ML22118A364

2021 Annual Radioactive Effluent Release Report (ARERR)

ML22118A364
Person / Time
Site:	Byron
Issue date:	04/28/2022
From:	Kowalski J Constellation Energy Generation
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
2022-0025
Download: ML22118A364 (91)

Text

Constellation April 28, 2022 L TR:

BYRON 2022-0025 File 1.10.0101 (1 D.101) 2.12.1522 (2C.111)

United States Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Byron Station, Units 1 and 2 Constellation Energy Generation. LLC (CEG)

Byron Station 4450 N German Church Road Byron, IL 61010-9794 www constellahonenergy com 10 CFR 50.36a Renewed Facility Operating License Nos. NPF-37 and NPF-66 NRC Docket Nos. STN 50-454 and STN 50-455

Subject:

2021 Annual Radioactive Effluent Release Report (ARERR)

Enclosed is the Annual Radioactive Effluent Release Report for Byron Station. This report is being submitted in accordance with 10 CFR 50.36 a(2), "Technical specifications on effluents from nuclear power reactors," and includes a summary of radiological liquid and gaseous effluents and solid waste released from the site from January 2021 through December 2021.

If you have any questions regarding this information, please contact Ms. Zoe Cox, Regulatory Assurance Manager, at (815) 406-2800.

Respectfully, 4-fL-John J. Kowalski Site Vice President Byron Station JJK/AH/ZC/sg Enclosures cc: Regional Administrator - NRC Region Ill

BYRON NUCLEAR POWER STATION ANNUAL RADIOLOGICAL EFFLUENT RELEASE REPORT (ARERR) 2021 Page 1 of90

INTRODUCTION Liquid effluents from Byron Station are released to the Rock River in controlled batches after radioassay of each batch. Gaseous effluents are released to the atmosphere and are calculated on the basis of analyses of weekly grab samples and grab samples of batch releases prior to the release of noble gases as well as continuously collected composite samples of iodine and particulate radioactivity sampled during the course of the year. The results of effluent analyses are summarized on a monthly basis. Airborne concentrations of noble gases, 1-131, and particulate radioactivity in offsite areas are calculated using isotopic composition of effluents and meteorological data. C-14 concentration in offsite areas is calculated based on industry-approved methodology for estimation of the amount released and meteorological data.

Environmental monitoring is conducted by sampling at indicator and control (background) locations in the vicinity of Byron Station to measure changes in radiation or radioactivity levels that may be attributable to station operation. If significant changes attributable to Byron Station are measured, these changes are correlated with effluent releases. An environmental monitoring program is conducted which also includes all potential pathways at the site. Gaseous pathways include ground plane (direct), inhalation, vegetation, meat, and milk.

Page 2 of90

BYRON NUCLEAR POWER STATION UNIT 1/2 DOCKET NUMBER STN-50-454/455 RADIOACTIVE EFFLUENT RELEASE REPORT January 2021 - December 2021 Supplemental Information

1.

Regulatory Limits

a.

Fission and activation products:

Tech Spec Whole Body =

Skin =

1 0CFR50 Gamma =

Beta =

500 mrem/year 3000 mrem/year 5 mrad/quarter; 1 0 mrad/year 1 0 mrad/quarter; 20 mrad/year

b.

Iodine: (summed with particulate, see below)

c.

Particulates with half-lives > 8 days:

Tech Spec Organ =

1 0CFR50 Organ =

d.

Liquid Effluents:

1 0CFRS0 Whole Body =

Organ =

2.

Maximum Permissible Concentration 1500 mrem/year 7.5 mrem/quarter; 15 mrem/year 1.5 mrem/quarter; 3 mrem/year 5 mrem/quarter; 10 mrem/year

a.

Fission and Activation Products: 10CFR20 Appendix B Table 2

b.

Iodine: 1 0CFR20 Appendix B Table 2

c.

Particulates: 10CFR20 Appendix B Table 2

d.

Liquid Effluents: 10 X 10CFR20 Appendix B Table 2

3.

Average Energy: This item is not applicable. The 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.

4.

Measurements and Approximations of Total Radioactivity

a.

Fission and activation products: Prior to release, the isotopic content is determined. Released activity is calculated using volume of release, which is determined by the change in tank level, containment pressure, or containment purge fan flow rates.

b.

Particulate and iodine sampling media for the plant vent stacks are continuously collected and analyzed weekly. Tritium and noble gas analysis for the plant vent stacks are obtained and analyzed weekly.

c.

Liquid effluents: Isotopic analysis is performed on each batch liquid release tank prior to its release. Total release activity is calculated using volume of release. Total tritium activity released is calculated from the highest of a monthly circulating water blowdown composite activity or a sum of the effluent input composite activities.

Page 3 of 90

d.

All positive results (i.e. higher than the lower limit of detection (LLD)) are reported in units of µCi/cc or µCi/ml unless otherwise noted. All LLD values and the associated LLD requirements are listed in Attachment A.

5.

Batch Releases:

a.

Liquid:

1.

Number of batch releases= 88

2.

Total time period for batch releases= 14,234 minutes

3.

Maximum time period for a batch release= 514 minutes

4.

Average time period for a batch release= 162 minutes

5.

Minimum time period for a batch release= 39 minutes

6.

Average Rock River stream flow during periods of release of effluent into a flowing stream

= 134 m3/sec, based on information from the U.S. Geological Survey Byron Gauging Station.

b.

Gaseous:

1.

Number of batch releases = 313

2.

Total time period for batch releases= 36,307 minutes

3.

Maximum time period for a batch release= 3,095 minutes

4.

Average time period for batch releases = 116 minutes

5.

Minimum time period for a batch release= 27 minutes

6.

Abnormal Releases:

a.

Liquid - None

b.

Gaseous - None

7.

There was no revision to the Offsite Dose Calculation Manual (ODCM) in 2021.

8.

Errata Data In 2020's ARE RR it was stated that 6 additional casks were added to the ISFSI pad in 2020 and that was incorrect. No casks were added to the ISFSI pad in 2020.

9.

2021 Radiological Groundwater Protection Program (RGPP) Results Summary:

In 2021, Radiological Groundwater Protection Program (RGPP) monitoring well designations and sampling frequencies were modified to align with an update to the Nuclear Energy Institute (NEI) 07-07, Groundwater Protection Initiative. In 2021, fourteen (14) monitoring wells were sampled in total.

Groundwater samples were obtained in March, June, September, and November for tritium. In addition, gamma isotopic analyses were performed on all wells and Sr-89 and Sr-90 analyses were performed on select wells for the samples obtained in June in accordance with site procedures and the Nuclear Energy Institute (NEI) 07-07, Groundwater Protection Initiative. None of these samples showed detectable concentrations of gamma activity or Sr-89/Sr-90. Three wells contained levels of tritium above the lower limit of detection (LLD) of 200 pCi/L. They were AR-4 (201 pCi/L in March), AR-7 (234 pCi/L in March, 228 pCi/L in June, 230 pCi/L in November), and AR-11 (397 pCi/L in June, 444 pCi/L in November). Wells AR-4 and AR-11 are near the Circulating Water Slowdown piping, where historical leakage through vacuum breakers was known to have occurred. These wells have exhibited an overall decreasing trend since 2006. Tritium in Well AR-7, located on-site just west of plant structures, has been measured in this well slightly above detection limits on an intermittent basis since the well was first drilled in 2006. The tritium present in this well is likely due to legacy tritium prior to 2006 or precipitation recapture and is not believed to be the result of new leaks. The tritium measured in this well has been at or below tritium levels Page 4 of90

that have been historically measured in rainwater as a result of precipitation recapture from permitted gaseous releases. In August 2014, a break in the well piping was discovered about six feet below the surface that may have served as the entry point for tritium in the recapture water. Tritium present in well AR-7 has exhibited an overall decrease since 2014. None of these wells are used for drinking water, however, should any of the water in these aquifers migrate to off-site wells used for drinking, the off-site dose consequence from tritium present in these wells would be negligible. All groundwater well sample results are well below the drinking water standard of 20,000 pCi/L tritium. AMO Environmental Decisions, a nuclear utility groundwater consultant, has reviewed the 2021 RGPP data and concluded there is no evidence of new or ongoing tritium leak(s) at the site.

SUMMARY

Calculations based on gaseous and liquid effluents and meteorological data indicate that public dose due to radioactive material attributable to Byron Station during the period did not exceed any regulatory or Offsite Dose Calculation Manual (ODCM) limits.

The Total Effective Dose Equivalent (TEDE) due to licensed activities at Byron Station calculated for the maximum exposed individual for the period is 5.02E-01 mrem. The annual limit on TEDE is 100 mrem.

The assessment of radiation doses to the public is performed in accordance with the ODCM. The results of these analyses confirm that the station is operating in compliance with 1 0CFR50 Appendix I, 1 0CFR20 and 40CFR190.

There were no additional operational controls implemented in 2021 that affected radiological effluents.

There were no measurements which exceeded the reporting levels, including any that would not have been attributable to station effluents.

The results of the current radiological environmental monitoring program are approximately the same as those found during the pre-operational studies conducted at Byron Station.

RELEASES Gaseous Effluents to the Atmosphere A total of 1.41 E+00 curies of fission and activation gases were released with a maximum average quarterly release rate of 5.00E-02 µCi/sec.

Activity associated with 1-131 was below detectable limits during each quarter of the year.

Airborne particulate matter activity was below detectable limits during each quarter of the year.

A total of 8. 79E+00 curies of other (C-14) radioisotopes were released with a maximum average quarterly release rate of 1.49E-01 µCi/sec.

A total of 9. 72E+01 curies of tritium were released with a maximum average quarterly release rate of 3.29E+00 µCi/sec.

Gross alpha-emitting radionuclides were below detectable limits during each quarter of the year.

Liquids Released to Rock River A total of 3.12E+ 1 0 liters of radioactive liquid wastes containing 4.14E-02 curies of fission and activation Page 5 of90

products were discharged with a maximum quarterly average concentration of 1.87E-09 µCi/ml.

A total of 2.52E+03 curies of tritium were discharged with a maximum quarterly average concentration of 1.49E-04 µCi/ml.

A total of 1.13E-03 curies of dissolved and entrained gases were discharged with a maximum quarterly average concentration of 1.31 E-1 0 µCi/ml.

A total of 1.13E-03 curies of Gross alpha-emitting radionuclides were discharged with a maximum quarterly average concentration of 5.14E-04 µCi/ml.

DOSE TO HUMAN GASEOUS EFFLUENT PATHWAYS Noble Gas - Gamma Dose Rates Offsite Gamma air and whole body dose rates for the period were calculated based on measured release rates, isotopic composition of the noble gases, and average meteorological data. The maximum gamma air dose was 2.27E-04 mrad based on measured effluents and average meteorological data, and 4.00E-05 mrad based on measured effluents and concurrent meteorological data.

Noble Gas - Beta Air and Skin Dose Rates The range of beta particles in air is relatively small (on the order of a few meters or less). Consequently, plumes of gaseous effluents may be considered "semi-infinite" for the purpose of calculating the dose from beta radiation incident on the skin. However, the actual dose to sensitive skin tissues is difficult to calculate due to the effect of the beta particle energies, thickness of inert skin, and clothing covering sensitive tissues. For purposes of this report the skin is taken to have a thickness of 7.0 mg/cm 2 and an occupancy factor of 1.0 is used. The maximum skin dose was 3.1 SE-04 mrem based on measured effluents and average meteorological data, and 4.53E-05 mrem based on measured effluents and concurrent meteorological data.

The maximum offsite beta air dose for the year based on measured effluents and average meteorological data was 1.08E-06 mrad and 2.44E-05 mrad based on measured effluents and concurrent meteorological data.

Radioactive Iodine & Particulate The human thyroid exhibits a significant capacity to concentrate ingested or inhaled iodine. 1-131 released during routine operation of the station may be made available to man resulting in dose to the thyroid. C-14 is also included in this category. C-14 exhibits a capacity to concentrate in bone. C-14 is released in gaseous form and is absorbed into vegetation through photosynthesis. The principal pathways of interest for C-14 are the consumption of vegetation by humans and milk from which animals have ingested C-14 through the consumption of vegetation. With the requirement to begin reporting C-14 dose in 2011 and the addition of C-14 to plant effluents, human dose in this category is primarily driven by the release of C-14 from the plant.

The hypothetical dose to the maximum exposed individual living near the station via ingestion of milk and vegetation was calculated. The source of milk and vegetation was assumed to be at the nearest site boundary with the cows pastured and vegetation grown from May through October. The maximum organ dose from radioactive iodine and particulate (including C-14) to any organ was 2.29E+OO mrem (child/bone) based on measured effluents and average meteorological data, and 6.76E-01 mrem (child/bone) based on measured effluents and concurrent meteorological data. The maximum dose from Page 6 of90

radioactive iodine and particulate (including C-14) to the whole body was 4.77E-01 mrem (child) based on measured effluents and average meteorological data, and 1.41 E-01 mrem (child) based on measured effluents and concurrent meteorological data.

Gaseous Total Dose The maximum total dose from gaseous releases to any organ was 2.29E+00 mrem (child/bone) based on measured effluents and average meteorological data, and 6. 76E-01 mrem (child/bone) based on measured effluents and concurrent meteorological data. The maximum total dose from gaseous releases to the whole body was 4.77E-01 mrem (child) based on measured effluents and average meteorological data, and 1.41 E-01 mrem (child) based on measured effluents and concurrent meteorological data.

LIQUID EFFLUENT PATHWAYS The principal pathways through the aquatic environment for potential doses to man from liquid waste are ingestion of potable water and eating aquatic foods. Liquid dose was calculated based on the ingestion of potable water and sport fish. It should be noted, however, there are currently no communities within 10 km downstream of the plant using the Rock River for drinking water. NRG-developed equations are used to calculate the doses to the whole body, bone, liver, thyroid, kidney, lung, lower GI tract, and skin.

Specific parameters for use in the equations are given in the Exelon Offsite Dose Calculation Manual (ODCM).

The maximum dose from liquid releases to any organ was 3.00E-02 mrem (adulUGI-LLI). The maximum dose from liquid releases to the whole body was 2.52E-02 mrem (child).

GASEOUS+ LIQUID TOTAL DOSE The maximum total dose to any organ via both gaseous and liquid effluents is 2.33E+00 mrem (child/bone). The maximum dose to the whole body via both gaseous and liquid effluents is 5.02E-01 mrem (adult).

Dose Limits to Members of the Public Byron Station did not exceed any of the dose limits as shown below based on concurrent or historical meteorological data:

The limits on dose or dose commitment to a member of the public due to radioactive materials in liquid effluents from each reactor is 1.5 mrem to the whole body or 5 mrem to any organ during any calendar quarter and 3 mrem to the whole body or 10 mrem to any organ during a calendar year.

The limits on air dose due to noble gases released in gaseous effluents to a member of the public from each reactor is 5 mrad for gamma radiation or 1 0 mrad for beta radiation during any calendar quarter and 1 0 mrad for gamma radiation or 20 mrad for beta radiation during a calendar year.

The limits on dose to a member of the public due to radioactive iodine & particulate with half-lives greater than eight days in gaseous effluents released from each reactor is 7.5 mrem to any organ during any calendar quarter and 15 mrem to any organ during a calendar year.

The annual 1 0CFR20 limit on Total Effective Dose Equivalent. to individual members of the public is 100 mrem.

Page 7 of90

The 40CFR190 limits on individual members of the public is 25 mrem to the whole body, 25 mrem to any organ (except thyroid), and 75 mrem to the thyroid.

SITE METEOROLOGY Detailed records of the site meteorological measurements taken during each calendar quarter of the year are maintained by the meteorological vendor, retained on site, and are available upon request. The data are presented as cumulative joint frequency distributions of the wind direction for the 250' level and wind speed class by atmospheric stability class determined from the temperature difference between the 250' and 30' levels. Data recovery for all measurements on the meteorological tower was 99.6% during 2021.

Page 8 of90

EFFLUENT AND WASTE DISPOSAL REPORT TABLE lA GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES Unit 1 REPORT FOR 2021 Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission & Activation Gases

1. Total Release Ci 9.31E-02 1.28E-01 2.37E-01 3.98E-01 8.56E-01

2. Avg. Release Rate

µCi/sec 1.20E-02 1.63E-02 2.98E-02 S.00E-02 lodine-131

1. Total Release Ci (1)

(1)

(1)

(1)

(1)

2. Avg. Release Rate

µCi/sec (1)

(1)

(1)

(1)

Particulates Half Life >= 8 days

1. Total Release Ci (1)

(1)

(1)

(1)

(1)

2. Avg. Release Rate

µCi/sec (1)

(1)

(1)

(1)

Carbon-14

1. Total Release Ci l.l0E+00 1.llE+00 8.7SE-01 l.lOE+00 4.18E+00

2. Avg. Release Rate

µCi/sec l.41E-01 1.41E-01 l.l0E-01 l.38E-01 Tritium

1. Total Release Ci 6.34E+00 2.65E+00 2.SlE+00 5.31E+00 1.68E+0l

2. Avg. Release Rate

µCi/sec 8.16E-01 3.37E-01 3.16E-01 6.68E-01 Gross Alpha Radioactivity

1. Total Release Ci (1)

(1)

(1)

(1)

(1)

2. Avg. Release Rate

µCi/sec (1)

(1)

(1)

(1)

(1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements ofTRM Section 3.11 Page 9 of90

EFFLUENT AND WASTE DISPOSAL REPORT TABLE lA GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES Unit2 REPORT FOR 2021 Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission & Activation Gases

1. Total Release Ci 3.22E-02 6.lOE-02 9.44E-02 3.68E-01 S.SGE-01

2. Avg. Release Rate

µCi/sec 4.14E-03 7.76E-03 l.19E-02 4.63E-02 lodine-131

1. Total Release Ci (1)

(1)

(1)

(1)

(1)

2. Avg. Release Rate

µCi/sec (1)

(1)

(1)

(1)

Particulates Half Life>= 8 days

1. Total Release Ci (1)

(1)

(1)

(1)

(1)

2. Avg. Release Rate

µCi/sec (1)

(1)

(1)

(1)

Carbon-14

1. Total Release Ci l.16E+00 1.12E+00 l.16E+00 l.17E+00 4.61E+00

2. Avg. Release Rate

µCi/sec l.49E-01 1.43E-01 1.46E-01 l.47E-01 Tritium

1. Total Release Ci 1.02E+0l 1.81E+0l 2.60E+0l 2.61E+0l 8.04E+0l

2. Avg. Release Rate

µCi/sec 1.31E+00 2.30E+00 3.27E+00 3.29E+00 Gross Alpha Radioactivity

1. Total Release Ci (1)

(1)

(1)

(1)

(1)

2. Avg. Release Rate

µCi/sec (1)

(1)

(1)

(1)

(1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements ofTRM Section 3.11 Page 10 of90

EFFLUENT AND WASTE DISPOSAL REPORT TABLE lC GASEOUS EFFLUENTS - MIXED MODE RELEASES - CONTINUOUS MODE Unit 1 REPORT FOR Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission and Activation Gases Xe-133 Ci (1) 4.21E-02 1.33E-02 3.21E-01 3.76E-01 Totals for Ci (1) 4.21E-02 l.33E-02 3.21E-01 3.76E-01 Iodines

• • No Nuclide Activities **

(1)

(1)

(1)

(1)

{l)

Particulates Half Life >= 8 days

• • No Nuclide Activities**

(1)

(1)

(1)

(1)

(1)

Carbon-14 C-14 Ci 1.lOE+00 1.llE+00 8.75E-01 1.l0E+00 4.18E+00 Totals for Ci 1.lOE+00 1.llE+00 8.75E-01 1.l0E+00 4.18E+00 Tritium H-3 Ci 6.16E+00 2.44E+00 2.33E+00 5.24E+00 l.62E+0l Totals for Ci 6.16E+00 2.44E+00 2.33E+00 5.24E+00 1.62E+0l Gross Alpha Radioactivity

• • No Nuclide Activities**

(1)

(1)

(1)

(1)

(1)

{l) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements ofTRM Section 3.11 Page 11 of 90

EFFLUENT AND WASTE DISPOSAL REPORT TABLE lC GASEOUS EFFLUENTS - MIXED MODE RELEASES - BATCH MODE Unit 1 REPORT FOR Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission and Activation Gases Ar-41 Ci 7.02E-02 7.52E-02 7.29E-02 7.04E-02 2.89E-01 Kr-85m Ci (1)

(1) 1.35E-04 (1) l.35E-04 Kr-88 Ci (1)

(1) l.73E-05 (1) l.73E-05 Xe-131m Ci (1)

(1) 4.73E-04 (1) 4.73E-04 Xe-133m Ci (1)

(1) 1.41E-03 3.72E-05 l.44E-03 Xe-133 Ci 2.29E-02 l.llE-02 l.38E-01 6.48E-03 l.78E-01 Xe-135 Ci (1) 5.79E-05 l.0SE-02 l.83E-05 l.06E-02 Totals for Ci 9.31E-02 8.63E-02 2.23E-01 7.69E-02 4.B0E-01 Iodines

• • No Nuclide Activities **

(1)

(1)

(1)

(1)

(1)

Particulates Half Life>= 8 days

• • No Nuclide Activities**

(1)

(1)

(1)

(1)

(1)

Carbon-14

• • No Nuclide Activities**

(1)

(1)

(1)

(1)

(1)

Tritium H-3 Ci l.77E-01 2.llE-01 l.86E-01 6.90E-02 6.43E-01 Totals for Ci l.77E-01 2.llE-01 l.86E-01 6.90E-02 6.43E-01 Gross Alpha Radioactivity

• • No Nuclide Activities**

(1)

(1)

(1)

(1)

(1)

(1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements ofTRM Section 3.11 Page 12 of 90

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 1C GASEOUS EFFLUENTS - MIXED MODE RELEASES - CONTINUOUS MODE Unit 2 REPORT FOR Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission and Activation Gases Xe-133 Ci (1) 4.21E-02 1.33E-02 3.21E-01 3.76E-01 Totals for Ci (1) 4.21E-02 l.33E-02 3.21E-01 3.76E-01 Iodines

• • No Nuclide Activities**

(1)

(1)

(1)

(1)

(1)

Particulates Half Life>= 8 days

• • No Nuclide Activities**

(1)

(1)

(1)

(1)

(1)

Carbon-14 C-14 Ci l.16E+00 1.12E+0O 1.16E+00 1.17E+00 4.61E+00 Totals for Ci l.16E+00 1.12E+00 l.16E+00 l.17E+00 4.61E+0O Tritium H-3 Ci l.02E+0l l.80E+0l 2.59E+0l 2.60E+0l 8.02E+0l Totals for Ci l.02E+0l 1.80E+0l 2.59E+0l 2.G0E+0l 8.02E+0l Gross Alpha Radioactivity

• • No Nuclide Activities**

(1)

(1)

(1)

(1)

(1)

(1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements ofTRM Section 3.11 Page 13 of90

EFFLUENT AND WASTE DISPOSAL REPORT TABLE lC GASEOUS EFFLUENTS - MIXED MODE RELEASES - BATCH MODE Unit 2 REPORT FOR Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission and Activation Gases Ar-41 Ci 2.23E-02 1.41E-02 2.44E-02 2.92E-02 9.00E-02 Kr-85m Ci (1)

(1) 1.35E-04 (1) l.35E-04 Kr-88 Ci (1)

(1) 1.73E-05 (1) 1.73E-05 Xe-131m Ci (1)

(1) 4.73E-04 (1) 4.73E-04 Xe-133m Ci (1)

(1) 1.41E-03 3.72E-05 1.44E-03 Xe-133 Ci 9.87E-03 4.BOE-03 4.41E-02 l.BOE-02 7.67E-02 Xe-135 Ci (1) 5.79E-05 1.0SE-02 1.83E-05 l.OGE-02 Totals for Ci 3.22E-02 1.90E-02 8.llE-02 4.72E-02 1.79E-01 Iodines

• • No Nuclide Activities**

(1)

(1)

(1)

(1)

(1)

Particulates Half life>= 8 days

• • No Nuclide Activities**

(1)

(1)

(1)

(1)

(1)

Carbon-14

• • No Nuclide Activities**

(1)

(1)

(1)

(1)

(1)

Tritium H-3 Ci 3.38E-02 4.lSE-02 9.92E-02 l.14E-01 2.88E-01 Totals for Ci 3.38E-02 4.lSE-02 9.92E-02 1.14E-01 2.88E-01 Gross Alpha Radioactivity

• • No Nuclide Activities**

(1)

(1)

(1)

(1)

(1)

(1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements ofTRM Section 3.11 Page 14 of90

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2A LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES Unit 1 REPORT FOR 2021 Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission and Activation Products

1. Total Release Ci 4.36E-03 4.39E-03 7.36E-03 4.25E-03 2.04E-02

2. Avg. Diluted Cone.

µCi/ml 1.llE-09 1.lSE-09 l.87E-09 l.08E-09 l.31E-09 Tritium

1. Total Release Ci 7.llE+0l 3.51E+02 5.87E+02 2.56E+02 1.26E+03

2. Avg. Diluted Cone.

µCi/ml 1.82E-05 9.17E-05 l.49E-04 6.53E-05 8.llE-05 Dissolved & Entrained Gases

1. Total Release Ci (1)

(1) 5.14E-04 4.89E-05 5.63E-04

2. Avg. Diluted Cone.

µCi/ml N/A N/A 1.31E-10 1.25E-11 3.GlE-11 Gross Alpha Radioactivity

1. Total Release Ci (1)

(1) 5.14E-04 4.89E-05 5.63E-04 Volume of liquid waste Liters 3.92E+09 3.83E+09 3.93E+09 3.91E+09 1.56E+10 Volume of dil. water Liters 7.83E+09 7.65E+09 7.86E+09 7.83E+09 3.12E+l0 (1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements ofTRM Section 3.11 Page 15 of90

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2A - Batch LIQUID EFFLUENTS-SUMMATION BY RELEASE POINT Unit 1 REPORT FOR 2021 Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission and Activation Products

1. Total Release Ci 4.36E-03 4.39E-03 7.36E-03 4.2SE-03 2.04E-02

2. Avg. Diluted Cone.

µCi/ml 6.97E-06 4.29E-06 S.80E-06 S.SGE-06 S.53E-06 Tritium

1. Total Release Ci S.29E+0l 3.39E+02 4.96E+02 2.24E+02 1.11E+03

2. Avg. Diluted Cone.

µCi/ml 8.44E-02 3.31E-01 3.91E-01 2.94E-01 3.02E-01 Dissolved & Entrained Gases

1. Total Release Ci (1)

(1)

S.14E-04 4.89E-0S S.63E-04

2. Avg. Diluted Cone.

µCi/ml N/A N/A 4.0GE-07 6.40E-08 1.53E-07 Gross Alpha Radioactivity

1. Total Release Ci (1)

(1)

S.14E-04 4.89E-0S 5.63E-04 Volume of liquid waste Liters 6.26E+0S 1.02E+06 1.27E+06 7.64E+0S 3.68E+06 Volume of dil. water Liters 0.00E+00 0.00E+00 0.00E+0O 0.O0E+00 3.12E+l0 (1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements ofTRM Section 3.11 Page 16 of 90

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2A - Continuous LIQUID EFFLUENTS - SUMMATION BY RELEASE POINT Unit 1 REPORT FOR 2021 Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission and Activation Products

1. Total Release Ci (1)

(1)

(1)

(1)

(1)

2. Avg. Diluted Cone.

µCi/ml N/A N/A N/A N/A N/A Tritium

1. Total Release Ci 1.83E+0l 1.23E+0l 9.06E+0l 3.13E+0l l.52E+02

2. Avg. Diluted Cone.

µCi/ml 4.67E-06 3.21E-06 2.31E-05 7.99E-06 9.78E-06 Dissolved & Entrained Gases

1. Total Release Ci (1)

(1)

(1)

(1)

(1)

2. Avg. Diluted Cone.

µCi/ml N/A N/A N/A N/A N/A Gross Alpha Radioactivity

1. Total Release Ci (1)

(1)

(1)

(1)

(1)

Volume of liquid waste Liters 3.91E+09 3.83E+09 3.93E+09 3.91E+09 1.56E+l0 Volume of dil. water Liters 7.83E+09 7.65E+09 7.86E+09 7.83E+09 3.12E+l0 (1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements ofTRM Section 3.11 Page 17 of90

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2A LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES Unit 2 REPORT FOR 2021 Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission and Activation Products

1. Total Release Ci 4.36E-03 4.39E-03 7.36E-03 4.25E-03 2.04E-02

2. Avg. Diluted Cone.

µCi/ml 1.llE-09 1.lSE-09 1.87E-09 1.08E-09 1.31E-09 Tritium

1. Total Release Ci 7.llE+0l 3.51E+02 5.87E+02 2.56E+02 1.26E+03

2. Avg. Diluted Cone.

µCi/ml 1.82E-05 9.17E-05 1.49E-04 6.53E-05 8.llE-05 Dissolved & Entrained Gases

1. Total Release Ci (1)

(1) 5.14E-04 4.89E-05 S.63E-04

2. Avg. Diluted Cone.

µCi/ml N/A N/A l.31E-10 l.25E-11 3.61E-11 Gross Alpha Radioactivity

1. Total Release Ci (1)

(1) 5.14E-04 4.89E-05 5.63E-04 Volume of liquid waste Liters 3.92E+09 3.83E+09 3.93E+09 3.91E+09 1.56E+l0 Volume of dil. water Liters 7.83E+09 7.65E+09 7.86E+09 7.83E+09 3.12E+l0 (1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements ofTRM Section 3.11 Page 18 of90

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2A - Batch LIQUID EFFLUENTS - SUMMATION BY RELEASE POINT Unit2 REPORT FOR 2021 Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission and Activation Products

1. Total Release Ci 4.36E-03 4.39E-03 7.36E-03 4.25E-03 2.04E-02

2. Avg. Diluted Cone.

µCi/ml 6.97E-06 4.29E-06 5.B0E-06 5.SGE-06 5.53E-06 Tritium

1. Total Release Ci 5.29E+0l 3.39E+02 4.96E+02 2.24E+02 l.11E+03

2. Avg. Diluted Cone.

µCi/ml 8.44E-02 3.31E-01 3.91E-01 2.94E-01 3.02E-01 Dissolved & Entrained Gases

1. Total Release Ci (1)

(1) 5.14E-04 4.89E-05 5.63E-04

2. Avg. Diluted Cone.

µCi/ml N/A N/A 4.0GE-07 6.40E-08 l.53E-07 Gross Alpha Radioactivity

1. Total Release Ci (1)

(1) 5.14E-04 4.89E-05 5.63E-04 Volume of liquid waste Liters 6.26E+0S l.02E+06 1.27E+06 7.64E+0S 3.68E+06 Volume of dil. water Liters 0.00E+00 0.0OE+00 O.00E+0O 0.00E+00 3.12E+l0 (1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements ofTRM Section 3.11 Page 19 of90

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2A - Continuous LIQUID EFFLUENTS - SUMMATION BY RELEASE POINT Unit 2 REPORT FOR 2021 Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission and Activation Products

1. Total Release Ci (1)

{l)

{l)

{l)

(1)

2. Avg. Diluted Cone.

µCi/ml N/A N/A N/A N/A N/A Tritium

1. Total Release Ci 1.83E+0l l.23E+0l 9.06E+0l 3.13E+0l 1.52E+02

2. Avg. Diluted Cone.

µCi/ml 4.67E-06 3.21E-06 2.31E-05 7.99E-06 9.78E-06 Dissolved & Entrained Gases

1. Total Release Ci

{l)

(1)

(1)

(1)

(1)

2. Avg. Diluted Cone.

µCi/ml N/A N/A N/A N/A N/A Gross Alpha Radioactivity

1. Total Release Ci (1)

(1)

(1)

(1)

(1)

Volume of liquid waste Liters 3.91E+09 3.83E+09 3.93E+09 3.91E+09 l.56E+l0 Volume of dil. water Liters 7.83E+09 7.65E+09 7.86E+09 7.83E+09 3.12E+l0 (1) Less than minimum detectable activity which meets the lower limit of detection {LLD) requirements of TRM Section 3.11 Page 20 of90

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 28 LIQUID EFFLUENTS - BATCH MODE Unit 1 REPORT FOR Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission and Activation Products Te-123m Ci 1.78E-06 (1) 4.26E-05 5.52E-05 9.96E-05 Cr-51 Ci (1)

(1) 2.48E-03 l.24E-03 3.73E-03 Mn-54 Ci l.75E-05 3.44E-06 4.48E-05 3.25E-05 9.83E-05 Fe-59 Ci (1)

(1) 1.82E-05 (1) 1.82E-05 Co-57 Ci 5.54E-06 2.26E-05 2.90E-05 (1) 5.72E-05 Co-58 Ci l.58E-03 2.00E-03 l.77E-03 7.53E-04 6.lOE-03 Co-60 Ci 4.86E-04 5.92E-04 l.58E-03 6.98E-04 3.36E-03 Ni-63 Ci 4.38E-04 1.36E-03 9.57E-04 (1) 2.76E-03 Zr-95 Ci (1)

(1) 6.78E-05 l.71E-05 8.49E-05 Nb-95 Ci 8.71E-06 (1) l.0SE-04 6.99E-05 l.84E-04 Sb-124 Ci (1)

(1) l.76E-05 7.19E-05 8.94E-05 Sb-125 Ci 2.36E-05 l.96E-04 8.17E-05 5.32E-04 8.34E-04 Te-125m Ci l.80E-03 2.lOE-04 (1) 7.74E-04 2.79E-03 Te-132 Ci (1)

(1) 7.32E-05 (1) 7.32E-05 1-132 Ci (1)

(1) 8.34E-05 (1) 8.34E-05 Totals for Ci 4.36E-03 4.39E-03 7.36E-03 4.25E-03 2.04E-02 Tritium H-3 Ci 5.29E+0l 3.39E+02 4.96E+02 2.24E+02 l.11E+03 Totals for Ci 5.29E+0l 3.39E+02 4.96E+02 2.24E+02 l.11E+03 Dissolved and Entrained Gases Ar-41 Ci (1)

(1)

(1) l.63E-06 l.63E-06 Xe-133 Ci (1)

(1) 5.12E-04 4.73E-05 5.59E-04 Xe-135 Ci (1)

(1) 2.22E-06 (1) 2.22E-06 Totals for Ci (1)

(1) 5.14E-04 4.89E-05 5.63E-04 Gross Alpha Radioactivity

• • No Nuclide Activities**

(1)

(1)

(1)

(1)

(1)

(1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements ofTRM Section 3.11 Page 21 of 90

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 28 LIQUID EFFLUENTS - CONTINUOUS MODE Unit 1 REPORT FOR Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission and Activation Products

• • No Nuclide Activities**

(1)

(1)

(1)

(1)

(1)

Tritium H-3 Ci l.83E+0l l.23E+0l 9.0GE+0l 3.13E+0l l.52E+02 Totals for Ci 1.83E+0l l.23E+0l 9.0GE+0l 3.13E+0l 1.52E+02 Dissolved and Entrained Gases

• • No Nuclide Activities**

(1)

(1)

(1)

(1)

(1)

Gross Alpha Radioactivity

• • No Nuclide Activities**

(1)

(1)

(1)

(1)

(1)

(1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements of TRM Section 3.11 Page 22 of90

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2B LIQUID EFFLUENTS-BATCH MODE Unlt2 REPORT FOR Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission and Activation Products Te-123m Ci

1. 78E-06 (1) 4.26E-05 5.52E-05 9.96E-05 Cr-51 Ci (1)

(1) 2.48E-03 l.24E-03 3.73E-03 Mn-54 Ci 1.75E-05 3.44E-06 4.48E-05 3.25E-05 9.83E-05 Fe-59 Ci (1)

(1) l.82E-05 (1) l.82E-05 Co-57 Ci 5.54E-06 2.26E-05 2.90E-05 (1) 5.72E-05 Co-58 Ci l.SBE-03 2.00E-03 l.77E-03 7.53E-04 6.lOE-03 Co-60 Ci 4.86E-04 5.92E-04 l.58E-03 6.98E-04 3.36E-03 Ni-63 Ci 4.38E-04 l.36E-03 9.57E-04 (1) 2.76E-03 Zr-95 Ci (1)

(1) 6.78E-05 l.71E-05 8.49E-05 Nb-95 Ci 8.71E-06 (1) l.OSE-04 6.99E-05 l.84E-04 Sb-124 Ci (1)

(1) 1.76E-05 7.19E-05 8.94E-05 Sb-125 Ci 2.36E-05 l.96E-04 8.17E-05 5.32E-04 8.34E-04 Te-125m Ci l.80E-03 2.l0E-04 (1) 7.74E-04 2.79E-03 Te-132 Ci (1)

(1) 7.32E-05 (1) 7.32E-05 1-132 Ci (1)

(1) 8.34E-05 (1) 8.34E-05 Totals for Ci 4.36E-03 4.39E-03 7.36E-03 4.25E-03 2.04E-02 Tritium H-3 Ci 5.29E+0l 3.39E+02 4.96E+02 2.24E+02 l.11E+03 Totals for Ci 5.29E+0l 3.39E+02 4.96E+02 2.24E+02 1.11E+03 Dissolved and Entrained Gases Ar-41 Ci (1)

(1)

(1) l.63E-06 l.63E-06 Xe-133 Ci (1)

(1) 5.12E-04 4.73E-05 5.59E-04 Xe-135 Ci (1)

(1) 2.22E-06 (1) 2.22E-06 Totals for Ci (1)

(1) 5.14E-04 4.89E-05 5.63E-04 Gross Alpha Radioactivity

• • No Nuclide Activities**

(1)

(1)

(1)

(1)

(1)

(1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements ofTRM Section 3.11 Page 23 of90

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2B LIQUID EFFLUENTS - CONTINUOUS MODE Unit2 REPORT FOR Units QTR 1 QTR2 QTR3 Fission and Activation Products

• • No Nuclide Activities**

(1)

(1)

(1)

Tritium H-3 Ci l.83E+0l 1.23E+0l 9.06E+0l Totals for Ci l.83E+0l 1.23E+0l 9.06E+0l Dissolved and Entrained Gases

• No Nuclide Activities * *

(1)

(1)

(1)

Gross Alpha Radioactivity

• • No Nuclide Activities**

(1)

(1)

(1)

QTR4 (1) 3.13E+0l 3.13E+0l (1)

(1)

YEAR (1) l.52E+02 l.52E+02 (1)

(1)

(1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements ofTRM Section 3.11 Page 24 of90

EFFLUENT AND WASTE DISPOSAL REPORT Summary of Gaseous and Liquid Effluents Doses to Members of the Public at the Highest Dose Receptors vs 10CFRS0 Design Objectives Unit 1

%of Design Noble Gas Applicable Dose Estimated Age Group Applicable Objective Limit Dose (per year, Limit combined)

Maximum Location Gamma Air Dose 1.68E-04 All l.68E-03 10 Maximum Location Beta Air Dose 7.12E-05 All 3.56E-04 20 Maximum Location Total Body 1.59E-04 All 3.17E-03 5

Maximum Location Skin 2.31E-04 All l.54E-03 15 Non-Noble Gas Maximum Individual Bone 1.09E+OO Child 7.28E+OO 15 Liquid Maximum Individual Total Body 1.26E-02 Child 4.19E-01 3

Maximum Individual GI-Lli 1.50E-02 Adult 1.50E-01 10 EFFLUENT AND WASTE DISPOSAL REPORT Summary of Gaseous and Liquid Effluents Doses to Members of the Public at the Highest Dose Receptors vs 10CFRS0 Design Objectives Noble Gas Maximum Location Maximum Location Maximum Location Maximum Location Non-Noble Gas Maximum Individual Liquid Maximum Individual Maximum Individual Unit2

%of Applicable Dose Estimated Age Group Applicable Dose Limit Gamma Air Dose 5.91E-05 All 5.91E-04 Beta Air Dose 3.65E-05 All l.83E-04 Total Body 5.51E-05 All 1.lOE-03 Skin 8.40E-05 All 5.60E-04 Bone 1.20E+OO Child 8.03E+OO Total Body 1.26E-02 Child 4.19E-01 GI-Lli 1.50E-02 Adult 1.SOE-01 EFFLUENT AND WASTE DISPOSAL REPORT Summary of Doses to Members of the Public Design Objective Limit (per year, combined) 10 20 5

15 15 3

10 at the Highest Dose Receptors for 40CFR190 and 10CFR72.104 Compliance Highest Dose Non-Noble On-Site

%of Noble Gas Liquid Storage Total Applicable Limit Receptors Gas Facilities Limit Total Body 2.14E-04 4.77E-01 2.52E-02 O.OOE+OO 5.02E-01 2.0lE+OO 25 Organ Dose N/A 2.30E+OO 3.00E-02 O.OOE+OO 2:33E+OO 9.30E+OO 25 Thyroid Dose N/A 4.77E-01 2.SOE-02 0.00E+OO 5.02E-01 6.69E-01 75 Page 25 of90 Unit mrad mrad mrem mrem mrem mrem mrem Unit mrad mrad mrem mrem mrem mrem mrem Unit mrem mrem mrem

SOLID RADIOACTIVE WASTE FOR BURIAL 1 5T QUARTER 2021 DATE DISPOSITION OF MATERIAL MODE OF DESTINATION VOLUME (m3)

CURIES*

Shipment#

(DESCRIPTION, CLASS, TYPE AND TRANSPORT/

PER PER Description SOLIDIFYING AGENT)

CARRIER SHIPMENT SHIPMENT 1/20/21 Highway RWS21-01 UN3321, RADIOACTIVE MATERIAL, LOW SPECIFIC Energy Solutions DAW ACTIVITY (LSA-11), 7, METAL BOX(1), CLASS A, NONE Hittman Transport Bear Creek Facility 1.74E+01 2.96E-01 EXCLUSIVE-USE Oak Ridge, TN Quarterly Totals Number of 1

1.74E+01 2.96E-01 Shipments:

• Calculated using measured ratios CUBIC M CURIES SOLID RADIOACTIVE WASTE FOR BURIAL 2ND QUARTER 2021 DATE DISPOSITION OF MATERIAL MODE OF VOLUME CURIES*

Shipment#

(DESCRIPTION, CLASS, TYPE AND TRANSPORT/

DESTINATION

{m3} PER PER Description SOLIDIFYING AGENT)

CARRIER SHIPMENT SHIPMENT 4/6/21 UN3321, RADIOACTIVE MATERIAL, LOW SPECIFIC Highway RWS21-02 Energy Solutions DEWATERED ACTIVITY (LSA-11), 7,METAL CASK(1), CLASS A, Hittman Transport Clive, UT 4.53E+OO 2.24E+OO RESIN NONE EXCLUSIVE-USE 4/13/21 UN3321, RADIOACTIVE MATERIAL, LOW SPECIFIC Highway RWS21-03 Energy Solutions OEWATERED ACTIVITY (LSA-11), 7,METAL CASK(1), CLASS A, Hittman Transport Clive, UT 4.B1E+OO 2.52E+OO RESIN NONE EXCLUSIVE-USE 4/20/21 UN3321, RADIOACTIVE MATERIAL, LOW SPECIFIC Highway RWS21-04 Energy Solutions DEWATERED ACTIVITY (LSA-11), 7,METAL CASK(1), CLASS A, Hittman Transport Clive, UT 4.53E+OO 3.03E+OO RESIN NONE EXCLUSIVE-USE 4/27/21 UN3321, RADIOACTIVE MATERIAL, LOW SPECIFIC Highway RWS21-05 ACTIVITY (LSA-11), 7,METAL CASK(1), CLASS A, Hittman Transport Energy Solutions 4.53E+OO B.19E+OO OEWATERED NONE EXCLUSIVE-USE Clive, UT RESIN 5/18/21 UN2916, RADIOACTIVE MATERIAL, TYPE B(U)

Highway Waste Control SR-2256-0016 DEWATERED PACKAGE, 7 FISSILE EXCEPTED, RQ-Hittman Transport Specialist LLC 3.37E+OO 2.36E+02 BEAD RESIN RADIONUCLIDES, TYPE B CASK EXCLUSIVE-USE Andrews, TX 5/25/21 UN2916, RADIOACTIVE MATERIAL, TYPE B(U)

Highway Waste Control SR-2256-0017 DEWATERED PACKAGE, 7 FISSILE EXCEPTED, RQ-Hittman Transport Specialist LLC 3.37E+OO 1.41E+02 BEAD RESIN RADIONUCLIDES, TYPE B CASK EXCLUSIVE-USE Andrews, TX 6/3/21 UN2916, RADIOACTIVE MATERIAL, TYPE B(U)

Highway Waste Control SR-2256-0018 DEWATERED PACKAGE, 7 FISSILE EXCEPTED, RO-Hittman Transport Specialist LLC 3.37E+OO 6.29E+01 BEAD RESIN RADIONUCLI0ES, TYPE B CASK EXCLUSIVE-USE Andrews, TX Quarterly Totals Number of 7

2.85E+01 4.56E+02 Shipments:

• Calculated using measured ratios CUBIC M CURIES Page 26 of90

SOLID RADIOACTIVE WASTE FOR BURIAL 3Ro QUARTER 2021 DATE DISPOSITION OF MATERIAL MODE OF VOLUME(m3)

CURIES* PER Shipment#

(DESCRIPTION, CLASS, TYPE AND TRANSPORT/

DESTINATION Description SOLIDIFYING AGENT)

CARRIER PER SHIPMENT SHIPMENT 8/4/21 UN3321, RADIOACTIVE MATERIAL, LOW Highway Bear Creek RWS21-09 SPECIFIC ACTIVITY (LSA-11), 7, METAL BOX(1),

Hittman Transport Oak Ridge, TN 6.80E+01 1.28E-02 DAW CLASS A, NONE EXCLUSIVE-USE 8/23/21 UN3321, RADIOACTIVE MATERIAL, LOW Highway Bear Creek RWS21 -010 SPECIFIC ACTIVITY (LSA-11), 7,METAL BOX(1),

Hittman Transport Oak Ridge, TN 6.80E+01 8.89E-02 DAW CLASS A, NONE EXCLUSIVE-USE 9/28/21 UN3321, RADIOACTIVE MATERIAL, LOW Highway Gallaher Road RWS21-13 SPECIFIC ACTIVITY (LSA-11), 7,METAL BOX(1),

Hittman Transport Processing Facility 1.78E+01 9.21E-03 RESIN CLASS A, NONE EXCLUSIVE-USE Kingston, TN 9/30/21 UN3321, RADIOACTIVE MATERIAL, LOW Highway Bear Creek RWS21-11 SPECIFIC ACTIVITY (LSA-11), 7,METAL BOX(1),

Hittman Transport Oak Ridge, TN 6.71E+01 8.54E-02 DAW CLASS A, NONE EXCLUSIVE-USE Quarterly Totals Number of 4

2.21E+02 1.96E-01 Shipments:

• Calculated using measured ratios CUBIC M CURIES SOLID RADIOACTIVE WASTE FOR BURIAL 4TH QUARTER 2021 DATE DISPOSITION OF MATERIAL MODE OF VOLUME(m3)

CURIES*

Shipment#

(DESCRIPTION, CLASS, TYPE TRANSPORT/

DESTINATION PER PER Description AND SOLIDIFYING AGENT)

CARRIER SHIPMENT SHIPMENT 10/1/21 UN3321, RADIOACTIVE MATERIAL, LOW Highway Gallaher Road RWS21-12 RADWASTE SPECIFIC ACTIVITY (LSA-11), 7, METAL B0X(1),

Hittman Transport Processing Facility 1.53E+01 9.51E-03 RESIN CLASS A, NONE EXCLUSIVE-USE Kingston, TN Quarterly Totals Number of 1

1.53E+01 9.51E-03 Shipments:

• Calculated using measured ratios CUBIC M CURIES Page 27 of 90

Resins, Filters, Evap Bottoms 2021 Volume(mJ) 5.15E+01 Class A

Nuclide

%Abund Curles H-3 50.63 8.12Ei()()

C-14 1-61 2.58E-01 Mn-54 0.68 1.lOE-01 Fe-55 0.96 1.54E-01 Co.57 0.28 4,SlE-02 Co.58 29.4 4.nEi()()

Co-60 7.28 1.17Ei()()

Ni-59 0.04 6.93E-03 Ni-63 1.11 1.25Ei()()

Sr-89 0.00 7.66E-05 Nl>-95 0.06 9.25E-03 Tc-99 0.00 4.95E-04 Sl>-125 1.23 1,98E-01 Cs-137 0.05 7.70E-03 Ce-144 0.00 2.48E-04 Am-241 0.00 1.84E-05 SOLID RADIOACTIVE WASTE FOR BURIAL Estimated Solid Waste Composition 2021 Resins, Filters, Evap Bottoms 2021 Volume (mJ) 1.01E+01 Volume (m3)

Class 8

Class uCl/ml Nuclide

%Abund Curles uCl/ml Nuclide 1.58E-01 H-3 1.02 4.49Ei()() 4.4SE-01 H-3 5.0lE-03 C-14 0.04 1.67E+ol 1.65Ei()()

Mn-54 2.14E-03 Mn-54 2.67 1.18E+ol 1.17Ei()()

Fe-55 2.99E-03 Fe-55 11.75 5.18E+o1 5.13Ei()()

Co-57 8.76E-04 Co.57 0.24 1.06Ei()() 1.0SE-01 Co-58 9.17E-02 Co-58 2.59 1.14E+ol 1.13Ei()()

Co-60 2.27E-02 Co-60 27.02 1.19E+o2 1.18E+ol Ni-63 1.3SE-04 Ni-59 0.39 1.73Ei()() 1.71E-01 Zr-95 2.43E-02 Ni-63 52.66 2.32E+o2 2.30E+Ol Nb-95 1.49E-06 Zn-65 0.37 1.64Ei()() 1.62E-01 Sb-125 1.BOE-04 Sr-90 0.01 4.SOE-02 4.46E-03 cs-137 9.61E-06 Sl>-125 0.68 2.99Ei()() 2.96E-01 ce-144 3.84E-03 Cs-137 0.53 2.32E+oo 2.30E-01 Pu-238 1.SOE-04 Ce-144 0.00 2.75E-03 2.nE-04 Am-241 4.82E-06 Pu-238 o.oo 2.07E-04 2.0SE-05 3.57E-07 Irradiated Components 2021 Volume (m3)

O.OOE+OO Volume (m3)

Class NIA Class No Shipments Page 28 of90 Dry Active Waste 2021 2.20E+02 A

%Abund Curles uCl/ml 0.63 3.06E-03 1.39E-05 1.54 7.47E-03 3.40E-05 41.10 l.99E-01 9.0SE-04 0.13 6.28E-04 2.BSE-06 7.49 3.62E-02 1.65E-04 30.S3 1.48E-Ol 6.73E-04 13.44 6.SOE-02 2.95E-04 0.69 3.35E-03 1.52E-05 1.40 6.78E-03 3.0BE-05 2.30 1.llE-02 5.0SE-05 0.52 2.54E-03 1.lSE-05 0.21 1.03E-03 4.68E-06 o.oo 1.57E-05 7.14E-08 0.00 2.14E-OS 9.73E-08 other Waste 2021 O.OOE+OO A

No Shioments

Sum of All Cateaories 2021 Volume (m3) 2. 72E+02 Class A

Nuclide

%Abund Curies H-3 49.17 8 13E+OO Be-7 C-14 1.56 2.58E-01 Cr-51 Mn-54 0.71 1.17E-01 Fe-55 2.13 3.52E-01 Co-57 0.28 4.57E-02 Co-58 28.76 4.75E+OO Co-60 7.96 1.32E+OO Ni-59 0.04 6.93E-03 Ni-63 7.94 1.31E+OO Sr-89 0.00 7.66E-05 Zr-95 0.02 3.35E-03 Nb-95 0.10 1.60E-02 Tc-99 0.00 4.95E-04 Sb-125 1 26 2.09E-01 Cs-137 0.06 1.02E-02 Ce-144 0.01 1.27E-03 Pu-238 0.00 1.57E-05 Am-241 0.00 3.97E-05 SOLID RADIOACTIVE WASTE FOR BURIAL Estimated Solid Waste Composition 2021 Sum of All Cateaories 2021 Volume (m3) 1.01E+01 Volume (m3)

Class B

Class uCi/ml Nuclide

%Abund Curies uCi/ml Nuclide 2.99E-02 H-3 1.02 4.49E+OO 4.45E-01 H-3 O.OOE+OO C-14 0.04 1.67E+01 1.65E+OO C-14 9.49E-04 Mn-54 2.67 1.18E+01 1.17E+OO Mn-54 O.OOE+OO Fe-55 11.75 5.18E+01 5.13E+OO Fe-55 4.JOE-04 Co-57 0.24 1.06E+OO 1.05E-01 Zr-95 1.29E-03 Co-58 2.59 1.14E+01 1.13E+OO Co-57 1.68E-04 Co-60 27.02 1.19E+02 1.18E+01 Co-58 1.75E-02 Ni-59 0.39 1.73E+OO 1.71E-01 Co-60 4.85E-03 Ni-63 52.66 2.32E+02 2.30E+01 Ni-59 2.55E-05 Zn-65 0.37 1.64E+OO 1.62E-01 Ni-63 4.82E-03 Sr-90 0.01 4.50E-02 4.46E-03 Zn-65 2.82E-07 Sb-125 0.68 2.99E+OO 2.96E-01 Sr-89 1.23E-05 Cs-137 0.53 2.32E+OO 2.30E-01 Sr-90 5.88E-05 Ce-144 0.00 2.75E-03 2.72E-04 Nb-95 1.82E-06 Pu-238 0.00 2.07E-04 2.0SE-05 Tc-99 7.68E-04 Pu-238 3.75E-05 Pu-239 4.67E-06 Sb-125 5.TTE-08 Cs-137 1.46E-07 Ce-144 Pu-241 Am-241 Cm-242 Cm-244 Page 29 of90 Total Combined 2021 2.82E+02 A&B

%Abund Curies uCi/ml 2.76 1.26E+01 4.47E-02 0.09 4.24E-01 1.50E-03 2.60 1.19E+01 4.22E-02 11.41 5.22E+01 1.85E-01 0.00 3.35E-03 1.19E-05 0.24 1.11E+OO 3.94E-03 3.54 1.62E+01 5.74E-02 26.33 1.20E+02 4.26E-01 0.38 1.74E+OO 6.17E-03 51.05 2.34E+02 8.JOE-01 0.36 1.64E+OO 5.82E-03 0.00 7.66E-05 2.72E-07 0.01 4.50E-02 1.60E-04 0.00 1.60E-02 5.67E-05 0.00 4.95E-04 1 76E-06 0.00 2.23E-04 7.91E-07 0.00 6.14E-05 2.18E-07 0.70 3.20E+OO 1.13E-02 0.51 2.33E+OO 8.26E-03 0.00 4.03E-03 1.43E-05 0.02 1.12E-01 3.97E-04 0.00 2.49E-04 8.83E-07 0.00 3.06E-06 1.09E-08 0.00 2.57E-04 9.11E-07

Process Control Program (PCP) for Radioactive Wastes There were no changes to RW-AA-100, Process Control Program (PCP) for Radioactive Waste, in 2021.

Page 30 of90

Error Analysis The following is an estimate of the errors associated with effluent monitoring and analysis. The estimate is calculated using the square root of the sum of the squares methodology.

1.

Gaseous Effluents Qme=3.33%

RM=N/A ECe=5%

Stdcse/Smplcse=5%

me=N/A Total error= 7.8%

2.

Liquid Effluents Qme=3.33%

RM=N/A ECe=N/A Stdcse/Smplcse=5%

qme=2.22%

Total error= 6.4%

3.

Waste Resin Qme=10.0%

RM=N/A ECe=5%

Stdcse/Smplcse=5%

me=1.0%

Total error= 12.3%

4.

DAW, Mechanical Filters, and Contaminated Metal Qme=10.0%

RM=N/A ECe=N/A Stdcse/Smplcse=5%

qme=N/A Instrument calibration error = 10%

Total error= 11.2%

Qme = the process quantity measurement error associated with the release point (e.g. flow, level measurements)

RM= error associated with the radiation monitor used in quantifying releases through the release point ECe = error associated with the collection efficiency of the sample media Stdcse = one-sigma counting error associated with the counting instrument of interest Smplcse = one-sigma counting error associated with a sample of a given geometry that is used for the release point of interest qme = sample quantity measurement error associated with the sample of interest Page 31 of90

Miscellaneous Information A. As required by Technical Specification 5.6.2, meteorological and environmental impact information is reported in the 2021 Annual Radiological Environmental Operating Report (AREOR) or is retained on file to be provided upon request.

B. No limits were exceeded during the 2021 reporting period in liquid hold up tanks or waste gas decay tanks as stated in Technical Specification 5.5.12.

C. There were no irradiated fuel shipments during the 2021 reporting period. An Independent Spent Fuel Storage Installation (ISFSI) campaign began in 2010 when used fuel was removed from the Spent Fuel Pool (SFP), placed into six (6) casks, each containing 32 fuel bundles, and transferred to an outdoor storage pad. No additional casks were placed on the pad in 2011. In 2012, eight (8) additional casks were placed on the pad for a total of fourteen (14) casks. No additional casks were placed on the pad in 2013 or 2014. In 2015, six (6) additional casks were placed on the pad for a total of twenty (20) casks.

In 2016, six (6) additional casks were placed on the pad. No additional casks were placed on the pad in 2017. In 2018, five (5) additional casks were placed on the pad. In 2019, six (6) additional cask were placed on the pad. In 2020, no additional cask were added. In 2021, six (6) additional cask were placed on the pad for a total of forty-three (43) Prior to the first ISFSI campaign, additional dosimeters were placed at the site boundary nearest to the storage pad (in between the pad and the nearest resident) for the purpose of measuring any potential offsite dose to the public from the storage pad. Since the dosimeters were placed, data from the dosimeters, when compared to the existing environmental dosimeters in the surrounding area, have shown no statistical difference. As a result, there is currently no offsite dose contribution from the ISFSI facility or any other on-site storage facility, including the Dry Active Waste (DAW) Building and the Old Steam Generator (OSG) Storage Building, as evidenced by dosimetry data that is indistinguishable from the existing environmental dosimeters.

D. There were no effluent releases or offsite dose calculations that exceeded technical specification or TRM limits during the 2021 reporting period. There were no REMP sample results that exceeded TRM or analytical result investigation levels.

E. There were no elevated releases during the 2021 reporting period. All planned gaseous releases are considered mixed mode releases and were discharged by way of the plant vent stacks.

F. On 1/30/2021 the 1PR03J went in to LOCAR due to a loss of flow alarm. The skid would not restart.

Compensatory sampling started with 1 x per every 8 hrs. It was determined that the worked to fix the monitor could not take place while the unit was on line and would have to be repaired during B 1 R24 in September. The skid was repaired and returned to service in Oct 2021 which exceeded the TRM 3.11.b operability time G. There were no unplanned gaseous or liquid releases to unrestricted areas during the 2021 reporting period.

H. All Rock River flow measurements during liquid effluent discharges were obtained from the U.S.

Geological Survey Byron Gauging Station for the Rock River with the following exceptions. Due to icing conditions near the Byron gauging stations 2/18/21, 2/23/21, 2/25/21, 3/1/21, flow was obtained from the Dixon flow gauge, located approximately 30 miles downstream of the Byron flow gauge.

I.

Attached are offsite dose calculation reports for January through December of 2021.

Page 32 of90

The following are the maximum annual calculated cumulative offsite doses resulting from Bryon airborne releases in 2021 based on concurrent meteorological data:

Unit 1:

Dose gamma air 11>

beta air <2>

whole body t31 skin 1*>

organ cs, (child-bone)

Maximum Value 2.960 x 10*5 mrad 1.610 x 10-5 mrad 6.530 x 10-2 mrem

3. 300 x 10*5 mrem 3.210 x 10*1 mrem Unit 1 Compliance Status 10 CFR 50 Appendix I Yearly Objective gamma air beta air whole body skin organ Unit 2:

Dose gamma air <11 beta air (21 whole body 131 skin <41 organ 15J (child-bone) 10.0 mrad 20.0 mrad 5.0 mrem 150 mrem 15.0 mrem Maximum Value 1.040 x 10*5 mrad 8.320 x 10*6 mrad 7.570 x 10*2 mrem 1.230 x 10-5 mrem 3.550 x 10*1 mrem Unit 2 Compliance Status 10 CFR 50 Appendix I Yearly Objective gamma air 10.0 mrad beta air 20.0 mrad whole body 5.0 mrem skin 15.0 mrem organ 15.0 mrem 11 Gamma Air Dose - GASPAR II, NUREG-0597 1a1 Beta Air Dose - GASPAR 11, NUREG-0597 131 Whole Body Dose* GASPAR II. NUREG-0597 t*I Skin Dose - GASPAR II. NUREG-0597 151 Inhalation and Food Pathways Dose - GASPAR 11, NUREG-0597 Page 33 of90 Sector Affected North-Northwest North-Northwest North-Northwest North-Northwest North-Northwest

% of Appendix I 0.00 0.00 1.31 0.00 2.14 Sector Affected North-Northwest North-Northwest North-Northwest North-Northwest North-Northwest

% of Appendix I 0.00 0.00 1.51 0.00 2.37

Gaseous Nuclide LLD (uCl/cc)

H3 4.26E-08 Mn54 3.86E-14 Co58 3.54E-14 Fe59 9.09E-14 Co60 4.56E-14 Zn65 6.28E-14 Kr87 2.69E-08 Kr88 4.77E-08 Sr89 1.79E-14 Sr-90 2.87E-15 Mo99 6.85E-14 1131 6.25E-14 1133 2.86E-13 Xe133 3.00E-08 Xe133m 1.1 7E-07 Cs134 4.09E-14 Xe135 1.12E-08 Cs137 4.24E-14 Xe138 5.16E-08 Ce141 6.70E-14 Ce144 2.91E-13 Gross Alpha 2.67E-15 Attachment A, 2021 Radioactive Effluent Release Report 2021 Lower Limits of Detection (LLD's)

Required Gaseous LLD (uCl/cc)

Nuclide 1.00E-07 H3 1.00E-11 Mn54 1.00E-11 Fe55 1.00E-11 Co58 1.00E-11 Fe59 1.00E-11 Co60 1.00E-04 Zn65 1.00E-04 Kr85m 1.00E-11 Kr87 1.00E-11 Kr88 1.00E-11 Sr89 1.00E-12 Sr90 1.00E-10 Mo99 1.00E-04 Xe131m 1.00E-04 1131 1.00E-11 Xe133 1.00E-04 Xe133m 1.00E-11 Cs134 1.00E-04 Xe135 1.00E-11 Cs137 1.00E-11 Xe138 1.00E-11 Ce141 Ce144 Gross Alpha Gross Bela Page 34 of90 Uquld Required LLD (uCl/ml)

Uauld LLD (uCl/cc) 1.70E-06 1.00E-05 1.33E-08 5.00E-07 7.25E-07 1.00E-06 1.12E-08 5.00E-07 2.37E-08 5.00E-07 1.90E-08 5.00E-07 2.81E-08 5.00E-07 1.49E-08 1.00E-05 3.31E-08 1.00E-05 5.75E-08 1.00E-05 4.12E-08 5.00E-08 1.HE-08 5.00E-08 1.18E-07 5.00E-07 5.76E-07 1.00E-05 1.36E-08 1.00E-06 3.07E-08 1.00E-05 1.08E-07 1.00E-05 1.36E-08 5.00E-07 1.89E-08 1.00E-05 1.35E-08 5.00E-07 9.72E-08 1.00E-05 2.26E-08 5.00E-07 9.01E-08 5.00E-06 3.10E-08 1.00E-07 7.69E-08

Wind Direction and Stability Class Byron Generating Station Period of Record: January -

March 2021 Stability Class -

Extremely Unstable 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed ( in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

3 0

0 0

3 NNE 0

0 0

0 0

0 0

NE 0

0 0

0 0

0 0

ENE 0

0 0

0 0

0 0

E 0

0 0

0 0

0 0

ESE 0

0 0

0 0

0 0

SE 0

0 0

0 0

0 0

SSE 0

0 0

0 0

0 0

s 0

0 0

0 0

0 0

SSW 0

0 0

0 0

0 0

SW 0

0 0

0 0

0 0

WSW 0

0 0

0 0

0 0

w 0

0 0

0 0

0 0

WNW 0

0 0

0 0

0 0

NW 0

0 0

0 0

0 0

NNW 0

0 6

0 0

0 6

Variable 0

0 0

0 0

0 0

Total 0

0 9

0 0

0 9

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 35 of90

Byron Generating Station Period of Record: January -

March 2021 Stability Class - Moderately Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 1

1 0

0 0

2 NNE 0

0 0

0 0

0 0

NE 0

0 0

0 0

0 0

ENE 0

0 0

0 0

0 0

E 0

0 0

0 0

0 0

ESE 0

0 0

0 0

0 0

SE 0

0 0

0 0

0 0

SSE 0

0 0

0 0

0 0

s 0

0 0

0 0

0 0

SSW 0

0 0

0 0

0 0

SW 0

0 0

0 0

0 0

WSW 0

0 0

1 0

0 1

w 0

0 0

0 0

0 0

WNW 0

0 0

1 0

0 1

NW 0

0 0

0 0

0 0

NNW 0

0 1

0 0

0 1

Variable 0

0 0

0 0

0 0

Total 0

1 2

2 0

0 5

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 36 of90

Byron Generating Station Period of Record: January -

March 2021 Stability Class - Slightly Unstable

- 250Ft-30Ft Delta-T (Fl Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 1

5 0

0 0

6 NNE 0

0 0

0 0

0 0

NE 0

0 0

0 0

0 0

ENE 0

0 0

0 0

0 0

E 0

0 0

0 0

0 0

ESE 0

0 0

0 0

0 0

SE 0

0 0

0 0

0 0

SSE 0

0 0

0 0

0 0

s 0

0 0

2 1

0 3

SSW 0

0 0

0 0

0 0

SW 0

0 0

0 0

0 0

WSW 0

0 0

1 0

0 1

w 0

0 0

1 0

0 1

WNW 0

0 0

0 1

0 1

NW 0

0 0

0 0

0 0

NNW 0

0 2

0 0

0 2

Variable 0

0 0

0 0

0 0

Total 0

1 7

4 2

0 14 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 37 of90

Byron Generating Station Period of Record: January -

March 2021 Stability Class - Neutral 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

4 13 42 27 0

0 86 NNE 5

11 15 13 3

0 47 NE 2

8 14 12 9

4 49 ENE 3

11 8

12 0

0 34 E

6 19 19 10 0

0 54 ESE 0

9 11 3

0 0

23 SE 1

9 28 7

1 0

46 SSE 3

10 17 23 0

0 53 s

3 3

24 14 6

2 52 SSW 1

15 18 9

0 0

43 SW 2

20 14 7

0 0

43 WSW 3

21 14 15 10 0

63 w

5 47 37 34 6

0 129 WNW 9

24 27 24 7

0 91 NW 5

35 44 22 9

0 115 NNW 5

38 84 18 0

0 145 Variable 0

0 0

0 0

0 0

Total 57 293 416 250 51 6

1073 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 38 of90

Byron Generating Station Period of Record: January -

March 2021 Stability Class - Slightly Stable

- 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

4 16 12 0

0 0

32 NNE 4

13 15 2

1 0

35 NE 1

6 6

0 0

0 13 ENE 1

12 3

4 0

0 20 E

7 8

6 1

0 0

22 ESE 2

16 25 18 8

0 69 SE 1

13 28 10 0

0 52 SSE 2

8 23 22 0

0 55 s

0 11 15 20 5

1 52 SSW 0

9 11 10 2

0 32 SW 1

26 8

8 0

0 43 WSW 3

13 4

14 0

0 34 w

15 49 42 10 0

0 116 WNW 3

30 23 9

1 0

66 NW 9

24 16 4

0 0

53 NNW 4

24 12 0

0 0

40 Variable 0

0 0

0 0

0 0

Total 57 278 249 132 17 1

734 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 39 of90

Byron Generating Station Period of Record: January -

March 2021 Stability Class - Moderately Stable 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

1 2

0 0

0 0

3 NNE 1

1 0

0 0

0 2

NE 0

1 0

0 0

0 1

ENE 1

0 1

0 0

0 2

E 1

2 0

0 0

0 3

ESE 0

9 18 0

0 0

27 SE 3

13 18 1

0 0

35 SSE 0

6 14 2

0 0

22 s

3 6

4 5

0 0

18 SSW 3

0 0

0 0

0 3

SW 5

1 0

0 0

0 6

WSW 4

0 0

0 0

0 4

w 10 11 0

0 0

0 21 WNW 14 4

0 0

0 0

18 NW 11 12 0

0 0

0 23 NNW 3

16 0

0 0

0 19 Variable 0

0 0

0 0

0 0

Total 60 84 55 8

0 0

207 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 40 of90

Byron Generating Station Period of Record: January - March 2021 Stability Class -

Extremely Stable 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

3 0

0 0

0 0

3 NNE 0

0 0

0 0

0 0

NE 0

0 0

0 0

0 0

ENE 1

0 0

0 0

0 1

E 2

1 1

0 0

0 4

ESE 2

3 7

0 0

0 12 SE 4

10 2

0 0

0 16 SSE 0

13 6

0 0

0 19 s

4 3

1 0

0 0

8 SSW 3

0 0

0 0

0 3

SW 1

0 0

0 0

0 1

WSW 7

0 0

0 0

0 7

w 8

0 0

0 0

0 8

WNW 13 0

0 0

0 0

13 NW 13 4

0 0

0 0

17 NNW 2

0 0

0 0

0 2

Variable 0

0 0

0 0

0 0

Total 63 34 17 0

0 0

114 Hours of calm in this stability class:

1 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 41 of90

Byron Generating Station Period of Record: January -

March 2021 Stability Class - Extremely Unstable

- 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

1 5

0 0

6 NNE 0

0 1

0 0

0 1

NE 0

0 0

0 0

0 0

ENE 0

0 0

0 0

0 0

E 0

0 0

0 0

0 0

ESE 0

0 0

0 0

0 0

SE 0

0 0

0 0

0 0

SSE 0

0 0

0 0

0 0

s 0

0 0

0 0

0 0

SSW 0

0 0

0 0

0 0

SW 0

0 0

0 0

0 0

WSW 0

0 0

0 0

0 0

w 0

0 0

0 0

0 0

WNW 0

0 0

0 0

0 0

NW 0

0 0

0 0

0 0

NNW 0

0 0

2 0

0 2

Variable 0

0 0

0 0

0 0

Total 0

0 2

7 0

0 9

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 42 of90

Byron Generating Station Period of Record: January -

March 2021 Stability Class - Moderately Unstable - 250Ft-30Ft Delta-T (Fl Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 2

0 0

2 NNE 0

0 1

0 0

0 1

NE 0

0 0

0 0

0 0

ENE 0

0 0

0 0

0 0

E 0

0 0

0 0

0 0

ESE 0

0 0

0 0

0 0

SE 0

0 0

0 0

0 0

SSE 0

0 0

0 0

0 0

s 0

0 0

0 0

0 0

SSW 0

0 0

0 0

0 0

SW 0

0 0

0 0

0 0

WSW 0

0 0

1 0

0 1

w 0

0 0

0 0

0 0

WNW 0

0 0

0 1

0 1

NW 0

0 0

0 0

0 0

NNW 0

0 0

0 0

0 0

Variable 0

0 0

0 0

0 0

Total 0

0 1

3 1

0 5

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 43 of 90

Byron Generating Station Period of Record: January -

March 2021 Stability Class - Slightly Unstable

- 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed ( in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

4 3

0 0

7 NNE 0

0 1

0 0

0 1

NE 0

0 0

0 0

0 0

ENE 0

0 0

0 0

0 0

E 0

0 0

0 0

0 0

ESE 0

0 0

0 0

0 0

SE 0

0 0

0 0

0 0

SSE 0

0 0

0 0

0 0

s 0

0 0

0 2

1 3

SSW 0

0 0

0 0

0 0

SW 0

0 0

0 0

0 0

WSW 0

0 0

1 0

0 1

w 0

0 0

0 1

0 1

WNW 0

0 0

0 1

0 1

NW 0

0 0

0 0

0 0

NNW 0

0 0

0 0

0 0

Variable 0

0 0

0 0

0 0

Total 0

0 5

4 4

1 14 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class :

0 Hours of missing stability measurements in all stability classes:

3 Page 44 of90

Byron Generating Station Period of Record: January -

March 2021 Stability Class - Neutral 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

1 14 40 57 18 0

130 NNE 1

8 12 11 13 5

50 NE 2

4 12 7

13 15 53 ENE 2

9 4

9 10 1

35 E

1 10 22 10 4

6 53 ESE 0

1 5

5 2

2 15 SE 2

0 6

15 2

2 27 SSE 0

5 10 25 9

3 52 s

0 2

9 13 19 10 53 SSW 1

4 4

19 4

0 32 SW 0

6 13 12 6

1 38 WSW 0

6 8

12 14 9

49 w

2 28 39 27 25 7

128 WNW 3

16 22 9

26 6

82 NW 3

18 19 30 12 6

88 NNW 0

16 41 53 1

0 111 Variable 0

0 0

0 0

0 0

Total 18 147 266 314 178 73 996 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

77 Hours of missing stability measurements in all stability classes:

3 Page 45 of90

Byron Generating Station Period of Record: January -

March 2021 Stability Class - Slightly Stable 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

2 3

11 11 1

0 28 NNE 0

5 7

13 8

1 34 NE 0

2 9

7 3

1 22 ENE 2

3 7

2 2

2 18 E

0 2

9 1

2 0

14 ESE 0

2 3

12 11 13 41 SE 2

2 7

16 15 6

48 SSE 1

4 11 15 22 7

60 s

0 1

2 10 20 21 54 SSW 1

0 8

10 16 7

42 SW 0

1 7

23 13 3

47 WSW 1

1 6

15 13 0

36 w

1 2

20 43 13 0

79 WNW 0

7 20 30 8

1 66 NW 0

9 13 24 3

0 49 NNW 1

2 6

21 0

0 30 Variable 0

0 0

0 0

0 0

Total 11 46 146 253 150 62 668 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

66 Hours of missing stability measurements in all stability classes:

3 Page 46 of90

Byron Generating Station Period of Record: January -

March 2021 Stability Class - Moderately Stable

- 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 1

8 7

0 0

16 NNE 0

1 2

6 0

0 9

NE 1

0 0

0 0

0 1

ENE 1

0 1

0 0

0 2

E 0

1 4

1 0

0 6

ESE 0

0 1

2 0

0 3

SE 2

0 3

6 13 2

26 SSE 0

0 6

10 12 5

33 s

0 1

2 9

9 7

28 SSW 0

1 1

3 1

3 9

SW 0

1 0

0 0

0 1

WSW 2

2 1

0 0

0 5

w 1

0 4

4 0

0 9

WNW 0

1 10 7

0 0

18 NW 0

2 12 8

0 0

22 NNW 0

1 6

12 0

0 19 Variable 0

0 0

0 0

0 0

Total 7

12 61 75 35 17 207 Hours of calm in this stability class :

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 47 of 90

Byron Generating Station Period of Record: January -

March 2021 Stability Class - Extremely Stable

- 250Ft-30Ft Delta-T (Fl Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 2

4 5

0 0

11 NNE 0

0 0

0 0

0 0

NE 1

4 0

0 0

0 5

ENE 2

5 0

0 0

0 7

E 0

2 0

0 0

0 2

ESE 0

1 3

0 0

0 4

SE 0

1 2

3 7

0 13 SSE 0

2 5

5 3

2 17 s

0 0

1 8

4 0

13 SSW 0

0 1

7 1

0 9

SW 1

0 0

0 0

0 1

WSW 0

0 1

0 0

0 1

w 0

1 3

1 0

0 5

WNW 0

4 2

2 0

0 8

NW 1

2 4

4 0

0 11 NNW 1

2 4

1 0

0 8

Variable 0

0 0

0 0

0 0

Total 6

26 30 36 15 2

115 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 48 of90

Byron Generating Station Period of Record: April - June 2021 Stability Class - Extremely Unstable

- 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 1

0 0

0 0

1 NNE 0

0 0

0 0

0 0

NE 0

0 0

0 0

0 0

ENE 0

0 0

0 0

0 0

E 0

0 0

0 0

0 0

ESE 0

0 0

0 0

0 0

SE 1

0 0

0 0

0 1

SSE 1

2 1

0 0

0 4

s 0

0 1

0 0

0 1

SSW 0

0 0

0 0

0 0

SW 0

0 0

1 0

0 1

WSW 0

0 0

3 0

0 3

w 0

1 0

0 0

0 1

WNW 1

2 0

0 0

0 3

NW 0

0 0

0 0

0 0

NNW 0

0 1

0 0

0 1

Variable 0

0 0

0 0

0 0

Total 3

6 3

4 0

0 16 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 49 of90

Byron Generating Station Period of Record: April - June 2021 Stability Class - Moderately Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

1 0

0 0

1 NNE 0

0 0

0 0

0 0

NE 0

1 0

0 0

0 1

ENE 0

0 0

0 0

0 0

E 0

0 0

0 0

0 0

ESE 0

0 0

0 0

0 0

SE 0

0 1

0 0

0 1

SSE 0

0 0

0 0

0 0

s 0

0 3

4 0

0 7

SSW 0

0 3

1 1

0 5

SW 0

0 7

3 0

0 10 WSW 0

0 4

2 0

0 6

w 0

0 6

1 0

0 7

WNW 0

0 1

0 0

0 1

NW 0

1 1

0 0

0 2

NNW 0

0 0

0 0

0 0

Variable 0

0 0

0 0

0 0

Total 0

2 27 11 1

0 41 Hours of calm in this stability class :

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 50 of90

Byron Generating Station Period of Record: April - June 2021 Stability Class - Slightly Unstable

- 250Ft-30Ft Delta-T (Fl Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 1

1 3

0 0

5 NNE 0

0 2

0 0

0 2

NE 0

0 2

0 0

0 2

ENE 0

3 1

0 0

0 4

E 0

1 0

0 0

0 1

ESE 0

0 0

0 0

0 0

SE 0

0 0

0 0

0 0

SSE 0

0 0

2 3

1 6

s 0

2 1

6 0

0 9

SSW 0

2 6

1 0

0 9

SW 0

0 6

4 1

0 11 WSW 0

1 3

3 0

0 7

w 0

1 4

5 0

0 10 WNW 0

0 2

1 0

0 3

NW 1

0 2

1 0

0 4

NNW 0

2 6

0 0

0 8

Variable 0

0 0

0 0

0 0

Total 1

13 36 26 4

1 81 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 51 of90

Byron Generating Station Period of Record: April -

June 2021 Stability Class - Neutral

- 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

2 14 34 13 0

0 63 NNE 3

23 29 14 0

0 69 NE 2

7 5

18 0

0 32 ENE 0

20 10 7

0 0

37 E

3 14 12 2

0 0

31 ESE 5

15 8

7 1

0 36 SE 0

12 15 14 0

0 41 SSE 1

11 30 7

0 0

49 s

6 30 42 38 2

0 118 SSW 1

38 67 23 1

0 130 SW 4

25 43 13 2

0 87 WSW 2

14 31 6

1 1

55 w

4 20 22 20 3

0 69 WNW 1

20 19 26 0

0 66 NW 5

26 45 33 0

0 109 NNW 3

24 43 7

0 0

77 Variable 0

0 0

0 0

0 0

Total 42 313 455 248 10 1

1069 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 52 of90

Byron Generating Station Period of Record: April -

June 2021 Stability Class - Slightly Stable 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

4 11 4

0 0

0 19 NNE 3

10 3

0 0

0 16 NE 1

6 1

0 0

0 8

ENE 4

6 8

2 0

0 20 E

6 26 4

0 0

0 36 ESE 7

17 16 5

0 0

45 SE 9

13 14 2

0 0

38 SSE 8

17 59 3

0 0

87 s

4 42 29 11 0

0 86 SSW 5

30 27 9

0 0

71 SW 5

21 20 8

0 0

54 WSW 4

13 16 0

1 0

34 w

15 15 11 1

0 0

42 WNW 6

15 7

0 0

0 28 NW 0

20 6

4 0

0 30 NNW 1

16 11 0

0 0

28 Variable 0

0 0

0 0

0 0

Total 82 278 236 45 1

0 642 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 53 of90

Byron Generating Station Period of Record: April - June 2021 Stability Class - Moderately Stable 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

4 1

0 0

0 0

5 NNE 1

0 0

0 0

0 1

NE 2

1 0

0 0

0 3

ENE 3

4 0

0 0

0 7

E 6

14 3

0 0

0 23 ESE 6

22 2

0 0

0 30 SE 1

17 3

0 0

0 21 SSE 7

28 16 0

0 0

51 s

5 10 12 0

0 0

27 SSW 9

6 1

0 0

0 16 SW 14 3

0 0

0 0

17 WSW 9

1 0

0 0

0 10 w

13 3

0 0

0 0

16 WNW 9

2 0

0 0

0 11 NW 5

4 0

0 0

0 9

NNW 3

9 0

0 0

0 12 Variable 0

0 0

0 0

0 0

Total 97 125 37 0

0 0

259 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 54 of90

Byron Generating Station Period of Record: April - June 2021 Stability Class - Extremely Stable

- 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 0

0 0

0 NNE 0

0 0

0 0

0 0

NE 0

0 0

0 0

0 0

ENE 2

0 0

0 0

0 2

E 0

1 0

0 0

0 1

ESE 4

2 0

0 0

0 6

SE 3

6 0

0 0

0 9

SSE 1

2 0

0 0

0 3

s 6

3 0

0 0

0 9

SSW 4

1 0

0 0

0 5

SW 8

0 0

0 0

0 8

WSW 5

0 0

0 0

0 5

w 6

0 0

0 0

0 6

WNW 6

1 0

0 0

0 7

NW 7

2 0

0 0

0 9

NNW 1

2 0

0 0

0 3

Variable 0

0 0

0 0

0 0

Total 53 20 0

0 0

0 73 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 55 of90

Byron Generating Station Period of Record: April - June 2021 Stability Class - Extremely Unstable

- 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 1

0 0

1 NNE 0

0 1

0 0

0 1

NE 0

0 0

0 0

0 0

ENE 0

0 0

0 0

0 0

E 0

0 0

0 0

0 0

ESE 0

0 0

0 0

0 0

SE 1

0 0

0 0

0 1

SSE 0

1 2

1 0

0 4

s 0

0 0

0 0

0 0

SSW 0

0 0

1 0

0 1

SW 0

0 0

0 1

0 1

WSW 0

0 0

2 1

0 3

w 0

1 0

0 0

0 1

WNW 1

2 0

0 0

0 3

NW 0

0 0

0 0

0 0

NNW 0

0 0

0 0

0 0

Variable 0

0 0

0 0

0 0

Total 2

4 3

5 2

0 16 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 56 of90

Byron Generating Station Period of Record: April -

June 2021 Stability Class - Moderately Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 1

0 0

1 NNE 0

0 0

0 0

0 0

NE 0

0 1

0 0

0 1

ENE 0

0 0

0 0

0 0

E 0

0 0

0 0

0 0

ESE 0

0 0

0 0

0 0

SE 0

0 0

0 1

0 1

SSE 0

0 0

0 0

0 0

s 0

0 0

3 2

0 5

SSW 0

0 1

4 0

1 6

SW 0

0 2

5 3

1 11 WSW 0

0 1

3 2

0 6

w 0

0 3

4 0

0 7

WNW 0

0 0

1 0

0 1

NW 0

1 1

0 0

0 2

NNW 0

0 0

0 0

0 0

Variable 0

0 0

0 0

0 0

Total 0

1 9

2 8

2 4

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 57 of90

Byron Generating Station Period of Record: April - June 2021 Stability Class - Slightly Unstable

- 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 1

1 6

0 0

8 NNE 0

0 0

1 0

0 1

NE 0

0 3

2 0

0 5

ENE 0

1 1

0 0

0 2

E 0

2 0

0 0

0 2

ESE 0

0 0

0 0

0 0

SE 0

0 0

0 0

0 0

SSE 0

0 0

1 1

4 6

s 0

0 2

4 2

0 8

SSW 0

1 4

2 1

0 8

SW 0

0 3

5 4

1 13 WSW 0

0 3

1 3

0 7

w 0

0 2

5 3

0 10 WNW 0

0 2

2 0

0 4

NW 1

0 1

1 0

0 3

NNW 0

1 0

3 0

0 4

Variable 0

0 0

0 0

0 0

Total 1

6 22 33 14 5

81 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 58 of90

Byron Generating Station Period of Record: April - June 2021 Stability Class - Neutral 250Ft-30Ft Delta-T (Fl Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

4 12 28 25 3

0 72 NNE 1

9 25 9

5 0

49 NE 2

10 9

9 17 9

56 ENE 0

8 8

6 5

2 29 E

2 12 5

12 3

1 35 ESE 3

12 3

9 6

1 34 SE 1

8 7

9 15 0

40 SSE 2

10 8

27 4

1 52 s

0 12 22 49 20 7

110 SSW 1

24 47 40 23 3

138 SW 1

8 26 33 13 4

85 WSW 2

4 22 21 4

2 55 w

3 17 1B 20 17 1

76 WNW 2

14 15 27 7

0 65 NW 1

13 25 38 17 0

94 NNW 1

15 27 34 2

0 79 Variable 0

0 0

0 0

0 0

Total 26 188 295 368 161 31 1069 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 59 of90

Byron Generating Station Period of Record: April -

June 2021 Stability Class - Slightly Stable 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

1 2

1 0 7

0 0

20 NNE 1

1 8

14 0

0 24 NE 2

2 1

2 0

0 7

ENE 3

3 3

4 7

0 20 E

0 4

10 6

1 0

21 ESE 2

5 14 19 8

0 48 SE 0

4 5

12 6

1 28 SSE 0

5 7

26 12 1

51 s

1 5

15 44 27 3

95 SSW 0

13 24 50 17 2

106 SW 1

2 6

24 18 6

57 WSW 2

6 9

18 3

1 39 w

0 6

10 19 2

0 37 WNW 1

4 14 4

0 0

23 NW 0

2 25 8

4 0

39 NNW 0

3 7

15 1

0 26 Variable 0

0 0

0 0

0 0

Total 14 67 168 272 106 14 641 Hours of calm in this stability class:

1 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 60 of90

Byron Generating Station Period of Record: April -

June 2021 Stability Class - Moderately Stable

- 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 2

2 4

0 0

8 NNE 0

1 3

0 0

0 4

NE 0

0 3

0 0

0 3

ENE 0

5 0

1 0

0 6

E 0

3 5

4 0

0 12 ESE 1

3 9

10 2

0 25 SE 0

3 7

9 1

0 20 SSE 0

3 13 10 8

0 34 s

1 4

11 16 19 1

52 SSW 1

0 6

9 5

0 21 SW 0

2 6

5 1

0 14 WSW 0

1 7

6 0

0 14 w

0 3

8 6

0 0

17 WNW 0

2 7

0 0

0 9

NW 0

2 7

2 0

0 11 NNW 1

2 5

1 0

0 9

Variable 0

0 0

0 0

0 0

Total 4

36 99 83 36 1

259 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 61 of90

Byron Generating Station Period of Record: April - June 2021 Stability Class - Extremely Stable 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 3

0 0

3 NNE 0

0 1

0 0

0 1

NE 0

0 0

0 0

0 0

ENE 1

0 0

0 0

0 1

E 0

3 0

0 0

0 3

ESE 0

2 0

0 0

0 2

SE 0

1 1

0 0

0 2

SSE 0

6 1

0 3

0 10 s

0 2

1 1

1 0

5 SSW 0

5 0

0 0

0 5

SW 0

3 7

0 1

0 11 WSW 0

2 6

5 0

0 13 w

1 3

3 1

0 0

8 WNW 1

1 3

0 0

0 5

NW 0

0 2

0 0

0 2

NNW 0

0 0

2 0

0 2

Variable 0

0 0

0 0

0 0

Total 3

28 25 12 5

0 73 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 Page 62 of90

Byron Generating Station Period of Record: July -

September 2021 Stability Class -

Extremely Unstable 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

1 0

4 0

0 0

5 NNE 0

1 0

0 0

0 1

NE 0

0 0

0 0

0 0

ENE 0

0 0

0 0

0 0

E 0

0 0

0 0

0 0

ESE 0

0 0

0 0

0 0

SE 0

0 0

0 0

0 0

SSE 0

0 2

0 0

0 2

s 0

0 0

0 0

0 0

SSW 0

1 0

0 0

0 1

SW 0

0 1

0 0

0 1

WSW 0

0 2

0 0

0 2

w 0

0 0

2 0

0 2

WNW 0

0 1

1 0

0 2

NW 0

0 0

0 0

0 0

NNW 0

0 0

0 0

0 0

Variable 0

0 0

0 0

0 0

Total 1

2 0

3 0

0 16 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

8 Page 63 of90

Byron Generating Station Period of Record: July -

September 2021 Stability Class - Moderately Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

1 0

0 0

1 NNE 0

0 0

0 0

0 0

NE 0

0 0

0 0

0 0

ENE 0

0 0

0 0

0 0

E 0

0 0

0 0

0 0

ESE 0

0 0

0 0

0 0

SE 0

0 0

0 0

0 0

SSE 0

0 0

0 0

0 0

s 0

0 4

0 0

0 4

SSW 0

0 3

0 0

0 3

SW 0

0 3

0 0

0 3

WSW 0

0 3

6 0

0 9

w 0

3 4

1 0

0 8

WNW 0

1 0

2 0

0 3

NW 0

1 0

2 0

0 3

NNW 1

0 0

0 0

0 1

Variable 0

0 0

0 0

0 0

Total 1

5 1 8 11 0

0 35 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

8 Page 64 of90

Byron Generating Station Period of Record: July -

September 2021 Stability Class - Slightly Unstable

- 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

1 2

1 1

0 0

5 NNE 0

0 0

0 0

0 0

NE 0

0 1

0 0

0 1

ENE 0

3 0

0 0

0 3

E 0

1 0

0 0

0 1

ESE 0

1 3

0 0

0 4

SE 0

0 2

0 0

0 2

SSE 0

0 3

0 0

0 3

s 0

1 2

3 0

0 6

SSW 0

3 4

3 0

0 10 SW 0

0 7

2 0

0 9

WSW 0

0 8

1 0

0 9

w 0

2 3

1 0

0 6

WNW 0

1 3

3 0

0 7

NW 0

2 2

1 0

0 5

NNW 0

3 0

1 0

0 4

Variable 0

0 0

0 0

0 0

Total 1

19 39 16 0

0 75 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

8 Page 65 of90

Byron Generating Station Period of Record: July -

September 2021 Stability Class -

Neutral 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

3 22 22 8

0 0

55 NNE 1

12 20 0

0 0

33 NE 2

13 28 3

0 0

46 ENE 5

43 6

0 0

0 54 E

1 35 2

0 0

0 38 ESE 3

23 9

0 0

0 35 SE 3

33 7

0 0

0 43 SSE 2

21 26 1

0 0

so s

1 18 35 7

0 0

61 SSW 2

22 52 12 1

0 89 SW 1

24 42 6

0 0

73 WSW 4

18 19 5

0 0

46 w

9 30 32 8

0 0

79 WNW 6

26 26 1

0 0

59 NW 3

20 22 8

0 0

53 NNW 4

25 20 2

0 0

51 Variable 0

0 0

0 0

0 0

Total 50 385 368 61 1

0 865 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

8 Page 66 of90

Byron Generating Station Period of Record: July -

September 2021 Stability Class - Slightly Stable 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed ( in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

8 21 7

0 0

0 36 NNE 8

18 0

0 0

0 26 NE 3

18 19 0

0 0

40 ENE 8

19 8

0 0

0 35 E

9 38 0

0 0

0 47 ESE 2

17 2

0 1

0 22 SE 4

18 4

0 0

0 26 SSE 3

42 26 1

0 0

72 s

6 50 24 3

0 0

83 SSW 6

34 28 3

0 0

71 SW 9

34 15 3

0 0

61 WSW 6

14 2

0 0

0 22 w

5 16 4

0 0

0 25 WNW 10 16 3

1 0

0 30 NW 10 30 6

0 1

0 47 NNW 6

28 6

0 0

0 40 Variable 0

0 0

0 0

0 0

Total 103 413 154 11 2

0 683 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

8 Page 67 of90

Byron Generating Station Period of Record: July -

September 2021 Stability Class - Moderately Stable 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

2 4

0 0

0 0

6 NNE 4

3 0

0 0

0 7

NE 0

0 0

0 0

0 0

ENE 4

5 0

0 0

0 9

E 8

31 0

0 0

0 39 ESE 5

29 4

0 0

0 38 SE 6

26 2

0 0

0 34 SSE 8

31 6

0 0

0 45 s

6 23 4

0 0

0 33 SSW 7

6 0

0 0

0 13 SW 4

1 0

0 0

0 5

WSW 10 6

0 0

0 0

16 w

19 11 0

0 0

0 30 WNW 17 4

0 0

0 0

21 NW 18 11 0

0 0

0 29 NNW 4

10 0

0 0

0 14 Variable 0

0 0

0 0

0 0

Total 122 201 16 0

0 0

33 9 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

8 Page 68 of90

Byron Generating Station Period of Record: July -

September 2021 Stability Class - Extremely Stable 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

2 0

0 0

0 0

2 NNE 0

0 0

0 0

0 0

NE 3

0 0

0 0

0 3

ENE 2

0 0

0 0

0 2

E 11 13 0

0 0

0 24 ESE 2

6 3

0 0

0 11 SE 4

11 0

0 0

0 15 SSE 4

8 3

0 0

0 15 s

11 7

1 0

0 0

19 SSW 9

4 0

0 0

0 13 SW 7

0 0

0 0

0 7

WSW 10 0

0 0

0 0

10 w

14 0

0 0

0 0

14 WNW 21 0

0 0

0 0

21 NW 18 0

0 0

0 0

18 NNW 4

2 0

0 0

0 6

Variable 0

0 0

0 0

0 0

Total 122 51 7

0 0

0 180 Hours of calm in this stability class:

7 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

8 Page 69 of90

Byron Generating Station Period of Record: July - September 2021 Stability Class - Extremely Unstable

- 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 2

0 2

0 0

4 NNE 0

0 0

2 0

0 2

NE 0

0 0

0 0

0 0

ENE 0

0 0

0 0

0 0

E 0

0 0

0 0

0 0

ESE 0

0 0

0 0

0 0

SE 0

0 0

0 0

0 0

SSE 0

0 0

1 0

0 1

s 0

0 0

1 0

0 1

SSW 0

1 0

0 0

0 1

SW 0

0 0

1 0

0 1

WSW 0

0 0

2 0

0 2

w 0

2 0

0 0

0 2

WNW 0

1 0

1 0

0 2

NW 0

0 0

0 0

0 0

NNW 0

0 0

0 0

0 0

Variable 0

0 0

0 0

0 0

Total 0

6 0

10 0

0 16 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

8 Page 70 of90

Byron Generating Station Period of Record: July - September 2021 Stability Class - Moderately Unstable

- 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

1 0

0 0

1 NNE 0

0 0

0 0

0 0

NE 0

0 0

0 0

0 0

ENE 0

0 0

0 0

0 0

E 0

0 0

0 0

0 0

ESE 0

0 0

0 0

0 0

SE 0

0 0

0 0

0 0

SSE 0

0 0

0 0

0 0

s 0

0 0

3 0

0 3

SSW 0

0 3

0 0

0 3

SW 0

0 1

3 0

0 4

WSW 0

0 1

5 3

0 9

w 2

1 4

1 0

0 8

WNW 0

0 0

1 1

0 2

NW 0

1 0

1 1

0 3

NNW 0

2 0

0 0

0 2

Variable 0

0 0

0 0

0 0

Total 2

4 10 14 5

0 35 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

8 Page 71 of90

Byron Generating Station Period of Record: July -

September 2021 Stability Class - Slightly Unstable 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 1

0 1

1 0

3 NNE 0

0 0

0 0

0 0

NE 0

0 0

0 0

0 0

ENE 0

2 1

0 0

0 3

E 0

1 1

0 0

0 2

ESE 0

0 3

1 0

0 4

SE 0

0 2

0 0

0 2

SSE 0

0 0

2 0

0 2

s 0

0 3

1 3

0 7

SSW 0

0 4

2 2

0 8

SW 0

0 3

5 3

0 11 WSW 0

0 4

5 1

0 10 w

0 2

2 2

0 0

6 WNW 1

0 2

2 2

0 7

NW 0

0 3

1 1

0 5

NNW 0

2 3

0 0

0 5

Variable 0

0 0

0 0

0 0

Total 1

8 31 22 13 0

75 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

8 Page 72 of90

Byron Generating Station Period of Record: July -

September 2021 Stability Class - Neutral 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

2 8

19 16 3

0 48 NNE 1

9 20 8

0 0

38 NE 1

6 13 21 2

0 43 ENE 2

12 27 8

2 0

51 E

1 18 23 2

0 0

44 ESE 1

16 16 0

0 0

33 SE 0

19 24 1

0 0

44 SSE 3

9 15 15 0

0 42 s

2 8

21 26 6

0 63 SSW 2

7 22 42 14 1

88 SW 3

11 22 38 8

2 84 WSW 4

13 11 15 3

0 46 w

5 15 37 13 5

0 75 WNW 8

10 27 7

1 0

53 NW 5

21 11 10 6

0 53 NNW 1

18 18 9

0 0

46 Variable 0

0 0

0 0

0 0

Total 41 200 326 231 50 3

85 1 Hours of calm in this stability class:

14 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

8 Page 73 of90

Byron Generating Station Period of Record: July -

September 2021 Stability Class - Slightly Stable

- 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed ( in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

1 8

17 18 0

0 44 NNE 2

4 11 10 0

0 27 NE 4

7 13 14 0

0 38 ENE 0

7 20 24 1

0 52 E

0 10 17 11 1

0 39 ESE 0

3 7

9 1

0 20 SE 5

4 7

2 1

0 19 SSE 7

10 8

14 4

0 43 s

0 4

15 53 12 0

84 SSW 1

1 17 48 14 0

81 SW 2

5 9

52 7

3 78 WSW 2

4 12 4

0 0

22 w

0 5

14 6

1 0

26 WNW 3

4 12 1

1 0

21 NW 0

11 16 12 0

1 40 NNW 2

11 15 12 0

0 40 Variable 0

0 0

0 0

0 0

Total 29 98 21 0 290 43 4

674 Hours of calm in this stability class:

9 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

8 Page 74 of90

Byron Generating Station Period of Record: July -

September 2021 Stability Class - Moderately Stable 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

2 1

4 5

0 0

12 NNE 0

0 6

5 0

0 11 NE 0

3 4

1 0

0 8

ENE 0

0 2

2 0

0 4

E 0

6 6

7 3

0 22 ESE 0

1 11 15 9

0 36 SE 1

3 7

15 7

0 33 SSE 2

2 5

18 7

0 34 s

1 0

4 13 11 0

29 SSW 1

0 9

18 0

0 28 SW 1

2 7

8 0

0 18 WSW 1

1 4

2 0

0 8

w 1

2 1

4 0

0 8

WNW 8

2 7

10 0

0 27 NW 1

8 14 6

0 0

29 NNW 2

6 10 6

0 0

24 Variable 0

0 0

0 0

0 0

Total 21 37 101 1 35 37 0

331 Hours of calm in this stability class:

8 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

8 Page 75 of 90

Byron Generating Station Period of Record: July -

September 2021 Stability Class -

Extremely Stable

- 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 1

1 0

0 0

2 NNE 0

2 0

0 0

0 2

NE 0

3 4

0 0

0 7

ENE 3

3 2

0 0

0 8

E 1

2 1

0 0

0 4

ESE 0

0 4

9 2

0 15 SE 1

0 7

20 2

0 30 SSE 1

1 7

3 5

0 17 s

0 4

3 2

3 0

12 SSW 3

1 1

4 0

0 9

SW 0

1 8

5 0

0 14 WSW 0

2 4

4 0

0 10 w

2 4

0 4

0 0

10 WNW 0

2 2

1 0

0 5

NW 0

2 12 1

0 0

15 NNW 1

5 14 3

0 0

23 Variable 0

0 0

0 0

0 0

Total 12 33 70 56 12 0

183 Hours of calm in this stability class:

4 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

8 Page 76 of 90

Byron Generating Station Period of Record: October -

December2021 Stability Class - Extremely Unstable 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 0

0 0

0 NNE 0

0 0

0 0

0 0

NE 0

0 0

0 0

0 0

ENE 0

0 0

0 0

0 0

E 0

0 0

0 0

0 0

ESE 0

0 0

0 0

0 0

SE 0

0 0

0 0

0 0

SSE 0

0 0

0 0

0 0

s 0

0 5

2 0

0 7

SSW 0

0 0

0 0

0 0

SW 0

1 0

0 0

0 1

WSW 0

0 1

0 0

0 1

w 0

0 0

0 0

0 0

WNW 0

0 0

0 0

0 0

NW 0

0 0

0 0

0 0

NNW 0

0 0

0 0

0 0

Variable 0

0 0

0 0

0 0

Total 0

1 6

2 0

0 9

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 77 of90

Byron Generating Station Period of Record: October - December2021 Stability Class - Moderately Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 1

0 0

1 NNE 0

0 0

0 0

0 0

NE 0

0 0

0 0

0 0

ENE 0

0 0

0 0

0 0

E 0

0 0

0 0

0 0

ESE 0

0 0

0 0

0 0

SE 0

0 0

0 0

0 0

SSE 0

0 0

0 0

0 0

s 0

1 0

1 0

0 2

SSW 0

0 0

0 0

0 0

SW 0

1 0

0 0

0 1

WSW 0

0 0

0 0

0 0

w 0

0 1

0 0

0 1

WNW 0

0 2

0 0

0 2

NW 0

0 0

0 0

0 0

NNW 0

0 0

0 0

0 0

Variable 0

0 0

0 0

0 0

Total 0

2 3

2 0

0 7

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 78 of90

Byron Generating Station Period of Record: October -

December2021 Stability Class - Slightly Unstable

- 250Ft-30Ft Delta-T (Fl Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

1 1

0 0

2 NNE 0

1 0

0 0

0 1

NE 0

0 0

0 0

0 0

ENE 0

0 0

0 0

0 0

E 1

0 0

0 0

0 1

ESE 0

1 0

0 0

0 1

SE 0

0 0

0 0

0 0

SSE 1

0 1

0 0

0 2

s 0

0 1

0 0

0 1

SSW 0

0 1

0 0

0 1

SW 1

2 0

0 0

0 3

WSW 0

0 0

0 0

0 0

w 0

0 2

0 0

0 2

WNW 0

0 4

1 0

0 5

NW 0

0 0

0 0

0 0

NNW 0

0 0

0 0

0 0

Variable 0

0 0

0 0

0 0

Total 3

4 10 2

0 0

19 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 79 of90

Byron Generating Station Period of Record: October -

December2021 Stability Class - Neutral 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

2 8

38 23 0

0 71 NNE 1

7 13 6

1 0

28 NE 1

10 12 4

0 0

27 ENE 3

28 28 9

1 0

69 E

0 21 22 6

0 0

49 ESE 1

9 8

11 0

0 29 SE 2

11 24 9

0 0

46 SSE 1

6 38 8

3 0

56 s

1 19 37 24 4

0 85 SSW 2

30 26 7

1 0

66 SW 2

15 18 12 0

0 47 WSW 2

11 17 14 12 3

59 w

1 10 29 19 12 2

73 WNW 4

19 47 44 17 2

133 NW 3

23 25 37 3

1 92 NNW 2

31 31 6

0 0

70 Variable 0

0 0

0 0

0 0

Total 28 258 41 3 239 54 8

1000 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 80 of90

Byron Generating Station Period of Record: October -

December2021 Stability Class - Slightly Stable 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

3 16 11 5

0 0

35 NNE 1

12 4

0 0

0 17 NE 4

8 4

0 0

0 16 ENE 4

23 12 2

1 0

42 E

3 23 11 3

0 0

40 ESE 1

8 15 9

0 0

33 SE 1

8 20 19 0

0 48 SSE 5

31 31 2 9 0

0 96 s

5 15 33 9

0 2

64 SSW 5

15 30 16 0

1 67 SW 8

20 20 6

0 2

56 WSW 12 10 19 6

2 3

52 w

3 46 22 12 0

0 83 WNW 8

37 20 8

4 0

77 NW 6

26 21 1

0 0

54 NNW 7

22 10 0

0 0

39 Variable 0

0 0

0 0

0 0

Total 76 320 283 125 7

8 819 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 81 of90

Byron Generating Station Period of Record: October -

December2021 Stability Class - Moderately Stable 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

2 3

0 0

0 0

5 NNE 1

0 0

0 0

0 1

NE 1

1 0

0 0

0 2

ENE 1

4 0

0 0

0 5

E 5

20 3

0 0

0 28 ESE 7

19 8

0 0

0 34 SE 2

14 6

0 0

0 22 SSE 4

24 6

0 0

0 34 s

6 16 1

0 0

0 23 SSW 2

5 0

0 0

0 7

SW 4

2 0

0 0

0 6

WSW 9

3 0

0 0

0 12 w

11 8

0 0

0 0

19 WNW 11 5

0 0

0 0

16 NW 7

7 0

0 0

0 14 NNW 4

4 0

0 0

0 8

Variable 0

0 0

0 0

0 0

Total 77 35 24 0

0 0

236 Hours of calm in this stability class:

1 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 82 of90

Byron Generating Station Period of Record: October -

December2021 Stability Class - Extremely Stable

- 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 0

0 0

0 NNE 0

0 0

0 0

0 0

NE 0

0 0

0 0

0 0

ENE 1

2 0

0 0

0 3

E 2

1 9 1

0 0

0 22 ESE 1

13 5

0 0

0 19 SE 2

3 2

0 0

0 7

SSE 0

10 0

0 0

0 10 s

5 8

0 0

0 0

13 SSW 3

1 0

0 0

0 4

SW 4

0 0

0 0

0 4

WSW 4

0 0

0 0

0 4

w 7

0 0

0 0

0 7

WNW 6

0 0

0 0

0 6

NW 12 1

0 0

0 0

13 NNW 4

0 0

0 0

0 4

Variable 0

0 0

0 0

0 0

Total 51 57 8

0 0

0 11 6 Hours of calm in this stability class:

1 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 83 of90

Byron Generating Station Period of Record: October - December2021 Stability Class - Extremely Unstable

- 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 0

0 0

0 NNE 0

0 0

0 0

0 0

NE 0

0 0

0 0

0 0

ENE 0

0 0

0 0

0 0

E 0

0 0

0 0

0 0

ESE 0

0 0

0 0

0 0

SE 0

0 0

0 0

0 0

SSE 0

0 0

0 0

0 0

s 0

0 0

2 5

0 7

SSW 0

0 0

0 0

0 0

SW 0

0 1

0 0

0 1

WSW 0

0 0

1 0

0 1

w 0

0 0

0 0

0 0

WNW 0

0 0

0 0

0 0

NW 0

0 0

0 0

0 0

NNW 0

0 0

0 0

0 0

Variable 0

0 0

0 0

0 0

Total 0

0 1

3 5

0 9

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 84 of90

Byron Generating Station Period of Record: October -

December2021 Stability Class -

Moderately Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 1

0 0

1 NNE 0

0 0

0 0

0 0

NE 0

0 0

0 0

0 0

ENE 0

0 0

0 0

0 0

E 0

0 0

0 0

0 0

ESE 0

0 0

0 0

0 0

SE 0

0 0

0 0

0 0

SSE 0

0 0

0 0

0 0

s 0

0 1

0 1

0 2

SSW 0

0 0

0 0

0 0

SW 0

1 0

0 0

0 1

WSW 0

0 0

0 0

0 0

w 0

0 0

2 0

0 2

WNW 0

0 0

1 0

0 1

NW 0

0 0

0 0

0 0

NNW 0

0 0

0 0

0 0

Variable 0

0 0

0 0

0 0

Total 0

1 1

4 1

0 7

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 85 of90

Byron Generating Station Period of Record: October -

December2021 Stability Class - Slightly Unstable 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

1 1

0 0

2 NNE 0

0 1

0 0

0 1

NE 0

0 0

0 0

0 0

ENE 0

0 0

0 0

0 0

E 1

0 0

0 0

0 1

ESE 0

1 0

0 0

0 1

SE 0

0 0

0 0

0 0

SSE 0

1 1

0 0

0 2

s 0

0 0

1 0

0 1

SSW 0

1 0

1 0

0 2

SW 0

0 1

0 0

0 1

WSW 0

1 0

0 0

0 1

w 0

0 0

3 0

0 3

WNW 0

0 1

2 1

0 4

NW 0

0 0

0 0

0 0

NNW 0

0 0

0 0

0 0

Variable 0

0 0

0 0

0 0

Total 1

4 5

8 1

0 19 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 86 of90

Byron Generating Station Period of Record: October -

December2021 Stability Class - Neutral 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 9

7 28 14 0

58 NNE 1

4 14 12 8

4 43 NE 0

3 8

14 1

3 29 ENE 1

5 15 14 5

5 45 E

0 12 30 23 12 0

77 ESE 0

4 4

8 9

1 2 6 SE 1

5 10 17 6

1 40 SSE 1

5 9

26 5

1 47 s

1 7

2 3 39 15 7

92 SSW 1

9 2 8 25 7

3 73 SW 2

9 18 13 11 0

53 WSW 0

5 15 13 12 14 59 w

0 5

10 31 17 15 78 WNW 1

12 15 51 32 18 129 NW 3

13 27 21 24 2

90 NNW 2

11 29 15 4

0 61 Variable 0

0 0

0 0

0 0

Total 14 1 8 262 350 182 7 4 1000 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 87 of90

Byron Generating Station Period of Record: October -

December2021 Stability Class - Slightly Stable

- 250Ft-30Ft Delta-T (Fl Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

1 5

9 13 4

0 32 NNE 1

3 10 16 1

0 31 NE 0

3 11 5

0 0

19 ENE 1

1 13 13 2

2 32 E

0 2

14 18 7

1 42 ESE 0

1 2

8 15 2

28 SE 2

1 2

11 15 9

40 SSE 1

2 4

19 32 7

65 s

0 1

14 35 17 12 79 SSW 2

8 9

35 41 1

96 SW 0

1 6

17 16 4

44 WSW 1

8 12 20 6

4 51 w

1 4

24 36 12 1

78 WNW 0

6 30 45 5

4 90 NW 0

7 29 23 8

0 67 NNW 0

3 15 6

1 0

25 Variable 0

0 0

0 0

0 0

Total 10 56 20 4 320 82 47 819 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 88 of90

Byron Generating Station Period of Record: October -

December2021 Stability Class - Moderately Stable 250Ft-30Ft Delta-T (Fl Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 1

5 6

0 0

12 NNE 0

1 1

2 0

0 4

NE 1

1 1

0 0

0 3

ENE 1

0 1

0 0

0 2

E 0

1 6

5 0

0 12 ESE 0

5 5

7 10 1

28 SE 1

4 7

6 6

0 24 SSE 2

2 9

5 4

0 22 s

1 2

3 17 4

0 27 SSW 0

0 4

18 3

0 25 SW 1

2 2

4 0

0 9

WSW 1

1 8

3 0

0 13 w

1 4

6 6

0 0

17 WNW 1

2 10 8

0 0

21 NW 0

3 2

6 0

0 11 NNW 0

1 5

1 0

0 7

Variable 0

0 0

0 0

0 0

Total 10 30 75 94 27 1

237 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 89 of90

Byron Generating Station Period of Record: October -

December2021 Stability Class -

Extremely Stable

- 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 4

0 2

0 0

6 NNE 3

2 2

0 0

0 7

NE 0

1 0

0 0

0 1

ENE 0

1 0

0 0

0 1

E 0

1 4

1 1

0 7

ESE 0

0 0

8 8

2 18 SE 0

0 3

6 4

0 13 SSE 1

1 3

4 1

0 10 s

0 0

1 4

0 0

5 SSW 0

3 3

3 1

0 10 SW 1

0 2

5 0

0 8

WSW 0

1 8

0 0

0 9

w 0

3 2

0 0

0 5

WNW 1

0 2

0 0

0 3

NW 0

3 0

0 0

0 3

NNW 2

4 4

1 0

0 11 Variable 0

0 0

0 0

0 0

Total 8

24 34 34 15 2

117 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 90 of90