Text

Annual Radioactive Effluent Release Report for 2011
	ML121220250
Person / Time
Site:	Sequoyah
Issue date:	04/30/2012
From:	James Shea; Tennessee Valley Authority
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	Download: ML121220250 (71)
	v • d • e

Tennessee Valley Authority, 1101 Market Street, Chattanooga, Tennessee 37402 April 30, 2012 10 CFR 50.4 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D. C. 20555-0001 Sequoyah Nuclear Plant, Units 1 and 2 Facility Operating License Nos. DPR-77 and DPR-79 NRC Docket Nos. 50-327 and 50-328

Subject:

Annual Radioactive Effluent Release Report - 2011 Enclosed is the subject Annual Radioactive Effluent Release Report (ARERR) for the period of January 1 to December 31, 2011. This report (Enclosure 1) is being submitted as required by the respective Sequoyah Nuclear Plant (SQN), Units 1 and 2, Technical Specification 6.9.1.8, which specifies that the report be submitted prior to May 1st of each year.

A Radiological Impact Assessment is being submitted for the same reporting period in accordance with Section 5.2 of the SQN Offsite Dose Calculation Manual. The assessment is provided in Enclosure 2.

There are no regulatory commitments in this submittal. If you have any questions concerning this matter, please telephone Rusty Proffitt at (423) 843-6651.

Resp 6f~ Ily, J.-F hea M rn&er, Corporate Nuclear Licensing

Enclosures:

1.

Annual Radioactive Effluent Release Report, Sequoyah Nuclear Plant, 2011

2.

Radiological Impact Assessment Report, Sequoyah Nuclear Plant, 2011 cc (Enclosures):

NRC Regional Administrator - Region II NRC Senior Resident Inspector - Sequoyah Nuclear Plant Printed on recycled paper ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT SEQUOYAH NUCLEAR PLANT 2011 EI-I

2011 SEQUOYAH NUCLEAR PLANT (SQN)

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT REGULATORY LIMITS A. Gaseous Effluents

1.

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

a. Noble gases:

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

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

b. Iodine-131 (1-13 1), Iodine-133 (1-133), tritium, and all radionuclides in particulate form with half-lives greater than eight days:

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

2.

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

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

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

3.

Dose to a member of the public from Iodine-131, Iodine-133, tritium, and radionuclides in particulate form with half-lives greater than eight days in gaseous effluents released to areas at and beyond the unrestricted area boundary shall be limited to the following:

a. Less than or equal 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 I1.

The annual average concentration of radioactivity released in liquid effluents to unrestricted areas shall be limited to the concentrations specified in Title 10 of the Code of Federal Regulations (CFR), Part 20 (Standards for Protection Against Radiation), Appendix B, Table 2, Column 2, for radionuclides other than dissolved or entrained noble gases. For dissolved or entrained noble gases, the concentration shall be limited to 2.OE-04 microcuries/milliliter (ýtCi/ml) total activity.

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2.

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

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

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

II.

EFFLUENT CONCENTRATION LIMITS A. Liquids

1. The Effluent Concentration Limits (ECL) for liquids are those listed in 10 CFR 20, Appendix B, Table 2, Column 2. For dissolved and entrained gases, the ECL of 2.OE-04 pVCi/ml is applied. This ECL is based on the Xenon-135 (Xe-135) concentration in air (submersion dose) converted to an equivalent concentration in water as discussed in the International Commission on Radiological Protection (ICRP), Publication 2.

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

B.

Gaseous

1. The maximum permissible dose rates for gaseous releases are defined in the 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.

III.

AVERAGE ENERGY SQN'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.

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IV.

MEASUREMENTS AND APPROXIMATIONS OF TOTAL RADIOACTIVITY NOTE:

Every effort is made to ensure that effluent releases from SQN are conducted such that the ODCM Lower Limit of Detection (LLD) values are met. Whenever an analysis does not identify a radioisotope, a value of "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. Iodines 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 the sampling period.

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

The total particulate and iodine activity released for the month is then determined by summing all activity released from the shield and auxiliary building exhausts for the sampling periods.

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C. Carbon-14 in Gaseous Releases The Carbon-14 production and effluent source term estimates were based on Electric Power Institute methodology provided in EPRI Report 1021106, "Estimation of Carbon-14 in Nuclear Power Plant Gaseous Effluents," December 2010. It was determined that 19.8 curies of Carbon-14 is generated annually at SQN. However, only 98 percent is considered released as gas and only the carbon dioxide form (20 percent) of that is used in the gaseous dose calculations.

D. 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.

There were no changes made to the radioactive waste systems and/or the Process Control Program (PCP) for this calendar year Continuous Releases and Periodic Continuous Releases (Condensate regenerants, turbine building sump, and steam generator blowdown)

Total gamma isotopic activity and tritium concentrations are determined monthly on one composite sample each from the condensate system, and the turbine building sump. The tritium value is applied to releases over the month. Total gamma isotopic activity concentration for Units 1 and 2 steam generator blowdown is determined daily. In addition to ODCM Table 2.2-1, tritium concentrations are determined daily, averaged for the month, and applied to releases over the month. The total activity of the continuous release is determined by summing each nuclide's concentration and multiplying by the total volume discharged.

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Monitoring Wells SQN started conducting an investigation of tritium releases to the groundwater in 2003 due to identification of tritium in one of the on-site monitoring wells. This study involved pressure testing of the radwaste discharge line, installation and sampling of groundwater wells, visual inspection under the refueling water storage tanks (RWSTs) and inspection of drain lines. In addition to the one on-site Radiological Environmental Monitoring Program (REMP) groundwater monitoring well, SQN also has 18 non-REMP monitoring wells to support monitoring the onsite groundwater plume and for the presence or increase of radioactivity. These wells are sampled periodically for tritium. The tritium concentrations obtained in 2011 from these non-REMP wells are listed below. Initial and follow up analyses for the semi-annual sampling procedure indicated no gamma activity or Hard to Detect nuclides.

Well ID Date Activity in pCi/L Date Activity in pCi/L Well-24 4/22/2011

<270 07/15/2011 N/A Well-24 11/04/2011 N/A 12/21/2011

<239 Well-29 4/22/2011 364 07/15/2011 N/A Well-29 11/04/2011 521 12/21/2011

<239 Well-31 4/22/2011 6716 07/15/2011 6732 Well-31 11/04/2011 4775 12/21/2011 5689 GP-7A 4/22/2011

<270 07/15/2011 N/A GP-7A 11/04/2011 N/A 12/21/2011 287 GP-13 4/22/2011 5896 07/15/2011 5308 GP-13 11/04/2011 5244 12/21/2011 4618 GP-24 4/22/2011

<270 07/15/2011 N/A GP-24 11/04/2011 284 12/21/2011 N/A W-10 4/22/2011 N/A 07/15/2011 N/A W-10 11/04/2011 22760 12/21/2011 22922 E1-6

Doses from 1-131 Water Inaestion Pathway The REMP requirements as specified in Table 3.12-1 from NUREG 1301, "Offsite Dose Calculation Manual Guidance: Standard Radiological Effluent Controls for Pressurized Water Reactors," dated April 1991, requires an 1-131 specific analysis for drinking water pathway samples if the annual dose from 1-131 is greater than 1 mrem.

In order to evaluate the need for implementation of this additional analysis, the drinking water pathway dose from 1-131 to the maximum organ and age group was calculated.

The results reported here confirm that the drinking water pathway dose from 1-131 was less than the 1 mrem limit and that the performance of the 1-131 specific analysis is not required for SQN REMP drinking water samples.

Quarter 1

2 3

4 Totals 1-131 Ci 0.OOE+01 0.OOE+01 0.OOE+01 O.OOE+01 0.00E+01 Infant/Thyroid (mrem) 0.OOE+01 0.00E+01 0.OOE+01 0.OOE+01 0.OOE+01 Population/Thyroid 0.OOE+01 O.OOE+01 0.OOE+01 0.OOE+01 0.OOE+01 (mrem)

I I

There was no detectable 1-131 released via this pathway during this reporting period.

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V. BATCH RELEASES Value

1. Liquid (Radwaste only) 1 st Half 2nd Half Units

a. Number of releases 72 66 Each

b. Total time period of releases 21751.00 11247.00 Minutes

c. Maximum time period of release 6540 248.00 Minutes

d. Average time period of releases 302.10 170.41 Minutes

e.

Minimum time period of release 90.00 15.00 Minutes

f. Average dilution stream flow during release periods 38,373.0 36,276.0 CFS

2. Gaseous (Batches only - containment purges, and waste gas decay tanks)

a. Number of releases 60 62 Each

b. Total time period of releases 35885.00 38429.00 Minutes

c. Maximum time period of release 1860.00 954.00 Minutes

d. Average time period of releases 598.08 619.82 Minutes

e. Minimum time period of release 26.00 29.00 Minutes VI. ABNORMAL RELEASES Value

1. LiquidI st Half 2nd Half Units

a. Number of releases 0

0

b. Total activity released 0.OOE-01 0.OOE-01 Ci

2. Gaseous 1st Half 2nd Half Units

a. Number of releases 0

0

b. Total activity released 0.OOE-01 0.OOE-01 Ci El-8

Liquid Effluents-Summation of Releases During the Period Starting: 1-Jan-2011 Ending: 30-Jun-2011 Est.

Total Quarter 2 Error Type Of Effluent Units Quarter 1 A. Fission & Activation Products

1. Total Release (Not Including Tritium, Gases, Alpha)

Ci 1.52E-03 4.01E-03 18%

2. Average Diluted Concentration During Period jICi/ml 8.80E-10 2.1OE-09

3. Percent Of Applicable Limit B. Tritium

1. Total Release Ci 3.66E+02 3.52E+02 18%

2. Average Diluted Concentration During Period jICi/ml 2.12E-04 1.84E-04

3. Percent Of Applicable Limit C. Dissolved And Entrained Gases

1. Total Release Ci 1.96E-04 8.35E-04 39%

2. Average Diluted Concentration During Period ptCi/ml 1.13E-10 4.38E-10

3. Percent Of Applicable Limit 5.67E-04 2A19E-04 D. Gross Alpha Radioactivity

1. Total Release Curies 0.00E+01**

0.OOE+01 N/A***

E. Total Waste Volume Released Liters 5.8 1E+07 4.8 1E+07 4%

(Pre-Dilution)

F. Volume Of Dilution Water Used G. Radwaste Volume Released Liters Liters 1.67E+09 1.27E+06 1.86E+09 2.18E+06 4%

N/A Applicable Limits are expressed in terms of dose. See Tables 5-8 of the 2011 Radiological Impact Assessment Report.

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

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

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Liquid Effluents-Summation of Releases During the Period Starting: 1-Jul-20 11 Ending: 31-Dec-20 11 Est.

Total Quarter 4 Error Type Of Effluent Units Quarter 3 A. Fission & Activation Products

1. Total Release (Not Including Tritium, Gases, Alpha)

Ci 6.92E-03 2,65E-03 18%

2. Average Diluted Concentration During Period iiCi/ml 3.50E-09 1.47E-09

3. Percent Of Applicable Limit B. Tritium

1. Total Release Ci 3.65E+02 1.48E+02 18%

2. Average Diluted Concentration During Period jtCi/ml 1.85E-04 8.23E-05

3. Percent Of Applicable Limit C. Dissolved And Entrained Gases

1. Total Release Ci 1.26E-04 6.62E-06 39%

2. Average Diluted Concentration During Period jiCi/ml 6.37E-1 1 3.68E-12

3. Percent Of Applicable Limit 3.19E-05 1.84E-06 D. Gross Alpha Radioactivity

1. Total Release Curies 0.OOE+01**

0.OOE+01 N/A***

E. Total Waste Volume Released Liters 6.72E+07 5.85E+07 4%

(Pre-Dilution)

F. Volume Of Dilution Water Used G. Radwaste Volume Released Liters Liters 1.91E+09 2.09E+06 1.74E+09 1.32E+06 4%

N/A Applicable Limits are expressed in terms of dose. See Tables 5-8 of the 2011 Radiological Impact Assessment Report.

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

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

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Curies Released in Liquid Effluents During the period Starting: 1-Jan-20 11 Ending 31 -Mar-20 11 Continuous Batch Total Tritium 1.25E-01 3.66E+02 3.66E+02 FISSION & ACTIVATION PRODUCTS Cobalt-58 0.OOE+01 4.46E-04 4.46E-04 Cobalt-60 0.OOE+01 2.40E-04 2.40E-04 Cesium-134 0.OOE+01 1.57E-06 1.57E-06 Cesium-137 0.OOE+01 9.61E-08 9.61E-08 Iron-55 0.00E+01 1.60E-04 1.60E-04 Manganese-54 0.OOE+01 4.01E-06 4.01E-06 Sodium-24 0.OOE+01 1.74E-06 1.74E-06 Antimony-124 0.OOE+01 2.80E-04 2.80E-04 Antimony-125 0.OOE+01 3.80E-04 3.80E-04 Zinc-65 0.OOE+01 5.12E-06 5.12E-06 TOTALS 0.OOE+01 1.52E-03 1.52E-03 DISSOLVED AND ENTRAINED GASES Krypton-87 0.OOE+01 3.05E-06 3.05E-06 Xenon-133 0.OOE+01 1.90E-04 1.90E-04 Xenon-135 0.OOE+01 3.57E-06 3.57E-06 TOTALS 0.OOE+01 1.96E-04 1.96E-04

Zeroes indicate that no activity was present at detectable levels.

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Curies Released in Liquid Effluents During the period Starting: 1-Apr-2011 Ending 30-Jun-2011 Continuous Batch Total Tritium 9.17E-02 3.52E+02 3.52E+02 FISSION & ACTIVATION PRODUCTS Cobalt-57 0.OOE+01 1.31E-06 1.31E-06 Cobalt-58 0.OOE+01 2.84E-03 2.84E-03 Cobalt-60 0.OOE+01 6.28E-04 6.28E-04 Cesium-134 0.OOE+01 1.30E-06 1.30E-06 Cesium-137 O.OOE+01 3.75E-07 3.75E-07 Iron-55 0.OOE+01 4.58E-04 4.58E-04 Manganese-54 0.OOE+01 1.88E-05 1.88E-05 Niobium-95 0.OOE+01 1.37E-05 1.37E-05 Antimony-124 0.OOE+01 5.34E-06 5.34E-06 Antimony-125 0.OOE+01 3.83E-05 3.83E-05 Zirconium-95 0.OOE+01 4.30E-06 4.30E-06 TOTALS 0.OOE+01 4.01E-03 4.01E-03 DISSOLVED AND ENTRAINED GASES Xenon-133 0.OOE+01 8.26E-04 8.26E-04 Xenon-135 0.OOE+01 9.53E-06 9.53E-06 TOTALS 0.OOE+01 8.35E-04 8.35E-04

Zeroes indicate that no activity was present at detectable levels.

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Curies Released in Liquid Effluents During the period Starting: 1-Jul-2011 Ending 30-Sep-2011 Continuous Batch Total Tritium 1.39E-01 3.65E+02 3.65E+02 FISSION & ACTIVATION PRODUCTS Cobalt-58 0.OOE+01 6.25E-03 6.25E-03 Cobalt-60 0.OOE+01 5.07E-04 5.07E-04 Cesium-134 0.OOE+01 1.91E-06 1.91E-06 Iron-55 0.OOE+01 1.47E-04 1.47E-04 Antimony-125 O.OOE+01 1.52E-05 1.52E-05 TOTALS 0.OOE+01 6.92E-03 6.92E-03 DISSOLVED AND ENTRAINED GASES Krypton-85M O.OOE+01 1.25E-06 1.25E-06 Xenon-133 O.OOE+01 1.24E-04 1.24E-04 TOTALS O.OOE+01 1.26E-04 1.26E-04

Zeroes indicate that no activity was present at detectable levels.

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Curies Released in Liquid Effluents During the period Starting: 1-Oct-20 11 Ending 31-Dec-20 11 Continuous Batch Total Tritium 1.46E-01 1.48E+02 1.48E+02 FISSION & ACTIVATION PRODUCTS Cobalt-57 0.OOE+01 1.73E-05 1.73E-05 Cobalt-58 0.OOE+01 1.67E-03 1.67E-03 Cobalt-60 0.OOE+01 3.66E-04 3.66E-04 Cesium-137 0.OOE+01 1.06E-05 1.06E-05 Iron-55 0.OOE+01 2.08E-04 2.08E-04 Antimony-124 0.OOE+01 3.82E-05 3.82E-05 Antimony-125 0.OOE+01 3.42E-04

.3.42E-04 TOTALS 0.OOE+01 2.65E-03 2.65E-03 DISSOLVED AND ENTRAINED GASES Xenon-133 O.OOE+01 6.62E-06 6.62E-06 TOTALS 0.OOE+01 6.62E-06 6.62E-06

Zeroes indicate that no activity was present at detectable levels.

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TABLE A LIQUID "TYPICAL LLD" EVALUATION()

Nuclide Manganese-54 Cobalt-58 Iron-59 Cobalt-60 Zinc-65 Molybdenum-99 Cesium-134 Cesium-137 Cerium-141 Cerium-144 Iodine-131 Krypton-87 Krypton-88 Xenon-133 Xenon-133 m Xenon-135 Xenon-138 ODCM LLD 5.OE-07 5.OE-07 5.OE-07 5.OE-07 5.OE-07 5.OE-07 5.OE-07 5.OE-07 5.OE-07 5.OE-06 1.OE-06 1.OE-05 1.OE-05 1.OE-05 1.OE-05 1.OE-05 1.OE-05 1 hr 3.36E-08 2.53E-08 5.26E-08 4.63E-08 2.95E-08 1.55E-07 1.91E-08 3.87E-08 2.80E-08 1.11 E-07 2.28E-08 1.16E-07 9.95E-08 4.19E-08 1.42E-07 2.06E-08 8.37E-06 At(2) 8hr 3.36E-08 2.54E-08 5.29E-08 4.63E-08 2.95E-08 1.67E-07 1.9 IE-08 3.87E-08 2.8 1E-08 1.12E-07 2.34E-08 5.25E-07 5.49E-07 4.36E-08 1.55E-07 3.50E-08 (3) 32 hr 3.37E-08 2.56E-08 5.37E-08 4.64E-08 2.96E-08 2.15E-07 1.92E-08 3.87E-08 2.87E-08

1. 12E-07 2.55E-08 (3)

(3) 4.98E-08 2.13E-07 2.17E-07 (3)

Nuclide ODCM LLD Tritium 1.OE-05 Gross Alpha 1.OE-07 Strontium-89/90 5.OE-08 Iron-55 1.OE-06 NOTES: (1) LLD values are in laCi/ml.

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

(3) T 1/2/2 too short.

Typical LLD 1.2E-06 2.0E-08 3.8E-08/1.4E-08 1.3E-08 El-15

Gaseous Effluents - Summation of Releases During the Period Starting: 1-Jan-2011 Ending: 30-Jun-2011 Type of Effluent Units Quarter 1 Quarter 2 Estimated Total Error A. Fission and Activation Products

1. Total Release Ci 6.74E-01 1.70E+00 11%

2. Average Release Rate For Period

ýtCi/sec 8.67E-02 2.2 1E-01

3. Percent of Applicable Limit B. Radioiodines

1. Total Iodine-131 Ci 2.22E-07 0.00+00 13%

2. Average Release Rate For Period jtCi/sec 2.86E-08 0.00+00

3. Percent of Applicable Limit C. Particulates

1. Particulates (Half-Lives > 8 Days)

Ci 1.22E-06 4.26E-07 16%

2. Average Release Rate For Period ptCi/sec 1.56E-07 5.41E-08

3. Percent of Applicable Limit

4. Gross Alpha Radioactiviy Ci 0.OOE+01 0.OOE+01 D. Tritium

1. Total Release Ci 4.68E+00 7.96E+00 15%

2. Average Release Rate For Period jiCi/sec 6.01E-01 1.O1E+00

3. Percent of Applicable Limit E. Carbon-14

1. Total Release Ci 5.71E+00 4.57E+00 N/A

2. Average Release Rate For Period jtCi/sec 7.34E-01 5.81E-01

3. Percent of Applicable Limit Applicable Limits are expressed in terms of dose. See Tables 1-4 of the 2011 Radiological Impact Assessment Report.

Zeroes indicate that no radioactivity was present at detectable levels.

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

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Gaseous Effluents - Summation of Releases During the Period Starting: 1-Jul-2011 Ending: 31-Dec2011 Type of Effluent Units Quarter 3 Quarter 4 Estimated Total Error A. Fission and Activation Products

1. Total Release Ci 4.73E-01 2.97E-01 11%

2. Average Release Rate For Period gCi/sec 5.95E-02 3.74E-02

3. Percent of Applicable Limit B. Radioiodines

1. Total Iodine-131 Ci 0.OOE+01 0.OOE+01 N/A***

2. Average Release Rate For Period

[tCi/sec 0.OOE+01 0.OOE+01

3. Percent of Applicable Limit C. Particulates

1. Particulates (Half-Lives > 8 Days)

Ci 1.28E-06 O.OOE+00 16%

2. Average Release Rate For Period RCi/sec 1.61E-07 0.OOE+00

3. Percent of Applicable Limit

4. Gross Alpha Radioactiviy Ci 0.OOE+01 O.OOE+01 D. Tritium

1. Total Release Ci 2.24E+00 8.65E+00 15%

2. Average Release Rate For Period gCi/sec 2.8 1E-01 1.09E+00

3. Percent of Applicable Limit E. Carbon-14

1. Total Release Ci 5.61E+00 5.87E+00 N/A

2. Average Release Rate For Period pCi/sec 7.06E-01 7.38E-01

3. Percent of Applicable Limit Applicable Limits are expressed in terms of dose. See Tables 1-4 of the 2011 Radiological Impact Assessment Report.

Zeroes indicate that no radioactivity was present at detectable levels.

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

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Curies released Gaseous Ground Level Releases During the period Starting: 1 -Jan-20 11 Ending: 31-Mar-20 11 FISSION GASES Xenon-133 Xenon-13 5 Argon-41 TOTALS CONTINUOUS O.OOE+01 O.OOE+O 1 O.OOE+O 1 O.OOE+01 BATCH 9.98E-02 8.49E-03 5.66E-01 6.74E-0 I TOTAL 9.98E-02 8.49E-03 5.66E-0 1 6.74E-0 I IODINES Iodine-131 TOTALS 2.22E-07 2.22E-07 O.OOE+01 O.OOE+O I 2.22E-07 2.22E-07 PARTICULATES Cobalt-60 TOTALS TRITIUM 1.22E-06 1.22E-06 O.OOE+01 O.OOE+01 1.22E-06 1.22E-06 Tritium 4.40E+00 2.77E-01 4.68E+00 CARBON-14 Carbon-14 (CO2 form)

Carbon-14 (Total) 1.12E+00 5.7 1E+00 0.00E+00 O.OOE+00 1.12E+00 5.7 1E+00

Zeros indicate that no radioactivity was present at detectable levels.

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Curies released Gaseous Ground Level Releases During the period Starting: 1-Apr-2011 Ending: 30-Jun-2011 FISSION GASES Xenon-133 Xenon-135 Argon-41 TOTALS CONTINUOUS O.OOE+01 O.OOE+O 1 O.OOE+01 O.OOE+01 BATCH 1.50E-01 1.74E-03 1.59E+00 1.74E+00 TOTAL 1.50E-01 1.74E-03 1.59E+00 1.74E+00 IODINES TOTALS 0.00E+01 O.OOE+01 0.00E+0 1 PARTICULATES Colbalt-60 TOTALS TRITIUM 4.26E-07 4.26E-07 O.OOE+01 0.00E+01 4.26E-07 4.26E-07 Tritium 6.82E+00 1.14E+00 7.96E+00 CARBON-14 Carbon-14 (CO 2 form)

Carbon-14 (Total) 8.95E-01 4.57E+00 O.OOE+O0 O.OOE+O0 8.95E-0 1 4.57E+00

Zeros indicate that no radioactivity was present at detectable levels.

El-19

Curies released Gaseous Ground Level Releases During the period Starting: 1-July-2011 Ending: 30-Sep-2011 FISSION GASES Xenon-131M Xenon-133 Xenon-135 Argon-41 TOTALS IODINES TOTALS PARTICULATES Cobalt-60 TOTALS TRITIUM Tritium CONTINUOUS O.OOE+O 1 O.OOE+01 O.OOE+01 O.OOE+01 O.OOE+01 BATCH 2.77E-03 5.4 1E-02 4.36E-03 4.11E-01 4.73E-01 TOTAL 2.77E-03 5.41E-02 4.36E-03 4.1,1E-01 4.73E-01 O.OOE+01 O.OOE+01 O.OOE+01 1.28E-06 1.28E-06 O.OOE+01 O.OOE+01 1.28E-06 1.28E-06 1.97E+00 2.64E-0 1 2.23E+00 CARBON-14 Carbon-14 (C02 form) 1.1OE+00 O.OOE+00 Carbon-14 (Total) 5.61E+00 O.OOE+00

Zeros indicate that no radioactivity was present at detectable levels.

1.1OE+00 5.6 1E+00 El-20

Curies released Gaseous Ground Level Releases During the period Starting: 1-Oct-201 IEnding: 31-Dec-201 1 FISSION GASES Xenon-133 Xenon-135 Argon-41 TOTALS CONTINUOUS O.OOE+01 O.OOE+01 O.OOE+01 O.OOE+01 BATCH 4.74E-02 3.43E-03 2.46E-01 2.97E-01 TOTAL 4.74E-02 3.43E-03 2.46E-0 1 2.97E-01 IODINES TOTALS 0.00E+01 0.00E+01 0.00E+0 1 PARTICULATES TOTALS TRITIUM O.OOE+O I O.OOE+O 1 O.OOE+O1 Tritium 8.33E+00 3.2 1E-0I 8.65E+00 CARBON-14 Carbon-14 (CO 2 form) 1.15E+00 O.OOE+00 Carbon-14 (Total) 5.87E+00 O.OOE+00

Zeros indicate that no radioactivity was present at detectable levels.

1.15E+00 5.87E+00 El-21

TABLE B GASEOUS "TYPICAL" LLD EVALUATION(')

Noble Gas Nuclide Krypton-87 Krypton-88 Xenon-133 Xenon-133m Xenon-135 Xenon-138 Particulate Sample 3)

Manganese-54 Cobalt-58 Iron-59 Cobalt-60 Zinc-65 Molybdenum-99 Cesium-134 Cesium-137 Cerium-141 Cerium-144 Iodine-131 Charcoal Sample Iodine-131 ODCM LLD 1.0E-04 1.0E-04 1.01E-04 1.OE-04 1.OE-04 1.OE-04 L.OE-10 1.OE-10 1.OE-10 1.OE-10 1.OE-10 1.0E-10 L.OE-10 1.OE-10 1.OE-10 1.OE-10 1.OE-10 1.OE-1 1 lhr 2.08E-06 1.61 E-06 6.61E-07 2.34E-06 3.43E-07 1.40E-04 Ihr 7.47E-12 5.62E-12 1.20E-1 1 1.07E-11 6.71 E-12 3.43E-11 4.25E-12 8.48E-12 5.10E-12 2.01E-11 4.76E-12 7.25E-12 A~t(2) 1.5 hr 2.73E-06 1.81E-06 6.63E-07 2.35E-06 3.56E-07 6.1OE-04 24 hr 3.12E-13 2.35E-13 5.02E-13 4.46E-13 2.80E-13 1.61E-12 1.77E-13 3.54E-13 2.15E-13 8.33E-13 2.07E-13 3.15E-13 7.0 day 4.48E-14 3.46E-14 7.49E-14 6.38E-14 4.03E-14 4.70E-13 2.54E-14 5.05E-14 3.26E-14 1.20E-13 3.77E-14 5.74E-14 Note:

(1) LLD values are in [tCi/ml.

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

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

EI-22

TABLE B GASEOUS "TYPICAL" LLD EVALUATION() (continued)

Nuclide ODCM LLD Typical LLD Tritium 1.OE-06 1.OE-1 I Gross Alpha 1.OE-I 1 1.5E-14 Strontium-89 1.OE-1 I 1.0E-14 Strontium-90 1.0E-11 1.0E-15 NOTE:

(1) LLD values are in ýtCi/cc.

El -23

SOLID WASTE (RADIOACTIVE SHIPMENTS)

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

1. Type of Waste Unit Period Error %

a. Spent Resins, Filter Sludges, Evaporator Bottoms, m 3 6.93E+00

+I.00E+01 etc.

Ci 8.27E+00

+2.29E+01

b. Dry Active Waste, Compressible Waste m3 7.11 E+O1

+1.00E+01 Contaminated Equipment, etc.

Ci 3.98E-01

+2.29E+01

c. Irradiated Components, Control m 3 None N/A Rods, etc.

Ci None N/A

d. Other: Mechanical Filters m3 None N/A Ci None N/A The reported volume is based on the defined volume of the packaging. During transit, the waste may settle resulting in an overall reduced volume. The reduction in disposal volume is estimated to be 10 percent less than the package volume.

The estimated total error (percent) for the total Curies shipped is based on calculating the square root of the sum of the squares method. Three parameters were considered as important for estimating the error. The parameters were variances with sample preparation and counting geometry, survey instrument accuracy for dose to Currie evaluations, and "in-field" sampling techniques. The assigned values for these parameters were 20, 10, and 5 percent, respectively.

Total error (%) = (0.202 + 0.102 + 0.052)1/2 x 100 = 22.9%

EI-24

SOLID WASTE (RADIOACTIVE SHIPMENTS) (continued)

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 2.229E-01 2.695

2.

Carbon-14 2.147E-04 0.003

3.

Manganese-54 8.727E-02 1.055

4.

lron-55 1.139E+00 13.766

5.

Cobalt-57 1.863E-02 0.225

6.

Cobalt-58 3.319E-01 4.013

7.

Cobalt-60 2.195E+00 26.542

8.

Nickel-59 2.761E-02 0.334

9.

Nickel-63 3.668E+00 44.339

10.

Zinc-65 3.861E-01 4.667

11.

Strontium-89 4.738E-06 0.000

12.

Strontium-90 6.480E-04 0.008

13.

Niobium-95 2.674E-04 0.003

14.

Antimony-124 3.776E-04 0.005

15.

Antimony-125 2.206E-02 0.267

16.

Cesium-134 2.168E-02 0.262

17.

Cesium-137 1.301E-01 1.573

18.

Cerium-144 1.966E-02 0.238

19.

Plutionium-238 4.908E-06 0.000

20.

Plutionium-239 9.05 1E-07 0.000

21.

Plutionium-240 9.0511E-07 0.000

22.

Plutionium-241 4.950E-04 0.006

23.

Americium-241 3.208E-06 0.000

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

1.

Chromium-51 1.387E-02 3.489

2.

Manganese-54 2.388E-02 6.005

3.

Iron-55 2.684E-01 67.505

4.

Iron-59 2.877E-03 0.724

5.

Cobalt-57 1.152E-04 0.029

6.

Cobalt-58 2.015E-02 5.067

7.

Cobalt-60 3.922E-02 9.864

8.

Nickel-63 1.352E-02 3.401

9.

Zinc-65 7.306E-03 1.837

10.

Zirconium-95 1.868E-03 0.470

11.

Niobium-95 5.532E-03 1.391

12.

Cesium-134 1.905E-04 0.048

13.

Cesium-137 4.107E-04 0.103

14.

Cerium-144 2.645E-04 0.067 EI-25

SOLID WASTE (RADIOACTIVE SHIPMENTS) (continued)

c. Irradiated Components Curies Percent None N/A N/A

d. Other: Mechanical Filters None Curies N/A Percent N/A

3.

Solid Waste Disposition

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

Number of Shipments Type Quantity Mode of Transportation Destination 2

A-LSA II Motor Freight Duratek Processing Facility Kingston, TN

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

Number of Shipments Type Quantity Mode of Transportation Destination 8

A-LSA 1I Motor Freight Duratek Processing Facility Oak Ridge, TN 2

Limited Quantity Motor Freight Duratek Processing Facility Kingston, TN

c. Irradiated components, control rods, etc.

Number of Shipments Type Quantity N

Mode of Transportation I Destination None N/A N/A N/A

d. Other: Mechanical Filters Number of Shipments Type Quantity N

Mode of Transportation I Destination None IN/A N/A N/A

4. Irradiated Fuel Shipments (Disposition)

Number of Shipments Type Quantity

/

Mode of Transportation I Destination None N/A N/A N/A

5.

Solidification of Waste Was solidification performed? No If yes, solidification media: N/A EI-26

Independent Spent Fuel Storage Installation SQN implemented use of an independent spent fuel storage installation (ISFSI) on July1 3, 2004, utilizing 10 CFR 72.214 Certificate of Compliance (CoC number 1014). The ISFSI is located on site, within the protected area and is designed to hold 90 spent fuel canisters. CoC 1014 Appendix A Section 5.4 requires an annual report in accordance with 10 CFR 72.44(d)(3). A report has been submitted providing the results of any releases during this monitoring period.

CoC 1014 Section 5.4 also provides that the ISFSI operations may be considered part-of plant operations for the purposes of the radiological environmental monitoring program.

CoC 1014 Section 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 assurance that there are not radioactive effluents from spent fuel storage canister."

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

Total Body

<25 mrem/year Thyroid

<75 mrem/year Any other organ

<25 mrem/year Although CoC 1014 provides that the HI-STORM 100 Cask System does not create any radioactive material or have any radioactive waste treatment systems, for this report, total site releases include the SQN ISFSI as part of the SQN site and part of plant operations. These releases are within 40 CFR 190 limits and 10 CFR 72.104 limits.

El -27

ENCLOSURE 2 RADIOLOGICAL IMPACT ASSESSMENT REPORT SEQUOYAH NUCLEAR PLANT 2011 E2-1

2011 SEQUOYAH NUCLEAR PLANT RADIOLOGICAL IMPACT ASSESSMENT REPORT INTRODUCTION Potential doses to maximum individuals and the population around Sequoyah Nuclear Plant (SQN) are calculated for each quarter as required in Section 5.2 of the Offsite Dose Calculation Manual (ODCM). Measured plant releases for the reporting period are used to estimate these doses. Dispersion of radioactive effluents in the environment is estimated using meteorological data and riverflow data measured during the period. In this report, the doses resulting from releases are described and compared to limits established for SQN.

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

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

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

- and -

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

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

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

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

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

- and -

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

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

- and -

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

E2-2

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

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

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

Meteorological Data Meteorological variables at SQN are measured continuously. Measurements collected include wind speed, wind direction, and temperature at heights of 10, 46, and 91 meters above the ground. Quarterly joint frequency distributions (JFDs) are calculated for each release point using the appropriate levels of meteorological data. A JFD gives the percentage of the time in a quarter that the wind is blowing out of a particular upwind compass sector in a particular range of wind speeds for a given stability Class A through G. The wind speeds are divided into nine wind speed ranges. Calms are distributed by direction in proportion to the distribution of noncalm wind directions less than 0.7 m/s (1.5 mph). Stability classes are determined from the vertical temperature difference between two measurement levels.

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

E2-3

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

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

Doses from airborne effluents are presented in Tables 1-4.

DOSES FROM LIQUID EFFLUENTS For liquid effluents, the public can be exposed to radiation from three sources: the ingestion of water from the Tennessee River, the ingestion of fish caught in the Tennessee River, and direct exposure from radioactive material deposited on the river shoreline sediment (recreation).

The concentrations of radioactivity in the Tennessee River are estimated by a computer model which uses measured hydraulic data downstream of SQN. Parameters used to determine the doses are based on guidance given by the NRC (in Regulatory Guides 1.109) for maximum ingestion rates, exposure times, etc. Wherever possible, parameters used in the dose calculation are site specific use factors determined by TVA. The models that are used to estimate doses, as Well as the parameters input to the models, are described in detail in the SQN ODCM.

Liquid Release Points and River Data Radioactivity concentrations in the Tennessee River are calculated assuming that releases in liquid effluents are continuous. Routine liquid releases from SQN, located at Tennessee River Mile 484, are made through diffusers which extend into the Tennessee River. It is assumed that releases to the river through these diffusers will initially be entrained in one-fifth of the water which flows past the plant. The QWATA code makes the assumption that this mixing condition holds true until the water is completely mixed at the first downstream dam, at Tennessee River Mile 471.

E2-4

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 5-8, 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 the 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 1-4 and Tables 5-8.

DIRECT RADIATION External gamma radiation levels were measured by thermoluminescent dosimeters (TLDs) deployed around SQN as part of the offsite REMP. The quarterly gamma radiation levels determined from these TLDs during this reporting period averaged approximately 17.0 mrem/quarter at onsite (at or near the site boundary) stations and approximately 15.25 mrem/quarter at offsite stations, or approximately 1.75 mrem/quarter higher at ornsite 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 mremlquarter higher than the levels offsite. This may be attributable to natural variations in environmental radiation levels, earth moving activities onsite, the mass of concrete employed in the construction of the plants, or other undetermined influences. Fluctuations in natural background dose rates and in TLD readings tend to mask any small increments which E2-5

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 ODCM, an evaluation of the dose to a member of the public inside the unrestricted area boundary is performed for a hypothetical TVA employee who works just outside the restricted area 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 55 mrem. Using this value, and subtracting an annual background value of 0 mrem/year (from perimeter TLDs around Sequoyah from Area TLD posting data for the year), and multiplying by the ratio of the occupancy times (2000/8760), the external dose was 12.69 mrem.

The doses due to radioactive effluents released to the atmosphere calculated in this report would not add a significant amount to this measured dose. This dose is well below the 10 CFR 20 annual limit of 100 mrem.

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

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

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

Cumulative annual total doses are presented in Table 9.

E2-6

Tables 1 and 2 Doses from Airborne Effluents First Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distance/Unit External Gamma Air 6.45E-04 mrad 5 mrad

<1%

N/950/meters Beta Air 2.43E-04mrad 10 mrad

<1%

N/950/meters Submersion Total Body 4.OOE-04 mrad 10 mrad

<1%

SSW/2314/meters Skin 5.89E-04 mrad 10 mrad

<1%

SSW/23.14/meters Organ Doses' (Max) Child/Bone 3.84E-01 mrem 7.5 mrem 5.12%

SSW3220/meters Child/Thyroid 7.83E-02 mrem 7.5 mrem 1.04%

SSW3220/meters Child/Total Body 7.83E-02 mrem 7.5 mrem 1.04%

SSW3220/meters Population Doses Total Body Dose 4.41E-01 man-rem Maximum Organ Dose (organ) 2.13E+00 man-rem (Bone)

Second Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distance/Unit External Gamma Air 2.3 1E-03 mrad 5 mrad

<1 N/950/meters Beta Air 8.41E-04 mrad 10 mrad

<1 N/950/meters Submersion Total Body 1.34E-03 mrad 10 mrad

<1 N/1295/meters Skin 1.97E-03 mrad 10 mrad

<1 N/1295/meters Organ Doses' (Max) Child/Bone 3.55E-01 mrem 7.5 mrem 2.66%

SSW/3220/meters Child/Thyroid 7.41E-02 mrem 7.5 mrem 0.99%

SSW/3220/meters Child/Total Body 7.4 1E-02 mrem 7.5 mrem 0.99%

SSW/3220/meters Population Doses Total Body Dose Maximum Organ Dose (organ) 4.07E-01 man-rem 1.89E+00 man-rem (Bone)

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/year for natural background).

'Organ Doses include contributions from Carbon-14 in the form of Carbon Dioxide.

E2-7

Tables 3 and 4 Doses from Airborne Effluents Third Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distance/Unit External Gamma Air 4.99E-04 mrad 5 mrad

<1 N/950/meters Beta Air 1.85E-04 mrad 10 mrad

<1 N/950/meters Submersion Total Body 3.18E-04 mrad 10 mrad

<1 S/i 786/meters Skin 4.67E-04 mrad 10 mrad

<1 S/i 786/meters Organ Doses' (Max) Child/Bone 4.03E-01 mrem 7.5 mrem 5.37%

SSW/3220/meters Child/Thyroid 8.13E-02 mrem 7.5 mrem 1.08%

SSW/3220/meters Child/Total Body 8.13E-02 mrem 7.5 mrem 1.08%

SSW/3220/meters Population Doses Total Body Dose 4.38E-01 man-rem Maximum Organ Dose (organ) 2.15E+00 man-rem (Bone)

Fourth Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distance/Units External Gamma Air 3.27E-04mrad 5 mrad

<1 N/950/meters Beta Air 1.23E-04 mrad 10 mrad

<1 N/950/meters Submersion Total Body 1.89E-04 mrad 10 mrad

<1 SSW/2134/meters Skin 2.80E-04 mrad 10 mrad

<1 SSW/2134/meters Organ Doses]

-_(Max) Child/Bone 4.41E-Olmrem 7.5 mrem 5.88%

SSW/3220/meters Child/Thyroid 9.1 OE-02 mrem 7.5 mrem 1.21%

SSW/3220/meters Child/Total Body 9.1 OE-02 mrem 7.5 mrem 1.21%

SSW/3220/meters Population Doses Total Body Dose Maximum Organ Dose (organ) 5.07E-01 man-rem 2.38E-00 man-rem (Bone)

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

'Organ Doses include contributions from Carbon-14 in the form of Carbon Dioxide.

E2-8

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

Quarterly Percent of Age Group Organ Dose Limit Limit Child Total Body 1.60E-03 1.5 mrem

< 1 %

Child Liver 1.60E-03 5 mrem

< 1 %

Child Thyroid 1.60E-03 5 mrem

< 1 %

Average Riverflow past SQN (cubic feet per second): 44,928 Population Doses Total Body Dose 1.OOE-01 man-rem Maximum Organ Dose (organ) 1.OOE-01 man-rem (GIT, Bone, Thyroid, Liver, Kidney, Lung)

Second Quarter Individual Doses (mrem)

Quarterly Percent of Age Group Organ Dose Limit Limit Child Total Body 2.10E-03 1.5 mrem

< 1 %

Child Liver 2.1 OE-03 5 mrem

< 1 %

Child Thyroid 2.1OE-03 5 mrem

< 1 %

Average Riverflow past SQN (cubic feet per second): 31,818 Population Doses Total Body Dose 1.40E-01 man-rem Maximum Organ Dose (organ) 1.40E-01 man-rem (Bone, Liver, GIT, Thyroid, Kidney, Lung)

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

E2-9

Tables 7 and 8 Doses from Liquid Effluents Third Quarter Individual Doses (mrem Quarterly Percent of Age Group Organ Dose Limit Limit Child Total Body 2.80E-03 1.5 mrem

< 1 %

Child Liver 2.80E-03 5 mrem

< 1 %

Child Thyroid 2.80E-03 5 mrem

< 1 %

Average Riverflow past SQN (cubic feet per second): 24,870 Population Doses Total Body Dose 1.90E-Olman-rem Maximum Organ Dose (organ) 1.90E-01 man-rem (Bone, Liver, GIT, Thyroid, Kidney, Lung)

Fourth Quarter Individual Doses (mrem_

Quarterly Percent of Age Group Organ Dose Limit Limit Child Total Body 6.1OE-04 1.5 mrem

< 1 %

Child Liver 6.1 OE-04 5 mrem

< 1 %

Child Thyroid 6.10E-04 5 mrem

< 1 %

Average Riverflow past SQN (cubic feet per second): 47,682 Population Doses Total Body Dose 4.OOE-02 man-rem Maximum Organ Dose (organ) 4.OOE-02 man-rem (Bone, Liver, GIT, Thyroid, Kidney, Lung)

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

E2-10

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 4.OOE-04 1.34E-03 3.18E-04 1.89E-04 Critical organ dose (air) 3.84E-01 3.55E-01 4.03E-01 9.01E-02 Total body dose (liquid) 1.60E-03 2.1OE-03 2.80E-03 6.1OE-04 Maximum organ dose (liquid) 1.60E-03 2.1 OE-03 2.80E-03 6.1 OE-04 Direct Radiation Dose 0.OOE-00 0.OOE-00 0.OOE-00 0.OOE-00 Total 3.88E-01 3.61E-01 4.09E-01 9.15E-02 Cumulative Total Dose (Total body or any other organ) mrem 1.25E+00 Annual Dose Limit (mrem) 25 Percent of Limit 5.00 Thyroid Dose (mrem Total body air submersion 4.OOE-04 1.34E-03 3.18E-04 1.89E-04 Thyroid dose (airborne) 7.83E-02 7.41E-02 8.13E-02 4.41E-01 Total body dose (liquid) 1.60E-03 2.1OE-03 2.80E-03 6.1OE-04 Thyroid dose (liquid) 1.60E-03 2.1 OE-03 2.80E-03 6.1 OE-04 Direct Radiation Dose 0.OOE-00 0.OOE-00 0.OOE-00 0.OOE-00 Total 8.19E-02 7.96E-02 8.72E-02 4.42E-01 Cumulative Total Dose (Thyroid) mrem 6.91E-01 Annual Dose Limit (mrem) 75 Percent of Limit 0.92 E2-11

.0 Joint Frequency Distribution Tables Al-I

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

SEQUOYAH NUCLEAR PLANT JAN 1, 2011 -

MAR 31, 2011 WIND DIRECTION WIND SPEED(MPH) 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW CALM 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 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL 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 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 0.046 0.046 0.000 0.000 0.046 0.000 0.000 0.000 0.046 0.000 0.000 0.093 0.000 0.000 0.279 0.139 0.464 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.186 0.046 0.046 0.093 0.000 0.000 0.139 1.161 0.046 0.093 0.093 0.000 0.000 0.000 0.000 0.046 0.093 0.325 0.279 0.000 0.093 0.046 0.186 0.186 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 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.186 0.557 0.186 0.046 0.000 0.000 0.046 0.046 0.093 0.511 0.372 0.046 0.186 0.139 0.186 0.325 2.926 SUBTOTAL 1.486 0.000 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS A TOTAL TOTAL TOTAL HOURS HOURS HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2156 63 63 2153 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: 2011/05/05 MEAN WIND SPEED 7.43 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-2

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B

(-1.9< DELTA T<=-1.7 C/100 M)

SEQUOYAH NUCLEAR PLANT JAN 1, 2011 -

MAR 31, 2011 WIND DIRECTION N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW SUBTOTAL WIND SPEED(MPH)

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

>=24.5 TOTAL 0.000 0.000 0.000 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 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 0.186 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 0.186 0.000 0.186 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 0.093 0.046 0.511 0.186 0.325 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.325 0.279 0.000 0.046 0.046 0.093 0.186 1.579 0.046 0.232 0.046 0.000 0.000 0.000 0.000 0.046 0.139 0.511 0.232 0.000 0.000 0.046 0.093 0.186 1.579 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 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 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 0.232 0.743 0.418 0.000 0.000 0.000 0.000 0.046 0.139 0.882 0.511 0.000 0.046 0.139 0.279 0.418 3.855 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS B TOTAL TOTAL TOTAL HOURS HOURS HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2156 83 83 2153 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 MEAN WIND SPEED 7.00 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-3 DATE PRINTED: 2011/05/05

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C

(-1.7< DELTA T<=-1.5 C/100 M)

SEQUOYAH NUCLEAR PLANT JAN 1, 2011 -

MAR 31, 2011 WIND DIRECTION WIND SPEED(MPH) 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW CALM 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 7.5-12.4 12.5-18.4 18.5-24.4 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 0.046 0.046 0.093 0.046 0.046 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.325 0.093 0.139 0.372 0.000 0.000 0.000 0.000 0.093 0.000 0.093 0.232 0.000 0.093 0.046 0.046 0.000 1.208 0.139 0.650 0.093 0.046 0.000 0.000 0.000 0.000 0.093 0.604 0.372 0.046 0.139 0.186 0.000 0.093 2.462 0.000 0.511 0.093 0.000 0.000 0.000 0.000 0.000 0.186 0.279 0.139 0.000 0.000 0.000 0.279 0.093 1.579 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

>=24.5 TOTAL 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 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 0.232 1.301

0. 604 0.093 0.093 0.046 0.046 0.093 0.279 1.022 0.743 0.046 0.232 0.232 0.325 0.186 5.574 SUBTOTAL 0.000 0.000 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS C TOTAL TOTAL TOTAL HOURS HOURS HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2156 120 120 2153 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: 2011/05/05 MEAN WIND SPEED =

6.43 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS AI-4

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D

(-1.5< DELTA T<=-0.5 C/100 M)

SEQUOYAH NUCLEAR PLANT JAN 1, 2011 -

MAR 31, 2011 WIND DIRECTION N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW SUBTOTAL WIND SPEED(MPH)

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

>=24.5 TOTAL 0.000 0.000 0.000 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 0.046 0.000 0.000 0.000 0.000 0.000 0.093 0.046 0.000 0.000 0.000 0.046 0.000 0.093 0.325 1.208 1.440 0.975 0.279 0.093 0.093 0.139 0.139 0.325 1.022 1.068 0.279 0.464 0.139 0.279 0.604 2.601 3.112 0.372 0.000 0.000 0.000 0.000 0.046 0.650 1.440 1.858 0.372 0.232 0.186 0.790 0.975 2.462 2.880 0.372 0.000 0.000 0.000 0.000 0.000 0.372 1.719 0.929 0.325 0.279 0.650 0.836 1.440 1.254 2.044 0.232 0.000 0.000 0.000 0.000 0.093 0.418 0.882 0.511 0.232 0.511 0.697 0.604 0.325 7.803 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 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 7.524 9.475 1.997 0.279 0.093 0.093 0.139 0.279 1.858 5.109 4.366 1.208 1.486 1.719 2.508 3.437 8.546 12.634 12.262 0.000 0.000 0.000 41.570 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS D.

TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS TOTAL HOURS CALM METEOROLOGICAL FACILITY:

SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL MEAN WIND SPEED =

5.39 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS 2156 898 895 2153 0

DATE PRINTED: 2011/05/05 Al-5

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E

(-0.5< DELTA T<= 1.5 C/100 M)

SEQUOYAH NUCLEAR PLANT JAN 1, 2011 -

MAR 31, 2011 WIND DIRECTION WIND SPEED(MPH) 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW CALM 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 7.5-12.4 12.5-18.4 0.186 0.139 0.093 0.046 0.000 0.000 0.046 0.046 0.372 0.186 0.139 0.093 0.093 0.093 0.093 0.046 1.533 2.601 0.743 0.000 0.093 0.093 0.279 0.139 0.464 1.393 2.276 0.790 0.232 0.139 0.372 0.697 1.022 2.183 0.046 0.000 0.000 0.000 0.046 0.093

0. 604 1.161 1.765 0.325 0.325 0.232 0.186 0.279 0.093 0.743 0.046 0.000 0.000 0.000 0.000 0.325 0.511 1.533 1.161 0.046 0.139 0.232 0.186 0.186 5.202 0.139 0.139 0.000 0.000 0.000 0.000 0.000 0.000 0.650 0.697 0.418 0.093 0.046 0.000 0.046 0.046 2.276 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 18.5-24.4

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

>=24.5 TOTAL 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 2.973 5.806 0.929 0.046 0.093 0.093 0.372 0.604 2.601 5.016 5.759 1.347 0.836 0.697 0.882 1.254 SUBTOTAL 1.672 11.844 8.268 0.000 0.000 29.308 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS E TOTAL TOTAL TOTAL HOURS HOURS HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2156 631 631 2153 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: 2011/05/05 MEAN WIND SPEED =

4.08 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS AI-6

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F

( 1.5< DELTA T<= 4.0 C/100 M)

SEQUOYAH NUCLEAR PLANT JAN 1, 2011 -

MAR 31, 2011 WIND DIRECTION N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW SUBTOTAL WIND SPEED(MPH)

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

>=24.5 TOTAL 0.004 0.010 0.005 0.001 0.001 0.000 0.001 0.002 0.003 0.008 0.009 0.001 0.001 0.000 0.000 0.001 0.046 0.279 0.511 0.232 0.046 0.046 0.046 0.186 0.232 0.279 0.232 0.000 0.000 0.093 0.046 0.046 0.000 2.276 0.464 1.301 0.557 0.093 0.046 0.000 0.000 0.186 0.186 1.161 1.579 0.093 0.046 0.000 0.000 0.093 5.806 0.000 0.093 0.139 0.000 0.000 0.000 0.000 0.000 0.046 0.511 0.325 0.093 0.000 0.000 0.000 0.000 1.208 0.046 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 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 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 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 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 0.794 1.915 0.933 0.140 0.093 0.047 0.187 0.420 0.514 1.912 1.960 0.186 0.140 0.047 0.047 0.093 9.429 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS F TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS TOTAL HOURS CALM METEOROLOGICAL FACILITY:

SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL 2156 203 203 2153 1

DATE PRINTED: 2011/05/05 MEAN WIND SPEED =

2.25 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS AI-7

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

SEQUOYAH NUCLEAR PLANT JAN 1, 2011 -

MAR 31, 2011 WIND DIRECTION WIND SPEED (MPH) 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 CALM 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW 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 0.139 0.511 0.279 0.139 0.232 0.139 0.139 0.418 0.232 0.093 0.000 0.139 0.046 0.000 0.046 0.000 0.790 0.464 0.186 0.000 0.000 0.093 0.000 0.139 0.836 0.975 0.046 0.000 0.000 0.000 0.093 0.000 0.464 0.279 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.372 0.000 0.000 0.000 0.000 0.000 1.161 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 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 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 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.393 1.254 0.464 0.139 0.232 0.232 0.139 0.557 1.115 1.440 0.046 0.139 0.046 0.000 0.139 7.339 SUBTOTAL 2.555 3.623 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS G TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 2156 158 158 2153 0

TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY TOTAL HOURS CALM OBSERVATIONS 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: 2011/05/05 MEAN WIND SPEED =

2.05 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-8

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

SEQUOYAH NUCLEAR PLANT APR 1, 2011 -

JUN 30, 2011 WIND DIRECTION WIND SPEED (MPH) 3.5-5.4 5.5-7.4 N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW CALM 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 0.6-1.4 1.5-3.4 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL 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 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 0.092 0.322 0.506 0.046 0.000 0.000 0.000 0.000 0.000 0.506 0.828 0.000 0.000 0.000 0.000 0.000 0.046 0.046 0.138 0.000 0.000 0.000 0.000 0.000 0.184 0.414 0.092 0.000 0.000 0.000 0.000 0.046 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.414 0.184 0.000 0.000 0.368 0.046 0.138 1.195 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 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 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 0.138 0.414 0.644 0.046 0.000 0.000 0.000 0.000 0.184 1.333 1.103 0.000 0.000 0.368 0.046 0.184 4.460 SUBTOTAL 2.299 0.966 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS A TOTAL TOTAL TOTAL HOURS HOURS HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2175 97 97 2175 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: 2011/07/26 MEAN WIND SPEED =

6.09 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS AI-9

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B

(-1.9< DELTA T<=-1.7 C/100 M)

SEQUOYAH NUCLEAR PLANT APR 1, 2011 -

JUN 30, 2011 WIND DIRECTION N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW SUBTOTAL WIND SPEED(MPH)

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

>=24.5 TOTAL 0.000 0.000 0.000 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 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 0.046 0.092 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.230 0.092 0.322 0.276 0.000 0.000 0.046 0.000 0.000 0.092 0.782 0.460 0.046 0.000 0.046 0.000 0.000 2.161 0.092 0.184 0.000 0.000 0.000 0.000 0.000 0.000 0.230 0.828 0.230 0.000 0.000 0.046 0.046 0.092 1.747 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.598 0.046 0.000 0.000 0.092 0.092 0.138 1.057 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 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 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 0.230 0.552 0.368 0.000 0.000 0.046 0.046 0.000 0.368 2.207 0.782 0.046 0.000 0.184 0.138 0.230 5.195 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS B TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS TOTAL HOURS CALM METEOROLOGICAL FACILITY:

SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL 2175 113 113 2175 0

DATE PRINTED: 2011/07/26 MEAN WIND SPEED 5.99 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-IO

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C

(-1.7< DELTA T<=-1.5 C/100 M)

SEQUOYAH NUCLEAR PLANT APR 1, 2011 -

JUN 30, 2011 WIND DIRECTION N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW SUBTOTAL WIND SPEED(MPH)

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

>=24.5 TOTAL 0.000 0.000 0.000 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 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 0.046 0.138 0.046 0.046 0.000 0.000 0.000 0.046 0.184 0.138 0.046 0.000 0.000 0.000 0.000 0.690 0.092 0.460 0.276 0.000 0.000 0.046 0.046 0.046 0.230 1.563 0.690 0.000 0.046 0.000 0.092 0.000 3.586 0.046 0.138 0.000 0.000 0.000 0.000 0.000 0.000 0.138 0.782 0.276 0.000 0.000 0.138 0.230 0.046 1.793 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.138 0.368 0.046 0.000 0.000 0.046 0.046 0.000 0.690 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.092 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 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 0.184 0.690 0.414 0.046 0.046 0.046 0.046 0.046 0.552 2.897 1.149 0.046 0.046 0.230 0.368 0.046 6.851 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS C TOTAL TOTAL TOTAL HOURS HOURS HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2175 149 149 2175 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: 2011/07/26 MEAN WIND SPEED 5.36 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-1I

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D

(-1.5< DELTA T<=-0.5 C/100 M)

SEQUOYAH NUCLEAR PLANT APR 1, 2011 -

JUN 30, 2011 WIND DIRECTION N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW SUBTOTAL WIND SPEED(MPH)

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

>=24.5 TOTAL 0.000 0.000 0.000 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 0.092 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.092 0.046 0.598 0.966 1.241 0.368 0.230 0.230 0.276 0.690 1.103 1.931 1.701 0.184 0.368 0.460 0.276 0.138 0.690 1.195 0.230 0.046 0.046 0.046 0.000 0.046 1.655 4.368 1.885 0.322 0.690 0.230 0.414 0.322 0.506 0.322 0.046 0.000 0.000 0.000 0.000 0.000 1.057 1.885 0.874 0.230 0.276 0.276 0.230 0.506 6.207 0.414 0.230 0.046 0.000 0.000 0.000 0.000 0.230 0.874 0.552 0.460 0.368 0.138 0.230 0.138 0.092 3.770 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 0.046 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 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 2.207 2.805 1.609 0.414 0.276 0.276 0.276 0.966 4.690

.8.736 4.920 1.103 1.471 1.195 1.195 1.103 0.276 10.759 12.184 0.046 0.000 0.000 33.241 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS D TOTAL HOURS TOTAL HOURS TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2175 723 723 2175 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: 2011/07/26 MEAN WIND SPEED =

4.62 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-12

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E

(-0.5< DELTA T<= 1.5 C/100 M)

SEQUOYAH NUCLEAR PLANT APR 1, 2011 -

JUN 30, 2011 WIND DIRECTION WIND SPEED(MPH) 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 CALM 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW 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 0.368 0.644 0.322 0.092 0.230 0.092 0.138 0.046 0.368 0.138 0.276 0.046 0.092 0.092 0.046 0.138 2.253 2.529 0.414 0.184 0.092 0.092 0.276 0.276 1.103 2.115 2.759 0.966 0.598 0.184 0.414 0.828 0..644 0.460 0.000 0.000 0.046 0.046 0.000 0.184 0.828 1.655 1.241 0.230 0.230 0.138 0.230 0.322 6.253 0.138 0.046 0.000 0 000 0.000 0.000 0.000 0.092 0.506 1.057 0.368 0.230 0.046 0.000 0.092 0.046 2.621 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.138 0.322 0.506 0.138 0.184 0.046 0.000 0.046 0.046 1.425 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 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 3.402 3.678 0.736 0.276 0.368 0.230 0.414 0.736 3.126 5.471 4.782 1.655 1.011 0.414 0.828 1.379 SUBTOTAL 3.126 15.080 0.000 28.506 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS E TOTAL TOTAL TOTAL HOURS HOURS HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2175 620 620 2175 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: 2011/07/26 MEAN WIND SPEED 3.32 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-13

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F

( 1.5< DELTA T<= 4.0 C/100 M)

SEQUOYAH NUCLEAR PLANT APR 1, 2011 -

JUN 30, 2011 WIND DIRECTION N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW SUBTOTAL WIND SPEED(MPH) 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 CALM 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 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL 0.414 0.552 0.690 0.184 0.230 0.184 0.322 0.460 0.230 0.046 0.138 0.046 0.046 0.000 0.092 0.000 2.023 4.690 0.966 0.092 0.000 0.046 0.046 0.230 0.828 1.425 1.287 0.460 0.230 0.046 0.092 0.690 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.276 0.184 0.000 0.000 0.000 0.138 0.000 0.690 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.046 0.046 0.046 0.000 0.046 0.000 0.000 0.000 0.230 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 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 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 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 2.437 5.287 1.655 0.276 0.230 0.230 0.368 0.736 1.149 1.839 1.655 0.506 0.322 0.046 0.322 0.690 0.000 3.632 13.149 0.046 0.000 0.000 17.747 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS F TOTAL TOTAL TOTAL HOURS HOURS HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2175 386 386 2175 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: 2011/07/26 MEAN WIND SPEED =

2.04 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-14

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

SEQUOYAH NUCLEAR PLANT APR 1, 2011 -

JUN 30, 2011 WIND DIRECTION N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW SUBTOTAL WIND SPEED(MPH) 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 CALM 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL 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 0.138 0.230 0.046 0.092 0.092 0.184 0.184 0.046 0.046 0.000 0.092 0.092 0.000 0.000 0.000 1.241 0.000 0.414 0.230 0.046 0.000 0.000 0.092 0.046 0.460 0.828 0.552 0.046 0.000 0.000 0.000 0.000 2.713 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 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.046 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 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 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 0.552 0.460 0.092 0.092 0.092 0.276 0.230 0.506 0.874 0.552 0.138 0.092 0.046 0.000 0.000 4.000 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS G TOTAL TOTAL TOTAL HOURS HOURS HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2175 87 87 2175 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: 2011/07/26 MEAN WIND SPEED =

1.91 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-15

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

SEQUOYAH NUCLEAR PLANT JUL 1, 2011 -

SEP 30, 2011 WIND DIRECTION WIND SPEED (MPH)

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

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW 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 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 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.045 0.091 0.181 0.363 0.091 0.000 0.000 0.000 0.045 0.091 0.272 1.134 0.091 0.000 0.000 0.000 0.000 2.358 0.000 0.952 0.363 0.000 0.000 0.000 0.000 0.000 0.045 1.270 1.134 0.091 0.000 0.181 0.045 0.136 4.218 0.045 0.136 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 0.045 0.000 0.091 0.091 0.000 0.091 0.590 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 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.136 1.270 0.771 0.136 0.000 0.000 0.000 0.045 0.136 1.587 2.313 0.181 0.091 0.272 0.045 0.227 SUBTOTAL 0.000 7.211 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS A TOTAL TOTAL TOTAL HOURS HOURS HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2205 159 159 2205 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: 2011/11/21 MEAN WIND SPEED =

5.91 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-16

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B

(-1.9< DELTA T<=-1.7 C/100 M)

SEQUOYAH NUCLEAR PLANT JUL 1, 2011 -

SEP 30, 2011 WIND DIRECTION N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW SUBTOTAL WIND SPEED(MPH) 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 CALM 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 7.5-12.4 12.5-18.4' 18.5-24.4

>=24.5 TOTAL 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 0.045 0.091 0.000 0.091 0.045 0.000 0.045 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.363 0.000 0.272 0.091 0.045 0.045 0.045 0.045 0.045 0.136 0.317 0.635 0.045 0.000 0.045 0.045 0.045 1.859 0.045 0.000 0.045 0.000 0.000 0.000 0.000 0.045 0.091 0.771 0.227 0.045 0.000 0.045 0.000 0.000 1.315 0.000 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.045 0.091 0.272 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 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 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 0.091 0.499 0.136 0.136 0.091 0.0.45 0.091 0.091 0.227 1.134 0.862 0.091 0.000 0.091 0.091 0.136 3.810 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS B TOTAL TOTAL TOTAL HOURS HOURS HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2205 84 84 2205 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: 2011/11/21 MEAN WIND SPEED =

5.30 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-17

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C

(-1.7< DELTA T<=-1.5 C/100 M)

SEQUOYAH NUCLEAR PLANT JUL 1, 2011 -

SEP 30, 2011 WIND DIRECTION WIND SPEED(MPH)

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

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW 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 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 0.091 0.136 0.091 0.045 0.045 0.136 0.136 0.045 0.045 0.045 0.000 0.000 0.045 0.000 0.000 0.862 0.045 0.680 0.272 0.000 0.000 0.000 0.227 0.136 0.272 1.361 0.816 0.045 0.000 0.000 0.045 0.000 3.900 0.136 0.181 0.091 0.000 0.000 0.000 0.000 0.000 0.136 0.408 0.136 0.091 0.045 0.000 0.000 0.136 1.361 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.045 0.091 0.227 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 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.227 0.998 0.499 0.091 0.045 0.045 0.363 0.272 0.454 1.814 0.998 0.136 0.045 0.045 0.091 0.227 SUBTOTAL 0.000 6.349 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS C TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 2205 140 140 2205 0

TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY TOTAL HOURS CALM OBSERVATIONS 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: 2011/11/21 MEAN WIND SPEED =

4.75 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-18

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D

(-1.5< DELTA T<=-0.5 C/100 M)

SEQUOYAH NUCLEAR PLANT JUL 1, 2011 -

SEP 30, 2011 WIND DIRECTION WIND SPEED(MPH)

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

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW 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 0.045 0.045 0.000 0.000 0.000 0.000 0.045 0.045 0.045 0.000 0.045 0.045 0.000 0.045 0.000 1.134 1.814 1.361 0.499 0.454 0.363 0.181 0.862 1.723 3.129 2.222 0.454 0.363 0.091 0.227 0.272 0.635 1.723 0.227 0.091 0.000 0.136 0.181 0.317 1.633 5.079 1.224 0.454 0.227 0.181

0. 680

0. 635 0.454 0.907 0.045 0.000 0.000 0.000 0.000 0.045 0.590 0.454 0.454 0.091 0.045 0.045 0.045 0.227 3.401 0.227 1.179 0.045 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.045 0.000 0.045 0.091 0.227 1.905 0.000 0.227 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 0.227 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 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 2.449 5.896 1.723 0.590 0.454 0.499 0.363 1.270 4.036 8.707 3.900 1.088 0.680 0.363 1.088 1.361 SUBTOTAL 0.363 15.147 13.424 0.000 34.467 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS D TOTAL TOTAL TOTAL HOURS HOURS HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2205 760 760 2205 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: 2011/11/21 MEAN WIND SPEED 4.03 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-19

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E

(-0.5< DELTA T<= 1.5 C/100 M)

SEQUOYAH NUCLEAR PLANT JUL 1, 2011 -

SEP 30, 2011 WIND DIRECTION N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW SUBTOTAL WIND SPEED(MPH)

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 0.007 0.006 0.001 0.000 0.001 0.000 0.001 0.001 0.003 0.005 0.006 0.003 0.001 0.001 0.003 0.005 0.045 0.726 0.544 0.317 0.181 0.227 0.045 0.272 0.045 0.272 0.317 0.136 0.408 0.272 0.227 0.408 0.499 3.991 3.265 0.408 0.000 0.181 0.091 0.227 0.544 1.723 2.902 3.492 1.769

0. 635 0.726 1.451 2.494 1.043 1.406 0.045 0.000 0.000 0.000 0.045 0.091 0.227 0.680 0.680 0.408 0.000 0.045 0.091 0.363 5.125 0.045 0.227 0.000 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.045 0.136 0.499 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 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 18.5-24.4 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

>=24.5 TOTAL 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 5.812 5.448 0.772 0.182 0.409 0.136 0.545 0.681 2.271 3.905 4.314 2.588 0.908 0.999 1.998 3.497 4.898 23.900 0.000 0.000 0.000 34.467 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS E TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 2205 760 760 2205 1

TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY TOTAL HOURS CALM OBSERVATIONS 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: 2011/11/21 MEAN WIND SPEED =

2.43 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS 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, 2011 -

SEP 30, 2011 WIND DIRECTION N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW SUBTOTAL WIND SPEED (MPH) 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 CALM 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 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL 0.454 0.635 0.408 0.454 0.181 0.091 0.091 0.181 0.363 0.000 0.136 0.045 0.000 0.091 0.045 0.227 2.086 3.311 0.635 0.136 0.045 0.045 0.045 0.091 0.363 0.590 0.317 0.317 0.091 0.000 0.227 0.680 8.980 0.136 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.045 0.000 0.227 0.499 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 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 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 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 2.676 3.946 1.043 0.590 0.227 0.181 0.136 0.272 0.771 0.635 0.454 0.363 0.091 0.136 0.272 1.134 0.000 3.401 0.000 12.925 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS F TOTAL TOTAL TOTAL HOURS HOURS HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2205 285 285 2205 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: 2011/11/21 MEAN WIND SPEED =

1.95 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-21

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

SEQUOYAH NUCLEAR PLANT JUL 1, 2011 -

SEP 30, 2011 WIND DIRECTION N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW SUBTOTAL WIND SPEED(MPH)

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

>=24.5 TOTAL 0.000 0.000 0.000 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 0.091 0.000 0.000 0.000 0.000 0.091 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.272 0.000 0.091 0.091 0.000 0.045 0.000 0.000 0.000 0.000 0.181 0.000 0.000 0.000 0.000 0.000 0.000 0.408 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 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 0.000 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.045 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 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 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 0.181 0.091 0.000 0.045 0.000 0.091 0.091 0.045 0.227 0.000 0.000 0.000 0.000 0.000 0.000 0.771 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS G TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 2205 17 17 2205 0

TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY TOTAL HOURS CALM OBSERVATIONS 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: 2011/11/21 MEAN WIND SPEED =

2.36 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-22

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

SEQUOYAH NUCLEAR PLANT OCT 1, 2011 -

DEC 31, 2011 WIND DIRECTION N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW SUBTOTAL WIND SPEED(MPH) 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 CALM 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 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL 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 0.045 0.045 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 0.182 0.000 0.045 0.091 0.045 0.000 0.000 0.000 0.000 0.091 0.045 0.091 0.000 0.000 0.000 0.000 0.000 0.409 0.091 0.227 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.227 0.182 0.000 0.000 0.000 0.000 0.000 0.727 0.136 0.091 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 0.227 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 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 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 0.227 0.363 0.136 0.091 0.000 0.000 0.000 0.000 0.136 0.273 0.273 0.000 0.000 0.000 0.000 0.045 1.545 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS A TOTAL TOTAL TOTAL HOURS HOURS HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2201 34 34 2201 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: 2012/02/16 MEAN WIND SPEED 5.62 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-23

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B

(-1.9< DELTA T<=-1.7 C/100 M)

SEQUOYAH NUCLEAR PLANT OCT 1, 2011 -

DEC 31, 2011 WIND DIRECTION WIND SPEED(MPH) 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 CALM 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW 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 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 0.045 0.000 0.000 0.045 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.136 0.091 0.363 0.136 0.091 0.000 0.000 0.045 0.000 0.091 0.182 0.318 0.091 0.000 0.045 0.045 0.000 1.499 0.136 0.182 0.000 0.000 0.000 0.000 0.000 0.000 0.136 0.500 0.136 0.000 0.000 0.000 0.000 0.136 1.227 0.182 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.045 0.091 0.000 0.045 0.091 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 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.409 0.545 0.182 0.091 0.000 0.045 0.045 0.000 0.273 0.727 0.454 0.136 0.091 0.045 0.091 0.227 3.362 SUBTOTAL 0.000 0.000 0.500 0.000 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS B TOTAL TOTAL TOTAL HOURS HOURS HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2201 74 74 2201 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: 2012/02/16 MEAN WIND SPEED =

5.73 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-24

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C

(-1.7< DELTA T<=-1.5 C/100 M)

SEQUOYAH NUCLEAR PLANT OCT 1, 2011 -

DEC 31, 2011 WIND DIRECTION WIND SPEED(MPH) 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 CALM 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW 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 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 0.091 0.273 0.091 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.045 0.273 0.318 0.227 0.000 0.045 0.000 0.000 0.000 0.318 0.318 0.182 0.000 0.000 0.000 0.045 0.000 1.726 0.454 0.227 0.091 0.000 0.000 0.000 0.000 0.000 0.136 0.227 0.182 0.045 0.000 0.000 0.000 0.000 1.363 0.045 0.091 0.045 0.000 0.000 0.000 0.000 0.000 0.091 0.045 0.000 0.045 0.000 0.000 0.045 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 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 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 0.772 0.727 0.636 0.091 0.045 0.091 0.000 0.000 0.545 0.591 0.363 0.136 0.000 0.000 0.091 0.045 4.134 SUBTOTAL 0.000 0.636 0.409 0.000 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS C TOTAL TOTAL TOTAL HOURS HOURS HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2201 91 91 2201 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 MEAN WIND SPEED =

5.29 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2012/02/16 Al-25

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D

(-1.5< DELTA T<=-0.5 C/100 M)

SEQUOYAH NUCLEAR PLANT OCT 1, 2011 -

DEC 31, 2011 WIND DIRECTION WIND SPEED (MPH) 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW CALM 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 7.5-12.4 12.5-18.4 18.5-24.4 0.000 0.045 0.000 0.045 0.000 0.045 0.091 0.045 0.045 0.000 0.045 0.000 0.045 0.000 0.045 0.045 1.181 2.045 0.818 0.454 0.045 0.182 0.273 0.182 0.591 1.045 1.136 0.363 0.091 0.273 0.227 0.318 1.681 2.135 0.363 0.136 0.000 0.045 0.0oo 0.091 1.408 2.090 1.772 0.363 0.182 0.091 0.636 1.090 1.181 1.681 0.000 0.000 0.000 0.000 0.000 0.000 0.863 1.090 0.954 0.909 0.227 0.318 0.318 0.772 8.314 0.545 0.454 0.000 0.000 0.000 0.000 0.000 0.091 1.090 0.636 0.136 0.318 0.227 0.000 0.045 0.227 3.771 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 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 4.589 6.361 1.181 0.636 0.045 0.273 0.363 0.409 3.998 4.861 4.044 1.954 0.772 0.682 1.272 2.453

>=24.5 TOTAL SUBTOTAL 0.000 0.500 9.223 12.085 0.000 33.894 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS D TOTAL TOTAL TOTAL HOURS HOURS HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2201 746 746 2201 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: 2012/02/16 MEAN WIND SPEED =

4.85 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-26

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E

(-0.5< DELTA T<= 1.5 C/100 M)

SEQUOYAH NUCLEAR PLANT OCT 1, 2011 -

DEC 31, 2011 WIND DIRECTION WIND SPEED(MPH)

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

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW 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 0.136 0.136 0.363 0.318 0.091 0.091 0.000 0.045 0.273 0.227 0.273 0.091 0.182 0.000 0.045 0.045 3.135 2.499 0.545 0.182 0.091 0.091 0.091 0.545 1.136 2.590 2.317 1.090 0.591 0.545 0.682 1.499 1.090 2.317 0.000 0.000 0.000 0.000 0.000 0.045 1.227 3.317 1.363 0.863 0.045 0.227 0.363 0.863 0.273 0.545 0.000 0.000 0.000 0.000 0.000 0.000 0.409 0.863 0.227 0.182 0.045 0.045 0.136 0.273 2.999 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.636 0.227 0.091 0.000 0.000 0.136 0.091 0.000 1.181 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 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 4.634 5.498 0.909 0.500 0.182 0.182 0.091 0.636 3.680 7.224 4.271 2.226 0.863 0.954 1.318 2.681 SUBTOTAL 2.317 17.628 11.722 0.000 35.847 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS E TOTAL TOTAL TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS HOURS CALM 2201 789 789 2201 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: 2012/02/16 MEAN WIND SPEED =

3.51 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-27

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F

( 1.5< DELTA T<= 4.0 C/100 M)

SEQUOYAH NUCLEAR PLANT OCT 1, 2011 -

DEC 31, 2011 WIND DIRECTION WIND SPEED (MPH) 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 CALM 7.5-12.4 12.5-18.4 18.5-24.4

>=24.5 TOTAL N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW 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 0.136 0.545 0.409 0.136 0.136 0.045 0.182 0.045 0.182 0.227 0.091 0.045 0.045 0.136 0.045 0.045 2.635 3.816 0.727 0.091 0.182 0.045 0.227 0.227 0.682 1.499 1.181 0.545 0.182 0.091 0.227 1.090 0.136 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.318 0.227 0.091 0.091 0.091 0.091 0.182 i.272 0.000 0.045 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 0.045 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 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 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 2.908 4.453 1.136 0.227 0.318 0.091 0.409 0.273 0.863 2.045 1.499 0.682 0.318 0.318 0.363 1.318 SUBTOTAL 2.453 13.448 0.000 17.219 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS F TOTAL TOTAL TOTAL HOURS HOURS HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS CALM 2201 379 379 2201 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 MEAN WIND SPEED =

2.27 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS DATE PRINTED: 2012/02/16 Al-28

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

SEQUOYAH NUCLEAR PLANT OCT 1, 2011 -

DEC 31, 2011 WIND DIRECTION N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW SUBTOTAL WIND SPEED(MPH)

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

>=24.5 TOTAL 0.000 0.000 0.000 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 0.182 0.045 0.091 0.045 0.045 0.136 0.136 0.136 0.000 0.045 0.000 0.000 0.000 0.000 0.863 0.227 0.682 0.318 0.091 0.091 0.045 0.136 0.045 0.273 0.727 0.227 0.000 0.045 0.045 0.000 0.045 2.999 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.136 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 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 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 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.227 0.682 0.545 0.136 0.182 0.091 0.182 0.182 0.409 0.954 0.227 0.045 0.045 0.045 0.000 0.045 3.998 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS G TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS TOTAL HOURS CALM METEOROLOGICAL FACILITY:

SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL MEAN WIND SPEED -

2.00 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS 2201 88 88 2201 0

DATE PRINTED: 2012/02/16 Al-29

.0 Deviations from ODCM Controls/Surveillance Requirements Date ODCM Description of Deviation Requirement June 10, 2011 1/2 1.2 2.1.2 During the performance of Chemistry Technical Instruction Table 1.1-2 0-TI-CEM-090-016.3, Sampling Methods - Auxiliary Building Item 4b & c, Exhaust Radiation Monitor, Chemistry personnel incorrectly installed the back-up sampler on radiation monitor 0-RM 101. The filter assembly was reversed so that flow went the wrong way through the charcoal filter, and then through the particulate filter. A rotometer that measured liters per minute was installed instead of a cubic feet per minute rotometer so that inadequate flow was flowing through the monitor.

PER 385249.

A2-1

.0 Radiation Monitors Inoperable for Greater than 30 days Date Description of Inoperability July 26, 2011 Unit 1 Upper Containment Radiation Monitor, 1-RM-90-112, Was declared inoperable on July 26, 2011. It had been removed from service to perform scheduled maintenance. The instrument failed its leak check on return to service and was made inoperable. Engineering contacted the vendor for assistance and parts. It was returned to operability on January 26, 2012.

A3-1

.0 Addendum Annual Report Description of Addendum 2009 Unit 2 Shield Building Radiation Monitor, 2-RM-90-400 had been reported inoperable from June 4, 2009 until July 24, 2009 in the 2009 Annual Radioactive Effluent Release Report.

Actual inoperability for the radiation monitor was from June 1, 2009 until July 24, 2009. The flow instrumentation had been erratic. Instrumentation and Controls had to call the vendor several times for assistance in troubleshooting and repair. This is to report and correct this error in the 2009 Annual Radioactive Effluent Release Report. This does not affect the reported dose.

2010 The following Condensate Demin Flow Instrumentation has been or is still inoperable:

Flow recorder 0-FR-15-456 went inoperable March 24, 2010, and was returned to service December 7, 2011.

Flow Recorders 0-FR-14-185 and 0-FR-14-192 went inoperable March 24, 2010 and are scheduled to be fixed May 8, 2012.

This equipment is obsolete, and is being replaced under an Engineering Design Change EDC 22602.

This is to report inoperability of these instruments for greater than 30 days in 2011 and correct the omission in the 2010 Annual Radioactive Effluent Release Report. This does not 1 affect the reported dose.

A4-1

ML121220250

Text

Subject:

Enclosures:

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