Text

Enclosure 1, Annual Radioactive Effluent Release Report Sequoyah Nuclear Plant 2005
	ML061250275
Person / Time
Site:	Sequoyah
Issue date:	04/27/2006
From:	; Tennessee Valley Authority
To:	; Office of Nuclear Reactor Regulation
References
	Download: ML061250275 (68)
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ENCLOSURE 1 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT SEQUOYAH NUCLEAR PLANT 2005

SUPPLEMENTAL INFORMATION REGULATORY LIMITS A Gaseous Effluents

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

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

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

b. Iodine-131, Iodine-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 lodine-1 31, lodine-1 33, 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 to 7.5 mrem to any organ during any calendar quarter.

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

B. Liquid Effluents

1. The 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, Part 20 E1-1

SUPPLEMENTAL INFORMATION (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 (gCi/ml) total activity.

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

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

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

11. 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 piCi/ml is applied. This ECL is based on the 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 boundary:

- 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.

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SUPPLEMENTAL INFORMATION 111. AVERAGE ENERGY Sequoyah's ODCM limits the dose equivalent rates due to the release of noble gases to less than or equal to 500 mrem/year to the total body and less than or equal to 3000 mrem/year to the skin. 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 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 "0.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.

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.

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SUPPLEMENTAL INFORMATION 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 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 continuous release 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.

V. BATCH Value 1st 2nd Half Half Units A. Liquid (Radwaste only)

1. Number of releases 103 47 Each

2. Total time period of releases 17357 7180 Minutes

3. Maximum time period of release 512 315 Minutes

4. Average time period of releases 168.51 152.77 Minutes

5. Minimum time period for release 25.0 40 Minutes

6. Average dilution stream flow during 32844.5 28976.5 CFS release periods E1-4

SUPPLEMENTAL INFORMATION B. Gaseous (Batches only, containment purges, containment vents, and waste decay tanks)

1. Number of releases 130 77 Each

2. Total time period of releases 43119 26981 Minutes

3. Maximum time period for release 5150 1205 Minutes

4. Average time period for releases 331.69 350.40 Minutes

5. Minimum time period for release 45.0 30.0 Minutes VI. A13NORMAL RELEASES Value 1st 2nd Half Half Units A. Liquid Number of Releases 0 0 Total Activity Released 0.OOE-01 0.OOE-01 Ci B. Gaseous Number of Releases 0 0 Total Activity Released 0.OOE-01 0.OOE-01 Ci E1-5

LIQUID EFFLUENTS - SUMMATION OF ALL RELEASES A. Fission and 1st 2nd 3rd 4th Activation Products Unit Qtr Qtr Qtr Qtr %Error

1. Total Released Curies 4.95E-02 1.97E-01 1.99E-02 2.20E-02 18%

2. Average diluted concentration pCi/ml 2.95E-08 1.38E-07 1.16E-08 1.29E-08 during period

3. Percent of * *

Applicable Limit B. Tritium

1. Total Released Curies 4.47E+02 7.40E+02 3.85E+01 2.55E+02 18%

2. Average diluted concentration p.Ci/ml 2.67E-04 5.17E-04 2.25E-05 1.50E-04 during period

3. Percent of *

Applicable Limit C. Dissolved and Entrained Gases

1. Total Released Curies 5.77E-03 6.28E-01 6.31 E-03 5.91 E-02 39%

2. Average diluted concentration Ci/ml 3.44E-09 4.39E-07 3.69E-09 3.47E-08 during period

3. Percent of % 1.72E-03 2.20E-01 1.85E-03 1.74E-02 Applicable Limit D. Gross Alpha

1. Total Released Curies O.OOE-01 O.OOE-01 O.OOE-01 O.OOE-01 E. Volume of Waste Released Liters 5.74E+07 4.11 E+07 5.06E+07 5.27E+07 4%

F. Volume of Dilution 1.62E+09 1.39E+09 1.66E+09 1.65E+09 Water for Period Liters 4%

Applicable limits are expressed in terms of dose. See Tables 1 thru 4.

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LIQUID EFFLUENTS - TOTAL PLANT DISCHARGE G. Nucelide Summary (Note: Refer to Table A for ODCM nuclides reported as 0.OOE-01)

Required by ODCM/Others Fission and Activation Products Continuous Mode Batch Mode Quarter Quarter Quarter Quarter NuclidE Unit s 2 na ist 2 nd

1. Silver-110M Ci 0.00E-01 0.00E-01 1.01E-03 3.15E-03

2. Cerium-144 Ci 0.OOE-01 0.OOE-01 3.19E-05 0.00E-01

3. Cabalt-57 Ci 0.OOE-01 0.00E-01 3.37E-04 5.34E-04

4. Ccbalt-58 C 0.00E-01 0.00E-01 3.10E-02 1.OOE-01

5. Ccbalt-60 Ci 0.00E-01 0.00E-01 5.92E-03 1.18E-02

6. Chromium-51 Ci 0.00E-01 0.00E-01 3.61 E-04 8.84E-03

7. Cesium-134 Ci 0.OOE-01 0.00E-01 2.82E-04 0.00E-01

8. Cesium-1 37 Ci 0.00E-01 0.00E-01 7.74E-04 2.43E-05

9. Cesium-138 Ci 0.00E-01 0.00E-01 0.00E-01 2.17E-05

10. Ircn-55 Ci 0.00E-01 0.00E-01 7.29E-03 2.88E-02

11. Ircin-59 Ci 0.00E-01 0.00E-01 3.46E-04 2.18E-03

12. lodine-131 Ci 0.00E-01 0.00E-01 1.07E-03 1.98E-04

13. loiine-133 .Ci 0.00E-01 0.00E-01 0.00E-01 2.33E-05

14. lodine-134 Ci 0.00E-01 0.00E-01 0.00E-01 6.17E-05

15. Manganese-54 Ci 0.00E-01 0.00E-01 1.22E-04 1.22E-03

16. Sodium-24 Ci 0.00E-01 0.00E-01 0.00E-01 7.84E-07

17. Niobium-95 Ci 0.00E-01 0.00E-01 1.18E-04 2.03E-03

18. Antimony-124 0.00E-01 0.00E-01 0.00E-01 4.05E-03

19. Antimony-125 Ci 0.00E-01 0.00E-01 7.98E-04 3.33E-02

20. Slrontium-91 Ci 0.00E-01 0.00E-01 9.92E-06 0.00E-01

21. Technetium-99M Ci 0.00E-01 0.00E-01 3.99E-06 0.00E-01

22. Tellurium-132 Ci 0.00E-01 0.00E-01 0.OOE-01 8.95E-06

23. Zinc-65 Ci 0.00E-01 0.OOE-01 0.OOE-01 1.13E-04

24. Zirconium-95 Ci 0.00E-01 0.00E-01 0.00E-01 8.32E-04 Total f Dr Period Cl 0.00E-01 0.00E-01 4.95E-02 1.97E-01 E1-7

LIQUID EFFLUENTS - TOTAL PLANT DISCHARGE G. Nuclide Summary (Note: Refer to Table A for ODCM nuclides reported as O.OOE-01)

Required by ODCM/Others Continuous Mode Batch Mode Quarter Quarter Quarter Quarter Nuclide Unit 1' 2fd 1 st 2nd Tritium H-3 Ci 1.60E-01 9.69E-02 4.47E+02 7.40E+02 Dissolved and Entrained Noble Gases

1. Argon-41 Ci O.OOE-01 O.OOE-01 2.93E-04 7.51 E-04

2. Krypton-85M Ci 0.OE-01 0.OOE-01 7.77E-08 2.09E-05

3. Xenon-131 M Ci O.OOE-01 O.OOE-01 O.OOE-01 1.05E-02

4. Xenon-133 Ci O.OOE-01 O.OOE-01 5.47E-03 6.12E-01

5. Xenon-133M Ci O.OOE-01 O.OOE-01 O.OOE-01 3.51E-03

6. Xenon-135 Ci O.OOE-01 O.OOE-01 O.OOE-01 1.03E-03 Total for Period Ci O.OOE-01 0.00E-01 5.77E-03 6.28E-01 E1-8

LIQUID EFFLUENTS - TOTAL PLANT DISCHARGE G. Nuclide Summary (Note: Refer to Table A for ODCM nuclides reported as O.OE-01)

Required by ODCM/Others Fission and Activation Products Continuous Mode Batch Mode Quarter Quarter Quarter Quarter Nuclide Unit 3rd 4 th 3 rd 4

1. Silver-110M Ci 0.OOE-01 0.OOE-01 7.67E-04 4.77E-04

2. Cobalt-57 Ci 0.OOE-01 0.OOE-01 1.02E-04 1.19E-04

3. Cooalt-58 Ci 0.OOE-01 0.OOE-01 1.08E-02 7.36E-03

4. Cobalt-60 Ci 0.OOE-01 0.OOE-01 1.66E-03 2.86E-03

5. Chromium-51 Ci 0.OOE-01 0.OOE-01 5.96E-05 8.35E-05

6. Cesium-134 Ci 0.OOE-01 0.OOE-01 0.OOE-01 7.62E-05

7. Cesium-137 Ci 0.OOE-01 0.OOE-01 0.OOE-01 4.03E-04

8. Iroi-55 Ci 0.OOE-01 0.OOE-01 2.26E-03 3.60E-03

9. Irori-59 Ci 0.OOE-01 0.OOE-01 6.26E-06 0.OOE-01

10. Iocline-131 Ci 0.OOE-01 0.OOE-01 9.03E-06 0.OOE-01

11. Manganese-54 Ci 0.OOE-01 0.OOE-01 6.29E-05 1.32E-04

12. Sodium-24 Ci O.OOE-01 0.OOE-01 0.OOE-01 1.31 E-06

13. Niobium-95 Ci 0.OE-01 0.00E-01 3.56E-05 5.30E-05

14. Antimony-124 Ci 0.0OE-01 O.OOE-01 2.52E-04 2.48E-04

15. Antimony-125 Ci 0.OOE-01 0.OOE-01 3.86E-03 6.45E-03

16. Zinc-65 Ci 0.OOE-01 0.OOE-01 1.04E-04 1.10E-04

17. Zirconium-95 Ci 0.OOE-01 0.OOE-01 8.77E-06 0.OOE-01 Total for Period Ci O.OOE-01 O.OOE-01 1.99E-02 2.20E-02 E1-9

LIQUID EFFLUENTS - TOTAL PLANT DISCHARGE G. Nuclide Summary (Note: Refer to Table A for ODCM nuclides reported as 0.00E-01)

Required by ODCM/Others Continuous Mode Batch Mode Quarter Quarter Quarter Quarter Nuclide Unit 3_td 4th 3__ 4 th H-3 Ci 1.40E-01 2.08E-01 3.84E+01 2.55E+02 Dissolved and Entrained Noble Gases

1. Kr-85 Ci O.OOE-01 O.OOE-01 O.OOE-01 1.83E-03

2. Xe-131M Ci 0.00E-01 O.OOE-01 0.OOE-01 1.50E-03

3. Xenon-133 Ci O.OOE-01 O.OOE-01 6.30E-03 5.57E-02

4. Xenon-133M Ci O.OOE-01 O.OOE-01 O.OOE-01 5.33E-05

5. Xenon-135 Ci O.OOE-01 O.OOE-01 5.97E-06 1.15E-05 Total for Period Ci O.OOE-01 O.OOE-01 6.31E-03 5.91E-02 EI-10

TABLE A LIQUID "TYPICAL LLD" EVALUATION( 1 )

ot(2)

Nuclide ODCM LLD 1 hr 8 hr 32 hr Manganese-54 5.OE-07 3.36E-08 3.36E-08 3.37E-08 Cobalt-58 5.0E-07 2.53E-08 2.54E-08 2.56E-08 Iron-59 5.0E-07 5.26E-08 5.29E-08 5.37E-08 Cobalt-50 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 5.0E-07 1.91 E-08 1.91 E-08 11.92E-08 Cesium-137 5.OE-07 3.87E-08 3.87E-08 3.87E-08 Cerium-141 5.OE-07 2.80E-08 2.81E-08 22.87E-08 Cerium-144 5.OE-06 1.11E-07 1.12E-07 1.12E-07 Iodine- 131 1.OE-06 2.28E-08 2.34E-08 22.55E-08 Krypton-87 1.OE-05 1.16E-07 5.25E-07 (:3)

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

Xenon-133 1.0E-05 4.19E-08 4.36E-08 44.98E-08 Xenon-133m 1.OE-05 1.42E-07 1.55E-07 22.132-07 Xenon-135 1.0E-05 2.06E-08 3.50E-08 22.17E-07 Xenon-1 38 1.OE-05 8.37E-06 (3) 3)

Nuclide ODCM LLD TVPi cal LLD Tritium 1.OE-05 1.2EE-06 Gross Alpha 1.0E-07 2.OE E-08 Strontium-89/90 5.OE-08 3.8EE-08/1.4E-08 Iron-55 1.OE-06 1.3EE-08 NOTES,: (1) LLD values are in AtCi/ml.

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

(3) T 'A too short.

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GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES (GROUND LEVEL RELEASES)

Summation of All 1 St 3 rd 4 th 2

Releases Unit Qtr Qtr Qtr Qtr %Error A. Noble Gases

1. Total Released Ci 9.03E+00 6.76E+00 5.41 E+00 7.77E+01 11%

2. Average Release Rate of Period p.Ci/sec 1.16E+01 8.60E-01 6.80E-01 9.77E+01

3. Percent of Limit B. lodines

1. Total lodine-131 Ci 6.53.E-05 8.03E-05 9.46E-06 O.OOE-01 13%

2. /verage Release Rate for Period pCi/sec 8.40E-06 1.02E-05 1.19E-06 O.OOE-01

3. Percent of Limit C. Particulates

1. Particulates with half-lives >8 days Ci O.OOE-01 8.55E-06 O.OOE-01 O.OOE-01 16%

2. Average Release Rate for Period pCi/sec O.OOE-01 1.09E-06 O.OOE-01 O.OOE-01

3. Percent of Limit

4. Gross Alpha Ci O.OOE-01 O.OOE-01 O.OOE-01 O.OOE-01 Radio-activity D. Tritium

1. lotal Release Ci 1.92E+01 2.65E+01 1.15+01 1.21 E+01 15%

2. Average Release Rate for Period pCi/sec 2.48E-01 3.37E+00 1.45E+00 1.52E+00

3. Percent of Limit

Applicable limits are expressed in terms of dose. See Tables 5 thru 8.

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GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES (GROUND LEVEL RELEASES)

1. Noble Gases Required by ODCM/Others Continuous Mode Batch Mode Quarter Quarter Quarter Quarter Nuclide Unit 1st 2nd 1st 2nd

1. Krnpton-85M Ci O.OOE-01 O.OOE-01 8.76E-05 O.OOE-01

2. Kripton-88 Ci O.OOE-01 O.OOE-01 O.OOE-01 7.10E-04

3. Xenon-133M Ci 0.OOE-01 O.OOE-01 1.97E-02 1.44E-02

4. Xenon-135 Ci 0.OOE-01 O.OOE-01 1.15E-01 5.83E-02

5. Krnpton-85 Ci O.OOE-01 O.OOE-01 2.12E-01 1.07E-01

6. Xenon-131M Ci O.OOE-01 O.OOE-01 5.57E-02 1.46E-01

7. Argon-41 Ci O.OOE-01 O.OOE-01 4.15E+00 1.77E+00

8. Xenon-133 Ci O.OE-01 0.OOE-01 4.48E+00 4.66E+00 Total for Period Ci O.OOE-01 O.OOE-01 9.03E+00 6.76E+00

2. loclines lodine-133 Ci 1.60E-04 7.86E-05 O.OOE-01 O.OOE-01 locline-131 Ci 6.53E-05 8.03E-05 O.OOE-01 O.OOE-01 Total for Period Ci 2.25E-04 1.59E-04 O.OOE-01 O.OOE-01

3. Particulates

1. Bromine-82 Ci O.OOE-01 4.97E-06 O.OOE-01 O.OOE-01

2. Cobalt-58 O.OOE-01 8.55E-06 O.OOE-01 O.OQE-01 Total for Period Ci O.OOE-01 1.35E-05 O.OOE-01 O.OOE-01

4. Tritium Ci 1.60E+01 2.58E+01 3.23E+00 6.52E-01 Total for Period Ci 1.60E+01 2.58E+01 3.23E+00 6.52E-01 NOTE: Refer to Table B for ODCM nuclides reported as O.OOE-01.

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GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES (GROUND LEVEL RELEASES)

1. No'rIe Gases Required by OCCM/Others Continuous Mode Batch Mode Quarter Quarter Quarter Quarter Nuclide Unit 3rd 4th 3rd 4th

1. Krypton-87 Ci O.OOE-01 O.OOE-01 1.32E-03 O.OOE-01

2. Krypton-88 Ci O.OOE-01 O.OE-01 O.OOE-01 5.42E-04

3. Krypton-85M Ci O.OOE-01 O.OOE-01 O.OOE-01 9.69E-04

4. Xenon-133M Ci O.OOE-01 O.OOE-01 3.18E-02 1.84E-02

5. Xe ion-135 Ci O.OOE-01 O.OOE-01 6.52E-02 3.50E-02

6. Xeion-131M Ci O.OOE-01 O.OOE-01 1.41 E-0I 1.1OE-01

7. Aroon-41 Ci O.OOE-01 O.OOE-01 1.31E+00 3.31 E-01

8. Krvpton-85 Ci O.OOE-01 O.OOE-01 3.69E-01 4.76E-01

9. Xenon-133 Ci O.OOE-01 7.33E+01 3.49E+00 3.37E+00 Total for Period Ci O.OOE-01 7.33E-F01 5.41 E+00 4.34E+00

2. lodines

1. locline-131 Ci 9.46E-06 O.OOE-01 O.OOE-01 O.OOE-01 Total for Period Ci 9.46E-06 O.OOE-01 O.OOE-01 O.OOE-01

3. Particulates Ci Tctal for Period O.OOE-01 O.OOE-01 O.OOE-01 .O.OOE-01 Ci

4. Tritium Ci 1.07E+01 1.17E+01 8.19E-0I 3.66E-01 Total f'or Period Ci 1.07E+01 1.17E+01 8.19E-01 3.66E-01 NOTE: Refer to Table B for ODCM nuclides reported as O.OOE-01.

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TABLE B GASEOUS "TYPICAL" LLD EVALUATION(')

Noble Gas ot(2)

Nuclide ODCM LLD 1 hr 1.5 hr Krypton.87 1.0E-04 2.08E-06 2.73E-06 Krypton.88 1.OE-04 1.61E-06 1.81E-06 Xenon-133 1.0E-04 6.61 E-07 6.63E-07 Xenon-1 33m 1.OE-04 2.34E-06 2.35E-06 Xenon-1 35 1.OE-04 3.43E-07 3.56E-07 Xenon-138 1.OE-04 1.40E-04 6.10E-04 Particul.te Sarn2e(3) 1 hr 24 hr 7.0 da Manganese-54 1.OE-10 7.47E-12 3.12E-13 4.48E-14 Cobalt-58 1.0E-10 5.62E-12 2.35E-13 3.46E-14 Iron-59 1.0E-10 1.20E-11 5.02E-13 7.49E-14 Cobalt-iSO 1.OE-10 1.07E-11 4.46E-13 6.38E-14 Zinc-65 1.0E-10 6.71E-12 2.80E-13 4.03E-14 Molybdenum-99 1.0E-10 3.43E-11 1.61E-12 4.70E-13 Cesium-134 1.0E-10 4.25E-12 1.77E-13 2.54E-14 Cesium-137 1.OE-10 8.48E-12 3.54E-13 5.05E-14 Cerium-*141 1.OE-10 5.10E-12 2.15E-13 3.26E-14 Cerium-144 1.0E-10 2.01E-11 8.33E-13 1.20E-13 Iodine-' 31 1.OE-10 4.76E-12 2.07E-13 3.77E-14 Charcoal Sample lodine-'i31 1.OE-11 7.25E-12 3.15E-13 5.74E-14 (1) LLD values are in ,uCi/ml.

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

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

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TABLE B GASEOUS "TYPICAL" LLD EVALUATION"1 )

NuclidE 0DCM LLD Typical LLD Tritium 1.OE-06 1.OE-11 Gross Alpha 1.OE-11 1.5E-14 StrontiLlm-89 1.OE-11 1.OE-14 Strontium-90 1.QE-11 1.OE-15 NOTE': (1) LLD values are in pCi/cc.

(2) ot for noble gases is the time from sampling to analysis.

[t for charcoal and particulate samples is the midpoint of sampling to analysis.

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SOLID WASTE (RADIOACTIVE SHIPMENTS)

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

1. Tvre of Waste Unit Period Error %

a. Spent Resins, Filter Sludges, Evaporator m3 6.81E+00 +1.OOE-02 B3ottoms, etc. Ci 2.20E+02 +5.00E+00

b. Dry Active Waste, Compressible Waste m3 2.87E+01 +1.00E-01 Contaminated Equipment, etc. Ci 1.67E+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 +1.00E-02 Ci 4.13E+01 +1.OOE+00

2. Estirate of Maior Nuclide Composition (by tvpe of waste)

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

Curies Percent

1. Hydrogen-3 4.87E-02 0.02

2. Carbon-14 7.18E-01 0.33

3. Manganese-54 2.89E+00 1.32

4. Iron-55 2.47E+01 11.25

5. Cobalt-57 7.12E-01 0.32

6. Cobalt-58 3.30E+00 1.50

7. Nickel-59 1.47E+00 0.67

8. Cobalt-60 4.75E+01 21.63

9. Nickel-63 1.17E+02 53.38

10. Zinc-65 1.87E-01 0.09

11. Strontium-89 1.12E-03 0.00

12. Strontium-90 4.54E-02 0.02

13. Silver-108m 4.22E-02 0.02 1Z Silver-110m 2.01E+00 0.91

15. Antimony-125 1.02E+00 0.47

16. Cesium-134 3.86E+00 1.76 1;'. Cesium-137 1.38E+01 6.29

18. Cerium-144 5.51 E-03 0.00

19. Plutonium-238 8.53E-04 0.00

20. Plutonium-239/240 3.92E-04 0.00

21. Plutonium-241 2.59E-02 0.01

22. Americium-241 4.06E-04 0.00

23. Curium-242 1.17E-04 0.00

24. Curium-243/244 2.70E-03 0.00 El-17

SOLID WASTE (RADIOACTIVE SHIPMENTS)

2. Estimate of Maior Nuclide Composition (by tVpe of waste) (Cont.)

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

Curies Percent

1. Carbon-14 7.52E-04 0.05

2. Chromium-51 3.13E-02 1.87

3. Manganese-54 2.01 E-02 1.20

4. Iron-55 4.29E-01 25.70

5. Cobalt-57 5.78E-04 0.04

6. Cobalt-58 1.69E-01 10.09

7. Iron-59 2.13E-03 0.13

8. Cobalt-60 8.05E-01 48.20

9. Nickel-63 7.34E-02 4.39

10. Zinc-65 3.61E-04 0.02

11. Zirconium-95 4.73E-02 2.83

12. Niobium-95 7.18E-02 4.30

13. Silver-11Om 1.56E-03 0.09

14. Tin-113 1.86E-03 0.11

15. Antimony-125 4.88E-03 0.29

16. Cesium-134 3.33E-04 0.02

17. Cesium-137 7.32E-03 0.44

18. Cerium-144 7.14E-04 0.04

19. Plutonium-238 4.90E-05 0.00

20. Plutonium-239/240 6.44E-05 0.00

21. Plutonium-241 3.00E-03 0.18

22. Americium-241 6.02E-05 0.00

23. Plutonium-243/244 8.41 E-05 0.01

c. Irradiated Components Curies Percent None N/A N/A E1-18

2. Estimate of Maior Nuclide Composition (bv tvye of waste) (Cont.)

d. Other: Mechanical Filters Curies Peroent

1. Hydrogen-3 1.97E-02 0.05

2. Carbon-14 7.46E-01 1.81

3. Chromium-51 5.62E-06 0.00

4. Manganese-54 1.95E-01 0.47

5. Iron-55 1.97E+01 47.67

6. Cobalt-57 2.98E-02 0.07

7. Cobalt-58 5.25E-01 1.27

8. Iron-59 1.37E-03 0.00

9. Nickel-59 1.01 E-02 0.02

10. Cobalt-60 2.20E+00 5.32

11. Nickel-63 1.38E+00 3.34

12. Zinc-65 2.25E-02 0.05

13. Strontium-89 1.25E-05 0.00

14. Zirconium-95 8.62E-03 0.02

15. Niobium-95 1.12E-02 0.03

16. Technetium-99 1.20E-03 0.00

17. Ruthenium-103 6.52E-07 0.00

18. Silver-110m 1.23E-01 0.30

19. Tin-113 5.66E-03 0.01

20. Iodine-131 1.50E-19 0.00

21. Antimony-124 3.64E-05 0.00

22. Antimony-125 2.49E-02 0.06

23. Cesium-134 5.11E+00 12.313

24. Cesium-136 3.56E-13 0.00

25. Cesium-137 1.12E+01 27.10

26. Barium/Lanthanum-140 1.80E-13 0.00 2?. Cerium-144 8.96E-03 0.02

28. Plutonium-241 3.52E-03 0.01

29. Curium-242 9.44E-05 0.00

30. Curium-243/244 1.70E-04 0.00 El-19

SOLID WASTE (RADIOACTIVE SHIPMENTS)

3. Solid Waste Disposition

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

Number of Shipments [ Type Quantity Mode of Transportation Destination 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 37* A-LSA Motor Freight Envirocare near Clive, Utah I I A-LSA Motor Freight Chem-Nuclear Barnwell, SC

37 of the shipments were shipped by a waste processor.

c. Irradiated components, control rods, etc.

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

d. Other: Mechanical Filters and Tank Residue ber of Shipments l Type Quantity l Mode of Transportation l Destination Z I B-LSA 11 Motor Freight Chem-Nuclear Barnwell, SC

4. Irradiated Fuel Shipments (Disposition) lNumbei of Shipments I Type Quantity l Mode of Transportation l Destination

None N/A N/A N/A

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

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Independent Spent Storage Installation SQN implemented use of an independent spent storage installation (ISFSI) on July13, 2004.

The ISESl 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 fu l storage canister."

The EPA 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 SQ1 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.

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ENCLOSURE 2 RADIOLOGICAL IMPACT ASSESSMENT REPORT SEQUOYAH NUCLEAR PLANT JANUARY - DECEMBER 2005

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 (perreactor 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 limit for doses to a member of the general public from radioactive material in liquid effluents released to unrestricted areas is:

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 EPA 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.

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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 tie 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.

Airbome 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.

Meteorological Data 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 distribution of noncalm wind directions less than 0.7 m/s (1.5 mph). Stability classes are determined frorn 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.

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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 L)ose 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 through 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 calculat on 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 471.0.

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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 (East Side 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 through 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.

POPULNTION 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 doses are calculated using actual recreational data on the number of shoreline visits at downstream locations.

Population dose estimates for airborne and liquid effluents are presented in Tables 1 through 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 15.25 mR/quarter at onsite (at or near the site boundary) stations and approximately 14.00 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 E24

undetermined influences. Fluctuations in natural background dose rates and in TLD readings tend to mask any small increments which may be due to plant operations. Thus, there was no identifiable increase in dose rate levels attributable to direct radiation from plant equipment and/or gaseous effluents.

DOSE TO A MEMBER OF THE PUBLIC INSIDE THE UNRESTRICTED AREA BOUNDARY As stated in the SQN Offsite Dose Calculation Manual, an evaluation of the dose to a member of the piblic 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 250 mrem. Using this value, and subtracting an annual background value of 62 mrem/year, and multiplying by the ratio of the occupancy times, the external dose was 42.92 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 GFR 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.

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Table 1 Doses from Airborne Effluents First Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distarnce External Gamma Air 5.38E-03 mrad 5 mrad <1 N/950 Beta Air 2.63E-03 mrad 10 mrad <1 N/950 Submersion Total Body 3.23E-03 mrad 10 mrad <1 SSW/2134 Skin 4.93E-03 mrad 10 mrad <1 SSW/2134 Organ Doses Child/Thyroid 9.75E-03 mrem 7.5 mrem <1 N/1 829 Child/Total Body 9.36E-03 mrem 7.5 mrem <1 N/1829 Population Doses Total Body Dose 2.67E-02 man-rem Maximum Organ Dose (organ) 2.79E-02 man-rem (thyroid)

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

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Table 2 Doses from Airborne Effluents Second Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distance External X X__

Gamma Air 4.30E-03 mrad 5 mrad <1 NW/660 Beta Air 2.80E-03 mrad 10 mrad <1 NW/660 Submersion Total Body 2.70E-03 mrad 10 mrad <1 NNW/841 Skin 4.25E-03 mrad 10 mrad <1 NNW/841 Organ Doses Child/Thyroid 1.61E-02 mrem 7.5 mrem <1 S/2093 Child/Total Body 1.55E-02 mrem 7.5 mrem <1 S/2093 Population Doses Total Body Dose 4.26E-02 man-rem Maximum Organ Dose (organ) 4.41E-02 man-rem (thyroid)

Populat ion doses can be compared to the natural background dose for the entire 50-mile population of about 95,400 man-rem/year (based on 90 mrem/yr for natural background).

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Table 3 Doses from Airborne Effluents Third Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distance External Garnma Air 2.18E-03 mrad 5 mrad <1 S/f1570 Beta Air 1.57E-03 mrad 10 mrad <1 S/1570 Submersion Total Body 1.65E-03 mrad 10 mrad <1 S/1786 Skin 2.68E-03 mrad 10 mrad <1 S/1786 Organ Doses Child/Thyroid 1.08E-02 mrem 7.5 mrem <1 S/2093 Child/Total Body 1.06E-02 mrem 7.5 mrem <1 S/2093 Population Doses Total Body Dose 1.5' 3E-02 man-rem Maximum Organ Dose (organ) 1.55E-02 man-rem (thyroid)

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

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Table 4 Doses from Airborne Effluents Fourth Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distance External _

Gamma Air 4.91 E-03 mrad 5 mrad <1 SSW/1 840 Beta Air 1.36E-02 mrad 10 mrad <1 SSW/1 840 Submersion . .

Total Body 3.34E-03 mrad 10 mrad <1 SSW/2134 Skin 7.74E-03 mrad 10 mrad <1 SSW/2134 Organ Doses Child/Thyroid 1.01 E-02 mrem 7.5 mrem <1 S/2093 Child/Total Body 1.01 E-02 mrem 7.5 mrem <1 S/2093 Population Doses Total Body Dose 2.01E-02 man-rem Maximum Organ Dose (organ) 2.01 E-02 man-rem (thyroid, liver, bone, GI, lung, kidney)

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

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Table 5 Doses from Liquid Effluents First Quarter Individual Doses (mrem)

Quarterly. Percent of

-Age Group Organ Dose Limit Limit Child Total 1.50E-03 1.5 mrem <1 %

Body, Child Liver 1.70E-03 5 mrem <1 %

Child Thyroid 1.60E-03 5 mrem <I %

Average Riverflow past SQN (cubic feet per second): 40,477 Pcpulation Doses Total Body Dose 1.20E-01 man-rem Maximum Organ Dose (organ) 1.20E-01 man-rem (Bone, GIT, Thyroid, Liver, Kidney, Lung))

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

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Table 6 Doses from Liquid Effluents Second Quarter Individual Doses (mrem)

Quarterly Percent Age Group Organ Dose Limit of Limit Child Total Body 4.20E-03 1.5 mrem <1 %

Adult GIT 5.5E-03 5 mrem <1 %

Child Thyroid 4.20E-03 5 mrem <.1 %

I .

Average Riverflow past SQN (cubic feet per second): 25,212 Population Doses Total Body Dose 3.50E-01 man-rem Maximum Organ Dose (organ) 3.60E-01 man-rem (GIT)

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

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Table 7 Doses from Liquid Effluents Third Quarter Individual Doses (mrem)

Age Quarterly Percent of Group Organ Dose Limit Limit Child Total Body 2.10E-04 1.5 mrem <1%

Adult GIT 2.30E-04 5 mrem <1 %

Child Thyroid 2.1 OE-04 5 mrem < 1%

Average Riverflow past SQN (cubic feet per second): 32,643 Population Doses Total Body Dose 1.90E-02 man-rem Maximum Organ Dose (organ) 2.OOE-02 man-rem (GIT)

Population doses can be compared to the natural background dose for the entirel 50-mile population of about 95,400 man-rem/year (based on 90 mrem/yr for natural background).

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Table 8 Doses from Liquid Effluents Fourth Quarter Individual Doses (mrem)

Age Quarterly Percent Group Organ Dose Limit of Limit Child Total Body 1.40E-03 1.5 mrem <1 %

Child Liver 1.50E-03 5 mrem <1%

Child Thyroid I1.30E-03 5 mrem <1 %

I I I Average River flow past SQN (cubic feet per second): 25,310 population Doses rotal Body Dose 1.1C)E-01 man-rem Maximum Organ Dose (organ) 1.1OE-01 man-rem (GIT)

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

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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 3.23E-03 2.70E-03 1.65E-03 3.34E-03 Critical organ dose (air) 2.79E-02 4.41 E-02 1.55E-02 2.01 E-02 Total body dose (liquid) 1.50E-03 4.20E-03 2.10E-04 1.40E-03 Maximum organ dose 1.70E-03 5.50E-03 2.30E-04 1.50E-03 (liquid)

Direct Radiation Dose O.OOE-O0 O.OOE-00 O.OOE-00 O.OOE-O0 =

Total 3.43E-02 5.65E-02 1.76E-02 2.63E-02 =

Cumulative Total Dose (Total body or any other organ) mrem 1.35E.01 Annual Dose Limit (mrem) 25 Percent of Limit 0.54-Thyroid Dose (mrem)

Total body air submersion 3.23E-03 2.70E-03 1.65E-03 3.34E-03 l Thyroid dose (airborne) 9.75E-03 1.61 E-02 1.08E-02 1.01 E-02 Total body dose (liquid) 1.50E-03 4.20E-03 2.1OE-04 1.40E-03 l_ =

Thyroid dose (liquid) 1.60E-03 4.20E-03 2.1OE-04 1.30E-03 =

Direct Radiation Dose O.OOE-00 O.OOE-00 O.OOE-00 O.OOE-00 Total 1.61 E-02 2.72E-02 1.29E-02 1.61 E-02 _

Cumulative Total Dose (Thyroid) mrem 7.23E-02 Annual Dose Limit (mrem) 75 Percent of Limit 0.10 E2-14

Attachment 1.0 Joint Frequency Distribution Tables A2-1

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<--l.9 C/100 M)

Sequoyah Nuclear Plant JAN 1, 2005 - MAR 31, 2005 WIND WIND SPEED(MPH)

DIRECTION CALN 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 0.141 0.188 0.000 0.000 0.000 0.329 NNE 0.000 0.000 0.000 0.141 0.564 0.752 0.000 0.000 0.000 1.457 NE 0.000 0.000 0.000 0.094 0.188 0.141 0.000 0.000 0.000 0.423 ENE 0.000 0.000 0.000 0.188 0.047 0.000 0.000 0.000 0.000 0.235 E 0.000 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.094 ESE 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 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 0.047 0.000 0.000 0.000 0.000 0.047 SSW 0.000 0.000 0.000 0.000 0.376 0.329 0.000 0.000 0.000 0.705 SW 0.000 0.000 0.000 0.000 0.047 0.282 0.000 0.000 0.000 0.329 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 0.188 0.000 0.000 0.000 0.188 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.047 0.000 O .OOC 0.047 NW 0.000 0.000 0.000. 0.000 0.141 0.376 0.094 0.000 0. 00C 0.611 NNW 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 O.OOC 0.047 SUBTOTAL 0.000 0.000 0.000. 0.517 1.598 2.303 0.141 0.000 O.00C 4.558 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2128 TOTAL HOURS OF STABILITY CLASS A 97 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 97 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2128 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABrLITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED:

2005/06/02 MEAN WIND SPEED - 7.78 1 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-2

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, 2005 - MAR 31, 2005 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >-24.5 TOTAL N 0.000 0.000 0.047 0.047 0.141 0.000 0.000 0.000 0.000 0.235 NNE 0.000 0.000 0.000 0.235 0.423 0.329 0.000 0.000 0.000 0.987 NE 0.000 0.000 0.000 0.094 0.047 0.047 0.000 0.000 0.000 0.188 ENE 0.000 0.000 0.094 0.047 0.000 0.000 0.000 0.000 0.000 0.141 E 0.000 0.000 0.000 0.094 0.000 0.000 0.000 0.000 0.000 0.094 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 5 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 0.000 0.047 0.611 0.094 0.000 0.000 0.000 0.752 SW 0.000 0.000 0.000 0.047 0.235 0.094 0.000 0.000 0.000 0.376 WSW 0.000 0.000 0.000 0.000 .0.047 0.094 0.000 0.000 0.000 0.141 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 0.047 0.000 0.000 0.000 0.047 NW 0.000 0.000 0.000 0.000 0.094 0.376 0.047 0.000 0.000 0.517 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.141 0.611 1.598 1.081 0.047 0.000 0.000 3.477 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2128 TOTAL HOURS OF STABILITY CLASS B 74 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 74 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2128 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STAB::LITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED:

2005/06/02 MEAN WIND SPEED - 6.77 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-3

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<--l.5 C/100 M)

Sequoyah Nuclear Plant JAN 1, 2005 - MAR 31, 2005 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 0.0 94 0.094 0.047 0.000 0.000 0.000 0.235 NNE 0.000 0.000 0.047 0.188 0.094 0.376 0.000 0.000 0.000 0.705 NE 0.000 0.000 0.047 0.329 0.047 0.000 0.000 0.000 0.00C 0.423 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.OOC 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.OOC 0.000 ESE 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 O.OOC 0.047 SE 0.000 0.000 0.047 0.141 0.000 0.000 0.000 0.000 O.00c 0.188 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 .00C 0.000 S 0.000 0.000 0.000 0.094 0:141 0.000 0.000 0.000 0.00(

0.235 SSW 0.000 0.000 0 .000 0.094 0.094 0.000 0.000 0.000 0. 00(0 0.188 SW 0.000 0.000 0.000 0.141 0.235 0.000 0 .000 0.000 0.00(

0.376 WSW 0.000 0.000 C.000 0.000 0.047 0.000 O.000 0.000 0.00(

0.047 W 0.000 0.000 C.000 0.000 0.000 0.094 0.000 0.000 0.00(

0.094 WNW 0.000 0.000 C.000 0.000 0.047 0.141 0.141 0.000 0.000 0.329 NW 0.000 0.000 0.047 0.000 0.000 0.141 0.000 0.000 0.000 0.188 NNW 0.000 0.000 0.000 0.047 0.047 0.047 0.000 0.000 0.00)1 0.141 SUB1TOTAI 0.000 0.000 0.188 1.175 0.846 0 .846 0.141 0.000 0.000) 3.19' TOTPL HOURS OF VALID STABILITY OBSERVATIONS 2128 TOTPL HOURS OF STABILITY CLASS C 68 IOTPL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 68 TOTIL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2128 TOTIbL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STAEILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 ME.ERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED:

2005/06/C2 MEAN WIND SPEED - 6.60 NOTE;: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A24

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, 2005 - MAR 31, 2005 WIND WIND SPEED(MPH)

DIRECTIOA 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 0.094 0.987 1.175 1.457 1.222 0.000 0.000 0.00c 4.934 NNE 0.000 0.000 1.457 2.256 2.679 2.867 0.000 0.000 0 .00C 9.258 NE 0.000 0.047 1.034 0.329 0.282 0.047 0.000 0.000 0.00c 1.739 ENE 0.000 0.047 0:329 0.047 0.000 0.000 0.000 0.000 0.00C 0.423 E 0.000 0.047 0.282 0.000 0.000 0.000 0.000 0.000 0.00c 0.329 ESE 0.000 0.047 0.188 0.000 0.000 0.000 0.000 0.000 0.00c 0.235 SE 0.000 0.047 0.141 0.000 0.000 0.000 0.000 0.000 0 .OOC 0.188 SSE 0.000 0.000 0.141 0.141 0.000 0.000 0.047 0.000 0.00C 0.329 S 0.000 0.000 0.611 0.705 0.188 0.423 0.000 0.000 0.00C 1.927 SSW 0.000 0.047 1.551 2.773 0.987 0.329 0.000 0.000 0.00C 5.686 SW 0.000 0.047 0.799 2.444 0.752 0.470 0.000 0.000 0.00C 4.511 WSW 0.000 0.000 0.329 0.752 0.282 0.282 0.000 0.000 0.00C 1.645 W 0.000 0.047 0.188 0.235 0.235 0.282 0.000 0.000 0.00C 0.987 WNW 0.000 0.141 0.000 0.188 0.376 0.893 0.047 0.000 0.00C 1.645 NW 0.000 0.094 0.188 0.470 0.752 0.940 0.094 0.000 0.0CC 2.538 NNW 0.000 0.141 0.470 0.094 0.470 1.222 0.094 0.000 0.00C, 2.491 SUBTOTAL 0.000 0.846 8.694 11.607 8.459 8.976 0.282 0.000 0.00C.

38.863 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2128 TOTAL HOURS OF STABILITY CLASS D 827 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 827 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2128 TOTAL HOURS CALM C 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:

2005/06/02 MEAN WIND SPEED - 5.54 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-5

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, 2005 - MAR 31, 2005 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 0.188 1.739 1.081 0.282 0.000 0.000 0.000 0.000 3.289 NNE 0.000 0.282 2.726 2.256 0.188 0.000 0.000 0.000 0.000 5.451 NE 0.000 0.188 0.658 0.141 0.047 0.000 0.000 0.000 0.000 1.034 ENE 0.000 0.141 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.188 E 0.000 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.094 ESE 0.000 0.141 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.188 SE 0.000 0.094 0.188 0.000 0.000 0.000 0.000 0.000 0.000 0.282 SSE 0.000 0.141 0.423 0.047 0.047 0.047 0.000 0.000 0.000 0.705 S 0.000 0.376 1.363 0.705 0.329 0.235 0.000 0.000 0.000 3.008 SSW 0.000 0.376 2.679 1.974 0.705 0.282 0.000 0.000 0.000 6.015 SW 0.000 0.188 2.538 2.256 0.470 0.188 0.000 0.000 0.000 5.639 WSW 0.000 0.188 0.329 0.329 0.047 0.000 0.000 0.000 0.000 0.893 W 0.000 0.000 0.235 0.047 0.047 0.047 0.000 0.000 0.000 0.376 WNW 0.000 0.141 0.376 0.188 0.047 0.000 0.000 0.000. 0.000 0.752 NW 0.000 0.141 0.423 0.470 0.047 0.000 0.000 0.000 0.000 1.081 NNW 0.000 0.094 0.705 0.376 0.188 0.047 0.000 0.000 0.000 1.410 SUBTOTAL 0.000 2.773 14.474 9.868 2.444 0.846 0.000 0.000 0.000 30.404 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2128 TOTAL HOURS OF STABILITY CLASS E 647 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 647 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2128 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STAB::LITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED:

2005/06/0:'

MEAN WIND SPEED - 3.40 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-6

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 JAN 1, 2005 - MAR 31, 2005 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >-24.5 TOTAL N 0.000 0.047 0.423 0.047 0.000 0.000 0.000 0.000 0.OOt' 0.517 NNE 0.000 0.141 2.773 0.423 0.000 0.000 0.000 0.000 0.00c' 3.336 NE 0.000 0.282 0.987 0.141 0.000 0.000 C.000 0.000 0.00' 1.410 ENE 0.000 0.094 0.000 0.000 0.000 0.000 C.000 0.000 0.000 0.094 E 0.000 0.047 C.141 0.000 0.000 0.000 0.000 0.000 0.00(1 0.188 ESE 0.000 0.141 C.047 0.047 0.000 0.000 0.000 0.000 0.00(1 0.235 SE 0.000 0.235 C.235 0.000 0.000 0.000 0.000 0.000 0.000 0.470 SSE 0.000 0.141 C.094 0.047 0.047 0.000 0.000 0.000 0.00(1 0.329 S 0.000 0.235 0.799 0.094 0.000 0.000 0.000 0.000 0.00()

1.128 SSW 0.000 0.094 1.645 0.188 0.000 0.000 0.000 0.000 0.00()

1.927 SW 0.000 0.188 1.410 0.376 0.094 0.000 0.000 0.000 0.00(1 2.068

WSW 0.000 0.141 0.376 0.000 0.047 0.000 0.000 0.000 0.000 0.564 W 0.000 0.047 0.188 0.000 0.000 0.000 0.000 0.000 0.00(

0.235 WNW 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.00()

0.047 NW 0.000 0.047 0.000 0.047 0.000 0.000 0.000 0.000 0.001) 0.094 NNW 0.000 0.047 0.094 0.000 0.000 0.000 0.000 0.000 0.00')

0.141 SUETOTAl 0.000 1.927 9.211 1.410 0.235 0.000 0.000 0.000 0.00) 12.782 TOTPL HOURS OF VALID STABILITY OBSERVATIONS 2128 TOTPL HOURS OF STABILITY CLASS F 272 TOTPL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 272 TOTPL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2128 TOTPL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STAIEILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED:

2005/06/C2 MEA: WIND SPEED - 2.41 NOTE,: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-7

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, 2005 - MAR 31, 2005 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >-24.5 TOTAL N 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 NNE 0.009 0.094 1.128 0.000 0.000 0.000 0.000 0.000 0.000 1.231 NE 0.012 0.329 1.316 0.047 0.000 0.000 0.000 0.000 0.000 1.704 ENE 0.004 0.517 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.615 E 0.001 0.047 0.141 0.000 0.000 0.000 0.000 0.000 0.000 0.189 ESE 0.001 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.095 SE 0.001 0.094 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.142 SSE 0.001 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.095 S 0.002 0.235 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.284 SSW 0.008 0.235 0.846 0.047 0.000 0.000 0.000 0.000 0.000 1.136 SW 0.006 0.094 0.752 0.141 0.000 0.000 0.000 0.000 0.000 0.993 WSW 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 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 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 NNW 0.000 0.047 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.094 SUB'TOTAL 0.047 1.880 4.511 0.282 0.000 0.000 0.000 0.000 0.000 6.72 0 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2128 TOTAL HOURS OF STABILITY CLASS G 143 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 143 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2128 TOTAL HOURS CALM 1 METECROWOGICAL 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:

2005/06/0; MEAN WIND SPEED - 1.91 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-8

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

Sequoyah Nuclear Plant APR 1, 2005 - JUN 30, 2005 WIND WIND SPEED(MPH)

DIRECTIONi 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 0.094 0.047 0.281 0.000 0.000 0.000 0.422 NNE 0.000 0.000 0.187 1.124 0.562 0.094 0.000 0.000 0.000 1.967 NE 0.000 0.000 0.422 0.796 0.562 0.187 0.000 0.000 0.000 1.967 ENE 0.000 0.000 0.281 0.094 0.047 0.000 0.000 0.000 0.000 0.422 E 0.000 0.000 0.047 0.141 0.000 0.000 0.000 0.000 0.000 0.187 ESE 0.000 0.000 0.047 0.000 0.047 0.000 0.000 0.000 0.000 0.094 SE 0.000 0.000 0.047 0.094 0.000 0.000 0.000 0.000 0.000 0.141 SSE 0.000 0.000 0.047 0.094 0.000 0.047 0.000 0.000 0.000 0.187 S 0.000 0.000 0.094 0.187 0.187 0.000 0.000 0.000 0 .OOC 0.468 SSW 0.000 0.000 0.187 0.984 0.234 0.094 0.000 0.000 0 .OOC 1.499 SW 0.000 0.000 0.187 0.703 0.328 0.000 0.000 0.000 0.00c 1.218 WSW 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.OOc 0.047 W 0.000 0.000 0.000 0.000 0.000 0.094 0.000 0.000 0.00c 0.094 WNW 0.000 0.000 0.000 0.000 0.000 0.187 0.000 0 .000 0 .OOC 0.187 NW 0.000 0.000 0.000 0.000 0.000 0.141 0.000 0.000 0.00C 0.141 NNW 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.047 SUBTOTAL 0.000 0.000 1.546 4.356 2.014 1.171 0.000 0.000 0.OOC 9.087 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2155 TOTAL HOURS OF STABILITY CLASS A 194 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 194 TOTA'. HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2135 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:

2005/08/25 MEAN WIND SPEED - 5.20 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-9

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, 2005 - JUN 30, 2005 WIND WIND SPEED(MPH)

DIRECTIOW 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 0.094 0.094 0.000 0.000 0.000 0.000 0.187 NNE 0.000 0.000 0.047 0.141 0.000 0.047 0.000 0.000 0.000 0.234 NE 0.000 0.000 0.187 0.234 0.047 0.000 0.000 0.000 0.000 0.468 ENE 0.000 0.000 0.047 0.141 0.000 0.000 0.000 0.000 0.000 0.187 E 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 ESE 0.000 0.000 0.094 0.047 0.000 0.000 0.000 0.000 0.000 0.141 SE 0.000 0.047 0.094 0.047 0.000 0.000 0.000 0.000 0.000 0.187 SSE 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 S 0.000 0.000 0.187 0.094 0.000 0.047 0.000 0.000 ,0.000 0.328 SSW 0.000 0.000 0.281 0.422 0.234 0.000 0.000 0.000 0.000 0.937 SW 0.000 0.000 0.375 0.703 0.000 0.000 0.000 0.000 0.000 1.077 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 0.047 0.000 0.000 0.000 0.047 WNW 0.000 0.000 0.000 0.000 0.000 0.094 0.047 0.000 0.000 0.141 NW 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 NNW 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 SUBTOTAL 0.000 0.047 1.358 2.014 0.422 0.234 0.047 0.000 0.000 4.122 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2155 TOTAL HOURS OF STABILITY CLASS B 89 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 88 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIOl IS 2135 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:

2005/08/25 MEAN WIND SPEED - 4.44 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-1 0

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, 2005 - JUN 30, 2005 WIND WIND SPEED(MPH)

DIRECTIO.1 CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >-24.5 TOTAL N 0.000 0.000 0.047 0.094 0.141 0.047 0.000 0.000 0.OOC 0.328 NNE 0.000 0.047 0.141 0.141 0.187 0.000 0.000 0.000 0.00c 0.515 NE 0.000 0.000 0.187 0.328 0.094 0.000 0.000 0.000 0.00c 0.609 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.OOC 0.000 E 0.000 0.000 0.141 0.000 0.000 0.000 0.000 0.000 0.00C 0.141 ESE 0.000 , 0.000. 0.047 0.094 0.000 0.000 0.000 0.000 0'.00C 0.141 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 .OOC 0.000 SSE 0.000 0.000 0.094 0.047 0.000 0.047 0.000 0.000 0.00C 0.187 S 0.000 0.000 0.094 0.281 0.000 0.141 0.000 0.000 0.00C 0.515 SSW 0.000 0.000 0.094 0.562 0.187 0.000 0.000 0.000 O.00(

0.843 SW 0.000 0.000 0.328 0.749 0.187 0.000 0.000 0.000 0.0CC 1.265 WSW 0.000 0.000 0.000 0.047 0.094 0.000 0.000 0.000 0.0CC 0.141 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0OC 0.000 WNW 0.000 0.000 0.000 0.094 0.234 .0.047 0.000 0.000 0.0CC 0.375 NW 0.000 0.000 0.000 0.047 0.187 0.141 0.000 0.000 0.0CC 0.375 NNW 0.000 0.000 0.000 0.000 0.094 0.047 0.000 0.000 0.0CC 0.141 SUBTOTAL 0.000 .0.047 1.171 2.482 1.405 0.468 0.000 0.000 0.OOC 5.574 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2155 TOTAL HOURS OF STABILITY CLASS C 119 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 119 TOTA'. HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2135 TOTAL HOURS CALM a METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABlLITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED:

2005/08/25 MEAN WIND SPEED - 4.82 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-11

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, 2005 - JUN 30, 2005 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' 0.094 0.890 0.375 0.328 0.094 0.000 0.000 0.000 1.780 NNE 0.000 0.094 1.499 1.874 0.562 0.187 0.000 0.000 0.000 4.215 NE 0.000 0.000 0.796 0.328 0.094 0.000 0.000 0.000 0.000 1.218 ENE 0.000 0.000 0.281 0.141 0.000 0.000 0.000 0.000 0.000 0.422 E 0.000 0.000 0.234 0.141 0.047 0.000 0.000 0.000 0.000 0.422 ESE 0.000 0.000 0.281 0.000 0.000 0.000 0.000 O.000 0.000 0.281 SE 0.000 0.047 0.281 0.094 0.047 0.000 0.000 0.000 0 .000 0.468 SSE 0.000 0.047 0.562 0.375 0.000 0.422 0.000 0.000 0.000 1.405 S 0.000 0.000 1.686 1.358 0.141 0.141 -0.000 0.000 0.000 3.326 SSW 0.000 0.187 2.576 1.920 0.187 0.000 0.000 0.000 0.000 4.871 SW 0.000 0.047 2.529 2.061 0.375 0.000 0.000 0.000 0.000 5.012 WSW 0.000 0.000 0.749 0.515 0.234 0.047 0.000 0.000 0.000 1.546 W 0.000 0.000 0.234 0.281 0.187 0.328 0.000 0.000 0.000 1.030 WNW 0.000 0.047 0.281 0.281 0.375 0.515 0.000 0.000 0.000 1.499 NW 0.000 0.000 0.234 0.328 0.796 0.328 0.000 0.000 0.000 1.686 NNW 0.000 0.187 0.281 0.515 0.468 0.047 0.000 0.000 0.000 1.499 SUBTOTAL 0.000 0 749 13.396 10.585 3.841 2.108 0.000 0.000 0.000 30.679 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2155 TOTAL HOURS OF STABILITY CLASS D 664 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 655 TOTAL HOURS OF VALID WIND DIRECTION-UIND SPEED-STABILITY OBSERVATIONS 2135 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:

2005/08/2(;

MEAN WIND SPEED - 4.07 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-12

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 1, 2005 - JUN 30, 2005 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 0.468 3.513 1.311 0.094 0.000 0.000 0.000 O.00c 5.386 NNE 0.000 0.468 2.342 0.703 0.047 0.000 0.000 0.000 O .OOC 3.560 NE 0.000 0.328 0.422 0.234 0.000 0.000 0.000 0.000 O.OOC 0.984 ENE 0.000 0.094 0.281 0.000 0.000 0.000 0.000 0.000 O.OOC 0.375 E 0.000 0.234 0.234 0.000 0.000 0.000 0.000 0.000 O.OOC 0.468 ESE 0.000 0.094 0.047 0.000 0.000 0.000 0.000 0.000 O.OOC 0.141 SE 0.000 0.422 0.515 0.000 0.000 0.000 0.000 0.000 O.OOC 0.937 SSE 0.000 0.609 0.562 0.000 0.047 0.094 0.000 0.000 O .OOC 1.311 S 0.000 0.281 0.937 0.234 0.515 0.234 0.000 0.000 0.00O 2.201 SSW 0.000 0.328 2.998 0.703 0.141 0.000 0.000 0.000 0 .00(

4.169 SW 0.000 .0.468 2.482 0.796 0.000 0.000 0.000 0.000 0 .00(

3.747 WSW 0.000 0.141 1.077 0.187 0.047 0.047 0.000 0.000 0. O0t 1.499 W 0.000 0.187 1.030 0.328 0.047 0.000 0.000 0.000 0.00(1 1.593 WNW 0.000 0.328 0.703 0.375 0.047 0.000 O.000 0.000 0.00(1 1.452 NW 0.000 0.234 C.375 0.422 0.187 0.047 C.000 0.000 0.00(

1.265 NNW 0.000 0.328 C.890 0.328 0.094 0.000 C.000 0.000 0.000 1.639 SUBTOTAL 0.000 5.012 18.407 5.621 1.265 0.422 0.000 0.000 0.00(

30.726 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2155 TOTAL HOURS OF STABILITY CLASS E 663 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 656 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIOZiS 2135 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:

2005/08/26 MEAN WIND SPEED - 2.70 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-13

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 APR 1, 2005 - JUN 30. 2005 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 0.468 1.920 0.047 0.000 0.000 0.000 0.000 0.000 2.436 NNE 0.000 0.515 2.998 0.000 0.000 0.000 0.000 0.000 0.000 3.513 NE 0.000 0.562 0.749 0.000 0.000 0.000 0.000 0.000 0.000 1.311 ENE 0.000 0.328 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.422 E 0.000 0.422 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.515 ESE 0.000 0.468 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.562 SE 0.000 0.703 0.141 0.000 0.000 0.000 0.000 0.000 0.000 0.843 SSE 0.000 0.468 0.187 0.000 0.000 0.000 0.000 0.000 0.000 0.656 S 0.000 0.375 0.703 0.234 0.000 0.000 0.000 0.000 0.000 1.311 SSW 0.000 0.234 1.171 0.000 0.000 0.000 0.000 0.000 0.000 1.405 SW 0.000 0.234 0.703 0.000 0.000 0.000 0.000 0.000 0.000 0.937 WSW 0.000 0.094 0.375 0.000 0.000 0.000 0.000 0.000 0.000 0.468 W 0.000 0.047 0.094 0.047 0.000 0.000 0.000 0.000 0.000 0.187 WNW 0.000 0.094 0.094 0.000 0.047 0.000 0.000 0.000 0.000 0.234 NW 0.000 0.047 0.141 0.000 0.000 0.000 . 0.000 0.000 0.000 0.187 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 5.059 9.555 0.328 0.047 0.000 0.000 0.000 0.000 14.988 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2155 TOTAL. HOURS OF STABILITY CLASS F 323 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 320 TOTAL. HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2135 TOTAL HOURS CALM METEOROLOGICAL FACILITY: Sequcyah 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:

2005/08/2(;

MEAN WIND SPEED - 1.89 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-14

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

Sequoyah Nuclear Plant APR 1, 2005 - JUN 30, 2005 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 TOTAL N 0.001 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.095 NNE 0.005 0.094 0.422 0.000 0.000 0.000 0.000 0.000 0.000 0.520 NE 0.006 0.187 0.422 0.000 0.000 0.000 0.000 0.000 0.000 0.615 ENE 0.002 0.094 0.094 0.000 0.000 0.000 0.000 0.000 0.000

.0.189 E 0.003 0.234 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.284 ESE 0.004 0.375 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.378 SE 0.005 0.515 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.520 SSE 0.005 0.422 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.520 S 0.007 0.375 0.375 0.000 0.000 0.000 0.000 0.000 0.000 0.757 SSW 0.007 0.094 0.609 0.000 0.000 0.000 0.000 0.000 0.000 0.709 SW 0.001 0.000 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.095 WSW 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 W 0.001 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.095 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 0.047 2.529 2.248 0.000 0.000 0.000 0.000 0.000 0.000 4.824 TOTAL HOURS OF VALID STABILITY OBSER'JATIONS 2155 TOTAL HOURS OF STABILITY CLASS G 103 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 103 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2135 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STAB::LITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED:

2005/08/2'S MEAN WIND SPEED - 1.52 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-15

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

Sequoyah Nuclear Plant JUL 1, 2005 - SEP 30, 2005 WIND WIND SPEED(MPH)

DIRECTIO:A 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 0.183 0.275 0.000 0.000 0.000 O.OOC 0.458 NNE 0.000 0.000 0.550 1.558 1.100 0.000 0 .000 0.000 0.00C 3.208 NE 0.000 0.000 0.687 0.733 0.137 0.000 0.000 0.000 O.OOC 1.558 ENE 0.000 0.000 0.183 0.046 0.000 0.000 0.000 0.000 0.00C 0.229 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.O0c, 0.000 ESE 0.000 0.000 0 .000 0.000 0.000 0.000 0.000 0.000 0.00(0 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 C.000 0.000 0.046 0.000 0.000 0.000 0.00(

0.046 S 0.000 0.000 C .000 0.000 0.000 0.000 0.000 0.000 0.00(1 0.000 SSW 0.000 0.000 C .000 0.504 0.000 0.000 C .000 0.000 0.00(0 0.504 SW 0.000 0.000 C.000 0.000 0.000 0.000 0 .000 0.000 0. 00(1 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00(3 0.000 W 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.00()

0.046 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00()

0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00(

0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00) 0.000 SUBTOTAI 0.000 0.000 1.467 3.025 1.558 0.000 0.000 0.000 0.001) 6.049 TOTA.L HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTA.L HOURS OF STABILITY CLASS A 132 TOTP.L HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 132 TOTP.L HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2182 TOTA.L HOURS CALM 0 METIOROLOGICAL FACILITY: Sequoyah Nuclear Plant STATEILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED:

2005/12/(5 MEAN WIND SPEED - 4.53 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-16

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, 2005 - SEP 30, 2005 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 C.137 0.229 0.000 0 .000 C.000 0.000 0.00(1 0.367 NNE 0.000 0.000 C.458 0.779 0.137 0.000 0.000 0.000 0.00(1 1.375 NE 0.000 0.000 1.008 0.183 0.046 0.000 C .000 0.000 0.00(1 1.237 ENE 0.000 0.000 C.092 0.000 0.000 0.000 O.000 0.000 0.00(

0.092 E 0.000 0.000 C.092 0.046 0.000 0.000 0 .000 0.000 0.00(0 0.137 ESE 0.000 0.000 C.000 0.000 0.000 0.000 0.000 0.000 0.00(1 0.000 SE 0.000 0.000 C.046 0.000 0.000 0.000 0 .000 0.000 0.00(1 0.046 SSE 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.00(

0.046 S 0.000 0.000 0 .000 0.275 0.046 0.000 0.000 0.000 0.00(

0.321 SSW 0.000 0.000 0.046 0.183 0.046 0.000 0.000 0.000 0. 0.(

0.275 SW 0.000 0.000 0.046 0.092 0.000 0.000 0.000 0.000 0.00(

0.137 WSW 0.000 0.000 0 .000 0.046 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. 00(

0.000 WNW 0.000 0.000 0.000 0 .000 0.000 0.000 0.000 0.000 0. 00(

0.000 NW 0.000 0 .000 0.000 0.000 0.000 0.000 0.000 0.000 0.00(0 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0. 00(

0.000 SUBTOTAL 0.000 0.000 1.925 1.879 0.275 0.000 0.000 0.000 0.00(

4.079 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL HOURS OF STABILITY CLASS B 90 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 89 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2182 TOTAL HOURS CALM 0 METE)ROLOGICAL 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:

2005/12/05 MEAN WIND SPEED - 3.76 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-17

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, 2005 - SEP 30, 2005 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.!}

TOTAL N 0.000 0.000 0.229 0.367 0.092 0.000 0.000 0.000 0.000 0.687 NNE 0.000 0.000 0.825 0.779 0.275 0.000 0.000 0.000 0.000 1.879 NE 0.000 0.000 0.504 0.092 0.000 0.000 0.000 0.000 0.000 0.596 ENE 0.000 0.000 0.183 0.092 0.000 0.000 0.000 0.000 0.000 0.275 E 0.000 0.000 0.229 0.046 0.000 0.000 0.000 0.000 0.000 0.27E ESE 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.092 SE 0.000 0.000 0.092 0.137 0.000 0.000 0.000 0.000 0.000 0.229 SSE 0.000 0.000 0.046 0.046 0.046 0.137 0.046 0.000 0.000 0.321 S 0.000 0.000 0.000 0.412 0.000 0.000 0.000 0.000 0.000 0.412 SSW 0.000 0.000 0.046 1.329 0.092 0.000 0.000 0.000 0.000 1.467 SW 0.000 0.000 0.183 0.229 0.000 0.000 0.000 0.000 0.000 0.412 WSW 0.000 0.000 0.046 0.137 0.000 0.000 0.000 0.000 0.000 0.183 W 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 WKNW 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 0.046 0.046 0.000 0.000 0.000 0.000 0.092 SUBTOTAL 0.000 0.000 2.475 3.758 0.550 0.137 0.046 0.000 0.0OC 6.966 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL HOURS OF STABILITY CLASS C 152 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 152 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2182 TOTAL HOURS CALM 0 METE0ROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETW3EN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURD AT 9.73 METER LEVEL DATE PRINTED 2005/12/05 MEAN WIND SPEED - 4.07 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-18

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, 2005 - SEP 30, 2005 WIND WIND SPEED(MPH)

DIRECTIOI! 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 2.200 1.558 0.183 0.046 0.000 0.000 0.000 3.987 NNE 0.000 0.046 1.512 1.558 0.733 0.229 0.000 0.000 0.000 4.079 NE 0.000 0.046 0.642 0.367 0.137 0.092 0.000 0.000 0.000 1.283 ENE 0.000 0.046 0.642 0.092 0.000 0.000 0.000 0.000 0.000 0.779 E 0.000 0.000 0.412 0.000 0.046 0.000 0.000 0.000 0.000 0.458 ESE 0.000 0.000 0.458 0.046 0.000 0.000 0.000 0.000 0.000 0.504 SE 0.000 0.092 0.687 0.183 0.046 0.046 0.000 0.000 0.000 1.054 SSE 0.000 0.000 0.917 0.367 0.367 0.596 0.275 0.000 0.000 2.521 S 0.000 0.000 2.521 2.612 0.092 0.321 0.046 0.000 0.000 5.591 SSW 0.000 0.046 3.437 3.850' 0.092 0.000 0.000 0.000 0.000 7.424 SW 0.000 0.000 1.237 1.237 0.000 0.229 0.000 0.000 0.000 2.704 WSW 0.000 0.092 0.504 0.229 0.137 0.000 0.000 0.000 0.000 0.962 W 0.000 0.000 0.092 0.183 0.000 0.000 0.000 0.000 0 :000 0.275 WNW 0.000 0.046 0.183 0.092 0.000 0.046 0.000 0.000 0.000 0.367 NW 0.000 0.000 0.229 0.000 0.046 0.000 0.000 0.000 0.000 0.275 NNW 0.000 0.000 0.779 0.596 0.137 0.046 0.000 0.000 0.000 1.558 SUBTOTAL 0.000 0.412 16.453 12.970 2.016 1.650 0.321 0.000 0.000 33.822 TOTA:; HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAX HOURS OF STABILITY CLASS D 738 TOTA; HOURS OF VALID WIND DIRECTION-wIND SPEED-STABILITY CLASS D 738 TOTA:; HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2182 TOTA:. 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:

2005/12/0; MEAN WIND SPEED - 3.85 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-19

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, 2005 - SEP 30, 2005 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 0.779 6.416 0.733 0.046 0.000 0.000 0.000 0.000 7.974 NNE 0.000 0.642 3.666 0.550 0.137 0.000 0.000 0.000 0.000 4.995 NE 0.000 0.367 0.550 0.183 0.092 0.000 0.000 0.000 0.000 1.192 ENE 0.000 0.183 0.229 0.046 0.000 0.000 0.000 0.000 0.000 0.458 E 0.000 0.000 0.367 0.046 0.000 0.000 0.000 0.000 . 0.000 0.412 ESE 0.000 0.458 0.367 0.000 0.046 0.000 0.000 0.000 0.000 0.871 SE 0.000 0.183 0.458 0.046 0.000 0.046 0.000 0.000 0.000 0.733 SSE 0.000 0.229 0.596 0.092 0.046 0.000 0.046 0.000 0.000 1.008 S 0.000 0.596 2.475 0.458 0.137 0.183 0.000 0.000 0.000 3.850 SSW 0.000 0.642 2.108 0.275 0.000 0.000 0.000 0.000 0.000 3.025 SW 0.000 0.412 1.421 0.000 0.000 0.000 0.000 0.000 0.000 1.833 WSW 0.000 0.596 1.146 0.275 0.000 0.000 0.000 0.000 0.000 2.016 W 0.000 0.229 0.642 0.046 0.000 0.000 0.000 0.000 0.000 0.917 WNW 0.000 0.275 0.504 0.046 0.046 0.000 0.000 0.000 0.000 0.871 NW 0.000 0.412 0.596 0.137 0.000 0.046 0.000 0.000 0.000 1.192 NNW 0.000 0.825 2.016 0.183 0.000 0.000 0.000 0.000 0.000 3.025 SUBTOTAL 0.000 6.829 23.556 3.116 0.550 0.275 0.046 0.000 0.000 34.372 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL HOURS OF STABILITY CLASS E 750 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 750 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS. 2182 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABLITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED:

2005/12/0!i MEAN WIND SPEED - 2.31 NOTE TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-20

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, 2005 - SEP 30, 2005 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 0.229 4.170 0.137 0.000 0.000 0.000 0.000 0.000 4.537 NNE 0.000 1.146 4.995 0.000 0.000 0.000 0.000 0.000 0.000 6.141 NE 0.000 0.504 0.367 0.000. 0.000 0.000 0.000 0.000 0.000 0.871 ENE 0.000 0.183 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.183 E 0.000 0.137 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.229 ESE 0.000 0.092 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.137 SE 0.000 0.137 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.183 SSE 0.000 0.046 0.137 0.000 0.000 0.000 0.000 0.000 0.000 0.183 S 0.000 0.092 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.183 SSW 0.000 0.046 0.412 0.000 0.000 0.000 0.000 0.000 0.000 0.458 SW 0.000 0.092 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.183 WSW 0.000 0.046 0.229 0.000 0.000 0.000 0.000 0.000 0.000 0.275 W 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.092 WNW 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.092 NW 0.000 0.000 0.183 0.000 0.000 0.000 0.000 0.000 0.000 0.183 NNW 0.000 0.092 0.550 0.000 0.000 0.000 0.000 0.000 0.000 0.642 SUBTOTAL 0.000 2.933 11.503 0.137 0.000 0.000 0.000 0.000 0.000 14.574 TOTAL. HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL. HOURS OF STABILITY CLASS F 318 TOTAL. HOURS OF VALID WIND DIRECTION-HIND SPEED-STABILITY CLASS F 318 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2182 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STAB::LITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED:

2005/12/0!5 MEAN WIND SPEED - 1.92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-21

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

. Sequoyah Nuclear Plant JUL 1, 2005 - SEP 30, 2005 WIND WIND SPEED(MPH)

DIRECTIO g 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 0.000 0.000 0.000 0.000 0 .OOC 0.000 NNE 0.000 0.000 0.137 0.000 0.000 0.000 0.000 0.000 0.00c 0.137 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00c 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 .OOC 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 .OOC 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00c 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 0.00c 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 .000 0.000 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 0.00(0 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00(1 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00(1 0.000 SUBTOTAL 0.000 0.000 C.137 0.000 0.000 0.000 0.000 0.000 0.0001 0.137 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2183 TOTAL HOURS OF STABILITY CLASS G 213 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 3 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2182 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WINO SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED:

2005/12/05 MEAN WIND SPEED - 2.00 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-22

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<--l.9 C/100 M)

Sequoyah Nuclear Plant OCT 1, 2005 - DEC 31, 2005 WIND WIND SPEED(MPH)

DIRECTIO. 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 0.046 0.000 0.000 0.00c 0.092 NNE 0.000 0.000 0.000 0.782 1.057 0.230 0.000 0.000 0 .OOC 2.069 NE 0.000 0.000 0.046 0.322 0.322 0.000 0.000 0.000 0.00c 0.690 ENE 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0 .OOC 0.092 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00c 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.00C 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 .OOC 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00c 0.000 S 0.000 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0 .OOC 0.092 SSW 0.000 0.000 0.000 0.138 0.184 0.092 0.000 0.000 0.00c 0.414 SW 0.000 0.000 0.000 0.184 0.184 0.276 0.000 0.000 0.OOc 0.644 WSW 0.000 0.000 0.000 0.046 0.000 0.092 0.000 0.000 O.00c 0.138 W 0.000 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.00c 0.092 WNW 0.000 0.000 0.000 0.000 0.046 0.046 0.000 0.000 O.00c 0.092 NW 0.000 0.000 0.000 0.000 0.092 0.000 0.000 0.000 O.00c 0.092 NNW 0.000 0.000 0.000 0.046 0.046 0.092 0.000 0.000 0.00c 0.184 SUB- TOTAL 0.000 0.000 0.138 1.563 2.069 0.920 0.000 0.000 0. DOC 4.69(

TOTA'; HOURS OF VALID STABILITY OBSERVATIONS 2178 TOTA'. HOURS OF STABILITY CLASS A 102 TOTA' HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 102 TOTA'; HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIO? iS 2175 TOTA'; 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:

2006/02/1:3 MEAN WIND SPEED - 6.12 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-23

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<--l.7 C/100 M)

Sequoyah Nuclear Plant OCT 1, 2005 - DEC 31, 2005 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.'

TOTAL N 0.000 0.000 0.000 0.230 0.184 0.046 0.000 0.000 0.000 0.460 NNE 0.000 0.000 0.092 0.414 0.230 0.230 0.000 0.000 0.000 0.966 NE 0.000 0.000 0.414 0.322 0.046 0.000 0.000 0.000 0.000 0.782 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.138 0.000 0.000 0.000 0.000 0.000 0.138 SSW 0.000 0.000 0.000 0.230 0.230 0.046 0.000 0.000 0.000 0.506 SW 0.000 0.000 0.000 0.414 0.092 0.046 0.000 0.000 0.000 0.552 WSW 0.000 0.000 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0.092 W 0.000 0.000 0.000 0.000 0.092 0.046 0.000 0.000 0.000 0.138 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 0.046 0.092 0.000 0.000 0.000 0.138 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.OOC SUBTOTAL 0.000 0.000 0.506 1.747 0.920 0.598 0.000 0.000 0.000 3.770 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2178 TOTAL HOURS OF STABILITY CLASS B 82 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 82 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2175 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STAB::LITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED:

2006/02/1:l MEAN WIND SPEED - 5.38 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-24

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, 2005 - DEC 31, 2005 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.'

TOTAL N 0.000 0.000 0.046 0.322 0.138 0.138 0.000 0.000 0.000 0.644 NNE 0.000 0.000 0.092 0.184 0.598 0.184 0.000 0.000 0.000 1.057 NE 0.000 0.000 0.184 0.322 0.184 0.000 0.000 0.000 0.000 0.690 ENE 0.000 0.000 0.046 0.092 0.000 0.000 0.000 0.000 0.000 0.138 E 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.092 ESE 0.000 0.000 0.046 0.000 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 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.138 0.092 0.000 0.000 0.000 0.000 0.230 SSW 0.000 0.000 0.092 0.552 0.046 0.092 0 .000 0.000 0.000 0.782 SW 0.000 0.000 0.092 0.368 0.092 0.046 0.000 0.000 0.000 0.598 WSW 0.000 0.000 0.092 0.092 0.000 0.046 0.000 0.000 0.000 0.230 W 0.000 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.092 WN4W 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 NW 0.000 O0.000 0.046 0.046 0 .000 0.046 0.000 0.000 0.000 0.138 NNW 0 .000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 SUBTOTAL 0.000 0.000 0.782 2.207 1.333 0.552 0.000 0.000 0.000 4.874 TOTA, HOURS OF VALID STABILITY OBSERVATIONS 2178 TOTA. HOURS OF STABILITY CLASS C 108 TOTA-; HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 106 TOTA'; HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2175 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:

2006/02/13 MEAN WIND SPEED - 5.08 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-25

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, 2005 - DEC 31, 2005 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.!

TOTAL N 0.000 0.000 0.828 1.241 1.931 0.414 0.000 0.000 0.000 4.414 NNE 0.000 0.046 1.103 2.069 2.621 0.736 0.000 0.000 0.000 6.575 NE 0.000 0.000 0.552 0.368 0.644 0.138 0.000 0.000 0.000 1.701 ENE 0.000 0.000 0.138 0.046 0.000 0.000 0.000 0.000 0.000 0.184.

E 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.092 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 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.092 SSE 0.000 0.000 0.092 0.092 0.000 0.000 0.000 0.000 0.000 0.184 S 0.000 0.000 0.414 0.460 0.506 0.460 0.276 0.000 0.000 2.115 SSW 0.000 0.092 0.966 2.115 0.644 0.092 0.000 0.000 0.000 3.908 SW 0.000 0.000 1.057 0.874 0.276 0.138 0.000 0.000 0.000 2.345 WSW 0.000 0.000 0.552 0.184 0.138 0.092 0.000 0.000 0.000 0.966 W 0.000 0.138 0.322 0.092 0.184 0.276 0.000 0.000 0.000 1.011 WNW 0.000 0.000 0.368 0.368 0.460 0.138 0.000 0.000 0.000 1.333 NW 0.000 0.046 0.368 0.874 0.460 0.598 0.000 0.000 0.000 2.345 NNW 0.000 0.000 0.322 0.690 0.874 0.230 0.000 0.000 0.000 2.115 SUBTOTAL 0.000 0.368 7.218 9.471 8.736 3.310 0.276 0.000 0.000 29.379 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2178 TOTAL HOURS OF STABILITY CLASS D 639 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 639 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2175 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STAB::LITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED:

2006/02/1:

MEAN WIND SPEED - 5.04 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-26

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, 2005 - DEC 31, 2005 WIND WIND SPEED(MPH)

DIRECTIO' 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 >-24.3 TOTAL N 0.000 0.414 3.908 1.793 0.782 0.046 0 .000 0.000 0.000 6.943 NNE 0.000 0.230 4.414 2.345 0.368 0.000 0.000 0.000 0.000 7.356 NE 0.000 0.138 0.690 0.184 0.046 0.000 0.000 0.000 0.000 1.057 ENE 0.000 0.138 0.138 0.000 0.000 0.000 0.000 0.000 0.000 0.276 E 0.000 0.046 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.138 ESE 0.000 0.046 0.184 0.000 0.000 0.000 0.000 0.000 0.000 0.230 SE 0.000 0.046 0.138 0.000 0.000 0.000 0.000 0.000 0.000 0.184 SSE 0.000 0.184 0.276 0.184 0.046

0.000 0.000 0.000 0.000 0.690 S 0.000 0.230 1.655 0.644 0.552 0.184 0.046 0.000 0.000 3.310 SSW 0.000 0.184 2.621 1.103 0.368 0.000 0.000 0.000 0.000 4.276 SW 0.000 0.138 2.529 1.195 0.598 0.138 0.000 0.000 0.000 4.598 WSW 0.000 0.046 0.874 0.414 0.184 0.046 0.000 0.000 0.000 1.563 W 0.000 0.184 0.368 0.322 0.092 0.046 0.000 0.000 0.000 1.011 WNW 0.000 0.046 0.230 0.506 0.046 0.046 0.000 0.000 0.000 0.874 NW 0.000 0.046 0.552 0.414 0.276 0.092 0.000 0.000 0.000 1.379 NNW 0.000 0.230 1.379 1.103 0.644 0.092 0.000 0.000 0.000 3.448 SUBTOTAL 0.000 2.345 20.046 10.207 4.000 0.690 0.046 0.000 0.000 37.333 TOTAL HOURS OF VALID STABILITY OBSER'JATIONS 2178 TOTAL HOURS OF STABILITY CLASS E 813 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 812 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2175 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STAB::LITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED:

2006/02/1:l MEAN WIND SPEED - 3.39 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-27

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, 2005 - DEC 31, 2005 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 0.184 3.356 0.414 0.046 0.000 0.000 0.000 0.000 4.000

.NNE 0.000 0.414 5.609 0.092 0.000 0.000 0.000 0.000 0.000 6.115 NE 0.000 0.736 0.598 0.000 0.000 0.000 0.000 0.000 0.000 1.333 ENE 0.000 0.414 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.506 E 0.000 0.138 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.230 ESE 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.092 SE 0.000 0.230 0 .000 O.000 0.000 0.000 0.000 0.000 0.000 0.230 SSE 0.000 0.184 0.092 O.000 0 0.000 0.000 0.000 0.000 0.000 0.276 S 0.000 0.092 0.460 0.000 0.000 0.000 0.000 0.000 0.000 0.552 SSW 0.000 .0.046 1.103 0.000 0.000 0.000 0.000 0.000 0.000 1.149 SW 0.000 0.092 0.782 0.000 0.000 0.000 0.000 0.000 0.000 0.874 WSW 0.000 0.046 0.368 0.000 0.000 0.000 0.000 0.000 0.000 0.414 W 0.000 0.092 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.138 WNW 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.092 NW 0.000 0.000 0.092 0.092 0.046 0.000 0.000, 0.000 0.000 0.230 NNW 0.000 0.092 0.598 0.138 0.000 0.046 0.000 0.000 0.000 0.874 SUBTOTAL 0.000 2.897 13.333 0.736 0.092 0.046 0.000 0.000 0.00C 17.103 TOTA'L HOURS OF VALID STABILITY OBSERVATIONS 2178 TOTA'; HOURS OF STABILITY CLASS F 372 TOTA-; HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 372 TOTA'; HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2175 TOTA'; 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:

2006/02/13 MEAN WIND SPEED - 2.18 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-28

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, 2005 - DEC 31, 2005 WIND WIND SPEED(MPH)

DIRECTIO1 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 0.092 0.046 0.000 0.000 0.000 0.000 0.000 0.138 NNE 0.000 0.092 0.506 0.000 0.000 0.000 0.000 0.000 0.000 0.598 NE 0.000 0.184 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.276 ENE 0.000 0.138 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.138 E 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00O 0.000 SE 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.00C 0.046 SSE 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.00(

0.046 S 0.000 0.092 0.230 0.000 0.000 0.000 0.000 0.000 0.OOC 0.322 SSW 0.000 0.046 0.552 0.000 0.000 0.000 0.000 .0.000 0.OOC 0.598 SW 0.000 0.046 0.276 0.138 0.000 0.000 0.000 0.000 0.00C 0.460 WSW 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.OOC 0.046 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.OOC 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.00(

0.000 NW 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.00C 0.046 NNW 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.OOC 0.092 SUBTOTAL 0.000 0.690 1.885 0.276 0.000 0.000 0.000 0.000 0.OOC 2.851 TOTAK. HOURS OF VALID STABILITY OBSERVATIONS 2178 TOTAX HOURS OF STABILITY CLASS G 62 TOTA:.. HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 62 TOTA:; HOURS OF VALID WIND DIRECTION--HIND SPEED-STABILITY OBSERVATIONS 2175 TOTA', HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABK:LITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED:

2006/02/13 MEAN WIND SPEED - 2.16 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A2-29

Attachment 2.0 Deviations from ODCM Controls/Surveillance Requirements Date ODCM Description of Deviation Requiremen June 29, 1/2 1.1.1 Engineering notified Operations that with water flowing over Gate 2005 Table 1.1-1 Structure #1 weir the required 15,000gpm dilution flow may not Item 3.d be available even though plant compliance instrument Action 33. O-LS-27-225 indicates >1 5,000 gpm. PM 058610000 for cleaning the blowdown strainer was revised and placed on 48 week frequency. EWR 06-BOP-027-012 was issued.

Dec. 20, 1.1.2 Radiation Monitor 0-RM-90-1 01 (Auxiliary Building Stack) was 2005 Table 1.1-2 removed from service to perform an IFT. Chemistry did not install Item 4.b and back-up sampler within the required 4 hour4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months time. PER 94285.

__c. Action 441 A2-30

Attachment 3.0 Radiation Monitors Inoperable for Greater than 30 days None Compliance Instruments Inoperable for grater than 30 days 0-LS-27-225 (Cooling Tower Blowdown Effluent Line) PER 85280.

A3-1

ML061250275

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