ML081220902

Radioactive Effluent Release Report No. 50, January 1, 2007 Through December 31, 2007

ML081220902
Person / Time
Site:	Peach Bottom
Issue date:	04/25/2008
From:	Grimes J Exelon Generation Co, Exelon Nuclear
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML081220902 (97)

Text

PhExeln.Peach Bottom Atomic Power Station www.exeloncorp.com 1848 Lay Road Nuclear Delta, PA 17314 April 25, 2008 U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555-0001 Peach Bottom Atomic Power Station Unit Nos. 2 and 3 Independent Spent Fuel Storage Installation (ISFSI)Facility Operating License Nos. DPR-44 and DPR-56 NRC Docket Nos. 50-277 and 50-278 & ISFSI Docket 72-29

SUBJECT:

Radioactive Effluent Release Report No. 50 January 1, 2007 through December 31, 2007 Enclosed are two copies of the Radioactive Effluent Release Report No. 50, January 1, 2007, through December 31, 2007, for Peach Bottom Atomic Power Station Unit Nos. 2 and 3.This report is being submitted in compliance with IOCFR 50.36a (2) and the Technical Specifications of Operating Licenses DPR-44 and DPR-56, and to fulfill the requirements of ODCMS 3.10.2. Additionally, this report is submitted to satisfy annual effluent reporting requirements for the ISFSI required by the Offsite Dose Calculation Manual (ODCM).There were no revisions made to the ODCM for the 2007 reporting period.There are no commitments contained in this letter.If you have any questions or require additional information, please do not hesitate to contact us.Since ely, Jos ph P. Grimes, Site Vice President Peach Bottom Atomic Power Station JPG/LJL/MT/bcb Enclosures (2)ccn 08-27 cc: S. J. Collins, Administrator, Region I, US NRC G. F: Wunder, Project Manager, US NRC F. Bower, US NRC Senior Resident Inspector, PBAPS A4 _C1' PEACH BOTTOM ATOMIC POWER STATION Unit Numbers 2 and 3 Docket Numbers 50-277 and 50-278 Unit Number 1 Docket Number 50-171 PBAPS Independent Spent Fuel Storage Installation Docket Number 72-29 RADIOACTIVE EFFLUENT RELEASE REPORT NO. 50 JANUARY 1, 2007 THROUGH DECEMBER 31, 2007 Submitted to The United States Nuclear Regulatory Commission Pursuant to Facility Operating Licenses DPR-44 and DPR-56 (Page Intentionally Left Blank)

• TABLE OF CONTENTS SECTION PAGE Introduction 1 Attachment 1 Supplemental Information 3 Regulatory Limits 5 Maximum Permissible Concentrations 6 Average Energy 6 Measurements and Approximations of Total Radioactivity 6 Batch Releases 8 Average Stream Flow 9 Abnormal Releases 9 Changes to ODCM 12 Minimum Detectable Concentrations 12 Violations 13 Attachment 2 Effluent Summary 15 Gaseous Effluents

-Summation of All Releases 17 Gaseous Effluents for Elevated Release Point -Main Stack 18 Gaseous Effluents for Ground Level Release Points -19 Unit 2 and Unit 3 Roof Vents & Aux Boiler Stack Liquid Effluents

-Summation of All Releases 20 Liquid Effluents Release Points -Liquid Radwaste, RHR Leaks 21 Attachment 3 Solid Waste and Irradiated Fuel Shipments 23 Solid Waste Shipped 25 Irradiated Fuel Shipments 27 Changes to Process Control Program (PCP) 27 Attachment 4 Radiological Impact on Man 29 Radiological Impact on Man 31 Summary of Gaseous and Liquid Annual Doses 31 Liquid and Gaseous Effluent Radiation Monitors 31 Attachment 5 Meteorological Data 33 Technical Concurrences: (for accuracy of information)

Chemistry

/ Manager Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC INTRODUCTION In accordance with the Reporting Requirements of Technical Specification 5.6.3 applicable during the reporting period, this report summarizes the Effluent Release Data for Peach Bottom Atomic Power Station Units 2 and 3 for the period January 1, 2007 through December 31, 2007. The notations E and E- are used to denote positive and negative exponents to the base 10, respectively.

The release of radioactive materials during the reporting period was within the Offsite Dose Calculation Manual Specification limits.There were four unplanned releases of liquid radioactive material.

Three releases from RHR heat exchangers and one from a groundwater tritium plume.There were no gaseous or liquid radioactive releases from the Independent Spent Fuel Storage Installation, NRC Docket No. 72-29 (ISFSI).There were no changes made to RW-AA-1 00 "Process Control Program for Radioactive Waste".There were no changes made to the ODCM for the 2007 reporting period.Exelon common procedures, which provide consistent expectations and standards for Radioactive Effluents Controls Program, were used to generate this report. They are:* CY-AA-170-000, Radioactive Effluent and Environmental Monitoring Program* CY-AA-170-100, Radiological Environmental Monitoring Program* CY-AA-1 70-200, Radioactive Effluent Controls Program* CY-AA-170-300, Offsite Dose Calculation Manual Administration

• CY-AA-170-2000, Annual Radioactive Effluent Release Report* CY-AA-170-2100, Estimated Errors of Effluent Measurement

• CY-AA-170-3100, Offsite Dose Calculation Manual Revisions I Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC (Page Intentionally Left Blank)2 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Attachment 1 Supplemental Information 3

Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC (Page Intentionally Left Blank)4 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC 1. Regulatory Limits A. Noble Gases: 1. <500 mRem/Yr< 3000 mRem/Yr 2. <10<20 3. < 20< 40 mRad mRad mRad mRad-total body-skin-air gamma-air beta-air gamma-air beta ODCMS 3.8.C.1.a S- quarterly air dose limits ODCMS 3.8.C.2.a and b yearly air dose limits ODCMS 3.8.C.2.c and d B. lodines, Tritium, Particulates with Half Life >8 days-1. < 1500 mRem/Yr 2. <15 mRem 3. <30 mRem-any organ-any organ-any organ C. Liquid Effluents 1. Concentration

< 10 times 10 CFR 20, Appendix B, Table 2, Col. 2-ODCMS 3.8.C.1 .b quarterly dose limits ODCMS 3.8.C.3.a yearly dose limits ODCMS 3.8.C.3.b ODCMS 3.8.B.1.a quarterly dose limits ODCMS 3.8.B.2.a yearly dose limits ODCMS 3.8.B.2.b 2. <3.0<10 3. <6.0<20 mRem mRem mRem mRem-total body-any organ-total body-any organ D. 40 CFR 190 and 10 CFR 72.104< 25< 75< 25< 3.0 mRem mRem mRem mRem-total body-thyroid-any other organ-from liquid and gaseous effluent-thyroid from gases ODCMS 3.8.D.1.a ODCMS 3.8.D.1.b ODCMS 3.8.D.1 .c ODCMS 3.8.D.1 .d ODCMS 3.8.D.1 .e< 55 mRem 5 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC 2. 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 ODCMS 3.8.C.la.

and 3.8.C.1.b.

The Effluent Concentrations Limits (ECL) specified in 10 CFR 20, Appendix B, Table 2, Column 2 times 10, for identified nuclides, are used to calculate permissible release rates and concentrations for liquid release per Peach Bottom Offsite Dose Calculation Manual Specification 3.8.B.1.The total activity concentration for all dissolved or entrained gases is limited to< 2E-04 gCi/ml.3. Average Energy: The Peach Bottom 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 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 Peach Bottom.4. Measurements and Approximations of Total Radioactivity:

A. Fission and Activation Gases: The method used for Gamma Isotopic Analysis is the Canberra Genie System with a gas Marinelli beaker. Grab samples are taken and analyzed at least monthly to determine the isotopic mixture of noble gas activity released for the month. Airborne effluent gaseous activity was continuously monitored and recorded in accordance with ODCMS Table 4.8.C.1. The data from the noble gas radiation monitor was analyzed to report noble gas effluent activities.

When no activity was found in the grab isotopic analysis, the isotopic mixture was assumed to be that specified in ODCM IV.B. The activity released is listed as Unidentified in the Attachment 2 Tables. If activity was found in the grab isotopic analysis, the isotopic mixture for the Noble Gas Monitor was determined from that isotopic mixture.B. lodines: 6 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC The method used is the Canberra Genie System with a charcoal cartridge.

Iodine activity was continuously sampled and analyzed in accordance with ODCMS Table 4.8.C.1.C. Particulates:

The method used is the Canberra Genie System with a particulate filter (47 mm).Particulate activity was continuously sampled and analyzed in accordance with ODCM Table 4.8.C.1.Composite particulate air samples were submitted to an offsite vendor laboratory for analysis of Sr-89, Sr-90 and gross alpha.D. Liquid Effluents:

Gamma isotopic activity concentrations are determined on each batch of liquid effluent prior to release using the Canberra Genie System in accordance with ODCMS Table 4.8.B.1. The total activity of a released batch is determined by multiplying each nuclide's concentration by the total volume discharged.

Composite liquid radwaste samples counted for tritium and submitted to an offsite vendor laboratory for analysis of Fe-55, P-32, Sr-89, Sr-90 and gross alpha.E. Estimated Total Error Present CY-AA-170-2100, Estimated Errors of Effluent Measurements, provides the methodology to obtain an overall estimate of the error associated with radioactive effluents.

7 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC 5. Batch Releases: A. Liquid: QTR 1 QTR 2 QTR 3 QTR 4 Number of batch releases:

2 7 4 14 Total Time for batch releases (minutes) 184 451 325 2364 Maximum time period for batch release 121 108 115 260 (minutes):

Average time period for batch release 92 64 81 169 (minutes):

Minimum time period for batch release 63 35 45 35 (minutes):

Dilution volume (liters):

6.27E8 2.30E9 1.66E9 8.03E9 B. Gaseous: QTR 1 QTR 2 QTR 3 QTR 4 Number of batch releases:

0 0 0 0 Total Time for batch releases (minutes) 0 0 0 0 Maximum time period for batch release 0 0 0 0 (minutes):

Average time period for batch release 0 0 0 0 (minutes):

Minimum time period for batch release 0 0 0 0 (minutes):

8 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC 6. Average Stream Flow: The river flow is not used for dose calculations.

The actual discharge of circulating water is used for liquid dose calculations.

The circulating water varies from 675,000 gpm in the winter to 1,350,000 gpm in the summer.7. Abnormal Releases:

Four abnormal release sources A. Liquid: 1. Event description

-2C Residual Heat Removal (RHR) to High Pressure Service Water (HPSW) leak On 08/01/2005, routine sampling of the HPSW effluent to the discharge canal detected low-level radioactive contamination.

Subsequent investigation determined that a trace amount of condensate stay-full or primary coolant water was leaking through the Unit 2C RHR heat exchanger into the 2A loop of the HPSW system. The 2C RHR continued to be a source of contamination to the end of 2007. The leak rate was 0.04 gpm from January decreasing to 0.0044 GPM throughout the end of the year.Analysis of Releases It was estimated that the contaminated water released to the discharge canal for all of 2007 was responsible for 7.53e-3 mRem total body dose (Adult), and 7.32e-2 mRem Critical Organ (Adult GI-LLI) dose. This dose contribution was well below the limits specified in the ODCM.Samples were analyzed for all the parameters of radioactive effluent releases.

Composite liquid radwaste samples counted for tritium and submitted to an offsite vendor laboratory for analysis of Fe-55, P-32, Sr-89, Sr-90 and gross alpha. The maximum concentration from several analyses was used to ensure conservative measures of activity released.The dose contributions and isotope quantities from the releases were added to this Radioactive Effluent Release Report for the applicable reporting periods.2. Event description

-2D Residual Heat Removal (RHR) to High Pressure Service Water (HPSW) leak On 10/07/2005, routine sampling of the HPSW effluent to the discharge canal detected low-level radioactive contamination.

Subsequent investigation determined that a trace amount of condensate stay-full or primary coolant 9 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC water was leaking through the Unit 2D RHR heat exchanger into the 2B loop of the HPSW system. The 2D RHR continued to be a source of contamination to the end of 2007. The leak rate ranged from 0.0299 gpm to 0.0802 gpm January to September, decreasing to 0.0095 gpm through the end of the year.Analysis of Releases It was estimated that the contaminated water released to the discharge canal for all of 2007 was responsible 3.78E-03 mRem total body dose (Adult), and 1.16E-02 mRem Critical Organ (Adult GI-LLI) dose. This dose contribution was well below the limits specified in the ODCM.Samples were analyzed for all the parameters of radioactive effluent releases.

Composite liquid radwaste samples counted for tritium and submitted to an offsite vendor laboratory for analysis of Fe-55, P-32, Sr-89, Sr-90 and gross alpha. The maximum concentration from several analyses was used to ensure conservative measures of activity released.The dose contributions and isotope quantities from the releases were added to this Radioactive Effluent Release Report for the applicable reporting periods.3. Event description

-3D Residual Heat Removal (RHR) to High Pressure Service Water (HPSW) leak On 2/13/2006, routine sampling of the HPSW effluent to the discharge canal detected low-level radioactive contamination.

Subsequent investigation determined that a trace amount of condensate stay-full or primary coolant water was leaking through the Unit 3D RHR heat exchanger into the 2B loop of the HPSW system. The 3D RHR leak was repaired on January 27, 2007.The leak rate was 0.19 gpm starting in Januuary 2007, after being repaired the leak rate decreased to 0.001 gpm, subsequent anaylsis indicated the 3D is no longer leaking with a recent leak rate calculated of 0.00005 GPM.Analysis of Releases It was estimated that the contaminated water released to the discharge canal was responsible 1.57E-05 mRem total body dose (Adult), and 5.33E-05 mRem Critical Organ (Adult GI-LLI) dose. This dose contribution was well below the limits specified in the ODCM.10 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Samples were analyzed for all the parameters of radioactive effluent releases.

Composite liquid radwaste samples counted for tritium and submitted to an offsite vendor laboratory for analysis of Fe-55, P-32, Sr-89, Sr-90 and gross alpha. The maximum concentration from several analyses was used to ensure conservative measures of activity released.The dose contributions and isotope quantities from the releases were added to this Radioactive Effluent Release Report for the applicable reporting periods.4. Event description

-Ground Water Plume During 2007, during the development of the Radiological Ground Water Protection Program (RGPP), tritium was measured at several locations around the site. The ground water that has detectable tritium has been determined to discharge into the inake or discharge canal. The highest concentration of tritium was 2.84e-6 pCi/ml. This concentration was assumed to be the concentration of all the ground water that discharged to the discharge canal.Analysis of Releases It was estimated that the ground water flowed to the discharge canal at a rate of 175 gpm. With the maximum concentration of 2.84e-6 E-06 pCi/mI, the ground water released to the discharge canal was responsible for 8.47E-07 total body dose, and 1.07E-06 mRem Critical Organ dose. This dose contribution was well below the limits specified in the ODCM.B. Gaseous: No abnormal releases.l1 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC 8. Changes to the ODCM: There were no changes to the ODCM for the 2007 reporting period.9. Minimum Detectable Concentrations:

A. Liquid: If a radionuclide was not detected, < LLD was reported for that isotope. Samples were analyzed with techniques that achieved the required Lower Limits of Detection (LLD) as specified in Offsite Dose Calculation Manual Specification Table 4.8.B.1, Radioactive Liquid Waste Sampling and Analysis.

In all but one case, the LLD requirements were satisfied.

In that case the sample was counted late and the LLDs were no met.B. Gaseous: If a radionuclide was not detected, < LLD was reported for that isotope. Samples were analyzed with techniques which achieved the required Lower Limits of Detection (LLD) as specified in Offsite Dose Calculation Manual Specification Table 4.8.C.1, Radioactive Gaseous Waste Sampling and Analysis from Main Stack and Vent Stack. In all cases, the LLD requirements were satisfied.

12 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC 10. Violations:

A. There were no violations for the 2007 reporting period 13 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC (Page Intentionally Left Blank)14 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Attachment 2 Effluent Summary 15 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC (Page Intentionally Left Blank)16 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Attachment 2 Gaseous Effluents

-Summation Of All Releases Period: 2007 Unit: Peach Bottom Units 2 & 3 A. Fission & Activation Gases Quarter Quarter Quarter Quarter EsTotal 1 2 3 4 1. Total Release Ci 8.1OE+01 1.52E+02 1.89E+02 1.16E+02 2. Average release rate for the period pCi/sec 1.03E+01 1.93E+01 2.40E+01 1.47E+01 3. Percent of ODCM limit -Gamma 3.27E-02 1.41 E-01 7.49E-02 7.36E-02-Beta 1.30E-02 5.02E-02 2.92E-02 2.67E-02 B. Iodine 1. Total iodine -131 Ci 1.666E-03 1.950E-03 3.469E-03 1.253E-03 1.76E+01 2. Average release rate for period JCi/sec 2.113E-04 2.474E-04 4.400E-04 1.590E-04 3. Percent of ODCM limit %C. Particulates

1. Particulates with half-lives

> 8 days Ci 9.690E-03 1.129E-02 1,.508E-02 4.84E-03 1.94E+01 2. Average release rate for the period pCi/sec 1.229E-03 1.431 E-03 1.913E-03 6.14E-04 3. Percent of ODCM limit %*....3. Gross alpha radioactivity Ci <LLD <LLD <LLD <LLD ID. Tritium 11. Total release ICi 18.461E+0015.844E+0012.329E+0111.552E+01 1.11E+01 ]2. Averaqe release rate for the period pCi/sec 1.073E+0÷ 7.412E-01 12.955E+001 1.97E+00 13. Percent of ODCM limit I% ...E. Iodine 131 & 133,Tritium

& Particulate I 1. Percent of ODCM limit I% 5.403E-03..679E+0017.319E+0012.834E+0

• Limit is no longer applicable to iodine and particulate.

Section E provides limit.17 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Attachment 2 Gaseous Effluents for Elevated Release Point -Main Stack Period: 2007 Unit: Peach Bottom Units 2 & 3 INUCLIDES RELEASED CONTINUOUS MODE II BATCH MODE 1. Fission gases [TUnit][ Quarter QaQuarter QuarterJ Quarter I[Quarter4 Quarter Quarter Quarter4 Kr-85 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Kr-85m Ci 1.23E+01 1.70E+01 2.45E+01 1.93E+01 <LLD <LLD <LLD <LLD Kr-87 Ci 1.12E+00 4.78E-01 1.16E+00 1.48E-01 <LLD <LLD <LLD <LLD Kr-88 Ci 6.79E+00 1.08E+01 1.49E+01 1.27E+01 <LLD <LLD <LLD <LLD Xe-133 Ci 1.98E+01 3.16E+01 7.01E+01 3.81E+01 <LLD <LLD <LLD <LLD Xe-135 Ci 2.46E+00 3.92E+00 3.62E+00 2.20E+00 <LLD <LLD <LLD <LLD Xe-135m Ci 2.26E+00 2.35E+00 3.42E+00 1.51 E+00 <LLD <LLD <LLD <LLD Xe-138 Ci 2.43E+01 3.13E+01 4.42E+01 1.47E+01 <LLD <LLD <LLD <LLD Ar-41 Ci 2.45E-01 7.61E-01 <LLD 2.81E-01 .<LLD <LLD <LLD <LLD Xe-133m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Unidentified Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Total for Period Ci 6.93E+01 9.83E+01 1.62E+02 8.88E+01 <LLD <LLD <LLD <LLD[2. lodines _______I_______

I-7[ I : AL -I :_:::_:::

I _ ,___ 1k 1-131 Ci ] 3.25E-04 4.89E-04 6.52E-04 3.16E-04 <LLD <LLD <LLD <LLD 1-133 0Ci ]7.51E-04 1.20E-03 1.35E-03 4.13E-04 <LLD <LLD <LLD <LLD 1-135 I Ci J 2.35E-04 6.87E-04 8.88E-04 7.51E-05 <LLD <LLD <LLD <LLD Total for Period Ci i1.31 E-03 2.38E-03 2.89E-03 8.04E-04 <LLD <LLD <LLD <LLD 13. Particulates I Mn-54 Ci <LLD <LLD 9.80E-06 7.50E-06 <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD 1.25E-06 1.36E-06 <LLD <LLD <LLD <LLD Co-60 Ci <LLD 5.02E-06 2.90E-05 2.13E-05 <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD 3.21 E-06 5.61 E-06 <LLD <LLD <LLD <LLD Sr-89 Ci 6.20E-04 7.58E-04 5.47E-04 1.73E-04 <LLD <LLD <LLD <LLD Sr-90 Ci 2.13E-06 2.45E-06 1.96E-06 5.50E-07 <LLD <LLD <LLD <LLD Sb-125 Ci <LLD 1.54E-06 <LLD <LLD <LLD <LLD <LLD <LLD 1-131 Ci 3.25E-04 4.89E-04 6.52E-04 3.16E-04 <LLD <LLD <LLD <LLD 1-133 Ci 7.51E-04 1.20E-03 1.35E-03 4.13E-04 <LLD <LLD <LLD <LLD 1-135 Ci 2.35E-04 6.87E-04 8.88E-04 7.51E-05 <LLD <LLD <LLD <LLD Cs-137 Ci 8.93E-06 6.33E-06 4.01E-06 6.29E-06 <LLD <LLD <LLD <LLD Ba-140 Ci 8.99E-04 6.85E-04 4.11E-04 6.97E-04 <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD 4.29E-07 <LLD <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs-1 34 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Total for Period Ci 1.53E-03 1.46E-03 1.01E-03 9.12E-04 <LLD <LLD <LLD <LLD 18 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Attachment 2 Gaseous Effluents Ground Level Release Point -Unit 2 & 3 Roof Vents & Aux Boiler Stack Period: 2007 Unit: Peach Bottom Units 2 & 3 INuclides Released 1 Continuous Mode I Batch Mode L_1. Fission gases Unit Quarter1 Quarter2 Quarter3 Quarter Quarter Quarter Quarter4 Kr-85 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Kr-85m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Kr-87 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Xe-133 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Xe-135m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Xe-1 38 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ar-41 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Xe-133m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Unidentified Ci 1.17E+01 5.35E+01 2.71E+01 2.74E+01 <LLD <LLD <LLD <LLD Total for Period C 1 1.17E+01 5.35E+01 2.71E+01 2.74E+01 <LLD <LLD <LLD <LLD[2. lodines ____ .ý~~~~1___

______1-131 Ci 1.34E-03 1.46E-03 2.82E-03 9.38E-04 <LLD <LLD <LLD <LLD 1-133 Ci 5.35E-03 5.84E-03 7.71E-03 2.05E-03 <LLD <LLD <LLD <LLD 1-135 Ci <LLD <LLD 4.89E-04 <LLD <LLD <LLD <LLD <LLD Total for Period Ci 6.69E-03 7.30E-03 1.10E-02 2.99E-03 <LLD <LLD <LLD <LLD[3. Particulates I F I.. .I Sr-89 Ci 1.61 E-04 1.47E-04 9.87E-05 1.07E-04 <LLD <LLD <LLD .<LLD Sr-90 Ci 1.18E-06 <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs-1 34 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs137 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ba-140 Ci <LLD 1.42E-06 5.35E-05 <LLD <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cr-51 CL <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD 1.75E-05 3.23E-05 <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ag-110m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ce-1 44 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ci Ci ITotal for Period ICi 16E01.49E-0411.70E-0411.39E-041

<LLD <LLD I<LLD I<LLDý19 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Attachment 2 Liquid Effluents

-Summation Of All Releases Period: 2007 Unit: Peach Bottom Units 2 & 3 A. FISSION & ACTIVATION PRODUCTS Unit Quarter Quarter Quarter Quarter Est. Total 1 2 3 4 Error %1. Total Release (not including tritium, gases& alpha) Ci 1.702E-01 2.281E-01 1.744E-01 2.021E-01 2.11E+01 2. Average diluted concentration during batch discharaes for the period pjCi/mL 9.004E-1 1 8.293E-1 1 6.562E-1 1 8.370E-1 11 4. Percent of ODCM limit -Whole Body % 1.08E-01 2.23E-01 7.44E-02 9.23E-02-Organ 7.66E-02 1.58E-01 5.52E-02 7.94E-02 B. TRITIUM 1. Total Release Ci 1.044E+00 1.175E+00 9.277E-01 9.004E-01 6.40E+00 2. Average diluted concentration during batch discharges for the period pCi/mL 5.522E-10 4.273E-10 3.491E-10 3.728E-10 4. Percent of 10 CFR 20 limit % 5.52E-05 4.27E-05 3.49E-05 3.73E-05 C. DISSOLVED

& ENTRAINED GASES 1. Total Release Ci 3.098E-05 0.000E+00 0.OOOE+00 1.350E-04 2.11 E+01 2. Average diluted concentration during batch discharges for the period JCi/mL 1.639E-14 0.000E+00 0.000E+0 5.592E-14 4. Percent of ODCM limit % 8.20E-09 0.OOE+00 0.OOE+00 2.80E-08 D. GROSS ALPHA ACTIVITY C 7452E-05 1. Total release Ci 5C532E-05 74 1 5.98E-051 2.- 30E+01 E. VOLUMEOFWASTERELEASED(prior 1 I 1 to dilution)

I Liters 9.729E+019.839E+0"9.942E+0"1

.276E+08 5.OOE+00O DURING BATCH DISCHLUTION WATER USED I.Lters 1.890E+ I2.750E+2.657E+2.415E+1 20 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Attachment 2 Liquid Effluents Release Point -Liquid Radwaste & RHR Leaks & RBCCW Leaks Period: 2007 Unit: Peach Bottom Units 2 & 3 INUCLIDES RELEASED CONTINUOUS MODE I BATCH MODE 1. Fission gasesI UnitIr Quarter Quarter Quarter Quarter Quarter Q 213 Iure Qure IIureIIQat 1 2 3 4 1 2 3 4 Sr-89 Ci 7.54E-06 6.76E-06 5.17E-06 5.17E-06 <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs-1 34 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs-137 Ci 5.85E-04 7.87E-04 6.02E-04 6.02E-04 2.36E-07 1.36E-06 4.46E-07 4.99E-07 1-131 Ci 1.10E-05 <LLD <LLD <LLD <LLD <LLD <LLD <LLD Co-58 Ci 6.37E-03 8.58E-03 6.56E-03 6.56E-03 <LLD <LLD <LLD <LLD Co-60 Ci 7.57E-02 1.01 E-01 7.73E-02 7.73E-02 <LLD <LLD <LLD 1.71 E-05 Fe-59 Ci 6.59E-03 8.87E-03 6.79E-03 6.79E-03 <LLD <LLD <LLD <LLD Zn-65 Ci 8.95E-03 1.20E-02 9.17E-03 9.17E-03 <LLD, <LLD <LLD <LLD Mn-54 Ci 3.60E-02 4.83E-02 3.69E-02 6.46E-02 2.80E-07 <LLD <LLD <LLD Cr-51 Ci 2.71 E-02 3.66E-02 2.80E-02 2.80E-02 <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Nb-95 Ci 5.78E-04 7.78E-04 5.95E-04 5.95E-04 <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Tc-99m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ba-1 40 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD La-1 40 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ag-i 1 Om Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Fe-55 Ci 8.27E-03 1.11E-02 8.52E-03 8.52E-03 <LLD <LLD <LLD <LLD P-32 Ci 2.12E-06 <LLD <LLD <LLD <LLD <LLD <LLD <LLD Sb-124 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Hf-175 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Nb-95m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Nb-97 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Sb-125 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Nd-147 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD 1-133 Ci 1.95E-05 <LLD <LLD <LLD <LLD <LLD <LLD <LLD Tritium Ci 1.04E+00 1.18E+00 9.28E-01 9.00E-01 5.60E-04 <LLD 6.04E-05 <LLD Ci Ci Ci Total for Period Ci 1.21E+00 1.40E+00 1.10E+00 1.10E+00 5.61E-04 1.36E-06 6.09E-05 1.76E-05 Xe-133 Ci 1.50E-05 <LLD <LLD <LLD <LLD <LLD <LLD 2.58E-05 Xe-135 Ci 1.60E-05 <LLD <LLD <LLD <LLD <LLD <LLD 1.09E-04 Xe-133m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD 21 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC (Page Intentionally Left Blank)22 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Attachment 3 Solid Waste and Irradiated Fuel Shipments 23 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC (Page Intentionally Left Blank)24 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC A. SOLID WASTE SHIPPED OF SITE FOR BURIAL OR DISPOSAL (Not irradiated fuel) 1/1/2007-12/31/2007

1. Type of Waste units 2007 Est. error %a: spent resin, filters, sludges, evaporator bottoms, etc M3 5.77E+01 I I I 1c0 1.99E+02 25 b: dry compressible waste, contaminated equipment, etc. M3 9.17E+02] Ci 1.59E+01 25 c: Irradiated components, control rods, etc. M3 I 3.25E+001_I I Ci I 2.43E+04 251 d: Other (describe) oil M3 9.45E+00 IIICi I1.85E-04 2J5 2. Estimate of major nuclide compostion (by type of waste)Category A: spent resin, filters, sludges, evaporator bottoms, etc abundance nuclide (0.01 % min) activity (Ci)H-3 0.03% 5.73E-02 C-14 0.36% 7.19E-01 Mn-54 5.34% 1.06E+01 Fe-55 22.29% 4.43E+01 Fe-59 0.01% 1.62E-02 Co-58 0.11% 2.26E-01 Co-60 61.24% 1.22E+02 Ni-63 2.68% 5.34E+00 Zn-65 3.44% 6.85E+00 Sr-90 0.02% 4.72E-02 Tc-99 0.01% 1.73E-02 Ag-110m 0.08% 1.56E-01 Cs-134 0.22% 4.45E-01 Cs-137 3.71% 7.38E+00 Ce-141 0.01% 1.90E-02 Ce-144 0.15% 2.90E-01 Pu-241 0.29% 5.72E-01 Totals 100.0% 1.99E+02 25 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Category B: Dry compressible waste, contaminated equipment, etc.abundance nuclide (0.01 % min) activity (Ci)H-3 0.02% 3.39E-03 C-14 0.06% 9.32E-03 Mn-54 8.51% 1.36E+00 Fe-55 20.93% 3.34E+O0 Fe-59 0.01% 1.95E-03 Co-58 0.28% 4.45E-02 Co-60 59.97% 9.56E+00 Ni-63 1.21% 1.92E-01 Zn-65 4.29% 6.85E-01 Sr-90 0.03% 4.82E-03 Nb-95 0.01% 8.20E-04 Tc-99 0.01% 2.28E-03 Ag-110m 0.01% 1.42E-03 Cs-1 34 0.37% 5.95E-02 Cs-137 4.13% 6.59E-01 Ce-141 0.02% 3.57E-03 Ce-144 0.13% 2.15E-02 Pu-241 0.01% 1.03E-03 T otals 100.0% 1.59E+01 Category C: Irradiated components, control rods, etc.abundance nuclide (0.01 % min) activity (Ci)C-14 0.01% 2.20E+00 Mn-54 0.91% 2.21E+02 Fe-55 44.83% 1.09E+04 Co-58 0.01% 1.94E+00 Co-60 48.98% 1.19E+04 Ni-59 0.02% 5.96E+00 Ni-63 5.16% 1.26E+03 Sn-119m 0.01% 2.16E+00 Sb-125 0.05% 1.24E+01 Te-125m 0.01% 1.25E+00 T-a-182 0.01% 1.87E+00]Totals 100.0% 2.43E+04 26 Facility:

Peach Bottom Units 2 & 3 Category D: Other (describe)

Oil abundance nuclide (0.01 % min) activity (Ci)C-14 0.47% 8.66E-07 Fe-55 7.33% 1.36E-05 Co-60 13.21% 2.45E-05 Ni-63 0.75% 1.40E-06 Sr-90 2.28% 4.23E-06 Tc-99 0.06% 1.05E-07 1-129 0.02% 3.70E-08 Cs-1 37 37.64% 6.98E-05 Ce-144 38.23% 7.09E-05 Totals 100.0% 1.85E-04 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC 3. Solid Waste Dispostion Number of shipments Mode of Transportation Destination 1 highway Alaron Corp. (Wampum, PA)4 highway Barnwell Waste Mgmt. Facility 9 highway Energy Solutions (Clive, UT)20 highway Energy Solutions (Oak Ridge, TN)2 highway Studsvik Processing Facility, LLC B. IRRADIATED FUEL SHIPMENTS (Dispostion)

No shipment of irradiated fuel were made during the reporting period of 2007.C. Changes to Process Control Program (PCP)There was no revision to RW-AA-100 "Process Control Program for Radioactive Waste". in 2007.27 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC (Page Intentionally Left Blank)28 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Attachment 4 Radiological Impact on Man 29 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC (Page Intentionally Left Blank)30 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC 1. Radiological Impact on Man The Annual Radiation Dose Assessment Report for January 1, 2007 to December 31, 2007 contained dose calculations based on current year meteorology and river flows.The total body and skin doses, 40 CFR 190 doses and doses to MEMBERS OF THE PUBLIC due to activities inside the site boundary are found in the Annual Radiation Dose Assessment Report for January 1, 2007 to December 31, 2007.2. A summary of gaseous and liquid radiation annual doses to MEMBERS OF THE PUBLIC as calculated by the ODCM follows: Effluent Applicable Estimated Age Location % of Limit Unit Organ Dose Group Distance Direction Applicable (meters) (toward) Limit Noble Gas Gamma -Air Dose 3.22E-02 All 1097 SSE 1.61 E-01 20 mRad Noble Gas Beta -Air Dose 2.379E-02 All 1097 SSE 5.95E-02 40 mRad Iodine, Particulate

& Thyroid 1.776E+00 Infant 1097 SSE 5.92E+00 30 mrem Tritium Direct T Diati Total Body <LLD All 1150 SSE <LLD 22 mrem Radiation Liquid Total Body 1.502E-02 Adult Site Boundary 2.50E-01 6 mrem GI-LLI 3.695E-02 Adult Site Boundary 1.85E-01 20 mrem Doses calculated were well below all ODCM limits.3. Liquid and gaseous effluent radiation monitors and instrumentation No effluent radiation monitors and instrumentation were unavailable for periods beyond the requirements of the ODCM.31 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC (Page Intentionally Left Blank)32 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Attachment 5 Meteorological Data 33 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC (Page Intentionally Left Blank)34 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Attachment 5 Meteorological Data The meteorological data can be found in the Annual Radiation Dose Assessment Report for January 1, 2007 through December 31, 2007.35 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC (Page Intentionally Left Blank)36 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January -March 2007 Stability Class Extremely Unstable -150Ft-33Ft Delta-T (F)Winds Measured at 33 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 2 5 14 6 0 0 0 0 0 0 0 0 1 0 1 0 2 2 2 0 5 8 7 2 4 2 5 5 4 9 3 2 0 5 2 0 0 0 1 2 0 15 8 2 7 23 39 12 3 0 7 6 7 14 11 9 9 2 19 10 7 12 33 50 20 6 0 Total 29 62 119 12 0 0 222 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 8 Hours of missing stability measurements in all stability classes: 145 37 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January -March 2007 Stability Class -Moderately Unstable -150Ft-33Ft Delta-T (F)winds Measured at 33 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 1 0 0 0 0 0 1 2 7 1 0 3 13 39 26 9 0 1 1 3 4 5 3 12 8 10 2 3 4 23 50 47 12 0 Total 21 45 102 20 0 0 188 Hours of calm in this stability class: 0 Hours of missing Hours of missing wind measurements in this stability class: 3 stability measurements in all stability classes: 145 38 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January -March 2007 Stability Class -Slightly Unstable -150Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W 1-3 0 5 2 0 1 2 0 0 1 1 0 0 0 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 0 0 0 0 0 0 0 3 6 2 0 1 4 3 4 5 3 3 3 9 NW NNW Variable Total 0 0 1 0 4 17 1 2 1 0 7 1 0 5 0 0 6 0 0 0 0 0 0 22 0 14 0 0 3 0 13 22 44 0 85 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability classes: 145 39 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January -March 2007 Stability Class -Neutral Winds Measured at-150Ft-33Ft Delta-T (F)33 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 11 8 7 5 12 10 9 9 6 6 7 4 10 10 7 3 0 6 8 1 0 2 5 10 28 14 10 14 11 35 45 29 17 0 21 0 0 0 0 1 0 5 5 1 2 6 42 107 55 19 0 264 0 0 0 0 0 0 0 2 1 0 0 0 5 20 16 1 0 45 38 16 8 5 14 16 19 44 26 17 23 21 92 183 107 40 0 Total 124 235 1 0 669 Hours of calm in Hours of missing this stability class: 5 wind measurements in this stability class: 11 Hours of missing stability measurements in all stability classes: 145 40 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January -March 2007 Stability Class -Slightly Stable Winds Measured at-150Ft-33Ft Delta-T (F)33 Feet Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Wind Speed (in mph)8-12 13-18 19-24 > 24 Total 1-3 4-7 3 14 26 21 24 25 17 16 11 11 7 13 14 14 11 7 0 11 8 6 0 1 4 17 27 26 11 21 52 70 32 19 15 0 3 1 0 0 0 0 4 2 9 2 0 3 12 4 0 0 0 40 17 23 32 21 25 29 38 45 46 24 28 68 96 50 30 22 0 Total 234 320 0 0 0 594 Hours of calm in this stability class: 16 Hours of missing wind measurements in this stability'class:

2 Hours of missing stability measurements in all stability classes: 145 41 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January -March 2007 Stability Class -Moderately Stable Winds Measured at-15OFt-33Ft Delta-T (F)33 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 1 3 1 5 12 11 3 1 5 2 4 10 9 7 9 2 0 1 4 1 5 14 13 3 1 5 3 11 18 11 8 10 2 0 Total 85 25 0 0 0 0 110 Hours of calm in this stability class: 19 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 145 42 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January -March 2007 Stability Class -Extremely Stable-150Ft-33Ft Delta-T (F)Winds Measured at 33 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 0 0 2 7 13 0 3 1 1 6 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 1 0 0 2 7 0 13 0 0 0 0 0 0 3 1 1 7 14 3 5 1 2 0 59 3 1 0 0 0 0 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 17 0 4 0 0 0 0 5 1 2 0 0 64 Hours of calm in this stability class: 16 Hours of missing Hours of missing wind measurements in this stability class: stability measurements in all stability cl 0 asses: 145 43 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January -March 2007 Stability Class -Extremely Unstable -316Ft-33Ft Delta-T (F)Winds Measured at 320 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 Total 0 4 14 2 0 0 20 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 100 44 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January -March 2007 Stability Class -Moderately Unstable -316Ft-33Ft Winds Measured at 320 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 0 0 0 0 0 0 0 0 0 3 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8-12 13-18 19-24 > 24 Total Total 0 5 3 6 1 0 15 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: 100 45 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January -March 2007 Stability Class -Slightly Unstable -316Ft-33Ft Delta-T (F)Winds Measured at 320 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE 1-3 0 0 0 0 0 0 0 0 4-7 8-12 13-18 19-24 > 24 Total 0 0 1 1 1 2 1 0 0 0 1 0 0 0 3 0 3 2 0 1 0 0 0 0 8 2 2 4 5 0 1 0 0 0 0 0 0 1 1 0 1 4 0 0 0 3 3 2 0 2 0 0 1 2 0 4 0 0 S SSW SW WSW 0 0 0 0 0 10 0 19 W 0 0 0 1 0 0 0 0 0 0 3 3 3 2 0 0 0 0 0 0 3 5 9 0 12 2 31 WNW 0 9 18 0 NNW 0 3 3 0 0 2 0 0 0 5 3 Variable Total 0 0 0 0 7 25 42 28 2 104 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 0 stability class: 0 all stability classes: 100 46 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January -March 2007 Stability Class -Neutral -316Ft-33Ft Winds Measured at 320 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 6 5 8 8 7 10 12 11 10 7 4 5 7 8 6 9 0 7 7 6 11 3 10 22 23 34 8 15 6 6 18 16 32 0 224 17 12 11 9 0 3 20 7 25 10 12 9 33 86 56 33 0 343 10 1 1 0 0 1 3 1 2 0 1 1 21 116 78 10 0 246 0 0 0 0 0 0 0 0 1 0 0 0 12 41 58 4 0 40 26 28 29 11 25 58 44 73 25 32 22 80 270 215 91 0 Total 17 123 116 1069 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 23 Hours of missing stability measurements in all stability classes: 100 47 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January -March 2007 Stability Class -Slightly Stable -316Ft-33Ft Delta-T (F)Winds Measured at 320 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 6 4 2 5 10 8 8 13 6 15 9 6 1 2 2 0 12 7 4 9 3 5 18 6 46 31 22 14 18 16 28 17 0 6 5 3 0 2 6 0 5 24 17 13 18 47 43 28 7 0 26 20 11 10 23 31 20 90 58 56 43 85 69 58 29 0 Total 12 104 256 224 41 3 640 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 100 48 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January -March 2007 Stability Class -Moderately Stable -316Ft-33Ft Delta-T (F).Winds Measured at 320 Feet Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 1 NE 0 ENE 0 E 0 ESE 0 SE 1 SSE 1 S 1 SSW 1 SW 0 WSW 1 W 0 WNW 0 NW 2 NNW 0 Variable 0 0 2 3 1 1 1 1 1 6 6 5 2 2 6 5 0 0 2 0 1 0 0 0 2 1 12 22 5 7 6.1 8 5 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 3 0 0 4 0 0 0 1 0 1 0 0 1 0 0 1 0 0 0 0 0 2 3 4 2 1 2 4 3 19 30 13 14 9 8 16 6 0 Total 8 42 72 13 1 0 136 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 2 stability c all stabili lass: 0 ty classes: 100 49 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January -March 2007 Stability Class -Extremely Stable -316Ft-33Ft Delta-T (F)Winds Measured at 320 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 0 2 0 0 0 1 0 0 4-7 8-12 13-18 19-24> 24 Total 1 0 0 0 0 1 0 2 2 1 0 0 0 3 0 0 0 0 0 1 0 0 0 0 3 9 3 3 4 1 4 1 0 0 0 0 0 0 0 0 0 0 2 0 1 0 1 0 0 0 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 2 1 0 0 0 0 0 0 0 1 2 0 5 0 0 0 0 1 0 0 0 0 13 0 0 0 0 0 0 0 4 4 4 3 7 1 0 5 11 29 0 49 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: 100 50 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April -June 2007 Stability Class -Extremely Unstable -150Ft-33Ft Delta-T (F)Winds Measured at 33 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 4 14 10 15 24 26 12 7 0 1 4 7 SE SSE S SSW SW WSW W WNW 4 11 1 14 2 17 2 2 0 0 0 0 1 5 5 1 4 0 2 9 5 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 20 0 19 0 15 0 25 0 30 0 19 0 16 0 20 0 24 0 1 0 0 2 2 3 2 0 2 1 3 0 0 0 0 4 7 0 4 NW NNW Variable Total 0 13 0 10 0 43 1 28 13 0 104 0 114 0 49 0 0 0 269 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 8 Hours of missing stability measurements in all stability classes: 53 51 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April -June 2007 Stability Class -Moderately Unstable -150Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 10 2 0 0 0 2 2 5 13 3 3 10 10 4 21 0 17 10 9 7 11 4 3 9 14 6 5 1 10 20 12 27 0 Total 48 77 38 2 0 0 165 7 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: 53 52 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April -June 2007 Stability Class -Slightly Unstable Winds Measured at-15OFt-33Ft 33 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 0 5 3 4 3 1 1 0 1 0 0 0 0 0 0 2 0 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 4 7 3 0 4 0 0 0 0 0 0 0 0 0 0 0 3 1 2 0 6 2 2 2 6 7 5 0 14 0 0 Total 20 32 16 0 0 0 68 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: 53 53 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April -June 2007 Stability Class -Neutral Winds Measured at-150Ft-33Ft Delta-T (F)33 Feet Wind Speed (in mph)8-12 13-18 19-24 > 24 Total Wind Direction 1-3 4-7 N 19 NNE 21 NE 13 ENE 12 E 11 ESE 5 SE 6 SSE 8 S 4 SSW 7 SW 4 WSW 6 W 8 WNW 7 NW 12 NNW 14 Variable 0 32 9 1 0 5 2 8 12 21 6 0 5 13 23 13 50 0 200 11 1 0 0 0 0 2 5 3 1 2 4 11 33 7 28 0 108 0 0 0 0 0 0 0 0 0 0 0 0 2 11 13 10 0 36 62 31 14 12 16 7 16 25 28 14 6 15 34 74 46 102 0 Total 157 0 502 Hours of calm in Hours of missing this stability class: 0 wind measurements in this stability class: 4 Hours of missing stability measurements in all stability classes: 53 54 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April -June 2007 Stability Class -Slightly Stable Winds Measured at-150Ft-33Ft Delta-T (F)33 Feet Win Wind Direction N NE ENE ESE SE SSE S SSW SW WSW W WNW NW NNW Variable.d Speed (in mph)8-12 13-18 1-3 4-7 19-24 > 24 Total 18 14 8 6 13 12 29 44 32 29 17 20 29 32 29 22 0 19 11 1 0 9 2 10 32 32 15 22 27 54 26 43 39 0 43 25 9 6 22 14 39 76 65 44 40 51 91 63 78 65 0 Total 354 342 30 4 1 0 731 Hours of calm in this stability class: 17 Hours of missing Hours of missing wind measurements in this stability class: stability measurements in all stability cl 2 asses: 53 55 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April -June 2007 Stability Class -Moderately Stable Winds Measured at-150Ft-33Ft Delta-T (F)33 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 2 1 1 3 4 4 1 4 4 17 16 33 24 23 24 9 0 170 0 0 0 0 0 0 0 0 1 4 3 22 21 4 3 3 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 1 1 3 4 4 1 4 5 21 19 56 45 27 27 12 0 61 1 0 232 Hours of calm in this stability class: 8 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 53 56 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April -June 2007 Stability Class -Extremely Stable Winds Measured at-150Ft-33Ft Delta-T (F)33 Feet Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 1 0 0 0 0 0 0 0 3 0 1 0 0 0 0 0 0 0 0 1 16 2 36 13 23 2 9 1 7 0 0 0 0 0 96 19 Wind Speed (in mph)8-12 13-18 19-24 > 24 Total 1 0 0 0 3 1 0 0 0 1 18 49 25 10 7 0 0 Total 0 0 0 0 115 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 53 57 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April -June 2007 Stability Class -Extremely Unstable -316Ft-33Ft Delta-T (F)Winds Measured at 320 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 2 9 15 11 11 12 0 0 0 0 0 0 0 0 0 0 Total 1 21 26 this stability class: 7 4 1 60 Hours of calm in Hours of missing 0 wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 7 58 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April -Stability Class -Moderately Unstable Winds Measured at 320 June 2007-316Ft-33Ft Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW 1-3 0 0 0 0 0 0 0 0 0 0 4-7 0 1 1 6 7 4 1 1 1 0 0 0 0.0 0 0 0 8-12 13-18 19-24 > 24 Total 0 2 3 8 8 9 9 6 8 2 3 0 2 3 2 SW WSW W WNW NW NNW Variable Total 0 0 0 0 0 0 7 0 0 22 23 25 72 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 7 59 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April -Stability Class -Slightly Unstable Winds Measured at 320 June 2007-316Ft-33Ft Delta-T (F)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 0 11 1 0 0 0 5 3 7 8 0 12 0 0 5 7 0 12 0 0 0 4 8 1 0 0 0 0 0 0 0 0 1 1 2 3 4 7 6 6 0 4 0 1 11 4 15 0 9 3 12 11 1 31 Variable 0 0 0 0 0 Total 3 28 48 40 23 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 7 149 0 Hours of missing stability measurements in all stability classes: 7 60 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April -June 2007 Stability Class -Neutral -316Ft-33Ft Delta-T (F)Winds Measured at 320 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 12 20 13 18 7 11 11 24 25 10 21 14 11 18 7 11 9 23 12 14 6 6 6 10 8 13 2 21 7 23 15 53 0 0 14 7 5 1 3 16 9 6 25 8 3 5 22 26 18 38 0 11 3 1 1 0 13 2 0 2 1 0 6 23 31 9 18 0 1 3 0 0 1 1 0 0 0 0 0 1 5 21 17 13 0 61 50 33 46 48 68 46 26 59 38 17 28 74 104 76 140 0 Total 63 172 289 206 121 63 914 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 7 61 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April -June 2007 Stability Class -Slightly Stable -316Ft-33Ft Delta-T (F)Winds Measured at 320 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 15 10 3 3 4 7 16 19 20 14 17 5 3 5 8 12 0 19 30.-13 8 3 12 12 12 38 26 18 15 13 13 20 25 0 277 17 3 1 3 3 5 2 7 20 18 16 15 23 35 30 20 0 54 45 20 17 14 32 32 42 83 62 54 40 48 60 66 63 0 Total 42 161 218 30 4 732 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability classes: 7 62 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April -June 2007 Class -Moderately Stable -316Ft-33Ft Winds Measured at 320 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 0 0 0 0 0 0 0 1 2 2 12 5 13 4 2 0 17 12 5 4 3 4 0 5 12 8 9 20 12 26 26 14 0 Total 15 52 59 43 8 0 177 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 7 63 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April -June 2007 Stability Class -Extremely Stable -316Ft-33Ft Delta-T (F)Winds Measured at 320 Feet wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE 1-3 0 1 0 0 0 0 0 4-7 8-12 13-18 19-24 > 24 Total 3 2 1 2 0 0 3 3 3 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 0 0 6 4 0 0 0 0 2 0 0 SSE S SSW SW WSW W WNW NW NNW Variable Total 0 0 1 1 1 0 1 2 2 0 1 0 0 1 1 2 1 2 2 0 4 0 0 0 0 2 2 0 1 6 0 0 0 0 0 0 3 2 1 2 5 5 7 0 4 4 0 0 15 0 0 9 25 20 12 0 66 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 7 64 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July -September 2007 Stability Class -Extremely Unstable -15OFt-33Ft Delta-T (F)Winds Measured at 33 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 1 4 10 10 12 14 8 3 3 0 0 0 0 0 0 0 0 17 1 0 0 0 8 12 27 28 3 4 0 0 1 1 13 0 20 5 10 10 12 22 20 30 32 3 4 0 0 1 1 14 0 Total 65 115 4 0 0 0 184 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: 47 65 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July -September 2007 Stability Class -Moderately Unstable -150Ft-33Ft Delta-T (F)Winds Measured at 33 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 3 17 5 8 10 5 4 2 3 1 0 0 0 4 9 3 0 12 2 0 0 0 0 0 0 0 0 0 0 0 0 0 2 6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10 0 5 0 0 4 6 8 9 0 12 0 12 0 22 1 0 0 2 0 2 4 8 3 3 2 3 0 0 0 0 0 0 5 8 3 5 2 7 NW NNW Variable 1 20 0 27 0 0 0 0 Total 46 89 10 0 0 145 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: 47 66 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Stability Period of Record: July -Class -Slightly Unstable Winds Measured at September.

2007-150Ft-33Ft 33 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W 2 11 0 14 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 4 5 2 2 1 8 7 5 2 2 2 3 6 NW NNW Variable 0 14 0 17 0 0 0 0 Total 28 50 7 0 0 0 85 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabil ity class: 0 Hours of missing stability measurements in all stability classes: 47 67 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July -Stability Class -Neutral Winds Measured at September 2007-15OFt-33Ft Delta-T (F)33 Feet Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N NNE NE ENE 26 35 16 17 14 4 6 4 1 0 0 0 0 3 E ESE SE SSE S SSW SW WSW W 0 0 0 0 0 0 0 1 0 0 0 0 0 26 30 18 28 5 10 5 21 7 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 61 0 17 0 17 0 14 4 6 7 0 57 0 46 0 15 0 26 0 17 7 1 7 0 8 6 NW NNW Variable Total 6 14 8 53 0 4 7 0 12 0 13 0 24 0 68 0 175 0 213 0 0 0 400 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 3 stability class: 1 all stability classes: 47 68 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Ge P Peach Bottom Nuclear Station Period of Record: July -Septembe Stability Class -Slightly Stable -150 Winds Measured at 33 Feet Wind Speed (in mph)neration Company, LLC SEG Nuclear, LLC r 2007 Ft-33Ft Delta-T (F)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 43 12 6 7 2 7 39 80 92 35 15 24 33 19 22 37 0 473 37 1 0 0 0 0 11 74 36 12 28 17 19 20 46 49 0 350 81 13 6 7 2 7 50 154 128 47 44 41 52 39 70 88 0 Total 6 0 0 0 829 0 Hours of calm in this stability class: 7 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability classes: 47 69 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July -September 2007 Stability Class -Moderately Stable -150Ft-33Ft Delta-T (F)Winds Measured at 33 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 4 0 0 0 2 2 4 8 22 25 27 39 42 32 23 8 0 238 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 0 0 4 0 0 0 2 0 0 0 3 0 0 0 11 0 0 0 6 1 0 0 7 0 0 0 10 0 0 0 5 0 0 0 0 0 0 0 0 5 0 0 0 0 0 0 0 2 0 2 0 4 0 11 0 26 0 27 0 30 0 50 0 49 0 39 0 33 0 13 0 0 0 291 52 1 0 0 Hours of calm in this stability class: 3 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 47 70 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July -September 2007 Stability Class -Extremely Stable -150Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 0 ENE 0 E 0 ESE 0 SE 1 SSE 1 S 3 SSW 6 SW 42 WSW 93 W 23 WNW 8 NW 4 NNW 1 Variable 0 0 0 0 0 0 0 0 0 0 1 7 16 7 0 0 0 0 31 0 0 0 0 0 0 1 1 3 7 49 109 30 8 4 1 0 Total 182 0 213 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: 47 71 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July -September 2007 Stability Class -Extremely Unstable -316Ft-33Ft Delta-T (F)Winds Measured at 320 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 0 0 0 4 11 2 0 0 0 0 0 0 0 0 0 0 0 0 1 3 8 11 15 10 3 2 0 0 0 0 0 0 0 0 Total 0 17 33 3 0 0 53 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: 47 72 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July -September 2007 Stability Class -Moderately Unstable -316Ft-33Ft Winds Measured at 320 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE 1-3 0 0 0 0 0 0 0 0 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 5 2 5 3 1 2 0 0 0 0 1 2 4 S SSW SW WSW W WNW NW NNW Variable Total 0 0 0 0 0 0 0 0 0 0 12 0 0 0 0 0 0 0 3 0 0 0 0 0 1 0 0 5 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 2 6 6 5 3 0 0 0 15 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 1 1 0 0 0 1 0 0 0 16 23 0 45 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: 47 73 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July -September 2007 Stability Class -Slightly Unstable -316Ft-33Ft Delta-T (F)Winds Measured at 320 Feet Wind Direction Wind Speed (in mph)8-12 13-18 19-24 > 24 Total 1-3 4-7 N 0 NNE 0 NE 2 ENE 0 E 3 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW 0 NW 0 NNW 0 Variable 0 2 2 2 5 10 4 3 1 0 1 0 0 0 0 0 0 0 6 6 1 0 0 1 6 7 15 6 2 0 0 1 2 7 0 11 9 5 5 13 5 10 9 15 8 2 0 0 1 4 12 0 Total 5 30 60 12 2 0 109 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: 47 74 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July -September 2007 Stability Class -Neutral -316Ft-33Ft Winds Measured at 320 Feet Delta-T (F)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 1 2 3 19 8 7 0 5 0 3 2 2 0 1 3 0 0 16 11 19 24 18 14 10 14 25 16 10 12 9 5 8 22 0 32 20 14 21 8 8 19 25 34 17 28 17 6 8 22 56 0 335 12 1 4 0 5 1 2 6 11 5 7 8 2 5 18 27 0 114 61 34 40 64 39 30 31 50 70 41 47 39 18 20 57 113 0 Total 56 233 16 0 754 2 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: 47 75 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July -September 2007 Stability Class -Slightly Stable -316Ft-33Ft Winds Measured at 320 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW 0 8 35 27 0 17 16 10 1 12 21 1 1 9 7 7 3 6 0 0 0 1 6 3 1 0 0 0 0 6 21 1 16 28 5 27 41 24 4 29 84 30 1 21 60 12 3 12 19 1 11 15 8 7 8 0 0 2 0 3 4 0 3 6 4 0 26 0 73 0 44 0 34 0 17 0 11 0 34 0 51 0 97 0 149 0 94 1 46 0 38 0 25 0 28 0 52 0 59 1 1 0 1 0 2 14 6 7 11 6 15 25 7 13 34 Variable Total 0 0 384 0 203 0 0 27 211 1 852 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 2 stability class: 1 all stability classes: 47 76 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July -September 2007 Stability Class -Moderately Stable -316Ft-33Ft Winds Measured at 320 Feet Delta-T (F)Wind Direction N Wind Speed (in mph)1-3 4-7 8-12 13-18 19-24 > 24 Total 2 5 NNE NE ENE E ESE SE SSE S 0 11 2 3 0 0 0 1 9 4 3 1 2 6 6 3 4 1 0 0 2 1 6 8 9 6 2 0 0 0 0 0 1 2 3 0 2 4 13 0 0 0 0 0 0 0 0 0 0 0 2 1 1 0 0 0 4 0 0 0 0 0 8 3 1 4 9 SSW SW WSW W WNW NW NNW Variable Total 0 19 0 16 0 15 3 3 3 2 2 1 1 0 9 6 3 10 0 25 0 23 0 18 0 20 0 37 0 23 0 24 0 15 4 17 13 3 11 4 13 6 6 4 0 2 0 8 0 0 0 27 85 99 45 0 260 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: 47 77 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July -September 2007 Stability Class -Extremely Stable -316Ft-33Ft Delta-T (F)Winds Measured at 320 Feet Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 2 6 0 0 0 10 NNE 0 5 1 0 0 0 6 NE 0 1 2 0 0 0 3 ENE 0 4 0 0 0 0 4 E 0 1 0 0 0 0 1 ESE 0 0 0 0 0 0 0 SE 1 0 0 0 0 0 1 SSE 0 2 0 0 0 0 2 S 1 1 1 0 0 0 3 SSW 1 0 1 0 0 0 2 SW 1 6 0 0 0 0 7 WSW 3 1 5 0 0 0 9 W 1 3 5 1 0 0 10 WNW 0 1 3 1 0 0 5 NW 2 1 5 2 0 0 10 NNW 1 1 6 0 0 0 8 Variable 0 0 0 0 0 0 0 Total 13 29 35 4 0 0 81 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 47 78 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October -December 2007 Class -Extremely Unstable -150Ft-33Ft Stability Delta-T (F)Winds Measured at 33 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 2 2 5 10 5 7 3 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 2 5 0 10 0 0 5 9 3 12 0 15 0 0 0 0 0 0 0 0 0 0 9 6 5 2 2 0 0 0 9 7 6 2 2 0 0 2 0 2 0 0 0 0 0 0 2 0 2 0 34 46 0 82 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 79 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October -December 2007 Stability Class -Moderately Unstable -150Ft-33Ft Delta-T (F)Winds Measured at 33 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 0 2 0 0 0 0 0 0 0 0 0 2 0 8 0 7 1 2 1 0 0 0 0 2 0 5 0 2 1 7 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total 15 42 4 0 0 0 61 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 80 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October Stability Class -Slightly Unstable Winds Measured at-December 2007-150Ft-33Ft Delta-T (F)33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W 1-3 2 1 2 2 0 1 0 0 0 1 1 1 0 0 0 0 0 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 1 2 2 0 1 2 0 0 3 5 9 4 6 NW 6 1 0 Variable 0 0 Total 11 24 13 0 0 0 48 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 1 stability class: 0 all stability classes: 3 81 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Stability Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total Peach Bottom Nuclear Period of Record: October Class -Neutral Winds Measured at Wind Speed Station-December 2007-150Ft-33Ft Delta-T (F)33 Feet (in mph)1-3 17 21 20 18 13 8 8 9 11 7 6 6 2 4 3 4 0 157 4-7 8-12 13-18 19-24 > 24 Total 12 2 0 0 1 4 13 21 28 9 6 9 17 11 29 13 0 175 0 0 0 0 0 0 0 2 4 3 3 2 10 24 38 17 0 103 29 23 20 18 14 12 21 33 44 19 15 17 35 46 73 34 0 0 453 Hours of calm in this stability class: Hours of missing wind measurements in this 1 stability class: 4 Hours of missing stability measurements in all stability classes: 3 82 Facility:

Peach Bottom Units 2 & 3 Licensee: Peach Bottom Nuclear Period of Record: October Stability Class -Slightly Stable Winds Measured at Wind Speed Exelon Generation Company, LLC PSEG Nuclear, LLC Station-December 2007-150Ft-33Ft Delta-T (F)33 Feet (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 26 52 48 37 33 34 48 39 46 35 19 22 30 16 37 14 0 536 31 16 3 0 1 5 39 55 45 10 18 33 72 67 42 36 0 2 0 0 0 0 0 1 5 6 3 0 1 23 40 21 13 0 59 68 51 37 34 39 88 100 98 49 37 57 136 124 102 63 0 Total 473 115 18 0 0 1142 Hours of calm in this stability class: 14 Hours of missing wind measurements in this stability class: 31 Hours of missing stability measurements in all stability classes: 3 83 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October Stability Class -Moderately Stable winds Measured at-December 2007-150Ft-33Ft Delta-T (F)33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S 1-3 3 1 2 3 4 7 7 10 7 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 1 0 0 4 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 1 2 3 4 7 8 0 10 0 7 SSW SW WSW W WNW 14 18 31 26 34 22 0 0 0 0 0 0 18 0 26 0 57 0 56 0 19 0 16 0 10 11 13 8 NNW Variable Total 9 0 174 3 1 0 73 0 0 0 0 0 0 0 247 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 7 stability class: 0 all stability classes: 3 84 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Stability Wind Directior N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Peach Bottom Nuclear Station Period of Record: October -Decemf Class -Extremely Stable -15 Winds Measured at 33 Feet Wind Speed (in mph ber 2007 0Ft-33Ft Delta-T (F)2 1-3 4-7 8-12 13-18 19-24 > 24 Total 2 2 0 1 1 2 0 0 0 5 16 23 19 5 4 2 0 0 0 0 0 0 0 0 0 0 1 9 18 3 0 0 0 0 2 2 0 1 1 2 0 0 0 6 25 41 22 5 4 2 0 Total 82 31 0 Hours of calm in this stability class: 0 0 0 113 0 1 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability classes: 3 85 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October -December 2007 Stability Class -Extremely Unstable -316Ft-33Ft Delta-T (F)Winds Measured at 320 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 0 0 0 0 0 0 0 0 0 0 0 0 1 1 3 6 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 NW Variable Total 0 0 0 12 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: 3 86 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Stability Period of Record: October -December 2007 Class -Moderately Unstable -316Ft-33Ft Winds Measured at 320 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 1-3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 0 0 0 0 0 0 2 2 2 7 5 0 2 2 0 1 0 2 0 0 0 0 0 0 0 0 0 0 Variable Total 0 9 12 4 0 0 25 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 87 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October -December 2007 Stability Class -Slightly Unstable -316Ft-33Ft Delta-T (F)Winds Measured at 320 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW 1-3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4-7 8-12 13-18 19-24> 24 Total 0 0 0 0 4 6 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0 3 4 6 6 9 5 1 0 1 2 1 4 0 Variable Total 0 15 27 8 2 0 52 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: 3 88 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October -December 2007 Stability Class -Neutral -316Ft-33Ft winds Measured at 320 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 9 6 12 15 29 12 14 13 17 14 13 9 5 4 4 6 0 10 16 22 27 16 12 16 12 23 14 11 12 13 16 22 16 0 9 9 5 15 3 5 11 9 32 6 1 5 12 18 31 54 0 1 0 0 0 0 0 1 0 1 3 0 6 12 24 31 14 0 0 0 0 0 0 0 0 1 3 2 0 0 26 31 10 0 0 31 32 39 58 50 33 45 35 79 39 25 32 70 94 99 92 0 Total 22 182 258 225 93 73 853 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class:.0 Hours of missing stability measurements in all stability classes: 3 89 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October -December 2007 Stability Class -Slightly Stable -316Ft-33Ft Winds Measured at 320 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 5 13 7. 1 NNE NE ENE 4 10 12 15 1 8 6 E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 4 15 17 2 29 21 1 23 15 6 34 13 2 2 7 2 9 0 0 0 0 0 1 3 4 3 1 4 1 29 39 20 5 24 67 41 6 15 22 17 4 12 15 11 2 12 10 14 1 29 0 41 0 17 0 38 0 59 0 41 0 63 0 92 1 142 1 64 0 43 1 43 1 83 5 84 0 97 1 60 3 11 13 35 20 4 7 11 34 23 3 6 26 50 12 2 10 31 15 1 0 0 0 0 331 0 281 0 0 50 250 73 11 996 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 1 stability class: all stability cl 0 asses: 3 90 FacilitY Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Stability Period of Record: October -December 2007 Class -Moderately Stable -316Ft-33Ft Winds Measured at 320 Feet Delta-T (F)Wind Direction N NNE NE ENE E ESE SE SSE Wind Speed (in mph)1-3 4-7 8-12 13-18 19-24 > 24 Total'0 0 1 0 0 2 3 1 1 0 0 1 6 4 2 3 4 2 3 2 0 0 2 1 7 2 0 0 2 0 0 0 0 1 2 0 0 1 S SSW SW WSW 1 10 0 0 0 0 0 0 0 0 1 2 0 0 1 1 1 0 0 6 0 0 0 0 0 0 0 0 4 3 6 6 8 7 5 4 0 19 0 12 1 2 7 4 1 3 0 7 1 9 11 7 21 W WNW NW NNW Variable Total 2 2 3 1 0 5 16 13 5 5 0 1 9 0 0 22 0 34 0 37 0 14 0 17 4 2 0 0 0 20 57 65 57 0 205 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabi lity class: 0 Hours of missing stability measurements in all stability classes: 3 91 Facility:

Peach Bottom Units 2 & 3 Licensee:

Exelon Generation Company, CC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October -December 2007 Stability Class -Extremely Stable -316Ft-33Ft Winds Measured at 320 Feet Delta-T (F)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 0 0 0 0 0 0 0 0 0 0 0 3 1 1 0 4 0 1 1 6 4 2 0 10 0 12 0 1 1 0 0 2 0 3 0 0 2 3 0 4 0 8 2 0 0 0 0 0 0 0 0 1 0 0 0 0 6 4 4 0 11 13 21 13 0 59 Hours of calm in Hours of missing Hours of missing this stability class: 0 wind measurements in this stabi stability measurements in all s lity class: tability cl 0 asses: 3 92