ML18323A365

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2017 Annual Radioactive Effluent Release Report (Part 1)
ML18323A365
Person / Time
Site: LaSalle  Constellation icon.png
Issue date: 04/27/2018
From:
Exelon Generation Co
To:
Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
Shared Package
ML18323A361 List:
References
RA18-026
Download: ML18323A365 (78)
v • d • e


Text

NRC RA18-026 2017 Annual Radioactive Effluent Release Report Part 1 LASALLE COUNTY NUCLEAR POWER STATION ANNUAL RADIOLOGICAL EFFLUENT RELEASE REPORT (ARERR) 2017 Page I of 77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) SUPPLEMENTAL INFORMATION

1. Regulatory Limits a. Gaseous Effluents
1) 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 10 mrad for beta radiation, and b) During any calendar year: Less than or equal to 10 mrad for gamma 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

1) 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 10 mRem to any organ. c. Total Dose 1) 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
1) 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 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) SUPPLEMENT AL INFORMATION

b. Liquid Effluents
1) The concentration ofradioactive 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 (11Ci/mL)

Kr-85m 2.00E-04 Kr-85 5.00E-04 Kr-87 4.00E-05 Kr-88 9.00E-05 Xe-131m 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
1) 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.l) and 4.a.2) above are sampled at the Station Vent Stack (SVS) 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 SVS and the SBGT System. 5) The LaSalle County Station estimate of 16.90 Ci/Unit/year of C-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 344.5 days (per Unit). b. Liquid Effluents

1) Batch waste release tanks are sampled each batch for principal gamma emitters, 1-131, dissolved and entrained noble gases, H-3, gross alpha, Sr-89, Sr-90 and Fe-55. Page 3 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) SUPPLEMENT AL 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, 1-131, 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 1) 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. NIA 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 1) Number ofreleases

One 2) Total activity released:

2.09E+Ol uCi 3) Summary ofrelease(s):

There was one (1) unplanned release of radioactivity from the site to unrestricted areas during the 2017 reporting period. On 7117117 at I 0:55, it was identified that the Off-Gas Building (OGB) atmosphere had become pressurized due to the failure of the Gas Building Ventilation (VO) exhaust damper OV03 l YA. The OGB atmosphere remained pressurized until 7118117 at 11:08 when the "B" VO train was placed online. During the event, pressurized air from the OGB leaked by the door jambs of exterior doors of the OGB in an unmonitored fashion. Air samples for particulate, iodine, noble gas, and tritium were obtained and analyzed during the event. Since the OGB atmosphere exited the plant via an unmonitored pathway, the radiological release was quantified, and an abnormal release permit was generated.

As a conservative measure, leakage flow was set to the rated Off-Gas Building Ventilation flow of7800 SCFM. An Abnormal Gaseous Release Permit using LaSalle's current off-site dose calculation software (OpenEMS) was prepared. The calculated total activity released during the event was 2.09E+Ol microcuries. The permit calculated the organ dose to the maximally Page 4 of77 LASALLE COUNTY NUCLEAR POWER ST A TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) SUPPLEMENT AL INFORMATION exposed individual as a result of this event to be 4.71E-03 mrem, which is well below the quarterly limit of7.5 mrem and annual limit of 15 mrem. b. Liquid 1) Number of releases:

None 2) Total activity released:

NIA 3) Summary of release(s):

NIA 7. 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 fonnaldehyde, 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 2017. b. Sample anomalies:

There were no sampling anomalies affecting the measurement of effluents experienced during 2017. 9. Offsite Dose Calculation Manual (ODCM) Revisions.

There was one revision to the LaSalle Station ODCM in 2017. Revision 9 included a clarification of the types of radiation expected to be observed from the ISFSI (Independent Spent Fuel Storage Installation) and the radwaste storage facilities.

The revision also incorporated various editorial and grammatical enhancements.

REC 12.2.1. Condition E. (ODCM Page 1-12.2.1-2) was enhanced by adding the note: "Required Action E.2 shall be completed if this Condition is entered." This enhancement places the proper emphasis on the timely restoration (within 30 days) of the inoperable instrument channel (liquid process radiation monitor) without further complicating the APPLICABILITY statement of REC 12.2.1. Clarified the values to be used for the lower limits of detection for gaseous samples with durations less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> by placing "5' prior to "24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />" in the last sentence of note "d." (ODCM Page 1-12.4.1-5).

Removed the remaining shutdown action statements from the ODCM based on current Exelon Fleet guidance.

ODCM REC 12.4.8 will now refer the user directly and "Immediately" to Technical Specification 3.7.6, Main Condenser Offgas, the basis for REC 12.4.8. Page 5 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) SUPPLEMENTAL INFORMATION A copy of the ODCM Change Summary Matrix for revision 9 has been included as Appendix A to this report. Also, a copy of ODCM revision 9 has been included as Appendix B to this report. All changes to revision 9 of the ODCM became effective 12/22/2017.

Each of the above ODCM changes was assessed by a change determination, in accordance with ODCM revision procedures.

The change determinations ensured that the changes will not adversely impact accuracy or reliability of effluent, dose, or set point calculations and will maintain the level of radiological effluent controls established by regulatory requirements.

No adverse impact was identified by the change determinations.

10. Independent Spent Fuel Storage Installation (ISFSI). During the period April 1, 2017 to April 1, 2018, no radioactive effluents were released from the LaSalle Nuclear Station Independent Spent Fuel Storage Installation (ISFSI). Also, during this period, nine (9) casks were transferred to the outdoor concrete ISFSI storage pad. Page 6 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) UNIT 1 AND UNIT 2 DOCKET NUMBERS 50-373 AND 50-374 GASEOUS EFFLUENTS SUMMATION OF ALL RELEASES A. Fission & Activation Gases Unit Quarter 1 Quarter 2 Quarter 3 1. Total Release Ci 6.70E+02 2.68E+02 3.11E+02 2. Average release rate for the period µCi/sec 8.62E+01 3.41E+01 3.91E+01 3. Percent of ODCM limit % * *
  • B. Iodine 1. Total lodine-131 Ci 2.57E-02 5.39E-03 7.24E-03 2. Average release rate for the period µCi/sec 3.30E-03 6.85E-04 9.11 E-04 3. Percent of ODCM limit % * *
  • C. Particulates
1. Particulates with half-lives

> 8 days Ci 3.30E-04 3.42E-04 2.52E-04 2. Average release rate for the period µCi/sec 4.24E-05 4.35E-05 3.18E-05 3. Percent of ODCM limit % * *

  • D. Tritium 1. Total Release Ci 4.94E+OO 5.18E+OO 3.25E+OO 2. Average release rate for the period µCi/sec 6.35E-01 6.59E-01 4.09E-01 3. Percent of ODCM limit % * *
  • E. Gross Alpha 1. Total Release Ci <LLD <LLD <LLD 2. Average release rate for the period µCi/sec <LLD <LLD <LLD 3. Percent of ODCM limit % * *
1. Total Release Ci 8.45E+OO 8.45E+OO 8.45E+OO 2. Average release rate for the period µCi/sec 1.09E+OO 1.08E+OO 1.06E+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 7 of77 Quarter4 Est. Total Error% 3.22E+02 2.50E+01 4.05E+01
  • 4.55E-03 1.50E+01 I 5.73E-04
  • 4.41E-04 3.50E+01 I 5.55E-05
  • 4.16E+OO 1.50E+01 I 5.23E-01 * <LLD N/A I <LLD
  • 8.45E+OO 1.06E+OO
  • Nuclides Released A. Fission gases Kr-85 Kr-85m Kr-87 Kr-88 Xe-131m Xe-133m Xe-133 Xe-135 Xe-135m Xe-138 Ar-41 Total for Period B. Iodines 1-131 1-132 1-133 1-134 1-135 Total for Period Tot.1-131,1-133,1-135 C. Particulates Cr-51 Mn-54 Fe-55 Co-58 Fe-59 Co-60 Zn-65 Sr-89 Sr-90 Zr-95 Mo-99 Aa-110m Cs-134 Cs-137 Ba-140 La-140 Ce-141 Ce-144 Total for Period D. Tritium H-3 Total for Period E. Gross Alpha Gross Alpha Total for Period F. Carbon-14 C-14 Total for Period LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) GASEOUS EFFLUENTS ELEVATED RELEASE UNIT 1ANDUNIT2 Continuous Mode Batch Mode Unit Quarter Quarter Quarter Quarter Quarter Quarter Quarter 1 2 3 4 1 2 3 Ci <LLD <LLD <LLD <LLD N/A N/A N/A Ci 9.22E+01 9.31 E+01 1.09E+02 1.00E+02 N/A N/A N/A Ci <LLD 2.38E+OO 4.67E+OO 5.39E+OO N/A N/A N/A Ci 1.30E+02 1.50E+02 1.73E+02 1.45E+02 N/A N/A N/A Ci <LLD <LLD <LLD <LLD N/A N/A N/A Ci <LLD <LLD <LLD <LLD N/A N/A N/A Ci 2.90E+02 1.81 E+01 2.34E+01 7.11E+01 N/A NIA N/A Ci 1.25E+02 4.43E+OO 1.57E+OO <LLD N/A N/A N/A Ci 3.33E+01 <LLD <LLD <LLD N/A N/A N/A Ci <LLD <LLD <LLD <LLD N/A N/A N/A Ci 4.09E-02 2.50E-02 <LLD <LLD N/A N/A NIA Cl 6.70E+02 2.68E+02 3.11E+02 3.22E+02 N/A N/A N/A Ci 2.57E-02 5.39E-03 7.24E-03 4.55E-03 N/A N/A N/A Ci 3.36E-03 7.22E-03 2.09E-02 6.97E-03 N/A N/A N/A Ci 2.73E-02 1.99E-02 3.25E-02 1.57E-02 N/A N/A N/A Ci <LLD 7.82E-03 2.37E-02 <LLD N/A N/A N/A Ci 1.16E-02 1.35E-02 3.40E-02 1.00E-02 N/A N/A N/A Ci 6.80E-02 5.38E-02 1.18E-01 3.73E-02 N/A N/A N/A Ci 6.46E-02 3.88E-02 7.37E-02 3.03E-02 N/A N/A N/A Ci <LLD <LLD <LLD <LLD N/A N/A N/A Ci 3.64E-08 <LLD <LLD <LLD N/A N/A N/A Ci <LLD <LLD <LLD <LLD N/A N/A N/A Ci <LLD <LLD <LLD <LLD N/A N/A N/A Ci <LLD <LLD <LLD <LLD N/A N/A N/A Ci 9.83E-05 8.47E-05 8.62E-05 1.37E-04 N/A N/A N/A Ci <LLD <LLD <LLD <LLD N/A N/A N/A Ci <LLD 2.45E-04 1.35E-04 1.34E-04 N/A N/A N/A Ci <LLD <LLD <LLD <LLD N/A N/A N/A Ci <LLD <LLD 5.66E-08 <LLD N/A N/A N/A Ci <LLD <LLD <LLD <LLD NIA N/A N/A Ci <LLD <LLD <LLD <LLD N/A N/A N/A Ci <LLD <LLD <LLD <LLD N/A N/A N/A Ci 1.25E-05 <LLD <LLD <LLD N/A N/A N/A Ci 2.19E-04 <LLD 3.07E-05 1.70E-04 N/A N/A N/A Ci 3.72E-04 3.23E-04 6.94E-04 2.75E-04 N/A N/A N/A Ci <LLD 1.25E-05 <LLD <LLD N/A N/A N/A Ci <LLD <LLD <LLD <LLD N/A N/A N/A Ci 7.01E-04 6.65E-04 9.46E-04 7.16E-04 N/A N/A N/A Ci 4.94E+OO 5.18E+OO 3.25E+OO 4.16E+OO N/A N/A N/A Ci I I I I I <LLD <LLD <LLD <LLD N/A N/A N/A I Ci 8.45E+OO 8.45E+OO 8.45E+OO 8.45E+OO N/A N/A N/A Page 8 of77 Quarter 4 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A NIA N/A N/A N/A N/A N/A N/A N/A N/A N/A NIA N/A N/A NIA N/A N/A N/A N/A N/A N/A NIA N/A N/A N/A N/A N/A N/A N/A N/A LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) LIQIBD RELEASES UNIT 1 AND UNIT 2 SUMMATION OF ALL LIQIBD RELEASES A. Fission & Activation Products Unit Quarter 1 Quarter 2 Quarter 3 1. Total Release (not including tritium, gases Ci <LLD <LLD <LLD & alpha) 2. Average diluted concentration during µCi/ml <LLD <LLD <LLD period 3. Percent of applicable limit % * * . B. Tritium 1. Total Release Ci <LLD <LLD <LLD 2. Average diluted concentration during µCi/ml <LLD <LLD <LLD period 3. Percent of applicable limit % * *
  • C. Dissolved

& Entrained Gases 1. Total Release Ci <LLD <LLD <LLD 2. Average diluted concentration during µCi/ml <LLD <LLD <LLD period 3. Percent of applicable limit % . . . D. Gross Alpha Activity 1. Total Release Ci <LLD <LLD <LLD 2. Average release rate for the period µCi/ml <LLD <LLD <LLD 3. Percent of ODCM limit % . *

  • Quarter4 <LLD <LLD . <LLD <LLD * <LLD <LLD * <LLD <LLD
  • E. Volume of Waste Released (prior to dilution)

Liters O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO F. Volume of Dilution Water Used During Period Liters O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO "*" 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 9 of77 Est. Total Error% N/A N/A I N/A I N/A I Nuclides Released A. Fission & Activation Products Unit Mn-54 Ci Fe-55 Ci Co-58 Ci Fe-59 Ci Co-60 Ci Zn-65 Ci Sr-89 Ci Sr-90 Ci Mo-99 Ci 1-131 Ci Cs-134 Ci Cs-137 Ci Ce-141 Ci Ce-144 Cl Total for Period Ci B. H-3 H-3 Total for Period Ci C. Dissolved

& Entrained Gasses Kr-85m Ci Kr-85 Ci Kr-87 Ci Kr-88 Ci Xe-131m Ci Xe-133m Ci Xe-133 Ci Xe-135m Ci Xe-135 Ci Ar-41 Ci Total for Period Ci D. Gross Alpha Gross Alpha Total for Ci Period LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) LIQUID RELEASES UNIT 1 AND UNIT 2 Continuous Mode Batch Mode Quarter Quarter Quarter Quarter Quarter Quarter Quarter 1 2 3 4 1 2 3 <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD NIA N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A <LLD <LLD <LLD <LLD N/A N/A N/A Page 10 of 77 Quarter 4 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) 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 Types of Waste (m3) Activity (Ci) Period a. Spent resins, filter sludges, evaporator bottoms, 3.26E+01 3.50E+01 1017 etc. b. Drv compressible waste, contaminated equip, etc. 1.05E+03 8.44E-01 1017 c. Irradiated components, control rods, etc. None None 1017 d. Other (Oil, EHC fluid, sump waste, etc.) None None 1017 2. Estimate of major nuclide composition (by waste type} Percent Abundance Maior Nuclide Composition

a. Spent resins, filter sludges, evaporator bottoms, etc. C-14 3.29% Fe-55 32.98% Co-60 59.58% b. Dry compressible waste, contaminated equip, etc. Mn-54 1.35% Fe-55 33.97% Co-60 61.80% Zn-65 1.03% c. Irradiated components, control rods, etc. None N/A d. Other (Oil, EHC fluid, sump waste etc.} None N/A Page 11 of77 Est. Total Error(%) +/-25% +/-25% N/A N/A Shipment Type(s} LSA LSA N/A N/A LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) SOLID WASTE AND IRRADIATED FUEL SHIPMENTS FIRST QUARTER 3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 16 Hittman Transport Energy Solutions

-Bear Creek Facilitv, Oak Ridoe, TN 7 Hittman Transport Energy Solutions, Clive Facility, Tooele County, UT B. Irradiated Fuel Shipments (disposition)

Number of Shipments Mode of Transportation Destination None NIA 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 12 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) 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 Types of Waste (m3) Activity (Ci} Period a. Spent resins, filter sludges, evaporator bottoms, 1.83E+01 1.77E+02 2017 etc. b. Orv compressible waste, contaminated equip, etc. 1.46E+02 2.37E+OO 2017 c. Irradiated comoonents, control rods, etc. None None 2017 d. Other (Oil, EHC fluid, sump waste, etc.} None None 2017 2. Estimate of major nuclide composition (by waste type) Percent Abundance Major Nuclide Composition

(;;:::1%}

a. Spent resins, filter sludges, evaporator bottoms, etc. Fe-55 25.94% Co-60 71.47% b. Dry compressible waste, contaminated equip, etc. Mn-54 1.35% Fe-55 34.00% Co-60 61.86% Zn-65 1.03% c. Irradiated components, control rods, etc. None N/A d. Other (Oil, EHC fluid, sump waste etc.) None N/A Page 13of77 Est. Total Error(%) +/-25% +/-25% N/A N/A Shipment Type(s) LSA LSA N/A NIA LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) SOLID WASTE AND IRRADIATED FUEL SHIPMENTS SECOND QUARTER 3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 3 Hittman Transport Energy Solutions

-Bear Creek Facilitv, Oak Ridae, TN 3 Hittman Transport Energy Solutions, Clive Facility, Tooele Countv, UT 1 Hittman Transport Waste Control Specialists, Texas Compact Waste Facility, Andrews Countv, TX 1 Interstate Ventures Waste Control Specialists, Texas Compact Waste Facility, Andrews Countv, TX B. Irradiated Fuel Shipments (disposition)

Number of Shi ments Mode of Trans ortation 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 14 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) 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 Tvpes of Waste (m3) Activitv (Ci) Period a. Spent resins, filter sludges, evaporator bottoms, 3.39E+01 4.38E+02 3017 etc. b. Orv compressible waste, contaminated equip, etc. 1.43E+02 4.67E-01 3017 c. Irradiated components, control rods, etc. None None 3017 d. Other (Oil, EHC fluid, sump waste, etc.) None None 3017 2. Estimate of major nuclide composition (by waste type) Percent Abundance Maior Nuclide Composition

a. Spent resins, filter sludges, evaporator bottoms, etc. Fe-55 22.49% Co-60 73.78% Ni-63 1.84% b. Dry compressible waste, contaminated equip, etc. Fe-55 30.74% Co-60 66.89% c. Irradiated components, control rods, etc. None N/A d. Other (Oil, EHC fluid, sump waste, etc.) None N/A Page 15of77 Est. Total Error(%) +/-25% +/-25% N/A N/A Shipment Type(s) LSA LSA N/A N/A LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) SOLID WASTE AND IRRADIATED FUEL SHIPMENTS THIRD QUARTER 3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 3 Hittman Transport Energy Solutions

-Bear Creek Facilitv, Oak Ridae, TN 5 Hittman Transport Energy Solutions, Clive Facility, Tooele County, UT 1 Hittman Transport Waste Control Specialists, Texas Compact Waste Facility, Andrews Countv, TX 3 Interstate Ventures Waste Control Specialists, Texas Compact Waste Facility, Andrews County, TX 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 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 16 of 77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) 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 Types of Waste (m3) Activity (Ci) a. Spent resins, filter sludges, evaporator bottoms, 2.84E+01 1.77E+03 etc. b. Orv compressible waste, contaminated equip, etc. None None c. Irradiated components, control rods, etc. None None d. Other (Oil, EHC fluid, sump waste, etc.) None None 2. Estimate of major nuclide composition (by waste type) Percent Period 4017 4017 4017 4017 Abundance Major Nuclide Composition

a. Spent resins, filter sludges, evaporator bottoms, etc. Fe-55 24.40% Co-60 72.94% b. Dry compressible waste, contaminated equip, etc. None N/A c. Irradiated components, control rods, etc. None N/A d. Other (Oil, EHC fluid, sump waste, etc.) None N/A Page 17of77 Est. Total Error% +/-25% N/A N/A N/A Shipment Type(s) LSA N/A N/A N/A LASALLE COUNTY NUCLEAR POWER ST A TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) SOLID WASTE AND IRRADIATED FUEL SHIPMENTS FOURTH QUARTER 3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination
  • 3 Hittman Transport Energy Solutions, Bear Creek Facility, Oak Ridge, TN for storage prior to processing at Energy Solution's Erwin Resin Facility, Erwin, TN 1 Hittman Transport Energy Solutions, Erwin Resin Facility, Erwin, TN 3 Hittman Transport Energy Solutions, Clive Facility, Tooele, Countv, UT 2 Interstate Ventures Energy Solutions, Bear Creek Facility, Oak Ridge, TN for storage prior to processing at Energy Solution's Erwin Resin Facility, Erwin, TN 1 Interstate Ventures Energy Solutions, Clive Facility, Tooele, County, 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 18of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) RADIOLOGICAL IMPACT ON MAN MAXIMUM DOSES RESULTING FROM GASEOUS RELEASES AND COMPLIANCE STATUS Quarterly Units 1st %of 2nd o/oof 3rd %of 4th o/oof Annual %of Infant Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit Gamma Air 5.00E+OO mRad 5.llE-03 0.102 5.0BE-03 0.102 5.86E-03 0.117 4.98E-03 0.100 1.00E+01 0.210 Beta Air 1.00E+01 mRad 3.21E-04 0.003 1.82E-04 0.002 2.14E-04 0.002 2.02E-04 0.002 2.00E+01 0.005 NG Total Body 2.50E+OO mRem 3.41E-03 0.136 3.39E-03 0.135 3.91E-03 0.156 3.32E-03 0.133 5.00E+OO 0.280 NG Skin 7.50E+OO mRem 5.78E-03 0.077 5.69E-03 0.076 6.57E-03 0.088 5.58E-03 0.074 1.50E+01 0.157 NNG Organ 7.50E+OO mRem 1.24E-01 1.648 2.77E-02 0.370 3.70E-02 0.494 2.36E-02 0.315 1.50E+01 1.413 Quarterly Units 1st o/oof 2nd o/oof 3rd %of 4th o/oof Annual o/oof Child Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit Gamma Air 5.00E+OO mRad 5.llE-03 0.102 5.0BE-03 0.102 5.86E-03 0.117 4.98E-03 0.100 1.00E+01 0.210 Beta Air 1.00E+01 mRad 3.21E-04 0.003 1.82E-04 0.002 2.14E-04 0.002 2.02E-04 0.002 2.00E+01 0.005 NG Total Body 2.50E+OO mRem 3.41E-03 0.136 3.39E-03 0.135 3.91E-03 0.156 3.32E-03 0.133 5.00E+OO 0.280 NG Skin 7.50E+OO mRem 5.78E-03 0.077 5.69E-03 0.076 6.57E-03 0.088 5.58E-03 0.074 1.50E+01 0.157 NNG Organ 7.50E+OO mRem 5.llE-02 0.681 1.16E-02 0.154 1.54E-02 0.205 9.86E-03 0.131 1.50E+01 0.586 Teenager Quarterly Units 1st %of 2nd o/oof 3rd %of 4th o/oof Annual %of Limit Quarter Limit Limit Quarter Limit Quarter Limit Limit Limit Gamma Air 5.00E+OO mRad 5.llE-03 0.102 5.0BE-03 0.102 5.86E-03 0.117 4.98E-03 0.100 1.00E+01 0.210 Beta Air 1.00E+01 mRad 3.21E-04 0.003 1.82E-04 0.002 2.14E-04 0.002 2.02E-04 0.002 2.00E+01 0.005 NG Total Body 2.50E+OO mRem 3.41E-03 0.136 3.39E-03 0.135 3.91E-03 0.156 3.32E-03 0.133 5.00E+OO 0.280 NG Skin 7.50E+OO mRem 5.78E-03 0.077 5.69E-03 0.076 6.57E-03 0.088 5.SBE-03 0.074 1.50E+01 0.157 NNG Organ 7.50E+OO mRem 2.58E-02 0.344 5.77E-03 0.077 7.71E-03 0.103 4.92E-03 0.066 1.50E+01 0.295 Quarterly Units 1st %of 2nd o/oof 3rd %of 4th o/oof Annual %of Adult Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit Gamma Air 5.00E+OO mRad 5.llE-03 0.102 5.0BE-03 0.102 5.86E-03 0.117 4.98E-03 0.100 1.00E+01 0.210 Beta Air 1.00E+01 mRad 3.21E-04 0.003 1.82E-04 0.002 2.14E-04 0.002 2.02E-04 0.002 2.00E+01 0.005 NG Total Body 2.50E+OO mRem 3.41E-03 0.136 3.39E-03 0.135 3.91E-03 0.156 3.32E-03 0.133 5.00E+OO 0.280 NG Skin 7.50E+OO mRem 5.78E-03 0.077 5.69E-03 0.076 6.57E-03 0.088 5.58E-03 0.074 1.50E+01 0.157 NNG Organ 7.50E+OO mRem 1.63E-02 0.217 3.63E-03 0.048 4.86E-03 0.065 3.09E-03 0.041 1.50E+01 0.186 The LaSalle County Nuclear Power Station maximum expected annual dose from Cartion-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 19of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) RADIOLOGICAL IMPACT ON MAN MAXIMUM DOSES RES UL TING FROM LIQUID RELEASES AND COMPLIANCE STATUS Infant Quarterly Units 1st %of 2nd %of 3rd o/oof 4th %of Annual o/oof Rece[!tor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit 1 OCFR50 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 Units 1st %of 2nd o/oof 3rd o/oof 4th %of Annual o/oof 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 Units 1st %of 2nd %of 3rd %of 4th %of Annual o/oof Rece[!tor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit 1 OCFR50 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 Units 1st %of 2nd %of 3rd %of 4th %of Annual %of Rece[!tor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit 1 OCFR50 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 Page 20 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) RADIOLOGICAL IMPACT ON MAN MAXIMUM DOSES RES UL TING FROM RELEASES AND COMPLIANCE STATUS 1 OCFR20 I 40CFR190 Compliance 1st Quarter Dose (mRem) 2nd Quarter Dose (mRem) 3rd Quarter Dose (mRem) 4th Quarter Dose (mRem) Annual Dose (mRem) Annual Limit (mRem/yr)

% Annual Limit Unit 1 U1 DEX I 9.40E-02 I 9.60E-02 I 1.00E-01 1.02E-01 U1 DTot I 2.1 BE-01 1.24E-01 1.37E-01 1.25E-01 Bone Liver Thyroid Kidney Lung Gl-LLI Unit2 7.15E-03 1.85E-03 1.24E-01 1.91 E-03 1.47E-03 1.48E-03 6.91 E-03 6.93E-03 6.89E-03 1.55E-03 1.58E-03 1.54E-03 2.77E-02 3.70E-02 2.36E-02 1.56E-03 1.60E-03 1.55E-03 1.47E-03 1.47E-03 1.47E-03 1.47E-03 1.47E-03 1.47E-03 U2 DEX I 6.11 E-02 I 9.40E-02 I 9.68E-02 I 9.89E-02 I U2 orot I 6.11 E-02 I 9.40E-02 I 9.68E-02 I 9.89E-02 I Bone Liver Thyroid Kidney Lung Gl-LLI O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Page 21of77 I 3.92E-01 I 6.04E-01 2.79E-02 6.52E-03 2.12E-01 6.62E-03 5.BBE-03 5.90E-03 I 3.51 E-01 I 3.51 E-01 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 40CFR190 Compliance 25 1 OCFR20 Compliance 100 40CFR190 Compliance 25 25 75 25 25 25 40CFR190 Compliance 25 1 OCFR20 Compliance 100 40CFR190 Compliance 25 25 75 25 25 25 1.57 0.60 0.11 0.03 0.28 0.03 0.02 0.02 1.40 0.35 0.00 0.00 0.00 0.00 0.00 0.00 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January -March 2017 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 1 3 0 4 SSE 0 0 1 0 1 0 2 s 0 0 1 0 0 0 1 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 5 5 WSW 0 0 0 0 2 0 2 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 2 1 6 5 14 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 Page 22 of77 LASALLE COUNTY NUCLEAR POWER ST A TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January -March 2017 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 1 0 0 1 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 1 0 0 0 1 ESE 0 0 2 0 1 0 3 SE 0 0 1 2 1 0 4 SSE 0 0 1 2 2 0 5 s 0 1 2 0 0 0 3 SSW 0 0 1 1 1 0 3 SW 0 0 2 0 1 1 4 WSW 0 0 3 1 0 0 4 w 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 5 0 0 5 NNW 0 0 0 2 0 0 2 Variable 0 0 0 0 0 0 0 Total 0 1 13 14 6 1 35 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 Page 23 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January -March 2017 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 2 0 0 2 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 3 1 0 0 4 ESE 0 0 0 0 0 0 0 SE 0 0 0 2 1 0 3 SSE 0 0 0 4 1 0 5 s 0 2 4 0 0 0 6 SSW 0 4 7 3 0 0 14 SW 0 0 1 2 0 0 3 WSW 0 0 1 0 1 0 2 w 0 0 0 3 1 0 4 WNW 0 0 1 7 0 0 8 NW 0 0 4 4 0 0 8 NNW 0 0 0 1 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 6 23 29 4 0 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: 2 Page 24 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January -March 2017 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 13 43 16 0 0 72 NNE 0 20 26 1 0 0 47 NE 1 3 15 15 0 0 34 ENE 1 4 13 15 3 1 37 E 1 9 15 10 1 0 36 ESE 1 10 13 2 1 0 27 SE 2 8 4 5 1 0 20 SSE 0 5 3 14 4 0 26 s 2 7 8 8 16 0 41 SSW 0 5 8 15 10 0 38 SW 0 2 17 12 0 0 31 WSW 1 2 6 4 10 0 23 w 2 9 18 25 10 5 69 WNW 0 10 58 110 21 0 199 NW 1 7 41 38 9 3 99 NNW 0 3 59 37 0 0 99 Variable 0 0 0 0 0 0 0 Total 12 117 347 327 86 9 898 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 38 Hours of missing stability measurements in all stability classes: 2 Page 25 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January -March 2017 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 1 26 11 5 0 0 43 NNE 3 16 14 1 0 0 34 NE 0 0 18 4 0 0 22 ENE 1 5 25 20 9 1 61 E 2 9 39 11 7 0 68 ESE 0 10 15 7 5 0 37 SE 1 5 13 7 0 0 26 SSE 0 2 6 23 7 0 38 s 2 2 11 29 17 8 69 SSW 0 3 6 21 3 5 38 SW 1 4 7 16 1 1 30 WSW 1 4 12 14 4 1 36 w 1 9 27 25 11 9 82 WNW 2 18 32 20 27 7 106 NW 0 11 37 9 2 4 63 NNW 0 5 11 5 0 0 21 Variable 0 0 0 0 0 0 0 Total 15 129 284 217 93 36 774 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: 2 Page 26 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January -March 2017 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 2 0 0 0 4 NNE 0 2 0 0 0 0 2 NE 0 3 0 0 0 0 3 ENE 0 0 1 0 0 0 1 E 0 2 7 0 0 0 9 ESE 0 5 2 0 0 0 7 SE 1 10 7 2 0 0 20 SSE 1 8 8 0 0 0 17 s 0 5 9 1 0 0 15 SSW 1 3 7 3 0 0 14 SW 1 7 12 2 0 0 22 WSW 0 7 6 13 0 0 26 w 0 22 7 2 0 0 31 WNW 1 10 3 2 1 1 18 NW 0 5 2 0 0 0 7 NNW 1 2 0 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 6 93 73 25 1 1 199 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: 2 Page 27of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January -March 2017 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 3 0 0 0 0 4 NNE 0 2 0 0 0 0 2 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 1 5 0 0 0 6 ESE 0 5 1 0 0 0 6 SE 1 l1 l1 0 0 0 23 SSE 0 2 2 0 0 0 4 s 0 3 7 0 0 0 10 SSW 0 6 9 1 0 0 16 SW 0 6 6 6 0 0 18 WSW 0 5 10 5 0 0 20 w 1 13 3 0 0 0 17 WNW 0 4 0 0 0 0 4 NW 0 1 0 0 0 0 1 NNW 0 1 1 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 3 63 55 12 0 0 133 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: 2 Page 28 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January -March 2017 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: 2 Page 29 of77 LASALLE COUNTY NUCLEAR POWER ST A TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January -March 2017 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 0 0 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 0 2 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: 2 Page 30 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January -March 2017 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 1 0 1 SE 0 0 0 0 2 2 4 SSE 0 0 1 3 0 1 5 s 0 0 2 0 0 0 2 SSW 0 0 0 1 0 0 1 SW 0 0 0 0 0 4 4 WSW 0 0 0 0 0 1 1 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 1 0 1 Variable 0 0 0 0 0 0 0 Total 0 0 3 4 5 8 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: 2 Page 31of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January -March 2017 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 2 21 37 18 0 78 NNE 0 3 40 18 11 0 72 NE 0 5 4 19 19 0 47 ENE 1 1 5 21 20 14 62 E 0 4 7 15 10 10 46 ESE 0 7 5 12 12 7 43 SE 0 4 7 10 6 2 29 SSE 1 7 2 9 13 6 38 s 0 7 7 12 9 36 71 SSW 0 2 12 14 7 27 62 SW 0 3 6 24 9 3 45 WSW 0 4 4 12 8 13 41 w 1 6 10 18 36 30 101 WNW 0 3 13 62 83 36 197 NW 1 1 22 79 50 23 176 NNW 0 1 13 39 16 1 70 Variable 0 0 0 0 0 0 0 Total 4 60 178 401 327 208 1178 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 90 Hours of missing stability measurements in all stability classes: 2 Page 32 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January -March 2017 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 9 4 2 0 16 NNE 0 7 4 5 0 0 16 NE 0 4 2 9 1 0 16 ENE 1 6 5 9 1 0 22 E 0 1 7 14 13 0 35 ESE 0 3 6 15 11 4 39 SE 0 1 8 7 7 4 27 SSE 0 1 2 12 19 16 so s 0 1 2 11 7 41 62 SSW 0 1 3 4 12 23 43 SW 0 0 5 11 12 16 44 WSW 0 0 3 8 12 14 37 w 0 2 5 12 17 32 68 WNW 0 2 11 18 11 40 82 NW 0 4 10 23 20 11 68 NNW 0 1 4 7 5 1 18 Variable 0 0 0 0 0 0 0 Total 1 35 86 169 150 202 643 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 21 Hours of missing stability measurements in all stability classes: 2 Page 33 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January -March 2017 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 1 1 1 4 NNE 0 1 3 1 0 0 5 NE 0 1 1 0 0 0 2 ENE 0 0 0 0 0 0 0 E 0 1 0 0 0 0 1 ESE 0 0 0 1 0 0 1 SE 0 2 1 2 3 0 8 SSE 0 0 1 11 3 4 19 s 0 0 2 6 6 4 18 SSW 0 0 6 9 4 3 22 SW 0 0 10 5 4 4 23 WSW 0 4 2 7 0 5 18 w 0 1 2 4 2 1 10 WNW 0 0 1 2 1 0 4 NW 0 0 6 3 0 0 9 NNW 0 0 1 1 0 0 2 Variable 0 0 0 0 0 0 0 Total 0 10 37 53 24 22 146 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: 2 Page 34 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: January -March 2017 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 1 0 1 0 2 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 3 0 0 0 0 3 E 0 0 0 0 0 0 0 ESE 0 2 0 0 0 0 2 SE 0 1 0 0 0 0 1 SSE 0 0 0 8 5 1 14 s 0 0 1 4 1 0 6 SSW 0 0 0 2 1 0 3 SW 0 0 0 2 0 7 9 WSW 0 0 0 1 1 7 9 w 0 0 0 0 5 1 6 WNW 0 0 0 1 0 0 1 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 0 6 4 18 14 16 58 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: 2 Page 35 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April -June 2017 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 1 0 0 1 NNE 0 0 0 0 0 0 0 NE 0 0 2 8 0 0 10 ENE 0 0 0 4 0 0 4 E 0 0 0 1 0 0 1 ESE 0 0 0 0 0 0 0 SE 0 0 1 0 0 0 1 SSE 0 0 0 0 0 0 0 s 0 0 0 6 6 2 14 SSW 0 0 1 5 13 0 19 SW 0 0 1 11 5 0 17 WSW 0 0 1 1 0 0 2 w 0 0 0 8 2 0 10 WNW 0 0 0 7 0 0 7 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 6 53 26 2 87 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 Page 36 of77 LASALLE COUNTY NUCLEAR POWER ST A TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April -June 2017 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 7 0 0 7 NNE 0 0 1 0 0 0 1 NE 0 0 0 6 0 0 6 ENE 0 0 0 2 0 0 2 E 0 0 1 0 0 0 1 ESE 0 0 5 1 0 0 6 SE 0 0 2 5 0 0 7 SSE 0 0 2 0 1 1 4 s 0 0 0 1 4 0 5 SSW 0 0 5 2 2 0 9 SW 0 1 6 8 1 3 19 WSW 0 4 5 8 1 0 18 w 0 1 5 14 2 0 22 WNW 0 0 9 18 1 0 28 NW 0 1 6 2 0 0 9 NNW 0 0 1 2 0 0 3 Variable 0 0 0 0 0 0 0 Total 0 7 48 76 12 4 147 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 Page 37 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April -June 2017 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 9 5 0 0 15 NNE 0 1 3 2 0 0 6 NE 0 0 3 2 0 0 5 ENE 0 0 0 2 0 0 2 E 0 2 2 2 0 0 6 ESE 0 0 7 0 0 0 7 SE 0 3 3 2 0 0 8 SSE 0 4 2 0 1 0 7 s 0 2 5 2 2 1 12 SSW 0 3 4 6 4 0 17 SW 0 4 5 6 3 0 18 WSW 0 3 3 8 1 0 15 w 0 5 8 10 2 0 25 WNW 0 1 12 20 5 0 38 NW 0 2 3 1 0 0 6 NNW 0 0 6 4 0 0 10 Variable 0 0 0 0 0 0 0 Total 0 31 75 72 18 1 197 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 Page 38 of77 LASALLE COUNTY NUCLEAR POWER ST A TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April -June 2017 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 7 13 7 0 0 27 NNE 1 14 23 11 3 0 52 NE 0 8 25 39 13 2 87 ENE 1 13 15 11 11 3 54 E 1 3 15 13 8 0 40 ESE 1 4 12 6 0 0 23 SE 0 4 10 5 0 0 19 SSE 0 8 9 4 1 1 23 s 0 3 7 6 3 3 22 SSW 2 3 11 12 7 0 35 SW 0 5 10 13 11 1 40 WSW 1 8 9 14 12 1 45 w 0 7 26 19 10 0 62 WNW 1 12 20 29 17 0 79 NW 0 11 11 4 1 0 27 NNW 0 8 15 14 12 0 49 Variable 0 0 0 0 0 0 0 Total 8 118 231 207 109 11 684 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 39of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April -June 2017 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 1 24 7 8 3 0 43 NNE 0 23 26 4 0 0 53 NE 1 8 18 8 0 0 35 ENE 1 9 13 11 2 0 36 E 1 22 37 19 2 0 81 ESE 1 4 12 1 1 0 19 SE 0 5 7 1 0 0 13 SSE 2 2 6 5 0 0 15 s 0 2 10 17 3 0 32 SSW 0 5 23 32 5 0 65 SW 1 4 23 22 10 3 63 WSW 0 7 25 9 0 0 41 w 0 7 18 8 5 0 38 WNW 1 6 15 12 9 0 43 NW 0 6 14 3 0 0 23 NNW 1 7 10 3 0 0 21 Variable 0 0 0 0 0 0 0 Total 10 141 264 163 40 3 621 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 40of77 LASALLE COUNTY NUCLEAR POWER ST A TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April -June 2017 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 8 0 0 0 0 8 NE 2 1 1 0 0 0 4 ENE 1 2 1 0 0 0 4 E 4 17 21 0 0 0 42 ESE 3 13 2 0 0 0 18 SE 2 4 1 2 0 0 9 SSE 3 4 3 4 0 0 14 s 3 5 10 12 0 0 30 SSW 1 9 26 3 0 0 39 SW 0 7 14 4 0 0 25 WSW 0 6 20 0 0 0 26 w 0 22 25 1 0 0 48 WNW 1 11 1 0 0 0 13 NW 1 3 0 0 0 0 4 NNW 0 4 2 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 23 121 127 26 0 0 297 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 41of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April -June 2017 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 3 0 0 0 0 4 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 1 5 0 0 0 0 6 ESE 0 13 7 0 0 0 20 SE 1 12 2 0 0 0 15 SSE 0 16 0 0 0 0 16 s 0 8 4 0 0 0 12 SSW 0 3 9 0 0 0 12 SW 0 11 4 0 0 0 15 WSW 0 7 9 0 0 0 16 w 0 11 9 1 0 0 21 WNW 0 7 0 0 0 0 7 NW 1 2 0 0 0 0 3 NNW 0 1 0 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 4 99 44 1 0 0 148 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 Page 42 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April -June 2017 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 2 4 6 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 2 6 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: 3 Page 43of77 LASALLE COUNTY NUCLEAR POWER ST A TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April -June 2017 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 1 0 2 3 ENE 0 0 0 0 3 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 2 2 4 SSW 0 0 0 1 2 4 7 SW 0 0 0 4 3 1 8 WSW 0 0 0 0 0 0 0 w 0 0 0 0 3 0 3 WNW 0 0 0 0 2 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 0 0 6 15 9 30 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 Page 44 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April -June 2017 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 7 0 7 NNE 0 0 0 1 0 0 1 NE 0 0 0 2 7 1 10 ENE 0 1 0 0 2 0 3 E 0 0 0 0 0 0 0 ESE 0 0 0 1 0 0 1 SE 0 0 1 1 1 0 3 SSE 0 0 3 0 0 1 4 s 0 0 0 0 7 5 12 SSW 0 0 2 1 2 9 14 SW 0 0 0 3 6 2 11 WSW 0 0 1 1 2 1 5 w 0 0 2 3 8 3 16 WNW 0 0 2 2 7 0 11 NW 0 0 1 3 1 0 5 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 1 12 18 so 22 103 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 45 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April -June 2017 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 1 11 13 20 10 6 61 NNE 0 10 21 16 10 9 66 NE 0 7 9 36 50 38 140 ENE 0 14 10 17 19 19 79 E 0 6 10 14 17 B 55 ESE 0 1 19 14 5 3 42 SE 0 3 13 15 4 0 35 SSE 1 B B B 3 3 31 s 0 3 5 7 9 14 38 SSW 1 4 3 16 16 19 59 SW 1 7 12 23 17 20 BO WSW 0 12 14 22 28 13 89 w 0 9 10 39 30 14 102 WNW 0 7 18 38 47 29 139 NW 0 2 19 23 13 11 68 NNW 0 2 10 18 14 16 60 Variable 0 0 0 0 0 0 0 Total 4 106 194 326 292 222 1144 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 46 of77 LASALLE COUNTY NUCLEAR POWER ST A TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April -June 2017 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 8 4 1 20 NNE 0 4 9 2 8 0 23 NE 3 3 12 10 14 0 42 ENE 0 3 18 10 2 0 33 E 0 5 10 26 10 3 54 ESE 0 3 12 9 11 1 36 SE 0 1 3 3 6 1 14 SSE 0 0 2 3 5 4 14 s 0 1 2 3 6 26 38 SSW 0 2 5 13 20 42 82 SW 0 4 7 12 39 31 93 WSW 0 2 7 13 19 2 43 w 0 2 11 17 5 6 41 WNW 0 0 3 27 15 5 so NW 0 3 2 4 8 0 17 NNW 2 2 2 6 8 0 20 Variable 0 0 0 0 0 0 0 Total 5 36 111 166 180 122 620 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 Page 47 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April -June 2017 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 2 1 4 1 0 0 8 NNE 2 0 1 3 0 0 6 NE 0 2 0 1 0 0 3 ENE 0 2 1 2 0 0 5 E 0 1 6 6 1 0 14 ESE 0 2 4 4 2 0 12 SE 0 1 4 7 9 3 24 SSE 0 1 3 6 3 0 13 s 0 2 4 9 4 4 23 SSW 0 2 10 6 4 7 29 SW 0 3 5 6 4 3 21 WSW 0 1 2 10 2 0 15 w 0 0 0 8 13 4 25 WNW 0 1 1 11 8 0 21 NW 1 2 7 1 0 0 11 NNW 1 0 8 1 0 0 10 Variable 0 0 0 0 0 0 0 Total 6 21 60 82 50 21 240 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 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: April -June 2017 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 3 3 0 6 SE 0 0 4 0 0 1 5 SSE 0 0 1 4 1 0 6 s 0 0 3 1 1 0 5 SSW 0 0 3 2 2 0 7 SW 0 1 0 0 0 0 1 WSW 0 0 0 0 0 0 0 w 0 0 0 0 1 0 1 WNW 0 2 0 0 1 0 3 NW 1 0 0 0 0 0 1 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 1 3 12 10 9 1 36 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 of77 LASALLE COUNTY NUCLEAR POWER ST A TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July -September 2017 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 2 0 0 0 2 ENE 0 0 3 4 0 0 7 E 0 0 1 s 0 0 6 ESE 0 0 3 0 0 0 3 SE 0 0 1 0 0 0 1 SSE 0 1 1 0 0 0 2 s 0 3 7 1 0 0 11 SSW 0 1 13 1 0 0 15 SW 0 1 2 4 1 0 8 WSW 0 1 11 2 3 0 17 w 0 1 8 7 0 0 16 WNW 0 1 9 10 0 0 20 NW 0 0 s 2 0 0 7 NNW 0 0 0 2 0 0 2 Variable 0 0 0 0 0 0 0 Total 0 9 67 38 4 0 118 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 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July -September 2017 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 9 1 0 0 10 NNE 0 0 4 0 0 0 4 NE 0 0 6 0 0 0 6 ENE 0 0 3 0 0 0 3 E 0 1 6 0 0 0 7 ESE 0 2 4 1 0 0 7 SE 0 3 4 0 0 0 7 SSE 0 4 1 0 0 0 s s 0 6 6 1 0 0 13 SSW 0 6 10 0 0 0 16 SW 0 4 7 1 1 0 13 WSW 0 9 7 0 0 0 16 w 0 7 7 1 0 0 15 WNW 0 6 10 8 0 0 24 NW 0 3 4 3 0 0 10 NNW 0 0 4 1 0 0 s Variable 0 0 0 0 0 0 0 Total 0 51 92 17 1 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 51of77 LASALLE COUNTY NUCLEAR POWER ST A TION E FFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July -September 2017 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 0 0 0 5 NNE 0 1 9 0 0 0 10 NE 0 4 4 0 0 0 8 ENE 0 5 6 0 0 0 11 E 1 9 3 0 0 0 13 ESE 0 4 5 0 0 0 9 SE 0 6 4 0 0 0 10 SSE 0 6 5 0 0 0 11 s 0 9 3 1 0 0 13 SSW 0 4 2 0 0 0 6 SW 1 7 2 2 0 0 12 WSW 0 5 5 5 0 0 15 w 1 13 3 2 0 0 19 WNW 0 9 8 3 0 0 20 NW 0 6 5 2 0 0 13 NNW 0 5 19 1 0 0 25 Variable 0 0 0 0 0 0 0 Total 3 95 86 16 0 0 200 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 52 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July -September 2017 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 4 15 12 0 0 0 31 NNE 1 32 21 2 0 0 56 NE 5 17 19 0 0 0 41 ENE 2 19 16 14 0 0 51 E 3 23 7 0 0 0 33 ESE 3 18 7 0 0 0 28 SE 1 14 6 0 0 0 21 SSE 5 12 7 3 0 0 27 s 2 12 3 1 0 0 18 SSW 2 9 15 0 0 0 26 SW 3 12 12 4 0 0 31 WSW 3 12 11 3 0 0 29 w 1 9 15 12 0 0 37 WNW 1 9 19 9 0 0 38 NW 1 11 19 3 0 0 34 NNW 2 11 33 7 0 0 53 Variable 0 0 0 0 0 0 0 Total 39 235 222 58 0 0 554 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 53 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July -September 2017 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 20 9 0 0 0 31 NNE 3 34 5 0 0 0 42 NE 2 15 18 0 0 0 35 ENE 2 6 19 3 0 0 30 E 0 32 27 0 0 0 59 ESE 4 14 0 0 0 0 18 SE 3 12 3 0 0 0 18 SSE 4 12 4 0 0 0 20 s 5 8 8 0 0 0 21 SSW 4 8 9 3 0 0 24 SW 2 12 10 4 0 0 28 WSW 2 8 26 3 1 0 40 w 1 15 21 2 0 0 39 WNW 2 14 7 0 0 0 23 NW 5 17 11 1 0 0 34 NNW 3 13 4 1 0 0 21 Variable 0 0 0 0 0 0 0 Total 44 240 181 17 1 0 483 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 54of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July -September 2017 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 21 0 0 0 0 23 NNE 0 17 0 0 0 0 17 NE 1 1 0 0 0 0 2 ENE 1 2 0 0 0 0 3 E 0 33 16 0 0 0 49 ESE 3 24 0 0 0 0 27 SE 2 13 0 0 0 0 15 SSE 2 15 0 0 0 0 17 s 3 13 7 0 0 0 23 SSW 2 14 4 0 0 0 20 SW 2 16 4 1 0 0 23 WSW 1 13 13 0 0 0 27 w 2 14 5 0 0 0 21 WNW 11 23 6 0 0 0 40 NW 3 8 0 0 0 0 11 NNW 6 5 0 0 0 0 11 Variable 0 0 0 0 0 0 0 Total 41 232 55 1 0 0 329 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 55 of77 LASALLE COUNTY NUCLEAR POWER ST A TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July -September 2017 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 3 0 0 0 0 3 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 1 0 0 0 0 0 1 E 1 23 5 0 0 0 29 ESE 1 25 0 0 0 0 26 SE 5 56 1 0 0 0 62 SSE 2 36 1 0 0 0 39 s 1 48 1 0 0 0 50 SSW 1 37 8 0 0 0 46 SW 2 18 10 0 0 0 30 WSW 1 10 13 0 0 0 24 w 1 27 4 0 0 0 32 WNW 2 17 0 0 0 0 19 NW 0 2 0 0 0 0 2 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 1 8 302 43 0 0 0 363 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 of77 LASALLE COUNTY NUCLEAR POWER ST A TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July -September 2017 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 57 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July -September 2017 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 1 0 0 1 ENE 0 0 0 0 0 0 0 E 0 0 0 2 0 0 2 ESE 0 0 1 0 0 0 1 SE 0 0 0 1 0 0 1 SSE 0 0 0 0 0 0 0 s 0 0 1 2 0 0 3 SSW 0 0 0 5 0 0 5 SW 0 0 0 0 1 0 1 WSW 0 0 1 0 0 0 1 w 0 0 0 1 0 0 1 WNW 0 0 0 2 1 0 3 NW 0 0 1 0 1 0 2 NNW 0 0 0 0 1 0 1 Variable 0 0 0 0 0 0 0 Total 0 0 4 14 4 0 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: 0 Page 58of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July -September 2017 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 3 7 0 0 10 NNE 0 0 0 2 0 0 2 NE 0 0 0 6 0 0 6 ENE 0 0 0 6 2 0 8 E 0 0 2 4 0 0 6 ESE 0 1 3 1 0 0 5 SE 0 1 5 1 0 0 7 SSE 0 0 3 0 0 0 3 s 0 1 8 1 2 0 12 SSW 0 1 9 6 0 0 16 SW 0 1 0 5 0 1 7 WSW 0 0 8 3 4 1 16 w 0 1 1 14 3 0 19 WNW 0 0 9 8 2 0 19 NW 0 0 1 12 4 0 17 NNW 0 0 0 2 2 0 4 variable 0 0 0 0 0 0 0 Total 0 6 52 78 19 2 157 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 59 of77 LASALLE COUNTY NUCLEAR POWER ST A TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July -September 2017 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 1 9 12 11 3 0 36 NNE 0 17 17 22 3 0 59 NE 0 12 15 28 4 0 59 ENE 2 11 26 27 15 0 81 E 3 19 22 5 1 0 so ESE 1 18 15 1 0 0 35 SE 2 17 16 6 0 0 41 SSE 0 11 14 2 3 0 30 s 3 14 25 4 3 0 49 SSW 2 16 12 13 5 0 48 SW 4 15 16 13 5 2 55 WSW 0 15 20 13 4 0 52 w 0 28 11 14 9 1 63 WNW 2 18 14 27 10 2 73 NW 0 15 18 37 10 1 81 NNW 0 7 27 27 4 0 65 Variable 0 0 0 0 0 0 0 Total 20 242 280 250 79 6 877 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 60 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July -September 2017 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 3 11 3 1 20 NNE 1 9 7 18 5 0 40 NE 2 9 14 25 16 0 66 ENE 0 2 18 29 8 0 57 E 0 8 18 20 12 0 58 ESE 0 3 9 14 1 0 27 SE 3 7 15 10 0 0 35 SSE 1 6 8 6 2 0 23 s 1 6 6 9 6 0 28 SSW 1 4 7 4 7 3 26 SW 2 6 11 13 11 6 49 WSW 2 5 7 10 20 3 47 w 0 5 4 25 11 0 45 WNW 0 4 10 7 4 1 26 NW 1 8 12 16 6 5 48 NNW 2 4 10 10 2 0 28 Variable 0 0 0 0 0 0 0 Total 16 88 159 227 114 19 623 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 61of77 LASALLE COUNTY NUCLEAR POWER ST A TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July -September 2017 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 2 1 8 0 0 11 NNE 3 3 0 1 0 0 7 NE 0 4 7 3 2 0 16 ENE 0 3 2 2 0 0 7 E 0 2 4 1 4 0 11 ESE 0 2 14 12 10 0 38 SE 0 4 12 17 8 0 41 SSE 0 1 14 11 8 0 34 s 1 4 11 18 15 1 so SSW 0 2 10 17 4 0 33 SW 0 2 7 10 9 2 30 WSW 0 5 9 16 4 0 34 w 0 6 12 8 8 0 34 WNW 0 2 7 10 3 0 22 NW 1 1 7 16 2 1 28 NNW 0 0 6 2 5 0 13 Variable 0 0 0 0 0 0 0 Total 5 43 123 152 82 4 409 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 62 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: July -September 2017 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 0 0 0 1 NNE 0 1 0 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 1 0 1 SE 0 0 2 6 5 0 13 SSE 0 0 3 16 7 0 26 s 0 0 3 9 3 1 16 SSW 0 2 6 14 4 0 26 SW 0 0 1 13 3 3 20 WSW 0 1 2 3 0 0 6 w 0 0 1 0 0 0 1 WNW 0 1 3 0 0 0 4 NW 0 2 1 0 0 0 3 NNW 0 1 1 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 1 8 23 61 23 4 120 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 63 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October -December 2017 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 1 2 0 0 3 s 0 0 5 6 0 0 11 SSW 0 0 0 4 0 0 4 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 6 12 2 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: 2 Page 64 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October -December 2017 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 1 0 0 0 1 SE 0 0 1 0 0 0 1 SSE 0 0 2 2 1 0 5 s 0 0 3 0 0 0 3 SSW 0 2 4 3 0 0 9 SW 0 0 0 2 0 0 2 WSW 0 0 1 1 0 0 2 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 2 12 8 1 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: 2 Page 65of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October -December 2017 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 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 1 3 0 0 4 ENE 0 0 1 0 0 0 1 E 0 0 1 0 0 0 1 ESE 0 0 0 0 0 0 0 SE 0 0 1 1 0 0 2 SSE 0 1 1 3 0 0 5 s 0 1 1 4 0 0 6 SSW 0 1 2 0 1 0 4 SW 0 0 2 2 0 0 4 WSW 0 0 1 7 0 0 8 w 0 0 6 0 0 0 6 WNW 0 0 1 4 0 0 5 NW 0 0 1 2 0 0 3 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 3 19 26 1 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: 2 Page 66 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October -December 2017 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 27 41 0 1 0 69 NNE 0 11 23 0 0 0 34 NE 0 9 24 6 1 0 40 ENE 0 4 19 8 0 0 31 E 0 4 9 1 0 0 14 ESE 0 8 11 6 0 0 25 SE 1 12 13 9 0 0 35 SSE 1 5 19 6 7 0 38 s 0 7 18 12 4 1 42 SSW 1 3 14 11 10 4 43 SW 1 13 16 12 9 1 52 WSW 0 9 23 20 8 0 60 w 2 18 30 43 11 4 108 WNW 1 19 20 76 9 1 126 NW 1 5 27 36 7 1 77 NNW 1 13 65 32 23 0 134 Variable 0 0 0 0 0 0 0 Total 9 167 372 278 90 12 928 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: 2 Page 67of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October -December 2017 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 11 12 3 0 0 28 NNE 3 9 17 1 0 0 30 NE 1 3 2 1 0 0 7 ENE 2 2 6 3 0 0 13 E 0 14 19 3 0 0 36 ESE 0 7 8 1 0 0 16 SE 1. 9 11 3 0 0 24 SSE 2 11 27 12 1 0 53 s 2 6 29 28 8 1 74 SSW 2 10 25 16 19 4 76 SW 1. 8 18 35 7 1 70 WSW 0 13 25 24 2 0 64 w 0 10 25 21 4 9 69 WNW 2 15 32 17 23 4 93 NW 1 8 29 5 0 0 43 NNW 0 12 12 4 4 0 32 Variable 0 0 0 0 0 0 0 Total 19 148 297 177 68 19 728 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: 2 Page 68 of77 LASALLE COUNTY NUCLEAR POWER ST A TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October -December 2017 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 4 0 0 0 0 4 NNE 0 1 0 0 0 0 1 NE 2 0 0 0 0 0 2 ENE 3 0 0 0 0 0 3 E 2 5 5 0 0 0 12 ESE 2 5 0 0 0 0 7 SE 4 7 2 0 0 0 13 SSE 1 7 9 2 0 0 19 s 2 10 6 6 0 0 24 SSW 0 17 3 10 2 0 32 SW 0 10 12 12 1 0 35 WSW 2 10 14 10 0 0 36 w 1 12 6 3 0 0 22 WNW 0 11 18 1 0 0 30 NW 1 2 4 0 0 0 7 NNW 0 2 1 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 20 103 80 44 3 0 250 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: 2 Page 69 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October -December 2017 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 1 0 0 0 0 1 NNE 0 0 0 0 0 0 0 NE 3 0 0 0 0 0 3 ENE 1 0 0 0 0 0 1 E 0 6 1 0 0 0 7 ESE 0 10 2 0 0 0 12 SE 1 24 2 0 0 0 27 SSE 3 18 5 0 0 0 26 s 2 10 9 0 0 0 21 SSW 0 10 29 1 0 0 40 SW 1 8 17 0 0 0 26 WSW 0 8 5 0 0 0 13 w 0 14 3 0 0 0 17 WNW 0 3 3 0 0 0 6 NW 0 1 0 0 0 0 1 NNW 1 6 0 0 0 0 7 Variable 0 0 0 0 0 0 0 Total 12 119 76 1 0 0 208 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: 2 Page 70of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October -December 2017 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: 2 Page 71of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October -December 2017 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 1 0 0 1 s 0 0 0 2 1 1 4 SSW 0 0 0 0 1 0 1 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 3 2 1 6 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: 2 Page 72of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October -December 2017 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 2 0 0 2 SSE 0 0 0 1 2 0 3 s 0 0 1 3 3 1 8 SSW 0 0 0 2 3 2 7 SW 0 0 0 0 4 0 4 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 8 12 3 24 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: 2 Page 73 of77 LASALLE COUNTY NUCLEAR POWER ST A TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October -December 2017 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 4 17 45 8 3 77 NNE 0 6 25 35 6 0 72 NE 0 4 8 26 12 4 54 ENE 0 6 8 25 5 4 48 E 1 4 16 7 1 0 29 ESE 0 3 8 4 2 1 18 SE 0 8 9 13 8 0 38 SSE 0 2 17 19 9 9 56 s 2 4 7 20 14 15 62 SSW 0 1 13 13 20 21 68 SW 0 5 19 14 23 17 78 WSW 0 6 15 19 31 11 82 w 0 7 22 23 33 27 112 WNW 0 6 17 25 68 41 157 NW 1 1 25 38 62 31 158 NNW 1 7 16 35 13 24 96 Variable 0 0 0 0 0 0 0 Total 5 74 242 361 315 208 1205 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: 2 Page 74 of77 LASALLE COUNTY NUCLEAR POWER ST A TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October -December 2017 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 1 4 1 2 4 0 12 NNE 0 5 3 9 0 0 17 NE 0 2 1 2 0 0 5 ENE 1 5 0 2 0 1 9 E 0 1 3 5 10 0 19 ESE 1 2 4 1 7 2 17 SE 0 4 8 2 3 0 17 SSE 0 2 1 13 19 9 44 s 0 2 11 15 25 46 99 SSW 2 1 7 18 12 39 79 SW 1 7 10 21 14 39 92 WSW 0 5 17 11 12 22 67 w 1 3 8 11 25 14 62 WNW 2 3 8 15 29 24 81 NW 2 4 4 15 15 4 44 NNW 2 1 4 12 13 0 32 Variable 0 0 0 0 0 0 0 Total 13 51 90 154 188 200 696 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: 2 Page 75 of77 LASALLE COUNTY NUCLEAR POWER ST A TION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October -December 2017 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 3 4 0 0 0 8 NNE 0 0 4 0 1 0 5 NE 1 0 0 1 0 0 2 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 1 1 0 2 1 0 5 SE 0 1 3 5 1 0 10 SSE 0 1 1 7 5 4 18 s 2 2 4 8 7 4 27 SSW 0 0 3 7 10 7 27 SW 1 8 6 5 11 5 36 WSW 0 1 5 11 3 8 28 w 0 0 1 5 1 0 7 WNW 0 0 1 4 8 2 15 NW 0 0 1 2 5 1 9 NNW 0 1 0 1 0 0 2 Variable 0 0 0 0 0 0 0 Total 6 18 33 58 53 31 199 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: 2 Page 76 of77 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2017) METEOROLOGICAL DATA LaSalle County Generating Station Period of Record: October -December 2017 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 1 0 0 0 1 NNE 0 1 0 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 1 0 0 0 0 0 1 ESE 0 1 1 0 0 0 2 SE 0 1 2 2 2 4 11 SSE 2 0 0 1 0 3 6 s 1 0 0 2 3 0 6 SSW 0 1 0 5 5 0 11 SW 0 0 6 12 7 0 25 WSW 1 0 1 2 1 0 5 w 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 1 2 2 0 0 0 5 NNW 0 0 1 1 0 0 2 Variable 0 0 0 0 0 0 0 Total 6 6 14 25 18 7 76 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: 2 Page 77of77

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