Text

2006 Annual Radioactive Effluent Release Report
	ML071210611
Person / Time
Site:	Limerick
Issue date:	04/27/2007
From:	Mudrick C; Exelon Generation Co, Exelon Nuclear
To:	; Document Control Desk, NRC/NRR/ADRO
References
	Download: ML071210611 (106)
	v • d • e

Exekln&

Exelon Nuclear www.exeloncoTp.com Limerick Generating Station Nuclear P.O. Box 2300 Pottstown, PA 19464 T.S. 6.9.1.8 April 27, 2007 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 Limerick Generating Station, Unit 1 and 2 Facility Operating License Nos. NPF-39 and NPF-85 NRC Docket Nos. 50-352 and 50-353

Subject:

2006 Annual Radioactive Effluent Release Report In accordance with Section 6.9.1.8 of Limerick Generating Station (LGS) Technical Specifications and Section 6.2 of the Offsite Dose Calculation Manual, attached is the 2006 Annual Radioactive Effluent Release Report No. 32 for LGS. There have been no revisions to the Limerick Offsite Dose Calculation Manual since the last report.

There are no commitments contained in this letter.

If you have any questions or require additional information, please do not hesitate to contact us.

Sincerely, Christopher H. Mudrick Vice President-LGS Exelon Generation Company, LLC Attachments: 2006 Annual Radioactive Effluent Release Report No. 32 for LGS cc:

S. Collins, Administrator, Region I, USNRC (w/Attachment)

'S. Hansell, LGS USNRC Senior Resident Inspector (w/Attachment)

T. Moslak, Inspector Region I, USNRC (w/Atlachment)

USNRC Document Desk, Washington, DC (w/Attachment)

E. Thorton-Jones-US EPA, Office of Radiation and Indoor Air, Radiation Protection Division, Center of Waste Management, 1200 Pennsylvania Ave. MC 6608J, Washington, D.C.20460 (w/Attachment)

bcc:

P. Cowan - KSA 3P (w/o Attachment)

R. DeGregorio - KSA-3N (w/o Attachment)

C. Mudrick - GML 5-1 (w/o Attachment)

E. Callan-GML 5-1 (w/o Attachment)

D. Helker - KSA 3P (w/o Attachment)

D. Dicello - GML 1-1 (w/Attachment)

R. Kreider - SSB 2-4 (w/Attachment)

J. Toro - SMB 1-2 (w/Attachment)

D. Wahl - SSB 2-3 (w/Attachment)

S. Mitten - SSB 2-2 (w/Attachment)

D. Eisenhut - NSRB (w/Attachment)

D. Ney - PADEP BRP (w/Attachment)

S. Focht - ANI (w/Attachment)

ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT NO. 32 January 1, 2006 Through December 31, 2006 EXELON GENERATION COMPANY, LLC LIMERICK GENERATING STATION UNITS NO. I 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)

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EXELON GENERATION COMPANY, LLC TABLE OF CONTENTS SECTION PAGE

1. Introduction 1

2. Supplemental Information 1

A Regulatory Limits 1

B Maximum Permissible Concentrations 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 5

H Compliance to 40 CFR Part 190 Limits 5

3.

Appendix A - Effluent and Waste Disposal Summary 7

4.

Appendix B - Solid Waste and Irradiated Fuel Shipments 21

5. Appendix C - Radiological Impact to Man 25

6. Appendix D - Meteorological Data 29

7. Appendix E - Corrections to Previous Submittals 97 Page i

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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, 2006 through December 31, 2006. 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.

All vendor results were received and included in the report calculations. Therefore the 2006 report is complete.

2.

Supplemental Information A. Regulatory Limits Limit Units Receptor ODCM and 10 CFR 50, Appendix I Design Objective Limits

1. Noble Gases:

a.

<500 mrem/Yr

<3000 mrem/Yr Total Body Skin ODCM Control 3.2.2.1.a

b.

<10

< 20

c.

< 20

< 40

d.

<10

< 30 mRad mRad mRad mRad mrem mrem Air Gamma Air Beta Air Gamma Air Beta Total Body (Gamma)

Skin (Beta)

Quarterly air dose limits ODCM Control 3.2.2.2.a Yearly air dose limits ODCM Control 3.2.2.2.b 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

c.

<30

3. Liquid Effluents mrem mrem Any Organ Any Organ

a.

Concentration 10 CFR 20, Appendix B, Table II Col. 2 (pre 1994)

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

S 10

c.

<6

< 20

4. 40CFR 190

<25

< 75 mrem mrem mrem mrem mrem mrem Total Body Any Organ Total Body Any Organ Total Body Thyroid Page 1

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EXELON GENERATION COMPANY, LLC B. Maximum Permissible Concentrations:

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 Maximum Permissible Concentrations (MPC) specified in 10 CFR 20, Appendix B, Table II, Column 2 (pre 1994) 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 4Ci/ml.

C. Average Energy (E:

The Limerick ODCM limits the 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. Therefore, the average beta and gamma energies (E) 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," 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 are 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 was 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. When no isotopic activity was identified in the grab noble gas samples, 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 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 at least weekly to determine the total activity released from the plant based on the highest vent flow rates recorded for the sampling period.

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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 Samoles 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 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 1E-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, 1-131, Cs-134, 1E-11 uCi/cc Cs-137,Ce-141, Ce-144)

Noble Gas (Kr-87, Kr-88, Xe-1 33, Xe-1 33m, 1E-04 uCi/cc Xe-135, Xe-135m, Xe-138)

H-3 1E-06 uCi/cc Liquid:

Principal Gamma Emitters (Mn-54, Fe-59, Co-58, Co-60, Zn-65, Cs-134, Cs-137, Ce-141, 5E-07 uCi/ml Ce-1 44) 1-131 1 E-06 uCi/mI Entrained Gases (Kr-87, Kr-88, Xe-1 33, 1E-05 uCi/mI Xe-133m, Xe-135, Xe-1 35m, Xe-1 38)

H-3 1E-05 uCi/ml Gross Alpha 1 E-07 uCi/ml Sr-89, Sr-90 5E-08 uCi/ml 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.

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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 5.OOE+01 3.50E+01 4.80E+01 4.50E+01 Total time period for batch releases (min) 3.73E+03 2.85E+03 3.72E+03 3.49E+03 Maximum time period for batch release (min) 9.93E+01 2.49E+02 9.1OE+01 1.08E+02 Average time period for batch release (min) 7.46E+01 8.16E+01 7.76E+01 7.76E+01 Minimum time period for batch release (min) 5.47E+01 6.37E+01 4.72E+01 4.63E+O1 Average stream flow (Schuylkill River) during periods of release of effluents into a flowing stream (gpm) 8.79E+05 1.35E+06 1.29E+06 1.26E+O Gaseous Oil Incineration Qtr 1 Qtr 2 Qtr 3 Qtr 4 Number of Batch Releases O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 Total time period for batch releases (min)

O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 Maximum time period for batch release (min)

O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 Average time period for batch release (min)

O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 Minimum time period for batch release (min)

O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 Other Batch Releases Qtr 1 Qtr 2 Qtr 3 Qtr 4 Number of Batch Releases 2.OOE+00 1.OOE+00 O.OOE+00 1.OOE+00 Total time period for batch releases (min) 1.1 5E+04 9.98E+03 O.OOE+00 1.02E+04 Maximum time period for batch release (min) 1.44E+03 9.98E+03 O.OOE+00 1.02E+04 Average time period for batch release (min) 5.73E+03 9.98E+03 O.OOE+00 1.02E+04 Minimum time period for batch release (min) 1.OOE+04 9.98E+03 O.OOE+00 1.02E+04 F. Abnormal Releases:

1. Liquid Qtr 1 Qtr 2 Qtr 3 Qtr 4 Number of Releases 1.OOE+00 2.OOE+00 O.OOE+00 O.OOE+00 Total Activity Released (Ci) 1.65E-05 1.83E-03 O.OOE+0 O.OOE+00

2. Gaseous Number of Releases O.OOE+00 j0.OOE+000.OOE+O( O.00E+O0 Total Activity Released (Ci)

O.OOE+00 0.00E+000.00E+0(W 0.00E+OO Page 4

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EXELON GENERATION COMPANY, LLC G. Revisions to the ODCM There were no revisions made to the station's ODCM in 2006.

H. 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.

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Appendix A Effluent and Waste Disposal Summary Page 7

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EXELON GENERATION COMPANY, LLC LIST OF TABLES PAGE Table A - 1 Gaseous Effluents - Summation of All Releases 11 Table A - 2 Gaseous Effluents for Elevated Release Point - North Stack 12 Table A - 3 Gaseous Effluents for Ground Level Release Points - Unit 1 South Stack 13 Table A - 4 Gaseous Effluents for Ground Level Release Points - Unit 2 South Stack 14 Table A - 5 Gaseous Effluents for Ground Level Release Points - Hot Maintenance Shop 15 Table A - 6 Gaseous Effluents for Ground Level Release Points - Oil Incineration 16 Table A - 7 Gaseous Effluents for Ground Level Release Points - Other Batch Releases 17 Table A-8 Liquid Effluents-Summation of All Releases 18 Table A - 9 Liquid Effluents Release Points - Liquid Radwaste 19 Page 9

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC TABLE A -1 GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES PERIOD 2006 A.

FISSION AND ACTIVATION GASSES Est. Total Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Error %

1. Total Release Ci 8.22E+00 1.80E+01 1.29E+01 8.96E-01 3.66E+01

2. Average Release Rate for Period uCi/sec 1.05E+00 2.29E+00 1.63E+00 1.14E-01

3. Dose mrad 8.85E-03 1.78E-02 1.28E-02 1.41 E-03

- Gamma Air Dose

- Beta Air Dose mrad 6.OOE-03 1.11 E-02 7.95E-03 8.28E-04

4. Percent of ODCM Limit 8.85E-02 1.78E-01 1.28E-01 1.41 E-02

- Gamma Air Dose

- Beta Air Dose 3.OOE-02 5.55E-02 3.98E-02 4.14E-03 B.

IODINES Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Est. Total Error %

1. Total 131 Ci 2.31 E-05

<LLD

<LLD 2.04E+01

2. Average Release Rate for Period uCi/sec 2.93E-06

<LLD

3. Percent of ODCM Limit C.

PARTICULATES Est. Total Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Erroral Error %

1. Particulates with T 1/2 > 8 days Ci 1.22E-03 1.02E-05 8.42E-06 3.74E-10 2.26E+01

2. Average Release Rate for Period uCi/sec 1.55E-04 1.30E-06 1.07E-06 4.77E-1 1

3. Percent of ODCM Limit

4. Gross Alpha Radioactivity Ci

<LLD

<LLD D.

TRITIUM Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Est. Total Error %

1. Total Release Ci 4.84E+00 5.65E+00

<LLD

<LLD 1.57E+01

2. Average Release Rate for Period uCi/sec 6.16E-01 7.19E-01

<LLD

3. Percent of ODCM Limit E.

Iodine 131 & 133, Tritium & Particulate Units Qtr 1 Qtr 2 Qtr 3 Qtr4

1. Organ Dose mrem 1.25E-02 1.34E-02 9.97E-07 1.09E-09

2. Percent of ODCM Limit 8.33E-02 8.93E-02 6.65E-06 7.27E-09

ODCM Limit is for combined Iodine, tritium and particulate only, which is shown in Item E.

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC TABLE A - 2 GASEOUS EFFLUENTS FOR RELEASE POINT - NORTH STACK PERIOD 2006

1.

FISSION AND ACTIVATION GASSES Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 AR-41 Ci

<LLD

<LLD KR-85 Ci 2.02E-01 3.20E-03 6.91 E-03 3.95E-02 KR-85M Ci 5.35E-02 8.46E-04 1.83E-03 1.05E-02 KR-87 Ci 9.38E-02 1.48E-03 3.21 E-03 1.83E-02 KR-88 Ci 1.66E-01 2.62E-03 5.67E-03 3.24E-02 XE-131 M Ci 5.07E-03 8.OOE-05 1.73E-04 9.90E-04 XE-133 Ci 1.97E+00 2.98E-04 6.45E-04 3.69E-03 XE-135 Ci 1.80E+00 1.17E-02 2.52E-02 1.44E-01 XE-135M Ci 1.14E+00 7.44E-03 1.61E-02 9.20E-02 XE-138 Ci 1.01 E+00 1.60E-02 3.45E-02 1.97E-01 Total for Period Ci 6.43E+00 4.36E-02 9.42E-02 5.39E-01

2.

IODINES Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 1-131 Ci

<LLD

<LLD 1-133 Ci

<LLD

<LLD 1-135 Ci

<LLD

<LLD Total for Period Ci

<LLD

3.

PARTICULATES (T 1/2 > 8 DAYS)

Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 SR-89 Ci

<LLD

<LLD SR-90 Ci

<LLD

<LLD CS-1 34 Cil

<LLD

<LLD CS-1 37 Ci

<LLD

<LLD BA-140 Ci

<LLD

<LLD LA-140 Ci

<LLD

<LLD CE-141 Ci

<LLD

<LLD CR-51 Ci

<LLD

<LLD MN-54 Ci

<LLD

<LLD CO-58 Ci

<LLD

<LLD CO-60 Ci

<LLD

<LLD MO-99 Ci

<LLD

<LLD AG-110M Ci

<LLD

<LLD CE-1 44 Ci

<LLD

<LLD Total for Period Ci

<LLD

<LLD Page 12

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC TABLE A - 3 GASEOUS EFFLUENTS FOR RELEASE POINT - UNIT 1 SOUTH STACK PERIOD 2006

1.

FISSION AND ACTIVATION GASSES Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 AR-41 Ci 8.67E-03 1.11E+00 8.93E-01 1.60E-02 KR-85 Ci

<LLD

<LLD KR-85M Ci 2.08E-03 2.65E-01 2.14E-01 3.83E-03 KR-87 Ci 2.08E-03 2.65E-01 2.14E-01 3.83E-03 KR-88 Ci 2.08E-03 2.65E-01 2.14E-01 3.83E-03 XE-133 Ci 4.51E-02 5.75E+00 4.64E+00 8.29E-02 XE-135 Ci 2.36E-02 3.01E+00 2.42E+00 4.34E-02 XE-135M Ci 3.19E-02 4.07E+00 3.28E+00 5.87E-02 XE-138 Ci 4.86E-03 6.20E-01 5.OOE-01 8.94E-03 Total for Period Ci 1.20E-01 1.54E+01 1.24E+01 2.21 E-01

2.

IODINES Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 1-131 Ci

<LLD

<LLD 1-133 Ci

<LLD

<LLD 1-135 Ci

<LLD

<LLD Total for Period Ci

<LLD

3.

PARTICULATES (T 1/2 > 8 DAYS)

Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 SR-89 Ci

<LLD

<LLD SR-90 Ci

<LLD

<LLD CS-134 Ci

<LLD

<LLD CS-1 37 Ci

<LLD

<LLD BA-140 Ci

<LLD

<LLD LA-140 Ci

<LLD

<LLD CE-141 Ci

<LLD

<LLD CR-51 Ci

<LLD

<LLD MN-54 Ci 1.14E-05

<LLD

<LLD CO-58 Ci

<LLD

<LLD CO-60 Ci 1.59E-05

<LLD

<LLD MO-99 Ci

<LLD

<LLD AG-110M Ci

<LLD

<LLD CE-1 44 Ci

<LLD

<LLD ND-147 Ci

<LLD 9.86E-06

<LLD

<LLD Total for Period Ci 2.73E-05 9.86E-06

<LLD

<LLD Page 13

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC TABLE A - 4 GASEOUS EFFLUENTS FOR RELEASE POINT - UNIT 2 SOUTH STACK PERIOD 2006

1.

FISSION AND ACTIVATION GASSES Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 AR-41 Ci 1.17E-01 1.90E-01 2.76E-02 9.74E-03 KR-85 Ci

<LLD

<LLD KR-85M Ci 2.80E-02 4.54E-02 6.60E-03 2.34E-03 KR-87 Ci 2.80E-02 4.54E-02 6.60E-03 2.34E-03 KR-88 Ci 2.80E-02 4.54E-02 6.60E-03 2.34E-03 XE-133 Ci 6.61 E-01 9.85E-01 1.43E-01 5.06E-02 XE-135 Ci 3.18E-01 5.15E-01 7.49E-02 2.65E-02 XE-135M Ci 4.30E-01 6.97E-01 1.01E-01 3.58E-02 XE-138 Ci 6.55E-02 1.06E-01 1.54E-02 5.46E-03 Total for Period Ci 1.68E+00 2.63E+00 3.82E-01 1.35E-01

2.

IODINES Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 1-131 Ci 2.31 E-05

<LLD

<LLD 1-133 Ci

<LLD

<LLD 1-135 Ci

<LLD

<LLD Total for Period Ci 2.31 E-05

<LLD

3.

PARTICULATES (T 1/2 > 8 DAYS)

Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 SR-89 Ci

<LLD

<LLD SR-90 Ci

<LLD

<LLD CS-134 Ci

<LLD

<LLD CS-137 Ci

<LLD

<LLD BA-140 Ci

<LLD

<LLD LA-140 Ci

<LLD

<LLD CE-141 Ci

<LLD

<LLD CR-51 Ci 2.11E-05

<LLD

<LLD MN-54 Ci 1.66E-05

<LLD

<LLD CO-58 Ci 2.39E-06

<LLD

<LLD CO-60 Ci 1.32E-05

<LLD

<LLD MO-99 Ci

<LLD

<LLD AG-110M Ci

<LLD

<LLD CE-144 Ci

<LLD

<LLD ND-147 Ci

<LLD

<LLD 8.42E-06

<LLD FE-59 Ci 9.58E-06

<LLD

<LLD Total for Period Ci 6.28E-05

<LLD 8.42E-06

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC TABLE A - 5 GASEOUS EFFLUENTS FOR RELEASE POINT - HOT MAINTENANCE SHOPPERIOD 2006

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 1-133 Ci

<LLD

<LLD 1-135 Ci

<LLD

<LLD Total for Period Ci

<LLD

3.

PARTICULATES (T 1/2 > 8 DAYS)

Nuclide Released Continuous Mode Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 SR-89 Ci

<LLD

<LLD SR-90 Ci

<LLD

<LLD CS-1 34 Ci

<LLD

<LLD CS-137 Ci

<LLD

<LLD BA-140 Ci

<LLD

<LLD LA-140 Ci

<LLD

<LLD CE-141 Ci

<LLD

<LLD CR-51 Ci

<LLD

<LLD MN-54 Ci

<LLD

<LLD CO-58 Ci

<LLD

<LLD CO-60 Ci

<LLD

<LLD MO-99 Ci

<LLD

<LLD AG-110M Ci

<LLD

<LLD CE-144 Ci

<LLD

<LLD Total for Period Ci

<LLD

<LLD Page 15

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC TABLE A - 6 GASEOUS EFFLUENTS FOR RELEASE POINT - OIL INCINERATION PERIOD 2006

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 SR-89 Ci N/A N/A N/A N/A SR-90 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 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 MO-99 Ci N/A N/A N/A N/A AG-11OM 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 FE-55 Ci N/A N/A N/A N/A Total for Period Ci N/A N/A N/A N/A Page 16

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC TABLE A -7 GASEOUS EFFLUENTS FOR RELEASE POINT - OTHER BATCH RELEASES PERIOD 2006

1.

FISSION AND ACTIVATION GASSES Nuclide Released Batch Release Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 AR-41 Ci

<LLD

<LLD KR-85 Ci

<LLD

<LLD KR-85M Ci

<LLD

<LLD KR-87 Ci

<LLD

<LLD KR-88 Ci

<LLD

<LLD XE-1 33 Ci

<LLD

<LLD XE-1 35 Ci

<LLD

<LLD XE-135M Ci

<LLD

<LLD XE-1 38 Ci

<LLD

<LLD Total for Period Ci

<LLD

2.

IODINES Nuclide Released Batch Release Units Qtr I Qtr 2 Qtr 3 Qtr 4 1-131 Ci

<LLD

<LLD 1-133 Ci

<LLD

<LLD 1-135 Ci

<LLD

<LLD Total for Period Ci

<LLD

3.

PARTICULATES (T 1/2 > 8 DAYS)

Nuclide Released Batch Release Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 SR-89 Ci

<LLD

<LLD SR-90 Ci

<LLD

<LLD CS-134 Ci

<LLD

<LLD CS-137 Ci

<LLD

<LLD BA-140 Ci

<LLD

<LLD LA-140 Ci

<LLD

<LLD CR-51 Ci 4.70E-04

<LLD

<LLD MN-54 Ci 2.49E-04

<LLD

<LLD 1.26E-10 CO-58 Ci 4.57E-05

<LLD

<LLD CO-60 Ci 2.02E-04 3.77E-07

<LLD 2.48E-10 MO-99 Ci

<LLD

<LLD AG-110M Ci

<LLD

<LLD CE-141 Ci

<LLD

<LLD CE-144 Ci

<LLD

<LLD ZN-65 Ci 4.74E-05

<LLD

<LLD ZR-95 Ci 4.70E-06

<LLD

<LLD NB-95 Ci 5.30E-06

<LLD

<LLD FE-59 Ci 1.OOE-04

<LLD

<LLD ND-147 Ci 6.78E-07

<LLD

<LLD Total for Period Ci 1.13E-03 3.77E-07

<LLD 3.74E-10 Page 17

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC TABLE A - 8 LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES PERIOD 2006 A. FISSION AND ACTIVATION PRODUCTS Est. Total Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Erroral Error %

1. Total release (not including tritium, Ci 1.24E-03 5.33E-04 5.13E-04 6.61E-04

.11E+01 gasses & alpha)

2. Average diluted concentration during uCi/ml 1.45E-08 7.81 E-09 5.82E-09 7.81 E-09 batch discharge for the period

3. Dose

- Whole Body mrem 5.57E-04 3.22E-04 5.90E-04 5.31 E-04

- Organ mrem 7.21E-04 3.23E-04 8.39E-04 5.32E-04

4. % of ODCM Limit - Whole Body Dose*

1.86E-02 1.07E-02 1.97E-02 1.77E-02

- Organ Dose*

7.21 E-03 3.23E-03 8.39E-03 5.32E-03 B.

TRITIUM I

[Est. Total Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Erroral Error %

1. Total Release Ci 1.05E+01 1.05E+01 1.72E+01 1.54E+01 6.43E+00

2. Average diluted concentration during uCi/ml 1.23E-04 1.54E-04 1.95E-04 1.82E-04 batch discharge for the period

[3. % of ODCM Limit - MPC 4.1OE+00 5.13E+00 6.50E+00 6.07E+00 C. DISSOLVED AND ENTRAINED GASSES TEst. Total Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 EError %

1. Total release Ci 1.42E-03 1.62E-04 1.35E-04 1.23E-04 2.11E+01

2. Average diluted concentration during uCi/ml 1.66E-08 2.37E-09 1.53E-09 1.45E-09 batch discharge for the period

3. %of ODCM Limit-MPC 8.30E-03 1.19E-03 7.65E-04 7.24E-04 D. GROSS ALPHA RADIOACTIVITY Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Est. Total Error %

1. Total release Ci

<LLD 2.19E-05

<LLD

<LLD 2.30E+01

2. Average diluted concentration during uCi/ml

<LLD 3.20E-10

<LLD

<LLD batch discharge for the period Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Est. Total Error %

Volume of waste released (prior to olueof wtrLiters 3.01E+06 3.75E+06 2.69E+06 2.55E+06 5.OOE+00 dilution)__

Volume of dilution water used during Liters 8.56E+07 6.82E+07 8.82E+07 8.46E+07 3.56E+00

)eriod Percent of limit includes tritium.

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC TABLE A - 9 LIQUID EFFLUENTS FOR RELEASE POINT - LIQUID RADWASTE PERIOD 2006 Nuclide Released Batch Release Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 SR-89 Ci

<LLD

<LLD SR-90 Ci

<LLD

<LLD CS-134 Ci

<LLD

<LLD 3.27E-06

<LLD CS-137 Ci 4.98E-05 2.03E-05 1.35E-04 3.87E-05 1-131 Ci 1.68E-05

<LLD

<LLD 8.09E-07 CO-58 Ci 4.11E-05 1.19E-05

<LLD 2.88E-06 CO-60 Ci 4.11 E-04 2.57E-04 2.03E-04 3.63E-04 FE-59 Ci 9.69E-05 2.16E-06

<LLD

<LLD ZN-65 Ci 1.42E-05 2.88E-06 8.15E-06 7.21 E-05 MN-54 Ci 4.24E-04 1.93E-04 7.28E-05 1.36E-04 CR-51 Ci 1.59E-04 7.68E-06

<LLD

<LLD ZR-95 Ci

<LLD

<LLD NB-95 Ci

<LLD

<LLD MO-99 Ci

<LLD

<LLD TC-99M Ci

<LLD

<LLD BA-140 Ci

<LLD 2.25E-06

<LLD

<LLD LA-140 Ci 6.20E-06

<LLD

<LLD CE-141 Ci

<LLD

<LLD 8.09E-07 6.15E-07 AG-110M Ci

<LLD

<LLD FE-55 Ci

<LLD

<LLD SB-125 Ci 1.63E-05 1.61 E-05 5.99E-05 2.11E-05 SB-124 Ci 1.40E-06 9.95E-06 4.92E-06

<LLD RB-86 Ci 5.59E-06

<LLD

<LLD ND-147 Ci

<LLD 9.30E-06 1.63E-05 4.07E-06 BA-139 Ci

<LLD

<LLD 7.23E-07

<LLD BA-141 Ci

<LLD

<LLD 1.73E-06

<LLD CE-143 Ci

<LLD

<LLD 1.18E-06

<LLD CE-144 Ci

<LLD

<LLD 2.90E-06 NA-24 Ci

<LLD

<LLD 5.44E-06 1,88E-05 RU-105 Ci 2.47E-06

<LLD

<LLD TC-101 Ci

<LLD

<LLD 2.98E-07

<LLD Y-91 M Ci

<LLD

<LLD 4.20E-07

<LLD Total for Period Ci 1.24E-03 5.33E-04 5.13E-04 6.61E-04 AR-41 Ci 2.OOE-06

<LLD

<LLD KR-85 Ci 1.62E-04 1.07E-04

<LLD

<LLD XE-133M Ci 5.90E-06

<LLD

<LLD XE-133 Ci 9.58E-04 3.77E-05 1.09E-04 1.02E-04 XE-135 Ci 2.97E-04 1.71E-05 2.59E-05 2.08E-05 Total for Period Ci 1.42E-03 1.62E-04 1.35E-04 1.23E-04 Page 19

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Appendix B Solid Waste and Irradiated Fuel Shipments Page 21

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC A. Solid waste shipped offsite for burial or disposal (not irradiated fuel) 1/1/06 - 12/31/06

1. Type of Waste

b. Dry compressible waste, contaminated equipment, m'

51.02 25%

etc.

Ci 6.89E+00

c. Irradiated components, control rods, etc.

m' None 25%

Ci None Id. Other (Describe) m' None N/A Ci None

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 1.08E+00 0.61%

9.06E-02 0.02%

Mn-54 5.96E+01 33.47%

1.80E+01 4.52%

Fe-55 8.36E+00 4.69%

2.24E+02 56.28%

Co-58 5.14E+00 2.88%

2.17E-01 0.05%

Co-60 8.20E+01 46.05%

1.40E+02 35.17%

Ni-63 3.97E+00 2.22%

3.93E+00 0.99%

Zn-65 1.09E+01 6.11%

9.97E+00 2.50%

Cs-137 3.01E+00 1.67%

1.21E+00 0.30%

Cr-51 3.51E+00 1.96%

1.63E-01 0.04%

Fe-59 5.45E-01 0.30%

3.05E-04 0.00%

H-3 3.97E-02 0.02%

1.06E-02 0.00%

Sr-89 0.OOE+00 0.00%

2.54E-01 0.06%

Sr-90 3.44E-02 0.01%

1.51E-01 0.03%

Cs-134 2.59E-02 0.01%

1.76E-01 0.04%

TOTALS 1.78E+02 100.00%

3.98E+02 100.00%

Activity is estimated Page 23

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Category B - Dry Compressible Waste, Contaminated Equipment, etc.

Waste Class A Waste Class B Curies Percent Curies Percent Isotope (estimated)

Abundance (estimated)

Abundance Cr-51 1.02E+00 14.81%

Mn-54 1.57E+00 22.79%

Fe-55 1.49E+00 21.63%

Co-58 2.67E-01 3.88%

Co-60 1.99E+00 28.88%

Fe-59 2.48E-01 3.60%

Zn-65 3.04E-01 4.41%

TOTALS 6.89E+00 100.00%

Category C - Irradiated Components, Control Rods, etc.

None

3.

Solid Waste (Disposition)

Number of Shipments Mode of Transportation Destination 6

Truck Studsvik (THOR) to Barnwell 9

Truck Studsvik (THOR) to Energy Solutions / Clive 24 Truck Duratek to Energy Solutions / Clive 6

Rail Alaron to Energy Solutions / Clive 8

Truck Limerick Gen. Sta. To Energy Solutions / Clive 1

Truck Limerick Generating Station to Barnwell Comments:

15 Shipments were made from Limerick to Duratek for processing 8 Shipments were made from Limerick to Alaron for processing 9 Shipments were made from Limerick to Studsvik (THOR) for processing No solidifications were performed Category A - 32 shipments Type A LSA Category A -

3 shipments > Type A LSA Category A -

1 shipments Type B Category B - 53 shipments Type A LSA Category C - No shipments made Category D - No shipments made B. Irradiated Fuel Shipments (disposition)

Number of Shipments Mode of Transportation Destination 0

N/A N/A C. Changes to the Process Control Program There were no revisions to procedure RW-AA-1 00, "Process Control Program For Radioactive Wastes".

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Appendix C Dose Calculations Page 25

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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 (2.4035E+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 2.19E-03 All 762 SE 1.1OE-02 20 mRad Noble Gas Beta - Air Dose 1.38E-03 All 762 SE 3.45E-03 40 mRad Noble Gas Total Body (Gamma) 1.45E-03 All 762 SE 1.45E-02 10 mrem Noble Gas Skin (Beta) 2.71 E-03 All 762 SE 9.03E-03 30 mrem

Iodine, Particulate & Thyroid 4.71 E-03 Infant 762 SE 1.57E-02 30 mrem Tritium Liquid Total Body 2.16E-03 Child Phila. Sub. Water 3.60E-02 6

mrem Liquid Liver 2.32E-03 Teen LGS Outfall 1.16E-02 20 mrem Doses calculated were well below all ODCM and 40 CFR Part 190 limits of 25 mrem to a real individual.

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.

The x/Q, x/Q depleted and D/Q for the highest exposed sector for the railroad tracks (W), and the sectors enclosing Security Checkpoint, Frick's Lock and the Information Center available for occupancy were used.

The maximum expected occupancy factor is 25% of a working year in all locations.

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EXELON GENERATION COMPANY, LLC 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,

DOSE, Location Sector (meters)

MRAD(1)

MRAD(2)

MREM(3)

Frick's Lock WSW 450 1.63E-04 1.03E-04 1.08E-04 Info. Center ESE 884 2.47E-04 1.56E-04 2.08E-04 R.R. Tracks W

225 8.31 E-04 5.26E-04 4.82E-04 National Guard / Security NNE 682 1.25E-04 7.94E-05 1.13E-04 Check Point 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)

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Appendix D Meteorological Data Page 29

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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, 2006 33 Table D - 2 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January - March, 2006 40 Table D - 3 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, April - June, 2006 47 Table D - 4 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, April - June, 2006 54 Table D - 5 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, July - September, 2006 61 Table D - 6 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, July - September, 2006 68 Table D - 7 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, October - December, 2006 75 Table D - 8 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, October - December, 2006 82 Table D - 9 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January - December, 2006 89 Table D - 10 Wind Speed Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January - December, 2006 91 Table D - 11 Annual X/Q, X/Q depleted and D/Q values for the North Stack, Limerick Generating Station, 2006 93 Table D - 12 Annual X/Q, X/Q depleted and D/Q values for the South Stack, Limerick Generating Station, 2006 95 Page 31

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Table D -

LIMERICK GENERATING STATION - UNITE EXELON GENERATION COMPANY, LLC 1 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January -

March, 2006 Limerick Nuclear Station Period of Record: January -

March 2006 Class -

Extremely Unstable 266Ft-26Ft Winds Measured at 30 Feet Stability 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 0

0 0

0 Total 0

0 0

0 Total 0

0 0

0 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 33

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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, 2006 Limerick Nuclear Station Period of Record: January -

March 2006 Stability Class - Moderately Unstable 266Ft-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 Total 1-3 4-7 8-12 13-18 19-24

> 24 0

0 0

2 1

0 0

0 3

0 0

0 1

0 0

2 0

0 0

0 1

0 0

1 0

0 0

0 Total 0

0 0

0 3

3 1

2 0

1 0

0 0

4 5

1 1

0 11 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 34

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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, 2006 Limerick Nuclear Station Period of Record: January -

March 2006 Stability Class - Slightly Unstable 266Ft-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

0 0

1 0

2 0

10 2

0 0

0 2

0 0

0 3

2 2

3 8

4 21 7

1 0

Total 0

14 22 15 2

0 53 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:

0 Page 35

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LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Period of Record: January -

March 2006 Stability Class -

Neutral 266Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total Wind Speed (in mph) 1-3 4-7 8-12 13-18 19-24

> 24 Total 3

21 12 4

15 7

13 6

16 2

6 5

12 8

14 4

10 4

13 3

13 4

15 2

16 3

13 4

3 4

7 5

3 0

36 0

21 0

26 0

27 0

36 0

18 0

20 0

26 0

19 0

63 0

91 0

176 11 22 25 7

33 40 10 6

51 67 40 12 3

50 158 0

17 42 139 6

0 205 53 10 413 3

0 0

68 0

0 0

397 0

0 79 326 69 10 1086 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:

0 Page 36

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LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Period of Record: January -

March 2006 Stability Class - Slightly Stable Winds Measured at 266Ft-26Ft Delta-T (F) 30 Feet Wind Speed (in mph)

Wind Direction N

1-3 2

4-7 8-12 13-18 19-24

> 24 Total 7

NNE NE ENE E

9 14 0

2 4

6 9

8 2

8 0

0 0

0 1

0 0

9 11 14 16 ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 9

12 7

10 10 27 3

5 4

16 33 16 11 22 19 14 2

1 30 19 10 27 48 13 0

1 2

4 3

2 0

3 1

5 0

0 22 0

25 0

15 0

22 0

42 0

24 0

23 0

46 0

69 0

38 0

36 0

59 0

91 0

98 0

87 0

23 25 64 8

14 44 24 4

13 0

211 0

351 6

0 120 0

0 0

707 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:

0 Page 37

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LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Stability Period of Record: January -

March 2006 Class -

Moderately Stable 266Ft-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 1-3 4-7 8-12 13-18 19-24

> 24 Total 0

0 0

3 5

6 5

6 0

0 0

0 4

7 2

4 7

6 WSW W

WNW 7

7 6

7 1

0 4

5 3

2 1

0 NW NNW Variable Total 0

0 0

0 9

9 2

0 0

11 0

12 66 32 0

98 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:

0 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, 2006 Limerick Nuclear Station Period of Record: January -

March 2006 Stability Class -

Extremely Stable 266Ft-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

2 0

0 0

2 NNE 1

0 0

0 1

NE 1

0 0

0 1

ENE 1

0 0

0 1

E

0.

0 0

ESE 1

0 0

0 1

SE 0

0 0

SSE 0

0 0

S 0

0 0

SSW 2

0 0

0 2

SW 0

0 0

WSW 2

0 0

0 2

W 7

0 0

0 7

WNW 5

0 0

0 5

NW 6

0 0

0 6

NNW 0

0 0

Variable 0

0 0

Total 28 0

0 0

28 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 39

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, 2006 Limerick Nuclear Station Period of Record: January -

March 2006 Class -

Extremely Unstable 266Ft-26Ft Winds Measured at 175 Feet Stability 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 Hours of calm in Hours of missing 1-3 4-7 8-12 13-18 19-24

> 24 0

0 0

0

.0 0

0 0

Total 0

0 0

0 this stability class:

0 wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

7, Page 40

SITE:

LICENSEE:

LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Period of Record: January -

March 2006 Stability Class - Moderately Unstable 266Ft-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 Total 1-3 0

0 0

0 4-7 0

0 0

0 1

0 0

1 8-12 13-18 19-24

> 24 Total 1

11 Hours of calm in Hours of missing Hours of missing this stability class:

wind measurements in this stability measurements in 0

stability class:

all stability cl 0

asses :

7 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, 2006 Limerick Nuclear Station Period of Record: January -

March 2006 Stability Class -

Slightly Unstable 266Ft-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 0

0 0

0 2

0 0

1 0

0 0

2 1

1 3

2 5

2 3

1 0

0 0

0 1

2 0

2 10 0

0 0

19-24 0

0 0

2 0

6 0

0 0

> 24 0

0 0

1 0

1 1

3 0

0 0

Total 0

2 0

0 0

2 2

3 6

5 8

21 3

1 0

Total 0

4 20 15 8

6 53 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:

7 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, 2006 Stability Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Limerick Nuclear Station Period of Record: January -

March 2006 Class -

Neutral 266Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph) 1-3 4-7 8-12 13-18 19-24

> 24 Total 0

1 2

3 4

1 3

1 1

1 4

9 3

1 2

1 0

12 15 10 11 4

11 11 10 14 2

5 8

22 14 13 12 0

13 11 10 8

10 5

5 7

16 17 12 19 39 70 68 39 0

349 2

4 5

1 12 2

2 2

5 4

7 14 27 77 81 33 0

0 0

0 2

0 20 15 59 66 7

0 169 0

0 0

1 2

2 3

29 41 5

0 27 31 27 23 30 19 21 20 36 27 30 72 109 250 271 97 0

Total 37 174 278 83 1090 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

5 Hours of missing stability measurements in all stability classes:

7 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, 2006

'Limerick Nuclear Station Period of Record: January -

March 2006 Stability Class -

Slightly Stable 266Ft-26Ft Delta-T (F)ý 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 0

3 5

10 1

3 3

2 2

3 3

3 1

1 0

6 2

5 7

8 9

8 11 19 24 18 26 24 23 13 4

0 8-12 13-18 19-24

> 24 Total 12 0

0 0

18 11 3

0 0

19.

2 4

0 0

16 7

0 0

0 24 11 11 1

0 32 8

6 0

0 26 10 3

1 0

25 7

5 1

3 29 34 20 6

1 82 27 6

3 3

66 10 7

0 0

38 19 15 1

0 64 43 10 5

0 83 65 10 2

0 103 39 19 1

0 73 14 5

0 0

24 0

0 0

Total 44 207 319 124 21 7

722 13 Hours of calm in this stability class:

1 Hours of missing wind measurements in this stability class:

Hours of missing stability measurements in all stability classes:

7 Page 44

SITE:

LICENSEE:

LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Period of Record: January -

Stability Class - Moderately Stable Winds Measured at 175 March 2006 266Ft-26Ft Delta-T (F)

Feet Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total Wind Speed (in mph) 8-12 13-18 19-24

> 24 Total 1-3 2

1 3

4 1

1 4

0 0

0 2

4-7 0

3 1

3 4

1 3

6 5

7 7

0 0

2 5

4 7

6 8

9 7

8 2

4 3

3 1

0 4,

6 7

6 8

12 1

2 0

5 2

0 44 1

0 2

0 0

0 4

0 0

12 0

14 0

16 0

25 0

0 0

9 5

0 31 61 0

140 Hours of calm in Hours of missing Hours of missing this stability class:

wind measurements in this stability measurements in 0

stability class:

all stability cl 13 asses:

7 Page 45

SITE:

LICENSEE:

Table D. -

LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC 2 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January -

March, 2006 Limerick Nuclear Station Period of Record: January -

March 2006 Class -

Extremely Stable 266Ft-26Ft Winds Measured at 175 Feet Stability 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 2

3 1

4 9

3 5

4 3

7 10 5

14 12 2

4 0

Total 45 36 7

0 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:

all stability cl 17 asses:

7 Page 46

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, 2006 Limerick Nuclear Station Period of Record: April -

June 2006 Stability Class -

Extremely Unstable 266Ft-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

0 0

1 0

0 0

1 5

6 6

5 6

0 0

0 Total 1

29 0

0 0

0 30 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in.all stability classes:

0 Page 47

SITE:

LICENSEE:

LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Period of Record: April -

June 2006 Stability Class -

Moderately Unstable 266Ft-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 0

0 0

2 1

0 0

0 2

0 1

3 0

0 0

3 8

3 3

6 4

2 0

0 0

2 5

0 0

6 0

1 1

2 0

0 0

0 1

0 0

0 1

0 0

0 2

0 0

2 0

3 8

1 0

0 3

0 14 SW WSW W

WNW NW NNW Variable Total 0

0 0

3 6

8 7

2 0

0 3

35 17 0

57 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:

0 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, 2006 Limerick Nuclear Station Period of Record: April -

June Stability Class -

Slightly Unstable 26 2006 6Ft-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

0 0

1 0

1 1

0 0

3 0

0 6

7 2

0 0

2 4

1 6

9 6

10 4

0 4

1 0

2 5

0 0

0 2

1 2

0 5

4 13 4

0 0

0 1

2 0

0 0

5 11 1

'0*

7 1

0 9

13 5

0 1

4 6

4 7

15 15 34 9

0 Total 7

60 43 20 0

0 130 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stabili Hours of missing stability measurements in all sta ty class:

bility cl 0

asses :

0 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, 2006 Limerick Nuclear Station Period of Record: April -

June 2006 Stability Class - Neutral Winds Measured at 266Ft-26Ft Delta-T (F) 30 Feet Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Wind Speed (in mph) 1-3 4-7 8-12 13-18 19-24

> 24 Total 4

5 7

5 4

3 7

6 5

12 12 11 9

14 11 7

0 30 14 18 35 20 5

9 5

15 13 9

26 33 39 50 37 0

21 8

2 16 34 6

3 11 11 3

3 3

6 43 98 38 0

2 0

0 0

14 5

0 0

2 11 49 9

0 92 57 27 27 56 72 19 19 22 31 28 24 40 50 108 209 91 0

Total 122 358 306 2

0 880 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 50

SITE:

LICENSEE:

LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Period of Record: April -

June 2006 Stability Class - Slightly Stable Winds Measured at 266Ft-26Ft Delta-T (F) 30 Feet Wind Direction Wind Speed (in mph) 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 10 15 8

18 9

1 1

1 0

0 0

0 9

4 12 16 13 28 13 4

15 5

15 1

5 11 19 10 0

34 0

27 0

14 0

29 0

57 0

20 0

25 0

40 0

32 0

34 0

43 0

48 0

49 0

88 0

49 8

21 19 14 32 10 37 11 3

1 1

0 0

8 40 9

42 37 NW NNW Variable Total 24 51 12 10 32 0

284 0

315 7

0 73 1

0 0

5 0

0 0

677 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:

0 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, 2006 Limerick Nuclear Station Period of Record: April -

June 2006 Stability Class -

Moderately Stable Winds Measured at 266Ft-26Ft Delta-T (F) 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 6

1 5

2 8

4 3

1 4

9 13 8

11 34 15 5

0 0

1 0

0 1

1 2

0 1

0 0

0 2

12 4

0 0

8-12 13-18 19-24

> 24 0

0 0

0 Total 6

2 5

2 9

5 5

1 5

9 13 8

13 46 19 5

0 Total 129 24 0

0 0

0 153 0

es:

0 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

Hours of missing stability measurements in all stability cl ass 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, 2006 Limerick Nuclear Station Period of Record: April -

June 2006 Stability Class -

Extremely Stable Winds Measured at 266Ft-26Ft Delta-T (F) 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

4 0

2 0

0 0

1 0

3 2

5 12 20 9

6 0

69 5

4 0

2 0

0 0

1 0

3 2

5 12 22 9

6 0

Total 2

0 0

71 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 53

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, 2006 Limerick Nuclear Station Period of Record: April -

June 2006 Class -

Extremely Unstable 266Ft-26Ft Winds Measured at 175 Feet Stability 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 0

0 0

8-12 13-18 19-24

> 24 0

0 0

0 1

0 0

0 6

0 0

0 3

0 0

0 5

0 0

0 6

0 0

0 1

0 0

0 Total 0

0 0

0 1

6 6

8 8

1 0

0 0

Total 0

8 22 0

0 0

30 Hours of calm in Hours of missing this stability class:

0 wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

2 Page 54

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, 2006 Stability Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Limerick Nuclear Station Period of Record: April -

June 2006 Class - Moderately Unstable 266Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph) 1-3 4-7 0

0 0

8-12 13-18 19-24

> 24 0

0 0

0 2

0 0

0 1

3 0

0 4

1 0

0 0

0 1

0 0

0 4

0 0

0 7

3 0

0 5

1 0

0 2

2 0

0 4

1 0

1 2

0 0

0 Total 0

2 0

5 6

1 0

0 5

11 6

7 8

5 1

0 0

Total 0

13 31 11 1

1 57 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in.all stability classes:

2 Page 55

SITE:

LICENSEE:

LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Period of Record: April -

June 2006 Stability Class - Slightly Unstable 266Ft-26Ft Winds Measured at 175 Feet Delta-T (F)

Wind Direction N

NNE NE Wind Speed (in mph) 8-12 13-18 19-24 1-3

.1 0

1 4-7 2

0 1

> 24 Total ENE E

ESE SE SSE S

SSW 0

0 0

1 5

1 0

6 3

0 0

0 1

2 2

6 7

0 0

0 10 0

11 0

0 0

2 1

1 4

5 5

8 2

SW WSW 0

W WNW NW NNW Variable Total 2

0 0

0 10 0

16 0

32 0

12 3

3 1

0 9

12 6

5 0

1 3

0 8

2 0

0 0

0 9

0 5

29 53 28 14 0

129 Hours of calm in Hours of missing Hours of missing this stability class:

1 wind measurements in this stability class:

0 stability measurements in all stability classes:

2 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, 2006 Limerick Nuclear Station Period of Record: April -

June 2006 Stability Class - Neutral 266Ft-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

1 20 34 8

1 0

64 NNE 4

11 12 2

0 0

29 NE 4

15 11 2

0 0

32 ENE 3

15 29 4

0 0

51 E

3 10 19 23 7

0 62 ESE 3

5 10 10 5

0 33 SE 3

6 5

2 0

0 16 SSE 2

4 4

10 2

0 22 S

5 12 10 9

0 0

36 SSW 6

8 10 6

0 0

30 SW 5

13 7

2 1

0 28 WSW 4

9 21 11 3

0 48 W

10 17 33 14 5

1 80 WNW 2

22 53 54 29 3

163 NW 5

20 33 38 9

1 106 NNW 2

18 34 20 6

0 80 Variable 0

0 0

Total 62 205 325 215 68 5

880 Hours of calm in this stability class:

2 Hours of missing wind measurements in this stability class:

7 Hours of missing stability measurements in all stability classes:

2 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, 2006 Limerick Nuclear Station Period of Record: April -

June 2006 Class -

Slightly Stable 266Ft-26Ft Winds Measured at 175 Feet Stability 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 6

9 8

9 10 11 8

9 17 22 20 22 31 29 30 17 0

8-12 13-18 19-24

> 24 Total 19 9

0 0

39 15 4

0 0

31 6

0 0

0 21 13 0

0 0

23 23 12 3

0 56 9

2 0

0 24 9

4 0

0 26 24 15 0

0 52 17 2

1 0

39 21 1

0 0

45 17 1

0 0

39 21 0

0 0

45 12 2

0 0

51 42 14 1

0 90 33 4

0 0

74 32 5

0 0

59 0

0 0

Total 63 258 313 75 5

0 714 8

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

Hours of missing stability measurements in all stability classes:

2 Page 58

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, 2006 Limerick Nuclear Station Period of Record: April -

June 2006 Stability Class -

Moderately Stable 266Ft-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 0

7 0

0 0

0 2

2 2

0 0

0 1

0 0

0 3

6 0

0 0

0 2

3 0

0 0

0 2'

2 2

1 0

0 3

5 1

0 0

0 2

4 3

0 0

0 3

4 3

0 0

0 3

6 1

0 0

0 1

13 4

0 0

10 5

0 0

0 3

4 5

0 0

0 3

13 25 1

0 0

4 14 7

0 0

0 3

9 4

0 0

0 Total 7

6 2

9 5

7 9

9 10 10 18 15 12 42 25 16 0

Total 35 102 63 2

0 0

202 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

11 Hours of missing stability measurements in all stability classes:

2 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, 2006 Limerick Nuclear Station Period of Record: April -

June 2006 Class -

Extremely Stable 266Ft-26Ft Winds Measured at 175 Feet Stability 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 2

2 0

0 0

1 0

1 4

21 4

1 0

8 9

3 2

1 3

2 3

4 5

9 12 15 32 13 6

0 Total 35 56 36 0

0 0

127 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

14 Hours of missing stability measurements in all stability classes:

2 Page 60

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, 2006 Limerick Nuclear Station Period of Record: July - September 2006 Stability Class - Extremely Unstable

- 266Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Directic N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Wind Speed (in mph) 1-3 4-7 8-12 13-18 19-24

> 24 Total 0

0 0

0 1

0 0

0 2

0 0

5 3

0 2

2 1

1 1

2--

20 13 10 8

5 4

2 0

5 5

0 2

2 1

3 21 16 10 8

5 5

2 0

Total 3

79 6

0 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:

0 Page 61

SITE:

LICENSEE:

LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Period of Record: July -

September 2006 Stability Class -

Moderately Unstable 266Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE 1-3 0

0 0

4-7 5

4 2

1 2

2 1

0 1

5 8-12 13-18 19-24

> 24 Total 5

4 2

2 2

2 1

0 1

5 S

SSW SW WSW 0

4 12 1

12 W

WNW NW 0

1 0

0 0

9 1

7 5

0 1

0 0

1 3

6 0

0 0

9 3

0 17 0

13 0

10 0

11 NNW Variable Total 0

0 6

69 12 0

87 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:

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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, 2006 Limerick Nuclear Station Stability Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Period of Record: July -

Septembe Class - Slightly Unstable 266 Winds Measured at 30 Feet Wind Speed (in mph) 1-3 4-7 8-12 13-18 0

5 1

0 0

5 1

0 0

5 0

0 0

4 2

0 2

4 0

0 1

1 0

0 1

0 0

0 2

1 0

0 0

7 3

0 3

7 0

0 2

10 1

0 2

9 0

0 1

14 1

0 0

12 10 3

0 6

1 0

0 0

r 2006

Ft-26Ft Delta-T (F) 19-24 0

0 0

> 24 0

0 0

Total 6

6 5

6 6

2 2

0 3

10 10 13 11 16 25 7

0 Total 14 90 21 this stability class:

3 0

0 128 Hours of calm in Hours of missing 0

wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

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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, 2006 Limerick Nuclear Station Stability Wind Direction Period of Record: July -

Class -

Neutral Winds Measured at Wind Speed September 2006 266Ft-26Ft Delta-T (F) 30 Feet (in mph)

N NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable 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 5

26 1

0 0

0 6

20 0

0 0

0 9

34 0

0 0

0 7

36 8

1 0

0 7

14 8

1 0

0 4

7 1

0 0

0 10 9

3 0

0 0

4 16 4

0 0

0 13 19 4

0 0

0 13 37 4

0 0

0 13 26 1

0 0

0 14 36 1

0 0

0 20 17 0

0 0

0 19 33 5

0 0

0 9

58 39 1

0 0

6 28 11 0

0 0

Total 32 26 43 52 30 12 22 24 36 54 40 51 37 57 107 45 0

Total 159 416 90 3

0 0

668

)

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 Page 64

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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, 2006 Limerick Nuclear Station Period of Record: July September 2006 Stability Class - Slightly Stable 266Ft-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 7

11 17 18 13 4

11 15 23 21 33 36 39 47 21 12 0

9 18 15 13 6

4 14 53 32 4

10 9

24 21 12 0

255 17 29 37 38 32 11 17 30 80 57 37 46 50 71 45 25 0

Total 328 33 6

0 0

622 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stabili Hours of missing stability measurements in all sta ty class:

0 bility classes:

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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, 2006 Limerick Nuclear Station Period of Record: July September 2006 Stability Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Class - Moderately Stable 266 Winds Measured at 30 Feet Wind Speed (in mph)

Ft-26Ft Delta-T (F) 1-3 4-7 4

5 8

8 3

1 2

1 3

9 10 13 43 64 31 15 0

220 8-12 13-18 19-24

> 24 0

0 0

0 Total 4

7 9

8 3

3 5

2 6

10 11 13 43 73 33 15 0

Total 25 0

0 0

0 245 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:

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LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Period of Record: July -

Stability Class -

Extremely Stable Winds Measured at September 2006 266Ft-26Ft 30 Feet Delta-T (F)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

Wind Speed (in mph) 1-3 4-7 8-12 13-18 19-24

> 24 Total SSW SW 3

5 WSW W

WNW NW NNW Variable Total 12 19 10 5

0 61 0

0 1

0 2

0 0

12 0

19 0

10 0

0 6

0 0

63 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:

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LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Period of Record: July -

September 2006 Stability Class -

Extremely Unstable 266Ft-26Ft Winds Measured at 175 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE 1-3 0

0 0

4-7 4

2 0

1 3

0 1

2 1

8-12 13-18 19-24

> 24 Total 1

2 0

0 0

0 4

SSE S

0 0

0 1

2 0

0 0

0 3

0 0

0 5

4 0

1 3

0 1

2 5

SSW SW WSW 0

8 12 0

11 0

0 W

WNW NW NNW Variable Total 0

0 0

0 7

1 0

3 3

0 5

6 6

0 2

0 0

21 0

18 0

13 7

0 5

3 0

0 47 38 0

88 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:

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LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Period of Record: July -

September 2006 Stability Class -

Moderately Unstable 266Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction NNE NE ENE E

ESE SE SSE S

SSW 1-3 0

0 0

0 1

4-7 8-12 13-18 19-24 5

2 1

1 2

0 1

1 0

4 7

4 2

0 2

2 0

1 2

1 1

0 1

0 0

2 6

4 5

7 1

9 5

0 0

0 1

4 1

0 0

1 0

0 0

0 6

4 2

2 2

1 1

1 3

> 24 Total SW WSW W

0 0

0 10 0

12 0

13 0

10 WNW 0

1 NW 0

11 NNW 0

0 8

0 Variable Total 1

34 45 7

0 87 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:

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LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Period of Record: July -

September 2006 Stability Class -

Slightly Unstable 266Ft-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 0

0 1

1 0

0 4-7 8-12 13-18 19-24

> 24 Total 3

5 2

1 1

2 0

0 1

1 4

5 3

2 3

4 3

1 0

0 0

6 5

7 0

0 0

6 7

6 5

5 3

1 2

1 0

0 3

0 0

3 17 2

4 3

0 7

6 3

0 1

2 2

3 1

2 0

0 0

0 1

1 0

0 2

0 11 0

10 0

14 0

25 0

13 0

12 0

0 8

0 7

37 67 16 0

129 Hours of calm in Hours of missing Hours of missing this stability class:

wind measurements in this stability measurements in 0

stabili ty class:

0 all stability classes:

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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, 2006 Limerick Nuclear Station Period of Record: July -

September 2006 Stability Class - Neutral 266Ft-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

6 14 14 0

0 0

34 NNE 2

18 13 0

0 0

33 NE 8

24 18 0

0 0

50 ENE 8

14 27 2

1 0

52 E

2 4

14 4

0 0

24 ESE 5

2 6

0 0

0 13 SE 6

5 6

0 2

0 19 SSE 5

10 10 4

0 0

29 S

10 14 17 6

0 0

47 SSW 7

14 28 8

0 0

57 SW 6

12 20 8

0 0

46 WSW 6

12 26 5

1 0

50 W

13 17 19 7

0 0

56 WNW 6

21 38 13 0

0 78 NW 4

14 30 7

0 0

55 NNW 2

9 27 1

0 0

39 Variable 0

0 0

Total 96 204 313 65 4

0 682 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

1 Hours of missing stability measurements in all stability classes:

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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, 2006 Limerick Nuclear Station Period of Record: July -

September 2006 Stability Class -

Slightly Stable

- 266Ft-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 7

9 5

9 11 5

5 5

9 4

6 7

6 11 1

8.

0 7

12 14 10 11 9

9 13 28 22 27 20 32 27 12 25 0

8-12 13-18 19-24

> 24 7

2 0

0 12 0

0 0

13 4

2 0

9 2

4 0

10 3

0 0

5 2

0 0

8 0

2 0

8 3

0 0

54 4

0 0

37 11 0

0 6

1 0

0 19 0

0 0

23 4

1 0

35 2

0 0

8 1

0 0

5 1

0 0

Total 23 33 38 34 35 21 24 29 95 74 40 46 66 75 22 39 0

Total 108 278 259 40 9

0 694 12 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

Hours of missing stability measurements in all stability classes:

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LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Period of Record: July -

September 2006 Stability Class -

Moderately Stable 266Ft-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 Total 1-3 1

2 4

5 1

2 6

4-7 8-12 13-18 19-24

> 24 Total 9

6 2

3 7

1 2

4 6

9 6

0 3

0 0

2 1

1 5

6 6

2 2

2 6

5 7

0 0

0 1

0 0

1 0

0 0

0 2

0 0

6 8

0 10 0

0 4

9 9

11 0

10 0

11 0

18 0

21 0

15 0

22 0

44 0

102 0

39 0

26 8

25 10 15 54 33 9

26 8

14 4

4 0

79 0

0 0

0 90 185 0

356 Hours of calm in Hours of missing Hours of missing this stability class:

wind measurements in this stability measurements in 0

stability class:

15 all stability classes:

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LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Period of Record: July -

September 2006 Stability Class -

Extremely Stable 266Ft-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

1-3 0

3 1

1 2

0 3

6 4

4-7 8-12 13-18 19-24

> 24 Total 3

1 2

0 0

1 1

2 II WNW 2

38 16 NW NNW Variable Total 4

2 0

6 2

0 1

0 0

1 0

0 0

0 17 0

56 0

11 0

0 5

0 35 69 21 0

126 Hours of calm in Hours of missing Hours of missing this stability class:

wind measurements in this stability measurements in 0

stability class:

8 all stability classes:

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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, 2006 Limerick Nuclear Station Period of Record: October -

December2006 Stability Class -

Extremely Unstable 266Ft-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 Total 1-3 4-7 8-12 13-18 19-24

> 24 Total 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:

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LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Period of Record: October -

December2006 Class -

Moderately Unstable 266Ft-26Ft Stability Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction N

NNE NE 1-3 0

0 0

0 1

0 0

4-7 8-12 13-18 19-24

> 24 Total E

ESE SE SSE S

SSW SW 0

0 0

0 WSW W

WNW NW NNW Variable 0

0 0

0 Total 1

4 5

0 0

0 10 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:

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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, 2006 Limerick Nuclear Station Stability Wind Directior Period of Record: October Class - Slightly Unstable Winds Measured at Wind Speed 1-3 4-7 8-12 December2006 266Ft-26Ft Delta-T (F) 30 Feet (in mph) 13-18 19-24

> 24 Total N

0 NNE 0

NE 0

ENE 0

E 0

ESE 0

SE 1

SSE 0

S 0

SSW 0

SW.

0 WSW 0

W 0

WNW 0

NW 0

NNW 0

Variable 0

0 1

0 0

1 0

2 7

3 3

7 0

1 0

0 0

1 0

0 0

0 3

2 0

2 6

5 3

0 0

1 1

0 0

0 2

0 0

Total 1

26 22 0

51 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:

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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, 2006 Limerick Nuclear Station Period of Record: October December2006 Stability Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Class Neutral 266 Winds Measured at 30 Feet Wind Speed (in mph)

Ft-26Ft Delta-T (F) 1-3 4-7 8-12 13-18 19-24

> 24 Total 7

13 11 6

5 8

3 3

10 9

8 9

13 9

7 1

0 11 15 13 22 22 13 5

7 19 22 9

12 25 46 41 10 0

12 26 16 1

28 4

2 0

8 11 0

4 18 84 107 21 0

342 1

0 0

0 1

0 2

0 0

0 10 15 68 0

0 0

0 1

0 0

1 13 0

0 31 54 40 29 55 25 11 10 40 42 17 25 66 155 236 32 0

Total 122 292 97 15 0

868 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:

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LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Stability Period of Record: October Class - Slightly Stable Winds Measured at December2006 266Ft-26Ft Delta-T (F) 30 Feet Wind Speed (in mph)

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

> 24 Total N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW 6

7 2

9 19

15 16 13 18 22 7

4 8

18 12 9

8 6

0 0

1 2

3 4

0 0

0 3

0 2

0 5

13 5

19 14 26 4

9 0

15 0

43 0

36 0

44 0

38 0

24 0

20 0

34 0

53 0

59 0

35 0

42 0

101 0

121 0

59 0

23 20 27 10 29 26 6

0 5

9 2

0 W

WNW NW NNW Variable Total 30 62 6

34 67 18 12 30 17 3

1 0

0 0

16 0

1 0

0 0

6 12 0

253 7

0 353 4

0 119 0

0 0

747 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:

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LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Stability Period of Record: October Class - Moderately Stable Winds Measured at December2006 266Ft-26Ft 30 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE 1-3 5

6 6

3 4-7 8-12 13-18 19-24

> 24 Total 0

2 0

1 0

0 0

0 3

1 1

0 0

0 5

8 6

7 SE 0

6 3

0 5

9 9

SSE 5

S 6

SSW SW WSW 8

9 W

WNW NW NNW Variable Total 31 32 16 5

0 160 7

7 1

0 0

23 0

0 2

0 0

0 2

0 0

0 10 0

16 0

38 0

41 0

17 0

5 0

0 0

185 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:

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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, 2006 Limerick Nuclear Station Stability Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Period of Record: October Class -

Extremely Stable Winds Measured at Wind Speed 1-3 4-7 8-12 December2006 266Ft-26Ft Delta-T (F) 30 Feet (in mph) 13-18 19-24

> 24 Total 2

1 0

1 3

0 1

2 0

3 14 30 23 6

0 0

0 0.

0 0

0 2

1 0

1 3

0 1

2 0

3 14 30 23 6

0 Total 87 0

0 0

0, 0

87 0

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

Hours of missing stability measurements in all stability classes:

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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, 2006 Limerick Nuclear Station Period of Record: October -

December2006 Stability Class - Extremely Unstable 266Ft-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

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

2 Page 82

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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, 2006 Stability Wind Directior Limerick Nuclear Station Period of Record: October -

December2006 Class - Moderately Unstable 266Ft-26Ft Delta-T (F)

Winds Measured at 17.5 Feet Wind Speed (in mph) 1-3 4-7 8-12 13-18 19-24

> 24 Total N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 0

0 0

1 1

3 0

0 0

5 0

10 Hours of calm in this stability class:

Hours of missing wind measurements in this Hours of missing stability measurement~s in 0

stability class:

all stability cl 0

asses:

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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, 2006 Limerick Nuclear Station Period of Record: October -

December2006 Class -

Slightly Unstable 266Ft-26Ft Winds Measured at 175 Feet Stability 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 0

1.

1 0

0 0

0 1

0 5

1 4

0 0

0 8-12 13-18 19-24

> 24 1

0 0

0 2

1 0

0 5

1 2

0 1

1 0

0 1

2 1

0 4

6 0

2 4

3 0

0 0

0 Total 1

1 1

0 0

2 3

13 3

8 12 7

0 0

0 Total 1

13 18 14 3

2 51 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:

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LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Stability Period of Record: October -

December2006 Class -

Neutral 266Ft-26Ft Winds Measured at 175 Feet Delta-T (F)

Wind Direction Wind Speed (in mph) 1-3 4-7 8-12 13-18 19-24

> 24 Total N

NNE NE ENE E

ESE SE SSE S

SSW 3

3 11 0

16 5

7 28 16 6

21 8

14 7

3 15 27 0

7 3

6 14 5

0 5

8 1

0 5

8 3

4 4

0 0

3 0

1 4

0 5

8 0

24 0

54 0

43 0

29 0

50 0

28 0

23 0

10 0

44 2

54 0

20 0

29 5

97 6

201 8

128 0

45 6

14 18 5

13 20 10 SW 7

4 9

8 3

9 1

3 WSW W

6 16 33

-29 WNW NW NNW Variable Total 4

14 53 96 28 0

11 40 41 28 2

11 26 0

0 0

323 6

0 231 0

0 0

0 72 155 77 21 879 Hours of calm in Hours of missing Hours of missing this stability class:

0 wind measurements in this stability class:

2 stability measurements in all stability classes:

2 Page 85

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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, 2006 Limerick Nuclear Station Period of Record: October -

December2006 Stability Wind Class -

Slightly Stable Winds Measured at 266Ft-26Ft Delta-T (F) 175 Feet Wind Speed (in mph)

Direction 1-3 4-7 8-12 13-18 19-24

> 24 N

2 2

10 1

0 0

NNE 1

5 20 7

0 0

NE 4

10 16 8

0 0

ENE 3

16 12 1

0 0

E 4

14 20 10 0

0 ESE 4

8 15 12 0

0 SE 3

5 5

1 0

0 SSE 1

10 14 5

4 5

S 3

13 24 10 4

2 SSW 4

22 26 16 1

2 SW 5

15 13 2

0 0

WSW 7

19 15 2

7 3

W 2

22 50 17 0

3 WNW 8

19 80 23 1

0 NW 2

15 24 9

0 0

NNW 1

7 11 2

0 0

Variable 0

0 0

0 Total 15 33 38 32 48 39 14 39 56 71 35 53 94 131 50 21 0

Total 54 202 355 126 17 15 769 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 10 asses:

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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, 2006 Limerick Nuclear Station Period of Record: October -

December2006 Class - Moderately Stable 266Ft-26Ft Delta-T (F)

Stability Winds Measured at 175 Feet Win Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable 1-3 4-7 1

1 4

6 1

4 3

2 1

2 4

4 3

7 5

1 0

4 3

2 5

3 0

2 4

6 3

15 16 24 9

5 0

d Speed (in mph) 8-12 13-18 2

0 2

0 0

0 1

0 3

0 0

0 3

1 7

0 7

0 18 1

22 3

1 3

1 0

0 0

19-24 0

0 0

> 24 0

0 0

Total 7

6 6

12 7

4 5

6 11 13 26 22 38 56 18 7

0 Total 49 112 74 9

0 0

244 Hours of calm in Hours of missing this stability class:

0 wind measurements in this stability class:

19 Hours of missing stability measurements in all stability classes:

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LIMERICK GENERATING STATION - UNITS 1 & 2 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, 2006 Limerick Nuclear Station Stability Period of Record: October -

December2006 Class -

Extremely Stable 266Ft-26Ft Winds Measured at 175 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

1-3 7

6 1

0 3

4 2

2 1

4 4-7 3

4 0

0 2

0 0

3 2

9 8-12 13-18 19-24

> 24 Total 0

0 0

0 1

0 0

0 1

2 2

3 0

0 0

9 0

10 0

0 0

1 0

6 4

2 5

3 SSW SW WSW W

WNW NW NNW Variable Total 5

5 8

16 3

23 9

33 11 15 0

0 0

13 0

11 0

26 0

28 0

45 0

26 7

0 2

0 0

0 9

0 73 117 0

199 Hours of calm in Hours of missing Hours of missing this stability class:

0 wind measurements in this stabili ty class:

17 stability measurements in all stability classes:

2 Page 88

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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 Classes for the Limerick Generating Station, January -

December, 2006 Limerick Nuclear Station 30 ft.

Wind Speed and Direction January-December, 2006 l7lFt-26Ft Delta-T (F)

Number of Observations =

7803 Values are Percent Occurrence SPEED WIND DIRECTION CLASSES STABILITY CLASSES-----------

CLASS N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW TOTAL EU MU SU N

SS MS ES TOTAL 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 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.18 0.47 0.22 0.06 0.00 0.00 0.06 1.03 0.76 0.00 0.00 0.00 0.00 0.00 0.50 0.27 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 0.00 0.00 0.00 0.00 0.23 0.62 0.24 0.04 0.00 0.00 0.01 0.77 1.17 0.05 0.00 0.00 0.00 0.03 0.18 0.51 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 0.29 0.88 0.24 0.01 0.00 0.00 0.00 0.65 0.87 0.00 0.00 0.00 0.00 0.00 0.19 0.29 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.19 0.88 0.22 0.05 0.00 0.00 0.01 1.27 1.04 0.03 0.00 0.00 0.00 0.00 0.40 0.28 0.00 0.00 0.00 0.00 0.00 0.00 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 0.32 0.73 0.23 0.01 0.00 0.00 0.00 0.76 1.23 0.04 0.00 0.00 0.00 0.00 0.95 0.86 0.00 0.00 0.00 0.00 0.00 0.22 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 0.22 0.41 0.09 0.01 0.00 0.00 0.00 0.42 0.67 0.04 0.00 0.00 0.00 0.00 0.15 0.18 0.00 0.00 0.00 0.00 0.00 0.10 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 0.27 0.45 0.10 0.01 0.00 0.00 0.01 0.41 0.63 0.08 0.00 0.00 0.00 0.00 0.12 0.19 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 0.00 0.00 0.00 0.00 0.00 0.00 0.21 0.59 0.06 0.01 0.00 0.00 0.00 0.27 1.29 0.01 0.00 0.00 0.00 0.01 0.22 0.28 0.00 0.00 0.00 0.00 0.00 0.00 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 0.37 0.91 0.14 0.00 0.00 0.01 0.05 0.83 1.90 0.09 0.00 0.00 0.00 0.03 0.37 0.50 0.00 0.00 0.00 0.00 0.00 0.01 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 0.38 1.09 0.29 0.06 0.01 0.08 0.24 1.32 1.44 0.08 0.00 0.00 0.00 0.12 0.32 0.29 0.00 0.00 0.00 0.00 0.00 0.04 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.47 1.72 0.31 0.01 0.00 0.08 0.24 0.99 0.55 0.00 0.00 0.00 0.01 0.03 0.13 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.03 0.63 1.87 0.51 0.03 0.03 0.06 0.24 1.55 0.78 0.01 0.00 0.00 0.00 0.03 0.44 0.24 0.00 0.00 0.00 0.00 0.00 0.08 0.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.58 2.20 1.17 0.18 0.01 0.08 0.12 1.65 1.91 0.12 0.00 0.00 0.00 0.03 0.92 0.33 0.00 0.00 0.00 0.00 0.00 0.23 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 0.56 2.61 1.49 0.54 0.00 0.05 0.10 2.15 2.97 0.21 0.00 0.00 0.00 0.01 2.40 0.88 0.00 0.00 0.00 0.00 0.00 1.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.33 1.31 0.91 0.24 0.00 0.00 0.03 2.59 2.29 0.08 0.00 0.00 0.00 0.01 5.27 1.04 0.00 0.00 0.00 0.00 0.03 3.34 0.22 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.12 0.62 0.36 0.12 0.00 0.00 0.03 1.22 0.97 0.01 0.00 0.00 0.00 0.00 1.44 0.36 0.00 0.00 0.00 0.00 0.00 0.21 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.06 5.36 17.37 6.59 1.40 0.05 0.36 1.15 17.88 20.47 0.83 0.00 0.00 0.01 0.28 13.98 6.55 0.00 0.00 0.00 0.00 0.03 5.32 0.92 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.01 0.36 0.01 0.00 0.00 0.06 1.15 0.28 0.03 0.00 5.36 17.88 13.98 5.32 0.00 17.37 20.47 6.55 0.92 0.00 6.59 0.83 0.00 0.00 0.00 1.40 0.00 0.00 0.00 0.00 30.78 40.74 20.83 6.27 Page 89

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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, 2006 Limerick Nuclear Station 30 ft.

Wind Speed and Direction January-December, 2006 l7lFt-26Ft Delta-T (F)

SPEED WIND DIRECTION CLASSES-STABILITY CLASSES-----------

EU MU SU N

SS MS ES TOTAL CLASS N

NNE NE ENE E

ESE SE SSE S

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 0.00 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 0.08 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 0.00 0.03 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 0.00 0.21 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

.0.00 0.86 0.00 0.00 0.00 0.00 0.00 0.00 0.13 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 0.00 0.00 0.00 0.00 1.11 0.14 0.00 0.00 0.00 0.00 0.00 0.13 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.11 0.13 0.14 0.00 0.00 0.00 0.00 0.00 1.26 0.13 0.05 0.38 1.53 43.78 45.44 7.42 1.40 100.00 TOT 3.59 3.84 3.47 4.43 5.41 2.31 2.32 3.10 5.34 5.84 4.61 6.57 9.69 15.31 18.67 5.47 100.00 Wind Direction by Stability N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW TOTAL 0.00 0.00 0.06 1.74 1.50 0.22 0.06 0.00 0.00 0.04 1.18 2.29 0.29 0.04 0.00 0.00 0.00 1.14 2.08 0.24 0.01 0.00 0.00 0.01 1.86 2.27 0.24 0.05 0.00 0.00 0.00 2.24 2.88 0.27 0.01 0.00 0.00 0.00 0.90 1.27 0.13 0.01 0.00 0.00 0.01 0.79 1.32 0.18 0.01 0.00 0.00 0.01 0.69 2.31 0.08 0.01 0.00 0.01 0.08 1.59 3.43 0.23 0.00 0.01 0.08 0.36 2.06 2.90 0.37 0.06 0.00 0.09 0.29 1.59 2.32 0.31 0.01 0.03 0.08 0.29 2.69 2.93 0.53 0.03 0.01 0.08 0.15 3.40 4.59 1.28 0.18 0.00 0.05 0.12 6.37 6.55 1.69 0.54 0.00 0.00 0.06 12.52 4.86 0.99 0.24 0.00 0.00 0.03 3.01 1.95 0.37 0.12 0.05 0.38 1.53 43.78 45.44 7.42 1.40 Wind Direction by Wind Speed

-STABILITY CLASSES-Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable

-WIND SPEED CLASSES-CALM 3.5 mph 3.6 -

7.5 mph 7.6 -

12.5 mph 12.6 -

18.5 mph 18.6 -

24.5 mph

> 24.5 mph N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW TOTAL 0.00 0.94 1.85 0.77 0.04 0.00 0.00 0.00 1.13 2.00 0.72 0.00 0.00 0.00 0.00 1.44 1.53 0.49 0.03 0.00 0.00 0.00 1.35 2.35 0.68 0.06 0.00 0.00 0.00 1.29 2.02 1.81 0.28 0.00 0.00 0.00 0.73 1.13 0.33 0.12 0.00 0.00 0.00 0.83 1.13 0.31 0.05 0.00 0.00 0.00 0.87 1.58 0.51 0.06 0.08 0.00 0.00 1.42 2.88 0.90 0.13 0.01 0.00 0.00 1.83 3.17 0.73 0.09 0.03 0.00 0.00 2.54 1.86 0.19 0.03 0.00 0.00 0.00 3.08 2.68 0.70 0.12 0.00 0.00 0.00 4.14 3.88 1.28 0.37 0.01 0.00 0.00 5.20 5.49 3.29 1.10 0.23 0.00 0.00 2.79 4.99 6.32 3.59 0.86 0.13 0.00 1.20 2.23 1.79 0.21 0.04 0.00 0.00 30.78 40.74 20.83 6.27 1.26 0.13 Page 90

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Table D -

10 Wind Speed Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January-December, 2006 Limerick Nuclear Station January-December, 2006 175 ft.

Wind Speed and Direction l7lFt-26Ft Delta-T (F)

Number of Observations =

8535 Values are Percent Occurrence SPEED WIND DIRECTION CLASSES STABILITY CLASSES-----------

CLASS N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW TOTAL EU MU SU N

SS MS ES EU MU SU N

Ss MS ES 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 0.00 0.12 0.18 0.09 0.07 0.00 0.00 0.05 0.60 0.36 0.22 0.07 0.00 0.00 0.00 0.82 0.74 0.05 0.00 0.00 0.00 0.00 0.15 0.16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.08 0.23 0.11 0.09 0.00 0.00 0.01 0.62 0.47 0.15 0.11 0.00 0.00 0.02 0.45 1.11 0.05 0.01 0.00 0.00 0.00 0.11 0.32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.27 0.30 0.14 0.02 0.00 0.00 0.00 0.49 0.66 0.07 0.04 0.00 0.00 0.00 0.37 0.79 0.01 0.00 0.00 0.00 0.00 0.07 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.16 0.46 0.15 0.04 0.00 0.00 0.00 0.52 0.71 0.16 0.04 0.00 0.00 0.00 0.81 0.64 0.01 0.00 0.00 0.00 0.00 0.11 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 0.12 0.32 0.08 0.09 0.00 0.00 0.01 0.42 0.66 0.16 0.02 0.00 0.00 0.00 0.71 1.00 0.07 0.00 0.00 0.00 0.00 0.40 0.59 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 0.23 0.13 0.05 0.00 0.00 0.00 0.26 0.49 0.05 0.02 0.00 0.00 0.00 0.30 0.57 0.02 0.00 0.00 0.00 0.00 0.20 0.29 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.19 0.28 0.19 0.06 0.00 0.00 0.00 0.34 0.46 0.08 0.02 0.00 0.00 0.00 0.15 0.48 0.01 0.00 0.00 0.00 0.00 0.05 0.11 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.22 0.06 0.05 0.00 0.00 0.01 0.30 0.61 0.20 0.06 0.00 0.00 0.01 0.13 0.82 0.11 0.00 0.00 0.00 0.00 0.15 0.37 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.21 0.28 0.11 0.05 0.00 0.00 0.00 0.61 1.02 0.22 0.07 0.00 0.02 0.08 0.66 1.71 0.12 0.01 0.00 0.00 0.00 0.26 0.50 0.01 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 0.20 0.18 0.16 0.06 0.00 0.01 0.08 0.52 1.16 0.32

0. 12 0.01 0.06 0.20 1.01 1.52 0.16 0.00 0.00 0.00 0.06 0.33 0.49 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.23 0.23 0.22 0.07 0.00 0.05 0.09 0.61 1.12 0.41 0.13 0.00 0.02 0.16 0.59 0.68 0.15 0.01 0.00 0.00 0.06 0.26 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 0.23 0.27 0.27 0.14 0.00 0.04 0.11 0.61 1.17 0.36 0.23 0.02 0.08 0.08 1.07 1.02 0.19 0.01 0.00 0.00 0.06 0.46 0.21 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.39 0.30 0.28 0.07 0.00 0.02 0.04 0.87 1.48 0.62 0.36 0.01 0.02 0.13 1.73 1.80 0.46 0.02 0.00 0.00 0.01 0.87 0.61 0.01 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 0.14 0.49 0.28 0.07 0.00 0.00 0.01 0.80 1.91 1.24 0.27 0.00 0.01 0.01 2.51 3.22 0.94 0.25 0.00 0.00 0.00 2.89 0.84 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.13 0.22 0.29 0.08 0.00 0.00 0.00 0.70 1.18 0.50 0.12 0.00 0.00 0.02 2.11 1.44 0.21 0.00 0.00 0.00 0.01 1.86 0.53 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.07 0.27 0.15 0.07 0.00 0.00 0.04 0.48 0.88 0.34 0.02 0.00 0.00 0.00 1.42 0.95 0.12 0.00 0.00 0.00 0.00 0.74 0.19 0.01 0.00 0.00 0.00 0.00 0.00 0.02 0.00 0.00 0.00 0.00 0.00 2.69 4.48 2.72 1.08 0.00 0.12 0.45 8.74 14.34 5.12 1.70 0.05 0.22 0.73 14.83 18.50 2.67 0.32 0.00 0.00 0.20 8.89 5.65 0.13 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.12 0.22 0.00 0.00 0.00 0.45 0.73 0.20 0.00 2.69 8.74 14.83 8.89 0.02 4.48 14.34 18.50 5.65 0.00 2.72 5.12 2.67 0.13 0.00 1.08 1.70 0.32 0.00 TOTAL 0.02 10.97 30.46 37.32 14.87 Page 91

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Table D -

10 Wind Speed Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January -

December, 2006 Limerick Nuclear Station 175 ft.

Wind Speed and Direction January-December, 2006 l7lFt-26Ft Delta-T (F)

SPEED WIND DIRECTION CLASSES STABILITY CLASSES-----------

EU MU SU N

SS MS ES TOTAL CLASS N

NNE NE ENE E

ESE SE SSE S

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 0.01 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 0.00 0.00 0.00 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 0.00 0.00 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 0.09 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 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 0.07 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 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.01 0.13 0.00 0.00 0.00 0.00 0.00 0.00 0.04 0.00 0.00 0.00 0.00 0.01 0.08 0.07 0.00 0.00 0.00 0.00 0.00 0.01 0.08 0.00 0.00 0.00 0.01 0.00 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.32 0.16 0.00 0.00 0.00 0.00 0.00 0.04 0.04 0.00 0.00 0.00 0.00 0.00 0.29 0.12 0.00 0.00 0.00 0.00 0.00 0.15 0.04 0.00 0.00 0.00 0.00 0.00 1.46 0.12 0.00 0.00 0.00 0.00 0.00 0.47 0.02 0.00 0.00 0.00 0.00 0.01 1.21 0.05 0.00 0.00 0.00 0.00 0.00 0.59 0.00 0.00 0.00 0.00 0.00 0.00 0.15 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.00 0.00 0.00 0.00 0.01 0.02 3.78 0.90 0.00 0.00 0.00 0.00 0.00 1.34 0.30 0.00 0.00 0.00 0.00 0.01 0.00 0.02 0.00 3.78 1.34 0.90 0.30 0.00 0.00 0.00 0.00 4.72 1.64 TOT 3.69 3.94 3.49 3.93 4.79 2.80 2.51 3.37 6.12 6.92 5.30 7.19 10.71 18.02 11.27 5.95 100.00 0.05 0.35 1.39 40.28 44.19 10.64 3.09 100.00 Wind Direction by Stability N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW TOTAL 0.00 0.00 0.05 1.70 1.44 0.36 0.14 0.00 0.00 0.04 1.25 2.13 0.30 0.21 0.00 0.00 0.00 1.21 2.00 0.22 0.06 0.00 0.00 0.00 1.59 1.93 0.33 0.07 0.00 0.00 0.01 1.75 2.60 0.32 0.12 0.00 0.00 0.00 0.91 1.59 0.22 0.07 0.00 0.00 0.00 0.75 1.39 0.28 0.08 0.00 0.00 0.02 0.70 2.18 0.36 0.11 0.00 0.02 0.08 1.75 3.68 0.46 0.13 0.01 0.07 0.35 2.14 3.51 0.66 0.18 0.00 0.08 0.32 1.72 2.18 0.79 0.21 0.02 0.12 0.25 2.72 2.87 0.83 0.39 0.01 0.05 0.18 4-.30 4.35 1.37 0.46 0.00 0.01 0.02 8.27 6.62 2.51 0.59 0.00 0.00 0.05 6.60 3.42 1.01 0.20 0.00 0.00 0.04 2.92 2.28 0.62 0.09 0.05 0.35 1.39 40.28 44.19 10.64 3.09 Wind Direction by Wind Speed N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW TOTAL

-STABILITY CLASSES-Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable

-WIND SPEED CLASSES-CALM 3.5 mph 3.6 -

7.5 mph 7.6 -

12.5 mph 12.6 -

18.5 mph 18.6 -

24.5 mph

> 24.5 mph 0.00 0.46 1.30 1.61 0.32 0.01 0.00 0.00 0.52 1.36 1.64 0.42 0.00 0.00 0.00 0.74 1.25 1.17 0.30 0.02 0.00 0.00 0.81 1.43 1.46 0.16 0.06 0.00 0.00 0.61 1.28 1.78 0.98 0.14 0.00 0.00 0.47 0.82 0.90 0.52 0.09 0.00 0.00 0.71 0.90 0.64 0.15 0.09 0.00 0.00 0.42 1.18 1.07 0.53 0.08 0.09 0.00 0.64 1.92 2.60 0.77 0.14 0.04 0.01 0.60 2.20 2.96 0.89 0.16 0.09 0.00 0.76 2.41 1.62 0.46 0.02 0.02 0.00 0.91 2.52 2.47 0.74 0.48 0.07 0.00 1.04 3.39 4.18 1.50 0.41 0.19 0.01 0.98 4.23 6.94 3.78 1.58 0.49 0.00 0.73 2.51 3.78 2.40 1.27 0.59 0.00 0.56 1.76 2.48 0.94 0.15 0.06 0.02 10.97 30.46 37.32 14.87 4.72 1.64 Page 92

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Table D - 11 Annual X/Q, X/Q depleted and D/Q values for the North Stack, Limerick Generating Station, 2006 Limerick Generating Station X/Q, X/Q depleted and D/Q values North Stack -

Location Flow = 251200 cfm Direction Range (m)

Stack ID X/Q (s/mA3)

Undepleted No Decay X/Q (s/mA2)

Depleted 8.05d Decay D/Q (1/mA2)

Site Boundary Inhalation Vegetation Meat Cow Nat'l Guard Stat Site Boundary Inhalation Vegetation Meat Site Boundary Meat Inhalation Vegetation Site Boundary Inhalation Vegetation Meat Site Boundary Inhalation Vegetation Meat Site Boundary Inhalation Info Center Cow Goat Vegetation Meat Site Boundary Inhalation Vegetation Meat Site Boundary Inhalation Vegetation Meat Cow RR Tracks 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 2.36E-07 2.09E-07 7.57E-08 6.54E-08 4.03E-08 3.02E-07 2.45E-07 2.40E-07 2.40E-07 9.97E-08 1.17E-07 7.63E-08 6.25E-08 4.33E-08 2.23E-07 1.72E-07 6.84E-08 6.37E-08 4.05E-07 2.95E-07 1.42E-07 1.34E-07 8.23E-07 7.62E-07 6.69E-07 2.71 E-07 2.71 E-07 2.47E-07 1.35E-07 1.45E-06 5.18E-07 4.58E-07 1.01 E-07 2.39E-07 1.30E-07 1.06E-07 3.48E-08 3.34E-08 8.27E-07 2.14E-07 1.89E-07 6.78E-08 5.93E-08 3.70E-08 2.80E-07 2.26E-07 2.21 E-07 2.21 E-07 8.91 E-08 1.08E-07 6.97E-08 5.68E-08 4.OOE-08 2.05E-07 1.57E-07 6.28E-08 5.94E-08 3.72E-07 2.68E-07 1.26E-07 1.19E-07 7.55E-07 6.97E-07 6.08E-07 2.40E-07 2.40E-07 2.19E-07 1.22E-07 1.33E-06 4.58E-07 4.04E-07 8.72E-08 2.16E-07 1.15E-07 9.40E-08 3.12E-08 2.99E-08 7.92E-07 2.29E-09 2.01 E-09 5.01 E-1 0 3.33E-1 0 9.48E-1 1 3.69E-09 3.01 E-09 2.95E-09 2.95E-09 1.20E-09 1.71 E-09 1.16E-09 9.56E-1 0 4.07E-10 2.90E-09 2.24E-09 5.02E-10 3.39E-10 4.81 E-09 3.44E-09 1.49E-09 1.35E-09 1.OOE-08 9.23E-09 8.01 E-09 2.88E-09 2.88E-09 2.53E-09 6.95E-1 0 2.11E-08 6.63E-09 5.70E-09 5.78E-1 0 2.75E-09 1.41 E-09 1.08E-09 1.42E-10 1.31 E-10 7.96E-09 Page 93

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Table D - 11 Annual X/Q, X/Q depleted and D/Q values for the North Stack, Limerick Generating Station, 2006 Limerick Generating Station X/Q, X/Q depleted and D/Q values Stack ID North Stack - Flow = 251200 cfm Location Direction Range (m)

X/Q (s/mA3)

Undepleted No Decay X/Q (s/mA2)

Depleted 8.05d Decay D/Q (1/mA2) 4 4

4.

4

4.

Site Boundary Inhalation Vegetation Meat Cow RR Tracks Site Boundary Meat Inhalation Vegetation Cow RR Tracks Site Boundary Inhalation Vegetation Meat Cow Site Boundary Inhalation Vegetation Meat Cow RR Tracks Site Boundary Inhalation Vegetation Meat RR Tracks Site Boundary Inhalation Vegetation RR Tracks Fricks Lock RR Tracks Site Boundary Inhalation Vegetation Meat Site Boundary Inhalation Vegetation Meat S

S S

SSW SSW SSW SSW SSW SSW SW SW SW SW SW SW WSW WSW WSW WSW WSW W

W W

WNW WNW WNW WNW WSW WSW 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 854 1287 1287 2134 4505 225 854 965 3540 4084 345 793 1126 1126 345 450 450 762 2092 2574 6660 884 1448 1931 6325 1.93E-07 9.53E-08 6.06E-08 4.30E-08 3.77E-08 1.49E-06 1.99E-07 8.65E-08 7.58E-08 5.61 E-08 4.79E-08 1.09E-06 1.20E-07 1.07E-07 1.07E-07 4.OOE-08 3.30E-08 1.81E-07 1.05E-07 1.05E-07 6.43E-08 4.45E-08 2.61 E-06 3.01E-07 2.55E-07 6.42E-08 5.77E-08 4.09E-07 1.1OE-07 6.80E-08 6.80E-08 7.24E-07 4.56E-07 2.47E-07 1.1OE-07 3.34E-08 2.97E-08 1.89E-08 1.36E-07 7.11 E-08 5.34E-08 2.76E-08 1.77E-07 8.53E-08 5.39E-08 3.87E-08 3.40E-08 1.44E-06 1.83E-07 7.71 E-08 6.75E-08 5.OOE-08 4.30E-08 1.05E-06 1.09E-07 9.64E-08 9.64E-08 3.63E-08 3.06E-08 1.65E-07 9.38E-08 9.38E-08 5.76E-08 4.09E-08 2.52E-06 2.74E-07 2.31 E-07 5.72E-08 5.16E-08 3.90E-07 1.OOE-07 6.1 OE-08 6.1 OE-08 6.90E-07 4.30E-07 2.33E-07 1.01 E-07 2.97E-08 2.67E-08 1.74E-08 1.23E-07 6.31 E-08 4.73E-08 2.54E-08 2.12E-09 1.04E-09 6.18E-11 3.37E-1C 2.54E-1C 1.13E-08 2.03E-09 8.69E-10 7.46E-10 4.68E-1 0 3.28E-1 0 8.28E-09 1.16E-09 1.03E-09 1.03E-09 2.85E-1 0 1.40E-10 1.85E-09 1.08E-09 1.08E-09 5.73E-10 2.07E-10 2.42E-08 3.48E-09 2.90E-09 4.24E-10 3.40E-10 3.83E-09 1.15E-09 7.OOE-1 0 7.OOE-10 6.69E-09 4.62E-09 2.20E-09 1.02E-09 2.73E-110 2.07E-10 5.23E-1 1 1.29E-09 6.41 E-1 0 4.24E-1 0 7.12E-11 Page 94

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EXELON GENERATION COMPANY, LLC Table D - 12 Annual X/Q, X/Q depleted and D/Q values for the South Stack, Limerick Generating Station, 2006 Limerick Generating Station X/Q, X/Q depleted and D/Q values South Stack - Flow = 177200 cfm X/Q (s/mA3)

X/Q (s/mA2)

Stack ID Location Direction Range (m)

Undepleted Depleted No Decay 8.05d Decay D/Q (1/mA2)

S Site Boundary N

884 9.38E-08 8.58E-08 1.09E-09 S

Inhalation N

965 8.41 E-08 7.65E-08 9.82E-10 S

Vegetation N

2574 4.63E-08 4.31 E-08 3.33E-10 S

Meat N

3414 4.68E-08 4.41E-08 2.37E-10 S

Cow N

7562 3.55E-08 3.38E-08 7.44E-1 1 S

Nat'l Guard Stat NNE 682 1.35E-07 1.26E-07 2.15E-09 S

Site Boundary NNE 793 1.12E-07 1.04E-07 1.83E-09 S

Inhalation NNE 805 1.1OE-07 1.02E-07 1.80E-09 S

Vegetation NNE 805 1.10E-07 1.02E-07 1.80E-09 S

Meat NNE 1585 5.21E-08 4.76E-08 8.77E-10 S

Site Boundary NE 793 6.02E-08 5.66E-08 1.23E-09 S

Meat NE 1097 4.18E-08 3.89E-08 8.98E-10 S

Inhalation NE 1287 3.54E-08 3.28E-08 7.67E-10 S

Vegetation NE 2414 3.15E-08 2.98E-08 3.51E-10 S

Site Boundary ENE 793 9.87E-08 9.18E-08 1.75E-09 S

Inhalation ENE 965 7.96E-08 7.37E-08 1.43E-09 S

Vegetation ENE 2896 5.04E-08 4.78E-08 4.08E-10 S

Meat ENE 3871 5.20E-08 4.98E-08 2.90E-10 S

Site Boundary E

762 1.66E-07 1.53E-07 2.50E-09 S

Inhalation E

965 1.26E-07 1.15E-07 1.91E-09 S

Vegetation E

1770 7.48E-08 6.85E-08 1.01 E-09 S

Meat E

1890 7.33E-08 6.73E-08 9.34E-10 S

Site Boundary ESE 762 3.22E-07 2.96E-07 4.72E-09 S

Inhalation ESE 805 3.OOE-07 2.75E-07 4.40E-09 S

Info Center ESE 884 2.66E-07 2.43E-07 3.90E-09 S

Cow ESE 1770 1.35E-07 1.23E-07 1.82E-09 S

Goat ESE 1770 1.35E-07 1.23E-07 1.82E-09 S

Vegetation ESE 1931 1.30E-07 1.19E-07 1.64E-09 S

Meat ESE 4511 1.08E-07 1.02E-07 5.59E-10 S

Site Boundary SE 762 5.88E-07 5.40E-07 1.02E-08 S

Inhalation SE 1609 2.55E-07 2.31E-07 4.03E-09 S

Vegetation SE 1770 2.36E-07 2.14E-07 3.57E-09 S

Meat SE 7241 8.80E-08 8.05E-08 4.98E-10 S

Site Boundary SSE 1006 9.06E-08 8.24E-08 1.28E-09 S

Inhalation SSE 1609 5.87E-08 5.35E-08 8.38E-10 S

Vegetation SSE 1931 5.37E-08 4.93E-08 6.84E-10 S

Meat SSE 7224 3.06E-08 2.86E-08 1.22E-10 S

Cow SSE 7562 2.95E-08 2.76E-08 1.13E-10 Page 95

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Table D - 12 Annual X/Q, X/Q depleted and D/Q values for the South Stack, Limerick Generating Station, 2006 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 X/Q (s/mA2)

Depleted 8.05d Decay No Decay D/Q (1/m^2)

RR Tracks Site Boundary Inhalation Vegetation Meat Cow RR Tracks Site Boundary Meat Inhalation Vegetation Cow RR Tracks Site Boundary Inhalation Vegetation Meat Cow RR Tracks Fricks Lock Site Boundary Inhalation Vegetation Meat Cow RR Tracks Site Boundary Inhalation Vegetation Meat RR Tracks Site Boundary Inhalation Vegetation RR Tracks Site Boundary Inhalation Vegetation Meat Site Boundary Inhalation Vegetation Meat 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

WNW WNW WNW WNW NW NW NW NW NW NNW NNW NNW NNW 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 1126 1126 450 762 2092 2574 6660 884 1448 1931 6325 2.99E-07 7.30E-08 4.OOE-08 3.15E-08 2.94E-08 2.82E-08 5.43E-07 7.63E-08 3.75E-08 3.47E-08 3.17E-08 3.16E-08 4.05E-07 4.59E-08 4.11 E-08 4.11E-08 2.68E-08 2.73E-08 2.76E-07 1.75E-07 7.22E-08 4.53E-08 4.53E-08 3.64E-08 3.62E-08 8.94E-07 1.09E-07 9.38E-08 4.52E-08 4.31 E-08 1.57E-07 4.36E-08 2.80E-08 2.80E-08 9.51 E-08 4.28E-08 1.75E-08 1.81 E-08 1.63E-08 5.50E-08 3.1OE-08 2.70E-08 2.38E-08 2.86E-07 6.74E-08 3.63E-08 2.89E-08 2.76E-08 2.66E-08 5.24E-07 7.04E-08 3.40E-08 3.15E-08 2.93E-08 2.96E-08 3.91 E-07 4.18E-08 3.73E-08 3.73E-08 2.52E-08 2.61 E-08 2.63E-07 1.65E-07 6.61 E-08 4.1OE-08 4.1OE-08 3.37E-08 3.45E-08 8.64E-07 9.95E-08 8.55E-08 4.23E-08 4.05E-08 1.50E-07 4.OOE-08 2.54E-08 2.54E-08 8.96E-08 3.93E-08 1.61E-08 1.68E-08 1.55E-08 5.OOE-08 2.78E-08 2.45E-08 2.27E-08 2.89E-09 9.63E-10 5.98E-10 4.24E-10 2.62E-10 2.07E-10 3.94E-09 9.27E-1 0 5.22E-10 4.69E-10 3.25E-10 2.42E-10 2.94E-09 5.20E-10 4.81 E-10 4.81 E-10 2.18E-10 1.18E-10 2.61 E-09 1.93E-09 9.11E-10 6.41E-10 6.41 E-10 4.09E-10 1.73E-10 8.26E709 1.50E-09 1.30E-09 3.04E-10 2.52E-10 1.54E-09 5.47E-10 3.75E-1 0 3.75E-10 8.75E-1(0 4.46E-10 1.80E-10 1.45E-10 4.28E-11 6.11E-10 3.60E-10 2.59E-10 5.49E-1 1 Page 96

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC Appendix E Corrections to Previous Submittals Page 97

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

Page 98

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LIMERICK GENERATING STATION - UNITS 1 & 2 EXELON GENERATION COMPANY, LLC An error in Tables 1 and 8 of the 2005 Annual Radioactive Release Report in reporting activity for 1-131, gross alpha and tritium when no activity was found. The values reported were 0.00E+00 when infact they should have been reported as < LLD. This error had no impact on the doses calculated or in the total curies released from the Limerick Generating Station.

TABLE 1 GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES A.

FISSION AND ACTIVATION GASSES PERIOD 2005 Est. Total Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Erroral Error %

1. Total Release Ci 1.21E+01 1.39E+00 4.43E+00 2.09E+01 3.66E+01

2. Average Release Rate for Period uCi/sec 1.54E+00 1.76E-01 5.64E-01 2.66E+00

3. Percent of ODCM Limit 5.35E-03 1.48E-03 4.96E-03 2.45E-02

- Gamma Air Dose

- Beta Air Dose 3.03E-03 4.59E-04 1.53E-03 7.50E-03 B,

IODINES Units Qtr 1 Qtr 2 Qtr 3 Qtr4 Est. Total Error %

1. Total 131 Ci 5.41 E-04

<LLD

<LLD 9.09E-07 2.04E+01

2. Average Release Rate for Period uCi/sec 6.88E-05

<LLD

<LLD 1.16E-07

3. Percent of Limit C,

PARTICULATES Est. Total Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Error %

1. Particulates with T 1/2 > 8 days Ci 8.37E-05 4.25E-05

<LLD 8.95E-06 2.26E+01

2. Average Release Rate for Period uCi/sec 1.07E-05 5.40E-06

<LLD 1.14E-06

3. Percent of ODCM Limit

4. Gross Alpha Ci

<LLD

<LLD D,

TRITIUM Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Est. Total Error %

1. Total Release Ci

<LLD

<LLD 3.28E+00 1.57E+01

2. Averaae Release Rate for Period uCi/sec

<LLD

<LLD 4.17E-01

3. Percent of ODCM Limit E,

Iodine 131 & 133, Tritium & Particulate Units Qtr 1 Qtr 2 Qtr 3 Qtr 4

1. Percent of ODCM Limit

- Organ Dose 5.77E-01 1.79E-03 N/A 6.03E-03

ODCM Limit is for combined Iodine, tritium and particulate only, which is shown in Item E.

Page 99

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LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE:

EXELON GENERATION COMPANY, LLC TABLE 8 LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES A. FISSION AND ACTIVATION PRODUCTS PERIOD 2005 Est. Total Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Erroral Error %

1. Total release (not including tritium, Ci 1.27E-03 2.55E-04 3.55E-03 2.49E-04 2.11E+01 gasses & alpha)

2. Average diluted concentration during uCi/mI 1.22E-08 1.01 E-08 6.30E-08 5.29E-09 batch discharge for the period

3. % of ODCM Limit - Whole Body Dose*

1.46E-02 3.60E-03 2.73E-02 5.17E-03

- Organ Dose*

4.40E-03 1.40E-03 8.27E-03 1.56E-03 B.

TRITIUM

[Est. Total Units Qtr 1 Qtr 2 Qtr 3 Qtr 4[Error%

Error %

1. Total Release Ci 1.46E+01 2.69E+00 6.48E+00 5.95E+00 6.43E+00 2.Average diluted concentration during uCi/mI 1.40E-04 1.06E-04 1.15E-04 1.27E-04 b

discharge for the period

3. % of ODCM Limit - MPC 4.67E+00 3.53E+00 3.83E+00 4.23E+00 C. DISSOLVED AND ENTRAINED GASSES lEst. Total Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Errora Error %

1. Total release Ci 9.19E-04 3.61E-07 2.35E-04 2.37E-04 2.11E+01

2. Average diluted concentration during uCi/mI 8.84E-09 1.43E-11 4.17E-09 5.05E-09 batch discharge for the period of ODCM Limit - MPC 4.42E-03 7.15E-06 2.09E-03 2.53E-037 D. GROSS ALPHA RADIOACTIVITY Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Est. Total Error %

1. Total release Ci

<LLD

<LLD 9.90E-5 2.30E+01

2. Average diluted concentration during uCi/mI

<LLD

<LLD 5.89E-8 ba t ch discharge for the period Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Est. Total Error %

Volume of waste released (prior to Liters 3.55E+06 9.84E+05 2.03E+06 1.68E+06 5.OOE+00 dilution)

Volume of dilution water used during Liters 1.OOE+08 2.43E+07 5.44E+07 4.53E+07 3.56E+O0

)eriod Percent of limit includes tritium.

Page 100

ML071210611

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