Text

2010 Annual Radioactive Effluent Release Report, Enclosure 1
	ML11126A180
Person / Time
Site:	Watts Bar
Issue date:	04/28/2011
From:	; Tennessee Valley Authority
To:	; Office of Nuclear Reactor Regulation
References
	Download: ML11126A180 (66)
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Enclosure 1 Watts Bar Nuclear Plant 2010 Annual Radioactive Effluent Release Report

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010

1. Regulatory Limits A. Gaseous Effluents

1. Dose rates due to radioactivity released in gaseous effluents from the site to areas at and beyond the unrestricted area boundary shall be limited to the following:

a. Noble gases: - Less than or equal to 500 mrem/year to the total body.

- Less than or equal to 3000 mrem/year to the skin.

b. lodine-131, iodine-133, tritium, and all radionuclides in particulate form with half-lives greater than 8 days:

- Less than or equal to 1500 mrem/year to any organ.

2. Air dose due to noble gases released in gaseous effluents to areas at and beyond the unrestricted area boundary shall be limited to the following:

a. Less than or equal to 5 mrad for gamma radiation and less than or equal to 10 mrad for beta radiation during any calendar quarter.

b. Less than or equal to 10 mrad for gamma radiation and less than or equal to 20 mrad for beta radiation during any calendar year.

3. Dose to a member of the public from iodine-1 31, iodine-1 33, tritium, and all radionuclides in particulate form with half-lives greater than eight days in gaseous effluents released to areas at and beyond the unrestricted area boundary shall be limited to the following:

a. Less than or equal to 7.5 mrem to any organ during any calendar quarter.

b. Less than or equal to 15 mrem to any organ during any calendar year.

B. Liquid Effluents

1. The concentration of radioactivity released in liquid effluents to unrestricted areas shall be limited to 10 times the concentrations specified in Title 10 of the Code of Federal Regulations, Part 20 (Standards for Protection against Radiation),

Appendix B, Table 2, Column 2, for radionuclides other than dissolved or entrained noble gases. For dissolved or entrained noble gases, the concentration shall be limited to 2.0 E-04 jiCi/ml total activity.

2. The dose or dose commitment to a member of the public from radioactivity in liquid effluents released to unrestricted areas shall be limited to:

a. Less than or equal to 1.5 mrem to the total body and less than or equal to 5 mrem to any organ during any calendar quarter.

b. Less than or equal to 3 mrem to the total body and less than or equal to 10 mrem to any organ during any calendar year.

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WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010

2. Effluent Concentration Limits A. Liquids The Effluent Concentration Limits (ECL) for liquids are those listed in 10 CFR 20, Appendix B, Table 2, Column 2. For dissolved and entrained gases the ECL of 2.OE-04 gtCi/ml is applied. This ECL is based on the Xe-1 35 concentration in air (submersion dose) converted to an equivalent concentration in water as discussed in the International Commission on Radiological Protection (ICRP), Publication 2.

B. Gaseous Concentration limits for gaseous releases are met through compliance with the maximum permissible dose rates for gaseous releases as defined in plant Offsite Dose Calculation Manual (ODCM) and presented in Section 1.A.1 of this report.

3. Average Energy Watts Bar Nuclear Plant's (WBN) ODCM limits the dose equivalent rates due to the release of noble gases to less than or equal to 500 mrem/year to the total body and less than or equal to 3000 mrem/year to the skin. Therefore, the average beta and gamma energies (E) for gaseous effluents as described in Regulatory Guide 1.21, "Measuring, Evaluation, and Reporting Radioactivity in Solid Wastes and Releases of Radioactive Materials in Liquid and Gaseous Effluents from Light-Water-Cooled Nuclear Power Plants," are not applicable.

4. Measurements and Approximations of Total Radioactivity Radioactivity measurements performed in support of the WBN ODCM meet the Lower Limit of Detection requirements given in ODCM Tables 2.2-1 and 2.2-2.

A. Liquid Effluents Batch (Radwaste and Condensate Demineralizer tanks)

Total gamma isotopic and tritium concentrations are determined on each Radwaste batch tank prior to release. The total activity of a batch release is obtained by determining the concentration of each nuclide and then multiplying by the volume discharged to arrive at the curie activity for each nuclide. The curies of each nuclide are then summed. Composite samples are maintained and analyzed monthly for gross alpha and quarterly for iron-55, strontium-89, and strontium-90. During periods of no significant identified primary to secondary leakage, composite samples are not maintained for batch releases from the Condensate Demineralizer Tank releases.

During periods of no significant identified primary to secondary leakage or when the Condensate Demineralizer Tanks are discharged to the Turbine Building Station Sump, the feedwater tritium concentration is used to determine the curies of tritium released from Condensate Demineralizer Tank.

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WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 Continuous Releases (Turbine Building Station Sump (TBSS), Steam Generator Blowdown (SGB), and Groundwater Sump (GWS))

During periods of no significant identified primary to secondary leakage, the volume released from the TBSS and SGB is obtained. The TBSS tritium concentration is determined via weekly grab samples. The feedwater tritium concentration is used to determine the curies of tritium released from SGB. The GWS is sampled monthly and analyzed for gross gamma and tritium on a monthly basis and for Sr-89 and Sr-90 on a quarterly basis. The total activity released is obtained by determining the concentration of each nuclide and then multiplying by the volume discharged to arrive at the curie activity for each nuclide.

Monitoring Wells WBN started conducting an investigation of tritium releases to the groundwater in 2003 due to identification of tritium in three of the four newly installed on-site monitoring wells associated with the December 2002 Department of Energy tritium production program site preparation activity. This study involved pressure testing of the radwaste discharge line, evaporation calculations of the Spent Fuel Pool (SFP) and Refueling Water Storage Tank (RWST), installation and sampling of groundwater wells, inspection of drain lines, boroscopic investigation of the SFP, and Fuel Transfer Canal leak collection system channels and drains.

In addition to the six (6) Radiologocial Environmental Montioring Program (REMP) on-site groundwater monitoring wells, WBN also has 19 non-REMP monitoring wells to support monitoring the onsite groundwater plume for the presence or increase of radioactivity. WBN contracted with ARCADIS in 2004 to perform an investigation of the impact tritium had on groundwater and to perform a site characterization, area of impact, and preliminary human health and ecological risk screening. ARCADIS has been performing an updated site conceptula model during 2010 and should complete their evaluations later in 2011.

The on-site monitoring wells are sampled semi-annually for gamma and tritium. These wells continue to exhibit a downward trend. The tritium concentrations obtained in 2010 from these monitoring wells are listed below. Wells K and L samples were analyzed for Sr-89, Sr-90, Fe-55, and Ni-63, with no detectable results.

06/23/2010 10130/2010 Well ID Activity pCi/L Activity pCi/L B 3,189 1,732 C 759 1,000 F 3,134 2,117 H 2,484 Not Sampled I 411 <270 J 2,039 2183 K 14,564 15,262 L 7,237 6,155 R 2,232 2,426 E1-3

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 Onsite Radioactive Pills or Leaks as required by NEI 07-07 Release Type: Liquid Release Point: Turbine Building Station Sump Vacuum Breaker Date(s) of Release: 2/20/2007 through 04/14/2010 This evaluation is for the release to the environment that occurred from the Turbine Building Station Sump (TBSS) Vacuum Breaker. The vacuum breaker contains a two-inch check valve that opens to allow air to enter the piping when the TBSS discharge pumps are not energized and closes to prevent liquid from discharging to the environment when the pumps are energized. The check valve is located between the security fence and the sidewalk that leads from the West Security Portal to the parking lot. The check valve failed on 02/20/2007, resulting in water from the TBSS overflowing onto the grass when the TBSS pumps were energized.

The water from the TBSS vacuum breaker and soil around the area were sampled for gamma and tritium analyses on 04/14/2010. No gamma isotopes or tritium were identified in the soil samples and no gamma isotopes were identified in the liquid sample. The tritium concentration in the liquid sample was 810 pCi/L. On 04/14/2010, a hose was installed on the discharge of the vacuum breaker and routed to the nearest storm drain. On 09/14/2010, the check valve had been replaced and a large carboy installed to serve as a barrier to prevent a release to the ground if the check valve were to fail. The activities of the radionuclides released were accounted for in a weekly TBSS release permit.

Although the dose impacts to the public from this leak were included in each year's WBN Annual Effluent and Waste Disposal Report, the reported liquid doses to the public for each year would have been conservative since it had been assumed that the activity was released via an ODCM release pathway. The following data was used to determine the curies and dose impacts as a result of the release:

0 The volume released from the failed check valve was determined to be 1 liter for each minute the TBSS pumps ran.

The total run time in minutes for the TBSS pumps was obtained for each week during the event.

The weekly radionuclide concentrations for the TBSS were obtained.

Based on the weekly TBSS pump times and radionuclide concentrations the activity released via the failed valve was determined.

The radionuclide activity for each week was summed for each year (2007-2010).

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WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 Based on the above information and assumptions the following curies were released:

H-3 CO-58 CO-60 CR-51 FE-59 MN-54 NB-95 ZR-95 2007 1.85E-04 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 2008 1.34E-04 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 2009 5.46E-04 2.15E-05 1.68E-06 1.12E-05 8.OOE-07 1.17E-06 1.91E-06 2.03E-06 2010 5.98E-05 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00 Doses from 1-131 Water Ingestion Pathway The radiological environmental monitoring program (REMP) specified in Table 3.12-1 from NUREG 1301, "Offsite Does Calculation Manual Guidance: Standard Radiological Effluent Controls for Pressurized Water Reactors," April 1991, requires an 1-131 specific analysis for drinking water pathway samples if the annual dose from 1-131 is greater than 1 mrem. To evaluate the need for implementation of this additional analysis, the drinking water pathway dose from 1-131 to the maximum organ and age group was calculated. The results reported confirm that the drinking water pathway dose from 1-131 was only a small fraction of the 1 mrem limit and that the performance of the 1-131 specific analysis is not required for WBN REMP drinking water samples.

Quarter 1 2 3 4 Totals 1-131 Ci 0.OOE+0O 0.OOE+00 0.OOE+00 9.65E-03 9.65E-03 Child/Thyroid (mrem) 0.OOE+00 0.OOE+0O 0.OOE+00 6.90E-03 6.90E-03 Population/Thyroid (mrem) 0.OOE+00 0.OOE+00 0.OOE+00 4.10E-02 4.1OE-02 E1-5

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 B. Gaseous Effluents Fission and Activation Gases Airborne effluent gaseous activity is continuously monitored and recorded. Weekly grab samples from the Auxiliary Building and monthly grab samples from the Service Building are taken and analyzed to determine the quantity of noble gas activity released based on the total flows for the sample period. Also, noble gas samples are collected and evaluated following startup, shutdown, or rated thermal power change exceeding 15 percent within one hour. Sampling is only required if dose equivalent 1-131 concentration in the primary coolant or if the noble gas activity monitor indicates that the containment activity has increased more than a factor of three.

The concentration of noble gases released through the Shield Building exhaust due to purging of containment is determined by using the purge monitor response in combination with containment air samples obtained prior to purge. The quantity of activity released during the purge is determined using the duration, flowrate, and concentration of noble gases for each purge. Also, noble gas samples are collected and evaluated for ongoing containment purges following startup, shutdown, or rated thermal power change exceeding 15 percent within one hour. Sampling is only required if DEI concentration in the primary coolant or if the noble gas activity monitor shows that the containment activity has increased more than a factor of three.

The quantity of noble gases released through the Shield Building exhaust due to the batch release of waste gas decay tanks is determined by sampling each tank prior to release. The total activity released is determined from the total pressure change recorded for the tank during the release.

lodines and Particulates in Gaseous Releases Iodine and particulate activity are continuously sampled. Weekly charcoal and particulate samples are taken from the Shield Building exhaust and auxiliary building exhausts and from the Condenser Vacuum Exhaust during periods of primary to secondary leakage. These samples are analyzed at least weekly to determine the total activity released from the plant based on the total vent flows recorded for the sampling period. Also, when a primary to secondary leak exists, particulate and charcoal samples are taken from the Shield Building Exhausts, Auxiliary Building Exhaust, and Condenser Vacuum Exhaust once per 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months for 7 days following startup, shutdown, or a rated thermal power change exceeding 15 percent within one hour if dose equivalent 1-131 concentration in the primary coolant or the noble gas activity monitor shows that the containment activity has increased more than a factor of three.

Carbon-14 in Gaseous Releases The Carbon-14 production and effluent source term estimates were based on EPRI methodology provided in EPRI Report 1021106, "Estimation of Carbon-14 in Nuclear Power Plant Gaseous Effluents," December 2010. It was determined that 10.6 curies of Carbon-14 is generated annually at WBN. However, only 98% is considered released as gas and only the carbon dioxide form (20%) of that is used in the gaseous dose calculations.

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WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010

5. Batch Releases Value 1st Half 2nd Half Units A. Liquid (Radwaste only)

1. Number of releases 36 130 Each

2. Total time period of releases 5348 22,586 Minutes

3. Maximum time period of release 386 1,893 Minutes

4. Average time period of releases 149 174 Minutes 17 100 Minutes

5. Minimum time period for release 29,035 21,273 CFS

6. Average dilution stream flow during release periods B. Gaseous (Batches only - containment purges, and waste gas decay tanks) 7 16 Each

1. Number of releases 966 10,209 Minutes

2. Total time period of releases 653 3,155 Minutes 138 638 Minutes

3. Maximum time period for release 2 3 Minutes

4. Average time period for releases

5. Minimum time period for release

6. Abnormal Releases Value Units 1st Half 2nd Half A. Liquid Number of Releases 1 0 Total Activity Released 5.98E-05* 0.OOE+00 Ci B. Gaseous Number of Releases 1 2 Total Activity Released 1.88E-01** 2.19E-01* Ci 2.22E-03***

Turbine Building Station Sump Vacuum Breaker

- Tear in Auxiliary Building Flex Duct PORV's Release E1-7

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 Abnormal Releases Release Type: Liquid Release Point: Turbine Building Station Sump Vacuum Breaker Date(s) of Release: 01/01/2010 through 04/14/2010 This evaluation is for the release to the environment that occurred from the Turbine Building Station Sump (TBSS) Vacuum Breaker. The vacuum breaker contains a 2 inch check valve that opens to allow air to enter the piping when the TBSS discharge pumps are not energized and closes to prevent liquid from discharging to the environment when the pumps are energized.

The check valve is located between the security fence and the sidewalk that leads from the West Security Portal to the parking lot. The check valve failed on 02/20/2007, resulting in water from the TBSS overflowing onto the grass when the TBSS pumps were energized.

The water from the TBSS vacuum breaker and soil around the area were sampled on 04/14/2010. On 04/14/2010, a hose was installed on the discharge of the vacuum breaker and routed to the nearest storm drain. On 09/14/2010, the check valve had been replaced and a large carboy installed to serve as a barrier to prevent a release to the ground if the check valve were to fail. The following is data used to determine the curies and dose impacts as a result of the release that occured during 2010:

The volume released from the failed check valve was determined to be 1 liter for each minute the TBSS pumps ran.

The total run time in minutes for the TBSS pumps was obtained for each week during the event.

The weekly radionuclide concentrations for the TBSS were obtained.

Based on the weekly TBSS pump times and radionuclide concentrations the activity released via the failed valve was determined.

The radionuclide activity for each week was summed for the period the released occurred in 2010.

Based on the above information and assumptions the following 5.98E-05 curies of tritium were released.

The activity of the tritium released was accounted for in weekly TBSS release permits.

Therefore, the dose impacts to the public from this release where included in this year's WBN Annual Effluent and Waste Disposal Report. The reported liquid doses to the public for this year would have been conservative since it was assumed that the activity was released via an ODCM release pathway.

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WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 Abnormal Releases Release Type: Gaseous (Steam)

Release Point: Unit 1 PORV's Date(s) of Release: 11/14/2010 1330 through 11/17/2010 1400 This evaluation is for the release to the environment that occurred from the Unit 1 Power Operated Relief Valves (PORV) following a reactor trip on November 14, 2010. Following the reactor trip on November 14, 2010, the Steam Generator PORVs were open for periods of time during the following 3 days. The following is data used to determine the curies and dose impacts as a result of the release:

While all the PORVs were not open continuously during this period, the evaluation assumed the release was continuous from all four PORVs.

During Cycle 10, there have been no gamma emitting radionuclides identified in any Secondary Coolant samples.

The feedwater tritium results obtained on 11/15/2010 indicated a tritium concentration of 4.116E-06 pCi/ml. This tritium concentration is assumed to have been the initial concentration in all four steam generators with no additional tritium introduced into the generators during the release period. All of the tritium initially present in the generators was released through the PORVs during the event.

The volume of each steam generator was taken from Chemistry Manual Chapter 5.01. The listed normal water level value of 4750 ft3 was used as a conservative value. This calculation assumes that the total volume of all four generators was released and that all the tritium present in that initial volume was released. The calculation of the total activity of H-3 released is as follows:

4750 ft3/generator

2.832E+04 ml/ft3

4 generators = 5.38E+08 ml 4.116E-06 pCi/ml

5.380E+08 ml = 2.22E+03 pCi of H3 or 2.22E-03 Ci of H3 The activity of 1.515E-03 curies was added to the 4th Quarter Table 4-A, "Curies Released in Gaseous Ground Level Releases," and the 4th Quarter doses in Table 6-B, "Doses from Airborne Effluents."

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WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 Abnormal Releases Release Type: Gaseous Release Point: Tear in Auxiliary Building Flex Duct Date(s) of Release: 01/01/2010 0000 through 10/24/2010 1050 This evaluation is for the release to the environment that occurred from a two tears on the discharge side of 1A and 1B fan in the Auxiliary Building Flex duct. The following is data used to determine the curies and dose impacts as a result of the release:

Engineering provided release rates based on equations from plant procedures as 1A tear = 2626 cfm and 1B tear = 23 cfm.

" Weekly minutes that the auxiliary building exhaust fans were inservice was obtained for the release period.

The weekly radionuclide concentrations for the Auxiliary Building release permits were obtained.

Based on the weekly minutes, estimated total flow of 2649 cfm and each identified radionuclide concentrations in uCi/cc, the activity released via the tears was determined.

The radionuclide activity for each quarter was summed for the period the released occurred in 2010.

Based on the above information and assumptions the following was curies were released:

Quarter H3 Co-58 Xe-133 Xe-135 1-131 1 3.81 E-02 2.07E-07 2.83E-02 4.42E-02 0.OOE+00 2 7.77E-02 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 3 1.18E-01 0.OOE+00 1.47E-02 1.48E-02 6.26E-09 4 7.17E-02 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 The activity of each radionuclide was added to the appropriate quarter and is included in Table 4-A, "Curies Released in Gaseous Ground Level Releases," and the associated doses in Table 6-B, "Doses from Airborne Effluents."

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WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 1-A Liquid Effluents - Summation of All Releases During the period Starting: 1-Jan-2010 Ending: 30-Jun-2010 Est.

Tot Type Of Effluent Units Quarter I Quarter 2 Error A. Fission & Activation Products

1. Total Release (Not Including Tritium, Ci 4.14E-03 7.46E-03 25%

Gases, Alpha)

2. Average Diluted Concentration During pCi/mi 4.79E-10 5.04E-10 Period

3. Percent Of Applicable Limit %*

B. Tritium

1. Total Release Ci 1.42E+01 1.07E+02 18%

2. Average Diluted Concentration During pCi/ml 1.64E-06 7.22E-06 Period

3. Percent Of Applicable Limit %

C. Dissolved And Entrained Gases

1. Total Release Ci 5.96E-06 1.45E-04 39%

2. Average Diluted Concentration During pCi/ml 6.90E-13 9.79E-12 Period

3. Percent Of Applicable Limit % 3.45E-07 4.89E-06 D. Gross Alpha Radioactivity

1. Total Release Curies O.OOE+00** O.OOOE+00 N/A***

E. Total Waste Volume Released Liters 2.49E+08 2.87E+08 2%

(Pre-Dilution)

F. Volume Of Dilution Water Used Liters 8.64E+09 1.48E+10 12%

G. Radwaste Volume Released Liters 3.47E+05 1.32E+06 12%

A Applicable limits are expressed in terms of dose. See Table 7A of this report.

** A Zeroes in this table indicate that no radioactivity was present at detectable levels.

N/A - Errors in measurements are not reported for these values since none were identified during the reporting period.

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WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 1-B Liquid Effluents - Summation of All Releases During the period Starting: 1-Jul-2010 Ending: 31-Dec-2010 Est. Tot Type Of Effluent Units Quarter 3 Quarter 4 Error %

A. Fission & Activation Products

1. Total Release (Not Including Ci 1.29E-02 2.35E-02 25%

Tritium, Gases, Alpha)

2. Average Diluted Concentration pCi/ml 7.30E-10 1.85E-09 During Period

3. Percent Of Applicable Limit %*

B. Tritium

1. Total Release Ci 4.37E+02 1.14E+03 18%

2. Average Diluted Concentration pCi/ml 2.47E-05 8.97E-05 During Period

3. Percent Of Applicable Limit %

C. Dissolved And Entrained Gases

1. Total Release Ci 2.87E-03 2.86E-02 39%

2. Average Diluted Concentration pCi/ml 1.62E-10 2.25E-09 During Period

3. Percent Of Applicable Limit % 8.12E-05 1.13E-03 D. Gross Alpha Radioactivity

1. Total Release Ci O.OOE+00** 0.OOE+00 N/A***

E. Total Waste Volume Released Liters 2.38E+08 1.83E+08 2%

(Pre-Dilution)

F. Volume Of Dilution Water Used Liters 1.77E+10 1.27E+10 12%

G. Radwaste Volume Released Liters 3.84E+06 2.65E+06 12%

Applicable limits are expressed in terms of dose. See Table 7B of this report.

- Zeroes in this table indicate that no radioactivity was present at detectable levels.

N/A - Errors in measurements are not reported for these values since none were identified during the reporting period.

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WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 2-A Curies Released in Liquid Effluents During the period Starting: 1-Jan-2010 Ending: 31-Mar-2010 CONTINUOUS BATCH TOTAL H-3 2.29E-01 1.40E+01 1.42E+01 FISSION & ACTIVATION PRODUCTS CO-58 0.OOE+00 1.34E-03 1.34E-03 CO-60 0.0OE+00 9.45E-05 9.45E-05 CS-137 0.OE+00 2.24E-06 2.24E-06 FE-55 0.OOE+00 2.61 E-03 2.61 E-03 SB-122 0.OOE+00 2.42E-06 2.42E-06 SR-89 0.OOE+00 9.03E-05 9.03E-05 TOTALS 0.OOE+00 4.14E-03 4.14E-03 DISSOLVED AND ENTRAINED GASES XE-1 33 0.OOE+00 5.96E-06 5.96E-06 TOTALS 0.OOE+00 5.96E-06 5.96E-06

Zeroes in this table indicate that no radioactivity was present at detectable levels.

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WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 2-B Curies Released in Liquid Effluents During the period Starting: 1-Apr-2010 Ending: 30-Jun-2010 CONTINUOUS BATCH TOTAL H-3 3.80E-01 1.07E+02 1.07E+02 FISSION & ACTIVATION PRODUCTS CO-57 0.OOE+00 2.68E-06 2.68E-06 CO-58 0.OOE+00 1.88E-03 1.88E-03 CO-60 0.OOE+00 1.59E-04 1.59E-04 FE-55 0.OOE+00 5.28E-03 5.28E-03 MN-54 0.OOE+00 3.88E-06 3.88E-06 SR-89 0.0OE+00 1.33E-04 1.33E-04 TOTALS 0.OOE+00 7.46E-03 7.46E-03 DISSOLVED AND ENTRAINED GASES XE-133 0.OOE+00 1.16E-04 1.16E-04 XE-1 35 0.OOE+00 2.88E-05 2.88E-05 TOTALS 0.OOE+00 1.45E-04 1.45E-04

Zeroes in this table indicate that no radioactivity was present at detectable levels.

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WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 2-C Curies Released in Liquid Effluents During the period Starting: 1-Jul-2010 Ending: 30-Sep-2010 CONTINUOUS BATCH TOTAL H-3 4.36E-01 4.37E+02 4.37E+02 FISSION & ACTIVATION PRODUCTS CO-57 0.O0E+00 7.22E-06 7.22E-06 CO-58 0.OOE+00 1.13E-03 1.13E-03 CO-60 0.OOE+00 6.28E-04 6.28E-04 CR-51 0.OOE+00 2.21 E-05 2.21 E-05 CS-1 34 0.OOE+00 1.11 E-04 1.11 E-04 CS-137 0.OOE+00 5.81E-04 5.81E-04 FE-55 0.OOE+00 1.01 E-02 1.01E-02 MN-54 0.OOE+00 4.69E-05 4.69E-05 SB-125 0.OOE+00 2.51 E-04 2.51 E-04 TOTALS 0.O0E+00 1.29E-02 1.29E-02 DISSOLVED AND ENTRAINED GASES KR-85 0.OOE+00 7.14E-04 7.14E-04 KR-85M 0.OOE+00 2.44E-06 2.44E-06 XE-133 0.OOE+00 1.89E-03 1.89E-03 XE-1 33M 0.OOE+00 5.05E-06 5.05E-06 XE-135 0.OOE+00 2.53E-04 2.53E-04 TOTALS 0.O0E+00 2.87E-03 2.87E-03

Zeroes in this table indicate that no radioactivity was present at detectable levels.

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WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 2-D Curies Released in Liquid Effluents During the period Starting: 1-Oct-2010 Ending: 31-Dec-2010 CONTINUOUS BATCH TOTAL H-3 3.10E-01 1.14E+03 1.14E+03 FISSION & ACTIVATION PRODUCTS CO-57 O.OOE+00 3.56E-05 3.56E-05 CO-58 0.OOE+00 1.12E-03 1.12E-03 CO-60 O.OOE+00 4.61 E-03 4.61 E-03 CR-51 O.OOE+00 5.97E-06 5.97E-06 CS-1 34 O.OOE+00 4.34E-04 4.34E-04 CS-1 37 O.OOE+00 2.32E-03 2.32E-03 FE-55 O.OOE+00 3.78E-03 3.78E-03 1-131 O.OOE+00 9.65E-03 9.65E-03 1-133 O.OOE+00 2.62E-05 2.62E-05 MN-54 O.OOE+00 6.50E-04 6.50E-04 MO-99 O.OOE+00 8.18E-06 8.18E-06 NA-24 O.OOE+00 9.13E-06 9.13E-06 NB-95 O.OOE+00 7.47E-06 7.47E-06 RB-88 O.OOE+00 1.97E-05 1.97E-05 SB-122 O.OOE+00 1.22E-05 1.22E-05 SB-125 O.OOE+00 8.09E-04 8.09E-04 TC-99M O.OOE+00 8.18E-06 8.18E-06 TOTALS O.OOE+00 2.35E-02 2.35E-02 DISSOLVED AND ENTRAINED GASES AR-41 O.OOE+00 2.05E-05 2.05E-05 KR-85M O.OOE+00 2.55E-05 2.55E-05 XE-1 31 M O.OOE+00 1.16 E-04 1.16E-04 XE-1 33 O.OE+00 2.64E-02 2.64E-02 XE-1 33M O.OOE+00 3.67E-04 3.67E-04 XE-1 35 O.OOE+00 1.63E-03 1.63E-03 TOTALS O.OOE+00 2.86E-02 2.86E-02

Zeroes in this table indicate that no radioactivity was present at detectable levels.

El-16

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 3-A Gaseous Effluents - Summation of All Releases During the period Starting: 1-Jan-2010 Ending: 30-Jun-2010 Est. Tot Type Of Effluent Units Quarter I Quarter 2 Error %

A. Fission & Activation Products

1. Total Release Ci 4.38E-01 2.58E-01 22

2. Average Release Rate For Period pCi/sec 5.64E-02 3.29E-02

3. Percent Of Applicable Limit %*

B. Radioiodines

1. Total Iodine-131 Ci O.OOOE+00 O.OOOE+00 N/A***

2. Average Release Rate For Period pCi/sec O.OOOE+00 O.OOE+00

3. Percent Of Applicable Limit %*

C. Particulates

1. Particulates (Half-Lives>8 Days) Ci 1.36E-05 O.OOOE+00 15

2. Average Release Rate For Period pCi/sec 1.75E-06 O.OOOE+00

3. Percent Of Applicable Limit %* *

4. Gross Alpha Radioactivity Ci O.OOE+00 O.OOOE+00 N/A***

D. Tritium

1. Total Release Ci 2.77E+00 9.02E+00 11

2. Average Release Rate For Period pCi/sec 3.56E-01 1.15E+00

3. Percent Of Applicable Limit %*

E. Carbon-14

1. Total Release Ci 2.66E+00 2.56E+00 N/A

2. Average Release Rate For Period pCi/sec 3.43E-01 3.26E-01

3. Percent Of Applicable Limit

l Applicable limits are expressed in terms of dose. See Table 6A of this report.

- * / Zeroes in this table indicate that no radioactivity was present at detectable levels.

N/A - Errors in measurements are not reported for these values since none were identified during the reporting period.

E1-17

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 3-B Gaseous Effluents - Summation of All Releases During the period Starting: 1-Jul-2010 Ending: 31-Dec-2010 Est. Tot Type Of Effluent Units Quarter 3 Quarter 4 Error %

A. Fission & Activation Products

1. Total Release Ci 2.04E+00 4.67E+00 22

2. Average Release Rate For Period pCi/sec 2.57E-01 5.88E-01

3. Percent Of Applicable Limit %*

B. Radioiodines

1. Total Iodine-131 Ci 5.45E-07 O.OOOE+00 12

2. Average Release Rate For Period pCi/sec 6.86E-08 O.OOOE+00

3. Percent Of Applicable Limit %*

C. Particulates

1. Particulates (Half-Lives>8 Days) Ci O.OOE+00 O.OOOE+00 15

2. Average Release Rate For Period pCi/sec O.OOOE+00 O.OOOE+00 3.

4. Percent Of Applicable Gross Alpha Limit Radioactivity %*

Ci O.OOE+00 O.OOOE+00 ***N/A D. Tritium

1. Total Release Ci 7.62E+00 5.87E+00 11

2. Average Release Rate For Period pCi/sec 9.59E-01 7.39E-01

3. Percent Of Applicable Limit %*

E. Carbon-14

1. Total Release Ci 2.74E+00 2.64E+00 N/A

2. Average Release Rate For Period pCi/sec 3.45E-01 3.29E-01

3. Percent Of Applicable Limit Applicable limits are expressed in terms of dose. See Table 6-B of this report.

Zeroes in this table indicate that no radioactivity was present at detectable levels.

N/A - Errors in measurements are not reported for these values since none were identified during the reporting period.

E1-18

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 4-A Curies released in Gaseous Ground Level Releases During the period Starting: 1-Jan-201 0 Ending: 31 -Mar-201 0 CONTINUOUS BATCH TOTAL FISSION GASES XE-1 33 1.71E-01 0.OOE+00 1.71 E-01 XE-1 35 2.67E-01 0.OOE+00 2.67E-01 KR-85 0.00E+00 7.16E-07 7.16E-07 TOTALS 4.38E-01 7.16E-07 4.38E-01 IODINES 0.OOE+00 0.OOE+00 0.00E+00 PARTICULATES CO-58 1.36E-05 0.OOE+00 1.36E-05 TOTALS 1.36E-05 0.OOE+00 1.36E-05 H-3 2.77E+00 2.45E-06 2.77E+00 C-14 (Total) 2.66E+00 0.00E+00 2.66E+00 C-14 (C02 Form) 5.31E-01 0.O0E+00 5.31 E-01

Zeroes in this table indicate that no radioactivity was present at detectable levels.

El-19

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 4-B Curies released in Gaseous Ground Level Releases During the period Starting: 1-Apr-2010 Ending: 30-Jun-2010 CONTINUOUS BATCH TOTAL FISSION GASES XE-135 0.OOE+00 1.14E-03 1.14E-03 AR-41 0.OOE+00 1.11E-01 1.11E-01 XE- 133 O.OOE+00 1.46E-01 1.46E-01 TOTALS O.OOE+00 2.58E-01 2.58E-01 IODINES O.OE+00 O.OOE+00 0.OOE+00 PARTICULATES O.OOE+00 O.OOE+00 O.OQE+00 H-3 9.02E+00 4.60E-06 9.02E+00 C-14 (Total) 2.56E+00 O.OOE+00 2.56E+00 C-14 (C02 Form) 5.13E-01 O.OOE+00 5.13E-01

Zeroes in this table indicate that no radioactivity was present at detectable levels.

E1-20

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 4-C Curies released in Gaseous Ground Level Releases During the period Starting: 1-Jul-2010 Ending: 30-Sep-2010 CONTINUOUS BATCH TOTAL FISSION GASES KR-85 O.O0E+00 2.86E-06 2.86E-06 XE-133M O.OOE+O0 6.07E-05 6.07E-05 XE-135 7.58E-01 6.74E-03 7.66E-01 XE-131M O.OOE+O0 2.90E-02 2.90E-02 XE- 133 7.79E-01 1.69E-01 9.48E-01 AR-41 O.OOE+00 2.98E-01 2.98E-01 TOTALS 1.54E+00 5.03E-01 2.04E+00 IODINES 1-131 5.45E-07 Q.OOE+00 5.45E-07 TOTALS 5.45E-07 O.OOE+00 5.45E-07 PARTICULATES O.OOE+00 O.OOE+00 O.OOE+00 H-3 7.62E+00 O.OOE+00 7.62E+00 C-14 (Total) 2.74E+00 O.OOE+00 2.74E+00 C-14 (C02 Form) 5.47E-01 O.OOE+00 5.47E-01

Zeroes in this table indicate that no radioactivity was present at detectable levels.

El-21

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 4-D Curies released in Gaseous Ground Level Releases During the period Starting: 1-Oct-201 0 Ending: 31 -Dec-201 0 CONTINUOUS BATCH TOTALS FISSION GASES KR-85 O.OOE+O0 1.72E-07 1.72E-07 XE-135 O.OOE+00 4.59E-02 4.59E-02 XE-133 O.OOE+00 1.42E+00 1.42E+00 AR-41 0.OOE+00 3.20E+00 3.20E+00 TOTALS 0.OOE+00 4.67E+00 4.67E+00 IODINES O.OOE+00 O.OOE+00 O.OOE+00 PARTICULATES Q.OOE+00 0.OOE+00 0.OOE+00 H-3 5.87E+00 0.00E+00 5.87E+00 C-14 (Total) 2.64E+00 0.OOE+00 2.64E+00 C-14 (C02 Form) 5.29E-01 0.00E+00 5.29E-01

Zeroes in this table indicate that no radioactivity was present at detectable levels.

E1-22

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 5-A SOLID WASTE (RADIOACTIVE SHIPMENTS)

A. Solid Waste Shipped Offsite for Burial or Disposal (not Irradiated Fuel) 12 Month Est. (Ci)

1. Type of Waste Unit Period Error %

a. Spent resins, filters, sludges, evaporator m3 5.51 N/A bottoms, etc. Ci 16.34 +/-25%

3

b. Dry Active Waste, Compressible Waste m 282.0 N/A Contaminated Equipment, etc. Ci 0.135 +/-25%

m3

c. Irradiated Components, Control None N/A Rods, etc. Ci None N/A

2. Estimate of Maior Nuclide Composition (by type of waste)

a. Spent resins, filter sludges, evaporator bottoms, etc.

(nuclides determined by measurement) Percent Ci (PercentCutoff = 1.0 percent)

Mn-54 1.473 2.08E-01 Fe-55 5.584 7.87E-01 Co-58 57.791 8.15E+00 Co-60 6.387 9.OOE-01 Ni-63 22.334 3.15E+00 Sb-125 3.061 4.31 E-01 Cs-137 1.531 2.16E-01

b. Dry active waste, compressible waste, contaminated equipment, etc. (nuclides determined by estimate)Percent Cutoff = 1.0 percent)

Percent Ci Mn-54 2.215 2.98E-03 Fe-55 39.243 5.28E-02 Co-58 23.654 3.18E-02 Co-60 20.310 2.73E-02 Ni-63 6.295 8.47E-03 Zr-95 2.587 3.48E-03 Nb-95 3.373 4.54E-03

c. Irradiated Components None NIA NIA E1-23

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 5-B SOLID WASTE (RADIOACTIVE SHIPMENTS)

3. Solid Waste Disposition Number of Shipments Mode of Transportation Destination 5 Motor Freight Duratek Inc. (Bear Creek) 4 Motor Freiqht v

Duratek Radwaste Processin g (GRF)

4. Irradiated Fuel Shipments (Disposition)

Number of Shipments Type Quantity Mode of Transportation Destination None N/A N/A N/A

5. Solidification of Waste Was solidification performed? No If yes, solidification media: N/A El-24

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 Radiological Impact Introduction Potential doses to maximum individuals and the population around WBN are calculated for each quarter as required in Section 5.2 of the Offsite Dose Calculation Manual (ODCM). Measured plant releases for the reporting period are used to estimate these doses. Dispersion of radioactive effluents in the environment is estimated using meteorological data and riverflow data measured during the period. In this report, the doses resulting from releases are described and compared to limits established for WBN.

Dose Limits The ODCM specifies limits for the release of radioactive effluents, as well as limits for doses to the general public, from the release of radioactive effluents. These limits are set well below the Technical Specification limits which govern the concentrations of radioactivity and doses permissible in unrestricted areas. This ensures that radioactive effluent releases are As Low As Reasonably Achievable.

Dose Calculations -

Estimated doses to the public are determined using computer models (the Gaseous Effluent Licensing Code, GELC, and the Quarterly Water Dose Assessment Code (QWATA)). These models are based on guidance provided by the NRC (in Regulatory Guides 1.109, 1.111 and 1.113) for determining the potential dose to individuals and populations living in the vicinity of the plant. The area around the plant is analyzed to determine the pathways through which the public may receive a dose. The doses calculated are a representation of the dose to a "maximum exposed individual." Some of the factors used in these calculations (such as ingestion rates) are maximum values. Many of these factors are obtained from NUREG/CR-1004. The values chosen will tend to overestimate the dose to this "maximum" person. The expected dose to actual individuals is lower. The calculated doses are presented in Tables 6A, 6B, 7A and 7B.

Doses From Airborne Effluents For airborne effluents, the public can be exposed to radiation from several sources: direct radiation from the radioactivity in the air, direct radiation from radioactivity deposited on the ground, inhalation of airborne radioactivity, ingestion of vegetation which contains radioactivity deposited from the atmosphere, and ingestion of milk and beef which contains radioactivity deposited from the atmosphere onto vegetation and subsequently eaten by milk and beef animals.

Airborne DischarqePoints All releases from WBN are considered ground-level releases. The ground-level Joint Frequency Distribution (JFD) is derived from wind speeds and directions measured 10 meters above ground and from the vertical temperature difference between 10 and 46 meters, as presented for each quarter on pages E1-36 through E1-63.

E1-25

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 Radiological Impact MeteorologicalData Meteorological variables at WBN are measured continuously. Measurements collected include wind speed, wind direction, and temperature at heights of 10, 46, and 91 meters above the ground. Quarterly JFDs are calculated for each release point using the appropriate levels of meteorological data. A JFD provides the percentage of the time in a quarter that the wind is blowing out of a particular upwind compass sector in a particular range of wind speeds for a given stability class A through G. The wind speeds are divided into nine wind speed ranges.

Calms are distributed by direction in proportion to the distribution of non-calm wind directions less than 0.7 m/s (1.5 mph). Stability classes are determined from the vertical temperature difference between two measurement levels.

External Exposure Dose Dose estimates for maximum external air dose (gamma-air and beta-air doses) are made for points at and beyond the unrestricted area boundary as described in the WBN ODCM. The highest of these doses is then selected.

Submersion Dose External doses to the skin and total body, due to submersion in a cloud of noble gases, are estimated for the nearest residence in each sector. The residence with the highest dose is then selected from all sectors.

Organ Dose Doses to organs due to releases of airborne effluents are estimated for the inhalation, ground contamination, and ingestion pathways. The ingestion pathway is further divided into possible contributing pathways: ingestion of cow/goat milk, ingestion of beef, and ingestion of vegetables. Doses from applicable pathways are calculated for each real receptor location identified in the most recent land use survey. To determine the maximum organ dose, the doses from the pathways are summed for each receptor.

For the ingestion dose, only those pathways that exist for each receptor are considered in the sum. Milk ingestion doses are included only for locations where milk is consumed without commercial preparation and vegetable ingestion is included only for those locations where a garden is identified. Since specific data on beef animals were not available, the location of the highest beef dose for all receptors within an age group will be considered the beef dose for each receptor within that age group. For ground contamination, the dose added to the organ dose being calculated is the total body dose calculated for that location. It is assumed that the dose to an individual organ is equal to the total body dose.

Doses from airborne effluents are presented in Tables 6A and 68.

El-26

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 Doses From Liquid Effluents For liquid effluents, the public can be exposed to radiation from three sources: the ingestion of water from the Tennessee River, the ingestion of fish caught in the Tennessee River, and direct exposure from radioactive material deposited on the river shoreline sediment (recreation).

E1-27

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 Radiological Impact The concentrations of radioactivity in the Tennessee River are estimated by a computer model which uses measured hydraulic data downstream of WBN. Parameters used to determine the doses are based on guidance given by the NRC (in Regulatory Guide 1.109) for maximum ingestion rates, exposure times, etc. Wherever possible, parameters used in the dose calculation are site specific use factors determined by TVA. The models that are used to estimate doses, as well as the parameters input to the models, are described in detail in the WBN ODCM.

Liquid Release Points and River Data Radioactivity concentrations in the Tennessee River are calculated assuming that releases in liquid effluents are continuous. All routine liquid releases from WBN, located at Tennessee River Mile 528.5, are made through diffusers which extend into the Tennessee River. It is assumed that releases to the river through these diffusers will initially be entrained in one-tenth of the water which flows past the plant. The QWATA code makes the assumption that this mixing condition holds true until the water is completely mixed at Tennessee River Mile 510.0.

Doses are calculated for locations within a 50 mile radius downstream of the plant site. The maximum potential recreation dose is calculated for a location immediately downstream from the plant outfall. The maximum individual dose from ingestion of fish is assumed to be that calculated for the consumption of fish caught anywhere between the plant and the first downstream dam (Chickamauga Dam). The maximum individual dose from drinking water is assumed to be that calculated at the nearest downstream public water supply (Dayton, TN).

This could be interpreted as indicating that the maximum individual, as assumed for liquid releases from WBN, is an individual who obtains all of his drinking water at Dayton, TN, consumes fish caught from the Tennessee River between WBN and Chickamauga Dam, and spends 500 hours0.00579 days 0.139 hours 8.267196e-4 weeks 1.9025e-4 months per year on the shoreline just below the outfall from WBN. Dose estimates for the maximum individual due to liquid effluents for each quarter in the period are presented in Tables 7A and 7B, along with the average river flows past the plant site for the periods.

Population Doses Population doses for highest exposed organ due to airborne effluents are calculated for an estimated 1,066,600 persons living within a 50-mile radius of the plant site. Doses from external pathways and inhalation are based on the 50-mile human population distribution. Ingestion population doses are calculated assuming that each individual consumes milk, vegetables, and meat produced within the sector annulus in which he resides. Doses from external pathways and inhalation are based on the 50-mile human population distribution.

Population doses for total body and the maximum exposed organ due to liquid effluents are calculated for the entire downstream Tennessee River Population. Water ingestion population doses are calculated using actual population figures for downstream public water supplies.

Fish ingestion population doses are calculated assuming that all sport fish caught in the Tennessee River are consumed by the Tennessee River population. Recreation population doses are calculated using actual recreational data on the number of shoreline visits at downstream locations.

Population dose estimates for airborne and liquid effluents are presented in Tables 6A, 6B, 7A and 7B.

E1-28

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 Radiological Impact Direct Radiation External gamma radiation levels were measured by Landauer InLight environmental dosimeters deployed around WBN as part of the offsite Environmental Radiological Monitoring Program.

The quarterly gamma radiation levels determined from these dosimeters during this reporting period averaged 12.25 mR/quarter at onsite (at or near the site boundary) stations and 10.50 mR/quarter at offsite stations or 1.75 mR/quarter higher onsite than at offsite stations. This difference is consistent with levels measured for preoperation and construction phases of the WBN plant site where the average radiation levels onsite were generally 2-8 mR/quarter higher than the levels offsite. This may be attributable to natural variations in environmental radiation levels, earth moving activities onsite, the mass of concrete employed in the construction of the plants, or other undetermined influences. Fluctuations in natural background dose rates and in dosimeters readings tend to mask any small increments which may be due to plant operations.

Thus, there was no identifiable increase in dose rate levels attributable to direct radiation from plant equipment and/or gaseous effluents.

Dose To A Member Of The Public Inside The Unrestricted Area Boundary As stated in the WBN ODCM, an evaluation of the dose to a member of the public inside the unrestricted area boundary is performed for a hypothetical TVA employee who works just outside the restricted area boundary for an entire work year (2000 hours0.0231 days 0.556 hours 0.00331 weeks 7.61e-4 months ). Results from onsite quarterly dosimeter measurements indicated that the highest annual dosimeter reading outside Radiological Control Areas was 90 mrem. Using this value, subtracting an annual background value of approximately 49 mrem/year (see previous section), and multiplying by the ratio of the occupancy times (2000/8760), the highest external dose to a member of the public inside the unrestricted area boundary would be 9.36 mrem. The doses due to radioactive effluents released to the atmosphere calculated in this report would not add a significant amount to this measured dose. This dose is below the 10 CFR 20 annual limit of 100 mrem.

Total Dose To determine compliance with 40 CFR 190, annual total dose contributions to the maximum individual from WBN radioactive effluents and all other nearby uranium fuel cycle sources are considered.

The annual dose to any organ other than thyroid for the maximum individual is conservatively estimated by summing the following doses: the total body air submersion dose for each quarter, the critical organ dose (for any organ other than the thyroid) from airborne effluents for each quarter from ground contamination, inhalation and ingestion, the total body dose from liquid effluents for each quarter, the maximum organ dose (for any organ other than the thyroid) from liquid effluents for each quarter, and any identifiable increase in direct radiation dose levels as measured by the environmental monitoring program. This dose is compared to the 40 CFR 190 limit for total body or any organ dose (other than thyroid) to determine compliance.

The annual thyroid dose to the maximum individual is conservatively estimated by summing the following doses: the total body air submersion dose for each quarter, the thyroid dose from airborne effluents for each quarter, the total body dose from liquid effluents for each quarter, the thyroid dose from liquid effluents for each quarter, and any identifiable increase in direct E1-29

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 radiation dose levels as measured by the environmental monitoring program. This dose is compared to the 40 CFR 190 limit for thyroid dose to determine compliance. Cumulative annual total doses are presented in Table 8.

E1-30

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 6-A Doses from Airborne Effluents First Quarter Individual Doses Pathway Dose Quarterly Percent of Location Limit Limit External Gamma Air 1.76E-04 mrad 5 mrad <1% E/1280 meters Beta Air 2.58E-04 mrad 10 mrad < 1% E/1280 meters Submersion Total Body 7.05E-05 mrem N/A N/A SE/1372 meters Skin 1.54E-04 mrem N/A N/A SE/1372 meters Organ Doses 1 (Max) Child/Bone 4.45E-01 mrem 7.5 mrem 5.93% SE/1372 meters Child/Thyroid 9.09E-02 mrem 7.5 mrem < 1% SE/1372 meters Child/Total Body 9.09E-02 mrem 7.5 mrem < 1% SE/1372 meters Population Doses Total Body Dose 1.44E-02 man-rem Maximum Organ Dose (organ) 6.88E-01 man-rem (bone)

Second Quarter Individual Doses Pathway Dose Quarterly Percent of Location Limit Limit External Gamma Air 4.74E-04 mrad 5 mrad < 1% E/i 280 meters Beta Air 2.45E-04 mrad 10 mrad < 1% E/i 280 meters Submersion Total Body 1.1 3E-04 mrem N/A N/A NE/3353 meters Skin 1.72E-04 mrem N/A N/A NE/3353 meters Organ Doses 1 (Max) Child/Bone 5.82E-01 mrem 7.5 mrem 7.76% SE/1372 meters Child/Thyroid 1.24E-01 mrem 7.5 mrem 1.65% SE/1372 meters Child/Total Body 1.24E-01 mrem 7.5 mrem 1.65% SE/1372 meters Population Doses Total Body Dose 2.13E-01 man-rem Maximum Organ Dose (organ) 9.32E-01 man-rem (bone)

Population doses can be compared to the naturalbackground dose for the entire 50-mile population of about 150,000 man-rem/year (basedon 140 mrem/yr for naturalbackground).

1Organ Doses include contributions from Carbon 14 as carbon dioxide El-31

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 6-B Doses from Airborne Effluents Third Quarter Individual Doses Pathway Dose Quarterly Percent of Location Limit Limit External Gamma Air 2.30E-03 mrad 5 mrad < 1% E/1280 meters Beta Air 2.13E-03 mrad 10 mrad < 1% E/1280 meters Submersion Total Body 1.22E-03 mrem N/A N/A SE/1372 meters Skin 2.22E-03 mrem N/A N/A SE/1372 meters Organ Doses 1 (Max) Child/Bone 1.11E+00 mrem 7.5 mrem 14.80% SE/1 372 meters Child/Thyroid 2.36E-01 mrem 7.5 mrem 3.15% SE/1372 meters Child/Total Body 2.36E-01 mrem 7.5 mrem 3.15% SE/1372 meters Population Doses Total Body Dose 1.97E-01 man-rem Maximum Organ Dose (organ) 8.81E-01 man-rem (bone)

Fourth Quarter Individual Doses Pathway Dose Quarterly Percent of Location Limit Limit External Gamma Air 1.81 E-02 mrad 5 mrad < 1% ESE/1250 meters Beta Air 7.47E-03 mrad 10 mrad < 1% ESE/1250 meters Submersion Total Body 1.17E-02 mrem N/A N/A SE/1372 meters Skin 1.74E-02 mrem N/A N/A SE/1 372 meters Organ Doses 1 Child/Bone 1.61 E+00 mrem 7.5 mrem 21.5% SE/1372 meters Child/Thyroid 3.47E-01 mrem 7.5 mrem 4.630% SE/1 372 meters Child/Total Body 3.47E-01 mrem 7.5 mrem 4.630% SE/1 372 meters Population Doses Total Body Dose 1.83E-01 man-rem Maximum Organ Dose (organ) 8.33E-01 man-rem (bone)

Population doses can be compared to the naturalbackgrounddose for the entire 50-mile population of about 150, 000 man-rem/year (basedon 140 mrem/yr for naturalbackground).

'Organ Doses include contributions from Carbon 14 as carbon dioxide El-32

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 7-A Doses from Liquid Effluents First Quarter Individual Doses (mrem)

Age Group Organ Dose Quarterly Limit Percent of Limit Child Total Body 5.1OE-05 1.5 mrem < 1%

Child Bone 6.80E-05 5 mrem < 1%

Child Thyroid 4.80E-05 5 mrem < 1%

Average Riverflow past WBN (cubic feet per second): 45,807 Population Doses Total Body Dose 2.6E-03 man-rem Maximum Organ Dose (organ) 2.7E-03 man-rem (bone)

Second Quarter Individual Doses (mrem)

Age Group Organ Dose Quarterly Limit Percent of Limit Child Total Body 1.20E-03 1.5 mrem < 1%

Child Bone 1.20E-03 5 mrem < 1%

Child Thyroid 1.1OE-03 5 mrem < 1%

Average Riverflow past WBN (cubic feet per second): 12,262 Population Doses Total Body Dose 6.7E-02 man-rem Maximum Organ Dose (organ) 6.7E-02 man-rem (bone)

Population doses can be compared to the naturalbackground dose for the entire 50-mile population of about 150,000 man-rem/year (basedon 140 mrem/yr for naturalbackground).

E1-33

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 7-B Doses from Liquid Effluents Third Quarter Individual Doses (mrem)

Age Group Organ Dose Quarterly Limit Percent of Limit Adult Total Body 4.40E-03 1.5 mrem < 1%

Child Bone 5.50E-03 5 mrem < 1%

Child Thyroid 3.50E-03 5 mrem < 1%

Average Riverflow past WBN (cubic feet per second): 16,932 Population Doses Total Body Dose 2.2E-01 man-rem Maximum Organ Dose (organ) 2.2E-01 man-rem (bone)

Fourth Quarter Individual Doses (mrem)

Age Group Organ Dose Quarterly Limit Percent of Limit Adult Total Body 9.40E-03 1.5 mrem < 1%

Child Bone 1.20E-02 5 mrem < 1%

Child Thyroid 1.30E-02 5 mrem < 1%

Average Riverflow past WBN (cubic feet per second): 25,613 Population Doses Total Body Dose 3.9E-01 man-rem Maximum Organ Dose (organ) 4.3E-01 man-rem (thyroid)

Population doses can be compared to the naturalbackground dose for the entire 50-mile population of about 150,000 man-rem/year (basedon 140 mrem/yr for naturalbackground).

E1-34

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 TABLE 8 Total Dose from Fuel Cycle First Second Third Fourth Dose Quarter Quarter Quarter Quarter Total Body or any Organ (except thyroid)

Total body air 7.05E-05 1.1 3E-04 1.22E-03 1.17E-02 (submersion)

Critical organ dose 4.45E-01 5.28E-01 1.11 E+00 1.61 E+00 (airborne)

Total body dose 5.1 OE-05 1.20E-03 4.40E-03 9.40E-03 (liquid)

Maximum organ 6.80E-04 1.20E-03 5.50E-03 1.20E-02 dose (liquid)

Direct Radiation O.OOE+00 O.OOE+00 O.0OE+00 O.OOE+00 Dose Total 4.46E-01 5.31E-01 1.12E+00 1.64E+00 Cumulative Total Dose (mrem) 3.74E+00 Annual Dose Limit (mrem) 25 Percent of Limit 14.96%

Thyroid Total body air 7.05E-05 1.13E-04 1.22E-03 1.17E-02 (submersion)

Thyroid dose 9.09E-02 1.24E-01 2.36E-01 3.47E-01 (airborne)

Total body dose 5.1 OE-05 1.20E-03 4.40E-03 9.40E-03 (liquid)

Thyroid dose 4.80E-05 1.1OE-03 3.50E-03 1.30E-02 (liquid)

Total 9.11E-02 1.26E-01 2.45E-01 3.81E-01 Cumulative Total Dose (mrem) 8.44E-01 Annual Dose Limit (mrem) 75 Percent of Limit 1.12%

El-35

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

WATTS BAR NUCLEAR PLANT JAN 1, 2010 - MAR 31, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.S-24.4 TOTAL N 0.000 0.000 0.000 0.000 0.093 0.326 0.000 0.000 0.000 0.420 NNE 0.000 0.000 0.000 0.000 0.140 0.326 0.000 0.000 0.000 0.466 ME 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.047 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.093 SSW 0.000 0.000 0.000 0.000 0.140 0.186 0.000 0.000 0.000 0.326 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 N 0.000 0.000 0.000 0.000 0.047 0.186 0.000 0.000 0.000 0.233 WNW 0.000 0.000 0.000 0.000 0.140 0.140 0.000 0.000 0.000 0.280 NW 0.000 0.000 0.000 0.000 0.047 0.140 0.000 0.000 0.000 0.186 NNW 0.000 0.000 0.000 0.047 0.047 0.140 0.000 0.000 0.000 0.233 SUBTOTAL 0.000 0,.047 0.000 0.047 0.653 1.492 0.000 0.000 0.000 2.238 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2146 TOTAL NOUNS OF STABILITY CLASS A 48 TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 48 TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2145 TOTAL NOUNS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 8.01 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-36

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

WATTS BAR NUCLEAR PLANT JAN 1, 2010 - MAR 31, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24 .5 TOTAL N 0.000 0.000 0.047 0.093 0.140 0.140 0.000 0.000 0.000 0.420 NNE 0.000 0.000 0.000 0.186 0.420 0.280 0.000 0.000 0.000 0.886 NE 0.000 0.000 0.000 0.140 0.140 0.000 0.000 0.000 0.000 0.280 ENE 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.093 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 SSE 0.000 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.093 S 0.000 0-.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 SSW 0.000 0.000 0.000 0.047 0.326 0.000 0.000 0.000 0.000 0.373 SW 0.000 0.000 0.000 0.140 0.186 0.000 0.000 0.000 0.000 0.326 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.047 0.140 0.140 0.000 0.000 0.000 0.326 WNW 0.000 0.000 0.000 0.000 0.047 0.233 0.000 0.000 0.000 0.280 NW 0.000 0.000 0.000 0.047 0.047 0.326 0.000 0.000 0.000 0.420 NNW 0.000 0.000 0.000 0.000 0.140 0.233 0.000 0.000 0.000 0.373 SUBTOTAL 0.000 0.000 0.093 0.886 1.632 1.352 0.000 0.000 0.000 3.963 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2146 TOTAL HOURS OF STABILITY CLASS B 85 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 85 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2145 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 6.67 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-37

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

WATTS BAR NUCLEAR PLANT JAN 1, 2010 - MAR 31, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL N 0.000 0.000 0.047 0.093 0.093 0.326 0.000 0.000 0.000 0.559 NNE 0.000 0.000 0.093 0.140 0.233 0.233 0.000 0.000 0.000 0.699 NE 0.000 0.000 0.047 0.047 0.000 0.047 0.000 0.000 0.000 0.140 ENE 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.093 E 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.093 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.093 0.093 0.000 0.000 0.000 0.000 0.000 0.186 S 0.000 0.000 0.047 0.093 0.047 0.047 0.000 0.000 0.000 0.233 SSW 0.000 0.000 0.047 0.233 0.186 0.047 0.000 0.000 0.000 0.513 SW 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.000 0.093 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.140 0.047 0.000 0.000 0.000 0.186 WNW 0.000 0.000 0.000 0.140 0.186 0.186 0.000 0.000 0.000 0.513 NW 0.000 0I.000 0.000 0.140 0.186 0.373 0.000 0.000 0.000 0.699 NNW 0.000 0.000 0.093 0.047 0.280 0.420 0.000 0.000 0.000 0.839 SUBTOTAL 0.000 0.000 0.606 1.166 1.352 1.725 0.000 0.000 0.000 4.848 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2146 TOTAL HOURS OF STABILITY CLASS C 104 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 104 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2145 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 6.40 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-38

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=--0.5 C/100 M)

WATTS BAR NUCLEAR PLANT JAN 1, 2010 - MAR 31, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL 0.000 0.140 1.259 1.772 2.517 1.632 0.000 0.000 0.000 7.319 NNE 0.000 0.000 0.979 1.538 2.005 1.072 0.000 0.000 0.000 5.594 NE 0.000 0.000 0.839 1.352 0.932 0.233 0.000 0.000 0.000 3.357 ENE 0.000 0.047 0.932 0.559 0.047 0.000 0.000 0.000 0.000 1.585 E 0.000 0.047 0.326 0.280 0.047 0.000 0.000 0.000 0.000 0.699 ESE 0.000 0.140 0.233 0.047 0.000 0.047 0.000 0.000 0.000 0.466 SE 0.000 0.047 0.140 0.093 0.000 0.000 0.000 0.000 0.000 0.280 SSE 0.000 0.000 0.653 0.093 0.000 0.047 0.000 0.000 0.000 0.793 S 0.000 0.047 0.653 1.259 0.280 0.233 0.000 0.000 0.000 2.471 SSW 0.000 0.140 1.212 2.704 0.699 0.186 0.000 0.000 0.000 4.942 SW 0.000 0.140 0.699 1.212 0.280 0.093 0.000 0.000 0.000 2.424 WSW 0.000 0.093 0.653 0.466 0.513 0.186 0.000 0.000 0.000 1.911 W 0.000 0.093 0.606 0.466 0.839 0.559 0.000 0.000 0.000 2.564 WNW 0.000 0.000 0.699 0.932 1.166 0.653 0.047 0.000 0.000 3.497 NW 0.000 0.047 0.653 1.352 1.445 1.259 0.000 0.000 0.000 4.755 NNW 0.000 0.000 0.793 1.725 3.030 3.217 0.000 0.000 0.000 8.765 SUBTOTAL 0.000 0.979 11.329 15.851 13.800 9.417 0.047 0.000 0.000 51.422 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2146 TOTAL HOURS OF STABILITY CLASS D 1104 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 1103 TOTAL HOURS OF VALID WIND'DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2145 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 5.27 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-39

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

WATTS BAR NUCLEAR PLANT JAN 1, 2010 - MAR 31, 2010 WIND WIND SPEED (NPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL N 0.000 0.186 0.653 0.233 0.000 0.000 0.000 0.000 0.000 1.072 NNE 0.000 0.000 0.466 0.420 0.047 0.000 0.000 0.000 0.000 0.932 NE 0.000 0.047 0.326 0.233 0.093 0.000 0.000 0.000 0.000 0.699 ENE 0.000 0.000 0.886 0.140 0.000 0.000 0.000 0.000 0.000 1.026 E 0.000 0.047 0.420 0.047 0.047 0.000 0.000 0.000 0.000 0.559 ESE 0.000 0.093 0.093 0.000 0.047 0.000 0.000 0.000 0.000 0.233 SE 0.000 0.093 0.140 0.000 0.047 0.000 0.000 0.000 0.000 0.280 SSE 0.000 0.280 0.186 0.047 0.047 0.186 0.000 0.000 0.000 0.746 S 0.000 0.047 0.559 0.326 0.047 0.280 0.000 0.000 0.000 1.259 SSW 0.000 0.420 1.492 0.932 0.280 0.186 0.000 0.000 0.000 3.310 SW 0.000 0.513 0.839 0.513 0.000 0.000 0.000 0.000 0.000 1.865 WSW 0.000 0.233 0.559 0.140 0.140 0.000 0.000 0.000 0.000 1.072 W 0.000 0.420 0.886 0.559 0.093 0.000 0.000 0.000 0.000 1.958 WNW 0.000 0.280 0.886 0.280 0.000 0.047 0.000 0.000 0.000 1.492 NW 0.000 0.186 0.839 0.420 0.093 0.000 0.000 0.000 0.000 1.538 NNW 0.000 0.186 0.420 0.326 0.233 0.000 0.000 0.000 0.000 1.166 SUBTOTAL 0.000 3.030 9.650 4.615 1.212 0.699 0.000 0.000 0.000 19.207 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2146 TOTAL HOURS OF STABILITY CLASS E 412 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 412 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2145 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 3.08 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-40

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F (1.5< DELTA T<= 4.0 C/100 M)

WATTS BAR NUCLEAR PLANT JAN 1, 2010 - MAR 31, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL N 0.002 0.140 0.140 0.000 0.000 0.000 0.000 0.000 0.000 0.282 NNE 0.002 0.140 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.235 NE 0.001 0.047 0.140 0.000 0.000 0.000 0.000 0.000 0.000 0.188 ENE 0.002 0.186 0.186 0.000 0.000 0.000 0.000 0.000 0.000 0.375 E 0.001 0.093 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.141 ESE 0.001 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.094 SE 0.001 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.094 SSE 0.001 0.093 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.140 S 0.002 0.093 0.186 0.000 0.000 0.000 0.000 0.000 0.000 0.282 SSW 0.004 0.420 0.233 0.047 0.000 0.000 0.000 0.000 0.000 0.704 SW 0.004 0.280 0.326 0.000 0.000 0.000 0.000 0.000 0.000 0.610 WSW 0.006 0.466 0.420 0.000 0.000 0.000 0.000 0.000 0.000 0.892 W 0.009 0.839 0.513 0.000 0.000 0.000 0.000 0.000 0.000 1.361 WNW 0.006 0.466 0.466 0.000 0.000 0.000 0.000 0.000 0.000 0.938 NW 0.005 0.466 0.233 0.000 0.000 0.000 0.000 0.000 0.000 0.704 NNW 0.002 0.140 0.140 0.000 0.000 0.000 0.000 0.000 0.000 0.282 SUBTOTAL 0.047 4.009 3.170 0.093 0.000 0.000 0.000 0.000 0.000 7.319 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2146 TOTAL HOURS OF STABILITY CLASS F 157 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 157 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2145 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 1.51 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-41

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

WATTS BAR NUCLEAR PLANT JAN 1, 2010 - MAR 31, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24 .5 TOTAL N 0.011 0.233 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.291 NNE 0.009 0.233 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.242 NE 0.013 0.233 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.339 ENE 0.009 0.233 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.242 E 0.009 0.140 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.242 ESE 0.017 0-.420 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.436 SE 0.009 0.186 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.242 SSE 0.007 0.186 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.194 S 0.026 0.606 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.679 SSW 0.050 0.839 0.420 0.047 0.000 0.000 0.000 0.000 0.000 1.356 SW 0.060 0.932 0.559 0.000 0.000 0.000 0.000 0.000 0.000 1.552 WSW 0.076 1.585 0.326 0.000 0.000 0.000 0.000 0.000 0.000 1.988 W 0.065 1.119 0.513 0.000 0.000 0.000 0.000 0.000 0.000 1.697 WNW 0.034 0.653 0.186 0.000 0.000 0.000 0.000 0.000 0.000 0.873 NW 0.013 0.233 0.093 0.047 0.000 0.000 0.000 0.000 0.000 0.386 NNW 0.009 0.140 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.242 SUBTOTAL 0.420 7.972 2.517 0.093 0.000 0.000 0.000 0.000 0.000 11.002 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2146 TOTAL HOURS OF STABILITY CLASS G 236 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 236 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2145 TOTAL HOURS CALM 9 METEOROLOGICAL FACILITY: .. WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 1.23 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-42

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

WATTS BAR NUCLEAR PLANT APR 1, 2010 - JUN 30, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL

. N 0.000 0.000 0.094 0.094 0.234 0.047 0.000 0.000 0.000 0.468 NNE 0.000 0.000 0.000 0.094 0.140 0.094 0.000 0.000 0.000 0.328 NE 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 ENE 0.000 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.094 E 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 S 0.000 0.000 0.047 0.140 0.094 0.047 0.000 0.000 0.000 0.328 SSW 0.000 0.000 0.000 0.234 0.328 0.515 0.000 0.000 0.000 1.077 SW 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 WSW 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.187 0.000 0.000 0.000

0. 187 NW 0.000 0.000 0.000 0.000 0.187 0.468 0.000 0.000 0.000 0.655 NNW 0.000 0.000 0.047 0.000 0.047 0.094 0.000 0.000 0.000 0.187 SUBTOTAL 0.000 0.000 0.281 0.702 1.124 1.451 0.000 0.000 0.000 3.558 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2136 TOTAL HOURS OF STABILITY CLASS A 76 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 76 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2136 TOTAL HOURS CALW 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 NETERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 6.91 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-43

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

WATTS BAR NUCLEAR PLANT APR 1, 2010 - JUN 30, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=45 TOTAL N 0.000 0.000 0.000 0.421 0.140 0.000 0.000 0.000 0.000 0.562 NNE 0.000 0.000 0.047 0.094 0.328 0.187 0.000 0.000 0.000 0.655 NE 0.000 0.000 0.000 0.000 0.094 0.000 0.000 0.000 0.000 0.094 ENE 0.000 0.000 0.000 0.140 0.000 0.000 0.000 0.000 0.000 0.140 E 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.047 0.047 0,234 0.094 0.000 0.000 0.000 0.421 SSW 0.000 0.000 0.047 0.609 0.515 0.515 0.047 0.000 0.000 1.732 SW 0.000 0.000 0.000 0.234 0.140 0.000 0.000 0.000 0.000 0.375 WSW 0.000 0.000 0.000 0.047 0.047 0.047 0.000 0.000 0.000 0.140 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.047 0.094 0.000 0.000 0.000 0.000 0.140 NW 0.000 0.000 0.000 0.094 0.094 0.140 0.000 0.000 0.000 0.328 NNW 0.000 0.000 0.094 0.094 0.094 0.000 0.000 0.000 0.000 0.281 SUBTOTAL 0.000 0.000 0.281 1.826 1.826 0.983 0.047 0.000 0.000 4.963 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2136 TOTAL HOURS OF STABILITY CLASS B 106 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 106 TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2136 TOTAL HOURS CALN 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 NETER LEVEL NEAN WIND SPEED = 6.12 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El -44

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

WATTS BAR NUCLEAR PLANT APR 1, 2010 - JUN 30, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.S-12.4 12.5-1B.4 18.5-24.4

>=45 TOTAL N 0.000 0.000 0.047 0.047 0.187 0.000 0.000 0.000 0.000

0. 281 NNE 0.000 0.000 0.094 0.234 0.187 0.047 0.000 0.000 0.000 0.562 NE 0.000 0.000 0.047 0.234 0.000 0.000 0.000 0.000 0.000 0.281 ENE 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.094 E 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 SSE 0 .. 000 D~.000 0.000 0.094 0.000 0.000 0.000 0.000 0.000 0.094 S 0.000 0.000 0.140 0.796 0.281 0.094 0.000 0.000 0.000 1.311 SSW 0.000 0.000 0.234 1.170 0.421 0.234 0.000 0.000 0.000 2.060 SW 0.000 0.000 0.140 0 .4 68 0.047 0.000 0.000 0.000 0.000 0.655 WSW 0.000 0.000 0.000 0.281 0.047 0.000 0.000 0.000 0.000 0.328 W 0.000 0.000 0.000 0.140 0.047 0.000 0.000 0.000 0.000 0.187 WNW 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 NW 0.000 0.000 0.047 0.140 0.000 0.047 0.000 0.000 0.000 0.234 NNW 0.000 0.000 0.094 0.047 0.094 0.047 0.000 0.000 0.000 0.281 SUBTOTAL 0.000 0.000 0.936 3.745 1.358 0.468 0.000 0.000 0.000 6.507 TOTAL NOURS OF VALID STABILITY OBSERVATIONS 2136 TOTAL HOURS OF STABILITY CLASS C 139 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 139 TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2136 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 NETER LEVEL MEAN WIND SPEED = 4.90 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-45

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

WATTS BAR NUCLEAR PLANT APR 1, 2010 - JUN 30, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL N 0.000 0.000 0.281 0.375 0.187 0.047 0.000 0.000 0.000 0.890 NNE 0.000 0.000 0.515 0.281 0.234 0.140 0.000 0.000 0.000 1.170 NE 0.000 0.000 0.609 0.702 0.187 0.000 0.000 0.000 0.000 1.498 ENE 0.000 0.000 0.468 0.655 0.234 0.000 0.000 0.000 0.000 1.358 E 0.000 0.094 0.749 0.421 0.047 0.000 0.000 0.000 0.000 1.311 ESE 0.000 0.187 0.421 0.094 0.000 0.000 0.000 0.000 0.000 0.702 SE 0.000 0.047 0.515 0.047 0.000 0.047 0.000 0.000 0.000 0.655 SSE 0.000 0.187 1.358 0.187 0.094 0.094 0.000 0.000 0.000 1.919 S 0.000 0.094 1.732 1.592 0.468 0.375 0.047 0.000 0.000 4.307 SSW 0.000 0.047 2.481 2.622 1.311 0.796 0.000 0.000 0.000 7.257 SW 0.000 0.094 1.124 0.796 0.094 0.000 0.000 0.000 0.000 2.107 WSW 0.000 0.047 0.515 0.562 0.140 0.047 0.000 0.000 0.000 1.311 W 0.000 0.047 0.140 0.281 0.234 0.094 0.000 0.000 0.000 0.796 WNW 0.000 0.094 0.187 0.515 0.281 0.187 0.000 0.000 0.000 1.264 NW 0.000 0.047 0.281 0.328 0.281 0.140 0.000 0.000 0.000 1.077 NNW 0.000 0.000 0.281 0.140 0.187 0.140 0.000 0.000 0.000 0.749 SUBTOTAL 0.000 0.983 11.657 9.597 3.979 2.107 0.047 0.000 0.000 28.371 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2136 TOTAL HOURS OF STABILITY CLASS D 606 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 606 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2136 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 4.15 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-46

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

WATTS BAR NUCLEAR PLANT APR 1, 2010 - JUN 30, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24 .5 TOTAL N 0.000 0.000 0.421 0.515 0.562 0.047 0.000 0.000 0.000 1.545 NNE 0.000 0.047 0.421 0.140 0.047 0.000 0.000 0.000 0.000 0.655 NE 0.000 0.000 0.421 0.234 0.000 0.000 0.000 0.000 0.000 0.655 ENE 0.000 0.047 0.936 0.140 0.000 0.000 0.000 0.000 0.000 1.124 E 0.000 0.140 0.375 0.000 0.000 0.000 0.000 0.000 0.000 0.515 ESE 0.000 0.187 0.140 0.047 0.000 0.000 0.000 0.000 0.000 0.375 SE 0.000 0.234 0.187 0.000 0.000 0.000 0.000 0.000 0.000 0.421 SSE 0.000 0.468 0.375 0.000 0.000 0.000 0.000 0.000 0.000 0.843 S 0.000 0.749 1.264 0.328 0.234 0.375 0.000 0.000 0.000 2.949 SSW 0.000 0.936 2.434 2.200 0.796 0.281 0.000 0.000 0.000 6.648 SW 0.000 1.264 1.919 0.375 0.187 0.000 0.000 0.000 0.000 3.745 WSW 0.000 0.983 0.796 0.187 0.000 0.000 0.000 0.000 0.000 1.966 W 0.000 0.515 0.655 0.281 0.234 0.000 0.000 0.000 0.000 1.685 WNW 0.000 0.375 0.655 0.140 0.140 0.000 0.000 0.000 0.000 1.311 NW 0.000 0.234 0.421 0.047 0.187 0.094 0.000 0.000 0.000 0.983 NNW 0.000 0.000 0.421 0.234 0.375 0.094 0.000 0.000 0.000 1.124 SUBTOTAL 0.000 6.180 11.845 4.869 2.762 0.890 0.000 0.000 0.000 26.545 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2136 TOTAL HOURS OF STABILITY CLASS E 567 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 567 TOTAL HOURS OF VALID WIND. DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2136 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 3.01 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-47

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F (1.5< DELTA T<= 4.0 C/100 M)

WATTS BAR NUCLEAR PLANT APR 1, 2010 - JUN 30, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL N 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.094 NNE 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 NE 0.000 0.000 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.094 ENE 0.001 0.094 0.094 0.047 0.000 0.000 0.000 0.000 0.000 0.235 E 0.000 0.047 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.141 ESE 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 SE 0.000 0.094 0.047 0.094 0.000 0.000 0.000 0.000 0.000 0.235 SSE 0.000 0.094 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.141 S 0.003 0.328 0.421 0.000 0.000 0.000 0.000 0.000 0.000 0.752 SSW 0.005 0.609 0.843 0.375 0.000 0.000 0.000 0.000 0.000 1.831 SW 0.007 1.124 0.936 0.140 0.000 0.000 0.000 0.000 0.000 2.208 WSW 0.009 1.685 0.890 0.000 0.000 0.000 0.000 0.000 0.000 2.584 W 0.009 1.451 1.030 0.094 0.000 0.000 0.000 0.000 0.000 2.584 WNW 0.007 0.983 0.983 0.000 0.000 0.000 0.000 0.000 0.000 1.973 NW 0.002 0.281 0.328 0.047 0.000 0.000 0.000 0.000 0.000 0.658 NNW 0.002 0.187 0.375 0.047 0.000 0.000 0.000 0.000 0.000 0.611 SUBTOTAL 0.047 7.069 6.227 0.890 0.000 0.000 0.000 0.000 0.000 14.232 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2136 TOTAL HOURS OF STABILITY CLASS F 304 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 304 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2136 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 1.70 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-48

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

WATTS BAR NUCLEAR PLANT APR 1, 2010 - JUN 30, 2010 WIND WIND SPEEDO(

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL N 0.002 0.140 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.190 NNE 0.001 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.095 NE 0.001 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.095 ENE 0.001 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.095 E 0.001 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 ESE 0.001 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.095 SE 0.002 0.140 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.142 SSE 0.001 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.095 S 0.008 0.655 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.711 SSW 0.012 0.843 0.140 0.000 0.000 0.000 0.000 0.000 0.000 0.995 SW 0.023 1.311 0.609 0.000 0.000 0.000 0.000 0.000 0.000 1.943 WSW 0.039 2.388 0.890 0.000 0.000 0.000 0.000 0.000 0.000 3.317 W 0.049 2.762 1.311 0.000 0.000 0.000 0.000 0.000 0.000 4.122 WNW 0.030 1.919 0.609 0.047 0.000 0.000 0.000 0.000 0.000 2.605 NW 0.012 0.843 0.140 0.000 0.000 0.000 0.000 0.000 0.000 0.995 NNW 0.003 0.187 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.284 SUBTOTAL 0.187 11.610 3.933 0.094 0.000 0.000 0.000 0.000 0.000 15.824 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2136 TOTAL HOURS OF STABILITY CLASS G 338 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 338 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2136 TOTAL HOURS CALM 4 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 1.25 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-49

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

WATTS BAR NUCLEAR PLANT JUL 1, 2010 - SEP 30, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL N 0.000 0.000 0.091 0.499 0.680 0.771 0.000 0.000 0.000 2.041 NNE 0.000 0.000 0.045 0.363 0.635 0.590 0.000 0.000 0.000 1.633 NE 0.000 0.000 0.136 0.272 0.272 0.000 0.000 0.000 0.000 0.680 ENE 0.000 0.000 0.000 0.091 0.091 0.000 0.000 0.000 0.000 0.181 E 0.000 0-.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.045 ESE 0.000 0.000 0.000 0.045 0.045 0.045 0.000 0.000 0.000 0.136 SE 0.000 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.091 SSE 0.000 0.000 0.000 0.000 0.136 0.000 0.000 0.000 0.000 0.136 S 0.000 0.000 0.091 0.181 0.181 0.045 0.000 0.000 0.000 0.499 SSW 0.000 0.000 0.091 1.179 0.771 0.091 0.000 0.000 0.000 2.132 SW 0.000 0.000 0.136 0.680 0.181 0.000 0.000 0.000 0.000 0.998 WSW 0.000 0.000 0.000 0.272 0.000 0.000 0.000 0.000 0.000 0.272 W 0.000 0.000 0.045 0.045 0.045 0.091 0.000 0.000 0.000 0.227 WNW 0.000 0.000 0.000 0.000 0.045 0.091 0.000 0.000 0.000 0.136 NW 0.000 0.000 0.045 0.045 0.181 0.000 0.000 0.000 0.000 0.272 NNW 0.000 0.000 0.091 0.227 0.680 0.952 0.000 0.000 0.000 1.950 SUBTOTAL 0.000 0.000 0.771 3.946 4.036 2.676 0.000 0.000 0.000 11.429 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2205 TOTAL HOURS OF STABILITY CLASS A 252 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 252 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2205 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 6.01 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-50

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=--1.7 C/100 M)

WATTS BAR NUCLEAR PLANT JUL 1, 2010 - SEP 30, 2010 WIND WIND SPEED (

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL 0.000 0.000 0.045 0.363 0.045 0.045 0.000 0.000 0.000 0.499 NNE 0.000 0.000 0.091 0.272 0.136 0.227 0.000 0.000 0.000 0.726 NE 0.000 0.000 0.045 0.091 0.091 0.000 0.000 0.000 0.000 0.227 ENE 0.000 0.000 0.045 0.091 0.000 0.000 0.000 0.000 0.000 0.136 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.045 SE 0.000 0.000 0.045 0.000 0.045 0.000 0.000 0.000 0.000 0.091 SSE 0.000 0.000 0.045 0.091 0.091 0.000 0.000 0.000 0.000 0.227 S 0.000 0.000 0.045 0.317 0.045 0.000 0.000 0.000 0.000 0.408 SSW 0.000 0.000 0.136 1.043 0.317 0.000 0.000 0.000 0.000 1.497 SW 0.000 0.000 0.000 0.680 0.000 0.000 0.000 0.000 0.000 0.680 WSW 0.000 0.000 0.136 0.317 0.000 0.000 0.000 0.000 0.000 0.454 W 0.000 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.091 WNW 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 NW 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.091 NNW 0.000 0.000 0.000 0.000 0.136 0.000 0.000 0.000 0.000 0.136 SUBTOTAL 0.000 0.000 0.726 3.447 0.907 0.272 0.000 0.000 0.000 5.351 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2205 TOTAL HOURS OF STABILITY CLASS B 118 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 118 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2205 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 4.74 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-51

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

WATTS BAR NUCLEAR PLANT JUL 1, 2010 - SEP 30, 2010 WIND WIND SPEED (MPH)

DIRECTION' CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24 .5 TOTAL N 0.000 0.000 0.091 0.317 0.136 0.091 0.000 0.000 0.000 0.635 NNE 0.000 0.000 0.181 0.181 0.317 0.272 0.000 0.000 0.000 0.952 NE 0.000 a. 000 0.045 0.454 0.000 0.000 0.000 0.000 0.000 0.499 ENE 0.000 0.000 0.045 0.227 0.000 0.000 0.000 0.000 0.000 0.272 E 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.091 ESE 0.000 0.000 0.045 0.091 0.000 0.000 0.000 0.000 0.000 0.136 SE 0.000 0.000 0.045 0.091 0.045 0.000 0.000 0.000 0.000 0.181 SSE 0.000 0.000 0.091 0.136 0.045 0.000 0.000 0.000 0.000 0.272 S 0.000 0.000 0.181 0.227 0.045 0.000 0.000 0.000 0.000 0.454 SSW 0.000 0.000 0.317 0.635 0.136 0.000 0.000 0.000 0.000 1.088 SW 0.000 0.000 0.272 0.272 0.000 0.000 0.000 0.000 0.000 0.544 WSW 0.000 0.000 0.181 0.045 0.045 0.000 0.000 0.000 0.000 0.272 W 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.045 WNW 0.000 0.000 0.181 0.045 0.045 0.000 0.000 0.000 0.000 0.272 NW 0.000 0.000 0.045 0.045 0.045 0.000 0.000 0.000 0.000 0.136 NNW 0.000 "0.000 0.091 0.091 0.000 0.045 0.000 0.000 0.000 0.227 SUBTOTAL 0.000 0.000 1.905 2.902 0.862 0.408 0.000 0.000 0.000 6.077 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2205 TOTAL HOURS OF STABILITY -CLASS C 134 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 134 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2205 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 4.33 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-52

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

WATTS BAR NUCLEAR PLANT JUL 1, 2010 - SEP 30, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL N 0.000 0.000 0.363 0.544 0.363 0.091 0.000 0.000 0.000 1.361 NNE 0.000 0.045 0.499 0.907 0.952 0.363 0.000 0.000 0.000 2.766 NE 0.000 0.000 0.499 1.224 0.181 0.045 0.000 0.000 0.000 1.950 ENE 0.000 0.045 0.816 0.454 0.136 0.000 0.000 0.000 0.000 1.451 E 0.000 0.000 0.680 0.317 0.045 0.000 0.000 0.000 0.000 1.043 ESE 0.000 0.000 0.680 0.181 0.000 0.000 0.000 0.000 0.000 0.862 SE 0.000 0.045 0.363 0.181 0.000 0.000 0.000 0.000 0.000 0.590 SSE 0.000 0.136 1.179 0.454 0.045 0.000 0.000 0.000 0.000 1.814 S 0.000 0.136 1.134 0.726 0.045 0.000 0.000 0.000 0.000 2.041 SSW 0.000 0.181 1.678 1.814 0.408 0.000 0.000 0.000 0.000 4.082 SW 0.000 0.181 0.816 0.590 0.000 0.000 0.000 0.000 0.000 1.587 WSW 0.000 0.091 0.454 0.227 0.000 0.000 0.000 0.000 0.000 0.771 W 0.000 0.091 0.272 0.045 0.000 0.000 0.000 0.000 0.000 0.408 WNW 0.000 0.045 0.363 0.091 0.000 0.000 0.000 0.000 0.000 0.499 NW 0.000 0.000 0.181 0.181 0.045 0.045 0.000 0.000 0.000 0.454 NNW 0.000 0.000 0.454 0.317 0.136 0.045 0.000 0.000 0.000 0.952 SUBTOTAL 0.000 0.998 10.431 8.254 2.358 0.590 0.000 0.000 0.000 22.630 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2205 TOTAL HOURS OF STABILITY CLASS D 499 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 499 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2205 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 3.66 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-53

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

WATTS BAR NUCLEAR PLANT JUL 1, 2010 - SEP 30, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL 0.000 0.091 0.408 0.454 0.272 0.000 0.000 0.000 0.000 1.224 NNE 0.000 0.000 0.499 0.363 0.091 0.045 0.000 0.000 0.000 0.998 NE 0.000 0.091 0.907 0.363 0.000 0.000 0.000 0.000 0.000 1.361 ENE 0.000 0.000 0.771 0.136 0.000 0.000 0.000 0.000 0.000 0.907 E 0.000 0.136 0.363 0.045 0.000 0.000 0.000 0.000 0.000 0.544 ESE 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.091 SE 0.000 0.181 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.272 SSE 0.000 0.227 0.363 0.045 0.000 0.000 0.000 0.000 0.000 0.635 S 0.000 0.317 0.998 0.272 0.045 0.000 0.000 0.000 0.000 1.633 SSW 0.000 0.590 2.721 0.816 0.045 0.000 0.000 0.000 0.000 4.172 SW 0.000 0.998 1.270 0.091 0.045 0.000 0.000 0.000 0.000 2.404 WSW 0.000 0.635 1.179 0.045 0.000 0.000 0.000 0.000 0.000 1.859 W 0.000 0.907 1.043 0.091 0.045 0.000 0.000 0.000 0.000 2.086 WNW 0.000 0.499 1.043 0.181 0.000 0.000 0.000 0.000 0.000 1.723 NW 0.000 0.181 0.590 0.091 0.000 0.045 0.000 0.000 0.000 0.907 NNW 0.000 0.136 0.590 0.272 0.136 0.000 0.000 0.000 0.000 1.134 SUBTOTAL 0.000 4.989 12.925 3.265 0.680 0.091 0.000 0.000 0.000 21.950 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2205 TOTAL HOURS OF STABILITY CLASS E 484 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 484 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2205 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 2.41 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-54

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F (1.5< DELTA T<= 4.0 C/100 M)

WATTS BAR NUCLEAR PLANT JUL 1, 2010 - SEP 30, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL N 0.001 0.091 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.228 NNE 0.002 0.136 0.181 0.000 0.000 0.000 0.000 0.000 0.000 0.319 NE 0.002 0.181 0.181 0.045 0.000 0.000 0.000 0.000 0.000 0.410 ENE 0.003 0.227 0.317 0.000 0.000 0.000 0.000 0.000 0.000 0.547 E 0.001 0'.181 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.228 ESE 0.001 0.136 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.182 SE 0.001 0.045 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.137 SSE 0.002 0.181 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.319 S 0.003 0.272 0.317 0.045 0.000 0.000 0.000 0.000 0.000 0.638 SSW 0.007 0.454 0.907 0.045 0.000 0.000 0.000 0.000 0.000 1.413 SW 0.011 0.726 1.451 0.000 0.000 0.000 0.000 0.000 0.000 2.188 WSW 0.011 1.179 1.088 0.000 0.000 0.000 0.000 0.000 0.000 2.279 W 0.018 2.177 1.542 0.000 0.045 0.000 0.000 0.000 0.000 3.782 WNW 0.013 2.041 0.635 0.091 0.000 0.000 0.000 0.000 0.000 2.780 NW 0.013 1.814 0.907 0.000 0.000 0.000 0.000 0.000 0.000 2.734 NNW 0.004 0.272 0.454 0.136 0.000 0.000 0.000 0.000 0.000 0.865 SUBTOTAL 0.091 10.113 8.435 0.363 0.045 0.000 0.000 0.000 0.000 19.048 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2205 TOTAL HOURS OF STABILITY CLASS F 420 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 420 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2205 TOTAL HOURS CALM 2 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 1.56 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-55

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.D C/1O0 N)

WATTS BAR NUCLEAR PLANT JUL 1, 2010 - SEP 30, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=45 TOTAL N 0.001 0.227 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.273 NNE 0.001 0.136 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.182 NE 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.091 ENE 0.000 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.137 E 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.091 ESE 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.091 SE 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SSE 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 S 0.000 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.137 SSW 0.001 0.227 0.181 0.000 0.000 0.000 0.000 0.000 0.000 0.410 SW 0.003 0.590 0.272 0.000 0.000 0.000 0.000 0.000 0.000 0.865 WSW 0.006 0.952 0.680 0.045 0.000 0.000 0.000 0.000 0.000 1.684 W 0.011 2 .4 94 0.680 0.000 0.000 0.000 0.000 0.000 0.000 3.185 WNW 0.010 1.859 1.224 0.000 0.000 0.000 0.000 0.000 0.000 3.094 NW 0.008 1.633 0.680 0.045 0.000 0.000 0.000 0.000 0.000 2.366 NNW 0.003 0.499 0.317 0.000 0.000 0.000 0.000 0.000 0.000 0.819 SUBTOTAL 0.045 9.116 4.263 0.091 0.000 0.000 0.000 0.000 0.000 13.515 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2205 TOTAL NOURS OF STABILITY CLASS G 298 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 298 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2205 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 1.36 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-56

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

WATTS BAR NUCLEAR PLANT OCT 1, 2010 - DEC 31, 2010 WIND WIND SPEED DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24 .5 TOTAL N 0.000 0.000 0.045 0.272 U. 2 / 0.590 0.000 U.UUU 0.000 1.134 NNE 0.000 0.000 0.000 0.136 0.318 0.363 0.000 0.000 0.000 0.817 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.136 0.000 0.000 0.000 0.000 0.136 SSW 0.000 0.000 0.000 0.000 0.181 0.091 0.000 0.000 0.000 0.272 SW 0.000 0.000 0.000 0.091 0.136 0.000 0.000 0.000 0.000 0.227 WSW 0.000 0.000 0.000 0.000 0.045 0.091 0.000 0.000 0.000 0.136 W 0.000 0.000 0.000 0.000 0.045 0.045 0.000 0.000 0.000 0.091 WNW 0.000 0.000 0.000 0.000 0.045 0.272 0.000 0.000 0.000 0.318 NW 0.000 0.000 0.000 0.045 0.091 0.544 0.091 0.000 0.000 0.771 NNW 0.000 0.000 0.000 0.091 0.227 0.544 0.000 0.000 0.000 0.862 SUBTOTAL 0.000 0.000 0.045 0.635 1.452 2.541 0.091 0.000 0.000 4.764 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2204 TOTAL HOURS OF STABILITY CLASS A 105 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 105 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2204 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 7.86 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-57

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

WATTS BAR NUCLEAR PLANT OCT 1, 2010 - DEC 31, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL N 0.000 0.000 0.000 0.136 0.181 0.454 0.000 0.000 0.000 0.771 NNE 0.000 0.000 0.000 0.408 0.227 0.408 0.000 0.000 0.000 1.044 NE 0.000 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.091 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.045 SSE 0.000 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.091 S 0.000 0.000 0.000 0.227 0.091 0.136 0.000 0.000 0.000 0.454 SSW 0.000 0.000 0.000 0.272 0.091 0.045 0.000 0.000 0.000 0.408 SW 0.000 0.000 0.000 0.136 0.091 0.000 0.000 0.000 0.000 0.227 WSW 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.045 W 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.045 WNW 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.045 NW 0.000 0.000 0.045 0.045 0.091 0.181 0.045 0.000 0.000 0.408 NNW 0.000 0.000 0.000 0.091 0.091 0.227 0.000 0.000 0.000 0.408 SUBTOTAL 0.000 0.000 0.136 1.497 0.862 1.543 0.045 0.000 0.000 4.083 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2204 TOTAL HOURS OF STABILITY CLASS B 90 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 90 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2204 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 6.70 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-58

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 N)

WATTS BAR NUCLEAR PLANT OCT 1, 2010 - DEC 31, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>~45 TOTAL N 0.000 0.000 0.091 0.272 0.045 0.363 0.000 0.000 0.000 0.771 NNE 0.000 0.000 0.136 0.272 0.091 0.136 0.045 0.000 0.000 0.681 NE 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.091 ENE 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.04 5 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 SE 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.091 SSE 0.000 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.091 S 0.000 0.000 0.091 0.454 0.091 0.091 0.000 0.000 0.000 0.726 S SW 0.000 0.000 0.181 0.544 0.136 0.091 0.000 0.000 0.000 0.953 SW 0.000 0.000 0.045 0.181 0.000 0.000 0.000 0.000 0.000 0.227 WSW 0.000 0.000 0.045 0.000 0.045 0.000 0.000 0.000 0.000 0.091 W 0.000 0'.

000 0.000 0.04S 0.000 0.000 0.000 0.000 0.000 0.045 WNW 0.000 0.000 0.000 0.045 0.000 0.045 0.000 0.000 0.000 0.091 MW 0.000 0.000 0.000 0.045 0.045 0.136 0.045 0.000 0.000 0.272 NNW 0.000 0.000 0.091 0.045 0.000 0.181 0.000 0.000 0.000 0.318 SUBTOTAL 0.000 0.000 0.862 2.087 0.454 1.044 0.091 0.000 0.000 4 .537 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2204 TOTAL HOURS OF STABILITY CLASS C 100 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 100 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2204 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 5.56 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-59

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

WATTS BAR NUCLEAR PLANT OCT 1, 2010 - DEC 31, 2010 WIND WIND SPEED DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL N 0.000 0.136 0.817 0.408 0.817 2.223 0.000 0.000 0.000 4.401 NNE 0.000 0.091 1.180 0.907 0.681 0.907 0.000 0.000 0.000 3.766 NE 0.000 0.045 1.044 0.771 0.318 0.045 0.000 0.000 0.000 2.223 ENE 0.000 0.136 1.407 0.363 0.000 0.000 0.000 0.000 0.000 1.906 E 0.000 0.045 0.544 0.045 0.000 0.000 0.000 0.000 0.000 0.635 ESE 0.000 0.045 0.318 0.136 0.045 0.000 0.000 0.000 0.000 0.544 SE 0.000 0.091 0.544 0.045 0.045 0.000 0.000 0.000 0.000 0.726 SSE 0.000 0.045 0.726 0.227 0.000 0.000 0.000 0.000 0.000 0.998 S 0.000 0.000 0.681 0.953 0.454 0.544 0.045 0.000 0.000 2.677 SSW 0.000 0.091 1.407 0.544 0.363 0.454 0.136 0.000 0.000 2.995 SW 0.000 0.136 0.953 0.136 0.045 0.136 0.000 0.000 0.000 1.407 WSW 0.000 0.091 0.817 0.408 0.272 0.000 0.000 0.000 0.000 1.588 W 0.000 0.045 0.227 0.136 0.181 0.635 0.000 0.000 0.000 1.225 WNW 0.000 0.272 0.681 0.408 0.499 0.499 0.000 0.000 0.000 2.359 NW 0.000 0.227 0.499 0.590 0.771 1.044 0.045 0.000 0.000 3.176 NNW 0.000 0.045 0.499 0.318 1.044 2.405 0.091 0.000 0.000 4.401 SUBTOTAL 0.000 1.543 12.341 6.397 5.535 8.893 0.318 0.000 0.000 35.027 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2204 TOTAL HOURS OF STABILITY CLASS D 772 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 772 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2204 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 5.18 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-60

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

WATTS BAR NUCLEAR PLANT OCT 1, 2010 - DEC 31, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

-=24.5 TOTAL N 0.000 0.000 0.499 0.681 0.544 0.136 0.000 0.000 0.000 1.860 NNE 0.000 0.091 0.499 0.091 0.091 0.000 0.000 0.000 0.000 0.771 NE 0.000 0.045 0.590 0.045 0.000 0.000 0.000 0.000 0.000 0.681 ENE 0.000 0.227 0.862 0.091 0.000 0.000 0.000 0.000 0.000 1.160 E 0.000 0.181 0.272 0.000 0.000 0.000 0.000 0.000 0.000 0.454 ESE 0.000 0.181 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.272 SE 0.000 0.181 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.227 SSE 0.000 0.136 0.091 0.181 0.045 0.000 0.000 0.000 0.000 0.454 S 0.000 0.227 0.817 0.272 0.136 0.136 0.000 0.000 0.000 1.588 SSW 0.000 0.181 0.953 0.363 0.091 0.045 0.000 0.000 0.000 1.633 SW 0.000 0.454 0.681 0.091 0.045 0.091 0.000 0.000 0.000 1.361 WSW 0.000 0.408 0.590 0.045 0.091 0.045 0.000 0.000 0.000 1.180 W 0.000 0.544 0.907 0.045 0.000 0.000 0.000 0.000 0.000 1.497 WNW 0.000 0.681 0.771 0.544 0.136 0.000 0.000 0.000 0.000 2.132 NW 0.000 0.363 1.497 0.771 0.272 0.136 0.000 0.000 0.000 3.040 NNW 0.000 0.000 0.907 0.499 0.590 0.091 0.000 0.000 0.000 2.087 SUBTOTAL 0.000 3.902 10.027 3.766 2.042 0.681 0.000 0.000 0.000 20.417 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2204 TOTAL HOURS OF STABILITY CLASS E 450 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 450 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2204 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 3.01 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-61

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F (1.5< DELTA T<= 4.0 C/100 M)

WATTS BAR NUCLEAR PLANT OCT 1, 2010 - DEC 31, 2010 WIND WIND SPEED 7

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5- .4 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL N 0.000 0.227 0.318 0.091 0.000 0.000 0.000 0.000 0.000 0.635 NNE 0.000 0.045 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.181 NE 0.000 0.136 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.272 ENE 0.000 0.045 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.136 E 0.000 0.181 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.272 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.091 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.136 SSE 0.000 0.045 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.091 S 0.000 0.045 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.136 SSW 0.000 0.227 0.227 0.045 0.000 0.000 0.000 0.000 0.000 0.499 SW 0.000 0.318 0.454 0.000 0.000 0.000 0.000 0.000 0.000 0.771 WSW 0.000 0.771 0.454 0.045 0.000 0.000 0.000 0.000 0.000 1.270 W 0.000 1.543 0.862 0.000 0.000 0.000 0.000 0.000 0.000 2.405 WNW 0.000 1.770 1.452 0.091 0.000 0.000 0.000 0.000 0.000 3.312 NW 0.000 1.452 0.998 0.000 0.000 0.000 0.000 0.000 0.000 2.450 NNW 0.000 0.227 0.272 0.045 0.000 0.000 0.000 0.000 0.000 0.544 SUBTOTAL 0.000 7.123 5.626 0.318 0.045 0.000 0.000 0.000 0.000 13.113 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2204 TOTAL HOURS OF STABILITY CLASS F 289 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 289 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2204 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 1.57 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-62

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

WATTS BAR NUCLEAR PLANT OCT 1, 2010 - DEC 31, 2010 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24 .5 TOTAL N 0.004 0.454 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.594 NNE 0.002 0.091 0.181 0.000 0.000 0.000 0.000 0.000 0.000 0.274 NE 0.003 0.318 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.411 ENE 0.001 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.091 E 0.001 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.137 ESE 0.001 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.091 SE 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SSE 0.001 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.091 S 0.001 0.136 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.183 SSW 0.002 0.045 0.181 0.000 0.000 0.000 0.000 0.000 0.000 0.229 SW 0.002 0.091 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.229 WSW 0.011 0.953 0.499 0.000 0.000 0.000 0.000 0.000 0.000 1.463 W 0.030 2.904 1.089 0.000 0.000 0.000 0.000 0.000 0.000 4.023 WNW 0.031 3.221 0.862 0.000 0.000 0.000 0.000 0.000 0.000 4.114 NW 0.032 3.221 0.998 0.000 0.000 0.000 0.000 0.000 0.000 4.252 NNW 0.014 1.361 0.454 0.000 0.000 0.000 0.000 0.000 0.000 1.829 SUBTOTAL 0.136 13.113 4.809 0.000 0.000 0.000 0.000 0.000 0.000 18.058 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2204 TOTAL HOURS OF STABILITY CLASS G 398 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 398 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2204 TOTAL HOURS CALM 3 METEOROLOGICAL FACILITY: WATTS BAR NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 1.24 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-63

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 ATTACHMENT 1 Deviations from ODCM Controls/Surveillance Requirements None El-64

WATTS BAR NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT - 2010 ATTACHMENT 2 Radioactive Effluent Monitoring Instrumentation Inoperable for Greater than 30 days 1/2.1.1 Liquid Radwaste Radiation Monitor 0-RE-90-122 was inoperable for 10/05/2010 Control 1.1.1 more than 30 days due the replacement of a faulty monitor pump and Action B local handswitch. Radiation Monitor 0-RE-90-122 became inoperable Table 1.1-1 on 10/6/2010 at 0513 and returned to operable status on 11/17/2010 Item 1. a at 1520. During the inoperable period; compensatory requirements specified in the ODCM were met for each radwaste release.

1/2.1.1 Steam Generator Blowdown Radiation Monitors 1-RE-90-120 and 12/14/2010 Control 1.1.1 1-RE-90-121 were inoperable for more than 30 days due the loss of Action B cooling water to the radiation monitors. Radiation Monitors 1-RE Table 1.1-1 120/121 became inoperable on 11/14/2010 at 0845 and returned to Item 1. b service 12/17/2010 at 1531. During the inoperable period; compensatory requirements as specified in the ODCM were met.

1/2.1.2 Auxiliary Building Isokinetic Flow Loop 0-LPF-90-300 was inoperable 12/11/2010 Control 1.1.2 for more than 30 days due to the flow indicator showing flow without Action B any supply fans running. Auxiliary Building Isokinetic Flow Loop Table 1.1-2 0-LPF-90-300 became inoperable on 11/11/2010 at 0915 and Item 4. c remained inoperable on 12/31/2010 at 2400. During the inoperable period; compensatory requirements as specified in the ODCM were met.

El-65

ML11126A180

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