ML23110A084

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Annual Radioactive Effluent Release Report (ARERR)
ML23110A084
Person / Time
Site: Byron  Constellation icon.png
Issue date: 04/27/2023
From: Welt H
Constellation Energy Generation
To:
Office of Nuclear Reactor Regulation, Document Control Desk
References
byron 2023-0020
Download: ML23110A084 (1)
v • d • e


Text

Constellat,on Energy Generation, LLC (CEG)

Byron Station Constellation 4450 N. German Church Road Byron, IL 61010-9794 www.constellationenergy.com April 27, 2023 LTR: BYRON 2023-0020 10 CFR 50.36a File 1D.101 2C.111 United States Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Byron Station, Units 1 and 2 Renewed Facility Operating License Nos. NPF-37 and NPF-66 NRG Docket Nos. STN 50-454 and STN 50-455

Subject:

2022 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 2022 through December 2022.

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

Respectfully,

..-,' ~~

A. ,_~l7.,(.J'

/l {,.

Harris Welt Site Vice President Byron Station HW/AH/JA/hh Enclosures cc: Regional Administrator - NRG Region Ill

BYRON NUCLEAR POWER STATION ANNUAL RADIOLOGICAL EFFLUENT RELEASE REPORT (ARERR) 2022 Page 1 of89

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 of 89

BYRON NUCLEAR POWER STATION UNIT 1/2 DOCKET NUMBER STN-50-454/455 RADIOACTIVE EFFLUENT RELEASE REPORT January 2022 - December 2022 Supplemental Information

1. Regulatory Limits
a. Fission and activation products:

Tech Spec Whole Body = 500 mrem/year Skin = 3000 mrem/year 10CFR50 Gamma = 5 mrad/quarter; 10 mrad/year Beta = 10 mrad/quarter; 20 mrad/year

b. Iodine: (summed with particulate, see below)
c. Particulates with half-lives > 8 days:

Tech Spec Organ = 1500 mrem/year 10CFR50 Organ = 7.5 mrem/quarter; 15 mrem/year

d. Liquid Effluents:

10CFR50 Whole Body = 1.5 mrem/quarter; 3 mrem/year Organ = 5 mrem/quarter; 10 mrem/year

2. Maximum Permissible Concentration
a. Fission and Activation Products: 10CFR20 Appendix B Table 2
b. Iodine: 10CFR20 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 Page 3 of 89

released is calculated from the highest of a monthly circulating water blowdown composite activity or a sum of the effluent input composite activities.

d. All positive results (i.e. higher than the lower limit of detection (LLD)) are reported in units of uCi/cc or uCi/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 = 76
2. Total time period for batch releases= 12,521 minutes
3. Maximum time period for a batch release= 522 minutes
4. Average time period for a batch release= 165 minutes
5. Minimum time period for a batch release = 9 minutes
6. Average Rock River stream flow during periods of release of effluent into a flowing stream =200 m3/sec, based on information from the U.S. Geological Survey Byron Gauging Station.
b. Gaseous:
1. Number of batch releases= 360
2. Total time period for batch releases= 48,648 minutes
3. Maximum time period for a batch release = 667 4 minutes
4. Average time period for batch releases = 178 minutes
5. Minimum time period for a batch release = 25 minutes
6. Abnormal Releases:
a. Liquid - None
b. Gaseous - None
7. There was no revisions to the Offsite Dose Calculation Manual (ODCM) in 2022.
8. Errata Data In the 2021 ARERR the miscellaneous information section should have included the following: "On February 12, 2021, the Circulating Water Slowdown compositor sample line froze and no sample was collected for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Compensatory grab sampling was initiated once the condition was identified by sampling at the alternate sample point on the 0PR1 OJ radiation monitor at a frequency of once per eight (8) hours until the compositor sample line was thawed and continuous flow restored on the same day."

Page 4 of89

9. 2022 Radiological Groundwater Protection Program (RGPP) Results Summary:

In 2022, 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 2022, 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 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 2022 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 4.97E-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 10CFRS0 Appendix I, 10CFR20 and 40CFR190.

There were no additional operational controls implemented in 2022 that affected radiological effluents.

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

Page 5 of 89

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.

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 10 mrad for beta radiation during any calendar quarter and 10 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 10CFR20 limit on Total Effective Dose Equivalent to individual members of the public is 100 mrem.
  • 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 METEOROLO GY 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 measurement s on the meteorological tower was 99.8% during 2022.

Page 6 of 89

EFFLUENT AND WASTE DISPOSAL REPORT TABLE lA GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES Unit 1 REPORT FOR 2022 Units QTR 1 QTR 2 QTR3 QTR4 YEAR Fission & Activation Gases

1. Total Release Ci l.llE-01 l.84E-01 1.02E-01 8.24E-02 4.79E-01
2. Avg. Release Rate µCi/sec l.42E-02 2.34E-02 l.29E-02 l.04E-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.09E+00 1.llE+00 1.12E+00 l.16E+00 4.47E+00
2. Avg. Release Rate µCi/sec 1.40E-01 1.41E-01 l.41E-01 1.46E-01 Tritium
1. Total Release Ci 3.59E+00 4.94E+00 3.84E+00 5.86E+00 l.82E+0l
2. Avg. Release Rate µCi/sec 4.62E-01 6.28E-01 4.84E-01 7.37E-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 7 of89

EFFLUENT AND WASTE DISPOSAL REPORT TABLE lA GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES Unit 2 REPORT FOR 2022 Units QTR 1 QTR2 QTR3 QTR4 YEAR Fission & Activation Gases

1. Total Release Ci 1.0lE-01 1.08E-01 4.52E-02 4.13E-02 2.95E-01
2. Avg. Release Rate µCi/sec 1.29E-02 1.37E-02 5.69E-03 5.20E-03 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 1.12E+00 7.79E-01 1.16E+00 1.llE+00 4.16E+00
2. Avg. Release Rate µCi/sec 1.44E-01 9.90E-02 1.46E-01 1.39E-01 Tritium
1. Total Release Ci 3.22E+01 3.99E+0l 1.42E+0l 2.71E+0l 1.14E+02
2. Avg. Release Rate µCi/sec 4.14E+00 5.08E+00 1.79E+00 3.41E+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 8 of89

EFFLUENT AND WASTE DISPOSAL REPORT TABLE lC GASEOUS EFFLUENTS - MIXED MODE RELEASES - CONTINUOUS MODE Unit 1 REPORT FOR Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases Xe-133 Ci (1) 5.17E-02 1.28E-02 (1) 6.45E-02 Totals for Ci (1) 5.17E-02 1.28E-02 (1) 6.45E-02 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 1.09E+00 1.llE+00 1.12E+00 1.16E+00 4.47E+00 Totals for Ci 1.09E+00 1.llE+00 1.12E+00 1.16E+00 4.47E+00 Tritium H-3 Ci 3.39E+00 4.67E+00 3.57E+00 5.61E+00 1.72E+0l Totals for Ci 3.39E+00 4.67E+00 3.57E+00 5.61E+00 1.72E+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 9 of 89

EFFLUENT AND WASTE DISPOSAL REPORT TABLE lC GASEOUS EFFLUENTS- MIXED MODE RELEASES- BATCH MODE Unit 1 REPORT FOR Units QTR 1 QTR 2 QTR3 QTR4 YEAR Fission and Activation Gases Ar-41 Ci 7.44E-02 7.98E-02 8.70E-02 7.87E-02 3.20E-01 Kr-85m Ci l.23E-04 l.62E-04 (1) (1) 2.85E-04 Kr-88 Ci 4.42E-05 8.63E-05 (1) (1) l.31E-04 Xe-131m Ci (1) 5.61E-05 (1) (1) 5.61E-05 Xe-133m Ci 8.45E-04 6.68E-04 (1) (1) l.SlE-03 Xe-133 Ci 3.04E-02 4.21E-02 2.33E-03 3.63E-03 7.85E-02 Xe-135 Ci 4.90E-03 9.07E-03 4.26E-06 (1) l.40E-02 Totals for Ci 1.llE-01 1.32E-01 8.94E-02 8.24E-02 4.14E-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 2.03E-01 2.66E-01 2.75E-01 2.41E-01 9.85E-01 Totals for Ci 2.03E-01 2.66E-01 2.75E-01 2.41E-01 9.85E-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 10 of89

EFFLUENT AND WASTE DISPOSAL REPORT TABLE lC GASEOUS EFFLUENTS - MIXED MODE RELEASES - CONTINUOUS MODE Unit 2 REPORT FOR Units QTR 1 QTR 2 QTR 3 QTR4 YEAR Fission and Activation Gases Xe-133 Ci (1) 5.17E-02 1.28E-02 (1) 6.45E-02 Totals for Ci (1) 5. l 7E-02 1.28E-02 (1) 6.45E-02 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 1.12E+00 7.79E-01 1.16E+00 1.llE+00 4.16E+00 Totals for Ci 1.12E+00 7.79E-01 1.16E+00 1.llE+00 4.16E+00 Tritium H-3 Ci 3.21E+0l 3.98E+0l 1.42E+0l 2.71E+0l 1.13E+02 Totals for Ci 3.21E+0l 3.98E+0l 1.42E+0l 2.71E+0l 1.13E+02 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 11 of 89

EFFLUENT AND WASTE DISPOSAL REPORT TABLE lC GASEOUS EFFLUENTS - MIXED MODE RELEASES - BATCH MODE Unit 2 REPORT FOR Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases Ar-41 Ci 3.36E-02 1. 73E-02 2.40E-02 3.13E-02 l.06E-01 Kr-85m Ci 1.23E-04 1.62E-04 (1) (1) 2.85E-04 Kr-88 Ci 4.42E-05 8.63E-05 (1) (1) l.31E-04 Xe-131m Ci (1) 5.61E-05 (1) (1) 5.61E-05 Xe-133m Ci 8.45E-04 6.68E-04 (1) (1) 1.SlE-03 Xe-133 Ci 6.12E-02 2.90E-02 8.39E-03 1.00E-02 1.09E-01 Xe-135 Ci 4.90E-03 9.07E-03 4.26E-06 (1) 1.40E-02 Totals for Ci l.0lE-01 5.63E-02 3.24E-02 4.13E-02 2.31E-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 7.54E-02 1. lOE-01 3.83E-02 6.57E-02 2.89E-01 Totals for Ci 7.54E-02 1.lOE-01 3.83E-02 6.57E-02 2.89E-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 89

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2A LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES Unit 1 REPORT FOR 2022 Units QTR 1 QTR 2 QTR 3 QTR4 YEAR Fission and Activation Products

1. Total Release Ci 3.39E-03 8.S0E-03 9.S0E-04 1.30E-03 1.41E-02
2. Avg. Diluted Cone. µCi/ml 1.03E-09 2.46E-09 2.46E-10 3.39E-10 9.79E-10 Tritium
1. Total Release Ci 4.40E+02 2.21E+02 6.54E+0l 3.47E+02 1.07E+03
2. Avg. Diluted Cone. µCi/ml 1.34E-04 6.40E-05 1.69E-05 9.02E-05 7.42E-05 Dissolved & Entrained Gases
1. Total Release Ci 9.26E-05 7.75E-06 (1) 9.88E-06 1.lOE-04
2. Avg. Diluted Cone. ~tCi/ml 2.82E-11 2.24E-12 N/A 2.57E-12 7.63E-12 Gross Alpha Radioactivity
1. Total Release Ci 9.26E-05 7.75E-06 (1) 9.88E-06 1. lOE-04 Volume of liquid waste Liters 3.28E+09 3.45E+09 3.87E+09 3.85E+09 1.45E+10 Volume of dil. water Liters 6.56E+09 6.90E+09 7.74E+09 7.69E+09 2.89E+10 (1) Less than minimum detectable activity which meets the lower limit of detection {LLD) requirements of TRM Section 3.11 Page 13 of 89

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2A - Batch LIQUID EFFLUENTS - SUMMATION BY RELEASE POINT Unit 1 REPORT FOR 2022 Units QTR 1 QTR 2 QTR 3 QTR4 YEAR Fission and Activation Products

1. Total Release Ci 3.39E-03 8.S0E-03 9.S0E-04 1.30E-03 l.41E-02
2. Avg. Diluted Cone. µCi/ml 3.SSE-06 7.83E-06 1.92E-06 2.31E-06 4.67E-06 Tritium
1. Total Release Ci 4.21E+02 2.03E+02 5.20E+0l 3.27E+02 1.00E+03
2. Avg. Diluted Cone. µCi/ml 4.77E-01 1.87E-01 1.0SE-01 5.79E-01 3.31E-01 Dissolved & Entrained Gases
1. Total Release Ci 9.26E-05 7.75E-06 (1) 9.88E-06 1.l0E-04
2. Avg. Diluted Cone. µCi/ml 1.0SE-07 7.13E-09 N/A 1.75E-08 3.64E-08 Gross Alpha Radioactivity
1. Total Release Ci 9.26E-05 7.75E-06 (1) 9.88E-06 1.l0E-04 Volume of liquid waste Liters 8.82E+0S 1.09E+06 4.96E+0S 5.6SE+0S 3.03E+06 Volume of dil. water Liters 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2.89E+10 (1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements of TRM Section 3.11 Page 14 of 89

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2A - Continuous LIQUID EFFLUENTS - SUMMATION BY RELEASE POINT Unit 1 REPORT FOR 2022 Units QTR 1 QTR 2 QTR 3 QTR4 YEAR Fission and Activation Products

1. Total Release Ci (1) (1) (1) (1) (1)
2. Avg. Diluted Cone. ~tCi/ml N/A N/A N/A N/A N/A Tritium
1. Total Release Ci 1.89E+0l l.80E+0l 1.34E+0l 1.98E+0l 7.0lE+0l
2. Avg. Diluted Cone. µCi/ml 5.76E-06 5.23E-06 3.47E-06 5.14E-06 4.85E-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 3.28E+09 3.45E+09 3.87E+09 3.85E+09 1.44E+l0 Volume of dil. water Liters 6.56E+09 6.90E+09 7.74E+09 7.69E+09 2.89E+l0 (1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements ofTRM Section 3.11 Page 15 of 89

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2A LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES Unit 2 REPORT FOR 2022 Units QTR 1 QTR 2 QTR3 QTR4 YEAR Fission and Activation Products

1. Total Release Ci 3.39E-03 8.S0E-03 9.S0E-04 1.30E-03 1.41E-02
2. Avg. Diluted Cone. µCi/ml 1.03E-09 2.46E-09 2.46E-10 3.39E-10 9.79E-10 Tritium
1. Total Release Ci 4.40E+02 2.21E+02 6.54E+0l 3.47E+02 1.07E+03
2. Avg. Diluted Cone. µCi/ml 1.34E-04 6.40E-05 1.69E-05 9.02E-05 7.42E-05 Dissolved & Entrained Gases
1. Total Release Ci 9.26E-05 7.75E-06 (1) 9.88E-06 1.lOE-04
2. Avg. Diluted Cone. µCi/ml 2.82E-11 2.24E-12 N/A 2.57E-12 7.63E-12 Gross Alpha Radioactivity
1. Total Release Ci 9.26E-05 7.75E-06 (1) 9.88E-06 1.lOE-04 Volume of liquid waste Liters 3.28E+09 3.45E+09 3.87E+09 3.85E+09 1.45E+10 Volume of dil. water Liters 6.56E+09 6.90E+09 7.74E+09 7.69E+09 2.89E+10 (1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements ofTRM Section 3.11 Page 16 of89

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2A - Batch LIQUID EFFLUENTS - SUMMATION BY RELEASE POINT Unit 2 REPORT FOR 2022 Units QTR 1 QTR 2 QTR 3 QTR4 YEAR Fission and Activation Products

1. Total Release Ci 3.39E-03 8.S0E-03 9.S0E-04 1.30E-03 l.41E-02
2. Avg. Diluted Cone. µCi/ml 3.85E-06 7.83E-06 1.92E-06 2.31E-06 4.67E-06 Tritium
1. Total Release Ci 4.21E+02 2.03E+02 5.20E+0l 3.27E+02 l.O0E+03
2. Avg. Diluted Cone. µCi/ml 4.77E-01 1.87E-01 1.0SE-01 5.79E-01 3.3 lE-01 Dissolved & Entrained Gases
1. Total Release Ci 9.26E-05 7.75E-06 (1) 9.88E-06 1.l0E-04
2. Avg. Diluted Cone. µCi/ml 1.0SE-07 7.13E-09 N/A 1.75E-08 3.64E-08 Gross Alpha Radioactivity
1. Total Release Ci 9.26E-05 7.75E-06 (1) 9.88E-06 1.lOE-04 Volume of liquid waste Liters 8.82E+0S 1.09E+06 4.96E+05 5.65E+05 3.03E+06 Volume of dil. water Liters 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2.89E+10 (1) Less than minimum detectable activity which meets the lower limit of detection (LLD) requirements ofTRM Section 3.11 Page 17 of 89

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2A - Continuous LIQUID EFFLUENTS - SUMMATION BY RELEASE POINT Unit 2 REPORT FOR 2022 Units QTR 1 QTR 2 QTR 3 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 1.89E+0l 1.80E+0l 1.34E+0l 1.98E+0l 7.0lE+0l
2. Avg. Diluted Cone. µCi/ml 5.76E-06 5.23E-06 3.47E-06 5.14E-06 4.85E-06 Dissolved & Entrained Gases
1. Total Release Ci (1) (1) (1) (1) (1)
2. Avg. Diluted Cone. ~tCi/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 3.28E+09 3.45E+09 3.87E+09 3.85E+09 1.44E+10 Volume of dil. water Liters 6.56E+09 6.90E+09 7.74E+09 7.69E+09 2.89E+10 (1) Less than minimum detectable activity which meets the lower limit of detection {LLD) requirements ofTRM Section 3.11 Page 18 of 89

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2B LIQUID EFFLUENTS - BATCH MODE Unit 1 REPORT FOR Units QTR 1 QTR 2 QTR3 QTR4 YEAR Fission and Activation Products Te-123m Ci (1) 7.04E-05 (1) (1) 7.04E-05 Cr-51 Ci 6.54E-05 1.88E-04 (1) (1) 2.53E-04 Mn-54 Ci 3.29E-05 1.SSE-05 1.74E-06 3.94E-06 5.41E-05 Co-57 Ci 9.69E-06 2.59E-06 1.27E-06 2.23E-06 l.58E-05 Co-58 Ci 9.77E-04 9.43E-04 6.06E-04 4.53E-04 2.98E-03 Co-60 Ci 1.25E-03 8.00E-04 2.93E-04 2.86E-04 2.63E-03 Ni-63 Ci (1) (1) 4.90E-04 5.04E-04 9.94E-04 Zr-95 Ci (1) 1.28E-06 (1) (1) l.28E-06 Nb-95 Ci 1.77E-05 9.83E-06 (1) (1) 2.75E-05 Ag-110m Ci 1.47E-06 (1) (1) (1) 1.47E-06 Sb-124 Ci 6.24E-06 7.61E-06 (1) (1) 1.38E-05 Sb-125 Ci 1.03E-03 1.08E-03 4. 71E-05 5.34E-05 2.21E-03 Te-125m Ci (1) 5.37E-03 (1) (1) 5.37E-03 Te-132 Ci (1) 8.83E-06 (1) (1) 8.83E-06 Cs-137 Ci (1) (1) 1.39E-06 (1) l.39E-06 Totals for Ci 3.39E-03 8.S0E-03 1.44E-03 l.30E-03 1.46E-02 Tritium H-3 Ci 4.21E+02 2.03E+02 5.20E+01 3.27E+02 1.00E+03 Totals for Ci 4.21E+02 2.03E+02 5.20E+0l 3.27E+02 1.00E+03 Dissolved and Entrained Gases Xe-133 Ci 9.26E-05 7.75E-06 (1) 9.88E-06 l.l0E-04 Totals for Ci 9.26E-05 7.75E-06 (1) 9.88E-06 1.l0E-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 19 of 89

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2B LIQUID EFFLUENTS - CONTINUOUS MODE Unit 1 REPORT FOR Units QTR 1 QTR 2 QTR 3 QTR4 YEAR Fission and Activation Products

    • No Nuclide Activities** (1) (1) (1) (1) (1)

Tritium H-3 Ci 1.89E+0l 1.S0E+0l 1.34E+0l 1.98E+0l 7.0lE+0l Totals for Ci 1.89E+0l 1.S0E+0l 1.34E+0l 1.98E+0l 7.0lE+0l 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 ofTRM Section 3.11 Page 20 of 89

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2B LIQUID EFFLUENTS - BATCH MODE Unit 2 REPORT FOR Units QTR 1 QTR 2 QTR3 QTR4 YEAR Fission and Activation Products Te-123m Ci (1) 7.04E-05 (1) (1) 7.04E-05 Cr-51 Ci 6.54E-05 l.88E-04 (1) (1) 2.53E-04 Mn-54 Ci 3.29E-05 l.SSE-05 1.74E-06 3.94E-06 5.41E-05 Co-57 Ci 9.69E-06 2.59E-06 1.27E-06 2.23E-06 l.58E-05 Co-58 Ci 9.77E-04 9.43E-04 6.06E-04 4.53E-04 2.98E-03 Co-60 Ci 1.25E-03 8.00E-04 2.93E-04 2.86E-04 2.63E-03 Ni-63 Ci (1) (1) 4.90E-04 5.04E-04 9.94E-04 Zr-95 Ci (1) 1.28E-06 (1) (1) l.28E-06 Nb-95 Ci 1.77E-05 9.83E-06 (1) (1) 2.75E-05 Ag-ll0m Ci 1.47E-06 (1) (1) (1) l.47E-06 Sb-124 Ci 6.24E-06 7.61E-06 (1) (1) l.38E-0S Sb-125 Ci 1.03E-03 1.08E-03 4.71E-05 5.34E-05 2.21E-03 Te-125m Ci (1) 5.37E-03 (1) (1) 5.37E-03 Te-132 Ci (1) 8.83E-06 (1) (1) 8.83E-06 Cs-137 Ci (1) (1) 1.39E-06 (1) l.39E-06 Totals for Ci 3.39E-03 8.S0E-03 1.44E-03 1.30E-03 l.46E-02 Tritium H-3 Ci 4.21E+02 2.03E+02 5.20E+0l 3.27E+02 l.00E+03 Totals for Ci 4.21E+02 2.03E+02 5.20E+0l 3.27E+02 l.00E+03 Dissolved and Entrained Gases Xe-133 Ci 9.26E-05 7.75E-06 (1) 9.88E-06 l.lOE-04 Totals for Ci 9.26E-05 7.75E-06 (1) 9.88E-06 1.lOE-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 89

EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2B LIQUID EFFLUENTS - CONTINUOUS MODE Unit 2 REPORT FOR Units QTR 1 QTR 2 QTR 3 QTR4 YEAR Fission and Activation Products

    • No Nuclide Activities** (1) (1) (1) (1) (1)

Tritium H-3 Ci 1.89E+0l 1.80E+0l 1.34E+0l 1.98E+0l 7.0lE+0l Totals for Ci 1.89E+0l 1.80E+0l 1.34E+0l 1.98E+0l 7.0lE+0l 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 ofTRM Section 3.11 Page 22 of 89

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 Design

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

Maximum Location Gamma Air Dose l.77E-04 All 1.77E-03 10 mrad Maximum Location Beta Air Dose 5.65E-05 All 2.83E-04 20 mrad Maximum Location Total Body l.68E-04 All 3.36E-03 5 mrem Maximum Location Skin 2.39E-04 All 1.60E-03 15 mrem Non-Noble Gas Maximum Individual Bone l.17E+00 Child 7.79E+00 15 mrem Liquid Maximum Individual Total Body l.08E-02 Child 3.61E-01 3 mrem Maximum Individual GI-Lli l.12E-02 Child l.12E-01 10 mrem 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 2 Design

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

Maximum Location Gamma Air Dose 6.26E-05 All 6.26E-04 10 mrad Maximum Location Beta Air Dose 2.59E-05 All l.30E-04 20 mrad Maximum Location Total Body 5.90E-05 All l.18E-03 5 mrem Maximum Location Skin 8.62E-05 All 5.75E-04 15 mrem Non-Noble Gas Maximum Individual Bone 1.09E+00 Child 7.24E+00 15 mrem Liquid Maximum Individual Total Body 1.08E-02 Child 3.61E-01 3 mrem Maximum Individual GI-Lli 1.12E-02 Child 1.12E-01 10 mrem EFFLUENT AND WASTE DISPOSAL REPORT Summary of Doses to Members of the Public at the Highest Dose RecE:?p~ors for 40CFRl.9_Qc1_11d 10CFR7J._1Q4 Com_pliance On-Site %of Highest Dose Non-Noble Noble Gas Liquid Storage Total Applicable Limit Unit Receptors Gas Facilities Limit Total Body 2.27E-04 4.75E-01 2.17E-02 0.00E+00 4.97E-01 1.99E+00 25 mrem Organ Dose N/A 2.25E+00 2.25E-02 0.00E+00 2.28E+00 9.llE+00 25 mrem Page 23 of89

SOLID RADIOACTIVE WASTE FOR BURIAL 1ST QUARTER 2022-None SOLID RADIOACTIVE WASTE FOR BURIAL 2No QUARTER 2022 DATE DISPOSITION OF MATERIAL VOLUME MODE OF CURIES* PER Shipment# (DESCRIPTION, CLASS, TYPE DESTINATION (m 3 ) PER Description TRANSPORT/ SHIPMENT AND SOLIDIFYING AGENT) SHIPMENT CARRIER 4/22/22 UN3321, RADIOACTIVE MATERIAL, LOW Highway Gallaher Road RWS22-01 SPECIFIC ACTIVITY(LSA-II), 7, METAL BOX(1) Hitman Transport Processing Facility 7.65E+00 245E-03 Resin CLASS A, NONE EXCLUSIVE USE Kingston, TN 4/28/22 UN3321, RADIOACTIVE MATERIAL, LOW Highway Energy Solutions RWS22-02 SPECIFIC ACTIVITY(LSA-II), 7, METAL BOX(1) Hilman Transport Bear Creek Facility 2.69E+01 1.14E-01 DAW CLASS A, NONE EXCLUSIVE USE Oak Ridge, TN 5/5/22 UN3321, RADIOACTIVE MATERIAL, LOW Highway Energy Solutions RWS22-03 SPECIFIC ACTIVITY(LSA-II), 7, METAL BOX(1) Hilman Transport Bear Creek Facility 5.18E+01 1.55E-01 DAW CLASS A, NONE EXCLUSIVE USE Oak Ridge, TN 5/7/22 UN3321, RADIOACTIVE MATERIAL, LOW Highway Energy Solutions RWS22-04 SPECIFIC ACTIVITY(LSA-II), 7, METAL BOX(1) Hilman Transport Bear Creek Facility 1.70E+01 1.01 E-04 DAW CLASS A, NONE EXCLUSIVE USE Oak Ridge, TN 5/8/22 UN3321, RADIOACTIVE MATERIAL, LOW Highway Energy Solutions RSW22-05 SPECIFIC ACTIVITY(LSA-II), 7, METAL BOX(1) Hitman Transport Bear Creek Facility 1.70E+01 8.55E-05 Sand CLASS A, NONE EXCLUSIVE USE Oak Ridge, TN Number of Quarterly Totals 5 1.20E+02 2.72E-01 Shipments:

  • Calculated using measured ratios CUBIC M CURIES SOLID RADIOACTIVE WASTE FOR BURIAL 3Ro QUARTER 2022 DATE DISPOSITION OF MATERIAL MODE OF VOLUME (m 3 )

Shipment# (DESCRIPTION, CLASS, TYPE AND TRANSPORT/ CURIES* PER DESTINATION PER Description SOLIDIFYING AGENT) CARRIER SHIPMENT SHIPMENT 7/28/22 UN3321, RADIOACTIVE MATERIAL, LOW Highway Energy Solutions RWS22-06 SPECIFIC ACTIVITY(LSA-II), 7, METAL CASK (1) Hilman Transport Clive Disposal Site 4.39E+00 6.65E+00 Dewatered Resin CLASS A, NONE EXCLUSIVE USE Clive, UT 8/11/22 UN3321, RADIOACTIVE MATERIAL, LOW Highway Energy Solutions RWS22-07 SPECIFIC ACTIVITY(LSA-II), 7, METAL Hilman Transport Clive Disposal Site 4.53E+00 5.19E+00 Spent Resin SHIELDED CASK (1) CLASS A, NONE EXCLUSIVE USE Clive, UT 9/22/22 UN3321, RADIOACTIVE MATERIAL, LOW Highway Energy Solutions RWS22-08 SPECIFIC ACTIVITY(LSA-II), 7, METAL Hilman Transport Clive Disposal Site 5.03E+00 3.91 e+00 Dewatered Resin SHIELDED CASK (1) CLASS A, NONE EXCLUSIVE USE Clive, UT Number of Quarterly Totals 3 1.50E+01 1.58E+00 Shipments:

  • Calculated using measured ratios CUBIC M CURIES Page 24 of 89

SOLID RADIOACTIVE WASTE FOR BURIAL 4TH QUARTER 2022 DATE DISPOSITION OF MATERIAL MODE OF VOLUME(m 3 ) CURIES*

Shipment# (DESCRIPTION, CLASS, TYPE TRANSPORT/ DESTINATION PER PER Description AND SOLIDIFYING AGENT) CARRIER SHIPMENT SHIPMENT 10/6/22 RWS22-09 UN3321, RADIOACTIVE MATERIAL, LOW Highway Energy Solutions Dewatered SPECIFIC ACTIVITY(LSA-11), 7, METAL Hilman Transport Clive Disposal Site 4.53E+00 4.38E+00 Resin SHIELDED CASK (1) CLASS A, NONE EXCLUSIVE USE Clive, UT 10/13/22 RWS22-10 UN3321, RADIOACTIVE MATERIAL, LOW Highway Energy Solutions Dewatered SPECIFIC ACTIVITY(LSA-II), 7, METAL Hilman Transport Clive Disposal Site 4.96E+00 6.52E+00 Resin SHIELDED CASK (1) CLASS A, NONE EXCLUSIVE USE Clive, UT 10/27/22 UN3321, RADIOACTIVE MATERIAL, LOW Highway Energy Solutions RWS22-11 SPECIFIC ACTIVITY(LSA-11), 7, METAL BOX(1) Hilman Transport Bear Creek Facility 7.10E+01 8.15E-02 DAW CLASS A, NONE EXCLUSIVE USE Oak Ridge, TN 11/9/22 UN3321, RADIOACTIVE MATERIAL, LOW Highway Energy Solutions RWS22-12 SPECIFIC ACTIVITY(LSA-11), 7, METAL BOX(1) Hilman Transport Bear Creek Facility 9.17E+00 5.73E-03 Oil Totes CLASS A, NONE EXCLUSIVE USE Oak Ridge, TN 12/7/22 UN3321, RADIOACTIVE MATERIAL, LOW Highway Energy Solutions RWS22-13 SPECIFIC ACTIVITY(LSA-11), 7, METAL BOX(1) Hilman Transport Bear Creek Facility 3.58E+01 1.75E-02 DAW CLASS A, NONE EXCLUSIVE USE Oak Ridge, TN 12/14/22 UN3321, RADIOACTIVE MATERIAL, LOW Highway Energy Solutions RSW22-14 SPECIFIC ACTIVITY(LSA-11), 7, METAL BOX(1) Hilman Transport Bear Creek Facility 3.58E+01 2.01E-02 DAW CLASS A, NONE EXCLUSIVE USE Oak Ridge, TN Number of Quarterly Totals 6 1.61 E+02 1.10E+01 Shipments:

  • Calculated using measured ratios CUBIC M CURIES Page 25 of89

SOLID RADIOACTIVE WASTE FOR BURIAL Estimated Solid Waste Composition 2022 Resins, Filters, Evap Bottoms Dry Actise Waste Other Waste 2022 2022 2022 Volume (m3) 3.11E+01 Volume (m3) 2.55E+02 Volume (m3) 9.17E+00 Class A Class A Class A Nuclide  % Abund Curies uCi/ml Nuclide  % Abund Curies uCi/ml  % Abund Curies uCi/ml H-3 49.34 1.32E+01 4.24E-01 H-3 11.35 4.44E-02 1.74E-04 H-3 0.66 3.83E-05 4.18E-06 C-14 0.00 1.51 E-04 4.86E-06 C-14 0.13 5 05E-04 1.98E-06 C-14 0.16 9.38E-06 1.02E-06 Cr-51 0.00 3.21 E-04 1 03E-05 Cr-51 16.39 6.41 E-02 2.51E-04 Cr-51 10.40 5.99E-04 6.53E-05 Mn-54 0.59 1.58E-01 5.08E-03 Mn-54 1.20 4.69E-03 1.84E-05 Mn-54 1.52 8.75E-05 9.54E-06 Fe-55 6.36 1.70E+00 5.47E-02 Fe-55 19.73 7.71 E-02 3.02E-04 Fe-55 25.00 1.44E-03 1.57E-04 Fe-59 0.00 2.36E-04 7.59E-06 Co-57 0.09 3.53E-04 1.38E-06 Co-57 0.11 6.57E-06 7.16E-07 Co-57 0.15 4.11E-02 1.32E-03 Co-58 10.36 4.05E-02 1.59E-04 Co-58 11.43 6.58E-04 7.18E-05 Co-58 4.00 1.07E+00 3.44E-02 Co-60 24.65 9.64E-02 3.78E-04 Co-60 31.19 1.S0E-03 1.96E-04 Co-60 9.15 2.44E+00 7.85E-02 Ni-63 9.50 3.71 E-02 1.45E-04 Ni-63 11.99 6.91 E-04 7.54E-05 Ni-59 0.00 4 05E-06 1.30E-07 Zr-95 1.59 6.20E-03 2.43E-05 Zr-95 1. 70 9.77E-05 1.07E-05 Ni-63 28.77 7.68E+00 2.47E-01 Nb-95 2.98 1.17E-02 4.59E-05 Nb-95 3.34 1. 92E-04 2 09E-05 Zn-65 0.04 1.15E-02 3.70E-04 Sb-125 1.56 6.10E-03 2.39E-05 Sb-125 1.98 1.14E-04 1.24E-05 Sr-89 0.00 7.42E-09 2.39E-10 Cs-137 0.33 1.30E-03 5.10E-06 Cs-137 0.42 2.42E-05 2.64E-06 Zr-89 0.00 2.44E-03 7.85E-05 Ce-144 0.07 2.61 E-04 1.02E-06 Ce-144 0.08 4.87E-06 5.31E-07 Nb-95 0.03 8.36E-03 2.69E-04 Ra-226 0.05 1.84E-04 7.22E-07 Pu-238 0.00 1.41E-07 1.54E-08 Tc-99 0.00 2.89E-07 9.29E-09 Pu-238 0.00 7.59E-06 2.98E-08 Ce-146 0 00 1. 96E-07 2.14E-08 Ag-110m 0.01 1.78E-03 5.72E-05 Am-241 0.00 1 06E-05 4.16E-08 Sn-113 0.01 3.91E-03 1.26E-04 Sn-117m 0.00 1.53E-08 4.92E-10 Irradiated Components Sb-124 0 00 9.16E-04 2.95E-05 2022 Sb-125 1.46 3.89E-01 1.25E-02 Volume (m3) 0.00E+00 Te-129m 0.00 6.40E-03 2 06E-04 Class N/A 1-131 0.00 4.91E-11 1.58E-12 No Shipments Cs-137 0.07 1. 75E-02 5.63E-04 Ce-144 0.00 1.00E-07 3.22E-09 Am-241 0 00 1 07E-08 3.44E-10 Page 26 of 89

SOLID RADIOACTIVE WASTE FOR BURIAL Estimated Solid Waste Composition 2022 Total Combined 2022 Volume (m3) 2.96E+02 Class A Nuclide  % Abund Curies uCi/ml H-3 48.78 1.32E+01 4.46E-02 C-14 0.00 6.64E-04 2.24E-06 Mn-54 0.60 1.63E-01 5.51 E-04 Fe-55 6.55 1.77E+00 5.98E-03 Fe-59 0.00 2.39E-04 8.07E-07 Co-57 0.15 4.15E-02 1.40E-04 Co-58 4.09 1.11E+00 3.75E-03 Co-60 9.38 2.54E+00 8.58E-03 Ni-59 0.00 4.05E-06 1.37E-08 Ni-63 28.49 7.71E+00 2.60E-02 Zn-65 0.04 1.15E-02 3.89E-05 Sr-89 0.00 4.42E-09 1.49E-11 Zr-95 0.03 8.73E-03 2.95E-05 Nb-95 0.07 2.02E-02 6.82E-05 Tc-99 0.00 2.89E-07 9.76E-10 Pu-238 0.00 7.73E-06 2.61E-08 Ag-110m 0.01 1.78E-03 6.01E-06 Sb-125 1.46 3.95E-01 1.33E-03 Cs-137 0.07 1.89E-02 6.39E-05 Ce-144 0.00 2.66E-04 8.99E-07 Sn-113 0.01 3.91 E-03 1.32E-05 Sn-117m 0.00 1.53E-08 5.17E-11 Sb-124 0.00 9.16E-04 3.09E-06 Am-241 0.00 1.08E-05 3.65E-08 Te-129m 0.00 6.40E-05 2.16E-07 Ra-226 0.00 1.84E-04 6.22E-07 1-131 0.00 4.91E-11 1.66E-13 Page 27 of89

Process Control Program (PCP) for Radioactive Wastes There were no changes to RW-AA-100, Process Control Program (PCP) for Radioactive Waste, in 2022.

Page 28 of 89

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%

Orne= 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 29 of 89

Miscellaneous Information A As required by Technical Specification 5.6.2, meteorological and environmental impact information is reported in the 2022 Annual Radiological Environmental Operating Report (AREOR) or is retained on file to be provided upon request.

B. No limits were exceeded during the 2022 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 2022 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. In 2022, seven (7) additional cask were placed on the pad for a total of fifty (50). 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 2022 reporting period. There were no REMP sample results that exceeded TRM or analytical result investigation levels. Cs-137 was present in the May 2022 sampling of sediment and can be present in local sediment/soil samples as a result of fallout from weapons testing and/or the Chernobyl and Fukushima nuclear accidents and this measured Cs-137 is not attributed to Byron plant effluents. No radionuclides that were a result of plant effluents were detected in any of the other REMP samples E. There were no elevated releases during the 2022 reporting period. All planned gaseous releases are considered mixed mode releases and were discharged by way of the plant vent stacks.

F. There were no unplanned gaseous or liquid releases to unrestricted areas during the 2022 reporting period.

G. The Rock River flow measurements during liquid effluent discharges were obtained from the U.S.

Geological Survey Byron normally but used Dixon from date 1/4/22 to 2/16/22, and Como Gauging Station from 12/20/22 to 12/28/22 for the Rock River, due to frozen river conditions.

H. In March of 2022 a liquid released was authorized and released. During the creation of the release permit an error was made when manually entering the nuclides from the sample results. After the release new pre- releases and post- releases were made with the corrected nuclides and no dose limits were exceeded.

Page 30 of 89

I. Attached are offsite dose calculation reports, meteorological data, and LLDs for January through December of 2022.

Page 31 of 89

The following are the maximum annual calculated cumulative offsite doses resulting from Bryon airborne releases in 2022 based on concurrent meteorolog ical data:

Unit 1:

Dose Maxlmum Value Sector Affected gamma air <1) 3.370 x 10-~ mrad North-Northwest beta air 12l 1 370 x 10-5 mrad North-Northwest who le body i3l 7.530 x 10*"' mrem North-Northwest Skin (4 i 3.650 x 10-5 mrem North-Northwest organ {;l;I (child-bone) 3. 700 x 10-1 mrem North-Northwest Unit 1 Compliance Status 10 CFR SO Appendix I Yearfy Objective  % of Appendix I gamma air 10.0 mrad 0.00 beta air 20.0 mrad 0.00 whole body 5.0 mrem 1.51 s'kin 15.0 mrem 0.00 organ 15.0 mrem 2.47 Unit 2:

Sector Dose MrJximum Value Affected gamma sir (1 1 1.340 X 1Q*;, mrad North-Northwest beta air <2* 1.080 x 10 5 mrad N Orth-Northwest whole body (JI 8.170 x 10*2 mrem North~N orthwesl skin l4l 1.580 x 10 5 mrem North-No rthwe.st organ (61 (child-bone) 3 820 x 1O1 mrem North-Northwes.t Unit 2 Compliance Status 10 CFR 50 Appendix I Yearly Objective  % of Appendix I gamma air 10.0 mrad 0.00 beta air 20,0 mra.d 0.00 Whole body 5.0 mrem 1,63 skin 15.0 mrem 0.00 organ 15 0 mrem 2.55 fl Gamm.a Air Dose. GASPAR ii, NUREG-0597 m Seta Air Dose - GA.SPAR 11, NUREG-0597 IJI Whole Body Dose. GASPAR Ii, NUREG-0597

!4l Skin Dose - GASPAR II, NURE.G-0597

("l lnh-alaCion and f(l(ld Pathways Dose - GASPAR ll, NUREG-0097 Page 32 of89

Attachment A, 2022 RadioactilB Effluent Release Report 2022 Lower Limits of Detection (LLD's)

Gaseous Required Liquid Required Nuclide LLD (uCi/cc) Gaseous LLD (uCi/cc) Nuclide LLD (uCi/ml) Liquid LLD (uCi/cc)

H3 4.52E-08 1.00E-07 H3 1.81 E-06 1.00E-05 Mn54 4.30E-14 1.00E-11 Mn54 1.13E-08 5.00E-07 Co58 5.08E-14 1.00E-11 Fe55 6.27E-07 1. 00E-06 Fe59 8.63E-14 1.00E-11 Co58 1.36E-08 5 00E-07 Co60 6.51 E-14 1.00E-11 Fe59 2.52E-08 5.00E-07 Zn65 6.78E-14 1.00E-11 Co60 2.21E-08 5 00E-07 Kr87 2.87E-08 1.00E-04 Zn65 2.02E-08 5.00E-07 Kr88 4.72E-08 1.00E-04 Kr85m 1.44E-08 1.00E-05 Sr89 1.90E-14 1.00E-11 Kr87 2.91E-08 1.00E-05 Sr-90 2.48E-15 1.00E-11 Kr88 4.80E-08 1.00E-05 Mo99 8.22E-14 1.00E-11 Sr89 4.54E-08 5.00E-08 1131 7.29E-14 1.00E-12 Sr90 1.26E-08 5.00E-08 1133 2.86E-13 1.00E-10 Mo99 1.11 E-08 5.00E-07 Xe133 2.40E-08 1.00E-04 Xe131m 2.38E-08 1.00E-05 Xe133m 1.00E-07 1.00E-04 1131 1.11E-08 1 00E-06 Cs134 3.21 E-14 1.00E-11 Xe133 1 01 E-07 1.00E-05 Xe135 1.09E-08 1.00E-04 Xe133m 9.75E-08 1. 00E-05 Cs137 4.44E-14 1 00E-11 Cs134 1.13E-08 5 00E-07 Xe138 4.49E-08 1.00E-04 Xe135 1.18E-08 1.00E-05 Ce141 7.39E-14 1.00E-11 Cs137 1.27E-08 5.00E-07 Ce144 2.81E-13 1.00E-11 Xe138 1.01 E-07 1.00E-05 Gross Alpha 2.73E-15 1.00E-11 Ce141 1.89E-08 5.00E-07 Ce144 9.27E-08 5.00E-06 Gross Alpha 4.98E-08 1. 00E-07 Gross Beta 2.52E-07 Page 33 of 89

Wind Direction and Stability Class Byron Generating Station Period of Record: January - March 2022 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 2 1 0 0 3 NNE 1 0 0 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 0 2 4 0 0 0 6 E 0 3 0 0 0 0 3 ESE 0 3 0 0 0 0 3 SE 0 1 0 0 0 0 1 SSE 0 1 1 0 0 0 2 s 0 1 0 0 0 0 1 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 5 0 0 0 0 5 WNW 1 2 4 0 0 0 7 NW 0 1 2 0 0 0 3 NNW 0 1 5 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 2 20 18 1 0 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: 4 Page 34 of89

Byron Generating Station Period of Record: January - March 2022 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 l3-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 1 0 0 0 1 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 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 1 1 0 0 0 2 NW 0 1 3 0 0 0 4 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 2 6 0 0 0 8 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: 4 Page 35 of 89

Byron Generating Station Period of Record: January - March 2022 Stability Class - Slightly Unstable - 250Ft-30Ft Oelta-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 1 0 0 0 1 NE 0 0 4 0 0 0 4 ENE 0 0 0 0 0 0 0 E 0 0 1 0 0 0 1 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 0 0 l 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 1 1 0 0 0 2 WNW 0 0 4 3 0 0 7 NW 0 0 2 4 0 0 6 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 1 15 7 0 0 23 Hours of calm ln this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of miss stability measurements ln all stability classes: 4 Page 36 of 89

Byron Generating Station Period of Record: January - March 2022 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 0 12 59 81 0 0 152 NNE 2 14 16 5 0 0 37 NE 2 6 26 20 6 0 60 ENE 1 6 13 3 1 0 24 E 1 5 10 0 0 0 16 ESE 1 re

~ 7 19 5 0 3 SE 0 2 3 10 0 0 15 SSE 1 7 24 30 l 0 63 s 1 13 26 17 2 0 59 SSW 1 13 23 14 7 0 58 SW 2 10 43 17 4 0 76 WSW 2 13 19 11 3 0 48 w 4 25 54 39 15 9 14 6 WNW 2 26 63 52 22 0 165 NW 4 24 97 73 4 0 202 NNW 1 15 76 20 0 0 112 Variable 0 0 0 0 0 0 0 Total 25 196 55 9 411 70 9 1270 Hours of calm in this stability class: 0 Hours of miss wind measurements in this stability class: 22 Hours of missing stability measurements in all stability classes: 4 Page 37 of 89

Byron Generating Station Period of Record: January - March 2022 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 13 13 0 0 0 29 NNE 0 12 6 1 0 0 19 NE 1 5 5 2 1 0 14 ENE 2 2 2 3 0 0 9 E 3 10 3 0 0 0 16 ESE 1 8 6 7 13 1 36 SE 0 7 17 11 1 0 36 SSE 1 13 18 24 3 0 59 s 2 11 17 19 4 0 53 SSW 8 21 15 8 9 0 61 SW 12 26 15 9 1 0 63 WSW 6 22 22 2 1 4 57 w 1 23 22 4 0 0 50 WNW 6 16 6 0 1 1 30 NW 11 17 4 1 0 0 33 NNW 2 14 5 0 0 0 21 Variable 0 0 0 0 0 0 0 Total 59 220 17 6 91 34 6 586 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 26 Hours of missing stability measurements in all stability classes: 4 Page 38 of89

Byron Generating Station Period of Record: January - March 2022 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 0 1 0 0 0 3 NNE 1 j_ 1 0 0 0 0 2 NE 0 l 0 0 0 0 l ENE 4 1 0 0 0 0 5 E 1 3 0 0 0 0 4 ESE 1 2 1 0 0 0 4 SE 2 2 5 0 0 0 9 SSE 5 11 13 2 0 0 31 s 4 10 0 2 0 0 16 SSW 5 3 0 0 0 0 8 SW 3 4 0 0 0 0 7 WSW 3 2 0 0 0 0 5 w 6 2 0 0 0 0 8 WNW 9 3 0 0 0 0 12 NW 6 2 0 0 0 0 8 NNW 2 1 0 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 54 48 20 4 0 0 12 6 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 5 Hours of missing stability measurements in all stability classes: 4 Page 39 of 89

Byron Generating Station Period of Record: January - March 2022 Stability Class - Extremely Stable - 250Ft-30Ft Oelta-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 1 0 0 0 0 0 1 ENE 0 0 0 0 0 0 0 E 0 1 0 0 0 0 1 ESE 1 1 2 0 0 0 4 SE 0 4 4 0 0 0 8 SSE l 4 5 0 0 0 10 s 3 4 0 0 0 0 7 SSW 2 1 0 0 0 0 3 SW 1 0 0 0 0 0 1 WSW 3 0 0 0 0 0 3 w 2 0 0 0 0 0 2 WNW 5 0 0 0 0 0 5 NW 3 0 0 0 0 0 3 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 22 15 11 0 0 0 48 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of miss stability measurements in all stability classes: 4 Page 40 of 89

Byron Generating Station Period of Record: January - March 2022 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 3 0 0 3 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 l 0 0 l E 0 l 3 2 0 0 6 ESE l 2 l 0 0 0 4 SE 0 l l 0 0 0 2 SSE 0 l l 0 0 0 2 s 0 l 0 l 0 0 2 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0

\IJS\JJ 0 0 0 0 0 0 0 w l 4 0 0 0 0 s WNW 0 l 6 l 0 0 8 NW 0 0 2 l 0 0 3 NNW 0 l 0 4 0 0 5 Variable 0 0 0 0 0 0 0 Total 2 12 14 13 0 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: 4 Page 41 of 89

Byron Generating Station Period of Record: January - March 2022 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 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 1 1 0 2 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 1 1 0 0 2 NW 0 1 0 3 0 0 4 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 1 1 5 1 0 8 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: 4 Page 42 of89

Byron Generating Station Period of Record: January - March 2022 Stability Class - Slightly Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind (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 1 0 0 1 NE 0 0 0 4 0 0 4 ENE 0 0 0 0 0 0 0 E 0 0 0 1 0 0 1 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 0 0 1 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 2 1 0 0 3 WNW 0 0 0 9 0 0 9 NW 0 0 0 3 0 0 3 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 3 20 0 0 23 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: 4 Page 43 of 89

Byron Generating Station Period of Record: January - March 2022 Stability Class - Neutral - 250Ft-30Ft Oelta-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 7 17 63 53 1 142 NNE 1 9 17 11 10 1 49 NE 0 5 6 19 13 8 51 ENE 2 5 2 17 2 ] 29 E 0 2 3 13 1 0 19 ESE 2 1 3 12 12 6 36 SE 0 1 0 3 7 1 12 SSE 1 2 5 15 20 4 47 s 1 0 27 26 18 2 74 SSW 0 7 18 24 15 13 77 SW 0 7 21 29 14 4 75 WSW 0 11 11 23 6 3 54 w 1 10 33 43 30 21 138 WNW 2 11 71 62 33 17 196 NW 1 13 64 Bl 26 2 187 NNW 1 11 38 51 5 0 106 Variable 0 0 0 0 0 0 0 Total 13 102 336 4 92 2 65 84 1292 Hours of calm in this stability class: 0 Hours of missing wind measurements .ln this stability class: 0 Hours of missing stability measurements in all stability classes: 4 Page 44 of 89

Byron General Station Period of Record: January - March 2022 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 3 4 6 0 0 14 NNE 2 4 4 15 0 0 25 NE 1 4 9 5 2 1 22 ENE 1 1 4 5 2 0 13 E 1 7 5 0 4 0 17 ESE 0 2 5 4 4 18 33 SE 0 0 4 8 8 10 30 SSE 0 0 2 16 11 16 45 s 0 4 4 14 23 16 61 SSW 0 2 7 23 17 15 64 SW 0 6 22 19 14 6 67 WSW l 2 29 23 5 5 65 w l 7 24 24 4 0 60 WNW l 4 15 4 0 2 26 NW 0 3 19 24 l 0 47 NNW l 4 15 3 0 0 23 Variable 0 0 0 0 0 0 0 Total 10 53 172 193 95 89 612 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: 4 Page 45 of 89

Byron Generating Station Period of Record: January - March 2022 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 1 2 1 0 0 0 4 NNE 0 2 0 0 1 0 3 NE 0 5 2 0 0 0 7 ENE 2 2 0 1 0 0 5 E 2 2 1 0 0 0 5 ESE 0 1 2 1 0 0 4 SE 0 2 1 1 3 0 7 SSE 0 0 1 1 9 0 11 s 0 0 2 9 5 3 19 SSW 0 2 s 7 2 0 16 SW 1 2 2 3 0 0 8 WSW 0 1 7 0 0 0 8 w 0 1 8 1 0 0 10 v'JNW 0 4 8 3 0 0 15 NW 0 0 3 4 0 0 7 NNW 0 2 0 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 6 28 43 31 20 3 131 Hours of calm in this stability class: 0 Hours of miss wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 Page 46 of 89

Byron Generating Station Period of Record: January - March 2022 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 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 1 0 0 0 0 1 ENE 1 0 0 0 0 0 1 E 2 0 0 0 0 0 2 ESE 0 1 0 1 0 0 2 SE 0 3 1 1 0 0 5 SSE 1 1 4 4 3 0 13 s 0 2 3 3 5 0 13 SSW 0 1 1 0 0 0 2 SW 1 0 1 0 0 0 2 WSW 0 0 2 0 0 0 2 w 0 1 0 0 0 0 1 WNW 0 0 0 3 0 0 3 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 5 11 13 12 8 0 49 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: 4 Page 47 of89

Byron Generating Station Period of Record: April - June 2022 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 1 0 0 0 1 NNE 0 0 2 0 0 0 2 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 1 0 0 0 1 ESE 0 0 3 0 0 0 3 SE 0 0 0 0 0 0 0 SSE 0 0 0 1 0 0 1 s 0 3 4 2 0 0 9 SSW 0 3 2 1 0 0 6 SW 0 3 2 0 0 0 5 WSW 2 0 1 0 0 0 3 w 1 0 1 0 0 0 2 WNW 0 0 0 2 0 0 2 NW 0 0 0 0 0 0 0 NNW 0 1 1 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 3 10 18 6 0 0 37 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 of89

Byron Generating Station Period of Record: April - June 2022 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 3 0 0 3 NE 0 0 0 1 0 0 1 ENE 0 0 3 1 0 0 4 E 0 0 1 j_ 0 0 0 1 ESE 0 0 1 0 0 0 1 SE 0 0 0 0 0 0 0 SSE 0 0 0 1 0 0 1 s 0 1 j_ 0 1 0 0 2 SSW 0 0 0 0 0 0 0 SW 0 0 3 1 0 0 4 WSW 0 0 0 0 0 0 0 w 0 0 0 0 0 0 0 WNW 0 0 0 2 0 0 2 NW 0 0 4 1 0 0 5 NNW 0 1 0 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 2 13 11 0 0 26 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 of 89

Byron Generating Station Period of Record: April - June 2022 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 1 2 0 0 0 4 NNE 0 0 0 2 0 0 2 NE 1 0 0 0 0 0 1 ENE 0 1 0 1 0 0 2 E 0 3 3 0 0 0 6 ESE 0 1 0 0 0 0 1 SE 0 0 0 0 0 1 1 SSE 0 0 0 0 0 0 0 s 0 1 1 0 0 0 2 SSW 0 4 5 2 0 0 11 SW 0 1 6 1 0 0 8 WSW 0 0 0 0 0 0 0 w 1 0 0 0 0 0 1 WNW 0 1 2 7 0 0 10 NW 0 1 10 1 0 0 12 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 3 14 30 14 0 1 62 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 of89

Byron Generating Station Period of Record: April - June 2022 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 20 13 4 0 0 39 NNE 4 9 11 6 0 0 30 NE 2 7 6 2 0 0 17 ENE 1 13 15 4 0 0 33 E 0 40 53 2 0 0 95 ESE 3 6 11 14 2 0 36 SE 0 6 11 31 16 4 68 SSE 0 1 19 13 17 6 56 s 1 18 24 37 12 0 92 SSW 2 20 34 18 2 0 76 SW 1 16 25 13 1 0 56 WSW 4 18 12 34 9 7 84 w 3 15 26 27 5 0 76 WNW 1 13 41 46 3 0 104 NW 1 20 85 19 1 0 126 NNW 2 17 20 6 0 0 45 Variable 0 0 0 0 0 0 0 Total 27 239 406 276 68 17 1033 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 of89

Byron Generating Station Period of Record: April - June 2022 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 1 25 3 0 0 0 29 NNE 1 7 5 0 0 0 13 NE 2 9 12 1 0 0 24 ENE 1 12 16 6 0 0 35 E 3 40 23 5 0 0 71 ESE 4 14 25 8 5 0 56 SE 1 9 13 22 4 0 49 SSE 2 27 38 16 6 0 89 s 9 22 27 26 6 0 90 SSW 3 19 23 5 0 0 so SW 3 12 23 4 0 0 42 WSW 5 15 18 4 1 0 43

'01 4 13 16 4 4 2 43 WNW 6 21 17 0 0 0 44 NW 2 32 15 0 0 50 NNW 2 10 9 0 0 0 21 Variable 0 0 0 0 0 0 0 Total 49 287 283 102 26 2 749 Hours of calm in this stability class: 2 Hours of missing wind measurement s in this stability class: 0 Hours of missing stability measurement s in all stability classes: 3 Page 52 of89

Byron Generating Station Period of Record: April - June 2022 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 0 9 0 0 0 0 9 NNE 0 1 0 0 0 0 1 NE 6 1 2 0 0 0 9 ENE 1 2 2 0 0 0 5 E 2 9 1 0 0 0 12 ESE 1 8 7 0 0 0 16 SE 0 2 4 0 0 0 6 SSE 4 15 10 0 0 0 29 s 7 21 4 0 0 0 32 SSW 7 9 1 0 0 0 17 SW 6 6 0 0 0 0 12 WSW 1 3 0 0 0 0 4 w 6 3 0 0 0 0 9 WNW 6 3 0 0 0 0 9 NW 11 5 1 0 0 0 17 NNW 2 7 0 0 0 0 9 Variable 0 0 0 0 0 0 0 Total 60 104 32 0 0 0 196 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 of89

Byron Generating Station Period of Record: April - June 2022 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 1 0 0 0 0 4 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 1 1 0 0 0 0 2 E 0 3 0 0 0 0 3 ESE 1 0 6 0 0 0 7 SE 1 8 2 0 0 0 11 SSE 4 2 2 0 0 0 8 s 7 9 1 0 0 0 17 SSW 2 2 0 0 0 0 4 SW 3 0 0 0 0 0 3 WSW 1 0 0 0 0 0 1 w 3 0 0 0 0 0 3 WNW 4 1 0 0 0 0 5 NW 5 0 0 0 0 0 5 NNW 1 1 0 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 36 28 11 0 0 0 75 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 54 of89

Byron Generating Station Period of Record: April - June 2022 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 3 0 0 3 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 1 0 0 1 ESE 0 0 0 1 0 0 1 SE 0 0 0 2 0 0 2 SSE 0 0 0 0 1 0 1 s 0 0 1 2 2 0 5 SSW 0 4 1 3 1 0 9 SW 0 2 2 0 1 0 5 WSW 1 1 1 0 1 0 4 w 0 0 0 1 1 0 2 WNW 1 0 0 0 1 0 2 NW 0 0 0 0 0 0 0 NNW 0 0 1 1 0 0 2 Variable 0 0 0 0 0 0 0 Total 2 7 6 14 8 0 37 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 of89

Byron Generating Station Period of Record: April - June 2022 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 0 0 0 0 NNE 0 0 0 1 3 0 4 NE 0 0 0 0 1 0 1 ENE 0 0 0 1 0 0 1 E 0 0 2 2 0 0 4 ESE 0 0 0 0 0 0 0 SE 0 0 0 1 0 0 1 SSE 0 0 0 0 0 1 1 s 0 0 0 1 1 0 2 SSW 0 0 0 0 0 0 0 SW 0 0 0 3 1 0 4 WSW 0 0 0 0 0 0 0 w 0 0 0 0 0 0 0 WNW 0 0 0 0 2 0 2 NW 0 0 1 3 1 0 5 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 0 4 12 9 1 26 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 of89

Byron Generating Station Period of Record: April - June 2022 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 2 l 0 0 3 NNE 0 1 0 0 1 0 2 NE 1 0 0 0 1 0 2 ENE 0 0 2 0 1 0 3 E 0 0 5 0 0 0 5 ESE 0 0 1 0 0 0 1 SE 0 0 0 0 0 1 1 SSE 0 0 0 0 0 0 0 s 0 0 2 0 0 0 2 SSW 0 0 6 l 2 0 9 SW 0 0 5 4 1 0 10 WSW 0 0 0 0 0 0 0 w 0 0 1 0 0 0 1 WNW 0 1 1 5 5 0 12 NW 0 0 2 8 0 0 10 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 1 2 28 19 11 1 62 Hours of calm ln this stability class: 0 Hours of missing wind measurement s in this stability class: 0 Hours of missing stability measurement s ln all stability classes: 3 Page 57 of 89

Byron Generating Station Period of Record: April - June 2022 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 16 11 6 1 0 36 NNE 2 7 s 13 5 0 32 NE 2 2 6 3 3 0 16 ENE 2 3 11 5 6 0 27 E 0 11 63 29 5 2 110 ESE 1 6 7 6 12 4 36 SE 1 3 1 12 16 28 61 SSE 2 1 8 11 9 24 55 s 1 7 24 22 26 12 92 SSW 1 9 23 29 12 2 76 SW 1 10 13 21 14 6 65 WSW 4 7 16 14 33 12 86 w l 10 13 31 20 2 77 WNW 1 12 24 36 36 0 109 NW 0 8 49 50 6 0 113 NNW 0 7 20 15 0 0 42 Variable 0 0 0 0 0 0 0 Total 21 119 2 94 303 204 92 1033 Hours of calm in this stability class: 0 Hours of missing wind measurement s in this stability class: 0 Hours of missing stability measurement s in all stability classes: 3 Page 58 of 89

Byron Generatin g Station Period of Record: April - June 2022 Stability Class - Slightly Stable - 250Ft-30F t 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 7 5 0 0 17 NNE 0 0 5 23 0 0 28 NE 0 2 10 3 2 0 17 ENE 4 5 10 12 4 1 36 E 0 4 24 36 9 3 76 ESE 2 1 8 14 15 13 53 SE 0 2 5 10 10 19 46 SSE 0 4 5 14 33 12 68 s 0 1 13 34 24 18 90 SSW 0 10 14 27 17 1 69 SW 0 1 10 30 13 0 54 WSW 1 1 9 18 6 4 39 w 0 0 12 18 2 3 35 WNW 0 9 15 18 0 0 42 NW 1 3 22 29 1 0 56 NNW 1 2 13 9 0 0 25 Variable 0 0 0 0 0 0 0 Total 11 48 182 300 136 74 751 Hours of calm in this stability class: 0 Hours of missing wind measureme nts in this stability class: 0 Hours of missing stability measureme nts in all stability classes: 3 Page 59 of89

Byron Generating Station Period of Record: April - June 2022 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 2 3 0 0 6 NNE 1 2 1 5 0 0 9 NE 0 2 3 2 0 0 7 ENE 0 2 1 2 0 0 5 E 0 3 3 2 2 0 10 ESE 0 1 2 4 6 1 14 SE 0 0 0 3 3 1 7 SSE 0 1 0 3 4 0 8 s 2 4 4 9 8 2 29 SSW 0 4 6 16 5 0 31 SW 0 1 7 6 0 0 14 WSW 0 3 4 2 0 0 9 w 0 4 3 4 0 0 11 WNW 0 0 1 3 0 0 4 NW 1 7 8 9 0 0 25 NNW 0 0 5 2 0 0 7 Variable 0 0 0 0 0 0 0 Total 4 35 50 75 28 4 196 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 60 of89

Byron Generating Station Period of Record: April - June 2022 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 2 0 0 2 NNE 0 0 1 3 0 0 4 NE 0 l 1 1 0 0 3 ENE 1 4 0 1 0 0 6 E 1 2 2 0 0 0 5 ESE 0 1 0 0 0 0 1 SE 1 2 3 3 3 0 12 SSE 0 1 4 4 1 0 10 s 0 2 2 3 0 0 7 SSW 0 1 1 1 1 0 4 S'l'J 0 1 4 4 0 0 9 WSW 1 0 2 1 0 0 4 w 0 0 0 0 0 0 0 WNW 0 0 0 3 0 0 3 NW 2 1 0 2 0 0 cc J

NNW 1 0 0 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 7 16 20 28 s 0 76 Hours of calm in this stability class: 0 Hours of missing wind measurement s in this stability class: 0 Hours of missing stability measurement s in all stability classes: 3 Page 61 of 89

Byron Generating Station Period of Record: July - September 2022 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 5 0 0 0 6 NNE 1 2 0 0 0 0 3 NE 1 0 1 0 0 0 2 ENE 0 3 0 0 0 0 3 E 0 2 0 0 0 0 2 ESE 0 0 1 0 0 0 1 SE 0 2 0 0 0 0 2 SSE 0 3 1 0 0 0 4 s 0 4 4 0 0 0 8 SSW 0 4 3 0 0 0 7 SW 0 2 0 0 0 0 2 WSW 0 3 1 0 0 0 4 w 0 0 0 0 0 0 0 WNW 1 0 0 0 0 0 1 NW 0 0 4 0 0 0 4 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 3 26 21 0 0 0 50 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 of89

Byron Generating Station Period of Record: July - September 2022 Stability Class - Moderately Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind ed (in mph) fli/ind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 2 1 0 0 4 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 1 0 0 0 1 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 1 0 0 0 1 s 0 0 2 0 0 0 2 SSW 0 1 1 0 0 0 2 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 3 0 0 3 NNW 0 0 4 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 0 4 11 4 0 0 19 Hours of calm in this stability class: 0 Hours of missing wind measurement s in this stability class: 0 Hours of missing stability measurement s in all stability classes: 3 Page 63 of 89

Byron Generat Station Period of Record: July September 2022 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 0 2 4 0 0 0 6 NNE l 3 0 0 0 0 4 NE 0 0 1 0 0 0 1 ENE 0 1 2 0 0 0 3 E 0 1 1 0 0 0 2 ESE 0 2 0 0 0 0 2 SE 0 2 0 0 0 0 2 SSE 0 2 3 1 0 0 6 s 0 1 9 2 0 0 12 SSW 0 1 10 0 0 0 11 SW 0 l 0 0 0 0 l WSW 0 0 0 0 0 0 0 w 0 1 0 0 0 0 1 WNW 0 1 0 0 0 0 1 NW 0 0 0 2 0 0 2 NNW 0 0 2 l 0 0 3 Variable 0 0 0 0 0 0 0 Total l 18 32 6 0 0 57 Hours of calm in this stability class: 0 Hours of missing wind measurement s in this stability class: 0 Hours of missing stability measurement s in all stability classes: 3 Page 64 of 89

Byron Generating Station Period of Record: July - September 2022 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 10 35 36 0 0 0 81 NNE 7 42 12 0 0 0 61 NE 6 22 12 0 0 0 40 ENE 5 37 10 0 0 0 52 E 8 27 0 0 0 0 35 ESE 1 18 6 0 0 0 25 SE 1 12 13 1 0 0 27 SSE 3 35 23 1 0 0 62 s 2 43 46 7 0 0 98 SSW 2 29 34 0 0 0 65 SW 4 32 10 0 0 0 46 WSW 7 24 11 2 0 0 44 w 6 20 26 6 0 0 58 WNW 2 15 58 7 0 0 82 NW 3 45 36 8 0 0 92 NNW 6 28 20 2 0 0 56 Variable 0 0 0 0 0 0 0 Total 73 4 64 353 34 0 0 924 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 65 of89

Byron Generating Station Period of Record: July - September 2022 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 6 15 4 1 0 0 26 NNE 3 24 3 0 0 0 30 NE 7 12 5 0 0 0 24 ENE 6 14 0 0 0 0 20 E 5 22 0 0 0 0 27 ESE 6 12 2 0 0 0 20 SE 4 24 5 0 0 0 33 SSE 2 47 15 0 0 0 64 s 8 49 36 2 0 0 95 SSW 10 16 23 3 0 0 52 SW 8 13 13 0 0 0 34 WSW 10 7 6 2 0 0 25 w 7 24 10 0 0 0 41 WNW 12 31 16 0 0 0 59 NW 11 20 10 0 0 0 41 NNW 5 18 3 0 0 0 26 Variable 0 0 0 0 0 0 0 Total 110 348 151 8 0 0 617 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 66 of89

Byron Generating Station Period of Record: July - September 2022 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 6 0 0 0 0 8 NNE 5 2 1 0 0 0 8 NE 1 2 0 0 0 0 3 ENE 7 10 0 0 0 0 17 E 5 26 0 0 0 0 31 ESE 4 13 0 0 0 0 17 SE 2 26 1 0 0 0 29 SSE 4 52 5 0 0 0 61 s 14 16 1 0 0 0 31 SSW 10 4 1 0 0 0 15 SW 18 0 1 0 0 0 19 WSW 8 4 0 0 0 0 12

\ti 17 11 0 0 0 0 28 WNW 16 8 0 0 0 0 24 NW 20 8 0 0 0 0 28 NNW 5 9 0 0 0 0 14 Variable 0 0 0 0 0 0 0 Total 138 197 10 0 0 0 345 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: 3 Page 67 of 89

Byron Generating Station Period of Record: July - September 2022 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 1 0 0 0 0 0 1 NNE 1 0 0 0 0 0 1 NE 1 0 0 0 0 0 1 ENE 1 0 0 0 0 0 1 E 5 2 0 0 0 0 7 ESE 6 8 0 0 0 0 14 SE 2 7 3 0 0 0 12 SSE 12 16 0 0 0 0 28 s 9 2 0 0 0 0 11 SSW 11 0 0 0 0 0 11 SW 6 0 0 0 0 0 6 WSliJ 19 0 0 0 0 0 19 w 14 0 0 0 0 0 14 WNW 25 0 0 0 0 0 25 NW 17 1 0 0 0 0 18 NNW 5 0 0 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 135 36 3 0 0 0 174 Hours of calm in this stability class: 15 Hours of missing wind measurement s in this stability class: 0 Hours of missing stability measurement s in all stability classes: 3 Page 68 of 89

Byron Generating Station Period of Record: July - September 2022 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 4 1 0 0 5 NNE 0 0 1 1 0 0 2 NE 1 2 0 0 0 0 3 ENE 0 2 1 2 0 0 5 E 0 0 1 0 0 0 1 ESE 0 0 0 1 0 0 1 SE 0 0 1 0 0 0 1 SSE 0 3 1 0 0 0 4 s 0 0 2 4 1 0 7 SSW 0 1 5 3 0 0 9 SW 0 0 1 1 0 0 2 WSW 0 1 2 1 0 0 4 w 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 1 0 4 0 0 5 NNW 0 0 0 1 0 0 1 Variable 0 0 0 0 0 0 0 Total 1 10 19 19 1 0 50 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 69 of89

Byron Generatin g Station Period of Record: July - September 2022 Stability Class - Moderatel y Unstable - 250Ft-30F t 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 2 1 0 4 NNE 0 0 0 0 1 0 1 NE 0 0 0 0 0 0 0 ENE 0 0 1 0 0 0 1 E 0 0 2 0 0 0 2 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 1 0 0 0 1 s 0 0 0 2 0 0 2 SSW 0 0 0 2 0 0 2 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 2 2 0 4 NNW 0 0 1 1 0 0 2 Variable 0 0 0 0 0 0 0 Total 0 0 6 9 4 0 19 Hours of calm in this stability class: 0 Hours of missing wind measureme nts in this stability class: 0 Hours of missing stability measureme nts in all stability classes: 3 Page 70 of89

Byron Generating Station Period of Record: July - September 2022 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 2 0 0 6 NNE 0 0 3 0 0 0 3 NE 0 0 1 1 0 0 2 ENE 0 0 0 2 0 0 2 E 1 1 1 1 0 0 4 ESE 0 3 0 0 0 0 3 SE 0 0 1 0 0 0 1 SSE 0 1 1 3 1 0 6 s 0 0 6 3 1 0 10 SSW 0 0 5 8 0 0 13 SW 0 0 1 0 0 0 1 WSW 0 0 1 0 0 0 1 w 0 0 0 0 0 0 0 WNW 0 1 0 0 0 0 1 NW 0 0 0 0 2 0 2 NNW 0 0 1 0 1 0 2 Variable 0 0 0 0 0 0 0 Total 1 6 25 20 5 0 57 Hours of calm in this stability class: 0 Hours of missing wind measurement s in this stability class: 0 Hours of missing stability measurement s in all stability classes: 3 Page 71 of 89

Byron Generating Station Period of Record: July - September 2022 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 12 33 19 0 0 65 NNE 1 23 33 12 1 0 70 NE 0 16 24 11 0 0 51 ENE 0 20 28 9 0 0 57 E 6 15 14 1 0 0 36 ESE 2 9 9 3 0 0 23 SE 0 6 12 7 2 0 27 SSE 2 11 29 13 3 0 58 s 1 14 40 31 8 1 95 SSW 3 19 28 24 2 0 76 SW 4 22 17 10 0 0 53 WSW 1 10 18 7 3 0 39 w 4 4 22 14 7 0 51 WNW 0 5 30 39 8 0 82 NW 2 23 32 32 6 0 95 NNW 2 14 15 12 3 0 46 Variable 0 0 0 0 0 0 0 Total 29 223 384 244 43 1 924 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 72 of89

Byron Generating Station Period of Record: July - September 2022 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 6 13 9 0 0 30 NNE 0 5 19 6 1 0 31 NE 1 7 13 18 0 0 39 ENE 2 10 6 2 0 0 20 E 0 5 16 8 1 0 30 ESE 1 5 2 6 2 0 16 SE 1 6 11 7 0 0 25 SSE 0 3 12 29 4 0 48 s 0 3 13 45 21 0 82 SSW 3 4 11 51 10 1 80 SW 3 1 16 14 12 0 46 WSW 0 1 7 8 3 3 22 w 2 3 11 14 4 0 34 WNW 0 5 18 31 0 0 54 NW 0 4 12 26 0 0 42 NNW 0 8 1 9 0 0 18 Variable 0 0 0 0 0 0 0 Total 15 76 181 283 58 4 617 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 73 of89

Byron Generating Station Period of Record: July - September 2022 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 1 2 5 5 0 0 13 NNE 3 2 4 3 0 0 12 NE 1 2 0 1 0 0 4 ENE 2 14 6 4 0 0 26 E 1 7 23 12 1 0 44 ESE 0 3 3 2 2 0 10 SE 0 1 8 8 5 0 22 SSE 0 0 4 14 5 0 23 s 2 0 2 30 15 0 49 SSW 0 5 5 13 3 0 26 SW 0 2 6 4 1 0 13 WSW 0 0 7 5 0 0 12 w 0 2 9 7 0 0 18 WNW 2 2 11 12 0 0 27 NW 0 2 15 21 0 0 38 NNW 0 2 8 2 0 0 12 Variable 0 0 0 0 0 0 0 Total 12 46 116 143 32 0 349 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 74 of89

Byron Generating Station Period of Record: July - September 2022 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 1 3 3 1 0 0 8 NNE 0 3 2 1 0 0 6 NE 1 2 0 0 0 0 3 ENE 1 4 0 0 0 0 5 E 1 0 2 1 0 0 4 ESE 0 1 7 3 3 0 14 SE 1 0 5 12 2 0 20 SSE 0 1 1 3 2 0 7 s 0 3 1 7 4 0 15 SSW 1 1 8 7 1 0 18 SW 2 3 3 1 0 0 9 WSW 1 4 5 1 0 0 11 w 2 12 0 1 0 0 15 WNW 0 12 9 2 0 0 23 NW 1 5 4 2 0 0 12 NNW 1 3 11 0 0 0 15 Variable 0 0 0 0 0 0 0 Total 13 57 61 42 12 0 185 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: 3 Page 75 of89

Byron Generating Station Period of Record: October - December2022 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 l 0 0 0 0 0 l ENE 0 0 1 0 0 0 1 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 1 2 1 0 0 4 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 1 1 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 76 of89

Byron Generating Station Period of Record: October - December2022 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 3 0 0 0 3 NNE 0 0 0 0 0 0 0 NE 0 1 1 0 0 0 2 ENE 0 1 0 0 0 0 1 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 2 0 0 0 2 WSW 0 0 0 0 0 0 0 w 0 1 1 0 0 0 2 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 3 7 0 0 0 10 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 of89

Byron Generating Station Period of Record: October - December2022 Stability Class - Slightly Unstable - 250Ft-30Ft Oelta-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 3 0 0 0 3 NE 1 1 0 0 0 0 2 ENE 0 0 0 0 0 0 0 E 0 1 0 0 0 0 1 ESE 0 2 0 0 0 0 2 SE 0 0 0 1 0 0 1 SSE 0 0 0 2 0 0 2 s 0 0 0 1 0 0 1 SSW 0 0 0 0 0 0 0 SW 0 1 0 0 0 0 1 WSW 0 0 0 1 0 0 1 w 0 0 1 1 0 0 2 WNW 0 1 1 1 0 0 3 NW 0 1 1 0 0 0 2 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 1 7 8 7 0 0 23 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 of89

Byron Generating Station Period of Record: October - December2022 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 l 14 11 l 0 0 27 NNE 0 8 l l 0 0 10 NE 2 8 l 0 0 0 11 ENE 2 11 5 0 0 0 18 E 4 23 16 0 0 0 43 ESE 4 15 8 12 l 0 40 SE 3 21 11 5 0 0 40 SSE 2 9 18 25 8 0 62 s 3 6 32 29 2 0 72 SSW 1 12 21 23 6 0 63 SW 4 20 35 9 0 0 68 WSW 5 11 36 51 2 0 105 w 1 17 47 77 20 2 164 WNW 0 16 52 62 29 0 159 NW 7 23 44 39 0 0 113 NNW 1 11 27 2 0 0 41 Variable 0 0 0 0 0 0 0 Total 40 225 365 336 68 2 1036 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 of89

Byron Generat Station Period of Record: October - December202 2 Stability Class - Sli ly 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 7 20 8 0 0 0 35 NNE 4 8 3 0 0 0 15 NE 4 13 2 0 0 0 19 ENE 5 11 11 0 0 0 27 E 5 26 9 10 0 0 50 ESE 6 11 17 9 8 0 51 SE 1 8 10 1 0 0 20 SSE 3 10 51 34 3 0 101 s 3 12 30 59 2 0 106 SSW 3 19 21 15 0 0 58 SW 5 34 11 10 0 0 60 WSW 2 20 12 5 1 0 40 w 3 27 25 6 3 0 64 WNW 3 11 11 0 2 0 27 NW 5 7 29 2 0 0 43 NNW 5 12 4 1 0 0 22 Variable 0 0 0 0 0 0 0 Total 64 249 254 152 19 0 738 Hours of calm in this stability class: 0 Hours of missing wind measurement s in this stability class: 0 Hours of missing stability measurement s in all stability classes: 0 Page 80 of 89

Byron Generating Station Period of Record: October - December2022 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 4 0 0 0 0 5 NE 2 5 0 0 0 0 7 ENE 2 4 1 0 0 0 7 E 6 20 1 0 0 0 27 ESE 1 14 3 0 0 0 18 SE 2 5 1 0 0 0 8 SSE 3 11 45 4 0 0 63 s 2 12 3 0 0 0 17 SSW 6 10 0 0 0 0 16 SW 8 7 0 0 0 0 15 WSW 5 6 1 0 0 0 12 w 6 5 2 0 0 0 13 WNW 8 2 1 0 0 0 11 NW 6 0 0 0 0 0 6 NNW 1 2 0 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 63 108 58 4 0 0 233 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 of 89

Byron Generating Station Period of Record: October - December202 2 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 1 0 0 0 0 0 1 NE 1 0 0 0 0 0 1 ENE 4 1 0 0 0 0 5 E 3 6 0 0 0 0 9 ESE 4 9 3 0 0 0 16 SE 3 10 1 0 0 0 14 SSE 5 9 12 0 0 0 26 s 14 16 0 0 0 0 30 SSW 11 4 0 0 0 0 15 SW 9 0 0 0 0 0 9 WSW 4 0 0 0 0 0 4 w 9 0 0 0 0 0 9 WNW 7 0 0 0 0 0 7 NW 5 1 0 0 0 0 6 NNW 4 1 0 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 86 57 16 0 0 0 159 Hours of calm in this stability class: 2 Hours of miss wind measurement s in this stability class: 0 Hours of missing stability measurement s in all stability classes: 0 Page 82 of 89

Byron Generating Station Period of Record: October - December2022 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 1 0 1 0 0 0 2 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 1 0 1 w 0 0 1 3 0 0 4 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 1 0 2 3 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 83 of 89

Byron Generating Station Period of Record: October - December2022 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 3 0 0 0 3 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 3 0 0 0 3 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 2 0 0 0 2 WSW 0 0 0 0 0 0 0 w 0 0 1 1 0 0 2 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 9 1 0 0 10 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 of89

Byron Generating Station Period of Record: October - December2022 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 0 0 0 0 0 NNE 0 0 4 0 0 0 4 NE 1 0 1 0 0 0 2 ENE 0 0 0 0 0 0 0 E 0 0 1 0 0 0 1 ESE 0 0 2 0 0 0 2 SE 0 0 0 0 0 1 1 SSE 0 0 0 0 0 2 2 s 0 0 0 0 1 0 1 SSW 0 0 0 0 0 0 0 SW 0 1 0 0 0 0 1 WSW 0 0 0 0 1 0 1 w 0 0 0 1 1 0 2 WNW 0 2 0 1 1 0 4 NW 0 0 1 0 0 0 1 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 1 3 10 2 4 3 23 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 of89

Byron Generating Station Period of Record: October - December202 2 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 6 7 10 0 1 26 NNE 0 6 4 1 1 0 12 NE 0 5 5 0 0 0 10 ENE 1 10 3 2 0 0 16 E 1 10 19 16 1 0 47 ESE 3 8 10 12 7 2 42 SE 3 9 18 1 6 1 38 SSE 1 5 15 10 17 12 60 s 0 3 13 31 20 7 74 SSW 0 7 8 22 19 7 63 SW 2 11 15 30 8 1 67 WSW 1 14 22 33 37 0 107 w 0 3 29 49 55 29 165 WNW 0 6 35 31 46 30 148 NW 2 6 40 34 31 2 115 NNW 0 10 19 14 3 0 46 Variable 0 0 0 0 0 0 0 Total 16 119 262 296 251 92 1036 Hours of calm in this stability class: 0 Hours of missing wind measurement s in this stability class: 0 Hours of missing stability measurement s in all stability classes: 0 Page 86 of 89

Byron Generating Station Period of Record: October - December2022 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 0 6 11 11 0 0 28 NNE 0 5 8 6 1 0 20 NE 1 8 12 4 0 0 25 ENE 1 5 10 3 5 0 24 E 1 5 12 17 9 6 50 ESE 1 9 5 13 14 11 53 SE 0 2 4 8 1 1 16 SSE 1 3 6 12 36 14 72 s 0 1 4 19 70 26 120 SSW 0 3 9 28 24 8 72 SIA/ 0 1 9 23 17 3 53 WSW 0 2 16 25 5 2 50 w 0 2 17 38 5 3 65 1i'JNW 0 2 7 13 2 2 26 NW 1 3 7 27 5 0 43 NNW 1 4 6 10 0 0 21 Variable 0 0 0 0 0 0 0 Total 7 61 143 257 194 76 738 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 of 89

Byron Generating Station Period of Record: October - December202 2 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 1 3 1 1 0 0 6 NNE 0 0 0 0 0 0 0 NE 0 3 5 1 0 0 9 ENE 0 0 6 6 0 0 12 E 0 3 5 3 2 0 13 ESE 0 3 7 12 2 1 25 SE 1 2 4 l 3 0 11 SSE 0 1 7 3 2 0 13 s l 0 2 11 40 5 59 SSW 0 0 4 2 2 0 8 SW 0 0 4 16 l 0 21 WSW 0 3 3 10 0 0 16 w 0 2 3 6 0 0 11 WNW 0 2 6 6 0 0 14 NW 0 2 3 2 0 0 7 NNW 1 4 2 l 0 0 8 Variable 0 0 0 0 0 0 0 Total 4 28 62 Bl 52 6 233 Hours of calm in this stability class: 0 Hours of miss wind measurement s in this stabil class: 0 Hours of missing stability measurement s in all stability classes: 0 Page 88 of 89

Byron Generating Station Period of Record: October - December2022 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 3 1 0 0 0 0 4 NNE 0 0 0 0 0 0 0 NE 1 2 4 0 0 0 7 ENE 2 3 2 0 0 0 7 E 0 0 0 2 0 0 2 ESE 0 0 3 4 2 0 9 SE 0 1 9 13 3 0 26 SSE 0 1 2 6 3 0 12 s 0 0 4 8 10 0 22 SSW 0 0 6 13 4 0 23 SW 0 7 8 8 0 0 23 WSW 1 2 6 1 0 0 10 w 1 0 4 3 0 0 8 WNW 0 1 1 1 0 0 3 NW 1 0 2 0 0 0 3 NNW 1 0 1 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 10 18 52 59 22 0 161 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 of89

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