ML091330372

2008 Radioactive Effluent Release Report Submitted in Accordance with 10 CFR 50.36a

ML091330372
Person / Time
Site:	Braidwood
Issue date:	04/30/2009
From:	Bryan Hanson Exelon Generation Co, Exelon Nuclear
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
BW090036, FOIA/PA-2010-0209
Download: ML091330372 (106)

Text

Exelon Generation Company, LLC 0

www.exeloncorp.com Exelkn Braidwood Station Nuclear 35100 South Route 53, Suite 84 Braceville, IL60407-9619 April 30, 2009 BW090036 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555-0001 Braidwood Station, Units 1 and 2 Facility Operating License Nos. NPF-72 and NPF-77 NRC Docket Nos. STN 50-456 and STN 50-457

Subject:

2008 Radioactive Effluent Release Report The attached document includes the Radioactive Effluent Release Report for Braidwood Station. This report is being submitted in accordance with 10 CFR 50.36a, "Technical specifications on effluents from nuclear power reactors," and Technical Specification 5.6.3, "Radioactive Effluent Release Report," and includes a summary of radiological liquid and gaseous effluents and solid waste released from the site from January 2008 through December 2008.

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

Respectfully, Bryan Hanson Site Vice President Braidwood Station 0"4

cc: Region Administrator - NRC Region III Illinois Emergency Management Agency - Division of Nuclear Safety (report only)

Director, Licensing and Regulatory Affairs (w/o attachments)

Manager, Licensing - Braidwood/Byron (w/o attachments)

Nuclear Licensing Administrator - Braidwood/Byron (w/o attachments)

Regulatory Assurance Manager - Braidwood Station (w/o attachments)

Exelon Document Control Desk Licensing (report only)

Braidwood Commitment Management Coordinator (w/o attachments)

RADIOACTIVE EFFLUENT RELEASE REPORT January - December 2008 Facility: BRAIDWOOD NUCLEAR POWER STATION Licensee: EXELON GENERATION COMPANY. LLC

1. Regulatory Limits

a. For Noble Gases:

Dose Rate

1) Less than 500 mrem/year to the whole body.

2) Less than 3000 mrem/year to the skin.

Dose Gamma Radiation

1) Less than or equal to 5 mrad/quarter.

2) Less than or equal to 10 mrad/year.

Dose Beta Radiation

1) Less than or equal to 10 mrad/quarter.

2) Less than or equal to 20 mrad/year.

b. Iodine: (summed with particulate, see below)

c. Particulates with half-lives > 8 days:

Dose Rate

1) Less than 1500 mrem/year to any organ.

Dose

1) Less than or equal to 7.5 mrem/quarter to any organ.

2) Less than or equal to 15 mrem/year to any organ.

d. For Liquid Dose

1) Less than or equal to 1.5 mrem to the whole body during any calendar quarter.

2) Less than or equal to 5 mrem to any organ during any calendar quarter.

3) Less than or equal to 3 mrem to the whole body during any calendar year.

4) Less than or equal to 10 mrem to any organ during any calendar year.

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2. Maximum Permissible Concentration

a. Fission and Activation Gases: 10CFR20 Appendix B Table 2

b. Iodine: 10CFR20 Appendix B Table 2

c. Particulates: 10CFR20 Appendix B Table 2

d. Liquid Effluents: 10 X 10CFR20 Appendix B Table 2

3. Average Energy This item is not applicable. Release rates are calculated using an isotopic mix rather than average energy.

4. Measurements and Approximations of Total Radioactivity

a. Fission and Activation Gases, lodines, and Particulates Containment batch releases are analyzed for noble gas and tritium before being discharged by gamma isotopic and scintillation, respectively. Gaseous decay tanks are analyzed for noble gas before being discharged by gamma isotopic. Released activity is normally calculated using volume of release, which is determined by change in tank or containment pressure.

The Auxiliary Building ventilation exhaust system is continually monitored for iodines and particulates. These samples are pulled every 7 days and analyzed by gamma isotopic. The particulate samples are also analyzed quarterly for gross alpha and Sr-89/90.

Noble gas and tritium grab samples are pulled and analyzed weekly by gamma isotopic and scintillation, respectively. The average flow at the release points are used to calculate the curies released.

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

No gaseous effluent radiation instrumentation was inoperable beyond the time allowed in the ODCM during 2008.

b. Liquid Effluents The liquid release tanks are analyzed before discharge by gamma isotopic and for tritium. A representative portion of this sample is saved. This is composited, every 31 days, with other discharges that occurred and is analyzed for tritium and gross alpha. The batch composites are composited quarterly and sent to a vendor for Sr-89/90 and Fe-55 analysis. Circulating Water Blowdown, Condensate Polisher Sump and Waste Water Treatment are analyzed weekly by gamma isotopic and for tritium. These weekly samples are composited monthly.

The monthly composites are then composited quarterly and sent to a vendor for Sr-89/90 and Fe-55 analysis.

Tank volumes and activities are used to calculate the curies released for the tanks released.

The total volume of water released and the measured activity is used to calculate the diluted activity released at the discharge point from batch discharges.

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

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4. b. During performance of the Exelon Pond monthly composite analysis for January 2008, it was noted that there was no weekly composite sample for the week of 1/7/08 to 1/14/08 even though the weekly composite data sheet showed a volume discharged. There was no sample for this time period because the sample volume collected was too small of the required analysis (gamma isotopic). The low sample volume was due to the fact that the Exelon Pond pump only ran for 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> at the beginning of the sample period and was then secured. The Exelon Pond pump was off for the remainder of the week.

This missed sample had negligible impact on the monthly composite for the following reasons: 1) the volume discharged during the 10 hour1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> period was a very small portion of the total volume discharged from the pond during the month; 2) due to the size of the pond and the method by which tritium enters the pond, tritium concentration of the Exelon Pond changes very little over the course of a month, and had the aliquot for this sample period been large enough for analysis, it is unlikely that it would have significantly changed the concentration of the composite sample.

There were two instances where samples of Vacuum Breaker #1 (VB1) were not obtained.

For the week of 8/11/08 to 8/18/08, VB1 Remediation composite sample was too small to meet the requirements for quantitative analysis. The VB1 remediation pumps did not operate the entire sample period, but the sample collected during the time of operation would have been enough for proper analysis if fouling had not occurred in the sampling. The VB1 remediation system has had previous infrequent issues with iron fouling inside the piping and sample flow path. The composite sample timer was adjusted to ensure proper sample aliquot could be obtained and the piping was subsequently cleaned.

For the week of 11/10/08 to 11/17/08, the VB1 remediation composite sampler had no liquid sample. The VB1 remediation pumps ran for approximately 3.5 days during the sample period and 5 to 6 liters of sample should have been available. The composite sampler program controller was checked and found to be functioning properly. The VB1 remediation system has had previous issues with iron fouling inside the piping and sample flow path. The composite sample timer was adjusted to ensure proper sample aliquot could be obtained and the sample line solenoid isolation valve was subsequently cleaned.

The VB1 effluent flow path has not had any positive results for gamma emitters, 1-131, or gross alpha. The VB1 ground water is known to have tritium contamination but the concentration is less than the ODCM required LLD. Because of this there is no offisite dose effect from the discharged groundwater and no effect from this missed sample.

c. Less than the lower limit of detection (<LLD).

Samples are analyzed such that the Offsite Dose Calculation Manual (ODCM) LLD requirements are met. When a nuclide is not detected during the quarter then <LLD is reported.

d. Errata for Previous Annual Radioactive Effluent Release Reports None 3 of 104

BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2008 GAS RELEASES UNIT 1 (Docket Number 50-456)

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

1. Total Release Activity Ci 1.17E+00 2.92E+01 7.01E-03 6.89E-03 7.59

2. Average Release Rate uCi/sec 1.50E-01 3.71 E+00 8.82E-04 8.67E-04

3. Percent of ODCM Limit - gamma  % 5.70E-05 5.07E-03 1.12E-06 2.04E-07

4. Percent of ODCM Limit - beta  % 7.32E-04 1.27E-02 2.71 E-06 4.69E-06 B. Iodine Releases

1. Total 1-131 Activity Ci 1.90E-06 1.18E-03 <LLD <LLD 33.20

2. Average Release Rate uCi/sec 2.44E-07 1.50E-04 0.OOE+00 0.OOE+00

3. Percent of ODCM Limit - gamma  % 3.17E-02 1.91 E+01 0.OOE+00 0.00E+00 C. Particulate (> 8 day half-life) Releases

1. Gross Activity Ci <LLD <LLD 4.54E-06 <LLD 19.80

2. Average Release Rate uCi/sec 0.OOE+00 0.OOE+00 5.71 E-07 0.OOE+00

3. Percent of ODCM Limit  % 0.OOE+00 0.OOE+00 1.68E-02 0.00E+00

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

1. Total Release Activity Ci 4.85E-01 [2.72E+01 15.90E+00 I 5.74E-01 1 8.07

2. Average Release Rate uCi/sec 6.24E-02 13.46E+00 7.42E-01 I 7.22E-02

3. Percent of ODCM Limit 3.17E-02 I1.91 E+01 1.68E-02 I 1.63E-03 Note: LLD Values are included in Appendix A of this report.

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BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2008 GAS RELEASES UNIT 1 (Docket Number 50-456)

CONTINUOUS MODE AND BATCH MODE Nuclides Released __ Continuous Mode 1 Batch Mode Unit Quarter Quarter Quarter Quarter Quarter Quarter Quarter Quarter 1 2 3 4 1 2 3 4

1. Fission Gases Ar-41 Ci <LLD <LLD <LLD <LLD <LLD 2.41 E-03 <LLD 6.06E-03 Kr-85 Ci <LLD <LLD <LLD <LLD 8.44E-01 2.36E+00 <LLD <LLD Kr-85m Ci <LLD <LLD <LLD <LLD <LLD 1.36E-02 <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Xe-131m Ci <LLD <LLD <LLD <LLD 1.90E-02 3.19E-01 <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD 3.07E-01 2.50E+01 7.01E-03 7.92E-04 Xe-133m Ci <LLD <LLD <LLD <LLD <LLD 3.71 E-01 <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD 2.91E-04 1.12E+00 <LLD 3.53E-05 Xe-1 35m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Total for Period Ci <LLD <LLD <LLD <LLD 1.17E+00 2.92E+01 7.01E-03 6.89E-03

2. lodines 1-131 Ci 1.90E-06 1.18E-03 <LLD <LLD <LLD <LLD <LLD <LLD 1-132 Ci <LLD 2.50E-04 <LLD <LLD <LLD <LLD <LLD <LLD 1-133 Ci <LLD 4.94E-05 <LLD <LLD <LLD <LLD <LLD <LLD 1-134 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD 1-135 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Total for Period Ci 1.90E-06 1.48E-03 <LLD <LLD <LLD <LLD <LLD <LLD

3. Particulates Cr-51 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Co-57 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Br-82 Ci 1.53E-07 <LLD <LLD <LLD <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Tc-99m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Sn-117m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD 5 of 104

BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2008 GAS RELEASES UNIT 1 (Docket Number 50-456)

CONTINUOUS MODE AND BATCH MODE Nuclides Released ( - Continuous Mode Batch Mode Unit Quarter Quarter Quarter Quarter Quarter Quarter Quarter Quarter 1 2 3 4 1 2 3 4 Cs-134 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Nd-147 Ci <LLD <LLD 4.54E-06 <LLD <LLD <LLD <LLD <LLD Total for Period Ci 1.53E-07 <LLD 4.54E-06 <LLD <LLD <LLD <LLD <LLD

4. Tritium Ci 5.88E-02 2.66E+01 5.40E+00 <LLD 4.26E-01 5.82E-01 5.06E-01 5.74E-01 6 of 104

BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2008 GAS RELEASES UNIT 2 (Docket Number 50-457)

SUMMATION OF ALL RELEASES Units 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr, Est. Totaal IIIII I Error%

A. Fission and Activation Gas Releases

1. Total Activity Released Ci 1.29E+00 2.79E+02 8.92E+01 3.05E-02 7.59

2. Average Release Rate uCi/sec 1.66E-01 3.55E+01 1.12E+01 3.84E-03

3. Percent of ODCM Limit - gamma  % 7.60E-05 4.49E-02 5.97E-01 2.06E-05

4. Percent of ODCM Limit - beta  % 7.78E-04 1.09E-01 9.57E-02 2.60E-05 B. Iodine Releases

1. Total 1-131 Activity Ci 4.41 E-07 1.32E-03 <LLD <LLD 33.20

2. Average Release Rate uCi/sec 5.67E-08 1.68E-04 0.00E+00 0.OOE+00

3. Percent of ODCM Limit  % 1.85E-02 2.12E+01 0.00E+00 0.00E+00 C. Particulate (> 8 day half-life) Releases

1. Gross Activity Ci <LLD 9.50E-07 <LLD 3.90E-06 19.80

2. Average Release Rate uCi/sec 0.00E+00 1.22E-07 0.OOE+00 4.91 E-07

3. Percent of OCDM Limit  % 0.OOE+00 2.12E+01 0.00E+00 1.08E-02

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

1. Total Release Activity Ci 5.15E+00 2.39E+01 I 5.85E+01 I3.80E+00 8.07

2. Average Release Rate uCi/sec 6 62.E-01 I3.04E+00 17.36E+00 4.78E-01

3. Percent of ODCM Limit 1.85E-02 12.12E+01 1.66E-01 1.08E-02 Note: LLD Values are included in Appendix A of this report.

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BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2008 GAS RELEASES UNIT 2 (Docket Number 50-457)

CONTINUOUS MODE AND BATCH MODE Nuclides Released - Continuous Mode Batch Mode Unit Quarter Quarter Quarter Quarter Quarter Quarter Quarter Quarter 1 2 3 4 1 2 3 4

1. Fission Gases Ar-41 Ci <LLD <LLD <LLD <LLD <LLD 2.41 E-03 <LLD <LLD Kr-85 Ci <LLD <LLD <LLD <LLD 8.44E-01 2.36E+00 <LLD 6.06E-03 Kr-85m Ci <LLD <LLD <LLD <LLD <LLD 1.36E-02 <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD 8.68E+01 <LLD <LLD <LLD <LLD <LLD Xe-131m Ci <LLD <LLD <LLD <LLD 1.90E-02 3.19E-01 <LLD <LLD Xe-133 Ci <LLD 9.79E+01 <LLD <LLD 4.26E-01 1.77E+02 <LLD 7.92E-04 Xe-133m Ci <LLD <LLD <LLD <LLD <LLD 3.71 E-01 <LLD <LLD Xe-135 Ci <LLD <LLD 2.41E+00 2.36E-02 2.91E-04 1.12E+00 <LLD 3.53E-05 Xe-1 35m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Xe-1 38 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Total for Period Ci <LLD 9.79E+01 8.92E+01 2.36E-02 1.29E+00 1.81 E+02 <LLD 6.89E-03

2. lodines 1-131 Ci 4.41 E-07 1.32E-03 <LLD <LLD <LLD <LLD <LLD <LLD 1-132 Ci <LLD 1.92E-04 <LLD <LLD <LLD <LLD <LLD <LLD 1-133 Ci <LLD 1.16E-04 <LLD <LLD <LLD <LLD <LLD <LLD 1-134 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD 1-135 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Total for Period Ci 4.41 E-07 1.63E-03 <LLD <LLD <LLD <LLD <LLD <LLD

3. Particulates Cr-51 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Co-57 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD 1.12E-06 Co-58 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Br-82 Ci <LLD 2.65E-06 <LLD <LLD <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Sn-117m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD 8 of 104

BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2008 GAS RELEASES UNIT 2 (Docket Number 50-457)

CONTINUOUS MODE AND BATCH MODE Nuclides Released _ _Continuous Mode Batch Mode Unit Quarter Quarter Quarter Quarter Quarter Quarter Quarter Quarter 1 2 3 4 1 2 3 4 Cs-137 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Nd-147 Ci <LLD <LLD <LLD <LLID <LLD <LLD <LLD <LLD Te-132 Ci <LLD 9.50E-07 <LLD <LLD <LLD <LLD <LLD <LLD Sn-1 13 Ci <LLD <LLD <LLD 2.78E-06 <LLD <LLD <LLD <LLD Total for Period Ci <LLD 3.60E-06 <LLD 2.78E-06 <LLD <LLD <LLD 1.12E-06

4. Tritium Ci 4.73E+00 2.14E+01 5.84E+01 3.57E+00 4.15E-01 2.55E+00 1.25E-01 2.25E-01 9 of 104

BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2008 LIQUID RELEASES UNIT 1 (Docket Number 50-456)

SUMMATION OF ALL RELEASES Qtr 3rd Qtr 4th Qtr Est. Total Units I QtrI II 2nd 1st I IError %I A. Fission and Activation Products

1. Total Activity Released Ci 9.38E-04 3.40E-02 5.47E-03 1.12E-02 2.64

2. Average Concentration Released uCi/ml 2.72E-10 1.01E-08 1.76E-09 2.26E-09

3. Percent of limit  % ....

B. Tritium

1. Total Activity Released Ci 11.09E+02 4.77E+02 3.12E+01 8.78E+01 5.85

2. Average Concentration Released uCi/ml 3.16E-05 1.42E-04 1.01E-05 1.77E-05

3. % of Limit (1 E-2 uCi/ml)  % 3.16E-01 1.42E+00 1.01 E-01 1.77E-01 C. Dissolved Noble Gases

1. Total Activity Released Ci <LLD 7.44E-06 <LLD <LLD 2.64

2. Average Concentration Released uCi/ml 0.OOE+00 2.22E-12 0.OOE+00 0.OOE+00

3. % of Limit (2E-4 uCi/ml)  % 0.OOE+00 1.11 E-06 0.OOE+00 0.OOE+00 D. Gross Alpha

1. Total Activity Released Ci 3.60E-07 4.85E-05 1.39E-05 5.38E-05 14.70

12. Average Concentration Released I uCi/mI 1.04E-13 I 1.45E-11 I 4.48E-12 I 1.09E-11 1 E. Volume of Releases

11. Volume of Liquid Waste to Discharge I lters .12.13E+0517.15E+0517.51E+0412.64E+05

2. Volume of Dilution Water liters 3.45E+09 3.35E+09 3.10E+09 4.95E+09 Note: LLD Values are included in Appendix A of this report.

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

• This limit is equal to 10 times the concentration values in Appendix B, Table 2, Column 2 to 10CFR20.1001-20.2402.

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BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2008 LIQUID RELEASES UNIT 1 (Docket Numbers 50-456)

CONTINUOUS MODE & BATCH MODE Nuclides Released I - Continuous Mode - Batch Mode Unit Quarter Quarter Quarter Quarter Quarter Quarter Quarter Quarter 1 2 3 4 1 2 3 4 H-3 Ci 4.50E+00 4.65E+01 1.09E+01 2.83E+00 1.04E+02 4.30E+02 2.01 E+01 8.48E+01 Gross Alpha Ci <LLD <LLD <LLD <LLD 3.60E-07 4.85E-05 1.39E-05 5.38E-05 Ar-41 Ci <LLD <LLD <LLD <LLD <LLD 7.44E-06 <LLD <LLD Cr-51 Ci <LLD <LLD <LLD <LLD <LLD 7.91E-03 4.15E-04 4.60E-05 Mn-54 Ci <LLD <LLD <LLD <LLD 1.85E-05 2.98E-04 5.11E-05 1.18E-04 Fe-55 Ci <LLD <LLD <LLD <LLD 2.32E-05 3.13E-05 4.48E-04 3.57E-03 Co-57 Ci <LLD <LLD <LLD <LLD 2.19E-06 4.19E-05 2.06E-05 2.68E-05 Co-58 Ci <LLD <LLD <LLD <LLD 4.12E-04 1.16E-02 1.93E-03 2.13E-03 Fe-59 Ci <LLD <LLD <LLD <LLD 1.74E-05 4.73E-04 5.37E-05 5.53E-06 Co-60 Ci <LLD <LLD <LLD <LLD 1.98E-04 3.35E-03 5.58E-04 2.06E-03 Ni-65 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD <LLD 8.89E-06 <LLD <LLD Kr-85 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Nb-95 Ci <LLD <LLD <LLD <LLD 1.19E-05 1.14E-03 2.11E-04 2.36E-04 Zr-95 Ci <LLD <LLD <LLD <LLD <LLD 7.01E-04 1.08E-04 9.65E-05 Nb-97 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD 2.1OE-06 Zr-97 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Tc-99m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ru-103 Ci <LLD <LLD <LLD <LLD <LLD 1.26E-04 3.78E-06 2.78E-06 Ag-110m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Sn-1 13 Ci <LLD <LLD <LLD <LLD <LLD 5.20E-05 6.41 E-06 <LLD Sn-117m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Sb-122 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Te-123m Ci <LLD <LLD <LLD <LLD <LLD 2.85E-05 1.78E-05 3.54E-05 Sb-124 Ci <LLD <LLD <LLD <LLD 4.32E-06 7.98E-04 4.94E-05 <LLD Sb-125 Ci <LLD <LLD <LLD <LLD 2.01E-04 3.34E-03 6.70E-04 2.07E-03 Te-125m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Xe-131m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD 1-131 Ci <LLD <LLD <LLD <LLD <LLD 4.40E-04 <LLD <LLD 1-132 Ci <LLD <LLD <LLD <LLD <LLD 5.22E-06 <LLD <LLD Te-1 32 Ci <LLD <LLD <LLD <LLD <LLD 9.81 E-06 <LLD <LLD 11 of 104

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CONTINUOUS MODE & BATCH MODE Nuclides Released _ _Continuous Mode Batch Mode Unit Quarter Quarter Quarter Quarter Quarter Quarter Quarter Quarter 1 2 3 4 1 2 3 4 Ba-133 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD, <LLD 1-133 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Xe-133m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD 2.90E-05 3.06E-04 4.91E-04 4.04E-04 Xe-1 35 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD 1-134 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD 1-135 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs-136 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD 2.05E-05 2.25E-04 4.37E-04 3.55E-04 Cs-1 38 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Xe-1 38 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ba-139 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Np-239 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Total for period Ci 4.50E+00 4.65E+01 1.09E+01 2.83E+00 1.04E+02 4.30E+02 2.01 E+01 8.48E+01 12 of 104

BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2008 LIQUID RELEASES UNIT 2 (Docket Number 50-457)

SUMMATION OF ALL RELEASES Units 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Estrror %

A. Fission and Activation Products

1. Total Activity Released Ci 9.38E-04 3.40E-02 5.47E-03 1.12E-02 2.64

2. Average Concentration Released uCi/ml 2.72E-10 1.01E-08 1.76E-09 2.26E-09

3. Percent of Limit  % . _ I _

B. Tritium

1. Total Activity Released Ci 1.09E+02 4.77E+02 3.12E+01 8.78E+01 5.85

2. Average Concentration Released uCi/ml 3.16E-05 1.42E-04 1.01E-05 1.77E-05

3. % of Limit (1 E-3 uCi/ml)  % 3.16E-01 1.42E+00 1.01 E-01 1.77E-01 C. Dissolved Noble Gases

1. Total Activity Released Ci <LLD 7.44E-06 <LLD <LLD 2.64

2. Average Concentration Released uCi/mI 0.00E+00 2.22E- 12 0.OOE+00 0.00E+00

3. % of Limit (2E-4 uCi/ml)  % 0.00E+00 1.11 E-06 0.OOE+00 0.00E+00 D. Gross Alpha

1. Total Activity Released Ci 3.60E-07 4.85E-051 .39E-05 5.38E-05 114.70

12. Average Concentration Released uCi/mI 1.04E-13 1.45E-11 4.48E-12 1.09E-11 E. Volume of Releases

11. Volume of Liquid Waste to DischargeI liters 2.13E+05 7.15E+05 7.51 E+04 2.64E+05

2. Volume of Dilution Water liters 3.45E+09 3.35E+09 3.10E+09 4.95E+09 Note: LLD Values are included in Appendix A of this report.

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

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

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BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2008 LIQUID RELEASES UNIT 2 (Docket Numbers 50-457)

CONTINUOUS MODE & BATCH MODE Nuclides Released _ _Continuous Mode Batch Mode Unit Quarter Quarter Quarter Quarter Quarter Quarter Quarter Quarter 1 2 3 4 1 2 3 4 H-3 Ci 4.50E+00 4.65E+01 1.09E+01 2.83E+00 1.04E+02 4.30E+02 2.01E+01 8.48E+01 Gross Alpha Ci <LLD <LLD <LLD <LLD 3.60E-07 4.85E-05 1.39E-05 5.38E-05 Ar-41 Ci <LLD <LLD <LLD <LLD <LLD 7.44E-06 <LLD <LLD Cr-51 Ci <LLD <LLD <LLD <LLD <LLD 7.91E-03 4.15E-04 4.60E-05 Mn-54 Ci <LLD <LLDE <LLD <LLD 1.85E-05 2.98E-04 5.11E-05 1.18E-04 Fe-55 Ci <LLD <LLD <LLD <LLD 2.32E-05 3.13E-05 4.48E-04 3.57E-03 Co-57 Ci <LLD <LLD <LLD <LLD 2.19E-06 4.19E-05 2.06E-05 2.68E-05 Co-58 Ci <LLD <LLD <LLD <LLD 4.12E-04 1.16E-02 1.93E-03 2.13E-03 Fe-59 Ci <LLD <LLD <LLD <LLD 1.74E-05 4.73E-04 5.37E-05 5.53E-06 Co-60 Ci <LLD <LLD <LLD <LLD 1.98E-04 3.35E-03 5.58E-04 2.06E-03 Ni-65 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD <LLD 8.89E+06 <LLD <LLD Kr-85 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Sr-89 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Nb-95 Ci <LLD <LLD <LLD <LLD 1.19E-05 1.14E-03 2.11E-04 2.36E-04 Zr-95 Ci <LLD <LLD <LLD <LLD <LLD 7.01 E-04 1.08E-04 9.65E-05 Nb-97 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD 2.10E-06 Zr-97 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Tc-99m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ru-1 03 Ci <LLD <LLD <LLD <LLD <LLD 1.26E-04 3.78E-06 2.78E-06 Ag-110m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Sn-113 Ci <LLD <LLD <LLD <LLD <LLD 5.20E-05 6.41E-06 <LLD Sn-117m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Sb-122 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Te-123m Ci <LLD <LLD <LLD <LLD <LLD 2.85E-05 1.78E-05 3.54E-05 Sb-124 Ci <LLD <LLD <LLD <LLD 4.32E-06 7.98E-04 4.94E-05 <LLD Sb-125 Ci <LLD <LLD <LLD <LLD 2.1OE-04 3.34E-03 6.70E-04 2.07E-03 Te-125m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Xe-131m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD I-131 Ci <LLD <LLD <LLD <LLD <LLD 4.40E-04 <LLD <LLD 1-132 Ci <LLD <LLD <LLD <LLD <LLD 5.22E-06 <LLD <LLD Te-132 Ci <LLD <LLD <LLD <LLD <LLD 9.81E-06 <LLD <LLD 14 of 104

BRAIDWOOD NUCLEAR POWER STATION ANNUAL EFFLUENT REPORT FOR 2008 LIQUID RELEASES UNIT 2 (Docket Numbers 50-457)

CONTINUOUS MODE & BATCH MODE Nuclides Released Continuous Mode Batch Mode Unit Quarter Quarter Quarter Quarter Quarter Quarter Quarter Quarter Ba-133 Ci 1

<LLD F<LLD 2 3

<LLD 4

<LLD 1

<LLD 2

<LLD 3

<LLD 4

<LLD B-133 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Xe-133m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD 2.90E-05 3.06E-04 4.91E-04 4.04E-04 Xe-135 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD 1-134 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD I-135 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs-136 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs-1 37 Ci <LLD <LLD <LLD <LLD 2.05E-05 2.25E-04 4.37E-04 3.55E-04 Cs-1 38 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Xe-1 38 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ba-139 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Np-239 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Total for period Ci 4.50E+00 4.65E+01 1.09E+01 2.83E+00 1.04E+02 4.30E+02 2.01 E+01 8.48E+01 15 of 104

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2008 SOLID RADIOACTIVE WASTE UNIT 1 AND 2 COMBINED (Docket Numbers 50-456 and 50-457)

A. Solid Waste Shipped Offsite for Burial or Disposal (Not irradiated fuel)

1. Types of Waste Total Types of Waste Quantity Total Activity Period Est. Total (m3 ) (Ci) Error %

a. Spent resins, filter sludges, evaporator bottoms, etc 1.45E+02 2.55E+01 Jan - Dec 25 2008 ____

Jan - Dec

b. Dry compressible waste, contaminated equip, etc 3.19E+02 6.84E+00 2008 25 Jan - Dec N/

c. Irradiated components, control rods, etc 0 0 2008

-Dec N/A

d. Other (oil, reverse osmosis reject water, soil, Lagoon 1.06E+02 4.58E-04 Jan - Dec 25 sediment) 2008

2. Estimate of major nuclide composition (by waste type)

Major Nuclide Composition  %

a. Co-58 43.41%

Fe-55 14.17%

H-3 10.27%

Ni-63 7.76%

Co-60 6.25%

Cr-51 4.77%

1-131 3.28%

Be-7 2.68%

Mn-54 1.59%

Nb-95 1.38%

Cs-134 1.37%

Cs-137 1.14%

Zr-95 0.74%

C-14 0.41%

Fe-59 0.35%

Co-57 0.14%

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2008 SOLID RADIOACTIVE WASTE UNIT 1 AND 2 COMBINED (Docket Numbers 50-456 and 50-457)

2. Estimate of major nuclide composition (by waste type) cont.

Major Nuclide Composition  %

b. N-63 39.73%

Fe-55 29.12%

Co-60 20.38%

Co-58 3.09%

Cs-137 2.28%

C-14 1.41%

H-3 1.08%

Cs-134 0.92%

Mn-54 0.48%

Ni-59 0.40%

Sb-125 0.34%

Fe-59 0.26%

Nb-95 0.21%

Zr-95 0.11%

c. N/A N/A

d. H-3 89.48%

Fe-55 3.92%

Ni-63 2.32%

Co-60 1.81%

Be-7 1.39%

Cs-137 1.12%

3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 1 Hittman Transportation Barnwell Disposal Facility 6 Hittman Transportation Clive Disposal Facility(containerized) 9 Hittman Transportation Duratek 10 Hittman Transportation Duratek Services - Gallaher Rd.

6 Visionary Solutions, LLC Duratek Services - Gallaher Rd.

B. Irradiated Fuel ShiDments (disposition)

No irradiated fuel shipments for January through December, 2008.

C. Changes to the Process Control Program There were changes to the process control program in 2008. See Item #1 on page 18.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2008 UNIT 1 AND 2 COMBINED (Docket Numbers 50-456 and 50-457)

1. In 2008, there were changes to the Process Control Program. The changes to corporate procedure RW-AA-100, Process Control Program for Radioactive Wastes, were administrative in nature. The changes included many instances of replacing the words, "will", "must", and "should" with the word "shall". The changes included several editorial/format changes where words that had previously been bold were changed to normal format. Administrative instructions were placed in the Documentation section of the procedure. The changes do not affect the physical processing of the radioactive waste as described in the PCP. The changes do not affect the expected offsite dose resulting from the processing or disposal of radioactive waste.

2. During 2008, the following radioactive waste system changes were made.

A 500,000 gallon liquid radioactive waste storage tank was completed. This tank will be used to store high concentration tritium containing waste water to help manage the site inventory and discharge of liquid tritium. Additionally, equipment was installed to manage the inventory of brine (reverse osmosis unit reject) from processing of liquid radwaste. This equipment includes pumps, valves, and piping to transfer the brine to the liquid radwaste release tanks. This equipment and its use will not increase offsite dose since the radioactivity released from the station's liquid release tanks will be the same or lower in any given year.

3. There were no liquid release tanks or gas decay tanks which exceeded the limits addressed in the ODCM-RETS.

4. There were no unplanned liquid releases in 2008.

Three abnormal gaseous releases occurred in 2008 and are described below.

On 5/14/08 through 5/16/08, a planned and monitored release took place from the OWX27T, Radwaste Storage Tank. Even though the release was planned and monitored, that path to the environment is not a normal station effluent path, and therefore this release is being listed as abnormal. At the time of the release, the OWX27T contained liquid radioactive waste with a high concentration of tritium (approximately 1.1 gCi/g). To perform maintenance on the interior of the tank, the tank was drained. The small volume of water that remained on the floor of the tank after draining was dried through evaporation using fans flowing out of the tank manway. Prior to the drying step, the water was sampled for tritium and gamma isotopes. Only tritium was above the effluent LLD and a conservative release permit was performed in the Radiological Effluent Tracking and Dose Assessment Software (RETDAS). Permit #2008214 was used to calculate offsite dose from the release. The calculated dose was insignificant.

The OE Gas Decay Tank was identified as losing pressure after a release. The tank pressure following the release was 8 psig. Over the next six days, 6/4/08 to 6/10/08, the pressure dropped to 1 psig. This additional pressure loss was considered an abnormal release and the offsite dose calculated using RETDAS permit #2008237.

On 4/24/08, an unplanned discharge of radioactive gas to the Unit 2 Containment Building occurred.

The release of this gas to the environment was through normal and monitored pathways. Samples were obtained and a bounding calculation was performed to show that offsite dose was not affected by this event.

5. The following effluent monitoring instruments have exceeded their specified inoperability time.

OF-WX001 (Liquid Radwaste Effluent Line Loop WX001) exceeded its specified inoperability time on 4/24/07. At that time, required surveillances for this effluent instrument were taken to "suspend" and were not performed because this effluent flow path was no longer in use at Braidwood Station. The instrument continues to be inoperable and no liquid releases have taken place through this release path during the time of inoperability. A design change and modification to this flow path are in progress. Required surveillances will be performed prior to this flow path being put back in service.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2008 UNIT 1 AND 2 COMBINED (Docket Numbers 50-456 and 50-457)

6. No changes were made to the ODCM in 2008.

7. NUREG-0543, Methods for Demonstrating LWR Compliance with the EPA Uranium Fuel Cycle Standard (40 CFR Part 190) states in section IV, "As long as a nuclear plant site operates at a level below the Appendix I reporting requirements, no extra analysis is required to demonstrate compliance with the 40 CFR Part 190." The organ and whole body doses reported on pages 28 through 49 are determined using 10 CFR 50 Appendix I methodology. The doses are below the limits of Appendix I.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2008 UNIT 1 AND 2 (Docket Numbers 50-456 and 50-457)

APPENDIX A LLD Tables 20 of 104

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2008 UNIT 1 AND 2 (Docket Numbers 50-456 and 50-457)

LLD VALUES FOR GASEOUS RELEASES Isotope LLD (Ci/ml)

Alpha 7.11 E-19 H-3 8.03E- 14 Ar-41 7.63E-13 Mn-54 1.89E-1 8 Co-57 1.02E-18 Co-58 5.67E-19 Fe-59 3.64E-18 Co-60 8.94E-19 Zn-65 4.80E-1 8 Br-82 7.44E-19 Kr-85 5.83E-1 1 Kr-85m 7.03E-13 Kr-87 7.59E-13 Kr-88 3.18E-12 Sr-89 1.41 E-20 Sr-90 2.71 E-21 Mo-99 9.37E-19 1-131 8.96E-19 1-132 2.38E-17 1-133 1.17E-18 Xe-131m 1.82E-11 Xe-133 1.27E-12 Xe-1 33m 4.87E-12 Cs-134 2.25E-1 8 1-135 2.88E-18 Xe-135 5.17E-13 Xe-135m 1.48E- 11 Cs-137 2.18E-18 Xe-138 4.65E-11 Ba-139 1.04E-15 Ba-1 40 4.45E-18 La- 140 3.64E-18 Ce-141 1.78E-18 Ce-144 7.93E-18 NOTE: LLD Value for total activity released is based on LLD values for individual isotopes used in the calculation.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2008 UNIT 1 AND 2 (Docket Numbers 50-456 and 50-457)

LLD VALUES FOR LIQUID RELEASES Isotope LLD (Ci/ml)

Alpha 4.90E-14 H-3 8.OOE-12 Ar-41 3.73E-14 Cr-51 4.46E-13 Mn-54 1.56E-14 Fe-55 6.99E-13 Co-57 4.64E- 14 Co-58 4.39E-14 Fe-59 3.94E-14 Co-60 9.40E-14 Zn-65 4.04E-1 4 Sr-89 4.OOE-1 4 Sr-90 9.23E-15 Nb-95 1.64E-14 Zr-95 1.22E-13 Nb-97 1.51 E-13 Mo-99 2.94E-1 3 Tc-99m 3.OOE-1 3 Ag-110m 7.89E- 14 Sb-124 5.43E-14 Sb-125 1.87E-1 3 Te-125m 1.62E-11 1-131 1.36E-13 Xe-133 1.41E-13 Cs-134 5.02E-14 Cs-137 6.50E-14 Ba-139 3.57E-13 Ba-140 1.50E-1 3 La-1 40 5.89E-13 Ce-141 9.35E-14 Ce-144 3.48E-1 3 Kr-85 9.29E-1 2 Nb-95 1.64E-14 Sb-122 4.32E-13 Te-123m 4.92E- 14 Te-132 2.28E-13 1-132 5.93E-1 4 1-133 2.37E-1 1 Cs-136 9.72E-14 Xe-133m 3.81 E-1 3 Xe-131m 1.72E-12 Np-239 1.64E-12 Ba-133 6.31 E-14 Xe-135 2.43E-13 NOTE: LLD Value for Total Activity Released is based on LLD Values for individual isotopes used in the calculation.

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BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2008 UNIT 1 AND 2 (Docket Numbers 50-456 and 50-457)

APPENDIX B Supplemental Information 23 of 104

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2008 UNIT COMMON GASEOUS EFFLUENTS SUPPLEMENTAL RELEASE INFORMATION A. Batch Release 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Total

1. Total Number of Batch Releases 9 2 16 1 28

2. Total Time Period for Batch Releases (minutes) 1,499 401 6,288 827 9,015

3. Maximum Time Period for a Batch Release (minutes) 458 398 1,600 827 N/A

4. Average Time Period for a Batch Release (minutes) 167 201 393 827 N/A

5. Minimum Time Period for a Batch Release (minutes) 2 3 2 827 N/A B. Abnormal Releases

1. Number of Releases 0 2 0 0 2

2. Total Activity Released (Ci) 0 2.95E-01 0 0 2.95E-01 24 of 104

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2008 UNIT 1 (Docket Number 50-456)

GASEOUS EFFLUENTS SUPPLEMENTAL RELEASE INFORMATION A. Batch Release 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Total

1. Total Number of Batch Releases 16 14 16 18 64

2. Total Time Period for Batch Releases (minutes) 729 1,971 1,990 659 5,349

3. Maximum Time Period for a Batch Release (minutes) 162 1,470 1,470 52 N/A

4. Average Time Period for a Batch Release (minutes) 46 141 124 37 N/A

5. Minimum Time Period for a Batch Release (minutes) 23 24 24 17 N/A B. Abnormal Releases

1. Number of Releases 0 0 0 0 0

2. Total Activity Released (Ci) 0 0 0 0 0 25 of 104

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2008 UNIT 2 (Docket Number 50-457)

GASEOUS EFFLUENTS SUPPLEMENTAL RELEASE INFORMATION A. Batch Release 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Total

1. Total Number of Batch Releases 32 26 23 20 101

2. Total Time Period for Batch Releases (minutes) 1,443 28,318 862 1,455 32,078

3. Maximum Time Period for a Batch Release (minutes) 274 19,600 150 705 N/A

4. Average Time Period for a Batch Release (minutes) 45 1,089 37 73 N/A

5. Minimum Time Period for a Batch Release (minutes) 11 16 16 24 N/A B. Abnormal Releases

1. Number of Releases 0 0 0 0 0

2. Total Activity Released (Ci) 0 0 0 0 0 26 of 104

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2008 UNIT 1 AND 2 COMBINED (Docket Numbers 50-456 and 50-457)

BRAIDWOOD NUCLEAR POWER STATION LIQUID EFFLUENTS SUPPLEMENTAL RELEASE INFORMATION A. Batch Release 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Total

1. Total Number of Batch 15 42 4 16 77 Releases

2. Total Time Period for Batch 3,328 10,666 991 4,264 19,249 Releases (minutes)

3. Maximum Time Period for a 283 516 295 493 N/A Batch Release (minutes)

4. Average Time Period for a 222 254 248 267 N/A Batch Release

5. Minimum Time Period for a 9 5 221 206 N/A Batch Release (minutes)

6. Average Stream Flow During Periods of Release of Effluent 2.82E+07 1.26E+07 9.08E+06 1.47E+07 N/A into a Flowing Stream (liters/min)

B. Abnormal Releases

1. Number of Releases 0 0 0 0 0

2. Total Activity Released (Ci) 0.00+00 0.00+00 0.00+00 0.OOE+00 O.OOE+00 27 of 104

RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ........... 1 All Gas Release Types Period Start Date .... .. 01/01/2008 00:00 Period End Date ...... .. 01/01/2009 00:00 Period Duration (min): 5.270E+05 Coefficient Type ..... .. Historical Unit ..................... 1 RELEASE DATA Total Release Duration (minutes) ...................................... 1.735E+05 Total Release Volume (cf) ............................................. 1.898E+10 Average Release Flowrate (cfm) ........................................ 1.094E+05 Average Period Flowrate (cfm) ......................................... 3.602E+04

=== NUCLIDE DATA Average ECrcent Nuclide uCi uCi/cc Ratio EC AR- 41 2 .41E+03 4 .48E-12 4.48E-04 1.OOE-08 KR-85M 1 .36E+04 2. 53E-11 2.53E-04 1.OOE-07 KR-85 3 .21E+06 5. 98E-09 8.54E-03 7. OOE-07 XE-133M 3 .71E+05 6. 90E-10 1.15E-03 6.00E-07 XE-131M 3 .38E+05 6.30E-10 3.15E-04 2.00E-06 XE-135 1. 12E+06 2. 09E-09 2.99E-02 7.00E-08 XE-133 2 .53E+07 4. 71E-08 9.41E-02 5.00E-07 F&AG 3 . 04E+07 5.65E-08 1.35E-01 1-131 1. 18E+03 2.20E-12 1.10E-02 2. 00E-10 1-132 2 .50E+02 4.65E-13 2.32E-05 2.00E-08 1-133 4. 94E+01 9.20E-14 9.20E-05 1.00E-09 Iodine 1. 48E+03 2.76E-12 1. 11E-02 BR-82 1. 53E-01 2. 84E-16 5. 69E-08 5.00E-09 Other 1. 53E-01 2. 84E-16 5.69E-08 H-3 3 .41E+07 6.35E-08 6.35E-01 1.OOE-07 H-3 3 .41E+07 6.35E-08 6.35E-01 ND-147 4 .54E+00 8.45E-15 8.45E-06 1.00E-09 P>=8 4. 54E+00 8.45E-15 8.45E-06 Total 6.45E+07 1.20E-07 7.81E-01 Date/Time: 04/15/2009 10:10 retdasID: Retdas Page - I 28 of 104

RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ............. 1 All Gas Release Types Period Start Date ....  :.01/01/2008 00:00 Period End Date ...... .. 01/01/2009 00:00 Period Duration (min): 5.270E+05 Coefficient Type ..... .. Historical Unit ..................... 1 Date/Time: 04/15/2009 10:10 retdasID: Retdas Page - 2 29 of 104

RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ........... 1 All Gas Release Types Period Start Date .... 01/01/2008 00:00 Period End Date ...... 01/01/2009 00:00 Period Duration (min): 5.270E+05 Coefficient Type ..... : Historical Unit .................... 1 Receptor ................ 5 Composite Crit. Receptor - IP Distance (meters) .... .. 0.0 Compass Point .......... 0.0 PERIOD DOSE BY AGEGROUP, PATHWAY, ORGAN (mrem)

Age/Path Bone Liver Thyroid Kidney Lung GI-Lli Skin TB AGPD 1. 09E-05 1.09E-05 1. 09E-05 1. 09E-05 1. 09E-05 1. 09E-05 0. OOE+00 1.09E-05 AINHL 1. 13E-06 9. 04E-04 1.43E-03 9. 05E-04 9. 02E-04 9. 02E-04 0 OOE+00 9. 03E-04 AVEG 4. 98E-05 1. 69E-03 2. 50E-02 1. 74E-03 1.62E-03 1. 64E-03 0 OOE+00 1.66E-03 AGMILK 2 .19E-04 1. 43E-03 1. 04E-01 1. 65E-03 1. 11E-03 1.20E-03 0. OOE+00 1.29E-03 ACMEAT 6. 62E-06 2. 42E-04 3. 34E-03 2.49E-04 2 .33E-04 2 .35E-04 0. OOE+00 2 .38E-04 ACMILK 1. 83E-04 8. 08E-04 8. 62E-02 9. 94E-04 5. 46E-04 6.16E-04 0. OOE+00 6.96E-04 TGPD 1. 09E-05 1. 09E-05 1.09E-05 1.09E-05 1. 09E-05 1. 09E-05 0. OOE+00 1. 09E-05 TINHL 1. 58E-06 9. 12E-04 1.55E-03 9. 14E-04 9.10E-04 9. IOE-04 0. OOE+00 9. l1E-04 TVEG 4. 74E-05 1. 92E-03 2. 12E-02 1.97E-03 1. 85E-03 1. 87E-03 0. OOE+00 1.89E-03 TGMILK 3. 98E-04 2 O1E-03 1.64E-01 2. 41E-03 1.45E-03 1. 56E-03 0. OOE+00 1.75E-03 TCMEAT 5. 50E-06 1. 46E-04 2.39E-03 1.52E-04 1.39E-04 1.40E-04 0. OOE+00 1.43E-04 TCMILK 3.31E-04 1. 18E-03 1.36E-01 1. 51E-03 7. lIE-04 8. 03E-04 0. OOE+00 9.60E-04 CGPD 1. 09E-05 1. 09E-05 1. 09E-05 1. 09E-05 1. 09E-05 1. 09E-05 0. OOE+00 1. 09E-05 CINHL 2. 15E-06 8. 06E-04 1. 52E-03 8. 07E-04 8. 04E-04 8. 04E-04 0 OOE+00 8. 05E-04 CVEG 8. 82E-05 2 96E-03 3. 22E-02 3. 02E-03 2. 88E-03 2. 88E-03 0 OOE+00 2. 93E-03 CGMILK 9. 65E-04 3. 27E-03 3. 23E-01 3.89E-03 2 30E-03 2 38E-03 0 OOE+00 2.85E-03 CCMEAT 1. 02E-05 1. 78E-04 3. 56E-03 1.85E-04 1. 68E-04 1. 69E-04 0. OOE+00 1. 74E-04 CCMILK 8. 04E-04 1. 94E-03 2. 68E-01 2 .45E-03 1.13E-03 1 .20E-03 0. OOE+00 1. 59E-03 IGPD 1. 09E-05 1. 09E-05 1. 09E-05 1.09E-05 1. 09E-05 1. 09E-05 0. OOE+00 1. 09E-05 IINHL 1. 69E-06 4. 64E-04 1. 12E-03 4. 65E-04 4. 62E-04 4 62E-04 0. OOE+00 4. 63E-04 IGMILK 2.01E-03 5. 86E-03 7. 83E-01 6. 26E-03 3.49E-03 3 57E-03 0. OOE+00 4. 53E-03 ICMILK 1.68E-03 3 69E-03 6. 51E-01 4. 02E-03 1.71E-03 1.78E-03 0. OOE+00 2 58E-03 PERIOD DOSE BY AGEGROUP, ORGAN (mrem)

Agegroup Bone Liver Thyroid Kidney Lung GI-Lli Skin TB ADULT 4.70E-04 5. 08E-03 2 .20E-01 5. 55E-03 4. 43E-03 4. 60E-03 0. OOE+00 4. 80E-03 TEEN 7. 95E-04 6. 17E-03 3.25E-01 6. 96E-03 5. 07E-03 5. 29E-03 0. OOE+00 5.66E-03 CHILD 1.88E-03 9 .16E-03 6.29E-01 1.04E-02 7 .28E-03 7. 45E-03 0. OOE+00 8. 35E-03 INFANT 3.70E-03 1. OOE-02 1.44E+00 1.08E-02 5.67E-03 5. 83E-03 0. OOE+00 7. 58E-03 Date/Time: 04/15/2009 10:10 retdasID: Retdas Page - 3 30 of 104

RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ............. 1 All Gas Release Types Period Start Date ....  :.01/01/2008 00:00 Period End Date ...... .. 01/01/2009 00:00 Period Duration (min): 5.270E+05 Coefficient Type ..... Historical Unit ....... ............ 1 Receptor..............: 5 Composite Crit. Receptor - IP Distance (meters) ....  :.0.0 Compass Point .......... 0.0 MAXIMUM PERIOD DOSE TO LIMIT ( Any Organ)

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

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End INFANT THYROID 1.44E+00 Qrtr->End INFANT THYROID 1.44E+00 31-day 2.25E-01 6.38E+02 3.OOE-01 4.78E+02 Year->End INFANT THYROID 1.44E+00 Quarter 5.63E+00 2.55E+01 7.50E+00 1.91E+01 Annual 1.13E+01 1.28E+01 1.50E+01 9.57E+00 Critical Pathway ........ 3 Grs/Goat/Milk (GMILK)

Major Contributors ...... 0.0 % or greater to total Nuclide Percentage H-3 3.94E-01 1-131 9.96E+01 1-132 1.20E-04 1-133 3.84E-02 ND-147 1.40E-06 MAXIMUM PERIOD DOSE TO LIMIT (Tot Body)

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

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End CHILD TBODY 8.35E-0 Qrtr->End CHILD TBODY 8.35E-0 3 31-day 1.50E-01 5.57E+00 2.OOE-01 4.18E+00 Year->End CHILD TBODY 8.35E-0 3 Quarter 5.25E+00 1.59E-01 7.50E+00 1.lE-01 3 Annual 1.05E+01 7.95E-02 1.50E+01 5.57E-02 Critical Pathway ........  :.2 Vegetation (VEG)

Major Contributors ......  :.0.0  % or greater to total Nuclide Percentage H-3 8.71E+01 1-131 1.29E+01 1-132 2.14E-03 1-133 6.90E-03 ND-147 2.42E-04 Date/Time: 04/15/2009 10:10 retdasID: Retdas Page - 4 31 of 104

RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ............. 1 All Gas Release Types Period Start Date .... .. 01/01/2008 00:00 Period End Date ...... 01/01/2009 00:00 Period Duration (min): 5.270E+05 Coefficient Type ..... .. Historical Unit ..................... 1 Receptor ............... 4 Composite Crit. Receptor - NG Distance (meters) .... .. 0.0 Compass Point .......... 0.0 MAXIMUM PERIOD NG DOSE TO LIMIT (Gamma)

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

Period Dose Type (mrad) Period Limit of Limit Limit of Limit Strt->End Gamma 2.56E-04 Qrtr->End Gamma 2.56E-04 31-day 1.50E-01 1.71E-01 2.OOE-01 1.28E-01 Year->End Gamma 2.56E-04 Quarter 3.75E+00 6.84E-03 5.00E+00 5.13E-03 Annual 7.50E+00 3.42E-03 1.00E+01 2.56E-03 Major Contributors ...... .. 0.0  % or greater to total Nuclide Percentage AR-41 1.97E-01 KR-85M 1.47E-01 KR-85 4.87E-01 XE-133M 1.07E+00 XE-131M 4.65E-01 XE-135 1.90E+01 XE-133 7.86E+01 MAXIMUM PERIOD NG DOSE TO LIMIT (Beta))

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

Period Dose Type (mrad) Period Limit of Limit Limit of Limit Strt->End Beta 1.35E-03 Qrtr->End Beta 1.35E-03 31-day 3.OOE-01 4.49E-01 4.OOE-01 3.36E-01 Year->End Beta 1.35E-03 Quarter 7.50E+00 1.79E-02 1.OOE+01 1.35E-02 Annual 1.50E+01 8.97E-03 2.OOE+01 6.73E-03 Major Contributors ...... .. 0.0  % or greater to total Nuclide Percentage AR-41 2.16E-02 KR-85M 7.31E-02 KR-85 1.71E+01 XE-133M 1.50E+00 XE-131M 1.03E+00 XE-135 7.57E+00 XE-133 7.27E+01 Date/Time: 04/15/2009 10:10 retdasID: Retdas LAST Page - 5 32 of 104

RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ........... 1 All Gas Release Types Period Start Date .... .. 01/01/2008 00:00 Period End Date ...... .. 01/01/2009 00:00 Period Duration (min): 5.270E+05 Coefficient Type ..... .. Historical Unit ..................... 2

=== RELEASE DATA Total Release Duration (minutes) ...................................... 3.267E+05 Total Release Volume (cf) ............................................. 3.278E+10 Average Release Flowrate (cfm) ........................................ 1.003E+05 Average Period Flowrate (cfm) ......................................... 6.219E+04

=== NUCLIDE DATA Average ECrcent Nuclide uCi uCi/cc Ratio EC AR-41 2.41E+03 2.60E-12 2. 60E-04 1. OOE-08 KR-85M 1.36E+04 1.46E-11 1.46E-04 1. OOE-07 KR-85 3 .21E+06 3.46E-09 4.95E-03 7 OOE-07 XE-133M 3 . 71E+05 3.99E-10 6.66E-04 6 OOE-07 KR- 88 8. 68E+07 9.35E-08 1.04E+01 9 OOE-09 XE-131M 3 38E+05 3.65E-10 1.82E-04 2 OOE-06 XE-135 3 .55E+06 3.83E-09 5.47E-02 7 OOE-08 XE-133 2. 75E+08 2.97E-07 5.93E-01 5 OOE-07 F&AG 3. 70E+08 3.98E-07 1.10E+01 1-131 1.32E+03 1.42E-12 7.09E-03 2. OOE-10 1-132 1. 92E+02 2.07E-13 1.03E-05 2 .OOE-08 1-133 1. 16E+02 1.25E-13 1.25E-04 1. OOE-09 Iodine 1 . 62E+03 1.75E-12 7.23E-03 BR- 82 2 .65E+00 2.85E-15 5.70E-07 5. OOE-09 Other 2.65E+00 2.85E-15 5.70E-07 H-3 9. 14E+07 9.84E-08 9.84E-01 1. OOE-07 H-3 9. 14E+07 9.84E-08 9.84E-01 TE-132 9.50E-01 1.02E-15 1.14E-06 9. OOE-10 P<8 9.50E-01 1.02E-15 1.14E-06 CO-57 1.12E+00 1.21E-15 1.34E-06 9.OOE-10 SN-113 2.78E+00 2.99E-15 3.74E-06 8.00E-10 Date/Time: 04/15/2009 10:16 retdasID: Retdas Page - 1 33 of 104

RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ............ 1 All Gas Release Types Period Start Date .... 01/01/2008 00:00 Period End Date ....... 01/01/2009 00:00 Period Duration (min): 5.270E+05 Coefficient Type ...... Historical Unit ..................

NUCLIDE DATA == - - - - - - - - - - - - - - -

Average ECrcent Nuclide uCi uCi/cc Ratio EC P>=8 3 . 90E+00 4.20E-15 5.09E-06 Total 4.61E+08 4.97E-07 1.20E+01 Date/Time: 04/15/2009 10:16 retdasID: Retdas Page - 2 34 of 104

RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ........... 1 All Gas Release Types Period Start Date .... 01/01/2008 00:00 Period End Date ...... .. 01/01/2009 00:00 Period Duration (min): 5.270E+05 Coefficient Type ..... .. Historical Unit ..................... 2 Receptor ................ 5 Composite Crit. Receptor - IP Distance (meters) .... .. 0.0 Compass Point .......... 0.0 PERIOD DOSE BY AGEGROUP, PATHWAY, ORGAN (mrem)

Age/Path Bone Liver Thyroid Kidney Lung GI-Lli Skin TB AGPD 1.21E-05 1.21E-05 1.21E-05 1.21E-05 1.21E-05 1.21E-05 0.OOE+00 1.21E-05 AINHL 1.27E-06 2.42E-03 3.OOE-03 2.42E-03 2.42E-03 2.42E-03 0.OOE+00 2.42E-03 AVEG 5.55E-05 4.41E-03 3.03E-02 4.47E-03 4.33E-03 4.36E-03 0.OOE+00 4.38E-03 AGMILK 2.44E-04 3.33E-03 1.17E-01 3.58E-03 2.99E-03 3.08E-03 0.OOE+00 3.19E-03 ACMEAT 7.36E-06 6.34E-04 4.07E-03 6.41E-04 6.23E-04 6.26E-04 0.OOE+00 6.29E-04 ACMILK 2.03E-04 1.75E-03 9.67E-02 1.96E-03 1.46E-03 1.54E-03 0.00E+00 1.63E-03 TGPD 1.21E-05 1.21E-05 1.21E-05 1.21E-05 1.21E-05 1.21E-05 0.00E+00 1.21E-05 TINHL 1.78E-06 2.44E-03 3.16E-03 2.44E-03 2.44E-03 2.44E-03 0.00E+00 2.44E-03 TVEG 5.28E-05 5.03E-03 2.65E-02 5.09E-03 4.96E-03 4.97E-03 0.00E+00 5.00E-03 TGMILK 4.42E-04 4.50E-03 1.85E-01 4.95E-03 3.88E-03 4.01E-03 0.OOE+00 4.22E-03 TCMEAT 6.12E-06 3.80E-04 2.87E-03 3.86E-04 3.71E-04 3.73E-04 0.00E+00 3.76E-04 TCMILK 3.69E-04 2.42E-03 1.52E-01 2.79E-03 1.90E-03 2.01E-03 0.00E+00 2.18E-03 CGPD 1.21E-05 1.21E-05 1.21E-05 1.21E-05 1.21E-05 1.21E-05 0.OOE+00 1.21E-05 CINHL 2.42E-06 2.15E-03 2.96E-03 2.16E-03 2.15E-03 2.15E-03 0.OOE+00 2.15E-03 CVEG 9.82E-05 7.80E-03 4.03E-02 7.86E-03 7.70E-03 7.71E-03 0.OOE+00 7.76E-03 CGMILK 1.07E-03 7.23E-03 3.63E-01 7.93E-03 6.15E-03 6.25E-03 0.OOE+00 6.77E-03 CCMEAT 1.13E-05 4.61E-04 4.22E-03 4.69E-04 4.50E-04 4.51E-04 0.00E+00 4.56E-04 CCMILK 8.94E-04 3.92E-03 3.00E-01 4.49E-03 3.02E-03 3.10E-03 0.00E+00 3.53E-03 IGPD 1.21E-05 1.21E-05 1.21E-05 1.21E-05 1.21E-05 1.21E-05 0.00E+00 1.21E-05 IINHL 1.91E-06 1.24E-03 1.97E-03 1.24E-03 1.24E-03 1.24E-03 0.00E+00 1.24E-03 IGMILK 2.24E-03 1.20E-02 8.76E-01 1.24E-02 9.34E-03 9.43E-03 0.OOE+00 1.05E-02 ICMILK 1.87E-03 6.78E-03 7.27E-01 7.15E-03 4.58E-03 4.66E-03 0.OOE+00 5.54E-03 PERIOD DOSE BY AGEGROUP, ORGAN (mrem)

Agegroup Bone Liver Thyroid Kidney Lung GI-Lli Skin TB ADULT 5.23E-04 1.26E-02 2.51E-01 1.31E-02 1.18E-02 1.20E-02 0.OOE+00 1.23E-02 TEEN 8.84E-04 1.48E-02 3.69E-01 1.57E-02 1.36E-02 1.38E-02 0.OOE+00 1.42E-02 CHILD 2.09E-03 2.16E-02 7.11E-01 2.29E-02 1.95E-02 1.97E-02 0.OOE+00 2.07E-02 INFANT 4.12E-03 2.OOE-02 1.60E+00 2.08E-02 1.52E-02 1.53E-02 0.00E+00 1.73E-02 Date/Time: 04/15/2009 10:16 retdasID: Retdas Page - 3 35 of 104

RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ...........  : 1 All Gas Release Types Period Start Date....: 01/01/2008 00:00 Period End Date ......  : 01/01/2009 00:00 Period Duration (min): 5.270E+05 Coefficient Type ..... :.Historical Unit ..................... 2 Receptor ................ 5 Composite Crit. Receptor - IP Distance (meters) ....  :.0.0 Compass Point .......... 0.0

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

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

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End INFANT THYROID 1.60E+00 31-day 2.25E-01 7.13E+02 3.OOE-01 5.35E+02 Qrtr->End INFANT THYROID 1.60E+00 Quarter 5.63E+00 2.85E+01 7.50E+00 2.14E+01 Year->End INFANT THYROID 1.60E+00 Annual 1.13E+01 1.43E+01 1.50E+01 1.07E+01 Critical Pathway ........  : 3 Grs/Goat/Milk (GMILK)

Major Contributors ......  : 0.0  % or greater to total Nuclide Percentage H-3 9.47E-01 TE-132 6.60E-07 1-131 9.91E+01 1-132 8.22E-05 1-133 8.10E-02

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

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

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End CHILD TBODY Qrtr->End CHILD TBODY 2.07E-0 2 31-day 1.50E-01 1.38E+01 2.OOE-01 1.03E+01 Year->End CHILD TBODY 2.07E-0 2 Quarter 5.25E+00 3.94E-01 7.50E+00 2.76E-01 2.07E-0 2 Annual 1.05E+01 1.97E-01 1.50E+01 1.38E-01 Critical Pathway .......... 2 Vegetation (VEG)

Major Contributors ......  :.0.0  % or greater to total Nuclide Percentage H-3 9.43E+01 TE-132 3.64E-05 1-131 5.80E+00 1-132 6.67E-04 1-133 6.53E-03 Date/Time: 04/15/2009 10:16 retdasID: Retdas Page - 4 36 of 104

RETDAS v3.6.3 <BRA> VSSI GASEOUS RELEASE AND DOSE

SUMMARY

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

Release ID ...........  : 1 All Gas Release Types Period Start Date ....  :.01/01/2008 00:00 Period End Date ...... .. 01/01/2009 00:00 Period Duration (min): 5.270E+05 Coefficient Type ..... .. Historical Unit ..................... 2 Receptor ................ 4 Composite Crit. Receptor - NG Distance (meters) .... .. 0.0 Compass Point .......... 0.0 MAXIMUM PERIOD NG DOSE TO LIMIT (Gamma)

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

Period Dose Type (mrad) Period Limit of Limit Limit of Limit Strt->End Gamma 3.21E-02 Qrtr->End Gamma 3.21E-02 31-day 1.50E-01 2.14E+01 2.OOE-01 1.61E+01 Year->End Gamma 3.21E-02 Quarter 3.75E+00 8.56E-01 5.OOE+00 6.42E-01 Annual 7.50E+00 4.28E-01 1.OOE+01 3.21E-01 Major Contributors ...... .. 0.0  % or greater to total Nuclide Percentage AR-41 1.58E-03 KR-85M 1.17E-03 KR-85 3.88E-03 XE-133M 8.52E-03 KR-88 9.27E+01 XE-131M 3.71E-03 XE-135 4.80E-01 XE-133 6.83E+00

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

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

Period Dose Type (mrad) Period Limit of Limit Limit of Limit Strt->End Beta 2.06E-02 Qrtr->End Beta 2.06E-02 31-day 3.OOE-01 6.86E+00 4.OOE-01 5.15E+00 Year->End Beta 2.06E-02 Quarter 7.50E+00 2.74E-01 1.OOE+01 2.06E-01 Annual 1.50E+01 1.37E-01 2.OOE+01 1.03E-01 Major Contributors ...... .. 0.0  % or greater to total Nuclide Percentage AR-41 1.41E-03 KR-85M 4.78E-03 KR-85 1.12E+00 XE-133M 9.81E-02 KR-88 4.55E+01 XE-131M 6.72E-02 XE-135 1.56E+00 XE-133 5.17E+01 Date/Time: 04/15/2009 10:16 retdasID: Retdas LAST Page - 5 37 of 104

RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

---

(PERIOD BASIS - BY UNIT)

Release ID .............. 1 All Liquid Release Types Period Start Date ..... .. 01/01/2008 00:00 Period End Date ....... .. 01/01/2009 00:00 Period Duration (mins): 5.270E+05 Unit ..................  : 1 MULTIPLE RELEASE POINT MESSAGE Undiluted and Diluted Flowrate(s) and Concentration(s) cannot be combined.

RELEASE DATA Total Release Duration (minutes) ...................................... 1.376E+06 Total Undiluted Volume Released (gallons) ............................ NA Average Undiluted Flowrate (gpm) ..................................... NA Total Dilution Volume (gallons) ...................................... NA Average Dilution Flowrate (gpm) ...................................... NA NUCLIDE DATA Nuclide uCi CO-57 9.15E+01 NB-97 2.10E+00 SN-113 5.84E+01 SB-124 8.52E+02 SB-125 6.28E+03 TE-123M 8.16E+01 CR-51 8.38E+03 MN-54 4.86E+02 FE-59 5.49E+02 CO-58 1.61E+04 CO-60 6.16E+03 ZN-65 8.89E+00 ZR-95 9.05E+02 NB-95 1.60E+03 RU-103 1.33E+02 TE-132 9.81E+00 1-131 4.40E+02 1-132 5.22E+00 CS-134 1.23E+03 CS-137 1.04E+03 Gamma 4.44E+04 AR-41 7.44E+00 D&EG 7.44E+00 H-3 7.05E+08 FE-55 7.17E+03 Date/Time: 04/29/2009 08:37 retdasID: Retdas Page - 1 38 of 104

RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

---

(PERIOD BASIS - BY UNIT)

Release ID .............. 1 All Liquid Release Types Period Start Date ..... .. 01/01/2008 00:00 Period End Date ....... .. 01/01/2009 00:00 Period Duration (mins): 5.270E+05 NUCLIDE DATA Nuclide uCi Beta 7.05E+08 ALPHA 1. 17E+02 Alpha 1. 17E+02 Total 7 . 05E+08 Date/Time: 04/29/2009 08:37 retdasID: Retdas Page - 2 39 of 104

RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

---

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

Release ID .............. 1 All Liquid Release Types Period Start Date ..... :.01/01/2008 00:00 Period End Date .......  :.01/01/2009 00:00 Period Duration (mins): 5.270E+05 Unit .................. 1 Receptor ................. 0 Liquid Receptor PERIOD DOSE BY AGEGROUP, PATHWAY, ORGAN (mrem)

Age/Path Bone Liver Thyroid Kidney Lung GI-Lli Skin TB APWtr 3.13E-05 2.41E-02 2.42E-02 2.41E-02 2.41E-02 2.42E-02 0.OOE+00 2.41E-02 AFWFSp 2.29E-02 5.22E-02 1.09E-02 2.38E-02 1.47E-02 8.45E-02 0.OOE+00 4.19E-02 TPWtr 3.01E-05 1.70E-02 1.71E-02 1.70E-02 1.70E-02 1.70E-02 0.OOE+00 1.70E-02 TFWFSp 2.40E-02 5.10E-02 8.51E-03 2.17E-02 1.32E-02 6.04E-02 0.00E+00 2.59E-02 CPWtr 8.71E-05 3.27E-02 3.28E-02 3.26E-02 3.26E-02 3.26E-02 0.OOE+00 3.26E-02 CFWFSp 2.97E-02 4.39E-02 7.23E-03 1.81E-02 1.07E-02 2.52E-02 0.OOE+00 1.35E-02 IPWtr 8.62E-05 3.21E-02 3.24E-02 3.20E-02 3.20E-02 3.20E-02 0.00E+00 3.20E-02 PERIOD DOSE BY AGEGROUP, ORGAN (mrem)

Agegroup Bone Liver Thyroid Kidney Lung GI-Lli Skin TB ADULT 2.29E-02 7.64E-02 3 .51E-02 4. 79E-02 3. 88E-02 1. 09E-01 0. OOE+00 6. 60E-02 TEEN 2.40E-02 6.80E-02 2.56E-02 3.87E-02 3.02E-02 7. 74E-02 0. OOE+00 4. 29E-02 CHILD 2.97E-02 7.65E-02 4. 01E-02 5. 07E-02 4.33E-02 5.78E-02 0. OOE+00 4.62E-02 INFANT 8.62E-05 3 .21E-02 3.24E-02 3.20E-02 3.20E-02 3.20E-02 0. OOE+00 3.20E-02 Date/Time: 04/29/2009 08:37 retdasID: Retdas Page - 3 40 of 104

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

SUMMARY

REPORT

---

(PERIOD BASIS - BY UNIT)

Release ID .............. 1 All Liquid Release Types Period Start Date ..... .. 01/01/2008 00:00 Period End Date ....... .. 01/01/2009 00:00 Period Duration (mins): 5.270E+05 Unit ..................... 1 Receptor ................. 0 Liquid Receptor MAXIMUM PERIOD DOSE TO LIMIT (Any Organ)

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

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End ADULT GILLI 1. 09E-0 1 31-day 1.50E-01 7.24E+01 2.OOE-01 5.43E+01 Qrtr->End ADULT GILLI 1. 09E-0 1 Quarter 3.75E+00 2.90E+00 5.OOE+00 2.17E+00 Year->End ADULT GILLI 1. 09E-0 1 Annual 7.50E+00 1.45E+00 1.00E+01 1.09E+00 Critical Pathway ........ 1 Fresh Water Fish - Sport (FFSP)

Major Contributors ...... 0.0  % or greater to total Nuclide Percentage H-3 3.13E+01 CR-51 7.39E-02 MN-54 1.79E-01 FE-55 1.04E-01 FE-59 1.24E-01 CO-58 8.28E-01 CO-60 8.43E-01 ZN-65 1.12E-02 ZR-95 1.OOE-02 NB-95 6.57E+01 RU-103 2.27E-03 TE-132 1.99E-02 1-131 7.74E-04 1-132 5.97E-07 CS-134 4.16E-01 CS-137 2.86E-01 MAXIMUM PERIOD DOSE TO LIMIT ( Tot Body))

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

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End ADULT TBODY 6.60E-02 Qrtr->End ADULT TBODY 6.60E-02 31-day 4.50E-02 1.47E+02 6.OOE-02 1.10E+02 Quarter 1.13E+00 5.87E+00 1.50E+00 4.40E+00 Year->End ADULT TBODY 6.60E-02 Annual 2.25E+00 2.93E+00 3.OOE+00 2.20E+00 Critical Pathway .......... 1 Fresh Water Fish - Sport (FFSP)

Major Contributors ...... .. 0.0  % or greater to total Nuclide Percentage H-3 5.15E+01 CR-51 4.85E-04 Date/Time: 04/29/2009 08:37 retdasID: Retdas Page - 4 41 of 104

RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

---

(PERIOD BASIS - BY UNIT)

Release ID .............. 1 All Liquid Release Types Period Start Date ..... .. 01/01/2008 00:00 Period End Date ....... .. 01/01/2009 00:00 Period Duration (mins): 5.270E+05 Major Contributors ...... .. 0.0  % or greater to total Nuclide Percentage MN-54 1.83E-02 FE-55 6.99E-02 FE-59 2.36E-02 CO-58 1.51E-01 CO-60 1.64E-01 ZN-65 1.33E-02 ZR-95 3.52E-06 NB-95 9.59E-03 RU-103 1.38E-05 TE-132 6.49E-04 1-131 2.77E-03 1-132 1.83E-06 CS-134 3.20E+01 CS-137 1.59E+01 Date/Time: 04/29/2009 08:37 retdasID: Retdas LAST Page - 5 42 of 104

RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

---

(PERIOD BASIS - BY UNIT)

Release ID .............. 1 All Liquid Release Types Period Start Date ..... .. 01/01/2008 00:00 Period End Date ....... .. 01/01/2009 00:00 Period Duration (mins): 5.270E+05 Unit ..................  : 2 MULTIPLE RELEASE POINT MESSAGE Undiluted and Diluted Flowrate(s) and Concentration(s) cannot be combined.

RELEASE DATA Total Release Duration (minutes) ..................................... 1.376E+06 Total Undiluted Volume Released (gallons) ............................ NA Average Undiluted Flowrate (gpm) ................................... NA Total Dilution Volume (gallons) ...................................... NA Average Dilution Flowrate (gpm) ...................................... NA NUCLIDE DATA Nuclide uCi CO-57 9.15E+01 NB-97 2.10E+00 SN-113 5.84E+01 SB-124 8.52E+02 SB-125 6.28E+03 TE-123M 8.16E+01 CR-51 8.38E+03 MN-54 4.86E+02 FE-59 5.49E+02 CO-58 1.61E+04 CO-60 6.16E+03 ZN-65 8.89E+00 ZR-95 9.05E+02 NB-95 1.60E+03 RU-103 1.33E+02 TE-132 9.81E+00 1-131 4.40E+02 1-132 5.22E+00 CS-134 1.23E+03 CS-137 1.04E+03 Gamma 4.44E+04 AR-41 7.44E+00 D&EG 7.44E+00 H-3 7.05E+08 FE-55 7.17E+03 Date/Time: 04/29/2009 08:39 retdasID: Retdas Page - 1 43 of 104

RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

---

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

Release ID .............. 1 All Liquid Release Types Period Start Date ..... .. 01/01/2008 00:00 Period End Date ....... .. 01/01/2009 00:00 Period Duration (mins): 5.270E+05 NUCLIDE DATA Nuclide uCi Beta 7. 05E+08 ALPHA 1. 17E+02 Alpha 1. 17E+02 Total 7 .05E+08 Date/Time: 04/29/2009 08:39 retdasID: Retdas Page - 2 44 of 104

RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

---

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

Release ID...............1I All Liquid Release Types Period Start Date ....... 01/01/2008 00:00 Period End Date ......... 01/01/2009 00:00 Period Duration (mins): 5.270E+05 Unit..................... 2 Receptor................. 0 Liquid Receptor

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

Age/Path Bone Liver Thyroid Kidney Lung GI-Lli Skin TB APWtr 3.13E-05 2.41E-02 2. 42E-02 2.41E-02 2.41E-02 2. 42E-02 0 . 00E+00 2. 41E-02 AFWFSp 2.29E-02 5 22E-02 1.09E-02 2.38E-02 1.47E-02 8. 45E-02 0 OOE+00 4. 19E-02 TPWtr 3. 01E-05 1. 70E-02 1.71E-02 1.70E-02 1.70E-02 1.70E-02 0. OOE+00 1. 70E-02 TFWFSp 2. 40E-02 5. lOE-02 8. 51E-03 2. 17E-02 1.32E-02 6. 04E-02 0. OOE+00 2 59E-02 CPWtr 8.71E-05 3. 27E-02 3. 28E-02 3. 26E-02 3. 26E-02 3. 26E-02 0. OOE+00 3 26E-02 CFWFSp 2. 97E-02 4. 39E-02 7 .23E-03 1.81E-02 1. 07E-02 2. 52E-02 0. OOE+00 1. 35E-02 IPWtr 8. 62E-05 3 .21E-02 3 .24E-02 3. 20E-02 3 .20E-02 3. 20E-02 0. OOE+00 3 20E-02 PERIOD DOSE BY AGEGROUP, ORGAN (mrem)

Agegroup Bone Liver Thyroid Kidney Lung GI-Lli Skin TB ADULT 2.29E-02 7.64E-02 3.51E-02 4.79E-02 3.88E-02 1.09E-01 0.OOE+00 6.60E-02 TEEN 2.40E-02 6.80E-02 2.56E-02 3.87E-02 3.02E-02 7.74E-02 0.OOE+00 4.29E-02 CHILD 2.97E-02 7.65E-02 4.01E-02 5.07E-02 4.33E-02 5.78E-02 0.OOE+00 4.62E-02 INFANT 8.62E-05 3.21E-02 3.24E-02 3.20E-02 3.20E-02 3.20E-02 0.OOE+00 3.20E-02 Date/Time: 04/29/2009 08:39 retdasID: Retdas Page - 3 45 of 104

RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

---

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

Release ID ............ 1 All Liquid Release Types Period Start Date ..... 01/01/2008 00:00 Period End Date ....... 01/01/2009 00:00 Period Duration (mins) 5.270E+05 Unit .................. :2 Receptor .............. 0 Liquid Receptor

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

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

Period Group Organ (mrem) Period Limit of Limit Limit of Limit Strt->End ADULT GILLI 1.09E-0 1 31-day 1.50E-01 7.24E+01 2.OOE-01 5.43E+01 Qrtr->End ADULT GILLI 1. 09E-0 1 Quarter 3.75E+00 2.90E+00 5.OOE+00 2.17E+00 Year->End ADULT GILLI 1 . 09E-0 1 Annual 7.50E+00 1.45E+00 1.OOE+01 1.09E+00 Critical Pathway ....... 1 Fresh Water Fish - Sport (FFSP)

Major Contributors ..... 0.0  % or greater to total Nuclide Percentage H-3 3.13E+01 CR-51 7.39E-02 MN-54 1.79E-01 FE-55 1.04E-01 FE-59 1.24E-01 CO-58 8.28E-01 CO-60 8.43E-01 ZN-65 1.12E-02 ZR-95 1.OOE-02 NB-95 6.57E+01 RU-103 2.27E-03 TE-132 1.99E-02 1-131 7.74E-04 1-132 5.97E-07 CS-134 4.16E-01 CS-137 2.86E-01

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

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

Period Group Organ (mrem) Period Limit of Limit Limit -of Limit Strt--End ADULT TBODY Qrtr-*End ADULT TBODY 6.60E-0 2 31-day 4.50E-02 1.47E+02 6.OOE-02 1.10E+02 6.60E-0 2 Quarter 1.13E+00 5.87E+00 1.50E+00 4.40E+00 Year-SEnd ADULT TBODY 6. 60E-0 2 Annual 2.25E+00 2.93E+00 3.OOE+00 2.20E+00 Critical Pathway .......... 1 Fresh Water Fish - Sport (FFSP)

Major Contributors ...... .. 0.0 % or greater to total Nuclide Percentage H-3 5.15E+01 CR-51 4.85E-04 Date/Time: 04/29/2009 08:39 retdasID: Retdas Page - 4 46 of 104

RETDAS v3.6.3 <BRA> VSSI LIQUID RELEASE AND DOSE

SUMMARY

REPORT

---

(PERIOD BASIS - BY UNIT)

Release ID .............. 1 All Liquid Release Types Period Start Date ..... :.01/01/2008 00:00 Period End Date .......  :.01/01/2009 00:00 Period Duration (mins): 5.270E+05 Major Contributors ...... .. 0.0  % or greater to total Nuclide Percentage MN-54 1.83E-02 FE-55 6.99E-02 FE-59 2.36E-02 CO-58 1.51E-01 CO-60 1.64E-01 ZN-65 1.33E-02 ZR-95 3.52E-06 NB-95 9.59E-03 RU-103 1.38E-05 TE-132 6.49E-04 1-131 2.77E-03 1-132 1.83E-06 CS-134 3.20E+01 CS-137 1.59E+01 Date/Time: 04/29/2009 08:39 retdasID: Retdas LAST Page - 5 47 of 104

BRAIDWOOD NUCLEAR POWER STATION RADIOACTIVE EFFLUENT RELEASE REPORT FOR 2008 UNIT 1 AND 2 (Docket Numbers 50-456 and 50-457)

ATTACHMENT 1 Tables 7-11 Wind Direction and Stability Classes 48 of 104

Braidwood Generating Station Period of Record: January - March 2008 Stability Class - Extremely Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-2-4 > 24 Total N 0 0 NNE 8 8 NE 3 4 ENE 0 1 E 3 4 ESE 3 3 SE 2 2 SSE 0 0 S 0 0 SSW 0 2 SW 3 6 WSW 2 3 W 4 16 WNW 15 26 NW 9 14 NNW 6 8 Variable 0 0 Total 0 19 58 13 7 0 97 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 stabi lity classes: 20 49 of 104

Braidwood Generating Station Period of Record: January - March 2008 Stability Class - Moderately Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 N 0 0 0 0 0 0 0 NNE 3 2 0 0 5 NE 0 2 0 1 0 0 3 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 1 1 0 0 0 2 SE 0 0 1 0 0 0 1 SSE 0 0 1 1 0 0 2 S 0 0 0 0 0 0 0 SSW 0 1 0 1 0 0 2 SW 0 0 0 0 0 0 0 WSW 0 1 2 1 0 0 4 W 0 3 6 0 0 0 9 WNW 0 4 3 2 0 0 9 NW 0 5 1 0 0 0 6 NNW 0 0 5 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 0 17 23 8 0 0 48 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: 20 50 of 104

Braidwood Generating Station Period of Record: January - March 2008 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 NNE 6 NE 3 ENE 1 E 3 ESE 5 SE 3 SSE 6 S 4 SSW 9 SW 6 WSW 10 W 16 WNW 14 NW 3 NNW 5 Variable 0 Total 0 29 51 14 4 0 98 Hours of calm in this. stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability cl asses: 20 51 of 104

Braidwood Generating Station Period of Record: January - March 2008 Stability Class - Neutral - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 15 40 4 0 0 59 NNE 5 24 30 3 0 0 62 NE 9 24 39 5 0 0 77 ENE 10 47 18 0 0 0 75 E 3 42 7 0 0 0 52 ESE 1 18 24 0 0 0 43 SE 0 12 21 2 0 0 35 SSE 0 15 54 11 0 0 80 S 0 6 48 68 7 0 129 SSW 0 11 28 29 6 0 74 SW 1 18 33 10 5 0 67 WSW 1 32 21 1 0 0 55 W 5 36 56 32 11 0 140 WNW 3 30 94 31 5 0 163 NW 2 29 28 5 0 0 64 NNW 0 21 28 8 0 0 57 Variable 0 0 0 0 0 0 0 Total 40 380 569 209 34 0 1232 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 20 52 of 104

Braidwood Generating Station Period of Record: January - March 2008 Stability Class - Slightly Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 12 0 0 0 0 17 NNE 3 13 7 0 0 0 23 NE 6 6 2 5 0 0 19 ENE 7 7 3 2 0 0 19 E 8 18 2 0 0 0 28 ESE 5 17 6 0 0 0 28 SE 3 11 17 1 0 0 32 SSE 3 14 25 1 2 0 45 S 1 8 35 21 1 0 66 SSW 1 10 14 10 4 0 39 SW 5 6 7 0 0 0 18 WSW 4 21 13 0 0 0 '38 W 11 13 7 5 0 0 36 WNW 20 23 12 1 0 0 56 NW 16 29 3 0 0 0 48 NNW 8 13 8 0 0 0 29 Variable 0 0 0 0 0 0 0 Total 106 221 161 46 7 0 541 Hours of calm in this stability class: 11 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stabi lity classes: 20 53 of 104

Braidwood Generating Station Period of Record: January - March 2008 Stability Class - Moderately Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph) wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 1 2 NNE 1 2 3 NE 2 0 2 ENE 4 0 4 E 2 0 2 ESE 1 2 3 SE 0 4 4 SSE 0 0 0 S 0 2 2 SSW 3 3 7 SW 3 1 4 WSW 2 15 17 W 19 7 26 WNW 14 5 19 NW 2 2 4 NNW 2 0 2 Variable 0 0 0 Total 56 44 1 0 0 0 101 Hours of calm in this stability class: 13 Hours of missing wind measurements in this stability class: 4 Hours of missing stability measurements in all stability cl asses: 20 54 of 104

Braidwood Generating Station Period of Record: January - March 2008 Stability Class - Extremely Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 N 0 1 0 0 0 NNE 0 0 0 0 0 NE 0 0 0 0 0 ENE 0 0 0 0 0 E 0 0 0 0 0 ESE 0 0 0 0 0 SE 0 0 0 0 0 SSE 0 0 0 0 0 0 S 0 0 0 0 SSW 0 2 0 0 0 SW 0 3 0 0 0 WSW 0 0 0 0 0 W 0 1 0 0 0 WNW 0 2 0 0 0 NW 0 0 0 0 0 NNW 0 0 0 0 0 Variable 0 0 Total 0 0 0 0 9 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 cl asses: 20 55 of 104

Braidwood Generating Station Period of Record: January - March 2008 Stability Class - Extremely Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 1 NNE 1 1 NE 3 11 ENE 0 1 E 0 0 ESE 5 6 SE 0 3 SSE 0 0 S 0 0 SSW 0 2 SW 2 5 WSW 0 1 W 6 15 WNW 11 26 NW 6 18 NNW 3 7 Variable 0 0 Total 0 3 40 38 3 13 97 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 20 56 of 104

Braidwood Generating Station Period of Record: January - March 2008 Stability Class - Moderately Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 1 0 0 0 1 NE 0 0 4 0 3 0 7 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 1 0 0 0 1 SE 0 0 1 1 0 0 2 SSE 0 0 1 0 0 0 1 S 0 0 0 0 0 1 1 SSW 0 0 1 0 0 0 1 SW 0 0 0 0 1 0 1 WSW 0 0 0 0 0 0 0 W 0 2 3 5 0 1 11 WNW 0 1 3 2 0 2 8 NW 0 3 5 0 0 0 8 NNW 0 1 3 2 0 0 6 Variable 0 0 0 0 0 0 0 Total 0 7 23 10 4 4 48 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: 20 57 of 104

Braidwood Generating Station Period of Record: January - March 2008 Stability Class - Slightly Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 5 NNE 0 0 NE 0 8 ENE 0 1 E 0 1 ESE 0 5 SE 0 6 SSE 0 6 S 0 4 SSW 1 6 SW 0 1 8 WSW 0 0 7 W 0 3 19 WNW 0 1 4 5 0 1 11 0 1 5 2 0 1 9 NNW 0 0 1 1 0 0 2 Variable 0 0 0 0 0 0 0 Total 0 12 34 34 11 7 98 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability cl asses: 20 58 of 104

Braidwood Generating Station Period of Record: January - March 2008 Stability Class - Neutral - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 6 18 25 0 0 49 NNE 7 25 26 5 0 64 NE 9 20 34 13 0 80 ENE 14 20 16 0 0 51 E 10 36 12 0 0 59 ESE 4 19 24 10 0 57 SE 2 11 24 5 2 44 SSE 0 16 26 11 0 53 S 1 18 37 63 25 144 SSW 5 6 21 27 16 75 SW 9 19 27 4 8 67 WSW 22 21 10 1 3 58 W 17 20 33 24 9 103 WNW 9 23 80 52 26 192 NW 7 24 30 15 4 82 NNW 9 15 26 4 0 54 Variable 0 0 0 0 0 0 Total 12 131 311 451 234 93 1232 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability cl asses: 20 59 of 104

Braidwood Generating Station Period of Record: January - March 2008 Stability Class - Slightly Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 12 1 0 0 22 NNE 16 6 0 0 24 NE 7 3 4 1 20 ENE 8 2 2 18 E 13 4 0 0 23 ESE 6 20 3 0 29 SE 11 5 9 0 28 SSE 10 25 8 0 46 S 5 20 21 13 61 SSW 8 15 10 13 51 SW 5 7 2 0 21 WSW 13 7 0 0 27 W 14 15 4 0 39 WNW 14 15 3 4 42 NW 36 18 2 0 69 NNW 20 11 0 0 33 Variable 0 0 0 0 0 Total 17 64 198 174 68 32 553 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: 20 60 of 104

Braidwood Generating Station Period of Record: January - March 2008 Stability Class - Moderately Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 2 0 0 0 3 NNE 0 0 4 0 0 0 4 NE 2 0 2 1 0 0 5 ENE 0 3 1 0 0 0 4 E 0 3 0 0 0 0 3 ESE 0 0 2 0 0 0 2 SE 1 1 0 0 0 0 2 SSE 1 1 1 5 0 0 8 S 1 0 0 1 0 0 2 SSW 0 1 1 1 0 0 3 SW 0 0 1 0 0 0 1 WSW 1 1 7 3 0 0 12 W 0 1 7 2 0 0 10 WNW 1 4 25 1 0 0 31 NW 0 2 15 6 0 0 23 NNW 0 0 5 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 7 18 73 20 0 0 118 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 20 61 of 104

Braidwood Generating Station Period of Record: January - March 2008 Stability Class - Extremely Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0. 0 0 NNE 0 0 1 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 1 0 0 0 0 0 1 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 1 0 0 0 0 0 1 SSW 0 0 1 0 0 0 1 SW 0 0 2 0 0 0 2 WSW 0 0 1 0 0 0 1 W 0 1 0 0 0 0 1 WNW 0 0 0 0 0 0 0 NW 0 1 1 0 0 0 2 NNW 0 2 1 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 2 4 7 0 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: 20 62 of 104

Braidwood Generating Station Period of Record: April - June 2008 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 1 0 0 0 2 NNE 0 0 0 0 0 0 0 NE 0 5 3 0 0 0 8 ENE 1 4 4 0 0 0 9 E 0 2 2 0 0 0 4 ESE 0 3 2 0 0 0 5 SE 0 3 8 1 0 0 12 SSE 0 1 5 3 0 0 9 S 0 0 1 3 4 0 8 SSW 0 2 2 8 1 0 13 SW 0 0 2 1 0 0 3 WSW 0 2 8 9 0 0 19 W 0 6 13 7 1 0 27 WNW 0 4 12 0 0 0 16 NW 0 6 19 0 0 0 25 NNW 0 7 20 1 0 0 28 Variable 0 0 0 0 0 0 0 Total 1 46 102 33 6 0 188 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 63 of 104

Braidwood Generating Station Period of Record: April - June 2008 Stability Class - Moderately Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 5 2 0 0 0 7 NNE 0 4 1 0 0 0 5 NE 0 1 3 0 0 0 4 ENE 3 3 0 0 0 0 6 E 0 3 0 0 0 0 3 ESE 0 5 1 0 0 0 6 SE 0 2 3 0 0 0 5 SSE 0 3 6 2 0 0 11 S 0 2 3 6 2 0 13 SSW 0 0 3 3 5 0 11 SW 0 2 4 2 1 0 9 WSW 0 3 9 0 0 0 12 W 0 3 6 4 0 0 13 WNW 0 5 4 0 0 0 9 NW 0 6 3 0 0 0 9 NNW 0 6 5 0 0 0 11 Variable 0 0 0 0 0 0 0 Total 3 53 53 17 8 .0 134 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability.measurements in all stability classes: 0 64 of 104

Braidwood Generating Station Period of Record: April - June 2008 Stability Class - Slightly Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 3 2 0 0 0 5 NNE 0 4 4 0 0 0 8 NE 0 2 4 0 0 0 6 ENE 0 5 0 0 0 0 5 E 1 0 0 0 0 0 1 ESE 1 2 0 0 0 0 3 SE 1 7 3 3 0 0 14 SSE 1 5 2 0 0 0 8 S 2 1 10 3 1 0 17 SSW 1 2 5 6 0 1 15 SW 0 2 5 2 0 0 9 WSW 0 5 7 2 0 0 14 W 0 3 4 0 0 0 7 WNW 0 4 5 0 0 0 9 NW 0 5 2 0 0 0 7 NNW 0 5 3 0 0 0 8 Variable 0 0 0 0 0 0 0 Total 7 55 56 16 1 1 136 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability classes: 0 65 of 104

Braidwood Generating Station Period of Record: April - June 2008 Stability Class - Neutral - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 7 15 3 1 30 NNE 20 35 4 3 64 NE 29 36 0 0 66 ENE 19 23 0 0 47 E 11 5 0 0 18 ESE 3 2 5 0 15 SE 10 8 2 0 25 SSE 13 25 4 0 43 S 12 35 27 6 80 SSW 9 25 17 14 71 SW 15 32 18 1 66 WSW 10 30 9 0 54 W 14 20 21 2 58 WNW 13 18 7 0 43 NW 20 18 1 0 42 NNW 17 16 2 0 36 Variable 0 0 0 0 0 Total 42 222 343 120 27 4 758 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 4 Hours of missing stability measurements in all stability classes: 0 66 of 104

Braidwood Generating Station Period of Record: April - June 2008 Stability Class - Slightly Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 6 14 3 0 0 0 23 NNE 3 24 3 0 0 0 30 NE 10 9 3 0 0 0 22 ENE 19 13 1 0 0 0 33 E 26 12 1 0 0 0 39 ESE 12 33 10 5 0 0 60 SE 8 42 23 4 0 0 77 SSE 4 25 26 5 0 0 60 S 3 15 59 23 0 0 100 SSW 3 9 30 16 4 0 62 SW 1 21 19 2 0 0 43 WSW 4 39 7 0 0 0 50 W 6 20 2 1 0 0 29 WNW 9 14 1 0 0 0 24 NW 5 12 2 0 0 0 19 NNW 6 10 4 0 0 0 20 Variable 0 0 0 0 0 0 0 Total 125 312 194 56 4 0 691 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 4 Hours of missing stability measurements in all stability classes: 0 67 of 104

Braidwood Generating Station Period of Record: April - June 2008 Stability Class - Moderately Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 1 3 NNE 4 0 4 NE 6 1 7 ENE 6 1 7 E 10 0 10 ESE 11 7 18 SE 8 3 11 SSE 4 1 5 S 0. 2 2 SSW. 1 5 10 SW 4 7 12 WSW 8 16 25 W 24 8 32 WNW 16 0 16 NW 8 1 9 NNW 3 1 4 Variable 0 0 0 Total 115 54 0 175 Hours of calm in this stability class: 3 Hours of missing wind measurements in this stability class: 7 Hours of missing stability measurements in all stability classes: 0 68 of 104

Braidwood Generating Station Period of Record: April - June 2008 Stability Class - Extremely Stable - 199Ft-3OFt Delta-T (F) winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 0 0 0 0 0 3 NNE 1 0 0 0. 0 0 1 NE 1 0 0 0 0 0 1 ENE 4 0 0 0 0 0 4 E 7 0 0 0 0 0 7 ESE 2 0 0 0 0 0 2 SE 3 0 0 0 0 0 3 SSE 0 0 0 0 0 0 0 S 4 0 0 0 0 0 4 SSW 2 1 0 0 0 0 3 SW 1 0 0 0 0 0 1 WSW 7 4 0 0 0 0 11 W 12 1 0 0 0 0 13 WNW 7 0 0 0 0 0 7 NW 3 0 0 0 0 0 3 NNW 4 0 0 0 0 0 4 Variable 0 0 0 0 0 0 0 Total 61 6 0 0 0 0 67 Hours of calm in this stability class: 8 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 0 69 of 104

Braidwood Generating Station Period of Record: April - June 2008 Stability Class - Extremely Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 4 1 0 0 6 NNE 0 0 1 0 0 0 1 NE 0 1 1 1 0 0 3 ENE 0 0 9 2 0 0 11 E 0 0 3 0 0 0 3 ESE 0 1 2 4 0 0 7 SE 0 1 1 7 0 1 10 SSE 0 1 2 4 0 0 7 S 0 0 2 1 3 2 8 SSW 0 0 0 0 4 9 13 SW 0 0 4 0 1 0 5 WSW 0 0 2 2 1 0 5 W 0 1 8 8 10 2 29 WNW 0 2 5 12 4 0 23 NW 0 2 5 15 3 0 25 NNW 0 2 10 15 3 0 30 Variable 0 0 0 0 0 0 0 Total 0 12 59 72 29 14 186 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 0 70 of 104

Braidwood Generating Station Period of Record: April - June 2008 Stability Class - Moderately Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 3 2 0 0 0 5 NNE 0 1 2 1 0 0 4 NE 0 2 1 1 0 0 4 ENE 0 0 2 3 0 0 5 E 0 0 2 1 0 0 3 ESE 0 0 1 1 0 0 2 SE 1 1 3 2 0 0 7 SSE 0 1 2 3 0 0 6 S 0 1 5 0 2 3 11 SSW 0 3 2 6 4 15

'0 0 1 1 2 0 5 9 SW WSW 0 0 6 4 0 0 10 W 0 1 5 4 1 0 11 3 3 3 2 1 12 WNW 0 0 3 4 5 0 0 12 NNW 0 3 5 4 0 0 12 Variable 0 0 0 0 0 0 0

Total 1 20 47 36 11 13 128 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 8 Hours of missing stability measurements in all stability classes: 0 71 of 104

Braidwood Generating Station Period of Record: April - June 2008 Stability Class - Slightly Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 3 1 0 0 4 NNE 0 1 4 2 0 0 7 NE 0 1 3 4 0 0 8 ENE 0 0 2 1 0 0 3 E 0 0 3 0 0 0 3 ESE 0 3 0 0 0 0 3 SE 0 2 3 1 0 3 9 SSE 1 2 5 2 0 0 10 S 1 1 3 4 0 1 10 SSW 0 0 3 4 6 0 13 SW 0 2 4 1 2 5 14 WSW 0 1 6 2 1 0 10 W 0 0 5 3 2 0 10 WNW 0 4 1 6 0 0 11 NW 0 3 3 3 1 0 10 NNW 0 3 4 3 0 0 10 Variable 0 0 0 0 0 0 0 Total 2 23 52 37 12 9 135 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 4 Hours of missing stability measurements in all stability classes: 0 72 of 104

Braidwood Generating Station Period of Record: April - June 2008 Stability Class - Neutral - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph) wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 8 10 8 2 2 31 NNE 1 6 5 24 2 4 42 NE 0 4 24 34 7 1 70 ENE 1 4 16 31 3 0 55 E 1 4 11 5 3 0 24 ESE 1 0 6 1 2 0 10 SE 1 6 1 4 2 6 20 SSE 1 9 8 8 1 0 27 S 0 3 12 27 21 5 68 SSW 1 8 9 15 20 24 77 SW 1 4 7 26 8 16 62 WSW 1 2 23 20 16 2 64 W 0 3 13 15 8 6 45 1 8 14 16 17 4 60 0 11 14 23 7 1 56 NNW 0 6 12 16 4 0 38 Variable 0 0 0 0 0 0 0 Total 11 86 185 273 123 71 749 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 14 Hours of missing stability measurements in all stability classes: 0 73 of 104

Braidwood Generating Station Period of Record: April - June 2008 Stability Class - Slightly Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 7 12 3 0 0 22 NNE 0 4 14 5 0 0 23 NE 1 2 24 4 0 0 31 ENE 1 6 14 5 0 0 26 E 0 7 20 1 0 0 28 ESE 0 1 14 14 2 3 34 SE 0 3 23 23 4 8 61 SSE 1 2 10 42 10 0 65 S 1 5 16 30 22 2 76 SSW 1 3 11 34 39 11 99 SW 0 3 4 23 19 3 52 WSW 0 5 21 15 1 0 42 W 0 1 25 14 1 0 41 WNW 0 2 17 4 0 0 23 NW 0 6 21 5 1 0 33 NNW 0 3 14 4 0 0 21 Variable 0 0 0 0 0 0 0 Total 5 60 260 226 99 27 677 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 19 Hours of missing stability measurements in all stability classes: 0 74 of 104

Braidwood Generating Station Period of Record: April - June 2008 Stability Class - Moderately Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 3 5 2 0 0 10 NNE 0 3 0 0 0 0 3 NE 0 1 1 1 0 0 3 ENE 3 0 5 1 0 0 9 E 1 2 2 0 0 0 5 ESE 0 2 4 1 0 0 7 SE 0 3 7 6 0 0 16 SSE 0 2 6 2 0 0 10 S 0 3 1 0 0 0 4 SSW 0 1 3 0 0 0 4 SW 0 2 3 2 0 0 7 WSW 0 2 4 9 0 0 15 W 0 2 6 8 0 0 16 WNW 0 4 19 8 0 0 31 NW 0 8 17 4 0 0 29 NNW 0 2 7 0 0 0 9 Variable 0 0 0 0 0 0 0 Total 4 40 90 44 0 0 178 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 7 Hours of missing stability measurements in all stability classes: 0 75 of 104

Braidwood Generating Station Period of Record: April - June 2008 Stability Class - Extremely Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 N 0 0 0 0 0 3 0 NNE 0 0 0 3 0 4 0 NE 0 0 0 4 0 0 0 ENE 1 0 0 1 0 2 0 E 0 0 0 2 1 2 0 ESE 0 0 0 3 0 0 0 SE 0 0 0 0 6 0 0 SSE 0 0 0 6 1 0 0 S 0 0 0 1 1 1 0 SSW 1 0 0 3 SW 0 4 1 1 0 0 6 WSW 1 2 1 0 0 0 4 W 0 1 2 3 0 0 6 WNW 0 4 4 6 0 0 14 NW 0 4 6 2 0 0 12 NNW 0 2 6 2 0 0 10 Variable 0 0 0 0 0 0 0 Total 3 26 32 14 0 0 75 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 0 76 of 104

Braidwood Generating Station Period of Record: July - September 2008 Stability Class - Extremely Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 15 2 0 0 0 17 NNE 0 13 6 0 0 0 19 NE 0 20 16 0 0 0 36 ENE 2 23 0 0 0 0 25 E 1 13 0 0 0 0 14 ESE 0 7 0 0 0 0 7 SE 0 16 2 0 0 0 18 SSE 0 19 4 0 0 0 23 S 0 12 13 0 0 0 25 SSW 0 5 8 3 0 0 16 SW 0 5 22 5 0 0 32 WSW 0 22 18 1 0 0 41 W 0 36 21 0 0 0 57 WNW 0 14 4 0 0 0 18 NW 0 15 6 0 0 0 21 NNW 0 12 12 0 0 0 24 Variable 0 0 0 0 0 0 0 Total 3 247 134 9 0 0 393 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 6 77 of 104

Braidwood Generating Station Period of Record: July - September 2008 Stability Class - Moderately Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 8 0 0 0 0 8 NNE 0 7 0 0 0 0 7 NE 2 11 0 0 0 0 13 ENE 4 3 0 0 0 0 7 E 3 3 0 0 0 0 6 ESE 0 7 0 0 0 0 7 SE 1 5 1 0 0 0 7 SSE 0 5 1 0 0 0 6 S

1 6 5 0 0 0 12 SSW 1 5 4 1 0 0 11 SW 0 4 4 0 0 0 8 WSW 0 2 6 0 0 0 8 W 0 12 7 0 0 0 19 1 4 0 0 0 0 5 NW 1 2 0 0 0 0 3 NNW 2 7 2 0 0 0 11 Variable 0 0 0 0 0 0 0 Total 16 91 30 1 0 0 138 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 6 78 of 104

Braidwood Generating Station Period of Record: July - September 2008 Stability Class - Slightly Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

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

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 11 68 16 3 0 0 98 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: 6 79 of 104

Braidwood Generating Station Period of Record: July - September 2008 Stability Class - Neutral - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 15 9 30 NNE 2 20 19 41 NE 9 27 3 39 ENE 5 9 0 14 E 6 6 0 12 ESE 7 2 0 9 SE 10 17 0 27 SSE 3 26 5 34 S 1 16 10 27 SSW 1 7 21 30 SW 1 27 31 61 WSW 2 30 8 41 W 3 25 2 30 WNW 13 16 6 35 NW 6 26 5 37 NNW 3 22 3 28 Variable 0 0 0 0 Total 75 291 122 7 0 0 495 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 6 80 of 104

Braidwood Generating Station Period of Record: July - September 2008 Stability Class - Slightly Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 3 1 7 NNE 9 22 1 32 NE 18 15 1 34 ENE 30 13 0 43 E 28 4 0 32 ESE 13 17 0 30 SE 9 25 4 38 SSE 5 30 3 38 S 3 27 8 38 SSW 2 20 9 31 SW 1 38 3 42 WSW 8 56 1 65 W 13 13 1 27 WNW 21 4 0 25 NW 13 10 0 23 NNW 7 14 0 22 Variable 0 0 0 0 Total 183 311 32 0 527 Hours of calm in this stability class: 4 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 6 81 of 104

Braidwood Generating Station Period of Record: July - September 2008 Stability Class - Moderately Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 16 2 0 0 0 18 NNE 15 5 0 0 0 20 NE 14 0 0 0 0 14 ENE 26 0 1 0 0 27 E 42 3 0 0 0 45 ESE 29 10 0 0 0 39 SE 10 6 0 0 0 16 SSE 16 6 0 0 0 22 S 5 5 0 0 0 10 SSW 5 13 0 0 0 18 SW 5 5 2 0 0 12 WSW 9 24 0 0 0 33 W 20 3 0 0 0 23 WNW 20 2 0 0 0 22 NW 16 2 0 0 0 18 NNW 11 3 0 0 0 14 Variable 0 0 0 0 0 0 Total 259 89 3 0 0 0 351 Hours of calm in this stability class: 18 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability classes: 6 82 of 104

Braidwood Generating Station Period of Record: July - September 2008 Stability Class - Extremely Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 3 NNE 6 6 NE 7 7 ENE 8 8 E 23 23 ESE 11 11 SE 1 2 SSE 3 3 S 1 1 SSW 0 0 SW 1 1 WSW 9 10 W 21 21 WNW 20 20 NW 7 7 NNW 7 7 Variable 0 0 Total 127 3 0 0 0 0 130 Hours of calm in this stability class: 39 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 6 83 of 104

Braidwood Generating Station Period of Record: July - September 2008 Stability Class - Extremely Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 9 13 0 0 0 22 NNE 0 7 3 0 0 0 10 NE 0 8 14 16 0 0 38 ENE 0 9 15 0 0 0 24 E 0 8 8 0 0 0 16 ESE 0 6 2 0 0 0 8 SE 0 6 12 1 0 0 19 SSE 0 7 13 2 0 0 22 S 0 6 9 6 0 0 21 SSW 0 1 5 9 1 0 16 SW 0 1 15 11 4 0 31 WSW 0 7 24 6 4 0 41 W 0 10 34 10 0 0 54 WNW 0 5 9 6 4 0 24 NW 0 8 13 8 0 0 29 NNW 0 2 14 1 0 0 17 Variable 0 0 0 0 0 0 0 Total 0 100 203 76 13 0 392 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability cliasses: 6 84 of 104

Braidwood Generating Station Period of Record: July - September 2008 Stability Class - Moderately Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph) wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 7 NNE 2 0 0 8 NE 1 0 0 14 ENE 1 0 0 5 E 1 0 0 7 ESE 0 0 0 5 SE 0 0 0 7 SSE 0 0 0 9 S 0 0 0 8 SSW 0 0 0 9 SW 0 2 7 2 1 0 12 WSW 0 2 4 3 0 0 9 W 0 3 12 1 0 0 16 0 3 4 0 0 0 7 NW 1 3 3 1 0 0 8 NNW 0 2 3 0 0 6 Variable 0 0 0 0 0 0 0 Total 6 49 64 17 1 0 137 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 6 85 of 104

Braidwood Generating Station Period of Record: July - September 2008 Stability Class - Slightly Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 NNE 6 NE 7 ENE 6 E 4 ESE 5 SE 7 SSE 11 S 6 SSW 3 SW 11 WSW 6 W 7 WNW 5 NW 3 NNW 6 Variable 0 Total 5 43 35 11 4 0 98 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: 6 86 of 104

Braidwood Generating Station Period of Record: July - September 2008 Stability Class - Neutral - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 7 12 5 28 NNE 6 9 10 26 NE 9 18 17 46 ENE 8 5 0 16 E 5 6 0 13 ESE 3 4 0 9 SE 6 11 1 21 SSE 5 20 11 39 S 1 14 7 22 SSW 2 6 26 40 SW 4 26 18 56 WSW 9 20 6 36 W 7 23 2 35 WNW 9 17 11 39 NW 13 21 8 43

• NNW 7 14 2 25 Variable 0 0 0 0 Total 25 101 226 124 18 0 494 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability cl asses: 6 87 of 104

Braidwood Generating Station Period of Record: July - September 2008 Stability Class - Slightly Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 7 2 1 0 0 10 NNE 1 1 8 1 0 0 11 NE 1 7 37 5 0 0 50 ENE 1 10 29 2 0 0 42 E 0 7 30 3 0 0 40 ESE 0 1 7 14 0 0 22 SE 0 5 14 11 0 0 30 SSE 0 8 19 7 2 0 36 S 0 1 14 20 1 0 36 SSW 0 3 10 23 1 0 37 SW 0 6 33 9 0 0 48 WSW 1 7 33 14 0 0 55 W 2 5 17 6 0 0 30 WNW 1 6 15 1 0 0 23 NW 2 11 19 0 0 1 33 NNW 0 5 19 2 0 0 26 Variable 0 0 0 0 0 0 0 Total 9 90 306 119 4 1 529 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability cl asses: 6 88 of 104

Braidwood Generating Station Period of Record: July - September 2008 Stability Class - Moderately Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 3 18 0 0 0 22 NNE 0 5 18 1 0 0 24 NE 1 5 11 6 0 0 23 ENE 1 10 10 0 0 0 21 E 0 3 19 9 0 0 31 ESE 1 2 13 25 0 0 41 SE 0 4 7 9 0 0 20 SSE 0 2 9 2 0 0 13 S 0 8 20 2 0 0 30 SSW 1 8 9 2 0 0 20 SW 0 6 10 5 0 0 21 WSW 0 6 7 11 0 0 24 W 2 5 8 11 0 0 26 WNW 1 3 9 3 0 0 16 NW 0 8 13 1 0 0 22 NNW 0 1 17 0 0 0 18 Variable 0 0 0 0 0 0 0 Total 8 79 198 87 0 0 372 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: 6 89 of 104

Braidwood Generating Station Period of Record: July - September 2008 Stability Class - Extremely Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 6 5 1 12 NNE 1 1 3 0 5 NE 1 4 3 1 9 ENE 0 10 2 0 12 E 1 8 5 3 17 ESE 0 2 3 11 16 2 1 2 5 SE 0 1 5 1 0 7 SSE 1 2 1 0 4 S

2 5 1 0 8 SSW SW 2 6 0 0 8 WSW 1 1 0 0 2 W 1 2 4 4 11 WNW 1 3 17 3 24 NW 0 3 6 1 10 NNW 0 8 6 2 16 Variable 0 0 0 0 0 Total 12 68 58 28 0 0 166 Hours of calm in this stability class: 3 Hours of missing wind measurements in this sta bility claESS: 0 Hours of missing stability measurements in all stability classes: 6 90 of 104

Braidwood Generating Station Period of Record: October - December 2008 Stability Class - Extremely Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 3 0 0 0 3 NNE 0 0 0 0 0 0 0 NE 0 4 0 0 0 0 4 ENE 0 1 0 0 0 0 1 E 0 5 1 0 0 0 6 ESE 0 0 2 0 0 0 2 SE 0 1 1 0 0 0 2 SSE 0 0 0 0 0 0 0 S 0 0 3 1 0 0 4 SSW 0 0 2 2 0 0 4 SW 0 0 0 1 0 0 1 WSW 0 1 1 0 0 0 2 W 0 3 3 3 1 0 10 WNW 0 5 12 0 0 0 17 NW 0 .7 14 0 0 0 21 NNW 0 2 3 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 0 29 45 7 1 0 82 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 91 of 104

Braidwood Generating Station Period of Record: October - December 2008 Stability Class - Moderately Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 1 0 0 1 N 0 0 0 1 0 0 1 NNE 0 0 0 NE 0. 3 0 .0 0 0 3 ENE 0 2 0 0 0 0 2 E 0 0 0 0 0 0 0 ESE 0 7 4 0 0 0 11 SE 0 0 1 0 0 0 SSE 0 1 3 0 0 0 4 S 0 0 3 4 0 0 7 SSW 0 0 3 4 0 0 7 SW 0 0 1 1 0 .0 2 WSW 0 2 7 3 0 0 12 W 0 5 3 6 0 0 14 WNW 0 4 5 1 0 0 10 NW 0 4 4 0 0 0 8 NNW 0 6 2 0 0 0 8 Variable 0 0 0 0 0 0 0 Total 0 36 36 19 0 0 91 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability cl asses: 2 92 of 104

Braidwood Generating Station Period of Record: October - December 2008 Stability Class - Slightly Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 5 2 0 0 0 7 NNE 0 4 0 0 0 0 4 NE 0 6 0 0 0 0 6 ENE 0 5 0 0 0 0 5 E 1 2 0 0 0 0 3 ESE 0 1 1 0 0 0 2 SE 0 3 2 1 0 0 6 SSE 0 6 3 0 0 0 9 S 0 1 9 2 1 0 13 SSW 0 2 2 2 0 0 6 SW 0 0 3 1 0 0 4 WSW 0 3 7 2 0 0 12 W 0 6 8 5 0 0 19 WNW 0 3 1 0 0 0 4 NW 0 1 3 0 0 0 4 NNW 1 2 3 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 2 50 44 13 1 0 110 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 2 93 of 104

Braidwood Generating Station Period of Record: October - December 2008 Stability Class - Neutral - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 15 14 6 0 37 NNE 5 3 3 0 13 NE 18 3 0 0 23 ENE 10 0 0 0 16 E 9 1 0 0 11 ESE 28 9 0 0 39 SE 29 33 0 0 62 SSE 21 19 18 0 58 S 12 53 51 11 127 SSW 4 31 27 4 66 SW 12 38 12 0 62 WSW 25 27 9 6 68 W 34 71 29 6 141 WNW 19 46 12 0 83 NW 23 35 1 0 63 NNW 25 70 24 1 122 Variable 0 0 0 0 0 Total 29 289 453 192 28 0 991 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 51 Hours of missing stability measurements in all stability classes: 2 94 of 104

Braidwood Generating Station Period of Record: October - December 2008 Stability Class - Slightly Stable - 199Ft-30Ft Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

. Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 16 1 0 0 20 NNE 5 2 0 0 0 7 NE 4 8 0 0 0 12 ENE 11 5 0 0 0 16 E 29 20 0 0 0 49 ESE 12 29 7 0 0 48 SE 3 28 10 0 0 41 SSE 2 34 20 3 0 59 S 0 39 64 24 1 128 SSW 0 6 32 2 0 40 SW 1 10 11 3 0 25 WSW 5 14 1 1 0 21 W 7 27 4 1 0 39 WNW 6 17 4 1 1 29 NW 15 25 11 0 0 51 NNW 4 14 14 0 0 32 Variable 0 0 0 0 0 0 Total 107 294 179 35 0 617 Hours of calm in this stability class: 5 Hours of missing wind measurements in this stability class: 8 Hours of missing stability measurements in all stability cl asses: 2 95 of 104

Braidwood Generating Station Period of Record: October - December 2008 Stability Class - Moderately Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 6 5 0 0 0 0 11 NNE 8 0 0 0 0 0 8 NE 4 0 0 0 0 0 4 ENE 8 0 0 0 0 0 8 E 14 3 0 0 0 0 17 ESE 13 5 0 0 0 0 18 SE 1 3 0 0 0 0 4 SSE 1 0 0 0 0 0 1 S 2 0 0 0 0 0 2 SSW 1 5 2 0 0 0 8 SW 2 5 0 0 0 0 7 WSW 9 29 0 0 0 0 38 W 17 9 1 0 0 0 27 WNW 5 0 0 0 0 0 5 NW 9 0 0 0 0 0 9 NNW 6 1 0 0 0 0 7 Variable 0 0 0 0 0 0 0 Total 106 65 3 0 0 0 174 Hours of calm in this stability class: 5 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 96 of 104

Braidwood Generating Station Period of Record: October - December 2008 Stability Class - Extremely Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 34 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7, 8-12 13-18 19-24 > 24 Total N 1 0 0 0 0 0 1 NNE 1 0 0 0 0 0 1 NE 2 0 0 0 0 0 2 ENE 2 0 0 0 0 0 2 E 10 0 0 0 0 0 10 ESE 5 0 0 0 0 0 5 SE 4 0 0 0 0 0 4 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 4 1 0 0 0 0 5 WSW 3 11 0 0 0 0 14 W 1 1 0 0 0 0 2 WNW 0 0 0 0 0 0 0 NW 1 0 0 0 0 0 1 NNW 6 0 0 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 40 13 0 0 0 0 53 Hours of calm in this stability class: 14 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 97 of 104

Braidwood Generating Station Period of Record: October - December 2008 Stability Class - Extremely Unstable - 199Ft-30Ft Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 NNE 0 NE 3 ENE 2 E 6 ESE 2 SE 2 SSE 0 S 5 SSW 4 SW 0 WSW 1 W 6 WNW 18 NW 24 NNW 4 Variable 0 Total 0 12 25 30 8 4 79 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability classes: 2 98 of 104

Braidwood Generating Station Period of Record: October - December 2008 Stability Class - Moderately Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 NNE 0 0 0 NE 0 0 5 ENE 0 0 3 E 0 0 2 ESE 0 0 9 SE 0 0 2 SSE 0 0 3 S 0 1 9 SSW 0 0 5 SW 0 0 2 WSW 0 0 9 W 0 0 9 WNW 0 2 16 NW 0 2 4 3 I 0 10 NNW 0 0 6 2 0 0 8 Variable 0 0 0 0 0 0 0 Total 0 9 38 26 16 3 92 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 2 99 of 104

Braidwood Generating Station Period of Record: October - December 2008 Stability Class - Slightly Unstable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 4 1 0 0 7 NNE 0 3 1 0 0 0 4 NE 0 4 2 0 0 0 6 ENE 0 5 0 0 0 0 5 E 0 2 2 0 1 0 5 ESE 0 1 0 1 0 0 2 SE 0 2 2 1 2 0 7 SSE 0 5 2 2 0 0 9 S 0 1 4 3 3 1 12 SSW 0 0 4 1 1 1 7 SW 0 0 0 3 0 0 3 WSW 0 0 3 6 1 0 10 W 0 4 3 6 2 1 16 WNW 0 0 5 2 1 0 8 NW 0 0 1 2 0 0 3 NNW 0 2 3 1 0 0 6 Variable 0 0 0 0 0 0 0 Total 0 31 36 29 11 3 110 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability cl asses: 2 100 of 104

Braidwood Generating Station Period of Record: October - December 2008 Stability Class - Neutral - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 9 7 13 5 0 35 NNE 0 5 5 3 3 0 16 NE 1 5 7 4 0 0 17 ENE 2 8 8 2 0 0 20 E 2 2 7 5 2 0 18 ESE 0 6 4 25 3 0 38 SE 0 5 19 29 4 0 57 SSE 0 4 22 16 8 11 61 S 0 3 19 40 25 43 130 SSW 0 1 5 35 29 9 79 SW 0 3 13 28 4 0 48 WSW 0 8 16 14 6 3 47 W 1 11 22 47 18 11 110 WNW 1 1 24 56 30 8 120 NW 1 8 18 39 17 0 83 NNW 1 7 21 59 27 7 122 Variable 0 0 0 0 0 0 0 Total 10 86 217 415 181 92 1001 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 41 Hours of missing stability measurements in all stability classes: 2 101 of 104

Braidwood Generating Station Period of Record: October - December 2008 Stability Class - Slightly Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 16 2 0 0 20 NNE 1 2 3 0 0 0 6 NE 0 0 5 1 0 0 6 ENE 2 4 9 2 0 0 17 E 1 4 18 17 2 0 42 ESE 0 4 8 34 3 0 49 SE 2 6 16 18 3 0 45 SSE 1 3 18 18 15 0 55 S 1 0 18 66 31 14 130 SSW 0 0 8 37 8 0 53 SW 0 4 5 10 5 1 25 WSW 0 7 6 4 1 0 18 W 0 6 10 6 2 0 24 WNW 0 2 15 17 3 1 38 NW 1 5 24 25 1 0 56 NNW 1 3 18 16 0 0 38 Variable 0 0 0 0 0 0 0 Total 10 52 197 273 74 16 622 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 8 Hours of missing stability measurements in all stability cl asses: 2 102 of 104

Braidwood Generating Station Period of Record: October - December 2008 Stability Class - Moderately Stable - 199Ft-3OFt Delta-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 8 2 0 0 12 NNE 0 3 .1 0 0 0 4 NE 1 1 7 0 0 0 9 ENE 0 0 1 0 0 0 1 E 2 1 8 2 0 0 13 ESE 0 0 1 12 0 0 13 SE 1 4 8 4 0 0 17 SSE 1 0 3 3 0 0 7 S 0 1 0 0 0 0 1 SSW 0 0 1 3 1 0 5 SW 0 2 5 1 0 0 8 WSW 0 0 5 5 0 0 10 W 1 4 8 24 1 0 38 WNW 0 2 13 5 0 0 20 NW 0 3 7 0 0 0 10 NNW 0 6 5 0 0 0 11 Variable 0 0 0 0 0 0 0 Total 6 29 81 61 2 0 179 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 103 of 104

Braidwood Generating Station Pe:riod of Record: October - Decefrber 2008 Stability Class - Ext.remely Stab].e ]-99Ft-30Ft: De].t-r-T (F)

Winds Measured at 203 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 6 NNE 0 0 4 NE 2 0 7 ENE 0 0 1 E 0 0 4 ESE 1 0 7 SE 0 0 1 SSE 0 0 4 S 0 0 1 SSW 0 0 6 SW 0 0 2 WSW 0 0 7 W 1 0 11 WNW 0 0 2 NW 0 0 0 0 0 4 Variable 0 0 0 Total 4 23 24 16 0 0 67 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 104 of 104

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