.30E+00 1.30E+00 Kr-88 Ci

<LLD

<LLD 9.78E+00 9.78E+00 Xe-133 Ci

<LLD

<LLD 2.17E+01 2.17E+01 Xe-135 Ci

<LLD

<LLD 3.24E+00 3.24E+00 Xe-135m Ci

<LLD

<LLD Xe-138 Ci

<LLD

<LLD Total For Period Ci

<LLD 6.98E-01 2.26E+00 4.27E+01 4.57E+01

2. Iodines I-131 Ci 3.65E-05 2.38E-05 3.97E-05 6.55E-04 7.55E-04 I-133 Ci 1.37E-04 1.07E-04 2.02E-04 6.55E-04 1.10E-03 I-135 Ci

<LLD

<LLD Total For Period Ci 1.73E-04 1.31E-04 2.41E-04 1.31E-03 1.85E-03

3. Particulates Au-199 Ci 1.76E-04 9.96E-05 1.44E-04 3.03E-04 7.23E-04 Na-24 Ci

<LLD

<LLD 1.00E-04 1.00E-04 Mn-54 Ci

<LLD

<LLD Co-58 Ci

<LLD

<LLD 8.44E-06 8.44E-06 Co-60 Ci

<LLD

<LLD 4.71E-06 4.71E-06 Zn-65 Ci

<LLD

<LLD Zn-69m Ci

<LLD

<LLD 1.37E-04 1.37E-04 Sr-89 Ci 5.16E-06 1.53E-06 7.15E-06 1.23E-05 2.61E-05 Sr-90 Ci

<LLD 1.26E-06

<LLD

<LLD 1.26E-06 Cs-134 Ci

<LLD

<LLD Cs-137 Ci

<LLD

<LLD Ba-139 Ci

<LLD 9.91E-06

<LLD

<LLD 9.91E-06 Ba-140 Ci

<LLD

<LLD 6.94E-06 6.94E-06 La-140 Ci

<LLD

<LLD Np-239 Ci 2.12E-05

<LLD

<LLD 2.12E-05 Total For Period Ci 2.03E-04 1.12E-04 1.51E-04 5.72E-04 1.04E-03

4. Gross Alpha Gross Alpha Ci

<LLD

5. Tritium H-3 Ci 6.34E+00 6.24E+00 6.51E+00 3.11E+00 2.22E+01

6. Carbon-14 C-14 Ci 1.21E+01 1.28E+01 1.43E+01 1.42E+01 5.33E+01

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 18 of 165 Table 1-D Gaseous Effluents - Mixed Mode Releases (Batch)1 1 In 2021, there were no gaseous batch releases through the mixed mode release points.

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total

1. Fission and Activation Gases Kr-85 Ci NA NA NA NA NA Kr-85m Ci NA NA NA NA NA Kr-87 Ci NA NA NA NA NA Kr-88 Ci NA NA NA NA NA Xe-133 Ci NA NA NA NA NA Xe-135m Ci NA NA NA NA NA Xe-138 Ci NA NA NA NA NA Total For Period Ci NA NA NA NA NA

2. Iodines I-131 Ci NA NA NA NA NA I-133 Ci NA NA NA NA NA I-135 Ci NA NA NA NA NA Total For Period Ci NA NA NA NA NA

3. Particulates Mn-54 Ci NA NA NA NA NA Co-58 Ci NA NA NA NA NA Co-60 Ci NA NA NA NA NA Zn-65 Ci NA NA NA NA NA Sr-89 Ci NA NA NA NA NA Sr-90 Ci NA NA NA NA NA Ag-110m Ci NA NA NA NA NA Cs-134 Ci NA NA NA NA NA Cs-137 Ci NA NA NA NA NA Ba-140 Ci NA NA NA NA NA La-140 Ci NA NA NA NA NA Total For Period Ci NA NA NA NA NA

4. Gross Alpha Gross Alpha Ci NA NA NA NA NA

5. Tritium H-3 Ci NA NA NA NA NA

6. Carbon-14 C-14 Ci NA NA NA NA NA

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 19 of 165 Table 1-D Gaseous Effluents - Mixed Mode Releases (Continuous)

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total

1. Fission and Activation Gases Kr-85 Ci

<LLD

<LLD Kr-85m Ci

<LLD

<LLD Kr-87 Ci

<LLD

<LLD Kr-88 Ci

<LLD

<LLD Xe-133 Ci

<LLD

<LLD Xe-135m Ci

<LLD

<LLD Xe-138 Ci

<LLD

<LLD 2.18E-02 2.18E-02 Total For Period Ci

<LLD

<LLD 2.18E-02 2.18E-02

2. Iodines I-131 Ci 2.10E-05 8.88E-05 2.23E-04 2.79E-04 6.11E-04 I-133 Ci 5.21E-05 6.07E-04 9.42E-04 3.46E-04 1.95E-03 I-135 Ci

<LLD

<LLD Total For Period Ci 7.31E-05 6.96E-04 1.16E-03 6.24E-04 2.56E-03

3. Particulates Au-199 Ci 3.05E-05

<LLD

<LLD 3.05E-05 Cr-51 Ci 2.36E-04 6.30E-06

<LLD

<LLD 2.42E-04 Mn-54 Ci 1.38E-05

<LLD

<LLD 1.21E-06 1.50E-05 Co-58 Ci 3.54E-05

<LLD

<LLD 3.54E-05 Co-60 Ci 1.84E-04 1.91E-04 1.39E-04 1.04E-05 5.25E-04 Zn-65 Ci 5.31E-06 1.63E-05

<LLD

<LLD 2.16E-05 Zn-69m Ci 3.72E-05

<LLD

<LLD 3.72E-05 Se-75 Ci 4.83E-06 5.48E-06 1.80E-06

<LLD 1.21E-05 As-76 Ci

<LLD

<LLD 7.02E-05

<LLD 7.02E-05 Sr-89 Ci

<LLD

<LLD Sr-90 Ci

<LLD

<LLD Nb-95 Ci

<LLD

<LLD 4.06E-06

<LLD 4.06E-06 Ag-110m Ci 9.58E-06 6.21E-06

<LLD

<LLD 1.58E-05 Cs-134 Ci

<LLD

<LLD Cs-137 Ci

<LLD

<LLD Ba-140 Ci

<LLD

<LLD La-140 Ci

<LLD

<LLD Mo-99 Ci

<LLD 3.53E-05

<LLD

<LLD 3.53E-05 Sb-124 Ci 2.86E-06

<LLD

<LLD 2.86E-06 Total For Period Ci 5.60E-04 2.61E-04 2.15E-04 1.16E-05 1.05E-03

4. Gross Alpha Gross Alpha Ci

<LLD

<LLD 2.19E-06 2.19E-06

5. Tritium H-3 Ci 3.52E+01 6.87E+01 5.44E+01 1.85E+01 1.77E+02

6. Carbon-14 C-14 Ci

<LLD

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 20 of 165 IV.

Liquid Effluents Table 2-A Liquid Effluents - Summation of all Releases 1 Includes activity from abnormal releases. Dilution flow was not determined for abnormal releases.

Applicable Limits are expressed in terms of dose. Reference Section VI, Radiological Impact, Table 4.

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total Est. Total Error A. Fission and Activation Products

1. Total Release CI 7.50E-02 3.52E-02 1.19E-05 6.56E-05 1.10E-01

+/- 9%

2. Average Diluted Concentration

µCi/mL 2.21E-09 1.34E-09 4.47E-12 9.70E-12 1.52E-09

3. Percent of Limit B. Tritium

1. Total Release Ci 1.10E+011 3.82E+001 4.47E-021 1.83E-01 1.51E+011

+/- 6%

2. Average Diluted Concentration

µCi/mL 3.24E-07 1.46E-07 1.68E-08 1.91E-08 2.08E-07

3. Percent of Limit C. Dissolved and Entrained Noble Gases

1. Total Release CI 5.33E-06 4.15E-06

<LLD

<LLD 9.49E-06

+/- 8%

2. Average Diluted Concentration

µCi/mL 1.57E-13 1.58E-13

<LLD

<LLD 1.31E-13

3. Percent of Limit D. Gross Alpha Radioactivity

1. Total Release Ci

<LLD

+/- 48%

E. Volume of Liquid Waste to Discharge Canal (prior to dilution)

Liters 1.63E+06 1.21E+06 8.33E+04 4.16+05 3.34E+06

+/- 3%

F. Volume of Dilution Water Liters 3.40E+10 2.62E+10 2.66E+09 9.60E+09 7.25E+10

+/- 10%

G. Total CCW Gigagal 2.41E+02 2.60E+02 2.80E+02 2.76E+02 1.06E+03

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 21 of 165 Table 2-B Liquid Effluents - Batch Mode Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total

1. Fission and Activation Products F-18 Ci 6.02E-04 1.80E-05

<LLD

<LLD 6.20E-04 Na-24 Ci 5.84E-03

<LLD

<LLD 5.84E-03 Cr-51 Ci 1.14E-05

<LLD

<LLD 1.14E-05 Mn-54 Ci 4.03E-03 4.09E-03

<LLD

<LLD 8.13E-03 Mn-56 Ci 3.41E-06

<LLD

<LLD 3.41E-06 Fe-55 Ci 5.27E-03 1.58E-03

<LLD

<LLD 6.85E-03 Fe-59 Ci 3.61E-06

<LLD

<LLD 3.61E-06 Co-57 Ci

<LLD 7.42E-06

<LLD

<LLD 7.42E-06 Co-58 Ci 2.34E-03 2.31E-03

<LLD

<LLD 4.65E-03 Co-60 Ci 1.33E-02 1.63E-02

<LLD

<LLD 2.96E-02 Zn-65 Ci 3.56E-02 8.72E-03

<LLD

<LLD 4.43E-02 Zn-69m Ci 1.92E-06

<LLD

<LLD 1.92E-06 Nb-97 Ci 5.21E-06 7.41E-05

<LLD

<LLD 7.93E-05 Ag-110m Ci 2.27E-03 1.56E-03

<LLD

<LLD 3.83E-03 As-76 Ci 3.69E-05

<LLD

<LLD 3.69E-05 Sr-89 Ci 1.36E-03

<LLD

<LLD 1.36E-03 Sr-90 Ci

<LLD 1.52E-04

<LLD

<LLD 1.52E-04 Sr-92 Ci 9.58E-05 5.62E-05

<LLD

<LLD 1.52E-04 Y-91m Ci 1.48E-05

<LLD

<LLD 1.48E-05 Sb-122 Ci 1.23E-05

<LLD

<LLD 1.23E-05 Sb-124 Ci 2.85E-04

<LLD

<LLD 2.85E-04 Cs-134 Ci 1.03E-03

<LLD

<LLD 1.03E-03 Cs-137 Ci 2.75E-03 3.23E-04 1.19E-05 6.56E-05 3.15E-03 Ba-140 Ci 1.19E-04

<LLD

<LLD 1.19E-04 La-140 Ci 3.05E-05 1.45E-05

<LLD

<LLD 4.51E-05 Total For Period Ci 7.50E-02 3.52E-02 1.19E-05 6.56E-05 1.10E-01

2. Tritium H-3 Ci 3.15E+00 3.72E+00 1.80E-02 1.83E-01 7.07E+00 Total For Period Ci 3.15E+00 3.72E+00 1.80E-02 1.83E-01 7.07E+00

3. Dissolved and Entrained Gases Xe-135 Ci 5.33E-06 4.15E-06

<LLD

<LLD 9.49E-06 Total For Period Ci 5.33E-06 4.15E-06

<LLD

<LLD 9.49E-06

4. Gross Alpha Total For Period Ci

<LLD

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 22 of 165 Table 2-B Liquid Effluents - Continuous Mode1 1 In 2021, there were no liquid continuous releases.

Units 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total

1. Fission and Activation Products Co-58 Ci NA NA NA NA NA Co-60 Ci NA NA NA NA NA Cs-137 Ci NA NA NA NA NA Total For Period Ci NA NA NA NA NA

2. Dissolved and Entrained Gases Xe-133 Ci NA NA NA NA NA Xe-135 Ci NA NA NA NA NA Total For Period Ci NA NA NA NA NA

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 23 of 165 V.

Solid Waste Storage and Shipment Solid Waste Shipped Off-site for Burial or Disposal (Not Irradiated Fuel)

1. Type of Waste Units Jan-Jun Jul-Dec

% Error

a. Spent resins, filters, filter sludge m3 1.11E+02 1.25E+02

+/-25.0 evaporator bottoms, etc.

Ci 9.32E+02 1.26E+02

+/-25.0

b.

Dry compressible waste, contaminated m3 2.19E+03 851E+02

+/-25.0 equipment, etc.

Ci 5.30E+00 4.11E+00

+/-25.0

c.

Irradiated components, control rod m3 2.41E+00 7.39E-01

+/-25.0 blades & LPRMs with fission chambers Ci 7.71E+03 3.07E+04

+/-25.0

d.

Other - Combined Packages m3 0.00E+00 0.00E+00

+/-25.0 Ci 0.00E+00 0.00E+00

+/-25.0

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 24 of 165

2. Estimate of major nuclide composition (by type of waste)

a. Spent resins, filters, filter sludge evaporator bottoms, etc.

Nuclide Percentage Curies

1.

H-3 0.14%

1.48E+00

2.

C-14 0.05%

5.63E-01

3.

Cr-51 0.08%

8.19E-01

4.

Mn-54 7.83%

8.30E+01

5.

Fe-55 24.22%

2.57E+02

6.

Co-57 0.02%

2.00E-01

7.

Co-58 5.59%

5.93E+01

8.

Co-60 42.39%

4.49E+02

9.

Ni-59 0%

3.81E-03

10.

Ni-63 0.66%

6.98E+00

11.

Zn-65 8.35%

8.85E+01

12.

Sr-89 0.23%

2.49E+00

13.

Sr-90 0.01%

7.43E-02

14.

Zr-95 0.21%

2.19E+00

15.

Nb-95 0.53%

5.65E+00

16.

Tc-99 0.01%

9.56E-02

17.

Ag-110m 7.62%

8.08E+01

18.

Sn-113 0.01%

1.24E-01

19.

Sb-124 0.02%

1.64E-01

20.

Sb-125 0.05%

5.21E-01

21.

Cs-134 0.07%

7.86E-01

22.

Cs-137 1.86%

1.98E+01

23.

Ce-144 0.03%

3.67E-01

24.

Pu-238 0%

3.65E-05

25.

Pu-239 0%

1.07E-05

26.

Pu-241 0%

4.07E-03

27.

Am-241 0%

5.60E-04

28.

Cm-243 0%

6.80E-05

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 25 of 165

b. Dry compressible waste, contaminated equipment, etc.

Nuclide Percentage Curies

1.

H-3 0.31%

2.94E-02

2.

Cr-51 1.52%

1.43E-01

3.

Mn-54 6.18%

5.82E-01

4.

Fe-55 20.58%

1.94E+00

5.

Co-57 0.01%

6.98E-04

6.

Co-58 2.04%

1.92E-01

7.

Co-60 52.22%

4.92E+00 8

Ni-63 0.36%

3.36E-02

9.

Zn-65 5.49%

5.17E-01

10.

Sr-89 0%

2.32E-04

11.

Sr-90 0.02%

1.64E-03

12.

Nb-95 0.69%

6.48E-02

13.

Tc-99 0%

3.20E-04

14.

Ag-110m 5.65%

5.33E-01

15.

Sb-125 0.32%

2.98E-02

16.

Cs-134 0.06%

5.24E-03

17.

Cs-137 4.57%

4.31E-01

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 26 of 165

c. Irradiated components, control rod blades & LPRMs with fission chambers Nuclide Percentage Curies

1.

H-3 0.01%

4.08E+00

2.

C-14 0.01%

4.26E+00

3.

Cr-51 0.65%

2.48E+02

4.

Mn-54 1.31%

5.03E+02

5.

Fe-55 40.05%

1.54E+04

6.

Fe-59 0.07%

2.51E+01

7.

Co-58 0.48%

1.86E+02

8.

Co-60 47.41%

1.82E+04

9.

Ni-59 0.03%

1.30E+01

10.

Ni-63 7.02%

2.70E+03

11.

Zn-65 0.03%

1.27E+01

12.

Sr-90 0%

3.42E-01

13.

Zr-95 0%

3.90E-01

14.

Nb-94 0%

7.53E-02

15.

Nb-95 0%

6.09E-01

16.

Tc-99 0%

1.43E-02

17.

Ag-110m 0%

1.92E-04

18.

Sb-124 0%

1.07E+00

19.

Sb-125 0%

6.49E-02

20.

Cs-137 0%

3.68E-01

21.

Ce-144 0%

3.13E-01

22.

Hf-181 1.32%

5.07E+02

23.

Ta-182 1.59%

6.13E+02

24.

U-235 0%

1.97E-07

25.

Np-237 0%

2.57E-06

26.

Pu-238 0%

3.43E-02

27.

Pu-239 0%

2.19E-05

28.

Pu-240 0%

3.15E-05

29.

Pu-241 0%

6.59E-03

30.

Am-241 0%

3.53E-05

31.

Am-243 0%

2.52E-06

32.

Cm-242 0%

7.10E-04

33.

Cm-243 0%

1.77E-06

34.

Cm-244 0%

3.91E-04

d. Other -Combined Packages Nuclide Percentage Curies

1.

0 0

0

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Page 27 of 165

3. Sold Waste Disposition Number of Shipments Mode of Transportation Destination 1

Canal Barge Company Energy Solutions Memphis 1790 Dock Street 3

ESS (TVA)

TOXCO, Inc.

Materials Management Center 15 Hittman Transport Services Energy Solutions Clive Bulk Waste Facility-Clive Disposal Site-Bulk Waste Facility 38 Hittman Transport Services Energy Solutions LLC.(Clive)

Clive Disposal Site - Containerized Waste Facility 4

Hittman Transport Services Energy Solutions Memphis 1790 Dock Street 10 Hittman Transport Services Energy Solutions Services Inc.

1560 Bear Creek Road 4

Hittman Transport Services Waste Control Specialist, LLC CWF 1

Interstate Ventures, Inc.

Energy Solutions Services Inc.

1560 Bear Creek Road 1

Interstate Ventures, Inc.

TOXCO, Inc.

Materials Management Center 9

Interstate Ventures, Inc.

Waste Control Specialist, LLC CWF 47 Specialty Transport, Inc.

Unitech Service Group, Inc.

Oak Ridge Services Center Irradiated Fuel Shipments (Disposition)

Number of Shipments Mode of Transportation Destination 0

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Radiological Impact Page 28 of 165 VI.

Radiological Impact to Man Introduction Potential doses to the "maximum exposed individual" and the population around Browns Ferry Nuclear Plant (BFN) are calculated for each quarter as required in Section 5.2 of the Offsite Dose Calculation Manual (ODCM). The methodology used to estimate dose for determining plant releases for the reporting period is specified in Sections 6 and 7 of the ODCM. Dispersion of radioactive effluents in the environment is estimated using meteorological data and river flow measured during the period. In this report, the doses resulting from releases are described and compared to limits established for BFN.

Dose Limits The ODCM specifies limits for the release of radioactive effluents, as well as limits for doses to the general public from the release of radioactive effluents. These limits are set well below the Technical Specification limits which govern the concentrations of radioactivity and doses permissible in unrestricted areas. This ensures that radioactive effluent releases are As Low As Reasonably Achievable (ALARA).

The air dose limits in areas at and beyond the Site Boundary due to noble gases released in gaseous effluents per unit are:

5 mrad per quarter and 10 mrad per year for gamma radiation.

and 10 mrad per quarter and 20 mrad per year for beta radiation.

The dose limits to a member of the public in an unrestricted area from radioiodines, radioactive materials in particulate form, and radionuclides other than noble gases with half lives > 8 days released in gaseous effluents for each unit are:

7.5 mrem per quarter and 15 mrem per year to any organ.

The dose or dose commitment to a member of the public from radioactive material in liquid effluents released to unrestricted areas are:

1.5 mrem per quarter and 3 mrem per year to the total body, and 5 mrem per quarter and 10 mrem per year to any organ.

The limit for the total effective dose equivalent to an individual member of the public inside the site boundary is:

100 mrem per year.

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Radiological Impact Page 29 of 165 The Environmental Protection Agency limits for total dose to any member of the public in the vicinity of a nuclear power plant, established in the Environmental Dose Standard of 40 CFR 190, are:

25 mrem per year to the whole body, 75 mrem per year to the thyroid, and 25 mrem per year to any other organ.

Dose Calculations Estimated doses to members of the public are determined using computer models (the Gaseous Effluent Licensing Code, and the Quarterly Water Dose Assessment Code (QWATA)).

These models are based on guidance provided by the Nuclear Regulatory Commission (NRC) for determining the potential dose to individuals and populations living in the vicinity of the plant. The area around the plant is analyzed to determine the pathways through which the public may receive a dose. The doses calculated are a representation of the dose to a "maximum exposed individual." Some of the factors used in these calculations (such as ingestion rates) are maximum values to ensure conservative reporting of data. The values chosen will tend to overestimate the dose. The expected dose to actual individuals is lower.

The calculated doses are presented in Tables 3, 4, and 5.

Doses from Airborne Effluents For airborne effluents, members of the public can be exposed to radiation from several sources: direct radiation from the radioactivity in the air, direct radiation from radioactivity deposited on the ground, inhalation of airborne radioactivity, ingestion of vegetation which contains radioactivity deposited from the atmosphere, and ingestion of milk and beef which contains radioactivity deposited from the atmosphere onto vegetation and subsequently consumed by animals.

Releases from the stack are considered to be elevated releases. The Joint Frequency Distributions (JFDs) for elevated releases are based on wind directions and wind speeds measured at 90.29 meters and the vertical temperature difference between 10.03 and 89.59 meters, and are given for each quarter in the 2021 Meteorological Data Tables.

Meteorological variables at BFN are measured continuously. Measurements collected include wind speed and wind direction at heights of 10.5, 45.74, and 90.29 meters above the ground, and temperature at heights of 10.03, 45.30, and 89.59 meters above the ground.

Quarterly JFDs are calculated for each release point using the appropriate levels of meteorological data. A quarterly JFD gives the percentage of the time that the wind is blowing out of a particular upwind compass sector in a particular range of wind speeds for a given stability class A through G. The wind speeds are divided into nine wind speed ranges.

Calms are distributed by direction in proportion to the distribution of non-calm wind directions less than 1.6 m/s (3.5 mph). Stability classes are determined from the vertical temperature difference between two measurement levels.

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Radiological Impact Page 30 of 165 The generally open terrain around BFN does not cause any significant effects on the transport and dispersion of gaseous effluents from the plant. Within 30 kilometers of BFN, the terrain is mostly gently rolling hills (30-60 meters). Between 30 and 80 kilometers, the hills become larger to the north and south and mountainous to the east and northeast. The Tennessee River/Wheeler Lake may have a minor effect on transport and dispersion in the immediate vicinity of BFN during periods of winds with a southerly component, overcast skies, and relatively high wind speeds. Also, the lower layer (10-45 meters) stability class tends to be more stable. However, during this infrequent condition, dose estimates will be conservative.

Dose calculated for maximum external air dose (gamma-air and beta-air) are made for points at and beyond the unrestricted area boundary as described in the BFN ODCM. The highest of these doses is then selected.

External doses to the skin and total body, due to submersion in a cloud of noble gases, are calculated for the nearest residence in each sector. The residence with the highest dose is then selected from all sectors.

Dose to an organ due to releases of airborne effluents are estimated for the inhalation, ground contamination, and ingestion pathways. The ingestion pathway is further divided into three possible contributing pathways: ingestion of cow/goat milk, ingestion of beef, and ingestion of vegetables. Doses from applicable pathways are calculated for each receptor location identified in the most recent land use survey. To determine the maximum organ dose, the doses from the pathways are summed for each receptor. However, for the ingestion dose, only those pathways that exist for each receptor are considered in the sum, e.g., milk ingestion doses are included only for locations where milk was consumed without commercial preparation and vegetable ingestion is included only for those locations where a garden was identified. To conservatively account for beef ingestion, a beef ingestion dose equal to that for the highest unrestricted area boundary location is added to each identified receptor. For ground contamination, the dose added to the organ dose being calculated is the total body dose calculated for that location, i.e., it is assumed that the dose to an individual organ is equal to the total body dose.

The maximum organ dose, thyroid dose, and total body dose from airborne effluents are presented in Table 3.

Doses from Liquid Effluents For liquid effluents, the public can be exposed to radiation from three sources: the ingestion of water from the Tennessee River, the ingestion of fish caught in the Tennessee River, and direct exposure from radioactive material deposited on the river shoreline sediment (recreation). The concentration of radionuclides in the Tennessee River is calculated by a computer model which uses measured hydraulic data downstream of BFN.

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Radiological Impact Page 31 of 165 Parameters used to determine the doses are based on guidance given by the NRC for maximum ingestion rates, exposure times, etc.

Wherever possible, parameters used in the dose calculation are site specific. The models that are used to estimate doses, as well as the parameters input to the models, are described in detail in the BFN ODCM.

Radionuclide concentrations in the Tennessee River are calculated assuming that releases in liquid effluents are continuous. When necessary, liquid releases from BFN, located at Tennessee River Mile 294, are made through diffusers which extend into the Tennessee River. It is assumed that releases to the river through these diffusers will initially be entrained in one-fifth of the water which flows past the plant. The QWATA code makes the assumption that this mixing condition holds true until the water is completely mixed at the first downstream dam (Wheeler Dam), at Tennessee River Mile 283.

Doses are calculated for locations within a 50 mile radius downstream of the plant site.

The maximum potential recreation dose is calculated for a location immediately downstream from the plants release point. The maximum exposed individual dose from ingestion of fish is assumed to be that calculated for the consumption of fish caught anywhere between the plant and the first downstream dam. The maximum exposed individual dose from drinking water is assumed to be that calculated at the nearest downstream public water supply [West Morgan - East Lawrence (WMEL)]. This could be interpreted as indicating that the maximum exposed individual, as assumed for liquid releases from BFN, is an individual who obtains all drinking water at WMEL, consumes fish caught from the Tennessee River between BFN and Wheeler Dam, and spends 500 hours0.00579 days 0.139 hours 8.267196e-4 weeks 1.9025e-4 months per year on the shoreline just downstream of the plants release point. Doses calculated for the maximum exposed individual due to liquid effluents for each quarter in the period are presented in Table 4 along with the average river flows past the plant site for the periods.

Population Doses Population doses due to airborne effluents are calculated for people living within a 50-mile radius of the plant site. Doses from external pathways and inhalation are based on the 50-mile human population distribution. Ingestion population doses are calculated assuming that each individual consumed milk, vegetables, and meat produced within the sector in which the individual resides.

Population doses due to liquid effluents are calculated for the entire downstream Tennessee River population. Water ingestion population doses are calculated using actual population figures for downstream public water supplies. Fish ingestion population doses are calculated assuming that all sport fish caught in the Tennessee River are consumed by the Tennessee River population. Recreation population doses are calculated using historical recreational data on the number of shoreline visits at downstream locations.

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Radiological Impact Page 32 of 165 Population doses calculated for airborne and liquid effluents are presented in Tables 3 and 4.

Offsite Direct Radiation Dose External gamma radiation levels were measured by environmental dosimeters deployed around BFN as part of the 2021 Radiological Environmental Monitoring Program (REMP). The 2021 environmental dosimeters were evaluated in accordance with the guidance provided in ANSI N13.37-2014. The process of this evaluation is summarized: 1) The average field dosimeter results is determined for each location and normalized to a standard quarter of 91 days, 2) The field results is adjusted by the transit and shield (storage) dose to determine the net dose at each location; this is performed at each location for each quarter, and the four quarters are summed to determine the annual net dose, 3) The quarterly and annual historical average net dose was determined for each monitoring location, based on data from 2017-2021, 4) The standard deviation of each historical net dose was calculated, to determine the 90th percentile standard deviation for both the quarterly and annual results, 5) the 2021 quarterly and annual net dose are compared to the historical averages (plus 3 times the 90th percentile standard deviation, also known as the minimum differential dose) to determine if any facility related dose was identified at any location during any quarter or the year.

The monitoring locations are grouped according to the distance from the plant. The onsite group consists of dosimeters within 2 miles of the plant. The offsite group consists of all locations greater than 2 miles from the plant. This difference in onsite and offsite averages is consistent with levels measured for preoperational and construction phases at BFN where the average radiation levels onsite were generally 2-6 mrem/quarter higher than the levels offsite. This may be attributed to natural variations in environmental radiation levels, earth moving activities onsite, the mass of concrete employed in the construction of the plant, or other undermined influences. In order to implement the methodology of ANSI N13.37-2014, the dose received by dosimeters in shielded storage that are used as unexposed controls was determined. This in turn was used to account for extraneous dose that should be removed from the gross measurements as measured by field dosimeters.

The result of the evaluation of environmental dosimeters is that there were no facility related dose measured in the environment around Browns Ferry. There were no quarterly or annual dosimeters that exceed the historical baseline plus the calculated minimum differential dose.

Dose to a Member of the Public Inside the Site Boundary Pursuant to ODCM Section 7.7.5, a review was performed to determine the highest dose to a hypothetical member of the public in the site boundary. The dose to a member of the public consists of the sum of dose commitments from effluent releases as well as any direct radiation dose. The gaseous effluent dose commitment is negligible compared to the direct radiation dose.

The direct radiation dose was determined from area REMP environmental dosimeters located onsite. The critical location was determined to be an Optically Stimulated Luminescence (OSL) dosimeter near the Livewell Center (SE-1). The direct radiation dose at

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Radiological Impact Page 33 of 165 the Livewell Center, accounting for background and occupancy, was determined to be not detectable as this location did not exceed the historical baseline plus the calculated minimum differential dose.

The total annual dose commitment to a member of the public for 2021 was not detectable. It is concluded that the dose limit for a member of the public at the site boundary, as specified in 10 CFR 20.1301, less than 100 mrem/year was not exceeded.

Total Dose To determine compliance with 40 CFR 190, annual total dose contributions to the maximum exposed individual from BFN radioactive effluents and all other nearby uranium fuel cycle sources are considered.

The annual dose to any organ other than the thyroid for the maximum exposed individual is conservatively calculated by summing the following doses: the total body air submersion dose for each quarter, the critical organ dose (for any organ other than the thyroid) from airborne effluents for each quarter from ground contamination, inhalation and ingestion, the total body dose from liquid effluents for each quarter, the maximum organ dose (for any organ other than the thyroid) from liquid effluents for each quarter, and any identifiable increase in direct radiation dose levels as measured by the REMP. This dose is compared to the 40 CFR 190 limit for total body or any organ dose (other than the thyroid) to determine compliance.

The annual thyroid dose to the maximum exposed individual is conservatively estimated by summing the following doses: the total body air submersion dose for each quarter, the thyroid dose from airborne effluents for each quarter, the total body dose from liquid effluents for each quarter, the thyroid dose from liquid effluents for each quarter, and any identifiable increase in direct radiation dose levels as measured by the REMP. This dose is compared to the 40 CFR 190 limit for thyroid dose to determine compliance.

Total dose from the fuel cycle is presented in Table 5.

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Radiological Impact Page 34 of 165 Tables Table 3-A Doses from Airborne Effluents - 1st Quarter Individual Doses Pathway Dose Quarterly Limit Percent of Limit Location Beta Air 0.00E+00 mrad 10 mrad

< 1 NA Gamma Air 0.00E+00 mrad 5 mrad

< 1 NA NG Skin 0.00E+00 mrad NA NA NA NG Total Body 0.00E+00 mrad NA NA NA Organ Doses (Iodine, Tritium, Particulates with >8-Day half-life)

Child / Thyroid 8.79E-03 mrem 7.5 mrem

< 1 E 1530 meters Child / Total Body 8.82E-03 mrem 7.5 mrem

< 1 E 1530 meters Child / Bone 2.44E-02 mrem 7.5 mrem

< 1 SSW 4880 meters Population Doses Total Body Dose 1.93E-01 man-rem Maximum Organ Dose (Organ) 8.01E-01 man-rem (Bone)

Table 3-B Doses from Airborne Effluents - 2nd Quarter Individual Doses Pathway Dose Quarterly Limit Percent of Limit Location Beta Air 6.48E-07 mrad 10 mrad

< 1 NNW 4800 meters Gamma Air 6.00E-06 mrad 5 mrad

< 1 NNW 4800 meters NG Skin 7.19E-06 mrad NA NA NNW 1650 meters NG Total Body 6.91E-06 mrad NA NA NNW 1650 meters Organ Doses (Iodine, Tritium, Particulates with >8-Day half-life)

Child / Thyroid 1.25E-02 mrem 7.5 mrem

< 1 NNW 4350 meters Child / Total Body 1.25e-02 mrem 7.5 mrem

< 1 NNW 4350 meters Child / Bone 4.04E-02 mrem 7.5 mrem

< 1 NNW 4350 meters Population Doses Total Body Dose 2.26E-01 man-rem Maximum Organ Dose (Organ) 9.15E-01 man-rem (Bone)

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Radiological Impact Page 35 of 165 Table 3-C Doses from Airborne Effluents - 3rd Quarter Individual Doses Pathway Dose Quarterly Limit Percent of Limit Location Beta Air 2.10E-06 mrad 10 mrad

< 1 N 6000 meters Gamma Air 1.94E-05 mrad 5 mrad

< 1 N 6000 meters NG Skin 2.33E-05 mrad NA NA NNW 1650 meters NG Total Body 2.23E-05 mrad NA NA NNW 1650 meters Organ Doses (Iodine, Tritium, Particulates with >8-Day half-life)

Child / Thyroid 1.38E-02 mrem 7.5 mrem

< 1 N 6200 meters Child / Total Body 1.36E-02 mrem 7.5 mrem

< 1 N 6200 meters Child / Bone 5.54E-02 mrem 7.5 mrem

< 1 N 6200 meters Population Doses Total Body Dose 2.68E-01 man-rem Maximum Organ Dose (Organ) 1.18E+00 man-rem (Bone)

Table 3-D Doses from Airborne Effluents - 4th Quarter Individual Doses Pathway Dose Quarterly Limit Percent of Limit Location Beta Air 2.54E-05 mrad 10 mrad

< 1 N 6100 meters Gamma Air 1.74E-04 mrad 5 mrad

< 1 N 6100 meters NG Skin 2.10E-04 mrad NA NA N 2440 meters NG Total Body 1.98E-04 mrad NA NA N 2440 meters Organ Doses (Iodine, Tritium, Particulates with >8-Day half-life)

Child / Thyroid 8.68E-03 mrem 7.5 mrem

< 1 N 6200 meters Child / Total Body 8.22E-03 mrem 7.5 mrem

< 1 N 6200 meters Child / Bone 3.32E-02 mrem 7.5 mrem

< 1 N 6200 meters Population Doses Total Body Dose 1.81E-01 man-rem Maximum Organ Dose (Organ) 7.88E-01 man-rem (Bone)

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Radiological Impact Page 36 of 165 Table 4-A Doses from Liquid Effluents - 1st Quarter Individual Doses Age Group Organ Dose Quarterly Limit Percent of Limit Adult Liver 2.55E-03 mrem 1.5 mrem

< 1 Child Thyroid 4.20E-04 mrem 1.5 mrem

< 1 Adult Total Body 1.60E-03 mrem 5 mrem

< 1 Average River Flow past BFN: 75,109 CFS Population Doses Total Body Dose 4.50E-02 man-rem Maximum Organ Dose (Organ) 5.20E-02 man-rem (Liver)

Table 4-B Doses from Liquid Effluents - 2nd Quarter Individual Doses Age Group Organ Dose Quarterly Limit Percent of Limit Adult Liver 1.30E-03 mrem 1.5 mrem

< 1 Child Thyroid 6.70E-04 mrem 1.5 mrem

< 1 Adult Total Body 1.01E-03 mrem 5 mrem

< 1 Average River Flow past BFN: 43,914 CFS Population Doses Total Body Dose 6.90E-02 man-rem Maximum Organ Dose (Organ) 7.10E-02 man-rem (Liver)

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Radiological Impact Page 37 of 165 Table 4-C Doses from Liquid Effluents - 3rd Quarter Individual Doses Age Group Organ Dose Quarterly Limit Percent of Limit Child Bone 5.20E-06 mrem 1.5 mrem

< 1 Child Thyroid 6.10E-07 mrem 1.5 mrem

< 1 Adult Total Body 3.50E-06 mrem 5 mrem

< 1 Average River Flow past BFN: 43,654 CFS Population Doses Total Body Dose 4.60E-05 man-rem Maximum Organ Dose (Organ) 6.20E-05 man-rem (Liver)

Table 4-D Doses from Liquid Effluents - 4th Quarter Individual Doses Age Group Organ Dose Quarterly Limit Percent of Limit Teen Liver 2.85E-05 mrem 1.5 mrem

< 1 Child Thyroid 2.82E-06 mrem 1.5 mrem

< 1 Adult Total Body 1.90E-05 mrem 5 mrem

< 1 Average River Flow past BFN: 42,903 CFS Population Doses Total Body Dose 2.40E-04 man-rem Maximum Organ Dose (Organ) 3.30E-04 man-rem (Liver)

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Radiological Impact Page 38 of 165 Table 4-E Total Dose from I-131 Water Ingestion Individual Doses 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total I-131 (Ci)

<LLD

<LLD Thyroid (mrem)

NA NA NA NA NA Population /

Thyroid (mrem)

NA NA NA NA NA The REMP requirements as specified in Table 3.12-1 from NUREG 1302, Offsite Dose Calculation Manual Guidance: Standard Radiological Effluent Controls for Boiling Water Reactors, dated April 1991, requires an I-131 specific analysis for drinking water pathway samples if the annual dose from I-131 is greater than 1 mrem. In order to evaluate the need for implementation of this additional analysis, the drinking water pathway dose from I-131 to the maximum organ and age group is calculated. Based on Table 4-E, the performance of the I-131 specific analysis is not required for BFN REMP drinking water samples in 2021, as I-131 was not identified in any liquid effluent from the plant.

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Radiological Impact Page 39 of 165 Table 5 Total Dose from Fuel Cycle Dose 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Total Body or any Organ (except thyroid)

Total body air (submersion) 0.00E+00 6.91E-06 2.23E-05 1.98E-04 Critical organ dose (airborne) 2.44E-02 4.04E-02 5.54E-02 3.32E-02 Total body dose (liquid) 1.60E-03 1.01E-03 3.50E-06 1.90E-05 Maximum organ dose (liquid) 2.55E-03 1.30E-03 5.20E-06 2.85E-05 Direct Radiation Dose 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Total 2.86E-02 4.27E-02 5.54E-02 3.34E-02 Cumulative Total Dose (mrem) 1.60E-01 Annual Dose Limit (mrem) 25 Percent of Limit

< 1%

Thyroid Total body air (submersion) 0.00E+00 6.91E-06 2.23E-05 1.98E-04 Thyroid dose (airborne) 8.79E-03 1.25E-02 1.38E-02 8.68E-03 Total body dose (liquid) 1.60E-03 1.01E-03 3.50E-06 1.90E-05 Thyroid dose (liquid) 4.20E-04 6.70E-04 6.10E-07 2.82E-06 Direct Radiation Dose 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Total 1.08E-02 1.42E-02 1.38E-02 8.90E-03 Cumulative Total Dose (mrem) 4.77E-02 Annual Dose Limit (mrem) 75 Percent of Limit

< 1%

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 40 of 165 VII. Meteorological Data Table 6-A Ground Level Releases - 1st Quarter JFD Joint Frequency Distribution In Percent

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 41 of 165 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.233 0.047 0.000 0.000 0.279 NNE 0.000 0.000 0.000 0.000 0.000 0.372 0.000 0.000 0.000 0.372 NE 0.000 0.000 0.000 0.047 0.000 0.093 0.093 0.000 0.000 0.233 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.047 ESE 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 SE 0.000 0.000 0.047 0.000 0.093 0.047 0.000 0.000 0.000 0.186 SSE 0.000 0.000 0.093 0.186 0.093 0.000 0.000 0.000 0.000 0.372 S 0.000 0.000 0.047 0.326 0.186 0.000 0.000 0.000 0.000 0.559 SSW 0.000 0.000 0.093 0.093 0.000 0.000 0.000 0.000 0.000 0.186 SW 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 WSW 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.093 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.047 NNW 0.000 0.000 0.000 0.000 0.000 0.140 0.000 0.000 0.000 0.140 SUBTOTAL 0.000 0.000 0.279 0.652 0.512 1.024 0.186 0.000 0.000 2.654 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2148 TOTAL HOURS OF STABILITY CLASS A 57 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 57 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2148 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/04/21 MEAN WIND SPEED = 7.33 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 42 of 165 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.047 0.233 0.000 0.000 0.000 0.279 NNE 0.000 0.000 0.000 0.000 0.093 0.093 0.000 0.000 0.000 0.186 NE 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.047 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 ESE 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 SE 0.000 0.000 0.047 0.093 0.093 0.093 0.000 0.000 0.000 0.326 SSE 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 S 0.000 0.000 0.000 0.140 0.047 0.000 0.000 0.000 0.000 0.186 SSW 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.093 W 0.000 0.000 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.093 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.140 0.047 0.000 0.000 0.186 NNW 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 SUBTOTAL 0.000 0.000 0.047 0.419 0.419 0.698 0.047 0.000 0.000 1.629 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2148 TOTAL HOURS OF STABILITY CLASS B 35 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 35 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2148 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/04/21 MEAN WIND SPEED = 7.42 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 43 of 165 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.093 0.233 0.000 0.000 0.000 0.326 NNE 0.000 0.000 0.000 0.140 0.186 0.186 0.000 0.000 0.000 0.512 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.047 ENE 0.000 0.000 0.000 0.000 0.047 0.093 0.000 0.000 0.000 0.140 E 0.000 0.000 0.000 0.047 0.140 0.000 0.000 0.000 0.000 0.186 ESE 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.047 SE 0.000 0.000 0.093 0.093 0.000 0.000 0.000 0.000 0.000 0.186 SSE 0.000 0.000 0.093 0.047 0.047 0.000 0.000 0.000 0.000 0.186 S 0.000 0.000 0.140 0.140 0.000 0.000 0.000 0.000 0.000 0.279 SSW 0.000 0.000 0.186 0.047 0.000 0.000 0.000 0.000 0.000 0.233 SW 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.093 WSW 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.000 0.093 W 0.000 0.000 0.000 0.047 0.047 0.233 0.000 0.000 0.000 0.326 WNW 0.000 0.000 0.000 0.047 0.093 0.279 0.140 0.000 0.000 0.559 NW 0.000 0.000 0.000 0.047 0.000 0.233 0.186 0.000 0.000 0.466 NNW 0.000 0.000 0.000 0.000 0.140 0.233 0.000 0.000 0.000 0.372 SUBTOTAL 0.000 0.000 0.559 0.791 0.791 1.536 0.372 0.000 0.000 4.050 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2148 TOTAL HOURS OF STABILITY CLASS C 87 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 87 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2148 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/04/21 MEAN WIND SPEED = 7.26 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 44 of 165 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.326 1.629 2.886 0.931 0.000 0.000 0.000 5.773 NNE 0.000 0.047 0.559 1.769 1.909 0.652 0.000 0.000 0.000 4.935 NE 0.000 0.000 0.279 1.257 0.791 0.326 0.047 0.000 0.000 2.700 ENE 0.000 0.000 0.233 0.419 0.326 0.140 0.000 0.000 0.000 1.117 E 0.000 0.000 0.140 0.419 0.279 0.093 0.000 0.000 0.000 0.931 ESE 0.000 0.000 0.279 0.512 0.652 0.326 0.000 0.000 0.000 1.769 SE 0.000 0.000 0.372 1.117 0.512 0.652 0.000 0.000 0.000 2.654 SSE 0.000 0.000 0.652 0.372 0.186 0.000 0.000 0.000 0.000 1.210 S 0.000 0.047 0.605 0.419 0.233 0.652 0.000 0.000 0.000 1.955 SSW 0.000 0.000 0.512 0.326 0.093 0.186 0.000 0.000 0.000 1.117 SW 0.000 0.000 0.512 0.279 0.000 0.047 0.047 0.000 0.000 0.885 WSW 0.000 0.000 0.512 0.279 0.279 0.372 0.000 0.000 0.000 1.443 W 0.000 0.000 0.279 0.512 0.698 2.188 0.233 0.000 0.000 3.911 WNW 0.000 0.000 0.279 0.326 0.605 0.978 0.605 0.000 0.000 2.793 NW 0.000 0.000 0.186 0.372 0.698 1.397 2.235 0.000 0.000 4.888 NNW 0.000 0.000 0.326 0.652 1.723 2.793 0.233 0.000 0.000 5.726 SUBTOTAL 0.000 0.093 6.052 10.661 11.872 11.732 3.399 0.000 0.000 43.808 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2148 TOTAL HOURS OF STABILITY CLASS D 941 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 941 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2148 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/04/21 MEAN WIND SPEED = 6.79 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.093 0.978 0.186 0.000 0.000 0.000 0.000 0.000 1.257 NNE 0.000 0.047 0.838 1.210 0.512 0.279 0.000 0.000 0.000 2.886 NE 0.000 0.140 0.419 0.466 0.372 0.326 0.000 0.000 0.000 1.723 ENE 0.000 0.000 0.186 0.186 0.140 0.047 0.000 0.000 0.000 0.559 E 0.000 0.000 0.559 0.466 0.233 0.000 0.000 0.000 0.000 1.257 ESE 0.000 0.047 0.838 0.931 0.326 0.047 0.000 0.000 0.000 2.188 SE 0.000 0.047 0.745 0.745 0.698 0.652 0.047 0.000 0.000 2.933 SSE 0.000 0.140 0.978 0.605 0.838 0.512 0.000 0.000 0.000 3.073 S 0.000 0.093 0.605 0.419 0.605 1.210 0.791 0.000 0.000 3.724 SSW 0.000 0.093 0.326 0.093 0.186 0.512 0.419 0.093 0.000 1.723 SW 0.000 0.047 0.466 0.000 0.047 0.140 0.047 0.000 0.000 0.745 WSW 0.000 0.047 0.419 0.093 0.000 0.093 0.000 0.000 0.000 0.652 W 0.000 0.140 0.419 0.931 0.186 0.093 0.000 0.000 0.000 1.769 WNW 0.000 0.000 0.233 0.140 0.233 0.279 0.000 0.000 0.000 0.885 NW 0.000 0.047 0.093 0.093 0.372 0.093 0.000 0.000 0.000 0.698 NNW 0.000 0.000 0.559 0.512 0.186 0.093 0.000 0.000 0.000 1.350 SUBTOTAL 0.000 0.978 8.659 7.076 4.935 4.376 1.304 0.093 0.000 27.421 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2148 TOTAL HOURS OF STABILITY CLASS E 589 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 589 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2148 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/04/21 MEAN WIND SPEED = 5.39 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.047 0.372 0.326 0.047 0.000 0.000 0.000 0.000 0.791 NNE 0.000 0.047 0.698 0.466 0.047 0.000 0.000 0.000 0.000 1.257 NE 0.000 0.093 0.140 0.093 0.000 0.000 0.000 0.000 0.000 0.326 ENE 0.000 0.000 0.186 0.000 0.000 0.000 0.000 0.000 0.000 0.186 E 0.000 0.093 0.978 0.140 0.000 0.000 0.000 0.000 0.000 1.210 ESE 0.000 0.093 0.978 0.372 0.047 0.000 0.000 0.000 0.000 1.490 SE 0.000 0.140 1.024 0.419 0.093 0.093 0.000 0.000 0.000 1.769 SSE 0.000 0.186 0.512 0.279 0.186 0.326 0.047 0.000 0.000 1.536 S 0.000 0.047 0.093 0.279 0.559 1.443 0.140 0.000 0.000 2.561 SSW 0.000 0.047 0.186 0.047 0.047 0.093 0.000 0.000 0.000 0.419 SW 0.000 0.000 0.140 0.093 0.047 0.000 0.000 0.000 0.000 0.279 WSW 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.093 W 0.000 0.047 0.140 0.000 0.000 0.000 0.000 0.000 0.000 0.186 WNW 0.000 0.047 0.093 0.047 0.000 0.000 0.000 0.000 0.000 0.186 NW 0.000 0.000 0.233 0.093 0.000 0.000 0.000 0.000 0.000 0.326 NNW 0.000 0.047 0.466 0.233 0.279 0.000 0.000 0.000 0.000 1.024 SUBTOTAL 0.000 0.978 6.285 2.886 1.350 1.955 0.186 0.000 0.000 13.641 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2148 TOTAL HOURS OF STABILITY CLASS F 293 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 293 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2148 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/04/21 MEAN WIND SPEED = 4.32 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 47 of 165 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.004 0.093 0.279 0.233 0.000 0.000 0.000 0.000 0.000 0.609 NNE 0.005 0.186 0.279 0.326 0.000 0.000 0.000 0.000 0.000 0.796 NE 0.004 0.140 0.279 0.000 0.000 0.000 0.000 0.000 0.000 0.423 ENE 0.004 0.233 0.186 0.000 0.000 0.000 0.000 0.000 0.000 0.423 E 0.005 0.140 0.326 0.000 0.000 0.000 0.000 0.000 0.000 0.470 ESE 0.006 0.186 0.419 0.000 0.000 0.000 0.000 0.000 0.000 0.611 SE 0.007 0.047 0.652 0.140 0.000 0.000 0.000 0.000 0.000 0.845 SSE 0.003 0.000 0.326 0.466 0.186 0.186 0.000 0.000 0.000 1.167 S 0.002 0.047 0.186 0.419 0.093 0.000 0.000 0.000 0.000 0.747 SSW 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 W 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 WNW 0.001 0.000 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.094 NW 0.001 0.093 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.141 NNW 0.003 0.093 0.186 0.047 0.000 0.000 0.000 0.000 0.000 0.329 SUBTOTAL 0.047 1.350 3.305 1.629 0.279 0.186 0.000 0.000 0.000 6.797 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2148 TOTAL HOURS OF STABILITY CLASS G 146 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 146 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2148 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/04/21 MEAN WIND SPEED = 2.84 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 48 of 165 Table 6-B Ground Level Releases - 2nd Quarter JFD Joint Frequency Distribution In Percent

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 49 of 165 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.092 0.046 0.000 0.000 0.138 NNE 0.000 0.000 0.000 0.000 0.184 0.322 0.000 0.000 0.000 0.506 NE 0.000 0.000 0.000 0.000 0.000 0.138 0.000 0.000 0.000 0.138 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.092 SE 0.000 0.000 0.000 0.138 0.368 0.230 0.000 0.000 0.000 0.736 SSE 0.000 0.000 0.046 0.460 0.230 0.414 0.000 0.000 0.000 1.150 S 0.000 0.000 0.046 0.460 0.644 0.322 0.000 0.000 0.000 1.472 SSW 0.000 0.000 0.000 0.092 0.138 0.276 0.000 0.000 0.000 0.506 SW 0.000 0.000 0.092 0.046 0.138 0.230 0.000 0.000 0.000 0.506 WSW 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 W 0.000 0.000 0.000 0.000 0.092 0.276 0.138 0.000 0.000 0.506 WNW 0.000 0.000 0.000 0.000 0.046 0.046 0.046 0.000 0.000 0.138 NW 0.000 0.000 0.000 0.000 0.000 0.138 0.138 0.046 0.000 0.322 NNW 0.000 0.000 0.000 0.000 0.000 0.368 0.322 0.000 0.000 0.690 SUBTOTAL 0.000 0.000 0.184 1.288 1.886 2.852 0.690 0.046 0.000 6.946 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS A 151 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 151 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/07/20 MEAN WIND SPEED = 8.01 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.046 0.092 0.138 0.000 0.000 0.000 0.276 NNE 0.000 0.000 0.000 0.000 0.184 0.092 0.000 0.000 0.000 0.276 NE 0.000 0.000 0.000 0.000 0.184 0.092 0.000 0.000 0.000 0.276 ENE 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 SE 0.000 0.000 0.000 0.138 0.460 0.276 0.046 0.000 0.000 0.920 SSE 0.000 0.000 0.046 0.414 0.046 0.046 0.000 0.000 0.000 0.552 S 0.000 0.000 0.092 0.506 0.230 0.276 0.000 0.000 0.000 1.104 SSW 0.000 0.000 0.000 0.184 0.368 0.138 0.046 0.000 0.000 0.736 SW 0.000 0.000 0.000 0.230 0.046 0.000 0.000 0.000 0.000 0.276 WSW 0.000 0.000 0.000 0.138 0.322 0.046 0.000 0.000 0.000 0.506 W 0.000 0.000 0.000 0.138 0.000 0.276 0.046 0.000 0.000 0.460 WNW 0.000 0.000 0.000 0.000 0.092 0.230 0.092 0.000 0.000 0.414 NW 0.000 0.000 0.000 0.000 0.046 0.460 0.046 0.000 0.000 0.552 NNW 0.000 0.000 0.000 0.046 0.184 0.506 0.000 0.000 0.000 0.736 SUBTOTAL 0.000 0.000 0.138 1.840 2.300 2.622 0.276 0.000 0.000 7.176 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS B 156 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 156 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/07/20 MEAN WIND SPEED = 7.29 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 51 of 165 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.092 NNE 0.000 0.000 0.000 0.046 0.138 0.046 0.000 0.000 0.000 0.230 NE 0.000 0.000 0.000 0.000 0.000 0.138 0.000 0.000 0.000 0.138 ENE 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 E 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.092 ESE 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 SE 0.000 0.000 0.000 0.414 0.276 0.138 0.000 0.000 0.000 0.828 SSE 0.000 0.000 0.230 0.276 0.138 0.046 0.000 0.000 0.000 0.690 S 0.000 0.000 0.092 0.276 0.276 0.276 0.000 0.000 0.000 0.920 SSW 0.000 0.000 0.000 0.322 0.046 0.046 0.046 0.000 0.000 0.460 SW 0.000 0.000 0.046 0.368 0.092 0.184 0.000 0.000 0.000 0.690 WSW 0.000 0.000 0.000 0.092 0.368 0.092 0.000 0.000 0.000 0.552 W 0.000 0.000 0.000 0.046 0.092 0.276 0.046 0.000 0.000 0.460 WNW 0.000 0.000 0.000 0.046 0.414 0.598 0.046 0.000 0.000 1.104 NW 0.000 0.000 0.000 0.046 0.046 0.368 0.000 0.000 0.000 0.460 NNW 0.000 0.000 0.000 0.046 0.276 0.230 0.046 0.000 0.000 0.598 SUBTOTAL 0.000 0.000 0.368 2.116 2.300 2.438 0.184 0.000 0.000 7.406 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS C 161 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 161 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/07/20 MEAN WIND SPEED = 6.76 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.276 0.368 0.368 0.138 0.000 0.000 0.000 1.150 NNE 0.000 0.000 0.276 0.506 0.598 0.230 0.000 0.000 0.000 1.610 NE 0.000 0.000 0.046 0.138 0.184 0.138 0.000 0.000 0.000 0.506 ENE 0.000 0.000 0.230 0.092 0.092 0.000 0.000 0.000 0.000 0.414 E 0.000 0.046 0.092 0.184 0.092 0.000 0.000 0.000 0.000 0.414 ESE 0.000 0.000 0.092 0.644 0.414 0.046 0.000 0.000 0.000 1.196 SE 0.000 0.046 0.828 1.840 0.920 1.196 0.000 0.000 0.000 4.830 SSE 0.000 0.000 0.920 1.380 0.644 0.552 0.092 0.000 0.000 3.588 S 0.000 0.000 0.690 1.748 1.472 1.426 0.552 0.000 0.000 5.888 SSW 0.000 0.000 0.460 0.874 0.874 1.794 0.322 0.000 0.000 4.324 SW 0.000 0.000 0.644 0.874 0.506 0.644 0.138 0.000 0.000 2.806 WSW 0.000 0.000 0.506 1.012 0.598 0.230 0.000 0.000 0.000 2.346 W 0.000 0.000 0.230 0.644 0.920 0.782 0.046 0.000 0.000 2.622 WNW 0.000 0.000 0.000 0.230 0.874 1.012 0.184 0.046 0.000 2.346 NW 0.000 0.000 0.138 0.414 0.368 0.966 0.322 0.092 0.000 2.300 NNW 0.000 0.000 0.230 0.184 0.736 0.874 0.046 0.000 0.000 2.070 SUBTOTAL 0.000 0.092 5.658 11.132 9.660 10.028 1.702 0.138 0.000 38.408 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS D 835 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 835 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/07/20 MEAN WIND SPEED = 6.45 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 53 of 165 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.460 0.138 0.184 0.000 0.000 0.000 0.000 0.782 NNE 0.000 0.046 0.276 0.276 0.092 0.000 0.000 0.000 0.000 0.690 NE 0.000 0.000 0.092 0.138 0.230 0.138 0.000 0.000 0.000 0.598 ENE 0.000 0.046 0.276 0.092 0.046 0.000 0.000 0.000 0.000 0.460 E 0.000 0.046 0.322 0.230 0.046 0.000 0.000 0.000 0.000 0.644 ESE 0.000 0.046 0.322 0.874 0.644 0.000 0.000 0.000 0.000 1.886 SE 0.000 0.184 0.598 0.460 0.690 0.184 0.000 0.000 0.000 2.116 SSE 0.000 0.046 0.598 0.460 0.184 0.092 0.000 0.000 0.000 1.380 S 0.000 0.046 0.552 0.644 0.828 1.196 0.322 0.000 0.000 3.588 SSW 0.000 0.046 0.368 0.322 0.506 0.368 0.552 0.000 0.000 2.162 SW 0.000 0.046 0.322 0.184 0.184 0.092 0.138 0.000 0.000 0.966 WSW 0.000 0.000 0.322 0.184 0.092 0.092 0.000 0.000 0.000 0.690 W 0.000 0.092 0.368 0.230 0.230 0.276 0.000 0.000 0.000 1.196 WNW 0.000 0.092 0.000 0.138 0.138 0.092 0.000 0.000 0.000 0.460 NW 0.000 0.046 0.322 0.368 0.184 0.276 0.000 0.000 0.000 1.196 NNW 0.000 0.000 0.414 0.460 0.322 0.138 0.000 0.000 0.000 1.334 SUBTOTAL 0.000 0.782 5.612 5.198 4.600 2.944 1.012 0.000 0.000 20.147 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS E 438 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 438 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/07/20 MEAN WIND SPEED = 5.41 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 1.150 0.644 0.046 0.000 0.000 0.000 0.000 1.840 NNE 0.000 0.092 0.276 0.322 0.184 0.000 0.000 0.000 0.000 0.874 NE 0.000 0.000 0.322 0.138 0.092 0.000 0.000 0.000 0.000 0.552 ENE 0.000 0.138 0.184 0.322 0.046 0.000 0.000 0.000 0.000 0.690 E 0.000 0.092 1.012 0.230 0.000 0.000 0.000 0.000 0.000 1.334 ESE 0.000 0.000 0.276 0.138 0.000 0.000 0.000 0.000 0.000 0.414 SE 0.000 0.000 0.368 0.046 0.000 0.000 0.000 0.000 0.000 0.414 SSE 0.000 0.138 0.368 0.276 0.000 0.092 0.000 0.000 0.000 0.874 S 0.000 0.000 0.276 0.414 0.506 0.138 0.000 0.000 0.000 1.334 SSW 0.000 0.000 0.046 0.046 0.046 0.000 0.000 0.000 0.000 0.138 SW 0.000 0.000 0.138 0.046 0.000 0.000 0.000 0.000 0.000 0.184 WSW 0.000 0.046 0.138 0.000 0.000 0.000 0.000 0.000 0.000 0.184 W 0.000 0.046 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.138 WNW 0.000 0.000 0.046 0.092 0.184 0.092 0.000 0.000 0.000 0.414 NW 0.000 0.046 0.184 0.046 0.092 0.000 0.000 0.000 0.000 0.368 NNW 0.000 0.092 0.552 0.460 0.046 0.046 0.000 0.000 0.000 1.196 SUBTOTAL 0.000 0.690 5.382 3.266 1.242 0.368 0.000 0.000 0.000 10.948 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS F 238 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 238 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/07/20 MEAN WIND SPEED = 3.58 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.276 1.426 0.644 0.046 0.000 0.000 0.000 0.000 2.392 NNE 0.000 0.368 0.506 0.000 0.046 0.000 0.000 0.000 0.000 0.920 NE 0.000 0.046 0.552 0.046 0.000 0.000 0.000 0.000 0.000 0.644 ENE 0.000 0.276 0.276 0.092 0.000 0.046 0.000 0.000 0.000 0.690 E 0.000 0.138 0.184 0.000 0.000 0.000 0.000 0.000 0.000 0.322 ESE 0.000 0.092 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.138 SE 0.000 0.276 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.322 SSE 0.000 0.092 0.368 0.184 0.000 0.000 0.000 0.000 0.000 0.644 S 0.000 0.046 0.230 0.000 0.046 0.000 0.000 0.000 0.000 0.322 SSW 0.000 0.000 0.000 0.000 0.138 0.000 0.000 0.000 0.000 0.138 SW 0.000 0.000 0.046 0.092 0.046 0.000 0.000 0.000 0.000 0.184 WSW 0.000 0.000 0.046 0.046 0.092 0.000 0.000 0.000 0.000 0.184 W 0.000 0.046 0.000 0.046 0.092 0.000 0.000 0.000 0.000 0.184 WNW 0.000 0.000 0.092 0.230 0.092 0.046 0.000 0.000 0.000 0.460 NW 0.000 0.276 0.184 0.092 0.092 0.000 0.000 0.000 0.000 0.644 NNW 0.000 0.230 0.460 0.046 0.046 0.000 0.000 0.000 0.000 0.782 SUBTOTAL 0.000 2.162 4.462 1.518 0.736 0.092 0.000 0.000 0.000 8.970 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS G 195 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 195 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/07/20 MEAN WIND SPEED = 2.74 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 56 of 165 Table 6-C Ground Level Releases - 3rd Quarter JFD Joint Frequency Distribution In Percent

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.318 0.455 0.000 0.000 0.000 0.773 NNE 0.000 0.000 0.000 0.000 0.227 0.318 0.000 0.000 0.000 0.545 NE 0.000 0.000 0.000 0.000 0.227 0.091 0.000 0.000 0.000 0.318 ENE 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.045 E 0.000 0.000 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.091 ESE 0.000 0.000 0.045 0.136 0.045 0.000 0.000 0.000 0.000 0.227 SE 0.000 0.000 0.091 0.773 1.091 0.273 0.000 0.000 0.000 2.227 SSE 0.000 0.000 0.273 0.500 0.182 0.045 0.000 0.000 0.000 1.000 S 0.000 0.000 0.273 1.409 0.227 0.091 0.000 0.000 0.000 2.000 SSW 0.000 0.000 0.136 0.773 0.091 0.000 0.000 0.000 0.000 1.000 SW 0.000 0.000 0.045 0.955 0.227 0.091 0.000 0.000 0.000 1.318 WSW 0.000 0.000 0.045 0.227 0.045 0.000 0.000 0.000 0.000 0.318 W 0.000 0.000 0.091 0.318 0.364 0.091 0.000 0.000 0.000 0.864 WNW 0.000 0.000 0.000 0.045 0.318 0.318 0.000 0.000 0.000 0.682 NW 0.000 0.000 0.045 0.045 0.091 0.500 0.227 0.000 0.000 0.909 NNW 0.000 0.000 0.000 0.000 0.045 0.455 0.000 0.000 0.000 0.500 SUBTOTAL 0.000 0.000 1.045 5.273 3.545 2.727 0.227 0.000 0.000 12.818 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS A 282 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 282 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/10/14 MEAN WIND SPEED = 6.00 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.045 0.182 0.045 0.000 0.000 0.000 0.273 NNE 0.000 0.000 0.000 0.136 0.273 0.091 0.000 0.000 0.000 0.500 NE 0.000 0.000 0.000 0.136 0.000 0.136 0.000 0.000 0.000 0.273 ENE 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.091 E 0.000 0.000 0.045 0.000 0.000 0.045 0.000 0.000 0.000 0.091 ESE 0.000 0.000 0.000 0.136 0.227 0.000 0.000 0.000 0.000 0.364 SE 0.000 0.000 0.045 1.000 0.136 0.045 0.000 0.000 0.000 1.227 SSE 0.000 0.000 0.500 0.182 0.000 0.000 0.000 0.000 0.000 0.682 S 0.000 0.000 0.409 0.636 0.318 0.000 0.091 0.000 0.000 1.455 SSW 0.000 0.000 0.091 0.273 0.000 0.045 0.000 0.000 0.000 0.409 SW 0.000 0.000 0.182 0.545 0.000 0.000 0.000 0.000 0.000 0.727 WSW 0.000 0.000 0.136 0.409 0.045 0.000 0.000 0.000 0.000 0.591 W 0.000 0.000 0.045 0.318 0.000 0.045 0.000 0.000 0.000 0.409 WNW 0.000 0.000 0.000 0.045 0.227 0.136 0.045 0.000 0.000 0.455 NW 0.000 0.000 0.045 0.182 0.136 0.045 0.000 0.045 0.000 0.455 NNW 0.000 0.000 0.000 0.045 0.091 0.136 0.000 0.000 0.000 0.273 SUBTOTAL 0.000 0.000 1.591 4.091 1.636 0.773 0.136 0.045 0.000 8.273 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS B 182 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 182 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/10/14 MEAN WIND SPEED = 5.15 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.136 0.136 0.045 0.000 0.000 0.000 0.318 NNE 0.000 0.000 0.045 0.227 0.227 0.000 0.000 0.000 0.000 0.500 NE 0.000 0.000 0.000 0.136 0.182 0.091 0.000 0.000 0.000 0.409 ENE 0.000 0.000 0.000 0.091 0.000 0.091 0.091 0.000 0.000 0.273 E 0.000 0.000 0.227 0.227 0.000 0.000 0.000 0.000 0.000 0.455 ESE 0.000 0.000 0.045 0.091 0.136 0.000 0.045 0.000 0.000 0.318 SE 0.000 0.000 0.182 0.773 0.136 0.000 0.000 0.000 0.000 1.091 SSE 0.000 0.000 0.227 0.318 0.045 0.000 0.000 0.000 0.000 0.591 S 0.000 0.000 0.545 0.545 0.227 0.136 0.000 0.000 0.000 1.455 SSW 0.000 0.000 0.273 0.227 0.091 0.091 0.000 0.000 0.000 0.682 SW 0.000 0.000 0.227 0.136 0.000 0.000 0.000 0.000 0.000 0.364 WSW 0.000 0.000 0.273 0.409 0.136 0.000 0.000 0.000 0.000 0.818 W 0.000 0.000 0.091 0.136 0.000 0.045 0.000 0.000 0.000 0.273 WNW 0.000 0.000 0.000 0.045 0.000 0.091 0.000 0.000 0.000 0.136 NW 0.000 0.000 0.000 0.000 0.000 0.136 0.000 0.000 0.000 0.136 NNW 0.000 0.000 0.000 0.091 0.000 0.045 0.000 0.000 0.000 0.136 SUBTOTAL 0.000 0.000 2.136 3.591 1.318 0.773 0.136 0.000 0.000 7.955 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS C 175 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 175 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/10/14 MEAN WIND SPEED = 4.87 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.318 0.636 0.227 0.045 0.000 0.000 0.000 1.227 NNE 0.000 0.045 0.455 0.955 0.273 0.091 0.000 0.000 0.000 1.818 NE 0.000 0.045 0.409 0.636 0.182 0.045 0.000 0.000 0.000 1.318 ENE 0.000 0.000 0.409 0.409 0.045 0.000 0.045 0.000 0.000 0.909 E 0.000 0.000 0.273 0.636 0.182 0.091 0.045 0.000 0.000 1.227 ESE 0.000 0.000 0.500 1.364 0.682 0.136 0.000 0.000 0.000 2.682 SE 0.000 0.000 1.182 1.273 0.455 0.045 0.000 0.000 0.000 2.955 SSE 0.000 0.000 1.227 0.545 0.136 0.000 0.000 0.000 0.000 1.909 S 0.000 0.045 1.318 2.364 1.182 1.727 0.000 0.000 0.000 6.636 SSW 0.000 0.000 1.045 1.500 0.818 0.591 0.000 0.000 0.000 3.955 SW 0.000 0.000 0.727 0.818 0.273 0.091 0.000 0.000 0.000 1.909 WSW 0.000 0.000 0.864 0.955 0.091 0.045 0.000 0.000 0.000 1.955 W 0.000 0.000 0.318 1.000 0.455 0.045 0.000 0.000 0.000 1.818 WNW 0.000 0.000 0.000 0.045 0.091 0.409 0.182 0.000 0.000 0.727 NW 0.000 0.000 0.136 0.091 0.045 0.136 0.273 0.000 0.000 0.682 NNW 0.000 0.000 0.136 0.227 0.318 0.136 0.091 0.000 0.000 0.909 SUBTOTAL 0.000 0.136 9.318 13.455 5.455 3.636 0.636 0.000 0.000 32.636 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS D 718 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 718 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/10/14 MEAN WIND SPEED = 4.94 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.136 1.455 0.591 0.227 0.000 0.000 0.000 0.000 2.409 NNE 0.000 0.045 1.045 0.773 0.136 0.000 0.000 0.000 0.000 2.000 NE 0.000 0.182 0.364 0.318 0.091 0.000 0.000 0.000 0.000 0.955 ENE 0.000 0.000 0.636 0.864 0.045 0.000 0.000 0.000 0.000 1.545 E 0.000 0.045 1.409 1.727 0.091 0.000 0.000 0.000 0.000 3.273 ESE 0.000 0.091 1.136 0.591 0.091 0.000 0.000 0.000 0.000 1.909 SE 0.000 0.136 0.909 0.000 0.000 0.000 0.000 0.000 0.000 1.045 SSE 0.000 0.136 1.182 0.227 0.000 0.000 0.000 0.000 0.000 1.545 S 0.000 0.045 0.864 0.545 0.364 0.000 0.000 0.000 0.000 1.818 SSW 0.000 0.000 0.545 0.045 0.045 0.000 0.000 0.000 0.000 0.636 SW 0.000 0.000 0.409 0.045 0.045 0.000 0.000 0.000 0.000 0.500 WSW 0.000 0.045 0.091 0.000 0.045 0.000 0.000 0.000 0.000 0.182 W 0.000 0.000 0.364 0.136 0.045 0.000 0.000 0.000 0.000 0.545 WNW 0.000 0.045 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.182 NW 0.000 0.045 0.273 0.136 0.136 0.000 0.000 0.000 0.000 0.591 NNW 0.000 0.091 0.409 0.364 0.182 0.136 0.045 0.000 0.000 1.227 SUBTOTAL 0.000 1.045 11.227 6.364 1.545 0.136 0.045 0.000 0.000 20.364 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS E 448 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 448 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/10/14 MEAN WIND SPEED = 3.26 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.017 0.136 1.318 0.727 0.000 0.000 0.000 0.000 0.000 2.199 NNE 0.013 0.182 0.955 0.545 0.000 0.000 0.000 0.000 0.000 1.695 NE 0.011 0.182 0.773 0.045 0.000 0.000 0.000 0.000 0.000 1.011 ENE 0.008 0.182 0.545 0.364 0.000 0.000 0.000 0.000 0.000 1.099 E 0.012 0.182 0.864 0.591 0.000 0.000 0.000 0.000 0.000 1.649 ESE 0.005 0.136 0.318 0.136 0.000 0.000 0.000 0.000 0.000 0.596 SE 0.005 0.227 0.227 0.000 0.000 0.000 0.000 0.000 0.000 0.460 SSE 0.003 0.182 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.230 S 0.002 0.045 0.136 0.045 0.000 0.000 0.000 0.000 0.000 0.229 SSW 0.002 0.091 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.138 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.001 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.046 W 0.001 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.046 WNW 0.001 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.092 NW 0.003 0.182 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.276 NNW 0.007 0.045 0.545 0.136 0.000 0.000 0.000 0.000 0.000 0.734 SUBTOTAL 0.091 1.818 6.000 2.591 0.000 0.000 0.000 0.000 0.000 10.500 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS F 231 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 231 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 2 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/10/14 MEAN WIND SPEED = 2.58 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.091 1.545 1.045 0.045 0.000 0.000 0.000 0.000 2.727 NNE 0.000 0.136 1.318 0.500 0.000 0.000 0.000 0.000 0.000 1.955 NE 0.000 0.318 0.727 0.136 0.000 0.000 0.000 0.000 0.000 1.182 ENE 0.000 0.136 0.591 0.182 0.000 0.000 0.000 0.000 0.000 0.909 E 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.091 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.045 SSE 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 S 0.000 0.091 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.136 SSW 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.318 0.000 0.000 0.000 0.000 0.000 0.000 0.318 SUBTOTAL 0.000 0.818 4.727 1.864 0.045 0.000 0.000 0.000 0.000 7.455 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS G 164 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 164 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2200 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2021/10/14 MEAN WIND SPEED = 2.70 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 64 of 165 Table 6-D Ground Level Releases - 4th Quarter JFD Joint Frequency Distribution In Percent

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 65 of 165 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.046 0.319 0.046 0.000 0.000 0.411 NNE 0.000 0.000 0.000 0.000 0.046 0.091 0.000 0.000 0.000 0.137 NE 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 SE 0.000 0.000 0.000 0.182 0.182 0.046 0.000 0.000 0.000 0.411 SSE 0.000 0.000 0.000 0.365 0.000 0.046 0.000 0.000 0.000 0.411 S 0.000 0.000 0.000 0.456 0.182 0.274 0.000 0.000 0.000 0.912 SSW 0.000 0.000 0.000 0.137 0.228 0.046 0.000 0.000 0.000 0.411 SW 0.000 0.000 0.000 0.091 0.046 0.046 0.000 0.000 0.000 0.182 WSW 0.000 0.000 0.046 0.000 0.000 0.046 0.000 0.000 0.000 0.091 W 0.000 0.000 0.046 0.000 0.137 0.182 0.000 0.000 0.000 0.365 WNW 0.000 0.000 0.000 0.000 0.000 0.274 0.000 0.000 0.000 0.274 NW 0.000 0.000 0.046 0.046 0.046 0.091 0.000 0.000 0.000 0.228 NNW 0.000 0.000 0.000 0.091 0.182 0.456 0.228 0.000 0.000 0.958 SUBTOTAL 0.000 0.000 0.137 1.414 1.095 1.962 0.274 0.000 0.000 4.881 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2192 TOTAL HOURS OF STABILITY CLASS A 107 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 107 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2192 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2022/01/26 MEAN WIND SPEED = 7.32 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.274 0.000 0.000 0.000 0.274 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.091 0.091 0.000 0.000 0.000 0.000 0.182 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.319 0.091 0.046 0.000 0.000 0.000 0.456 SSE 0.000 0.000 0.046 0.228 0.046 0.000 0.000 0.000 0.000 0.319 S 0.000 0.000 0.000 0.182 0.000 0.046 0.000 0.000 0.000 0.228 SSW 0.000 0.000 0.046 0.182 0.000 0.000 0.000 0.000 0.000 0.228 SW 0.000 0.000 0.000 0.137 0.000 0.000 0.000 0.000 0.000 0.137 WSW 0.000 0.000 0.000 0.091 0.000 0.046 0.000 0.000 0.000 0.137 W 0.000 0.000 0.000 0.046 0.182 0.091 0.000 0.000 0.000 0.319 WNW 0.000 0.000 0.000 0.091 0.046 0.182 0.000 0.000 0.000 0.319 NW 0.000 0.000 0.000 0.046 0.182 0.182 0.000 0.000 0.000 0.411 NNW 0.000 0.000 0.000 0.046 0.046 0.182 0.000 0.000 0.000 0.274 SUBTOTAL 0.000 0.000 0.091 1.505 0.684 1.049 0.000 0.000 0.000 3.330 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2192 TOTAL HOURS OF STABILITY CLASS B 73 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 73 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2192 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2022/01/26 MEAN WIND SPEED = 6.27 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.091 0.274 0.000 0.000 0.000 0.365 NNE 0.000 0.000 0.000 0.091 0.091 0.000 0.000 0.000 0.000 0.182 NE 0.000 0.000 0.000 0.046 0.000 0.046 0.000 0.000 0.000 0.091 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.091 SE 0.000 0.000 0.182 0.456 0.182 0.046 0.000 0.000 0.000 0.867 SSE 0.000 0.000 0.046 0.046 0.046 0.000 0.000 0.000 0.000 0.137 S 0.000 0.000 0.046 0.000 0.137 0.274 0.000 0.000 0.000 0.456 SSW 0.000 0.000 0.091 0.182 0.046 0.046 0.000 0.000 0.000 0.365 SW 0.000 0.000 0.137 0.091 0.046 0.046 0.000 0.000 0.000 0.319 WSW 0.000 0.000 0.000 0.182 0.000 0.000 0.000 0.000 0.000 0.182 W 0.000 0.000 0.000 0.137 0.091 0.182 0.000 0.000 0.000 0.411 WNW 0.000 0.000 0.046 0.137 0.000 0.091 0.046 0.000 0.000 0.319 NW 0.000 0.000 0.000 0.091 0.182 0.046 0.046 0.000 0.000 0.365 NNW 0.000 0.000 0.000 0.000 0.137 0.182 0.000 0.000 0.000 0.319 SUBTOTAL 0.000 0.000 0.547 1.460 1.141 1.232 0.091 0.000 0.000 4.471 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2192 TOTAL HOURS OF STABILITY CLASS C 98 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 98 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2192 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2022/01/26 MEAN WIND SPEED = 6.31 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 68 of 165 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.182 0.319 0.228 0.867 0.000 0.000 0.000 1.597 NNE 0.000 0.000 0.137 0.502 0.639 0.274 0.000 0.000 0.000 1.551 NE 0.000 0.000 0.411 0.319 0.411 0.046 0.000 0.000 0.000 1.186 ENE 0.000 0.000 0.091 0.365 0.182 0.000 0.000 0.000 0.000 0.639 E 0.000 0.046 0.091 0.502 0.000 0.000 0.000 0.000 0.000 0.639 ESE 0.000 0.000 0.411 0.776 0.137 0.000 0.000 0.000 0.000 1.323 SE 0.000 0.000 0.776 1.505 0.547 0.456 0.091 0.000 0.000 3.376 SSE 0.000 0.000 1.049 0.776 0.456 0.091 0.000 0.000 0.000 2.372 S 0.000 0.091 0.684 1.049 0.684 1.779 0.137 0.000 0.000 4.425 SSW 0.000 0.000 0.228 0.274 0.365 1.049 0.228 0.000 0.000 2.144 SW 0.000 0.000 0.319 0.319 0.365 0.228 0.000 0.000 0.000 1.232 WSW 0.000 0.000 0.137 0.228 0.228 0.091 0.000 0.000 0.000 0.684 W 0.000 0.000 0.091 0.502 0.365 0.593 0.046 0.000 0.000 1.597 WNW 0.000 0.000 0.046 0.000 0.502 0.776 0.274 0.000 0.000 1.597 NW 0.000 0.000 0.091 0.228 0.684 0.639 0.502 0.000 0.000 2.144 NNW 0.000 0.000 0.046 0.319 0.182 1.004 0.228 0.000 0.000 1.779 SUBTOTAL 0.000 0.137 4.790 7.984 5.976 7.892 1.505 0.000 0.000 28.285 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2192 TOTAL HOURS OF STABILITY CLASS D 620 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 620 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2192 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2022/01/26 MEAN WIND SPEED = 6.47 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.046 0.639 0.547 0.365 0.046 0.000 0.000 0.000 1.642 NNE 0.000 0.000 0.547 0.958 0.228 0.000 0.000 0.000 0.000 1.734 NE 0.000 0.046 0.456 0.319 0.274 0.137 0.000 0.000 0.000 1.232 ENE 0.000 0.182 0.182 0.502 0.000 0.000 0.000 0.000 0.000 0.867 E 0.000 0.091 0.456 0.365 0.000 0.000 0.000 0.000 0.000 0.912 ESE 0.000 0.000 1.551 1.323 0.411 0.091 0.000 0.000 0.000 3.376 SE 0.000 0.091 1.186 0.867 0.776 0.319 0.000 0.000 0.000 3.239 SSE 0.000 0.091 1.323 1.049 1.277 0.821 0.000 0.000 0.000 4.562 S 0.000 0.137 0.365 0.912 0.776 2.281 0.867 0.182 0.000 5.520 SSW 0.000 0.091 0.319 0.228 0.593 1.962 0.456 0.000 0.000 3.650 SW 0.000 0.091 0.319 0.091 0.000 0.547 0.091 0.000 0.000 1.141 WSW 0.000 0.000 0.137 0.091 0.091 0.000 0.000 0.000 0.000 0.319 W 0.000 0.000 0.319 0.593 0.137 0.091 0.000 0.000 0.000 1.141 WNW 0.000 0.046 0.091 0.046 0.137 0.046 0.000 0.000 0.000 0.365 NW 0.000 0.046 0.502 0.274 0.182 0.456 0.046 0.000 0.000 1.505 NNW 0.000 0.000 0.365 0.365 0.593 0.274 0.046 0.000 0.000 1.642 SUBTOTAL 0.000 0.958 8.759 8.531 5.839 7.071 1.505 0.182 0.000 32.847 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2192 TOTAL HOURS OF STABILITY CLASS E 720 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 720 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2192 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2022/01/26 MEAN WIND SPEED = 5.77 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.046 1.232 0.821 0.137 0.000 0.000 0.000 0.000 2.235 NNE 0.000 0.046 0.228 0.593 0.137 0.000 0.000 0.000 0.000 1.004 NE 0.000 0.228 0.319 0.046 0.046 0.000 0.000 0.000 0.000 0.639 ENE 0.000 0.046 0.776 0.091 0.000 0.000 0.000 0.000 0.000 0.912 E 0.000 0.228 0.912 0.502 0.000 0.000 0.000 0.000 0.000 1.642 ESE 0.000 0.182 0.684 0.547 0.046 0.000 0.000 0.000 0.000 1.460 SE 0.000 0.274 1.369 0.502 0.091 0.091 0.000 0.000 0.000 2.327 SSE 0.000 0.091 0.684 0.411 0.365 0.228 0.000 0.000 0.000 1.779 S 0.000 0.137 0.319 0.319 0.411 0.684 0.182 0.000 0.000 2.053 SSW 0.000 0.046 0.228 0.182 0.000 0.046 0.000 0.000 0.000 0.502 SW 0.000 0.046 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.137 WSW 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 W 0.000 0.091 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.137 WNW 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.091 NW 0.000 0.000 0.091 0.182 0.046 0.000 0.000 0.000 0.000 0.319 NNW 0.000 0.046 0.365 0.639 0.274 0.000 0.000 0.000 0.000 1.323 SUBTOTAL 0.000 1.551 7.436 4.836 1.551 1.049 0.182 0.000 0.000 16.606 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2192 TOTAL HOURS OF STABILITY CLASS F 364 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 364 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2192 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2022/01/26 MEAN WIND SPEED = 3.78 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.011 0.274 1.414 1.277 0.000 0.000 0.000 0.000 0.000 2.976 NNE 0.006 0.182 0.684 0.411 0.000 0.000 0.000 0.000 0.000 1.283 NE 0.006 0.000 0.958 0.000 0.000 0.000 0.000 0.000 0.000 0.964 ENE 0.007 0.274 0.730 0.091 0.000 0.000 0.000 0.000 0.000 1.101 E 0.005 0.046 0.776 0.046 0.000 0.000 0.000 0.000 0.000 0.872 ESE 0.002 0.046 0.228 0.000 0.000 0.000 0.000 0.000 0.000 0.276 SE 0.003 0.091 0.319 0.182 0.000 0.000 0.000 0.000 0.000 0.596 SSE 0.002 0.046 0.319 0.137 0.091 0.000 0.000 0.000 0.000 0.595 S 0.000 0.000 0.046 0.000 0.046 0.000 0.000 0.000 0.000 0.092 SSW 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 NW 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 NNW 0.003 0.228 0.182 0.274 0.000 0.000 0.000 0.000 0.000 0.687 SUBTOTAL 0.046 1.277 5.703 2.418 0.137 0.000 0.000 0.000 0.000 9.580 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2192 TOTAL HOURS OF STABILITY CLASS G 210 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 210 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2192 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.50 METER LEVEL DATE PRINTED: 2022/01/26 MEAN WIND SPEED = 2.72 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 72 of 165 Table 7-A Split Level Releases - 1st Quarter JFD Joint Frequency Distribution In Percent (Ground Level Release Mode and Elevated Release Mode)

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 73 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.038 0.032 0.000 0.000 0.070 NNE 0.000 0.000 0.000 0.000 0.000 0.066 0.000 0.000 0.000 0.066 NE 0.000 0.000 0.000 0.000 0.000 0.015 0.019 0.000 0.000 0.034 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.007 0.000 0.000 0.000 0.007 ESE 0.000 0.000 0.000 0.000 0.007 0.000 0.000 0.000 0.000 0.007 SE 0.000 0.000 0.000 0.000 0.010 0.010 0.000 0.000 0.000 0.019 SSE 0.000 0.000 0.006 0.008 0.013 0.000 0.000 0.000 0.000 0.027 S 0.000 0.000 0.000 0.041 0.003 0.000 0.000 0.000 0.000 0.044 SSW 0.000 0.000 0.009 0.013 0.000 0.000 0.000 0.000 0.000 0.022 SW 0.000 0.000 0.000 0.000 0.008 0.000 0.000 0.000 0.000 0.008 WSW 0.000 0.000 0.000 0.000 0.007 0.000 0.000 0.000 0.000 0.007 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.015 0.000 0.000 0.000 0.015 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.024 0.000 0.000 0.000 0.024 SUBTOTAL 0.000 0.000 0.015 0.063 0.048 0.176 0.051 0.000 0.000 0.353 TOTAL HOURS OF VALID OBSERVATIONS 2076.000 TOTAL HOURS OF GROUND LEVEL RELEASE 258.740 TOTAL HOURS OF STABILITY CLASS A 9.100 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS A 7.320 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2021/04/21

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 74 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.007 0.040 0.000 0.000 0.000 0.047 NNE 0.000 0.000 0.000 0.000 0.011 0.016 0.000 0.000 0.000 0.027 NE 0.000 0.000 0.000 0.000 0.000 0.006 0.000 0.000 0.000 0.006 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.003 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.005 0.000 0.015 0.018 0.000 0.000 0.000 0.039 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.008 0.007 0.000 0.000 0.000 0.000 0.015 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.013 0.000 0.000 0.000 0.000 0.013 W 0.000 0.000 0.000 0.000 0.000 0.016 0.000 0.000 0.000 0.016 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.025 0.000 0.000 0.000 0.025 NNW 0.000 0.000 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.005 SUBTOTAL 0.000 0.000 0.005 0.011 0.058 0.121 0.000 0.000 0.000 0.196 TOTAL HOURS OF VALID OBSERVATIONS 2076.000 TOTAL HOURS OF GROUND LEVEL RELEASE 258.740 TOTAL HOURS OF STABILITY CLASS B 12.770 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS B 4.060 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2021/04/21

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 75 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.012 0.039 0.000 0.000 0.000 0.052 NNE 0.000 0.000 0.000 0.005 0.013 0.030 0.000 0.000 0.000 0.049 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.010 0.000 0.000 0.010 ENE 0.000 0.000 0.000 0.000 0.002 0.012 0.000 0.000 0.000 0.013 E 0.000 0.000 0.000 0.000 0.006 0.000 0.000 0.000 0.000 0.006 ESE 0.000 0.000 0.000 0.000 0.000 0.009 0.000 0.000 0.000 0.009 SE 0.000 0.000 0.014 0.000 0.000 0.000 0.000 0.000 0.000 0.014 SSE 0.000 0.000 0.000 0.000 0.013 0.000 0.000 0.000 0.000 0.013 S 0.000 0.000 0.004 0.016 0.000 0.000 0.000 0.000 0.000 0.020 SSW 0.000 0.000 0.008 0.000 0.000 0.000 0.000 0.000 0.000 0.008 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.001 0.035 0.000 0.000 0.000 0.037 WNW 0.000 0.000 0.000 0.000 0.005 0.040 0.026 0.000 0.000 0.071 NW 0.000 0.000 0.000 0.000 0.000 0.035 0.010 0.000 0.000 0.044 NNW 0.000 0.000 0.000 0.000 0.009 0.030 0.000 0.000 0.000 0.039 SUBTOTAL 0.000 0.000 0.026 0.021 0.062 0.231 0.046 0.000 0.000 0.386 TOTAL HOURS OF VALID OBSERVATIONS 2076.000 TOTAL HOURS OF GROUND LEVEL RELEASE 258.740 TOTAL HOURS OF STABILITY CLASS C 44.430 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS C 8.010 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2021/04/21

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 76 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.003 0.135 0.424 0.169 0.000 0.000 0.000 0.732 NNE 0.000 0.000 0.007 0.093 0.249 0.113 0.000 0.000 0.000 0.462 NE 0.000 0.000 0.000 0.031 0.068 0.047 0.010 0.000 0.000 0.156 ENE 0.000 0.000 0.000 0.007 0.023 0.019 0.000 0.000 0.000 0.050 E 0.000 0.000 0.002 0.007 0.036 0.016 0.000 0.000 0.000 0.061 ESE 0.000 0.000 0.005 0.039 0.095 0.058 0.000 0.000 0.000 0.197 SE 0.000 0.000 0.010 0.093 0.101 0.202 0.000 0.000 0.000 0.407 SSE 0.000 0.000 0.024 0.042 0.038 0.000 0.000 0.000 0.000 0.104 S 0.000 0.000 0.032 0.017 0.049 0.178 0.000 0.000 0.000 0.276 SSW 0.000 0.000 0.002 0.008 0.008 0.036 0.000 0.000 0.000 0.054 SW 0.000 0.000 0.009 0.004 0.000 0.000 0.014 0.000 0.000 0.027 WSW 0.000 0.000 0.000 0.013 0.033 0.073 0.000 0.000 0.000 0.119 W 0.000 0.000 0.000 0.021 0.069 0.356 0.046 0.000 0.000 0.493 WNW 0.000 0.000 0.000 0.001 0.048 0.149 0.113 0.000 0.000 0.311 NW 0.000 0.000 0.000 0.000 0.044 0.204 0.755 0.000 0.000 1.003 NNW 0.000 0.000 0.000 0.029 0.205 0.475 0.056 0.000 0.000 0.765 SUBTOTAL 0.000 0.000 0.095 0.542 1.490 2.097 0.994 0.000 0.000 5.217 TOTAL HOURS OF VALID OBSERVATIONS 2076.000 TOTAL HOURS OF GROUND LEVEL RELEASE 258.740 TOTAL HOURS OF STABILITY CLASS D 1054.100 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS D 108.310 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2021/04/21

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 77 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.046 0.023 0.000 0.000 0.000 0.000 0.000 0.068 NNE 0.000 0.000 0.027 0.116 0.076 0.052 0.000 0.000 0.000 0.271 NE 0.000 0.000 0.003 0.032 0.043 0.050 0.000 0.000 0.000 0.128 ENE 0.000 0.000 0.001 0.012 0.020 0.008 0.000 0.000 0.000 0.041 E 0.000 0.000 0.032 0.055 0.037 0.000 0.000 0.000 0.000 0.124 ESE 0.000 0.000 0.040 0.103 0.053 0.010 0.000 0.000 0.000 0.206 SE 0.000 0.000 0.055 0.101 0.126 0.337 0.044 0.000 0.000 0.664 SSE 0.000 0.001 0.045 0.122 0.233 0.285 0.000 0.000 0.000 0.686 S 0.000 0.000 0.018 0.062 0.327 0.286 0.395 0.000 0.000 1.089 SSW 0.000 0.000 0.006 0.010 0.035 0.037 0.091 0.041 0.000 0.219 SW 0.000 0.000 0.005 0.000 0.006 0.024 0.034 0.000 0.000 0.069 WSW 0.000 0.000 0.007 0.011 0.000 0.009 0.000 0.000 0.000 0.027 W 0.000 0.000 0.018 0.078 0.027 0.016 0.000 0.000 0.000 0.139 WNW 0.000 0.000 0.003 0.004 0.025 0.048 0.000 0.000 0.000 0.080 NW 0.000 0.000 0.000 0.004 0.044 0.000 0.000 0.000 0.000 0.048 NNW 0.000 0.000 0.013 0.050 0.029 0.018 0.000 0.000 0.000 0.110 SUBTOTAL 0.000 0.001 0.320 0.782 1.081 1.181 0.565 0.041 0.000 3.971 TOTAL HOURS OF VALID OBSERVATIONS 2076.000 TOTAL HOURS OF GROUND LEVEL RELEASE 258.740 TOTAL HOURS OF STABILITY CLASS E 666.820 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS E 82.440 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2021/04/21

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 78 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.020 0.037 0.000 0.000 0.000 0.000 0.000 0.057 NNE 0.000 0.000 0.027 0.052 0.008 0.000 0.000 0.000 0.000 0.087 NE 0.000 0.000 0.005 0.012 0.000 0.000 0.000 0.000 0.000 0.016 ENE 0.000 0.000 0.007 0.000 0.000 0.000 0.000 0.000 0.000 0.007 E 0.000 0.000 0.075 0.016 0.000 0.000 0.000 0.000 0.000 0.091 ESE 0.000 0.005 0.074 0.046 0.007 0.000 0.000 0.000 0.000 0.132 SE 0.000 0.000 0.088 0.066 0.018 0.027 0.000 0.000 0.000 0.199 SSE 0.000 0.004 0.055 0.076 0.057 0.095 0.044 0.000 0.000 0.332 S 0.000 0.000 0.001 0.053 0.115 0.356 0.071 0.000 0.000 0.597 SSW 0.000 0.000 0.018 0.005 0.007 0.008 0.000 0.000 0.000 0.039 SW 0.000 0.000 0.011 0.011 0.007 0.000 0.000 0.000 0.000 0.028 WSW 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.003 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.000 0.005 NW 0.000 0.000 0.003 0.012 0.000 0.000 0.000 0.000 0.000 0.015 NNW 0.000 0.000 0.036 0.021 0.033 0.000 0.000 0.000 0.000 0.090 SUBTOTAL 0.000 0.009 0.424 0.411 0.253 0.487 0.115 0.000 0.000 1.699 TOTAL HOURS OF VALID OBSERVATIONS 2076.000 TOTAL HOURS OF GROUND LEVEL RELEASE 258.740 TOTAL HOURS OF STABILITY CLASS F 215.120 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS F 35.280 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2021/04/21

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 79 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.001 0.012 0.030 0.000 0.000 0.000 0.000 0.000 0.044 NNE 0.000 0.000 0.005 0.042 0.000 0.000 0.000 0.000 0.000 0.047 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.002 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.003 E 0.000 0.008 0.011 0.000 0.000 0.000 0.000 0.000 0.000 0.019 ESE 0.000 0.002 0.021 0.000 0.000 0.000 0.000 0.000 0.000 0.023 SE 0.000 0.003 0.062 0.023 0.000 0.000 0.000 0.000 0.000 0.087 SSE 0.000 0.000 0.041 0.089 0.069 0.064 0.000 0.000 0.000 0.262 S 0.000 0.000 0.017 0.110 0.016 0.000 0.000 0.000 0.000 0.144 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.003 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.002 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.007 0.000 0.000 0.000 0.000 0.000 0.007 SUBTOTAL 0.000 0.016 0.175 0.301 0.085 0.064 0.000 0.000 0.000 0.642 TOTAL HOURS OF VALID OBSERVATIONS 2076.000 TOTAL HOURS OF GROUND LEVEL RELEASE 258.740 TOTAL HOURS OF STABILITY CLASS G 73.660 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS G 13.320 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2021/04/21

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 80 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.001 0.081 0.224 0.442 0.286 0.032 0.000 0.000 1.067 NNE 0.000 0.000 0.067 0.307 0.358 0.278 0.000 0.000 0.000 1.009 NE 0.000 0.000 0.008 0.074 0.111 0.118 0.038 0.000 0.000 0.349 ENE 0.000 0.002 0.010 0.019 0.045 0.039 0.000 0.000 0.000 0.114 E 0.000 0.008 0.119 0.082 0.079 0.024 0.000 0.000 0.000 0.311 ESE 0.000 0.007 0.140 0.187 0.161 0.077 0.000 0.000 0.000 0.573 SE 0.000 0.003 0.234 0.282 0.269 0.592 0.044 0.000 0.000 1.425 SSE 0.000 0.005 0.171 0.335 0.422 0.443 0.044 0.000 0.000 1.420 S 0.000 0.000 0.073 0.308 0.516 0.817 0.465 0.000 0.000 2.180 SSW 0.000 0.000 0.043 0.036 0.049 0.081 0.091 0.041 0.000 0.341 SW 0.000 0.000 0.024 0.015 0.022 0.024 0.048 0.000 0.000 0.133 WSW 0.000 0.000 0.012 0.024 0.053 0.082 0.000 0.000 0.000 0.171 W 0.000 0.000 0.018 0.098 0.098 0.423 0.046 0.000 0.000 0.683 WNW 0.000 0.000 0.005 0.011 0.077 0.252 0.139 0.000 0.000 0.484 NW 0.000 0.000 0.003 0.016 0.087 0.263 0.762 0.000 0.000 1.132 NNW 0.000 0.000 0.049 0.106 0.280 0.546 0.056 0.000 0.000 1.037 SUBTOTAL 0.000 0.026 1.058 2.125 3.071 4.343 1.765 0.041 0.000 12.429 TOTAL HOURS OF VALID OBSERVATIONS 2082.000 TOTAL HOURS OF OBSERVATIONS 2160.000 RECOVERABILITY PERCENTAGE 96.389 TOTAL HOURS OF GROUND LEVEL RELEASE 258.770 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/04/21 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 81 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.039 0.000 0.000 0.039 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.047 0.000 0.039 0.000 0.000 0.086 TOTAL HOURS OF VALID OBSERVATIONS 2076.000 TOTAL HOURS OF ELEVATED RELEASES 1817.260 TOTAL HOURS OF STABILITY CLASS A 9.100 TOTAL HOURS OF ELEVATED STABILITY CLASS A 1.780 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2021/04/21

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 82 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.042 0.039 0.000 0.000 0.082 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.039 0.000 0.000 0.039 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.040 0.000 0.000 0.000 0.040 SSE 0.000 0.000 0.000 0.000 0.093 0.042 0.000 0.000 0.000 0.135 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.042 0.040 0.000 0.000 0.082 SW 0.000 0.000 0.000 0.000 0.000 0.041 0.000 0.000 0.000 0.041 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.093 0.208 0.118 0.000 0.000 0.420 TOTAL HOURS OF VALID OBSERVATIONS 2076.000 TOTAL HOURS OF ELEVATED RELEASES 1817.260 TOTAL HOURS OF STABILITY CLASS B 12.770 TOTAL HOURS OF ELEVATED STABILITY CLASS B 8.710 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2021/04/21

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 83 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.292 0.078 0.016 0.000 0.386 NNE 0.000 0.000 0.000 0.000 0.000 0.124 0.197 0.000 0.000 0.321 NE 0.000 0.000 0.000 0.000 0.000 0.040 0.039 0.000 0.000 0.079 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.039 0.000 0.000 0.039 SE 0.000 0.000 0.000 0.048 0.000 0.043 0.039 0.000 0.000 0.130 SSE 0.000 0.000 0.000 0.000 0.095 0.000 0.000 0.000 0.000 0.095 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.041 0.039 0.000 0.000 0.080 SW 0.000 0.000 0.000 0.000 0.000 0.088 0.040 0.000 0.000 0.128 WSW 0.000 0.000 0.000 0.000 0.000 0.125 0.039 0.000 0.000 0.163 W 0.000 0.000 0.000 0.000 0.000 0.041 0.040 0.000 0.000 0.081 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.040 0.000 0.000 0.040 NW 0.000 0.000 0.000 0.000 0.046 0.044 0.000 0.000 0.000 0.090 NNW 0.000 0.000 0.000 0.000 0.000 0.043 0.079 0.000 0.000 0.122 SUBTOTAL 0.000 0.000 0.000 0.048 0.141 0.882 0.667 0.016 0.000 1.754 TOTAL HOURS OF VALID OBSERVATIONS 2076.000 TOTAL HOURS OF ELEVATED RELEASES 1817.260 TOTAL HOURS OF STABILITY CLASS C 44.430 TOTAL HOURS OF ELEVATED STABILITY CLASS C 36.420 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2021/04/21

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 84 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.048 0.145 0.337 0.647 5.157 1.141 0.038 0.000 7.513 NNE 0.000 0.000 0.241 0.578 1.570 2.712 0.751 0.000 0.000 5.853 NE 0.000 0.000 0.048 0.626 1.015 0.642 0.117 0.000 0.000 2.448 ENE 0.000 0.000 0.048 0.578 0.280 0.296 0.000 0.000 0.000 1.202 E 0.000 0.000 0.145 0.289 0.323 0.421 0.039 0.000 0.000 1.217 ESE 0.000 0.000 0.096 0.385 0.328 0.892 0.513 0.000 0.000 2.215 SE 0.000 0.000 0.145 0.626 0.143 0.669 0.469 0.105 0.003 2.159 SSE 0.000 0.000 0.145 0.241 0.093 0.214 0.235 0.074 0.000 1.000 S 0.000 0.000 0.241 0.145 0.048 0.642 0.428 0.247 0.000 1.750 SSW 0.000 0.000 0.145 0.434 0.184 0.468 0.197 0.000 0.000 1.427 SW 0.000 0.000 0.193 0.626 0.474 0.176 0.000 0.034 0.000 1.502 WSW 0.000 0.000 0.096 0.626 0.144 0.424 0.391 0.000 0.000 1.682 W 0.000 0.000 0.289 0.434 0.836 1.800 1.381 0.000 0.000 4.739 WNW 0.000 0.000 0.193 0.241 0.604 1.225 0.785 0.030 0.000 3.078 NW 0.000 0.000 0.241 0.337 0.234 0.892 1.048 0.876 0.000 3.628 NNW 0.000 0.000 0.193 0.193 0.415 2.102 1.096 0.147 0.000 4.145 SUBTOTAL 0.000 0.048 2.601 6.696 7.337 18.733 8.591 1.550 0.003 45.558 TOTAL HOURS OF VALID OBSERVATIONS 2076.000 TOTAL HOURS OF ELEVATED RELEASES 1817.260 TOTAL HOURS OF STABILITY CLASS D 1054.100 TOTAL HOURS OF ELEVATED STABILITY CLASS D 945.790 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2021/04/21

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 85 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.048 0.193 0.230 0.598 0.000 0.000 0.000 1.068 NNE 0.000 0.000 0.145 0.337 0.700 1.108 0.277 0.000 0.000 2.567 NE 0.000 0.000 0.048 0.578 0.642 0.771 0.040 0.000 0.000 2.079 ENE 0.000 0.048 0.000 0.337 0.142 0.252 0.080 0.000 0.000 0.859 E 0.000 0.000 0.096 0.193 0.234 0.471 0.000 0.000 0.000 0.994 ESE 0.000 0.000 0.000 0.193 0.139 1.961 0.313 0.000 0.000 2.605 SE 0.000 0.048 0.145 0.241 0.281 1.463 0.941 0.260 0.034 3.413 SSE 0.000 0.000 0.096 0.193 0.368 0.622 0.974 0.141 0.016 2.410 S 0.000 0.000 0.145 0.337 0.189 0.509 1.988 0.685 0.057 3.910 SSW 0.000 0.000 0.241 0.193 0.379 0.541 0.391 0.252 0.007 2.003 SW 0.000 0.000 0.096 0.145 0.229 0.339 0.118 0.014 0.000 0.942 WSW 0.000 0.000 0.145 0.482 0.564 0.088 0.079 0.000 0.000 1.356 W 0.000 0.000 0.096 0.385 0.421 0.430 0.079 0.000 0.000 1.411 WNW 0.000 0.048 0.048 0.096 0.138 0.379 0.079 0.000 0.000 0.788 NW 0.000 0.000 0.000 0.193 0.045 0.298 0.000 0.000 0.000 0.536 NNW 0.000 0.000 0.048 0.048 0.362 0.551 0.198 0.000 0.000 1.208 SUBTOTAL 0.000 0.145 1.397 4.143 5.061 10.380 5.556 1.353 0.115 28.149 TOTAL HOURS OF VALID OBSERVATIONS 2076.000 TOTAL HOURS OF ELEVATED RELEASES 1817.260 TOTAL HOURS OF STABILITY CLASS E 666.820 TOTAL HOURS OF ELEVATED STABILITY CLASS E 584.380 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2021/04/21

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 86 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.045 0.342 0.000 0.000 0.000 0.387 NNE 0.000 0.000 0.048 0.000 0.142 0.340 0.000 0.000 0.000 0.530 NE 0.000 0.000 0.000 0.048 0.141 0.258 0.000 0.000 0.000 0.447 ENE 0.000 0.000 0.000 0.096 0.189 0.000 0.000 0.000 0.000 0.285 E 0.000 0.000 0.048 0.096 0.144 0.086 0.000 0.000 0.000 0.374 ESE 0.000 0.000 0.048 0.096 0.187 0.341 0.000 0.000 0.000 0.672 SE 0.000 0.000 0.000 0.145 0.230 0.806 0.118 0.000 0.000 1.300 SSE 0.000 0.000 0.193 0.193 0.272 0.588 0.395 0.095 0.000 1.735 S 0.000 0.000 0.048 0.145 0.093 0.373 0.390 0.169 0.000 1.217 SSW 0.000 0.000 0.145 0.096 0.090 0.128 0.039 0.000 0.000 0.498 SW 0.000 0.048 0.048 0.048 0.186 0.087 0.000 0.000 0.000 0.418 WSW 0.000 0.000 0.096 0.000 0.045 0.000 0.000 0.000 0.000 0.142 W 0.000 0.048 0.145 0.096 0.048 0.043 0.000 0.000 0.000 0.380 WNW 0.000 0.048 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.096 NW 0.000 0.000 0.000 0.048 0.047 0.000 0.000 0.000 0.000 0.095 NNW 0.000 0.000 0.000 0.000 0.000 0.087 0.000 0.000 0.000 0.087 SUBTOTAL 0.000 0.145 0.867 1.108 1.859 3.479 0.942 0.263 0.000 8.663 TOTAL HOURS OF VALID OBSERVATIONS 2076.000 TOTAL HOURS OF ELEVATED RELEASES 1817.260 TOTAL HOURS OF STABILITY CLASS F 215.120 TOTAL HOURS OF ELEVATED STABILITY CLASS F 179.840 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2021/04/21

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 87 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.048 0.000 0.000 0.042 0.000 0.000 0.000 0.091 NNE 0.000 0.000 0.048 0.000 0.000 0.247 0.000 0.000 0.000 0.295 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 E 0.000 0.000 0.000 0.096 0.093 0.000 0.000 0.000 0.000 0.189 ESE 0.000 0.000 0.000 0.000 0.093 0.214 0.000 0.000 0.000 0.307 SE 0.000 0.000 0.000 0.193 0.278 0.173 0.000 0.000 0.000 0.645 SSE 0.000 0.000 0.000 0.000 0.048 0.084 0.000 0.000 0.000 0.132 S 0.000 0.000 0.000 0.096 0.184 0.129 0.040 0.000 0.000 0.449 SSW 0.000 0.000 0.048 0.048 0.045 0.086 0.000 0.000 0.000 0.227 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.048 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.096 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.048 0.193 0.046 0.000 0.000 0.000 0.000 0.287 NW 0.000 0.000 0.048 0.000 0.045 0.000 0.000 0.000 0.000 0.093 NNW 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.048 SUBTOTAL 0.000 0.048 0.337 0.626 0.879 0.976 0.040 0.000 0.000 2.907 TOTAL HOURS OF VALID OBSERVATIONS 2076.000 TOTAL HOURS OF ELEVATED RELEASES 1817.260 TOTAL HOURS OF STABILITY CLASS G 73.660 TOTAL HOURS OF ELEVATED STABILITY CLASS G 60.340 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2021/04/21

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 88 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.048 0.240 0.528 0.919 6.455 1.254 0.054 0.000 9.499 NNE 0.000 0.000 0.480 0.913 2.452 4.518 1.299 0.000 0.000 9.662 NE 0.000 0.000 0.096 1.249 1.793 1.706 0.195 0.000 0.000 5.038 ENE 0.000 0.048 0.048 1.009 0.655 0.547 0.080 0.000 0.000 2.386 E 0.000 0.000 0.288 0.672 0.791 0.975 0.039 0.000 0.000 2.766 ESE 0.000 0.000 0.144 0.672 0.744 3.398 0.862 0.000 0.000 5.821 SE 0.000 0.048 0.288 1.249 0.929 3.186 1.563 0.364 0.037 7.664 SSE 0.000 0.000 0.432 0.624 1.014 1.546 1.598 0.308 0.016 5.540 S 0.000 0.000 0.432 0.720 0.512 1.648 2.838 1.098 0.057 7.306 SSW 0.000 0.000 0.576 0.817 0.696 1.302 0.704 0.252 0.007 4.354 SW 0.000 0.048 0.336 0.913 0.887 0.729 0.158 0.048 0.000 3.118 WSW 0.000 0.048 0.384 1.105 0.751 0.635 0.506 0.000 0.000 3.429 W 0.000 0.048 0.528 0.961 1.301 2.308 1.495 0.000 0.000 6.641 WNW 0.000 0.096 0.336 0.528 0.785 1.600 0.901 0.030 0.000 4.277 NW 0.000 0.000 0.288 0.576 0.415 1.230 1.045 0.874 0.000 4.428 NNW 0.000 0.000 0.288 0.288 0.775 2.775 1.370 0.146 0.000 5.642 SUBTOTAL 0.000 0.384 5.187 12.824 15.420 34.558 15.907 3.173 0.117 87.571 TOTAL HOURS OF VALID OBSERVATIONS 2082.000 TOTAL HOURS OF OBSERVATIONS 2160.000 RECOVERABILITY PERCENTAGE 96.389 TOTAL HOURS OF ELEVATED RELEASES 1823.230 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2021/04/21

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 89 of 165 Table 7-B Split Level Releases - 2nd Quarter JFD Joint Frequency Distribution In Percent (Ground Level Release Mode and Elevated Release Mode)

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 90 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.014 0.018 0.000 0.000 0.031 NNE 0.000 0.000 0.000 0.000 0.019 0.049 0.000 0.000 0.000 0.067 NE 0.000 0.000 0.000 0.000 0.000 0.021 0.000 0.000 0.000 0.021 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.007 0.000 0.000 0.000 0.000 0.000 0.007 SE 0.000 0.000 0.000 0.013 0.048 0.080 0.000 0.000 0.000 0.141 SSE 0.000 0.000 0.001 0.036 0.044 0.175 0.000 0.000 0.000 0.256 S 0.000 0.000 0.000 0.014 0.085 0.055 0.000 0.000 0.000 0.153 SSW 0.000 0.000 0.000 0.001 0.012 0.048 0.000 0.000 0.000 0.061 SW 0.000 0.000 0.000 0.002 0.018 0.047 0.000 0.000 0.000 0.067 WSW 0.000 0.000 0.000 0.000 0.004 0.000 0.000 0.000 0.000 0.004 W 0.000 0.000 0.000 0.000 0.009 0.046 0.026 0.000 0.000 0.081 WNW 0.000 0.000 0.000 0.000 0.003 0.005 0.009 0.000 0.000 0.017 NW 0.000 0.000 0.000 0.000 0.000 0.021 0.029 0.041 0.000 0.091 NNW 0.000 0.000 0.000 0.000 0.000 0.059 0.074 0.000 0.000 0.133 SUBTOTAL 0.000 0.000 0.001 0.074 0.241 0.619 0.155 0.041 0.000 1.131 TOTAL HOURS OF VALID OBSERVATIONS 2102.000 TOTAL HOURS OF GROUND LEVEL RELEASE 220.150 TOTAL HOURS OF STABILITY CLASS A 27.250 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS A 23.780 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2021/07/20

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BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.003 0.009 0.020 0.000 0.000 0.000 0.031 NNE 0.000 0.000 0.000 0.000 0.020 0.015 0.000 0.000 0.000 0.034 NE 0.000 0.000 0.000 0.000 0.011 0.013 0.000 0.000 0.000 0.025 ENE 0.000 0.000 0.000 0.000 0.006 0.000 0.000 0.000 0.000 0.006 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.012 0.000 0.000 0.000 0.012 SE 0.000 0.000 0.000 0.007 0.065 0.098 0.043 0.000 0.000 0.213 SSE 0.000 0.000 0.000 0.007 0.003 0.026 0.000 0.000 0.000 0.035 S 0.000 0.000 0.000 0.025 0.044 0.044 0.000 0.000 0.000 0.113 SSW 0.000 0.000 0.000 0.009 0.035 0.020 0.029 0.000 0.000 0.093 SW 0.000 0.000 0.000 0.004 0.002 0.000 0.000 0.000 0.000 0.006 WSW 0.000 0.000 0.000 0.001 0.025 0.007 0.000 0.000 0.000 0.034 W 0.000 0.000 0.000 0.001 0.000 0.031 0.010 0.000 0.000 0.042 WNW 0.000 0.000 0.000 0.000 0.001 0.034 0.016 0.000 0.000 0.051 NW 0.000 0.000 0.000 0.000 0.005 0.069 0.009 0.000 0.000 0.082 NNW 0.000 0.000 0.000 0.003 0.013 0.081 0.000 0.000 0.000 0.097 SUBTOTAL 0.000 0.000 0.000 0.059 0.238 0.470 0.107 0.000 0.000 0.874 TOTAL HOURS OF VALID OBSERVATIONS 2102.000 TOTAL HOURS OF GROUND LEVEL RELEASE 220.150 TOTAL HOURS OF STABILITY CLASS B 31.790 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS B 18.370 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/07/20 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.005 NNE 0.000 0.000 0.000 0.001 0.008 0.007 0.000 0.000 0.000 0.015 NE 0.000 0.000 0.000 0.000 0.000 0.021 0.000 0.000 0.000 0.021 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.002 0.000 0.000 0.000 0.000 0.002 ESE 0.000 0.000 0.000 0.000 0.008 0.000 0.000 0.000 0.000 0.008 SE 0.000 0.000 0.000 0.006 0.038 0.042 0.000 0.000 0.000 0.086 SSE 0.000 0.000 0.000 0.018 0.020 0.014 0.000 0.000 0.000 0.051 S 0.000 0.000 0.000 0.009 0.046 0.048 0.000 0.000 0.000 0.102 SSW 0.000 0.000 0.000 0.010 0.000 0.010 0.029 0.000 0.000 0.048 SW 0.000 0.000 0.000 0.004 0.010 0.032 0.000 0.000 0.000 0.046 WSW 0.000 0.000 0.000 0.000 0.017 0.015 0.000 0.000 0.000 0.032 W 0.000 0.000 0.000 0.000 0.003 0.033 0.009 0.000 0.000 0.046 WNW 0.000 0.000 0.000 0.000 0.020 0.070 0.006 0.000 0.000 0.097 NW 0.000 0.000 0.000 0.000 0.004 0.050 0.000 0.000 0.000 0.054 NNW 0.000 0.000 0.000 0.000 0.024 0.040 0.010 0.000 0.000 0.074 SUBTOTAL 0.000 0.000 0.000 0.047 0.204 0.382 0.053 0.000 0.000 0.687 TOTAL HOURS OF VALID OBSERVATIONS 2102.000 TOTAL HOURS OF GROUND LEVEL RELEASE 220.150 TOTAL HOURS OF STABILITY CLASS C 85.160 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS C 14.440 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2021/07/20

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BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.040 0.045 0.025 0.000 0.000 0.000 0.110 NNE 0.000 0.000 0.000 0.024 0.074 0.041 0.000 0.000 0.000 0.139 NE 0.000 0.000 0.000 0.009 0.018 0.022 0.000 0.000 0.000 0.048 ENE 0.000 0.000 0.000 0.001 0.008 0.000 0.000 0.000 0.000 0.010 E 0.000 0.000 0.000 0.005 0.010 0.000 0.000 0.000 0.000 0.016 ESE 0.000 0.000 0.000 0.060 0.067 0.009 0.000 0.000 0.000 0.137 SE 0.000 0.000 0.010 0.116 0.164 0.301 0.000 0.000 0.000 0.591 SSE 0.000 0.000 0.018 0.177 0.130 0.120 0.091 0.000 0.000 0.537 S 0.000 0.000 0.000 0.117 0.171 0.240 0.180 0.000 0.000 0.708 SSW 0.000 0.000 0.002 0.032 0.085 0.257 0.108 0.000 0.000 0.485 SW 0.000 0.000 0.000 0.029 0.065 0.118 0.047 0.000 0.000 0.259 WSW 0.000 0.000 0.000 0.029 0.063 0.037 0.000 0.000 0.000 0.129 W 0.000 0.000 0.000 0.025 0.054 0.104 0.009 0.000 0.000 0.192 WNW 0.000 0.000 0.000 0.004 0.049 0.129 0.036 0.027 0.000 0.245 NW 0.000 0.000 0.000 0.000 0.038 0.161 0.075 0.067 0.000 0.342 NNW 0.000 0.000 0.000 0.013 0.102 0.160 0.023 0.000 0.000 0.298 SUBTOTAL 0.000 0.000 0.030 0.684 1.144 1.725 0.569 0.094 0.000 4.245 TOTAL HOURS OF VALID OBSERVATIONS 2102.000 TOTAL HOURS OF GROUND LEVEL RELEASE 220.150 TOTAL HOURS OF STABILITY CLASS D 1127.470 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS D 89.220 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/07/20 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.021 0.016 0.033 0.000 0.000 0.000 0.000 0.070 NNE 0.000 0.000 0.007 0.029 0.014 0.000 0.000 0.000 0.000 0.050 NE 0.000 0.000 0.001 0.005 0.034 0.024 0.000 0.000 0.000 0.065 ENE 0.000 0.000 0.008 0.005 0.007 0.000 0.000 0.000 0.000 0.019 E 0.000 0.000 0.020 0.022 0.007 0.000 0.000 0.000 0.000 0.049 ESE 0.000 0.000 0.020 0.118 0.108 0.000 0.000 0.000 0.000 0.246 SE 0.000 0.000 0.021 0.069 0.124 0.050 0.000 0.000 0.000 0.263 SSE 0.000 0.000 0.048 0.076 0.036 0.020 0.000 0.000 0.000 0.179 S 0.000 0.000 0.010 0.072 0.126 0.243 0.136 0.000 0.000 0.587 SSW 0.000 0.000 0.000 0.029 0.056 0.051 0.108 0.000 0.000 0.245 SW 0.000 0.000 0.004 0.014 0.019 0.016 0.062 0.000 0.000 0.115 WSW 0.000 0.000 0.005 0.010 0.011 0.015 0.000 0.000 0.000 0.040 W 0.000 0.000 0.006 0.010 0.028 0.039 0.000 0.000 0.000 0.083 WNW 0.000 0.000 0.000 0.004 0.009 0.004 0.000 0.000 0.000 0.017 NW 0.000 0.000 0.000 0.027 0.029 0.044 0.000 0.000 0.000 0.100 NNW 0.000 0.000 0.012 0.059 0.049 0.028 0.000 0.000 0.000 0.149 SUBTOTAL 0.000 0.000 0.183 0.565 0.690 0.534 0.306 0.000 0.000 2.278 TOTAL HOURS OF VALID OBSERVATIONS 2102.000 TOTAL HOURS OF GROUND LEVEL RELEASE 220.150 TOTAL HOURS OF STABILITY CLASS E 507.170 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS E 47.880 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/07/20 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 95 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.099 0.093 0.007 0.000 0.000 0.000 0.000 0.199 NNE 0.000 0.000 0.001 0.050 0.031 0.000 0.000 0.000 0.000 0.082 NE 0.000 0.000 0.005 0.019 0.016 0.000 0.000 0.000 0.000 0.039 ENE 0.000 0.000 0.001 0.026 0.009 0.000 0.000 0.000 0.000 0.036 E 0.000 0.000 0.044 0.020 0.000 0.000 0.000 0.000 0.000 0.063 ESE 0.000 0.000 0.018 0.018 0.000 0.000 0.000 0.000 0.000 0.035 SE 0.000 0.000 0.021 0.004 0.000 0.000 0.000 0.000 0.000 0.025 SSE 0.000 0.004 0.051 0.041 0.000 0.020 0.000 0.000 0.000 0.115 S 0.000 0.000 0.018 0.042 0.071 0.028 0.000 0.000 0.000 0.159 SSW 0.000 0.000 0.000 0.000 0.006 0.000 0.000 0.000 0.000 0.006 SW 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.001 WSW 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.003 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.003 0.012 0.008 0.000 0.000 0.000 0.023 NW 0.000 0.000 0.004 0.002 0.014 0.000 0.000 0.000 0.000 0.020 NNW 0.000 0.000 0.048 0.061 0.007 0.010 0.000 0.000 0.000 0.126 SUBTOTAL 0.000 0.004 0.314 0.379 0.174 0.065 0.000 0.000 0.000 0.935 TOTAL HOURS OF VALID OBSERVATIONS 2102.000 TOTAL HOURS OF GROUND LEVEL RELEASE 220.150 TOTAL HOURS OF STABILITY CLASS F 236.300 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS F 19.650 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/07/20 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.041 0.084 0.008 0.000 0.000 0.000 0.000 0.133 NNE 0.000 0.000 0.000 0.000 0.009 0.000 0.000 0.000 0.000 0.009 NE 0.000 0.000 0.001 0.005 0.000 0.000 0.000 0.000 0.000 0.007 ENE 0.000 0.000 0.003 0.004 0.000 0.009 0.000 0.000 0.000 0.016 E 0.000 0.005 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.009 ESE 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.003 SE 0.000 0.001 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.002 SSE 0.000 0.000 0.032 0.030 0.000 0.000 0.000 0.000 0.000 0.063 S 0.000 0.000 0.014 0.000 0.004 0.000 0.000 0.000 0.000 0.018 SSW 0.000 0.000 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.003 SW 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.001 WSW 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.000 0.000 0.005 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.002 0.005 0.011 0.003 0.000 0.000 0.000 0.021 NW 0.000 0.000 0.000 0.000 0.015 0.000 0.000 0.000 0.000 0.015 NNW 0.000 0.000 0.008 0.005 0.008 0.000 0.000 0.000 0.000 0.020 SUBTOTAL 0.000 0.010 0.111 0.135 0.057 0.011 0.000 0.000 0.000 0.324 TOTAL HOURS OF VALID OBSERVATIONS 2102.000 TOTAL HOURS OF GROUND LEVEL RELEASE 220.150 TOTAL HOURS OF STABILITY CLASS G 86.860 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS G 6.810 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/07/20 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.041 0.039 0.000 0.000 0.080 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.045 0.000 0.039 0.000 0.000 0.085 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.045 0.041 0.079 0.000 0.000 0.165 TOTAL HOURS OF VALID OBSERVATIONS 2102.000 TOTAL HOURS OF ELEVATED RELEASES 1881.850 TOTAL HOURS OF STABILITY CLASS A 27.250 TOTAL HOURS OF ELEVATED STABILITY CLASS A 3.470 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/07/20 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.039 0.000 0.000 0.039 NNE 0.000 0.000 0.000 0.000 0.000 0.042 0.000 0.000 0.000 0.042 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.042 0.000 0.028 0.000 0.070 SSE 0.000 0.000 0.000 0.000 0.092 0.000 0.039 0.000 0.000 0.130 S 0.000 0.000 0.000 0.000 0.046 0.044 0.000 0.000 0.000 0.090 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.042 0.000 0.000 0.000 0.042 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.039 0.000 0.000 0.039 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.078 0.108 0.000 0.186 SUBTOTAL 0.000 0.000 0.000 0.000 0.137 0.171 0.195 0.136 0.000 0.638 TOTAL HOURS OF VALID OBSERVATIONS 2102.000 TOTAL HOURS OF ELEVATED RELEASES 1881.850 TOTAL HOURS OF STABILITY CLASS B 31.790 TOTAL HOURS OF ELEVATED STABILITY CLASS B 13.420 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/07/20 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 99 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.045 0.122 0.039 0.000 0.000 0.206 NNE 0.000 0.000 0.000 0.000 0.000 0.332 0.039 0.000 0.000 0.372 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.127 0.000 0.000 0.000 0.127 SE 0.000 0.000 0.000 0.000 0.135 0.209 0.116 0.091 0.001 0.552 SSE 0.000 0.000 0.000 0.048 0.186 0.206 0.116 0.036 0.000 0.591 S 0.000 0.000 0.000 0.000 0.045 0.130 0.039 0.000 0.000 0.215 SSW 0.000 0.000 0.000 0.095 0.000 0.000 0.000 0.000 0.000 0.095 SW 0.000 0.000 0.000 0.000 0.045 0.123 0.000 0.000 0.000 0.168 WSW 0.000 0.000 0.000 0.000 0.048 0.086 0.000 0.000 0.000 0.134 W 0.000 0.000 0.000 0.000 0.000 0.207 0.154 0.000 0.000 0.361 WNW 0.000 0.000 0.000 0.000 0.044 0.000 0.078 0.000 0.000 0.122 NW 0.000 0.000 0.000 0.000 0.000 0.082 0.039 0.000 0.000 0.121 NNW 0.000 0.000 0.000 0.000 0.000 0.040 0.231 0.030 0.000 0.301 SUBTOTAL 0.000 0.000 0.000 0.143 0.548 1.664 0.852 0.157 0.001 3.364 TOTAL HOURS OF VALID OBSERVATIONS 2102.000 TOTAL HOURS OF ELEVATED RELEASES 1881.850 TOTAL HOURS OF STABILITY CLASS C 85.160 TOTAL HOURS OF ELEVATED STABILITY CLASS C 70.720 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/07/20 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 100 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.095 0.333 0.546 1.449 0.273 0.000 0.000 2.696 NNE 0.000 0.000 0.048 0.238 0.547 1.084 0.156 0.000 0.000 2.072 NE 0.000 0.000 0.000 0.048 0.047 0.385 0.039 0.000 0.000 0.519 ENE 0.000 0.000 0.190 0.143 0.185 0.127 0.000 0.000 0.000 0.645 E 0.000 0.000 0.238 0.048 0.090 0.085 0.000 0.000 0.000 0.460 ESE 0.000 0.000 0.048 0.285 0.506 1.084 0.808 0.308 0.004 3.043 SE 0.000 0.000 0.618 1.332 0.821 1.747 1.696 0.537 0.014 6.766 SSE 0.000 0.048 0.618 0.761 0.646 1.149 1.895 0.142 0.000 5.259 S 0.000 0.048 0.285 0.714 0.822 1.616 1.280 0.354 0.000 5.118 SSW 0.000 0.000 0.428 0.381 0.824 1.580 0.582 0.188 0.000 3.983 SW 0.000 0.000 0.238 0.618 0.366 1.256 0.661 0.113 0.000 3.252 WSW 0.000 0.000 0.190 1.047 0.736 1.303 0.117 0.000 0.000 3.393 W 0.000 0.000 0.190 0.381 1.059 1.474 0.351 0.000 0.000 3.455 WNW 0.000 0.000 0.048 0.190 0.863 1.251 0.350 0.021 0.010 2.733 NW 0.000 0.000 0.095 0.333 0.373 1.382 0.504 0.084 0.006 2.778 NNW 0.000 0.000 0.190 0.190 0.231 1.693 0.892 0.024 0.000 3.221 SUBTOTAL 0.000 0.095 3.520 7.041 8.660 18.667 9.603 1.772 0.035 49.393 TOTAL HOURS OF VALID OBSERVATIONS 2102.000 TOTAL HOURS OF ELEVATED RELEASES 1881.850 TOTAL HOURS OF STABILITY CLASS D 1127.470 TOTAL HOURS OF ELEVATED STABILITY CLASS D 1038.250 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/07/20 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 101 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.238 0.228 1.373 0.157 0.000 0.000 1.995 NNE 0.000 0.000 0.095 0.333 0.272 0.551 0.118 0.000 0.000 1.370 NE 0.000 0.000 0.143 0.000 0.140 0.250 0.039 0.000 0.000 0.572 ENE 0.000 0.000 0.143 0.000 0.048 0.206 0.000 0.000 0.000 0.396 E 0.000 0.000 0.000 0.238 0.044 0.211 0.000 0.000 0.000 0.493 ESE 0.000 0.000 0.048 0.428 0.184 1.570 0.273 0.000 0.000 2.503 SE 0.000 0.000 0.285 0.285 0.460 0.830 0.579 0.026 0.000 2.466 SSE 0.000 0.000 0.143 0.476 0.275 0.585 0.888 0.052 0.010 2.429 S 0.000 0.048 0.000 0.285 0.138 1.160 1.010 0.068 0.000 2.709 SSW 0.000 0.000 0.143 0.428 0.093 0.581 0.078 0.000 0.000 1.323 SW 0.000 0.000 0.095 0.190 0.229 0.084 0.117 0.096 0.000 0.812 WSW 0.000 0.000 0.095 0.476 0.602 0.383 0.000 0.000 0.000 1.557 W 0.000 0.000 0.048 0.095 0.229 0.294 0.039 0.000 0.000 0.706 WNW 0.000 0.000 0.095 0.143 0.045 0.000 0.000 0.000 0.000 0.283 NW 0.000 0.000 0.238 0.143 0.094 0.208 0.039 0.000 0.000 0.722 NNW 0.000 0.000 0.048 0.428 0.092 0.831 0.115 0.000 0.000 1.514 SUBTOTAL 0.000 0.048 1.618 4.186 3.174 9.120 3.453 0.241 0.010 21.850 TOTAL HOURS OF VALID OBSERVATIONS 2102.000 TOTAL HOURS OF ELEVATED RELEASES 1881.850 TOTAL HOURS OF STABILITY CLASS E 507.170 TOTAL HOURS OF ELEVATED STABILITY CLASS E 459.290 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/07/20 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 102 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.048 0.048 0.092 0.671 0.000 0.000 0.000 0.858 NNE 0.000 0.000 0.095 0.000 0.094 0.669 0.079 0.000 0.000 0.937 NE 0.000 0.000 0.095 0.048 0.000 0.285 0.039 0.000 0.000 0.467 ENE 0.000 0.000 0.000 0.095 0.047 0.171 0.078 0.000 0.000 0.391 E 0.000 0.000 0.143 0.238 0.272 0.171 0.000 0.000 0.000 0.824 ESE 0.000 0.000 0.143 0.285 0.225 0.348 0.000 0.000 0.000 1.001 SE 0.000 0.000 0.190 0.143 0.460 0.380 0.000 0.000 0.000 1.173 SSE 0.000 0.000 0.000 0.190 0.227 0.457 0.039 0.000 0.000 0.913 S 0.000 0.048 0.000 0.285 0.227 0.531 0.000 0.000 0.000 1.091 SSW 0.000 0.000 0.095 0.285 0.047 0.084 0.000 0.000 0.000 0.511 SW 0.000 0.000 0.048 0.190 0.000 0.086 0.000 0.000 0.000 0.324 WSW 0.000 0.000 0.095 0.143 0.000 0.087 0.000 0.000 0.000 0.325 W 0.000 0.000 0.048 0.048 0.000 0.000 0.000 0.000 0.000 0.095 WNW 0.000 0.000 0.048 0.048 0.094 0.000 0.000 0.000 0.000 0.189 NW 0.000 0.000 0.048 0.000 0.184 0.169 0.000 0.000 0.000 0.401 NNW 0.000 0.000 0.000 0.048 0.090 0.630 0.038 0.000 0.000 0.806 SUBTOTAL 0.000 0.048 1.094 2.093 2.059 4.739 0.274 0.000 0.000 10.307 TOTAL HOURS OF VALID OBSERVATIONS 2102.000 TOTAL HOURS OF ELEVATED RELEASES 1881.850 TOTAL HOURS OF STABILITY CLASS F 236.300 TOTAL HOURS OF ELEVATED STABILITY CLASS F 216.650 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/07/20 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 103 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.364 0.039 0.000 0.000 0.404 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.235 0.000 0.000 0.235 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.090 0.000 0.000 0.000 0.000 0.090 E 0.000 0.000 0.048 0.095 0.000 0.000 0.000 0.000 0.000 0.143 ESE 0.000 0.048 0.095 0.190 0.000 0.000 0.000 0.000 0.000 0.333 SE 0.000 0.000 0.095 0.333 0.186 0.044 0.000 0.000 0.000 0.657 SSE 0.000 0.000 0.285 0.143 0.047 0.000 0.000 0.000 0.000 0.475 S 0.000 0.048 0.048 0.143 0.000 0.000 0.000 0.000 0.000 0.238 SSW 0.000 0.000 0.095 0.143 0.048 0.000 0.000 0.000 0.000 0.285 SW 0.000 0.095 0.095 0.048 0.000 0.000 0.000 0.000 0.000 0.238 WSW 0.000 0.048 0.095 0.048 0.000 0.000 0.000 0.000 0.000 0.190 W 0.000 0.000 0.048 0.095 0.000 0.000 0.000 0.000 0.000 0.143 WNW 0.000 0.000 0.095 0.095 0.000 0.000 0.000 0.000 0.000 0.190 NW 0.000 0.048 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.095 NNW 0.000 0.000 0.000 0.048 0.044 0.000 0.000 0.000 0.000 0.092 SUBTOTAL 0.000 0.285 0.999 1.427 0.414 0.408 0.274 0.000 0.000 3.808 TOTAL HOURS OF VALID OBSERVATIONS 2102.000 TOTAL HOURS OF ELEVATED RELEASES 1881.850 TOTAL HOURS OF STABILITY CLASS G 86.860 TOTAL HOURS OF ELEVATED STABILITY CLASS G 80.050 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2021/07/20

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 104 of 165 Table 7-C Split Level Releases - 3rd Quarter JFD Joint Frequency Distribution In Percent (Ground Level Release Mode and Elevated Release Mode)

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 105 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 1 OF 2 GROUND LEVEL RELEASE MODE JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.026 0.065 0.000 0.000 0.000 0.090 NNE 0.000 0.000 0.000 0.000 0.020 0.042 0.000 0.000 0.000 0.063 NE 0.000 0.000 0.000 0.000 0.017 0.013 0.000 0.000 0.000 0.030 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.005 ESE 0.000 0.000 0.003 0.008 0.006 0.000 0.000 0.000 0.000 0.017 SE 0.000 0.000 0.000 0.064 0.149 0.087 0.000 0.000 0.000 0.299 SSE 0.000 0.000 0.002 0.036 0.047 0.027 0.000 0.000 0.000 0.113 S 0.000 0.000 0.000 0.053 0.030 0.016 0.000 0.000 0.000 0.099 SSW 0.000 0.000 0.000 0.014 0.011 0.000 0.000 0.000 0.000 0.025 SW 0.000 0.000 0.000 0.010 0.027 0.016 0.000 0.000 0.000 0.052 WSW 0.000 0.000 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.003 W 0.000 0.000 0.000 0.002 0.024 0.011 0.000 0.000 0.000 0.038 WNW 0.000 0.000 0.000 0.000 0.018 0.047 0.000 0.000 0.000 0.065 NW 0.000 0.000 0.000 0.000 0.005 0.073 0.077 0.000 0.000 0.155 NNW 0.000 0.000 0.000 0.000 0.005 0.073 0.000 0.000 0.000 0.078 SUBTOTAL 0.000 0.000 0.005 0.186 0.395 0.470 0.077 0.000 0.000 1.133 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF GROUND LEVEL RELEASE 133.300 TOTAL HOURS OF STABILITY CLASS A 24.920 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS A 24.920 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/10/14 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 106 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 1 OF 2 GROUND LEVEL RELEASE MODE JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.016 0.007 0.000 0.000 0.000 0.023 NNE 0.000 0.000 0.000 0.000 0.024 0.012 0.000 0.000 0.000 0.035 NE 0.000 0.000 0.000 0.002 0.000 0.016 0.000 0.000 0.000 0.018 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.009 0.000 0.000 0.000 0.009 ESE 0.000 0.000 0.000 0.016 0.033 0.000 0.000 0.000 0.000 0.049 SE 0.000 0.000 0.000 0.027 0.017 0.009 0.000 0.000 0.000 0.053 SSE 0.000 0.000 0.000 0.004 0.000 0.000 0.000 0.000 0.000 0.004 S 0.000 0.000 0.000 0.008 0.042 0.000 0.020 0.000 0.000 0.070 SSW 0.000 0.000 0.000 0.000 0.000 0.009 0.000 0.000 0.000 0.009 SW 0.000 0.000 0.000 0.008 0.000 0.000 0.000 0.000 0.000 0.008 WSW 0.000 0.000 0.000 0.006 0.005 0.000 0.000 0.000 0.000 0.010 W 0.000 0.000 0.000 0.000 0.000 0.006 0.000 0.000 0.000 0.006 WNW 0.000 0.000 0.000 0.000 0.012 0.020 0.008 0.000 0.000 0.039 NW 0.000 0.000 0.000 0.000 0.008 0.005 0.000 0.032 0.000 0.045 NNW 0.000 0.000 0.000 0.003 0.009 0.022 0.000 0.000 0.000 0.034 SUBTOTAL 0.000 0.000 0.000 0.074 0.165 0.113 0.028 0.032 0.000 0.412 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF GROUND LEVEL RELEASE 133.300 TOTAL HOURS OF STABILITY CLASS B 21.380 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS B 9.070 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/10/14 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 107 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 1 OF 2 GROUND LEVEL RELEASE MODE JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.002 0.013 0.005 0.000 0.000 0.000 0.020 NNE 0.000 0.000 0.000 0.005 0.012 0.000 0.000 0.000 0.000 0.017 NE 0.000 0.000 0.000 0.002 0.014 0.012 0.000 0.000 0.000 0.028 ENE 0.000 0.000 0.000 0.001 0.000 0.015 0.019 0.000 0.000 0.035 E 0.000 0.000 0.000 0.006 0.000 0.000 0.000 0.000 0.000 0.006 ESE 0.000 0.000 0.000 0.000 0.015 0.000 0.011 0.000 0.000 0.026 SE 0.000 0.000 0.006 0.037 0.023 0.000 0.000 0.000 0.000 0.066 SSE 0.000 0.000 0.000 0.025 0.005 0.000 0.000 0.000 0.000 0.030 S 0.000 0.000 0.000 0.017 0.027 0.028 0.000 0.000 0.000 0.072 SSW 0.000 0.000 0.000 0.003 0.009 0.015 0.000 0.000 0.000 0.027 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.002 0.009 0.000 0.000 0.000 0.000 0.011 W 0.000 0.000 0.000 0.000 0.000 0.006 0.000 0.000 0.000 0.006 WNW 0.000 0.000 0.000 0.000 0.000 0.012 0.000 0.000 0.000 0.012 NW 0.000 0.000 0.000 0.000 0.000 0.020 0.000 0.000 0.000 0.020 NNW 0.000 0.000 0.000 0.002 0.000 0.009 0.000 0.000 0.000 0.011 SUBTOTAL 0.000 0.000 0.007 0.104 0.126 0.123 0.030 0.000 0.000 0.390 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF GROUND LEVEL RELEASE 133.300 TOTAL HOURS OF STABILITY CLASS C 77.170 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS C 8.580 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/10/14 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 108 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 1 OF 2 GROUND LEVEL RELEASE MODE JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.005 0.028 0.025 0.007 0.000 0.000 0.000 0.065 NNE 0.000 0.000 0.000 0.034 0.027 0.015 0.000 0.000 0.000 0.076 NE 0.000 0.000 0.002 0.019 0.015 0.008 0.000 0.000 0.000 0.045 ENE 0.000 0.000 0.001 0.014 0.006 0.000 0.017 0.000 0.000 0.039 E 0.000 0.000 0.003 0.053 0.022 0.015 0.025 0.000 0.000 0.117 ESE 0.000 0.000 0.020 0.111 0.103 0.041 0.000 0.000 0.000 0.275 SE 0.000 0.000 0.018 0.131 0.085 0.008 0.000 0.000 0.000 0.243 SSE 0.000 0.000 0.032 0.074 0.026 0.000 0.000 0.000 0.000 0.132 S 0.000 0.000 0.004 0.131 0.142 0.298 0.000 0.000 0.000 0.575 SSW 0.000 0.000 0.000 0.031 0.095 0.107 0.000 0.000 0.000 0.234 SW 0.000 0.000 0.001 0.025 0.033 0.017 0.000 0.000 0.000 0.076 WSW 0.000 0.000 0.000 0.015 0.007 0.008 0.000 0.000 0.000 0.030 W 0.000 0.000 0.000 0.029 0.048 0.005 0.000 0.000 0.000 0.083 WNW 0.000 0.000 0.000 0.000 0.007 0.063 0.041 0.000 0.000 0.112 NW 0.000 0.000 0.000 0.000 0.003 0.022 0.063 0.000 0.000 0.089 NNW 0.000 0.000 0.000 0.007 0.035 0.023 0.026 0.000 0.000 0.091 SUBTOTAL 0.000 0.000 0.086 0.703 0.681 0.639 0.172 0.000 0.000 2.281 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF GROUND LEVEL RELEASE 133.300 TOTAL HOURS OF STABILITY CLASS D 1165.920 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS D 50.180 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/10/14 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 109 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 1 OF 2 GROUND LEVEL RELEASE MODE JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.068 0.067 0.034 0.000 0.000 0.000 0.000 0.169 NNE 0.000 0.000 0.025 0.090 0.023 0.000 0.000 0.000 0.000 0.138 NE 0.000 0.000 0.004 0.019 0.011 0.000 0.000 0.000 0.000 0.034 ENE 0.000 0.000 0.009 0.055 0.005 0.000 0.000 0.000 0.000 0.069 E 0.000 0.000 0.041 0.148 0.012 0.000 0.000 0.000 0.000 0.201 ESE 0.000 0.000 0.052 0.065 0.013 0.000 0.000 0.000 0.000 0.130 SE 0.000 0.001 0.022 0.000 0.000 0.000 0.000 0.000 0.000 0.024 SSE 0.000 0.000 0.045 0.024 0.000 0.000 0.000 0.000 0.000 0.068 S 0.000 0.000 0.014 0.051 0.048 0.000 0.000 0.000 0.000 0.113 SSW 0.000 0.000 0.002 0.005 0.004 0.000 0.000 0.000 0.000 0.012 SW 0.000 0.000 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.005 WSW 0.000 0.000 0.000 0.000 0.006 0.000 0.000 0.000 0.000 0.006 W 0.000 0.000 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.005 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.005 0.015 0.000 0.000 0.000 0.000 0.020 NNW 0.000 0.000 0.004 0.042 0.026 0.028 0.010 0.000 0.000 0.109 SUBTOTAL 0.000 0.001 0.286 0.570 0.208 0.028 0.010 0.000 0.000 1.103 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF GROUND LEVEL RELEASE 133.300 TOTAL HOURS OF STABILITY CLASS E 611.040 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS E 24.270 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/10/14 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 110 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 1 OF 2 GROUND LEVEL RELEASE MODE JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.051 0.065 0.000 0.000 0.000 0.000 0.000 0.116 NNE 0.000 0.003 0.027 0.069 0.000 0.000 0.000 0.000 0.000 0.099 NE 0.000 0.000 0.009 0.006 0.000 0.000 0.000 0.000 0.000 0.015 ENE 0.000 0.000 0.005 0.025 0.000 0.000 0.000 0.000 0.000 0.030 E 0.000 0.005 0.012 0.040 0.000 0.000 0.000 0.000 0.000 0.056 ESE 0.000 0.000 0.011 0.015 0.000 0.000 0.000 0.000 0.000 0.026 SE 0.000 0.010 0.009 0.000 0.000 0.000 0.000 0.000 0.000 0.019 SSE 0.000 0.005 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.005 S 0.000 0.000 0.009 0.005 0.000 0.000 0.000 0.000 0.000 0.015 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.003 NNW 0.000 0.000 0.005 0.020 0.000 0.000 0.000 0.000 0.000 0.025 SUBTOTAL 0.000 0.023 0.142 0.245 0.000 0.000 0.000 0.000 0.000 0.410 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF GROUND LEVEL RELEASE 133.300 TOTAL HOURS OF STABILITY CLASS F 240.110 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS F 9.020 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/10/14 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 111 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 1 OF 2 GROUND LEVEL RELEASE MODE JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.060 0.130 0.006 0.000 0.000 0.000 0.000 0.196 NNE 0.000 0.000 0.023 0.056 0.000 0.000 0.000 0.000 0.000 0.079 NE 0.000 0.000 0.002 0.015 0.000 0.000 0.000 0.000 0.000 0.016 ENE 0.000 0.000 0.005 0.010 0.000 0.000 0.000 0.000 0.000 0.016 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.005 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.005 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.006 0.000 0.000 0.000 0.000 0.000 0.000 0.006 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.012 0.000 0.000 0.000 0.000 0.000 0.000 0.012 SUBTOTAL 0.000 0.005 0.108 0.211 0.006 0.000 0.000 0.000 0.000 0.330 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF GROUND LEVEL RELEASE 133.300 TOTAL HOURS OF STABILITY CLASS G 59.460 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS G 7.260 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/10/14 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 112 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 2 OF 2 ELEVATED RELEASE MODE JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF ELEVATED RELEASES 2066.700 TOTAL HOURS OF STABILITY CLASS A 24.920 TOTAL HOURS OF ELEVATED STABILITY CLASS A 0.000 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/10/14 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 113 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 2 OF 2 ELEVATED RELEASE MODE JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.038 0.000 0.000 0.038 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.077 0.112 0.000 0.000 0.189 SSE 0.000 0.000 0.000 0.045 0.043 0.000 0.000 0.000 0.000 0.088 S 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.045 SSW 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.045 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.042 0.000 0.000 0.000 0.000 0.042 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.111 0.000 0.000 0.111 SUBTOTAL 0.000 0.000 0.000 0.136 0.085 0.077 0.261 0.000 0.000 0.560 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF ELEVATED RELEASES 2066.700 TOTAL HOURS OF STABILITY CLASS B 21.380 TOTAL HOURS OF ELEVATED STABILITY CLASS B 12.310 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/10/14 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 114 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 2 OF 2 ELEVATED RELEASE MODE JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.315 0.037 0.000 0.000 0.352 NNE 0.000 0.000 0.000 0.000 0.000 0.159 0.000 0.000 0.000 0.159 NE 0.000 0.000 0.000 0.000 0.000 0.040 0.000 0.000 0.000 0.040 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.158 0.038 0.000 0.000 0.195 SE 0.000 0.000 0.000 0.091 0.000 0.237 0.075 0.051 0.000 0.453 SSE 0.000 0.000 0.045 0.045 0.045 0.124 0.000 0.000 0.000 0.260 S 0.000 0.000 0.000 0.091 0.045 0.079 0.000 0.000 0.000 0.215 SSW 0.000 0.000 0.091 0.227 0.000 0.079 0.000 0.000 0.000 0.397 SW 0.000 0.000 0.000 0.227 0.089 0.083 0.000 0.000 0.000 0.399 WSW 0.000 0.000 0.000 0.091 0.045 0.000 0.000 0.000 0.000 0.136 W 0.000 0.000 0.000 0.000 0.173 0.081 0.000 0.000 0.000 0.254 WNW 0.000 0.000 0.000 0.000 0.000 0.039 0.000 0.000 0.000 0.039 NW 0.000 0.000 0.000 0.000 0.000 0.120 0.036 0.025 0.000 0.180 NNW 0.000 0.000 0.000 0.000 0.000 0.039 0.000 0.000 0.000 0.039 SUBTOTAL 0.000 0.000 0.136 0.773 0.396 1.552 0.185 0.075 0.000 3.118 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF ELEVATED RELEASES 2066.700 TOTAL HOURS OF STABILITY CLASS C 77.170 TOTAL HOURS OF ELEVATED STABILITY CLASS C 68.590 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/10/14 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 115 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 2 OF 2 ELEVATED RELEASE MODE JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.045 0.227 1.088 0.968 0.037 0.000 0.000 2.365 NNE 0.000 0.000 0.091 0.682 0.961 1.012 0.037 0.000 0.000 2.783 NE 0.000 0.000 0.136 0.273 0.528 0.124 0.075 0.000 0.000 1.135 ENE 0.000 0.000 0.227 0.273 0.134 0.083 0.075 0.000 0.000 0.793 E 0.000 0.000 0.364 0.318 0.220 0.362 0.111 0.085 0.000 1.460 ESE 0.000 0.000 0.091 0.500 0.782 1.558 0.262 0.055 0.000 3.249 SE 0.000 0.000 0.773 1.500 1.227 1.824 0.853 0.142 0.000 6.319 SSE 0.000 0.045 1.500 1.136 0.871 1.560 0.483 0.027 0.000 5.623 S 0.000 0.000 1.136 1.545 1.540 1.917 0.817 0.070 0.000 7.026 SSW 0.000 0.000 1.136 1.273 1.184 0.958 0.480 0.000 0.000 5.032 SW 0.000 0.000 1.227 1.682 0.794 0.445 0.113 0.000 0.000 4.260 WSW 0.000 0.000 0.591 1.591 0.795 0.207 0.037 0.000 0.000 3.220 W 0.000 0.000 0.318 0.909 0.834 0.690 0.000 0.000 0.000 2.752 WNW 0.000 0.000 0.091 0.318 0.394 0.939 0.258 0.081 0.000 2.080 NW 0.000 0.000 0.091 0.227 0.349 0.396 0.222 0.155 0.000 1.440 NNW 0.000 0.045 0.045 0.136 0.178 0.520 0.224 0.028 0.000 1.178 SUBTOTAL 0.000 0.091 7.864 12.591 11.878 13.563 4.085 0.645 0.000 50.715 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF ELEVATED RELEASES 2066.700 TOTAL HOURS OF STABILITY CLASS D 1165.920 TOTAL HOURS OF ELEVATED STABILITY CLASS D 1115.740 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/10/14 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 116 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 2 OF 2 ELEVATED RELEASE MODE JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.045 0.227 0.227 0.658 0.723 0.111 0.000 0.000 1.992 NNE 0.000 0.000 0.136 0.727 0.610 0.923 0.113 0.000 0.000 2.510 NE 0.000 0.000 0.227 0.500 0.308 0.328 0.000 0.000 0.000 1.363 ENE 0.000 0.045 0.227 0.409 0.482 0.164 0.000 0.000 0.000 1.328 E 0.000 0.000 0.182 0.273 0.730 1.065 0.000 0.000 0.000 2.250 ESE 0.000 0.000 0.273 0.318 0.879 1.619 0.000 0.000 0.000 3.089 SE 0.000 0.000 0.455 0.818 0.832 0.691 0.037 0.000 0.000 2.833 SSE 0.000 0.000 0.545 1.091 0.974 0.489 0.000 0.000 0.000 3.099 S 0.000 0.000 0.455 0.682 0.395 0.765 0.224 0.000 0.000 2.520 SSW 0.000 0.045 0.318 0.091 0.175 0.483 0.075 0.000 0.000 1.187 SW 0.000 0.000 0.409 0.273 0.089 0.040 0.000 0.000 0.000 0.811 WSW 0.000 0.045 0.273 0.182 0.043 0.040 0.000 0.000 0.000 0.583 W 0.000 0.000 0.182 0.364 0.313 0.081 0.000 0.000 0.000 0.940 WNW 0.000 0.000 0.318 0.091 0.042 0.040 0.000 0.000 0.000 0.491 NW 0.000 0.000 0.091 0.227 0.133 0.279 0.000 0.000 0.000 0.730 NNW 0.000 0.091 0.136 0.045 0.131 0.398 0.145 0.000 0.000 0.946 SUBTOTAL 0.000 0.273 4.455 6.318 6.792 8.129 0.705 0.000 0.000 26.671 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF ELEVATED RELEASES 2066.700 TOTAL HOURS OF STABILITY CLASS E 611.040 TOTAL HOURS OF ELEVATED STABILITY CLASS E 586.770 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/10/14 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 117 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 2 OF 2 ELEVATED RELEASE MODE JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.136 0.136 0.175 0.844 0.000 0.000 0.000 1.291 NNE 0.000 0.000 0.091 0.045 0.396 0.557 0.038 0.000 0.000 1.127 NE 0.000 0.000 0.273 0.455 0.394 0.479 0.000 0.000 0.000 1.600 ENE 0.000 0.000 0.136 0.182 0.086 0.040 0.000 0.000 0.000 0.444 E 0.000 0.045 0.136 0.182 0.220 0.163 0.000 0.000 0.000 0.746 ESE 0.000 0.000 0.182 0.227 0.352 0.203 0.000 0.000 0.000 0.964 SE 0.000 0.045 0.273 0.773 0.314 0.000 0.000 0.000 0.000 1.405 SSE 0.000 0.000 0.136 0.182 0.000 0.000 0.000 0.000 0.000 0.318 S 0.000 0.091 0.500 0.227 0.000 0.320 0.000 0.000 0.000 1.139 SSW 0.000 0.000 0.182 0.045 0.043 0.040 0.000 0.000 0.000 0.310 SW 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.091 WSW 0.000 0.000 0.091 0.045 0.000 0.000 0.000 0.000 0.000 0.136 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.045 0.091 0.000 0.000 0.000 0.000 0.000 0.136 NW 0.000 0.045 0.045 0.045 0.042 0.000 0.000 0.000 0.000 0.179 NNW 0.000 0.000 0.136 0.045 0.042 0.281 0.113 0.000 0.000 0.618 SUBTOTAL 0.000 0.273 2.409 2.682 2.064 2.926 0.150 0.000 0.000 10.504 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF ELEVATED RELEASES 2066.700 TOTAL HOURS OF STABILITY CLASS F 240.110 TOTAL HOURS OF ELEVATED STABILITY CLASS F 231.090 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/10/14 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 118 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data PART 2 OF 2 ELEVATED RELEASE MODE JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.271 0.000 0.000 0.000 0.271 NNE 0.000 0.000 0.000 0.045 0.134 0.515 0.038 0.000 0.000 0.732 NE 0.000 0.000 0.045 0.091 0.131 0.209 0.000 0.000 0.000 0.477 ENE 0.000 0.000 0.000 0.091 0.090 0.042 0.000 0.000 0.000 0.222 E 0.000 0.045 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.091 ESE 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 SE 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 SSE 0.000 0.045 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.136 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.045 WSW 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.045 W 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.091 WNW 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.045 0.000 0.080 0.000 0.000 0.000 0.125 SUBTOTAL 0.000 0.182 0.318 0.364 0.355 1.116 0.038 0.000 0.000 2.373 TOTAL HOURS OF VALID OBSERVATIONS 2200.000 TOTAL HOURS OF ELEVATED RELEASES 2066.700 TOTAL HOURS OF STABILITY CLASS G 59.460 TOTAL HOURS OF ELEVATED STABILITY CLASS G 52.200 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2021/10/14 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 119 of 165 Table 7-D Split Level Releases - 4th Quarter JFD Joint Frequency Distribution In Percent (Ground Level Release Mode And Elevated Release Mode)

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 120 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.004 0.051 0.015 0.000 0.000 0.070 NNE 0.000 0.000 0.000 0.000 0.004 0.013 0.000 0.000 0.000 0.017 NE 0.000 0.000 0.000 0.000 0.000 0.006 0.000 0.000 0.000 0.006 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.002 0.000 0.000 0.000 0.000 0.000 0.002 SE 0.000 0.000 0.000 0.014 0.027 0.015 0.000 0.000 0.000 0.056 SSE 0.000 0.000 0.000 0.026 0.000 0.009 0.000 0.000 0.000 0.035 S 0.000 0.000 0.000 0.011 0.022 0.067 0.000 0.000 0.000 0.100 SSW 0.000 0.000 0.000 0.003 0.026 0.007 0.000 0.000 0.000 0.037 SW 0.000 0.000 0.000 0.008 0.004 0.008 0.000 0.000 0.000 0.020 WSW 0.000 0.000 0.000 0.000 0.000 0.006 0.000 0.000 0.000 0.006 W 0.000 0.000 0.000 0.000 0.009 0.032 0.000 0.000 0.000 0.042 WNW 0.000 0.000 0.000 0.000 0.000 0.033 0.000 0.000 0.000 0.033 NW 0.000 0.000 0.000 0.000 0.004 0.013 0.000 0.000 0.000 0.017 NNW 0.000 0.000 0.000 0.000 0.018 0.078 0.049 0.000 0.000 0.145 SUBTOTAL 0.000 0.000 0.000 0.064 0.119 0.339 0.064 0.000 0.000 0.585 TOTAL HOURS OF VALID OBSERVATIONS 2134.000 TOTAL HOURS OF GROUND LEVEL RELEASE 231.340 TOTAL HOURS OF STABILITY CLASS A 12.490 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS A 12.490 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2022/01/26 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 121 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.043 0.000 0.000 0.000 0.043 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.008 0.000 0.000 0.000 0.000 0.008 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.009 0.012 0.046 0.000 0.000 0.000 0.067 SSE 0.000 0.000 0.000 0.012 0.007 0.000 0.000 0.000 0.000 0.019 S 0.000 0.000 0.000 0.003 0.000 0.009 0.000 0.000 0.000 0.012 SSW 0.000 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.003 SW 0.000 0.000 0.000 0.002 0.000 0.000 0.000 0.000 0.000 0.002 WSW 0.000 0.000 0.000 0.002 0.000 0.007 0.000 0.000 0.000 0.008 W 0.000 0.000 0.000 0.001 0.010 0.014 0.000 0.000 0.000 0.025 WNW 0.000 0.000 0.000 0.000 0.004 0.023 0.000 0.000 0.000 0.028 NW 0.000 0.000 0.000 0.000 0.008 0.027 0.000 0.000 0.000 0.035 NNW 0.000 0.000 0.000 0.000 0.004 0.030 0.000 0.000 0.000 0.034 SUBTOTAL 0.000 0.000 0.000 0.031 0.054 0.199 0.000 0.000 0.000 0.284 TOTAL HOURS OF VALID OBSERVATIONS 2134.000 TOTAL HOURS OF GROUND LEVEL RELEASE 231.340 TOTAL HOURS OF STABILITY CLASS B 7.860 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS B 6.060 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2022/01/26 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 122 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.008 0.047 0.000 0.000 0.000 0.056 NNE 0.000 0.000 0.000 0.002 0.009 0.000 0.000 0.000 0.000 0.011 NE 0.000 0.000 0.000 0.000 0.000 0.007 0.000 0.000 0.000 0.007 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.012 0.000 0.000 0.000 0.000 0.012 SE 0.000 0.000 0.000 0.018 0.026 0.009 0.000 0.000 0.000 0.053 SSE 0.000 0.000 0.000 0.000 0.007 0.000 0.000 0.000 0.000 0.007 S 0.000 0.000 0.000 0.000 0.017 0.063 0.000 0.000 0.000 0.080 SSW 0.000 0.000 0.000 0.000 0.004 0.010 0.000 0.000 0.000 0.015 SW 0.000 0.000 0.000 0.000 0.006 0.008 0.000 0.000 0.000 0.014 WSW 0.000 0.000 0.000 0.004 0.000 0.000 0.000 0.000 0.000 0.004 W 0.000 0.000 0.000 0.000 0.001 0.029 0.000 0.000 0.000 0.030 WNW 0.000 0.000 0.000 0.001 0.000 0.011 0.011 0.000 0.000 0.024 NW 0.000 0.000 0.000 0.000 0.010 0.007 0.010 0.000 0.000 0.027 NNW 0.000 0.000 0.000 0.000 0.010 0.031 0.000 0.000 0.000 0.041 SUBTOTAL 0.000 0.000 0.000 0.027 0.112 0.222 0.021 0.000 0.000 0.381 TOTAL HOURS OF VALID OBSERVATIONS 2134.000 TOTAL HOURS OF GROUND LEVEL RELEASE 231.340 TOTAL HOURS OF STABILITY CLASS C 26.650 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS C 8.130 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2022/01/26 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 123 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.029 0.032 0.166 0.000 0.000 0.000 0.227 NNE 0.000 0.000 0.000 0.032 0.064 0.041 0.000 0.000 0.000 0.136 NE 0.000 0.000 0.000 0.006 0.032 0.006 0.000 0.000 0.000 0.044 ENE 0.000 0.000 0.001 0.001 0.014 0.000 0.000 0.000 0.000 0.016 E 0.000 0.000 0.000 0.015 0.000 0.000 0.000 0.000 0.000 0.015 ESE 0.000 0.000 0.000 0.029 0.018 0.000 0.000 0.000 0.000 0.046 SE 0.000 0.000 0.006 0.067 0.070 0.254 0.094 0.000 0.000 0.489 SSE 0.000 0.000 0.016 0.091 0.083 0.020 0.000 0.000 0.000 0.210 S 0.000 0.000 0.009 0.078 0.104 0.368 0.055 0.000 0.000 0.614 SSW 0.000 0.000 0.000 0.015 0.050 0.202 0.102 0.000 0.000 0.369 SW 0.000 0.000 0.000 0.013 0.044 0.039 0.000 0.000 0.000 0.096 WSW 0.000 0.000 0.000 0.002 0.026 0.016 0.000 0.000 0.000 0.045 W 0.000 0.000 0.000 0.007 0.030 0.096 0.009 0.000 0.000 0.142 WNW 0.000 0.000 0.000 0.000 0.035 0.123 0.102 0.000 0.000 0.260 NW 0.000 0.000 0.000 0.000 0.055 0.103 0.147 0.000 0.000 0.306 NNW 0.000 0.000 0.000 0.009 0.023 0.178 0.056 0.000 0.000 0.267 SUBTOTAL 0.000 0.000 0.032 0.395 0.680 1.611 0.565 0.000 0.000 3.283 TOTAL HOURS OF VALID OBSERVATIONS 2134.000 TOTAL HOURS OF GROUND LEVEL RELEASE 231.340 TOTAL HOURS OF STABILITY CLASS D 811.160 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS D 70.050 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2022/01/26 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 124 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.008 0.068 0.060 0.009 0.000 0.000 0.000 0.146 NNE 0.000 0.000 0.014 0.103 0.032 0.000 0.000 0.000 0.000 0.149 NE 0.000 0.000 0.000 0.019 0.035 0.023 0.000 0.000 0.000 0.077 ENE 0.000 0.002 0.002 0.031 0.000 0.000 0.000 0.000 0.000 0.035 E 0.000 0.000 0.012 0.028 0.000 0.000 0.000 0.000 0.000 0.040 ESE 0.000 0.000 0.053 0.147 0.060 0.017 0.000 0.000 0.000 0.278 SE 0.000 0.000 0.044 0.056 0.136 0.075 0.000 0.000 0.000 0.312 SSE 0.000 0.000 0.066 0.137 0.221 0.189 0.000 0.000 0.000 0.613 S 0.000 0.000 0.010 0.091 0.119 0.422 0.454 0.181 0.000 1.277 SSW 0.000 0.000 0.006 0.018 0.082 0.353 0.238 0.000 0.000 0.698 SW 0.000 0.000 0.002 0.009 0.000 0.102 0.059 0.000 0.000 0.172 WSW 0.000 0.000 0.000 0.004 0.012 0.000 0.000 0.000 0.000 0.015 W 0.000 0.000 0.001 0.047 0.015 0.016 0.000 0.000 0.000 0.079 WNW 0.000 0.000 0.000 0.000 0.018 0.007 0.000 0.000 0.000 0.024 NW 0.000 0.000 0.004 0.021 0.025 0.079 0.027 0.000 0.000 0.156 NNW 0.000 0.000 0.009 0.026 0.083 0.047 0.010 0.000 0.000 0.176 SUBTOTAL 0.000 0.002 0.232 0.806 0.899 1.340 0.787 0.181 0.000 4.247 TOTAL HOURS OF VALID OBSERVATIONS 2134.000 TOTAL HOURS OF GROUND LEVEL RELEASE 231.340 TOTAL HOURS OF STABILITY CLASS E 861.850 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS E 90.630 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2022/01/26 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 125 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.067 0.102 0.025 0.000 0.000 0.000 0.000 0.193 NNE 0.000 0.000 0.012 0.076 0.022 0.000 0.000 0.000 0.000 0.110 NE 0.000 0.000 0.004 0.005 0.007 0.000 0.000 0.000 0.000 0.016 ENE 0.000 0.000 0.007 0.007 0.000 0.000 0.000 0.000 0.000 0.014 E 0.000 0.005 0.045 0.052 0.000 0.000 0.000 0.000 0.000 0.101 ESE 0.000 0.012 0.032 0.057 0.007 0.000 0.000 0.000 0.000 0.108 SE 0.000 0.005 0.088 0.060 0.008 0.034 0.000 0.000 0.000 0.195 SSE 0.000 0.000 0.052 0.054 0.058 0.091 0.000 0.000 0.000 0.256 S 0.000 0.000 0.024 0.038 0.071 0.139 0.115 0.000 0.000 0.387 SSW 0.000 0.000 0.003 0.024 0.000 0.008 0.000 0.000 0.000 0.036 SW 0.000 0.000 0.008 0.000 0.000 0.000 0.000 0.000 0.000 0.008 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.001 0.017 0.007 0.000 0.000 0.000 0.000 0.026 NNW 0.000 0.000 0.021 0.075 0.044 0.000 0.000 0.000 0.000 0.139 SUBTOTAL 0.000 0.022 0.364 0.567 0.249 0.272 0.115 0.000 0.000 1.590 TOTAL HOURS OF VALID OBSERVATIONS 2134.000 TOTAL HOURS OF GROUND LEVEL RELEASE 231.340 TOTAL HOURS OF STABILITY CLASS F 308.070 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS F 33.930 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2022/01/26 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 126 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.071 0.169 0.000 0.000 0.000 0.000 0.000 0.239 NNE 0.000 0.000 0.003 0.049 0.000 0.000 0.000 0.000 0.000 0.052 NE 0.000 0.000 0.006 0.000 0.000 0.000 0.000 0.000 0.000 0.006 ENE 0.000 0.005 0.011 0.004 0.000 0.000 0.000 0.000 0.000 0.020 E 0.000 0.000 0.030 0.002 0.000 0.000 0.000 0.000 0.000 0.032 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.004 0.012 0.010 0.000 0.000 0.000 0.000 0.000 0.026 SSE 0.000 0.000 0.012 0.015 0.017 0.000 0.000 0.000 0.000 0.045 S 0.000 0.000 0.000 0.000 0.008 0.000 0.000 0.000 0.000 0.008 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.002 0.040 0.000 0.000 0.000 0.000 0.000 0.042 SUBTOTAL 0.000 0.009 0.146 0.290 0.026 0.000 0.000 0.000 0.000 0.471 TOTAL HOURS OF VALID OBSERVATIONS 2134.000 TOTAL HOURS OF GROUND LEVEL RELEASE 231.340 TOTAL HOURS OF STABILITY CLASS G 105.920 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS G 10.050 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.50 METER LEVEL WIND SPEED MEASURED AT 10.50 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2022/01/26 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 127 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 TOTAL HOURS OF VALID OBSERVATIONS 2134.000 TOTAL HOURS OF ELEVATED RELEASES 1902.660 TOTAL HOURS OF STABILITY CLASS A 12.490 TOTAL HOURS OF ELEVATED STABILITY CLASS A 0.000 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2022/01/26 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 128 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.084 0.000 0.000 0.000 0.084 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.000 0.084 0.000 0.000 0.000 0.084 TOTAL HOURS OF VALID OBSERVATIONS 2134.000 TOTAL HOURS OF ELEVATED RELEASES 1902.660 TOTAL HOURS OF STABILITY CLASS B 7.860 TOTAL HOURS OF ELEVATED STABILITY CLASS B 1.800 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2022/01/26 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 129 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.200 0.039 0.067 0.000 0.306 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.044 0.000 0.000 0.032 0.000 0.075 SSE 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.045 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.168 0.000 0.000 0.000 0.168 SW 0.000 0.000 0.000 0.000 0.000 0.043 0.000 0.000 0.000 0.043 WSW 0.000 0.000 0.000 0.000 0.000 0.041 0.000 0.000 0.000 0.041 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.189 0.000 0.000 0.189 SUBTOTAL 0.000 0.000 0.000 0.000 0.089 0.451 0.228 0.099 0.000 0.868 TOTAL HOURS OF VALID OBSERVATIONS 2134.000 TOTAL HOURS OF ELEVATED RELEASES 1902.660 TOTAL HOURS OF STABILITY CLASS C 26.650 TOTAL HOURS OF ELEVATED STABILITY CLASS C 18.520 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2022/01/26 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 130 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.187 0.000 0.089 1.224 1.187 0.000 0.000 2.687 NNE 0.000 0.000 0.047 0.234 0.582 1.256 0.039 0.000 0.000 2.157 NE 0.000 0.000 0.047 0.281 0.273 0.125 0.000 0.000 0.000 0.725 ENE 0.000 0.000 0.047 0.328 0.136 0.043 0.000 0.000 0.000 0.554 E 0.000 0.000 0.141 0.094 0.229 0.000 0.000 0.000 0.000 0.463 ESE 0.000 0.000 0.187 0.562 0.685 0.506 0.077 0.000 0.000 2.017 SE 0.000 0.000 0.328 0.890 0.899 0.940 0.346 0.128 0.011 3.542 SSE 0.000 0.000 0.281 0.422 0.581 0.951 0.835 0.159 0.000 3.228 S 0.000 0.000 0.328 0.328 0.414 1.143 1.409 0.203 0.000 3.825 SSW 0.000 0.047 0.234 0.515 0.452 0.733 0.908 0.280 0.000 3.170 SW 0.000 0.000 0.281 0.422 0.271 0.665 0.155 0.000 0.000 1.794 WSW 0.000 0.094 0.094 0.328 0.270 0.321 0.038 0.000 0.000 1.145 W 0.000 0.000 0.047 0.375 0.717 0.805 0.423 0.000 0.000 2.366 WNW 0.000 0.000 0.000 0.281 0.357 1.283 0.307 0.168 0.000 2.396 NW 0.000 0.000 0.000 0.187 0.591 0.538 0.648 0.208 0.000 2.172 NNW 0.000 0.000 0.141 0.047 0.366 0.987 0.841 0.105 0.000 2.487 SUBTOTAL 0.000 0.141 2.390 5.295 6.911 11.518 7.212 1.251 0.011 34.729 TOTAL HOURS OF VALID OBSERVATIONS 2134.000 TOTAL HOURS OF ELEVATED RELEASES 1902.660 TOTAL HOURS OF STABILITY CLASS D 811.160 TOTAL HOURS OF ELEVATED STABILITY CLASS D 741.110 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2022/01/26 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 131 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.047 0.328 0.814 0.737 0.231 0.000 0.000 2.157 NNE 0.000 0.000 0.141 0.047 0.534 1.408 0.000 0.000 0.000 2.129 NE 0.000 0.000 0.000 0.375 0.503 0.369 0.000 0.000 0.000 1.247 ENE 0.000 0.047 0.047 0.187 0.269 0.251 0.000 0.000 0.000 0.801 E 0.000 0.000 0.094 0.187 0.451 0.213 0.000 0.000 0.000 0.945 ESE 0.000 0.000 0.281 0.562 0.446 0.907 0.231 0.000 0.000 2.427 SE 0.000 0.047 0.281 0.515 0.773 1.765 1.101 0.087 0.000 4.568 SSE 0.000 0.000 0.281 0.890 0.762 1.381 1.608 0.233 0.000 5.156 S 0.000 0.047 0.234 0.656 0.450 1.674 2.364 0.518 0.023 5.967 SSW 0.000 0.094 0.187 0.469 0.404 1.058 1.299 0.275 0.009 3.796 SW 0.000 0.000 0.234 0.422 0.139 0.450 0.418 0.104 0.004 1.770 WSW 0.000 0.000 0.094 0.234 0.141 0.043 0.000 0.000 0.000 0.512 W 0.000 0.000 0.094 0.141 0.448 0.379 0.000 0.000 0.000 1.061 WNW 0.000 0.000 0.187 0.094 0.136 0.203 0.038 0.000 0.000 0.659 NW 0.000 0.000 0.047 0.141 0.222 0.654 0.269 0.000 0.000 1.332 NNW 0.000 0.000 0.094 0.094 0.134 1.019 0.270 0.000 0.000 1.611 SUBTOTAL 0.000 0.234 2.343 5.342 6.627 12.513 7.828 1.217 0.037 36.140 TOTAL HOURS OF VALID OBSERVATIONS 2134.000 TOTAL HOURS OF ELEVATED RELEASES 1902.660 TOTAL HOURS OF STABILITY CLASS E 861.850 TOTAL HOURS OF ELEVATED STABILITY CLASS E 771.220 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2022/01/26 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 132 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.779 0.038 0.000 0.000 0.817 NNE 0.000 0.000 0.047 0.000 0.046 0.652 0.000 0.000 0.000 0.746 NE 0.000 0.000 0.047 0.000 0.092 0.335 0.039 0.000 0.000 0.513 ENE 0.000 0.000 0.047 0.141 0.044 0.039 0.000 0.000 0.000 0.271 E 0.000 0.000 0.094 0.094 0.047 0.044 0.000 0.000 0.000 0.278 ESE 0.000 0.047 0.187 0.281 0.541 0.376 0.000 0.000 0.000 1.433 SE 0.000 0.047 0.422 0.843 1.088 1.003 0.039 0.000 0.000 3.442 SSE 0.000 0.000 0.187 0.234 0.316 0.370 0.153 0.000 0.000 1.261 S 0.000 0.094 0.141 0.328 0.453 0.380 0.077 0.000 0.000 1.472 SSW 0.000 0.000 0.047 0.375 0.137 0.000 0.000 0.000 0.000 0.559 SW 0.000 0.047 0.187 0.187 0.138 0.043 0.000 0.000 0.000 0.602 WSW 0.000 0.047 0.187 0.000 0.000 0.000 0.000 0.000 0.000 0.234 W 0.000 0.000 0.094 0.047 0.000 0.000 0.000 0.000 0.000 0.141 WNW 0.000 0.094 0.141 0.000 0.000 0.000 0.000 0.000 0.000 0.234 NW 0.000 0.000 0.047 0.094 0.000 0.119 0.000 0.000 0.000 0.260 NNW 0.000 0.000 0.047 0.094 0.000 0.403 0.039 0.000 0.000 0.583 SUBTOTAL 0.000 0.375 1.921 2.718 2.903 4.544 0.386 0.000 0.000 12.846 TOTAL HOURS OF VALID OBSERVATIONS 2134.000 TOTAL HOURS OF ELEVATED RELEASES 1902.660 TOTAL HOURS OF STABILITY CLASS F 308.070 TOTAL HOURS OF ELEVATED STABILITY CLASS F 274.140 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2022/01/26 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 133 of 165 SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.047 0.047 0.135 0.762 0.078 0.000 0.000 1.068 NNE 0.000 0.000 0.094 0.047 0.223 0.040 0.000 0.000 0.000 0.403 NE 0.000 0.000 0.047 0.000 0.045 0.042 0.000 0.000 0.000 0.133 ENE 0.000 0.000 0.047 0.000 0.090 0.000 0.000 0.000 0.000 0.136 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.047 0.187 0.141 0.093 0.043 0.000 0.000 0.000 0.510 SE 0.000 0.047 0.328 0.094 0.499 0.044 0.000 0.000 0.000 1.011 SSE 0.000 0.000 0.094 0.141 0.183 0.000 0.000 0.000 0.000 0.417 S 0.000 0.000 0.047 0.094 0.045 0.000 0.000 0.000 0.000 0.186 SSW 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 SW 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 WSW 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.094 NW 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 NNW 0.000 0.000 0.047 0.094 0.045 0.121 0.039 0.000 0.000 0.346 SUBTOTAL 0.000 0.094 1.218 0.656 1.357 1.051 0.117 0.000 0.000 4.493 TOTAL HOURS OF VALID OBSERVATIONS 2134.000 TOTAL HOURS OF ELEVATED RELEASES 1902.660 TOTAL HOURS OF STABILITY CLASS G 105.920 TOTAL HOURS OF ELEVATED STABILITY CLASS G 95.870 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.74 METER LEVEL WIND SPEED MEASURED AT 45.74 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 2022/01/26 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.055 0.000 0.055 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.055 0.000 0.000 0.000 0.000 0.055 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.055 0.000 0.000 0.055 0.000 0.111 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2148 TOTAL HOURS OF STABILITY CLASS A 2 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 2 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1808 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/04/21 MEAN WIND SPEED = 12.55 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.055 0.055 0.000 0.000 0.111 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.055 0.000 0.000 0.055 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.055 0.111 0.000 0.000 0.000 0.166 SSE 0.000 0.000 0.000 0.000 0.055 0.055 0.000 0.000 0.000 0.111 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.111 0.000 0.000 0.111 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.055 0.000 0.000 0.055 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.111 0.221 0.277 0.000 0.000 0.608 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2148 TOTAL HOURS OF STABILITY CLASS B 11 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 11 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1808 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/04/21 MEAN WIND SPEED = 12.02 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.221 0.111 0.000 0.000 0.332 NNE 0.000 0.000 0.000 0.000 0.000 0.055 0.387 0.000 0.000 0.442 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.055 0.055 0.000 0.111 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.055 0.055 0.000 0.055 0.000 0.166 SE 0.000 0.000 0.000 0.000 0.055 0.000 0.055 0.000 0.000 0.111 SSE 0.000 0.000 0.000 0.000 0.055 0.000 0.000 0.000 0.000 0.055 S 0.000 0.000 0.000 0.000 0.055 0.000 0.000 0.000 0.000 0.055 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.111 0.000 0.000 0.111 SW 0.000 0.000 0.000 0.000 0.000 0.111 0.055 0.000 0.000 0.166 WSW 0.000 0.000 0.000 0.000 0.000 0.055 0.111 0.055 0.000 0.221 W 0.000 0.000 0.000 0.000 0.000 0.000 0.111 0.000 0.000 0.111 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.055 0.000 0.000 0.055 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.055 0.000 0.055 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.111 0.000 0.000 0.111 SUBTOTAL 0.000 0.000 0.000 0.000 0.221 0.498 1.162 0.221 0.000 2.102 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2148 TOTAL HOURS OF STABILITY CLASS C 45 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 38 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1808 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/04/21 MEAN WIND SPEED = 13.88 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.055 0.111 0.332 1.936 1.327 0.332 0.000 4.093 NNE 0.000 0.000 0.000 0.387 0.719 2.765 1.327 0.277 0.000 5.476 NE 0.000 0.000 0.111 0.277 0.277 1.438 0.166 0.166 0.000 2.434 ENE 0.000 0.000 0.111 0.332 0.442 0.608 0.055 0.000 0.000 1.549 E 0.000 0.000 0.055 0.111 0.332 0.498 0.553 0.055 0.000 1.604 ESE 0.000 0.000 0.111 0.498 0.332 0.885 0.774 0.332 0.055 2.987 SE 0.000 0.000 0.166 0.332 0.221 0.387 0.885 0.277 0.221 2.489 SSE 0.000 0.000 0.055 0.221 0.166 0.277 0.111 0.055 0.000 0.885 S 0.000 0.000 0.166 0.055 0.055 0.553 0.608 0.498 0.000 1.936 SSW 0.000 0.000 0.111 0.221 0.166 0.664 0.498 0.000 0.000 1.659 SW 0.000 0.000 0.166 0.111 0.277 0.553 0.166 0.055 0.000 1.327 WSW 0.000 0.000 0.166 0.442 0.442 0.442 0.608 0.442 0.000 2.544 W 0.000 0.000 0.166 0.553 0.442 1.383 1.991 1.217 0.000 5.752 WNW 0.000 0.000 0.166 0.387 0.442 1.272 0.940 0.442 0.166 3.816 NW 0.000 0.000 0.221 0.277 0.221 1.051 0.830 2.212 0.498 5.310 NNW 0.000 0.055 0.277 0.221 0.166 1.106 1.715 0.442 0.000 3.982 SUBTOTAL 0.000 0.055 2.102 4.535 5.033 15.819 12.555 6.803 0.940 47.843 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2148 TOTAL HOURS OF STABILITY CLASS D 1091 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 865 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1808 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/04/21 MEAN WIND SPEED = 11.96 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.055 0.000 0.055 0.498 0.664 0.000 0.000 1.272 NNE 0.000 0.000 0.055 0.166 0.055 1.549 0.885 0.111 0.000 2.821 NE 0.000 0.000 0.111 0.000 0.221 0.996 0.774 0.000 0.000 2.102 ENE 0.000 0.000 0.055 0.111 0.166 0.277 0.332 0.000 0.000 0.940 E 0.000 0.000 0.000 0.221 0.055 0.277 0.553 0.055 0.000 1.162 ESE 0.000 0.000 0.000 0.111 0.111 0.387 0.830 0.387 0.055 1.881 SE 0.000 0.000 0.000 0.221 0.166 0.885 1.936 0.664 0.498 4.369 SSE 0.000 0.000 0.000 0.055 0.000 0.830 1.604 0.498 0.442 3.429 S 0.000 0.055 0.055 0.055 0.055 0.996 2.102 1.936 0.885 6.139 SSW 0.000 0.000 0.055 0.111 0.166 0.830 0.719 0.996 0.664 3.540 SW 0.000 0.000 0.221 0.055 0.166 0.830 0.332 0.055 0.000 1.659 WSW 0.000 0.000 0.111 0.221 0.332 0.719 0.387 0.221 0.055 2.046 W 0.000 0.000 0.000 0.111 0.055 0.664 0.553 0.221 0.000 1.604 WNW 0.000 0.000 0.111 0.055 0.166 0.332 0.221 0.000 0.000 0.885 NW 0.000 0.000 0.000 0.111 0.055 0.442 0.221 0.055 0.000 0.885 NNW 0.000 0.055 0.055 0.000 0.111 0.332 0.498 0.055 0.000 1.106 SUBTOTAL 0.000 0.111 0.885 1.604 1.936 10.841 12.611 5.254 2.600 35.841 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2148 TOTAL HOURS OF STABILITY CLASS E 723 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 648 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1808 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/04/21 MEAN WIND SPEED = 14.15 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.055 0.000 0.055 0.166 0.000 0.000 0.277 NNE 0.000 0.000 0.000 0.000 0.055 0.166 0.664 0.000 0.000 0.885 NE 0.000 0.000 0.000 0.000 0.055 0.332 0.221 0.000 0.000 0.608 ENE 0.000 0.000 0.000 0.000 0.111 0.111 0.166 0.000 0.000 0.387 E 0.000 0.000 0.000 0.000 0.166 0.111 0.000 0.000 0.000 0.277 ESE 0.000 0.000 0.111 0.000 0.055 0.111 0.055 0.000 0.000 0.332 SE 0.000 0.000 0.000 0.055 0.000 0.111 0.277 0.000 0.000 0.442 SSE 0.000 0.000 0.055 0.111 0.055 0.608 1.051 0.277 0.111 2.268 S 0.000 0.000 0.000 0.166 0.111 0.442 0.608 0.608 0.111 2.046 SSW 0.000 0.000 0.111 0.166 0.000 0.166 0.498 0.000 0.000 0.940 SW 0.000 0.000 0.000 0.000 0.055 0.277 0.055 0.000 0.000 0.387 WSW 0.000 0.000 0.111 0.111 0.000 0.111 0.055 0.000 0.000 0.387 W 0.000 0.000 0.111 0.055 0.111 0.055 0.055 0.000 0.000 0.387 WNW 0.000 0.000 0.000 0.055 0.000 0.000 0.000 0.000 0.000 0.055 NW 0.000 0.000 0.055 0.055 0.000 0.111 0.000 0.000 0.000 0.221 NNW 0.000 0.000 0.000 0.000 0.055 0.166 0.000 0.000 0.000 0.221 SUBTOTAL 0.000 0.000 0.553 0.830 0.830 2.931 3.872 0.885 0.221 10.122 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2148 TOTAL HOURS OF STABILITY CLASS F 212 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 183 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1808 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/04/21 MEAN WIND SPEED = 12.27 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JAN 1, 2021 - MAR 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.055 0.000 0.000 0.000 0.055 NE 0.000 0.000 0.055 0.000 0.000 0.166 0.166 0.000 0.000 0.387 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.055 0.055 0.055 0.111 0.000 0.000 0.000 0.277 ESE 0.000 0.000 0.055 0.000 0.000 0.055 0.055 0.000 0.000 0.166 SE 0.000 0.000 0.055 0.055 0.000 0.111 0.111 0.000 0.000 0.332 SSE 0.000 0.000 0.000 0.055 0.221 0.055 0.055 0.000 0.000 0.387 S 0.000 0.000 0.000 0.055 0.055 0.277 0.166 0.000 0.000 0.553 SSW 0.000 0.000 0.000 0.055 0.000 0.166 0.221 0.000 0.000 0.442 SW 0.000 0.000 0.055 0.000 0.000 0.166 0.000 0.000 0.000 0.221 WSW 0.000 0.000 0.000 0.055 0.000 0.000 0.000 0.000 0.000 0.055 W 0.000 0.000 0.111 0.000 0.000 0.000 0.000 0.000 0.000 0.111 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.111 0.000 0.000 0.000 0.111 NNW 0.000 0.000 0.000 0.055 0.000 0.221 0.000 0.000 0.000 0.277 SUBTOTAL 0.000 0.000 0.387 0.387 0.332 1.493 0.774 0.000 0.000 3.374 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2148 TOTAL HOURS OF STABILITY CLASS G 64 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 61 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1808 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/04/21 MEAN WIND SPEED = 9.44 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.052 0.052 0.000 0.000 0.104 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.052 0.052 0.000 0.000 0.104 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.000 0.104 0.104 0.000 0.000 0.208 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS A 4 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 4 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1921 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/07/20 MEAN WIND SPEED = 12.83 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.052 0.052 0.000 0.000 0.104 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.052 0.052 0.000 0.052 0.000 0.156 SSE 0.000 0.000 0.000 0.000 0.052 0.052 0.052 0.000 0.000 0.156 S 0.000 0.000 0.000 0.000 0.052 0.000 0.000 0.000 0.000 0.052 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.052 0.000 0.000 0.000 0.052 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.052 0.000 0.000 0.052 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.052 0.000 0.000 0.052 SUBTOTAL 0.000 0.000 0.000 0.000 0.156 0.208 0.208 0.052 0.000 0.625 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS B 16 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 12 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1921 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/07/20 MEAN WIND SPEED = 11.78 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.104 0.208 0.000 0.000 0.312 NNE 0.000 0.000 0.000 0.000 0.000 0.052 0.260 0.000 0.000 0.312 NE 0.000 0.000 0.000 0.000 0.000 0.104 0.000 0.000 0.000 0.104 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.052 0.104 0.000 0.000 0.000 0.156 SE 0.000 0.000 0.000 0.000 0.052 0.260 0.156 0.208 0.052 0.729 SSE 0.000 0.000 0.000 0.052 0.208 0.156 0.156 0.104 0.000 0.677 S 0.000 0.000 0.000 0.000 0.052 0.260 0.052 0.000 0.000 0.364 SSW 0.000 0.000 0.000 0.104 0.000 0.000 0.000 0.000 0.000 0.104 SW 0.000 0.000 0.000 0.000 0.052 0.156 0.000 0.000 0.000 0.208 WSW 0.000 0.000 0.000 0.000 0.000 0.052 0.000 0.000 0.000 0.052 W 0.000 0.000 0.000 0.000 0.052 0.104 0.364 0.052 0.000 0.573 WNW 0.000 0.000 0.000 0.000 0.000 0.052 0.052 0.000 0.000 0.104 NW 0.000 0.000 0.000 0.000 0.000 0.052 0.052 0.000 0.000 0.104 NNW 0.000 0.000 0.000 0.000 0.000 0.052 0.156 0.000 0.000 0.208 SUBTOTAL 0.000 0.000 0.000 0.156 0.469 1.510 1.458 0.364 0.052 4.008 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS C 85 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 77 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1921 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/07/20 MEAN WIND SPEED = 12.36 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.052 0.312 0.104 1.406 1.145 0.000 0.000 3.019 NNE 0.000 0.000 0.052 0.208 0.521 1.301 0.677 0.104 0.000 2.863 NE 0.000 0.000 0.104 0.052 0.052 0.521 0.104 0.000 0.000 0.833 ENE 0.000 0.000 0.052 0.208 0.156 0.156 0.052 0.000 0.000 0.625 E 0.000 0.000 0.156 0.052 0.000 0.156 0.156 0.000 0.000 0.521 ESE 0.000 0.052 0.312 0.364 0.521 0.885 0.521 0.885 0.364 3.904 SE 0.000 0.000 0.156 0.781 0.573 2.030 1.770 1.822 0.364 7.496 SSE 0.000 0.000 0.260 0.781 0.469 1.145 2.655 0.885 0.000 6.195 S 0.000 0.000 0.469 0.364 0.833 2.030 1.614 0.521 0.052 5.882 SSW 0.000 0.000 0.156 0.156 0.625 1.614 1.041 0.781 0.000 4.373 SW 0.000 0.000 0.208 0.208 0.364 1.770 1.145 0.260 0.000 3.956 WSW 0.000 0.000 0.208 0.573 0.521 1.249 0.937 0.052 0.000 3.540 W 0.000 0.000 0.156 0.573 1.145 1.353 0.469 0.156 0.000 3.852 WNW 0.000 0.000 0.052 0.260 0.729 2.186 0.729 0.052 0.052 4.060 NW 0.000 0.000 0.156 0.312 0.469 1.197 0.521 0.312 0.156 3.123 NNW 0.000 0.000 0.052 0.052 0.208 1.458 1.718 0.208 0.052 3.748 SUBTOTAL 0.000 0.052 2.603 5.258 7.288 20.458 15.252 6.039 1.041 57.991 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS D 1201 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 1114 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1921 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/07/20 MEAN WIND SPEED = 11.44 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.104 0.312 0.416 1.197 0.000 0.000 2.030 NNE 0.000 0.000 0.000 0.000 0.104 0.521 0.573 0.000 0.000 1.197 NE 0.000 0.000 0.000 0.156 0.156 0.364 0.260 0.052 0.000 0.989 ENE 0.000 0.000 0.052 0.000 0.156 0.104 0.312 0.052 0.000 0.677 E 0.000 0.000 0.104 0.000 0.000 0.104 0.000 0.000 0.000 0.208 ESE 0.000 0.000 0.052 0.156 0.104 0.104 1.249 0.416 0.000 2.082 SE 0.000 0.000 0.052 0.208 0.260 1.197 1.197 0.260 0.052 3.227 SSE 0.000 0.000 0.000 0.156 0.208 0.573 1.353 0.312 0.052 2.655 S 0.000 0.000 0.000 0.104 0.416 0.729 1.093 0.469 0.000 2.811 SSW 0.000 0.052 0.052 0.156 0.208 0.312 0.989 0.000 0.000 1.770 SW 0.000 0.000 0.052 0.104 0.052 0.364 0.364 0.104 0.000 1.041 WSW 0.000 0.052 0.208 0.208 0.260 0.416 0.885 0.000 0.000 2.030 W 0.000 0.000 0.156 0.260 0.000 0.260 0.260 0.000 0.000 0.937 WNW 0.000 0.000 0.000 0.052 0.104 0.052 0.052 0.000 0.000 0.260 NW 0.000 0.000 0.156 0.156 0.208 0.000 0.104 0.000 0.000 0.625 NNW 0.000 0.052 0.000 0.104 0.260 0.469 0.469 0.000 0.000 1.353 SUBTOTAL 0.000 0.156 0.885 1.926 2.811 5.986 10.359 1.666 0.104 23.894 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS E 519 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 459 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1921 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/07/20 MEAN WIND SPEED = 11.90 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.052 0.000 0.208 0.729 0.000 0.000 0.989 NNE 0.000 0.052 0.156 0.052 0.104 0.208 0.573 0.208 0.000 1.353 NE 0.000 0.000 0.000 0.000 0.000 0.208 0.156 0.104 0.000 0.469 ENE 0.000 0.052 0.000 0.052 0.000 0.104 0.052 0.052 0.000 0.312 E 0.000 0.000 0.052 0.052 0.052 0.052 0.000 0.000 0.000 0.208 ESE 0.000 0.000 0.156 0.104 0.104 0.260 0.260 0.000 0.000 0.885 SE 0.000 0.000 0.104 0.208 0.156 0.677 0.156 0.000 0.000 1.301 SSE 0.000 0.000 0.000 0.052 0.104 0.469 0.416 0.000 0.000 1.041 S 0.000 0.000 0.052 0.104 0.000 0.312 0.521 0.000 0.000 0.989 SSW 0.000 0.000 0.000 0.156 0.000 0.000 0.208 0.000 0.000 0.364 SW 0.000 0.052 0.052 0.000 0.000 0.000 0.052 0.000 0.000 0.156 WSW 0.000 0.000 0.052 0.156 0.000 0.104 0.156 0.000 0.000 0.469 W 0.000 0.000 0.000 0.052 0.052 0.000 0.052 0.000 0.000 0.156 WNW 0.000 0.000 0.000 0.052 0.052 0.000 0.000 0.000 0.000 0.104 NW 0.000 0.000 0.000 0.104 0.000 0.156 0.000 0.000 0.000 0.260 NNW 0.000 0.052 0.000 0.156 0.000 0.364 0.260 0.052 0.000 0.885 SUBTOTAL 0.000 0.208 0.625 1.353 0.625 3.123 3.592 0.416 0.000 9.943 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS F 259 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 191 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1921 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/07/20 MEAN WIND SPEED = 10.65 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT APR 1, 2021 - JUN 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.052 0.000 0.052 0.000 0.156 0.000 0.000 0.260 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.208 0.260 0.000 0.469 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.208 0.000 0.208 ENE 0.000 0.000 0.000 0.052 0.000 0.000 0.000 0.000 0.000 0.052 E 0.000 0.000 0.052 0.000 0.000 0.104 0.000 0.000 0.000 0.156 ESE 0.000 0.000 0.156 0.156 0.052 0.000 0.000 0.000 0.000 0.364 SE 0.000 0.000 0.052 0.000 0.000 0.104 0.000 0.000 0.000 0.156 SSE 0.000 0.000 0.052 0.052 0.052 0.156 0.000 0.000 0.000 0.312 S 0.000 0.000 0.000 0.000 0.000 0.104 0.000 0.000 0.000 0.104 SSW 0.000 0.000 0.104 0.104 0.052 0.000 0.000 0.000 0.000 0.260 SW 0.000 0.052 0.104 0.052 0.052 0.104 0.000 0.000 0.000 0.364 WSW 0.000 0.000 0.052 0.052 0.052 0.052 0.000 0.000 0.000 0.208 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.052 0.104 0.000 0.052 0.000 0.000 0.000 0.208 NW 0.000 0.000 0.052 0.000 0.000 0.052 0.000 0.000 0.000 0.104 NNW 0.000 0.000 0.052 0.000 0.000 0.052 0.000 0.000 0.000 0.104 SUBTOTAL 0.000 0.052 0.781 0.573 0.312 0.781 0.364 0.469 0.000 3.332 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS G 90 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 64 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1921 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/07/20 MEAN WIND SPEED = 8.68 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 150 of 165 Table 8-C Elevated Releases - 3rd Quarter JFD Joint Frequency Distribution In Percent

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS A 0 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 0 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2198 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/10/14 MEAN WIND SPEED = 0.00 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.045 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.045 0.000 0.045 0.182 0.000 0.000 0.273 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.045 0.000 0.045 0.000 0.000 0.000 0.091 SSW 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.045 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.045 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.136 0.000 0.000 0.136 SUBTOTAL 0.000 0.000 0.000 0.091 0.045 0.136 0.364 0.000 0.000 0.637 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS B 14 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 14 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2198 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/10/14 MEAN WIND SPEED = 11.61 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.273 0.091 0.000 0.000 0.364 NNE 0.000 0.000 0.000 0.000 0.000 0.136 0.091 0.000 0.000 0.227 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.045 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.091 0.136 0.000 0.000 0.227 SE 0.000 0.000 0.045 0.091 0.000 0.182 0.182 0.000 0.000 0.500 SSE 0.000 0.000 0.045 0.045 0.000 0.000 0.000 0.091 0.000 0.182 S 0.000 0.000 0.000 0.045 0.091 0.182 0.000 0.000 0.000 0.318 SSW 0.000 0.000 0.045 0.045 0.045 0.045 0.045 0.000 0.000 0.227 SW 0.000 0.000 0.000 0.318 0.045 0.045 0.045 0.000 0.000 0.455 WSW 0.000 0.000 0.045 0.091 0.136 0.045 0.000 0.000 0.000 0.318 W 0.000 0.000 0.000 0.000 0.045 0.182 0.000 0.000 0.000 0.227 WNW 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.045 NW 0.000 0.000 0.000 0.000 0.000 0.136 0.000 0.091 0.000 0.227 NNW 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.045 SUBTOTAL 0.000 0.000 0.182 0.637 0.364 1.410 0.637 0.182 0.000 3.412 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS C 76 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 75 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2198 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/10/14 MEAN WIND SPEED = 9.57 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.136 0.409 1.456 0.227 0.000 0.000 2.229 NNE 0.000 0.045 0.000 0.318 0.955 1.592 0.182 0.000 0.000 3.094 NE 0.000 0.000 0.182 0.318 0.409 0.364 0.136 0.000 0.000 1.410 ENE 0.000 0.000 0.227 0.091 0.136 0.318 0.045 0.000 0.000 0.819 E 0.000 0.000 0.364 0.182 0.182 0.455 0.136 0.091 0.182 1.592 ESE 0.000 0.000 0.273 0.364 0.773 1.729 1.046 0.045 0.045 4.277 SE 0.000 0.000 0.409 1.001 0.728 1.865 1.592 0.455 0.045 6.096 SSE 0.000 0.045 1.001 1.092 0.455 1.683 0.955 0.045 0.000 5.278 S 0.000 0.000 0.955 0.910 1.456 2.548 1.092 0.273 0.000 7.234 SSW 0.000 0.091 0.910 1.183 1.410 1.183 0.773 0.045 0.000 5.596 SW 0.000 0.045 1.046 1.001 0.864 0.773 0.273 0.000 0.000 4.004 WSW 0.000 0.000 0.546 1.729 1.092 0.773 0.045 0.000 0.000 4.186 W 0.000 0.000 0.227 0.682 1.046 0.819 0.000 0.000 0.000 2.775 WNW 0.000 0.000 0.091 0.318 0.455 0.910 0.591 0.273 0.045 2.684 NW 0.000 0.045 0.136 0.182 0.273 0.500 0.409 0.273 0.000 1.820 NNW 0.000 0.000 0.091 0.136 0.136 0.409 0.318 0.091 0.000 1.183 SUBTOTAL 0.000 0.273 6.460 9.645 10.783 17.379 7.825 1.592 0.318 54.277 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS D 1194 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 1193 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2198 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/10/14 MEAN WIND SPEED = 8.39 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.001 0.000 0.045 0.227 0.136 0.637 0.364 0.182 0.000 1.593 NNE 0.000 0.000 0.000 0.136 0.455 1.137 1.046 0.091 0.000 2.866 NE 0.001 0.000 0.045 0.227 0.273 0.728 0.136 0.000 0.000 1.411 ENE 0.002 0.000 0.136 0.136 0.182 0.546 0.045 0.000 0.000 1.048 E 0.003 0.000 0.182 0.273 0.227 0.591 0.182 0.000 0.000 1.459 ESE 0.003 0.000 0.227 0.227 0.182 1.547 1.001 0.000 0.000 3.188 SE 0.003 0.000 0.227 0.318 0.637 2.138 0.318 0.000 0.000 3.643 SSE 0.006 0.000 0.409 0.455 0.955 1.274 0.136 0.000 0.000 3.236 S 0.006 0.045 0.364 0.546 0.546 0.773 0.409 0.091 0.000 2.781 SSW 0.004 0.000 0.273 0.273 0.409 0.728 0.637 0.091 0.000 2.415 SW 0.003 0.045 0.136 0.182 0.273 0.091 0.000 0.000 0.000 0.731 WSW 0.003 0.000 0.227 0.273 0.045 0.045 0.045 0.000 0.000 0.640 W 0.003 0.000 0.182 0.182 0.091 0.227 0.000 0.000 0.000 0.685 WNW 0.005 0.000 0.318 0.273 0.364 0.273 0.045 0.000 0.000 1.279 NW 0.001 0.000 0.091 0.136 0.091 0.182 0.091 0.000 0.000 0.593 NNW 0.001 0.000 0.091 0.000 0.000 0.227 0.091 0.136 0.000 0.547 SUBTOTAL 0.045 0.091 2.957 3.867 4.868 11.146 4.550 0.591 0.000 28.116 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS E 618 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 618 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2198 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/10/14 MEAN WIND SPEED = 8.68 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.091 0.182 0.273 0.364 0.182 0.045 0.000 1.137 NNE 0.000 0.000 0.091 0.091 0.273 0.318 0.546 0.000 0.000 1.319 NE 0.000 0.000 0.045 0.000 0.045 0.227 0.409 0.045 0.000 0.773 ENE 0.000 0.045 0.136 0.091 0.136 0.364 0.091 0.000 0.000 0.864 E 0.000 0.000 0.091 0.000 0.091 0.409 0.045 0.000 0.000 0.637 ESE 0.000 0.000 0.045 0.182 0.227 0.182 0.091 0.000 0.000 0.728 SE 0.000 0.091 0.273 0.091 0.273 0.273 0.000 0.000 0.000 1.001 SSE 0.000 0.045 0.273 0.273 0.364 0.273 0.000 0.000 0.000 1.228 S 0.000 0.045 0.091 0.182 0.500 0.182 0.136 0.000 0.000 1.137 SSW 0.000 0.045 0.136 0.091 0.227 0.136 0.227 0.000 0.000 0.864 SW 0.000 0.045 0.091 0.045 0.045 0.045 0.000 0.000 0.000 0.273 WSW 0.000 0.045 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.182 W 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.045 WNW 0.000 0.000 0.045 0.000 0.045 0.000 0.000 0.000 0.000 0.091 NW 0.000 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.091 NNW 0.000 0.045 0.136 0.045 0.000 0.091 0.318 0.000 0.000 0.637 SUBTOTAL 0.000 0.409 1.729 1.319 2.548 2.866 2.047 0.091 0.000 11.010 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS F 242 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 242 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2198 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/10/14 MEAN WIND SPEED = 7.99 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data JUL 1, 2021 - SEP 30, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.045 0.045 0.000 0.000 0.000 0.227 0.000 0.000 0.318 NNE 0.000 0.000 0.000 0.000 0.000 0.045 0.227 0.045 0.000 0.318 NE 0.000 0.000 0.000 0.045 0.045 0.227 0.227 0.000 0.000 0.546 ENE 0.000 0.000 0.045 0.045 0.000 0.273 0.000 0.000 0.000 0.364 E 0.000 0.045 0.045 0.000 0.091 0.227 0.000 0.000 0.000 0.409 ESE 0.000 0.045 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.091 SE 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.091 SSE 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.091 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.045 SW 0.000 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.091 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.091 NNW 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 SUBTOTAL 0.000 0.136 0.455 0.273 0.182 0.773 0.682 0.045 0.000 2.548 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2200 TOTAL HOURS OF STABILITY CLASS G 56 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 56 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2198 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Browns Ferry Nuclear Plant STA 52 D - Validated Edited Data STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2021/10/14 MEAN WIND SPEED = 8.82 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 158 of 165 Table 8-D Elevated Releases - 4th Quarter JFD Joint Frequency Distribution In Percent

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BROWNS FERRY NUCLEAR PLANT OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2198 TOTAL HOURS OF STABILITY CLASS A 0 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 0 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2022/01/26 MEAN WIND SPEED = 0.00 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 SSE 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0.092 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2198 TOTAL HOURS OF STABILITY CLASS B 2 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 2 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2022/01/26 MEAN WIND SPEED = 9.20 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.138 0.046 0.092 0.000 0.276 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.092 0.000 0.000 0.092 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.046 0.000 0.092 SSE 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.184 0.000 0.000 0.000 0.184 SW 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.046 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.184 0.046 0.000 0.230 SUBTOTAL 0.000 0.000 0.000 0.000 0.092 0.368 0.368 0.184 0.000 1.012 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2198 TOTAL HOURS OF STABILITY CLASS C 22 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 22 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2022/01/26 MEAN WIND SPEED = 13.45 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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BROWNS FERRY NUCLEAR PLANT OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.092 0.046 0.138 0.828 1.795 0.276 0.000 3.175 NNE 0.000 0.000 0.046 0.322 0.230 1.381 0.368 0.000 0.000 2.347 NE 0.000 0.000 0.092 0.092 0.230 0.552 0.046 0.000 0.000 1.012 ENE 0.000 0.000 0.000 0.138 0.322 0.138 0.000 0.000 0.000 0.598 E 0.000 0.000 0.000 0.138 0.230 0.230 0.000 0.000 0.000 0.598 ESE 0.000 0.000 0.184 0.322 0.644 0.690 0.092 0.000 0.000 1.933 SE 0.000 0.046 0.138 0.368 0.736 0.874 0.506 0.184 0.322 3.175 SSE 0.000 0.000 0.184 0.644 0.230 1.104 0.874 0.368 0.000 3.405 S 0.000 0.000 0.230 0.276 0.322 1.519 2.071 0.598 0.000 5.016 SSW 0.000 0.000 0.322 0.322 0.092 0.828 1.243 0.828 0.046 3.682 SW 0.000 0.000 0.276 0.322 0.276 0.828 0.230 0.000 0.000 1.933 WSW 0.000 0.000 0.322 0.322 0.276 0.368 0.460 0.000 0.000 1.749 W 0.000 0.046 0.000 0.368 0.414 0.552 0.966 0.138 0.000 2.485 WNW 0.000 0.000 0.046 0.276 0.460 1.335 0.644 0.184 0.092 3.037 NW 0.000 0.000 0.046 0.092 0.414 0.736 0.552 0.414 0.092 2.347 NNW 0.000 0.046 0.000 0.092 0.230 0.782 0.966 0.414 0.000 2.531 SUBTOTAL 0.000 0.138 1.979 4.142 5.246 12.747 10.815 3.405 0.552 39.024 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2198 TOTAL HOURS OF STABILITY CLASS D 851 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 848 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2022/01/26 MEAN WIND SPEED = 11.05 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 163 of 165 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.092 0.092 0.690 0.782 0.046 0.000 1.703 NNE 0.004 0.000 0.092 0.000 0.138 1.197 1.381 0.000 0.000 2.811 NE 0.002 0.000 0.046 0.092 0.046 0.368 0.276 0.000 0.000 0.830 ENE 0.002 0.000 0.046 0.092 0.276 0.598 0.138 0.000 0.000 1.152 E 0.000 0.000 0.000 0.184 0.138 0.828 0.046 0.000 0.000 1.197 ESE 0.004 0.000 0.092 0.276 0.184 0.828 0.184 0.138 0.000 1.706 SE 0.002 0.000 0.046 0.184 0.276 1.150 1.427 0.552 0.000 3.637 SSE 0.002 0.000 0.046 0.184 0.552 1.519 2.899 0.598 0.000 5.800 S 0.006 0.092 0.046 0.276 0.552 1.611 3.590 1.427 0.506 8.105 SSW 0.011 0.000 0.276 0.460 0.322 1.104 2.669 0.506 0.276 5.625 SW 0.002 0.000 0.046 0.322 0.322 0.736 0.966 0.368 0.046 2.809 WSW 0.004 0.000 0.092 0.138 0.138 0.322 0.230 0.000 0.000 0.924 W 0.002 0.000 0.046 0.046 0.092 0.644 0.184 0.000 0.000 1.014 WNW 0.004 0.000 0.092 0.092 0.184 0.736 0.230 0.000 0.000 1.338 NW 0.002 0.000 0.046 0.184 0.046 0.368 0.460 0.092 0.000 1.198 NNW 0.002 0.000 0.046 0.046 0.184 0.460 0.736 0.046 0.000 1.520 SUBTOTAL 0.046 0.092 1.058 2.669 3.543 13.162 16.199 3.774 0.828 41.371 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2198 TOTAL HOURS OF STABILITY CLASS E 916 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 899 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2022/01/26 MEAN WIND SPEED = 12.55 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 164 of 165 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<= 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.046 0.000 0.046 0.184 0.368 0.138 0.000 0.782 NNE 0.000 0.000 0.138 0.046 0.092 0.322 0.276 0.184 0.000 1.058 NE 0.000 0.000 0.000 0.046 0.000 0.138 0.184 0.092 0.000 0.460 ENE 0.000 0.000 0.092 0.000 0.000 0.276 0.184 0.000 0.000 0.552 E 0.000 0.000 0.000 0.000 0.184 0.000 0.000 0.000 0.000 0.184 ESE 0.000 0.000 0.276 0.046 0.138 0.230 0.000 0.000 0.000 0.690 SE 0.000 0.000 0.092 0.322 0.230 0.828 0.598 0.000 0.000 2.071 SSE 0.000 0.000 0.138 0.322 0.276 1.519 0.552 0.000 0.000 2.807 S 0.000 0.000 0.184 0.046 0.046 0.644 0.598 0.092 0.000 1.611 SSW 0.000 0.046 0.000 0.092 0.276 0.598 0.000 0.000 0.000 1.012 SW 0.000 0.000 0.046 0.092 0.138 0.322 0.000 0.000 0.000 0.598 WSW 0.000 0.000 0.230 0.138 0.138 0.276 0.000 0.000 0.000 0.782 W 0.000 0.000 0.000 0.184 0.046 0.000 0.000 0.000 0.000 0.230 WNW 0.000 0.000 0.184 0.092 0.000 0.000 0.000 0.000 0.000 0.276 NW 0.000 0.000 0.092 0.000 0.046 0.046 0.092 0.000 0.000 0.276 NNW 0.000 0.000 0.000 0.000 0.000 0.092 0.322 0.046 0.000 0.460 SUBTOTAL 0.000 0.046 1.519 1.427 1.657 5.476 3.175 0.552 0.000 13.852 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2198 TOTAL HOURS OF STABILITY CLASS F 306 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 301 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2022/01/26 MEAN WIND SPEED = 9.65 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Browns Ferry Nuclear Plant Units 1, 2 and 3 2021 Annual Radioactive Effluent Release Report Meteorological Data Page 165 of 165 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 2021 - DEC 31, 2021 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.414 0.138 0.000 0.552 NNE 0.000 0.000 0.000 0.000 0.000 0.092 0.552 0.138 0.000 0.782 NE 0.000 0.046 0.000 0.046 0.000 0.138 0.138 0.000 0.000 0.368 ENE 0.000 0.000 0.046 0.046 0.184 0.092 0.000 0.000 0.000 0.368 E 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 ESE 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SE 0.000 0.000 0.092 0.138 0.138 0.322 0.046 0.000 0.000 0.736 SSE 0.000 0.000 0.184 0.000 0.138 0.230 0.000 0.000 0.000 0.552 S 0.000 0.000 0.000 0.000 0.046 0.092 0.000 0.000 0.000 0.138 SSW 0.000 0.000 0.000 0.046 0.138 0.000 0.000 0.000 0.000 0.184 SW 0.000 0.000 0.000 0.046 0.092 0.046 0.000 0.000 0.000 0.184 WSW 0.000 0.046 0.000 0.092 0.046 0.000 0.000 0.000 0.000 0.184 W 0.000 0.000 0.000 0.046 0.046 0.046 0.000 0.000 0.000 0.138 WNW 0.000 0.000 0.092 0.046 0.000 0.000 0.000 0.000 0.000 0.138 NW 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.092 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.092 0.046 0.000 0.138 SUBTOTAL 0.000 0.092 0.460 0.552 0.920 1.058 1.243 0.322 0.000 4.648 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2198 TOTAL HOURS OF STABILITY CLASS G 101 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 101 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 90.29 METER LEVEL DATE PRINTED: 2022/01/26 MEAN WIND SPEED = 9.46 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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