Text

Enclosure 1 - Annual Radioactive Effluent Release Report
	ML071370320
Person / Time
Site:	Sequoyah
Issue date:	04/27/2007
From:	; Tennessee Valley Authority
To:	; Office of Nuclear Reactor Regulation
References
	Download: ML071370320 (2)
	v • d • e

ENCLOSUREI ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT SEQUOYAH NUCLEAR PLANT 2006

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2006 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 Iodine-1 31, Iodine-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

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2006 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 (p.Ci/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.

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 2.0E-04 pCi/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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EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2006 SUPPLEMENTAL INFORMATION Ill. 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 "O.OOE-01 Ci" is recorded for the release. This does not necessarily mean that no activity was released for that particular radionuclide, but that the concentration was below the ODCM and analysis LLD. Refer to Tables A and B for estimates of these typical LLD values.

A. Fission and Activation Gases Airborne effluent gaseous activity is continuously monitored and recorded.

Additional grab samples from the shield building, auxiliary building, service building, and condenser vacuum exhausts are taken and analyzed at least monthly to determine the quantity of noble gas activity released for the month based on the average vent flow rates recorded for the sample period. Also, noble gas samples are collected and evaluated for the shield and auxiliary buildings following startup, shutdown, or rated thermal power change exceeding 15 percent within one hour (sampling is only required if the dose equivalent 1-131 concentration in the primary coolant or the noble gas activity monitor shows that the containment activity has increased more than a factor of 3).

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

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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EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2006 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.

A total of eight shallow on site wells were sampled on a regular schedule during the year to monitor for tritium in on site ground water. Six of the wells are equipped with automatic composite samplers. Detectable levels of tritium have been measured in three of these shallow wells. The highest tritium concentration was approximately 1,500 pCi/L. Two additional shallow on site wells were monitored on a regular schedule by grab sampling. The highest concentration measured in samples from these wells was 17,070 pCi/L. No other radionuclides have been detected in samples from these monitoring locations. A rigorous sampling and ground water hydrology investigation has been initiated to identify the source of the tritium. The tritium is confined to shallow on site ground water and does not represent a potential for contamination of off site ground water systems.

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EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2006 V. BATCH Value 1st 2nd Half Half Units A. Liquid (Radwaste only)

1. Number of releases 91 110 Each

2. Total time period of releases 21698.0 45774.0 Minutes

3. Maximum time period of release 5502.0 4320.0 Minutes

4. Average time period of releases 238.4 416.13 Minutes

5. Minimum time period for release 75.0 69 Minutes

6. Average dilution stream flow during 21897.0 28264.5 CFS release periods E 1-5

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EFFLUENT AND WASTE DISPOSALANNUAL REPORT 2006 SUPPLEMENTAL INFORMATION B. Gaseous (Batches only, containment purges, containment vents, and waste decay tanks)

1. Number of releases 64 72 Each

2. Total time period of releases 28318.0 31269.0 Minutes

3. Maximum time period for release 6710.0 2805.0 Minutes

4. Average time period for releases 442.5 434.3 Minutes

5. Minimum time period for release 15.0 75.0 Minutes VI. ABNORMAL 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 1 Total Activity Released 0.00E-01 1.19E+01 Ci The CILRT containment release is intended to be an un-monitored release with three release pathways: one each through the Aux Bldg. and the Shield Bldg. and one through an unmonitored path to the SQN environs. For conservatism, the pressurized containment volume is modeled to be released through the un-monitored pathway at the total release rate.

This will provide the maximum calculated dose.

Pre -release samples were collected and analyzed with the following results:

1. Tritium 7.808E-8 pCi/ml

2. Noble Gas no observed activity

3. Particulate Co-58 1.424E-12 pCi/cc

4. Iodine no observed activity A pre-release permit was generated using the full containment volume of 1.1922E6 CF and a flow rate of 1.1 E4 CFM. The pre-release permit was processed to the OPEN status and no limits were exceeded.

Post release samples were collected and analyzed with the following results:

1. Tritium 2.882E-8 pCi/ml

2. Noble Gas Xe-1 33 3.333E-7 pCi/cc

3. Particulate Co-58 5.360E-1 1 pCi/cc

4. Iodine no observed activity The post-release permit was generated using the larger of the pre vs post analyses to demonstrate no limits were exceeded.

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EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2006 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 4.94E-02 4.62E-02 3.26E-02 5.91E-02 18%

2. Average diluted concentration i.Ci/ml 2.81 E-08 2.38E-08 1.27E-08 3.46E-08 during period

3. Percent of % ....

Applicable Limit B. Tritium

1. Total Released Curies 1.11E+03 3.10E+02 3.77E+02 3.92E+02 18%

2. Average diluted concentration ltCi/ml 6.31 E-04 1.60E-04 1.47E-04 2.29E-04 during period

3. Percent of %

Applicable Limit C. Dissolved and Entrained Gases

1. Total Released Curies 2.33E+00 2.04E-01 2.28E-03 6.67E-03 39%

2. Average diluted concentration paCi/ml 1.32E-06 1.05E-07 8.91E-10 3.90E-09 during period 3, Percent of % 6.60E-01 5.25E-02 4.46E-04 1.95E-03 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 5.88E+07 7.67E+07 5.29E+07 4.96E+07 4%

F. Volume of Dilution 1.70E+09 1.86E+09 2.51E+09 1.66E+09 Water for Period Liters 4%

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

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EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2006 LIQUID EFFLUENTS - TOTAL PLANT DISCHARGE Nuclide Summary (Note: Refer to Table A for ODCM nuclides reported as O.OOE-01)

Required by ODCM/Others Fission and Activation Products Continuous Mode Batch Mode Quarter Quarter Quarter Quarter Nuclide Unit lst 1t 2n 2n r

1. Silver-110M 0.OOE-01 0.OOE-01 3.93E-04 1.44E-05

2. Cobalt-57 0.OOE-01 0.OOE-01 3.09E-04 8.34E-05

3. Cobalt-58 0.OOE-01 0.OOE-01 3.21 E-02 2.80E-02

4. Cobalt-60 0.0OE-01 0.OOE-01 5.51IE-03 1.16E-03

5. Chromium-51 0.00E-01 0.00E-01 8.41E-04 6.89E-04

6. Cesium-134 0.OOE-01 0.OOE-01 3.41 E-04 0.OOE-01

7. Cesium-137 0.00E-01 0.00E-01 1.48E-03 0.00E-01

8. Cesium-138 O-OOE-01 0.OOE-01 0.O0E-01 7.41 E-06

9. fron-55 0.OOE-01 0.OOE-01 2.T7E-03 2.61 E-03

10. Iron-59 0.OOE-01 0.00E-01 1.16E-05 1.37E-04

11. Iodine-131 0.OOE-01 O.OOE-01 1.34E-05 1.33E-03

12. Iodine-132 0.OOE-01 0.00E-0 1 0.00E-01 1.16E-03

13. Iodine-133 0OME-Q1 0OME-01 0,00E-01 4.0.4E-05

14. Manganese-54 0.OOE-01 0.OOE-01 3.92E-04 1.33E-04

15. Sodium-24 0.OOE-01 O.OOE-01 1.04E-06 0.OOE-01

16. Niobium-95 O.OOE-01 0.OOE-0 I 1.35E-0.1 1.92E-04

17. Rubidium-86 GO.GE-01 0.OOE-01 0.OOE-01 1.81 E-05

18. Rubidium-88 0OOE-01 0.OOE-01 9.21E-04 0.OOE-01

19. Ruthenium-103 0.OOE-01 0.OOE-01 3.40E-06 9.83E-08

20. Antimony-124 0.OOE-01 O.OOE-01 2.05E-04 3.52E-03

21. Antimony-125 0.00E-01 0.OOE-01 3.67E-03 6.02E-03

22. Technetium-99M 0.00E-01 O.OOE-01 7.28E-06 6.18E-06

23. Tellurium-129M D,OOE-01 0.OOE-01 0.OOE-01 1.56E-04

24. Tellurium-1 32 0.OOE-01 QO.CE-0l 0.00E-01 8.79E-04

25. Zinc-65 0.OOE-01 0.OOE-01 9.87E-05 3.25E-06

26. Zinc-69M 0.OOE-01 0OOE-01 3.48E-05 0.OOE-01

27. Zirconium-95 0.OOE-01 QOGOE-Ol 1.09E-G4 1.26E-04 Total for Period O.OOE-01 O.OOE-01 4.94E-02 4.62E-02 E1-8

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2006 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 Unit 1st 1s2 S 2 Nuclide Tritium H-3 Ci 1.83E-01 1.04E-01 1.11E+03 3.1OE+02 Dissolved and Entrained Noble Gases

1. Argon-41 Ci O.OOE-01 O.OOE-01 8.84E-05 2.67E-05

2. Krypton-85 Ci O0,0E-01 O.OOE-01 4.02E-03 O.OOE-01

3. Krypton-85M Ci O.OOE-01 O.OOE-01 5.64E-04 1.56E-05

4. Krypton-88 Ci O.00E-01 O.OOE-01 1.83E-04 0.O0E-01

4. Xenon-1 33 Ci O.OOE-01 O.OOE-01 2.24E+00 1.91E-01

5. Xenon-133M Ci O.OOE-01 O.OOE-01 2.41E-02 1.43E-03

6. Xenon-135 Ci O.OOE-01 O.OOE-01 2.95E-02 1.62E-03 Total for Period Ci O.OOE-01 O.OOE-01 2.33E+00 2.04E-01 E1-9

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2006 LIQUID EFFLUENTS - TOTAL PLANT DISCHARGE G. Nuclide Summary (Note: Refer to Table A for ODCM nuclides reported as 0.O0E-01)

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

1. Silver-110M Ci 0.OOE-01 O.00E-01 4.25E-05 1.71E-04

2. Cerium-144 0.00E-01 O.00E-01 0.OOE-01 1.96E-05

3. Cobalt-57 Ci 0.00E-01 O.00E-01 2.85E-04 1.33E-04

4. Cobalt-58 Ci 0.00E-01 0.00E-01 1.74E-02 2.14E-02

5. Cobalt-60 Ci 0.OOE-01 0.OOE-01 1.18E-03 2.85E-03

6. Chromium-51 Ci 0.OOE-01 0.00E-01 0.00E-01 5.32E-03

7. Cesium-134 Ci 0.00E-01 0.00E-01 3.51E-05 1.53E-04

8. Cesium-137 Ci 0.OOE-01 0.00E-01 5.83E-05 2.80E-04

9. Cesium-138 Ci O.00E-01 0,OOE-01 2.60E-06 5.67E-06

10. Iron-55 Ci 0.OOE-01 0.OOE-01 1.92E-03 9.10E-03

11. Iron-59 Ci 0.00E-01 O.OOE-01 4.11E-05 2.90E-03

12. Manganese-54 Ci 0.OOE-01 0.OOE-01 1,23E-04 3,86E-04

13. Sodium-24 Ci 0.OOE-01 0.OOE-01 5.36E-06 0.00E-01

14. Niobium-95 Ci 0.OOE-01 0.QOE-01 9.69E-05 6.06E-04

15. Rubidium-86 Ci O.OOE-01 O.0QE-01 0.00E-01 2.35E-05

16. Antimony-124 Ci 0.00E-01 0.00E-01 3.19E-03 2.17E-03

17. Antimony-125 Ci 0.OOE-01 0.OOE-01 8.16E-03 1.32E-02

18. Yttrium-93 Ci 0.00E-01 0.OOE-01 2.99E-05 0.OOE-01

19. Zinc-65 Ci 0.OOE-01 0.OOE-01 0.00E-01 3.60E-06

20. Zirconium-95 Ci 0.OOE-01 0.OOE-01 2.63E-05 3.83E-04 Total for Period Ci 0.00E-01 O.OOE-01 3.26E-02 5.91 E-02 El-10

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2006 LIQUID EFFLUENTS - TOTAL PLANT DISCHARGE G. Nuclide Summary (Note: Refer to Table A for ODCM nuclides reported as Q.OOE-01)

Required by ODCM/Others Continuous Mode Batch Mode Quarter Quarter Quarter Quarter Unit 4 th 3r 4in Nuclide 3 rd H-3 Ci 1.71E-01 1.34E-01 3.77E+02 3.92E+02 Dissolved and Entrained Noble Gases

1. Argon-41 Ci O.QOE-01 O.OOE-01 O.OOE-01 1.72E-05

2. Xenon-133 Ci O.OOE-01 O.OOE-01 2.24E-03 6.34E-03

3. Xenon-133M Ci O.OOE-01 O.OOE-01 O.OOE-01 5.19E-05

4. Xenon-135 Ci O.OOE-01 O.OOE-01 3.38E-05 2.68E-04 Total for Period Ci O.OOE-01 O.OOE-01 2.28E-03 6.67E-03 El-11

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2006 TABLE A LIQUID "TYPICAL LLD" EVALUATION"1 )

Fit(2)

Nuclide 0DCM LLD 1 hr 8 hr 32 hr Manganese-54 5.OE-07 3.36E-08 3.36E-08 3.37E-08 Cobalt-58 5.OE-07 2.53E-08 2.54E-08 2.56E-08 Iron-59 5.0E-07 5.26E-08 5.29E-08 5.37E-08 Cobalt-60 5.OE-07 4.63E-08 4.63E-08 4.64E-08 Zinc-65 5.OE-07 2.95E-08 2.95E-08 2.96E-08 Molybdenum-99 5.OE-07 1.55E-07 1.67E-07 2.15E-07 Cesium-134 5.OE-07 1.91E-08 1.91E-08 1.92E-08 Cesium-137 5.OE-07 3.87E-08 3.87E-08 3.87E-08 Cerium-141 5.OE-07 2.80E-08 2.81 E-08 2.87E-08 Cerium-144 5.OE-06 1.11E-07 1.12E-07 1.12E-07 Iodine-131 1.0E-06 2.28E-08 2.34E-08 2.55E-08 Krypton-87 1.0E-05 1.16E-07 5.25E-07 (3)

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

Xenon-133 1.OE-O5 4.19E-08 4.36E-08 4.98E-08 Xenon-133m 1.0E-05 1.42E-07 1.55E-07 2.13E-07 Xenon-1 35 1i0E-05 2.06E-08 3.50E-08 2.17E-07 Xenon-1 38 1.0E-05 8.37E-06 (3) (3)

Nuclide ODCM LLD Typical LLD Tritium i.OE-05 1.2E-06 Gross Alpha 1.0E-07 2.OE-08 Strontium-89/90 5.OE-08 3.8E-08/1.4E-08 Iron-55 1.0E-06 1.3E-08 NOTES: (1) LLD values are in pLCi/ml, (2) flt is the time between sample collection and counting time.

(3) T 1/2 too short.

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EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2006 GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES (GROUND LEVEL RELEASES)

Summation of All 1 st 2._d 3._d 4th Releases Unit Qt.r tr Qtr Qtr %Error A. Noble Gases

1. Total Released Ci 8.66E+00 1.34E+02 3.63E+00 7.45E+00 11%

2. Average Release Rate of Period i.Ci/sec 1.11E+00 1.70E+01 4.56E-01 9.38E-01

3. Percent of Limit % * *

B. todines

1. Total Iodine-131 Ci 2.84E-06 1.19E-03 O.OOE-01 3.09E-06 13%

2. Average Release Rate for Period p.Ci/sec 3.65E-07 1.31 E-04 O.OOE-01 3.89E-07

3. Percent of Limit % .

C. Particulates

1. Particulates with half-lives >8 days Ci 2.23E-05 6.63E-06 O.00E-01 1.96E-05 16%

2. Average Release Rate for Period ,tCi/sec 2.87E-06 8.43E-06 O.OOE-01 2.47E-06

3. Percent of Limit

4. Gross Alpha Ci O.O0E-01 O.OOE-01 O.OOE-01 " O.OOE-01 Radio-activity D. Tritium

1. Total Release Ci 1.28E+01 3.98E+01 2.15+01 3.78E+01 15%

2. Average Release Rate for Period pCi/sec 1.64E+00 5,06E+00 2.71E+00 4.76E+00

3. Percent of Limit

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

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EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2006 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. Krypton-85M Ci O.OOE-01 O.OOE-01 O.OOE-01 4.26E-03

2. Xenon-1 33M Ci O.OOE-01 O.OOE-01 4.79E-03 1.09E-02

3. Xenon-1 35 Ci O.OOE-01 8.57E-01 4.20E-02 1.40E-01

4. Krypton-85 Ci 0.00E-01 0.OOE-01 4.06E-01 1.84E-01

5. Xenon-131M Ci Q.O0E-01 0.OOE-01 3.06E-02 8.38E-01

6. Argon-41 Ci 0.OOE-01 0.OOE-01 7.48E-01 2.00E+00

7. Xenon-1 33 Ci 4.42E+00 1.15E+02 3.01E+00 1.44E+01 Total for Period Ci 4.42E+00 1.16E+02 4.24E+00 1.76E+01

2. lodines Iodine-133 Ci 0.OOE-01 1.53E-04 0.OOE-01 O.OOE-01 Iodine-131 Ci 2.84E-06 1.03E-03 0.OOE-Oi o.OOE-01 Total for Period Ci 2.84E-06 1.19E-03 0.OOE-01 0.00E-01

3. Particulates

1. Cobalt-58 Ci 2.23E-05 6.63E-05 0.OOE-01 0.OOE-01 Total for Period Ci 2.23E-05 6.63E-05 0.OOE-01 0.OOE-01

4. Tritium Ci 1.20E+01 3.91E+01 7.75E-01 7.17E-01 Total for Period Ci 1.20E+01 3.91E+01 7.75E-01 7.17E-01 NOTE: Refer to Table B for ODCM nuclides reported as 0.OOE-01.

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EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT- .- :.

2006 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 3rd 4th 3rd 4th

1. Krypton-87 Ci 0.OOE-01 0.OOE-01 0.OOE-01 1.80E-03

2. Xenon-1 33M Ci 0.OOE-01 0.OOE-01 8.78E-03 1.27E-02

3. Krypton-85M Ci 0.00E-01 O.OOE-01 1.79E-03 1.86E-02

4. Xenon-1 35 Ci 0.OOE-01 0.OOE-01 9.76E-02 3.16E-01

5. Xenon-133 Ci 1.02E+00 0.00E-01 1.59E+00 2.41E+00

6. Argon-41 Ci 0.O0E-01 0.00E-01 9.04E-01 4.69E+00 Total for Period Ci 1.02E+00 O.00E-01 2.61 E+00 7.45E+00

2. lodines

1. Iodine-131 Ci O.OOE-01 3.09E-06 0.00E-01 0.OOE-01 Total for Period Ci 0.00E-01 3.09E-06 o.OOE-01 0.OOE-01

3. Particulates

1. Cobalt-58 Ci 0.OOE-01 1.78E-05 0.00E-01 1.81 E-06 Total for Period Ci 0.OOE-01 1.78E-05 0.OOE-01 1.81 E-06

4. Tritium Ci 2.03E+01 3.67E+01 1.22E+00 1.08E+00 Total for Period Ci 2.03E+01 3.67E+01 1.22E+00 1.08E+00 NOTE: Refer to Table B for ODCM nuclides reported as 0.OOE-01.

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EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2006 TABLE B GASEOUS "TYPICAL" LLD EVALUATIONW 1 )

Noble Gas f-It(2)

Nuclide ODCM LLD 1 hr 1.5 hr Krypton-87 1.OE-04 2.08E-06 2.73E-06 Krypton-88 1.OE-04 1.61 E-06 1.81 E-06 Xenon-133 1.OE-04 6.61 E-07 6.63E-07 Xenon-133m 1.OE-04 2.34E-06 2.35E-06 Xenon-135 1.OE-04 3.43E-07 3.56E-07 Xenon-138 1.OE-04 1.40E-04 6.10E-04 Particulate Sample 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.OE-10 5.62E-12 2.35E-13 3.46E-14 Iron-59 1.OE-10 1.20E-1 I 5.02E-13 7.49E-14 Cobalt-60 1.0E-10 1.07E-1 I 4.46E-13 6.38E-14 Zinc-65 1.iE-i0 6.71E-1 2 2.80E-13 4.03E-14 Molybdenum-99 1.0E-i0 3.43E-1 I 1.61E-12 4.70E-13 Cesium-134 1.0E-10 4.25E-12 1.77E-13 2.54E-14 Cesium-137 1.iE-10 8.48E-12 3.54E-13 5,05E-14 Cerium-141 1.iE-10 5.10E-12 2.15E-13 3.26E-14 Cerium-144 1.OE-10 2.01E-11 8.33E-13 1,20E-13 Iodine-131 1.OE-10 4.76E-12 2.07E-13 3.77E-14 Charcoal Sample Iodine-131 1.0E-11 7.25E-12 3.15E-13 5.74E-14 (1) LLD values are in p.Ci/ml.

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

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

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EFFLUENT AND WASTE DISPOSALANNUAL REPORT 2006 TABLE B GASEOUS "TYPICAL" LLD EVALUATIONW)

Nuclide 0DCM LLD Typical LLD Tritium 1.OE-06 1.OE-11 Gross Alpha 1.OE-11 1.5E-14 Strontium-89 1.OE-11 1.OE-14 Strontium-90 1.OE-11 1.OE-15 NOTES: (1)LLD values are in ptCi/cc.

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

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

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EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2006 SOLID WASTE (RADIOACTIVE SHIPMENTS)

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

1. Type of Waste Unit Period Error %

a. Spent Resins, Filter Sludges, Evaporator m3 2.21E+01 +1.OOE+00 Bottoms, etc. Ci 2.75E+02 +1.OOE+00

b. Dry Active Waste, Compressible Waste m3 1.57E+01 +1.00E+00 Contaminated Equipment, etc. Ci 1.26E+00 +5.OOE+00

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

d. Other: Mechanical Filters m3 3.41E+00 +1.00E+00 Ci 2.64E+01 +5.00E+00

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

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

Curies Percent

1. Hydrogen-3 2.05E-01 0.07

2. Carbon-14 8.61E-01 0.31

3. Beryllium-7 4.15E-01 0.15

4. Manganese-54 7.69E+00 2.80

5. Iron-55 2.64E+01 9.61

6. Cobalt-57 1.17E+00 0.43

7. Cobalt-58 1.49E+01 5.42

8. Nickel-59 1.31 E+00 0.48

9. Cobalt-60 6.97E+01 25.38

10. Nickel-63 1.26E+02 45.80

11. Zinc-65 8.66E-01 0.32

12. Strontium-89 8.05E-02 0.03

13. Strontium-90 9.52E-02 0.03

14. Technetium-99 3.83E-02 0.01 15 Silver-110m 5.63E-01 0.21

16. Antimony-125 9.02E-01 0.33

17. Cesium-134 5.93E+00 2.16

18. Cesium-137 1.73E+01 6.30

19. Cerium-144 3.84E-01 0.14

20. Plutonium-238 5.59E-04 0.00

21. Plutonium-239/240 2.78E-04 0.00

22. Plutonium-241 4.70E-02 0.02

23. Americium-241 2.94E-04 0.00

24. Curium-242 7.85E-05 0.00

25. Curium-243/244 1.27E-03 0.00 E1-18

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2006 SOLID WASTE (RADIOACTIVE SHIPMENTS)

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

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

Curies Percent

1. Chromium-51 3.30E-02 2.62

2. Manganese-54 3.68E-03 0.29

3. Iron-55 2.62E-01 20.79

4. Cobalt-57 2.95E-04 0.02

5. Cobalt-58 7.48E-02 5.92

6. Iron-59 1.31E-03 0.10

7. Cobalt-60 4.03E-01 31.95

8. Nickel-63 3.74E-01 29.62

9. Zinc-65 8.17E-04 0.07

10. Zirconium-95 4.44E-03 0.35

11. Niobium-95 7,76E-03 0.62

12. Silver-110m 4.46E-04 0.04

13. Tin-113 2.26E-04 0.02

14. Antimony-125 5.22E-03 0.41

15. Cesium-134 3.61E-03 0.29

16. Cesium-137 8.59E-02 6.80

17. Plutonium-238 1.69E-05 0.00

18. Plutonium-239/240 2.22E-05 0.00

19. Plutoniurn-241 1.OOE-03 0.08

20. Americium-241 2.07E-05 0.00

21. Curium-243/244 2.85E-05 0.00

c. Irradiated Components Curies Percent None N/A N/A E1-19

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2006

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

d. Other: Mechanical Filters Curies Percent

1. Carbon-14 3.66E-01 1.38

2. Manganese-54 3.08E-01 1.16

3. Iron-55 1.09E+01 41.20

4. Cobalt-57 2.11E-02 0.08

5. Cobalt-58 4.14E-02 0.16

6. Nickel-59 1.38E-02 0.05

7. Cobalt-60 5.98E+00 22.60

8. Nickel-63 1.37E+00 5.18

9. Zinc-65 3.17E-02 0.12

10. Technetium-99 1.83E-02 0.07

11. Silver-110m 2.57E-02 0.10

12. Antimony-125 3.31E-02 0.13

13. Cesium-134 2.27E+00 8.58

14. Cesium-137 5.06E+00 19.13

15. Cerium-144 6.67E-03 0.03

16. Plutonium-238 5.21E-05 0,00

17. Plutonium-239/240 1.18E-05 0.00

18. Plutonium-241 8.70E-03 0.03 19 Americium-241 2.65E-05 0.00

20. Curium-242 3.41E-05 0.00

21. Curium-243/244 3.08E-04 0.00 E 1-20

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2006 SOLID WASTE (RADIOACTIVE SHIPMENTS)

3. Solid Waste Disposition

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

Number of Shipments Type Quantity Mode of Transportation ___[

3 A-LSA II Motor Freiqht I C-

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

20 of the shipments were shipped by a waste processor.

c. Irradiated components, control rods, etc.

[ Number of Shipments I Type Quantity I Mode of Transportation I Destination

= None IN/A IN/A N/A

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

4. Irradiated Fuel Shipments (Disposition)

I Number of Shipments I Type NNDestination Quantity IMode of Transportation N None N/A N/A N/A

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

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EFFLUENT AND WASTE DISPOSA ANNUAL REPORT' 2006 Independent Spent Storage Installation SQN implemented use of an independent spent storage installation (ISFSI) on July13, 2004.

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

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

The 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 not to exceed 25 mrem/year Thyroid not to exceed 75 mrem/year Any other organ not to exceed 25 mrem/year The SQN ISFSI is considered part of the SQN site and part of plant operations and any radioactive release is included in this report as total site releases. These releases are within 40 CFR 190 limits and 10 CFR 72.104 limits.

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ENCLOSURE 2 RADIOLOGICAL IMPACT ASSESSMENT REPORT SEQUOYAH NUCLEAR PLANT JANUARY - DECEMBER 2006

INTRODUCTION Potential doses to maximum individuals and the population around Sequoyah Nuclear Plant (SQN) are calculated for each quarter as required in Section 5.2 of the Offsite Dose Calculation Manual (ODCM). Measured plant releases for the reporting period are used to estimate these doses. Dispersion of radioactive effluents in the environment is estimated using meteorological data and riverflow data measured during the period. In this report, the doses resulting from releases are described and compared to limits established for SQN.

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

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

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

- and -

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

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

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

The 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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. .*-. . *: . . *..: .j* .; ...

DOSE CALCULATIONS Estimated doses to the public are determined using computer models: Gaseous Effluent Licensing Code (GELC), and the Quarterly Water Dose Assessment Code (QWATA). These models are based on guidance provided by the NRC (in Regulatory Guides 1.109, 1.111 and 1.113) for determining the potential dose to individuals and populations living in the vicinity of the plant. The area around the plant is analyzed to determine the pathways through which the public may receive a dose. The doses calculated are a representation of the dose to a "maximum exposed individual." Some of the factors used in these calculations (such as ingestion rates) are maximum values. Many of these factors are obtained from NUREG/CR-1004. The values chosen will tend to overestimate the dose to this "maximum" person. The expected dose to actual individuals is lower. The calculated doses are presented in Tables 1 through 9.

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

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

MeteoroloqicalData 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 from the vertical temperature difference between two measurement levels.

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

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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 Dose Doses to organs due to releases of airborne effluents are estimated for the inhalation, ground contamination, and ingestion pathways. The ingestion pathway is further divided into four possible contributing pathways: ingestion of cow/goat milk, ingestion of beef, and ingestion of vegetables. Doses from applicable pathways are calculated for each real receptor location identified in the most recent land use survey. To determine the maximum organ dose, the doses from the pathways are summed for each receptor. For the ingestion dose, however, only those pathways that exist for each receptor are considered in the sum, i.e., milk ingestion doses are included only for locations where milk is consumed without commercial preparation and vegetable ingestion is included only for those locations where a garden is identified. To conservatively account for beef ingestion, a beef ingestion dose equal to that for the highest unrestricted area boundary location is added to each identified receptor. For ground contamination, the dose added to the organ dose being calculated is the total body dose calculated for that location, i.e., it is assumed that the dose to an individual organ is equal to the total body dose.

Doses from airborne effluents are presented in Tables 1 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 calculation are site specific use factors determined by TVA. The models that are used to estimate doses, as well as the parameters input to the models, are described in detail in the SQN ODCM.

Liquid Release Points and River Data Radioactivity concentrations in the Tennessee River are calculated assuming that releases in liquid effluents are continuous. Routine liquid releases from SQN, located at Tennessee River Mile 484, are made through diffusers which extend into the Tennessee River. It is assumed that releases to the river through these diffusers will initially be entrained in one-fifth of the water which flows past the plant. The QWATA code makes the assumption that this mixing condition holds true until the water is completely mixed at the first downstream dam, at Tennessee River Mile 471.0.

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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.

POPULATION DOSES Population doses for highest exposed organ due to airborne effluents are calculated for an estimated 1,060,000 persons living within a 50-mile radius of the plant site. Doses from external pathways and inhalation are based on the 50-mile human population distribution.

Ingestion population doses for total body and the maximum exposed organ due to liquid effluents are calculated for the entire downstream Tennessee River population. Water ingestion population doses are calculated using actual population figures for downstream public water supplies. Fish ingestion population doses are calculated assuming that all sport fish caught in the Tennessee River are consumed by the Tennessee River population.

Recreation population 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 15.5 mRlquarter at onsite (at or near the site boundary) stations and approximately 14.00 mR/quarter at offsite stations, or approximately 1.5 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 E2-4

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 public inside the unrestricted area boundary is performed for a hypothetical IVA 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 84 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 5.02 mrem. The doses due to radioactive effluents released to the atmosphere calculated in this report would not add a significant amount to this measured dose.

This dose is well below the 10 CFR 20 annual limit of 100 mrem.

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

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

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

Cumulative annual total doses are presented in Table 9.

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Table 1 Doses from Airborne Effluents First Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distance External Gamma Air 2.62E-03 mrad 5 mrad <1 SSW/1550 Beta Air 3.31E-03 mrad 10 mrad <1 SSW/1 550 Submersion Total Body 1.55E-03 mrad 10 mrad <1 SSW/1979 Skin 2.81E-03 mrad 10 mrad <1 SSW/1 979 Organ Doses Child/Thyroid 7.81 E-03 mrem 7.5 mrem <1 S/2254 Child/Total Body 7.79E-03 mrem 7.5 mrem <1 S/2254 Population Doses Total Body Dose 1.58E-02 man-rem Maximum Organ Dose (organ) 1.58E-02 man-rem (thyroid)

Populationdoses can be compared to the naturalbackground 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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..Kr*.! ~ V Table 2 Doses from Airborne Effluents Second Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distance External Gamma Air 1.67E-02 mrad 5 mrad <1 SSW/1550 Beta Air 3.82E-02 mrad 10 mrad <1 SSW/1 550 Submersion Total Body 9.78E-03 mrad 10 mrad <1 S/1585 Skin 2.09E-02 mrad 10 mrad <1 S/1585 Organ Doses Child/Thyroid 5.02E-02 mrem 7.5 mrem <1 S/2254 Child/Total Body 3.88E-02 mrem 7.5 mrem <1 S/2254 Population Doses Total Body Dose 6.16E-02 man-rem Maximum Organ Dose (organ) 8.03E-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 3 Doses from Airborne Effluents Third Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distance External Gamma Air 3.20E-03 mrad 5 mrad <1 S/1340 Beta Air 2.13E-03 mrad 10 mrad <1 S/1340 Submersion Total Body 2.17E-03 mrad 10 mrad <1 S/1585 Skin 3.43E-03 mrad 10 mrad <1 S/1585 Organ Doses I I _

Child/Thyroid 2.91 E-02 mrem 7.5 mrem <1 S/2254 Child/Total Body 2.91 E-02 mrem 7.5 mrem <1 S/2254 Population Doses Total Body Dose 2.77TE-02 man-rem Maximum Organ Dose (organ) 2.77E-02 man-rem (thyroid)

Population doses can be compared to the naturalbackground 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 1.90E-02 mrad 5 mrad <1 SSW/1 550 Beta Air 8.15E-03 mrad 10 mrad <1 SSW/1 550 Submersion Total Body 1.15E-02 mrad 10 mrad <1 SSW/1979 Skin 1.73E-02 mrad 10 mrad <1 SSW/1979 Organ Doses ....

Child/Thyroid 3.56E-02 mrem 7.5 mrem <1 S/2254 Child/Total Body 3.56E-02 mrem 7.5 mrem <1 S/2254 Population Doses Total Body Dose 6.20E-02 man-rem Maximum Organ Dose (organ) 6.21E-02 man-rem (thyroid)

Population doses can be compared to the naturalbackground 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 8.OOE-03 1.5 mrem < 1%

Body Child Liver 8.50E-03 5 mrem < 1%

Child Thyroid 7.90E-03 5 mrem < 1%

Average Riverflow past SQN (cubic feet per second): 27846 Population Doses Total Body Dose 5.20E-01 man-rem Maximum Organ Dose (organ) 5.20E-01 man-rem (Bone, GIT, Thyroid, Liver, Kidney, Lung))

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

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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 3.90E-03 1.5 mrem < 1%

Child GIT 4.1OE-03 5 mrem <1%

Child Thyroid 4.40E-03 5 mrem < 1%

Average Riverflow past SQN (cubic feet per second): 15,948 Population Doses Total Body Dose 2.60E-01 man-rem Maximum Organ Dose (organ) 2.70E-01 man-rem (Thyroid)

Population doses can be compared to the naturalbackground 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 3.30E-03 1.5 mrem <1%

Child GIT 3.40E-03 5 mrem <1%

Child Thyroid 3.30E-03 5 mrem <1%

Average Riverflow past SQN.(cubic feet per second): 23,066 Population Doses Total Body Dose 2.30E-01 man-rem Maximum Organ Dose (organ) 2.30E-01 man-rem (Bone, GIT, Thyroid, Liver, Kidney, Lung)

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

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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 2.50E-03 1.5 mrem <1 %

Child GIT 2.60E-03 5 mrem < 1%

Child Thyroid 2.40E-03 5 mrem < 1%

Average River flow past SQN (cubic feet per second): 33,463 Population Doses Total Body Dose 1.60E-01 man-rem Maximum Organ Dose (organ) 1.60E-01 man-rem (Bone,GIT, Thyroid, Liver, Kidney, Lung))

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

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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 1.55E-03 9.78E-03 2.17E-03 1.15E-02 Critical organ dose (air) 1.58E-02 6.16E-02 2.77E-02 6.20E-02 Total body dose (liquid) 8.00E-03 3.90E-03 3.30E-03 2.50E-03 Maximum organ dose 8.50E-03 4.10E-03 3.40E-03 2.60E-03 (liquid)

Direct Radiation Dose O.OOE-00 O.OOE-00 O.OOE-00 O.OOE-00 Total 3.39E-02 7.94E-02 3.66E-02 7.86E-02 Cumulative Total Dose (Total body or any other organ) mrem 2.29E-01 Annual Dose Limit (mrem) 25 Percent of Limit 0.92 Thyroid Dose (mre ) m Total body air submersion 1.55E-03 9.78E-03 2.17E-03 1 .15E-02 Thyroid dose (airborne) 7.81 E-03 5.02E-02 2.91E-02 3.56E-02 Total body dose (liquid) 8.OOE-03 3.90E-03 3.30E-03 2.50E-03 Thyroid dose (liquid) 7.90E-03 4.40E-03 3.30E-03 2.40E-03 Direct Radiation Dose O.OOE-00 O.OOE-00 O.OOE-00 O.OOE-00 Total 2.53E-02 6.83E-02 3.79E-02 5.20E-02 Cumulative Total Dose (Thyroid) mrem 1.84E-01 Annual Dose Limit (mrem) 75 Percent of Limit 0.25 E2-14

s'~':4S¶t Attachment 1.0 Joint Frequency Distribution Tables E2-A1-1

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, 2006 - MAR 31, 2006 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >-24 .5 TOTAL N 0.000 0.000 0.000 0.000 0.093 0.093 0.000 0.000 0.000 0.187 NNE 0.000 0.000 0.000 0.000 0.000 0.140 0.000 0.000 0.000 0.140 NE 0.000 0.000 0.000 0.000 0.000 0.140 0.000 0.000 0.000 0.140 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.197 0.000 0.000 0.000 0.000 0.137 SSW 0.000 0.000 0.000 0.000 0.933 0.653 0.000 0.000 0.000 1.546 SW 0.000 0.000 0.000 0.047 0.560 0.233 0.000 0.000 0.000 0.340 WSW 0.000 0.000 0.000 0.000 0.000 0. 110 0.000 0.000 0.000 0.140 W 0.000 0.000 0.000 0.000 0.047 0.093 0.000 0.000 0.000 0.140 WNW 0.000 0.000 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.09)

NW 0.000 0.000 0.000 0.000 0. 140 0.280 0.000 0.000 0.000 0.420 NNW 0.000 0.000 0.000 0.000 0.1H7 0.560 0.000 0.000 0.000 0.746 5.03TOTA[. 0.000 0.000 0,000 0.017 2.116 2.425 0.000 0.000 0.000

,4.61H TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2150 TOTAL HOURS OF STABILITY CLASS A 99 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 99 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2144 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:

2006/05/26 MEAN WIND SPEED - 7.84 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1-2

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 JAN 1, 2006 - MAP. 31, 2006 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 >-2 4.5 TOTAL N 0.000 0.000 0.000 0.000 0.137 0.187 0.000 0.000 0.000 0.373 NNlE 0.000 0.000 0.000 0.093 0.187 0.326 0.047 0.000 0.000 0.653 NE 0.000 0.000 0.000 0.093 0.140 0.137 0.000 0.000 0.000 0.420 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 o.o0o 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 0.047 0.000 0.000 0.000 0.000 0.047 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.093 SSW 0.000 0.000 0.000 0.093 0.560 0.2,0 0.000 0.000 0.000 0.933 SW 0.000 0.000 0.000 0.000 0.466 0.233 0.000 0.000 0.000 0.700 WSW 0 .000 0.000 0.000 0.000 0.017 0.047 0.000 0.000 0.000 0.093 W 0.000 0.000 0.000 0.000 0.047 0.093 0.000 0.000 0.000 0.140 WNW 0.000 0.000 0.000 0.000 0.0,17 0.017 0.000 0.000 0.000 0.093 NW 0.000 0.000 0.000 0.0,17 0.047 0.093 0.000 0.000 0.000 0.1*7 NNW 0.000 0.000 0.000 0.000 0.280 0. 140 0.000 0.000 0.000 0.420 S1 1TOT At. 0.000 0.000 0.000 0.326 2.052 1.726 0.0.17 0.000 0.000 4.15.

TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2150 TOTAL HOURS OF STABILITY CLASS B 49 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 49 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2144 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:

2006/05/26 MEAN WIND SPEED - 7.44 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1 -3

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<--l.5 C/00 M)

Seqcpoyah Nuclear Plant JAN 1, 2006 - MAR 31, 2006 WIND WIND SPEED(MNH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7,5-12.4 12,5-18.4 18.5-24.4 >-24.5 TOTAL N 0.000 0.000 0.000 0.093 0.140 0.093 0.000 0.000 0.000 0.326 NNE 0.000 0.000 0.000 0.233 0,326 0.233 0.047 0.000 0.000 0.840 NE 0.000 0.000 0.093 0,047 0.233 0.093 0.000 0.000 0.000 0.466 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 0.0.17 0.140 0.140 0.000 0.000 0.000 0.326 SSW 0.000 0.000 0.000 0.233 0.420 0.230 0.600 0.000 0.000 0.933 Sw 0.000 0.000 0.000 0.210 0.933 0.04t7 0.000 0.000 0.000 1.259 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 0.043 0.000 0.000 0.000 0.093 WNW 0.000 0.000 0.000 0.000 0.017 0. LH7 0.000 0.000 0.000 0.233 NW 0.000 0.000 0 .000 0.000 0.1,10 0.0417 0.000 0.000 0.000 0.147 NUW 0.000 0.000 0 .000 0.000 0.000 0. 140 0.000 0.000 0.000 0.140 SUBTnTAI. 0.000 0.000 0.093 0.913 2.379 1.353 0.047 0.000 0.000

4. H04 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2150 TOTAL HOURS OF STABILITY CLASS C 103 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 103 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 21414 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:

2006/05/26 MEAN WIND SPEED - 6.78 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1 -4

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

Sequoyah Nuclear PIant JAN 1, 2006 - MkR. 31, 2006 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 12.5-19.4 18.5-24.4 >-24 .5 TOTAL N 0.000 0.140 0.513 1.073 1.632 1.213 0.000 0.000 0.000 4.571 NNE 0.000 0.000 1.166 1.306 1.866 2.052 0.000 0.000 0.000 6.390 NE 0.000 0.093 1.073 0.700 0.653 0.093 0.000 0.000 0.000 2.612 ENE 0.000 0.047 0.140 0.000 0.000 0.000 0.000 0.000 0.000 0.187 0.000 0.000 0.140 0.093 0.000 0.000 0.000 0.000 0.000 0.233 ESE 0.000 0.000 0.093 0.047 0.000 0.000 0.000 0.000 0.000 0.140 SE 0.000 0.000 0.047 0.093 0.047 0.000 0.000 0.000 0.000 0.197 SSE 0.000 0.000 0.233 0.047 0.000 0.073 0.000 0.000 0.000 0.373 S 0.000 0.000 0.746 0.560 0.233 0.326 0.140 0.000 0.000 2.006 SSW 0.000 0.093 0.933 1 .632 0.466 0.700 0.000 0.000 0.000 3 .425 SW 0.000 0.000 0.606 1.026 0.933 0.1.47 0.000 0.000 0.000 2.752 WOW 0.o000 0.091 0.326 0. 1.47 0.047 0.000 0.000 0.000 0.000 0.6S3 W 0,000 0.000 0.240 0.,166 0.420 0.5i3 0.000 0.000 0.000 WNW 0.000 0.000 0. 147 0.466 0.420 0.606 0.000 0.000 0.000

1. 679 tWW 11W 0.000 0.0417 0.140 0.653 0.606 0.446 0.000 0.000 0.000 2.3 12 NNW 0.000 0.000 0 .3 713 0. 791 1.071 1.211 0.000 0.000 0.000 3.451 53 I6TOTA! 0.000 0.517 . ) C996 9. 1,142 9 .396 7. 112 0. i 110 0.000 0.000 3 3. 069 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2150 TOTAL HOURS OF STABILITY CLASS D 714 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 70)

TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 214,4 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 M-TER LEVEL DATE PRINTED:

2006/05/26 MEAN WIND SPEED - 5.58 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-Al-5

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

Sequoyah Nuclear Plant JAN 1, 2006 - MARk 31, 2006 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 12.5-13.4 13.5-24.4 >-24.5 TOTAL N 0.000 0.187 1.493 1.539 0.326 0.140 0.000 0.000 0.000 3.685 NNE 0.000 0.233 2.285 1.772 0.793 0.280 0.000 0.000 0.000 5.364 NE 0.000 0.093 0.373 0.280 0.000 0.000 0.000 0.000 0.000 0.746 ENE 0.000 0.093 0.047 0.047 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 0.093 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.187 SE 0.000 0.093 0.140 0.093 0.000 0.000 0.000 0.000 0.000 0.326 SSE 0.000 0.187 0.373 0.187 0.280 0.373 0.000 0.000 0.000 1.399 S 0.000 0.187 2.146 1.119 0.700 0.979 0.093 0.000 0.000 5.224 SSW 0.000 0.047 3.451 1.819 1.073 0.373 0.000 0.000 0.000 6.763 SW 0.000 0.140 2.492 1.772 0.653 0.093 0.000 0.000 0.000

.550 WSW 0.000 0.047 0 .. 10 0.466 0.373 0.*17 0.000 0.000 0.000 1 .912 W 0.000 0.047 0.420 0.231 0. 17 0. I17 0.000 0.000 0.000 1.073 WN11 0.000 0.093 0.466 0.420 0,047 0.000 0.000 0.000 0.000 1.026 NW 0.000 0.047 0 , 37"1 0.7,16 0.420 0, 1.7 0.000 0.000 0.000 1.772 NNW 0.000 0.1410 0 .,40 0.746 0.373 0,000 0.000 0.000 0.000 2.099 SUBTOTAL. 0.000 1.726 16.271 11.2,11 5.224 2.791 0.093 0.000 0.000

37. 360 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2150 TOTAL HOURS OF STABILITY CLASS E 802 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 801 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STAB:LITY OBSERVATIONS 2144 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Sequoyah Nucxear 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:

2006/05/26 MEAN WIND SPEED - 4.02 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1-6

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

Secuoyah Nuclear Plant JAN 1, 2006 - M.A3 31, 2006 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 19.5-24.4 >-24.5 TOTAL N 0.000 0.093 0.606 0.047 0.000 0.000 0.000 0.000 0.000 0.746 NNE 0.000 0.373 2.006 0.140 0.000 0.000 0.000 0.000 0.000 2.519 NE 0.000 0.280 0.979 0.047 0.000 0.000 0.000 0.000 0.000 1.306 ENE 0.000 0.047 0.233 0.000 0.000 0.000 0.000 0.000 0.000 0.280 E 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.093 ESE 0.000 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.093 SE 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.093 SSE 0.000 0.197 0.197 0.000 0.000 0.000 0.000 0.000 0.000 0.373 S 0.000 0.187 0.560 0.140 0.000 0.000 0.000 0.000 0.000 0,H6 SSW 0.000 0.047 1.493 0.326 0.047 0.047 0.000 0.000 0.000 1.959 SW 0.000 0.093 0.979 0.326 0.0,17 0.000 0.000 0.000 0.000 1.446 W2W 0.000 0.000 0.420 0.0,17 0.0-17 0.000 0.000 0.000 0.000 0.513 W 0.000 0.047 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.1-10 WNW 0,000 0.047 0. 140 0.000 0 .047 0.000 0.000 0.000 0.000 0.23]

NW 0.000 0.000 0.047 0.000 0.000 0.0.17 0.000 0.000 0.000 0.09)

NNW 0.000 0.000 0.097 0.047 0.047 0.000 0.000 0.000 0.000 0 .1 7

!;1DT OTA 1. 0.000 1 .5816 7. 929 1. 119 0.233 0.0)7 0.000 0.000 0.000 L0. 961 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2150 TOTAL HOURS OF STABILITY CLASS F 235 TOTAL IIOURIS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLA5S F 235 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2144 TOTAL HOURS CA L.M 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:

2006/05/26 MEAN WIND SPEED - 2.44 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1-7

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

Sequoyah Nuclear Plant JAN 1, 2006 - MAR 31, 2006 WIND WIND SPEED (MH)

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 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.093 NNE 0.000 0.373 0.979 0.187 0.000 0.000 0.000 0.000 0.000 1.539 NE 0.000 0.280 0.653 0.000 0.000 0.000 0.000 0.000 0.000 0.933 ENE 0.000 0.140 0.140 0.000 0.000 0.000 0.000 0.000 0.000 0.280 E 0.000 0.187 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.233 ESE 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 SE 0.000 0.140 0.047 0.000 0.000 0.000 0.000 0.000 0.000

0. l87 SSE 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 S 0.000 0.140 0.373 0.000 0.000 0.000 0.000 0.000 0.000 0.513 SSW 0.000 0.047 0 .326 0.000 0.000 0.000 0.000 0.000 0.000 0.373 SW 0 .000 0.140 0.466 0.093 0.000 0.000 0.000 0.000 0.000 0.700 W4W 0.000 0.000 0.047 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0 .047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 SUBTOTATr 0.000 1.632 3.1 25 0.210 0.000 0.000 0.000 0.000 0.000 5,037 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2150 TOTAL HOURS OF STABILITY CLASS G 10H TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 109 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2144 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:

2006/05/26 MEAN WIND SPEED - 1.95 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1-8

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

Sequoyah Nuclear PIant APR 1, 2006 - JUN 30, 2006 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 12.5-13.4 13.5-24.4 >-24 .5 TOTAL N 0.000 0.000 0.000 0.293 0.049 0.293 0.000 0.000 0.000 0.634 NNE 0.000 0.000 0.000 0.878 0.433 0.195 0.000 0.000 0.000 1.560 NE 0.000 0.000 0.000 0.780 0.330 0.244 0.000 0.000 0.000 1.414 ENE 0.000 0.000 0.000 0.293 0.043 0.000 0.000 0.000 0.000 0.341 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 0.044 0.000 0.000 0.000 0.000 0.000 0.000 0.049 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 0.098 0.146 0 .0 _3 0.000 0.000 0.000 0 .341 SSW 0.000 0.000 0.000 1.024 1.414 0.11) 0 .000 0.000 0.000 2.633 SW 0.000 0 .000 0.000 0.926 0.926 0 .24.) 0.000 0.000 0 .000 2.097 WSW 0 .000 0.000 0.000 0.195 0.293 0.2.4 0.000 0.000 0.000 0.731 W 0.000 0.000 0.000 0.000 0.244 0.3)0 0.000 0.000 0.000 0.6634 WN;W 0.000 0.000 0.000 0.000 0 .244 0.146 0.049 0.000 0.000 0.439 NW 0.000 0.000 0.000 0.000 0.146 0 .243 0.000 0.000 0.000 0.439 NNW 0.000 0.000 0.000 0.0,19 0.094 0.330 0.000 0.000 0.000 0.536 SUTOTAH1. 0.000 0.000 0.0,19 4153 .-1,.4136 2.730 0.0.19 0.000 0.000 TOTAL HOURS OF VALID STABILITY O0SERVATIONS 2092 TOTAL HOURS OF STABILITY CLAjS A 244 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 243 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2051 TOTAL HOURZ 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:

2006/03/07 MEAN WIND SPEED - 6.22 NOTE: TOTALS XND SUBTOTALS ARE OBTAINED FROM UNROUNDED NU`BBERS E2-A1 -9

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

Sequoyah Nuclear Plant APR 1, 2006 - JUN 30, 2006 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 12.5-19.4 13.5-24.4 >-24 .5 TOTAL N 0.000 0.000 0.000 0.146 0.098 0.000 0.000 0.000 0.000 0.244 NNE 0.000 0.000 0.000 0.439 0.244 0.049 0.000 0.000 0 .oqo 0.731 NE 0.000 0.000 0.099 0.293 0.049 0.000 0.000 0.000 0.000 0.439 ENE 0.000 0.000 0.000 0.195 0.000 0.000 0.000 0.000 0.000 0.195 E 0.000 0,000 0.000 0.049 0.000 0.000 0.000 0.000 0.000 0.049 ESE 0.000 0.000 0.000 0.049 0.000 0.000 0.000 0.000 0.000 0.049 SE 0.000 0.000 0.049 0.000 0.000 0.000 0.000 0.000 0.000 0.049 SSE 0.000 0.000 0.000 0.049 0.049 0.000 0.000 0.000 0.000 0.099 S 0.000 0.000 0.049 0.000 0.093 0.000 0.000 0.000 0,000 0.146 SSW 0.000 0.000 0.000 0.71 0.293 0.049 0.000 0.000 0.000 1.219 SW 0.000 0.000 0.000 0.634 0. L95 0.049 0.000 0.000 0.000 0.97A W1W (.(00 0.000 0.000 0.0a,; 0.000 0.049 0.000 0.000 0.00 0.09:'

W 0.000 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.000

0. 098 Wil 0.000 0.000 0.000 0.000 0.000 0.09i 0.000 0.000 0.000 0.09d NW 0.000 0.000 0.0419 0.099 0.049 0.000 0.000 0.000 0.000 0.195 NNW 0.000 0.000 0.0,19 0.0'19 0.000 0.09a 0.000 0.000 0.000

0. 195 SUBTO7TAT. 0.000 0.000 0.293 2.925 1.170 0.390 0.000 0.000 0.000 4 . 771 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2032 TOTAL HOURS OF STABILITY CLASS B 100 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 99 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2051 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Seq'ioyah 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:

2006/0q/07 MEAN WIND SPEED - 5.04 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-AI-10

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

Sequoyah Nuclear Plant A?-. 1, 2006 - JUN 30, 2006 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 12.5-13.4 18.5-24.4 >-24.5 TOTAL N 0.000 0.000 0.049 0.098 0.093 0.049 0.000 0.000 0.000 0.293 NNE 0.000 0.000 0.146 0.390 0.195 0.146 0.000 0.000 0.000 0.878 NE 0.000 0.000 0.390 0.293 0.049 0.049 0.000 0.000 0.000 0.780 ENE 0.000 0.000 0.146 0.098 0.000 0.000 0.000 0.000 0.000 0.244 E 0.000 0.000 0.098 0.049 0.000 0.000 0.000 0.000 0.000 0.146 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 0.049 0.000 0.000 0.000 0.000 0.000 0.049 SSE 0.000 0.000 0.049 0.000 0.049 0.000 0.000 0.000 0.000 0.098 S 0.000 0.000 0.049 0.293 0.000 0.049 0.000 0.000 0.000 0.390 SSW 0.000 0.000 0.244 0.926 0.091 0.04) 0.000 0.000 0.000 1.316 SW 0.000 0.000 0.146 0.439 0.244 0.000 0.000 0.000 0.000 0.H2)

W:;W 0.000 0.000 0. 146 0.001) 0 . 093 0.0(F C.000 0.000 0.000

0. 3.4i W 0.000 0.000 0.000 0.049 0.049 0.0119 C .049 0.000 0.000 0.195 WNW 0.000 0.000 0.000 0.000 0.049 0.000 0.000 0.000 0.000 0.0,19 NW 0.000 0.000 0.000 0.04 9 0.049 0.146 0.000 0.000 0.000

0. 244 NNW 0.000 0.000 0.0o0 0. 146 0.098 0.0,19 0.000 0.000 0.000 0 .213 SUIATOTAE. 0.000 0.000 1.463 2.925 1.073 0. A14 0.0-19 0.000 0.000

6. ,1 3 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2092 TOTAL HOURS OF STABILITY CLASS C 127 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 126 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 205:

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:

2006/08/07 MEAN WIND SPEED - 4.85 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1-11

JOINT PERCENTAGE F-EQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<--0.5 C/10o M)

Sequoyah Nuclear Plant AR 1, 2006 - JUN 30, 2006 WIND WIND SEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-13.4 13.5-24.4 >-24.5 TOTAL N 0.000 0.000 0.926 0.829 0.341 0.195 0.000 0.000 0.000 2.292 NNE 0.000 0.000 1.316 1.316 0.879 0.595 0.000 0.000 0.000 4.096 NE 0.000 0.049 0.878 0.341 0.195 0.000 0.000 0.000 0.000 1.463 ENE 0.000 0.000 0.390 0.000 0.000 0.000 0.000 0.000 0.000 0.390 E 0.000 0.000 0.195 0.000 0.000 0.000 0.000 0.000 0.000 0.195 ESE 0.000 0.000 0.146 0.049 0.000 0.000 0.000 0.000 0.000 0.195 SE 0.000 0.049 0.244 0.195 0.000 0.000 0.000 0.000 0.000 0.433 SSE 0.000 0.000 0.585 0.4,3 0.195 0.049 0.000 0.000 0.000 1.316 S 0.000 0.000 L.511 1.511 0.536 0.390 0.000 0.000 0.000 3.949 SSW 0.000 0.049 a.853 2.243 0.43) 0.000 0.000 0.000 0.000

4. S13 SW 0.000 0.000 1.301 0 .329 0.585 0.044 0.000 0.000 0.000 3.267 Wý:w 0.000 0.000 0.975 0.44A 0.146 0.049 0.000 0.000 0.000 W 0.000 0.049 0.244 0.2244- 0.093 0.244 0.000 0.000 0.000 0.373 WNW 0.000 0.000 0.093 0.019 0.09. 0.049 0.093 0.000 0.000 0.390 NW 0.000 0.000 0.049 0.293 0. 091 0.244 0.000 0.000 0.000 0.6.3 NNW 0.000 0.049 0 . 439 0.439 0.3,11 0.094 0.000 0.000 0.000 1.365 SIJqTOTA1, 0.000 0.2.14 11,653 9.313 3.949 1.950 0.094 0.000 0.000 27,206 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2092 TOTAL HOURS OF STABILITY CLASS 0 569 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS 0 558 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEID-STABILITY OBSERVATIONS 2051 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 KETER LEVEL DATE PRINTED:

2006/08/07 MEAN WIND SPEED - 4.21 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1-12

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, 2006 - JUN 30, 2006 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 19.5-24.4 >-24.5 TOTAL N 0.000 0.293 2.779 0.975 0.049 0.049 0.000 0.000 0.000 4.144 NNE 0.000 0.341 3.315 0.390 0.146 0.000 0.000 0.000 0.000 4.193 NE 0.000 0.293 0.975 0.195 0.000 0.000 0.000 0.000 0.000 1.463 ENZ 0.000 0.098 0,049 0,000 0.000 0.000 0.000 0.000 0.000 0.146 E 0.000 0.098 0.098 0.049 0.000 0.000 0.000 0.000 0.000 0.244 ESE 0.000 0.293 0.049 0.049 0.000 0.000 0.000 0.000 0.000 0.390 SE 0.000 0.000 0.146 0.146 0.000 0.000 0.000 0.000 0.000 0.293 SSE 0.000 0.244 0.488 0.093 0.000 0.000 0.000 0,000 0.000 0.829 S 0.000 0.293 2.04. 0.48*, 0. 195 0.000 0.000 0.000 0.000 3.023 SSW 0.000 0.146 3.852 1.073 0.099 0.000 0.000 0,000 0.000

5. 16.

SW 0.000 0 .244 3 .364 1.268 0.3')0 0.000 0.000 0.000 0.000 5.266 WSW 0.000 0.099 I .453 0.731 0.000 0.000 0.000 0.000 0.000

2. 6 2 W 0.000 0 .04 9 0.731 0 . 34 L 0.049 0.000 0.000 0.000 0.000 1.170 WNW 0.000 0.195 0 .4 39 0.049 0.000 0.000 0.000 0.000 0.000 0.6d3 NW 0.000 0.195 0.731 0.146 0.000 0 .049 0.000 0.000 0.000 1.121 NNW 0.000 0.390 1.706 0.390 0.0,19 0.000 0.000 0.000 0.000 2.535 S17TOTA1, 0.000 3.267 22.623 6.3q7 0.975 0.098 0.000 0.000 0.000 33.330 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2092 TOTAL HOURS OF STABILITY CLASS E 704 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 694 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2051 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:

2006/09/07 MEAN WIND SPEED - 2.75 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1-13

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

Secuoyah Nuclear Plant APR 1, 2006 - 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 12.5-13.4 13.5-24.4 >-24 .5 TOTAL N 0.009 0.146 2.292 0.000 0.000 0.000 0.000 0.000 0.000 2.447 NNE 0.011 0.341 2.730 0.000 0.000 0.000 0.000 0.000 0.000 3.083 NE 0.005 0.438 0.975 0.000 0.000 0.000 0.000 0.000 0.000 1.468 ENT 0.000 0.049 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.049 E 0.001 0.049 0.098 0.000 0.000 0.000 0.000 0.000 0.000 0.147 ESE 0.001 0.146 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.147 SE 0.001 0.146 0.146 0.000 0.000 0.000 0.000 0.000 0.000 0.294 SSE 0.001 0.049 0.195 0.000 0.000 0.000 0.000 0.000 0.000 0.245 S 0.002 0.098 0.390 0.049 0.000 0.000 0.000 0.000 0.000 0.53.

SSW 0.00., 0.291 1 .999 0.000 0.000 0.000 0.000 0.000 0.000 2 .300 SW 0.003 0.049 0..73 0 .244 0.093 0.000 0.000 0.000 0.000 1.271 WSW 0.002 0.195 6. 419 0.000 0.000 0.000 0.000 0.000 0.000 0.636 W 0.000 0.000 0 .049 0.000 0.049 0.000 0.000 0.000 0.000 0.091 WNW 0.001 0.09:8 0.195 0.000 0.000 0.000 0.000 0.000 0.000 0.294 NW 0.001 0.146 0. L46 0.000 0.000 0.000 0.000 0.000 0.000 0.294 NNW 0.002 0.000 0. 439 0.04 9 0.000 0.000 0.000 0.000 0.000 0.489 SUBTOTAl. 0.0,19 2.292 10.970 0.3.11 0.146 0.000 0.000 0.000 0.000 11.79t9 TOTAL HOURS OF VALID STABILITY OBSERVATIONO 2092 TOTAL HOURS OF STABILITY CLASS F 289 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 243 OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2051 TOTAL HOURS TOTAL HOURS CALM METEOROLOGICAL FACILITY: Seq'ioyah Nuclear PLant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL 2006/08/07 DATE PRINTED:

MEAN WIND SPEED - 2.10 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1-14

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

Sequoyah Nuclear Plant APR 1, 2006 - JUN 30, 2006 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 0.049 0.195 0.000 0.000 0.000 0.000 0.000 0.000 0.244 NNE 0.000 0.000 0.439 0.000 0.000 0.000 0.000 0.000 0.000 0.439 NE 0.000 0.146 0.146 0.000 0.000 0.000 0.000 0.000 0.000 0.293 ENE 0.000 0.049 0.098 0.000 0.000 0.000 0.000 0.000 0.000 0.146 E 0.000 0.049 0.049 0.000 0.000 0.000 0.000 0.000 0.000 0.098 ESE 0.000 0.049 0.049 0.000 0.000 0.000 0.000 0.000 0.000 0.098 SE 0.000 0.098 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.09.

SSE 0.000 0.293 0.146 0.000 0.000 0.000 0.000 0.000 0.000 0.439 S 0.000 0.09d 0.244 0.000 0.000 0.000 0.000 0.000 0.000 0.34, SSW 0.000 0.049 0.293 0.000 0.000 0.000 0.000 0.000 0.000 0.341 SW 0.000 0.000 0.146 0.000 0.000 0.000 0.000 0.000 0.000

0. 1 416 WSW 0.000 0.049 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0,19 W 0.000 0.000 0 .049 0.000 0.000 0.000 0.000 0.000 0.000 0.0419 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 0.049 0.000 0.000 0.000 0.000 0.000 0.000 0.049 NNW 0.000 0.000 0.049 0.000 0.000 0.000 0.000 0.000 0.000 0.0,19 SNLBTOTAI1 0.000 0.926 1.950 0.000 0.000 0.000 0.000 0.000 0.000 2 . H"17 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2092 TOTAL HOURS OF STABILITY CLASS C 59 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 59 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2051 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:

2006/08/07 MEAN WIND SPEED - 1.67 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1-15

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

Secuoyah Nuclear Plant JUL 1, 2006 - SE? 30, 2006 WIND WIND SEED(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 13.5-24.4 >-24.5 TOTAL N 0.000 0.000 0.000 0.276 0.092 0.000 0.000 0.000 0.000 0.368 NNE 0.000 0.000 0.000 0.414 0.506 0.138 0.000 0.000 0.000 1.058 NE 0.000 0.000 0.000 0.552 0.230 0.092 0.000 0.000 0.000 0.874 ENE 0. 000 0.000 0.046 0.092 0.000 0.000 0.000 0.000 0.000 0.138 r 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 S 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.092 SSW 0 .000 0.000 0.046 1.657 0.414 0.046 0.000 0.000 0.000 2.163 SW 0.000 0.000 0.092 1.150 0.230 0.000 0.000 0.000 0.000 1.473 WSW 0,000 0.000 0.000 0.1361 0.138 0.000 0.000 0.000 0.000 0.506 W 0.000 0.000 0.000 0.000 0.138 0.000 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 0.046 0. 13 0.046 0.000 0.000 0.000 0.230 NNW 0.000 0.000 0 .046 0.13H 0.046 0.000 0.000 0.000 0.000 0.230 SUB1TOTALr 0.000 0.000 0 .230 4 . 786 1 .179 0.322 0.000 0.000 0.000 7.317 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 21q5 TOTAL HOURS OF STABILITY CLASS A 159 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 159 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 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:

2006/11/14 MEAN WIND SPEED - 5.17 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NL"MBERS E2-A1-16

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

Sequoyah Nuclear Plant JUL 1, 2006 - SE? 30, 2006 WIND WIND SPEED(MPM)

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 13.5-24.4 >=24 .5 TOTAL N 0.000 0.000 0.046 0.046 0.046 0.000 0.000 0.000 0.000 0.138 NNE 0.000 0.000 0.138 0.823 0.184 0.046 0.000 0.000 0.000 1.197 NE 0.000 0.000 0.230 0.460 0.046 0.000 0.000 0.000 0.000 0.736 ENE 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.092 E 0.000 0.000 0.138 0.000 0.000 0.000 0.000 0.000 0.000 0.138 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 0.046 0.000 0,000 0.000 0.000 0.000 0.046 SSE 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.092 S 0.000 0.000 0.000 0.414 0.092 0.000 0.000 0.000 0.000 0.506 SSW 0.000 0.000 0.046 0.598 0.092 0.000 0.000 0.000 0.000 0.736 SW 0.000 0.000 0.322 0.552 0.032 0.000 0.000 0.000 0.000

0. 166 WSW 0.000 0.000 0.184 0.092 0.000 0.000 0.000 0.000 0.000 0.276 W 0.000 0.000 0.092 0.092 0.000 0.000 0.000 0.000 0.000 0 . 184 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 0.046 0.092 0.046 0.000 0.000 0,000 0.000 0.184 SIUBTOTAL. 0.000 0.000 1.282) 3.313 0.6.1,l 0.0,16 0.000 0.000 0.000

5. 292 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2115 TOTAL HOURS OF STABILITY CLASS B TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 115 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 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:

2006/11/14 MEAN WIND SPEED - 4.34 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1-17

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 JU L 1, 2006 - SEP 30, 2006 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 12.5-13.4 13.5-24.4 >-24.5 TOTAL N 0.000 0.000 0.046 0.230 0.046 0.000 0.000 0.000 0.000 0.322 NNE 0.000 0.000 0.230 0.690 0.322 0.046 0.000 0.000 0.000 1 .289 NE 0.000 0.000 0.460 0.644 0.092 0.000 0.000 0.000 0.000 1.197 ENE 0.000 0.000 0.000 0.133 0.000 0.000 0.000 0.000 0.000 0.133 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 0.046 0.138 0.000 0.000 0.000 0.000 0.000 0.184 SE 0.000 0.000 0.092 0.092 0.000 0.000 0.000 0.000 0.000 0.134 SSE 0.000 0.000 0.046 0.092 0.000 0.000 0.000 0.000 0.000 0.133 S 0.000 0.000 0.184 0.690 0.046 0.000 0.000 0.000 0.000 0.920 SSW 0.000 0.000 0. 1H.1 0.732 0.000 0.000 0.000 0.000 0.000 0.966 SW 0.000 0.000 0.6614 0.230 0.000 0.000 0.000 0.000 0.000 0.874 WSW 0.000 0.000 0.230 0.000 0 .000 0.000 0.000 0.000 0.000 0.230 W 0.000 0.000 0.046 0.000 0.046 0.000 0.000 0.000 0.000 0.092 WNW 0.000 0.000 0.000 0.000 0.000 0.04 6 0.000 0.000 0.000 0.046 NW 0.000 0.0.00 0,000 0.000 0.000 0.046 0.000 0.000 0.000 0.016 NNW 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 STIDTOTAI1 0.000 0.000 2.209 3.72, 0.591 1.t1 0.000 0.000 0.000 6.673 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2135 TOTAL HOURS OF STABILITY CLASS C 146 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 145 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 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:

2006/11/14 MEAN WIND SPEED - 4.08 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1-18

7m".' ,

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND D:RZCTION FOR STABILITY CLASS D (-1.5< DELTA T<--0.5 C/1DO M)

Sequoyah Nuclear Plant JUL 1, 2006 - SEP 30, 2006

. WIND WIND SPEED (M2H)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-13.4 18.5-24.4 >-24 .5 TOTAL N 0.000 0.092 1.473 1.104 0.368 0.046 0.000 0.000 0.000 3.083 NNE 0 .000 0.000 1.897 2.393 1.197 0.133 0.000 0.000 0.000 5.614 NE 0.000 0.000 1.197 0.920 0.184 0.046 0.000 0.000 0.000 2.347 ENE 0.000 0.046 0.920 0.138 0.000 0.000 0.000 0.000 0.000 1.104 E 0.000 0.046 0.414 0.184 0.000 0.000 0.000 0.000 0.000 0.644 ESE 0.000 0.000 0.230 0.092 0.000 0.000 0.000 0.000 0.000 0.322 SE 0.000 0.000 0.782 0.322 0.046 0.000 0.000 0.000 0.000 1.150 SSE 0 .000 0.000 0.966 0.732 0.092 0.000 0.000 0.000 0.000 1.841 S 0.000 0.092 2.945 2.669 0.644 0.046 0.000 0.000 0.000 6.397 SSW 0.000 0 .000 2.339 2.715 0.363 0.046 0.300 0.000 0.000 6.029 SW 0.000 0.092 1.243 0. 641 0.111 0.000 0.000 0.000 0.000

2. 117 WSW 0.000 0.092 0.552 0o. 1.1 0.133 0.016 0.000 0.000 0.000 1.012 W 0.000 0.000 0.414 0.092 0.0.16 0.0-16 0.00 0.000 0.000 0.593 WNW 0.000 0.000 0.046 0.0016 0.0416 0.000 0.300 0.000 0.000

0. 134 NW 0.000 0.0,16 0.276 0.0,16 0.046 0.016 0.300 0.000 0.000 0.460 NNW 0.000 0.000 0.276 0.134 0.230 0.046 0.000 0.000 0.000 0.690 SUDTOTAI. 0.000 0.506 16.521 12.171 3.5,13 0.506 0.000 0.000 0.000 311. 541 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2135 TOTAL HOURS OF STABILITY CLASS D 733 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 723 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STAILITY OBSERVATIONS 2173 TOTAL HOURS CAL 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:

2006/11/14 MEAN WIND SPEED - 3.63 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUIJMERS E2-A1-19

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, 2006 - SEP 30, 2006 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 0.644 4.924 1.058 0.092 0.000 0.000 0.000 0.000 6.719 NNE 0.000 0.690 3.359 0.736 0.046 0.000 0.000 0.000 0.000 4.832 NE 0.000 0.230 0.736 0.000 0.000 0.000 0.000 0.000 0.000 0.966 ENE 0.000 0.092 0.230 0.092 0.000 0.000 0.000 0.000 0.000 0.414 E 0.000 0.276 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.368 ESE 0.000 0.322 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.368 SE 0.000 0.276 0.368 0.000 0.000 0.000 0.000 0.000 0.000 0.644 SSE 0.000 0.184 0.828 0.184 0.046 0.000 0.000 0.000 0.000 1.243 S 0.000 0.322 2.209 0.644 0.322 0.000 0.000 0.000 0.000 3 .497 SSW 0.000 0. 1 4 3.221 0.12. 0.003 0.000 0.000 0.000 0.000 4.234 SW 0.000 0.230 2.333 0.4L4 0.003 0.000 0.000 0.000 0.000 3.037 WSW 0.000 0 . 184 1.101 0. I84 0.000 0.000 0.000 0.000 0.000 L.473 W 0.000 0.13I 1.335 0.000 0.000 0.000 0.000 0.000 0.000 1.473 WNW 0.000 0.230 0 .736 0 . I38 0.000 0.000 0.000 0.000 0.000

. 104 NW 0.000 0.276 1.101 0.230 0.131 0.000 0.000 0.000 0.000 NNW 0.000 0.368 1.611 0.4 14 0.000 0.000 0.000 0.000 0.000 2.393 OUBTOTAL 0.000 4.644 2.1.252 4.970 0.6,14 0.000 0.000 0.000 0.000 34.514 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2185 TOTAL HlOURS OF STABILITY CLASS E 757 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 750 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVAT:ONS 2173 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:

2006/11/14 MEAN WIND SPEED - 2.48 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-Al -20

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

Sequoyah Nuclear Plant JUL 1, 2006 - SEP 30, 2006 WIND WIND SPEEOD(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-13.4 13.5-24.4 >-24 .5 TOTAL N 0.000 0.552 3.083 0.184 0.000 0.000 0.000 0.000 0.000 3.920 NNE 0.060 0.828 2.715 0.000 0.000 0.000 0.000 0.000 0.000 3.543 NE 0.000 0.368 0.230 0.000 0.000 0.000 0.000 0.000 0.000 0.598 ENE 0.000 0.133 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.184 E 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.092 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.092 SSE 0.000 0.230 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.276 S 0.000 0.046 0.322 0.000 0.000 0.000 0.000 0.000 0.000 0.36, SSW 0.000 0 .092 0.322 0.000 0.000 0.000 0.000 0.000 0.000 0.414 SW 0.000 0 .000 0.230 0.046 0.000 0.000 0.000 0.000 0.000 0.276 WSW 0.000 0 .046 0.1144 0.000 0.000 0.000 0.000 0.000 0.000 0.230 W 0.000 0.092 0. 1 14 0.000 0.000 0.000 0.000 0.000 0.000 0.276 WNW 0.000 0.0,16 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.13d NW 0.000 0.0,16 0.414 0.092 0.000 0.000 0.000 0.000 0.000 0 .552 NNW 0.000 0.092 0.966 0.046 0.000 0.000 0.000 0.000 0.000 1.104 SUBTOTAL. 0.000 2.761 4.790 0.414 0.000 0.000 0.000 0.000 0.000 11 .965 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 215 TOTAL HOURS OF STABILITY CLASS F 260 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STA1ILITY CLASS F 260 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 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:

2006/11/14 MEAN WIND SPEED - 1.97 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1-21

Y-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, 2C06 - SE? 30, 2006 WIND WIND SPEED (.M?)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-13.4 13.5-24.4 >-24.5 TOTAL N 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.092 NNE 0.000 0.000 0.276 0.000 0.000 0.000 0.000 0.000 0.000 0.276 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 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 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.092 S 0.000 0.046 0.138 0.000 0.000 0.000 0.000 0.000 0.000 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 w

0.000 o.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 0.009 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 SUBTOTAr, 0.000 0.18.1 0.5(6 0.000 0.000 0.000 0.000 0.001 0.000 0 . 09O TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2193 TOTAL HOURS OF STABILITY CLASS G 15 15 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 TOTAL HOURS CA LM 0 METEOROLOGICAL FACILITY: Seqpioyah 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:

2006/11/14 MEAN WIND SPEED - 1.65 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1-22

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

Sequoyah Nuclear Plant OCT 1, 2006 - DEC 31, 2006 WIND WIND SEED(MPNI 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 19.5-24.4 >-24.5 TOTAL N 0.000 0.000 0.000 0.046 0.137 0.183 0.000 0.000 0.000 0.365 NNE 0.000 0.000 0.000 0.046 0.365 0.640 0.000 0.000 0.000 1.051 NE 0.000 0.000 0.000 0.137 0.183 0.091 0.000 0.000 0.000 0.411 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0 .000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0 .000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.228 0.365 0.000 0.000 0.000 0.000 0.5514 SW 0.000 0.000 0. Ili 3 0.224 0.0-16 0.046 0.000 0.000 0.000 0.501 w' W 0.000 0.000 0.000 0.046 0.000 0.03' 0 .000 0.000 0.000 0.1317 W 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.0.16 WNW 0.000 0.000 0 .000 0.1143 0.137 0.091 0.000 0.000 0.000 0.411 NW 0.000 0.000 0.000 0.0,16 0.183 0.113 0 .000 0.000 0.000 0.,111 NNW 0.000 0.000 0.000 0.0116 0.091 0.000 0.000 0.000 0.000 0.117 StIrýTOTA), 0.000 0.000 0.181I .00( I.501* 1.370 0.000 0.000 0.000

.1.066 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 21.3 TOTAL HOURS OF STABILITY CLASS A 89 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 93 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2183 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Secpioyah 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:

2007/01/25 MEAN)WIND SPEED - 6.50 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NULoI(BRS E2-A1-23

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

Sequoyah Nuclear Plant OCT 1, 2006 - DEC 31, 2006 WIND WIND SEED (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 13.5-24.4 >-2 4. 5 TOTAL N 0.000 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.091 NNE 0.000 0.000 0.046 0.411 0.365 0.183 0.000 0.000 0.000 1.005 NE 0.000 0.000 0.091 0.137 0.137 0.137 0.000 0.000 0.000 0.503 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Z 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.046 0.137 0.046 0.000 0.000 0.000 0.000 0.223 SW 0.000 0.000 0 .137 0.01) 0.22s 0.000 0.000 0.000 0.000 0.457 WSW 0.000 0.000 0.0,16 0.0,16 0.000 0.000 0.000 0.000 0.000 0.091 W 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 WNW 0.000 0.000 0.000 0.000 0.046 0.091 0.000 0.000 0.000 0.137 NW 0.000 0.000 0.000 0.000 0.22. 0.000 0.000 0.000 0.000 0.22H NNW 0.000 0.000 0.000 0.000 0.137 0.000 0.000 0.000 0.000 0.137

!(.TI3TTA1. 0.000 0.000 0.111 0.H22 1.233 0.457 0.000 0.000 0.000 2.924 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2149 TOTAL HOURS OF STABILITY CLASS B 64 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 64 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2139 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:

2007/01/25 MEAN WIND SPEED - 5.85 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUZIMERS E2-A1-24

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

Sequoyah Nuclear Plant OCT 1, 2006 - DEC 31, 2006 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 12.5-19.4 18.5-24.4 >-24 .5 TOTAL N 0.000 0.000 0.000 0.183 0.000 0.091 0.000 0.000 0.000 0.274 NNE 0.000 0.000 0.274 0.137 0.365 0.320 0.000 0.000 0.000 1.096 NE 0.000 0.000 0.274 0.274 0.320 0.091 0.000 0.000 0.000 0.959 ENE 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.091 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.046 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 0.046 o.000 0.000 0.000 0.000 0.000 0.046 SSW 0.000 0.000 0.137 0.457 0.046 0.000 0.000 0.000 0 .000 0.640 SW 0.000 0.000 0.143 0.594 0.091 0.046 0.000 0.000 0.000

0. 914 WSW 0.000 0.000 0.137 0.091 0.000 0.000 0.0,16 0.000 0.000 0.274 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.091 WNW 0.000 0.000 0.000 0.000 0.0,16 0.000 0.000 0.000 0.000 0.046 NW 0.000 0.000 0.046 O.000 0.000 0.183 0.000 0.000 0.000 0.22H N4W 0.000 0.000 0.0.16 0.137 0.046 0.046 0.000 0.000 0.000 0.27.1 SUBTOTAI. 0.000 0.000 1.279 2.010 0.914 0.777 0.0,46 0.001 0.000 5.025 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2189 TOTAL HOURS OF STABILITY CLASS C 110 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 110 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 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:

2007/01/25 MEAN WIND SPEED - 5.21 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1-25

7 -~ ~ .'..V.. V~~? -~

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, 2006 - DEC 31, 2006 WIND WIND SPEED (MPH4)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-19.4 18.5-24.4 >-24 .5 TOTAL N 0.000 0.046 0.640 1.051 1.736 0.731 0.000 0.000 0.000 4.203 NNE 0.000 0.137 1.553 2.376 1.919 0.959 0.000 0.000 0.000, 6.944 NE 0.000 0.000 1.782 0.914 0.549 0.046 0.000 0.000 0.000 3.299 ENZ 0.000 0.137 0.548 0.137 0.000 0.000 0.000 0.000 0.000 0.822 E 0.000 0.183 0.320 0.046 0.000 0.000 0.000. 0.000 0.000 0.543 ESZ 0.000 0.046 0.365 0.000 0.000 0.000 0.000 0.000 0.000 0.411 SE 0.000 0.046 0.411 0.046 0.046 0.000 0.000 0.000 0.000 0.54.

SSE 0.000 0.046 0.320 0.046 0.000 0.000 0.000 0.000 0.000 0.411 S 0.000 0.091 0.411 0.594 0.274 0.320 0.046 0.000 0.000 1.736 SSW 0.000 0 .137 1.279 1 .593 0.503 0.0016 0.000 0.000 0.000 3.563 SW 0.000 0.091 1.005 0.731 0.137 0.457 0.0-16 0.000 0.000 2.467 WSW 0.000 0 .046 0.365 0.137 0.365 0.046 0.000 0.000 0.000

0. *53 W 0.000 0.0416 0.1137 0.320 0.223 0.000 0.000 0.000 0.000 0 .731 WN;W 0.000 0.000 0.193 0.183 0.091 0.046 0.000 0.000 0.000 0.503 NW 0.000 0.091 0.22H 0.959 0.457 0.221 0.000 0.000 0.000

.964 NNW 0.000 0.000 0.640 0.731 1.233 0.457 0.000 0.000 0.000 3.061 Si;l:T(7AT, 0.000 1.14,? 10.147 9.9461 7.531 3.3I5 0.09i 0.000 0.000

]2. 161 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 21H9 TOTAL HOURS OF STABILITY CLASS D 7041 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 704 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 21*9 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Seq'ioyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AIND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED:

2007/01/25 MEAN WIND SPEED - 4.54 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1-26

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STA3ILITY CLASS E (-0.5< DELTA T<- 1.5 C/100 M)

Sequoyah Nuclear Plant OCT 1, 2006 - DEC 31, 2006 wlID WIND SPEED (MH)

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 0.457 2.741 1.142 0.320 0.091 0.000 0.000 0.000 4.751 NNE 0.000 0.365 4.340 2.193 0.365 0.09i 0.000 0.000 0.000 7.355 NE 0.000 0.411 1.233 0.228 0.046 0.000 0.000 0.000 0.000 1.919 ENE 0.000 0.228 0.193 0.000 0.000 0.000 0.000 0.000 0.000 0.411 E 0.000 0.228 0.137 0.000 0.000 0.000 0.000 0.000 0.000 0.365 ESE 0.000 0.046 0.183 0.000 0.000 0.000 0.000 0.000 0.000 0.228 SE 0.000 0.091 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.137 SSE 0.000 0.223 0.411 0.046 0.228 0.091 0.000 0.000 0.000 1.005 S 0.000 0.091 1 . tal. 0.320 0.183 0.457 0.046 0.000 0.000

2. 2H4 SEW 0.000 0.274 2 .214 0.59-1 0.031 0.000 0.000 0.000 0.020 3.213 SW 0.000 0.183 1 .16-1 0.777 0.091 0.137 0.091 0.000 0.000 3.242 WU;W 0 .000 0.1 3 1.005 0 .271 0.0-16 0.000 0.000 0.000 0.003 W1 0.000 0. 183 0.320 0.221 0.091 0.000 0.000 0.000 0.000 WNW 0.000 0.228 0.274' 0 .228 0.137 0.0,16 0.000 0.000 0.000 NW 0.000 0.183 0.503 0 .365 0.091 0.000 0.000 0.000 0.000 NNW 0.000 0.320 1.325 0.365 0. 137 0.000 0.000 0.000 0.000 2.1,17 S;URTOTAl, 0.000 3.700 1 8. I I6 r. 76 1 1 .827 0. 91 ., 0. 137 0.000 0.0,n) 3 1 .,1/iVG TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2189 TOTAL HOURS OF STAB:LITY CLASS E 689 TOTAL HOIURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 689 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2189 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SequoyahNuclear 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:

2007/01/25 MEAN WIND SPEED - 3.02 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1-27

JOINT PERCENTAGE FP.EQUENCIES OF WIND SPEED BY W:ND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<- 4.0 C/100 M)

Seq'oyah NucLear Plant OCT 1, 2006 - DEC 31, 2006 WIND WIND SPEED(MH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-13.4 19.5-24.4 >-24 .5 TOTAL N 0.005 0.137 1.690 0.046 0.000 0.000 0.000 0.000 0.000 1.878 NNE 0.017 0.777 5.208 0.223 0.000 0.000 0.000 0.000 0.000 6.229 NE 0.007 0.548 1.873 0.223 0.000 0.000 0.000 0.000 0.000 2.656 ENE 0.001 0.365 0.137 0.000 0.000 0.000 0.000 0.000 0.000 0 .504 E 0.001 0.223 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.275 ESE 0.001 0 .457 0.000 0.000 0.000 3.000 0.000 0.000 0.000 0.455 SE 0.000 0.137 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.137 SSE 0.002 0.320 0.274 0.000 0.000 0.000 0.000 0.000 0.000 0.596 S 0.002 0.411 0 .320 0.000 0.000 0.000 0.000 0.000 0.000 0.733 SSW 0.002 0. 137 0.685 0.046 0.000 0.300 0.000 0.000 o .*7oI 0.00(1 0.1-3 0.731 0.000 0.000 0.000 0 .000 0.000 0.000 0 .00t 0.0146 0 .274 0 .000 0.000 0.000 0.000 0 .000 0.000 1.21 W 0 .OOL o .u00 0.365 0.000 c .000 0.000 0.0116 0.000 0.000 0.412 WNW 0.001 0 .01L 0.27,1 0 . .116 0.000 3.000 0.000 0.000 0.000 0.412 NW 0 .0o1 0.0,16 0.27,1 0.01'1 0.000 0.000 0.000 0.000 0.000 NNW 0.001 0.0.16 0.457 0.000 0.300 0.000 0.000 0.000 0.000 0.504

!O;rTOTAr, 0.0.16 3 .91)1 12. . 0.71 i. 0.000 000 0.1000 0.000 0.000 1 "I. j111, TOTAL HOURS OF VALID STABILITY OBSERVATIONS; 2113 TOTAL HOURS OF STABILITY CLAZS F 37 )

TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 373 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2143 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: Seq'ioyah 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:

2007/01/25 MEAN WIND SPEED - 2.01 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NZi.SERS E2-A1 -28

JOINT PERCENTAGE FRZQUENCIES OF WIND SPEED BY WIND D:RECT:ON FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

Sequoyah Nuclear Plant OCT 1, 2006 - 0EC 31, 2006 WIND W-ND SPEED (MP?)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.1-12.4 12.5-36.4 13.5-24.4 >-24 .5 TOTAL N 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 NNE 0.000 0.320 1.096 0.046 0.000 ý0.000 0.000 0.000 0.000 1.462 NE 0.000 0.503 1.827 0.046 0.000 0.000 0.000 0.000 0.000 2.376 ENIE 0.000 0.046 0.000 0.000 0.000 0.000 C .000 0.000 0.000 0.046 E 0.000 0.137 0.046 0.000 0.000 0.000 0.000 0,000 0.000 0.183 ESE 0.000 0.046 0.000 0.000 0.000 0.000 0 .000 0.000 0.000 0.046 SE 0.000 0.411 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.457 SSE 0.000 0.411 0,046 0.000 0.000 0,000 0.000 0.000 0.000 0.457 S 0.000 0.274 0.274 0.000 0.000 0.000 0.000 0.000 0.000 O. 54.'

0.000 0.143 0.365 0.000 0.000 C.000 0.000 0.000 0.000

0. 5.11 0.000 0.[37 0. 03 o .oo 0.000 0.000 0.000 0.000 0.000 0.6.101 W.W 0.000 0.0.16 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0.16

() .000 0.000 0.0.16 0.000 0.000 0.000 0 .000 0.000 0.000 WN1 OW 0.000 0.000 0.000 0 . ()o()( 0.000 0.000 0.000 0.000 0.000

0. 000 0.000 0 .04", 0.000 0 .o0o0o 0.000 0.000 0.000 0.000 0.000 0.04,6 NNW 0.00(0 0 .0,16 0.0,16 0.o00o 0.000 0.000 _.000 0.000 0.000 0.091

.10,7(1TAI, 0.1000 2.60.1 .1.3,10 0.0)1 11.000 0.000 0.0100 0.000 0.000

7. o I 5 TOTAL HOORS OF VALID STABILITY OOF.R';AT1ONS 2111 TOTAL HOURS. OF STABILITY CLASS 0 154 TOTAL HOURS OF VALID WIND DIRECTIoO-W:ND SPEED-STAB1LETY CLASS G 154 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 214)

TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: Seq'oyah 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:

2007/01/25 MEAN WIND SPEED - 1.62 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A1 -29

Attachment 2.0 Deviations from ODCM Controls/Surveillance Requirements Date ODCM Description of Deviation Requiremen Jan 31,2006 1/2 1.1 Radiation monitor 0-RM-90-212 was inoperable. The ODCM action Table 1.1-1 31 requires sampling once /24 hours when the secondary coolant Item 2.b is less than 0.01 pCi/g Dose Equivalent 1-131, however the Action 31. surveillance procedure required a sampling frequency of once/12 hours. The sample was collected 14 hours1.62037e-4 days 0.00389 hours 2.314815e-5 weeks 5.327e-6 months and 45 minutes late.

PER 96150 E2-A2-1

ML071370320

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