Text

Annual Radiological Environmental Operating Report, 1 January Through 31 December 2009
	ML101390394
Person / Time
Site:	Byron
Issue date:	12/31/2009
From:	; Exelon Nuclear, Teledyne Brown Engineering Environmental Services
To:	; Office of Nuclear Reactor Regulation
References
	1.10.0101, BYRON 2010-0039
	Download: ML101390394 (207)
	v • d • e

Docket No: 50-454 50-455 BYRON NUCLEAR GENERATING STATION UNITS 1 and 2 Annual Radiological Environmental Operating Report 1 January Through 31 December 2009 Prepared By Teledyne Brown Engineering Environmental Services Nuclear Byron Nuclear Generating Station Byron, IL 61010 May 2010 1 of 207

2 of 207 Table Of Contents I. Sum m ary and Conclusions ........................................................................................... 5 II. Introduction ........................................................................................................................ 7 A. O bjectives of the REM P ................................................................................... 7 B. Im plem entation of the O bjectives ..................................................................... 7 Ill. Program Description ..................................................................................................... 7 A. Sam ple Collection ............................................................................................. 7 B. Sam ple Analysis ............................................................................................. 10 C. Data Interpretation .......................................................................................... 10 D. Program Exceptions ...................................................................................... 11 E. Program Changes ........................................................................................... 13 IV. Results and Discussion ............................................................................................. 13 A. Aquatic Environm ent ...................................................................................... 13

1. Surface W ater ....................................................................................... 13

2. G round W ater ...................................................................................... 14

3. Fish ....................................................................................................... 15

4. Sedim ent .............................................................................................. 15 B. Atm ospheric Environm ent ............................................................................... 15

1. Airborne ............................................................................................... 15

a. Air Particulates ........................................................................... 15

b. Airborne Iodine .......................................................................... 16

2. Terrestrial ............................................................................................. 16

a. Milk ........................................................................................... 16

b. Vegetation ................................................................................. 17 C. Am bient Gam m a Radiation ............................................................................ 17 D. Land Use Survey ........................................................................................... 17 E. Errata Data .................................................................................................... 18 F. Summary of Results - Inter-laboratory Comparison Program ....................... 19 3 of 207

Appendices Appendix A Radiological Environmental Monitoring Report Summary Tables Table A-1 Radiological Environmental Monitoring Program Summary for Byron Nuclear Generating Station, 2009 Appendix B Location Designation, Distance & Direction, and Sample Collection &

Analytical Methods Tables Table B-i: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Byron Nuclear Generating Station, 2009 Table B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Byron Nuclear Generating Station, 2009 Figures Figure B-1: Inner and Outer Ring TLD Locations of the Byron Nuclear Generating Station, 2009 Figure B-2: Onsite Air Sampling Locations of the Byron Nuclear Generating Station, 2009 Figure B-3: Offsite Air Sampling Locations of the Byron Nuclear Generating Station, 2009 Figure B-4: Ingestion and Waterborne Exposure Pathway Sampling Locations of the Byron Nuclear Generating Station, 2009 Appendix C Data Tables and Figures - Primary Laboratory Tables Table C-1.1 Concentrations of Gross Beta in Surface Water Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2009.

Table C-1.2 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2009.

Table C-1.3 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2009.

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Table C-II. 1 Concentrations of Tritium in Ground Water Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2009.

Table C-II.2 Concentrations of Gamma Emitters in Ground Water Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2009.

Table C-111.1 Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2009.

Table C-IV.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2009.

Table C-V.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2009.

Table C-V.2 Monthly and Yearly Mean Values of Gross Beta Concentrations in Air Particulate Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2009.

Table C-V.3 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2009.

Table C-VI.1 Concentrations of 1-131 in Air Iodine Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2009.

Table C-VII.1 Concentrations of 1-1.31 in Milk Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2009.

Table C-VII.2 Concentrations of Gamma Emitters in Milk Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2009.

Table C-VIII.1 Concentrations of Gamma Emitters in Vegetation Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2009.

Table C-IX.1 Quarterly TLD Results for Byron Nuclear Generating Station, 2009.

Table C-IX.2 Mean Quarterly TLD Results for the Inner Ring, Outer Ring, Other and Control Locations for Byron Nuclear Generating Station, 2009.

Table C-IX.3 Summary of the Ambient Dosimetry Program for Byron Nuclear Generating Station, 2009.

Figures Figure C-i Surface Water - Gross Beta - Stations BY-12 and BY-29 (C) Collected in the Vicinity of BNGS, 2000 - 2009.

Figure 0-2 Surface Water Tritium - Stations BY-12 and BY-29 (C) Collected in the Vicinity of BNGS, 2000 - 2009.

Figure C-3 Ground Water - Tritium - Stations BY-14-1 and BY-18 Collected in the Vicinity of BNGS, 2000 - 2009.

Figure C-4 Ground Water - Tritium - Station BY-32 Collected in the Vicinity of BNGS, 2000 - 2009.

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Figure C-5 Ground Water - Tritium - Station BY-35 and BY-36 Collected in the Vicinity of BNGS, 2006 - 2009.

Figure C-6 Ground Water - Tritium - Station BY-37 Collected in the Vicinity of BNGS, 2006 - 2009.

Figure C-7 Air Particulate - Gross Beta - Stations BY-08 (C) and BY-21 Collected in the Vicinity of BNGS, 2000 - 2009.

Figure C-8 Air Particulate - Gross Beta - Stations BY-22 and BY-23 Collected in the Vicinity of BNGS, 2000 - 2009.

Figure C-9 Air Particulate - Gross Beta - Station BY-24 Collected in the Vicinity of BNGS, 2000 - 2009.

Figure C-10 Air Particulate - Gross Beta - Station BY-01 and BY-04 Collected in the Vicinity of BNGS, 2005 - 2009.

Figure C-1i1 Air Particulate - Gross Beta - Station BY-06 Collected in the Vicinity of BNGS, 2005 - 2009.

Appendix D Inter-Laboratory Comparison Program Tables Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2009 Table D-2 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2009 Table D-3 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering, 2009 Appendix E Effluent Report Appendix E-1 Data Tables and Figures Appendix F Meteorological Data Appendix G Annual Radiological Groundwater Protection Program Report (ARGPPR) 6 of 207

1. Summary and Conclusions This report on the Radiological Environmental Monitoring Program conducted for the Byron Nuclear Generating Station (BNGS) by Exelon covers the period 1 January 2009 through 31 December 2009. During that time period, 1,465 analyses were performed on 1,321 samples. In assessing all the data gathered for this report and comparing these results with preoperational data, it was concluded that the operation of BNGS had no adverse radiological impact on the environment.

Surface water samples were analyzed for concentrations of gross beta, tritium and gamma emitting nuclides. Ground water samples were analyzed for concentrations of tritium and gamma emitting nuclides. Gross beta 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. Non-plant produced Cesium-1 37 activity was found at both sediment locations and was consistent with data from previous years. No plant produced fission or activation products were found in fish or 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 results were less than the minimum detectable activity.

Cow milk samples were analyzed for concentrations of 1-131 and gamma emitting nuclides. All 1-131 results were below the minimum detectable activity.

No fission or activation products were found.

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

Environmental gamma radiation measurements were performed quarterly using thermoluminescent dosimeters. Levels detected were consistent with those observed in previous years.

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Intentionally left blank 8 of 207

II. Introduction Byron Station, a two-unit PWR station, is located about two miles east-of the Rock River and approximately three miles southwest of Byron in Ogle County, Illinois. The reactors are designed to have capacities of 1280 and 1254 MW gross, respectively. Unit One loaded fuel in November 1984 and went on line February 2, 1985. Unit Two went on line January 9, 1987. The station has been designed to keep releases to the environment at levels below those specified in the codes of federal regulations.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) and Global Dosimetry on samples collected during the period 1 January 2009 through 31 December 2009.

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 BNGS, REMP were collected for Exelon Nuclear by Environmental Inc. (Midwest Labs). This section describes the general 9 of 207

collection methods used by Environmental Inc. to obtain environmental samples for the BNGS REMP in 2009. Sample locations and descriptions can be found in Table B-1 and Figures B-1 through B-4, Appendix B.

Aquatic Environment The aquatic environment was evaluated by performing radiological analyses on samples of surface water, well water, fish, and sediment.

Two gallon water samples were collected weekly from two surface water locations (BY-12 and BY-29 [Control location]) and quarterly from six well water locations (BY-14-1, BY-18, BY-32, BY-35, BY-36 and BY-37). All samples were collected in new unused plastic bottles, which were rinsed with source water prior to collection. Fish samples comprising the flesh of freshwater drum, river carpsucker, shorthead redhorse and common carp were collected semiannually at two locations, BY-29 (control) and BY-31.

Sediment samples composed of recently deposited substrate were collected at two locations semiannually, BY-12 and BY-34.

Atmospheric Environment The atmospheric environment was evaluated by performing radiological analyses on samples of air particulate, airborne iodine, and milk. Airborne iodine and particulate samples were collected and analyzed weekly at eight locations (BY-01, BY-04, BY-06, BY-08, BY-21, BY-22, BY-23, and BY-24). The control location was BY-08. 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.

Milk samples were collected biweekly at three locations (BY-20-1, BY-26-1 and BY-30-1) from May through October, and monthly from November through April. The control location was BY-26-1. 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 (BY-Control, BY-Quad 1, BY-Quad 2, BY-Quad 3, and BY-Quad 4).

Various types of samples were collected and placed in new unused plastic bags, and sent to the laboratory for analysis.

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Ambient Gamma Radiation Direct radiation measurements were made using CaF 2 thermoluminescent dosimeters (TLD). The TLD locations were placed on and around the BNGS site as follows:

An inner ring consisting of 16 locations (BY-101, BY-102, BY-103, BY-104, BY-105, BY-106, BY-107, BY-108, BY-109, BY-110, BY-111, BY-112, BY-113, BY-114, BY-115, and BY-116) near and within the site perimeter representing fence post doses (i.e., at locations where the doses will be potentially greater than maximum annual off-site doses) from BNGS release.

An outer ring consisting of 16 locations (BY-201, BY-202, BY-203, BY-204, BY-205, BY-206, BY-207, BY-208, BY-209, BY-210, BY-21 1, BY-212, BY-213, BY-214, BY-215 and BY-216) extending to approximately 5 miles from the site designed to measure possible exposures to close-in population.

A special interest set consisting of seven locations (BY-301 -1, BY-302-1, BY-309-1, BY-309-2, BY309-3, BY-309-4 and BY-314-1) to measure possible exposures from on-site storage facilities.

An other set consisting of seven locations (BY-01, BY-04, BY-06, BY-21, BY-22, BY-23 and BY-24) at locations where air samplers are present.

The balance of one location (BY-08) representing 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 BNGS, if any, would be most significant;

3. On hills free from local obstructions and within sight of the vents (where practical);

4. And near the closest dwelling to the vents in the prevailing downwind direction.

Two TLDs - each comprised of two CaF 2 thermoluminescent phosphors enclosed in plastic - were placed at each location located at a minimum of 11 of 207

five feet above ground level. The TLDs were exchanged quarterly and sent to Global Dosimetry for analysis.

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 BNGS REMP in 2009. 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 surface water and air particulates.

2. Concentrations of gamma emitters in ground and surface water, air particulates, milk, fish, sediment and vegetation.

3. Concentrations of tritium in ground and surface water.

4. Concentrations of 1-131 in air and milk.

5. Ambient gamma radiation levels at various site environs.

C. Data Interpretation The radiological and direct radiation data collected prior to Byron Nuclear Generating Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Byron Nuclear Generating Station was considered operational at initial criticality. In addition, data were 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 BNGS 12 of 207

detection capabilities for environmental sample analysis.

The minimum detectable concentration (MDC) is defined above with the exception that the measurement is an after-the-fact estimate of the presence of activity.

2. Net Activity Calculation and Reportinq 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 effecting 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 water, ground water, milk and vegetation twelve nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, I-131, Cs-134, Cs-137, Ba-140, and La-140 were reported.

For fish, sediment, air particulate and milk eleven 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 2009 the BNGS REMP had a sample recovery rate in excess of 99%.

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 TLD BY-205-1 03/31/09 The first quarter of 2009 TLD result was greater BY-212-4 than 3 sigma A/I BY-22 05/05/09 No power to air sampler due to raccoon/transformer damage; power restored on 05/06/09

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Table D-1 LISTING OF SAMPLE ANOMALIES (cont'd)

Sample Location Collection Reason Type Code Date A/I BY-22 05/12/09 Low timer reading due to power outage in previous week All BY-06 06/16/09 Timer not running; estimated time and replaced TLD BY-215-4 06/29/09 TLD found on the ground near pole; remounted A/I BY-21 07/14/09 Low timer reading due to power outage for line repair SW BY-12 09/29/09 The 3rd quarter surface water composite greater than the LLD likely due to B1R16 outage liquid releases.

M BY-26-1 11/03/09 False positive 1-131 result due to interfering nuclide; recount showed increased 1-131 instead of expected decrease due to decay A/I BY-06 12/08/09 Timer would not reset; replaced All BY-04 12/29/09 Low timer reading likely due to power outage BY-22 from snowstorm BY-23 BY-24 Table D-2 LISTING OF MISSED SAMPLES Sample Location Collection Reason Type Code Date SW BY-29 01/06/09 No sample; ice on river SW BY-12 01/12/09 No sample; ice on river BY-29 SW BY-12 01/20/09 No sample; ice on river BY-29 SW BY-12 01/27/09 No sample; ice on river BY-29 SW BY-12 02/03/09 No sample; ice on river BY-29 TLD BY-202-1 06/29/09 Pole was moved due to construction in area; new location for TLD replacement 14 of 207

Table D-2 LISTING OF MISSED SAMPLES (cont'd)

Sample Location Collection Reason Type Code Date SS BY-12 10/27/09 Unable to obtain sediment sample due to high BY-34 river level; sample obtained on 11/10/09 SW BY-12 12/15/09 No sample; ice on river BY-29 SW BY-12 12/22/09 No sample; ice on river BY-29 SW BY-12 12/29/09 No sample; ice on river BY-29 Each program exception was reviewed to understand the causes of the program exception. Sampling and maintenance errors were reviewed with the personnel involved to prevent recurrence. Occasional equipment breakdowns and power outages 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 TLD station BY-309-1 was added to the sampling program on December 30, 2009.

TLD station BY-309-2 was added to the sampling program on December 30, 2009.

TLD station BY-309-3 was added to the sampling program on December 30, 2009.

TLD station BY-309-4 was added to the sampling program on December 30, 2009.

IV. Results and Discussion A. Aquatic Environment

1. Surface Water Samples were taken weekly and composited monthly at two 15 of 207

locations (BY-12 and BY-29). Of these locations only BY-12 located downstream, could be affected by Byron Nuclear Generating Station's effluent releases. The following analyses were performed.

Gross Beta Samples from both locations were analyzed for concentrations of gross beta (Table C-1.1, Appendix C). The values ranged from 3.4 to 8.8 pCi/l. Concentrations detected were consistent with those detected in previous years (Figure C-1, Appendix C).

Tritium Quarterly composites of weekly collections were analyzed for tritium activity (Table C-1.2, Appendix C). Tritium was detected in one sample at a concentration of 792 pCi/L. (Figure C-2, Appendix C).

Gamma Spectrometry Samples from both locations were analyzed for gamma emitting nuclides (Table C-1.3, Appendix C). No nuclides were detected, and all required LLDs were met.

2. Ground Water Quarterly grab samples were collected at six locations (BY-14-1, BY-18, BY-32, BY-35, BY-36 and BY-37). These locations could be affected by Byron Nuclear Generating Station's effluent releases. The following analyses were performed:

Tritium Quarterly grab samples from the locations were analyzed for tritium activity (Table C-11.1, Appendix C). No tritium was detected, and the required LLD was met (Figures C-3 through C-6, Appendix C).

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides (Table C-I1.2 Appendix C). No nuclides were detected, and all required LLDs were met.

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3. Fish Fish samples comprised of common carp, freshwater drum, river carpsucker, shorthead redhorse were collected at two locations (BY-29 and BY-31) semiannually. Location BY-31 could be affected by Byron Nuclear Generating Station's effluent releases.

The following analysis was performed:

Gamma Spectrometry The edible portion of fish samples from both locations was analyzed for gamma emitting nuclides (Table C-I11.1, Appendix C).

No nuclides were detected, and all required LLDs were met.

4. Sediment Aquatic sediment samples were collected at two locations (BY-12 and BY-34) semiannually. BY-12, located downstream, could be affected by Byron Nuclear Generating Station's effluent releases.

The following analysis was performed:

Gamma Spectrometry Sediment samples from both locations were analyzed for gamma emitting nuclides (Table C-IV.1, Appendix C). Cesium-137 was detected in both locations. The values ranged from 113 to 306 pCi/kg dry. Concentrations detected were consistent with those detected in previous years and are not a result of plant effluents.

No other nuclides were detected, 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: Nearsite samplers (BY-21, BY-22, BY-23 and BY-24), Far Field samplers within 4 km of the site (BY-01, BY-04, and BY-06) and the Control sampler between 10 and 30 km from the site (BY-08). The following analyses were performed:

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Gross Beta Weekly samples were analyzed for concentrations of beta emitters (Table C-V.1 and C-V.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 BNGS. The results from the' Nearsite locations (Group I) ranged from 7 to 41 E-3 pCi/m 3 with a mean of 20 E-3 pCi/m 3 . The results from the Far Field locations (Group II) ranged from 6 to 42 E-3 pCi/m 3 with a mean of 20 E-3 pCi/m 3 . The results from the Control location (Group Ill) ranged from 8 to 46 E-3 pCi/m 3 with a mean of 21 E-3 pCi/m 3 . Comparison of the 2009 air particulate data with previous years data indicate no effects from the operation of BNGS. In addition a comparison of the weekly mean values for 2009 indicate no notable differences among the three groups (Figures C-7 through C-11, Appendix C).

Gamma Spectrometry Weekly samples were composited quarterly and analyzed for gamma emitting nuclides (Table C-V.3, Appendix C). No nuclides were detected, and all required LLDs were met.

b. Airborne Iodine Continuous air samples were collected from eight locations (BY-01, BY-04, BY-06, BY-08, BY-21, BY-22, BY-23, and BY-24) and analyzed weekly for 1-131 (Table C-VI.1, Appendix C). No 1-131 was detected and the required LLD was met.

2. Terrestrial

a. Milk Samples were collected from three locations (BY-20-1, BY-26-1, and BY-30-1) biweekly May through October and monthly November through April. The following analyses were performed:

Iodine-131 Milk samples from all locations were analyzed for 18 of 207

concentrations of 1-131 (Table C-VII.1, Appendix C). No nuclides were detected, and all required LLDs were met.

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

b. Vegetation Vegetation samples were collected at five locations (BY-Control, BY-Quad 1, BY-Quad 2, BY-Quad 3 and BY-Quad

4) when available. Four locations (BY-Quad 1, BY-Quad 2, BY-Quad 3 and BY-Quad 4) could be affected by Byron Nuclear Generating Station's effluent releases. The following analysis was performed:

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

C. Ambient Gamma Radiation Ambient gamma radiation levels were measured utilizing Panasonic 814 (CaF 2 ) thermoluminescent dosimeters. Ninety-one TLD locations were established around the site. Results of TLD measurements are listed in Tables C-IX.1 to C-IX.3, Appendix C.

Most TLD measurements were below 30 mR/standard quarter, with a range of 17 to 34 mR/standard quarter. A comparison of the Inner Ring, Outer Ring, Special Interest, Other and Control Location data indicate that the ambient gamma radiation levels were comparable among the groups.

D. Land Use Survey A Land Use Survey conducted during August 2009 around the Byron Nuclear Generating Station (BNGS) was performed by Environmental Inc.

(Midwest Labs) for Exelon Nuclear to comply with the Byron Nuclear Generating Station's Offsite Dose Calculation Manual. The purpose of the survey was to document the nearest resident, livestock, and milk producing animals in each of the sixteen 22 1/2 degree sectors and garden 19 of 207

of greater than 500 square feet in each of the four 90 degree quadrants around the site. The results of this survey are summarized below.

Distance in Miles from the BNGS Vent Stacks Sector Residence Livestock Milk Farm Miles Miles Miles A N 1.2 5.2 12.0 B NNE 1.6 1.5 C NE 1.1 3.0 D ENE 1.4 4.2 E E 1.2 3.8 F ESE 1.5 1.3 G SE 1.7 4.3 H SSE 0.7 3.2 J S 0.6 3.6 K SSW 0.7 2.3 L SW 0.8 1.6 M WSW 1.6 1.6 4.5 N W 1.8 3.2 P WNV\ 1.6 5.8 Q NW 0.8 3.7

.R NNW 0.9 1.4 5.0 E. Errata Data

1. The 2008 vegetation control sample location distance (BY-Control) in Table B-1 is incorrectly listed as 6.8 miles. The correct distance for the sample location is 12.0 miles.

2. In 2009, an effort was undertaken to verify the accuracy of REMP sample locations. All REMP sample and census locations were measured via GPS as opposed to historical methods such as printed maps. As a result of using this updated technology, the coordinates for the vent stack release point as listed in the ODCM were found to be inaccurate by approximately 440 feet. The inaccuracy of this measurement affected the sector locations of one air sampler, one sediment sample, two environmental TLDs, and several land use census locations. Based on the different vent stack coordinates, some distances to the vent stack release point for REMP sample points, including nearest residents, are different in 2009 than they were in 2008. In addition, the sector designations for the following nearest residents also changed:

Sector A: 2008 resident is no longer nearest resident in Sector A. New resident identified.

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Sector D: 2008 resident is no longer in Sector D. New resident identified.

" Sector E: Industrial facility identified in 2009 that was not previously identified in 2008.

Sector G: 2008 resident is no longer in Sector G. New resident identified.

" Sector L: 2008 resident is no longer in Sector L. New resident identified.

Sector P: 2008 resident is no longer in Sector P. New resident identified.

" Sector Q: 2008 resident in Sector P is now the nearest resident in Sector Q.

All REMP sample point distances, census location distances, and directions listed in the 2009 AREOR reflect the newly acquired GPS data.

F. Summary of Results - Inter-Laboratory Comparison Program The primary 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.

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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, 17 out of 18 analytes met the specified acceptance criteria. One sample did not meet the specified acceptance criteria for the following reason:

1. Teledyne Brown Engineering's Analytics June 2009 Zn-65 in AP result of 137 pCi/L was higher than the known value of 101 pCi/L, resulting in a found to known ratio of 1.36. NCR 09-23 was initiated to investigate this failure. The failure appears to be a result of a slightly high bias on Detector 7. A recount on Detector 17 resulted in a Zn-65 result of 101 pCi/L. The detector has been tagged out-of-service until a recalibration can be performed. Detector 7 is not used for client samples.

For the secondary laboratory, Environmental, Inc., eleven out of 14 analytes met the specified acceptance criteria.

1. Environmental Inc.'s ERA April 2009 Cs-1 37 in water result of 147.7 pCi/L exceeded the lower control limit of 151.0 pCi/L. All gamma emitters showed a low bias. A large plastic burr found on the base of the Marinelli kept the beaker from sitting directly on the detector. Recounting in a different beaker gave an acceptable result of 155.33 +/- 14.55 pCi/L.

2. Environmental Inc.'s ERA April 2009 H-3 in water result of 22819 pCi/L exceeded the upper control limit of 22300 pCi/L. A recount of the original vials averaged 23,009 pCi/L. Reanalysis results were acceptable at 19,170 pCi/L. No cause could be found for the failure.

3. Environmental Inc.'s MAPEP January 2009 Sr-90 in AP result of 0.93 exceeded the upper control limit of 0.83. Reanalysis results 22 of 207

were acceptable at 0.54 +/- 0.12 Bq/filter. No cause could be found for the failure..

4. Environmental Inc.'s MAPEP July 2009 Sr-90 in soil result of 310.5 Bq/kg exceeded the lower control limit of 319 Bq/kg. Reanalysis results were acceptable at 363.3 Bq/kg. Incomplete separation of strontium from calcium could result in a higher recovery percentage and consequently lower reported activity.

The Inter-Laboratory Comparison Program provides evidence of "in control" counting systems and methods, and that the laboratories are producing accurate and reliable data.

23 of 207

APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT

SUMMARY

24 of 207

Intentionally left blank 25 of 207

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BYRON NUCLEAR GENERATION STATION, 2009 Name of Facility: BYRON DOCKET NUMBER: 50-454 & 50-455 Location of Facility: BYRON, IL REPORTING PERIOD: 2009 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER GR-B 23 4 4.8 5.1 5.1 BY-29 CONTROL 0 (PCI/LITER) (10/12) (7/11) (7/11) BYRON - UPSTREAM (3.4/8.8) (3.5/7.9) (3.5/7.9) 3.0 MILES N OF SITE H-3 8 200 725 <LLD 725 BY- 12 INDICATOR I (1/4) (1/4) OREGON POOL OF ROCK RIVER - DOWNSTREAM 4.5 MILES SSW OF SITE GAMMA 23 MN-54 15 <LLD <LLD 0 CO-58 15 <LLD <LLD 0 FE-59 30 <LLD <LLD 0 CO-60 15 <LLD <LLD 0 0

'k) ZN-65 30 <LLD <LLD 0

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

TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BYRON NUCLEAR GENERATION STATION, 2009 Name of Facility: BYRON DOCKET NUMBER: 50-454 & 50-455 Location of Facility: BYRON, IL REPORTING PERIOD: 2009 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

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

ZR-95 30 <LLD <LLD 0 1-131 NA <LLD <LLD 0 CS-134 15 <LLD <LLD 0 CS-137 18 <LLD <LLD 0 BA-140 60 <LLD <LLD 0 LA-140 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 BYRON NUCLEAR GENERATION STATION, 2009 Name of Facility: BYRON DOCKET NUMBER: 50-454 & 50-455 Location of Facility: BYRON, IL REPORTING PERIOD: 2009 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 H-3 24 200 <LLD NA 0 (PCI/LITER)

GAMMA 24 MN-54 15 <LLD NA 0 CO-58 15 <LLD NA 0 FE-59 30 <LLD NA 0 CO-60 15 <LLD NA 0 ZN-65 30 <LLD NA 0

,oc 0

K) NB-95 15 <LLD NA 0

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

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BYRON NUCLEAR GENERATION STATION, 2009 Name of Facility: BYRON DOCKET NUMBER: 50-454 & 50-455 Location of Facility: BYRON, IL REPORTING PERIOD: 2009 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 ZR-95 30 <LLD NA 0 (PCI/LITER) 1-131 NA <LLD NA 0 CS-134 15 <LLD NA 0 CS-137 18 <LLD NA 0 BA-140 60 <LLD NA 0 LA- 140 15 <LLD NA 0 0O FISH GAMMA 8 1'

(PCI/KG WET) MN-54 130 <LLD <LLD 0

-3

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 BYRON NUCLEAR GENERATION STATION, 2009 Name of Facility: BYRON DOCKET NUMBER: 50-454 & 50-455 Location of Facility: BYRON, IL REPORTING PERIOD: 2009 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 CO-58 130 <LLD <LLD 0 (PCI/KG WET)

FE-59 260 <LLD <LLD 0 CO-60 130 <LLD <LLD 0 ZN-65 260 <LLD <LLD 0 NB-95 NA <LLD <LLD ZR-95 NA <LLD <LLD 0 0

CS-134 130 <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 BYRON NUCLEAR GENERATION STATION, 2009 Name of Facility: BYRON DOCKET NUMBER: 50-454 & 50-455 Location of Facility: BYRON, IL REPORTING PERIOD: 2009 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 CS-137 150 <LLD <LLD 0 (PCI/KG WET)

BA-140 NA <LLD <LLD 0 LA-140 NA <LLD <LLD 0 SEDIMENT GAMMA (PCI/KG DRY) MN-54 NA <LLD NA 0 CO-58 NA <LLD NA 0 FE-59 NA <LLD NA 0 0

I'-. CO-60 NA <LLD NA 0

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

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BYRON NUCLEAR GENERATION STATION, 2009 Name of Facility: BYRON DOCKET NUMBER: 50-454 & 50-455 Location of Facility: BYRON, IL REPORTING PERIOD: 2009 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 ZN-65 NA <LLD NA 0 (PCI/KG DRY)

NB-95 NA <LLD NA 0 ZR-95 NA <LLD NA 0 CS-134 150 <LLD NA 0 CS-137 180 186 NA 236 BY-12 INDICATOR 0 (4/4) (2/2) OREGON POOL OF ROCK RIVER - DOWNSTREAM (113/306) (166/306) 4.5 MILES SSW OF SITE BA- 140 NA <LLD NA 0 t-j 0 LA-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-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR BYRON NUCLEAR GENERATION STATION, 2009 Name of Facility: BYRON DOCKET NUMBER: 50-454 & 50-455 Location of Facility: BYRON, IL REPORTING PERIOD: 2009 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 GR-B 416 10 20 21 21 BY-21 INDICATOR I (E-3 PCI/CU.METER) (363/364) (52/52) (52/52) BYRON NEARSITE NORTH (6/42) (8/46) (9/41) 0.3 MILES N 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 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 BYRON NUCLEAR GENERATION STATION, 2009 Name of Facility: BYRON DOCKET NUMBER: 50-454 & 50-455 Location of Facility: BYRON, IL REPORTING PERIOD: 2009 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-134 150 <LLD <LLD 0 CS-137 180 <LLD <LLD 0 BA-140 NA <LLD <LLD 0 LA-140 NA <LLD <LLD AIR IODINE GAMMA 416 (E-3 PCI/CU.METER) 1-131 70 <LLD <LLD 0 0

MILK 1-131 57 I <LLD <LLD 0 0-(PCI/LITER)

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 BYRON NUCLEAR GENERATION STATION, 2009 Name of Facility: BYRON DOCKET NUMBER: 50-454 & 50-455 Location of Facility: BYRON, IL REPORTING PERIOD: 2009 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 GAMMA 57 (PCI/LITER) 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 w

0~

ZR-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 BYRON NUCLEAR GENERATION STATION, 2009 Name of Facility: BYRON DOCKET NUMBER: 50-454 & 50-455 Location of Facility: BYRON, IL REPORTING PERIOD: 2009 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

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

CS-137 18 <LLD <LLD 0 BA-140 60 <LLD <LLD 0 LA-140 15 <LLD <LLD 0 VEGETATION GAMMA 10 (PCIUKG WET) MN-54 NA <LLD <LLD 0 CO-58 NA <LLD <LLD 0 0

FE-59 NA <LLD <LLD 0 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 BYRON NUCLEAR GENERATION STATION, 2009 Name of Facility: BYRON DOCKET NUMBER: 50-454 & 50-455 Location of Facility: BYRON, IL REPORTING PERIOD: 2009 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

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

ZN-65 NA <LLD <LLD 0 NB-95 NA <LLD <LLD 0 ZR-95 NA <LLD <LLD 0 1-131 60 <LLD <LLD 0 CS-134 60 <LLD <LLD 0 CS-137 80 <LLD <LLD 0 o'

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 BYRON NUCLEAR GENERATION STATION, 2009 Name of Facility: BYRON DOCKET NUMBER: 50-454 & 50-455 Location of Facility: BYRON, IL REPORTING PERIOD: 2009 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

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

LA-140 NA <LLD <LLD DIRECT RADIATION TLD-QUARTERLY 363 NA 24.9 21.6 29.0 BY-212-4 INDICATOR (MILLI-ROENTGEN/QTR.) (355/355) (8/8) (4/4)

(17/34) (18/25) (23/34) 4.7 MILES WSW w

00 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)

Intentionally left blank 39 of 207

APPENDIX B LOCATION DESIGNATION, DISTANCE & DIRECTION, AND SAMPLE COLLECTION & ANALYTICAL METHODS 40 of 207

Intentionally left blank 41 of 207

TABLE B-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Byron Nuclear Generating Station, 2009 Location Location Description Distance & Direction From Site A. Surface Water BY-12 Oregon Pool of Rock River, Downstream 4.5 miles SSW BY-29 Byron, Upstream (control) 3.0 miles N B. Ground/Well Water BY-14-1 3200 North German Church Road 1.0 miles SSE BY-18 McCoy Farmstead 0.7 miles SW BY-32 Ron Wolford Well 1.8 miles W BY-35 Vancko Well 2.0 miles WNW BY-36 Blanchard Well 1.0 miles NW BY-37 Alexander Well 1.8 miles WNW C. Milk BY-20-1 Ron Snodgrass Farm 4.7 miles WSW BY-26-1 Dennis Herbert (control) 12.8 miles N BY-30-1 Ebert Farm 5.0 miles NNW D. Air Particulates / Air Iodine BY-01 Byron 3.0 miles N BY-04 Paynes Point 5.0 miles SE BY-06 Oregon 4.7 miles SSW BY-08 Leaf River (control) 6.8 miles WNW BY-21 Byron Nearsite North 0.3 miles N BY-22 Byron Nearsite East-Southeast 0.4 miles SE BY-23 Byron Nearsite South 0.6 miles S BY-24 Byron Nearsite Southwest 0.6 miles SW E. Fish BY-29 Byron, Upstream (control) 3.0 miles N BY-31 Byron, Discharge 2.2 miles WNW F. Sediment BY-12 Oregon Pool of Rock River, Downstream 4.5 miles SSW BY-34 Rock River, Downstream 2.6 miles WNW G. Vegetation Quadrant 1 5186 N. Cox Road, Stillman Valley 4.9 miles ENE Quadrant 2 6274 Brick Road 4.7 miles SE Quadrant 3 2002 Deer Path Rd., Byron 0.9 miles SW Quadrant 4 722 Town Line Rd., Leaf River 4.5 miles NW Control 5631 Fair Oak Rd., Davis Junction 12.6 miles E H. Environmental Dosimetry - TLD Inner Ring BY-101-1 and -2 0.3 miles N BY-102-1 0.9 miles NNE BY- 102-2 1.0 miles NNE B-I 42 of 207

TABLE B-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Byron Nuclear Generating Station, 2009 Location Location Description Distance & Direction From Site BY-103-1 and -2 1.7 miles NE BY-103-3 0.43 miles NE BY-104-1 and -2 1.5 miles ENE BY-104-3 0.36 miles ENE BY-1 05-1 and -2 1.3 miles E BY-106-1 and -2 1.4 miles ESE BY-107-1 and -2 1.4 miles SE BY-107-3 0.47 miles SE BY-108-1 0.7 miles SSE BY-108-2 0.6 miles SSE BY-109-1 and -2 0.6 miles S BY-110-1 and -2 0.6 miles SSW BY-111-3 0.7 miles SW BY-111-4 0.8 miles SW BY-112-3 and -4 0.8 miles WSW BY-113-1 and -2 0.7 miles W BY-114-1 and-2 0.8 miles WNW BY-115-1 and -2 1.0 miles NW BY-116-1 and -2 1.4 miles NNW BY-1 16-3 0.85 miles NNW Outer Ring BY-201-3 4.5 miles N BY-201-4 4.4 miles N BY-202-1 5.0 miles NNE BY-202-2 4.8 miles NNE BY-203-1 4.8 miles NE BY-203-2 4.7 miles NE BY-204-1 4.2 miles ENE BY-204-2 4.1 miles ENE BY-205-1 and -2 3.8 miles E BY-206-1 4.1 miles ESE BY-206-2 4.4 miles ESE BY-207-1 4.2 miles SE BY-207-2 3.6 miles SE BY-208-1 4.0 miles SSE BY-208-2 3.7 miles SSE BY-209-1 and -4 3.7 miles S BY-210-3 and -4 3.9 miles SSW BY-211-1 and -4 4.9 miles SW BY-212-1 and -4 4.7 miles WSW BY-213-1 4.7 miles W BY-213-4 4.6 miles W BY-214-1 4.6 miles WNW BY-214-4 4.9 miles WNW BY-215-1 5.3 miles NW BY-215-4 5.2 miles NW BY-216-1 4.6 miles NNW BY-216-2 4.8 miles NNW B-2 43 of 207

TABLE B-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Byron Nuclear Generating Station, 2009 Location Location Description Distance & Direction From Site Special Interest BY-301-1 0.2 miles N BY-302-1 0.1 miles NNE BY-309-1 0.3 miles S BY-309-2 0.4 miles S BY-309-3 0.4 miles S BY-309-4 0.4 miles S BY-314-1 0.2 miles WNW Other BY-01-1 and -2 3.0 miles N BY-04-1 and -2 5.0 miles SE BY-06-1 and -2 4.7 miles SSW BY-21-1 and -2 0.3 miles N BY-22-1 and -2 0.4 miles SE BY-23-1 and -2 0.6 miles S BY-24-1 and -2 0.6 miles SW Control BY-08-1 and -2 6.8 miles WNW B-3 44 of 207

TABLE B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Byron Nuclear Generating Station, 2009 Sample Analysis Sampling Method Analytical Procedure Number Medium Surface Water Gamma Spectroscopy Monthly composite from TBE, TBE-2007 Gamma emitting radioisotope analysis weekly grab samples.

Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy Surface Water Gross Beta Monthly composite from TBE, TBE-2008 Gross Alpha and/or gross beta activity in weekly grab samples. various matrices Env. Inc., W(DS)-01 Determination of gross alpha and/or gross beta in water (dissolved solids or total residue)

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

Env. Inc., T-02 Determination of tritium in water (direct method)

Ground Water Gamma Spectroscopy Quarterly grab samples. TBE, TBE-2007 Gamma emitting radioisotope analysis Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy Ground Water Tritium Quarterly grab samples. TBE, TBE-2011 Tritium analysis in drinking water by liquid scintillation Env. Inc., T-02 Determination of tritium in water (direct method)

Fish Gamma Spectroscopy Semi-annual samples TBE-2007 Gamma emitting radioisotope analysis collected via electroshocking or other Env. Inc., GS-01 Determination of gamma emitters by techniques gamma spectroscopy Sediment Gamma Spectroscopy Semi-annual grab TBE, TBE-2007 Gamma emitting radioisotope analysis samples Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy Air Particulates Gross Beta One-week composite of TBE, TBE-2008 Gross Alpha and/or gross beta activity in continuous air sampling various matrices through glass fiber filter paper Env. Inc., AP-02 Determination of gross alpha and/or gross beta in air particulate filters Air Particulates Gamma Spectroscopy Quarterly composite of TBE, TBE-2007 Gamma emitting radioisotope analysis each station Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy Air Iodine Gamma Spectroscopy One-week composite of TBE, TBE-2007 Gamma emitting radioisotope analysis continuous air sampling through charcoal filter Env. Inc., 1-131-02 Determination of 1-131 in charcoal canisters by gamma spectroscopy (batch method)

Milk 1-131 Bi-weekly grab sample TBE, TBE-2012 Radioiodine in various matrices when cows are on pasture. Monthly all Env. Inc., 1-131-01 Determination of 1-131 in milk by anion other times exchange Milk Gamma Spectroscopy Bi-weekly grab sample TBE, TBE-2007 Gamma emitting radioisotope analysis when cows are on pasture. Monthly all Env. Inc., GS-01 Determination of gamma emitters by other times gamma spectroscopy Vegetation Gamma Spectroscopy Annual grab samples. TBE, TBE-2007 Gamma emitting radioisotope analysis Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy TLD Thermoluminescence Quarterly TLDs Global Dosimetry Dosimetry comprised of two Global Dosimetry CaF 2 elements.

B-4 45 of 207

TwDLOGO=D Figure B-1 Inner and Outer Ring TLD Locations of the Byron Nuclear Generating Station, 2009 B-5 46 of 207

I.RET STATMES OUMC OURVEY 37UfLMA VALLEY QUADRANW.Z OR, TOPOGRAPII. 75 NNUTES SENJE13 IMT

'a o' i iHIL 0 AIRSMPLI4 L N

'TIO Figure B-2 Onsite Air Sampling Locations of the Byron Nuclear Generating Station, 2009 B-6 47 of 207

BYRDN LEAF mUVmE hrr.

MORM ROOK RIVER 1 2 a 4 a MILES a

2I 4n H I 10 I*a

!!S;-==

AirSany ing L ion

B)onStaikon Figure B-3 Offsite Air Sampling Locations of the Byron Nuclear Generating Station, 2009 B-7 48 of 207

A LEW 11 S

£ MT 0 I 3~ 4 ULM 0Q a a M"I

WMIII

+WATF*

Figure B-4 Ingestion and Waterborne Exposure Pathway Sampling Locations of the Byron Nuclear Generating Station, 2009 B-8 49 of 207

APPENDIX C DATA TABLES AND FIGURES PRIMARY LABORATORY 50 of 207

Intentionally left blank 51 of 207

TABLE C-I.1 CONCENTRATIONS OF GROSS BETA IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BY-12 BY-29 PERIOD 01/06/09 - 01/06/09 3.7 +/- 2.3 (1) (1) 02/10109 - 02/24/09 6.1 +/- 1.9 (1) 5.6 +/- 1.8 (1) 03/03/09 - 03/30/09 8.8 +/- 2.2 7.9 +/- 2.1 04/07/09 - 04/28/09 4.5 +/- 2.1 5.2 +/- 2.2 05/05/09 - 05/25/09 3.9 +/- 2.1 < 3.0 06/02/09 - 06/30/09 4.2 +/-2.7 5.0 +/- 2.9 07/07/09 - 07/28/09 < 3.8 < 3.7 08/04/09 - 08/25/09 3.4 +/- 2.1 3.5 +/- 2.1 09/01/09 - 09/29/09 5.2 +/- 2.1 5.5 +/- 2.1 10/05/09 - 10/27/09 <3.4 < 3.4 11/03/09 - 11/24/09 4.1 +/- 2.0

2.9 12/01/09 - 12/08/09 3.8 +/- 2.2 (1) 3.7 +/- 2.2 (1)

MEAN 4.8 +/- 3.3 5.1 +/- 3.0 TABLE C-I.2 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED INTHE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BY-12 BY-29 PERIOD 01/06/09 03/30/09 < 164 < 163 04/07/09 06/30/09 < 188 < 110 07/07/09 09/29/09 725 +/- 149 (1) < 185 10/02/09 12/08/09 < 173 < 173 MEAN 725

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-1 52 of 207

TABLE C-l.3 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC 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 BY-12 01/06/09 - 01/06/09 <1 <1 <2 <1 <1 <1 <1 < 13 <1 <1 < 16 <4 02/10/09 - 02/24/09 <2 <2 <4 <2 <4 <2 <4 <8 <2 <2 < 16 <5 03/03/09 - 03/30/09 <1 <1 <3 <1 <2 <2 <2 < 14 <1 <1 <18 <6 04/07/09 - 04/28/09 <1 <1 <2 <1 <2 <1 <2 < 12 <1 <1 < 16 <5 05/05/09 - 05/25/09 <1 <1 <2 <1 <1 <1 <2 < 14 <1 <1 < 15 <5 06/02/09 - 06/30/09 <1 <2 <4 <1 <3 <2 <3 < 14 <1 <1 < 21 <6 07/07/09 - 07/28/09 <1 <1 <2 <1 <1 <1 <1 < 13 <1 <1 < 14 <5 08/04/09 - 08/25/09 <2 <2 <5 <2 <3 <2 <4 < 15 <2 <2 < 23 <6 09/01/09 - 09/29/09 <1 <1 <3 <1 <2 <1 <2 <9 <1 <1 < 14 <4 10/05/09 - 10/27/09 <1 <1 <2 <1 <2 <1 <2 < 13 <1 <1 < 18 <5 11/03/09 11/24/09 <1 <1 <3 <1 <2 <1 <2 < 14 <1

- <1 < 17 <5 12/01/09 12/08/09 <1 <1 <2 <1 <2 <1 <2 <1 <1

- < 14 < 17 <5 MEAN BY-29 01/06/09 - 01/06/09 (1) 02/10/09 - 02/24/09 <2 <2 <4 <2 <4 <2 <3 <8 <2 <2 < 15 <5 03/03/09 - 03/30/09 <1 <1 <2 <1 <2 <1 <2 < 12 <1 <1

16 <4 04/07/09 - 04/28/09 <1 <1 <2 <1 <1 <1 <2 < 12 <1 <1 < 15 <4 05/05/09 - 05/25/09 <1 <1 <2 <1 <2 <1 <2 < 15 <1 <1 < 17 <5 06/02/09 - 06/30/09 <1 <1 <3 <1 <3 <2 <3 < 13 <1 <1 < 19 <6 07/07/09 - 07/28/09 <1 <1 <2 <1 <1 <1 <1

13 <1 <1 < 15 <4 08/04/09 - 08/25/09 <2 <2 <4 <2 <3 <2 <4 < 14 <1 <2 < 21 <7 09/01/09 - 09/29/09 <1 <1 <3 <1 <2 <1 <2 <9 <1 <1 < 13 <4 10/05/09 - 10/27/09 <1 <1 <2 <1 <2 <1 <2 < 15 <1 <1 < 18 <5 11/03/09 - 11/24/09 <1 <1 <3 <1 <2 <1 <2 < 13 <1 <1 < 17 <5 12/01/09 - 12/08/09 <1 <1 <2 <1 <2 <1 <2 < 15 <1 <1 < 19 <5 MEAN 0

L-J (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION

TABLE C-I1.1 CONCENTRATIONS OF TRITIUM IN GROUND WATER SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION BY-14-1 BY-18 BY-32 BY-35 BY-36 BY-37 PERIOD 01/12/09 - 01/12/09 < 175 < 177 < 176 < 177 < 179 < 177 04/14/09 - 04/14/09 < 139 < 135 < 139 < 132 < 178 < 134 07/13/09 - 07/13/09 < 128 < 136 < 133 < 195 < 197 < 193 10/13/09 - 10/13/09 < 173 < 167

171 < 162 < 171 < 173 MEAN C-3 54 of 207

TABLE C-II.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUND WATER SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC 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 BY-14-1 01/12/09 - 01/12//09 <1 <1 <3 <1 <3 <2 <2 < 10 <1 <1 < 16 <5 04/14/09 - 04/14/ /09 <1 <1 <2 <1 <1 <1 <2 <9 <1 <1 < 12 <4 07/13/09 - 07/13/ /09 <3 <4 <8 <3 <6 <4 <8 < 14 <4 <4 < 23 <9 10/13/09 - 10/13//09 <3 <4 <9 <4 <7 <5 <6 <8 <4 <4 < 20 <7 MEAN BY-18 01/12/09 01/12/09 <2 <2 <4 <1 <3 <2 <3

12 <1 <1 < 19 <5 04/14/09 04/14/09 <1 <1 <3 <1 <2 <2 <2 < 12 <1 <1 < 17 <5 07/13/09 07/13/09 <5 <4 <9 <6 <8 <6 <7 < 14 <3 <3 < 35 <11 10/13/09 10/13/09 <5 <4 <9 <5 <9 <4 <7 <8 <4 <5

23 <9 MEAN BY-32 01/12/09 - 01/12/09 <2 <2 <4 <1 <3 <2 <3 < 12 <1 <2 < 19 <5 04/14/09 - 04/14/09 <1 <1 <3 <1 <2 <1 <2 < 11 <1 <1 < 14 <5 07/13/09 - 07/13/09 <3 <4 <7 <4 <8 < 4 <5 < 14 <3 <3 < 29 <5 10/13/09 - 10/13/09 <5 <5 <9 <4 <8 <5 <8 <8 <4 <4 < 20 <8 MEAN BY-35 01/12/09 - 01/12/09 <1 <1 <3 <1 <2 <2 <2 10 <1 <1 < 15 <5 04/14/09 - 04/14/09 <1 <1 <3 <1 <3 <1 <3 13 <1 <1 <18 <6 07/13/09 - 07/13/09 <4 <4 <6 <4 <8 <4 <8 14 <2 <4 < 26 <7 10/13/09 - 10/13/09 <4 <4 < 10 <5 <8 <5 <8 10 <4 <5 < 25 <7 MEAN BY-36 01/12/09 - 01/12/09 <2 <2 <4 <2 <3 <2 3 < 13 <1 <2 < 20 <6 04/14/09 - 04/14/09 <1 <1 <3 <1 <2 <1 2 < 12 <1 <1 < 16 <5 07/13/09 - 07/13/09 <4 <4

10 <4 <7 <4 8 < 15 <3 <4 < 33 < 11 10/13/09 - 10/13/09 <5 <5 < 10 <5 <9 <6 7 <9 <5 <5 < 23 <8 0

MEAN 0

TABLE C-11.2 CONCENTRATIONS OF GAMMA EMITTERS INGROUND WATER SAMPLES COLLECTED INTHE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC 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 BY-37 01/12/09 - 01/12/09 < 1 <2 <4 <1 <3 <2 <3 <12 <1 <1 <18 <6 04/14/09 04/14/09 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 11 <1 <1

- <14 <5 07/13/09 - 07/13/09 < 4 <3 <11 <4 <9 <5 <8 <13 <4 <4 <28 <10 10/13/09 - 10/13/09 < 4 <4 <7 <4 <8 <4 <7 <7 <4 <4 <18 <6 MEAN ON

,-0

TABLE C-I11.1 CONCENTRATIONS OF GAMMA EMITTERS IN FISH SAMPLES COLLECTED INTHE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD BY-29 Freshwater Drum 05/14/09 < 50 < 72 < 251 < 57 < 127

95

138 < 48 < 55

4090

1520 Shorthead Redhorse 05/14/09 < 54 < 84 < 217 < 48 < 104

89

141

50 < 48

4040

1160 Common Carp 10/14/09 < 59 < 61 < 144

52 < 114

79

77 < 48

48 < 795

254 Shorthead Redhorse 10/14/09 < 59 < 66 < 177

44 < 142

75

123

52

64

1120

185 MEAN BY-31 Common Carp 05/14/09 < 44

54

162

36 < 100

76 < 111

34 < 34

2880

839 Freshwater Drum 05/14/09

50 < 88

233

51

124

91

142

52 < 54

4090

1030 Common Carp 10/14/09

51

62

168 < 41 < 98

67

118

52 < 53

904

256 River Carpsucker 10/14/09

55

58

185

60

152

63

117

63 < 58

1290 < 280 MEAN 0~

0

TABLE C-IV.1 CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF PCI/KG DRY +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-1 34 Cs-137 Ba-140 La-140 PERIOD BY-12 05/19/09 < 107 < 103 < 222 < 102 < 196 < 117 < 176 < 86 3106 +/- 115 < 1050 < 294 11/10/09 < 81 < 94 < 223 < 85 < 194 < 106 < 192 < 75 1166 +/- 88 < 1230 < 387 MEAN - - - 236 +/- 198 BY-34 05/19/09 < 91 < 104 < 227 < 74 < 233 < 122 < 203 < 90 158 +/- 78 < 1070 < 298 11/10/09 < 73 < 82 < 212 < 59 < 180 < 103 < 157 < 65 113 +/- 61 < 1170 < 371 MEAN - - - 136 +/- 64 00

('-A 00

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES

TABLE C-V.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION GROUP I GROUP 11 IGROUP III PERIOD BY-21 BY-22 BY-23 BY-24 BY-01 BY-04 BY-06 BY-08 U

12/30/08 - 01/06/09 26 +/-5 20 +/- 5 27 +/- 5 31 +/- 5 32 +/- 5 26 +/- 5 27 +/- 5 29 +/- 5 01/06/09 - 01/12/09 33 +/-6 33 +/- 6 29 +/- 5 29 +/- 5 33 +/- 5 31 +/- 5 30 +/- 5 34 +/- 5 01/12/09 - 01/20/09 35 +/-5 31 +/- 5 28 +/- 5 38 +/- 5 36 +/- 5 32 +/- 5 34 +/- 5 32 +/- 5 01/20/09 - 01127/019 32 +/-5 35 +/- 5 33 +/-5 35 +/- 5 39 +/- 6 37 +/- 5 33 +/- 5 34 +/- 5 01/27/09 - 02/03/09 25 +/- 5 28 +/- 5 29 +/-5 29 +/- 5 27 +/- 5 25 +/- 5 28 +/- 5 28 +/- 5 02/03/09 - 02/10/09 24 +/-5 25 +/- 5 21 +/-5 24 +/- 5 27 +/- 5 28 +/- 5 24 +/- 5 27 +/- 5 02/10/09 - 02/17/09 25 +/-5 22 +/- 4 25 +/-5 22 +/- 4 24 +/- 5 24 +/- 5 23 +/- 4 22 +/- 4 02/17/09 - 02/24/09 29 +/- 5 26 +/- 5 27 +/-5 30 +/- 5 33 +/- 5 30 +/- 5 23 +/- 5 30 +/- 5 02/24/09 - 03/03/09 22 +/- 5 24 +/- 5 23 +/-5 24 +/- 5 21 +/- 5 19 +/- 5 18 +/- 4 20 +/- 5 03/03/09 - 03/10/09 15 +/- 4 22 +/- .5 23 +/-5 19 +/- 5 20 +/- 5 24 +/- 5 20 +/- 5 19 +/- 4 03/10/09 - 03/16/09 30 +/- 4 30 +/- 4 27 +/- 4 26 +/- 4 29 +/- 4 26 +/- 4 27 +/- 4 25 +/- 4 03/16/09 - 03/23/09 23 +/-4 25 +/- 5 21 +/- 4 24 +/- 5 22 +/- 4 25 +/- 5 20 +/- 4 23 +/- 4 03/23/09 - 03/30/09 18 +/- 4 14 +/- 4 11 +/-3 14 +/- 4 13 +/- 4 11 +/-4 11 +/-4 11 +/-4 03/31/09 - 04/07/09 18 +/- 4 17 +/- 4 14 +/-4 13 +/- 4 15 +/- 4 14 +/-4 16 +/-4 13 +/-4 04/07/09 - 04/14/09 19 +/- 4 20 +/- 4 20 +/-4 19 +/- 4 24 +/- 5 18 +/-4 18 +/-4 21 +/-4 04/14/09 - 04/21/09 17 +/-4 15 +/- 4 15 +/-4 15 +/- 4 16 +/- 4 16 +/-4 15 +/-4 15 +/-4 04/21/09 - 04/28/09 15 +/-4 17 +/- 4 14 +/-4 20 +/- 4 18 +/- 4 12 +/-4 14 +/-4 15 +/-4 04/28/09 - 05/05/09 14 +/-4 7+/-4 14 +/-4 18 +/- 4 18 +/- 4 18 +/-4 13 +/-4 14 +/-4 05/05/09 - 05/12/09 15 +/-4 10 +/-4 13 +/-4 14 +/- 4 12 +/- 4 11 +/-4 12 +/-4 12 +/-4 05/12/09 - 05/19/09 17 +/-4 14 +/-4 10 +/-4 10 +/- 4 17 +/- 4 12 +/-4 12 +/-4 13 +/-4 05/19/09 - 05/25/09 30 +/-5 23 +/-5 21 +/-5 22 +/- 5 23 +/- 5 25 +/-5 18 +/-4 26 +/-5 05/25/09 - 06/02/09 15 +/-4 13 +/-4 9+/-3 12 +/- 4 9+/-3 10 +/-3 11 +/-4 12 +/-4 06/02/09 - 06/09/09 14 +/-4 14 +/-4 8+/-4 12 +/- 4 9+/-4 11 +/-4 13 +/-4 11 +/-4 06/09/09 - 06/16/09 11 +/-4 16 +/-4 13 +/-4 20 +/- 4 12 +/-4 15 +/- 4 17 +/-4 16 +/-4 06/16/09 - 06/23/09 17 +/-4 17 +/-4 17 +/-4 16 +/- 4 23 +/-5 18 +/- 4 21 +/-4 18 +/-4 06/23/09 - 06/30/09 18 +/-4 20 +/-4 14 +/-4 17 +/- 4 16 +/-4 19 +/-4 19 +/-4 18 +/-4 06/30/09 - 07/07/09 15 +/-4 15 +/-4 8+/-4 9+/-4 15 +/-4 13 +/-4 10 +/-4 9+/-4 07/07/09 - 07/14/09 19 5 15 +/-4 15 +/-4 34 +/-5 12 +/-4 15 +/-4 16 +/-4 12 +/-4 07/14/09 - 07/21/09 9+/-4 8+/-4 7+/-4 10 +/-4 15 +/-5 12 +/-4 9+/-4 8+/-4 07/21/09 - 07/28/09 21 5 15 +/- 4 21 +/-5 15 +/-4 18 +/- 4 23 +/-5 20 +/-4 18 +/-4 07/28/09 - 08/04/09 16 +/- 4 18 +/- 5 14 +/-4 16 +/-4 16 +/- 4 13 +/-4 15 +/-4 14 .+/-4 08/04/09 - 08/11/09 16 +/- 4 15 +/- 4 16 +/-4 17 +/-4 17 +/- 4 17 +/-4 18 +/-4 21 +/-5 08/11/09 - 08/18/09 28 +/- 5 28 +/- 5 26 +/-5 22 +/-5 18 +/- 4 22 +/-5 23 +/- 5 22 +/- 5 08/18/09 - 08/25/09 14 +/- 4 11 +/-4 9+/-4 10 +/-4 8+/-4 6+/-4 12 +/- 4 10 +/- 4 08/25/09 - 09/01/09 14 +/- 4 18 +/-4 10 +/-4 15 +/-4 16 +/-4 13 +/-4 14 +/- 4 18 +/- 4 09/01/09 - 09/08/09 35 +/- 5 30 +/-4 22 +/-4 24 +/-4 27 +/-4 28 +/-4 26 +/- 4 35 +/- 5 09/08/09 - 09/15/09 35 +/- 6 38 +/-6 31 +/-5 35 +/-6 32 +/-5 33 +/-6 30 +/- 5 46 +/- 6 09/15/09 - 09/22/09 22 +/- 5 22 +/-5 15 +/-4 24 +/-5 23 +/-5 21 +/-5 21 +/- 5 26 +/- 5 09/22109 - 09/29/09 16 +/- 4 22 +/-5 19 +/-5 22 +/-5 18 +/-5 24 +/-5 21 +/- 5 25 +/- 5 09/29/09 - 10/05/09 9+/-4 14 +/-4 10 +/-4 11 +/-4 8+/-4 9+/-4 14 +/- 4 10/05/09 - 10/13/09 11 +/-4 13 +/-4 12 +/-4 12 +/-4 11 +/-4 9+/-4 13 +/- 4 13 +/- 4 10/13/09 - 10/19/09 17 +/-4 16 +/-4 10 +/-4 16 +/-4 14 +/-4 17 +/-5 11 +/-4 12 +/- 4 10/19/09 - 10/27/09 19 +/-4 11 +/-4 12 +/-4 15 +/-4 14 +/-4 14 +/-4 11 +/-4 15 +/- 4 10/27/09 - 11/03/09 23 +/-4 22 +/-4 21 +/-4 20 +/-4 18 +/-4 21 +/-4 17 +/-4 24 +/- 4 11/03/09 - 11/10/09 30 +/-5 29 +/-5 25 +/-4 29 +/-5 27 +/-4 29 +/-5 23 +/-4 28 +/- 4 11/10/09 - 11/17/09 19 +/-5 17 +/- 4 14 +/- 4 14 +/- 4 14 +/-4 17 +/- 4 17 +/-4 15 +/- 4 11/17/09 - 11/24/09 22 5 23 +/- 5 16 +/- 4 24 +/-5 24 +/-5 23 +/-5 24 +/-5 20 +/- 4 11/24/09 - 12/01/09 28 +/- 5 22 +/- 5 23 +/- 5 26 +/- 5 22 +/- 5 29 +/- 5 24 +/- 5 18 +/- 4 12/01/09 - 12/08/09 24 +/- 4 31 +/- 4 19 +/- 4 16 +/- 4 20 +/- 4 24 +/- 4 25 +/- 4 22 +/- 4 12/08/09 - 12/15/09 32 +/- 5 33 +/- 5 35 +/- 5 36 +/- 6 33 +/- 5 35 +/- 5 32 +/- 5 35 +/- 5 12/15/09 - 12/22/09 41 +/-6 36 +/- 6 25 +/- 5 39 +/- 6 41 +/- 6 42 +/- 6 40 +/- 6 39 +/- 6 12122/09 - 12/29109 27 +/-4 26 +/- 4 25 +/- 4 22 :L 4 31 +/- 4 26 +/- 4 28 +/- 4 24 +/- 4 MEAN 21 +/-15 21 +/-15 19 +/- 14 21 +/-16 21 +/-16 21 +/-16 20 +/- 14 21 +/-17

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES C-8 59 of 207

TABLE C-V.2 MONTHLY AND YEARLY MEAN VALUES OF GROSS BETA CONCENTRATIONS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA GROUP I - NEARSITE LOCATIONS GROUP II - FAR FIELD LOCATIONS GROUP III - CONTROL LOCATIONS COLLECTION MIN MAX MEAN+/- COLLECTION MIN MAX MEAN+/- COLLECTION MIN MAX MEAN+/-

PERIOD 2SD PERIOD 2SD PERIOD 2SD 12/30/08 - 02/03/09 20 38 30 8 12/30/08 02/03/09 25 39 31 +/- 8 12/30/08 02/03/09 28 34 31 +/- 5 02/03/09 - 03/03/09 21 30 24 5 02/03/09 03/03/09 18 33 25 +/- 9 02/03/09 03/03/09 20 30 25 +/- 9 03/03/09 - 03/31/09 11 30 21 + 12 03/03/09 03/30/09 11 29 21 +/- 12 03/03/09 03/30/09 11 25 20 +/- 12 03/31/09 - 04/28/09 13 20 17 5 03/30/09 04/28/09 12 24 16 +/- 6 03/30/09 04/28/09 13 21 16 +/- 7 04/28/09 - 06/02/09 7 30 15 + 11 04/28/09 06/02/09 9 25 15 +/- 10 04/28/09 06/02/09 12 26 15 +/- 12 06/02/09 - 06/30/09 8 20 15 +/- 6 06/02/09 06/30/09 9 23 16 +/- 9 06/02/09 06/30/09 11 18 16 +/- 7 06/30/09 - 07/28/09 7 34 15 +/- 13 06/30/09 07/28/09 9 23 15 +/- 8 06/30/09 07/28/09 8 18 11 +/- 9 07/28/09 - 09/01/09 9 28 17 +/- 11 07/28/09 09/01/09 6 23 15 +/- 9 07/28/09 09/01/09 10 22 17 +/- 10 09/01/09 - 09/29/09 15 38 26 +/-14 09/01/09 09/29/09 18 33 25 +/- 10 09/01/09 09/29/09 25 46 33 +/- 19 09/29/09 - 11/03/09 9 23 15 8 09/29/09 11/03/09 8 21 13 +/- 8 09/29/09 11/03/09 12 24 15 +/- 10 11/03/09 - 12/01/09 14 30 23 +/- 11 11/03/09 12/01/09 14 29 23 +/- 9 11/03/09 12/01/09 15 28 20 +/- 11 12/01/09 - 12/29/09 16 41 29 +/-14 12/01/09 12/29/09 20 42 31 +/- 15 12/01/09 12/29/09 22 39 30 +/- 16 12/30/08 - 12/29/09 7 41 20 +/- 15 12/30/08 - 12/29/09 6 42 20 +/- 16 12/30/08 - 12/29/09 8 46 21 +/- 17 0

0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES

-I'

TABLE C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED INTHE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF E-3 PCI/CU METER + 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD BY-01 12/30/08 - 03/30/09 <.4 <7 < 20 <2 < 11 <8 < 13 <3 <3 < 932 < 525 03/30/09 - 06/30/09 <3 <7 < 45 <3 <9 < 10 < 17 <4 <3 < 9770 < 2640 06/30/09 - 09/29/09 <5 < 14 < 55 <3 <14 < 16 < 24 <5 <4 < 18500 < 5540 09/29/09 - 12/29/09 <4 <5 < 14 <4 <3 <6 < 10 <3 <3 < 567 < 179 MEAN BY-04 12/30/08 - 03/30/09 <3 <5 < 17 <3 <6 <5 <9 <3 <2 < 665 < 342 03/30/09 - 06/30/09 <2 <6 < 28 <3 <7 <9 < 13 <3 <2 < 8130 < 2740 06/30/09 - 09/29/09 <3 <9 < 42 <4 < 11 < 12 < 20 <4 <3 < 14200 < 5690 09/29/09 - 12/29/09 <3 <6 < 20 <3 <8 <6 < 14 <3 <3 < 512 < 207 MEAN 0 BY-06 12/30/08 - 03/30/09 <4 <6 < 22 <3 < 11 <7

14 <4 <3 < 1150 < 256 03/30/09 - 06/30/09 <4 <9 < 34 <2 < 11 < 11 < 18 <3 <2 < 9760 < 2800 06/30/09 - 09/29/09 <4 < 11 < 56 <4 < 14 < 15 < 27 <<5 <4 < 18500 < 4950 09/29/09 - 12/29/09 <4 <5 < 17 <4 <6 <6 < 11 <3 <3 < 436

207 MEAN BY-08 12/30/08 - 03/30/09 <3 <5

18 <3 <6 <5 <9 <3 <2 < 829 < 241 03/30/09 - 06/30/09 <3 <7 < 32 <3 <8 < 10 < 18 <4 <3 < 7160 < 3600 06/30/09 - 09/29/09 <4 < 12 < 43 <4 <9 < 13

20 <3 <3 < 11100 < 4900 09/29/09 - 12/29/09 <4 <5 < 19 <4 <9 <6 < 10 <3 <3 < 416 < 229 MEAN BY-21 12/30/08 - 03/31/09 <3 <4 < 25 <3 <9 <8 < 14 <3 <4 < 1330 < 397 03/31/09 - 06/30/09 <3 <9 < 30 <3 <9 < 11 < 16 <3 <3 < 10200 < 4660 06/30/09 - 09/29/09 <3 <8 < 38 <3 <6 <9 < 17 <3 <3 < 8900 < 3440 09/29/09 - 12/29/09 <4 <7 < 24 <2 <8 <7 < 11 <3 <3 < 584 < 146 0

MEAN 0*

TABLE C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF E-3 PCI/CU METER + 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD BY-22 12/30/08 - 03/31/09 <3 <6 < 18 < 3 <8 <6 < 10 <3 <2 <955 < 485 03/31/09 - 06/30/09 <3 < 5 < 36 < 3 < 6 < 7 < 15 < 3 <2 < 7440 < 3130 06/30/09 - 09/29/09 <5 < 15 < 68 <4 < 16 < 14 < 25 < 5 <4 < 20100 < 6390 09/29/09 - 12/29/09 <4 < 7 < 10 < 2 < 7 <5 < 11 <4 <3 < 397 < 207 MEAN BY-23 12/30/08 - 03/31/09 <3 <5 < 18 <3 <7 <7 < 11 <3 <3 < 890 < 404 03/31/09 - 06/30/09 <4 < 12 < 40 <4 < 14 < 12 < 23 <5 <4 < 9900 < 3780 06/30/09 - 09/29/09 <3 <7 < 29 <3 <9 <9 <17 <2 <2 < 10100 < 3270 09/29/09 - 12/29/09 <4 <5 < 14 <2 <8 <5 < 12 <4 <3 < 438 < 104 MEAN BY-24 12/30/08 - 03/31/09 <4 <7 < 22. <3 < 12 <8 < 12 <4 <4 < 1150 < 491 03/31/09 - 06/30/09 <2 <6 < 36 <3 <9 <9 <15 <3 <2 < 7780 < 3200 06/30/09 - 09/29/09 <5 <12 < 57 <4 <16 < 18 < 25 <6 <4 < 21300 < 5860 09/29/09 - 12/29/09 <3 <6 < 16 <3 <9 <5 < 12 <3 <3 < 541 < 312 MEAN O

0

TABLE C-VI.1 CONCENTRATIONS OF 1-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF E-3 PCI/CU METER +/-2 SIGMA GROUPI I GROUPI 11 GROUP III COLLECTION PERIOD BY-21 BY-22 BY-23 BY-24 BY-01 BY-04 BY-06 BY-O8 12/30/08 -01/06/09 < 49 < 48 < 48 < 48 < 65 < 65 < 64 < 67 01/06/09 -01/12/09 < 52 < 51 < 52 < 52 < 28 < 51 < 52 < 50 01/12/09 -01/20/09 < 52 < 52 < 51 < 51 < 59. < 61 < 59 < 59 01/20/09 -01/27/09 < 59 < 56 < 56 < 56 < 59 < 44 < 58 < 58 01/27/09 -02/03/09 < 59 < 59 < 60 < 60 < 68 < 66 < 67 < 69 02/03/09 -02/10/09 < 56 < 57 < 56 < 56 < 55 < 56 < 30 < 54 02/10/09 -02/17/09 < 16 < 16 < 17 < 17 < 15 < 15 < 15 < 16 02/17/09 -02/24/09 < 51 < 40 < 39 < 39 < 50 < 50 < 51 < 25 02/24/09 -03/03/09 < 16 < 16 < 16 <<16 < 17 < 17 < 17 < 18 03/03/09 -03/10/09 <9 < 18 < 18 < 19 < 18 < 18 < 18 < 17 03/10/09 -03/16/09 < 43 < 43 < 43 < 44 < 60 < 62 < 62 < 61 03/16/09 -03/23/09 < 62 < 37 < 62 < 62 < 69 < 69 < 69 < 68 03/23/09 -03/30/09 < 22 < 21 < 21 < 21 < 24 < 25 < 24 < 24 03/31/09 -04/07/09 < 69 < 68 < 52 < 69 < 59 < 58 < 58 1<60 04/07/09 -04/14/09 < 47 < 47 < 47 < 47 < 65 < 66 < 66 < 64 04/14/09 -04/21/09 < 65 < 65 < 64 < 51 < 70 < 68 < 69 < 68 04/21/09 -04/28/09 < 63 < 63 < 64 < 64 < 63 < 64 < 63 < 63 04/28/09 -05/05/09 < 46 < 62 < 46 < 46 < 25 < 45 < 46 < 47 05/05/09 -05/12/09 < 57 < 66 < 57 < 57 < 66 < 67 < 66 < 64 05/12/09 -05/19/09 < 62 < 62 < 63 < 63 < 64 < 42 < 63 < 65 05/19/09 -05/25/09 < 68 < 64 < 64 < 64 < 37 < 68 < 68 < 65 05/25/09 -06/02/09 < 58 < 67 < 67 < 67 < 59 < 58 < 32 < 60 06/02/09 -06/09/09 < 33 < 33 < 33 < 33 < 33 < 32 < 32 < 31 06/09/09 -06/16/09 < 41 < 19 < 19 < 19 < 41 < 41 < 41 < 28 06/16/09 -06/23/09 < 55 < 55 < 55 < 30 < 57 < 56 < 56 < 53 06/23/09 -06/30/09 < 35 < 53 < 53 < 53 < 66 < 65 < 66 < 68 06/30/09 -07/07/09 < 43 < 43 < 44 < 19 < 66 < 29 < 67 < 65 07/07/09 -07/14/09 < 52 < 65 < 65 < 65 < 67 < 65 < 66 < 69 07/14/09 -07/21/09 < 55 < 55 < 54 < 54 < 34 < 35 < 35 < 34 07/21/09 -07/28/09 < 63 < 63 < 63 < 63 < 65 < 63 < 64 < 66 07/28/09 -08/04/09 < 44 < 44 < 44 < 44 < 34 < 35 < 35 < 33 08/04/09 -08/11/09 < 50 < 50 < 49 < 49 < 45 < 44 < 45 < 46 08/11/09 -08/18/09 < 37 < 37 < 37 < 37 < 41 < 43 < 42 < 42 08/18/09 -08/25/09 < 62 < 62 < 63 < 63 < 56 < 54 < 54 < 56 08/25/09 -09/01/09 < 58 < 58 < 58 < 58 < 53 < 53 < 53 < 51 09/01/09 -09/08/09 < 63 < 63 < 63 < 64 < 49 < 26 < 48 < 50 09/08/09 -09/15/09 < 53 < 53 < 53 < 53 < 48 < 49 < 49 < 47 09/15/09 -09/22/09 < 32 < 32 < 32 < 32 < 51 < 52 < 51 < 53 09/22/09 -09/29/09 < 69 < 69 < 69 < 70 <56

< < 57 < 57 < 55 09/29/09 -10/05/09 < 21 < 21 < 21 < 21 < 67 < 65 < 66 < 68 10/05/09 -10/13/09 < 68 < 68 < 68 < 67 < 52 < 54 < 53 < 52 10/13/09 -10/19/09 < 20 < 49 < 49 < 49 < 37 < 38 < 37 < 37 10/19/09 -10/27/09 < 60 < 60 < 60 < 60 < 50 < 49 < 49 < 48 10/27/09 -11/03/09 < 50 < 21 < 50 < 50 < 56 < 54 < 56 < 52 11/03/09 -11/10/09 < 64 < 64 < 65 < 65 < 53 < 55 < 54 < 51 11/10/09 -11/17/09 < 57 < 57 < 56 < 57 < 48 < 49 < 48 < 29 11/17/09 -11/24/09 < 68 < 68 < 68 < 68 < 59 < 59 < 59 < 58 11/24/09 -12/01/09 < 67 <<67 < 66 < 28 < 41 < 67 < 68 < 69 12/01/09 -12/08/09 < 49 < 49 < 50 < 50 < 53 < 53 < 53 < 51 12/08/09 -12/15/09 < 53 < 58 < 59 < 59 < 23 < 53 < 53 < 53 12/15/09 -12/22/09 < 69 < 69 < 70 < 70 < 62 < 61 < 61 < 61 12/22/09 -12/29/09 < 62 < 64 < 65 < 65 < 47 < 49 < 47 < 46 MEAN - - - - - - - -

C-12 63 of 207 C-12

TABLE C-VII.1 CONCENTRATIONS OF 1-131 IN MILK SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION CONTROL FARM INDICATOR FARM PERIOD BY-26-1 BY-20-1 BY-30-1 01/06/09 < 0.6 < 0.6 < 0.6 02/03/09 < 0.7 < 0.9 < 0.8 03/03/09 < 0.7 < 0.8 < 0.7 04/07/09 < 0.9 < 0.9 < 0.9 05/05/09 < 0.7 < 0.5 < 0.4 05/19/09 < 0.8 < 0.8 < 0.7 06/02/09 < 0.5 < 0.5 < 0.6 06/16/09 < 0.7 < 0.6 < 0.7 06/30/09 < 0.7 < 0.8 < 0.7 07/14/09 < 0.9 < 0.8 < 0.9 07/28/09 < 0.8 < 0.7 < 0.8 08/11/09 < 0.7 < 0.8 < 0.7 08/25/09 < 0.8 < 0.8 < 0.8 09/08/09 < 0.7 < 0.7 < 0.7 09/22/09 < 0.8 < 0.7 < 0.8 10/05/09 < 0.7 < 0.9 < 0.7 10/20/09 < 0.8 < 0.7 < 0.7 11/03/09 3.6 + 0.6 (1) < 0.8 < 0.6 12/01/09 < 0.6 < 0.9 < 0.8 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-13 64 of 207

TABLE C-VII.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140, La-140 PERIOD BY-20-1 01/06/09 <7 <8 < 13 <7 <13 <7 < 13 <6 <7 < 56 < 14 02/03/09 <4 <5 <11 <4 <9 <5 <8 <4 <5 < 34 <7 03/03/09 <5 <5 < 13 <5 <11 <5 <8 <4 <5

31 < 10 04/07/09 <2 <3 <8 <2 <6 <3 <5 <2 <2 < 34 < 11 05/05/09 <2 <2 <7 <2 <4 <2 <4 <1 <2 < 42 < 13

< 1 05/19/09 <1 <2 <4 <3 <2 <3 <1 <1 < 22 <7 06/02/09 <6 <5 < 13 <6 <11 <5 <9 <5 <5 < 23 < 10 06/16/09 <4 <5 < 12 <4 < 10 <5 <9 <4 <4 < 43 < 13 06/30/09 < 4* <5 < 11 <4 < 10 <6 <9 <4 <4 < 44 < 14 07/14/09 <5 <5 < 13 <5 < 11 <6 <9 <4 <5 < 34 < 10 07/28/09 <5 <6 < 13 <5 < 13 <6 <9 <5 <5 < 45 < 12 08/11/09 <3 <2 <7 <3 <6 <3 <4 <3 <3 < 13 <4 08/25/09 <4 <4 <11 <5 < 10 <5 <9 <4 <4 < 23 <6 09/08/09 <6 <8 < 15 <8 < 14 <6 < 13 <6 <6 < 45 < 14 09/22/09 <5 <6

14 <7 <13 <6 < 11 <5 <6 < 27 <8 10/05/09 <5 <5 < 13 <5 < 11 <5 <9 <4 <5

23 <8 10/20/09 <4 <4 <9 <4 <9 <4 <7 <4 <4 < 21 <7 11/03/09 <6 <7 < 18 <8 <15 <8 < 13 <6 <6 < 47 <12 12/01/09 <4 <5 < 12 <4 <9 <5 <8 <3 <4 < 38 < 10 MEAN 0

Utl 0-1

TABLE C-VII.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIODf PERIOD BY-26-1 01/06/09 <6 <7 < 17 <6 < 16 <7 < 14 <6 <7 < 52 < 14 02/03/09 <5 <6 < 17 <6 < 13 <6 < 11 <5 <6 < 46 < 11 03/03/09 <5 <6 < 12 <5 < 14 <5 < 10 <4 <5 < 32 <9 04/07/09 <2 <2 <5 <2 <4 <2 <4 <2 <2 < 32 < 8 05/05/09 <2 <2 <6 <2 <4 <2 <4 <1 <2 < 39 < 12 05/19/09 <1 <2 <4 <1 <3 <2 <3 <1 <1 < 24 <6 06/02/09 <5 <5 < 10 <5 < 11 <5 <8 <4 <5 < 22 <8 06/16/09 <4 <5 < 13 <5 < 11 <5 <9 <4 <4 < 42 < 14 06/30/09 <5 <4 <9 <5. <8 <5 <9 <4 <4 < 39 < 11 07/14/09 <7 <8 < 15 <7 < 17 <9 < 12 <7 <7 < 49 < 10 07/28/09 <5 <5 < 14 <4 < 10 <5 <9 <4 <5 < 41 < 11 08/11/09 <6 <6 < 14 <8 < 15 <6 < 10 <6 <6 < 28 <8 08/25/09 <4 <5 < 11 <5 < 11 <5 <8 <4 <5 < 23 <5 09/08/09 <6 <6 < 15 <5 < 10 <5 < 11 <4 <5 < 34 < 11 09/22/09 <6 <6 < 13 <5 < 14 <7 < 10 <5 <5 < 22 <8 10/05/09 <3 <4 < 11 <4 <9 <4 <8 <4 <5 < 22 <6 10/20/09 <5 <4 < 13 <6 < 11 <6 < 11 <5 <5 < 27 <7 11/03/09 <5 <6 < 13 <6 < 13 <5 <9 <5 <4 < 39 < 11 12/01/09 <4 <4 < 11 <4 <9 <4 <8 <3 <4 < 34 < 12 MEAN 0

0

TABLE C-VII.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-1 37 Ba-140 La-140 PERIOD BY-30-1 01/06/09 <5 <7 <15 <6

12 <7 <11 <5 <5 < 44

14 02/03/09 <5 <5 <13 <5

12 <6 <10 <4 <5 < 43 <13 03/03/09 <5 <6 <12 <5

12 <6 <9 <5 <6

36 <11 04/07/09 <2 <3 <7 <2 <5 <3 <5 <2 <2

38 <10 05/05/09 <2 <2 <6 <2 <4 <2 <4 <2 <2 < 44 <14 05/19/09 <2 <2 <5 <2 <4 <2 <4 <1 <2

26 <7 06/02/09 <6 <6 <14 <7 <12 <5 <10 <5 <6

28 <9 06/16/09 <3 <3 <8 <3 <6 <3 <6 <3 <3

29 <9 06/30/09 <4 <5 <12 <5 <10 <5 <9 <4 <4 <41 <12 07/14/09 <5 <5 <15 <6

12 <6 <12 <5 <6

38 <15 07/28/09 <5 <5 <13 <5

10 <5 <9 <4 <5

40 <15 C) 08/11/09 <4 <6 <14 <5 <13 <6 <9 <4 <5

28 <6 08/25/09 <7 <6

14 <7

14 <7 <11 <6 <7

30 <10 09/08/09 <5 <6 <13 <6

14 <7 <10 <5 <5 < 37 <14 09/22/09 <7 <6 <16 <8 <15 <7 <11 <7 <6

28 <10 10/05/09 <4 <4 <8 <5 <8 <4 <7 <3 <4

20 <6 10/20/09 <5 <5 <12 <5

10 <5 <9 <4 <5

25 <6 11/03/09 <4 <4 <12 <4 <10 <5 <9 <4 <5 < 33 <10 12/01/09 <4 <4 <10 <4

10 <5 <8 . <4 <4 <38 < 12 MEAN 0

-0.,

TABLE C-VIII.1 CONCENTRATIONS OF GAMMA EMITTERS INVEGETATION SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA STC 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 BY-CONTROL Potatoes 09/08/09 < 12 < 13 < 36 < 13 < 28 < 14 < 24 < 55 < 11 < 14 < 103 < 31 Swiss Chard 09/08/09 < 10 < 15 < 29 < 11 < 27 < 14 < 23 < 59 < 12 < 12 < 110 < 30 MEAN BY-QUAD 1 Cabbage 09/08/09 <5 <6 < 12 < 5 < 12 < 6 < 10 < 24 < 5 < 5 < 52 < 10 Potatoes 09/08/09 < 14 < 14 < 33 < 11 < 28 < 14 < 25 < 52 < 10 < 13 < 105 < 26 MEAN BY-QUAD 2 Beet greens 09/08/09 <11 < 12 < 19 < 7 <21 < 11 < 19 < 57 < 10 < 11 <.96 < 22 Beets 09/08/09 <9 <9 <26 <9 <21 < 11 < 17 < 50 < 9 < 10 < 92 < 19

-4 MEAN BY-QUAD 3 Kale 09/08/09 < 10 < 11 <26 < 10 < 22 < 12 < 20 < 55 < 9 < 11 < 100 < 28 Turnips 09/08/09 <7 <9 < 17 < 8 < 10 < 6 < 14 < 22 <6 < 6 < 49 < 14 MEAN BY-QUAD 4 Beet greens 09/09/09 < 10 < 11 < 24 < 13 < 26 < 14 < 23 < 51 < 10 < 11 < 112 < 28 Beets 09/09/09 <8 <8 <21 <8 < 19 <9 < 16 < 36 < 7 < 8 < 71 < 21 MEAN 00 00 0--

TABLE C-IX.1 QUARTERLY TLD RESULTS FOR BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER +/- 2 STANDARD DEVIATIONS STATION MEAN JAN - MAR APR - JUN JUL - SEP OCT - DEC CODE +/- 2 S.D.

BY-01-1 21.8 +/- 6.4 25 19 19 24 BY-01-2 21.5 +/- 7.0 24 18 19 25 BY-04-1 23.8 +/- 5.3 26 21 22 26 BY-04-2 24.0 +/- 5.9 26 21 22 27 BY-06-1 22.3 +/- 6.0 26 19 21 23 BY-06-2 22.0 +/- 7.1 24 19 19 26 BY-08-1 21.8 +/- 5.3 23 18 22 24 BY-08-2 21.5 +/- 7.0 25 18 19 24 BY-21-1 21.3 +/- 3.0 23 20 20 22 BY-21-2 20.0 +/- 3.7 21 18 19 22 BY-22-1 25.8 +/- 6.6 29 22 24 28 BY-22-2 26.0 +/- 5.2 29 23 25 27 BY-23-1 24.3 +/- 5.5 27 21 23 26 BY-23-2 24.3 +/- 5.3 28 22 23 24 BY-24-1 23.8 +/- 7.5 27 20 21 27 BY-24-2 25.3 +/- 10 28 21 21 31 BY-101-1 20.8 +/- 5.5 24 18 19 22 BY-101-2 21.0 +/- 7.3 23 17 19 25 BY-102-1 26.8 +/- 5.7 30 23 27 27 BY-1 02-2 27.0 +/- 6.3 28 25 24 31 BY-103-1 25.0 +/- 5.9 27 22 23 28 BY-1 03-2 25.5 +/- 6.0 29 23 23 27 BY-103-3 26.0 +/- 6.3 29 22 25 28 BY-104-1 25.5 +/- 7.0 28 22 23 29 BY-1 04-2 25.3 +/- 6.6 29 22 23 27 BY-104-3 24.0 +/- 6.3 28 21 22 25 BY-105-1 25.8 +/- 7.7 28 22 23 30 BY-1 05-2 26.5 +/- 7.4 28 23 24 31 BY-1 06-1 25.8 +/- 7.0 27 24 22 30 BY-106-2 25.5 +/- 7.0 28 22 23 29 BY-107-1 28.3 +/- 7.5 31 25 25 32 BY-107-2 28.3 +/- 6.6 30 25 26 32 BY-107-3 22.3 +/- 5.3 25 20 20 24 BY-1 08-1 27.5 +/- 2.6 29 26 28 27 BY-108-2 24.5 +/- 7.4 27 20 23 28 BY-109-1 25.0 +/- 4.3 27 25 22 26 BY-109-2 24.8 +/- 5.5 28 23 22 26 BY-110-1 23.3 +/- 7.5 28 22 19 24 BY-110-2 24.3 +/- 8.9 27 20 21 29 BY-111-3 25.3 +/- 3.8 28 24 24 25 BY-111-4 25.5 +/- 5.3 27 22 25 28 BY-112-3 25.3 +/- 3.4 27 23 25 26 BY-112-4 25.5 +/- 6.2 27 24 22 29 BY-113-1 25.5 +/- 4.8 28 23 24 27 BY-113-2 22.0 +/- 4.9 25 20 20 23 BY-114-1 23.5 +/- 8.7 29 20 20 25 BY-1 14-2 24.5 +/- 6.2 28 23 21 26 BY-115-1 24.0 +/- 6.3 28 21 22 25 BY-115-2 23.5 +/- 5.3 25 20 23 26 C-18 69 of 207

TABLE C-IX.1 QUARTERLY TLD RESULTS FOR BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER +/- 2 STANDARD DEVIATIONS STATION MEAN JAN - MAR APR - JUN JUL - SEP OCT - DEC CODE +/-2 S.D.

BY-116-1 24.5 +/- 3.8 26 22 24 26 BY-116-2 24.3 +/- 7.5 27 21 21 28 BY-116-3 24.8 +/- 6.4 26 20 26 27 BY-201-3 25.0 +/- 9.4 28 21 21 30 BY-201-4 26.3 +/- 4.7 28 23 26 28 BY-202-1 27.0 +/- 3.5 26 (1) 26 29 BY-202-2 26.8 +/- 5.5 28 25 24 30 BY-203-1 21.3 +/- 6.4 24 19 18 24 BY-203-2 24.3 +/- 7.5 27 21 21 28 BY-204-1 24.0 +/- 4.9 24 21 24 27 BY-204-2 26.5 +/- 4.8 28 24 25 29 BY-205-1 27.3 +/- 9.4 34 24 24 27 BY-205-2 23.8 +/- 5.3 26 22 21 26 BY-206-1 25.8 +/- 5.5 29 24 23 27 BY-206-2 25.8 +/- 4.4 28 23 25 27 BY-207-1 25.3 +/- 4.1 27 23 24 27 BY-207-2 26.3 +/- 8.7 30 23 22 30 BY-208-1 27.5 +/- 7.4 29 24 25 32 BY-208-2 27.5 +/- 6.8 26 28 24 32 BY-209-1 26.0 +/- 7.7 27 23 23 31 BY-209-4 26.0 +/- 4.6 28 24 24 28 BY-210-3 25.8 +/- 8.2 27 22 23 31 BY-210-4 25.3 +/- 6.6 27 22 23 29 BY-211-1 25.8 +/- 7.7 28 22 23 30 BY-211-4 25.8 +/- 6.4 28 23 23 29

.BY-212-1 27.3 +/- 4.7 29 24 27 29 BY-212-4 29.0 +/- 9.9 34 23 27 32 BY-213-1 26.8 +/- 5.5 28 25 24 30 BY-213-4 27.3 +/- 4.7 29 24 27 29 BY-214-1 24.8 +/- 5.0 28 22 24 25 BY-214-4 25.3 +/- 7.5 28 22 22 29 BY-215-1 26.0 +/- 4.9 29 24 24 27 BY-215-4 26.8 +/- 4.1 29 24 27 27 BY-216-1 28.3 +/- 5.3 30 26 26 31 BY-216-2 25.3 +/- 4.4 28 24 23 26 BY-301-1 20.3 +/- 4.1 22 18 19 22 BY-302-1 23.8 +/- 3.0 25 22 23 25 BY-309-1 23.5 +/- 2.0 23 23 21 25 BY-309-2 23.5 +/- 4.8 26 22 23 25 BY-309-3 24.3 +/- 7.7 27 22 21 28 BY-309-4 21.8 +/- 3.0 23 20 20 23 BY-314-1 22.5 +/- 4.8 25 20 21 24 (1) SEE PROGRAM EXCEPTIONS SECTIOIN FOR EXPLANATION C-19 70 of 207

TABLE C-IX.2 MEAN QUARTLY TLD RESULTS FOR THE INNER RING, OUTER RING, SPECIAL INTEREST, OTHER AND CONTROL LOCATIONS FOR BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF MILLI-ROENTGENS/QUARTER +/- 2 STANDARD DEVIATIONS OF THE STATION DATA COLLECTION INNER RING OUTER RING SPECIAL INTEREST OTHER CONTROL PERIOD +/- 2 S.D.

JAN-MAR 27.5 +/- 3.3 28.1 +/- 4.2 23.4 +/- 3.2 25.9 +/- 4.7 24.0 +/- 3 APR-JUN 22.1 +/- 4.0 23.2 +/- 3.4 22.3 +/- 5.5 20.3 +/- 3.1 18.0 +/- 0.0 JUL-SEP 22.9 +/- 4.4 23.8 +/- 4.1 23.0 +/- 6.6 21.3 +/- 4.0 20.5 +/- 4 OCT-DEC 27.2 +/- 4.8 28.6 +/- 4.1 22.4 +/- 3.8 25.6 +/- 4.9 24.0 +/- 0.0 TABLE C-IX.3

SUMMARY

OF THE AMBIENT DOSIMETRY PROGRAM FOR BYRON NUCLEAR GENERATING STATION, 2009 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER LOCATION SAMPLES PERIOD PERIOD PERIOD MEAN ANALYZED MINIMUM MAXIMUM +/- 2 S.D.

INNER RING 144 17 32 24.9 +/- 6.4 OUTER RING 127 18 34 26.0 +/- 6.3 SPECIAL INTEREST 28 18 28 22.8 + 4.8 OTHER 56 18 31 23.3 +/- 6.5 CONTROL 8 18 25 21.6 +/- 5.8 INNER RING STATIONS - BY-101-1, BY-101-2, BY-102-1, BY-102-2, BY-103-1, BY-103-2, BY-103-3, BY-104-1, BY-104-2, BY-104-3, BY-105-1, BY-105-2, BY-106-1, BY-106-2, BY-107-1, BY-107-2, BY-107-3, BY-108-1, BY-108-2, BY-109-1, BY-109-2, BY-110-1, BY-110-2, BY-111-3, BY-111-4, BY-112-3, BY-112-4, BY-113-1, BY-113-2, BY-114-1, BY-114-2, BY-115-1, BY-115-2, BY-116-1, BY-116-2, BY-116-3 OUTER RING STATIONS - BY-201-3, BY-201-4, BY-202-1, BY-202-2, BY-203-1, BY-203-2, BY-204-1, BY-204-2, BY-205-1, BY-205-2, BY-206-1, BY-206-2, BY-207-1, BY-207-2, BY-208-1, BY-208-2, BY-209-1, BY-209-4, BY-210-3, BY-210-4, BY-211-1, BY-211-4, BY-212-1, BY-212-4, BY-213-1, BY-213-4, BY-214-1, BY-214-4, BY-215-1, BY-215-4, BY-216-1, BY-216-2 SPECIAL INTEREST STATIONS - BY-301-1, BY-302-1, BY-309-1, BY-309-2, BY309-3, BY-309-4, BY-314-1 OTHER STATIONS - BY-01-1, BY-01-2, BY-04-11 BY-04-2, BY-06-1, BY-06-2, BY-21-1, BY-21-2, BY-22-1, BY-22-2, BY-23-1, BY-23-2, BY-24-1, BY-24-2 CONTROL STATIONS - BY-08-1, BY-08-2 C-20 71 of 207

FIGURE C-1 Surface Water - Gross Beta - Station BY-12 and BY-29 (C)

Collected in the Vicinity of BNGS, 2000 - 2004 BY-12 Oregon Pool of Rock River, Downstream I0.0 8.D L2 4.0 2.0 0i 01) 12-:+1-00 12-'11 1 12-31-02 12-31-03 12-30-a4 BY-29 (C) Byron, Upstream 14,0 --

12.0 +

10-0+

No sarnples; No samples; No samples:

8a.0 - river f*ozen. river frozen. river frozen.

G.C +

4.0o4 4 4 U.V4- I 014-. 1-00 12-31-00 12-31-01 12-31-02 12-3 j-0311,-c.4 72 of 207

FIGURE C-1 (cont.)

Surface Water - Gross Beta - Station BY-12 and BY-29 (C)

Collected in the Vicinity of BNGS, 2005 - 2009 BY-12 Oregon Pool of Rock River, Downstream 10.0 8.0 6.0

,-I C.

4.0 2.0 0.0 I 01-10-05 01-04-06 12-29-06 12-23-07 12-16-08 12-10-09 BY-29 (C) Byron, Upstream 10.0 T 8.0 6.0 +

C.)

~cVk 4.0 +

2.0 0.0 I I I I 01-10-05 01-04-06 12-29-06 12-23-07 12-16-08 12-10-09 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 73 of 207

FIGURE C-2 Surface Water - Tritium - Stations BY-12 and BY-29 (C)

Collected in the Vicinity of BNGS, 2000 - 2004 BY-12 Oregon Pool of Rock River, Downstream 3900-3500 31i 0 2700 2300

-J 1900 1100-700

-100 01 00 12-31-0*0 12-31-01 t2-31 -02 12-31t-03 12-39--D4.

BY-29(C) Byron, Upstream 500*

-400-10D 4-7\

0 /

-101 01-01-OD 12-31-00 12-31-01 12-31-02 12-31-03 1 2-30--04 74 of 207

FIGURE C-2 (cont.)

Surface Water - Tritium - Stations BY-12 and BY-29 (C)

Collected in the Vicinity of BNGS, 2005 - 2009 BY-12 Oregon Pool of Rock River, Downstream 3500 3000 2500

,J 2000 C.,

1500 1000 500 0

03-31-05 03-09-06 02-15-07 01-24-08 01-01-09 12-10-09 BY-29 (C) Byron, Upstream 250 -

200 4 150 +

C.

100 4 50 +

0! I I I I 03-31-05 03-09-06 02-15-07 01-24-08 01-01-09 12-10-09 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 75 of 207

FIGURE C-3 Ground Water - Tritium - Stations BY-14-1 and BY-18 Collected in the Vicinity of BNGS, 2000 - 2004 BY-14-1 3200 N. German Church Road 3wa 2Mo 1DO N \V/I \"

-100

-201]L 01-01-00) 12-31-M 11-11401 12-3142 12-31-03 BY-18 McCoy Farmstead Wall dOw -

I--, ý, / \ / / - I-- \/,! _-7N\/i\,\

.100 I-r-01,-Dl0 12-31-09 12.31.1 -12.31.02 1 2-3o-94 76 of 207

FIGURE C-3 (cont.)

Ground Water - Tritium - Stations BY-14-1 and BY-18 Collected in the Vicinity of BNGS, 2005 - 2009 BY-14-1 3200 N. German Church Road 250 200 150 0) 100 50 0

03-311-05 02-26-06 01-24-07 12-22-07 11-18-08 10-16-09 BY-18 McCoy Farmstead Well 250 200 150

-I c3 100 50 0

03-31I-05 02-26-06 01-24-07 12-22-07 11-18-08 10-16-09 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 77 of 207

FIGURE C-4 Ground Water - Tritium - Station BY-32 Collected in the Vicinity of BNGS, 2000 - 2004 BY-32 Wofford Well 500-400-300 +

200

/1 \

0]o

-, \

/

-100 ! I I I 01-01 -00 12°31°00 Q 01 123102 12-31_O)4 12-30~-04 78 of 207

FIGURE C-4 (cont.)

Ground Water - Tritium - Station BY-32 Collected in the Vicinity of BNGS, 2005 - 2009 BY-32 Wolford Well 250 -r 200 150

-J 100 +

50 +

013 I I I I I 03/31/05 02/26/06 01/24/07 12/22/07 11/18/08 10/16/09 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 79 of 207

FIGURE C-5 Ground Water - Tritium - Stations BY-35 and BY-36 Collected in the Vicinity of BNGS, 2006-2009 BY-35 250 T 200 4 150 a.

100 +

50 0 -

04-11-06 12-24-06 09-07-07 05-21-08 02-02-09 10-17-09 BY-36 250 -

200 150

-J

'30.

100 +

50 +

0 -

04-11-06 12-24-06 09-07-07 05-21-08 02-02-09 10-17-09 NEW STATIONS IN 2006 80 of 207

FIGURE C-6 Ground Water - Tritium - Stations BY-37 Collected in the Vicinity of BNGS, 2006-2009 BY-37 250 T 200 1 150*

U 100 +

50 +

0 I I I I 04-11-06 12-24-06 09-07-07 05-21-08 02-02-09 10-17-09 NEW STATION IN 2006 81 of 207

FIGURE C-7 Air Particulates - Gross Beta - Stations BY-08 (C) and BY-21 Collected in the Vicinity of BNGS, 2000 - 2004 BY-08 (C) Leaf River 10 5

1 4

2 0"1-00 12-31-00 12-31-41 12-41-01 BY-21 Byron Nea rsite N 0

6 4 j D101410O0 %21-00 "4 12-3142 12-31-03 12,3D0D4 82 of 207

FIGURE C-7 (cont.)

Air Particulates - Gross Beta - Stations BY-08 (C) and BY-21 Collected in the Vicinity of BNGS, 2005 - 2009 BY-08 (C) Leaf River 60.0 50.0 E 40.0 m

30.0 03 9M CL

,w 20.0 10.0 0.0 01-04-05 01-03-06 01-02-07 01-01-08 12-30-08 12-29-09 BY-21 Byron Nearsite N 60.0 50.0 40.0 m

03 30.0 CLl m

20.0 10.0 0.0 01-04-05 01-03-06 01-02-07 01-01-08 12-30-08 12-29-09 DUE TO VENDOR CHANGE IN 2005, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCI/M3 83 of 207

FIGURE C-8 Air Particulates - Gross Beta - Stations BY-22 and BY-23 Collected in the Vicinity of BNGS, 2000 - 2004 BY-22 Byron Nearsite ESE ID I

Ru 4

2-31m-O 12-31-01 12-31-02 12-31-03 "*- ,4 BY-23 Byron NearsiterS 10.0 X

4-G 210 01-Dl-00 12-3140 12,31,01 1M142 1,2ýl1-a 84 of 207

FIGURE C-8 (cont.)

Air Particulates - Gross Beta - Stations BY-22 and BY-23 Collected in the Vicinity of BNGS, 2005 - 2009 BY-22 Byron Nearsite ESE 60.0 50.0 40.0 m

CL Pi 30.0 C?

0.

uJ 20.0 10.0 0.0 01-04-05 01-03-06 01-02-07 01-01-08 12-30-08 12-29-09 BY-23 Byron Nearsite S 60.0 50.0 E 40.0 C.)

0.

30.0 03 w

C) 20.0 10.0 0.0 01-04-05 01-03-06 01-02-07 01-01-08 12-30-08 12-29-09 DUE TO VENDOR CHANGE IN 2005, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCI/M3 85 of 207

FIGURE C-9 Air Particulates - Gross Beta - Station BY-24 Collected in the Vicinity of BNGS, 2000 - 2004 BY-24 Byrom Nearsite SW 4.0]

2.4 86 of 207

FIGURE C-9 (cont.)

Air Particulates - Gross Beta - Station BY-24 Collected in the Vicinity of BNGS, 2005 - 2009 BY-24 Byron Nearsite SW 60.0 50.0 E 40.0 c*

c 30.0 9

o 20.0 10.0 0.0 01-04-05 01-03-06 01-02-07 01-01-08 12-30-08 12-29-09 DUE TO VENDOR CHANGE IN 2005, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCl/M3 87 of 207

FIGURE C-10 Air Particulates - Gross Beta - Stations BY-01 and BY-04 Collected in the Vicinity of BNGS, 2005.- 2009 BY-01 60.0 50.0 40.0 a.

C.)

30.0 9

uJ 5! 20.0 10.0 0.0 07-05-05 05-29-06 04-22-07 03-15-08 02-06-09 12-31-09 BY-04 60.0 50.0 E 40.0 a.

30.0 0

o, 0J 20.0 10.0 0.05-07-05-05 05-29-06 04-22-07 03-15-08 02-06-09 12-31-09 AIR PARTICULATE GROSS BETA ANALYSES OF FAR FIELD LOCATIONS STARTED IN JULY 2005 88 of 207

FIGURE C-11 Air Particulates - Gross Beta - Station BY-06 Collected in the Vicinity of BNGS, 2005 - 2009 BY-06 60.0 50.0 40.0 CL

0. 30.0 0'

20.0 10.0 0.0 07-05-05 05-29-06 04-22-07 03-15-08 02-06-09 12-31-09 AIR PARTICULATE GROSS BETA ANALYSES OF FAR FIELD LOCATIONS STARTED IN JULY 2005 89 of 207

APPENDIX D INTER-LABORATORY COMPARISON PROGRAM 90 of 207

Intentionally left blank 91 of 207

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2009 (PAGE 1 OF 3)

Identification Reported Known Ratio (c)

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

March 2009 E6533-396 Milk Sr-89 pCi/L 102 97.7 1.04 A Sr-90 pCi/L 14.9 15.6 0.96 A E6534-396 Milk 1-131 pCi/L 66.7 79.3 0.84 A Ce-141 pCi/L 87.5 94.9 0.92 A Cr-51 pCi/L 275 305 0.90 A Cs-134 pCi/L 82.0 93.7 0.88 A Cs-137 pCi/L ill ill 1.00 A Co-58 pCi/L 114 119 0.96 A Mn-54 pCi/L 136 128 1.06 A Fe-59 pCi/L 112 99.9 1.12 A Zn-65 pCi/L 160 156 1.03 A Co-60 pCi/L 142 142 1.00 A E6536-396 AP Ce-141 pCi 120 115 1.04 A Cr-51 pCi 385 371 1.04 A Cs- 134 pCi 113 114 0.99 A Cs-137 pCi 149 135 1.10 A Co-58 pCi 153 145 1.06 A Mn-54 pCi 155 155 1.00 A Fe-59 pCi 118 121 0.98 A Zn-65 pCi 195 189 1.03 A Co-60 pCi 190 173 1.10 A E6535-396 Charcoal 1-131 pCi 82.8 79.4 1.04 A June 2009 E6742-396 Milk Sr-89 pCi/L 107 112 0.96 A Sr-90 pCi/L 19.0 16.7 1.14 A E6743-396 Milk 1-131 pCi/L 98.1 102.0 0.96 A Ce-141 pCi/L 260 284 0.92 A Cr-51 pCi/L 389 400 0.97 A Cs-134 pCi/L 144.0 166 0.87 A Cs-137 pCi/L 185 192 0.96 A Co-58 pCi/L 86.9 91.9 0.95 A Mn-54 pCi/L 133 137 0.97 A Fe-59 pCi/L 126 122 1.03 A Zn-65 pCi/L 173 175 0.99 A Co-60 pCi/L 298 312 0.96 A E6745-396 AP Ce-141 pCi 186 163 1.14 A Cr-51 pCi 262 231 1.13 A Cs-134 pCi 101 95 1.06 A Cs-137 pCi 135 ill 1.22 W Co-58 pCi 61 53 1.16 A Mn-54 pCi 83.1 79 1.05 A Fe-59 pCi 84 70 1.19 A Zn-65 pCi 137 101 1.36 N (1)

Co-60 pCi 202 180 1.12 A E6744-396 Charcoal 1-131 pCi 92.2 95.8 0.96 A D-1 92 of 207

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2009 (PAGE 2 OF 3)

Identification Reported Known Ratio (c)

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

September 2009 E6897-396 Milk Sr-89 pCi/L 113 107 1.06 Sr-90 pCi/L 17.4 18.8 0.93 E6898-396 Milk 1-131 pCi/L 89.2 98.6 0.90 Ce-141 pCi/L 249 275 0.91 Cr-51 pCi/L 213 221 0.96 Cs- 134 pCi/L 104.0 123 0.85 Cs-1 37 pCi/L 172 185 0.93 Co-58 pCi/L 96.3 99.4 0.97 Mn-54 pCi/L 201 206 0.98 Fe-59 pCi/L 154 147 1.05 Zn-65 pCi/L 213 204 1.04 Co-60 pCi/L 154 160 0.96 E6900-396 AP Ce-141 pCi 181 161 1.12 Cr-51 pCi 145 130 1.12 Cs-I 34 pCi 71.8 72 0.99 Cs-1 37 pCi 115 109 1.06 Co-58 pCi 62 58 1.06 Mn-54 pCi 129 121 1.07 Fe-59 pCi 97 98 0.98 Zn-65 pCi 110 120 0.92 Co-60 pCi 98.7 94.1 1.05 E6899-396 Charcoal 1-131 pCi 89.5 92.3 0.97 December 2009 E6946-396 Milk Sr-89 pCi/L 131 131 1.00 A Sr-90 pCi/L 19.3 17.9 1.08 A E6947-396 Milk 1-131 pCi/L 79.2 87.3 0.91 A Ce-141 pCi/L 193 202 0.96 A Cr-51 pCi/L 512 548 0.93 A Cs-134 pCi/L 222 253 0.88 A Cs-137 pCi/L 163 179 0.91 A Co-58 pCi/L 200 211 0.95 A Mn-54 pCi/L 178 178 .1.00 A Fe-59 pCi/L 176 178 0.99 A Zn-65 pCi/L 326 345 0.94 A Co-60 pCi/L 240 256 0.94 A E6949-396 AP Ce-141 pCi 103 103 1.00 A Cr-51 pCi 290 280 1.04 A Cs-134 pCi 116 129 0.90 A Cs-137 pCi 93.4 91.5 1.02 A Co-58 pCi ill 108 1.03 A Mn-54 pCi 81.0 90.8 0.89 A Fe-59 pCi 106 90.8 1.17 A Zn-65 pCi 155 176 0.88 A Co-60 pCi 135 131 1.03 A D-2 93 of 207

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2009 (PAGE 3 OF 3)

Identification Reported Known Ratio (c)

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

December 2009 E6948-396 Charcoal 1-131 pCi 93.3 93.9 0.99 A (1) Detector 7 appearsto have a slightly high bias. Detector 7 was removed from service until it can be recalibrated. NCR 09-23 (a) Teledyne Brown Engineering reportedresult.

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

(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-Acceptable with warning. Reported result falls within 0. 70-0.80 or 1.20-1.30. N = Not Acceptable. Reported result falls outside the ratio limits of < 0. 70 and > 1.30.

D-3 94 of 207

TABLE D-2 ERA ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2009 (PAGE 1 OF 1)

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

April 2009 RAD 77 Water Sr-89 pCi/L 57.4 48.3 37.8 - 55.7 N (1)

Sr-90 pCi/L 30.6 31.4 22.9 - 36.4 A Ba-133 pCi/L 55.2 52.7 43.4 - 58.3 A Cs-134 pCi/L 65.8 72.9 59.5 - 80.2 A Cs-137 pCi/L 157 168 151 - 187 A Co-60 pCi/L 86.4 88.9 80.0- 100 A Zn-65 pCi/L 85.5 84.4 76.0- 101 A Gr-A pCi/L 47.7 54.2 28.3 - 67.7 A Gr-B pCi/L 45.2 43.5 29.1 - 50.8 A 1-131 pCi/L 25.2 26.1 21.7-30.8 A H-3 pCi/L 19733 20300 17800 - 22300 A October 2009 RAD 79 Water Sr-89 pCi/L 64.75 62.2 50.2-70.1 A Sr-90 pCi/L 30.30 30.7 22.4 - 35.6 A Ba-1 33 pCi/L 97.9 92.9 78.3- 102 A Cs-1 34 pCi/L 76.8 79.4 65.0 - 87.3 A Cs-137 pCi/L 59.9 54.6 49.1 -62.9 A Co-60 pCi/L 121 117 105- 131 A Zn-65 pCi/L 115 99.5 89.6- 119 A Gr-A pCi/L 19.6 23.2 11.6-31.1 A Gr-B pCi/L 28.5 26.0 16.2 - 33.9 A 1-131 pCi/L 22.1 22.2 18.4- 26.5 A H-3 pCi/L 16133 16400 14300 - 18000 A (1) Calculation did not allow for Y-90 ingrowth on the Sr-89 mount. NCR 09-14 (a) Teledyne Brown Engineering reported result.

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

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

D-4 95 of 207

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

TELEDYNE BROWN ENGINEERING, 2009 (PAGE 1 OF 2)

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

March 2009 09-MaW20 Water Cs-134 Bq/L 18.8 22.5 18.5-29.3 A Cs-137 Bq/L 0.0601 (1) A Co-57 Bq/L 17.0 18.9 13.2-24.6 A Co-60 Bq/L 16.1 17.21 12.05 - 22.37 A H-3 Bq/L 332 330.9 231.6 - 430.2 A Mn-54 Bq/L 13.8 14.7 10.26- 19.06 A Sr-90 Bq/L 6.88 7.21 5.05- 9.37 A Zn-65 Bq/L 13.2 13.6 9.5- 17.7 A 09-GrW2O Water Gr-A Bq/L 0.529 0.635 >0.0- 1.270 A Gr-B Bq/L 1.87 1.27 0.64-1.91 A 09-MaS20 Soil Cs-134 Bq/kg 433 467 327 - 607 A Cs-137 Bq/kg 649 605 424 - 787 A Co-57 Bq/kg -0.120 (1) A Co-60 Bq/kg 3.91 4.113 (2) A Mn-54 Bq/kg 339 307 215-399 A K-40 Bq/kg 644 570 399 - 741 A Sr-90 Bq/kg 245 257 180-334 A Zn-65 Bq/kg 272 242 169-315 A 09-RdF20 AP Cs-134 Bq/sample 2.77 2.93 2.05 - 3.81 A Cs-1 37 Bq/sample 1.41 1.52 1.06-1.98 A Co-57 Bq/sample 1.24 1.30 0.91 - 1.69 A Co-60 Bq/sample 1.33 1.22 0.85 - 1.59 A Mn-54 Bq/sample 2.42 2.2709 1.5898 - 2.9522 A Sr-90 Bq/sample 0.713 0.64 0.448 - 0.832 A Zn-65 Bq/sample 1.30 1.36 0.95 - 1.77 A 09-GrF20 AP Gr-A Bq/sample 0.188 0.348 >0.0 - 0.696 A Gr-B Bq/sample 0.313 0.279 0.140 - 0.419 A March 2009 09-RdV20 Vegetation Cs-134 Bq/sample 3.48 3.40 2.38 - 4.42 A Cs-137 Bq/sample 1.15 0.93 0.65- 1.21 W Co-57 Bq/sample 3.12 2.36 1.65 - 3.07 N (3)

Co-60 Bq/sample -0.0105 (1) A Mn-54 Bq/sample 2.98 2.3 1.61 -2.99 W K-40 Bq/sample 64.1 (4)

Sr-90 Bq/sample 1.09 1.260 0.882 - 1.638 A Zn-65 Bq/sample 1.73 1.3540 0.948 - 1.760 W September 2009 09-MaW21 Water Cs-1 34 Bq/L 26.5 32.2 22.5 -41.9 A Cs-1 37 Bq/L 37.2 41.2 28.8 - 53.6 A Co-57 Bq/L 32.2 36.6 25.6 - 47.6 A Co-60 Bq/L 14.0 15.40 10.8 -20.0 A H-3 Bq/L 705 634.1 443.9 - 824.3 A Mn-54 Bq/L -0.1015 (1) A Sr-90 Bq/L 13.9 12.99 9.09- 16.89 A Zn-65 Bq/L 26.2 26.9 18.8-35.0 A 09-GrW21 Water Gr-A Bq/L 1.27 1.047 >0.0 - 2.094 A Gr-B Bq/L 9.70 7.53 3.77-11.30 A D-5 96 of 207

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

TELEDYNE BROWN ENGINEERING, 2009 (PAGE 2 OF 2)

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

September 2009 09-MaS21 Soil Am-241 Bq/kg 74.7 89.8 62.9-116.7 A Cs-1 34 Bq/kg 0.554 (1) A Cs-137 Bq/kg 706 669 468-870 A Co-57 Bq/kg 606 586 410-762 A Co-60 Bq/kg 350 327.000 229-425 A Mn-54 Bq/kg 876 796 557-1035 A K-40 Bq/kg 425 375 263-488 A Sr-90 Bq/kg 505 455 319-592 A Zn-65 Bq/kg 1370 1178 825-1531 A 09-RdF21 AP Cs-1 34 Bq/sample -0.02 (1) A Cs-1 37 Bq/sample 1.4 1.4 0.98 - 1.82 A Co-57 Bq/sample 5.98 6.48 4.54 - 8.42 A Co-60 Bq/sample 1.01 1.03 0.72 - 1.34 A Mn-54 Bq/sample 5.16 5.49 3.84-7.14 A Sr-90 Bq/sample 0.925 0.0835 0.585 - 1.086 A Zn-65 Bq/sample 4.39 3.93 2.75-5.11 A 09-GrF21 AP Gr-A Bq/sample 0.357 0.659 >0.0 - 1.318 A Gr-B Bq/sample 1.403 1.320 0.66 - 1.98 A 09-RdV21 Vegetation Cs-1 34 Bq/sample -0.0027 (1) A Cs-1 37 Bq/sample 2.36 2.43 1.70-3.16 A Co-60 Bq/sample 2.58 2.57 1.80 - 3.34 A Mn-54 Bq/sample 8.36 7.9 5.5- 10.3 A K-40 Bq/sample 57.8 (4)

Sr-90 Bq/sample 1.73 1.78 1.25-2.31 A Zn-65 Bq/sample -0.59 (1) A (1) False positive test.

(2) Sensativity evaluation.

(3) Homogeniety problem. MAPEP requires using entire sample but due to geometry limitations we can only use part of the sample. NCR 09-13 (4) Not evaluated by MAPEP.

(a) Teledyne Brown Engineering reportedresult.

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

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

D-6 97 of 207

APPENDIX E EFFLUENT REPORT 98 of 207

Intentionally left blank 99 of 207

TABLE OF CONTENTS INT R O D UCT IO N ................................................................................................................. 1 S UMMA R Y ........................................................................................................................... 2 1.0. EFFLUENTS ................................................ 3 1.1. Gaseous Effluents to the Atmosphere ............................................. 3 1.2. Liquids Released to Rock River ........................................................ 3 2.0. SOLID RADIOACTIVE WASTE ................................................................... 3 3.0. DO SE TO MA N............................................................................................ 4 3.1. Gaseous Effluent Pathways ............................................................ 4 3.1.1. Noble G ases ........................................................................ 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 ............................................................... 5 3.1.2.1. Dose to Thyroid .................................................... 5 3.2. Liquid Effluent Pathways ................................................................... 5 3.3. Assessment of Dose to Member of Public ........................................ 6 4.0. S ITE MET EO R O LO G Y ................................................................ .................... 6 100 of 207

Table of Contents (cont.)

APPENDIX E-1 DATA TABLES AND FIGURES ............................................................. E-1.1 Station Releases Table 1.1-1 G aseous Effluents .................................................................... E-1.2 Table 1.2-1 Liquid Effluents ......................................................................... E -1.3 Table 3.1-1 Maximum Doses Resulting from Airborne Releases ................ E-1.4 Table 3.2-1 Maximum Doses Resulting from Liquid Discharges ................. E-1.8 Table 3.4-1 Maximum Doses Resulting from Airborne Releases Based On Concurrent Meteorological Data ......................................... E-1.12 ii*

101 of 207

INTRODUCTION Liquid effluents from Byron Station are released to the Rock 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 weekly grab samples and grab samples of batch releases prior to the release of noble gases as well as continuously collected composite samples of iodine and particulate radioactivity 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 isotopic composition of effluents and meteorological data.

Environmental monitoring is conducted by sampling at indicator and control (background) locations in the vicinity of Byron Station to measure changes in radiation or radioactivity levels that may be attributable to station operation. If significant changes attributable to Byron Station are measured, these changes are correlated with effluent releases. External gamma radiation exposure from noble gases and internal dose from 1-131 in milk are the critical pathways at this site; however, an environmental monitoring program is conducted which also includes other pathways.

102 of 207

SUMMARY

Calculations based on gaseous and liquid effluents, Rock River flow and meteorological data indicate that public dose due to radioactive material attributable to Byron 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 Byron Station calculated for the maximum-exposed individual for the period is 3.09E-01 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 40CFR190.

There were no additional operational controls implemented which affected the areas of radiological effluents in 2009.

There were no measurements which exceeded the reporting levels, including any which would not have been attributable to station effluents.

The results of the current radiological environmental monitoring program are approximately the same as those found during the pre-operational studies conducted at Byron Station.

103 of 207

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

A total of 1.20E+01 curies of fission and activation gases were released with a maximum average quarterly release rate of 1.33E+00 pCi/sec.

A total of 1.01 E-04 curies of 1-131 were released during the year with a maximum average quarterly release rate of 6.41 E-06 pCi/sec.

A total of 1.51 E-05 curies were released as airborne particulate matter with a maximum average quarterly release rate of 1.12E-06 pCi/sec. Alpha-emitting radionuclides were below detectable limits.

A total of 0.OOE+00 curies of other radioisotopes were released with a maximum average quarterly release rate of 0.OOE+00 pCi/sec.

A total of 1.05E+02 curies of tritium were released with a maximum average quarterly release rate of 2.60E+00 pCi/sec.

1.2 Liquids Released to Rock River A total of 2.76E+10 liters of radioactive liquid wastes (prior to dilution) containing 2.10E-02 curies (excluding tritium, noble gases and alpha) were discharged from the station. These wastes were released at a maximum quarterly average concentration of 1.01 E-09 pCi/ml. A total of 1.81 E+03 curies of tritium were released. Quarterly release totals of principal radionuclides in liquid effluents are given in Table 1.2-1.

2.0 SOLID RADIOACTIVE WASTE Solid radioactive wastes were shipped by truck. For detail, refer to Byron Station 2009 Effluent Report.

104 of 207

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 whole body dose rates are shown in Table 3.1-1 and were calculated based on measured release rates, isotopic composition of the noble gases, and average meteorological data for the period. Dose rates based on concurrent meteorological data are shown in Table 3.4-1. Based on measured effluents and average meteorological data, the maximum total body dose to an individual would be 1.73E-02 mrem for the year (Table 3.1-1), with an occupancy or shielding factor of 0.7 included. The maximum total body dose based on measured effluents and concurrent meteorological data would be 9.72E-06 mrem (Table 3.4-1). The maximum gamma air dose was 1.64E-04 mrad (Table 3.1-1) based on measured effluents and average meteorological data, and 1.93E-05 mrad based on concurrent meteorological data (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 "semi-infinite" for purpose of calculating the dose from beta radiation incident on the skin. However, the actual dose to sensitive skin tissues is difficult to calculate due to the effect of the beta particle energies, thickness of inert skin and clothing covering sensitive tissues. For purposes of this report the skin is taken to have a thickness of 7.0 mg/cm2 and an occupancy factor 105 of 207

of 1.0 is used. The skin dose based on concurrent meteorological data for the year was 2.52E-04 mrem (Table 3.4-1)

The maximum offsite beta air dose for the year, based on measured effluents and average meteorological data, was 6.36E-04 mrad (Table 3.1-1). The beta air dose based on concurrent meteorological data was 4.52E-04 mrad (Table 3.4-1).

3.1.2 Radioactive Iodine The human thyroid exhibits a significant capacity to concentrate ingested or inhaled iodine. The minimal levels of radioiodine, 1-131, released during routine operation of the station, may be made available to man resulting in a dose to the thyroid. The principal pathway of interest for this radionuclide is ingestion of radioiodine in milk. Calculations made for 2009 and previous years indicate that contributions to doses from inhalation of 1-131 and 1-133 and ingestion of 1-133 in milk are negligible.

3.1.2.1 Dose to Thyroid The hypothetical thyroid dose to the maximum exposed individual living near the station via ingestion of milk was calculated. The radionuclide considered was 1-131 and the source of milk was taken to be the nearest dairy farm with the cows pastured from May through October. The maximum thyroid dose was 7.1OE-02 mrem during the year (Table 3.1-1 [infant]).

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 106 of 207

Manual. The maximum whole body dose for the year was 2.92E-01 mrem (adult) and no organ dose exceeded 3.60E-01 mrem (Table 3.2-1 [adult]).

3.3 Assessment of Dose to Member of Public During the period January to December 2009, Byron Station did not exceed the limits below as shown in Table 3.1-1 and Table 3.2-1 (based on yearly average meteorological data), and Table 3.4-1 (based on concurrent meteorological data):

The RETS limits on dose or dose commitment to a member of the public 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 quarter; 3 mrem to the whole body or 10 mrem to any organ during the calendar year).

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

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

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

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 250' level and wind speed class by atmospheric stability class determined from the temperature difference between the 250' and 30' levels. Data recovery for all measurements on the tower as 99.8% during 2009 (Table 3.4-1).

107 of 207

Intentionally left blank 108 of 207

APPENDIX E-1 DATA TABLES AND FIGURES 109 of 207

Intentionally left blank 110 of 207

Table 1.1-1 Byron Station Unit One 2009 EFFLUENT AND WASTE DISPOSAL REPORT TABLE 1A GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES Reg Guide 1.21 - Unit 1 2009 REPORT FOR 2009 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases

1. Total Release Ci 2.67E-01 2.28E-01 3.63E-01 1.06E+01 1.14E+01

2. Avg. Release Rate uCi/sec 3.39E-02 2.89E-02 4.61E-02 1.33E+00 3.62E-01 Iodine-131

1. Total Release Ci 0.00E+00 0.OOE+00 6.99E-06 5.96E-06 1.29E-05

2. Avg. Release Rate uCi/sec 0.00E+00 0.00E+00 8.86E-07 7.56E-07 4.10E-07 Particulates Half Life >= 8 days

1. Total Release Ci 0.OOE+00 4.56E-06 8.85E-06 0.OOE+00 1.34E-05

2. Avg. Release Rate uCi/sec 0.00E+00 5.78E-07 1.12E-06 0.00E+00 4.25E-07 Tritium

1. Total Release Ci 2.60E+00 3.11E+01 1.16E+01 7.74E+00 5.31E+01

2. Avg. Release Rate uCi/sec 3.29E-01 3.95E+00 1.47E+00 9.82E-01 1.68E+00 Gross Alpha

1. Total Release Ci 0.OOE+00 0.00E+00 0.OOE+00 0.OOE+00 0.00E+00

2. Avg. Release Rate uCi/sec 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 0.00E+00 Byron Station Unit Two 2009 EFFLUENT AND WASTE DISPOSAL REPORT TABLE 1A GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES Reg Guide 1.21 - Unit 2 REPORT FOR 2009 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases

1. Total Release Ci 1.57E-01 1.30E-01 2.33E-02 1.07E-02 6.27E-01

2. Avg. Release Rate uCi/sec 1.99E-02 1.65E-02 2.96E-02 1.36E-02 1.99E-02 Iodine-131

1. Total Release. Ci 0.OOE+00 0.OOE+00 3.80E-05 5.05E-05 8.85E-05

2. Avg. Release Rate uCi/sec 0.OOE+/-00 0.OOE+00 4.81E-06 6.41E-06 2.81E-06 Particulates Half Life >= 8 days

1. Total Release Ci 0.OOE+00 0.OOE+00 6.86E-07 9.77E-07 1.66E-06

2. Avg. Release Rate uCi/sec 0.OOE+00 0.OOE+00 8.71E-08 1.24E-07 5.27E-08 Tritium

1. Total Release Ci 9.13E+00 5.94E+00 2.05E+01 1.61E+01 5.16E+01

2. Avg. Release Rate uCi/sec 1.16E+00 7.53E-01 2.60E+00 2.04E+00 1.64E+00 Gross Alpha

1. Total Release Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.00E+00

2. Avg. Release Rate uCi/sec 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 E-1.1 111 of 207

Table 1.2-1 Byron Station Unit One 2009 EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2A LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES Reg Guide 1.21 - Unit 1 2009 REPORT FOR 2009 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Products

1. Total Release Ci 3.35E-03 2.64E-03 2.32E-03 2.77E-03 1.05E-02

2. Avg. Diluted Conc. uCi/ml 1.01E-09 7.41E-10 6.49E-10 8.38E-10 7.61E-10 Tritium

1. Total Release Ci 1.63E+02 2.12E+02 4.14E+02 1.18E+02 9.07E+02

2. Avg. Diluted Conc. uCi/ml 4.92E-05 5.96E-05 1.16E-04 3.56E-05 6.59E-05 Dissolved and Entrained Gases

1. Total Release Ci 3.54E-03 4.88E-06 1.64E-03 0.OOE+00 5.18E-03

2. Avg. Diluted Conc. uCi/ml 1.07E-09 1.37E-12 4.58E-10 0.OOE+00 3.76E-10 Gross Alpha Radioactivity

1. Total Release Ci 0.00E+00 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 Volume of liquid waste liters 3. 32E+09 3. 56E+09 3.58E+09 3. 30E+09 1.38E+10 Volume of dil. water liters 0 . OOE+00 0 . 00E+00 0. 00E+00 0 .OOE+00 0 . OOE+00 Byron Station Unit Two 2009 EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2A LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES Reg Guide 1.21 - Unit 2 2009 REPORT FOR 2009 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Products

1. Total Release Ci 3. 35E-03 2. 64E-03 2. 32E-03 2. 77E-03 1 . 05E-02

2. Avg. Diluted Conc. uCi/ml 1.01E-09 7.41E-10 6.49E-10 8. 38E-10 7. 61E-10 Tritium

1. Total Release Ci 1.63E+02 2.12E+02 4.14E+02 1.18E+02 9.07E+02

2. Avg. Diluted Conc. uCi/ml 4.92E-05 5.96E-05 1.16E-04 3.56E-05 6.59E-05 Dissolved and Entrained Gases

1. Total Release Ci 3.54E-03 4.88E-06 1.64E-03 0.OOE+00 5.18E-03

2. Avg. Diluted Conc. uCi/ml 1.07E-09 1.37E-12 4.58E-10 0.OOE+00 3.76E-10 Gross Alpha Radioactivity

1. Total Release Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 Volume of liquid waste liters 3.32E+09 3. 56E+09 3. 58E+09 3.30E+09 1.38E+10 Volume of dil. water liters 0 . 00E+00 0. OOE+00 0. OOE+00 0.OOE+00 0. OOE+00 E-1.2 112 of 207

Table 3.1-1 Byron Station Unit One 2009 40CFR190 URANIUM FUEL CYCLE DOSE REPORT GASEOUS DOSE

SUMMARY

Unit 1 2009 Report for: 2009 Unit Range - From: 1 To: 1 I&P DOSE LIMIT ANALYSIS ANNUAL 2009 Age Dose Limit Max % of Annual - Limit Group Organ (mrem) (mrem) Limit 2009 - Admin. Any Organ INFANT THYROID 3.55E-02 1.13E+01 3. 15E-01 2009 - Admin. Total Body CHILD TBODY 8.67E-03 1.05E+01 8.25E-02 2009 - T.Spc. Any Organ INFANT THYROID 3.55E-02 1.50E+01 2.37E-01 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Critical Pathway: Grs/Goat/Milk (GMILK)

Major Contributors ( 0% or greater to total)

Nuclide Percentage H-3 1. 90E+01 CR-51 6.50E-06 CO-58 1.lIE-04 1-131 7.90E+01 1-132 3.13E-03 1-133 2.05E+00 CS-136 4.02E-05 TE-123M 0.OOE+00 2009 - T.Spc. Total Body CHILD TBO DY 8.671E-03 1.50E+01 5.78E-02 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compas s Point: NA Critical Pathway: Vegetation (VEG)

Major Contributors ( 0% or greater to total)

Nuclide Percentage H-3 9. 97E+01 CR-51 2.73E-05 CO-58 7.99E-04 1-131 2.44E-01 1-132 8.75E-04 1-133 8.84E-03 CS-136 8.23E-03 TE-123M 0.OOE+00 E-1.3 113 of 207

40CFR190 URANIUM FUEL CYCLE DOSE REPORT GASEOUS DOSE

SUMMARY

2009 Unit 1 Report for: 2009 Unit Range - From: 1 To: 1 NG DOSE LIMIT ANALYSIS ANNUAL 2009 Dose Limit Max % of Annual - Limit (mrad) (mrad). Limit 2009 - Admin. Gamma 8.18E-05 7.50E+00 1. 09E-03 2009 - Admin. Beta 3.18E-04 1.50E+01 2 .12E-03 2009 - T.Spc. Gamma 8.181E-05 1.OOE+01 8.18E-04 Receptor: 4 Composite Crit. Receptor - NG Distance: 0.00 (meters) Compass Point: NA Nuclide Percentage AR-41 4.l1E+01 KR-85 1.28E+01 XE-138 2.76E+00 KR-85M 3.03E-02 XE-135 6.92E+00 XE-133M 1.35E-01 XE-131M 1.23E-01 XE-133 3.62E+01 2009 - T.Spc. Beta 3.181E-04 2.OOE+01 1.59E-03 Receptor: 4 Composite Crit. Receptor - NG Distance: 0.00 (meters) Compass Point: NA Nuclide Percentage AR-41 9.16E-01 KR-85 9.15E+01 XE-138 9.OOE-02 KR-85M 3.07E-03 XE-135 5.61E-01 XE-133M 3.85E-02 XE-131M 5.55E-02 XE-133 6.80E+00 E-1.4 114 of 207

40CFR190 URANIUM FUEL CYCLE DOSE REPORT 2009 Unit 1 Report for: 2009 Unit Range - From: 1 To: 1 MAXIMUM DOSE ANALYSIS ANNUAL 2009 Age Dose Dose Type Group Organ (mreim)

Any Organ ADULT GILLI 1.85]E-01 Liquid Receptor: 0 Liquid Receptor Gaseous Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Liquid Dose: 1.80E-01 % of Total: 9.71E+01 Critical Pathway: Fresh Water Fish - Sport (FFSP)

Major Contributors 0% or greater to total)

Nuclide Percentage H-3 7.93E+01 MN-54 3.25E-01 CO-58 7 .03E+00 CO-60 3.85E+00 NB-95 1.09E+00 AG-IIOM 4. 65E-03 TE-125M 8.42E+00 1-131 4.10E-05 CS-137 1 .35E-02 Gaseous Dose: 5.25E-03 % of Total: 2.84E+00 Critical Pathway: Vegetation (VEG)

Major Contributors 0% or greater to total)

Nuclide Percentage H-3 9.99E+01 CR-51 2.44E-04 CO-58 2.94E-03 1-131 6.87E-02 1-132 1.27E-03 1-133 1.29E-02 CS-136 1.17E-03 TE-123M 0.OOE+00 MAXIMUM DOSE ANALYSIS ANNUAL 2009 Age Dose Dose Type Group Organ (mrem)

Total Body ADULT TBODY 1.51E-01 Liquid Receptor: 0 Liquid Receptor Gaseous Receptor: 5 Composite Crit. Re ceptor - IP Distance: 0.00 (meters) Compass Point : NA

-E-1.5 115 of 207

40CFR190 URANIUM FUEL CYCLE DOSE REPORT Liquid Dose: 1.46E-01 % of Total: 9.67E+01 Critical Pathway: Fresh Water Fish - Sport (FFSP)

Major Contributors 0% or greater to total)

Nuclide Percentage H-3 9.76E+01 MN-54 2.49E-02 CO-58 9.58E-01 CO-60 5.57E-01 NB-95 1.18E-04 AG-1IOM 8.33E-06 TE-125M 3.48E-01 1-131 1.10E-04 CS-137 5.63E-01 Gaseous Dose: 5.26E-03 % of Total: 3.48E+00 Critical Pathway: Vegetation (VEG)

Major Contributors 0% or greater to total)

Nuclide Percentage H-3 9.98E+01 CR-51 4.36E-05 CO-58 9.88E-04 1-131 1.45E-01 1-132 1.36E-03 1-133 5.53E-03 CS-136 5.96E-03 TE-123M 0.O0E+00 E-1.6 116 of 207

Table 3.1-1 (cont.)

Byron Station Unit Two 2009 40CFR190 URANIUM FUEL CYCLE DOSE REPORT GASEOUS DOSE

SUMMARY

Unit 2 2009 Report for: 2009 Unit Range - From: 2 To: 2 I&P DOSE LIMIT ANALYSIS-------- AlNNUAL 2009 Age Dose Limit Max % of Annual - Limit Group Organ (mrem) (mrem) Limit 2009 - Admin. Any Organ INFANT THYROID 3.55E-02 1.13E+01 3.15E-01 2009 - Admin. Total Body CHILD TBODY 8.67E-03 1.05E+01 8.25E-02 2009 - T.Spc. Any Organ INFANT THYROID 3.55E-02 1.50E+01 2. 37E-01 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Critical Pathway: Grs/Goat/Milk (GMILK)

Major Contributors ( 0% or greater to total)

Nuclide Percentage H-3 1.90E+01 CR-51 6.50E-06 CO-58 1.lE-04 1-131 7.90E+01 1-132 3.13E-03 1-133 2.05E+00 CS-136 4.02E-05 TE-123M 0.OOE+00 2009 - T.Spc. Total Body CHILD TBO DY 8.671E-03 1.50E+01 5.78E-02 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compas s Point: NA Critical Pathway: Vegetation (VEG)

Major Contributors ( 0% or greater to total)

Nuclide Percentage H-3 9. 97E+01 CR-51 2 . 73E-05 CO-58 7. 99E-04 1-131 2.44E-01 1-132 8.75E-04 1-133 8.84E-03 CS-136 8. 23E-03 TE-123M 0. OOE+00 E-1.7 117 of 207

40CFR190 URANIUM FUEL CYCLE DOSE REPORT GASEOUS DOSE

SUMMARY

2009 Unit 2 Report for: 2009 Unit Range - From: 2 To: 2 NG DOSE LIMIT ANALYSIS ANNUAL 2009 Dose Limit Max % of Annual - Limit (mrad) (mrad) Limit 2009 - Admin. Gamma 8.18E-05 7.50E+00 1.09E-03 2009 - Admin. Beta 3.18E-04 1.50E+01 2 .12E-03 2009 - T.Spc. Gamma 8.18E-05 1.00E+01 8.18E-04 Receptor: 4 Composite Crit. Receptor - NG Distance: 0.00 (meters) Compass Point: NA Nuclide Percentage AR-41 4.11E+01 KR-85 1.28E+01 XE-138 2.76E+00 KR-85M 3.03E-02 XE-135 6.92E+00 XE-133M 1.35E-01 XE-131M 1.23E-01 XE-133 3.62E+01 2009 - T.Spc. Beta 3.18E-04 2.OOE+01 1.59E-03 Receptor: 4 Composite Crit. Receptor - NG Distance: 0.00 (meters) Compass Point: NA Nuclide Percentage AR-41 9. 16E-01 KR-85 9. 15E+01 XE-138 9. OOE-02 KR-85M 3. 07E-03 XE-135 5. 61E-01 XE-133M 3.85E-02 XE-131M 5. 55E-02 XE-133 6.80E+00 E-1.8 118 of 207

40CFR190 URANIUM FUEL CYCLE DOSE REPORT 2009 Unit 2 Report for: 2009 Unit Range - From: 2 To: 2 MAXIMUM DOSE ANALYSIS AlNNUAL 2009 Age Dose Dose Type Group Organ (mreim)

Any Organ ADULT GILLI 1.851E-OI Liquid Receptor: 0 Liquid Receptor Gaseous Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Liquid Dose: 1.80E-01 % of Total: 9.71E+01 Critical Pathway: Fresh Water Fish - Sport (FFSP)

Major Contributors 0% or greater to total)

Nuclide Percentage H-3 7. 93E+01 MN-54 3.25E-01 CO-58 7. 03E+00 CO-60 3. 85E+00 NB-95 1. 09E+00 AG-lIOM 4 .65E-03 TE-125M 8 .42E+00 1-131 4.10E-05 CS-137 1.35E-02 Gaseous Dose: 5.25E-03 % of Total: 2.84E+00 Critical Pathway: Vegetation (VEG)

Major Contributors 0% or greater to total)

Nuclide Percentage H-3 9.99E+01 CR-51 2.44E-04 CO-58 2.94E-03 1-131 6.87E-02 1-132 1.27E-03 1-133 1.29E-02 CS-136 1.17E-03 TE-123M 0.OOE+00 MAXIMUM DOSE ANALYSIS -------------- ANNUAL 2009 Age Dose Dose Type Group Organ (mrem)

Total Body ADULT TBODY 1.51E-01 Liquid Receptor: 0 Liquid Receptor Gaseous Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA E-1.9 119 of 207

40CFR190 URANIUM FUEL CYCLE DOSE REPORT Liquid Dose: 1.46E-01 % of Total: 9.67E+01 Critical Pathway: Fresh Water Fish - Sport (FFSP)

Major Contributors 0% or greater to total)

Nuclide Percentage H-3 9.76E+01 MN-54 2. 49E-02 CO-58 9.58E-01 CO-60 5 .57E-01 NB-95 1.18E-04 AG-1IOM 8 .33E-06 TE-125M 3.48E-01 1-131 1.10E-04 CS-137 5.63E-01 Gaseous Dose: 5.26E-03 % of Total: 3.48E+00 Critical Pathway: Vegetation (VEG)

Major Contributors 0% or greater to total)

Nuclide Percentage H-3 9.98E+01 CR-51 4.36E-05 CO-58 9.88E-04 1-131 1.45E-01 1-132 1.36E-03 1-133 5 .53E-03 CS-136 5.96E-03 TE-123M 0.00E+00 E-1.10 120 of 207

Table 3.2-1 (cont.)

Byron Station Unit One 2009 40CFRT90 URANIUM FUEL CYCLE DOSE REPORT LIQUID DOSE

SUMMARY

Unit 1 2009 Report for: 2009 Unit Range - From: 1 To: 1 Liquid Receptor

=== PERIOD DOSE BY ORGAN AND AGE GROUP (mrem) ANNUAL 2009 Agegrp Bone Liver Thyroid Kidney Lung GI-LLI Skin TB ADULT 4.70E-03 1.46E-01 1.44E-01 1.58E-01 1.43E-01 1.80E-01 0.OOE+00 1.46E-01 TEEN 5.11E-03 1.lIE-01 1.08E-01 1.07E-01 1.07E-01 1.34E-01 0.OOE+00 1.10E-01 CHILD 6.54E-03 1.23E-01 1.21E-01 1.19E-01 1.19E-01 1.29E-01 0.OOE+00 1.22E-01 INFANT 1.34E-05 5.27E-02 5.27E-02 5.27E-02 5.27E-02 5.27E-02 0.OOE+00 5.27E-02 SITE DOSE LIMIT ANALYSIS ----- ANNUAL 2009 Age Dose Limit Max % of Annual - Limit Group Organ (mrem) (mrem) Limit 2009 - Admin. Any Organ ADULT GILLI 1.80E-01 7.50E+00 2.40E+00 2009 - Admin. Total Body ADULT TBODY 1.46E-01 2.25E+00 6. 49E+00 2009 - T.Spc. Any Organ ADULT GILLI 1.80E-01 1.OOE+01 1.80E+00 Critical Pathway: Fresh Water Fish -. Sport (FFSP)

Major Contributors ( 0% or greater to total)

Nuclide Percentage H-3 7.93E+01 MN-54 3.25E-01 CO-58 7.03E+00 CO-60 3.85E+00 NB-95 1.09E+00 AG-11OM 4.65E-03 TE-125M 8.42E+00 1-131 4.10E-05 CS-137 1.35E-02 2009 - T.Spc. Total Body ADULT TBODY 1.46E-01 3.OOE+00 4.87E+00 Critical Pathway: Fresh Water Fish.- Sport (FFSP)

Major Contributors (0% or greater to total)

Nuclide Percentage H-3 9.76E+01 MN-54 2.49E-02 CO-58 9.58E-01 CO-60 5.57E-01 NB-95 1.18E-04 AG-11OM 8.33E-06 TE-125M 3.48E-01 1-131 1.10E-04 CS-137 5.63E-01 E-I.11 121 of 207

Table 3.2-1 (cont.)

Byron Station Unit Two 2009 40CFR190 URANIUM FUEL CYCLE DOSE REPORT LIQUID DOSE

SUMMARY

Unit 2 2009 Report for: 2009 Unit Range - From: 2 To: 2 Liquid Receptor PERIOD DOSE BY ORGAN AND AGE GROUP (mrem)-------- ANNUAL 2009 Agegrp Bone Liver Thyroid Kidney Lung GI-LLI Skin TB ADULT 4.70E-03 1.46E-01 1.44E-01 1.58E-01 1.43E-01 1.80E-01 0.OOE+00 1.46E-01 TEEN 5.11E-03 1.lIE-01 1.08E-01 1.07E-01 1.07E-01 1.34E-01 0.00E+00 1.10E-01 CHILD 6.54E-03 1.23E-01 1.21E-01 1.19E-01 1.19E-01 1.29E-01 0.OOE+00 1.22E-01 INFANT 1.34E-05 5.27E-02 5.27E-02 5.27E-02 5.27E-02 5.27E-02 0.OOE+00 5.27E-02 SITE DOSE LIMIT ANALYSIS-------- ANNUAL 2009 Ag e Dose Limit Max % of Annual - Limit Gr oup Organ (mrem) (mrem) Limit 2009 - Admin. Any Organ ADiULT GILLI 1.80E-01 7.50E+00 2.40E+00 2009 - Admin. Total Body ADIULT TBODY 1.46E-01 2.25E+00 6.49E+00 2009 - T.Spc. Any Organ ADULT GILLI 1.80E-01 1.OOE+01 1.80E+00 Critical Pathway: Fresh Water Fish - Sport (FFSP)

Major Contributors ( 0% or greater to total)

Nuclide Percentage H-3 7.93E+01 MN-54 3.25E-01 CO-58 7.03E+00 CO-60 3.85E+00 NB-95 1.09E+00 AG-11OM 4.65E-03 TE-125M 8.42E+00 1-131 4.10E-05 CS-137 1.35E-02 2009 - T.Spc. Total Body ADULT TBODY 1.46E-01 3.OOE+00 4.87E+00 Critical Pathway: Fresh Water Fish - Sport (FFSP)

Major Contributors ( 0% or greater to total)

Nuclide Percentage H-3 9.76E+01 MN-54 2.49E-02 CO-58 9.58E-01 CO-60 5.57E-01 NB-95 1.18E-04 AG-11OM 8.33E-06 TE-125M 3.48E-01 1-131 1.10E-04 CS-137 5.63E-01 E-1. 12 122 of 207

Table 3.4-1 Byron Station - Unit I MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES 2009 TYPE OF DOSE FIRST QUARTER SECOND QUARTER THIRD QUARTER FOURTH QUARTER ANNUAL GAMMA AIR (mrad) 1.390E-06(SSE) 2.OOOE-06( SE) 4.630E-06 W) 4.020E-06( W) 1.076E-05( W)

BETA AIR (mrad) 7.210E-06(SSE) 6.460E-06(ESE) 1. 580E-05 SE) 4.090E-04( W) 4.261E-04( W)

WHOLE BODY (mrem) 6.620E-07( SE) 1.050E-06( SE) 2.400E-06 SE) 7.190E-07( S) 4.828E-06( SE)

SKIN (mrem) 2.870E-06(SSE) 3.210E-06( SE) 8. 860E-06 SE) 2.300E-04(WNW) 2.375E-04(WNW)

ORGAN (mrem) 4.250E-05(SSE) 5.050E-04(ESE) 2. 770E-04 SE) 1.000E-04( W) 8.097E-04(ESE)

CRITICAL PERSON Teenager Teenager Teenager Teenager Teenager CRITICAL ORGAN Liver Liver Thyroid Thyroid Thyroid COMPLIANCE STATUS 10 CFR 50 APP. I 10 CFR 50 APP.I TYPE OF DOSE QUARTERLY OBJECTIVE % OF APP. I YEARLY OBJECTIVE % OF APP. I GAMMA AIR (mrad) 5.0 0.00 10.0 0.00 BETA AIR (mrad) 10.0 0.00 20.0 0.00 WHOLE BODY (mrem) 2.5 0.00 5.0 0.00 SKIN (mrem) 7.5 0.00 15.0 0.00 ORGAN (mrem) 7.5 0.01 15.0 0.01 CRITICAL PERSON Teenager Teenager CRITICAL ORGAN Liver Thyroid Calculation used release data from the following:

Unit 1 - Vent Date of calculation: 2/19/2010 Data Recovery 99.8%

(priority parameters)

E-1. 13 123 of 207

Table 3.4-1 Byron Station - Unit 2 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES 2009 TYPE OF DOSE FIRST QUARTER SECOND QUARTER THIRD QUARTER FOURTH QUARTER ANNUAL GAMMA AIR (mrad) 1.670E-06 SSE) 9.370E-07( SE) 2 .750E-06) W) 4.100E-06( W) 8.559E-06)(ESE)

BETA AIR (mrad) 4.940E-06(SSE) 3.570E-06(ESE) 1. 040E-05 SE) 1.310E-05( W) 2.564E-05(ESE)

WHOLE BODY (mrem) 8.530E-07( SE) 4.790E-07( SE) 1. 700E-06( SE) 1.860E-06( SE) 4.892E-06( SE)

SKIN (mrem) 2 960E-06(SSE) 1.580E-06( SE) 6. 020E-06 SE) 6.620E-06(WNW) 1.480E-05( SE)

ORGAN (mrem) 1.490E-04(SSE) 9.640E-05(ESE) 4. 950E-04 SE) 2.150E-04( W) 7.996E-04( SE)

CRITICAL PERSON Teenager Teenager Teenager Teenager Teenager CRITICAL ORGAN Liver Liver Thyroid Thyroid Thyroid COMPLIANCE STATUS 10 CFR 50 APP. I 10 CFR 50 APP.I TYPE OF DOSE QUARTERLY OBJECTIVE % OF APP. I YEARLY OBJECTIVE OF APP. I GAMMA AIR (mrad) 5.0 0.00 10.0 0.00 BETA AIR (mrad) 10.0 0.00 20.0 0.00 WHOLE BODY (mrem) 2.5 0.00 5.0 0.00 SKIN (mrem) 7.5 0.00 15.0 0.00 ORGAN (mrem) 7.5 0.01 15.0 0.01 CRITICAL PERSON Teenager Teenager CRITICAL ORGAN Thyroid Thyroid Calculation used release data from the following:

Unit 2 - Vent Date of calculation: 2/19/2010 Data Recovery 99.8%

(priority parameters)

E-1. 14 124 of 207

APPENDIX F METEOROLOGICAL DATA 125 of 207

Intentionally left blank 126 of 207

Byron Generating Station Period of Record: January - March 2009 Stability Class - Extremely Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 0 ENE 0 E 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW 0 NW 0 NNW 0 Variable 0 Total 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-I 127 of 207

Byron Generating Station Period of Record: January - March 2009 Stability Class - Moderately Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 0 ENE 0 E 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW 0 NW 0 NNW 0 Variable 0 Total 0 2 15 0 18 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-2 128 of 207

Byron Generating Station Period of Record: January - March 2009 Stability Class - Slightly Unstable - 250Ft-3OFt Delta-T (F)

Winds Measured at 30 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 1 12 18 3 0 34 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-3 129 of 207

Byron Generating Station Period of Record: January - March 2009 Stability Class - Neutral -. 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 20 43 28 0 0 94 NNE 16 36 10 0 0 63 NE 0 10 8 9 1 0 28 ENE 1 2 14 9 0 0 26 E 4 16 17 1 0 0 38 ESE 3 9 18 11 8 0 49 SE 1 6. 19 11 2 0 39 SSE 2 16 50 26 1 0 95 S 2 15 19 28 6 0 70 SSW 0 13 18 13 7 0 51 SW 13 27 16 7 0 63 WSW 2 15 10 18 2 0 47 W 0 17 36 35 11 6 i05 WNW 2 35 73 37 3 1 151 NW 0 34 60 32 1 0 127 NNW 2 17 68 37 0 0 124 Variable 3 2 0 0 0 0 5 Total 26 256 516 321 49 7 1175 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-4 130 of 207

Byron Generating Station Period of Record: January - March 2009 Stability Class - Slightly Stable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 24 4 0 30 NNE 6 4 3 0 13 NE 0 3 9 1 13 ENE 1 3 3 1 8 E 5 13 21 1 40 ESE 4 11 10 6 36 SE 1 17 24 16 69 SSE 0 15 36 13 64 S 0 9 28 15 54 SSW 2 14 12 5 41 SW 2 22 10 6 41 WSW 6 13 12 3 34 W 8 38 35 10 91 WNW 8 28 21 0 57 NW 10 37 19 0 66 NNW 4 35 23 0 62 Variable 1 0 0 0 1 Total 60 286 270 77 26 1 720 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-5 131 of 207

Byron Generating Station Period of Record: January - March 2009 Stability Class - Moderately Stable - 250Ft-3OFt Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 0 0 0 0 2 NNE 0 0 0 0 0 1 NE 0 1 0 0 0 0 1 ENE 1 1 0 0 0 0 2 E 3 5 0 0 0 0 8 ESE 2 6 5 0 0 0 13 SE 1 9 3 0 13 SSE 1 13 11 0 25 S 0 14 13 0 29 SSW 2 9 0 0 11 SW 3 2 0 0 5 WSW 1 3 0 0 4 W 6 7 0 0 13 WNW 5 3 0 0 8 NW 1 5 0 0 6 NNW 1 8 0 0 9 Variable 0 0 0 0 0 Total 27 89 32 2 0 0 150 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-6 132 of 207

Byron Generating Station Period of Record: January - March 2009 Stability Class - Extremely Stable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 9 3 0 0 0 12 SE 0 11 0 12 SSE 0 11 0 13 S 0 0 0 2 SSW 1 2 0 3 SW 4 0 0 4 WSW 0 0 0 0 W 0 0 0 0 WNW 2 0 0 2 NW 3 0 0 3 NNW 3 0 0 3 Variable 0 0 0 0 Total 13 33 0 54 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-7 133 of 207

Byron Generating Station Period of Record: January - March 2009 Stability Class - Extremely Unstable - 250Ft-3OFt Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 0 ENE 0 E 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W .0 WNW 0 NW 0 NNW 0 Variable 0 Total 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-8 134 of 207

Byron Generating Station Period of Record: January - March 2009 Stability Class - Moderately Unstable -. 250Ft-3OFt Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 .8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 0 ENE 0 E 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW 0 NW 0 NNW 0 Variable 0 Total 0 3 13 0 18 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-9 135 of 207

Byron Generating Station Period of Record: January - March 2009 Stability Class - Slightly Unstable - 25 0Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 NNE 0 0 1 NE 0 0 0 ENE 0 1 0 E 0 0 0 ESE 0 0 SE 0 0 SSE 0 1 S 0 0 SSW 0 2 SW 0 0 WSW 0 0 W 0 0 WNW 0 1 NW 0 2 2 NNW 0 0 0 Variable 0 0 0 Total 0 8 11 13 1 34 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-10 136 of 207

Byron Generating Station Period of Record: January - March 2009 Stability Class - Neutral - 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 15 34 17 17 1 85 NNE 7 17 34 8 0 67 NE 2 6 7 9 2 27 ENE 4 3 10 10 0 27 E 4 6 21 7 2 40 ESE 6 11 9 4 12 42 SE 6 4 13 11 8 43 SSE 12 24 36 16 5 93 S 7 14 16 23 7 67 SSW 10 13 13 9 11 56 SW 9 21 14 16 8 68 WSW 5 8 15 10 3 43 W 10 31 23 35 12 ill WNW 11 40 52 36 4 143 NW 11 35 52 29 6 133 NNW 5 28 42 28 2 105 Variable 3 0 0 0 0 4 Total 7 127 295 374 268 83 1154 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 21 Hours of missing stability measurements in all stability classes: 3 F-11I 137 of 207

Byron Generating Station Period of Record: January - March 2009 Stability Class - Slightly Stable - 250Ft-30Ft Delta-T (F)

Winds Measured at 2 50 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 24 0 0 29 NNE 4 8 0 0 15 NE 3 7 3 0 15 ENE 3 5 1 0 15 E 8 18 7 1 39 ESE 4 2 5 12 25 SE 8 19 11 24 66 SSE 10 18 14 12 55 S 6 18 28 11 64 SSW 5 21 10 11 48 SW 6 14 7 6 35 WSW 7 18 5 0 33 W 18 47 13 0 82 WNW 14 41 0 0 61 NW 20 43 2 0 70 NNW 16 41 8 0 69 Variable 0 0 0 0 0 Total 6 43 137 344 114 77 721 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-12 138 of 207

Byron Generating Station Period of Record: January - March 2009 Stability Class - Moderately Stable - 250Ft-3OFt Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 5 1 0 0 6 NNE 0 0 0 2 0 0 2 NE 0 0 1 1 0 0 2 ENE 0 0 0 0 0 0 0 E 0 2 3 2 0 0 7 ESE 0 0 6 2 1 0 9 SE 0 0 1 6 3 0 10 SSE 0 1 5 6 1 13 S 0 3 7 8 4 22 SSW 0 3 12 10 0 25 SW 0 7 3 0 0 10 WSW 0 6 1 0 0 8 W ,0 2 5 0 0 7 WNW 0 3 5 0 0 8 NW 0 5 5 0 0 11 NNW 0 3 6 0 0 10 Variable 0 0 0 0 0 0 Total 0 5 49 63 . 28 5 150 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: 3 F-13 139 of 207

Byron Generating Station Period of Record: January - March 2009 Stability Class - Extremely Stable -. 250Ft-3OFt Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 0 0 2 NNE 1 1 0 0 4 NE 0 0 0 0 0 ENE 0 0 0 0 0 E 0 0 0 0 0 ESE 0 0 0 0 1 SE 1 0 4 0 9 SSE 0 0 3 0 3 S 0 6 10 1 21 SSW 0 3 2 0 6 SW 0 1 0 0 1 WSW 0 1 0 0 1 W 0 1 0 0 1 WNW 0 1 1 0 2 NW 0 1 1 0 2 NNW 0 1 0 0 1 Variable 0 0 0 0 0 Total 2 4 18 21 8 1 54 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F- 14 140 of 207

Byron Generating Station Period of Record: April - June 2009 Stability Class - Extremely Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 0 ENE 0 E 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW 0 NW 0 0 NNW 0 0 0 Variable 0 0 0 Total 0 4 8 0 12 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-15 141 of 207

Byron Generating Station Period of Record: April - June 2009 Stability Class - Moderately Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 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 1 16 12 1 0 30 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-16 142 of 207

Byron Generating Station Period of Record: April - June 2009 Stability Class - Slightly Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 0 ENE 0 E 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 0 WNW 0 0 NW 0 2 NNW 0 2 Variable 0 0 Total 0 9 34 33 0 81 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-17 143 of 207

Byron Generating Station Period of .Record: April - June 2009 Stability Class - Neutral - 250Ft-3OFt Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 16 26 16 0 0 62 NNE 5 19 31 13 2 0 70 NE 6 13 31 15 5 0 70 ENE 1 26 50 25 1 0 103 E 4 32 46 0 0 0 82 ESE 2 6 22 7 0 0 37 SE 2 14 11 8 0 0 35 SSE 0 9 17 16 1 0 43 S 1 14 17 7 4 0 43 SSW 2 16 17 23 0 0 58 SW 2 5 11 10 0 0 28 WSW 4 16 16 12 6 1 55 W 3 27 14 20 4 0 68 WNW 0 34 55 36 2 0 127 NW 9 35 46 37 0 128 NNW 3 30 24 12 0 0 69 Variable 0 1 0 0 0 0 1 Total 48 313 434 257 26 1 1079 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-18 144 of 207

Byron Generating Station Period of Record: April - June 2009 Stability Class - Slightly Stable -. 250Ft-3OFt Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 18 2 0 0 0 24 NNE 6 19 9 0 0 0 34 NE 6 13 11 6 0 0 36 ENE 12 13 22 13 0 0 60 E 6 50 13 0 0 0 69 ESE 4 8 31 2 0 0 45 SE 1 11 15 2 0 0 29 SSE 1 8 18 9 1 1 38 S 4 15 43 6 1 0 69 SSW 2 9 25 10 3 0 49 SW 8 9 4 3 0 0 24 WSW 6 13 5 2 0 0 26 W 7 33 10 2 0 0 52 WNW 4 19 23 1 0 0 47 NW 3 17 6 0 0 0 26 NNW 3 7 8 2 0 0 20 Variable 1 0 0 0 0 0 1 Total 78 262 245 58 5 1 649 Hours of calm in this stability class: 3 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-19 145 of 207

Byron Generating Station Period of Record: April - June 2009 Stability Class - Moderately Stable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-.24 > 24 Total N 7 5 0 0 0 0 12 NNE 3 3 0 0 0 0 6 NE 3 1 0 0 0 0 4 ENE 2 2 2 0 0 0 6 E 4 12 1 0 0 0 17 ESE 2 13 2 0 0 0 17 SE 1 12 1 0 0 0 14 SSE 5 8 17 1 0 0 31 S 2 6 7 0 0 0 15 SSW 5 10 0 0 0 0 15 SW 4 5 0 0 0 0 9 WSW 14 1 0 0 0 0 15 W 22 7 0 0 0 0 29 WNW 21 5 0 0 0 0 26 NW 19 0 0 0 0 20 NNW 6 8 0 0 0 0 14 Variable 0 0 0 0 0 0 0 Total 120 99 30 1 0 0 250 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-20 146 of 207

Byron Generating Station Period of Record: April - June 2009 Stability Class - Extremely Stable - 250Ft-3OFt Delta-T (F)

Winds Measured at 30 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 NNE 0 0 0 0 0 NE 0 0 0 0 0 ENE 2 0 2 0 4 E 2 3 0 0 5 ESE 1 3 1 0 5 SE 0 4 1 0 5 SSE 2 8 1 0 11 S 4 9 0 14 SSW 1 4 0 0 5 SW 2 0 0 0 2 WSW 3 0 0 0 3 W 3 0 0 0 3 WNW 6 0 0 0 6 NW 4 0 0 0 4 NNW 1 0 0 0 1 Variable 1 0 0 0 1 Total 32 31 6 0 0 0 69 Hours of calm in this stability class: 3 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-21 147 of 207

Byron Generating Station Period of Record: April - June 2009 Stability Class - Extremely Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 0 ENE 0 E 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW 0 NW 0 NNW 0 Variable 0 Total 0 0 12 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-22 148 of 207

Byron Generating Station Period of Record: April - June 2009 Stability Class - Moderately Unstable - 250Ft-3OFt.Delta-T (F)

Winds Measured at 250 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 3 1 0 4 NE 0 0 0 0 0 1 1 ENE 0 0 1 0 0. 0 1 E 0 0 2 4 0 0 6 ESE 0 0 1 2 0 0 3 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 1 0 0 1 WSW 0 0 0 1 1 0 2 W 0 0 0 0 0 0 0 WNW 0 0 0 2 1 0 3 NW 0 1 0 2 5 0 8 NNW 0 0 0 0 1 0 1 Variable 0" 0 0 0 0 0 0 Total 0 1 4 15 9 1 30 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability cl asses: 3 F-23 149 of 207

Byron Generating Station Period of Record: April - June 2009 Stability Class - Slightly Unstable - 250Ft-3OFt Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7. 8-12 13-18 19-24 > 24 Total N 0 1 0 0 1 0 2 NNE 0 0 2 1 1 0 4 NE 0 0 2 7 1 1 11 ENE 0 0 2 2 0 0 4 E 0 0 7 3 0 0 10 ESE 0 0 3 1 0 0 4 SE 0 0 1 0 1 1 3 SSE 0 b 0 1 0 "2 S 0 0 0 2 0 2 SSW 0 0 0 6 0 7 SW 0 0 0 0 0 0 WSW 0 1 3 W 0 0 1 2 1 5 WNW 0 0 3 1 0 7 NW 0 1 0 5 1 8 NNW 0 2 0 2 0 5 Variable 0 0 0 0 0 0 Total 0 5 22 23 24 7 81 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-24 150 of 207

Byron Generating Station Period of Record: April - June 2009 Stability Class - Neutral - 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 11 8 11 14 0 46 NNE 3 8 18 29 9 3 70 NE 5 12 16 25 6 7 71 ENE 4 12 20 31 12 7 86 E 3 7 52 39 9 2 112 ESE 1 3 11 20 8 0 43 SE 1 8 7 10 5 3 34 SSE 0 5 13 3 11 4 36 S 0 6 16 11 10 1 44 SSW 2 7 11 24 13 2 59 SW 2 7 7 8 12 0 36 WSW 3 7 9 6 11 8 44 W 1 20 20 13 8 2 64 WNW 0 15 27 30 21 10 103 NW 3 21 33 50 41 9 157 NNW 0 20 23 21 9 1 74 Variable 0 0 0 0 0 0 0 Total 30 169 291 331 199 59 1079 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-25 151 of 207

Byron Generating Station Period of Record: April - June 2009 Stability Class - Slightly Stable - 250Ft-3OFt Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 5 1 1 0 7 NNE 0 3 7 18 0 0 28 NE 0 6 18 16 1 0 41 ENE 0 13 12 9 15 5 54 E 1 12 30 29 9 0 81 ESE 1 4 8 13 15 0 41 SE 0 4 2 17 16 0 39 SSE 1 1 6 9 14 6 37 S 0 2 8 17 20 7 54 SSW 0 1 6 20 20 5 52 SW 0 3 10 10 7 6 36 WSW 0 5 12 5 2 2 26 W 0 3 19 30 .1 0 53 WNW 0 3 15 22 5 0 45 NW 0 5 12 16 0 0 33 NNW 1 1 10 12 1 0 25 Variable 0 0 0 0 0 0 0 Total 4 66 180 244 127 31 652 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: 3 F-26 152 of 207

Byron Generating Station Period of Record: April - June 2009 Stability Class - Moderately Stable - 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 1 10 6 0 0 18 NNE 0 2 4 6 0 0 12 NE 1 6 3 2 0 0 12 ENE 0 5 1 0 0 0 6 E 1 1 4 5 2 0 13 ESE 1 3 1 8 5 0 18 SE 0 1 6 6 0 0 13 SSE 1 1 4 8 9 0 23 S 0 1 2 7 11 0 21 SSW 2 2 2 6 4 0 16 SW 0 1 1 2 0 0 4 WSW 1 2 3 8 0 0 14 W 0 0 6 9 0 0 15 WNW 0 3 17 6 0 0 26 NW 1 4 8 8 0 0 21 NNW 1 0 8 12 0 0 21 Variable 0 0 0 0 0 0 0 Total .10 33 80 99 31 0 253 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-27 153 of 207

Byron Generating Station Period of Record: April - June 2009 Stability Class - Extremely Stable - 250Ft-3OFt Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 1 0 0 0 N 1 2 1 0 0 0 NNE 0 1 1 1 1 0 0 NE 3 0 0 0 0 ENE 0 0 0 3 0 0 E 0 3 ESE 0 2 3 2 0 7 SE 0 3 3 3 0 9 SSE 0 1 3 1 0 5 S 0 0 7 1 0 8 SSW 1 2 6 0 0 9 SW 0 2 3 0 0 5 WSW 1 2 2 0 0 5 W 0 2 1 0 0 3 WNW 3 0 0 0 0 3 NW 2 2 2 0 0 6 NNW 1 1 0 0 0 3 Variable 0 0 0 0 0 0 Total 1 10 20 34 7 0 72 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-28 154 of 207

Byron Generating Station Period of Record: July - September 2009 Stability Class - Extremely Unstable - 250Ft-3OFt Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 0 ENE 0 E 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW 0 NW 0 0 0 NNW 0 0 0 1 Variable 0 0 0 0 Total 0 4 0 11 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-29 155 of 207

Byron Generating Station Period of Record: July - September 2009 Stability Class - Moderately Unstable - 250Ft-3OFt Delta-T (F)

Winds Measured at 30 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 7 9 1 0 0 17 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-30 156 of 207

Byron Generating Station Period of Record: July - September 2009 Stability Class - Slightly Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

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

NNE 0 4 5 NE 0 2 2 ENE 0 10 11 E 0 7 7 ESE 0 5 5 SE 0 2 2 SSE 0 0 0 S 0 2 5 SSW 0 2 8 SW 0 0 5 WSW 0 1 6 W 0 1 9 WNW 0 2 3 NW 0 1 3 NNW 0 3 6 Variable 0 0 0 Total 0 43 35 2 0 0 80 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-31 157 of 207

Byron Generating Station Period of Record: July - September 2009 Stability Class - Neutral - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 10 34 15 0 0 0 59 NNE 5 22 1 0 0 0 28 NE 5 7 6 0 0 0 18 ENE 11 13 15 0 0 0 39 E 17 42 8 0 0 0 67 ESE 7 17 4 0 0 0 28 SE 11 20 17 0 0 0 48 SSE 4 15 11 1 0 0 31 S 4 8 19 1 0 0 32 SSW 5 13 30 6 0 0 54 SW 7 16 23 1 0 0 47 WSW 12 17 18 9 0 0 56 W 8 17 19 6 0 0 50 WNW 9 45 31 17 5 0 107 NW 15 47 33 1 0 0 96 NNW 12 39 22 0 0 0 73 Variable 2 0 0 0 0 0 2 Total 144 372 272 42 5 0 835 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-32 158 of 207

Byron Generating Station Period of Record: July - September 2009 Stability Class - Slightly Stable - 250Ft-3OFt Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 11 14 0 0 0 0 25 NNE i0 13 1 0 0 0 24 NE 10 18 7 0 0 0 35 ENE 12 29 6 0 0. 0 47 E 16 36 3 0 0 0 55 ESE 5 14 3 1 0 0 23 SE 6 21 15 1 0 0 43 SSE 6 28 9 1 0 0 44 S 7 32 15 0 0 0 54 SSW 6 13 22 8 0 0 49 SW 17 12 14 0 0 0 43 WSW 15 24 3 0 0 0 42 W 12 34 2 2 0 0 50 WNW 13 21 6 3 0 0 43 NW 8 28 4 0 0 0 40 NNW 6 25 1 0 0 0 32 Variable 3 0 0 0 0 0 3 Total 163 362 111 16 0 0 652 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-33 159 of 207

Byron Generating Station Period of Record: July - September 2009 Stability Class - Moderately Stabl le - 250Ft-3OFt Delta-T (F)

Winds Measured at 30 Feet Wind Spee*d (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 6 0 0 11 NNE 4 11 1 0 16 NE 6 2 0 0 8 ENE 5 17 0 0 22 E 21 39 0 0 60 ESE 4 10 0 0 14 SE 4 14 0 0 18 SSE 2 27 1 0 30 S 11 17 1 0 29 SSW 14 6 0 0 20 SW 16 1 0 0 17 WSW 21 2 0 0 23 W 13 4 0 0 17 WNW 13 3 0 0 16 NW 26 0 0 0 26 NNW 15 6 0 0 21 Variable 1 0 0 0 1 Total 181 165 3 0 0 0 349 Hours of calm in this stability class: 9 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-34 160 of 207

Byron Generating Station Period of Record: July - September 2009 Stability Class - Extremely Stable - 250Ft-3OFt Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 N 5 1 0 0 6 0 0 NNE 5 0 0 0 5 0 0 NE 4 0 0 0 4 0 0 0 ENE 6 0 0 6 0 0 E 14 12 0 0 26 0 0 ESE 6 14 0 0 20 0 0 SE 6 5 0 0 11 6 0 0 SSE 6 0 0 12 S 0 0 15 7 0 0 22 0 0 SSW 8 2 0 0 10 0 0 SW 7 0 0 0 7 0 0 WSW 6 0 0 0 6 0 0 W 11 0 0 0 11 0 0 WNW 23 0 0 0 23 0 0 NW 35 0 0 0 35 0 0 NNW 22 0 0 0 22 0 0 Variable 1 0 0 0 1 Total 180 47 0 0 0 0 227 Hours of calm in this stability class: 22 Hours of missing wind measurements in-this stability class: 0 Hours of missing stability measurements in. all stability classes: 3 F-35 161 of 207

Byron Generating Station Period of Record: July - September 2009 Stability Class - Extremely Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 0 ENE 0 E 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW 0 NW 0 NNW 0 Variable 0 Total 0 0 11 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-36 162 of 207

Byron Generating Station Period of Record: July - September 2009 Stability Class - Moderately Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 250 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 1 11 4 1 0 17 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-37 163 of 207

Byron Generating Station Period of Record: July - September 2009 Stability Class - Slightly Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 NNE 0 NE 0 ENE 0 E 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0' WSW 0 W 0 0 10 WNW 0 0 3 NW 0 0 2 NNW 0 0 6 Variable 0 0 0

Total 0 24. 32 22 2 0 80 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-38 164 of 207

Byron Generating Station Period of Record: July - September 2009 Stability Class - Neutral - 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 22 25 7 62 NNE 13 17 2 35 NE 10 4 6 22 ENE 9 7 8 26 E 33 18 14 77 ESE 16 12 3 36 SE 17 11 7 45 SSE i2 6 11 33 S 1 10 8 24 SSW 7 16 21 56 SW 5 15 16 43 WSW 14 9 16 52 W 11 14 12 45 WNW 24 26 20 102 NW 15 48 25 102 NNW 16 37 13 73 Variable 1 0 0 2 Total 67 226 275 189 63 15 835 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-39 165 of 207

Byron Generating Station Period of Record: July - September 2009 Stability Class - Slightly Stable - 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 1 4 11 3 0 0 19 NNE 0 4 11 3 0 0 18 NE 3 13 10 2 0 0 28 ENE 3 17 15 19 0 0 54 E 3 18 25 18 3 1 68 ESE 1 3 9 9 7 0 29 SE 2 1 7 17 5 0 32 SSE 2 2 5 20 8 1 38 S 1 2 8 19 8 0 38 SSW 2 1 16 26 20 4 69 SW 1 9 9 11 8 0 38 WSW 1 10 17 13 0 0 41 W 1 6 26 6 1 0 40 WNW 3 8 19 19 2 3 54 NW 1 6 29 15 2 1 54 NNW 5 14 12 0 0 32 Variable 0 2 0 0 0 0 2 Total 26 I1i 231 212 64 10 654 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-40 166 of 207

Byron Generating Station Period of Record: July - September 2009 Stability Class - Moderately Stable - 250Ft-3OFt Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 5 2 4 0 0 11 NNE 0 2 6 4 1 0 13 NE 2 4 6 8 0 0 20 ENE 3 10 8 3 0 25 E 9 27 18 0 56 ESE 3 4 12 0 26 SE 2 4 10 0 22 SSE 0 3 7 0 13 S 1 4 14 0 25 SSW 3 6 10 0 23 SW 1 8 5 0 18 WSW 6 5 5 0 16 W 2 26 3 0 31 WNW 3 11 7 0 21 NW 0 6 9 7 0 0 22 NNW 0 2 9 5 0 0 16 Variable 0 0 0 0 0 0 0 Total 11 59 138 122 28 0 358 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-41 167 of 207

Byron Generating Station Period of Record: July - September 2009 Stability Class - Extremely Stable - 250Ft-3OFt Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 3 15 3 0 0 21 NNE 2 4 3 0 0 0 9 NE 5 7 1 0 0 0 13 ENE 6 12 3 0 0 0 21 E 5 7 8 3 0 0 23 ESE 1 15 0 24 SE 5 11 0 18 SSE 0 17 S 0 13 SSW 0 12 SW 0 13 WSW 0 ii W 0 15 WNW 0 12 NW 0 10 NNW 0 15 Variable 0 0 Total 26 64 90 60 0 247 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-42 168 of 207

Byron Generating Station Period of Record: October - December 2009 Stability Class - Extremely Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 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 0 12 1 0 0 13 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-43 169 of 207

Byron Generating Station Period of Record: October - December 2009 Stability Class - Moderately Unstable -. 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 0 ENE 0 E 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW 0 NW 0 NNW 0 Variable 0 Total 0 1 15 4 0 0 20 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-44 170 of 207

Byron Generating Station Period of Record: October - December 2009 Stability Class - Slightly Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 0 ENE 0 E 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW 0 NW 0 NNW 0 Variable 0 Total 0 7 25 4 0 0 36 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 stability classses: 0 F-45 171 of 207

Byron Generating Station Period of Record: October - December 2009 Stability Class - Neutral - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 9 52 9 73 NNE 8 10 0 19 NE 4 11 30 45 ENE 11 17 16 48 E 54 44 7 113 ESE 12 22 10 46 SE 22 18 6 48 SSE 20 27 11 60 S 22 33 12 73 SSW 14 34 1i 66 SW 31 18 4 55 WSW 37 27 27 93 W 48 41 45 144 WNW 27 67 19 120 NW 18 39 12 74 NNW 15 37 6 61 Variable 0 0 0 1 Total 55 352 497 225 10 0 1139 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-46 172 of 207

Byron Generating Station Period of Record: October - December 2009 Stability Class - Slightly Stable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 15 8 0 0 0 25 NNE 1 17 3 0 0 0 21 NE 2 15 16 3 0 0 36 ENE 2 16 12 7 0 0 37 E 12 21 12 7 0 0 52 ESE 8 27 15 1 2 0 53 SE 5 33 31 8 1 0 78 SSE 2 28 44 13 0 0 87 S 11 28 33 8 0 0 80 SSW 3 13 25 19 0 0 60 SW 7 18 11 8 0 0 44 WSW 10 27 8 5 2 0 52 W 9 22 5 2 1 0 39 WNW 7 27 8 0 0 0 42 NW 7 12 2 0 0 0 21 NNW 3 12 2 0 0 0 17 Variable 0 0 0 0 0 0 0 Total 91 331 235 81 6 0 744 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-47 173 of 207

Byron Generating Station Period of Record: October - December 2009 Stability Class - Moderately Stable - 250Ft-3OFt Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 0 0 0 0 0 3 NNE 1 3 0 0 0 0 4 NE 0 0 1 0 0 0 1 ENE 0 3 5 0 0 0 8 E 1 18 0 0 0 0 19 ESE 4 8 2 0 0 0 14 SE 1 31 7 0 0 0 39 SSE 2 10 4 0 0 0 16 S 5 19 8 0 0 0 32 SSW 6 2 3 0 0 0 11.

SW 6 0 0 0 0 0 6 WSW 6 0 0 0 0 0 6 W 8 0 0 0 0 0 8 WNW 10 3 0 0 0 0 13 NW 2 2 0 0 0 0 4 NNW 2 2 0 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 57 101 30 0 0 0 188 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes.: 0 F-48 174 of 207

Byron Generating Station Period of Record: October - December 2009 Stability Class - Extremely Stable - 250Ft-30Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 6 0 7 NNE 1 0 1 NE 0 2 ENE 0 4 E 0 6 ESE 0 12 SE 5 SSE 5 S 9 SSW 4 SW 0 WSW 1 W 2 WNW 0 NW 1 NNW 1 Variable Total 21 29 10 0 0 0 60 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: 0 F-49 175 of 207

Byron Generating Station Period of Record: October - December 2009 Stability Class - Extremely Unstable - 250Ft-3OFt Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 0 ENE 0 E 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW 0 NW 0 NNW 0 Variable 0 Total 0 0 0 12 1 0 13 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-50 176 of 207

Byron Generating Station Period of Record: October - December 2009 Stability Class - Moderately Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 250 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 0 7 10 3 0 20 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-51 177 of 207

Byron Generating Station Period of Record: October - December 2009 Stability Class - Slightly Unstable - 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 0 ENE 0 E 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW 0 NW 0 NNW 0 Variable 0 Total 0 2 15 16 3 0 336 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-52 178 of 207

Byron Generating Station Period of Record: October - December 2009 Stability Class - Neutral - 250Ft-3OFt Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 3 17 34 5 0 61 NNE 1 2 6 31 1 0 41 NE 1 1 4 9 6 3 24 ENE 0 2 3 10 28 11 54 E 2 14 51 44 8 0 119 ESE 1 2 12 16 5 4 40 SE 2 4 24 10 4 6 50 SSE 2 5 17 18 7 2 51 S 3 12 22 17 11 4 69 SSW 4 4 25 20 13 2 68 SW 1' 16 25 19 5 1 67 WSW 0 16 19 21 6 2 64 W 1 22 37 50 39 5 154 WNW 2 19 20 46 12 5 104 NW 2 9 16 59 18 0 104 NNW 2 6 17 28 4 0 57 Variable 1 0 0 0 0 0 1 Total 27 137 315 432 172 45 1128 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 13 Hours of missing stability measurements in all stability classes: 0 F-53 179 of 207

Byron Generating Station Period of Record: October - December 2009 Stability Class - Slightly Stable -. 250Ft-3OFt Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 4 17 0 0 21 NNE 0 0 4 8 0 0 12 NE 0 0 9 17 4 1 31 ENE 1 3 9 18 9 4 44 E 0 9 20 7 2 3 41 ESE 1 6 11 16 8 5 47 SE 2 5. 20 28 12 8 75 SSE 3 3 8 21 36 9 80 S 0 6 12 20 30 4 72 SSW 1 4 16 26 36 5 88 SW 1 4 16 8 18 4 51 WSW 0 6 16 10 3 2 37 W 0 2 21 18 2 5 4.8 WNW 0 7 18 12 2 0 39 NW 0 3 23 13 0 0 39 NNW 0 4 4 9 2 0 19 Variable 0 0 0 0 0 0 0 Total 9 62 211 248 164 50 744 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-54 180 of 207

,Byron Generating Station Period of Record: October - December 2009 Stability Class - Moderately Stable - 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19724 > 24 Total N 1 1 3 1 0 0 6 NNE 0 0 2 0 0 0 2 NE 0 0 4 0 0 5 ENE 0 0 0 2 0 0 2 E 0 0 6 5 1 0 12 ESE 0 1 0 7 10 0 18 SE 0 0 2 5 6 1 14 SSE 0 0 2 14 10 0 26 S 0 0 3 5 7 0 15 SSW 1 4 2 9 11 0 27 SW 0 5 7 3 0 0 15 WSW 0 1 9 0 0 0 10.

W 0 1 9 0 0 0 10 WNW 0 1 2 0 0 0 3 NW 0 0 11 7 0 0 18 NNW 0 1 4 2 0 0 7 Variable 0 0 0 0 0 0 0 Total 2 16 62 64 45 1 190 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-55 181 of 207

Byron Generating Station Period of Record: October - December 2009 Stability Class - Extremely Stable - 250Ft-30Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 2 NNE 1 0 4 NE 0 0 5 ENE 0 0 4 E 0 1 8 ESE 0 5 11 SE 0 1 3 SSE 0 0 2 S 0 0 5 SSW 0 0 5 SW 0 0 4 WSW 0 0 3 W 1 0 3 WNW 0 0 1 NW 0 0 2 NNW 0 0 2 Variable 0 0 0 Total 2 9 23 8 15 7 64 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-56 182 of 207

APPENDIX G ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR) 183 of 207

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Docket No: 50-454 50-455 BYRON NUCLEAR GENERATING STATION UNITS 1 and 2 Annual Radiological Groundwater Protection Program Report 1 January Through 31 December 2009 Prepared By Teledyne Brown Engineering Environmental Services Nuclear Byron Nuclear Generating Station Byron, IL 61010 May 2010 185 of 207

186 of 207 Table Of Contents I. Summary and Conclusions ........................................ 1 I1. Introduction ............................................................................................................. 4 A . O bjectives of the RG PP .................................................................................. 4 B. Im plem entation of the O bjectives .................................................................. 4 C . Program Description ...................................................................................... 5 D. Characteristics of Tritium (H-3) ...................................................................... 6 I1l. Program Description ................................................................................................ 6 A . Sam ple Analysis .............................................................................................. 6 B. Data Interpretation ........................................................................................ 7 C . Background Analysis ..................................................................................... 8

1. Background Concentrations of Tritium ................................................. 8 IV . Results and discussion ............................................................................................ 10 A. G roundwater Results ..................................................................................... 10 B. Drinking W ater W ell Survey ......................................................................... 11 C. Summary of Results - Inter-laboratory Comparison Program ...................... 11 D. Leaks, Spills, and Releases ......................................................................... 11 E. Trends ......................................................................................................... 11 F. Investigations ................................................................................................. 11 G . Actions Taken .............................................................................................. 11 187 of 207

Appendices Appendix A Location Designation Tables Table A-1: Radiological Groundwater Protection Program - Sampling Locations, Distance and Direction, Byron Nuclear Generating Station, 2009 Fiqures Figure A-1: Monitoring Well Locations, Byron Nuclear Generating Station, 2009 (Extra wells noted on map are for reference only.)

Appendix B Data Tables Tables Table B-1.1 Concentrations of Tritium and Strontium in Groundwater Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2009.

Table B-1.2 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of Byron Nuclear Generating Station, 2009.

ii 188 of 207

I. Summary and Conclusions In 2006, Exelon instituted a comprehensive monitoring program to evaluate the impact of station operations on groundwater in the vicinity of Byron Nuclear Generating Station. The monitoring was conducted in two phases. Phase 1 of the monitoring was part of a comprehensive study initiated by Exelon to determine whether groundwater or surface water at and in the vicinity of Byron Nuclear Generating Station had been adversely impacted by any releases of radionuclides. Phase 1 was conducted by Conestoga Rovers and Associates (CRA) and the conclusions were made available to state and federal regulators as well as the public.

Phase 2 of the RGPP was conducted by Exelon corporate and station personnel to initiate follow up of Phase 1 and begin long-term monitoring at groundwater locations selected during Phase 1. This is the third in a series of annual reports on the status of the Radiological Groundwater Protection Program (RGPP) conducted at Byron Nuclear Generating Station. This report covers groundwater samples, collected from the environment, both on and off station property in 2009. During that time period, 26 analyses were performed on 26 samples from 13 locations.

In accordance with Byron's Radiological Groundwater Protection Program, gamma-emitting radionuclides associated with licensed plant operations were not sampled in 2009. In the case of tritium, Exelon specified that its laboratories achieve a lower limit of detection 10 times lower than that required by federal regulation.

In 2009, the number of Radiological Groundwater Protection Program (RGPP) monitoring wells sampled was reduced from 22 to 13 based on the evaluation and recommendation from an environmental consulting firm. The 9 wells removed from the sampling program in 2009 had not tested positive for tritium since the program began in 2006 and were determined to be low risk for contamination based on their locations commensurate with local hydrogeology.

Tritium was not detected in any of the groundwater 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 at concentrations greater than the LLD of 200 pCi/L in two of 13 groundwater sample locations.

The tritium concentrations in these two monitoring wells ranged from 1,010 +/- 157 pCi/L to 1,360 +/- 187 pCi/L. These two monitoring wells (AR-4 & AR-1 1) are located near Circ Water Blowdown vaults (3 & 4) along the blowdown line located west of the station, where historical leakage through vacuum breakers was known to have occurred. Well AR-4 has shown an overall decrease in 189 of 207

tritium concentration since first sampled in 2006. Well AR-1 1 has shown an overall decrease in tritium concentration since first sampled in 2006 and a slight decrease from 2008.

In assessing all the data gathered for this report, it was concluded that the operation of Byron Nuclear Generating Station had no adverse radiological impact on the environment, and there are no known active releases into the groundwater at Byron Nuclear Generating Station.

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II. Introduction The Byron Station, a two-unit PWR station, is located about two miles east of the Rock River and approximately three miles southwest of Byron in Ogle County, Illinois. The reactors are designed to have capacities of 1280 and 1254 MW gross, respectively. Unit One loaded fuel in November 1984 and went on line February 2, 1985. Unit Two went on line January 9, 1987.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) on samples collected in 2009.

A. Objectives 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 before significant 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 Byron Nuclear Generating Station as discussed below:

1. Exelon and its consultant identified locations as described in the Phase 1 study. Phase 1 studies were conducted by Conestoga Rovers and Associates (CRA) and the results and conclusions were made available to state and federal regulators as well as the public.

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

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

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

5. Byron Nuclear Generating 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 Figure A-I, Appendix A.

Groundwater Samples of water are collected, managed, transported and analyzed in accordance with approved procedures following EPA methods. Only groundwater is collected. Sample locations, sample collection frequencies and analytical frequencies are controlled 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 deliverables as data are received.

Analytical data results are reviewed by both station personnel and an independent hydrogeologist for adverse trends or changes to hydrogeologic conditions.

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D. Characteristics of Tritium (H-3)

Tritium (chemical symbol H-3) is a radioactive isotope of hydrogen. The most common form of tritium is tritium oxide, which is also called "tritiated water." The chemical properties of tritium are essentially those of ordinary hydrogen.

Tritiated water behaves the same as ordinary water in both the environment and the body. Tritium can be taken into the body by drinking water, breathing air, eating food, or absorption through skin. Once tritium enters the body, it disperses quickly and is uniformly distributed throughout the body. Tritium is excreted primarily through urine with a clearance rate characterized by an effective biological half-life of about 14 days. Within one month or so after ingestion, essentially all tritium is cleared. Organically bound tritium (tritium that is incorporated in organic compounds) can remain in the body for a longer period.

Tritium is produced naturally in the upper atmosphere when cosmic rays strike air molecules. Tritium is also produced during nuclear weapons explosions, as a by-product in reactors producing electricity, and in special production reactors, where the isotopes lithium-7 and/or boron-10 are activated to produce tritium. 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 the average groundwater velocity.

Tritium has a half-life of approximately 12.3 years. It decays spontaneously to helium-3 (3He). This radioactive decay releases a beta particle (low-energy electron). The radioactive decay of tritium is the source of the health risk from exposure to tritium. Tritium is one of the least dangerous radionuclides because it emits very weak radiation and leaves the body relatively quickly. Since tritium is almost always found as water, it goes directly into soft tissues and organs. The associated dose to these tissues is generally uniform and is dependent on the water content of the specific tissue.

Ill. Program Description A. Sample Analysis This section describes the general analytical methodologies used by TBE to analyze the environmental samples for radioactivity for the Byron Nuclear Generating Station RGPP in 2009.

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

1. Concentrations of gamma emitters in groundwater (as required by procedure).

2. Concentrations of strontium in groundwater (as required by procedure).

3. Concentrations of tritium in groundwater.

B. Data Interpretation The radiological data collected prior to Byron Nuclear Generating Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Byron Nuclear Generating 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 195 of 207

this report for reporting consistency with the AREOR.

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 Byron Nuclear Generating Nuclear Power Station, Commonwealth Edison Company, Annual Report 1984, April 1985.

The pre-operational REMP contained analytical results from samples collected from the surface water and groundwater. All groundwater samples listed in the pre-Operational REMP report were <200 pCi/L.

1. Background Concentrations of Tritium The purpose of the following discussion is to summarize background measurements of tritium in various media performed by others. Additional detail may be found by consulting references (CRA 2006).

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 196 of 207

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 2006.

RadNet provides tritium precipitation concentration data for samples collected at stations through out the U.S. from 1960 up to and including 2006. Based on GNIP data for sample stations located in the U.S. Midwest, tritium concentrations peaked around 1963. This peak, which approached 10,000 pCi/L for some stations, coincided with the atmospheric testing of thermonuclear weapons. Tritium concentrations in surface water showed a sharp decline up until 1975 followed by a gradual decline since that time. Tritium concentrations in Midwest precipitation have typically been below 100 pCi/L since around 1980. Tritium concentrations in wells may still be above the 200 pCi/L detection limit from the external causes described above. Water from previous years and decades is naturally captured in groundwater, so some well water sources today are affected by the surface water from the 1960s that was elevated in tritium.

c. Surface Water Data Tritium concentrations are routinely measured in large surface water bodies, including Lake Michigan and the Mississippi River. Illinois surface water data were typically less than 100 pCi/L.

The USEPA RadNet surface water data typically has a reported 'Combined Standard Uncertainty' of 35 to 50 pCi/L.

According to USEPA, this corresponds to a +/- 70 to 100 pCi/L 95% confidence bound on each given measurement.

Therefore, the typical background data provided may be subject to measurement uncertainty of approximately +/- 70 to 197 of 207

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. 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 (Table B-l.1, Appendix B). Tritium values ranged from less than the detection limit to 1,360 pCi/I. Within the station boundary, concentrations of tritium at the bottom of the Galena-Platteville aquifer ranged from 1,010 - 1,360 pCi/L.

Outside of the station boundary, tritium concentrations were all less than detection limit (<200 pCi/L). This is based on evaluation of groundwater sample results obtained as part of the Byron Station REMP. Of the thirteen wells sampled in 2009, two contained levels of tritium above the lower limit of detection (LLD) of 200 pCi/L. They were: AR-4 (1,350 and 1,360 pCi/L), and AR-11 (1,010 & 1,110 pCi/L). Well AR-4 has shown an overall decrease in tritium concentration since first sampled in 2006. Well AR-1 1 has shown an overall decrease in tritium concentration since first sampled in 2006 and a slight decrease from 2008. The tritium detected in groundwater samples has been isolated to the Galena-Platteville aquifer, which is isolated from the deeper regional groundwater aquifer by the semi-confining Glenwood Formation. Groundwater quality data from production wells and monitoring wells at the station located below this aquifer do not indicate concentrations of tritium greater than the LLD of 200 pCi/L. As such, the tritium impact is limited to the Galena-Platteville aquifer.

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Strontium Strontium-90 was not analyzed in 2009.

Gamma Emitters Gamma-emitting radionuclides associated with licensed plant operations were not analyzed in 2009.

B. Drinking Water Well Survey No drinking water well surveys were conducted in 2009.

C. Summary of Results - Inter-Laboratory Comparison Program Inter-Laboratory Comparison Program results for TBE are presented in the AREOR.

D. Leaks, Spills, and Releases There are no new previously unidentified leaks or plumes at Byron Station. There have been no new leaks, spills or releases at Byron Station in 2009.

E. Trends Well AR-4 has shown an overall decrease in tritium concentration since first sampled in 2006. Well AR-1 1 has shown an overall decrease in tritium concentration since first sampled in 2006 and a slight decrease from 2008.

F. Investigations No investigations were initiated in 2009 due to anomalous sample results.

G. Actions Taken

1. Compensatory Actions No compensatory actions were initiated in 2009.

2. Installation of Monitoring Wells No new monitoring wells were installed in 2009.

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3. Actions to Recover/Reverse Plumes No actions were undertaken to recover/reverse plumes in 2009.

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APPENDIX A LOCATION DESIGNATION 201 of 207

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TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Distance and Direction, Byron Nuclear Generating Station, 2009 Site Site Type Temporary/Permanent Distance and Direction AR-1 Monitoring Well Permanent 0.36 miles/NNW AR-10 Monitoring Well Permanent 0.28 miles/NE AR-11 Monitoring Well Permanent 1.36 miles/WNW AR-2 Monitoring Well Permanent 0.6 miles/NW AR-3 Monitoring Well Permanent 0.8 miles/NW AR-4 Monitoring Well Permanent 1.36 miles/WNW AR-5 Monitoring Well Permanent 1.92 miles/WNW AR-6 Monitoring Well Permanent 2.04 miles/WNW AR-7 Monitoring Well Permanent 0.04 miles/W AR-8 Monitoring Well Permanent 0.12 miles/S AR-9 Monitoring Well Permanent 0.24 miles/E CAR-1 Monitoring Well Permanent 2.25 miles/WNW CAR-2 Monitoring Well Permanent 1.52 miles/WNW CAR-3 Monitoring Well Permanent 0.16 miles/SE DF-24 (EPA well) Monitoring Well Permanent 1.36 miles/WNW GW-9 Monitoring Well Permanent 0.9 miles/WNW MW-1 (EPA well) Monitoring Well Permanent 0.6 miles/NW MW-3 (EPA well) Monitoring Well Permanent 0.8 miles/NW TW-13 Monitoring Well Permanent 2.3 miles/WNW TW-14 Monitoring Well Permanent 2.25 miles/WNW TW-15 Monitoring Well Permanent 2.2 miles/WNW Well 7 Monitoring Well Permanent 0.4 miles/SE A-1 203 of 207

1' 1777-Figure A-1 Monitoring Well Locations, Byron Nuclear Generating Station, 2009

APPENDIX B DATA TABLES 205 of 207

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TABLE B-I.1 CONCENTRATIONS OF TRITIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF BYRON NUCLEAR GENERATION STATION, 2009 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 AR-1 04/27/09 < 157 AR-1 10/13/09 < 165 AR-10 04/27/09 < 155 AR-10 10/13/09 < 194 AR-11 04/29/09 1110 +/- 167 AR-11 10/15/09 1010 +/- 157 AR-2 04/29/09 < 152 AR-2 10/15/09 < 152 AR-3 04/29/09 < 155 AR-3 10/14/09 < 149 AR-4 04/29/09 1350 +/- 189 AR-4 10/15/09 1360 +/- 187 AR-7 04/27/09 < 157 AR-7 10/13/09 < 170 AR-8 04/27/09 < 151 AR-8 10/13/09 < 163 AR-9 04/27/09 < 153 AR-9 10/13/09 < 182 CAR-1 04/29/09 < 152 CAR-1 10/14/09 < 149 CAR-3 04/27/09 < 153 CAR-3 10/13/09 < 191 DF-24 04/29/09 < 154 DF-24 10/14/09 <. 170 TW-13 04/29/09 < 152 TW-13 10/14/09 < 151 B-1 207 of 207

BYRON 2010-0039, Annual Radiological Environmental Operating Report, 1 January Through 31 December 2009

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BYRON 2010-0039, Annual Radiological Environmental Operating Report, 1 January Through 31 December 2009

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