Text

Transmittal of 2015 Annual Radiological Environmental Operating Report
	ML16132A173
Person / Time
Site:	Braidwood
Issue date:	05/11/2016
From:	Marchionda M; Exelon Generation Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	BW160031
	Download: ML16132A173 (252)
	v • d • e

May 11, 2016 BW160031 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. STN 50-456 and STN 50-457

Subject:

2015 Annual Radiological Environmental Operating Report Attached is the 2015 Annual Radiological Environmental Operating Report for Braidwood Station. This report is being submitted in accordance with Technical Specification 5.6.2, "Annual Radiological Environmental Operating Report." This report contains information associated with the station's radiological environmental and meteorological monitoring programs. This information is consistent with the objectives described in the Offsite Dose Calculation Manual and 10 CFR 50, Appendix I, "Numerical Guides for Design Objectives and Limiting Conditions for Operation to Meet the Criterion 'As Low as is Reasonably Achievable' for Radioactive Material In Light-Water-Cooled Nuclear Power Reactor Effluents," Sections IV.B.2, IV.B.3, and IV.C. Technical Specification 5.6.2 requires the Annual Radiological Environmental Operating Report to be submitted by May 15 of each year.

If you have any questions regarding this information, please contact Steven Reynolds, Regulatory Assurance Manager, at (815) 417-2800.

Respectfully,

/hffe0 /))uJ;~

Marri Marchionda 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

Docket No: 50-456 50-457 BRAIDWOOD STATION UNITS 1 and 2 Annual Radiological Environmental Operating Report 1 January through 31 December 2015 Prepared By Teledyne Brown Engineering Environmental Services Braidwood Station Braceville, IL 60407 May 2016

Intentionally left blank Table Of Contents I. Summary and Conclusions .............................................................................................. 1 II. Introduction ..................................................................................................................... 3 A. Objectives of the REMP ...................................................................................... 3 B. Implementation of the Objectives ........................................................................ 3 III. Program Description ...................................................................................................... 3 A. Sample Collection ............................................................................................... 3 B. Sample Analysis .................................................................................................. 6 C. Data Interpretation .............................................................................................. 6 D. Program Exceptions ............................................................................................ 7 E. Program Changes ............................................................................................. 11 IV. Results and Discussion ............................................................................................... 11 A. Aquatic Environment ......................................................................................... 11

1. Surface Water......................................................................................... 11

2. Public Water ........................................................................................... 12

3. Ground/Well Water ................................................................................. 12

4. Fish ......................................................................................................... 13

5. Sediment................................................................................................. 13 B. Atmospheric Environment ................................................................................. 14

1. Airborne .................................................................................................. 14

a. Air Particulates............................................................................. 14

b. Airborne Iodine ............................................................................ 15 C. Terrestrial Environment ..................................................................................... 15

1. Milk.......................................................................................................... 15

2. Food Products ........................................................................................ 15 D. Ambient Gamma Radiation ............................................................................... 16 E. Land Use Survey ............................................................................................... 16 F. Errata Data ........................................................................................................ 17 G. Summary of Results - Inter-laboratory Comparison Program ......................... 17 i

Appendices Appendix A Radiological Environmental Monitoring Report Annual Summary Tables Table A-1 Radiological Environmental Monitoring Program Annual Summary for Braidwood Station, 2015 Appendix B Location Designation, Distance & Direction, and Sample Collection &

Analytical Methods Tables Table B-1 Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Braidwood Station, 2015 Table B-2 Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Braidwood Station, 2015 Figures Figure B-1 Inner Ring OSLD Locations of the Braidwood Station, 2015 Figure B-2 Fixed Air Sampling and Outer Ring OSLD Locations of the Braidwood Station, 2015 Figure B-3 Ingestion and Waterborne Exposure Pathway Sample Locations of the Braidwood Station, 2015 Appendix C Data Tables and Figures - Primary Laboratory Tables Table C-I.1 Concentrations of Gross Beta in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2015.

Table C-I.2 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2015.

Table C-I.3 Concentrations of Nickel-63 in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2015.

Table C-I.4 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2015.

Table C-II.1 Concentrations of Gross Beta in Public Water Samples Collected in the Vicinity of Braidwood Station, 2015.

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Table C-II.2 Concentrations of Tritium in Public Water Samples Collected in the Vicinity of Braidwood Station, 2015.

Table C-II.3 Concentrations of I-131 in Public Water Samples Collected in the Vicinity of Braidwood Station, 2015.

Table C-II.4 Concentrations of Gamma Emitters in Public Water Samples Collected in the Vicinity of Braidwood Station, 2015.

Table C-III.1 Concentrations of Tritium in Ground/Well Water Samples Collected in the Vicinity of Braidwood Station, 2015.

Table C-III.2 Concentrations of Gamma Emitters in Ground/Well Water Samples Collected in the Vicinity of Braidwood Station, 2015.

Table C-IV.1 Concentrations of Nickel-63 and Gamma Emitters in Fish Samples Collected in the Vicinity of Braidwood Station, 2015.

Table C-V.1 Concentrations of Nickel-63 and Gamma Emitters in Sediment Samples Collected in the Vicinity of Braidwood Station, 2015.

Table C-VI.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Braidwood Station, 2015.

Table C-VI.2 Monthly and Yearly Mean Values of Gross Beta Concentrations in Air Particulate Samples Collected in the Vicinity of Braidwood Station, 2015.

Table C-VI.3 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Braidwood Station, 2015.

Table C-VII.1 Concentrations of I-131 in Air Iodine Samples Collected in the Vicinity of Braidwood Station, 2015.

Table C-VIII.1 Concentrations of I-131 in Milk Samples Collected in the Vicinity of Braidwood Station, 2015.

Table C-VIII.2 Concentrations of Gamma Emitters in Milk Samples Collected in the Vicinity of Braidwood Station, 2015.

Table C-IX.1 Concentrations of Gamma Emitters in Vegetation Samples Collected in the Vicinity of Braidwood Station, 2015.

Table C-X.1 Quarterly OSLD Results for Braidwood Station, 2015.

Table C-X.2 Mean Quarterly OSLD Results for the Inner Ring, Outer Ring, Other, Control, and Independent Spent Fuel Storage Installation (ISFSI)

Locations for Braidwood Station, 2015.

Table C-X.3 Summary of the Ambient Dosimetry Program for Braidwood Station, 2015.

Figures Figure C-1 Surface Water - Gross Beta - Stations BD-10 and BD-25 (C) Collected in the Vicinity of Braidwood Station, 2000 - 2015.

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Figure C-2 Surface Water - Gross Beta - Stations BD-38 and BD-40 Collected in the Vicinity of Braidwood Station, 2007 - 2015.

Figure C-3 Surface Water - Gross Beta - Stations BD-55 and BD-56 Collected in the Vicinity of Braidwood Station, 2007 - 2015.

Figure C-4 Surface Water - Tritium - Stations BD-10 and BD-25 (C) Collected in the Vicinity of Braidwood Station, 2000 - 2015.

Figure C-5 Surface Water - Tritium - Stations BD-38 and BD-40 Collected in the Vicinity of Braidwood Station, 2006 - 2015.

Figure C-6 Surface Water - Tritium - Stations BD-55 and BD-56 Collected in the Vicinity of Braidwood Station, 2007 - 2015.

Figure C-7 Public Water - Gross Beta - Station BD-22 Collected in the Vicinity of Braidwood Station, 2000 - 2015.

Figure C-8 Public Water - Tritium - Station BD-22 Collected in the Vicinity of Braidwood Station, 2000 - 2015.

Figure C-9 Ground/Well Water - Tritium - Stations BD-13 and BD-34 Collected in the Vicinity of Braidwood Station, 2000 - 2015.

Figure C-10 Ground/Well Water - Tritium - Stations BD-35 and BD-36 Collected in the Vicinity of Braidwood Station, 2000 - 2015.

Figure C-11 Ground/Well Water - Tritium - Station BD-37 Collected in the Vicinity of Braidwood Station, 2000 - 2015.

Figure C-12 Ground/Well Water - Tritium - Stations BD-50 and BD-51 Collected in the Vicinity of Braidwood Station, 2007 - 2015.

Figure C-13 Ground/Well Water - Tritium - Stations BD-53 and BD-54 Collected in the Vicinity of Braidwood Station, 2007 - 2015.

Figure C-14 Air Particulate - Gross Beta - Stations BD-03 (C) and BD-06 Collected in the Vicinity of Braidwood Station, 2000 - 2015.

Figure C-15 Air Particulate - Gross Beta - Stations BD-19 and BD-20 Collected in the Vicinity of Braidwood Station, 2000 - 2015.

Figure C-16 Air Particulate - Gross Beta - Station BD-21 Collected in the Vicinity of Braidwood Station, 2000 - 2015.

Figure C-17 Air Particulate - Gross Beta - Stations BD-02 and BD-04 Collected in the Vicinity of Braidwood Station, 2005 - 2015.

Figure C-18 Air Particulate - Gross Beta - Station BD-05 Collected in the Vicinity of Braidwood Station, 2005 - 2015.

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Appendix D Inter-Laboratory Comparison Program Tables Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2015 Table D-2 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2015 Table D-3 DOEs Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering, 2015 Table D-4 ERA Statistical Summary Proficiency Testing Program for Environmental, Inc., 2015 Table D-5 DOEs Mixed Analyte Performance Evaluation Program (MAPEP)

Environmental, Inc., 2015 Appendix E Effluent Data Appendix F Meteorological Data Appendix G Errata Data Appendix H Annual Radiological Groundwater Protection Program Report (ARGPPR) v

I. Summary and Conclusions This report on the Radiological Environmental Monitoring Program (REMP) conducted for Exelons Braidwood Station covers the period January 1, 2015 through December 31, 2015. During that time period 1,645 analyses were performed on 1,333 samples. In assessing all the data gathered for this report and comparing these results with preoperational data, it was concluded that the operation of Braidwood Station had no adverse radiological impact on the environment.

Surface, public, and ground/well water samples were analyzed for concentrations of tritium and gamma emitting nuclides. Surface water and public water samples were also analyzed for concentrations of gross beta. Gross beta and tritium activities detected were consistent with those detected in previous years. No fission or activation products were detected. As part of an effort to implement industry best practices, both gaseous and liquid station effluents were evaluated for all 10CFR61 required nuclides. Nuclides exceeding 1% relative abundance in the waste stream were added to the list of nuclides that Teledyne Brown evaluates in potentially impacted REMP matrices. For Braidwood Station, Ni-63 exceeds 1% relative abundance in the radwaste resins. Occasionally, Ni-63 is observed in liquid release tank quarterly composites, therefore, beginning in the fall of 2013 the station requested that Ni-63 be evaluated in the downstream surface water, sediment, and fish analyses. Ni-63 has not been observed in downstream surface water.

Fish (commercially and/or recreationally important species) and sediment samples were analyzed for concentrations of gamma emitting nuclides. No fission or activation products were detected in fish. Nickel-63 was not detected in any fish or sediment samples analyzed. Two sediment samples had Cs-137.

The concentration was consistent with levels observed during the preoperational years. No plant produced fission or activation products were found in sediment.

Air particulate samples were analyzed for concentrations of gross beta and gamma emitting nuclides. No fission or activation products were detected.

High sensitivity I-131 analyses were performed on weekly air samples. All results were less than the minimum detectable concentration for I-131.

Cow milk samples were analyzed for concentrations of I-131 and gamma emitting nuclides. Iodine-131 was not detected in any milk samples.

Concentrations of naturally occurring K-40 were detected. No fission or activation products were found and all required LLDs (Lower Limit of Detection) were met.

Food Product samples were analyzed for concentrations of gamma emitting nuclides. No plant produced fission or activation products were detected.

Environmental gamma radiation measurements were performed quarterly using 1

Optically Stimulated Luminescence Dosimeters (OSLD). Beginning in 2012, Exelon changed the type of dosimetry used for the Radiological Environmental Monitoring Program (REMP). Optically Stimulated Luminescent Dosimetry were deployed and Thermo-luminescent Dosimetry (TLD) were discontinued. This change may result in a step change in readings, up or down, depending on site characteristics. The relative comparison to control locations remains valid.

OSLD technology is different than that used in a TLD but has the same purpose (to measure direct radiation).

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II. Introduction The Braidwood Station, consisting of two 3,587 MWt pressurized water reactors owned and operated by Exelon Corporation is located in Will County, Illinois.

Unit No. 1 went critical on May 29, 1987. Unit No. 2 went critical on March 08, 1988. The site is located in northeastern Illinois, 15 miles south-southwest of Joliet, Illinois, 60 miles southwest of Chicago and southwest of the Kankakee River.

This report covers those analyses performed by Teledyne Brown Engineering (TBE), Landauer Technologies and Environmental Inc. (Midwest Labs) on samples collected during the period January 1, 2015 through December 31, 2015.

A. Objective of the REMP The objectives of the REMP are to:

1. Provide data on measurable levels of radiation and radioactive materials in the site environs.

2. Evaluate the relationship between quantities of radioactive material released from the plant and resultant radiation doses to individuals from principal pathways of exposure.

B. Implementation of the Objectives The implementation of the objectives is accomplished by:

1. Identifying significant exposure pathways.

2. Establishing baseline radiological data of media within those pathways.

3. Continuously monitoring those media before and during Station operation to assess Station radiological effects (if any) on man and the environment.

III. Program Description A. Sample Collection Samples for the Braidwood Station REMP were collected for Exelon Nuclear by Environmental Inc. (Midwest Labs). This section describes the general collection methods used by Environmental Inc. (Midwest Labs) to obtain environmental samples for the Braidwood Station REMP in 2015.

Sample locations and descriptions can be found in Table B-1 and Figures B-1 through B-3, Appendix B. The sampling methods used by Environmental Inc. are listed in Table B-2.

Aquatic Environment The aquatic environment was evaluated by performing radiological analyses on samples of surface water, public water, well water, fish, and sediment. Two gallon water samples were collected weekly from six surface water locations (BD-10, BD-25 [control], BD-38, BD-40, BD-55 and BD-56), and one weekly composite samples of public drinking water at location (BD-22) and ground/well water samples collected quarterly from eight locations (BD-13, BD-34, BD-35, BD-36, BD-37, BD-50, BD-51 and BD-54). All samples were collected in new unused plastic bottles, which were rinsed with source water prior to collection. Fish samples comprising the flesh of largemouth bass, golden redhorse, freshwater drum, smallmouth bass, and common carp were collected semiannually at three locations, BD-25 (control), BD-28 and BD-41. Sediment samples composed of recently deposited substrate were collected at three locations semiannually, BD-10, BD-25 (control), and BD-57.

Atmospheric Environment The atmospheric environment was evaluated by performing radiological analyses on samples of air particulate and airborne iodine. Air particulate samples were collected and analyzed weekly at eight locations (BD-02, BD-03, BD-04, BD-05, BD-06, BD-19, BD-20 and BD-21). The control location was BD-03. Airborne iodine and particulate samples were obtained at each location, using a vacuum pump with charcoal and glass fiber filters attached. The pumps were run continuously and sampled air at the rate of approximately one cubic foot per minute. The air filters and air iodine samples were replaced weekly and sent to the laboratory for analysis.

Terrestrial Environment The terrestrial environment was evaluated by performing radiological analyses on milk and food product samples. Milk samples were collected biweekly at one location (BD-17) from May through October and monthly from November through April. Control location (BD-18) was missed twice (January 2015 and December 2015) but milk was available for the rest of 2015. All samples were collected in new unused two gallon plastic bottles from the bulk tank at each location, preserved with sodium bisulfite and shipped promptly to the laboratory. Food products were collected annually in September at five locations (BD-Control, BD-Quad 1, BD-Quad 2, BD-Quad 3 and BD-Quad 4). The control location was BD-Control. Food products were unavailable for collection in September 2015 for locations BD-Quad 1, BD-Quad 3 and BD-Quad 4. Various types of samples were collected and placed in new unused plastic bags and sent to the laboratory for analysis.

Ambient Gamma Radiation Beginning in 2012, Exelon changed the type of dosimetry used for the Radiological Environmental Monitoring Program (REMP). Optically Stimulated Luminescent Dosimeters (OSLD) were deployed and the use of Thermoluminescent Dosimeters (TLD) was discontinued. This change may result in a step change in readings, up or down, depending on site characteristics. The relative comparison to control locations remains valid. OSLD technology is different than that used in a TLD but has the same purpose (to measure direct radiation).

Each location consisted of 2 OSLDs. The OSLDs were exchanged quarterly and sent to Landauer for analysis. The OSLDs were placed at locations on and around the Braidwood Station site as follows:

An inner ring consisting of 16 locations (BD-101, BD-102, BD-103, BD-104, BD-105, BD-106, BD-107, BD-108, BD-109, BD-110, BD-111a, BD-112, BD-113a, BD-114, BD-115 and BD-116) at or near the site boundary.

An outer ring consisting of 16 locations (BD-201, BD-202, BD-203, BD-204, BD-205, BD-206, BD-207, BD-208, BD-209, BD-210, BD-211, BD-212, BD-213, BD-214, BD-215 and BD-216) extending to approximately 5 miles from the site.

An additional (other) set consisting of seven locations (BD-02, BD-04, BD-05, BD-06, BD-19, BD-20 and BD-21).

The balance of one location (BD-03) represents the control area.

The specific OSLD locations were determined by the following criteria:

1. The presence of relatively dense population;

2. Site meteorological data taking into account distance and elevation for each of the sixteen-22 1/2 degree sectors around the site

3. where estimated annual dose from Braidwood Station, if any, would be most significant.

B. Sample Analysis This section describes the general analytical methodologies used by TBE and Environmental Inc. (Midwest Labs) to analyze the environmental samples for radioactivity for the Braidwood Station REMP in 2015. The analytical procedures used by the laboratories are listed in Table B-2.

In order to achieve the stated objectives, the current program includes the following analyses:

1. Concentrations of beta emitters in public and surface water and air particulates.

2. Concentrations of gamma emitters in public, ground/well and surface water, air particulates, milk, fish, sediment and food products.

3. Concentrations of tritium in public, ground/well and surface water.

4. Concentrations of I-131 in air, milk and public water.

5. Concentrations of Ni-63 in surface water, fish and sediment.

6. Ambient gamma radiation levels at various site environs.

C. Data Interpretation The radiological and direct radiation data collected prior to Braidwood Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Braidwood Station was considered operational at initial criticality. In addition, data was compared to previous years' operational data for consistency and trending. Several factors were important in the interpretation of the data:

1. Lower Limit of Detection and Minimum Detectable Concentration The lower limit of detection (LLD) was defined as the smallest concentration of radioactive material in a sample that would yield a net count (above background) that would be detected with only a 5% probability of falsely concluding that a blank observation represents a "real" signal. The LLD was intended as a before the fact estimate of a system (including instrumentation, procedure and sample type) and not as an after the fact criteria for the presence of activity. All analyses were designed to achieve the required Braidwood Station detection capabilities for environmental sample analysis.

The MDC is the smallest concentration of radioactive material in a sample that will yield a net count, above system background, that will be detected with 95% probability with only 5% probability of falsely concluding that a blank observation represents a "real" signal. The MDC is an a postori determination.

2. Net Activity Calculation and Reporting of Results Net activity for a sample was calculated by subtracting background activity from the sample activity. Since the REMP measures extremely small changes in radioactivity in the environment, background variations may result in sample activity being lower than the background activity resulting in a negative number. An MDC was reported in all cases where positive activity was not detected.

Gamma spectroscopy results for each type of sample were grouped as follows:

For surface, ground/well water, and fish 12 nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, I-131, Cs-134, Cs-137, Ba-140 and La-140 were reported.

For public water, sediment, air particulate, milk and vegetation 11 nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, Cs-134, Cs-137, Ba-140 and La-140 were reported.

Means and standard deviations of the results were calculated. The standard deviations represent the variability of measured results for different samples rather than the single analysis uncertainty.

D. Program Exceptions For 2015 the Braidwood Station REMP had a sample recovery rate in excess of 98.3%. Sample anomalies and missed samples are listed in the tables below:

Table D-1 LISTING OF SAMPLE ANOMALIES Sample Location Collection Reason Type Code Date WW BD-34, BD-35, 01/08/15 No sample; homeowners absent; BD-36, BD-37, BD-50 water shut off. Samples collected.

01/15/15.

WW BD-54 01/08/15 No sample; valve frozen. Sample collected 01/15/15.

MI BD-17 01/08/15 No milk available. Sample collected 01/15/15.

A/I BD-21 02/05/15 No access; road not plowed. POC notified; will collect next week.

OSLD BD-21 02/05/15 No access; road not plowed. Sample collected 02/12/15.

A/I BD-02 03/05/15 No apparent reason for the low reading of 163.2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

A/I BD-21 04/30/15 Regulator malfunction; pump removed for repair. Flowrate = 72 cfh. Flow of new pump (60 cfh) used for COC.

A/I All samplers 06/25/15 Low reading at all samplers due to storm/tornado.

A/I BD-03 07/23/15 Low reading of 150.7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months due to tripped circuit breaker.

A/I BD-03 07/30/15 Low reading of 25.7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months due to tripped circuit breaker.

A/I BD-03 09/17/15 Timer malfunction; collector replaced timer. Estimated time @

167.1 hours1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months based on previous weeks time.

A/I BD-05 10/22/15 Timer malfunction; collector replaced timer. Estimated time @

168.0 hours0 days 0 hours 0 weeks 0 months based on previous weeks time.

Table D-1 LISTING OF SAMPLE ANOMALIES (continued)

Sample Location Collection Reason Type Code Date A/I BD-19 11/25/15 Low reading of 46.3 hours3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months due to recent power restoration.

A/I BD-19 12/03/15 Low vacuum of 8mHg; collector replaced pump.

PW BD-22 12/24/15 Unable to collect sample; new lock on utility building; no key available.

New key obtained by station on 12/28/15l Sample collected 12/29/15

@ 07:45.

Table D-2 LISTING OF MISSED SAMPLES Sample Location Collection Reason Type Code Date MI BD-18 01/08/15 Farmer sold cows in 2014; milk not available until 02/01/15.

SW BD-38, BD-55, 01/08/15 No sample; water frozen.

BD-56 SW BD-38, BD-55, 01/15/15 No sample; water frozen.

BD-56 SW BD-38, BD-55, 01/22/15 No sample; water frozen.

BD-56 SW BD-55, BD-56, 01/29/15 No sample; water frozen.

SW BD-38, BD-55, 02/05/15 No sample; water frozen.

BD-56 SW BD-38, BD-55, 02/12/15 No sample; water frozen.

BD-56 SW BD-38, BD-55, 02/19/15 No sample; water frozen.

BD-56 SW BD-38, BD-55, 02/26/15 No sample; water frozen.

BD-56 Table D-2 LISTING OF MISSED SAMPLES (continued)

Sample Location Collection Reason Type Code Date SW BD-25, BD-38, 03/05/15 No sample; water frozen.

BD-55, BD-56 SW BD-55, BD-56, 03/12/15 No sample; water frozen.

OSLD BD-210-2 07/02/15 OSLD found missing during quarterly exchange; collector placed rd new 3 quarter OSLD.

OSLD BD-201-1 09/01/15 OSLD found missing during monthly visual check; collector placed spare 291551 00133 8619.

OSLD BD-201-2 09/01/15 OSLD found missing during monthly visual check; collector placed spare 291551 00134 8620.

VE BD-Quad 1, 3, 4 09/23/15 After diligent search of quadrants, no root or broad leaf vegetation located.

A/I BD-19 11/19/15 No power to sampler; POC notified.

M BD-18 12/03/15 No sample available; farmer not milking at this time.

Air samples collected between the period of 08/27/15 through 09/03/15 at all locations BD-02, BD-03, BD-04, BD-05, BD-06, BD-19, BD-20, and BD-21 measured slightly elevated levels of gross beta. This is due to higher levels of dust in the air as a result of crop harvesting as expected at this time of year. The air sampler filter papers were observed to be darker than normal with a very heavy material deposition. Darker filter papers and similar results were also seen at other nearby Stations during the same time period.

Each program exception was reviewed to understand the causes of the program exception. Sampling and maintenance issues were reviewed with the personnel involved to prevent recurrence. Occasional equipment breakdowns, power outages and weather related issues were unavoidable.

The overall sample recovery rate indicates that the appropriate procedures and equipment are in place to assure reliable program implementation.

E. Program Changes There were no program changes in 2015.

IV. Results and Discussion A. Aquatic Environment

1. Surface Water Samples were taken weekly and composited monthly at six locations (BD-10, BD-25 (control), BD-38, BD-40, BD-55 and BD-56). Of these locations, only BD-10 could be affected by Braidwood Stations effluent releases as it is downstream of the NPDES permitted outfall. The following analyses were performed.

Gross Beta Samples from all locations were analyzed for concentrations of gross beta (Table C-I.1, Appendix C). Gross beta was detected in 59 of 67 samples. The values ranged from 2.3 to 12.7 pCi/L.

Concentrations detected were consistent with those detected in previous years (Figures C-1 through C-3, Appendix C).

Tritium Quarterly composites of weekly collections were analyzed for tritium activity (Table C-I.2, Appendix C). Tritium activity was detected in one sample. The value was 267 pCi/l (Figures C-4 through C-6, Appendix C).

Nickel-63 Monthly samples were analyzed for Nickel-63 activity (Table C-I.3, Appendix C). Nickel-63 was not detected and the required LLD was met.

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides (Table C-I.4, Appendix C). No nuclides were detected and all required LLDs were met.

2. Public Water Monthly composites of weekly samples were made at one location (BD-22). This location could be affected by Braidwood Stations effluent releases. The following analyses were performed:

Gross Beta Samples from the location were analyzed for concentrations of gross beta (Tables C-II.1, Appendix C). Gross beta was detected in 10 of 12 samples. The values ranged from 2.3 to 6.4 pCi/L.

Concentrations detected were consistent with those detected in previous years (Figure C-7, Appendix C).

Tritium Monthly composites of weekly samples from BD-22 were analyzed for tritium activity (Table C-II.2, Appendix C). Tritium was detected in nine of 12 samples. The concentration ranged from 220 to 572 pCi/L. Concentrations detected were consistent with those detected in previous years (Figure C-8, Appendix C).

Iodine Monthly composites of weekly samples from the location were analyzed for I-131 (Table C-II.3, Appendix C). Iodine was not detected in any samples and the required LLD was met.

Gamma Spectrometry Samples from the location were analyzed for gamma emitting nuclides (Table C-II.4, Appendix C). No nuclides were detected and all required LLDs were met.

3. Ground/Well Water Quarterly samples were collected at eight locations (BD-13, BD-34, BD-35, BD-36, BD-37, BD-50, BD-51and BD-54). The following analyses were performed:

Tritium Quarterly grab samples from the locations were analyzed for tritium activity (Table C-III.1, Appendix C). Tritium was not detected in any sample and the required LLD was met. (Figures C-9 through C-13, Appendix C).

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides (Table C-III.2, Appendix C). No nuclides were detected and all required LLDs were met.

4. Fish Fish samples comprised of largemouth bass, golden redhorse, freshwater drum, smallmouth bass, common carp, and largemouth bass were collected at three locations (BD-25, BD-28, and BD-41) semiannually. Location BD-28 could be affected by Braidwood Stations effluent releases. The following analysis was performed:

Gamma Spectrometry The edible portion of fish samples from all three locations was analyzed for gamma emitting nuclides (Table C-IV.1, Appendix C).

No fission or activation products were found. No nuclides were detected and all required LLDs were met.

5. Sediment Aquatic sediment samples were collected at three locations (BD-10, BD-25, and BD-57) semiannually. The locations at the Braidwood Station outfall to the Kanakakee River and downstream of the outfall, could be affected by Braidwood Stations effluent releases. The following analysis was performed:

Gamma Spectrometry Sediment samples from the location were analyzed for gamma emitting nuclides (Table C-V.1, Appendix C). Concentrations of the fission product Cs-137 were found at locations BD-10 and BD-57. The concentration ranged from 142 to 168 pCi/kg dry. The concentrations of Cs-137 at locations BD-10 and BD-57 were less than the required Cs-137 in sediment LLD of 180 pCi/kg dry. The activity detected was consistent with those detected in previous years (29 pCi/kg to 260 pCi/kg from 1995 to 2006). No other Braidwood fission or activation products were found and all required LLDs were met.

B. Atmospheric Environment

1. Airborne

a. Air Particulates Continuous air particulate samples were collected from eight locations on a weekly basis. The eight locations were separated into three groups: Near field samplers (BD-06, BD-19, BD-20 and BD-21), far field samplers within 10 km of the site (BD-02, BD-04 and BD-05) and the Control sampler between 10 and 30 km from the site (BD-03). The following analyses were performed:

Gross Beta Weekly samples were analyzed for concentrations of beta emitters (Table C-VI.1 and C-VI.2, Appendix C).

Detectable gross beta activity was observed at all locations.

Comparison of results among the three groups aid in determining the effects, if any, resulting from the operation of Braidwood Station. The results from the near field (Group 3

I) ranged from 5 E-03 to 38 E-02 pCi/m with a mean of 17 E-02 pCi/m3. The results from the far field (Group II) ranged 3

from 5 E-03 to 43 E-02 pCi/m with a mean of 17 E-02 pCi/m3. The results from the Control location (Group III) ranged from 6 E-03 to 32 E-02 pCi/m3 with a mean of 17 3

E-02 pCi/m . Comparison of the 2015 air particulate data with previous years data indicate no effects from the operation of Braidwood Station. In addition a comparison of the weekly mean values for 2015 indicate no notable differences among the three groups (Figures C-14 through C-18, Appendix C).

Gamma Spectrometry Weekly samples were composited quarterly and analyzed for gamma emitting nuclides (Table C-VI.3, Appendix C).

No nuclides were detected and all required LLDs were met.

b. Airborne Iodine Continuous air samples were collected from eight locations (BD-02, BD-03, BD-04, BD-05, BD-06, BD-19, BD-20 and BD-21) and analyzed weekly for I-131 (Table C-VII.1, Appendix C). All results were less than the minimum detectable concentration for I-131.

C. Terrestrial Environment

1. Milk Samples were collected from two locations (BD-17 and control location BD-18). Sampling frequencies were increased to biweekly in May and continued through October and monthly sampling was performed November through April. The following analyses were performed:

Iodine-131 Milk samples from the indicator location were analyzed for concentrations of I-131 (Table C-VIII.1, Appendix C).

Iodine-131 was not detected in any samples. All required LLDs were met.

Gamma Spectrometry Each milk sample was analyzed for concentrations of gamma emitting nuclides (Table C-VIII.2, Appendix C). No nuclides were detected and all required LLDs were met.

2. Food Products Food product samples were collected at five locations (BD-Control, BD-Quad 1, BD-Quad 2, BD-Quad 3 and BD-Quad

4) when available. Four locations, (located downwind, BD-Quad 1, BD-Quad 2, BD-Quad 3 and BD-Quad 4) could be affected by Braidwood Stations effluent releases. Food products were unavailable for collection in September 2015 for locations BD-Quad 1, BD-Quad 3 and BD-Quad 4. The following analysis was performed:

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides (Table C-IX.1, Appendix C). No nuclides were detected and all required LLDs were met.

D. Ambient Gamma Radiation Ambient gamma radiation levels were measured utilizing Optically Stimulated Luminescence Dosimeter (OSLD). Eighty Six OSLD locations were established around the site. Results of OSLD measurements are listed in Tables C-X.1 to C-X.3, Appendix C.

Most OSLD measurements were below 30 mrem/quarter, with a range of 13.8 to 31.3 mrem/quarter. A comparison of the Inner Ring, Outer Ring and Other data to the Control Location data, indicate that the ambient gamma radiation levels from all locations were similar.

E. Land Use Survey A Land Use Survey conducted during August 2015 around the Braidwood Station was performed by Environmental Inc. (Midwest Labs) for Exelon Nuclear to comply with section 12.5.2 of the Braidwood Stations Offsite Dose Calculation Manual. The purpose of the survey was to document the nearest resident, milk producing animal and garden of greater than 2

500 ft in each of the sixteen 22 1/2 degree sectors around the site. For dose calculation, a garden is assumed at the nearest residence. There were no changes required to the Braidwood Station REMP, as a result of this survey. The results of this survey are summarized below.

Distance in Miles from the Braidwood Station Reactor Buildings Sector Residence Livestock Milk Farm Miles Miles Miles (A) N 0.5 2.6 -

(B) NNE 0.9 - -

(C) NE 0.7 0.9 -

(D) ENE 0.8 3.3 -

(E) E 1.5 2.3 -

(F) ESE 2.2 2.3 -

(G) SE 2.7 2.7 -

(H) SSE 4.5 - -

(J) S 4.2 4.8 -

(K) SSW 1.3 5.3 5.5 (L) SW 0.4 1.2 -

(M) WSW 0.5 - -

(N) W 0.4 1.6 8.7 (P) WNW 0.4 - -

(Q) NW 0.4 - -

(R) NNW 0.4 - -

Distance in Miles from the Braidwood Station ISFSI PAD, 2015 Sector Residence Miles (N) W 0.7 (P) WNW 0.7 (Q) NW 0.7 (R) NNW 0.7 F. Errata Data

1. More accurate distances to the ISFSI pad were updated in the ODCM in 2015. The distances reported in the 2014 AREOR were incorrect. The distances to ISFSI OSLD dosimeters are included on page B-3. Exact distances for each location are included in Appendix G - Errata Data.

2. Page B-6, Figure B-1, Inner Ring and Other map, was updated to reflect the corrected distances there were included in the 2015 ODCM revision.

A. Summary of Results - Inter-Laboratory Comparison Program The primary and secondary laboratories analyzed Performance Evaluation (PE) samples of air particulate, air iodine, milk, soil, vegetation and water matrices (Appendix D). The PE samples supplied by Analytics Inc., Environmental Resource Associates (ERA) and DOEs Mixed Analyte Performance Evaluation Program (MAPEP) were evaluated against the following pre-set acceptance criteria:

1. Analytics Evaluation Criteria Analytics evaluation report provides a ratio of laboratory results and Analytics known value. Since flag values are not assigned by Analytics, TBE-ES evaluates the reported ratios based on internal QC requirements, which are based on the DOE MAPEP criteria.

2. ERA Evaluation Criteria ERAs evaluation report provides an acceptance range for control and warning limits with associated flag values. ERAs acceptance limits are established per the USEPA, NELAC, State Specific PT program requirements or ERAs SOP for the Generation of Performance Acceptance Limits, as applicable. The acceptance limits are either determined by a regression equation specific to each analyte or a fixed percentage limit promulgated under the appropriate regulatory document.

3. DOE Evaluation Criteria MAPEPs evaluation report provides an acceptance range with associated flag values.

The MAPEP defines three levels of performance: Acceptable (flag = A), Acceptable with Warning (flag = W), and Not Acceptable (flag = N). Performance is considered acceptable when a mean result for the specified analyte is +/- 20% of the reference value. Performance is acceptable with warning when a mean result falls in the range from +/- 20% to +/- 30% of the reference value (i.e., 20% < bias < 30%). If the bias is greater than 30%, the results are deemed not acceptable.

For the TBE laboratory, 129 out of 139 analyses performed met the specified acceptance criteria. Ten analyses (AP - Cr-51, U-234/233, Gr A, Sr-90; Soil Sr-90; Water - Ni-3, Sr-89, Sr-90, U natural; Vegetation Sr-90 samples) did not meet the specified acceptance criteria for the following reasons:

Note: The Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP) samples are created to mimic conditions found at DOE sites which do not resemble typical environmental samples obtained at commercial nuclear power facilities.

1. Teledyne Brown Engineerings Analytics June 2015 air particulate Cr-51 result of 323 +/- 45.5 pCi was higher than the known value of 233 pCi with a ratio of 1.39. The upper ratio of 1.30 (acceptable with warning) was exceeded. The air particulate sample is counted at a distance above the surface of the detector to avoid detector summing which could alter the results. Chromium-51 has the shortest half-life (27.7 days) and the lowest gamma energy (320.08 keV) of this mixed nuclide sample. Additionally, Cr-51 has only one gamma energy and also has a low intensity (9.38 gamma photons produced per 100 disintegrations). This geometry produces a larger error for the Cr-51 and other gamma emitters as any distance from the detector decreases the counting rate and the probability of accurately detecting the nuclide energy. Taking into consideration the uncertainty, the activity of Cr-51 overlaps with the known value at a ratio of 1.19, which would statistically be considered acceptable. NCR 15-18

2. Teledyne Brown Engineerings MAPEP March 2015 soil Sr-90 result of 286 Total Bq/kg was lower than the known value of 653 Bq/kg, exceeding the lower acceptance range of 487 Bq/kg. The failure was due to incomplete digestion of the sample. Incomplete digestion of samples causes some of the sample to be left behind and is not present in the digested sample utilized for analysis. The procedure has been updated to include a more robust digestion using stirring during the heating phase. The MAPEP September 2014 soil Sr-90 series prior to this study was evaluated as acceptable with a result of 694 and an acceptance range of 601 -

1115 Bq/kg. The MAPEP September 2015 series soil Sr-90 after this study was evaluated as acceptable with a result of 429 and an acceptance range of 298 - 553 Bq/kg. We feel the issue is specific to the March 2015 MAPEP sample. NCR 15-13

3. Teledyne Brown Engineerings MAPEP March 2015 air particulate U-234/233 result of 0.0211 +/- 0.0120 Bq/sample was higher than the known value of 0.0155 Bq/sample, exceeding the upper acceptance range of 0.0202 Bq/sample. Although evaluated as a failure, taking into consideration the uncertainty, TBEs result would overlap with the known value, which is statistically considered acceptable. MAPEP spiked the sample with significantly more U-238 activity (a found to known ratio of 0.96) than the normal U-234/233. Due to the extremely low activity, it was difficult to quantify the U-234/233. NCR 15-13

4. Teledyne Brown Engineerings MAPEP March 2015 air particulate gross alpha result of 0.448 Bq/sample was lower than the known value of 1.77 Bq/sample, exceeding the lower acceptance range of 0.53 Bq/sample. The instrument efficiency used for gross alpha is determined using a non-attenuated alpha standard. The MAPEP filter has the alphas embedded in the filter, requiring an attenuated efficiency. When samples contain alpha particles that are embedded in the sample media, due to the size of the alpha particle, some of the alpha particles are absorbed by the media and cannot escape to be counted. When the sample media absorbs the alpha particles this is known as self-absorption or attenuation.

The calibration must include a similar configuration/media to correct for the attenuation. In order to correct the low bias, TBE will create an attenuated efficiency for MAPEP air particulate filters.

The MAPEP September series air particulate gross alpha result of 0.47 Bq/sample was evaluated as acceptable with a range of 0.24

- 1.53 Bq/sample. Unlike the MAPEP samples, air particulate Gross alpha analyses for power plants are not evaluated as a direct count sample. Power plant air particulate filters for gross alpha go through an acid digestion process prior to counting and the digested material is analyzed. NCR 15-13

5. Teledyne Brown Engineerings MAPEP September water Ni-63 result of 11.8 +/- 10.8 Bq/L was higher than the known value of 8.55 Bq/L, exceeding the upper acceptance range of 11.12 Bq/L. The Ni-63 half-life is approximately 100 years. Nickel-63 is considered to be a soft or low energy beta emitter, which means that the beta energy is very low. The maximum beta energy for Ni-63 is approximately 65 keV, much lower than other more common nuclides such as Co-60 (maximum beta energy of 1549 keV). The original sample was run with a 10 mL aliquot which was not sufficient for the low level of Ni-63 in the sample. The rerun aliquot of 30 mL produced an acceptable result of 8.81 Bq/L. NCR 15-21

6. Teledyne Brown Engineerings MAPEP September air particulate Sr-90 result of 1.48 Bq/sample was lower than the known value of 2.18 Bq/sample, exceeding the lower acceptance range of 1.53 Bq/sample. In the past, MAPEP has added substances (unusual compounds found in DOE complexes) to various matrices that have resulted in incomplete removal of the isotope of interest for the laboratories analyzing the cross checks. TBE suspects that this may be the cause of this error. Many compounds, if not properly accounted for or removed in the sample matrix, can cause interferences to either indicate lower activity or higher activity. TBE will no longer analyze the air particulate Sr-90 through MAPEP but will participate in the Analytics cross check program to perform both Sr-89 and Sr-90 in the air particulate matrix. NCR 15-21

7. Teledyne Brown Engineerings MAPEP September vegetation Sr-90 result of 0.386 Bq/sample was lower than the known value of 1.30 Bq/sample, exceeding the lower acceptance range of 0.91 Bq/sample. In the past, MAPEP has added substances (unusual compounds found in DOE complexes) to various matrices that have resulted in incomplete removal of the isotope of interest for the laboratories analyzing the cross checks. TBE suspects that this maybe the cause of this error. Many compounds, if not properly accounted for or removed in the sample matrix, can cause interferences to either indicate lower activity or higher activity.

Results from previous performance evaluations were reviewed and shown to be acceptable. NCR 15-21

8. & 9.Teledyne Brown Engineerings ERA May water Sr-89/90 results of 45.2 and 28.0 pCi/L, respectively were lower than the known values of 63.2 and 41.9 pCi/L, respectively, exceeding the lower acceptance limits of 51.1 and 30.8 pCi/L, respectively. The yields were on the high side of the TBE acceptance range, which indicates the present of excess calcium contributed to the yield, resulting in low results. NCR 15-09

10. Teledyne Brown Engineerings ERA November water Uranium natural result of 146.9 pCi/L was higher than the known value of 56.2 pCi/L, exceeding the upper acceptance limit of 62.4 pCi/L.

The technician failed to dilute the original sample, but used the entire 12 mL sample. When the results were recalculated without the dilution and using the 12 mL aliquot, the result of 57.16 agreed with the assigned value of 56.2. NCR 15-19 The Inter-Laboratory Comparison Program provides evidence of in control counting systems and methods, and that the laboratories are producing accurate and reliable data.

Intentionally left blank APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT ANNUAL

SUMMARY

Intentionally left blank TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2015 NAME OF FACILITY: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 2015 LOCATION OF FACILITY: BRACEVILLE, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER GR-B 67 4 5.5 6.7 9.1 BD-40 INDICATOR 0 (PCI/LITER) (48/55) (11/12) (12/12) BRAIDWOOD STATION COOLING LAKE (2.3/12.7) (3.9/12.7) (6.0/12.7) ONSITE H-3 24 200 267 <LLD 267 BD-10 INDICATOR 0 (1/20) (1/4) KANKAKEE RIVER DOWNSTREAM 5.4 MILES NE OF SITE NI-63 67 30 <LLD <LLD - 0 A-1 GAMMA 67 MN-54 15 <LLD <LLD - 0 CO-58 15 <LLD <LLD - 0 FE-59 30 <LLD <LLD - 0 CO-60 15 <LLD <LLD - 0 ZN-65 30 <LLD <LLD - 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2015 NAME OF FACILITY: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 2015 LOCATION OF FACILITY: BRACEVILLE, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER NB-95 15 <LLD <LLD - 0 (PCI/LITER)

ZR-95 30 <LLD <LLD - 0 I-131 15 <LLD <LLD - 0 A-2 CS-134 15 <LLD <LLD - 0 CS-137 18 <LLD <LLD - 0 BA-140 60 <LLD <LLD - 0 LA-140 15 <LLD <LLD - 0 PUBLIC WATER GR-B 12 4 3.7 NA 3.7 BD-22 INDICATOR 0 (PCI/LITER) (10/12) (10/12) WILMINGTON (2.3/6.4) (2.3/6.4) 6.0 MILES NE OF SITE

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2015 NAME OF FACILITY: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 2015 LOCATION OF FACILITY: BRACEVILLE, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS PUBLIC WATER H-3 12 200 330 NA 330 BD-22 INDICATOR 0 (PCI/LITER) (9/12) (9/12) WILMINGTON (220/572) (220/572) 6.0 MILES NE OF SITE I-131 12 1 <LLD NA - 0 GAMMA 12 MN-54 15 <LLD NA - 0 A-3 CO-58 15 <LLD NA - 0 FE-59 30 <LLD NA - 0 CO-60 15 <LLD NA - 0 ZN-65 30 <LLD NA - 0 NB-95 15 <LLD NA - 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2015 NAME OF FACILITY: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 2015 LOCATION OF FACILITY: BRACEVILLE, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS PUBLIC WATER ZR-95 30 <LLD NA - 0 (PCI/LITER)

CS-134 15 <LLD NA - 0 CS-137 18 <LLD NA - 0 A-4 BA-140 60 <LLD NA - 0 LA-140 15 <LLD NA - 0 GROUND WATER H-3 32 200 <LLD NA - 0 (PCI/LITER)

GAMMA 30 MN-54 15 <LLD NA - 0 CO-58 15 <LLD NA - 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2015 NAME OF FACILITY: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 2015 LOCATION OF FACILITY: BRACEVILLE, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GROUND WATER FE-59 30 <LLD NA - 0 (PCI/LITER)

CO-60 15 <LLD NA - 0 ZN-65 30 <LLD NA - 0 A-5 NB-95 15 <LLD NA - 0 ZR-95 30 <LLD NA - 0 I-131 15 <LLD NA - 0 CS-134 15 <LLD NA - 0 CS-137 18 <LLD NA - 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2015 NAME OF FACILITY: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 2015 LOCATION OF FACILITY: BRACEVILLE, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GROUND WATER BA-140 60 <LLD NA - 0 (PCI/LITER)

LA-140 15 <LLD NA - 0 FISH NI-63 12 260 <LLD <LLD - 0 (PCI/KG WET)

A-6 GAMMA 12 MN-54 130 <LLD <LLD - 0 CO-58 130 <LLD <LLD - 0 FE-59 260 <LLD <LLD - 0 CO-60 130 <LLD <LLD - 0 ZN-65 260 <LLD <LLD - 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2015 NAME OF FACILITY: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 2015 LOCATION OF FACILITY: BRACEVILLE, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS FISH NB-95 NA <LLD <LLD - 0 (PCI/KG WET)

ZR-95 NA <LLD <LLD - 0 I-131 NA <LLD <LLD - 0 A-7 CS-134 130 <LLD <LLD - 0 CS-137 150 <LLD <LLD - 0 BA-140 NA <LLD <LLD - 0 FISH LA-140 NA <LLD <LLD - 0 (PCI/KG WET)

SEDIMENT NI-63 6 260 <LLD <LLD - 0 (PCI/KG DRY)

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2015 NAME OF FACILITY: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 2015 LOCATION OF FACILITY: BRACEVILLE, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SEDIMENT GAMMA 6 (PCI/KG DRY) MN-54 NA <LLD <LLD - 0 CO-58 NA <LLD <LLD - 0 FE-59 NA <LLD <LLD - 0 A-8 CO-60 NA <LLD <LLD - 0 ZN-65 NA <LLD <LLD - 0 NB-95 NA <LLD <LLD - 0 ZR-95 NA <LLD <LLD - 0 CS-134 150 <LLD <LLD - 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2015 NAME OF FACILITY: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 2015 LOCATION OF FACILITY: BRACEVILLE, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SEDIMENT CS-137 180 155 <LLD 168 BD-10 INDICATOR 0 (PCI/KG DRY) (2/4) (1/2) KANKAKEE RIVER DOWNSTREAM (142/168) 5.4 MILES NE OF SITE BA-140 NA <LLD <LLD - 0 LA-140 NA <LLD <LLD - 0 A-9 AIR PARTICULATE GR-B 412 10 17 17 18 BD-04 INDICATOR 0 (E-3 PCI/CU.METER) (361/362) (50/50) (52/52) ESSEX (5/43) (6/32) (5/34) 4.8 MILES SSE OF SITE GAMMA 32 MN-54 NA <LLD <LLD - 0 CO-58 NA <LLD <LLD - 0 FE-59 NA <LLD <LLD - 0 CO-60 NA <LLD <LLD - 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2015 NAME OF FACILITY: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 2015 LOCATION OF FACILITY: BRACEVILLE, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS AIR PARTICULATE ZN-65 NA <LLD <LLD - 0 (E-3 PCI/CU.METER)

NB-95 NA <LLD <LLD - 0 ZR-95 NA <LLD <LLD - 0 A-10 CS-134 50 <LLD <LLD - 0 CS-137 60 <LLD <LLD - 0 BA-140 NA <LLD <LLD - 0 LA-140 NA <LLD <LLD - 0 AIR IODINE GAMMA 411 (E-3 PCI/CU.METER) I-131 70 <LLD <LLD - 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2015 NAME OF FACILITY: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 2015 LOCATION OF FACILITY: BRACEVILLE, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS MILK I-131 36 1 <LLD NA - 0 (PCI/LITER)

GAMMA 36 MN-54 NA <LLD NA - 0 CO-58 NA <LLD NA - 0 A-11 FE-59 NA <LLD NA - 0 CO-60 NA <LLD NA - 0 ZN-65 NA <LLD NA - 0 NB-95 NA <LLD NA - 0 ZR-95 NA <LLD NA - 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2015 NAME OF FACILITY: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 2015 LOCATION OF FACILITY: BRACEVILLE, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS MILK CS-134 15 <LLD NA - 0 (PCI/LITER)

CS-137 18 <LLD NA - 0 BA-140 60 <LLD NA - 0 A-12 LA-140 15 <LLD NA - 0 VEGETATION GAMMA 4 (PCI/KG WET) MN-54 NA <LLD <LLD - 0 CO-58 NA <LLD <LLD - 0 FE-59 NA <LLD <LLD - 0 CO-60 NA <LLD <LLD - 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2015 NAME OF FACILITY: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 2015 LOCATION OF FACILITY: BRACEVILLE, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS VEGETATION ZN-65 NA <LLD <LLD - 0 (PCI/KG WET)

NB-95 NA <LLD <LLD - 0 ZR-95 NA <LLD <LLD - 0 A-13 CS-134 60 <LLD <LLD - 0 CS-137 80 <LLD <LLD - 0 BA-140 NA <LLD <LLD - 0 LA-140 NA <LLD <LLD - 0 DIRECT RADIATION OSLD-QUARTERLY 341 NA 20.9 20.6 26.3 BD-105-4 INDICATOR 0 (MILLIREM/QTR.) (333/333) (8/8) (4/4)

(13.8/31.3) (19.1/23.8) (22.8/31.3) 0.20 MILES SE

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

Intentionally left blank APPENDIX B LOCATION DESIGNATION, DISTANCE & DIRECTION, AND SAMPLE COLLECTION & ANALYTICAL METHODS

TABLE B-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Braidwood Station, 2015 Location Location Description Distance & Direction From Site A. Surface Water BD-10 Kankakee River Downstream (indicator) 5.4 miles NE BD-25 Kankakee River Upstream (control) 9.6 miles E BD-38 Main Drainage Ditch (indicator) 1.5 miles SE BD-40 Braidwood Station Cooling Lake (indicator) Onsite BD-55 North Pond Fatlan Site (indicator) 0.6 miles NE BD-56 South Pond Fatlan Site (indictor) 0.6 miles NE B. Drinking (Potable) Water BD-22 Wilmington (indicator) 6.0 miles NE C. Ground/Well Water BD-13 Braidwood City Hall Well (indicator) 1.7 miles NNE BD-34 Gibson Well (indicator) 4.7 miles E BD-35 Joly Well (indicator) 4.7 miles E BD-36 Hutton Well (indicator) 4.7 miles E BD-37 Nurczyk Well (indicator) 4.7 miles E BD-50 Skole Well (indicator) 4.7 miles E BD-51 Fatlan Well (indicator) 0.6 miles NE BD-54 Cash Well (indicator) 0.9 miles NE D. Milk - bi-weekly / monthly BD-17 Halpins Dairy (indicator) 5.5 miles SSW BD-18 Biros Farm (control) 8.7 miles W E. Air Particulates / Air Iodine BD-02 Custer Park (indicator) 5.0 miles E BD-03 County Line Road (control) 6.2 miles ESE BD-04 Essex (indicator) 4.8 miles SSE BD-05 Gardner (indicator) 5.5 miles SW BD-06 Godley (indicator) 0.5 miles WSW BD-19 Nearsite NW (indicator) 0.3 miles NW BD-20 Nearsite N (indicator) 0.6 miles N BD-21 Nearsite NE (indicator) 0.5 miles NE F. Fish BD-25 Kankakee River, Upstream (control) 9.6 miles E BD-28 Kankakee River, Discharge (indicator) 5.4 miles E BD-41 Cooling Lake (indicator) 1.0 mile E G. Sediment BD-10 Kankakee River, Downstream (indicator) 5.4 miles NE BD-25 Kankakee River Upstream (control) 9.6 miles E BD-57 Circulating Water Blowdown Discharge (indicator) 5.4 miles E B-1

TABLE B-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Braidwood Station, 2015 Location Location Description Distance & Direction From Site H. Food Products Quadrant 1 Clark Farm 3.8 miles ENE Quadrant 2 W.F. Soltwisch 4.5 miles SSE Quadrant 3 Terri Schultz 4.8 miles SSW Quadrant 4 Bruce Sinkular 1.9 miles NNW Control Gorman Farm 9.0 miles NE I. Environmental Dosimetry - OSLD Inner Ring BD-101-3 and -4 0.5 miles N BD-102-1 and -2 1.1 miles NNE BD-103-1 and -2 1.0 mile NE BD-104-1 and -2 0.7 miles ENE BD-105-1 and -2 2.2 miles E BD-106-1 and -2 2.5 miles ESE BD-107-1 and -2 3.2 miles SE BD-108-1 and -2 3.2 miles SSE BD-109-1 and -2 3.8 miles S BD-110-1 and -2 2.8 miles SSW BD-111a-1 and -2 1.4 miles SW BD-112-1 and -2 0.7 miles WSW BD-113a-1 and -2 0.5 miles W BD-114-1 and -2 0.4 miles WNW BD-115-1 and -2 0.3 miles NW BD-116-1 0.4 miles NNW BD-116-2 0.5 miles NNW Outer Ring BD-201-1 and -2 4.2 miles N BD-202-1 and -2 4.8 miles NNE BD-203-1 and -2 4.9 miles NE BD-204-1 and -2 4.3 miles ENE BD-205-1 and -2 4.0 miles E BD-206-1 and -2 4.5 miles ESE BD-207-1 and -2 4.5 miles SE BD-208-1 and -2 4.5 miles SSE BD-209-1 and -2 4.8 miles S BD-210-1 and -2 5.3 miles SSW BD-211-1 and -2 4.8 miles SW BD-212-3 and -4 5.0 miles WSW BD-213-3 and -4 4.8 miles W BD-214-1 and -2 4.3 miles WNW BD-215-1 and -2 4.5 miles NW BD-216-1 and -2 4.0 miles NNW Other BD-02-1 and -2 Custer Park (indicator) 5.0 miles E BD-04-1 and -2 Essex (indicator) 4.8 miles SSE BD-05-1 and -2 Gardner (indicator) 5.5 miles SW BD-06-1 and -2 Godley (indicator) 0.5 miles WSW BD-19-1 and -2 Nearsite NW (indicator) 0.3 miles NW BD-20-1 and -2 Nearsite N (indicator) 0.6 miles N BD-21-1 and -2 Nearsite NE (indicator) 0.5 miles NE B-2

TABLE B-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Braidwood Station, 2015 Location Location Description Distance & Direction From Site I. Environmental Dosimetry - OSLD (contd)

Control BD-03-1 and -2 13000 W. Road 6.2 miles ESE ISFSI BD-104-3 and -4 0.12 miles E BD-105-3 and -4 0.22 miles SE BD-110-3 and -4 0.17 miles SE Distance in Miles from the Braidwood Station ISFSI Pad, 2015 Sector Residence Miles (N) W 0.7 (P) WNW 0.7 (Q) NW 0.7 (R) NNW 0.7 Distance in Miles from the Braidwood Station Reactor Buildings, 2015 Sector Residence Livestock Milk Farm Miles Miles Miles (A) N 0.5 2.6 -

(B) NNE 0.9 - -

(C) NE 0.7 0.9 -

(D) ENE 0.8 3.3 -

(E) E 1.5 2.3 -

(F) ESE 2.2 2.3 -

(G) SE 2.7 2.7 -

(H) SSE 4.5 - -

(J) S 4.2 4.8 -

(K) SSW 1.3 5.3 5.5 (L) SW 0.4 1.2 -

(M) WSW 0.5 - -

(N) W 0.4 1.6 8.7 (P) WNW 0.4 - -

(Q) NW 0.4 - -

(R) NNW 0.4 - -

B-3

TABLE B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Braidwood Station, 2015 Sample Medium Analysis Sampling Method Analytical Procedure Number Surface Water Gamma Spectroscopy Monthly composite TBE, TBE-2007 Gamma emitting radioisotope analysis from weekly grab samples.

Surface Water Gross Beta Monthly composite TBE, TBE-2008 Gross Alpha and/or Gross Beta activity in from weekly grab various matrices samples.

Surface Water Tritium Quarterly composite TBE, TBE-2011 Tritium analysis in drinking water by liquid from weekly grab scintillation samples.

Surface Water Nickel-63 Monthly composite TBE, TBE-2013 Radionickel activity in various matrices from weekly grab samples.

Drinking Water Gross Beta Monthly composite TBE, TBE-2008 Gross Alpha and/or Gross Beta activity in from weekly various matrices composite samples.

Drinking Water Gamma Spectroscopy Monthly composite TBE, TBE-2007 Gamma emitting radioisotope analysis from weekly composite samples.

Drinking Water Tritium Monthly composite TBE, TBE-2011 Tritium analysis in drinking water by liquid from weekly scintillation composite samples.

Drinking Water Iodine Monthly composite TBE, TBE-2031 Radioactive Iodine in drinking water from weekly composite samples.

Ground/Well Water Gamma Spectroscopy Quarterly grab TBE, TBE-2007 Gamma emitting radioisotope analysis samples.

Ground/Well Water Tritium Quarterly grab TBE, TBE-2011 Tritium analysis in drinking water by liquid samples. scintillation Fish Nickel-63 Semi-annual samples TBE, TBE-2013 Radionickel activity in various matrices collected via electroshocking or other techniques Fish Gamma Spectroscopy Samples collected TBE-2007 Gamma emitting radioisotope analysis twice annually via electro-shocking or other techniques Sediment Gamma Spectroscopy Semi-annual grab TBE, TBE-2007 Gamma emitting radioisotope analysis samples Sediment Nickel-63 Semi-annual grab TBE, TBE-2013 Radionickel activity in various matrices samples B-4

TABLE B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Braidwood Station, 2015 Sample Analysis Sampling Method Analytical Procedure Number Medium Air Particulates Gross Beta One-week composite TBE, TBE-2008 Gross Alpha and/or gross beta activity in of continuous air various matrices sampling through glass fiber filter paper Air Particulates Gamma Spectroscopy Quarterly composite TBE, TBE-2007 Gamma emitting radioisotope analysis of each station Air Iodine Gamma Spectroscopy Weekly composite of TBE, TBE-2007 Gamma emitting radioisotope analysis continuous air sampling through charcoal filter Milk I-131 Bi-weekly grab TBE, TBE-2012 Radioiodine in various matrices sample May through October. Monthly all other times Milk Gamma Spectroscopy Bi-weekly grab TBE, TBE-2007 Gamma emitting radioisotope analysis sample May through October. Monthly all other times Food Products Gamma Spectroscopy Annual grab TBE, TBE-2007 Gamma emitting radioisotope analysis samples.

OSLD Optically Stimulated Quarterly OSLDs Landauer Incorporated Luminescence comprised of two Dosimetry Al2O3:C Landauer Incorporated elements.

B-5

Figure B-1 Inner Ring and Other OSLD Locations of the Braidwood Station, 2015 B-6

OSLD Locations Figure B-2 Fixed Air Sampling and Outer Ring OSLD Locations of the Braidwood Station, 2015 B-7

Figure B-3 Ingestion and Waterborne Exposure Pathway Sample Locations of the Braidwood Station, 2015 B-8

Intentionally left blank APPENDIX C DATA TABLES AND FIGURES PRIMARY LABORATORY

Intentionally left blank Table C-I.1 CONCENTRATIONS OF GROSS BETA IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BD-10 BD-25 BD-38 BD-40 BD-55 BD-56 PERIOD 01/08/15 - 01/29/15 6.2 +/- 2.2 12.7 +/- 3.4 5.4 +/- 3.0 (1) 10.0 +/- 2.9 (1) (1) 02/05/15 - 02/26/15 4.5 +/- 2.0 11.8 +/- 2.9 (1) 8.3 +/- 2.4 (1) (1) 03/19/15 - 03/26/15 5.3 +/- 2.0 5.8 +/- 2.4 3.9 +/- 2.1 6.0 +/- 2.4 2.6 +/- 1.7 < 2.4 (1) 04/01/15 - 04/30/15 3.6 +/- 2.5 6.7 +/- 2.9 7.2 +/- 3.3 11.1 +/- 3.4 2.8 +/- 1.8 < 3.6 05/07/15 - 05/28/15 3.3 +/- 2.0 4.5 +/- 2.2 4.0 +/- 2.2 6.4 +/- 2.4 < 2.5 < 3.0 06/04/15 - 06/25/15 4.7 +/- 2.0 6.1 +/- 2.3 < 3.1 7.2 +/- 2.4 3.1 +/- 1.8 < 2.9 07/02/15 - 07/30/15 4.0 +/- 1.8 6.9 +/- 2.2 < 3.1 9.0 +/- 2.4 3.5 +/- 1.7 4.8 +/- 2.0 08/06/15 - 08/27/15 5.2 +/- 2.1 4.9 +/- 2.1 5.5 +/- 2.6 11.7 +/- 2.6 3.2 +/- 1.7 5.2 +/- 2.2 09/03/15 - 09/24/15 3.4 +/- 1.8 3.9 +/- 1.8 3.3 +/- 2.2 8.7 +/- 2.4 2.3 +/- 1.5 5.1 +/- 2.0 10/01/15 - 10/29/15 3.4 +/- 1.9 < 2.7 3.4 +/- 2.2 7.8 +/- 2.4 2.5 +/- 1.6 5.6 +/- 2.1 11/05/15 - 11/25/15 3.9 +/- 1.9 4.7 +/- 2.1 8.8 +/- 3.1 12.7 +/- 3.0 3.3 +/- 1.7 6.7 +/- 2.3 12/03/15 - 12/31/15 3.3 +/- 1.7 5.5 +/- 1.9 4.4 +/- 2.1 10.5 +/- 2.5 3.7 +/- 1.6 4.8 +/- 2.0 MEAN 4.2 +/- 1.9 6.7 +/- 5.8 5.1 +/- 3.7 9.1 +/- 4.2 3.0 +/- 0.9 5.4 +/- 1.4 Table C-I.2 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BD-10 BD-25 BD-38 BD-40 BD-55 BD-56 PERIOD 01/08/15 - 03/26/15 267 +/- 139 < 199 < 198 < 199 < 195 < 196 04/01/15 - 06/25/15 < 188 < 185 < 191 < 189 < 183 < 187 07/02/15 - 09/24/15 < 187 < 196 < 196 < 197 < 194 < 193 10/01/15 - 12/31/15 < 188 < 190 < 187 < 189 < 185 < 187 MEAN 267 +/- 0 - - - - -

Table C-I.3 CONCENTRATIONS OF NI-63 IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BD-10 BD-25 BD-38 BD-40 BD-55 BD-56 PERIOD 01/29/15 - 01/29/15 < 17 < 18 < 17 (1) < 16 (1) (1) 02/05/15 - 02/26/15 < 25 < 25 (1) < 21 (1) (1) 03/19/15 - 03/26/15 < 14 < 14 < 15 < 15 < 14 (1) < 14 (1) 04/01/15 - 04/30/15 < 14 < 16 < 14 < 14 < 14 < 15 05/07/15 - 05/28/15 < 4 < 4 < 4 < 4 < 4 < 4 06/04/15 - 06/25/15 < 28 < 28 < 28 < 29 < 27 < 28 07/02/15 - 07/30/15 < 14 < 14 < 11 < 14 < 13 < 13 08/06/15 - 08/27/15 < 15 < 15 < 15 < 15 < 15 < 4 09/03/15 - 09/24/15 < 16 < 16 < 15 < 15 < 15 < 15 10/01/15 - 10/29/15 < 18 < 18 < 18 < 18 < 17 < 17 11/05/15 - 11/25/15 < 15 < 15 < 14 < 15 < 14 < 14 12/03/15 - 12/31/15 < 14 < 14 < 14 < 14 < 14 < 14 MEAN - -

THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-1

Table C-I.4 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-10 01/08/15 - 01/29/15 < 4 < 4 < 9 < 4 < 7 < 5 < 8 < 13 < 4 < 5 < 30 < 9 02/05/15 - 02/26/15 < 1 < 2 < 4 < 2 < 3 < 2 < 3 < 9 < 1 < 1 < 16 < 6 03/05/15 - 03/26/15 < 4 < 4 < 8 < 3 < 7 < 4 < 6 < 10 < 3 < 4 < 23 < 8 04/01/15 - 04/30/15 < 1 < 2 < 4 < 2 < 3 < 2 < 3 < 9 < 1 < 1 < 16 < 5 05/07/15 - 05/28/15 < 1 < 2 < 4 < 1 < 3 < 2 < 3 < 9 < 1 < 2 < 15 < 5 06/04/15 - 06/25/15 < 4 < 4 < 9 < 4 < 7 < 4 < 8 < 14 < 4 < 4 < 27 < 8 07/02/15 - 07/30/15 < 1 < 2 < 4 < 1 < 3 < 2 < 3 < 9 < 1 < 1 < 15 < 5 08/06/15 - 08/27/15 < 3 < 4 < 9 < 3 < 8 < 4 < 7 < 12 < 4 < 4 < 28 < 10 09/03/15 - 09/24/15 < 8 < 8 < 12 < 8 < 16 < 7 < 13 < 14 < 7 < 7 < 38 < 12 10/01/15 - 10/29/15 < 2 < 3 < 6 < 3 < 5 < 3 < 5 < 11 < 2 < 3 < 22 < 7 C-2 11/05/15 - 11/25/15 < 4 < 5 < 10 < 4 < 9 < 5 < 9 < 14 < 4 < 5 < 33 < 10 12/03/15 - 12/31/15 < 4 < 4 < 8 < 4 < 7 < 4 < 6 < 14 < 3 < 4 < 30 < 10 MEAN - - - - - - - - - - - -

BD-25 01/08/15 - 01/29/15 < 5 < 6 < 13 < 6 < 10 < 5 < 8 < 12 < 4 < 5 < 31 < 11 02/05/15 - 02/26/15 < 2 < 2 < 5 < 2 < 3 < 2 < 4 < 12 < 2 < 2 < 19 < 7 03/12/15 - 03/26/15 < 3 < 4 < 8 < 4 < 7 < 4 < 6 < 11 < 4 < 4 < 26 < 8 04/01/15 - 04/30/15 < 2 < 2 < 6 < 2 < 4 < 3 < 5 < 14 < 2 < 2 < 23 < 6 05/07/15 - 05/28/15 < 3 < 3 < 6 < 2 < 5 < 3 < 5 < 12 < 2 < 3 < 23 < 8 06/04/15 - 06/25/15 < 4 < 5 < 9 < 4 < 8 < 6 < 8 < 14 < 4 < 5 < 32 < 12 07/02/15 - 07/30/15 < 3 < 3 < 7 < 3 < 6 < 3 < 5 < 14 < 2 < 3 < 26 < 9 08/06/15 - 08/27/15 < 3 < 3 < 8 < 4 < 7 < 4 < 6 < 13 < 3 < 3 < 25 < 9 09/03/15 - 09/24/15 < 7 < 5 < 13 < 7 < 14 < 7 < 10 < 13 < 6 < 6 < 34 < 7 10/01/15 - 10/29/15 < 2 < 2 < 4 < 1 < 3 < 2 < 3 < 7 < 1 < 1 < 14 < 4 11/05/15 - 11/25/15 < 3 < 3 < 7 < 3 < 7 < 3 < 7 < 12 < 3 < 3 < 22 < 6 12/03/15 - 12/31/15 < 4 < 5 < 10 < 4 < 9 < 5 < 8 < 13 < 4 < 4 < 27 < 11 MEAN - - - - - - - - - - - -

Table C-I.4 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-38 01/29/15 - 01/29/15 < 4 < 5 < 10 < 5 < 8 < 5 < 9 < 14 < 5 < 5 < 30 < 9 02/05/15 - 02/26/15 (1) 03/12/15 - 03/26/15 < 4 < 4 < 8 < 4 < 7 < 4 < 6 < 11 < 4 < 4 < 25 < 8 04/01/15 - 04/30/15 < 2 < 2 < 5 < 2 < 3 < 2 < 3 < 11 < 2 < 2 < 18 < 6 05/07/15 - 05/28/15 < 2 < 2 < 4 < 2 < 3 < 2 < 3 < 9 < 1 < 2 < 16 < 5 06/04/15 - 06/25/15 < 5 < 5 < 11 < 5 < 10 < 5 < 10 < 13 < 4 < 6 < 27 < 9 07/02/15 - 07/30/15 < 2 < 2 < 3 < 1 < 3 < 2 < 3 < 10 < 1 < 2 < 17 < 5 08/06/15 - 08/27/15 < 1 < 1 < 3 < 1 < 3 < 2 < 3 < 7 < 1 < 1 < 12 < 4 09/03/15 - 09/24/15 < 6 < 6 < 13 < 6 < 15 < 7 < 13 < 12 < 6 < 7 < 30 < 9 10/01/15 - 10/29/15 < 3 < 3 < 7 < 2 < 6 < 3 < 5 < 11 < 2 < 3 < 23 < 8 C-3 11/05/15 - 11/25/15 < 4 < 4 < 8 < 3 < 8 < 4 < 7 < 13 < 4 < 4 < 29 < 8 12/03/15 - 12/31/15 < 4 < 5 < 10 < 4 < 8 < 5 < 9 < 15 < 4 < 5 < 32 < 9 MEAN - - - - - - - - - - - -

BD-40 01/08/15 - 01/29/15 < 5 < 6 < 13 < 8 < 10 < 6 < 9 < 14 < 4 < 6 < 39 < 15 02/05/15 - 02/26/15 < 1 < 2 < 3 < 1 < 3 < 2 < 3 < 10 < 1 < 1 < 16 < 4 03/05/15 - 03/26/15 < 4 < 5 < 9 < 4 < 8 < 4 < 8 < 11 < 4 < 5 < 26 < 7 04/01/15 - 04/30/15 < 1 < 1 < 3 < 1 < 2 < 1 < 3 < 7 < 1 < 1 < 13 < 3 05/07/15 - 05/28/15 < 2 < 2 < 4 < 2 < 4 < 2 < 4 < 11 < 2 < 2 < 20 < 6 06/04/15 - 06/25/15 < 4 < 4 < 10 < 6 < 7 < 4 < 7 < 15 < 4 < 4 < 28 < 10 07/02/15 - 07/30/15 < 1 < 2 < 4 < 1 < 3 < 2 < 3 < 10 < 1 < 2 < 17 < 5 08/06/15 - 08/27/15 < 3 < 4 < 9 < 3 < 8 < 4 < 7 < 12 < 3 < 4 < 26 < 8 09/03/15 - 09/24/15 < 5 < 5 < 12 < 5 < 11 < 6 < 7 < 12 < 5 < 6 < 31 < 8 10/01/15 - 10/29/15 < 2 < 2 < 4 < 2 < 3 < 2 < 4 < 9 < 2 < 2 < 17 < 5 11/05/15 - 11/25/15 < 4 < 5 < 10 < 5 < 7 < 5 < 8 < 12 < 4 < 5 < 31 < 14 12/03/15 - 12/31/15 < 3 < 5 < 9 < 5 < 8 < 5 < 9 < 14 < 4 < 5 < 28 < 8 MEAN - - - - - - - - - - - -

(1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION

Table C-I.4 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-55 01/08/15 - 01/29/15 (1) 02/05/15 - 02/26/15 (1) 03/19/15 - 03/26/15 < 6 < 6 < 12 < 6 < 11 < 6 < 11 < 15 < 5 < 6 < 34 < 10 04/01/15 - 04/30/15 < 2 < 3 < 5 < 2 < 5 < 3 < 5 < 15 < 2 < 2 < 24 < 7 05/07/15 - 05/28/15 < 2 < 2 < 5 < 2 < 3 < 2 < 3 < 10 < 2 < 2 < 19 < 6 06/04/15 - 06/25/15 < 4 < 4 < 9 < 6 < 8 < 4 < 7 < 15 < 4 < 4 < 29 < 9 07/02/15 - 07/30/15 < 2 < 2 < 6 < 2 < 4 < 2 < 4 < 12 < 2 < 2 < 20 < 7 08/06/15 - 08/27/15 < 3 < 3 < 7 < 4 < 6 < 4 < 7 < 11 < 3 < 3 < 23 < 7 09/03/15 - 09/24/15 < 7 < 7 < 17 < 6 < 11 < 6 < 12 < 11 < 6 < 7 < 36 < 11 10/01/15 - 10/29/15 < 2 < 3 < 5 < 2 < 5 < 3 < 5 < 11 < 2 < 2 < 20 < 6 C-4 11/05/15 - 11/25/15 < 4 < 5 < 10 < 4 < 9 < 5 < 8 < 14 < 4 < 4 < 34 < 9 12/03/15 - 12/31/15 < 4 < 4 < 10 < 4 < 8 < 4 < 7 < 12 < 4 < 4 < 27 < 9 MEAN - - - - - - - - - - - -

BD-56 01/08/15 - 01/29/15 (1) - - - - - - - - - - - -

02/05/15 - 02/26/15 (1) - - - - - - - - - - - -

03/19/15 - 03/26/15 < 5 < 6 < 13 < 6 < 9 < 6 < 9 < 14 < 5 < 6 < 32 < 11 04/01/15 - 04/30/15 < 2 < 2 < 5 < 2 < 4 < 2 < 4 < 11 < 2 < 2 < 20 < 8 05/07/15 - 05/28/15 < 2 < 2 < 5 < 2 < 4 < 2 < 3 < 10 < 2 < 2 < 16 < 6 06/04/15 - 06/25/15 < 5 < 5 < 12 < 4 < 10 < 5 < 9 < 15 < 4 < 5 < 34 < 11 07/02/15 - 07/30/15 < 2 < 2 < 4 < 2 < 4 < 2 < 3 < 10 < 2 < 2 < 18 < 7 08/06/15 - 08/27/15 < 4 < 4 < 9 < 4 < 8 < 4 < 7 < 13 < 3 < 4 < 28 < 9 09/03/15 - 09/24/15 < 5 < 6 < 11 < 5 < 11 < 5 < 9 < 10 < 6 < 5 < 29 < 8 10/01/15 - 10/29/15 < 2 < 2 < 5 < 2 < 4 < 2 < 4 < 10 < 2 < 2 < 19 < 6 11/05/15 - 11/25/15 < 4 < 4 < 10 < 4 < 9 < 4 < 6 < 13 < 3 < 4 < 30 < 10 12/03/15 - 12/31/15 < 4 < 4 < 9 < 4 < 8 < 5 < 7 < 12 < 3 < 4 < 27 < 10 MEAN - - - - - - - - - - - -

(1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION

Table C-II.1 CONCENTRATIONS OF GROSS BETA IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BD-22 PERIOD 12/31/14 - 01/29/15 2.3 +/- 1.5 01/29/15 - 02/26/15 4.0 +/- 1.6 02/26/15 - 04/01/15 6.4 +/- 1.8 04/01/15 - 04/30/15 2.5 +/- 1.4 04/30/15 - 05/28/15 < 2.0 05/28/15 - 07/02/15 3.8 +/- 1.6 07/02/15 - 07/30/15 < 2.2 07/30/15 - 08/27/15 3.8 +/- 1.5 08/27/15 - 10/01/15 3.0 +/- 1.5 10/01/15 - 10/29/15 3.3 +/- 1.6 10/29/15 - 12/03/15 3.9 +/- 1.7 12/03/15 - 12/31/15 3.7 +/- 1.4 MEAN 3.7 +/- 2.3 Table C-II.2 CONCENTRATIONS OF TRITIUM IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BD-22 PERIOD 12/31/14 - 01/29/15 280 +/- 112 01/29/15 - 02/26/15 364 +/- 137 02/26/15 - 04/01/15 329 +/- 140 04/01/15 - 04/30/15 < 196 04/30/15 - 05/28/15 < 173 05/28/15 - 07/02/15 272 +/- 128 07/02/15 - 07/30/15 278 +/- 135 07/30/15 - 08/27/15 257 +/- 124 08/27/15 - 10/01/15 < 195 10/01/15 - 10/29/15 220 +/- 125 10/29/15 - 12/03/15 572 +/- 152 12/03/15 - 12/31/15 395 +/- 134 MEAN 330 +/- 212 Table C-II.3 CONCENTRATIONS OF I-131 IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BD-22 PERIOD 12/31/14 - 01/29/15 < 0.8 01/29/15 - 02/26/15 < 0.8 02/26/15 - 04/01/15 < 0.7 04/01/15 - 04/30/15 < 0.6 04/30/15 - 05/28/15 < 0.8 05/28/15 - 07/02/15 < 0.7 07/02/15 - 07/30/15 < 0.8 07/30/15 - 08/27/15 < 0.6 08/27/15 - 10/01/15 < 0.9 10/01/15 - 10/29/15 < 0.8 10/29/15 - 12/03/15 < 0.3 12/03/15 - 12/31/15 < 0.3 MEAN -

THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES C-5

Table C-II.4 CONCENTRATIONS OF GAMMA EMITTERS IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-22 12/31/14 - 01/29/15 < 2 < 2 < 4 < 1 < 3 < 2 < 3 < 1 < 1 < 19 < 7 01/29/15 - 02/26/15 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 1 < 1 < 16 < 4 02/26/15 - 04/01/15 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 1 < 1 < 17 < 6 04/01/15 - 04/30/15 < 1 < 1 < 2 < 1 < 2 < 1 < 1 < 1 < 1 < 16 < 4 04/30/15 - 05/28/15 < 1 < 1 < 2 < 1 < 2 < 1 < 2 < 1 < 1 < 18 < 5 05/28/15 - 07/02/15 < 2 < 2 < 5 < 2 < 4 < 2 < 4 < 2 < 2 < 21 < 6 07/02/15 - 07/30/15 < 2 < 2 < 5 < 2 < 4 < 2 < 4 < 2 < 2 < 21 < 7 07/30/15 - 08/27/15 < 2 < 2 < 4 < 1 < 3 < 2 < 3 < 2 < 2 < 18 < 5 08/27/15 - 10/01/15 < 2 < 2 < 5 < 2 < 5 < 2 < 4 < 2 < 2 < 24 < 7 10/01/15 - 10/29/15 < 2 < 3 < 6 < 2 < 5 < 3 < 5 < 3 < 3 < 23 < 6 C-6 10/29/15 - 12/03/15 < 7 < 7 < 15 < 4 < 12 < 8 < 12 < 6 < 6 < 38 < 12 12/03/15 - 12/31/15 < 5 < 4 < 9 < 4 < 10 < 5 < 8 < 5 < 4 < 31 < 8 MEAN - - - - - - - - - - -

Table C-III.1 CONCENTRATIONS OF TRITIUM IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BD-13 BD-34 BD-35 BD-36 BD-37 BD-50 BD-51 BD-54 PERIOD 01/15/15 - 01/15/15 < 159 < 190 < 191 < 191 < 195 < 190 < 154 < 195 04/09/15 - 04/09/15 < 200 < 200 < 200 < 199 < 200 < 198 < 197 < 200 07/10/15 - 07/10/15 < 184 < 188 < 193 < 179 < 193 < 193 < 193 < 190 10/06/15 - 10/06/15 < 184 < 199 < 200 < 196 < 200 < 199 < 195 < 200 MEAN - - - - - - - -

C-7

Table C-III.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-13 01/08/15 - 01/08/15 < 5 < 7 < 10 < 7 < 16 < 6 < 9 < 12 < 6 < 6 < 34 < 10 04/09/15 - 04/09/15 < 4 < 5 < 11 < 4 < 9 < 6 < 8 < 14 < 4 < 5 < 28 < 8 07/10/15 - 07/10/15 < 5 < 5 < 12 < 7 < 13 < 7 < 9 < 10 < 5 < 6 < 29 < 9 10/06/15 - 10/06/15 < 5 < 5 < 11 < 6 < 12 < 6 < 11 < 12 < 5 < 6 < 34 < 9 MEAN - - - - - - - - - - - -

BD-34 01/15/15 - 01/15/15 < 5 < 5 < 9 < 5 < 10 < 5 < 8 < 8 < 4 < 5 < 24 < 8 04/09/15 - 04/09/15 < 4 < 4 < 8 < 3 < 8 < 4 < 6 < 12 < 4 < 4 < 24 < 8 07/10/15 - 07/10/15 < 7 < 7 < 16 < 7 < 16 < 7 < 11 < 12 < 6 < 7 < 34 < 12 10/06/15 - 10/06/15 < 5 < 5 < 8 < 4 < 9 < 6 < 9 < 15 < 6 < 5 < 33 < 8 MEAN - - - - - - - - - - - -

C-8 BD-35 01/15/15 - 01/15/15 < 6 < 6 < 11 < 7 < 13 < 7 < 11 < 14 < 6 < 9 < 36 < 13 04/09/15 - 04/09/15 < 3 < 5 < 5 < 4 < 6 < 5 < 7 < 12 < 4 < 4 < 28 < 13 07/10/15 - 07/10/15 < 5 < 4 < 10 < 6 < 10 < 5 < 9 < 8 < 5 < 5 < 21 < 8 10/06/15 - 10/06/15 < 6 < 6 < 12 < 5 < 12 < 6 < 11 < 12 < 5 < 6 < 33 < 11 MEAN - - - - - - - - - - - -

BD-36 01/15/15 - 01/15/15 < 7 < 8 < 16 < 5 < 15 < 8 < 13 < 14 < 7 < 8 < 36 < 11 04/09/15 - 04/09/15 < 3 < 4 < 8 < 3 < 6 < 4 < 6 < 10 < 3 < 3 < 22 < 6 07/10/15 - 07/10/15 < 4 < 4 < 10 < 5 < 9 < 5 < 8 < 8 < 5 < 5 < 24 < 6 10/06/15 - 10/06/15 < 4 < 7 < 12 < 7 < 9 < 7 < 11 < 14 < 7 < 6 < 35 < 11 MEAN - - - - - - - - - - - -

BD-37 01/15/15 - 01/15/15 < 6 < 5 < 12 < 5 < 10 < 6 < 9 < 10 < 5 < 5 < 28 < 8 04/09/15 - 04/09/15 < 5 < 4 < 10 < 5 < 9 < 5 < 9 < 13 < 4 < 4 < 28 < 10 07/10/15 - 07/10/15 < 5 < 5 < 8 < 6 < 10 < 5 < 8 < 8 < 5 < 5 < 23 < 8 10/06/15 - 10/06/15 < 5 < 5 < 11 < 5 < 10 < 6 < 10 < 12 < 5 < 5 < 28 < 9 MEAN - - - - - - - - - - - -

Table C-III.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-50 01/15/15 - 01/15/15 < 5 < 6 < 11 < 6 < 14 < 7 < 10 < 11 < 6 < 7 < 31 < 10 04/09/15 - 04/09/15 < 5 < 5 < 11 < 6 < 11 < 5 < 9 < 14 < 5 < 5 < 32 < 10 07/10/15 - 07/10/15 < 6 < 7 < 11 < 6 < 8 < 6 < 9 < 10 < 6 < 8 < 32 < 9 10/06/15 - 10/06/15 < 4 < 6 < 14 < 4 < 10 < 5 < 7 < 11 < 4 < 4 < 30 < 12 MEAN - - - - - - - - - - - -

BD-51 01/08/15 - 01/08/15 < 4 < 5 < 8 < 5 < 9 < 5 < 8 < 8 < 4 < 5 < 24 < 8 04/09/15 - 04/09/15 < 4 < 5 < 11 < 5 < 9 < 5 < 9 < 14 < 5 < 4 < 29 < 8 07/10/15 - 07/10/15 < 8 < 9 < 19 < 9 < 18 < 8 < 14 < 11 < 7 < 9 < 37 < 15 10/06/15 - 10/06/15 < 6 < 7 < 14 < 7 < 15 < 8 < 13 < 15 < 7 < 7 < 38 < 10 MEAN - - - - - - - - - - - -

C-9 BD-54 01/15/15 - 01/15/15 < 7 < 5 < 14 < 5 < 12 < 7 < 8 < 10 < 5 < 8 < 26 < 11 04/09/15 - 04/09/15 < 5 < 6 < 13 < 5 < 11 < 7 < 12 < 14 < 5 < 6 < 36 < 13 07/10/15 - 07/10/15 < 5 < 7 < 13 < 6 < 12 < 7 < 12 < 10 < 6 < 7 < 29 < 8 10/06/15 - 10/06/15 < 6 < 6 < 9 < 7 < 11 < 6 < 9 < 13 < 6 < 6 < 29 < 11 MEAN - - - - - - - - - - - -

Table C-IV.1 CONCENTRATIONS OF NICKEL-63 AND GAMMA EMITTERS IN FISH SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA SITE COLLECTION Ni-63 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-25 Golden Redhorse 05/04/15 < 39 < 59 < 56 < 132 < 58 < 107 < 67 < 121 < 695 < 51 < 54 < 1050 < 377 Freshwater Drum 05/04/15 < 39 < 79 < 97 < 219 < 68 < 137 < 105 < 173 < 930 < 66 < 76 < 1259 < 249 Golden Redhorse 10/22/15 < 38 < 41 < 58 < 115 < 60 < 109 < 53 < 96 < 281 < 53 < 43 < 520 < 96 Smallmouth Bass 10/22/15 < 33 < 65 < 84 < 194 < 127 < 165 < 86 < 124 < 254 < 87 < 79 < 539 < 69 MEAN - - - - - - - - - - - - -

BD-28 Golden Redhorse 05/04/15 < 37 < 56 < 70 < 160 < 68 < 118 < 87 < 148 < 747 < 68 < 57 < 1105 < 306 Common Carp 05/04/15 < 38 < 70 < 85 < 212 < 63 < 157 < 90 < 171 < 1032 < 81 < 78 < 1291 < 404 Golden Redhorse 10/22/15 < 41 < 66 < 85 < 153 < 28 < 140 < 56 < 116 < 218 < 64 < 62 < 499 < 73 C-10 Smallmouth Bass 10/22/15 < 43 < 65 < 84 < 222 < 66 < 235 < 119 < 195 < 290 < 85 < 98 < 592 < 157 MEAN - - - - - - - - - - - - -

BD-41 Largemouth Bass 05/04/15 < 40 < 63 < 76 < 167 < 57 < 128 < 67 < 136 < 742 < 56 < 67 < 1041 < 275 Common Carp 05/04/15 < 32 < 51 < 70 < 138 < 47 < 136 < 69 < 110 < 694 < 51 < 52 < 965 < 247 Largemouth Bass 10/22/15 < 34 < 56 < 47 < 157 < 55 < 119 < 78 < 130 < 188 < 55 < 53 < 441 < 106 Common Carp 10/22/15 < 35 < 55 < 73 < 167 < 72 < 162 < 67 < 150 < 247 < 81 < 90 < 426 < 111 MEAN - - - - - - - - - - - - -

Table C-V.1 CONCENTRATIONS OF NICKEL-63 AND GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/KG DRY +/- 2 SIGMA SITE COLLECTION Ni-63 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-10 05/14/15 < 255 < 68 < 79 < 189 < 99 < 202 < 100 < 156 < 70 168 +/- 88 < 571 < 132 10/06/15 < 239 < 127 < 103 < 283 < 90 < 206 < 127 < 211 < 109 < 146 < 626 < 136 MEAN - - - - - - - - - - - -

BD-25 05/14/15 < 253 < 83 < 89 < 220 < 72 < 203 < 115 < 190 < 88 < 141 < 583 < 179 10/06/15 < 227 < 78 < 68 < 213 < 97 < 232 < 98 < 167 < 95 < 100 < 473 < 107 MEAN - - - - - - - - - - - -

BD-57 05/14/15 < 238 < 106 < 97 < 254 < 101 < 275 < 123 < 195 < 92 142 +/- 85 < 740 < 258 10/06/15 < 225 < 74 < 69 < 107 < 82 < 194 < 86 < 142 < 48 < 104 < 442 < 82 C-11 MEAN - - - - - - - - - - - -

Table C-VI.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA GROUP III -

CONTROL COLLECTION GROUP I - NEAR FIELD GROUP II - FAR FIELD LOCATION PERIOD BD-06 BD-19 BD-20 BD-21 BD-02 BD-04 BD-05 BD-03 12/31/14 - 01/08/15 31 +/- 5 25 +/- 4 21 +/- 4 26 +/- 5 28 +/- 5 22 +/- 4 30 +/- 5 18 +/- 4 01/08/15 - 01/15/15 21 +/- 5 22 +/- 5 17 +/- 4 18 +/- 4 21 +/- 5 21 +/- 5 22 +/- 5 22 +/- 5 01/15/15 - 01/22/15 23 +/- 5 28 +/- 5 21 +/- 5 26 +/- 5 18 +/- 4 23 +/- 5 22 +/- 5 20 +/- 5 01/22/15 - 01/29/15 14 +/- 4 9 +/- 4 12 +/- 4 14 +/- 4 13 +/- 4 13 +/- 4 12 +/- 4 16 +/- 4 01/29/15 - 02/05/15 13 +/- 4 12 +/- 4 13 +/- 4 19 +/- 3 13 +/- 4 17 +/- 4 15 +/- 4 16 +/- 4 02/05/15 - 02/12/15 23 +/- 4 21 +/- 4 20 +/- 4 (1) 21 +/- 4 22 +/- 4 22 +/- 4 24 +/- 4 02/12/15 - 02/19/15 23 +/- 5 21 +/- 5 23 +/- 5 22 +/- 5 19 +/- 5 17 +/- 5 20 +/- 5 25 +/- 5 02/19/15 - 02/26/15 32 +/- 5 35 +/- 5 30 +/- 5 37 +/- 5 36 +/- 5 29 +/- 5 31 +/- 5 28 +/- 5 02/26/15 - 03/05/15 17 +/- 4 15 +/- 4 14 +/- 4 17 +/- 4 12 +/- 4 17 +/- 4 18 +/- 4 21 +/- 5 03/05/15 - 03/12/15 15 +/- 4 14 +/- 4 13 +/- 4 14 +/- 4 15 +/- 4 14 +/- 4 15 +/- 4 15 +/- 4 03/12/15 - 03/19/15 13 +/- 4 16 +/- 4 17 +/- 4 12 +/- 4 15 +/- 4 12 +/- 4 13 +/- 4 14 +/- 4 03/19/15 - 03/26/15 14 +/- 4 18 +/- 4 14 +/- 4 22 +/- 5 17 +/- 4 18 +/- 4 18 +/- 4 17 +/- 4 03/26/15 - 04/01/15 17 +/- 5 17 +/- 5 14 +/- 4 13 +/- 4 18 +/- 5 13 +/- 4 16 +/- 4 14 +/- 4 04/01/15 - 04/09/15 11 +/- 3 8 +/- 3 14 +/- 4 13 +/- 3 14 +/- 3 13 +/- 3 9 +/- 3 12 +/- 3 04/09/15 - 04/16/15 16 +/- 4 15 +/- 4 18 +/- 4 14 +/- 4 14 +/- 4 17 +/- 4 17 +/- 4 17 +/- 4 04/16/15 - 04/23/15 12 +/- 4 9 +/- 4 15 +/- 4 13 +/- 4 13 +/- 4 17 +/- 4 12 +/- 4 11 +/- 4 04/23/15 - 04/30/15 14 +/- 4 9 +/- 3 12 +/- 4 11 +/- 4 12 +/- 4 12 +/- 4 10 +/- 3 14 +/- 4 04/30/15 - 05/07/15 9 +/- 4 15 +/- 4 15 +/- 4 10 +/- 4 12 +/- 4 13 +/- 4 13 +/- 4 11 +/- 4 05/07/15 - 05/14/15 6 +/- 3 5 +/- 3 5 +/- 3 5 +/- 3 5 +/- 3 5 +/- 3 6 +/- 3 6 +/- 3 05/14/15 - 05/21/15 11 +/- 4 9 +/- 3 13 +/- 4 14 +/- 4 10 +/- 3 14 +/- 4 9 +/- 3 10 +/- 4 05/21/15 - 05/28/15 17 +/- 5 14 +/- 4 13 +/- 4 12 +/- 4 14 +/- 4 12 +/- 4 12 +/- 4 13 +/- 4 05/28/15 - 06/04/15 9 +/- 4 13 +/- 4 13 +/- 4 11 +/- 4 11 +/- 4 12 +/- 4 11 +/- 4 10 +/- 4 06/04/15 - 06/11/15 14 +/- 4 16 +/- 4 14 +/- 4 14 +/- 4 18 +/- 4 15 +/- 4 15 +/- 4 13 +/- 4 06/11/15 - 06/18/15 6 +/- 3 10 +/- 4 9 +/- 4 < 3 9 +/- 4 11 +/- 4 9 +/- 4 11 +/- 4 06/18/15 - 06/25/15 16 +/- 4 12 +/- 4 12 +/- 5 12 +/- 5 15 +/- 4 12 +/- 4 11 +/- 4 15 +/- 5 06/25/15 - 07/02/15 9 +/- 4 10 +/- 4 10 +/- 4 10 +/- 4 10 +/- 4 8 +/- 4 10 +/- 4 12 +/- 4 07/02/15 - 07/09/15 10 +/- 4 8 +/- 4 11 +/- 4 12 +/- 4 14 +/- 4 11 +/- 4 12 +/- 4 7 +/- 3 07/09/15 - 07/16/15 8 +/- 4 11 +/- 4 13 +/- 4 11 +/- 4 9 +/- 4 12 +/- 4 9 +/- 4 8 +/- 4 07/16/15 - 07/23/15 15 +/- 4 14 +/- 4 15 +/- 4 16 +/- 4 14 +/- 4 18 +/- 4 16 +/- 4 12 +/- 4 07/23/15 - 07/30/15 14 +/- 5 17 +/- 5 21 +/- 5 14 +/- 5 17 +/- 5 15 +/- 5 13 +/- 4 (1) 07/30/15 - 08/06/15 21 +/- 5 14 +/- 4 21 +/- 5 23 +/- 5 21 +/- 5 23 +/- 5 22 +/- 5 (1) 08/06/15 - 08/13/15 19 +/- 4 18 +/- 4 16 +/- 4 20 +/- 4 20 +/- 4 21 +/- 4 21 +/- 4 18 +/- 4 08/13/15 - 08/20/15 20 +/- 5 17 +/- 5 16 +/- 4 19 +/- 5 21 +/- 5 18 +/- 5 19 +/- 5 15 +/- 4 08/20/15 - 08/27/15 14 +/- 4 18 +/- 4 17 +/- 4 18 +/- 4 17 +/- 4 20 +/- 4 19 +/- 4 17 +/- 4 08/27/15 - 09/03/15 38 +/- 6 36 +/- 5 36 +/- 5 36 +/- 5 33 +/- 5 34 +/- 5 43 +/- 6 32 +/- 5 09/03/15 - 09/10/15 33 +/- 5 30 +/- 5 30 +/- 5 30 +/- 5 32 +/- 5 24 +/- 5 30 +/- 5 31 +/- 6 09/10/15 - 09/17/15 17 +/- 4 18 +/- 4 17 +/- 4 20 +/- 4 16 +/- 4 24 +/- 4 18 +/- 4 20 +/- 4 09/17/15 - 09/24/15 20 +/- 4 16 +/- 4 17 +/- 4 16 +/- 4 14 +/- 4 15 +/- 4 15 +/- 4 20 +/- 4 09/24/15 - 10/01/15 20 +/- 4 22 +/- 5 21 +/- 4 19 +/- 4 16 +/- 4 19 +/- 4 21 +/- 5 20 +/- 4 10/01/15 - 10/08/15 15 +/- 4 13 +/- 4 12 +/- 4 12 +/- 4 12 +/- 4 15 +/- 4 15 +/- 4 9 +/- 3 10/08/15 - 10/15/15 20 +/- 5 25 +/- 5 21 +/- 5 19 +/- 4 20 +/- 5 19 +/- 5 23 +/- 5 18 +/- 4 10/15/15 - 10/22/15 29 +/- 5 23 +/- 5 25 +/- 5 27 +/- 5 23 +/- 5 27 +/- 5 27 +/- 5 26 +/- 5 10/22/15 - 10/29/15 14 +/- 4 14 +/- 4 13 +/- 4 11 +/- 4 16 +/- 4 18 +/- 4 14 +/- 4 12 +/- 4 10/29/15 - 11/05/15 19 +/- 4 16 +/- 4 18 +/- 4 14 +/- 4 17 +/- 4 19 +/- 4 20 +/- 4 19 +/- 4 11/05/15 - 11/12/15 21 +/- 5 17 +/- 4 21 +/- 5 24 +/- 5 18 +/- 5 24 +/- 5 20 +/- 5 20 +/- 5 11/12/15 - 11/19/15 17 +/- 4 (1) 19 +/- 4 19 +/- 4 18 +/- 4 25 +/- 5 19 +/- 4 18 +/- 4 11/19/15 - 11/25/15 15 +/- 5 19 +/- 13 14 +/- 5 13 +/- 5 13 +/- 5 14 +/- 5 15 +/- 5 18 +/- 5 11/25/15 - 12/03/15 19 +/- 4 16 +/- 4 20 +/- 4 14 +/- 3 17 +/- 4 15 +/- 3 18 +/- 4 14 +/- 3 12/03/15 - 12/10/15 29 +/- 5 25 +/- 5 26 +/- 5 30 +/- 5 33 +/- 6 34 +/- 6 26 +/- 5 27 +/- 5 12/10/15 - 12/17/15 13 +/- 4 16 +/- 4 15 +/- 4 18 +/- 4 14 +/- 4 13 +/- 4 15 +/- 4 15 +/- 4 12/17/15 - 12/24/15 26 +/- 5 21 +/- 4 30 +/- 5 22 +/- 5 24 +/- 5 28 +/- 5 26 +/- 5 21 +/- 4 12/24/15 - 12/31/15 16 +/- 4 15 +/- 4 14 +/- 4 14 +/- 4 14 +/- 4 20 +/- 4 15 +/- 4 14 +/- 4 MEAN 17 +/- 14 17 +/- 13 17 +/- 12 17 +/- 13 17 +/- 13 18 +/- 12 17 +/- 14 17 +/- 12 THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-12

Table C-VI.2 MONTHLY AND YEARLY VALUES OF GROSS BETA CONCENTRATIONS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA GROUP I - NEAR FIELD LOCATIONS GROUP II - FAR FIELD LOCATIONS GROUP III - CONTROL LOCATIONS COLLECTION MIN MAX MEAN +/- COLLECTION MIN MAX MEAN +/- COLLECTION MIN MAX MEAN +/-

PERIOD 2SD PERIOD 2SD PERIOD 2SD 12/31/14 - 01/29/15 9 31 20 +/- 12 12/31/14 - 01/29/15 12 30 20 +/- 12 12/31/14 - 01/29/15 16 22 19 +/- 6 01/29/15 - 02/26/15 12 37 23 +/- 15 01/29/15 - 02/26/15 13 36 22 +/- 13 01/29/15 - 02/26/15 16 28 23 +/- 10 02/26/15 - 04/01/15 12 22 15 +/- 5 02/26/15 - 04/01/15 12 18 15 +/- 4 02/26/15 - 04/01/15 14 21 16 +/- 6 04/01/15 - 04/30/15 8 18 13 +/- 5 04/01/15 - 04/30/15 9 17 13 +/- 5 04/01/15 - 04/30/15 11 17 13 +/- 6 04/30/15 - 05/28/15 5 17 11 +/- 8 04/30/15 - 05/28/15 5 14 10 +/- 7 04/30/15 - 05/28/15 6 13 10 +/- 5 05/28/15 - 07/02/15 6 16 12 +/- 5 05/28/15 - 07/02/15 8 18 12 +/- 6 05/28/15 - 07/02/15 10 15 12 +/- 4 07/02/15 - 07/30/15 8 21 13 +/- 7 07/02/15 - 07/30/15 9 18 13 +/- 6 07/02/15 - 07/23/15 7 12 9 +/- 6 07/30/15 - 09/03/15 14 38 22 +/- 16 07/30/15 - 09/03/15 17 43 23 +/- 15 08/06/15 - 09/03/15 15 32 20 +/- 15 09/03/15 - 10/01/15 16 33 22 +/- 11 09/03/15 - 10/01/15 14 32 20 +/- 12 09/03/15 - 10/01/15 20 31 23 +/- 11 C-13 10/01/15 - 10/29/15 11 29 18 +/- 12 10/01/15 - 10/29/15 12 27 19 +/- 10 10/01/15 - 10/29/15 9 26 16 +/- 14 10/29/15 - 12/03/15 13 24 18 +/- 6 10/29/15 - 12/03/15 13 25 18 +/- 6 10/29/15 - 12/03/15 14 20 18 +/- 5 12/03/15 - 12/31/15 13 30 21 +/- 13 12/03/15 - 12/31/15 13 34 22 +/- 15 12/03/15 - 12/31/15 14 27 19 +/- 12 12/31/14 - 12/31/15 5 38 17 +/- 13 12/31/14 - 12/31/15 5 43 17 +/- 13 12/31/14 - 12/31/15 6 32 17 +/- 12 THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES

Table C-VI.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-02 12/31/14 - 04/01/15 < 4 < 4 < 12 < 3 < 11 < 5 < 11 < 4 < 3 < 147 < 63 04/01/15 - 07/02/15 < 2 < 2 < 6 < 2 < 5 < 3 < 4 < 2 < 3 < 34 < 16 07/02/15 - 10/01/15 < 2 < 3 < 7 < 2 < 5 < 3 < 3 < 2 < 2 < 53 < 19 10/01/15 - 12/31/15 < 2 < 2 < 4 < 3 < 3 < 3 < 5 < 3 < 2 < 27 < 8 MEAN - - - - - - - - - - -

BD-03 12/31/14 - 04/01/15 < 4 < 6 < 21 < 5 < 13 < 8 < 12 < 5 < 5 < 217 < 84 04/01/15 - 07/02/15 < 3 < 6 < 7 < 5 < 7 < 4 < 7 < 4 < 3 < 54 < 18 07/02/15 - 10/01/15 < 2 < 4 < 10 < 3 < 8 < 3 < 4 < 3 < 3 < 72 < 24 10/01/15 - 12/31/15 < 2 < 2 < 5 < 2 < 5 < 2 < 4 < 2 < 2 < 23 < 11 MEAN - - - - - - - - - - -

C-14 BD-04 12/31/14 - 04/01/15 < 4 < 4 < 10 < 3 < 7 < 6 < 4 < 4 < 3 < 131 < 88 04/01/15 - 07/02/15 < 4 < 3 < 10 < 2 < 5 < 3 < 4 < 3 < 3 < 44 < 9 07/02/15 - 10/01/15 < 2 < 3 < 10 < 2 < 5 < 4 < 5 < 2 < 3 < 54 < 17 10/01/15 - 12/31/15 < 3 < 3 < 6 < 3 < 6 < 3 < 6 < 3 < 3 < 36 < 6 MEAN - - - - - - - - - - -

BD-05 12/31/14 - 04/01/15 < 3 < 5 < 16 < 4 < 8 < 4 < 6 < 4 < 3 < 181 < 68 04/01/15 - 07/02/15 < 2 < 4 < 5 < 3 < 6 < 2 < 7 < 2 < 2 < 48 < 12 07/02/15 - 10/01/15 < 2 < 3 < 8 < 2 < 5 < 3 < 5 < 3 < 2 < 53 < 17 10/01/15 - 12/31/15 < 3 < 3 < 8 < 2 < 7 < 3 < 6 < 3 < 2 < 33 < 13 MEAN - - - - - - - - - - -

BD-06 12/31/14 - 04/01/15 < 3 < 4 < 10 < 2 < 8 < 3 < 5 < 3 < 2 < 106 < 17 04/01/15 - 07/02/15 < 3 < 3 < 7 < 3 < 7 < 5 < 6 < 2 < 2 < 43 < 21 07/02/15 - 10/01/15 < 4 < 6 < 12 < 4 < 11 < 5 < 8 < 4 < 3 < 99 < 34 10/01/15 - 12/31/15 < 4 < 4 < 10 < 5 < 13 < 4 < 8 < 4 < 4 < 40 < 19 MEAN - - - - - - - - - - -

Table C-VI.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-19 12/31/14 - 04/01/15 < 4 < 10 < 19 < 6 < 9 < 6 < 12 < 5 < 4 < 197 < 97 04/01/15 - 07/02/15 < 3 < 3 < 6 < 3 < 6 < 4 < 6 < 3 < 2 < 36 < 12 07/02/15 - 10/01/15 < 3 < 4 < 8 < 3 < 6 < 3 < 7 < 3 < 4 < 82 < 35 10/01/15 - 12/31/15 < 3 < 3 < 9 < 4 < 7 < 4 < 7 < 3 < 3 < 46 < 14 MEAN - - - - - - - - - - -

BD-20 12/31/14 - 04/01/15 < 3 < 4 < 12 < 4 < 8 < 4 < 8 < 3 < 3 < 165 < 63 04/01/15 - 07/02/15 < 3 < 4 < 5 < 2 < 6 < 3 < 5 < 3 < 3 < 37 < 12 07/02/15 - 10/01/15 < 3 < 6 < 10 < 4 < 9 < 5 < 10 < 4 < 3 < 85 < 33 10/01/15 - 12/31/15 < 2 < 3 < 7 < 3 < 7 < 3 < 5 < 3 < 2 < 34 < 11 MEAN - - - - - - - - - - -

C-15 BD-21 12/31/14 - 04/01/15 < 5 < 5 < 20 < 4 < 11 < 9 < 17 < 5 < 4 < 354 < 112 04/01/15 - 07/02/15 < 3 < 3 < 5 < 2 < 6 < 3 < 6 < 2 < 3 < 46 < 9 07/02/15 - 10/01/15 < 2 < 3 < 5 < 1 < 5 < 3 < 5 < 3 < 2 < 48 < 19 10/01/15 - 12/31/15 < 3 < 4 < 8 < 3 < 7 < 4 < 6 < 3 < 3 < 49 < 14 MEAN - - - - - - - - - - -

Table C-VII.1 CONCENTRATIONS OF I-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA GROUP III -

CONTROL COLLECTION GROUP I - NEAR FIELD GROUP II - FAR FIELD LOCATION PERIOD BD-06 BD-19 BD-20 BD-21 BD-02 BD-04 BD-05 BD-03 12/31/14 - 01/08/15 < 32 < 32 < 32 < 32 < 32 < 32 < 32 < 32 01/08/15 - 01/15/15 < 20 < 58 < 58 < 58 < 52 < 52 < 52 < 52 01/15/15 - 01/22/15 < 63 < 63 < 63 < 63 < 58 < 58 < 58 < 58 01/22/15 - 01/29/15 < 42 < 23 < 42 < 42 < 53 < 53 < 42 < 53 01/29/15 - 02/05/15 < 51 < 51 < 22 < 7 < 56 < 56 < 51 < 56 02/05/15 - 02/12/15 < 37 < 37 < 37 (1) < 40 < 40 < 37 < 40 02/12/15 - 02/19/15 < 43 < 42 < 42 < 42 < 50 < 50 < 50 < 50 02/19/15 - 02/26/15 < 45 < 42 < 42 < 42 < 17 < 45 < 45 < 45 02/26/15 - 03/05/15 < 41 < 41 < 41 < 41 < 38 < 37 < 37 < 37 03/05/15 - 03/12/15 < 36 < 37 < 37 < 37 < 36 < 36 < 36 < 14 03/12/15 - 03/19/15 < 66 < 66 < 68 < 66 < 69 < 69 < 69 < 70 03/19/15 - 03/26/15 < 38 < 37 < 37 < 37 < 37 < 21 < 37 < 37 03/26/15 - 04/01/15 < 47 < 58 < 56 < 56 < 20 < 47 < 46 < 48 04/01/15 - 04/09/15 < 32 < 33 < 33 < 33 < 32 < 32 < 12 < 32 04/09/15 - 04/16/15 < 53 < 53 < 53 < 53 < 69 < 69 < 69 < 69 04/16/15 - 04/23/15 < 26 < 62 < 62 < 62 < 62 < 62 < 62 < 62 04/23/15 - 04/30/15 < 59 < 59 < 59 < 59 < 63 < 67 < 65 < 63 04/30/15 - 05/07/15 < 32 < 17 < 32 < 31 < 32 < 32 < 32 < 32 05/07/15 - 05/14/15 < 26 < 26 < 26 < 26 < 23 < 23 < 23 < 23 05/14/15 - 05/21/15 < 46 < 46 < 19 < 46 < 49 < 49 < 49 < 49 05/21/15 - 05/28/15 < 27 < 27 < 27 < 27 < 22 < 22 < 22 < 22 05/28/15 - 06/04/15 < 67 < 67 < 67 < 28 < 40 < 40 < 40 < 40 06/04/15 - 06/11/15 < 45 < 45 < 45 < 45 < 35 < 36 < 35 < 35 06/11/15 - 06/18/15 < 37 < 37 < 37 < 37 < 59 < 60 < 60 < 60 06/18/15 - 06/25/15 < 53 < 54 < 65 < 67 < 54 < 54 < 50 (1) 06/25/15 - 07/02/15 < 49 < 49 < 49 < 49 < 52 < 52 < 52 < 52 07/02/15 - 07/09/15 < 41 < 41 < 17 < 41 < 44 < 44 < 44 < 44 07/09/15 - 07/16/15 < 56 < 28 < 56 < 56 < 15 < 15 < 15 < 15 07/16/15 - 07/23/15 < 41 < 40 < 41 < 41 < 46 < 46 < 46 < 52 07/23/15 - 07/30/15 < 40 < 38 < 40 < 40 < 39 < 39 < 39 < 254 07/30/15 - 08/06/15 < 62 < 67 < 62 < 34 < 68 < 69 < 62 (1) 08/06/15 - 08/13/15 < 56 < 55 < 57 < 57 < 50 < 58 < 48 < 22 08/13/15 - 08/20/15 < 19 < 45 < 45 < 45 < 29 < 29 < 28 < 28 08/20/15 - 08/27/15 < 56 < 56 < 56 < 56 < 58 < 64 < 62 < 60 08/27/15 - 09/03/15 < 52 < 52 < 52 < 52 < 54 < 56 < 56 < 52 09/03/15 - 09/10/15 < 45 < 65 < 65 < 65 < 19 < 46 < 45 < 49 09/10/15 - 09/17/15 < 45 < 45 < 45 < 45 < 57 < 57 < 55 < 54 09/17/15 - 09/24/15 < 54 < 54 < 54 < 54 < 54 < 54 < 53 < 53 09/24/15 - 10/01/15 < 53 < 54 < 54 < 22 < 58 < 58 < 60 < 58 10/01/15 - 10/08/15 < 45 < 45 < 45 < 45 < 49 < 49 < 50 < 18 10/08/15 - 10/15/15 < 60 < 60 < 60 < 60 < 35 < 36 < 36 < 34 10/15/15 - 10/22/15 < 58 < 58 < 59 < 59 < 64 < 66 < 64 < 26 10/22/15 - 10/29/15 < 53 < 53 < 53 < 53 < 42 < 43 < 41 < 40 10/29/15 - 11/05/15 < 34 < 46 < 46 < 46 < 34 < 37 < 35 < 12 11/05/15 - 11/12/15 < 43 < 42 < 43 < 42 < 42 < 43 < 44 < 41 11/12/15 - 11/19/15 < 56 (1) < 58 < 58 < 69 < 69 < 69 < 65 11/19/15 - 11/25/15 < 38 (1) < 38 < 38 < 40 < 40 < 39 < 37 11/25/15 - 12/03/15 < 57 < 57 < 58 < 58 < 44 < 43 < 43 < 41 12/03/15 - 12/10/15 < 68 < 68 < 68 < 69 < 39 < 39 < 39 < 36 12/10/15 - 12/17/15 < 55 < 55 < 67 < 53 < 57 < 57 < 58 < 54 12/17/15 - 12/24/15 < 66 < 67 < 67 < 67 < 68 < 68 < 68 < 64 12/24/15 - 12/31/15 < 66 < 68 < 69 < 69 < 66 < 66 < 64 < 62 MEAN - - - - - - - -

(1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-16

Table C-VIII.1 CONCENTRATIONS OF I-131 IN MILK SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA INDICATOR FARM CONTROL FARM COLLECTION BD-17 BD-18 PERIOD 01/15/15 < 0.3 (1) 02/06/15 < 0.7 < 0.5 03/05/15 < 0.5 < 0.7 04/02/15 < 0.5 < 0.4 05/07/15 < 0.6 < 0.6 05/21/15 < 0.6 < 0.7 06/04/15 < 0.9 < 0.9 06/18/15 < 0.8 < 0.7 07/02/15 < 0.7 < 0.8 07/16/15 < 0.3 < 0.3 07/30/15 < 0.5 < 0.6 08/13/15 < 0.6 < 0.8 08/27/15 < 0.7 < 0.6 09/10/15 < 0.6 < 0.6 09/24/15 < 0.3 < 0.4 10/08/15 < 0.7 < 0.7 10/22/15 < 0.5 < 0.3 11/05/15 < 0.6 < 0.5 12/03/15 < 0.5 (1)

MEAN - -

(1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-17

Table C-VIII.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-17 01/15/15 < 8 < 8 < 20 < 8 < 19 < 8 < 15 < 8 < 8 < 39 < 10 02/06/15 < 7 < 7 < 17 < 7 < 17 < 7 < 13 < 6 < 7 < 33 < 9 03/05/15 < 3 < 4 < 9 < 4 < 6 < 4 < 6 < 3 < 3 < 22 < 8 04/02/15 < 5 < 5 < 12 < 5 < 12 < 5 < 8 < 4 < 5 < 35 < 9 05/07/15 < 2 < 2 < 6 < 2 < 5 < 2 < 4 < 2 < 2 < 17 < 5 05/21/15 < 3 < 4 < 9 < 4 < 8 < 4 < 6 < 3 < 4 < 28 < 9 06/04/15 < 13 < 12 < 24 < 15 < 31 < 12 < 20 < 11 < 11 < 54 < 12 06/18/15 < 5 < 6 < 11 < 7 < 11 < 6 < 10 < 6 < 5 < 23 < 7 07/02/15 < 7 < 8 < 16 < 7 < 14 < 8 < 9 < 5 < 6 < 36 < 15 07/16/15 < 6 < 6 < 15 < 7 < 18 < 6 < 11 < 5 < 6 < 39 < 7 07/30/15 < 5 < 5 < 14 < 7 < 14 < 6 < 9 < 5 < 6 < 35 < 8 08/13/15 < 8 < 9 < 18 < 9 < 18 < 9 < 15 < 9 < 8 < 50 < 11 08/27/15 < 11 < 11 < 24 < 12 < 31 < 12 < 22 < 10 < 13 < 52 < 9 09/10/15 < 11 < 13 < 28 < 9 < 37 < 13 < 20 < 15 < 14 < 58 < 7 09/24/15 < 8 < 8 < 20 < 9 < 19 < 8 < 16 < 6 < 9 < 33 < 11 C-18 10/08/15 < 6 < 7 < 14 < 6 < 14 < 7 < 11 < 6 < 7 < 32 < 8 10/22/15 < 6 < 6 < 15 < 6 < 12 < 5 < 11 < 6 < 5 < 25 < 7 11/05/15 < 8 < 7 < 23 < 11 < 24 < 9 < 16 < 10 < 11 < 39 < 11 12/03/15 < 8 < 7 < 22 < 10 < 13 < 9 < 13 < 6 < 8 < 36 < 11 MEAN - - - - - - - - - - -

Table C-VIII.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-18 01/08/15 (1) 02/06/15 < 7 < 6 < 16 < 6 < 16 < 7 < 11 < 7 < 7 < 33 < 10 03/05/15 < 6 < 5 < 17 < 5 < 14 < 7 < 11 < 6 < 6 < 46 < 10 04/02/15 < 8 < 9 < 18 < 7 < 17 < 10 < 16 < 8 < 9 < 59 < 9 05/06/15 < 3 < 3 < 8 < 3 < 7 < 3 < 6 < 3 < 3 < 28 < 9 05/21/15 < 8 < 8 < 14 < 9 < 18 < 10 < 16 < 7 < 8 < 52 < 12 06/04/15 < 9 < 7 < 24 < 11 < 22 < 10 < 14 < 7 < 8 < 42 < 14 06/18/15 < 6 < 9 < 15 < 5 < 16 < 7 < 11 < 6 < 8 < 37 < 13 07/01/15 < 6 < 6 < 15 < 8 < 12 < 6 < 10 < 6 < 6 < 36 < 10 07/16/15 < 9 < 7 < 15 < 8 < 14 < 8 < 14 < 7 < 7 < 49 < 11 07/30/15 < 6 < 6 < 15 < 6 < 14 < 6 < 13 < 6 < 6 < 38 < 15 08/13/15 < 9 < 9 < 18 < 8 < 20 < 9 < 14 < 9 < 9 < 48 < 13 08/27/15 < 8 < 7 < 15 < 12 < 26 < 10 < 17 < 6 < 9 < 39 < 11 09/10/15 < 6 < 6 < 15 < 8 < 15 < 6 < 12 < 5 < 7 < 25 < 9 C-19 09/24/15 < 8 < 6 < 20 < 6 < 20 < 8 < 11 < 8 < 8 < 36 < 12 10/08/15 < 6 < 6 < 15 < 6 < 14 < 7 < 12 < 6 < 7 < 31 < 6 10/22/15 < 7 < 7 < 17 < 8 < 15 < 7 < 13 < 7 < 7 < 32 < 5 11/05/15 < 6 < 7 < 18 < 7 < 16 < 7 < 11 < 5 < 7 < 29 < 7 12/03/15 (1)

MEAN - - - - - - - - - - -

(1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION

Table C-IX.1 CONCENTRATIONS OF GAMMA EMITTERS IN VEGETATION SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-CONTROL Sweet potatoes 09/24/15 < 23 < 21 < 60 < 21 < 63 < 24 < 39 < 19 < 22 < 121 < 44 Swiss chard 09/24/15 < 27 < 27 < 76 < 28 < 63 < 26 < 54 < 21 < 28 < 136 < 28 MEAN - - - - - - - - - - -

BD-QUAD 1 09/24/15 (1) 09/24/15 (1)

MEAN - - - - - - - - - - -

BD-QUAD 2 Beets 09/24/15 < 19 < 19 < 44 < 22 < 42 < 20 < 30 < 17 < 18 < 108 < 35 C-20 Cauliflower 09/24/15 < 23 < 23 < 56 < 24 < 62 < 26 < 46 < 22 < 22 < 135 < 36 MEAN - - - - - - - - - - -

BD-QUAD 3 09/24/15 (1) 09/24/15 (1)

MEAN - - - - - - - - - - -

BD-QUAD 4 09/24/15 (1) 09/24/15 (1)

MEAN - - - - - - - - - - -

(1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION

Table C-X.1 QUARTERLY OSLD RESULTS FOR BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF MREM/QUARTER +/- 2 STANDARD DEVIATIONS STATION MEAN JAN - MAR APR - JUN JUL - SEP OCT - DEC CODE +/- 2 S.D.

BD-02-1 20.7 +/- 3.1 19.2 19.7 21.1 22.7 BD-02-2 21.2 +/- 2.3 19.5 21.3 21.7 22.1 BD-03-1 20.1 +/- 2.1 19.1 20.0 19.8 21.6 BD-03-2 21.2 +/- 3.7 19.5 20.8 20.5 23.8 BD-04-1 19.6 +/- 0.7 19.1 19.8 19.8 19.8 BD-04-2 19.7 +/- 3.7 18.0 22.3 19.5 19.0 BD-05-1 21.0 +/- 3.6 19.1 23.0 19.9 22.0 BD-05-2 20.6 +/- 3.4 18.6 21.2 19.9 22.6 BD-06-1 19.9 +/- 2.6 18.4 21.2 19.3 20.8 BD-06-2 19.6 +/- 2.3 18.4 20.5 18.8 20.7 BD-19-1 21.3 +/- 2.4 20.0 20.8 21.6 22.8 BD-19-2 21.3 +/- 3.3 19.4 22.1 20.5 23.1 BD-20-1 21.4 +/- 3.9 18.7 22.9 21.0 22.8 BD-20-2 21.6 +/- 5.2 18.8 24.6 20.1 22.7 BD-21-1 20.1 +/- 3.0 17.9 20.9 20.6 21.0 BD-21-2 20.5 +/- 3.5 18.2 21.8 19.9 21.9 BD-101-3 21.4 +/- 5.5 18.2 24.4 20.3 22.8 BD-101-4 20.4 +/- 2.3 19.2 21.9 20.0 20.5 BD-102-1 19.4 +/- 3.0 18.2 20.9 18.0 20.4 BD-102-2 21.1 +/- 2.8 19.3 22.5 20.8 21.8 BD-103-1 20.3 +/- 2.8 19.2 19.6 20.0 22.3 BD-103-2 20.8 +/- 2.1 19.5 20.6 22.0 20.9 BD-104-1 19.7 +/- 1.3 18.9 20.5 19.7 19.8 BD-104-2 20.0 +/- 2.4 18.5 20.6 19.5 21.2 BD-104-3 24.4 +/- 2.3 23.0 24.1 24.7 25.7 BD-104-4 24.9 +/- 3.3 22.5 26.2 25.3 25.6 BD-105-1 19.7 +/- 4.7 18.7 17.9 19.1 23.2 BD-105-2 20.1 +/- 2.6 18.5 20.2 19.9 21.7 BD-105-3 23.2 +/- 2.3 22.3 22.9 22.7 24.9 BD-105-4 26.3 +/- 8.3 28.1 31.3 22.8 23.0 BD-106-1 18.9 +/- 5.1 18.1 15.9 19.6 22.0 BD-106-2 19.1 +/- 2.9 17.9 20.7 17.9 20.0 BD-107-1 20.3 +/- 3.2 18.3 21.6 19.6 21.5 BD-107-2 19.1 +/- 1.8 18.2 19.4 18.6 20.2 BD-108-1 19.4 +/- 2.4 18.1 20.5 18.6 20.3 BD-108-2 20.3 +/- 2.1 18.8 20.1 20.9 21.2 BD-109-1 22.6 +/- 3.5 20.4 22.7 22.7 24.7 BD-109-2 23.6 +/- 2.8 22.7 24.0 22.2 25.3 BD-110-1 20.0 +/- 2.5 18.4 19.7 20.5 21.3 BD-110-2 19.9 +/- 4.1 17.4 22.4 19.7 20.1 BD-110-3 24.1 +/- 3.6 26.1 25.0 22.2 22.9 BD-110-4 25.9 +/- 3.2 24.7 28.1 24.8 25.8 BD-112-1 19.3 +/- 0.8 19.0 19.8 19.3 19.0 BD-112-2 17.1 +/- 5.1 17.9 19.9 16.8 13.8 C-21

Table C-X.1 QUARTERLY OSLD RESULTS FOR BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF MREM/QUARTER +/- 2 STANDARD DEVIATIONS STATION MEAN JAN - MAR APR - JUN JUL - SEP OCT - DEC CODE +/- 2 S.D.

BD-114-1 19.9 +/- 3.7 19.3 21.1 17.5 21.5 BD-114-2 19.7 +/- 2.0 18.2 19.8 20.5 20.2 BD-115-1 20.5 +/- 2.7 19.4 22.0 19.2 21.2 BD-115-2 20.6 +/- 3.1 18.8 22.0 19.8 21.8 BD-116-1 21.2 +/- 3.4 19.6 23.6 20.5 21.0 BD-116-2 20.7 +/- 2.3 19.1 21.4 20.6 21.6 BD-201-1 24.7 +/- 6.7 21.0 25.5 (1) 27.6 BD-201-2 22.4 +/- 4.2 20.0 23.3 (1) 23.9 BD-202-1 20.5 +/- 2.7 18.7 21.5 20.3 21.5 BD-202-2 20.4 +/- 3.5 17.9 21.9 21.3 20.4 BD-203-1 20.6 +/- 0.6 20.2 20.4 20.7 20.9 BD-203-2 20.1 +/- 3.2 17.7 21.0 20.6 21.0 BD-204-1 19.4 +/- 2.5 18.0 20.8 18.9 20.0 BD-204-2 19.6 +/- 1.9 18.3 19.4 19.9 20.6 BD-205-1 19.5 +/- 3.7 17.3 21.8 19.6 19.3 BD-205-2 18.7 +/- 3.8 17.1 20.3 17.0 20.3 BD-206-1 19.6 +/- 5.0 16.7 20.8 18.5 22.4 BD-206-2 20.2 +/- 2.2 18.6 20.7 20.4 21.1 BD-207-1 19.6 +/- 2.1 18.2 20.0 19.4 20.7 BD-207-2 18.3 +/- 1.7 17.1 19.1 18.7 18.3 BD-208-1 20.2 +/- 1.9 18.8 20.3 20.5 21.0 BD-208-2 20.3 +/- 3.6 18.2 21.3 19.4 22.2 BD-209-1 23.9 +/- 4.3 20.7 24.4 25.4 24.9 BD-209-2 24.8 +/- 3.7 22.2 26.3 24.9 25.9 BD-210-1 22.9 +/- 2.6 21.5 23.4 22.3 24.5 BD-210-2 20.2 +/- 2.5 18.7 (1) 20.8 21.0 BD-211-1 24.6 +/- 6.2 20.5 26.6 23.8 27.3 BD-211-2 24.2 +/- 3.7 22.1 23.3 25.3 26.2 BD-212-3 20.1 +/- 1.7 18.9 20.9 19.9 20.5 BD-212-4 25.2 +/- 5.1 21.9 25.9 25.1 28.0 BD-213-3 19.3 +/- 2.8 18.3 20.0 17.9 20.8 BD-213-4 19.5 +/- 3.2 18.9 19.0 18.1 21.8 BD-214-1 19.5 +/- 3.3 18.0 21.6 18.4 19.9 BD-214-2 22.3 +/- 2.5 20.4 23.1 23.0 22.6 BD-215-1 20.3 +/- 3.4 18.1 22.1 20.1 20.9 BD-215-2 19.3 +/- 3.1 18.7 19.9 17.4 21.0 BD-216-1 21.9 +/- 4.3 19.3 22.9 21.2 24.3 BD-216-2 23.2 +/- 4.2 20.3 23.6 23.8 25.2 BD-111A-1 20.4 +/- 2.9 19.5 22.5 19.9 19.6 BD-111A-2 19.6 +/- 2.8 18.4 18.6 20.0 21.4 BD-113A-1 20.7 +/- 3.7 19.0 23.3 19.9 20.7 BD-113A-2 20.7 +/- 3.3 19.8 21.5 18.9 22.5 (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-22

TABLE C-X.2 MEAN QUARTLY OSLD RESULTS FOR THE INNER RING, OUTER RING, OTHER CONTROL AND ISFSI LOCATIONS FOR BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF MREM/QUARTER +/- 2 STANDARD DEVIATION OF THE STATION DATA COLLECTION INNER RING OUTER RING OTHER CONTROL ISFSI PERIOD +/- 2 S.D.

JAN-MAR 18.9 +/- 1.9 19.1 +/- 3.1 18.8 +/- 1.2 19.3 +/- 0.6 24.5 +/- 4.6 APR-JUN 21.0 +/- 3.6 22.0 +/- 4.2 21.6 +/- 2.7 20.4 +/- 1.1 26.3 +/- 6.1 JUL-SEP 19.8 +/- 2.5 20.8 +/- 4.9 20.3 +/- 1.7 20.2 +/- 1.0 23.8 +/- 2.7 OCT-DEC 21.1 +/- 3.8 22.4 +/- 5.2 21.7 +/- 2.5 22.7 +/- 3.1 24.7 +/- 2.7 TABLE C-X.2 MEAN QUARTLY OSLD RESULTS FOR THE INNER RING, OUTER RING, OTHER, CONTROL AND ISFSI LOCATIONS FOR BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF MREM/QUARTER +/- 2 STANDARD DEVIATION LOCATION SAMPLES PERIOD PERIOD PERIOD MEAN ANALYZED MINIMUM MAXIMUM +/- 2 S.D.

INNER RING 128 13.8 25.3 20.2 +/- 3.5 OUTER RING 125 16.7 28.0 21.1 +/- 5.0 OTHER 56 17.9 24.6 20.6 +/- 3.1 CONTROL 8 19.1 23.8 20.6 +/- 3.0 ISFSI 24 22.2 31.3 24.8 +/- 4.4 INNER RING STATIONS - BD-101-3, BD-101-4, BD-102-1, BD-102-2, BD-103-1, BD-103-2, BD-104-1, BD-104-2, BD-105-1, BD-105-2, BD-106-1, BD-106-2, BD-107-1, BD-107-2, BD-108-1, BD-108-2, BD-109-1, BD-109-2, BD-110-1, BD-110-2, BD-111A-1, BD-111A-2, BD-112-1, BD-112-2, BD-113A-1, BD-113A-2, BD-114-1, BD-114-2, BD-115-1, BD-115-2, BD-116-1, BD-116-2 OUTER RING STATIONS - BD-201-1, BD-201-2, BD-202-1, BD-202-2, BD-203-1, BD-203-2, BD-204-1, BD-204-2, BD-205-1, BD-205-2, BD-206-1, BD-206-2, BD-207-1, BD-207-2, BD-208-1, BD-208-2, BD-209-1, BD-209-2, BD-210-1, BD-210-2, BD-211-1, BD-211-2, BD-212-3, BD-212-4, BD-213-3, BD-213-4, BD-214-1, BD-214-2, BD-215-1, BD-215-2, BD-216-1, BD-216-2 OTHER STATIONS - BD-02-1, BD-02-2, BD-04-1, BD-04-2, BD-05-1, BD-05-2, BD-06-1, BD-06-2, BD-19-1, BD-19-2, BD-20-1, BD-20-2, BD-21-1, BD-21-2 CONTROL STATIONS - BD-03-1, BD-03-2 ISFSI STATIONS - BD-104-3, BD-104-4, BD-105-3, BD-105-4, BD-110-3, BD-110-4 C-23

FIGURE C-1 Surface Water - Gross Beta - Stations BD-10 and BD-25 (C)

Collected in the Vicinity of Braidwood Station, 2000 - 2015 BD-10 Kankaee River, Downstream 10.0 8.0 6.0 pCi/L 4.0 2.0 0.0 01-01-00 01-01-03 01-01-06 01-01-09 01-02-12 01-02-15 BD-25 (C) Kankakee River, Upstream 16.0 14.0 12.0 10.0 pCi/L 8.0 6.0 4.0 2.0 0.0 01-01-00 01-01-03 01-01-06 01-01-09 01-02-12 01-02-15 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-24

FIGURE C-2 Surface Water - Gross Beta - Stations BD-38 and BD-40 Collected in the Vicinity of Braidwood Station, 2007 - 2015 BD-38 Main Drainage Ditch 14.0 12.0 10.0 pCi/L 8.0 6.0 4.0 2.0 0.0 01-25-07 08-27-08 03-30-10 10-31-11 06-02-13 01-03-15 BD-40 Braidwood Station Cooling Lake 16.0 14.0 12.0 10.0 pCi/L 8.0 6.0 4.0 2.0 0.0 10-05-06 05-29-08 01-21-10 09-15-11 05-09-13 01-01-15 C-25

FIGURE C-3 Surface Water - Gross Beta - Stations BD-55 and BD-56 Collected in the Vicinity of Braidwood Station, 2007 - 2015 BD-55 North Pond Fatlan Site 14.0 12.0 10.0 pCi/L 8.0 6.0 4.0 2.0 0.0 01-25-07 08-27-08 03-30-10 10-31-11 06-02-13 01-03-15 BD-56 South Pond Fatlan Site 10.0 8.0 6.0 pCi/L 4.0 2.0 0.0 01-25-07 08-27-08 03-30-10 10-31-11 06-02-13 01-03-15 GAPS IN DATA ARE DUE TO SAMPLING POINTS BEING FROZEN AT TIME OF COLLECTION C-26

FIGURE C-4 Surface Water - Tritium - Stations BD-10 and BD-25 (C)

Collected in the Vicinity of Braidwood Station, 2000 - 2015 BD-10 Kankakee River, Downstream 3000 2500 2000 pCi/L 1500 1000 500 0

03-25-00 03-09-03 02-20-06 02-03-09 01-18-12 01-01-15 BD-25 (C) Kankakee River, Upstream 400 300 pCi/L 200 100 0

03-25-00 03-09-03 02-20-06 02-03-09 01-18-12 01-01-15 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-27

FIGURE C-5 Surface Water - Tritium - Stations BD-38 and BD-40 Collected in the Vicinity of Braidwood Station, 2006 - 2015 BD-38 Main Drainage Ditch 2400 2100 1800 1500 pCi/L 1200 900 600 300 0

03-09-06 12-13-07 09-17-09 06-23-11 03-28-13 01-01-15 BD-40 Braidwood Station Cooling Lake 400 300 pCi/L 200 100 0

07-20-06 03-28-08 12-05-09 08-14-11 04-22-13 12-30-14 C-28

FIGURE C-6 Surface Water - Tritium - Stations BD-55 and BD-56 Collected in the Vicinity of Braidwood Station, 2007 - 2015 BD-55 North Pond Fatlan Site 250 200 150 pCi/L 100 50 0

03-29-07 10-16-08 05-06-10 11-24-11 06-13-13 01-01-15 BD-56 South Pond Fatlan Site 250 200 150 pCi/L 100 50 0

03-29-07 10-16-08 05-06-10 11-24-11 06-13-13 01-01-15 C-29

FIGURE C-7 Public Water - Gross Beta - Station BD-22 Collected in the Vicinity of Braidwood Station, 2000 - 2015 BD-22 Wilmington 10.0 8.0 6.0 pCi/L 4.0 2.0 0.0 01-29-00 01-23-03 01-17-06 01-11-09 01-06-12 12-31-14 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-30

FIGURE C-8 Public Water - Tritium - Station BD-22 Collected in the Vicinity of Braidwood Station, 2000 - 2015 BD-22 Wilmington 7600 7200 6800 6400 6000 5600 5200 4800 4400 pCi/L 4000 3600 3200 2800 2400 2000 1600 1200 800 400 0

01-29-00 01-23-03 01-17-06 01-11-09 01-06-12 12-31-14 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C-31

FIGURE C-9 Ground/Well Water - Tritium - Stations BD-13 and BD-34 Collected in the Vicinity of Braidwood Station, 2000 - 2015 BD-13 Braidwood City Hall Well 500 400 300 pCi/L 200 100 0

01-07-00 01-05-03 01-03-06 01-01-09 12-31-11 12-29-14 BD-34 Gibson Well 700 600 500 400 pCi/L 300 200 100 0

01-07-00 01-05-03 01-03-06 01-01-09 12-31-11 12-29-14 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JULY.

C-32

FIGURE C-10 Ground/Well Water - Tritium - Stations BD-35 and BD-36 Collected in the Vicinity of Braidwood Station, 2000 - 2015 BD-35 Joly Well 500 400 300 pCi/L 200 100 0

01-07-00 01-05-03 01-03-06 01-01-09 12-31-11 12-29-14 BD-36 Hutton Well 1200 1000 800 pCi/L 600 400 200 0

01-07-00 01-05-03 01-03-06 01-01-09 12-31-11 12-29-14 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JULY.

C-33

FIGURE C-11 Ground/Well Water - Tritium - Station BD-37 Collected in the Vicinity of Braidwood Station, 2000 - 2015 BD-37 Nurczyk Well 600 500 400 pCi/L 300 200 100 0

01-07-00 01-05-03 01-03-06 01-01-09 12-31-11 12-29-14 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JULY.

C-34

FIGURE C-12 Ground/Well Water - Tritium - Station BD-50 and BD-51 Collected in the Vicinity of Braidwood Station, 2007 - 2015 BD-50 Skole Well 1000 900 800 700 600 pCi/L 500 400 300 200 100 0

01-01-07 08-07-08 03-14-10 10-19-11 05-25-13 12-30-14 BD-51 Fatlan Well 600 500 400 pCi/L 300 200 100 0

01-03-07 08-09-08 03-16-10 10-21-11 05-27-13 01-01-15 NEW STATIONS BD-50 AND BD-51 ADDED IN 2007 STATION BD-50 WAS INITIALLY DISCONTINUED ON 10/18/07 AND RESUMED ON 04/08/10 C-35

FIGURE C-13 Ground/Well Water - Tritium - Stations BD-53 and BD-54 Collected in the Vicinity of Braidwood Station, 2007 - 2015 BD-53 Phelps Well 600 500 400 pCi/L 300 200 100 0

01-03-07 11-03-07 09-02-08 07-03-09 05-03-10 03-03-11 01-01-12 BD-54 Cash Well 600 500 400 pCi/L 300 200 100 0

01-03-07 08-09-08 03-16-10 10-21-11 05-27-13 01-01-15 BD-53 was removed from the program during the 3rd quarter of 2011 C-36

FIGURE C-14 Air Particulate - Gross Beta- Stations BD-03 (C) and BD-06 Collected in the Vicinity of Braidwood Station, 2000 - 2015 BD-03 (C) County Line Road 80.0 60.0 10E-03 pCi/m3 40.0 20.0 0.0 01-07-00 01-06-03 01-05-06 01-04-09 01-04-12 01-03-15 BD-06 Godley 60.0 50.0 10E-03 pCi/m3 40.0 30.0 20.0 10.0 0.0 01-07-00 01-06-03 01-05-06 01-04-09 01-04-12 01-03-15 C-37

FIGURE C-15 Air Particulate - Gross Beta- Stations BD-19 and BD-20 Collected in the Vicinity of Braidwood Station, 2000 - 2015 BD-19 Near Field, NW 60.0 50.0 40.0 10E-03 pCi/m3 30.0 20.0 10.0 0.0 01-07-00 01-06-03 01-05-06 01-04-09 01-04-12 01-03-15 BD-20 Near Field, N 70.0 60.0 50.0 10E-03 pCi/m3 40.0 30.0 20.0 10.0 0.0 01-07-00 01-06-03 01-05-06 01-04-09 01-04-12 01-03-15 C-38

FIGURE C-16 Air Particulate - Gross Beta- Station BD-21 Collected in the Vicinity of Braidwood Station, 2000 - 2015 BD-21 Near Field, NE 70.0 60.0 50.0 10E-03 pCi/m3 40.0 30.0 20.0 10.0 0.0 01-07-00 01-06-03 01-05-06 01-04-09 01-04-12 01-03-15 C-39

FIGURE C-17 Air Particulate - Gross Beta- Stations BD-02 and BD-04 Collected in the Vicinity of Braidwood Station, 2005 - 2015 BD-02 Near Field, NW 60.0 50.0 40.0 10E-03 pCi/m3 30.0 20.0 10.0 0.0 07-07-05 05-31-07 04-23-09 03-17-11 02-07-13 01-01-15 BD-04 Near Field, N 60.0 50.0 10E-03 pCi/m3 40.0 30.0 20.0 10.0 0.0 07-07-05 05-31-07 04-23-09 03-17-11 02-07-13 01-01-15 C-40

FIGURE C-18 Air Particulate - Gross Beta- Station BD-05 Collected in the Vicinity of Braidwood Station, 2005 - 2015 BD-05 Near Field, NE 60.0 50.0 40.0 10E-03 pCi/m3 30.0 20.0 10.0 0.0 07-07-05 05-31-07 04-23-09 03-17-11 02-07-13 01-01-15 C-41

Intentionally left blank APPENDIX D INTER-LABORATORY COMPARISON PROGRAM

Intentionally left blank TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2015 (PAGE 1 OF 3)

Identification Reported Known Ratio (c)

Month/Year Number Matrix Nuclide Units Value (a) Value (b) TBE/Analytics Evaluation (d)

March 2015 E11181 Milk Sr-89 pCi/L 88.9 97.2 0.91 A Sr-90 pCi/L 12.2 17.4 0.70 W E11182 Milk I-131 pCi/L 61.3 65.1 0.94 A Ce-141 pCi/L 104 113 0.92 A Cr-51 pCi/L 265 276 0.96 A Cs-134 pCi/L 138 154 0.90 A Cs-137 pCi/L 205 207 0.99 A Co-58 pCi/L 178 183 0.97 A Mn-54 pCi/L 187 188 0.99 A Fe-59 pCi/L 182 177 1.03 A Zn-65 pCi/L 345 351 0.98 A Co-60 pCi/L 379 405 0.94 A E11184 AP Ce-141 pCi 107 85.0 1.26 W Cr-51 pCi 261 224 1.17 A Cs-134 pCi 74.6 77.0 0.97 A Cs-137 pCi 99.6 102 0.98 A Co-58 pCi 99.8 110 0.91 A Mn-54 pCi 99.2 96.9 1.02 A Fe-59 pCi 109 119 0.92 A Zn-65 pCi 188 183 1.03 A Co-60 pCi 200 201 1.00 A E11183 Charcoal I-131 pCi 82.9 85.4 0.97 A E11185 Water Fe-55 pCi/L 1950 1900 1.03 A June 2015 E11234 Milk Sr-89 pCi/L 94.9 92.6 1.02 A Sr-90 pCi/L 14.3 12.7 1.13 A E11238 Milk I-131 pCi/L 93.2 95.9 0.97 A Ce-141 pCi/L Not provided for this study Cr-51 pCi/L 349 276 1.26 W Cs-134 pCi/L 165 163 1.01 A Cs-137 pCi/L 143 125 1.14 A Co-58 pCi/L 82.0 68.4 1.20 A Mn-54 pCi/L 113 101 1.12 A Fe-59 pCi/L 184 151 1.22 W Zn-65 pCi/L 269 248 1.08 A Co-60 pCi/L 208 193 1.08 A E11237 AP Ce-141 pCi Not provided for this study Cr-51 pCi 323 233 1.39 N (1)

Cs-134 pCi 139 138 1.01 A Cs-137 pCi 111 106 1.05 A Co-58 pCi 54.0 57.8 0.93 A Mn-54 pCi 96.8 84.9 1.14 A Fe-59 pCi 162 128 1.27 W Zn-65 pCi 198 210 0.94 A Co-60 pCi 178 163 1.09 A E11236 Charcoal I-131 pCi 93.9 80 1.17 A D-1

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2015 (PAGE 2 OF 3)

Identification Reported Known Ratio (c)

Month/Year Number Matrix Nuclide Units Value (a) Value (b) TBE/Analytics Evaluation (d)

June 2015 E11238 Water Fe-55 pCi/L 1890 1790 1.06 A September 2015 E11289 Milk Sr-89 pCi/L 95.7 99.1 0.97 A Sr-90 pCi/L 15.4 16.4 0.94 A E11290 Milk I-131 pCi/L 94.9 99.9 0.95 A Ce-141 pCi/L 228 213 1.07 A Cr-51 pCi/L 499 538 0.93 A Cs-134 pCi/L 208 212 0.98 A Cs-137 pCi/L 270 255 1.06 A Co-58 pCi/L 275 263 1.05 A Mn-54 pCi/L 320 290 1.10 A Fe-59 pCi/L 255 226 1.13 A Zn-65 pCi/L 392 353 1.11 A Co-60 pCi/L 350 330 1.06 A E11292 AP Ce-141 pCi 104 85.1 1.22 W Cr-51 pCi 262 215 1.22 W Cs-134 pCi 86.1 84.6 1.02 A Cs-137 pCi 93 102 0.91 A Co-58 pCi 106 105 1.01 A Mn-54 pCi 117 116 1.01 A Fe-59 pCi 94.8 90.2 1.05 A Zn-65 pCi 160 141 1.13 A Co-60 pCi 146 132 1.11 A E11291 Charcoal I-131 pCi 85.9 81.7 1.05 A E11293 Water Fe-55 pCi/L 2090 1800 1.16 A E11294 Soil Ce-141 pCi/kg 209 222 0.94 A Cr-51 pCi/kg 463 560 0.83 A Cs-134 pCi/kg 231 221 1.05 A Cs-137 pCi/kg 311 344 0.90 A Co-58 pCi/kg 245 274 0.89 A Mn-54 pCi/kg 297 302 0.98 A Fe-59 pCi/kg 248 235 1.06 A Zn-65 pCi/kg 347 368 0.94 A Co-60 pCi/kg 328 344 0.95 A December 2015 E11354 Milk Sr-89 pCi/L 96.2 86.8 1.11 A Sr-90 pCi/L 14.8 12.5 1.18 A E11355 Milk I-131 pCi/L 95.1 91.2 1.04 A Ce-141 pCi/L 117 129 0.91 A Cr-51 pCi/L 265 281 0.94 A Cs-134 pCi/L 153 160 0.96 A Cs-137 pCi/L 119 115 1.03 A Co-58 pCi/L 107 110 0.97 A Mn-54 pCi/L 153 145 1.06 A Fe-59 pCi/L 117 108 1.08 A Zn-65 pCi/L 261 248 1.05 A Co-60 pCi/L 212 213 1.00 A D-2

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2015 (PAGE 3 OF 3)

Identification Reported Known Ratio (c)

Month/Year Number Matrix Nuclide Units Value (a) Value (b) TBE/Analytics Evaluation (d)

December 2015 E11357 AP Ce-141 pCi 89.9 84.0 1.07 A Cr-51 pCi 215 184 1.17 A Cs-134 pCi 103 105 0.98 A Cs-137 pCi 76.6 74.8 1.02 A Co-58 pCi 76.2 71.9 1.06 A Mn-54 pCi 91.4 94.4 0.97 A Fe-59 pCi 78.6 70.3 1.12 A Zn-65 pCi 173 162 1.07 A Co-60 pCi 138 139 0.99 A E11422 AP Sr-89 pCi 98.0 96.9 1.01 A Sr-90 pCi 10.0 14.0 0.71 W E11356 Charcoal I-131 pCi 74.9 75.2 1.00 A E11358 Water Fe-55 pCi/L 2160 1710 1.26 W E11353 Soil Ce-141 pCi/kg 252 222 1.14 A Cr-51 pCi/kg 485 485 1.00 A Cs-134 pCi/kg 319 277 1.15 A Cs-137 pCi/kg 292 276 1.06 A Co-58 pCi/kg 193 190 1.02 A Mn-54 pCi/kg 258 250 1.03 A Fe-59 pCi/kg 218 186 1.17 A Zn-65 pCi/kg 457 429 1.07 A Co-60 pCi/kg 381 368 1.04 A (1) AP Cr Cr-51 has the shortest half-life and the weakest gamma energy of the mixed nuclide sample, which produces a large error. Taking into account the error, the lowest value would be 119% of the reference value, which would be considered acceptable. NCR 15-18 (a) Teledyne Brown Engineering reported result.

(b) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.

(c) Ratio of Teledyne Brown Engineering to Analytics results.

(d) Analytics evaluation based on TBE internal QC limits: A= Acceptable, reported result falls within ratio limits of 0.80-1.20.

W-Acceptable with warning, reported result falls within 0.70-0.80 or 1.20-1.30. N = Not Acceptable, reported result falls outside the ratio limits of < 0.70 and > 1.30.

D-3

TABLE D-2 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)

TELEDYNE BROWN ENGINEERING, 2015 (PAGE 1 OF 1)

Identification Reported Known Acceptance Month/Year Number Media Nuclide* Units Value (a) Value (b) Range Evaluation (c)

March 2015 15-MaW32 Water Am-241 Bq/L 0.632 0.654 0.458 - 0.850 A Ni-63 Bq/L 2.5 (1) A Pu-238 Bq/L 0.0204 0.0089 (2) A Pu-239/240 Bq/L 0.9 0.8 0.582 - 1.082 A 15-MaS32 Soil Ni-63 Bq/kg 392 448.0 314 - 582 A Sr-90 Bq/kg 286 653 487 - 849 N (3) 15-RdF32 AP Sr-90 Bq/sample -0.0991 (1) A U-234/233 Bq/sample 0.0211 0.0155 0.0109 - 0.0202 N (3)

U-238 Bq/sample 0.095 0.099 0.069 - 0.129 A 15-GrF32 AP Gr-A Bq/sample 0.448 1.77 0.53 - 3.01 N (3)

Gr-B Bq/sample 0.7580 0.75 0.38 - 1.13 A 15-RdV32 Vegetation Cs-134 Bq/sample 8.08 7.32 5.12 - 9.52 A Cs-137 Bq/sample 11.6 9.18 6.43 - 11.93 W Co-57 Bq/sample -0.0096 (1) A Co-60 Bq/sample 6.53 5.55 3.89 - 7.22 A Mn-54 Bq/sample 0.0058 (1) A Sr-90 Bq/sample 0.999 1.08 0.76 - 1.40 A Zn-65 Bq/sample -0.108 (1) A September 2015 15-MaW33 Water Am-241 Bq/L 1.012 1.055 0.739 - 1.372 A Ni-63 Bq/L 11.8 8.55 5.99 - 11.12 N (4)

Pu-238 Bq/L 0.727 0.681 0.477 - 0.885 A Pu-239/240 Bq/L 0.830 0.900 0.630 - 1.170 A 15-MaS33 Soil Ni-63 Bq/kg 635 682 477 - 887 A Sr-90 Bq/kg 429 425 298 - 553 A 15-RdF33 AP Sr-90 Bq/sample 1.48 2.18 1.53 - 2.83 N (4)

U-234/233 Bq/sample 0.143 0.143 0.100 - 0.186 A U-238 Bq/sample 0.149 0.148 0.104 - 0.192 A 15-GrF33 AP Gr-A Bq/sample 0.497 0.90 0.27 - 1.53 A Gr-B Bq/sample 1.34 1.56 0.78 - 2.34 A 15-RdV33 Vegetation Cs-134 Bq/sample 6.10 5.80 4.06 - 7.54 A Cs-137 Bq/sample 0.0002 (1) A Co-57 Bq/sample 8.01 6.62 4.63 - 8.61 W Co-60 Bq/sample 4.97 4.56 3.19 - 5.93 A Mn-54 Bq/sample 8.33 7.68 5.38 - 9.98 A Sr-90 Bq/sample 0.386 1.30 0.91 - 1.69 N (4)

(1) False positive test. Zn-65 Bq/sample 6.07 5.46 3.82 - 7.10 A (2) Sensitivity evaluation.

(3) Soil Sr incomplete digestion of the sample resulted in low results; AP U-234/233 - extremely low activity was difficult to quantify AP Gr-A - the MAPEP filter has the activity embedded in the filter. To corrected the low bias, TBE will create an attenuated efficiency for MAPEP samples. NCR 15-13 (4) Water Ni-63 extremely low activity was difficult to quantify; AP & Vegetation Sr-90 was lost during separation, possible from substance added by MAPEP NCR 15-21.

(a) Teledyne Brown Engineering reported result.

(b) The MAPEP known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.

(c) DOE/MAPEP evaluation: A=acceptable, W=acceptable with warning, N=not acceptable.

D-4

TABLE D-3 ERA ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2015 (PAGE 1 OF 1)

Identification Reported Known Acceptance Month/Year Number Media Nuclide Units Value (a) Value (b) Limits Evaluation (c)

May 2015 RAD-101 Water Sr-89 pCi/L 45.2 63.2 51.1 - 71.2 N (1)

Sr-90 pCi/L 28.0 41.9 30.8 - 48.1 N (1)

Ba-133 pCi/L 80.6 82.5 63.9 - 90.8 A Cs-134 pCi/L 71.7 75.7 61.8 - 83.3 A Cs-137 pCi/L 187 189 170 - 210 A Co-60 pCi/L 85.7 84.5 76.0 - 95.3 A Zn-65 pCi/L 197 203 183 - 238 A Gr-A pCi/L 26.1 42.6 22.1 - 54.0 A Gr-B pCi/L 28.8 32.9 21.3 - 40.6 A I-131 pCi/L 23.5 23.8 19.7 - 28.3 A U-Nat pCi/L 6.19 6.59 4.99 - 7.83 A H-3 pCi/L 3145 3280 2770 - 3620 A November 2015 RAD-103 Water Sr-89 pCi/L 40.9 35.7 26.7 - 42.5 A Sr-90 pCi/L 29.3 31.1 22.7 - 36.1 A Ba-133 pCi/L 31.5 32.5 25.9 - 36.7 A Cs-134 pCi/L 59.65 62.3 50.6 - 68.5 A Cs-137 pCi/L 156 157 141 - 175 A Co-60 pCi/L 70.6 71.1 64.0 - 80.7 A Zn-65 pCi/L 145 126 113 - 149 A Gr-A pCi/L 38.2 51.6 26.9 - 64.7 A Gr-B pCi/L 42.0 36.6 24.1 - 44.2 A I-131 pCi/L 24.8 26.3 21.9 - 31.0 A U-Nat pCi/L 146.90 56.2 45.7 - 62.4 N (2)

H-3 pCi/L 21100 21300 18700 - 23400 A (1) Yield on the high side of our acceptance range indicates possibility of calcium interference. NCR 15-09 (2) Technician failed to dilute original sample. If dilulted, the result would have been 57.1, which fell within the acceptance limits. NCR 15-19 (a) Teledyne Brown Engineering reported result.

(b) The ERA known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.

(c) ERA evaluation: A=acceptable. Reported result falls within the Warning Limits. NA=not acceptable. Reported result falls outside of the Control Limits. CE=check for Error. Reported result falls within the Control Limits and outside of the Warning Limit.

D-5

Intentionally left blank APPENDIX E EFFLUENT DATA

Intentionally left blank TABLE OF CONTENTS INTRODUCTION ................................................................................................................. 1

SUMMARY

........................................................................................................................... 2 1.0. EFFLUENTS ..................................................................................................... 3 1.1. Gaseous Effluents to the Atmosphere .................................................. 3 1.2. Liquids Released to Kankakee River .................................................... 3 2.0. SOLID RADIOACTIVE WASTE ....................................................................... 3 3.0. DOSE TO MAN................................................................................................. 4 3.1. Gaseous Effluent Pathways .................................................................. 4 3.1.1. Noble Gases ............................................................................ 4 3.1.1.1. Gamma Dose Rates.................................................. 4 3.1.1.2. Beta Air and Skin Dose Rate .................................... 4 3.1.2. Radioactive Iodine & Particulate ............................................. 5 3.2. Liquid Effluent Pathways ....................................................................... 5 3.3. Assessment of Dose to Member of Public ............................................ 6 4.0. SITE METEOROLOGY .................................................................................... 6 i

Table of Contents (cont.)

APPENDIX E-1 DATA TABLES AND FIGURES ............................................................. E-1.1 Station Releases Table 1.1-1 Gaseous Effluents Summation of all Releases ........................ E-1.2 Table 1.2-1 Liquid Effluents Summation of all Releases ............................. E-1.4 Table 3.1-1 Maximum Doses Resulting from Airborne Releases ................ E-1.6 Table 3.2-1 Maximum Doses Resulting from Liquid Effluents ..................... E-1.16 Table 3.3-1 10CFR20 Compliance Assessment .......................................... E-1.26 Table 3.4-1 Maximum Doses Resulting from Airborne Releases Based On Concurrent Meteorological Data ......................................... E-1.28 ii

INTRODUCTION Braidwood Station, a two-unit PWR station, is located in Will County, Illinois, fifteen (15) miles south-southwest of Joliet, Illinois. Each reactor is designed to have a capacity of 3,587 thermal megawatts. Unit No. 1 went critical on May 29, 1987, and Unit No. 2 went critical on March 8, 1988. The station has been designed to keep releases to the environment at levels below those specified in the regulations.

Liquid effluents from Braidwood Station are released to the Kankakee River in controlled batches after radioassay of each batch. Gaseous effluents are released to the atmosphere and are calculated on the basis of analyses of grab samples of noble gases and tritium, as well as continuously collected composite samples of iodine and particulate activity sampled during the course of the year. The results of effluent analyses are summarized on a monthly basis. Airborne concentrations of noble gases, I-131, and particulate radioactivity in offsite areas are calculated using effluent and meteorological data. Carbon-14 concentration in offsite areas is calculated based on industry-approved methodology for estimation of the amount released and meteorological data.

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

Liquid pathways include potable water and freshwater fish. The critical pathway for 2015 gaseous dose was vegetation. The critical pathway for 2015 liquid dose was fresh water fish.

1

SUMMARY

Calculations based on gaseous and liquid effluents, Kankakee River Flow and meteorological data indicate that public dose due to radioactive material attributable to Braidwood Station during the period does not exceed regulatory or Offsite Dose Calculation Manual (ODCM) limits.

The maximally exposed individuals total body dose due to gaseous and liquid emissions from licensed activities at Braidwood Station is 5.81E-01 mrem.

The assessment of radiation doses to the public is performed in accordance with the ODCM. The results of these analyses confirm that the station is operating in compliance with 10CFR50 Appendix I, 10CFR20 and 40CFR190.

2

1.0 EFFLUENTS 1.1 Gaseous Effluents to the Atmosphere Measured concentrations of noble gases, radioiodine, carbon-14, tritium, and particulate radioactivity released to the atmosphere during the year, are listed in Table 1.1-1.

A total of 1.21E-01 curies of fission and activation gases were released with a maximum quarterly average release rate of 4.13E-03 µCi/sec for Unit 1 and 4.13E-03 µCi/sec for Unit 2.

A total of 1.48E-04 curies of radioiodine were released during the year with a maximum average quarterly release rate of 6.55E-06 µCi/sec for Unit 1 and 1.11E-05 µCi/sec for Unit 2.

A total of 1.76-05 curies of beta-gamma emitters were released as airborne particulate matter with a maximum average release rate of 2.21E-06 µCi/sec for Unit 1 and <LLD µCi/sec for Unit 2.

Alpha-emitting radionuclides were below the lower limit of detection (LLD) for the year.

A total of 2.74E+02 curies of tritium were released with a maximum average quarterly release rate of 4.47E+00 µCi/sec for Unit 1 and 7.92E+00 µCi/sec for Unit 2.

A total of 8.48E+00 curies of C-14 was released with a maximum average quarterly release rate of 1.41E-01 uCi/sec from Unit 1 and 1.41E-01 uCi/sec from Unit 2.

Alpha-emitting radionuclides were less than the LLD for the year.

1.2 Liquids Released to Kankakee River A total of 7.58E+06 liters of radioactive liquid wastes (prior to dilution) containing 1.33E-01 curies (excluding tritium, noble gases and alpha) were discharged from the station. These wastes were released at a maximum quarterly diluted average concentration of 4.30E-09 µCi/ml.

Alpha-emitting radionuclides were less than the LLD for the year. A total of 3.20E+03 curies of tritium were released from the station.

Quarterly release activities are given in Table 1.2-1.

2.0 SOLID RADIOACTIVE WASTE Solid radioactive wastes were shipped by truck to the Envirocare of Utah and 3

Waste Control Specialists disposal facilities and various waste processors.

For details, refer to the Braidwood Station 2015 Radioactive Effluent Release Report.

3.0 DOSE TO MAN 3.1 Gaseous Effluent Pathways Table 3.1-1 summarizes the doses resulting from releases of airborne radioactivity via the different exposure pathways.

3.1.1 Noble Gases 3.1.1.1 Gamma Dose Rates Offsite Gamma air and total body dose rates are shown in Table 3.1-1 and were calculated based on measured effluents and average meteorological data. Based on measured effluents and average meteorological data, the maximum total body dose to an individual would be 5.18E-01 mrem for the year (Table 3.1-1) with an occupancy or shielding factor of 0.7 used. The maximum total body dose based on measured effluents and concurrent meteorological data would be 6.20E-01 mrem (Table 3.4-1). The maximum gamma air dose was 2.45E-06 mrad (Table 3.1-1) based on measured effluents and average meteorological data and 4.76E-01 mrad based on concurrent meteorological date (Table 3.4-1).

3.1.1.2 Beta Air and Skin Dose Rates The range of beta particles in air is relatively small (on the order of a few meters or less); consequently, plumes of gaseous effluents may be considered "infinite" for purpose of calculating the dose from beta radiation incident on the skin. However, the actual dose to sensitive skin tissues is difficult to calculate due to the effect of the beta particle energies, thickness of inert skin and clothing covering sensitive tissues. For purposes of this report the skin is taken to have a thickness of 7.0 mg/cm2 and an occupancy factor of 1.0 is used. The skin dose from beta and gamma radiation for the year 4

was 1.19E-04 mrem based on concurrent meteorological data (Table 3.4-1).

The maximum offsite beta air dose for the year was 5.28E-06 mrad (Table 3.1-1) based on measured effluents and average meteorological data and 6.35E-06 mrad based on concurrent meteorological data (Table 3.4-1).

3.1.2 Radioactive Iodine & Particulate The human thyroid exhibits a significant capacity to concentrate ingested or inhaled iodine. I-131 released during routine operation of the station may be made available to man resulting in a dose to the thyroid. C-14 is also included in this category. C-14 exhibits a capacity to concentrate in bone.

C-14 is released in gaseous form and is absorbed into vegetation through photosynthesis. The principal pathways of interest for C-14 are the consumption of vegetation by humans and milk from which animals have ingested C-14 through the consumption of vegetation. With the inclusion of C-14 in plant effluent calculations, human dose in this category is primarily driven by the release of C-14 from the plant.

The hypothetical dose to the maximum exposed individual living near the station via ingestion of milk and vegetation was calculated. The source of milk and vegetation was assumed to be at the nearest site boundary with the cows pastured and vegetation grown from May through October. The maximum dose from radioactive iodine and particulate (including C-14) to any organ was 2.27E+00 mrem (child/bone) based on measured effluents and average meteorological data and 2.75E+00 mrem based on concurrent meteorological data.

The maximum dose from radioactive iodine and particulate (including C-14) to the whole body was 5.18E-01 mrem (child) based on measured effluents and average meteorological data and 6.20E-01 mrem based on concurrent meteorological data.

3.2 Liquid Effluent Pathways The three principal pathways through the aquatic environment for potential doses to man from liquid waste are ingestion of potable water, eating aquatic foods, and exposure while on the shoreline. Not all of these pathways are significant or applicable at a given time or station but a reasonable approximation of the dose can be made by 5

adjusting the dose formula for season of the year or type and degree of use of the aquatic environment. NRC developed equations were used to calculate the doses to the whole body, lower GI tracts, thyroid, bone and skin; specific parameters for use in the equations are given in the Braidwood Offsite Dose Calculation Manual. The maximum whole body dose and any organ dose for the year was 6.32E-02 mrem (Table 3.2-1 [child]) and 1.01E-01 mrem, respectively (Table 3.2-1 [adult]).

3.3 Assessment of Dose to Member of Public During the period January to December, 2015, Braidwood Station did not exceed the following limits as shown in Table 3.1-1 and Table 3.2-1 (based on annual average meteorological data), Table 3.4-1 (based on concurrent meteorological data), and Table 3.3-1:

The RETS limits on dose or dose commitment to an individual due to radioactive materials in liquid effluents from each reactor unit (1.5 mrem to the whole body or 5 mrem to any organ during any calendar year; 3 mrem to the whole body or 10 mrem to any organ during the calendar year).

The RETS limits on air dose in noble gases released in gaseous effluents to a member of the public from each reactor unit (5 mrads for gamma radiation or 10 mrad for beta radiation during any calendar quarter; 10 mrad for gamma radiation or 20 mrad for beta radiation during a calendar year).

The RETS limits on dose to a member of the public due to iodine-131, iodine-133, tritium, and radionuclides in particulate form with half-lives greater than eight days in gaseous effluents released from each reactor unit (7.5 mrem to any organ during any calendar quarter; 15 mrem to any organ during any calendar year).

The 10CFR20 limit on Total Effective Dose Equivalent to individual members of the public (100 mrem) during any calendar year.

4.0 SITE METEOROLOGY A summary of the site meteorological measurements taken during each calendar quarter of the year is given in Appendix F. The data are presented as cumulative joint frequency distributions of the wind direction for the 203 level and wind speed class by atmospheric stability class determined from the temperature difference between the 199 and 30 levels. Data recovery 6

for these measurements was 99.2% during 2015.

7

Intentionally left blank APPENDIX E-1 DATA TABLES AND FIGURES

Intentionally left blank Table 1.1-1 BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2015 GAS RELEASES UNIT 1 (Docket Number 50-456)

SUMMATION OF ALL RELEASES Est. Total Units 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Error%

A. Fission and Activation Gas Releases

1. Total Release Activity Ci 1.22E-03 2.90E-03 3.28E-02 2.73E-02 7.59E+00

2. Average Release Rate µCi/sec 1.57E-04 3.69E-04 4.13E-03 3.43E-03

3. Percent of ODCM Limit - gamma % 1.94E-07 4.63E-07 5.22E-06 3.41E-05

4. Percent of ODCM Limit - beta % 4.70E-07 1.12E-06 1.27E-05 1.66E-05 B. Iodine Releases

1. Total Iodine Ci 6.84E-07 5.15E-05 <LLD 7.83E-06 3.32E+01

2. Average Release Rate µCi/sec 8.80E-08 6.55E-06 N/A 9.85E-07

3. Percent of ODCM Limit % 7.70E-07 1.22E-05 N/A 3.65E-06 C. Particulate (> 8 day half-life) Releases

1. Particulates with half-lives > 8 days Ci <LLD <LLD <LLD 1.76E-05 1.98E+01

2. Average Release Rate µCi/sec N/A N/A N/A 2.21E-06

3. Percent of ODCM Limit % N/A N/A N/A 1.24E-06

4. Gross Alpha Radioactivity Ci N/A N/A N/A N/A D. Tritium Releases

1. Total Release Activity Ci 1.79E+01 3.50E+01 3.55E+01 2.36E+01 8.07E+00

2. Average Release Rate µCi/sec 2.30E+00 4.45E+00 4.47E+00 2.97E+00

3. Percent of ODCM Limit % 5.06E-02 9.92E-02 1.01E-01 6.72E-02 E. Gross Alpha Releases

1. Total Release Activity Ci <LLD <LLD <LLD <LLD 1.98E+01

2. Average Release Rate µCi/sec N/A N/A N/A N/A

3. Percent of ODCM limit % N/A N/A N/A N/A F. Carbon-14 Releases

1. Total Release Activity Ci 1.10E+00 9.43E-01 1.12E+00 1.12E+00

2. Average Release Rate µCi/sec 1.41E-01 1.20E-01 1.41E-01 1.41E-01 Note: LLD Values are included in Appendix A of this report.

E-1.1

Table 1.1-1 BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2015 GAS RELEASES UNIT 2 (Docket Number 50-457)

SUMMATION OF ALL RELEASES Est. Total Units 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Error%

A. Fission and Activation Gas Releases

1. Total Activity Released Ci 1.22E-03 2.90E-03 3.28E-02 1.99E-02 7.59E+00

2. Average Release Rate µCi/sec 1.57E-04 3.69E-04 4.13E-03 2.50E-03

3. Percent of ODCM Limit - gamma % 1.94E-07 4.63E-07 5.22E-06 3.18E-06

4. Percent of ODCM Limit - beta % 4.70E-07 1.12E-06 1.27E-05 7.71E-06 B. Iodine Releases

1. Total Iodine Ci <LLD 1.42E-09 9.42E-09 8.81E-05 3.32E+01

2. Average Release Rate µCi/sec N/A 1.81E-10 1.18E-09 1.11E-05

3. Percent of ODCM Limit % N/A 6.62E-10 4.42E-09 1.05E-05 C. Particulate (> 8 day half-life) Releases

1. Particulates with half-lives > 8 days Ci <LLD <LLD <LLD <LLD 1.98E+01

2. Average Release Rate µCi/sec N/A N/A N/A N/A

3. Percent of OCDM Limit % N/A N/A N/A N/A

4. Gross Alpha Radioactivity Ci N/A N/A N/A N/A D. Tritium Releases

1. Total Release Activity Ci 2.73E+01 3.83E+01 6.30E+01 3.30E+01 8.07E+00

2. Average Release Rate µCi/sec 3.51E+00 4.87E+00 7.92E+00 4.15E+00

3. Percent of ODCM Limit % 7.78E-02 1.09E-01 1.79E-01 9.38E-02 E. Gross Alpha Releases

1. Total Release Activity Ci <LLD <LLD <LLD <LLD 1.98E+01

2. Average Release Rate µCi/sec N/A N/A N/A N/A

3. Percent of ODCM Limit % N/A N/A N/A N/A F. Carbon-14 Releases

1. Total Release Activity Ci 1.10E+00 1.02E+00 1.12E+00 9.52E-01

2. Average Release Rate µCi/sec 1.41E-01 1.30E-01 1.41E-01 1.20E-01 Note: LLD Values are included in Appendix A of this report.

E-1.2

Table 1.2-1 BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2015 LIQUID RELEASES UNIT 1 (Docket Number 50-456)

SUMMATION OF ALL RELEASES Est. Total Units 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Error %

A. Fission and Activation Products

1. Total Release Ci 1.89E-02 2.88E-02 7.89E-03 1.07E-02 2.64E+00

2. Average Diluted Concentration µCi/ml 2.07E-09 4.30E-09 1.07E-09 1.35E-09

3. Percent of applicable limit % * * *

B. Tritium

1. Total Release Ci 2.95E+02 4.60E+02 4.35E+02 4.12E+02 5.85E+00

2. Average Diluted Concentration µCi/ml 3.22E-05 6.87E-05 5.91E-05 5.18E-05

3. % of Limit (1E-2 µCi/ml) % 3.22E-01 6.87E-01 5.91E-01 5.18E-01 C. Dissolved Noble Gases

1. Total Release Ci <LLD 2.37E-05 <LLD 4.86E-06 2.64E+00

2. Average Diluted Concentration µCi/ml N/A 3.54E-12 N/A 6.11E-13

3. % of Limit (2E-4 µCi/ml) % N/A 1.77E-06 N/A 3.06E-07 D. Gross Alpha A. Total Release Ci <LLD <LLD <LLD <LLD 1.47E+01 E. Volume of Waste Released liters 5.39E+05 1.08E+06 1.08E+06 1.09E+06 (prior to dilution)

F. Volume of Dilution Water liters 9.15E+09 6.70E+09 7.36E+09 7.95E+09 Note: LLD Values are included in Appendix A of this report.

Note: % Limit Values are included in Appendix C 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.

E-1.3

Table 1.2-1 BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2015 LIQUID RELEASES UNIT 2 (Docket Number 50-457)

SUMMATION OF ALL RELEASES Est. Total Units 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Error %

A. Fission and Activation Products

1. Total Release Ci 1.89E-02 2.88E-02 7.89E-03 1.07E-02 2.64E+00

2. Average Diluted Concentration µCi/ml 2.07E-09 4.30E-09 1.07E-09 1.35E-09

3. Percent of applicable limit % * * *

B. Tritium

1. Total Release Ci 2.95E+02 4.60E+02 4.35E+02 4.12E+02 5.85E+00

2. Average Diluted Concentration µCi/ml 3.22E-05 6.87E-05 5.91E-05 5.18E-05

3. % of Limit (1E-2 µCi/ml) % 3.22E-01 6.87E-01 5.91E-01 5.18E-01 C. Dissolved Noble Gases

1. Total Activity Released Ci <LLD 2.37E-05 <LLD 4.86E-06 2.64E+00

2. Average Diluted Concentration µCi/ml N/A 3.54E-12 N/A 6.11E-13

3. % of Limit (2E-4 µCi/ml) % N/A 1.77E-06 N/A 3.06E-07 D. Gross Alpha

1. Total Release Ci <LLD <LLD <LLD <LLD 1.47E+01 E. Volume of Waste Released liters 5.39E+05 1.08E+06 1.08E+06 1.09E+06 (prior to dilution)

F. Volume of Dilution Water liters 9.15E+09 6.70E+09 7.36E+09 7.95E+09 Note: LLD Values are included in Appendix A of this report.

Note: % Limit Values are included in Appendix C of this report.

This limit is equal to 10 times the concentration values in Appendix B, Table 2, Column 2 to 10CFR20.1001-2402, 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.

E-1.4

Table 3.1-1 RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

REPORT - BY UNIT (Composite Critical Receptor - Limited Analysis)

Release ID...........: 1 All Gas Release Types Period Start Date....: 01/01/2015 00:00 Period End Date......: 01/01/2016 00:00 Period Duration (min): 5.256E+05 Coefficient Type.....: Historical Unit.................: 1

RELEASE DATA ============================================================

Total Release Duration (minutes)...................................... 5.644E+05 Total Release Volume (cf)............................................. 8.037E+10 Average Release Flowrate (cfm)........................................ 1.424E+05 Average Period Flowrate (cfm)......................................... 1.529E+05

NUCLIDE DATA ============================================================

Average ECrcent Nuclide uCi uCi/cc Ratio EC KR-90 0.00E+00 0.00E+00 0.00E+00 1.00E-09 AR-41 7.36E+03 3.23E-12 3.23E-04 1.00E-08 KR-85M 0.00E+00 0.00E+00 0.00E+00 1.00E-07 KR-87 0.00E+00 0.00E+00 0.00E+00 2.00E-08 KR-88 0.00E+00 0.00E+00 0.00E+00 9.00E-09 XE-131M 0.00E+00 0.00E+00 0.00E+00 2.00E-06 XE-133 5.68E+04 2.50E-11 4.99E-05 5.00E-07 F&AG 6.42E+04 2.82E-11 3.73E-04 I-131 8.02E-01 3.53E-16 1.76E-06 2.00E-10 I-132 4.60E+01 2.02E-14 1.01E-06 2.00E-08 I-133 1.32E+01 5.80E-15 5.80E-06 1.00E-09 Iodine 6.00E+01 2.64E-14 8.57E-06 C-14 4.29E+06 1.88E-09 6.28E-01 3.00E-09 Other 4.29E+06 1.88E-09 6.28E-01 H-3 1.12E+08 4.92E-08 4.92E-01 1.00E-07 H-3 1.12E+08 4.92E-08 4.92E-01 AC-227 0.00E+00 0.00E+00 0.00E+00 1.00E-15 SN-117M 1.19E+01 5.22E-15 2.61E-06 2.00E-09 CE-141 5.73E+00 2.52E-15 3.15E-06 8.00E-10 P>=8 1.76E+01 7.74E-15 5.76E-06 E-1.5

Table 3.1-1 RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

REPORT - BY UNIT (Composite Critical Receptor - Limited Analysis)

Release ID...........: 1 All Gas Release Types Period Start Date....: 01/01/2015 00:00 Period End Date......: 01/01/2016 00:00 Period Duration (min): 5.256E+05 Coefficient Type.....: Historical Unit.................: 1

NUCLIDE DATA ============================================================

Average ECrcent Nuclide uCi uCi/cc Ratio EC Total 1.16E+08 5.11E-08 1.12E+00 E-1.6

Table 3.1-1 RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

REPORT - BY UNIT (Composite Critical Receptor - Limited Analysis)

Release ID...........: 1 All Gas Release Types Period Start Date....: 01/01/2015 00:00 Period End Date......: 01/01/2016 00:00 Period Duration (min): 5.256E+05 Coefficient Type.....: Historical Unit.................: 1 Receptor.............: 5 Composite Crit. Receptor - IP Distance (meters)....: 0.0 Compass Point........: 0.0

PERIOD DOSE BY AGEGROUP, PATHWAY, ORGAN (mrem) ==========================

Age/Path Bone Liver Thyroid Kidney Lung GI-Lli Skin TB AGPD 9.46E-08 9.46E-08 9.46E-08 9.46E-08 9.46E-08 9.46E-08 0.00E+00 9.46E-08 AINHL 2.87E-03 3.50E-03 3.50E-03 3.50E-03 3.50E-03 3.50E-03 0.00E+00 3.50E-03 AVEG 1.42E-01 3.36E-02 3.36E-02 3.36E-02 3.36E-02 3.36E-02 0.00E+00 3.36E-02 AGMILK 4.25E-03 4.51E-03 4.59E-03 4.51E-03 4.51E-03 4.51E-03 0.00E+00 4.51E-03 ACMEAT 5.26E-02 1.13E-02 1.13E-02 1.13E-02 1.13E-02 1.13E-02 0.00E+00 1.13E-02 ACMILK 5.73E-02 1.33E-02 1.33E-02 1.33E-02 1.33E-02 1.33E-02 0.00E+00 1.33E-02 TGPD 9.46E-08 9.46E-08 9.46E-08 9.46E-08 9.46E-08 9.46E-08 0.00E+00 9.46E-08 TINHL 4.10E-03 3.75E-03 3.76E-03 3.75E-03 3.75E-03 3.75E-03 0.00E+00 3.75E-03 TVEG 2.29E-01 5.20E-02 5.20E-02 5.20E-02 5.20E-02 5.20E-02 0.00E+00 5.20E-02 TGMILK 7.67E-03 6.29E-03 6.41E-03 6.29E-03 6.29E-03 6.29E-03 0.00E+00 6.29E-03 TCMEAT 4.44E-02 9.33E-03 9.33E-03 9.33E-03 9.33E-03 9.33E-03 0.00E+00 9.33E-03 TCMILK 1.06E-01 2.35E-02 2.36E-02 2.35E-02 2.35E-02 2.35E-02 0.00E+00 2.35E-02 CGPD 9.46E-08 9.46E-08 9.46E-08 9.46E-08 9.46E-08 9.46E-08 0.00E+00 9.46E-08 CINHL 5.67E-03 3.70E-03 3.70E-03 3.70E-03 3.70E-03 3.70E-03 0.00E+00 3.70E-03 CVEG 5.52E-01 1.20E-01 1.20E-01 1.20E-01 1.20E-01 1.20E-01 0.00E+00 1.20E-01 CGMILK 2.46E-01 5.95E-02 5.97E-02 5.95E-02 5.95E-02 5.95E-02 0.00E+00 5.95E-02 CCMEAT 8.35E-02 1.73E-02 1.73E-02 1.73E-02 1.73E-02 1.73E-02 0.00E+00 1.73E-02 CCMILK 2.60E-01 5.56E-02 5.58E-02 5.56E-02 5.56E-02 5.56E-02 0.00E+00 5.56E-02 IGPD 9.46E-08 9.46E-08 9.46E-08 9.46E-08 9.46E-08 9.46E-08 0.00E+00 9.46E-08 IINHL 4.18E-03 2.36E-03 2.36E-03 2.36E-03 2.36E-03 2.36E-03 0.00E+00 2.36E-03 IGMILK 5.10E-01 1.20E-01 1.21E-01 1.20E-01 1.20E-01 1.20E-01 0.00E+00 1.20E-01 ICMILK 5.10E-01 1.14E-01 1.15E-01 1.14E-01 1.14E-01 1.14E-01 0.00E+00 1.14E-01

PERIOD DOSE BY AGEGROUP, ORGAN (mrem) ===================================

Agegroup Bone Liver Thyroid Kidney Lung GI-Lli Skin TB ADULT 2.59E-01 6.61E-02 6.63E-02 6.61E-02 6.61E-02 6.61E-02 0.00E+00 6.61E-02 TEEN 3.91E-01 9.49E-02 9.51E-02 9.49E-02 9.49E-02 9.49E-02 0.00E+00 9.49E-02 CHILD 1.15E+00 2.56E-01 2.57E-01 2.56E-01 2.56E-01 2.56E-01 0.00E+00 2.56E-01 INFANT 1.02E+00 2.37E-01 2.38E-01 2.37E-01 2.37E-01 2.37E-01 0.00E+00 2.37E-01 E-1.7

Table 3.1-1 RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

REPORT - BY UNIT (Composite Critical Receptor - Limited Analysis)

Release ID...........: 1 All Gas Release Types Period Start Date....: 01/01/2015 00:00 Period End Date......: 01/01/2016 00:00 Period Duration (min): 5.256E+05 Coefficient Type.....: Historical Unit.................: 1 Receptor.............: 5 Composite Crit. Receptor - IP Distance (meters)....: 0.0 Compass Point........: 0.0

MAXIMUM PERIOD DOSE TO LIMIT (Any Organ) ================================

Dose Age Dose Limit Admin Admin % T.Spec T.Spec %

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End CHILD BONE 1.15E+00 31-day 2.25E-01 5.10E+02 3.00E-01 3.83E+02 Qrtr->End CHILD BONE 1.15E+00 Quarter 5.63E+00 2.04E+01 7.50E+00 1.53E+01 Year->End CHILD BONE 1.15E+00 Annual 1.13E+01 1.02E+01 1.50E+01 7.66E+00 Critical Pathway........: 2 Vegetation (VEG)

Major Contributors......: 0.0 % or greater to total Nuclide Percentage H-3 0.00E+00 C-14 1.00E+02 I-131 1.11E-04 I-132 2.91E-06 I-133 2.69E-05 CE-141 4.45E-06

MAXIMUM PERIOD DOSE TO LIMIT (Tot Body)) ================================

Dose Age Dose Limit Admin Admin % T.Spec T.Spec %

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End CHILD TBODY 2.56E-01 31-day 1.50E-01 1.71E+02 2.00E-01 1.28E+02 Qrtr->End CHILD TBODY 2.56E-01 Quarter 5.25E+00 4.88E+00 7.50E+00 3.42E+00 Year->End CHILD TBODY 2.56E-01 Annual 1.05E+01 2.44E+00 1.50E+01 1.71E+00 Critical Pathway........: 2 Vegetation (VEG)

Major Contributors......: 0.0 % or greater to total Nuclide Percentage H-3 9.33E+00 C-14 9.06E+01 I-131 2.85E-04 I-132 1.29E-05 I-133 6.01E-05 CE-141 1.62E-05 E-1.8

Table 3.1-1 RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

REPORT - BY UNIT (Composite Critical Receptor - Limited Analysis)

Release ID...........: 1 All Gas Release Types Period Start Date....: 01/01/2015 00:00 Period End Date......: 01/01/2016 00:00 Period Duration (min): 5.256E+05 Coefficient Type.....: Historical Unit.................: 1 Receptor.............: 4 Composite Crit. Receptor - NG Distance (meters)....: 0.0 Compass Point........: 0.0

MAXIMUM PERIOD NG DOSE TO LIMIT (Gamma) =================================

Dose Dose Limit Admin Admin % T.Spec T.Spec %

Period Dose Type (mrad) Period Limit of Limit Limit of Limit Strt->End Gamma 2.00E-06 31-day 1.50E-01 1.33E-03 2.00E-01 9.99E-04 Qrtr->End Gamma 2.00E-06 Quarter 3.75E+00 5.33E-05 5.00E+00 4.00E-05 Year->End Gamma 2.00E-06 Annual 7.50E+00 2.66E-05 1.00E+01 2.00E-05 Major Contributors......: 0.0 % or greater to total Nuclide Percentage KR-90 0.00E+00 AR-41 7.73E+01 KR-85M 0.00E+00 KR-87 0.00E+00 KR-88 0.00E+00 XE-131M 0.00E+00 XE-133 2.27E+01

MAXIMUM PERIOD NG DOSE TO LIMIT (Beta)) =================================

Dose Dose Limit Admin Admin % T.Spec T.Spec %

Period Dose Type (mrad) Period Limit of Limit Limit of Limit Strt->End Beta 3.08E-06 31-day 3.00E-01 1.03E-03 4.00E-01 7.71E-04 Qrtr->End Beta 3.08E-06 Quarter 7.50E+00 4.11E-05 1.00E+01 3.08E-05 Year->End Beta 3.08E-06 Annual 1.50E+01 2.06E-05 2.00E+01 1.54E-05 Major Contributors......: 0.0 % or greater to total Nuclide Percentage KR-90 0.00E+00 AR-41 2.88E+01 KR-85M 0.00E+00 KR-87 0.00E+00 KR-88 0.00E+00 XE-131M 0.00E+00 XE-133 7.12E+01 E-1.9

Table 3.1-1 RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

REPORT - BY UNIT (Composite Critical Receptor - Limited Analysis)

Release ID...........: 1 All Gas Release Types Period Start Date....: 01/01/2015 00:00 Period End Date......: 01/01/2016 00:00 Period Duration (min): 5.256E+05 Coefficient Type.....: Historical Unit.................: 2

RELEASE DATA ============================================================

Total Release Duration (minutes)...................................... 5.541E+05 Total Release Volume (cf)............................................. 6.836E+10 Average Release Flowrate (cfm)........................................ 1.234E+05 Average Period Flowrate (cfm)......................................... 1.301E+05

NUCLIDE DATA ============================================================

Average ECrcent Nuclide uCi uCi/cc Ratio EC AR-41 0.00E+00 0.00E+00 0.00E+00 1.00E-08 KR-85M 0.00E+00 0.00E+00 0.00E+00 1.00E-07 KR-87 0.00E+00 0.00E+00 0.00E+00 2.00E-08 KR-89 0.00E+00 0.00E+00 0.00E+00 1.00E-09 XE-131M 0.00E+00 0.00E+00 0.00E+00 2.00E-06 XE-133 5.68E+04 2.94E-11 5.87E-05 5.00E-07 F&AG 5.68E+04 2.94E-11 5.87E-05 I-131 2.65E-01 1.37E-16 6.84E-07 2.00E-10 I-132 8.78E+01 4.54E-14 2.27E-06 2.00E-08 I-133 2.45E-02 1.27E-17 1.27E-08 1.00E-09 Iodine 8.81E+01 4.55E-14 2.96E-06 C-14 4.19E+06 2.17E-09 7.22E-01 3.00E-09 Other 4.19E+06 2.17E-09 7.22E-01 H-3 1.62E+08 8.35E-08 8.35E-01 1.00E-07 H-3 1.62E+08 8.35E-08 8.35E-01 AC-227 0.00E+00 0.00E+00 0.00E+00 1.00E-15 P>=8 0.00E+00 0.00E+00 0.00E+00 Total 1.66E+08 8.57E-08 1.56E+00 E-1.10

Table 3.1-1 RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

REPORT - BY UNIT (Composite Critical Receptor - Limited Analysis)

Release ID...........: 1 All Gas Release Types Period Start Date....: 01/01/2015 00:00 Period End Date......: 01/01/2016 00:00 Period Duration (min): 5.256E+05 Coefficient Type.....: Historical Unit.................: 2 E-1.11

Table 3.1-1 RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

REPORT - BY UNIT (Composite Critical Receptor - Limited Analysis)

Release ID...........: 1 All Gas Release Types Period Start Date....: 01/01/2015 00:00 Period End Date......: 01/01/2016 00:00 Period Duration (min): 5.256E+05 Coefficient Type.....: Historical Unit.................: 2 Receptor.............: 5 Composite Crit. Receptor - IP Distance (meters)....: 0.0 Compass Point........: 0.0

PERIOD DOSE BY AGEGROUP, PATHWAY, ORGAN (mrem) ==========================

Age/Path Bone Liver Thyroid Kidney Lung GI-Lli Skin TB AGPD 5.93E-08 5.93E-08 5.93E-08 5.93E-08 5.93E-08 5.93E-08 0.00E+00 5.93E-08 AINHL 2.81E-03 4.80E-03 4.80E-03 4.80E-03 4.80E-03 4.80E-03 0.00E+00 4.80E-03 AVEG 1.38E-01 3.53E-02 3.53E-02 3.53E-02 3.53E-02 3.53E-02 0.00E+00 3.53E-02 AGMILK 4.15E-03 6.11E-03 6.14E-03 6.11E-03 6.11E-03 6.11E-03 0.00E+00 6.11E-03 ACMEAT 5.14E-02 1.14E-02 1.14E-02 1.14E-02 1.14E-02 1.14E-02 0.00E+00 1.14E-02 ACMILK 5.60E-02 1.38E-02 1.38E-02 1.38E-02 1.38E-02 1.38E-02 0.00E+00 1.38E-02 TGPD 5.93E-08 5.93E-08 5.93E-08 5.93E-08 5.93E-08 5.93E-08 0.00E+00 5.93E-08 TINHL 4.01E-03 5.06E-03 5.06E-03 5.06E-03 5.06E-03 5.06E-03 0.00E+00 5.06E-03 TVEG 2.24E-01 5.37E-02 5.37E-02 5.37E-02 5.37E-02 5.37E-02 0.00E+00 5.37E-02 TGMILK 7.50E-03 8.37E-03 8.40E-03 8.37E-03 8.37E-03 8.37E-03 0.00E+00 8.37E-03 TCMEAT 4.34E-02 9.33E-03 9.33E-03 9.33E-03 9.33E-03 9.33E-03 0.00E+00 9.33E-03 TCMILK 1.03E-01 2.40E-02 2.41E-02 2.40E-02 2.40E-02 2.40E-02 0.00E+00 2.40E-02 CGPD 5.93E-08 5.93E-08 5.93E-08 5.93E-08 5.93E-08 5.93E-08 0.00E+00 5.93E-08 CINHL 5.54E-03 4.85E-03 4.85E-03 4.85E-03 4.85E-03 4.85E-03 0.00E+00 4.85E-03 CVEG 5.40E-01 1.22E-01 1.22E-01 1.22E-01 1.22E-01 1.22E-01 0.00E+00 1.22E-01 CGMILK 2.41E-01 6.16E-02 6.17E-02 6.16E-02 6.16E-02 6.16E-02 0.00E+00 6.16E-02 CCMEAT 8.16E-02 1.72E-02 1.72E-02 1.72E-02 1.72E-02 1.72E-02 0.00E+00 1.72E-02 CCMILK 2.55E-01 5.61E-02 5.62E-02 5.61E-02 5.61E-02 5.61E-02 0.00E+00 5.61E-02 IGPD 5.93E-08 5.93E-08 5.93E-08 5.93E-08 5.93E-08 5.93E-08 0.00E+00 5.93E-08 IINHL 4.09E-03 3.01E-03 3.01E-03 3.01E-03 3.01E-03 3.01E-03 0.00E+00 3.01E-03 IGMILK 4.98E-01 1.23E-01 1.23E-01 1.23E-01 1.23E-01 1.23E-01 0.00E+00 1.23E-01 ICMILK 4.98E-01 1.14E-01 1.15E-01 1.14E-01 1.14E-01 1.14E-01 0.00E+00 1.14E-01

PERIOD DOSE BY AGEGROUP, ORGAN (mrem) ===================================

Agegroup Bone Liver Thyroid Kidney Lung GI-Lli Skin TB ADULT 2.53E-01 7.14E-02 7.14E-02 7.14E-02 7.14E-02 7.14E-02 0.00E+00 7.14E-02 TEEN 3.82E-01 1.00E-01 1.01E-01 1.00E-01 1.00E-01 1.00E-01 0.00E+00 1.00E-01 CHILD 1.12E+00 2.62E-01 2.62E-01 2.62E-01 2.62E-01 2.62E-01 0.00E+00 2.62E-01 INFANT 1.00E+00 2.40E-01 2.41E-01 2.40E-01 2.40E-01 2.40E-01 0.00E+00 2.40E-01 E-1.12

Table 3.1-1 RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

REPORT - BY UNIT (Composite Critical Receptor - Limited Analysis)

Release ID...........: 1 All Gas Release Types Period Start Date....: 01/01/2015 00:00 Period End Date......: 01/01/2016 00:00 Period Duration (min): 5.256E+05 Coefficient Type.....: Historical Unit.................: 2 Receptor.............: 5 Composite Crit. Receptor - IP Distance (meters)....: 0.0 Compass Point........: 0.0

MAXIMUM PERIOD DOSE TO LIMIT (Any Organ) ================================

Dose Age Dose Limit Admin Admin % T.Spec T.Spec %

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End CHILD BONE 1.12E+00 31-day 2.25E-01 4.99E+02 3.00E-01 3.74E+02 Qrtr->End CHILD BONE 1.12E+00 Quarter 5.63E+00 2.00E+01 7.50E+00 1.50E+01 Year->End CHILD BONE 1.12E+00 Annual 1.13E+01 9.98E+00 1.50E+01 7.48E+00 Critical Pathway........: 2 Vegetation (VEG)

Major Contributors......: 0.0 % or greater to total Nuclide Percentage H-3 0.00E+00 C-14 9.98E+01 I-131 3.74E-05 I-132 5.68E-06 I-133 5.12E-08

MAXIMUM PERIOD DOSE TO LIMIT (Tot Body)) ================================

Dose Age Dose Limit Admin Admin % T.Spec T.Spec %

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End CHILD TBODY 2.62E-01 31-day 1.50E-01 1.74E+02 2.00E-01 1.31E+02 Qrtr->End CHILD TBODY 2.62E-01 Quarter 5.25E+00 4.98E+00 7.50E+00 3.49E+00 Year->End CHILD TBODY 2.62E-01 Annual 1.05E+01 2.49E+00 1.50E+01 1.74E+00 Critical Pathway........: 2 Vegetation (VEG)

Major Contributors......: 0.0 % or greater to total Nuclide Percentage H-3 1.32E+01 C-14 8.68E+01 I-131 9.22E-05 I-132 2.41E-05 I-133 1.09E-07 E-1.13

Table 3.1-1 RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

REPORT - BY UNIT (Composite Critical Receptor - Limited Analysis)

Release ID...........: 1 All Gas Release Types Period Start Date....: 01/01/2015 00:00 Period End Date......: 01/01/2016 00:00 Period Duration (min): 5.256E+05 Coefficient Type.....: Historical Unit.................: 2 Receptor.............: 4 Composite Crit. Receptor - NG Distance (meters)....: 0.0 Compass Point........: 0.0

MAXIMUM PERIOD NG DOSE TO LIMIT (Gamma) =================================

Dose Dose Limit Admin Admin % T.Spec T.Spec %

Period Dose Type (mrad) Period Limit of Limit Limit of Limit Strt->End Gamma 4.53E-07 31-day 1.50E-01 3.02E-04 2.00E-01 2.26E-04 Qrtr->End Gamma 4.53E-07 Quarter 3.75E+00 1.21E-05 5.00E+00 9.06E-06 Year->End Gamma 4.53E-07 Annual 7.50E+00 6.04E-06 1.00E+01 4.53E-06 Major Contributors......: 0.0 % or greater to total Nuclide Percentage AR-41 0.00E+00 KR-85M 0.00E+00 KR-87 0.00E+00 KR-89 0.00E+00 XE-131M 0.00E+00 XE-133 1.00E+02

MAXIMUM PERIOD NG DOSE TO LIMIT (Beta)) =================================

Dose Dose Limit Admin Admin % T.Spec T.Spec %

Period Dose Type (mrad) Period Limit of Limit Limit of Limit Strt->End Beta 2.20E-06 31-day 3.00E-01 7.32E-04 4.00E-01 5.49E-04 Qrtr->End Beta 2.20E-06 Quarter 7.50E+00 2.93E-05 1.00E+01 2.20E-05 Year->End Beta 2.20E-06 Annual 1.50E+01 1.46E-05 2.00E+01 1.10E-05 Major Contributors......: 0.0 % or greater to total Nuclide Percentage AR-41 0.00E+00 KR-85M 0.00E+00 KR-87 0.00E+00 KR-89 0.00E+00 XE-131M 0.00E+00 XE-133 1.00E+02 E-1.14

Table 3.2-1 RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT) ------

Release ID............: 1 All Liquid Release Types Period Start Date.....: 01/01/2015 00:00 Period End Date.......: 01/01/2016 00:00 Period Duration (mins): 5.256E+05 Unit..................: 1

MULTIPLE RELEASE POINT MESSAGE ==========================================

Undiluted and Diluted Flowrate(s) and Concentration(s) cannot be combined.

RELEASE DATA ===========================================================

Total Release Duration (minutes)..................................... 1.755E+06 Total Undiluted Volume Released (gallons)............................ NA Average Undiluted Flowrate (gpm)..................................... NA Total Dilution Volume (gallons)...................................... NA Average Dilution Flowrate (gpm)...................................... NA

NUCLIDE DATA ============================================================

Nuclide uCi BE-7 3.18E+01 CO-57 4.26E+00 NB-97 7.55E+02 SN-113 8.58E+00 SB-124 5.36E+02 SB-125 2.54E+04 BA-133 1.89E+00 TE-123M 3.94E+02 CR-51 4.58E+03 MN-54 1.99E+02 FE-59 4.20E+02 CO-58 5.66E+03 CO-60 6.02E+03 ZR-95 1.75E+02 NB-95 3.99E+02 AG-110M 3.28E+02 TE-125M 1.54E+04 TE-132 9.37E+01 I-132 4.17E+01 CS-136 1.62E+00 BA-139 8.57E+00 Gamma 6.04E+04 AR-41 1.89E+01 XE-133 9.68E+00 D&EG 2.86E+01 H-3 1.60E+09 E-1.15

Table 3.2-1 RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT) ------

Release ID............: 1 All Liquid Release Types Period Start Date.....: 01/01/2015 00:00 Period End Date.......: 01/01/2016 00:00 Period Duration (mins): 5.256E+05

NUCLIDE DATA ============================================================

Nuclide uCi FE-55 4.54E+03 NI-63 1.42E+03 Beta 1.60E+09 Total 1.60E+09 E-1.16

Table 3.2-1 RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT) ------

Release ID............: 1 All Liquid Release Types Period Start Date.....: 01/01/2015 00:00 Period End Date.......: 01/01/2016 00:00 Period Duration (mins): 5.256E+05 Unit..................: 1 Receptor..............: 0 Liquid Receptor

PERIOD DOSE BY AGEGROUP, PATHWAY, ORGAN (mrem) ==========================

Age/Path Bone Liver Thyroid Kidney Lung GI-Lli Skin TB APWtr 3.52E-05 1.93E-02 1.93E-02 1.93E-02 1.93E-02 1.94E-02 0.00E+00 1.93E-02 AFWFSp 2.46E-03 8.66E-03 8.33E-03 1.26E-02 8.03E-03 3.09E-02 0.00E+00 8.35E-03 TPWtr 3.37E-05 1.36E-02 1.36E-02 1.36E-02 1.36E-02 1.36E-02 0.00E+00 1.36E-02 TFWFSp 2.61E-03 6.85E-03 6.48E-03 6.19E-03 6.19E-03 2.28E-02 0.00E+00 6.51E-03 CPWtr 1.02E-04 2.61E-02 2.61E-02 2.61E-02 2.61E-02 2.61E-02 0.00E+00 2.61E-02 CFWFSp 3.39E-03 5.76E-03 5.53E-03 5.13E-03 5.13E-03 1.12E-02 0.00E+00 5.53E-03 IPWtr 8.84E-05 2.56E-02 2.56E-02 2.56E-02 2.56E-02 2.56E-02 0.00E+00 2.56E-02

PERIOD DOSE BY AGEGROUP, ORGAN (mrem) ===================================

Agegroup Bone Liver Thyroid Kidney Lung GI-Lli Skin TB ADULT 2.50E-03 2.80E-02 2.76E-02 3.19E-02 2.73E-02 5.03E-02 0.00E+00 2.76E-02 TEEN 2.64E-03 2.04E-02 2.01E-02 1.98E-02 1.98E-02 3.64E-02 0.00E+00 2.01E-02 CHILD 3.49E-03 3.19E-02 3.16E-02 3.12E-02 3.12E-02 3.74E-02 0.00E+00 3.16E-02 INFANT 8.84E-05 2.56E-02 2.56E-02 2.56E-02 2.56E-02 2.56E-02 0.00E+00 2.56E-02 E-1.17

Table 3.2-1 RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT) ------

Release ID............: 1 All Liquid Release Types Period Start Date.....: 01/01/2015 00:00 Period End Date.......: 01/01/2016 00:00 Period Duration (mins): 5.256E+05 Unit..................: 1 Receptor..............: 0 Liquid Receptor

MAXIMUM PERIOD DOSE TO LIMIT (Any Organ) ================================

Dose Age Dose Limit Admin Admin % T.Spec T.Spec %

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End ADULT GILLI 5.03E-02 31-day 1.50E-01 3.35E+01 2.00E-01 2.51E+01 Qrtr->End ADULT GILLI 5.03E-02 Quarter 3.75E+00 1.34E+00 5.00E+00 1.01E+00 Year->End ADULT GILLI 5.03E-02 Annual 7.50E+00 6.70E-01 1.00E+01 5.03E-01 Critical Pathway........: 1 Fresh Water Fish - Sport (FFSP)

Major Contributors......: 0.0 % or greater to total Nuclide Percentage H-3 5.43E+01 CR-51 8.28E-02 MN-54 1.50E-01 FE-55 6.76E-02 FE-59 1.95E-01 CO-58 5.97E-01 CO-60 1.69E+00 NI-63 3.66E-02 ZR-95 3.96E-03 NB-95 3.36E+01 AG-110M 1.18E-02 TE-125M 8.85E+00 TE-132 4.10E-01 I-132 9.77E-06 CS-136 1.27E-03 BA-139 1.22E-06

MAXIMUM PERIOD DOSE TO LIMIT (Tot Body)) ================================

Dose Age Dose Limit Admin Admin % T.Spec T.Spec %

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End CHILD TBODY 3.16E-02 31-day 4.50E-02 7.03E+01 6.00E-02 5.27E+01 Qrtr->End CHILD TBODY 3.16E-02 Quarter 1.13E+00 2.81E+00 1.50E+00 2.11E+00 Year->End CHILD TBODY 3.16E-02 Annual 2.25E+00 1.41E+00 3.00E+00 1.05E+00 Critical Pathway........: 0 Potable Water (PWtr)

Major Contributors......: 0.0 % or greater to total Nuclide Percentage H-3 9.86E+01 CR-51 5.81E-04 E-1.18

Table 3.2-1 RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT) ------

Release ID............: 1 All Liquid Release Types Period Start Date.....: 01/01/2015 00:00 Period End Date.......: 01/01/2016 00:00 Period Duration (mins): 5.256E+05 Major Contributors......: 0.0 % or greater to total Nuclide Percentage MN-54 1.61E-02 FE-55 6.29E-02 FE-59 4.08E-02 CO-58 1.19E-01 CO-60 3.57E-01 NI-63 1.90E-01 ZR-95 2.20E-06 NB-95 5.25E-03 AG-110M 4.61E-05 TE-125M 6.60E-01 TE-132 1.51E-02 I-132 3.86E-05 CS-136 9.51E-03 BA-139 6.19E-08 E-1.19

Table 3.2-1 RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT) ------

Release ID............: 1 All Liquid Release Types Period Start Date.....: 01/01/2015 00:00 Period End Date.......: 01/01/2016 00:00 Period Duration (mins): 5.256E+05 Unit..................: 2

MULTIPLE RELEASE POINT MESSAGE ==========================================

Undiluted and Diluted Flowrate(s) and Concentration(s) cannot be combined.

RELEASE DATA ===========================================================

Total Release Duration (minutes)..................................... 1.755E+06 Total Undiluted Volume Released (gallons)............................ NA Average Undiluted Flowrate (gpm)..................................... NA Total Dilution Volume (gallons)...................................... NA Average Dilution Flowrate (gpm)...................................... NA

NUCLIDE DATA ============================================================

Nuclide uCi BE-7 3.18E+01 CO-57 4.26E+00 NB-97 7.55E+02 SN-113 8.58E+00 SB-124 5.36E+02 SB-125 2.54E+04 BA-133 1.89E+00 TE-123M 3.94E+02 CR-51 4.58E+03 MN-54 1.99E+02 FE-59 4.20E+02 CO-58 5.66E+03 CO-60 6.02E+03 ZR-95 1.75E+02 NB-95 3.99E+02 AG-110M 3.28E+02 TE-125M 1.54E+04 TE-132 9.37E+01 I-132 4.17E+01 CS-136 1.62E+00 BA-139 8.57E+00 Gamma 6.04E+04 AR-41 1.89E+01 XE-133 9.68E+00 D&EG 2.86E+01 H-3 1.60E+09 E-1.20

Table 3.2-1 RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT) ------

Release ID............: 1 All Liquid Release Types Period Start Date.....: 01/01/2015 00:00 Period End Date.......: 01/01/2016 00:00 Period Duration (mins): 5.256E+05

NUCLIDE DATA ============================================================

Nuclide uCi FE-55 4.54E+03 NI-63 1.42E+03 Beta 1.60E+09 Total 1.60E+09 E-1.21

Table 3.2-1 RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT) ------

Release ID............: 1 All Liquid Release Types Period Start Date.....: 01/01/2015 00:00 Period End Date.......: 01/01/2016 00:00 Period Duration (mins): 5.256E+05 Unit..................: 2 Receptor..............: 0 Liquid Receptor

PERIOD DOSE BY AGEGROUP, PATHWAY, ORGAN (mrem) ==========================

Age/Path Bone Liver Thyroid Kidney Lung GI-Lli Skin TB APWtr 3.52E-05 1.93E-02 1.93E-02 1.93E-02 1.93E-02 1.94E-02 0.00E+00 1.93E-02 AFWFSp 2.46E-03 8.66E-03 8.33E-03 1.26E-02 8.03E-03 3.09E-02 0.00E+00 8.35E-03 TPWtr 3.37E-05 1.36E-02 1.36E-02 1.36E-02 1.36E-02 1.36E-02 0.00E+00 1.36E-02 TFWFSp 2.61E-03 6.85E-03 6.48E-03 6.19E-03 6.19E-03 2.28E-02 0.00E+00 6.51E-03 CPWtr 1.02E-04 2.61E-02 2.61E-02 2.61E-02 2.61E-02 2.61E-02 0.00E+00 2.61E-02 CFWFSp 3.39E-03 5.76E-03 5.53E-03 5.13E-03 5.13E-03 1.12E-02 0.00E+00 5.53E-03 IPWtr 8.84E-05 2.56E-02 2.56E-02 2.56E-02 2.56E-02 2.56E-02 0.00E+00 2.56E-02

PERIOD DOSE BY AGEGROUP, ORGAN (mrem) ===================================

Agegroup Bone Liver Thyroid Kidney Lung GI-Lli Skin TB ADULT 2.50E-03 2.80E-02 2.76E-02 3.19E-02 2.73E-02 5.03E-02 0.00E+00 2.76E-02 TEEN 2.64E-03 2.04E-02 2.01E-02 1.98E-02 1.98E-02 3.64E-02 0.00E+00 2.01E-02 CHILD 3.49E-03 3.19E-02 3.16E-02 3.12E-02 3.12E-02 3.74E-02 0.00E+00 3.16E-02 INFANT 8.84E-05 2.56E-02 2.56E-02 2.56E-02 2.56E-02 2.56E-02 0.00E+00 2.56E-02 E-1.22

Table 3.2-1 RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT) ------

Release ID............: 1 All Liquid Release Types Period Start Date.....: 01/01/2015 00:00 Period End Date.......: 01/01/2016 00:00 Period Duration (mins): 5.256E+05 Unit..................: 2 Receptor..............: 0 Liquid Receptor

MAXIMUM PERIOD DOSE TO LIMIT (Any Organ) ================================

Dose Age Dose Limit Admin Admin % T.Spec T.Spec %

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End ADULT GILLI 5.03E-02 31-day 1.50E-01 3.35E+01 2.00E-01 2.51E+01 Qrtr->End ADULT GILLI 5.03E-02 Quarter 3.75E+00 1.34E+00 5.00E+00 1.01E+00 Year->End ADULT GILLI 5.03E-02 Annual 7.50E+00 6.70E-01 1.00E+01 5.03E-01 Critical Pathway........: 1 Fresh Water Fish - Sport (FFSP)

Major Contributors......: 0.0 % or greater to total Nuclide Percentage H-3 5.43E+01 CR-51 8.28E-02 MN-54 1.50E-01 FE-55 6.76E-02 FE-59 1.95E-01 CO-58 5.97E-01 CO-60 1.69E+00 NI-63 3.66E-02 ZR-95 3.96E-03 NB-95 3.36E+01 AG-110M 1.18E-02 TE-125M 8.85E+00 TE-132 4.10E-01 I-132 9.77E-06 CS-136 1.27E-03 BA-139 1.22E-06

MAXIMUM PERIOD DOSE TO LIMIT (Tot Body)) ================================

Dose Age Dose Limit Admin Admin % T.Spec T.Spec %

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End CHILD TBODY 3.16E-02 31-day 4.50E-02 7.03E+01 6.00E-02 5.27E+01 Qrtr->End CHILD TBODY 3.16E-02 Quarter 1.13E+00 2.81E+00 1.50E+00 2.11E+00 Year->End CHILD TBODY 3.16E-02 Annual 2.25E+00 1.41E+00 3.00E+00 1.05E+00 Critical Pathway........: 0 Potable Water (PWtr)

Major Contributors......: 0.0 % or greater to total Nuclide Percentage H-3 9.86E+01 CR-51 5.81E-04 E-1.23

Table 3.2-1 RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT) ------

Release ID............: 1 All Liquid Release Types Period Start Date.....: 01/01/2015 00:00 Period End Date.......: 01/01/2016 00:00 Period Duration (mins): 5.256E+05 Major Contributors......: 0.0 % or greater to total Nuclide Percentage MN-54 1.61E-02 FE-55 6.29E-02 FE-59 4.08E-02 CO-58 1.19E-01 CO-60 3.57E-01 NI-63 1.90E-01 ZR-95 2.20E-06 NB-95 5.25E-03 AG-110M 4.61E-05 TE-125M 6.60E-01 TE-132 1.51E-02 I-132 3.86E-05 CS-136 9.51E-03 BA-139 6.19E-08 E-1.24

Table 3-3.1 Braidwood Nuclear Station Unit 1 10 CFR 20 Compliance Assessment Period of Assessment: 1/1/15 through 12/31/15 Calculated: 04/19/16 10 CFR 20.1301(a)(1) Compliance Total Effective Dose Equivalent (TEDE) mrem/year 1.14E+00 10 CFR 20.1301(a)(1) limit mrem/year 100.00

% of limit 1.14%

Compliance Summary 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Total TEDE (mrem) 2.61E-01 2.97E-01 2.97E-01 2.88E-01 1.14E+00 E-1-25

Table 3-3.1 (cont.)

Braidwood Nuclear Station Unit 2 10 CFR 20 Compliance Assessment Period of Assessment: 1/1/15 through 12/31/15 Calculated: 04/19/16 10 CFR 20.1301(a)(1) Compliance Total Effective Dose Equivalent (TEDE) mrem/year 1.17E+00 10 CFR 20.1301(a)(1) limit mrem/year 100.00

% of limit 1.17%

Compliance Summary 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Total TEDE (mrem) 2.71E-01 3.16E-01 3.23E-01 2.65E-01 1.17E+00 E-1-26

Table 3.4-1 The following are the maximum annual calculated cumulative offsite doses resulting from Braidwood Station airborne releases in 2015 based on concurrent meteorological data:

Unit 1:

Dose Maximum Value Sector Affected (1) -6 gamma air 3.870 x10 mrad North (2) -6 beta air 3.700 x10 mrad North (3) -1 whole body 3.070 x10 mrem North (4) -6 skin 4.640 x 10 mrem North (5) +0 organ (child-bone) 1.390 x10 mrem North Unit 1 Compliance Status 10 CFR 50 Appendix I Yearly Objective % of Appendix I gamma air 10.0 mrad 0.00E+00 beta air 20.0 mrad 0.00E+00 whole body 5.0 mrem 6.14E+00 skin 15.0 mrem 0.00E+00 organ 15.0 mrem 9.27E+00 Unit 2:

Dose Maximum Value Sector Affected (1) -7 gamma air 8.910 x10 mrad North (2) -6 beta air 2.650 x10 mrad North (3) -1 whole body 3.130 x10 mrem North (4) -6 skin 1.460 x10 mrem North (5) +0 organ (child-bone) 1.360 x10 mrem North Unit 2 Compliance Status 10 CFR 50 Appendix I Yearly Objective % of Appendix I gamma air 10.0 mrad 0.00E+00 beta air 20.0 mrad 0.00E+00 whole body 5.0 mrem 6.26E+00 skin 15.0 mrem 0.00E+00 organ 15.0 mrem 9.07E+00 (1) Gamma Air Dose - GASPAR II, NUREG-0597 (2) Beta Air Dose - GASPAR II, NUREG-0597 (3) Whole Body Dose - GASPAR II, NUREG-0597 (4) Skin Dose - GASPAR II, NUREG-0597 (5) Inhalation and Food Pathways Dose - GASPAR II, NUREG-0597 E-1.27

Intentionally left blank APPENDIX F METEOROLOGICAL DATA

Intentionally left blank Braidwood Generating Station Period of Record: January - March 2015 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 1 0 0 1 NNE 0 0 4 0 0 0 4 NE 0 0 0 0 0 0 0 ENE 0 1 4 0 0 0 5 E 0 0 1 0 0 0 1 ESE 0 2 3 0 0 0 5 SE 0 0 4 0 0 0 4 SSE 0 0 0 1 0 0 1 S 0 0 0 4 0 0 4 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 2 0 0 2 W 0 0 5 0 0 0 5 WNW 0 4 10 0 0 0 14 NW 0 5 24 0 0 0 29 NNW 0 0 14 2 3 0 19 Variable 0 0 0 0 0 0 0 Total 0 12 69 10 3 0 94 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 F-1

Braidwood Generating Station Period of Record: January - March 2015 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 2 0 0 0 2 NNE 0 0 1 0 0 0 1 NE 0 3 5 0 0 0 8 ENE 0 5 0 0 0 0 5 E 0 4 1 0 0 0 5 ESE 0 2 1 0 0 0 3 SE 0 1 1 0 0 0 2 SSE 0 0 2 0 0 0 2 S 0 0 0 1 0 0 1 SSW 0 0 2 0 0 0 2 SW 0 0 0 1 0 0 1 WSW 0 0 1 4 0 0 5 W 0 1 3 0 0 0 4 WNW 0 3 2 2 0 0 7 NW 0 4 5 0 0 0 9 NNW 0 3 6 2 2 0 13 Variable 0 0 0 0 0 0 0 Total 0 26 32 10 2 0 70 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 4 F-2

Braidwood Generating Station Period of Record: January - March 2015 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 1 0 0 0 1 NNE 0 0 1 1 0 0 2 NE 0 4 0 0 0 0 4 ENE 0 2 0 0 0 0 2 E 0 1 1 0 0 0 2 ESE 0 4 1 0 0 0 5 SE 0 3 0 0 0 0 3 SSE 0 1 2 0 0 0 3 S 0 2 0 2 0 0 4 SSW 0 1 2 3 0 0 6 SW 0 1 3 2 0 0 6 WSW 0 1 0 1 0 0 2 W 0 6 4 0 0 0 10 WNW 0 2 5 0 0 0 7 NW 0 2 6 0 0 0 8 NNW 0 1 6 3 0 0 10 Variable 0 0 0 0 0 0 0 Total 0 31 32 12 0 0 75 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 F-3

Braidwood Generating Station Period of Record: January - March 2015 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 10 9 38 0 0 0 57 NNE 6 8 24 17 0 0 55 NE 13 20 11 1 0 0 45 ENE 21 29 6 0 0 0 56 E 7 13 0 0 0 0 20 ESE 4 17 2 0 0 0 23 SE 2 19 8 0 0 0 29 SSE 5 20 13 4 0 0 42 S 2 14 17 12 3 0 48 SSW 4 12 38 26 3 1 84 SW 2 27 59 12 0 0 100 WSW 2 23 21 3 0 0 49 W 9 36 27 3 0 0 75 WNW 8 24 42 6 0 0 80 NW 8 16 22 2 0 0 48 NNW 6 16 36 10 1 0 69 Variable 1 0 0 0 0 0 1 Total 110 303 364 96 7 1 881 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: 4 F-4

Braidwood Generating Station Period of Record: January - March 2015 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 10 13 4 0 0 0 27 NNE 4 3 0 2 0 0 9 NE 12 9 4 1 0 0 26 ENE 11 20 0 0 0 0 31 E 27 5 0 0 0 0 32 ESE 7 34 2 0 0 0 43 SE 7 19 5 0 0 0 31 SSE 3 31 14 4 0 0 52 S 0 25 32 9 0 0 66 SSW 0 10 40 6 0 0 56 SW 2 20 44 7 0 0 73 WSW 6 37 17 0 0 0 60 W 21 36 19 0 0 0 76 WNW 14 40 9 0 0 0 63 NW 29 34 10 1 0 0 74 NNW 9 35 6 0 0 0 50 Variable 0 0 0 0 0 0 0 Total 162 371 206 30 0 0 769 Hours of calm in this stability class: 7 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 F-5

Braidwood Generating Station Period of Record: January - March 2015 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 2 1 0 0 0 0 3 NNE 3 0 0 0 0 0 3 NE 1 0 0 0 0 0 1 ENE 6 0 0 0 0 0 6 E 20 0 0 0 0 0 20 ESE 6 1 0 0 0 0 7 SE 1 1 0 0 0 0 2 SSE 2 0 0 0 0 0 2 S 1 0 0 0 0 0 1 SSW 2 3 1 0 0 0 6 SW 3 5 4 0 0 0 12 WSW 13 23 1 0 0 0 37 W 13 25 0 0 0 0 38 WNW 18 5 0 0 0 0 23 NW 9 2 0 0 0 0 11 NNW 3 0 1 0 0 0 4 Variable 1 0 0 0 0 0 1 Total 104 66 7 0 0 0 177 Hours of calm in this stability class: 8 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 F-6

Braidwood Generating Station Period of Record: January - March 2015 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 1 0 0 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 5 0 0 0 0 0 5 E 7 0 0 0 0 0 7 ESE 1 0 0 0 0 0 1 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 1 0 0 0 0 0 1 SSW 0 0 1 0 0 0 1 SW 1 3 0 0 0 0 4 WSW 3 4 0 0 0 0 7 W 6 3 0 0 0 0 9 WNW 6 0 0 0 0 0 6 NW 3 0 0 0 0 0 3 NNW 2 0 0 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 37 10 1 0 0 0 48 Hours of calm in this stability class: 23 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 F-7

Braidwood Generating Station Period of Record: January - March 2015 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 1 0 0 1 NNE 0 0 0 5 0 0 5 NE 0 0 0 0 0 0 0 ENE 0 0 1 2 0 0 3 E 0 1 2 1 0 0 4 ESE 0 0 0 2 1 0 3 SE 0 0 1 3 1 0 5 SSE 0 0 0 0 0 0 0 S 0 0 0 0 4 0 4 SSW 0 0 0 0 1 0 1 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 2 0 2 W 0 0 2 3 0 0 5 WNW 0 0 3 4 4 0 11 NW 0 1 7 21 3 0 32 NNW 0 0 4 9 2 3 18 Variable 0 0 0 0 0 0 0 Total 0 2 20 51 18 3 94 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 F-8

Braidwood Generating Station Period of Record: January - March 2015 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 2 1 0 0 3 NNE 0 0 0 0 0 0 0 NE 0 1 2 3 0 0 6 ENE 0 3 1 2 0 0 6 E 0 1 2 1 0 0 4 ESE 0 1 0 1 0 0 2 SE 0 0 4 1 0 0 5 SSE 0 0 0 2 0 0 2 S 0 0 0 0 0 0 0 SSW 0 0 2 0 1 0 3 SW 0 0 0 0 1 0 1 WSW 0 1 0 2 3 0 6 W 0 1 0 2 0 0 3 WNW 0 0 4 0 3 0 7 NW 0 1 2 6 2 0 11 NNW 0 1 5 2 2 2 12 Variable 0 0 0 0 0 0 0 Total 0 10 24 23 12 2 71 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 F-9

Braidwood Generating Station Period of Record: January - March 2015 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 1 0 2 NE 0 1 0 0 0 0 1 ENE 0 3 1 0 0 0 4 E 0 1 1 1 0 0 3 ESE 0 1 2 1 0 0 4 SE 0 2 2 0 0 0 4 SSE 0 0 0 2 0 0 2 S 0 1 1 0 0 0 2 SSW 0 0 2 0 2 1 5 SW 0 0 0 6 1 0 7 WSW 0 3 0 1 0 0 4 W 0 1 5 0 1 0 7 WNW 0 3 2 0 4 0 9 NW 0 1 1 8 0 0 10 NNW 0 0 2 5 2 1 10 Variable 0 0 0 0 0 0 0 Total 0 17 21 24 11 2 75 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 F-10

Braidwood Generating Station Period of Record: January - March 2015 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 3 7 16 20 1 0 47 NNE 1 8 10 24 11 3 57 NE 4 11 10 9 6 0 40 ENE 5 20 12 10 0 0 47 E 2 19 12 4 0 0 37 ESE 0 6 9 6 0 0 21 SE 2 11 13 8 2 0 36 SSE 2 9 8 7 6 0 32 S 3 7 19 8 9 4 50 SSW 3 5 7 34 13 11 73 SW 4 10 36 38 9 3 100 WSW 0 6 39 18 2 0 65 W 2 25 7 19 6 0 59 WNW 4 12 17 31 18 3 85 NW 3 7 8 25 13 2 58 NNW 2 11 18 32 10 2 75 Variable 1 0 0 0 0 0 1 Total 41 174 241 293 106 28 883 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: 4 F-11

Braidwood Generating Station Period of Record: January - March 2015 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 12 18 4 0 0 35 NNE 2 11 4 0 0 1 18 NE 0 4 5 1 3 0 13 ENE 2 4 14 4 0 0 24 E 6 9 14 0 0 0 29 ESE 0 6 19 7 3 0 35 SE 2 5 34 6 2 0 49 SSE 0 12 14 6 6 0 38 S 0 3 22 29 11 0 65 SSW 0 1 15 41 16 1 74 SW 1 4 24 37 6 1 73 WSW 3 10 16 29 0 0 58 W 2 7 16 24 2 0 51 WNW 0 13 22 28 2 0 65 NW 1 15 25 36 6 0 83 NNW 2 16 29 17 0 0 64 Variable 0 0 0 0 0 0 0 Total 22 132 291 269 57 3 774 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 F-12

Braidwood Generating Station Period of Record: January - March 2015 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 2 2 1 0 0 5 NNE 0 0 2 1 0 0 3 NE 1 1 0 0 0 0 2 ENE 1 1 2 0 0 0 4 E 2 1 3 0 0 0 6 ESE 1 2 9 4 0 0 16 SE 1 6 4 0 0 0 11 SSE 0 2 0 0 0 0 2 S 0 3 0 0 0 0 3 SSW 0 0 1 0 0 0 1 SW 0 7 3 3 1 0 14 WSW 0 4 11 0 0 0 15 W 0 5 17 18 1 0 41 WNW 0 3 8 17 0 0 28 NW 1 3 18 4 0 0 26 NNW 0 0 5 2 0 0 7 Variable 1 0 0 0 0 0 1 Total 8 40 85 50 2 0 185 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 F-13

Braidwood Generating Station Period of Record: January - March 2015 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 1 0 0 0 0 1 NNE 0 2 0 0 0 0 2 NE 0 1 0 0 0 0 1 ENE 1 0 0 0 0 0 1 E 3 0 2 0 0 0 5 ESE 1 0 0 2 0 0 3 SE 2 3 1 0 0 0 6 SSE 1 1 0 0 0 0 2 S 0 4 0 0 0 0 4 SSW 3 1 2 0 0 0 6 SW 1 5 2 0 0 0 8 WSW 1 0 1 3 0 0 5 W 2 1 1 4 0 0 8 WNW 1 0 3 3 0 0 7 NW 2 2 4 0 0 0 8 NNW 0 2 1 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 18 23 17 12 0 0 70 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: 4 F-14

Braidwood Generating Station Period of Record: April - June 2015 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 0 4 0 0 0 5 NNE 0 3 7 0 0 0 10 NE 0 10 10 0 0 0 20 ENE 0 7 0 0 0 0 7 E 0 3 2 0 0 0 5 ESE 0 5 2 0 0 0 7 SE 0 5 3 0 0 0 8 SSE 0 9 0 0 0 0 9 S 0 4 5 1 0 0 10 SSW 0 3 13 7 0 0 23 SW 0 0 2 3 0 0 5 WSW 0 0 13 5 1 0 19 W 2 1 9 7 2 0 21 WNW 2 3 11 2 0 0 18 NW 4 4 15 1 0 0 24 NNW 1 1 2 1 0 0 5 Variable 0 0 0 0 0 0 0 Total 10 58 98 27 3 0 196 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability classes: 0 F-15

Braidwood Generating Station Period of Record: April - June 2015 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 3 2 0 0 0 5 NNE 0 7 8 0 0 0 15 NE 0 12 5 0 0 0 17 ENE 0 7 0 0 0 0 7 E 0 0 2 0 0 0 2 ESE 0 1 0 0 0 0 1 SE 0 3 2 0 0 0 5 SSE 0 3 0 0 0 0 3 S 0 3 4 2 0 0 9 SSW 0 3 3 4 0 0 10 SW 2 3 8 5 0 0 18 WSW 0 4 4 1 1 0 10 W 1 3 2 2 1 0 9 WNW 1 2 3 0 1 0 7 NW 1 1 4 0 0 0 6 NNW 1 1 3 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 6 56 50 14 3 0 129 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: 0 F-16

Braidwood Generating Station Period of Record: April - June 2015 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 4 0 0 0 0 4 NNE 1 2 7 0 0 0 10 NE 1 12 5 0 0 0 18 ENE 0 5 2 0 0 0 7 E 0 0 0 0 0 0 0 ESE 0 2 0 0 0 0 2 SE 0 3 3 0 0 0 6 SSE 0 8 2 0 0 0 10 S 0 1 1 1 0 0 3 SSW 0 3 4 2 1 0 10 SW 2 3 11 1 0 0 17 WSW 1 5 5 0 0 0 11 W 2 2 1 2 0 0 7 WNW 2 1 2 0 0 0 5 NW 2 0 2 0 0 0 4 NNW 1 5 1 0 0 0 7 Variable 0 0 0 0 0 0 0 Total 12 56 46 6 1 0 121 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 0 F-17

Braidwood Generating Station Period of Record: April - June 2015 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 8 13 1 0 0 0 22 NNE 15 41 27 12 0 0 95 NE 23 87 31 0 0 0 141 ENE 19 44 15 0 0 0 78 E 5 10 2 0 0 0 17 ESE 4 10 3 0 0 0 17 SE 2 16 5 0 0 0 23 SSE 1 22 16 1 0 0 40 S 3 13 19 12 0 0 47 SSW 4 13 27 17 6 0 67 SW 4 24 42 12 2 0 84 WSW 10 11 15 5 2 0 43 W 6 7 13 18 4 0 48 WNW 12 9 9 3 0 0 33 NW 4 13 3 0 0 0 20 NNW 6 11 4 0 0 0 21 Variable 3 0 0 0 0 0 3 Total 129 344 232 80 14 0 799 Hours of calm in this stability class: 3 Hours of missing wind measurements in this stability class: 16 Hours of missing stability measurements in all stability classes: 0 F-18

Braidwood Generating Station Period of Record: April - June 2015 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 14 11 1 0 0 0 26 NNE 9 25 1 0 0 0 35 NE 8 22 1 0 0 0 31 ENE 23 29 1 0 0 0 53 E 14 21 0 0 0 0 35 ESE 14 14 2 0 0 0 30 SE 10 21 0 0 0 0 31 SSE 10 42 16 1 0 0 69 S 5 34 53 6 1 0 99 SSW 4 10 42 14 0 0 70 SW 4 22 34 2 0 0 62 WSW 2 15 12 1 1 0 31 W 10 6 4 2 0 0 22 WNW 7 10 6 1 1 0 25 NW 8 8 2 0 0 0 18 NNW 5 8 1 0 0 0 14 Variable 0 0 0 0 0 0 0 Total 147 298 176 27 3 0 651 Hours of calm in this stability class: 10 Hours of missing wind measurements in this stability class: 13 Hours of missing stability measurements in all stability classes: 0 F-19

Braidwood Generating Station Period of Record: April - June 2015 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 6 2 0 0 0 0 8 NNE 1 0 0 0 0 0 1 NE 1 1 0 0 0 0 2 ENE 11 2 0 0 0 0 13 E 8 1 0 0 0 0 9 ESE 13 4 0 0 0 0 17 SE 2 4 0 0 0 0 6 SSE 1 8 1 0 0 0 10 S 1 2 2 0 0 0 5 SSW 7 2 1 0 0 0 10 SW 2 2 0 0 0 0 4 WSW 4 7 0 0 0 0 11 W 20 2 0 0 0 0 22 WNW 7 1 0 0 0 0 8 NW 3 0 0 0 0 0 3 NNW 5 1 0 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 92 39 4 0 0 0 135 Hours of calm in this stability class: 24 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 0 F-20

Braidwood Generating Station Period of Record: April - June 2015 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 2 0 0 0 0 0 2 NNE 1 0 0 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 2 0 0 0 0 0 2 E 2 1 0 0 0 0 3 ESE 2 1 0 0 0 0 3 SE 0 0 0 0 0 0 0 SSE 2 0 0 0 0 0 2 S 0 0 0 0 0 0 0 SSW 1 0 0 0 0 0 1 SW 0 0 0 0 0 0 0 WSW 8 0 0 0 0 0 8 W 4 0 0 0 0 0 4 WNW 3 0 0 0 0 0 3 NW 7 0 0 0 0 0 7 NNW 2 0 0 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 36 2 0 0 0 0 38 Hours of calm in this stability class: 41 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-21

Braidwood Generating Station Period of Record: April - June 2015 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 3 0 0 3 NNE 0 0 1 6 0 0 7 NE 0 4 4 12 0 0 20 ENE 0 1 5 0 0 0 6 E 0 3 5 0 1 0 9 ESE 0 4 1 1 2 0 8 SE 0 1 4 4 0 0 9 SSE 0 5 2 0 0 0 7 S 0 1 5 2 0 0 8 SSW 0 0 11 6 6 0 23 SW 0 0 2 1 5 0 8 WSW 0 0 3 7 1 1 12 W 0 1 3 9 8 5 26 WNW 0 0 5 7 7 2 21 NW 0 0 7 13 3 0 23 NNW 0 0 2 2 0 0 4 Variable 0 0 0 0 0 0 0 Total 0 20 60 73 33 8 194 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: 0 F-22

Braidwood Generating Station Period of Record: April - June 2015 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 3 2 0 0 0 5 NNE 0 2 7 3 0 0 12 NE 0 2 8 5 1 0 16 ENE 0 5 6 0 0 0 11 E 0 0 0 1 1 0 2 ESE 0 0 0 0 0 0 0 SE 0 3 1 2 0 0 6 SSE 0 2 1 0 0 0 3 S 0 2 2 1 2 0 7 SSW 0 0 5 2 3 0 10 SW 0 3 6 5 1 0 15 WSW 0 1 4 7 1 0 13 W 0 2 2 2 1 3 10 WNW 0 1 1 3 2 0 7 NW 0 1 2 3 2 0 8 NNW 0 1 1 1 0 0 3 Variable 0 0 0 0 0 0 0 Total 0 28 48 35 14 3 128 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability classes: 0 F-23

Braidwood Generating Station Period of Record: April - June 2015 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 2 1 1 0 0 4 NNE 2 1 1 2 0 0 6 NE 0 2 11 7 0 0 20 ENE 0 2 4 1 0 0 7 E 0 3 0 0 0 0 3 ESE 0 2 0 0 0 0 2 SE 0 2 1 3 0 0 6 SSE 0 5 4 0 1 0 10 S 0 0 2 1 1 0 4 SSW 0 0 3 4 0 2 9 SW 0 0 6 3 1 0 10 WSW 1 1 9 6 0 0 17 W 0 3 2 1 1 1 8 WNW 0 1 1 2 0 0 4 NW 1 0 0 4 0 0 5 NNW 0 4 3 0 0 0 7 Variable 0 0 0 0 0 0 0 Total 4 28 48 35 4 3 122 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 0 F-24

Braidwood Generating Station Period of Record: April - June 2015 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 0 12 3 1 0 0 16 NNE 2 10 11 16 11 1 51 NE 3 29 81 35 0 0 148 ENE 2 34 48 24 1 0 109 E 1 15 13 6 1 0 36 ESE 0 5 4 8 1 0 18 SE 0 6 7 6 0 0 19 SSE 1 5 12 16 3 1 38 S 1 5 14 15 2 5 42 SSW 0 6 12 13 13 10 54 SW 1 10 33 31 11 7 93 WSW 3 10 18 8 4 1 44 W 0 7 5 11 14 17 54 WNW 3 8 12 9 8 1 41 NW 1 3 8 9 2 0 23 NNW 1 13 6 3 0 0 23 Variable 2 1 0 0 0 0 3 Total 21 179 287 211 71 43 812 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 6 Hours of missing stability measurements in all stability classes: 0 F-25

Braidwood Generating Station Period of Record: April - June 2015 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 2 16 4 0 0 22 NNE 2 4 18 7 0 0 31 NE 1 5 20 4 0 0 30 ENE 1 12 27 5 0 0 45 E 1 9 28 5 0 0 43 ESE 0 4 14 11 3 0 32 SE 0 5 18 5 0 0 28 SSE 0 6 17 24 4 0 51 S 0 4 29 40 22 4 99 SSW 0 4 10 37 16 3 70 SW 1 4 17 42 14 0 78 WSW 0 6 19 16 1 0 42 W 4 4 10 8 5 1 32 WNW 1 1 10 6 4 1 23 NW 0 7 8 6 1 1 23 NNW 0 2 9 4 0 0 15 Variable 0 0 0 0 0 0 0 Total 11 79 270 224 70 10 664 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 10 Hours of missing stability measurements in all stability classes: 0 F-26

Braidwood Generating Station Period of Record: April - June 2015 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 6 1 0 0 8 NNE 0 1 4 0 0 0 5 NE 0 1 1 0 0 0 2 ENE 1 4 4 1 0 0 10 E 2 1 4 1 0 0 8 ESE 0 0 7 3 0 0 10 SE 0 0 8 7 0 0 15 SSE 1 1 1 6 0 0 9 S 0 5 2 5 0 0 12 SSW 1 3 5 0 1 0 10 SW 1 1 3 2 0 0 7 WSW 0 1 3 0 0 0 4 W 1 4 7 3 0 0 15 WNW 0 2 12 2 0 0 16 NW 1 2 7 1 0 0 11 NNW 0 1 5 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 8 28 79 32 1 0 148 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 11 Hours of missing stability measurements in all stability classes: 0 F-27

Braidwood Generating Station Period of Record: April - June 2015 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 5 4 0 0 0 9 NNE 0 3 1 0 0 0 4 NE 0 2 5 0 0 0 7 ENE 0 0 0 0 0 0 0 E 0 2 1 0 0 0 3 ESE 0 1 0 0 0 0 1 SE 0 2 1 0 0 0 3 SSE 0 2 3 0 0 0 5 S 0 2 0 0 0 0 2 SSW 1 3 0 0 0 0 4 SW 1 3 0 0 0 0 4 WSW 4 2 3 2 0 0 11 W 1 2 8 1 0 0 12 WNW 1 2 1 0 0 0 4 NW 0 0 2 0 0 0 2 NNW 0 2 5 0 0 0 7 Variable 0 0 0 0 0 0 0 Total 8 33 34 3 0 0 78 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 0 F-28

Braidwood Generating Station Period of Record: July - September 2015 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 2 1 0 0 0 3 NNE 0 1 0 1 0 0 2 NE 1 3 3 1 0 0 8 ENE 2 8 0 0 0 0 10 E 3 14 0 0 0 0 17 ESE 1 6 0 0 0 0 7 SE 3 5 0 0 0 0 8 SSE 6 12 5 0 0 0 23 S 3 10 19 2 0 0 34 SSW 2 7 13 3 0 0 25 SW 3 3 17 5 0 0 28 WSW 2 7 18 0 0 0 27 W 1 12 16 13 0 0 42 WNW 0 16 11 0 0 0 27 NW 2 11 5 0 0 0 18 NNW 1 8 8 0 0 0 17 Variable 0 0 0 0 0 0 0 Total 30 125 116 25 0 0 296 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 F-29

Braidwood Generating Station Period of Record: July - September 2015 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 2 5 0 0 0 7 NNE 1 2 0 1 0 0 4 NE 5 12 2 1 0 0 20 ENE 3 5 0 0 0 0 8 E 3 6 0 0 0 0 9 ESE 6 3 0 0 0 0 9 SE 2 5 0 0 0 0 7 SSE 8 3 2 0 0 0 13 S 4 7 4 0 0 0 15 SSW 1 3 4 2 0 0 10 SW 0 2 0 1 0 0 3 WSW 3 13 4 0 0 0 20 W 2 6 2 1 0 0 11 WNW 1 5 5 0 0 0 11 NW 0 3 1 0 0 0 4 NNW 1 5 2 0 0 0 8 Variable 0 0 0 0 0 0 0 Total 40 82 31 6 0 0 159 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 F-30

Braidwood Generating Station Period of Record: July - September 2015 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 1 5 1 0 0 0 7 NNE 4 4 0 0 0 0 8 NE 8 4 2 0 0 0 14 ENE 1 4 0 0 0 0 5 E 3 5 0 0 0 0 8 ESE 1 4 0 0 0 0 5 SE 2 4 0 0 0 0 6 SSE 2 1 0 0 0 0 3 S 1 4 6 0 0 0 11 SSW 1 4 3 2 0 0 10 SW 0 5 4 2 0 0 11 WSW 0 7 1 1 0 0 9 W 1 8 2 0 0 0 11 WNW 0 1 0 0 0 0 1 NW 0 4 0 0 0 0 4 NNW 0 5 0 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 25 69 19 5 0 0 118 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 F-31

Braidwood Generating Station Period of Record: July - September 2015 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 13 17 3 0 0 0 33 NNE 17 16 15 5 0 0 53 NE 26 17 4 1 0 0 48 ENE 27 11 1 0 0 0 39 E 13 10 0 0 0 0 23 ESE 8 8 0 0 0 0 16 SE 16 21 2 0 0 0 39 SSE 20 17 1 0 0 0 38 S 5 14 19 4 0 0 42 SSW 2 19 17 0 0 0 38 SW 2 18 18 5 0 0 43 WSW 2 15 10 1 0 0 28 W 7 16 4 0 0 0 27 WNW 6 4 4 0 0 0 14 NW 6 8 6 0 0 0 20 NNW 8 13 5 0 0 0 26 Variable 0 0 0 0 0 0 0 Total 178 224 109 16 0 0 527 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 F-32

Braidwood Generating Station Period of Record: July - September 2015 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 15 0 0 0 0 24 NNE 10 13 2 0 0 0 25 NE 11 9 0 0 0 0 20 ENE 47 18 1 0 0 0 66 E 45 4 0 0 0 0 49 ESE 25 8 0 0 0 0 33 SE 16 32 1 0 0 0 49 SSE 25 56 5 0 0 0 86 S 14 64 25 1 0 0 104 SSW 5 40 25 0 0 0 70 SW 5 30 16 0 0 0 51 WSW 9 30 1 0 0 0 40 W 14 11 2 0 0 0 27 WNW 17 7 0 0 0 0 24 NW 15 4 0 0 0 0 19 NNW 15 10 0 0 0 0 25 Variable 0 0 0 0 0 0 0 Total 282 351 78 1 0 0 712 Hours of calm in this stability class: 25 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-33

Braidwood Generating Station Period of Record: July - September 2015 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 2 2 0 0 0 0 4 NNE 8 0 0 0 0 0 8 NE 6 0 0 0 0 0 6 ENE 16 0 0 0 0 0 16 E 28 0 0 0 0 0 28 ESE 14 4 0 0 0 0 18 SE 6 1 0 0 0 0 7 SSE 5 1 0 0 0 0 6 S 3 4 0 0 0 0 7 SSW 1 5 1 0 0 0 7 SW 2 0 0 0 0 0 2 WSW 11 13 0 0 0 0 24 W 21 9 0 0 0 0 30 WNW 13 0 0 0 0 0 13 NW 5 0 0 0 0 0 5 NNW 5 1 0 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 146 40 1 0 0 0 187 Hours of calm in this stability class: 25 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-34

Braidwood Generating Station Period of Record: July - September 2015 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 3 0 0 0 0 0 3 NNE 3 0 0 0 0 0 3 NE 4 0 0 0 0 0 4 ENE 10 0 0 0 0 0 10 E 12 0 0 0 0 0 12 ESE 7 1 0 0 0 0 8 SE 1 0 0 0 0 0 1 SSE 0 0 0 0 0 0 0 S 0 1 0 0 0 0 1 SSW 0 1 0 0 0 0 1 SW 0 0 0 0 0 0 0 WSW 4 2 0 0 0 0 6 W 16 1 0 0 0 0 17 WNW 16 0 0 0 0 0 16 NW 6 0 0 0 0 0 6 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 82 6 0 0 0 0 88 Hours of calm in this stability class: 54 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-35

Braidwood Generating Station Period of Record: July - September 2015 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 1 1 0 2 0 4 NE 0 2 1 2 0 0 5 ENE 0 5 2 0 0 0 7 E 0 8 13 0 0 0 21 ESE 1 5 3 0 0 0 9 SE 1 6 2 0 0 0 9 SSE 2 12 4 7 0 0 25 S 0 6 14 13 2 0 35 SSW 1 1 13 5 3 0 23 SW 0 3 11 7 4 0 25 WSW 0 5 15 7 0 0 27 W 0 6 15 8 12 0 41 WNW 0 4 17 9 1 0 31 NW 0 4 8 4 2 0 18 NNW 0 0 9 5 0 0 14 Variable 0 0 0 0 0 0 0 Total 5 68 129 67 26 0 295 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 3 F-36

Braidwood Generating Station Period of Record: July - September 2015 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 6 0 0 0 6 NNE 0 0 1 0 1 0 2 NE 0 3 5 5 1 0 14 ENE 1 8 2 2 0 0 13 E 2 8 1 0 0 0 11 ESE 3 5 0 0 0 0 8 SE 1 7 0 0 0 0 8 SSE 1 3 2 2 0 0 8 S 2 5 7 5 2 0 21 SSW 1 2 3 2 0 0 8 SW 1 1 1 0 1 0 4 WSW 0 5 8 2 0 0 15 W 2 7 6 0 1 0 16 WNW 0 1 4 4 1 0 10 NW 0 1 4 1 0 0 6 NNW 1 1 4 1 0 0 7 Variable 0 0 0 0 0 0 0 Total 15 57 54 24 7 0 157 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: 3 F-37

Braidwood Generating Station Period of Record: July - September 2015 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 3 0 0 0 7 NNE 0 2 2 0 0 0 4 NE 0 7 3 2 0 0 12 ENE 0 7 3 0 0 0 10 E 2 7 1 0 0 0 10 ESE 2 3 1 0 0 0 6 SE 2 6 0 0 0 0 8 SSE 2 1 0 0 0 0 3 S 0 0 7 3 0 0 10 SSW 0 3 1 5 0 0 9 SW 0 6 3 2 1 0 12 WSW 0 4 2 2 1 0 9 W 1 2 5 1 0 0 9 WNW 1 1 1 0 0 0 3 NW 0 0 4 1 0 0 5 NNW 0 1 1 1 0 0 3 Variable 0 0 0 0 0 0 0 Total 10 54 37 17 2 0 120 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 3 F-38

Braidwood Generating Station Period of Record: July - September 2015 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 10 19 3 0 0 34 NNE 3 11 8 11 9 0 42 NE 5 15 20 7 3 0 50 ENE 2 13 20 4 0 0 39 E 2 20 10 2 0 0 34 ESE 0 8 8 1 0 0 17 SE 0 10 22 4 0 0 36 SSE 1 7 25 3 0 0 36 S 1 8 15 21 5 0 50 SSW 0 2 19 11 0 0 32 SW 1 7 26 9 6 0 49 WSW 0 5 17 6 0 0 28 W 2 8 8 4 0 0 22 WNW 1 7 4 5 0 0 17 NW 2 8 4 8 1 0 23 NNW 1 11 9 3 0 0 24 Variable 0 0 0 0 0 0 0 Total 23 150 234 102 24 0 533 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 F-39

Braidwood Generating Station Period of Record: July - September 2015 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 11 20 3 0 0 35 NNE 1 3 13 4 0 0 21 NE 2 4 18 6 0 0 30 ENE 0 24 19 0 0 0 43 E 0 23 23 3 0 0 49 ESE 1 8 19 1 0 0 29 SE 1 17 33 8 0 0 59 SSE 1 9 23 27 1 0 61 S 1 12 44 59 3 0 119 SSW 1 9 54 27 1 0 92 SW 1 5 43 16 0 0 65 WSW 0 9 17 4 0 0 30 W 3 10 19 4 0 0 36 WNW 3 9 9 3 0 0 24 NW 0 4 6 1 0 0 11 NNW 1 10 16 0 0 0 27 Variable 0 0 0 0 0 0 0 Total 17 167 376 166 5 0 731 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 6 Hours of missing stability measurements in all stability classes: 3 F-40

Braidwood Generating Station Period of Record: July - September 2015 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 0 2 1 0 0 4 NNE 0 1 2 0 0 0 3 NE 0 2 5 1 0 0 8 ENE 0 8 2 0 0 0 10 E 0 2 13 2 0 0 17 ESE 0 6 9 8 0 0 23 SE 0 6 7 1 0 0 14 SSE 2 4 5 0 0 0 11 S 1 5 4 0 0 0 10 SSW 0 5 7 2 0 0 14 SW 0 11 3 1 0 0 15 WSW 2 7 10 1 0 0 20 W 2 3 10 10 0 0 25 WNW 0 0 14 4 0 0 18 NW 0 3 6 0 0 0 9 NNW 3 5 3 0 0 0 11 Variable 0 0 0 0 0 0 0 Total 11 68 102 31 0 0 212 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 F-41

Braidwood Generating Station Period of Record: July - September 2015 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 2 0 2 0 0 0 4 NNE 1 1 1 0 0 0 3 NE 1 1 0 0 0 0 2 ENE 3 0 0 0 0 0 3 E 3 1 6 1 0 0 11 ESE 3 2 2 6 0 0 13 SE 3 8 3 2 0 0 16 SSE 2 3 0 0 0 0 5 S 5 3 0 1 0 0 9 SSW 6 5 0 0 0 0 11 SW 2 7 1 0 0 0 10 WSW 3 5 1 0 0 0 9 W 1 3 7 3 0 0 14 WNW 2 3 10 0 0 0 15 NW 3 8 1 0 0 0 12 NNW 3 2 0 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 43 52 34 13 0 0 142 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 F-42

Braidwood Generating Station Period of Record: October - December2015 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 2 0 0 0 2 NNE 0 1 0 0 0 0 1 NE 0 1 0 0 0 0 1 ENE 0 0 0 0 0 0 0 E 0 2 0 0 0 0 2 ESE 0 3 0 0 0 0 3 SE 0 1 1 0 0 0 2 SSE 0 0 1 0 0 0 1 S 0 1 2 2 0 0 5 SSW 0 3 3 5 2 0 13 SW 0 2 4 3 0 0 9 WSW 0 3 2 2 1 0 8 W 0 0 3 1 0 0 4 WNW 0 0 4 3 1 0 8 NW 0 6 9 0 0 0 15 NNW 0 1 5 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 0 24 36 16 4 0 80 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: 29 F-43

Braidwood Generating Station Period of Record: October - December2015 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 0 1 0 0 1 NE 0 1 2 0 0 0 3 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 1 0 0 0 0 1 SE 0 1 0 1 0 0 2 SSE 0 2 0 1 0 0 3 S 0 1 2 1 0 0 4 SSW 0 3 4 2 0 0 9 SW 0 0 5 2 0 0 7 WSW 0 1 0 1 1 0 3 W 0 1 4 3 0 0 8 WNW 1 1 7 3 1 0 13 NW 0 2 1 0 0 0 3 NNW 0 1 2 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 1 15 27 15 2 0 60 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: 29 F-44

Braidwood Generating Station Period of Record: October - December2015 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 1 2 0 0 0 3 NE 0 4 3 2 0 0 9 ENE 0 1 0 0 0 0 1 E 0 0 0 0 0 0 0 ESE 1 1 0 0 0 0 2 SE 0 1 0 1 0 0 2 SSE 0 1 2 0 0 0 3 S 0 4 1 1 0 0 6 SSW 0 0 2 3 0 0 5 SW 0 1 3 0 0 0 4 WSW 0 5 3 0 0 0 8 W 0 0 1 6 1 0 8 WNW 0 3 1 0 0 0 4 NW 0 2 1 0 0 0 3 NNW 0 1 0 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 1 27 20 13 1 0 62 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 29 F-45

Braidwood Generating Station Period of Record: October - December2015 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 4 4 0 0 0 11 NNE 3 32 30 6 0 0 71 NE 2 34 36 12 0 0 84 ENE 2 17 13 1 0 0 33 E 2 19 5 0 0 0 26 ESE 1 10 4 0 0 0 15 SE 1 7 28 18 1 0 55 SSE 1 10 26 7 2 0 46 S 1 10 20 27 6 0 64 SSW 1 6 26 19 9 0 61 SW 0 14 35 10 3 0 62 WSW 1 13 34 17 5 1 71 W 4 26 37 18 5 0 90 WNW 2 21 24 9 2 0 58 NW 2 2 7 0 0 0 11 NNW 4 6 10 0 0 0 20 Variable 0 0 0 0 0 0 0 Total 30 231 339 144 33 1 778 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 9 Hours of missing stability measurements in all stability classes: 29 F-46

Braidwood Generating Station Period of Record: October - December2015 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 2 6 11 0 0 0 19 NNE 0 24 9 0 0 0 33 NE 6 9 1 3 0 0 19 ENE 7 27 8 7 0 0 49 E 9 18 0 0 0 0 27 ESE 4 16 7 0 0 0 27 SE 9 23 30 7 0 0 69 SSE 2 57 33 10 0 0 102 S 4 49 88 45 1 0 187 SSW 0 12 43 18 4 0 77 SW 3 30 40 9 1 0 83 WSW 2 35 23 11 0 0 71 W 3 19 21 17 0 0 60 WNW 2 33 13 3 0 0 51 NW 4 5 1 0 0 0 10 NNW 3 15 0 0 0 0 18 Variable 0 0 0 0 0 0 0 Total 60 378 328 130 6 0 902 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 35 Hours of missing stability measurements in all stability classes: 29 F-47

Braidwood Generating Station Period of Record: October - December2015 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 0 1 0 0 0 0 1 NNE 0 1 0 0 0 0 1 NE 1 0 0 0 0 0 1 ENE 5 0 0 0 0 0 5 E 8 0 0 0 0 0 8 ESE 8 1 0 0 0 0 9 SE 2 2 0 0 0 0 4 SSE 2 5 0 0 0 0 7 S 3 2 0 0 0 0 5 SSW 0 5 10 0 0 0 15 SW 1 5 5 0 0 0 11 WSW 7 9 0 0 0 0 16 W 25 15 0 0 0 0 40 WNW 22 6 0 0 0 0 28 NW 8 0 0 0 0 0 8 NNW 3 0 0 0 0 0 3 Variable 1 0 0 0 0 0 1 Total 96 52 15 0 0 0 163 Hours of calm in this stability class: 4 Hours of missing wind measurements in this stability class: 4 Hours of missing stability measurements in all stability classes: 29 F-48

Braidwood Generating Station Period of Record: October - December2015 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 1 0 0 0 0 0 1 NE 2 0 0 0 0 0 2 ENE 3 0 0 0 0 0 3 E 12 0 0 0 0 0 12 ESE 2 0 0 0 0 0 2 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 2 0 0 0 0 0 2 SSW 0 1 0 0 0 0 1 SW 0 3 0 0 0 0 3 WSW 4 4 0 0 0 0 8 W 10 5 0 0 0 0 15 WNW 7 0 0 0 0 0 7 NW 2 0 0 0 0 0 2 NNW 1 0 0 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 47 13 0 0 0 0 60 Hours of calm in this stability class: 21 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 29 F-49

Braidwood Generating Station Period of Record: October - December2015 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 2 0 0 0 0 2 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 3 0 0 0 3 ESE 0 0 2 0 0 0 2 SE 0 1 1 0 0 0 2 SSE 0 1 0 1 0 0 2 S 0 0 0 1 0 1 2 SSW 0 2 2 1 5 3 13 SW 0 0 2 5 1 0 8 WSW 0 0 3 3 0 0 6 W 0 0 1 2 0 0 3 WNW 0 0 1 4 2 3 10 NW 0 1 7 8 0 0 16 NNW 0 0 2 2 0 0 4 Variable 0 0 0 0 0 0 0 Total 0 7 25 27 8 7 74 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 6 Hours of missing stability measurements in all stability classes: 29 F-50

Braidwood Generating Station Period of Record: October - December2015 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 1 0 1 NE 0 0 2 1 0 0 3 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 1 0 0 0 0 1 SE 0 1 0 0 0 0 1 SSE 0 1 1 0 1 0 3 S 0 2 1 0 0 0 3 SSW 0 1 1 4 0 1 7 SW 0 0 1 3 1 0 5 WSW 0 0 2 0 2 0 4 W 0 0 1 3 1 0 5 WNW 1 1 0 5 4 2 13 NW 0 2 1 1 0 0 4 NNW 0 0 1 1 0 0 2 Variable 0 0 0 0 0 0 0 Total 1 9 11 18 10 3 52 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 8 Hours of missing stability measurements in all stability classes: 29 F-51

Braidwood Generating Station Period of Record: October - December2015 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 2 1 0 0 4 NNE 0 0 0 0 1 0 1 NE 0 4 1 3 1 0 9 ENE 0 0 0 0 0 0 0 E 0 0 1 0 0 0 1 ESE 1 0 1 0 0 0 2 SE 0 1 1 0 0 0 2 SSE 0 0 0 2 0 0 2 S 0 4 1 1 0 0 6 SSW 0 1 1 1 2 1 6 SW 0 1 0 2 0 0 3 WSW 0 4 1 2 0 0 7 W 0 0 1 1 5 0 7 WNW 0 1 1 2 0 0 4 NW 0 1 1 1 0 0 3 NNW 0 1 0 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 1 19 12 16 9 1 58 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 4 Hours of missing stability measurements in all stability classes: 29 F-52

Braidwood Generating Station Period of Record: October - December2015 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 5 7 1 1 0 15 NNE 0 22 25 25 12 0 84 NE 0 15 22 29 14 0 80 ENE 2 4 13 4 0 0 23 E 0 3 6 15 3 0 27 ESE 0 1 4 11 0 0 16 SE 0 4 5 12 3 2 26 SSE 0 2 9 13 8 2 34 S 0 2 11 12 16 18 59 SSW 1 4 5 22 13 6 51 SW 1 10 13 17 7 3 51 WSW 1 4 25 21 15 6 72 W 1 12 23 23 14 9 82 WNW 1 4 11 22 17 3 58 NW 3 1 4 5 4 0 17 NNW 1 2 2 9 3 0 17 Variable 0 0 0 0 0 0 0 Total 12 95 185 241 130 49 712 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 75 Hours of missing stability measurements in all stability classes: 29 F-53

Braidwood Generating Station Period of Record: October - December2015 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 1 12 11 2 0 26 NNE 0 2 12 10 2 0 26 NE 0 3 8 11 5 0 27 ENE 1 12 30 5 0 0 48 E 0 3 15 13 0 0 31 ESE 0 3 6 20 2 0 31 SE 1 5 20 25 8 3 62 SSE 1 5 20 23 22 2 73 S 1 5 32 74 54 21 187 SSW 0 9 17 37 11 12 86 SW 0 8 23 27 6 2 66 WSW 1 4 24 15 9 0 53 W 1 2 11 26 17 5 62 WNW 0 0 29 19 9 1 58 NW 0 1 7 4 1 0 13 NNW 1 1 19 1 0 0 22 Variable 0 0 0 0 0 0 0 Total 7 64 285 321 148 46 871 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 66 Hours of missing stability measurements in all stability classes: 29 F-54

Braidwood Generating Station Period of Record: October - December2015 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 0 0 0 0 0 0 NNE 0 0 1 1 0 0 2 NE 0 0 1 0 0 0 1 ENE 0 1 3 0 0 0 4 E 0 2 2 1 0 0 5 ESE 0 0 1 8 0 0 9 SE 0 0 0 1 0 0 1 SSE 0 3 1 0 0 0 4 S 1 3 6 3 0 0 13 SSW 0 3 4 1 0 0 8 SW 0 4 4 10 2 0 20 WSW 0 4 2 3 0 0 9 W 1 1 9 9 0 0 20 WNW 0 3 27 15 0 0 45 NW 0 3 17 1 0 0 21 NNW 0 4 1 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 2 31 79 53 2 0 167 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 4 Hours of missing stability measurements in all stability classes: 29 F-55

Braidwood Generating Station Period of Record: October - December2015 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 3 0 0 0 0 4 NNE 1 5 0 0 0 0 6 NE 0 2 1 0 0 0 3 ENE 0 3 0 0 0 0 3 E 0 0 1 1 0 0 2 ESE 0 4 0 1 0 0 5 SE 0 0 4 0 0 0 4 SSE 1 7 1 0 0 0 9 S 0 1 0 0 0 0 1 SSW 2 0 0 0 0 0 2 SW 0 1 1 1 0 0 3 WSW 0 1 2 0 0 0 3 W 1 1 3 9 0 0 14 WNW 2 0 4 1 0 0 7 NW 1 3 3 0 0 0 7 NNW 3 2 1 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 12 33 21 13 0 0 79 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: 29 F-56

APPENDIX G ERRATA DATA

Intentionally left blank 2015 Errata Data

1. More accurate distances to the ISFSI pad were updated in the ODCM in 2015. The distances reported in the 2014 AREOR were incorrect.

BD-104-3, 0.11 mi E

BD-104-4, 0.13 mi E

BD-105-3, 0.23 mi SE

BD-105-4, 0.20 mi SE

BD-110-3, 0.18 mi SE

BD-110-4, 0.15 mi SE

2. Page B-3, ISFSI dosimeter locations and directions were updated with the following averaged distances and directions:

BD-104-3 and -4, 0.12 mi E

BD-105-3 and -4, 0.22 mi SE

BD-110-3 and -4, 0.17 mi SE

3. Page B-6, Figure B-1, Inner Ring and Other OSLD map, was updated to reflect the corrected distances that were included in the 2015 ODCM revision.

G-1

Intentionally left blank G-2

APPENDIX H ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)

Intentionally left blank Docket No: 50-456 50-457 BRAIDWOOD STATION UNITS 1 and 2 Annual Radiological Groundwater Protection Program Report 1 January through 31 December 2015 Prepared By Teledyne Brown Engineering Environmental Services Braidwood Station Braceville, IL 60407 May 2016

Intentionally left blank Table Of Contents I. Summary and Conclusions .............................................................................................. 1 II. Introduction ..................................................................................................................... 3 A. Objectives of the RGPP ...................................................................................... 3 B. Implementation of the Objectives ........................................................................ 3 C. Program Description ........................................................................................... 4 D. Characteristics of Tritium (H-3) ........................................................................... 4 III. Program Description ...................................................................................................... 5 A. Sample Analysis .................................................................................................. 5 B. Data Interpretation............................................................................................... 5 C. Background Analysis........................................................................................... 6

1. Background Concentrations of Tritium ..................................................... 7 IV. Results and Discussion ................................................................................................. 8 A. Missed Samples .................................................................................................. 8 B. Groundwater Results........................................................................................... 9 C. Surface Water Results ...................................................................................... 11 D. Drinking Water Well Survey .............................................................................. 11 E. Summary of Results - Inter-laboratory Comparison Program .......................... 11 F. Leaks, Spills, and Releases .............................................................................. 11 G. Trends ............................................................................................................... 12 H. Investigations .................................................................................................... 12 I. Actions Taken ..................................................................................................... 12 i

Appendices Appendix A Location Designation Tables Table A-1 Radiological Groundwater Protection Program - Sampling Locations, Braidwood Station, 2015 Figures Figure A-1 Sampling Locations near the Site Boundary of the Braidwood Station, 2015 Figure A-2 Intermediate Sampling Locations of the Braidwood Station, 2015 Figure A-3 Distant Sampling Locations of the Braidwood Station, 2015 Appendix B Data Tables Tables Table B-I.1 Concentrations of Tritium, Strontium, Gross Alpha and Gross Beta in Groundwater Samples Collected in the Vicinity of Braidwood Station, 2015.

Table B-I.2 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of Braidwood Station, 2015.

Table B-I.3 Concentrations of Hard-To-Detects in Groundwater Samples Collected in the Vicinity of Braidwood Station, 2015.

Table B-II.1 Concentrations of Tritium, Strontium, Gross Alpha and Gross Beta in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2015.

Table B-II.2 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2015.

ii

I. Summary and Conclusions In 2015, Exelon continued a comprehensive program that evaluates the impact of station operations on groundwater and surface water in the vicinity of Braidwood Station. This evaluation involved numerous station personnel and contractor support personnel. This report covers groundwater and surface water samples collected from the environment, both on and off station property, in 2015. During that time period, 619 analyses were performed on 217 samples from 77 locations.

In assessing all the data gathered for this report, it was concluded that the operation of Braidwood Station had no adverse radiological impact on the environment.

Gamma-emitting radionuclides associated with licensed plant operations were not detected at concentrations greater than their respective Lower Limits of Detection (LLDs) as specified in the Offsite Dose Calculation Manual (ODCM) in any of the groundwater or surface water samples. In the case of tritium, Exelon specified that its laboratories achieve a lower limit of detection 10 times less than Braidwoods ODCM and 100 times less than federal regulation.

Strontium-89/90 was not detected at a concentration greater than the LLD of 10.0 and 1.0 picoCuries per liter (pCi/L) respectively in any of the groundwater samples tested.

No tritium was detected in the groundwater or surface water samples at concentrations greater than the United States Environmental Protection Agency (USEPA) drinking water standard (and the Nuclear Regulatory Commission Reporting Limit) of 20,000 pCi/L. Low levels of tritium were detected in groundwater and surface water at concentrations greater than the LLD of 200 pCi/L in 79 of 217 analyses. The tritium concentrations ranged from 186 +/- 112 pCi/L to 3,200 +/- 373 pCi/L. The tritium that was detected in the groundwater or surface water is believed to be the result of isolated historical releases and/or background from external sources greater than 200 pCi/L.

Gross Alpha and Gross Beta analyses in the dissolved and suspended fractions were performed on groundwater and surface water samples throughout the sampling year in 2015. Gross Alpha (dissolved) was not detected in any groundwater and surface water samples. Gross Alpha (suspended) was detected in two groundwater samples. The concentrations ranged from 1.3 to 3.0 pCi/L. Gross Beta (dissolved) was detected in 49 groundwater and surface water samples. The concentrations ranged from 1.7 to 47.1 pCi/L. Gross Beta (suspended) was detected in one groundwater sample. The concentration was 3.6 pCi/L.

Hard-To-Detect analyses were performed on one groundwater sample in 2015.

The analyses included Am-241, Cm-242, Cm-243/244, Pu-238, Pu-239/240, U-234, U-235 and U-238. Uranium-234 and Uranium-238 was detected in the sample at concentrations of 0.4 pCi/L and 0.5 pCi/L, respectively. All other hard-to-detect nuclides were not detected at concentrations greater than their respective MDCs.

II. Introduction Braidwood Station, a two-unit PWR station is located in Will County, Illinois, fifteen (15) miles south-southwest of Joliet, Illinois. Each reactor is designed to have a capacity of 3,587 thermal megawatts. Units No. 1 went critical on May 29, 1987 and Unit No. 2 went critical on March 8, 1988. The station has been designed to keep releases to the environment at levels below those specified in the regulations.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) and Environmental Inc. Midwest Labs (EIML) on samples collected in 2015.

A. Objective of the Radiological Groundwater Protection Program (RGPP)

The long-term objectives of the RGPP are as follows:

1. Identify suitable locations to monitor and evaluate potential impacts from station operations to preclude radiological impact to the environment and potential drinking water sources.

2. Understand the local hydrogeologic regime in the vicinity of the station and maintain up-to-date knowledge of flow patterns on the surface and shallow subsurface.

3. Perform routine water sampling and radiological analysis of water from selected locations.

4. Report new leaks, spills, or other detections with potential radiological significance to stakeholders in a timely manner.

5. Regularly assess analytical results to identify adverse trends.

6. Take necessary corrective actions to protect groundwater resources.

B. Implementation of the Objectives The objectives identified have been implemented at Braidwood Station as discussed below:

1. Exelon identified locations to monitor and evaluated potential impacts from station operations.

2. The Braidwood Station reports describe the local hydrogeologic regime. Periodically, the flow patterns on the surface and shallow subsurface are updated based on ongoing measurements.

3. Braidwood Station will continue to perform routine sampling and radiological analysis of water from selected locations.

4. Braidwood Station has implemented procedures to identify and report new leaks, spills, or other detections with potential radiological significance in a timely manner.

5. Braidwood Station staff and consulting hydrogeologist assess analytical results on an ongoing basis to identify adverse trends.

C. Program Description

1. Sample Collection Sample locations can be found in Table A-1 and Figures A-1 through A-3, Appendix A.

Groundwater and Surface Water Samples of groundwater and surface water are collected, managed, transported and analyzed in accordance with EPA methods. Sample locations, sample collection frequencies and analytical frequencies are managed in accordance with approved station procedures. Contractor and/or station personnel are trained in the collection, preservation management and shipment of samples as well as in documentation of sampling events.

Analytical laboratories are subject to internal quality assurance programs, industry cross-check programs as well as nuclear industry audits. Station personnel review and evaluate all analytical data as it is received. Additionally, analytical data results are reviewed by an independent hydrogeologist for adverse trends or changes to hydrogeologic conditions.

D. Characteristics of Tritium (H-3)

Tritium is a radioactive isotope of hydrogen. Its chemical properties are the same as hydrogen. Tritiated water behaves the same as ordinary water in both the environment and the body. Tritiated water can be taken into the body by drinking water, breathing air, eating food or absorption through the skin. Once tritiated water enters the body, it disperses quickly and is uniformly distributed. Tritiated water is excreted primarily through urine with a clearance rate characterized by an effective biological half-life of about 14 days. With such a short biological half-life, an acute ingestion would be cleared rapidly. Organically bound tritium (tritium that is incorporated into carbon containing compounds) can remain in the body for a longer period.

Tritium is produced naturally in the upper atmosphere when cosmic rays interact with air molecules. Tritium is also produced during nuclear weapons explosions, as a by-product in reactors producing electricity and in special production reactors. Like normal water, tritiated water is colorless and odorless. Tritiated water behaves chemically and physically like non-tritiated water in the subsurface and therefore tritiated water will travel at the same velocity as non tritiated groundwater.

III. Program Description A. Sample Analysis This section describes the general analytical methodologies used by Teledyne Brown Engineering (TBE) and Environmental Incorporated Midwest Laboratory (EIML) to analyze the environmental samples for radioactivity for the Braidwood Station RGPP in 2015.

In order to achieve the stated objectives, the current program includes the following analyses:

1. Concentrations of gamma emitters in groundwater and surface water.

2. Concentrations of strontium in groundwater and surface water.

3. Concentrations of tritium in groundwater and surface water.

4. Concentrations of Gross Alpha and Gross Beta (Dissolved and Suspended) in groundwater and surface water.

5. Concentrations of Am-241 in groundwater.

6. Concentrations of Cm-242 and Cm-243/244 in groundwater.

7. Concentrations of Pu-238 and Pu-239/240 in groundwater.

8. Concentrations of U-234, U-235 and U-238 in groundwater.

9. Concentrations of Fe-55 in groundwater.

10. Concentrations of Ni-63 in groundwater.

B. Data Interpretation The radiological data collected prior to Braidwood Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Braidwood Station was considered operational at initial criticality. Several factors were important in the interpretation of the data:

1. Lower Limit of Detection and Minimum Detectable Concentration The lower limit of detection (LLD) is specified by federal regulation as a minimum sensitivity value that must be achieved routinely by the analytical parameter.

2. Laboratory Measurements Uncertainty The estimated uncertainty in measurement of tritium in environmental samples is frequently on the order of 50% of the measurement value.

Statistically, the exact value of a measurement is expressed as a range with a stated level of confidence. The convention is to report results with a 95% level of confidence. The uncertainty comes from calibration standards, sample volume or weight measurements, sampling uncertainty and other factors. Exelon reports the uncertainty of a measurement created by statistical process (counting error) as well as all sources of error (Total Propagated Uncertainty or TPU). Each result has two values calculated. Exelon reports the TPU by following the result with plus or minus (+/-) the estimated sample standard deviation, as TPU, that is obtained by propagating all sources of analytical uncertainty in measurements.

Analytical uncertainties are reported at the 95% confidence level in this report for reporting consistency with the AREOR.

Gamma spectroscopy results for each type of sample were grouped as follows:

For groundwater and surface water 14 nuclides, Be-7, K-40, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, I-131, Cs-134, Cs-137, Ba-140 and La-140 were reported.

C. Background Analysis A pre-operational radiological environmental monitoring program (pre-operational REMP) was conducted to establish background radioactivity levels prior to operation of the Station. The environmental media sampled and analyzed during the pre-operational REMP were atmospheric radiation, fall-out, domestic water, surface water, marine life and foodstuffs. The results of the monitoring were detailed in the report entitled, Environmental Radiological Monitoring for Braidwood Nuclear Power Station Commonwealth Edison Company, Annual Report 1986, May 1987.

1. Background Concentrations of Tritium The purpose of the following discussion is to summarize background measurements of tritium in various media performed by others.

a. Tritium Production Tritium is created in the environment from naturally occurring processes both cosmic and subterranean, as well as from anthropogenic (i.e., man-made) sources. In the upper atmosphere, Cosmogenic tritium is produced from the bombardment of stable nuclides and combines with oxygen to form tritiated water, which will then enter the hydrologic cycle. Below ground, lithogenic tritium is produced by the bombardment of natural lithium present in crystalline rocks by neutrons produced by the radioactive decay of naturally abundant uranium and thorium. Lithogenic production of tritium is usually negligible compared to other sources due to the limited abundance of lithium in rock. The lithogenic tritium is introduced directly to groundwater.

A major anthropogenic source of tritium and strontium-90 comes from the former atmospheric testing of thermonuclear weapons. Levels of tritium in precipitation increased significantly during the 1950s and early 1960s and later with additional testing, resulting in the release of significant amounts of tritium to the atmosphere. The Canadian heavy water nuclear power reactors, other commercial power reactors, nuclear research and weapons production continue to influence tritium concentrations in the environment.

b. Precipitation Data Precipitation samples are routinely collected at stations around the world for the analysis of tritium and other radionuclides. Two publicly available databases that provide tritium concentrations in precipitation are Global Network of Isotopes in Precipitation (GNIP) and USEPAs RadNet database. GNIP provides tritium precipitation concentration data for samples collected world wide from 1960 to 2014.

RadNet provides tritium precipitation concentration data for samples collected at stations through out the U.S. from 1960 up to and including 2015. Based on GNIP data for sample stations located in the U.S. Midwest, tritium concentrations peaked around 1963. This peak, which approached 10,000 pCi/L for some stations, coincided with the atmospheric testing of thermonuclear weapons. Tritium concentrations in surface water showed a sharp decline up until 1975 followed by a gradual decline since that time. Tritium concentrations in Midwest precipitation have typically been below 100 pCi/L since around 1980. Tritium concentrations in wells may still be above the 200 pCi/L detection limit from the external causes described above. Water from previous years and decades is naturally captured in groundwater, so some well water sources today are affected by the surface water from the 1960s that was elevated in tritium.

c. Surface Water Data Tritium concentrations are routinely measured in large surface water bodies, including Lake Michigan and the Mississippi River. Illinois surface water data were typically less than 100 pCi/L.

The USEPA RadNet surface water data typically has a reported Combined Standard Uncertainty of 35 to 50 pCi/L.

According to USEPA, this corresponds to a +/- 70 to 100 pCi/L 95% confidence bound on each given measurement.

Therefore, the typical background data provided may be subject to measurement uncertainty of approximately +/- 70 to 100 pCi/L.

The radio-analytical laboratory is counting tritium results to an Exelon specified LLD of 200 pCi/L. Typically, the lowest positive measurement will be reported within a range of 40 -

240 pCi/L or 140 +/- 100 pCi/L. Clearly, these sample results cannot be distinguished as different from background at this concentration.

IV. Results and Discussion A. Missed Sample Exelon maintains a RGPP as part of the nuclear industry's voluntary groundwater protection initiative as described in NEI 07-07. As part of this program, samples are obtained routinely from monitoring wells and surface waters at Braidwood based on the frequencies outlined in station procedures.

During the third quarter of 2015, it was discovered that five remediation monitoring wells (VB-1-9D, P-4D, VB-3-4D, P-13D, and VB-2-5D) were removed in 2013 from the Radiological Groundwater Protection Program (RGPP) prematurely prior to meeting the requirement of two consecutive samples measure <LLD (200 pCi/L) for tritium.

After identifying this issue the previously abandoned wells were re-drilled so that samples could be obtained. The wells at these locations will remain until two consecutive <LLD measurements are obtained to support the closure of the consent order.

The following wells were missed during routine monitoring in 2015; MW-103 and 0WM31P. The Station RGPP requires the wells designated as detection wells to be sampled and analyzed for tritium on a quarterly basis. The aforementioned locations were not sampled during one or more of the quarters in 2015. Reasons for lack of sampling include well condition deficiencies (0WM31P) and inaccessibility due to damage and downed trees surrounding the well as a result of tornado activity (MW-103).

The Station RGPP also requires designated detection wells be analyzed for gamma-radionuclides, gross-alpha and beta, and strontium 89/90 on an annual basis. The well at MW-103 had these analyses performed during the third quarter of 2015 and not the second quarter of 2015 as scheduled due to well inaccessibility from the tornado activity mentioned above.

B. Groundwater Results Groundwater Samples were collected from on and off-site wells throughout the year in accordance with the Station radiological groundwater protection program. Analytical results and anomalies are discussed below.

Tritium Samples from all locations were analyzed for tritium activity.

Tritium values ranged from the lower detection limit to 3,200 pCi/l The wells with tritium results greater than the alert level of 2000 pCi/L were identified at locations MW-4, MW-6 and MW-BW-144D along the west side of the Turbine Building. These wells are located onsite and are not available as a drinking water source.

Some contamination still exists and monitoring is ongoing (Table B-I.1, Appendix B).

Strontium Strontium-89 and Strontium-90 were analyzed for in 63 samples.

Strontium-89 was less than the required detection limit of 10.0 pCi/liter. Strontium-90 was less than the required detection limit of 1.0 pCi/liter (Table B-I.1, Appendix B).

Gross Alpha and Beta (dissolved and suspended)

Gross Alpha and Gross Beta analyses in the dissolved and suspended fractions were performed on groundwater and surface water samples throughout the sampling year in 2015. Gross Alpha (dissolved) was not detected in any groundwater and surface water samples. Gross Alpha (suspended) was detected in two groundwater samples. The concentrations ranged from 1.3 to 3.0 pCi/L. Gross Beta (dissolved) was detected in 49 groundwater and surface water samples. The concentrations ranged from 1.7 to 47.1 pCi/L. Gross Beta (suspended) was detected in one groundwater sample. The concentration was 3.6 pCi/L.

(Table B-I.1, Appendix B).

Hard-To-Detect Hard-To-Detect analyses were performed on one groundwater sample in 2015 as a result of a positive gross alpha result. The analyses included Am-241, Cm-242, Cm-243/244, Pu-238, Pu-239/240, U-234, U-235 and U-238. Naturally occurring isotopes Uranium-234 and Uranium-238 was detected in the sample at concentrations of 0.4 pCi/L and 0.5 pCi/L, respectively. All other hard-to-detect nuclides were not detected at concentrations greater than their respective MDCs. (Table B-I.3, Appendix B).

Gamma Emitters Naturally occurring K-40 was detected in five samples. The concentrations ranged from 51 to 154 pCi/L. No other gamma emitting nuclides were detected in any of the samples analyzed.

(Table B-I.2, Appendix B)

C. Surface Water Results Surface Water Samples were collected from two surface water locations throughout the year in accordance with the station radiological groundwater protection program. Analytical results and anomalies are discussed below.

Tritium Samples from all locations were analyzed for tritium activity (Table B-II.1, Appendix B). Tritium values ranged from the minimum detection limit to 289 pCi/l.

Strontium Strontium-89 and Strontium-90 were analyzed for in one sample.

Strontium-89 was less than the required detection limit of 10.0 pCi/liter. Strontium-90 was less than the required detection limit of 1.0 pCi/liter (Table B-II.1, Appendix B).

Gamma Emitters No gamma emitting nuclides were detected in any of the samples analyzed (Table B-II.2, Appendix B).

D. Drinking Water Well Survey Requested drinking water wells near Braidwood Station were sampled during the first and second quarter in 2015.

E. Summary of Results - Inter-Laboratory Comparison Program Inter-Laboratory Comparison Program results for TBE are presented in the AREOR.

F. Leaks, Spills, and Releases There are no new previously unidentified leaks or plumes at Braidwood Station.

G. Trends and Analyses Monitoring of remediation activities indicate that tritium concentrations in affected areas have remained relatively unchanged since 2010.

H. Investigations No investigations took place in 2015 as a result of groundwater sample results.

I. Actions Taken

1. Compensatory Actions No compensatory actions were initiated in 2015.

2. Installation of Monitoring Wells No new monitoring wells were installed in 2015.

3. Actions to Recover/Reverse Plumes No actions were undertaken to recover/reverse plumes in 2015.

4. Well Reduction Efforts Sampling and monitoring of various well locations was ceased during the third quarter 2015. These wells were used during and after remediation activities completed under the March 11, 2010 Consent Order. On March 28, 2013 the Illinois EPA confirmed that remediation was complete at the sites subject to the March 11, 2010 Consent Order within letters sent to Exelon. In these same letters the Illinois EPA approved termination of pumping in recovery wells, cessation of sampling of most of the monitoring wells and the abandonment of wells not being used at these remediation sites APPENDIX A LOCATION DESIGNATION

Intentionally left blank TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Braidwood Station, 2015 Station Code Sample Description BL-03 Monitoring Well BL-06 Monitoring Well BL-06D Monitoring Well BL-09D Monitoring Well BL-10D Monitoring Well BL-11 Monitoring Well BL-11D Monitoring Well BL-12D Monitoring Well BL-13D Monitoring Well BL-14D Monitoring Well BL-15D Monitoring Well BL-16D Monitoring Well BL-17D Monitoring Well BL-18D Monitoring Well BL-21 Monitoring Well BL-22 Monitoring Well BL-23 Monitoring Well BL-24 Monitoring Well BL-25 Monitoring Well BL-26 Monitoring Well BL-27 Monitoring Well D-2D Surface Water D-3D Surface water DITCH (DS-2) Surface Water EXELON POND Surface Water F-1D Monitoring Well F-3D Monitoring Well F-3DR Monitoring Well F-4D Monitoring Well F-5D Monitoring Well F-6D Monitoring Well F-8D Monitoring Well F-9D Monitoring Well MW-102R Monitoring Well MW-103 Monitoring Well MW-105 Monitoring Well MW-105D Monitoring Well MW-106D Monitoring Well MW-107 Monitoring Well MW-109D Monitoring Well MW-11 Monitoring Well MW-110 Monitoring Well MW-111 Monitoring Well MW-111DR Monitoring Well MW-112D Monitoring Well MW-113 Monitoring Well MW-113DR Monitoring Well MW-13 Monitoring Well MW-130D Monitoring Well MW-131D Monitoring Well MW-132D Monitoring Well A-1

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Braidwood Station, 2015 Station Code Sample Description MW-133D Monitoring Well MW-134D Monitoring Well MW-135D Monitoring Well MW-136D Monitoring Well MW-137D Monitoring Well MW-138D Monitoring Well MW-139D Monitoring Well MW-14 Monitoring Well MW-140D Monitoring Well MW-141D Monitoring Well MW-142D Monitoring Well MW-143D Monitoring Well MW-144D Monitoring Well MW-145D Monitoring Well MW-154 Monitoring Well MW-155 Monitoring Well MW-156 Monitoring Well MW-158D Monitoring Well MW-159D Monitoring Well MW-160D Monitoring Well MW-161D Monitoring Well MW-162D Monitoring Well MW-2 Monitoring Well MW-22 Monitoring Well MW-4 Monitoring Well MW-5 Monitoring Well MW-6 Monitoring Well MW-7 Monitoring Well MW-9 Monitoring Well MW-BW-201BD Monitoring Well MW-BW-201I Monitoring Well MW-BW-201S Monitoring Well MW-BW-202I Monitoring Well MW-BW-202S Monitoring Well MW-BW-203I Monitoring Well MW-BW-203S Monitoring Well MW-BW-204I Monitoring Well MW-BW-205I Monitoring Well MW-BW-206I Monitoring Well MW-BW-207I Monitoring Well MW-BW-208BD Monitoring Well OWM31P Monitoring Well P-2D Monitoring Well P-4D Monitoring Well P-5D Monitoring Well P-13D Monitoring Well P-14D Monitoring Well RW-10 Monitoring Well RW-5 Monitoring Well A-2

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Braidwood Station, 2015 Station Code Sample Description RW-6 Monitoring Well RW-7 Monitoring Well RW-8 Monitoring Well RW-9 Monitoring Well S-1D Monitoring Well S-2D Monitoring Well S-4 Monitoring Well S-4D Monitoring Well S-5 Monitoring Well S-6 Monitoring Well S-7D Monitoring Well S-8 Monitoring Well S-8DR Monitoring Well SG-BW-105 Surface Water SG-BW-106 Surface Water SW-101 Surface Water SW-102 POINT C Surface Water SW-103 Surface Water SW-104 A DITCH Surface Water TB-20 Monitoring Well TB-20D Monitoring Well TB-21 Monitoring Well TB-21D Monitoring Well TB-22 Monitoring Well TB-22D Monitoring Well TB-23 Monitoring Well TB-23D Monitoring Well TB-24 Monitoring Well TB-24D Monitoring Well TB-25 Monitoring Well TB-25D Monitoring Well TB-26D Monitoring Well VB10-1 Monitoring Well VB10-1R Monitoring Well VB1-1 Monitoring Well VB1-10 Monitoring Well VB1-10D Monitoring Well VB11-1 Monitoring Well VB1-11 Monitoring Well VB1-11D Monitoring Well VB1-12D Monitoring Well VB1-2 Monitoring Well VB1-2D Monitoring Well VB1-3 Monitoring Well VB1-3D Monitoring Well VB1-4 Monitoring Well VB1-4D Monitoring Well VB1-5 Monitoring Well VB1-5D Monitoring Well A-3

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Braidwood Station, 2015 Station Code Sample Description VB1-6 Monitoring Well VB1-6D Monitoring Well VB1-7 Monitoring Well VB1-7D Monitoring Well VB1-8 Monitoring Well VB1-8D Monitoring Well VB1-9 Monitoring Well VB1-9D Monitoring Well VB2-10 Monitoring Well VB2-10D Monitoring Well VB2-11 Monitoring Well VB2-11D Monitoring Well VB2-12 Monitoring Well VB2-12D Monitoring Well VB2-13 Monitoring Well VB2-13D Monitoring Well VB2-14 Monitoring Well VB2-14D Monitoring Well VB2-15D Monitoring Well VB2-16 Monitoring Well VB2-16D Monitoring Well VB2-17 Monitoring Well VB2-17D Monitoring Well VB2-2D Monitoring Well VB2-5D Monitoring Well VB2-6D Monitoring Well VB2-7D Monitoring Well VB2-9D Monitoring Well VB3-10D Monitoring Well VB3-2 Monitoring Well VB3-4D Monitoring Well VB3-7D Monitoring Well VB3-9D Monitoring Well VB4-1 Monitoring Well VB4-5D Monitoring Well VB4-6D Monitoring Well VB5-2 Monitoring Well VB6-1 Monitoring Well VB7-1 Monitoring Well VB8-2R Monitoring Well VB9-1 Monitoring Well A-4

Figure A-1 Sampling Locations near the Site Boundary of Braidwood Station, 2015 A-5

Figure A-2 Sampling Locations near the Site Boundary of Braidwood Station, 2015 A-6

Figure A-3 Distant Sampling Locations of the Braidwood Station, 2015 A-7

Intentionally left blank APPENDIX B DATA TABLES

Intentionally left blank TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA, AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis) Gr-A (Sus) Gr-B (Dis) Gr-B (Sus)

BL-03 01/17/15 < 183 BL-03 04/11/15 < 164 BL-11 01/17/15 < 182 BL-11 04/11/15 < 162 DS-2 03/11/15 < 179 DS-2 06/24/15 < 181 < 6.6 < 0.5 < 1.0 < 1.2 3.6 +/- 1.0 < 2.2 DS-2 08/28/15 < 196 DS-2 10/07/15 < 184 F-1D 03/19/15 < 182 F-1D 06/18/15 < 172 F-3DR 03/19/15 < 178 F-3DR 06/18/15 < 175 F-4D 03/19/15 < 179 F-4D 06/17/15 < 175 F-5D 03/19/15 < 178 F-5D 06/17/15 < 174 F-6D 03/19/15 < 180 F-6D 06/18/15 < 175 F-8D 03/19/15 < 193 F-8D 06/18/15 < 175 F-9D 03/19/15 < 167 F-9D 06/18/15 < 173 MW-102R 01/17/15 < 180 MW-102R 04/11/15 < 163 MW-102R 08/28/15 < 197 MW-102R 10/07/15 < 185 MW-103 03/11/15 < 174 MW-103 09/09/15 Original < 196 < 6.7 < 0.8 < 1.1 3.0 +/- 1.6 < 1.6 3.6 +/- 1.8 MW-103 09/09/15 Reanalysis 1 < 1.1 2.6 +/- 1.1 MW-103 09/09/15 Reanalysis 2 < 1.1 4.0 +/- 1.3 MW-109D 03/11/15 < 175 MW-109D 04/12/15 < 167 < 5.2 < 0.7 < 1.3 < 0.6 1.7 +/- 0.9 < 1.4 MW-11 01/17/15 238 +/- 127 MW-11 04/05/15 310 +/- 130 < 4.7 < 0.5 < 1.8 < 0.4 3.3 +/- 1.0 < 1.3 MW-11 08/25/15 196 +/- 128 MW-11 10/18/15 < 200 MW-111DR 03/11/15 < 172 MW-111DR 05/06/15 < 195 < 5.2 < 0.9 < 1.0 1.3 +/- 0.7 < 1.3 < 1.6 MW-112D 03/09/15 < 174 MW-112D 05/06/15 < 184 < 4.7 < 0.7 < 1.5 < 0.4 3.0 +/- 1.2 < 1.5 MW-113 03/09/15 < 177 MW-113 06/24/15 < 182 < 6.8 < 0.8 < 2.1 < 0.6 2.5 +/- 1.4 < 1.4 MW-130D 03/11/15 < 172 MW-130D 04/12/15 < 161 < 5.1 < 0.7 < 1.3 < 0.6 2.0 +/- 0.9 < 1.4 MW-131D 03/11/15 < 176 MW-131D 04/12/15 < 176 < 5.3 < 0.6 < 1.5 < 0.7 3.9 +/- 1.1 < 1.5 MW-134D 03/09/15 < 175 MW-134D 05/06/15 < 184 < 5.5 < 0.7 < 0.6 < 0.4 1.8 +/- 1.1 < 1.5 MW-135D 03/18/15 < 177 < 3.7 < 0.6 < 1.2 < 0.4 < 3.0 < 1.7 MW-135D 06/17/15 < 173 < 5.6 < 0.7 < 1.4 < 0.5 2.2 +/- 1.0 < 1.7 MW-136D 03/18/15 < 174 < 4.5 < 0.7 < 2.7 < 0.4 3.9 +/- 2.4 < 1.7 B-1

TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA, AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis) Gr-A (Sus) Gr-B (Dis) Gr-B (Sus)

MW-136D 06/18/15 < 175 < 6.4 < 0.6 < 2.2 < 1.2 3.3 +/- 1.6 < 2.5 MW-137D 03/18/15 < 176 < 3.3 < 0.6 < 1.0 < 0.4 2.7 +/- 1.0 < 1.7 MW-137D 06/17/15 < 175 < 5.4 < 0.5 < 1.3 < 0.5 3.1 +/- 0.9 < 1.7 MW-138D 03/18/15 < 173 < 3.5 < 0.5 < 2.1 < 0.4 3.0 +/- 1.2 < 1.7 MW-138D 06/17/15 < 169 < 5.5 < 0.5 < 1.8 < 0.5 3.0 +/- 1.2 < 1.7 MW-139D 03/18/15 < 174 < 6.5 < 0.8 < 1.2 < 0.4 19.8 +/- 1.4 < 1.7 MW-139D 06/18/15 < 176 < 4.5 < 0.7 < 1.0 < 0.5 22.6 +/- 1.5 < 1.7 MW-141D 02/07/15 707 +/- 150 MW-141D 03/18/15 692 +/- 147 MW-141D 04/19/15 631 +/- 148 < 7.7 < 0.7 < 4.2 < 0.6 47.1 +/- 2.8 < 1.5 MW-141D 08/25/15 342 +/- 139 MW-141D 10/11/15 444 +/- 136 MW-142D 02/07/15 1450 +/- 207 MW-142D 04/19/15 938 +/- 160 < 5.3 < 0.5 < 5.5 < 0.6 25.7 +/- 2.8 < 1.5 MW-142D 08/24/15 1180 +/- 184 MW-142D 10/18/15 Original 1500 +/- 215 MW-142D 10/18/15 Reanalysis 1700 +/- 232 MW-143D 03/18/15 232 +/- 122 MW-143D 04/05/15 < 169 < 5.9 < 0.6 < 3.7 < 0.4 6.8 +/- 1.5 < 1.3 MW-143D 08/27/15 288 +/- 137 MW-143D 10/17/15 < 190 MW-144D 01/17/15 1290 +/- 185 MW-144D 04/22/15 Original 1130 +/- 175 < 6.3 < 0.8 < 5.3 < 0.6 12.3 +/- 1.8 < 1.5 MW-144D 04/22/15 Recount 12.1 +/- 2.5 MW-144D 08/26/15 Original 2010 +/- 266 MW-144D 08/26/15 Reanalysis 2290 +/- 286 MW-144D 10/11/15 Original 2020 +/- 262 MW-144D 10/11/15 Reanalysis 2040 +/- 262 MW-145D 03/19/15 < 172 < 3.2 < 0.5 < 0.8 < 0.4 < 1.2 < 1.7 MW-145D 06/18/15 < 176 < 5.3 < 0.6 < 0.9 < 0.5 < 1.4 < 1.7 MW-145D 09/23/15 < 185 MW-145D 12/09/15 < 189 MW-154 03/12/15 289 +/- 128 < 8.7 < 0.7 < 0.8 < 0.6 2.9 +/- 0.7 < 1.5 MW-154 05/07/15 334 +/- 133 < 5.5 < 0.9 < 0.6 < 0.6 2.1 +/- 0.7 < 1.5 MW-154 08/26/15 < 195 < 3.1 < 0.6 < 0.6 < 0.8 2.6 +/- 0.7 < 1.6 MW-154 10/25/15 < 192 < 7.4 < 0.7 < 0.8 < 0.6 2.3 +/- 0.7 < 1.6 MW-155 03/12/15 260 +/- 126 < 8.3 < 0.7 < 1.0 < 0.6 1.7 +/- 0.7 < 1.5 MW-155 05/07/15 227 +/- 128 < 6.0 < 0.8 < 0.9 < 0.7 2.6 +/- 0.8 < 1.7 MW-155 08/27/15 < 195 < 6.5 < 0.7 < 1.1 < 0.8 3.0 +/- 1.2 < 1.6 MW-155 10/25/15 < 190 < 6.1 < 0.8 < 1.3 < 0.6 3.5 +/- 1.0 < 1.6 MW-158D 03/18/15 < 173 < 5.3 < 0.6 < 0.9 < 0.4 39.4 +/- 3.7 < 1.7 MW-158D 06/18/15 < 174 < 5.2 < 0.6 < 1.0 < 0.5 43.1 +/- 1.9 < 1.7 MW-159D 01/17/15 390 +/- 137 < 3.5 < 1.0 < 1.9 < 1.2 6.7 +/- 1.3 < 2.3 MW-159D 04/12/15 186 +/- 112 < 5.4 < 0.7 < 3.9 < 0.6 6.5 +/- 1.4 < 1.4 MW-159D 08/24/15 266 +/- 136 < 3.5 < 0.8 < 1.6 < 0.8 6.1 +/- 1.4 < 1.6 MW-159D 10/18/15 < 199 < 6.5 < 0.9 < 1.6 < 0.7 4.0 +/- 1.1 < 2.2 MW-162D 01/17/15 784 +/- 159 MW-162D 04/05/15 761 +/- 149 < 6.2 < 0.6 < 1.9 < 0.4 5.5 +/- 1.1 < 1.3 MW-162D 08/24/15 591 +/- 151 MW-162D 10/18/15 610 +/- 153 MW-2 03/18/15 Original 800 +/- 153 B-2

TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA, AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis) Gr-A (Sus) Gr-B (Dis) Gr-B (Sus)

MW-2 03/18/15 Recount 878 +/- 160 MW-2 03/18/15 Reanalysis 1060 +/- 167 MW-2 05/07/15 682 +/- 152 < 4.6 < 0.8 < 1.3 < 0.6 4.5 +/- 2.1 < 1.5 MW-2 09/09/15 370 +/- 141 MW-2 10/11/15 375 +/- 132 MW-4 01/17/15 1460 +/- 198 MW-4 04/18/15 Original 3200 +/- 373 < 8.0 < 0.7 < 8.0 < 0.4 < 5.3 < 1.4 MW-4 04/18/15 Recount 3240 +/- 370 MW-4 08/25/15 1290 +/- 199 MW-4 10/22/15 1300 +/- 197 MW-5 01/17/15 383 +/- 135 MW-5 03/18/15 Original 734 +/- 149 MW-5 03/18/15 Recount 880 +/- 159 MW-5 03/18/15 Reanalysis 829 +/- 156 MW-5 04/05/15 702 +/- 150 < 7.0 < 0.8 < 1.4 < 0.4 < 1.1 < 1.3 MW-5 08/26/15 302 +/- 136 MW-5 10/11/15 435 +/- 136 MW-6 02/07/15 2190 +/- 276 MW-6 04/18/15 Original 1020 +/- 166 < 7.2 < 1.0 < 7.7 < 0.3 11.6 +/- 6.1 < 1.4 MW-6 04/18/15 Recount 1060 +/- 165 MW-6 08/25/15 895 +/- 163 MW-6 10/03/15 914 +/- 164 MW-7 03/18/15 Original 973 +/- 163 MW-7 03/18/15 Recount 1330 +/- 185 MW-7 03/18/15 Reanalysis 1220 +/- 176 MW-7 04/18/15 743 +/- 159 < 9.3 < 0.8 < 1.4 < 0.3 2.1 +/- 1.2 < 1.4 MW-7 08/25/15 788 +/- 158 MW-7 10/22/15 1160 +/- 184 MW-BW-201S 01/17/15 393 +/- 137 MW-BW-201S 04/10/15 447 +/- 129 < 6.1 < 0.9 < 1.3 < 0.6 8.4 +/- 1.4 < 1.4 MW-BW-201S 09/18/15 425 +/- 141 MW-BW-201S 10/17/15 215 +/- 127 MW-BW-202S 03/13/15 464 +/- 137 MW-BW-202S 04/10/15 295 +/- 119 < 4.9 < 0.7 < 4.3 < 0.6 10.0 +/- 1.9 < 1.4 MW-BW-202S 08/24/15 271 +/- 137 MW-BW-202S 10/17/15 396 +/- 136 MW-BW-203S 03/13/15 202 +/- 117 MW-BW-203S 04/10/15 196 +/- 112 < 4.5 < 1.0 < 1.1 < 0.6 7.6 +/- 1.2 < 1.4 MW-BW-203S 08/24/15 < 194 MW-BW-203S 10/17/15 236 +/- 128 MW-BW-207I 02/07/15 1040 +/- 173 MW-BW-207I 05/07/15 1050 +/- 171 < 4.6 < 0.6 < 7.3 < 0.6 15.7 +/- 5.3 < 1.5 MW-BW-207I 08/25/15 995 +/- 172 MW-BW-207I 10/11/15 1090 +/- 176 MW-P2D 06/17/15 < 172 OWM31P 12/31/15 < 193 P-13DR 08/20/15 Original 261 +/- 134 P-13DR 08/20/15 Recount 412 +/- 117 P-13DR 08/20/15 Reanalysis 256 +/- 123 P-13DR 12/09/15 < 190 P-2D 03/18/15 < 175 B-3

TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA, AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis) Gr-A (Sus) Gr-B (Dis) Gr-B (Sus)

P-4DR 08/20/15 < 192 P-4DR 09/23/15 < 190 P-4DR 12/09/15 < 184 PW-006 01/20/15 < 172 PW-006 04/08/15 < 174 PW-006P 01/20/15 < 173 PW-006P 04/08/15 < 174 PW-011 01/20/15 < 171 PW-011 04/08/15 < 178 PW-016 01/20/15 < 169 PW-016 04/08/15 < 173 PW-13 01/20/15 < 169 PW-13 04/08/15 < 174 RW-10 03/25/15 < 175 RW-10 05/06/15 < 181 < 5.0 < 0.7 < 1.0 < 0.4 2.7 +/- 0.9 < 1.5 RW-5 03/12/15 Original 198 +/- 123 RW-5 03/12/15 Recount 263 +/- 126 RW-5 06/24/15 < 182 < 6.1 < 0.6 < 2.7 < 0.6 3.0 +/- 1.8 < 1.4 RW-6 03/11/15 1420 +/- 194 RW-6 04/12/15 1110 +/- 161 < 5.7 < 0.8 < 1.9 < 0.6 5.5 +/- 1.3 < 1.4 RW-6 08/28/15 578 +/- 149 RW-6 08/28/15 420 +/- 142 RW-6 10/07/15 513 +/- 143 RW-7 03/11/15 Original 469 +/- 135 RW-7 03/11/15 Recount 450 +/- 138 RW-7 04/12/15 424 +/- 128 < 5.1 < 0.6 < 1.5 < 0.7 4.2 +/- 1.0 < 2.0 RW-9 01/17/15 < 182 RW-9 04/11/15 < 161 < 5.2 < 0.7 < 1.1 < 0.4 3.7 +/- 1.0 < 1.5 SG-BW-102 08/28/15 < 197 SG-BW-102 10/07/15 188 +/- 125 VB-1 06/24/15 < 187 VB-1-9DR 08/20/15 Original 275 +/- 138 VB-1-9DR 08/20/15 Recount 418 +/- 120 VB-1-9DR 08/20/15 Reanalysis 277 +/- 124 VB-1-9DR 09/22/15 < 193 VB-1-9DR 12/09/15 < 188 VB-10-1R 03/17/15 < 179 VB-10-1R 06/16/15 < 185 VB-10-1R 09/22/15 < 192 VB-10-1R 12/08/15 < 186 VB-11-1 03/18/15 < 176 VB-11-1 06/17/15 < 172 VB-11-1 09/23/15 < 188 VB-11-1 12/09/15 < 185 VB-2-5DR 08/20/15 < 192 VB-2-5DR 09/23/15 < 190 VB-2-5DR 12/09/15 Original 191 +/- 124 VB-2-5DR 12/09/15 Recount 245 +/- 132 VB-2-5DR 12/09/15 Reanalysis 250 +/- 131 VB-3-4DR 08/20/15 < 194 VB-3-4DR 09/23/15 < 188 B-4

TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA, AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis) Gr-A (Sus) Gr-B (Dis) Gr-B (Sus)

VB-3-4DR 12/09/15 < 183 VB-4-1 03/17/15 < 178 VB-4-1 06/16/15 < 169 VB-5-2 03/18/15 < 174 VB-5-2 06/16/15 < 186 VB-5-2 09/23/15 < 189 VB-5-2 12/09/15 < 185 VB-6-1 03/17/15 < 177 VB-6-1 06/16/15 < 175 VB-6-1 09/22/15 < 190 VB-6-1 12/08/15 < 188 VB-7-1 03/17/15 < 178 VB-7-1 06/16/15 < 167 VB-7-1 09/22/15 < 187 VB-7-1 12/08/15 < 187 VB-8-2R 03/17/15 < 179 VB-8-2R 06/16/15 < 172 VB-8-2R 09/22/15 < 188 VB-8-2R 12/08/15 < 189 VB-9-1 03/17/15 < 174 VB-9-1 06/16/15 < 183 VB-9-1 09/22/15 < 188 VB-9-1 12/08/15 < 189 VB-P-13DR 09/22/15 < 188 VB1-1 08/27/15 < 198 VB1-1 10/25/15 < 192 VB3-2 01/17/15 < 180 VB3-2 04/11/15 < 163 VB3-2 08/28/15 < 195 VB3-2 10/07/15 < 187 VBI-1 03/25/15 < 185 B-5

TABLE B-I.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 DATE DS-2 06/24/15 < 20 < 18 < 2 < 2 < 5 < 2 < 4 < 2 < 4 < 14 < 2 < 2 < 24 < 10 MW-103 09/09/15 < 20 < 54 < 2 < 2 < 5 < 2 < 4 < 2 < 4 < 13 < 2 < 2 < 21 < 7 MW-109D 04/12/15 < 14 < 13 < 1 < 2 < 3 < 1 < 3 < 2 < 3 < 9 < 1 < 1 < 15 < 4 MW-11 04/05/15 < 18 < 17 < 2 < 2 < 4 < 2 < 3 < 3 < 4 < 13 < 2 < 2 < 22 < 8 MW-111DR 05/06/15 < 14 < 10 < 1 < 1 < 3 < 1 < 3 < 2 < 2 < 13 < 1 < 1 < 19 < 5 MW-112D 05/06/15 < 14 < 31 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 15 < 1 < 1 < 19 < 7 MW-113 06/24/15 < 14 < 21 < 1 < 1 < 3 < 1 < 2 < 2 < 3 < 11 < 1 < 1 < 16 < 5 MW-130D 04/12/15 < 11 < 11 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 7 < 1 < 1 < 12 < 4 MW-131D 04/12/15 < 15 < 15 < 1 < 2 < 4 < 1 < 3 < 2 < 3 < 8 < 1 < 2 < 15 < 5 MW-134D 05/06/15 < 14 < 11 < 1 < 2 < 3 < 1 < 3 < 2 < 3 < 14 < 1 < 1 < 19 < 7 MW-135D 03/18/15 < 8 < 6 < 1 < 1 < 2 < 1 < 1 < 1 < 2 < 7 < 1 < 1 < 10 < 3 MW-135D 06/17/15 < 55 100 +/- 58 < 5 < 5 < 10 < 7 < 10 < 7 < 12 < 12 < 5 < 6 < 25 < 7 B-6 MW-136D 03/18/15 < 14 < 24 < 1 < 1 < 4 < 1 < 3 < 2 < 3 < 12 < 1 < 1 < 18 < 5 MW-136D 06/18/15 < 63 < 114 < 6 < 6 < 11 < 7 < 12 < 7 < 11 < 12 < 6 < 8 < 35 < 11 MW-137D 03/18/15 < 10 < 24 < 1 < 1 < 2 < 1 < 2 < 1 < 2 < 9 < 1 < 1 < 13 < 3 MW-137D 06/17/15 < 49 < 117 < 8 < 6 < 15 < 6 < 15 < 7 < 11 < 12 < 6 < 6 < 38 < 11 MW-138D 03/18/15 < 11 < 24 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 10 < 1 < 1 < 14 < 5 MW-138D 06/17/15 < 51 < 107 < 5 < 5 < 12 < 6 < 9 < 5 < 10 < 12 < 5 < 4 < 29 < 8 MW-139D 03/18/15 < 9 < 23 < 1 < 1 < 2 < 1 < 2 < 1 < 2 < 9 < 1 < 1 < 12 < 4 MW-139D 06/18/15 < 61 < 58 < 6 < 8 < 13 < 7 < 14 < 9 < 12 < 12 < 6 < 9 < 35 < 12 MW-141D 04/19/15 < 20 51 +/- 27 < 2 < 2 < 5 < 2 < 4 < 2 < 4 < 14 < 2 < 2 < 22 < 7 MW-142D 04/19/15 < 18 < 14 < 2 < 2 < 4 < 1 < 3 < 2 < 3 < 13 < 2 < 2 < 20 < 5 MW-143D 04/05/15 < 16 < 13 < 1 < 1 < 3 < 1 < 3 < 1 < 3 < 12 < 1 < 1 < 19 < 5 MW-144D 04/22/15 < 25 < 21 < 2 < 2 < 5 < 2 < 5 < 3 < 5 < 13 < 2 < 2 < 25 < 8 MW-145D 03/19/15 < 11 < 25 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 9 < 1 < 1 < 12 < 4 MW-145D 06/18/15 < 44 < 56 < 5 < 5 < 11 < 6 < 10 < 5 < 9 < 8 < 4 < 5 < 24 < 7 MW-154 03/12/15 < 9 < 7 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 16 < 1 < 1 < 18 < 6 MW-154 05/07/15 < 15 < 10 < 1 < 1 < 4 < 1 < 2 < 1 < 3 < 15 < 1 < 1 < 21 < 5 MW-154 08/26/15 < 16 < 34 < 2 < 2 < 4 < 2 < 3 < 2 < 3 < 14 < 1 < 2 < 21 < 7 MW-154 10/25/15 < 13 < 14 < 1 < 1 < 3 < 1 < 3 < 2 < 3 < 6 < 1 < 1 < 11 < 4 MW-155 03/12/15 < 6 < 5 < 1 < 1 < 1 < 0 < 1 < 1 < 1 < 10 < 1 < 1 < 12 < 3 MW-155 05/07/15 < 16 < 42 < 2 < 2 < 4 < 1 < 3 < 2 < 3 < 14 < 1 < 1 < 22 < 6 BOLDED VALUES INDICATE LLD COULD NOT BE MET DUE TO AGE OF SAMPLE AT TIME OF RECEIPT AT LABORATORY

TABLE B-I.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 DATE MW-155 08/27/15 < 18 < 13 < 2 < 2 < 4 < 2 < 3 < 2 < 3 < 14 < 2 < 2 < 22 < 5 MW-155 10/25/15 < 13 < 11 < 1 < 1 < 3 < 1 < 3 < 1 < 2 < 6 < 1 < 1 < 11 < 4 MW-158D 03/18/15 < 12 < 11 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 10 < 1 < 1 < 16 < 5 MW-158D 06/18/15 < 59 128 +/- 63 < 7 < 7 < 14 < 7 < 13 < 7 < 12 < 13 < 7 < 7 < 30 < 11 MW-159D 01/17/15 < 22 < 21 < 2 < 2 < 5 < 2 < 5 < 3 < 4 < 9 < 2 < 2 < 18 < 6 MW-159D 04/12/15 < 17 < 13 < 1 < 2 < 4 < 1 < 3 < 2 < 3 < 13 < 1 < 2 < 19 < 5 MW-159D 08/24/15 < 14 < 21 < 1 < 1 < 3 < 1 < 2 < 2 < 3 < 14 < 1 < 1 < 19 < 5 MW-159D 10/18/15 < 59 < 122 < 6 < 8 < 13 < 4 < 11 < 8 < 10 < 15 < 5 < 7 < 38 < 11 MW-162D 04/05/15 < 17 < 49 < 1 < 2 < 4 < 2 < 3 < 2 < 3 < 12 < 1 < 2 < 20 < 5 MW-2 05/07/15 < 14 < 26 < 1 < 1 < 3 < 1 < 2 < 2 < 2 < 14 < 1 < 1 < 21 < 6 MW-4 04/18/15 < 17 < 42 < 2 < 2 < 4 < 2 < 3 < 2 < 3 < 13 < 1 < 2 < 19 < 6 MW-5 04/05/15 < 19 < 32 < 2 < 2 < 4 < 2 < 4 < 2 < 4 < 14 < 2 < 2 < 21 < 6 B-7 MW-6 04/18/15 < 20 < 17 < 2 < 2 < 5 < 2 < 4 < 2 < 4 < 13 < 2 < 2 < 21 < 7 MW-7 04/18/15 < 16 < 29 < 1 < 2 < 4 < 2 < 3 < 2 < 3 < 12 < 1 < 1 < 18 < 6 MW-BW-201S 04/10/15 < 9 < 8 < 1 < 1 < 2 < 1 < 1 < 1 < 2 < 7 < 1 < 1 < 11 < 3 MW-BW-202S 04/10/15 < 13 < 8 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 11 < 1 < 1 < 15 < 3 MW-BW-203S 04/10/15 < 14 154 +/- 27 < 1 < 2 < 4 < 1 < 3 < 2 < 3 < 12 < 1 < 1 < 17 < 7 MW-BW-207I 05/07/15 < 14 < 11 < 1 < 1 < 4 < 1 < 3 < 2 < 3 < 15 < 1 < 1 < 18 < 7 MW-P2D 06/17/15 < 49 < 75 < 7 < 6 < 11 < 5 < 10 < 7 < 10 < 11 < 5 < 6 < 28 < 8 P-2D 03/18/15 < 13 < 8 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 12 < 1 < 1 < 18 < 4 RW-10 05/06/15 < 10 62 +/- 32 < 1 < 1 < 3 < 1 < 2 < 2 < 2 < 13 < 1 < 1 < 17 < 5 RW-5 06/24/15 < 17 < 30 < 1 < 2 < 4 < 1 < 3 < 2 < 3 < 14 < 1 < 2 < 20 < 6 RW-6 04/12/15 < 15 < 16 < 1 < 2 < 4 < 1 < 3 < 2 < 3 < 11 < 1 < 1 < 17 < 6 RW-7 04/12/15 < 16 < 14 < 1 < 2 < 3 < 2 < 3 < 2 < 3 < 11 < 1 < 1 < 17 < 5 RW-9 04/11/15 < 14 < 42 < 1 < 2 < 3 < 1 < 2 < 2 < 3 < 11 < 1 < 1 < 16 < 5 BOLDED VALUES INDICATE LLD COULD NOT BE MET DUE TO AGE OF SAMPLE AT TIME OF RECEIPT AT LABORATORY

TABLE B-I.3 CONCENTRATIONS OF HARD TO DETECTS IN GROUNDWATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Am-241 Cm-242 Cm-243/244 Pu-238 Pu-239/240 U-234 U-235 U-238 Fe-55 Ni-63 DATE MW-103 09/09/15 < 0.1 < 0.1 < 0.2 < 0.2 < 0.1 0.4 +/- 0.3 < 0.1 0.5 +/- 0.3 B-8

TABLE B-II.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA, AND GROSS BETA IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis) Gr-A (Sus) Gr-B (Dis) Gr-B (Sus)

SW-05 01/20/15 < 173 SW-05 04/08/15 Original < 170 SW-05 04/08/15 Recount < 186 SW-102 03/11/15 289 +/- 128 SW-102 04/11/15 175 +/- 112 < 4.4 < 0.7 < 1.3 < 0.8 4.6 +/- 1.0 < 1.9 B-9

TABLE B-II.2 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2015 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Be-7 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 DATE SW-102 04/11/15 < 14 < 24 < 1 < 1 < 3 < 1 < 2 < 2 < 3 < 11 < 1 < 1 < 16 < 5 B-10