RS-14-029, Annual Report on the Meteorological Monitoring Program at the Braidwood Nuclear Power Station 2009

Annual Report on the Meteorological Monitoring Program at the Braidwood Nuclear Power Station 2009

ML14030A291
Person / Time
Site:	Braidwood
Issue date:	12/31/2009
From:	Murray & Trettel
To:	Exelon Nuclear, Office of Nuclear Reactor Regulation
Shared Package
ML14030A308	List: ML14030A264 ML14030A266 ML14030A267 ML14030A268 ML14030A269 ML14030A273 ML14030A274 ML14030A275 ML14030A276 ML14030A278 ML14030A279 ML14030A280 ML14030A284 ML14030A285 ML14030A286 ML14030A287 ML14030A288 ML14030A289 ML14030A290 ML14030A291 ML14030A292 ML14030A293 ML14030A294 ML14030A295 RS-14-029, Annual Report on the Meteorological Monitoring Program at the Braidwood Nuclear Power Station 2008 RS-14-029, Annual Report on the Meteorological Monitoring Program at the Braidwood Nuclear Power Station 2009 RS-14-029, Annual Report on the Meteorological Monitoring Program at the Braidwood Nuclear Power Station 2011 RS-14-029, Annual Report on the Meteorological Monitoring Program at the Braidwood Nuclear Power Station 2012 RS-14-029, Braidwood Station Kankakee River Fish Monitoring Program, 1991-2013 - Tables Requested by the NRC to Describe the Number of Fish Caught by Sampling Gear and Species at Each Monitoring Location RS-14-029, Braidwood Station Kankakee River Fish Monitoring Program, 2010 RS-14-029, Braidwood Station, 2011 Benthos Monitoring and Historical Fish and Benthos Comparisons RS-14-029, Braidwood Station, Kankakee River Fish Monitoring Program, 2012 RS-14-029, Employment and Land Requirements for Alternatives to Byron Units 1 and 2 and Braidwood Units 1 and 2 - Lr Chapter 7 Energy Alternatives RS-14-029, Final Report: Characterization of Unionid Communities Near the Braidwood Nuclear Station Kankakee River Discharge Location RS-14-029, Final Report: Unionid Relocation Near the Braidwood Nuclear Station Kankakee River Discharge Location RS-14-029, Investigations to Determine Presence of State-Listed Species of Fish and Freshwater Mussels in the Kankakee River Near the Braidwood Nuclear Station Warmwater Discharge Channel RS-14-029, Monthly Report on the Meteorological Monitoring Program at the Braidwood Nuclear Generating Station RS-14-029, Plan Completion Report for the VB 1 Area RS-14-029, Plan Completion Report for the VB 2/3 and Pond Area RS-14-029, Plan Completion Report for the VB 4 Area RS-14-029, Plan Completion Report for the VB 6 Area RS-14-029, Plan Completion Report for the VB 7 Area RS-14-029, Standard Operating Procedures for Braidwood Station'S Fisheries Monitoring Program in the Kankakee River and Horse Creek RS-14-029, Status of Fish Communities and Sport Fishery in the Kankakee River and Tributary Streams: 2005 Basin Survey RS-14-029, Transmittal of Annual Report on the Meteorological Monitoring Program at the Braidwood Nuclear Power Station 2010 RS-14-029, Transmittal of Application for an Incidental Take Permit for Threatened or Endangered Species and Conservation Plan
References
RS-14-029
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Annual Report on the Meteorological Monitoring Program at the Braidwood Nuclear Power Station 2009 prepared for Exelon Nuclear Warrenville, IL 60555 by Murray and Trettel, Incorporated 600 First Bank Drive, Suite A Palatine, IL 60067 (847) 963-9000 e-mail: mt@weathercommand.com For Exelon Use Only Reviewed By : 7%Date :. /, Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847)963-9000 I Murray&Trettel, Ifnc.26 March 2010 Mr. Tim Meents Braidwood Station Exelon Nuclear 35100 S. Rt. 53, Suite 84 Braceville, IL 60407

Dear Tim:

Enclosed is one updated draft copy of the Murray and Trettel 2009 meteorological monitoring report for Braidwood.

Please review the report and return the attached approval sheet to me.If you have any questions, please contact me.Sincerely, Andrew J. o Environmental Meteorologist Phone: (847) 934-8123 Fax: (847) 963-0003 e-mail: andrewilotz@weathercommand.com Enclosures 600 First Bank Drive, Suite A -Palatine, IL 60067 i (847) 963-9000 -Fax: (847) 963-0003 i Table of Contents Section Description Page List of Tables .......................................................................................

ii I Introduction

........................................................................................

1 2 Sum m ary .......................................

2 3 Data Acquisition

.................................................................................

3 4 Data Analysis ....................................................................................

5 5 Results .............................................................................................

10 Site Calibration logs ...................................................................

Appendix Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847)963-9000 List of Tables Number Description Paae 1 Instrument Locations

..........................................................................

4 2 D ata Loggers .....................................................................................

4 3 Wind Direction Classes ..............................

7 4 Wind Speed Classes .........................................................................

7 5 Atmospheric Stability Classes ..........................................................

8 6 Data Recovery Summary ...............................................................

11 7 Wind Rose, January-March 2009 ..................................................

14 8 Wind Rose, April-June 2009 ..........................................................

16 9 Wind Rose, July-September 2009 ..................................................

18 10 Wind Rose, October-December 2009 ............................................

20 11 Wind Rose, January-December 2009 ..........................................

22 12 Precipitation Totals .........................................................................

24 13 Maximum Doses Resulting From Airborne Releases .....................

25 Murray & Trettel, Inc. 6oo First Bank Driue, Suite A Palatine, Illinois 60067 (847)963-9ooo Introduction The purpose of the meteorological program being conducted at the Braidwood Station site is to provide information sufficient to assess the local weather conditions and to determine the degree of atmospheric dispersion of airborne radioactive effluent from the station.The meteorological tower is 320 ft. high and is instrumented at two levels. Wind speed and direction are measured at 34 ft. and 203 ft. Ambient temperature is measured at 30 ft. Differential temperature, referenced to 30 ft., is measured at 199 ft. Dew point temperature is measured at 30 ft. Precipitation is measured at approximately 3 ft.Joint frequency stability wind rose tables of wind direction, wind speed, and stability are routinely tabulated from hourly measurements.

The quarterly and annual tables are included in this report.Descriptions of the instruments and data loggers are given in Section 3 (Data.Acquisition) of this report. Data reduction and processing are described in Section 4 (Data Analysis).

The results given in Section 5 of this report include modeled maximum whole body doses, skin doses, organ doses based upon airborne releases, and site meteorology.

Murray & Trettel, Inc. 600 Frst Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 2. Summary The Braidwood Station meteorological monitoring program produced 52,265 hours0.00307 days <br />0.0736 hours <br />4.381614e-4 weeks <br />1.008325e-4 months <br /> of valid data out of a possible 52,560 parameter hours during 2009 (365 days x 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />s/day x 6 measured priority parameters), which represents an overall data recovery rate of 99.4%. Priority parameters are all parameters except dew point temperature and precipitation.

The stability wind rose tables included in this report have been generated using the 34 ft.wind data with the 199-30 ft. differential temperature data.The maximum annual calculated cumulative doses resulting from airborne releases were as follows.Unit 1: gamma air dose beta air dose whole body dose skin dose organ (teenager-thyroid) 7.357 x 10-5 5.025 x 104 3.931 x 10"'2.403 x 104 1.067 x 10.2 8.277 x 10"'5.783 x 104 4.709 x 10.'2.715 x 104 4.415 x 10"3 mrad mrad mrem mrem mrem mrad mrad mrem mrem mrem Unit 2: gamma air dose beta air dose whole body dose skin dose organ (teenager-thyroid)

Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847)963-90oo 3. Data Acquisition Wind speed and direction are measured with MRI model 1022 wind sensors. The wind speed sensors have a starting speed of 0.5 mph (0.22 mps), a range of 0 to 100 mph (0 to 44.7 mps), and a system accuracy of +/-1.25 mph at 100 mph (+/-0.56 mps at 44.7 mps). The wind direction sensors have a threshold speed of 0.75 mph (0.33 mps), a range of 0 to 5400, and a system accuracy of +/-50.Ambient and differential temperature are measured with MRI model 1596602 sensors.Ambient temperature is measured within the range of -22 to 122°F (-30 to 500C) with an accuracy of +/-0.5 0 F (+/-0.30C).

Differential temperature is measured within the range of-10 to 10°F (-5.6 to 5.60C) with an accuracy of +/-0.18 0 F (+/-0.100C).

Dew point temperature is measured with an MRI model 1993900000 dew point sensor and the range of measurement is -22 to 122 0 F (-30 to 50 0 C) with an accuracy of +/-2.7 0 F (+/-11.5 0 C).Precipitation is measured with a Climatronics 100097-1 tipping bucket rain gauge and is measured in increments of one one-hundredth of an inch with a system accuracy of+/-0.01° (+/-0.25mm).

Instrument types and locations are summarized in Table 1.The meteorological data are collected and stored by a Microtel 4.0 data acquisition system. The Microtel measures the analog voltages of the instruments and records the digital equivalent within the range of 0.to +5 volts. The Microtel has the capability of storing 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of minute data and one week of hourly data. Data are obtained from the Microtel by a direct dial telephone hookup to an in-house computer system. Data are sampled every second.As a backup to the Microtel, data are also recorded with a Johnson Yokogawa Corp. digital recorder (JYC DA100 data acquisition unit and Contec IPC-PT/M300(PC)WOU PC). Data are sampled every 10 seconds.Data loggers are summarized in Table 2.Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Miinos 60067 (847) 963-9000 -Table I Instrument Locations Measurement Wind Speed Wind Direction Differential Temperature Wind Speed Wind Direction Ambient Temperature Dew Point Temperature Precipitation Sensor Type MRI 1022-S MRI 1022-D MRI 1596602 MRI 1022-S MRI 1022-D MRI 1596602 MRI 1993900000 Climatronics 100097-1 Location Tower Tower Tower Tower Tower Tower Tower Ground Elevation 203 ft.203 ft.199 ft.34 ft.34 ft.30 ft.30ft.3 ft.Table 2 Data Loo ers Sampling Measurement L Tgg Iype Frequency Winds, Temperatures, Microtel 4.0 data acquisition system 1 sec.and Precipitation Winds, Temperatures, Johnson Yokogawa Corp. Digital Recorder 10 sec.and Precipitation (JYC DA100 and Contec IPC-PT/M300(PC)WOU) digital recorder Murray & Trettel, Inc.6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 4. Data Analysis The Braidwood Microtel is routinely interrogated to obtain hourly average data. The data are then stored in the meteorological data base and listings of the data are generated.

The data listings are examined by qualified personnel and any apparent problems are brought to the attention of the Project Manager or Meteorological Technician and the Instrument Maintenance staff.Hourly values of wind speed, wind direction, ambient temperature, differential temperature, dew point temperature, and precipitation are obtained through measurements taken at the site. The standard deviation of wind direction (sigma) is derived. The wind direction variation Is described in terms of the standard deviation of the direction about the mean direction.

The Microtel computes an hourly value of wind sigma by taking the Root-Mean-Square (RMS) of the four quarter-hour wind sigma values. The quarter-hour wind sigma values are calculated directly from the one second wind direction samples during the 15 minute period.The data base files are edited approximately once a week. Missing Microtel values are replaced with digital recorder values, when available.

Invalid data are deleted from the data base.When an hourly value is missing or invalid, the numeral 999 is entered into the computer data file in the appropriate location.

When the wind direction changes substantially relative to its short term fluctuations, the numeral 888 can be entered into the wind sigma location to indicate shifting winds. When the wind blows with velocities near the sensing threshold of the instrument, the numeral 777 can be entered into the wind direction, wind speed, and wind sigma locations to indicate light and variable winds.Murray & Trettel, Inc. 6oo0 Frst Bank Drive, Suite A Palatine, Illinois 60067 (847)963-9000 A professional meteorologist reviews the data, calibration findings, equipment maintenance reports, and other information and determines which data are valid. Only the valid data are retained in the data base.As a quality control measure, a monthly comparison is made of Microtel and digital recorder data. An investigation is made into the reasons for any significant differences between the sets of values.Joint frequency stability wind rose tables of hourly data measured at the site are generated.

These tables indicate the prevailing wind direction, wind speed, and stability classes measured during the period of observation as well as the joint frequencies of occurrence of the wind direction, wind speed, and stability classes. The values are also used as input to the atmospheric transport and diffusion models. Wind direction, wind speed, and stability classes are given in Tables 3, 4, and 5.Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847)963-9000 Table 3 Wind Direction Classes IF IF IF IF IF IF IF IF IF IF IF IF IF IF IF IF 348.750 < WD <11.250 < WD <33.750 < WD <56.250 < WD <78.750 < WD <101.250 < WD <123.750 < WD <146.250 < WD <168.750 < WD <191.250 < WD <213.750 < WD <236.250 < WD <258.750 < WD <281.250 < WD <303.758 < WD <326.250 < WD <11.250 THEN Class is 33.750 THEN Class is 56.250 THEN Class is 78.750 THEN Class is 101.250 THEN Class is 123.750 THEN Class is 146.250 THEN Class is 168.750 THEN Class is 191.250 THEN Class is 213.75c THEN Class is 236.250 THEN Class is 258.750 THEN Class is 281.25c THEN Class is 303.75c THEN Class is 326.250 THEN Class is 348.750 THEN Class is N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Table 4 Wind Speed Classes IF 0.0 mph < WS < 0.7 mph THEN Class is IF 0.7 mph < WS < 3.5 mph THEN Class is IF 3.5 mph < WS < 7.5 mph THEN Class is IF 7.5 mph < WS < 12.5 mph THEN Class is IF 12.5 mph < WS < 18.5 mph THEN Class is IF 18.5 mph < WS < 24.5 mph THEN Class is IF 24.5 mph < WS THEN Class is 1 2 3 4 5 6 7 Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-900o Table 5 Atmospheric Stabiity Classes Differential Temperature Interval Class (in C/I1 00m) (')Differential Temperature Interval (in OF over the 199-30 ft. interval)

(2)Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable AT < -1.9-1.9 < AT < -1.7-1.7 < AT < -1.5-1.5 < AT < -0.5-0.5 < AT < 1.5 1.5 < AT < 4.0 4.0 < AT AT < -1.8-1.8 < AT < -1.6-1.6 < AT < -1.4-1.4 < AT < -0.5-0.5 < AT < 1.3 1.3 < AT < 3.7 3.7 < AT from ANSIIANS 2.5 ( from ANSIIANS 2.5'= ANSIIANS 2.5 Intervals scaled for Instrument heights on the Braidwood meteorological tower Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 A description of the procedures and computational techniques used to calculate the doses resulting from radioactive releases is found in the Murray and Trettel, Inc. "Offsite Dose Calculation Manual" (ODCM-Rev.

9), dated January 1996. The ODCM describes the atmospheric transport and diffusion models used to calculate the doses and concentrations resulting from airborne releases.Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 5. Results 5.1 Instrument Maintenance The maintenance program followed during 2009 was composed of routinely scheduled visits and non-routine equipment repairs. Routine site visits were made to inspect the sensing and recording systems for proper operation.

In addition, routine maintenance and calibration checks of all tower-mounted and ground level equipment were performed every four months. A description of the calibration and field procedures is found in the Murray and Trettel, Inc. "P1009 Procedures Manual" (July 2009).In March, a bad resistor in the precipitation gauge was replaced.In May, the annual tower inspection was performed.

In June, a lightning strike damaged the 203' wind sensors, as well as readings to the process computer.

Sensors and blown fuses were replaced.In October, the digital recorder was unreachable by modem. The unit was rebooted to restore operability.

In November, a power failure at the met tower caused some data loss.In December, the UPS was replaced due to a bad battery. Also in December, the 203 ft. wind speed sensor was replaced due to bad readings.No other significant problems were encountered with the equipment, and at the end of the year, no problems were evident at the site.Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847)963-9ooo 5.2 Data Recovery The record of data recovery for the year is summarized in Table 6.Table 6 Braidwood Site Data Recovery Summary 2009 Measurement Wind Speed Wind Speed Wind Direction Wind Direction Ambient Temperature Differential Temperature Dew Point Temperature Precipitation Elevation 34 ft.203 ft.34 ft.203 ft.30 ft.199-30 ft.30 ft.3 ft.Recovered Hours 8732 8604 8734 8730 8732 8731 8732 8685 Recovered Percent 99.7 98.2 99.7 99.7 99.7 99.7 99.7 99.1 Lost Hours 26 156 26 30 28 29 28 75 Percent Chancqed 1.5 1.7 2.4 0.5 0.3 0.3 32.9 0.9 AVERAGE*99.4 average of priority parameters (all except dew point temperature and precipitation)

Valid Hours Lower Level Joint Frequency

% 8731 Upper Level Joint Frequency

% 8601 Recovered Percent 99.7 98.2 Lost Hours 29 159 Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 5.3 Summary of Billings for Equipment Repairs, Replacement Pars. and Other Work not Included in Fixed-Cost Maintenance Agreement

-2009 Description

-Braidwood Cost January Meteorological equipment maintenance 37.50 Meteorological parts, materials, and contractor services 75.87 February Meteorological equipment maintenance 37.50 Meteorological parts, materials, and contractor services 562.73 March Meteorological equipment maintenance 359.15 Meteorological parts, materials, and contractor services 100.55 Meteorological equipment maintenance 37.50 Meteorological parts, materials, and contractor services 353.19 May Meteorological equipment maintenance 37.50 Meteorological parts, materials, and contractor services 231.69 June Meteorological equipment maintenance 1,891.40 Meteorological parts, materials, and contractor services 159.68 JulV Meteorological equipment maintenance 0.00 Meteorological parts, materials, and contractor services 325.07 August Meteorological equipment maintenance 75.00 September-none- 0.00 October Meteorological equipment maintenance 335.20 November Meteorological equipment maintenance 517.70 Meteorological parts, materials, and contractor services 315.39 December Meteorological equipment maintenance 1,265.55 Meteorological parts, materials, and contractor services 93.60 Special Request 40.00 Annual Total: $ 6,851.77 Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-90o0 5.4 Stability Wind Rose Data The quarterly and annual stability wind roses are given in Tables 7 through 11. Wind speed classes have been altered to reflect the wind sensor threshold.

For the year, winds measured at 34 ft. most frequently came from the West-Northwest (9.41%) and fell into the 3.6-7.5 mph wind speed class (42.28%).

Calms (wind speeds at or below the sensor threshold) were measured 0.10% of the time and speeds greater than 24.5 mph were measured 0.01% of the time.Stability based on the 199-30 ft. differential temperature most frequently fell into the neutral classification (39.06%).Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847)963-9ooo TABLE 7-14-Braidwood Generating Station 34 ft. Wind Speed and Direction January-March.

2009 199Ft-30Ft Delta-T (F)Number of Observations

-2148 Values are Percent Occurrence SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL---------

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

EU HU SU N SS MS ES TOTAL EU MU C SU A N L SS MMS ES EU MU 1 SU-N 3 SS MS ES EU MU 4 SU-N 7 SS HS ES EU MU 8 SU-N 1 SS 2 S ES EU 1 KU 3 SU-N 1 SS 8MS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.28 0.19 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.37 0.05 0.00 0.00 0.05 0.00 0.00 0.05 0.00 0.65 0.79 0.28 0.33 0.00 0.05 0.00. 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.37 0.00 0.14 0.05 0.05 0.00 0.84 0.23 0.00 0.00 0.09 0.05 0.14 1.91 0.05 0.00 0.00 0.00 0.00 0.00 0.51 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.56 0.37 0.33 0.05 0.09 0.09 1.44 0.47 0.00 0.00 0.00 0.00 0.00 0.33 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.05 0.19 0.42 0.51 0.28 0.23 0.28 0.05 0.79 1.02 0.05 0.00 0.00 0.00 0.05 0.33 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.19 0.33 0.05 0.23 0.05 0.23 0.74 1.82 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.05 0.05 0.05 0.05 0.23 0.14 0.61 0.98 0.33 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.05 0.05 0.05 0.14 0.05 0.84 1.16 0.00 0.00 0.28 0.19 0.14 1.35 1.58 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.09 0.00 0.00 0.05 0.14 0.28 0.23 0.05 0.00 0.09 0.14 0.14 1.26 1.44 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.09 0.14 0.47 0.05 0.33 0.00.0.14 0.00 0.05 0.47 0.74 0.09 0.00 0.14 0.05 0.23 0.79 0.70 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.05 0.00 0.23 0.47 0.47 0.19 0.05 0.00 0.05 0.05 0.93 1.16 0.05 0..00 0.14 0.19'0.14 0.56 0.28 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.28 0.14 0.09 0.00 0.14 0.33 0.65 1.40 1.30 0.09 0.05 0.14 0.09 0.47 0.56 0.05 0.00 0.05 0.09 0.09 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.65 0.65 0.14 0.05 0.14 0.23 1.21 1.40 0.79 0.05 0.09 0.28 0.05 1.16 0.51 0.05 0.00 0.23 0.05 0.09 0.84 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.51 1.16 0.42 0.00 0.51 0.19 0.37 1.30 2.19 0.14 0.00 1.21 0.28 0.09 3.40 0.65 0.00 0.00 0.23 0.09 0.05 0.74 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.42 1.30 0.33 0.00 0.37 0.14 0.05 0.88 1.72 0.14 0.00 0.74 0.19 0.14 1.72 0.23 0.00 0.00 0.05 0.00 0.05 0.37 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.23 0.19 0.00 0.05 0.05 0.14 1.30 1.16 0.05 0.00 0.42 0.19 0.09 1.68 0.28 0.00 0.00 0.19 0.00 0.05 0.79 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.09 0.00 0.00 0.09 0.05 1.68 6.10 3.40 1.16 1.72 1.72 1.63 2.23 13.27 14.90 3.45 0.28 3.63 3.63 2.09 1.44 18.34 8.66 0.23 0.00 1.40 1.40 0.93 1.16 7.82 2.37 0.00 0.00 0.09 0.05 1.68 6.10 3.40 1.16 12.48 0.00 1.63 2.23 13.27 14.90 3.45 0.28 37.48 0.05 0.14 0.14 1.07 0.14 0.00 0.00 0.05 0.00 0.05 0.09 0.00 0.00 0.00 0.33 0.33 0.09 0.98 0.00 0.00 0.00 0.23 0.00 0.00 0.51 0.00 0.00 0.00 0.05 0.00 0.00 0.84 0.42.0.00 0.00 0.00 0.14 0.00 0.37 0.05 0.00 0.00 0.09 0.14 0.19 0.47 0.84 0.00 0.00 0.00 0.05 0.00 0.56 0.23 0.00 0.00 2.09 1.44 18.34 8.66 0.23 0.00 34.40 0.00 .0.09 0.05 0.23 0.05 0.37 0.42 1.12 0.19 0.74 0.00 0.00 0.00 0.00 0.93 1.16 7.82 2.37 0.00 0.00 13.69 Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847)963-90oo TABLE 7 continued-15-Braidwood Generating Station 34 ft. Wind Speed and Direction January-March.

2009 199Ft-3OFt Delta-T (F)SPEED ----------------------------------

W IND DIRECTION CLASSES ----------------------------------

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL---------

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

EU MU SU N SS 1S ES TOTAL EU IMU 9 SU-N 2 SS 4 MS ES EU GMU T SU N 2 SS 4 M ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.19 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.00 0.05 0.19 0.19 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 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.09 0.29 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.19 0.19 0.14 0.19 0.93 0.33 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.19 0.93 0.33 0.00 0.00 1.77 0.00 0.00 0.00 0.00 0.00 0.00 0.00 TOT 3.21 4.14 4.56 3.86 4.38 5.54 5.21 6.80 6.80 5.07 5.17 6.24 9.45 13,59 8.85 6.94 99.91 6.94 4.89 5.07 42.13 32.36 7.08 1.44 99.91 Wind Direction by Stability N NNE NE ENE E ESE SE SSE S SSW SW WSW W WN NW NNW TOTAL 0.09 0.14 0.23 1.82 0.70 0.19 0.05 0.61 0.33 0.09 2.33 0.70 0.09 0.00 0.14 0.09 0.14 3.35 0.70 0.00 0.14 0.05 0.09 0.09 1.91 1.02 0.37 0.33 0.23 0.37 0.14 1.30 1.49 0.56 0.28 0.28 0.19 0.23 1.96 2.47 0.37 0.05 0.14 0.42 0.33 1.72 2.09 0.37 0.14 0.33 0.37 0.23 2.70 3.07 0.05 0.05 0.23 0.42 0.65 2.84 2.51 0.14 0.00 0.42 0.14 0.47 1.91 1.68 0.47 0.00 0.19 0.23 0.47 2.00 2.00 0.23 0.05 0.09 0.37 0.51 1.35 2.23 1.49 0.19 0.37 0.61 0.47 3.58 2.75 1.49 0.19 1.96 0.56 0.51 6.01 4.00 0.56 0.00 1.16 0.33 0.23 3.40 3.26 0.47 0.00 0.65 0.23 0.28 3.86 1.68 0.23 0.00 6.94 4.89 5.07 42.13 32.36 7.08 1.44-STABILITY CLASSES-Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable 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 0.51 0.98 1.54 0.19 0.00 0.00 0.00 0.47 1.21 1.72 0.74 0.00 0.00 0.00 0.61 1.16 2.23 0.56 0.00 0.00 0.00 1.40 2.14 0.33 0.00 0.00 0.00 0.00 1.54 2.42 0.42 0.00 0.00 0.00 0.00 0.56 3.12 1.30 0.56 0.00 0.00 0.00 0.23 2.42 1.72 0.84 0.00 0.00 0.00 0.19 2.23 3.54 0.70 0.14 0.00 0.00 0.14 0.74 3.07 2.56 0.28 0.00 0.00 0.05 1.07 1.49 1.91 0.56 0.00 0.00 0.09 1.44 2.23 1.30 0.09 0.00 0.00 0.56 3.91 1.35 0.37 0.05 0.00 0.00 1.54 3.86 2.14 1.35 0.56 0.00 0.00 2.09 4.70 5.63 1.12 0.05 0.00 0.00 2.05 3.31 3.03 0.47 0.00 0.00 0.00 0.47 2.75 2.65 1.02 0.05 0.00 0.09 12.48 37.48 34.40 13.69 1.77 0.00 CALM< 3.5 mph 3.6 -7.5 mph 7.6 -12.5 mph 12.6 -18.5 mph 18,6 -24.5 mph> 24.5 mph Murray & Trettel, Inc. 600 First Bank Driue, Suite A Palatine, Illinois 60067 (847) 963-90o0 TABLE 8-16-Braidwood Generating Station 34 ft. Wind Speed and Direction April-June.

2009 199Ft-3OFt Oelta-T (F)Number of Observations

-2154 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 UJ SU N SS MS ES TOTAL EU MU C 5U A N L SS H S ES EU MU 1 SU-N 3 SS MS ES EU KU 4 SU-N 7 SS MS ES EU MU 8 SU-N 1 SS 2MS ES EU 1KU 3 SU-N I SS aMS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.28 0.09 0.00 0.28 0.09 0.09 0.32 0.37 0.05 0.00 0.00 0.00 0.09 0.70 0.05 0.00 0.00 0.00 0.00 0.00 0.37 0.00 0.00 0.00 0.00 0.00" 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.09 0.14 0.28 0.19 0.05 0.56 0.19 0.23 2.23 1.25 0.00 0.00 0.74 0.28 0.14 1.49 0.19 0.00 0.00 0.00 0.05 0.05 0.60 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.00 0.37 0.70 0.42 0.14 0.79 0.14 0.23 2.46 0.84 0.05 0.00 0.70 0.28 0.20 1.76 0.05 0.00 0.00 0.00 0.00 0.00 0.19 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.14 0.32 1.25 0.70 0.32 0.56 0.14 0.00 1.39 1.35 0.05 0.00 0.05 0.05 0.14 1.35 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.37 1.11 0.60 0.37 0.37 0.23 0.28 1.11 0.79 0.05 0.00 0.14 0.00 0.05 0.28 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.19 0.37 0.28 0.23 0.19 0.09 0.05 1.16 1.25 0.09 0.19 0.09 0.00 0.05 0.23 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.09 0.09 0.32 0.28 0.09 0.28 0.32 0.09 0.60 0.79 0.14 0.00 0.14 0.05 0.05 0.46 0.51 0.00 0.00 0.19 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.05 0.23 0.14 0.05 0.14 0.23 0.28 0.56 1.62 0.09 0.00 0.37 0.09 0.05 0.37 0.42 0.00 0.00 0.00 0.05 0.00 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.14 0.09 0.00 0.05 0.00 0.00 0.42 1.35 0.00 0.00 0.32 0.05 0.05 0.70 1.86 0.00 0.00 0.00 0.05 0.00 0.23 0.56 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.05 0.14 0.05 0.05 0.00 0.05 0.05 0.23 0.51 0.00 0.00 0.00 0.05 0.05 0.60 1.11 0.00 0.00 0.70 0.05 0.23 0.46 0.51 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.09 0.14 0.23 0.19 0.05 0.19 0.09 0.32 0.84 0.14 0.00 0.19 0.09 0.05 0.60 0.46 0.00 0.00 0.09 0.19 0.05 0.56 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.05 0.09 0.23 0.51 0.19 0.28 0.00 0.09 0.28 1.81 0.88 0.23 0.37 0.14 0.14 0.14 0.14 0.00 0.00 0.28 0.05 0.05 0.14 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.05 0.28 0.74 0.88 0.51 0.79 0.32 0.14 0.65 1.39 0.42 0.09 0.56 0.14 0.23 0.84 0.46 0.00 0.00 0.19 0.09 0.05 0.28 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.05 0.32 0.60 0.65 0.23 0.74 0.09 0.19.1.58 0.93 0.05 0.00 0.88 0.19 0.19 0.79 0.05 0.00 0.00 0.60 0.05 0.05.0.19 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 0.14 0.28 0.28 0.23 0.74 0.23 0.32 1.11 0.70 0.00 0.00 0.42 0.23 0.05 1.02 0.19 0.00 0.00 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.14 0.09 0.05 0.37 0.14 0.14 0.32 0.70 0.05 0.00 0.05 0.14 0.00 1.02 0.19 0.00 0.00 0.05 0.05 0.05 0.19 0.00 0.00 0.00 0.09 0.09 0.09 0.05 0.05 0.05 0.00 0.00 0.19 0.19 0.65 0.65 2.69 6.96 5.48 2.69 6.17 6.17 2.46 2.27 14.76 16.48 2.04 0.51 5.01 5.01 1.76 1.58 12.35 5.76 0.00 0.00 2.32 2.32 0.60 0.51 3.34 1.39 0.00 0.00 0.09 0.05 0.05 0.05 0.00 0.00 0.32 0.65"0.65 2.69 6.96 5.48 2.69 19.31 2.46 2.27 14,76 16.48 2.04 0.51 44.71 1.76 1.58 12.35 5.76 0.00 0.00 26.46 0.60 0.51 3.34 1.39 0.00 0.00 8.17 Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847)963-90oo TABLE 8 continued-17-Braidwood Generating Station 34 ft. Wind Speed and Direction April-June.

2009 199Ft-30Ft Delta-T (F)SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

CLASS N NNE NE ENE E ESE SE SSE S SSW SwWSW W WNW NW NNWTOTAL---------

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

EU MU SU N SS MS ES TOTAL EU 1 MU 9 SU-N 255 4MS ES EU GMU T SU N 2 SS 4 MS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.05 0.32 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 a.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 0.00 0.09 0.51 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.51 0.05 0.00 0.00 0.70 0.00 0.00 0.00 0.00 0.00 0.00 0.00 99.68 TOT 2.88 8.82 9.52 7.89 5.80 4.55 4.69 4.92 6.04 5.39 4.78 6.31 9.24 8.50 6.27 3.76 99.68 13.83 5.57 5.15 33.70 30.69 7.52 3.20 Wind Direction by Stability N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.28 0.09 0.19 1.49 0.70 0.14 0.00 1.35 0.51 0.51 4.46 1.76 0.19 0.05 1.49 0.56 0.51 4.78 1.58 0.46 0.14 0.60 0.23 0.28 3.06 2.65 0.74 0.32 0.51 0.23 0.37 1.76 1.90 0.65 0.37 0.28 0.09 0.14 1.58 1.67 0.37 0.42 0.65 0.42 0.23 1.25 1.62 0.42 0.09 0.51 0.46 0.32 1.02 2.32 0.23 0.05 0.37 0.09 0.05 1.53 3.90 0.09 0.00 0.74 0.19 0.37 1.67 2.32 0.05 0.05 0.32 0.51 0.23 1.62 1.53 0.37 0.19 0.97 0.19 0.37 0.65 2.32 1.39 0.42 1.53 0.65 0.46 2.09 2.60 1.30 0.60 2.27 0.37 0.46 2.88 1.58 0.70 0.23 1.39 0.51 0.42 2.27 1.16 0.28 0.23 0.46 0.37 0.19 1.53 1.02 0.14 0.05 13.83 5.57 5.15 33.70 30.69 7.52 3.20-STABILITY CLASSES-Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable Wind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 0.46 1.21 0.84 0.37 0.00 0.00 0.00 0.79 4.46 2.83 0.74 0.00 0.00 0.00 1.76 4.50 3.06 0.19 0.00 0.00 0.00 2.79 3.48 1.62 0.00 0.00 0.00 0.00 2.51 2.83 0.46 0.00 0.00 0.00 0.00 1.11 3.02 0.42 0.00 0.00 0.00 0.00 0.97 2.23 1.21 0.28 0.00 0.00 0.00 0.56 2.92 1.30 0.14 0.00 0.00 0.00 0.32 1.81 2.97 0.84 0.09 0.00 0.00 0.32 0.84 1.81 1.95 0.46 0.00 0.00 0.74 1.62 1.39 0.97 0.05 0.00 0.00 1.11 3.57 0.93 0.65 0.05 0.00 0.00 2.55 3.81 2.23 0.60 0.05 0.00 0.00 1.95 3.57 2.09 0.88 0.00 0.00 0.00 1.02 3.11 1.90 0.23 0.00 0.00 0.00 0.32 1.72 1.39 0.32 0.00 0.00 0.32 19.31 44.71 26.46 8.17 0.70 0.00-WIND SPEED CLASSES-CALM< 3.5 mph 3.6 -7.5 mph 7.6 -12.5 mph 12.6 -18.5 mph 18.6 -24.5 mph> 24.5 mph Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847)963-9ooo TABLE 9-18-Braidwood Generating Station 34 ft. Wind Speed and Direction July-September.

2009 199Ft-3OFt Delta-T (F)NumNber of Observations

-2158 Values are Percent Occurrence SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

CLASS N NNE NE ENE E ESE SE SSE S SSW SW"WSW W WNW NW NNW TOTAL-.-------

STABILITY CLASSES ..........

EU K) SU N SS Ps ES TOTAL EU mU C SU A N L SS Nm s ES EU MU 1 SU.N 3 SS MS ES EU MU 4 SU-N 7 SS MS ES EU MU 8 SU-N 1 SS 2 MS ES EU I1NU 3 SU-N 1 SS 8ms ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.28 0.46 0.70 0.37 0.79 0.14 0.05 0.51 0.32 0.05 0.00 0.09 0.09 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.19 0.23 0.74 0.70 0.65 0.88 0.28 0.19 0.65 1.20 0.00 0.00 0.09 0.05 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.14 0.14 0.93 1.99 1.11 0.19 1.95 0.37 0.09 1.34 0.37 0.00 0.00 0.23 0.05 0.05 0.28 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.23 0.19 0.09 1.34 2.46 1.39 0.70 1.53 0.60 0.23 1.44 0.51 0.00 0.00 0.05 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.19 0.09 0.88 1.62 1.30 0.37 0.65 0.14 0.00 0.42 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.05 0.32 0.79 0.97 0.28 0.23 0.19 0.00 0.97 0.42 0.19 0.00 0.05 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.14 0.37 0.09 0.05 0.32 0.23 0.14 0.56 1.71 0.05 0.00 0.23 0.09 0.00 0.23 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.28 0.00 0.51 0.09 0.32 0.65 0.74 0.00 0.00 0.14 0.00 0.05 0.32 0.19 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.09 0.14 0.05 0.37 0.14 0.14 0.32 1.58 0.00 0.00 0.09 0.09 0.05 0.42 0.42 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.09 0.23 0.00 0.19 0.00 0.00 0.28 1.25 0.14 0.00 0.88 0.09 0.09 1.25 1.02 0.00 0.00 0.42 0.00 0.05 0.23 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.05 0.09 0.14 0.05 0.46 0.05 0.09 0.89 0.65 0.09 0.00 0.79 0.19 0.23 1.02 0.42 0.05 0.00 0.09 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.32 0.51 0.51 0.28 0.65 0.37 0.00 1.25 0.97 0.51 0.00 0.60 0.23 0.19 0.46 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.42 1.34 1.44 0.28 1.11 0.14 0.05 0.65 0.70 0.05 0.00 0.83 0.09 0.14 0.23 0.00 0.00 0.00 0.00 0.09 0.19 0.37 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.09 0.46 1.20 1.16 0.74 1.58 0.32 0.19 1.34 0.37 0.00 0.00 0.46 0.00 0.00 0.32 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.09 0.28 0.60 0.60 0.37 1.99 0.23 0.19 0.88 0.70 0.00 0.00 0.23 0.14 0.05 0.37 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.42 0.60 0.56 0.23 0.93 0.14 0.14 1.07 0.51 0.00 0.00 0.32 0.05 0.09 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.65 0.65 0.79 0.83 6.16 13.11 11.31 4.59 14.13 14.13 3.43 1.81 13.21 12.23 1.07 0.00 5.10 5.10 1.16 0.93 5.14 2.50 0.05 0.00 0.51 0.51 0.09 0.28 0.70 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.79 0.83 6.16 13.11 11.31 4.59 37.44 3.43 1.81 13.21 12.23 1.07 0.00 45.88 1.16 0.93 5.14 2.50 0.05 0.00 14.87 0.09 0.28 0.70 0.23 0.00 0.00 1.81 Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9ooo TABLE 9 continued-19-Braidwood Generating Station 34 ft. Wind Speed and Direction July-Septenter.

2009 199Ft-30Ft 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 1KU 9 SU-N 2 5S 4MS ES EU GMU T SU N 2 SS 4 MS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00*0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 TOT 3.99 5.93 9.36 10.80 6.02 4.54 4.40 3.43 3.99 6.30 5.47 7.04 8.25 8.43 6.81 5.24 100.00 20.39 5.47 3.85 25.21 28.08 12.42 4.59 100.00 Wind Direction by Stability N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL -STABILITY CLASSES-0.88 0.23 0.14 0.79 0.83 0.74 0.37 0.97 0.37 0.37 0.93 1.95 0.70 0.65 2.32 0.56 0.28 2.55 2.36 1.11 0.19 1.81 0.79 0.32 2.78 3.01 1.39 0.70 0.79 0.32 0.09 1.30 1.85 1.30 0.37 0.32 0.19 0.05 1.34 1.20 1.16 0.28 0.65 0.32 0.14 0.93 2.18 0.14 0.05 0.65 0.09 0.37 0.97 1.07 0.28 0.00 0.46 0.23 0.23 0.79 2.09 0.14 0.05 1.48 0.09 0.14 1.81 2.41 0.37 0.00 1.34 0.28 0.32 2.04 1.16 0.28 0.05 1.25 0.65 0.19 2.04 1.62 1.02 0.28 1.95 0.32 0.37 1.67 2.18 1.48 0.28 2.04 0.37 0.28 2.13 1.71 1.16 0.74 2.22 0.42 0.32 1.53 1.34 0.60 0.37 1.25 0.23 0.23 1.62 1.11 0.56 0.23 20.39 5.47 3.85 25.21 28.08 12.42 4.59 Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable Wind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 1.90 1.85 0.23 0.00 0.00 0.00 0.00 2.55 3.20 0.19 0.00 0.00 0.00 0.00 4.63 4.12 0.60 0.00 0.00 0.00 0.00 6.39 4.3i 0.09 0.00 0.00 0.00 0.00 4.59 1.44 0.00 0.00 0.00 0.00 0.00 2.46 1.99 0.09 0.00 0.00 0.00 0.00 0.74 3.01 0.65 0.00 0.00 0.00 0.00 0.42 2.32 0.70 0.00 0.00 0.00 0.00 0.32 2.55 1.07 0.05 0.00 0.00 0.00 0.37 1.85 3.34 0.74 0.00 0.00 0.00 0.37 2.22 2.69 0.19 0.00 0.00 0.00 1.67 3.75 1.62 0.00 0.00 0.00 0.00 3.48 2.69 1.30 0.79 0.00 0.00 0.00 3.71 3.80 0.93 0.00 0.00 0.00 0.00 1.99 3.99 0.79 0.05 0.00 0.00 0.00 1.85 2.78 0.60 0.00 0.00 0.00 0.00 37.44 45.88 14.87 1.81 0.00 0.00-WIND SPEED CLASSES-.C AL M< 3.5 mph 3.6 -7.5 mph 7.6 -12.5 mph 12.6 -18.5 mph 18.6 -24.5 mph> 24.5 mph Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847)963-9ooo TABLE 10-20-Braidwood Generating Station 34 ft. Wind Speed and Direction October-December.

2009 199Ft-3OFt Delta-T (F)Number of Observations

-2172 Values are Percent Occurrence SPEED ----------------------------------

WIND DIRECTION CLASSES.........

STABILITY CLASSES ..........

EU MU SU N SS MS ES TOTAL CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL EU MU C SU A N L SS" MS ES EU MU 1 SU-N 3 SS MS ES EU MU 4 SU.N 7 SS MS ES EU MU 8 SU-N 1 SS 2MS ES EU 1 U 3 SU-N I SS 8HS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.28 0.05 0.09 0.00 0.00 0.00 0.00 0.69 0.23 0.00 0.00 0.14 0.05 0.00 0.51 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.32 0.28 0.14 0.00 0.00 0.00 0.00 1.34 0.60 0.00 0.00 0.14 , 0.00 0.00 0.28 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.60 0.28 0.14 0.28 0.09 0.00 0.09 1.84 0.51 0.09 0.00 0.05 0.05 0.00 1.15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.32 0.60 0.14 0.09 0.18 0.00 0.05 2.39 0.23 0.00 0.00 0.00 0.00 0.00 1.52 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.69 0.60 0.64 0.23 0.05 0.00 0.00 1.29 0.60 0.09 0.00 0.00 0.00 0.00 1.15 0.46 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.28 0.51 0.18 0.18 0.00 0.00 0.05 0.64 1.43 0.28 0.05 0.00 0.00 0.00 0.60 0.46 0.00 0.00 0.00 0.00 0..00 0.05 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.18 0.05 0.14 0.05 0.05 0.05 1.34 1.93 0.05 0.00 0.00 0.09 0.00 1.06 1.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.14 0.09 0.09 0.09 0.09 0.18 1.80 1.89 0.00 0.00 0.05 0.09 0.23 1.89 1.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.09 0.05 0.00 0.18 0.09 0.78 1.70 0.09 0.00 0.09 0.14 0.23 1.75 2.62 0.00 0.00 0.14 0.05 0.05 0.55 0.28 0.00 0.00 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 0.00 0.18 0.09 0.46 0.37 0.09 0.00 0.23 0.23 0.18 1.70 1.29 0.05 0.00 0.28 0.05 0.05 1.34 0.51 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.14 0.09 0.14 0.14 0.09 0.00 0.00 1.06 0.46 0.09 0.00 0.14 0.18 0.18 2.76 0.64 0.00 0.00 0.00 0.00 0.05 1.15 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.14 0.09 0.23 0.14 0.00 0.09 0.18 2.72 1.43 0.37 0.00 0.46 0.23 0.14 2.58 0.51 0.00 0.00 0.00 0.05 0.00 0.60 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.64 0.51 0.41 0.23 0.23 0.18 0.14 2.21 0.60 0.09 0.00 0.51 0.14 0.09 1.93 0.23 0.00 0.00 0.32 0.14 0.00 0.92 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.23 0.74 0.55 0.18 0.09 0.09 0.32 1.75 0.78 0.32 0.00 0.28 0.05 0.00 1.57 0.09 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.46 0.51 0.14 0.00 0.09 0.05 0.09 0.92 0.60 0.05 0.00 0.23 0.05 0.00 0.97 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.05 0.14 0.28 0.05 0.05 0.14 0.09 0.09 0.92 0.37 0.00 0.00 0.05 0.09 0.00 1.57 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.23 4.51 4.93 3.13 1.84 0.00 0.09 0.23 4.51 4.93 3.13 1.84 14.73 1.10 1.10 1.01 1.43 22.15 13.72 1.61 0.05 2.35 2.35 1.38 1.06 22.97 8.56 0.05 0.00 0.74 0.74 0.32 0.14 5.02 1.15 0.00 0.00 1.01 1.43 22.15 13.72 1.61 0.05 41.07 1.38 1.06 22.97 8.56 0.05 0.00 36.37 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.05 0.00 0.14 0.05 0.00 0.32 0.14 5.02 1.15 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 7.37 Murray & Trettel, Inc. 6oo First Bank Driue, Suite A Palatine, Illinois 60067 (847) 963-9ooo TABLE 10 continued-21-Braldwood Generating Station 34 ft. Wind Speed and Direction October-Decenber.

2009 199Ft-3OFt Oelta-T (F)SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL.........

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

EU MU SU N SS MS ES TOTAL EU I1MU 9 SU-N 2 SS 4MS ES EU G MU T SU N 2 SS 4MS ES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.41 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.41 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.41 0.00 0.00 0.00 0.41 0.00 0.00 0.05 0.00 0.00 0.00 0.05 TOT 2.16 3.08 5.20 5.57 5.85 4.74 6.26 8.10 8.98 7.18 7.46 10.45 9.62 7.14 4.19 4.01 100.00 4.19 2.81 2.85 55.11 28.36 4.79 1.89 100.00 Wind Direction by Stability N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAl.0.14 0.05 0.00 1.61 0.28 0.09 0.00 0.14 0.00 0.00 1.93 0.87 0.14 0.00 0.14 0.18 0.05 0.00 0.14 0.09 3.59 4.24 0.78 0.83 0.23 0.14 0.28 0.09 0.05 0.00 0.05 3.13 1.66 0.74 0.23 0.00 0.00 0.05 1.57 2.44 0.46 0.23 0.05 0.14 0.05 2.53 3.27 0.09 0.14 0.14 0.23 0.41 3.96 3.18 0.09 0.09 0.23 0.37 0.37 3.08 4.70 0.18 0.05 0.51 0.46 0.32 3.50 2.16 0.18 0.05 0.23 0.23 0.23 5.11 1.29 0.23 0.14 0.46 0.37 0.32 6.49 2.07 0.60 0.14 1.06 0.46 0.23 5.71 1.43 0.51 0.23 0.37 0.14 0.37 3.59 1.61 0.87 0.18 0.32 0.09 0.09 2.35 1.15 0.18 0.18 0.23 0.14 2.72 0.64 0.05 4.19 2.81 2.85 55.11 28.36 4.79-STABILITY CLASSES-Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable 0.00 0.0S 1.89 Wind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 0.00 0.41 0.92 0.69 0.14 0.00 0.00 0.00 0.74 1.93 0.41 0.00 0.00 0.00 0.00 1.34 2.62 1.24 0.00 0.00 0.00 0.00 1.20 2.85 1.52 0.00 0.00 0.00 0.00 2.21 2.03 1.61 0.00 0.00 0.00 0.00 1.15 2.44 1.06 0.09 0.00 0.00 0.00 0.51 3.45 2.26 0.05 0.00 0.00 0.00 0.46 4.05 3.36 0.23 0.00 0.00 0.00 0.23 2.85 4.83 1.06 0.00 0.00 0.00 0.09 1.20 3.68 2.21 0.00 0.00 0.00 0.55 1.70 3.91 1.29 0.00 0.00 0.00 0.60 4.79 3.91 0.69 0.41 0.05 0.00 1.80 3.45 2.90 1.47 0.00 0.00 0.00 1.75 3.36 1.98 0.05 0.00 0.00 0.00 1.10 1.80 1.29 0.00 0.00 0.00 0.00 0.60 1.61 1.70 0.09 0.00 0.00 0.00 14.73 41.07 36.37 7.37 0.41 0.05-WIND SPEED CLASSES-CALM< 3.5 mph 3.6 -7.5 mph 7.6 -12.5 mph 12.6 -18.5 mph 18.6 -24.5 mph> 24.5 mph Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 TABLE 11 Generating Station 34 ft. Wind Speed and Direction January-December.

2009 199Ft-3OFt Oelta-T (F)Number of Observations

-8632 Values are Percent Occurrence SPEED ----------------------------------

WIND DIRECTION CLASSES ----------------------------------

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL---------

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

EU MU SU N SS MS ES TOTAL EU MU C SU A N L SS MMS ES EU MU 1 SU-N 3 SS MS ES EU MU 4 SU-N 7 SS MS ES EU MU o SU-N ISS 2 M ES EU 1MU 3 SU.N 1 SS 8"S ES 0,00 0,00 0,00 0,00 0.00 0.00 0.00 0.00 0.00 0.02 0.16 0.27 0.27 0.10 0.27 0.06 0.05 0.54 0.30 0.02 0.00 0.07 0.07 0.06 0.57 0.06 0.00 0.00 0.01 0.00 0.01 0.15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.07 0.19 0.42 0.27 0.17 0.37 0.12 0.10 1.25 0.85 0.01 0.00 0.32 0.16 0.06 0.70 0.05 0.00 0.00 0.06 0.01 0.01 0.28 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0,00 0.03 0.07 0,05 0.50 0.83 0.42 0.19 0.72 0.14 0,10 1.62 0,49 0.03 0,00 0,27 0.10 0,12 1,27 0,02 0,00 0.00 0,00 0,00 0.00 0,17 0,01 0,00 0,00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.06 0.07 0.53 1.22 0.65 0.36 0.58 0.21 0.09 1.67 0.64 0.01 0.00 0.02 0.01 0.03 0.80 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0,00 0.00 0.00 0.03 0.07 0.06 0.53 0.94 0.76 0.31 0.32 0.16 0.08 0.90 0.66 0.05 0.00 0.03 0.00 0.02 0.44 0.13 0.00 0.00 0.00 0.00 0.00 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 0.20 0.46 0.44 0.19 0.16 0.08 0.08 0.89 1.23 0.15 0.06 0.05 0.00 0.01 0.43 0.23 0.00 0.00 0.00 0.03 0.00 0.10 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.01 0.02 0.12 0.23 0.12 0.08 0.17 0.21 0.10 0.78 1.36 0.14 0.02 0.12 0.09 0.06 0.56 0.64 0.00 0.00 0.05 0.01 0.00 0.16 0.07 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.00 0.05 0.15 0.14 0.05 0.20 0.14 0.21 0.96 1.36 0.02 0.00 0.21 0.09 0.12 0.98 0.82 0.00 0.00 0.00 0.03 0.01 0.15 0.07 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.09 0.10 0.02 0.10 0.09 0.09 0.45 1.22 0.03 0.00 0.15 0.10 0.12 1.03 1.59 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 0.06 0.09 0.02 0.05 0.08 0.07 0.36 0.54 0.14 0.00 0.31 0.09 0.09 1.01 1.04 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.01 0.07 0.10 0.13 0.09 0.16 0.06 0.10 0.68 0.60 0.13 0.01 0.28 0.13 0.13 1.33 0.67 0.02 0.00 0.08 0.09 0.06 0.59 0,12 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.15 0.28 0.35 0.17 0.23 0.15 0.15 1.23 1.40 0.76 0.08 0.37 0.19 0.14 0.92 0.34 0.01 0.00 0.08 0.05 0.03 0.22 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.01 0.36 0.81 0.85 0.29 0.54 0.20 0.14 1.18 1.02 0.34 0.03 0.50 0.16 0.13 1.04 0.30 0.01 0.00 0.19 0.09 0.08 0.60 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.05 0.38 0.93 0.70 0.29 0.73 0.17 0.27 1.49 1.07 0.13 0.00 0.71 0.13 0.07 1.52 0.23 0.00 0.00 0.21 0.03 0.02 0.24 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.03 0.32 0.67 0.34 0.15 0.80 0.16 0.16 0.95 0.93 0.05 0.00 0.41 0.15 0.06 1.02 0.12 0.00 0.00 0.07 0.00 0.01 0.09 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.03 0.01 0.15 0.31 0.22 0.08 0.37 0.10 0.13 0.90 0.68 0.02 0.00 0.21 0.12 0.05 1.10 0.12 0.00 0.00 0.06 0.01 0.02 0.27 0.00 0.00 0.00 0.02 0.02 0.02 0.01 0.03 0.01 0.00 0.00 0.21 0.21 0.41 0.44 3.77 7.77 5.83 2.57 5.78 5.78 2.13 1.93 15.86 14.33 2.04 0.21 4.02 4.02 1.60 1.25 14.71 6.37 0.08 0.00 1.24 1.24 0.49 0.52 4.22 1.29 0.00 0.00 0.02 0.01 0.03 0.01 0.00 0.00 0.10 0.41 0.44 3.77 7.77 5.83 2.57 20.99 2.13 1.93 15.86 14.33 2.04 0.21 42.28 1.60 1.25 14.71 6.37 0.08 0.00 28.04 0.06 0.08 0.12 0.47 0.39 0.00 0.00 0.38 0.03 0.14 0.71 0.44 0.00 0.00 0.49 0.52 4.22 1.29 0.00 0.00 7.75 Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 TABLE 11 continued-23-Braidwood Generating Station 34 ft. Wind Speed and Direction January-December.

2009 199Ft-3OFt Delta-T (F)SPEED ----------------------------------

WIND DIRECTION CLASSES ..................................

CLASS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL---------

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

EU MU SU N SS MS ES TOTAL EU 1MU 9 SU-N 2 SS 4MS ES EU GMU T SU N 2 SS 4MS ES 0.00 0.00 0.00 0.00 0-. 00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00.0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.07 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.00 0.02 0.13 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.12 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.03 0.02 0.08 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 0,00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.06 0.03 0.07 0.46 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.03 0.07 0.46 0.09 0.00 0.00 0.72 0.00 0.00 0.01 0.00 0.00 0.00 0.01 TOT 3.06 5.49 7.16 7.03 5.51 4.84 5.14 5.82 6.45 5.99 5.72 7.52 9.14 9.41 6.52 .4.98 99.90 11.33 4.68 4.23 39.06 29.87 7.95 2.78 99.90 Wind Direction by Stability N NNE NE ENE E ESE SE SSE S SSW SW WSW WNW NW NNW TOTAL 0.35 0.13 0.14 1.42 0.63 0.29 0.10 0.76 0.30 0.24 2.41 1.32 0.28 0.17 1.02 0.31 0.27 3.57 1.36 0.45 0.19 0.66 0.28 0.20 3.00 1.88 0.66 0.36 0.39 0.23 0.16 1.88 1.73 0.81 0.31 0.22 0.12 0.12 1.61 1.95 0.59 0.24 0.37 0.32 0.19 1.61 2.29 0.25 0.10 0.41 0.29 0.34 2.17 2.41 0.16 0.05 0.32 0.28 0.32 2.06 3.30 0.14 0.02 0.79 0.22 0.32 2.22 2.14 0.27 0.02 0.52 0.31 0.31 2.70 1.49 0.28 0.10 0.70 0.39 0.35 2.64 2.06 1.12 0.25 1.23 1.66 0.51 0.36 0.38 0.41 3.27 3.65 2.24 2.22 1.19 0.62 0.32 0.29 1.27 0.34 0.27 2.39 1.73 0.38 0.15 0.64 0.27 0.21 2.43 1.11 0.24 0.08 11.33 4.68 4.23 39.06 29.87 7.95 2.78-STABILITY CLASSES-Extremely Unstable Moderately Unstable Slightly Unstable Neutral Slightly Stable Moderately Stable Extremely Stable Wind Direction by Wind Speed N NNE NE ENE E ESE SE SSE S SSW SW W W WNW NW NNW TOTAL 0.00 0.82 1.24 0.82 0.17 0.00 0.00 0.00 1.14 2.70 1.29 0.37 0.00 0.00 0.00 2.09 3.10 1.78 0.19 0.00 0.00 0.00 2.94 3.20 0.89 0.00 0.00 0.00 0.00 271 2.18 0.63 0.00 0.00 0.00 0.00 1.32 2.64 0.72 0.16 0.00 0.00 0.00 0.61 2.78 1.46 0.29 0.00 0.00 0.00 0.41 2.88 2.22 0.27 0.03 0.00 0.00 0.25 1.99 2.99 1.12 0.09 0.00 0.00 0.21 1.24 2.58 1.70 0.25 0.00 0.00 0.44 1.75 2.56 0.94 0.03 0.00 0.00 0.98 4.01 1.96 0.43 0.13 0.01 0.00 2.34 3.45 2.14 1.05 0.15 0.00 0.00 2.37 3.86 2.65 0.51 0.01 0.00 0.00 1.54 3.05 1.75 0.19 0.00 0.00 0.00 0.81 2.21 1.59 0.36 0.01 0.00 0.10 20.99 42.28 28.04 7.75 0.72 0.01-WIND SPEED CLASSES-CALM< 3.5 mph 3.6 -7.5 mph 7.6 -12.5 mph 12.6 -18.5 mph 18.6 -24.5 mph> 24.5 mph Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9000 5.5 Precipitation Monthly totals and the maximum 24-hour and maximum 1-hour precipitation amounts are summarized below. The month with the most measured precipitation was October. The month with the least measured precipitation was January*.

The maximum 24-hour total was 2.37" (May) and the maximum 1-hour total was 1.06" (June*).Table 12 Precipitation Totals (Inches) -2009 Braidwood Site Maximum Maximum Month Total 24-hour 1-hour January 0.58' 0.16' 0.05'February 3.20* 1.55' 0.51'March 2.82* 0.98* 0.31'April 6.21 1.28 0.39 May 6.21 2.37 0.66 June 6.83* 1.77* 1.06'July 2.67* 0.94* 0.55*August 4.60 2.06 0.60 September 1.23 0.93 0.31 October 8.28 1.55 0.44 November 1.47' 0.62' 0.18'December 2.95* 0.71* 0.21*TOTAL: 47.05*some data are missing -actual precipitation may be under-reported Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847)963-9ooo 5.6 Doses Resultina from Airborne Releases The following are the maximum annual calculated cumulative offsite doses resulting from Braidwood Station airborne releases.Unit 1: Dose gamma air (I)beta air (2)whole body (3)skin (4)organ (5) (teenager-thyroid)

Maximum Value 7.357 x 10s mrad 5.025 x 10" mrad 3.931 x 105 mrem 2.403 x 104 mrem 1.067 x 10.2 mrem Sector Affected West West West West West Unit 2: Dose gamma air (0)beta air (2)whole body (3)skin (4)organ (5) (teenager-thyroid)

Maximum Value 8.277 x 10"5 mrad 5.783 x 10.4 mrad 4.709 x 10"s mrem 2.715 x 104 mrem 4.415 x 1073 mrem Sector Affected West West West West West (1)(2)(3)(4)(5)Gamma Air Dose -Finite Cloud Model; M+T ODCM Rev. 9 Beta Air Dose -Finite Cloud Model; M+T ODCM Rev. 9 Whole Body Dose -Finite Cloud Model; M+T ODCM Rev. 9 Skin Dose -Finite Cloud Model; M+T ODCM Rev. 9 Inhalation and Food Pathways Dose -Finite Cloud Model; M+T ODCM Rev. 9 Murray & Trettel, Inc. 6oo First Bank Driue, Suite A Palatine, Illinois 60067 (847)963-9000 TABLE 13 Braidwood Station -Unit I MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES 2009 TYPE OF DOSE FIRST QUARTER SECOND QUARTER THIRD QUARTER FOURTH QUARTER ANNUAL GAMMA AIR (mrad)BETA AIR (mrad)WHOLE BODY (mrein)SKIN (mrem)ORGAN (mrem)CRITICAL PERSON CRITICAL ORGAN 5.130E-06(WNW) 6.150E-05(WNW) 2.590E-06(WNW) 2.740E-05(WNW) 3.540E-03(WNW) 1.250E-05( SW)7.020E-05( W )7.770E-06( SW)3.750E-05( W )4.190E-03( W )1.620E-05(WSW) 9.810E-05(WSW) 7.0SOE-06( SW)3.310E-05( SW)1.400E-03(WSW) 4.540E-05( W )2.890E-04( W )2.390E-05( W )1.460E-04( W )2.080E-03( W )7.357E-05( W )5.025E-04( W )3.931E-05( W )2.403E-04( W )1.067E-02( W )Teenager Thyroid Teenager Thyroid Teenager Liver Teenager Liver Teenager Thyroid COMPLIANCE STATUS TYPE OF DOSE GAMMA AIR (mrad)BETA AIR (mrad)WHOLE BODY (mrem)SKIN (mrem)ORGAN (mrem)CRITICAL PERSON CRITICAL ORGAN 10 CFR 50 APP. I QUARTERLY OBJECTIVE 5.0 10.0 2.5 7.5 7.5 10 CFR 50 APP.I Z OF APP. I YEARLY OBJECTIVE 0.00 0.00 0.00 0.00 0.06 10.0 20.0 5.0 15.0 15.0% OF APP. I 0.00 0.00 0.00 0.00 0.07 Teenager Thyroid Teenager Thyroid Calculation used release data from the following:

Unit i -Vent Date of calculation:

3/23/2010 Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-gooo .BLE 13 itinued Braidwood Station -Unit 2 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES 2009 TYPE OF DOSE FIRST QUARTER SECOND QUARTER THIRD QUARTER FOURTH QUARTER ANNUAL GAMMA AIR (mrad)BETA AIR (mrad).WHOLE BODY (mrem)SKIN (mrem)ORGAN (mrem)CRITICAL PERSON CRITICAL ORGAN 5. 130E-06(WNW)

6. 150E-05(WNW) 2.410E-06(WNW)

2. 720E-05(WNW) 4.21CE-04(WNW) 1.250E-05( SW)7.020E-05( W )7,770E-06( SW)3.620E-05( W 1.350E-03( W )1.670E-0S(WSW) 1.010E-04(WSW) 1.140E-O5.(WSW) 3.790E-05( W )I.110E-03(WSW) 5.430E-05( W )3.620E-04( W )2.870E-05( W )1.730E-04( W4)1.700E-03( W )8.277E-05( W )5.783E-04( W4 )4.709E-05( W )2.715E-04( W4 )4.415E-03( W )Teenager Liver Adult Liver Teenager Thyroid Teenager Thyroid Teenager Thyroid COMPLIANCE STATUS 10 CFR 50 APP. I QUARTERLY OBJECTIVE

% OF APP. I TYPE OF DOSE GAMMA AIR (mrad)BETA AIR (mrad)WHOLE BODY (mrem)SKIN (mrem)ORGAN (mrem)CRITICAL PERSON CRITICAL ORGAN 5.0 10.0 2.5 7,5 7.5 0.00 0.00 0.00 0.00 0.02 10 CFR 50 APP.!YEARLY OBJECTIVE 10.0 20.0 5.0 15.0 15.0 Z OF APP. I 0.00 0.00 0.00 0.00 0.03 Teenager Thyroid Teenager Thyroid Calculation used release data from the following:

Unit 2 -Vent Date of calculation:

3/23/2010 Murray & Trettel, Inc. 600 First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9ooo APPENDIX Murray & Trettel, Inc. 6oo First Bank Drive, Suite A Palatine, Illinois 60067 (847) 963-9ooo Exelon Contract Number 80633 Braidwood Meteorological Calibration E4 6/08 R-26 Page 1 of 7 Date: '3~ sq,..Ce POWER SUPPLIES+15.OOOV

• 0.150V A:+ j~Pi,02 V 6:I',' -Y5-15.OOOV

• o.150V A:- IS, B: -J %S. o --V Signal Conditioners I Digital Recorder: Signal Conditioner Voltage Out Digital recorder Specifications AF AL PRCPLO ;O 0' V PRCPHI 4 -9e V-" V"- V AL EQUIV AF AL 3 ft.,0 " , 0t " "- " WS ZERO -1i -V WS SPAN -1 okfb V., ZERO .Vdu e-V WD SPAN51,br7.._V T LO r.ci5~ v THI-L ýy6~TOHP-LO J~lV DPH LO C~ V DP HI-LO ý 0-4. V WS ZERO -Qj__V WS SPAN U.LIO__V WD ZERO LJq-V WD SPAN LS;41_V AT LO -'~ 00V AT HI id9A4 -6V AT HI -LO A. CilW V-V-- V-V* V-V-- V V-V 34 ft?.ujmpI" (on0.0 mpl I-1lc. °SiI l. 0 h 0.oN mph -mph h u.'c. mph -mph-L o 0 1:11. Vi- o t S,,,ignal Cond.0.050V +/- 0.050V 5.OOOV +/- 0.050V 0.01 5V +/- 0.025V 5.00OV +/- 0.025V 0.000V +/- 0.100V 5.OOOV +/- 0.100V 5.OOOV +/- 0.050V 5.OOOV +/- 0.050V 0.01 5V +/- 0.025V 5.OOOV +/- 0.025V 0.OOOV +/- 0.1OOV 5.OOOV +/- 0.100V 5.OOOV +/- 0.200V Recorder AL EQUIV +/- 0.01" AL EQUIV +/- 0.01" AL EQUIV +/- 0.1mph AL EQUIV +/- 0.1mph AL EQUIV +/- 10 AL EQUIV +/- 10 AL EQUIV +/- 0.1OF AL EQUIV +/- 0.1°F AL EQUIV +/- 0.1 0 F AL EQUIV +/- 0.1°F-16A -016s a a 203 f t-V to,...-...mph V i ML. 6 jmph La I .- V 5-13 --L V-, -2 mph -mph 10, 0 mph "" mph_______a -0 54t'b o .-___a ____a -a'9,1Q 3.o -- o AL EQUIV +/- 0.1mph AL EQUIV +/- 0.1mph AL EQUIV +/- 1 0 AL EQUIV +/- 10 AL EQUIV +/- 0.1°F AL EQUIV +/- 0.1°F Murray & Trettel, Inc.

• 60o First Bank Drive, SuiteA .Palatine, Illinois.

60067 3 (847) 963-9000 Exelon Contract Number 80633 E5 6/08 Braidwood Meteorological Calibration R-26 Page 2 of 7 Date: 3- " 1 TOWER MEASUREMENTS

[0 Ambient C] ice Bath Measured Recorded Difference Specification Temperatures 30 ft. Amb. 199 ft. AT AF AL AF AL°F , _ °F -I,-,oF -" F°F OF 1-50 °F -F SUOF O- F .0 F -F+0.5 0 F +0.18°F Winds 30 ft. dew point AF AL OF 4 5F J., O °F +2.7°F WS stall Forw. WD Revr. WD Tracking/wear 34 ft.AF AL',,'3 mph mph 0 IL 203 ft.AF AL 0,'& mph '3_mph ,3. .Specification 0.3mph +/- 0.45mph 30/3630 +/- 50 1830 +/- 50 Comments:

WS (V11 tAý;') e £\ V~\15!M C~(0 k Out all~Wf4J VK7OCdi5q 1 r4,1hIle~

0 A Ma SLa , l -in .49 Murray & Trettel, Inc. -600 First Bank Drive, Suiite A -Palatine, Illinois -600673 (847) 963-9000 E6 6108 Braidwood Meteorological Calibration R-26 Page 3 of 7 Date: ' (i- /Dates of Last Wind Sensor Bearing Replacements:

34 ft. 203 ft.(6 mos.) Wind Speed: ....o--(12 mos.) Wind Direction:

7-D "-30 ft. 199 ft.Aspirators:

__ _- OIL-Operation of De-ice Heat Lamp System (Aug-Mar):

tL Operation of Rain Gauge: OIL-Debris screen: In C"Out,,/ Installed Removed Tower Lighting Good- Fair Poor Tower Condition Good Fair Poor Beacon R1 0 El Paint 1 0 0 Side lights 2 E0 E1 Guy wire tension 13 0 r" Wiring El E' rl Flasher 13 0 0 Shelter condition 0 0 0 Note: Calibration Instruments:

AF = As Found Psychrometer

-SIN -qq 9 W 0 ZiL" AL = As Left Digital multimeter-S/N -v'rlov-= no change (AF=AL) Digital multimeter

-SIN -FS = Full Scale echnicians:

MOiýPr l'Y,,% _

• Y .L ,_Comments: Signature:

a u Murray & Trettel, Inc. 6oo First Bank Drive, Suite A .Palatine, Illinois.

60067 2 (847) 963-9000 Ei R-2f Page 4 of j System Response Check Date: o'Site: Braidwood System: Microtel Low Scale 34' WS 203' WS 34' WD 203' WD 30' T 199' AT 30' DP Check Expected 10.0 +/-0.4 10.0 +/-0.4 54 +/-2 54 +/-2 -7.60 +/-0.5 -8.00 +/-0.18 -7.60 +/-0.5 Response As Found Response 10,C) 57L) 5"___ -*-'*. ,-- ___" As Left -Response Mid Scale 34' WS 203' WS 34' WD 203' WD 30' T 199' AT 30' DP Check .....Expected 50.0 +/-0.4 50.0 +/-0.4 270 +/-2 270 +/-2 50.00 +/-0.5 0.00 +/-0.18 50.00 +/-0.5 Response As Found Response 5 c _____. 27" _ _ _.9 , As Left Response Full Scale 34' WS 203' WS 34' WD 203' WD 30' T 199' AT 30' DP Check Expected 90.0 +/-0.4 90.0 +/-0.4 486 +/-2 486 +/-2 107.60 +/-0.5 8.00 +/-0.18 107.60 +/-0.5 Response ., As Found eespo s>Response __ _ _ ),).j..(As Left. -.Response .AsL 4. q-Lj-oc Murray & Trettei, Inc. -600 First Bank Drive, SuiteA .Palatine, Illinois .60067 W (847) 963-9000 Ef 6/01 R-2(Page 5 of 'System Response Check Date: 3"(. cI Site: Braidwood System: Process Computer -English Units Low Scale Y4011 Y4012 Y4013 Y4014 Y4015 Y4016 Y4017 Y4019 Check 34' WS 34' WD 203' WS 203' WD 30' T 199' AT 30' 1P Precipitation Expected 10.0 +/-0.4 54 +/-2 10.0 +0.4 54 +/-2 -7.60 +/-0,5 -8.00 +/-0.18 -7.60 +/-0.5 0.10 +/-0.01 Response ._.As Found Response t5 __,___ -1.- -"1,(As Left .- -Response Mid Scale Y4011 Y4012 Y4013 Y4014 Y4015 Y4016 Y4017 Y4019 Check 34' WS 34' WD 203' WS 203' WD 30' T 199' AT 30' DP Precipitation Expected 50.0 +/-0.4 270 +/-2 50.0 +/-0.4 270 +/-2 50.0 +/-0.5 0.00 +/-0.18 50.0 +/-0.5 0.50 +/-0.01 Response ..... ..As Found Response _ _L_ _ _____ _-7__- __._O_ eO.N, As Left Response Full Scale Y4011 Y4012 Y4013 Y4014 Y4015 Y4016 Y4017 Y4019 Check 34' WS 34' WD 203' WS 203' WD 30' T 199' AT 30' DP Precipitation Expected 90.0 +/-0.4 486 +/-2 90.0 +/-0.4 486 +/-2 107.60 +/-0.5 8.00 +/-0.18 107.60 +/-0.5 0.90 +/-0.01 Response As Found Response C 4_",_i_ 9cUV .O 6 I0:90I As Left ., Response -_ TUI --I... -- 1/-%4j $S*IAg O & f(.(ire ....'. 60 r 0 L(61 L r, S 9-. A IQ06 Y8) L *3-0 1 A5-L. 4-ILIf-o9 Murray & Trettel, Inc. -600 First Bank Drive, Suite A -Palatine, Illinois -60067 2(847) 963-90oo Ah%....~*

~ a. ~ -a 610f R-2(Page 6 of j System Response Check Date: '>(, Cvq Site: Braidwood System: Process Computer -Metric Units Low Scale Y4000 Y4001 Y4002 Y4003 Y4004 Y4005 Y4006 Check 34' WD 34' WS 30' T 199' ,T 30' DP 203' WD 203' WS Expected 54 +/-2 4.5 +/-0.2 -22.00 +0.3 -8.50 to0.1 -22.00 +/-0.3 54 +/-2 4.5 +/-0.2 Response ......As Found Response 5-1 _ , _ -2 ,0 -- __z , _,_ _, _ I .As Left Response .--Mid Scale Y4000 Y4001 Y4002 Y4003 Y4004 Y4005 Y4006 Check 34' WD 34' WS 30' T 199' AT 30' DP 203'.WD 203' WS Expected 270 +/-2 22.35+/-0.2 10.00 +/-0.3 0.00 +0.1 10.00 +/-0.3 270 +/-2 22.35 +/-0.2 Response As Found Response _ 22.30 0 9S 10.0 2.-Z -As Left .- 1 9 Response I ----Full Scale Y4000 Y4001 Y4002 Y4003 Y4004 Y4005 Y4006 Check 34' WD 34' WS 30' T 199' AT 30' DP 203' WD 203'.WS Expected 486 +/-2 40.5 +/-0.2 42.00 +/-0.3 8.50 +/-0.1 42.00 +/-0.3 486 +/-2 40.5 +/-0.2 Response ......As Found Response 40__ _ ~ .1-1 LIZ-CQ S,___ ___4 _ I.__b_As Left Response Murray & Trettel, Inc.

• 600 Frst Bank Drive, Suite A .Palatine, Illinois -60067 2 (847) 963-9ooo I F Page 7 System Response Check 'Date: __"_ ____Site: Braidwood System: Control Room Indicators Mid Scale 34' WS 203' WS 34' WD 203' WO 34' T 199' AT 30' DP Check __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ___ _ _ _ _ _ _ _ _ _Expected 50.0 +/-0.4 50.0 +/-0.4 270 +2 270 +/-2 50.00 +/-0.6 0.00 +/-0.18 50.0 +/-0.5 Response ......___As Found Response 5-0 ;-) L.C _ 2__.G__ _ 0_ _As Left -Response -Full _al 34' WS 203' WS 34' WD 203' WD 34'T 199' AT 30' DP Expected 90.0 +/-0.4 90.0 +/-0.4 486 *2 486 +/-2 107.60 *0.5 8.00 +/-0.18 107.60 *0.5 Response...

As Found Response 9 C c _____ q -' IDS _As Left .Response ........Murray & Trettel, Inc. -6oo First Bank Drive, Suite A .Palatine, Illinois.

6o067 2 (847) 963-9o00 Exelon Contract Number 80633 Braidwood Meteorological Calibration Date: E4 6/08 R-26 Page 1 of 7 POWER SUPPLIES+15.o000V+/-

0.150V A: /T, 0+ 9V B: + i5', 0 00 V-15. OOOV+/- 0.150V A: -I S' 13 0 _V B: -IT, V Signal Conditioners I Digital Recorder: Sigqnal Conditioner Voltaoqe Out Digital recorder Specifications AF AL AL EQUIV PRCP L O4.06_V PRCP HI 5;. o0 V-V lo "-V l-.' 00o AF AL 3 ft."o- ", , IF --. , WS ZERO ,Oq--V WSSPANf,O(O_

V"A'n ZEROJ0(a V SPAN -.OI V T LO OO1ý V T HI i-, ve 5' V THI -LO , V DP LO L V DP HI 5,I V DP HI-LO I,_ V ATLO -050 V ATHI q _10 V AT Hi- LO S,3"0 V 203 ftI-V 03,0 mphV (~o.L' mph-V? ? '-vs .SHJ" V-t'- °0 1 ?*- V q.q* V 0,3 mph -mphmph _____mph 0 0-0______-. ______0.015V +/- 0.025V 5.OOOV +/- 0.025V 0.000V +/- 0.100V 5.OOOV +/- 0.1OOV 5.OOOV +/- 0.200V AL EQUIV +/- 0.1 mph AL EQUIV 1 0.1mph AL EQUIV t 1O AL EQUIV +/- 10 AL EQUIV +/- 0.1OF AL EQUIV +/- 0.1°F yL q-q-'V-o Murray & Trettel, Inc.

• 600 First Bank Drive, Suite A .Palatine, Illinois .6006711 (847) 963-9000 Exelon Contract Number 80633 E5 6/08 Braidwood Meteorological Calibration R-26 Page 2 of 7 Date: ?TOWER MEASUREMENTS Ambient [3 Ice Bath Measured Recorded 'Difference Specification WS stall Forw. WD Revr. WD Tracking/wear 1~Temperatures 30 ft. Amb. 199 ft. ,dT AF AL AF AL.0 OF O °F J,N1 F ___°F I O°F OF 4156 OF OF°F -°F ,OF_ -0.5 0 F +0.18°F Winds 34 ft. 20 AF AL AF b,3I mph __mph 0.3 mph 113 -0 I a __a ~ to 30 ft. dew point AF AL 5.6" °F 55 F 67. t F ._6.5" °F 2- 1 °F I1 °F+/-2.70F 3 ft.AL mph 0 Specification 0.3mph + 0.45mph 3013630 t 50 1830 + 50 O-01" Comments: Murray & Trettel, Inc. .6o0 First Bank Driue, Suite A .Palatine, Illinois .600672 (847) 963-9000 Braidwood Meteorological Calibration E6 6/08 R-26 Page 3 of 7 Date: 1-7-02 Dates of Last Wind Sensor Bearing Replacements:

34 ft.(6 mos.) Wind Speed: U- &-" (12 mos.) Wind Direction:

G-C0 203 ft.& -o=i 30 ft. 199ft, Aspirators:

W CAL Operation of De-ice Heat Lamp System (Aug-Mar):

'Operation of Rain Gauge: 6$-Debris screen: (ix) Out Installed Removed Tower Li-ghtinaq Good Fair Poor Tower Condition Good Fair Poor Beacon [ 0 0 Paint 10 0- 0 Side lights El 0 0 Guy wire tension 17 0 0 Wiring EI 0-Flasher 0 E 0 Shelter condition 17 1 " 0 Note: Calibration Instruments:

AF = As Found Psychrometer-S/N -AL = As Left Digital multimeter

-SIN -,elCM -,= no change (AF=AL) Digital multimeter

-S/N -FS = Full Scale echnicians:

MiK71FfDV.,Ik , if k( f--j , Comments: Signature:.

_ _ _ '. _ _.._Murrayc& Trettel, Inc. -600 First Bank Drive, Suite A -Palatine, Illinois.

6o067 28 (847) 963-9000 E 6/0 R-2 Page 4 of Date: ?-7*o System Response Check Site: Braidwood System: Microtel Checkcl 34' WS 203'WS 34'WOWD 203' WD 30' T 199' AT 30'DP Checkt Expected Response 10.0 +/-0.4 10.0 +0.4 54:+/-2 54 +/-2-7.60 +/-0.5-8.00 +/-0.18-7.60 +/-0.5 As Found Response 10.6 _ _ 9-1 L 7-7_ __AsLeft Response Mid Scale 34' WS 203' WS 34' WD 203' WD 30' T 199' AT 30' DP Check_, Expected 50.0 +/-0.4 50.0 +/-0.4 270.t2 270 +/-2 50.00 +/-0.5 0.00 +/-0.18 50.00 +/-0.5 Response .. ..___....As Found Response 150.O __ _ _ 92170 S0 As Left --Response Full Scale 34' WS 203' WS 34' WD 203' WD 30' T 199' AT 30' DP Check Expected 90.0 -0.4 90.0 +/-0.4 486 +/-2 486:+/-2 107.60 +/-0.5 8.00 +/-0.18 107.60 +/-0.5 Response .. ... ....__ __ __ __ _ __ __ __ _ _ __ _ _ __ _ _Response As Found Response _______ _____g5__

________ __6-7___ _____0 As Left Response _Murray & Trettel, Inc. .600 First Bank Driue, Suite A .Palatine, Illinois .6o067 W (847) 963-9000 E 6/0 R-2 Page 5 of System Response Check Date: __-_'?_Site: Braidwood System: Process Computer -English Units Low Scale Y4011 Y4012 Y4013 Y4014 Y4015 Y4016 Y4017 Y4019 Check 34' WS 34' WD 203' WS 203' WD 30' T 199' AT 30' DP Precipitation Expected 10.0 +/-0.4 54 +/-2 10.0 +/-0.4 54 +/-2 -7.60 +/-0.5 -8.00 +/-0.18 -7.60 +/-0.5 0.10 +/-0.01 Response As Found Response io-ol. O .2' C6OA 2- -ýo -01'. L, --, s -"7.(,l As Left Response Mid Scale Y4011 Y4012 -Y4013 Y4014 Y4015 Y4016 Y4017 Y4019 Check 34' WS 34' WD 203' WS 203' W D 30' T 199' AT 30' DP Precipitation Expected 50.0 +/-0.4 270 +/-2 50.0 +/-0.4 270 +/-2 50.0 +/-0.5 0.00 +/-0.18 50.0 +/-0.5 0.50 +/-0.01 Response As Found 1t J 0 tr 5-0 b S1 Response -i.-1 ,,VI',, As Left ..- ,- -Response Full Scale Y4011 Y4012 Y4013 Y4014 Y4015 Y4016 Y4017 Y4019 Check 34' WS 34' WD 203' WS 203' WD 30' T 199' AiT 30' DP Precipitation Expected 90.0 +/-0.4 486 +/-2 90.0 +/-0.4 486 +/-2 107.60 +/-0.5 8.00 +/-0.18 107.60 +/-0.5 0.90 +/-0.01 Response _ _._As Found Response 9, .., .O , j .32 "7.% /f .9. .q(As Left -Response __I_______

A-si ct--c Murray & Trettel, Inc. -600 First Bank Drive, Suite A .Palatine, Illinois .60067 1 (847) 963-9000

-E!6/0J R-21 Page 6 of'System Response Check Date: _7 7-_Site: Braidwood System: Process Computer -Metric Units Low Scale Y4000 Y4001 Y4002 Y4003 Y4004 Y4005 Y4006 Check 34' WO 34' WS 30' T 199' AT 30' DP 203' WD 203' WS Expected 54 *2 4.5 +/-0.2 -22.00 +/-0.3 -8.50 +/-0.1 -22.00 +/-0.3 54 +/-2 4.5 +/-0.2 Response As Found Response 1- L 7Z -LZ..la -Cr to '5--t -b S As Left ...--- -Response Mid Scale Y4000 Y4001 Y4002 Y4003 Y4004 Y4005 Y4006 Check 34' WD 34' WS 30' T 199' AT 30' DP 203' WD 203' WS Expected 270 +/-2 22.35+0.2 10.00 +/-0.3 0.00 +/-0.1 10.00 +/-0.3 270 +/-2 22.35 +/-0.2 Response., As Found Response 27 .,, z (o ", lo. " As Left " --Response .Full Scale Y4000 Y4001 Y4002 Y4003 Y4004 Y4005 Y4006 Check 34' WD 34' WS 30' T 199' AT 30' DP 203' WD 203' WS Expected 486 +/-2 40.5 +/-0.2 42.00 +/-0.3 8.50 +/-0.1 42.00 +/-0.3 486:+/-2 40.5 +/-0.2 Response ,., As Found 4 I Response _ _,_ _ _ i O"-IO.34 I-' i9/ 1 ., 2- ___,[__,_

_ I____.___,___

As Left ---Response ......Murray & Trettel, Inc. -600 First Bank Drive, Suite A .Palatine, Illinois *6oo67 2 (847) 963-9ooo El[R-2E Page 7 of 7 System Response Check Date: --Site: Braidwood System: Control Room Indicators Low Scale 34' WS 203' WS 34' WD 203' WD 34' T 199' AT 30' DP Check Expected 10.0 +/-0.4 10.0 +0.4 54 +2 54 +/-2 -7.60 +/-0.5 -8.00 +/-0.18 -7.60 +/-0.5 Response ,.As Found Response f. /0 .,LI ,- -e --As Left -Response ......Full Scale 34' WS 203' WS 34' WD 203' WD 34' T 199' AT 30' DP Expected 90.0 +/-0.4 90.0 +/-0.4 486 :2 486+/-t2 107.60 +/-0.5 8.00 +/-0.18 107.60 +/-0.5 Response .....As Found Response _ _ _ _ _ _ ) L t 1(17 __ /_07 As Left --- -Response ......ý&411q A A 1 Murray & Trettel, Inc. -6oo First Bank Drive, Suite A .Palatine, illinois.

6o067 I (847) 963-9ooo Exelon Contract Number 80633 Braidwood Meteorological Calibration E4 7/09 R-27 Page 1 of 7 Date: 11-2, 0-01 POWER SUPPLIES+15.OOOV 1 0.150V A:+ / 5% 0(oO V B: + 1t.,q07 V Signal Conditioners I Digital Recorder:-1 5.OOOV +/-0. 150V A: -/C) _V B: -~ 0'3c> V Sigqnal Conditioner Voltage Out Digital recorder Specifications AF AL AL EQUIV AF AL PRCP LO 0-, 5V -V 0, 01 PRCPHI 5-. OD6 V -V ,bob i 3 ft.40,0 1 to I, DjO of I,-P9 34 ft.WSZERO 0-013 V ___V 0.°(o mph +/-1,3 mph -__mph WS SPAN 14qqj V -Vlqq[1S mph .qq,' mph -mph*""ZERO 001 V -V 2.0__ 2. I -J SPAN 4f.44. V -V 03r. It 0 -, TLO 5 i V v V Zl.G,8 .-2.1.,"1 .--- , THI ______V -V /V-,77 a 1/1 .72. -, THI-LO t V -V DPLO V-P V -V-I',' _* " k DPHI V -. V 12".-T-1 4 ° 11 ,.f- -1 DPHI-LO 'i.'4 2. V -V Signal Cond.0.050V +/- 0.050V 5.000V +/- 0.050V 0.015V i 0.025V 5.000V +/- 0.025V 0.000V +/- 0.1OV 5.OOOV 1 0.1OOV 5.OOOV + 0.050V 5.OOOV +/- 0.050V Recorder AL EQUIV 1 0.01" AL EQUIV +/- 0.01" AL EQUIV +/- 0.1mph AL EQUIV +/- 0.1mph AL EQUIV+/- 1 a AL EQUIV +/- 1a AL EQUIV +/- 0.1°F AL EQUIV +/- 0.1°F AL EQUIV +/- 0.1°F AL EQUIV + 0.16F WSZERO .0 1'I V -V WSSPAN T'1'3 V -f- 000 V ,Y.Dpzo .,0 V -V ATLO "'00V -V ATHI 9,0 V -- V ATHI-LO ,0q. V -V 203 f t O .A0 mph/00 mph-1J0,3., 7 a '6 31 mph -- ,.mph/X,) .mph " mph 2 .a = "I -o 5"Y 34.o 015V i 0.025V.5.OOOV +/- 0.025V 0. OOOV +/- 0.I1OOV 5.OOOV t 0.100V AL EQUIV +/- 0.1mph AL EQUIV 1 0.1mph AL EQUIV +/- 1 0 AL EQUIV +/- 1°AL EQUIV +/- 0.1OF AL EQUIV +/- 0.1°F 5.OOOV +/- 0.200V Ai- -Murray & Trettel, Inc.

• 6oo First Bank Drive, Suite A .Palatine, Illinois .6oo67 2 (847) 963-9000 Exelon Contract Number 80633 E5 7109 Braidwood Meteorological Calibration R-27 Page 2 of 7 Date: 1420., -TOWER MEASUREMENTS j~r&Q9 [ Ice Bath Measured Recorded Dfference Specification W8 stall Forw. WD Revr. WD Tracking/wear Tern;30 ft. Amb.AF AL A q 9 2.vo OF _ OF -9, U 1 T 1 1 F ___.°F -I.Xi°OF OF*0.5 0 F o0.34 ft.AF AL 0.'> mph 0.3 mph a a__ __ 199 ft. AT%F AL 50 OF -F P F -i3 OF " F Ninds 30 ft. dew point AF AL-6q F 31 OF IjP F O~9 F ,3ýQ F OI F t2.7OF 203 ft.AF AL O. mph O 5- mph 35B0 -a I1Zo -0 0)4 Seeciflcation 0.3mph

• 0.45mph 30/3630

• 50 1830 +/- 50 Comments:

34 ,Lr r/AS2L (-54.1 Braidwood Meteorological Calibration 7/09 R-27 Page 3 of 7 Date: J-'Zo"o9 Dates of Last Wind Sensor Bearing Replacements:

34ft. 203 ft.(8 mos.) Wind Speed: ,[C)9 , 1) I" -01 (12 mos.) Wind Direction:

b ___0___ 0 9 30 ft. 199 ft.Aspirators:

OV Operation of De-ice Heat Lamp System (Aug-Mar):

_Operation of Rain Gauge: ij Debris screen: In Out Installed Tower Lihtina Good Fair Poor Tower Condition Good Fair Poor Beacon 0 001 Paint 0 0 1 Side lights E-l 0 0 Guy wire tension 0 0 0 Wiring. E7 1 0 0 Flasher 0 0 0 Shelter condqon 0 0] 03 Note: Calibration Instruments:

I\AF = As Found Psychrometer-SIN- #I"b q ('4-10) , AL = As Left Digital multimeter

-SIN -q9 E, KO

-= no change (AF=AL) Digital multimeter

-SIN -FS = Full Scale rechnicians:

RU II M M, -,. 4 9 Comments:

H,4) " .,c4"E.. T g_,1 0,,,sz-J V,4Olq Y. " I U0? fi (~oo4 T'^A Q.0 44 -t ýJ cly N toy,('. .4 Jý Q, 6rj~v1,J V-.LL Signature:

&5"L 1-.7-10 7 RP Page 4 c System Response Check Date: /-20 -o q Site: Braidwood System: Microtel Low Scale 34' WS 203' WS 34' WD 203' WD 30' T 199' AT 30' DP Check _____ __________

____Expect 10.0 *0.4 10.0 +/-0.4 54.2 54+/-2 -7.60 +/-0.5 -8.00:+/-0.18

-7.60 +0.5 Response _.As Found Response I0.0 I0.0 'As Left --Response -A32- 1, 5-Iab Murray & Tvett4l Inc..- 600 Fint Banik Ddg;e Suite A .Palatine, Ilbtis .60067 W(847) 963,900W 7 RP Page 5 c System Response Check Date:l// 2..0-4 Site: Braidwood System: Process Computer -English Units Low Scale Y4011 Y4012 Y4013 Y4014 Y4015 Y4016 Y4017 Y4019 Check 34' WS 34' WD 203' WS 203' WD 30' T 199' AT 30' DP Precipitation Expected 10.0 +/-0.4 54 +/-2 10.0 +/-0.4 54+/-2 -7.60 +0.5 -8.00 +/-0.18 -7.60 +/-0.5 0.10 +/-0.01 Response As Found Response io,0 02- 5-I.XV .qV, .-i.so3 -0.o3 -i7,fqq 0.1 As L e ft I.--_ --IO r Response .....Mid Scae Y4011 Y4012 Y4013 Y4014 Y4015 Y4016 Y4017 Y4019 Chec__ 34' WS 34' WD 203' WS 203' WD 30' T 199' AT 30' DP Precipitation Expected 50.0 +/-0.4 270+/-2 50.0 +/-0.4 270 +2 50.0 A0.5 0.00 +/-0.18 50.0 +/-0.5 0.50 -0.01 Response As Found Response DA,497 ., :l 6.O'4- L°t,.O -oo'-II 50I1t6 0,62.As Left Response Full Scale Y4011 Y4012 Y4013 Y4014 Y4015 Y4016 Y4017 Y4019 Execk 34' WS 34' WD 203' WS 203' WD 30' T 199' &T 30' DP Precipitation Espected 90.0 +/-0.4 486 t2 90.0 +/-0.4 486+/-t2 107.60 +/-0.5 8.00 +/-0.18 107.60 +/-0.5 0.90 +/-0.01 Response ______As Found Response 14_,___ Ljgt, ,(o 2q.V(, IoW.- .-p 1 _______ __-.___ ._._51_7 As Left -" Response .Murray & Tre*r Inc .-600 laint Bank Driw, Swite A .Pakano4e I~linis -60067 9 (847) 963.9000 7 Ra Page 6 c System Response Check Date:_________

Site: Braidwood System: Process Computer -Metric Units Low Scale Y4000 Y4001 Y4002 Y4003 Y4004 Y4005 Y4006 Check 34'WD 34'WS 30'T 199'AT 30'DP 203'WD 203'WS Expected 54+/-2 4.5 +/-0.2 -22.00 +0.3 -8.50 +0.1 -22.00 +/-0.3 54+/-2 4.5 +0.2 Response As Found Response L.i ',3'" "- '1 . -, .*13 As Left Response , Mid Scale Y4000 Y4001 Y4002 Y4003 Y4004 Y4005 Y4006 Pheck 34'WD 34'WS 30'T 199Y AT 30'DP 203'WD 203'WS Expected 270:12 22.35+/-0.2 10.00 10.3 0.00 +/-0.1 10.00 +0.3 270+/-2 22.35 :0:2 Response , As Found Response 9T53,0 __,____ q.qjo. -',.'O z00.'('dS As Left Response I -.. -. J Full Scale Y4000 Y4001 Y4002 Y4003 Y4004 Y400e Y4006 Check 34' WD 34'WS 30'T 199' &T 30' DP 203' WD 203' WS Expected 486 +/-2 40.5 +/-0.2 42.00+/-0.3 8.501+/-0.1 42.00+/-0.3 48682 40.5 +/-0.2 Response As Found Response qO ,11_5_ 07L 14 1 j,15-00 LIZ. 1570 ) * ,ý.. ,b As Left ' --Response _____ _____ __________

Muffay & Tretu, Inc. 600 Rur Bank Drive, Suite A. Palatine, llinais 60067 W (847) 963-9000 E 7 RP Page 7 c System Response Check Date: I 1- 0-0 0 7 Site: Braidwood System: Control Room Indicators Low Scale 34' WS 203' WS 34' WD 203' WD 34' T 199' AT 30' DP Check__ _ _ _ _ __ _ _ _ _ __ _ _ _ _Expected 10+/-+1.0 10+/-1.0 54 +2 54 +/-2 -7.6 +/-1.0 -8.0 +/-1.0 -7.6 *1.0 Response ....As Found Response 57_ _ ~9 _ _ __ _ _ _As Left Response ,,.Mid Scale 34' WS 203' WS 34' WD 203' WD 34' T 199' AT 30' DP Check Expected 50s 1.0 50 +/-1.0 270 +/-2 270+/-2 50.0 -1.0 0.0+/-1.0 50.0 +/-1:0 Response As Found Respom 560 Si) 9.____ "7. _,,,__ _" _ 0.0 _ _>'As Left -Response Full Scal 34' WS 203' WS 34' WD 203' WD 34' T 199' AT 30' DP Check Expected 90 +/-1.0 90 +/-1.0 486+/-2 486+/-2 107.6 +/-1.0 8.0 +1.0 107.6 +/-1.0 Reslp.nse As Found Response _ _ 9 '-fJ(- /0"7 V, 1 1 oiýAs Left -....Response ..Muffay & TTCUA I=c.. 600 Fi,~t Bank Dnw, Suit- A .Pao4ne Minos -6006 7 11(84 7)963,9000 M&T 2009 ANNUAL REPORTS ON THE EXELON NUCLEAR METEOROLOGICAL MONITORING PROGRAM X I approve the following draft report(s) with no changes: Dresden Station Zion Station LaSalle Station X( Braidwood Station Byron Station Quad Cities Station Clinton Power Station Three Mile Island Generating Station Peach Bottom Atomic Power Station Limerick Generating Station.Oyster Creek Generating Station I approve the following draft report(s) with the indicated changes (comments attached):

Dresden Station Zion Station-LaSalle Station Braidwood Station Byron Station, Quad Cities Station Clinton Power Station Three Mile Island Generating Station Peach Bottom Atomic Power Station Limerick Generating Station Oyster Creek Generating Station Signature Date EXELON NUCLEAR 4300 WINFIELD ROAD WARRENVILLE IL 60555 Murray & Trettel, Inc. 600 First Bank Drioe, Suite A Palatine, Illinois 60067 (847) 963-9000