RA19-029, Annual Radioactive Effluent Release Report

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Annual Radioactive Effluent Release Report
ML19116A075
Person / Time
Site: LaSalle  Constellation icon.png
Issue date: 04/26/2019
From: Trafton W
Exelon Generation Co
To:
Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
References
RA19-029
Download: ML19116A075 (77)
v • d • e


Text

LaSalle County Station Exelon Generation ~ 2601 North 21st Road Marseilles, IL 61341 815-4 15-2000 Telephone www.exeloncorp.com RA19-029 10 CFR 50.36a April 26, 2019 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555 LaSalle County Station, Units 1 and 2 Renewed Facility Operating License Nos. NPF-11 and NPF-18 NRC Docket Nos. 50-373, 50-37 4, and 72-70

Subject:

2018 Annual Radioactive Effluent Release Report Enclosed is the Exelon Generation Company, LLC, 2018 Annual Radioactive Effluent Release Report for LaSalle County Station, submitted in accordance with 10 CFR 50.36a, "Technical specifications on effluents from nuclear power reactors," paragraph (a)(2), and Technical Specifications 5.6.3, "Radioactive Effluent Release Report."

There are no regulatory commitments in this letter. Should you have any questions concerning this report, please contact Mr. Daniel Mearhoff, Regulatory Assurance Manager, at (815) 415-2800.

Respectfully,

!!~.l-:JL Site Vice President LaSalle County Station

Enclosure:

LaSalle County Nuclear Power Station Annual Radiological Effluent Release Report (ARERR) 2018 cc: Regional Administrator - NRC Region Ill NRC Senior Resident Inspector - LaSalle County Station

LASALLE COUNTY NUCLEAR POWER STATION ANNUAL RADIOLOGICAL EFFLUENT RELEASE REPORT (ARERR) 2018 Page 1of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

SUPPLEMENTAL INFORMATION

l. Regulatory Limits
a. Gaseous Effluents l) The air dose due to noble gases released in gaseous effluents, from each reactor unit, from the site shall be limited to the following:

a) During any calendar quarter: Less than or equal to 5 mrad for gamma radiation and less than or equal to IO mrad for beta radiation, and b) During any calendar year: Less than or equal to IO mrad for ganuna radiation and less than or equal to 20 mrad for beta radiation.

2) The dose to an individual from radioiodines and radioactive materials in particulate form, and radionuclides, other than noble gases, with half-lives greater than eight days in gaseous effluents released, from each reactor unit, from the site shall be limited to the following:

a) During any calendar quarter: Less than or equal to 7.5 mRem to any organ, and b) During any calendar year: Less than or equal to 15 mRem to any organ.

b. Liquid Effluents l) The dose or dose commitment to an individual from radioactive materials in liquid effluents released, from each reactor unit, from the site shall be limited:

a) During any calendar quarter: Less than or equal to 1.5 mRem to the total body and to less than or equal to 5 mRem to any organ, and b) During any calendar year: Less than or equal to 3 mRem to the total body and to less than or equal to l 0 mRem to any organ.

c. Total Dose l) The dose or dose commitment to any member of the public, due to releases or radioactivity and radiation, from uranium fuel cycle sources shall be limited to less than or equal to 25 mRem to the body or any organ (except the thyroid, which shall be limited to less than or equal to 75 mRem) over 12 consecutive months.
2. Allowable Concentrations
a. Gaseous Effluents l) The dose rate due to radioactive materials released in gaseous effluents from the site shall be limited to the following:

a) For noble gases: Less than or equal to 500 mRem/year to the total body and less than or equal to 3000 mRem/year to the skin, and b) For all radioiodines and for all radioactive materials in particulate form, and radionuclides, other than noble gases, with half-lives greater than eight days: Less than or equal to 1500 mRem/year to any organ via the inhalation pathway.

Page 2 of76

LASALLE COUNTY NUCLEAR POWER ST ATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

SUPPLEMENTAL INFORMATION

b. Liquid Effluents
1) The concentration of radioactive material released from the site shall be limited to ten (10) times the concentrations specified in 10 CFR Part 20, Appendix B, Table II, Column 2 for radionuclides other than dissolved or entrained noble gases. For dissolved or entrained noble gases, the concentration shall be limited to the following:

Nuclide DWC

(µCi/mL)

Kr-85m 2.00E-04 Kr-85 5.00E-04 Kr-87 4.00E-05 Kr-88 9.00E-05 Xe-13lm 7.00E-04 Xe-133m 5.00E-04 Xe-133 6.00E-04 Xe-135m 2.00E-04 Xe-135 2.00E-04 Ar-41 7.00E-05

3. Average Energy
1) Not applicable - average energy is no longer used to determine dose to the public.
4. Measurements and Approximations of Total Radioactivity
a. Gaseous Effluents I) The Containment Vent and Purge System is sampled by grab sample, which is analyzed for principal gamma emitters and H-3.
2) The Main Vent Stack (Station Vent Stack) is sampled by grab sample, which is analyzed for principal gamma emitters and H-3.
3) Standby Gas Treatment (SBGT) System is sampled by grab sample, which is analyzed for principal gamma emitters.
4) All release types as listed in 4.a.I) and 4.a.2) above are sampled at the Station Vent Stack (SYS)

Wide Range Gas Monitor (WRGM), and those listed in 4.a.3) above are sampled at the Standby Gas Treatment (SBGT) System WRGM whenever there is flow. These effluents are continuously sampled by charcoal cartridge and particulate filter paper, which are analyzed for iodines and principal gamma emitters. Particulate filter papers are composited and analyzed for gross alpha, Fe-55, Sr-89 and Sr-90. Noble gases, gross beta and gamma are continuously monitored by noble gas monitors for the SYS and the SBGT System.

5) The LaSalle County Station estimate of 17.24 Ci/Unit/year ofC-14 (as total C-14 released) is based upon a normalized C-14 production rate of 5.1 Ci/GWt-yr, a gaseous release fraction of 0.99, a reactor power rating of 3546 MWt (per Unit) and equivalent full power operation of 351.5 days (per Unit).
b. Liquid Effluents
1) Batch waste release tanks are sampled each batch for principal gamma emitters, I-131, dissolved and entrained noble gases, H-3, gross alpha, Sr-89, Sr-90 and Fe-55.

Page 3 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

SUPPLEMENTAL INFORMATION

2) Continuous releases are sampled continuously in proportion to the rate of flow of the effluent stream and by grab sample. Samples are analyzed for principal gamma emitters, I-131, dissolved and entrained noble gases, H-3, gross alpha, Sr-89, Sr-90 and Fe-55.
5. Batch Releases
a. Gaseous
1) Number of batch releases: None
2) Total time period for batch releases: NIA
3) Maximum time period for a batch release: NIA
4) Average time period for batch releases: NIA
5) Minimum time period for a batch release: NIA
b. Liquid l) Number of batch releases: None
2) Total time period for batch releases: Min. NIA
3) Maximum time period for a batch release: Min. NIA
4) Average time period for batch releases: Min. NI A
5) Minimum time period for a batch release: Min. NIA
6) Average stream flow during periods of release of effluent into a flowing stream: gpm NI A
6. Abnormal Releases
a. Gaseous l) Number of releases: None
2) Total activity released: NIA
3) Summary ofrelease(s): NIA
b. Liquid l) Number of releases: None
2) Total activity released: NIA
3) Summary ofrelease(s): NIA
7. Process Control Program Page 4 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

SUPPLEMENTAL INFORMATION There were no changes to the Process Control Program processing systems or components. There was no use of a solidification agent (e.g. cement, urea formaldehyde, etc.) during the processing of solid radioactive waste.

8. Effluent Monitoring Instrumentation time clocks and sample anomalies.
a. Time clocks:

There were no effluent monitoring time clocks exceeded during 2018.

b. Sample anomalies:

There were no sampling anomalies affecting the measurement of effluents experienced during 2018.

9. Offsite Dose Calculation Manual (ODCM) Revisions.

There were no revisions to the LaSalle Station ODCM in 2018

10. Independent Spent Fuel Storage Installation (ISFSI).

During the period Aprill, 2018 to April 1, 2019, no radioactive effluents were released from the LaSalle Nuclear Station Independent Spent Fuel Storage Installation (ISFSI). Also, during this period, no new casks were transferred to the outdoor concrete ISFSI storage pad.

Page 5 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

UNIT l AND UNIT 2 DOCKET NUMBERS 50-373 AND 50-374 GASEOUS EFFLUENTS SUMMATION OF ALL RELEASES Est. Total A. Fission & Activation Gases Unit Quarter 1 Quarter 2 Quarter 3 Quarter4 Error%

1. Total Release Ci 1.51E+02 2.40E+02 3.69E+02 2.43E+02 2.50E+01
2. Average release rate for the period µCi/sec 1.94E+01 3.05E+01 4.64E+01 3.06E+01
3. Percent of ODCM limit  % * * *
1. Total lodine-131 Ci 1.23E-02 9.23E-03 1.99E-02 5.98E-03 1.50E+01 I
2. Average release rate for the period µCi/sec 1.58E-03 1.17E-03 2.50E-03 7.52E-04
3. Percent of ODCM limit  % * * *
  • C. Particulates
1. Particulates with half-lives > 8 days Ci 1.11 E-03 1.59E-03 3.46E-03 2.28E-03 3.50E+01 I
2. Average release rate for the period µCi/sec 1.42E-04 2.02E-04 4.35E-04 2.87E-04
3. Percent of ODCM limit  % * * *
1. Total Release Ci 5.75E+OO 6.07E+OO 1.30E+01 1.16E+OO 1.50E+01 I
2. Average release rate for the period µCi/sec 7.39E-01 7.71E-01 1.63E-OO 1.46E-OO
3. Percent of ODCM limit  % * * *
  • E. Gross Alpha
1. Total Release Ci <LLD <LLD <LLD <LLD N/A I
2. Average release rate for the period µCi/sec <LLD <LLD <LLD <LLD
3. Percent of ODCM limit  % * * *
1. Total Release Ci 8.62E+OO 8.62E+OO 8.62E+OO 8.63E+OO
2. Average release rate for the period µCi/sec 1.11E+OO 1.10E+OO 1.09E+OO 1.09E+OO
3. Percent of ODCM limit  % * * * *

"*" This information is contained in the Radiological Impact on Man section of the report.

"<" Indicates activity of sample is less than LLD given in µCi/ml Page 6 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

GASEOUS EFFLUENTS ELEV ATED RELEASE UNIT l AND UNIT 2 Nuclides Released Unit Quarter Continuous Mode Quarter Quarter Quarter I Quarter Quarter Batch Mode Quarter Quarter I

1 2 3 4 1 2 3 4 A. Fission gases

' ~

< ~

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Kr-85m Ci 7.35E+01 8.89E+01 1.05E+02 8.60E+01 NIA NIA NIA NIA Kr-87 Ci <LLD <LLD 3.00E+01 <LLD NIA NIA NIA NIA Kr-88 Ci 5.60E+01 1.02E+02 1.77E+02 1.12E+02 NIA NIA NIA NIA Xe-131m Ci <LLD <LLD <LLD <LLD NIA NIA NIA NIA Xe-133m Ci <LLD <LLD 9.35E-06 <LLD NIA NIA NIA NIA Xe-133 Ci 1.68E+01 4.87E+01 5.14E+01 2.65E+01 NIA NIA NIA NIA Xe-135 Ci 4.29E+OO <LLD 5.57E+OO 1.35E+OO NIA NIA NIA NIA Xe-135m Ci <LLD <LLD <LLD 1.71 E+01 NIA NIA NIA NIA Xe-138 Ci <LLD <LLD <LLD <LLD NIA NIA NIA NIA Ar-41 Ci 3.26E-02 5.57E-03 1.77E-02 <LLD NIA NIA NIA NIA Total for Period Ci 1.51 E+02 2.40E+02 3.69E+02 2.43E+02 NIA NIA NIA NIA B. Iodines 1-131 Ci 1.23E-02 9.23E-03 1.99E-02 5.98E-03 NIA NIA NIA NIA 1-132 Ci 3.07E-02 3.05E-02 6.71E-02 1.74E-02 NIA NIA NIA NIA 1-133 Ci 4.60E-02 4.07E-02 8.68E-02 2.47E-02 NIA NIA NIA NIA 1-134 Ci 3.90E-02 7.63E-03 5.37E-02 <LLD NIA NIA NIA NIA 1-135 Ci 5.32E-02 4.49E-02 9.71E-02 2.26E-02 NIA NIA NIA NIA Total for Period Ci 1.82E-01 1.33E-01 3.25E-01 7.07E-02 NIA NIA NIA NIA Tot. 1-131,1-133,1-135 Ci 1.12E-01 9.48E-02 2.04E-01 5.33E-02 NIA NIA NIA NIA C. Particulates Mn-54 Ci <LLD <LLD <LLD 8.97E-06 NIA NIA NIA NIA Fe-55 Ci <LLD <LLD <LLD <LLD NIA NIA NIA NIA Co-58 Ci <LLD <LLD <LLD 2.33E-04 NIA NIA NIA NIA Fe-59 Ci <LLD <LLD <LLD <LLD NIA NIA NIA NIA Co-60 Ci 2.47E-04 1.64E-04 4.62E-04 9.95E-04 NIA NIA NIA NIA Zn-65 Ci <LLD <LLD <LLD 2.44E-04 NIA NIA NIA NIA Sr-89 Ci <LLD <LLD 1.58E-04 3.74E-05 NIA NIA NIA NIA Sr-90 Ci <LLD <LLD <LLD <LLD NIA NIA NIA NIA Zr-95 Ci <LLD <LLD <LLD <LLD NIA NIA NIA NIA Mo-99 Ci <LLD <LLD <LLD 2.71E-05 NIA NIA NIA NIA Cs-134 Ci <LLD <LLD <LLD <LLD NIA NIA NIA NIA Cs-137 Ci <LLD <LLD <LLD <LLD NIA NIA NIA NIA Ba-140 Ci 3.60E-04 4.76E-04 1.35E-03 3.14E-04 NIA NIA NIA NIA La-140 Ci 5.06E-04 9.47E-04 1.53E-03 4.22E-04 NIA NIA NIA NIA Ce-141 Ci <LLD <LLD <LLD <LLD NIA NIA NIA NIA Ce-144 Ci <LLD <LLD <LLD <LLD NIA NIA NIA NIA Total for Period Ci 1.11 E-03 1.59E-03 3.46E-03 2.28E-03 NIA NIA NIA NIA

H-3 Total for Period Ci I 5.75E+OO I 6.07E+OO I 1.30E+01 I 1.16E+01 I NIA

'I'.,, _,._I I NIA I NIA I NIA I E. Gross Alpha --:f:  ;

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Gross Alpha Total for Ci Period <LLD <LLD <LLD <LLD NIA NIA NIA NIA F. Carbon-14 ., " ,. ..... i *

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- -- ~.*~. ii  ;~i_-.?.;

C-14 Total for Period Ci 8.62E+OO 8.62E+OO 8.62E+OO 8.63E+OO NIA NIA NIA Page 7of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

LIQUID RELEASES UNIT I AND UNIT 2 SUMMATION OF ALL LIQUID RELEASES Est. Total A. Fission & Activation Products Unit Quarter 1 Quarter 2 Quarter 3 Quarter4 Error%

1. Total Release {not including tritium, gases Ci <LLD <LLD <LLD <LLD N/A

& alpha)

2. Average diluted concentration during

µCi/ml <LLD <LLD <LLD <LLD period

3. Percent of applicable limit  % . . . .

B. Tritium

1. Total Release Ci <LLD <LLD <LLD <LLD N/A I
2. Average diluted concentration during

µCi/ml <LLD <LLD <LLD <LLD period

3. Percent of applicable limit  % . . . .

C. Dissolved & Entrained Gases

1. Total Release Ci <LLD <LLD <LLD <LLD N/A I
2. Average diluted concentration during

µCi/ml <LLD <LLD <LLD <LLD period

3. Percent of applicable limit  %

D. Gross Alpha Activity

1. Total Release Ci <LLD <LLD <LLD <LLD N/A I
2. Average release rate for the period
3. Percent of ODCM limit

µCi/ml O/o .

<LLD <LLD

<LLD

<LLD E. Volume of Waste Released {prior to Liters 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO dilution)

F. Volume of Dilution Water Used During Liters O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Period

"*" This information is contained in the Radiological Impact on Man section of the report.

"<"Indicates activity of sample is less than LLD given in µCi/ml Page 8 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

LIQUID RELEASES UNIT 1 AND UNIT 2 I Nuclides Released I I Continuous Mode Batch Mode A. Fission & Quarter Quarter Quarter Quarter Quarter Quarter Quarter Quarter Activation Products Unit 1 2 3 4 1 2 3 4 Mn-54 Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A Fe-55 Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A Co-58 Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A Fe-59 Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A Co-60 Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A Zn-65 Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A Sr-89 Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A Sr-90 Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A Mo-99 Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A 1-131 Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A Cs-134 Ci <LLD <LLD <LLD <LLD NIA N/A N/A NIA Cs-137 Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A Ce-141 Ci <LLD <LLD <LLD <LLD N/A N/A NIA N/A Ce-144 Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A Total for Period Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A I B. H-3 H-3 Total for Period Ci <LLD <LLD <LLD N/A N/A N/A N/

C. Dissolved &

Entrained Gasses Kr-85rn Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A Kr-85 Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A Kr-87 Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A Kr-88 Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A Xe-131rn Ci <LLD <LLD <LLD <LLD N/A N/A NIA N/A Xe-133m Ci <LLD <LLD <LLD <LLD NIA N/A NIA N/A Xe-133 Ci <LLD <LLD <LLD <LLD NIA N/A N/A N/A Xe-135m Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A Xe-135 Ci <LLD <LLD <LLD <LLD N/A N/A N/A NIA Ar-41 Ci <LLD <LLD <LLD <LLD N/A N/A N/A N/A Total for Period Ci <LLD <LLD <LLD <LLD N/A N/A NIA N/A D. Gross Alpha

~w Gross Alpha Total for Ci <LLD <LLD <LLD <LLD A N/A N/A N/A Period Page 9 of76

LASALLE COUNTY NUCLEAR POWER ST ATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS FIRST QUARTER A. Solid Waste Shipped Offsite for Burial or Disposal (Not irradiated fuel) 1 . Types of Waste Total Quantity Total Est. Total Types of Waste (m3) Activity (Ci) Period Error(%)

a. Spent resins, filter sludges, evaporator bottoms, 1.76E+01 4.18E+02 1018 +/-25%

etc.

b. Drv compressible waste, contaminated equip, etc. 9.42E+02 2.71 E-01 1018 +/-25%
c. Irradiated components, control rods, etc. None None 1018 N/A
d. Other (Oil, EHC fluid, sump waste, etc.) None None 1018 N/A
2. Estimate of major nuclide composition (by waste type)

Percent Shipment Abundance Type(s)

Major Nuclide Composition (~1%)

a. Spent resins, filter sludges, evaporator bottoms, etc.

Ni-63 1.02% LSA Fe-55 36.59%

Co-60 60.73%

b. Dry compressible waste, contaminated equip, etc.

Fe-55 14.33% LSA Co-60 83.04%

c. Irradiated components, control rods, etc.

None N/A N/A d . Other (Oil, EHC fluid, sump waste etc.)

None N/A N/A Page 10of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS FIRST QUARTER

3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 15 Hittman Transport Energy Solutions - Bear Creek Facility, Oak Ridge, TN 5 Interstate Ventures Energy Solutions - Bear Creek Facility, Oak Ridge, TN B. Irradiated Fuel Shipments (disposition)

Number of Shipments Mode of Transportation Destination None NIA NIA C. Changes to the Process Control Program There were no changes to the Process Control Program during this period. There was no use of a solidification agent (e.g. cement, urea formaldehyde, etc.) during the processing of solid radioactive waste.

Page 11of76

LASALLE COUNTY NUCLEAR POWER ST ATI ON EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS SECOND QUARTER A. Solid Waste Shipped Offsite for Burial or Disposal (Not irradiated fuel)

1. Types of Waste Total Quantity Total Est. Total Types of Waste (m3) Activity (Ci) Period Error(%)
a. Spent resins, filter sludges, evaporator bottoms, 4.32E+01 1.51+02 2018 +/-25%

etc.

b. Orv compressible waste, contaminated equip, etc. 6.67E+01 2.39E+OO 2018 +/-25%
c. Irradiated components, control rods, etc. None None 2018 N/A
d. Other (Oil, EHC fluid, sump waste, etc.) 6.32E+OO 2.94E-3 2018 N/A
2. Estimate of major nuclide composition (by waste type)

Percent Shipment Abundance Type(s)

Major Nuclide Com position (~1%)

a. Spent resins, filter sludges, evaporator bottoms, etc.

Fe-55 25.65% LSA Co-60 52.80%

Ni-63 1.32%

Cs-137 18.52%

b. Dry compressible waste, contaminated equip, etc.

Fe-55 14.37% LSA Co-60 83.08%

c. Irradiated components, control rods, etc.

None N/A N/A

d. Other (Oil, EHC fluid, sump waste etc.)

Fe-55 14.38% N/A Co-60 83.17%

Page 12of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS SECOND QUARTER

3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 9 Hittman Transport Energy Solutions - Bear Creek Facilitv, Oak Ridae, TN 4 Hittman Transport Energy Solutions, Clive Facility, Tooele Countv, UT B. Irradiated Fuel Shipments (disposition)

Number of Shi ments Mode of Trans ortation Destination None N/A N/A C. Changes to the Process Control Program There were no changes to the Process Control Program during this period. There was no use of a solidification agent (e.g. cement, urea formaldehyde, etc.) during the processing of solid radioactive waste.

Page 13of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS THIRD QUARTER A. Solid Waste Shipped Offsite for Burial or Disposal (Not irradiated fuel)

1. Types of Waste Total Quantity Total Est. Total Types of Waste (m3) Activity (Ci) Period Error(%)
a. Spent resins, filter sludges, evaporator bottoms, 2.14E+01 1.82E+02 3018 +/-25%

etc.

b. Orv compressible waste, contaminated equip, etc. 2.05E+02 1.76E+OO 3018 +/-25%
c. Irradiated components, control rods, etc. 1.24E-01 1.84E+01 3018 N/A
d. Other (Oil, EHC fluid, sump waste, etc.) None None 3018 N/A
2. Estimate of major nuclide composition (by waste type)

Percent Shipment Abundance Type(s)

Major Nuclide Composition (~1%)

a. Spent resins, filter sludges, evaporator bottoms, etc.

Fe-55 21.37% LSA Co-60 74.40%

Ni-63 1.42%

Cs-137 2.35%

b. Dry compressible waste, contaminated equip, etc.

Fe-55 10.52% LSA Co-60 86.88%

c. Irradiated components, control rods, etc.

Mn-54 1.73% LSA Co-60 45.08%

Ni-63 2.11%

Fe-55 50.08%

d. Other (Oil, EHC fluid, sump waste, etc.)

None N/A N/A Page 14of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS THIRD QUARTER

3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 13 Hittman Transport Energy Solutions - Bear Creek Facility, Oak Ridge, TN 1 Hittman Transport Energy Solutions, Clive Facility, Tooele Countv, UT 1 Tri State Motor Transit Energy Solutions - Bear Creek Facility, Oak Ridae, TN 1 Interstate Ventures Energy Solutions - Bear Creek Facility, Oak Ridae, TN 8 . Irradiated Fuel Shipments (disposition)

Number of Shi ments Mode of Trans ortation Destination None N/A N/A C. Changes to the Process Control Program Revision 12 of the Process Control Procedure (RW-AA-100) was implemented on August 9, 2017.

The revision removed references to the Fort Calhoun Nuclear Generating Station and added references to the James A. Fitzpatrick Nuclear Power Plant.

There were no changes to the Process Control Program processing systems or components.

There was no use of a solidification agent (e.g. cement, urea formaldehyde, etc.) during the processing of solid radioactive waste.

Page 15of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS FOURTH QUARTER A. Solid Waste Shipped Offsite for Burial or Disposal (Not irradiated fuel)

1. Types of Waste Total Quantity Total Est. Total Types of Waste (m3) Activity (Ci) Period Error%
a. Spent resins, filter sludges, evaporator bottoms, 2.10E+01 4.96E+02 4018 +/-25%

etc.

b. Orv compressible waste, contaminated equip, etc. None None 4018 N/A
c. Irradiated components, control rods, etc. None None 4018 N/A
d. Other (Oil, EHC fluid, sump waste, etc.) None None 4018 N/A
2. Estimate of major nuclide composition (by waste type)

Percent Shipment Abundance Type(s)

Maior Nuclide Composition (2::1 %)

a. Spent resins, filter sludges, evaporator bottoms, etc.

Fe-55 13.06% LSA Co-60 84.21%

Cs-137 1.63%

b. Dry compressible waste, contaminated equip, etc.

None N/A N/A

c. Irradiated components, control rods, etc.

None N/A N/A

d. Other (Oil, EHC fluid, sump waste, etc.)

None N/A N/A Page 16of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

SOLID WASTE AND IRRADIATED FUEL SHIPMENTS FOURTH QUARTER

3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 7 Hittman Transport Energy Solutions, Bear Creek Facility, Oak Ridge, TN B. Irradiated Fuel Shipments (disposition)

Number of Shi ments Mode of Trans ortation Destination None N/A N/A C. Changes to the Process Control Program There were no changes to the Process Control Program during this period. There was no use of a solidification agent (e.g. cement, urea formaldehyde, etc.) during the processing of solid radioactive waste.

Page 17of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

RADIOLOGICAL IMPACT ON MAN MAXIMUM DOSES RES ULTING FROM GASEOUS RELEASES AND COMPLIANCE STATUS Quarterly 1st %of 2nd %of 3rd %of 4th %of Annual %of Units Infant Rece~tor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit GammaAir 5.00E+OO mRad 1.98E-03 0.040 3.49E-03 0.070 6.34E-03 0.127 3.82E-03 0.076 1.00E+01 0.156 Beta Air 1.00E+01 mRad 9.05E-05 0.001 1.41E-04 0.001 2.96E-04 0.003 1.49E-04 0.001 2.00E+01 0.003 NG Total Body 2.50E+OO mRem 1.32E-03 0.053 2.33E-03 0.093 4.23E-03 0.169 2.55E-03 0.102 5.00E+OO 0.209 NG Skin 7.50E+OO mRem 2.22E-03 0.030 3.92E-03 0.052 7.15E-03 0.095 4.28E-03 0.057 1.50E+01 0.117 NNG Organ 7.50E+OO mRem 6.16E-02 0.821 4.68E-02 0.624 9.89E-02 1.32 3.09E-02 0.411 1.50E+01 1.588 Quarterly 1st %of 2nd %of 3rd %of 4th %of Annual %of Units Child Rece~tor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit Gamma Air 5.00E+OO mRad 1.98E-03 0.040 3.49E-03 0.070 6.34E-03 0.127 3.82E-03 0.076 1.00E+01 0.156 Beta Air 1.00E+01 mRad 9.05E-05 0.001 1.41E-04 0.001 2.96E-04 0.003 1.49E-04 0.001 2.00E+01 0.003 NG Total Body 2.50E+OO mRem 1.32E-03 0.053 2.33E-03 0.093 4.23E-03 0.169 2.SSE-03 0.102 5.00E+OO 0.209 NG Skin 7.SOE+OO mRem 2.22E-03 0.030 3.92E-03 0.052 7.lSE-03 0.095 4.28E-03 0.057 1.50E+01 0.117 NNG Organ 7.50E+OO mRem 2.55E-02 0.340 1.94E-02 0.259 4.lOE-02 0.546 1.29E-02 0.172 1.50E+01 0.659 Quarterly 1st %of 2nd %of 3rd %of 4th %of Annual %of Teenager Units Rece~tor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit GammaAir 5.00E+OO mRad 1.98E-03 0.040 3.49E-03 0.070 6.34E-03 0.127 3.82E-03 0.076 1.00E+01 0.156 Beta Air 1.00E+01 mRad 9.0SE-05 0.001 1.41E-04 0.001 2.96E-04 0.003 1.49E-04 0.001 2.00E+01 0.003 NG Total Body 2.50E+OO mRem 1.32E-03 0.053 2.33E-03 0.093 4.23E-03 0.169 2.SSE-03 0.102 5.00E+OO 0.209 NG Skin 7.SOE+OO mRem 2.22E-03 0.030 3.92E-03 0.052 7.lSE-03 0.095 4.28E-03 0.057 1.50E+01 0.117 NNG Organ 7.SOE+OO mRem 1.29E-02 0.171 9.76E-03 0.130 2.06E-02 0.275 6.SOE-03 0.087 1.50E+01 0.332 Quarterly 1st %of 2nd %of 3rd %of 4th %of Annual %of Units Adult Rece~tor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit Gamma Air 5.00E+OO mRad 1.98E-03 0.040 3.49E-03 0.070 6.34E-03 0.127 3.82E-03 0.076 1.00E+01 0.156 Beta Air 1.00E+01 mRad 9.0SE-05 0.00 1.41E-04 0.001 2.96E-04 0.003 1.49E-04 0.001 2.00E+01 0.003 NG Total Body 2.SOE+OO mRem 1.32E-03 0.053 2.33E-03 0.093 4.23E-03 0.169 2.55E-03 0.102 5.00E+OO 0.209 NG Skin 7.50E+OO mRem 2.22E-03 0.030 3.92E-03 0.052 7.lSE-03 0.095 4.28E-03 0.057 1.50E+01 0.117 NNG Organ 7.50E+OO mRem 8.llE-02 0.108 6.lSE-03 0.082 1.30E-02 0.174 4.12E-03 0.055 1.50E+01 0.696 The LaSalle County Nuclear Power Station maximum expected annual dose from Carbon-14 has been calculated using the maximum gross thermal capacity at full power operation. The resultant bounding doses are based upon site specific assumptions of source term.

Page 18of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

RADIOLOGICAL IMPACT ON MAN MAXIM UM DOSES RES UL TING FROM LIQUID RELEASES AND COMPLIANCE STATUS Infant Quarterly 1st %of 2nd %of 3rd %of 4th %of Annual %of Units Rece~tor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit 10CFR50 Appendix I compliance Total Body 1.50E+OO mRem O.OOE+OO 0.00 O.OOE+OO 0.00 O.OOE+OO 0.00 O.OOE+OO 0.00 3.00E+OO 0.00 Organ 5.00E+OO mRem O.OOE+OO 0.00 O.OOE+OO 0.00 O.OOE+OO 0.00 O.OOE+OO 0.00 1.00E+01 0.00 40CFR141 compliance (nearest public drinking water)

Total Body mRem O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 4.00E+OO 0.00 Organ mRem O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 4.00E+OO 0.00 Child Quarterly 1st %of 2nd %of 3rd %of 4th %of Annual %of Units Rece~tor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit 10CFR50 Appendix I compliance Total Body 1.50E+OO mRem O.OOE+OO 0.00 O.OOE+OO 0.00 O.OOE+OO 0.00 O.OOE+OO 0.00 3.00E+OO 0.00 Organ 5.00E+OO mRem O.OOE+OO 0.00 O.OOE+OO 0.00 O.OOE+OO 0.00 O.OOE+OO 0.00 1.00E+01 0.00 40CFR141 compliance (nearest public drinking water)

Total Body mRem O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 4.00E+OO 0.00 Organ mRem O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 4.00E+OO 0.00 Teenager Quarterly 1st %of 2nd %of 3rd %of 4th %of Annual %of Units Rece~tor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit 10CFRSO Appendix I compliance Total Body 1.50E+OO mRem O.OOE+OO 0.00 O.OOE+OO 0.00 O.OOE+OO 0.00 O.OOE+OO 0.00 3.00E+OO 0.00 Organ 5.00E+OO mRem O.OOE+OO 0.00 O.OOE+OO 0.00 O.OOE+OO 0.00 O.OOE+OO 0.00 1.00E+01 0.00 40CFR141 compliance (nearest public drinking water)

Total Body mRem O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 4.00E+OO 0.00 Organ mRem O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 4.00E+OO 0.00 Adult Quarterly 1st %of 2nd %of 3rd %of 4th %of Annual %of Units Limit Rece~tor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit 10CFR50 Appendix I compliance Total Body 1.SOE+OO mRem O.OOE+OO 0.00 O.OOE+OO 0.00 O.OOE+OO 0.00 O.OOE+OO 0.00 3.00E+OO 0.00 Organ 5.00E+OO mRem O.OOE+OO 0.00 O.OOE+OO 0.00 O.OOE+OO 0.00 O.OOE+OO 0.00 1.00E+01 0.00 40CFR141 compliance (nearest public drinking water)

Total Body mRem O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 4.00E+OO 0.00 Organ mRem O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 4.00E+OO 0.00 Page 19of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

RADIOLOGICAL IMPACT ON MAN MAXIMUM DOSES RESULTING FROM RELEASES AND COMPLIANCE STATUS 1 OCFR20 I 40CFA190 Compliance 1st 2nd 3rd 4th  %

Quarter Quarter Quarter Quarter Annual Annual Annual Dose Dose Dose Dose Dose Limit Limit (mRem) (mRem) (mRem) (mRem) (mRem) (mRem/yr)

Unit 1 40CFR190 Compliance U1 DEX I 6.92E-02 I 9.88E-02 I 1.00E-01 1.01 E-01 I 3.69E-01 25 1.48 10CFR20 Compliance U1 DTot 1.31 E-01 1.46E-01 I 1.99E-01 1.27E-01 I 6.03E-01 100 0.60 40CFR190 Compliance Bone 8.67E-03 7.09E-03 7.27E-03 7.14E-03 3.02E-02 25 0.12 Liver 1.70E-03 1.65E-03 1.84E-03 1.70E-03 6.89E-03 25 0.03 Thyroid 6.16E-02 4.68E-02 9.89E-02 2.44E-02 2.32E-01 75 0.31 Kidney 1.73E-03 1.67E-03 1.89E-03 1.71 E-03 7.00E-03 25 0.03 Lung 1.51 E-03 1.51 E-03 1.54E-03 1.59E-03 6.15E-03 25 0.02 Gl-LLI 1.52E-03 1.51 E-03 1.55E-03 1.61 E-03 6.19E-03 25 0.02 Unit 2 40CFR190 Compliance U2 DEX I 9.70E-02 I 9.65E-02 I 9.31 E-02 I 9.85E-02 I 3.85E-01 25 1.54 10CFR20 Compliance U2 DTot I 9.70E-02 I 9.65E-02 I 9.31 E-02 I 9.85E-02 I I 3.85E-01 100 0.39 40CFR190 Compliance Bone O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 25 0.00 Liver O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 25 0.00 Thyroid O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 75 0.00 Kidney O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 25 0.00 Lung O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 25 0.00 0.00 Gl-LLI O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 25 Page 20of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January - March 2018 Stability Class - Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 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 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 0 0 0 0 0 SSW 0 0 1 1 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 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 1 2 0 0 3 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 Page21 of76

LASALLE COUNTY NUCLEAR POWER ST ATI ON EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January - March 2018 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 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 2 0 0 2 NE 0 0 0 0 0 0 0 ENE 0 0 0 3 4 0 7 E 0 0 0 1 0 0 1 ESE 0 0 0 2 0 0 2 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 1 1 0 2 SW 0 0 0 2 0 0 2 WSW 0 0 0 3 0 0 3 w 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 1 0 1 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 14 6 0 20 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 22of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January - March 2018 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 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 0 0 0 2 0 0 2 NE 0 0 1 0 2 0 3 ENE 0 0 4 2 1 0 7 E 0 0 1 3 0 0 4 ESE 0 0 0 6 0 0 6 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 s 0 1 1 1 0 0 3 SSW 0 0 1 3 2 0 6 SW 0 2 3 2 0 1 8 WSW 0 0 3 4 2 0 9 w 0 1 2 0 0 0 3 WNW 0 0 5 1 1 0 7 NW 0 0 3 1 4 0 8 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 4 27 26 12 1 70 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 23 of76

LASALLE COUNTY NUCLEAR POWER ST ATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DAT A LaSalle County Generating Station Period of Record: January - March 2018 Stability Class - Neutral - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 16 51 28 1 0 97 NNE 0 9 15 8 2 0 34 NE 0 1 7 2 2 0 12 ENE 0 0 11 18 10 0 39 E 0 3 13 15 8 3 42 ESE 1 3 7 9 2 2 24 SE 2 5 9 3 0 0 19 SSE 3 4 2 8 5 0 22 s 1 5 15 12 8 0 41 SSW 1 8 5 13 5 0 32 SW 0 6 14 15 3 1 39 WSW 0 9 16 12 4 1 42 w 0 4 12 22 4 1 43 WNW 1 6 45 58 8 1 119 NW 0 6 22 29 2 0 59 NNW 0 7 47 53 13 0 120 Variable 0 0 0 0 0 0 0 Total 10 92 291 305 77 9 784 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 24of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January - March 2018 Stability Class - Slightly Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 22 7 5 0 0 37 NNE 0 11 10 1 0 0 22 NE 0 4 17 27 0 0 48 ENE 0 2 22 15 1 0 40 E 0 7 22 20 12 2 63 ESE 1 2 11 0 4 3 21 SE 0 3 7 12 0 0 22 SSE 0 6 12 12 4 0 34 s 2 10 8 25 10 0 55 SSW 0 8 9 30 25 4 76 SW 2 8 10 25 12 1 58 WSW 4 6 11 18 8 0 47 w 1 9 33 10 8 4 65 WNW 4 13 39 17 7 2 82 NW 0 12 33 6 0 0 51 NNW 3 15 16 11 2 0 47 Variable 0 0 0 0 0 0 0 Total 20 l38 267 234 93 16 768 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 25 of76

LASALLE COUNTY NUCLEAR POWER ST ATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January - March 2018 Stability Class - Moderately Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 0 0 0 0 2 NNE 0 1 0 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 0 1 4 0 0 0 5 E 0 12 27 5 0 0 44 ESE 0 8 0 0 0 0 8 SE 0 4 5 3 0 0 12 SSE 0 4 8 0 0 0 12 s 0 16 11 11 1 0 39 SSW 1 3 16 18 5 0 43 SW 1 6 11 20 4 0 42 WSW 0 6 13 4 1 0 24 w 2 24 26 0 0 0 52 WNW 3 26 18 0 0 0 47 NW 1 9 8 0 0 0 18 NNW 0 7 2 0 0 0 9 Variable 0 0 0 0 0 0 0 Total 8 129 149 61 11 0 358 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 26 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January - March 2018 Stability Class - Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 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 4 0 0 0 4 ESE 0 4 2 0 0 0 6 SE 0 4 3 0 0 0 7 SSE 1 5 4 1 0 0 11 s 0 5 16 0 0 0 21 SSW 0 4 19 12 0 0 35 SW 0 4 8 5 0 0 17 WSW 0 8 15 1 0 0 24 w 0 5 3 0 0 0 8 WNW 0 8 7 0 0 0 15 NW 0 2 0 0 0 0 2 NNW 0 3 0 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 1 52 81 19 0 0 153 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 27 of76

LASALLE COUNTY NUCLEAR POWER ST ATI ON EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DAT A LaSalle County Generating Station Period of Record: January - March 2018 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 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 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 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 0 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 28 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January - March 2018 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 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 1 0 1 ESE 0 0 0 0 1 0 1 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 1 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 0 1 3 0 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 29 of76

LASALLE COUNTY NUCLEAR POWER STA TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DAT A LaSalle County Generating Station Period of Record: January - March 2018 Stability Class - Slightly Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 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 4 0 5 NE 0 0 0 1 0 0 1 ENE 0 0 0 0 1 3 4 E 0 0 0 8 3 0 11 ESE 0 0 1 2 4 0 7 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 1 1 0 2 SW 0 0 0 0 0 0 0 WSW 0 0 0 1 2 0 3 w 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 1 2 1 4 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 1 15 17 4 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 30 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January - March 2018 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 5 13 47 32 9 106 NNE 0 8 19 23 7 3 60 NE 0 5 2 20 15 10 52 ENE 1 6 8 10 29 10 64 E 0 3 3 12 16 21 55 ESE 0 6 2 9 8 16 41 SE 1 2 7 6 4 2 22 SSE 2 6 3 2 6 3 22 s 4 8 5 12 12 19 60 SSW 0 6 4 14 16 25 65 SW 2 5 8 22 16 7 60 WSW 0 7 7 18 13 10 55 w 0 3 12 20 16 19 70 WNW 0 5 16 50 34 16 121 NW 1 7 14 45 62 23 152 NNW 0 5 3 32 34 12 86 Variable 0 0 0 0 0 0 0 Total 11 87 126 342 320 205 1091 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 37 Hours of missing stability measurements in all stability classes: 3 Page 31 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DAT A LaSalle County Generating Station Period of Record: January - March 2018 Stability Class - Slightly Stable - 37SFt-33Ft Delta-T (F)

Winds Measured at 37S Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 s 4 lS 2 2 28 NNE 0 4 lS 6 0 0 2S NE 1 2 2 6 1 0 12 ENE 1 1 2 6 9 4 23 E 0 4 8 16 19 8 SS ESE 1 3 1 8 4 8 2S SE 3 2 1 9 4 s 24 SSE 1 2 1 9 9 11 33 s 1 3 s 14 14 31 68 SSW 0 3 6 10 13 62 94 SW 2 8 3 7 20 37 77 WSW 2 6 7 6 12 14 47 w 0 3 3 9 14 3 32 WNW 0 3 11 23 lS s S7 NW 1 1 10 14 lS 4 4S NNW 0 3 9 17 18 6 S3 Variable 0 0 0 0 0 0 0 Total 13 S3 88 175 169 200 698 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 32 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January - March 2018 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 3 4 1 9 NNE 0 0 3 3 1 0 7 NE 0 1 0 1 0 0 2 ENE 0 0 0 0 0 0 0 E 0 0 1 3 5 1 10 ESE 1 1 0 3 11 0 16 SE 0 0 0 0 0 0 0 SSE 0 0 2 1 1 0 4 s 0 2 5 8 6 7 28 SSW 0 1 1 8 5 25 40 SW 0 1 0 5 9 15 30 WSW 0 0 5 0 7 5 17 w 0 0 4 7 9 0 20 WNW 0 1 4 9 11 1 26 NW 0 1 3 5 4 1 14 NNW 0 1 3 13 5 0 22 Variable 0 0 0 0 0 0 0 Total 1 9 32 69 78 56 245 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 33 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January - March 2018 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 0 0 1 3 0 5 NNE 0 0 0 0 0 1 1 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 1 0 0 1 2 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 1 0 1 SSE 0 0 0 1 2 1 4 s 0 0 0 1 1 1 3 SSW 0 0 0 3 2 3 8 SW 0 0 0 1 9 1 11 WSW 0 0 0 0 1 0 1 w 0 0 0 0 0 0 0 WNW 0 1 0 2 3 0 6 NW 0 0 0 0 0 0 0 NNW 0 0 0 3 0 0 3 Variable 0 0 0 0 0 0 0 Total 1 1 1 12 22 8 45 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 34 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April - June 2018 Stability Class - Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 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 3 0 0 3 E 0 0 0 0 0 0 0 ESE 0 0 0 1 0 0 1 SE 0 0 2 1 0 0 3 SSE 0 0 0 1 0 0 1 s 0 0 0 2 0 0 2 SSW 0 0 0 8 5 0 13 SW 0 0 0 1 3 4 8 WSW 0 0 0 1 2 0 3 w 0 0 1 0 0 0 1 WNW 0 0 5 2 0 0 7 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 0 10 20 10 4 44 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 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April - June 2018 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 7 0 0 0 7 NNE 0 0 2 0 0 0 2 NE 0 0 3 4 0 0 7 ENE 0 0 2 3 0 0 5 E 0 0 0 2 0 0 2 ESE 0 0 0 0 0 0 0 SE 0 0 0 1 0 0 1 SSE 0 0 4 0 0 0 4 s 0 2 0 0 0 0 2 SSW 0 0 2 1 2 0 5 SW 0 3 2 1 1 0 7 WSW 0 0 4 3 1 1 9 w 0 3 1 2 1 0 7 WNW 0 0 12 5 0 0 17 NW 0 0 3 1 0 0 4 NNW 0 0 1 3 0 0 4 Variable 0 0 0 0 0 0 0 Total 0 8 43 26 5 1 83 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 36 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April - June 2018 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 4 1 0 0 6 NNE 0 3 8 1 0 0 12 NE 0 2 9 4 2 0 17 ENE 0 2 5 6 0 0 13 E 0 1 1 8 0 0 10 ESE 0 1 1 0 0 0 2 SE 0 2 1 2 0 0 5 SSE 0 5 0 1 0 0 6 s 0 3 5 0 0 0 8 SSW 0 3 9 1 1 1 15 SW 0 3 10 1 0 0 14 WSW 0 6 6 5 0 0 17 w 1 3 3 2 0 0 9 WNW 0 1 11 3 0 0 15 NW 0 0 7 1 0 0 8 NNW 0 1 5 4 0 0 10 Variable 0 0 0 0 0 0 0 Total 1 37 85 40 3 1 167 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 37 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DAT A LaSalle County Generating Station Period of Record: April - June 2018 Stability Class - Neutral - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 18 15 0 0 0 35 NNE 1 24 26 6 0 0 57 NE 3 21 48 46 9 0 127 ENE 2 24 55 63 3 0 147 E 1 12 22 5 8 0 48 ESE 2 7 12 3 0 0 24 SE 2 7 9 2 0 0 20 SSE 0 13 14 3 0 0 30 s 3 10 18 5 0 0 36 SSW 2 8 14 4 5 0 33 SW 4 8 11 9 3 0 35 WSW 0 5 13 8 1 0 27 w 3 10 22 10 3 0 48 WNW 3 11 17 34 16 2 83 NW 1 7 16 9 1 0 34 NNW 3 10 27 26 0 0 66 Variable 0 0 0 0 0 0 0 Total 32 195 33 9 233 49 2 850 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 38of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April - June 2018 Stability Class - Slightly Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 2S 4 0 0 0 32 NNE 0 31 13 1 0 0 4S NE 2 11 27 7 2 0 49 ENE 0 8 44 36 9 0 97 E 1 32 SS 8 0 0 96 ESE 2 17 8 0 0 0 27 SE 2 8 11 0 0 0 21 SSE 2 7 7 1 1 0 18 s 4 1 10 7 3 0 2S SSW 2 4 12 lS 7 1 41 SW 1 6 10 s 6 1 29 WSW 1 11 12 6 3 0 33 w 0 14 s 7 2 3 31 WNW 2 17 13 14 4 3 S3 NW 1 13 9 3 0 0 26 NNW 0 10 16 s 0 0 31 Variable 0 0 0 0 0 0 0 Total 23 21S 2S6 llS 37 8 6S4 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 39 of76

LASALLE COUNTY NUCLEAR POWER STA TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DAT A LaSalle County Generating Station Period of Record: April - June 2018 Stability Class - Moderately Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 5 0 0 0 0 7 NNE 0 2 0 0 0 0 2 NE 2 0 1 0 0 0 3 ENE 1 2 0 0 0 0 3 E 0 19 14 0 0 0 33 ESE 0 12 3 0 0 0 15 SE 0 14 1 0 0 0 15 SSE 1 7 5 0 0 0 13 s 0 11 5 5 0 0 21 SSW 1 8 18 6 0 0 33 SW 1 6 11 0 0 0 18 WSW 0 9 8 4 0 0 21 w 1 23 7 0 0 0 31 WNW 0 16 1 1 0 0 18 NW 4 0 0 0 0 0 4 NNW 1 4 0 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 14 138 74 16 0 0 242 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 40of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April - June 2018 Stability Class - Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 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 8 0 0 0 0 8 ESE 1 10 0 0 0 0 11 SE 2 7 1 0 0 0 10 SSE 0 8 8 0 0 0 16 s 1 6 18 0 0 0 25 SSW 0 12 17 1 0 0 30 SW 0 8 4 0 0 0 12 WSW 1 7 6 0 0 0 14 w 1 4 1 0 0 0 6 WNW 1 3 0 0 0 0 4 NW 0 0 1 0 0 0 1 NNW 0 3 0 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 7 76 56 1 0 0 140 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 41of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April - June 2018 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 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 0 0 0 0 SSW 0 0 0 0 0 1 1 SW 0 0 0 0 0 2 2 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 0 0 0 0 Variable 0 0 0 0 0 0 0 Total () 0 0 0 0 3 3 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 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April - June 2018 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 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 1 0 0 1 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 0 1 0 1 SSW 0 0 0 0 8 3 11 SW 0 0 0 0 0 5 5 WSW 0 0 0 0 0 0 0 w 0 0 0 0 0 0 0 WNW 0 0 0 2 1 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 0 0 0 4 10 8 22 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 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DAT A LaSalle County Generating Station Period of Record: April - June 2018 Stability Class - Slightly Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 9 0 0 9 NNE 0 0 2 0 0 0 2 NE 0 0 0 2 2 0 4 ENE 0 0 1 1 3 0 5 E 0 0 0 1 1 0 2 ESE 0 0 0 0 0 0 0 SE 0 0 0 3 1 0 4 SSE 0 1 1 1 1 0 4 s 0 0 1 0 0 0 1 SSW 0 0 1 1 2 0 4 SW 0 0 0 0 0 0 0 WSW 0 0 0 2 3 2 7 w 0 0 0 3 0 2 5 WNW 0 0 2 14 1 0 17 NW 0 0 2 7 0 0 9 NNW 0 0 0 5 0 0 5 Variable 0 0 0 0 0 0 0 Total 0 1 10 49 14 4 78 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 44of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DAT A LaSalle County Generating Station Period of Record: April - June 2018 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 14 13 16 2 0 49 NNE 1 14 31 21 5 2 74 NE 0 11 23 67 43 16 160 ENE 5 17 33 80 78 22 235 E 1 11 21 30 18 7 88 ESE 2 13 11 11 5 2 44 SE 2 7 16 12 1 0 38 SSE 2 12 14 12 4 0 44 s 0 7 15 11 7 0 40 SSW 1 6 18 20 8 9 62 SW 2 8 14 16 9 8 57 WSW 0 4 15 21 9 2 51 w 2 10 15 11 9 4 51 WNW 3 10 24 14 34 31 116 NW 2 5 23 30 26 4 90 NNW 0 10 20 15 16 1 62 Variable 0 0 0 0 0 0 0 Total 27 159 306 387 274 108 1261 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 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April - June 2018 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 6 6 3 0 16 NNE 2 3 7 10 1 0 23 NE 0 3 12 7 4 0 26 ENE 0 4 8 26 20 3 61 E 0 9 15 37 16 0 77 ESE 1 5 14 10 10 0 40 SE 0 1 4 5 3 0 13 SSE 0 5 5 5 1 2 18 s 0 0 5 12 8 10 35 SSW 1 2 4 13 13 25 58 SW 0 1 5 7 9 12 34 WSW 0 3 9 12 5 8 37 w 0 2 12 11 4 4 33 WNW 0 1 9 9 9 7 35 NW 0 3 15 14 3 5 40 NNW 2 3 5 4 7 0 21 Variable 0 0 0 0 0 0 0 Total 6 46 135 188 116 76 567 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 46of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April - June 2018 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 1 3 0 0 0 5 NNE 2 1 4 1 0 0 8 NE 1 3 2 0 0 0 6 ENE 0 1 4 0 0 0 5 E 0 2 5 6 2 0 15 ESE 0 1 7 5 2 0 15 SE 0 0 4 6 0 0 10 SSE 0 0 0 11 3 2 16 s 0 0 3 10 2 3 18 SSW 0 0 0 6 8 6 20 SW 0 0 2 23 5 1 31 WSW 0 0 2 2 7 2 13 w 0 0 5 8 2 0 15 WNW 0 0 5 3 3 0 11 NW 0 0 6 3 0 0 9 NNW 0 3 9 0 0 0 12 Variable 0 0 0 0 0 0 0 Total 4 12 61 84 34 14 209 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 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DAT A LaSalle County Generating Station Period of Record: April - June 2018 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 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 1 2 0 0 3 SE 0 0 0 7 0 0 7 SSE 0 0 0 3 0 0 3 s 0 0 0 0 5 2 7 SSW 0 0 0 1 4 10 15 SW 0 0 0 1 1 1 3 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 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 15 10 13 40 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 48 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July - September 2018 Stability Class - Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 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 0 0 0 0 SSW 0 0 3 2 1 0 6 SW 0 0 6 3 0 0 9 WSW 0 0 7 3 0 0 10 w 0 0 0 0 0 0 0 WNW 0 0 2 1 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 0 0 18 9 1 0 28 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 49 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July - September 2018 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 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 2 0 0 0 2 E 0 0 1 0 0 0 1 ESE 0 0 0 0 0 0 0 SE 0 1 0 0 0 0 1 SSE 0 0 0 0 0 0 0 s 0 0 0 1 0 0 1 SSW 0 1 5 2 0 0 8 SW 0 2 14 6 0 0 22 WSW 0 0 9 0 0 0 9 w 0 2 9 0 0 0 11 WNW 0 0 12 0 0 0 12 NW 0 0 1 0 0 0 1 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 6 53 9 0 0 68 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 50 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July - September 2018 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 3 1 0 0 6 NNE 0 1 0 1 0 0 2 NE 0 0 4 3 0 0 7 ENE 0 1 3 1 0 0 5 E 0 7 4 0 0 0 11 ESE 0 6 1 0 0 0 7 SE 0 3 1 0 0 0 4 SSE 0 3 4 0 0 0 7 s 0 2 2 2 0 0 6 SSW 0 7 5 5 0 0 17 SW 0 5 18 5 0 0 28 WSW 0 2 3 2 0 0 7 w 0 6 6 1 0 0 13 WNW 0 2 8 5 0 0 15 NW 0 4 14 0 0 0 18 NNW 0 1 8 2 0 0 11 Variable 0 0 0 0 0 0 0 Total 0 52 84 28 0 0 164 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 51of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July - September 2018 Stability Class - Neutral - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 28 16 4 0 0 48 NNE 0 24 20 0 0 0 44 NE 1 21 32 34 0 0 88 ENE 2 22 10 6 0 0 40 E 0 28 30 0 0 0 58 ESE 1 20 12 1 0 0 34 SE 2 21 10 1 0 0 34 SSE 1 12 17 6 1 0 37 s 2 21 14 3 3 0 43 SSW 2 13 20 6 0 0 41 SW 2 12 21 9 0 0 44 WSW 2 13 8 9 0 0 32 w 1 14 11 11 4 0 41 WNW 1 13 19 3 1 0 37 NW 0 10 23 11 0 0 44 NNW 0 24 44 21 0 0 89 Variable 0 0 0 0 0 0 0 Total 17 296 307 125 9 0 754 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 52of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July - September 2018 Stability Class - Slightly Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 35 5 0 0 0 42 NNE 1 20 15 0 0 0 36 NE 1 12 20 0 0 0 33 ENE 1 17 37 2 0 0 57 E 2 21 22 0 0 0 45 ESE 3 20 4 1 0 0 28 SE 4 5 6 0 0 0 15 SSE 7 7 8 3 1 0 26 s 1 15 30 6 0 0 52 SSW 1 12 38 12 0 0 63 SW 1 15 8 3 0 0 27 WSW 1 13 4 5 1 0 24 w 2 8 4 0 2 0 16 WNW 1 14 9 0 0 0 24 NW 0 10 11 0 0 0 21 NNW 1 11 11 0 0 0 23 Variable 0 0 0 0 0 0 0 Total 29 235 232 32 4 0 532 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 53of76

LASALLE COUNTY NUCLEAR POWER ST ATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July - September 2018 Stability Class - Moderately Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 11 0 0 0 0 13 NNE 0 1 0 0 0 0 1 NE 4 3 0 0 0 0 7 ENE 3 7 2 0 0 0 12 E 2 40 20 0 0 0 62 ESE 4 32 0 0 0 0 36 SE 3 14 0 0 0 0 17 SSE 3 19 4 0 0 0 26 s 3 22 3 0 0 0 28 SSW 6 17 18 0 0 0 41 SW 1 8 6 0 0 0 15 WSW 4 14 7 0 0 0 25 w 4 13 3 1 0 0 21 WNW 4 28 0 0 0 0 32 NW 3 3 0 0 0 0 6 NNW 3 7 5 0 0 0 15 Variable 0 0 0 0 0 0 0 Total 49 239 68 1 0 0 357 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 54 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July - September 2018 Stability Class - Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 8 0 0 0 0 9 NNE 0 0 0 0 0 0 0 NE 2 0 0 0 0 0 2 ENE 0 2 0 0 0 0 2 E 2 24 5 0 0 0 31 ESE 0 35 0 0 0 0 35 SE 0 25 0 0 0 0 25 SSE 3 28 0 0 0 0 31 s 0 25 6 0 0 0 31 SSW 3 19 7 0 0 0 29 SW 4 26 8 0 0 0 38 WSW 5 14 5 0 0 0 24 w 5 24 0 0 0 0 29 WNW 2 9 0 0 0 0 11 NW 3 0 0 0 0 0 3 NNW 2 3 0 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 32 242 31 0 0 0 305 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 55of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July - September 2018 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 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 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 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 0 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 56 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July - September 2018 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 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 0 0 0 0 SSW 0 0 0 0 0 2 2 SW 0 0 0 1 1 0 2 WSW 0 0 2 6 0 0 8 w 0 0 0 1 0 0 1 WNW 0 0 1 3 1 0 s 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 3 11 2 2 18 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 57 of76

LASALLE COUNTY NUCLEAR POWER ST ATI ON EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July - September 2018 Stability Class - Slightly Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 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 2 2 0 0 4 ESE 0 3 0 0 0 0 3 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 1 6 2 1 10 SW 0 0 6 8 3 0 17 WSW 0 0 5 7 0 0 12 w 0 0 8 1 0 0 9 WNW 0 0 6 3 0 0 9 NW 0 0 1 4 0 0 5 NNW 0 0 0 1 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 3 30 32 5 1 71 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 58of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DAT A LaSalle County Generating Station Period of Record: July - September 2018 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 10 21 14 12 0 57 NNE 0 12 16 18 3 0 49 NE 0 13 16 41 49 5 124 ENE 0 9 10 24 14 2 59 E 1 17 44 14 1 0 77 ESE 1 23 18 1 2 0 45 SE 1 16 16 6 2 0 41 SSE 0 10 21 7 0 1 39 s 4 10 23 14 17 5 73 SSW 0 12 20 18 18 6 74 SW 1 6 27 25 19 2 80 WSW 1 7 15 15 6 0 44 w 0 9 11 4 7 7 38 WNW 1 11 17 15 9 3 56 NW 0 4 34 32 15 0 85 NNW 0 7 29 20 29 0 85 Variable 0 0 0 0 0 0 0 Total 10 176 338 268 203 31 1026 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 59of76

LASALLE COUNTY NUCLEAR POWER STA TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July - September 2018 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 5 1 3 0 11 NNE 2 7 11 20 2 0 42 NE 1 4 11 15 7 0 38 ENE 0 3 31 23 3 0 60 E 1 6 18 28 10 0 63 ESE 3 5 10 13 6 0 37 SE 3 3 9 4 3 0 22 SSE 3 7 11 2 3 2 28 s 2 3 10 17 13 4 49 SSW 1 3 12 11 27 18 72 SW 0 4 5 14 19 3 45 WSW 0 3 15 11 8 3 40 w 0 5 7 7 2 2 23 WNW 1 3 9 13 0 0 26 NW 1 3 9 17 0 0 30 NNW 0 4 4 10 10 0 28 Variable 0 0 0 0 0 0 0 Total 18 65 177 206 116 32 614 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 60of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July - September 2018 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 3 3 3 11 4 24 NNE 0 1 4 5 1 0 11 NE 2 0 0 4 1 0 7 ENE 0 1 0 0 0 0 1 E 0 2 1 10 11 0 24 ESE 0 3 14 17 11 0 45 SE 4 10 7 15 8 0 44 SSE 0 5 12 11 1 0 29 s 0 2 8 17 10 0 37 SSW 0 3 4 17 13 4 41 SW 0 3 14 7 12 2 38 WSW 0 2 10 17 6 0 35 w 0 1 6 8 4 0 19 WNW 0 3 11 8 0 0 22 NW 0 0 10 7 0 0 17 NNW 3 4 4 3 1 0 15 Variable 0 0 0 0 0 0 0 Total 9 43 108 149 90 10 409 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 61of76

LASALLE COUNTY NUCLEAR POWER ST ATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July - September 2018 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 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 4 1 0 5 SSE 1 0 5 8 3 0 17 s 1 0 2 1 5 0 9 SSW 1 1 1 3 1 0 7 SW 0 4 2 5 0 0 11 WSW 0 0 4 0 0 0 4 w 0 0 4 1 0 0 5 WNW 0 1 7 1 0 0 9 NW 0 1 2 0 0 0 3 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 3 7 27 23 10 0 70 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 62 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DAT A LaSalle County Generating Station Period of Record: October - December 2018 Stability Class - Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 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 0 0 0 0 SSW 0 0 0 0 1 0 1 SW 0 0 0 0 2 0 2 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 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 3 0 3 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: 5 Page 63 of76

LASALLE COUNTY NUCLEAR POWER ST ATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October - December 2018 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 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 1 0 0 1 SSE 0 0 0 0 0 0 0 s 0 0 0 0 0 0 0 SSW 0 0 1 1 1 0 3 SW 0 0 2 1 3 0 6 WSW 0 0 0 0 1 0 1 w 0 0 0 0 0 0 0 WNW 0 0 0 1 0 0 1 NW 0 0 0 1 0 0 1 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 3 5 5 0 13 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: 5 Page 64 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October - December 2018 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 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 1 0 0 0 1 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 1 2 0 0 3 SE 0 0 0 2 0 0 2 SSE 0 0 0 0 0 0 0 s 0 0 0 3 0 0 3 SSW 0 0 2 6 0 0 8 SW 0 0 5 3 1 0 9 WSW 0 0 0 1 3 0 4 w 0 0 1 0 0 0 1 WNW 0 0 2 3 2 0 7 NW 0 0 5 2 0 0 7 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 0 19 23 6 0 48 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: 5 Page 65of 76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October - December 2018 Stability Class - Neutral - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 25 28 1 1 0 56 NNE 1 13 18 2 1 0 35 NE 0 13 23 6 3 2 47 ENE 2 4 18 2 0 0 26 E 0 15 12 0 0 0 27 ESE 0 13 8 6 0 0 27 SE 1 5 7 6 2 1 22 SSE 1 4 2 3 4 2 16 s 1 7 17 8 2 0 35 SSW 0 8 14 15 1 0 38 SW 3 14 14 11 0 1 43 WSW 1 9 34 22 6 2 74 w 1 7 48 31 7 3 97 WNW 1 12 40 40 7 2 102 NW 0 9 31 16 1 0 57 NNW 0 22 67 44 9 4 146 Variable 0 0 0 0 0 0 0 Total 13 180 381 213 44 17 848 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: 5 Page 66of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October - December 2018 Stability Class - Slightly Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 28 8 0 3 0 43 NNE 2 16 32 1 4 0 55 NE 0 5 2 0 0 0 7 ENE 1 9 13 7 5 3 38 E 2 17 42 7 3 0 71 ESE 0 11 14 10 8 0 43 SE 1 1 8 2 1 6 19 SSE 2 5 10 15 1 1 34 s 1 8 25 16 6 0 56 SSW 1 8 20 17 0 0 46 SW 3 6 15 33 1 0 58 WSW 2 11 20 29 14 0 76 w 2 21 29 29 12 2 95 WNW 2 14 25 5 5 9 60 NW 2 22 24 2 0 0 50 NNW 2 31 11 16 0 0 60 Variable 0 0 0 0 0 0 0 Total 27 213 298 189 63 21 811 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: 5 Page 67 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DAT A LaSalle County Generating Station Period of Record: October - December 2018 Stability Class - Moderately Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 15 0 0 0 0 15 NNE 0 5 0 0 0 0 s NE 0 0 0 0 0 0 0 ENE 1 0 0 0 0 0 1 E 1 19 13 0 0 0 33 ESE 0 12 9 1 0 0 22 SE 1 14 10 1 0 0 26 SSE 0 4 13 3 0 0 20 s 1 6 24 2 0 0 33 SSW 0 4 22 0 0 0 26 SW 3 2 18 8 0 0 31 WSW 0 10 14 1 0 0 25 w 1 26 31 5 0 0 63 WNW 0 24 4 0 0 0 28 NW 2 3 1 0 0 0 6 NNW 2 9 1 0 0 0 12 Variable 0 0 0 0 0 0 0 Total 12 153 160 21 0 0 346 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: 5 Page 68of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October - December 2018 Stability Class - Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 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 0 0 0 0 1 E 1 12 1 0 0 0 14 ESE 0 12 2 0 0 0 14 SE 2 16 1 0 0 0 19 SSE 1 11 4 0 0 0 16 s 1 6 7 0 0 0 14 SSW 1 9 5 0 0 0 15 SW 0 0 5 0 0 0 5 WSW 4 2 5 0 0 0 11 w 3 7 4 0 0 0 14 WNW 1 5 1 0 0 0 7 NW 0 1 0 0 0 0 1 NNW 1 2 0 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 16 83 35 0 0 0 134 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: 5 Page 69of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October - December 2018 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 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 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 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 0 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 : 5 Page 70 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October - December 2018 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 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 0 0 0 0 SSW 0 0 0 0 0 1 1 SW 0 0 0 0 0 0 0 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 0 1 0 0 1 2 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: 5 Page 71of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October - December 2018 Stability Class - Slightly Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 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 0 0 0 0 SSW 0 0 0 1 1 1 3 SW 0 0 0 0 1 3 4 WSW 0 0 1 0 1 0 2 w 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 1 0 0 1 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 1 2 3 4 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: 5 Page 72 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October - December 2018 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 9 30 29 13 6 87 NNE 0 0 26 32 1 6 65 NE 1 4 19 29 13 6 72 ENE 0 3 14 25 5 6 53 E 0 8 15 9 3 4 39 ESE 2 11 6 11 3 1 34 SE 0 2 6 8 14 8 38 SSE 0 1 3 2 2 8 16 s 0 2 14 13 11 15 55 SSW 1 3 11 15 22 2 54 SW 1 8 25 18 17 6 75 WSW 0 5 22 25 22 20 94 w 0 5 28 39 25 38 135 WNW 1 5 27 57 31 23 144 NW 2 6 36 63 26 13 146 NNW 0 5 15 48 33 13 114 Variable 0 0 0 0 0 0 0 Total 8 77 297 423 241 175 1221 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: 5 Page 73of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October - December 2018 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 3 11 12 2 0 32 NNE 2 7 19 5 0 0 33 NE 0 5 11 14 12 0 42 ENE 0 3 4 2 2 0 11 E 2 8 10 14 15 5 54 ESE 0 5 8 15 15 15 58 SE 0 5 5 9 4 10 33 SSE 1 2 1 6 2 9 21 s 0 1 2 10 16 21 50 SSW 0 3 9 10 31 14 67 SW 0 5 6 11 21 12 55 WSW 0 0 7 7 14 26 54 w 0 3 7 11 22 11 54 WNW 1 1 14 20 14 21 71 NW 0 3 12 16 6 4 41 NNW 0 4 8 17 5 1 35 Variable 0 0 0 0 0 0 0 Total 10 58 134 179 181 149 711 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: 5 Page 74 of76

LASALLE COUNTY NUCLEAR POWER ST ATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October - December 2018 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 5 5 0 2 12 NNE 0 1 5 0 0 0 6 NE 0 1 1 2 1 3 8 ENE 0 1 1 0 0 0 2 E 0 0 2 2 1 0 5 ESE 0 1 4 6 5 0 16 SE 1 4 4 12 7 1 29 SSE 0 1 5 6 7 4 23 s 0 1 3 4 16 11 35 SSW 1 0 6 7 2 3 19 SW 0 2 5 4 13 2 26 WSW 0 3 1 0 1 2 7 w 1 1 0 1 11 1 15 WNW 0 0 3 1 9 5 18 NW 0 1 0 0 1 2 4 NNW 0 1 1 1 2 0 5 Variable 0 0 0 0 0 0 0 Total 3 18 46 51 76 36 230 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: 5 Page 75 of76

LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2018)

METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October - December 2018 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 0 1 0 0 5 NNE 1 0 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 2 0 2 SSE 0 0 2 2 3 0 7 s 0 0 3 0 0 0 3 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 1 0 1 WSW 1 0 0 0 0 0 1 w 0 0 2 1 1 0 4 WNW 1 1 1 0 0 0 3 NW 0 0 0 0 0 0 0 NNW 0 1 0 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 3 6 8 4 7 0 28 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: 5 Page 76of76

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