Text

Enclosures 1 and 2 - Sequoyah Nuclear Plant 2008 Annual Radioactive Effluent Release Report (ARERR) and Radiological Impact Assessment Report
	ML091260462
Person / Time
Site:	Sequoyah
Issue date:	04/30/2009
From:	; Tennessee Valley Authority
To:	; Office of Nuclear Reactor Regulation
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Enclosure 1 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT SEQUOYAH NUCLEAR PLANT 2008 El-M

2008 SEQUOYAH NUCLEAR PLANT EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 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 mremiyear to the skin.

b. Iodine-131 (1-131), Iodine-133 (I- 133), tritium, and all radionuclides in particulate form with half-lives greater than eight 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-131, Iodine-133, tritium, and 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 to7.5 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 I1. The annual average concentration of radioactivity released in liquid effluents to unrestricted areas shall be limited to the concentrations specified in Title 10 of the Code of Federal Regulations (CFR), 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 microcuries/milliliter (jiCi/ml) total activity.

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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.

II. EFFLUENT CONCENTRATION LIMITS A. Liquids

1. 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 uCi/ml is applied. This ECL is based on the Xenon-135 (Xe-135) concentration in air (submersion dose) converted to an equivalent concentration in water as discussed in the International Commission on Radiological Protection (ICRP), Publication 2.

These values are used as applicable limits for liquid and gaseous effluents.

B. Gaseous

1. The maximum permissible dose rates for gaseous releases are defined in plant Offsite Dose Calculation Manual'(ODCM).

a. Noble gas dose rate at the unrestricted area b1oundary:

- Less than or equal to 500 mrem/year to the total body.

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

b. Iodine- 131, Iodine- 133, tritium, and particulates with half-lives greater than eight days dose rate at the unrestricted area boundary:

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

These values are used as applicable limits: for liquid and gaseous effluents.

III. AVERAGE ENERGY Sequoyah's ODCM limits the dose equivalent rates due to the release of noble gases to less than or equal to 500 torem/year to the total body and less than or equal to 3000 mrem/year to the skin. The use of dose rate is in accordance with NUREG-0133, "Preparation of Radiological Effluent Technical Specifications for Nuclear Power Plants". Since the release rate is not used for effluent control, the average energy discussed in Regulatory El-3

Guide 1.21 (used for release rate control) is not included in this report.

IV. MEASUREMENTS AND APPROXIMATIONS OF TOTAL RADIOACTIVITY NOTE: Every effort is made to ensure that effluent releases from Sequoyah are conducted such that all ODCM Lower Limit of Detection (LLD) values are met.

Whenever an analysis does not identify a radioisotope, an "O.OOE-01 Ci" is recorded for the release. This does not necessarily mean that no activity was released for that particular radionuclide, but that the concentration was below the ODCM and analysis LLD. Refer to Tables A and B for estimates of these typical LLD values.

A. Fission and Activation Gases Airborne effluent gaseous activity is continuously monitored and recorded. Additional grab samples from the shield building, auxiliary building, service building, and condenser vacuum exhausts are taken and analyzed at least monthly to determine the quantity of noble gas activity released for the month based on the average vent flow rates recorded for the sample period. Also, noble gas samples are collected and evaluated for the shield and auxiliary buildings following startup, shutdown, or rated thermal power change exceeding 15 percent within one hour (sampling is only required if the 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 3).

The quantity of noble gases released through the shield and auxiliary building exhausts due to purging or venting of containment-and releases of waste gas decay tanks are also determined.

.j The total noble gas activity released for the month is then determined by summing of the activity released from each vent for the sampling periods.

B. lodines and Particulates Iodine and particulate activity is continuously sampled. Charcoal and particulate samples are taken from the shield and auxiliary building exhausts and analyzed at least weekly to determine the total activity released from the plant based on the average vent flow rates recorded for sampling period.

Also, particulate and charcoal samples are taken from the auxiliary and shield building exhausts once per 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months for 2 days following startup, shutdown, or a rated thermal power change exceeding 15 percent within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . The quantity of iodine and particulate released from each vent during each sampling period is then determined using the average vent flow rates recorded for the sampling period and activity concentration.

The total particulate and iodine activity released for the month is then determined by summing all activity released from the shield and auxiliary building exhausts for the E1-4

sampling periods.

C. Liquid Effluents Batch (Radwaste and during periods of primary to secondary leakage, condensate regenerants to cooling tower blowdown)

Total gamma isotopic activity concentrations are determined on each batch of liquid effluent prior to release. The total activity of a released batch is determined by summing each nuclide's concentration and multiplying by the total volume discharged.

The total activity released during a month is then determined by summing the activity content of each batch discharged during the month.

Continuous Releases and Periodic Continuous Releases (Condensate regenerants, turbine building sump, and steam generator blowdown)

Total gamma isotopic activity concentration is determined daily on a composite sample from the condensate system and turbine building sump and weekly for steam generator blowdown. The total activity of the continuousrelease is determined by summing each nuclide's concentration and multiplying by the total volume discharged.

The total activity released during the month is then determined by summing the activity content of each daily and weekly composite for the month.

Monitoring Wells SQN started conducting an investigation of tritium releases to the.groundwater in 2003 due to identification of tritium in one of the on-site monitoring wells. This study involed pressure testing of the radwaste discharge line, installation and sampling of groundwater wells, visual inspection under the Refueling Water Storage Tank (RWST's) and inspection of drain lines. In addition to the one on-site Radiological Environmental Monitoring Program (REMP) groundwater monitoring well, Sequoyah Nuclear Plant also has 18 non-REMP monitoring wells to support monitoring the onsite groundwater plume and for the presence or increase of radioactivity. These wells are sampled periodically for tritium. The highest tritium concentration obtained in 2008 from these non-REMP monitoring wells was 13,000 pCi!L.

Doses from 1-131 Water Ingestion Pathway The radiological environmental monitoring program (REMP) requirements as specified in Table 3.12-1 from NUREG 1301, "Offsite Does Calculation Manual Guidance:

Standard Radiological Effluent Controls for Pressurized Water Reactors," dated 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. In order 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 here 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 SQN REMP drinking water samples.

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Quarter 1 2 I 3 1-O.OOE-01 4 Totals 1-131 Ci Infant/Thyroid (mrem)

Population/Thyroid (mrem) 1.79E-05 5.30E-06 1.50E-04 0.OOE-01 0

0

+

-V 0.OOE-01 0

0

+

1~

0 0

1.79E-05 5.30E-06 1.50E-04 V. BATCH RELEASES Value 1st Half 2nd Half Units A. Liquid (Radwaste only)

1. Number of releases 82 51 Each

2. Total time period of releases 12180 13550 Minutes

3. Maximum time period of release 240.00. 1807.00 Minutes

4. Average time period of releases 148.54 '265.69 Minutes

5. Minimum time period for release 69.00 100.00 Minutes

6. Average dilution stream flow during release 16680.5 18023.5 CFS periods B. Gaseous (Batches only - containment purges, and waste gas decay tanks)

1. Number of releases 112 69 Each "

2. Total time period of releases 49659.00 24750.00 Minutes

3. Maximum time period for release 3366.00 2310.00 Minutes

4. Average time period for releases 443.38 358.70 Minutes

5. Minimum time period for release 30.00 10.00 Minutes VI. ABNORMAL RELEASES Value Units 1st Half 2nd Half A. Liquid Number of Releases 0 0 Total Activity Released N/A N/A Ci B. Gaseous Number of Releases 0 1 Total Activity Released '0.OOE-01 0.OOE-01 Ci El-6

Gaseous Abnormal Release Release Point:Auxilliary Building Ventilation Exhaust Start Date/Time of Release: 09/10/2008 17:29 This evaluation .is for the release to the environment that through a hole in the duct work upstream of the radiation monitor 0-RM 101. The hole in the duct work was discovered at 17:29 on 10-Sep-2008. The hole was patched and tested under WO# 779534 and PER 152292 was written. The following is the data used to determine the curies and dose impact as a result of the release.

The release occurred over 461 minutes The Noble Gas sample showed no radioactivity Tritium concentration was 2.58E-08 jiCi/cc Tritium released 2.83E-04 Curies The weekly filter analysis showed no Iodine or particulate activity.

The impact to 10 CFR 20 Dose rates were as follows:

Total body dose rate 0 mrem/year Limit is 500 torem/year Organ dose rate 2:45E-04mrem/year Limit is 1500 norero/year Skin dose rate 0 mrem/year Limit is 3000 mrem/year The impact to 10 CFR 50 doses were as follows:

Gamma air dose 0 mrad Limit is-5 mrad/quarter Beta air dose 0 mrad Limit is 10 mradlquarter Organ dose 1.97 mrad Limit is 7.5 mrad/quarter E1-7

Liquid Effluents-Summation of All Releases During the Period Starting: 1-Jan-2008 Ending: 30-Jun-2008 Type of Effluent Units Quarter 1 Quarter 2 Estimated Total Error A. Fission and & Activation Products

1. Total Release (Not-including Tritium, Ci 3.04E-02 4.02E-02 18%

Gases, and Alpha

2. Average Diluted Concentration VLCi/ml 1.71E-08 2.06E-06 During Period

3. Percent of Applicable Limit B. Tritum

1. Total Release ,Ci 3.41E+02 2.47E+02 18%

2. Average Diluted Concentration ýtCi/ml 1.92E-04 1.27E-04 During Period

3. Percent of Applicable Limit

C. Dissolved and Entrained Gases

1. Total Release* Ci 4.77E-03 4.48E-04 39%

2. Average Diluted Concentration [iCi/ml 2.69E-09 2.30E-10 During Period

3. Percent of Applicable Limit % 1.34E-03 1.15E-04 D. Gross Alpha Radioactivity

1. Total Release Ci O.OOE-O1 O.OOE-01 E. Total Waste Volume Released Liters 5.70E+07 6.89E+07 4%

(Pre-Dilution)

F. Volume of Dilution Water Used Liters 1.72E+09 1.88E+09 4%

G. Radwaste Volume Released Liters 1.38E+06 2.14E+06

Appilicable Limits are expressed in terms of dose. See Tables 1-4 of the 2008 Radiological Impact Assessment Report.

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

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

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Liquid Effluents-Summation of All Releases During the Period .i Starting: 1-Jul-2008 Ending: 31 -Dec-2008 Type of Effluent Units Quarter 3 Quarter 4 Estimated Total Error 0%

A. Fission and & Activation Products

1. Total Release (Not including Tritium, Ci 8.27E-03 2.76E-03 18%

Gases, and Alpha

2. Average Diluted Concentration gCi/ml 4.5 1E-09 1.60E-09 During Period

3. Percent of Applicable Limit B. Tritum

1. Total Release Ci 1.55E+02 5.27E+02 18%

2. Average Diluted Concentration ýt.Ci/ml 8.46E-05 3.05E-04 During Period

3. Percent of Applicable Limit C. Dissolved and Entrained Gases

1. Total Release Ci 3.74E-04 4.85E-03 39%-

2. Average Diluted Concentration ýtCi/ml 2.04E-10 2.81E-09 During Period

3. Percent of Applicable Limit % 1.02E-04 1.40E-03 D. Gross Alpha Radioactivity

1. Total Release Ci O.OOE-01 O.OOE-01 E. Total Waste Volume Released Liters 5.32E+07 5.70E+07 4%

(Pre-Dilution)

F. Volume of Dilution Water Used Liters 1.78E+09 1.67E+09 4%

G. Radwaste Volume Released Liters 1.41E+06 8.10E+05

Appilicable Limits are expressed in terms of dose. See Tables 1-4 of the 2008 Radiological Impact Assessment Report.

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

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

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Curies Released in Liquid Effluents During the period Starting: 1-Jan-2008 Ending 31-Mar-2008 Continuous Batch Total Tritium 1.38E-01 3.41E+02 3.41E+02 FISSION & ACTIVATION PRODUCTS Cobalt-57 O.OOE+01 1.70E-04 i.70E-04 Cobalt-58 O.OOE+01 1.29E-02 1.29E-02 Cobalt-60 O.OOE+01 6.43E-03 6.43E-03 Chromium-51 O.OOE+01 3.49E-04 3.49E-04 Cesium-134 O.OOE+01 2.16E-05 2.16E-05 Cesium-137 O.OOE+01 2.86E-04 2.86E-04 Iron-55 O.OOE+O1 9.40E-03 9.40E-03 Iodine-131 O.OOE+01 1.79E-05 1.79E-05 Lanthanum-140 0.OOE+O1 2.26E-06 2.26E-06 Manganese-54 O.0OE+01 .1.97E-04 1.97E-04 Niobium-95 O.OOE+01 2.14E-04 2.14E-04 Antimony- 124 O.OOE+01 9.89E-05 9.89E-05 Antimony-125 O.OOE+01 2.13E-04 2.13E-04 Zinc-65 -) O.OOE+01 8.27E-06 8.27E-06 Zirconium-95 O.OOE+01 1.25E-04 1.25E-04 TOTALS O.OOE+01 3.04E-02 3.04E-02 DISSOLVED AND ENTRAINED GASES Xenon-133 O.OOE+01 4.69E-03 4.69E-03 Xenon-133m O.OOE+01 1.91E-05 1.91E-05 Xenon- 135 O.OOE+01 6.17E-05 6.17E-05 TOTALS O.OOE+0O1 4.77E-03 4.77E-03

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

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Curies Released in Liquid Effluents During the period Starting: l-Apr-2008 Ending 30-Jun-2008 Continuous Batch Total

..... 2.47E+02 Tritium 1.58E-01 2.47E+02 FISSION & ACTIVATION PRODUCTS Silver- 11Gm 0.OOE+01 4.17E-04 4.17E-04 Cobalt-57 O.OOE+01 6.44E-05 6.44E-05 Cobalt-58 O.OOE+01 1.33E-02 1.33E-02 Cobalt-60 O.OOE+01 3.58E-03 3.58E-03 Chromium-51 0.OOE+01 6.04E-03 6.04E-03 Cesium- 134 0.OOE+01 3 .65E-06 3.65E-06 Cesium-137 0.00E+01 7.46E-05 7.46E-05

Iron-55 0.OOE+01 1.44E-02 1.44E-02 Iron-59 O.OOE+01 5.16E-04 5.16E-04 Lanthanum- 140 0.OOE+01 3.01E-06 3.01E-06 Manganese-54 0.OOE+01 3.55E-04 3.55E-04 Niobium-95 0.OOE+01 2.61E-04 2.6 1E-04 Antimony- 124 0.00E+01 7.2 1E-05 7.2 1E-05 Antimony- 125 0.OOE+01 1.02E-03 1.02E-03 Zirconium-95 0.OOE+01 1.23E*-04 1.23E-04

.TOTALS O0.OOE+01 4.02E-02 4.02E-02 DISSOLVED AND ENTRAINED GASES Xenon-133 0.OOE+01 4.48E-04 4.48E-04 TOTALS 0.OOE+01 4.48E-04 4.48E-04

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

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Curies Released in Liquid Effluents During the period Starting: 1-Jul-2008 Ending 30-Sep-2008 Continuous Batch Total Tritium 1.99Eý0 -O 1.55E+02 1.55E+02 FISSION & ACTIVATION PRODUCTS Silver-11Om O.OOE+01 3.57E-05 3.57E-05 Barium-140 O.OOE+01 5.1OE-06 5.1OE-06 Cobalt-57 0.OOE+O1 1.09E-05 1.09E-05 Cobalt-58 0. OOE+0 1 3.97E-03 3.97E-03 Cobalt-60 0.OOE+01 8.83E-04 8.83E-04 Chromium-51 0.OOE+01 1.92E-04 1.92E-04 Iron-55 O.OOE+01 2.18E-03 2.18E-03 Iron-59 0.00E-01i4.63E-05 4.63E-05 Manganese-54 0.OOE+01 1.23E-04 1.23E-04 Niobium-95 0.OOE+01 3.79E-05 3.79E-05 Antimony7124 0.OOE+01 2.52E-05 2.52E-05 Antimony-'125 0.OOE+01 7.57E-04 7.57E-04 TOTALS 0.OOE+01 8.27E-03 8.27E-03 DISSOLVED AND ENTRAINED GASES Xenon-133 0.OOE+01 3.74E-04 3.74E-04 TOTALS 0O.OOE+01 3.74E-04 3.74E-04

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

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Curies Released in Liquid Effluents During the period Starting: 1-Oct-2008 Ending 31 -Dec-2008 Continuous Batch Total Tritium 1.87E-01 1.54E+02 5.27E+02 FISSION & ACTIVATION PRODUCTS Cobalt-57 O.OOE+01 9.55E-06 9.55E-06 Cobalt-58 O.OOE+01 1.36E-03 1.36E-03 Cobalt-60 O.OOE+01 6.07E-04 6.07E-04 Cesium- 137 O.OOE+01 7.46E-05 7.46E-05 Iron-55 O.OOE+01 1.02E-06 .1.02E-06 Iron-59 O.OOE+01 4.89E-04 4.89E-04 Manganese-54 O.OOE+01 4.29E-06 4.29E-06 Antimony- 125 0.OOE+01 2.89E-04 2.89E-04 Zinc-69m O.OOE+01 1.08E-06 1.08E-06 TOTALS O.OOE+01 2.76E-03 2.76E-03 DISSOLVED AND ENTRAINED GASES Xenon-133 O.OOE+01 4.48E-04 4.48E-04 Xenon- 133m O.OOE+01 2.20E-05 2.20E-05 Xenon-135 0.OOE+O1 2.73E-06 2.73E-06

TOTALS O.OOE+01 4.85E-03 4.85E-03

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

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TABLE A LIQUID "TYPICAL LLD" EVALUATION"1)

At(2)

Nuclide ODCM LLD lhr 8 hr 32 hr Manganese-54 5.OE-07 3.36E-08 3.36E-08 3.37E-08 .

Cobalt-58 5.OE-07 2.53E-08 2.54E-08 2.56E-08 Iron-59 5.OE-07 5.26E-08 5.29E-08 5.37E-08 Cobalt-60 5.OE-07 4.63E-08 4.63E-08 4.64E-08 Zinc-65 5.OE-07 2.95E-08 2.95E-08 2,96E-08 Molybdenum-99 5.OE-07 1.55E-07 1.67E-07 2.15E-07 Cesium-134 5.OE-07 1.91E-08 1.91E-08 i.92E-08 Cesium-137 5.OE-07 3.87E-08 3.87E-08 3.87E-08 Cerium- 141 5.0E-07 2.80E-08 2.81E-08 2.87E-08 Cerium-144 5.OE-06 1.11 E-07 1.12E-07 1.12E-07 Iodine- 131 1.OE-06 2.28E-08 2.34E-08 2.55E-08 Krypton-87 1.0E-05 1.16E-07 5.25E-07 (3)

Krypton-88 1.0E-05 9.95E-08 5.49E-07 (3)

Xenon-133 1.OE-05 4.19E-08 4.36E-08 4.98E-08 Xenon-133m 1.OE-05 1.42E-07 1.55E-07 2.13E-07 Xenon-135 1.0E-05 2.06E-08 3.50E-08 2.17E-07 Xenon- 138. 1.OE-05 8.37E-06 (3) (3)

Nuclide ODCM LLD Typical LLD Tritium 1.OE-O5 1.2E-06 Gross Alpha 1.OE-07 2.BE-08 Strontium-89/90 5.OE-08 3.8E-08/1.4E-08 Iron-55 1.OE-06 1.3E-08 NOTES: (1) LLD values are in VLCi/ml.

(2) At is the time between sample collection and counting time.

(3) T 1/2too short.

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Gaseous Effluents - Summation of All Releases During the Period Starting: 1-Jan-2008 Ending: 30-Jun-2008 Type of Effluent Units Quarter 1 Quarter 2 Estimated Total Error A. Fission and & Activation Products

1. Total Release Ci 4.80E+00 3.09E+00 11%

2. Average Release Rate For Period .tCi/sec 6.11 E-01 3.93E-01

3. Percent of Applicable Limit %*

B. Radioiodines

1. Total Iodine- 131 Ci O.OOE+01 O.OOE+01 N/A***

2. Average Release Rate For Period ptCi/sec O.OOE+01 O.OOE+01

3. Percent of Applicable Limit %*

C. Particulates

1. Particulates (Half-Lives > 8 Days) Ci O.OOE+01 O.OOE+01 N/A**

2. Average Release Rate For Period ltCi/sec O.OOE+01 O.OOE+01

3. Percent of Applicable Limit %* *

4. Gross Alpha Radioactiviy Ci O.OOE+01 O.OOE+01 D. Tritium

1. Total Release Ci 1.52E+01 1.46E+01 15%

2. Average Release Rate For Period [tCi/sec 1.93E+00 1.86E+00

3. Percent of Applicable Limit %* *

Appilicable Limits are expressed in terms of dose. See Tables 5-8 of the 2008 Radiological Impact Assessment Report.

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

- - N/A - Errors in measurement are notreported for these values since none were identified during the reporting period.

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Gaseous Effluents - Summation of All Releases During the Period Starting: 1-Jun-2008 Ending: 31-Dec-2008 Type of Effluent Units Quarter 3 Quarter 4 Estimated Total Error A. Fission and & Activation Products

1. Total Release Ci 7.87E-01 7.54E-01 11%

2. Average Release Rate For Period pCi/sec 9.90E-02 9.49E-02

3. Percent of Applicable Limit %*

B. Radioiodines Ci O.OOE+01 O.OOE+01 N/A***

1. Total Iodine-131

2. Average Release Rate For Period atCi/sec 0.00E+01 O.OOE+01

3. Percent of Applicable Limit % *

C. Particulates Ci O.OOE+01 O.OOE+01 N/A***

1. Particulates (Half-Lives > 8 Days)

2. Average Release Rate For Period iiCi/sec O.OOE+01 O.OOE+01

3. Percent of Applicable Limit %* *

4. Gross Alpha Radioactiviy Ci O.OOE+01 O.OOE+01 D. Tritium

1. Total Release Ci 1.96E+01 1.03E+01 15%

2. Average Release Rate For Period jLCi/sec 2.47E+00 1.30E+00

3. Percent of Applicable Limit %.* *

Appilicable Limits are expressed in terms of dose. See Tables 5-8 of the 2008 Radiological Impact Assessment Report.

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

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

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Curies released Gaseous Ground Level Releases During the-period Starting: 1-Jan-2008 Ending: 31-Mar-2008 CONTINUOUS BATCH TOTAL FISSION GASES Krypton-87 0.OOE+01 1.17E-03 1.17E-03 Xenon-131m 0.OOE+01 3.62E-02 3.62E-02 Xenon-133 0.OOE+01 3.49E-01 3.49E-01 Xenon-135 O.OOE+01 4.82E-03 4.82E-03 Argon-41 0.OOE+01 4.4 1E+00 4.41E+00 TOTALS 0.OOE+01 4.80E+00 4.80E+00 IOD1NES Iodine- 133 0.OOE+01 0.00E+01 0.OOE+01 Iodine-131 0.OOE+01 0.OOE+01 0.OOE+01 TOTALS 0.OOE+01 0.OOE+01 0.OOE+01 PARTICULATES Cobalt-58 O.OOE+01 0.OOE+01 0.OOE+/-0 I Cobalt-60 0.00E+01 0.OOE+01 0.OOE+01 TOTALS 0.00E+01 0.00E+0I 0.OOE+01 TRITIUM Tritium 1.38E+01 1.39E+00 1.52E+01

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

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Curies released Gaseous Ground Level Releases During the period Starting: 1-Apr-2008 Ending: 30-Jun-2008 CONTINUOUS BATCH TOTAL FISSION GASES Krypton-85 O.OOE+01 3.69E-01 3.69E-01 Xenon-131m O.OOE+01 7.88E-03 7.88E-03 Xenon-133 O.OOE+01 8.97E-02 8.97E-02 Xenon-135 O.OOE+01 4.73E-03 4.73E-03 Argon-41 O.OOE+01 -2.62E+00 2.62E+00 TOTALS O.OOE+01 3.09E+00 3.09E+00 IODINES Iodine-133 O.OOE+O 1 O.OOE+01 O.OOE+O1 Iodine-131 O.OOE+01 O.OOE+01 O.OOE+O 1 TOTALS O.OOE+01 O.OOE+01 O.OOE+O1 PARTICULATES Cobalt-58 O.OOE+01 0.00E+01 O.OOE+01 Cobalt-60 O.OOE+01 O.OOE+01 O.OOE01 TOTALS O.OOE+01 0.00E+01 O.OOE+01 TRITIUM Tritium !.40E+O1 6.25E-01 1.46E+01

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

EI-18

Curies released Gaseous Ground Level Releases During the period Starting: 1-July-2008 Ending: 30-Sep-2008 CONTINUOUS BATCH TOTAL FISSION GASES Krypton-87 O.OOE+01 2.OOE-04 2.OOE-04 Xenon-133 O.OOE+01 2.07E-01 2.07E-0 1 Xenon-135 O.OOE+01 1.42E-02 1.42E-02 Argon-41 O.OOE+01 5.66E-01 5.66E-01 TOTALS O.OOE+01 7.87E-01 7.87E-01 IODINES Iodine- 133 O.OOE+01 0.00E+01 O.OOE+01 Iodine- 131 O.OOE+01 O.OOE+01 O.OOE+01 TOTALS O.OOE+01 O.OOE+01 O.OOE+01 PARTICULATES Cobalt-58 O.OOE+01 O.OOE+O1 O.OOE+O1 Cobalt-60 O.OOE+01 O.OOE+O1 O.OOE+01 TOTALS O.OOE+01 O.OOE+O1 O.OOE+01 TRITIUM Tritium 1.93E+01 3.40E-01 1.96E+01

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

El-19

Curies released Gaseous Ground Level Releases During the period Starting: 1-Oct-2008 Ending: 31-Dec-2008 CONTINUOUS BATCH TOTAL FISSION GASES Xenon-131m O.OOE+01 5.11 E-04 5.11E-04 Krypton-85m O.OOE+01 4.24E-05 4.24E-05 Xenon-133 .0.00E+01 2.74E-01 2.74E-01 Xenon-135 O.OOE+O 1 3.48E-02 3.48E-02 Argon-41 O.OOE+01 4.45E-01 4.45E-01 TOTALS O.OOE+01 7.54E-01 7.54E-01 IODINES Iodine-133 O.OOE4-01 O.OOE+01 O.OOE+01 Iodine-131 O.OOE+01 O.OOE+01 O.OOE+01 TOTALS O.OOE+01 O.OOE+01 O.OOE+01 PARTICULATES Cobalt-581 O.OOE+O 1 O.OOE+01 O.OOE+01 Cobalt-60 O.OOE+O I O.OOE+01 O.OOE+O I TOTALS O.OOE+01 O.OOE+01 o.o0E+1O TRITIUM Tritium 8.48E+00 1.83E+00 1.03E+01

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

E1-20

TABLE B GASEOUS "TYPICAL" LLD EVALUATION('1)

Noble Gas At(2)

Nuclide ODCM LLD lhr 1.5 hr Krypton-87 1.OE-04 2.08E-06 2.73E-06 Krypton-88 1.OE-04 1.61E-06 1.81E-06 Xenon-133 1.OE-04 6.61E-07 6.63E-07 Xenon-133m 1.OE-04 2.34E-06 2.35E-06 Xenon-135 1.OE-04 3.43E-07 3.56E-07 Xenon-138 1.OE-04 1.40E-04 6.10E-04 3

Particulate Sample( ) lhr 24 hr 7.0 day Manganese-54 1.OE-10 7.47E-12 3.12E-13 4.48E-14 Cobalt-58S 1.OE-10 5.62E-12 2.35E-13 ,3.46E- 14 Iron-59 1.OE-10 1.20E- 11 5.02E- 13 7.49E-14 Cobalt-60 1.OE-10 1.07E-11 4.46E- 13 6.38E-14 Zinc-65 1.OE-10 6.71 E- 12 2.80E-13 4.03E-14 Molybdenum-99 1.0E-10 3.43E-1 I 1.61E-12 4.70E-13 Cesium- 134. 1.0E-10 4.25E-12 1.77E-13 2.54E-14 1.OE-10 Cesium-137 8.48E-12 3.54E- 13 5.05E-14 L.OE-10 Cerium-141 5.10E-12 2.15E- 13 3.26E-14 L.OE-10 Cerium- 144 2.0 1E-I1 8.33E-13 1.20E-13 Iodine- 131 1.OE-10 4.76E-12 2.07E-13 3.77E-14 Charcoal Sample Iodine- 131 1.03-11 7.25E-12 3.15E-13 5*.74E-14 (1) LLD values are in jiCi/ml.

(2) At is the time between sample collection and counting time.

(3) LLD based on sample time + 30 min. sample to analysis.

E1-21

TABLE B 1 GASEOUS "TYPICAL" LLD EVALUATION(l Nuclide ODCM LLD Typical LLD Tritium 1.OE-06 1.0E- 11 Gross Alpha 1.OE-11 1.5E-14 Strontium-89 1.OE-11 1.OE-14 Strontium-90 1.OE-11 .OE-15 NOTE: (1) LLD values are in iCi!cc.

EI-22

SOLID WASTE (RADIOACTIVE SHIPMENTS)

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

1. Type of Waste Unit Period Error %

a. Spent Resins, Filter Sludges, Evaporator Bottoms, m3 8.98E+00 +5.OOE-02 etc. Ci 3.97E+02 +I.00E+00

b. Dry Active Waste, Compressible Waste m3 1.21E+02 +I.00E+00 Contaminated Equipment, etc. Ci 1.08E+00 +5.OOE-02

c. Irradiated Components, Control m3 None N/A Rods, etc. Ci None N/A

d. Other: Mechanical Filters m3 3.41E+00 +_.OOE-02 Ci 3.01E+01 +5.OOE-01

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

a. Spent resins, filter sludges, evaporator bottoms, etc. (nuclide§ determined by measurement)

Curies Percent

1. Hydrogen-3 3.1OE-02 0.01

2. Carbon-14 5.37E-02 0.01

3. Beryllium-7. 2.21E+00 0.56

4. Chromium-51 5,76E-02 0.01

5. Manganese-54 1.05E+01 2.65

6. Iron-55 4.09E+01 10.30

7. Cobalt-57 2.38E+00 0.60

8. Cobalt-58 2.48E+01 6.25

.9. Iron-59 6.47E-03 0.00

10. Nickel-59 6.96E-01 0.18

11. Cobalt-60 9.81E+01 24.70

12. Nickel-63 1.74E+02 43.81

13. Zinc-65 1.65E+00 0.41

14. Strontium-89 1.13E-01 0.03

15. Strontium-90 1.50E-01 0.04

16. Zirconium-95 5.04E-02 0.01

17. Niobium-95 7.61E-02 0.02

18. Technetium-99 1.53E-03 0.00

19. Ruthenium- 106 2.07E-02 0.01

20. Silver-I 10m 7.46E-03 0.00

21. Antimony- 124 4.23E-03 0.00

22. Antimony-125 7.02E-01 0.18

23. Cesium-134 1.36E+01 3.42

24. Cesium-137 2.33E+01 5.87

25. Cerium-144 6.54E-01 0.16

26. Plutonium-238 5.42E-04 0.00

27. Plutonium-239/240 5.24E-04 0.00

28. Plutonium-241 3.07E+00 0.77

29. Americium-241 4.56E-04 0.00

30. Curium-242 1.77E-04 0.00

31. Curium-243/244 1.16 E-03 0.00 El-23

SOLID WASTE (RADIOACTIVE SHIPMENTS)

2. Estimate of Major Nuclide Composition (by type of waste) (Cont.)

b. Dry active waste, compressible waste, contaminated equipment, etc. (nuclides determined by estimate)

Curies Percent'

1. Hydrogen-3 1.60E-02 1.47

2. Carbon-14 2.70E-05 0.00

3. Chromium-51 8.24E-02 7.60

4. Manganese-54 2.61E-02 2.40

5. Iron-55 1.63E-01 15.03

6. Cobalt-57 1.59E-03 0.15

7. Cobalt-58 4.23E-01 38.98

8. Iron-59 1.08E-02 0.99

9. Cobalt-60 1.51E-61 13.91

10. Nickel-63 8.91E-02 8.22 1I. Strontium-89 4.03E-03 0.37

12. Strontium-90 6.50E-05 0.01

13. Zirconium-95 2.67E-02 2.46

14. Niobium-95 8.45EL02 7.80

15. Anitrmony-125 9.73E-05 0.01 16.. Cesium-137 1.86E-03 0.17

17. Cerium- 144 4.48E-03 0.41

18. Plutonium-238 - 6.38E-06 0.00

19. Plutonium-239/240 6.78E-06 0.00

20. Plutonium-241 5.83E-05 0.01

21. Americium-241 7.55E-06 0.00

22. Curium-243/244 8.70E-06 0.00

c. Irradiated Components Curies Percent None N/A N/A E1-24

d. Other: Mechanical Filters Curies Percent Hydrogen-3 3.93E-04 0.00

1. 0.00

2. Carbon- 14 4.27E-04 2.07E-01 0.69

3. Chromium-51 1.43E+00 4.74

4. Manganese-54 Iron-55 1.54E+01 51.02 5.

Cobalt-57 8.OOE-02 0.27 6.

Cobalt-58 1.82E+00 6.03 7.

Iron-59 9.22E-03 0.03 8.

Nickel-59 2.78E-02 0.09 9.

Cobalt-60 7.90E+00 26.117 10.

Nickel-63 2.34E+00 7.75 11.

Zinc-65 1.13E-01 0.37 12.

5.98E-04 0.00

13. Strontium-89 Strontium-90 1.41E-03 0.00 14.

2.13E-01 0.71

15. Zirconium-95 Niobium-95 3.14E-0 1 1.04 16.

Technetium-99 6.32E-02 0.21 17.

4.22E-03 0.01

18. Ruthenium- 103 Ruthenium- 106 8.95E-02 0.30 19.

Antimony- 124 2.95E-03 0.01 20.

6.22E-02 0.21

21. Antimony- 125 7.57E-03. 0.03

22. Cesium- 137 7.98E-02 0.26

23. Cerium- 144 9.04E-05 0.00

24. Plutonium-238 Plutonium-239/240 1.46E-04 0.00 25:

Plutonium-241 1.52E-02 0.05 26.

4.57E-05 0.00

27. Americium-241 8.16E-05 0.00

28. Curium-242 1.80E-04 0.00

29. Curium-243/244 EI -25

SOLID WASTE (RADIOACTIVE SHIPMENTS)

3. Solid Waste Disposition

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

Number of Shipments Type Quiantity Mode of Transportation Destination 1 A-LSA II Motor Freight Duratek Processing Facility Barnwell, SC 2 Type B Motor Freight Chem-Nuclear Barnwell, SC

b. Dry active waste, compressible waste, contaminated equipment, etc.

Number of Shipments Type Quantity Mode of Transportation Destination 8 A-LSA II Motor Freight Duratek Processing Facility Oak Ridge, TN.

c. Irradiated components, control rods, etc.

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

d. Other: Mechanical Filters Number of Shipments Type Quantity Mode of Transportation. Destination I A-LSA II Motor Freight Chem-Nuclear Barnwell, SC

4. Irradiated Fuel Shipments (Disposition)

Number of Shipments Type Quantity Mode of Transportation I Destination N/A .

None N/A NIA

5. Solidification of Waste Was solidification performed? No If yes, solidification media:

El-26

Independent Spent Fuel Storage Installation SQN implemented use of an independent spent fuel storage installation (ISFSI) on Julyl3, 2004.

The ISFSI is located on site, within the protected area and is designed to hold 90 spent fuel canisters. The ISFSI is considered part of plant operations for the purposes of the radiological environmental monitoring program.

SQN ISFSI TS 5.4a states "The HI-Storm 100 Cask system does not create any radioactive material or have any radioactive waste treatment systems. Therefore, specific operating procedures for the control of radioactive effluents are not required. Specification 3.1.1, Multi-Purpose Canister (MPC) provides assurances that there are no radioactive effluents from spent fuel storage canister."

The Environmental Protection Agency limits for the total dose to the public in the vicinity of a nuclear power plant, established in the Environmental Dose Standard of 40 CFR 190, are as follows:

Total Body =25 .mrem/year Thyroid =75 mrem/year.

Any other organ =25 mrem/year The SQN ISFSI is considered part of the SQN site and part of plant operations and any radioactive release is included in this report as total site releases. These releases are within 40 CFR 190 limits and 10 CFR 72.104 limits.

EI-27

ENCLOSURE 2 RADIOLOGICAL IMPACT ASSESSMENT REPORT SEQUOYAH NUCLEAR PLANT JANUARY - DECEMBER 2008 E2-1

2008 SEQUOYAH NUCLEAR PLANT.

RADIOLOGICAL IMPACT ASSESSMENT REPORT INTRODUCTION Potential doses to maximum individuals and the population around Sequoyah Nuclear Plant (SQN) 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 SQN.

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."

The limits for doses in unrestricted areas from airborne noble gases releases are:

Less than or equal to 5 mrad per quarter and 10 mrad per year (per reactor unit) for gamma radiation,

-and -

Less than or equal to 10 mrad per quarter and 20 mrad per year (per reactor unit) for beta radiation.

The limit for the dose to a member of the general public in an unrestricted area from iodines and particulates released in airborne effluents is:

Less than or equal to 7.5 mrem per quarter and 15 mrem per year (per reactor unit) to any organ.

The limits for doses to a member of the general public from radioactive material in liquid effluents released to unrestricted areas are:

Less than or equal to 1.5 mrem per quarter and 3 mrem per year (per reactor unit) to the total body,

- and -

Less than or equal to 5 mrem per quarter and 10 mrem per year (per reactor unit) to any organ The Environmental Protection Agency limits for total dose to the public in the vicinity of a nuclear power plant, established in the Environmental Dose Standard of 40 CFR 190 are:

Less than or equal to 25 mrem per year to the total body, Less than or equal to 75 mrem per year to the thyroid,

- and -

Less than or equal to 25 mrem per year to any other organ.

E2-2

DOSE CALCULATIONS Estimated doses to the public are determined using computer models: 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 1 through 9.

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 Discharge Points Releases from SQN are considered ground-level releases. The ground-level Joint Frequency Distribution (JFD) is derived from windspeeds and directions measured 10 meters above ground and from the vertical temperature difference between 10 and 46 meters, and are presented for each quarter in Attachment 1.0.

MeteorologicalData Meteorological variables at SQN are measured continuously. Measurements collected include wind speed, wind direction, and temperature at heights of 10, 46, and 91 meters above the ground. Quarterly joint frequency distributions (JFDs) are calculated for each release point using the appropriate levels of meteorological data. A JFD gives 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 distributioni of noncalm 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 SQN ODCM. The highest of these doses is then selected.

E2-2

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 four 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, however, only those pathways that exist for each receptor are considered in the sum, i.e., 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. To conservatively account for beef ingestion, a beef ingestion dose equal to that for the highest unrestricted area boundary location is added to each identified receptor. For ground contamination, the dose added to the organ dose being calculated is the total body dose calculated for that location, i.e., 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 1-4.

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).

The concentrations of radioactivity in the Tennessee River are estimated by a computer model which uses measured hydraulic data downstream of SQN.. Parameters used to determine the doses are based on guidance given by the NRC (in Regulatory Guides 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 SQN ODCM.

Liquid Release Points and River Data Radioactivity concentrations in the Tennessee River are calculated assuming that releases in liquid effluents are continuous. Routine liquid releases from SQN, located at Tennessee River Mile 484, 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-fifth 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 the first downstream dam, at Tennessee River Mile 471.

E2-3

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-(Ea'stýSi'd&Utilities).

This could be interpreted as indicating that the maximum individual, as assumed for liquid releases from Sequoyah, is an individual who obtains all of his drinking water at East Side Utilities, consumes fish caught from the Tennessee River between SQN 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 Sequoyah. Dose estimates for the maximum individual due to liquid effluents for each quarter in the period are presented in Tables 5-8, along with the average river flows past the plant site for the periods.

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 Population doses for highest exposed organ due to airborne effluents are calculated for an estimated 1,060,000 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 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

dosesare 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 1-4 and Tables 5-8.

DIRECT RADIATION External gamma radiation levels were measured by thermoluminescent dosimeters (TLDs) deployed around SQN as part of the offsite Environmental Radiological Monitoring Program.

The quarterly gamma radiation levels determined from these TLDs during this reporting period averaged approximately 9.75 mR/quarter at onsite (at or near the site boundary) stations and approximately 8.5 mR/quarter at offsite stations, or approximately 1.25 mR/quarter higher onsite than at offsite stations. This difference is consistent with levels measured for preoperation and construction phases of the TVA nuclear plant site where the average radiation levels onsite were generally 2-6 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 TLD readings tend to mask any small increments which E2-4

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 SQN Offsite Dose 'Calculation Manual, 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 fence for an entire work year (2000/8760 hours).

Results from onsite TLD measurements for the calendar year in question indicate that the highest onsite TLD reading was 73 mrem. Using this value, and subtracting an annual background value of 39 mrem/year, and multiplying by the ratio of the occupancy times, the external dose was 7.76 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 well 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 SQN radioactive effluents and 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 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 9.

E2-5

Tables 1 and 2 Doses from Airborne Effluents First Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distance/Unit External Gamma Air 5.14E-03 mrad 5 mrad <1 N/950/M Beta Air 1.86E-03 mrad 10 mrad <1 N/950/M Submersion Total Body 2.96E-03 mrad 10 mrad <1 N/1295/M Skin 4.37E-03 mrad 10 mrad <1 N1295/M Organ Doses Child/Thyroid 7.12E-03 mrem 7.5 mrem <1 N/1829/M Child/Total Body 7.12E-03 mrem 7.5 mrem <1 N/1829/M Population Doses Total Body Dose 1.88E-02 man-rem Maximum Organ Dose (organ) 1.88E-02 man-rem (Thyroid, Liver, Bone, GIT, Lung, Kidney)

Second Quarter IndividualDoses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distance/Unit r External Gamma Air 3.75E-03 nrad 5 mrad <1 N/950/M Beta Air 1.46E-03 mrad 10 mrad <1 N/950/M

.Submersion Total Body 2.15E-03 mrad 10 mrad <1 N/1295/M Skin 3.22E-03 mrad 10 mrad <1 N/1295/M Organ Doses "

Child/Thyroid 9.01E-03 mrem 7.5 mrem <1 S/2093/MI Child/Total Body 9.01E-03 mrem 7.5 mrem <1 S/2093/M Population Doses Total Body Dose 5.28E-02 man-rem Maximum Organ Dose (organ) 5.28E-02 man-rem (Thyroid, Liver, Bone, GIT, Lung, Kidney)

Populationdoses can be compared to the natural backgrounddosefor the entire 50-mile population of about 95,400 man-rem/year (basedon 90 mrem/yearfor natural background).

E2-6

Tables 3 and 4 Doses from Airborne Effluents Third Quarter Individual Doses Quarterly Percent of Location Pathway' Dose Limit Limit Sector/Distance/Unit External Gamma Air 8.14E-04 mrad 5 mrad <1 N/950/M Beta Air 3.24E-04 mrad 10 mrad <1 N/950/M Submersion Total Body 6.16E-04 mrad 10 mrad <1 S/1786/M Skin 9.18E-04 mrad 10 mrad <1 S/1786/M Organ Doses Child/Thyroid 1.62E-02mrem 7.5 mrem <1 S/2093/M Child/Total Body 1.62E-02 mrem 7.5 mrem <1 S/2093/M Population Doses Total Body Dose 9.09E-02 man-rem Maximum Organ Dose (organ) 9.09E-02 man-rem (Thyroid, Liver, Bone, GIT, Lung, Kidney)

Fourth Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distance/Units External Gamma Air 5.21E-04 mrad 5 mrad <1 SSW/1840/M Beta Air 2.30E-04 mrad 10 mrad <1 SSW/1840/M Submersion Total Body 3.91E-04 mrad 10 mrad <1 S/1786/M Skin 5.89E-04 mrad 10 mrad <1 S/1786/M Organ Doses Child/Thyroid 6.63E-03 mrem 7.5 mrem <1 S/2093/M Child/Total Body 6.63E-03 mrem 7.5 mrem <1 S/2093/M Population Doses Total Body Dose 4.76E-02 man-rem Maximum Organ Dose (organ) 4.76E-02 man-rem (Thyroid, Liver, Bone, GIT, Lung, Kidney)

Populationdoses can be compared to the naturalbackgrounddose for the entire 50-mile population of about 95,400 man-rem/year (based on 90-mrem/yearfor natural background).

E2-7

Tables 5 and 6 Doses from Liquid Effluents First Quarter Individual Doses (mrem)

Quarterly Percent of

AgeGroup Organ Dose Limit Limit Child Total Body 3.20E-03 1.5 mrem <1 %

Child Liver 3.30E-03 5 mrem <1 %.

Child Thyroid 3.20E-03 5 mrem <1 %

Average Riverflow past SQN (cubic feet per second): 22,420 Population Doses Total Body Dose 2.OOE-01 man-rem Maximum Organ Dose (organ) 2.OOE-01 man-rein (GIT, Bone, Thyroid, Liver, Kidney, Lung)

Second Quarter Individual Doses (mrem)

Quarterly Percent of Age Group Organ Dose Limit Limit Child Total Body 4.70E-03 1.5 mrem j < 1%

Child GIT 4.90E-03 5 mrem < 1%

Child Thyroid 4.70E-03 5 mrem <1%

_______ I _______ _______ I_______ I _______

Average Riverflow past SQN (cubic feet per second): 10,941 Population Doses Total Body Dose 3.1OE-01 man-rem Maximum Organ Dose (organ) 3.1OE-01 man-rem (Bone, Liver, GIT, Thyroid, Kidney, Lung)

Populationdoses can be compared to the naturalbackgrounddose for the entire 50-mile populationof about 95,400 man-rem/year (based on 90 mrem/yearfor naturalbackground).

E2-8

Tables 7 and 8 Doses from Liquid Effluents Third Quarter Individual Doses (mremr)

Quarterly Percent of Age Group Organ Dose Limit Limit Child Total Body 1.80E-03 1.5 mrnem <1 %

Child Liver 1.80E-03 5 mrem <1 %

Child Thyroid 1.80E-03 5 mrem <1 %

Average Riverflow past SQN (cubic feet per second): 17176 Population Doses Total Body Dose 1.20E-01 man-rem Maximum Organ Dose (organ) 1.20E-01 man-rem (GIT, Bone, Thyroid, Liver, Kidney, Lung)

Fourth Quarter Individual Doses (mrem)

Quarterly Percent of Age Group Organ Dose Limit Limit Child Total Body 5.40E-03 1.5 mrem < 1%

Child GIT 5.40E-03 5 mrem <1 %

Child Thyroid 5.40E-03 5 mrem <1 %

Average Riverflow past SQN (cubic feet per second): 18,871 Population Doses Total Body Dose 3.60E-01 man-rem Maximum Organ Dose (organ) 3.60E-01 man-rem (Bone, Liver, GIT, Thyroid, Kidney, Lung)

Population doses can be comparedto the naturalbackgrounddose for the entire 50-mile population of about 95,400 man-rem/year (basedon 90 mrem/year for natural background).

E2_9

Table 9 Total Dose from Fuel Cycle First Second Third Fourth Dose Quarter Quarter :,,,,Quarter, Quarter Total Body or any Organ (except thyroid)

Total body air submersion 2.96E-03 2.15E-03 6.16E-04 3.91E-04 Critical organ dose (air) 7.12E-03 9.01E-03 1.62E-02 6.63E-03 Total bodydose (liquid) 3.20E-03 4.70E-03 1.80E-03 5.40E-03 Maximum organ dose (liquid) 3.30E-03 4.90E-03 1.80E-03 5.40E-03 Direct Radiation Dose 0.OOE-00 0.00E-00 0.00E-00 O.00E-00 Total 1'66E-02 2.08E-02 2.04E-02 1.78E-02 CumulativeTotal Dose (Total body or any other organ) mrem 7.56E-02 Annual Dose Limit (mrem) 25 Percent of Limit 0.30 Thyroid Dose (mrem Total body air submersion 2.96E-03 2.15E-03 6.16E-04 3.91E-04 Thyroid dose (airborne) 7.12E-03 9:01E-03 1.62E-02 _6.63E-03 Total body dose (liquid) 3.20E-03 4.70E-03 1.80E-03 5.40E-03 Thyroid dose (liquid) 3.20E-03 4.70E-03 1.80E-03 5.40E-03 Direct Radiation Dose 0.OOE-00 0.OOE-00 0.00E-00 0.OOE-00 Total 1.65E-02 2.06E-02 2.04E-02 1.78E-02 Cumulative Total Dose (Thyroid) mnrem 7.53E-02 Annual Dose Limit (mrem) 75 Percent of Limit 0.10 E2-10

Attachment 1.0 Joint Frequency Distribution Tables Al-I

.JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T <= -1.9 C/100 M' Sequoyah Nuclear Plant JAN 1, 2008 - MAR 31, 2008 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 0.046 0.000 0.139 0.000 0.000 0.000 0.185 NNE 0.000 0.000 0.000 0.139 0.278 0.046 0.000 0.000 0.000 0.463 NE 0.000 0.000 0.000 0.093 0.185 0.185 0.000 0.000 0.000 0.463 ENE 0.000 0.000 0.000 0.093 0.046 0.000 0.000 0.000 0.000 0.139 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 0.185 0.231 0.046 0.000 0.000 0.463 SSW 0.000 0.000 0.000 0.046 0.370 0.093 0.000 0.000 0.000. 0.509 SW 0.000 0.000 0.000 0.046 0.185 0.231 0.046 0.000 0.000 0.509 WSW 0.000 0.000 0.000 0.000 0.046 0.093 0.046 0.000 0.000 0.185 W 0.000 0.000 0.000 0.000 0.093 0.185 0.046 0.000 0.000 0.324 WNW 0.1000 0.000 0.000 0.000 0.000 0.417 0.000 0.000 0.000 0.417 NW 0.000 0.000 0.000 0.000 0.000 0. 602 0.000 0.000 0.000 0. 602 NNW 0.000 0.000 0.000 0.000 0.046 0.370 0.000 0.000 0.000 0.417 SUBTOTAL 0.000 0.000 0.000 0.463 1.435 2.593 0.185 0.000 0.000 4 . 676 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2160 TOTAL HOURS OF STABILITY CLASS A 101 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 101 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2160 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/05/07 MEAN WIND SPEED = 7.96 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A1-2

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9 < DELTA T <= -1.7 C/100 M)

Sequoyah Nuclear Plant JAN 1, 2008 - MAR 31, 2008 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 0.139 0.139 0.093 0.000 0.000 0.000 0.370 NNE 0.000 0.000 0.000 0,231 0.231 0.000 0.000 0.000 0.000 0.463 NE 0.000 0.000 0.046 0.278 0.139 0.046 0.000 0.000 0.000 0.509 ENE 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000, 0.093 E 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 ESE 0.000 0.000 .0000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 SE 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 SSE 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046

'S 0".000 0.000 0.000 0.000 0.093 0.046 0.000 0.000 0.000 0.139 SSW 0.000 0.000 0.000 0.185 0.463 0.046 0.000 0.000 0.000 0.694 SW 0.000 0.000 0.000 0.185 0.324 0.093 0.093 0.000 0.000 0.694 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.046 W 0.000 0.000 0.000 0.046 0.000 0.139 0.000 0.000 0.000 0.185 WNW 0.000 0.000 0.000 0.000 0.000 0.231 0.000 0.000 0.000 0.231 NW 0.000 0.000 0.000 0.000 0.046 0.185 0.000 0.000 0.000 0.231 NNW 0.000 0.000 0.o000 0.046 0.000 0.231 0.000 0.000 0.000 0.278 SUBTOTAL 0.000 0.000 . 0.093 1.296 1.435 1.157 0.139 0.000 0.000 4.120 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2160 TOTAL HOURS OF STABILITY CLASS B 89 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 89 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2160 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/05/07 MEAN WIND SPEED = 6.88 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM []NRO[]NDED NUNMERS A1-3

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7 < DELTA T <= -1.5 C/100 M)

Sequoyah Nuclear Plant JAN I, 2008 - MAR 31, 2008 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 0.093 0.139 0.046 0.000 0.000 0.000 0.278 NNE 0.000 0.000 0.093 0.093 0.278 0.046 0.000 0.000 0.000 0.509 NE 0.000 0.000 0.185 0.093 0.324 0.000 0.000 0,000 0.000 0.602 ENE 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0,046 E 0.000 0.000 0.046 0.000 0.000 0.000 0:000 0.000 0.000 0,046 ESE 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.000 0.093 SE 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.093 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 0.046 0.046 0.185 0.000 0.000 0.000 0.278 SSW 0.000 0,000 0.000 0.324 0.324 0.231 0.000 0.000 0.000 0.880 SW 0.000 0.000 0.046 0. 926 0.463 0.000 0.000 0.000 0.000 1.435 WSW 0.000 0.000 0.000 0:046 0.046 0.185 0.000 0.000 0.000 0.278 W 0.000 0.000 0.046 0.000 0.046 0.093 0.046 0.000 0.000 0.231 WNW 0.000 0.000 0.000 0.000 0.000 0.139 0.093 0.000 0.000 0.231 NW 0.000 0.000 0.000 0.000 0.093 0.139 0.000 0.000 0.000 0.231 NNW 0.000 0.000 0.000 0.000 0.000 0.231 0.000 0.000 0.000 0.231 SUBTOTAL 0.000 0.000 0.463 1.806 1.759 1.296 0.139 0.000 0.000 5.463 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2160 TOTAL HOURS OF STABILITY CLASS C 118 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 118 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2160 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/05/07 MEAN WIND SPEED = 6.30 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A1-4

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5 < DELTA T <= -0.5 C/100 M)

Sequoyah Nuclear Plant JAN 1, 2008 - MAR 31, 2008 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 0.741 1.528 .1 .111 0.509 0.000 0.000 3.889 0'. 000 NNE 0.000 0.000 1 .296 1. 620 2 .083. 1 .435 0.000 0.000 0.000 6.435 NE 0.000 0 .046 1 .065 0.417 0. 139 0. 000 0.000 0.000 1.667 ENE 0.000 0.000 0. 185 0.000 0 .000 0.000 0.000 0.000 0.000 0.185 E 0.000 0.000 0.139 0.000 0.000 0.000 0.000 0.000 0.000 0.139 ESE 0.000 0.046 0.093 0. 000 0.000 0.000 0.000 0.000 0.000 0.139 SE 0.000 0 .046 0 .324 0. 000 0.000 0. 000 0.000 0.000 0.000 0.370

'SSE 0.000 0.000 0.185 0. 185 0.000 0. 139 0.093 0.000 0.000 0.602 S 0.000 0.093 0.833 0. 648 0. 648 0. 926 0.040 0.000 0.000 3.194

,SSW 0.000 0.000 1 .111 3. 056 1.713 0. 648 0.000 0.000 0.000 6.528 SW 0.000 0. 046' 1.574 2.130 0.741 0.370 0.000 0.000 0.000 4.861 WSW 0.000 0.046 0.324 0.231 0.185 0.509 0.000 0.000 0.000 1.296 W 0.000 0.139 0.278 0.185 0. 648 0.556 0.093 0.000 0.000 1.898 WNW 0.000 0.000 0.139 0. 417 0.556 0. 694 0.139 0.000 0.000 1.944 NW 0.000 0.000 0.185 0. 509 1.019 1.296 0_046 0.000 0.000 3.056 NNW 0.000 0.000 0.417 0. 972 1 .i9 0.833 0.000 0.000 0.000 3.333 SUBTOTAL 0.000 0.463 8.8.89 11.898 9. 954 7 917 0.417 0.000 0.000 39.537 TOTAL HOURS OF VALID STABILITY O0BSERVATIONS 2160 TOTAL HOURS OF STABILITY CLASS D 854 TOTAL HOURS OF VALID WIND DIRECT] ION-WIND SPEED-STABILITY CLASS D 854 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2160 TOTAL HOURS CALM 0 M

METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/05/07 MEAN WIND SPEED 5.47 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED 'FROM UNROUNDED NUMBERS A1-5

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5 < DELTA T <= 1.5 C/100 M)

Sequoyah Nuclear Plant-JAN 1, 2008 - MAR 31, 2008 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 .006 0.27.8 1 .806 1.019 0. 139 0.000 0.000 0. 000 0.000 3.247 NNE 0 .009 0.139 2.963 1 .111 0. 463 0.046 0.000 0.000 0.000 4.731 NE 0.002 0.093 0.602 0.093 0.000 0.000 0.000 0.000 0.000 0.789 ENE 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 E 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 ESE 0.000 0.046 0",000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SE 0.000 0.093 0.000 0.046 0.000 0.000 0.000 0..000 0.000 0.139 SSE 0.000 0.046 0.046 0. 139 0.093 0.231 0.000 0.000 0.000 0.556 S 0 .004 0.185 1 .204 0.741 0.880 1.620 0.000 0.000 0.000 4. 634 SSW 0.006 0.046 1.944 2.269 1 .296 0.231 0.000 0.000 0.000 5.793 SW 0.006 0.139 1.806 1 .065 0.231 0.139 0.000 0.000 0.000 3.385 WSW 0 .004 0.139 1 .111 0. 741 0. 046 0:046 0.000 0.000 0.000 2.087 W 0.003 0.231 0.741 0 .602 0. 278 0.139 0.000 0.000 0.000 1 . 994 WNW 0.001 0.046 0.370 0.185 0. 185 0.185 0.000 0.000 0.000 0. 973 NW 0.002 0.139 0.556 0.046 0.000 0.046 .0.000 0.000 0.000 0.789 NNW 0.003 0.278 0. 694 0. 602 0. 046 0.046 0.000 0.000 0.000 1.670 SUBTOTAL 0.046 1.991 13.843 8.657 3. 657 2.731 0.000 0.000 0.000 30.926 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2160 TOTAL HOURS OF STABILITY CLASS E 668 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 668 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2160 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/05/07 MEAN WIND SPEED = 3.95 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A1-6

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITXY CLASS F ( 1.5 < DELTA T <= 4.0 C/100 M)

Sequoyah Nuclear Plant JAN 1, 2008 - MAR 31, 2008 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 0.046 0.417 0.046 0.000 0.000 0.000 0.000 0.000 0.509 NNE 0.000 0.139 2.593 0.139 0.000 0.000 0.000 0.000 0.000 2.870 NE 0.000 0.185 1 .157 0.000 0.000 0.000 0.000 0.000 0.000 1.343 ENE 0.000 0.139 0 .231 0.000 0.000 0.000 0.000 0.000 0.000 0.370 E o. oob 0.046 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.139 ESE 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.093 SE 0.000 0.093 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.185 SSE 0.000 0,139 0.185 0.000 0.00,0 0.000 0.000 0.000 0.000 0.324 S 0.000 0.139 .0.556 0.046 0.000 0.000 0.000 0.000 0.000 0.741 SSW 0.000 0.185 1.713 0.046 0.000 0.000 0.000 0.000 0.000 1.944 SW 0.000 0.093 1.111 0.185 0.000 0.000 0.000 0.000 0.000 1.389 WSW 0.000 0.000 ,0.231 0.046 0.000 0.000 0.000 0.000 0.000 0.278 W 0.000 0.046 0.139 0.000 0.000 0.000 0.000 0.000 0.000 0.185 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.139 0.046 0.000 0.000 0.000 0.000 0.000 0.185 NNW 0 .000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SUBTOTAL 0.000 1.250 8.796 0.556 0.000 0.000 0.000 0.000 0.000 10.602 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2160 TOTAL HOURS OF STABILITY CLASS F 229 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 229 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2160 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/05/07 MEAN WIND SPEED = 2.18 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A1-7

JOINT PERCENTAGE FREQUENCIES OF' WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

Sequoyah Nuclear Plant.

JAN 1, 2008 - MAR 31, 2008 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 .046 0.139 0.000 0 .000 0.000 0.000 0.000 0.000 0.185 NNE 0.000 0.046 0.741 0.046 0.000 0.000 0.000 0.000 0.000 0.833 NE 0.000 0.139 0.509 0.046 0.000 0.000 0.000 0.000 0.000 0.694 ENE 0.000 0.139 0.139 0.000 0. 000 0.000 0.000 0.000 0.000 0.278 E 0.000 0.139 0.046 0. 000 0. 000 0.000 0.000 0.000 0.000 0.185 ESE 0.000 0.139 0.093 0. 000 0. 000 0.000 0.000 0.000 0.000 0.231 SE 0.000 0 .046 0.000. 0. 000 0.000 0.000 0.000 0.000 .0.000 0.046 SSE 0.000 0.000 0.093 0.000 '0.000 0.000 0.000 0.000 0.000 0.093 S 0.000 0.093 0.139 0 .046 0.000 0.000 0.000 0.000 0.000 0.278 SSW 0.000 0.000 0.833 0 .046 0.000 0.000 0.000 0.000 0.000 0.880 SW o ooo 0.000 0.880 0.046 0.000 0.000 0.000 0.000 0.000 0.926 WSW 0.000 0.000 0. 046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 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 0.000 0. 000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0 .000 0. 000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0 .000 0 .000 0 000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0 .787 3. 657 .0.231 0.000 0.000 0.000 0.000 0.000 4.676 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2160 TOTAL HOURS OF STABILITY CLASS G 101 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 101 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2160 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/05/07 MEAN WIND SPEED = 2.17 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A1-8

JOINT PERCENTAGE FREQUENCIES OF-WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T <= -1.9 C/100 M)

Sequbyah Nuclear Plant APR 1, 2008 - JUN 30, 2008 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 0.046 0.369 0,507 0.046 0.000 0.000 0.000 0.968 NNE 0.000 0.046 0.277 1.245 0.876 0.138 0.000 0.000 0.000 2.582 NE 0.000 0.000 0.231 1 .014 0.231 0.092 0.000 0.000 0.000 1.568 ENE 0:000 0.000 0.092 0.138 0.000 0.000 0.000 0.000 0.000 0.231 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 0.046 0.000 0.046 0.000 0.000 0.000 0.092 S 0.000 0.000 0.046 0.046 0.092 0.092 0.000 0.000 0.000 0.277 SSW 0.000 0.000 0.000 0.461 1.153 *0. 599 0.000 0.000 0.000 2.213 SW 0.000 0.000 0.000 0.645 1.060 0.138 0.000 0.000 0.000 1.844 WSW 0.000 0.000 0.092 0.000 0.184 0.000 0.000 0.000 0.000 0.277 W 0.0.00 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.092 WNW 0.000 0.000 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0:092 NW 0.000 0.000 0.000 0.000 0.231 0.092 0.000 0.000 0.000 0.323 NNW 0.000 0.000 0.000 0.138 0.323 0.231 0.000 0".000 0.000 0.692 SUBTOTAL 0.000 0.046 0.784 4 .103 4 .703 1. 614 0.000 0.000 0.000 11.249 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2169 TOTAL HOURS OF STABILITY CLASS A 244 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 244 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2169 TOTAL HOURS CALM *0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/08/05 MEAN WIND SPEED = 5.76 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A1-9

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9 < DELTA T <= -1.7 C/100 M)

Sequoyah Nuclear Plant APR 1, 2008 - JUN 30, 2008 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 0.138 0.138 0. 092 0. 046 0.000 0.000 0.000 0.415 NNE 0.000 0.000 0.231 0.184 0 .046 0.046 0.000 0.000 0.000 0.507 NE 0 .000 0.000 0. 184 0.046 0. 046 0.000 0.000 0.000 0.000 0.277 ENE 0.000 0.000 0.231 0.046 0.000 0.000 0.000 0.000 0.000 0.277 E 0.000 0.000 0.046 0.000 0. 000 0.000 0.000 0.000 0.000 0.046 ESE 0.000 0.000 0.046 0.092 0.000 0.000 0.000 0.000 0.000 0.138 SE 0.000 0.000 0. 046 0.000 0.000 .0. 000 0.000 0.000 0.000 0.046 SSE 0.000 0.000 0.000 0. 046 0.000 0.000 0.000 0.000 0.000 0.046 S 0.000 0.000 0. 046 0.507 0.092 0. 277 0.000 0.000 0.000 0.922 SSW 0.000 0.000 0. 277 0.830 0.507 0. 184 0.000 0.000 0.000 1.798 SW 0.000 0.000 0. 138 0.553 0. 461 0. 046 0.000 0.000 0.000 1.199 WSW 0.000 0.000 0. 000 0. 184 0.000 0.092 0.092 0.000 0.000 0.369 W 0.000 0.000 0.000 0. 138 0.092 0.000 0.000 0.000 0.000 0.231 WNW 0.000 0.000 0.000 0. 046 0.046 0.092 0.000 0.000 0.000 0.184 NW 0.000 0.000 0.000 0.000 0.000 0. 046 0.000 0.000 0.000 0.046 NNW .0.000 0.000 0. 046 0. 138 0.046 0.000 0.000 0.000 0.000 0.231 SUBTOTAL 0.000 0.000 1.429 2.951 1.429 0.830 0.092 0.000 0.000 6.731 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2169 TOTAL HOURS OF STABILITY CLASS B 146 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 146 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2169 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/08/05 MEAN WIND SPEED = 5.19 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-10

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7 < DELTA T <= -1.5 C/100 M)

Sequoyah Nuclear Plant APR 1, 2008 - JUN 30, 2008 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 1.2.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000 0.000 0.138 0.046 0.092 0.046 0.000 0.000 0.000 0.323 NNE 0.000 0.000 0.138 0.000 0.092 0.000 0.000 0.000 0.000 O .231 NE 0.000 0.000 0.277 0.092 0.000 0.000 0.000 0.000 0.000 0.369 ENE 0.000 0.000 0.092 0.046 0.000 0.000 0.000 0.000 0.000 0.138 E 0.000 0.000 0. 092 0.000 0. 000 0.000 0.000 0.000 0.000 0.092 ESE 0.000 0.000 0.000 0.046 0.000 0.000 o0.000 0.000 0.000 0.046 SE 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.092 SSE 0.000 0.000 0.046 0.092 0.000 0.000 0.000 0.000 0.000 0.138 S 0.000 0.000 0.046 0.369 0.277 0.046 0.000 0.000 0.000 0.738 SSW 0.000 0,000 0.138 1.107 0.369 0.092 0.000 0.000 0.000 1.706 SW 0.000 0.000 0.277 0.876 0.323 0.092 0.000 0.000 0.000 1.568 WSW 0.000 0.000 0.046 0.092 0.138 0. 092 0.000 0.000 0.000 0.369 W 0.000 0.000 0.046 0.092 0.000 0.000 0.000 0.000 0.000 0.138 WNW 0.000 0.000 0.000 0.046 0.046 0.046 0.000 0.000 0.000 0.138 NW 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 NNW 0.000 0.000 0.000 0.138 0.092 0.092 0.000 0.000 0.000 0.323 SUBTOTAL 0.000 0.000 1.429 3.043 1.475 0.507 0.000 0.000 0.000 6.455 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2169 TOTAL HOURS OF STABILITY CLASS C 140 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 140 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2169 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/08/05 MEAN WIND SPEED = 4.82 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-I1

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5 < DELTA T <= -0.5 C/100 M)

Sequoyah Nuclear Plant APR 1, 2008 - JUN 30, 2008 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 0.092 1 .291 0.922 0.830 0.000 0.000 0.000 0.000 3.135 NNE 0.000 0.092 0.968 0.922 0. 369 0.092 0.000 0.000 0.000 2.444 NE 0.000 0 .046 0.415 0.138 0.092 0 .00 0.000 0.000 0.000 0.692 ENE 0.000 0.000 0. 184 0.046 0.000 0.000 0.000 0.000 0.000 0.231 E 0.0bo 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.092 ESE 0.000 0.000 0. 184 0.000 0.000 0.000 0.000 0.000 0.000 0.184 SE 0.000 0 .046 0. 138 0.000 0.000I 0.000 0.000 0.000 0.000 0.184 SSE 0.000 0 .046 0.369 0.369 0.000 0. 138 0.000 0.000 0.000 0.922 S 0.000 0 .046 1 .568 1.291 0. 968 0. 369 0.000 0.000 0.000 4.242 SSW 0.000 0. 092 2 .720 2.951 1. 245 0. 369 0.000 0.000 0.000 7.377 SW 0.000 0 .046 1 .245 2.075 1 .337 0. 1338 0.000 0.000 0.000 4.841 WSW 0.000 0.000 0.415 0.692 0. 461 0.092 0.000 0.000 0.000 1.660 W 0.000 0 .046 0.092 0.184 0. 231 0. 415 0.046 0.000 0.000 1.014 WNW 0.000 0 .138 0.046 0.138 0. 323 0. 184 0.000 0.000 0.000 0.830 NW 0.000 0.000 0.323 0.369 0 .277 0. 138 0.000 0.000 0.000 1. 107 NNW 0.000 0 .046 0.553 0.738 0. 461 0.231 0.000 0.000 0.000 2.029 SUBTOTAL 0.000 0.738 10.604 10.834 6.593 2.167 0.046 0.000 0.000 30.982 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2169 I.

TOTAL HOURS OF STABILITY CLASS D 67,2 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 672 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2169 TOTAL HOURS CALM 1 0 METEOROLOGICAL FACILITY: Sequoyak Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/08/05 MEAN WIND SPEED = 4.42 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-12

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5 < DELTA T <= 1.5 C/100 m)

Sequoyah Nuclear Plant APR i, 2008 - JUN 30, 2008 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 0.006 0.277 2.582 0.876 0.277 0.000 0.000 0.000 0.000 4.017 NNE 0.005 0.369 1 .706 0.277 0.000 0.000 0.000 0.000 0.000 2.356 NE 0.001 0.277 0. 184 0.092 0.000 0.000 0.000 0.000 0.000 0.554 ENE 0.001 0.231 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.231 E 0.000 0.092 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.185 ESE 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.092 SE 0.000 0.046 0.138 0.000 0.000 0.000 0.000 0.000 0.000 0.185 SSE 0,002 0.138 0.645 0. 046 0.000 0.092 0.000 0.000 0.000 0.924 S 0.005 0.092 2.075 1.107 0.599 0.231 0.000 0.000 0.000 4.108 SSW 0.009 0.369 3.873 1 .614 0.277 0.046 0.000 0.000 0.000 6.187 SW 0.007 0.138 2.997 1.014 0.277 0.000 0.000 0.000 0.000 4.433 WSW 0.004 0.138 1.568 0. 461 0.000 0.000 0.000 0.000 0.000 2.171 W 0.001 0.092 0.461 0.184 0.000 0.000 0 .000 0.000 0.000 0.739 WNW 0.001 0.046 0.184 0.046 0.138 0.000 0.000 0.000 0.000 0.415 NW 0.001 0.184 0.369 0,092 0.000 0.046 0.000 0.000 0.000 0.693 NNW 0.003 0.184 1.337 0.692 0.138 0.000 0.000 0.000 0.000 2.355 SUBTOTAL 0.046 2.720 18.257 6.501 1.706 0,415 0.000 0.000 0.000 29.645 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2169 TOTAL HOURS OF STABILITY CLASS E 643 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 643 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2169 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/08/05 MEAN WIND SPEED = 2.98 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-13

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLA.SS F ( 1.5 < DELTA T <= 4.0 C/100-M)

Sequoyah Nuclear Plant APR 1, 2008 - JUN 30, 2008 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 0.645 1.936 0.184 0.000 0.000 0.000 0.000 0.000 2.766 NNE 0.000 0 .645 2.812 0.000 0.000 0.000 0.000 0.000 0.000 3.458 NE 0.000 0 .369 0.507 0.000 0.000 0.000 0.000 0.000 0.000 0.876 ENE 0 .000. 0.231 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.277 E 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.092 ESE 0.000 0.323 0.000 0.000 0. 000 0.000 0.000 0.000 0.000 0.323 SE 0.000 0 .369 0. 184 0.000 0. 000 0.000 0.000 0.000 0.000 0.553 SSE 0 000 0 .231 0. 138 0.000 0. 000 0.000 0.000 0.000 0.000 0.369 S 0.000 0. 184 0.369 0.000 0.000 0.000 0.000 '0.000 0.000 0.553 SSW 0.000 0.138 0. 830 0.000 0. 000 0.000 0.000 0.000 0.000 0.968 SW 0.000 0.046 0 .599 0.000 0. 000 0.000 0 000 0.000 0.000 0.645 WSW 0.000 0.046 0 .000 0.000 0. 000 0.000 0 .000 0.000 0.000 0.046 W 0.000 0.000 0. 184 0.000 0 . 000 0.000 0 .000 0.000 0.000 0.184 WNW 0.000 0.092 0. 138 0 .000 0. 000 0.000 0. 000 0.000 0.000 0.231 NW 0.000 0.138 0. 323 0 .138 0.000 0.000 0.000 0.000 0.000 0.599 NNW 0 .000 0.184 0.784 0 .046 0.000 0.000 0.000 0.000 0.000 1.014 SUBTOTAL 0 .000 3.734 8.852 0.369 0.000 0.000 0.000 0.000 0.000 12.955 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2169 TOTAL HOURS OF STABILITY CLASS F 281 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 281 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2169 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/08/05 MEAN WIND SPEED = 1.90 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-14

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 q/D00 M)

Sequoyah Nuclear Plant APR 1, 2008 - JUN 30, 2008 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.].84 0.000 0.000 0.000 0.000 0.000 0.000 0.184 NNE 0 .000 0.000 0.323 0.000 -. 0. 000 0. 000 0.000 0.000 0.000 0.323 NE 0.000 0.046 0,138 0.000 0.000 0.000 0.000 0.000 0.000 0.184 ENE 0.000 0.046 0,046 0.000 0.0 00 0.000 0.000 0.000 0.000 0.092 E 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 ESE 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SE 0.000 0.046 0.000 0. 000 0.000 0.000 0.000 0.000 0.000 0.046 SSE 0.000 0.184 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.277 S 0.000 0.092 0.277 0.000 0.000 0.000 0.000 0.000 0.000 0.369 SSW 0.000 0.046 0.138 0.000 0. 000 0.000 0 000 0.000 0.000 0.184 SW 0.000 0.000 0.046 .0. 000 0.000 0.000 0.000 0.000 0.000 0.046 WSW 0.000 0.046 0.046 0.000 0.000 0.000 0.000 o 0oo 0.000 0.092 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.046 0.046 0.000 0.000 .0.000 0.000 0.000 0.092 0.000 SUBTOTAL 0.000 0. 645 1.337 0.000 0.000 0.000 0.000 0.000 1.982 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2169 TOTAL HOURS OF STABILITY CLASS G 43 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 43 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2169 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE.PRINTED: 2008/08/05 MEAN WIND SPEED - 1.75 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-15

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T <= -1.9 C/100 M)

Sequoyah Nuclear Plant JUL 1, 2008 - SEP 30, 2008 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 0.048 0:482 0.241 0.000 0.000 0.000 0.000 0.771 NNE 0.000 0.000 0.193 2.071 0.819 0.096 0.000 0.000 0.000 3.179 NE 0.000 0.000 0. 482 1.445 0.530 0.048 0.000 0.000 0.000 2.505 ENE 0.000 0.000 0.048 0.096 ,0.048 0.048 0.000 0.000 0.000 0.241 E 0 000 0.000 0.000 0.193 0.048 0.000 0.000 0.000 0.000 0.241 ESE 0.000 0.000 0.000 0.048 0.000 0.000 0.000 0".000 0.000 0.048 SE 0.000 0 .000 0.000 0.096 0.000 0.000 0.000 0.000 0.000 0.096 SSE 0.000 0.000 0.000. 0.048 0.000. 0.193 0.000 0.000* 0.000 0.241 S 0.000 0.000 0.000 0.145 0.337 0.,048 0.000 0.000 0.000 0.530 SSW 0.000 0.000 0.000 0.337 0.626 0.000 0.000 0.000 0.000 0.963 SW 0.000 0.000 0 .048 0. 626 0.337 0.048 0.000 0.000 0.000 1.060 WSW 0.000 0.000 0.000 0.000 0.289 0.048 0.000 0.000 0.000 0.337 W

N 0.000 0.000 0.000 0.096 0.000 0.000 0.000 0.000 0.000 0.096 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0 .000 0.096 0.000 0.000 0.000 0.000 0.000 0.096 NNW 0.000 o0.0 0 .000 0.096 0.000 0.000 0.000 0.000 0.000 0.096 SUBTOTAL 0.000 0.000 0.819 5.877 3.276 0.530 0.000 0.000 0.000 10.501 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2076 TOTAL HOURS OF STABILITY CLASS A 218 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 218 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2076 TOTAL HOURS CALM 0 METEOROLOGICAL'FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/11/20 MEAN WIND SPEED = 5.13 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-16

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY. CLASS B (-1.9 < DELTA T <= -1.7 C/100 M)

Sequoyah Nuclear Plant .

JUL 1, 2008 - SEP 30, 2008 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

-__7 N 0.000 0.000 0.241 0.241 0.048 0.000 0.000 0.000 0.000 0.530 NNE 0.000 0.000 0. 289 0.530 0.145 0.000 0.000 0.000 0'.000 0.963 NE 0.000 0.000 0. 337 0.241 0.000 0.048 0.000 0.000 0.000 0.626 ENE 0.000 0.000 0.096 0.048 0.000 0.000 0.000 0.000 0.000 0.145 E 0.000 0.000 0.000 0.096 0.000 0.000 0.000 0.000 0.000 0.096 ESE 0.000 0.000 0.000 0.096 0.000 0.000 0.000 0.000 0.000 0.096 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 0.048 0.241 0.048 0.000 0.000 0.000 0.000 0.337 S 0.000 0.000 0.000 0,241 0.048 0.000 0.000 0.000 0.000 0.289 SSW 0.000 0.000 0,048 1.108 0.096 0.000 0.000 0.000 0.000 1.252 SW 0.000 0.000 0.145 0.963 0.048 0.000 0.000 0.000 0.000 1.156 WSW 0.000 0.000 0.048 0.241 0.048 0.000 0.000 0.000 0.000 0.337 W 0.000 0.000 0.048 0..048 0.048 0 .000 0.000 0.000 0.000 0.1,45 WNW 0.000 0.000 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.048 NW 0.000 0.000 0.048 0.096 0.000 0.000 0.000 0.000 0.000 0.145 NNW 0.000 0.000 0.096 0.048 0.000 0.000 0.000 0.000 0.000- 0.145 SUBTOTAL 0.000 0.000 1.445 4.239 0.578 0,048 0.000 0.000 0.000 6.310 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2076 TOTAL HOURS OF STABILITY CLASS B 131 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 131 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2076 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/11/20 MEAN WIND SPEED - 4.27 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-17

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7 < DELTA T <= -1.5 C/100 M)

Sequoyah Nuclear Plant JUL 1, 2008 - SEP 30, 2008 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 0.145 0.289 0.048 0.000 0.000 0.000 0.000 0.482 NNE 0.000 0.000 0.530 0. 626 0.000 0.000 0.000 0.000 0.000 1.156 NE 0.000 0.000 0.337 0.289 0.000 0.000 0.000 0.000 0.000 0.626 ENE 0.000 0.000 0.096 0.000 0.000 0.0001 0.000 0.000 0.000o 0.096 E 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.048 ESE 0.000 0.000 0.096 0.000 0.000 0.000 0.000 0.000 0..000 0.096 SE 0.000 0.000 0.048 0.289 0.000 0.000 0.000 0.000 0.000 0.337 SSE 0. 000. 0.000 0.145 0.145 0.000 0.000 0.000 0.000 0.000 0.289 S 0.000 0.000 0.145 0.385 0.193 0.096 0.000 0.000 0.000 0.819 SSW 0.000 0.000 0.241 0.963 0.096 0.048 0.000 0.000 0.000 1.349 SW 0.000 0.000 0.530 0.578- 0.048 0.000 0.000 0.000 0.000 1.156 WSW 0.000 0.000 0.048 0'. 096 0.048 0.000 0.000 0.000 0.000 0.193 W 0.000 0.000 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.048 WNW 0.000 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.048 NW 0.000 0.000 0.048 0.096 0.048 0.000 0.000 0.000 0.000 0.193 NNW 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.048 SUBTOTAL 0.000 0.000 2.505 3.805 0.530 0. 145 0.000 0.000 0.000 6.985

.TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2076 TOTAL HOURS OF STABILITY CLASS C 145 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 145 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2076 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS.

WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/11/20 MEAN WIND SPEED = 3.99 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-18

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5 < DELTA T <= -0.5 C/100 M)

Sequoyah Nuclear Plant JUL 1, 2008 - SEP 30, 2008 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 0 145 1 .493 1. 301 0. 145 0. 048 0.000 0.000 0.000 3.131 NNE 0.000 0 .048 1 .204 1 927 0. 434 0.000 0.000 0.000 0.000 3.613 NE 0. 000 0 .000 0 .241 0 626 0. 145 0.193 0.000 0.000 0.000 1.204 ENE 0,000 0.000 0 .193 0 337 0. 000 0. 048 0.000 0.000 0.000 0.578 E 0.000 0.000 0 .241 0 241 0. 096 0.000 0.000 0.000 0.000 0.578 ESE 0.000 0.000 0 .289 0 145 0. 048 0.000 0.000 0.000 0.000 0.482 SE 0.000 0.096 0 .482 0 193 D. o48 0.000 0.000 0.000 0.000 0.819 SSE 0.000 0 .000 1. 108 0 482 0. 145 0.000

0. 048 0.000 0.000 0.000 1.734 0.000 0 .048 S 0 .000 2.360 2 505 0.289 0.000 0.000 0.000 5.250 0.000 0. 048 SSW 3.516 1 927 0. 193 0.000 0.000 0.000 5.684 0.000 0. 048 0.000 SW 1..445 0. 674 0. 048 0.000 0.000 .o000 2.216 WSW 0,000 0.000 0D674 0 .482 0.096 0.000 0.000 0.000 0.000 1.252 0 048 W 0.000 0.337 0 145 0.096 0.000 0.000 0.000 0.000 0.626 WNW 0.000 0.096 0.289 0 .241 0.000 0.000 0.000 0.000 0.000 0.626 0.000 0. 000 0.000 NW 0.434 0.096 0. 096 0.000 0.000 o.000 0.626 NNW 0.000 0 193 0.578 0.482 0.048 0.000 0.000 0.000 0.000 1.301 SUBTOTAL 0.000 0.723 14.884 11.802 1.927 0.385 0.000 0.000 0.000 29.721 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2076 TOTAL HOURS OF STABILITY CLASS D . 617 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 617 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2076 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2.008/11/20 MEAN WIND SPEED = 3.53 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-19

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5 < DELTA T <= 1.5 C/100 M)

Sequoyah Nuclear Plant JUL 1, 2008 - SEP 30, 2008 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 0.723 3.998 1.445 0.000 0.000 0.000 0.000 0.000 6.166 NNE 0.000 0.963 3.613 0.530 0.048 0.000 0.000 0.000 0.000 5.154 NE 0.000 0.289 0.385 0.145 0.000 0.000 0.000 0.000 0.000 0.819 ENE 0.000 0.048 0.337 0.000. 0.000 0.000 0.000 0.000 0.000 0.385 E 0.000 0.145 0.096 0.048 0.000 0.000 0.000 0.000 0.000 0.289 ESE 0.000 0.048 0.096 0.000 0.000 0.000 0.000 0.000 0.000 0.145 SE 0.000 0.289 0.193 0.048 0.000 0.000 0<000 0.000 0.000 0.530 SSE 0.000 0.289 0.723 0.096 0.048 0.000 0.000 0.000 0.000 1.156 S 0.000 0.674 1.301 0.289 0.096 0.000 0.000 0.000 0.000 2.360 SSW 0.000 0.289 2.071 0. 145 0.000 0.000 0.000 0.000 0.000 2.505 SW 0.000 0.578 2.360 0.434 0.000 0.000 0.000 0.000 0.000 3.372 WSW 0.000 0.145 1.349 0.289 0.048 0.048 0.000 0.000 0.000 1 .879 W 0.000 0.096 0.626 0.048 0.000 0.000) 0.000 0.000 0.000 0.771 WNW 0.000 0.337 0.337 0.096 0.000 0.000 0.000 0.000 0.000 0.771 NW 0.000 0.241 0.819 0.000 0.000 0.000 0.000 0.000 0..000 1.060 NNW 0.000 0.385 1.879 0.723 0.000 0.048 0.000 0.000 0.000 3.035 SUBTOTAL 0.000 5.539 20.183 4.335 0.2.41 0.096 0.000 0.000 0.000 30.395 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2076 TOTAL HOURS OF STABILITY CLASS E 631 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 631 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY- OBSERVATIONS 2076 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/11/20 MEAN WIND SPEED = 2.32 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDRD NHMRNF.RS Al-20

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5 < DELTA T <= 4.0 C/100 M)

Sequoyah Nuclear Plant JUL 1, 2008 - SEP 30, 2008 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 1.2.5-18.4 18.5-24.4 >=24.5 TOTAL N 0. 015 0.819 3.805 0.193 0.000 0.000 0.000 0.000 0.000 4.832 NNE 0 .017 0.867 4 .287 0.096 0.000 0.000 0.000 0.000 0.000 5.267 NE 0 .003 0. 434 0 .434 0.000 0.000 0. 000 0.000 0.000 0.000 0.870 ENE o .ooo 0.096 0.048 0.048 0.000 0. 000 0.000 0.000 0.000 0.193 E 0. 001 0.241 0.000 0.000. 0.000 0.000 0.000 0.000 0.000 0.242 ESE 0.000 0.096 0 .048 0.000 0.000 0.000 0.000 0.000 0.000 0.145 SE 0.001 0. 145 0 .048 0.000 0 .000 0.000 0.000 0.000 0.000 0.193 SSE 0 .002 0.289 0 .241 0.000 0.000 0.000 0.000 0.000 0.000 0.532 S 0.002 0,289 0 .337 0.000 0.000 0.000 0.000 0.000 0.000 0.628 SSW 0.001 0.096 0 .337 0.048 0.000 0.000 0.000 0.000 0.000 0.483 SW o ooo 0.000 0.000 0 .048 0.000 0.000 0.000 0.000 0.000 0.000 0.048 WSW 0.096 0 .145 0.000 0.000 0.000 0.000 0.000 0.000 0.242 W 0.000 0.048 0.048 0.048 0.000 0.000 0.000 0.000 0.000 0.145 WNW 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048 NW 0.001 0.096 0.241 0.000 0.000 0.000 0.000 0.000 0.000 0.338 NNW 0 .003 0.145 0.771 0.096 0.000 0.000 0.000 0.000 0.000 1.015 SUBTOTAL 0.048 3.805 10.838 0.530 0.000 0.000 0.000 0.000 0.000 15.222 TOTAL IOURS OF VALID STABILITY OBSERVATIONS 2076 TOTAL HOURS OF STABILITY CLASS F 316 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 316 TOTAL HOURS OF VALID WIND DIRECTION-WIND.SPEED-STABILITY OBSERVATIONS 2076 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY:, Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/11/20 MEAN WIND SPEED = 1.93 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-21

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/i00 M)

Sequoyah Nuclear Plant JUL 1, 2008 - SEP 30, 2008 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 0.048 0.145 0.000 0.000 0.000 0.000 0.000 0.000 0.193 NNE 0.000 0.048 0.337 0.000 0.000 0.000 0.000 0.000 0.000 0.385 NE 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048 ENE 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.048 E 0.000 0.048 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.096 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 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.096 0.000 0.000 0.000 0.000 0.000 0.000 0.096 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 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.193 0. 674 0.000 0.000 0.000 0.000 0.000 0.000 0.867 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2076 TOTAL HOURS OF STABILITY CLASS G 18 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 18 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2076 TOTAL HPURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2008/11/20 MEAN WIND SPEED = 2.11 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-22

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

Sequoyah Nuclear Plant OCT 1, 2008 - DEC 31, 2008 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 0.000 0.182 0.091 0.000 0.000 0.000 0.273 NNE 0.000 0.000 0.000 0. 364 0.091 0.409 0.000 0.000 0.000 0.864 NE 0.000 0.000 0.000 0.318 0.182 0.000 0.000 0.000 0.000 0.500 ENE 0.000 0.000 0.000 0 .091 0.000 0.000 0.000 0.000 0.000 0.091 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 0.045 0.000 0.000 0.000 0.000 0.045 S 0.000 0.000 0.000 0. 091 0.091 0.000 0.000 0.000 0.000 0.182 SSW 0.000 0.000 0.091 0. 455 0.273 0.000 0.000 0.000 0.000 0.819 SW 0.000 0.000 0.182 0.364 0.182 0.000 0.000 0.000 0.000 0.728 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 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 WNW 0.000 0.000 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.091 NW 0.000 0.000 0.000 0.000 0.045 0.045 0.000 0.000 0.000 0.091 NNW 0.000 0.000 0.000 0.000 0.045 0.409 0.000 0.000 0.000 0.455 SUBTOTAL 0.000 0.000 0.318 1.729 1 .137 1.046 0.000 0.000 0.000 4 .231 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2'198 TOTAL HOURS OF STABILITY CLASS A 93 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 93 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2198-TOTAL HOURS CALM METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND .45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2009/02/26 MEAN WIND SPEED = 5.93 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-23

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<=-1.7 C/100 M)

Sequoyah Nuclear Plant OCT 1, 2008 - DEC 31, 2008 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 0.000 0.136 0.318 0.000 0.000 0.000 10. 455 NNE 0.000 0.000 0.091 0.546 0.227 0.045 0.000 0.000 0.000 0.910 NE 0.000 0.000 0.136 0.273 0.091 0.045 0.000 0.000 0.000 0.546.

ENE 0.000 0.000 0.000 0.136 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 0.000 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 0.000 0.000 0.000 0.000 0.000 0.000 0.045 S 0.000 0.000 0.000 0.091 0.000 0.045 0.045 '0.000 0.000 0.182 SSW 0.000 0.000 0.045 0.409 0.136 0.045 0.000 0.000 0.000 0.637 SW 0.000 0.000 0.136 0.227 0.045 0.045 0.000 0.000 0.000 0.455 WSW 0.000 0.000 0.045 0.045 0.000 0.091 0.000 0.000 0.000 0.182 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.091 0.045 0. 136 0.000 0.000 0.000 0.273 NNW 0.000 0.000 0.000 0.045 0.136 0.045 0.000 0.ooo 0.000 0.227 SUBTOTAL 0.000 0.000 0.500 1.956 0.819 0.819 0.045 0.000 0.000 4.140 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2198 TOTAL HOURS OF STABILITY CLASS B 91 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 91 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2198 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND. 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2009/02/26 MEAN WIND SPEED = 5.62 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-24

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<=-1.5 C/100 M)

Sequoyah Nuclear Plant OCT 1, 2008 - DEC,31, 2008 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 0.318 0.227 0.227 0.000 0.000 0.000 0.773 NNE 0.000 0.000 0.136 0. 637 0.136 0.091 0.000 0.000 0.000 1.001 NE 0.000 0.000 0.455 0.409 0.045 0.000 0.000 0.000, 0.000 0.910 ENE 0.000 0.000 0.091 0.000 0".000 0.000 0.000 0.000 0.000 0.091 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 0.000 0. 045 0.000 0.000 0.000 0.000 0.000 0.045 SSE 0.000 0 .000 .0.000 0. 136 0.000 0,000 0.000 0.000 0.000 0.136 S 0.000 0.000 0.000 0.182 0.000 0,045 0.000 0.000 0.000 0.227 SSW 0.000 0.000 0.045 0. 364 0.045 0.000 0.000 0.000 0.000 0.455 SW 0.000 0.000 0.091 0. 455 0.000 0.000 0.000 0.000 0..000 0.546 WSW 0.000 0.000 0.045 0. 136 0.000 0.091 0.000 0.000 0.000 0.273 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 0.000 0.000 0.091 0.045 0.000 *0.000 0.000 0.136 NW 0.000 0.000 0.000 0.091 0.091 0.045 0.000 0.000 0.000 0.227 NNW 0.000 0.000 0.000 0. 136 0. 136 0.136 0.000 0.000 0.000 0.409 SUBTOTAL 0.000 0.000 0. 910 2. 957 0.773 0.682 0.000 0.000 0.000 5.323 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2198 TOTAL HOURS OF STABILITY CLASS C 117 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 117 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2198 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2009/02/26 MEAN WIND SPEED = 4.85 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-25

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<=-0.5 C/100 M)

Sequoyah Nuclear Plant OCT 1, 2008 - DEC 31, 2008 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 0.227 .1.137 1.456 1.046 0.9110 0.045 0.000 0.000 4.823 NNE 0.000 0.091 1.911 2.684 1.365 0. 637 0.045 0.000 0.000 6.733 NE 0.000 0.136 1.274 0.728 0.045 0.000 0.000 0.000 0.000 2.184 ENE 0.000 0.091 0.273 0.000 0.000 0.000 0.000 0.000 0.000 0.364 E 0.000 0.091 0.136 0.273 0.000 0.000 0.000 0.000 0.000 0.500 ESE 0.000 0.136 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.273 SE 0.000 0.000 0.227 0.091 0.000 0.000 0.000 0.000 0.0090 0.318 SSE 0.000 0.045 0.227 0.000 0. 045 0.000 0.000 0 .000~ 0.000 0.318 S 0.000 0.045 0. 62 1. 137 0. 409 0.318 0.000 0.000 o .obo 0.000 2.593 SSW 0.000 0.000 1.774 1.046 0.455 0.182 0.000 0.000 0.000 3.458 SW 0.000 0.000 1.501 1.592 0.728 0.318 0.000 0.000 0.000 4.140 WSW 0.000 0.000 0.364 0.637 0.273 0.136 0.000 0.000 0.000 1.410 W 0.000 0.045 0.273 0.045 0.182 0.182 0.000 0.000 0.000 0.728 WNW 0.000 0.000 0.455 0.136 0.091 0.227 0.000 0 000

.0.000 0.000 0.910 NW 0.000 0.136 0.455 0. 455 0.318 0.273 0.045 0.000 0.000 1.683 NNW 0.000 0.091 0.591 0.682 1.046 0.773 0.000 0.000 0.000 3.185 SUBTOTAL 0.000 1.137 11.419 10.965 6.005 3. 958 0.136 0.000 33.621 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2198 TOTAL HOURS OF STABILITY CLASS D 739 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 739 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2198 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2009/02/26 MEAN WIND SPEED = 4.52 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-26

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<= 1.5 C/100 M)

Sequoyah Nuclear Plant OCT 1, 2008 - DEC 31, 2008 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 0.364 3.594 1.365 0.500 0.000 0.000 0.000 0.000 5.823 NNE 0.000 0.364 3.458 1.183 0.091 0.000 0.000 0.000 0.000 5.096 NE 0.000 0.136 0.637 0.091 0.000 0.000 0.000 0.000 0.000 0.864 ENE 0.000 0.091 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.227 E 0.000 0.045 0.091 0.091 0.045 0.000 0.000 0.000 0.000 0.273 ESE 0.000 0.045 0.045 0.000 0 . 000 0.000 0.000 0.000 0.000 0.091 SE 0.000 0.000 0.273 0.000 0.000 0.000 0.000 0.000 0.000 0.273 SSE 0.000 0.136 0.227 0.045 0.045 0.000 0.000 0.000 0.000 0.455 S 0.000 0.136 0.910 0.273 0.728 .-0.409 0.000 0.000 0.000 2.457 SSW 0.000 0.364 2.229 0.955 0.546 0.045 0.000 0.000 0.000 4.140 SW 0.000 0.318 2. 639 2.229 0.409 0.045 0.000 0.000 0.000 5.641 WSW 0.000 0.227 1.410 0.728 0.091 0.000 0.000 0.000 0.000 2.457 W 0.000 0.227 0.500 0.364 0.045 0.000 0.000 0.000 0.000 1.137 WNW 0.000 0.182 0.500 0.364 0.045 0.045 0.000 0.000 0.000 1..137 NW 0.000 0.091 0.819 0.637 0.227 0.045 0.000 0.000 0.000 1.820 NNW 0.000 0.182 1.137 0.591 0.182 0.091 0.000 0.000 0.000 2.184 SUBTOTAL 0.000 2.912 18.608 8.917 2.957 0. 682 0.000 0.000 0.000 34.076 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2198 TOTAL HOURS OF STABILITY CLASS E 749 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 749 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2198 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99. METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2009/02/26 MEAN WIND SPEED = 3.24 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS AI-27

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1..5< DELTA T<= 4.0 C/100 M)

Sequoyah Nuclear Plant OCT 1, 2008 - DEC 31, 2008 WIND IWIND 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 0.455 2.730 0.227 0.000 0.000 0.000 0.000 0.000 3.412 NNE 0.000 0. 682 4 .049 0. 136 0.000 0.000 0.000 0.000 0.000 4.868 NE 0.000 0 .591 0.364 0.000 0.000 0.000 .0.000 0.000 0.000 0.955 ENE 0 .000 0. 136 0.091 0. 000 0.000 0.000 0.000 0.000 0.000 0.227 E 0.000 b.091 0. 182 0.000 0.000 0.000 0.000 0.000 0.000 0.273 ESE 0.000 0 .045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.045 SE 0.000 0.091 0.045 0.000 0.000 0.000 0.000 0. 000 0.000 0.136 SSE 0.000 0.409 0.182 0.000 0.000 0.000 0.000 0. 000 0.000 0.591 S 0.000 0.318 0.318 0.091 0.000 0.000 0.000 0.000 0.000 0.728 SSW 0.000 0. 182 0.773 0.000 0.000 0.000 0.000 0.000 0.000 0.955 SW 0.000 0 .318 0.728 0.000 0.000 0.000 0.000 0.000 0.000 1.046 WSW 0.000 0 .091 0.273 0. 182 0.000 0.000 0.000 0.000 0.000 0.546 W 0.000 0 .000 0 .227 0. 091 0.000 0.000 0.000 0.000 0.000 0.318 WNW 0 .000 0. 136 0.182 0. 091 0.000 0.000 0.000 0.000 0.000 0.409 NW 0.000 0 .045 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.136 NNW 0.000 0. 182 0. 637 0. 136 0.000 0.000 0.000 0.000 0.000 0.955 SUBTOTAL 0.000 3.776 10.874 0.955 0.000 0.000 0.000 0.000 0.000 15.605 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2198 TOTAL HOURS OF STABILITY CLASS F 343 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 343 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2198 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METERLEVEL DATE PRINTED: 2009/02/26 MEAN WIND SPEED = 2.03 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-28

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

Sequoyah Nuclear Plant OCT 1, 2008 - DEC 31, 2008 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 0.00.0 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 NNE 0.000 0.045 0.591 0.000 0.000 0.000 0.000 0.000 0.000 0.637 NE 0.000 0.000 0.273 0.000 0.000 0.000 0.000 0.000 0.000 0.273 ENE 0.000 0.227 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.273 E 0.000 0.091 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.136 ESE 0.000 0.091 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.182 SE 0.000 0.182 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.273 SSE 0.000 0.136 0.091 0.000 0.000 0.,000 0.000 0.000 0.000 0.227 S

0.ooo0'* 0.227 0.182 0.000 0.000 0.000 0.000 0.000 0.409 0.000 SSW 0.000 0.000 0.318 0.000' 0.000 0.000 0.000 0.000 0.000 0.318 SW 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.00b 0.000 0.045 WSW 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.091 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 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.045 0.000 0.000 0.000 0oo000 0.000 0.000 0.045 SUBTOTAL 0.000 1.001 2.002 0.000 0.000 0.000 0.'000 0.000 0.000 3.003 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2198 TOTAL HOURS OF STABILITY CLASS G 66 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 66 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2198 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2009/02/26 MEAN WIND SPEED = 1.69 NOTE: TOTALS AND.SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS AT-29

Attachment 2.0 Deviations from ODCM Controls/Surveillance Requirements Date ODCM Description of Deviation Requirement March 13, 2008 1/2 2.2 A tritium sample collected for U2 containment purge was Table 2.2-2 discarded prior to completation of analysis. A second sample Item B. 1 was collected during the purge and analyzed for closure of the permit. PER 140176 March 20, 2008 1/2 2.2 Samples were collected and analyzed prior to U2 purge. The Table 2.2-2 Noble gas was collected in a one liter gas marnelli. It analyzed Item B. 1 using thewrong sample geometry. The error was caught and corrected on closure of the permit. PER 141139 A2-1

Attachment 3.0 Radiation Monitors Inoperable for Greater than 30 days No monitors inoperable greater than 30 days.

A3-1

ML091260462

Text

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