Text

Submittal of 2011 Annual Radiological Environmental Operating Report
	ML12137A304
Person / Time
Site:	Braidwood
Issue date:	05/14/2012
From:	Enright D; Exelon Generation Co, Exelon Nuclear
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	BW120048
	Download: ML12137A304 (255)
	v • d • e

Exelon Generation Company, LLC www.exeloncorp.com Exelkn.

Braidwood Station Nucear 35100 South Rt 53, Suite 84 Braceville, IL60407-9619 May 14, 2012 BW120048 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555-0001 Braidwood Station, Units 1 and 2 Facility Operating License Nos. NPF-72 and NPF-77 NRC Docket Nos. STN 50-456 and STN 50-457

Subject:

2011 Annual Radiological Environmental Operating Report Attached is the 2011 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, and IV.B.3. 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 Chris VanDenburgh, Regulatory Assurance Manager, at (815) 417-2800.

Respectfully, Daniel J. Enrigh Site Vice President Braidwood Station cc: US NRC Regional Administrator, Region III 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 2011 Prepared By Teledyne Brown Engineering Environmental Services Exelkn..

Nuclear Braidwood Station Braceville, IL 60407 May 2012

Intentionally left blank Table Of Contents I. Sum m ary and Conclusions .............................................................................................. 1 I1. Introduction ............................................................................................................. 3 A. Objectives of the REM P .................................................................................. 3 B. Implem entation of the Objectives .................................................................. 3 Ill. Program Description ................................................................................................ 3 A. Sam ple Collection ......................................................................................... 3 B. Sam ple Analysis ............................................................................................ 5 C. Data Interpretation ......................................................................................... 6 D. Program Exceptions ....................................................................................... 7 E. Program Changes ......................................................................................... 10 IV. Results and Discussion ......................................................................................... 10 A. Aquatic Environm ent ..................................................................................... 10

1. Surface Water ..................................................................................... 10

2. Public W ater ....................................................................................... 11

3. Ground/well Water .............................................................................. 11 4 . Fish ................................................................................................... .. 12

5. Sedim ent ............................................................................................ 12 B. Atm ospheric Environm ent ........................................................................... 13

1. Airborne .............................................................................................. 13

a. Air Particulates ......................................................................... 13

b. Airborne Iodine ...................................................................... 14 C. Terrestrial ..................................................................................................... 14

1. Milk .................................................................................................... .. 14

2. Food Products .................................................................................... 14 D. Am bient Gam m a Radiation ......................................................................... 15 E. Land Use Survey .......................................................................................... 15 F. Summary of Results - Inter-laboratory Comparison Program ..................... 16

Appendices Appendix A Radiological Environmental Monitoring Report Annual Summary Tables Table A-1 Radiological Environmental Monitoring Program Annual Summary for Braidwood Station, 2011 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, 2011 Table B-2 Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Braidwood Station, 2011 Fi qures Figure B-1 Inner Ring TLD Locations of the Braidwood Station, 2011 Figure B-2 Fixed Air Sampling and Outer Ring TLD Locations of the Braidwood Station, 2011 Figure B-3 Ingestion and Waterborne Exposure Pathway Sample Locations of the Braidwood Station, 2011 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, 2011.

Table C-1.2 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2011.

Table C-1.3 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2011.

Table C-11.1 Concentrations of Gross Beta in Public Water Samples Collected in the Vicinity of Braidwood Station, 2011.

Table C-11.2 Concentrations of Tritium in Public Water Samples Collected in the Vicinity of Braidwood Station, 2011.

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Table C-11.3 Concentrations of 1-131 in Public Water Samples Collected in the Vicinity of Braidwood Station, 2011.

Table C-11.4 Concentrations of Gamma Emitters in Public Water Samples Collected in the Vicinity of Braidwood Station, 2011.

Table C-111.1 Concentrations of Tritium in Ground/Well Water Samples Collected in the Vicinity of Braidwood Station, 2011.

Table C-111.2 Concentrations of Gamma Emitters in Ground/Well Water Samples Collected in the Vicinity of Braidwood Station, 2011.

Table C-IV.1 Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of Braidwood Station, 2011.

Table C-V.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Braidwood Station, 2011.

Table C-VI.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Braidwood Station, 2011.

Table C-VI.2 Monthly and Yearly Mean Values of Gross Beta Concentrations in Air Particulate Samples Collected in the Vicinity of Braidwood Station, 2011.

Table C-VI.3 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Braidwood Station, 2011.

Table C-VII.1 Concentrations of 1-131 in Air Iodine Samples Collected in the Vicinity of Braidwood Station, 2011.

Table C-VIII.1 Concentrations of 1-131 in Milk Samples Collected in the Vicinity of Braidwood Station, 2011.

Table C-VIII.2 Concentrations of Gamma Emitters in Milk Samples Collected in the Vicinity of Braidwood Station, 2011.

Table C-IX.1 Concentrations of Gamma Emitters in Vegetation Samples Collected in the Vicinity of Braidwood Station, 2011.

Table C-X.1 Quarterly TLD Results for Braidwood Station, 2011.

Table C-X.2 Mean Quarterly TLD Results for the Inner Ring, Outer Ring, Other, and Control Locations for Braidwood Station, 2011.

Table C-X.3 Summary of the Ambient Dosimetry Program for Braidwood Station, 2011.

Figures Figure C-1 Surface Water - Gross Beta - Stations BD-10 and BD-25 (C) Collected in the Vicinity of Braidwood Station, 2000 - 2011.

Figure C-2 Surface Water - Gross Beta - Stations BD-38 and BD-40 Collected in the Vicinity of Braidwood Station, 2007 - 2011.

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Figure C-3 Surface Water - Gross Beta - Stations BD-55 and BD-56 Collected in the Vicinity of Braidwood Station, 2007 - 2011.

Figure C-4 Surface Water - Tritium - Stations BD-1 0 and BD-25 (C) Collected in the Vicinity of Braidwood Station, 2000 - 2011.

Figure C-5 Surface Water - Tritium - Stations BD-38 and BD-40 Collected in the Vicinity of Braidwood Station, 2006 - 2011.

Figure C-6 Surface Water - Tritium - Stations BD-55 and BD-56 Collected in the Vicinity of Braidwood Station, 2007 - 2011.

Figure C-7 Public Water - Gross Beta - Station BD-22 Collected in the Vicinity of Braidwood Station, 2000 - 2011.

Figure C-8 Public Water - Tritium - Station BD-22 Collected in the Vicinity of Braidwood Station, 2000 - 2011.

Figure C-9 Ground/Well Water - Tritium - Stations BD-1 3 and BD-34 Collected in the Vicinity of Braidwood Station, 2000 - 2011.

Figure C-10 Ground/Well Water - Tritium - Stations BD-35 and BD-36 Collected in the Vicinity of Braidwood Station, 2000 - 2011.

Figure C-11 Ground/Well Water - Tritium - Station BD-37 Collected in the Vicinity of Braidwood Station, 2000 - 2011.

Figure C-12 Ground/Well Water - Tritium - Stations BD-50 and BD-51 Collected in the Vicinity of Braidwood Station, 2007 - 2011.

Figure C-13 Ground/Well Water - Tritium - Stations BD-53 and BD-54 Collected in the Vicinity of Braidwood Station, 2007 - 2011.

Figure C-14 Air Particulate - Gross Beta - Stations BD-03 (C) and BD-06 Collected in the Vicinity of Braidwood Station, 2000 - 2011.

Figure C-15 Air Particulate - Gross Beta - Stations BD-19 and BD-20 Collected in the Vicinity of Braidwood Station, 2000 - 2011.

Figure C-16 Air Particulate - Gross Beta - Station BD-21 Collected in the Vicinity of Braidwood Station, 2000 - 2011.

Figure C-17 Air Particulate - Gross Beta - Stations BD-02 and BD-04 Collected in the Vicinity of Braidwood Station, 2005 - 2011.

Figure C-18 Air Particulate - Gross Beta - Station BD-05 Collected in the Vicinity of Braidwood Station, 2005 - 2011.

Appendix D Inter-Laboratory Comparison Program Tables Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2011 iv

Table D-2 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2011 Table D-3 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering, 2011 Table D-4 ERA Statistical Summary Proficiency Testing Program for Environmental, Inc., 2011 Table D-5 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Environmental, Inc., 2011 Appendix E Effluent Data Appendix F Meteorological Data Appendix G Annual Radiological Groundwater Protection Program Report (ARGPPR) v

I. Summary and Conclusions This report on the Radiological Environmental Monitoring Program (REMP) conducted for Exelon's Braidwood Station covers the period January 1, 2011 through December 31, 2011. During that time period, 1,565 analyses were performed on 1,334 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.

On March 11, 2011 an earthquake off the Japanese islands produced a massive tsunami that caused a nuclear accident at four of the six Fukushima Daiichi reactors. In planning for the potential radioactive plume reaching the United States, Exelon Nuclear increased the sampling frequency and added additional analyses of select media from pathways that were expected to be the most sensitive to any increase in ambient radiation levels. Low level 1-131 analyses and gamma spectroscopy analyses were performed on air particulates, air iodine, and milk, as appropriate.

The resulting radioactive plume was first detected in the environs of Braidwood Station on March 17, 2011. The final date of positive detection was April 7, 2011. The radionuclide identified was lodine-131. Maximum activity levels found by media were 111 E-3 pCi/m 3 for air iodine and 0.8 pCi/L for milk.

Samples collected were compared to offsite control locations to verify that these positive detections were not attributable to licensed activities. All other radionuclides analyzed were below the MDC (Minimum Detectable Concentration).

The radioactive half-life of 1-131 is about 8 days. This short half-life allowed the affects of this radioactive plume to subside over about 3 weeks. As of April 8, 2011 no further impacts from the Fukushima Daiichi accident were evident.

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. No fission or activation products were detected. Gross beta and tritium activities detected were consistent with those detected in previous years.

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. Two sediment samples had Cesium-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 1-131 analyses were performed on weekly air samples. All 1

results were less than the minimum detectable concentration with the exception of 20 samples which were positive for 1-131. These positive results are directly attributed to the Fukushima event in March of 2011.

Cow milk samples were analyzed for concentrations of 1-131 and gamma emitting nuclides. Iodine-1 31 was detected in one sample after the Fukushima event at a level just above the MDC. The positive 1-131 result is directly attributed to the Fukushima accident. Concentrations of naturally occurring K-40 were also 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 thermoluminescent dosimeters (TLD). Levels detected were consistent with those observed in previous years.

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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), Mirion Technologies, and Environmental Inc. (Midwest Labs) on samples collected during the period January 1, 2011 through December 31, 2011.

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.

Ill. 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 2011.

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 two weekly composite samples of public drinking water at location (BD-22), and ground/well water samples collected quarterly from nine locations (BD-13, BD-34, BD-35, BD-36, BD-37, BD-50, BD-51, BD-53 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, smallmouth bass, golden redhorse, silver redhorse, channel catfish 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 two locations semiannually, BD-10 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 two locations (BD-17 and BD-18) from March through October, and monthly from November through February. The control location was BD-18. 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. Various types of samples were collected and placed in new unused plastic bags, and sent to the laboratory for analysis.

Ambient Gamma Radiation Direct radiation measurements were made using dual calcium fluoride and lithium flouride thermoluminescent dosimeters (TLD). Each location consisted of 2 TLD sets. The TLDs were exchanged quarterly and sent to Mirion Technologies for analysis. The TLDs 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-1 12, BD-1 13a, BD-1 14, BD-1 15 and BD-1 16) 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, B13-209, BD-210, BD-211, BD-212, BD-213, BD-214, BD-215, 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 TLD 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, 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 2011. 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 1-131 in air, milk, and public water.

5. 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 an a postoridetermination.

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, public, ground/well water, and fish 12 nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, 1-131, Cs-134, Cs-137, Ba-140, and La-140 were reported.

For 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 single analysis uncertainty.

D. Program Exceptions For 2011 the Braidwood Station REMP had a sample recovery rate in excess of 98.4%. 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-53 01/13/11 No sample; Homeowner was away, sample obtained on 01/20/11.

WW BD-50 01/27/11 No sample; Homeowner was away, sample obtained on 02/03/11.

A/I BD-04 02/24/11 No apparent reason for low reading of 170.4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months .

A/I BD-1 9 02/24/11 No apparent reason for low reading of 169.2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

Table D-1 LISTING OF SAMPLE ANOMALIES (continued)

Sample Location Collection Reason Type Code Date WW BD-51 03/10/11 No sample; Homeowner was away, sample obtained on 03/17/11.

WW BD-35 03/24/11 No sample; Homeowner was away, sample obtained on 03/31/11.

WW BD-13 04/14/11 Sample taken from well #4; usual sampling well under repair.

A/I BD-02 08/04/11 No apparent reason for low reading of 166.6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

A/I BD-06 10/27/11 No apparent reason for low reading of 160.7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months .

A/I BD-06 11/03/11 No apparent reason for low reading of 166.3 hours3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months .

A/I BD-06 11/10/11 No apparent reason for low reading of 162.0 hours0 days 0 hours 0 weeks 0 months .

A/I BD-20 11/10/11 No apparent reason for low reading of 115.7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months .

A/I BD-06 11/16/11 No apparent reason for low reading of 137.1 hours1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months .

A/I BD-20 11/23/11 Timer reading of 169.0 hours0 days 0 hours 0 weeks 0 months estimated, timer replaced.

A/I BD-06 12/01/11 No apparent reason for low reading of 183.1 (8-day run) hours.

A/I BD-06 12/08/11 No apparent reason for low reading of 148.3 hours3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months ; collector wired second timer directly to pump to investigate consistently low readings.

A/I BD-20 12/08/11 No apparent reason for low reading of 144.7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months .

Table D-1 LISTING OF SAMPLE ANOMALIES (continued)

Sample Location Collection Reason Type Code Date A/I BD-20 12/15/11 No apparent reason for low reading of 124.6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months ; collector placed second timer to investigate low reading.

Table D-2 LISTING OF MISSED SAMPLES Sample Location Collection Reason Type Code Date WT BD-38, BD-55, 01/06/11 No sample, water frozen.

BD-56 WT BD-38, BD-55, 01/13/11 No sample, water frozen.

BD-56 WT BD-38, BD-55, 01/20/11 No sample, water frozen.

BD-56 WT BD-38, BD-55, 01/27/11 No sample, water frozen.

BD-56 WT BD-38, BD-55, 02/03/11 No sample, water frozen.

BD-56 WT BD-38, BD-55, 02/10/11 No sample, water frozen.

BD-56 TLD BD-214-2 06/30/11 TLD missing in field.

WG BD-53 07/14/11 No sample; house torn down; property vacant.

WG BD-53 10/14/11 No sample; house torn down; property vacant.

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 Starting in November of 2011, 1-131 is now being analyzed in drinking water by the low level method to detect down to 1 pCi/L.

Well water location BD-53 is no longer being sampled due to the house being demolished. The well has been capped and sealed in accordance with Will County Regulations. The property is no longer a private residence as it is owned by Exelon.

IV. Results and Discussion A. Aquatic Environment

1. Surface Water Samples were taken weekly and composited monthly at six locations (BD-10, BD-25, BD-38, BD-40, BD-55 and BD-56). Of these locations, only BD-10 could be affected by Braidwood Station's 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 61 of 69 samples. The values ranged from 2.7 to 13.4 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-1.2, Appendix C). Tritium activity was not detected in any samples at a concentration above 200 pCi/I (Figures C-4 through C-6, Appendix C).

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides (Table C-1.3, 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 Station's effluent releases. The following analyses were performed:

Gross Beta Samples from the location were analyzed for concentrations of gross beta (Tables C-I1.1, Appendix C). Gross beta was detected in nine of 12 samples. The values ranged from 2.3 to 5.7 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-11.2, Appendix C). Tritium was detected in one of 12 samples at a concentration of 309 pCi/L.

Concentrations detected were consistent with those detected in previous years (Figure C-8, Appendix C).

Iodine Starting in November, monthly composites of weekly samples from the location were analyzed for 1-131 (Table C-11.3, 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 nine locations (BD-13, BD-34, BD-35, BD-36, BD-37, BD-50, BD-51, BD-53 and BD-54). The following analyses were performed:

Tritium Quarterly grab samples from the locations were analyzed for tritium activity (Table C-111.1, Appendix C). Tritium was detected in one of 34 samples at a concentration of 225 pCi/L. The concentration detected was consistent with those detected in previous years (Figures C-9 through C-13, Appendix C).

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides (Table C-111.2, Appendix C). No nuclides were detected, and all required LLDs were met.

4. Fish Fish samples comprised of largemouth bass, smallmouth bass, golden redhorse, silver redhorse, channel catfish and common carp were collected at three locations (BD-25, BD-28, and BD-41) semiannually. Location BD-28 could be affected by Braidwood Station's 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 two locations (BD-10 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 Station's 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-1 37 were found at locations BD-10 and BD-57. The concentration ranged from 84 to 117 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-1 9, 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 I) ranged from 8 to 42 E-3 pCi/m 3 with a mean of 21 E-3 pCi/m . The results from the far field (Group II) ranged from 7 to 40 E-3 pCi/m 3 with a mean of 21 E-3 pCi/m 3 . The results from the Control location (Group Ill) ranged from 6 to 41 E-3 pCi/m 3 with a mean of 20 E-3 pCi/m 3 . Comparison of the 2011 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 2011 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.

Additionally, air particulate samples from BD-03 (control) were analyzed weekly during the Fukushima accident. 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 1-131 (Table C-VII.1, Appendix C). All results were less than the minimum detectable concentration with the exception of 20 samples which were positive for 1-131. These positive results are directly attributed to the Fukushima event in March of 2011.

C. Terrestrial Environment

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

Iodine-1 31 Milk samples from both locations were analyzed for concentrations of 1-131 (Table C-VIII.1, Appendix C).

Iodine-1 31 was detected in one sample at location BD-17 after the Fukushima event at a level just above the MDC.

This positive result is directly attributed to the Fukushima event. 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 downstream, BD-Quad 1, BD-Quad 2, BD-Quad 3 and BD-Quad 4) could be affected by Braidwood Station's effluent releases. 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 dual element calcium fluoride and lithium fluoride thermoluminescent dosimeters (TLD).

Eighty TLD locations were established around the site. Results of TLD measurements are listed in Tables C-X.1 to C-X.3, Appendix C.

Most TLD measurements were below 30 mR/quarter, with a range of 17 to 30 mR/quarter with the exception of the first quarter TLDs. 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 2011 around the Braidwood Station was performed by Environmental Inc. (Midwest Labs) for Exelon Nuclear to comply with section 12.5.2 of the Braidwood Station's Offsite Dose Calculation Manual. The purpose of the survey was to document the nearest resident, milk producing animal and garden of greater than 500 ft2 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 11.2 (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 F. 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 DOE's 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 ERA's evaluation report provides an acceptance range for control and warning limits with associated flag values. ERA's acceptance limits are established per the USEPA, NELAC, State Specific PT program requirements or ERA's 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 MAPEP's 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 primary laboratory, 14 out of 18 analytes met the specified acceptance criteria. Four analytes did not meet the specified acceptance criteria for the following reason:

1. Teledyne Brown Engineering's Analytics March 2011 Cr-51 in milk result of 398 pCi/L was higher than the known value of 298 pCi/L, resulting in a found to known ratio of 1.34. NCR 11-13 was initiated to investigate this failure. There was a slightly high bias in all the gamma activities. The June gamma results in milk did not show a high bias. No further action was required.

2. Teledyne Brown Engineering's ERA May 2011 Gross Alpha in water result of 64.1 pCi/L was higher than the known value of 50.1 pCi/L, which exceeded the upper control limit of 62.9 pCi/L. NCR 11-08 was initiated to investigate this failure. The solids on the planchet exceeded 100 mg, which was beyond the range of the efficiency curve.

Teledyne Brown Engineering's MAPEP March 2011 Gross Alpha in air particulate result of 0.101 Bq/sample was lower than the known value of 0.659 Bq/sample, which exceeded the lower control limit of 0.198 Bq/sample. NCR 11-11 was initiated to investigate this failure. The air particulate filter was counted on the wrong side.

3. Teledyne Brown Engineering's ERA November 2011 Sr-89 in water result of 81.0 pCi/L was higher than the known value of 69.7 pCi/L, which exceeded the upper control limit of 77.9 pCi/L. NCR 11-16 was initiated to investigate this failure. The TBE reported value to known ratio of 1.16 fell within the acceptable range of +/- 20%, which TBE considers acceptable.

4. Teledyne Brown Engineering's MAPEP March 2011 Sr-90 in soil, air particulate, and vegetation results were not reported. MAPEP evaluates analytes not reported as failures. NCR 11-11 was initiated to investigate these failures.

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-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2011 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2011 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBEROF REQUIRED MEAN (M) MEAN (M) MEAN(M) STATION# NUMBEROF 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 69 4 6.1 9.1 9.7 BD-40 INDICATOR 0 (PCI/LITER) (49/57) (12/12) (12/12) BRAIDWOOD STATION COOLING LAKE (2.7/13.4) (5.4/12.8) (3.5/13.4) ONSITE H-3 24 200 <LLD ,LLD 0 GAMMA 69 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 NB-95 15 <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, 2011 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2011 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 ZR-95 30 <LLD <LLD (PCI/LITER) 1-131 15 <LLD <LLD CS-134 15 <LLD <LLD CS-137 18 <LLD <LLD BA-140 60 <LLD <LLD 0 LA- 40 15 <LLD <LLD 0 PUBLIC WATER GR-B 12 4 4.1 NA 4.1 BD-22 INDICATOR 0 (PCI/LITER) (9/12) (9/12) WILMINGTON (2.3/5-7) (2.3/5.7) 6.0 MILES NE OF SITE H-3 12 200 309 NA 309 BD-22 INDICATOR 0 (1/12) (1/12) WILMINGTON 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-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2011 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2011 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 1-131 2 <LLD NA 0 (PCI/LITER)

GAMMA 12 MN-54 15 <LLD NA 0 CO-58 15 <LLD NA 0 FE-59 30 <LLD 0 CO-60 15 <LLD NA 0 ZN-65 30 <LLD NA 0 NB-95 15 <LLD NA 0 ZR-95 30 <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-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2011 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2011 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBEROF 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 1-131 15 <LLD NA 0 (PCI/LITER)

CS-134 15 <LLD NA 0 CS-137 18 <LLD NA 0 BA-140 60 <LLD NA 0 LA- 140 15 <LLD NA 0 GROUND WATER H-3 34 200 225 NA 225 BD-36 INDICATOR 0 (PCI/LITER) (1/34) (1/4) HUTTON WELL 4.7 MILES E OF SITE GAMMA 34 MN-54 15 <LLD NA CO-58 15 <LLD NA

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-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2011 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2011 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 NB-95 15 <LLD NA 0 ZR-95 30 <LLD NA 0 1-131 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, 2011 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2011 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 (PCI/LITER)

LA-140 15 <LLD NA FISH GAMMA 12

(PCI/KG WET) 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 NB-95 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-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2011 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2011 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 ZR-95 NA <LLD <LLD 0 (PCI/KG WET) 1-131 NA <LLD <LLD 0 CS-134 130 <LLD <LLD 0 CS-137 150 <LLD <LLD 0 BA-140 NA <LLD <LLD 0 LA-140 NA <LLD <LLD 0 SEDIMENT GAMMA 4 (PCI/KG DRY) MN-54 NA <LLD NA 0 CO-58 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-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2011 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2011 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION f 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 FE-59 NA <LLD NA 0 (PCI/KG DRY)

CO-60 NA <LLD NA 0 ZN-65 NA <LLD NA 0 00 NB-95 NA <LLD NA 0 ZR-95 NA <LLD NA 0 CS-134 150 <LLD NA 0 CS-137 180 100 NA 117 BD-10 INDICATOR 0 (2/4) (1/2) KANKAKEE RIVER DOWNSTREAM (84/117) 5.4 MILES NE OF SITE BA-140 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-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2011 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2011 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 LA-140 NA <LLD NA 0 (PCIUKG DRY)

AIR PARTICULATE GR-B 416 10 21 20 21 BD-06 INDICATOR 0 (E-3 PCI/CU.METER) (362/364) (52/52) (51/52) GODLEY (7/42) (6/41) (9/42) 0.5 MILEW WSW 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 ZN-65 NA <LLD <LLD 0 NB-95 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-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2011 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2011 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 ZR-95 NA <LLD <LLD 0 (E-3 PCI/CU.METER)

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 416 (E-3 PCI/CU.METER) 1-131 70 65 51 76 BD-19 INDICATOR 0 (18/364) (2/52) (2/52) NEARSITE NW (28/111) (50/53) (67/85) 0.3 MILES NW OF SITE MILK 1-131 38 0.8 <LLD 0.8 BD-17 INDICATOR 0 (PCI/LITER) (1/19) (1/19) HALPIN'S DAIRY 5.5 MILES SSW OF SITE GAMMA 38 MN-54 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-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2011 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2011 INDICATOR CONTROL LOCATION WITH1HIGHEST 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 CO-58 NA <LLD <LLD 0 (PCI/LITER)

FE-59 NA <LLD <LLD 0 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 15 <LLD <LLD 0 CS-137 18 <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-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2011 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2011 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 BA-140 60 <LLD <LLD 0 (PCI/LITER)

LA-140 15 <LLD <LLD 0 VEGETATION GAMMA 10 (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 ZN-65 NA <LLD <LLD 0 NB-95 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-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BRAIDWOOD STATION, 2011 Name of Facility: BRAIDWOOD DOCKET NUMBER: 50-456 & 50-457 Location of Facility: BRACEVILLE, IL REPORTING PERIOD: ANNUAL 2011 INDICATOR CONTROL LOCATION WITH HIGIIEST 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 ZR-95 NA <LLD <LLD 0 (PCI/KG WET)

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 TLD-QUARTERLY 319 NA 21 21 25 BD-21 1-1 INDICATOR 0 (MILLI-ROENTGEN/QTR.) (311/311) (8/8) (4/4)

(17/30) (19/24) (23/27) 4.8 MILES SW

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

Intentionally left blank TABLE B-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Braidwood Station, 2011 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 SW 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. Drinkinq (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-53 Phelps Well (indicator) 0.7 miles E BD-54 Cash Well (indicator) 0.9 miles NE D. Milk - bi-weekly / monthly BD-17 Halpin's 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-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, 2011 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 mites NNW Control Gorman Farm 9.0 miles NE Environmental Dosimetry - TLD Site Boundary 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-1 16-1 0.4 miles NNW BD-1 16-2 0.5 miles NNW Intermediate Distance 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-i: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Braidwood Station, 2011 Location Location Description Distance & Direction From Site

1. Enviro nmental Dosimetry - TLD (cont'd)

Control BD-03-1 and -2 13000W. Road 6.2 miles ESE B-3

TABLE B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Braidwood Station, 2011 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.

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

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

Drinking Water Tritium Quarterly composite TBE, TBE-201 1 Tritium analysis in drinking water by liquid from weekly grab scintillation samples.

Drinking Water Iodine Weekly grab and TBE, TBE-2031 Radioactive Iodine in drinking water monthly composite from weekly grab 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 Gamma Spectroscopy Samples collected TBE-2007 Gamma emitting radioisotope analysis twice annually via electro-shocking or other techniques B-4

TABLE B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Braidwood Station, 2011 Sample Analysis Sampling Method Analytical Procedure Number Medium Air Particulates Gross Beta One-week composite TBE, TBE-2008 Gross Aipha 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 1-131 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.

TLD Thermoluminescence Quarterly TLDs Mirion Technologies Dosimetry comprised of two Mirion Technologies CaF 2 and LiF 2 elements.

B-5

11m=I, - ....Miles x TLD Locaioen Figure B-I Inner Ring TLD Locations of the Braidwood Station, 2011 B-6

1+

0 1l 2 3 4 I

Winl1 m TLDLocalbms

~AS~$np~Location Figure B-2 Fixed Air Sampling and Outer Ring TLD Locations of the Braidwood Station, 2011 B-7

QFFSIh DOS2- CALCULA11ON MANUAL BPFJdDWVOOD STATION 0 1 ~ 3 4 5 l...~I I I I I FIGURE 11-3 Miles IN4GESTION AND %?ATERBOPJWE XPOSURE P.AT1HVAY SAMPLE IfLCATIONS a Water 0Sediment Figure B-3 Ingestion and Waterborne Exposure Pathway Sample Locations of the Braidwood Station, 2011 B-8

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, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BD-10 BD-25 BD-38 BD-40 BD-55 BD-56 PERIOD U

01/06/11 - 01/27/11 4.6 +/- 2.6 11.0 + 3.6 (1) 3.5 + 2.1 (1) (1)

+- + 2.4 +-

02/17/11 - 02/24/11 5.1 +/- 1.9 8.0 +/-_2.1 3.7 2.0 (1) 8.1 < 2.0 (1) 7.9 1.9 (1)

-+/- +-

03/03/11 - 03/31/11 4.6 +/- 2.9 54 + 2.8 7.3 3.5 11.5 +/- 3.5 < 3.7 4.2 1.4 04/07/11 - 04/28/11 3.9 +/- 2.5 8.1 +/- 3.0 < 4.0 10.3 + 3.0 2.8 +/- 1.9 < 3.0 05/05/11 - 05/26/11 4.7 +/- 2.6 9.7 +/- 3.2 6.5 + 3.1 9.0 + 3.2 4.2 + 2.6 4.2 + 2.7 06/02/11 - 06/30/11 5.4 +/- 2.5 11.1 + 2.9 10.3 _+3.0 11.0 + 3.0 6.4 +/- 2.4 6.2 + 2.5 07/07/11 - 07/28/11 3.6 +/- 2.0 12.8 + 2.8 4.4 + 2.6 8.3 + 2.5 4.1 +/--1.6 3.3 +- 1.9 08/04/11 - 08/25/11 4.9 +/- 2.6 8.0 + 2.8 < 3.3 10.5 + 3.2 3.7 + 2.3 < 3.8 09/01/11 - 09/29/11 5.7 +/- 1.5 9.5 + 1.5 4.6 +/- 1.6 9.4 +/- 1.7 2.7 + 1.2 < 2.1

+

10/06/11 - 10/27/11 3.1 + 1.5 8.3 - 1.8 < 1.7 10.4 + 2.0 6.9 +/- 1.8 3.1 1.5 3.9 +/- 1.3 10.0 _ 1.8 8.7 +/- 1.9 13.4 + 2.0 4.0 +/- 1.2 4.6 +

11/031/11 - 11/23/11 1.3 12/01/11 - 12/29/11 5.0 + 1.4 6.7 + 1.6 5.7 +/- 1.6 10.8 +/- 1.9 3.2 +/- 1.1 6.1 +-

1.5 MEAN 4.5 +/- 1.5 9.1 +/- 4.1 6.4 +/- 4.6 9.7 +/- 4.8 4.2 +/- 3.0 4.9 +/- 3.3 TABLE C-I.2 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BD-10 BD-25 BD-38 BD-40 BD-55 BD-56 PERIOD U

01/06/11 - 03/31/11 < 173 < 172 175 (1) 173 < 175 (1) < 174 (1) 04/07/11 - 06/30/11

177

177 180 175 < 178 < 175 07/07/11 - 09129/11 < 191 < 192 189 193 < 190 < 196 10/06111 - 12/29/11 < 184 < 184 183 181 < 181 < 185 MEAN

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-1

TABLE C-1.3 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED INTHE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-10 01/06/11 - 01/27,/1 1 <2 <3 <6 <2 <6 <3 <5 < 14 <3 <3 < 27 <9 02/03/11 - 02/24,/11 <1 <1 <3 <1 <2 <2 <3

12 <1 <1 < 18 <5 03/03/11 - 03/31, /11 <2 <2 <6 <2 <4 <3 <4 <8 <2 <2 < 39 < 14 04/07/11 - 04/28,/11 <1 <2 <4 <1 <3 <2 <3 < 13 <1 <1 < 33 < 10 05/05/11 - 05/26./11 <1 <1 <2 <1 <1 <1 <2

13 <1 <1 < 18 <5 06/02/11 - 06/30. <3 <3 <7 <2 <5 <3 <5

14 <2 <2 < 27 <9 07/07/11 - 07/28* <4 <5 < 11 <5 <9 <5 <8 < 15 <5 <5

23 <6 08104/11 - 08/25 /11 <1 <1 <3 <1 <3 <2 <2 <7 <1 <1 < 12 <4 09/01/11 - 09/29,/11 <5 <5 < 15 <5 < 12 <7 <11 < 15 <5 <6 < 32 <9 10/06/11 - 10/27,/1 1 <2 <2 <5 <2 <3 <2 <3 <9 <2 <2 <16 <6 11/03/11 - 11/23./1 1 <1 <1 <2 <1 <2 <1 <2 < 13 <1 <1 <17 <5 12/01/11 - 12/29./11 <2 <2 <4 <1 <3 <2 <3 <13 <1 <2 < 19 <6 MEAN BD-25 01/06/11 01/27/11 <2 <3 <6 <2 <5 <3 <5

14 <2 <8

- <3 < 24 02/03/11 - 02/24/11 <1 <1 <3 <1 <2 <2 <2 < 10 <1 <1 <16 <6 03/03/11 - 03/31/11 <2 <2 <6 <2 <4 <3 <5 <9 <2 <2 < 47 < 13 04/07/11 - 04/28/11 <1 <1 <3 <1 <2 <1 <2

10 <1 <1 < 28 <9 05/05/11 - 05/26/11 <1 <1 <2 <1 <1 <1 <2 < 13 <1 <1 *15 <5 06/02/11 06/30/11 <1 <1 <3 <1 <3 <2 <3 <8 <1 <1

- < 15 <5 07/07/11 - 07/28/11 <5 <4 <9 <4 <11 <5 <7 < 15 <5 <5 < 33 <8 08/04/11 - 08/25/11 <2 <2 <4 <2 <3 <2 <3 <9 <2 <2 *17 <6 09/01/11 - 09/29/11 <6 <6 < 14 <8 < 12 <8 <11

14 <5 <5

38 < 15 10/06/11 - 10/27/11 <2 <2 <6 <3 <5 <2 <4

10 <2 <2 < 18 <5 11/03/11 - 11/23/11 <1 <1 <2 <1 <2 <1 <2 < 15 <1 <1 < 16 <6 12/01/11 - 12/29/11 <1 <2 <4 <1 <3 <2 <3 <11 <1 <1 <17 <5 MEAN

TABLE C-l.3 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-38 01/06/11 - 01/27//11 (1) 02/17/11 - 02/24//11 (1) <1 <1 <3 <1 <2 <2 <3 < 12 <1 <1 17 <5

/11 <1 <2 <4 <1 <3 <2 <3 <8 <1 <1 31 *10 03/03/11 - 03/31/

04/07/11 - 04/28//11 <1 <2 <5 <1 <3 <2 <3 < 10 <1 <1 37 *12 05/05/11 - 05/26//11 <2 <2 <4 <1 <3 <2 <3 <4 <2 <1 31 <8 06/02/11 - 06/301/11 <2 <2 <4 <2 <3 <2 <3

12 <1 <2 19 <6 07/07/11 - 07/28 /11 <5 <5 <10 <4 < 10 <5 < 10

15 <5 <6 33 <11 08104/11 - 08/25 /11 <2 <2 <4 <2 <4 <2 <3

10 <2 <2 17 <5 09/01/11 - 09/29 /11 <4 <6 <13 <6 <9 <5 <9

15 <4 <5 32 <12 10/06/11 - 10/27 /11 <2 <2 <5 <2 <3 <2 <4 *10 <2 <2 18 <6 11/03/11 - 11/23 '11 <1 <1 <2 <1 <1 <1 <1 <14 <1 <1 14 <5 12/01/11 - 12/29 '11 <2 <2 <4 <2 <3 <2 <3 *15 <2 <2 23 <6 MEAN BD-40 01/06/11 - 01/27/11 <2 <3 <6 <2 <5 <3 <5 13 <2 <3

24 <8 02/03/11 - 02/24/11 <1 <2 <4 <1 <3 <2 <3 14 <1 <1

20 <6 03/03/11 - 03/31/11 <1 <2 <4 <1 <3 <2 <3 11 <1 <1 < 35 <10 04/07/11 - 04/28/11 <1 <2 <4 <1 <2 <2 <4 10 <1 <2

42 <11 05/05/11 - 05/26/11 <1 <1 <2 <1 <2 <1 <2 14 <1 <1 *18 <6 06/02/11 - 06/30/11 <2 <2 <5 <2 <3 <2 <3 14 <2 <2

20 <7 07/07/11 - 07/28/11 <5 <6 <9 <5 < 10 <6 <9 14 <5 <4 < 33 <8 08/04/11 - 08/25/11 <2 <2 <4 <2 <3 <2 <3 9 <2 <2 < 16 <6 09/01/11 - 09/29/11 <6 <5 <10 <6 <12 <6 < 10 15 <6 <5 < 31 <12 10/06/11 - 10/27/11 <2 <2 <6 <2 <5 <3 <5 10 <2 <2 < 20 <7 11123/11 <1 <1 <2 <1 <1 <1 <1 12 <1 <1 < 13 <4 11/03/11 -

12/01/11 - 12/29/11 <1 <1 <3 <1 <2 <2 <3 11 <1 <1 < 16 <5 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION

TABLE C-1.3 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-55 01/06/11 - 01/27//11 (1)

/i11 (1) <1 <1 <1 02/17/11 - 02124/ <1 <1 <4 <3 <2 <3 <13 21 <5

/i11 <5 <1 <1 <1 03/03/11 - 03/31/ <1 <2 <3 <2 <4 <8 36 < 11

/11 <2 <1 <11 04/07/11 - 04/28/ <1 <4 <1 <2 <2 <3 <11 <1 32

/11 <1 <1 <1 <1 <1 <1 05/05/11 - 05/26/ <3 <2 <2 <15 19 <5 06/02/11 - 06/30//11 <2 <2 <6 <2 <5 <3 <5

14 <2 <2 24 <8 07/07/11 - 07/28//11 <3 <4 <8 <3 <7 <3 <6 <11 <4 <3 24 <8 08/04/11 - 08/25//11 <2 <2 <6 <2 <5 <3 <5

10 <2 <2 21 <8 09/01/11 - 09/29//11 <5 <6 <13 <5 < 15 <7 <12

14 <5 <6 29 <11 10/06/11 - 10/27//11 <2 <2 <4 <2 <3 <2 <3 <8 <2 <2 16 <5 11/03/11 - 11/23/'11 <1 <1 <2 <1 <1 <1 <2

14 <1 <1 16 <5 12/01/11 - 12/29//11 <1 <2 <4 <1 <3 <2 <3

15 <1 <1 22 <7 C)

MEAN BD-56 01/06111 - 01/27/11 (1) 02/17/11 02/24/11 (1) <1 <2 <4 <1 <3 <3 < 15 <1 <1

- <2

21 <7 03/03/11 - 03/31/11 <2 <2 <6 <2 <4 <3 <5 <11 <2 <2 < 46 *14 04/07/11 - 04/28/11 <2 <2 <5 <1 <3 <2 <4 <10 <1 <1 < 47 *13 05/05/11 - 05/26/11 <1 <1 <3 <1 <2 <1 <2 <13 <1 <1 *18 <5 06/02/11 - 06/30/11 <2 <2 <4 <2 <3 <2 <3 <14 <1 <2

21 <7 07/07/11 - 07/28/11 <4 <4 <9 <4 <9 <5 <7 <14 <4 <4

29 < 10 08/04/11 - 08/25/11 <2 <2 <4 <2 <4 <2 <4 <11 <2 <2 <19 <6 09/01/11 - 09/29/11 <5 <4 <9 <5 <9 <6 <8 < 14 <5 <5

29 < 11 10/06/11 - 10/27/11 <2 <2 <4 <2 <4 <2 <3 <9 <2 <2 <18 <6 11/03/11 - 11/23/11 <1 <1 <2 <1 <1 <1 <1 < 14 <1 <1 <16 <6 12/01/11 - 12/29/11 <1 <1 <3 <1 <2 <1 <2 <11 <1 <1 <15 <5 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION

TABLE C-I1.1 CONCENTRATIONS OF GROSS BETA IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BD-22 PERIOD 1ZI3UI1U U0IU2I0 "1 4.I +/- 2.2 02/03/11 03/03/11 5.7 +/- 2.6 03/03/11 03/31/11 < 3.5 03/31/11 04/28/11 < 3.5 04/28/11 06/02/11 3.7 +/- 1.5 06/02/11 06/30/11 < 3.4 06/30/11 07/28/11 2.3 +/- 1.5 07/28/11 09/01/11 5.5 +/- 2.3 09/01/11 09/29/11 3.2 +/- 1.6 09/29/11 11/03/11 5.3 +/- 1.6 11/03/11 12/01/11 3.6 +/- 1.6 12/01/11 12/29/11 3.4 +/- 1.1 MEAN 4.1 +/- 2.4 TABLE C-II.2 CONCENTRATIONS OF TRITIUM IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BD-22 PERIOD N

12/30/10 - 02/03/11 < 181 02/03/11 03/03/11 < 177 03/03/11 - 03/31/11 < 191 03/31/11 - 04/28/11 < 192 04/28/11 - 06/02/11 < 169 06/02/11 - 06/30/11 < 170 06/30/11 - 07/28/11 < 185 07/28/11 - 09/01/11 < 185 09/01/11 - 09/29/11 < 186 09/29/11 - 11/03/11 309 +/- 133 11/03/11 - 12/01/11 < 183 12/01/11 -12/29/11 < 156 MEAN TABLE C-II.3 CONCENTRATIONS OF 1-131 IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BD-22 PERIOD 11/03/11 - 12/21/11 I <

k I 12/01/11 -12/29/11 < 0.4 MEAN THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM CHANGES SECTION FOR EXPLANATION C-5

TABLE C-II.4 CONCENTRATIONS OF GAMMA EMITTERS IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-22 12/30/10 02/03/11 <2 <2 <4 <2 <4 <2 <4 <11 <2 <2 <18 <6 02/03111 03/03/11 <1 <1 <2 <1 <2 <1 <2 < 14 <1 <1 < 17 <4 03/03/11 03/31/11 <1 <1 <3 <1 <2 <1 <2 <9 <1 <1 < 22 <7 03/31/11 04/28/11 <1 <1 <2 <1 <1 <1 <1

15 <1 <1 <15 <5 04/28/11 06/02/11 <1 <1 <2 <1 <2 <1 <2 < 12 <1 <1 < 14 <4 06/02111 06/30/11 <3 <3 <7 <4 <7 <4 <7 < 10 <3 <4 < 23 <6 06/30/11 07128/11 <1 <2 <3 <1 <3 <2 <3 <14 <1 <1 < 19 <6 07/28/11 09/01/11 <1 <1 <2 <1 <2 <1 <2 <7 <1 <1 < 11 <3 09/01/11 09/29/11 <1 <1 <2 <1 <2 <1 <2 < 14 <1 <1

20 <7 09/29/11 11/03/11 <1 <2 <4 <1 <2 <1 <3 < 11 <1 <1 < 16 <5 11/03/11 12/01/11 <4 <4 <9 <3 <8 <5 <7 <14 <4 <4 < 26 <8 12/01/11 12/29/11 <4 <4 <8 <5 <9 <5 <8 <14 <4 <5 < 37 < 12 MEAN

TABLE C-II1.1 CONCENTRATIONS OF TRITIUM IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BD-13 BD-34 BD-35 BD-36 BD-37 BD-50 BD-51 BD-53 BD-54 PERIOD 01/20/11 - 03/31/11 < 154 < 154 < 181 (1) 225 +/- 105 < 153 < 155 (1) < 176 (1) 161 (1) < 155 04/15/11 - 04/15/11 < 177 (1) < 179 <1 78 < 180 < 175 < 178 < 180 180 < 178 07/15/11 - 07/15/11 < 187 < 186 < 183 < 186 < 191 < 192 < 195 (1) < 194 10114/111- 10/14/11 < 173 < 173 < 172 < 184 < 180 < 183 < 184 (1) < 184 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-7

TABLE C-111.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-13 01/13/11 - 01/13/11 <5 5 <11 <5 <8 <5 <8 <14 <4 <5 < 31 < 12 04/14/11 - 04/14/11 (1) < 2 2 <5 <2 <4 <2 <4 <13 <2 <2 <21 <7 07/15/11 - 07/15/11 <5 6 <12 <6 <10 <6 <9 <12 <5 <5 < 27 < 11 10/13/11 - 10/13/11 <3 3 <6 <2 <6 <4 <9 <3

<5 <3 <15 <6 MEAN BU-34 01/14/11 - 01/14/11 <5 5 10 <5 <8 <5 <8 <15 <4 <5 < 33 < 10 04/15/11 - 04/15/11 <1 2 4 <1 <3 <2 <3 <11 <1 <2 <17 <5 07/15/11 - 07/15/11 <4 6 9 <5 <12 <5 <9 <11 <4 <5 <24 <9 10/14/11 - 10/14/11 <4 3 9 <4 <6 <4 <6 <9 <3 <4 <23 <7 MEAN BD-35 03/31/11 - 03/31/11 (1) < 2 <2 4 <2 <4 <2 <4 <13 <2 <2 < 22 <7 04/15/11 - 04/15/11 <2 <2 5 <2 <4 <2 <4 <14 <2 <2 <21 <7 C) 07/15/11 - 07/15/11 <5 <4 10 <5 <10 <5 <6 <10 <5 <5 <31 <8 10/14/11 - 10/14/11 <2 <3 9 <3 <6 <4 <7 <7 <3 <3 <21 <6 MEAN B0-36 01/14/11 - 01/14/11 <4 5 10 <5 <10 <6 <9 <14 <4 <5 < 38 < 14 04/15/11 - 04/15/11 <2 2 5 <2 <4 <2 <4 <13 <2 <2 <22 <7 07/15/11 - 07/15111 <4 5 8 <5 <9 <6 <8 <10 <4 <5 <27 <8 10/14/11 - 10/14/11 <3 3 9 <4 <5 <4 <7 <9 <3 <4 <24 <6 MEAN BD-37 01/14/11 - 01/14/11 <4 4 < 10 < 4 <11 <5 <9 <14 <5 <5 <31 <9 04/15/11 - 04/15/11 <1 2 <4 < 1 <3 <2 <3 <10 <1 <2 <17 <5 07/15/11 - 07/15/11 <6 6 < 10 < 6 <12 <6 <10 <15 <6 <5 <35 < 11 10/14/11 - 10/14/11 <3 6 <9 < 5 <8 <3 <9 <12 <4 <4 <35 < 11 MEAN BD-50 02/03/11 - 02/03/11 (1) < 5 5 <8 4 <9 <6 <9 < 13 <4 <4 < 29 < 13 04/15/11 - 04/15/11 <2 2 <4 1 <3 <2 <3 < 14 <2 <2 22

< <6 07/15/11 - 07/15/11 <6 7 < 11 5 < 10 <6 < 11 < 12 <6 <7 < 31 < 11 10/14/11 - 10/14/11 <4 3 < 10 3 <7 <3 <6 < 11 <3 <4 < 15 <8 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION

TABLE C-111.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-51 03/17/11 - 03/17//11 (1) < 3 <4 <9 <3 <7 <4 <7 <14 <3 <4

29 <9

/i11 <1 04/15/11 - 04/15/ <2 <2 <4 <2 <3 <2 <3 <13 <2 < 20 <6

/i11 <8 <6 <5 <7 < 13 07/15/11 - 07/15/ <6 <6 < 12 <13 < 13 *13 < 38

/11 <3 <6 <5 <4 <9 10/14/11 - 10/141 <4 <8 <8 <5 < 10 < 10 < 22 MEAN BD-53 01/20/11 01/20/11 (1) < 3 <3 <8 <4 <8 <4 <6 <11 <4 <4 <26 <8 04/15/11 04/15/11 <2 <2 <4 <1 <3 <2 <3 <12 <1 <2 <19 <7 07/15/11 07/15/11 (1) -

10/14/11 10/14/11 (1) -

MEAN BD-54 01/14/11 01/14/11 <4 <4 <7 <4 <7 <4 <6 <12 <3 <4 < 25 <9 04/15/11 <1 <2 <4 <1 <3 <2 <3 < 12 <1 <1 *17 <5 04/15/11 07/15/11 07/15/11 < 11 < 10

20 < 10 < 18 <8 < 15 < 15 <7 <8

50 < 14 10/14/11 10/14/11 <6 <7 < 16 <6 *14 <8 <11 <12 <6 <7

31 < 12 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION

TABLE C-IV.1 CONCENTRATIONS OF GAMMA EMITTERS IN FISH SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 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 1-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD BD-25 Channel Catfish 05/11/11

85 < 74

205 < 82

150

90

171 < 1200 < 56

71 < 1450

312 Common Carp 05/11/11

61

65 < 149 < 51

121 < 63

122

929 < 58 < 54

900

336 Golden Redhorse 10/10/11 < 67 < 69

148

72

147

70

152

390 < 39 < 47 < 663 < 64 Smallmouth Bass 10/10/11 < 66 < 69

180 < 73 < 156

72 < 90 < 1010

58

80 < 865 < 340 MEAN BD-28 Channel Catfish 05/11/11 < 69 < 65

168 < 66 < 167 96

127

879 < 63 < 74 1340 < 373 Smallmouth Bass 05/11/11

83 < 105

251

69

198 96 < 140 < 1230 < 97 < 82 1590 < 501

0) Golden Redhorse 10/10/11 < 80 < 87 < 193 < 75

166 109

179

506 < 53 < 77 885 < 344 Silver Redhorse 10/10/11 < 97 < 75

182 < 75 < 156 85

147 < 574 < 80 < 62 945 < 260 MEAN BD-41 Channel Catfish 05/11/11

84 < 111

221 < 73 < 193 135

190 < 1310 < 75 < 77 1460 < 349 Largemouth Bass 05/11/11 < 75 < 95 < 191 < 77

164 101

200 < 1120 < 73 < 74 1520 < 491 Common Carp 10/11/11

64

70

168 < 67

133 74 < 129 - 467 < 61 < 68 654 < 181 Largemouth Bass 10/11/11

72

85

146

66

148 77 < 141 < 414 < 60 < 66 888 <84 MEAN

TABLE C-V.1 CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/KG DRY +/- 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-10 05/12/11 < 84 < 112 < 370 < 110 < 235 < 146 < 184 < 86 117 +/- 75 < 1770 < 537 10/14/11 < 83 < 83 < 229 < 104 < 208 < 120 < 183 < 74 < 133 < 908 < 235 MEAN BD-57 05/12/11 < 95 < 100 < 235 < 96 < 197 < 144 < 155 < 104 < 128 < 1670 < 538 10/14/11 < 62 < 71 < 211 < 83 < 185 < 110 < 133 <67 84 +/- 50 < 694 < 203 MEAN

TABLE C-VI.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION GROUP II GROUP II I GROUP III PERIOD BD-06 BD-19 U BD-20 BD-21 I BD-02 U BD-04 BD-05 BD-03 U 12/30/10 01/06111 34 +/- 5 35 +/- 6 37 +/- 6 GROUPI35 +/- 6 35 +/- 6 35 +/- 6 38 +/- 6 29 +/- 5 01/06/11 01/13/11 22 +/- 5 23 +/- 5 16 +/- 4 17 +/- 4 21 +/- 5 19 +/- 4 18 +/- 4 18 +/- 4 01/13111 01/20/11 26 +/- 4 29 +/- 4 24 +/- 4 25 +/- 4 20 +/- 4 27 +/- 4 23 +/- 4 25 +/- 4 01/20/11 01/27/11 37 +/- 6 34 +/- 6 29 +/- 5 35 +/- 6 30 +/- 5 39 +/- 6 38 +/- 6 34 +/- 6 01/27/11 02/03/11 19 5 20 +/- 5 20 +/- 5 25 +/- 6 25 +/- 6 20 +/- 5 17 +/- 5 19 +/- 5 02/03/11 02/10/11 23 +5 19 4 20 +/- 4 18 +/- 4 19+ 4 23 +/- 5 21 +/- 4 18 +/- 4 02/10/11 02/17/11 19 4 21 -+4 22 +/- 5 21 +/- 5 18 +/-+4 19 +/-+4 19 +4 21 +/- 4 02/17/11 02/24/11 11 __4 11 +/-+4 (1) 17 +/- 4 14 +/- 4 16+/- 4 14+ 4 (1) 9_4 13 +/- 4 02/24/11 03/03/11 22 +4 21 _+4 18 +/- 4 24 +/- 4 21 +/-+4 20 +/-+4 20 +/-+4 22 +/- 4 03/03/11 03/10/11 12 +/- 4 13+ 4 11 +/-4 14 +/- 4 14+ 4 14 +.4 14 +/-+4 14 +/- 4 03/10/11 03/17/11 17 +/- 4 22 +/-+4 19+/- 4 21 +/- 4 21 +/-+4 19+ 4 18 +/-+4 17 +/- 4 03/17/11 03/24/11 42 +/- 6 31 _+6 26 +/-5 31 +/- 6 29 +/-+6 27 +/-6 30 +/-+6 27 +/- 5 03/24/11 03/31/11 26 +/- 5 27 _+5 30 +/-5 24 +/- 5 34 +/-+5 29 +/-5 30 +/-+5 28 +/- 5 03131/11 04/07111 19 5 24 _+6 21 _+5 22 +/- 5 25 +/- 6 21 +/-5 20 +/-+5 24 +/- 6 04/07/11 04/14/11 13 4 12+ 4 17+/- 4 17 +/- 4 16 +/- 4 12 +/-+4 15 +/-4 13 +/- 4 04/14/11 04/21/11 12 5 8+/-4 12 +/-5 20 +/- 5 16 +/- 5 12+ 5 13 +/-5 11 +/-+5 04/21/11 04/28/11 9+/-4 9+/-4 10+/- 4 10 +/- 4 8+/-3 12+/- 4 8+/-4 11 +/-+4 04/28/11 05/05/11 12+ 4 14 5 14 +/-+5 14 +/- 5 16 +/-5 12 +/-+4 9+/-4 12 +/-+4 05/05/11 05/12/11 15+ 4 18+/- 4 20 +/-5 18 +/- 4 13 +4 15 +/-+4 15+ 4 14 +4 05/12/11 05/19/11 10 +4 10 +/- 4 11+ 4 14+ 5 14 +/-+5 12+/- 5 11 +/-+4 11 +/-+4 05/19/11 05/26/11 14+ 4 15 +/- 4 14 +/- 4 14+/- 4 14 +/-+4 18 +/-+4 14 +/-+4 7+/-3 05/26/11 06/02/11 15 +4 15 +/- 4 13+/- 4 15+ 4 14 +/-+4 17 +/-4 15 4 11+/- 3 06/02/11 06/09/11 24 _+5 25 +/- 5 27 +/-5 25 +/-+5 21 +/-+5 19 +/-+5 23 +/-+5 21 +/-+5 06/09/11 06/16/11 < 6 8+/-4 < 6 8+/-4 7+/-4 7_4 9_4 6+/-4 06/16/11 06/23/11 10 _5 12 +/-5 11 +/-+5 10+/- 5 11 +/-5 11 +/-+5 10+/- 5 10 +/-+5 06/23/11 06/30/11 12 +/- 4 15+/- 4 13 4 11 +/-+4 11 _+4 10 +/- 4 14 +/- 4 9+/-4 06/30/11 07/07/11 19 +/- 5 24 +/-+6 16+ 5 18+ 5 20 +/-+5 20 +/- 5 21 +/- 5 18 +/-+5 07/07/11 07/14/11 23 +/- 5 15+ 5 18 -5 24 +/-5 16+/- 5 21 +/- 5 22 +/- 5 19+ 5 07/14/11 07/21/11 24 +/- 5 27 _5 21 +/-5 23 +/-5 21 +/-+5 29 +/- 5 28 +/- 5 28 +/-+5 07/21/11 07/28/11 23 +/- 5 21 +/-+4 16 +/- 4 24 +/-5 21 +/-+4 23 +/- 5 19 +/- 4 19+/- 4 07/28/11 08/04/11 25 +/- 5 23 +/-+5 25 +/- 5 21 +/-+5 22 +/-+5 (1) 33 +/- 5 32 +/- 5 26 +/-+5 08/04/11 08/11/11 21 +/- 5 20 +/-5 18 +/- 5 17+ 5 18 +/-+5 22 +/- 5 23 +/- 5 22 +/-+5 08/11/11 08/18/11 24 +/- 5 23 +/-+4 25 +/- 5 18 +/-+4 21 +/-+4 25 +/- 5 21 +/- 4 22 +/-+5 08/18/11 08/25/11 24 +/- 5 25 +/- 5 21 +/- 5 26 +5 28 +/-+5 27 +/- 5 26 +/- 5 27 +/- 5 08/25/11 09/01/11 25 +/- 5 23 +/- 5 26 +/- 5 21 +5 20 +5 22 +/- 5 26 +/- 5 23 +/- 5 09/01/11 09/08/11 27 +/- 5 28 +/- 5 25 +/- 5 25 +/-+5 23 +/-5 24 +/- 5 22 +/- 4 23 +/- 5 09/08/11 09/15/11 21 +/- 4 19 +/- 4 18 +/- 4 17+ 4 20 +/- 4 19 +/- 4 24 +/- 4 22 +/- 4 09/15/11 09/22/11 21 +/- 5 17 +/- 4 19 +/- 4 21 +/-+5 14 +/- 4 20 +/- 4 16 +/- 4 18 +/- 4 09/22/11 09/29/11 22 +/- 5 15 +/- 4 17+ 4 16+ 4 14 +/- 4 18 +/- 4 18 +/- 4 18 +/- 4 09/29/11 10/06/11 21 +/- 4 22 +/- 4 22 +4 21 +/- 4 21 +/- 4 17 +/- 4 20 +/- 4 20 +/- 4 10/06/11 10/13/11 34 t 6 40 +/- 6 40 _+6 40 +/- 6 39 +/- 6 40 +/- 6 40 +/- 6 41 +/- 6 10/13/11 10/20/11 17 +/- 5 19 +/- 5 12+ 5 13 +/- 5 13 +/- 5 15 +/- 5 14 +/- 5 12 +/- 5 10/20/11 10/27/11 23 +/- 5 (1) 24 +/- 5 22 +/-+5 21 +/- 5 26 +/- 5 25 +/- 5 25 +/- 5 26 +/- 5 10/27/11 11/03/11 25 +/- 5 (1) 32 +/- 6 26 +/- 5 29 +/- 5 24 +/- 5 27 +/- 5 28 +/- 5 26 +/- 5 11/03/11 11/10111 18 +/- 5 (1) 20 +/- 5 28 +/- 7 (1) 17 +/- 5 21 +/- 5 21 +/- 5 20 +/- 5 21 +/- 5 11/10/11 11/16/11 27 +/- 6 (1) 36 +/- 6 33 +/- 6 32 +/- 6 31 +/- 6 28 +/- 6 30 +/- 6 24 +/- 6 11/16/11 11/23/11 18 +/- 4 14_ 4 12 +/- 4 (1) 15 +/- 4 15 +/-+4 15 +/- 4 12 +/- 4 13 +/- 4 11/23/11 12/01/11 21 +/- 4 (1) 16+/- 4 19 +/- 4 15 +/- 4 19+ 4 17 +/- 4 16 +/- 4 22 +/- 4 12/01/11 12/08/11 28 +/- 5 (1) 21 +/-+4 22 +/- 5 (1) 23 +/- 5 22 +/-+4 21 +/- 4 22 +/- 4 23 +/- 5 12/08/11 12/15/11 29 +/- 5 18+ 4 30 +/- 6 (1) 27 +/- 5 18 +/-4 24 +/- 5 26 +/- 5 30 +/- 5 12/15/11 12/22/11 34 +/- 5 35 +/-5 35 +/- 5 37 +/- 5 31 +/-5 35 +/- 5 37 +/- 5 33 +/- 5 12/22/11 12/29/11 23 + 5 21 + 5 20 +/- 5 17 +/- 5 18 +/-+5 23 +/- 5 24 +/- 5 24 +/- 5 MEAN 21 +/- 14 21 +/- 15 21 +/- 14 21 +/- 14 20 +/- 14 21 +/- 15 21 +/- 16 20 +/- 14

THE MEAN AND 2 STANDARD DEVIATION VALUES 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 INAIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 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 I" IaU U4/U3I II 16 37 27 +/- 14 12/30/10 - 02/03/11 I1 /! +/- 16 ILIz)UI IU - ULIUoI I I ID "+ Z4

£ I 14 02/03/11 03/03/11 11 24 19 +/- 8 02/03/11 - 03/03/11 9 23 18 +7 02/03/11 03/03/11 13 22 18 +/- 8 03/03/11 03/31/11 11 42 23 +/- 17 03/03/11 - 03131/11 14 34 23 +/- 14 03/03/11 03/31/11 14 28 21 +/- 14 03/31/11 04/28/11 8 24 15 +/- 11 03/31/11 - 04/28/11 8 25 15 +/-11 03/31/11 04/28/11 11 24 15 +/- 12 04/28/11 06/02/11 10 20 14 +/- 5 04/28/11 - 06/02/11 9 18 14 +/-5 04/28/11 06/02/11 7 14 11 +/- 5 06/02/11 06/30/11 8 27 15 +/- 14 06/02/11 - 06/30/11 7 23 13 +/-11 06/02/11 06/30/11 6 21 12 +/- 13 06/30/11 07/28/11 15 27 21 +/- 7 06/30/11 - 07/28/11 16 29 22 +/-7 06/30/11 07/28/11 18 28 21 +/- 9 07/28111 09/01/11 17 26 22 +/- 6 07128/11 - 09/01/11 18 33 24 +/-8 07/28/11 09/01/11 22 27 24 4 09/01/11 09/29/11 15 28 20 +/- 8 09/01/11 - 09/29111 14 24 19 +/-7 09/01/11 09/29/11 18 23 20 5 09/29/11 11/03/11 12 40 25 +/- 17 09129/11 - 11/03/11 13 40 25 +/- 18 09129/11 11/03/11 12 41 25 +/- 21 11/03/11 12/01/11 12 36 21 +/- 15 11/03/11 - 12/01/11 12 31 20 +/- 12 11/03/11 12/01/11 13 24 20 +/-t 10 12/01/11 12/29/11 17 37 26 +/- 13 12/01/11 - 12/29/11 18 37 25 +/- 12 12/01/11 12/29/11 23 33 27 10 12/30110 - 12/29/11 8 42 21 +/- 14 12/30/10 - 12/29/11 7 40 21 +/- 15 12/30/10 - 12/29/11 6 41 20 +/- 14

THE MEAN AND 2 STANDARD DEVIATION VALUES 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, 2011 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 12/30/10 - 03/31/11 < 4 <5 < 12 <2 <9 <4 <8 <3 <3 < 114 < 42 03/31/11 - 06/30/11 < 2 <3 <7 <2 <6 <3 <5 <1 <2 < 126 < 67 06/30/11 - 09/29/11 < 3 <4 <7 <3 <6 <4 <6 <2 <1 < 71 < 19 09/29/11 - 12/29/11 < 2 <2 <5 <2 <4 <2 <4 <2 <3 <17 <6 MEAN BD-03 03/10/11 - 03117/11 < 26 < 23 < 63 < 35 < 72 < 21 < 54 < 29 < 24 < 111 < 58 03117/11 - 03124/11 < 31 < 26 <46 < 33 < 80 < 30 < 53 < 37 < 29 < 109 < 30 03124/11 - 03/31/11 < 31 < 35 < 72 < 39 < 51 < 28 < 54 < 31 < 37 < 151 < 42 03/31/11 - 04/07111 < 43 < 35 < 67 < 41 < 90 < 36 < 52 < 43 < 34 < 156 < 48 12/30/10 - 03/31/11 < 3 <4

10 <3 <7 <4 <8 <3 <3 <114 <39 03/31/11 - 06/30/11 < 2 <2 <8 <1 <4 < 3 < 4 <2 < 1 < 123 < 47 06/30/11 - 09/29/11 < 2 <4 <7 <2 <6 <3 <6 <2 <2 <61 <18 09/29/11 - 12/29/11 < 3 <3 <5 <2 <7 <3 <6 <3 <2 <23 <11 MEAN BD-04 12/30/10 - 03131/11 < 3 <5 <9 <3 <9 <4 <8 <3 <2 < 121 < 30 03/31/11 - 06/30111 < 3 <3 < 11 <3 <7 <4 <8 <3 <2 < 207 < 54 06/30/11 - 09/29111 < 3 <3 < 11 <3 <8 <4 <7 <3 <3 < 75 < 35 09/29/11 - 12/29/11 < 4 <3 <9 <4 <7 <4 <6 <4 <4 < 26 < 10 MEAN BD-05 12/30/10 - 03/31/11 < 3 <5 < 13 <3 <8 <5 <8 <3 <3 < 127 < 45 03/31/11 - 06/30/11 < 1 <3 <7 <2 <6 <4 <6 <2 <2 < 166 < 101 06/30/11 - 09/29/11 < 2 <3 < 10 <2 <6 <3 <5 <2 <2 < 59 < 21 09/29/11 - 12/29/11 < 3 <4 <8 <4 <8 <3 <5 <3 <3 <24 < 9 MEAN BOLDED VALUES INDICATE ADDITIONAL SAMPLING DUE TO THE FUKUSHIMA EVENT

TABLE C-VI.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 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-06 12/30/10 - 03/31/11 < 3 <4 <9 <3 <7 <5 <8 <3 <3 < 125 < 47 03/31/11 - 06/30/11 < 2 <3 <8 <2 <4 <3 <4 <2 <2 < 131 < 46 06/30/11 - 09/29/11 < 2 <3 <9 <2 <4 <4 <5 <2 <2 < 66 <6 09/29/11 - 12/29/11 < 2 <2 <7 <2 <8 <3 <5 <3 <3 <23 <9 MEAN BD-19 12/30/10 - 03/31/11 < 4 <4 < 12 <4 <7 <5 <9 <3 <3 < 132 < 24 03131/11 - 06/30/11 < 2 <3 <8 <2 <5 <3 <6 <2 <2 < 136 < 62 06/30/11 - 09/29/11 < 2 <3 <7 <2 <5 <3 <5 <2 <2 < 57 < 28 09/29/11 - 12/29/11 < 2 <3 <5 <2 <7 <2 <5 <2 <2 <16 <7 MEAN BD-20 12/30/10 - 03/31/11 < 3 <3 < 10 <3 <9 <4 <6 <3 <3 < 112 < 52 03/31/11 - 06/30/11 < 3 <4 < 12 <4 <7 <5 <8 <3 <3 < 204 < 93 06/30/11 - 09/29/11 < 3 <3 <7 <2 <7 <3 <7 <3 <3 < 85 < 27 09/29111 - 12/29/11 < 2 <2 <5 <2 <4 <2 <5 <2 <2 <18 <5 MEAN BD-21 12/30/10 - 03/31/11 < 3 <5 < 12 <3 <5 <4 <6 <3 <3 < 144 < 45 03/31/11 - 06/30/11 < 3 <4 <8 <2 <8 <3 <6 <3 <2 < 196 < 62 06/30/11 - 09/29/11 < 2 <3 <9 <2 <4 <3 <4 <2 <2 < 59 < 22 09/29/11 - 12/29/11 < 2 <3 <6 <2 <7 <3 <4 <3 <2 <17 <9 MEAN

TABLE C-VII.1 CONCENTRATIONS OF 1-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION GROUP I I GROUP 11 GROUP III PERIOD BD-06 B0-1 9 BD-20 BD-21 BD-02 BD-04 B0-05 BD-03 12/30/10 -01/06/11 < 42 < 67 < 68 < 68 < 56 < 56 < 57 < 56 01/06/11 -01/13/11 < 30 < 29 < 30 < 30 < 22 < 21 < 22 < 22 01/13/11 -01/20/11 < 40 < 30 < 40 < 40 < 43 < 40 < 40 < 41 01/20/li1 01/27/11 < 62 < 62 < 62 < 62 < 51 < 51 < 51 < 51 01/27/11 -02/03/11 < 35 < 35 < 15 < 35 < 31 < 31 < 35 < 31 02/03/11 -02/10/11 < 36 < 36 < 36 < 36 < 20 < 20 < 21 < 20 02/10/11 -02/17/11 < 66 < 66 < 66 < 29 < 46 < 46 < 66 < 46 02/17/11 -02/24/11 < 45 < 46 (1) < 45 < 45 < 46 < 46 (1) < 46 < 46 02/24/11 -03/03/11 < 68 < 67 < 68 < 65 < 60 < 60 < 60 < 60 03/03/11 -03/10/11 < 46 < 46 < 46 < 46 < 34 < 34 < 34 < 34 03/10/11 -03/17/11 < 53 < 53 < 54 < 54 < 45 < 45 < 45 < 19 03/17/11 -03/24/11 111 +/- 26 85 +/- 41 84 +/- 34 84 +/- 27 77 +/- 39 86 +/- 26 67 +/- 26 50 +/- 25 03/24/11 -03/31/11 50 +/- 26 <47 36 +/-28 28 +/-22 <34 33 +/-25 <38 < 38 03/31/11 -04/07/11 63 +/- 30 67 +/- 28 55 +/- 31 78 +/- 32 52 +/- 32 47 +/- 36 69 +/- 29 53 +/- 26 04/07/11 -04/14/11 < 37 < 42 < 41 < 35 < 42 < 30 < 35 < 44 04/14/11 -04/21/11 < 57 < 58 < 58 < 58 < 56 < 56 < 57 < 56 04/21/11 -04/28/11 < 58 < 58 < 58 < 58 < 51 < 51 < 51 < 51 04/28/11 -05/05/11 < 63 < 63 < 63 < 63 < 53 < 53 < 53 < 53 05/05/11 -05/12/11 < 67 < 27 < 63 < 63 < 56 < 56 < 56 < 56 05/12/11 -05/19/11 < 51 < 51 < 52 < 51 < 56 < 58 < 57 < 56 05/19/11 -05/26/11 < 60 < 62 < 33 < 60 < 62 < 64 < 60 < 63 05/26/11 -06/02/11 < 44 < 44 < 44 < 44 < 59 < 59 < 57 < 59 06/02/11 -06/09/11 < 51 < 53 < 53 < 53 < 58 < 59 < 59 < 59 06/09/11 -06/16/11 < 48 < 48 < 48 < 48 < 36 < 36 < 36 < 36 06/16/11 -06/23/11 < 61 < 61 < 61 < 61 < 38 < 60 < 60 < 60 06/23/11 -06/30/11 < 69 < 69 < 69 < 69 < 58 < 58 < 58 < 58 06/30/11 -07/07/11 < 69 < 59 < 59 < 59 < 69 < 38 < 69 < 69 07/07/11 -07/14/11 < 60 < 60 < 60 < 58 < 61 < 61 < 61 < 61 07/14/11 -07/21/11 < 68 < 68 < 69 < 69 < 65 < 65 < 65 < 36 07/21/11 -07/28/11 < 31 < 31 < 31 < 31 < 41 < 41 < 41 < 41 07/28/11 -08/04/11 < 37 < 39 < 39 < 39 < 38 (1) < 20 < 37 < 37 08/04/11 -08/11/11 < 52 < 54 < 54 < 55 < 44 < 44 < 44 < 44 08/11/11 -08/18/11 < 62 < 45 < 47 < 47 < 62 < 62 < 26 < 62 08/18/11 -08/25/11 < 40 < 40 < 40 < 40 < 29 < 29 < 27 < 29 08/25/11 -09/01/11 < 18 < 38 < 38 < 38 < 32 < 32 < 32 < 32 09/01/11 -09/08/11 < 40 < 40 < 41 < 41 < 29 < 29 < 29 < 29 09/08/11 -09/15/11 < 48 < 26 < 48 < 48 < 53 < 53 < 53 < 53 09/15/11 -09/22/11 < 21 < 21 < 21 < 21 < 15 < 15 < 15 < 15 09/22/11 -09/29/11 < 62 < 63 < 63 < 63 < 51 < 51 < 51 < 51 09/29/11 -10/06/11 < 47 < 47 < 47 < 47 < 42 < 42 < 44 < 42 10/06/11 -10/13/11 < 29 < 28 < 29 < 16 < 43 < 43 < 43 < 43 10/13/11 -10/20/11 < 13 < 14 < 14 < 6 < 11 < 11 < 6 < 11 10/20/11 -10/27/11 < 33 (1) < 33 < 32 < 32 < 24 < 44 < 44 < 44 10/27/11 -11/03/11 < 57 (1) < 56 < 56 < 57 < 51 < 51 < 51 < 51 11/03/11 -11/10/11 < 49 (1) < 42 < 61 (1) < 42 < 47 < 47 < 47 < 26 11/10/11 -11/16/11 < 21 (1) < 20 < 21 < 21 < 47 < 45 < 48 < 48 11/16/11 -11/23/11 < 35 < 43 < 43 (1) < 43 < 34 < 19 < 34 < 34 11/23/11 -12/01/11 < 45 (1) < 45 < 45 < 45 < 51 < 51 < 51 < 50 12/01/111- 12/08/11 < 50 (1) < 52 < 59 (1) < 52 < 44 < 44 < 19 < 44 12/08/11 -12/15/11 < 32 < 32 < 43 (1) < 32 < 30 < 29 < 30 < 30 12/15/11 -12/22/11 < 15 < 27 < 27 < 27 < 28 < 28 < 28 < 28 12/22/11 -12/29/11 < 64 < 64 < 64 < 64 < 55 < 55 < 55 < 55 MEAN 75 +/-64 76+/-24 58 +/-49 63+/-62 64+/-35 55+/-54 68+/-2 51+/-4

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES C- 16

TABLE C-VIII.1 CONCENTRATIONS OF 1-131 IN MILK SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA CONTROL FARM IINDICATOR FARM COLLECTION BD-18 BD-17 PERIOD 01/06/11 < 0.7 < 0.5 02/03/11 < 0.6 < 0.7 03/03/11 < 0.5 < 0.5 03131/11 < 0.6 < 0.8 04/07/11 < 0.7 0.8 + 0.5 04/21/11

0.6 < 0.4 05/05/11 <0.7 < 0.8 05/19/11 < 0.5 < 0.6 06/02/11 < 0.7 < 0.7 06/16/11 < 0.9 < 0.7 06/30/11 < 0.7 < 0.8 07/14/11 < 0.8 < 0.9 07/28/11 < 0.8 < 0.8 08/11/11 < 0.9 < 0.7 08/25/11 < 0.8 < 0.8 09/08/11 < 0.7 < 0.7 09/22/11 < 0.8 < 0.7 10/06/11 < 0.7 < 0.6 10/20/11 < 0.7 < 0.6 11/03/ 11 < 0.9 < 0.7 12/01/11 < 0.6 < 0.5 MEAN BOLDED VALUES INDICATE ADDITIONAL SAMPLING DUE TO THE FUKUSHIMA EVENT C-17

TABLE C-VIII.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 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 01/06/11 <4 <3 <9 <4 <9 <4 <7 <3 <4 < 23 <6 02/03/11 <7 <7

16 <8 <16 <7 <12 <5 <6 < 41 < 12 03/03/11 <5 <6

12 <5 <9 <6 <8 <4 <5

32 <9 03131111 <5 <5 < 12 <6 < 10 <6 <8 <4 <5 < 41 < 15 04/07/11 <5 <5

14 <6 <9 <5 <10 <4 <5

41 *13 04/21/11 <5 <5 < 11 <6 < 11 <5 <9 <4 <5 < 22 <7 05/05/11 <5 <6 <15 <7 <15 <6 <10 <5 <6 < 32 <11 05/19/11 <4 <5 <13 <5 <9 <5 <8 <4 <4 < 43 <11 06/02/11 <6 <8 <21 <9 *13 <9 <14 <8 <7 < 54 *14 06/16/11 <7 <8 <19 <8

20 <9 <13 <6 <8

52 <14 06/30/11 <7 <6 <16 <7

13 <6 <11 <5 <6 < 39

13 07/14/11 <7 <8

20 <12 <17 <7 < 12 <6 <8 < 44

14 00 07/28/11 <6 <7 <14 <9 <14 <6 <11 <6 <7 < 35 <9 08/11/11 <8 <9 <18 <8 <18 <9 <14 <6 <8 < 35 <13 08125/11 <5 <5

16 <5 <11 <6 <10 <5 <5

28 <7 09108/11 <8 <8

16 <10

13 <6 <14 <6 <7 < 37 < 12 09/22111 <6 <6 <11 <6

15 <5 <12 <6 <7

26 <7 10/06/11 <6 <7

15 <8 <13 <6 <11 <5 <6

32 <9 10/20/11 <6 <6 <14 <8

16 <8 <13 <6 <7

42 < 14 11/03/11 <5 <6 <18 <7 <15 <6 <10 <6 <6

42 <6 12/01/11 <6 <6 <17 <7 <13 <5 <12 <5 <6

36 < 10 MEAN BOLDED VALUES INDICATE ADDITIONAL SAMPLING DUE TO THE FUKUSHIMA EVENT

TABLE C-VIII.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 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 01/06/11 <5 <5 *10 <5 <11 <5 <9 <4 <6

32

10 02/03/11 <6 <7 *18 <8 <14 <8 <13 <6 <6 < 43

12 03/03/11 <5 <6 <14 <7 <14 <6 <10 <5 <5

40 *13 03/31/11 <5 <7 < 14 <6 < 14 <6 < 11 <5 <6 < 48 < 11 04/07/11 <4 <5 < 14 <6

10 <5 <9 <4 <5

46 <13 04/21/11 <5 <5 < 12 <6 < 11 <5 < 10 <5 <5 < 26 <8 05/05/11 <5 <5 <11 <7 <12 <6 <10 <5 <6

32

10 05/19/11 <5 <5 *13 <7 <11 <6 <11 <4 <5 < 55 *15 06/02/11 <6 <7 *17 <7 < 14 <6 <13 <6 <6 <44 <13 06/16/11 <5 <7 <15 <7 < 16 <6 <13 <6 <7

48 <14 06/30/11 <5 <6 <14 <6 <11 <6 <11 <5 <6

30 <8 C) 07/14/11 <6 <6 *13 <7 < 12 <5 <11 <5 <6 <36 < 10 07/28/11 <8 <5 <18 <11 <15 <7 <13 <6 <7 < 43 <9 08/11/11 <5 <7 *17 <8 <18 <6 <15 <7 <7 < 43 <12 08/25/11 <6 <6 <15 <7 <15 <7 <11 <6 <6 < 42 *13 09/08/11 <6 <6 <14 <8 < 15 <7 <13 <6 <6 < 40 <10 09/22/11 <6 <5 <11 <7 <11 <6 <9 <5 <5

26 <9 10/06/11 <8 <8 <17 <11 <17 <7 <12 <7 <7 < 43 *13 10/20/11 <5 <6 *13 <7 <15 <6 <10 <5 <6 <34 <12 11/03/11 <8 <7 *17 <9 <14 <8 <12 <5 <7 <42 < 10 12/01/11 <6 <7 <17 <7

13 <7 <11 <5 <7

32 < 11 MEAN BOLDED VALUES INDICATE ADDITIONAL SAMPLING DUE TO THE FUKUSHIMA EVENT

TABLE C-IX.1 CONCENTRATIONS OF GAMMA EMITTERS INVEGETATION SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 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 Cabbage 09/27/11 < 9 < 10 < 31 < 11 < 22 < 10 < 21 < 9 < 9 < 81 < 31 Potatoes 09/27/11 < 14 < 16 < 38 < 24 < 38 < 17 < 33 < 13 < 16 < 106 < 26 MEAN BD-QUAD 1 Brussels sprouts 09/27/11 < 15 < 16 < 37 < 19 < 33 < 16 < 26 < 14 < 14 < 103 < 34 Onions 09127/11 < 15 < 16 < 43 < 16 < 36 < 18 < 29 < 13 < 19 < 139 < 32 MEAN - - - - - - - - - -

BD-QUAD 2 Broccoli 09/27/11 < 14 < 16 < 36 < 18 < 32 < 15 < 27 < 14 < 16 < 119 < 33 (db Potatoes 09/27/11 < 15 < 19 < 40 < 22 < 38 < 15 < 27 < 12 < 14 < 108 < 32 MEAN - - - - - - - - - -

BD-QUAD 3 Cabbage 09/27/11 < 14 < 12 < 39 < 16 < 35 < 13 < 25 < 13 < 12 < 110 < 30 Potatoes 09/27/11 < 14 < 17 < 33 < 15 < 36 < 14 < 24 < 13 < 11 < 108 < 21 MEAN BD-QUAD 4 Beets 09/27/11 < 15 < 16 < 42 < 18 < 37 < 16 < 28 < 12 < 17 < 122 < 35 Cauliflower 09/27111 < 16 < 16 < 40 < 19 < 39 < 16 < 32 < 17 < 15 < 120 < 30 MEAN

TABLE C-X.1 QUARTERLY TLD RESULTS FOR BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER +/- 2 STANDARD DEVIATIONS STATION MEAN JAN - MAR APR - JUN JUL - SEP OCT - DEC CODE + 2 S.D.

BD-02-1 19.8 +/- 1.9 19 21 19 20 BD-02-2 20.3 +/- 1.9 20 21 19 21 BD-03-1 20.8 +/- 3.0 19 22 20 22 BD-03-2 21.5 +/- 4.8 19 23 20 24 BD-04-1 20.5 +/- 2.6 19 22 20 21 BD-04-2 20.0 +/- 2.8 18 21 20 21 BD-05-1 21.0 +/- 3.3 19 23 21 21 BD-05-2 20.5 +/- 3.5 19 22 19 22 BD-06-1 20.3 +/- 3.0 19 22 19 21 BD-06-2 20.0 +/- 3.3 18 20 20 22 BD-19-1 20.8 +/- 3.0 20 22 19 22 BD-19-2 20.8 +/- 3.0 19 22 20 22 BD-20-1 21.0 +/- 2.3 20 22 20 22 BD-20-2 20.8 +/- 1.9 20 21 20 22 BD-21-1 20.0 +/- 2.8 18 21 20 21 BD-21-2 20.5 +/- 3.5 20 20 19 23 BD-101-3 20.0 +/- 3.7 18 22 19 21 BD-101-4 20.8 +/- 3.4 20 23 19 21 BD-102-1 19.3 +/- 3.4 17 20 19 21 BD-102-2 20.8 +/- 2.5 19 22 21 21 BD-103-1 21.8 +/- 2.5 20 23 22 22 BD-103-2 21.8 +/- 1.0 21 22 22 22 BD-104-1 19.5 +/- 2.6 18 21 19 20 BD-104-2 19.0 +/- 3.7 17 21 18 20 BD-105-1 20.3 +/- 3.4 18 22 20 21 BD-105-2 20.8 +/- 5.7 21 21 17 24 BD-106-1 20.3 +/- 3.4 18 22 20 21 BD-106-2 20.3 +/- 1.9 19 21 20 21 BD-107-1 20.8 +/- 3.0 19 22 20 22 BD-107-2 20.0 +/- 4.6 18 22 18 22 BD-108-1 19.8 +/- 1.9 19 21 19 20 BD-108-2 20.5 +/- 1.2 20 21 20 21 BD-109-1 24.3 +/- 8.4 20 30 23 24 BD-109-2 22.3 +/- 5.0 19 23 22 25 BD-110-1 21.3 +/- 5.5 18 24 20 23 BD-110-2 20.5 +/- 3.8 18 22 20 22 BD-112-1 20.5 +/- 3.8 18 22 20 22 BD-112-2 21.0 +/- 2.3 20 22 20 22 BD-114-1 20.0 +/- 2.8 20 22 19 19 8D-114-2 19.8 +/- 2.5 18 21 20 20 BD-115-1 20.8 +/- 3.4 19 23 20 21 BD-115-2 20.3 +/- 1.9 19 21 20 21 8D-116-1 20.3 +/- 1.9 20 21 19 21 BD-116-2 21.0 +/- 2.8 22 22 19 21 BD-201-1 23.3 +/- 1.9 22 24 23 24 BD-201-2 22.5 +/- 6.2 20 22 21 27 BD-202-1 19.5 +/- 2.6 18 21 19 20 BD-202-2 20.0 +/- 4.3 17 20 21 22 C-21

TABLE C-X.1 QUARTERLY TLD RESULTS FOR BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER +/- 2 STANDARD DEVIATIONS STATION MEAN JAN - MAR APR - JUN JUL - SEP OCT - DEC CODE +/- 2 S.D.

i BD-203-1 22.3 +/- 3.0 23 20 BD-203-2 19.8 +/- 3.0 21 19 BD-204-1 19.3 +/- 1.0 20 19 BD-204-2 18.8 +/- 1.9 18 19 BD-205-1 20.0 +/- 4.3 23 19 BD-205-2 20.0 +/- 2.8 21 20 BD-206-1 22.5 +/- 3.8 23 21 BD-206-2 20.8 +/- 3.0 22 20 BD-207-1 19.0 +/- 2.8 20 19 BD-207-2 20.3 +/- 4.4 21 19 BD-208-1 20.5 +/- 2.6 22 20 BD-208-2 19.8 +/- 3.0 21 19 BD-209-1 23.8 +/- 6.2 28 22 BD-209-2 24.5 +/- 2.6 25 24 BD-210-1 22.5 +/- 3.5 24 21 BD-210-2 21.0 +/- 2.3 22 20 BD-211-1 25.0 +/- 3.7 26 24 BD-211-2 24.8 +/- 2.5 25 25 BD-212-3 22.5 +/- 2.0 23 21 BD-212-4 23.8 +/- 1.9 25 23 BD-213-3 20.8 +/- 3.0 22 20 BD-213-4 20.0 +/- 2.3 21 19 BD-214-1 20.3 +/- 4.1 22 19 BD-214-2 24.3 +/- 6.4 (1) 23 BD-215-1 20.0 +/- 1.6 21 20 BD-215-2 19.3 + 1.9 20 19 BD-216-1 22.8 +/- 3.8 23 24 BD-216-2 21.5 + 3.8 23 21 BD-11 1A-1 21.3 +/- 1.9 22 22 BD-11 1A-2 20.0 +/- 2.8 19 19 BD-1 13A-1 20.8 _ 2.5 22 21 8D-1 13A-2 20.8 + 5.0 21 20 (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-22

TABLE C-X.2 MEAN QUARTLY TLD RESULTS FOR THE INNER RING, OUTER RING, OTHER AND CONTROL LOCATIONS FOR BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER +/- 2 STANDARD DEVIATIONS OF THE STATION DATA COLLECTION INNER RING OUTER RING OTHER CONTROL PERIOD +/-2 S.D.

JAN-MAR 19.1 +/- 2.4 19.8 +/- 4.0 19.1 +/- 1.5 19.0 +/- 0.0 APR-JUN 22.0 +/- 3.5 22.3 +/- 4.1 21.4 +/- 1.7 22.5 + 1.4 JUL-SEP 19.9 +/- 2.6 20.7 +/- 3.7 19.6 +/- 1.3 20.0 +/- 0.0 OCT-DEC 21.5 +/- 2.6 22.7 +/- 4.8 21.5 +/- 1.5 23.0 +/- 2.8 TABLE C-X.3

SUMMARY

OF THE AMBIENT DOSIMETRY PROGRAM FOR BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER LOCATION SAMPLES PERIOD PERIOD PERIOD MEAN ANALYZED MINIMUM MAXIMUM +/- 2 S.D.

U INNER RING 128 17 30 20.6 +/- 3.7 OUTER RING 127 17 28 21.4 +/- 4.7 OTHER 56 18 23 20.4 +/- 2.6 CONTROL 8 19 24 21.1 +/- 3.8 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-1 1 1A-2, BD-1 12-1, BD-1 12-2, BD-1 13A-1, BD-1 13A-2, BD-1 14-1, BD-1 14-2, BD-1 15-1, BD-1 15-2, BD-1 16-1, BD-1 16-2 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 C-23

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

Collected in the Vicinity of Braidwood Station, 2000 - 2011 BD-10 Kankaee River, Downstream 10.0 8.0 6.0 C-a,.

4.0 2.0 0.0 i I I . I I I 01-01-00 12-31-01 12-31-03 12-30-05 12-30-07 12-29-09 12-29-11 BD-25 (C) Kankakee River, Upstream 16.0 14.0 12.0 10.0

-J C.) 8.0 a.

6.0 I 4.0 2.0 01-01-00 12-31-01 12-31-03 12-30-05 12-30-07 12-29-09 122!9-11 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 - 2011 BD-38 Main Drainage Ditch 14.0 12.0 10.0 8.0 6.0 4.0 2.0 0.0 I 01-25-07 11-21-07 09-16-08 07-13-09 05-09-10 03-05-11 12-30-11 BD-40 Braidwood Station Cooling Lake 16.0 14.0 12.0 10.0

-J 8.0 6.0 4.0 2.0 0.0 0 0 0 0 0 0 10-05-06 08-20-07 07-04-08 05-19-09 04-03-10 02-16-11 01-01-12 C-25

FIGURE C-3 Surface Water - Gross Beta - Stations BD-55 and BD-56 Collected in the Vicinity of Braidwood Station, 2007 - 2011 BD-55 North Pond Fatlan Site 14.0 12.0 10.0

-J 8.0 a.

6.0 4.0 2.0 jtýýA ApaC' 'Cvý& ýAA 0.0 I I I I I I 01-255-07 11-21-07 09-16-08 07-13-09 05-09-10 03-05-11 12-30-11 BD-56 South Pond Fatlan Site 10,0 -r 8.0 +

6.0 "

,-J ao.

4.0 2.0 0;v 0 L?

0.0 i i 01-25-07 11-21-07 09-16-08 07-13-09 05-09-10 03-05-11 12-30-11 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 - 2011 BD-10 Kankakee River, Downstream 2400 2100 1800 1500 oL. 1200 900 600 300 0

03-25-00 03-11-02 02-25-04 02-10-06 01-27-08 01-12-10 12-29-11 BD-25 (C) Kankakee River, Upstream 400 300 200 a.

100 0 - I I I I I 03-25-00 03-11-02 02-25-04 02-10-06 01-27-08 01-12-10 12-29-11 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 - 2011 BD-38 Main Drainage Ditch 2400 2100 1800

.J 1500

0. 1200 900 600 300 - ,' -~

~

0 03-09-06 02-26-07 02-15-08 02-03-09 01-23-10 01-12-11 01-01-12 BD-40 Braidwood Station Cooling Lake 400 T 300 -I 0 200 100 +

0 I I I I I 07-20-06 06-17-07 05-14-08 04-11-09 03-09-10 02-04-11 01-02-12 C-28

FIGURE C-6 Surface Water - Tritium - Stations BD-55 and BD-56 Collected in the Vicinity of Braidwood Station, 2007 - 2011 BD-55 North Pond Fatlan Site 250 T 200 150 A a,.

100 +

50 +

0 I I I I 03-29-07 01-13-08 10-29-08 08-15-09 06-01-10 03-18-11 01-02-12 BD-56 South Pond Fatlan Site 250 T 200 150

-J C.)

100 +

50 +

0 I I I I 1 03-29-07 01-13-08 10-29-08 08-15-09 06-01-10 03-18-11 01-02-12 C-29

FIGURE C-7 Public Water - Gross Beta - Station BD-22 Collected in the Vicinity of Braidwood Station, 2000 - 2011 BD-22 Wilmington 10.0 8.0 6.0

-C C-,

4.0 2.0 0.0+ I i i i i 01-29-00 01-24-02 01-20-04 01-15-06 01-11-08 01-06-10 01-02-12 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 - 2011 BD-22 Wilmington 7600 7200 6800 6400 6000 5600 5200 4800 4400

" 4000 0 3600 C. 3200 2800 2400 2000 1600 1200 800 400 0

01-29-00 01-24-02 01-20-04 01-15-06 01-11-08 01-06-10 01-02-12 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 - 2011 BD-13 Braidwood City Hall Well 500 400

.J 300 200 100 0

01-07-00 01-05-02 01-04-04 01-02-06 01-01-08 12-30-09 12-29-11 BD-34 Gibson Well 700 -

600 500

. 400 0- 300 200 100 -

0 01-07-00 01-05-02 01-04-04 01-02-06 01-01-08 12-30-09 12-29-11 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 - 2011 BD-35 Joly Well 500 1 400 300 C.)

200 100 01 n iM- 01 1i 12 1 01-07-00 01-05-02 01-04-04 01-02-06 01-01-08 12-30-09 12-29-11 BD-36 Hutton Well 1200 1000 800 600 0.

400 200 04 I I I I I I 01-07-00 01-05-02 01-04-04 01-02-06 01-01-08 12-30-09 12-29-11 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JULY.

C-33

FIGURE C-1I Ground/Well Water - Tritium - Station BD-37 Collected in the Vicinity of Braidwood Station, 2000 - 2011 BD-37 Nurczyk Well 600 500 400 0

300 200 100 0 -

01-07-00 01-05-02 01-04-04 01-02-06 01-01-08 12-30-09 12-29-11 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 - 2011 BD-50 Skole Well 1000 900 800 700

-J 600

0. 500 400 300 200 100 0 I I I I 01-01-07 11-01-07 08-31-08 07-01-09 05-01-10 03-01-11 12-30-11 BD-51 Fatlan Well 600 +

500 +

400 +

-J C-)

300 +

200 100 01-03-07 11-03-07 09-02-08 07-03-09 05-03-10 03-03-11 01-01-12 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 - 2011 BD-53 Phelps Well 600 500 400 CJ

a. 300 200 100 0 I I I I I I 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 +

,-J

0. 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-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 - 2011 BD-03 (C) County Line Road 80.0 60.0 0

C-)

a.

40.0 9

0 20.0 0.0 I i I i Ii 01-07-00 01-05-02 01-04-04 01-02-06 01-01-08 12-30-09 12-29-11 BD-06 Godley 60.0 50.0 E 40.0 a.

30.0 LU 0 20.0 10.0 , I .... '

,v, ' lii" 0.0 I I I 01-07-00 01-05-02 01-04-04 01-02-06 01-01-08 12-30-09 12-29-11 C-37

FIGURE C-15 Air Particulate - Gross Beta- Stations BD-19 and BD-20 Collected in the Vicinity of Braidwood Station, 2000 - 2011 BD-19 Nearsite, NW 60.0 50.0 S40.0 E

0. 30.0 o 20.0 10.0 0.0 i I I I I I 01-07-00 01-05-02 01-04-04 01-02-06 01-01-08 12-30-09 12-29-11 BD-20 Nearsite, N 70.0 60.0 50.0 CL 40.0 m

0.

9 0q w, 30.0 u0 20.0 10.0 0.0 I I I I 01-07-00 01-05-02 01-04-04 01-02-06 01-01-08 12-30-09 12-29-11 C-38

FIGURE C-16 Air Particulate - Gross Beta- Station BD-21 Collected in the Vicinity of Braidwood Station, 2000 - 2011 BD-21 Nearsite, NE 70.0 60.0 50.0 E O40.0 C',

0. 1 c? 30.0

- 20.0 10.0 0.0 i- i I i i i 01-07-00 01-05-02 01-04-04 01-02-06 01-01-08 12-30-09 12-29-11 C-39

FIGURE C-17 Air Particulate - Gross Beta- Stations BD-02 and BD-04 Collected in the Vicinity of Braidwood Station, 2005 - 2011 BD-02 Nearsite, NW 50.0 40.0 E 30.0 C.)

03 w

9 20.0 oj T-10.0 0.0 I I I ti 1 07-07-05 08-06-06 09-05-07 10-04-08 11-03-09 12-03-10 01-02-12 BD-04 Nearsite, N 60.0 50.0 E 40.0 0.

30.0 UJ 20.0 0

10.0 0.0 I I 07-07-05 08-06-06 09-05-07 10-04-08 11-03-09 12-03-10 01-02-12 C-40

FIGURE C-18 Air Particulate - Gross Beta- Station BD-05 Collected in the Vicinity of Braidwood Station, 2005 - 2011 BD-05 Nearsite, NE 60.0 50.0 30.0 C 20.0 10.0 0.0 I I i I I 07-07-05 08-06-06 09-05-07 10-04-08 11-03-09 12-03-10 01-02-12 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, 2011 (PAGE 1 OF 3)

Identification Reported Known Ratio (c)

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

March 2011 E7460-396 Milk Sr-89 pCi/L 98.8 97.4 1.01 A Sr-90 pCi/L 15.2 15.8 0.96 A E7461-396 Milk 1-131 pCi/L 92.9 96.9 0.96 A Ce-141 pCi/L not provided by Analytics for this study Cr-51 pCi/L 398 298 1.34 N (1)

Cs-134 pCi/L 130 130 1.00 A Cs-1 37 pCi/L 232 205 1.13 A Co-58 pCi/L 121 113 1.07 A Mn-54 pCi/L 289 266 1.09 A Fe-59 pCi/L 201 175 1.15 A Zn-65 pCi/L 287 261 1.10 A Co-60 pCi/L 186 172 1.08 A E7463-396 AP Ce-141 pCi not provided by Analytics for this study Cr-51 pCi 243 215 1.13 A Cs-134 pCi 85.0 94.2 0.90 A Cs-1 37 pCi 168 148 1.14 A Co-58 pCi 89.2 81.8 1.09 A Mn-54 pCi 171 192 0.89 A Fe-59 pCi 129 126 1.02 A Zn-65 pCi 159 189 0.84 A Co-60 pCi 132 124 1.06 A E7462-396 Charcoal 1-131 pCi 96.5 96.3 1.00 A June 2011 E7851-396 Milk Sr-89 pCi/L 96.7 103 0.94 A Sr-90 pCi/L 13.8 15.6 0.88 A E7852-396 Milk 1-131 pCi/L 110 103.0 1.07 A Ce-141 pCi/L 68.1 79.9 0.85 A Cr-51 pCi/L 186 206 0.90 A Cs-134 pCi/L 164 190 0.86 A Cs-137 pCi/L 140 138 1.01 A Co-58 pCi/L 141 152 0.93 A Mn-54 pCi/L 136 138 0.99 A Fe-59 pCi/L 128 123 1.04 A Zn-65 pCi/L 263 261 1.01 A Co-60 pCi/L 189 195 0.97 A E7854-396 AP Ce-141 pCi 49.9 42.9 1.16 A Cr-51 pCi 95.6 110 0.87 A Cs-134 pCi 104 102 1.02 A Cs-1 37 pCi 83.8 74.0 1.13 A Co-58 pCi 90.7 81.3 1.12 A Mn-54 pCi 74.5 73.9 1.01 A Fe-59 pCi 62.0 66.1 0.94 A Zn-65 pCi 140 140 1.00 A Co-60 pCi 119 104 1.14 A E7853-396 Charcoal 1-131 pCi 76.2 86.1 0.89 A D-1

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2011 (PAGE 2 OF 3)

Identification Reported Known Ratio (c)

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

September 2011 E8070-396 Milk Sr-89 pCi/L 102 90.8 1.12 Sr-90 pCi/L 13.2 14.7 0.90 E8071-396 Milk 1-131 pCi/L 74.2 89.2 0.83 Ce-141 pCi/L 66.9 66.7 1.00 Cr-51 pCi/L 249 226 1.10 Cs-134 pCi/L 116 128 0.91 Cs-137 pCi/L 106 114 0.93 Co-58 pCi/L 95.4 97.5 0.98 Mn-54 pCi/L 147 151 0.97 Fe-59 pCi/L 53.1 54.8 0.97 Zn-65 pCi/L 175 180 0.97 Co-60 pCi/L 150 157 0.96 E8073-396 AP Ce-141 pCi 66.6 67.5 0.99 Cr-51 pCi 263 229 1.15 Cs-134 pCi 139 130 1.07 Cs-1 37 pCi 110 115 0.96 Co-58 pCi 108 98.6 1.10 Mn-54 pCi 152 153 0.99 Fe-59 pCi 57.5 55.5 1.04 Zn-65 pci 190 183 1.04 Co-60 pCi 156 159 0.98 E8072-396 Charcoal 1-131 pCi 77.6 80.6 0.96 A December, 2011 E8230-396 Milk Sr-89 pCi/L 93.3 93.1 1.00 A Sr-90 pCi/L 12.7 15.4 0.82 A E8231-396 Milk 1-131 pCi/L 82.5 90.2 0.91 A Ce-141 pCi/L not provided by Analytics for this study Cr-51 pCi/L 465 566 0.82 A Cs-134 pCi/L 142 171 0.83 A Cs-1 37 pCi/L 185 210 0.88 A Co-58 pCi/L 177 221 0.80 A Mn-54 pCi/L 208 241 0.86 A Fe-59 pCi/L 164 183 0.90 A Zn-65 pCi/L 259 291 0.89 A Co-60 pCi/L 224 270 0.83 A E8233-396 AP Ce-141 pCi not provided by Analytics for this study Cr-51 pCi 344 368 0.93 A Cs-134 pCi 105 111 0.95 A Cs-137 pCi 129 137 0.94 A Co-58 pCi 145 144 1.01 A Mn-54 pCi 137 157 0.87 A Fe-59 pCi 119 119 1.00 A Zn-65 pCi 145 190 0.76 W Co-60 pCi 168 176 0.95 A D-2

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2011 (PAGE 3 OF 3)

Identification Reported Known Ratio (c)

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

December 2011 E8232-396 Charcoal 1-131 pCi 100 89.5 1.12 A (1) Sample appears to be biased high. Corrective Action evaluated after the 2nd QuarterAnalytics PE sample; no action required. NCR 11-13 (a) Teledyne Brown Engineering reportedresult.

(b) The Analytics known value is equal to 100% of the parameterpresent in the standardas determined by gravimetricand/or volumetric measurements made duringstandardpreparation.

(c) Ratio of Teledyne Brown Engineeringto 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-A cceptable 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 < O.70 and > 1.30.

D-3

TABLE D-2 ERA ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2011 (PAGE 1 OF 1)

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

May 2011 RAD-85 Water Sr-89 pCi/L 59.8 63.2 51.1 -71.2 A Sr-90 pCi/L 42.5 42.5 31.3-48.8 A Ba-1 33 pCi/L 73.3 75.3 63.0 - 82.8 A Cs-1 34 pCi/L 64.9 72.9 59.5 - 80.2 A Cs-1 37 pCi/L 74.6 77.0 69.3 - 87.4 A Co-60 pCi/L 87.8 88.8 79.9 - 100 A Zn-65 pCi/L 103 98.9 89.0- 118 A Gr-A pCi/L 64.1 50.1 26.1 -62.9 N (1)

Gr-B pCi/L 51.8 49.8 33.8 - 56.9 A 1-131 pCi/L 27.4 27.5 22.9 -32.3 A U-Nat pCi/L 38.5 39.8 32.2 -44.4 A H-3 pCi/L 10057 10200 8870- 11200 A MRAD-14 Filter Gr-A pCi/filter 79.7 74.3 38.5-112 A November 2011 RAD-87 Water Sr-89 pCi/L 81.0 69.7 56.9 - 77.9 N (2)

Sr-90 pCi/L 35.5 41.4 30.2 -47.2 A Ba-1 33 pCi/L 90.7 96.9 81.8-106 A Cs-1 34 pCi/L 36.6 33.4 26.3 -36.7 A Cs-1 37 pCi/L 44.7 44.3 39.4 -51.7 A Co-60 pCi/L 118.7 119 107 - 133 A Zn-65 pCi/L 80.2 76.8 68.9 - 92.5 A Gr-A pCi/L 34.2 53.2 27.8 - 66.6 A Gr-B pCi/L 39.3 45.9 30.9 -53.1 A 1-131 pCi/L 22.9 27.5 22.9 - 32.3 A U-Nat pCi/L 46.8 48.6 39.4 - 54.0 A H-3 pCi/L 15733 17400 15200 - 19100 A MRAD-15 Filter Gr-A pCi/filter 44.6 58.4 30.3 - 87.8 A (1) The solids on the planchet exceeded 100 mg, which was beyond the range of the efficiency curve. NCR 11-08 (2) Sr-89 TBE to known ratio of 1. 16 fell within acceptable range of+/- 20%. No action required.NCR 11-16 (a) Teledyne Brown Engineering reportedresult.

(b) The ERA known value is equal to 100% of the parameterpresent in the standardas determined by gravimetricand/or volumetric measurements made duringstandardpreparation.

(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 ControlLimits and outside of the Warning Limit.

D-4

TABLE D-3 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)

TELEDYNE BROWN ENGINEERING, 2011 (PAGE 1 OF 2)

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

March 2011 11 -MaW24 Water Cs-1 34 Bq/L 19.1 21.5 15.1 -28.0 A Cs-1 37 Bq/L 29.0 29.4 20.6 - 38.2 A Co-57 Bq/L 0.139 (1) A Co-60 Bq/L 23.9 24.6 17.2-32.0 A H-3 Bq/L 265 243 170 - 316 A Mn-54 Bq/L 31.8 31.6 22.1 -41.1 A K-40 Bq/L 94.8 91 64 - 118 A Sr-90 Bq/L 9.64 8.72 6.10-11.34 A Zn-65 Bq/L -0.142 (1) A 11-GrW24 Water Gr-A Bq/L 0.767 1.136 0.341 - 1.931 A Gr-B Bq/L 3.43 2.96 1.48 - 4.44 A 11-MaS24 Soil Cs-1 34 Bq/kg 612 680 476 - 884 A Cs-1 37 Bq/kg 772 758 531 -985 A Co-57 Bq/kg 910 927 649 - 1205 A Co-60 Bq/kg 500 482 337 - 627 A Mn-54 Bq/kg 0.607 (1) A K-40 Bqlkg 569 540 378 - 702 A Sr-90 Bq/kg NR 160 112- 208 N (2)

Zn-65 Bq/kg 1497 1359 951 - 1767 A 11 -Rd F24 AP Cs-134 Bq/sample 3.26 3.49 2.44 - 4.54 A Cs-137 Bq/sample 2.36 2.28 1.60-2.96 A Co-57 Bq/sample 3.30 3.33 2.33-4.33 A Co-60 Bq/sample 0.0765 (1) A Mn-54 Bq/sample 2.84 2.64 1.85 -3.43 A Sr-90 Bq/sample NR 1.36 0.95 - 1.77 N (2)

Zn-65 Bq/sample 3.30 3.18 2.23-4.13 A 11-GrF24 AP Gr-A Bq/sample 0.101 0.659 0.198 - 1.120 N (3)

Gr-B Bq/sample 1.23 1.323 0.662 - 1.985 A 11-RdV24 Vegetation Cs-1 34 Bq/sample 4.97 5.50 3.85 -7.15 A Cs-1 37 Bq/sample 0.0356 (1) A Co-57 Bq/sample 10.8 9.94 6.96 - 12.92 A Co-60 Bq/sample 4.89 4.91 3.44 -6.38 A Mn-54 Bq/sample 6.42 6.40 4.48 - 8.32 A Sr-90 Bq/sample NR 2.46 1.72-3.20 N (2)

Zn-65 Bq/sample 3.07 2.99 2.09 - 3.89 A September 2011 11-MaW25 Water Cs-134 Bq/L 16.0 19.1 13.4-24.8 A Cs-137 Bq/L 0.0043 (1) A Co-57 Bq/L 33.1 36.6 25.6 - 47.6 A Co-60 Bq/L 26.9 29.3 20.5-38.1 A H-3 Bq/L 1011 1014 710-1318 A Mn-54 Bq/L 23.2 25.0 17.5-32.5 A K-40 Bq/L 147 156 109 - 203 A Sr-90 Bq/L 15.8 14.2 9.9 - 18.5 A Zn-65 Bq/L 27.3 28.5 20.0-37.1 A D-5

TABLE D-3 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)

TELEDYNE BROWN ENGINEERING, 2011 (PAGE 2 OF 2)

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

September 2011 11-GrW25 Water Gr-A Bq/L 0.894 0.866 0.260 - 1.472 A Gr-B Bq/L 5.87 4.81 2.41 - 7.22 A 11-MaS25 Soil Cs-134 Bq/kg -0.213 (1) A Cs-137 Bq/kg 1110 979 685-1273 A Co-57 Bq/kg 1290 1180 826- 1534 A Co-60 Bq/kg 731 644 451 -837 A Mn-54 Bq/kg 987 848 594-1102 A K-40 Bq/kg 753 625 438-813 W Sr-90 Bq/kg 276 320 224-416 A Zn-65 Bq/kg 1870 1560 1092-2028 A September 2011 11-RdF25 AP Cs-134 Bq/sample -0.043 (1) A Cs-137 Bq/sample 3.09 2.60 1.82 -3.38 A Co-57 Bq/sample 5.36 5.09 3.56 - 6.62 A Co-60 Bq/sample 3.41 3.20 2.24 -4.16 A Mn-54 Bq/sample 0.067 (1) A Sr-90 Bq/sample 1.84 1.67 1.17-2.17 A Zn-65 Bq/sample 5.17 4.11 2.88 -5.34 W 11-GrF25 AP Gr-A Bq/sample 0.0058 (1) A Gr-B Bq/sample -0.01 (1) A 11-RdV25 Vegetation Cs-134 Bq/sample 0.0081 (1) A Cs-137 Bq/sample 4.94 4.71 3.30 -6.12 A Co-57 Bq/sample 0.0639 (1) A Co-60 Bq/sample 3.36 3.38 2,37 - 4.39 A Mn-54 Bq/sample 5.89 5.71 4.00 - 7.42 A Sr-90 Bq/sample 1.31 1.26 0.88- 1.64 A Zn-65 Bq/sample 6.54 6.39 4.47 - 8.31 A (1) False positive test.

(2) Evaluatedas failed due to not reporting a previously reported analyte. NCR 11-11 (3) The filter for Gross Alpha was counted on the wrong side. Recounted on the correct side resulted in acceptable results. NCR 11-11 (a) Teledyne Brown Engineeringreported result.

(b) The MAPEP known value is equal to 100% of the parameterpresent in the standardas determinedby gravimetric and/or volumetric measurements made during standardpreparation.

(c) DOEIMAPEP evaluation: A=acceptable, W=acceptable with warning, N=not acceptable.

D-6

TABLE D-4 ERA (a) STATISTICAL

SUMMARY

PROFICIENCY TESTING PROGRAM' ENVIRONMENTAL, INC., 2011 (Page 1 of 1)

Concentration (pCi/L)

Lab Code Date Analysis Laboratory ERA Control Result b Result c Limits Acceptance STW-1243 04/04/11 Sr-89 68.2 +/- 5.8 63.2 51.1 -71.2 Pass STW-1243 04/04/11 Sr-90 44.3 +/- 2.4 42.5 31.3 -48.8 Pass STW-1244 04/04/11 Ba-133 69.8 +/- 3.9 75.3 63.0 - 82.8 Pass STW-1244 04/04/11 Co-60 87.9 +/- 3.8 88.8 79.9 - 100.0 Pass STW-1244 04/04/11 Cs-134 69.5 +/- 3.7 72.9 59.5 - 80.2 Pass STW-1244 04/04/11 Cs-1 37 77.9 +/- 5.3 77.0 69.3 - 87.4 Pass STW-1244 04/04/11 Zn-65 105.2 +/- 8.4 98.9 89.0 -118.0 Pass STW-1 245 04/04/11 Gr. Alpha 41.5 +/- 2.3 50.1 26.1 -62.9 Pass STW-1245 04/04/11 Gr. Beta 48.9 +/- 1.8 49.8 33.8 - 56.9 Pass STW-1246 04/04/11 1-131 26.6 +/- 1.7 27.5 22.9 - 32.3 Pass STW-1248 04/04/11 H-3 10322 +/-285 10200.0 8870 -11200 Pass STW-1256 10107/11 Sr-89 68.7 +/- 6.0 69.7 56.9 - 77.9 Pass STW-1256 10/07/11 Sr-90 36.9 +/- 2.4 41.1 30.2 -47.2 Pass STW-1257 10/07/11 Ba-133 88.2 +/- 7.8 96.9 81.8 -106.0 Pass STW-1257 10/07/11 Co-60 116.5 +/-7.1 119.0 107.0 - 133.0 Pass STW-1257 10/07/11 Cs-134 38.8 +/- 8.0 33.4 26.3 - 36.7 Fail STW-1257 10/07/11 Cs-137 45.6 +/- 7.3 44.3 39.4 -51.7 Pass STW-1257 10/07/11 Zn-65 84.9 +/- 15.4 76.8 68.9 - 92.5 Pass STW-1258 10/07/11 Gr. Alpha 35.7 +/- 3.8 53.2 27.8 - 66.6 Pass STW-1 258 10/07/11 Gr. Beta 36.1 +/- 3.3 45.9 30.9 -53.1 Pass STW-1 259 10/07/11 1-131 25.0 +/- 1.1 27.5 22.9 - 32.3 Pass STW-1261 10/07/11 H-3 17435 +/-382 17400 15200 - 19100 Pass Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing in drinking water conducted by Environmental Resources Associates (ERA).

b Unless otherwise indicated, the laboratory result is given as the mean +/- standard deviation for three determinations.

C Results are presented as the known values, expected laboratory precision (1 sigma, 1 determination) and control limits as provided by ERA.

d The sample was reanalyzed. Result of reanalysis was acceptable, 32.9 +/- 7.4 pCi/L.

D-7

TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)'

ENVIRONMENTAL, INC., 2011 (Page 1 of 2)

Concentration b Lab Code ' Date Analysis Laboratory result Activity Limits d Acceptance STW-1 237 02/01/11 Co-57 < 0.2 0.00 Pass STW-1 237 02/01/11 Co-60 24.10 +/- 0.40 24.60 17.20 -32.00 Pass STW-1 237 02/01/11 Cs- 134 19.80 +/- 0.40 21.50 15.10 -28.00 Pass STW-1237 02/01/11 Cs-1 37 29.40 +/- 0.50 29.40 20.60 - 38.20 Pass STW-1237 02/01/11 H-3 238.90 +/- 8.80 243.00 170.00 -316.00 Pass STW-1 237 02/01/11 K-40 95.40 +/- 3.10 91.00 64.00 - 118.00 Pass STW-1 237 02/01/11 Mn-54 32.50 +/- 0.60 31.60 22.10 -41.10 Pass STW-1237 02/01/11 Sr-90 8.70 .+/- 0.70 8.72 6.10 -11.34 Pass STW-1237 02/01/11 Zn-65 <0.5 0.00 Pass STW-1 238 02/01/11 Gr. Alpha 0.82 +/- 0.07 1.14 0.34 -1.93 Pass STW-1238 02/01/11 Gr. Beta 2.82 +/- 0.07 2.96 1.48 -4.44 Pass STVE-1 239 02101111 Co-57 11.27 +/- 0.21 9.94 6.96 - 12.92 Pass STVE-1 239 02/01/11 Co-60 4.95 +/- 0.16 4.91 3.44 - 6.38 Pass STVE-1 239 02/01/11 Cs-1 34 5.18 +/- 0.19 5.50 3.85 -7.15 Pass STVE-1239 02/01/11 Cs-137 < 0.09 0.00 Pass STVE-1239 02/01/11 Mn-54 6.91 +/- 0.25 6.40 4.48 - 8.32 Pass STVE-1 239 02/01/11 Zn-65 3.10 +/- 0.32 2.99 2.09 - 3.89 Pass STSO-1240 02/01/11 Co-57 984.10 +/- 4.10 927.00 649.00 - 1205.00 Pass STSO-1240 02/01/11 Co-60 540.70 +/- 3.00 482.00 337.00 - 627.00 Pass STSO-1240 02/01/11 Cs-1 34 726.70 +/- 5.92 680.00 476.00 - 884.00 Pass STSO-1 240 02/01/11 Cs-137 883.10 +/- 4.70 758.00 531.00 -985.00 Pass STSO-1 240 02/01/11 K-40 622.70 +/- 16.70 540.00 378.00 - 702.00 Pass STSO-1240 02/01/11 Mn-54 -0.30 +/- 1.00 0.00 Pass STSO-1240 02/01/11 Zn-65 1671.00 +/- 13.10 1359.00 951.00 - 1767.00 Pass STAP-1241 02/01/11 Co-57 3.48 +/- 0.06 3.33 2.33 -4.33 Pass STAP-1241 02/01/11 Co-60 0.00 +/- 0.02 0.00 -0.10 -0.10 Pass STAP-1241 02/01/11 Cs-134 3.44 +/- 0.27 3.49 2.44 - 4.54 Pass STAP-1241 02/01/11 Cs-137 2.46 +/- 0.27 2.28 1.60 -2.96 Pass STAP-1241 02/01/11 Gr. Alpha 0.39 +/- 0.05 0.66 0.20 -1.12 Pass STAP-1241 02/01/11 Gr. Beta 1.54 +/- 0.07 1.32 0.66 - 1.99 Pass STAP-1241 02/01/11 Mn-54 2.90 +/- 0.10 2.64 1.85 -3.43 Pass STAP-1241 e 02/01/11 Sr-90 1.89 +/- 0.15 1.36 0.95 - 1.77 Fail STAP-1241 02/01/11 Zn-65 3.80 +/- 0.18 3.18 2.23 -4.13 Pass STVE-1 250 08/01/11 Co-57 0.01 +/- 0.02 0.00 Pass STVE-1 250 08101/11 Co-60 3.57 +/- 0.13 3.38 2.37 - 4.39 Pass STVE-1 250 08/01/11 Cs-134 -0.02 +/- 0.04 0.00 -0.10 -0.10 Pass STVE-1 250 08/01/11 Cs-1 37 5.28 +/- 0.20 4.71 3.30 -6.12 Pass STVE-1 250 08/01/11 Mn-54 6.48 +/- 0.22 5.71 4.00 - 7.42 Pass STVE-1 250 08/01/11 Zn-65 7.35 +/- 0.34 6.39 4.47 - 8.31 Pass D-8

TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)a ENVIRONMENTAL, INC., 2011 (Page 2 of 2) b Concentration Known Control Lab Code c Date Analysis Laboratory result Activity Limits d Acceptance STSO-1251 08/01/11 Co-57 1333.90 +/- 4.20 1180.00 826.00 - 1534.00 Pass STSO-1 251 08/01/11 Co-60 701.30 +/- 3.40 644.00 451.00 -837.00 Pass STSO-1251 08/01/11 Cs-134 0.71 +/- 1.05 0.00 Pass STSO-1251 08/01/11 Cs-137 1106.00 +/- 5.60 979.00 685.00 - 1273.00 Pass STSO-1251 08/01/11 K-40 749.20 +/- 19.00 625.00 438.00 -813.00 Pass STSO-1251 08/01/11 Mn-54 984.30 +/- 5.40 848.00 594.00 -1102.00 Pass STSO-1251 f 08/01/11 Sr-90 219.40 +/- 16.70 320.00 224.00 -416.00 Fail STSO-1 251 08/01/11 Zn-65 1639.90 +/- 11.40 1560.00 1092.00 - 2028.00 Pass STAP-1252 08/01/11 Co-57 5.06 +/- 0.08 5.09 3.56 - 6.62 Pass STAP-1 252 08/01/11 Co-60 3.13 +/- 0.09 3.20 2.24 -4.16 Pass STAP-1252 08/01/11 Cs-1 34 0.01 +/- 0.03 0.00 -0.10 -0.10 Pass STAP-1252 08/01/11 Cs-137 2.61 +/- 0.09 2.60 1.82 -3.38 Pass STAP-1252 08101/11 Mn-54 0.01 +/- 0.03 0.00 -0.10 -0.10 Pass STAP-1252 08/01/11 Sr-90 1.65 +/- 0.16 1.67 1.17 -2.17 Pass STAP-1 252 08/01/11 Zn-65 4.46 +/- 0.23 4.11 2.88 - 5.34 Pass STW-1 254 08/01/11 Co-57 37.20 +/- 0.50 36.60 25.60 -47.60 Pass STW-1 254 08/01/11 Co-60 28.80 +/- 0.40 29.30 20.50 -38.10 Pass STW-1 254 08/01/11 Cs-1 34 18.00 +/- 0.60 19.10 13.40 -24.80 Pass STW-1254 08/01/11 Cs-1 37 0.06 +/- 0.13 0.00 Pass STW-1254 08/01/11 H-3 1039.90 +/- 17.90 1014.00 710.00 - 1318.00 Pass STW-1254 08101/11 K-40 161.40 +/- 4.10 156.00 109.00 - 203.00 Pass STW-1254 08/01/11 Mn-54 25.70 +/- 0.50 25.00 17.50 -32.50 Pass STW-1254 08/01/11 Sr-90 15.60 +/- 1.80 14.20 9.90 - 18.50 Pass STW-1254 08/01/11 Zn-65 30.20 +/- 0.90 28.50 20.00 -37.10 Pass STW-1255 08/01/11 Gr. Alpha 0.72 +/- 0.12 0.87 0.26 -1.47 Pass STW-1 255 08/01/11 Gr. Beta 4.71 +/- 0.15 4.81 2.41 - 7.22 Pass a Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the Department of Energy's Mixed Analyte Performance Evaluation Program, Idaho Operations office, Idaho Falls, Idaho b Results are reported in units of Bq/kg (soil), Bq/L (water) or Bq/total sample (filters, vegetation).

0 Laboratory codes as follows: STW (water), STAP (air filter), STSO (soil), STVE (vegetation).

d MAPEP results are presented as the known values and expected laboratory precision (1 sigma, 1 determination) and control limits as defined by the MAPEP. A known value of "zero" indicates an analysis was included in the testing series as a "false positive". MAPEP does not provide control limits.

e No errors found in calculation or procedure, results of reanalysis; 1.73 Bq/filter.

f The analyses were repeated through a strontium column; mean result of triplicate analyses, 304.2 Bq/kg.

D-9

Intentionally left blank APPENDIX E EFFLUENT DATA

Intentionally left blank TABLE OF CONTENTS INTRODUCTION ............................................................................................................ 1 S UMMA R Y .......................................................................................................................... 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. NobleGases ....................................................................... 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

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 3587 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, 1-131, 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 2011 gaseous dose was vegetation. The critical pathway for 2011 liquid dose was potable water.

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 Total Effective Dose Equivalent (TEDE) due to licensed activities at Braidwood Station.calculated for the maximally exposed individual for the period is 2.62E+00 mrem. The annual limit on TEDE is 100 mrem.

The assessment of radiation doses to the public is performed in accordance with the ODCM. The results of these analyses confirm that the station is operating in compliance with 10CFR50 Appendix I, 10CFR20 and 40CFR1 90.

2

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

A total of 1.74E+00 curies of fission and activation gases were released with a maximum quarterly average release rate of 7.40E-02 pCi/sec at Unit 1 and 1.10E-01 pCi/sec at Unit 2.

A total of 4.80E-04 curies of radioiodine were released during the year with a maximum average quarterly release rate of 3.OOE-05 pCi/sec for Unit 1 and 2.95E-05 pCi/sec for Unit 2.

A total of 9.16E+00 curies of beta-gamma emitters were released as airborne particulate matter with a maximum average release rate of 1.44E-01 pCi/sec at Unit 1 and 1.84E-01 pCi/sec at Unit 2.

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

A total of 1.52E+03 curies of tritium were released with a maximum average quarterly release rate of 5.31 E+01 pCi/sec at Unit 1 and 6.03E+01 pCi/sec at Unit 2.

A total of 9.16E+00 curies of C-14 was released with a maximum average quarterly release rate of 1.44E-01 uCi/sec from Unit 1 and 1.66E-01 uCi/sec from Unit 2.

1.2 Liquids Released to Kankakee River A total of 2.48E+06 liters of radioactive liquid wastes (prior to dilution) containing 1.34E-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 1.03E-08 pCi/ml.

Alpha-emitting radionuclides were less than the LLD for the year. A total of 9.18E+02 curies of tritium was 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 disposal facility and various waste processors. For details, refer to the Braidwood Station 2011 Radioactive Effluent Release Report.

3

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 6.06E-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 7.89E-01 mrem (Table 3.4-1). The maximum gamma air dose was 1.87E-05 mrad (Table 3.1-1) based on measured effluents and average meteorological data and 2.95E-05 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 2

the skin is taken to have a thickness of 7.0 mg/cm and an occupancy factor of 1.0 is used. The skin dose from beta and gamma radiation for the year was 5.01 E-05 mrem based on concurrent meteorological data (Table 3.4-1).

The maximum offsite beta air dose for the year was 7.48E-05 mrad (Table 3.1-1) based on measured 4

effluents and average meteorological data and 7.24E-05 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. 1-131 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 1.93E+00 mrem (child/bone) based on measured effluents and average meteorological data and 2.37E+00 mrem based on concurrent meteorological data.

The maximum dose from radioactive iodine and particulate (including C-14) to the whole body was 6.06E-01 mrem (child) based on measured effluents and average meteorological data and 7.89E-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 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 Exelon Offsite Dose Calculation Manual. The maximum whole 5

body dose for the year was 2.98E-02 mrem and no organ dose exceeded 6.02E-02 mrem (Table 3.2-1 [child]).

3.3 Assessment of Dose to Member of Public During the period January to December, 2011, 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).

0 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 E. 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 for these measurements was 99.8% during 2011.

Nuclear Regulatory Commission, Regulatory Guide 1.109 (Rev. 1) 6

APPENDIX E-1 DATA TABLES AND FIGURES E-I. 1

Intentionally left blank Table 1.1-1 BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2011 GAS RELEASES UNIT 1 (Docket Number 50-456)

SUMMATION OF ALL RELEASES Units 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Est. Total A. Fission and Activation Gas Releases

1. Total Release Activity Ci 1.39E-01 5,82E-01 5.03E-03 3.00E-03 7.59

2. Average Release Rate iCi/sec 1.79E-02 7.40E-02 6.33E-04 3.77E-04

3. Percent of ODCM Limit - gamma % 2.56E-05 1.38E-04 8.02E-07 4,78E-07

4. Percent of ODCM Limit - beta % 5.67E-05 2.59E-04 1.95E-06 1.16E-06 B. Iodine Releases

1. Total Iodine Ci 1.41E-06. 2.36E-04 7.57E-06 7.30E-07 33.20

2. Average Release Rate .tCi/sec 1.81 E-07 3.OOE-05 9.52E-07 9.18E-08

3. Percent of ODCM Limit - gamma % 1.45E-05 1.81 E-04 1.45E-06 7.53E-06 C. Particulate (> 8 day half-life) Releases

1. Particulates with half-lives > 8 days Ci 1.04E+00 1.13E+00 1.08E+00 1.07E+00 19.80

2. Average Release Rate tiCi/sec 1.34E-01 1.44E-01 1.36E-01 1.35E-01

3. Percent of ODCM Limit % 2.91E+00 3.16E+00 3.03E+00 3.OOE+00

3. Gross Activity Ci <LLD <LLD <LLD <LLD D. Tritium Releases

1. Total Release Activity Ci 3.90E+01 4.17E+02 7.76E+01 1.86E+01 8.07

2. Average Release Rate igCi/sec 5.02E+00 5.31E+01 9.76E+00 2.34E+00

3. Percent of ODCM Limit % 7.58E-02 8.09E-01 1.50E-01 3.61E-01 E. Gross Alpha Releases

1. Total Release Activity Ci <LLD <LLD <LLD <LLD 19.80

2. Average Release Rate uCi/sec <LLD <LLD <LLD <LLD I 4

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

1. Total Release Activity I Ci I1.04E+00 I 1.13E+00 I 1.08E+00 I 1.07E+001

2. Average Release Rate gCi/sec 1.34E-01 1.44E-01 1.36E-01 1.35E-01 Note: LLD Values are included in Appendix A of this report.

E-1.2

Table 1.1-1 (cont.)

BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2011 GAS RELEASES UNIT 2 (Docket Number 50-457)

SUMMATION OF ALL RELEASES Units Ist Qtr 2nd Qtr 3rd Qtr 4th tr Estr ora A. Fission and Activation Gas Releases

1. Total Activity Released Ci 1.39E-01 8.66E-01 5.03E-03 3.OOE-03 7.59

2. Average Release Rate [tCi/sec 1.79E-02 1.10E-01 6.33E-04 3.77E-04

3. Percent of ODCM Limit- gamma % 2.56E-05 1.83E-04 8.02E-07 4.78E-07

4. Percent of ODCM Limit- beta % 5.67E-05 3.69E-04 1.95E-06 1.16E-06 B. Iodine Releases

1. Total Iodine Ci 8.41E-07 2.32E-04 1.77E-08 7.20E-07 33.20

2. Average Release Rate ACi/sec 1.08E-07 2.95E-05 2.23E-09 9.06E-08

3. Percent of ODCM Limit % 8.66E-06 1.65E-04 1.81 E-07 7.42E-06 C. Particulate (> 8 day half-life) Releases

1. Particulates with half-lives > 8 days Ci 1.13E+00 9.32E-01 1.32E+00 1.46E+00 19.80

2. Average Release Rate pCi/sec 1.45E-01 1.19E-01 1.66E-01 1.84E-01

3. Percent of OCDM Limit % 3.16E+00 2.61E+00 3.69E+00 4.10E+00

4. Gross Activity Ci <LLD <LLD <LLD <LLD D. Tritium Releases

1. Total Release Activity Ci 5.77E+01 4.74E+02 3.99E+02 3.69E+01 8.07]

2. Average Release Rate gCi/sec 7.42E+00 6.03E+01 5.02E+01 4.64E+00

3. Percent of ODCM Limit % 1.12E-01 9.19E-01 7.71E-01 7.17E-02 E. Gross Alpha Releases

1. Total Release Activity Ci <LLD <LLD <LLD <LLD 19.80

2. Average Release Rate

3. Percent of ODCM Limit g.Ci/sec 1~ <LLD N/A

<LLD N/A

<LLD N/A 4 <LLD N/A F. Carbon-14 Releases

1. Total R lease Activity Ci 11.13E+00 I 9.32E-01 11.32E+00 I1.46E+00 0

2. Average Release Rate ICi/sec 1.45E-01 1.19E-01 1.66E-01 1.84E-01 Note: LLD Values are included in Appendix A of this report.

E-1.3

Table 1.2-1 BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2011 LIQUID RELEASES UNIT 1 (Docket Number 50-456)

SUMMATION OF ALL RELEASES Units 1st Qtr 2ndo 3rd Qt r4 Est Total A. Fission and Activation Products

1. Total Release Ci 3,93E-02 2.54E-02 1.32E-03 1.14E-03 2.64

2. Average Diluted Concentration gCi/ml 1.03E-08 4.55E-09 3.52E-10 3.20E-10

3. Percent of applicable limit % ....

B. Tritium

1. Total Release Ci 1.10E+02 2.05E+02 5.90E+01 8.50E+01 5.85

2. Average Diluted Concentration pCi/ml 2.87E-05 3.67E-05 1.58E-05 2.38E-05

[3. % of Limit (1 E-2 gCi/ml) % 2.87E-01 3.67E-01 1.58E-01 2.38E-01 C. Dissolved Noble Gases

1. Total Release Ci 0.OOE+00 3.77E-05 0.OOE+00 O.OOE+00 2.64

2. Average Diluted Concentration pCi/ml 0.OOE+00 6.77E-12 0.OOE+00 0.OOE+00

3. % of Limit (2E-4 pCi/ml) % 0.OOE+00 [3.38E-06 0.OOE+00 0.OOE+00 D. Gross Alpha

11. Total Release Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 14.70 E.Volume of Waste Released liters 2.40E+05 4.52E+05 2.56E+05 2.90E+05]

(prior to dilution)

IF. Volume of Dilution Water I liters 17.62E+09 I1.11E+10 17.48E+09 17.14E+09 Note: LLD Values are included in Appendix A of this report.

Note: % Limit Values are included in Appendix B 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.

E-1.4

Table 1.2-1 (cont.)

BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2011 LIQUID RELEASES UNIT 2 (Docket Number 50-457)

SUMMATION OF ALL RELEASES Units lst Qtr 2nd Qtr 3rd Qtr 4th Qtr Est Total A. Fission and Activation Products

1. Total Release Ci 3.93E-02 2.54E-02 1.32E-03 1.14E-03 2.64

2. Average Diluted Concentration jCi/mI 1.03E-08 4.55E-09 3.52E-10 3.20E-10

3. Percent of applicable limit % * * *

B. Tritium

1. Total Release Ci 1.10E+02 2.05E+02 5.90E+01 8.50E+01 5.85

2. Average Diluted Concentration jtCi/ml 2.87E-05 3.67E-05 1.58E-05 2.38E-05

3. % of Limit (1E-2 iiCi/ml) % 2.87E-01 3.67E-01 1.58E-01 2.38E-01 C. Dissolved Noble Gases

1. Total Activity Released Ci 0.O0E+00 3.77E-05 0.OOE+00 O.QOE+00 2.64

2. Average Diluted Concentration gCi/mI 0.OOE+00 6.77E-12 0.OOE+00 0.O0E+00

3. % of Limit (2E-4 pCi/ml) % 0.O0E+00 3.38E-06 0.OOE+00 0.OOE+00 D. Gross Alpha

1. Total Release Ci 0.OOE+00 0.OOE+00 0.OOE+00 O.OOE+00 14.70 E. Volume of Waste Released liters 2.40E+05 4.52E+05 2.56E+05 2.90 (prior to dilution)

IF. Volume of Dilution Water I liters 17.62E+091 1.11E+10 17.48E+09 17.14E+09 Note: LLD Values are included in Appendix A of this report.

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

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

E-1.5

Table 3.1-1 GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ........... :.1 All Gas Release Types Period Start Date .... .. 01/01/2011 00:00 Period End Date ...... .. 01/01/2012 00:00 Period Duration (min): 5.256E+05 Coefficient Type ..... :.Historical Unit ................. : 1

--- RELEASE DATA Total Release Duration (minutes). ..................................... 5 .921E+05 Total Release Volume (cf) ........ ..................................... 7 .529E+10 Average Release Flowrate (cfm)... ..................................... 1.272E+05 Average Period Flowrate (cfm) .... ..................................... 1.432E+05

=== NUCLIDE DATA Average ECrcent Nuclide uCi uCi/cc Ratio EC AR-41 8.31E+01 3.90E-14 3.90E-06 1.00E-08 KR-85M 5.18E+00 2.43E-15 2.43E-08 1.00E-07 KR-85 0.00E+00 0.OOE+00 0.OOE+00 7. OOE-07 XE-133M 1. 28E+04 6.02E-12 1.00E-05 6.00E-07 KR-88 0. 00E+00 0.00E+00 0.00E+00 9.00E-09 XE-131M 0. OOE+00 0.00E+00 0.00E+00 2.00E-06 XE-135 6. 79E+04 3.19E-11 4.55E-04 7. OOE-08 XE-133 6. 49E+05 3.04E-10 6.08E-04 5. OOE-07 F&AG 7. 30E+05 3.42E-10 1.08E-03 1-131 1. 96E+01 9.17E-15 4.58E-05 2.OOE-10 1-132 2.19E+02 1.03E-13 5.13E-06 2. OOE-08 1-133 7. 72E+00 3.62E-15 3.62E-06 1. OOE-09 Iodine 2. 46E+02 1.15E-13 5.46E-05 BR-82 2. 75E+01 1.29E-14 2.58E-06 5.00E-09 Other 2. 75E+01 1.29E-14 2.58E-06 H-3 5. 52E+08 2.59E-07 2.59E+00 1. O0E-07 H-3 5.52E+08 2.59E-07 2.59E+00 CO-57 1. 10E+00 5.17E-16 5.75E-07 9.00E-10 C-14 4. 32E+06 2.02E-09 6.75E-01 3. OOE-09 CE-141 2. 39E+00 1.12E-15 1.40E-06 8. OOE-10 P>=8 4.32E+06 2.02E-09 6.75E-01 E-1.6

Table 3.1-1 (cont.)

GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ............ : 1 All Gas Release Types Period Start Date .... : 01/01/2011 00:00 Period End Date ...... : 01/01/2012 00:00 Period Duration (min): 5.256E+05 Coefficient Type ..... : Historical Unit ................. :

=== NUCLIDE DATA Average ECrcent Nuclide uCi uCi/cc Ratio EC Total 5.57E+08 2.61E-07 3.27E+00 E-1.7

Table 3.1-1 (cont.)

GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ........... :.1 All Gas Release Types Period Start Date .... .01/01/2011 00:00 Period End Date ...... :.01/01/2012 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 3. 44E-07 3. 44E-07 3. 44E-07 3. 44E-07 3. 44E-07 3.44E-07 0.00E+00 3. 44E-07 AINHL 2. 89E-03 1. 51E-02 1. 52E-02 1. 51E-02 1. 51E-02 1. 51E-02 0. 00E+00 1. 51E-02 AVEG 1. 42E-01 5. 46E-02 5.50E-02 5. 46E-02 5. 46E-02 5. 46E-02 0. 00E+00 5. 46E-02 ACMEAT 5. 29E-02 1. 43E-02 1. 44E-02 1. 43E-02 1. 43E-02 1. 43E-02 0. OOE+00 1. 43E-02 ACMILK 5. 77E-02 2. 04E-02 2. 18E-02 2. 04E-02 2. 04E-02 2. 04E-02 0.OOE+00 2. 04E-02 TGPD 3. 44E-07 3. 44E-07 3. 44E-07 3.44E-07 3. 44E-07 3.4 4E-07 0. 00E+00 3. 44E-07 TINHL 4.13E-03 1. 55E-02 1.55E-02 1.55E-02 1.55E-02 1. 55E-02 0.00E+00 1. 55E-02 TVEG 2.30E-01 7. 62E-02 7. 65E-02 7. 62E-02 7. 62E-02 7. 62E-02 0.00E+00 7. 62E-02 TCMEAT 4 .46E-02 1.12E-02 1. 12E-02 1. 12E-02 1. 12E-02 1. 12E-02 0.OOE+00 1. 12E-02 TCMILK 1. 06E-01 3.28E-02 3.50E-02 3.28E-02 3.28E-02 3. 28E-02 0. 00E+00 3. 28E-02 CGPD 3. 44E-07 3. 44E-07 3. 44E-07 3. 44E-07 3.44E-07 3. 44E-07 0.00E+00 3. 44E-07 CINHL 5. 70E-03 1. 41E-02 1. 41E-02 1.41E-02 1.41E-02 1.41E-02 0.00E+00 1. 41E-02 CVEG 5.56E-01 1.58E-01 1. 58E-01 1. 58E-01 1.58E-01 1. 58E-01 0.00E+00 1. 58E-01 CCMEAT 8. 40E-02 1. 96E-02 1.96E-02 1.96E-02 1. 96E-02 1. 96E-02 0. 00E+00 1. 96E-02 CCMILK 2. 62E-01 7. 05E-02 7. 49E-02 7. 05E-02 7.05E-02 7. 05E-02 0.00E+00 7. 05E-02 IGPD 3. 44E-07 3. 44E-07 3. 44E-07 3. 44E-07 3.4 4E-07 3. 44E-07 0.00E+00 3. 44E-07 IINHL 4.21E-03 8. 33E-03 8. 34E-03 8. 33E-03 8. 33E-03 8. 33E-03 0. OOE+00 8. 33E-03 ICMILK 5. 13E-01 1. 37E-01 1. 48E-01 1.37E-01 1. 37E-01 1. 37E-01 0. 00E+00 1. 37E-01 PERIOD DOSE BY AGEGROUP, ORGAN (mrem)

Agegroup Bone Liver Thyroid Kidney Lung GI-Lli Skin TB ADULT 2.56E-01 1.05E-01 1.06E-01 1.05E-01 1.05E-01 1.05E-01 0. 00E+00 1. 05E-01 TEEN 3.86E-01 1.36E-01 1. 38E-01 1.36E-01 1.36E-01 1. 36E-01 0.00E+.00 1. 36E-01 CHILD 9.08E-01 2.62E-01 2. 67E-01 2.62E-01 2.62E-01 2. 62E-01 0.00E+00 2. 62E-01 INFANT 5.17E-01 1.45E-01 1.56E-01 1.45E-01 1. 45E-01 1. 45E-01 0.00E+00 1. 45E-01 E-1.8

Table 3.1-1 (cont.)

GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ........... : 1 All Gas Release Types Period Start Date .... : 01/01/2011 00:00 Period End Date ...... : 01/01/2012 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 9.08E-(

Qrtr->End CHILD BONE 9.08E-( )1 31-day 2.25E-01 4.03E+02 3.OOE-01 3.03E+02 Year->End CHILD BONE 9.08E-( )1 Quarter 5.63E+00 1.61E+01 7.50E+00 1.21E+01

)I Annual 1.13E+01 8.07E+00 1.50E+01 6. 05E+00 Critical Pathway ........ :.2 Vegetation (VEG)

Major Contributors ...... .. 0.0 % or greater to total Nuclide Percentage H-3 0.OOE+00 C-14 1.00E+02 1-131 1.66E-03 1-132 !.75E-05 1-133 1.08E-05 CE-141 2.36E-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 Qrtr->End CHILD TBODY 2.62E-0 1 31-day 1.50E-01 1.75E+02 2.OOE-01 1.31E+02 Year->End CHILD TBODY 2.62E-0 1 Quarter 5.25E+00 4.99E+00 7.50E+00 3.49E+00 2.62E-0 1 Annual 1.05E+01 2.50E+00 1.50E+01 1.75E+00 Critical Pathway ........ .. 2 Vegetation (VEG)

Major Contributors ...... :.0.0 % or greater to total Nuclide Percentage H-3 3.07E+01 C-14 6.95E+01 1-131 3.32E-03 1-132 5.99E-05 1-133 1.95E-05 CE-141 6.60E-06 E-1.9

Table 3.1-1 (cont.)

GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ........... .. 1 All Gas Release Types Period Start Date .... .. 01/01/2011 00:00 Period End Date ...... :.01/01/2012 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 8. 22E-06 Qrtr->End Gamma 8.22E-06 31-day 1.50E-01 5.48E-03 2. OOE-01 4. 1lE-03 Year->End Gamma 8.22E-06 Quarter 3. 75E+00 2. 19E-04 5. OOE+00 1. 64E-04 Annual 7.50E+00 1. lOE-04 1. OOE+01 8. 22E-05 Major Contributors ...... :.0.0 % or greater to total Nuclide Percentage AR-41 2.12E-01 KR-85M 1.75E-03 KR-85 0.OOE+00 XE-133M 1.15E+00 KR-88 0.OOE+00 XE-131M 0.00E+00 XE-135 3.58E+01 XE-133 6.28E+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 3.19E-05 Qrtr->End Beta 3.19E-05 31-day 3. OOE-01 1. 06E-02 4 . OOE-01 7. 98E-03 Year->End Beta 3.19E-05 Quarter 7. 50E+00 4. 26E-04 1.OOE+01 3. 19E-04 Annual 1. 50E+01 2. 13E-04 2. OOE+01 1. 60E-04 Major Contributors ...... .. 0.0 % or greater to total Nuclide Percentage AR-41 3.14E-02 KR-85M 1.18E-03 KR-85 0.OOE+00 XE-133M 2.19E+00 KR-88 0.OOE+00 XE-131M 0.OOE+00 XE-135 1.93E+01 XE-133 7.85E+01 E-1.10

Table 3.1-1 (cont.)

GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ........... : 1 All Gas Release Types Period Start Date.....: 01/01/2011 00:00 Period End Date ...... : 01/01/2012 00:00 Period Duration (min): 5.256E+05 Coefficient Type ..... : Historical Unit ................. : 2

=== RELEASE DATA Total Release Duration (minutes) ............................ .......... 5.597E+05 Total Release Volume (cf) ................................... .......... 6.877E+I 0 Average Release Flowrate (cfm) .............................. .......... 1.229E+05 Average Period Flowrate (cfm ) ............................... .......... 1.308E+05

=== NUCLIDE DATA Average ECrcent Nuclide uCi uCi/cc Ratio EC AR-41 8.31E+01 4.27E-14 4.27E-06 1.OOE-08 KR-85M 5.18E+00 2.66E-15 2.66E-08 1.OOE-07 KR-85 0.OOE+00 0.00E+00 0.OOE+00 7. OOE-07 XE-133M 1.28E+04 6.59E-12 1.10E-05 6.OOE-07 KR-88 0.00E+00 0.OOE+00 0.OOE+00 9.00E-09 XE-131M 0.OOE+00 0.OOE+00 O.OOE+00 2.OOE-06 XE-135 6.79E+04 3.49E-11 4.98E-04 7. OOE-08 XE-133 9.33E+05 4.79E-10 9.58E-04 5.OE-07 F&AG 1.01E+06 5.20E-10 1.47E-03 1-131 1. 73E+01 8.90E-15 4.45E-05 2. OOE-10 1-132 2.17E+02 1. lIE-13 5.56E-06 2. OOE-08 1-133 3. 11E-03 1. 60E-18 1.60E-09 1.OOE-09 Iodine 2. 34E+02 1. 20E-13 5.01E-05 BR-82 5.21E-01 2. 68E-16 5.36E-08 5.OOE-09 Other 5.21E-01 2. 68E-16 5.36E-08 H-3 9. 67E+08 4. 97E-07 4.97E+00 1. OOE-07 H-3 9. 67E+08 4. 97E-07 4.97E+00 SN-113 1. 61E+00 8.24E-16 1.03E-06 8. OOE-10 C-14 4.84E+06 2. 48E-09 8.28E-01 3.OOE-09 CO-60 1.96E-03 1. 01E-18 2.01E-08 5.OOE-11 P>=8 4.84E+06 2. 48E-09 8.28E-01 E-1.11

Table 3.1-1 (cont.)

GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ............ : 1 All Gas Release Types Period Start Date .... : 01/01/2011 00:00 Period End Date ...... : 01/01/2012 00:00 Period Duration (min): 5.256E+05 Coefficient Type ..... Historical Unit ................. 2 NUCLIDE DATA Average ECrcent Nuclide uCi uCi/cc Ratio EC Total 9.73E+08 5.OOE-07 5.80E+00 E-1.12

Table 3.1-1 (cont.)

GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ........... : 1 All Gas Release Types Period Start Date .... : 01/01/2011 00:00 Period End Date ...... : 01/01/2012 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 3.21E-07 3.21E-07 3. 21E-07 3.21E-07 3. 21E-07 3.21E-07 0. OOE+00 3.21E-07 AINHL 3.24E-03 2. 62E-02 2. 62E-02 2.62E-02 2. 62E-02 2. 62E-02 0.00E+00 2.62E-02 AVEG 1.60E-01 7. 78E-02 7. 81E-02 7.78E-02 7.78E-02 7. 78E-02 0. OOE+00 7. 78E-02 ACMEAT 5.93E-02 1.85E-02 1.85E-02 1. 85E-02 1. 85E-02 1. 85E-02 0.OOE+00 1. 85E-02 ACMILK 6.46E-02 2. 84E-02 2. 97E-02 2.84E-02 2. 84E-02 2. 84E-02 0. OOE+00 2. 84E-02 TGPD 3.21E-07 3.21E-07 3. 21E-07 3. 21E-07 3. 21E-07 3. 21E-07 0.OOE+00 3.21E-07 TINHL 4 .63E-03 2. 67E-02 2. 67E-02 2. 67E-02 2. 67E-02 2. 67E-02 0.OOE+00 2.67E-02 TVEG 2. 58E-01 1.04E-01 1. 05E-01 1.04E-01 1. 04E-01 1. 04E-01 0.OOE+00 1. 04E-01 TCMEAT 5. OOE-02 1.39E-02 1. 40E-02 1.39E-02 1. 39E-02 1.39E-02 0.OOE+00 1.39E-02 TCMILK 1.19E-01 4.40E-02 4. 60E-02 4 .40E-02 4 .40E-02 4.40E-02 0.OOE+00 4.40E-02 CGPD 3.21E-07 3. 21E-07 3.21E-07 3.21E-07 3.21E-07 3.21E-07 0.OOE+00 3.21E-07 CINHL 6.39E-03 2. 40E-02 2. 40E-02 2. 40E-02 2. 40E-02 2. 40E-02 0.OOE+00 2. 40E-02 CVEG 6.23E-0i 2.06E-01 2. 07E-01 2.06E-01 2. 06E-01 2. 06E-01 0.OOE+00 2.06E-01 CCMEAT 9.4 2E-02 2. 36E-02 2. 37E-02 2.36E-02 2. 36E-02 2. 36E-02 0.OOE+00 2.36E-02 CCMILK 2. 94E-01 9.05E-02 9. 44E-02 9.05E-02 9. 05E-02 9. 05E-02 0. OOE+00 9. 05E-02 IGPD 3. 21E-07 3.21E-07 3. 21E-07 3.21E-07 3.21E-07 3.21E-07 0. OOE+00 3.21E-07 IINHL 4 .72E-03 1. 41E-02 1. 41E-02 1.41E-02 1. 41E-02 1. 41E-02 0. OOE+00 1. 41E-02 ICMILK 5.75E-01 1. 71E-01 1. 81E-01 1. 71E-01 1.71E-01 1.71E-01 0. OOE+00 1.71E-01 PERIOD DOSE BY AGEGROUP, ORGAN (mrem)

Agegroup Bone Liver Thyroid Kidney Lung GI-Lli Skin TB ADULT 2.87E-01 1.51E-01 1.52E-01 1.51E-01 1. 51E-01 1. 51E-01 0. OOE+00 1.51E-01 TEEN 4.32E-01 1.89E-01 1.91E-01 1.89E-01 1.89E-01 1.89E-01 0.OOE+00 1.89E-01 CHILD 1.02E+00 3.44E-01 3.49E-01 3.44E-01 3. 44E-01 3. 44E-01 0.OOEE+00 3. 44E-01 INFANT 5.80E-01 1.85E-01 1.95E-01 1.85E-01 1. 85E-01 1. 85E-01 0.OOE+00 1. 85E-01 E- 1.13

Table 3.1-1 (cont.)

GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ........... : 1 All Gas Release Types Period Start Date .... : 01/01/2011 00:00 Period End Date ...... : 01/01/2012 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 Qrtr->End CHILD BONE 1.02E+0 0 31-day 2.25E-01 4.52E+02 3.OOE-01 3.39E+02 Year->End CHILD BONE 1.02E+0 0 Quarter 5.63E+00 1.81E+01 7.50E+00 1.36E+01 1.02E+0 0 Annual 1.13E+01 9.04E+00 1.50E+01 6.78E+00 Critical Pathway ......... : 2 Vegetation (VEG)

Major Contributors ...... .. 0.0 % or greater to total Nuclide Percentage H-3 0.OOE+00 C-14 1.OOE+02 CO-60 2.46E-06 1-131 1.32E-03 1-132 1.54E-05 1-133 3.87E-09

=== 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 Qrtr->End CHILD TBODY 3.44E-0 1 31-day 1.50E-01 2.30E+02 2.OOE-01 1.72E+02 Year->End CHILD TBODY 3.44E-0 1 Quarter 5.25E+00 6.56E+00 7.50E+00 4.59E+00 3.44E-0 1 Annual 1.05E+01 3.28E+00 1.50E+01 2.30E+00 Critical Pathway ........ 2 Vegetation (VEG)

Major Contributors ...... .. 0.0 % or greater to total Nuclide Percentage H-3 4.09E+01 C-14 5.89E+01 CO-60 7.69E-06 1-131 2.24E-03 1-132 4.50E-05 1-133 5.98E-09 E- 1.14

Table 3.1-1 (cont.)

GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ........... : 1 All Gas Release Types Period Start Date .... : 01/01/2011 00:00 Period End Date ...... : 01/01/2012 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 1.05E-05 Qrtr->End Gamma 1.05E-05 31-day 1.50E--01 6.99E-03 2.00E-01 5.24E-03 Year->End Gamma 1.05E-05 Quarter 3.75E-+00 2.80E-04 5.OOE+00 2.10E-04 Annual 7.50E +00 1.40E-04 1.OOE+01 1.05E-04 Major Contributors ...... .. 0.0 % or greater to toltal Nuclide Percentage AR-41 1.66E-01 KR-85M 1.37E-03 KR-85 0.00E+00 XE-133M 9.03E-01 KR-88 0.OOE+00 XE-131M 0.OOE+00 XE-135 2.81E+01 XE-133 7.09E+0!

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 4.29E-05 Qrtr->End Beta 4.29E-05 31-day 3.OOE-01 1.43E-02 4.OOE-01 1.07E-02 Year->End Beta 4.29E-05 Quarter 7.50E+00 5.72E-04 1.OOE+01 4.29E-04 Annual 1.50E+01 2.86E-04 2.OOE+01 2.15E-04 Major Contributors ...... :.0.0 % or greater to total Nuclide Percentage AR-41 2.34E-02 KR-85M 8.75E-04 KR-85 0.OOE+00 XE-133M 1.63E+00 KR-88 0.OOE+00 XE-131M 0.OOE+00 XE-135 1.43E+01 XE-133 8.40E+01 E-1.15

Table 3.2-1 LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT)

Release ID ............ 1 All Liquid Release Types Period Start Date ..... : 01/01/2011 00:00 Period End Date ....... :.01/01/2012 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) ..................................... 1.186E+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 CO-57 2.63E+02 NB-97 8.44E+02 AG-l10 6.33E+00 SN-113 1.76E+02 SB-124 7.27E+00 SB-125 2.42E-03 BA-133 4.30E+00 TE-123M 2.94E+01 CR-51 2.09E+02 MN-54 1.56E+03 FE-59 4.50E+01 CO-58 1.17E+04 CO-60 2.69E+04 ZN-65 1.28E+02 ZR-95 1.28E+02 ZR-97 2.35E+01 NB-95 3.23E+02 AG-11OM 9.57E+02 1-134 7.73E+00 CS-134 1.78E+00 CS-137 1.32E+01 LA-140 1.76E+00 CE-144 3.26E+01 Gamma 4.58E+04 AR-41 2.05E+00 XE-135M 3.35E+00 XE-133 3.23E+01 E- 1.16

Table 3.2-1 (cont.)

LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT)

Release ID ............ :.1 All Liquid Release Types Period Start Date ..... :.01/01/2011 00:00 Period End Date ....... .. 01/01/2012 00:00 Period Duration (mins): 5.256E+05

=== NUCLIDE DATA Nuclide uCi D&EG 3.77E+01 H-3 4.58E+08 FE-55 2.11E+04 NI-63 2.62E+02 Beta 4.58E+08 Total 4.58E+08 E- 1.17

Table 3.2-1 (cont.)

LIQUID RELEASE AND DOSE

SUMMARY

REPORT

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

Release ID ............ : 1 All Liquid Release Types Period Start Date ..... : 01/01/2011 00:00 Period End Date ....... : 01/01/2012 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 1. 29E-05 8. 69E-03 8. 68E-03 8. 68E-03 8.68E-03 8.87E-03 0. OOE+00 8.70E-03 AFWFSp 8. 07E-04 4 .72E-03 3. 60E-03 3. 89E-03 3. 76E-03 2. 12E-02 0.OOE+00 4.42E-03 TPWtr 1. 23E-05 6. 13E-03 6. 11E-03 6. 12E-03 6. 12E-03 6.23E-03 0. 00E+OO 6. 14E-03 TFWFSp 8.35E-04 3.90E-03 2. 76E-03 3.05E-03 2.96E-03 1. 51E-02 0.OOE+00 3.54E-03 CPWtr 3. 73E-05 1. 18E-02 1. 17E-02 1. 17E-02 1. 17E-02 1. 18E-02 0.0 0E+00 1. 18E-02 CFWFSp 1. 07E-03 3. 27E-03 2 .29E-03 2.51E-03 2. 46E-03 6. 68E-03 0. 00E+00 3.07E-03 IPWtr 2. 91E-05 1. 16E-02 1. 15E-02 1. 15E-02 1. 15E-02 1. 16E-02 0.OOE+00 1.16E-02 PERIOD DOSE BY AGEGROUP, ORGAN (mrem)

Agegroup Bone Liver Thyroid Kidney Lung GI-Lli Skin TB ADULT 8.20E-04 1.34E-02 1.23E-02 1.26E- 1.24E-02 3.O1E-02 0.00E+00 1. 31E-02 TEEN 8.47E-04 1.OOE-02 8.88E-03 9.16E- 9.08E-03 2.14E-02 0.00E+00 9. 67E-03 CHILD 1.10E-03 1.50E-02 1.40E-02 1.43E- 1.42E-02 1. 85E-02 0.00E+00 1. 49E-02 INFANT 2.91E-05 1.16E-02 1.15E-02 1.15E- 1. 15E-02 1. 16E-02 0. OOE+00 1. 16E-02 E-1.18

Table 3.2-1 (cont.)

LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT)

Release ID............... 1 All Liquid Release Types Period Start Date ....... 01/01/2011 00:00 Period End Date ......... 01/01/2012 00:00 Period Duration (mins): 5.256E+05 Unit.....................1I 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 ADULT GILLI Strt->End ADULT 3.01E-02 31-day 1. 50E-01 2. 01E+01 2. OOE-01 1. 50E+01 GILLI Qrtr->End ADULT 3.01E-02 Quarter 3.75E+00 8.02E-01 5. 00E+00 6. 02E-01 GILLI Year->End 3.01E-02 Annual 7.50E+00 4. 0iE-01 1.OOE+01 3. 01E-01 Critical Pathway ......... 1 Fresh Water Fish - Sport (FFSP)

Major Contributors ....... 0.0 % or greater to total Nuclide Percentage H-3 4.09E+01 CR-51 5.92E-03 MN-54 1.84E+00 FE-55 4.92E-01 FE-59 3.26E-02 CO-58 1.92E+00 CO-60 1.18E+01 NI-63 1.05E-02 ZN-65 5.19E-01 ZR-95 4.52E-03 ZR-97 2.82E-03 NB-95 4.26E+01 AG-II1M 5.39E-02 1-134 6.95E-09 CS-134 1.92E-03 CS-137 1.17E-02 LA-140 9.24E-04 CE-144 3.56E-03

--- 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 1.49E-02 31-day 4.50E-02 3.30E+01 6.00E-02 2.48E+01 Qrtr->End CHILD TBODY 1.49E-02 Quarter 1.13E+00 1.32E+00 1.50E+00 9.91E-01 Year->End CHILD TBODY 1.49E-02 Annual 2.25E+00 6.61E-01 3.00E+00 4.95E-01 Critical Pathway ......... : 0 Potable Water (PWtr)

Major Contributors ...... :.0.0 % or greater to total Nuclide Percentage E-1.19

Table 3.2-1 (cont.)

LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT)

Release ID .............. : I All Liquid Release Types Period Start Date ..... : 01/01/2011 00:00 Period End Date ....... : 01/01/2012 00:00 Period Duration (mins): 5.256E+05 Major Contributors ...... :.0.0 % or greater to total Nuclide Percentage H-3 9.42E+0i CR-51 5.29E-05 MN-54 2.50E-01 FE-55 5.79E-01 FE-59 8.68E-03 CO-58 4.88E-01 CO-60 3.19E+00 NI-63 6.93E-02 ZN-65 8.07E-01 ZR-95 3.19E-06 ZR-97 1.54E-08 NB-95 8.41E-03 AG-11OM 2.68E-04 1-134 7.53E-06 CS-134 4.00E-02 CS-137 !.70E-01 LA-140 8.61E-09 CE-144 2.83E-06 E-1.20

Table 3.2-1 (cont.)

LIQUID RELEASE AND DOSE

SUMMARY

REPORT

- (PERIOD BASIS - BY UNIT)

Release ID .............. 1 All Liquid Release Types Period Start Date ..... :.01/01/2011 00:00 Period End Date ....... :.01/01/2012 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) ..................................... 1.186E+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 CO-57 2.63E+02 NB-97 8.44E+02 AG-l10 6.33E+00 SN-113 1.76E+02 SB-124 7.27E+00 SB-125 2.42E+03 BA-133 4.30E+00 TE-123M 2.94E+01 CR-51 2.09E+02 MN-54 1.56E+03 FE-59 4.50E+01 CO-58 1.17E+04 CO-60 2.69E+04 ZN-65 1.28E+02

ýZR-95 1.28E+02 ZR-97 2.35E+01 NB-95 3.23E+02 AG-1IOM 9.57E+02 1-134 7.73E+00 CS-134 1.78E+00 CS-137 1.32E+01 LA-140 1.76E+00 CE-144 3.26E+01 Gamma 4.58E+04 AR-41 2.05E+00 XE-135M 3.35E+00 XE-133 3.23E+01 E-1.21

Table 3.2-1 (cont.)

LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT)

Release ID .............. I All Liquid Release Types Period Start Date ..... :.01/01/2011 00:00 Period End Date ....... :.01/01/2012 00:00 Period Duration (mins): 5.256E+05 NUCLIDE DATA Nuclide uCi D&EG 3.77E+01 H-3 4.58E+08 FE-55 2.11E+04 NI-63 2.62E+02 Beta 4.58E+08 Total 4.58E+08 E-1.22

Table 3.2-1 (cont.)

LIQUID RELEASE AND DOSE

SUMMARY

REPORT

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

Release ID ............ :.1 All Liquid Release Types Period Start Date ..... :.01/01/2011 00:00 Period End Date ....... :.01/01/2012 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 1.29E-05 8.69E-03 8.68E-03 8.68E-03 8.68E-03 8.87E-03 0.00E+00 8.70E-03 AFWFSp 8.07E-04 4.72E-03 3.60E-03 3.89E-03 3.76E-03 2.12E-02 0.00E+00 4.42E-03 TPWtr 1.23E-05 6.13E-03 6.11E-03 6.12E-03 6.12E-03 6.23E-03 0.00E+00 6.14E-03 TFWFSp 8.35E-04 3.90E-03 2.76E-03 3.05E-03 2.96E-03 1.51E-02 0.00E+00 3.54E-03 CPWtr 3.73E-05 1.18E-02 1.17E-02 1.17E-02 1.17E-02 1.18E-02 0.OOE+00 1.18E-02 CFWFSp 1.07E-03 3.27E-03 2.29E-03 2.51E-03 2.46E-03 6.68E-03 0.OOE+00 3.07E-03 IPWtr 2.91E-05 1.16E-02 1.15E-02 1.15E-02 1.15E-02 1.16E-02 0.00E+00 1.16E-02

== PERIOD DOSE BY AGEGROUP, ORGAN (mrem)

Agegroup Bone Liver Thyroid Kidney Lung GI-Lli Skin TB ADULT 8.20E-04 1.34E-02 1.23E-02 1.26E-02 1.24E-02 3.01E-02 0.OOE+00 1.31E-02 TEEN 8.47E-04 1.OOE-02 8.88E-03 9.16E-03 9.08E-03 2.14E-02 0.00E+00 9.67E-03 CHILD 1.10E-03 1.50E-02 1.40E-02 1.43E-02 1.42E-02 1.85E-02 0.OOE+00 1.49E-02 INFANT 2.91E-05 1.16E-02 1.15E-02 1.15E-02 1.15E-02 1.16E-02 0.00E+00 1.16E-02 E-1.23

Table 3.2-1 (cont.)

LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT)

Release ID ............ : 1 All Liquid Release Types Period Start Date......: 01/01/2011 00:00 Period End Date ....... : 01/01/2012 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 3. 01E-02 31-day 1. 50E-01 2. 01E+01 2. OOE-01 1. 50E+01 Qrtr->End ADULT GILLI 3. 01E-02 Quarter 3. 75E+00 8.02E-01 5. OOE+00 6.02E-01 Year->End ADULT GILLI 3.01E-02 Annual 7. 50E+00 4. 01E-01 1. OOE+01 3. 01E-01 Critical Pathway ....... 1 Fresh Water Fish - Sport (FFSP)

Major Contributors ..... 0.0 % or greater to total Nuclide Percentage H-3 4.09E+01 CR-51 5.92E-03 MN-54 1.84E+00 FE-55 4.92E-0!

FE-59 3.26E-02 CO-58 1.92E+00 CO-60 1.18E+01 NI-63 1.05E-02 ZN-65 5.19E-01 ZR-95 4.52E-03 ZR-97 2.82E-03 NB-95 4.26E+01 AG-i1OM 5.39E-02 1-134 6.95E-09 CS-134 1.92E-03 CS-137 1.17E-02 LA-140 9.24E-04 CE-144 3.56E-03

=== 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 Qrtr->End CHILD TBODY 1.4 9E-0 2 31-day 4.50E-02 3.30E+01 6.OOE-02 2. 48E+01 Year->End CHILD TBODY 1.49E-0 2 Quarter 1.13E+00 1.32E+00 1. 50E+00 9. 91E-01 1.49E-0 2 Annual 2.25E+00 6.61E-01 3.OOE+00 4. 95E-01 Critical Pathway ........ .. 0 Potable Water (PWtr)

Major Contributors ...... :.0.0 % or greater to total Nuclide Percentage E- 1.24

Table 3.2-1 (cont)

LIQUID RELEASE AND DOSE

SUMMARY

REPORT

(PERIOD BASIS - BY UNIT)

Release ID .............. : I All Liquid Release Types Period Start Date ..... : 01/01/2011 00:00 Period End Date ....... : 01/01/2012 00:00 Period Duration (mins): 5.256E+05 Major Contributors ...... 0.0 % or greater to total Nuclide Percentage H-3 9.42E+01 CR-51 5.29E-05 MN-54 2.50E-01 FE-55 5.79E-01 FE-59 8.68E-03 CO-58 4.88E-01 CO-60 3.19E+00 NI-63 6.93E-02 ZN-65 8.07E-01 ZR-95 3.19E-06 ZR-97 1.54E-08 NB-95 8.41E-03 AG-1OM 2.68E-04 1-134 7.53E-06 CS-134 4.OOE-02 CS-137 1.70E-01 LA-140 8.61E-09 CE-144 2.83E-06 E-1.25

Table 3-3.1 Braidwood Nuclear Station Unit I 10 CFR 20 Compliance Assessment Period of Assessment: 1/1/11 through 12/31/11 Calculated 4/23/12 10 CFR 20.1301 (a)(1) Compliance Total Effective Dose Equivalent (TEDE) mrem/year 9.60E-01 10 CFR 20.1301(a)(1) limit mrem/year 100.00

% of limit 0.96 Compliance Summary 1 st Qtr 2nd Qtr 3r Qtr 4th Qtr Total TEDE (mrem) 2.42E-01 2.49E-0 1 2.33E-01 2.36E-01 9.60E-0 I E-1.26

Table 3-3.1 (cont.)

Braidwood Nuclear Station Unit 2 10 CFR 20 Compliance Assessment Period of Assessment: 1/1/11 through 12/31/11 Calculated 4/23/12 10 CFR 2 0.1301 (a)(I) Compliance Total Effective Dose Equivalent (TEDE) mrem/year 1.07E+00 10 CFR 20.1301(a)(1) limit mrem/year 100.00

% of limit 1.07 Compliance Summary 1" Qtr 2nd Qtr 3 rd Qtr 4th Qtr Total TEDE (mrem) 2.60E-01 2.08E-01 2.83E-01 3.19E-01 1.07E+00 E-1.27

Table 3.4-1 Doses Resultina from Airborne Releases The following are the maximum annual calculated cumulative offsite doses resulting from Braidwood Station airborne releases.

Unit 1:

Dose Maximum Value Sector Affected gamma air (1) 1.300 x 10' mrad North beta air (2) 3.090 x 10s mrad North whole body (3) 3.384 x 101 mrem North skin (4) 2.210 x 10-5 mrem North organ (6)(child-bone) 1.112 x 10+°mrem North Unit 1 Compliance Status 10 CFR 50 Appendix I Yearly Objective % of Appendix I gamma air 10.0 mrad 0.00 beta air 20.0 mrad 0.00 whole body 5.0 mrem 6.77 skin 15.0 mrem 0.00 organ 15.0 mrem 7.41 Unit 2:

Dose Maximum Value Sector Affected gamma air (1) 1.650 x 10.6 mrad North beta air (2) 4.150 x 10i5 mrad North whole body (3) 4.508 x 10-1 mrem North skin (4) 2.800 x 10-5 mrem North organ (6)(child-bone) 1.258 x 10+0 mrem North Unit 2 Compliance Status 10 CFR 50 Appendix I Yearly Objective % of Appendix I gamma air 10.0 mrad 0.00 beta air 20.0 mrad 0.00 whole body 5.0 mrem 9.02 skin 15.0 mrem 0.00 organ 15.0 mrem 8.39 (1) Gamma Air Dose - GASPAR II, NUREG-0597 (2) Beta Air Dose - GASPAR 1I,NUREG-0597 (3) Whole Body Dose - GASPAR 1I,NUREG-0597 (4) Skin Dose - GASPAR 1I,NUREG-0597 (5) Inhalation and Food Pathways Dose - GASPAR 11,NUREG-0597 E-1.28

Intentionally left blank APPENDIX F METEOROLOGICAL

Intentionally left blank Braidwood Generating Station Period of Record: January - March 2011 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 2 2 0 0 0 4 NE 0 6 10 0 0 0 16 ENE 0 11 4 0 0 0 15 E 0 7 2 0 0 0 9 ESE 0 0 3 0 0 0 3 SE 0 0 1 2 0 0 3 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 3 3 0 0 6 SW 0 0 0 0 0 0 0 WSW 0 0 4 1 1 0 6 W 0 2 4 6 0 0 12 WNW 0 7 12 3 0 0 22 NW 0 8 13 0 0 0 21 NNW 0 0 4 3 0 0 7 Variable 0 0 0 0 0 0 0 Total 0 43 62 19 I 0 125 Hours of calm in this stability class: 0 Hours of missing wind measurements in this sta bility class: 2 Hours of missing stability measurements in all stability classes: 4 F-i

Braidwood Generating Station Period of Record: January - March 2011 Stability Class - Moderately Unstable - 199Ft-3OFt 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 2 0 3 NNE 0 3 0 0 3 NE 0 1 5 0 6 ENE 0 3 3 0 6 E 0 5 1 0 6 ESE 0 2 0 0 2 SE 0 0 2 0 2 SSE 0 0 1 0 1 S 0 0 0 4 SSW 0 1 1 0 4 SW 0 0 2 0 3 WSW 0 0 5 0 6 W 0 2 0 5 1

WNW 0 3 0 4 NW 0 7 7 0 14 NNW 0 5 2 0 8 Variable 0 0 0 0 0 Total 0 33 34 9 1 0 77 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 2011 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 NNE 7 NE 9 ENE 8 E 2 ESE 2 SE 3 SSE 7 S 2 SSW 8 SW 10 WSW 14 W 16 WNW 9 NW 6 NNW 9 Variable 1 Total 0 54 44 16 1 0 115 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 F-3

Braidwood Generating Station Period of Record: January - March 2011 Stability Class - Neutral - 199Ft-3OFt 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 14 56 8 0 78 NNE 2 13 26 7 0 48 NE 2 46 45 1 0 94 ENE 8 65 23 0 0 96 E 5 32 8 0 0 45 ESE 1 12 9 0 0 22 SE 1 19 33 7 0 60 SSE 1 29 27 4 0 61 S 0 8 43 7 0 58 SSW 0 12 32 15 0 59 SW 1 26 55 9 1 92 WSW 3 35 16 6 0 60 W 7 31 17 8 1 64 WNW 11 63 39 0 0 113 NW 9 32 24 1 0 66 NNW 4 26 34 8 0 72 Variable 2 0 0 0 0 2 Total 57 463 487 81 2 0 1090 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: 4 F-4

Braidwood Generating Station Period of Record: January - March 2011 Stability Class - Slightly Stable - 199Ft-3OFt 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 6 0 0 9 NNE 5 11 1 0 18 NE 11 22 1 7 46 ENE 18 35 3 0 56 E 22 10 0 0 32 ESE 5 10 6 0 21 SE 1 20 10 0 31 SSE 1 13 5 0 19 S 0 4 22 17 43 SSW 1 6 21 13 43 SW 0 20 47 10 77 WSW 4 25 7 3 39 W 11 22 12 7 52 WNW 18 43 12 3 76 NW 18 23 6 0 47 NNW 8 19 1 0 28 Variable 0 0 0 0 0 Total 126 289 154 60 8 0 637 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 13 Hours of missing stability measurements in all stability classes: 4 F-5

Braidwood Generating Station Period of Record: January - March 2011 Stability Class - Moderately Stable - 199Ft-3OFt 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 1 0 0 0 0 0 1 NE 3 0 0 0 0 0 3 ENE 5 0 0 0 0 0 5 E 5 0 0 0 0 0 5 ESE 4 1 0 0 0 0 5 SE 1 0 0 0 0 0 1 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 1 0 0 0 0 0 1 SW 3 1 0 0 0 0 4 WSW 0 12 0 0 0 0 12 W 7 20 0 0 0 0 27 WNW 9 3 0 0 0 0 12 NW 7 0 0 0 0 0 7 NNW 3 1 0 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 49 38 0 0 0 0 87 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-6

Braidwood Generating Station Period of Record: January - March 2011 Stability Class - Extremely Stable - 199Ft-3OFt 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

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 0 4 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 F-7

Braidwood Generating Station Period of Record: January - March 2011 Stability Class - Extremely Unstable - 199Ft-3OFt 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 NNE 0 0 2 NE 0 0 15 ENE 0 5 18 E 0 1 11 ESE 0 0 3 SE 0 0 3 SSE 0 0 0 S 0 0 0 SSW 0 0 6 SW 0 0 0 WSW 0 0 4 W 0 0 7 WNW 0 3 23 NW 0 4 28 NNW 0 0 6 Variable 0 0 0 Total 0 13 49 43 17 5 127 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 0 Hours of missing stability measurements in all sta bility cl asses: 4 F-8

Braidwood Generating Station Period of Record: January - March 2011 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 2 2 0 0 0 4 NNE 0 2 1 1 0 0 4 NE 0 0 2 2 0 0 4 ENE 0 2 4 2 0 0 8 E 0 2 2 1 0 0 5 ESE 0 1 1 3 0 0 5 SE 0 0 0 1 0 0 1 SSE 0 0 1 0 0 0 1 S 0 0 0 1 3 0 4 SSW 0 1 1 1 0 1 4 SW 0 0 2 1 0 0 3 WSW 0 0 4 0 1 0 5 W 0 2 1 1 0 1 5 WNW 0 0 1 1 1 0 3 NW 0 3 6 6 1 0 16 NNW 0 1 3 2 0 0 6 Variable 0 0 0 0 0 0 0 Total 0 16 31 23 6 2 78 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 F-9

Braidwood Generating Station Period of Record: January - March 2011 Stability Class - Slightly Unstable - 199Ft-3OFt 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 NNE 7 NE 6 ENE 10 E 2 ESE 3 SE 3 SSE 7 S 2 SSW 6 SW 13 WSW 13 W 11 WNW 1 14 NW 0 6 NNW 0 9 Variable 0 1 Total 0 33 38 25 15 4 115 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 F-10

Braidwood Generating Station Period of Record: January - March 2011 Stability Class - Neutral - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 8 23 40 8 0 80 NNE 1 6 12 16 7 1 43 NE 0 4 35 34 3 1 77 ENE 3 16 55 33 1 0 108 E 0 9 28 16 2 0 55 ESE 2 1 11 12 4 1 31 SE 0 2 14 27 13 2 58 SSE 0 4 24 13 9 0 50 S 0 0 26 34 5 2 67 SSW 0 2 16 28 15 2 63 SW 0 26 27 33 4 1 91 WSW 0 10 25 6 5 1 47 W 4 17 20 13 6 2 62 WNW 1 18 35 36 10 1 101 NW 2 13 33 39 9 0 96 NNW 1 9 21 23 6 2 62 Variable 0 1 0 0 0 0 1 Total 15 146 405 403 107 16 1092 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-11

Braidwood Generating Station Period of Record: January - March 2011 Stability Class - Slightly Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 1 9 1 0 0 12 NNE 3 4 7 3 0 1 18 NE 1 6 24 6 2 10 49 ENE 0 14 33 3 1 0 51 E 0 13 22 4 0 0 39 ESE 1 5 13 11 1 0 31 SE 0 1 8 18 3 0 30 SSE 0 3 10 8 1 0 22 S 0 0 4 10 22 1 37 SSW 0 0 6 26 22 4 58 SW 1 4 16 28 8 2 59 WSW 0 3 18 14 4 0 39 W 1 7 9 13 7 2 39 WNW 1 4 16 35 5 4 65 NW 2 3 37 28 1 0 71 NNW 2 2 25 3 0 0 32 Variable 0 0 0 0 0 0 0 Total 13 70 257 211 77 24 652 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- 12

Braidwood Generating Station Period of Record: January - March 2011 Stability Class - Moderately Stable - 199Ft-3OFt 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 7 0 9 NNE 0 0 0 1 NE 0 0 0 0 0 ENE 0 3 3 0 6 E 1 2 2 0 5 ESE 0 2 2 0 5 SE 0 0 1 0 1 SSE 0 2 0 0 2 S 0 0 0 0 0 SSW 0 0 0 0 0 SW 0 1 0 0 0 1 WSW 1 0 3 2 0 6 W 0 0 5 11 0 16 WNW 0 1 9 10 0 0 20 NW 0 0 12 1 0 0 13 NNW 0 0 3 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 2 13 47 26 0 0 88 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 2011 Stability Class - Extremely Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 2 0 0 0 2

NNE 0 0 0 0 0 0 0

NE 0 0 0 0 0 0 0

ENE 0 0 0 0 0 0 0

E 0 0 0 0 0 0 0

ESE 0 0 0 0 0 0 0

SE 0 0 0 0 0 0 0

SSE 0 0 0 0 0 0 0

S 0 0 0 0 0 0 0

SSW 0 0 0 0 0 0 0

SW 0 0 0 0 0 0 0

wSW 0 1 0 0 0 0 1

W 0 0 0 0 0 0 0

WNW 0 0 0 0 0 0 0

NW 1 0 0 0 0 0 1

NNW 0 0 0 0 0 0 0

Variable 0 0 0 0 0 0 0 Total 1 1 2 0 0 0 4 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 F- 14

Braidwood Generating Station Period of Record: April - June 2011 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 2 1 3 NNE 5 20 NE 7 20 28 ENE 13 1 14 E 13 0 13 ESE 12 3 16 SE 16 3 23 SSE 6 1 8 S 11 4 17 SSW 2 7 19 SW 2 11 21 WSW 4 4 11 W 7 19 37 WNW 13 18 32 NW 8 12 21 NNW 6 4 11 Variable 0 0 0 Total 5 127 119 42 1 0 294 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: 27 F-15

Braidwood Generating Station Period of Record: April - June 2011 Stability Class - Moderately Unstable - 199Ft-3OFt 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 0 4 NNE 1 1 0 6 NE 2 3 0 11 ENE 0 4 0 5 E 0 3 0 3 ESE 0 2 0 2 SE 1 4 0 9 SSE 1 2 0 10 S 0 4 0 7 SSW 0 2 0 10 SW 1 1 0 7 WSW 1 1 0 8 W 1 3 5 1 0 0 10 WNW 1 1 0 0 0 0 2 NW 0 1 0 0 0 0 1 NNW 0 4 2 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 9 38 35 16 3 0 101 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: 27 F-16

Braidwood Generating Station Period of Record: April - June 2011 Stability Class - Slightly Unstable - 199Ft-3OFt 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 NNE 7 NE 8 ENE 8 E 5 ESE 5 SE 5 SSE 6 S 15 SSW 5 SW 11 WSW 6 W 8 WNW 7 NW 5 NNW 3 Variable 0 Total 7 40 35 21 2 0 105 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: 27 F- 17

Braidwood Generating Station Period of Record: April - June 2011 Stability Class - Neutral - 199Ft-3OFt 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 11 4 1 0 0 18 NNE 21 68 21 0 0 113 NE 46 48 10 0 0 109 ENE 51 25 0 0 0 84 E 19 15 0 0 0 39 ESE 26 12 1 0 0 41 SE 23 23 5 0 0 57 SSE 25 17 2 0 0 47 S 18 24 12 2 0 59 SSW 3 23 17 8 1 53 SW 7 46 20 1 0 75 WSW 7 27 0 0 0 34 W 23 33 7 0 0 63 WNW 18 15 11 0 0 49 NW 11 17 0 0 0 30 NNW 12 3 0 0 0 16 Variable 0 0 0 0 0 0 Total 47 321 400 107 11 887 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: 27 F- 18

Braidwood Generating Station Period of Record: April - June 2011 Stability Class - Slightly Stable - 199Ft-3OFt 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 11 3 20 NNE 3 24 6 33 NE 9 12 6 29 ENE 18 24 10 52 E 27 14 5 46 ESE 12 32 10 54 SE 3 39 19 61 SSE 11 28 7 48 S 3 23 33 64 SSW 1 8 16 36 SW 1 15 21 39 WSW 5 24 12 44 W 11 14 5 30 WNW 9 13 7 29 NW 8 4 3 15 NNW 5 4 0 9 Variable 1 0 0 1 Total 133 289 163 16 6 3 610 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: 27 F- 19

Braidwood Generating Station Period of Record: April - June 2011 Stability Class - Moderately Stable - 199Ft-3OFt 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 1 1 0 0 0 3 NNE 3 1 0 0 0 0 4 NE 6 1 0 0 0 0 7 ENE 4 0 2 0 0 0 6 E 12 0 0 0 0 0 12 ESE 8 3 0 0 0 0 11 SE 5 1 0 0 0 0 6 SSE 4 3 0 0 0 0 7 S 1 3 0 0 0 0 4 SSW 3 0 0 0 0 0 3 SW 0 1 0 0 0 0 1 WSW 5 4 0 0 0 0 9 W 12 12 0 0 0 0 24 WNW 1 1 0 0 0 0 2 NW 1 0 0 0 0 0 1 NNW 3 0 0 0 0 0 3 Variable 1 0 0 0 0 0 1 Total 70 31 3 0 0 0 104 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: 27 F-20

Braidwood Generating Station Period of Record: April - June 2011 Stability Class - Extremely Stable - 199Ft-3OFt 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 1 NNE 0 0 0 NE 6 0 9 ENE 11 0 11 E 2 0 2 ESE 4 0 4 SE 3 0 3 SSE 1 0 2 S 1 0 1 SSW 0 0 0 SW 0 0 0 WSW 2 0 2 W 5 0 5 WNW 3 0 3 NW 3 0 3 NNW 1 0 1 Variable 0 0 0 Total 43 0 47 Hours of calm in this stability class: 6 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 27 F-21

Braidwood Generating Station Period of Record: April - June 2011 Stability Class - Extremely Unstable - 199Ft-3OFt 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 1 9 6 1 0 17 NE 1 9 10 0 25 ENE 5 7 6 0 18 E 5 11 0 0 16 ESE 6 5 2 0 15 SE 8 7 4 3 22 SSE 3 3 0 2 8 S 3 7 3 0 15 SSW 4 5 6 2 22 SW 0 3 8 0 16 WSW 0 4 4 0 9 W 0 6 3 7 7 3 26 WNW 1 4 12 23 3 0 43 NW 0 4 9 9 5 0 27 NNW 1 2 3 5 0 0 11 Variable 0 0 0 0 0 0 0 Total 2 53 99 94 36 10 294 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: 27 F-22

Braidwood Generating Station Period of Record: April - June 2011 Stability Class - Moderately Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 1 2 0 0 4 NNE 1 1 2 1 0 0 5 NE 0 1 3 5 2 0 11 ENE 0 2 3 0 0 0 5 E 0 2 0 2 0 0 4 ESE 0 1 1 0 0 0 2 SE 0 2 2 3 0 1 8 SSE 0 2 1 6 0 0 9 S 0 1 4 1 1 1 8 SSW 0 2 1 2 0 3 8 SW 2 1 2 1 3 1 10 WSW 0 0 2 1 0 0 3 W 1 2 0 4 5 0 12 WNW 1 1 2 1 0 0 5 NW 0 0 1 1 0 0 2 NNW 0 3 1 1 0 0 5 Variable 0 0 0 0 0 0 0 Total 5 22 26 31 11 6 101 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: 27 F-23

Braidwood Generating Station Period of Record: April - June 2011 Stability Class - Slightly Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 1 1 0 0 0 3 NNE 0 2 2 0 2 0 6 NE 0 0 5 2 2 0 9 ENE 0 3 2 2 0 0 7 E 0 1 3 1 0 0 5 ESE 0 3 0 0 2 0 5 SE 0 2 2 0 1 0 5 SSE 0 3 1 3 0 0 7 S 0 3 1 6 1 0 11 SSW 0 1 1 4 2 1 9 SW 0 0 1 1 6 2 10 WSW 0 0 1 2 0 0 3 W 0 1 0 5 3 0 9 WNW 0 2 3 2 2 0 9 NW 0 0 4 3 0 0 7 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 1 22 27 31 21 3 105 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: 27 F-24

Braidwood Generating Station Period of Record: April - June 2011 Stability Class - Neutral - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 4 3 1 0 12 NNE 0 8 19 45 25 5 102 NE 0 10 45 31 17 0 103 ENE 0 14 41 33 2 0 90 E 0 11 12 19 10 4 56 ESE 2 6 7 16 7 2 40 SE 1 4 10 20 13 3 51 SSE 1 5 16 18 3 1 44 S 0 7 15 22 8 4 56 SSW 1 1 6 20 16 12 56 SW 0 4 16 28 14 4 66 WSW 0 2 10 27 5 0 44 W 0 4 8 23 7 0 42 WNW 0 3 21 23 13 8 68 NW 0 5 10 20 4 0 39 NNW 1 5 10 2 0 0 18 Variable 0 0 0 0 0 0 0 Total 6 93 250 350 145 43 887 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: 27 F-25

Braidwood Generating Station Period of Record: April - June 2011 Stability Class - Slightly Stable - 199Ft-3OFt 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 6 5 0 0 16 NNE 0 4 13 16 0 0 33 NE 0 5 12 8 2 0 27 ENE 1 4 21 4 1 0 31 E 1 10 39 9 2 1 62 ESE 1 6 11 20 6 1 45 SE 0 8 16 37 7 0 68 SSE 0 4 14 13 6 0 37 S 0 3 25 18 17 1 64 SSW 0 4 9 24 1 12 50 SW 1 1 16 22 0 2 42 WSW 0 2 17 8 1 1 29 W 0 2 20 12 2 1 37 WNW 0 6 11 15 2 0 34 NW 0 5 10 7 0 0 22 NNW 0 4 8 1 0 0 13 Variable 0 0 0 0 0 0 0 Total 4 73 248 219 47 19 610 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: 27 F-26

Braidwood Generating Station Period of Record: April - June 2011 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 7 NNE 0 0 3 NE 0 0 6 ENE 1 0 3 E 0 0 11 ESE 0 0 6 SE 0 0 6 SSE 0 0 8 S 0 0 11 SSW 0 0 1 SW 0 0 4 WSW 0 0 4 W 0 0 8 WNW 0 1 10 8 0 0 19 NW 0 2 2 2 0 0 6 NNW 1 2 0 0 0 0 3 Variable 0 1 0 0 0 0 1 Total 2 29 55 21 0 0 107 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: 27 F-27

Braidwood Generating Station Period of Record: April - June 2011 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

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 6 21 22 3 0 0 52 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: 27 F-28

Braidwood Generating Station Period of Record: July - September 2011 Stability Class - Extremely Unstable - 199Ft-3OFt 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 7 3 2 0 0 13 NNE 0 8 16 5 0 0 29 NE 0 16 10 0 0 0 26 ENE 4 13 1 0 0 0 18 E 2 4 0 0 0 0 6 ESE 1 20 0 0 0 0 21 SE 0 17 0 0 0 0 17 SSE 0 27 2 0 0 0 29 S 0 15 14 0 0 0 29 SSW 0 13 16 7 0 0 36 SW 1 11 12 1 0 0 25 WSW 0 13 27 3 0 0 43 W 0 19 13 0 0 0 32 WNW 1 20 4 0 0 0 25 NW 1 22 2 0 0 0 25 NNW 0 25 13 2 0 0 40 Variable 0 0 0 0 0 0 0 Total 11 250 133 20 0 0 414 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 cl.asses: 4 F-29

Braidwood Generating Station Period of Record: July - September 2011 Stability Class - Moderately Unstable - 199Ft-3OFt 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 7 10 1 0 0 18 NNE 0 3 4 .1 0 0 8 NE 1 4 2 0 0 0 7 ENE 5 6 0 0 0 0 11 E 4 1 0 0 0 0 5 ESE 0 2 0 0 0 0 2 SE 2 6 0 0 0 0 8 SSE 1 9 2 0 0 0 12 S 1 3 1 0 0 0 5 SSW 0 2 2 2 0 0 6 SW 0 3 7 0 0 0 10 WSW 0 2 6 0 0 0 8 W 1 10 1 0 0 0 12 WNW 4 5 0 0 0 0 9 NW 1 5 0 0 0 0 6 NNW 0 6 3 2 0 0 11 Variable 0 0 0 0 0 0 0 Total 20 74 38 6 0 0 138 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-30

Braidwood Generating Station Period of Record: July - September 2011 Stability Class - Slightly Unstable - 199Ft-3OFt 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 7 5 0 0 0 13 NNE 0 6 3 0 0 0 9 NE 2 4 0 0 0 0 6 ENE 4 2 0 0 0 0 6 E 2 1 0 0 0 0 3 ESE 1 1 0 0 0 0 2 SE 2 1 1 0 0 0 4 SSE 0 4 1 0 0 0 5 S 0 3 2 0 0 0 5 SSW 0 2 1 0 0 0 3 SW 1 2 6 2 0 0 11 WSW 0 3 2 0 0 0 5 W 3 6 2 0 0 0 11 WNW 1 7 1 0 0 0 9 NW 2 5 1 0 0 0 8 NNW 0 12 3 0 1 0 16 Variable 1 0 0 0 0 0 1 Total 20 66 28 2 1 0 117 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 0 Hours of missing stability measurements in all sta bility cl asses: 4 F-31

Braidwood Generating Station Period of Record: July - September 2011 Stability Class - Neutral - 199Ft-3OFt 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 18 9 0 0 31 NNE 7 43 15 0 0 68 NE 14 20 0 0 0 34 ENE 16 15 0 0 0 31 E 7 4 0 0 0 11 ESE 5 14 1 0 0 20 SE 1 18 5 0 0 24 SSE 4 19 10 0 0 34 S 2 12 19 0 0 34 SSW 2 5 25 0 0 36 SW 1 13 22 0 0 38 WSW 0 13 7 0 0 21 W 8 15 2 0 0 25 WNW 11 14 3 0 0 28 NW 3 12 2 0 0 22 NNW 3 40 8 0 0 59 Variable 2 0 0 0 0 2 Total 88 275 128 27 0 0 518 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-32

Braidwood Generating Station Period of Record: July - September 2011 Stability Class - Slightly Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 20 26 3 0 0 0 49 NNE 15 22 3 0 0 0 40 NE 27 10 0 0 0 0 37 ENE 51 4 0 0 0 0 55 E 31 4 0 0 0 0 35 ESE 14 29 0 0 0 0 43 SE 13 20 0 0 0 0 33 SSE 8 31 0 0 0 0 39 S 5 40 7 0 0 0 52 SSW 3 14 27 0 0 0 44 SW 1 11 26 0 0 0 38 WSW 6 14 0 0 0 0 20 W 19 11 2 0 0 0 32 WNW 18 2 1 0 0 0 21 NW 17 4 4 0 0 0 25 NNW 13 24 0 0 0 0 37 Variable 0 0 0 0 0 0 0 Total 261 266 73 0 0 0 600 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 4 F-33

Braidwood Generating Station Period of Record: July - September 2011 Stability Class - Moderately Stable - 199Ft-3OFt 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 18 6 0 0 0 24 NNE 11 0 0 0 0 11 NE 12 0 0 0 0 12 ENE 12 0 0 0 0 12 E 27 0 0 0 0 27 ESE 16 4. 0 0 0 20 SE 7 1 0 0 0 8 SSE 7 6 0 0 0 13 S 4 0 0 0 0 4 SSW 7 2 0 0 0 9 SW 3 2 0 0 0 5 WSW 12 7 0 0 0 19 W 26 2 0 0 0 28 WNW 15 0 0 0 0 15 NW 17 0 0 0 0 17 NNW 18 0 0 0 0 18 Variable 0 0 0 0 0 0 Total 212 30 0 0 0 242 Hours of calm in this stability class: 16 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 F-34

Braidwood Generating Station Period of Record: July - September 2011 Stability Class - Extremely Stable - 199Ft-3OFt 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 7 0 0 0 0 0 7 NNE 6 0 0 0 0 0 6 NE 2 0 0 0 0 0 2 ENE 11 0 0 0 0 0 11 E 9 0 0 0 0 0 9 ESE 7 0 0 0 0 0 7 SE 3 0 0 0 0 0 3 SSE 1 0 0 0 0 0 1 S 2 0 0 0 0 0 2 SSW 1 0 0 0 0 0 1 SW 7 0 0 0 0 0 7 WSW 8 2 0 0 0 0 10 W 20 4 0 0 0 0 24 WNW 6 0 0 0 0 0 6 NW 6 0 0 0 0 0 6 NNW 3 0 0 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 99 6 0 0 0 0 105 Hours of calm in this stability class: 51 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 F-35

Braidwood Generating Station Period of Record: July - September 2011 Stability Class - Extremely Unstable - 199Ft-3OFt 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 5 2 0 0 11 NNE 0 4 7 9 6 0 26 NE 1 8 12 7 0 0 28 ENE 1 14 2 2 0 0 19 E 0 5 0 0 0 0 5 ESE 1 10 10 0 0 0 21 SE 0 14 5 0 0 0 19 SSE 0 14 7 1 0 0 22 S 0 11 13 2 2 0 28 SSW 0 8 21 8 7 0 44 SW 1 5 13 3 0 0 22 WSW 0 4 13 11 0 0 28 W 0 5 25 12 1 0 43 WNW 0 16 11 1 4 0 32 NW 0 10 10 1 0 0 21 NNW 0 18 22 2 3 0 45 Variable 0 0 0 0 0 0 0 Total 4 150 176 61 23 0 414 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-36

Braidwood Generating Station Period of Record: July - September 2011 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 16 NNE 9 NE 7 ENE 10 E 5 ESE 2 SE 6 SSE 14 S 3 SSW 7 SW 11 WSW 8 W 11 WNW 11 NW 6 NNW 12 Variable 0 Total 7 54 48 24 5 0 138 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-37

Braidwood Generating Station Period of Record: July - September 2011 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 3 6 2 0 0 11 NNE 1 3 3 3 0 0 10 NE 1 2 0 1 0 0 4 ENE 2 4 1 0 0 0 7 E 0 4 0 0 0 0 4 ESE 0 1 1 0 0 0 2 SE 0 0 0 0 1 0 1 SSE 1 3 1 0 1 0 6 S 0 2 2 0 1 0 5 SSW 0 0 0 2 0 0 2 SW 0 2 4 1 2 0 9 WSW 0 2 5 2 0 0 9 W 1 2 0 3 0 0 6 WNW 1 7 3 1 0 0 12 NW 2 4 5 1 0 0 12 NNW 0 6 8 1 1 0 16 Variable 1 0 0 0 0 0 1 Total 10 45 39 17 6 0 117 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-38

Braidwood Generating Station Period of Record: July - September 2011 Stability Class - Neutral - 199Ft-3OFt 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 6 8 8 26 NNE 15 12 14 46 NE 16 27 3 49 ENE 20 11 1 34 E 8 3 0 15 ESE 2 7 7 19 SE 3 7 9 22 SSE 8 11 11 32 S 4 10 10 32 SSW 3 5 19 33 SW 4 17 17 40 WSW 2 19 6 27 W 7 6 5 23 WNW 8 11 5 29 NW 6 13 2 31 NNW 8 35 8 59 Variable 0 0 0 1 Total 30 120 202 125 33 8 518 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-39

Braidwood Generating Station Period of Record: July - September 2011 Stability Class - Slightly Stable - 199Ft-3OFt 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 4 27 10 43 NNE 6 18 8 33 NE 10 26 2 39 ENE 30 25 0 56 E 19 27 0 49 ESE 4 17 16 38 SE 12 14 8 34 SSE 6 14 7 27 S 4 32 11 48 SSW 3 21 28 56 SW 4 17 27 50 WSW 4 13 1 18 W 4 11 2 19 WNW 8 16 2 27 NW 6 17 3 30 NNW 10 21 4 35 Variable 0 0 0 0 Total 13 134 316 129 9 1 602 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 cliasses: 4 F-40

Braidwood Generating Station Period of Record: July - September 2011 Stability Class - Moderately Stable - 199Ft-3OFt 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 2 24 3 0 0 32 NNE 1 7 9 0 0 0 17 NE 0 3 5 0 0 0 8 ENE 2 9 2 0 0 0 13 E 1 6 11 1 0 0 19 ESE 3 5 2 2 0 0 12 SE 0 7 10 2 0 0 19 SSE 2 4 6 0 0 0 12 S 1 8 5 1 0 0 15 SSW 1 11 5 0 0 0 17 SW 1 8 2 0 0 0 11 WSW 1 7 5 0 0 0 13 W 1 5 10 2 0 0 18 WNW 0 4 13 1 0 0 18 NW 0 9 12 1 0 0 22 NNW 0 6 6 0 0 0 12 Variable 0 0 0 0 0 0 0 Total 17 101 127 13 0 0 258 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-41

Braidwood Generating Station Period of Record: July - September 2011 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 8 6 0 0 0 15 NNE 0 1 5 0 0 0 6 NE 0 1 1 0 0 0 2 ENE 1 4 0 0 0 0 5 E 0 3 0 1 0 0 4 ESE 1 3 7 3 0 0 14 SE 0 4 2 0 0 0 6 SSE 1 8 1 0 0 0 10 S 2 5 0 0 0 0 7 SSW 2 7 0 0 0 0 9 SW 5 12 1 0 0 0 18 WSW 4 9 9 1 0 0 23 W 3 9 8 0 0 0 20 WNW 2 3 0 0 0 0 5 NW 1 3 4 0 0 0 8 NNW 2 1 1 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 25 81 45 5 0 0 156 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-42

Braidwood Generating Station Period of Record: October - December 2011 Stability Class - Extremely Unstable - 199Ft-3OFt 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 3 NNE 1 1 NE 0 0 ENE 0 2 E 0 0 ESE 0 0 SE 2 3 SSE 0 8 S 10 14 SSW 3 4 SW 2 2 WSW 0 1 W 2 13 WNW 5 12 NW 5 12 NNW 0 2 Variable 0 0 Total 0 33 33 11 0 0 77 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-43

Braidwood Generating Station Period of Record: October December 2011 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 3 NNE 0 0 1 NE 0 0 0 ENE 0 0 1 E 0 0 0 ESE 0 0 1 SE 1 0 8 SSE 1 0 4 S 0 0 9 SSW 0 1 8 SW 0 0 4 WSW 0 0 7 W 0 0 12 WNW 1 0 9 NW 0 0 7 NNW 0 0 4 Variable 0 0 0 Total 3 33 34 1 78 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-44

Braidwood Generating Station Period of Record: October - December 2011 Stability Class - Slightly Unstable - 199Ft-3OFt 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 NNE 2 NE 2 ENE 0 E 1 ESE 0 SE 1 SSE 7 S 14 SSW 20 SW 8 WSW 8 W 13 WNW 6 NW 3 NNW 7 Variable 0 Total 6 36 35 16 2 0 95 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 0 Hours of missing stability measurements in all sta bility cl asses: 3 F-45

Braidwood Generating Station Period of Record: October - December 2011 Stability Class - Neutral - 199Ft-3OFt 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 26 42 15 4 0 89 NNE 3 17 36 6 1 0 63 NE 5 22 17 4 0 0 48 ENE 2 33 0 0 0 0 35 E 4 5 0 0 0 0 9 ESE 3 2 1 0 0 0 6 SE 1 .10 7 2 0 0 20 SSE 2 30 39 1 0 0 72 S 0 11 42 68 0 132 SSW 0 12 27 46 14 2 101 SW 0 12 38 9 2 2 63 WSW 3 30 19 0 0 0 52 W 6 21 28 15 0 0 70 WNW 9 31 13 5 0 0 58 NW 7 28 37 0 0 0 72 NNW 3 33 34 17 0 0 87 Variable 0 0 0 0 0 0 0 Total 50 323 380 188 32 4 977 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: 3 F-46

Braidwood Generating Station Period of Record: October - December 2011 Stabilit y Class - Slightly Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Directio n 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 8 1 0 0 0 14 NNE 1 7 3 0 0 0 11 NE 6 10 0 1 0 0 17 ENE 12 10 0 0 0 0 22 E 7 3 0 0 0 0 10 ESE 1 6 0 0 0 0 7 SE 2 23 13 0 0 0 38 SSE 4 57 25 3 0 0 89 S 1 42 59 26 0 0 128 SSW 3 29 37 8 2 0 79 SW 4 29 9 1 0 0 43 WSW 10 53 8 0 0 0 71 W 19 39 22 0 0 0 80 WNW 17 15 2 0 0 0 34 NW 5 16 8 0 0 0 29 NNW 2 14 1 0 0 0 17 Variable 0 0 0 0 0 0 0 Total 99 361 188 39 2 689 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stabili ty class: 3 Hours of missing stability measurements in all sta bility cl asses: 3 F-47

Braidwood Generating Station Period of Record: October - December 2011 Stability Class - Moderately Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 0 0 0 0 1 NNE 1 1 0 0 0 0 2 NE 2 0 0 0 0 0 2 ENE 5 0 0 0 0 0 5 E 9 0 0 0 0 0 9 ESE 5 6 0 0 0 0 11 SE 8 12 0 0 0 0 20 SSE 4 7 0 0 0 0 11 S 4 0 0 0 0 0 4 SSW 4 5 4 0 0 0 13 SW 3 2 2 0 0 0 7 WSW 9 35 0 0 0 0 44 W 16 8 0 0 0 0 24 WNW 11 0 0 0 0 0 11 NW 4 0 0 0 0 0 4 NNW 4 1 0 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 89 78 6 0 0 0 173 Hours of calm in this stability class: 4 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-48

Braidwood Generating Station Period of Record: October - December 2011 Stability Class - Extremely Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 1 0 0 0 0 0 1 ENE 1 0 0 0 0 0 1 E 11 0 0 0 0 0 11 ESE 6 2 0 0 0 0 8 SE 13 0 0 0 0 0 13 SSE 2 0 0 0 0 0 2 S 4 1 0 0 0 0 5 SSW 4 4 0 0 0 0 8 SW 3 0 0 0 0 0 3 WSW 3 0 0 0 0 0 3 W 12 0 0 0 0 0 12 WNW 9 0 0 0 0 0 9 NW 4 0 0 0 0 0 4 NNW 1 0 0 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 74 7 0 0 0 0 81 Hours of calm in this stability class: 17 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-49

Braidwood Generating Station Period of Record: October - December 2011 Stability Class - Extremely Unstable - 199Ft-3OFt 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 0 0 3 NNE 0 1 0 0 1 NE 0 0 0 0 0 ENE 0 0 0 0 0 E 0 0 0 0 2 ESE 0 0 0 0 0 SE 0 2 0 0 2 SSE 0 0 0 0 9 S 0 7 0 0 13 SSW 0 3 0 0 5 SW 0 2 0 0 2 WSW 0 0 0 0 0 W 0 0 2 3 WNW 0 4 5 3 10 2 24 NW 0 1 8 3 0 0 12 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 9 30 23 12 3 77 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-50

Braidwood Generating Station Period of Record: October - December 2011 Stability Class - Moderately Unstable - 199Ft-3OFt 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 NNE 0 0 1 NE 0 0 0 ENE 0 0 1 E 0 0 0 ESE 0 0 0 SE 0 0 7 SSE 0 0 4 S 0 0 7 SSW 0 2 12 SW 1 0 3 WSW 0 0 5 W 0 2 4 3 2 1 12 WNW 0 1 5 2 1 0 9 NW 0 4 2 1 1 0 8 NNW 0 1 4 1 1 0 7 Variable 0 0 0 0 0 0 0 Total 1 15 29 23 7 3 78 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-51

Braidwood Generating Station Period of Record: October - December 2011 Stability Class - Slightly Unstable - 199Ft-3OFt 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 3 0 0 0 3 NNE 0 0 1 1 0 0 2 NE 0 0 0 0 0 0 0 ENE 0 0 1 1 0 0 2 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 1 2 3 1 0 0 7 S 2 1 3 5 0 0 11 SSW 0 4 4 3 7 4 22 SW 0 2 1 5 1 0 9 WSW 0 3 4 1 0 0 8 W 0 6 1 2 2 0 11 WNW 0 1 0 2 0 7 NW 0 3 3 0 0 0 6 NNW 0 0 4 3 0 0 7 Variable 0 0 0 0 0 0 0 Total 3 22 28 24 14 4 95 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-52

Braidwood Generating Station Period of Record: October - December 2011 Stability Class - Neutral - 199Ft-3OFt 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 11 35 29 11 3 89 NNE 0 1 23 17 10 8 59 NE 3 4 15 23 9 1 55 ENE 0 7 24 4 1 0 36 E 0 6 14 0 0 0 20 ESE 2 1 2 1 0 0 6 SE 3 2 5 5 1 1 17 SSE 1 6 13 16 10 0 46 S 0 2 26 32 40 24 124 SSW 0 1 9 30 55 32 127 SW 0 4 27 24 13 10 78 WSW 0 12 19 13 1 1 46 W 2 14 11 20 6 2 55 WNW 0 11 13 19 13 9 65 NW 4 16 21 23 13 0 77 NNW 0 8 30 32 13 3 86 Variable 0 0 0 0 0 0 0 Total 15 106 287 288 196 94 986 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-53

Braidwood Generating Station Period of Record: October - December 2011 Stability Class - Slightly Stable - 199Ft-3OFt 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 8 2 0 0 14 NNE 0 3 1 5 1 0 10 NE 1 2 7 2 0 1 13 ENE 1 8 15 0 0 0 24 E 0 1 10 0 0 0 11 ESE 0 0 4 4 0 0 8 SE 0 2 5 14 0 0 21 SSE 0 1 20 30 9 1 61 S 0 1 31 42 39 3 116 SSW 2 3 25 39 35 4 108 SW 0 6 27 22 4 0 59 WSW 1 7 22 18 0 0 48 W 1 9 33 39 7 0 89 WNW 1 8 12 25 1 0 47 NW 0 6 15 11 0 0 32 NNW 0 6 15 11 1 0 33 Variable 0 0 0 0 0 0 0 Total 7 67 250 264 97 9 694 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-54

Braidwood Generating Station Period of Record: October - December 2011 Stability Class - Moderately Stable - 199Ft-3OFt 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 1 0 0 2 NE 0 2 0 2 0 0 4 ENE 0 1 3 0 0 0 4 E 0 2 1 0 0 0 3 ESE 0 0 3 2 0 0 5 SE 0 0 9 3 0 0 12 SSE 2 0 8 5 0 0 15 S 0 4 7 1 0 0 12 SSW 0 1 4 0 0 0 5 SW 0 5 3 6 2 0 16 WSW 0 0 2 4 0 0 6 W 0 6 16 25 0 0 47 WNW 1 2 15 1 0 0 19 NW 0 5 12 2 0 0 19 NNW 0 0 6 1 0 0 7 Variable 0 0 0 0 0 0 0 Total 3 28 91 53 2 0 177 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-55

Braidwood Generating Station Period of Record: October - December 2011 Stability Class - Extremely Stable - 199Ft-3OFt 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 0 0 0 3 NNE 0 1 0 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 1 1 1 0 0 0 3 E 1 2 0 0 0 0 3 1 2 1 1 0 0 5 SE 0 1 4 1 0 0 6 SSE 1 2 5 2 0 0 10 S 0 2 8 0 0 0 10 SSW 0 1 4 0 0 0 5 SW 0 2 10 0 0 0 12 WSW 1 2 0 0 0 4 1

W 1 3 0 0 0 0 4 1 2 3 0 0 0 6 WNW NW 1 1 5 5 0 0 12 NNW 1 3 5 1 0 0 10 Variable 0 0 0 0 0 0 0 Total 9 25 50 10 0 0 94 Hours of calm in this stability class: 4 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-56

APPENDIX G 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 2011 Prepared By Teledyne Brown Engineering Environmental Services Exel ~n.

Nuclear Braidwood Station Braceville, IL 60407 May 2012

Intentionally left blank Table Of Contents I. Sum m ary and Conclusions .......................................................................................... 1 I1. Introduction ............................................................................................................. 3 A. O bjectives of the RG PP .................................................................................. 3 B. Im plem entation of the Objectives .................................................................. 3 C. Program Description ...................................................................................... 4 D. Characteristics of Tritium (H-3) ...................................................................... 4 Ill. Program Description ................................................................................................ 5 A . Sam ple Analysis ............................................................................................ 5 B. Data Interpretation .......................................................................................... 6 C. Background Analysis ..................................................................................... 6

1. Background Concentrations of Tritium ................................................. 7 IV. Results and Discussion ............................................................................................ 9 A. Missed Sam ples .............................................................................................. 9 B. G roundwater Results ..................................................................................... 9 C. Surface W ater Results .................................................................................. 11 D. Drinking W ater W ell 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

Appendices Appendix A Location Designation Tables Table A-1 Radiological Groundwater Protection Program - Sampling Locations, Braidwood Station, 2011 Figqures Figure A-1 Sampling Locations near the Site Boundary of the Braidwood Station, 2011 Figure A-2 Intermediate Sampling Locations of the Braidwood Station, 2011 Figure A-3 Distant Sampling Locations of the Braidwood Station, 2011 Appendix B Data Tables Tables Table B-1.1 Concentrations of Tritium, Strontium, Gross Alpha and Gross Beta in Groundwater Samples Collected in the Vicinity of Braidwood Station, 2011.

Table B-1.2 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of Braidwood Station, 2011.

Table B-1.3 Concentrations of Hard-To-Detects in Groundwater Samples Collected in the Vicinity of Braidwood Station, 2011.

Table B-1I.1 Concentrations of Tritium and Strontium in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2011.

Table B-11.2 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Braidwood Station, 2011.

ii

I. Summary and Conclusions In 2011, 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 2011. During that time period, 839 analyses were performed on 538 samples from 168 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 it's laboratories achieve a lower limit of detection 10 times less than Braidwood's ODCM and 100 times less than federal regulation.

Strontium-89/90 was not detected at a concentration greater than the LLD of 1.0 picoCuries per liter (pCi/L) in any of the groundwater or surface water 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 159 of 538 analyses. The tritium concentrations ranged from 159 +/- 99 pCi/L to 3,800 +/- 429 pCi/L. The tritium that was detected in the groundwater 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 samples throughout the sampling year in 2011.

Gross Alpha (dissolved) was detected in four groundwater samples. The concentrations ranged from 0.9 to 8.3 pCi/L. Gross Alpha (suspended) was detected in 6 groundwater samples. The concentrations ranged from 0.9 to 1.9 pCi/L. Gross Beta (dissolved) was detected in 36 groundwater samples. The concentrations ranged from 1.5 to 100 pCi/L. Gross Beta (suspended) was detected in three groundwater samples. The concentrations ranged from 2.5 to 7.6 pCi/L.

Hard-To-Detect analyses were performed on three groundwater samples to establish background levels. The analyses included Fe-55, Ni-63, Am-241, Cm-242, Cm-243/244, Pu-238, Pu-239/240, U-234, U-235 and U-238. All hard-to-detect nuclides were not detected at concentrations greater than their respective MDCs. The isotopes of U-234 and U-238 were detected in one sample affecting 1 of 1 groundwater monitoring locations analyzed. The U-234 concentration was 0.29 pCi/L and the U-238 concentration was 0.19 pCi/L. The levels detected are due to naturally occurring radioactive material in the environment.

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 3587 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 2011.

A. Objective of the 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. It's 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 water.

Ill. 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 2011.

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.

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, 1-131, Cs-134, Cs-137, Ba-140 and La-1 40 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.

At the upstream Kankakee River collection point, BD-25, monthly composites of weekly sample collections from all surface water locations indicated tritium concentrations were not detectable above the LLD

(<200 pCi/L). Monthly composites of weekly sample collections from all surface water locations indicate strontium-89, strontium-90, cesium-1 34 and cesium-1 37 concentrations were less than their specified LLDs.

Groundwater was collected from one off-site well on a quarterly basis.

Gamma isotopic, radiostrontium, and tritium analyses were performed on all samples. Strontium-89, strontium-90, tritium, and gamma emitters were below their respective LLDs.

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 USEPA's RadNet database. GNIP provides tritium precipitation concentration data for samples collected world wide from 1960 to 2011.

RadNet provides tritium precipitation concentration data for samples collected at stations through out the U.S. from 1960 up to an,d including 2011. 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 surfaceý 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 decadeIs 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 Radiological Groundwater Protection Program (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.

According to the Station RGPP, MW-6, MW-BW-143D, MW-BW-162D, MW-BW-201 S, and MW-BW-2071 were designated as detection wells. The station RGPP requires the wells designated as detection wells to be sampled and analyzed for tritium on a quarterly basis. The aforementioned wells were not sampled during one or more of the quarters in 2011. Reasons for lack of sampling include well condition deficiencies, low well production, and frozen water preventing sampling.

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. MW-BW-162D did not have these analyses performed during 2011. The sample is pulled on an annual periodicity and the sample was not able to be obtained for the requisite analyses.

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 detection limit to 3,800 pCi/I. Some contamination still exists and monitoring is ongoing (Table B-1.1, Appendix B).

Strontium Strontium-90 was analyzed for in 47 samples and was less than the required detection limit of 1.0 pCi/liter (Table B-1.1, 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 samples throughout the sampling year in 2011. Gross Alpha (dissolved) was detected in four groundwater samples. The concentrations ranged from 0.9 to 8.3 pCi/L. Gross Alpha (suspended) was detected in 6 groundwater samples. The concentrations ranged from 0.9 to 1.9 pCi/L. Gross Beta (dissolved) was detected in 36 groundwater samples. The concentrations ranged from 1.5 to 100 pCi/L. Gross Beta (suspended) was detected in three groundwater samples. The concentrations ranged from 2.5 to 7.6 pCi/L (Table B-1.1, Appendix B).

Hard-To-Detect Hard-To-Detect analyses were performed on three groundwater samples to establish background levels. The analyses included Fe-55, Ni-63, Am-241, Cm-242, Cm-243/244, Pu-238, Pu-239/240, U-234, U-235 and U-238. None of hard4o-detect nuclides were detected at concentrations greater than their respective MDCs with the exception of U-234 and U-238 affecting one groundwater monitoring location analyzed. The U-234 concentration was 0.29 pCi/L and the U-238 concentration was 0.19 pCi/L. The levels detected are considered background (Table B-1.3, Appendix B).

Gamma Emitters Naturally occuring K-40 was detected in 4 samples. The concentrations ranged from 50 to 86 pCi/L. No other gamma emitting nuclides were detected in any of the samples analyzed.

(Table B-1.2, Appendix B)

C. Surface Water Results Surface Water Samples were collected from thirteen 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-11.1, Appendix B). Tritium values ranged from the minimum detection limit to 428 pCi/I.

Strontium Strontium-90 was analyzed in one sample and was less than the required detection limit of 1.0 pCi/liter (Table B-I.1, Appendix B).

Gamma Emitters Naturally occurring K-40 was detected in 2 samples. The concentrations ranged from 47 to 53 pCi/L. No other gamma emitting nuclides were detected in any of the samples analyzed.

(Table B-11.2, Appendix B)

D. Drinking Water Well Survey Drinking water wells near Braidwood Station were sampled weekly, monthly or quarterly in 2011.

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 Previously identified contaminated groundwater plumes are being addressed by the Braidwood Station tritium remediation activities.

There were no liquid leaks, spills, or releases in 2011 that affected groundwater.

G. Trends and Analyses Monitoring of remediation activities indicate that tritium concentrations in affected areas are trending down.

H. Investigations Investigation of historic spills and the groundwater contamination has resulted in groundwater remediation activities at Braidwood Station.

I. Actions Taken

1. Compensatory Actions All Circulating Water Blowdown valve vaults were coated to prevent any leakage of water from the vaults to the groundwater. A remote leakage detection system has been installed which provides continuous monitoring of the vaults. Operations procedures are in place for actions to take in the event the leak detection system alarms.

Walkdowns of the Circulating Water Blowdown pipeline and vaults were performed weekly.

2. Installation of Monitoring Wells Exelon has installed a permanent monitoring well network that ensures that ground water will be appropriately monitored around the plant and at the various remediation sites. Monitoring well locations were based on contamination source, ground flow direction, and source concentration. Some monitoring points are not primarily used for sampling but rather to measure ground water elevation. Water elevation is used extensively around active remediation sites to verify that ground water is still flowing toward remediation wells.

3. Actions to Recover/Reverse Plumes Vacuum Breaker 1 area: Three remediation wells have been installed in this area to remove contaminated ground water. Monitoring of this activity indicates the remediation is proceeding acceptably.

Vacuum Breaker 2 area: Two remediation wells have been installed in this area to remove contaminated ground water. These wells, which became operational in 2008, discharge to the Exelon Pond. The wells are in place to remediate a previously identified contamination plume and were not installed to remediate contamination from a new spill.

Vacuum Breakers 4, 6, & 7: Monitoring wells have been installed within and down gradient of these plumes which originated from vacuum breaker valves along the blowdown line. These sites are being remediated by monitored natural attenuation.

Exelon Pond area: The combination of groundwater sample monitoring and water level monitoring ensures that the active remedial pumping of Exelon Pond continues to capture the tritium that spilled from vacuum breakers 2 and 3 almost ten years ago. Monitoring to date has shown marked reduction in the most contaminated area and the station continues to monitor plume capture to determine whether adjustments are needed in the pumping rate.

Intentionally left blank APPENDIX A LOCATION DESIGNATION

Intentionally left blank TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Braidwood Station, 2011 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-1I 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-19R Monitoring Well BL-20D 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 C-ID Monitoring Well C-2D Monitoring Well CD-1D Monitoring Well D-1D Monitoring Well D-2D Monitoring Well D-3D Monitoring Well DITCH (DS-2) Surface Water EXELON POND Surface Water F-1 D Monitoring Well F-3D Monitoring Well F-4D Monitoring Well F-5D Monitoring Well F-6D Monitoring Well F-7D Monitoring Well F-8D Monitoring Well F-9D Monitoring Well FATLAN POND Surface Water G-2 Monitoring Well G-2D Monitoring Well G-3 Monitoring Well G-4S Monitoring Well G-5S Monitoring Well G-6S Monitoring Well H-DITCH Surface Water MW-102R Monitoring Well MW-103 Monitoring Well MW-105 Monitoring Well MW-105D Monitoring Well A-1

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Braidwood Station, 2011 Station Code Sample Description MW-106D Monitoring Well MW-109D Monitoring Well MW-11 Monitoring Well MW-1 10 Monitoring Well MW-111 DR Monitoring Well MW-112D Monitoring Well MW-113 Monitoring Well MW-113DR Monitoring Well MW-13 Monitoring Well MW-1 30D Monitoring Well MW-131D Monitoring Well MW-132D Monitoring Well 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-148D Monitoring Well MW-149D Monitoring Well MW-150 Monitoring Well MW- 150D Monitoring Well MW-151D Monitoring Well MW-154 Monitoring Well MW-155 Monitoring Well MW-156 Monitoring Well MW-157D 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-2011 Monitoring Well A-2

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Braidwood Station, 2011 Station Code Sample Description MW-BW-201S Monitoring Well MW-BW-2021 Monitoring Well MW-BW-202S Monitoring Well MW-BW-2031 Monitoring Well MW-BW-203S Monitoring Well MW-BW-2041 Monitoring Well MW-BW-2051 Monitoring Well MW-BW-2061 Monitoring Well MW-BW-2071 Monitoring Well MW-BW-208BD Monitoring Well P-2D Monitoring Well P-4D Monitoring Well P-5D Monitoring Well P-13D Monitoring Well P-14D Monitoring Well PW-001 Monitoring Well PW-002 Monitoring Well PW-003 Monitoring Well PW-004 Monitoring Well PW-005 Monitoring Well PW-006 Monitoring Well PW-007 Monitoring Well PW-008 Monitoring Well PW-009 Monitoring Well PW-006A Monitoring Well PW-006B Monitoring Well PW-006P Surface Water PW-01 1 Monitoring Well PW-013 Monitoring Well PW-014 Monitoring Well PW-015 Monitoring Well PW-016 Monitoring Well PW-018 Monitoring Well PW-485 Monitoring Well PW-ALLISON Monitoring Well PWG-060 Monitoring Well PWG-060-POND Surface Water PWN-1 15 Monitoring Well PW-604 Monitoring Well RW-10 Monitoring Well RW-5 Monitoring Well RW-6 Monitoring Well RW-7 Monitoring Well RW-9 Monitoring Well S-1D Monitoring Well S-2D Monitoring Well S-4D Monitoring Well S-7D Monitoring Well S-8DR Monitoring Well A-3

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Braidwood Station, 2011 Station Code Sample Description SC-ID Monitoring Well SC-2D Monitoring Well SG-BW-1 03 Surface Water SG-BW-105 Surface Water SG-BW-106 Surface Water STARK POND Surface Water STARK SPIGOT Monitoring Well SW-05 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-21 D 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 VB1O-1 Monitoring Well VBI-1 Monitoring Well VB1-1D Monitoring Well VB1-10D Monitoring Well VB11-1 Monitoring Well VB1-11D Monitoring Well VB1-12D Monitoring Well VB1-2D Monitoring Well VB1-3D Monitoring Well VB1-4D Monitoring Well VB1-5D Monitoring Well VB1-6D Monitoring Well VB1-7D Monitoring Well VB1-8D 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 A-4

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Braidwood Station, 2011 Station Code Sample Description 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 VB2-9 Monitoring Well VB2-9D Monitoring Well VB2-10D 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 WCFPD-1D Monitoring Well WCFPD-2DR Monitoring Well WDFPD-1D Monitoring Well WDFPD-2DR Monitoring Well WELL D-1D Monitoring Well A-5

Figure A-1 Sampling Locations near the Site Boundary of Braidwood Station, 2011 A-6

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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, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 GR-A (DIS) GR-A (SUS) GR-B (DIS) GR-B (SUS)

BL-03 03/16/11 < 166 BL-03 06/23/11 < 182 BL-03 09/21/11 < 186 BL-03 12/13/11 < 174 BL-06 03/16/11 < 164 BL-06 06/23/11 < 174 BL-06D 03/15/11 < 167 BL-06D 06/23/11 < 175 BL-09D 06/23/11 < 171 BL-10D 06/23/11 < 168 BL-11 03/16/11 < 167 BL-11 06/23/11 < 185 BL-11 09/21/11 < 181 BL-11 12/13/11 < 167 BL-11D 06/23/11 < 188 BL-1 2D 06/23/11 < 185 BL-13D 06/23/11 < 185 BL-14D 06/21/11 < 182 BL-14D 06/24/11 < 187 BL-15D 06/24/11 < 185 BL-16D 06/24/11 < 184 BL-17D 06/24/11 < 187 BL-19R 03/16/11 < 173 BL-19R 06/21/11 < 174 BL-19R 09/21/11 < 185 BL-19R 12/14/11

185 BL-20D 06/23/11 < 187 BL-21 03/16/11 < 167 BL-21 06/21/11 < 177 BL-21 09/21/11 < 181 BL-21 12/13/11 < 165 BL-22 03/15/11 < 169 BL-22 06/20/11 < 172 BL-22 09/19/11 < 186 BL-22 12/15/11 < 174 BL-23 03/15/11 < 169 BL-23 06/20/11 < 171 BL-23 09/19/11

179 BL-23 12/13/11 < 167 BL-24 03/15/11 < 168 BL-24 06/20/11 < 173 BL-24 09/19/11 < 182 BL-24 12/13/11 < 198 BL-25 03/15/11 < 167 BL-25 09/19/11 < 177 BL-25 12/15/11 < 167 BL-26 03/15/11 < 168 BL-26 06/20/11 < 171 BL-26 09/19/11 < 181 BL-26 12/12/11 < 194 BL-27 03/15/11 < 167 BL-27 06/20/11

172 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, 2011 RESULTS IN UNITS OF PCI/LITER +/-2 SIGMA COLLECTION SITE DATE H-3 SR-90 GR-A (DIS) GR-A (SUS) GR-B (DIS) GR-B (SUS)

BL-27 09/19/11 < 181 BL-27 12/13/11 < 197 C-1D 06/23/11 < 191 C-2D 06/23/11 < 188 CD-ID 06/22/11 < 176 D-2D 06/23/11 < 177 D-3D 06/23/11 < 181 F-1D 06/21/11 < 181 F-3D 06/23/11 < 191 F-5D 01/11/11 415 +/- 134 F-5D 02/11/11 609 +/- 127 F-5D 03/14/11 616 +/- 136 F-5D 04/13/11 594 +/- 141 F-5D 05/09/11 657 +/- 143 F-5D 06/21/11 577 +/- 145 F-5D 07/22/11 574 +/- 141 F-5D 08/16/11 519 +/- 136 F-5D 09/21/11 527 +/- 141 F-5D 10/19111 615 +/- 148 F-5D 11/22/11 675 +/- 143 F-5D 12/14/11 529 +/- 141 F-6D 01/11/11 < 183 F-6D 02/11/11 < 162 F-6D 03/16/11 < 167 F-6D 04/13/11 < 177 F-6D 05/09/11 < 170 F-6D 06/21/11 < 179 F-6D 07/22/11 < 184 F-6D 08/16/11 < 179 F-6D 09/21/11 < 186 F-6D 10/19/11 < 189 F-6D 11/22/11 < 177 F-6D 12/13/11 < 196 F-7D 06/21/11 315 +/- 130 F-7D 12/13/11 190 +/- 111 F-8D 06/23/11 240 +/- 126 F-8D 12/14/11 352 +/- 134 F-9D 01/11/11 392 +/- 131 F-9D 02/11/11 457 +/- 121 F-9D 03/16/11 466 +/- 128 F-9D 04/13/11 475 +/- 137 F-9D 05/09/11 531 +/- 135 F-9D 06/21/11 371 +/- 133 F-9D 07/22/11 300 +/- 128 F-9D 08/16/11 263 +/- 125 F-9D 09/22/11 < 198 F-9D 10/19/11 < 189 F-9D 11/23/11 < 174 F-9D 12/13/11 < 200 G-2D 06/24/11 < 187 MW-102R 03/16/11 < 167 MW-102R 06/20/11 < 170 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, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 GR-A (DIS) GR-A (SUS) GR-B (DIS) GR-B (SUS)

MW-102R 09/21/11 < 180 MW-102R 12/13/11 < 170 MW-103 03/17/11 < 171 MW-103 06/24/11 175 + 116 MW- 105 03/15/11 < 169 MW- 105 06/24/11 < 188 MW- 105D 06/24/11 < 186 MW- 109D 03/28/l1 < 169 MW-109D 06/27/11 < 189 MW- 109D 11/16/11 < 182 < 0.6 < 0.8 < 0.3 1.5 +/- 0.9 < 1.5 MW-l 03/09/11 317 + 124 MW-lI 06/29/11 782 + 143 MW-1l 09/13/11 606 +/- 152 MW-l 11/09/11 437 +/- 124 MW-11 12/06/11 274 + 129 < 0.8 < 0.8 < 0.5 6.6 +/- 1.2 < 1.7 MW-l11 03/15/11 < 170 MW-11o 06/23/11 < 176 MW-1O 09/22/11 < 188 MW-1O 11/15/11 < 181 < 0.7 < 1.0 < 0.3 18.7 +/- 1.6 < 1.5 MW-l1O 12/15/11 < 173 MW-1l1DR 03/14/11 < 166 MW-111DR 06/20/11 < 183 MW-111DR 09/22/11 < 189 MW-111DR 11/15/11 < 179 < 0.7 < 0.4 < 0.6 < 0.9 < 1.8 MW-111DR 12/15/11 < 173 MW-112D 02/22/11 < 174 MW-112D 03/15/11 < 170 MW-112D 06/21/11 < 181 MW-1 12D 09/22/11 < 187 MW-112D 11/15/11 < 182 < 0.7 < 0.9 < 0.6 3.1 +/- 1.1 < 1.8 MW-112D 12/15/11 < 171 MW-113 03/17/11 < 171 MW-113 06/24/11 < 189 MW-113 09/22/11 < 188 MW-113 11/30/11 < 181 < 0.7 < 0.5 < 0.6 2.0 +/- 0.8 < 1.8 MW-1 13DR 03/16/11 < 172 MW-1 13DR 06/24/11 < 173 MW-13 01/20/11 204 +/- 121 MW-13 04/28/11 < 172 < 0.8 < 0.6 < 0.9 2.0 +/- 1.0 < 2.0 MW-13 09/13/11 290 +/- 133 MW-13 11/09/11 435 +/- 122 MW-13 12/06/11 289 +/- 130 < 0.7 < 0.6 < 0.5 2.4 +/- 0.9 < 1.7 MW-130D 03/28/11 169 +/- 110 MW-130D 11/16/11 < 180 < 0.6 1.1 +/- 0.6 < 0.6 2.9 +/- 1.1 < 1.8 MW- 131D 03/14/11 < 167 MW-131D 06/20/11 < 171 MW-131D 09/22/11 < 188 MW-131D 11/15/11 < 180 < 0.6 < 0.6 < 0.6 4.2 +/- 1.1 < 1.8 MW-132D 03/15/11 < 169 MW-132D 06/20/11 < 191 MW-133D 03/16/11 < 172 MW- 133D 06/24/11 < 190 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, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 GR-A (DIS) GR-A (SUS) GR-B (DIS) GR-B (SUS)

MW-134D 03/16/11 < 168 MW-134D 06/24/11 < 192 MW-134D 09/22/11 < 186 MW-1 34D 11/23/11 < 177 <0.6 <0.4 < 0.6 2.4 +/- 0.7 < 1.6 MW-i 35D 03/16/11 < 165 MW-135D 06/22/11 < 174 MW-135D 09/22/11 < 189 MW-135D 11/22/11 < 178 <0.5 <0.8 < 0.6 < 1.4 < 1.6 MW-135D 12/14/11 < 170 MW- 136D 03/16/11 < 168 MW-136D 06/22/11 < 173 MW-1 36D 09/22/11 < 185 MW- 136D 11/22/11 < 181 <0.6 <0.8 < 0.6 2.6 +/- 0.9 < 1.6 MW-136D 12/14/11 < 186 MW-137D 06/23/11 < 172 MW-137D 11/22/11 < 178 <0.6 <0.8 < 0.9 2.4 +/- 1.0 < 2.1 MW-138D 03/16/11 < 169 MW-138D 06/22/11 < 170 MW-138D 09/22/11 < 183 MW-138D 11/22/11 < 181 <0.6 <1.1 <0.6 8.2 +/- 1.3 < 1.6 MW-138D 12/14/11 < 170 MW-139D 03/14/11 < 173 MW-139D 06/21/11 < 181 MW- 139D 09/22/11 < 188 MW-139D 11/22/11 < 177 < 0.6 0.9 +/- 0.5 < 0.5 19.1 +/- 1.5 < 1.6 MW-139D 12/14/11 < 163 MW-14 03/09/11 274 +/- 119 MW-14 09/13/11 318 +/- 137 MW-14 11/09/11 340 +/- 118 MW-14 12/06/11 298 +/- 130 MW- 140D 03/15/11 < 168 MW-140D 06/21/11 < 182 MW-141D 03/09/11 315 +/- 122 MW-141D 06/29/11 329 +/- 120 MW-141D 09/12/11 892 +/- 144 MW-1410 11/10/11 1120 +/- 164 MW-141D 12/02/11 1280 +/- 196 < 0.8 <3.4 <3.6 100 +/- 7.5 7.6 +/- 2.9 MW-142D 01/18/11 1160 +/- 174 MW- 142D 04/28/11 1370 + 194 < 0.8 < 13.2 < 2.0 66.4 +/- 12.6 < 7.9 MW-142D 09/12/11 1710 + 219 MW-142D 11/10/11 1740 _ 219 MW-142D 12/02/11 1290 + 197 < 0.6 <9.5 <3.5 59.3 +/- 7.9 < 4.3 MW-143D 09/14/11 < 195 MW-143D 11/07/11 238 + 129 MW-143D 12/01/11 < 191 < 0.6 < 0.5 < 0.3 9.5 +/- 0.9 < 1.5 MW-144D 03/10/11 3800 +/- 429 MW-144D 06/29/11 2600 +/- 307 < 0.7 MW-144D 09/13/11 3350 +/- 389 MW-144D 11/07/11 3430 +/- 395 MW-1 44D 12/01/11 2940 +/- 354 <0.7 < 0.6 < 0.3 5.6 +/- 0.9 < 1.5 MW-145D 03/16/11 666 +/- 138 MW-145D 06/22/11 < 180 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, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 GR-A (DIS) GR-A (SUS) GR-B (DIS) GR-B (SUS)

MW-145D 09/21/11 181 +/- 118 MW-145D 11/23/11 387 +/- 128 < 0.7 < 0.5 < 0.5 < 1.4 < 1.6 MW-145D 12/13/11 < 198 MW-154 03/10/11 197 +/- 123 MW- 154 11/16/11 221 +/- 128 MW-155 03/10/11 186 +/- 121 MW-155 11/16/11 < 191 MW-157D 03/16/11 < 171 MW-157D 06/22/11 < 179 MW-157D 09/21/11 < 179 MW-157D 12/13/11 < 191 MW-158D 01/11/11 < 187 MW-158D 02/11/11 < 160 MW-158D 03/14/11 < 173 MW-158D 04113/11 < 176 MW-158D 05/09/11 < 170 MW-158D 06/21/11 < 174 MW-158D 07/22/11 < 186 MW-158D 08/16/11 < 193 MW-158D 09/21/11 < 186 MW-158D 10/19/11 < 185 MW-158D 11/22/11 < 175 < 0.6 < 0.4 < 0,5 12.5 +/- 1.2 < 1.6 MW-158D 12/14/11 < 179 MW-159D 03/09/11 < 171 MW-159D 12/05/11 < 191 MW-160D 06/24/11 297 +/- 131 MW-161D 01/13/11 1030 +/- 163 MW-161D 04/28/11 814 +/- 147 < 0.9 < 0.9 < 0.9 6.3 +/- 1.4 < 2.0 MW-161D 09/14/11 709 +/- 160 MW-161D 11/10/11 565 +/- 131 MW-161D 12/07/11 514 +/- 140 < 0.7 < 1.0 < 0.7 5.4 +/- 1.2 < 1.7 MW-162D 02/23/11 904 +/- 152 MW-162D 09/14/11 877 +/- 166 MW-162D 11/10/11 780 +/- 139 MW-2 03/09/11 855 +/- 148 MW-2 05/23/11 1330 +/- 198 < 0.7 MW-2 08/18/11 1340 +/- 187 MW-2 11/10/11 1370 +/- 185 MW-2 12/05/11 918 +/- 160 < 0.8 2.0 +/- 0.7 < 0.8 3.7 +/- 0.9 < 1.6 MW-22 02/23/11 852 +/- 149 MW-22 06/29/11 866 +/- 168 < 0.7 MW-22 09/13/1i 1060 +/- 173 MW-22 11109/11 1180 +/- 170 MW-22 12/05/11 898 +/- 161 < 0.6 < 2.4 1.2 + 0.7 8.6 +/- 1.6 < 1.6 MW-4 01/13/11 1740 +/- 237 MW-4 04/28/11 1360 +/- 194 < 0.9 < 3.9 < 0.4 4.4 +/- 1.8 < 2.1 MW-4 08/18/11 1790 +/- 241 MW-4 11/10/11 1080 +/- 160 MW-4 12/02/11 967 +/- 164 < 0.6 < 0.9 < 0.8 4.3 +/- 1.1 < 1.6 MW-5 02/23/11 1120 +/- 171 MW-5 05/16/11 1130 +/- 168 < 0.7 MW-5 09/13/11 920 +/- 163 B-5

TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 GR-A (DIS) GR-A (SUS) GR-B (DIS) GR-B (SUS)

MW-5 11/07/11 1040 +/- 171 MW-5 12/01/11 855 +/- 156 < 0.6 < 0.7 1.4 +/- 0.8 2.4 +/- 0.8 2.7 +/- 1.3 MW-6 03/09/11 1190 +/- 177 MW-6 06/29/11 1270 +/- 181 MW-6 11/10/11 1490 +/- 197 MW-6 12/01/11 248 +/- 125 < 0.6 < 0.6 1.2 +/- 0.7 < 1.1 < 1.7 MW-7 01/13/11 1010 +/- 163 MW-7 04/28/11 1050 +/- 165 < 0.9 < 2.7 1.9 +/- 1.1 5.0 +/- 1.8 2.5 +/- 1.5 MW-7 09/13/11 1170 +/- 182 MW-7 11/07/11 1040 +/- 169 MW-7 12/01/11 414 +/- 136 < 1.6 1.1 +/- 0.7 3.0 +/- 1.2 < 1.7 MW-7 12/01/11 601 +/- 155 < 0.6 MW-9 02/23/11 408 +/- 128 MW-9 05/16/11 484 +/- 140 < 0.5 MW-9 09/13/11 629 +/- 153 MW-9 11/07/11 507 +/- 143 MW-9 12/01/11 492 +/- 138 < 0.6 < 1.4 < 0.5 20.5 +/- 1.8 < 1.7 MW-BW-201S 03/10/11 < 177 MW-BW-201S 09/14/11 277 +/- 139 MW-BW-201 S 11/09/11 342 +/- 117 MW-BW-201S 12/05/11 < 200 < 0.7 < 1.1 < 0.6 8.9 +/- 1.3 < 1.6 MW-BW-2021 04/28/11 216 +/- 117 < 0.7 < 5.0 < 0.4 9.1 +/- 2.0 < 2.1 MW-BW-202S 01/20/11 237 +/- 120 MW-BW-202S 05/23/11 197 +/- 129 < 0.7 MW-BW-202S 09/14/11 218 +/- 115 MW-BW-202S 11/09/11 406 +/- 123 MW-BW-202S 12/05/11 232 +/- 130 < 0.8 < 3.2 0.9 +/- 0.6 12.9 +/- 1.8 < 1.5 MW-BW-203S 02/23/11 < 173 MW-BW-203S 05/23/11 < 184 < 0.6 MW-BW-203S 09/14/11 < 182 MW-BW-203S 11/09/11 < 185 MW-BW-203S 12/06/11 < 190 < 0.6 < 1.8 <0.6 10.2 +/- 1.5 < 1.6 MW-BW-2071 03/10/11 644 +/- 140 MW-BW-2071 09/13/11 554 +/- 145 MW-BW-2071 11/10/11 744 +/- 137 MW-BW-2071 12/02/11 574 +/- 148 < 0.6 8.3 + 5.4 < 2.2 24.9 + 6.1 < 4.3 P-13D 06/22/11 681 +/- 140 P-13D 12/14/11 704 +/- 142 P-14D 06/21/11

177 P-2D 06/22/11

184 P-2D 11/22/11

176 P-4D 03/16/11 1120 +/- 167 P-4D 04/13/11 1050 +/- 168 P-4D 06/21/11 1080 +/- 169 P-4D 12/14/11 945 +/- 154 P-5D 06/22/11

173 PW-003 01/11/11

161 PW-006 01/11/11

187 PW-006 04/14/11

185 PW-006 06/21/11

182 PW-006 10/19/11

188 PW-006A 10/19/11

184 B-6

TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/-2 SIGMA COLLECTION SITE DATE H-3 SR-90 GR-A (DIS) GR-A (SUS) GR-B (DIS) GR-8 (SUS)

PW-006P 04/14/11 < 183 PW-006P 06/21/11 < 183 PW-006P 10/19/11 < 183 PW-011 01/12/11 < 161 PW-011 04/14/11 < 185 PW-011 07/22/11 < 181 PW-011 10/19/11 < 186 PW-015 06/21/11 < 181 PW-015 10/19/11 < 186 PW-016 01/12/11 < 161 PW-016 04/14/11 < 187 PW-016 07/22/11 < 184 PW-016 10/19/11 < 185 PW-013 01/11/11 < 189 PW-013 04/14/11 < 187 PW-013 07/22/11 < 183 PW-013 10/19/11 < 189 PW-604 04/13/11 < 184 PWG-060 09/22/11 < 183 RW-10 06/22/11 < 184 RW-5 02/11/11 179 +/- 115 RW-5 04/21/11 < 181 RW-5 07/13/11 < 199 RW-6 04/21/11 754 +/- 154 RW-6 06/27/11 587 +/- 136 RW-6 07/13/11 441 +/- 148 RW-7 04/21/11 < 186 RW-7 06/23/11 < 183 RW-9 06/22/11 < 179 S-ID 01/11/11 < 183 S-1D 02/11/11 < 161 S-1D 03/14/11 < 171 S-ID 04/13111 251 + 126 S-1D 05109/11 < 172 S-1D 06/21/11 < 180 S-1D 07/22/11 < 181 S-1D 08/16/11 < 179 S-1D 10/19/11 239 +/- 127 S-1D 11/22/11 < 179 S-ID 12/14/11 < 180 S-2D 06/21/11 < 179 S-2D 12/14/11 < 184 S-4D 06/21/11 < 193 S-7D 01/11/11 < 188 S-7D 03/14/11 < 170 S-7D 04/13/11 < 187 S-7D 05109/11 < 172 S-7D 06/21/11 < 181 S-7D 07/22/11 < 183 S-7D 08/18/11 < 181 S-8DR 01/11/11 < 184 S-8DR 03/14/11 < 174 B-7

TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/-2 SIGMA COLLECTION SITE DATE H-3 SR-90 GR-A (DIS) GR-A (SUS) GR-B (DIS) GR-B (SUS)

S-8DR 04/13/11 < 185 S-8DR 05/09/11 < 174 S-8DR 06/21/11 < 177 S-8DR 07/22/11 < 180 S-8DR 08/18/11 < 180 SC-1D 06/21/11 < 175 SC-2D 06/21/11 < 182 VB10-1 03/15/11 < 165 V810-1 06/20/11 < 174 VB10-1 09/19/11 < 182 VBIO-1 12/12/11 < 195 VB1-1 01/18/11 < 162 VB1-1 02/22/11 < 174 VB1-1 03/16/11 < 167 VB1-1 04/21/11 < 182 VB1-1 06/24/11 < 197 VB1-1 12/13/11 < 171 VB11-1 03/15/11 < 168 VB11-1 06/20/11 < 171 VB11-1 09/19/11 < 178 VB11-1 12/13/11 < 199 VIB1-12D 03/15/11 < 168 VBI-12D 06/20/11 < 178 VB1-ID 01/18/11 < 163 VB1-1D 04/21/11 < 181 VB1-6D 06120/11 < 179 VB1-7D 06/20/11 < 183 VB1-8D 06/20/11 < 181 VB1-9D 03/17/11 1290 +/- 185 VB1-9D 03/28/11 1640 +/- 211 VB1-9D 06/24/11 3680 +/- 417 VB2-10 01/12/11 < 161 VB2-10 03/16/11 < 164 VB2-10 04/12/11 < 187 VB2-10D 01/12/11 < 160 VB2-1OD 03/16/11 < 167 VB2-10D 04/12/11 < 187 VB2-10D 06/27/11 < 175 VB2-11 01/12/11 < 160 VB2-11 03/16/11 < 164 VB2-11 04/21/11 < 171 VB2-1ID 01/12/11 < 161 V12-11D 03/16/11 < 164 VB2-11D 04/21/11 < 174 VB2-11D 06/27/11 < 172 VB2-12 01/12/11 < 162 VB2-12 03/16/11 < 164 VB2-12 04/21/11 < 171 VB2-12D 01/12/11 < 163 VB2-12D 03/16/11 < 162 VB2-12D 04/21/11 < 175 VB2-12D 06/27/11 < 172 B-8

TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 GR-A (DIS) GR-A (SUS) GR-B (DIS) GR-B (SUS)

VB2-13 03/15/11 < 168 VB2-13 03120/11 < 176 VB2-13D 06/20/11 < 172 VB2-14 03/15/11 < 166 VB2-14 06/20/11 < 171 VB2-14D 03/15/11 < 171 VB2-14D 06/20/11 < 172 VB2-15D 03/15/11 < 170 VB2-15D 06/22/11 < 180 VB2-16 03/17/11 < 170 VB2-16 06/23/11 < 190 VB2-16D 03/17/11 < 169 VB2-16D 06/23/11 < 191 VB2-17 03/17/11 < 170 VB2-17 06/23/11 < 180 VB2-17D 03/17/11 < 174 VB2-17D 06/23/11 < 181 VB2-2D 06/24/11 < 190 VB2-5D 03/16/11 485 t 130 VB2-5D 06/27/11 346 +/- 123 VB2-5D 12/15/11 318 +/- 122 VB2-6D 03/16/11 192 +/- 112 V82-6D 06/24/11 < 193 VB2-6D 11/30/11 197 +/- 119 < 0.7 < 0.4 < 0.5 2.3 +/- 0.8 < 1.6 VB2-7D 06/24/11 < 191 VB2-9D 03/17/11 1040 +/- 163 VB2-9D 04/13/11 967 +/- 166 VB2-9D 06/21/11 501 +/- 139 VB2-9D 12/15/11 < 171 VB3-1 0D 06/24/11 < 172 VB3-2 03/16/11 < 168 VB3-2 06/20/11 < 169 VB3-2 09/21/11 < 180 VB3-2 12/13/11 < 172 VB3-4D 06/27/11 381 +/- 127 VB3-4D 12/15/11 249 +/- 119 VB3-7D 06/24/11 < 172 VB3-9D 06/24/11 < 186 VB4-1 03/16/11 < 173 VB4-1 06/21/11 < 178 V14-1 09/21/11 < 180 VB4-1 12/15/11 < 172 V84-5D 03/16/11 < 172 V84-5D 06/23111 < 192 VB4-6D 03/16/11 422 +/- 127 VB4-6D 04/13/11 349 +/- 135 VB4-6D 06/23/11 408 +/- 137 VB5-2 03/16/11 < 170 VB5-2 06/22/11 < 174 VB5-2 09/19/11 < 182 VB5-2 12/15/11 < 170 VB6-1 03/15/11 < 167 B-9

TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 GR-A (DIS) GR-A (SUS) GR-B (DIS) GR-B (SUS)

VB6-1 06/20/11 < 170 VB6-1 09/19/11 < 181 VB6-1 12/13/11 < 198 VB7-1 03/15/11 209 +/- 115 VB7-1 06/20/11 172 +/- 113 VB7-1 09/19/11 < 180 VB7-1 12/13/11 < 200 V18-2R 03/15/11 < 168 VB8-2R 06/20/11 < 170 VB8-2R 09/19/11 < 180 VB8-2R 12/12/11 < 194 VB9-1 03/15/11 < 166 VB9-1 06/20/11 < 173 V19-1 09/19/11 < 177 VB9-1 12/13/11 < 196 B-10

TABLE B-1.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 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 1-131 Cs-134 Cs-137 Ba-140 La-140 DATE MW-109D 11116111 < 13 <8 <1 <1 <2 <1 <2 <1 <2 <11 <1 <1 <29 <8 MW-l1 12/06/11 < 38 <88 <4 <5 <9 <4 <9 <5 <7 <13 <4 <4 <27 <9 MW-110 11,15/11 < 11 <7 <1 <1 <3 <1 <2 <1 <2 <12 <1 <1 <24 < 5 MW-111DR 11/15/11 < 11 <26 <1 <1 <3 <1 <2 <1 <2 <11 <1 <1 <22 <7 MW-112D 11/15/11 < 12 <21 <1 <1 <3 <1 <1 <1 <2 <11 <1 <1 <27 <7 MW-113 11/30/11 < 8 <6 <1 <1 <2 <1 <1 <1 <2 <8 <1 <1 <11 <3 MW-13 04/28/11 < 20 <43 <2 <2 <4 <1 <3 <2 <3 <11 <1 <1 <40 < 15 MW-13 12/06/11 < 36 <67 <3 <4 <9 <4 <6 <4 <6 <12 <3 <4 <26 <8 MW-130D 11/16/11 < 12 <6 <1 <1 <2 <1 <2 <1 <2 <11 <1 <1 < 30 <.8 MW-131D 11/15/11 < 12 <20 <1 <1 <3 <1 <2 <1 <2 <12 <1 <1 < 31 < 12 MW-134D 11/23/11 < 8 <5 <1 <1 <2 <1 <1 <1 <1 <13 <1 <1 <17 <5 MW-135D 11/22/11 < 11 <26 <1 <1 <2 <1 <2 <1 <2 <13 <1 <1 <22 <4 MW-136D 11/22/11 < 11 <8 <1 <1 <3 <1 <2 <1 <2 <10 <1 <1 <20 <7 MW-137D 11122/11 < 9 <6 <1 <1 <2 <1 <1 <1 <2 <12 <1 <1 <18 <4 MW-138D 11/22/11 < 11 <25 <1 <1 <3 <1 <2 <1 <2 <10 <1 <1 <22 <7 MW-139D 11/22/11 < 11 <8 <1 <1 <3 <1 <2 <1 <2 <11 <1 <1 <23 <6 MW-14 12/06/11 < 40 <42 <4 <4 <9 <5 <7 <5 <8 <14 <4 <4 <30 < 9 MW-141D 12/02/11 < 31 86+/-47 <3 <3 <7 <3 <7 <4 <6 <14 <3 <3 <28 < 11 MW-142D 04/28/11 < 12 63+/-35 <1 <1 <3 <1 <2 <1 <2 <9 <1 <1 <22 <8 MW-142D 12/02/11 < 28 85 +/-48 <3 <3 <6 <3 <5 <3 <5 <15 <2 <3 <27 <8 MW-143D 12/01/11 < 27 <31 <3 <3 <7 <2 <5 <3 <5 <14 <2 <3 < 26 < 10 MW-144D 06/29/11 < 81 <20 <3 <7 < 28 <2 <7 <8 <13 (1) <2 <2 (1) (1)

MW-144D 12/01/11 < 28 <28 <3 <3 <7 <3 <5 <3 <5 <15 <2 <3 <26 <9 MW-145D 11/23/11 < 12 <8 <1 <1 <2 <1 <2 <1 <2 <18 <1 <1 <21 <7 MW-154 11116/11 < 12 <9 <1 <1 <3 <1 <2 <1 <2 <11 <1 <1 <22 < 5 MW-155 11/16/11 < 16 <30 <1 <1 <3 <1 <2 <2 <3 <10 <1 <1 <27 < 9 MW-158D 11/22/11 < 11 50 +/-29 <1 <1 <2 <1 <2 <1 <2 <13 <1 <1 <22 <6 MW-159D 12/05/11 < 35 <34 <4 <4 <9 <3 <7 <4 <7 <15 <3 <4 <31 <9 (1) RESULT UNABLE TO BE CALCULATED DUE TO AGE OF SAMPLE AT TIME OF RECEIPT

TABLE B-I2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 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 1-131 Cs-134 Cs-137 Ba-140 La-140 DATE MW-161D 04/28/11 < 16 < 38 <2 <2 <5 <1 <3 <2 <3 <5 <1 <1 <38 <15 MW-161D 12/07/11 < 39 < 75 <4 <4 <10 <3 <7 <5 <8 <14 <4 <4 <30 <9 MW-2 05/23/11 < 111 < 34 <2 <8 <42 <2 <5 <11 < 16 (1) < 2 <2 (1) (1)

MW-2 12/05/11 < 41 < 33 <5 <4 <11 <4 <8 <5 <7 <15 <4 <4 <28 < 10 MW-22 06/29/11 < 73 < 30 <2 <5 <23 <2 <4 <6 <11 (1) < 2 <2 (1) (1)

MW-22 12/05/11 < 37 < 33 <3 <4 <8 <4 <7 <4 <7 <14 <4 <4 <28 <9 MW-4 04/28/11 < 21 < 13 <2 <2 <3 <1 <3 <2 <4 <9 <1 <1 <33 < 14 MW-4 12/02/11 < 23 < 20 <2 <2 <5 <2 <4 <3 <5 <10 <2 <2 <20 <6 MW-5 05/16/11 < 149 < 33 <2 <10 <54 <2 <6 <11 <19 (1) < 2 < 2 (1) (1)

MW-5 12/01/11 < 20 < 38 <2 <2 <5 <2 <4 <2 <4 <10 <2 <2 <18 <6 MW-6 12/01/11 < 17 < 16 <2 <2 <4 <2 <4 <2 <3 <8 <2 <2 <15 <5 MW-7 04/28/11 < 18 < 12 <1 <2 <4 <1 <4 <1 <3 <7 <1 <1 <36 <15 MW-7 12/01/11 < 19 < 38 <2 <2 <4 <2 <4 <2 <4 <9 <2 <2 <16 <5 MW-9 05/16/11 < 143 < 17 <3 <10 < 56 <2 <6 <13 < 20 (1) < 2 <2 (1) (1)

MW-9 12/01/11 < 22 < 21 <2 <2 <6 <2 <4 <2 <4 <11 <2 <2 <20 <7 MW-BW-201S 12/05/11 < 30 < 82 <3 <3 <8 <3 <6 <3 <6 <12 <2 <4 <28 < 10 MW-BW-2021 04/28/11 < 26 < 48 <2 <2 <6 <2 <3 <3 <5 <11 <2 <2 <53 < 15 MW-BW-202S 05/23/11 < 134 < 16 <3 <9 <44 <2 <6 <11 <19 (1) < 2 <2 (1) (1)

MW-BW-202S 12/05/11 < 34 < 27 <4 <4 <9 <3 <7 <4 <7 <14 <3 <4 <29 < 10 MW-BW-203S 05/23/11 < 132 < 16 <3 <10 <50 <2 <6 <12 < 19 (1) < 2 <2 (1) (1)

MW-BW-203S 12/06/11 < 39 < 70 <4 <4 <11 <4 <7 <5 <7 <13 <3 <.4 <29 < 9 MW-BW-2071 12/02/11 < 30 < 64 <3 <3 <8 <3 <6 <4 <6 <14 <3 <3 <29 <9 P-2D 11/22/11 <8 <5 <1 <1 <2 <1 <1 <1 <2 <13 <1 <1 <16 <5 VB2-6D 11/30/11 <9 <20 <1 <1 <2 <1 <1 <1 <2 <9 <1 <1 <12 <4 (1) RESULT UNABLE TO BE CALCULATED DUE TO AGE OF SAMPLE AT TIME OF RECEIPT

TABLE B-I.3 CONCENTRATIONS OF HARD-TO-DETECTS IN GROUNDWATER SAMPLES COLLECTED INTHE VICINITY OF BRAIDWOOD STATION, 2011 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-13 04/28/11 < 0.04 < 0.07 < 0.08 < 0.05 < 0.11 < 0.04 < 0.05 < 0.05 < 169 < 3.50 MW-145D 11/23/11 < 0.10 < 0.05 < 0.05 < 0.12 < 0.18 0.29 +/- 0.14 < 0.03 0.19 + 0.11 < 154 < 4.06 VB2-6D 11/30/11 < 0.11 < 0.08 < 0.12 < 0.15 < 0.10 < 0.10 < 0.07 < 0.07 < 108 < 4.08

TABLE B-II.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN SURFACE WATER SAMPLES COLLECTED INTHE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 DITCH (DS-2) 03/28/11 < 169 DITCH (DS-2) 07/13/11 < 191 DITCH (DS-2) 09/12/11 < 191 DITCH (DS-2) 11/08/11 < 196 DITCH (DS-2) 11/30/11 < 182 EXELON POND 03/15/11 < 167 EXELON POND 06/22/11 < 174 EXELON POND 09/12/11 252 + 114 EXELON POND 11/08/11 < 196 EXELON POND 11/08/11 < 183 EXELON POND 12/14/11 < 172 FATLAN POND 06/23/11 < 192 FATLAN POND 12/13/11 < 197 H DITCH 08/10/11 363 +/- 135 H DITCH 11/08/11 < 193 H DITCH 11/09/11 < 188 H-DITCH 03/10/11 159 +/- 99 H-DITCH 04/28/11 417 +/- 129 H-DITCH 07/13/11 < 167 H-DITCH 11/08/11 < 159 PWG-060-POND 09/22/11 < 185 SG-BW-103 07/13/11 < 191 SG-BW-105 02/22/11 < 172 SG-BW-105 06/30/11 < 167 < 0.7 SG-BW-105 08/18/11 < 165 SG-BW-105 11/08/11 < 190 SG-BW-105 11/30/11 < 190 SG-BW-106 01/18/11 < 163 SG-BW-106 04/21/11 < 187 SG-BW-106 07/13/11 < 165 SG-BW-106 08118/11 < 162 SG-BW-106 11/08/11 < 190 SG-BW-106 11/16/11 < 190 SW-05 04/14/11 < 187 SW-05 07/22/11 < 179 SW-05 10/19/11 < 186 SW-lOl 01/18/11 315 +/- 115 SW-lOl 04/21/11 < 173 SW-lOl 07/13/11 < 199 SW-101 08/18/11 258 t 116 SW-101 11/08/11 < 193 SW-1 02 02/22/11 < 174 SW-102 08/18/11 < 185 SW-102 11/08/11 < 195 SW-102 11/30/11 < 194 SW-103 03/10/11 218 +/- 119 SW-103 06/30/11 174 +/- 112 SW-103 08/18/11 367 +/- 120 B-14

TABLE B-II.1 CONCENTRATIONS OF TRITIUM AND STRONTIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SR-90 SW-103 11/08/11 226 +/- 130 SW-103 11/16/11 < 194 SW-104 A DITCH 01/18/11 < 174 SW-104A DITCH 04/21/11 254 +/- 122 SW-104 A DITCH 08/18/11 428 +/- 123 SW-104A DITCH 11/08/11 < 190 SW-104A DITCH 11/16/11 < 180 B-15

TABLE B-1I.2 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BRAIDWOOD STATION, 2011 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 1-131 Cs-1 34 Cs-1 37 Ba-1 40 La-140 DATE DITCH (DS-2) 11/30/11 < 11 < 23 <1 <1 <2 <1 <2 <2 < 10 <1 <1 < 13 <4 EXELON POND 11/08/11 < 12 <7 <1 <1 <3 <1 <2 <2 < 13 <1 <1 < 28 < 10 SG-BW-105 06/30/11 < 74 < 32 <2 <6 < 25 <2 <5 < 11 (1) <2 <2 (1) (1)

SG-BW-105 11/30/11 < 23 53 +/-34<2 <2 <6 <2 <4 <4 < 14 <2 <2 < 24 <7 SG-BW-106 04/21/11 <9 <5 <1 <1 <2 <1 <1 <2 < 11 < 0. < 0.5 < 46 < 13 SG-BW-106 11/16/11 < 12 < 21 <1 <1 <3 <1 <2 <2 <9 <1 <1 < 20 <7 SW-lol 04/21/11 < 10 < 16 <1 <1 <2 <1 <1 <2 < 11 <1 <1 < 51 < 14 SW-102 11/30/11 < 13 47 +/- 30 < 1 <1 <3 <1 <2 <2 < 11 <1 <1 < 13 <4 SW-103 11/16/11 < 12 <8 <1 <1 <3 <1 <2 <2 < 10 <1 <1 < 32 <9 SW-104 04/21/11 < 8 <6 <1 <1 <2 <1 <1 <1 < 14 <1 <1 < 15 <4 SW-104 11/16/11 < 13 <9 <1 <1 <3 <1 <2 <2 < 10 <1 <1 < 26 <9 (1) RESULT UNABLE TO BE CALCULATED DUE TO AGE OF SAMPLE AT TIME OF RECEIPT

ML12137A304

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

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