ML18117A057

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2017 Radioactive Effluent Release Report
ML18117A057
Person / Time
Site: Braidwood  Constellation icon.png
Issue date: 04/27/2018
From: Marchionda-Palmer M
Exelon Generation Co
To:
Document Control Desk
References
BW180045
Download: ML18117A057 (94)
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Exelon Generation Company, LLC lo Generation Braidwood Nuclear Power Station 35100 South Route 53, Suite 84 Braceville, IL 60407-9619 www.exeloncorp.com April 27, 2018 BW180045 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555-0001 Braidwood Station, Units 1 and 2 Renewed Facility Operating License Nos. NPF-72 and NPF-77 NRC Docket Nos. 50-456 and 50-457 ISFSI Docket No. 72-73

Subject:

2017 Radioactive Effluent Release Report The attached document includes the Radioactive Effluent Release Report for Braidwood Station. This report is being submitted in accordance with 10 CFR 50.36a, "Technical specifications on effluents from nuclear power reactors," and Technical Specification 5.6.3, "Radioactive Effluent Release Report," and includes a summary of radiological liquid and gaseous effluents and solid waste released from the site from January 2017 through December 2017.

If you have any questions regarding this information, please contact Marta Spillie, Regulatory Assurance Manager, at (815) 417-4833.

Respectfully, fll~' /MtdJrr~

Marri Marchionda-Palmer Site Vice President Braidwood Station cc: US NRC Regional Administrator, Region Ill US NRC Senior Resident Inspector - Braidwood Station NRR Project Manager - Braidwood Station Illinois Emergency Management Agency - Division of Nuclear Safety

Braidwood Nuclear Power Station Annual Radioactive Effluent Release Report (ARERR)

UNIT 1 AND 2 (Docket Numbers 50-456 and 50-457)

ISFSI (Docket Number 72-73)

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

DOCUMENT INDEX Preface ..................................................................................................................................................... 2 Introduction ............................................................................................................................................... 9 A. Supplemental Information ........................................................................................................... 9 B. Gaseous Effluents ....................................................................................................................... 16 C. Liquid Effluents ............................................................................................................................ 16 D. Radiological Impact on Man ........................................................................................................ 16 E. Meteorological Data .................................................................................................................... 18 F. Offsite Ambient Radiation Measurements ................................................................................... 18 G. Radioactive Solid Waste Disposal .............................................................................................. 19 APPENDIX A: EFFLUENT AND WASTE DISPOSAL

SUMMARY

.......................................................... 20 APPENDIX B: SOLID WASTE AND IRRADIATED FUEL SHIPMENTS ................................................. 30 APPENDIX C: WIND DIRECTION AND STABILITY CLASSES .............................................................. 34 APPENDIX D: ERRATA ........................................................................................................................... 92 Page 1 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73}

Preface The following sections of the preface are meant to help define key concepts, provide clarity, and give context to the readers of this report.

Annual Reports The Nuclear Regulatory Commission (NRG) is the federal agency who has the role to protect public health and safety through the development of regulations governing nuclear power reactors and ensuring their compliance. As part of the many commitments Nuclear Power Plants have NRG to ensure this safety, they provide two reports annually to specifically address how the station's operation impacts the environment of local communities. The NRG then reviews these reports and makes them available to the public. The names of the reports are the Annual Radioactive Effluent Release Report (ARERR) and the Annual Radiological Environmental Operating Report (AREOR).

The ARERR reports the results of the sampling from the effluent release paths at the station analyzed for radioactivity. An effluent is a liquid or gaseous waste containing plant-related radioactive material emitted at the boundary of the facility.

The AREOR reports the results of the samples obtained in the environment surrounding the station.

Environmental samples include air, water, vegetation, and other sample types that are identified as potential pathways radioactivity can reach humans.

Graphic 1. Examples of Gaseous and liquid Effluent Pathways Graphic 1 demonstrates some potential exposure pathways from Braidwood Nuclear Power Station. The ARERR and AREOR together ensure Nuclear Power Plants are operating in a manner that is within established regulatory commitments meant to adequately protect the public.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Understanding Radiation Generally radiation is defined as emitted energy in the form of waves or particles. If radiation has enough energy to displace electrons from an atom it is termed "ionizing", otherwise it is "non-ionizing". Non-Ionizing radiation includes light, heat given off from a stove, radiowaves and microwaves. Ionizing radiation occurs in atoms, particles too small for the eye to see. So, what are atoms and how does radiation come from them?

Graphic 2. Types of Radiation, from NASA Hubblesite The Electromagnetic Spectrum Wavelength In meiers

( i:t..dio

<-1 Aboul the size of:

tili; f Builcings

'E.I Grains Pro1azaans Bacteria of sugar Molecules Atoms Atomic nuclel An atom is the smallest part of an element that maintains the characteristics of that element. Atoms are made up of three parts: protons, neutrons, and electrons.

Graphic

3. Structure of an Atom Neutron*--------- ..

- --- - ~ - ..,

The number of protons in an atom determines the element. For example, a hydrogen atom will always have one proton while an oxygen atom will always have eight protons. The protons are clustered with the neutrons forming the nucleus at the center of the atom. Orbiting around the nucleus are the relatively small electrons.

Isotopes are atoms that have the same number of protons but different numbers of neutrons. Different isotopes of an element will all have the same chemical properties and many isotopes are radioactive while other isotopes are not radioactive. A radioactive isotope can emit radiation because it contains excess energy in its nucleus. Radioactive atoms and isotopes are also referred to as radionuclides and radioisotopes.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

There are two basic ways that radionuclides are produced at a nuclear power plant. The first is fission, which creates radionucides that are called fission products. Fission occurs when a very large atom, such as uranium-235 (U-235) or plutonium-239 (Pu-239), absorbs a neutron into its nucleus making the atom unstable. The unstable atom can then split into smaller atoms. When fission occurs there is a large amount of energy released, in the form of heat. A nuclear power plant uses the heat generated to boil water that spins turbines to produce electricity.

The second way a radionuclide is produced at a nuclear power plant is through a process called activation.

Radionuclides produced in this method are termed activation products. Pure water that passes over the fissioning atoms is used to cool the reactor and also produce steam to turn the turbines. Although this water is considered to be very pure, there are always some contaminants within the water from material used in the plant's construction and operation. These contaminants are exposed to the fission process and may become activation products. The atoms in the water itself can also become activated and create radionuclides.

Over time, radioactive atoms will reach a stable state and no longer be radioactive. To do this they must release their excess energy. This release of excess energy is called radioactive decay. The time it takes for a radionuclide to become stable is measured in units called half-lives. A half-life is the amount of time it takes for half of the original radioactivity to decay. Each radionuclide has a specific half-life. Some half-lives can be very long and measured in years while others may be very short and measured in seconds.

Graphic 4. Radioactive Decay Half-Life Half-life 1000 800 The amount of time it takes for half of the original radioactivity to decay 600 Activity 400 200 0

1 half-life 2 half-lives 3 half-lives 4 half*hves In the annual reports you will see both man made and naturally ocurring radionuclides listed, for example potassium-40 (K-40, natural) and cobalt-60 (Co-60, man-made). We are mostly concerned about man-made radionuclides because they can be produced as by-products when generating electricity at a nuclear power plant. It is important to note that there are also other ways man-made radionuclides are produced, such as detonating nuclear weapons. Weapons testing has deposited some of the same man-made radionuclides into the environment as those generated by nuclear power, and some are still present today because of long half-lives.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Measuring Radiation There are four different but interrelated units for measuring radioactivity, exposure, absorbed dose, and dose equivalent. Together, they are used to scientifically report the amount of radiation and its effects on humans.

  • Radioactivity refers to the amount of ionizing radiation released by a material. The units of measure for radioactivity used within the AREOR and ARERR are the Curie (Ci). Small fractions of the Ci often have a prefix, such as the microcurie (µCi), which means 1/1,000,000 of a Curie.
  • Exposure describes the amount of radiation traveling through the air. The units of measure for exposure used within the AREOR and ARERR are the Roentgen (R). Traditionally direct radiation monitors placed around the site are measured milliRoentgen (mR), 1/1,000 of one R.
  • Absorbed dose describes the amount of radiation absorbed by an object or person. The units of measure for absorbed dose used within the AREOR and ARERR are the rad. Noble gas air doses are reported by the site are measured in millirad (mrad), 1/1,000 of one rad.
  • Dose equivalent (or effective dose) combines the amount of radiation absorbed and the health effects of that type of radiation. The units used within the AREOR and ARERR are the Roentgen equivalent man (rem). Regulations require doses to the whole body, specific organ, and direct radiation to be reported in millirem (mrem), 1/1,000 of one rem.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Sources of Radiation People are exposed to radiation every day of their lives and have been since the dawn of mankind. Some of this radiation is naturally occurring while some is man-made. There are many factors that will determine the amount of radiation individuals will be exposed to such as where they live, medical treatments, etc. The average person in the United States is exposed to approximately 620 mrem each year. Half of this exposure, 310 mrem, comes from natural sources and the other half, 310 mrem, from man-made sources. Graphic 5 shows what the typical sources of radiation are for an individual over a calendar year:

Graphic 5. Sources of Radiation Exposure in the U.S., fram NCRP Repart No. 160 Sources of Radiation Exposure in the U.S.

Industrial and Terrestrial (Soil) - 3%

Occupational lntemal-5% <0.1%

Consumer - 2%

Nuclear Medicine 12%

CJ* -310 Natural Sources - 50%

millirem (0.31 rem)

- Manmade Sources - 50%

-310 millirem (0.31 rem)

Source1 NCRP R11port No. l!iO {20091 Full reportinvailable on the NCRPweb;lte~twvN1.NCRPonlin11.011 The radiation from a nuclear power plant is included in the chart as part of the "Industrial and Occupational" fraction, <0.1 %. The largest natural source of radiation is from radon, because radon gas travels in the air we breathe. Perhaps you know someone who had a CT scan at a hospital to check his or her bones, brain, or heart. CT scans are included in the chart as "Medical Procedures" which make up the next largest fraction.

Graphic 6 on the following page shows some of the common doses humans receive from radiation every year.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Graphic 6 .Relative Dases fram Radiation Sources, from EPA Radiation Doses and Sources RELATIVE DOSES FROM RADIATION SOURCES All doses from the National Council on ltadlaUon Protection & Measurements, Report No. 160 {unless otherwise denoted)

Whole body CT 1,000 mllllrem (stngle procNure}

Upper GutrolntMtlnal x-ray axam with nuoroscopy 600mllllrem (single procedure}

Radon In avera11e U.S. home 22Bmllllrem (annual)

H1111dCT 200 mllllrem

(*Ingle procedunt)

Coamlc radiation living In Denver (high elevation) approxlmatelv BO mllllrem (annual)

Mammo11ram 42 mllllrem (single procedunt}

~ Cosmic radiation llvlng at 1u From lCRP 2007 level (low elavatlon) approxlmatelv 30 mllllram (annual)

Radiation In the body 211 mllllrem (annual)

Terrestrial radioactivity 21 mll11rem (annu*IJ ci...tx*ray lOmllllrem

(*Ingle procedurw)

Living near a nuclear power station

< 1 mllllrem (annual}

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Radiation Risk Current science suggests there is some risk from any exposure to radiation. However, it is very hard to tell whether cancers or deaths can be attributed to very low doses of radiation or by something else. U.S.

radiation protection standards are based on the premise that any radiation exposure carries some risk.

The following graph is an example of one study that tries to relate risk from many different factors. This graph represents risk as "Days of Lost Life Expectancy. All the categories are averaged over the entire population except Male Smokers, Female Smokers, and individuals that are overweight. Those risks are only for people that fall into those categories. The category for Nuclear Power is a government estimate based on all radioactivity releases from nuclear power, including accidents and wastes.

Graphic 7. Days of Lost Life Expectancy, Adapted from the Journal of American Physicians and Surgeons Volume 8 Number 2 Summer2003 Days of Lost Life Expectancy Smoking* Men Heart Disease Smoking* Women Cailler Every 10 lbs overweight Stroke -

Motor Vehicle Accident -

Air Polluti0t1 I Radon I Clwmkal Residue in Foods I Drowning I ll11rrir anP> ar:d TornadtlE"i lightning 0 500 10'.JO 1500 7000 2500 3000 Days of Lost Life Expectancy H11nirarli?<>,md Tornado<ar Power I 0 02 0.4 0.6 0.8 1.4 2 Page 8 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Introduction This report quantifies the radioactive gaseous, liquid, solid radioactive waste (radwaste) releases, and summarizes the local meteorological data for the period from January 01, 2017 through December 31, 2017.

This report has been prepared utilizing the methodology and parameters specified in the calculation of offsite doses resulting from radioactive gaseous and liquid effluents found in Braidwciod's Offsite Dose Calculation Manual (ODCM). It has been formatted consistent with Exelon Procedure CY-AA-170-2000 "ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT" and exceeds the requirements specified in Regulatory Guide 1.21 Revision 1, "MEASURING, EVALUATING, AND REPORTING RADIOACTIVITY IN SOLID WASTES AND RELEASES OF RADIOACTIVE MATERIALS IN LIQUID AND GASEOUS EFFLUENTS FROM LIGHT-WATER-COOLED NUCLEAR POWER PLANTS."

The quantity of radioactive material released from Braidwood Nuclear Power Plant was determined from in-house and vendor laboratory analysis of continuous inline sampling media and batch sample media from all ODCM specified effluent pathways. These pathways include continuous releases from the Unit 1 and 2 Station Vent Stacks, Exelon Pond Remediation, Turbine Building Remediation, Vacuum Breaker #1 Remediation, Condensate Polisher Sump, Waste Water Treatment, and Circulating Water Slowdown. The ODCM specified effluent pathways also include batch releases from the Unit 1 and Unit 2 Primary Containments, Waste Gas Decay Tanks, and Liquid Radwaste Batch Release Tanks. The quantification of radioactive material released from Braidwood Nuclear Power Plant also includes non-routine planned discharges from two remediation wells, installed in 2017 at the River Screen House, that are not currently listed as ODCM effluent pathways.

The volume and quantity of radioactive waste shipped offsite from Braidwood Nuclear Power Plant for processing and disposal were determined from data maintained in the radwaste shipping database.

Radwaste processed for shipment was in accordance with Exelon procedure RW-AA-100, "PROCESS CONTROL PROGRAM FOR RADIOACTIVE WASTES" and consistent with the UFSAR.

Meteorological data was obtained from the 320-foot meteorological tower located on the Braidwood Station premises.

A. Supplemental Information

1. Regulatory Limits
a. Fission and Activation Gases:

Dose Rate

1) Less than 500 mrem/year to the whole body (instantaneous limit, per site).
2) Less than 3,000 mrem/year to the skin (instantaneous limit, per site).

Dose Gamma Radiation

1) Less than or equal to 5 mrad/quarter (per unit).
2) Less than or equal to 10 mrad/year (per unit).

Dose Beta Radiation

1) Less than or equal to 1O mrad/quarter (per unit).
2) Less than or equal to 20 mrad/year (per unit).
b. Iodine: (summed with particulate and tritium, see below)

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

c. Particulates with half-lives > 8 days:

Dose Rate

1) Less than 1,500 mrem/year to any organ (instantaneous limit, per site).

Dose

1) Less than or equal to 7.5 mrem/quarter to any organ (per unit).
2) Less than or equal to 15 mrem/year to any organ (per unit).
d. Liquid Effluents Dose
1) Less than or equal to 1.5 mrem to the whole body during any calendar quarter (per unit).
2) Less than or equal to 5 mrem to any organ during any calendar quarter (per unit).
3) Less than or equal to 3 mrem to the whole body during any calendar year (per unit).
4) Less than or equal to 1O mrem to any organ during any calendar year (per unit).
2. Effluent Concentration Limits
a. Fission and Activation Gases: 10CFR20 Appendix B Table 2
b. Iodine: 10CFR20 Appendix B Table 2
c. Particulates: 10CFR20 Appendix B Table 2
d. Liquid Effluents: 1OX10CFR20 Appendix B Table 2
3. Average Energy The ODCM limits the dose equivalent rates due to the release of noble gases to less than or equal to 500 mrem/yr to the total body, and less than or equal to 3,000 mrem/yr to the skin. Therefore, the average beta and gamma energies (E) for gaseous effluents as described in Regulatory Guide 1.21 are not applicable.
4. Measurements and Approximations of Total Radioactivity
a. Fission and activation gases:

Before being discharged, containment batch releases are analyzed for noble gas via gamma spectroscopy. Gaseous decay tanks are analyzed for noble gases before being discharged via gamma spectroscopy. Released activity is normally calculated using volume of release, which is determined by purge flow rate times the duration of the discharge.

The Auxiliary Building ventilation exhaust system is continually monitored for radioactive iodines (radioiodines) and particulates. These samples are pulled every seven days and analyzed via gamma spectroscopy.

Noble gas samples are pulled and analyzed weekly by gamma spectroscopy. The average flow at the release points and nuclide specific activity concentrations are used to calculate the activity released.

Volumes and activities of effluents discharged from systems that are common to both units are divided between both units.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

b. Iodines:

Radioiodines in the Auxiliary Building ventilation exhaust system are continually being collected via activated charcoal cartridges in the diverted sample process flow. The iodine cartridges are pulled weekly and analyzed via gamma spectroscopy. Radioiodine concentrations greater than the lower limit of detection (LLD) are multiplied by the volume of air discharged during the sampling timeframe.

Radioiodines are analyzed in liquid effluent streams through performance of batch release tank grab samples and weekly liquid effluent composite samples. The analyses are performed via gamma spectroscopy of the liquid samples.

Volumes and activities of effluents discharged from systems that are common to both units are divided between both units. Effluents that are unit specific are assigned to the appropriate unit.

c. Particulates, half-lives > 8 days:

Particulates in the Auxiliary Building ventilation exhaust system are continually being collected via filter media in the diverted sample process flow. Particulate filter media is pulled weekly and analyzed via gamma spectroscopy. Particulate concentrations greater than LLD are multiplied by the volume of air discharged during the sampling timeframe. A composite sample is created from 3 month's particulate sample media for Sr-89/90, Fe-55, Ni 63, and gross alpha analysis by an offsite vendor. The vendor supplied data is utilized in conjunction with the volume of air released through the Auxiliary Building ventilation to quantify Sr-89/90, Fe-55, Ni-63, and gross alpha releases.

Volumes and activities of effluents discharged from systems that are common to both units are divided between both units. Effluents that are unit specific are assigned to the appropriate unit.

d. Tritium:

Before being discharged, containment batch releases are analyzed for tritium via a liquid scintillation counter (LSC). Tritium is sampled using a flow-through bubbler system. Released activity is calculated using volume of release, which is determined by purge flow rate multiplied by the duration of the discharge.

The Auxiliary Building ventilation exhaust system is monitored for tritium using a flow-through bubbler system. Tritium is sampled every seven days and analyzed by LSC.

The secondary sides of both units contain tritium. Minimal amounts of tritium are continually released to the atmosphere from secondary components through packing leaks, tank vents, the main condenser, etc. Bounding calculations have been performed to show that large leaks (1000 gallons/day (gpd)) for extended periods (1 month) at normal secondary tritium concentrations would provide an insignificant increase (1.00E-5 mrem) in offsite dose.

e. Gross alpha Gross alpha is analyzed in both the gaseous and liquid effluent pathways. Weekly gaseous particulate media is composited for offsite vendor analysis. Gross alpha activity greater than vendor LLD values are assigned to the applicable timeframe and gaseous volume released.

Liquid effluent gross alpha analysis is performed through compositing monthly discharges and gas flow proportional counting.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73}

f. Carbon-14 Carbon-14 (C-14) is assessed in continuous gaseous effluents using Electric Power Research lnstitute's (EPRI} industry accepted production mechanism and production rate study 1021106.

C-14 production is a function of each unit's full power operation and gaseous volume released.

C-14 is not evaluated through laboratory sample analysis.

g. Liquid effluents:

Liquid effluents are categorized as either batch release or continuous release. All liquid releases are analyzed for principal gamma emitters, radioiodines, dissolved and entrained gases, gross alpha, and tritium onsite via gamma spectroscopy, gas flow proportional counting, or liquid scintillation, as appropriate. An offsite laboratory analyzes liquid composites for Sr-89/90, Fe-55 and Ni-63. Vendor results are applied to the applicable volume of liquids discharged during the timeframe. Volumes and activities of effluents discharged from systems or locations are divided between both units.

h. Estimated Total Error Present Procedure CY-AA-170-2100, Estimated Errors of Effluent Measurements provides the methodology to obtain an overall estimate of the error associated with radioactive effluents.

Estimated total error is calculated periodically and communicated as part of Appendix A Effluent and Waste Disposal Summary.

i. Lower Limit of Detection (LLD)

Samples are analyzed such that the Offsite Dose Calculation Manual (ODCM) LLD requirements are met. When a nuclide is not detected during the quarter then <LLD is reported. The ODCM required lower limit of detection for airborne and liquid releases are as follows:

Table 4.i ODCM Effluent LLD Values Airborne: LLD Gross Aloha Sr-89 Sr-90 1.00E-11 uCi/cc H-3 1.00E-07 uCi/cc 1-131 in Charcoal Samples 1.00E-12 11Ci/cc 1-133 in Charcoal Samples 1.oo E-1 o uCi/cc Principal Gamma Emitters (Mn-54, Fe-59, Co-58, Co-60, Zn-65, Mo-99, Cs-134, Cs-137, 1-131, Ce-141, Ce-144) in Grab Samples 1.00E-04 µCi/cc Principal Gamma Emitters (Mn-54, Fe-59, Co-58, Co-60, Zn-65, Mo-99, 1.00E-11 µCi/cc Cs-134, Cs-137, 1-131, Ce-141, Ce-144) in Particulate Samples Noble Gas (Kr-87, Kr-88, Xe-133, Xe-133m, Xe-135, Xe-138), Gross Beta or Gamma 1.00E-06 µCi/cc Page 12 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Table 4.i ODCM Effluent LLD Values (continued)

Liquid: LLD Principal Gamma Emitters except Ce-144 (Mn-54, Fe-59, Co-58, Co-5.00E-07 uCi/ml 60 Zn-65 Mo-99 Cs-134 Cs-137. Ce-141)

Ce-144 5.00E-06 uCi/ml 1-131 1.00E-06 uCi/ml Entrained Gases (Kr-87, Kr-88, Xe-133 Xe-133m Xe-135 Xe-138) 1.00E-05 uCi/ml H-3 1.00E-05 uCi/ml Gross Alpha 1.00E-07 uCi/ml Sr-89, Sr-90 5.00E-08 uCi/ml Fe-55 1.00E-06 uCi/ml This list does not mean that only these nuclides are considered, but this list is used to ensure acceptable detection standards. Braidwood tests and maintains LLD records in accordance with procedure CY-AA-130-201 "Radiochemistry Quality Control."

5. Batch Releases
a. Liquid Batch Releases 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr. Total
1. Total Number of Batch Releases 19 26 26 28 99
2. Total Time Period for Batch Releases (minutes) 3.06E+04 4.11 E+04 3.60E+04 6.08E+04 1.68E+05
3. Maximum Time Period for a Batch Release (minutes) 3.54E+03 3.32E+03 5.77E+03 6.02E+03 6.02E+03
4. Average Time Period for a Batch Release (minutes) 1.61E+03 1.58E+03 1.38E+03 2.17E+03 1.70E+03
5. Minimum Time Period for a Batch Release (minutes) 1.89E+02 2.11 E+02 9.00E+01 7.02E+02 9.00E+01
6. Average Stream Flow During Periods of Release 1.13E+07 1.75E+07 5.72E+06 9.06E+06 1.09E+07 of Effluent into a Flowing Stream (liters/min) 1
b. Gaseous Batch Releases 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr. Total
1. Total Number of Batch 52 62 49 70 233 Releases
2. Total Time Period for 8.41 E+03 3.78E+04 1.38E+04 3.74E+04 9.74E+04 Batch Releases (minutes)
3. Maximum Time Period for 1.51 E+03 1.28E+04 2.30E+03 2.19E+03 1.28E+04 a Batch Release (minutes)
4. Average Time Period for 1.62E+02 6.10E+02 2.82E+02 5.34E+02 4.18E+02 a Batch Release (minutes)
5. Minimum Time Period for 1.90E+01 2.20E+01 2.30E+01 2.20E+01 1.90E+01 a Batch Release (minutes) 1 Kankakee River Flows obtained from US Geological Survey website from daily average flow data.

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6. Abnormal Releases
a. Leaks and Spills There was one abnormal liquid release that occurred in 2017. It is described below:

On June 11 1h, 2017 it was it was identified that water being removed as part of maintenance activities in the Circulating Water Slowdown (CWBD) House was discharged to the ground approximately 50 feet from the discharge canal. Once discovered, the discharge was terminated and the area was inspected. The investigation determined that approximately 35,000 gallons of water was released between May 28, 2017 and June 11, 2017, with variable concentrations with a maximum tritium concentration of 200,209 pCi/L. The water released did not migrate off station property.

Corrective actions taken in response to this event included the placement of multiple monitoring wells at various depths in the vicinity of the CWBD house to determine soil contamination levels, as well as the establishment of soil remediation efforts to remove the tritium contamination from the area. The discharges of remediation wells are treated as non-routine planned discharges.

They are sampled regularly and permitted in the same manner as other ODCM pathways. The corresponding activity values and doses are included as part of liquid effluent releases in this report.

7. Radioactive Waste Treatment System Changes There were no changes to the gaseous radioactive waste treatment system, the ventilation exhaust treatment system, or the liquid radioactive waste treatment system in 2017.
8. Changes to the Annual Land Use Census The 2017 Land Use Survey was performed on August 16, 2017. The only changes identified between the 2017 survey and the previous year's survey were related to livestock. Three sectors (ENE, S, SW) that previously had beef cattle, had no cattle in the 2017 survey. This change cannot affect an increase in calculated dose from station effluents via the food ingestion pathway and no action was required. No change was required to the Radiological Environmental Monitoring Program (REMP).
9. Radioactive Effluent Monitoring Instrumentation Out of Service for More than 30 Days There were no radioactive effluent monitoring instruments out of service for more than 30 days in 2017.
10. Revisions to the ODCM There were no changes to the Braidwood Station ODCM in 2017.
11. Independent Spent Fuel Storage Installation (ISFSI)

An Independent Spent Fuel Storage Installation (ISFSI) was placed in service at Braidwood Station in 2011. The ISFSI is a closed system and the only exposure would be due to direct radiation, which is measured by Optically Stimulated Luminescent Dosimetry (OSLO). In 2017 the dose to the nearest resident from the ISFSI was estimated to be 3.40E-01 mrem. This estimate was determined using environmental dosimeters from the Radiological Environmental Monitoring Program.

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12. ERRATA There were no errors to previous reports identified in 2017.
13. Sampling and Instrumentation Issues
a. On June 26, 2017, the flow totalizer instrumentation used to quantify the discharge volume from site remediation well RW-11 was found not functioning. The flow totalizer was replaced later the same day.
b. On July 7, 2017, compensatory sampling measures were in place due to inoperable composite samplers at remediation wells RW-11 and RW-12. The compensatory sampling measures include manual grab samples three times per day. Due to infrequent automatic pumping of the remediation wells, only two grab samples were obtained from RW-11 and RW-12 discharge on this date.
c. On July 19, 2017, the automatic composite sampler for remediation well RW-12 was found with a "full bottle error" preventing further continuous composite sampling. A grab sample was obtained at the time of discovery. An issue with the sampler purge was identified and corrected, allowing the sampler to resume proper sampling sequences. The full bottle occurred on 7/17/17 at 2300 and the condition was corrected on 7/19/17 at 1400.
d. On September 25, 2017, the Station's Circulating Water Slowdown (CWBD) composite sampler was found de-energized due to a faulty electrical power outlet. The sampler was re-energized from a functional power outlet and automatic composite sampling was restored 9/25/27 at 1133.

Investigation found that the first missed sample due to the power outage occurred 9/23/17 at 0644. During the compositors' power outage from 9/23/17 at 0644 to 9/25/17 at 1133, compensatory grab samples were not performed.

e. On October 5, 2017, the Station's Condensate Polisher (GP) Sump composite sampler was found not operating. The exact cause of the malfunction was not able to be determined, but was believed to be a power supply related trip when the OPR41 J alarm was received by operations for lost flow on 10/4/17. The composite sampler was returned to service and was restored to proper function shortly after the discovery. The compositor had been checked and was operating correctly during routine checks on 10/2/17 at 0820. The maximum approximate time frame for the composite sampler not functioning was 10/2/17 0820 to 10/5/17 at 0805, although it is believed timeframe was shorter and the malfunction occurred 10/4/17 (time undetermined).

During that time, compensatory grab samples were not performed.

f. On November 21, 2017 it was identified that the weekly analysis of the Diesel Driven Auxiliary Feed Pumps (DDAF) air intake had not been sampled and analyzed for noble gas as expected on 11 /16/17. The tritium grab sample, normally taken at the time of the noble gas grab sample had been completed and analyzed. The normal samples for particulate and Iodine had also been completed for this time frame. The results for tritium, particulate, and iodine were less than the LLD. The previous week's sample results were reviewed for all the DDAF air intake analyses and all had been <LLD. No plant conditions existed that would indicate noble gas may have been present in the DDAF air intake.
g. On December 18, 2017, during routine activities, it was noted that the composite sampler for CWBD had a very small sample volume. CWBD flow had been shut down for six days and the sample volume contained within the compositor was correct for the short time that CWBD flow had been available to sample. A delay in the analysis caused the required LLD for dissolved and entrained gasses not to be met. All other isotopic analyses Were properly carried out on the available sample and the results showed no radionuclides were present.

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h. On December 29, 2017, the composite samplers for remediation wells RW-11 and RW-12 were found to be not functioning due to frozen conditions in the sampler tubing and sample receptacles. The exact duration of the frozen conditions and lack of sampling for the remediation wells discharge could not be determined, but the samplers were functioning when checked on 12/28/17. Remediation was secured and was not resumed before the end of the year.

B. Gaseous Effluents Gaseous radioactive releases for 2017 captured in Tables 1A, 1B-1, and 1B-2 in Appendix A for Units 1 and 2 combined. Radioactive noble gases released for the timeframe totaled 3.69E-01 Curies. Releases of all radioiodines, halogens, and particulates totaled 4.31 E-04 Curies. Gaseous tritium releases totaled 2.82E+02 Curies. Gaseous carbon-14 was calculated to total 8.39E+OO Curies. No gross alpha was detected in gaseous effluents.

C. Liquid Effluents Liquid radioactive releases for 2017 are captured in Tables 2A, 2B-1, and 2B-2 in Appendix A for Units 1 and 2 combined. Ninety-nine (99) liquid batch releases occurred during the reporting period. These discharges contained 2.42E+03 Curies of tritium and 9.22E-02 Curies of fission and activation products.

D. Radiological Impact on Man

1. Dose to Members of the Public at or Beyond Site Boundary Per ODCM Chapter 6.1 the Annual Radioactive Effluent Release Report shall include an assessment of radiation doses to the hypothetically highest exposed MEMBER OF THE PUBLIC from reactor releases, ISFSI and other nearby uranium fuel cycle sources (including doses from primary effluent pathways and direct radiation) for the previous calendar year. The ODCM does not require population doses to be calculated. For purposes of calculation, the following assumptions were made per the ODCM:
  • Long term annual average meteorology X/Q and D/Q and actual gaseous effluent releases were used.
  • Gamma air dose, Beta air dose, Total Body and Skin doses were attributed to noble gas releases.
  • A 0.7 shielding factor was assumed to account for shielding due to occupancy of structures
  • Doses, Design Objective Limit, and Dose Limit comparisons reported combined for the site (Units 1 and 2 together).
  • Dosimetry measurements obtained from the highest station values in the Radiological Environmental Monitoring Program were used to calculate dose to the nearest residence from the Independent Spent Fuel Storage Installation (ISFSI). The dose measured at the station was extrapolated to the residence location.
  • The highest doses from the critical organ and critical age group for each release pathway was summed and added to the net dosimetry measurement from nearest residence to the ISFSI for 40CFR190 and 10CFR72.104 dose compliance.
  • Evaluation of 40CFR190 and 10CFR72.104 dose is used to demonstrate compliance to 10CFR 20 and satisfy station RETS and Technical Specifications.

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a. Gaseous Releases The critical age-organ was the child-bone. Calculated total body dose was 3.94E-01 mrem and organ dose was 1.76E+OO mrem.
b. Liquid Releases The critical age-organ was the child-GI-LU. Calculated total body dose was 7.78E-02 mrem and organ dose was 7.88E-02 mrem.
c. 40CFR190 and 10CFR72.104 Compliance The Braidwood ODCM defines the total dose for the uranium fuel cycle as the sum of doses due to radioactivity in airborne and liquid effluents and the doses due to direct radiation from contained sources at the nuclear power station (ODCM A.4.2 Total Dose, Equation A-25). The total dose, nror, in the unrestricted area to a member of the public due to plant operations is given by:

Where:

nror Total Dose to Member of Public [mrem]

Total off-site dose to a member of public due to plant operations.

nEx Total External Total Body Dose [mrem]

Total body dose due to external exposure to noble gases, N-16 skyshine and on-site storage facilities.

D~~q Liquid Effluent Dose [mrem]

Dose due to liquid effluents to age group a and organ j. The age group and organ with the highest dose from liquid effluents is used.

D~NG Non-Noble Gaseous Effluent Dose [mrem]

Dose due to non-noble gaseous effluents to age group a and organ j. The age group and organ with the highest dose from non-noble gas effluents is used.

The maximum calculated dose to a real individual would not exceed 8.12E-01 mrem (total body),

2.18E+OO mrem (organ), or 8.18E-01 mrem (thyroid)

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Table D.1 Summary of Gaseous and Liquid Effluent Oases ta Members af the Public at the Highest Dase Receptors vs 10 CFRSO Design Objectives Design

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

Nearest Residence Gamma Air Dose 1.15E-05 All 5.75E-05 20 mrad Nearest Residence Beta Air Dose 1.99E-05 All 4.98E-05 40 mrad Nearest Residence Total Bodv 1.07E-05 All 1.07E-04 10 mrem Nearest Residence Skin 2.31 E-05 All 7.69E-05 30 mrem Non-Noble Gas Nearest Residence Bone 1.76E+OO Child 5.87E+OO 30 mrem Liquid Nearest Residence Total Bodv 7.78E-02 Child 1.30E+OO 6 mrem Nearest Residence GI-LU 7.88E-02 Child 3.94E-01 20 mrem Table D.2 Summary af Doses ta Members of the Public at the Highest Dase Receptors far 40CFR190 and 10CFR74.104 Compliance Non- External %of Highest Dose Noble Liquid Direct Total Applicable Limit Unit Receptors Gas Effluents Radiation Limit Total Body Dose 3.94E-01 7.78E-02 3.40E-01 8.12E-01 3.25E+OO 25 mrem Oroan Dose 1.76E+OO 7.88E-02 3.40E-01 2.18E+OO 8.73E+OO 25 mrem Thyroid Dose 4.00E-01 7.78E-02 3.40E-01 8.18E-01 1.09E+OO 75 mrem E. Meteorological Data The Braidwood Station meteorological monitoring program produced 52,078 hours9.027778e-4 days <br />0.0217 hours <br />1.289683e-4 weeks <br />2.9679e-5 months <br /> of valid data out of a possible 52,560 parameter hours during 2017 (365 days x 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />s/day x 6 measured priority parameters), which represents an overall data recovery rate of 99.8%. Priority parameters are all parameters except dew point temperature and precipitation. For the year, winds measured at 34 ft. most frequently came from the West-(10.63%) and fell into the 3.6 - 7.5 mph wind speed class (41.53%).

Calms (wind speeds at or below the sensor threshold) were measured 0.00% of the time and speeds greater than 24.5 mph were measured 0.07% of the time. Stability based on the 199 - 30 ft. differential temperature most frequently fell into the slightly stable classification (39.86%).

Appendix C contains the Joint Frequency Distribution tables from the Meteorological Data collected in 2017.

F. Offsite Ambient Radiation Measurements Review of the Braidwood Optically Stimulated Luminescent Dosimetry (OSLD) data showed statistical increases above background at only locations related to the ISFSI pad. A dose evaluation was performed taking the highest readings and extrapolating dose to the nearest resident. The dose to the resident was estimated to be 3.40E-01 mrem in 2017.

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G. Radioactive Solid Waste Disposal Radioactive wastes shipped offsite are captured in the table titled, "Solid Wastes Shipped Offsite for Burial or Disposal (Not irradiated fuel)." Approximately 5.49E+02 cubic meters of solid waste was shipped offsite containing approximately 1.11 E+02 Curies during the 2017 reporting period. Appendix B contains tables and detailed information about the Solid Waste Disposal program.

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TABLE 1A GASEOUS EFFLUENTS- - SUMMATION OF ALL RELEASES UNIT 1 AND 2 Est. Total Unit 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Total Error%

A. Fission and Activation Gas Releases

1. Total Release Activity Ci 5.11 E-02 2.67E-01 5.14E-02 <LLD 3.69E-01 7.59E+OO I
2. Average Release Rate µCi/sec 6.57E-03 3.39E-02 6.47E-03 <LLD 1.17E-02
3. Percent of ODCM Limit -

gamma  % 4.07E-06 1.07E-04 4.10E-06 N/A 5.74E-05

4. Percent of ODCM Limit -

% 9.87E-06 7.97E-05 9.93E-06 N/A 4.98E-05 beta

8. Iodine Releases
1. Total lodine-131 Ci 3.09E-09 2.03E-06 9.91 E-07 1.78E-05 2.0BE-05 3.32E+01 I
2. Average Release Rate µCi/sec 3.97E-10 2.58E-07 1.25E-07 2.24E-06 6.60E-07
3. Percent of ODCM Limit  % 3.05E+OO 2.60E+OO 2.99E+OO 3.12E+OO 5.88E+OO C. Particulate(> 8-day half-life) Releases
1. Particulates with half-lives

> 8 days Ci <LLD 1.55E-06 <LLD <LLD 1.55E-06 1.98E+01 l

2. Average Release Rate µCi/sec <LLD 1.97E-07 <LLD <LLD 4.91 E-08
3. Percent of ODCM Limit  % 3.05E+OO 2.60E+OO 2.99E+OO 3.12E+OO 5.BBE+OO D. Tritium Releases
1. Total Release Activity Ci 2.88E+01 1.44E+02 4.92E+01 6.06E+01 2.82E+02 8.07E+OO I
2. Average Release Rate µCi/sec 3.70E+OO 1.83E+01 6.19E+OO 7.62E+OO 8.95E+OO
3. Percent of ODCM Limit  % 3.05E+OO 2.60E+OO 2.99E+OO 3.12E+OO 5.BBE+OO E. Gross Alpha Releases
1. Total Release Activity Ci <LLD <LLD <LLD <LLD <LLD 1.98E+01 I
2. Average Release Rate µCi/sec N/A N/A N/A N/A N/A
3. Percent of ODCM limit  % N/A N/A N/A N/A N/A F. Carbon-14 Releases
1. Total Release Activity Ci 2.17E+OO 1.86E+OO 2.13E+OO 2.22E+OO 8.39E+OO
2. Average Release Rate µCi/sec 2.BOE-01 2.36E-01 2.69E-01 2.BOE-01 2.66E-01
3. Percent of ODCM limit  % 3.05E+OO 2.60E+OO 2.99E+OO 3.12E+OO 5.88E+OO Note: ODCM LLD threshold values are included in Table 4.i of this report.

Note: The ODCM Limit is a dose based limit combined for Iodines, Particulate, Tritium and C-14.

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APPENDIX A: EFFLUENT AND WASTE DISPOSAL

SUMMARY

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TABLE 18-1 GASEOUS EFFLUENTS - MIXED MODE RELEASES - CONTINUOUS MODE UNIT 1 AND 2 Nuclides Released Continuous Mode A. Fission Gases Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ar-41 Ci <LLD <LLD <LLD <LLD <LLD Kr-85 Ci <LLD <LLD <LLD <LLD <LLD Kr-85m Ci <LLD <LLD <LLD <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD <LLD Xe-131m Ci <LLD <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD <LLD Xe-135m Ci <LLD <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD <LLD Total for Period Ci <LLD <LLD <LLD <LLD <LLD

8. Iodines I Halogens Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Br-82 Ci <LLD 6.98E-06 <LLD 8.90E-06 1.59E-05 1-131 Ci <LLD 1.62E-06 <LLD 2.27E-06 3.89E-06 1-132 Ci <LLD <LLD <LLD <LLD <LLD 1-133 Ci 4.77E-06 <LLD 7.34E-06 4.01 E-05 5.22E-05 1-134 Ci <LLD <LLD <LLD <LLD <LLD 1-135 Ci <LLD <LLD <LLD <LLD <LLD Total for Period Ci 4.77E-06 8.61 E-06 7.34E-06 5.13E-05 7.20E-05
c. Particulates Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Mn-54 Ci <LLD <LLD <LLD <LLD <LLD Co-57 Ci <LLD 1.55E-06 <LLD <LLD 1.55E-06 Co-58 Ci <LLD <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD <LLD 22 of 92

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TABLE 1B-1 (Cont.)

GASEOUS EFFLUENTS - MIXED MODE RELEASES - CONTINUOUS MODE UNIT 1 AND 2 Nuclides Released Continuous Mode

c. Particulates (Cont.) Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total La-140 Ci <LLD <LLD <LLD <LLD <LLD Total for Period Ci <LLD 1.55E-06 <LLD <LLD 1.55E-06 D. Tritium Unit Quarter 1 Quarter 2 Quarter3 Quarter 4 Total Ci 2.69E+01 1.40E+02 4.53E+01 2.36E+01 2.36E+02 E. Gross Alpha Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ci <LLD <LLD <LLD <LLD <LLD F. Carbon-14 Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ci 2.17E+OO 1.86E+OO 2.13E+OO 2.22E+OO 8.39E+OO 23 of 92

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TABLE 1B-2 GASEOUS EFFLUENTS - MIXED MODE RELEASES - BATCH MODE UNIT 1 AND 2 Nuclides Released Batch Mode A. Fission Gases Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ar-41 Ci <LLD 2.59E-02 <LLD <LLD 2.59E-02 Kr-85 Ci <LLD <LLD <LLD <LLD <LLD Kr-85m Ci <LLD 3.05E-03 <LLD <LLD 3.05E-03 Kr-87 Ci <LLD <LLD <LLD <LLD <LLD Kr-88 Ci <LLD 3.23E-03 <LLD <LLD 3.23E-03 Xe-131m Ci <LLD <LLD <LLD <LLD <LLD Xe-133 Ci 5.11 E-02 1.73E-01 5.14E-02 <LLD 2.76E-01 Xe-135 Ci <LLD 6.12E-02 <LLD <LLD 6.12E-02 Xe-135m Ci <LLD <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD <LLD Total for Period Ci 5.11 E-02 2.67E-01 5.14E-02 <LLD 3.69E-01 B. Iodines I Halogens Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Br-82 Ci 2.12E-05 1.97E-05 3.24E-05 4.75E-05 1.21 E-04 1-131 Ci 3.09E-09 4.07E-07 9.91 E-07 1.55E-05 1.69E-05 1-132 Ci <LLD 9.37E-06 1.23E-07 3.27E-05 4.22E-05 1-133 Ci 5.37E-07 1.25E-06 3.78E-06 8.12E-05 8.67E-05 1-134 Ci <LLD <LLD <LLD 3.18E-06 3.18E-06 1-135 Ci <LLD 2.83E-07 2.31 E-06 8.49E-05 8.75E-05 Total for Period Ci 2.18E-05 3.11 E-05 3.96E-05 2.65E-04 3.57E-04

c. Particulates Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Mn-54 Ci <LLD <LLD <LLD <LLD <LLD Co-57 Ci <LLD <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD <LLD 24 of 92

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TABLE 1 B-2 (Cont.)

GASEOUS EFFLUENTS - MIXED MODE RELEASES - BATCH MODEUNIT 1 AND 2 Nuclides Released Batch Mode

c. Particulates (Cont.) Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total La-140 Ci <LLD <LLD <LLD <LLD <LLD Total for Period Ci <LLD <LLD <LLD <LLD <LLD D. Tritium Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ci 1.86E+OO 3.56E+OO 3.91 E+OO 3.70E+01 4.63E+01 E. Gross Alpha Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ci <LLD <LLD <LLD <LLD <LLD F. Carbon-14 Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ci <LLD <LLD <LLD <LLD <LLD 25 of 92

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TABLE 2A LIQUID EFFLUENTS- - SUMMATION OF ALL RELEASES UNIT 1 AND 2 Est. Total Unit 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Total Error%

A. Fission and Activation Products

1. Total Release Ci 5.16E-02 3.62E-02 4.03E-03 2.64E-04 9.22E-02 2.64E+OO I
2. Average Diluted Concentration µCi/ml 4.09E-09 3.12E-09 2.56E-10 1.85E-11 1.70E-09
3. Percent of applicable limit  % * * * * *
8. Tritium
1. Total Release Ci 3.74E+02 8.61E+02 3.25E+02 8.64E+02 2.42E+03 5.85E+OO I
2. Average Diluted Concentration µCi/ml 2.97E-05 7.41 E-05 2.06E-05 6.05E-05 4.47E-05
3.  % of Limit (1 E-2 µCi/ml)  % 2.97E-01 7.41 E-01 2.06E-01 6.05E-01 4.47E-01 C. Dissolved Noble Gases
1. Total Release Ci <LLD 1.76E-05 <LLD <LLD 1.76E-05 2.64E+OO I
2. Average Diluted Concentration µCi/ml N/A 1.51E-12 N/A N/A 3.24E*13
3. % of Limit (2E-4 µCi/ml)  % N/A 7.56E-07 N/A N/A 1.62E-07 D. Gross Alpha
11. Total Release Ci <LLD <LLD <LLD <LLD <LLD I1.47E+01 I E. Volume of Waste Released liters 1.01 E+ 10 8.86E+09 1.23E+ 10 8.42E+09 3.97E+ 10 rior to dilution IF. Volume of Dilution Water liters I I I 2.49E+oe I 2. 77E+oe I 3.4BE+oe 5.86E+oe 1.46E+1o I Note: ODCM LLD threshold values are included in Table 4.i of this report.
  • This limit is equal to 10 times the concentration values in Appendix B, Table 2, Column 2 to 10CFR20.1001-20.2402, except for Dissolved Noble Gases. The limits for Dissolved Noble Gases are found the Braidwood Station ODCM, Table C-6 of ODCM Appendix C for Noble Gases.

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TABLE 2B-1 LIQUID EFFLUENTS - CONTINUOUS MODE UNIT 1 AND 2 Nuclides Released Continuous Mode A. Fission and Activation Unit Quarter 1 Quarter 2 Quarter3 Quarter 4 Total Products Mn-54 Ci <LLD <LLD <LLD <LLD <LLD Fe-55 Ci <LLD <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD <LLD Total for Period Ci <LLD <LLD <LLD <LLD <LLD

8. Tritium Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ci 3.75E-01 6.80E+01 8.39E+OO 3.96E+01 1.16E+02
c. Dissolved and Entrained Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Gases Kr-87 Ci <LLD <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD <LLD Xe-133m Ci <LLD <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD <LLD Total

. for Period Ci <LLD <LLD <LLD

<LLD <LLD D. Gross Alpha Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ci <LLD <LLD <LLD <LLD <LLD 27 of 92

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TABLE 2B-2 LIQUID EFFLUENTS- BATCH MODE UNIT 1AND2 Nuclides Released Batch Mode A. Fission and Activation Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Products Cr-51 Ci 2.03E-03 3.24E-03 <LLD <LLD 5.27E-03 Mn-54 Ci 5.90E-04 3.6BE-04 7.9BE-06 <LLD 9.66E-04 Fe-55 Ci 2.30E-02 1.0BE-02 1.B3E-03 <LLD 3.56E-02 Fe-59 Ci 6.14E-05 4.26E-04 1.0BE-04 <LLD 5.95E-04 Co-57 Ci 9.B1 E-05 4.13E-05 <LLD <LLD 1.39E-04 Co-5B Ci 1.17E-02 1.12E-02 1.12E-03 1.06E-04 2.41 E-02 Co-60 Ci 1.05E-02 7.71 E-03 6.53E-04 1.39E-04 1.90E-02 Zn-65 Ci B.15E-05 <LLD <LLD <LLD B.15E-05 Zr-95 Ci 2.9BE-04 5.24E-05 7.15E-06 <LLD 3.57E-04 Nb-95 Ci 7.27E-04 3.37E-04 2.71 E-05 <LLD 1.09E-03 Nb-97 Ci 9.19E-04 7.06E-04 9.51 E-05 1.25E-05 1.73E-03 Ag-110m Ci 7.54E-04 6.67E-04 B.94E-05 7.50E-06 1.52E-03 Sn-113 Ci 1.63E-04 9.53E-05 3.70E-06 <LLD 2.62E-04 Sb-125 Ci 6.59E-04 6.46E-04 B.97E-05 <LLD 1.39E-03 Te-123m Ci <LLD <LLD 2.25E-06 <LLD 2.25E-06 Cs-134 Ci <LLD <LLD 1.11 E-06 <LLD 1.11 E-06 Cs-137 Ci <LLD <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD Ce-144 Ci 5.77E-05 <LLD <LLD <LLD 5.77E-05 Total for Period Ci 5.16E-02 3.62E-02 4.03E-03 2.64E-04 9.22E-02 B. Tritium Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ci 3.74E+02 7.93E+02 3.17E+02 B.25E+02 2.31 E+03

c. Dissolved and Entrained Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Gases Kr-B7 Ci <LLD <LLD <LLD <LLD <LLD Kr-BB Ci <LLD <LLD <LLD <LLD <LLD Xe-133 Ci <LLD 1.76E-05 <LLD <LLD 1.76E-05 Xe-133m Ci <LLD <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD <LLD Total for Period Ci <LLD 1.76E-05 <LLD <LLD 1.76E-05 2B of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

TABLE 2B-2 (Cont.)

LIQUID EFFLUENTS - BATCH MODE UNIT 1 AND 2 es Released Batch Mode D. Gross Alpha Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ci <LLD <LLD <LLD <LLD <LLD 29 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

APPENDIX B: SOLID WASTE AND IRRADIATED FUEL SHIPMENTS 30 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

A. Solid Waste Shipped Offsite for Burial or Disposal (Not Irradiated Fuel)

Total Quantity Total Activity Est. Total

1. Types of Waste (m3) Period (Ci) Error%
a. Spent resins, filter sludges, evaporator bottoms, etc. 2.09E+02 1.09E+02 Jan - Dec 2017 25
b. Dry compressible waste, contaminated equip, etc. 3.25E+02 1.12E+OO Jan - Dec 2017 25
c. Irradiated components, control rods, etc. O.OOE+OO O.OOE+OO Jan - Dec 2017 25
d. Other (oil, reverse osmosis reject water, soil, lagoon 1.46E+01 7.88E-01 Jan - Dec 2017 25 sediment)
2. Estimate of Major Nuclide Composition (By Waste Type and Class)
a. Category A - Spent Resins, Filter Sludges, Evaporator Bottoms, etc.

Waste Class Percent Waste Class Percent Isotope A Curies Abundance C Curies Abundance H-3 1.27E+01 23.61% 8.64E+OO 15.88%

C-14 2.27E+OO 4.22% 7.35E-02 0.14%

Cr-51 3.28E-02 0.06% 5.19E-03 0.01%

Mn-54 1.32E+OO 2.45% 3.71 E-01 0.68%

Fe-55 4.74E+OO 8.78% 1.75E+01 32.17%

Fe-59 2.99E-03 0.01% 1.41 E-03 0.00%

Co-58 4.58E+OO 8.48% 2.31 E-01 0.42%

Co-60 9.36E+OO 17.35% 6.64E+OO 12.21%

Ni-59 3.68E-01 0.68% 1.82E-01 0.33%

Ni-63 1.63E+01 30.18% 1.97E+01 36.22%

Zn-65 4.88E-01 0.91% 9.81 E-03 0.02%

Sr-90 1.62E-02 0.03% 9.30E-03 0.02%

Zr-95 5.43E-03 0.01% 2.31 E-02 0.04%

Nb-94 O.OOE+OO 0.00% 5.97E-03 0.01%

Nb-95 7.03E-02 0.13% 4.75E-02 0.09%

Tc-99 8.36E-03 0.02% 5.14E-02 0.09%

Ag-110m 2.89E-02 0.05% 2.14E-02 0.04%

Sb-124 2.89E-04 0.00% 4.81 E-04 0.00%

Sb-125 5.11 E-01 0.95% 1.57E-01 0.29%

1-129 O.OOE+OO 0.00% 4.76E-05 0.00%

Cs-137 8.47E-01 1.57% 5.31 E-01 0.98%

Ce-144 1.09E-02 0.02% 1.32E-02 0.02%

Pu-238 1.18E-04 0.00% 1.91 E-03 0.00%

Pu-239 1.04E-05 0.00% 5.66E-04 0.00%

Pu-241 1.40E-02 0.03% 1.40E-01 0.26%

Am-241 1.07E-05 0.00% 1.37E-03 0.00%

Cm-242 1.91 E-07 0.00% 1.93E-05 0.00%

Cm-243 1.34E-04 0.00% 3.40E-03 0.01%

Cm-244 2.23E-05 0.00% 6.28E-06 0.00%

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b. Category B - Dry Compressible Waste, Contaminated Equip, etc.

Waste Class Percent Waste Class Percent Isotope A Curies Abundance C Curies Abundance H-3 1.04E-01 9.30% O.OOE+OO 0.00%

C-14 O.OOE+OO 0.00% O.OOE+OO 0.00%

Cr-51 1.14E-02 1.02% O.OOE+OO 0.00%

Mn-54 1.32E-02 1.18% O.OOE+OO 0.00%

Fe-55 3.06E-01 27.33% O.OOE+OO 0.00%

Co-58 1.55E-01 13.83% O.OOE+OO 0.00%

Co-60 2.03E-01 18.19% O.OOE+OO 0.00%

Ni-59 1.69E-03 0.15% O.OOE+OO 0.00%

Ni-63 2.55E-01 22.79% O.OOE+OO 0.00%

Sr-90 6.35E-04 0.06% O.OOE+OO 0.00%

Zr-95 1.55E-02 1.39% O.OOE+OO 0.00%

Nb-95 2.60E-02 2.32% O.OOE+OO 0.00%

Tc-99 7.44E-04 0.07% O.OOE+OO 0.00%

Sb-125 1.04E-02 0.93% O.OOE+OO 0.00%

1-129 O.OOE+OO 0.00% O.OOE+OO 0.00%

Cs-137 3.21 E-03 0.29% O.OOE+OO 0.00%

Pu-238 1.20E-05 0.00% O.OOE+OO 0.00%

Pu-241 2.47E-04 0.02% O.OOE+OO 0.00%

Am-241 1.61 E-05 0.00% O.OOE+OO 0.00%

Cm-242 2.47E-06 0.00% O.OOE+OO 0.00%

Cm-243 2.60E-05 0.00% O.OOE+OO 0.00%

Cm-244 3.19E-05 0.00% O.OOE+OO 0.00%

c. Category C - Irradiated Components, Control Rods, etc.

Waste Class Percent Waste Class Percent Isotope A Curies Abundance C Curies Abundance None N/A N/A N/A N/A

d. Category D - Other (Oil, Reverse Osmosis Reject Water, Soil, Lagoon Sediment)

Waste Class Percent Waste Class Percent Isotope A Curies Abundance C Curies Abundance H-3 7.61 E-01 96.57% O.OOE+OO 0.00%

C-14 O.OOE+OO 0.00% O.OOE+OO 0.00%

Cr-51 2.77E-04 0.04% 3.69E-16 0.00%

Mn-54 3.54E-04 0.04% 1.91 E-08 0.00%

Fe-55 8.54E-03 1.08% O.OOE+OO 0.00%

Co-58 4.48E-03 0.57% 2.28E-11 0.00%

Co-60 5.49E-03 0.70% 2.32E-05 5.44%

Ni-59 3.53E-05 0.00% O.OOE+OO 0.00%

Ni-63 5.92E-03 0.75% O.OOE+OO 0.00%

Sr-90 1.78E-05 0.00% 5.25E-07 0.12%

Zr-95 4.39E-04 0.06% O.OOE+OO 0.00%

1-129 O.OOE+OO 0.00% O.OOE+OO 0.00%

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Isotope Waste Class Percent Waste Class Percent (cont.) A Curies Abundance C Curies Abundance Cs-137 6.22E-05 0.01% 1.90E-04 44.45%

Pu-238 2.82E-07 0.00% O.OOE+OO 0.00%

Pu-241 O.OOE+OO 0.00% O.OOE+OO 0.00%

Am-241 4.51 E-07 0.00% 5.99E-05 14.04%

Cm-242 O.OOE+OO 0.00% O.OOE+OO 0.00%

Cm-243 8.19E-07 0.00% O.OOE+OO 0.00%

Cm-244 8.18E-07 0.00% O.OOE+OO 0.00%

3. Solid Waste Disposition Number of Mode of Transportation Destination Shipments Energy Solutions-Bear Creek Facility 1 CAST Transportation 1560 Bear Creek Road Energy Solutions Services - Gallaher Rd 5 Hittman Transportation 628 Gallaher Rd.

Energy Solutions-Bear Creek Facility 9 Hittman Transportation 1560 Bear Creek Road EnergySolutions LLC.

7 Hittman Transportation Clive Disposal Site - Containerized Waste Facility EnergySolutions, LLC (Treatment Facility) 6 Hittman Transportation Clive Disposal Site - Treatment Facility Waste Control Specialists LLC 2 Hittman Transportation Compact Waste Disposal Facility Energy Solutions Services - Gallaher Rd 1 Visionary Solutions, LLC 628 Gallaher Rd B. Irradiated Fuel Shipments

1. None C. Irradiated Fuel Shipments (disposition)

No irradiated fuel shipments were dispositioned at Braidwood during January through December 2017.

D. Changes to the Process Control Program (PCP)

Revision 12 of the Process Control Program, RW-AA-100 was implemented September 29, 2017. These were administrative changes made to include references for Nine Mile Point and Fitzpatrick stations, while removing Ft. Calhoun. The changes maintain the overall conformance of solidified waste product to the existing criteria for solid wastes and were reviewed and found acceptable by onsite review.

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APPENDIX C: WIND DIRECTION AND STABILITY CLASSES 34 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 0 0 0 1 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 1 0 0 0 0 1 ESE 0 0 2 0 0 0 2 SE 0 0 2 2 0 0 4 SSE 0 0 1 1 0 0 2 s 0 0 1 0 0 0 1 SSW 0 1 4 0 0 0 5 SW 0 1 1 0 1 0 3 WSW 0 0 2 0 0 0 2 w 0 2 4 6 1 5 18 WNW 0 2 17 6 0 0 25 NW 0 1 22 0 0 0 23 NNW 0 0 9 1 0 0 10 Variable 0 0 0 0 0 0 0 Total 0 8 66 16 2 5 97 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 35 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Moderately Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 0 0 0 0 1 NNE 0 0 0 0 0 0 0 NE 0 1 0 0 0 0 1 ENE 0 2 1 0 0 0 3 E 0 2 0 0 0 0 2 ESE 0 0 1 0 0 0 1 SE 0 0 1 0 0 0 1 SSE 0 0 3 1 0 0 4 s 0 1 0 0 0 0 1 SSW 0 0 2 0 1 0 3 SW 0 0 1 1 1 0 3 WSW 0 1 0 1 0 0 2 w 0 0 1 2 1 0 4 WNW 0 2 8 4 0 0 14 NW 0 0 3 1 0 0 4 NNW 0 2 3 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 0 12 24 10 3 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: 3 36 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 1 0 0 0 3 NNE 0 0 0 0 0 0 0 NE 0 1 0 0 0 0 1 ENE 0 1 0 0 0 0 1 E 0 3 0 0 0 0 3 ESE 0 3 0 0 0 0 3 SE 0 4 3 0 0 0 7 SSE 0 1 10 0 0 0 11 s 0 1 2 1 0 0 4 SSW 0 4 4 0 2 0 10 SW 0 2 3 2 0 0 7 WSW 0 3 3 0 0 0 6 w 0 0 3 2 0 0 5 WNW 0 1 4 3 0 0 8 NW 0 2 2 2 0 0 6 NNW 0 1 0 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 29 35 10 2 0 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: 3 37 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record; January - March 2017 Stability Class - Neutral - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 14 28 0 0 0 43 NNE 4 18 11 0 0 0 33 NE 7 14 13 0 0 0 34 ENE 5 16 17 0 0 0 38 E 4 8 5 0 0 0 17 ESE 2 10 2 0 0 0 14 SE 2 10 7 0 0 0 19 SSE 0 9 25 1 0 0 35 s 0 12 33 42 5 0 92 SSW 0 8 9 25 4 0 46 SW 0 5 27 15 4 0 51 WSW 1 6 4 13 0 0 24 w 1 14 20 30 4 0 69 WNW 4 23 85 25 2 0 139 NW 1 43 23 3 0 0 70 NNW 3 22 23 4 0 0 52 Variable 0 0 0 0 0 0 0 Total 35 232 332 158 19 0 776 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: 3 38 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Slightly Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 13 10 0 0 0 26 NNE 18 25 13 1 0 0 57 NE 4 28 25 0 0 0 57 ENE 16 46 22 0 0 0 84 E 23 29 10 0 0 0 62 ESE 7 32 11 1 0 0 51 SE 4 32 27 1 0 0 64 SSE 0 28 27 0 0 0 55 s 1 33 28 2 4 0 68 SSW 1 10 19 1 2 0 33 SW 0 22 52 9 1 1 85 WSW 1 18 20 0 0 0 39 w 9 25 28 9 3 0 74 WNW 17 59 39 3 0 0 118 NW 14 52 7 0 0 0 73 NNW 6 33 10 0 0 0 49 Variable 0 0 0 0 0 0 0 Total 124 485 348 27 10 1 995 Hours of calm in this stability class: 3 Hours of missing wind measurements in this stability class: 12 Hours of missing stability measurements in all stability classes: 3 39 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F}

Winds Measured at 34 Feet Wind Speed (in mph}

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

\

N 3 1 0 0 0 0 4 NNE 2 0 0 0 0 0 2 NE 2 0 0 0 0 0 2 ENE 4 0 0 0 0 0 4 E 1 2 0 0 0 0 3 ESE 4 5 0 0 0 0 9 SE 0 1 0 0 0 0 1 SSE 1 0 0 0 0 0 1 s 0 1 0 0 0 0 1 SSW 1 3 4 0 0 0 8 SW 5 2 2 0 0 0 9 WSW 1 13 0 0 0 0 14 w 11 14 1 0 0 0 26 WNW 10 5 1 0 0 0 16 NW 8 0 0 0 0 0 8 NNW 5 1 0 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 58 48 8 0 0 0 114 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 40 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 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 0 0 0 0 0 0 NE 1 0 0 0 0 0 1 ENE 1 0 0 0 0 0 1 E 0 1 0 0 0 0 1 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 1 0 0 0 0 0 1 s 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 4 0 0 0 0 0 4 WSW 3 2 0 0 0 0 5 w 3 3 0 0 0 0 6 WNW 6 0 0 0 0 0 6 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 20 6 0 0 0 0 26 Hours of calm in this stability class: 3 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 41 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 0 0 0 1 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 1 0 2 0 3 SE 0 0 0 0 3 1 4 SSE 0 0 0 2 0 0 2 s 0 0 1 1 0 0 2 SSW 0 1 0 2 0 0 3 SW 0 0 2 1 0 1 4 WSW 0 0 2 0 0 0 2 w 0 0 3 1 3 9 16 WNW 0 1 6 13 6 0 26 NW 0 0 7 17 1 0 25 NNW 0 0 1 7 1 0 9 Variable 0 0 0 0 0 0 0 Total 0 2 24 44 16 11 97 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 42 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Moderately Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 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 2 0 0 0 2 E 0 1 3 0 0 0 4 ESE 0 0 0 0 1 0 1 SE 0 0 0 1 0 0 1 SSE 0 0 2 1 1 0 4 s 0 0 1 0 0 0 1 SSW 0 1 1 1 0 1 4 SW 0 0 1 0 1 1 3 WSW 0 0 0 0 1 0 1 w 0 0 2 0 1 2 5 WNW 0 0 3 4 4 0 11 NW 0 0 2 4 0 1 7 NNW 0 0 1 3 0 0 4 Variable 0 0 0 0 0 0 0 Total 0 2 19 14 9 5 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: 3 43 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 2 0 0 0 2 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 1 0 0 0 0 1 E 0 0 2 1 0 0 3 ESE 0 1 1 0 0 0 2 SE 0 1 3 1 1 0 6 SSE 0 2 4 7 0 0 13 s 0 0 4 1 1 0 6 SSW 0 2 5 2 0 2 11 SW 0 1 1 3 0 0 5 WSW 0 2 4 0 0 0 6 w 0 0 3 0 1 1 5 WNW 0 1 1 3 2 1 8 NW 0 0 2 2 0 2 6 NNW 0 0 2 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 0 11 34 20 5 6 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: 3 44 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Neutral - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 3 20 15 0 0 40 NNE 0 4 16 6 0 0 26 NE 3 7 15 7 0 0 32 ENE 4 7 9 12 1 0 33 E 5 2 10 5 0 0 22 ESE 1 1 9 4 2 0 17 SE 0 1 6 9 0 0 16 SSE 1 4 7 18 6 0 36 s 0 3 12 19 37 22 93 SSW 0 6 7 9 17 14 53 SW 0 1 13 15 10 4 43 WSW 1 3 5 4 13 0 26 w 0 4 11 14 17 7 53 WNW 1 2 17 63 38 13 134 NW 1 3 24 40 13 6 87 NNW 2 6 20 15 6 0 49 Variable 0 0 0 0 0 0 0 Total 21 57 201 255 160 66 760 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: 3 45 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Slightly Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 12 10 0 0 26 NNE 3 9 28 11 1 0 52 NE 0 10 24 26 0 0 60 ENE 3 15 35 16 0 0 69 E 3 12 28 11 4 1 59 ESE 3 8 31 19 6 1 68 SE 1 4 24 28 9 0 66 SSE 0 2 19 30 8 0 59 s 0 1 14 28 9 3 55 SSW 0 0 23 20 10 4 57 SW 0 3 18 25 15 3 64 WSW 0 4 15 26 4 0 49 w 2 4 13 40 2 5 66 WNW 2 2 37 39 5 6 91 NW 1 7 40 42 10 0 100 NNW 1 8 32 13 0 0 54 Variable 0 0 0 0 0 0 0 Total 19 93 393 384 83 23 995 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 15 Hours of missing stability measurements in all stability classes: 3 46 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 2 7 0 0 0 10 NNE 0 2 3 0 0 0 5 NE 0 0 2 0 0 0 2 ENE 1 1 1 0 0 0 3 E 0 1 1 0 0 0 2 ESE 0 0 1 0 0 0 1 SE 1 0 4 4 0 0 9 SSE 0 0 1 0 0 0 1 s 0 0 0 0 0 0 0 SSW 0 0 0 1 0 0 1 SW 0 1 3 4 2 0 10 WSW 1 3 7 3 0 0 14 w 0 1 8 3 0 0 12 WNW 2 1 13 5 1 0 22 NW 0 6 8 2 0 0 16 NNW 0 3 4 0 0 0 7 Variable 0 0 0 0 0 0 0 Total 6 21 63 22 3 0 115 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 47 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 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 1 0 0 0 1 NE 1 0 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 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 0 0 0 SSW 0 0 0 0 0 0 0 SW 1 2 0 0 0 0 3 WSW 2 0 1 1 0 0 4 w 0 1 3 0 0 0 4 WNW 2 2 3 0 0 0 7 NW 0 1 4 1 0 0 6 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 6 7 13 3 0 0 29 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 48 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 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 1 5 0 0 0 6 NE 0 0 1 0 0 0 1 ENE 0 0 0 0 0 0 0 E 0 3 0 0 0 0 3 ESE 0 1 0 0 0 0 1 SE 0 0 1 0 0 0 1 SSE 0 1 0 0 0 0 1 s 0 2 5 3 0 0 10 SSW 0 0 7 11 2 0 20 SW 0 1 6 4 0 0 11 WSW 0 0 7 4 0 0 11 w 0 1 19 7 0 0 27 WNW 0 3 7 0 0 0 10 NW 0 2 3 0 0 0 5 NNW 0 0 4 2 0 0 6 Variable 0 0 0 0 0 0 0 Total 0 15 65 33 2 0 115 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 16 49 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Moderately Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 3 0 0 3 NNE 0 0 3 1 0 0 4 NE 0 1 5 0 0 0 6 ENE 0 0 0 0 0 0 0 E 0 3 0 0 0 0 3 ESE 0 5 0 0 0 0 5 SE 0 1 1 0 0 0 2 SSE 0 1 0 1 0 0 2 s 0 1 2 3 0 0 6 SSW 0 0 1 1 0 0 2 SW 0 2 6 5 0 0 13 WSW 0 0 5 2 1 0 8 w 0 4 14 2 0 0 20 WNW 0 1 3 0 0 0 4 NW 0 1 0 0 0 0 1 NNW 0 1 9 0 0 0 10 Variable 0 0 0 0 0 0 0 Total 0 21 49 18 1 0 89 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: 16 50 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 4 1 0 0 5 NNE 1 1 3 0 0 0 5 NE 0 2 3 1 0 0 6 ENE 0 0 0 0 0 0 0 E 1 4 0 0 0 0 5 ESE 0 2 0 0 0 0 2 SE 0 2 5 0 0 0 7 SSE 0 2 0 0 0 0 2 s 1 3 4 3 0 0 11 SSW 0 0 3 6 0 0 9 SW 0 0 4 3 2 0 9 WSW 0 1 6 2 0 0 9 w 0 3 8 1 0 0 12 WNW 0 2 7 1 0 0 10 NW 0 4 2 0 0 0 6 NNW 0 1 3 1 0 0 5 Variable 0 0 0 0 0 0 0 Total 3 27 52 19 2 0 103 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: 16 51 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Neutral - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 10 8 3 0 0 21 NNE 2 16 20 6 0 0 44 NE 5 14 28 4 0 0 51 ENE 3 14 5 0 0 0 22 E 4 24 1 0 0 0 29 ESE 5 15 2 0 0 0 22 SE 5 15 8 0 0 0 28 SSE 1 13 11 0 0 0 25 s 3 5 5 12 2 0 27 SSW 3 6 8 9 9 0 35 SW 0 5 15 15 6 0 41 WSW 1 11 13 8 0 0 33 w 1 20 40 15 0 0 76 WNW 4 13 17 2 0 0 36 NW 2 21 3 1 0 0 27 NNW 3 7 9 6 0 0 25 Variable 0 0 0 0 0 0 0 Total 42 209 193 81 17 0 542 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 16 52 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Slightly Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 9 23 5 6 0 0 43 NNE 5 34 13 9 0 0 61 NE 17 43 36 10 1 0 107 ENE 19 56 18 0 0 0 93 E 14 39 1 0 0 0 54 ESE 6 22 1 1 0 0 30 SE 8 27 6 0 0 0 41 SSE 3 30 19 0 0 0 52 s 4 22 53 21 4 0 104 SSW 0 9 58 31 5 0 103 SW 0 26 37 16 0 0 79 WSW 4 21 15 10 0 0 so w 6 22 16 5 0 0 49 WNW 4 17 24 1 0 0 46 NW 6 13 4 0 0 0 23 NNW 8 9 9 1 0 0 27 Variable 0 0 0 0 0 0 0 Total 113 413 315 111 10 0 962 Hours of calm in this stability class: 1 Bours of missing wind measurements in this stability class: 8 Hours of missing stability measurements in all stability classes: 16 53 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 1 0 0 0 0 5 NNE 6 2 0 0 0 0 8 NE 10 1 0 0 0 0 11 ENE 20 0 0 0 0 0 20 E 19 3 0 0 0 0 22 ESE 14 10 0 0 0 0 24 SE 2 2 0 0 0 0 4 SSE 4 9 0 0 0 0 13 s 1 4 0 0 0 0 5 SSW 4 3 2 0 0 0 9 SW 0 8 0 0 0 0 8 WSW 11 39 0 0 0 0 50 w 10 8 0 0 0 0 18 WNW 7 2 0 0 0 0 9 NW 7 4 0 0 0 0 11 NNW 5 2 1 0 0 0 8 Variable 0 0 0 0 0 0 0 Total 124 98 3 0 0 0 225 Hours of calm in this stability class: 4 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability classes: 16 54 bf 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 9 0 0 0 0 0 9 NNE 3 0 0 0 0 0 3 NE 4 0 0 0 0 0 4 ENE 1 0 0 0 0 0 1 E 12 1 0 0 0 0 13 ESE 9 0 0 0 0 0 9 SE 4 0 0 0 0 0 4 SSE 1 0 0 0 0 0 1 s 2 0 0 0 0 0 2 SSW 1 1 0 0 0 0 2 SW 2 0 0 0 0 0 2 WSW 6 9 0 0 0 0 15 w 17 0 0 0 0 0 17 WNW 10 0 0 0 0 0 10 NW 0 0 0 0 0 0 0 NNW 4 0 0 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 85 11 0 0 0 0 96 Hours of calm in this stability class: 18 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 16 55 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 1 0 1 NNE 0 1 0 0 1 0 2 NE 0 0 0 6 0 0 6 ENE 0 0 0 0 0 0 0 E 0 1 0 0 0 0 1 ESE 0 3 0 0 0 0 3 SE 0 0 1 0 0 0 1 SSE 0 0 0 0 0 0 0 s 0 0 6 1 2 0 9 SSW 0 0 3 1 7 4 15 SW 0 0 4 9 3 0 16 WSW 0 0 2 2 2 0 6 w 0 0 0 11 6 0 17 WNW 0 1 4 11 8 1 25 NW 0 0 3 3 0 0 6 NNW 0 0 3 2 2 0 7 Variable 0 0 0 0 0 0 0 Total 0 6 26 46 32 5 115 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 16 56 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73}

Period of Record: April - June 2017 Stability Class - Moderately Unstable. - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 1 0 0 2 NNE 0 0 0 0 3 0 3 NE 0 1 1 7 1 0 10 ENE 0 1 0 0 0 0 1 E 0 0 1 0 0 0 1 ESE 0 2 4 0 0 0 6 SE 0 0 2 0 0 0 2 SSE 0 1 1 0 1 0 3 s 0 0 1 2 2 0 5 SSW 0 0 0 0 2 0 2 SW 0 1 2 9 1 0 13 WSW 0 0 0 3 0 0 3 w 0 0 1 9 1 2 13 WNW 0 1 3 7 3 0 14 NW 0 0 0 2 0 0 2 NNW 0 0 4 5 0 0 9 Variable 0 0 0 0 0 0 0 Total 0 7 21 45 14 2 89 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: 16 57 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 1 5 1 0 8 NNE 0 0 1 2 0 0 3 NE 0 0 2 2 1 0 5 ENE 0 1 0 1 0 0 2 E 0 0 3 0 0 0 3 ESE 0 2 1 0 0 0 3 SE 0 0 5 2 0 0 7 SSE 0 1 1 0 0 0 2 s 0 0 4 3 2 0 9 SSW 0 0 2 1 1 4 8 SW 0 0 1 5 3 3 12 WSW 0 1 2 2 0 0 5 w 0 2 1 3 3 0 9 WNW 0 1 0 11 2 0 14 NW 0 1 4 1 2 0 8 NNW 0 0 4 0 1 0 5 Variable 0 . 0 0 0 0 0 0 Total 0 10 32 38 16 7 103 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: 16 58 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Neutral - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 8 7 2 1 0 19 NNE 0 5 22 8 3 0 38 NE 1 8 8 22 12 0 51 ENE 3 11 7 6 1 0 28 E 2 16 12 1 1 0 32 ESE 2 7 9 7 0 0 25 SE 0 12 11 6 0 0 29 SSE 3 8 9 5 1 0 26 s 1 4 6 3 6 4 24 SSW 1 4 2 5 7 16 35 SW 0 4 5 12 10 8 39 WSW 1 5 7 5 7 0 25 w 0 4 16 24 11 0 55 WNW 1 5 14 20 19 1 60 NW 0 12 11 10 1 1 35 NNW 0 6 3 8 6 0 23 Variable 0 0 0 0 0 0 0 Total 16 119 149 144 86 30 544 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: 16 59 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Slightly Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 5 9 3 3 3 26 NNE 0 8 23 18 8 0 57 NE 1 14 37 30 12 5 99 ENE 0 22 32 28 3 0 85 E 2 21 48 15 1 0 87 ESE 0 4 11 11 0 0 26 SE 0 5 14 18 2 0 39 SSE 2 5 15 18 3 0 43 s 1 2 18 33 21 8 83 SSW 0 1 9 54 40 22 126 SW 1 1 27 43 13 4 89 WSW 0 1 29 11 5 1 47 w 0 4 16 15 8 1 44 WNW 1 9 16 25 3 1 55 NW 0 4 6 19 7 1 37 NNW 0 10 6 9 3 0 28 Variable 0 0 0 0 0 0 0 Total 11 116 316 350 132 46 971 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: 16 60 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F}

Winds Measured at 203 Feet Wind Speed (in mph}

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 6 6 0 0 0 13 NNE 0 0 3 0 0 0 3 NE 0 2 6 2 0 0 10 ENE 3 3 10 0 0 0 16 E 2 3 11 0 0 0 16 ESE 0 0 17 9 0 0 26 SE 0 2 7 3 0 0 12 SSE 1 2 2 2 0 0 7 s 1 8 5 4 0 0 18 SSW 0 1 2 1 0 0 4 SW 1 3 2 5 0 0 11 WSW 1 1 12 4 0 0 18 w 1 0 31 12 0 0 44 WNW 0 2 9 5 0 0 16 NW 0 2 5 1 0 0 8 NNW 1 2 6 1 0 0 10 Variable 0 0 0 0 0 0 0 Total 12 37 134 49 0 0 232 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: 16 61of92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 1 5 0 0 0 7 NNE 5 2 2 0 0 0 9 NE 0 7 1 1 0 0 9 ENE 2 3 0 0 0 0 5 E 0 2 3 5 0 0 10 ESE 1 1 1 2 0 0 5 SE 0 2 4 1 0 0 7 SSE 0 4 0 0 0 0 4 s 0 0 2 0 0 0 2 SSW 2 1 0 0 0 0 3 SW 1 5 1 0 0 0 7 WSW 2 2 1 3 0 0 8 w 1 1 5 6 0 0 13 WNW 0 2 6 0 0 0 8 NW 0 2 10 0 0 0 12 NNW 0 2 3 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 15 37 44 18 0 0 114 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: 16 62 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT i, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F}

Winds Measured at 34 Feet Wind Speed (in mph}

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 3 6 0 0 0 10 NNE 0 3 2 0 0 0 5 NE 1 12 14 0 0 0 27 ENE 2 12 1 0 0 0 15 E 3 19 0 0 0 0 22 ESE 2 10 0 0 0 0 12 SE 1 19 1 0 0 0 21 SSE 3 25 3 0 0 0 31 s 0 15 9 0 0 0 24 SSW 0 11 14 0 0 0 25 SW 0 4 10 2 0 0 16 WSW 1 10 12 4 0 0 27 w 1 26 22 0 0 0 49 WNW 5 18 8 0 0 0 31 NW 0 20 8 0 0 0 28 NNW 0 16 6 0 0 0 22 Variable 0 0 0 0 0 0 0 Total 20 223 116 6 0 0 365 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 63 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Moderately Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 2 1 0 0 0 4 NNE 0 2 9 0 0 0 11 NE 1 1 6 0 0 0 8 ENE 1 2 0 0 0 0 3 E 2 4 0 0 0 0 6 ESE 2 6 0 0 0 0 8 SE 0 2 1 0 0 0 3 SSE 1 12 0 0 0 0 13 s 2 3 1 0 0 0 6 SSW 1 3 1 0 0 0 5 SW 0 2 0 1 0 0 3 WSW 1 6 2 0 0 0 9 w 0 9 4 0 0 0 13 WNW 2 6 2 0 0 0 10 NW 0 12 0 0 0 0 12 NNW 1 3 0 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 15 75 27 1 0 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: 3 64 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72,-73)

Period of Record: July - September 2017 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 4 2 0 0 0 8 NNE 2 7 5 0 0 0 14 NE 2 8 0 0 0 0 10 ENE 1 1 0 0 0 0 2 E 5 4 0 0 0 0 9 ESE 3 2 0 0 0 0 5 SE 2 6 0 0 0 0 8 SSE 0 8 0 0 0 0 8 s 2 2 0 0 0 0 4 SSW 1 2 1 0 0 0 4 SW 1 3 1 0 0 0 5 WSW 0 3 4 0 0 0 7 w 3 7 7 0 0 0 17 WNW 2 1 0 0 0 0 3 NW 1 4 1 0 0 0 6 NNW 2 7 1 0 0 0 10 Variable 0 0 0 0 0 0 0 Total 29 69 22 0 0 0 120 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: 3 65 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Neutral - 199Ft-30Ft Delta-T ( F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 8 3 0 0 0 15 NNE 12 10 12 0 0 0 34 NE 11 26 8 0 0 0 45 ENE 17 10 0 0 0 0 27 E 10 8 0 0 0 0 18 ESE 10 10 0 0 0 0 20 SE 9 18 1 0 0 0 28 SSE 2 17 3 0 0 0 22 s 2 8 8 0 0 0 18 SSW 1 5 8 3 0 0 17 SW 3 7 10 0 0 0 20 WSW 2 25 8 0 0 0 35 w 6 20 10 0 0 0 36 WNW 4 10 0 0 0 0 14 NW 3 18 4 0 0 0 25 NNW 4 18 4 0 0 0 26 Variable 0 0 0 0 0 0 0 Total 100 218 79 3 0 0 400 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 66 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Slightly Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 15 17 0 0 0 0 32 NNE 12 30 4 0 0 0 46 NE 28 29 0 0 0 0 57 ENE 40 16 0 0 0 0 56 E 39 7 0 0 0 0 46 ESE 20 29 0 0 0 0 49 SE 13 40 1 0 0 0 54 SSE 16 43 0 0 0 0 59 s 3 21 11 0 0 0 35 SSW 1 18 18 1 0 0 38 SW 4 24 11 1 0 0 40 WSW 13 32 5 0 0 0 50 w 16 21 5 0 0 0 42 WNW 22 10 0 0 0 0 32 NW 14 7 0 0 0 0 21 NNW 13 16 0 0 0 0 29 Variable 0 0 0 0 0 0 0 Total 269 360 55 2 0 0 686 Hours of calm in this stability class: 9 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 67 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 20 2 0 0 0 0 22 NNE 13 2 0 0 0 0 15 NE 20 0 0 0 0 0 20 ENE 32 0 0 0 0 0 32 E 42 1 0 0 0 0 43 ESE 27 6 0 0 0 0 33 SE 18 18 0 0 0 0 36 SSE 5 7 0 0 0 0 12 s 9 6 0 0 0 0 15 SSW 5 6 0 0 0 0 11 SW 7 9 0 0 0 0 16 WSW 15 16 0 0 0 0 31 w 34 4 0 0 0 0 38 WNW 18 0 0 0 0 0 18 NW 10 0 0 0 0 0 10 NNW 4 0 0 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 279 77 0 0 0 0 356 Hours of calm in this stability class: 11 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 68 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 0 0 0 0 0 5 NNE 7 0 0 0 0 0 7 NE 9 0 0 0 0 0 9 ENE 11 0 0 0 0 0 11 E 10 0 0 0 0 0 10 ESE 5 1 0 0 0 0 6 SE 1 0 0 0 0 0 1 SSE 0 0 0 0 0 0 0 s 1 0 0 0 0 0 1 SSW 1 0 0 0 0 0 1 SW 5 1 0 0 0 0 6 WSW 10 3 0 0 0 0 13 w 25 0 0 0 0 0 25 WNW 13 0 0 0 0 0 13 NW 6 0 0 0 0 0 6 NNW 5 1 0 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 114 6 0 0 0 0 120 Hours of calm in this stability class: 20 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 69 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 6 5 0 0 12 NNE 1 1 2 0 0 0 4 NE 1 6 8 6 0 0 21 ENE 2 8 5 3 0 0 18 E 1 15 10 0 0 0 26 ESE 2 8 3 1 0 0 14 SE 0 14 6 2 0 0 22 SSE 2 18 11 1 0 0 32 s 0 8 8 3 0 0 19 SSW 1 2 21 5 0 0 29 SW 0 4 4 9 0 0 17 WSW 0 5 6 0 3 0 14 w 0 12 13 11 2 0 38 WNW 0 16 20 10 0 0 46 NW 0 6 14 2 1 0 23 NNW 0 6 20 4 0 0 30 Variable 0 0 0 0 0 0 0 Total 10 130 157 62 6 0 365 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 70 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Moderately Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 1 2 0 0 0 4 NNE 0 0 0 3 0 0 3 NE 1 3 4 6 0 0 14 ENE 1 0 2 1 0 0 4 E 2 6 0 0 0 0 8 ESE 0 3 1 0 0 0 4 SE 1 5 0 1 0 0 7 SSE 2 9 2 0 0 0 13 s 0 3 0 0 0 0 3 SSW 1 3 3 1 0 0 8 SW 0 2 0 1 0 0 3 WSW 0 4 4 0 0 0 8 w 0 5 5 2 0 0 12 WNW 0 3 2 1 0 0 6 NW 0 7 4 2 0 0 13 NNW 0 5 3 0 0 0 8 Variable 0 0 0 0 0 0 0 Total 9 59 32 18 0 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: 3 71 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 4 0 0 0 8 NNE 0 3 6 2 0 0 11 NE 6 3 3 2 0 0 14 ENE 2 2 0 0 0 0 4 E 2 4 0 0 0 0 6 ESE 3 5 1 0 0 0 9 SE 2 4 1 0 0 0 7 SSE 1 5 2 0 0 0 8 s 1 2 2 0 0 0 5 SSW 0 2 0 1 0 0 3 SW 0 2 1 1 0 0 4 WSW 1 0 3 0 0 0 4 w 0 5 2 5 0 0 12 WNW 0 2 4 2 0 0 8 NW 0 2 0 3 0 0 5 NNW 2 6 4 0 0 0 12 Variable 0 0 0 0 0 0 0 Total 20 51 33 16 0 0 120 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: 3 72 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Neutral - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 6 8 0 0 0 16 NNE 5 7 7 4 0 0 23 NE 5 12 12 15 0 0 44 ENE 5 16 10 1 0 0 32 E 6 10 6 0 0 0 22 ESE 5 10 8 0 0 0 23 SE 1 11 12 1 0 0 25 SSE 1 6 17 3 0 0 27 s 2 3 7 8 0 0 20 SSW 0 5 4 5 2 0 16 SW 1 3 6 9 1 0 20 WSW 1 10 12 2 0 0 25 w 0 14 9 4 1 0 28 WNW 3 4 8 5 3 0 23 NW 2 4 11 12 0 0 29 NNW 1 10 12 4 0 0 27 Variable 0 0 0 0 0 0 0 Total 40 131 149 73 7 0 400 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 73 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Slightly Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 11 20 1 0 0 34 NNE 1 7 21 8 0 0 37 NE 0 11 28 10 0 0 49 ENE 1 25 34 1 0 0 61 E 0 17 30 0 0 0 47 ESE 1 6 19 4 0 0 30 SE 3 8 39 14 0 0 64 SSE 0 8 33 10 0 0 51 s 1 6 30 8 1 0 46 SSW 1 6 24 20 4 0 55 SW 1 7 15 13 2 1 39 WSW 5 12 26 4 2 0 49 w 1 4 26 12 0 0 43 WNW 1 6 16 7 0 0 30 NW 0 11 15 3 0 0 29 NNW 2 5 22 2 0 0 31 Variable 0 0 0 0 0 0 0 Total 20 150 398 117 9 1 695 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 74 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 3 5 0 0 0 9 NNE 0 7 9 2 0 0 18 NE 1 1 19 0 0 0 21 ENE 3 12 6 2 0 0 23 E 0 7 21 0 0 0 28 ESE 3 0 15 13 0 0 31 SE 1 11 31 3 0 0 46 SSE 2 8 19 4 0 0 33 s 0 1 17 1 0 0 19 SSW 0 4 11 2 0 0 17 SW 0 6 9 2 0 0 17 WSW 1 3 9 5 0 0 18 w 0 5 8 4 0 0 17 WNW 1 5 15 6 0 0 27 NW 0 3 19 4 0 0 26 NNW 0 8 9 0 0 0 17 Variable 0 0 0 0 0 0 0 Total 13 84 222 48 0 0 367 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 75 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 7 7 0 0 0 14 NNE 0 1 6 0 0 0 7 NE 0 2 5 1 0 0 8 ENE 0 4 0 0 0 0 4 E 1 5 6 1 0 0 13 ESE 1 3 5 3 0 0 12 SE 0 1 4 1 0 0 6 SSE 0 2 2 0 0 0 4 s 0 1 1 0 0 0 2 SSW 2 2 0 0 0 0 4 SW 3 1 2 0 0 0 6 WSW 1 4 4 1 0 0 10 w 1 6 5 1 0 0 13 WNW 3 3 13 0 0 0 19 NW 1 3 7 0 0 0 11 NNW 0 5 1 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 13 50 68 8 0 0 139 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 76 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 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 2 0 0 0 0 2 E 0 2 0 0 0 *O 2 ESE 0 4 0 0 0 0 4 SE 0 1 2 0 0 0 3 SSE 0 5 9 0 0 0 14 s 0 2 6 4 0 0 12 SSW 0 11 5 5 0 0 21 SW 0 5 4 2 0 0 11 WSW 0 4 6 0 0 0 10 w 0 5 7 5 2 0 19 WNW 0 5 12 2 0 0 19 NW 0 5 18 0 0 0 23 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 51 69 18 2 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: 249 77 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017

  • Stability Class - Moderately Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 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 2 0 0 0 2 NE 2 3 1 0 0 0 6 ENE 0 0 1 0 0 0 1 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 1 1 0 0 0 2 SSE 0 1 2 0 0 0 3 s 0 3 4 1 1 0 9 SSW 0 2 2 1 0 0 5 SW 0 2 0 7 0 0 9 WSW 0 1 3 1 1 0 6 w 0 4 3 0 1 0 8 WNW 0 3 1 0 0 0 4 NW 0 3 2 0 0 0 5 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 2 23 23 10 3 0 61 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: 249 78 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 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 3 0 0 0 0 3 NE 0 1 4 0 0 0 5 ENE 3 0 0 0 0 0 3 E 0 1 0 0 0 0 1 ESE 0 2 0 0 0 0 2 SE 0 2 0 0 0 0 2 SSE 0 1 1 0 0 0 2 s 1 2 2 2 2 0 9 SSW 0 0 0 0 1 0 1 SW 0 2 2 2 0 0 6 WSW 0 1 1 3 0 0 5 w 0 6 3 3 3 0 15 WNW 0 1 6 1 0 0 8 NW 0 1 1 0 0 0 2 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 4 23 21 11 6 0 65 Hours of calm in this stability class: 0 I:Iours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 249 79 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Neutral - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 21 9 4 0 0 37 NNE 2 28 11 0 0 0 41 NE 6 15 11 0 0 0 32 ENE 16 14 1 0 0 0 31 E 9 8 0 0 0 0 17 ESE 0 10 4 0 0 0 14 SE 6 15 8 0 0 0 29 SSE 2 39 25 1 0 0 67 s 0 10 23 22 5 0 60 SSW 1 3 13 29 10 0 56 SW 1 13 36 6 2 0 58 WSW 3 21 30 9 0 0 63 w 10 20 45 20 3 0 98 WNW 5 28 29 2 0 0 64 NW 3 18 25 1 0 0 47 NNW 3 18 8 8 0 0 37 Variable 0 0 0 0 0 0 0 Total 70 281 278 102 20 0 751 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability clai:;s: 3 Hours of missing stability measurements in all stability classes: 249 80 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Slightly Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 18 3 0 0 0 26 NNE 8 18 3 0 0 0 29 NE 8 8 1 0 0 0 17 ENE 11 21 1 0 0 0 33 E 13 11 0 0 0 0 24 ESE 4 19 1 0 0 0 24 SE 8 35 6 0 0 0 49 SSE 4 49 27 1 0 0 81 s 3 32 21 3 0 0 59 SSW 0 13 23 1 0 0 37 SW 1 25 37 8 0 0 71 WSW 6 20 10 2 0 0 38 w 11 29 14 2 0 0 56 WNW 17 34 3 0 0 0 54 NW 12 23 7 0 0 0 42 NNW 5 37 5 1 0 0 48 Variable 0 0 0 0 0 0 0 Total 116 392 162 18 0 0 688 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 12

'Hours of missing stability measurements in all stability classes: 249 81 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 2 0 0 0 0 7 NNE 3 0 0 0 0 0 3 NE 1 0 0 0 0 0 1 ENE 0 1 0 0 0 0 1 E 11 2 0 0 0 0 13 ESE 6 4 0 0 0 0 10 SE 3 3 1 0 0 0 7 SSE 0 4 2 0 0 0 6 s 0 0 3 0 0 0 3 SSW 0 3 7 0 0 0 10 SW 3 5 7 0 0 0 15 WSW 7 4 0 0 0 0 11 w 22 14 0 0 0 0 36 WNW 17 10 0 0 0 0 27 NW 4 1 0 0 0 0 5 NNW 4 0 1 1 0 0 6 Variable 0 0 0 0 0 0 0 Total 86 53 21 1 0 0 161 Hours of calm in this stability class: 4 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 249 82 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - Decernber2017 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 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 1 1 0 0 0 0 2 NE 2 1 0 0 0 0 3 ENE 2 0 0 0 0 0 2 E 4 0 0 0 0 0 4 ESE 1 1 0 0 0 0 2 SE 1 0 0 0 0 0 1 SSE 0 0 0 0 0 0 0 s 0 0 0 0 0 0 0 SSW 1 0 0 0 0 0 1 SW 3 1 2 0 0 0 6 WSW 3 1 0 0 0 0 4 w 15 0 0 0 0 0 15 WNW 4 0 0 0 0 0 4 NW 3 0 3 0 0 0 6 NNW 3 0 3 3 1 0 10 Variable 0 0 0 0 0 0 0 Total 43 6 8 3 1 0 61 Hours of calm in this stability class: 11 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 249 83 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 1 0 0 0 0 1 ENE 0 0 1 0 0 0 1 E 0 0 3 0 0 0 3 ESE 0 2 0 0 0 0 2 SE 0 1 2 3 0 0 6 SSE 0 0 7 5 0 0 12 s 0 3 4 4 2 1 14 SSW 0 5 5 5 5 1 21 SW 0 1 8 1 0 0 10 WSW 0 4 3 1 0 2 10 w 0 0 5 6 6 1 18 WNW 0 1 10 19 4 0 34 NW 0 0 0 6 2 0 8 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 18 48 50 19 5 140 Hours of calm in this stability class: 0 Hours of mis13ing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 249 84 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Moderately Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 1 1 3 0 0 5 ENE 0 2 1 0 0 0 3 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 1 2 0 0 3 SSE 0 2 0 0 0 0 2 s 0 2 2 4 0 2 10 SSW 0 1 1 1 1 3 7 SW 0 1 2 0 1 0 4 WSW 0 0 3 2 2 2 9 w 0 3 3 3 0 0 9 WNW 0 2 1 1 0 0 4 NW 0 2 0 2 1 0 5 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 16 15 18 5 7 61 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: 249 85 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph) wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 0 0 0 1 NNE 0 0 1 0 0 0 1 NE 0 1 3 2 0 0 6 ENE 1 0 0 0 0 0 1 E 2 0 0 0 0 0 2 ESE 0 1 2 0 0 0 3 SE 0 1 2 1 0 0 4 SSE 0 0 0 0 0 0 0 s 0 1 1 1 0 4 7 SSW 0 1 0 1 2 1 5 SW 1 1 0 0 0 0 2 WSW 0 1 2 4 3 3 13 w 0 1 3 7 2 1 14 WNW 0 1 1 1 0 0 3 NW 0 0 2 1 0 0 3 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 4 9 18 18 7 9 65 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: 249 86 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Neutral - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 4 21 6 3 0 36 NNE 0 7 23 8 0 0 38 NE 0 3 24 9 1 0 37 ENE 0 20 4 0 0 0 24 E 2 13 7 2 0 0 24 ESE 1 4 6 7 1 0 19 SE 0 5 23 14 10 0 52 SSE 0 6 18 6 10 6 46 s 0 2 8 23 18 30 81 SSW 0 2 13 12 17 8 52 SW 1 5 27 30 1 0 64 WSW 1 12 10 15 6 10 54 w 1 5 13 38 15 2 74 WNW 0 9 15 31 15 1 71 NW 4 8 11 12 14 2 51 NNW 0 6 10 9 6 1 32 Variable 0 0 0 0 0 0 0 Total 12 111 233 222 117 60 755 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: 249 87 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Slightly Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 6 10 6 0 0 23 NNE 2 8 5 2 0 0 17 NE 1 8 14 2 0 0 25 ENE 0 7 15 1 0 0 23 E 1 5 8 8 0 0 22 ESE 0 5 6 10 1 0 22 SE 1 2 18 17 1 0 39 SSE 1 4 30 29 4 0 68 s 0 4 21 23 12 3 63 SSW 0 5 16 46 24 0 91 SW 0 7 22 33 3 0 65 WSW 1 5 13 11 3 0 33 w 1 6 14 32 4 0 57 WNW 2 10 14 27 0 1 54 NW 2 9 31 13 2 0 57 NNW 0 6 30 6 0 0 42 Variable 0 0 0 0 0 0 0 Total 13 97 267 266 54 4 701 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: 249 88 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph) wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 5 1 0 0 7 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 1 4 8 0 0 13 SE 0 2 6 5 0 0 13 SSE 0 2 1 5 0 0 8 s 0 0 6 1 0 0 7 SSW 1 0 3 4 0 0 8 SW 2 1 3 7 2 0 15 WSW 1 5 1 3 1 0 11 w 1 6 11 3 0 0 21 WNW 0 8 12 14 0 0 34 NW 1 5 11 3 0 0 20 NNW 0 5 1 1 1 0 8 Variable 0 0 0 0 0 0 0 Total 6 36 64 55 4 0 165 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: 249 89 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 4 1 0 0 5 NNE 1 0 1 0 0 0 2 NE 0 0 1 0 0 0 1 ENE 1 0 0 0 0 0 1 E 2 0 0 0 0 0 2 ESE 1 1 2 0 0 0 4 SE 0 3 0 0 0 0 3 SSE 0 1 1 0 0 0 2 s 1 1 0 0 0 0 2 SSW 1 2 0 0 0 0 3 SW 1 4 3 1 0 0 9 WSW 0 3 1 1 0 0 5 w 0 3 7 0 0 0 10 WNW 0 1 2 0 0 0 3 NW 0 2 3 5 4 0 14 NNW 2 0 2 1 0 1 6 Variable 0 0 0 0 0 0 0 Total 10 21 27 9 4 1 72 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: 249 90 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

WIND STABILITY CLASSES Table C-4 Atmospheric Stability Classes Temperature Change 3

Descri(;!tion Pasguill Stability Class cr5(degrees) with Height("C/100 m)

Extremely Unstable A >22.5 <-1.9 Moderately Unstable B 17.5 to 22.5 -1.9 to -1.7 Slightly Unstable c 12.5to 17.5 -1.7 to-1.5 Neutral D 7.5 to 12.5 -1.5 to-0.5 Slightly Stable E 3.8 to 7.5 -0.5to 1.5 Moderately Stable F 2.1to3.8 *1.5to 4.0 Extremely Stable G 0 to 2.1 >4.0 3

cra is the standard deviation of horizontal wind direction fluctuation over a period of 15 minutes to 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />.

From Regulatory Guide 1.21, Table 4B.

Atmospheric Stability Classes, Table C-4 from Braidwood ODCM.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

APPENDIX D: ERRATA There were no errors to previous reports identified in 2017.

92 of 92

Exelon Generation Company, LLC lo Generation Braidwood Nuclear Power Station 35100 South Route 53, Suite 84 Braceville, IL 60407-9619 www.exeloncorp.com April 27, 2018 BW180045 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555-0001 Braidwood Station, Units 1 and 2 Renewed Facility Operating License Nos. NPF-72 and NPF-77 NRC Docket Nos. 50-456 and 50-457 ISFSI Docket No. 72-73

Subject:

2017 Radioactive Effluent Release Report The attached document includes the Radioactive Effluent Release Report for Braidwood Station. This report is being submitted in accordance with 10 CFR 50.36a, "Technical specifications on effluents from nuclear power reactors," and Technical Specification 5.6.3, "Radioactive Effluent Release Report," and includes a summary of radiological liquid and gaseous effluents and solid waste released from the site from January 2017 through December 2017.

If you have any questions regarding this information, please contact Marta Spillie, Regulatory Assurance Manager, at (815) 417-4833.

Respectfully, fll~' /MtdJrr~

Marri Marchionda-Palmer Site Vice President Braidwood Station cc: US NRC Regional Administrator, Region Ill US NRC Senior Resident Inspector - Braidwood Station NRR Project Manager - Braidwood Station Illinois Emergency Management Agency - Division of Nuclear Safety

Braidwood Nuclear Power Station Annual Radioactive Effluent Release Report (ARERR)

UNIT 1 AND 2 (Docket Numbers 50-456 and 50-457)

ISFSI (Docket Number 72-73)

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

DOCUMENT INDEX Preface ..................................................................................................................................................... 2 Introduction ............................................................................................................................................... 9 A. Supplemental Information ........................................................................................................... 9 B. Gaseous Effluents ....................................................................................................................... 16 C. Liquid Effluents ............................................................................................................................ 16 D. Radiological Impact on Man ........................................................................................................ 16 E. Meteorological Data .................................................................................................................... 18 F. Offsite Ambient Radiation Measurements ................................................................................... 18 G. Radioactive Solid Waste Disposal .............................................................................................. 19 APPENDIX A: EFFLUENT AND WASTE DISPOSAL

SUMMARY

.......................................................... 20 APPENDIX B: SOLID WASTE AND IRRADIATED FUEL SHIPMENTS ................................................. 30 APPENDIX C: WIND DIRECTION AND STABILITY CLASSES .............................................................. 34 APPENDIX D: ERRATA ........................................................................................................................... 92 Page 1 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73}

Preface The following sections of the preface are meant to help define key concepts, provide clarity, and give context to the readers of this report.

Annual Reports The Nuclear Regulatory Commission (NRG) is the federal agency who has the role to protect public health and safety through the development of regulations governing nuclear power reactors and ensuring their compliance. As part of the many commitments Nuclear Power Plants have NRG to ensure this safety, they provide two reports annually to specifically address how the station's operation impacts the environment of local communities. The NRG then reviews these reports and makes them available to the public. The names of the reports are the Annual Radioactive Effluent Release Report (ARERR) and the Annual Radiological Environmental Operating Report (AREOR).

The ARERR reports the results of the sampling from the effluent release paths at the station analyzed for radioactivity. An effluent is a liquid or gaseous waste containing plant-related radioactive material emitted at the boundary of the facility.

The AREOR reports the results of the samples obtained in the environment surrounding the station.

Environmental samples include air, water, vegetation, and other sample types that are identified as potential pathways radioactivity can reach humans.

Graphic 1. Examples of Gaseous and liquid Effluent Pathways Graphic 1 demonstrates some potential exposure pathways from Braidwood Nuclear Power Station. The ARERR and AREOR together ensure Nuclear Power Plants are operating in a manner that is within established regulatory commitments meant to adequately protect the public.

Page 2 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Understanding Radiation Generally radiation is defined as emitted energy in the form of waves or particles. If radiation has enough energy to displace electrons from an atom it is termed "ionizing", otherwise it is "non-ionizing". Non-Ionizing radiation includes light, heat given off from a stove, radiowaves and microwaves. Ionizing radiation occurs in atoms, particles too small for the eye to see. So, what are atoms and how does radiation come from them?

Graphic 2. Types of Radiation, from NASA Hubblesite The Electromagnetic Spectrum Wavelength In meiers

( i:t..dio

<-1 Aboul the size of:

tili; f Builcings

'E.I Grains Pro1azaans Bacteria of sugar Molecules Atoms Atomic nuclel An atom is the smallest part of an element that maintains the characteristics of that element. Atoms are made up of three parts: protons, neutrons, and electrons.

Graphic

3. Structure of an Atom Neutron*--------- ..

- --- - ~ - ..,

The number of protons in an atom determines the element. For example, a hydrogen atom will always have one proton while an oxygen atom will always have eight protons. The protons are clustered with the neutrons forming the nucleus at the center of the atom. Orbiting around the nucleus are the relatively small electrons.

Isotopes are atoms that have the same number of protons but different numbers of neutrons. Different isotopes of an element will all have the same chemical properties and many isotopes are radioactive while other isotopes are not radioactive. A radioactive isotope can emit radiation because it contains excess energy in its nucleus. Radioactive atoms and isotopes are also referred to as radionuclides and radioisotopes.

Page 3 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

There are two basic ways that radionuclides are produced at a nuclear power plant. The first is fission, which creates radionucides that are called fission products. Fission occurs when a very large atom, such as uranium-235 (U-235) or plutonium-239 (Pu-239), absorbs a neutron into its nucleus making the atom unstable. The unstable atom can then split into smaller atoms. When fission occurs there is a large amount of energy released, in the form of heat. A nuclear power plant uses the heat generated to boil water that spins turbines to produce electricity.

The second way a radionuclide is produced at a nuclear power plant is through a process called activation.

Radionuclides produced in this method are termed activation products. Pure water that passes over the fissioning atoms is used to cool the reactor and also produce steam to turn the turbines. Although this water is considered to be very pure, there are always some contaminants within the water from material used in the plant's construction and operation. These contaminants are exposed to the fission process and may become activation products. The atoms in the water itself can also become activated and create radionuclides.

Over time, radioactive atoms will reach a stable state and no longer be radioactive. To do this they must release their excess energy. This release of excess energy is called radioactive decay. The time it takes for a radionuclide to become stable is measured in units called half-lives. A half-life is the amount of time it takes for half of the original radioactivity to decay. Each radionuclide has a specific half-life. Some half-lives can be very long and measured in years while others may be very short and measured in seconds.

Graphic 4. Radioactive Decay Half-Life Half-life 1000 800 The amount of time it takes for half of the original radioactivity to decay 600 Activity 400 200 0

1 half-life 2 half-lives 3 half-lives 4 half*hves In the annual reports you will see both man made and naturally ocurring radionuclides listed, for example potassium-40 (K-40, natural) and cobalt-60 (Co-60, man-made). We are mostly concerned about man-made radionuclides because they can be produced as by-products when generating electricity at a nuclear power plant. It is important to note that there are also other ways man-made radionuclides are produced, such as detonating nuclear weapons. Weapons testing has deposited some of the same man-made radionuclides into the environment as those generated by nuclear power, and some are still present today because of long half-lives.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Measuring Radiation There are four different but interrelated units for measuring radioactivity, exposure, absorbed dose, and dose equivalent. Together, they are used to scientifically report the amount of radiation and its effects on humans.

  • Radioactivity refers to the amount of ionizing radiation released by a material. The units of measure for radioactivity used within the AREOR and ARERR are the Curie (Ci). Small fractions of the Ci often have a prefix, such as the microcurie (µCi), which means 1/1,000,000 of a Curie.
  • Exposure describes the amount of radiation traveling through the air. The units of measure for exposure used within the AREOR and ARERR are the Roentgen (R). Traditionally direct radiation monitors placed around the site are measured milliRoentgen (mR), 1/1,000 of one R.
  • Absorbed dose describes the amount of radiation absorbed by an object or person. The units of measure for absorbed dose used within the AREOR and ARERR are the rad. Noble gas air doses are reported by the site are measured in millirad (mrad), 1/1,000 of one rad.
  • Dose equivalent (or effective dose) combines the amount of radiation absorbed and the health effects of that type of radiation. The units used within the AREOR and ARERR are the Roentgen equivalent man (rem). Regulations require doses to the whole body, specific organ, and direct radiation to be reported in millirem (mrem), 1/1,000 of one rem.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Sources of Radiation People are exposed to radiation every day of their lives and have been since the dawn of mankind. Some of this radiation is naturally occurring while some is man-made. There are many factors that will determine the amount of radiation individuals will be exposed to such as where they live, medical treatments, etc. The average person in the United States is exposed to approximately 620 mrem each year. Half of this exposure, 310 mrem, comes from natural sources and the other half, 310 mrem, from man-made sources. Graphic 5 shows what the typical sources of radiation are for an individual over a calendar year:

Graphic 5. Sources of Radiation Exposure in the U.S., fram NCRP Repart No. 160 Sources of Radiation Exposure in the U.S.

Industrial and Terrestrial (Soil) - 3%

Occupational lntemal-5% <0.1%

Consumer - 2%

Nuclear Medicine 12%

CJ* -310 Natural Sources - 50%

millirem (0.31 rem)

- Manmade Sources - 50%

-310 millirem (0.31 rem)

Source1 NCRP R11port No. l!iO {20091 Full reportinvailable on the NCRPweb;lte~twvN1.NCRPonlin11.011 The radiation from a nuclear power plant is included in the chart as part of the "Industrial and Occupational" fraction, <0.1 %. The largest natural source of radiation is from radon, because radon gas travels in the air we breathe. Perhaps you know someone who had a CT scan at a hospital to check his or her bones, brain, or heart. CT scans are included in the chart as "Medical Procedures" which make up the next largest fraction.

Graphic 6 on the following page shows some of the common doses humans receive from radiation every year.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Graphic 6 .Relative Dases fram Radiation Sources, from EPA Radiation Doses and Sources RELATIVE DOSES FROM RADIATION SOURCES All doses from the National Council on ltadlaUon Protection & Measurements, Report No. 160 {unless otherwise denoted)

Whole body CT 1,000 mllllrem (stngle procNure}

Upper GutrolntMtlnal x-ray axam with nuoroscopy 600mllllrem (single procedure}

Radon In avera11e U.S. home 22Bmllllrem (annual)

H1111dCT 200 mllllrem

(*Ingle procedunt)

Coamlc radiation living In Denver (high elevation) approxlmatelv BO mllllrem (annual)

Mammo11ram 42 mllllrem (single procedunt}

~ Cosmic radiation llvlng at 1u From lCRP 2007 level (low elavatlon) approxlmatelv 30 mllllram (annual)

Radiation In the body 211 mllllrem (annual)

Terrestrial radioactivity 21 mll11rem (annu*IJ ci...tx*ray lOmllllrem

(*Ingle procedurw)

Living near a nuclear power station

< 1 mllllrem (annual}

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Radiation Risk Current science suggests there is some risk from any exposure to radiation. However, it is very hard to tell whether cancers or deaths can be attributed to very low doses of radiation or by something else. U.S.

radiation protection standards are based on the premise that any radiation exposure carries some risk.

The following graph is an example of one study that tries to relate risk from many different factors. This graph represents risk as "Days of Lost Life Expectancy. All the categories are averaged over the entire population except Male Smokers, Female Smokers, and individuals that are overweight. Those risks are only for people that fall into those categories. The category for Nuclear Power is a government estimate based on all radioactivity releases from nuclear power, including accidents and wastes.

Graphic 7. Days of Lost Life Expectancy, Adapted from the Journal of American Physicians and Surgeons Volume 8 Number 2 Summer2003 Days of Lost Life Expectancy Smoking* Men Heart Disease Smoking* Women Cailler Every 10 lbs overweight Stroke -

Motor Vehicle Accident -

Air Polluti0t1 I Radon I Clwmkal Residue in Foods I Drowning I ll11rrir anP> ar:d TornadtlE"i lightning 0 500 10'.JO 1500 7000 2500 3000 Days of Lost Life Expectancy H11nirarli?<>,md Tornado<ar Power I 0 02 0.4 0.6 0.8 1.4 2 Page 8 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Introduction This report quantifies the radioactive gaseous, liquid, solid radioactive waste (radwaste) releases, and summarizes the local meteorological data for the period from January 01, 2017 through December 31, 2017.

This report has been prepared utilizing the methodology and parameters specified in the calculation of offsite doses resulting from radioactive gaseous and liquid effluents found in Braidwciod's Offsite Dose Calculation Manual (ODCM). It has been formatted consistent with Exelon Procedure CY-AA-170-2000 "ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT" and exceeds the requirements specified in Regulatory Guide 1.21 Revision 1, "MEASURING, EVALUATING, AND REPORTING RADIOACTIVITY IN SOLID WASTES AND RELEASES OF RADIOACTIVE MATERIALS IN LIQUID AND GASEOUS EFFLUENTS FROM LIGHT-WATER-COOLED NUCLEAR POWER PLANTS."

The quantity of radioactive material released from Braidwood Nuclear Power Plant was determined from in-house and vendor laboratory analysis of continuous inline sampling media and batch sample media from all ODCM specified effluent pathways. These pathways include continuous releases from the Unit 1 and 2 Station Vent Stacks, Exelon Pond Remediation, Turbine Building Remediation, Vacuum Breaker #1 Remediation, Condensate Polisher Sump, Waste Water Treatment, and Circulating Water Slowdown. The ODCM specified effluent pathways also include batch releases from the Unit 1 and Unit 2 Primary Containments, Waste Gas Decay Tanks, and Liquid Radwaste Batch Release Tanks. The quantification of radioactive material released from Braidwood Nuclear Power Plant also includes non-routine planned discharges from two remediation wells, installed in 2017 at the River Screen House, that are not currently listed as ODCM effluent pathways.

The volume and quantity of radioactive waste shipped offsite from Braidwood Nuclear Power Plant for processing and disposal were determined from data maintained in the radwaste shipping database.

Radwaste processed for shipment was in accordance with Exelon procedure RW-AA-100, "PROCESS CONTROL PROGRAM FOR RADIOACTIVE WASTES" and consistent with the UFSAR.

Meteorological data was obtained from the 320-foot meteorological tower located on the Braidwood Station premises.

A. Supplemental Information

1. Regulatory Limits
a. Fission and Activation Gases:

Dose Rate

1) Less than 500 mrem/year to the whole body (instantaneous limit, per site).
2) Less than 3,000 mrem/year to the skin (instantaneous limit, per site).

Dose Gamma Radiation

1) Less than or equal to 5 mrad/quarter (per unit).
2) Less than or equal to 10 mrad/year (per unit).

Dose Beta Radiation

1) Less than or equal to 1O mrad/quarter (per unit).
2) Less than or equal to 20 mrad/year (per unit).
b. Iodine: (summed with particulate and tritium, see below)

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c. Particulates with half-lives > 8 days:

Dose Rate

1) Less than 1,500 mrem/year to any organ (instantaneous limit, per site).

Dose

1) Less than or equal to 7.5 mrem/quarter to any organ (per unit).
2) Less than or equal to 15 mrem/year to any organ (per unit).
d. Liquid Effluents Dose
1) Less than or equal to 1.5 mrem to the whole body during any calendar quarter (per unit).
2) Less than or equal to 5 mrem to any organ during any calendar quarter (per unit).
3) Less than or equal to 3 mrem to the whole body during any calendar year (per unit).
4) Less than or equal to 1O mrem to any organ during any calendar year (per unit).
2. Effluent Concentration Limits
a. Fission and Activation Gases: 10CFR20 Appendix B Table 2
b. Iodine: 10CFR20 Appendix B Table 2
c. Particulates: 10CFR20 Appendix B Table 2
d. Liquid Effluents: 1OX10CFR20 Appendix B Table 2
3. Average Energy The ODCM limits the dose equivalent rates due to the release of noble gases to less than or equal to 500 mrem/yr to the total body, and less than or equal to 3,000 mrem/yr to the skin. Therefore, the average beta and gamma energies (E) for gaseous effluents as described in Regulatory Guide 1.21 are not applicable.
4. Measurements and Approximations of Total Radioactivity
a. Fission and activation gases:

Before being discharged, containment batch releases are analyzed for noble gas via gamma spectroscopy. Gaseous decay tanks are analyzed for noble gases before being discharged via gamma spectroscopy. Released activity is normally calculated using volume of release, which is determined by purge flow rate times the duration of the discharge.

The Auxiliary Building ventilation exhaust system is continually monitored for radioactive iodines (radioiodines) and particulates. These samples are pulled every seven days and analyzed via gamma spectroscopy.

Noble gas samples are pulled and analyzed weekly by gamma spectroscopy. The average flow at the release points and nuclide specific activity concentrations are used to calculate the activity released.

Volumes and activities of effluents discharged from systems that are common to both units are divided between both units.

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b. Iodines:

Radioiodines in the Auxiliary Building ventilation exhaust system are continually being collected via activated charcoal cartridges in the diverted sample process flow. The iodine cartridges are pulled weekly and analyzed via gamma spectroscopy. Radioiodine concentrations greater than the lower limit of detection (LLD) are multiplied by the volume of air discharged during the sampling timeframe.

Radioiodines are analyzed in liquid effluent streams through performance of batch release tank grab samples and weekly liquid effluent composite samples. The analyses are performed via gamma spectroscopy of the liquid samples.

Volumes and activities of effluents discharged from systems that are common to both units are divided between both units. Effluents that are unit specific are assigned to the appropriate unit.

c. Particulates, half-lives > 8 days:

Particulates in the Auxiliary Building ventilation exhaust system are continually being collected via filter media in the diverted sample process flow. Particulate filter media is pulled weekly and analyzed via gamma spectroscopy. Particulate concentrations greater than LLD are multiplied by the volume of air discharged during the sampling timeframe. A composite sample is created from 3 month's particulate sample media for Sr-89/90, Fe-55, Ni 63, and gross alpha analysis by an offsite vendor. The vendor supplied data is utilized in conjunction with the volume of air released through the Auxiliary Building ventilation to quantify Sr-89/90, Fe-55, Ni-63, and gross alpha releases.

Volumes and activities of effluents discharged from systems that are common to both units are divided between both units. Effluents that are unit specific are assigned to the appropriate unit.

d. Tritium:

Before being discharged, containment batch releases are analyzed for tritium via a liquid scintillation counter (LSC). Tritium is sampled using a flow-through bubbler system. Released activity is calculated using volume of release, which is determined by purge flow rate multiplied by the duration of the discharge.

The Auxiliary Building ventilation exhaust system is monitored for tritium using a flow-through bubbler system. Tritium is sampled every seven days and analyzed by LSC.

The secondary sides of both units contain tritium. Minimal amounts of tritium are continually released to the atmosphere from secondary components through packing leaks, tank vents, the main condenser, etc. Bounding calculations have been performed to show that large leaks (1000 gallons/day (gpd)) for extended periods (1 month) at normal secondary tritium concentrations would provide an insignificant increase (1.00E-5 mrem) in offsite dose.

e. Gross alpha Gross alpha is analyzed in both the gaseous and liquid effluent pathways. Weekly gaseous particulate media is composited for offsite vendor analysis. Gross alpha activity greater than vendor LLD values are assigned to the applicable timeframe and gaseous volume released.

Liquid effluent gross alpha analysis is performed through compositing monthly discharges and gas flow proportional counting.

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f. Carbon-14 Carbon-14 (C-14) is assessed in continuous gaseous effluents using Electric Power Research lnstitute's (EPRI} industry accepted production mechanism and production rate study 1021106.

C-14 production is a function of each unit's full power operation and gaseous volume released.

C-14 is not evaluated through laboratory sample analysis.

g. Liquid effluents:

Liquid effluents are categorized as either batch release or continuous release. All liquid releases are analyzed for principal gamma emitters, radioiodines, dissolved and entrained gases, gross alpha, and tritium onsite via gamma spectroscopy, gas flow proportional counting, or liquid scintillation, as appropriate. An offsite laboratory analyzes liquid composites for Sr-89/90, Fe-55 and Ni-63. Vendor results are applied to the applicable volume of liquids discharged during the timeframe. Volumes and activities of effluents discharged from systems or locations are divided between both units.

h. Estimated Total Error Present Procedure CY-AA-170-2100, Estimated Errors of Effluent Measurements provides the methodology to obtain an overall estimate of the error associated with radioactive effluents.

Estimated total error is calculated periodically and communicated as part of Appendix A Effluent and Waste Disposal Summary.

i. Lower Limit of Detection (LLD)

Samples are analyzed such that the Offsite Dose Calculation Manual (ODCM) LLD requirements are met. When a nuclide is not detected during the quarter then <LLD is reported. The ODCM required lower limit of detection for airborne and liquid releases are as follows:

Table 4.i ODCM Effluent LLD Values Airborne: LLD Gross Aloha Sr-89 Sr-90 1.00E-11 uCi/cc H-3 1.00E-07 uCi/cc 1-131 in Charcoal Samples 1.00E-12 11Ci/cc 1-133 in Charcoal Samples 1.oo E-1 o uCi/cc Principal Gamma Emitters (Mn-54, Fe-59, Co-58, Co-60, Zn-65, Mo-99, Cs-134, Cs-137, 1-131, Ce-141, Ce-144) in Grab Samples 1.00E-04 µCi/cc Principal Gamma Emitters (Mn-54, Fe-59, Co-58, Co-60, Zn-65, Mo-99, 1.00E-11 µCi/cc Cs-134, Cs-137, 1-131, Ce-141, Ce-144) in Particulate Samples Noble Gas (Kr-87, Kr-88, Xe-133, Xe-133m, Xe-135, Xe-138), Gross Beta or Gamma 1.00E-06 µCi/cc Page 12 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Table 4.i ODCM Effluent LLD Values (continued)

Liquid: LLD Principal Gamma Emitters except Ce-144 (Mn-54, Fe-59, Co-58, Co-5.00E-07 uCi/ml 60 Zn-65 Mo-99 Cs-134 Cs-137. Ce-141)

Ce-144 5.00E-06 uCi/ml 1-131 1.00E-06 uCi/ml Entrained Gases (Kr-87, Kr-88, Xe-133 Xe-133m Xe-135 Xe-138) 1.00E-05 uCi/ml H-3 1.00E-05 uCi/ml Gross Alpha 1.00E-07 uCi/ml Sr-89, Sr-90 5.00E-08 uCi/ml Fe-55 1.00E-06 uCi/ml This list does not mean that only these nuclides are considered, but this list is used to ensure acceptable detection standards. Braidwood tests and maintains LLD records in accordance with procedure CY-AA-130-201 "Radiochemistry Quality Control."

5. Batch Releases
a. Liquid Batch Releases 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr. Total
1. Total Number of Batch Releases 19 26 26 28 99
2. Total Time Period for Batch Releases (minutes) 3.06E+04 4.11 E+04 3.60E+04 6.08E+04 1.68E+05
3. Maximum Time Period for a Batch Release (minutes) 3.54E+03 3.32E+03 5.77E+03 6.02E+03 6.02E+03
4. Average Time Period for a Batch Release (minutes) 1.61E+03 1.58E+03 1.38E+03 2.17E+03 1.70E+03
5. Minimum Time Period for a Batch Release (minutes) 1.89E+02 2.11 E+02 9.00E+01 7.02E+02 9.00E+01
6. Average Stream Flow During Periods of Release 1.13E+07 1.75E+07 5.72E+06 9.06E+06 1.09E+07 of Effluent into a Flowing Stream (liters/min) 1
b. Gaseous Batch Releases 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr. Total
1. Total Number of Batch 52 62 49 70 233 Releases
2. Total Time Period for 8.41 E+03 3.78E+04 1.38E+04 3.74E+04 9.74E+04 Batch Releases (minutes)
3. Maximum Time Period for 1.51 E+03 1.28E+04 2.30E+03 2.19E+03 1.28E+04 a Batch Release (minutes)
4. Average Time Period for 1.62E+02 6.10E+02 2.82E+02 5.34E+02 4.18E+02 a Batch Release (minutes)
5. Minimum Time Period for 1.90E+01 2.20E+01 2.30E+01 2.20E+01 1.90E+01 a Batch Release (minutes) 1 Kankakee River Flows obtained from US Geological Survey website from daily average flow data.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

6. Abnormal Releases
a. Leaks and Spills There was one abnormal liquid release that occurred in 2017. It is described below:

On June 11 1h, 2017 it was it was identified that water being removed as part of maintenance activities in the Circulating Water Slowdown (CWBD) House was discharged to the ground approximately 50 feet from the discharge canal. Once discovered, the discharge was terminated and the area was inspected. The investigation determined that approximately 35,000 gallons of water was released between May 28, 2017 and June 11, 2017, with variable concentrations with a maximum tritium concentration of 200,209 pCi/L. The water released did not migrate off station property.

Corrective actions taken in response to this event included the placement of multiple monitoring wells at various depths in the vicinity of the CWBD house to determine soil contamination levels, as well as the establishment of soil remediation efforts to remove the tritium contamination from the area. The discharges of remediation wells are treated as non-routine planned discharges.

They are sampled regularly and permitted in the same manner as other ODCM pathways. The corresponding activity values and doses are included as part of liquid effluent releases in this report.

7. Radioactive Waste Treatment System Changes There were no changes to the gaseous radioactive waste treatment system, the ventilation exhaust treatment system, or the liquid radioactive waste treatment system in 2017.
8. Changes to the Annual Land Use Census The 2017 Land Use Survey was performed on August 16, 2017. The only changes identified between the 2017 survey and the previous year's survey were related to livestock. Three sectors (ENE, S, SW) that previously had beef cattle, had no cattle in the 2017 survey. This change cannot affect an increase in calculated dose from station effluents via the food ingestion pathway and no action was required. No change was required to the Radiological Environmental Monitoring Program (REMP).
9. Radioactive Effluent Monitoring Instrumentation Out of Service for More than 30 Days There were no radioactive effluent monitoring instruments out of service for more than 30 days in 2017.
10. Revisions to the ODCM There were no changes to the Braidwood Station ODCM in 2017.
11. Independent Spent Fuel Storage Installation (ISFSI)

An Independent Spent Fuel Storage Installation (ISFSI) was placed in service at Braidwood Station in 2011. The ISFSI is a closed system and the only exposure would be due to direct radiation, which is measured by Optically Stimulated Luminescent Dosimetry (OSLO). In 2017 the dose to the nearest resident from the ISFSI was estimated to be 3.40E-01 mrem. This estimate was determined using environmental dosimeters from the Radiological Environmental Monitoring Program.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

12. ERRATA There were no errors to previous reports identified in 2017.
13. Sampling and Instrumentation Issues
a. On June 26, 2017, the flow totalizer instrumentation used to quantify the discharge volume from site remediation well RW-11 was found not functioning. The flow totalizer was replaced later the same day.
b. On July 7, 2017, compensatory sampling measures were in place due to inoperable composite samplers at remediation wells RW-11 and RW-12. The compensatory sampling measures include manual grab samples three times per day. Due to infrequent automatic pumping of the remediation wells, only two grab samples were obtained from RW-11 and RW-12 discharge on this date.
c. On July 19, 2017, the automatic composite sampler for remediation well RW-12 was found with a "full bottle error" preventing further continuous composite sampling. A grab sample was obtained at the time of discovery. An issue with the sampler purge was identified and corrected, allowing the sampler to resume proper sampling sequences. The full bottle occurred on 7/17/17 at 2300 and the condition was corrected on 7/19/17 at 1400.
d. On September 25, 2017, the Station's Circulating Water Slowdown (CWBD) composite sampler was found de-energized due to a faulty electrical power outlet. The sampler was re-energized from a functional power outlet and automatic composite sampling was restored 9/25/27 at 1133.

Investigation found that the first missed sample due to the power outage occurred 9/23/17 at 0644. During the compositors' power outage from 9/23/17 at 0644 to 9/25/17 at 1133, compensatory grab samples were not performed.

e. On October 5, 2017, the Station's Condensate Polisher (GP) Sump composite sampler was found not operating. The exact cause of the malfunction was not able to be determined, but was believed to be a power supply related trip when the OPR41 J alarm was received by operations for lost flow on 10/4/17. The composite sampler was returned to service and was restored to proper function shortly after the discovery. The compositor had been checked and was operating correctly during routine checks on 10/2/17 at 0820. The maximum approximate time frame for the composite sampler not functioning was 10/2/17 0820 to 10/5/17 at 0805, although it is believed timeframe was shorter and the malfunction occurred 10/4/17 (time undetermined).

During that time, compensatory grab samples were not performed.

f. On November 21, 2017 it was identified that the weekly analysis of the Diesel Driven Auxiliary Feed Pumps (DDAF) air intake had not been sampled and analyzed for noble gas as expected on 11 /16/17. The tritium grab sample, normally taken at the time of the noble gas grab sample had been completed and analyzed. The normal samples for particulate and Iodine had also been completed for this time frame. The results for tritium, particulate, and iodine were less than the LLD. The previous week's sample results were reviewed for all the DDAF air intake analyses and all had been <LLD. No plant conditions existed that would indicate noble gas may have been present in the DDAF air intake.
g. On December 18, 2017, during routine activities, it was noted that the composite sampler for CWBD had a very small sample volume. CWBD flow had been shut down for six days and the sample volume contained within the compositor was correct for the short time that CWBD flow had been available to sample. A delay in the analysis caused the required LLD for dissolved and entrained gasses not to be met. All other isotopic analyses Were properly carried out on the available sample and the results showed no radionuclides were present.

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h. On December 29, 2017, the composite samplers for remediation wells RW-11 and RW-12 were found to be not functioning due to frozen conditions in the sampler tubing and sample receptacles. The exact duration of the frozen conditions and lack of sampling for the remediation wells discharge could not be determined, but the samplers were functioning when checked on 12/28/17. Remediation was secured and was not resumed before the end of the year.

B. Gaseous Effluents Gaseous radioactive releases for 2017 captured in Tables 1A, 1B-1, and 1B-2 in Appendix A for Units 1 and 2 combined. Radioactive noble gases released for the timeframe totaled 3.69E-01 Curies. Releases of all radioiodines, halogens, and particulates totaled 4.31 E-04 Curies. Gaseous tritium releases totaled 2.82E+02 Curies. Gaseous carbon-14 was calculated to total 8.39E+OO Curies. No gross alpha was detected in gaseous effluents.

C. Liquid Effluents Liquid radioactive releases for 2017 are captured in Tables 2A, 2B-1, and 2B-2 in Appendix A for Units 1 and 2 combined. Ninety-nine (99) liquid batch releases occurred during the reporting period. These discharges contained 2.42E+03 Curies of tritium and 9.22E-02 Curies of fission and activation products.

D. Radiological Impact on Man

1. Dose to Members of the Public at or Beyond Site Boundary Per ODCM Chapter 6.1 the Annual Radioactive Effluent Release Report shall include an assessment of radiation doses to the hypothetically highest exposed MEMBER OF THE PUBLIC from reactor releases, ISFSI and other nearby uranium fuel cycle sources (including doses from primary effluent pathways and direct radiation) for the previous calendar year. The ODCM does not require population doses to be calculated. For purposes of calculation, the following assumptions were made per the ODCM:
  • Long term annual average meteorology X/Q and D/Q and actual gaseous effluent releases were used.
  • Gamma air dose, Beta air dose, Total Body and Skin doses were attributed to noble gas releases.
  • A 0.7 shielding factor was assumed to account for shielding due to occupancy of structures
  • Doses, Design Objective Limit, and Dose Limit comparisons reported combined for the site (Units 1 and 2 together).
  • Dosimetry measurements obtained from the highest station values in the Radiological Environmental Monitoring Program were used to calculate dose to the nearest residence from the Independent Spent Fuel Storage Installation (ISFSI). The dose measured at the station was extrapolated to the residence location.
  • The highest doses from the critical organ and critical age group for each release pathway was summed and added to the net dosimetry measurement from nearest residence to the ISFSI for 40CFR190 and 10CFR72.104 dose compliance.
  • Evaluation of 40CFR190 and 10CFR72.104 dose is used to demonstrate compliance to 10CFR 20 and satisfy station RETS and Technical Specifications.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

a. Gaseous Releases The critical age-organ was the child-bone. Calculated total body dose was 3.94E-01 mrem and organ dose was 1.76E+OO mrem.
b. Liquid Releases The critical age-organ was the child-GI-LU. Calculated total body dose was 7.78E-02 mrem and organ dose was 7.88E-02 mrem.
c. 40CFR190 and 10CFR72.104 Compliance The Braidwood ODCM defines the total dose for the uranium fuel cycle as the sum of doses due to radioactivity in airborne and liquid effluents and the doses due to direct radiation from contained sources at the nuclear power station (ODCM A.4.2 Total Dose, Equation A-25). The total dose, nror, in the unrestricted area to a member of the public due to plant operations is given by:

Where:

nror Total Dose to Member of Public [mrem]

Total off-site dose to a member of public due to plant operations.

nEx Total External Total Body Dose [mrem]

Total body dose due to external exposure to noble gases, N-16 skyshine and on-site storage facilities.

D~~q Liquid Effluent Dose [mrem]

Dose due to liquid effluents to age group a and organ j. The age group and organ with the highest dose from liquid effluents is used.

D~NG Non-Noble Gaseous Effluent Dose [mrem]

Dose due to non-noble gaseous effluents to age group a and organ j. The age group and organ with the highest dose from non-noble gas effluents is used.

The maximum calculated dose to a real individual would not exceed 8.12E-01 mrem (total body),

2.18E+OO mrem (organ), or 8.18E-01 mrem (thyroid)

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Table D.1 Summary of Gaseous and Liquid Effluent Oases ta Members af the Public at the Highest Dase Receptors vs 10 CFRSO Design Objectives Design

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

Nearest Residence Gamma Air Dose 1.15E-05 All 5.75E-05 20 mrad Nearest Residence Beta Air Dose 1.99E-05 All 4.98E-05 40 mrad Nearest Residence Total Bodv 1.07E-05 All 1.07E-04 10 mrem Nearest Residence Skin 2.31 E-05 All 7.69E-05 30 mrem Non-Noble Gas Nearest Residence Bone 1.76E+OO Child 5.87E+OO 30 mrem Liquid Nearest Residence Total Bodv 7.78E-02 Child 1.30E+OO 6 mrem Nearest Residence GI-LU 7.88E-02 Child 3.94E-01 20 mrem Table D.2 Summary af Doses ta Members of the Public at the Highest Dase Receptors far 40CFR190 and 10CFR74.104 Compliance Non- External %of Highest Dose Noble Liquid Direct Total Applicable Limit Unit Receptors Gas Effluents Radiation Limit Total Body Dose 3.94E-01 7.78E-02 3.40E-01 8.12E-01 3.25E+OO 25 mrem Oroan Dose 1.76E+OO 7.88E-02 3.40E-01 2.18E+OO 8.73E+OO 25 mrem Thyroid Dose 4.00E-01 7.78E-02 3.40E-01 8.18E-01 1.09E+OO 75 mrem E. Meteorological Data The Braidwood Station meteorological monitoring program produced 52,078 hours9.027778e-4 days <br />0.0217 hours <br />1.289683e-4 weeks <br />2.9679e-5 months <br /> of valid data out of a possible 52,560 parameter hours during 2017 (365 days x 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />s/day x 6 measured priority parameters), which represents an overall data recovery rate of 99.8%. Priority parameters are all parameters except dew point temperature and precipitation. For the year, winds measured at 34 ft. most frequently came from the West-(10.63%) and fell into the 3.6 - 7.5 mph wind speed class (41.53%).

Calms (wind speeds at or below the sensor threshold) were measured 0.00% of the time and speeds greater than 24.5 mph were measured 0.07% of the time. Stability based on the 199 - 30 ft. differential temperature most frequently fell into the slightly stable classification (39.86%).

Appendix C contains the Joint Frequency Distribution tables from the Meteorological Data collected in 2017.

F. Offsite Ambient Radiation Measurements Review of the Braidwood Optically Stimulated Luminescent Dosimetry (OSLD) data showed statistical increases above background at only locations related to the ISFSI pad. A dose evaluation was performed taking the highest readings and extrapolating dose to the nearest resident. The dose to the resident was estimated to be 3.40E-01 mrem in 2017.

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G. Radioactive Solid Waste Disposal Radioactive wastes shipped offsite are captured in the table titled, "Solid Wastes Shipped Offsite for Burial or Disposal (Not irradiated fuel)." Approximately 5.49E+02 cubic meters of solid waste was shipped offsite containing approximately 1.11 E+02 Curies during the 2017 reporting period. Appendix B contains tables and detailed information about the Solid Waste Disposal program.

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TABLE 1A GASEOUS EFFLUENTS- - SUMMATION OF ALL RELEASES UNIT 1 AND 2 Est. Total Unit 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Total Error%

A. Fission and Activation Gas Releases

1. Total Release Activity Ci 5.11 E-02 2.67E-01 5.14E-02 <LLD 3.69E-01 7.59E+OO I
2. Average Release Rate µCi/sec 6.57E-03 3.39E-02 6.47E-03 <LLD 1.17E-02
3. Percent of ODCM Limit -

gamma  % 4.07E-06 1.07E-04 4.10E-06 N/A 5.74E-05

4. Percent of ODCM Limit -

% 9.87E-06 7.97E-05 9.93E-06 N/A 4.98E-05 beta

8. Iodine Releases
1. Total lodine-131 Ci 3.09E-09 2.03E-06 9.91 E-07 1.78E-05 2.0BE-05 3.32E+01 I
2. Average Release Rate µCi/sec 3.97E-10 2.58E-07 1.25E-07 2.24E-06 6.60E-07
3. Percent of ODCM Limit  % 3.05E+OO 2.60E+OO 2.99E+OO 3.12E+OO 5.88E+OO C. Particulate(> 8-day half-life) Releases
1. Particulates with half-lives

> 8 days Ci <LLD 1.55E-06 <LLD <LLD 1.55E-06 1.98E+01 l

2. Average Release Rate µCi/sec <LLD 1.97E-07 <LLD <LLD 4.91 E-08
3. Percent of ODCM Limit  % 3.05E+OO 2.60E+OO 2.99E+OO 3.12E+OO 5.BBE+OO D. Tritium Releases
1. Total Release Activity Ci 2.88E+01 1.44E+02 4.92E+01 6.06E+01 2.82E+02 8.07E+OO I
2. Average Release Rate µCi/sec 3.70E+OO 1.83E+01 6.19E+OO 7.62E+OO 8.95E+OO
3. Percent of ODCM Limit  % 3.05E+OO 2.60E+OO 2.99E+OO 3.12E+OO 5.BBE+OO E. Gross Alpha Releases
1. Total Release Activity Ci <LLD <LLD <LLD <LLD <LLD 1.98E+01 I
2. Average Release Rate µCi/sec N/A N/A N/A N/A N/A
3. Percent of ODCM limit  % N/A N/A N/A N/A N/A F. Carbon-14 Releases
1. Total Release Activity Ci 2.17E+OO 1.86E+OO 2.13E+OO 2.22E+OO 8.39E+OO
2. Average Release Rate µCi/sec 2.BOE-01 2.36E-01 2.69E-01 2.BOE-01 2.66E-01
3. Percent of ODCM limit  % 3.05E+OO 2.60E+OO 2.99E+OO 3.12E+OO 5.88E+OO Note: ODCM LLD threshold values are included in Table 4.i of this report.

Note: The ODCM Limit is a dose based limit combined for Iodines, Particulate, Tritium and C-14.

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APPENDIX A: EFFLUENT AND WASTE DISPOSAL

SUMMARY

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TABLE 18-1 GASEOUS EFFLUENTS - MIXED MODE RELEASES - CONTINUOUS MODE UNIT 1 AND 2 Nuclides Released Continuous Mode A. Fission Gases Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ar-41 Ci <LLD <LLD <LLD <LLD <LLD Kr-85 Ci <LLD <LLD <LLD <LLD <LLD Kr-85m Ci <LLD <LLD <LLD <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD <LLD Xe-131m Ci <LLD <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD <LLD Xe-135m Ci <LLD <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD <LLD Total for Period Ci <LLD <LLD <LLD <LLD <LLD

8. Iodines I Halogens Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Br-82 Ci <LLD 6.98E-06 <LLD 8.90E-06 1.59E-05 1-131 Ci <LLD 1.62E-06 <LLD 2.27E-06 3.89E-06 1-132 Ci <LLD <LLD <LLD <LLD <LLD 1-133 Ci 4.77E-06 <LLD 7.34E-06 4.01 E-05 5.22E-05 1-134 Ci <LLD <LLD <LLD <LLD <LLD 1-135 Ci <LLD <LLD <LLD <LLD <LLD Total for Period Ci 4.77E-06 8.61 E-06 7.34E-06 5.13E-05 7.20E-05
c. Particulates Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Mn-54 Ci <LLD <LLD <LLD <LLD <LLD Co-57 Ci <LLD 1.55E-06 <LLD <LLD 1.55E-06 Co-58 Ci <LLD <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD <LLD 22 of 92

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TABLE 1B-1 (Cont.)

GASEOUS EFFLUENTS - MIXED MODE RELEASES - CONTINUOUS MODE UNIT 1 AND 2 Nuclides Released Continuous Mode

c. Particulates (Cont.) Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total La-140 Ci <LLD <LLD <LLD <LLD <LLD Total for Period Ci <LLD 1.55E-06 <LLD <LLD 1.55E-06 D. Tritium Unit Quarter 1 Quarter 2 Quarter3 Quarter 4 Total Ci 2.69E+01 1.40E+02 4.53E+01 2.36E+01 2.36E+02 E. Gross Alpha Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ci <LLD <LLD <LLD <LLD <LLD F. Carbon-14 Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ci 2.17E+OO 1.86E+OO 2.13E+OO 2.22E+OO 8.39E+OO 23 of 92

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TABLE 1B-2 GASEOUS EFFLUENTS - MIXED MODE RELEASES - BATCH MODE UNIT 1 AND 2 Nuclides Released Batch Mode A. Fission Gases Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ar-41 Ci <LLD 2.59E-02 <LLD <LLD 2.59E-02 Kr-85 Ci <LLD <LLD <LLD <LLD <LLD Kr-85m Ci <LLD 3.05E-03 <LLD <LLD 3.05E-03 Kr-87 Ci <LLD <LLD <LLD <LLD <LLD Kr-88 Ci <LLD 3.23E-03 <LLD <LLD 3.23E-03 Xe-131m Ci <LLD <LLD <LLD <LLD <LLD Xe-133 Ci 5.11 E-02 1.73E-01 5.14E-02 <LLD 2.76E-01 Xe-135 Ci <LLD 6.12E-02 <LLD <LLD 6.12E-02 Xe-135m Ci <LLD <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD <LLD Total for Period Ci 5.11 E-02 2.67E-01 5.14E-02 <LLD 3.69E-01 B. Iodines I Halogens Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Br-82 Ci 2.12E-05 1.97E-05 3.24E-05 4.75E-05 1.21 E-04 1-131 Ci 3.09E-09 4.07E-07 9.91 E-07 1.55E-05 1.69E-05 1-132 Ci <LLD 9.37E-06 1.23E-07 3.27E-05 4.22E-05 1-133 Ci 5.37E-07 1.25E-06 3.78E-06 8.12E-05 8.67E-05 1-134 Ci <LLD <LLD <LLD 3.18E-06 3.18E-06 1-135 Ci <LLD 2.83E-07 2.31 E-06 8.49E-05 8.75E-05 Total for Period Ci 2.18E-05 3.11 E-05 3.96E-05 2.65E-04 3.57E-04

c. Particulates Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Mn-54 Ci <LLD <LLD <LLD <LLD <LLD Co-57 Ci <LLD <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD <LLD 24 of 92

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TABLE 1 B-2 (Cont.)

GASEOUS EFFLUENTS - MIXED MODE RELEASES - BATCH MODEUNIT 1 AND 2 Nuclides Released Batch Mode

c. Particulates (Cont.) Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total La-140 Ci <LLD <LLD <LLD <LLD <LLD Total for Period Ci <LLD <LLD <LLD <LLD <LLD D. Tritium Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ci 1.86E+OO 3.56E+OO 3.91 E+OO 3.70E+01 4.63E+01 E. Gross Alpha Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ci <LLD <LLD <LLD <LLD <LLD F. Carbon-14 Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ci <LLD <LLD <LLD <LLD <LLD 25 of 92

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TABLE 2A LIQUID EFFLUENTS- - SUMMATION OF ALL RELEASES UNIT 1 AND 2 Est. Total Unit 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Total Error%

A. Fission and Activation Products

1. Total Release Ci 5.16E-02 3.62E-02 4.03E-03 2.64E-04 9.22E-02 2.64E+OO I
2. Average Diluted Concentration µCi/ml 4.09E-09 3.12E-09 2.56E-10 1.85E-11 1.70E-09
3. Percent of applicable limit  % * * * * *
8. Tritium
1. Total Release Ci 3.74E+02 8.61E+02 3.25E+02 8.64E+02 2.42E+03 5.85E+OO I
2. Average Diluted Concentration µCi/ml 2.97E-05 7.41 E-05 2.06E-05 6.05E-05 4.47E-05
3.  % of Limit (1 E-2 µCi/ml)  % 2.97E-01 7.41 E-01 2.06E-01 6.05E-01 4.47E-01 C. Dissolved Noble Gases
1. Total Release Ci <LLD 1.76E-05 <LLD <LLD 1.76E-05 2.64E+OO I
2. Average Diluted Concentration µCi/ml N/A 1.51E-12 N/A N/A 3.24E*13
3. % of Limit (2E-4 µCi/ml)  % N/A 7.56E-07 N/A N/A 1.62E-07 D. Gross Alpha
11. Total Release Ci <LLD <LLD <LLD <LLD <LLD I1.47E+01 I E. Volume of Waste Released liters 1.01 E+ 10 8.86E+09 1.23E+ 10 8.42E+09 3.97E+ 10 rior to dilution IF. Volume of Dilution Water liters I I I 2.49E+oe I 2. 77E+oe I 3.4BE+oe 5.86E+oe 1.46E+1o I Note: ODCM LLD threshold values are included in Table 4.i of this report.
  • This limit is equal to 10 times the concentration values in Appendix B, Table 2, Column 2 to 10CFR20.1001-20.2402, except for Dissolved Noble Gases. The limits for Dissolved Noble Gases are found the Braidwood Station ODCM, Table C-6 of ODCM Appendix C for Noble Gases.

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TABLE 2B-1 LIQUID EFFLUENTS - CONTINUOUS MODE UNIT 1 AND 2 Nuclides Released Continuous Mode A. Fission and Activation Unit Quarter 1 Quarter 2 Quarter3 Quarter 4 Total Products Mn-54 Ci <LLD <LLD <LLD <LLD <LLD Fe-55 Ci <LLD <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD <LLD Total for Period Ci <LLD <LLD <LLD <LLD <LLD

8. Tritium Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ci 3.75E-01 6.80E+01 8.39E+OO 3.96E+01 1.16E+02
c. Dissolved and Entrained Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Gases Kr-87 Ci <LLD <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD <LLD Xe-133m Ci <LLD <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD <LLD Total

. for Period Ci <LLD <LLD <LLD

<LLD <LLD D. Gross Alpha Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ci <LLD <LLD <LLD <LLD <LLD 27 of 92

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TABLE 2B-2 LIQUID EFFLUENTS- BATCH MODE UNIT 1AND2 Nuclides Released Batch Mode A. Fission and Activation Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Products Cr-51 Ci 2.03E-03 3.24E-03 <LLD <LLD 5.27E-03 Mn-54 Ci 5.90E-04 3.6BE-04 7.9BE-06 <LLD 9.66E-04 Fe-55 Ci 2.30E-02 1.0BE-02 1.B3E-03 <LLD 3.56E-02 Fe-59 Ci 6.14E-05 4.26E-04 1.0BE-04 <LLD 5.95E-04 Co-57 Ci 9.B1 E-05 4.13E-05 <LLD <LLD 1.39E-04 Co-5B Ci 1.17E-02 1.12E-02 1.12E-03 1.06E-04 2.41 E-02 Co-60 Ci 1.05E-02 7.71 E-03 6.53E-04 1.39E-04 1.90E-02 Zn-65 Ci B.15E-05 <LLD <LLD <LLD B.15E-05 Zr-95 Ci 2.9BE-04 5.24E-05 7.15E-06 <LLD 3.57E-04 Nb-95 Ci 7.27E-04 3.37E-04 2.71 E-05 <LLD 1.09E-03 Nb-97 Ci 9.19E-04 7.06E-04 9.51 E-05 1.25E-05 1.73E-03 Ag-110m Ci 7.54E-04 6.67E-04 B.94E-05 7.50E-06 1.52E-03 Sn-113 Ci 1.63E-04 9.53E-05 3.70E-06 <LLD 2.62E-04 Sb-125 Ci 6.59E-04 6.46E-04 B.97E-05 <LLD 1.39E-03 Te-123m Ci <LLD <LLD 2.25E-06 <LLD 2.25E-06 Cs-134 Ci <LLD <LLD 1.11 E-06 <LLD 1.11 E-06 Cs-137 Ci <LLD <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD Ce-144 Ci 5.77E-05 <LLD <LLD <LLD 5.77E-05 Total for Period Ci 5.16E-02 3.62E-02 4.03E-03 2.64E-04 9.22E-02 B. Tritium Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ci 3.74E+02 7.93E+02 3.17E+02 B.25E+02 2.31 E+03

c. Dissolved and Entrained Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Gases Kr-B7 Ci <LLD <LLD <LLD <LLD <LLD Kr-BB Ci <LLD <LLD <LLD <LLD <LLD Xe-133 Ci <LLD 1.76E-05 <LLD <LLD 1.76E-05 Xe-133m Ci <LLD <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD <LLD Total for Period Ci <LLD 1.76E-05 <LLD <LLD 1.76E-05 2B of 92

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TABLE 2B-2 (Cont.)

LIQUID EFFLUENTS - BATCH MODE UNIT 1 AND 2 es Released Batch Mode D. Gross Alpha Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Total Ci <LLD <LLD <LLD <LLD <LLD 29 of 92

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APPENDIX B: SOLID WASTE AND IRRADIATED FUEL SHIPMENTS 30 of 92

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A. Solid Waste Shipped Offsite for Burial or Disposal (Not Irradiated Fuel)

Total Quantity Total Activity Est. Total

1. Types of Waste (m3) Period (Ci) Error%
a. Spent resins, filter sludges, evaporator bottoms, etc. 2.09E+02 1.09E+02 Jan - Dec 2017 25
b. Dry compressible waste, contaminated equip, etc. 3.25E+02 1.12E+OO Jan - Dec 2017 25
c. Irradiated components, control rods, etc. O.OOE+OO O.OOE+OO Jan - Dec 2017 25
d. Other (oil, reverse osmosis reject water, soil, lagoon 1.46E+01 7.88E-01 Jan - Dec 2017 25 sediment)
2. Estimate of Major Nuclide Composition (By Waste Type and Class)
a. Category A - Spent Resins, Filter Sludges, Evaporator Bottoms, etc.

Waste Class Percent Waste Class Percent Isotope A Curies Abundance C Curies Abundance H-3 1.27E+01 23.61% 8.64E+OO 15.88%

C-14 2.27E+OO 4.22% 7.35E-02 0.14%

Cr-51 3.28E-02 0.06% 5.19E-03 0.01%

Mn-54 1.32E+OO 2.45% 3.71 E-01 0.68%

Fe-55 4.74E+OO 8.78% 1.75E+01 32.17%

Fe-59 2.99E-03 0.01% 1.41 E-03 0.00%

Co-58 4.58E+OO 8.48% 2.31 E-01 0.42%

Co-60 9.36E+OO 17.35% 6.64E+OO 12.21%

Ni-59 3.68E-01 0.68% 1.82E-01 0.33%

Ni-63 1.63E+01 30.18% 1.97E+01 36.22%

Zn-65 4.88E-01 0.91% 9.81 E-03 0.02%

Sr-90 1.62E-02 0.03% 9.30E-03 0.02%

Zr-95 5.43E-03 0.01% 2.31 E-02 0.04%

Nb-94 O.OOE+OO 0.00% 5.97E-03 0.01%

Nb-95 7.03E-02 0.13% 4.75E-02 0.09%

Tc-99 8.36E-03 0.02% 5.14E-02 0.09%

Ag-110m 2.89E-02 0.05% 2.14E-02 0.04%

Sb-124 2.89E-04 0.00% 4.81 E-04 0.00%

Sb-125 5.11 E-01 0.95% 1.57E-01 0.29%

1-129 O.OOE+OO 0.00% 4.76E-05 0.00%

Cs-137 8.47E-01 1.57% 5.31 E-01 0.98%

Ce-144 1.09E-02 0.02% 1.32E-02 0.02%

Pu-238 1.18E-04 0.00% 1.91 E-03 0.00%

Pu-239 1.04E-05 0.00% 5.66E-04 0.00%

Pu-241 1.40E-02 0.03% 1.40E-01 0.26%

Am-241 1.07E-05 0.00% 1.37E-03 0.00%

Cm-242 1.91 E-07 0.00% 1.93E-05 0.00%

Cm-243 1.34E-04 0.00% 3.40E-03 0.01%

Cm-244 2.23E-05 0.00% 6.28E-06 0.00%

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b. Category B - Dry Compressible Waste, Contaminated Equip, etc.

Waste Class Percent Waste Class Percent Isotope A Curies Abundance C Curies Abundance H-3 1.04E-01 9.30% O.OOE+OO 0.00%

C-14 O.OOE+OO 0.00% O.OOE+OO 0.00%

Cr-51 1.14E-02 1.02% O.OOE+OO 0.00%

Mn-54 1.32E-02 1.18% O.OOE+OO 0.00%

Fe-55 3.06E-01 27.33% O.OOE+OO 0.00%

Co-58 1.55E-01 13.83% O.OOE+OO 0.00%

Co-60 2.03E-01 18.19% O.OOE+OO 0.00%

Ni-59 1.69E-03 0.15% O.OOE+OO 0.00%

Ni-63 2.55E-01 22.79% O.OOE+OO 0.00%

Sr-90 6.35E-04 0.06% O.OOE+OO 0.00%

Zr-95 1.55E-02 1.39% O.OOE+OO 0.00%

Nb-95 2.60E-02 2.32% O.OOE+OO 0.00%

Tc-99 7.44E-04 0.07% O.OOE+OO 0.00%

Sb-125 1.04E-02 0.93% O.OOE+OO 0.00%

1-129 O.OOE+OO 0.00% O.OOE+OO 0.00%

Cs-137 3.21 E-03 0.29% O.OOE+OO 0.00%

Pu-238 1.20E-05 0.00% O.OOE+OO 0.00%

Pu-241 2.47E-04 0.02% O.OOE+OO 0.00%

Am-241 1.61 E-05 0.00% O.OOE+OO 0.00%

Cm-242 2.47E-06 0.00% O.OOE+OO 0.00%

Cm-243 2.60E-05 0.00% O.OOE+OO 0.00%

Cm-244 3.19E-05 0.00% O.OOE+OO 0.00%

c. Category C - Irradiated Components, Control Rods, etc.

Waste Class Percent Waste Class Percent Isotope A Curies Abundance C Curies Abundance None N/A N/A N/A N/A

d. Category D - Other (Oil, Reverse Osmosis Reject Water, Soil, Lagoon Sediment)

Waste Class Percent Waste Class Percent Isotope A Curies Abundance C Curies Abundance H-3 7.61 E-01 96.57% O.OOE+OO 0.00%

C-14 O.OOE+OO 0.00% O.OOE+OO 0.00%

Cr-51 2.77E-04 0.04% 3.69E-16 0.00%

Mn-54 3.54E-04 0.04% 1.91 E-08 0.00%

Fe-55 8.54E-03 1.08% O.OOE+OO 0.00%

Co-58 4.48E-03 0.57% 2.28E-11 0.00%

Co-60 5.49E-03 0.70% 2.32E-05 5.44%

Ni-59 3.53E-05 0.00% O.OOE+OO 0.00%

Ni-63 5.92E-03 0.75% O.OOE+OO 0.00%

Sr-90 1.78E-05 0.00% 5.25E-07 0.12%

Zr-95 4.39E-04 0.06% O.OOE+OO 0.00%

1-129 O.OOE+OO 0.00% O.OOE+OO 0.00%

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Isotope Waste Class Percent Waste Class Percent (cont.) A Curies Abundance C Curies Abundance Cs-137 6.22E-05 0.01% 1.90E-04 44.45%

Pu-238 2.82E-07 0.00% O.OOE+OO 0.00%

Pu-241 O.OOE+OO 0.00% O.OOE+OO 0.00%

Am-241 4.51 E-07 0.00% 5.99E-05 14.04%

Cm-242 O.OOE+OO 0.00% O.OOE+OO 0.00%

Cm-243 8.19E-07 0.00% O.OOE+OO 0.00%

Cm-244 8.18E-07 0.00% O.OOE+OO 0.00%

3. Solid Waste Disposition Number of Mode of Transportation Destination Shipments Energy Solutions-Bear Creek Facility 1 CAST Transportation 1560 Bear Creek Road Energy Solutions Services - Gallaher Rd 5 Hittman Transportation 628 Gallaher Rd.

Energy Solutions-Bear Creek Facility 9 Hittman Transportation 1560 Bear Creek Road EnergySolutions LLC.

7 Hittman Transportation Clive Disposal Site - Containerized Waste Facility EnergySolutions, LLC (Treatment Facility) 6 Hittman Transportation Clive Disposal Site - Treatment Facility Waste Control Specialists LLC 2 Hittman Transportation Compact Waste Disposal Facility Energy Solutions Services - Gallaher Rd 1 Visionary Solutions, LLC 628 Gallaher Rd B. Irradiated Fuel Shipments

1. None C. Irradiated Fuel Shipments (disposition)

No irradiated fuel shipments were dispositioned at Braidwood during January through December 2017.

D. Changes to the Process Control Program (PCP)

Revision 12 of the Process Control Program, RW-AA-100 was implemented September 29, 2017. These were administrative changes made to include references for Nine Mile Point and Fitzpatrick stations, while removing Ft. Calhoun. The changes maintain the overall conformance of solidified waste product to the existing criteria for solid wastes and were reviewed and found acceptable by onsite review.

33 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

APPENDIX C: WIND DIRECTION AND STABILITY CLASSES 34 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 0 0 0 1 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 1 0 0 0 0 1 ESE 0 0 2 0 0 0 2 SE 0 0 2 2 0 0 4 SSE 0 0 1 1 0 0 2 s 0 0 1 0 0 0 1 SSW 0 1 4 0 0 0 5 SW 0 1 1 0 1 0 3 WSW 0 0 2 0 0 0 2 w 0 2 4 6 1 5 18 WNW 0 2 17 6 0 0 25 NW 0 1 22 0 0 0 23 NNW 0 0 9 1 0 0 10 Variable 0 0 0 0 0 0 0 Total 0 8 66 16 2 5 97 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 35 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Moderately Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 0 0 0 0 1 NNE 0 0 0 0 0 0 0 NE 0 1 0 0 0 0 1 ENE 0 2 1 0 0 0 3 E 0 2 0 0 0 0 2 ESE 0 0 1 0 0 0 1 SE 0 0 1 0 0 0 1 SSE 0 0 3 1 0 0 4 s 0 1 0 0 0 0 1 SSW 0 0 2 0 1 0 3 SW 0 0 1 1 1 0 3 WSW 0 1 0 1 0 0 2 w 0 0 1 2 1 0 4 WNW 0 2 8 4 0 0 14 NW 0 0 3 1 0 0 4 NNW 0 2 3 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 0 12 24 10 3 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: 3 36 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 1 0 0 0 3 NNE 0 0 0 0 0 0 0 NE 0 1 0 0 0 0 1 ENE 0 1 0 0 0 0 1 E 0 3 0 0 0 0 3 ESE 0 3 0 0 0 0 3 SE 0 4 3 0 0 0 7 SSE 0 1 10 0 0 0 11 s 0 1 2 1 0 0 4 SSW 0 4 4 0 2 0 10 SW 0 2 3 2 0 0 7 WSW 0 3 3 0 0 0 6 w 0 0 3 2 0 0 5 WNW 0 1 4 3 0 0 8 NW 0 2 2 2 0 0 6 NNW 0 1 0 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 29 35 10 2 0 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: 3 37 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record; January - March 2017 Stability Class - Neutral - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 14 28 0 0 0 43 NNE 4 18 11 0 0 0 33 NE 7 14 13 0 0 0 34 ENE 5 16 17 0 0 0 38 E 4 8 5 0 0 0 17 ESE 2 10 2 0 0 0 14 SE 2 10 7 0 0 0 19 SSE 0 9 25 1 0 0 35 s 0 12 33 42 5 0 92 SSW 0 8 9 25 4 0 46 SW 0 5 27 15 4 0 51 WSW 1 6 4 13 0 0 24 w 1 14 20 30 4 0 69 WNW 4 23 85 25 2 0 139 NW 1 43 23 3 0 0 70 NNW 3 22 23 4 0 0 52 Variable 0 0 0 0 0 0 0 Total 35 232 332 158 19 0 776 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: 3 38 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Slightly Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 13 10 0 0 0 26 NNE 18 25 13 1 0 0 57 NE 4 28 25 0 0 0 57 ENE 16 46 22 0 0 0 84 E 23 29 10 0 0 0 62 ESE 7 32 11 1 0 0 51 SE 4 32 27 1 0 0 64 SSE 0 28 27 0 0 0 55 s 1 33 28 2 4 0 68 SSW 1 10 19 1 2 0 33 SW 0 22 52 9 1 1 85 WSW 1 18 20 0 0 0 39 w 9 25 28 9 3 0 74 WNW 17 59 39 3 0 0 118 NW 14 52 7 0 0 0 73 NNW 6 33 10 0 0 0 49 Variable 0 0 0 0 0 0 0 Total 124 485 348 27 10 1 995 Hours of calm in this stability class: 3 Hours of missing wind measurements in this stability class: 12 Hours of missing stability measurements in all stability classes: 3 39 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F}

Winds Measured at 34 Feet Wind Speed (in mph}

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

\

N 3 1 0 0 0 0 4 NNE 2 0 0 0 0 0 2 NE 2 0 0 0 0 0 2 ENE 4 0 0 0 0 0 4 E 1 2 0 0 0 0 3 ESE 4 5 0 0 0 0 9 SE 0 1 0 0 0 0 1 SSE 1 0 0 0 0 0 1 s 0 1 0 0 0 0 1 SSW 1 3 4 0 0 0 8 SW 5 2 2 0 0 0 9 WSW 1 13 0 0 0 0 14 w 11 14 1 0 0 0 26 WNW 10 5 1 0 0 0 16 NW 8 0 0 0 0 0 8 NNW 5 1 0 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 58 48 8 0 0 0 114 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 40 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 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 0 0 0 0 0 0 NE 1 0 0 0 0 0 1 ENE 1 0 0 0 0 0 1 E 0 1 0 0 0 0 1 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 1 0 0 0 0 0 1 s 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 4 0 0 0 0 0 4 WSW 3 2 0 0 0 0 5 w 3 3 0 0 0 0 6 WNW 6 0 0 0 0 0 6 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 20 6 0 0 0 0 26 Hours of calm in this stability class: 3 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 41 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 0 0 0 1 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 1 0 2 0 3 SE 0 0 0 0 3 1 4 SSE 0 0 0 2 0 0 2 s 0 0 1 1 0 0 2 SSW 0 1 0 2 0 0 3 SW 0 0 2 1 0 1 4 WSW 0 0 2 0 0 0 2 w 0 0 3 1 3 9 16 WNW 0 1 6 13 6 0 26 NW 0 0 7 17 1 0 25 NNW 0 0 1 7 1 0 9 Variable 0 0 0 0 0 0 0 Total 0 2 24 44 16 11 97 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 42 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Moderately Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 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 2 0 0 0 2 E 0 1 3 0 0 0 4 ESE 0 0 0 0 1 0 1 SE 0 0 0 1 0 0 1 SSE 0 0 2 1 1 0 4 s 0 0 1 0 0 0 1 SSW 0 1 1 1 0 1 4 SW 0 0 1 0 1 1 3 WSW 0 0 0 0 1 0 1 w 0 0 2 0 1 2 5 WNW 0 0 3 4 4 0 11 NW 0 0 2 4 0 1 7 NNW 0 0 1 3 0 0 4 Variable 0 0 0 0 0 0 0 Total 0 2 19 14 9 5 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: 3 43 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 2 0 0 0 2 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 1 0 0 0 0 1 E 0 0 2 1 0 0 3 ESE 0 1 1 0 0 0 2 SE 0 1 3 1 1 0 6 SSE 0 2 4 7 0 0 13 s 0 0 4 1 1 0 6 SSW 0 2 5 2 0 2 11 SW 0 1 1 3 0 0 5 WSW 0 2 4 0 0 0 6 w 0 0 3 0 1 1 5 WNW 0 1 1 3 2 1 8 NW 0 0 2 2 0 2 6 NNW 0 0 2 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 0 11 34 20 5 6 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: 3 44 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Neutral - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 3 20 15 0 0 40 NNE 0 4 16 6 0 0 26 NE 3 7 15 7 0 0 32 ENE 4 7 9 12 1 0 33 E 5 2 10 5 0 0 22 ESE 1 1 9 4 2 0 17 SE 0 1 6 9 0 0 16 SSE 1 4 7 18 6 0 36 s 0 3 12 19 37 22 93 SSW 0 6 7 9 17 14 53 SW 0 1 13 15 10 4 43 WSW 1 3 5 4 13 0 26 w 0 4 11 14 17 7 53 WNW 1 2 17 63 38 13 134 NW 1 3 24 40 13 6 87 NNW 2 6 20 15 6 0 49 Variable 0 0 0 0 0 0 0 Total 21 57 201 255 160 66 760 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: 3 45 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Slightly Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 12 10 0 0 26 NNE 3 9 28 11 1 0 52 NE 0 10 24 26 0 0 60 ENE 3 15 35 16 0 0 69 E 3 12 28 11 4 1 59 ESE 3 8 31 19 6 1 68 SE 1 4 24 28 9 0 66 SSE 0 2 19 30 8 0 59 s 0 1 14 28 9 3 55 SSW 0 0 23 20 10 4 57 SW 0 3 18 25 15 3 64 WSW 0 4 15 26 4 0 49 w 2 4 13 40 2 5 66 WNW 2 2 37 39 5 6 91 NW 1 7 40 42 10 0 100 NNW 1 8 32 13 0 0 54 Variable 0 0 0 0 0 0 0 Total 19 93 393 384 83 23 995 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 15 Hours of missing stability measurements in all stability classes: 3 46 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 2 7 0 0 0 10 NNE 0 2 3 0 0 0 5 NE 0 0 2 0 0 0 2 ENE 1 1 1 0 0 0 3 E 0 1 1 0 0 0 2 ESE 0 0 1 0 0 0 1 SE 1 0 4 4 0 0 9 SSE 0 0 1 0 0 0 1 s 0 0 0 0 0 0 0 SSW 0 0 0 1 0 0 1 SW 0 1 3 4 2 0 10 WSW 1 3 7 3 0 0 14 w 0 1 8 3 0 0 12 WNW 2 1 13 5 1 0 22 NW 0 6 8 2 0 0 16 NNW 0 3 4 0 0 0 7 Variable 0 0 0 0 0 0 0 Total 6 21 63 22 3 0 115 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 47 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: January - March 2017 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 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 1 0 0 0 1 NE 1 0 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 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 0 0 0 SSW 0 0 0 0 0 0 0 SW 1 2 0 0 0 0 3 WSW 2 0 1 1 0 0 4 w 0 1 3 0 0 0 4 WNW 2 2 3 0 0 0 7 NW 0 1 4 1 0 0 6 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 6 7 13 3 0 0 29 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 48 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 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 1 5 0 0 0 6 NE 0 0 1 0 0 0 1 ENE 0 0 0 0 0 0 0 E 0 3 0 0 0 0 3 ESE 0 1 0 0 0 0 1 SE 0 0 1 0 0 0 1 SSE 0 1 0 0 0 0 1 s 0 2 5 3 0 0 10 SSW 0 0 7 11 2 0 20 SW 0 1 6 4 0 0 11 WSW 0 0 7 4 0 0 11 w 0 1 19 7 0 0 27 WNW 0 3 7 0 0 0 10 NW 0 2 3 0 0 0 5 NNW 0 0 4 2 0 0 6 Variable 0 0 0 0 0 0 0 Total 0 15 65 33 2 0 115 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 16 49 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Moderately Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 3 0 0 3 NNE 0 0 3 1 0 0 4 NE 0 1 5 0 0 0 6 ENE 0 0 0 0 0 0 0 E 0 3 0 0 0 0 3 ESE 0 5 0 0 0 0 5 SE 0 1 1 0 0 0 2 SSE 0 1 0 1 0 0 2 s 0 1 2 3 0 0 6 SSW 0 0 1 1 0 0 2 SW 0 2 6 5 0 0 13 WSW 0 0 5 2 1 0 8 w 0 4 14 2 0 0 20 WNW 0 1 3 0 0 0 4 NW 0 1 0 0 0 0 1 NNW 0 1 9 0 0 0 10 Variable 0 0 0 0 0 0 0 Total 0 21 49 18 1 0 89 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: 16 50 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 4 1 0 0 5 NNE 1 1 3 0 0 0 5 NE 0 2 3 1 0 0 6 ENE 0 0 0 0 0 0 0 E 1 4 0 0 0 0 5 ESE 0 2 0 0 0 0 2 SE 0 2 5 0 0 0 7 SSE 0 2 0 0 0 0 2 s 1 3 4 3 0 0 11 SSW 0 0 3 6 0 0 9 SW 0 0 4 3 2 0 9 WSW 0 1 6 2 0 0 9 w 0 3 8 1 0 0 12 WNW 0 2 7 1 0 0 10 NW 0 4 2 0 0 0 6 NNW 0 1 3 1 0 0 5 Variable 0 0 0 0 0 0 0 Total 3 27 52 19 2 0 103 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: 16 51 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Neutral - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 10 8 3 0 0 21 NNE 2 16 20 6 0 0 44 NE 5 14 28 4 0 0 51 ENE 3 14 5 0 0 0 22 E 4 24 1 0 0 0 29 ESE 5 15 2 0 0 0 22 SE 5 15 8 0 0 0 28 SSE 1 13 11 0 0 0 25 s 3 5 5 12 2 0 27 SSW 3 6 8 9 9 0 35 SW 0 5 15 15 6 0 41 WSW 1 11 13 8 0 0 33 w 1 20 40 15 0 0 76 WNW 4 13 17 2 0 0 36 NW 2 21 3 1 0 0 27 NNW 3 7 9 6 0 0 25 Variable 0 0 0 0 0 0 0 Total 42 209 193 81 17 0 542 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 16 52 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Slightly Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 9 23 5 6 0 0 43 NNE 5 34 13 9 0 0 61 NE 17 43 36 10 1 0 107 ENE 19 56 18 0 0 0 93 E 14 39 1 0 0 0 54 ESE 6 22 1 1 0 0 30 SE 8 27 6 0 0 0 41 SSE 3 30 19 0 0 0 52 s 4 22 53 21 4 0 104 SSW 0 9 58 31 5 0 103 SW 0 26 37 16 0 0 79 WSW 4 21 15 10 0 0 so w 6 22 16 5 0 0 49 WNW 4 17 24 1 0 0 46 NW 6 13 4 0 0 0 23 NNW 8 9 9 1 0 0 27 Variable 0 0 0 0 0 0 0 Total 113 413 315 111 10 0 962 Hours of calm in this stability class: 1 Bours of missing wind measurements in this stability class: 8 Hours of missing stability measurements in all stability classes: 16 53 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 1 0 0 0 0 5 NNE 6 2 0 0 0 0 8 NE 10 1 0 0 0 0 11 ENE 20 0 0 0 0 0 20 E 19 3 0 0 0 0 22 ESE 14 10 0 0 0 0 24 SE 2 2 0 0 0 0 4 SSE 4 9 0 0 0 0 13 s 1 4 0 0 0 0 5 SSW 4 3 2 0 0 0 9 SW 0 8 0 0 0 0 8 WSW 11 39 0 0 0 0 50 w 10 8 0 0 0 0 18 WNW 7 2 0 0 0 0 9 NW 7 4 0 0 0 0 11 NNW 5 2 1 0 0 0 8 Variable 0 0 0 0 0 0 0 Total 124 98 3 0 0 0 225 Hours of calm in this stability class: 4 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability classes: 16 54 bf 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 9 0 0 0 0 0 9 NNE 3 0 0 0 0 0 3 NE 4 0 0 0 0 0 4 ENE 1 0 0 0 0 0 1 E 12 1 0 0 0 0 13 ESE 9 0 0 0 0 0 9 SE 4 0 0 0 0 0 4 SSE 1 0 0 0 0 0 1 s 2 0 0 0 0 0 2 SSW 1 1 0 0 0 0 2 SW 2 0 0 0 0 0 2 WSW 6 9 0 0 0 0 15 w 17 0 0 0 0 0 17 WNW 10 0 0 0 0 0 10 NW 0 0 0 0 0 0 0 NNW 4 0 0 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 85 11 0 0 0 0 96 Hours of calm in this stability class: 18 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 16 55 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 1 0 1 NNE 0 1 0 0 1 0 2 NE 0 0 0 6 0 0 6 ENE 0 0 0 0 0 0 0 E 0 1 0 0 0 0 1 ESE 0 3 0 0 0 0 3 SE 0 0 1 0 0 0 1 SSE 0 0 0 0 0 0 0 s 0 0 6 1 2 0 9 SSW 0 0 3 1 7 4 15 SW 0 0 4 9 3 0 16 WSW 0 0 2 2 2 0 6 w 0 0 0 11 6 0 17 WNW 0 1 4 11 8 1 25 NW 0 0 3 3 0 0 6 NNW 0 0 3 2 2 0 7 Variable 0 0 0 0 0 0 0 Total 0 6 26 46 32 5 115 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 16 56 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73}

Period of Record: April - June 2017 Stability Class - Moderately Unstable. - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 1 0 0 2 NNE 0 0 0 0 3 0 3 NE 0 1 1 7 1 0 10 ENE 0 1 0 0 0 0 1 E 0 0 1 0 0 0 1 ESE 0 2 4 0 0 0 6 SE 0 0 2 0 0 0 2 SSE 0 1 1 0 1 0 3 s 0 0 1 2 2 0 5 SSW 0 0 0 0 2 0 2 SW 0 1 2 9 1 0 13 WSW 0 0 0 3 0 0 3 w 0 0 1 9 1 2 13 WNW 0 1 3 7 3 0 14 NW 0 0 0 2 0 0 2 NNW 0 0 4 5 0 0 9 Variable 0 0 0 0 0 0 0 Total 0 7 21 45 14 2 89 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: 16 57 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 1 5 1 0 8 NNE 0 0 1 2 0 0 3 NE 0 0 2 2 1 0 5 ENE 0 1 0 1 0 0 2 E 0 0 3 0 0 0 3 ESE 0 2 1 0 0 0 3 SE 0 0 5 2 0 0 7 SSE 0 1 1 0 0 0 2 s 0 0 4 3 2 0 9 SSW 0 0 2 1 1 4 8 SW 0 0 1 5 3 3 12 WSW 0 1 2 2 0 0 5 w 0 2 1 3 3 0 9 WNW 0 1 0 11 2 0 14 NW 0 1 4 1 2 0 8 NNW 0 0 4 0 1 0 5 Variable 0 . 0 0 0 0 0 0 Total 0 10 32 38 16 7 103 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: 16 58 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Neutral - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 8 7 2 1 0 19 NNE 0 5 22 8 3 0 38 NE 1 8 8 22 12 0 51 ENE 3 11 7 6 1 0 28 E 2 16 12 1 1 0 32 ESE 2 7 9 7 0 0 25 SE 0 12 11 6 0 0 29 SSE 3 8 9 5 1 0 26 s 1 4 6 3 6 4 24 SSW 1 4 2 5 7 16 35 SW 0 4 5 12 10 8 39 WSW 1 5 7 5 7 0 25 w 0 4 16 24 11 0 55 WNW 1 5 14 20 19 1 60 NW 0 12 11 10 1 1 35 NNW 0 6 3 8 6 0 23 Variable 0 0 0 0 0 0 0 Total 16 119 149 144 86 30 544 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: 16 59 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Slightly Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 5 9 3 3 3 26 NNE 0 8 23 18 8 0 57 NE 1 14 37 30 12 5 99 ENE 0 22 32 28 3 0 85 E 2 21 48 15 1 0 87 ESE 0 4 11 11 0 0 26 SE 0 5 14 18 2 0 39 SSE 2 5 15 18 3 0 43 s 1 2 18 33 21 8 83 SSW 0 1 9 54 40 22 126 SW 1 1 27 43 13 4 89 WSW 0 1 29 11 5 1 47 w 0 4 16 15 8 1 44 WNW 1 9 16 25 3 1 55 NW 0 4 6 19 7 1 37 NNW 0 10 6 9 3 0 28 Variable 0 0 0 0 0 0 0 Total 11 116 316 350 132 46 971 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: 16 60 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F}

Winds Measured at 203 Feet Wind Speed (in mph}

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 6 6 0 0 0 13 NNE 0 0 3 0 0 0 3 NE 0 2 6 2 0 0 10 ENE 3 3 10 0 0 0 16 E 2 3 11 0 0 0 16 ESE 0 0 17 9 0 0 26 SE 0 2 7 3 0 0 12 SSE 1 2 2 2 0 0 7 s 1 8 5 4 0 0 18 SSW 0 1 2 1 0 0 4 SW 1 3 2 5 0 0 11 WSW 1 1 12 4 0 0 18 w 1 0 31 12 0 0 44 WNW 0 2 9 5 0 0 16 NW 0 2 5 1 0 0 8 NNW 1 2 6 1 0 0 10 Variable 0 0 0 0 0 0 0 Total 12 37 134 49 0 0 232 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: 16 61of92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: April - June 2017 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 1 5 0 0 0 7 NNE 5 2 2 0 0 0 9 NE 0 7 1 1 0 0 9 ENE 2 3 0 0 0 0 5 E 0 2 3 5 0 0 10 ESE 1 1 1 2 0 0 5 SE 0 2 4 1 0 0 7 SSE 0 4 0 0 0 0 4 s 0 0 2 0 0 0 2 SSW 2 1 0 0 0 0 3 SW 1 5 1 0 0 0 7 WSW 2 2 1 3 0 0 8 w 1 1 5 6 0 0 13 WNW 0 2 6 0 0 0 8 NW 0 2 10 0 0 0 12 NNW 0 2 3 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 15 37 44 18 0 0 114 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: 16 62 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT i, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F}

Winds Measured at 34 Feet Wind Speed (in mph}

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 3 6 0 0 0 10 NNE 0 3 2 0 0 0 5 NE 1 12 14 0 0 0 27 ENE 2 12 1 0 0 0 15 E 3 19 0 0 0 0 22 ESE 2 10 0 0 0 0 12 SE 1 19 1 0 0 0 21 SSE 3 25 3 0 0 0 31 s 0 15 9 0 0 0 24 SSW 0 11 14 0 0 0 25 SW 0 4 10 2 0 0 16 WSW 1 10 12 4 0 0 27 w 1 26 22 0 0 0 49 WNW 5 18 8 0 0 0 31 NW 0 20 8 0 0 0 28 NNW 0 16 6 0 0 0 22 Variable 0 0 0 0 0 0 0 Total 20 223 116 6 0 0 365 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 63 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Moderately Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 2 1 0 0 0 4 NNE 0 2 9 0 0 0 11 NE 1 1 6 0 0 0 8 ENE 1 2 0 0 0 0 3 E 2 4 0 0 0 0 6 ESE 2 6 0 0 0 0 8 SE 0 2 1 0 0 0 3 SSE 1 12 0 0 0 0 13 s 2 3 1 0 0 0 6 SSW 1 3 1 0 0 0 5 SW 0 2 0 1 0 0 3 WSW 1 6 2 0 0 0 9 w 0 9 4 0 0 0 13 WNW 2 6 2 0 0 0 10 NW 0 12 0 0 0 0 12 NNW 1 3 0 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 15 75 27 1 0 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: 3 64 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72,-73)

Period of Record: July - September 2017 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 4 2 0 0 0 8 NNE 2 7 5 0 0 0 14 NE 2 8 0 0 0 0 10 ENE 1 1 0 0 0 0 2 E 5 4 0 0 0 0 9 ESE 3 2 0 0 0 0 5 SE 2 6 0 0 0 0 8 SSE 0 8 0 0 0 0 8 s 2 2 0 0 0 0 4 SSW 1 2 1 0 0 0 4 SW 1 3 1 0 0 0 5 WSW 0 3 4 0 0 0 7 w 3 7 7 0 0 0 17 WNW 2 1 0 0 0 0 3 NW 1 4 1 0 0 0 6 NNW 2 7 1 0 0 0 10 Variable 0 0 0 0 0 0 0 Total 29 69 22 0 0 0 120 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: 3 65 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Neutral - 199Ft-30Ft Delta-T ( F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 8 3 0 0 0 15 NNE 12 10 12 0 0 0 34 NE 11 26 8 0 0 0 45 ENE 17 10 0 0 0 0 27 E 10 8 0 0 0 0 18 ESE 10 10 0 0 0 0 20 SE 9 18 1 0 0 0 28 SSE 2 17 3 0 0 0 22 s 2 8 8 0 0 0 18 SSW 1 5 8 3 0 0 17 SW 3 7 10 0 0 0 20 WSW 2 25 8 0 0 0 35 w 6 20 10 0 0 0 36 WNW 4 10 0 0 0 0 14 NW 3 18 4 0 0 0 25 NNW 4 18 4 0 0 0 26 Variable 0 0 0 0 0 0 0 Total 100 218 79 3 0 0 400 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 66 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Slightly Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 15 17 0 0 0 0 32 NNE 12 30 4 0 0 0 46 NE 28 29 0 0 0 0 57 ENE 40 16 0 0 0 0 56 E 39 7 0 0 0 0 46 ESE 20 29 0 0 0 0 49 SE 13 40 1 0 0 0 54 SSE 16 43 0 0 0 0 59 s 3 21 11 0 0 0 35 SSW 1 18 18 1 0 0 38 SW 4 24 11 1 0 0 40 WSW 13 32 5 0 0 0 50 w 16 21 5 0 0 0 42 WNW 22 10 0 0 0 0 32 NW 14 7 0 0 0 0 21 NNW 13 16 0 0 0 0 29 Variable 0 0 0 0 0 0 0 Total 269 360 55 2 0 0 686 Hours of calm in this stability class: 9 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 67 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 20 2 0 0 0 0 22 NNE 13 2 0 0 0 0 15 NE 20 0 0 0 0 0 20 ENE 32 0 0 0 0 0 32 E 42 1 0 0 0 0 43 ESE 27 6 0 0 0 0 33 SE 18 18 0 0 0 0 36 SSE 5 7 0 0 0 0 12 s 9 6 0 0 0 0 15 SSW 5 6 0 0 0 0 11 SW 7 9 0 0 0 0 16 WSW 15 16 0 0 0 0 31 w 34 4 0 0 0 0 38 WNW 18 0 0 0 0 0 18 NW 10 0 0 0 0 0 10 NNW 4 0 0 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 279 77 0 0 0 0 356 Hours of calm in this stability class: 11 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 68 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 0 0 0 0 0 5 NNE 7 0 0 0 0 0 7 NE 9 0 0 0 0 0 9 ENE 11 0 0 0 0 0 11 E 10 0 0 0 0 0 10 ESE 5 1 0 0 0 0 6 SE 1 0 0 0 0 0 1 SSE 0 0 0 0 0 0 0 s 1 0 0 0 0 0 1 SSW 1 0 0 0 0 0 1 SW 5 1 0 0 0 0 6 WSW 10 3 0 0 0 0 13 w 25 0 0 0 0 0 25 WNW 13 0 0 0 0 0 13 NW 6 0 0 0 0 0 6 NNW 5 1 0 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 114 6 0 0 0 0 120 Hours of calm in this stability class: 20 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 69 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 6 5 0 0 12 NNE 1 1 2 0 0 0 4 NE 1 6 8 6 0 0 21 ENE 2 8 5 3 0 0 18 E 1 15 10 0 0 0 26 ESE 2 8 3 1 0 0 14 SE 0 14 6 2 0 0 22 SSE 2 18 11 1 0 0 32 s 0 8 8 3 0 0 19 SSW 1 2 21 5 0 0 29 SW 0 4 4 9 0 0 17 WSW 0 5 6 0 3 0 14 w 0 12 13 11 2 0 38 WNW 0 16 20 10 0 0 46 NW 0 6 14 2 1 0 23 NNW 0 6 20 4 0 0 30 Variable 0 0 0 0 0 0 0 Total 10 130 157 62 6 0 365 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 70 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Moderately Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 1 2 0 0 0 4 NNE 0 0 0 3 0 0 3 NE 1 3 4 6 0 0 14 ENE 1 0 2 1 0 0 4 E 2 6 0 0 0 0 8 ESE 0 3 1 0 0 0 4 SE 1 5 0 1 0 0 7 SSE 2 9 2 0 0 0 13 s 0 3 0 0 0 0 3 SSW 1 3 3 1 0 0 8 SW 0 2 0 1 0 0 3 WSW 0 4 4 0 0 0 8 w 0 5 5 2 0 0 12 WNW 0 3 2 1 0 0 6 NW 0 7 4 2 0 0 13 NNW 0 5 3 0 0 0 8 Variable 0 0 0 0 0 0 0 Total 9 59 32 18 0 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: 3 71 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 4 0 0 0 8 NNE 0 3 6 2 0 0 11 NE 6 3 3 2 0 0 14 ENE 2 2 0 0 0 0 4 E 2 4 0 0 0 0 6 ESE 3 5 1 0 0 0 9 SE 2 4 1 0 0 0 7 SSE 1 5 2 0 0 0 8 s 1 2 2 0 0 0 5 SSW 0 2 0 1 0 0 3 SW 0 2 1 1 0 0 4 WSW 1 0 3 0 0 0 4 w 0 5 2 5 0 0 12 WNW 0 2 4 2 0 0 8 NW 0 2 0 3 0 0 5 NNW 2 6 4 0 0 0 12 Variable 0 0 0 0 0 0 0 Total 20 51 33 16 0 0 120 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: 3 72 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Neutral - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 6 8 0 0 0 16 NNE 5 7 7 4 0 0 23 NE 5 12 12 15 0 0 44 ENE 5 16 10 1 0 0 32 E 6 10 6 0 0 0 22 ESE 5 10 8 0 0 0 23 SE 1 11 12 1 0 0 25 SSE 1 6 17 3 0 0 27 s 2 3 7 8 0 0 20 SSW 0 5 4 5 2 0 16 SW 1 3 6 9 1 0 20 WSW 1 10 12 2 0 0 25 w 0 14 9 4 1 0 28 WNW 3 4 8 5 3 0 23 NW 2 4 11 12 0 0 29 NNW 1 10 12 4 0 0 27 Variable 0 0 0 0 0 0 0 Total 40 131 149 73 7 0 400 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 73 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Slightly Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 11 20 1 0 0 34 NNE 1 7 21 8 0 0 37 NE 0 11 28 10 0 0 49 ENE 1 25 34 1 0 0 61 E 0 17 30 0 0 0 47 ESE 1 6 19 4 0 0 30 SE 3 8 39 14 0 0 64 SSE 0 8 33 10 0 0 51 s 1 6 30 8 1 0 46 SSW 1 6 24 20 4 0 55 SW 1 7 15 13 2 1 39 WSW 5 12 26 4 2 0 49 w 1 4 26 12 0 0 43 WNW 1 6 16 7 0 0 30 NW 0 11 15 3 0 0 29 NNW 2 5 22 2 0 0 31 Variable 0 0 0 0 0 0 0 Total 20 150 398 117 9 1 695 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 74 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 3 5 0 0 0 9 NNE 0 7 9 2 0 0 18 NE 1 1 19 0 0 0 21 ENE 3 12 6 2 0 0 23 E 0 7 21 0 0 0 28 ESE 3 0 15 13 0 0 31 SE 1 11 31 3 0 0 46 SSE 2 8 19 4 0 0 33 s 0 1 17 1 0 0 19 SSW 0 4 11 2 0 0 17 SW 0 6 9 2 0 0 17 WSW 1 3 9 5 0 0 18 w 0 5 8 4 0 0 17 WNW 1 5 15 6 0 0 27 NW 0 3 19 4 0 0 26 NNW 0 8 9 0 0 0 17 Variable 0 0 0 0 0 0 0 Total 13 84 222 48 0 0 367 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 75 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: July - September 2017 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 7 7 0 0 0 14 NNE 0 1 6 0 0 0 7 NE 0 2 5 1 0 0 8 ENE 0 4 0 0 0 0 4 E 1 5 6 1 0 0 13 ESE 1 3 5 3 0 0 12 SE 0 1 4 1 0 0 6 SSE 0 2 2 0 0 0 4 s 0 1 1 0 0 0 2 SSW 2 2 0 0 0 0 4 SW 3 1 2 0 0 0 6 WSW 1 4 4 1 0 0 10 w 1 6 5 1 0 0 13 WNW 3 3 13 0 0 0 19 NW 1 3 7 0 0 0 11 NNW 0 5 1 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 13 50 68 8 0 0 139 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 76 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 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 2 0 0 0 0 2 E 0 2 0 0 0 *O 2 ESE 0 4 0 0 0 0 4 SE 0 1 2 0 0 0 3 SSE 0 5 9 0 0 0 14 s 0 2 6 4 0 0 12 SSW 0 11 5 5 0 0 21 SW 0 5 4 2 0 0 11 WSW 0 4 6 0 0 0 10 w 0 5 7 5 2 0 19 WNW 0 5 12 2 0 0 19 NW 0 5 18 0 0 0 23 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 51 69 18 2 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: 249 77 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017

  • Stability Class - Moderately Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 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 2 0 0 0 2 NE 2 3 1 0 0 0 6 ENE 0 0 1 0 0 0 1 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 1 1 0 0 0 2 SSE 0 1 2 0 0 0 3 s 0 3 4 1 1 0 9 SSW 0 2 2 1 0 0 5 SW 0 2 0 7 0 0 9 WSW 0 1 3 1 1 0 6 w 0 4 3 0 1 0 8 WNW 0 3 1 0 0 0 4 NW 0 3 2 0 0 0 5 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 2 23 23 10 3 0 61 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: 249 78 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 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 3 0 0 0 0 3 NE 0 1 4 0 0 0 5 ENE 3 0 0 0 0 0 3 E 0 1 0 0 0 0 1 ESE 0 2 0 0 0 0 2 SE 0 2 0 0 0 0 2 SSE 0 1 1 0 0 0 2 s 1 2 2 2 2 0 9 SSW 0 0 0 0 1 0 1 SW 0 2 2 2 0 0 6 WSW 0 1 1 3 0 0 5 w 0 6 3 3 3 0 15 WNW 0 1 6 1 0 0 8 NW 0 1 1 0 0 0 2 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 4 23 21 11 6 0 65 Hours of calm in this stability class: 0 I:Iours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 249 79 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Neutral - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 21 9 4 0 0 37 NNE 2 28 11 0 0 0 41 NE 6 15 11 0 0 0 32 ENE 16 14 1 0 0 0 31 E 9 8 0 0 0 0 17 ESE 0 10 4 0 0 0 14 SE 6 15 8 0 0 0 29 SSE 2 39 25 1 0 0 67 s 0 10 23 22 5 0 60 SSW 1 3 13 29 10 0 56 SW 1 13 36 6 2 0 58 WSW 3 21 30 9 0 0 63 w 10 20 45 20 3 0 98 WNW 5 28 29 2 0 0 64 NW 3 18 25 1 0 0 47 NNW 3 18 8 8 0 0 37 Variable 0 0 0 0 0 0 0 Total 70 281 278 102 20 0 751 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability clai:;s: 3 Hours of missing stability measurements in all stability classes: 249 80 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Slightly Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 18 3 0 0 0 26 NNE 8 18 3 0 0 0 29 NE 8 8 1 0 0 0 17 ENE 11 21 1 0 0 0 33 E 13 11 0 0 0 0 24 ESE 4 19 1 0 0 0 24 SE 8 35 6 0 0 0 49 SSE 4 49 27 1 0 0 81 s 3 32 21 3 0 0 59 SSW 0 13 23 1 0 0 37 SW 1 25 37 8 0 0 71 WSW 6 20 10 2 0 0 38 w 11 29 14 2 0 0 56 WNW 17 34 3 0 0 0 54 NW 12 23 7 0 0 0 42 NNW 5 37 5 1 0 0 48 Variable 0 0 0 0 0 0 0 Total 116 392 162 18 0 0 688 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 12

'Hours of missing stability measurements in all stability classes: 249 81 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 2 0 0 0 0 7 NNE 3 0 0 0 0 0 3 NE 1 0 0 0 0 0 1 ENE 0 1 0 0 0 0 1 E 11 2 0 0 0 0 13 ESE 6 4 0 0 0 0 10 SE 3 3 1 0 0 0 7 SSE 0 4 2 0 0 0 6 s 0 0 3 0 0 0 3 SSW 0 3 7 0 0 0 10 SW 3 5 7 0 0 0 15 WSW 7 4 0 0 0 0 11 w 22 14 0 0 0 0 36 WNW 17 10 0 0 0 0 27 NW 4 1 0 0 0 0 5 NNW 4 0 1 1 0 0 6 Variable 0 0 0 0 0 0 0 Total 86 53 21 1 0 0 161 Hours of calm in this stability class: 4 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 249 82 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - Decernber2017 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 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 1 1 0 0 0 0 2 NE 2 1 0 0 0 0 3 ENE 2 0 0 0 0 0 2 E 4 0 0 0 0 0 4 ESE 1 1 0 0 0 0 2 SE 1 0 0 0 0 0 1 SSE 0 0 0 0 0 0 0 s 0 0 0 0 0 0 0 SSW 1 0 0 0 0 0 1 SW 3 1 2 0 0 0 6 WSW 3 1 0 0 0 0 4 w 15 0 0 0 0 0 15 WNW 4 0 0 0 0 0 4 NW 3 0 3 0 0 0 6 NNW 3 0 3 3 1 0 10 Variable 0 0 0 0 0 0 0 Total 43 6 8 3 1 0 61 Hours of calm in this stability class: 11 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 249 83 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 1 0 0 0 0 1 ENE 0 0 1 0 0 0 1 E 0 0 3 0 0 0 3 ESE 0 2 0 0 0 0 2 SE 0 1 2 3 0 0 6 SSE 0 0 7 5 0 0 12 s 0 3 4 4 2 1 14 SSW 0 5 5 5 5 1 21 SW 0 1 8 1 0 0 10 WSW 0 4 3 1 0 2 10 w 0 0 5 6 6 1 18 WNW 0 1 10 19 4 0 34 NW 0 0 0 6 2 0 8 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 18 48 50 19 5 140 Hours of calm in this stability class: 0 Hours of mis13ing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 249 84 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Moderately Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 1 1 3 0 0 5 ENE 0 2 1 0 0 0 3 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 1 2 0 0 3 SSE 0 2 0 0 0 0 2 s 0 2 2 4 0 2 10 SSW 0 1 1 1 1 3 7 SW 0 1 2 0 1 0 4 WSW 0 0 3 2 2 2 9 w 0 3 3 3 0 0 9 WNW 0 2 1 1 0 0 4 NW 0 2 0 2 1 0 5 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 16 15 18 5 7 61 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: 249 85 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph) wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 0 0 0 1 NNE 0 0 1 0 0 0 1 NE 0 1 3 2 0 0 6 ENE 1 0 0 0 0 0 1 E 2 0 0 0 0 0 2 ESE 0 1 2 0 0 0 3 SE 0 1 2 1 0 0 4 SSE 0 0 0 0 0 0 0 s 0 1 1 1 0 4 7 SSW 0 1 0 1 2 1 5 SW 1 1 0 0 0 0 2 WSW 0 1 2 4 3 3 13 w 0 1 3 7 2 1 14 WNW 0 1 1 1 0 0 3 NW 0 0 2 1 0 0 3 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 4 9 18 18 7 9 65 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: 249 86 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Neutral - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 4 21 6 3 0 36 NNE 0 7 23 8 0 0 38 NE 0 3 24 9 1 0 37 ENE 0 20 4 0 0 0 24 E 2 13 7 2 0 0 24 ESE 1 4 6 7 1 0 19 SE 0 5 23 14 10 0 52 SSE 0 6 18 6 10 6 46 s 0 2 8 23 18 30 81 SSW 0 2 13 12 17 8 52 SW 1 5 27 30 1 0 64 WSW 1 12 10 15 6 10 54 w 1 5 13 38 15 2 74 WNW 0 9 15 31 15 1 71 NW 4 8 11 12 14 2 51 NNW 0 6 10 9 6 1 32 Variable 0 0 0 0 0 0 0 Total 12 111 233 222 117 60 755 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: 249 87 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Slightly Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 6 10 6 0 0 23 NNE 2 8 5 2 0 0 17 NE 1 8 14 2 0 0 25 ENE 0 7 15 1 0 0 23 E 1 5 8 8 0 0 22 ESE 0 5 6 10 1 0 22 SE 1 2 18 17 1 0 39 SSE 1 4 30 29 4 0 68 s 0 4 21 23 12 3 63 SSW 0 5 16 46 24 0 91 SW 0 7 22 33 3 0 65 WSW 1 5 13 11 3 0 33 w 1 6 14 32 4 0 57 WNW 2 10 14 27 0 1 54 NW 2 9 31 13 2 0 57 NNW 0 6 30 6 0 0 42 Variable 0 0 0 0 0 0 0 Total 13 97 267 266 54 4 701 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: 249 88 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph) wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 5 1 0 0 7 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 1 4 8 0 0 13 SE 0 2 6 5 0 0 13 SSE 0 2 1 5 0 0 8 s 0 0 6 1 0 0 7 SSW 1 0 3 4 0 0 8 SW 2 1 3 7 2 0 15 WSW 1 5 1 3 1 0 11 w 1 6 11 3 0 0 21 WNW 0 8 12 14 0 0 34 NW 1 5 11 3 0 0 20 NNW 0 5 1 1 1 0 8 Variable 0 0 0 0 0 0 0 Total 6 36 64 55 4 0 165 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: 249 89 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

Period of Record: October - December2017 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 4 1 0 0 5 NNE 1 0 1 0 0 0 2 NE 0 0 1 0 0 0 1 ENE 1 0 0 0 0 0 1 E 2 0 0 0 0 0 2 ESE 1 1 2 0 0 0 4 SE 0 3 0 0 0 0 3 SSE 0 1 1 0 0 0 2 s 1 1 0 0 0 0 2 SSW 1 2 0 0 0 0 3 SW 1 4 3 1 0 0 9 WSW 0 3 1 1 0 0 5 w 0 3 7 0 0 0 10 WNW 0 1 2 0 0 0 3 NW 0 2 3 5 4 0 14 NNW 2 0 2 1 0 1 6 Variable 0 0 0 0 0 0 0 Total 10 21 27 9 4 1 72 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: 249 90 of 92

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

WIND STABILITY CLASSES Table C-4 Atmospheric Stability Classes Temperature Change 3

Descri(;!tion Pasguill Stability Class cr5(degrees) with Height("C/100 m)

Extremely Unstable A >22.5 <-1.9 Moderately Unstable B 17.5 to 22.5 -1.9 to -1.7 Slightly Unstable c 12.5to 17.5 -1.7 to-1.5 Neutral D 7.5 to 12.5 -1.5 to-0.5 Slightly Stable E 3.8 to 7.5 -0.5to 1.5 Moderately Stable F 2.1to3.8 *1.5to 4.0 Extremely Stable G 0 to 2.1 >4.0 3

cra is the standard deviation of horizontal wind direction fluctuation over a period of 15 minutes to 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />.

From Regulatory Guide 1.21, Table 4B.

Atmospheric Stability Classes, Table C-4 from Braidwood ODCM.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2017 UNIT 1, 2 and ISFSI (Docket Numbers 50-456, 50-457 and 72-73)

APPENDIX D: ERRATA There were no errors to previous reports identified in 2017.

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