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Annual Radioactive Effluent Release Report, January Through December 2009
	ML100690065
Person / Time
Site:	Columbia
Issue date:	02/28/2010
From:	; Energy Northwest
To:	; Office of Nuclear Material Safety and Safeguards
References
	G02-10-032
	Download: ML100690065 (50)
	v • d • e

NORTH WEST Columbia Generating Station Annual Radioactive Effluent Release Report January through December 2009

REFERENCES:

10 CFR 50.36a(a)(2) 10 CFR 72.44(d)(3)

CGS Technical Specification 5.6.2 ISFSI Technical Specification 5.4.c Columbia Generating Station.

Annual Radioactive Effluent Release Report January through December 2009 Energy Northwest Submitted February 2010

Table of Contents

1.0 INTRODUCTION

..................................................................................... 1 2.0 LIQUID EFFLUENTS .............................................................................. 1 3.0 GASEOUS EFFLUENTS ...................................................................... 1 Gaseous Effluent Tables .............. ...... ................... 4 Table 3-0 10 CFR Part 50 Appendix I Dose Compliance ...................... 4 Table 3-1 Main Plant Vent Releases ........................... 5 Table 3-2 Turbine Building Releases ............................... 7 Table 3-3 Radwaste Building Releases ......................... 9 Table 3-4 Summation of Releases ............................ 11 Table 3-5 Gaseous Purges and Vents ......................... 12 Table 3-6 Lower Limits of Detection ........................... 13 4.0 SOLID RADW ASTE ............................................................................... 14 Solid Radwaste Information required by the Offsite Dose Calculation Manual. 14 C lass A .......................................................... ........................... 14 C lass B ................................................................................ 15 C lass C .......................................................................................... 15 Solid Radwaste Information required by NRC Regulatory Guide 1.21 ........... 16 Solid waste shipped offsite for burial or disposal (not irradiated fuel) ..... ............ 16 Irradiated Fuel Shipments (Disposition) ................................................. 18 5.0 METEOROLOGICAL DATA ................................................................. 19 Joint Frequency Distribution Tables for 2009 ........................ 20 Table 5-1 1st Quarter Average, 33 Ft Above Ground Level AGL) ...... 20 Table 5-2 1st Quarter Average, 245 Ft AGL .................................... 22 Table 5-3 2nd Quarter Average, 33 Ft AGL ..................................... 24 Table 5-4 2nd Quarter Average, 245 Ft AGL ................................... 26 Table 5-5 3rd Quarter Average, 33 Ft AGL ........................................ 28 Table 5-6 3rd Quarter Average, 245 Ft AGL ......................... 30 Table 5-7 4th Quarter Average, 33 Ft AGL ...... ........... ...... 32 Table 5-8 4th Quarter Average, 245 Ft AGL.. ................... 34 Table 5-9 Year 2009, 33 Ft AGL ............................. 36 Table 5-10 Year 2009, 245 Ft AGL ................. ......... 38 Columbia Generating Station i 2009 Radioactive Effluent Report

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6.0 DOSE ASSESSMENT -- IMPACT ON MAN......................... 40 Dose Tables ............................................. .................................... 42 Table 6-1 Summary of Doses from Gaseous Effluents .............. 42 Table 6-2 50-Mile Population Dose from Gaseous Effluents ............... 45 7.0 REVISIONS TO THE ODCM ................................................................. 46 8.0 REVISIONS TO THE PROCESS CONTROL PROGRAM (PCP) .......... 46 9.0 NEW OR DELETED LOCATIONS FOR DOSE ASSESSMENTS AND/OR ENVIRONMENTAL MONITORING LOCATIONS .................. 46 10.0 MAJOR CHANGES TO RADIOACTIVE LIQUID, GASEOUS, AND SOLID WASTE TREATMENT SYSTEMS ................................................. 46 Columbia Generating Station ii 2009 Radioactive Effluent Report

1.0 Introduction This report has been prepared in compliance with 10 CFR 50.36a(a)(2), 10 CFR 72.44(d)(3), Independent Spent Fuel Storage Installation (ISFSI) Technical Specification 5.4.c, and Columbia Generating Station Technical Specification 5.6.2.

It includes a summary of the quantities of radioactive liquid and gaseous effluents and solid radwaste released from Columbia Generating Station during calendar year 2009. Effluent data is summarized on a quarterly basis.

2.0 Liquid Effluents No planned releases of contaminated liquids from the liquid radwaste processing system were discharged to the Columbia River from-Columbia Generating Station during calendar year 2009. The last planned discharge took place in 1998. There were no known releases of liquid effluents to ground or groundwater.

3.0 Gaseous Effluents The gaseous radwaste effluents from Columbia Generating Station were released from three (3) release points:

Main Plant Vent -- mixed mode release Turbine Building -- ground level release Radwaste Building -- ground level release The gaseous source terms from each release point are listed in Tables 3-1, 3-2, and 3-3. The activation gas argon-41 is included in these tables under fission gases to allow a match with the fission and activation gas totals of Table 3-4. Table 3-4 provides a summation of the total activity released, the average release rate, gross alpha radioactivity, and the estimated total error associated with the measurements of radioactivity in the gaseous effluents.

Radioactivity measurements for gaseous effluent releases are performed for fission and activation gases by collecting the samples in a Marinelli beaker and analyzing them using gamma spectroscopy. Air is analyzed for tritium by collection of water vapor on a desiccant with subsequent distillation and liquid scintillation counting.

Particulates and iodines are sampled continuously and the sample media (particulate filters and charcoal cartridges) are analyzed weekly using gamma spectroscopy. Each quarter a chemical separation process is used to isolate strontium from the composite particulate filters and quantification is accomplished with liquid scintillation detection. The average energy per disintegration of fission and activation gases is not included in this report as it is not required by Technical Specifications and is not used for gaseous effluent release rate limit calculations.

When a radioisotope is not positively identified at levels greater than the Minimum Detectable Activity (MDA), a value of zero is used for release concentrations and offsite dose assessments. Table 3-6 contains the Lower Limit of Detection (LLD) values corresponding to the sampling methods and analytical instruments used for each principal radioisotope.

Columbia Generating Station I 2009 Radioactive Effluent Report

Dose calculations were performed for releases using the NRC GASPAR II computer program and parameters as defined in the Offsite Dose Calculation Manual (ODCM). Desert sigmas were not used in gaseous plume growth calculations. Throughout this report, the term 'dose' is used as defined in NRC Regulatory Guide 1.109-1977. Quarterly and annual doses to the potentially highest-exposed Member of the Public at and beyond the site boundary were calculated. In addition, quarterly and annual doses were calculated at actual resident locations identified in the annual land use census. ODCM limits are based on Part 20 and Appendix I to Part 50 of Title 10 of the Code of Federal Regulations.

The threshold for air dose applies to fission and activation gases and is ten (10) millirad for beta and five (5) millirad for gamma quarterly and twenty (20) millirad for beta and ten (10) millirad for gamma annually. The threshold for organ dose applies to iodine, tritium, and particulates with half-lives greater than eight days and is seven and a half (7.5) millirem quarterly and fifteen (15) millirem annually. For fission and activation gases the dose rate limits are less than or equal to 500 mrem per year to the whole body and less than or equal to 3000 mrem per year to the skin. For iodines, particulates, and tritium the dose rate limit is less than or equal to 1500 mrem/year to any organ.

Dose calculations were also conducted for Members of the Public within the site boundary. The results are discussed and tabulated in Section 6.0.

It is estimated that approximately 3.25E-03 Curies of tritium were released through unmonitored vents of the, heating steam system within and outside the main power block (Turbine, Radwaste, Reactor,. and General Services buildings).

No additional spent fuel storage containers (SFSC) were added to the ISFSI facility in calendar year 2009. A total of twenty seven (27) SFSCs were in place in the ISFSI facility at the end of 2009. All SFSCs are Operable and as such are performing as designed. Based on ISFSI Technical Specification 3.1.1, there are no effluents from this facility. There were twelve SFSCs loaded in 2008 that are considered Operable but nonconforming based on communication with the vendor.

22. 2009 Radioactive Effluent Report Columbia Generating Station Station 2009 Radioactive Effluent Report

Incidents of effluent monitor inoperability greater than 30 days:

During an electrical maintenance and refueling outage in 2009, a large number of effluent monitors were taken out of service. All the monitors were returned to service in about five days except the reactor building effluent monitor. This monitor remained out of service for about 40 days following discovery that the inverter and batteries in the uninterruptible power supply needed to be replaced.

The United States National Council on Radiation Protection published Report #160 in 2009 which can serve to put radiation dose into perspective for the reader of this report. It was determined that the average dose to an individual is 620 mrem/yr. Of this, -50% is attributed to natural sources (radiation from gaseous radon, cosmic or space radiation, natural radioactive material in the ground, and natural radioactive materials in our bodies). About 48% is attributed to diagnostic and therapeutic medical exposure. Radiation dose from nuclear power was grouped into a category comprising <0.1% of the total.

33 2009 Radioactive Effluent Report Generating Station Columbia Generating Station 2009 Radioactive Effluent Report

Gaseous Effluent Tables Table 3-0 10 CFR Part 50 Appendix I Dose Compliance Report Period: January -- December 2009 I 1st Quarter 12nd Quarter1 3rd Quarter I 4th Quarter I Year*

Noble Gas Gamma Air Dose (mrad) 1.24E-02 2.27E-03 1.41E-03 5.35E-03 1.54E-02 ODCMLimit 5 5 5 5 10

% of Limit 2.48E-01 4.54E-02 2.82E-02 1.07E-01 1.54E-01 Beta Air Dose (mrad) 4.57E-03 8.40E-04 4.99E-04 2.1OE-03 5.83E-03 ODCM Limit 10 10 10 10 20

% of Limit 4.57E-02 8.40E-03 4.99E-03 2.1OE-02 2.92E-02 Iodine-131, Iodine-133, Tritium, and Particulates with half-lives greater than eight days.

Organ Dose (mrem) 1.36E-02 3.06E-03 1.79E-03 6.08E-03 1.84E-02 ODCM Limit 7.5 7.5 7.5 7.5 15

% of Limit 1.82E-01 4.07E-02 2.39E-02 8.1 1E-02 1.22E-01

Calculated quarterly doses cannot be directly compared to the annual doses.

Each above listed quarterly dose is the highest calculated dose based on a number of variables. Variables that make comparison difficult include location, meteorological data (quarterly joint frequency distribution (JFD) tables vs. annual JFD tables), receptor age, target organ, and characteristics of the emitted radionuclides.

Columbia Generating Station 4 2009 Radioactive Effluent Report

Table 3-1 Main Plant Vent Releases Fission Gases and lodines Report Period: January -- December 2009 1 st 2nd 3rd 4th Quarter Quarter Quarter Quarter Year Nuclides Released (Ci) (Cii) (C) (Ci) (Ci)

A. Fission gases krypton-85 <MDA <MDA <MDA <MDA <MDA krypton-85m 1.39E+00 <MDA <MDA <MDA 1.39E+00 krypton-87 <MDA <MDA <MDA <MDA <MDA krypton-88 <MDA <MDA <MDA <MDA <MDA xenon-133 <MDA <MDA <MDA <MDA <MDA xenon- 133 m <MDA <MDA <MDA <MDA <MDA xenon-135 3.27E+00 1.04E+00 2.32E-02 3.36E+00 7.70E+00 xenon-135m <MDA <MDA <MDA <MDA <MDA xenon-138 <MDA <MDA <MDA <MDA <MDA Others argon-41 4.81E+01 1.1 1E+01 5.77E+00 1.58E+01 8.08E+01 Total for period

5.28E+O1 1.22E+01 5.79E+00 1.92E+01 8.99E+O1 B. lodines iodine-131 4.43E-06 5.46E-07 2.55E-06 2.16E-06 9.69E-06 iodine-132 <MDA <MDA <MDA <MDA <MDA iodine-133 1.61E-05 <MDA <MDA <MDA 1.61E-05 iodine-134 <MDA <MDA <MDA <MDA <MDA iodine-135 <MDA <MDA <MDA <MDA <MDA Total for period

2.05E-05 5.46E-07 2.55E-06 2.16E-06 2.57E-05 MDA = Less than the "a posteriori" minimal detectable activity (microcuries per unit mass or volume).

MDA values are not included in the totals.

Colurnbia Generating Station 5 2009 Radioactive Effluent Report

Table 3-1 Main Plant Vent Releases (Continued)

Particulates and Tritium Report Period: January -- December 2009 1st 2nd 3rd 4th Quarter Quarter Quarter Quarter Year Nuclides Released (Ci) (Ci) (Ci) (Ci) (Ci)

C. Particulates strontium-89 <MDA <MDA 8.27E-08 1.30E-06 1.39E-06 strontium-90 <MDA <MDA 3.96E-07 <MDA 3.96E-07 cesium-1 34 <MDA <MDA <MDA <MDA <MDA cesium-1 37 2.60E-06 <MDA <MDA <MDA 2.60E-06 barium-lanthanum-140 <MDA <MDA <MDA <MDA <MDA silver-I1Oim <MDA <MDA <MDA <MDA <MDA cerium-141 <MDA <MDA <MDA <MDA <MDA cerium- 144 <MDA <MDA <MDA <MDA <MDA cobalt-58 3.26E-06 1.65E-05 <MDA <MDA 1.98E-05 cobalt-60 2.54E-05 1.06E-04 1.85E-05 6.71E-06 1.57E-04 iron-59 <MDA <MDA <MDA <MDA <MDA manganese-54 <MDA 1.83E-05 8.59E-07 <MDA 1.92E-05 zinc-65 1.93E-05 7.60E-05 4.37E-05 2.OOE-06 1.41E-04 chrome-51 <MDA 4.75E-05 <MDA <MDA 4.75E-05 antimony-125 <MDA <MDA <MDA <MDA <MDA Total for period* 5.06E-05 2.65E-04 6.36E-05 1.00E-05 3.89E-04 Others with T 1/2 < 8 days arsenic-76 <MDA <MDA <MDA <MDA <MDA bromine-82 <MDA <MDA <MDA <MDA <MDA copper-64 <MDA <MDA <MDA <MDA <MDA molybdenum-99 <MDA <MDA <MDA <MDA <MDA rhenium- 188 <MDA <MDA <MDA <MDA <MDA sodium-24 <MDA <MDA <MDA <MDA <MDA technetium-99m <MDA <MDA <MDA <MDA <MDA zinc-69m <MDA <MDA <MDA <MDA <MDA Total with T 1/2 < 8 days* O.OOE+00 O.OOE+00 0.00E+00 0.OOE+00 0.00E+00 D. Tritium

.tr-itium 34E-4... _3.55E-- i '35E-1i 487E-01 1.71E+°O MDA = Less than the "a posteriori" minimal detectable activity (microcuries per unit mass or volume).

MDA values are not included in the totals.

Columbia Generating Station 6 2009 Radioactive Effluent Report

Table. 3-2 Turbine Building Releases Fission Gases and lodines Report Period: January -- December 2009 1St. 2nd 3rd 4th Quarter Quarter Quarter Quarter Year Nuclides Released (Ci) (Ci) (Ci) (Ci) (Ci)

A. Fission gases krypton-85 <MDA <MDA <MDA <MDA <MDA krypton-85m <MDA <MDA <MDA <MDA <MDA krypton-87 <MDA <MDA <MDA <MDA <MDA krypton-88 <MDA <MDA <MDA <MDA <MDA xenon-133 <MDA <MDA <MDA <MDA <MDA xenon-133m <MDA. <MDA <MDA <MDA <MDA

.xenon-135 <MDA <MDA <MDA <MDA <MDA xenon-135m <MDA <MDA <MDA <MDA <MDA xenon-138 <MDA <MDA <MDA <MDA <MDA Others argon-41 <MDA <MDA <MDA <MDA <MDA Total for period

O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 B. lodines iodine-131 4.26E-05 4.13E-05 <MDA <MDA *8.39E-05 iodine-132 <MDA <MDA <MDA <MDA <MDA iodine-133 1.11E-04 5.66E-05 <MDA <MDA 1.68E-04 iodine-134 <MDA <MDA <MDA <MDA <MDA iodine-135 <MDA <MDA <MDA <MDA <MDA Total for period

1.54E-04 9.79E-05 O.OOE+00 O.OOE+00 2.52E-04 MDA = Less than the "a posteriori" minimal detectable activity (microcuries per unit mass or volume).

MDA values are not included in the totals.

Columbia Generating Station 7 2009 Radioactive Effluent Report

Table 3-2 Turbine Building Releases (Continued)

Particulates and Tritium Report Period: January.-- December 2009 1 -1st 2nd 3rd 4th Quarter Quarter Quarter Quarter Year Nuclides Released (Ci) (Ci) (Ci) (Ci) (Ci)

C. Particulates strontium-89 1.8 1E-05 2.40E-06 5.91E-06 9.86E-06 3.63E-05 strontium-90 <MDA 1.17E-06 <MDA <MDA 1.17E-06 cesium-134 <MDA <MDA <MDA <MDA <MDA cesium-1 37 <MDA <MDA <MDA <MDA <MDA barium-lanthanum-140 <MDA <MDA <MDA <MDA <MDA cerium- 141 <MDA <MDA <MDA <MDA <MDA cerium- 144 <MDA <MDA <MDA <MDA <MDA cobalt-58 <MDA <MDA <MDA <MDA <MDA cobalt-60 <MDA 2.22E-05 1.93E-05 <MDA 4.15E-05 iron-59 <MDA <MDA <MDA <MDA <MDA manganese-54 <MDA <MDA <MDA <MDA <MDA zinc-65 <MDA 8.09E-06 <MDA <MDA 8.09E-06 chrome-51 <MDA <MDA <MDA <MDA <MDA Total for period* 1.8 IE-05 3.39E-05 2.52E-05 9.86E-06 8.70E-05 Others with T 1/2 < 8 days molybdenum-99 <MDA <MDA. <MDA <MDA <MDA Total with T 1/2 < 8 days* 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.00E+00 D. Tritium tritium 6.36E+00 I 4.15E+00 I 1.80E+00I 5.85E+00 1 1.82E+0 17 MDA = Less than the "a posteriori" minimal detectable activity (microcuries per unit mass or volume).

MDA values are not included in the totals.

Columbia Generating Station 8 2009 Radioactive Effluent Report

Table 3-3 Radwaste Building Releases Fission Gases and lodines Report Period: January -- December 2009 I1st 2nd 3rd Q4t Quarter Quarter Quarter Quarter Year Nuclides Released (Ci) (Ci) (Ci) (Ci) (Ci)

A. Fission gases krypton-85 <MDA <MDA <MDA <MDA <MDA krypton-85m <MDA <MDA <MDA <MDA <MDA krypton-87 <MDA <MDA <MDA <MDA <MDA krypton-88 <MDA <MDA <MDA <MDA <MDA xenon-133 <MDA <MDA <MDA <MDA <MDA xenon-133m <MDA <MDA <MDA <MDA <MDA xenon-135 <MDA <MDA <MDA <MDA <MDA xenon-135m <MDA <MDA <MDA <MDA <MDA xenon-138 <MDA <MDA <MDA <MDA <MDA Others argon-41 <MDA <MDA <MDA <MDA <MDA Total for period* 0.00E+00 O.OOE+00 O.OOE+00 0.OOE+00 O.OOE+00 B. Iodines iodine-131 5.69E-07 <MDA <MDA <MDA 5.69E-07 iodine-132 <MDA <MDA <MDA <MDA <MDA iodine-133 <MDA <MDA <MDA <MDA <MDA iodine-134 <MDA <MDA <MDA <MDA <MDA iodine- 135 <MDA <MDA <MDA <MDA <MDA Total for period

5.6§9E-07 O.OOE+00 O.OOE+00 O.OOE+00 5.69E-07 MDA = Less than the "a posteriori" minimal detectable activity (microcuries per unit mass or volume).

MDA values are not included in the totals.

99 2009 Radioactive Effluent Report Generating Station Columbia Generating Station 2009 Radioactive Effluent Report

Table 3-3 Radwaste Building Releases (Continued)

Particulates and Tritium Report Period: January -- December 2009 _

1st 2nd 1 rd 4th Quarter Quarter Quarter Quarter Year Nuclides Released (Ci) (Ci) (Ci) (Ci) (Ci)

C. Particulates strontium-89 3.60E-07 1.97E-07 1.05E-06 2.32E-07 1.84E-06 strontium-90 <MDA <MDA <MDA <MDA <MDA cesium-1 34 <MDA <MDA <MDA <MDA <MDA cesium-1 37 <MDA <MDA <MDA <MDA <MDA barium-1 anthanum-1 40 <MDA <MDA <MDA <MDA <MDA cerium-141 <MDA <MDA <MDA <MDA <MDA cerium- 144 <MDA <MDA <MDA <MDA <MDA cobalt-58 <MDA <MDA <MDA <MDA <MDA cobalt-60 <MDA <MDA 5.04E-07 4.29E-07 9.33E-07 iron-59 <MDA <MDA <MDA <MDA <MDA manganese-54 <MDA <MDA <MDA <MDA <MDA zinc-65 <MDA <MDA <MDA <MDA <MDA Total for period* 3.60E-07 1.97E-07 1.55E-06 6.60E-07 2.77E-06 Others with T 1/2 < 8 days molybdenum-99 <MDA <MDA <MDA <MDA <MDA Tjotal with T 1/2 < 8 days* 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 D. Tritium tritium 8.43E-02 6.43E-02 5.38E-02 6.95E-02 2.72E-01 MDA = Less than the "a posteriori" minimal detectable activity (microcuries per unit mass or volume).

MDA values are not included in the totals.

Columbia Generating Station 10 2009 Radioactive Effluent Report

Table 3-4 Summation of Releases Gaseous Effluents Report Period: January -- December 2009 i Est 1st 2nd 3rd 4th Total Quarter Quarter Quarter. Quarter Year %Error A. Fission and activation gases Total release (Ci) 5.28E+01 1.22E+01 5.79E+00 1.92E+01 8.99E+01 4.30E+01 Average release rate (pCi/s) 6.71E+00: 1.55E+00 7.36E-01 2.44E+00 2.86E+00 Percent of ODCM limit (%) ,1.OOE-02 1.76E-03 1.08E-03 4.08E-03 4.08E-03 B. lodines Total 1-131 (Ci) 4.76E-05 4.19E-05 2.55E-06 2.16E-06 9.42E-05_ 4.60E+01 Average release rate (pCi/s) 6.05E-06 5.33E-06 3.24E-07 2.75E-07 2.99E-06 Percent of ODCM limit (%) 6.96E-06 3.53E-06 2.87E-07 3.23E-07 2.35E-06 C. Particulates Particulates with half-lives

>8 days (Ci) 6.90E-05 2.99E-04 9.03E-05 2.05E-05 4.79E-04 4.50E+01 Average release rate (pCi/s) 8.78E-06 3.80E-05 1.15E-05 2.61E-06 1.52E-05 Percent of ODCM limit (%) 1.97E-06 6.22E-06 2.50E-06 1.02E-06 3.23F-06 Gross alpha radioactivity (Ci) 1.10E-06 4.09E-06 1.43E-06 7.74E-07 7.40E-06 7.30E+01 D. Tritium

[ Total release (Ci) 6.88E-+0O 4.57E+00 2.29E+00 I6.40E+00 2.01E+01 2.60E+01 I Average release rate (pCi/s)I 8.75E-01, 15.81 E-01 1 2.91 E-01 I 8.14E-01 I 6.40E-01 Percent of ODCM limit (%) I7.68E-05 3.37E-05 j 1.03E-05 3.33E-05 2.11E-05 MDA = Less than the "a posteriori" minimal detectable activity (microcuries per unit mass or volume).

ODCM release rate limits are based on dose rate. For fission and activation gases the dose rate limits are less than or equal to 500 mrem/year to the whole body and less than or equal to 3000 mrem/year to the skin. For 1-131, particulates, and tritium the dose rate limit is less than or equal to 1500 mrem/year to any organ.

The ODCM dose factors and the highest site boundary dispersion value for each period were used in the calculation.

Measurement errors are sample-specific. The values reported represent an approximate overall error. The major contributors of this error are measurements associated with sample volume and release point flow rates and estimates of plateout factors.

11 2009 Radioactive Effluent Report Generating Station Columbia Generating Station 11 2009 Radioactive Effluent Report

Table 3-5 Gaseous Purges and Vents Report Period: January -- December 2009 Total Maximum Minimum Mean Type Number Time (hr.) Time (hr.) Time (hr.) Time (hr.)

Purge 5.OOE+00 1.60E+02 4.08 E+O1 2.42E+01 3.20E+01 Vent 1.1OE+O1 2.12E+01 6.20E+00 7.33E-01 1.92E+00 Columbia Generating Station is a continuous release plant. All purges and vents are discharged through the Standby Gas Treatment System and released through the reactor building stack that is sampled and continuously monitored for radioactive gaseous waste.

Columbia Generating Station 12 2009 Radioactive Effluent Report

Table 3-6 Lower Limits of Detection Gaseous Effluents Report Period: January -- December 2009 Fission Gases Required LLDT Achieved Analysis Nuclide (pCi/cc) LLD (IJCi/cc) krypton-87 1.OOE-04 1.05E-08 krypton-88 1.OOE-04 1.29E-08 xenon-133 1.OOE-04 1.OOE-08 xenon-133m 1.OOE-04 3.25E-08 xenon-135 1.OOE-04 3.77E-09 xenon-138 1..OOE-04 4.48E-08 lodines iodine-131 1 1.00E-12 r 6.04E-14 iodine-133 1.OOE-10 1.28E-12 Particulates strontium-89 1.OOE-11 1.16E- 14 strontium-90 1.OOE-11 5.12E-15 cesium-134 1.OOE-11 5.11E-14 cesium-137 1.OOE-11 4.70E-14 molybdenum-99 1.OOE-11 9.12E-13 cerium-141 1.OOE-11 4.88E-14 cerium-144 1.OOE-11 1.97E-13 cobalt-58 1.OOE-11 4.44E-14 cobalt-60 1.OOE-11 7.86E-14 iron-59 1.OOE-11 1.07E-13 manganese-54 1.OOE-11 4.56E-14 zinc-65 1.OOE-11 1.01E-13 Gross Alpha 1.OOE-11 9.01E-16 Tritium hydrogen-3 1.OOE-06 5.85E-11 t From ODCM Table 6.2.2.1-1 Station Generating Station 13 2009 Radioactive Effluent Report Columbia Generating 13 2009 Radioactive Effluent Report

4.0 Solid Radwaste This section of the annual effluent report provides information required by both the Columbia Generating Station Offsite Dose Calculation Manual and by Nuclear Regulatory Commission Regulatory Guide 1.21-1974.

Solid Radwaste Information requiredby the Offsite Dose CalculationManual January -- December 2009 Class A

1. Container Volumes 5 GAL PAIL 1 ft3 8GALDRUM 1.6 ft3 30 GAL DRUM 4.0 ft3 55 GAL DRUM 7.5 ft3 B-25 Steel Box 96 ft3 B-88 Steel Box 109 ft3 EL-142 Polyethylene HIC 132.4 ft3 B-25 Overpack Steel Box 138 ft3 ES-190 Steel Liner 170.2 ft3 14-170 WM Steel Liner 180.0 ft3

2. Total Curies 3.12E+02 Ci

3. Principal Radionuclides

.6 1i Co-60 1.27E +02 4.05E +01 Zn-65 9.32E+01 2.98E+01 Fe-55 5.04E+01 1.61E+01 Mn-54 1.48E+01 4.75E + 00 Ni-63 1.29E1+01 4.14E + 00 Co-58 5.88E+00 ..........

188E:00 C-14 3.44E +00 1.10E1+00 Cr-51 2.29E+00 7.33E-01 Cs-137 8.52E-01 2.73E701 Ag-110m 6.85E-01 2.19E-01 Ni-59 4.21E-01 1.35E-01 Columbia Generating Station 14 2009 Radioactive Effluent Report

Fe-59 2.77E-01 8.87E-02 Nb-95 1.06E-01 3.39E-02 Sr-89 1.03E-01 3.28E-02 H-3 8.65E-02 2.77E-02 Zr-95 6.95E-02 2.22E-02 La-140 6.18E-02 1.98E-02 Ba-140 5.84E-02 1.87E-02 Sb-124 5.70E-02 1.82E-02 1-131 4.70E-02 1.50E-02 Sb-125 3.76E-02 1.20E-02 Sr-90 2.59E-02 8.29E-03 Pu-241 4.26E-03 1.36E-03

4. Source Resins 3.07E+02 Ci DAW 5.05E+00 Ci Irradiated Components O.OOE+00 Ci Other (Sealed Source & Mixed Waste) 2.58E-03 Ci

5. Type of Container All containers shipped as Limited Quantity, LSA, SCO or Radioactive material in IP-1, 'IP-2,Type A, or Type B (including casks) as appropriate.

6. Solidification Agent None Class B There were no Class B shipments made during calendar year 2009 Class C There were no Class C shipments made during calendar year 2009 Columbia Generating Station 15 2009 Radioactive Effluent Report

Solid Radwaste Information requiredby NRC Regulatory Guide 1.21 January -- December 2009 Solid waste shipped offsite for burial or disposal (not irradiated fuel).

1. Type of Waste Annual Est. Total Waste Stream Unit Cumulative Error %

a. Spent resins, filter sludge, m3 2.04E+02 evaporator bottoms, etc. Ci 3.07E+02 2.5E+01%

b. Dry Active Waste m3 2.56E+02 Ci 5.05E+00 2.5E+01%

c. Irradiated Components m3 0.OOE+00 Ci O.OOE+00 None

d. Other Waste (Sealed Source & m3 7.11E-01 mixed waste) Ci 2.57E-03 2.5E+01%

2. Estimate of major nuclide composition (by type of waste)

a. Dewaterec S ent Resins -- All lasses Pre Co-60 1.25E+02 4.07E+01 Zn-65 9.18E+01 2.98E+01 Fe-55 5.03E+01 1.63E+01 Mn-54 1.47E+01 4.77E+00 Ni-63 1.29E+01 4.21E+00 Co-58 5.21E+00 1.69E+00 C-14 3.44E+00 1.12E+00 Cr-51 1.38E+00 4.47E-01 Cs-137 7.96E-01 2.59E-01 Ag-110m 6.66E-01 2.16E-01 Ni-59 4.21E-01 1.37E-01 Fe-59 2.77E-01 8.99E-02

.Sr-i89 . 8.. 78E-02. 2.85E-02 H-3 8.46E-02 2.75E-02 Nb-95 6.61E-02 2.15E-02 La-140 6.18E-02 2.01E-02 Ba-140 5.84E-02 1.90E-02 1-131 4.70E-02 1.53E-02 Station Generating Station 16 2009 Radioactive Effluent Report Columbia Generating 16 2009 Radioactive Effluent Report

b. Dry Active Waste (DAW) -- All Classes Co-60 1.63E+00 3.23E+01 Zn-65 1.35E+00 2.67E + 01 Cr-51 9.1OE-01 1.80E+01 Co-58 6.73E-01 1.33E+01 Mn-54 1.41E-01 2.79E+00 Fe-55 9.53E-02 1.89E+00 Cs-137 5.61E-02 1.11E+00 Zr-95 4.08E-02 8.08E-01 Nb-95 3.98E-02 7.88E-01 Sb-125 3.58E-02 7.1OE-01 Ni-63 2.97E-02 5.88E-01 Ag-110m 1.88E-02 3.72E-01 Sr-89 1.47E-02 2.90E-01 Sb-124 1.36E-02 2.69E-01 H-3 1.94E-03 3.84E-02 C-14 8.06E-04 1.60E-02 Sr-90 3.16E-04 6.26E-03 Am-241 3.20E-05 6.33E-04 C. Irradiated Components None

d. Other Waste (Sealed Source & Mixed Waste)

Co-60 2.29E-03 8.89E+01 Fe-55 1.34E-04 5.19E+00 Zn-65 8.54E-05 3.32E+00 Ni-63 4.17E-05 1.62E + 00 Sr-89 1.95E-05 7.58E-01 H-3 2.67E-06 1.04E-01 Mn-54 1. 18E-06 4.60E-02 C-14 1.14E-06 4.43E-02 Columbia Generating Station 17 2009 Radioactive Effluent Report

3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 31 Tractor - Trailer US Ecology, Inc.

via Public Highway P.O. Box 638 Hanford Reservation Richland, WA. 99352 1* Tractor - Trailer Perma-Fix of Fla via Public Highway 1940 N.W. 67th P1 Gainesville, FL 32653

(* After processing portions of this shipment may be forwarded for disposal.)

Irradiated Fuel Shipments (Disposition)

Number of Shipments Mode of Transportation Destination None N/A N/A Columbia Generating Station 18 2009 Radioactive Effluent Report

5.0 Meteorological Data The meteorological data contained in Tables 5-1 through 5-10 was obtained from the meteorological tower located 2500 feet (762 m) west of Columbia Generating Station. Data was recovered from instruments at the 33-foot (10 meter) and 245- foot (75 meter) levels.

The meteorological data is a composite file generated from the automated data recovery systems for the calendar year 2009. Data is archived on the Energy Northwest Local Area Network.

Joint data recovery for 2009 was 91.1% from the 33-foot level and 97.4% from the 245-foot level. Redundant wind and temperature sensors are installed at both levels of the meteorological tower. Data from the twosystems is mixed to permit maximum data recovery for defined date ranges.

The data in Tables 5-1 through 5-8 lists the joint frequency distributions at the 33- foot and 245-foot levels by quarter for 2009. These tables show the total hours at various wind speeds for each sector and stability class. The NRC stability classes A through G and eleven wind speed categories along with the 16 wind direction sectors were used to prepare each joint frequency table. Table 5-9 and 5-10 list the annual joint frequency distributions for those levels for 2009.

Wind speed is measured in miles per hour in the following tables and speeds below 1.0MPH were recorded as calms.

Atmospheric factors which affect dispersion and deposition of gaseous effluents as measured or documented at the Hanford Meteorological Station were snow (13.9 inches total which fell in January, February, and December), total precipitation (5.47 inches), dust or blowing dust (3 days), fog (42 days), and thunderstorms (3 days). No atmospheric smoke was noted on the Hanford Site in 2009.

Rainfall as recorded at the Columbia Generating Station meteorological tower was 3.13 inches.

Columbia. Generating Station 19 2009 Radioactive Effluent Report

Joint Frequency Distribution Tables for 2009 Table 5-1 1st Quarter Average, 33 Ft Above Ground Level AGL)

Joint Frequency Distribution (version 4.0)

Sensor Criteria Time Frame Data Recovery Rate Wind Speed: 33 Foot Sensors Starting Date: 1/1/2009 Maximum Hours In Period: 2160 Wind Direction: 33 Foot Sensors Ending Date: 3/31/2009 Hours Missing: 31.

Delta T: 245 Foot - 33 Foot Sensors Hours Used: ' 2129 Signal Path: MET B Recovery Rate: 98.6%

Processing: Instantaneous Wind Speed STABILITY CLASS: A Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2.2 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4.5 7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6.7 9 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 2 8.9 11 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11.2 13 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 13.4 18 0 0 0 0 0 0 0 0 0 0 0 0 0. 0 0 0 0 17.9 22 0 0 0 0 0 .0 0 0 0 0 0 0 0 0 0. 0 0 22.4 29 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 2 29.1 40 0 0 0 0 0 0 0 0 0 0 1 0 1 1 1 0 4 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 0 1 0 0 0 0 0 0 0 1 1 0 1 3 1 0 8 Wind Speed STABILITY CLASS: B Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2.2 5 1 3 1 0 0 0 0 0 0 0 1 0 0 0 0 0 6 4.5 7 0 2 1 0 0.0 0 0 0 0 0 0 1 0 0 0 4 6.7 9 3 1 2 0 0 0 0 0 0 b 0 0 0 0 0 0 6.

8.9 11 0 0 0 0 0. 0 0 0 0 0 0 0 0 0 0 0 0 11.2 13 0 1.0 0 0 0 0 '0 0 0 0 0 0 0.0 0 1 13.4 -18 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 17.9 22 0 0 0 0 0 0 0 0 0 2 3 0 0 0 0 0 5 22.4 29 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 3 29.1 40 0 0 0 0 0 0 0 0 0 .0 1 0 0 0 0 0 1 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 5 7 4 0 0. 0 0 0 0 2 6 1 2 1 0 0 28 Wind Speed STABILITY CLASS: C Min Max .N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 4 2.2 5 3 2 0 0 0 0 0 0 0 1 0 0 0 0 0 1 7 4.5 7 1 6 5 1 0 0 0 0 0 0 0 0 0 0 0 0 13 6.7 9 2 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 3 8.9 11 2 0 1 0 0 0 0 0 0 0 0 0 .0 0 0 0 3 11.2 13 0 1 0 0 0 0 0 0 0 2 0 0 0 0 0 0 3 13.4 18 2 0 0 0 0 0 0 0 0 2 3 0 0 0 2 2 11 17.9 22 0 0 0 0 0 0 0 0 0 2 1 1 1 0 2 0 7 22.4 29 0 .0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 29.1 40 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 2 40.3 900 0 0 00 0- 0 0 0 0- 0 0 0 0 -0 0 0 TOTALS 11 10 8 2 0 0 0 0 0 7 5 2 1 0 5 3 54 Wind Speed .STABILITY CLASS: D Min Max N NNE NE ENE _E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1.2. 5. 8 9-

.... -7 1...6 2- . 4.. 2. -- 1. ... 3 - 15 ..6 2.2 5 25 14 11 2 2 0 6 8 9 9, 5 5 5 12 28 50 191 4.5 7 31 9 6 0 0 0 0 9 10 13 2 3 6 7 27 41 164 6.7 9 14 5 1 0 0 0 3 12 13 11 2 1 2 5 11 34 114 8.9 11 5 0 1 0 0 0 1 6 7 13 3 1 1 4 9 13 64 11.2 13 2 0 0 0 0 0 0 0 9 12 3 0 1 1 6 3 37 13.4 18 1 0 0 0 0 0 0 3 3 11 6 4 3 1 2 9 43 17.9 22 0 0 0 0 0 0 0 0 0 7 6 2 1 1 1 0 18 22.4 29 0 0 *0 0 0 0 0 0 0 4 3 1 1 2 3 0 14 29.1 40 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 2 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 83 36 28 9 3 6 12 42 55 83 31 20.21 36 93 165 723 Columbia Generating Station 20 2009 Radioactive Effluent Report

Table 5-1 1st Quarter Average, 33 Ft AGL (Continued)

Wind Speed STABILITY CLASS: E Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2 4 5 3 4 I 1 3 1 4 5 *0 3 6 8 8 6 62 2.2 5 30 .7 8 3 0 0 3 5 14 12 3 6 8 10 21 37 167 4.5. 7 6 5 8 2 0 0 3 8 13 6 5 7 2 1 33 23 122 6.7 9 4 0 0 3 0 0 3 10 11 6 4 5 5 6 18 6 81 8.9 11 0 0 1 0 0 0 1 8 14 8 8 3 3 10 16 8 80 11.2 13 0 0 1 0 0 0 0 6 3 14 5 0 1 2 1 4 37 13.4 18 0 0 0 0 0 0 0 4 4 17 12 3 1 5 6 2 54 17.9 22 0 0 0 0 0 0 0 0 0 14 7 1 0 5 4 0 31 22.4 29 0 0 0 0 0 0 0 0 0 6 6 3 0 0 0 0 15 29.1 40 0 0 0 0 0 0 0 0 0 0 2 0. 0 0 0 0 2 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 *0 0 0 0 TOTALS 44 17 21 12 1 1 13 42 63 88 52 31 26 47 107 86 651 Wind Speed STABILITY CLASS: F Min Max. N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2 4 4 6 1 2 0 0 4 4 2 2 6 5 4 15 12 71 2.2 5 16 5 4 0 0 0 2 3 10 10 6 2 3 6 13 18 98 4.5 7 5 8 4 3 0 0 1 5 13 9 2 5 2 3 8 10 78 6.7 9 0 0 2 1 0 0 0 4 13 5 3 0 2 7 5 3 45 8.9 11 2 0 1 0 0 0 1 6 11 3 2 1 1 3 7 2 40

.11.2 13 0 0 0 0 0 0 0 7 5 1 1 0 0 0 0 0 14 13.4 18 0 0 0 0 0 0 0 0 1 2 1 0 0 0 0. 0 4 17.9 22 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 22.4 29 0 0 0 0 0 0 0 0 *0 0 0 0 0 0 0 0 0 29.1 40 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 27 17 17 5 2 0 4 29 57 33 17 14 13 23 48 45 351 Wind Speed STABILITY CLASS: G Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2 10 2 1 0 0 0 2 1 3 4 1 2 0 2 8 13 49 2.2 5 6 1 1 0 0 0 2 5 6 5 2 2 0 2 7 18 57 4.5 7 1 .0 0 0 0 0 0 3 10 1 3 0 0 1 6 4 29 6.7 9 0 1 5 0 0 0 0 4 5 3 1 0 0 1 2 1 23 8.9 11 0 0 0 0 0 0 0 7 7 0 0 0 0 0 0 0 14 11.2 13 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 2 13.4 18 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 *0 17.9 22 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 22.4 29 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29.1 40 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 17 4 7 0 0 0 4 21 32 13 7 4 0. 6 23 36 174 Wind Speed STABILITY CLASS: ALL Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2 25 20 20 .13 4 7 7 10 15 13 4 14 12 17 36 46 263 2.2 5 81 32 25 5 2 0 13 21 39 37 17 15 16 30 69 124 526 4.5 7 44 30 24 6 0 0 4 25 46 29 .12 15 11 12 74 78 410 6.7 9 23 8 11 4 0 0 6 30 42 25 10 6 9 20 36 44 274 8.9 11 9 0 4 0 0 0 3 27 39 24 13 5 5 17 32 23 201 11.2 13 2 2 1 0 0 0 0 14 18 29 9 0 2 3 7 7 94 13.4 18 3 0 0 0 0 0 0 7 8 32 23 7 4 6 10 13 113 17.9 22 0 0 0 0 0 0 0 0 0 26 17 4 2 6 7 0 62 22.4 29 0 0 0 0 0 0 0 0 0 11 9 6 2 4 3 0 35 29.1 40 0 0 0 0 0 0 0 0 0 1 5 0 1 1 3 0 11 40.3 90 0 0 0 0 0 ,0 0 0 0 ,0 .0 0 0 0 0 0 0 TOTALS 187 92 85 28 6 7 33 134 207 227 119 72 64 116 277 335 1989 A B C D E F G TOTALS CALM 0 0 0 44 38 38 20 140 Occurrence of stability class on a percentage basis A. 0.4%

B 1.3%

C 2.5%

D 36.0%

E 32.4%

F 18.3%

G 9.1%

Columbia Generating Station 21 2009 Radioactive Effluent Report

Table 5-2 1st Quarter Average, 245 Ft AGL Joint Frequency Distribution (version 4.0)

Sensor Criteria Time Frame Data Recovery Rate Wind Speed: 245 Foot Sensors Starting Date: 1/1/2009 Maximum Hours In Period: 2160 Wind Direction: 245 Foot Sensors Ending Date: 3/31/2009 Hours Missing: 12 Delta T: 245 Foot - 33 Foot Sensors Hours Used: 2148 Signal Path: MET B Recovery Rate: 99.4%

Processing: Instantaneous Wind Speed STABILITY CLASS: A Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2.2 4.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4.5 6.7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6.7 8.9 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 8.9 11.2 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 11.2 13.4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 13.4 17.9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 17.9 22.4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 22.4 29.1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 29.1 40.3 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 0 3 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 2 TOTALSj 0 1 0 0 0 0 0 0 0 0 2 0 1 3 1 0 8 Wind Speed STABILITY CLASS: B Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2.2 4.5 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 4 4.5 6.7 1 0 1 0 0 0 0 0 0 0 0 1 1 0 0 0 4 6.7 8.9 2 2 1 0 0 0 0 0 0 0 0 0 0 .0 0 0 5 8.9 11.2 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 3 11.2 13.4 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 13.4 17.9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 17.9 22.4 0 0 0 0 0 0 0 0 0 1 4 0 0 0 0 0 5 22.4 29.1 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 2 29.1 40.3 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 0 3 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 4 6 5 1 0 0 0 0 0 2 5 2 2 1 0 0 28 Wind Speed STABILITY CLASS: C Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 2 2.2 4.5 1 0 2 1 0 0 0 0 0 0 0 0 0 0 0 1 5 4.5 6.7 2 3 6 0 0 0 0 0 0 0 0 0 0 0 0 1 12 6.7 8.9 1 2 1 1 0 0 0 0 0 1 0 0 0 0 0 0 6 8.9 11.2 3 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 5 11.2 13.4 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 13.4 17.9 1 1 0 0 0 0 0 0 0 2 0 0 0 0 2 3 9 17.9 22.4 0 0 0 0 0 0 0 0 0 0 5 1 1 0 1 0 8 22.4 29.1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 1 0 4 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 2 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 8 7 11 3 0 0 0 0 0 5 6 3 1 0 5 5 54 Wind Speed STABILITY CLASS: D Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 3 5 8 7 3 0 6 2 3 6 2 1 2 3 2 6 59 2.2 4.5 26 14 8 5 4 6 4 7 4 9 5 7 3 10 14 25 151 4.5 6.7 38 15 8 1 0 0 0 4 11 13 5 4 5 4 20 50 178 6.7 8.9 20 5 2 2 0 0 1 9 15 7 3 3 2 4 12 38 123 8.9 11.2 9 1 2 0 0 0 3 5 5 16 4 2 1 4 19 21 92 11.2 1 i'3o.4 6 0d 0 b 0d 0 0 - 1 5 1_2 4. 0. 2 '. 4 7

7. 6 4f 7

13.4 17.9 5 0 0 0 0 0 0 1 6 11 8 1 2 2 9 7 52 17.9 22.4 0 0 0 0 0 0 0 2 2 4 7 6 1 3 1 .2 28 22.4 29.1 0 0 0 0 0 0 0 0 0 5 5 2 2 2 2 0 18 29.1 40.3 0 0 0 0 0 0 0 0 0 1 2 2 0 0 3 0 8 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 107 40 28 15 7 6 14 31 51 84 45 28 20 36 89 155 756 Columbia Generating Station 22 2009 Radioactive Effluent Report

Table 5-2 1st Quarter Average, 245 Ft AGL (Continued)

Wind Speed STABILITY CLASS: E Min Max. N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 3 1 2 3 4 2 5 2 2 2 0 3 0 2 1 2 34 2.2 4.5 10 6 4 4 4 0 2 6 8 8 5 8 0 5 9 12 91 4.5 6.7 16 9 10 5 1 0 1 1 8 5 5 4 4 3 12 23 107 6.7 8.9 10 4 2 2 0 0 1 5 5 6 3 2 2 3 16 14 75 8.9 11.2 6 3 1 0 0 0 1 1 5 8 4*- 2 4 3 20 12 70 11.2 13.4 5 2 1 0 0 0 3 2 3 11 5 2 6 2 27 7 76 13.4 17.9 1 0 1 0 0 0 0 4 10 16 17 2 3 10 25 14 103 17.9 22.4 2 0 0 0 0 0 0 3 4 18 21 3 0 4 5 1 61 22.4 29.1 0 0 0 0 0 0 0 0 0 7 21 2 2 9 8 0 49 29.1 40.3 0 0 0 0 0 0 0 0 0 0 10 3 0 0 0 0 13 40.3 90 0 0 0 0 0 0 0 0 0 0 1 0. 0 0 0 0 1 TOTALS 53 25 21 14 9 2 13 24 45 81 92 31 21 41 123 85 680 Wind Speed STABILITY CLASS: F Min Max N NNE NE ENE 'E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 3 2 1 2 2 1 2 3 2 0 5 1 2 0 1 3 30 2.2 4.5 9 7 5 4 1 4 5 8 8 3 2 1 6 3 3 9 78 4.5 6.7 3 8 12 4 0 0 1 4 7 8 5 3 1 2 5 0 63 6.7 8.9 5 8 9 3 0 0 1 3 11 7 4 1 3 3 2 6 66 8.9 11.2 3 3 5 0 0 0 1 4 9 3 0 1 2 2 5 8 46 11.2 13.4 2 0 0 0 0 0 0 3 2 11 3 1 0 4 5 4 35 13.4 17.9 2 0 2 0 0 0 0 2 9 10 2 0 1 9 8 6 51 17.9 22.4 0 0 0 0 0 0 0 2 2 4 2 0 0 1 3 0 14 22.4 29.1 0 0 0 0 0 0 0 0 0 0 3 0 0 0 0 0 3 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 27 28 34 13 3 5 10 29 50 46 26 8 15 24 32 36 386 Wind Speed STABILITY CLASS: G Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 0 1 0 0 1 0 0 0 2 1 1 1 1 0 0 0 8 2.2 4.5 3 7 6 2 1 1 4 7 3 11 1 3 2 3 1 1 56 4.5 6.7 5 9 3 0 1 0 0 5 6 7 4 0 0 0 0 6 46 6.7 8.9 4 3 2 1 0 0 0 5 4 2 4 0 0 0 1 5 31 8.9 11.2 3 0 0 1 0 0 0 0 4 4 0 1 1 0 1 1 16 11.2 13.4 0 0 1 0 0 0 0 0 1 5 2 0 1 1 3 3 17 13.4 17.9 0 0 0 0 0 0 0 2 5 6 1 0 0 0 2 0 16 17.9 22.4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 15 20 12 4 3 1 4 19 25 36 13 5 5 4 9 16 191 Wind Speed STABILITY CLASS: ALL Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 9 11 11 13 10 3 13 7 9 9 8 6" 5 5 4 11 134 2.2 4.5 50 35 26 17 10 11 15 28 23 31 13 19 11 21 27 48 385 4.5 6.7 65 44 40 10 2 0 2 14 32 33 19 12 11 9 37 80 410 6.7 8.9 42 24 17 9 0 0 3 22 35 23 14 6 7 11 31 "63 307 8.9 11.2 24 9 12 1 0 0 5 10 23 31 8 6 "8 9 45 42 233 11.2. 13.4 13 3 2 0 0 0 3 6 11 40 14 3 9 11 42 20 177 13.4 17.9 9 1 3 0 0 0 0 9 30 45 28 3 6 21 46 30 231 17.9 22.4 2 0 0 0 0 0 0 7 8 27 39 10 2 8 11 3 117 22.4 29.1 0 0 0 0 0 0 0 0 0 14 31 5 5 11 11 0 77 29.1 40.3 0 0 0 0 0 0 0 0 0 1 14 7 1 2 4 0 29 40.3 90 0 0 0 0 0 0 0 0 0 0 1 0 0 1 1 0 3 TOTALS 214 127 111 50 22 14 41 103 171 254 189 77 65 109 259 297 2103 A .8 C 0 E F G TOTALS CALM 0 0 0 14 15 10 6 45 Occurrence of stability class on a percentage basis A 0.4%

B 1.3%

C 2.5%

D 35.8%

E 32.4%

F 18.4%

G 9.2%

Columbia Generating Station 23 2009 Radioactive Effluent Report

Table 5-3 2nd Quarter Average, 33 Ft AGL Joint Frequency Distribution (version 4.0)

Sensor Criteria Time Frame Data Recovery Rate Wind Speed: 33 Foot Sensors Starting Date: 4/1/2009 Maximum Hours In Period: 2184 Wind Direction: 33 Foot Sensors Ending Date: 6/30/2009 Hours Missing: 21 Delta T: 245 Foot - 33 Foot Sensors Hours Used: 2163 Signal Path: MET B Recovery Rate: 99.0%

Processing: Instantaneous Wind Speed STABILITY CLASS: A Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 0 3 1 2 0 0 0 0 0 0 0 0 0 0 0 0 6 2.2 4.5 0 2 3 2 4 2 0 0 0 0 0 0 0 0 0 0 13 4.5 6.7 3 9 7 0 1 1 2 0 0 0 0 0 0 0 0 0 23 6.7 8.9 6 9 2 0 0 0 1 1 3 0 0 0 0 0 0 0 22 8.9 11.2 1 10 0 0 0 0 2 0 0 3 0 1 0 1 0 0 18 11.2 .13.4 1 5 0 0 0 0 1 0 3 1 0 1 0 1 0 0 13 13.4 17.9 1 9 0 0 0 0 0 0 2 3 0 5 4 2 3 0 29 17.9 22.4 0 1 0 0 0 0 0 0 0 0 0 4 1 0 0 0 6 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 3 0 0 0 1 4 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 12 48 13 4 5 3 6 1 8 7 0 14 5 4 3 1 134

,Wind Speed STABILITY CLASS: B Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 3 3 0 0 0 2 2 0 .0 0 0 1 0 1 0 0 12 2.2 4.5 7 6 5 9 3 5 5 0 0 2 0 1 2 1 0 1 47 4.5 6.7 10 6 2 2 5 1 2 2 1 3 1 0 0 1 0 3 39 6.7 8.9 4 .5 1 3 0 0 2 2 9 3 0 1 0 0 3 0 33 8.9 11.2 0 0 1 3 1 0 3 1 6 4 1 1 0 1 1 0 23 11.2 13.4 2 0 1 0 0 0 2 1 1 0 3 1 3 2 0 3 19 13.4 17.9 0 2 0 0 0 0 2 1 0 2 3 1 3 i 3 1 19 17.9 22.4 0 1 0 0 0 0 0 0 0 1 0 1 1 0 1 0 5 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 2 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 26 23 10 17 9 8 18 7 17 15 8 8 9 7 9 8 199 Wind Speed STABILITY CLASS: C Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 4 1 1 0 2 3 0 0 1 0 0 1 1 3 2 2 21 2.2 4.5 4 3 2 3 3 10 8 5 1 3 0 3 2 4 5 3 59 4.5 6.7 6 3 4 2 1 0 7 11 7 9 3 1 4 2 2 9 71 6.7 8.9 7 2 2 5 0 0 2 3 7 7 1 6 1 *2 4 4 53 8.9 11.2 1 0 0 0 1 0 2 4 1 4 2 1 1 5 3 2 27 11.2 13.4 0 0 2 0 0 0 1 1 5 2 0 0 2 2 0 0 15

'13.4 17.9 1 3 0 0 0 0 0 0 1 1 0 3 2 2 4 1 18 17.9 22.4 0 0 0 0 0 0 0 0 0 0 2 0 1 0 0 0 3 22.4 29.1 0 0 0 .0 0 0 0 0 0 0 0 0 0 0 0 0 0 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 23 12 11 10 7 13 20 24 23 26 8 15 14 20 20 21 267 Wind Speed STABILITY CLASS: D Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 1 1 2 2 5 5 8 6 5 4 1 2 2 4 0 2 50 2.2 4.5 1 3 5. 4 6 5 10 22' 21 9 3 6 4 7 4. 3 -113 4.5 6.7 9 4 5 4 5 7 10 24 21 18 7 4 6 2 8 7 141 6.7 8.9 1 3 2 4 1 3 8 13 17 6 0 2 6 4 4 7 81 8.9 11.2 4 4 4 2 0 0 2 2 9 7 1 0 3 . 5 7 6 56 11.2 13.4 2 0 3 0 0 1 1 2 4 3 3 1 0 2 8 3 33 13.4 17.9 4 5 3 2 0 0 0 3 3 6 5 8 2 8 24 3 76 17;9 22.4 0 0 0 2 0 0 0 0 0 0 0 2 3 1 5 3 16 22.4 29.1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 3 0 4 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 22 20 24 20 17 21 39 72 80 53 21 25 26 33 63 34 570 Columbia Generating Station 24 2009 Radioactive Effluent Report

Table 5-3 2nd Quarter Average, 33 Ft AGL (Continued)

Wind Speed STABILITY CLASS: E Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 5 1 3 1 1 2 3 6 0 3 4 3 1 4 2 2 41 2.2 4.5 8 3 0 2 1 2 5 12 7 8 12 7 3 12 3 9 94 4.5 6.7 6 6 0 1 0 2 5 12 11 4 1 7 8 12 8 13 96 6.7 8.9 2 2 3 2 0 0 5 11 7 5 2 5 5 9 16 9 83 8.9 11.2 1 1 4 2 0 0 1 5 3 7 1 3 3 16 16 4 67 11.2 13.4 1 0 0 0 0 0 3 4 2 2 7 2 3 3 10 2 39 13.4 17.9 0 0 2 0 0 0 0 0 0 2 2 4 2 4 7 0 23 17.9 22.4 0 0 1 0 0 0 0 0 0 1 1 0 0 0 0 0 3 22.4 29.1 0 0 0 0 0 0 0 0 -0 0 1 0 0 0 0 0 1 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 .0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 23 13 13 8 2 6 22 50 30 32 31 31 25. 60 62 39 447 Wind Speed STABILITY CLASS: F Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 0 2 5 3 0 0 0 5 5 5 1 2 0 2 1 4 35 2.2 4.5 8 6 8 3 0 2 2 17 18 4 4 1 3 3 6 6 91 4.5 6.7 5 1 4 0 0 0 6 13 14 5 3 1 3 2 5 6 68 6.7 8.9 2 2 1 0 0 0 0 .5 8 4 1 2 2 4 3 3 37 8.9 11.2 0 0 0 0 0 0 0 0 7 3 1 0 0 5 2 0 18 11.2 13.4 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 2 13.4 17.9 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 17.9 22.4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90.0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0. 0 TOTALS 15 11 18 6 0 2 8 40 54 22 10 6 8 16 17 19 252 Wind Speed STABILITY CLASS: G Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 10 10 8 1 1 1 3 1 2 0 3 0 0 2 1 3 46 2.2 4.5 14 13 10 2 0 0 3 12 3 4 3 0 0 4 8 12 88 4.5 6.7 4 0 7 0 0 0 0 16 5 4 1 0 0 0 1 7 45 6.7 8.9 0 0 0 0 0 0 0 3 3 0 1 0 0 1 4 1 13 8.9 11.2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11.2 13.4 0 0 0 0 0 , 0 0 0 0 0 0 0 0 0 0 .0 0 13.4 17.9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 17.9 22.4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29.1 40.3 0 0 0 0 0. 0 0 0. 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 28 23 25 3 1 1 6 32 13 8 8 0 0 7 14 23 192 Wind Speed STABILITY CLASS: ALL Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 23 21 20 9 9 13 16 18 13 12 9 9 4 16 6 13 211 2.2 4.5 42 36 33 25 17 26 33 68 50 30 22 18 14 31 26 34 505 4.5 6.7 43 29 29 9 12 11 32 78 59 43 16 13 21 19 24 45 483 6.7 8.9 22 23 11 14 1 3 18 38 54 25 5 16 14 20 34 24 322 8.9 11.2 7 15 9 7 2 0 10 12 26 28 6 6 7 33 29 12 209 11.2 13.4 6 5 6 0 0 1 8 8 17 8 13 5 8 10 18 8 121 13.4 17.9 6 19 5 2 0 0 2 4 6 15 10 21 13 17 41 5 166 17.9 22.4 0 2 1 2 0 0 0 0 0 2 3 7 6 1 6 3 33 22.4 29.1 0 0 0 0 0 0 0 0 0. 0 2 4 0 0 4 1 11 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 149 150 114 68 41 54 119 226 225 163 86 99 87 147 188 145 2061 A B C D E F G TOTALS CALM 0 1 4 21 13 25 38 102 Occurrence of stability class on a percentage basis A 6.2%

B 9.29/6 C 12.5%

o 27.3%

E 21.3%

F 12.8%

G 10.6%

Columbia Generating Station 25 2009 Radioactive Effluent Report

Table 5-4 2nd Quarter Average, 245 Ft AGL Joint Frequency Distribution (version 4.0)

Sensor Criteria Time Frame Data Recovery Rate Wind Speed: 245 Foot Sensors Starting Date: 4/1/2009 Maximum Hours In Period: 2184 Wind Direction: 245 Foot Sensors Ending Date: 6/30/2009 Hours Missing: 12 Delta T: 245 Foot - 33 Foot Sensors Hours Used: 2172 Signal Path: MET B Recovery Rate: 99.5%

Processing: Instantaneous Wind Speed STABILITY CLASS: A Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 1 0 1 2 0 0 0 0 0 0 0 0 0 0 0.0 4 2.2 4.5 1 1 2 2 3 0 0 0 0 0 0 0 0 0 0 0 9 4.5. 6.7 3 8 1 3 0 2 1 0 0 0 .0 0 0 0 0 0 18 6.7 8.9 5 11 1 0 1 0 1 1 0 0 0 0 0 0 0 1 21 8.9 11.2 4 8 1 0 0 1 2 1 2 0 0 0 0 0 0 1 20 11.2 13.4 3 5 0 0 0 0 0 0 2 2 0 1 1 0 0 0 14 13.4 17.9 3 6 0 0 0 0 1 0 2 4 0 1 0 3 0 0 20 17.9 22.4 2 3 0 0 0 0 0 0 0 2 0 5 5 1 2 0 20 22.4 29.1 0 1 0 0 0 0 0 0 0 0 0 5 0 0 1 0 7 29.1 40.3 0 0 0 0 0 0 0 .0 0 0 0 2 0 0 0 0 2 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 22 .43 6 7 4 3 5 2 6 8 0 14 6 4 3 2 135 Wind Speed STABILITY CLASS: B Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 3 1 0 0 1 1 0 0 0 0 0 0 0 1 1 2 .10 2.2 4.5 7 1 5 3 4 4 2 0 1 1 0 2 2 1 0 2 35 4.5 6.7 10 3 1 6 1 6 2 2 0 0 1 0 0 .1 0 , 2 35 6.7 8.9 4 2 2 1 3 0 2 1 5 4 0 0 0 1 2 2 29 8.9 11.2 4 4 1 3 0 1 1 2 4 8 2 1 0 1 0 1 33 11.2 13.4 0 0 1 2 1 1 1 0 1 2 0 2 2 1 0 0 14 13.4 17.9 2 0 1 1 0 0 5 2 0 2 4 3 7 1 3 4 35 17.9 22.4 0 1 0 0 0 0 0 0 0 1 1 0 1 0 2 0 6 22.4 29.1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 0 3 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 30 12 11 16 10 13 13 7 11 18 9 9 12 7 10 13 201 Wind Speed STABILITY CLASS: C Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 4 0 0 1 1 2 0 0 1 0 0 1 0 1 0 4 15 2.2 4.5 2 0 0 2 4 7 5 2 3 1 0 1 4 7 3 1 42 4.5 6.7 5 4 6 2 2 1 10 10 5 4 1 4 2 3 5. 8 72 6.7 8.9 5 3 1 1 1 0 5 3 8 6 1 2 5 0 3 8 52 8.9 11.2 4 1 0 4 1 0 3 2 6 3 1 3 2 0 4 1 35 11.2 13.4 0 0 0 0 0 0 2 1 4 3 0 1 .3 3 1 3 21 13.4 17.9 2 2 1 1 0 0 1 0 3 2 0 1 4 1 0 0 18 17.9 22.4 0 1 0 0 0 0 0 0 0 1 0 3 1 3 3 0 12 22.4 29.1 0 0 0 0 0 0 0 0 0 0 2 0 1. 0 0 0 3 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 .0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 22 11 8 11 9 10 26 18 30 20 5 16 22 18 19 25 270 Wind Speed STABILITY CLASS: D Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 0 2 4 1 1 4 6 3 6 3 1 1 4 0 1 0 37 2.2 4.5 1 2 0 6 6 2 9 20 14 5 5 4 7 7 4 1 93 4.5 6.7 3 5 5 2 1 8 19 17 12 15 5 5 2 5 3 4 111 6.7 8.9 2 3 2 7 2 2 6 11 13 9 5 1 6 4 4 6 83 8.9 11.2 5 3 3 1 1 4 8 9 13 5 2 3 3 2 3 5 70 S1.2 163.4 1 1 1. 1 2. 0 1.....

. . 4 0 .- 3. 4 1 2 30 13.4. 17.9 2 4 4 0 1 0 1 4 7 10 4 3 1 10 13 5 69 17.9 22.4 4 3 3 1 1 0 0 0 0 1 4 7 1 12 15 2 54 22.4 29.1 0 2 2 0 0 0 0 0 0 0 1 1 2 4 12 0 24 29.1 40.3 0 0 2 0 0 0 0 0 0 0 1 0 1 0 4 0 8 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 18 25 26 19 15 20 50 65 72 52 28 26 30 48 60 25 579 Columbia Generating Station 26 -2009 Radioactive Effluent Report

Table 5-4 2nd Quarter Average, 245 Ft AGL (Continued)

Wind Speed STABILITY CLASS: E Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 0 1 0 0 1 1 1 3 3 1 1 1 0 1 1 1 16 2.2 4.5 1 0 2 1 1 3 4 1 3 2 2 4 6 0 6 3 39 4.5 6.7 2 1 0 0 2 3 3 6 4 2 1 9 4 7 8 4 56 6.7 8.9 5 4 1 1 0 3 3 2 6 5 2 2 6 10 13 4 67 8.9 11.2 4 3 2 0 1 0 2 8 6 3 2 3 8 10 4 8 64 11.2 13.4 1 1 0 0 0 2 0 3 4 3 1 2 5 10 6 6 44 13.4 17.9 1 2 2 0 0 1 1 5 9 8 9 4 8 19 24 4 97 17.9 22.4 0 0 3 1 0 0 1 1 0 1 4 4 3 21 16 0 55 22.4 29.1 0 0 3 1 0 0 0 0 0 1 3 4 1 2 3 0 18 29.1 40.3 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 2 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 14 12 14 4 5 13 15 29 35 27 25 33 41 80 81 30 458 Wind Speed STABILITY CLASS: F Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 2 0 0 0 1 1 1 2 5 2 1 3 0 0 2 1 21 2.2 4.5 2 2 4 3 1 1 2 3 4 3 5 1 3 6 4 5 49 4.5 6.7 4 3 2 2 0 1 2 1 7 2 3 3 0 1 2 2 35 6.7 8.9 2 2 1 0 0 1 1 4 8 6 3 1 0 6 5 2 42 8.9 11.2 2 2 1 1 0 0 4 7 9 6 0 0 3 6 5 3 49 11.2 13.4 1 1 2 1 0 0 2 3 3 2 2 0 1 1 8 0 27 13.4 17.9 1 1 1 0 0 0 0 1 7 3 4 1 1 8 9 1 38 17.9 22.4 0 0 0 0 0 0 0 1 0 0 1 0 1 8 0 0 11 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90, 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 14 11 11 . 7 2 4 12 22 43 24 19 9 9 36 36 14 273 Wind Speed STABILITY CLASS: G Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 1 1 0 2 1 1 1 3 2 3 2 2 0 2 1 1 23 2.2 4.5 10 3 5 2 3 3 2 5 8 1 2 6 1 0 4 2 57 4.5 6.7 10 2 3 3 1 1 5 5 8 1 2 3 0 0 2 10 56 6.7 8.9 6 2 0 1 0 0 1 6 5 2 0 1 0 1 2 2 29 8.9 11.2 1 1 2 2 0 0 1 1 1 1 0 0 0 1 6 6 23 11.2 13.4 0 0 1 1 0 0 0 6 2 0 0 0 0 0 6 2 18 13.4 17.9 0 0 0 0 0 0 2 0 1 0 1 0 0 1 3 1 9 17.9 22.4 0 0 0 0 0 0 0 0 0 0 0 0 0 6 1 0 7 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS *28 9 11 11 5 5 12 26 27 6 7 12 1 11 25 24 222 Wind Speed STABILITY CLASS: ALL Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 11 5 5 6 6 10 9 11 17 9 5 8 4 5 6 9 126 2.2 4.5 24 9 18 19 22 20 24 31 33 13 14 18 23 21 21 14 324 4.5 6.7 37 26 18 18 7 22 42 41 36 24 13 24 8 17 20 30 383 6.7 8.9 29 27 8 11 7 6 19 28 45 32 11 7 17 22 29 25 323 8.9 11.2 24 22 10 11 3 6 21 30 41 26 7 10 16 20 22 25 294

,11.2 13.4 6 8 5 5 3 3 6 14 23 16 3 7 15 19 22 13 168 13.4 17.9 11 15 9 2 1 1 11 12 29 29 22 13 21 43 52 15 286 17.9 22.4 6 8 6 2 1 0 1 2 0 6 10 19 12 51 39 2 165 22.4 29.1 0 3 5 1 0 0 0 0 0 1 7 11 4 6 18 0 56 29.1 40.3 0 0 3 0 0 0. 0 0 0 1 1 2 1 0 5 0 13 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 148 123 87 75 50 68 133 169 224 157 93 119 121 204 234 133 2138 A B C D E F G TOTALS CALM 0 0 4 13 4 5 8 34 Occurrence of stability class on a percentage basis A 6.2%

B 9.3%

C 12.6%

D 27.3%

E 21.3%

F 12.8%

G 10.6%

Columbia Generating Station 27 2009 Radioactive Effluent Report

Table 5-5 3rd Quarter Average, 33 Ft AGL Joint Frequency Distribution (version 4.0)

Sensor Criteria Time Frame Data Recovery Rate Wind Speed: 33 Foot Sensors Starting Date: 7/1/2009 Maximum Hours In Period: 2208 Wind Direction: 33 Foot Sensors Ending Date: 9/30/2009 Hours Missing: 7 Delta T: 245 Foot - 33 Foot Sensors Hours Used: 2201 Signal Path: MET B Recovery Rate: 99.7%

Processing: Instantaneous Wind Speed STABILITY CLASS: A Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2.2 4.5 2 5 8 12 3 1 2 0 0 0 0. 0 0 0 0 0 33 4.5 6.7 4 11 13 8 2 1 0 0 0 0 0 0 0 0 0 1 40 6.7 8.9 1 6 6 5 1 2 1 0 0 2 0 1' 0 0 0. 0 25 8.9 11.2 4 6 2 1 0 . 0 1 0 1 5 1 0 0 0 0 0 21 11.2 13.4 1 3 0 0 0 0 1 0 2 6 4 0 0 0 1 0 18 13.4 17.9 0 1 0 0 0 0 0 0 1 8 2 0 3 0 1 0 16 17.9 22.4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 2 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 12 32 29 26 6 4 5 0 4 21 7 1 3 0 5 1 156 Wind Speed STABILITY CLASS: B Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 1 2 0 4 3 2 0 1 0 0 0 0 0 0 0 0 13 2.2 4.5 2 5 7 14 15 19 10 2 2 0 0 0 0 0 0 0 76 4.5 6.7 4 8 2 17 3 6 8. 3 3 2 1 0 0 1 0 0 58 6.7 8.9 1 5 4 5 5 0 2 3 6 7 0 0 0 1 1 0 .40 8.9 11.2 3 0 0 1 1 0 3 0 6 7 2 0 1 2 1 0 27 11.2 13.4 0 0 0 0 0 0 0 3 3 2 2 0 1 1 3 0 15 13.4 17.9 0 0 0 0 0 0 0 1 1 2 1 0 0 1 1 1 8 17.9 22.4 0 0 0 0 0 0 0 0 0 1 0 2 0 0 0 1 4 22.4 29:1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 11 20 13 41 27 27 23 13 21 21 6 2 2 6 6 2 241 Wind Speed STABILITY CLASS: C Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 2 1 3 2 2 8 2 1 1 0 0 1 1 0 0 2 26 2.2 4.5 4 2 1 6 5 14 15 8 5 0 6 0 1 2 0 1 70 4.5 6.7 0 2 4 4 4 6 10 6 8 7 1 0 3 3 0 0 58 6.7 8.9 1 2 3 1 2 0 2 3 7 7 2 0 1 2 0 0 33 8.9 11.2 1 0 0 2 0 0 1 1 4 5 4 2 3 1 3 2 29 11.2 13.4 1 0 0 0 0 1 2 0 2 2 3 2 2 0 2 0 17 13.4 17.9 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 3 17.9 22.4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 2 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS .9 7 11 15 13 29 32 19 27 21 17 5 12 8 7 6 238 Wind Speed STABILITY CLASS: D Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 1 0 2 1 1 2 7 6 6 2 0 1 3 0 1 1 34 2.2 4.5 1 2 2 11 9 11 7 17 11 8 4 3 2 4 2 3 97 4.5 6.7 0 6 2 10 6 5 7 23 25 7 7 7 5 2 7 1 120 6.7 8.9 2 3 3 3 1 1 1 18 17 4 4 1 5 4 2 1 70

---8.9 11.2 - 4 1 1 0 0 .0 -2 5 7 6- 4. 1 5 --9 9 5 11.2 13.4 0 0 0 0 0 0 1 0 4 4 2 3 4 4 6 3 31 13.4 17.9 0 0 0 0 0 0 1 0 1 2 1 0 3 2 23 4 37 17.9 22.4 0 0 0 0 0 0 0 0 1 0 0 1 1 0 7 5 15 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 3 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 8 12 10 25 17 19 26 69 72 33 22 17 28 25 60 23 466 Columbia Generating Station 28 2009 Radioactive Effluent Report

Table 5-5 3rd Quarter Average, 33 Ft AGL (Continued)

Wind Speed STABILITY CLASS: E Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 1 1 0 6 2 2 4 1 6 2 1 1 4 1. 1 3 36 2.2 4.5 3 3 3 5 4 6 5 15 24 7 3 3 5 4 8 7 105 4.5 6.7 4 6 3 4 1 3 8 12 9 3 1 2 8 4 9 6 83 6.7 8.9 0 1 0 0 1 0 1 5 12 3 1 5 4 6 13 8 60 8.9 11.2 0 0 0 0 0 0 1 4 6 4 0 0 1 9 16 3 44 11.2 13.4 0 0 0 0 0 0 0 0 1 1 1 0 0 4 16 1 24 13.4 17.9 0 0 0 1 0 0 0 0 1 1 2 0 0 1 6 0 12 17.9 22.4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 2 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 8 11 6 16 8 11 19 37 59 21. 9 11 22 29 71 28 366 Wind Speed STABILITY CLASS: F Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 2 3 6 7 1 5 4 3 2 1 0 2 1 1 3 3 44 2.2 4.5 10 4 9 9 5 4 4 14 18 13 9 2 2 2 4 9 118 4.5 6.7 3 2 3 8 1 0 1 14 26 12 5 2 1 1 6 5 90 6.7 8.9 0 0 1 4 0 0 1 6 13 3 1 3 0 0 7 3 42 8.9 11.2 0 0 0 0 0 0 0 1 5 0 2 0 1 0 2 0 11 11.2 13.4 0 0 0 0 0 0 0 0 0 1 0 0 0 0 . 1 0 2 13.4 17.9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 17.9 22.4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 15 9 19 28 7 9 10 38 64 30 17 9 5 4 23 20 307 Wind Speed STABILITY CLASS: G Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 3 5 14 8 8 5 4 7 8 9 1 2 3- 0 0 1 78 2.2 4.5 5 18 49 15 4 8 11 24 19 11 6 5 4 0 0 3 182 4.5 6.7 1 5 13 8 1 1 2 9 15 3 1 .1 1 2 1 4. 68 6.7 8.9 0 0 1 2 0 0 0 3 6 1 1 0 0 0 3 2 19 8.9 11.2 0 0 0 0 0 0 0 0 0 0. 0 0 0 3 0 1 4 11.2 13.4 0 0 0 0 0 0 0 0 0. 0 0 0 0 0 0 0 0 13.4 17.9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 17.9 22.4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 9 28 77 33 13 14 17 43 48 24 9 8 8 5 4 11 351 Wind Speed STABILITY CLASS: ALL Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 10 12 25 28 17 24 21 19 23 14 2 7 12 2 5 10 231 2.2 4.5 27 39 79 72 45 63 54 80 79 39 28 13 14 12 14 23 681 4.5 6.7 16 40 40 59 18 22 36 67 86 34 16 , 12 18 13 23 17 517 6.7 8.9 5 17 18 20 10 3 8 38 61 27 9 10 10 13 26 14 289 8.9 11.2 12 7 3 4 1 0 8 11 29 27 13 3 11 24 31 11 195 11.2 13.4 2 3 0 0 0 1 4 3 12 16 12 5 7 9 29 4 107 13.4 17.9 0 1 0 1 0 0 1 1 4 13 7 0 7 4 32 5 76 17.9 22.4 0 0 0 0 0 0 0 0 1 1 0 3 1 0 12 7 25 22.4 29.1 0 0 0 0 0 0 0 0 0 0: 0 0 0 0 4 0 4 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 72 119 165 184 91 113 132 219 295 171 87 53 80 77 176 91 2125 A B C D E F G TOTALS CALM 0 2 3 14 11 18 28 76 Occurrence of stability class on a percentage basis A 7.1%

B 11.0%

C 10.9%

D 21.8%

E 17.1%

F 14.8%

G 17.2%

Columbia Generating Station 29 2009 Radioactive Effluent Report

Table 5-6 3rd Quarter Average, 245 Ft AGL Joint Frequency Distribution (version 4.0)

Sensor Criteria Time Frame Data Recovery Rate Wind Speed: 245 Foot Sensors Starting Date: 7/1/2009 Maximum Hours In Period: 2208 Wind Direction: 245 Foot Sensors Ending Date: 9/30/2009 Hours Missing: 7 Delta T: 245 Foot - 33 Foot Sensors Hours Used: 2201 Signal Path: MET B Recovery Rate: 99.7%

Processing: Instantaneous Wind Speed STABILITY CLASS: A Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2.2 4.5 3 2 3 6 0 1 0 0 0 0 0 0 0 0 0 0 15 4.5 6.7 6 11 11 6 6 1 0 0 0 0 0 0 0 0 0 1 42 6.7 . 8.9 6 15 7 2 0 0 0 0 0 0 0 0 0 0 0 0 30 8.9 11.2 6 10 0 0 0 0 1 0 1 3 0 1 0 0 0 0 22 11.2 13.4 3 3 0 0 0 0 1 0 1 5 2 0 0 0 0 0 15 13.4 17.9 0 3 0 0 0 0 1 0 1 10 3 0 1 0 1 0 20 17.9 22.4 0 0 0 0 0 0 0 0 1 5 0 1 1 0 2 0 10 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 2 29.1 .40.3 0 0 0 0 0 0 0 0 0 0 0 0' 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 24 44 21 14 6 2 3 0 4 23 5 2 2 0 5 1 156 Wind Speed STABILITY CLASS: B Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 1 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 4 2.2 4.5 4 13 7 10 10 12 1 0 0 0 0 0 0 0 0 4 61 4.5 6.7 7 9 7 16 2 8 4 3 1 2 0 0 1 0 0 0 60 6.7 8.9 7 6 2 8 1 3 5 1 4 4 0 0 0 0 1 1 43 8.9 11.2 4 4 0 2 0 0 1 1 7 6 0 0 1 1 0 2 29 11.2 13.4 1 0 0 0 0 0 2 2 4 4 2 1 0 2 0 0 18 13.4 17.9 0 0 0 0 0 0 0 2 3 3 2 0 2 2 2 0 16 17.9 22.4 0 0 0 0 0 0 0 0 0 2 1 0 0 0 2 0 5 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 2 0 0 1 0 3 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 24 33 16 37 14 23 13 9 19 21 5 3 4 5 6 7 239 Wind Speed STABILITY CLASS: C Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 4 3 1 1 1 6 4 1 0 1 0 0 1 0 2 2 27 2.2 4.5 5 3 5 2

8 8 3 3 0 3 1 1 1 2 3 51 4.5 6.7 3 4 2 6 3 6 6 5 7 5 2 0 2 0 0 0 51 6.7 8.9 0 2 6 3 4 4 3 3 8 3 2 1 5 0 0 1 45 8.9 11.2 0 1 0 1 1 1 1 1 5 8 2 2 1 2 2 1 29 11.2 13.4 1 0 0 1 0 0 0 0 2 2 3 1 2 1 1 2 16 13.4 17.9 1 0 0 0 0 1 1 0 1 2 1 3 1 1 1 0 13 17.9 22.4 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 3 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 14 13 14 14 12 26 23 13 26 21 13 8 14 6 10 9 236 Wind Speed STABILITY CLASS: D Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1..2-------- -1 2 5 7 1 2 -2 2 0 2 0 31 2.2 4.5 1 3 3 3 3 5 7 17 6 7 3 2 2 2 3 2 71 4.5 6.7 4 2 5 8 7 3 6 17 14 6 4 5 3 1 5 6 96 6.7 8.9 0 2 2 7 7 2 3 .13 13 5 4 3 5 0 3 1 70 8.9 11.2 5 3 2 1 1 2 1 6 12 6 2 1 1 1 1 2 47 11.2 13.4 2 1 2 0 0 0 3 4 4 6 3 2 5 3 0 3 38 13.4 17.9 0 0 0 0 0 1 2 0 3 4 3 4 5 11 14 3 50 17.9 22.4 0 0 0 0 0 0 0 0 1 0 1 0 4 4 17 0 27 22.4 29.1 0 0 0 0 0 0 0 0 2 0 0 1 1 3 21 0 28 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 3 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 12 13 15 20 20 16 27 64 58 35 22 20 28 25 69 17 461 Columbia Generating Station 30 2009 Radioactive Effluent Report

Table 5-6 3 rd Quarter Average, 245 Ft AGL (Continued)

Wind Speed STABILITY CLASS: E Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 0 0 1 3 0 1 1 0 1 0 1 2 2 1 0 0 13 2.2 4.5 3 2 1 2 3 2 6 3 3 1 7 3 2 2 3 9 52 4.5 6.7 4 1 2 3 4 1 1 6 6 5 1 2 1 8 6 3 54 6.7 8.9 1 1 1 7 1 4 4 8 5 1 .2 3 2 4 9 3 56 8:9 11.2 3 5 1 2 0 0 1 2 7 3 2 1 3 7 is 3 55 11.2 13.4 1 0 0 0 0 0 1 0 7 3 3 0 0 7 12 0 34 13.4. 17.9 0 0 0 0 0 0 1 0 5 7 2 0 7 18 14 5 59 17.9 22.4 0 0 0 0 0 0 0 0 1 2 2 0 1 19 15 0 40 22.4 29.1 0 0 0 1 0 0 0 0 0 0 1 0 0 2 5 0 9 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 2 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 12 9 6 18 8 8 15 19 35 22 21 .11 18 69 80 23 374 Wind Speed STABILITY CLASS: F Min Max N "NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 0 1 1 0 1 0 0 2 1 4 2 1 0 1 1 3 18 2.2 4.5 4 2 1 4 5 3 6 7 6 2 5 1 5 2 3 3 59 4.5 6.7 4 4 6 1 4 3 1 9 11 7 6 6 5 1 3 5 76 6.7 8.9 4 4 1 5 0 0 1 6 12 6 4 2 1 1 6 7 60 8.9 11.2 1 0 1 0 0 0 1 6 10 4 2 0 1 1 12 8 47 11.2 13.4 0 0 0 1 0 0 1 5 6 5 2 0 0 5 4 1 - 30 13.4 17.9 0 0 0 2 0 0 0 0 4 3 1 0 0 3 7 1 21 17.9 22.4 0 0 0 0 0 0 0 0 0 0 1 0 1 3 2 0 7 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 2 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 13 11 10 13 10 6 10 35 50 31 23 10 13 17 40 28 320 Wind Speed STABILITY CLASS: G Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 4 4 3 4 2 5 0 2 4 3 0 1 2 0 2 0 36 2.2 4.5 7 3 8 13 3 2 5 9 7 11" 6 2 1 2 4 3 86 4.5 6.7 13 10 6 7 1 1 3 6 13 7 6 1 3 0 . 4 6 87 6.7 8.9 9 4 9 6 1 0 1 8 9 5 2 2 1 0 1 12 70 8.9 11.2 4 4 1 2 0 0 0 5 5 1 0 1 0 0 1 15 39 11.2 13.4 0 0 0 0 0 0 0 4 5 2 0 0 0 2 10 ,2 25 13.4 17.9 2 0 0 2 0 0 0 4 0 1 0 0 0 1 8 2 20 17.9 22.4 0 0 0 1 0 0 0 0 0 0 0 0 0 0 3 0 4 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 39 25 27 35 7 8 9 38 43 30 14 7 7 5 33 40 367 Wind Speed STABILITY CLASS: ALL Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 9 11 7 10 7 15 10 12 7 9 5 6 7 2 7 5 129 2.2 4.5 27 28 28 40 27 33 33 39 27 21 24 9 11 9 15 24 395 4.5 6.7 41 41 39 47 27 23 21 46 52 32 19 14 15 10 18 21 466 6.7 8.9 27, 34, 28 38 14 13 17 39 51 24 14 11 14 5 20 25 374 8.9 11.2 23 27 5 8 2 3 6 21 47 31 8 6 7 12 31 31. 268 11.2 13.4 8 4 2 2 0 0 8 15 29 27 15 4 7 20 27 8 176 13.4 17.9 3 3 0 4 0 2 5 6 17 30 12 7 16 36 47 11 199 17.9 22.4 0 0 0 1 0 0 0 0 3 9 5 1 8 27 42 0 96 22.4 29.1. 0 0 0 1 0 0 0 0 2 0 1 3 1 5 32 0 45 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 1 4 0 5 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 138 148 109 151 77 89 100 178 235 183 103 61 86 127 243 125 2153 A B C D E F G TOTALS CALM 0 4 5 19 3 5 12 48 Occurrence of stability class on a percentage basis A 7.1%

B 11.0%

C 10.9%

D 21.8%

E 17.1%

F 14.8%

G 17.2%

Columbia Generating Station 31 2009 Radioactive Effluent Report

Table 5-7 4th Quarter Average, 33 Ft AGL Joint Frequency Distribution (version 4.0)

Sensor Criteria Time Frame Data Recovery Rate Wind Speed: 33 Foot Sensors Starting Date: 10/1/2009 Maximum Hours In Period: 2208 Wind Direction: 33 Foot Sensors Ending Date: 12/31/2009 Hours Missing: 197 Delta T: 245 Foot - 33 Foot Sensors Hours Used: 2011 Signal Path: MET B Recovery Rate: 91.1%

Processing: 15 Minute Averaged Wind Speed STABILITY CLASS: A Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 0. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2.2 4.5 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 2 4.5 6.7 , 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 6.7 8.9 1 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 3 8.9 11.2 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 11.2 13.4 0 0 0 "0 0 0 0 0 0 0 0 0 0 0 0 0 0 13.4 17.9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 17.9 22.4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 22.4 29.1 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 2 29.1 40.3 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 40.3 90 0 0 0 0 0 0 ,0 0 0 0 0 0 0 0 0 0 0 TOTALS 3 1 0 0 0 0 0 1 1 3 1 0 0 0 0 0 10 Wind Speed STABILITY CLASS: B Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2.2 4.5 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 7 4.5 6.7 4 1 1 0 0, 0 0 0 0 0 0 0 0 0 0 0 6 6.7 8.9 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 8.9 11.2 3 3 0 0 0 0 0 0 0 0 0 0 ,0 0 0 3 9 11.2 13.4 0 0 0 0 0 0 0 0 1 1 0 0 0 0 1 0 3 13.4 17.9 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 2 17.9 22.4 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 22.4 29.1 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 2 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0- 0 0 0 0 0 0 0 0 0 0 TOTALS 12 5 1 0 0 0 0 0 1 2 2 0 1 0 2 6 32 Wind Speed STABILITY CLASS: C Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 1 1 1 0 1 0 0 0 0 0 0 0 0 0 0 1 5 2.2 4.5 4 2 1 1 0 0 0 0 0 0 0 0 0 0 0 1 9 4.5 6.7 1 5 2 0 0 0 0 0 1 0 0 0 0 0 0 0 9 6.7 8.9 1 1 1 0 0 0 0 1 0 0 0 0 0 0 0 1 5 8.9 11.2 3 4 0 0 0 0 1 0 1 1 0 0 0 0 0 2 12 11.2 13.4 3 0 0 0 0 0 0 3 2 0 0 0 0 0 1 0 9 13.4 17.9 0 0 0 0 0 0 0 0 1 2 0 2 0 0 2 0 7 17.9 22.4 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 2 22.4 29.1 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 2 29.1 40.3 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 40.3 .90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 13 13 6 1 1 0 1 4 5 5 2 2 0 0 3 5 61 Wind Speed STABILITY CLASS: D Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 12 3 1 4 2 3 1 2 8 2 6 0 4 5 *5 8 66

.2.2 4.5.. 15 .. 7 6 .2 1 3 -17. .21 3 .. 2 .... 2 ..... .6 ....,7....

7 . .. 12... 26-...137 4.5 6.7 9 15 5 1 0. 0 3 17 13 8 1 1 1 1 15 20 110 6.7 8.9 7 6 0 0 0 0 1 17 25 3 2 1 1 1 10 8 82 8.9 11.2 5 1 0 0 0 0 4 14 10 4 4 0 0 2 6 2 52 11.2 13.4 1 2 1 0 0 0 2. 5 9 4 3 0 0 3 1 1 32 13.4 17.9 0 3 0 0 0 0 0 3 8 8 2 1 2 3 2 0 32 17.9 22.4 0 1 1 0 0 0 0 0 0 6 7 1 1 1 0 0 18 22.4 29.1 0 3 13 0 0 0 0 0 0 1 2 0 0 0 0 0 19 29.1 40.3 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 3 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 49 41 30 7 3 6 18 75 94 39 29 6 15 23 51 65 551 Columbia Generating Station 32 2009 Radioactive Effluent Report

Table 5-7 4 th Quarter Average, 33 Ft AGL (Continued)

Wind Speed STABILITY CLASS: E Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 5 1 3 2 2 0 1 3 9 6 5 5 4 2 9 11 68 2.2 4.5 16 5 2 3 0 2 7 2 19 12 6 5 2 14 15 29 139 4.5 6.7 8 4 4 2 0 2 9 15 20 3 6 9 3 3 16 19 123 6.7 8.9 2 3 1 1 0 2 6 28 11 7 2 3 3 5 5 10 89 8.9 11.2 2 1 0 0 0 1 8 14 10 5 3 2 1 3 1 3 54 11.2 13.4 1 0 0 0 0 0 3 7 8 10 4 1 1 7 2 2 46 13.4 17.9 0 0 0 0 0 1 2 9 7 6 8 1 3 0 0 0 37 17.9 22.4 0 0 1 0 0 0 0 0 1 8 1 0 0 0 0 0 11 22.4 29.1 0 0 0 0 0 0 0 0 0 0. 0 0 0 0 0 0 0 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0. 0 0 0 0 0 0 0 0 0 0 0 TOTALS 34 14 11 8 2 8 36 78 85 57 35 26 17 34

48 74 567 Wind Speed STABILITY CLASS: F Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 9 9 8 1 1 2 2 4 4 8 8 3 5 8 9 14 95 2.2 4.5 19 9 4 1 0 3 3 4 16 14 11 5 3 5 26 26 149 4.5 6.7 0 2 2 1 0 2 3 13 16 6 4 2 3 4 14 8 80.

6.7 8.9 0 0 1 0 0 0 0 14 10 4 1 1 1 2 4 5 43 8.9 11.2 0 0 0 0 0 0 1 17 13 I 1 1 0 3 3 1 41 11.2 13.4 0 0 0 0 0 0 4 7 3 0 1 0 0 0 0 0 15 13.4 17.9 0 0 0 0 0 0 0 2 1 0 0 0 1 0 0 0 4 17.9 22.4 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 28 20 15 3 1 7 13 61 64 33 26 12 13 22 56 54 428 Wind Speed STABILITY CLASS: G Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 . 2.2 4 3 8 1 0 0 1 2 5 2 3 3 9 6 16 15 78 2.2 4.5 9 5 5 0 0 0 0 2 9 4 3 1 6 8 20 33 105 4.5 6.7 4 0 1 0 0 0 0 4 5 4 0 0 0 4 7 5 34 6.7 8.9 0 0 0 0 0 0 1 5 4 0 0 1 0 0 4 1 16 8.9 11.2 0 0 0 0 0 0 0 0 1 0 0 0 .0 0 0 0 1 11.2 13.4 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 13.4 17.9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 17.9 22.4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 17 8 14 1 0 0 2 14 24 10 6 5 15 18 47 54 235 Wind Speed STABILITY CLASS: ALL Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 31 18 21 8 6 5 5 11 26 18 22 11 22 21 39 49 313 2.2 4.5 68 28 18 7 1 8 17 25 65 33 23 13 17 34 73 118 548 4.5 6.7 27 27 15 4 0 4 15 49 55 21 11 12 7 12 52 52 363 6.7 8.9 12 11 3 1 0 2 8 65 51 14 5 6 5 8 23 25 239 8.9 11.2 13 9 0 0 0 1 14 46 35 11 8 3 1 8 10 11 170 11.2 13.4 5 2. 1 0 0 0 9 23 23 15 8 1 1 10 5 3 106 13.4 17.9 0 3 0 0 0 1 2 14 17 16 10 4 7 3 5 0 82 17.9 22.4 0 1 2 0 0 0 0 0 2 17 8 1 1 1 0 0 33

.22.4 29.1 . 0 3 13 0 0 0 0 0 0 3 6 0 0 0 0 0 25 29.1 40.3 0 0 4 0 0 0 0 0 0 1 0 10 0 0 0 0 5 40.3 90 0 0 0 0 0 0 0 .0 0 0 0 0 0 0 0 0 0 TOTALS 156 102 77 20 7 21 70 233 274 149 101 51 61 97 207 258 1884 A B C 0 E F G TOTALS CALM 0 1 1 24 33 43 25 127 Occurrence of stability class on a percentage basis A 0.5%

B 1.6%

C 3.1%

D 28.6%

E 29.8%

F 23.4%

G 12.9%

Columbia Generating Station 33 2009 Radioactive Effluent Report

Table 5-8 4th Quarter Average, 245 Ft AGL Joint Frequency Distribution (version 4.0)

Sensor Criteria Time Frame Data Recovery Rate Wind Speed: 245 Foot Sensors Starting Date: 10/1/2009 Maximum Hours In Period: 2208 Wind Direction: 245 Foot Sensors Ending Date: 12/31/2009 Hours Missing: 197 Delta T: 245 Foot - 33 Foot Sensors Hours Used: 2011 Signal Path: MET 8 Recovery Rate: 91.1%

Processing: Instantaneous Wind Speed STABILITY CLASS: A Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2.2 4.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4.5 6.7 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 6.7 8.9 1 1 0 0 .0 0 0 0 0 0 0 0 0 0 0 0 2 8.9 11.2 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 11.2 13.4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 13.4 17.9 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 17.9 22.4 0 0 0 0 0 0 0 0 0. 0 0 0 0 0 0 0 0 22.4 29.1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 29.1 40.3 0 0 0 0 0 0 0 0 0 1 0 0 0 .0 0 0 1 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 2 1 0 0 0 0 0 1 1 2 0 0 0 0 0 0 7 Wind Speed STABILITY CLASS: S Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2.2 4.5 2 0 0 0 0 0 0 0 0 0 0 0 .0 0 0 2 4 4.5 6.7 5 0 1 0 0 0 0 0 0 0 0 0 0 0 0 2 8 6.7 8.9 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 8.9 11.2 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 2 5 11.2 13.4 2 1 0 0 0 0 0 0 2 0 0 0 0 0 1 2 8 13.4 17.9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 2 17.9 22.4 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 22.4 29.1 0 0 0 0 0 0 0 0 0 3 2 0 0 0 0 0 5 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 12 4 1 0 0 0 0 0 2 3 2 1 0 0 3 8 36 Wind Speed STABILITY CLASS: C Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 2 0 1 1 0 0 0 0 0 0 0 0 0 0 0 2 6 2.2 4.5 2 1 2 1 0 0 0 0 0 0 0 0 0 0 0 4 10 4.5 6.7 1 3 1 0 0 0 0 1 1 0 0 1 0 0 0 1 9 6.7 8.9 1 1 2 0 0 0 0 0 0 0 0 *0 0 0 0 1 5 8.9 11.2 2 1 0 0 0 0 0 0 1 0 0 0 0 0 1 2 7 11.2 13.4. 3 1 0 0 0 0 1 0 0 1 0 0 0 0 0 2 8 13.4 17.9 1 1 0 0 0 0 0 2 3 2 0 0 0 0 1 1 11 17.9 22.4 0 0 0 0 0 0 0 0 0 0 0 2 0 0 1 0 3

.22.4 29.1 0 0 0 0 0 0 0 0 0 1 2 0 0 0 0 0 3 29.1 40.3 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 .0 0 0 0 0 TOTALS 12 8 7 2 0 0 1 3 5 4 2 3 0 0 3 13 63 Wind Speed STABILITY CLASS: D Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 4 0 1 6 5 2 2 5 4 6 1 4 3 1 3 3 50 2.2 4.5 8 5 4 3 4 5 5 9 19 3 5 1 4 6 18 16 115 4.5 6.7 8 7 2 2 0 1 3 17 12 5 2 2 0 2 18 10 91 6.7 8.9 5 7 5 0 0 0 2 12 14 3 1 0 0 2 13 11 75 8.9 11.2 5 4 0 0 0 0 4 7 19 5 0 0 1 1 6 8 60

.11.2 13.4 2 2 0 0 0 0 5 9 11 5 8 1 2 0 9 5 59 13.4 17.9 3 1 0 0 0 0 0 9 8 9 2 2 1 7 4 1 47 17.9 22.4 0 3 0 0 0 0 0 0 6 3 5 2 0 2 1 0 22 22.4 29.1 0 1 1 0 0 0 0 0 2 6 6 0 2 2 0 0 20 29.1 40.3 0 5 16 0 0 0 0 0 0 1 2 0 0 0 0 0 24 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 35 35 29 11 9 8 21 68 95 46 32 12 13 23 72 54 563 Columbia Generating Station 34 2009 Radioactive Effluent Report

Table 5-8 4 th Quarter Average, 245 Ft AGL (Continued)

Wind Speed STABILITY CLASS: E Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 2 0 1 1 2 3 1 3 3 2 1 1 4 4 2 1 31 2.2 4.5 2 5 2 5 3 4 6 6 9 7 5 10 6 11 10 13 104 4.5 6.7 5 8 2 2 2 1 3 5 8 4 0 1 1 1 12 15 70 6.7 8.9 5 0 2 3 0 0 6 20 9 2 3 0 3 1 8 15 77 8.9 11.2 4 3 0 0 0 0 6 11 6 5 4 1 2 2 10 8 62 11.2 13.4 0 1 2 1 0 1 5 11 10 11 4 1 3 7 5 1 63 13.4 17.9 6 0 0 1 0 0 3 15 15 14 8 4 2 6 8 5 87 17.9 22.4 0 1 1 0 .0 1 5 4 5 9 8 1 3 11 1 0 50 22.4 29.1 0 0 0 0 0 0 1 3 2 8 5 2" 2 0 0 0 23 29.1 40.3 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 24 18 10 13 7 10 36 78 67 63 38 21 26 43 56 58 568 Wind Speed STABILITY CLASS: F Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 2 1 4 5 4 2 2 6 2 1 1 1 3 3 1 2 40 2.2 4.5 11 11 11 6 3 4 2 3 1 6 6 4 5 6 9 7 95 4.5 6.7 3 9 8 4 0 1 2 9 5 5 1 4 2 1 12 13 79 6.7 8.9 3 4 3 1 0 1 8 8 6 4 2 1 0 1 9 15 66 8.9 11.2 3 2 2 0 0 0 7 14 8 4 2 2 1 2 8 3 58 11.2 13.4 2 0 1 0 0 0 6 6 5 3 2 0 1 3 2 7 38 13.4 17.9 0 0 0 0 0 0 3 13 16 9 2 0 4 8 9 1 65 17.9 22.4 0 0 0 0 0 1 3 3 3 1 0 0 1 2 3 0 17 22.4 29.1 0 0 0 0 0 0 0 0 2 1 0 0 1 0 0 0 4 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 24 27 29 16 7 9 33 62 48 34 16 12 18 26 53 48 462 Wind Speed STABILITY CLASS: G Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 3 4 0 0 2 5 1 2 9 1 1 1 2 5 1 2 39 2.2 4.5 6 8 8 7 2 5 5 2 6 5 2 3 2 1 2 3 67 4.5 6.7 10 7 7 1 0 0 2 6 4 4 2 3 1 3 5 7 62 6.7 8.9 0 1 2 0 0 0 1 4 5 2 2 2 0 0 3 11 33 8.9 11.2 4 1 1 0 0 1 2 3 3 1 0 0 0 3 4 6 29 11.2 13.4 1 0 0 0 0 0 0 2 3 0 1 0 0 0 2 2 11 13.4 17.9 0 0 0 0 0 0 0 1 6 0 0 0 0 2 4 0 13 17.9 22.4 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 -0 0 0 0 0 0 TOTALS 24 21 18 a 4 11 11 20 37 13 a 9 5 14 21 31 255 Wind Speed STABILITY CLASS: ALL Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 13 6 7 13 13 12 6 16 18 10 4 7 12 13 7 10 167 2.2 4.5 31 30 27 22 12 18 18 20 35 21 18 18 17 24 39 45 395 4.5 6.7 33 34 21 9 2 3 10 38 30 18 5 11 4 7 47 48 320 6.7 8.9 16 15 14 4 0 1 17 44 34 11 8< 3 3 4 33 53 260 8.9 11.2 20 12 3 0 0 1 19 35 38 15 6 3 4 8 29 29 222 11.2 13.4 10 5 3 1 0 1 17 28 31 20 15 2 6 10 19 19 187 13.4 17.9 10 2 0 1 0 0 6 41 48 34 12 6 7 23 28 8 226 17.9 22.4 0 4 1 0 0 2 8 7 15 13 13 6 4 15 6 0 94 22.4 29.1 0 1 1 0 0 0 1 3 6 20 15 2 5 2 0 0 56 29.1 40.3 0 5 17 0 0 0 0 0 0 3 2 0 0 0 0 0 27 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 133 114 94 50 27 38 102 232 255 165 98 58 62 106 208 212 1954 A B C D E F G TOTALS CALM 0 0 1 19 13 13 11 57 Occurrence By Stability Class on'a percentage basis A 0.3%

B 1.8%

C 3.2%

D 28.9%

E 28.9%

F 23.6%

G 13.2%

Columbia Generating Station 35 2009 Radioactive Effluent Report

Table 5-9 Year 2009, 33 Ft AGL Joint Frequency Distribution (version 4.0)

Sensor Criteda Time Frame Data Recovery Rate Wind Speed: 33 Foot Sensors Starting Date: 111/2009 Maximum Hours In Period: 8760 Wind Direction: 33 Foot Sensors Ending Date: 12131/2009 Hours Missing: 256 Delta T: 245 Foot - 33 Foot Sensors Hours Used: 8504 Signal Path: MET B Recovery Rate: 97.1%

Processing: Instantaneous Wind Speed STABILITY CLASS: A Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 0 3 1 2 0 0 0 0 0 0 0 0 0 0 0 0 6 2.2 4.5 2 7 11 14 7 3 2 0 0 0 0 0 0 0 0 0 46 4.5 6.7 8 20 20 8 3 2 2 0 0 0 0 0 0 0 0 1 64 6.7 8.9 8 17 8 5 1 2 2 1 4 2 0 1 0 1 0 0 52 8.9 11.2 5 16 2 1 0 0 3 1 1 8 1 1 0 1 0 0 .40 11:2 13.4 2 8 0 0 0 0 2 0 5 7 4 1 0 1 1 0 31

.13.4 17.9 1 10 0 0 0 0 0 0 3 11 2 5 7 2 4 0 45 17.9 22.4 0 1 0 0 0 0 0 0 0 0 0 4 1 0 2 0 8 22.4 29.1 0 0 0 0 0 0 0 0 0 2 0 3 0 1 1 1 8 29.1 40.3 0 . 0 0 0 0 0 0 0 0 1 1 0 1 1 1 0 5 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 26 82 42 30 11 7 11 2 13 31 .8 15 9 7 9 2 305 Wind Speed STABILITY CLASS: B Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 5 6 0 4 3 4 2 1 0 0 0 1 0 1 0 0 27 2.2 4.5 17 14 13 23 18 24 15 2 2 2 1 1 2 1 0 2 137 4.5 6.7 17 16 7 19 8 7 10 5 4 5 2 0 1 2 0 3 106 6.7 8.9 9 12 7 8 5 0 4 5 15 10 0 1 0 1 4 0 81 8.9 11.2 6 2 1 4 2 0 6 1 12 11 3 1 1 3 3 3 59 11.2 13.4 2 1 1 0 0 0 2 4 5 3 5 1 4 3 4 3 38 13.4 17.9 0 2 0 0 0 0 2 2 1 4 5 1 4 2 5 2 30 17.9 22.4 0 1 0 0 0 0 0 0 0 6 3 3 1 0 1 1 16 22.4 29.1 0 0 0 0 0 0 0 0 0 2 1 2 1 1 1 0 8 29.1 40.3 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 56 54 29 58 36 35 41 20 39 43 21 11 14 14 18 14 503 Wind Speed STABILITY CLASS: C Min Max N NNE NE ENE E ESE SE SSE' S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 9 3 6 4 4 11 2 1 2 0 0 2 2 3 2 6 57 2.2 4.5 13 9 5 10 8 24 23 13 6 4 6 3 3 6 5 8 146 4.5 6.7 9 14" 15 7 5 6 17 18 15 16 4 *2 7 5 2 9 151 6.7 *8.9 12 6 7 6 2 0 4 6 14 14 3 6 2 4 4 7 97 8.9 11.2 7 3 1 2 1 0 4 5 6 9 6 3 4 6 6 5 68 11.2 13.4 3 2 2 0 0 1 3 4 9 8 3 2 4 2 3 0 46 13.4 17.9 3 3 0 0 0 0 0 1 1 4 4 4 4 2 8 3 37 17.9 22.4 0 0 0 0 0 0 0 0 0 3 4 1 2 0 3 1 14 22.4 29.1 0 0 0 . 0 0 0 0 0 0 0 1 1 0 0 0 0 2 29.1 40.3 0 0 1 0 0 0 0 0 0 0 1 0 0 0 1 0 3 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 56 40 37 29 20 42 53 48 53 58 32 24 28 28 34 39 621 Wind Speed STABILITY CLASS: 0 Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 15 12 16 15 8 15 17 24 23 11 5 7 11 9 8 33 229 2.2 4.5 41 24 23 19 19 18 34 60 62 29 17 18 19 29 47 84 541 4.5 6.7 49 33 21 16 11 12 19 74 71 45 17 15 17 11 56 71 538 6.7 8.9 25 15 6 7 2 4 13 59 72 23 8 4 13 14 27 48 340 8.9 11.2 18 7 6 2. 0 0 9 29 34 30 11 4 10 18 31 26 235 11.2 13.4 4 1 3 0 0 1 4 8 25 23 12 5 7 8 22 10 133 13.4 17.9 5 9 3 2 0 0 1 9 12 26 16 12 9 14 51 .16 185 17.9 22.4 0 1 2 2 0 0 0 0 3 12 13 6 5 3 13 8 68 22.4 29.1 0 4 14 0 0 0 0 0 0 5 4 1 2 2 9 0 41 29.1 40.3 0 0 1 0 .0 0 0 0 0 1 1 0 0 "0 1 0 4 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ,0 TOTALS 157 106 95 63 40 50 97 263 302 205 104 70 93 108 265 296 2314 Columbia Generating Station 36 2009 Radioactive Effluent Report

Table 5-9 Year 2009, 33 Ft AGL (Continued)

Wind Speed STABILITY CLASS: E Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 14 9 10 14 6 6 12 12 18 17 11 11 15 17 19 22 213 2.2 4.5 55 18 14 12 6 10 19 34 63 42 23 25 17 40 , 46 80 504 4.5 6.7 22 19 14 8 3 7 26 48. 52 17 12 20 23 24 '62 59 416 6.7 8.9 9 7 4 6 1 1 14 52 43 21 8 20 17 24 52 32 311 8.9 11.2 2 1 5 2 0 2 9 28 36 24 11 9 7 39 51 17 243 11.2 13.4 2 0 1 0 0 0 7 19 11 28 16 2 6 16 28 8 144 13.4 17.9 0 0 2 1 0 1 2 12 8 26 25 9 6 10 19 3 124 17.9 22.4 0 0 1 0 0 0 0 0 3 21 8 1 0 5 6 0 45 22.4 29.1 0 0 0 0 0 0 0 0 0 6 7 3 0 0 0 0 16 29.1 40.3 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 2 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 104 54 51 43 16 27 89 205 234 202 123 100 91 175 283 221 2018 Wind Speed STABILITY CLASS: F MIn Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 17 16 21 14 5 5 6 15 17 16 12 13 12 12 27 33 241 2.2 4.5 52 24 25 13 5 7 12 40 59 39 26 11 13 17 51 62 456 4.5 6.7 14 14 12 11 1 2 11 45 69 34 12 12 9 9 36 31 322 6.7 8.9 2 2 5 5 0 0 3 26 47 15 5 6 5 15 20 12 168 8.9 11.2 2 0 1 0 0 0 4 25 33 7 7 2 2 10 14 4 111 11.2 13.4 0 0 0 0 0 0 2 13 11 2 2 0 1 0 1 0 32 13.4 17.9 0 0 0 0 0 0 0 1 1 5 1 0 0 0 0 0 8 17.9 22.4 0 0 0 0 0 0 0 0 2 1 0 0 0 0 0 0 3 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 87 56 64 43 11 14 38 165 239 119 65 44 42 63 149 142 1341 Wind Speed STABILITY CLASS: G Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 27 23 30 9 9 6 10 10 18 14 10 . 7 9 12 30 31 255 2.2 4.5 34 37 67 17 4 a 17 43 39 28 '14 8 10 13 32 62 433 4.5 6.7 9 5 20 8 1 1 2 31 35 10 5 1 1 7 16 21 173 6.7 8.9 0 1 6 2 0 0 0 16 19 5 3 1 0 2 12 5 72

8.9 11.2 0 0 0 0 0 0 0 7 8 0 0 0, 0 3 0 1 19 11.2 13.4 0 0 0 0 0 0 0 3 1 0 0 0 0 0 0 0 4 13.4 17.9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 17.9 22.4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 ,0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 70 66 123 36 14 15 29 110 120 57 32 17 20 37 90 120 956 Wind Speed STABILITY CLASS: ALL Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 87 72 84 62 35 47 49 63 78 58- 38 41 49 54 86. ' 125 1028 2.2 4.5 214 133 158 108 67 94 122 192 231 144 87 64 64 106 181 298 2263 4.5 6.7 128 121 109 77 32 37 87 221 246 127 52 50 58 58 172 195 1770 6.7 8.9 65 60 43 39 11 7 , 40 165 214 90 27 39 37 61 119 104 1121 8.9 11.2 40 29 16 11 3 2 35 96 130 89 39 20 24 80 105 56 775 11.2 13.4 13 12 7 0 0 2 20 51 67 71 42 11 22 30 59 21 428 13.4 17.9 9 24 5 3 0 1 5 25 26 76 53 31 30 30 87 24 429 17.9 22.4 0 3 3 2 0 0 0 0 8 43 28 15 9 8 25 10 154 22.4 29.1 0 4 14 0 0 0 0 0 0 15 13 10 3 4 11 1 75 29.1 40.3 0 0 2 0 0 0 0 0 0 2 6 0 1 1 3 0 15 40.3 90 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 TOTALS 556 458 441 302 148 190 358 813 1000 715 385 281 297 432 848 834 8058 A B C D E F G TOTALS CALM 0 4 9 106 89 125 113 446 Occurrence of stability class on a percentage basis A 3.6%

a 8.0%

C 7.4%

O 28.5%

E 24.8%

F 17.2%

G 12.6%

Columbia Generating Station 37 2009 Radioactive Effluent Report

Table 5-10 Year 2009, 245 Ft AGL Joint Frequency Distribution (version 4.0)

Sensor Criteria Time Frame Data Recovery Rate Wind Speed: 245 Foot Sensors Starting Date: 1/1/2009 Maximum Hours In Pedod: 8760 Wind Direction: 245 Foot Sensors Ending Date: 12/31/2009 Hours Missing: 228 Delta T: 245 Foot - 33 Foot Sensors Hours Used: 8532 Signal Path: MET B Recovery Rate: 97.4%

Processing: Instantaneous Wind Speed STABILITY CLASS: A Min - Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 1 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0 4 2.2 4.5 4 3 5 8 3 1 0 0 0 0 0 0 0 0 0 0 24 4.5 6.7 10 19 12 9 6 3 1 0 0 0 0 0 0 0 0 1 61 6.7 8:9 12 27 8 2 1 0 1 1 0 0 0 0 0 1 0 1 54 8.9 11.2 10 19 1 0 0 1 3 1 4 3 0 1 0 0 0 1 44

-11.2 13.4 6 8 0 0 0 0 1 0 3 7 2 1 1 0 0 0 29 13.4 17.9 3 9 0 0 0 0 2 1 3 14 3 1 1 3 1 0 41 17.9 22.4 2 3 0 0 0 0 0 0 1 7 0 6 6 1 4 0 30 22.4 29.1 0 1 0 0 0 0. 0 0 0 1 1 5 0 0 3 0 11 29.1 40.3 0 0 0 0 0 0 0 0 0 1 1 2 1 1 0 0 6 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 2 TOTALS 48 89 27 21 10 5 8 3 11 33 7 16 9 7 9 3 306 Wind Speed STABILITY CLASS: B Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 4 4 0 1 2 1 0 0 0 0 0 0 0 1 1 2 16 2.2 4.5 14 15 13 14 14 16 3 0 1 1 0 2 2 1 0 8 104 4.5 6.7 23 12 10 22 3 14 6 5 1 2 1 1 2 1 0 4 107 6.7 8.9 14 11 5 9 4 3 7 2 9 a 0 0 0 1 3 3 79 8.9 11.2 10 10 3 5 0 1 2 3 11 14 2 1 1 2 0 5 70 11.2 13.4 3 2 1 2 1 1 3 *2 7 6 2 3 2 3 1 2 41 13.4 17.9 2 0 1 1 0 0 5 4 3 5 6 3 9 3 7 4 53 17.9 22.4 0 1 0 0 0 0 0 0. 0 4 6 1 1 0 4 0 .17 22.4 29.1 0 0 0 0 0 0 0 0 0 4 3 3 1 0 2 0 13 29.1 40.3 0 0 0 0 0 0 0 0 0 0 1 1 0 1 1 0 4 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 70 55 33 54 24 36 26 16 32 44 21 15 18 13 19 28 504 Wind Speed STABILITY CLASS: C Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 10 4 2 4" 2 8 4 1 1 1 0 1 1 1 2 8 50 2.2 4.5 10 4 9 6 7 15 13 5 6 1 3 2 5 8 5 9 108 4.5 6.7 11 14 15 a 5 7 16 16 13 9 3 5 4 3 5 10 144 6.7 8.9 7 8 10 5 5 4 a 6 16 10 3 3 10 0 3 10 .108 8.9 11.2 9 3 2 5 2 1 4 3 12 11 3 5 3 2 7 4 76 11.2 13.4 4 1 0 1 0 0 3 1 6 7 3 2 5 4 2 7 46 13.4 17.9 5 4 1 1 0 1 2 2 7 8 1 4 5 2 4 4 51 17.9 22.4 0 1 0 0 0 0 0 0 0 1 5 6 3 4 6 0 26 22.4 29.1 0 0 0 0 0 0 0 0 0 2 5 1 1 0 2 0 11 29.1 40.3 0 0 1 0 0 0 0 0 0 0 0 1 0 0 1 0 3 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .0 0 0 TOTALS 56 39 40 30 21 36 50 34 61 50 26 30 37 24 37 52 623 Wind Speed STABILITY CLASS: D Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 7 9 14 15 11 9 19 17 14 16 6 8 11 4 6 9 177 2.2 4.5 36 24 15 17 17 18 25 53 45 24. 18 14 16 25 39 44 430 4.5 6.7 53 29 20 13 8 12 28 55 49 39 16 16 10 12 46 70 476 6.7 8.9 27 17 11 16 9 4 12 45 55 24 13 7 13 10 32 56 351 8.9 11.2 24 11. 7 2 2 6 16 27 49 32 8 . 6 6 . 8 29 36 269 11.2 13.4 11 4 3 1 2 0 9 15 27 27 15 4 12 11 17 16 174 13.4 17.9 10 5 4 0 1 1 3 14 24 34 17 10 9 30 40 16 218 17.9 22.4 4 6 3 1 1 0 0 2 9 8 17 15 6 21 34 4 131 22.4 29.1 0 3 3 0 *0 0 0 .0 4 11 12 4 7 11 35 0 90 29.1 40.3 0 5 18 0 0 0 0 0 0 2 5 2 1 0 10 0. 43 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 172 113 98 65 51 50 112 228 276 217 127 86 91 132 290 251 2359 Columbia Generating Station 38 2009 Radioactive Effluent Report

Table 5-10 Year 2008, 245 Ft AGL (Continued)

Wind Speed STABILITY CLASS: E Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 5 2 4 7 7 7 8 8 9 5 3 7 6 8 4 4 94 2.2 4.5 16 13 9 12 11 9 18 16 23 18 19 25 14 18 28 37 286 4.5 6.7 27 19 14 10 9 5 8 18 26 16 7 16 10 19 38 45 287 6.7 8.9 21 9 6 13 1 7 14 35 25 14 10 7 13 18 46 36 275 8.9 11.2 17 14 4 2 1 0 10 22 24 19 12 7 17 22 49 31 251 11.2 13.4 7 4 3 1 0 3 9 16 24 28 13 5 14 26 50 14 217 13.4 17.9 8 2 3 1 0 1 5 24 39 45 36 10 20 53 71 28 346 17.9 22.4 2 1 4 1 0 1 6 8 10 30 35 8 7 55 37 1 206 22.4 . 29.1 0 0 3 2 0 0 1 3 2 16 30 8 5 13 16 0 99 29.1 40.3 0 0 1 0 0 0 0 0 0 2 10 3 0 1 1 0 18 40.3 90 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 I TOTALS 103 84 51 49 29 33 79 150 182 193 176 96 106 233 340 196 2080 Wind Speed STABIUTY CLASS: F Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 7 4 6 7 8 4 5 13 10 7 9 6 5 4 5 9 109 2.2 4.5 26 22 21 17 10 12 15 21 19 14 18 7 19 17 19 24 281 4.5 6.7 14 24 28 11 4 5 6 23 30 22 15 16 8 5 22 20 253 6.7 8.9 14. 18 14 9 0 2 11 21 37 23 13 5 4 11 22 30 234 8.9 11.2 9 7 9 1 0 0 13 31 36 17 4 3 7 11 30 22 200 11.2 13.4 5 1 3 2 0 0 9 17 16 21 9 1 2 13 19 12 130 13.4 17.9 3 1 3 2 0 0 3 16 36 25 9 1 6 28 33 9 175 17.9 22.4 0 0 0 0 0 1 3 6 5 5 4 0 3 14 8 0 49 22.4 29.1 0 0 0 0 0 0 0 0 2 1 3 0 1 0 3 0 10 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 78 77 84 49 22 24. 65 148 191 135 84 39 55 103 161 126 1441 Wind Speed STABILITY CLASS: G Min Max N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 8 10 3 6 6 11 2 7 17 8 4 5 5 7 4 3 106 2.2 4.5 26 21 27 24 9 11 16 23 24 28 11 14 6 6 11 9 266 4.5 6.7 38 28 19 11 3 2 10 22 31 19 14 7 4 3 11 29 251 6.7 8.9 19 10 13 8 1 0 3 23 23 11 8 5 1 1 7 30 163 8.9 11.2 12 6 4 5 0 1 3 9 13 7 0 2 1 4 12 28 107 11.2 13.4 1 0 2 1 0 0 0 12 11 7 3 0 1 3 21 9 71 13.4 17.9 2 0 0 2 0 0 2 7 12 7 2 0 0 4 17 3 58 17.9 22.4 0 0 0 1 0 0 0 0 1 0 0 *0 0 6 5 0 13 22.4 29.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 29.1 40.3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40.3 90 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TOTALS 106 75 68 58 19 25 36 103 132 87. 42 33 18 34 88 111 1035 Wind Speed STABILITY CLASS: ALL Min Max N NNE NE ENE E ES6 SE SSE S SSW SW WSW W WNW NW NNW TOTAL 1 2.2 42 33 30 42 36 40 38 46 51 37 22 27 28 25 24 35 556 2.2 4.5 132 102 99 98 71 82 90 118 118 86 69 64 62 75 102 131 1499 4.5 6.7 176 145 118 84 38 48 . 75 139 150 107 56 61 38 43 122 179 1579 6.7 8.9 114 100 67 62 21 20 56 133 165 90 47 27 41 42 113 166 1264 8.9 11.2 91 70 30 20 5 10 51 96 149 103 29 25 35 49 127 127 1017 11.2 13.4 37 20 12 8 3 4 34 63 94 103 47 16 37 60 110 60 708 13.4 17.9 33 21 12 7 1 3 22 68 124 138 74 29 50 123 173 64 942 17.9 22.4 8 12 7 3 1 2 9 16 26 55 67 36 26 101 93 5 472 22.4 29.1 0 4 6 2 0 0 1 3 8 35 54 21 15 24 61 0 234 29.1 40.3 0 . 5 20 0 0 0 0 0 0 5 17 9 2 3 13 0 74 40.3 90 0 0 0 0 0 0 0 0 0 0 1 0 0 1 1 0 3 TOTALS 633 512 401 326 176 209 376 682 885 759 4a3 315 334 546 944 767 8348 A B C 0 E F G TOTALS CALM 0 4 10 65 35 33 37 184 Occurrence of stability class on a percentage basis A 3.6%

6 6.0%

C 7.4%

D 28.4%

E 24.8%

F 17.3%

G 12.6%

Columbia Generating Station 39 2009 Radioactive Effluent Report

6.0 DOSE ASSESSMENT -- IMPACT ON MAN Liquid Effluents - There were no liquid discharges from the radwaste processing system to the Columbia River during calendar year 2009.

Gaseous Effluents - The NRC GASPAR II computer code was used to calculate doses at and beyond the site boundary using quarterly and annual meteorological data and site-specific variables as required and defined in the ODCM. Table 6-1 shows the highest calculated doses at the site boundary and beyond the site boundary. Table 6-1 also shows the quarterly and annual dose for the nearest and highest exposed resident identified in the land use census. Table 6-2 lists the annual 50-mile dose using values obtained from the ALARA annual integrated population dose summary (person-rem). Table 6-2 also provides the annual individual doses associated with each pathway. These values were obtained by dividing the ALARA integrated dose (person-rem) by the estimated year 2000 50-mile population (356,993) and converting to mrem.

The highest calculated dose to a child living at locations identified in the most recent land use census was 6.59E-04 mrem to the total body, 6.67E-04 mrem to the thyroid, and 1.03E-03 mrem to the skin. This location was at 4.24 miles in the East South East sector.

Periodically, Columbia Generating Station offers public tours of selected locations within the site boundary. Calculations assumed an eight (8) hour per year exposure to the plume, ground shine, and inhalation pathways. The organ with the highest dose was the skin at 6.16E-04 mrem.

During 2009, Members of the Public worked at the Industrial Development area in the E and ESE sectors of the owner controlled area. The maximum dose to these individuals was also calculated assuming adult exposure to the plume, inhalation, and ground deposition pathways.

The following table shows dose to Members of the Public from gaseous effluents within the site boundary of Columbia Generating Station for the total indicated hours spent at each location.

Total Body Thyroid Highest Other Beta Air Gamma Hours Dose Dose Organ Dose Dose Air Dose Location Spent (mrem) (mrem) (mrem) (mrad) (mrad)

Tour Visitors 8.OOE+00 3.84E-04 3.84E-04 6.16E-04 2.07E-04 5.56 E-04 WNP-4 Whse.2-4 1.30E+03 3.45E-03 3.45E-03 5.43E-03 9.16E-04 2.46E-03 WNP-1 Bldg 121 2.60E+03 3.67E-03 3.68E-03 5.78E-03 3.50E-03 9.37E-03 There was no measurable direct radiation contribution from Columbia Generating Station to the tour visitors or to the workers at the WNP-1 or WNP-4 industrial areas.

During the growing season, Columbia Generating Station conducts a five-mile land use census to determine the locations of nearest residents, gardens, and farm animals out to five miles in each sector. No change to land usage was found.

Columbia Generating Station 40 2009 Radioactive Effluent Report

The following table provides the results of annual dose calculations for the highest dose age group for each identified land use census location from gaseous effluents.

Highest Total Body Thyroid Other Organ Beta Gamma Dose Dose Dose Air Dose Air Dose Age Location (mrem) (mrem) (mrem) (mrad) (mrad) Group Resident (4.47 miles NE) 5.83E-04 5.86E-04 9.22E-04 3.OOE-04 8.03E-04 Teen Resident (4.01 miles ENE) 5.91E-04 5.94E-04 9.29E-04 3.OOE-04 8.03E-04 Adult Resident (4.59 miles E) 6.34E-04 6.40E-04 9.98E-04 3.26E-04 8.36E-04 Teen Resident (4.24 miles ESE) 6.66E-04 6.73E-04 1.04E-03 3.34E-04 8.56E-04 Teen The highest 'Other Organ' in all cases was the skin.

For environmental thermoluminescent dosimeter (TLD) stations at or beyond the site boundary where preoperational (background) data was acquired, no increase in the average ambient exposure was observed in 2009 from the preoperational values.

Columbia Generating Station 41 2009 Radioactive Effluent Report

Dose Tables Table 6-1 Summary of Doses from Gaseous Effluents The first six tables in this section show maximum estimated exposure and dose at and beyond the site boundary although no real person is resident in these areas.

The remaining tables contain exposure and dose estimates for locations with real residents.

1. Maximum Air Dose at the Site Boundary (1.2 miles) 1st 2nd 3rd 4th Annual Quarter Quarter Quarter Quarter Cumulative*

Beta air dose (mrad) 4.57E-03 8.40E-04 4.99E-04 2.1 OE-03 5.83E-03 Gamma air dose (mrad) 1.24E-02 2.27E-03 1.41E-03 5.35E-03 1.54E-02

2. Maximum Air Dose Beyond the Site Boundary 1st 2nd 3rd 4th Annual Quarter Quarter Quarter Quarter Cumulative*

Beta air dose (mrad) 2.75E-03 3.46E-04 2.05E-04 5.91E-04 3.27E-03 Gamma air dose (mrad) 7.51E-03 9.34E-04 5.79E-04 1.51E-03 8.76E-03

3. Maximum Annual Dose at the Site Boundary Annual Dose Annual total body dose (mrem) 1.17E-02 Annual skin dose (mrem) 1.84E-02

4. Maximum Annual Dose Beyond the Site Boundary Annual Dose Annual total body dose (mrem) 6.33E-03 Annual skin dose (mrem) 1.0OE-02 Station Generating Station 42 2009 Radioactive Effluent Report Columbia Generating 42 2009 Radioactive Effluent Report

Table 6-1 Summary of Doses from Gaseous Effluents (Continued)

5. Maximum Organ Dose at the Site Boundary (1.2 miles) 1st 2nd 3rd 4th Ann ual Quarter Quarter Quarter Quarter Cumulative*

Maximum Organ dose (mrem) 1.36E-02 3.06E-03 1.79E-03 6.08E-03 1.84E-02

6. Maximum Organ Dose Beyond the Site Boundary 1st 2nd 3rd 4th Annual Quarter Quarter Quarter Quarter Cumulative*

Maximum Organ dose (mrem) 8.23E-03 1.23E-03 7.05E-04 1.72E-03 1.OOE-02

7. Dose to Nearest Residents within 5-Miles in each Sector with Residents 4.47 Miles NE 1st 2nd 3rd 4th Ann ual Quarter Quarter Quarter Quarter Cumulative*

Beta Air Dose (mrad) 2.75E-04 3.71 E-05 1.50E-05 4.83E-05 3.OOE-04 Gamma Air Dose (mrad) 7.51E-04 1.OOE-04 4.26E-05 1.16E-04 8.03E-04 Maximum Organ dose (mrem) 8.23E-04 1.28E-04 5.16E-05 1.43E-04 9.22E-04 4.01 Miles ENE 1 st 2nd 3rd 4th Annual Quarter Quarter Quarter Quarter Cumulative*

Beta Air Dose (mrad) 2.20E-04 4.45E-05 5.77E-06 6.10E-05 3.OOE-04 Gamma Air Dose (mrad) 6.01 E-04 1.20E-04 1.63E-05 1.56E-04 8.03E-04 Maximum Organ dose (mrem) 6.64E-04 1.63E-04 2.40E-05 1.84E-04 9.29E-04 4,59 Miles E 1 st 2nd 3rd 4th Annual Quarter Quarter Q3Arte 4te nuul Beta Air Dose (mrad) 3.22E-04 1.76E-05 2.14E-05 2.48E-04 3.26E-04 Gamma Air Dose (mrad) 8.60E-04 4.52E-05 6.06E-05 6.32E-04 8.36E-04 Maximum Organ dose (mrem) 9.57E-04 7.97E-05 7.60E-05 7.19E-04 9.98E-04 43 2009 Radioactive Effluent Report Generating Station Columbia Generating Station ' 43 2009 Radioactive Effluent Report

Table 6-1 Summary of Doses from Gaseous Effluents (Continued)

7. Dose to Nearest Residents within 5-Miles in each Sector with Residents (Continued) 4.24 Miles ESE 1st 2nd 3rd 4th Annual Quarter Quarter Quarter Quarter Cumulative*

Beta Air Dose (mrad) 5.1OE-04 7.56E-05 1.24E-05 1.1OE-04 3.34E-04 Gamma Air Dose (mrad) 1.38E-03 2.01 E-04 3.51 E-05 2.66E-04 8.56E-04 Maximum Organ dose (mrem) 1.52E-03 2.72E-04 4.82E-05, 3.26E-04 1.04E-03

Rather than the sum of the quarters, these values are based on annual meteorological data and total annual effluents. For each time period, the dose estimate uses the radionuclide mix and release rate for that period along with an estimate of the dispersion in air and deposition on ground and vegetation calculated by the NRC computer code XOQDOQ using actual meteorological conditions as measured at the release point. The dose estimate of the NRC computer code GASPAR uses NRC Regulatory Guide 1.109 (1974) which includes the prospective dose component arising from retention in the body beyond the period of environmental exposure. In the case of the resident at 4.24 miles. ESE, the 'maximum organ' was the skin for each period of dose estimation.

Contributions to skin dose results from three major pathways; direct radiation exposure from the plume and nuclides deposited on the ground and exposure from inhaled activity (primarily tritium). Of these, the major contributor to dose was exposure of the skin to the plume, primarily Ar-41. Due to differences in atmospheric stability factors and wind conditions during the year, the estimated concentration of Ar-41 at 4.24 miles ESE resulted in a lower estimate of skin dose for the annual cumulative dose estimation.

Columbia Generating Station 44 2009 Radioactive Effluent Report

Table 6-2 50-Mile Population Dose from Gaseous Effluents A. 50-mile population collective dose Exposure Total Body Max. Organ Pathway (person-rem) (person-rem)

Plume 5.90E-03 1.15E-02 Ground 9.31E-04 1.09E-03 Inhalation 3.09E-03 3.09E-03 Vegetables 2.25E-03 2.21 E-03 Milk 8.13E-04 7.74E-04 Meat 4.1OE-04 3.96E-04 Total 1.34E-02 1..90E-02 B. Average Individual*

Exposure Total' Body Max. Organ Pathway (m rem) (mrem)

Plume 1.65E-05 3.22E-05 Ground 2.61 E-06 3.05E-06 Inhalation 8.66E-06 8.66E-06 Vegetables 6.30E-06 6.19E-06 Milk 2.28E-06 2.17E-06 Meat 1.15E-06 1.11E-06 Total 3.75E-05 5.34E-05

These values are derived by dividing the 50-mile population collective doses by the population within 50 miles of Columbia Generating Station (356,993). The population estimate is based on the 2000 census conducted by the United States Census Bureau and documented in the Columbia Generating Station Final Safety Analysis Report. The Maximum Organ was the thyroid.

Station 45 2009 Radioactive Effluent Report Columbia Generating Generating Station 45 2009 Radioactive Effluent Report

7.0 REVISIONS TO THE ODCM No revisions were made to the ODCM in 2009.

8.0 REVISIONS TO THE PROCESS CONTROL PROGRAM (PCP)

There were no revisions to the Process Control Program in 2009.

9.0 NEW OR DELETED LOCATIONS FOR DOSE ASSESSMENTS AND/OR ENVIRONMENTAL MONITORING LOCATIONS 9.1 No new locations were identified for dose assessments as the 2009 Five-Mile Land Use Census showed no changes.

9.2 There were no new locations for environmental monitoring formally adopted into the program based on the 2009 Land Use Census.

9.3 No dose assessment or environmental monitoring locations were deleted.

10.0 MAJOR CHANGES TO RADIOACTIVE LIQUID, GASEOUS, AND SOLID WASTE TREATMENT SYSTEMS No major changes (as defined by ODCM Section 6.4.3) were made to the radioactive waste systems (liquid, gaseous, or solid) during this reporting period.

46 2009 Radioactive Effluent Report Generating Station Columbia Generating Station 46 2009 Radioactive Effluent Report

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