Text

Independent Spent Fuel Storage Installation - Annual Radioactive Effluent Release Report 54, January 1, 2011 Through December 31, 2011
	ML12121A570
Person / Time
Site:	Peach Bottom
Issue date:	04/27/2012
From:	Stathes G; Exelon Nuclear
To:	; Document Control Desk, NRC/FSME
References
	Download: ML12121A570 (87)
	v • d • e

Peach Bottom Atomic Power Station www.exeloncorp.com Exelan.

1848 Lay Road Nuclear Delta, PA 17314 April 27, 2012 U. S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555-0001

Subject:

Peach Bottom Atomic Power Station Units 2 and 3 Independent Spent Fuel Storage Installation (ISFSI)

Facility Operating License DPR-12, DPR-44 and DPR-56 NRC Docket 50-171, 50-277 and 50-278 and ISFSI Docket 72-29 Annual Radioactive Effluent Release Report 54 January 1, 2011 through December 31, 2011 Enclosed is the Annual Radioactive Effluent Release Report 54, January 1, 2011, through December 31, 2011, for Peach Bottom Atomic Power Station Units 2 and 3.

This report is being submitted in compliance with 10CFR50.36a (2) and the Technical Specifications of Operating Licenses DPR-44 and DPR-56, and to fulfill the requirements of ODCM 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 was no revision made to the ODCM for the 2011 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.

Sincerely,

'Garey't. Stathes, Plant Manager Peach Bottom Atomic Power Station GLS/RJFIGRS/EAS/bcb Enclosure (2) ccn 12-36 cc: William Dean, Administrator, Region I, USNRC G. F. Wunder, Project Manager, USNRC 1wa->1 S. Hansell, USNRC Senior Resident Inspector, PBAPS A4

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. 54 JANUARY 1, 2011 THROUGH DECEMBER 31, 2011 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 Supplemental Information 2 Regulatory Limits 3 Maximum Permissible Concentrations 4 Average Energy 4 Measurements and Approximations of Total Radioactivity 4 Batch Releases 6 Average Stream Flow 7 Abnormal Releases 7 Changes to ODCM 9 Minimum Detectable Concentrations 9 Violations 10 Dose Assessment 10 Effluent Summary 11 Gaseous Effluents - Summation of All Releases 12 Gaseous Effluents for Elevated Release Point - Main Stack 13 Gaseous Effluents for Ground Level Release Points - 14 Unit 2 and Unit 3 Roof Vents & Aux Boiler Stack Liquid Effluents - Summation of All Releases 15 Liquid Effluents Release Points - Liquid Radwaste, RHR Leaks, 16 And Tritium Leaks Solid Waste and Irradiated Fuel Shipments 17 Solid Waste Shipped 18 Irradiated Fuel Shipments 19 Changes to Process Control Program (PCP) 19 Radiological Impact on Man 20 Radiological Impact on Man 21 40 CFR 190 Doses 21 Liquid and Gaseous Effluent Radiation Monitors and 21 Instrumentation Meteorological Data 22 Appendix A ERRATA Data Section 79 Technical Concurrences: (for accuracy of information)

/ ,4 - ( -

hemistry/Radwaste Manager Date

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC I 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 (PBAPS) Units 2 and 3 for the period January 1, 2011 through December 31, 2011. 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 (ODCMS) limits.

There were two (2) unplanned releases of liquid radioactive material. One release was from a Residual Heat Removal (RHR) heat exchanger, while the other was from a groundwater tritium plume.

There was one (1) unplanned gaseous release during the Unit 3 18 th Refueling Outage.

The maximum calculated organ dose (Bone) from iodines, tritium, carbon-14 (C-14) and particulates to any individual due to gaseous effluents was 5.50E-01 mrem, which was approximately 1.85E+00 percent of the annual limit. The large increase in organ dose from gaseous effluents compared to previous years was due to C-14. The maximum calculated gamma air dose in the UNRESTRICTED Area due to noble gas effluents was 2.18E-01 mrad, which was 1.09E+00 percent of the annual limit.

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" in 2011.

There were changes needed for the 2010 Effluent Report involving dose Re-calculation (Appendix A).

There were no changes made to the ODCM during the 2011 reporting period. As a result, Appendix B is left intentionally blank.

Exelon Nuclear common procedures, which provide consistent expectations and standards for Radioactive Effluents Controls Program (RECP), were used to generate this report. They are:

CY-AA-1 70-000, 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-1 70-300, Offsite Dose Calculation Manual Administration

CY-AA-1 70-2000, Annual Radioactive Effluent Release Report

CY-AA-1 70-2100, Estimated Errors of Effluent Measurement

CY-AA-170-3100, Offsite Dose Calculation Manual Revisions 1

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Attachment 1 Supplemental Information 2

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC 11 Regulatory Limits A Noble Gases

1) < 500 mrem/Yr - total body ODCMS 3.8.C.1 .a

< 3000 mrem/Yr - skin

2) < 10 mrad - air gamma quarterly air dose limits

< 20 mrad - air beta ODCMS 3.8.C.2.a and b

3) <20 mrad - air gamma yearly air dose limits

< 40 mrad - air beta ODCMS 3.8.C.2.c and d B lodines, Tritium, Particulates with Half Life > 8 days:

1) < 1500 mrem/Yr -any organ ODCMS 3.8.C.1.b

2) < 15 mrem -any organ quarterly dose limits ODCMS 3.8.C.3.a

3) < 30 mrem -any organ yearly dose limits ODCMS 3.8.C.3.b C Liquid Effluents

1) Concentration < 10 times 10 CFR 20, ODCMS 3.8.B.1.a Appendix B, Table 2, Col. 2

2) < 3.0 mrem - total body quarterly dose limits

< 10 mrem - any organ ODCMS 3.8.B.2.a

3) < 6.0 mrem - total body yearly dose limits

< 20 mrem - any organ ODCMS 3.8.B.2.b D 40 CFR 190 and 10 CFR 72.104 (Annual Dose Equivalent)

< 25 mrem - total body - ODCMS 3.8.D.1 .a

< 75 mrem - thyroid ODCMS 3.8.D.1 .b

< 25 mrem - any other organ - ODCMS 3.8.D.1 .c

<3.0 mrem - from liquid and - ODCMS 3.8.D.1 .d gaseous effluent

< 55 mrem - thyroid from gases- ODCMS 3.8.D.1.e 3

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC III 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.1 .a. and 3.8.C.1 .b.

The Effluent Concentrations Limits (ECL) specified in 10 CFR 20, Appendix B, Table 2, Column 2 and multiplied by 10, for identified nuclides, are used to calculate permissible release rates and concentrations for liquid release per ODCMS 3.8.B.1.

The total activity concentration for all dissolved or entrained gases is limited to

< 2E-04 jICi/ml (ODCMS 3.8.B.1 .b).

IV Average Energy The PBAPS 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, Revision 1, "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 PBAPS.

V 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 weekly to determine the isotopic mixture of noble gas activity released for the week.

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 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.

4

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC 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 analyses of strontium-89 (Sr-89), strontium-90 (Sr-90) and gross alpha.

D Carbon-14 (C-14)

The amount of C-14 (Ci) released was estimated using the guidance from EPRI Technical Report 1021106, Estimation of Carbon-14 in Nuclear Power Plant Gaseous Effluents. The C-14 was released primarily through the stack (97%)

with a small amount (3%) through the plant vents. The effluent in liquid effluents was determined to not be significant. The resulting annual dose to a child from gaseous releases was 5.49E-01 mrem to the bone.

E 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 are analyzed for tritium on-site and submitted to an offsite vendor laboratory for analyses of iron-55 (Fe-55),

phosphorus-32 (P-32), Sr-89, Sr-90 and gross alpha.

About 900 gal of water from PBAPS Unit 1 that were contaminated with tritium (0.01 Ci) were transported to Units 2 & 3 radwaste system and discharged through the laundry drain system as normal discharges. The dose contributions and isotope quantities from the releases were added to this Radioactive Effluent Release Report for the applicable reporting periods.

F Estimated Total Error Present 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.

5

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC VI Batch Releases:

A Liquid QTR 1 QTR 2 QTR 3 QTR 4 Number of batch releases: 12 0 7 11 Total Time for batch releases (minutes) 1689 0 2605 1409 Maximum time period for batch release 300 0 550 280 (minutes):

Average time period for batch release 140.75 0 372.14 128.09 (minutes):

Minimum time period for batch release 20 0 85 45 (minutes):

Average Stream Flow

46.88 N/A 33.19 41.51 Dilution volume (liters): 4.83E+09 0 7.03E+09 5.64E+09

Stream flow not used for dose calculations B Gaseous QTR 1 QTR 2 QTR 3 QTR 4 Number of batch releases: 0 0 1 0 Total Time for batch releases (minutes) 0 0 60 0 Maximum time period for batch release 0 0 60 0 (minutes):

Average time period for batch release 0 0 60 0 (minutes):

Minimum time period for batch release 0 0 60 0 (minutes):

6

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC VII 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.

VIII Abnormal Releases: Three (3) abnormal release sources A Liquid

1) Event description - 3A RHR to High Pressure Service Water (HPSW) leak On 04/08/2008, routine sampling of the HPSW effluent to the discharge canal detected low-level radioactive contamination. Subsequent investigation determined that primary coolant water was leaking through the Unit 3A RHR heat exchanger into the 3A loop of the HPSW system. The 3A RHR ceased to be a source of contamination as the leak was repaired sucessfully on September 23, 2011. The leak rate ranged from was 0.0003 GPM to 0.0075 GPM throughout the year. Refer to Issue Report (IR) 694879 and Action Request (AR) Al 63809.

Analysis of Releases It was estimated that the contaminated water released to the discharge canal for all of 2011 was responsible for 4.99E-05 mrem total body dose (Adult), and 6.93E-05 mrem Critical Organ (Child Liver) 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 analyses of Fe-55, P-32, Sr-89, Sr-90 and gross alpha. The dose contributions and isotope quantities from the releases were added to this Radioactive Effluent Release Report for the applicable reporting periods.

7

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC

2) Event description - Ground Water Plume During 2011, during the sampling and analysis 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 be discharged into the intake or 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 concentration ranging from 1.10E-05 uCi/mI to 3.OOE-04 uCi/mI, the ground water released to the discharge canal was responsible for 9.68E-05 mrem total body dose (Child), and 9.68E-05 mrem Critical Organ dose (Child Liver). This dose contribution was well below the limits specified in the ODCM.

8

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC B Gaseous

1) Event Description - Momentary ventilation shift with building hole in wall for outage work During the 1 8 th refueling outage of Unit 3, the turbine building wall was opened to allow for the passage of large equipment into the building. With this opening, air samples were taken continuously. A radiation protection contract employee monitoring the openning reported that a momentary shift in ventilation occurred. Particulate and iodine monitoring was continuous for the time the opening existed.

Analysis of Releases Since the exact time of the release, the duration and flow rate were not known, appropriate assumptions were employed in the calculation. Since the time of the release was not known, the radioactive release, if any, could not be identified for that exact period of time. Using all scans for the duration of the opening (filters were changed weekly and analyzed), the maximum activity observed was cohsidered conservative for that momnent.

Next, since the duration of the momentary shift was not known exactly (but probably less than 1 minute), six weeks was assumed as the release duration. Last, since the positive flow rate could not be measured, the default assumption of 250,000 cfm was used (which is a gross over-estimate of flow rate).

With all of these assumptions, the highest dose was found to be 6.OOE-03 mrem for the infant lung receptor. This is negligible compared to normal releases and discharges.

IX Changes to the ODCM No changes to the ODCM were made in 2011.

X 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 ODCMS Table 4.8.B.1, "Radioactive Liquid Waste Sampling and Analysis". In all cases, the LLD requirements were satisfied.

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Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC 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 OCDMS 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.

Xl Violations There were no violations for the 2011 reporting period.

XII Dose Assesment Liquid doses were calculated using the LADTAP function of NRCDOSE for Windows. The average river flow for 2011 of 75,640 cubic feet per second was used for the dose calculations. The maximum annual doses were 3.72-06 mrem to the child total body and 7.17E-06 mrem to the child bone. These doses were less than the doses calculated in accordance with the ODCM.

Gaseous doses were calculated using the GASPAR function of NRCDOSE for Windows. The average meteorology for 2011 was used to calculate the doses for noble gases and iodine-131 (1-131), iodine-133 (1-133), tritium, C-14 and particulates. The doses were calculated for three potential nearest MEMBER OF THE PUBLIC. The resident in the SSE sector at 1148 meters was found to be the limiting MEMBER OF THE PUBLIC. The maximum annual doses were 2.86E-01 mrem to the child bone, 2.49E-01 mrad gamma air dose, 1.95E-01 mrad beta air dose. These doses were less than the doses calculated in accordance with the ODCM.

10

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Attachment 2 Effluent Summary 11

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC GASEOUS RELEASE Gaseous Effluents - Summary of All Releases Period: January 1. 2011 throunh December 31. 2011 Unit: Peach Bottom Est. Total A. Fission & Activation Gases Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Error %

1. Total Release Ci 1.34E+02 1.52E+02 1.37E+02 1.53E+02 3.51E+01

2. Average release For the Period uCi/ s 1.72E+01 1.93E+01 1.73E+01 1.92E+01

3. Gamma Air Dose mrad 5.29E-02 5.64E-02 4.99E-02 5.91 E-02

4. Beta Air Dose mrad 3.61 E-02 3.83E-02 3.43E-02 4.03E-02

5. Percent of ODCM limit Gamma Air Dose % 5.27E-01 5.61 E-01 4.96E-01 5.89E-01 Beta Air Dose % 1 .79E-01 1.89E-01 1.68E-01 2.OOE-01 B. lodines

1. Total 1-131 Ci 1.18E-04 2.07E-04 5.28E-04 1.16E-04 1.

2. Average release For the Period uCi/ s 1.51 E-05 2.64E-05 6.64E-05 1.46E-05

3. Percent of ODCM limit % . [..

C. Particulate

1. Particulates with T1/2 > 8 days Ci 8.89E-05 7.84E-05 1.41 E-04 1.36E-04 1.94E+01

2. Average release For the Period uCi/s 1.14E-05 9.97E-06 1.78E-05 1.71 E-05

3. Percent of ODCM limit % ....

D. Tritium

1. Total Release Ci 1.10E+01 1.55E+01 2.20E+01 8.63E+00I 1.11E+01

2. Average release For the Period uCi/ s 1.42E+00 1.97E+00 2.76E+00 1.09E+001

3. Percent of ODCM limit % ....

E. Gross Alpha

1. Total Release Ci <LLD <LLD <LLD <LLD 4.OOE+02

2. Average release For the Period uCi/ s <LLD <LLD <LLD <LLD

3. Percent of ODCM limit % . ...

F. Carbon-14 1i.Total Release I Ci I8.87E+00 8.87E+00 8.87E+00 8.87E+OQ

2. Average release For the Period uCi/s 1.14E+00 1.13E+00 1.12E+00 1.12E+00OI G. Iodine 131 & 133, Tritium, Carbon-14 & Particulate I1. Organ Dose I mrem I1.38E-01 1.38E-01 1.38E-01 1.38E-01

12. Percent ODCM limit % 9.20E-01 9.20E-01 9.20E-01 9.20E-01

ODCM Limit is for combined Iodine, Tritium, Carbon-14 and particulate only, which is shown in Item G.

12

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Gaseous Release Point: Elevated Release Period, January 1, 2011 through December 31, 2011 Unit: Peach Bottom Nuclides Released Continuous Mode Batch Mode

1. Fission Gases Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Quarter 1 Quarter 2 Quarter 3 Quarter 4 Kr-85 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Kr-85m Ci <LLD <LLD 4.35E-01 <LLD <LLD <LLD <LLD <LLD Kr-87 Ci 7.97E-01 <LLD <LLD <LLD <LLD <LLD <LLD <LLD Kr-88 Ci <LLD <LLD 1.05E+00 <LLD <LLD <LLD <LLD <LLD Xe-133 Ci <LLD 7.59E-01 7.78E-01 <LLD <LLD <LLD <LLD <LLD Xe-135 Ci 4.14E+00 1.80E+00 9.59E-01 1.08E+00 <LLD <LLD <LLD <LLD Xe-135m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Xe-138 Ci <LLD <LLD 2.15E+00 <LLD <LLD <LLD <LLD <LLD Ar-41 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Unidentified Ci 1.02E+01 1.76E+01 2.02E+01 1.85E+01 <LLD <LLD <LLD <LLD Total For Period Ci 1.51 E+01 2.01 E+01 2.55E+01 1.95E+01 <LLD <LLD <LLD <LLD

2. lodines _ _ _i_,_,__ _

1-131 Ci 6.48E-05 8.46E-05 1.24E-04 9.99E-05 <LLD <LLD <LLD <LLD 1-133 Ci 1.38E-04 2.81E-04 3.64E-04 2.07E-04 <LLD <LLD <LLD <LLD 1-135 Ci <LLD 5.24E-05 1.17E-04 <LLD <LLD <LLD <LLD <LLD Total For Period Ci 2.02E-04 4.18E-04 6.04E-04 3.07E-04 <LLD <LLD <LLD <LLD

3. Particulates ________ _ ,> "

Sr-89 Ci 5.86E-05 5.31E-05 4.39E-05 3.82E-05 <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ba-140 Ci 2.78E-05 8.99E-06 1.21E-05 9.51E-06 <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cr-51 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD 7.43E-07 <LLD <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD 6.77E-07 <LLD <LLD <LLD <LLD Co-60 Ci 2.56E-06 1.45E-05 3.82E-05 2.26E-05 <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ag-110m Ci <LLD <LLD <LLD 1.83E-06 <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ce-144 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Co-57 Ci <LLD <LLD 1.16E-07 <LLD <LLD <LLD <LLD <LLD Zn-65 Ci <LLD 1.75E-06 1.15E-05 7.47E-06 <LLD <LLD <LLD <LLD Ru-103 Ci <LLD <LLD <LLD 2.22E-07 <LLD <LLD <LLD <LLD Total For Period Ci 8.89E-05 7.84E-05 1.07E-04 8.05E-05 <LLD <LLD <LLD <LLD

4. Tritium ** * ** *' ...........

H-3 - Ci 1.75E-01 5.98E-01 2.27E+00 5,86E-01 <LLD <LLD <LLD <LLD

5. Gross Alpha I I____

Gross Alpha Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD

6. Carbon-14 . I C-14 Ci 8.61E+00 8.61E+00 8.61E+00 8.61E+00 <LLD <LLD <LLD <LLD 13

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Gaseous Release Point: Ground Level Releases Period: January 1, 2011 through December 31, 2011 Unit: Peach Bottom Nuclides Released Continuous Mode Batch Mode

1. Fission Gases Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Quarter 1 Quarter 2 Quarter 3 Quarter 4 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-138 Ci <LLD 9.90E+00 <LLD <LLD <LLD <LLD <LLD <LLD Ar-41 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Unidentified Ci 1.19E+02 1.22E+02 1.12E+02 1.33E+02 <LLD <LLD <LLD <LLD Total For Period Ci 1.19E+02 1.32E+02 1.12E+02 1.33E+02 <LLD <LLD <LLD <LLD

2. lodines _______ _ _i_____

1-131 Ci 5.29E-05 1.23E-04 4.04E-04 1.59E-05 <LLD <LLD <LLD <LLD 1-133 Ci <LLD 2.46E-04 5.37E-04 3.43E-05 <LLD <LLD <LLD <LLD 1-135 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Total For Period Ci 5.29E-05 3.68E-04 9.41E-04 5.02E-05 <LLD <LLD <LLD <LLD

3. Particulates _ _ _____ _.. __ _____

Sr-89 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs-137 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cr-51 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Mn-54 Ci <LLD <LLD <LLD 4.12E-06 <LLD <LLD <LLD <LLD Co-58 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Co-60 Ci <LLD <LLD 1.40E-05 5.09E-05 <LLD <LLD 1.33E-08 <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-144 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Fe-59 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Co-57 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Zn-65 Ci <LLD <LLD 2.08E-05 <LLD <LLD <LLD 7.80E-09 <LLD Ru-103 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Total For Period Ci <LLD <LLD 3.48E-05 5.50E-05 <LLD <LLD 2.11 E-08 <LLD

4. Tritium _ . '

H-3 Ci 1.08E+01 1.49E+01 1 .97E+01 8.04E+00 <LLD <LLD <LLD <LLD

5. Gross Alpha *, \ _________ ___

Gross Alpha Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD

6. Carbon-14 _ ____,__,__ .... iT ..

C-14 Ci 2.66E-01 2.66E-01 2.66E-01 2.66E-01 <LLD <LLD <LLD <LLD 14

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC LIQUID EFFLUENTS Liquid Effluents - Summary of All Liquid Radwaste Releases Period: Jannuary 1. 2011 to December 31.- 2011 Unit: Peach Bottom Est. Total A. Fission & Activation Gases Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Error %

1. Total Release (not including tritium, gases & alpha) Ci 4.61 E-05 3.96E-05 6.42E-05 <LLD 2.11 E+01

2. Average diluted concentration for the Period pCi/mL 9.77E-14 5.92E-14 1.02E-13 <LLD

3. Percent of applicable limit Total Body Dose % 3.18E-03 7.33E-03 1.38E-03 1.12E-03 Organ Dose % 1.20E-03 2.92E-04 4.25E-04 3.35E-04 Est. Total B. Tritium Error %

1. Total Release Ci 6.79E+00 2.32E+00 3.35E+00 3.24E+00 6.40E+00

2. Average diluted concentration for the Period ijCi/ mL 1.44E-08 3.48E-09 5.32E-09 5.04E-09

3. Percent of applicable limit % 1.44E-04 3.48E-05 5.32E-05 5.04E-05 (10x 10CFR20 Limit of 1.OOE-03 uCi/mL; ODCMS 3.8.B.1.a)

Est. Total C. Dissolved & Entrained Gases Error %

1. Total Release Ci 1.95E-05 <LLD 1.58E-06 <LLD 2.11 E+01

2. Average diluted concentration for the Period pCi/mL 4.13E-14 <LLD 2.51E-15 <LLD

13. Percent of ODCM limit % 2.07E-08 <LLD 1.25E-09 <LLD Est. Total D. Gross Alpha Activity Error %

1.Total Release Ci <LLD I 4.42E-08 3.22E-08 <LLD 2.30E+01 (prior to dilution)

E. Volume of Waste Released ILiters I0.6, +0718.68E+0718.81E+0710.0+

Water lF. Volume of Dilution Used During Period I Liters 15

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Abnormal and Radwaste Releases Period: January 1,2011 through December 13, 2011 Unit: Peach Bottom Nuclides Released Continuous Mode Batch Mode Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 Quarter 1 Quarter 2 Quarter 3 Quarter 4 Sr-89 Ci <LLD <LLD <LLD <LLD 1.10E-07 <LLD <LLD <LLD Sr-90 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs-134 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Cs-137 Ci 4.94E-06 4.44E-06 5.1OE-07 <LLD 3.57E-06 <LLD <LLD <LLD 1-131 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Co-58 Ci 4.58E-07 1.39E-07 1.77E-07 <LLD <LLD <LLD <LLD <LLD Co-60 Ci 1.54E-05 1.74E-05 3.40E-05 <LLD 5.15E-06 <LLD 1.90E-05 <LLD Fe-59 Ci <LLD <LLD 2.36E-07 <LLD <LLD <LLD <LLD <LLD Zn-65 Ci 4.65E-06 1.99E-06 2.42E-06 <LLD <LLD <LLD <LLD <LLD Mn-54 Ci 4.o0E-06 2.64E-06 3.90E-06 <LLD 2.80E-07 <LLD <LLD <LLD Cr-51 Ci 5.72E-07 1.24E-07 1.45E-06 <LLD <LLD <LLD <LLD <LLD Zr-95 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Nb-95 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Mo-99 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Tc-99m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ba-140 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD La-140 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ce-141 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Ag-110m Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Fe-55 Ci 6.37E-06 1.28E-05 2.47E-06 <LLD <LLD <LLD <LLD <LLD H-3 Ci 5.80E+00 2.32E+00 2.43E+00 2.60E+00 9.97E-01 <LLD 9.21E-01 6.49E-01 P-32 Ci <LLD <LLD <LLD <LLD 6.26E-07 <LLD <LLD <LLD Total for Period Ci 5.80E+00 2.32E+00 2.43E+00 2.60E+00 9.97E-01 <LLD 9.21E-01 6.49E-01 Xe-133 Ci <LLD <LLD <LLD <LLD <LLD <LLD <LLD <LLD Xe-135 Ci <LLD <LLD <LLD <LLD 1.95E-05 <LLD 1.58E-06 <LLD Gross Alpha Ci <LLD 4.42E-08 3.22E-08 <LLD <LLD <LLD <LLD <LLD 16

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Attachment 3 Solid Waste and Irradiated Fuel Shipments 17

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC A. Solid Waste Shipped Offsite for Burial or Disposal (Not irradiated fuel)

1. Types of Waste Total Total Period Est. Total Quantity Activity Error %

1. Types of Waste (M3) (Ci)

a. Spent resin, filters, sludges, evaporator bottoms, etc 1.04E+02 1.98E+02 2011 2.50E+01

b. Dry compressible waste, contaminated equipment, etc. 2.29E+03 7.78E+00 2011 2.50E+01

c. Irradiated components, control rods, etc. N/A N/A 2011 N/A

d. Other -oil 1.14E+01 4.74E-06 2011 2.50E+01 Estimate of major nuclide composition (by waste type)

a. Spent resin, filters, sludges, e aporator bottoms, etc Major Nuclide Class "A"Waste Composition ci Percent H-3 3.71 E-02 1.87E-02 C-14 1.31E+00 6.61E-01 Cr-51 1.61 E-06 8.12E-07 Mn-54 6.13E+00 3.09E+00 Fe-55 4.03E+01 2.03E+01 Fe-59 8.42E-07 4.25E-07 Co-57 5.33E-03 2.69E-03 Co-58 3.51 E-01 1.77E-01 Co-60 1.14E+02 5.75E+01 Ni-63 4.74E+00 2.39E+00 Zn-65 8.30E+00 4.19E+00 Sr-89 3.24E-02 1.63E-02 Sr-90 7.57E-02 3.82E-02 Zr-95 1.45E-06 7.31 E-07 Tc-99 2.62E-02 1.32E-02 Ag-110m 6.66E-01 3.36E-01 Sb-124 6.17E-09 3.11E-09 1-129 O.OOE+00 O.OOE+00 1-131 5.04E-04 2.54E-04 Cs-134 1.71 E+00 8.63E-01 Cs-137 2.03E+01 1.02E+01 Ba-140 5.07E-03 2.56E-03 La-140 1.79E-14 9.03E-15 Ce-141 1.09E-02 5.50E-03 Ce-144 1.14E-01 5.75E-02 Pt-191 8.11E-44 4.09E-44 Hg-203 1.27E-08 6.41 E-09 Pu-238 9.67E-04 4.88E-04 Pu-239 7.97E-06 4.02E-06 Pu-241 1.12E-01 5.65E-02 Pu-242 O.OOE+00 O.OOE+00 Am-241 5.02E-04 2.53E-04 Cm-242 1.79E-04 9.03E-05 Cm-243 1.60E-03 8.07E-04 Cm-244 O.OOE+00 O.OOE+00 Totals 1.98E+02 1.OOE+02 18

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC

b. Dry compressible waste, contaminated equipment, etc Major Nuclide Composition Class "A"Waste Ci Percent H-3 4.96E-06 6.37E-05 C-14 8.68E-03 1.11E-01 Cr-51 4.48E-02 5.76E-01 Mn-54 2.45E-01 3.15E+00 Fe-55 2.13E+00 2.74E+01 Fe-59 1.98E-11 2.54E-10 Co-58 1.07E-02 1.38E-01 Co-60 4.1OE+00 5.27E+01 Ni-63 9.93E-02 1.28E+00 Zn-65 5.24E-01 6.73E+00 Sr-89 1.03E-03 1.32E-02 Sr-90 2.58E-03 3.31 E-02 Nb-95 2.27E-13 2.92E-12 Tc-99 2.21 E-04 2.84E-03 Ag-110m 4.37E-02 5.62E-01 Cs-134 2.22E-02 2.86E-01 Cs-137 4.12E-01 5.30E+00 Ba-137m 6.54E-02 8.40E-01 Ce-141 6.61 E-02 8.49E-01 Ce-144 6.53E-03 8.39E-02 Pu-238 1.02E-05 1.31 E-04 Pu-241 9.91 E-04 1.27E-02 Am-241 4.97E-06 6.38E-05 Cm-242 2.88E-06 3.70E-05 Cm-243 1.75E-05 2.25E-04 Totals 7.78E+00 1.OOE+02

c. Irradiated components, control rods, etc No Irradiated components, control rods, etc. shipped

d. Other - Oil Class "A*Waste Major Nuclide Composition Ci Percent Co-60 1.36E-06 2.87E+01 Cs-137 1.12E-06 2.36E+01 Ce-144 2.26E-06 4.77E+01 Totals 4.74E-06 1.00E+02 B. Irradiated Fuel Shipments (disposition)

No shipment of irradiated fuel was made during the reporting period of 2011.

C. Changes to the Process Control Program There were no changes made to the RW-AA-100 "Process Control Program for Radioactive Waste" in 2011.

19

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Attachment 4 Radiological Impact on Man 20

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC

1. Radiological Impact on Man The following table is a summary of gaseous and liquid radiation annual doses to MEMBERS OF THE PUBLIC as calculated by the ODCM.

Location % of Applicable Estimated Distance Direction Applicable Effluent Organ Dose Age Group (meters) (toward) Limit Limit Unit Noble Gas Gamma-Air 2.18E-01 All 1.1OE+03 SSE 1.09E+00 2.OOE+01 mrad Dose Beta - Air Noble Gas 1.49E-01 All 1.10E+03 SSE 3.72E-01 4.00E+01 mrad Noble Gas Total Body 2.11E-01 All 1.10E+03 SSE 2.11E+00 1.OOE+01 mrem (gamma)

Noble Gas Skin (Beta) 2.76E-01 All 1.10E+03 SSE 9.20E-01 3.00E+01 mrem Iodine, Particulate, Bone 5.49E-01 Child 1.10E+03 SSE 1.83E+00 3.OOE+01 Carbon-14 & mrem Tritium Iodine, Particulate, Thyroid 1.17E-01 Child 1.1OE+03 SSE 3.90E-01 3.OOE+01 Carbon- 14 & mrem Tritium Liquid Total Body 1.92E-04 Adult 3.20E-03 6.OOE+00 mrem (gamma) Site Boundary Liquid Liver 2.25E-04 Child 1.13E-03 2.OOE+01 mrem Direct Radiation Total Body 3.OOE-01 All 1.15E+03 SSE 1.36E+00 2.20E+01 mrem 40 CFR Part 190 Compliance Total Dose Total Body 5.18E-01 All 1.15E+03 SSE 2.07E+00 2.50E+01 mrem Total Dose Thyroid 6.35E-01 All 1.15E+03 SSE 8.47E-01 7.50E+01 mrem Total Dose Bone 1.07E+00 All 1.15E+03 SSE 4.27E+00 2.50E+01 mrem Total Dose Total Body 2.18E-01 All 1.15E+03 SSE 7.28E+00 3.OOE+00 mrem Total Dose Bone 7.67E-01 All 1.15E+03 SSE 2.56E+01 3.OOE+00 mrem Total Dose Thyroid 3.35E-01 All 1.15E+03 SSE 6.10E-01 5.50E+01 mrem Doses calculated were well below all ODCM limits.

2. 40 CFR 190 Doses The annual dose equivalent to a real individual who is located beyond the SITE BOUNDARY from all uranium fuel cycle sources within 8 kilometers were well below 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.

21

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Attachment 5 Meteorological Data 22

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January - March 2011 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 1 9 0 0 0 0 10 NNE 4 3 0 0 0 0 7 NE 9 2 0 0 0 0 11 ENE 15 0 17 E 6 0 15 ESE 1 0 7 SE 0 0 1 SSE 0 0 1 S 0 0 3 SSW 0 0 5 SW 0 0 4 WSW 0 0 3 W 0 0 4 WNW 0 0 5 NW 1 0 16 NNW 0 19 22 0 0 0 41 Variable 0 0 0 0 0 0 0 Total 37 68 44 1 0 0 150 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 20 23

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January - March 2011 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 4 0 4 NNE 2 0 8 NE 2 0 9 ENE 0 0 4 E 0 0 2 ESE 0 0 2 SE 1 0 2 SSE 5 0 5 S 6 3 11 SSW 3 0 3 SW 3 2 5 WSW 2 1 3 W 2 2 6 WNW 12 7 20 NW 13 29 43 NNW 18 9 27 Variable 0 0 0 Total 22 73 53 6 0 0 154 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 20 24

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January - March 2011 Stability Class - Slightly 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 0 0 3 NNE 2 0 2 NE 0 0 0 ENE 5 0 5 E 3 0 3 ESE 0 0 1 SE 0 0 1 SSE 0 0 5 S 0 0 3 SSW 0 0 0 SW 0 0 3 WSW 0 0 0 W 0 0 2 0 11 8 5 0 0 24 NW 1 4 13 4 0 0 22 NNW 0 8 2 0 0 0 10 Variable 0 0 0 0 0 0 0 Total 11 34 28 11 0 0 84 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 20 25

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January - March 2011 Stability Class - Neutral - 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 10 33 9 0 52 NNE 40 15 1 0 56 NE 31 1 0 0 32 ENE 27 0 1 0 28 E 27 12 0 0 39 ESE 8 8 5 0 21 SE 11 42 23 1 77 SSE 8 34 11 2 55 S 2 15 9 1 27 SSW 2 5 5 0 12 SW 4 16 4 0 24 WSW 6 12 2 0 20 W 8 24 10 2 44 WNW 2 55 62 12 131 NW 12 50 78 32 172 NNW 8 36 32 2 78 Variable 0 0 0 0 0 Total 206 358 252 52 0 0 868 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 12 Hours of missing stability measurements in all stability classes: 20 26

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January - March 2011 Stability Class - Slightly 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 16 7 1 24 NNE 21 1 0 22 NE 17 0 0 17 ENE 22 1 0 23 E 26 4 0 30 ESE 23 14 7 44 SE 23 18 1 42 SSE 21 20 2 43 S 16 25 1 42 SSW 10 9 1 20 SW 14 18 1 33 WSW 17 24 3 44 W 21 53 14 89 WNW 16 80 10 109 NW 13 46 6 65 NNW 14 18 1 33 Variable 1 0 0 1 Total 291 338 48 4 0 0 681 Hours of calm in this stability class: 3 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 20 27

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January - March 2011 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 2 0 0 0 0 0 2 NNE 0 0 0 0 0 1 NE 4 0 0 0 0 0 4 ENE 2 0 0 0 0 0 2 E 17 0 0 0 0 0 17 ESE 8 0 0 0 0 0 8 SE 7 0 0 0 0 0 7 SSE 5 1 0 0 0 0 6 S 7 3 0 10 SSW 4 3 0 7 SW 12 1 0 13 WSW 11 9 0 20 W 14 6 0 20 WNW 7 1 0 8 NW 4 0 0 4 NNW 5 0 0 5 Variable 1 0 0 1 Total ill 24 0 135 Hours of calm in this stability class: 5 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 20 28

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January - March 2011 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 0 0 NNE 0 0 0 NE 1 0 1 ENE 1 0 1 E 4 0 4 ESE 2 0 2 SE 3 0 3 SSE 1 0 1 S 2 0 2 SSW 0 0 0 SW 2 0 2 WSW 14 0 15 W 7 0 7 WNW 4 0 4 NW 1 0 3 NNW 1 0 1 Variable 0 0 0 Total 43 3 0 0 0 0 46 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 20 29

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January - March 2011 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 0 1 0 0 0 0 1 NNE 0 2 2 0 0 0 4 NE 0 1 0 0 0 0 1 ENE 1 3 0 0 0 0 4 E 0 5 0 0 0 0 5 ESE 0 2 3 1 2 0 8 SE 0 10 SSE 0 0 S 0 0 SSW 0 0 SW 0 1 WSW 0 0 W 0 2 WNW 0 0 NW 0 0 NNW 0 0 Variable 0 0 Total 1 14 0 36 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 30

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January - March 2011 Stability Class - Moderately 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 0 0 2 NNE 0 0 0 NE 2 0 2 ENE 2 0 2 E 0 4 4 ESE 0 2 5 SE 0 0 1 SSE 0 0 0 S 0 0 2 SSW 0 0 7 SW 0 0 4 WSW 0 0 3 W 0 0 3 WNW 0 0 3 NW 0 1 8 NNW 0 2 9 13 0 0 24 Variable 0 0 0 0 0 0 0 Total 4 9 22 30 5 0 70 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 31

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January - March 2011 Stability Class - Slightly 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 3 0 3 NNE 0 0 0 NE 0 0 4 ENE 0 0 6 E 1 0 5 ESE 1 0 3 SE 1 0 1 SSE 1 0 1 S 4 2 9 SSW 1 0 1 SW 5 2 7 WSW 1 1 2 W 5 0 9 WNW 2 12 22 NW 4 13 25 NNW 12 15 30 Variable 0 0 0 Total 3 18 41 45 12 9 128 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 32

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January - March 2011 Stability Class - Neutral - 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 5 12 34 10 4 0 65 NNE 1 6 18 11 0 0 36 NE 6 19 26 7 0 0 58 ENE 10 17 12 0 1 0 40 E 2 14 22 4 0 0 42 ESE 4 12 18 15 16 4 69 SE 2 11 29 37 4 4 87 SSE 2 9 37 11 1 0 60 S 2 11 30 18 13 2 76 SSW 0 5 6 7 0 1 19 SW 0 3 22 8 1 0 34 WSW 1 4 4 8 5 1 23 W 0 6 18 21 12 15 72 WNW 0 10 31 81 63 36 221 NW 2 8 32 83 47 32 204 NNW 3 17 36 30 22 1 109 Variable 0 0 0 0 0 0 0 Total 40 164 375 351 189 96 1215 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 18 Hours of missing stability measurements in all stability classes: 7 33

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January - March 2011 Stability Class - Slightly 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 8 3 11 NNE 2 3 0 6 NE 2 2 0 4 ENE 14 1 0 18 E 5 2 0 8 ESE 7 8 0 21 SE 7 8 4 24 SSE 8 22 6 36 S 14 36 13 66 SSW 11 12 14 38 SW 5 16 16 41 WSW 4 9 8 27 W 7 13 34 63 WNW 3 19 33 57 NW 11 24 35 73 NNW 7 18 5 31 Variable 0 0 0 0 Total 17 107 201 171 19 9 524 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 10 Hours of missing stability measurements in all stability classes: 7 34

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January - March 2011 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 3 1 0 0 0 4 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 1 1 0 0 0 0 2 E 0 2 0 0 0 0 2 ESE 1 1 0 0 0 0 2 SE 0 2 0 0 0 0 2 SSE 0 3 6 0 0 0 9 S 2 11 9 1 0 23 SSW 0 12 8 4 0 24 SW 0 9 4 0 0 13 WSW 1 5 4 1 0 11 W 0 2 8 4 0 14 WNW 1 1 5 2 0 9 NW 0 5 4 0 0 9 NNW 0 2 7 0 0 9 Variable 0 0 0 0 0 0 Total 6 59 56 12 0 133 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 35

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: January - March 2011 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 0 1 0 0 1 NNE 0 0 0 1 NE 0 3 ENE 0 0 E 0 0 ESE 0 0 SE 0 0 SSE 0 2 S 0 2 SSW 0 0 SW 0 4 WSW 0 0 W 0 5 WNW 0 0 NW 0 0 NNW 0 1 Variable 0 0 Total I 9 10 3 0 0 19 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 36

Facility: Peach Bottom Units 2 & 3 Licehsee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April - June 2011 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 1 10 0 11 NNE 1 2 0 3 NE 4 4 0 8 ENE 4 1 0 5 E 10 5 0 15 ESE 7 7 0 14 SE 6 17 0 23 SSE 2 29 8 40 S 1 5 20 27 SSW 0 3 1 4 SW 1 0 2 4 WSW 0 0 3 4 W 0 0 1 1 WNW 0 5 7 12 NW 1 14 10 25 NNW 2 26 2 30 Variable 0 0 0 0 Total 40 128 54 4 0 0 226 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: 15 37

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April - June 2011 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 7 10 NNE 3 5 NE 0 9 ENE 0 6 E 0 4 ESE 2 6 SE 7 11 SSE 9 23 S 5 6 SSW 2 5 SW 0 1 WSW 2 4 W 4 6 WNW 4 11 NW 8 15 NNW 14 15 Var iablie 0 0 Total 37 67 29 4 0 0 137 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabili ty class: 0 Hours of missing stability measurements in all stability classes: 15 38

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April - June 2011 Stability Class - Slightly Unstable - 15OFt-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 1 0 5 NNE 2 0 3 NE 7 0 7 ENE 4 0 4 E 4 0 4 ESE 2 0 4 SE 1 0 4 SSE 2 0 14 S 0 0 8 SSW 0 0 2 SW 1 0 1 WSW 0 0 5 W 2 0 5 WNW 2 2 7 0 0 0 11 NW 0 3 4 0 0 0 7 0 4 1 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 28 39 22 0 0 0 89 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: 15 39

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April - June 2011 Stability Class - Neutral - 15OFt-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 18 20 1 39 NNE 21 5 0 26 NE 19 2 0 21 ENE 16 2 1 19 E 17 6 0 23 ESE 23 10 4 38

ýýs ý SE 9 68 4 84 SSE 15 42 19 83 S 9 18 10 37 SSW 9 12 2 23 SW 4 14 3 22 WSW 8 9 4 21 W 5 13 8 26 WNW 8 30 10 50 NW 15 33 10 58 NNW 16 31 1 48 Variable 0 0 0 0 Total 212 315 77 14 0 0 618 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stabili ty class: 0 Hours of missing stability measurements in all sta bility classes: 15 40

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April - June 2011 Stability Class - Slightly 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 19 11 0 30 NNE 19 5 0 24 NE 17 0 0 17 ENE 15 0 0 15 E 26 0 0 26 ESE 29 4 0 33 SE 47 33 0 80 SSE 37 41 12 90 S 32 13 8 54 SSW 15 5 1 21 SW 20 9 4 33 WSW 25 29 5 59 W 31 42 11 84 WNW 22 38 2 62 NW 35 37 5 77 NNW 17 32 0 49 Variable 3 0 0 3 Total 409 299 48 1 0 0 757 Hours of calm in this stability class: 14 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 15 41

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April - June 2011 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 0 0 0 0 N 4 0 4 0 0 0 0 NNE 3 0 3 0 0 0 0 NE 5 0 5 0 0 0 0 ENE 2 0 2 0 0 0 0 E 4 0 4 0 0 0 0 ESE 1 0 1 0 0 0 0 SE 6 2 8 0 0 0 0 SSE 2 0 2 0 0 0 0 S 8 0 8 0 0 0 0 SSW 17 2 19 0 0 0 0 SW 16 2 18 0 0 0 0 WSW 34 10 44 0 0 0 0 W 26 10 36 0 0 0 0 WNW 29 5 34 0 0 0 0 NW 14 7 21 0 0 0 0 NNW 6 1 7 0 0 0 0 Variable 0 0 0 Total 177 39 0 0 0 0 216 Hours of calm in this stability class: 12 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 15 42

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April - June 2011 Stability Class - Extremely Stable - 15OFt-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 0 0 0 0 N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 3 0 3 0 0 0 0 ENE 0 0 0 0 0 0 0 E 1 0 1 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 1 0 1 0 0 0 0 SSE 1 0 1 0 0 0 0 0 S 0 0 12 0 0 0 0 SSW 0 12 0 0 0 0 SW 18 4 22 0 0 0 0 WSW 24 4 28 0 0 0 0 W 15 1 16 0 0 0 0 WNW 10 0 10 0 0 0 0 NW 1 0 1 NNW 0 0 0 0 0 0 0 0 0 0 0 Variable 0 0 0 Total 86 9 0 0 0 0 95 Hours of calm in this stability class: 4 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 15 43

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April - June 2011 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 0 0 0 0 0 0 0 NNE 0 3 0 0 0 0 3 NE 1 2 1 1 0 0 5 ENE 0 1 0 0 0 0 1 E 0 8 3 0 0 11 ESE 0 1 11 3 0 16 SE 0 2 7 0 10 SSE 0 4 0 0 4 S 0 2 11 0 16 SSW 0 0 0 0 0 SW 0 0 2 2 4 WSW 0 0 0 0 1 W 0 0 0 0 0 WNW 0 0 3 0 4 NW 0 3 3 0 9 NNW 0 2 1 0 3 Variable 0 0 0 0 0 Total 1 17 28 31 8 2 87 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: 15 44

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April. - June 2011 Stability Class - Moderately 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 0 2 0 0 0 N 2 5 0 0 0 0 NNE 5 1 0 0 0 0 NE 2 2 1 0 0 0 ENE 6 4 1 0 1 0 E 7 3 1 0 0 0 ESE 4 SE 1 7 2 0 0 10 SSE 3 7 5 1 0 16 S 2 4 16 2 0 24 SSW 0 4 2 0 0 6 SW 0 0 0 0 1 1 WSW 0 0 1 1 0 2 W 0 0 0 1 0 1 WNW 0 0 5 1 0 6 NW 1 8 9 2 0 20 NNW 5 10 4 0 0 19 Variable 0 0 0 0 0 0 Total 5 27 45 44 9 1 131 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: 15 45

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April - June 2011 Stability Class - Slightly 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 0 9 2 0 0 0 11 NNE 1 5 0 0 0 0 6 NE 2 2 0 0 0 0 4 ENE 2 1 0 0 0 0 3 E 1 3 0 0 0 0 4 ESE 3 5 1 1 0 0 10 SE 0 1 9 2 0 0 12 SSE 0 2 10 11 2 0 25 S 0 1 4 2 2 0 9 SSW 0 3 4 1 0 0 8 SW 0 0 0 0 0 0 0 WSW 0 2 0 5 0 0 7 W 0 1 4 1 1 0 7 WNW 0 1 2 5 6 2 16 NW 0 0 13 5 3 0 21 NNW 0 4 9 2 0 0 15 Variable 0 0 0 0 0 0 0 Total 9 40 58 35 14 2 158 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: 15 46

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April - June 2011 Stability Class - Neutral - 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 17 6 7 0 35 NNE 10 13 3 0 28 NE 8 16 10 0 37 ENE 9 20 9 0 43 E 15 15 17 4 52 ESE 16 36 28 12 103 SE 15 59 21 3 104 SSE 11 36 18 4 71 S 7 32 32 26 105 SSW 12 19 7 2 42 SW 7 15 7 3 33 WSW 10 12 15 12 50 W 8 14 15 12 55 WNW 7 16 37 18 85 NW 17 33 37 11 101 NNW 18 17 18 1 57 Variable 0 0 0 0 0 Total 37 187 359 281 108 29 1001 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: 15 47

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April - June 2011 Stability Class - Slightly 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 10 9 12 2 35 NNE 9 5 2 0 19 NE 6 3 2 0 11 ENE 4 3 0 0 9 E 11 11 2 2 27 ESE 16 13 2 0 33 SE 8 18 3 0 30 SSE 16 17 7 0 40 S 10 27 8 6 51 SSW 13 21 5 0 42 SW 10 12 6 2 31 WSW 11 14 21 4 50 W 9 17 26 16 72 WNW 4 14 8 7 34 NW 10 18 22 4 55 NNW 7 15 16 2 43 Variable 0 0 0 0 0 Total 24 154 217 142 45 0 582 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: 15 48

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April - June 2011 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 1 1 4 1 0 0 7 NNE 2 3 2 0 0 0 7 NE 0 2 0 0 0 0 2 ENE 0 2 1 0 0 0 3 E 0 1 0 0 0 0 1 ESE 0 0 0 0 0 0 0 SE 1 2 1 0 0 0 4 SSE 0 2 0 0 0 0 2 S 0 2 5 0 0 0 7 SSW 1 11 8 1 0 0 21 SW 6 8 7 0 0 0 21 WSW 1 7 19 4 0 0 31 W 3 2 12 13 1 0 31 WNW 0 4 12 6 0 0 22 NW 2 5 7 2 0 0 16 NNW 2 4 2 2 0 0 10 Variable 1 0 0 0 0 0 1 Total 20 56 80 29 1 0 186 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: 15 49

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: April - June 2011 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

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 4 7 11 1 0 0 23 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: 15 50

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July - September 2011 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 1 3 0 0 0 0 4 NNE 4 1 0 0 0 0 5 NE 1 0 0 0 0 0 1 ENE 0 0 0 0 0 0 0 E 5 1 0 0 0 0 6 ESE 3 2 0 0 0 0 5 SE 4 5 1 0 0 0 10 SSE 3 24 0 29 S 2 9 0 12 SSW 1 6 0 7 SW 2 2 0 4 WSW 2 1 0 3 W 1 2 0 3 WNW 1 1 0 2 NW 2 1 0 3 NNW 1 7 0 8 Variable 0 0 0 0 Total 33 65 0 102 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 10 Hours of missing stability measurements in all stability classes: 22 51

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July - September 2011 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 0 6 0 0 0 0 6 NNE 5 1 0 0 0 0 6 NE 7 0 0 0 0 0 7 ENE 2 0 0 0 0 0 2 E 6 0 0 0 0 0 6 ESE 5 1 0 0 0 0 6 SE 1 3 1 0 0 0 5 SSE 1 14 0 0 0 20 S 1 4 0 0 0 5 SSW 1 0 0 0 0 1 SW 1 3 0 0 0 4 WSW 0 3 0 0 0 3 W 1 3 0 0 0 4 WNW 0 4 0 0 0 4 NW 0 3 0 0 0 3 NNW 2 18 0 0 0 20 Variable 0 0 0 0 0 0 Total 33 63 6 0 0 0 102 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabi lity class: 15 Hours of missing stability measurements in all s tability classes: 22 52

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July - September 2011 Stability Class - Slightly Unstable - 15OFt-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 3 7 0 0 0 0 10 NNE 3 0 0 0 0 0 3 NE 2 0 0 0 0 0 2 ENE 5 0 0 0 0 0 5 E 1 0 0 0 0 0 1 ESE 0 0 0 0 0 0 0 SE 1 2 0 0 0 0 3 SSE 0 12 0 14 S 1 4 0 6 SSW 1 2 0 3 SW 2 1 0 3 WSW 0 3 0 3 W 0 2 0 2 WNW 3 0 0 3 NW 1 3 0 4 NNW 1 11 0 14 Variable 0 0 0 0 Total 24 47 5 0 0 0 76 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 6 Hours of missing stability measurements in all stability classes: 22 53

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July - September 2011 Stability Class - Neutral - 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 21 13 2 36 NNE 11 3 0 14 NE 12 0 0 12 ENE 8 0 0 8 E 5 1 0 6 ESE 10 1 0 11 SE 8 15 1 24 SSE 8 56 9 73 S 9 18 3 30 SSW 8 19 3 30 SW 7 22 1 30 WSW 2 6 4 13 W 6 5 1 17 WNW 7 11 1 19 NW 10 29 1 40 NNW 12 42 13 70 Variable 0 0 0 0 Total 144 241 39 9 0 0 433 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 76 Hours of missing stability measurements in all stability classes: 22 54

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July - September 2011 Stability Class - Slightly 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 29 25 60 NNE 24 5 29 NE 16 0 16 ENE 18 0 18 E 12 0 12 ESE 21 3 24 SE 37 31 70 SSE 42 78 124 S 51 29 82 SSW 21 9 30 SW 27 13 40 WSW 24 4 30 W 23 21 45 WNW 25 27 52 NW 31 41 74 NNW 37 23 65 Variable 0 0 0 Total 438 309 21 3 0 0 771 Hours of calm in this stability class: 6 Hours of missing wind measurements in this stability class: 114 Hours of missing stability measurements in all stability classes: 22 55

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July - September 2011 Stability Class - Moderately Stable - 15OFt-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 4 0 0 0 0 0 4 NNE 0 0 0 0 0 0 0 NE 1 0 0 0 0 0 1 ENE 1 0 0 0 0 0 1 E 2 0 0 0 0 0 2 ESE 5 0 0 0 0 0 5 SE 4 2 0 0 0 0 6 SSE 12 0 0 12 S 11 2 0 13 SSW 16 3 0 19 SW 34 8 *0 42 WSW 46 15 0 61 W 57 6 0 63 WNW 24 8 0 32 NW 11 2 0 13 NNW 2 .0 0 2 Variable 0 0 0 0 Total 230 46 0 276 Hours of calm in this stability class: 4 Hours of missing wind measurements in this stability class: 50 Hours of missing stability measurements in all stability classes: 22 56

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July - September 2011 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 0 0 0 0 N 0 0 0 0 0 0 0 NNE 1 0 1 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 1 0 1 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 2 2 1 0 0 0 0 SSW 4 5 0 0 0 0 SW 43 54 0 0 0 0 WSW 45 5 50 0 0 0 0 W 10 3 13 0 0 0 0 WNW 4 1 5 0 0 0 0 NW 1 0 1 0 0 0 0 NNW 1 0 1 0 0 0 0 Variable 0 0 0 Total 110 23 0 0 0 0 133 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 12 Hours of missing stability measurements in all stability classes: 22 57

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July - September 2011 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 0 0 0 NNE 0 0 0 NE 0 0 2 ENE 0 0 3 E 0 0 7 ESE 0 0 14 SE 0 0 9 SSE 0 0 2 S 0 0 2 SSW 0 0 3 SW 0 0 1 WSW 0 0 0 W 0 0 0 WNW 0 0 1 NW 0 0 0 NNW 0 0 1 Variable 0 0 0 Total 0 18 26 1 0 0 45 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: 24 58

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July - September 2011 Stability Class - Moderately 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 0 2 0 0 0 0 2 NNE 0 2 1 0 0 0 3 NE 0 4 0 0 0 0 4 ENE 0 1 0 0 0 0 1 E 1 5 0 0 0 0 6 ESE 0 2 1 0 0 0 3 SE 0 8 7 1 0 0 16 SSE 0 1 2 0 0 0 3 S 0 2 2 9 0 0 13 SSW 0 2 5 0 0 0 7 SW 0 3 3 0 0 0 6 WSW 0 1 0 0 0 0 1 W 0 2 1 1 0 0 4 WNW 0 0 0 1 0 0 1 NW 0 2 1 1 0 0 4 NNW 0 4 5 0 0 0 9 Variable 0 0 0 0 0 0 0 Total 1 41 28 13 0 0 83 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: 24 59

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July - September 2011 Stability Class - Slightly 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 2 3 5 NNE 4 1 7 NE 3 1 7 ENE 3 0 7 E 6 0 11 ESE 3 2 6 SE 3 6 11 SSE 5 6 S 4 10 19 SSW 1 4 6 SW 6 0 8 WSW 3 2 6 W 2 2 5 WNW 2 2 5 NW 2 7 13 NNW 11 12 28 Variable 0 0 0 Total 13 60 58 23 1 0 155 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: 24 60

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July - September 2011 Stability Class - Neutral - 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 4 11 6 14 35 NNE 5 14 8 7 34 NE 9 12 12 6 39 ENE 12 23 17 4 56 E 5 23 1 0 29 ESE 3 20 12 7 42 SE 3 29 38 15 86 SE 3 22 51 9 87 S 1 23 43 23 91 SSW 2 13 23 5 44 SW 1 17 16 4 39 WSW 0 2 8 5 17 W 1 1 7 4 18 WNW 0 6 8 11 26 NW 0 22 40 21 87 NNW 2 22 33 17 79 Variable 0 0 0 0 0 Total 51 260 323 152 16 7 809 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: 24 61

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July - September 2011 Stability Class - Slightly 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 12 9 2 27 NNE 4 8 1 20 NE 9 10 0 28 ENE 13 9 0 28 E 25 9 2 41 ESE 19 10 2 37 SE 18 13 7 42 SSE 15 36 15 67 S 25 55 30 115 SSW 18 43 8 73 SW 25 21 3 50 WSW 9 15 10 37 W 11 9 11 34 WNW 6 9 18 39 NW 14 39 23 82 NNW 16 30 14 62 Variable 0 0 0 0 Total 52 239 325 146 14 6 782 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: 24 62

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July - September 2011 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 1 5 2 1 9 NNE 0 1 0 0 1 NE 3 2 1 0 6 ENE 4 4 1 0 9 E 1 5 1 0 7 ESE 3 2 0 0 5 SE 3 6 1 0 10 SSE 0 9 1 1 11 S 2 9 2 3 16 SSW 1 6 7 1 15 SW 2 10 7 6 25 WSW 0 5 8 8 22 W 4 3 11 11 32 WNW 0 4 8 9 23 NW 1 10 12 6 30 NNW 2 5 7 5 19 Variable 0 0 0 0 0 Total 27 86 69 51 7 0 240 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: 24 63

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: July - September 2011 Stability Class - Extremely Stable - 316Ft-33Ft Delta-T (F)

Winds Measured at 320 Feet Wirid Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 5 2 7 0 0 0 14 NNE 0 1 0 0 0 0 1 NE 1 0 0 0 0 0 1 ENE 0 0 0 0 0 0 0 E 0 1 0 0 0 0 1 ESE 0 0 1 0 0 0 1 SE 0 3 0 0 0 0 3 SSE 1 0 0 0 0 0 1 S 3 1 0 0 0 0 4 SSW 4 2 0 0 0 0 6 SW 0 2 1 0 0 0 3 WSW 2 1 0 0 0 0 3 W 1 2 0 2 0 0 5 WNW 1 5 2 1 0 0 9 NW 2 5 3 0 0 0 10 NNW 3 4 0 1 0 0 8 Variable 0 0 0 0 0 0 0 Total 23 29 14 4 0 0 70 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: 24 64

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October - December2011 Stability Class - Extremely Unstable - 150Ft-33Ft Delta-T (F)

Winds Measured at 3 3 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 N 0 0 0 0 0 0 0 NNE 2 2 4 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 2 0 2 0 0 0 0 E 3 1 4 0 0 0 0 ESE 0 4 4 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 Total 7 7 0 0 0 0 14 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: 4 65

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October - December2011 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 0 2 1 0 0 0 3 NNE 1 2 0 0 0 0 3 NE 1 1 0 0 0 0 2 ENE 6 2 0 0 0 0 8 E 0 2 0 0 0 0 2 ESE 0 1 0 0 0 0 1 SE 1 1 0 0 0 2 SSE 0 0 0 0 0 0 0 S 0 0 11 0 11 SSW 0 0 4 0 5 SW 0 0 1 0 2 WSW 0 0 5 0 5 W 0 0 0 0 0 WNW 0 0 0 0 0 NW 0 0 1 0 1 NNW 0 0 0 0 0 Variable 0 0 0 0 0 Total 9 11 23 0 45 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: 4 66

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October - December2011 Stability Class - Slightly 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 0 1 NNE 0 2 NE 0 3 ENE 0 2 E 0 0 ESE 0 2 SE 0 0 SSE 2 2 S 11 12 SSW 3 4 SW 1 1 WSW 2 4 W 1 1 WNW 3 3 NW 6 8 NNW 1 2 Variable 0 0 Total 6 6 30 5 0 0 47 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: 4 67

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October - December2011 Stability Class - Neutral - 15OFt-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 8 20 12 3 43 NNE 11 12 0 0 23 NE 18 0 0 0 18 ENE 12 0 0 0 12 E 12 7 0 0 19 ESE 4 7 2 0 13 SE 2 18 4 1 25 SSE 0 34 30 0 64 S 2 16 32 1 51 SSW 4 8 4 7 23 SW 1 20 9 4 34 WSW 2 18 16 3 39 W 3 22 29 7 63 WNW 3 46 56 14 119 NW 3 46 95 24 168 NNW 6 15 29 10 60 Variable 0 0 0 0 0 Total 91 289 318 74 2 0 774 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: 4 68

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October - December2011 Stability Class - Slightly 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 18 6 3 0 0 0 27 NNE 27 6 1 0 0 0 34 NE 43 1 0 0 0 0 44 ENE 41 6 0 0 0 0 47 E 51 14 0 0 0 0 65 ESE 44 21 1 1 0 0 67 SE 25 28 4 0 0 0 57 SSE 23 42 11 0 0 0 76 S 20 39 10 1 0 0 70 SSW 8 9 6 2 0 0 25 SW 13 33 7 1 0 0 54 WSW 17 32 9 0 0 0 58 W 21 43 19 0 0 0 83 WNW 20 49 12 0 0 0 81 NW 14 32 4 0 0 0 50 NNW 10 18 3 0 0 0 31 Variable 0 0 0 0 0 0 0 Total 395 379 90 5 0 0 869 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: 4 69

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October - Decemb .er2011 Stability Class - Moderately Stable - 150 Ft-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 0 0 0 0 N 8 0 8 0 0 0 0 NNE 7 0 7 0 0 0 0 NE 8 1 9 0 0 0 0 ENE 15 0 15 0 0 0 0 E 30 0 30 0 0 0 0 ESE 10 3 13 0 0 0 0 SE 16 3 19 0 0 0 0 SSE 11 1 12 0 0 0 0 S 5 0 5 0 0 0 0 SSW 10 4 14 0 0 0 0 SW 15 11 26 0 0 0 0 WSW 33 10 43 1 0 0 0 W 17 10 28 0 0 0 0 WNW 10 2 12 0 0 0 0 NW 7 3 10 0 0 0 0 NNW 12 1 13 0 0 0 0 Variable 0 0 0 Total 214 49 1 0 0 0 264 Hours of calm in this stability class: 5 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 70

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom INuclear Station Period of Record: ()ctober - December2011 Stability Class - Extremely Stable - 150Ft-33Ft Delta-T (F)

Winds Measuired at 33 Feet Win(I Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 6 6 NNE 3 3 NE 3 3 ENE 14 14 E 13 13 ESE 11 11 SE 2 2 SSE 2 2 S 4 4 SSW 5 5 SW 10 11 WSW 47 60 W 30 32 WNW 8 8 NW 2 3 NNW 3 3 Variable 0 0 Total 163 17 0 0 0 0 180 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: 4 71

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October - December2011 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 0 0 0 0 N 0 0 0 0 0 0 0 NNE 0 0 0 3 0 0 0 NE 0 0 3 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 *0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 Total 0 0 3 0 0 0 3 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: 4 72

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October - December2011 Stability Class - Moderately 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 0 0 0 0 NNE 0 0 0 1 NE 0 0 0 2 ENE 0 0 0 0 E 0 0 0 0 ESE 0 0 1 SE 0 3 SSE 0 0 S 0 0 SSW 0 1 SW 0 1 WSW 0 0 W 0 0 WNW 0 0 NW 0 0 NNW 0 0 Variable 0 0 Total 0 9 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: 4 73

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October - December2011 Stability Class - Slightly 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 0 0 0 0 1 0 1 NNE 0 0 1 0 0 0 1 NE 1 2 0 0 0 0 3 ENE 2 3 0 0 0 0 5 E 0 0 0 0 0 0 0 ESE 0 5 1 0 0 0 6 SE 0 0 2 1 0 0 3 SSE 0 0 0 0 0 0 0 S 0 0 11 3 0 0 14 SSW 0 0 1 10 0 0 11 SW 0 0 0 3 0 1 4 WSW 0 0 1 5 0 1 7 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 6 0 0 6 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 3 10 17 28 1 2 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: 4 74

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October - December2011 Stability Class - Neutral - 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 11 13 4 12 2 43 NNE 8 12 4 3 1 28 NE 10 2 2 4 0 25 ENE 20 20 2 3 0 48 E 13 22 7 1 0 48 ESE 8 4 5 1 0 19 SE 13 20 6 3 1 43 SSE 1 22 15 4 0 42 S 3 55 51 4 1 116 SSW 4 6 16 17 1 44 SW 3 17 10 8 1 39 WSW 4 21 9 8 4 47 W 3 16 31 15 4 70 WNW 3 34 62 24 12 135 NW 17 30 102 41 8 198 NNW 17 19 27 16 3 84 Variable 0 0 0 0 0 0 Total 23 138 313 353 164 38 1029 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: 4 75

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October - December2011 Stability Class - Slightly 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 3 8 15 0 0 26 NNE 1 5 7 2 2 17 NE 2 1 3 0 0 6 ENE 0 10 6 1 1 18 E 3 10 10 7 0 30 ESE 1 4 16 14 1 36 SE 3 11 37 11 1 63 SSE 0 23 33 5 1 62 S 4 18 55 29 2 108 SSW 3 14 21 18 2 58 SW 3 7 15 21 9 55 WSW 1 4 16 22 10 53 W 3 5 14 25 3 50 WNW 3 3 8 18 10 42 NW 1 4 28 21 6 60 NNW 1 7 12 8 0 28 Variable 0 0 0 0 0 0 Total 32 134 296 202 48 0 712 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabilityclass: 0 Hours of missing stability measurements in all stability classes: 4 76

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October - December2011 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 2 1 4 NNE 1 2 3 NE 0 0 3 ENE 1 0 3 E 1 0 3 ESE 2 1 3 SE 3 6 13 SSE 20 15 40 S 14 29 52 SSW 10 11 31 SW 9 7 27 WSW 6 7 17 W 8 9 23 WNW 4 0 6 NW 4 7 13 NNW 6 8 14 Variable 0 0 0 Total 41 91 103 18 2 0 255 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: 4 77

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Peach Bottom Nuclear Station Period of Record: October - December2011 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 0 2 4 0 6 NNE 1 0 0 0 1 NE 1 0 0 0 1 ENE 0 0 0 0 0 E 2 0 0 0 2 ESE 2 1 0 0 3 SE 3 3 0 0 6 SSE 4 5 2 0 11 S 3 3 2 0 8 SSW 2 3 3 0 8 SW 3 5 3 0 11 WSW 4 8 7 0 19 W 1 9 4 0 14 WNW 2 6 3 1 12 NW 3 3 11 0 17 NNW 0 4 1 16 Variable 0 0 0 0 0 Total 31 52 50 2 0 0 135 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: 4 78

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Appendix A- ERRATA Data Section 79

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC Radioactive Effluent Release Report, No.53, 2010 errata The noble gas doses were re-calculated using the ODCM Revision 13 X/Q values. The iodine 131 & 133, Tritium, Carbon 14 & particulate doses were re-calculated using the ODCM Revision 13 dose factors for ingestion, inhalation and ground plane pathways.

Gaseous Effluents - Summary Of All Releases Period: January 1, 2010 through December 31, 2010 Unit: Peach Bottom A. Fission &Activation Gases Units ouarter I Ouarter 2]Oarter 3 Ouarter 4 ErTotal

1. Total Release Ci 1.90E+02 2.01E+02 2.29E+02 1.53E+02 3.S1EE+01

2. Average Release Rate for Period pCi/sec 2.44E+01 2.56E+01 2.88E+01 1.92E+01

3. Gamma Air Dose mrad 7.45E-02 8.07E-02 8.04E-02 4.95E-02

4. Beta Air Dose mrad 5.07E-02 5.49E-02 5.49E-02 3.41 E-02

5. Percent of ODCM Limit

- Gamma Air Dose % I 7.45E-01 8.07E-01 08.04E-01 4.95E-01

- Beta Air Dose % [ 2.54E-01 2.75E-01 I2.75E-01 11.71 E-01 B. lodines

1. Total-I-131 Ci 3.76E-04 6.22E-04 7.47E-04 2.15E-04 1.76E-01

2. Average Release Rate for Period pCi/sec 4.84E-05 7.92E-05 9.40E-05 2.71 E-05

3. Percent of ODCM limit % ....

C. Particulate

1. Particulates with T 1/2 > 8 days Ci 1.78E-04 1.77E-04 2.02E-04 1.05E-04 1.94E+01

2. Average Release Rate for Period pCi/sec 2.29E-05 2.26E-05 2.55E-05 1.32E-05

3. Percent of ODCM limit % ....

D. Tritium

1. Total Release Ci 8.28E+00 7.62E+00 f1.06E+01 1.27E+01 1.11E+01

2. Average Release Rate for Period pCi/sec 1.07E+00 9.70E-01 11.34E+00 1.60E+00

3. Percent of ODCM limit % ....

E. Gross Alpha

1. Total Release Ci 0.00E+O0 O.O0E+00 0.00E+00 O.005E+0 4.00E+02

2. Average Release Rate for Period pCi/sec 0.00E+0 0.00E+00 j0.00E+00 O.OOE+00

3. Percent of ODCM limit % .. j.

F. Carbon-14 11.Total Release I Ci I8.88E+00 18.88E+00 18.88E+00 18.88E+00

12. Average Release Rate for Period I pCi/sec I1.14E+00 11.13E+00 11.12E+00 11.12E+00 G. Iodine 131 &133, Tritium, Carbon-14 & Particulate

1. Organ Dose mrem 1.37E-01 11.37E-01 11.37E-01 11.37E-01

2. Percent of ODCM Limit % 9.15E-01 9.15E-01 9.15E-01 9.16E-01

ODCM Limit is for combined Iodine, tritium, Carbon-14 and particulate only, which is shown in Item G.

80

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC The liquid doses were re-calculated to include the abnormal releases.

Liquid Effluents - Summary Of All Liquid Radwaste Releases Period: January 1, 2010 through December 31, 2010 Unit: Peach Bottom 1 Unts1 KQuarter L. K.~ . 1Est Total A. Fission & Activation Products Units Quarter 4 2 Quarter 3 Quarter 4 Error %

1. Total Release not including Ci 8.58E-04 1.99E-02 3.60E-02 1.34E-02 2.11EE+01 tritium, gases, alpha

2. Average Diluted concentration pCi/ml 1.76E-12 2.97E-11 5.97E-11 2.28E-11 during period

3. Percent of ODCM Limit

-Total Body Dose % 1.09E-02 1.42E-02 3.97E-02 1.93E-02

-Organ Dose % 3.78E-03 5.25E-03 1.64E-02 7.79E-03 B. Tritium 1 2Qtarte tst. Iotal Units Quarter IjQuarter 2jQuarter 3 Quarter 4 Error %

1. Total Release Ci 2.50E+01 2.85E+01 3.07E+01 2.74E+01 640E+00

2. Average diluted concentration pCi/ml 5.11E-08 4.26E-08 5.09E-08 4.67E-08 during period

3. Percent of 10CFR20 limit % 5.11E-03 4.26E-03 6.09E-03 4.67E-03 C. Dissolved and Entrained Gases Est. Total Units Ouarter I Quarter2 1Ouarter 3 Quarter4J Errort%

1. Total Release Ci 2.81 E-05 1.23E-05 3.41 E-0 5.86E-06 2.11 E+01-

2. Average diluted concentration pCi/mi 5.75E-14 1.84E-14 5.65E-14 9.98E-15

3. Percent of ODCM limit % 2.87E-08 9.1OE-09 2.82E-08 4.99E-09 D. Gross Alpha Activity Est. ota Units Quarter 1 Quarter 2 Quarter 3 Quarter 4 Error %

1. Total Release I Ci 11.85E-06 1.62E-0 7.33E-07 4.89E-08 2.30E+01 E. Volume of Waste Released prior to dilution Liters I2.18E+06 4.26E+05i 1.27E+06 2.33E+05 IF. Volume of Dilution Water I Used During Period Liters 4.89E+11 6.70E+11 6.03E+11 5.87E+11 81

Facility: Peach Bottom Units 2 & 3 Licensee: Exelon Generation Company, LLC PSEG Nuclear, LLC The doses were adjusted to reflect the corrected doses from liquid and gaseous releases.

Estimated Age Location % of Applicable Effluent Organ Dose Group Distance Direction Applicable Limit Unit Organ Dose Grou (meters) (toward) Limit Noble Gas Gamma - 2.85E-01 All 1097 SSE 1.43E4+00 20 mrad Air Dose I Noble Gas Beta -Air 1.9E-01 All 1097 SSE 4.87E-01 40 mrad Dose Noble Gas Total Body 2.76E-01 All 1097 SSE 2.76E+00 10 mrem (Gamma) I Noble Gas Skin (Beta) 3.59E-01 All 1097 SSE 1.20E-+00 30 mrem Iodine, Particulate Bone 5.55E-01 Child 1097 SSE 1.85E+00 Carbon-14& 30 mrem Tritium Liquid Total Body 2.47E-03 Adult Site Boundary 4.12E-02 6 mrem Liquid Bone 3.28E-03 Child 1.64E-02 20 mrem Direct Radiation Total Body <LLD All 1150 SSE <LLD 22 mrem 40 CFR Part 190 Compliance Total Dose Total Body 2.88E-01 All 1148 SSE 1.15E+00 25 mrem Total Dose Thyroid 4.04E-01 All 1148 SSE 5.39E-01 75 mrem Total Dose Bone 8.43E-01 All 1148 SSE 3.37E+00 25 mrem Total Dose Total Body 2.88E-01 All 1148 SSE 9.59E+00 3 mrem Total Dose Bone 8.43E-01 All 1148 SSE 2.81 E+01 3 mrem Total Dose Thyroid 4.04E-01 All 1148 SSE 7.35E-01 55 mrem 82

ML12121A570

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