ML061420310

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2005 Annual Effluent Release Report
ML061420310
Person / Time
Site: River Bend Entergy icon.png
Issue date: 04/13/2006
From: Boyle M, Spell W, Vinci D
Entergy Operations
To:
Office of Nuclear Reactor Regulation
References
RG-1.021
Download: ML061420310 (65)
v • d • e


Text

2005 ANNUAL EFFLUENT RELEASE REPORT PREPARED BY: I, ;Is William H. pell, Jr. / Senior Environmental Specialist REVIEWED BY: Fie rAen.Y A,.Aoee /gZs Michael J. Boyle / Radiation Protection Manager APPROVED BY:

Donald W. Vinci / General Manager Plant Operations

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 TABLE OF CONTENTS PAGE I. INTRODUCTION 4 II. SUPPLEMENTAL INFORMATION A. Regulatory Limits 4 B. Effluent Concentration Limits 7 C. Measurements and Approximations of Total Radioactivity 7 D. Batch Releases 9 E. Abnormal Releases 9 F. Estimate of Total Error 9 III. GASEOUS EFFLUENT

SUMMARY

INFORMATION 10 IV. LIQUID EFFLUENT

SUMMARY

INFORMATION 10 V. SOLID WASTE 1I VI. RADIOLOGICAL IMPACT ON MAN 11 VII. METEOROLOGICAL DATA 11 VIII. RADIOACTIVE LIQUID EFFLUENT MONITORING INSTRUMENTATION OPERABILITY 11 IX. RADIOACTIVE GASEOUS EFFLUENT MONITORING INSTRUMENTATION OPERABILITY 11 X. LIQUID HOLDUP TANKS 12 XI. RADIOLOGICAL ENVIRONMENTAL MONITORING 12 XII. LAND USE CENSUS 12 XIII. OFFSITE DOSE CALCULATION MANUAL (ODCM) 12 XIV. MAJOR CHANGES TO RADIOACTIVE LIQUID, GASEOUS AND SOLID WASTE TREATMENT SYSTEMS 13 XV. PROCESS CONTROL PROGRAM (PCP) 14 TABLES Table IA Gaseous Effluent - Summation of All Releases 15 Table lB Gaseous Effluent - Ground Level Releases 16 Table iC Gaseous Effluent - Ground Level Batch Release 17 2

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 Table ID Gaseous Effluent - Mixed Mode Continuous Releases 18 Table IE Gaseous Effluent - Mixed Mode Batch Releases 19 Table IF Radioactive Gaseous Waste Sampling and Analysis Program 20 Table IG Maximum Individual Doses Due to Gaseous Releases 21 Table 2A Liquid Effluent - Summation of All Releases 22 Table 2B Liquid Effluent - Continuous Mode 23 Table 2C Liquid Effluent - Batch Mode 24 Table 2D Liquid Batch Information 25 Table 2E Radioactive Liquid Waste Sampling and Analysis Program 26 Table 2F Liquid Dose Summary 27 Table 3 Solid Waste and Irradiated Fuel Shipments 28 Table 4 Assumptions/Parameters for Doses to Member of the Public Inside Site Boundary 30 Table 5 Doses to Members of the Public on Site from Gaseous Releases 31 Table 6 Meteorological Data - Joint Frequency Tables 32 Table 7 Atmospheric Dispersion Factors 66 ATTACHMENT I - OFFSITE DOSE CALCULATION MANUAL (ODCM) 3

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 I. INTRODUCTION This is the annual Radioactive Effluent Release Report for the period of January 1, 2005, through December 31, 2005. This report is submitted in accordance with Technical Specification 5.6.3 of Appendix A to River Bend Station (RBS) License Number NPF-47.

I. SUPPLEMENTAL INFORMATION A. Regulatory Limits

1. 10CFR50, Appendix I Limits
a. Fission and Activation Gases In accordance with Technical Requirement (TR) 3.11.2.2, the air dose due to noble gases released in gaseous effluent to areas at and beyond the SITE BOUNDARY shall be limited to:

DGanma-Air = gamma air dose from radioactive noble gases in millirad (mrad) n

= 3.17E-8 I: Mi (X/Q) Qi < 5 mrads/qtr i=1 < 10 mrads/yr DBeta-Air = beta air dose from radioactive noble gases in millirad (mrad) n

= 3.17E-8 Z N (X/Q) Qi <10 mrads/qtr i=1 < 20 mrads/yr

b. Radioiodines (I-131 & I-133) and Particulate In accordance with Technical Requirement 3.11.2.3, the dose to a MEMBER OF THE PUBLIC from radioiodines (I-131 and I-133), tritium (H-3) and all radionuclides in particulate form with half-lives greater than 8 days, in gaseous effluent releases to areas at and beyond the SITE BOUNDARY shall be limited to:

DL&8DpX = Dose in mrem to the organ (T) for the age group of interest from radioiodine (I-13 1, I-133, tritium, and 8 day particulate via the pathway of interest.)

n

= 3.17E-08 (Fj) Pil (X/Q) Qi and I=1 n

= 3.17E-08 (Fo) R1 l (D/Q) Qi and I=1 4

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 n

D, = . DI&8DPX < 7.5 mrem/qtr z=I < 15 mrem/yr (above terms defined in the RBS ODCM)

c. Liquid Effluent In accordance with Technical Requirement 3.11.1.2, the dose or dose commitment to a MEMBER OF THE PUBLIC from radioactive materials in liquid effluent released to UNRESTRICTED AREAS shall be limited to:

Dir = &At (DF) Dw and n

DTOTALT= E Di, i=1 DToTALT= Total dose commitment to the organ (T) due to all releases during the desired time interval in mrem and DTOTAL Total Body < 1.5 mrem/qtr

< 3 mrem/yr DTOTAL Any Organ < 5 mrem/qtr

< 10 mrem/yr (above terms defined in RBS ODCM)

2. 40CFRl90 Limits In accordance with Technical Requirement 3.11.4, the annual (calendar year) dose or dose commitment to any MEMBER OF THE PUBLIC, due to releases of radioactivity and to radiation from uranium fuel cycle sources, shall be limited to:

< 25 mrem to the total body or any organ (except the thyroid)

< 75 mnrem to the thyroid

3. Miscellaneous Limits
a. Technical Requirement 3.11.2.1 - Fission and Activation Gases 5

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 In accordance with Technical Requirement 3.11.2.1, the dose rate due to radioactive materials released in gaseous effluents from the site to areas at and beyond the SITE BOUNDARY shall be less than or equal to 500 millirems/year (mrem/yr) to the total body and less than or equal to 3000 mrem/yr to the skin:

DRTB = Dose rate to the total body in mrem/yr n

= 2 K1 (X/Q) Qi <500mrem/yr and i=1 DRsKN= Dose rate to the skin in mrem/yr n

= Z L + l.lM 1 (X/Q) Qi <3000mremlyr i=l (above terms defined in RBS ODCM)

b. Technical Requirement 3.11.2.1 - Radioiodine (I-131 & I-133) and Particulate In accordance with Technical Requirement 3.11.2.1, the dose rate due to radioiodines, tritium, and all radionuclides in particulate form with half-lives greater than 8 days released in gaseous effluents from the site to areas at and beyond the SITE BOUNDARY shall be limited to less than or equal to 1500 mrem/yr to any organ:

DRI&8Dp, = Dose rate to the organ T for the age pathway group of interest from Radioiodines (I-131 & 1-133), tritium, and 8 day particulate via the inhalation pathway in mrem/yr.

n

= E P1 (X/Q) Q' < 1500 mrem/yr i=1 (above terms defined in RBS ODCM)

c. Technical Requirement 3.11.1.1 - Liquid Effluent In accordance with Technical Requirement 3.11.1.1, the concentration of radioactive material released in liquid effluent to UNRESTRICTED AREAS shall be limited to ten times the concentrations specified in 10CFR20, Appendix B, Table 2, Column 2 for radionuclides other than dissolved or entrained noble gases. For dissolved or entrained noble gases, the concentration shall be limited to 2.OE-04 microcuries/milliliter total concentration.

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River Bend Station 2005 Regulatory Guide 1.21 4/1312006

d. Technical Requirement 3.11.2.5 - Ventilation Exhaust Treatment System In accordance with Technical Requirement 3.11.2.5, the VENTILATION EXHAUST TREATMENT SYSTEM shall be used to reduce radioactive materials in gaseous waste prior to their discharge when the projected doses, due to gaseous effluent releases to areas and beyond the SITE BOUNDARY would exceed 0.3 mrem to any organ in a 31-day period.
e. Technical Requirement 3.11.1.3 - Liquid Radwaste Treatment System In accordance with Technical Requirement 3.11.1.3, the liquid radwaste treatment system shall be used to reduce the radioactive materials in liquid waste prior to their discharge when the projected doses, due to the liquid effluent, to UNRESTRICTED AREAS would exceed 0.06 mrem to the total body or 0.2 mrem to any organ in a 3 1-day period.

B. Effluent Concentration Limits I1. Gaseous Releases The concentrations of radioactive gaseous releases are based on the dose rate restrictions in RBS Technical Requirements, rather than the Effluent Concentration Limits (ECL) listed in 10CFR20 Appendix B, Table 2, Column 1.

2. Liquid Releases The Effluent Concentration Limits of radioactive materials in liquid effluent is limited to ten times 10CFR20, Appendix B, Table 2, Column 2.

C. Measurements and Approximations of Total Radioactivity I1. Gaseous Effluent

a. Fission and Activation Gases Periodic grab samples are obtained from the Main Plant Exhaust Duct, Fuel Building Exhaust Vent and Radwaste Building Exhaust Vent.

These samples are analyzed using high purity germanium detectors coupled to computerized pulse height analyzers. The sampling and analysis frequencies are described in Table IF.

Sampling and analysis of these effluent streams provide noble gas radionuclide relative abundance that can then be applied to the noble gas gross activity and gross activity release rate to obtain nuclide specific activities and release rates. The noble gas gross activity released within a specific time period is determined by integrating the stack monitor 7

River Bend Statio 2005 Regulatory Guide 1.21 4/13/2006 release rate over the considered time period. If no activity was detected between the stack grab sample and a significant increase in hourly averages was recorded, the nuclide relative abundance of the last sample (or the last similar event), which indicated the presence of activity, was used to obtain nuclide specific activities. Correction factors for the monitors are derived and applied for each sampling period whenever noble gas radionuclides are detected in the effluent stream.

b. Particulate and Radioiodine (I-131 & I-133)

Particulates, Iodine-131 and Iodine-133 are continuously sampled from the three release points using a particulate filter and charcoal cartridge in line with a sample pump (stack monitor pump). These filters and charcoal cartridges are removed and analyzed in accordance with the frequencies specified in Table 1. Analysis is performed to identify and quantify radionuclides using high purity germanium detectors coupled to computerized pulse height analyzers. Given the nuclide specific activity concentrations, process flow rate, and duration of the sample; the nuclide specific activity released to the environment can be obtained.

Due to the continuous sampling process, it is assumed that the radioactive material is released to the environment at a constant rate within the sampling period. Strontium-89 and Strontium-90 (Sr-89 and Sr-90) are quantitatively analyzed by counting by Scintillation techniques (Chrenkov counting). Gross alpha analysis is performed using a zinc sulfide scintillation counter.

C. Tritium Tritium grab samples are obtained from the three release points at the specified frequencies listed in Table 1 using an ice bath condensation collection method. The collected sample is then analyzed using a Liquid Scintillation Counter. Given the tritium concentration, process flow rate, and time period for which the sample is obtained, the tritium activity released to the environment can be determined. Due to the frequency of sampling, it is assumed that the tritium is released to the environment at a constant rate within the time period for which the sample is obtained.

2. Liquid Effluent Representative grab samples are obtained from the appropriate sample recovery tank and analyzed prior to release of the tank in accordance with the frequencies listed in Table 2. Analysis for gamma emitting nuclides (including dissolved and entrained noble gases) is performed using a high resolution germanium detector coupled to a computerized pulse height analyzer. Tritium concentration is determined using a liquid scintillation counter. Strontium-89 and Strontium-90 are quantitatively analyzed by Scintillation techniques (Chrenkov counting). Iron-55 is counted with a liquid scintillation counter after digestion of the iron. Gross alpha analysis is performed using a zinc sulfide scintillation counter.

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River Bend Station 2005 Regulatory Guide 1.21 4/1312006 Given the nuclide specific activity concentration and total volume of the tank that was released, the activity of each nuclide released to the environment can be determined.

D. Batch Releases Liquid Effluents Batch releases and receiving stream flow from River Bend Station during the reporting period of January 1,2005, through December 31, 2005 are shown in Table 2D.

The Mississippi River stream flow is obtained by averaging data from the U. S. Army Corp of Engineers website using flow gauge data at Tarbert Landing.

Gaseous Effleunts There were no batch releases of gaseous effluents from River Bend Station during the reporting period of January 1, 2005, through December 31, 2005.

E. Abnormal Releases There were no abnormal liquid or gaseous releases during the reporting period of January 1, 2005, through December 31, 2005.

F. Estimate of Total Error

1. Liquid The maximum error associated with sample collection, laboratory analysis, and discharge volume is collectively estimated to be:

Fission and Activation Products  : + 14.2%

Tritium  : + 14.2%

Dissolved and Entrained Noble Gases  : + 14.2%

Gross Alpha Radioactivity  : + 14.2%

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River Bend Station 2005 Regulatory Guide 1.21 4/13/2006

2. Gaseous The maximum errors (not including sample line loss) associated with sample flow, process flow, sample collection, monitor accuracy and laboratory analysis are collectively estimated to be:

Noble Gases  : + 37.0%

lodines . + 18.6%

Particulate . + 18.6%

Tritium  : + 18.2%

3. Determination of Total Error The total error (i.e., collective error due to sample collection, laboratory analysis, sample flow, process flow, monitor accuracy, etc.) is calculated using the following equation:

ET = \/ ((Es)' + (E2 ) + (En))

where:

ET = total error El, E2 . ..En = individual errors due to sample collection, laboratory analysis, sample flow, process flow, monitor accuracy, etc.

mII. GASEOUS EFFLUENT

SUMMARY

INFORMATION Refer to the Table 1 series for "Summation of All Releases" and "Nuclides Released,"

respectively. It should be noted that an entry of "0.OOE+00" Curie (Ci) or microcurie/second (uCi/sec) in this section indicates that the concentration of the particular radionuclide was below the Lower Limit of Detection (LLD) as listed in Table iF. Also, any nuclide not appearing in the tables was < LLD for all four quarters.

IV. LIQUID EFFLUENT

SUMMARY

INFORMATION Refer to the Table 2 series for "Summation of All Releases and Nuclides Released." It should be noted that an entry of "0.OOE+00" Ci or uCi/ml in this section indicates that the concentration of the particular radionuclide was below the Lower Limit of Detection (LLD) as listed in Table 2D. Also, any nuclide not appearing in the tables was < LLD for all four quarters.

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River Bend Station 2005 Regulatory Guide 1.21 4113/2006 V. SOLID WASTE Refer to Table 3, for "Solid Waste and Irradiated Fuel Shipments."

VI. RADIOLOGICAL IMPACT ON MAN (40CFR190)

An assessment was made of radiation doses to the likely most-exposed member of the public from River Bend and other nearby uranium fuel cycle sources (none within five miles). The annual (calendar year) dose or dose commitment to any MEMBER OF THE PUBLIC, due to releases of radioactivity and to radiation from uranium fuel cycle sources, shall be limited to less than or equal to 25 mrem to the total body or any organ, except the thyroid, which shall be limited to less than or equal to 75 mrem.

Total Body = 7.53E-02 mrem Skin = 4.26E-02 mrem Thyroid = 2.04E-01 mrem Other Organ = 7.50E-02 mrem In addition, an assessment of doses was made for members of the public due to their activities inside the site boundary. Parameters and assumptions used to make this determination can be found in Table 4. The results of the calculations can be found in Table 5. The maximally exposed member of the public was the lawn service provider, which was conservatively calculated to have performed all work at the Generation Support Building during 2005. It should be noted that liquid effluent pathway dose was not considered since these individuals would not engage in activities that would allow exposure to this pathway.

VII. METEOROLOGICAL DATA See Tables 6 and 7 for the cumulative joint frequency distributions and annual average data for continuous releases. The meterological recovery for 2005 was 94.1%.

VIII. RADIOACTIVE LIQUID EFFLUENT MONITORING INSTRUMENTATION OPERABILITY The minimum number of channels required to be OPERABLE as described in Table 3.3.11.2-1 of Technical Requirement 3.3.11.2 were, if inoperable at any time in the period January 1, 2005, through December 31, 2005, restored to operable status within the required time.

Reporting of these inoperable channels in this report is, therefore, not required.

IX. RADIOACTIVE GASEOUS EFFLUENT MONITORING INSTRUMENTATION OPERABILITY The minimum number of channels required to be OPERABLE as described in Table 3.3.11.3-1 of Technical Requirement 3.3.11.3 were, if inoperable at any time in the period January 1, 2005, through December 31, 2005, restored to operable status within the required time.

Reporting of inoperable channels is therefore not required in this report.

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River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 X. LIQUID HOLD UP TANKS The maximum quantity of radioactive material, excluding tritium and dissolved or entrained noble gases, contained in any unprotected outdoor tank during the period of January 1, 2005, through December 31, 2005 was less than or equal to the 10 curie limit as required by Technical Specification 5.5.8.b.

XI. RADIOLOGICAL ENVIRONMENTAL MONITORING There were two editorial changes during the reporting period January 1, 2005, through December 31, 2005. Table 4.1 of the ODCM, Direct Radiation, TQS1 and TEC changed street names:

  • Table 4.1, Direct Radiation, TQS1 - editorial - Change street name from Ferdinand to Commerce. (Comment PAR RSP-0008R1 2CM-1)
  • Table 4.1, Direct Radiation, TEC - editorial - Change street name from Midway to Greenbriar (Comment PAR RSP-0008R12CM the comment PAR had Briefield as the new street, which was incorrect. The street should be Greenbriar)

XII. LAND USE CENSUS There was no Land Use Census, as required by Technical Requirement 3.12.2, performed in 2005. The next Land Use Census will be performed in 2006.

XIII. OFFSITE DOSE CALCULATION MANUAL (ODCM)

The changes to the ODCM are summarized below. Attachment 1 contains the ODCM along with change bars in the margin except were deletions of data occurred.

  • Added new references 2.14 & 2.15. Step 4.1 - changed the title to match the current company title
  • Steps 4.1, 4.5, 4.6 and 4.7 have been reworded to reflect the current responsibilities
  • Step 5.3 changed to the latest RP department title
  • Step 7.2.2.1 typo - changed the explanation concerning FL being less than 1.0 to read "As long as FL is less than 1.0, the concentration of the tank is within compliance with TLCO 3.11.1.1 limits. It did say "FL is less than 10.
  • Step 7.3.3, added a step to describe what to do if there is no gamma activity in a liquid batch release and modified Attachment 2 to show the isotopes used for the default gamma factor.

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River Bend Station 2005 Regulatory Guide 1.21 4/13/2006

  • Step 8.2, second paragraph - deleted "When a nuclide concentration is below the LLD for the analysis, it is not reported as being present in the sample." There is no change to sampling methodology, analysis or reporting criteria by deleting this paragraph.
  • Table 4.1, Direct Radiation, TQS 1 - editorial - Change street name from Ferdinand to Commerce. (Comment PAR RSP-0008R12CM-1)
  • Table 4.1, Direct Radiation, TEC - editorial - Change street name from Midway to Greenbriar (Comment PAR RSP-0008R12CM the comment PAR had Briefield as the new street, which was incorrect. The street should be Greenbriar)
  • Section 1.2 - editorial - Changed the 2nd sentence to infer that alternate calculation methods will be more accurate rather than more limiting.
  • Table 1-5, Ag-i 1im - Incorrect dose factors were found for an isotope that has not been seen at RBS nor likely to be seen in the gaseous effluents.
  • Table C-I (Attachment 4) - editorial - added column for Li+i . IMi to aid in calculations.
  • Attachment 9 added reference for recalculating chi/q and d/q
  • The Reference section was renumbered to match plant numbering criteria.
  • The underlines in the table of contents were removed.
  • Formula 8.3.2.2 Corrected typographical in Li + I.lMi definition from Attachment 3 to Attachment 4.

XIV. MAJOR CHANGES TO RADIOACTIVE LIQUID, GASEOUS, AND SOLID WASTE TREATMENT SYSTEMS Engineering has performed a review of the IDEAS database to evaluate design changes completed or partially completed during 2005 involving the subject systems. These design changes were then reviewed to determine if there have been any major changes to the subject systems. The review was based on a major change being defined as a modification which affected the method of processing or the effluent from the system. Also, to be a "major change" the change must have affected the USAR.

The Engineering Requests completed during this time period primarily consisted of administrative changes. These administrative changes primarily consisted of drawing/document corrections and addition of vendor documents into the site document system to facilitate maintenance. These changes did not modify any radioactive waste system major component such that the processing method or effluent was changed. These changes also had no affect on the method of processing solid, liquid or gaseous waste and did not affect the isotopic composition or the quantity of liquid, solid, or gaseous waste as described in the USAR.

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River Bend Station 2005 Regulatory Guide 1.21 411312006 In conclusion, no design changes were completed during the specified time period that constituted a major change to liquid, solid or gaseous radwaste treatment systems.

XV. PROCESS CONTROL PROGRAM (PCP)

There were no changes to the PCP implemented in 2005 (Nuclear Management Manual/ENS/RW-105, Process Control Program).

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River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 EFFLUENT AND WASTE DISPOSAL REPORT TABLE 1A GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES REPORT FOR 2005 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases

1. Total Release Ci 2. 92E+00 9.09E+01 1. 08E+01 2.68E+01 1.31E+02
2. Avg. Release Rate uCi/sec 3.76E-01 1.16E+01 1.36E+00 3. 37E+00
3. % Applicable Limit  % (1) 1.78E-02 2.53E-01 2.98E-02 2.05E-01 2.53E-01 4.16E+01 Iodine-131
1. Total Release Ci 1.17E-04 1.28E-04 1. llE-04 3. 13E-03 3.49E-03
2. Avg. Release Rate uCi/sec 1.50E-05 1.63E-05 1.40E-05 3.94E-04
3. % Applicable Limit 4.95E-02 5.45E-02 4.75E-02 1.35E+00 7.48E-01 Particulates Half Life >= 8 dayE
1. Total Release Ci 3.33E-05 1.30E-05 3.01E-05 8.04E-04 8.80E-04
2. Avg. Release Rate uCi/sec 4.28E-06 1.66E-06 3.79E-06 1.01E-04
3. % Applicable Limit 8.26E-03 8.14E-03 1. 12E-02 2.09E-01 1.21E-01 Tritium
1. Total Release Ci 5.27E+00 9. 71E+00 8.44E+00 7.74E+00 3. 11E+01
2. Avg. Release Rate uCi/sec 6.77E-01 1.23E+00 1. 06E+00 9.73E-01
3. % Applicable Limit 6. 77E+00 1.23E+01 1. 06E+01 9.73E+00 3.38E-01
1. Either the gamma air dose limit of 5 mrads/qtr or beta air dose limit of 10 mrads/qtr (T.R. 3.11.2.2.a), which ever is most limiting.
2. The % of applicable limit is determined by comparing the dose contribution to the critical organ limits of TRM 3.11.2.3 15

River Bend Station 2005 Regulatory Guide 1.21 4/1312006 EFFLUENT AND WASTE DISPOSAL REPORT TABLE 1B GASEOUS EFFLUENTS - GROUND RELEASES - CONTINUOUS MODE REPORT FOR 2005 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases XE-133 Ci 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 XE-133M Ci 0.OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 XE-135 Ci 2. 71E-02 6. 53E-03 7.64E-02 3.76E-01 4. 86E-01 XE-135M Ci 3.71E-02 8. 93E-03 1. 04E-01 4.74E-01 6.25E-01 Totals for Period... Ci 6.42E-02 1.55E-02 1.81E-01 8.50E-01 1. l1E+00 Iodines I-131 Ci 0. OOE+00 0.OOE+00 0. OOE+00 1.52E-05 1.52E-05 I-133 Ci 0. OOE+00 0.OOE+00 0. OOE+00 6.78E-05 6.78E-05 Totals for Period... Ci 0. OOE+00 0. OOE+00 0.00OE+00 8.31E-05 8.31E-05 Particulates Half Life >= 8 days CE-141 Ci 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 CO-57 Ci 0. OOE+00 0. OOE+00 0.OOE+00 0. OOE+00 0. OOE+00 CO-58 Ci 0. OOE+00 0. OOE+00 0.OOE+00 0. OOE+00 0.00E+00 CO-60 Ci 0. OOE+00 0.00E+00 0. OOE+00 0. OOE+00 0. OOE+00 CR-51 Ci 1.78E-05 0. OOE+00 0. OOE+00 0. OOE+00 1.78E-05 CS-137 Ci 0.OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 FE-59 Ci 0.OOE+00 0. OOE+00 0. OOE+00 0.OOE+00 0.OOE+00 MN-54 Ci 1.16E-06 1. 92E-06 0.OOE+00 0. OOE+00 3.08E-06 NB-95 Ci 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 ZN-65 Ci 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 o.OOE+00 Totals for Period... Ci 1. 90E-05 1. 92E-06 0.00OE+00 0. OOE+00 2. 09E-05 Tritium H-3 Ci 2.34E+00 2.16E+00 1.88E+00 1.95E+00 8.33E+00 Totals for Period... Ci 2.34E+00 2.16E+00 1.88E+00 1.95E+00 8.33E+00 16

River Bend Station 2005 Regulatory Guide 1.21 4/1312006 EFFLUENT AND WASTE DISPOSAL REPORT TABLE 1C GASEOUS EFFLUENTS - GROUND RELEASES - BATCH MODE REPORT FOR 2005 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases XE-133 Ci 0. OOE+O0 0. OOE+O0 O.OOE+00 O.OOE+O0 O.OOE+00 XE-135 Ci O.OOE+00 0. OOE+00 0. OOE+00 0. OOE+O0 0. OOE+00 XE-135M Ci 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0.______ 0.______ 0.______ 0.______ 0.______

Totals for Period... Ci O. OOE+OO O.OOE+OO O. OOE+OO O. OOE+OO O. OOE+OO Iodines

    • No Nuclide Activities **

Particulates Half Life >= 8 days CO-60 Ci O.OOE+00 0. OOE+00 O.OOE+00 0. OOE+00 O.OOE+00 MN-54 Ci O.OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+0O ZN-65 Ci O.OOE+00 0. OOE+00 0. OOE+00 O.OOE+00 0. OOE+00 Totals for Period ... Ci O.OOE+00 0. OOE+0O 0. OOE+00 0. OOE+0O 0. OOE+00 Tritium

    • No Nuclide Activities **

17

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 EFFLUENT AND WASTE DISPOSAL REPORT TABLE 1D GASEOUS EFFLUENTS - MIXED MODE RELEASES - CONTINUOUS MODE REPORT FOR 2005 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases AR-41 Ci 0.OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 KR-85 Ci 0.OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 KR-85M Ci 0. OOE+00 0. OOE+00 4.22E-02 2.26E-01 2.68E-01 KR-87 Ci 0. OOE+00 0. 00E+00 8.36E-02 0. OOE+00 8.36E-02 KR-88 Ci 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. 00E+00 XE-131M Ci 0. OOE+00 0 . OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 XE-133 Ci 1.47E-01 4.81E+01 8.17E+00 0. OOE+00 5.64E+01 XE-133M Ci 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 XE-135 Ci 2. 04E+00 2. 81E+01 2.30E+00 1.28E+01 4.53E+01 XE-135M Ci 6. 65E-01 1.46E+01 0. OOE+00 1.29E+01 2.82E+01 XE-137 Ci 0.OOE+00 0. OOE+00 0. OOE+00 0.OOE+00 0. OOE+00 XE-138 Ci 0. OOE+00 0. OOE+00 0. 00E+00 0. OOE+00 0. OOE+00 Totals for Period... Ci 2. 86E+00 9.09E+01 1.06E+01 2.59E+01 1.30E+02 Iodines I-131 Ci 1. 17E-04 1.28E-04 1. 11E-04 3. 12E-03 3.47E-03 I-132 Ci 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0.OOE+00 I-133 Ci 7. 05E-04 7.04E-04 9.58E-04 1.75E-02 1. 99E-02 I-135 Ci 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 Totals for Period... Ci 8.21E-04 8.32E-04 1.07E-03 2.06E-02 2.33E-02 Particulates Half Life >= 8 days BA-140 Ci 0.OOE+00 0.OOE+00 0.OOE+00 3.48E-04 3.48E-04 CE-139 Ci O.OOE+00 0.OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 CO-58 Ci 0.OOE+00 0.OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 CO-60 Ci 0.OOE+00 0.OOE+00 0. OOE+00 0.OOE+00 0. OOE+00 CR-51 Ci 0.OOE+00 O.OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 CS-134 Ci O.OOE+00 O.OOE+O0 0. OOE+00 0. OOE+00 0.OOE+00 CS-137 Ci O.OOE+00 0.OOE+00 0.OOE+00 0. OOE+00 0. OOE+00 FE-59 Ci 0.OOE+00 0.OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 MN-54 Ci O.OOE+00 1.11E-05 4.92E-06 0. OOE+00 1.60E-05 SR-89 Ci 1.43E-05 0.OOE+00 2.52E-05 4.53E-04 4.93E-04 SR-90 Ci O.OOE+00 0.OOE+00 0.OOE+00 2.90E-06 2.90E-06 ZN-65 Ci O.OOE+00 O.OOE+00 0. OOE+00 0. OOE+00 0.OOE+00 Totals for Period... Ci 1.43E-05 l.llE-05 3. 01E-05 8.04E-04 8.59E-04 Tritium H-3 Ci 2.93E+00 7.54E+00 6.56E+00 5.79E+00 2.28E+01 18

River Bend Station 2005 Regulatory Guide 1.21 4113/2006 EFFLUENT AND WASTE DISPOSAL REPORT SUPPLEMENTAL INFORMATION GASEOUS EFFLUENTS - BATCH MODE Table 1E REPORT FOR 2005 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Number of releases 0 0 0 0 0 Total release time minutes O.OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 Maximum release time minutes 0.OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 0. OOE+00 Average release time minutes 0.OOE+00 0. OOE+O0 0. OOE+00 0. OOE+00 Minimum release time minutes O.OOE+00 0. OOE+00 0. OOE+00 0.00E+00 0.OOE+00 19

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 TABLE IF Effluent and Waste Disposal Annual Report 2005 Year RADIOACTIVE GASEOUS WASTE SAMPLING AND ANALYSIS PROGRAM Gaseous Release Type Sampling Minimum Analysis Type of Activity Lower Limit of Frequency Frequency Analysis Detection (LLD) uCi/ml A. Main Plant M M Principal Gamma Exhaust Duct Grab Sample Emitters l.OOE-04 H-3 I.OOE-06 B. Fuel Building M M Principal Gamma Ventilation Grab Sample Emitters 11.OOE-04 Exhaust Duct H-3 l.OOE-06 C. Radwaste M M Principal Gamma Building Grab Sample Emitters I.OOE-04 Ventilation Exhaust Duct D. All Release Continuous W 1-131 l.OOE-12 Types as listed Charcoal Sample inA,B,&C above I-133 l.OOE-10 Continuous W Principal Gamma Particulate Sample Emitters (1-131, 1.OOE-l I Others)

Continuous M Gross Alpha Composite l.OOE-l1 L_ Particulate Sample Continuous Q Sr-89, Sr-90 Composite l.OOE-l l Particulate Sample Continuous Noble Gas Monitor Noble Gases Gross Beta or Gamma 11.OOE-06 W = At least once per 7 days M = At least once per 31 days Q = At least once per 92 days 20

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 Table 1G GASEOUS DOSE

SUMMARY

Release ID: 1 All Gas Release Points Coefficient Type: Historical I&P DOSE LIMIT ANALYSIS-Age Dose Limit Max % of Period-Limit Group Organ (mrem) (mrem) Limit Q1 - T.Spec Any Organ CHILD THYROID 1.72E-02 7.50E+00 2.30E-01 Q2 - T.Spec Any Organ CHILD THYROID 1.85E-02 7.50E+00 2.47E-01 Q3 - T.Spec Any Organ CHILD THYROID 1.64E-02 7.50E+00 2.18E-01 Q4 - T.Spec Any Organ CHILD THYROID 1.29E-01 7.50E+00 1.72E+00 Yr - T.Spec Any Organ CHILD THYROID 1.81E-01 1.50E+01 1.21E+00 NOBLE GAS DOSE LIMIT ANALYSIS ==-

Dose Limit  % of Period-Limit (mrad) (mrad) Limit Q1 - T.Spec Gamma 8.88E-04 5.OOE+00 1.78E-02 Q2 - T.Spec Gamma 1.27E-02 5.OOE+00 2.53E-01 Q3 - T.Spec Gamma 1.49E-03 5.OOE+00 2.98E-02 Q4 - T.Spec Gamma 1.02E-02 5.OOE+00 2.05E-01 Yr - T.Spec Gamma 2.53E-02 1.OOE+01 2.53E-01 Q1 - T.Spec Beta 7.21E-04 1.OOE+01 7.21E-03 Q2 - T.Spec Beta 1.37E-02 1.00E+01 1.37E-01 Q3 - T.Spec Beta 1.95E-03 1.00E+01 1.95E-02 Q4 - T.Spec Beta 6.05E-03 1.OOE+01 6.05E-02 Yr - T.Spec Beta 2.24E-02 2.OOE+01 1.12E-01 21

River Bend Station 2005 Regulatory Guide 1.21 411312006 EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2A LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES REPORT FOR 2005 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases

1. Total Release Ci 0. OOE+00 4.72E-02 3.95E-02 1.85E-02 1. OSE-01
2. Avg. Diluted Conc. uCi/ml 0. OOE+00 3.40E-08 2.64E-08 1.31E-08 1.87E-08
3. % Applicable Limit  % (1) 0. OOE+00 3.31E-02 2.55E-01 7.04E-03 1. 65E-01 Tritium
1. Total Release Ci 0. OOE+00 4.22E+01 5.80E+01 1. 68E+01 1. 17E+02
2. Avg. Diluted Conc. uCi/ml 0. OOE+00 3.04E-05 3.87E-05 1. 19E-05 2. 08E-05
3. % Applicable Limit 0. OOE+00 8.38E-04 1.76E-03 1.49E-04 1.78E-03 Dissolved and Entrained Gases
1. Total Release Ci 0. OOE+00 2.53E-03 2.07E-03 5.26E-03 9. 87E-03
2. Avg. Diluted Conc. uCi/ml 0. OOE+00 1.83E-09 1.38E-09 3.72E-09 1.75E-09
3. % Applicable Limit % (2) 0. OOE+00 9. lOE-04 6. 90E-04 1.85E-03 8.77E-04 Gross Alpha Radioactivity
1. Total Release Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 Volume of liquid waste liters 0.OOE+00 1.83E+06 3.08E+06 8.40E+05 5.75E+06 Volume of dil. water liters 1.32E+09 1.39E+09 1.50E+09 1.42E+09 5.62E+09 (1) The most limiting dose compared to the total body and critical organ limits of TRM 3.11.1.2.a.

(2) Technical Requirement 3.11.1.1 limit of 2.OOE-04 uCi/ml for dissolved and entrained noble gases in liquid effluent.

22

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2B LIQUID EFFLUENTS - CONTINUOUS MODE REPORT FOR 2005 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Products

    • No Nuclide Activities ** ........ ........ ........ ........ ........

Tritium

    • No Nuclide Activities **........ ........ ........ ......... ........

Dissolved and Entrained Gases

    • No Nuclide Activities ** ........ ........ ........ ........ ........

Gross Alpha Radioactivity

    • No Nuclide Activities ** ........ ........ ........ ........ ........

23

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 EFFLUENT AND WASTE DISPOSAL REPORT TABLE 2C LIQUID EFFLUENTS - BATCH MODE REPORT FOR 2005 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Fission and Activation Gases CO-58 Ci 0.OOE+00 3.80E-05 1.89E-04 5.95E-06 2.33E-04 CO-60 Ci 0.OOE+00 2.10E-03 1.15E-02 1.31E-03 1.49E-02 CR-51 Ci 0.OOE+00 0.OOE+00 2.18E-04 0.OOE+00 2.18E-04 FE-55 Ci 0.OOE+00 4.27E-02 1.61E-02 1.61E-02 7.50E-02 FE-59 Ci 0.OOE+00 0.OOE+00 5.07E-04 1.63E-05 5.23E-04 I-131 Ci 0.OOE+00 0.OOE+00 0.OOE+00 9.97E-06 9.97E-06 LA-140 Ci 0.OOE+00 0.OOE+00 9.63E-06 6.80E-05 7.76E-05 MN-54 Ci 0.OOE+00 1.97E-03 1.04E-02 9.41E-04 1.33E-02 MO-99 Ci 0.OOE+00 0.OOE+00 0.OOE+00 3.49E-06 3.49E-06 RU-106 Ci 0.OOE+00 4.29E-05 0.OOE+00 0.OOE+00 4.29E-05 SB-124 Ci 0.OOE+00 0.OOE+00 2.63E-05 0.OOE+00 2.63E-05 SN-113 Ci 0.OOE+00 0.OOE+00 2.23E-05 0.OOE+00 2.23E-05 SR-89 Ci 0.OOE+00 2.37E-04 0.OOE+00 0.OOE+00 2.37E-04 TC-99M Ci 0.OOE+00 0.OOE+00 0.OOE+00 3.74E-06 3.74E-06 Y-92 Ci 0.OOE+00 3.15E-05 0.OOE+00 0.OOE+00 3.15E-05 ZN-65 Ci 0.OOE+00 0.OOE+00 5.58E-04 0.OOE+00 5.58E-04 Totals for Period... Ci 0.OOE+00 4.72E-02 3.95E-02 1.85E-02 1.05E-01 Tritium H-3 Ci 0.OOE+00 4.22E+01 5.80E+01 1.68E+01 1.17E+02 Totals for Period... Ci 0.OOE+00 4.22E+01 5.80E+01 1.68E+01 1.17E+02 Dissolved and Entrained Gases XE-133 Ci 0. OOE+00 2.03E-03 9.40E-04 2.76E-03 5.73E-03 XE-133M Ci 0. OOE+00 0. OOE+00 0. OOE+00 6.55E-05 6.55E-05 XE-135 Ci 0. OOE+00 4.99E-04 1.13E-03 2.44E-03 4. 08E-03 Totals for Period... Ci 0.OOE+00 2.53E-03 2.07E-03 5.26E-03 9.87E-03 Gross Alpha Radioactivity

    • No Nuclide Activities **

24

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 EFFLUENT AND WASTE DISPOSAL REPORT SUPPLEMENTAL INFORMATION LIQUID EFFLUENTS - BATCH MODE Table 2D REPORT FOR 2005 Units QTR 1 QTR 2 QTR 3 QTR 4 YEAR Number of releases 0 33 55 15 103 Total release time minutes 0.OOE+00 1.20E+04 1.98E+04 5.49E+03 3 .73E+04 Maximum release time minutes 0.OOE+00 4.37E+02 4.27E+02 3.87E+02 4. 37E+02 Average release time minutes 0.OOE+00 3. 64E+02 3.6OE+02 3.66E+02 3. 62E+02 Minimum release time minutes 0.OOE+00 3.24E+02 2. 60E+02 3.51E+02 2. 60E+02 OTR 1 OTR 2 OTR 3 OTR 4 Average Miss. River stream flow during periods of release 3

of effluent into a ft /sec 8.35E+05 4.86E+05 2.39E+05 2.03E+05 flowing stream 25

River Bend Station 2005 Regulatory Guide 1.21 411312006 TABLE 2E Effluent and Waste Disposal Annual Report 2005 Year RADIOACTIVE LIQUID WASTE SAMPLING AND ANALYSIS PROGRAM Liquid Release Type Sampling Minimum Analysis Type of Activity Lower Limit of Frequency Frequency Analysis Detection (LLD) uCi/mr A. Batch Waste P P Principal Gamma 5.OOE-07 Release (Liquid Each Batch Each Batch Emitters: except Radwaste for Ce-144 5.OOE-06 Recovery Sample Tanks) 1-131 1.OOE-06 P M Dissolved and One Batch/M Entrained Gases 1.00E-05 (Gamma Emitters)

P M H-3 1.00E-05 Each Batch Composite Gross Alpha 1.00E-07 P Q Sr-89, Sr-90 5.OOE-08 Each Batch Composite Fe-55 1.00E-06 P = Prior to each radioactive release M = At least once per 31 days Q = At least once per 92 days 26

2005 Regulatory Guide 1.21 4113/2006 River Bend Station Table 2F LIQUID DOSE

SUMMARY

Report for: 2005 Release ID: 10 All Liquid Release Points Liquid Receptor

=== SITE DOSE LIMIT ANALYSIS Age Dose Limit Max % of Group Organ (mrem) (mrem) Limit Period - Limit Qtr 1 - T.Spec Any Organ 0.OOE+00 1.50E+00 0. OOE+00 Qtr 2 - T.Spec Any Organ ADULT GILLI 1.67E-03 5. OOE+00 3.34E-02 Qtr 3 - T.Spec Any Organ ADULT GILLI 1.28E-02 5.00E+00 2.55E-01 Qtr 4 - T.Spec Any Organ ADULT GILLI 3.54E-04 5.00E+00 7. 09E-03 2005 - T.Spec Any Organ ADULT GILLI 8.28E-03 1. OOE+01 8.28E-02

- T.Spec Total Body ADULT TBODY 0.OOE+00 1.50E+00 0. OOE+00 Qtr 1 Qtr 2 - T.Spec Total Body ADULT TBODY 1.52E-04 1.50E+00 1.01E-02 Qtr 3 - T.Spec Total Body ADULT TBODY 9. 12E-04 1.50E+00 6.08E-02 Qtr 4 - T.Spec Total Body ADULT TBODY 3 .03E-05 1.50E+00 2.02E-03 2005 - T.Spec Total Body ADULT TBODY 6.26E-04 3. OOE+00 2.09E-02 27

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 TABLE 3 Effluent and Waste Disposal Annual Report 2005 Year Solid Waste and Irradiated Fuel Shipments Reporting Period from 01/01/05 to 12/31/05 A. Solid Waste Shipped for Burial or Disposal (Not Irradiated Fuel)

1. Type of Waste Units 12 Month Period Waste Class Estimated Error %

Spent Resins, Filter m3 l.19E+02 A See Below Sludges, Evaporator Ci 3.80E+02 A Bottoms, Etc. m3 6.81E+00 B Ci 1.88E+03 B m3 0.OOE+00 C Ci 0.OOE+00 C Dry Compressible Wastes, m3 4.08E+02 A See Below Contaminated Equipment Ci 2.16E+01 A Etc.

Irradiated Components, m3 0.00E+00 N/A N/A Control Rods, Etc. Ci 0.OOE+00 Other m3 4.12E+01 N/A See Below (Water, EHC, Waste Oil) Ci 7.67E+00 Note: Volume considered being the total disposal volume of the container.

Radwaste Estimated Error %:

Waste types considered are processed solid waste (i.e. resin, filter media) and non-compactible/compactible dry active waste.

1. Possible Errors
a. Volume
b. Representative Sampling
c. Instrument/Counting
d. Dose to Curie Calculations
2. Volume Error Level indication for processed resins can be determined to +/- 0.5 inches. This correlates to approximately 1.0%.

Container manufacturer stated design tolerance allows for 1.0% deviation from container dimensions. Volume error is not applicable to dry active waste.

3. Representative Sampling Error Sampling error for processed resins is based upon obtaining a representative sample from the waste being processed using an iso-lock sampler. Sampling error from dry active waste is based upon obtaining a representative sample from the material being packaged. This error is estimated to be +/- 10% for all waste types, which is consistent with industry standards.

28

River Bend Station 2005 Regulatory Guide 1.21 4/1312006 Effluent and Waste Disposal Annual Report 2005 Year Solid Waste and Irradiated Fuel Shipments Reporting Period from 01/01/05 to 12/31/05 Table 3 (continued)

4. Instrument/Counting Error The error caused by sample geometry, counting time, sample activity and instrument background is estimated to be

+/- 10%. The error for radiological survey instrumentation is estimated to be +/- 20%. This error is applicable to all waste types.

5. Dose to Curie Calculations Error The Dose to Curie method used to calculate activity suffers from analytical accuracy in that certain important parameters are neglected. These parameters are geometry of package, measuring instrument characteristics, build-up, internal attenuation effect, and external media attenuation. An activity correction factor is applied to provide adjustment for these factors. This error is applicable to all waste types.
2. Estimates of Major Nuclides by Waste Stream Resins, Filters and Evaporator Dry Compressible Wastes, Bottoms, Etc. Contaminated Equipment, Etc. Other (Min 1 %) I(Min 1%)

Isotope  % Abundance Curies Isotope %Abundance Curies Water, EHC, Waste Oil, Etc.

(Min 1%)

Isotope % Abundance Curies Mn-54 5.828 1.32E+02 Mn-54 6.628 1.43E+00 Mn-54 3.474 2.66E-Ol Fe-55 71.790 1.63E+03 Fe-55 83.999 1.81E+01 Fe-55 85.359 6.54E+00 Co-60 15.133 3.43E+02 Co-60 7.980 1.72E+00 Co-60 10.570 8.1OE-0I Zn-65 5.084 1.15E+02 Determined by Measurement & Correlation.

Packaged in Strong, Tight Liners.

No Solidification Agent or Absorbent Used.

No Irradiated Components, Control Rods, Etc. were shipped in 2005.

3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 16 Truck Studsvik Processing Facility - Erwin, TN.

7 Truck Envirocare of Utah - Clive, UT 7 Truck Duratek - Oak Ridge, TN.

5 Truck RACE - Memphis, TN.

B. No Irradiated Components, Control Rods, Etc. were shipped in 2005.

Irradiated Fuel Shipments Disposition Number of Shipments Mode of Transportation Destination 0 N/A N/A 29

River Bend Station 2005 Regulatory Guide 1.21 4/1312006 TABLE 4 Effluent and Waste Disposal Annual Report 2005 Year ASSUMPTIONS/PARAMETERS FOR DOSES TO A MEMBER OF THE PUBLIC INSIDE SITE BOUNDARY MEMBER OF I THE PUBLIC People Entering Site Without Consent Lawn Service Provider National Guard I

(1) The approximate distances from main plant vent exhaust to location.

(2) Liquid pathways dose is not considered due to the nature of activities that individuals are engaged in.

(3) National Guard/State Police are being evaluated, if applicable, for dose while stationed on site as members of the public. The adult age group is the only age group considered in this category.

30

River Bend Station 2005 Regulatory Guide 1.21 4/1312006 TABLE 5 DOSES TO MEMBERS OF THE PUBLIC ON SITE FROM GASEOUS RELEASES 2005 Dose calc Critical Total Skin Dose Annual based on Orean Body Dose Annual Duration Durations Dose Annual (mrem) Factor Annual (mrem)

(mrem)

Alligator 8.40E-05 1.02E-04 9.68E-05 4.57E-03 B ayou_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Lawn Service 9.62E-02 1.60E-01 1.51E-01 4.1 lE-02 Provider Guard O.OOE+00 O.OOE+00 O.OOE+00 5.48E-02 (1) The National Guard/State Police were not onsite during 2005.

31

River Bend Station 2005 Regulatory Guide 1.21 4113/2006 Table 6 Effluent and Waste Disposal Annual Report 2005 Year Meteorological Data - Joint Frequency Tables 32

River Bend Station 2005 Regulatory Guide 1.21 4113/2006 RIVER BEND STATION JOINT FREQUENCY TABLE ALL STABILITY CLASSES FROM 1/ 1/05 0:00 TO 3/31/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 7 8 4 17 36 86 63 1 0 0 0 0 222 NNE 4 6 6 26 66 80 13 0 0 0 0 0 201 NE 6 17 5 22 36 72 6 0 0 0 0 0 164 ENE 6 19 21 28 35 31 8 0 0 0 0 0 148 E 12 9 22 17 22 3 0 0 0 0 0 0 85 ESE 3 13 13 25 28 29 0 0 0 0 0 0 111 SE 0 5 10 50 75 74 7 0 0 0 0 0 221 SSE 0 4 2 6 20 30 32 3 0 0 0 0 97 S 1 0 4 12 20 52 29 3 0 0 0 0 121 SSW 0 3 5 13 32 46 26 1 0 0 0 0 126 SW 0 2 9 15 20 20 18 0 0 0 0 0 84 WSW 1 4 10 18 7 26 13 0 0 0 0 0 79 W 3 9 4 11 13 35 4 0 0 0 0 0 79 WNW 6 10 9 13 13 41 31 2 0 0 0 0 125 NW 2 14 1 5 5 36 20 1 0 0 0 0 84 NNW 2 7 4 4 17 59 45 0 0 0 0 0 138 TOTAL 53 130 129 282 445 720 315 11 0 0 0 0 2085 NUMBER OF CALMS: 4 NUMBER OF INVALID HOURS: 71 NUMBER OF VALID HOURS: 2089 TOTAL HOURS FOR THE PERIOD: 2160 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS A FROM 1/ 1/05 0:00 TO 3/31/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0.

N 0 0 0 0 0 0 7 0 0 0 0 0 7 NNE 0 0 0 0 0 7 7 0 0 0 0 0 14 NE 0 0 0 0 0 10 2 0 0 0 0 0 12 ENE 1 0 1 0 1 3 2 0 0 0 0 0 8 E 0 0 1 0 1 0 0 0 0 0 0 0 2 ESE 0 1 1 0 2 7 0 0 0 0 0 0 11 SE 0 1 0 2 1 8 1 0 0 0 0 0 13 SSE 0 0 0 0 0 1 1 0 0 0 0 0 2 S 0 0 0 0 0 0 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 0 0 0 0 0 0 W 0 0 0 0 1 0 0 0 0 0 0 0 1 WNW 0 0 0 0 0 1 0 0 0 0 0 0 1 NW 0 0 0 0 0 0 1 0 0 0 0 0 1 NNW 0 0 0 0 0 1 0 0 0 0 0 0 1 TOTAL 1 2 3 2 6 38 21 0 0 0 0 0 73 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 73 TOTAL HOURS FOR THE PERIOD: 73 33

River Bend Station 2005 Regulatory Guide 1.21 4/13/20 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS B FROM 1/ 1/05 0:00 TO 3/31/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N_____0____0____0_____0____1____0_____8____0____0_____0____0____0_____9_

N 0 0 0 0 1 0 8 0 0 0 0 0 9 NNE 0 0 0 0 1 5 2 0 0 0 0 0 8 NE 0 0 0 0 1 1 0 0 0 0 0 0 2 ENE 0 0 0 0 l 3 0 0 0 0 0 0 4 E 0 0 0 2 2 1 0 0 0 0 0 0 5 ESE 0 1 4 1 4 2 0 0 0 0 0 0 12 SE 0 0 0 2 2 8 0 0 0 0 0 0 12 SSE 0 0 0 0 1 2 6 0 0 0 0 0 9 S 0 0 0 0 0 0 3 0 0 0 0 0 3 SSW 0 0 0 1 1 1 0 0 0 0 0 0 3 SW 0 0 0 2 0 0 2 0 0 0 0 0 4 WSW 0 0 0 0 0 1 3 0 0 0 0 0 4 W 0 0 0 0 0 1 0 0 0 0 0 0 1 WNW 0 0 0 0 0 0 4 1 0 0 0 0 5 NW 0 0 0 0 1 1 1 1 0 0 0 0 4 NNW 0 0 0 0 0 4 8 0 0 0 0 0 12 TOTAL 0 1 4 8 15 30 37 2 0 0 0 0 97 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 97 TOTAL HOURS FOR THE PERIOD: 97 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS C FROM 1/ 1/05 0:00 TO 3/31/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N_____0____0____0_____1____0____2_____3____0____0_____0____0____0_____6_

N 0 0 0 1 0 2 3 0 0 0 0 0 6 NNE 0 0 0 0 2 3 0 0 0 0 0 0 7 NE 0 0 0 0 3 3 0 0 0 0 0 0 6 ENE 0 0 0 0 1 0 0 0 0 0 0 0 1 E 0 0 0 1 0 0 0 0 0 0 0 0 1 ESE 0 0 0 1 3 0 0 0 0 0 0 0 4 SE 0 0 0 0 1 2 1 0 0 0 0 0 4 SSE 0 0 0 0 0 2 1 0 0 0 0 0 3 S 0 0 0 0 0 2 2 0 0 0 0 0 4 SSW 0 0 0 0 0 0 2 0 0 0 0 0 2 SW 0 0 0 0 0 0 5 0 0 0 0 0 5 WSW 0 0 0 0 0 0 5 0 0 0 0 0 5 W 0 0 0 1 0 1 1 0 0 0 0 0 3 WNW 0 0 1 0 0 2 4 1 0 0 0 0 8 NW 0 0 0 2 0 7 1 0 0 0 0 0 10 NNW 0 0 0 0 0 4 5 0 0 0 0 0 9 TOTAL 0 0 1 6 10 30 30 1 0 0 0 0 78 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 78 TOTAL HOURS FOR THE PERIOD: 78 34

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS D FROM 1/ 1/05 0:00 TO 3/31/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 7 18 67 42 1 0 0 0 0 135 NNE 0 0 2 7 26 47 4 0 0 0 0 0 86 NE 0 0 0 4 11 30 4 0 0 0 0 0 49 ENE 0 1 0 5 10 13 3 0 0 0 0 0 32 E 1 0 2 7 12 1 0 0 0 0 0 0 23 ESE 0 0 3 10 13 8 0 0 0 0 0 0 34 SE 0 2 2 19 36 37 4 0 0 0 0 0 100 SSE 0 0 1 2 8 17 20 3 0 0 0 0 51 S 0 0 1 2 7 26 21 3 0 0 0 0 60 SSW 0 1 0 3 20 30 22 1 0 0 0 0 77 SW 0 0 0 10 13 19 11 0 0 0 0 0 53 WSW 0 1 2 11 6 25 5 0 0 0 0 0 50 W 0 0 1 5 11 32 3 0 0 0 0 0 52 WNW 0 1 3 6 9 36 23 0 0 0 0 0 78 NW 0 0 0 2 2 19 14 0 0 0 0 0 37 NNW 0 0 0 3 11 47 32 0 0 0 0 0 93 TOTAL 1 6 17 103 213 454 208 8 0 0 0 0 1010 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 1010 TOTAL HOURS FOR THE PERIOD: 1010 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS E FROM 1/ 1/05 0:00 TO 3/31/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 2 0 1 5 17 17 3 0 0 0 0 0 45 NNE 0 1 0 13 36 16 0 0 0 0 0 0 66 NE 0 2 1 14 19 28 0 0 0 0 0 0 64 ENE 0 1 5 14 16 12 3 0 0 0 0 0 51 E 1 1 7 6 7 1 0 0 0 0 0 0 23 ESE 0 3 3 10 6 12 0 0 0 0 0 0 34 SE 0 0 5 24 35 19 1 0 0 0 0 0 84 SSE 0 1 1 3 11 8 4 0 0 0 0 0 28 S 0 0 2 6 13 24 3 0 0 0 0 0 48 SSW 0 2 2 7 11 15 2 0 0 0 0 0 39 SW 0 0 6 1 7 1 0 0 0 0 0 0 15 WSW 0 1 4 6 1 0 0 0 0 0 0 0 12 W 1 1 1 5 1 1 0 0 0 0 0 0 10 WNW 1 0 1 3 4 1 0 0 0 0 0 0 10 NW 0 1 1 i0 2 9 3 0 0 0 0 0 16 NNW 1 0 0 1 6 3 0 0 0 0 0 0 11 TOTAL 6 14 40 118 192 167 19 0 0 0 0 0 556 NUMBER OF CALMS: 1 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 557 TOTAL HOURS FOR THE PERIOD: 557 35

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS F FROM 1/ 1/05 0:00 TO 3/31/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 1 2 3 4 0 0 0 0 0 0 0 0 10 NNE 1 0 1 5 1 0 0 0 0 0 0 0 8 NE 2 2 0 2 2 0 0 0 0 0 0 0 8 ENE 0 2 6 8 5 0 0 0 0 0 0 0 21 E 4 3 9 1 0 0 0 0 0 0 0 0 17 ESE 3 6 2 2 0 0 0 0 0 0 0 0 13 SE 0 2 2 3 0 0 0 0 0 0 0 0 7 SSE 0 1 0 1 0 0 0 0 0 0 0 0 2 S 0 0 0 4 0 0 0 0 0 0 0 0 4 SSW 0 0 3 2 0 0 0 0 0 0 0 0 5 SW 0 0 2 2 0 0 0 0 0 0 0 0 4 WSW 1 2 4 0 0 0 0 0 0 0 0 0 7 W 0 1 1 0 0 0 0 0 0 0 0 0 2 WNW 1 1 2 4 0 1 0 0 0 0 0 0 9 NW 1 4 0 1 0 0 0 0 0 0 0 0 6 NNW 1 0 1 0 0 0 0 0 0 0 0 0 2 TOTAL 15 26 36 39 8 1 0 0 0 0 0 0 125 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 125 TOTAL HOURS FOR THE PERIOD: 125 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS G FROM 1/ 1/05 0:00 TO 3/31/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 4 6 0 0 0 0 0 0 0 0 0 0 10 NNE 3 5 3 1 0 0 0 0 0 0 0 0 12 NE 4 13 4 2 0 0 0 0 0 0 0 0 23 ENE 5 15 9 1 1 0 0 0 0 0 0 0 31 E 6 5 3 0 0 0 0 0 0 0 0 0 14 ESE 0 2 0 1 0 0 0 0 0 0 0 0 3 SE 0 0 1 0 0 0 0 0 0 0 0 0 1 SSE 0 2 0 0 0 0 0 0 0 0 0 0 2 S 1 0 1 0 0 0 0 0 0 0 0 0 2 SSW 0 0 0 0 0 0 0 0 0 0 0 0 0 SW 0 2 1 0 0 0 0 0 0 0 0 0 3 WSW 0 0 0 1 0 0 0 0 0 0 0 0 1 W 2 7 1 0 0 0 0 0 0 0 0 0 10 WNW 4 8 2 0 0 0 0 0 0 0 0 0 14 NW 1 9 0 0 0 0 0 0 0 0 0 0 10 NNW 0 7 3 0 0 0 0 0 0 0 0 0 10

__________________________________________________________j______________

TOTAL 30 81 28 6 1 0 0 0 0 0 0 0 146 NUMBER OF CALMS: 3 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 149 TOTAL HOURS FOR THE PERIOD: 149 36

River Bend Statio 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE ALL STABILITY CLASSES FROM 1/ 1/05 0:00 TO 3/31/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 1 0 1 5 39 135 12 2 0 0 0 195 NNE 0 0 1 1 6 45 133 7 0 0 0 0 193 NE 0 0 2 2 5 19 118 22 0 0 0 0 168 ENE 1 0 0 5 7 29 66 31 1 0 0 0 140 E 0 0 1 2 4 24 37 4 0 0 0 0 72 ESE 0 2 0 7 7 28 121 47 1 0 0 0 213 SE 0 0 1 1 7 31 84 11 1 0 0 0 136 SSE 0 0 0 0 7 24 48 23 2 0 0 0 104 S 0 0 0 6 10 19 68 6 2 0 0 0 111 SSW 0 0 0 1 11 42 71 19 0 0 0 0 144 SW 0 0 0 6 7 36 46 11 0 0 0 0 106 WSW 1 0 2 3 5 34 42 3 0 0 0 0 90 W 0 0 0 7 16 30 44 4 0 0 0 0 101 WNW 0 0 0 4 9 23 57 22 4 0 0 0 119 NW 0 0 1 3 2 14 42 5 0 0 0 0 67 NNW 0 0 2 2 3 22 91 10 0 0 0 0 130 TOTAL 2 3 10 51 111 459 1203 237 13 0 0 0 2089 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 71 NUMBER OF VALID HOURS: 2089 TOTAL HOURS FOR THE PERIOD: 2160 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS A FROM 1/ 1/05 0:00 TO 3/31/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 0 0 0 4 3 0 0 0 0 7 NNE 0 0 0 0 0 0 10 3 0 0 0 0 13 NE 0 0 0 0 0 0 9 3 0 0 0 0 12 ENE 1 0 0 0 _1 1 4 2 0 0 0 0 9 E 0 0 0 0 1 1 2 0 0 0 0 0 4 ESE 0 1 0 0 2 0 14 0 0 0 0 0 17 SE 0 0 0 0 2 0 2 1 0 0 0 0 5 SSE 0 0 0 0 0 0 1 1 0 0 0 0 2 S 0 0 0 0 0 0 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 0 0 0 0 0 0 W 0 0 0 0 0 1 1 0 0 0 0 0 2 WNW 0 0 0 0 0 0 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 1 0 0 0 0 0 1 NNW 0 0 0 0 0 0 1 0 0 0 0 0 1 TOTAL 1 1 0 0 6 3 49 13 0 0 0 0 73 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 73 TOTAL HOURS FOR THE PERIOD: 73 37

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS B FROM 1/ 1/05 0:00 TO 3/31/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 0 1 0 7 1 0 0 0 0 9 NNE 0 0 0 0 0 2 4 0 0 0 0 0 6 NE 0 0 0 0 0 0 3 0 0 0 0 0 3 ENE 0 0 0 0 0 2 2 1 0 0 0 0 5 E 0 0 0 0 0 4 1 1 0 0 0 0 6 ESE 0 0 0 0 1 5 11 3 0 0 0 0 20 SE 0 0 0 0 0 0 3 0 0 0 0 0 3 SSE 0 0 0 0 0 1 5 2 0 0 0 0 8 S 0 0 0 0 0 0 2 1 0 0 0 0 3 SSW 0 0 0 0 1 2 1 0 0 0 0 0 4 SW 0 0 0 0 0 1 0 2 0 0 0 0 3 WSW 0 0 0 0 0 1 4 0 0 0 0 0 5 W 0 0 0 0 0 0 0 0 0 0 0 0 0 WNW 0 0 0 0 0 1 1 3 2 0 0 0 7 NW 0 0 0 0 0 1 0 2 0 0 0 0 3 NNW 0 0 0 0 0 0 9 3 0 0 0 0 12 TOTAL 0 0 0 0 3 20 53 19 2 0 0 0 97 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 97 TOTAL HOURS FOR THE PERIOD: 97 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS C FROM 1/ 1/05 0:00 TO 3/31/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 0 1 0 5 0 0 0 0 0 6 NNE 0 0 0 0 0 2 3 0 0 0 0 0 5 NE 0 0 0 0 1 1 3 1 0 0 0 0 6 ENE 0 0 0 0 0 1 2 0 0 0 0 0 3 E 0 0 0 0 1 0 1 0 0 0 0 0 2 ESE 0 0 0 0 0 1 3 0 0 0 0 0 4 SE 0 0 0 0 0 1 1 1 0 0 0 0 3 SSE 0 0 0 0 0 0 2 0 0 0 0 0 2 S 0 0 0 0 0 0 5 0 0 0 0 0 5 SSW 0 0 0 0 0 0 2 0 0 0 0 0 2 SW 0 0 0 0 0 0 2 2 0 0 0 0 4 WSW 0 0 0 0 0 0 4 2 0 0 0 0 6 W 0 0 0 0 0 1 2 0 0 0 0 0 3 WNW 0 0 0 0 0 1 4 0 2 0 0 0 7 NW 0 0 0 0 0 3 6 0 0 0 0 0 9 NNW 0 0 1 0 0 1 9 0 0 0 0 0 11 TOTAL 0 0 1 0 3 12 54 6 2 0 0 0 78 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 78 TOTAL HOURS FOR THE PERIOD: 78 38

River Bend Staton 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS D FROM 1/ 1/05 0:00 TO 3/31/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 0 2 28 86 7 2 0 0 0 125 NNE 0 0 0 1 6 23 54 4 0 0 0 0 88 NE 0 0 1 1 1 5 36 12 0 0 0 0 56 ENE 0 0 0 1 1 9 20 11 0 0 0 0 42 E 0 0 0 1 2 2 14 1 0 0 0 0 20 ESE 0 1 0 2 2 10 43 20 0 0 0 0 78 SE 0 0 1 0 2 12 33 7 1 0 0 0 56 SSE 0 0 0 0 4 7 20 16 2 0 0 0 49 S 0 0 0 3 2 13 28 5 2 0 0 0 53 SSW 0 0 0 0 4 20 37 18 0 0 0 0 79 SW 0 0 0 4 1 18 22 6 0 0 0 0 51 WSW 0 0 1 3 4 15 29 1 0 0 0 0 53 W 0 0 0 3 11 15 33 4 0 0 0 0 66 WNW 0 0 0 3 4 12 36 17 0 0 0 0 72 NW 0 0 0 1 1 7 23 1 0 0 0 0 33 NNW 0 0 0 1 2 16 63 7 0 0 0 0 89 TOTAL 0 1 3 24 49 212 577 137 7 0 0 0 1010 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 1010 TOTAL HOURS FOR THE PERIOD: 1010 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS E FROM 1/ 1/05 0:00 TO 3/31/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 1 0 0 0 4 33 1 0 0 0 0 39 NNE 0 0 0 0 0 14 56 0 0 0 0 0 70 NE 0 0 0 1 1 3 47 5 0 0 0 0 57 ENE 0 0 0 0 1 9 31 15 1 0 0 0 57 E 0 0 0 1 0 10 10 2 0 0 0 0 23 ESE 0 0 0 2 1 4 38 24 1 0 0 0 70 SE 0 0 0 0 3 6 34 2 0 0 0 0 45 SSE 0 0 0 0 0 7 19 4 0 0 0 0 30 S 0 0 0 1 4 4 32 0 0 0 0 0 41 SSW 0 0 0 1 2 11 26 1 0 0 0 0 41 SW 0 0 0 2 4 4 16 1 0 0 0 0 27 WSW 0 0 0 0 0 8 3 0 0 0 0 0 11 W 0 0 0 1 2 3 2 0 0 0 0 0 8 WNW 0 0 0 0 2 3 8 1 0 0 0 0 14 NW 0 0 1 0 0 1 9 2 0 0 0 0 13 NNW 0 0 1 0 1 2 7 0 0 0 0 0 11 TOTAL 0 1 2 9 21 93 371 58 2 0 0 0 557 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 557 TOTAL HOURS FOR THE PERIOD: 557 39

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS F FROM 1/ 1/05 0:00 TO 3/31/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N_____0____0____0_____0____0____2_____0____0____0_____0____0____0_____2_

N 0 0 0 0 0 2 0 0 0 0 0 0 2 NNE 0 0 0 0 0 2 4 0 0 0 0 0 6 NE 0 0 0 0 1 4 10 1 0 0 0 0 16 ENE 0 0 0 0 3 3 5 2 0 0 0 0 13 E 0 0 0 0 0 3 8 0 0 0 0 0 11 ESE 0 0 0 2 1 5 10 0 0 0 0 0 18 SE 0 0 0 1 0 4 6 0 0 0 0 0 11 SSE 0 0 0 0 1 6 0 0 0 0 0 0 7 S 0 0 0 1 1 1 0 0 0 0 0 0 3 SSW 0 0 0 0 0 2 5 0 0 0 0 0 7 SW 0 0 0 0 .0 6 4 0 0 0 0 0 10 WSW 0 0 1 0 0 5 1 0 0 0 0 0 7 W 0 0 0 1 0 1 2 0 0 0 0 0 4 WNW 0 0 0 0 1 0 3 1 0 0 0 0 5 NW 0 0 0 1 0 0 2 0 0 0 0 0 3 NNW 0 0 0 1 0 0 1 0 0 0 0 0 2 TOTAL 0 0 1 7 8 44 61 4 0 0 0 0 125 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 125 TOTAL HOURS FOR THE PERIOD: 125 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS G FROM 1/ 1/05 0:00 TO 3/31/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 1 1 5 0 0 0 0 0 0 7 NNE 0 0 1 0 0 2 2 0 0 0 0 0 5 NE 0 0 1 0 1 6 10 0 0 0 0 0 18 ENE 0 0 0 4 1 4 2 0 0 0 0 0 11 E 0 0 1 0 0 4 1 0 0 0 0 0 6 ESE 0 0 0 1 0 3 2 0 0 0 0 0 6 SE 0 0 0 0 0 8 5 0 0 0 0 0 13 SSE 0 0 0 0 2 3 1 0 0 0 0 0 6 S 0 0 0 1 3 1 1 0 0 0 0 0 6 SSW 0 0 0 0 4 7 0 0 0 0 0 0 11 SW 0 0 0 0 2 7 2 0 0 0 0 0 11 WSW 1 0 0 0 1 5 1 0 0 0 0 0 8 W 0 0 0 2 3 9 4 0 0 0 0 0 18 WNW 0 0 0 1 2 6 5 0 0 0 0 0 14 NW 0 0 0 1 1 2 1 0 0 0 0 0 5 NNW 0 0 0 0 0 3 1 0 0 0 0 0 4 TOTAL 1 0 3 11 21 75 38 0 0 0 0 0 149 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 149 TOTAL HOURS FOR THE PERIOD: 149 40

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE ALL STABILITY CLASSES FROM 4/ 1/05 0:00 TO 6/30/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 25 16 24 72 34 67 12 1 0 0 0 0 251 NNE 23 14 11 74 38 31 1 0 0 0 0 0 192 NE 27 15 8 22 22 15 0 0 0 0 0 0 109 ENE 22 16 11 20 11 2 0 0 0 0 0 0 82 E 11 16 14 14 6 2 0 0 0 0 0 0 63 ESE 4 18 27 27 10 2 0 0 0 0 0 0 88 SE 7 16 20 64 45 58 7 0 0 0 0 0 217 SSE 2 7 14 33 44 54 19 2 0 0 0 0 175 S 1 9 5 22 30 78 27 2 0 0 0 0 174 SSW 1 5 4 15 27 17 21 1 0 0 0 0 91 SW 0 5 6 14 16 4 7 0 0 0 0 0 52 WSW 5 10 9 15 12 24 9 0 0 0 0 0 84 W 1 14 2 21 15 22 0 0 0 0 0 0 75 WNW 3 10 6 23 14 15 6 0 0 0 0 0 77 NW 9 22 9 16 1 15 16 1 0 0 0 0 99 NNW 18 13 11 31 17 31 26 0 0 0 0 0 147 TOTAL 159 206 181 483 352 437 151 7 0 0 0 0 1976 NUMBER OF CALMS: 31 NUMBER OF INVALID HOURS: 177 NUMBER OF VALID HOURS: 2007 TOTAL HOURS FOR THE PERIOD: 2184 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS A FROM 4/ 1/05 0:00 TO 6/30/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 0__0__0__0__0__1__1__0__0__0__0__0 __2 N 0 0 0 0 0 1 1 0 0 0 0 0 2 NNE 0 0 0 1 0 8 0 0 0 0 0 0 10 NE 0 0 0 0 2 8 0 0 0 0 0 0 10 ENE 0 0 0 0 2 1 0 0 0 0 0 0 3 E 0 0 0 0 0 0 0 0 0 0 0 0 0 ESE 0 0 0 1 0 0 0 0 0 0 0 0 1 SE 0 0 0 0 0 2 0 0 0 0 0 0 2 SSE 0 0 0 0 0 0 0 0 0 0 0 0 0 SS 0 0 0 0 0 0 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 0 0 0 0 O 0 TOTAL 0 0 0 2 4 20 2 0 0 0 0 0 28 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 28 TOTAL HOURS FOR THE PERIOD: 28 41

River Bend Station 2005 Regulatory Guide 1.21 4113/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS B FROM 4/ 1/05 0:00 TO 6/30/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 0 0 S 2 1 0 0 0 0 8 NNE 0 0 0 0 2 3 0 0 0 0 0 0 5 NE 0 1 1 3 5 2 0 0 0 0 0 0 12 ENE 0 0 0 0 2 0 0 0 0 0 0 0 2 E 0 1 1 2 0 1 0 0 0 0 0 0 5 ESE 0 0 1 0 1 0 0 0 0 0 0 0 2 SE 0 0 0 0 1 10 3 0 0 0 0 0 14 SSE 0 0 0 0 0 3 2 0 0 0 0 0 5 S 0 0 0 0 0 0 2 2 0 0 0 0 4 SSW 0 0 0 0 0 0 2 1 0 0 0 0 3 SW 0 0 0 1 0 0 0 0 0 0 0 0 1 WSW 0 0 1 0 1 1 1 0 0 0 0 0 4 W 0 0 0 0 0 0 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 1 0 0 0 0 0 1 NW 0 0 0 0 0 0 5 1 0 0 0 0 6 NNW 0 0 0 0 0 1 6 0 0 0 0 0 7 TOTAL 0 2 4 6 12 26 24 5 0 0 0 0 79 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 79 TOTAL HOURS FOR THE PERIOD: 79 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS C FROM 4/ 1/05 0:00 TO 6/30/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 0 0 2 1 0 .0 0 0 0 3 NNE 0 0 0 3 3 3 0 0 0 0 0 0 9 NE 0 0 0 0 2 2 0 0 0 0 0 0 4 ENE 0 0 0 0 0 0 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 0 0 0 0 0 0 ESE 0 0 0 1 4 1 0 0 0 0 0 0 6 SE 0 0 0 0 7 8 2 0 0 0 0 0 17 SSE 0 0 0 0 1 4 4 0 0 0 0 0 9 S 0 0 0 0 0 1 4 0 0 0 0 0 5 SSW 0 0 0 0 0 1 3 0 0 0 0 0 4 SW 0 0 0 0 1 0 1 0 0 0 0 0 2 WSW 0 0 0 1 2 2 2 0 0 0 0 0 7 W 0 0 0 0 0 1 0 0 0 0 0 0 1 WNW 0 0 0 0 0 1 1 0 0 0 0 0 2 NW 0 1 0 0 0 3 1 0 0 0 0 0 5 NNW 0 0 0 0 1 2 3 0 0 0 0 0 6 TOTAL 0 1 0 5 21 31 22 0 0 0 0 0 80 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 80 TOTAL HOURS FOR THE PERIOD: 80 42

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS D FROM 4/ 1/05 0:00 TO 6/30/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 4 3 17 23 52 8 0 0 0 0 0 107 NNE 0 0 1 16 16 11 0 0 0 0 0 0 44 NE 0 1 1 6 7 3 0 0 0 0 0 0 18 ENE 1 0 3 9 7 1 0 0 0 0 0 0 21 E 0 1 2 9 5 1 0 0 0 0 0 0 18 ESE 0 0 5 14 4 0 0 0 0 0 0 0 23 SE 0 2 3 26 24 29 2 0 0 0 0 0 86 SSE 0 0 0 4 23 37 9 2 0 0 0 0 75 S 0 0 0 2 7 58 21 0 0 0 0 0 88 SSW 0 0 0 4 9 15 16 0 0 0 0 0 44 SW 0 0 0 4 8 4 6 0 0 0 0 0 22 WSW 0 0 1 6 5 18 4 0 0 0 0 0 34 W 0 0 1 15 15 21 0 0 0 0 0 0 52 WNW 0 0 0 8 6 13 4 0 0 0 0 0 31 NW 0 0 0 8 9 12 8 0 0 0 0 0 37 NNW 0 0 0 9 9 24 15 0 0 0 0 0 57 TOTAL 1 8 20 157 177 299 93 2 0 0 0 0 757 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 757 TOTAL HOURS FOR THE PERIOD: 757 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS E FROM 4/ 1/05 0:00 TO 6/30/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 3 1 5 20 8 7 0 0 0 0 0 0 44 NNE 2 4 6 34 15 6 0 0 0 0 0 0 67 NE 0 3 5 11 5 0 0 0 0 0 0 0 24 ENE 0 4 4 8 0 0 0 0 0 0 0 0 16 E 3 5 7 3 1 0 0 0 0 0 0 0 19 ESE 0 7 13 11 1 0 0 0 0 0 0 0 32 SE 3 4 6 27 13 9 0 0 0 0 0 0 62 SSE 0 2 7 23 19 10 4 0 0 0 0 0 65 S 0 2 3 13 19 19 0 0 0 0 0 0 56 SSW 0 1 1 9 18 1 0 0 0 0 0 0 30 SW 0 3 3 8 7 0 0 0 0 0 0 0 21 WSW 0 2 5 7 4 3 0 0 0 0 0 0 21 W 0 5 0 6 0 0 0 0 0 0 0 0 11 WNW 0 3 3 12 8 1 0 0 0 0 0 0 27 NW 0 1 3 6 1 0 2 0 0 0 0 0 13 NNW 1 1 3 8 4 4 2 0 0 0 0 0 23 TOTAL 12 48 74 206 123 60 8 0 0 0 0 0 531 NUMBER OF CALMS: 1 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 532 TOTAL HOURS FOR THE PERIOD: 532 43

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS F FROM 4/ 1/05 0:00 TO 6/30/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 4 7 10 23 2 0 0 0 0 0 0 0 46 NNE 6 5 4 18 2 0 0 0 0 0 0 0 35 NE 7 3 1 2 1 0 0 0 0 0 0 0 14 ENE 9 5 2 3 0 0 0 0 0 0 0 0 19 E 5 8 2 0 0 0 0 0 0 0 0 0 15 ESE 3 10 8 0 0 0 0 0 0 0 0 0 21 SE 2 9 11 11 0 0 0 0 0 0 0 0 33 SSE 1 3 5 4 1 0 0 0 0 0 0 0 14 S 1 4 2 6 4 0 0 0 0 0 0 0 17 SSW 1 2 1 2 0 0 0 0 0 0 0 0 6 SW 0 2 3 1 0 0 0 0 0 0 0 0 6 WSW 2 3 1 1 0 0 1 0 0 0 0 0 8 W 0 7 0 0 0 0 0 0 0 0 0 0 7 WNW 1 2 3 3 0 0 0 0 0 0 0 0 9 NW 3 9 4 2 1 0 0 0 0 0 0 0 19 NNW 7 5 4 7 1 0 0 0 0 0 0 0 24 TOTAL 52 84 61 83 12 0 1 0 0 0 0 0 293 NUMBER OF CALMS: 9 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 302 TOTAL HOURS FOR THE PERIOD: 302 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS G FROM 4/ 1/05 0:00 TO 6/30/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6--2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 18 4 6 12 1 0 0 0 0 0 0 0 41 NNE 15 5 0 2 0 0 0 0 0 0 0 0 22 NE 20 7 0 0 0 0 0 0 0 0 0 0 27 ENE 12 7 2 0 0 0 0 0 0 0 0 0 21 E 3 1 2 0 0 0 0 0 0 0 0 0 6 ESE 1 1 0 0 0 1 0 0 0 0 0 0 3 SE 2 1 0 0 0 0 0 0 0 0 0 0 3 SSE 1 2 2 2 0 0 0 0 0 0 0 0 7 S 0 3 0 1 0 0 0 0 0 0 0 0 4 SSW 0 2 2 0 0 0 0 0 0 0 0 0 4 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 WSW 3 5 1 0 0 0 1 0 0 0 0 0 10 W 1 2 1 0 0 0 0 0 0 0 0 0 4 WNW 2 5 0 0 0 0 0 0 0 0 0 0 7 NW 6 11 2 0 0 0 0 0 0 0 0 0 19 NNW 10 7 4 7 2 0 0 0 0 0 0 0 30 TOTAL 94 63 22 24 3 1 1 0 0 0 0 0 208 NUMBER OF CALMS: 21 NUMBER OF INVALID HOURS: 2 NUMBER OF VALID HOURS: 229 TOTAL HOURS FOR THE PERIOD: 231 44

River Bend Station 2005 Regulatory Guide 1.21 411Y2006 RIVER BEND STATION JOINT FREQUENCY TABLE ALL STABILITY CLASSES FROM 4/ 1/85 0:00 TO 6/30/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.2- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 2 0 4 4 13 46 91 1 1 0 0 0 162 NNE 0 1 1 6 15 63 69 0 0 0 0 0 155 NE 0 1 0 5 12 59 112 5 0 0 0 0 194 ENE 0 3 1 10 17 34 34 2 0 0 0 0 101 E 0 0 3 12 18 43 12 0 0 0 0 0 88 ESE 1 2 3 16 25 69 109 16 0 0 0 0 241 SE 0 1 2 5 9 46 106 9 2 0 0 0 180 SSE 0 0 1 5 18 56 58 9 2 0 0 0 149 S 0 0 1 8 10 52 82 10 2 0 0 0 165 SSW 0 0 1 3 6 40 43 12 0 0 0 0 105 SW 0 0 1 6 9 22 9 3 2 0 0 0 52 WSW 0 0 1 5 10 36 30 5 1 0 0 0 88 W 0 2 1 6 14 43 38 0 1 0 0 0 105 WNW 0 0 1 9 10 26 26 4 1 0 0 0 77 NW 0 1 0 3 6 17 19 14 2 0 0 0 62 NNW 0 0 1 5 2 23 40 14 0 0 0 0 85 TOTAL 3 11 22 108 194 675 878 104 14 0 0 0 2009 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 175 NUMBER OF VALID HOURS: 2009 TOTAL HOURS FOR THE PERIOD: 2184 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS A FROM 4/ 1/05 0:00 TO 6/30/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 0__0_0_0_0_0_0_0_0_0_0_0_0 N____________________________________________

N 0 0 0 0 0 0 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 4 0 0 0 0 0 4 NE 0 0 0 0 1 0 9 4 0 0 0 0 14 ENE 0 0 0 0 0 0 7 0 0 0 0 0 7 E 0 0 0 0 0 1 1 0 0 0 0 0 1 ESE 0 0 0 0 0 0 1 0 0 0 0 0 1 SE 0 0 0 0 0 0 1 0 0 0 0 0 1 SSE 0 0 0 0 0 0 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 0 0 0 0 0 0 NNW O 0 O 0 0 0 0 0 0 0 O 0 0 TOTAL 0 0 0 0 1 1 22 4 0 0 0 0 28 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 28 TOTAL HOURS FOR THE PERIOD: 28 45

River Bend Station 2005 Regulatory Guide 1.21 4113/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS B FROM 4/ 1/05 0:00 TO 6/30/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N_____0____0____0_____0____0____0_____2____0____1_____0_________0_____3_

N 0 0 0 0 0 0 2 0 1 0 0 0 3 NNE 0 0 0 0 0 0 5 0 0 0 0 0 5 NE 0 0 0 0 1 6 7 0 0 0 0 0 14 ENE 0 0 0 1 0 3 3 0 0 0 0 0 7 E 0 0 0 1 1 0 2 0 0 0 0 0 4 ESE 0 0 0 1 0 2 4 1 0 0 0 0 8 SE 0 0 0 0 0 1 8 2 0 0 0 0 11 SSE 0 0 0 0 0 0 0 1 0 0 0 0 1 S 0 0 0 0 0 0 0 3 2 0 0 0 5 SSW 0 0 0 0 0 0 0 2 0 0 0 0 2 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 WSW 0 0 0 0 0 2 1 0 0 0 0 0 3 W 0 0 0 0 0 0 1 0 1 0 0 0 2 WNW 0 0 0 0 0 0 0 1 0 0 0 0 1 NW 0 0 0 0 0 0 0 6 1 0 0 0 7 NNW 0 0 0 0 0 0 1 5 0 0 0 0 6 TOTAL 0 0 0 3 2 14 34 21 5 0 0 0 79 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 79 TOTAL HOURS FOR THE PERIOD: 79 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS C FROM 4/ 1/05 0:00 TO 6/30/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 0 0 3 0 0 0 0 0 3 NNE 0 0 0 0 0 1 1 0 0 0 0 0 2 NE 0 0 0 0 0 5 6 0 0 0 0 0 11 ENE 0 0 0 0 0 0 0 0 0 0 . 0 0 0 E 0 0 0 0 0 2 1 0 0 0 0 0 3 ESE 0 0 0 0 0 6 6 3 0 0 0 0 15 SE 0 1 0 0 0 2 6 1 0 0 0 0 10 SSE 0 0 0 0 0 0 5 0 0 0 0 0 5 S 0 0 0 0 0 0 5 1 0 0 0 0 6 SSW 0 0 0 0 0 0 1 2 0 0 0 0 3 SW 0 0 0 0 0 0 1 0 1 0 0 0 2 WSW 0 0 0 0 0 2 2 2 0 0 0 0 6 W 0 0 0 0 0 0 3 0 0 0 0 0 3 WNW 0 0 0 0 0 0 2 0 1 0 0 0 3 NW 0 0 0 0 0 0 1 1 0 0 0 0 2 NNW 0 0 0 0 0 1 2 3 0 0 0 0 6 TOTAL 0 1 0 0 0 19 45 13 2 0 0 0 80 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 80 TOTAL HOURS FOR THE PERIOD: 80 46

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS D FROM 4/ 1/05 0:00 TO 6/30/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 1 0 2 3 3 26 44 1 0 0 0 0 80 NNE 0 0 0 2 7 37 10 0 0 0 0 0 56 NE 0 0 0 3 4 18 11 0 0 0 0 0 36 ENE 0 0 0 2 9 18 6 1 0 0 0 0 36 E 0 0 2 0 3 15 2 0 0 0 0 0 22 ESE 0 1 0 5 9 25 31 11 0 0 0 0 82 SE 0 0 0 1 3 21 22 4 2 0 0 0 53 SSE 0 0 0 0 6 24 28 5 2 0 0 0 65 S 0 0 0 2 2 18 42 6 0 0 0 0 70 SSW 0 0 0 0 3 12 16 8 0 0 0 0 39 SW 0 0 0 0 4 10 4 3 1 0 0 0 22 WSW 0 0 0 0 3 18 11 3 1 0 0 0 36 W 0 0 0 1 8 27 21 0 0 0 0 0 57 WNW 0 0 0 3 3 15 9 3 0 0 0 0 33 NW 0 0 0 1 5 9 8 4 1 0 0 0 28 NNW 0 0 0 3 1 14 19 5 0 0 0 0 42 TOTAL 1 1 4 26 73 307 284 54 7 0 0 0 757 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 757 TOTAL HOURS FOR THE PERIOD: 757 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS E FROM 4/ 1/05 0:00 TO 6/30/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 1 1 2 13 18 0 0 0 0 0 35 NNE 0 0 1 1 3 12 21 0 0 0 0 0 38 NE 0 0 0 1 6 11 40 1 0 0 0 0 59 ENE 0 0 1 1 3 6 10 1 0 0 0 0 22 E 0 0 0 5 7 8 7 0 0 0 0 0 27 ESE 0 1 2 4 11 25 40 1 0 0 0 0 84 SE 0 0 0 1 1 10 33 2 0 0 0 0 47 SSE 0 0 0 0 2 9 18 3 0 0 0 0 32 S 0 0 0 2 0 17 29 0 0 0 0 0 48 SSW 0 0 1. 3 1 16 22 0 0 0 0 0 43 SW 0 0 0 1 1 2 4 0 0 0 0 0 8 WSW 0 0 0 3 3 6 12 0 0 0 0 0 24 W 0 0 1 1 3 5 11 0 0 0 0 0 21 WNW 0 0 0 4 2 5 7 0 0 0 0 0 18 NW 0 0 0 0 1 4 5 3 0 0 0 0 13 NNW 0 0 0 0 1 3 8 1 0 0 0 0 13 TOTAL 0 1 7 28 47 152 285 12 0 0 0 0 532 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 532 TOTAL HOURS FOR THE PERIOD: 532 47

River Bend Statio 2005 Regulatory Guide 1.21 411312006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS F FROM 4/ 1/05 0:00 TO 6/30/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 1 0 1 0 3 4 16 0 0 0 0 0 25 NNE 0 0 0 2 5 4 18 0 0 0 0 0 29 NE 0 0 0 0 0 9 30 0 0 0 0 0 39 ENE 0 2 0 4 3 4 7 0 0 0 0 0 20 E 0 0 0 5 2 12 0 0 0 0 0 0 19 ESE 1 0 0 1 1 7 23 0 0 0 0 0 33 SE 0 0 1 1 2 7 27 0 0 0 0 0 38 SSE 0 0 0 1 5 13 3 0 0 0 0 0 22 S 0 0 1 3 4 5 5 0 0 0 0 0 18 SSW 0 0 0 0 2 5 3 0 0 0 0 0 10 SW 0 0 0 0 1 7 0 0 0 0 0 0 8 WSW 0 0 0 1 2 2 0 0 0 0 0 0 5 W 0 0 0 2 0 4 1 0 0 0 0 0 7 WNW 0 0 0 2 2 3 6 0 0 0 0 0 13 NW 0 1 0 1 0 4 3 0 0 0 0 0 9 NNW 0 0 0 0 0 3 4 0 0 0 0 0 7 TOTAL 2 3 3 23 32 93 146 0 0 0 0 0 302 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 302 TOTAL HOURS FOR THE PERIOD: 302 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS G FROM 4/ 1/05 0:00 TO 6/30/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 0 5 3 8 0 0 0 0 0 16 NNE 0 1 0 1 0 9 10 0 0 0 0 0 21 NE 0 1 0 1 0 10 9 0 0 0 0 0 21 ENE 0 1 0 2 2 3 1 0 0 0 0 0 9 E 0 0 1 1 5 5 0 0 0 0 0 0 12 ESE 0 0 1 5 4 4 4 0 0 0 0 0 18 SE 0 0 1 2 3 5 9 0 0 0 0 0 20 SSE 0 0 1 4 5 10 4 0 0 0 0 0 24 S 0 0 0 1 4 12 1 0 0 0 0 0 18 SSW 0 0 0 0 0 7 1 0 0 0 0 0 8 SW 0 0 1 5 3 3 0 0 0 0 0 0 12 WSW 0 0 1 1 2 6 4 0 0 0 0 0 14 W 0 2 0 2 3 7 1 0 0 0 0 0 15 WNW 0 0 1 -0 3 3 2 0 0 0 0 0 9 NW 0 0 0 1 0 0 2 0 0 0 0 0 3 NNW 0 0 1 2 0 2 6 0 0 0 0 0 11 TOTAL 0 5 8 28 39 89 62 0 0 0 0 0 231 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 231 TOTAL HOURS FOR THE PERIOD: 231 48

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE ALL STABILITY CLASSES FROM 7/ 1/05 0:00 TO 9/30/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED. (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 17 28 27 51 25 32 9 2 1 0 0 0 192 NNE 22 27 35 75 40 22 4 0 0 0 0 0 225 NE 16 12 26 40 38 35 12 0 0 0 0 0 179 ENE 11 11 14 38 19 20 5 0 0 0 0 0 118 E 5 13 23 24 7 3 2 0 0 0 0 0 77 ESE 0 14 14 23 5 4 2 0 0 0 0 0 62 SE 0 3 30 30 27 16 4 3 0 0 0 0 113 SSE 2 12 9 32 11 10 4 7 5 0 0 0 92 S 0 13 11 25 24 32 14 3 0 0 0 0 122 SSW 1 10 18 40 25 20 4 4 0 0 0 0 122 SW 5 11 16 11 21 12 0 0 0 0 0 0 76 WSW 6 9 18 19 24 25 0 0 0 0 0 0 101 W 9 26 7 31 33 34 0 0 0 0 0 0 140 WNW 6 33 26 28 28 26 3 2 0 0 0 0 152 NW 34 49 20 25 16 26 2 1 2 0 0 0 175 NNW 29 35 22 22 11 17 0 1 2 0 0 0 139 TOTAL 163 306 316 514 354 334 65 23 10 0 0 0 2005 NUMBER OF CALMS: 2 NUMBER OF INVALID HOURS: 121 NUMBER OF VALID HOURS: 2087 TOTAL HOURS FOR THE PERIOD: 2208 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS A FROM 7/ 1/05 0:00 TO 9/30/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N_

_ __ _ _ __ _ __ _ _ __ _ _ __ _ _ __ _ _ _ _ _ _ _ _ _ _ __0_ _0_ __0_ _ _ _ __0_ __0_ __0_ _0_ __0 _ _ _ _

N 0 0 0 0 0 0 0 0 0 0 0 0 0 NNE 0 0 0 0 0 3 0 0 0 0 0 0 3 NE 0 0 0 0 1 11 0 0 0 0 0 0 12 ENE 0 0 0 0 5 12 0 0 0 0 0 0 17 E 0 0 0 0 1 2 0 0 0 0 0 0 3 ESE 0 0 0 0 0 3 0 0 0 0 0 0 3 SE 0 0 0 0 0 2 0 0 0 0 0 0 2 SSE 0 0 0 0 0 0 0 0 0 0 0 0 0 S 0 0 1 0 0 0 0 0 0 0 0 0 1 SSW 0 0 1 0 0 0 0 0 0 0 0 0 1 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 0 0 0 0 0 0 W 0 0 0 0 0 0 1 0 0 0 0 0 1 WNW 0 0 0 0 0 0 1 0 0 0 0 0 1 NW 0 0 0 0 0 0 1 0 0 0 0 0 1 NNW 0 0 0 0 0 1 0 0 0 0 0 0 1 TOTAL 0 0 1 0 7 34 2 0 0 0 0 0 44 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 44 TOTAL HOURS FOR THE PERIOD: 44 49

-J River Bend Station v2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS B FROM 7/ 1/05 0:00 TO 9/30/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

.22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

WIND DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 0 0 3 2 0 0 0 0 0 5 0 0 0 0 1 6 1 0 0 0 0 0 8 NNE NE 0 0 0 1 8 4 0 0 0 0 0 0 13 0 0 0 0 2 2 0 0 0 0 0 0 4 ENE E 0 0 0 2 1 1 0 0 0 0 0 0 4 ESE 0 0 0 0 2 0 0 0 0 0 0 0 2 SE 0 0 0 0 1 3 0 0 0 0 0 0 4 SSE 0 0 0 0 0 2 0 0 0 0 0 0 2 S 0 0 0 0 0 0 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 WSW 0 0 0 0 0 1 0 0 0 0 0 0 1 W 0 0 0 0 0 0 0 0 0 0 0 0 0 WNW 0 0 0 0 0 1 0 0 0 0 0 0 1 NW 0 0 0 0 0 3 1 0 0 0 0 0 4 NNW 0 00 0 0 0 0 0 0 0 0 0 0 TOTAL 0 0 0 3 15 26 4 0 0 0 0 0 48 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 48 TOTAL HOURS FOR THE PERIOD: 48 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS C FROM 7/ 1/05 0:00 TO 9/30/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .S1- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 1 0 0 3 0 0 0 0 0 0 4 NNE 0 0 0 0 4 5 0 0 0 0 0 0 9 NE 0 0 0 2 5 2 0 0 0 0 0 0 9 ENE 0 0 0 1 2 1 0 0 0 0 0 0 4 E 0 0 0 1 3 0 0 0 0 0 0 0 4 ESE 0 0 0 0 0 0 0 0 0 0 0 0 0 SE 0 0 0 0 3 3 0 0 0 0 0 0 6 SSE 0 0 0 0 0 0 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 0 0 0 0 0 0 SW 0 0 0 0 1 1 0 0 0 0 0 0 2 WSW 0 0 0 0 0 2 0 0 0 0 0 0 2 W 0 0 0 0 0 1 0 0 0 0 0 0 1 WNW 0 0 0 0 0 4 0 0 0 0 0 0 4 NW 0 0 0 0 0 1 0 0 0 0 0 0 1 NNW 0 0 1 0 0 4 0 0 0 0 0 0 5 TOTAL 0 0 2 4 18 27 0 0 0 0 0 0 51 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 51 TOTAL HOURS FOR THE PERIOD: 51 50

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS D FROM 7/ 1/05 0:00 TO 9/30/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 1 0 0 9 19 24 7 1 0 0 0 0 61 NNE 0 0 3 9 24 7 1 0 0 0 0 0 44 NE 1 0 3 12 15 5 4 0 0 0 0 0 40 ENE 0 1 3 7 8 4 3 0 0 0 0 0 26 E 0 0 6 11 1 0 2 0 0 0 0 0 20 ESE 0 2 2 10 3 1 2 0 0 0 0 0 20 SE 0 1 2 11 20 6 4 3 0 0 0 0 47 SSE 0 0 1 4 8 7 0 3 5 0 0 0 28 S 0 0 2 5 11 27 8 1 0 0 0 0 54 SSW 0 0 0 11 16 15 3 4 0 0 0 0 49 SW 0 0 0 4 19 11 0 0 0 0 0 0 34 WSW 0 0 3 13 24 21 0 0 0 0 0 0 61 W 0 2 0 15 31 31 0 0 0 0 0 0 79 WNW 0 1 2 15 21 14 0 1 0 0 0 0 54 NW 0 0 0 16 15 15 0 1 1 0 0 0 48 NNW 0 0 2 12 11 12 0 1 1 0 0 0 39 TOTAL 2 7 29 164 246 200 34 15 7 0 0 0 704 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 704 TOTAL HOURS FOR THE PERIOD: 704 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS E FROM 7/ 1/05 0:00 TO 9/30/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 1 8 13 21 6 2 0 1 1 0 0 0 53 NNE 1 8 15 43 10 0 2 0 0 0 0 0 79 NE 2 3 18 19 8 13 8 0 0 0 0 0 71 ENE 1 6 9 22 2 1 2 0 0 0 0 0 43 E 1 6 11 9 1 0 0 0 0 0 0 0 28 ESE 0 7 9 12 0 0 0 0 0 0 0 0 28 SE 0 1 22 15 3 2 0 0 0 0 0 0 43 SSE 2 7 7 19 3 1 4 4 0 0 0 0 47 S 0 8 5 15 13 5 6 2 0 0 0 0 54 SSW 0 4 13 27 9 5 1 0 0 0 0 0 59 SW 1 4 10 5 1 0 0 0 0 0 0 0 21 WSW 4 5 9 6 0 1 0 0 0 0 0 0 25 W 1 6 4 15 2 2 0 0 0 0 0 0 30 WNW 2 4 18 11 7 6 2 1 0 0 0 0 51 NW 2 4 8 8 1 6 0 0 1 0 0 0 30 NNW 2 3 7 5 0 0 0 0 1 0 0 0 18 TOTAL 20 84 178 252 66 44 25 8 3 0 0 0 680 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 680 TOTAL HOURS FOR THE PERIOD: 680 51

River Bend Station 2005 Regulatory Guide 1.21 411312006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS F FROM 7/ 1/05 0:00 TO 9/30/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 7 10 11 19 0 0 0 0 0 0 0 0 47 NNE 4 9 15 23 1 1 0 0 0 0 0 0 53 NE 6 6 4 6 1 0 0 0 0 0 0 0 23 ENE 4 2 1 6 0 0 0 0 0 0 0 0 13 E 3 6 5 0 0 0 0 0 0 0 0 0 14 ESE 0 5 3 1 0 0 0 0 0 0 0 0 9 SE 0 1 5 4 0 0 0 0 0 0 0 0 10 SSE 0 5 0 9 0 0 0 0 0 0 0 0 14 S 0 4 4 5 0 0 0 0 0 0 0 0 13 SSW 1 4 3 2 0 0 0 0 0 0 0 0 10 SW 3 7 6 2 0 0 0 0 0 0 0 0 18 WSW 0 3 5 0 0 0 0 0 0 0 0 0 8 W 6 13 3 1 0 0 0 0 0 0 0 0 23 WNW 2 18 6 2 0 0 0 0 0 0 0 0 28 NW 9 17 8 1 0 1 0 0 0 0 0 0 36 NNW 7 7 7 1 0 0 0 0 0 0 0 0 22 TOTAL 52 117 86 82 2 2 0 0 0 0 0 0 341 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 341 TOTAL HOURS FOR THE PERIOD: 341 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS G FROM 7/ 1/05 0:00 TO 9/30/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N______ 8 ______ 10 _____2 ____2 ___0 ____0 ___0 ____0 ___0 ____0 ___0 ____0 ___22 __

N 8 10 2 2 0 0 0 0 0 0 0 0 22 NNE 17 10 2 0 0 0 0 0 0 0 0 0 29 NE 7 3 1 0 0 0 0 0 0 0 0 0 11 ENE 6 2 1 2 0 0 0 0 0 0 0 0 11 E 1 1 1 1 0 0 0 0 0 0 0 0 4 ESE 0 0 0 0 0 0 0 0 0 0 0 0 0 SE 0 0 1 0 0 0 0 0 0 0 0 0 1 SSE 0 0 1 0 0 0 0 0 0 0 0 0 1 S 0 1 0 0 0 0 0 0 0 0 0 0 1 SSW 0 2 1 0 0 0 0 0 0 0 0 0 3 SW 1 0 0 0 0 0 0 0 0 0 0 0 1 WSW 2 1 1 0 0 0 0 0 0 0 0 0 4 W 2 5 0 0 0 0 0 0 0 0 0 0 7 WNW 2 10 0 0 0 1 0 0 0 0 0 0 13 NW 23 28 4 0 0 0 0 0 0 0 0 0 55 NNW 20 25 5 4 0 0 0 0 0 0 0 0 54 TOTAL 89 98 20 9 0 1 0 0 0 0 0 0 217 NUMBER OF CALMS: 2 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 219 TOTAL HOURS FOR THE PERIOD: 219 52

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE ALL STABILITY CLASSES FROM 7/ 1/05 0:00 TO 9/30/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 1 1 7 13 22 32 2 2 1 0 0 81 NNE 0 1 2 7 13 47 48 4 1 0 0 0 123 NE 0 1 2 12 20 71 161 11 2 2 0 0 282 ENE 0 2 5 19 35 61 93 24 16 5 0 0 260 E 0 1 6 9 28 39 14 2 1 1 0 0 101 ESE 0 1 3 9 22 42 69 0 1 6 0 0 153 SE 1 1 1 7 13 44 24 0 0 2 1 0 94 SSE 0 0 3 7 15 22 3 0 7 5 0 0 62 S 1 1 0 16 24 57 36 7 3 0 0 0 145 SSW 0 1 3 9 25 68 27 2 7 0 0 0 142 SW 0 1 2 9 20 35 11 0 0 0 0 0 78 WSW 0 1 3 13 26 51 21 0 0 0 0 0 115 W 0 0 3 18 35 83 38 2 0 0 0 0 179 WNW 0 2 2 11 24 47 22 1 3 1 0 0 113 NW 0 0 3 13 24 28 20 0 1 1 1 0 91 NNW 0 0 0 14 16. 18 17 1 0 0 2 0 68 TOTAL 2 14 39 180 353 735 636 56 44 24 4 0 2087 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 121 NUMBER OF VALID HOURS: 2087 TOTAL HOURS FOR THE PERIOD: 2208 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS A FROM 7/ 1/05 0:00 TO 9/30/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N_____0____0____0_____0____0____0_____0____0____0_____0____0____0_____0_

N 0 0 0 0 0 0 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 2 0 0 0 0 0 0 NE 0 0 0 0 0 0 2 4 0 0 0 0 6 ENE 0 0 0 0 0 0 18 10 0 0 0 0 28 E 0 0 0 0 0 0 3 1 0 0 0 0 4 ESE 0 0 0 0 0 0 1 0 0 0 0 0 1 SE 0 0 0 0 0 0 1 0 0 0 0 0 1 SSE 0 0 0 0 0 0 0 0 0 0 0 0 0 S 0 0 0 1 0 0 0 0 0 0 0 0 1 SSW 0 0 0 1 0 0 0 0 0 0 0 0 1 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 0 0 0 0 0 0 W O O O O O O O O O O O O O WNW 0 0 0 0 0 0 2 0 0 0 0 0 2 NW 0 0 0 0 0 0 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 1 0 0 0 0 0 1 TOTAL 0 0 0 1 0 0 28 15 0 0 0 0 44 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 44 TOTAL HOURS FOR THE PERIOD: 44 53

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS B FROM 7/ 1/05 0:00 TO 9/30/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N_____0____0____0_____0____0____2_____2____1____0_____0____0____0_____5_

N 0 0 0 0 0 2 2 1 0 0 0 0 5 NNE 0 0 0 0 0 0 3 1 0 0 0 0 4 NE 0 0 0 0 0 1 7 1 0 0 0 0 9 ENE 0 0 0 0 0 4 7 4 0 0 0 0 3s E 0 0 0 0 0 2 1 0 0 0 0 0 3 ESE 0 0 0 0 0 1 3 0 0 0 0 0 4 SE 0 0 0 0 0 0 2 0 0 0 0 0 2 SSE 0 0 0 0 0 0 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 1 0 0 0 0 0 1 WSW 0 0 0 0 0 0 1 0 0 0 0 0 1 W 0 0 0 0 0 0 2 0 0 0 0 0 2 WNW 0 0 0 0 0 0 2 0 0 0 0 0 2 NW 0 0 0 0 0 0 3 0 0 0 0 0 3 NNW 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTAL 0 0 0 0 0 10 31 7 0 0 0 0 48 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 48 TOTAL HOURS FOR THE PERIOD: 48 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS C FROM 7/ 1/05 0:00 TO 9/30/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >1B TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N_____0____0____0_____0____1____0_____2____0____0_____0____0____0_____3_

N 0 0 0 0 1 0 2 0 0 0 0 0 3 NNE 0 0 0 0 0 2 1 0 0 0 0 0 3 NE 0 0 0 0 0 5 7 0 0 0 0 0 12 ENE 0 0 0 0 0 4 6 0 0 0 0 0 10 E 0 0 0 0 0 2 0 0 0 0 0 0 2 ESE 0 0 0 0 0 2 3 0 0 0 0 0 1 SE 0 0 0 0 0 0 1 0 0 0 0 0 1 SSE 0 0 0 0 0 0 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 0 0 0 0 0 0 SSW 0 0 0 0 0 1 1 0 0 0 0 0 2 SW 0 0 0 0 0 1 1 0 0 0 0 0 2 WSW 0 0 0 0 0 0 2 0 0 0 0 0 2 W 0 0 0 0 0 1 1 0 0 0 0 0 1 WNW 0 0 0 0 0 1 4 0 0 0 0 0 5 NW 0 0 0 0 0 0 1 0 0 0 0 0 1 NNW 0 0 0 1 0 0 3 0 0 0 0 0 4 TOTAL 0 0 0 1 1 17 32 0 0 0 0 0 51 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 51 TOTAL HOURS FOR THE PERIOD: 51 54

River Bend Statio 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS D FROM 7/ 1/05 0:00 TO 9/30/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 3 6 7 17 1 1 0 0 0 35 NNE 0 0 0 4 9 19 19 1 1 0 0 0 53 NE 0 0 1 4 5 19 19 2 0 0 0 0 50 ENE 0 0 1 3 7 14 17 5 7 2 0 0 56 E 0 0 0 0 9 11 3 0 1 1 0 0 25 ESE 0 0 1 0 5 8 16 0 1 6 0 0 37 SE 0 0 0 3 4 11 4 0 0 2 1 0 25 SSE 0 0 0 1 1 5 3 0 1 5 0 0 16 S 0 0 0 6 7 18 19 3 0 0 0 0 53 SSW 0 0 0 2 7 18 12 2 7 0 0 0 48 SW 0 0 0 1 5 16 10 0 0 0 0 0 32 WSW 0 0 0 3 15 30 14 0 0 0 0 0 62 W 0 0 0 4 19 57 20 0 0 0 0 0 100 WNW 0 0 0 6 9 17 7 0 1 1 0 0 41 NW 0 0 1 3 12 13 9 0 1 0 1 0 40 NNW 0 0 0 4 9 9 7 1 0 0 1 0 31 TOTAL 0 0 4 47 129 272 196 15 21 17 3 0 704 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 704 TOTAL HOURS FOR THE PERIOD: 704 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS E FROM 7/ 1/05 0:00 TO 9/30/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 1 2 8 7 0 1 1 0 0 20 NNE 0 0 2 2 1 15 11 1 0 0 0 0 32 NE 0 1 1 4 8 35 60 4 2 2 0 0 117 ENE 0 1 3 7 13 27 29 5 9 3 0 0 97 E 0 0 2 4 10 12 5 1 0 0 0 0 34 ESE 0 1 0 3 5 16 28 0 0 0 0 0 53 SE 0 1 0 2 3 16 10 0 0 0 0 0 32 SSE 0 0 1 0 2 12 0 0 6 0 0 0 21 S 0 1 0 4 9 23 14 4 3 0 0 0 58 SSW 0 0 1 1 7 33 14 0 0 0 0 0 56 SW 0 0 0 3 5 10 0 0 0 0 0 0 18 WSW 0 0 1 2 4 10 4 0 0 0 0 0 21 W 0 0 0 7 11 14 15 2 0 0 0 0 49 WNW 0 0 2 3 7 9 6 1 2 0 0 0 30 NW 0 0 1 7 6 3 5 0 0 1 0 0 23 NNW 0 0 0 6 6 5 1 0 0 0 1 0 19 TOTAL 0 5 14 56 99 248 209 18 23 7 1 0 680 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 680 TOTAL HOURS FOR THE PERIOD: 680 55

River Bend Station 2005 Regulatory Guide 1.21 4113/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS F FROM 7/ 1/05 0:00 TO 9/30/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 1 0 1 3 4 4 0 0 0 0 0 13 NNE 0 0 0 1 2 6 12 1 0 0 0 0 22 NE 0 0 0 2 4 6 49 0 0 0 0 0 61 ENE 0 0 0 5 10 10 11 0 0 0 0 0 36 E 0 0 3 4 1 8 2 0 0 0 0 0 18 ESE 0 0 1 5 9 11 14 0 0 0 0 0 40 SE 0 0 0 1 3 8 6 0 0 0 0 0 18 SSE 0 0 1 1 5 2 0 0 0 0 0 0 9 S 0 0 0 3 4 10 3 0 0 0 0 0 20 SSW 0 1 0 1 4 13 1 0 .0 0 0 0 20 SW 0 0 1 0 7 5 0 0 0 0 0 0 13 WSW 0 1 1 3 3 8 0 0 0 0 0 0 16 W 0 0 1 4 3 10 1 0 0 0 0 0 19 WNW 0 0 0 1 3 12 1 0 0 0 0 0 17 NW 0 0 0 0 3 6 2 0 0 0 0 0 11 NNW 0 0 0 1 1 2 4 0 0 0 0 0 8 TOTAL 0 3 8 33 65 121 110 1 0 0 0 0 341 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 341 TOTAL HOURS FOR THE PERIOD: 341 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS G FROM 7/ 1/05 0:00 TO 9/30/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 1 2 1 1 0 0 0 0 0 0 5 NNE 0 1 0 0 1 5 2 0 0 0 :0 0 9 NE 0 0 0 2 3 5 17 0 0 0 0 0 27 ENE 0 1 1 4 5 2 5 0 0 0 0 0 18 E 0 1 1 1 8 4 0 0 0 0 0 0 15 ESE 0 0 1 1 3 4 4 0 0 0 0 0 13 SE 1 0 1 1 3 9 0 0 0 0 0 0 15 SSE 0 0 1 5 7 3 0 0 0 0 0 0 16 S 1 0 0 3 4 6 0 0 0 0 0 0 14 SSW 0 0 2 4 7 4 0 0 0 0 0 0 17 SW 0 1 1 5 3 3 0 0 0 0 0 0 13 WSW 0 0 1 5 4 3 0 0 0 0 0 0 13 W 0 0 2 3 2 2 1 0 0 0 0 0 10 WNW 0 2 0 1 5 8 0 0 0 0 0 0 16 NW 0 0 1 3 3 6 0 0 0 0 0 0 13 NNW 0 0 0 2 0 2 1 0 0 0 0 0 5 TOTAL 2 6 13 42 59 67 30 0 0 0 0 0 219 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 219 TOTAL HOURS FOR THE PERIOD: 219 56

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE ALL STABILITY CLASSES FROM 10/ 1/05 0:00 TO 12/31/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 25 56 39 109 84 141 58 0 0 0 0 0 512 NNE 14 14 19 77 50 38 7 0 0 0 0 0 219 NE 16 19 19 47 42 20 0 0 0 0 0 0 163 ENE 6 23 21 19 13 9 0 0 0 0 0 0 91 E 5 23 15 15 10 S 0 0 0 1 0 0 74 ESE 2 12 19 21 16 0 0 0 0 0 0 0 70 SE 3 8 13 37 37 29 2 0 0 0 0 1 130 SSE 1 10 6 22 15 24 21 0 0 0 0 1 100 S 1 6 3 12 14 24 34 0 0 0 0 0 94 SSW 0 2 4 16 12 20 7 0 0 0 0 0 61 SW 1 4 5 12 5 4 4 0 0 0 0 0 35 WSW 2 10 4 3 5 5 0 0 0 0 0 0 29 W 1 11 14 14 6 9 1 2 0 0 0 0 58 WNW 3 19 20 17 13 8 6 0 0 0 0 0 86 NW 5 28 27 16 8 1S 17 0 0 0 0 0 116 NNW 8 24 16 30 25 61 53 1 0 0 0 0 218 TOTAL 93 269 244 467 355 412 210 3 0 1 0 2 2056 NUMBER OF CALMS: 5 NUMBER OF INVALID HOURS: 147 NUMBER OF VALID HOURS: 2061 TOTAL HOURS FOR THE PERIOD: 2208 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS A FROM 10/ 1/05 0:00 TO 12/31/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 2 4 11 4 0 0 0 0 0 21 NNE 0 0 0 0 2 17 6 0 0 0 0 0 25 NE 0 0 0 0 3 7 0 0 0 0 0 0 10 ENE 0 0 0 1 2 7 0 0 0 0 0 0 10 E 0 0 0 0 3 2 0 0 0 1 0 0 6 ESE 0 0 0 1 5 0 0 0 0 0 0 0 6 SE 0 0 0 0 5 8 0 0 0 0 0 1 14 SSE 0 0 0 0 1 1 2 0 0 0 0 1 5 S 0 0 0 0 0 1 0 0 0 0 0 0 1 SSW 0 0 0 0 0 0 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 0 0 0 0 0 0 W 0 0 0 0 1 0 0 0 0 0 0 1 WNW 0 0 0 1 0 0 0 0 0 0 0 0 1 NW 0 0 0 0 0 0 1 0 0 0 0 0 1 NNW 0 0 0 0 5 4 6 0 0 0 0 0 15 TOTAL 0 0 0 5 31 58 19 0 0 1 0 2 116 NUMBER OF CALMS: 2 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 118 TOTAL HOURS FOR THE PERIOD: 118 57

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS B FROM 10/ 1/05 0:00 TO 12/31/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 2 1 18 9 0 0 0 0 0 30 NNE 0 0 0 0 1 5 0 0 0 0 0 0 6 NE 0 0 0 0 7 0 0 0 0 0 0 0 7 ENE 0 0 0 0 2 0 0 0 0 0 0 0 2 E 0 0 0 0 0 1 0 0 0 0 0 0 1 ESE 0 0 0 0 5 0 0 0 0 0 0 0 5 SE 0 0 0 0 4 10 0 0 0 0 0 0 14 SSE 0 0 0 0 0 2 4 0 0 0 0 0 6 S 0 0 0 0 1 2 2 0 0 0 0 0 5 SSW 0 0 0 0 0 1 0 0 0 0 0 0 1 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 WSW 0 0 0 0 1 1 0 0 0 0 0 0 2 W 0 0 0 0 1 0 0 0 0 0 0 0 1 WNW 0 0 0 0 0 0 0 0 0 0 0 0 0 NW 0 0 0 0 0 1 4 0 0 0 0 0 5 NNW 0 0 0 0 0 2 9 0 0 0 0 0 11 TOTAL 0 0 0 2 23 43 28 0 0 0 0 0 96 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 96 TOTAL HOURS FOR THE PERIOD: 96 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS C FROM 10/ 1/05 0:00 TO 12/31/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 3 1 5 3 0 0 0 0 0 12 NNE 0 0 1 0 1 0 0 0 0 0 0 0 2 NE 0 0 0 0 6 0 0 0 0 0 0 0 6 ENE 0 0 0 1 0 0 0 0 0 0 0 0 1 E 0 0 0 2 1 1 0 0 0 0 0 0 4 ESE 0 0 0 0 2 0 0 0 0 0 0 0 2 SE 0 0 0 0 1 2 0 0 0 0 0 0 3 SSE 0 0 0 0 0 0 1 0 0 0 0 0 1 S 0 0 0 0 0 5 8 0 0 0 0 0 13 SSW 0 0 0 0 0 4 3 0 0 0 0 0 7 SW 0 0 0 0 0 1 2 0 0 0 0 0 3 WSW 0 0 0 0 0 1 0 0 0 0 0 0 1 W 0 0 0 0 0 2 0 0 0 0 0 0 2 WNW 0 0 0 0 0 1 2 0 0 0 0 0 3 NW 0 0 0 0 0 0 2 0 0 0 0 0 2 NNW 0 0 0 0 0 3 5 0 0 0 0 0 8 TOTAL 0 0 1 6 12 25 26 0 0 0 0 0 70 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 70 TOTAL HOURS FOR THE PERIOD: 70 58

River Bend Statio 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS D FROM 10/ 1/05 0:00 TO 12/31/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 3 12 33 68 32 0 0 0 0 0 148 NNE 0 0 4 5 12 8 1 0 0 0 0 0 30 NE 1 1 3 2 10 3 0 0 0 0 0 0 20 ENE 0 0 0 5 6 2 0 0 0 0 0 0 13 E 0 0 2 7 2 0 0 0 0 0 0 0 11 ESE 0 0 3 10 3 0 0 0 0 0 0 0 16 SE 0 1 0 4 5 4 1 0 0 0 0 0 15 SSE 0 2 1 2 4 15 11 0 0 0 0 0 35 S 0 0 0 0 6 9 20 0 0 0 0 0 35 SSW 0 0 0 0 8 14 4 0 0 0 0 0 26 SW 0 0 1 5 4 0 2 0 0 0 0 0 12 WSW 0 0 0 3 4 3 0 0 0 0 0 0 10 W 0 0 0 8 4 7 1 2 0 0 0 0 22 WNW 0 0 1 6 6 6 4 0 0 0 0 0 23 NW 0 0 0 2 4 13 10 0 0 0 0 0 29 NNW 0 0 0 3 8 41 31 1 0 0 0 0 84 TOTAL 1 4 18 74 119 193 117 3 0 0 0 0 529 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 529 TOTAL HOURS FOR THE PERIOD: 529 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS E FROM 10/ 1/05 0:00 TO 12/31/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 4 5 41 39 39 10 0 0 0 0 0 138 NNE 0 0 4 37 32 8 0 0 0 0 0 0 81 NE 1 2 7 22 14 9 0 0 0 0 0 0 55 ENE 2 1 9 8 3 0 0 0 0 0 0 0 23 E 1 3 6 3 4 1 0 0 0 0 0 0 18 ESE 0 4 9 7 1 0 0 0 0 0 0 0 21 SE 2 4 8 17 18 5 1 0 0 0 0 0 55 SSE 0 1 2 11 9 6 3 0 0 0 0 0 32 S 0 2 0 9 6 7 4 0-' 0 0 0 0 28 SSW 0 1 2 9 4 1 0 0 0 0 0 0 17 SW 0 0 3 2 1 3 0 0 0 0 0 0 9 WSW 0 2 2 0 0 0 0 0 0 0 0 0 4 W 0 0 6 5 0 0 0 0 0 0 0 0 11 WNW 0 1 3 5 5 1 0 0 0 0 0 0 15 NW 0 3 2 6 3 1 0 0 0 0 0 0 15 NNW 0 1 7 8 12 10 2 0 0 0 0 0 40 TOTAL 6 29 75 190 151 91 20 0 0 0 0 0 562 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 562 TOTAL HOURS FOR THE PERIOD: 562 59

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS F FROM 10/ 1/05 0:00 TO 12/31/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 3 8 29 6 0 0 0 0 0 0 0 46 NNE 0 1 2 33 2 0 0 0 0 0 0 0 38 NE 0 0 3 20 2 1 0 0 0 0 0 0 26 ENE 0 2 8 3 0 0 0 0 0 0 0 0 13 E 0 9 1 2 0 0 0 0 0 0 0 0 12 ESE 1 5 4 2 0 0 0 0 0 0 0 0 12 SE 1 1 3 12 4 0 0 0 0 0 0 0 21 SSE 1 4 3 8 1 0 0 0 0 0 0 0 17 S 1 2 3 2 1 0 0 0 0 0 0 0 9 SSW 0 1 2 7 0 0 0 0 0 0 0 0 10 SW 0 0 1 5 0 0 0 0 0 0 0 0 6 WSW 0 2 1 0 0 0 0 0 0 0 0 0 3 W 0 2 3 1 0 0 0 0 0 0 0 0 6 WNW 0 2 5 3 2 0 0 0 0 0 0 0 12 NW 0 2 2 5 1 0 0 0 0 0 0 0 10 NNW 0 2 4 12 0 1 0 0 0 0 0 0 19 TOTAL 4 38 53 144 19 2 0 0 0 0 0 0 260 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 260 TOTAL HOURS FOR THE PERIOD: 260 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS G FROM 10/ 1/05 0:00 TO 12/31/05 23:00 PRIMARY SENSORS - 30 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 25 49 23 20 0 0 0 0 0 0 0 0 117 NNE 14 13 8 2 0 0 0 0 0 0 0 ,0 37 NE 14 16 6 3 0 0 0 0 0 0 0 0 39 ENE 4 20 4 1 0 0 0 0 0 0 0 0 29 E 4 11 6 1 0 0 0 0 0 0 0 0 22 ESE 1 3 3 1 0 0 0 0 0 0 0 0 8 SE 0 2 2 4 0 0 0 0 0 0 0 0 8 SSE 0 3 0 1 0 0 0 0 0 0 0 0 4 S 0 2 0 1 0 0 0 0 0 0 0 0 3 SSW 0 0 0 0 0 0 0 0 0 0 0 0 0 SW 1 4 0 0 0 0 0 0 0 0 0 0 5 WSW 2 6 1 0 0 0 0 0 0 0 0 0 9 W 1 9 5 0 0 0 0 0 0 0 0 0 15 WNW 3 16 11 2 0 0 0 0 0 0 0 0 32 NW 5 23 23 3 0 0 0 0 0 0 0 0 54 NNW 8 21 5 7 0 0 0 0 0 0 0 0 41 TOTAL 82 198 97 46 0 0 0 0 0 0 0 0 423 NUMBER OF CALMS: 3 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 426 TOTAL HOURS FOR THE PERIOD: 426 60

River Benld Statio 2005 Regulatory Guide 1.21 411312006 RIVER BEND STATION JOINT FREQUENCY TABLE ALL STABILITY CLASSES FROM 10/ 1/05 0:00 TO 12/31/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 1 6 7 68 135 17 0 0 0 0 234 NNE 0 0 0 7 13 77 156 4 0 0 0 0 257 NE 1 0 0 7 11 45 159 8 0 0 0 0 231 ENE 1 0 1 4 9 31 69 44 1 0 0 0 160 E 1 0 0 8 8 19 37 1 0 0 0 0 74 ESE 0 0 2 4 5 19 105 7 0 1 0 2 145 SE 0 0 1 2 8 22 76 2 0 0 0 0 111 SSE 0 0 2 5 10 40 52 8 0 0 0 0 117 S 0 0 1 2 10 36 64 20 0 0 0 0 133 SSW 0 0 1 3 9 33 27 8 3 0 0 0 84 SW 0 1 1 3 5 16 14 3 0 0 0 0 43 WSW 0 1 2 3 9 26 7 0 0 0 0 0 48 W 0 0 1 2 9 40 24 1 0 0 0 0 77 WNW 0 0 1 4 4 40 38 4 0 0 0 0 91 NW 1 0 1 2 3 27 47 5 0 0 0 0 86 NNW 0 0 0 1 6 18 112 30 0 0 0 0 167 TOTAL 4 2 15 63 126 557 1122 162 4 1 0 2 2058 NUMBER OF CALMS: 3 NUMBER OF INVALID HOURS: 147 NUMBER OF VALID HOURS: 2061 TOTAL HOURS FOR THE PERIOD: 2208 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS A FROM 10/ 1/05 0:00 TO 12/31/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 0 0 0 4 0 0 0 0 0 4 NNE 0 0 0 0 0 3 11 2 0 0 0 0 16 NE 0 0 0 0 0 5 18 3 0 0 0 0 26 ENE 0 0 0 0 0 3 15 5 0 0 0 0 23 E 0 0 0 0 0 0 13 0 0 0 0 0 13 ESE 0 0 0 0 1 3 5 0 0 1 0 2 12 SE 0 0 0 0 1 1 5 0 0 0 0 0 7 SSE 0 0 0 0 0 1 2 0 0 0 0 0 3 S 0 0 0 0 1 0 1 .0 0 0 0 0 2 SSW 0 0 0 0 0 0 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 0 0 0 0 0 0 W 0 0 0 0 1 0 0 0 0 0 0 0 1 WNW 0 0 0 0 1 0 0 0 0 0 0 0 1 NW 0 0 0 0 0 0 1 0 0 0 0 0 1 NNW 0 0 0 0 0 0 1 6 0 0 0 0 7 TOTAL 0 0 0 0 5 16 76 16 0 1 0 2 116 NUMBER OF CALMS: 2 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 118 TOTAL HOURS FOR THE PERIOD: 118 61

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS B FROM 10/ 1/05 0:00 TO 12/31/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N_____0____0____0____0____0_______________3____0____0____0____0____13___

N 0 0 0 0 0 4 6 3 0 0 0 0 13 NNE 0 0 0 0 0 4 14 1 0 0 0 0 19 NE 0 0 0 0 0 1 4 0 0 0 0 0 5 ENE 0 0 0 0 1 2 1 2 0 0 0 0 6 E 0 0 0 0 0 0 3 0 0 0 0 0 3 ESE 0 0 0 1 0 3 13 0 0 0 0 0 17 SE 0 0 0 0 0 3 1 0 0 0 0 0 4 SSE 0 0 0 0 0 0 3 1 0 0 0 0 4 S 0 0 0 0 0 1 4 0 0 0 0 0 5 SSW 0 0 0 0 0 0 1 0 0 0 0 0 1 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 WSW 0 0 0 0 1 1 0 0 0 0 0 0 2 W 0 0 0 0 0 0 1 0 0 0 0 0 1 WNW 0 0 0 0 0 0 1 0 0 0 0 0 1 NW 0 0 0 0 0 0 6 1 0 0 0 0 7 NNW 0 0 0 0 0 0 2 6 0 0 0 0 8 TOTAL 0 0 0 1 2 19 60 14 0 0 0 0 96 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 96 TOTAL HOURS FOR THE PERIOD: 96 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS C FROM 10/ 1/05 0:00 TO 12/31/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N_____0____0____0_____1____0____1__________1____0_____0____0____________

N 0 0 0 1 0 1 2 1 0 0 0 0 5 NNE 0 0 0 1 0 2 2 0 0 0 0 0 5 NE 0 0 0 0 0 4 2 0 0 0 0 0 6 ENE 0 0 0 0 0 1 1 1 0 0 0 0 3 E 0 0 0 0 0 2 2 0 0 0 0 0 4 ESE 0 0 0 0 0 0 5 0 0 0 0 0 5 SE 0 0 0 0 0 0 0 0 0 0 0 0 0 SSE 0 0 0 0 1 0 1 0 0 0 0 0 2 S 0 0 0 0 0 1 10 4 0 0 0 0 i5 SSW 0 0 0 0 0 1 3 1 0 0 0 0 5 SW 0 0 0 0 0 0 2 1 0 0 0 0 3 WSW 0 0 0 0 0 0 1 0 0 0 0 0 1 W 0 0 0 0 0 0 2 0 0 0 0 0 2 WNW 0 0 0 0 0 0 2 1 0 0 0 0 3 NW 0 0 0 0 0 0 3 1 0 0 0 0 4 NNW O 0 0 0 1, 0 5 I 0 0 0 0 7 TOTAL 0 0 0 2 2 12 43 11 0 0 0 0 70 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 70 TOTAL HOURS FOR THE PERIOD: 70 62

River Bend Station 2005 Regulatory Guide 1.21 4/13/2006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS D FROM 10/ 1/05 0:00 TO 12/31/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 1 2 4 25 35 9 0 0 0 0 76 NNE 0 0 0 3 6 19 20 1 0 0 0 0 49 NE 0 0 0 7 4 9 8 0 0 0 0 0 28 ENE 1 0 0 3 0 8 9 9 1 0 0 0 31 E 0 0 0 4 5 2 4 0 0 0 0 0 15 ESE 0 0 0 0 2 4 9 2 0 0 0 0 17 SE 0 0 0 1 2 3 8 1 0 0 0 0 15 SSE 0 0 2 3 3 5 14 6 0 0 0 0 33 S 0 0 0 1 1 10 21 13 0 0 0 0 46 SSW 0 0 0 0 4 11 18 7 3 0 0 0 43 SW 0 0 1 1 1 5 1 2 0 0 0 0 11 WSW 0 0 0 1 6 9 3 0 0 0 0 0 19 W 0 0 0 1 5 9 6 1 0 0 0 0 22 WNW 0 0 0 2 3 3 8 3 0 0 0 0 19 NW 0 0 0 2 0 6 19 3 0 0 0 0 30 NNW 0 0 0 1 3 9 46 16 0 0 0 0 75 TOTAL 1 0 4 32 49 137 229 73 4 0 0 0 529 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 529 TOTAL HOURS FOR THE PERIOD: 529 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS E FROM 10/ 1/05 0:00 TO 12/31/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 3 3 26 52 4 0 0 0 0 88 NNE 0 0 0 1 1 22 52 0 0 0 0 0 76 NE 1 0 0 0 3 7 65 2 0 0 0 0 78 ENE 0 0 1 1 5 5 23 25 0 0 0 0 60 E 0 0 0 2 1 2 8 1 0 0 0 0 14 ESE 0 0 1 2 0 5 34 5 0 0 0 0 47 SE 0 0 1 0 1 9 24 1 0 0 0 0 36 SSE 0 0 0 0 3 13 15 1 0 0 0 0 32 S 0 0 1 0 4 9 21 3 0 0 0 0 38 SSW 0 0 1 1 1 9 2 0 0 0 0 0 14 SW 0 0 0 0 1 4 6 0 0 0 0 0 11 WSW 0 0 2 1 2 5 0 0 0 0 0 0 10 W 0 0 0 0 3 6 0 0 0 0 0 0 9 WNW 0 0 0 1 0 3 6 0 0 0 0 0 10 NW 0 0 1 0 1 8 2 0 0 0 0 0 12 NNW 0 0 0 0 a 2 23 1 0 0 0 0 27 TOTAL 1 0 8 12 30 135 333 43 0 0 0 0 562 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 562 TOTAL HOURS FOR THE PERIOD: 562 63

River Bend Station 2005 Regulatory Guide 1.21 4/1312006 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS F FROM 10/ 1/05 0:00 TO 12/31/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 0 0 6 16 0 0 0 0 0 22 NNE 0 0 0 0 1 11 38 0 0 0 0 0 50 NE 0 0 0 0 0 6 29 3 0 0 0 0 38 ENE 0 0 0 0 2 7 15 2 0 0 0 0 26 E 0 0 0 1 0 2 2 0 0 0 0 0 5 ESE 0 0 0 0 0 1 22 0 0 0 0 0 23 SE 0 0 0 0 0 2 18 0 0 0 0 0 20 SSE 0 0 0 1 2 5 7 0 0 0 0 0 15 S 0 0 0 0 0 3 3 0 0 0 0 0 6 SSW 0 0 0 0 1 2 2 0 0 0 0 0 5 SW 0 0 0 0 0 7 5 0 0 0 0 0 12 WSW 0 0 0 0 0 0 0 0 0 0 0 0 0.

W 0 0 0 0 0 3 1 0 0 0 0 0 4 WNW 0 0 0 1 0 9 6 0 0 0 0 0 16 NW 0 0 0 0 0 3 3 0 0 0 0 0 6 NNW 0 0 0 0 1 1 10 0 0 0 0 0 12 TOTAL 0 0 0 3 7 68 177 5 0 0 0 0 260 NUMBER OF CALMS: 0 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 260 TOTAL HOURS FOR THE PERIOD: 260 RIVER BEND STATION JOINT FREQUENCY TABLE STABILITY CLASS G FROM 10/ 1/05 0:00 TO 12/31/05 23:00 PRIMARY SENSORS - 150 FOOT WIND SPEED (METERS/SECOND)

WIND .22- .51- .76- 1.1- 1.6- 2.1- 3.1- 5.1- 7.1- 10.1- 13.1- >18 TOT.

DIR .50 .75 1.0 1.5 2.0 3.0 5.0 7.0 10.0 13.0 18.0 N 0 0 0 0 0 6 20 0 0 0 0 0 26 NNE 0 0 0 2 5 16 19 0 0 0 0 0 42 NE 0 0 0 0 4 13 33 0 0 0 0 0 50 ENE 0 0 0 0 1 5 5 0 0 0 0 0 11 E 1 0 0 1 2 11 5 0 0 0 0 0 20 ESE 0 0 1 1 2 3 17 0 0 0 0 0 24 SE 0 0 0 1 4 4 20 0 0 0 0 0 29 SSE 0 0 0 1 1 16 10 0 0 0 0 0 28 S 0 0 0 1 4 12 4 0 0 0 0 0 21 SSW 0 0 0 2 3 10 1 0 0 0 0 0 16 SW 0 1 0 2 3 0 0 0 0 0 0 0 6 WSW 0 1 0 1 0 11 3 0 0 0 0 0 16 W 0 0 1 1 0 22 14 0 0 0 0 0 38 WNW 0 0 1 0 0 25 15 0 0 0 0 0 41 NW 1 0 0 0 2 10 13 0 0 0 0 0 26 NNW 0 0 0 0 0 6 25 0 0 0 0 0 31 TOTAL 2 2 3 13 31 170 204 0 0 0 0 0 425 NUMBER OF CALMS: 1 NUMBER OF INVALID HOURS: 0 NUMBER OF VALID HOURS: 426 TOTAL HOURS FOR THE PERIOD: 426 64

River Bend Station 2005 Regulatory Guide 1.21 4/1312006 Table 7 Effluent and Waste Disposal Annual Report 2005 Year ATMOSPHERIC DISPERSION AND DEPOSITION RATES FOR THE MAXIMUM INDIVIDUAL DOSE CALCULATIONS Analysis Location Ground Level Mixed Mode (meters) Releases Releases Gamma air dose (3) and 994 m WNW (Containment) CHIIQ - 421.0 CHI/Q - 33.1 Beta Air Dose Maximum Receptor 994 m WNW CHI/Q - 421.0 CHI/Q - 33.1 Resident D/Q - 50.3 D/Q - 18.1 Garden Meat animal Immersion Milk animal 7,000 m WNW CHIIQ - 3.58 CHI/Q - .870 D/Q - 0.38 D/Q - .223 Other on-site Receptors 115 m ENE CHILQ - 5977.0 CHI/Q - 407.5 (6) D/Q - 529.7 D/Q - 46.9 275 mN CHIIQ - 1644.0 CHI/Q - 169.1 D/Q - 345.6 D/Q - 68.4 2500 SW CHIIQ - 34.45 CHI/Q - 4.65 I D/Q - 3.35 D/Q - 1.40 Notes:

(1) All CHI/Q = IO-' sec/m 3 (2) All D/Q = 10V mn2 (3) Maximum offsite location (property boundary) with highest CHI/Q (unoccupied).

(4) Maximum hypothetical occupied offsite location with highest CHIQ and D/Q.

(5) No milk animal within 5 miles radius, hypothetical location in worst sector.

(6) Other on-site receptors.

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