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Annual Radioactive Effluent Release Report No. 40 - 2014
	ML15133A123
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Site:	Limerick
Issue date:	04/24/2015
From:	Dougherty T; Exelon Generation Co
To:	; Document Control Desk, Office of Nuclear Material Safety and Safeguards
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Exeton Generation,..,

Annual Radioactive Effluent Release Report No. 40 2014 Limerick Generating Station

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT NO. 40 January 1, 2014 through December 31, 2014 EXELON GENERATION COMPANY, LLC LIMERICK GENERATING STATION UNITS NO. 1 AND 2 DOCKET NO. 50-352 (Unit 1)

DOCKET NO. 50-353 (Unit 2)

Submitted to The United States Nuclear Regulatory Commission Pursuant to Renewed Facility Operating License:

NPF-39 (Unit 1)

NPF-85 (Unit 2)

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

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table of Contents

1. Intro d u ctio n ........................................................................................................................................ 1

2. Supplemental Inform ation .......................................................................................................... 1 A. Regulatory Lim its ............................................................................................................................ 1 B. Effluent Concentration Lim its .................................................................................................... 2 C. Average Energy (E ) ....................................................................................................................... 2 D. Measurem ents and Approxim ations of Total Radioactivity ....................................................... 2 E. Batch Releases .............................................................................................................................. 4 F. Abnormal Releases ........................................................................................................................ 4 G . S pills ............................................................................................................................................... 5 H. E R RA T A ......................................................................................................................................... 5 I. Revisions to the ODCM .......................................................................................................... 5 J. Radioactive Effluent Monitoring Instrumentation Out of Service for More Than 30 Days .......... 5 K. Independent Spent Fuel Storage Installation (ISFSI) ..................................................................... 5

3. Radiological Im pact to Man and Com pliance to 40 CFR 190 Lim its ............................................ 5 A. Dose to Mem bers of the Public at or Beyond Site Boundary ................................................... 5 B. Dose to Mem bers of the Public Inside the Site Boundary ........................................................ 7 Appendix A Effluent and W aste Disposal Sum m ary ............................................................................ 9 Appendix B Solid W aste and Irradiated Fuel Shipments ................................................................... 19 Appendix C Meteorological Data ............................................................................................................. 25 Appendix D ERRATA - Previous Reports .......................................................................................... 91 Appendix E Offsite Dose Calculation Manual Revision 27 Summary of Changes ............... 97

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SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC

1. Introduction In accordance with the reporting requirements of Technical Specification 6.9.1.8 applicable during the reporting period, this report summarizes the effluent release data for Limerick Generating Station Units 1 and 2 for the period January 1, 2014 through December 31, 2014. This submittal complies with the format described in Regulatory Guide 1.21, "Measuring, Evaluating and Reporting Radioactivity in Solid Wastes and Releases of Radioactive Materials in Liquid and Gaseous Effluents from Light-Water Cooled Nuclear Power Plants", Revision 1, June, 1974.

Meteorological data was reported in the format specified in Regulatory Guide 1.23, Revision 1, "Meteorological Monitoring Programs for Nuclear Power Plants".

All vendor results were received and included in the report calculations. Therefore the 2014 report is complete.

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

1. Noble Gases:

a. < 500 mrem/Yr Total Body ODCM Control 3.2.2.1.a

< 3000 mrem/Yr Skin

b. <10 mRad Air Gamma Quarterly air dose limits

< 20 mRad Air Beta ODCM Control 3.2.2.2.a

c. < 20 mRad Air Gamma Yearly air dose limits

< 40 mRad Air Beta ODCM Control 3.2.2.2.b

d. <10 mrem Total Body 10 CFR 50, Appendix I, Section (Gamma) II.B.2(b) (limits listed here are

< 30 mrem Skin (Beta) based on two unit operation)

2. lodines, Tritium, Particulates with Half Life > 8 days:

a. < 1500 mrem/Yr Any Organ ODCM Control 3.2.2.1.b

b. <15 mrem Any Organ Quarterly dose limits ODCM Control 3.2.2.3.a

c. < 30 mrem Any Organ Yearly dose limits ODCM Control 3.2.2.3.b

3. Liquid Effluents

a. 10 times the concentration limits in 10 CFR 20, ODCM Control 3.2.1.1 Appendix B, Table 2 Col. 2

b. -<3 mrem Total Body Quarterly dose limits

<10 mrem Any Organ ODCM Control 3.2.1.2.a

c. -<6 mrem Total Body Yearly dose limits

< 20 mrem Any Organ ODCM Control 3.2.1.2.b

4. 40 CFR 190, 10 CFR 72.104

< 25 mrem Total Body or Organ Yearly dose limits

< 75 mrem Thyroid ODCM Control 3.2.3 Page 1

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC B. Effluent Concentration Limits Gaseous dose rates rather than effluent concentrations are used to calculate permissible release rates for gaseous releases. The maximum permissible dose rates for gaseous releases are defined in Offsite Dose Calculation Manual (ODCM) Controls 3.2.2.1.a and 3.2.2.1.b as 500 mrem/yr (Total Body), 3000 mrem/yr (Skin), and 1500 mrem/yr (Organ).

The Effluent Concentration Limit (ECL) specified in 10 CFR 20, Appendix B, Table 2, Column 2 for identified nuclides, were used to calculate permissible release rates and concentrations for liquid release per the Limerick ODCM Control 3.2.1.1. The total activity concentration for all dissolved or entrained gases was limited to < 2E-04 giCi/ml.

C. Average Energy (E-)

The Limerick ODCM limits the instantaneous dose equivalent rates due to the release of noble gases to less than or equal to 500 mrem/year to the total body and less than or equal to 3000 mrem/year to the skin. The average beta and gamma energies (E ) of the radionuclide mixture in releases of fission and activation gases as described in Regulatory Guide 1.21, "Measuring, Evaluating, and Reporting Radioactivity in Solid Wastes and Releases of Radioactive Materials in Liquid and Gaseous Effluents from Light-Water-Cooled Nuclear Power Plants," may be used to calculate doses in lieu of more sophisticated software. The Limerick radioactive effluent program employs the methodologies presented in U.S. NRC Regulatory Guide 1.109 "Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10 CFR Part 50, Appendix I," Revision 1, October 1977 and NUREG-0133, "Preparation of Radiological Effluent Technical Specifications for Nuclear Power Plants, October 1978. Therefore, average energies are not applicable to Limerick.

D. Measurements and Approximations of Total Radioactivity

1. Fission and Activation Gases The method used for Gamma Isotopic Analysis is the Canberra Gamma Spectroscopy System with a gas Marinelli beaker. Airborne effluent gaseous activity was continuously monitored and recorded in accordance with ODCM Table 4.2-2. Additional vent grab samples were taken from the North Stack, Unit 1 South Stack and Unit 2 South Stack and analyzed at least monthly to determine the isotopic mixture of noble gas activity released for the month. The data from the noble gas radiation monitors were analyzed to report net noble gas effluent activity. When no activity was found in the grab isotopic analysis, the isotopic mixture was assumed to be that evaluated in the UFSAR (Section 11.5, Table 11.5-4). If activity was found in the grab isotopic analysis, the isotopic mixture for the Noble Gas Monitor was determined from that isotopic mixture.

Each month a monitor background was determined at the time of the noble gas grab sample and used to determine net radiation monitor activity. When no isotopic activity was identified in the grab noble gas sample, the noble gas radiation monitor 15-minute average data for one-hour prior to and one-hour post noble gas grab sampling were used to determine monitor background for the month.

The mean plus two standard deviations was used as background for each Noble Gas Monitor.

When activity was identified the background determination was made from the last month that no activity was found.

2. Particulates and lodines The method used for Gamma Isotopic Analysis is the Canberra Gamma Spectroscopy System with a particulate filter (47 mm) or charcoal cartridge, respectively. Particulate and iodine activity was continuously sampled and analyzed in accordance with ODCM Table 4.2-2. Charcoal and particulate samples are taken from the North Stack, Unit 1 South Stack, Unit 2 South Stack and the Hot Maintenance Shop exhausts and analyzed at least weekly to determine the total activity released from the plant based on the highest vent flow rates recorded for the sampling period.

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SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC

3. Carbon-14 in gaseous effluents Gaseous releases of Carbon-14 were estimated based upon a study by EPRI (EPRI 1021106, Estimation of Carbon-14 in Nuclear Power Plant Gaseous Effluents). The principal production reaction leading to the release of C-14 during plant operation is the 0-17(n,a) C-14 nuclear reaction in reactor coolant. Carbon-14 is also produced by neutron activation of N-14 in the BWR drywell and dissolved nitrogen in the reactor coolant, however these sources are a small fraction of that produced by the 0-1 7(n,a) C-14 reaction and can be neglected since reactor coolant normally contains less than 0.1 ppm by weight nitrogen and the neutron flux in the drywell is low. Most of the C-1 4 produced in a BWR is released in a gaseous form by the off-gas system, primarily in the form of 14CO 2 An Exelon fleet-wide spreadsheet was developed using the production factors from the EPRI report. The spreadsheet requires site specific inputs of total reactor power ratings (7030) MWth and Equivalent Full Power Operation (350) days. Using this method, total C-14 production was estimated at 34.03 Curies (Ci). Ninety-five percent or 32.34 Ci was in the form of 14CO 2 , which was the chemical form necessary to be incorporated in the dose pathways of vegetation, meat and milk.

Only inhalation pathway uses the full C-14 production value in estimating dose.

To simplify the dose calculations for C-14, the total production value was used in calculating dose via the offsite effluent pathways. Using the total production C-14 production value, results in a conservative five percent overestimation of dose via the vegetation, meat and milk pathways. In addition, releases of C-14 were assumed to occur only through the North Vent, which is common to both units. The North Vent has the most conservative X/Q factors for calculating dose.

4. Liquid Effluents Each batch of liquid effluent was sampled and analyzed for gamma isotopic activity in accordance with ODCM Table 4.2-1 prior to release. The total activity of each released batch was determined by multiplying each nuclide's concentration by the total volume discharged and then summing. The total activity released during a quarter was then determined by summing the activity content of all batch releases discharged during the quarter.

5. Tritium in Liquid and Gaseous Effluents Liquid effluents are analyzed for tritium using a Liquid Scintillation Counter.

Gaseous effluents are analyzed for tritium by passing air from stack effluents through two bubblers in series. An aliquot of the water from each bubbler was analyzed using a Liquid Scintillation Counter.

The monthly liquid radwaste composite was analyzed for tritium using a Liquid Scintillation Counter.

6. Composite Samples and Lower Limit of Detection (LLD)

Particulate air samples were composited monthly and analyzed for gross alpha, Sr-89, Sr-90, and Ni-63. Liquid radwaste samples were composited monthly and quarterly and analyzed for gross alpha (monthly) and Fe-55, Sr-89 and Sr-90 (quarterly). These composites were submitted to an offsite vendor laboratory for analysis.

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

Airborne: LLD Gross Alpha, Sr-89, Sr-90 1E-11 uCi/cc H-3 1 E-06 uCi/cc 1-131 1E-12 uCi/cc Principal Gamma Emitters (Mn-54, Fe-59, Co-58, Co-60, Zn-65, Mo-99, 1E-11 uCi/cc 1-131, Cs-134, Cs-137,Ce-141, Ce-144)

Noble Gas (Kr-87, Kr-88, Xe-133, Xe-133m, Xe-135, Xe-135m, Xe-138) 1E-04 uCi/cc Page 3

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Liquid: LLD Principal Gamma Emitters (Mn-54, Fe-59, Co-58, Co-60, Zn-65, Mo-99, 5E-07 uCi/ml Cs-134, Cs-137, Ce-141, Ce-144) 1-131 1E-06 uCi/mI Entrained Gases (Kr-87, Kr-88, Xe-133, Xe-133m, Xe-135, Xe-135m, 1E-05 uCi/ml Xe-1 38)

H-3 1E-05 uCi/ml Gross Alpha 1 E-07 uCi/ml Sr-89, Sr-90 5E-08 uCi/ml Fe-55 1E-06 uCi/ml

7. Estimated Total Error Present Procedure CY-AA-170-2100, Estimated Errors of Effluent Measurements, provides the methodology to obtain an overall estimate of the error associated with radioactive effluents. The sum of errors used in this report was documented in IR 138895-02.

E. Batch Releases Liquid Qtr 1 Qtr 2 Qtr 3 Qtr 4 Total Number of Batch Releases 5.00E+00 1.20E+01 0.OOE+00 0.00E+00 1.70E+01 Total time period for batch releases (min) 5.08E+02 4.18E+03 0.OOE+00 0.OOE+00 4.68E+03 Maximum time period for batch release (min) 1.13E+02 1.81E+03 0.OOE+00 0.OOE+00 1.81E+03 Average time period for batch release (min) 1.02E+02 3.48E+02 0.OOE+00 0.OOE+00 2.76E+02 Minimum time period for batch release (min) 8.20E+01 7.90E+01 0.00E+00 0.00E+00 7.90E+01 Average stream flow (Schuylkill River) during periods of release of effluents into a flowing 2.33E+04 1.99E+04 0.OOE+00 0.00E+00 2.03E+04 stream (LPM)

Gaseous Qtr I Qtr 2 Qtr 3 Qtr 4 Total Number of Batch Releases 0.OOE+00 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 Total time period for batch releases (min) 0.00E+00 0.OOE+00 0.00E+00 0.00E+00 0.00E+00 Maximum time period for batch release (min) 0.OOE+00 0.OOE+00 0.00E+00 0.OOE+00 0.OOE+00 Average time period for batch release (min) 0.OOE+00 0.OOE+00 0.00E+00 0.00E+00 0.00E+00 Minimum time period for batch release (min) O.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 F. Abnormal Releases

1. Liquid Qtr I Qtr 2 Qtr 3 Qtr 4 Total Number of Releases O.OOE+00 2.OOE+00 0.OOE+00 0.OOE+00 2.OOE+00 Total Activity Released (Ci) 0.00E+00 4.84E-04 0.00E+00 0.OOE+00 4.84E-04

2. Gaseous Qtr 1 Qtr 2 Qtr 3 Qtr 4 Total Number of Releases 0.00E+00 0.00E+00 0.00E+00 0.OOE+00 0.OOE+00 Total Activity Released (Ci) 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 Tritiated water identified in the Condensate Storage Tank dike was released via the Hold Pond.

The concentrations released represent a small fraction of the Total Body and Organ Dose limits, 3.48E-05% and 1.04E-05% respectively, and is included in the Appendix A Table 2A summary.

The event was documented in IR 1658517.

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SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Co-60 and Mn-54 were identified in the Hold Pond on May 16, 2014 at a concentration of 6.6E-08 uCi/ml and 1.3E-08 uCi/ml, respectively. The concentrations released represent a small fraction of the Total Body and Organ Dose limits, 5.05E-03% and 1.75E-03% respectively, and is included in the Appendix A Table 2A summary. The event was documented in IR 1660987.

G. Spills There were no reportable spills in 2014.

H. ERRATA The Dosimetry data was documented as a gross value in the 2013 ARERR. Re-evaluation of the data was performed, subtracting out extraneous dose. Extraneous dose is the dose accumulated on a dosimeter prior to and after field deployment from radiation other than that at the field monitoring location. The extraneous dose can include natural terrestrial background radiation, cosmic sources, elevated dose from transport at high altitudes, any man-made sources potentially encountered in transit or at the facility, such as shipments of medical or other radioisotopes or facility sources. The extraneous dose is subtracted from the field dosimeter reading in order to determine the field dose. The subtraction of extraneous dose (also referred to as transit dose) is recommended by ANSI N545-1975, which is supported by the Regulatory Guide 4.13 Revision 1 (July 1977).

The affected, corrected pages, in their entirety, are included in Appendix D.

Revisions to the ODCM Revision 27 of the ODCM was issued in September 2014. The summary of changes is included in Appendix E. The ODCM Revision 27 is being submitted, in its entirety, along with this Annual Report.

J. Radioactive Effluent Monitoring Instrumentation Out of Service for More Than 30 Days One piece of radioactive effluent monitoring instrumentation was out of service for more than 30 days in 2014. The B RHRSW (Residual Heat Removal Service Water) radiation monitor was unavailable from 10/21/14 - 1/10/15. Parts availability delayed the restoration of the instrument. During this period compensatory samples were collected and analyzed to meet the requirements of the ODCM (IR 2398865).

K. Independent Spent Fuel Storage Installation (ISFSI)

An Independent Spent Fuel Storage Installation (ISFSI) was placed in service starting July 21, 2008. In 2014 the dose to the nearest resident from the ISFSI was 0.00 mrem, using environmental dosimeters from the Radiological Environmental Monitoring Program.

3. Radiological Impact to Man and Compliance to 40 CFR 190 Limits A. Dose to Members of the Public at or Beyond Site Boundary Per ODCM Control 6.2, the Annual Radioactive Effluent Release Report shall include an assessment of the radiation doses to the hypothetically highest exposed MEMBER OF THE PUBLIC from reactor releases and other nearby uranium fuel cycle sources. The ODCM does not require population doses to be calculated. For purposes of this calculation the following assumptions were made:

. Long term annual average meteorology X/Q and D/Q and actual gaseous effluent releases were used.

. Gamma air dose, Beta air dose, Total Body and Skin doses were attributed to noble gas releases.

. Critical organ and age group dose attributed to iodine, particulate, carbon-14 and tritium releases.

100 percent occupancy factor was assumed.

Dosimetry measurements (minus background levels) obtained from the Radiological Environmental Monitoring Program for the nearest residence to the Independent Spent Fuel Storage Installation (ISFSI) was used to determine direct radiation exposure.

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SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC

The highest doses from the critical organ and critical age group for each release pathway was summed and added to the net dosimetry measurement from nearest residence to the ISFSI for 40CFR1 90 compliance.

Gaseous Releases:

The critical age-organ group was the child-bone. Calculated dose was 1.40E+00 mrem, which represents 4.67 E+00 percent of the allowable limits. Carbon-14 represented 99.9 % or 1.40E+00 mrem of the total dose (Table 1).

Liquid Releases:

The critical age-organ was the child-Liver. Calculated total body dose and organ dose were 4.93E-04 and 5.59E-4 mrem, respectively.

40 CFR 190 Compliance:

The maximum calculated dose to a real individual would not exceed 2.86E-01 mrem (total body),

1.41 E+00 mrem (organ), or 2.86 E-01 mrem (thyroid).

All doses calculated were well below all ODCM and 40 CFR Part 190 limits to a real individual.

Table 1 Summary of Gaseous and Liquid Effluent Doses to Members of the Public at the Highest Dose Receptors and 40CFR190 Compliance Maximum Individual Applicable Estimated Age % of Limit Unit Noble Gas Dose Dose Group Applicable Limit Nearest Residence Gamma Air Dose 5.99E-03 All 3.OOE-02 20 mRad Nearest Residence Beta Air Dose 3.69E-03 All 9.23E-03 40 mRad Nearest Residence Total Body 5.64E-03 All 5.64E-02 10 mrem Nearest Residence Skin 9.28E-03 All 3.09E-02 30 mrem Iodine, Particulate, C-14 &

Tritium Vegetation Pathway Bone 1.40E+00 Child 4.67E+00 30 mrem Liquid __ __ Bo y4 3 0403 LGS Outfall Total Body 4.93E-04 Adult 8.22E-03 6 mrem LGS Outfall GI-Lli 5.59E-04 Adult 2.80E-03 20 mrem 40 CFR 190 Compliance Gaseous Effluents Noble Particulate, Liquid Net Direct Total % of Applicable Limit Unit Gas Iodine, C-14 Effluents Radiation Limit

& Tritium Total Body Dose 5.64E-03 2.80E-01 4.93E-04 0.OOE+00 2.86E-01 1.15E+00 25 mrem Organ Dose 9.28E-03 1.40E+00 5.59E-04 0.OOE+00 1.41E+00 5.64E+00 25 mrem Thyroid Dose 5.64E-03 2.80E-01 4.55E-04 0.OOE+00 2.86E-01 3.82E-01 75 mrem Page 6

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC B. Dose to Members of the Public Inside the Site Boundary ODCM Control 6.2 also requires that the Annual Effluent Release Report shall include an assessment of the radiation doses from radioactive liquid and gaseous effluents to members of the public due to activities inside the Site Boundary during the report period. MEMBER OF THE PUBLIC shall include all persons not occupationally associated with the plant. This category does not include employees of the utility or contractors. Also excluded from this category are persons who enter the site to service equipment or to make deliveries. This category does include persons who use portions of the site for recreational, occupational education, or other purposes not associated with the plant. A MEMBER OF THE PUBLIC may receive up to 100 mrem in a year (10CFR20.1301). Areas within the site boundary, where radiation dose of this type could occur include the Limerick Information Center on Longview Road, Frick's Lock on the south shore of the Schuylkill River and the railroad tracks that runs along the north shore of the River. The dose to State Police and National Guard personnel around the location of the Security Checkpoint was also included in this report. The radiation doses to Members of the Public have been estimated using methodology stated in the ODCM. The maximum gaseous dose to members of the public at these locations is based on the following assumptions:

. Long term annual average meteorology and actual effluent releases for the sectors encompassing the Railroad Tracks (W), Information Center, Frick's Lock and the Security Checkpoint were used.

o Dose is from ground plane and inhalation only. No ingestion dose is included.

o Adult age group was used for the State Police and National Guard Dose.

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

The maximum calculated dose for activities on site was 3.77E-02 mrem at the Rail Road Tracks in the West sector (Table 2). All Doses calculated were a small fraction of the 10 CFR 20.1301 limits.

Table 2 Summary of Gaseous Radiation Doses to Members of the Public for Activities on Site Total Body Dose Organ Dose, 1 mrem~

Approx. X/Q D/Q mrem~ )

Location Sector Distance s/mA3 l/mA2 Iodine, Iodine, Total (meters) Noble Gas Particulate, Particulate, C-14 & H-3 C-14 & H-3 R.R. Tracks W 225 2.66E-06 2.36E-08 6.51E-03 5.41 E-03 2.58E-02 3.77E-02 Info. Center ESE 884 7.32E-07 9.27E-09 1.79E-03 1.49E-03 7.11E-03 1.04E-02 Frick's Lock WSW 450 5.58E-07 4.78E-09 1.37E-03 1.14E-03 5.42E-03 7.93E-03 Security NNE 682 4.OOE-07 4.43E-09 9.78E-04 4.65E-04 1.97E-03 3.41 E-03 Check Point I I I I I I (1) The limit for sum of the Total Body Dose and Organ Dose = 100 mrem (ref. 10 CFR 20.130 1)

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SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Appendix A Effluent and Waste Disposal Summary Page 9

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SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC LIST OF TABLES PAGE TABLE 1A GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES 13 TABLE 1B-1 GASEOUS EFFLUENTS-MIXED-LEVEL RELEASE - BATCH MODE 14 TABLE 1B-2 GASEOUS EFFLUENTS - MIXED-LEVEL RELEASE - CONTINUOUS MODE 15 TABLE 2A LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES 16 TABLE 2A-1 LIQUID EFFLUENTS - BATCH MODE 17 TABLE 2A-2 LIQUID EFFLUENTS - CONTINUOUS MODE 18 Page 11

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SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC TABLE 1A GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES PERIOD 2014 A. Fission And Activation Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Total Uncertainty Gasses (%)

Total Release Ci 6.27E+01 2.95E+01 1.46E+01 2.OOE+00 1.09E+02 36.6 Average Release Rate for uCi/sec 7.95E+00 3.74E+00 1.86E+00 2.53E-01 3.45E+00 Period Dose - Gamma Air Dose mrad 3.38E-03 1.61 E-03 7.96E-04 1.97E-04 5.98E-03

- Beta Air Dose mrad 2.09E-03 9.93E-04 4.92E-04 1.15E-04 3.69E-03 Percent of ODCM Limit

- Gamma Air Dose % 3.38E-02 1.61 E-02 7.96E-03 1.97E-03 2.99E-02

- Beta Air Dose % 1.05E-02 4.96E-03 2.46E-03 5.76E-04 9.23E-03 B. Radioiodines Units Qtr I Qtr 2 Qtr 3 Qtr 4 Total Uncertainty

(%)

Total Release Ci < LLD < LLD < LLD < LLD < LLD 20.4 Average Release Rate for uCi/sec < LLD < LLD < LLD < LLD < LLD Period Percent of ODCM Limit %*.....

C. Particulates Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Total Uncertainty (N)

Total Release Ci < LLD < LLD < LLD < LLD < LLD 22.6 Average Release Rate for uCi/sec < LLD < LLD < LLD Period < LLD < LLD Percent of ODCM Limit % .....

D. Gross Alpha Units Qtr I Qtr 2 Qtr 3 Qtr 4 Total Uncertainty Total Release Ci < LLD < LLD < LLD < LLD <LLD 22.6 Average Release Rate for uCi/sec < LLD < LLD < LLD < LLD < LLD Period Percent of ODCM Limit %*.....

E. Tritium (H-3) Units Qtr I Qtr 2 Qtr 3 Qtr 4 Total Uncertainty Total Release Ci 9.99E+00 1.08E+01 1.25E+01 9.43E+00 4.27E+01 15.7 Average Release Rate for Period uCi/sec 1.27E+00 1.36E+00 1.58E+00 1.20E+00 1.35E+00 Percent of ODCM Limit %*.....

F. Carbon-14 Units Qtr I Qtr 2 Qtr 3 Qtr 4 Total Total Release Ci 6.85E+00 9.42E+00 1.01E+01 7.72E+00 3.40E+01 Average Release Rate for uCi/sec 8.68E-01 1.20E+00 1.28E+00 9.79E-01 1.08E+00 Period Percent of ODCM Limit %*.....

G. Iodine 131 & 133, Units Qtr I Qtr 2 Qtr 3 Qtr 4 Total Particulate, C-14 & H-3 I Organ Dose mrem 2.81E-01 3.86E-01 4.12E-01 3.16E-01 1.40E+00 Percent of ODCM Limit % 1.87E+00 2.57E+00 2.75E+00 2.11E+00 4.65E+00

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

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SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC TABLE 1B-1 GASEOUS EFFLUENTS-MIXED-LEVEL RELEASE-BATCH MODE PERIOD 2014 Fission And Aivaion Ase Units Qtr I Activation Gasses Qtr 2 Qtr 3 Qtr 4 Total Ar-41 Ci N/A N/A N/A N/A N/A Kr-85 Ci N/A N/A N/A N/A N/A Kr-85m Ci N/A N/A N/A N/A N/A Kr-87 Ci N/A N/A N/A N/A N/A Kr-88 Ci N/A N/A N/A N/A N/A Xe-1 33 Ci N/A N/A N/A N/A N/A Xe-135 Ci N/A N/A N/A N/A N/A Xe-135m Ci N/A N/A N/A N/A N/A Xe-1 38 Ci N/A N/A N/A N/A N/A Total Ci N/A N/A N/A N/A N/A Radioiodines Units Qtr I Qtr 2 Qtr 3 Qtr 4 Annual 1-131 Ci N/A N/A N/A N/A N/A 1-133 Ci N/A N/A N/A N/A N/A 1-135 Ci N/A N/A N/A N/A N/A Total Ci N/A N/A N/A N/A N/A Particulates Units Qtr I Qtr 2 Qtr 3 Qtr 4 Annual Cr-51 Ci N/A N/A N/A N/A N/A Mn-54 Ci N/A N/A N/A N/A N/A Co-58 Ci N/A N/A N/A N/A N/A Co-60 Ci N/A N/A N/A N/A N/A Zn-65 Ci N/A N/A N/A N/A N/A Sr-89 Ci N/A N/A N/A N/A N/A Sr-90 Ci N/A N/A N/A N/A N/A Mo-99 Ci N/A N/A N/A N/A N/A Ag-110m Ci N/A N/A N/A N/A N/A Cs-1 34 Ci N/A N/A N/A N/A N/A Cs-137 Ci N/A N/A N/A N/A N/A Ba-140 Ci N/A N/A N/A N/A N/A La-140 Ci N/A N/A N/A N/A N/A Ce-141 Ci N/A N/A N/A N/A N/A Ce-144 Ci N/A N/A N/A N/A N/A Total Ci N/A N/A N/A N/A N/A H-3 Ci N/A N/A N/A N/A N/A Gross Alpha Ci N/A N/A N/A N/A N/A C-14 Ci N/A N/A N/A N/A N/A Page 14

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC TABLE 1B-2 GASEOUS EFFLUENTS - MIXED-LEVEL RELEASE - CONTINUOUS MODE PERIOD 2014 Fission And Units Activation Qtr 1 Qtr 2 Qtr 3 Qtr 4 Total Gasses Kr-85m Ci 1.09E+00 5.13E-01 2.55E-01 3.87E-02 1.90E+00 Kr-85 Ci 2.04E-01 1.17E-01 5.57E-02 1.39E-01 5.16E-01 Kr-87 Ci 1.13E+00 5.36E-01 2.66E-01 6.64E-02 2.OOE+00 Kr-88 Ci 1.20E+00 5.78E-01 2.86E-01 1.07E-01 2.17E+00 Ar-41 Ci 4.32E+00 2.01 E+00 1.OOE+00 7.75E-03 7.34E+00 Xe-131m Ci 5.1OE-03 2.94E-03 1.40E-03 3.48E-03 1.29E-02 Xe-133 Ci 2.25E+01 1.05E+01 5.21E+00 5.32E-02 3.82E+01 Xe-135m Ci 1.64E+01 7.67E+00 3.81E+00 3.52E-01 2.82E+01 Xe-135 Ci 1.25E+01 5.89E+00 2.92E+00 5.29E-01 2.18E+01 Xe-138 Ci 3.44E+00 1.71E+00 8.39E-01 6.99E-01 6.69E+00 Total Ci 6.27E+01 2.95E+01 1.46E+01 2.OOE+00 1.09E+02 Radioiodines Units Qtr I Qtr 2 Qtr 3 Qtr 4 Total 1-131 Ci < < LLD < LLD < LLD < LLD 1-133 Ci < < LLD < LLD < LLD < LLD 1-135 Ci < < LLD < LLD < LLD < LLD Total Ci < < LLD < LLD < LLD < LLD Particulates Units Qtr I Qtr 2 Qtr 3 Qtr 4 Annual Cr-51 Ci < < LLD < LLD < LLD < LLD Mn-54 Ci < < LLD < LLD < LLD < LLD Co-58 Ci < < LLD < LLD < LLD < LLD Co-60 Ci < < LLD < LLD < LLD < LLD Ni-63 Ci < < LLD < LLD < LLD < LLD Zn-65 Ci < < LLD < LLD < LLD < LLD Sr-89 Ci < < LLD < LLD < LLD < LLD Sr-90 Ci < < LLD < LLD < LLD < LLD Mo-99 Ci < < LLD < LLD < LLD < LLD Cs-134 Ci < < LLD < LLD < LLD < LLD Cs-137 Ci < < LLD < LLD < LLD < LLD Ba-140 Ci < < LLD < LLD < LLD < LLD La-140 Ci < < LLD < LLD < LLD < LLD Ce-141 Ci < < LLD < LLD < LLD < LLD Ce-144 Ci < < LLD < LLD < LLD < LLD Total Ci < < LLD < LLD < LLD < LLD H-3 Ci 9.99E+00 1.08E+01 1.25E+01 9.43E+00 4.27E+01 Gross Alpha Ci < < LLD < LLD < LLD < LLD C-14 Ci 6.85E+00 9.42E+00 1.01 E+01 7.72E+00 3.40E+01 Page 15

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC TABLE 2A LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES PERIOD 2014 Fission and Activation Products Excluding Uncertainty Tritium, Gasses & Units Qtr I Qtr 2 Qtr 3 Qtr 4 Total (%)

Alpha)

Total Release Ci 1.46E-04 7.35E-04 0.OOE+00 0.OOE+00 8.81E-04 21.1 Average Concentration uCi/ml 1.20E-08 8.48E-09 N/A N/A 8.92E-09 Dose - Whole Body mrem 7.10E-05 4.22E-04 N/A N/A 1.78E-04

- Organ mrem 8.17E-05 4.77E-04 N/A N/A 1.79E-04

% of ODCM Limit 2.37E-03 1.41 E-02 N/A N/A 2.97E-03

- Whole Body Dose* %

- Organ Dose* % 8.17E-04 4.77E-03 N/A N/A 8.96E-04 Uncertainty Tritium Units Qtr I Qtr 2 Qtr 3 Qtr 4 Total (%)

Total Release Ci 1.79E+00 2.68E+00 N/A N/A 4.47E+00 6.4 Average Concentration uCi/ml 1.47E-04 3.09E-05 N/A N/A 4.52E-05

% of ODCM Limit - ECL % 1.47E+00 3.09E-01 N/A N/A 4.52E-01 Dissolved and Entrained Uncertainty Gases Units Qtr I Qtr 2 Qtr 3 Qtr 4 Total (%)

Total Release Ci 8.50E-06 1.12E-05 N/A N/A 1.97E-05 21.1 Average Concentration uCi/ml 6.98E-10 1.29E-10 N/A N/A 1.99E-10

% of ODCM Limit - ECL % 3.49E-04 6.45E-05 N/A N/A 9.96E-05 Uncertainty Qtr I Qtr 2 Qtr 3 Qtr 4 Total (%)

Gross Alpha Units Total Release Ci < LLD < LLD N/A N/A < LLD 23.0 Average Concentration uCi/ml N/A N/A N/A N/A N/A Volume of Waste Uncertainty Released Units Qtr I Qtr 2 Qtr 3 Qtr 4 Total (%)

Total Liters 3.62E+05 3.55E+06 N/A N/A 3.92E+06 5.0 Volume of Dilution ater used during Units Qtr 1 Qtr 2 Qtr 3 Qtr 4 Total Uncerainty period 7/ 9E3 Nr183 I[otal Liters 1.18E+07 8.31 E+07 N/A N/A 9.49E+071 3.6

Percent of limit includes gases and tritium.

Page 16

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC TABLE 2A-1 LIQUID EFFLUENTS - BATCH MODE PERIOD 2014 Fission and Activation Units Qtr I Qtr 2 Qtr 3 Qtr 4 Total Products NA-24 Ci < LLD 4.71 E-06 N/A N/A 4.71 E-06 Cr-51 Ci 9.95E-06 1.05E-04 N/A N/A 1.14E-04 Mn-54 Ci 1.09E-05 5.95E-05 N/A N/A 7.04E-05 Fe-55 Ci < LLD < LLD N/A N/A < LLD Co-58 Ci 7.81 E-06 2.94E-05 N/A N/A 3.72E-05 Fe-59 Ci < LLD 7.86E-06 N/A N/A 7.86E-06 Co-60 Ci 1.05E-04 4.OOE-04 N/A N/A 5.05E-04 Zn-65 Ci 1.27E-05 6.78E-05 N/A N/A 8.05E-05 Sr-89 Ci < LLD < LLD N/A N/A < LLD Sr-90 Ci < LLD < LLD N/A N/A < LLD Zr-95 Ci < LLD < LLD N/A N/A < LLD Nb-95 Ci < LLD < LLD N/A N/A < LLD Nb-97 Ci < LLD < LLD N/A N/A < LLD Mo-99 Ci < LLD < LLD N/A N/A < LLD TC-99m Ci < LLD < LLD N/A N/A < LLD Sb-122 Ci < LLD 1.59E-06 N/A N/A 1.59E-06 Sb-124 Ci < LLD 3.46E-05 N/A N/A 3.46E-05 Sb-125 Ci < LLD 2.12E-05 N/A N/A 2.12E-05 1-131 Ci < LLD < LLD N/A N/A < LLD Cs-1 34 Ci < LLD < LLD N/A N/A < LLD Cs-1 37 Ci < LLD 3.79E-06 N/A N/A 3.79E-06 Ba-140 Ci < LLD < LLD N/A N/A < LLD La-140 Ci < LLD < LLD N/A N/A < LLD Ce-141 Ci < LLD < LLD N/A N/A < LLD Total Ci 1.46E-04 7.35E-04 O.OOE+00 0.OOE+00 8.81 E-04 Dissolved Entrained and ase Units Qtr I Qtr 2 Qtr 3 Qtr 4 Total Entrained Gases Kr-87 Ci < LLD < LLD N/A N/A < LLD Kr-88 Ci < LLD < LLD N/A N/A < LLD Xe-1 33 Ci < LLD 3.46E-06 N/A N/A 3.46E-06 Xe-1 33m Ci < LLD < LLD N/A N/A < LLD Xe-135 Ci 8.50E-06 7.73E-06 N/A N/A 1.62E-05 Xe-1 35m Ci < LLD < LLD N/A N/A < LLD Xe-138 Ci < LLD < LLD N/A N/A < LLD Total Ci 8.50E-06 1.12E-05 N/A N/A 1.97E-05 H-3 Ci 1.79E+00 2.68E+00 N/A N/A 4.47E+00 Gross Alpha Ci < LLD < LLD N/A N/A < LLD Page 17

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC TABLE 2A-2 LIQUID EFFLUENTS - CONTINUOUS MODE PERIOD 2014 Fission and Activation Units Qtr I Qtr 2 Qtr 3 Qtr 4 Total Products Cr-51 Ci N/A N/A N/A N/A N/A Mn-54 Ci N/A N/A N/A N/A N/A Fe-55 Ci N/A N/A N/A N/A N/A Co-58 Ci N/A N/A N/A N/A N/A Fe-59 Ci N/A N/A N/A N/A N/A Co-60 Ci N/A N/A N/A N/A N/A Zn-65 Ci N/A N/A N/A N/A N/A Sr-89 Ci N/A N/A N/A N/A N/A Sr-90 Ci N/A N/A N/A N/A N/A Zr-95 Ci N/A N/A N/A N/A N/A Nb-95 Ci N/A N/A N/A N/A N/A Mo-99 Ci N/A N/A N/A N/A N/A Tc-99m Ci N/A N/A N/A N/A N/A Ag-110m Ci N/A N/A N/A N/A N/A 1-131 Ci N/A N/A N/A N/A N/A Cs-1 34 Ci N/A N/A N/A N/A N/A Cs-1 37 Ci N/A N/A N/A N/A N/A Ba-140 Ci N/A N/A N/A N/A N/A La-140 Ci N/A N/A N/A N/A N/A Ce-141 Ci N/A N/A N/A N/A N/A Total Ci N/A N/A N/A N/A N/A Dissolved and Units Qtr I Qtr 2 Qtr 3 Qtr 4 Total Entrained Gases Xe-131 m Ci N/A N/A N/A N/A N/A Xe-1 33 Ci N/A N/A N/A N/A N/A Xe-135 Ci N/A N/A N/A N/A N/A Total Ci N/A N/A N/A N/A N/A H-3 Ci N/A N/A N/A N/A N/A Gross Alpha Ci N/A N/A N/A N/A N/A Page 18

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Appendix B Solid Waste and Irradiated Fuel Shipments Page 19

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SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC A. Solid waste shipped offsite for burial or disposal (not irradiated fuel) 1/1/14- 12/31/14

1. Type of waste

b. Dry compressible waste, contaminated equipment,eI mCl 54.92 25%

etc. [Cil 00.39

c. Irradiated components, control rods, etc. m' None N/A Ci None

d. Other (Describe) m None N/A

" 71Ci I None

2. Estimate of Major Nuclide Composition (By Waste Type)

Category A - Spent Resin, Filters, Sludges, Evaporator Bottoms, etc.

Waste Class Waste Class A Percent B Percent Isotope Curies

Abundance Curies

Abundance C-14 5.85E+00 1.63% 2.61E-03 0.00%

Mn-54 2.01E+01 5.56% 9.1OE+00 2.28%

Fe-55 1.31 E+02 36.19% 1.03E+02 25.69%

Co-60 1.66E+02 45.86% 2.64E+02 65.84%

Cr-51 4.27E+00 1.18% 0.OOE+00 0.00%

Ni-63 7.69E+00 2.13% 3.12E+00 0.79%

Zn-65 1.47E+01 4.06% 1.47E+01 3.68%

Fe-59 6.72E-01 0.19% 0.00E+00 0.00%

Cs-137 5.21E+00 1.44% 4.40E+00 1.11%

Ce-144 5.32E-01 0.16% 0.00E+00 0.00%

Cs-134 2.16E-01 0.06% 2.38E+00 0.60%

H-3 3.61 E-01 0.10% 1.12E-02 0.00%

Co-58 5.22E+00 1.44% 0.OOE+00 0.01%

TOTALS 3.62E+02 100.00% 4.01E+02 100.00%

Activity is estimated Page 21

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

Waste Class A Percent Isotope Curies

Abundance Co-60 1.98E-01 50.92%

Cs-137 7.21 E-04 0.20%

Fe-55 1.43E-01 36.78%

Mn-54 1.57E-02 4.05%

Ni-63 1.99E-03 0.52%

Zn-65 1.14E-02 2.94%

Cr-51 1.58E-02 4.07%

Ce-144 2.OOE-03 0.52%

TOTALS 3.89E-01 100.00%

Activity is estimated

3. Solid Waste (Disposition)

Number of Shipments Mode of Transportation Destination 25 Truck Energy Solutions Bear Creek Operations Facility to Energy Solutions / Clive 22 Truck Limerick Gen. Sta. to Energy Solutions / Clive 1 Truck TOXCO Inc. to Energy Solutions / Clive 3 Truck Energy Solutions Barnwell Processing Facility to Energy Solutions / Clive 1 Truck Waste Control Specialists Andrews, TX Comments:

27 Shipments were made from Limerick to Energy Solution Processing Facility for processing 1 Shipment was made from Limerick to TOXCO Processing Facility for processing No solidifications were made.

Category A- 23 Shipments Type A LSA Category A- 4 Shipments >Type A LSA Category A- 3 Shipments Type B Category B- 21 Shipments Type A LSA Category C- No shipments made Category D- No shipments made B. Irradiated Fuel Shipments (disposition)

Number of Shipments Mode of Transportation Destination 0 N/A N/A Page 22

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC C. Changes to the Process Control Program Procedure RW-AA-100, "Process Control Program for Radioactive Wastes" was revised to Rev. 10. The revision provided definitions and procedure guidelines for additional processes available to classify Radioactive Waste. These processes include Concentration Averaging, Encapsulation, and Blending.

The three methods are used to average the Radioactivity in a container over the volume of the container to effectively manage waste for burial ALARA.

This revision also includes Waste Control Specialists (WCS) as another waste disposal site available to receive waste for burial. The PCP Rev. 10 also added wording to the review of vendor procedures; updated the references to include the applicable NRC documents and LaSalle's License Amendment.

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SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Appendix C Meteorological Data Page 25

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

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SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC LIST OF TABLES PAGE Table D - 1 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January - March, 2014 29 Table D - 2 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January - March, 2014 36 Table D - 3 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, April - June, 2014 43 Table D - 4 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, April - June, 2014 50 Table D - 5 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, July - September, 2014 57 Table D - 6 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, July - September, 2014 64 Table D - 7 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, October - December, 2014 71 Table D - 8 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, October - December, 2014 78 Table D - 9 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January - December, 2014 83 Table D - 10 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January - December, 2014 85 Table D - 11 Annual x/Q undepleted and D/Q values for the North Stack, Limerick Generating Station, 2014 87 Table D - 12 Annual x/Q undepleted and D/Q values for the South Stack, Limerick Generating Station, 2014 89 Page 27

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SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D- 1 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January - March, 2014 Limerick Tower 1 Period of Record: January - March 2014 Stability Class - Extremely Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 N 0 0 0 0 0 NNE 0 0 0 0 0 NE 0 0 0 0 0 ENE 0 0 0 0 0 E 0 0 0 0 0 ESE 0 0 0 0 0 SE 0 1 0 0 0 SSE 0 0 0 0 0 S 0 SSW 0 2 3 0 0 SW 0 1 0 0 0 WSW 0 0 0 0 0 W 0 0 1 0 0 WNW 0 0 0 2 1 NW 0 0 0 0 0 NNW 0 0 0 0 0 Variable 0 0 0 0 0 Total 1 3 4 2 1 0 11 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 19 Page 29

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D- 1 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January - March, 2014 Limerick Tower 1 Period of Record: January - March 2014 Stability Class - Moderately Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 NNE 0 0 0 NE 1 0 1 ENE 2 0 4 E 0 0 1 ESE 0 0 0 SE 0 0 0 SSE 0 0 0 S 0 0 0 SSW 0 0 6 SW 1 0 7 WSW 0 0 1 W 0 0 1 WNW 0 0 10 NW 0 0 4 NNW 0 0 0 Variable 0 0 0 Total 4 8 16 7 0 0 35 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: 19 Page 30

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D- 1 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January - March, 2014 Limerick Tower 1 Period of Record: January - March 2014 Stability Class - Slightly Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 NNE 0 0 NE 1 2 ENE 0 2 E 0 6 ESE 1 2 SE 1 1 SSE 0 1 S 0 4 SSW 0 5 SW 1 6 WSW 1 9 W 0 4 9 6 0 0 19 WNW 1 2 9 7 0 0 19 NW 0 2 7 6 2 0 17 NNW 0 0 0 0 0 0 0 Variable 1 0 0 0 0 0 1 Total 7 25 42 19 2 0 95 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stabil ity class: 1 Hours of missing stability measurements in all st ability classes: 19 Page 31

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D- 1 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January - March, 2014 Limerick Tower 1 Period of Record: January - March 2014 Stability Class - Neutral - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 16 14 28 5 0 0 63 NNE 10 32 31 0 0 0 73 NE 25 41 9 0 0 0 75 ENE 22 46 3 0 0 0 71 E 10 25 9 0 0 0 44 ESE 9 4 6 0 0 0 19 SE 8 2 0 0 0 0 10 SSE S 8 1 0 0 0 14 S 2 15 3 0 0 0 20 SSW 6 12 7 1 0 0 26 SW 5 17 6 1 0 0 29 WSW 13 10 5 2 0 0 30 W 16 24 26 4 0 0 70 WNW 18 42 72 47 4 1 184 NW 22 72 126 67 21 0 308 NNW 15 21 49 21 1 0 107 Variable 1 0 0 0 0 0 1 Total 203 385 381 148 26 1 1144 Hours of calm in this stability class: 3 Hours of missing wind measurements in this stability class: 7 Hours of missing stability measurements in all stability classes: 19 Page 32

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 1 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January - March, 2014 Limerick Tower 1 Period of Record: January - March 2014 Stability Class - Slightly Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 15 5 6 0 26 NNE 8 7 1 0 16 NE 15 1 0 0 16 ENE 9 2 0 0 11 E 9 9 10 0 28 ESE 5 6 1 0 12 SE 4 8 3 0 15 SSE 4 10 4 0 18 S S 11 7 0 24 SSW 14 20 8 0 43 SW 14 16 1 0 31 WSW 16 22 2 0 40 W 26 24 5 0 55 WNW 23 39 9 0 72 NW 23 26 20 0 70 NNW 18 20 13 0 53 Variable 2 0 0 0 2 Total 210 226 90 5 0 1 532 Hours of calm in this stability class: 11 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 19 Page 33

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D- 1 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January - March, 2014 Limerick Tower 1 P eriod of Record: January - March 2014 Stability Cl ass - Moderately Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 8 0 8 NNE 4 0 4 NE 3 0 3 ENE 5 0 6 E 6 0 7 ESE 1 0 1 SE 3 0 3 SSE 2 0 3 S 2 0 3 SSW 2 0 6 SW 7 0 13 WSW 8 0 9 W 9 4 1 0 0 0 14 WNW 17 4 1 1 0 0 23 NW 21 3 0 0 0 0 24 NNW 11 0 0 0 0 0 11 Variable 5 0 0 0 0 0 5 Total 114 25 3 1 0 0 143 Hours of calm in this stability class: 10 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 19 Page 34

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 1 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January - March, 2014 Limerick Tower 1 Period of Record: January - March 2014 Stability Class - Extremely Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 12 0 12 NNE 15 0 15 NE 10 0 10 ENE 14 0 15 E 9 0 11 ESE 6 0 7 SE 2 0 2 SSE 1 0 1 S 1 0 SSW 2 0 2 SW 3 0 3 WSW 3 0 3 W 9 0 9 WNW 9 0 12 NW 0 12 NNW 13 0 13 Variable 5 0 5 Total 125 0 133 Hours of calm in this stability class: 15 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 19 Page 35

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 2 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January - March, 2014 Limerick Tower 1 Period of Record: January - March 2014 Stability Class - Extremely Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

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

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 1 1 4 2 3 0 11 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 19 Page 36

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 2 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January - March, 2014 Limerick Tower 1 Period of Record: January - March 2014 Stability Class - Moderately Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 NNE 1 0 1 NE 0 1 ENE 1 0 4 E 0 0 0 ESE 0 0 SE 0 0 SSE 0 0 S 0 1 SSW 0 9 SW 0 4 WSW 0 0 W 0 3 WNW 0 9 NW 0 3 NNW 0 0 variable 0 0 Total 3 3 16 6 7 0 35 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 sta bility cl.asses: 19 Page 37

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 2 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January - March, 2014 Limerick Tower 1 Period of Record: January - March 2014 Stability Class - Slightly Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 NNE 0 NE 3 ENE 3 E 5 ESE 1 SE 0 SSE 1 S 4 SSW 8 SW 5 WSW 13 W 16 WNW 23 NW 12 NNW 0 Variable 0 Total 5 11 37 25 15 3 96 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: 19 Page 38

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 2 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January - March, 2014 Limerick Tower 1 Period of Record: January - March 2014 Stability Class - Neutral - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 9 12 25 29 3 0 78 NNE 9 10 30 15 0 0 64 NE 13 31 23 3 0 0 70 ENE 8 46 23 1 0 0 78 E 7 12 17 4 0 0 40 ESE 2 6 1 1 0 0 10 SE 4 2 0 0 0 0 6 SSE 2 9 6 0 0 0 17 S 5 7 11 7 1 0 31 SSW 5 10 11 9 1 0 36 SW 1 14 8 3 4 0 30 WSW 4 7 9 6 2 0 28 W 6 17 30 16 5 1 75 WNW 8 41 61 94 50 265 NW 7 20 64 56 28 24 199 NNW 3 4 23 36 16 0 82 Variable 1 0 0 0 0 0 1 Total 94 248 342 280 110 36 1110 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 44 Hours of missing stability measurements in all stability classes: 19 Page 39

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 2 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January - March, 2014 Limerick Tower 1 Period of Record: January - March 2014 Stability Class - Slightly Stable - 171Ft-26Ft Delta-T *(F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Directio n 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 7 5 6 0 0 21 NNE 6 6 2 2 0 0 16 NE 5 6 1 0 0 0 12 ENE 6 13 2 2 0 0 23 E 3 16 4 5 0 0 28 ESE 3 1 5 1 0 0 10 SE 5 5 3 0 0 0 13 SSE 4 5 13 0 0 0 22 S 0 5 19 8 4 0 36 SSW 2 16 20 12 2 0 52 SW 3 8 13 6 0 0 30 WSW 4 13 15 4 0 0 36 W 5 13 21 4 0 0 43 WNW 7 35 38 10 2 0 92 NW 4 10 28 14 1 58 NNW 6 6 17 8 1 0 38 Variable 0 0 0 0 0 0 0 Total 66 165 206 82 10 1 530 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 13 Hours of missing stability measurements in all stability classes: 19 Page 40

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 2 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January - March, 2014 Limerick Tower 1 P eriod of Record: January - March 2014 Stability Cl ass - Moderately Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 0 1 0 0 0 3 NNE 3 0 1 0 0 0 4 NE 4 1 0 0 0 6 ENE 4 4 0 0 0 0 8 E 1 2 0 0 0 0 3 ESE 0 1 1 0 0 0 2 SE 2 1 0 0 0 0 3 SSE 3 5 1 1 0 0 10 S 1 2 0 1 0 0 4 SSW 2 5 2 0 10 SW 3 4 7 0 15 WSW 1 7 4 0 12 W 8 5 0 15 WNW 7 12 8 0 29 NW 5 4 2 0 11 NNW 2 4 1 0 7 Variable 0 0 0 0 0 Total 41 60 34 0 142 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 9 Hours of missing stability measurements in all stability classes: 19 Page 41

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 2 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January - March, 2014 Limerick Tower 1 Period of Record: January - March 2014 Stability Class - Extremely Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 NNE 2 NE 6 ENE 7 E 10 ESE 10 SE 12 SSE 16 S 7 SSW 11 SW 11 WSW 8 W 12 WNW 18 NW 9 NNW 5 Variable 0 Total 62 72 12 2 0 0 148 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: 19 Page 42

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 3 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, April - June, 2014 Limerick Tower 1 Period of Record: April - June 2014 Stability Class - Extremely Unstable - l7lFt-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 1 0 0 0 1 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 3 3 0 0 0 6 SW 0 4 4 1 0 0 9 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 0 0 0 0 Total 0 7 8 1 0 0 16 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: 16 Page 43

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 3 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, April - June, 2014 Limerick Tower 1 Period of Record: April - June 2014 Stability Class - Moderately Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 0 1 NNE 0 0 0 NE 0 0 0 ENE 0 0 0 E 0 0 0 ESE 0 0 1 SE 0 0 1 SSE 0 0 0 S 0 0 1 SSW 13 0 16 SW 6 0 6 WSW 1 0 2 W 2 0 3 WNW 0 0 1 NW 0 0 2 NNW 0 0 0 Variable 0 0 0 Total 0 23 8 3 0 0 34 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 16 Page 44

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 3 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, April - June, 2014 Limerick Tower 1 Period of Record: April - June 2014 Stability Class - Slightly Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 2 NNE 4 0 4 NE 0 0 0 ENE 0 0 0 E 1 0 6 ESE 1 0 10 SE 1 0 3 SSE 0 0 0 S 2 0 3 SSW 6 0 13 SW 10 0 12 WSW 6 0 10 W 5 0 7 WNW 6 0 11 NW 5 0 11 NNW 1 0 3 Variable 0 0 0 Total 1 48 32 14 0 0 95 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 16 Page 45

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 3 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, April - June, 2014 Limerick Tower 1 Period of Record: April - June 2014 Stability Class - Neutral - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 16 19 1 39 NNE 3 13 8 0 24 NE 4 6 2 0 12 ENE 8 21 0 0 29 E 5 39 30 3 77 ESE 7 15 16 15 53 SE 3 8 7 1 19 SSE 6 12 2 5 25 S 13 14 2 0 29 SSW 15 30 13 2 60 SW 14 26 3 0 43 WSW 12 22 4 0 38 W 17 24 19 5 65 WNW 11 20 25 8 64 NW 4 47 72 44 173 NNW 5 17 48 8 78 Variable 0 0 0 0 0 Total 130 330 270 92 6 0 828 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: 16 Page 46

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 3 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, April - June, 2014 Limerick Tower 1 Period of Record: April - June 2014 Stability Class - Slightly Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 8 9 6 2 25 NNE 9 18 2 0 29 NE 10 13 1 0 24 ENE 20 18 2 0 40 E 8 72 37 10 128 ESE 4 14 16 3 37 SE 3 6 3 6 18 SSE 9 27 8 6 50 S 12 42 25 1 80 SSW 11 25 3 1 40 SW 22 19 0 0 41 WSW 5 6 1 0 12 W 15 25 4 0 44 WNW 28 51 18 1 98 NW 22 53 28 3 106 NNW 11 18 7 0 36 Variable 5 0 0 0 5 Total 202 416 161 33 1 0 813 Hours of calm in this stability class: 6 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 16 Page 47

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 3 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, April - June, 2014 Limerick Tower 1 Period of Record: April - June 2014 Stability Class - Moderately Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 11 0 13 NNE 10 0 15 NE 9 0 10 ENE 7 0 7 E 6 0 7 ESE 4 0 7 SE 4 0 5 SSE 1 0 4 S 3 0 5 SSW 3 0 8 SW 7 0 10 WSW 6 0 8 W 22 0 27 WNW 25 11 0 0 0 0 36 NW 27 11 0 0 0 0 38 NNW 10 1 0 0 0 0 11 Variable 5 0 0 0 0 0 5 Total 160 53 3 0 0 0 216 Hours of calm in this stability class: 11 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 16 Page 48

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 3 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, April - June, 2014 Limerick Tower 1 Period of Record: April - June 2014 Stability Class - Extremely Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 18 0 1 0 0 0 19 NNE 7 0 0 0 0 0 7 NE 5 0 0 0 0 0 5 ENE 4 0 0 0 0 0 4 E 1 0 0 0 0 0 1 ESE 2 0 0 0 0 0 2 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 2 0 0 0 0 0 2 SW 1 0 0 0 0 0 1 WSW 5 0 0 0 0 0 5 W 6 0 0 0 0 0 6 WNW 23 5 0 0 0 0 28 NW 29 3 0 0 0 0 32 NNW 16 0 0 0 0 0 16 Variable 5 0 0 0 0 0 5 Total 124 8 1 0 0 0 133 Hours of calm in this stability class: 15 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 16 Page 49

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 4 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, April - June, 2014 Limerick Tower 1 Period of Record: April - June 2014 Stability Class - Extremely Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NE 0 ENE 0 E 1 ESE 0 SE 0 SSE 0 S 1 SSW 10 SW 4 WSW 0 W 0 WNW 0 NW 0 NNW 0 Variable 0 Total 0 1 9 5 1 0 16 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: 16 Page 50

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 4 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, April - June, 2014 Limerick Tower 1 Period of Record: April - June 2014 Stability Class - Moderately Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 0 0 0 0 1 NNE 0 0 0 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 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 1 0 0 0 1 S 0 0 2 1 0 0 3 SSW 0 2 12 2 0 0 16 SW 0 1 4 0 0 0 5 WSW 0 0 2 0 0 0 2 W 0 0 0 0 2 WNW 0 0 0 0 0 2 2 NW 0 0 0 0 0 1 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 5 22 4 2 34 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 16 Page 51

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 4 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, April - June, 2014 Limerick Tower 1 Period of Record: April - June 2014 Stability Class - Slightly Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 0 1 0 0 2 NNE 0 2 1 0 0 0 3 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 1 E 0 0 6 3 0 0 9 ESE 0 1 1 3 0 0 5 SE 0 1 1 2 0 0 4 SSE 0 0 0 0 0 0 0 S 0 1 1 2 0 0 4 SSW 0 4 4 1 3 3 15 SW 0 6 6 0 0 0 12 WSW 0 5 1 3 0 0 9 W 0 4 6 1 0 0 11 WNW 0 2 5 0 1 0 8 NW 0 2 1 3 2 0 8 NNW 0 0 3 1 0 0 4 Variable 0 0 0 0 0 0 0 Total 0 30 36 20 6 3 95 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 16 Page 52

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 4 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, April - June, 2014 Limerick Tower 1 Period of Record: April - June 2014 Stability Class - Neutral - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 8 20 8 0 40 NNE 2 11 10 2 0 25 NE 2 7 2 0 0 11 ENE 4 27 4 0 0 35 E 4 17 34 20 2 77 ESE 1 13 10 13 4 41 SE 3 8 6 2 1 20 SSE 4 7 6 1 5 23 S 5 13 14 5 0 37 SSW 12 22 20 9 7 70 SW 7 14 20 2 1 44 WSW 7 23 10 4 1 45 W 10 13 20 18 4 65 WNW 3 23 38 18 16 102 NW 2 9 37 58 18 131 NNW 4 6 27 25 0 62 Variable 0 0 0 0 0 0 Total 74 221 278 185 59 11 828 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: 16 Page 53

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 4 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, April - June, 2014 Limerick Tower 1 Period of Record: April - June 2014 Stability Class - Slightly Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 9 11 5 1 0 28 NNE 6 13 5 0 0 24 NE 11 11 0 0 0 26 ENE 25 7 1 0 0 40 E 17 66 31 7 0 124 ESE 6 28 6 0 0 44 SE 4 2 4 2 0 12 SSE 15 17 10 6 0 51 S 17 38 28 3 0 88 SSW 18 31 7 1 0 61 SW 13 16 2 0 0 35 WSW 6 13 2 0 0 26 W 15 11 5 0 0 35 WNW 37 55 27 2 0 126 NW 15 39 14 2 0 72 NNW 11 10 5 0 0 28 Variable 0 0 0 0 0 0 Total 51 225 368 152 24 0 820 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: 16 Page 54

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 4 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, April - June, 2014 Limerick Tower 1 Period of Record: April - June 2014 Stability Class - Moderately Stable - l7lFt-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 2 0 0 0 4 NNE 1 5 12 0 0 0 18 NE 2 5 0 0 0 8 ENE 6 2 0 0 0 0 8 E 0 2 0 0 0 0 2 ESE 3 3 2 0 0 0 8 SE 1 2 2 0 0 0 5 SSE 5 6 1 0 0 0 12 S 2 2 3 0 0 8 SSW 1 5 3 0 11 SW 2 8 4 0 14 WSW 3 7 7 0 17 W 2 11 7 0 21 WNW 4 24 21 0 50 NW 3 12 12 0 27 NNW 1 7 5 0 13 Variable 0 0 0 0 0 Total 36 103 80 0 226 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 16 Page 55

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 4 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, April - June, 2014 Limerick Tower 1 Period of Record: April - June 2014 Stability Class - Extremely Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 3 0 0 7 NNE 3 1 0 0 4 NE 8 1 0 0 9 ENE 0 0 0 E 0 0 0 ESE 2 2 0 5 SE 2 1 0 0 3 SSE 6 0 0 0 6 S 2 3 0 0 5 SSW 0 0 0 0 0 SW 0 1 0 0 1 WSW 5 0 0 6 W 3 9 0 0 12 WNW 2 24 11 0 0 38 NW 6 17 16 0 0 0 39 NNW 2 6 3 0 0 0 11 Variable 0 0 0 0 0 0 0 Total 41 74 31 2 0 0 148 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: 16 Page 56

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 5 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, July- September, 2014 Limerick Tower 1 Period of Record: July - September 2014 Stability Class - Extremely Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 1 0 0 0 0 ENE 0 2 0 0 0 0 2 E 0 0 0 0 0 1 ESE 0 1 0 0 0 2 SE 0 0 2 0 0 0 2 SSE 0 0 0 0 0 0 0 S 0 2 2 0 0 0 4 SSW 0 11 2 0 13 SW 0 19 2 0 21 WSW 0 18 2 0 20 W 0 9 2 0 11 WNW 0 5 4 0 9 NW 0 2 0 0 2 NNW 0 1 0 0 1 Variable 0 0 0 0 0 Total 0 71 18 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: 21 Page 57

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 5 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, July - September, 2014 Limerick Tower 1 Period of Record: July - September 2014 Stability Class - Moderately Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 3 NNE 0 1 NE 0 4 ENE 0 3 E 0 6 ESE 0 3 SE 0 0 SSE 0 0 S 0 5 SSW 0 12 SW 2 10 0 0 0 0 12 WSW 1 17 3 0 0 0 21 W 1 8 0 0 0 0 9 WNW 1 4 1 1 0 0 7 NW 0 10 8 0 0 0 18 NNW 0 4 1 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 7 78 23 1 0 0 109 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 4 Hours of missing stability measurements in all stability classes: 21 Page 58

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 5 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, July- September, 2014 Limerick Tower 1 Period of Record: July - September 2014 Stability Class - Slightly Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Directi on 1-3 4-7 8-12 13-18 19-24 > 24 Total N 7 2 0 0 0 10 NNE 0 5 0 0 0 0 5 NE 0 4 0 0 0 0 4 ENE 4 2 0 0 0 7 E 1 6 4 0 0 0 ii ESE 3 0 0 0 0 4 SE I 0 0 0 0 2 SSE 0 0 0 0 2 S 0 4 1 0 0 0 5 SSW 5 S 5 0 0 0 15 SW 4 13 3 0 0 0 20 WSW 5 15 2 0 0 0 22 W 8 10 0 0 0 19 WNW 6 9 3 1 0 0 19 NW 1 18 10 0 0 30 NNW 0 7 7 0 0 0 14 Variable 0 0 0 0 0 0 0 Total 35 112 40 2 0 0 189 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 9 Hours of missing stability measurements in all stability classes: 21 Page 59

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 5 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, July- September, 2014 Limerick Tower 1 Period of Record: July - September 2014 Stability Class - Neutral - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 8 17 9 34 NNE 8 21 2 31 NE 13 19 6 38 ENE 11 27 0 38 E 5 28 17 50 ESE 2 12 17 31 SE 5 2 1 8 SSE 2 9 0 11 S 8 26 6 40 SSW 10 31 3 44 SW 18 21 5 44 WSW 13 18 3 34 W 17 26 3 46 WNW 18 13 2 34 NW 15 36 19 75 NNW 11 27 17 62 Variable 2 1 0 3 Total 166 334 110 13 0 0 623 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 20 Hours of missing stability measurements in all stability classes: 21 Page 60

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 5 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, July- September, 2014 Limerick Tower 1 Period of Record: July - September 2014 Stability Class - Slightly Stable - l7lFt-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 22 9 1 0 0 0 32 NNE 21 8 0 0 0 30 NE 21 4 0 0 0 0 25 ENE 18 11 0 0 0 0 29 E 13 26 2 0 0 0 41 ESE 9 12 4 0 0 0 25 SE 4 9 4 0 0 0 17 SSE 9 10 0 0 0 0 19 S 18 36 0 0 0 55 SSW 23 35 3 0 0 0 61 SW 20 17 0 0 0 0 37 WSW 24 8 1 0 0 0 33 W 31 17 0 0 0 0 48 WNW 28 27 1 0 0 0 56 NW 25 40 8 0 0 0 73 NNW 16 20 4 0 0 0 40 Variable 7 0 0 0 0 0 7 Total 309 289 30 0 0 0 628 Hours of calm in this stability class: 22 Hours of missing wind measurements in this stability class: 22 Hours of missing stability measurements in all stability classes: 21 Page 61

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 5 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, July- September, 2014 Limerick Tower 1 Period of Record: July - September 2014 Stability Class - Moderately Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 12 12 NNE 10 10 NE 12 12 ENE 2 2 E 1 1 ESE 5 7 SE 3 3 SSE 2 2 S 4 4 SSW 7 7 SW 10 11 WSW 11 13 W 35 36 WNW 47 55 NW 36 41 NNW 19 21 Variable 10 10 Total 226 21 0 0 0 0 247 Hours of calm in this stability class: 35 Hours of missing wind measurements in this stability class: 8 Hours of missing stability measurements in all stability classes: 21 Page 62

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 5 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, July - September, 2014 Limerick Tower 1 Period of Record: July - September 2014 Stability Class - Extremely Stable - 171Ft -26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Directio)n 1-3 4-7 8-12 13-18 19-24 > 24 Total N 12 12 NNE 7 7 NE 3 3 ENE 7 7 E 0 0 ESE 0 0 SE 0 0 SSE 0 0 S 0 0 SSW 0 0 SW 2 2 WSW 3 3 W 15 15 WNW 25 26 NW 33 34 NNW 19 19 Variable 1 1 Total 127 2 0 0 0 0 129 Hours of calm in this stability class: 52 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 21 Page 63

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 6 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, July- September, 2014 Limerick Tower 1 Period of Record: July - September 2014 Stability Class - Extremely Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 NNE 0 0 NE 0 0 ENE 2 3 E 1 1 ESE 1 1 SE 1 1 SSE 1 1 S 4 6 SSW 11 15 SW 11 20 WSW 12 16 W 3 6 WNW 8 9 NW 2 2 NNW 0 1 Variable 0 0 Total 0 20 57 5 0 0 82 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 7 Hours of missing stability measurements in all stability classes: 21 Page 64

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 6 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, July - September, 2014 Limerick Tower 1 Period of Record: July - September 2014 Stability Class - Moderately Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 1 0 2 NNE 0 1 0 0 1 NE 0 5 0 0 5 ENE 0 2 0 0 2 E 0 3 3 1 7 ESE 0 1 2 0 3 SE 0 0 0 0 0 SSE 0 0 0 0 0 S 0 2 2 3 7 SSW 0 2 7 2 11 SW 0 6 4 2 12 WSW 1 8 8 0 17 W 1 3 6 1 14 WNW 1 1 5 1 8 NW 0 6 9 2 17 NNW 1 0 1 1 3 Variable 0 0 0 0 0 Total 4 41 48 13 3 0 109 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 4 Hours of missing stability measurements in all stability classes: 21 Page 65

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 6 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, July - September, 2014 Limerick Tower 1 Period of Record: July - September 2014 Stability Class - Slightly Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 6 10 NNE 1 3 NE 0 7 ENE 2 6 E 5 13 ESE 2 4 SE 0 1 SSE 0 4 S 4 6 SSW 3 13 SW 10 23 WSW 4 19 W 2 13 WNW 6 23 NW 9 29 NNW 8 14 Variable 0 1 Total 23 73 62 30 1 0 189 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 9 Hours of missing stability measurements in all stability classes: 21 Page 66

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 6 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, July- September, 2014 Limerick Tower 1 Period of Record: July - September 2014 Stability Class - Neutral - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 6 7 14 3 30 NNE 7 11 10 0 28 NE 5 17 15 2 39 ENE 4 25 11 0 40 E 3 20 14 11 48 ESE 1 6 15 9 31 SE 2 1 1 3 7 SSE 3 5 4 0 12 S 4 6 28 6 44 SSW 7 11 28 8 54 SW 7 14 12 6 40 WSW 7 20 7 0 34 W 6 14 12 0 33 WNW 8 20 10 7 48 NW 10 20 23 16 71 NNW 9 14 23 7 57 Variable 1 0 0 0 1 Total 90 211 227 78 11 0 617 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 27 Hours of missing stability measurements in all stability classes: 21 Page 67

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 6 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, July - September, 2014 Limerick Tower 1 Period of Record: July - September 2014 Stability Class - Slightly Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 11 11 1 25 NNE 4 16 3 1 24 NE 14 16 2 0 32 ENE 4 20 8 0 32 E 10 9 11 0 30 ESE 8 10 15 5 38 SE 3 7 13 1 24 SSE 1 8 6 0 15 S 4 18 41 2 65 SSW 5 25 27 13 70 SW 6 21 11 4 42 WSW 2 19 8 0 30 W 3 19 9 2 33 WNW 4 14 23 5 46 NW 8 30 27 5 70 NNW 4 9 24 2 39 Variable 0 0 0 0 0 Total 82 252 239 41 1 0 615 Hours of calm in this stability class: 2 Hours of missing wind measurements in this stability class: 55 Hours of missing stability measurements in all stability classes: 21 Page 68

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 6 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, July - September, 2014 Limerick Tower 1 Period of Record: July - September 2014 Stability Class - Moderately Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 9 3 13 NNE 15 1 20 NE 6 0 6 ENE 3 0 4 E 2 2 8 ESE 1 0 5 SE 0 1 4 SSE 7 1 12 S 2 0 8 SSW 5 4 11 SW 10 4 19 WSW 10 4 22 W 7 0 10 WNW 32 16 51 NW 46 15 63 NNW 11 4 17 Variable 0 0 1 Total 53 166 55 0 0 0 274 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 15 Hours of missing stability measurements in all stability classes: 21 Page 69

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 6 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, July- September, 2014 Limerick Tower 1 Period of Record: July - September 2014 Stability Class - Extremely Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 0 4 NNE 2 0 5 NE 2 0 5 ENE 2 0 5 E 1 0 1 ESE 2 0 3 SE 3 0 4 SSE 3 0 3 S 2 0 2 SSW 2 0 3 SW 4 0 9 WSW 4 0 11 W 4 8 0 0 0 0 12 WNW 16 31 19 0 0 0 .66 NW 3 23 11 0 0 0 37 NNW 5 5 0 0 0 0 10 Variable 0 0 0 0 0 0 0 Total 58 89 33 0 0 0 180 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 21 Page 70

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 7 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, October - December, 2014 Limerick Tower 1 Period of Record: October - December 2014 Stability Class - Extremely Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 NNE 0 0 0 NE 0 0 0 ENE 0 0 0 E 0 0 0 ESE 0 0 0 SE 0 0 0 SSE 0 0 0 S 0 0 1 SSW 0 0 2 SW 0 0 6 WSW 0 0 3 W 0 0 0 WNW 0 0 0 NW 0 0 0 NNW 0 0 0 Variable 0 0 0 Total 0 2 10 0 0 0 12 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 32 Page 71

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 7 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, October- December, 2014 Limerick Tower 1 Period of Record: October - December 2014 Stability Class - Moderately Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 NNE 0 0 0 0 0 NE 1 0 0 0 ENE 1 0 0 0 1 E 0 0 0 0 0 ESE 0 0 1 0 SE 0 0 0 1 SSE 0 1 0 0 1 S 0 1 0 2 SSW 0 2 I 0 4 SW 0 4 0 5 WSW 0 0 3 0 3 W 0 1 5 0 7 WNW 0 1 1 1 0 3 NW 0 0 0 0 0 1 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 2 10 14 4 0 0 30 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 sta bility classes: 32 Page 72

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 7 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, October- December, 2014 Limerick Tower 1 Period of Record: October - December 2014 Stability Class - Slightly Unstable 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 NNE 1 0 0 1 NE 0 1 0 1 ENE 0 0 0 0 E 0 0 0 0 ESE 0 0 0 1 SE 0 0 2 SSE 0 0 0 0 S 0 0 3 SSW 0 2 0 3 SW 0 2 0 4 WSW 0 2 0 3 W 0 3 7 0 10 WNW 1 5 13 7 0 0 26 NW 0 5 5 7 0 0 17 NNW 0 0 0 1 0 0 1 Variable 0 0 0 0 0 0 0 Total 2 24 31 16 0 0 73 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: 32 Page 73

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 7 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, October - December, 2014 Limerick Tower 1 Period of Record: October - December 2014 Stability Class - Neutral - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 18 27 25 1 71 NNE 15 31 26 0 72 NE 11 34 1 0 46 ENE 10 35 1 0 46 E 10 13 5 0 28 ESE 3 7 3 0 13 SE 5 10 15 1 31 SSE 4 10 18 0 32 S 14 8 7 1 30 SSW 5 17 3 1 26 SW 9 12 4 0 25 WSW 3 10 2 0 15 W 10 16 45 6 77 WNW 5 61 87 36 189 NW 9 65 141 56 273 NNW 11 21 46 20 102 Variable 0 0 0 0 0 Total 142 377 429 122 6 0 1076 Hours of calm in this stability class: 4 Hours of missing wind measurements in this stability class: 3 Hours of missing stability measurements in all stability classes: 32 Page 74

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 7 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, October - December, 2014 Limerick Tower 1 Period of Record: October - December 2014 Stability Class - Slightly Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 10 8 2 0 0 0 20 NNE 19 8 1 0 0 0 28 NE 21 5 0 0 0 0 26 ENE 24 12 0 0 0 0 36 E 10 11 3 0 0 0 24 ESE 5 8 5 0 0 19 SE 5 10 9 0 0 0 24 SSE 8 14 11 0 0 33 S 7 22 6 0 0 35 SSW 15 34 5 0 0 54 SW 13 14 4 0 0 31 WSW 21 11 1 0 34 W 27 27 4 0 0 58 WNW 32 61 19 0 0 112 NW 21 18 10 1 0 50 NNW 16 6 1 0 0 23 Variable 3 0 0 0 0 3 Total 257 269 81 3 0 610 Hours of calm in this stability class: 8 Hours of missing wind measurements in this stabil ity class: 3 Hours of missing stability measurements in all st ability classes: 32 Page 75

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 7 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, October - December, 2014 Limerick Tower 1 Period of Record: October - December 2014 Stability Class - Moderately Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 6 6 NNE 5 5 NE 6 6 ENE 7 7 E 1 1 ESE 6 8 SE 2 3 SSE 2 2 S 4 4 SSW 2 6 SW 6 6 WSW 6 8 W 18 22 WNW 30 37 NW 18 22 NNW 9 10 Variable 5 5 Total 133 25 0 0 0 0 158 Hours of calm in this stability class: 23 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 32 Page 76

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 7 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, October - December, 2014 Limerick Tower 1 Period of Record: October - December 2014 Stability Class - Extremely Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 30 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 13 13 NNE 4 4 NE 3 3 ENE 8 8 E 3 3 ESE 0 0 SE 0 0 SSE 1 1 S 0 0 SSW 2 2 SW 4 4 WSW 4 4 W 18 19 WNW 29 29 NW 21 21 NNW 15 15 Variable 4 4 Total 129 1 0 0 0 0 130 Hours of calm in this stability class: 45 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 32 Page 77

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 8 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, October - December, 2014 Limerick Tower 1 Period of. Record: October - December 2014 Stability Class - Extremely Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 NNE 0 0 NE 0 0 ENE 0 0 E 0 0 ESE 0 0 SE 0 0 SSE 0 0 S 0 2 SSW 0 3 SW 0 8 WSW 0 0 W 0 0 WNW 0 0 NW 0 0 NNW 0 0 Variable 0 0 Total 0 13 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 32 Page 78

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 8 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, October- December, 2014 Limerick Tower 1 Period of Record: October - December 2014 Stability Class - Moderately Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

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

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 2 4 11 10 2 1 30 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 32 Page 79

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 8 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, October - December, 2014 Limerick Tower 1 Period of Record: October - December 2014 Stability Class - Slightly Unstable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 0 0 1 NNE 1 0 0 0 1 NE 0 1 0 2 ENE 0 0 0 E 0 0 0 ESE 0 0 1 SE 0 0 1 SSE 0 0 1 S 0 0 3 SSW 0 0 4 SW 0 0 4 WSW 0 0 5 W 0 0 10 WNW 0 2 7 10 5 1 25 NW 0 2 3 5 5 0 15 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 1 11 23 24 13 1 73 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: 32 Page 80

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 8 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, October - December, 2014 Limerick Tower 1 Period of Record: October - December 2014 Stability Class - Neutral - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 8 19 21 17 1 0 66 NNE 6 24 23 29 0 0 82 NE 6 20 14 1 0 0 41 ENE 7 32 15 0 0 0 54 E 5 11 11 0 0 0 27 ESE 5 10 0 2 0 0 17 SE 1 9 4 14 1 0 29 SSE 2 5 8 16 0 0 31 S 3 17 13 6 1 0 40 SSW 2 16 3 3 1 34 SW 2 10 6 4 1 0 23 WSW 3 6 2 0 0 14 W 2 12 16 41 3 0 74 WNW 1 15 87 98 39 0 240 NW 3 11 60 97 27 5 203 NNW 4 9 22 39 21 3 98 Variable 0 0 0 0 0 0 0 Total 60 216 322 369 97 9 1073 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 9 Hours of missing stability measurements in all stability classes: 32 Page 81

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 8 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, October - December, 2014 Limerick Tower 1 Period of Record: October - December 2014 Stability Class - Slightly Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 7 3 6 1 0 17 NNE 10 9 6 1 0 26 NE 10 12 5 0 0 27 ENE 8 16 2 0 0 26 E 11 10 10 1 0 32 ESE 5 12 0 3 1 21 SE 3 5 5 11 0 24 SSE 2 6 12 7 0 27 S 4 13 30 7 2 56 SSW 2 17 25 15 0 59 SW 2 18 14 5 1 40 WSW 2 15 14 1 0 33 W 5 17 19 3 0 44 WNW 4 40 56 19 0 119 NW 5 15 21 5 0 46 NNW 1 7 7 1 0 16 Variable 0 0 0 0 0 0 Total 81 215 232 80 4 1 613 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: 32 Page 82

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 8 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, October - December, 2014 Limerick Tower 1 Period of Record: October - December 2014 Stability Class - Moderately Stable 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 7 NNE 10 11 NE 1 4 ENE 1 4 E 2 8 ESE 0 3 SE 4 6 SSE 6 10 S 3 7 SSW 2 6 SW 9 15 WSW 10 14 W 10 19 WNW 19 38 NW 9 16 NNW 4 9 Variable 0 0 Total 40 94 41 2 0 0 177 Hours of calm in this stability class: 3 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 32 Page 83

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 8 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, October - December, 2014 Limerick Tower 1 Period of Record: October - December 2014 Stability Class - Extremely Stable - 171Ft-26Ft Delta-T (F)

Winds Measured at 175 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 0 3 NNE 4 0 7 NE 1 1 4 ENE 4 0 6 E 1 0 7 ESE 3 0 4 SE 0 0 1 SSE 2 0 4 S 1 0 5 SSW 5 1 9 SW 8 1 17 WSW 11 1 17 W 18 1 23 WNW 24 38 NW 6 3 12 NNW 8 0 11 Variable 0 0 2 Total 53 98 19 0 0 0 170 Hours of calm in this stability class: 4 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 32 Page 84

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 9 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January - December, 2014 Limerick Tower 1 January-December, 2014 30 ft. Wind Speed and Direction l7lFt-26Ft Delta-T (F)

Number of Observations = 8393 Values are Percent Occurrence SPEED ---------------------------------- WIND DIRECTION CLASSES STABILITY CLASSES-----------

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL EU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 MU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 SU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 N 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 SS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.20 0.20 MS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.30 0.30 ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.18 0.18 0.74 EU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 MU 0.00 0.00 0.04 0.04 0.00 0.00 0.00 0.00 0.00 0.01 0.04 0.01 0.01 0.01 0.00 0.00 0.15 0.15 SU 0.01 0.01 0.01 0.01 0.01 0.02 0.02 0.01 0.00 0.06 0.07 0.07 0.10 0.10 0.01 0.00 0.52 0.52 N 0.54 0.43 0.63 0.61 0.36 0.25 0.25 0.20 0.44 0.43 0.55 0.49 0.71 0.62 0.60 0.50 7.60 7.60 SS 0.66 0.68 0.80 0.85 0.48 0.27 0.19 0.36 0.50 0.75 0.82 0.79 1.18 1.32 1.08 0.73 11.45 11.45 MS 0.44 0.35 0.36 0.25 0.17 0.19 0.14 0.08 0.15 0.17 0.36 0.37 1.00 1.42 1.22 0.58 7.24 7.24 ES 0.66 0.39 0.25 0.39 0.15 0.10 0.02 0.02 0.01 0.07 0.12 0.18 0.57 1.02 1.12 0.75 5.84 5.84 32.82 EU 0.00 0.00 0.01 0.02 0.00 0.01 0.00 0.00 0.02 0.19 0.31 0.21 0.11 0.06 0.02 0.01 0.99 0.99 MU 0.04 0.01 0.04 0.05 0.05 0.02 0.00 0.01 0.02 0.32 0.29 0.21 0.13 0.06 0.12 0.05 1.42 1.42 SU 0.10 0.11 0.07 0.07 0.08 0.06 0.04 0.02 0.12 0.20 0.33 0.31 0.26 0.26 0.36 0.10 2.49 2.49 N 0.88 1.16 1.19 1.54 1.25 0.45 0.26 0.46 0.75 1.07 0.91 0.71 1.07 1.62 2.62 1.02 16.98 16.98 SS 0.37 0.49 0.27 0.51 1.41 0.48 0.39 0.73 1.32 1.36 0.79 0.56 1.11 2.12 1.63 0.76 14.30 14.30 MS 0.02 0.06 0.01 0.01 0.02 0.08 0.02 0.02 0.01 0.15 0.12 0.08 0.17 0.36 0.27 0.05 1.48 1.48 ES 0.00 0.00 0.00 0.01 0.02 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.11 0.05 0.00 0.21 0.21 37.86 EU 0.00 0.00 0.00 0.00 0.02 0.01 0.02 0.00 0.04 0.12 0.12 0.06 0.04 0.05 0.00 0.00 0.48 0.48 MU 0.01 0.00 0.00 0.01 0 .04 0.04 0.02 0.00 0.07 0.11 0.04 0.10 0.07 0.08 0.13 0.01 0.73 0.73 SU 0.06 0.00 0.00 0.02 0.15 0.11 0.02 0.00 0.06 0.11 0.10 0.14 0.23 0.35 0.27 0.11 1.73 1.73 N 0.97 0.80 0.21 0.05 0.73 0.50 0.27 0.25 0.21 0.31 0.21 0.17 1.11 2.22 4.27 1.91 14.18 14.18 SS 0.18 0.06 0.01 0.02 0.62 0.31 0.23 0.27 0.46 0.23 0.06 0.06 0.15 0.56 0.79 0.30 4.31 4.31 MS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.02 0.00 0.00 0.00 0.01 0.01 0.00 0.00 0.07 0.07 ES 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.02 0.02 21.52 EU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.02 0.00 0.00 0.04 0.04 MU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.02 0.10 0.05 0.00 0.18 0.18 SU 0.00 0.00 0.00 0.00 0.02 0.01 0.01 0.00 0.00 0.06 0.00 0.00 0.07 0.19 0.23 0.01 0.61 0.61 N 0.08 0.00 0.00 0.00 0.04 0.18 0.02 0.06 0.01 0.05 0.01 0.02 0.18 1.10 2.05 0.67 4.47 4.47 SS 0.02 0.00 0.00 0.00 0.12 0.05 0.07 0.07 0.02 0.02 0.00 0.01 0.00 0.02 0.05 0.02 0.49 0.49 MS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.01 0.01 ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.79 Page 83

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 9 Wind Speed by Direction Measured at 30 Feet for Various Stability Classes for the Limerick Generating Station, January - December, 2014 Limerick Tower 1 January-December, 2014 30 ft. Wind Speed and Direction l7lFt-26Ft Delta-T (F)

SPEED WIND DIRECTION

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

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL EU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.01 0.01 1 MU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 9 SU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.00 0.02 0.02

- N 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.35 0.06 0.45 0.45 2 SS 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 4 MS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.50 EU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 G MU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 T SU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 N 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.01 0.01 2 SS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.01 0.01 4 MS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 TOT 5.04 4.54 3.91 4.47 5.75 3.16 2.03 2.62 4.27 5.80 5.24 4.56 8.32 13.86 17.32 7.64 99.26 1.53 2.48 5.39 43.74 30.78 9.10 6.26 99.26 Wind Direction by Stability N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL -STABILITY CLASSES-0.00 0.00 0.01 0.02 0.02 0.02 0.02 0.01 0.06 0.31 0.44 0.27 0.14 0.14 0.02 0.01 1.53 Extremely Unstable 0.05 0.01 0.07 0.10 0.08 0.06 0.02 0.01 0.10 0.45 0.36 0.32 0.24 0.25 0.30 0.06 2.48 Moderately Unstable 0.17 0.12 0.08 0.11 0.27 0.20 0.10 0.04 0.18 0.43 0.50 0.52 0.66 0.89 0.89 0.21 5.39 Slightly Unstable 2.47 2.38 2.04 2.19 2.37 1.38 0.81 0.98 1.42 1.86 1.68 1.39 3.07 5.61 9.88 4.16 43.74 Neutral 1.23 1.23 1.08 1.38 2.63 1.11 0.88 1.43 2.31 2.36 1.67 1.42 2.44 4.03 3.56 1.81 30.78 Slightly Stable 0.46 0.41 0.37 0.26 0.19 0.27 0.17 0.13 0.19 0.32 0.48 0.45 1.18 1.80 1.49 0.63 9.10 Moderately Stable 0.67 0.39 0.25 0.41 0.18 0.11 0.02 0.02 0.01 0.07 0.12 0.18 0.58 1.13 1.18 0.75 6.26 Extremely Stable Wind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL -WIND SPEED CLASSES-0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.74 CALM 2.30 1.86 2.09 2.14 1.17 0.83 0.63 0.69 1.11 1.49 1.95 1.91 3.57 4.49 4.03 2.56 32.82 < 3.5 mph 1.41 1.82 1.60 2.22 2.84 1.12 0.71 1.25 2.25 3.30 2.74 2.10 2.86 4.59 5.08 1.99 37.86 3.6 - 7.5 mph 1.23 0.86 0.23 0.11 1.56 0.97 0.57 0.55 0.87 0.87 0.52 0.52 1.61 3.26 5.47 2.32 21.52 7.6 - 12.5 mph 0.11 0.00 0.00 0.00 0.18 0.24 0.11 0.13 0.04 0.14 0.02 0.04 0.27 1.44 2.37 0.70 5.79 12.6 - 18.5 mph 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.37 0.06 0.50 18.6 - 24.5 mph 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.00 0.02 > 24.5 mph Page 84

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 10 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January - December, 2014 Limerick Tower 1 January-December, 2014 175 ft. Wind Speed end Direction l7lFt-26Ft Delta-T (F)

Number of Observations = 8462 Values are Percent Occurrence SPEED---------------------- -------- WIND DIRECTION CLASSES------------------------------------- STABILITY CLASSES-----------

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL EU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 MU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 C SU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 A N 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.04 0.04 L SS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 M MS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.02 0.08 EU 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 MU 0.00 0.02 0.02 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.00 0.01 0.11 0.11 1 SU 0.02 0.02 0.02 0.00 0.01 0.00 0.00 0.04 0.00 0.01 0.04 0.02 0.05 0.05 0.05 0.00 0.33 0.33

- N 0.32 0.28 0.31 0.27 0.22 0.11 0.12 0.13 0.20 0.31 0.20 0.25 0.28 0.24 0.26 0.24 3.73 3.73 3 SS 0.17 0.24 0.39 0.30 0.32 0.24 0.13 0.12 0.12 0.15 0.18 0.15 0.20 0.24 0.22 0.15 3.31 3.31 MS 0.07 0.09 0.09 0.17 0.13 0.12 0.09 0.17 0.14 0.09 0.15 0.18 0.09 0.18 0.14 0.08 2.00 2.00 ES 0.11 0.11 0.19 0.11 0.11 0.13 0.12 0.20 0.13 0.13 0.19 0.13 0.19 0.31 0.20 0.17 2.51 2.51 11.99 EU 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 0.05 0.09 0.05 0.04 0.01 0.00 0.01 0.26 0.26 MU 0.02 0.01 0.06 0.02 0.04 0.01 0.00 0.01 0.04 0.09 0.09 0.09 0.05 0.01 0.07 0.00 0.63 0.63 4 SU 0.06 0.04 0.11 0.08 0.08 0.04 0.02 0.04 0.01 0.13 0.14 0.22 0.14 0.17 0.15 0.05 1.48 1.48

- N 0.54 0.66 0.89 1.54 0.71 0.41 0.24 0.31 0.51 0.61 0.61 0.63 0.66 1.17 0.71 0.39 10.59 10.59 7 SS 0.35 0.44 0.53 0.87 0.61 0.34 0.25 0.40 0.63 0.90 0.71 0.63 0.76 1.49 0.83 0.39 10.13 10.13 MS 0.18 0.35 0.15 0.12 0.09 0.06 0.08 0.28 0.11 0.20 0.37 0.40 0.43 1.03 0.84 0.31 5.00 5.00 ES 0.08 0.11 0.07 0.12 0.12 0.12 0.12 0.13 0.09 0.13 0.20 0.35 0.45 1.02 0.59 0.24 3.94 3.94 32.01 EU 0.00 0.00 0.00 0.02 0.02 0.01 0.01 0.01 0.06 0.26 0.19 0.15 0.04 0.09 0.02 0.00 0.90 0.90 MU 0.01 0.00 0.00 0.04 0.04 0.02 0.01 0.01 0.06 0.31 0.14 0.14 0.09 0.14 0.12 0.01 1.15 1.15 8 SU 0.08 0.02 0.01 0.04 0.19 0.06 0.02 0.00 0.11 0.15 0.26 0.14 0.15 0.31 0.19 0.13 1.87 1.87

- N 0.95 0.86 0.64 0.63 0.90 0.31 0.13 0.28 0.78 0.89 0.54 0.38 0.92 2.32 2.17 1.12 13.81 13.81 1 SS 0.39 0.28 0.22 0.22 1.08 0.57 0.27 0.57 1.51 1.22 0.64 0.59 0.71 2.03 1.36 0.69 12.35 12.35 2 MS 0.07 0.18 0.04 0.00 0.02 0.04 0.04 0.06 0.02 0.12 0.21 0.19 0.21 0.73 0.40 0.15 2.48 2.48 ES 0.01 0.00 0.02 0.00 0.00 0.01 0.00 0.01 0.00 0.01 0.06 0.01 0.05 0.54 0.35 0.04 1.12 1.12 33.68 EU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.07 0.09 0.00 0.00 0.00 0.00 0.00 0.22 0.22 1 MU 0.00 0.00 0.00 0.00 0.02 0.01 0.00 0.00 0.06 0.07 0.07 0.04 0.06 0.01 0.04 0.01 0.39 0.39 3 SU 0.01 0.00 0.00 0.00 0.04 0.04 0.02 0.00 0.07 0.07 0.08 0.15 0.15 0.25 0.25 0.04 1.17 1.17

- N 0.67 0.54 0.07 0.01 0.41 0.30 0.22 0.20 0.28 0.34 0.18 0.14 0.89 2.56 2.68 1.26 10.78 10.78 1 SS 0.15 0.11 0.00 0.04 0.44 0.18 0.19 0.20 0.53 0.56 0.20 0.08 0.17 0.72 0.45 0.19 4.20 4.20 8 MS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.05 0.04 0.01 0.00 0.04 0.04 0.00 0.00 0.18 0.18 ES 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.00 0.00 0.05 0.05 16.98 Page 85

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 10 Wind Speed by Direction Measured at 175 Feet for Various Stability Classes for the Limerick Generating Station, January - December, 2014 Limerick Tower 1 January-December, 2014 175 ft. Wind Speed and Direction 171Ft-26Ft Delta-T (F)

SPEED ---- - - - - - - - - - - - --- WIND DIRECTIO )N CLASSES------------------------------------- STABILITY CLASSES------------

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU MU SU N SS MS ES TOTAL EU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.02 0.01 0.00 0.00 0.05 0.05 1 MU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.06 0.04 0.00 0.15 0.15 9 SU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.07 0.00 0.00 0.08 0.15 0.09 0.00 0.41 0.41

- N 0.05 0.00 0.00 0.00 0.02 0.05 0.02 0.06 0.02 0.13 0.08 0.04 0.15 1.28 0.89 0.48 3.27 3.27 2 SS 0.01 0.00 0.00 0.00 0.08 0.01 0.02 0.07 0.11 0.04 0.01 0.01 0.00 0.05 0.04 0.01 0.46 0.46 4 MS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.01 0.01 ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.36 EU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 G MU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.02 0.00 0.00 0.04 0.04 T SU 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0 .04 0.00 0.00 0.01 0.01 0.02 0.00 0.08 0.08 N 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.01 0.18 0.43 0.04 0.66 0.66 2 SS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.01 0.00 0.02 0.02 4 MS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.80 TOT 4.36 4.37 3.84 4.61 5.71 3.17 2.14 3.32 5.71 7.22 5.76 5.20 7.17 17.45 13.61 6.20 99.92 1.44 2.46 5.35 42.89 30.47 9.68 7.63 99.92 Wind Direction by Stability N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL -STABILITY CLASSES-0.01 0.00 0.00 0.04 0.02 0.01 0.01 0.01 0.12 0.39 0.38 0.20 0.09 0.12 0. 02 0.01 1.44 Extremely Unstable 0.04 0.04 0.08 0.07 0.09 0.05 0.01 0.02 0.15 0.48 0.31 0.28 0.27 0.26 0.26 0.04 2.46 Moderately Unstable 0.18 0.08 0.14 0.12 0.32 0.13 0.07 0.07 0.20 0.47 0.52 0.54 0.59 0. 93 0.76 0.21 5.35 Slightly Unstable 2.53 2.35 1.90 2.45 2.27 1.17 0.73 0.99 1.80 2.29 1.62 1.43 2 .92 7.74 7.14 3.53 42.89 Neutral.

1.08 1.06 1.15 1.43 2.53 1.34 0.86 1.36 2.90 2.86 1.74 1.48 1.83 4.53 2.91 1.43 30.47 Slightly Stable 0.32 0.63 0.28 0.28 0.25 0.21 0.21 0.52 0.32 0.45 0.74 0.77 0.77 1.99 1.38 0.54 9.68 Moderately Stable 0.21 0.21 0.28 0.22 0.22 0.26 0.24 0.34 0.22 0.27 0.45 0.50 0.70 1.89 1.15 0.44 7.63 Extremely Stable Wind Direction by wind Speed N NNE NE ENE E ESE SE SSE 5 SSW SW WSW W WNW NW NNW TOTAL -WIND SPEED CLASSES-0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.08 CA L M 0.70 0.77 1.03 0.85 0.79 0.59 0.46 0.65 0.59 0.70 0.76 0.74 0.83 1.02 0.87 0.65 11.99 < 3.5 mph 1.24 1.61 1.81 2.77 1.65 0.98 0.71 1.17 1.38 2.12 2.22 2.38 2.52 4.89 3.19 1.38 32.01 3.6 - 7.5 mph 1.51 1.35 0.93 0.95 2.25 1.02 0.48 0.95 2.54 2.95 2 .04 1.61 2.17 6.17 4 .62 2.14 33.68 7.6 - 12.5 mph 0.85 0.65 0.07 0.05 0.91 0.52 0.44 0.41 1.05 1.15 0.64 0.41 1.31 3.60 3.42 1.50 16.98 12.6 - 18.5 mph 0.06 0.00 0.00 0.00 0.11 0.06 0.05 0.13 0.14 0.25 0.09 0.05 0.32 1.56 1.05 0.50 4.36 18.6 - 24.5 mph 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.00 0.01 0.02 0.21 0.46 0.04 0.80 >24.5 mph Page 86

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 11 Annual x/Q and DIQ values for the North Stack, Limerick Generating Station, 2014 Limerick Generating Station x/Q and D/Q values North Stack - Flow = 316000 cfm Stack ID Location Direction Range X/Q (s/mA3) Undepleted D/Q (1/m^2L N Site Boundary S 762 1.23E-07 1.33E-09 N Site Boundary SSW 762 1.07E-07 9.36E-10 N Site Boundary SW 884 5.65E-08 4.86E-10 N Site Boundary WSW 854 7.72E-08 6.04E-10 N Site Boundary W 854 1.78E-07 1.70E-09 N Site Boundary WNW 793 1.09E-07 1.29E-09 N Site Boundary NW 762 6.82E-08 7.73E-10 N Site Boundary NNW 884 8.05E-08 7.76E-10 N Site Boundary N 884 1.28E-07 1.19E-09 N Site Boundary NNE 793 1.99E-07 2.28E-09 N Site Boundary NE 793 1.41 E-07 1.68E-09 N Site Boundary ENE 793 1.19E-07 1.37E-09 N Site Boundary E 762 2.31 E-07 2.78E-09 N Site Boundary ESE 762 5.09E-07 6.39E-09 N Site Boundary SE 762 7.42E-07 1.05E-08 N Site Boundary SSE 1006 1.86E-07 2.43E-09 N RR-Inf-Lck-NG S 300 5.37E-07 5.16E-09 N RR-Inf-Lck-NG SSW 225 7.88E-07 5.39E-09 N RR-Inf-Lck-NG SW 225 5.OOE-07 2.99E-09 N RR-Inf-Lck-NG WSW 345 3.05E-07 1.98E-09 N RR-Inf-Lck-NG W 225 1.56E-06 1.16E-08 N RR-Inf-Lck-NG WNW 345 3.88E-07 4.28E-09 N RR-Inf-Lck-NG NW 450 1.48E-07 1.61 E-09 N RR-Inf-Lck-NG ESE 884 4.20E-07 5.15E-09 N RR-Inf-Lck-NG WSW 450 1.91 E-07 1.36E-09 N RR-Inf-Lck-NG NNE 682 2.32E-07 2.74E-09 N Inhalation N 948 1.20E-07 1.09E-09 N Inhalation NNE 825 1.92E-07 2.17E-09 N Inhalation NE 1057 1.12E-07 1.22E-09 N Inhalation ENE 985 1.04E-07 1.09E-09 N Inhalation E 873 2.05E-07 2.39E-09 N Inhalation ESE 1047 3.45E-07 4.36E-09 N Inhalation SE 1557 3.39E-07 4.34E-09 N Inhalation SSE 1647 1.15E-07 1.35E-09 N Inhalation S 1325 6.59E-08 7.26E-10 N Inhalation SSW 1543 5.28E-08 5.22E-10 N Inhalation SW 991 4.90E-08 4.42E-10 N Inhalation WSW 1158 5.34E-08 4.82E-10 Page 87

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 11 Annual x/Q and D/Q values for the North Stack, Limerick Generating Station, 2014 Limerick Generating Station x/Q and D/Q values North Stack - Flow = 316000 cfm Stack ID I Location I Direction I Range I X/Q (s/m^3) Undepleted D/Q (1/m^2)

N Inhalation W 1106 1.29E-07 1.23E-09 N Inhalation WNW 1198 6.61E-08 7.54E-10 N Inhalation NW 1103 4.47E-08 4.84E-10 N Inhalation NNW 1539 6.05E-08 4.02E-10 N Vegetation N 1016 1.13E-07 1.01 E-09 N Vegetation NNE 2929 1.35E-07 4.48E-10 N Vegetation NE 1065 1.12E-07 1.21E-09 N Vegetation ENE 4331 1.47E-07 2.11E-10 N Vegetation E 1255 1.72E-07 1.62E-09 N Vegetation ESE 1371 2.86E-07 3.34E-09 N Vegetation SE 2002 2.86E-07 3.08E-09 N Vegetation SSE 2107 1.05E-07 9.89E-10 N Vegetation S 1860 5.54E-08 5.29E-10 N Vegetation SSW 1622 5.21E-08 4.98E-10 N Vegetation SW 1389 3.65E-08 3.85E-10 N Vegetation WSW 1374 4.65E-08 4.57E-10 N Vegetation W 1317 1.08E-07 1.03E-09 N Vegetation WNW 1198 6.61E-08 7.54E-10 N Vegetation NW 2499 3.12E-08 1.83E-10 N Vegetation NNW 1703 6.03E-08 3.54E-10 N Meat N 7551 6.25E-08 9.83E-11 N Meat NNE 3967 1.73E-07 3.28E-10 N Meat NE 4890 1.86E-07 2.38E-10 N Meat ENE 6265 1.11E-07 1.30E-10 N Meat ESE 3775 2.1OE-07 7.81E-10 N Meat SE 3331 1.91 E-07 1.40E-09 N Meat S 3722 6.77E-08 2.57E-10 N Meat SSW 3167 8.12E-08 3.02E-10 N Meat WSW 4321 9.18E-08 1.67E-10 N Meat W 4537 8.92E-08 2.57E-10 N Cow N 7551 6.25E-08 9.83E-11 N Cow S 6741 1.27E-07 1.24E-10 N Cow SSW 3167 8.12E-08 3.02E-10 N Cow WSW 4321 9.18E-08 1.67E-10 N Garden/Fruit ESE 2198 2.45E-07 1.76E-09 N Garden/Fruit SE 1972 2.88E-07 3.15E-09 N Garden/Fruit N 5174 1.32E-07 3.90E-10 N Garden/Fruit SSE 7202 1.04E-07 1.85E-1 0 Page 88

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 12 Annual x/Q and D/Q values for the South Stack, Limerick Generating Station, 2014 Limerick Generating Station x/Q and D/Q values South Stack - Flow = 187000 cfm Stack ID Location I Direction Range (m) X/Q (s/m^3) Undepleted D/Q (1/mA2)

Site Boundary S 762 7.02E-08 8.51 E-10 Site Boundary SSW 762 5.61 E-08 6.03E-10 Site Boundary SW 884 2.51 E-08 3.09E-10 Site Boundary WSW 854 3.09E-08 3.53E-10 Site Boundary W 854 9.67E-08 1.07E-09 Site Boundary WNW 793 5.73E-08 9.13E-1 0 Site Boundary NW 762 3.46E-08 5.13E-10 Site Boundary NNW 884 4.75E-08 4.93E-1 0 Site Boundary N 884 7.70E-08 8.27E-1 0 Site Boundary NNE 793 1.22E-07 1.72E-09 Site Boundary NE 793 8.46E-08 1.32E-09 Site Boundary ENE 793 7.37E-08 1.31 E-09 Site Boundary E 762 1.32E-07 2.24E-09 Site Boundary ESE 762 2.64E-07 4.26E-09 Site Boundary SE 762 3.99E-07 6.57E-09 Site Boundary SSE 1006 1.09E-07 1.66E-09 RR-Inf-Lck-NG S 300 3.OOE-07 2.98E-09 RR-Inf-Lck-NG SSW 225 4.03E-07 3.21 E-09 RR-Inf-Lck-NG SW 225 2.07E-07 1.51 E-09 RR-Inf-Lck-NG WSW 345 1.13E-07 9.18E-10 RR-Inf-Lck-NG W 225 8.15E-07 6.52E-09 RR-Inf-Lck-NG WNW 345 1.95E-07 2.31 E-09 RR-Inf-Lck-NG NW 450 7.11 E-08 8.71 E- 10 RR-Inf-Lck-NG ESE 884 2.27E-07 3.63E-09 RR-Inf-Lck-NG WSW 450 7.16E-08 6.57E-1 0 RR-Inf-Lck-NG NNE 682 1.31 E-07 2.01 E-09 Inhalation N 948 7.46E-08 7.67E-10 Inhalation NNE 825 1.20E-07 2.06E-09 Inhalation NE 1057 8.20E-08 1.01E-09 Inhalation ENE 985 7.74E-08 1.08E-09 Inhalation E 873 1.30E-07 2.02E-09 Inhalation ESE 1047 2.04E-07 3.06E-09 Inhalation SE 1557 2.56E-07 3.53E-09 Inhalation SSE 1647 8.71 E-08 1 .1OE-09 Inhalation S 1325 4.59E-08 5.64E-1 0 Inhalation SSW 1543 3.97E-08 4.34E-1 0 Inhalation SW 991 2.29E-08 2.98E-10 Inhalation WSW 1158 2.52E-08 3.36E-10 Page 89

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Table D - 12 Annual x/Q and D/Q values for the South Stack, Limerick Generating Station, 2014 Limerick Generating Station x/Q and D/Q values South Stack - Flow = 187000 cfm Stack ID Location Direction I Range (m) I X/Q (s/m^3) Undepleted I D/Q (1/m'2)

S Inhalation WSW 1158 2.52E-08 3.36E-10 S Inhalation W 1106 7.57E-08 8.35E-10 S Inhalation WNW 1198 4.03E-08 5.36E-10 S Inhalation NW 1103 2.64E-08 3.65E-10 S Inhalation NNW 1539 5.27E-08 3.05E-10 S Vegetation N 1016 7.28E-08 7.17E-10 S Vegetation NNE 2929 1.40E-07 4.66E-1 0 S Vegetation NE 1065 8.22E-08 9.99E-10 S Vegetation ENE 4331 1.58E-07 2.17E-10 S Vegetation E 1255 1.44E-07 1.52E-09 S Vegetation ESE 1371 2.14E-07 2.62E-09 S Vegetation SE 2002 2.43E-07 2.64E-09 S Vegetation SSE 2107 9.27E-08 8.52E-10 S Vegetation S 1860 4.74E-08 4.51E-10 S Vegetation SSW 1622 4.06E-08 4.19E-10 S Vegetation SW 1389 2.32E-08 3.09E-10 S Vegetation WSW 1374 2.66E-08 3.51E-10 S Vegetation W 1317 6.89E-08 7.42E-10 S Vegetation WNW 1198 4.03E-08 5.36E-10 S Vegetation NW 2499 2.97E-08 1.54E-10 S Vegetation NNW 1703 5.52E-08 2.74E-10 S Meat N 7551 6.42E-08 9.40E-1 1 S Meat NNE 3967 1.82E-07 3.19E-10 S Meat NE 4890 1.96E-07 2.36E-10 S Meat ENE 6265 1.18E-07 1.32E-10 S Meat ESE 3775 2.16E-07 7.03E-10 S Meat SE 3331 1.81 E-07 1.26E-09 S Meat S 3722 7.20E-08 2.58E-10 S Meat SSW 3167 8.62E-08 2.85E-10 S Meat W 4537 9.20E-08 2.32 E- 10 S Cow N 7551 6.42E-08 9.40E-1 1 S Cow S 6741 1.39E-07 1.25E-10 S Cow SSW 3167 8.62E-08 2.85E-10 S Cow WSW 4321 9.87E-08 1.79E-10 S Garden/Fruit ESE 2198 2.31 E-07 1.51 E-09 S Garden/Fruit SE 1972 2.44E-07 2.69E-09 S Garden/Fruit N 5174 1.35E-07 4.03E-10 S Garden/Fruit SSE 7202 1.11E-07 1.78E-10 Page 90

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Appendix D ERRATA - Previous Reports Page 91

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SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Correction to 2013 ARERR Dosimetry data was documented as a gross value in the 2013 ARERR. Re-evaluation of the data was performed, subtracting out extraneous dose. Extraneous dose is the dose accumulated on a dosimeter prior to and after field deployment from radiation other than that at the field monitoring location. The extraneous dose can include natural terrestrial background radiation, cosmic sources, elevated dose from transport at high altitudes, any man-made sources potentially encountered in transit or at the facility, such as shipments of medical or other radioisotopes or facility sources. The extraneous dose is subtracted from the field dosimeter reading in order to determine the field dose.

The subtraction of extraneous dose (also referred to as transit dose) is recommended by ANSI N545-1975, which is supported by the Regulatory Guide 4.13 Revision 1 (July 1977). This change impacts two sections of the 2013 report, as listed below.

Section 2, Discussion J, Independent Spent Fuel Storage Installation was revised to reflect the correct net direct radiation value.

Section 3, Discussion A, Radiological Impact to Man and Compliance to 40 CFR 190 Limits, specifically the 10CFR190 compliance table, was revised to reflect the correct net direct radiation values.

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SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT NO. 39 January 1, 2010 through December 31, 2013 EXELON GENERATION COMPANY, LLC LIMERICK GENERATING STATION UNITS NO. 1 AND 2 DOCKET NO. 50-352 (Unit 1)

DOCKET NO. 50-353 (Unit 2)

Submitted to The United States Nuclear Regulatory Commission Pursuant to Facility Operating License:

NPF-39 (Unit 1)

NPF-85 (Unit 2)

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SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC F. Abnormal Releases Total Qtr 4

1. Liquid I tr I Qtr 2 7---- --

Qtr7----

.3-- Qtr 4 Total 3

Number of Releases 1.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 1.00E+00 Total Activity Released (Ci) 7.35E-05 0.OOE+00 0.OOE+00 0.OOE+00 7.35E-05

2. Gaseous Qtr I Qtr 2 Qtr 3 Qtr 4 Total Number of Releases 0.OOE+00 0.00E+00 0.00E+00 0.00E+00 0.OOE+00 Total Activity Released (Ci) 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.00E+00

Tritium was identified in the Unit 1 Underground Normal Waste Holding Tank (UGNWHT) from a sample taken on March 13, 2013 at a concentration of 4.620E+03 pCi/L. The Ul UGNWHT is an isolated tank that is released in batches to the Holding Pond, and ultimately released through the permitted discharge point. The concentration released, as summarized in Appendix A Table 2A, represents 2.30E-4% of the ODCM limit of 1.OOE-2 uCi/ml. The entire issue was documented in IR 1503500.

G.Spills There were no spills to ground containing radioactive material in 2013. However, during the first quarter and fourth quarter of 2013, tritiated water was identified leaking from the expansion joints of the Unit 1 Turbine Building condenser bay. The water was contained and disposed of via the normal radioactive waste processing system. No elevated tritium results due to this leak were observed in the monitoring wells or the Power Block Foundation Sump in 2013.

H.Revisions to the ODCM No changes to the ODCM have been made since the 2012 AREOR.

1. Radioactive Effluent Monitoring Instrumentation Out of Service for More Than 30 Days There was no radioactive effluent monitoring instrumentation out of service for more than 30 days in 2013.

J. Independent Spent Fuel Storage Installation (ISFSI)

An Independent Spent Fuel Storage Installation (ISFSI) was placed in service starting July 21, 2008. In 2013 the dose to the nearest resident from the ISFSI was 0.0 mrem, using environmental dosimeters from the Radiological Environmental Monitoring Program.

3. Radiological Impact to Man and Compliance to 40 CFR 190 Limits A. Dose to Members of the Public at or Beyond Site Boundary Per ODCM Control 6.2, the Annual Radioactive Effluent Release Report shall include an assessment of the radiation doses to the hypothetically highest exposed MEMBER OF THE PUBLIC from reactor releases and other nearby uranium fuel cycle sources. The ODCM does not require population doses to be calculated. For purposes of this calculation the following assumptions were made:

" Long term annual average meteorology X/Q and D/Q and actual gaseous effluent releases were used.

Gamma air dose, Beta air dose, Total Body and Skin doses were attributed to noble gas releases.

Critical organ and age group dose attributed to iodine, particulate, carbon-14 and tritium releases.

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SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC

100 percent occupancy factor was assumed.

Dosimetry measurements (minus background levels) obtained from the Radiological Environmental Monitoring Program for the nearest residence to the Independent Spent Fuel Storage Installation (ISFSI) was used to determine direct radiation exposure.

The highest doses from the critical organ and critical age group for each release pathway was summed and added to the net dosimetry measurement from nearest residence to the ISFSI for 40CFR190 compliance.

Gaseous Releases:

The critical age-organ group was the child-bone. Calculated dose was 1.55E+00 mrem, which represents 5.17 E+00 percent of the allowable limits. Carbon-14 represented 99.9 % or 1.55E+00 mrem of the total dose (Table 1).

Liquid Releases:

The critical age-organ was the child-GI-Lli. Calculated total body dose and organ dose were 1.79E-04 and 1.79E-03 mrem, respectively.

40 CFR 190 Compliance:

The maximum calculated dose to a real individual would not exceed 1.07E+01 mrem (total body),

1.16E+01 mrem (organ), or 1.07 E+01 mrem (thyroid).

All doses calculated were well below all ODCM and 40 CFR Part 190 limits to a real individual.

Table 1 Summary of Gaseous and Liquid Effluent Doses to Members of the Public at the Highest Dose Receptors and 40CFR190 Compliance Maximum Individual Applicable Estimated Age % of Limit Unit Noble Gas Dose Dose Group Applicable Limit Nearest Residence Gamma Air Dose 6.22E-03 All 3.11 E-02 20 mRad Nearest Residence Beta Air Dose 3.83E-03 All 9.58E-03 40 mRad Nearest Residence Total Body 5.85E-03 All 5.85E-02 10 mrem Nearest Residence Skin 9.64E-03 All 3.21 E-02 30 mrem Iodine, Particulate, C-14 &

Tritium Vegetation Pathway Bone 1.55E+00 Child 5.17E+00 30 mrem Liquid Aqua, PA Total Body 1.79E-04 Child 2.98E-03 6 mrem Aqua, PA GI-Lli 1.79E-04 Child 8.95E-04 20 mrem 40 CFR 190 Compliance Gaseous Effluents Noble Particulate, Liquid Net Direct TotalTtl Applicable A of Limit Unit Gas Iodine, C-14 Effluents Radiation Limit

& Tritium Total Body Dose 6.76E-03 3.12E-01 1.79E-04 0.OOE+00 3.19E-01 1.28E+00 25 mrem Organ Dose 6.76E-03 1.55E+00 1.79E-04 0.OOE+00 1.56E+00 6.23E+00 25 mrem Thyroid Dose 6.76E-03 3.12E-01 1.78E-04 0.OOE+00 3.19E-01 4.25E-01 75 mrem Page 96

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Appendix E Offsite Dose Calculation Manual Revision 27 Summary of Changes Page 97

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SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Change Matrix for ODCM Revision 27 Change Type - A Administrative Changes Change Type- T Technical Changes Determination No. 1 Item Rev 26 Rev 27 Change and Reason Change No. Page Page Type

1. 6-10 6-10 Updated Table Of Contents numbering. A

2. 12 12 Deleted the definition for continuous sampling. T Reason:

This is an outdated definition that used a standard specific to air. The definition also allowed for an extraneous amount of time (eight hours) for interrupted sample flow. A continuous sampling definition is not required for compliance of the ODCM. This revision will remove all reference to it.

3. 13-15 13-15 Step numbers updated due to the removal of the Continuous A Sampling definition referenced in Item 1.

4. 22 22 Deleted the statement from Table 3.1-1 Action 101 that stated: T Clearing a HI/LO flow alarm within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> of the alarm annunciation meets the requirements of Definition 1.5 Continuous Sampling.

Reason:

Removal of this action statement will align with the removal of the continuous sampling definition and the procedural requirements of the Main Control Room (MCR) Alarm Response Card (ARC). By removing this statement the operability status of the radiation monitor will be declared immediately and associated ODCM LCO will be entered.

5. 26 26 Deleted the Table Notation: T

++ Particulate filter and Iodine cartridge replacement does not affect the operability of the system. See definition for Continuous Sampling.

Reason:

The Continuous Sampling definition is being removed as identified in Item 1. The impact of removing this table notation is that an LCO condition will be entered when there is a loss of continuous monitoring due to weekly filter removal and installation. If a redundant skid is in service at the time of sampling, continuous monitoring is maintained per the requirements of the ODCM Table 3.1-2 for minimum channels operable, and a PLCO may be entered.

The use of the Short Duration Time Clock (SDTC) log will be used to track the frequently performed Surveillance Test for filter replacements.

6. 26 26 Deleted from Table 3.1-2 the ++ notation from items Ib, Ic, 2b, 2c, A 3a and 3b.

7. 27 27 Added the additional condition to Table 3.1-2 Action 112: T IF replacing particulate and iodine filter media for weekly analysis as required by Table 4.2-2, Page 99

SITE: LIMERICK GENERATING STATION - UNITS 1 & 2 LICENSEE: EXELON GENERATION COMPANY, LLC Change Matrix for ODCM Revision 27 Change Type - A Administrative Changes Change Type - T Technical Changes Determination No. 1 Item Rev 26 Rev 27 Change and Reason Change No. Page Page I Type THEN auxiliary sampling equipment is not required if the interruption of sample collection will not exceed one (1) hour.

Reason:

Additional clarification was needed to allow for the weekly sampling of the stack vents iodine and particulate filters without setting up auxiliary equipment. The installation of auxiliary sampling equipment would cease sample collection and is estimated to exceed the average time to replace particulate and iodine filter media. It is acknowledged that to meet the weekly analysis requirement in ODCM Table 4.2-2, interruption of a short duration of continuous sample collection will occur to retrieve and replace the installed filter media.

8. 27 28 Added the additional condition to Table 3.1-2 Action 115: T ff replacing particulate and iodine filter media for weekly analysis as required by Table 4.2-2, THEN Hot Maintenance Shop Ventilation may remain in service if the interruption of sample collection will not exceed one (1) hour.

Reason:

Additional clarification was needed to allow for the weekly sampling of the Hot Maintenance Shop (HMS) radiation monitor iodine and particulate filters without securing HMS ventilation. It is acknowledged that to meet the weekly analysis requirement in ODCM Table 4.2-2, interruption of a short duration of continuous sample collection will occur to retrieve and replace the installed filter media.

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ML15133A123

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