ML091280431

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Limerick Generating Station, Units 1 & 2 - Annual Radioactive Effluent Release Report
ML091280431
Person / Time
Site: Limerick  Constellation icon.png
Issue date: 12/31/2008
From:
Exelon Nuclear
To:
Office of Nuclear Reactor Regulation
References
Download: ML091280431 (103)
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Text

Nuclear Annual Radioactive Effluent Release Report No. 34 2008 Limerick Generating Station SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT NO. 34 January 1, 2008 Through December 31, 2008 EXELON GENERATION COMPANY, LLC LIMERICK GENERATING STATION UNITS NO. 1 AND 2 DOCKET NO. 50-352 (Unit 1)DOCKET NO. 50-353 (Unit 2)Submitted to The United States Nuclear Regulatory Commission Pursuant to Facility Operating License: NPF-39 (Unit 1)NPF-85 (Unit 2)

SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC (Page Intentionally Left Blank)

SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC TABLE OF CONTENTS SECTION PAGE 1. Introduction 1 2. Supplemental Information 1 A Regulatory Limits 1 B Effluent Concentration Limits 2 C Average Energy 2 D Measurements and Approximations of Total Radioactivity 2 E Batch Releases 4 F Abnormal Releases 4 G Revisions to the ODCM 4 H Radioactive Effluent Monitoring Instrumentation Out of Service for More Than 30 Days 4 I Independent Spent Fuel Storage Installation (ISFSI) 5 J Compliance to 40 CFR Part 190 Limits 5 Appendix A -Effluent and Waste Disposal Summary 7 Appendix B -Solid Waste and Irradiated Fuel Shipments 21 Appendix C -Radiological Impact to Man 27 Appendix D -Meteorological Data 31 Page i SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC (Page Intentionally Left Blank)Page ii SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC 1. Introduction In accordance with the reporting requirements of Technical Specification 6.9.1.8 applicable during the reporting period, this report summarizes the effluent release data for Limerick Generating Station Units 1 and 2 for the period January 1, 2008 through December 31, 2008. This submittal complies with the format described in Regulatory Guide 1.21,"Measuring, Evaluating and Reporting Radioactivity in Solid Wastes and Releases of Radioactive Materials in Liquid and Gaseous Effluents from Light-Water Cooled Nuclear Power Plants", Revision 1, June, 1974.Meteorological data was reported in the format specified in Regulatory Guide 1.23, Revision 1, "Meteorological Monitoring Programs For Nuclear Power Plants".All vendor results were received and included in the report calculations.

Therefore the 2008 report is complete.2. Supplemental Information A. Regulatory Limits Limit Units Receptor ODCM and 10 CFR 50, Appendix .[Design Objective Limits 1. Noble Gases: a. < 500 mrem/Yr:< 3000 mrem/Yr b. <10<20 c. < 20< 40 d. <10< 30 mRad mRad mRad mRad mrem mrem Total Body Skin Air Gamma Air Beta Air Gamma Air Beta ODCM Control 3.2.2.1 .a Quarterly air dose limits ODCM Control 3.2.2.2.a Yearly airdose limits ODCM Control 3.2.2.2.b Total Body (Gamma)Skin (Beta)10 CFR 50, Appendix I, Section II.B.2(b)2. lodines, Tritium, Particulates with Half Life > 8 days: a. < 1500 mrem/Yr Any Organ b.<15 mrem mrem Any Organ Any Organ c. < 30 3. Liquid Effluents a. Concentration 10 CFR 20, Appendix B, Table 2 Col. 2 ODCM Control 3.2.2.1 .b Quarterly dose limits ODCM Control 3.2.2.3.a Yearly dose limits ODCM Control 3.2.2.3.b ODCM Control 3.2.1.1 Quarterly dose limits ODCM Control 3.2.1.2.a Yearly dose limits ODCM Control 3.2.1.2.b Yearly dose limits ODCM Control 3.2.3 b. <3<10 c. <6-<20 mrem mrem mrem mrem mrem mrem Total Body Any Organ Total Body Any Organ 4. 40CFR 190-<25< 75 Total Body or Organ Thyroid Page 1 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC B. Effluent Concentration Limits: Gaseous dose rates rather than effluent concentrations are used to calculate permissible release rates for gaseous releases.

The maximum permissible dose rates for gaseous releases are defined in ODCM Controls 3.2.2.2.a and 3.2.2.2.b.

The Effluent Concentration Limit (ECL) specified in 10 CFR 20, Appendix B, Table 2, Column 2 for identified nuclides, were used to calculate permissible release rates and concentrations for liquid release per the Limerick Offsite Dose Calculation Manual Control 3.2.1.1. The total activity concentration for all dissolved or entrained gases was limited to < 2E-04 gCi/ml.C. Average Energy ( E): The Limerick ODCM limits the instantaneous dose equivalent rates due to the release of noble gases to less than or equal to 500 mrem/year to the total body and less than or equal to 3000 mrem/year to the skin. The average beta and gamma energies (T) of the radionuclide mixture in-releases of fission and activation gases as described in Regulatory Guide 1.21,"Measuring, Evaluation, and Reporting Radioactivity in Solid Wastes and Releases of Radioactive Materials in Liquid and Gaseous Effluents from Light-Water-Cooled Nuclear Power Plants," maybe used to calculate doses in lieu of more sophisticated software.

The Limerick radioactive effluent program employs the methodologies presented in U.S. NRC Regulatory Guide 1.109 "Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10 CFR Part 50, Appendix I," Revision 1, October 1977 and NUREG-0133, "Preparation of Radiological Effluent Technical Specifications for Nuclear Power Plants, October 1978. Therefore, average energies are not applicable to Limerick.D. Measurements and Approximations of Total Radioactivity:

1. Fission and Activation Gases The method used for Gamma Isotopic Analysis is the Canberra Gamma Spectroscopy System with a gas Marinelli beaker. Airborne effluent gaseous activity was continuously monitored and recorded in accordance with ODCM Table 4.2-2. Additional vent grab samples were taken from the North Stack, Unit 1 South Stack and Unit 2 South Stack and analyzed at least monthly to determine the isotopic mixture of noble gas activity released for the month. The data from the noble gas radiation monitor were analyzed to report net noble gas effluent activity.

When no activity was found in the grab isotopic analysis, the isotopic mixture was assumed to be that evaluated in the UFSAR (Section 11.5, Table 11.5-4). If activity was found in the grab isotopic analysis, the isotopic mixture for the Noble Gas Monitor was determined from that isotopic mixture.Each month a monitor background was determined at the time of the noble gas grab sample and used to determine net radiation monitor activity.

When no isotopic activity was identified in the grab noble gas sample, the noble gas radiation monitor 15-minute average data for one-hour prior to and one-hour post noble gas grab sampling were used to determine monitor background for the month. The mean plus two standard deviations was used as background for each Noble Gas Monitor. When activity was identified the background determination was made from the last month that no activity was found.2. Particulates and lodines The method used for Gamma Isotopic Analysis is the Canberra Gamma Spectroscopy System with a particulate filter (47 mm) or charcoal cartridge, respectively.

Particulate and iodine activity was continuously sampled and analyzed in accordance with ODCM Table 4.2-2. Charcoal and particulate samples are taken from the North Stack, Unit 1 South Stack, Unit 2 South Stack and the Hot Maintenance Shop exhausts and analyzed Page 2 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC at least weekly to determine the total activity released from the plant based on the highest vent flow rates recorded for the sampling period.3. Liquid Effluents Each batch of liquid effluent was sampled and analyzed for gamma isotopic activity in accordance with ODCM Table 4.2-1 prior to release. The total activity of each released batch was determined by multiplying each nuclide's concentration by the total volume discharged and then summing. The total activity released during a month was then determined by summing the activity content of all batch releases discharged during the month.4. Tritium in Liquid and Gaseous Effluents:

Tritium in Liquid Effluents is analyzed using a Liquid Scintillation Counter.Air from stack effluents was passed through two bubblers in series and an aliquot of the water from each bubbler was analyzed using a Liquid Scintillation Counter.5. Composite Samples and Lower Limit of Detection (LLD)Particulate air samples were composited quarterly and analyzed for gross alpha, Sr-89 and Sr-90. Liquid radwaste samples were composited monthly and quarterly and analyzed for gross alpha (monthly) and Fe-55, Sr-89 and Sr-90 (quarterly).

These composites were submitted to an offsite vendor laboratory for analysis.

The ODCM required lower limit of detection for airborne and liquid releases are as follows: Airborne:

LLD Gross Alpha 1E-11 uCi/cc Sr-89, Sr-90 1 E-11 uCi/cc 1-131 1E-12 uCi/cc 1-133 1E-10 uCi/cc Principal Gamma Emitters (Mn-54, Fe-59, Co-58, Co-60, Zn-65, Mo-99, 1-131, Cs-134, 1E-11 uCi/cc Cs-137,Ce-141, Ce-144)Noble Gas (Kr-87, Kr-88,.Xe-133, Xe-133m, 1E-04'uCi/cc Xe-135, Xe-135m, Xe-138)H-3 1 E-06 uCi/cc Liquid: Principal Gamma Emitters (Mn-54, Fe-59, Co-58, Co-60, Zn-65, Mo-99, Cs-1 34, Cs-1 37, 5E-07 uCi/mI Ce-141, Ce-144)1-131 1 E-06 uCi/mI Entrained Gases (Kr-87, Kr-88, Xe-133, 1E-05 uCi/mI Xe-133m, Xe-135, Xe-135m, Xe-138)H-3 1 E-05 uCi/mI Gross Alpha 1 E-07 uCi/mI Sr-89, Sr-90 5E-08 uCi/mI Fe-55 1 E-06 uCi/mI 6. Estimated Total Error Present Procedure CY-AA-1 70-2100, Estimated Errors of Effluent Measurements, provides the methodology to obtain an overall estimate of the error associated with radioactive effluents.

Page 3 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC E. Batch Releases: 1. Liquid 2.Qtr 1 Qtr 2 Qtr 3 Qtr 4 Number of Batch Releases 8.80E+01 4.70E+01 4.40E+01 3.70E+01 Total time period for batch releases (min) 7.73E+03 3.60E+03 4.02E+03 3.33E+03 Maximum time period for batch release (min) 1.16E+02 1.08E+02 1.31 E+02 1.03E+02 Average time period for batch release (min) 8.78E+01 7.65E+01 9.13E+01 8.99E+01 Minimum time period for batch release (min) 5.36E+01 2.37E+01 3.24E+01 5.04E+01 Average stream flow (Schuylkill River) during periods of release of effluents into a flowing 2.08E+06 7.26E+05 3.16E+05 1.10E+06 stream (gpm)Gaseous Oil Incineration Qtr 1 Qtr 2 Qtr 3 Qtr 4 Number of Batch Releases 0' 0 0 0 Total time period for batch releases (min) 0 0 0 0 Maximum time period for batch release (min) 0 0 0 0 Average time period for batch release (min) 0 0 0 0 Minimum time period for batch.release (min) 0 0 0 0 Other Batch Releases Qtr 1 Qtr 2 Qtr 3 Qtr 4 Number of Batch Releases 6.00E+0c 2.OOE+00 0 0 Total time period for batch releases (min) 1.27E+04 3.72E+03 0 0 Maximum time period for batch release (min) 2.50E+01 2.22E+03 0 0 Average time period for batch release (min) 2.12E+03 1.86E+03 0 0 Minimum time period for batch release (min) 9.00E+011 1.50E+03 0 0 F. Abnormal Releases: 1. Liquid 1 Qtr 2 Qtr 3 Qtr 4 Number of Releases 0 2 0 0 Total Activity Released (Ci) 0 8.36E-05 0 0 2. Gaseous Number of Releases 6 2 0 0 Total Activity Released (Ci) 2.1 E-05 1.82E-06 0 0 G. Revisions to the ODCM Revision 24 of CY-LG-170-301, Offsite Dose Calculation Manual was approved on July 21, 2008. A complete copy is included in the mailing.H. Radioactive Effluent Monitoring Instrumentation Out of Service for More Than 30 Days Per ODCM Control 3.1.1, "Radioactive Liquid Effluent Monitoring Instrumentation" and Control 3.1.2 "Radioactive Gaseous Effluent Monitoring Instrumentation", instrumentation requires: Page 4 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC With less than the minimum number of radioactive gaseous effluent monitoring instrumentation channels OPERABLE, take the ACTION shown in Table 3.1-1 (liquids) or and Table 3.1-2 (gas). Restore the inoperable instrumentation to OPERABLE status within the time specified in the ACTION or explain in the next Annual Radioactive Effluent, Release Report why this inoperability was not corrected within the time specified.

The following is a discussion of instrumentation out of service for greater than 30 days: Per IR 789169, the Liquid Radwaste effluent line flow monitor was declared inoperable on June 22, 2008 and remained inoperable through the end of 2008. Release flows were conservatively reduced to ensure that release flows did not exceed the ODCM limit of 255 gallons per minute.The effluent line flow monitor was not repaired in the 30-day time frame was due to the complex troubleshooting that was required to determine the cause of the suspect flow readings.

The flow orifice was eventually replaced, which required an engineering change request to evaluate the replacement.

However, this did not eliminate the issue.Troubleshooting is continuing.

Independent Spent Fuel Storage Installation (ISFSI)An Independent Spent Fuel Storage Installation (ISFSI) was placed in service starting July 21, 2008. In 2008 a total of two canisters were placed in long-term storage. The dose to offsite individuals was non detectable.

J. Compliance to 40 CFR 190 Limits The radioactive material released during this reporting period and the doses listed in this report were within the limits of the ODCM and 40 CFR 190. A detailed analysis of doses to Members of the Public is presented in Appendix C, Radiological Impact to Man.Page 5 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC, (Page Intentionally Left Blank)Page 6 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Appendix A Effluent and Waste Disposal Summary Page 7 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC (Page Intentionally Left Blank)Page 8 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC LIST OF TABLES PAGE Table A -1 Gaseous Effluents

-Summation of All Releases 11 Table A -2 Gaseous Effluents for Release Point -North Stack 12 Table A -3 Gaseous Effluents for Release Point -Unit 1 South Stack 13 Table A -4 Gaseous Effluents for Release Point -Unit 2 South Stack 14 Table A -5 Gaseous Effluents for Release Point -Hot Maintenance Shop 15 Table A -6 Gaseous Effluents for Release Point -Oil Incineration 16 Table A -7 Gaseous Effluents for Release Point -Other Batch Releases 17 Table A -8 Liquid Effluents

-Summation.of All Releases 18 Table A -9 Liquid Effluents for Release Point -Liquid Radwaste 19 Page 9 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC (Page Intentionally Left Blank)Page 10 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC TABLE A -1 GASEOUS EFFLUENTS

-SUMMATION OF ALL RELEASES PERIOD 2008 A. FISSION AND ACTIVATION GASSES Units Qtr [ Qtr 2 Qtr 3 Qtr4 Est. Total Error %1. Total Release Ci 9.65E+00 5.57E+01 6.06E+00 1.94E+00 3.66E+01 2. Averaae Release Rate for Period uCi/sec 1.23E+00 7.08E+00 7.16E-01 2.47E-01 3. Dose-GammaAirDose mrad 1.78E-02 5.50E-02 8.25E-03 2.13E-03-Beta Air Dose mrad 1.04E-02 3.42E-02 4.93E-03 1.31 E-03 4. Percent of ODCM Limit % 1.78E-01 5.50E-01 8.25E-02 2.13E-02-Gamma Air Dose-Beta Air Dose % 5.20E-02 1.71 E-01 2.47E-02 6.55E-03 B. IODINES C. PARTICULATES Units Qtr 1 Qtr 2 Qtr 3 Qtr4 Est. Total Error %1. Particulates with T 1/2 > 8 days Ci 8.24E-05 1.92E-06 < LLD < LLD 2.26E+01 2. Average Release Rate for Period uCi/sec 1.05E-05 2.44E-07 < LLD < LLD 3. Percent of ODCM Limit %* * * *4. Gross Alpha Radioactivity Ci < LLD < LLD < LLD < LLD D. TRITIUM Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Est. Total Error %1. Total Release Ci 1.28E+00 3.73E-01 1.04E+01 9.52E+00 1.57E+01 2. Averacae Release Rate for Period I uCi/sec 1.63E-01 4.75E-02 1.23E+00 1.21 E+00 13. Percent of ODCM Limit % * * * *E. Iodine 131 & 133, Tritium & Particulate Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 1i. Organ Dose mrem 3.81E-03 9.OOE-04 2.46E-02 2.26E-02 2. Percent of ODCM Limit % 2.54E-02 6.OOE-03 1.64E-01 1.51 E-01* ODCM Limit for combined Iodine, tritium and particulate only, which is shown in Item E.Page 11 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC TABLE A -2 GASEOUS EFFLUENTS FOR RELEASE POINT -NORTH STACK PERIOD 2008 1. FISSION AND ACTIVATION GASSES Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 AR-41 Ci < LLD < LLD < LLD < LLD KR-85 Ci 6.29E-01 3.14E-03 1.71E-01 1.62E-02 KR-85M Ci 1.67E-01 8.31 E-04 4.53E-02 4.29E-03 KR-87 Ci 2.92E-01 1.46E-03 7.94E-02 7.53E-03 KR-88 Ci 5.16E-01 2.58E-03 1.40E-01 1.33E-02 XE-131M Ci 1.58E-02 7.86E-05 4.28E-03 4.06E-04 XE-133 Ci 5.87E-02 2.93E-04 1.60E-02 1.51E-03 XE-1 33M Ci <LLD < LLD < LLD < LLD XE-135 Ci 2.30E+00 1.15E-02 6.25E-01 5.93E-02 XE-135M Ci 1.47E+00 7.31 E-03 3.98E-01 3.78E-02 XE-138 Ci 3.14E+00 1.57E-02 8.54E-01 8.1OE-02 Total for Period Ci 8.58E+00 4.28E-02 2.33E+00 2.21 E-01 2. IODINES Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 1-131 Ci < LLD < LLD < LLD <LLD 1-133 Ci < LLD < LLD < LLD < LLD 1-135 Ci < LLD < LLD < LLD < LLD Total for Period Ci < LLD < LLD < LLD < LLD 3. PARTICULATES (T 1/2 > 8 DAYS)Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 CR-51 Ci < LLD < LLD < LLD < LLD MN-54 Ci < LLD < LLD < LLD < LLD CO-58 Ci < LLD < LLD < LLD < LLD CO-60 Ci < LLD < LLD < LLD < LLD SR-89 Ci < LLD < LLD < LLD < LLD SR-90 Ci < LLD < LLD < LLD < LLD MO-99 Ci < LLD < LLD < LLD < LLD AG-110M Ci < LLD < LLD < LLD < LLD CS-134 Ci < LLD < LLD < LLD < LLD CS-137 Ci < LLD < LLD < LLD < LLD BA-140 Ci < LLD < LLD < LLD < LLD LA-140 Ci < LLD < LLD < LLD < LLD CE-141 Ci < LLD < LLD < LLD < LLD CE-144 Ci < LLD < LLD < LLD < LLD Total for Period Ci < LLD < LLD < LLD < LLD Page 12 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC TABLE A -3 GASEOUS EFFLUENTS FOR RELEASE POINT -UNIT 1 SOUTH STACK PERIOD 2008 1. FISSION AND ACTIVATION GASSES Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 AR-41 Ci 6.47E-02 3.97E+00 2.66E-01 3.27E-02 KR-85 Ci < LLD < LLD < LLD < LLD KR-85M Ci 1.55E-02 9.51 E-01 6.38E-02 7.84E-03 KR-87 Ci 1.55E-02 9.51E-01 6.38E-02 7.84E-03 KR-88 Ci 1.55E-02 9.51 E-01 6.38E-02 7.84E-03 XE-133 Ci 3.36E-01 2.06E+01 1.38E+00 1.70E-01 XE-133M Ci < LLD < LLD < LLD < LLD XE-135 Ci 1.76E-01 1.08E+01 7.23E-01 8.89E-02 XE-135M Ci 2.38E-01 1.46E+01 9.79E-01 1.20E-01 XE-138 Ci 3.62E-02 2.22E+00 1.49E-01 1.83E-02 Total for Period Ci 8.97E-01 5.50E+01 3.69E+00 4.54E-01 2. IODINES Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 1-131 Ci < LLD < LLD < LLD < LLD 1-133 Ci < LLD < LLD < LLD < LLD 1-135 Ci < LLD < LLD < LLD < LLD Total for Period Ci < LLD < LLD < LLD < LLD 3. PARTICULATES (T 1/2 > 8 DAYS)Nuclide Released Continuous ModeýUnits Qtr 1 Qtr 2 Qtr 3 Qtr 4 CR-51 Ci < LLD < LLD < LLD < LLD MN-54 Ci 5.99E-06 < LLD < LLD < LLD CO-58 Ci < LLD < LLD < LLD < LLD CO-60 Ci 2.20E-05 < LLD < LLD < LLD SR-89 Ci < LLD < LLD < LLD < LLD SR-90 Ci < LLD < LLD < LLD < LLD MO-99 Ci < LLD < LLD < LLD < LLD AG-110M Ci < LLD < LLD < LLD < LLD CS-134 Ci < LLD < LLD < LLD < LLD CS-137 Ci < LLD < LLD < LLD < LLD BA-140 Ci < LLD < LLD < LLD < LLD LA-140 Ci < LLD < LLD < LLD < LLD CE-141 Ci < LLD < LLD < LLD < LLD CE-144 Ci < LLD < LLD < LLD < LLD Total for Period Ci 2.80E-05 < LLD < LLD < LLD Page 13 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC TABLE A -4 GASEOUS EFFLUENTS FOR RELEASE POINT -UNIT 2 SOUTH STACK PERIOD 2008 1. FISSION AND ACTIVATION GASSES Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 AR-41 Ci 1.18E-02 4.07E-02 2.60E-03 9.14E-02 KR-85 Ci < LLD < LLD < LLD < LLD KR-85M Ci 2.83E-03 9.75E-03 6.23E-04 2.19E-02 KR-87 Ci 2.83E-03 9.75E-03 6.23E-04 2.19E-02 KR-88 Ci 2.83E-03 9.75E-03 6.23E-04 2.19E-02 XE-133 Ci 6.13E-02 2.11E-01 1.35E-02 4.75E-01 XE-133M Ci < LLD < LLD < LLD < LLD XE-135 Ci 3.21E-02 1.10E-01 7.06E-03 2.48E-01 XE-135M Ci 4.34E-02 1.50E-01 9.56E-03 3.36E-01 XE-138 Ci 6.61 E-03 2.28E-02 1.46E-03 5.12E-02 Total for Period Ci 1.64E-01 5.64E-01 3.60E-02 1.27E+00 2. IODINES Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 1-131 Ci < LLD < LLD < LLD < LLD 1-133 Ci < LLD < LLD < LLD < LLD 1-135 Ci < LLD < LLD < LLD < LLD Total for Period Ci < LLD < LLD < LLD < LLD 3. PARTICULATES (T 1/2 > 8 DAYS)Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 CR-51 Ci < LLD < LLD < LLD < LLD MN-54 Ci 1.81 E-05 < LLD < LLD < LLD CO-58 Ci < LLD < LLD < LLD < LLD CO-60 Ci 1.43E-05 < LLD < LLD < LLD SR-89 Ci < LLD < LLD < LLD < LLD SR-90 Ci < LLD < LLD < LLD < LLD MO-99 Ci < LLD < LLD < LLD < LLD AG-110M Ci < LLD < LLD < LLD < LLD CS-134 Ci < LLD < LLD < LLD < LLD CS-137 Ci < LLD < LLD < LLD < LLD BA-140 Ci < LLD < LLD < LLD < LLD LA-140 Ci < LLD < LLD < LLD < LLD CE-141 Ci < LLD < LLD < LLD < LLD CE-144 Ci < LLD < LLD < LLD < LLD Total for Period Ci 3.24E-05 < LLD < LLD < LLD Page 14 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC TABLE A -5 GASEOUS EFFLUENTS FOR RELEASE POINT -HOT MAINTENANCE SHOP PERIOD 2008 1. FISSION AND ACTIVATION GASSES NO ANALYSIS PERFORMED FOR ACTIVATION GASSES. PATHWAY DOES NOT EXIST.2. IODINES Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 .Qtr 3 Qtr 4 1-131 Ci < LLD < LLD < LLD < LLD 1-133 Ci < LLD < LLD < LLD < LLD 1-135 Ci < LLD < LLD < LLD < LLD Total for Period Ci <LLD < LLD < LLD < LLD 3. PARTICULATES (T 1/2 > 8 DAYS)Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 CR-51 Ci < LLD < LLD < LLD < LLD MN-54 Ci < LLD < LLD < LLD < LLD CO-58 Ci < LLD < LLD < LLD < LLD CO-60 Ci 9.28E-08 9.97E-08 < LLD < LLD SR-89 Ci < LLD < LLD < LLD < LLD SR-90 Ci < LLD < LLD < LLD < LLD MO-99 Ci < LLD < LLD < LLD < LLD AG-11OM Ci < LLD < LLD < LLD < LLD CS-134 Ci < LLD < LLD < LLD < LLD CS-137 Ci < LLD < LLD < LLD < LLD BA-140 Ci < LLD < LLD < LLD < LLD LA-140 Ci < LLD < LLD < LLD < LLD CE-141 Ci < LLD < LLD < LLD < LLD CE-144 Ci < LLD < LLD < LLD < LLD Total for Period Ci 9.28E-08 9.97E-08 < LLD < LLD Page 15 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC TABLE A -6 GASEOUS EFFLUENTS FOR RELEASE POINT -OIL INCINERATION PERIOD 2008 NO OIL BURNING OCCURRED IN 2008.1. FISSION AND ACTIVATION GASSES NO ANALYSIS PERFORMED FOR ACTIVATION GASSES. PATHWAY DOES NOT EXIST.2. IODINES Nuclide Released Batch Release Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 1-131 Ci N/A N/A N/A N/A 1-133 Ci N/A N/A N/A N/A 1-135 Ci N/A N/A N/A N/A Total for Period Ci N/A N/A N/A N/A 3. PARTICULATES (T 1/2 > 8 DAYS)Nuclide Released Batch Release Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 CR-51 Ci N/A N/A N/A N/A MN-54 Ci N/A N/A N/A N/A CO-58 Ci N/A N/A N/A N/A CO-60 Ci N/A N/A N/A N/A SR-89 Ci N/A N/A N/A N/A SR-90 Ci N/A N/A N/A N/A MO-99 Ci N/A N/A N/A N/A AG-110M Ci N/A N/A N/A N/A CS-134 Ci N/A N/A N/A N/A CS-137 Ci N/A N/A N/A N/A BA-140 Ci N/A N/A N/A N/A LA-140 Ci N/A N/A N/A N/A CE-141 Ci N/A N/A N/A N/A CE-144 Ci N/A N/A N/A N/A CE-144 Ci N/A N/A N/A N/A Total for Period Ci N/A N/A N/A N/A Page 16 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC TABLE A -7 GASEOUS EFFLUENTS FOR RELEASE POINT -OTHER BATCH RELEASES PERIOD 2008 1. FISSION AND ACTIVATION GASSES Nuclide Released Batch Release Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 AR-41 Ci N/A N/A N/A N/A KR-85 Ci N/A N/A N/A N/A KR-85M Ci N/A N/A N/A N/A KR-87 Ci N/A N/A N/A N/A KR-88 Ci N/A N/A N/A N/A XE-133 Ci N/A N/A N/A N/A XE-133M Ci N/A N/A N/A N/A XE-135 Ci N/A N/A N/A N/A XE-135M Ci N/A N/A N/A N/A XE-138 Ci N/A N/A N/A N/A Total for Period Ci N/A N/A N/A N/A 2. IODINES Nuclide Released Batch Release Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 1-131 Ci < LLD < LLD < LLD < LLD 1-133 Ci < LLD < LLD < LLD < LLD 1-135 Ci < LLD < LLD < LLD < LLD Total for Period Ci < LLD < LLD < LLD < LLD 3. PARTICULATES (T 1/2 > 8 DAYS)Nuclide Released Batch Release Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 CR-51 Ci < LLD < LLD < LLD < LLD MN-54 Ci 3.29E-06 8.49E-07 < LLD < LLD CO-58 Ci 1.60E-06 < LLD < LLD < LLD CO-60 Ci 1.40E-05 9.71 E-07 < LLD < LLD ZN-65 Ci 3.01 E-06 < LLD < LLD < LLD MO-99 Ci < LLD < LLD < LLD < LLD AG-110M Ci < LLD < LLD < LLD < LLD CS-134 Ci < LLD < LLD < LLD < LLD CS-137 Ci < LLD < LLD < LLD < LLD BA-140 Ci < LLD < LLD < LLD < LLD LA-140 Ci < LLD < LLD < LLD < LLD CE-141 Ci < LLD < LLD < LLD < LLD CE-144 Ci < LLD < LLD < LLD < LLD CE-144 Ci < LLD < LLD < LLD <LLD Total for Period Ci 2.19E-05 1.82E-06 < LLD < LLD Page 17 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC TABLE A -8 LIQUID EFFLUENTS

-SUMMATION OF ALL RELEASES A. FISSION AND ACTIVATION PRODUCTS PERIOD 2008 Est. Total Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Error %1. Total release (not including tritium, Ci 5.07E-03 2.54E-03 5.28E-02 8.93E-03 2.11E+01 gasses & alpha)2. Average diluted concentration during uCi/mI 2.87E-08 3.13E-08 5.27E-07 1.08E-07 batch discharge for the period 3. Dose -Whole Body mrem 7.24E-04 4.35E-03 6.14E-03 2.28E-03-Organ mrem 8.62E-04 6.35E-03 9.18E-04 3.34E-03 4. % of ODCM Limit -Whole Body Dose* % 2.41 E-02 1.45E-01 2.05E-01 7.60E-02-Organ Dose* % 8.62E-03 6.35E-02 9.18E-03 3.34E-02 B. TRITIUM Est. Total Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Erroral Error %1. Total Release Ci 2.03E+01 7.09E+00 6.97E+00 6.75E+00 6.43E+00 2. Average diluted concentration during uCi/mI 1.15E-04 8.73E-05 6.95E-05 8.18E-05 batch discharge for the period 3. % of ODCM Limit -ECL % 1.15E+00 8.37E-01 6.95E-01 8.18E-01 C. DISSOLVED AND ENTRAINED GASSES Est. Total Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Erroral Error %1. Total release Ci 6.65E-04 3.75E-06 2.66E-05 < LLD 2.11E+01 2. Average diluted concentration during uCi/mI 3.76E-09 4.62E-1 1 2.65E-10 < LLD batch discharge for the period 3 %of ODCM Limit -ECL % 1.88E-03 2.31E-05 1.33E-04 N/A D. GROSS ALPHA RADIOACTIVITY Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Est. Total Error %1. Total release Ci < LLD <LLD < LLD < LLD 2.30E+01 2. Average diluted concentration during uCi/mI < LLD <LD < LLD < LLD batch discharge for the period Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Est. Total Error %E. Volume of waste released (prior to Liters 5.62E+06 2.49E+06 2.47E+06 2.13E+06 5.OOE+00 dilution)F. Volume of dilution water used during Liters 1.71 E+08 7.88E+07 9.78E+07 8.04E+07 3.56E+00 periodI II* Percent of limit includes tritium.Page 18 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC TABLE A -9 LIQUID EFFLUENTS FOR RELEASE POINT -LIQUID RADWASTE PERIOD 2008 Nuclide Released Batch Release.Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 NA-24 Ci < LLD 7.81 E-06 2.28E-06 2.03E-06 CR-51 Ci 6.79E-04 1.53E-05 < LLD < LLD MN-54 Ci 1.34E-03 8.49E-04 5.66E-04 2.95E-04 FE-55 Ci < LLD < LLD 5.01 E-02 6.92E-03 MN-56 Ci < LLD < LLD < LLD 1.26E-06 CO-58 Ci 1.62E-04 4.64E-05 2.47E-05 5.23E-06 FE-59 Ci 3.84E-04 1.27E-05 < LLD < LLD CO-60 Ci 2.21 E-03 8.84E-04 1.29E-03 8.83E-04 NI-63 Ci < LLD < LLD < LLD < LLD CU-64 Ci < LLD < LLD < LLD < LLD NI-65 Ci < LLD < LLD < LLD < LLD ZN-65 Ci 1.64E-04 5.43E-05 3.14E-04 1.85E-04 ZN-69 Ci < LLD < LLD < LLD < LLD ZN-69M Ci < LLD < LLD 2.45E-06 < LLD SR-89 Ci < LLD < LLD < LLD < LLD SR-90 Ci < LLD < LLD < LLD < LLD NB-95 Ci 2.44E-06 < LLD < LLD < LLD ZR-95 Ci 1.61 E-06 < LLD < LLD < LLD RU-105 Ci 1.44E-06 < LLD < LLD < LLD AG-11iM Ci < LLD < LLD < LLD < LLD SB-1 24 Ci 5.02E-05 6.86E-06 7.84E-06 2.75E-06 SB-125 Ci 3.01 E-05 8.79E-05 2.18E-04 1.71 E-04 1-131 Ci < LLD < LLD < LLD 4.23E-07 1-133 Ci < LLD 6.30E-07 < LLD < LLD CS-134 Ci < LLD 2.31 E-05 8.56E-06 1.84E-05 CS-1 37 Ci 3.64E-05 5.48E-04 2.68E-04 4.50E-04 BA-140 Ci < LLD < LLD < LLD < LLD LA-140 Ci < LLD 7.54E-06 1.26E-05 < LLD CE-141 Ci < LLD < LLD < LLD < LLD CE-144 Ci < LLD < LLD < LLD < LLD Total for Period Ci 5.06E-03 2.54E-03 5.28E-02 8.93E-03 XE-1 33M Ci 5.76E-06 < LLD < LLD < LLD XE-1 33 Ci 3.96E-04 3.75E-06 1.48E-05 < LLD XE-135M Ci 8.06E-07 < LLD < LLD < LLD XE-135 Ci 2.62E-04 < LLD 1.18E-05 < LLD Total for Period Ci 6.65E-04 3.75E-06 2.66E-05 < LLD Page 19 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC (Page Intentionally Left Blank)Page 20 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC , Appendix B Solid Waste and Irradiated Fuel Shipments Page 21 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC (Page Intentionally Left Blank)Page 22 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC A. Solid waste shipped offsite for burial or disposal (not irradiated fuel) 01/01/2008

-12/31/2008

1. Type of waste Type of waste Uni112 Month Period Estimated Error %a. Spent resin, filters sludges, evaporator bottoms, etc m 3 51.90 25%Ci 2.24E+03 b. Dry compressible waste, contaminated equipment, etc.1 m 3 l 58.80 25%Ci 8.68E+00 c. Irradiated components, control rods, etc. m 3 None N/A ci None Other(Describe)

MI None N/A Ci None I 2. Estimate of Major Nuclide Composition (By Waste Type)Category A -Spent Resin, Filters, Sludges, Evaporator Bottoms, etc.Waste Class Waste Class Waste Class A Percent B Percent C Percent Isotope Curies

  • Abundance Curies
  • Abundance Curies* Abundance C-14 2.19E-01 0.16% 2.86E-03 0.10% 7.29E-01 0.03%Mn-54 2.11E+01 15.06% 6.76E-02 2.44% 7.27E+01 3.46%Fe-55 7.73E+01 55.21% 3.71 E-01 13.42% 1.40E+03 66.55%Co-58 1.48E+00 1.06% 0.OOE+00 0.00% 6.23E-01 0.03%Co-60 3.06E+01 21.85% 2.25E+00 81.34% 5.56E+02 26.43%Ni-63 1.05E+00 0.75% 5.82E-02 2.10% 1.47E+01 0.70%Zn-65 4.12E+00 2.94% 0.OOE+00 0.00% 5.20E+01 2.47%Cs-137 1.21 E+00 0.86% 1.25E-02 0.46% 3.15E+00 0.15%Cr-51 1.11 E+00 0.78% 0.OOE+00 0.00% 1.78E+00 0.08%Fe-59 2.20E-03 0.01% 0.OOE+00 0.00% 2.54E-01 0.01%H-3 2.30E-01 0.16% 1.09E-03 0.03% 1.53E-01 0.01%Pu-241 1.29E+00 0.92% 3.98E-04 0.01% 9.90E-01 0.05%Sr-90 4.70E-02 0.03% 2.79E-03 0.10% 5.07E-01 0.02%Ce-144 2.99E-01 0.21% 0.OOE+00 0.00% 1.96E-01 0.01%Totals 1.40E+02 100.00% 2.77E+00 100.00% 2.1OE+03 100.00%* Activity is estimated Page 23 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Category B -Dry Compressible Waste, Contaminated Equipment, etc.Waste Class A Percent Waste Class B Percent Isotope Curies
  • Abundance Curies
  • Abundance Cr-51 9.65E-01 11.26% 0.00E+00 0.00%Mn-54 1.61 E+00 18.79% 2.61 E-03 2.44%Fe-55 1.59E+00 18.55% 1.43E-02 13.38%Co-58 1.75E-01 2.04% 0.OOE+00 0.00%Co-60 3.26E+00 38.04% 8.72E-02 81.60%Fe-59 2.33E-01 2.72% 0.OOE+00 0.00%Zn-65 2.58E-01 3.01% 0.OOE+00 0.00%Ni-63 2.37E-01 2.77% 2.27E-03 2.12%Cs-137 9.75E-02 1.14% 4.86E-04 0.46%Nb-95 1.44E-01 1.68% 0.OOE+00 0.00%Totals 8.57E+00 100.00% 1.07E-01 100.00%* Activity is estimated 3. Solid Waste (Disposition)

Number of Shipments Mode of Transportation Destination 15 Truck Studsvik (THOR) to Barnwell 10 Truck Studsvik (THOR) to Energy Solutions

/ Clive 35 Truck Duratek to Energy Solutions

/ Clive 4 Truck Limerick Gen. Sta. To Energy Solutions

/ Clive 1 Truck Limerick Generating Station to Barnwell Comments: 20 Shipments were made from Limerick to Duratek for processing 7 Shipments were made from Limerick to Studsvik (THOR) for processing No solidifications were performed Category A -20 shipments Type A LSA Category A -4 shipments

> Type A LSA Category A -5 shipments Type B Category B -36 shipments Type A LSA Category C -No shipments made Category D -No shipments made B. Irradiated Fuel Shipments (disposition) lNumber of Shipmentsl Mode of Transportation Destination 10 1N/A IN/A Page 24 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC C. Changes to the Process Control Program Revision 6 to procedure RW-AA-100, "Process Control Program For Radioactive Waste" was implemented in 2008. Step 4.2.10 was changed to specify the documentation required for High Integrity Containers (HIC) at the burial site. The revision did not make any changes to the Process Control Program at Limerick.Page 25 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC (Page Intentionally Left Blank)Page 26 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Appendix C Radiological Impact to Man Page 27 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC (Page Intentionally Left Blank)Page 28 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Per ODCM Control 6.2, the Annual Radioactive Effluent Release Report shall include an assessment of the radiation doses to the hypothetically highest exposed MEMBER OF THE PUBLIC from reactor releases and other nearby uranium fuel cycle sources. For purposes of this calculation the following assumptions were made: Gaseous* Annual average meteorology and actual gaseous effluent releases were used.* Beta air dose attributed to noble gas releases.* The sector with the highest x/Q, x/Q depleted and D/Q was the SE sector at Site Boundary 762 meters.* All significant pathways were assumed to be present" Occupancy factor was considered 100%.Liquid* Average river flow rate for the year (2.91 OE+03 cfs) was used.A summary of gaseous and liquid radiation doses to members of the public at these locations was as follows: Effluent Applicable Estimated Age Location % of Limit Unit Organ Dose Group Distance Direction Applicable (meters) (toward) Limit Noble Gas Gamma -Air Dose 8.55E-03 All 762 SE 4.28E-02 20 mRad Noble Gas Beta -Air Dose 5.22E-03 All 762 SE 1.31 E-02 40 mRad Noble Gas Total Body (Gamma) 5.32E-03 All 762 SE 5.32E-02 10 mrem Noble Gas Skin (Beta) 9.93E-03 All 762 SE 3.31 E-02 30 mrem Iodine, Particulate

& GI-LLI 5.87E-03 Child 762 SE 1.96E-02 30 mrem Tritium Liquid Total Body 7.11E-03 Adult LGS Outfall 1.19E-01 6 mrem Liquid Liver 1.02E-02 Teen LGS Outfall 5.10E-02 20 mrem Doses calculated were well below all ODCM and 40 CFR Part 190 limits of 25 mrem to a real individual.

The ODCM does not require population doses to be calculated.

ODCM Control 6.2 also requires that the Annual Effluent Release Report shall include an assessment of the radiation doses from radioactive liquid and gaseous effluents to members of the public due to activities inside the Site Boundary during the report period. ODCM Controls state that MEMBER OF THE PUBLIC shall include all persons not occupationally associated with the plant. This category does not include employees of the utility or contractors.

Also excluded from this category are persons who enter the site to service equipment or to make deliveries.

This category does include persons who use portions of the site for recreational, occupational education, or other purposes not associated with the plant. Areas within the site boundary, where radiation dose of this type could occur include the Limerick Information Center on Longview Road near the rear exit of the plant, Frick's Lock on the west shore of the Schuylkill River and the railroad tracks that runs along the east shore of the River. The dose to State Police and National Guard personnel around the location of the Security Checkpoint was also included in this report. The radiation doses to Members of the Public have been estimated using methodology stated in the ODCM. The maximum gaseous dose to members of the public at these locations is based on the following assumptions:

  • Annual average meteorology and actual effluent releases were used.* Beta air dose attributed to noble gas releases.* Dose is from ground plane and inhalation only. No ingestion dose.* Adult age group was used for the State Police and National Guard Dose.Page 29 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC The calculated annual average x/Q, x/Q depleted and D/Q for the highest exposed sector for the railroad tracks (W), and the sectors encompacing the Security Checkpoint, Frick's Lock and the Information Center were -used.* The maximum expected occupancy factor is 25% of a working year at all locations.

  • Distance to the railroad tracks, which pass through the Site Boundary in the W sector, is approximately 225 meters.* Distance to the Limerick Information Center is approximately 884 meters in the ESE sector.* Distance to Frick's Lock is approximately 450 meters in the WSW sector.* Distance to Security Checkpoint is approximately 682 meters in the NNE sector.A summary of gaseous radiation doses to members of the public at these locations is as follows: Approx. GAMMA Beta Air Iodine/Part/H3 Distance AIR Dose, Organ Dose, Location Sector DOSE, (meters) MRAD(1) MRAD(2) MREM(3>Frick's Lock WSW 450 7.04E-04 4.30E-04 1.10E-04 Info. Center ESE 884 9.59E-04 5.85E-04 1.63E-04 R.R. Tracks W 225 4.14E-03 2.53E-03 6.50E-04 National Guard / Security NNE 682 6.34E-04 3.87E-04 1.04E-04 Check Point I I Notes: (1) The limit for Gamma Air Dose = 20 mRad/Yr (ref. ODCM 3.2.2.2.b)

(2) The limit for Beta Air Dose = 40 mRad/Yr (ref. ODCM 3.2.2.2.b)

(3) The limit for Iodine/Particulate/H-3 Organ Dose = 30 mrem/Yr (ref. ODCM 3.2.2.3.b)

Page 30 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Appendix D Meteorological Data Page 31 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC (Page Intentionally Left Blank)Page 32 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC *LIST OF TABLES PAGE Table D -1 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January- March, 2008 35 Table D -2 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January- March, 2008 42 Table D -3 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, April -June, 2008 49 Table D -4 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, April -June, 2008 56 Table D -5 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, July -September, 2008 63 Table D -6 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, July -September, 2008 70 Table D -7 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, October -December, 2008 77 Table D -8 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, October -December, 2008 84 Table D -9 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January -December, 2008 91 Table D -10 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January -December, 2008 93 Table D -11 Annual x/Q, x/Q depleted and D/Q values for the North Stack, Limerick Generating Station, 2008 95 Table D -12 Annual x/Q, x/Q depleted and D/Q values for the South Stack, Limerick Generating Station, 2008 97 Page 33 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC (Page Intentionally Left Blank)Page 34 SITE: LICENSEE: Table D -LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC 1 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January -March, 2008 Period of Record: January -March 2008 Class -Extremely Unstable -171Ft-26Ft Stability Delta-T (F)Winds Measured at 30 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 2 0 1 2 0 1 3 5 0 4 0 4 5 2 0 8-12 13-18 19-24 > 24 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 0 0 0 8 0 0 0 3 0 0 0 0 0 0 0 7 3. 0 0 7 6 0 0 6 4 0 0 8 1 0 0 0 0 0 0 Total 1 0 2 0 1 2 0 1 7 13 3 4 10 18 15 11 0 Total 1 29 44 14 0 0 88 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 6 Page 35 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -1 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January -March, 2008 Period of Record: January -March 2008 Class -Moderately Unstable -171Ft-26Ft Stability Delta-T (F)Winds Measured at 30 Feet Wind Direction Wind Speed (in mph)8-12 13-18 19-24 > 24 Total 1-3 4-7 N NNE NE ENE E ESE SE SSE S SSW SW WSW 0 0 0 0 0 0 0 0 0 0 0 0 3 3 0 1 4 4 0 1 1 2 2 3 W WNW NW 2 0 0 0 0 2 5 8 3 0 6 6 2 4 0 0 1 0 12 0 15 0 34 0 10 9 16 5 0 1 0 Variable Total 1 0 2.0 0 3 31 35 24 0 95 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 6 Page 36 SITE: LICENSEE: Table D -LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC 1 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January -March, 2008 Period of Record: January -March 2008 Stability Class -Slightly Unstable Winds Measured at Delta-T (F)-17lFt-26Ft 30 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 2 1 0 0 1 0 1 1 0 0 0 1 0 0 0 1 0 2 0 1 1 3 2 2 1 2 0 1 3 3 11 5 1 0 8-12 13-18 19-24 > 24 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 5 2 0 0 6 3 0 0 16 19 5 0 5 1 0 0 0 0 0 0 Total 5 1 1 1 6 3 3 3 2 2 1 4 10 20 45 8 0 Total 8 38 38 26 5 0 115 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 1 all stability classes: 6 Page 37 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -1 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January -March, 2008 Period of Record: January -March 2008 Stability Class -Neutral -17lFt-26Ft Winds Measured at 30 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 16 16 8-12 13-18 19-24 > *24 Total N NNE NE ENE E ESE SE SSE S SSW 21 22 6 4 7 0 0 1 20 24 15 41 22 7 15 4 14 6 2 7 7 7 5 2 5 7 2 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 40 0 27 0 26 0 45 0 78 0 29 0 23 0 15 0 14 0 21 0 13 0 15 0 51 0 130 0 290 0 97 3 11 SW 3 7 8 8 WSW W WNW 3 13 23 11 17 23 70. 20 NW 12 69 114 78 17 NNW Variable Total 11 22 45 19 0 169 0 288 0 310 0 129 0 0 18 0 0 0 914 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 5 stability class: 0 all stability classes: 6 Page 38 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -1 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January -March, 2008 Period of Record: January- March 2008 Stability Class -Slightly Stable -171Ft-26Ft Winds Measured at 30 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 11 14 9 14 8-12 13-18 19-24 > 24 Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W 3 1 0 0 11 1i 6 7 15 27 10 4 8 10 13 3 14 3 1 7 0 0 0 0 0 0 0 2 0 0 2 1 4 7 26 16 11 12 25 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 28 0. 24 0 17 0 18 0 52 0 15 0 24 0 26 0 49 0 48 0 26 0 41 0 68 0 101 0 76 0 35 11 29 9 8 4 3 24 30 10 WNW NW NNW Variable Total 32 60 9 14 48 10 15 17 2 0 0 4 1 0 14 0 217 0 0 0 313 104 0 648 Hours of calm in this stability class: 12 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability classes: 6 Page 39 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -1 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January -March, 2008 Stability Period of Record: January -March 2008 Class -Moderately Stable -l7lFt-26Ft Winds Measured at 30 Feet Delta-T (F)Wind Direction N NNE NE ENE Wind Speed (in mph)1-3 4-7 8-12 13-18 19-24 > 24 Total 13 4 9 6 1 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 14 0 0 0 4 9 6 E 8 0 11 0 11.ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 10 5 6 3 3 9 9 11 18 18 10 0 142 1 0 2 6 2 1 1 2 4 1 2 0 26 0 0 0 0 6 8 9 5 0 10 0 10 0 13 0 22 0 19 0 13 0 0 0 170 Hours of calm in this stability class: 13 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 6 Page 40 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -1 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January -March, 2008 Period of Record: January -March 2008 Stability Class -Extremely Stable Winds Measured at-171Ft-26Ft 30 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N NNE NE ENE 9 3 4 1 3 4 0 9 E ESE SE 7 0 0 0 0 0 0 0 0 0 0 0 0 4 1 9 3 4 3 SSE S SSW SW WSW W 1 0 4 2 6 9 1 0 4 2 6 9 WNW NW NNW Variable Total 16 8 14 0 91 0 1 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 16 0 0 0 9 14 0 0 94 Hours of calm in this stability class: 17 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 6 Page 41 SITE: LIMERICK GENERATING STATION -UNITS 1 &?2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -2 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January -March, 2008 Stability Period of Record: January -.March 2008 Class -Extremely Unstable -171Ft-26Ft Winds Measured at 175 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N NNE 0 0 0 NE ENE E ESE SE SSE S SSW SW WSW W WNW NNW Variable 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 2 0 1 0 0 1 2 1 1 0 0 3 0 2 0 0 0 0 0 1 1 0 1 4 6 1 2 2 8 3 3 0 0 0 0 0 0 0 0 0 2 6 0 3 5 5 0 6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0 0 0 2 8 0 0 2 0 2 1 0 1 0 2 2 5 1 0 0 0 14 0 2 1 8 3 12 0 22 0 4 0 11 0 0 Total 1 13 32 27 11 4 88 Hours of calm in this Hours of missing wind Hours of missing stab: stability class:.measurements in this ility measurements in 0 stability class: 0 all stability classes: 6 Page 42 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -2 wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January -March, 2008 Stability Period of Record: January -Class -Moderately Unstable Winds Measured at 175 March 2008-171Ft-26Ft Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 0 0 0 0 0 0 0 0 0 0 0 0 1 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 0 0 3 1 0 1 4 3 2 1 0 0 0 0 0 3 1 7 0 0 0 0 3 1 3 0 6 7 3 0 8 2 2 0 8 5 0 0 1 18 2 27 1 16 0 0 8 0 1 19 29 21 21 4 95 Hours of calm in Hours of missing Hours of missing this stability class: 0 wind measurements in this stabi stability measurements in all s lity class: 0 tability classes: 6 Page 43 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -2 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January -March, 2008 Stability Period of Record: January -March 2008 Class -Slightly Unstable -171Ft-26Ft Winds Measured at 175 Feet Delta-T (F)Wind Direction N NNE NE ENE Wind Speed (in mph)1-3 4-7 8-12 13-18 19-24 > 24 Total 1 0 0 1 0 0 0 0 E ESE 0 0 0 0 0 0 0 0 0 0 0 0 5 3 4 2 3 2 4.0 1 SE SSE S SSW SW WSW W 1 0 0 0 0 3 3 7 1 NW NNW Variable Total 0 1 0 3 3 1 0 8 5 10 2 16 2 29 3 28 5 10 2 0 2 0 7 0 0 0 6 0 0 5 25 31 25 23 7 116 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 Page 44 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -2 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January -March, 2008 Period of Record: January -March 2008 Stability Class -Neutral -171Ft-26Ft Winds Measured at 175 Feet Delta-T (F)Wind Direction Wind Speed (in mph)4-7 8-12 13-18 19-24 > 24 Total 1-3 N NNE NE ENE-E ESE SE SSE S SSW SW WSW W WNW 5 16 12 19 11 16 5 0 1 8 24 21 8 30 29 2 10 12 0 31 0 31 0 28 0 55 0 74 0 27 0 24 0 18 0 20 0 18 0 16 1 20 3 1 3 1 3 3 15 9 5 6 5 1 10 6 6 6 6 3 4 0 0 3 10 9 35 24 12 93 5 14 48 89 44 16 216 NW NNW Variable Total 8 22 41 57 *23 7 158 0 87 5 13 33 29 7 0 0 0 24.7 0 251 0 0 0 79 204 99 36 916 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 3 all stability classes: 6 Page 45 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -2 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January -March, 2008 Stability Period of Record: January -March 2008 Class -Slightly Stable -171Ft-26Ft Winds Measured at 175 Feet Delta-T (F)Wind Direction Wind Speed (in mph)4-7 8-12 13-18 19-24 > 24 1-3 Total N 3 9 17 NNE NE 1 6 4 5 4 17 7 1 6 ENE 2 2 0 0 9 1 3 7 0 0 0 0 0 0 0 E 4 16 23 ESE 2 7 SE 1 13 6 7 8 SSE S SSW SW WSW W WNW NW NNW Variable Total 1 4 2 12 27 21 2 9 13 12 3 18 11 1 14 12 3 3 2 17 31 17 3 33 57 12 1 7 7 5 2 2 0 1 0 0 25 0 31 0 16 0 10 0 27 0 52 0 16 0 24 1i 22 0 69 1 44 2 42 2 34 0 69 2 107 0 63 0 29 3 11 41 3 12 12 7 2 0 101 0 0 0 279 0 0 39 203 8 655 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 1 stability class: 7 all stability classes: 6 Page 46 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -2 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station;January -March, 2008 Period of Record: January -March 2008 Stability Class -Moderately Stable -171Ft-26Ft Delta-T (F)Winds Measured at 175 Feet Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 6 1 0 0 0 10 NNE 3 2 4 0 0 0 9 NE 3 2 0 0 0 0 5 ENE 3 3 0 0 0 0 6 E 2 6 2 0 0 0 10 ESE 2 4 0 0 0 0 6 SE 1 4 0 0 0 0 5 SSE 6 6 1 1 0 0 14 S 1 8 3 0 0 0 12 SSW 5 7 6 0 0 0 18 SW 3 5 4 1 0 0 13 WSW 0 7 2 2 0 0 11 W 3 8 5 0 0 0 16 WNW 2 10 5 0 0 0 17 NW 1 13 4 0 0 0 18 NNW 4 6 3 0 0 0 13 Variable 0 0 0 0 0 0 0 Total 42 97 40 4 0 0 183 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: 6 Page 47 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -2 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January -March, 2008 Stability Period of Record: January -March 2008 Class -Extremely Stable -17lFt-26Ft Winds Measured at 175 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 6 0 0 0 0 9 NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW 0 11 0 0 0 0 0 0 0 0 0 4 4 2 2 4 3 7 7 8 0 15 0 7 0 13 0 10 NW NNW Variable Total 4 3 0 4 2 0 2 1 0 0 0 0 1 0 0 0 0 0 0 6 0 44 57 10 0 112 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 1 stability class: 0 all stability classes: 6 Page 48 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -3 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, April -June, 2008 Period of Record: April -June 2008 Stability Class -Extremely Unstable -171Ft-26Ft Winds Measured at 30 Feet Delta-T (F)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 0 0 0 0 0 0 0 0 1 1 0 0 0 2 1 1 0 0 0 0 0 0 0 0 0 0 10 3 0 2 4 6 0 4 8 SSW SW WSW W WNW 0 11 0 0 0 4 8 5 NW NNW Variable Total 8 12 3 11 3 0 0 7 0 0 0 0 0 16 0 24 0 15 0 0 0 0 6 49 58 stability class: measurements in this 0 120 Hours of calm in this Hours of missing wind 0 stability class: 0 all stability classes: Hours of missing stability measurements in Page 49 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -3 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, April -June, 2008 Stability Period of Record: April -June 2008 Class -Moderately Unstable -l7lFt-26Ft-Winds Measured at 30 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N NNE NE ENE E 0 0 1 0 0 0 0 0 1 ESE SE 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 1 1 0 6 6 2 1 2 8 4 SSE S SSW SW WSW W WNW 0 0 0 1 0 3 1 0 1 2 8 NW NNW Variable Total 4 16 0 0 4 0 2 4 0 8 0 0 0 0 0 25 0 0 9 0 7 28 39 0 82 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 0 stability class: 0 all stability classes: 1 Page 50 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -3 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, April -June, 2008 Stability Period of Record: April -June 2008 Class -Slightly Unstable -171Ft-26Ft Delta-T (F)Winds Measured at 30 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE 1-3 0 0 0 0 0 1 0 1 0 1 0 2 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 5 2 0 4 0 19 SE SSE S SSW SW WSW W WNW 0 0 0 0 0 0 0 0 9 4 1 2 5 7 4 8 2 0 0 0 5 5 5 11 NNW Variable Total 1 0 1 0 0 2 2 0 8 0 0 0 0 0 0 0 0 12 0 18 4 0 7 43 46 0 104 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 0 stability class: 0 all stability classes: 1 Page 51 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -3 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, April -June, 2008 Period of Record: April -June 2008 Stability Class -Neutral -17lFt-26Ft Delta-T (F)Winds Measured at 30 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 5 9 17 20 3.ý6 5 8 6 9 6 12 11 12 14 5 0 15 14 16 26 50 14 5 7 14 27 36 36 37 39 49 23 0 19 3 1 14 53 10 0 1 5 15 2 1 2 9 41 23 0 199 0 0 0 5 8 6 0 0 0 1 1 0 0 0 13 4 0 38 0 00 0 0 0 0 0 0 0 0 0 0 3 0 0 39 26 34 65 114 36 10 16 25 52 45 49 50 60 120 55 0 Total 148 408 3 0 796 Hours of calm in this stability class: 7 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 1 Page 52 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -3 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, April -June, 2008 Stability Period of Record: April -June 2008 Class -Slightly Stable -171Ft-26Ft Delta-T (F)Winds Measured at 30 Feet Wind Direction Wind Speed (in mph)1-3 4-7 8-12 13-18 19-24 > 24 Total N 7 20 17 NNE NE ENE E ESE SE SSE 8 13 7 4 15 17 8 15 0 1 6 8 7 0 1 4 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 3 6 7 6 6 10 6 25 0 44 0 15 0 18 0 41 0 31 0 17 0 12 0 17 0 35 0 36 0 33 0 33 0 48 0 66 0 76 0 29 S SSW SW WSW W WNW NW NNW 6 19 10 21 11 18 15 27 19 30 34 1 0 2 0 24 36 16 14 0 Variable 8 0 253 7 0 80 0 0 Total 212 0 551 Hours of calm in this stability class: 13 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability cli 4 asses: 1 Page 53 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -3 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station,.April -June, 2008 Period of Record: April -June 2008 Stability Class -Moderately Stable Winds Measured at-171Ft-26Ft 30 Feet Delta-T (F)Wind Direction N NNE NE ENE E ESE SE SSE Wind Speed (in mph)1-3 4-7 8-12 13-18 19-24 > 24 Total 9 2 8 6 0 1 3 1 4 0 2 0 0 1 1 1 2 9 S 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 3 4 3 9 4 8 6 SSW SW WSW W WNW NW NNW Variable Total 6 15 15 29 32 25 16 0 172 5 3 0 0 2 3 2 0 31 0 13 0 11 0 18 0 15 0 29 0 34 0 28 0 18 0 0 0 204 Hours of calm in this stability class: 28 Hours of missing Hours of missing wind measurements in this stability class: stability measurements in-all stability cl 7 asses: 1 Page 54 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -3 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, April -June, 2008 Period of Record: April -June 2008 Class -Extremely Stable -17lFt-26Ft Delta-T (F)Stability Winds Measured at 30 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 11 6 6 2 5 4 4 2 7 10 18 13 14 34 26 11 0 1 0 1 0 1 0 0 0 5 7 0 0 0 0 3 1 0 8-12 13-18 19-24 > 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total 12 6 7 2 6 4 4 2 12 17 18 13 14 34 29 12 0 Total 173 19 0 0 0 0 192 Hours of calm in this stability class: 63 Hours of missing wind measurements in this stability class: 12 Hours of missing stability measurements in all stability classes: 1 Page 55 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -4 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, April -June, 2008 Period of Record: April -June 2008 Stability Class -Extremely Unstable -l7lFt-26Ft Delta-T (F)Winds Measured at 175 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 10 2 0 5 2 5 0 4 12 8 5 9 13 20 16 9 0 Total 3 20 53 37 7 0 120 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: I Page 56 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -4 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, April -June, 2008 Stability Period of Record: April -Class -Moderately Unstable Winds Measured at 175 June 2008-171Ft-26Ft Feet Delta-T (F)Wind Direction N NNE NE ENE E ESE Wind Speed (in mph)1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 7 5 2 5 SSE 1 S SSW SW WSW 3 7 4 2 5 W 1 WNW NW NNW Variable Total 0 2 0 0 3 10 1 1 0 2 2 0 6 6 3 0 1 3 0 0 5 0 20 0 14 0 0 6 0 3 14 37 23 0 82 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 0" stability class: 0 all stability classes: Page 57 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -4. Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, April -June, 2008 Period of Record: April -Stability Class -Slightly Unstable Winds Measured at 175 June 2008-171Ft-26Ft Feet Delta-T (F)Wind Direction N NNE NE ENE E ESE SE Wind Speed (in mph)1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 0 0 SSE S 1 2 0 0 2 6 3 2 1 2 1 0 1 1 0 1 0 0 3 1 0 4 4 5 0 0 0 1 3 3 3 0 0 0 1 7 0 0 0 0 4 0 2 2 0 0 0 0 1 0 0 0 0 1 2 0 3 1 1 1 0 0 0 8 2 0 0 0 0 0 1 5 1 0 7 0 18 SSW SW WSW W WNW NW 1 0 0 2 1 1 0 0 0 0 0 0 3 8 5 6 0 11 0 18 6 10 2 1 0 3 1 0 0 0 0 8 3 Variable Total 0 6 22 36 30 10 0 104 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 0 stability class: 0 all stability classes: 1 Page 58 SITE: LICENSEE: Table D -LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC 4 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, April -June, 2008 Stability Period of Record: April -June 2008 Class -Neutral -171Ft-26Ft Winds Measured at 175 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 N 2 NNE 5 NE 4 ENE 3 E 3 ESE 2 SE 4 SSE 2 S 3 SSW 2 SW 2 WSW 5 W 7 WNW 2 NW 6 NNW 1 Variable 0 12 7 21 24 17 11 5 3 10 14 15 19 18 23 15 6 0 8-12 13-18 19-24 > 24 19 7 0 0 9 3 0 0 10 1 5 0 36 15 0 0 44 33 6 0 11 3 2 0 3 0 0 0 4 1 0 0 18 7 0 0 20 13 4 0 29 4 0 0 24 12 0 0 34 15 1 0 30 17 0 4 26 26 4 0 19 11 0 0 0 0 0 0 Total 40 24 41 78 103 29 12 10 38 53 50 60 75 76 77 37 0 Total 53 220 336 168 22-4 803 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: all stability cl 0 asses: 1 Page 59 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -4 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, April -June, 2008 Period of Record: April -June 2008, Stability Class -Slightly Stable -171Ft-26Ft Winds Measured at 175 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 10 9 9 13 12 6 4 2 9 10 9 13 20 26 10 4 0 19 4 7 12 12 4 7 8 26 11 17 18 30 44 23 13 0 10 1 2 4 5 6 1 3 8 13 2 3 5 10 6 4 0 83 40 17 24 35 33 19 13 16 46 37 32 45 60 85 43 23 0 Total 53 166 255 9 2 568 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: 1 Page 60 SITE: LICENSEE: Table D -LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC 4 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, April -June, 2008 Stability Period of Record: April -June 2008 Class -Moderately Stable -171Ft-26Ft Winds Measured at 175 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE 1-3 1 2 3 2 1'2 2 0 4-7 8-12 13-18 19-24 > 24 Total 3 3 3 3 4 1 2 2 7 3 2 0 3 0 0 2 5 9 6 6 8 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 11 0 0 .0 0 0 0 0 0 0 0 0 0 0 8 8 5 8 3 5 4 S SSW SW WSW W WNW 1 1 5 9 2 14 2 15 7 16 0 11 0 20 0 22 0 23 0 31 0 49 0 23 2 29 18 4 12 7 3 NNW Variable Total 1 0 3 0 0 0 7 0 0 33 124 79 2 0 238 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 1.stability class: 0 all stability classes: 1 Page 61 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -4 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, April -June, 2008 Stability Period of Record: April -June. 2008 Class -Extremely Stable -l7lFt-26Ft Delta-T (F)Winds Measured at 175 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE 1-3 4-7 8-12 13-18 19-24 > 24 Total 3 2 3 6 4 E 7 2 2 3 5 1 0 3 4 6 0 1 1 0 0 0 3 5 ESE 2 SE SSE 4 0 4 2 S SSW SW WSW W WNW NW NNW Variable.Total 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 6 0 10 0 16 0 0 0 0 9 3 4 6 6 10 4 14 10 6 13 5 18 9 2 0 13 0 18 0 28 0 28 0 25 0 52 0 29 0 16 6 24 22 1 19 2 11 9 3 0 81 0 0 0 0 54 132 0 267 Hours of calm in Hours of missing Hours of missing this stability class: 0 wind measurements in this stabi stability measurements in all s lity class: 0 tability classes: 1 Page 62 SITE: LICENSEE: Table D -LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC 5 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, July -September, 2008 Period of Record: July -September 2008 Class -Extremely Unstable -171Ft-26Ft Stability Delta-T (F)Winds Measured at 30 Feet Wind Speed (in mph)Wind Directio: N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 4 4 0 0.0 1 1 1 0 5 14 14 15 9 7.3 0 8-12 13-18 19-24 > 24 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total 5 4 0 0 0 1 1 1 5 5 15 14 15 11 7 3 0 Total 2 78 7, 0 0 0 87 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 31 Page 63 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -5 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, July -September, 2008 Period of Record: July -September 2008 Stability.

Class -Moderately Unstable -171Ft-26Ft Delta-T (F)Winds Measured at 30 Feet Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 7 NNE NE ENE E ESE SE SSE S SSW SW WSW 0 5 0 0 2 0 0 1 0 0 0 0 0 0 0 0 0 0 2 9 W 4 2 2 9 7 6 0 0 2 WNW NW NNW Variable Total 0 11 0 0 4 0 3 4 0 12.0 0 0, 0 0 0 0 0 0 0 0 0 0 0 0 0 13 0 10 0 14 9 0 0 8 0 8 60 0 80 Hours of calm in Hours of missing Hours of missing this stability class:.wind measurements in this stability measurements in 0 stability class: 0 all stability classes: 31 Page 64 SITE: LICENSEE: Table D -LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC 5 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, July -September, 2008 Stability Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Period of Record: July -Class -Slightly Unstable Winds Measured at Wind Speed September 2008-171Ft-26Ft 30 Feet (in mph)Delta-T (F)1-3 4-7 2 0 0 1 0 0 0 0 0 1 1 1 3 2 1 0 0 3 7 4 5 7 2 1 2 3 1 5 13 8 6 10 5 0 8-12 13-18 19-24 > 24 3 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0.0 0 0 0 1 0 0 0 1 0 0 0 4 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 13 0 0 0 11 2 0 0 0 0 0 0 Total 8 7 4 6 9 2 1 2 4 3 10 14 11 9 24 18 0 Total 12 82 36 2 0 0 132 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: 31 Page 65 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -5 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, July -September, 2008 Period of Record: July -Stability Class -Neutral Winds Measured at September 2008-171Ft-26Ft Delta-T 30 Feet (F)Wind Speed (in mph)I 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 12 7 7 12 10 11 7 13 5 17 2 19 3 8 5 4 4 2 3 7 2 1 0 0 7 1 4 0 0 6 14 17 26 16 31 20 27 19 11 18 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 23 0 21 0 24 0 27 0 24 0 22 0 12 0 27 0 44 0 48 0 51 0 30 0 42 0 107 0 68 8 19 52 35.15 31 22 Variable Total 0 184 0 304 0 89 0 0 0 578 Hours of calm'in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 2 all stability classes: 31 Page 66 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -5 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, July -September, 2008 Period of Record: July -September 2008 Stability Class -Slightly Stable -171Ft-26Ft Winds Measured at 30 Feet Wind Speed (in mph)Delta-T (F)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NN NNV Variable 1-3 4-7 8-12 13-18 19-24 > 24 32 26 19 16 16 12 9 14 12 23 15 28 29 56 69 24 0 13 25 16 24 24 4 4 12 46 16 3 12 2 11 32 17 0 Total 46 52 41 40 40 19 13 26 60 49 19 41 31 68 105 44 0 Total 400 261 33 0 0 0 694 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 9 stability class: 1 all ,stability classes: 31 Page 67 SITE: LICENSEE: Table D -LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC 5 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, July -September, 2008 Stability Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW WNW NNW Variable Period of Record: July -Class -Moderately Stable Winds Measured at Wind Speed September 2008-171Ft-26Ft Delta-T 30 Feet (in mph)1-3 4-7 25 10 12 6 4 6 0 4 3 10 15 11 24 58 48 31 0 0 3 3 0 3 1 0 1 2 7 2 1 1 4 8 0 0 8-12 13-18 19-24 > 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (F)Total 25 13 15 6 7 7 0 5 5 17 17 12.25 62 56 31 0 Total 267 36 0 0 0 0 303 Hours of calm in this stability class: 18 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability cl 0 asses: 31 Page 68 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -5 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, July -September, 2008 Period of Record: July -SeptembE Stability Class -Extremely Stable -17 Winds Measured at 30 Feet Wind Speed (in mph)er 2008 LFt-26Ft Delta-T (F))I Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 13 13 9 10 7 2 0 1 2 7 14 12 16 47 55 44 0 13 13 9 10 7 2 0 1 3 9 17 12 16 47 55 44 0 Total 252 6 0 0 0 0 258 Hours of calm in this stability class: 15 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 31 Page 69 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -6 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, July -September,2008 Stability Period of Record: July -September 2008 Class -Extremely Unstable -17lFt-26Ft Winds Measured at 175 Feet Delta-T (F)Wind Direction N NNE NE ENE E Wind Speed (in mph)1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 2 1 0 0 0 0 4 1 0 0 0 1 0 0 2 8 ESE SE 0 11 SSE 0 0 1 S SSW SW WSW W WNW NW NNW Variable Total 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 1 1 3 0 0 0 0 0 9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 6 2 0 0 0 0 7 1 1 10 3 13 2 11 0 10 0 12 0 19 0 13 0 12 8 2 0 0 4 1 1 0 0 3 1 0 0 0 0 22 56 0 87 Hours of calm in Hours of missing Hours of missing this stability class: 0 wind measurements in this stabil stability measurements .in all st ity class: 0 ability classes: 31 Page 70 SITE: LICENSEE: Table D -LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC 6 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, July -September, 2008 Period of Record: July -September 2008 Stability Class -Moderately Unstable -171Ft-26Ft Winds Measured at 175' Feet Deita-T (F)Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 0 0 0 0 0 0 0 0 0 0 0 4-7 8-12 13-18 19-24 > 24 Total 2 5 1 0 0 0 0 0 4 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 5 1 1 0 0 0 0 0 8 7 0. 0 3 4 0 11 0 0 0 0 0 6 5 3 2 0 5 2 5 3 7 4 2 0 0 1 2 0 0 0 4 0 0 1 0 0 0 1 0 16 0 10 0 15 0 0 0 7 4 0 0 42 33 0 80 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 0 stability class: 0 all stability classes: 31 Page 71 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -6 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, July -September, 2008 Stability Period of Record: July -September 2008 Class -Slightly Unstable -171Ft-26Ft Winds Measured at 175 Feet Delta-T (F)Wind Direction N NNE NE ENE Wind Speed (in mph)1-3 4-7 8-12 13-18 19-24 > 24 Total 1 0 0 0 0 0 0 0 E ESE SE 3 2 3 1 3 1 1 0 3 0 5 6 8 6 0 0 0 0 0 0 0 0 0 0 8 6 6 5 8 2 2 SSE 1 S 0 4 3 SSW SW WSW W 0 0 0 2 1 0 0 0 7 5ý6 WNW NW NNW Variable Total 1 0 3 5 4 0 5 14 0 0 0 0 0 0 0 0 13 0 14 0 15 0 16 0 24 1 0 0 0 0 0 5 0 4 48 60 20 0 132 Hours of calm in Hours of missing Hours of missing this stability class: 0 wind measurements in this stability class: 0 stability measurements in all stability classes: 31 Page 72 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D- 6 Wind.Speed by Direction Measured at 175 Feet. for Various Stability Classes for the Limerick Generating Station, July -September, 2008 Period of Record: July -September 2008 Stability Class -Neutral -171Ft-26Ft Winds Measured at 175 Feet Delta-T (F).Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3. 4-7 8-12 13-18 19-24 > 24 Total 9 7 2 7 2 0 3 3 1 7 8 9 5 14 8 6 0 3 8 10 11 8 6 6 11 9 13 26 16 20 33 17 6 0 10 8 12 8 9 10 6 4 11 19 22 25 12 29 44 9 0 2 0 3 1 0 1 0 0 10 0 8 0 0 9 10 1 0 45 0 0 0 0 0 0 0 0-0 0 0 0 0 0 0 0 0 24 23 27 27 19 17 15 18 31 39 64 50 37 86 79 22 0 Total 91 203 238 1 0 578 Hours of calm in this stability class: Hours of missing wind measurements in this 0 stability class: 2 all stability classes: Hours of missing stability measurements in 31 Page 73 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -6 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, July -September, 2008 Stability.

Period of Record: July -September 2008 Class -Slightly Stable -171Ft-26Ft Winds Measured at 175 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N NNE NE ENE 14 15 16 10 14 20 13 9 17 5 25 18 E ESE SE.SSE S SSW SW WSW W WNW 4 11 9 8 16 5 8 7 2 1 2 4 0 2 1 1 0 8 5 2 2 2 5 0 0 0 0 0 0 0 0 0 2 0 0 0 0 2 17 13 1 16 42 7 15 10 2 14 18 5 21 10 0 46 0 46 0 43 0 48 0, 30 0 24 0 20 0 32 0 67 0 39 0 36 0 38 0 36 0 105 0 64 0 28 8 19 7 8 61 31 20 27 15 NW 2 ý 0 NNW Variable Total 11 15 0 130 0 289 2 0 244 0 0 37 0 0 2 0 0 0 702 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 1 stability class: 1 all stability classes: 31 Page 74 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY,-LLC Table D -6 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, July -September, 2008 Period of Record: July -September 2008 Stability Class -Moderately Stable -171Ft-26Ft Winds Measured at 175 Feet Wind Speed (in mph)Delta-T (F)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 6 6 2 6 4 3 3 3 2 8 4 3 2 3 5 3 3 6 8 0 4 5 0 1 1 0 0 5 7 7 6 4 0 0 0 0 0 1 0 0 0 3 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 14 0 14 0 10 0 0 8 8 0 10 0 0 6 6 1 2 13 5 13 3 14 0 13 0 19 0 23 0 24 0 21 0 77 0 50 0 17 8 44 25 10 32 8 8 0 9 0 Variable Total 0 0 73 0 0 72 170 0 320 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 1 stability class: 0.all stability classes: 31 Page 75 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -6 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, July -September, 2008 Stability Period of Record: July -September 2008 Class -Extremely Stable -17lFt-26Ft Winds Measured at 175 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW-W WNW NW NNW Variable Total 1-3 4 2 2 2 2 6 1 1 2 4-7 8-12 13-18 19-24> 24 Total 4 4 6 4 1 1 2 2 1 0 1 0 0 0 0 0 0 3 4 0 0 0 0 0 0.0 0*0 0 1 0 0 0 1 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8 7 8 6 3 7 3 3 4 5 11 7 18 5 12 6 15 0 25 0 28 0 21 0 21 0 81 0 28 0 20 9 51 20 3 19 4 15 6 1 0 44 0 0 0 0 61 166 0 273 Hours of calm in Hours o.f missing Hours of missing this stability class: 0 wind measurements in this stabil stability measurements in all st ity class: ability cl 0 asses: 31 Page 76 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -7 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, October -December, 2008 Period of Record: October -December2008 Stability Class -Extremely Unstable -17lFt-26Ft Delta-T (F)Winds Measured at 30 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12. 13-18 19-24 > 24 Total 0 1 2 0 0 0 0 0 5 1 1 6 4 10 4 0 0 Total 2- 19 12 1 0 0 34 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5 Page ,77 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -7 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, October -December, 2008 Period of Record: October -December2008 Stability Class -Moderately Unstable -17lFt-26Ft Winds Measured at 30 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NE ENE E 1-3 0 0 0 0 1 4-7 8-12 13-18 19-24 > 24 Total ESE SE SSE S SSW SW WSW W WNW NW 0 0 0 1 0 2 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 6 3 3 7 3 2 3 0 6 6 0 6 1 0 0 7 0 0 0 0 0 0 11 0 15 0 10 0 0 3 0 Variable Total 0 6 27 22 0 62 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 0 stability class: 0 all stability classes: 5 Page 78 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -7 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, October -December, 2008.Stability Period of Record: October Class -Slightly Unstable Winds Measured at-December2008

-17iFt-26Ft 30 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW 1-3 0 0 1 1 0 0 0 0 0 0 1 1 4-7 8-12 13-18 19-24 > 24 Total 0 8 0 12 0 0 0 0 0 0 0 0 0 0 3 1 0 0 2 0 3 5 1 2 W 4 0 7-2 WNW 9 11 2 11 10 0 6 9 2 0 0 1 2 0 0 3 0 13 0 27 1 35 NNW Variable Total 0 0 2 0 2 0 0 0 6 0 10 54 33 17 1 118 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: 5 Page 79 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -7 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, October -December, 2008 Stability Wind Direction Period of Record: October Class -Neutral Winds Measured at-December2008

-l7lFt-26Ft 30 Feet Delta-T (F)1-3 N 14 NNE 9 NE 14 ENE 13 E 10 ESE 4 SE 9 SSE 5'.S 9 SSW 12 SW 14 WSW 7 W 12 WNW 21 NW 17 NNW 11 Variable 0 Wind Speed (in mph)4-7 8-12 13-18 28 11 0 38 17 0 20 1 0 20 2 0 9 3 0 10 1 0 3 3 0 17 4 0 24 3 0 15 11 3 3 3 0 8 3 0 38 19 8 52 40 14 46 91 44 15 7 9 0 0 0 19-24 0 0 0 0 0 0 0 0 0 0 0 0 0 1 10 0 0> 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 Total 53 64 35 35 22 15 15 26 36 41 20 18 77 128 209 42 0 Total 181 346 219 78 11 1 836 Hours of calm in this stability class: 1 Hours of missing Hours of missing wind measurements in this stabil stability measurements in all st ity class: ability cl 0 asses: 5 Page 80 SITE: LIMERICK GENERATING STATION -UNITS 1 &2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -7 Wind Speed by Direction, Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, October -December, 2008 Period of Record: October -December2008 Stability.Class

-Slightly Stable -171Ft-26Ft Winds Measured at 30 Feet Delta-T (F)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 18 11 18 18 8 8 17 15 1 8 5 2 2 3 8 5 3 4 9 9 5 3 9 12 0 0 0 0 0 0 0 1 3 0 1 0 1 7 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 30 0 44 0 21 0 34 0 0 12 -26 13 14 12 16 20 22 8 9 5 2 0 20 0 27 0 54 0 45 0 36 0 52 0 94 31 19 W 40 35 18 49 51 15 19 32 14 0 .0 122 NNW Variable Total 14 0 289 6 0 278 0 0 110 0 0 17 0 0 0 0 0 69 0 20 0 0 0 694 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 6 stability class: 2 all stability classes: 5 Page 81 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC, Table D -7 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, October -December, 2008 Stability Period of Record: October Class -Moderately Stable Winds 'Measured at-December2008

-l7lFt-26Ft 30 Feet Delta-T (F)Wind Direction N NNE NE ENE E ESE SE Wind Speed (in mph)1-3 4-7 8-12 13-18 19-24 > 24 Total ii 7 3 5 1 6.2 3 2 5 0 0 1 4 1 1 3 SSE S 3 0 0 0 0 0 0 0 0 0 0 1 0 0.0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0-0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0 0 0 10 0 0 0 3 4 6 0 13 0 12 0 0 0 3 5 2 SSW SW WSW W WNW NW NNW Variable Total 4 6 19 29 36 20 14 0 169 8 6 1 5 6 2 0 0 45 0 12 0 13 0 20 0 34 0 42 0 22 0 14 0 0 0 215 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 4 stability class: 1 all stability classes: 5 Page 82 SITE: LICENSEE: Table D -LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC 7 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, October -December, 2008 Period of Record: October Stability Class -Extremely Stable Winds Measured at Wind Speed Wind-December2008

-l7lFt-26Ft 30 Feet (in mph)Delta-T (F)Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 4-7 8-12 13-18 19-24 > 24 21 0 0 0 0 0 10 0 0 0 0 0 12 0 0 0 0 0 7 0 0 0 0 0 4 0 0 0 0 0 3 0 0 0 0 0 7 0 0 0 0 0 3 1 0 0 0 0 4 0 0 0 0 0 6 0 0 0 0 0 2 0 1 0 0 0 10 0 0 0 0 0 14 1 0 0 0 0 40 0 0 0 0 0 40 0 0 0 0 0 26 0 0 .0 0 0 0 0 0 0 0 0 Total 21 10 12 7 4 3 7 4 4 6 3 10 15 40 40 26 0 209 2 1 0 0 o 0 212 Hours of calm ift this stability class: 18 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 5 Page 83 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -8 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, October -December, 2008 Stability Period of Record: October -December2008 Class -Extremely Unstable -17lFt-26Ft Winds Measured at 175 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N NNE NE ENE 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E ESE SE SSE S 0, 0 0 2 1 0 0 0 0 1 2 1 4 3 4 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 1 0 0 0 0 1 4 SSW SW WSW 0 0 0 0 0 0 0 0 0 0 0 0 1 2 1 0 0 1 4 4 1 10 NW NNW Variable Total 0 0 0 0 5 2 0 0 4 21 1 34 Hours of calm in Hours of missing Hours of missing this stability class: 0 wind measurements in this stabi stability measurements in all s lity class: tability cl 0 asses: 5 Page 84 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -8 Wind. Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, October -December, 2008 Period of Record: October -December2008 Stability Class -Moderately Unstable -171Ft-26Ft Winds Measured at 175 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW 1-3 0 0 0 0 0 1 0 0 0 0 1 0 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 0 0 0 0 0 0 2 4 1 0 0 1 0 0 2 6 3 7 NW 0 0 0 1 0 2 1 1 2 0 4 4 4 1 0 1 4 1 0 0 3 3 0 0 0 6 0 0 0 6 0 10 3 15 4 Variable Total 0 3 13 25 11 this stability class: 0 wind measurements in this stabi stability measurements in all s 3 61 Hours of calm in Hours of missing Hours of missing lity class: 1 tability classes: 5 Page 85 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -8 Wind Speed by Direction Measured.

at 175 Feet for Various Stability Classes for the Limerick Generating Station, October -December, 2008 Period of Record: October -December2008 Stability Class -Slightly Unstable -171Ft-26Ft Winds Measured at 175 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 NNE NE 1 ENE E 0 0 0 0 ESE SE 1 3 0 0 0 0 0 0 1 3 0 2 7 0 0 0 0 0 0 0 0 0 0 6 6 1 1 0 0 2 " SSE 0 S SSW SW WSW W 0 0 0 1 0 0 3 4 1 2 3 4 6 2 3 0 0 0 5 0 0 5 0 6 5 0 2 5 NW NNW Variable Total 1 0 0 4 13 3 2 1 0 1 22 4 24 3 25 0 0 2 0 0 6 0 0 4 30 26 28 12 8 108 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 0 stability class:. 10 all stability classes: 5 Page 86 SITE: LICENSEE: Table D -LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC 8 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, October -December, 2008 Stability Period of Record: October -December2008 Class -Neutral -17lFt-26Ft Winds Measured at 175 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8 7 8 3 4 4 2 1 1 4 4 4 7 1 5 4 0 17 20 9 10 8 6 8 11 15 16 8 4 17 19 15 15 0 8-12 13-18 19-24 > 24 15 4 0 0 28 14 0 0 10 0 0 0 6 .0 0 0 8 0 0 0 2 .0 0 0 0 2 1 0 13 3 0 0 30 1 1 0 6 9 7 2 3 1 0 0 11 8 1 0 32 24 15 4 45 47 23 12 35 47 19 11 6 14 1 0 0 0 0 0 Total 44 69 27 19 20 12 13 28 48 44 16 28 99 147 132 40 0 Total 67 198 250 174 68 29 0 stability class: 51 all stability classes: 786 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 5 Page 87 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -8 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, October -December, 2008 Period of Record: October -December2008 Stability Class -Slightly Stable -l7lFt-26Ft Winds Measured at 175 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 9 12 8-12 13-18 19-24 > 24 Total N NNE NE ENE 9 4 1 15 19 10 8 5 4 1 1 7 11 13 E 3 3 16 ESE SE SSE 3 2 0 6 1 11 4 0 7 1 3 6 3 0 2 0 0 0 0 1 3 0 7 1 2 0 34 0 47 0 18 0 32 0 23 0 12 0 13 1 26 0 62 0 49 1 52 0 55 2 81 7 136 0 43 0 12 S 4 14 29 15 1 13 16 12 SSW SW WSW W WNW NW NNW Variable 6 22 18 4 16 30 4 3 4 14 34 17 10 4 45 59 14 9 4 0 8 18 3 0 5 0 7 0 0 7 1 0 0 0 0 Total 68 200 281. 101 34 11 *695 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 7 all stability classes: 5 Page 88 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -8 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, October -December, 2008 Stability Period of Record: October -December2008 Class -Moderately Stable -171Ft-26Ft Winds Measured at 175 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 0 NNE NE 3 2 ENE E 0 2 4 4 4 1 0 1 3 6 2 2 6 0 0 2 0 1 2 4 7 ESE SE SSE 2 1 0 0 S 1 1 0 0 0 0 0 0 0 1 5 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7 6 0 10 0 11 5 3 2 3 SSW SW WSW W WNW 1 1 6 11 1 14 6 8 0 10 0 11 0 23 0 21 0 19 0 51 0 25 0 13 2 9 2 29 19 3 10 11 NW NNW Variable Total 9 0 4 0 0 0 0 0 32 99 79 10 0 220 Hours of calm in this stability class: 0 stability class: Hours of missing Hours of missing wind measurements in this 0 stability measurements in all stability classes: 5 Page 89 SITE: LICENSEE: Table D -LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC 8 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, October -December, 2008 Period of Record: October -December2008 Stability Class -Extremely Stable -171Ft-26Ft Delta-T (F)Winds Measured at 175 Feet Wind Direction 1-3 N 6 NNE 2 NE 1 ENE 4 E 4 ESE 3 SE 7 SSE 1 S 4 SSW 4 SW 1 WSW 4 W 4 WNW 12 NW 5 NNW 4 Variable 0 Wind Speed (in mph)4-7 8-12 13-18 19-24 > 24 Total 8 1 3 2 4 0 2 5 5 4 11 5 14 31 20 8 0 1 0 0 0 0 0 0 2 3 2 2 3 2 17 6 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 3 4 6 8 3 9 8 12 11 14 12 20 60 31 13 0 Total 66 123 39 0 1 0 229 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 1 stability class: 0 all stability classes: 5 Page 90 SITE: LICENSEE: LIMERICK GENERATING STATION:-

UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Table D -9 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January -December, 2008 Limerick Tower 1 30 ft. Wind Speed and Direction January-December, 2008 l7lFt-26Ft Delta-T (F)Number of Observations

= 8476 Values are Percent Occurrence SPEED- ---------------------

CLASS N NNE NE ENE------ WIND DIRECTION CLASSES E ESE SE SSE S SSW........ -STABILITY CLASSES-----------

SW WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL EU MU C SU A N L SS N MS ES EU MU 1 SU-N 3 SS MS ES 4 7 EU MU SU N SS MS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.55 0.80 0.68 0.64 0.07 0.08 0.14 0.78 0.68 0.04 0.01 0.12 0.11 0.12 0.48 0.26 0.00 0.00 0.00 0.01 0.00 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.54 0.72 0.27 0.38 0.05 0.12 0.19 0.83 0.76 0.12 0.00 0.05 0.06 0.06 0.26 0.12 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.74 0.60 0.38 0.37 0.02 0.02 0.08 0.60 0.40 0.04 0.01 0.02 0.00 0.00 0.06 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.71 0.70 0.27 0.24 0.00 0.02 0.08 0.98 0.74 0.00 0.00 0.02 0.00 0.04 0.28 0.09 0.00 0.00 0.00 0.00 0.00 0.06 0.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.39 0.50 0.15 0.22 0.02 0.08 0.21 1.38 0.88 0.09 0.01 0.01 0.05 0.13 0.94 0.24 0.00 0.00 0.02 0.00 0.05 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0O00 0.00 0.00 0.00 0.22 0.27 0.27 0.15 0.05 0.04 0.11 0.68 0.2 8 0.08 0.00 0.04 0.07 0.06 0.22 0.19 0.01 0.00 0.02 0.01 0.00 0.07 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.25 0.40 0.12 0.21 0.01 0.02 0. 09 0.32 0.31 0.02 0.02 0.00 0.00 0.00 0.09 0.11 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.32 0.38 0.17 0.08 0.05 0.02 0.05 0.41 0.57 0.07 0.01 0.02 0.00 0.01 0.08 0.15 0.00 0.00 0.00 0.00 0.00 0.00 0.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.01 0.27 0.44 0.15 0.15 0.14 0.00 0.09 0.70 1.45 0.24 0.07 0.14 0.02 0.02 0.24 0.41 0.00 0.00 0.00 0.00 0.00 0.00 0.04 0.00 0.00 0. 00 0.00 0. 00 0.00 0.00 0.00 0.00 0.01 0.00 0.01 0.48 0.66 0.27 0.32 0.21 0.13 0.07 0.93 0.79 0.26 0.11 0.13 0.08 0.08 0.40 0.64 0.00 0.00 0.00 0.00 0.01 0.05 0.01 0.00'0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.46 0.81 0.53 0.42 0.22 0.15 0.11 0.92 0.37 0.14 0.04 0.05 0.04 0.08 0.09 0.13 0.01 0.01 0.00 0.00 0.00 0.01 0.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.04 0.54 1.25 0.64 0.48 0.37 0.18 0.24 0.93 0:64 0.04 0.00 0.01 0.00 0.01 0.09 0.07 0.00 0.60 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.06 0.11 0.53 1.42 1.10 0.63 0.21 0.21 0.26 1.17 1.01 0.09 0.01 0.14 0.11 0.11 0.52 0.35 0.00 0.00 0.04 0.02 0.02 0.22 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.02 0.05 0.80 1.97 1.70 1.62 0.28 0.22 0.37 1.63 1.84 0.19 0.00 0.22 0.19 0.27 1.40 0.29 0.00 0.00 0.08 0.13 0.11 0.40 0.11 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.05 0.04 0.73 1.49 1.31 1.52 0.26 0.29 0.37 2.55 1.75 0.17 0.05 0.22 0.40 0.59 3 .32 0.52 0.00 0.00 0.08 0.22 0.35 1.60 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.50 0.79 0.84 1.12 0.09 0.12 0.11 1.07 0.57 0.05 0.01 0.22 0.15 0.22 1.14 0.14 0.01 0.00 0.01 0.06 0.08 0.38 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.13 0.28 0.44 8.05 13.19 8.85 8.55 2.06 1.72 2.56 15.88 13.04 1.63 0.35 1.43 1.27 1.81 9.64 3.86 0.05 0.01 0.26 0.46 0.63 2-90 0.44 0.00 0.00 0.00 0.13 2.06 1.43 0.26 0.00 0.28 1.72 1.27 0.46 0.00 0.44 2.56 1.81 0.63 0.00 8.05 15.88 9.64 2.90 0.00 13.19 13 .04 3.86 0.44 0.00 8.85 1.63 0.05 0.00 0.00 8.55 0.35 0.01 0.00 0.00 39.49 37.25 18.06 4.68 EU NU 8 SU-N 1 SS 2 MS ES EU 1 MU 3 SU-N 1 SS 8 MS ES Page 91 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -9 Wind Speed by Direction Measured at 30 Feet for Various Stability Qlasses for the Limerick Generating Station, January -December, 2008 Limerick Tower 1 30 ft. Wind Speed and Direction January-December, 2008 171Ft-26Ft Delta-T (F)SPEED CLASS EU 1 MU 9 SU-N 2 SS 4 MS ES EU G MU T SU N 2 SS 4 MS ES N NNE NE ENE E WIND DIRECTION CLASSES SE SSE S SSW--STABILITY CLASSES EU MU SU N SS MS ES TOTAL ESE SW WSW W WNW NW NNW TOTAL 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00.0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00-0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0. 00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.08 0.35 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.09 0.38 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.02 0.00 0.09 0.01 0.38 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.50 0.02 TOT 5.64 4.53 3.52 4.29 5.51 2.86 2.02 2.44 4.62 5.66 4.70 5.59 8.42 13.98 18.46 7.75 100.00 3.88 3.76 5.53 36.86 30.52 10.52 8.92 100.00 Wind Direction by Stability N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.19 0.20 0.31 1.83 1,75 0.72 0.65 0.09 0.19 0.26 i.63 1.59 0.39 0.38 0.05 0.04 0.09 1.40 1.14 0.41 0.38 0.02 0.02 0.14 2.03 1.57 0.27 0.24 0.06 0.14 0.40 2.81 1.62 0.25 0.24 0.11 0.12 0.17 1.20 0.74 0.37 0.15 0.01 0.02 0.12 0.66 0.81 0.15 0.24 0.07 0.02 0.07 0..81 1.13 0.24 0.09 0.29 0.05 0.13 1.20 2.34 0.39 0.22 0.35 0.21 0.18 1.86 2.10 0.53 0.42 0.27 0.21 0.22 1.49 1.34 0.68 0.47 0.38 0.24 0.28 1.57 1.97 0.67 0.48 0.40 0.40 0.50 2.45 2.84 1.19 0.64 0.65 0.57 0.80 4.25 4.21 1.89 1.62 0.59 0.98 1.44 8.57 3.85 1.47 1.57 0.34 0.35 0.42 3.09 1.51 0.90 1.13 3.88 3.76 5.53 36.86 30.52 10.52 8.92-STABILITY CLASSES-Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable-WIND SPEED CLASSES-Wind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 2.73 1.81 1.09 0.02 0.00 0.00 0.00 1.93 2.05 0.54 0.00 0.00 0.00 0.00 2.11 1.18 0.22 0.00 0.00 0.00 0.00 1.93 1.83 0.44 0.09 0.00 0.00 0.00 1.29 2.69 1.37 0.17 0.00 0.00 0.00 0.92 1.24 0.59 0.11 0.00 0.00 0.00 1.00 0.80 0.21 0.00 0.00 0.00 0.00 0.96 1.18 0.27 0.04 0.00 0.00 0.00 1.06 2.69 0.84 0.04 0.00 0.00 0.00 1.76 2.50 1.33 0.07 0.00 0.00 0.00 2.29 1.95 0.41 0.05 0.00 0.00 0.00 3.01 2.38 0.19 0.01 0.00 0.00 0.00 3.85 2.97 1.23 0.37 0.01 0.00 0.00 6.22 4.53 2.38 0.83 0.02 0.00 0.00 5.16 5.43 5.05 2.36 0.45 0.02 0.00 3.28 2.02 1.90 0.54 0.01 0.00 0.00 39.49 37.25 18.06 4.68 0.50 0.02 C 3.6 7.6 12.6 18.6 A L M< 3.5 mph-7.5 mph-12.5 mph-18.5 mph-24.5 mph> 24.5 mph Page 92 SITE: LIMERICK GENERATING STATION -UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC Table D -10 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January -December, 2008 Limerick Tower 1 175 ft. Wind Speed and Direction January-December,.

2008 171Ft-26Ft Delta-T (F)Number of Observations

= 8652 Values are Percent Occurrence SPEED CLASS EU MU C SU A N L SS M MS ES EU MU 1 SU-N 3 SS MS ES EU MU 4 SU-,.N 7 SS MS ES EU MU 8 SU-N 1 SS 2 MS ES EU 1 MU 3 SU-N 1 SS 8 MS ES N NNE NE ENE E ESE 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.28 0.31 0.17 0.18 0.02 0.05 0.13 0.55 0.53 0.22 0.29 0.14 0.12 0.09 0.57 0.71 0.12 0.08 0.02 0.02 0.02 0.21 0.20 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.36 0.17 0.13 0.12 0.01 0.08 0.05 0.62 0.51 0.15 0.15 0.06 0.01 0.09 0.52 0.58 0.20 0.02 0.00 0.03 0.01 0.20 0.17 0.01 0.00 0.00, 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.29 0.35 0.13 0.08 0.02 0.02 0.05 0.65 0.32 0.14 0.16 0.01 0.00 0.03 0.38 0.34 0.08 0.01 0.00 0.00 0.00 0.05 0.08 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.24 0.23 0.15 0.16 0.01 0.01 0.07 0.80 0.76 0.14 0.13 0.00 0.01 0.10 0.82 0.57 0.00 0.01 0.05 0.00 0.01 0.21 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.20 0.17 0.08 0.14 0.01 0.01 0.13 0.73 0.45 0.16 0.12 0.01 0.10 0.12 1.04 0.77 0.09 0.00 0.02 0.01 0.09 0.46 0.20 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.09 0.22 0.10 0.14 0.01.0.01 0.08 0.38 0.23 0.12 0.03 0.03 0.06 0.07 0.40 0.24 0.01 0.00 0.01 0.01 0.01 0.08 0.13 0.01 0.00 WIND SE 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.13 0.08 0.15 0.01 0.01 0.06 0.25 0.36 0.12 0.07 0.00 0.03 0.03 0.28 0.18 0.01 0.01 0.00 0.00 0.00 0.06 0.13 0.01 0.00 DIRECTION CLA SSE S ASSES ----------------------------------

STABILITY CLASSES-----------

SSW SW WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.08 0.08 0.10 0.05 0.01 0.01 0.01 0.39 0.39 0.16 0.12 0.06 0.01 0.03 0.31 0.42 0.06 0.06 0.01 0.00 0.01 0.07 0.15 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.02 0.09 0.10 0.05 0.15 0.09 0.01 0.08 0.45 0.59 0.29 0.16 0.16 0.02 0:01 0.74 1.43 0.20 0.10 0.09 0.02 0.02 0.29.0.60 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.16 0.12 0.09 0.15 0.05 0.08 0.02 0.51 0.54 0.30 0.30 0.23 0.16'0.07 0.64 0.58 0.34 0.23 0.09 0.03 0.07 0.31 0.49 0.06 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.17 0.17 0.09 0.17 0.05 0.08 0.12 0.64 0.73 0.44 0.53 0.21 0 05 0.09 0.69 0.74 0.32 0.20 0.01 0.02 0.03 0.18 0.13 0.08 0.00 0.00 0.00 0.00 0.00 0.00'0.00 0.00 0.00 0.00 0.01 0.24 0.22 0.09 0.23 0.05 0.20 0.13 0.52 0.74 0.57 0.44 0.24 0.14 0.17 0.76 0.81 0.23 0.21 0.14 0.02 0.06 0.28 0.13 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.05 0.25 0.22 0.17 0.20 0.03 0.14 0.17 0.75 0.81 0.54 0.60 0.25 0.12 0.23 1.01 1.18 0.29 0.05 0.15 0.10 0.12 0.86 0.47 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.00 0.05 0.25 0.21 0.16 0.38 0.20 0.14 0.17 1.03 1.91 1.29 1.29 0.25 0.31 0.29 1.76 2.21 0.77 0.69 0.14 0.23 0.27 1.87 0.47 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.02 0.31 0.42 0.21 0.15 0.07 0.07 0.13 0.80 0.65 0.77 0.72 0.12 0.20 0.29.1.69 1.12 0.35 0.27 0.07 0.10 0.36 1.62 0.25 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.18 0.23 0.25 0.15 0.03 0.09 0.06 0.46 0.39 0.25 0.42 0.09 0.09 0.03 0.77 0.37.0.07 0.07 0.12 0.06 0.10 0.64 0.07 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.08 0.22 3.35 3.35 2.07 2.60 0.68 1.02 1.44 9.54 9.92 5.66 5.52 1.87 1.43-1.77 12.38 12.24 3: 13 2.01 0.92 0.68 1.19 7.37 3.72 0.24 0.03 0.00 0.05 0.68 1.87 0.92 0.00 0.08 1.02 1.43 0.68 0.00 0.22 1.44 1.77 1.19 0.00 3.35 9.54 12.38 7.37 0.00 3.35 9.92 12.24 3.72 0.00 2.07 5.66 3.13 0.24 0.00 2.60 5.52 2.01 0.03 0.00 11.72 33.78 34.84 14.17 Page 93 SITE: LICENSEE: LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Table D -10 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January -December, 2008 Limerick Tower 1 175 ft. Wind Speed and Direction January-December, 2008 l7lFt-26Ft Delta-T (F)SPEED CLASS N NNE NE- ENE E ESE WIND DIRECTION CLASSES---------

STABILITY CLASSES-----------

EU MU SU " N SS MS ES TOTAL SE SSE SSW -SW WSW W WNW NW NNW TOTAL EU 1 MU 9 SU-N 2 SS 4 MS ES EU G MU T SU N 2 SS 4 MS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00.0.00 0.00 0.00 0.00 0.00 0.00 0.00 .0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.02 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.07 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.01 0.00 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.00 0.00 0.00 0.00 0.00 0.01 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.03 0.14 0.22 0.00 0.01 0.00 0.00 0.00 0.02 0.01 0.00 0.00 0.00 0.01 0.02 0.00 0.07 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.00 0.00 0.02 0.01 0.01 0.01 0.07 0.00 0.00 0.01 0.00 0.00 0.01 0.02 0.00 0.00 0.07 0.10 0.14 0.46 0.14 0.00 0.00 0.05 0.01 0.03 0.18 0.02 0.00 0.00 0.07 0.15 0.16 0.79 0.08 0.00 0.00 0.00 0.06 0.07 0.37 0.13 0.00 0.00 0.02 0.09 0.12 0.53 0.02 0.00 0.00 0:00 0.01 0.07 0.21 0.00 0.00 0.00 0.00 0.00 0.02 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.22 0.38 0.52 2.20 0.81 0.00'0.01 0.06 0.08 0.17 0.80 0.24 0.00 0.00 0.22 0.06 0.38 0.08 0.52 0.17 2.20 0.80 0.81 0.24 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 4.14 1.35 TOT 5.06 4.28 3.27- 4.58 5.20 2.57 2.15 2.69 5.91 6.09 6.10 6.82 10.00 18.27 11.86 5.15 100.00 3.80 3.68 5.32 35.63 30.28 11.11 10.18 100.00 Wind Direction by Stability N NNE NE ENE , E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.18 0.18 0.27 1.61 1.75 0.52 0.55 0.07 0.13 0.15 1.70 1.46 0.49 0.29 0.03 0.02 0.09 1.42 1.10 0.35 0.25 0.06 0.02 0.20 2.07 1.64 0.29 0.30 0.05 0.13 0.35 2.50 1.60 0.34 0.25 0.08 0.10 0.16 0.98 0.82 0.24 0.17 0.01 0.05., 0.09 0.74 0.81 0.22 0.23 0.08 0.02 0.06 0.86 1.11 0.34 0.23 0.36 0.06 0.14 1.58 2.82 0.53 0.42 0.38 0.28 0.21 1.78 1.95 0.79 0.71 0.27 0.17 0.27 1.69 1.87 0.94 0.90 0.46 0.37 0.38 1.83'1.99 0.91 0.88 0.55 0.50 0.74 3.51 2.84 1.01 0.84 0.68 0.89 1.01 6.07 5.00 2.24 2.38 0.29 0.50 0.98 5.15 2.46 1.34 1.13 0.24 0.25" 0.23 2.15 1.06 0.58 0.64 3.80 3.68 5.32 35.63 30.28 11.11 10.18-STABILITY CLASSES-Extremely Unstable Moderately.Unstable

Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable-WIND SPEED CLASSES-Wind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 0.97 1.79 1.81 0.49 0.00 0.00 0.00.0.77 1.57 1.48 0.43 0.02 0.00 0.00 0.86 1.36 0.86 0.13 0.07 0.00 0.00 0.80 1.92 1.51 0.32 0.02 0.00 0.00 0.59 1.61 2.14 0.79 0.08 0.00 0.00 0.57 0.87 0.82 0.25 0.06 0.00 0.-00 0.50 0.88 0.55 0.20 0.02 0.00 0.00 0.31 1.10 0.95 0.27 0o05 0.02 0.00 0.43 1.68 2.67 1.03 0.10-0.00 0.00 0.53 1.80 2.24 1.06 0.42 0.03 0.00 0.62 2.58 2.30 0.46 0.10 0.03 0.00 0.80 2.64 2.57 0.65 0.13 0.05 0.00 0.91 3.05 3.12 1.70 0.91 0.30 0.00 1.07 6.03 6.29 3.01 1.25 0.62 0.00 1.14 3.20 4.02 2.42 0.79 0.29 0.00 0.84 1.71 1.50 0.98 0.12 0.00 0.00 11.72 33.78 34.84 14.17 4.14 1.35 C 3.6 7.6 12.6 18.6 A L M< 3.5 mph-7.5 mph-12.5 mph-18.5 mph-24.5 mph> 24.5 mph Page 94 SITE: LICENSEE: Table D- 11 LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Annual x/Q, x/Q depleted and D/Q values for the North Stack, Limerick Generating Station, 2008 Limerick Generating Station x/Q, x/Q depleted and D/Q values North Stack -Flow = 251200 cfm Stack ID Location Direction Range (m)X/Q (s/mA3)Undepleted No Decay X/Q (s/mA2)Depleted 8.05d Decay D/Q (1/mA2)N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N Site Boundary Inhalation Vegetatioh Meat Cow RR-Inf-Lck-NG Site Boundary Inhalation Vegetation Meat Site Boundary Meat Inhalation Vegetation Site Boundary Inhalation Vegetation Meat Site Boundary Inhalation Vegetation Meat Site Boundary Inhalation RR-Inf-Lck-NG Cow Goat Vegetation Meat Site Boundary Inhalation Vegetation Meat Site Boundary Inhalation Vegetation Meat Cow RR-Inf-Lck-NG N N N N N NNE NNE NNE NNE NNE NE NE NE NE ENE ENE ENE ENE E E E E ESE ESE ESE ESE ESE ESE ESE SE SE SE SE SSE SSE SSE SSE SSE S 884 965 2574 3414 7562 682 793 805 805 1585 793 1097 1287 2414 793 965 2896 3871 762 965 1770 1890 762 805 884 1770 1770 1931 4511 762 1609 1770 7241 1006 1609 1931 7224 7562 300 2.OOE-07 1.78E-07 6.37E-08 5.52E-08 3.40E-08 3.35E-07 2.71 E-07 2.65E-07 2.65E-07 1.09E-07 1.67E-07 1.08E-07 8.73E-08 5.12E-08 1.71 E-07 1.32E-07 5.62E-08 5.47E-08 3.56E-07 2.58E-07 1.23E-07 1.16E-07 6.23E-07 5.78E-07 5.07E-07 2.1OE-07 2.1OE-07 1.93E-07 1.26E-07 1.13E-06 4.08E-07 3.64E-07 1.11E-07 2.36E-07 1.29E-07 1.06E-07 4.87E-08 4.73E-08 8.74E-07 1.82E-07 1.61 E-07 5.69E-08 5.OOE-08 3.13E-08 3.09E-07 2.48E-07 2.43E-07 2.43E-07 9.67E-08 1.53E-07 9.71 E-08 7.84E-08 4.62E-08 1.57E-07 1.20E-07 5.18E-08 5.11 E-08 3.26E-07 2.34E-07 1.09E-07 1.03E-07 5.71 E-07 5.28E-07 4.61 E-07 1.86E-07 1.86E-07 1.72E'07 1.16E-07 1.04E-06 3.61 E-07 3.22E-07 9.91 E-08 2.13E-07 1 .14E-07 9.43E-08 4.48E-08 4.35E-08 8.37E-07 1.67E-09 1.47E-09 3.69E-1 0 2.47E-1 0 7.04E-1 1 3.30E-09 2.67E-09 2.61 E-09 2.61 E-09 1.06E-09 1.57E-09 1.05E-09 8.75E-10 3.97E-10 1.54E-09 1.22E-09 3.35E-10 2.34E-10 3.75E-09 2.68E-09 1.19E-09 1.08E-09 6.70E-09 6.18E-09 5.38E-09 2.02E-09 2.02E-09 1.78E-09 5.11E-10 1.47E-08 4.81 E-09 ,4.16E-09 4.54E-10 2.84E-09 1.49E-09 1.15E-09 1.58E-1 0 1.46E-10 7.22E-09 Page 95 SITE: LICENSEE: Table D -11 LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Annual x/Q, x/Q depleted and D/Q values for the North Stack, Limerick Generating Station, 2008 Limerick Generating Station x/Q, x/Q depleted and D/Q values North Stack -Flow = 251200 cfm X/Q (s/mA3)Stack ID X/Q (s/mA2)Depleted 8.05d Decay Location Direction Range (m)Undepleted No Decay D/Q (limA2)4 4 4 -4 Site Boundary Inhalation Vegetation Meat Cow RR-Inf-Lck-NG Site Boundary Meat Inhalation Vegetation Cow RR-Inf-Lck-NG Site Boundary Inhalation Vegetation Meat Cow RR-Inf-Lck-NG RR-Inf-Lck-NG Site Boundary Inhalation Vegetation Meat Cow RR-Inf-Lck-NG Site Boundary Inhalation Vegetation Meat RR-Inf-Lck-NG Site Boundary Inhalation Vegetation RR-Inf-Lck-NG Site Boundary Inhalation Vegetation Meat Site Boundary Inhalation Vegetation Meat S S S S S SSW SSW SSW SSW SSW SSW SW SW SW SW SW SW WSW WSW WSW wSW WSW WSW WSW W W W W W WNW WNW WNW WNW NW NW NW NW NW NNW NNW NNW NNW 762 1287 1931 3018 3701 225 762 1433 1609 2253 2896 225 884 965 965 2835 4827 345 450 854 1287 1287 2134 4505 225 854 965 3540 4084 345 793 1126 1126 450 762 2092 2574 6660 884 1448 1931 6325 2.OOE-07 1.OOE-07 6.62E-08 5.36E-08 5.06E-08 1.36E-06 1.80E-07 7.85E-08 6.93E-08 5.41 E-08 4.93E-08 8.32E-07 8.80E-08 7.80E-08 7.80E-08 3.30E-08 3.22E-08 5.94E-07 3.72E-07 1.45E-07 8.36E-08 8.36E-08 5.32E-08 4.47E-08 2.19E-06 2.53E-07 2.14E-07 6.21 E-08 5.69E-08 4.56E-07 1.24E-07 7.67E-08 7.67E-08 1.76E-07 7.97E-08 2.52E-08 2.30E-08 1.70E-08 8.91 E-08 4.65E-08 3.53E-08 2.24E-08 1.83E-07 8.95E-08 5.91 E-08 4.89E-08 4.67E-08 1.31 E-06 1.65E-07 7.OOE-08 6.17E-08 4.85E-08 4.49E-08 8.03E-07 7.99E-08 7.05E-08 7.05E-08 3.03E-08 3.03E-08 5.66E-07 3.51 E-07 1.32E-07 7.45E-08 7.45E-08 4.77E-08 4.17E-08 2.11 E-06 2.30E-07 1.94E-07 5.61 E-08 5.16E-08 4.34E-07 1 .14E-07 6.90E-08 6.90E-08 1.66E-07 7.32E-08 2.25E-08 2.08E-08 1.59E-08 8.11 E-08 4.13E-08 3.14E-08 2.09E-08 1.96E-0S 1.OOE-09 6.17E-1C 3.47E-1C 2.65E-1 C 8.56E-0S 1.52E-0S 7.07E-1C 6.19E-1C 4.07E-1 C 2.96E-1C 4.15 E-OS 6.21 E-1 C 5.59E-1C 5.59E-1C 1.86E-1C 9.56E-1 1 4.40E-0S 2.98E-09 1.17E-09 7.16E-1C 7.16E-1C 4.1OE-1C 1.60E-1C 1.75E-08 2.55E-09 2.14E-09 3.93E-10 3.21 E-10 4.22E-09 1.32E-09 8.17E-10 8.17E-10 1.30E-09 6.20E- 10 1.80E-10 1.38E-10 3.63E-1 1 7.24E-1 0 3.83E-10 2.60E-10 4.73E-1 1 Page 96 SITE: LICENSEE: Table D -12 LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Annual x/Q, x/Q depleted and D/Q values for the South Stack, Limerick Generating Station, 2008 Limerick Generating Station x/Q, x/Q depleted and D/Q values South Stack -Flow = 177200 cfm Stack ID Location Direction Range (m)X/Q (s/mA3)Undepleted No Decay X/Q (s/mA2)Depleted 8.05d Decay D/Q (1/mA2)+m W I f Site Boundary Inhalation Vegetation Meat Cow RR-Inf-Lck-NG Site Boundary Inhalation Vegetation Meat Site Boundary Meat Inhalation.

Vegetation Site Boundary Inhalation Vegetation Meat Site Boundary Inhalation Vegetation Meat Site Boundary Inhalation RR-Inf-Lck-NG Cow Goat Vegetation Meat Site Boundary Inhalation Vegetation Meat Site Boundary Inhalation Vegetation Meat Cow N N N N N NNE NNE NNE NNE NNE NE NE NE NE ENE ENE ENE ENE E E E E ESE ESE ESE ESE ESE ESE ESE SE SE SE SE SSE SSE SSE SSE SSE 884 965.2574 3414 7562.682 793 805 805 1585 793 1097 1287 2414 793 965 2896 3871 762 965 1770 1890 762 805 884 1770 1770 1931 4511 762 1609 1770 7241 1006 1609 1931 7224 7562 6.80E-08 6.1 OE-08 3.54E-08 3.69E-08 2.93E-08 1.1OE-07 9.03E-08 8.86E-08 8.86E-08 4.32E-08 4.37E-08 3.1 OE-08 2.70E-08 2.65E-08 4.61 E-08 3.81 E-08 3.59E-08 4.11 E-08 1.15E-07 8.65E-08 5.39E-08 5.36E-08 1.92E-07 1.79E-07 1.60E-07 8.92E-08 8.92E-08 8.81 E-08 9.80E-08 4.09E-07 1.84E-07 1.73E-07 9.56E-08 8.78E-08 5.83E-08 5.42E-08 4.28E-08 4.19E-08 6.23E-08 5.56E-08 3.31 E-08 3.51 E-08 2.80E-08 1.02E-07 8.33E-08 8.17E-08 8.17E-08 3.94E-08 4.07E-08 2.86E-08 2.49E-08 2.51 E-08 4.29E-08 3.53E-08 3.46E-08 3.98E-08 1.06E-07 7.90E-08 4.96E-08 4.94E-08 1.77E-07 1.65E-07 1.46E-07 8.18E-08 8.18E-08 8.13E-08 9.39E-08 3.76E-07 1.67E-07 1.58E-07 8.95E-08 8.OOE-08 5.33E-08 4.99E-08 4.06E-08 3.97E-08 8.23E-10 7.45E-10 2.48E-1 0 1.76E-10 5.51 E-1 1.1.58E-09 1.33E-09 1.31 E-09 1.31 E-09 6.78E-1 0 8.76E-1 0 6.61 E-10 5.86E-1 0 3.1OE-10 9.16E-10 7.79E-1 0 2.81 E-10 2.04E-1 0 1.76E-09 1.36E-09 7.75E-1 0 7.20E-10 2.95E-09 2.77E-09 2.48E-09 1.25E-09 1.25E-09 1.13E-09 4.04E-1 0 6.69E-09 2.88E-09 2.57E-09 3.89E-1 0 1.41 E-09 9.37E-1 0 7.68E-10 1.39E-10 1.29E-10 Page 97 SITE: LICENSEE: Table D -12 LIMERICK GENERATING STATION -UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Annual x/Q, x/Q depleted and D/Q values for the South Stack, Limerick Generating Station, 2008 Limerick Generating Station x/Q, x/Q depleted and D/Q values South Stack -Flow = 177200 cfm X/Q (s/mA3)Stack ID Location Direction Range (m) Undepleted I No Decav X/Q (s/mA2)Depleted 8.05d Decav DIQ (IimA2)+RR-Inf-Lck-NG Site Boundary Inhalation Vegetation Meat Cow RR-Inf-Lck-NG Site Boundary Meat Inhalation Vegetation Cow RR-Inf-Lck-NG Site Boundary Inhalation Vegetation Meat Cow RR-Inf-Lck-NG RR-Inf-Lck-NG Site Boundary Inhalation Vegetation Meat Cow RR-Inf-Lck-NG Site Boundary Inhalation Vegetation Meat RR-Inf-Lck-NG site Boundary Site Boundary Inhalation Vegetation Inhalation Vegetation Meat RR-Inf-Lck-NG Site Boundary Inhalation Vegetation Meat S S S S S S SSW SSW SSW SSW SSW SSW SW SW SW SW SW SW WSW WSW WSW WSW WSW WSW WSW W W W W W WNW WNW NNW WNW WNW NNW NNW NNW NW NW NW NW NW 300 762 1287 1931 3018 3701 225 762 1433 1609 2253 2896 225 884 965 965 2835 4827 345 450 854 1287 1287 2134 4505 225 854 965 3540 4084 345 793 884 1126 1126 1448 1931 6325 450 762 2092 2574 6660 2.98E-07 7.22E-08 4.07E-08 3.38E-08 3.68E-08 3.83E-08 4.19E-07 5.86E-08 2.95E-08 2.78E-08 2.84E-08 3.15E-08 1.97E-07 2.22E-08 1.99E-08 1.99E-08 1.98E-08 2.57E-08 1.63E-07 1.02E-07 4.11 E-08 2.56E-08 2.56E-08 2.50E-08 3.53E-08 7.61 E-07 9.23E-08 7.95E-08 4.51 E-08 4.36E-08 1.47E-07 4.35E-08 2.96E-08 2.91 E-08 2.91 E-08 1.70E-08 1.57E-08 1.90E-08 4.83E-08 2.35E-08 1.17E-08 1.29E-08 1.45E-08 2.85E-07 6.66E-08 3.70E-08 3.12E-08 3.50E-08 3.66E-08 4.04E-07 5.39E-08 2.67E-08 2.53E-08 2.66E-08 2.99E-08 1.90E-07 2.02E-08 1.81 E-08 1.81 E-08 1.90E-08 2.49E-08 1.56E-07 9.65E-08 3.75E-08 2.31 E-08 2.31 E-08 2.34E-08 3.41 E-08 7.35E-07 8.44E-08 7.22E-08 4.26E-08 4.12E-08 1.40E-07 4.01 E-08 2.70E-08 2.65E-08 2.65E-08 1.53E-08 1.44E-08 1.83E-08 4.55E-08 2.17E-08 1.09E-08 1.22E-08 1.40E-08 2.94E-O0 9.90E-1 C 6.27E-1C 4.51 E-1 C 2.82E-1C 2.23E-1C 3.1 0E-O0 7.OOE-1 C 4.43E-1C 4.08E-1C 2.97E-1C 2.29E- 10 1.34E-09 2.81 E-10 2.67E-1 0 2.67E-1 0 1.47E-10 8.19E-1 1 1.52E-09 1.06E-09 4.90E-10 3.89E-1 0 3.89E-10 2.88E-1 0 1.34E-10 6.46E-09 1.17E-09 1.03E-09 3.18E-10 2.67E-1 0 1.81 E-09 7.11E-10 3.50E-10 4.96E-10 4.96E-10 2.28E-1 0 1.70E-10 3.84E-1 1 5.20E-10 2.83E-10 1.27E-10 1.02 E-10 3.09E-1 1 Page 98

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