Text

Submittal of Annual Radioactive Effluent Release Report for 2014 Monitoring Period
	ML15125A009
Person / Time
Site:	Sequoyah
Issue date:	04/27/2015
From:	John Carlin; Tennessee Valley Authority
To:	; Document Control Desk, Office of Nuclear Material Safety and Safeguards
References
	Download: ML15125A009 (74)
	v • d • e

Tennessee Valley Authority, Post Office Box 2000, Soddy Daisy, Tennessee 37384-2000 April 27, 2015 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, 50-328, and 72-034

Subject:

Annual Radioactive Effluent Release Report for 2014 Monitoring Period Enclosed is the Annual Radioactive Effluent Release Report (ARERR) for the period of January 1 to December 31, 2014. This report (Enclosure 1) is being submitted in accordance with the respective Sequoyah Nuclear Plant (SQN), Units 1 and 2, Technical Specification (TS) 6.9.1.8 and Certificate of Compliance for Spent Fuel Storage Casks No. 1014, Section 5.4.

The Offsite Dose Calculation Manual (ODCM), Section 5.2 requires that a Radiological Impact Assessment be submitted with the ARERR for the same reporting period. The assessment is included as Enclosure 2. There were no changes to the ODCM during the reporting period.

There are no new regulatory commitments contained in this letter. If you have any questions concerning this matter, please contact Erin Henderson at (423) 843-7170.

c SRes Si President Sequoyah Nuclear Plant

Enclosures:

1. Annual Radioactive Effluent Release Report, Sequoyah Nuclear Plant, January - December 2014

2. Radiological Impact Assessment Report, Sequoyah Nuclear Plant, January - December 2014 cc (Enclosures):

NRC Regional Administrator - Region II NRC Senior Resident Inspector - Sequoyah Nuclear Plant NRR Project Manager - Sequoyah Nuclear Plant

ENCLOSURE 1 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT SEQUOYAH NUCLEAR PLANT JANUARY - DECEMBER 2014

2014 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 mnrem/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 (gCi/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 ýiCi/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-13 1, 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. lodines and Particulates Iodine and particulate activity is continuously sampled. Charcoal and particulate samples are taken from the shield and auxiliary building exhausts and analyzed at least weekly to determine the total activity released from the plant based on the average vent flow rates recorded for 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 Research 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 2014 from these non-REMP wells are listed below. Initial and follow up analyses for the semi-annual sampling procedure indicated no gamma activity.

Well ID Date Activity in pCi/L Date Activity in pCi/L Well-24 1/10/2014 <234 3/31/2014 481 Well-24 7/9/2014 603 10/28/2014 550 Well-25 3/31/2014 <226 10/28/2014 507 Well-26 3/31/2014 238 10/28/2014 387 Well-27 4/1/2014 362 10/29/2014 532 Well-28 4/1/2014 <226 10/28/2014 384 Well-29 1/9/2014 476 4/2/2014 586 Well-29 7/10/2014 614 10/29/2014 812 Well-30 7/10/2014 <226 10/30/2014 422 Well-31 1/9/2014 2079 4/2/2014 5530 Well-31 7/10/2014 5240 10/29/2014 2700 Well-32 4/2/2014 <226 10/29/2014 307 Well-34 4/1/2014 477 10/29/2014 449 Well-35 4/1/2014 <226 10/29/2014 267 GP-7A 1/10/2014 538 3/6/2013 dry GP-7A 7/11/2014 658 10/31/2014 1060 GP-10 1/9/2014 <234 4/3/2014 271 GP-10 10/30/2014 328 N/A N/A GP-13 1/9/2014 4852 4/2/2014 4270 GP-13 7/11/2014 4000 10/30/2014 4590 W-9 1/10/2014 <234 4/3/2014 <226 W-9 7/11/2014 248 10/30/2014 352 WE-10 1/9/2014 24018 2/23/2014 21240 WE-10 3/15/2014 25640 4/2/2014 26900 WE-10 5/25/2014 22690 6/29/2014 25700 WE-10 7/10/2014 24400 8/31/2014 23690 WE-10 9/30/2014 23640 10/28/2014 25360 WE-10 10/28/2014 26000 11/20/2014 26360 WE-10 12/29/2014 25060 N/A N/A El -6

Doses from 1-131 Water Ingestion 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 being reported confirm that the drinking water pathway dose from 1-131 was less than the I 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+O0 0.OOE+01 O.OOE+01 0.OOE+01 0.OOE+01 Infant/Thyroid (inrem) 0.OOE+01 0.OOE+01 O.OOE+01 O.OOE+01 0.OOE+01 Population/Thyroid 0.OOE+01 0.OOE+01 0.OOE+01 O.OOE+0I 0.OOE+01 (mrem) I El-7

V. BATCH RELEASES Value

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

a. Number of releases 83 32 Each

b. Total time period of releases 12518.00 5946.00 Minutes

c. Maximum time period of release 640.00 883.00 Minutes

d. Average time period of releases 150.82 185.81 Minutes

e. Minimum time period of release 10.00 5.00 Minutes

f. Average dilution stream flow during release periods 30448.0 31014.0 CFS

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

a. Number of releases 63 77 Each

b. Total time period of releases 241937.00 49956.00 Minutes

c. Maximum time period of release 39886.00 1403.00 Minutes

d. Average time period of releases 3840.27 648.78 Minutes

e. Minimum time period of release 48.00 11.00 Minutes VI. ABNORMAL RELEASES Value

1. Liquid 1st 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 2 0

b. Total activity released 1.44E-03 0.OOE+01 Ci El-8

Release Type: Gaseous (Steam)

Release Point: Unit 2 PORV's 2 & 3 Date(s) of Release: 2nd Quarter, 5/12/14 21:47 through 6/11/14 21:03 This evaluation is for the release to the environment that occurred from the Unit 2 PORV's 2 and 3 during the U2C 19 Refueling Outage. Following the reactor trip, the Steam Generator PORVs were open for periods of time during the Outage. The following is data used to determine the curies and dose impacts as a result of the release:

" The evaluation assumed the release was continuous from PORV's 2 and 3 only.

" There have been no gamma emitting radionuclides identified in any Secondary Coolant samples during the previous cycle.

The volume of each steam generator was taken from Westinghouse Guidelines for Secondary Water Chemistry. The listed normal water level value of 3516 ft3 was used as a conservative value. This calculation assumes that the total volume of all four generators was released and that all the tritium present in that initial volume was released. The calculation for the total tritium activity released is as follows:

3379 ft3/generator

2.832E+04 mi/ft3

2 generators = 1.914E+08 ml 3.76E-06 jiCi/ml

1.914E+08 ml = 7.20E+02 j.Ci of H3 or 7.20E-04 Ci of H3 The activity of 7.20E-04 curies was added to the 2nd Quarter Table "Curies Released in Gaseous Ground Level Releases," and the 2nd Quarter doses in Table "Doses from Airborne Effluents."

Individual Doses Pathway Dose Quarterly Percent of Location External Limit Limit Sector/Distance/Unit Gamma Air 0.OOE+00 mrad 5 mrad <1 N/1525/meters Beta Air O.OOE+00 mrad 10 mrad <1 N/1525/meters Submersion Total Body O.OOE+00 mrad 10 mrad <1 N/1389/meters Skin 0.OOE+00 mrad 10 mrad <1 N/1389/meters Organ Dose Child/Thyroid 8.61E-03 mrem 7.5 mrem <1 N/1000/meters Child/Total Body 8.61E-03 mrem 7.5 mrem <1 N/1000/meters Population Doses Total Body Dose 9.5 1E-03 man-rem Maximum Organ Dose (organ) 9.51 E-03 man-rem (Thyroid)

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Release Type: Gaseous (Steam)

Release Point: Unit 2 PORV's 1 & 4 Date(s) of Release: 4th Quarter, 6/2/14 13:26 through 6/11/14 21:23 This evaluation is for the release to the environment that occurred from the Unit 2 PORV's 1 and 4 during the U2Cl19 Refueling Outage. Following the reactor trip, the Steam Generator PORVs were open for periods of time during the Outage. The following is data used to determine the curies and dose impacts as a result of the release:

" The evaluation assumed the release was continuous from PORV's 1 and 4 only.

There have been no gamma emitting radionuclides identified in any Secondary Coolant samples during the previous cycle.

The volume of each steam generator was taken from Westinghouse Guidelines for Secondary Water Chemistry. The listed normal water level value of 3516 ft3 was used as a conservative value. This calculation assumes that the total volume of all four generators was released and that all the tritium present in that initial volume was released. The calculation for the total tritium activity released is as follows:

3379 ft3/generator

2.832E+04 mi/ft3

2 generators = 1.914E+08 ml 3.76E-06 gjCi/ml

1.914E+08 ml = 7.20E+02 ltCi of H3 or 7.20E-04 Ci of H3 The activity of 7.20E-04 curies was added to the 2nd Quarter Table "Curies Released in Gaseous Ground Level Releases," and the 2nd Quarter doses in Table "Doses from Airborne Effluents."

Individual Doses Pathway Dose Quarterly Percent of Location External Limit Limit Sector/Distance/Unit Gamma Air O.OOE+00 mrad 5 mrad <1 N/1525/meters Beta Air 0.OOE+00 mrad 10 mrad <1 N/1525/meters Submersion Total Body 0.OOE+00 mrad 10 mrad <1 N/1389/meters Skin 0.OOE+00 mrad 10 mrad <1 N/1389/meters Organ Dose Child/Thyroid 8.6 1E-03 mrem 7.5 mrem <1 N/1000/meters Child/Total Body 8.61 E-03 mrem 7.5 mrem <1 N/1000/meters Population Doses Total Body Dose 9.51 E-03 man-rem Maximum Organ Dose (organ) 9.5 1E-03 man-rem (Thyroid)

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Liquid Effluents-Summation of Releases During the Period Starting: 1-Jan-2014 Ending: 30-Jun-2014 Est.

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

1. Total Release (Not Including Tritium, Gases, Alpha) Ci 3.64E-03 2.98E-03 18%

2. Average Diluted Concentration During Period gtCi/ml 2.04E-09 1.49E-09

3. Percent Of Applicable Limit %*

B. Tritium

1. Total Release Ci 2.03E+02 3.48E+02 18%

2. Average Diluted Concentration During Period pCi/ml 1.14E-04 1.74E-04

3. Percent Of Applicable Limit % *

C. Dissolved And Entrained Gases

1. Total Release Ci 0.OOE+01 2.13E-04 39%

2. Average Diluted Concentration During Period gtCi/ml O.OOE+01 1.07E-10

3. Percent Of Applicable Limit % O.OOE+01 5.34E-05 D. Gross Alpha Radioactivity

1. Total Release Curies 0.00E+01** 0.OOE+01 N/A***

E. Total Waste Volume Released Liters 1.35E+08 1.76E+08 4%

(Pre-Dilution)

F. Volume Of Dilution Water Used Liters 1.65E+09 1.82E+09 4%

G. Radwaste Volume Released Liters 1.11 E+06 2.15E+06 N/A

Applicable Limits are expressed in terms of dose. See Tables 5-8 of the 2014 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-2014 Ending: 3 1-Dec-2014 Est.

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

1. Total Release (Not Including Tritium, Gases, Alpha) Ci 1.09E-03 6.66E-04 18%

2. Average Diluted Concentration During Period jiCi/ml 4.94E-10 3.95E-10

3. Percent Of Applicable Limit % *

B. Tritium

1. Total Release Ci 3.51E+O1 9.27E+01 18%

2. Average Diluted Concentration During Period jiCi/ml 1.60E-05 5.50E-05

3. Percent Of Applicable Limit % *

C. Dissolved And Entrained Gases

1. Total Release Ci O.OOE+01 O.OOE+01 39%

2. Average Diluted Concentration During Period uCi/ml O.OOE+01 O.OOE+01

3. Percent Of Applicable Limit % O.OOE+01 O.OOE+O1 D. Gross Alpha Radioactivity

1. Total Release Curies 0.00E+01** O.OOE+01 N/A***

E. Total Waste Volume Released Liters 7.02E+07 6.66E+07 4%

(Pre-Dilution)

F. Volume Of Dilution Water Used Liters 2.13E+09 1.62E+09 4%

G. Radwaste Volume Released Liters 6.99E+05 2.24E+05 N/A

Applicable Limits are expressed in terms of dose. See Tables 5-8 of the 2014Radiological 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: l-Jan-2014 Ending 31-Mar-2014 Continuous Batch Total Tritium 2.50E-01 2.03E+02 2.03E+02 FISSION & ACTIVATION PRODUCTS Colbalt-57 O.OOE+01 1.61E-06 1.61E-06 Colbalt-58 O.OOE+O1 6.06E-04 6.06E-04 Colbalt-60 O.OOE+01 1.17E-03 1.17E-03 Cesium-137 O.OOE+O 1 9.63E-05 9.63E-05 Iron-55 O.OOE+01 7.03E-04 7.03E-04 Manganese-54 O.OOE+01 9.49E-06 9.49E-06 Sodium-24 O.OOE+01 5.62E-06 5.62E-06 Antimony- 124 O.OOE+01 3.82E-04 3.82E-04 Antimony- 125 O.OOE+01 2.37E-04 2.37E-04 TOTALS O.OOE+01 3.21E-03 3.21E-03 DISSOLVED AND ENTRAINED GASES TOTALS O.OOE+01 O.OOE+O1 O.OOE+01

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-2014 Ending 30-Jun-2014 Continuous Batch Total Tritium 3.18E-01 3.48E+C2 3.48E+02 FISSION & ACTIVATION PRODUCTS Cobalt-58 O.OOE+01 5.98E-0 4 5.98E-04 Cobalt-60 O.OOE+01 8.07E-0 5 8.07E-5 Cseium-137 O.OOE+01 1.12E-0 5 Iron-55 O.OOE+01 1.20E-0 4 1.20E-04 Antimony-125 O.OOE+O1 1.49E-0 5 1.49E-05 TOTALS O.OOE+01 8.25E-0 4 8.25E-04 DISSOLVED AND ENTRAINED GASES Xenon-133 O.OOE+01 2.14E-04 2.14E-04 TOTALS O.OOE+O I 2.14E-04 2.14E-04

Zeroes indicate that no activity was present at detectable levels.

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Curies Released in Liquid Effluents During the period Starting: l-Jul-2014 Ending 30-Sep-2014 Continuous Batch Total Tritium 2.28E-01 3.49E+O1 3.5 1E+O1 FISSION & ACTIVATION PRODUCTS Cobalt-58 O.OOE+01 6.77E-04 6.77E-04 Cobalt-60 O.OOE+01 4.02E-05 4.02E-05 Iron-55 O.OOE+01 2.53E-05 2.53E-05 Antimony-125 O.OOE+01 8.47E-06 8.47E-06 TOTALS O.OOE+01 7.5 1E-04 7.5 1E-04 DISSOLVED AND ENTRAINED GASES TOTALS O.OOE+01 O.OOE+01 O.OOE+01

Zeroes indicate that no activity was present at detectable levels.

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Curies Released in Liquid Effluents During the period Starting: l-Oct-2014 Ending 31-Dec-2014 Continuous Batch Total Tritium 2.43E-01 9.24E+01 9.27E+01 FISSION & ACTIVATION PRODUCTS Cobalt-58 O.OOE+01 4.27E-04 4.27E-04 Cobalt-60 O.OOE+O 1 6.83E-05 6.83E-05 Cesium- 137 O.OOE+01 3.73E-06 3.73E-06 Iron-55 O.OOE+01 1.09E-04 1.09E-04 Antimony- 125 O.OOE+O 1 1.26E-04 1.26E-04 TOTALS O.OOE+01 7.34E-04 7.34E-04 DISSOLVED AND ENTRAINED GASES TOTALS O.OOE+01 O.OOE+01 O.OOE+01

Zeroes indicate that no activity was present at detectable levels.

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TABLE A LIQUID "TYPICAL LLD" EVALUATION("

At,21 Nuclide ODCM LLD 1 hr 8 hr 32 hr Manganese-54 5.OE-07 3.36E-08 3.36E-08 3.37E-08 Cobalt-58 5.OE-07 2.53E-08 2.54E-08 2.56E-08 Iron-59 5.OE-07 5.26E-08 5.29E-08 5.37E-08 Cobalt-60 5.OE-07 4.63E-08 4.63E-08 4.64E-08 Zinc-65 5.OE-07 2.95E-08 2.95E-08 2.96E-08 Molybdenum-99 5.OE-07 1.55E-07 1.67E-07 2.15E-07 Cesium- 134 5.OE-07 1.9 1E-08 1.91 E-08 1.92E-08 Cesium- 137 5.OE-07 3.87E-08 3.87E-08 3.87E-08 Cerium- 141 5.OE-07 2.80E-08 2.81 E-08 2.87E-08 Cerium- 144 5.OE-06 1.11 E-07 1.12E-07 1.12E-07 Iodine- 131 .OE-06 2.28E-08 2.34E-08 2.55E-08 Krypton-87 .OE-05 1.16E-07 5.25E-07 (3)

Krypton-88 1OE-05 9.95E-08 5.49E-07 (3)

Xenon-133 .OE-05 4.19E-08 4.36E-08 4.98E-08 Xenon-133m .OE-05 1.42E-07 i.55E-07 2.13E-07 Xenon- 135 1OE-05 2.06E-08 3.50E-08 2.17E-07 Xenon-138 .OE-05 8.37E-06 (3) (3)

Nuclide ODCM LLD Typical LLD Tritium 1.OE-05 1.2E-06 Gross Alpha 1.OE-07 2.OE-08 Strontium-89/90 5.OE-08 3.8E-08/1.4E-08 Iron-55 I.OE-06 1.3E-08 NOTES: (1) LLD values are in ptCi/ml.

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

(3) T V2 too short.

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Gaseous Effluents - Summation of Releases During the Period Starting: 1-Jan-2014 Ending: 30-Jun-2014 Type of Effluent Units Quarter 1 Quarter 2 Estimated Total Error A. Fission and Activation Products

1. Total Release Ci 2.28E+O1 5.64E+O1 11%

2. Average Release Rate For Period pCi/sec 2.94E+00 7.18E+00

3. Percent of Applicable Limit % *

B. Radioiodines

1. Total Iodine-131 Ci O.OOE+01 O.OOE+O1 N/A***

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

3. Percent of Applicable Limit % *

C. Particulates

1. Particulates (Half-Lives > 8 Days) Ci 1.03E-06 O.OOE+01 N/A***

2. Average Release Rate For Period pCi/sec 1.33E-07 O.OOE+01

3. Percent of Applicable Limit %* *

4. Gross Alpha Radioactiviy Ci O.OOE+01 O.OOE+O1 D. Tritium

1. Total Release Ci 4.48E+01 1.53E+01 15%

2. Average Release Rate For Period pCi/sec 5.76E+00 1.94E+00

3. Percent of Applicable Limit %*

E. Carbon-14

1. Total Release Ci 1.12E+00 8.73E-01 N/A

2. Average Release Rate For Period gCi/sec 1.38E-01 1.39E-01

3. Percent of Applicable Limit % * *

Applicable Limits are expressed in terms of dose. See Tables 1-4 of the2014 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-2014 Ending: 31-Dec-2014 Type of Effluent Units Quarter 3 Quarter 4 Estimated Total Error A. Fission and Activation Products

1. Total Release Ci 1.46E+00 9.76E+00 11%

2. Average Release Rate For Period gCi/sec 1.84E-01 1.23E+00

3. Percent of Applicable Limit %*

B. Radioiodines Ci 0.OOE+01 0.OOE+01 N/A***

1. Total Iodine-131

2. Average Release Rate For Period gCi/sec O.OOE+01 0.EOO+01

3. Percent of Applicable Limit % *

C. Particulates

1. Particulates (Half-Lives > 8 Days) Ci O.OOE+01 8.87E-05 16%

2. Average Release Rate For Period gCi/sec 0.OOE+01 1.1 2E-05

3. Percent of Applicable Limit % * *

4. Gross Alpha Radioactiviy Ci 0.OOE+O0 0.OOE+01 D. Tritium

1. Total Release Ci 9.OOE+00 4.16E+00 15%

2. Average Release Rate For Period [tCi/sec 1.13E+00 5.65E-01

3. Percent of Applicable Limit % *

E. Carbon-14

1. Total Release Ci 1.15E+00 1.15E-01 N/A

2. Average Release Rate For Period pCi/sec 1.48E-01 1.48E-01

3. Percent of Applicable Limit % * *

Applicable Limits are expressed in terms of dose. See Tables 1-4 of the2014 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-2014 Ending: 31-Mar-2014 CONTINUOUS BATCH TOTAL FISSION GASES Xenon-133 O.OOE+O I 1.91 E+00 1.91 E+00 Xenon-135 O.OOE+01 3.33E-01 3.33E-01 Argon-4 I O.OOE+OI 2.06E+01 2.06E+O I TOTALS O.OOE+O 1 2.28E+OI 2.28E+01 IODINES Iodine- 131 O.OOE+01 O.OOE+01 O.OOE+01 TOTALS O.OOE+01 O.OOE+O I O.OOE+01 PARTICULATES Colbalt-58 1.03E-06 O.OOE+01 1.03E-06 Bromine-82 2.76E-05 O.OOE+01 2.76E-05 TOTALS 2.76E-05 O.OOE+OI 2.76E-05 TRITIUM Tritium 1.26E+01 3.22E+01 4.48E+01 CARBON- 14 Carbon-14 (CO, form) 1.12E+00 O.OOE+00 1.12E+00 Carbon-14 (Total) 5.714E+00 O.OOE+00 5.714E+00

Zeros indicate that no radioactivity was present at detectable levels.

E 1-20

Curies released Gaseous Ground Level Releases During the period Starting: 1-Apr-2014 Ending: 30-Jun-2014 CONTINUOUS BATCH TOTAL FISSION GASES Xenon-133 O.OOE+01 2.74E-0 I 2.74E-01 Xenon-135 O.OOE+O I 3.70E+O I 3.70E+O1 Argon-41 O.OOE+01 1.91E+01 1.91E+O1 TOTALS O.OOE+01 5.64E+01 5.64E+01 IODINES TOTALS O.OOE+O1 O.OOE+O 1 O.OOE+O 1 PARTICULATES Bromine-82 1.70E-06 O.OOE+01 1.70E-06 TOTALS 1.70E-06 O.OOE+01 1.70E-06 TRITIUM Tritium 5.78E+00 9.49E+00 1.53E+01 CARBON-14 Carbon-14 (CO 2 form) 0.873E+00 O.OOE+00 0.873E+00 Carbon-14 (Total) 4.45E+00 O.OOE+00 4.45E+/-00

Zeros indicate that no radioactivity was present at detectable levels.

El -21

Curies released Gaseous Ground Level Releases During the period Starting: 1-July-2014 Ending: 30-Sep-2014 CONTINUOUS BATCH TOTAL FISSION GASES Xenon- 133 1.09E+00 2.84E-02 1.12E+00 Xenon- 135 O.OOE+01 7.82E-04 7.82E-04 Argon-41 O.OOE+01 3.38E-01 3.38E-01 TOTALS 1.09E+00 3.67E-01 1.46E+00 IODINES TOTALS O.OOE+01 O.OOE+01 O.OOE+01 PARTICULATES Bromine-82 2.07E-06 O.OOE+0 l 2.07E-06 TOTALS 2.07E-06 O.OOE+O I 2.07E-06 TRITIUM Tritium 8.66E+00 3.38E-0 I 9.OOE+00 CARBON-14 Carbon- 14 (CO, form) 1.15E+00 O.OOE+00 1.15E+00 Carbon- 14 (Total) 5.84E+00 O.OOE+O0 5.84E+00

Zeros indicate that no radioactivity was present at detectable levels.

E 1-22

Curies released Gaseous Ground Level Releases During the period Starting: 1-Oct-2014 Ending: 31-Dec-2014 CONTINUOUS BATCH TOTAL FISSION GASES Xenon-133 9.04E+00 8.54E-02 9.13E+00 Xenon- 135 O.OOE+O 1 6.11 E-03 6.11 E-03 Argon-41 O.OOE+01 6.26E-01 6.26E-01 TOTALS 9.04E+00 7.18E-01 9.76E+00 IODINES TOTALS O.OOE+O I O.OOE+O I O.OOE+O I PARTICULATES TOTALS O.OOE+01 O.OOE+01 O.OOE+01 TRITIUM Tritium 3.9 1E+00 2.54E-01 4.16E+00 CARBON-14 Carbon-14 (CO 2 form) 1.15E+00 O.OOE+00 1.15E+00 Carbon- 14 (Total) 5.85E+00 O.OOE+00 5.85E+00

Zeros indicate that no radioactivity was present at detectable levels.

E 1-23

TABLE B GASEOUS "TYPICAL" LLD EVALUATION(')

Noble Gas At12)

Nuclide ODCM LLD I hr 1.5 hr Krypton-87 L.OE-04 2.08E-06 2.73E-06 Krypton-88 1.OE-04 1.61E-06 1.81 E-06 Xenon-133 L.OE-04 6.61E-07 6.63E-07 Xenon-133m L.OE-04 2.34E-06 2.35E-06 Xenon-135 1.OE-04 3.43E-07 3.56E-07 Xenon-138 1.OE-04 1.40E-04 6.1OE-04 Particulate Sample 3) 1 hr 24 hr 7.0 day Manganese-54 LOE-I0 7.47E-12 3.12E-13 4.48E-14 Cobalt-58 !OE-10 5.62E-12 2.35E-13 3.46E-14 Iron-59 1OE-10 1.20E- I 5.02E-13 7.49E-14 Cobalt-60 L.OE-l0 1.07E-1 1 4.46E-13 6.38E-14 Zinc-65 LOE-10 6.71E-12 2.80E-13 4.03E-14 Molybdenum-99 LOE-10 3.43E-1 1 1.61 E- 12 4.70E- 13 Cesium-134 .OE-10 4.25E-12 1.77E-13 2.54E-14 Cesium-137 .OE-10 8.48E- 12 3.54E- 13 5.05E-14 Cerium-141 .OE-10 5.10E-12 2.15E-13 3.26E-14 Cerium-144 L.OE-10 2.01E-1 I 8.33E-13 1.20E-13 Iodine-131 .OE-10 4.76E-12 2.07E-13 3.77E-14 Charcoal Sample Iodine-131 1.OE- I I 7.25E-12 3.15E-13 5.74E-14 Note:

(1) LLD values are in jtCi/ml.

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

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

E 1-24

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

Nuclide ODCM LLD Typical LLD Tritium LOE-06 L.OE-I I Gross Alpha 1.OE-II 1.5E-14 Strontium-89 LOE- I1 1.OE-14 Strontium-90 I.OE- II 1.OE- 15 NOTE:

(1) LLD values are in p.Ci/cc.

E1-25

SOLID WASTE (RADIOACTIVE SHIPMENTS)

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

1. Type of Waste Unit Period Error %

a. Spent Resins, Filter Sludges, Evaporator Bottoms, m3 5.64 +I.00E+01 etc. Ci 6.80E+02 +2.29E+01

b. Dry Active Waste, Compressible Waste mn3 494 _+1.00E+01 Contaminated Equipment, etc. Ci 1.06E+03 +2.29E+01

c. Irradiated Components, Control m3 None N/A Rods, etc. Ci None N/A 3

d. Other: Mechanical Filters mn 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-26

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 5.398E-03 0.01

2. Carbon-14 4.608E-02 0.07

3. Chlorine-36 6.500E-06 0.00

4. Manganese-54 3.007E+00 4.43

5. Iron-55 1.066E+01 15.69

6. Cobalt-57 3.283E-01 0.48

7. Cobalt-58 7.030E+00 10.35

8. Cobalt-60 2.004E+01 29.49

9. Nickel-59 3.050E-01 0.45

10. Nickel-63 2.564E+01 37.73

11. Zinc-65 3.873E-01 0.57

12. Strontium-85 6.710E-12 0.00

13. Strontium-89 3.386E-03 0.00

14. Strontium-90 1.718E-03 0.00

15. Yttrium-88 1.370E-09 0.00

16. Yttrium-90 6.140E-28 0.00

17. Technicium-99 1.650E-07 0.00

18. Cadmium-109 4.520E-06 0.00

19. Tin-113 1.140E-09 0.00

20. Antimony- 125 9.250E-03 0.01

21. Cesium-134 4.550E-04 0.00

22. Cesium-137 2.498E-01 0.37

23. Barium-133 4.417E-07 0.00

24. Cerium- 139 2.250E-09 0.00

25. Cerium-144 2.258E-01 0.33

26. Europium-152 3.513E-07 0.00

27. Mercury-203 5.060E-14 0.00

28. Lead-210 5.027E-05 0.00

29. Plutonium-238 2.123E-05 0.00

30. Plutonium-239 4.339E-06 0.00

31. Plutonium-240 4.339E-06 0.00

32. Plutonium-241 9.909E-03 0.01

33. Americium-241 1.840E-05 0.00

34. Curium-243 1.572E-05 0.00

35. Curium-244 1.570E-05 0.00 EI-27

SOLID WASTE (RADIOACTIVE SHIPMENTS) (continued)

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

Curies Percent

1. Hydrogen-3 5.379E-03 0.51

2. Carbon-14 2.542E-02 2.40

3. Manganese-54 1.715E-02 1.62

4. Iron-55 3.823E-01 36.15

5. Cobalt-58 1.238E-02 1.17

6. Cobalt-60 4.443E-01 42.00

7. Nickel-63 1.364E-01 12.90

8. Zinc-65 3.626E-03 0.34

9. Strontium-90 7.288E-04 0.07

10. Niobium-95 3.578E-03 0.34

11. Cesium-137 1.987E-02 1.88

12. Cesium- 144 6.629E-03 0.63

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

d. Other: Mechanical Filters Curies Percent None N/A N/A El-28

SOLID WASTE (RADIOACTIVE SHIPMENTS) (continued)

3. Solid Waste Disposition

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

Number of Shipments Type Quantity Mode of Transportation Destination Type B Motor Freight Waste Control Specialists TSD Facility Andrews, TX A-LSA 11 Motor Freight Waste Control Specialists Compact Waste Disposal Facility Andrews, TX

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

Number of Shipments Type Quantity Mode of Transportation Destination 3 A-LSA II Motor Freight EnergySolutions Processing Facility Oak Ridge, TN 6 A-LSA II Motor Freight TOXCO Materials Management Center Oak Ridge, TN 4 A-LSA II Motor Freight Veoila ES ALARON WMG Processing Wampum, PA 5 A-LSA II Motor Freight EnergySolutions Limited Quantity Processing Facility Oak Ridge, TN 4 A-LSA II Motor Freight TOXCO Materials Limited Quantity Management Center Oak Ridge, TN Limited Quantity Motor Freight TOXCO Materials Management Center Oak Ridge, TN

c. Irradiated components, control rods, etc.

Number of Shipments Type NAMode Quantity of TransportationI Destination None N/A N/A N/A

d. Other: Mechanical Filters Number of Shipments Type Quantity Mode of Transportation Destination None N/A N/A N/A

4. Irradiated Fuel Shipments (Disposition)

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

5. Solidification of Waste Was solidification performed? No If yes, solidification media: N/A EI-29

Independent Spent Fuel Storage Installation SQN implemented use of an independent spent fuel storage installation (ISFSI) on July 13, 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). 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 nirem/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-30

ENCLOSURE 2 RADIOLOGICAL IMPACT ASSESSMENT REPORT SEQUOYAH NUCLEAR PLANT JANUARY - DECEMBER 2014

2014 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 I 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.

ExternalExposure 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 dosimeters deployed around SQN as part of the offsite REMP. The quarterly gamma radiation levels determined from these dosimeters during this reporting period averaged approximately 15.75 mrem/quarter at onsite (at or near the site boundary) stations and approximately 14.50 mrem/quarter at offsite stations, or approximately 1.25 mrem/quarter higher at onsite than at offsite stations. This difference is consistent with levels measured for preoperation and construction phases of the TVA nuclear plant site where the average radiation levels onsite were generally 1-3 mrem/quarter higher than the levels offsite. This may be attributable to natural variations in environmental radiation levels, earth moving activities onsite, the mass of concrete employed in the construction of the plants, or other undetermined influences. Fluctuations in natural background dose rates and in dosimeter readings tend to mask any small increments which may be due to plant operations.

E2-5

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 dosimeter measurements for the calendar year in question indicate that the highest onsite dosimeter reading was 84 mrem. Using this value, and subtracting an annual background value of 63 mrem/year (from perimeter dosimeters around Sequoyah from Area dosimeter posting data for the year), and multiplying by the ratio of the occupancy times (2000/8760), the external dose was 4.8 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 I and 2 Doses from Airborne Effluents First Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distance/Unit External Gamma Air 3.OOE-02 mrad 5 mrad <1 NNE/1300 Beta Air 1.1OE-02 mrad 10 mrad <1 NNE/1300 Submersion Total Body 1.29E-02 mrad 10 mrad <1 SSW/2129/meters Skin 1.91E-02 mrad 10 mrad <1 SSW/2129/meters Organ DosesI (Max) Child/Bone 6.77E-01 mrem 7.5 mrem 9.03 N/1000/meters Child/Thyroid 1.89E-01 mrem 7.5 mrem 2.52 N/I000/meters Child/Total Body 1.89E-01 mrem 7.5 mrem 2.52 N/1000/meters Population Doses Total Body Dose 1.81 E-0 I man-rem Maximum Organ Dose (organ) 6.71E-01 man-rem (Bone)

Second Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distance/Unit External Gamma Air 4.66E-02 mrad 5 mrad <1 NNE/1300/meters Beta Air 2.98E-02mrad 10 mrad <1 NNE/1300/meters Submersion Total Body 2.43E-02mrad 10 mrad <1 NNW/864/meters Skin 4.12E-02 mrad 10 mrad <1 NNW/864/meters Organ Doses' (Max) Child/Bone 7.72E-01 mrem 7.5 mrem 10.3 N/1000/meters Child/Thyroid 2.12E-01 mrem 7.5 mrem 2.83 N/1000/meters Child/Total Body 2.12E-01 mrem 7.5 mrem 2.83 N/1000/meters Population Doses Total Body Dose 1.41 E-0 I man-rem Maximum Organ Dose (organ) 5.75E-01 man-rem (Bone)

Populationdoses can be compared to the naturalbackground dose for the entire 50-mile population of about 95,400 man-remn/year (based on 90 mremAyear for naturalbackground).

'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 4.63E-04 mrad 5 mrad <I NNE/1300/meters Beta Air 3.17E-04 mrad 10 mrad <1 NNE/1300/meters Submersion Total Body 3.3 1E-04 mrad 10 mrad <1 S/1764/meters Skin 5.22E-04 mrad 10 mrad <1 S/1764/meters Organ Doses' (Max) Child/Bone 8.85E-01 mrem 7.5 mrem 11.8 S/2000/meters Child/Thyroid 1.83E-01 mrem 7.5 mrem 2.44 S/2000/meters Child/Total Body 1.83E-01 mrem 7.5 mrem 2.44 S/2000/meters Population Doses Total Body Dose 1.52E-01 man-rem Maximum Organ Dose (organ) 7.1 lE-01 man-rem (Bone)

Fourth Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distance/Units External Gamma Air 1.27E-03 mrad 5 mrad <I NE/1250/meters Beta Air 1.75E-03 mrad 10 mrad <1 NE/1250/meters Submersion Total Body 8.77E-04 mrad 10 mrad <1 S/1764/meters Skin 1.59E--03 mrad 10 mrad <1 S/1764/meters Organ Doses' (Max) Child/Bone 9.07E-01 mrem 7.5 mrem 12.1 S/2000/meters Child/Thyroid 1.85E-01 mrem 7.5 mrem 2.47 S/2000/meters Child/Total Body 1.85E-01 mrem 7.5 mrem 2.47 S/2000/meters Population Doses Total Body Dose 7.07E-01 man-rem Maximum Organ Dose (organ) 1.46E-0 I man-rem (Bone)

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

'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 (mremr)

Quarterly Percent of Age Group Organ Dose Limit Limit Child Total Body 5.40E-04 1.5 mrem <1%

Child Liver 5.60E-04 5 mrem <1 %

Child Thyroid 5.40E-04 5 mrem < 1%

Average Riverflow past SQN (cubic feet per second): 46166 Population Doses Total Body Dose 5.1OE-02 man-rem Maximum Organ Dose (organ) 5.1OE-02 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 2.80E-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): 14729 Population Doses Total Body Dose 2.40E-0 Iman-rem Maximum Organ Dose (organ) 2.40E-01 man-rem (GIT, Bone, Thyroid, Liver Kidney, Lung)

Populationdoses can be compared to the naturalbackgrounddose for the entire 50-mile population of about 95,400 man-remnA'ear(based on 90 inrein/yearfor naturalbackground).

E2-9

Tables 7 and 8 Doses from Liquid Effluents Third Quarter Individual Doses (mremr Quarterly Percent of Age Group Organ Dose Limit Limit Child Total Body 1.80E-04 1.5 mrem <I%

Child Liver 1.80E-04 5 mrem < 1%

Child Thyroid 1.80E-04 5 mrem <1 %

Average Riverflow past SQN (cubic feet per second): 23852 Population Doses Total Body Dose 1.60E-02man-rem Maximum Organ Dose (organ) 1.60E-02 man-rem (GIT, Bone, Thyroid, Liver Kidney, Lung)

Fourth Quarter Individual Doses (mrem_)

Quarterly Percent of Age Group Organ Dose Limit Limit Child Total Body 2.90E-04 1.5 mrem <1%

Child Liver 2.90E-04 5 mrem <I%

Child Thyroid 2.90E-04 5 mrem <I%

J L A Average Riverflow past SQN (cubic feet per second): 38172 Population Doses Total Body Dose 2.60E-02 man-rem Maximum Organ Dose (organ) 2.60E-02 man-rem (Bone, Liver, GIT, Thyroid, Kidney, Lung)

Populationdoses can be compared to the naturalbackground dose for the entire 50-mile population of about 95,400 man-rem/year (based on 90 mrem/yearfor 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 3.OOE-02 4.66E-02 4.63 E-04 1.27E-03 Critical organ dose (air) 6.77E-01 7.72E-01 8.85E-01 9.07E-0I Total body dose (liquid) 5.40E-04 2.80E-03 1.80E-04 2.90E-04 Maximum organ dose (liquid) 5.40E-04 2.80E-03 1.80E-04 2.90E-04 Direct Radiation Dose 0.OOE-00 0.OOE-00 0.OOE-00 O.OOE-00 Total 7.08E-01 8.24E-01 8.86E-01 9.09E-0 l Cumulative Total Dose (Total body or any other organ) mrem 3.33E+00 Annual Dose Limit (mrern) 25 Percent of Limit 13.3 Thyroid Dose (mrem)

Total body air submersion 3.00E-02 4.66E-02 4.63E-04 1.27E-03 Thyroid dose (airborne) 1.89E-01 2.12E-01 1.85E-01 1.85E-01 Total body dose (liquid) 5.40E-04 2.80E-03 1.80E-04 2.90E-04 Thyroid dose (liquid) 5.60E-04 2.80E-03 1.80E-04 2.90E-04 Direct Radiation Dose 0.OOE-00 0.OOE-00 O.OOE-00 0.OOE-00 Total 2.20E-01 2.64E-01 I1.86E-01 1.87E-01 Cumulative Total Dose (Thyroid) mrem 8.57E-01 Annual Dose Limit (tnrero) 75 Percent of Limit 1.14 E2-11

Attachment 1.0 Joint Frequency Distribution Tables Al-i

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

SEQUOYAH NUCLEAR PLANT JAN 1, 2014 - MAR 31, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000 0.000 0.000 0.093 0.279 0.419 0.000 0.000 0.000 0.792 NNE 0.000 0.000 0.000 0.233 0.838 0.466 0.000 0.000 0.000 1.537 NE 0.000 0.000 0.000 0.419 0.699 0.279 0.000 0.000 0.000 1.397 ENE 0.000 0.000 0.000 0.186 0.047 0.000 0.000 0.000 0.000 0.233 E 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.000 0.093 ESE 0.000 0.000 0.000 0.093 0.047 0.000 0.000 0.000 0.000 0.140 SE 0.000 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.093 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.140 0.000 0.000 0.000 0.140 SSW 0.000 0.000 0.000 0.000 0.186 0.373 0.000 0.000 0.000 0.559 SW 0.000 0.000 0.000 0.047 0.093 0.047 0.000 0.000 0.000 0.186 WSW 0.000 0.000 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.093 W 0.000 0.000 0.000 0.047 0.093 0.140 0.000 0.000 0.000 0.279 WNW 0.000 0.000 0.000 0.000 0.047 0.140 0.000 0.000 0.000 0.186 NW 0.000 0.000 0.000 0.000 0.000 0.140 0.000 0.000 0.000 0.140 NNW 0.000 0.000 0.000 0.047 0.000 0.140 0.000 0.000 0.000 0.186 SUBTOTAL 0.000 0.000 0.000 1.304 2.422 2.329 0.000 0.000 0.000 6.055 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2147 TOTAL HOURS OF STABILITY CLASS A 130 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 130 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2147 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/05/07 MEAN WIND SPEED = 7.06 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, 2014 - MAR 31, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000 0.000 0.000 0.047 0.047 0.373 0.000 0.000 0.000 0.466 NNE 0.000 0.000 0.000 0.186 0.279 0.093 0.000 0.000 0.000 0.559 NE 0.000 0.000 0.093 0.093 0.140 0.047 0.000 0.000 0.000 0.373 ENE 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 E 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.000 0.093 ESE 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 SE 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.047 0.000 0.000 0.047 0.000 0.000 0.000 0.093 SSW 0.000 0.000 0.000 0.047 0.419 0.373 0.000 0.000 0.000 0.838 SW 0.000 0.000 0.000 0.047 0.093 0.093 0.000 0.000 0.000 0.233 WSW 0.000 0.000 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.093 W 0.000 0.000 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.093 WNW 0.000 0.000 0.000 0.000 0.047 0.093 0.047 0.000 0.000 0.186 NW 0.000 0.000 0.000 0.000 0.047 0.140 0.047 0.000 0.000 0.233 NNW 0.000 0.000 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.093 SUBTOTAL 0.000 0.000 0.140 0.652 1.164 1.444 0.093 0.000 0.000 3.493 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2147 TOTAL HOURS OF STABILITY CLASS B 75 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 75 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2147 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/05/07 MEAN WIND SPEED = 7.14 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A1-3

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

SEQUOYAH NUCLEAR PLANT JAN 1, 2014 - MAR 31, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000 0.000 0.000 0.093 0.279 0.186 0.000 0.000 0.000 0.559 NNE 0.000 0.000 0.140 0.140 0.419 0.233 0.000 0.000 0.000 0.932 NE 0.000 0.000 0.233 0.233 0.047 0.186 0.000 0.000 0.000 0.699 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.047 0.093 0.000 0.000 0.000 0.000 0.000 0.140 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 SSE 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.093 S 0.000 0.000 0.000 0.140 0.047 0.047 0.000 0.000 0.000 0.233 SSW 0.000 0.000 0.000 0.326 0.652 0.093 0.000 0.000 0.000 1.071 SW 0.000 0.000 0.000 0.466 0.699 0.093 0.000 0.000 0.000 1.258 WSW 0.000 0.000 0.047 0.000 0.000 0.047 0.000 0.000 0.000 0.093 W 0.000 0.000 0.000 0.093 0.047 0.047 0.000 0.000 0.000 0.186 WNW 0.000 0.000 0.047 0.047 0.000 0.000 0.093 0.000 0.000 0.186 NW 0.000 0.000 0.000 0.093 0.000 0.279 0.047 0.000 0.000 0.419 NNW 0.000 0.000 0.000 0.000 0.140 0.233 0.000 0.000 0.000 0.373 SUBTOTAL 0.000 0.000 0.605 1.770 2.329 1.444 0.140 0.000 0.000 6.288 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2147 TOTAL HOURS OF STABILITY CLASS C 135 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 135 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2147 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/05/07 MEAN WIND SPEED = 6.38 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, 2014 - MAR 31, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000 0.000 0.559 1.118 1.444 2.329 0.000 0.000 0.000 5.449 NNE 0.000 0.047 0.978 2.422 2.608 3.074 0.000 0.000 0.000 9.129 NE 0.000 0.186 0.745 0.512 0.186 0.233 0.000 0.000 0.000 1.863 ENE 0.000 0.093 0.140 0.000 0.000 0.000 0.000 0.000 0.000 0.233 E 0.000 0.000 0.279 0.047 0.000 0.000 0.000 0.000 0.000 0.326 ESE 0.000 0.000 0.186 0.000 0.000 0.000 0.000 0.000 0.000 0.186 SE 0.000 0.047 0.140 0.000 0.000 0.000 0.000 0.000 0.000 0.186 SSE 0.000 0.000 0.233 0.000 0.047 0.047 0.000 0.000 0.000 0.326 S 0.000 0.000 0.373 0.326 0.326 0.512 0.000 0.000 0.000 1.537 SSW 0.000 0.093 0.978 2.375 1.584 1.071 0.000 0.000 0.000 6.102 SW 0.000 0.000 0.745 2.375 1.211 0.140 0.000 0.000 0.000 4.471 WSW 0.000 0.000 0.093 0.093 0.093 0.093 0.000 0.000 0.000 0.373 W 0.000 0.093 0.093 0.233 0.093 0.093 0.000 0.000 0.000 0.605 WNW 0.000 0.000 0.000 0.279 0.233 0.419 0.000 0.000 0.000 0.932 NW 0.000 0.000 0.047 0.373 0.745 1.397 0.000 0.000 0.000 2.562 NNW 0.000 0.093 0.233 0.140 0.652 1.816 0.047 0.000 0.000 2.981 SUBTOTAL 0.000 0.652 5.822 10.293 9.222 11.225 0.047 0.000 0.000 37.261 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2147 TOTAL HOURS OF STABILITY CLASS D 800 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 800 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2147 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/05/07 MEAN WIND SPEED = 5.96 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS AI-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, 2014 - MAR 31, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000 0.047 2.096 1.211 0.512 0.093 0.000 0.000 0.000 3.959 NNE 0.000 0.093 2.748 2.236 0.326 0.093 0.000 0.000 0.000 5.496 NE 0.000 0.140 0.932 0.140 0.047 0.000 0.000 0.000 0.000 1.258 ENE 0.000 0.093 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.140 E 0.000 0.047 0.186 0.000 0.000 0.000 0.000 0.000 0.000 0.233 ESE 0.000 0.140 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.233 SE 0.000 0.000 0.186 0.000 0.000 0.000 0.000 0.000 0.000 0.186 SSE 0.000 0.093 0.466 0.047 0.000 0.047 0.000 0.000 0.000 0.652 S 0.000 0.186 1.258 0.605 0.326 0.279 0.000 0.000 0.000 2.655 SSW 0.000 0.093 2.329 2.049 1.490 0.233 0.000 0.000 0.000 6.195 SW 0.000 0.093 1.723 0.792 0.279 0.140 0.000 0.000 0.000 3.027 WSW 0.000 0.233 0.186 0.140 0.047 0.000 0.000 0.000 0.000 0.605 W 0.000 0.093 0.419 0.186 0.093 0.093 0.000 0.000 0.000 0.885 WNW 0.000 0.093 0.233 0.140 0.047 0.000 0.000 0.000 0.000 0.512 NW 0.000 0.047 0.605 0.373 0.419 0.000 0.000 0.000 0.000 1.444 NNW 0.000 0.093 0.745 0.885 0.047 0.093 0.000 0.000 0.000 1.863 SUBTOTAL 0.000 1.584 14.252 8.803 3.633 1.071 0.000 0.000 0.000 29.343 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2147 TOTAL HOURS OF STABILITY CLASS E 630 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 630 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2147 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/05/07 MEAN WIND SPEED = 3.67 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, 2014 - MAR 31, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000 0.047 0.745 0.047 0.000 0.000 0.000 0.000 0.000 0.838 NNE 0.000 0.093 2.049 0.279 0.000 0.000 0.000 0.000 0.000 2.422 NE 0.000 0.093 1.025 0.093 0.000 0.000 0.000 0.000 0.000 1.211 ENE 0.000 0.093 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.186 E 0.000 0.186 0.186 0.000 0.000 0.000 0.000 0.000 0.000 0.373 ESE 0.000 0.047 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.140 SE 0.000 0.140 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.140 SSE 0.000 0.326 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.373 S 0.000 0.140 0.792 0.000 0.000 0.000 0.000 0.000 0.000 0.932 SSW 0.000 0.279 1.910 0.093 0.047 0.000 0.000 0.000 0.000 2.329 SW 0.000 0.186 1.211 0.466 0.093 0.000 0.000 0.000 0.000 1.956 WSW 0.000 0.000 0.373 0.047 0.000 0.000 0.000 0.000 0.000 0.419 W 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.093 WNW 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.093 NW 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.093 NNW 0.000 0.047 0.233 0.000 0.000 0.000 0.000 0.000 0.000 0.279 SUBTOTAL 0.000 1.723 8.943 1.071 0.140 0.000 0.000 0.000 0.000 11.877 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2147 TOTAL HOURS OF STABILITY CLASS F 255 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 255 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2147 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/05/07 MEAN WIND SPEED = 2.32 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, 2014 - MAR 31, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.093 NNE 0.000 0.047 0.792 0.000 0.000 0.000 0.000 0.000 0.000 0.838 NE 0.000 0.047 0.512 0.000 0.000 0.000 0.000 0.000 0.000 0.559 ENE 0.000 0.186 0.186 0.000 0.000 0.000 0.000 0.000 0.000 0.373 E 0.000 0.140 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.233 ESE 0.000 0.140 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.140 SE 0.000 0.186 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.279 SSE 0.000 0.093 0.233 0.000 0.000 0.000 0.000 0.000 0.000 0.326 S 0.000 0.279 0.279 0.000 0.000 0.000 0.000 0.000 0.000 0.559 SSW 0.000 0.047 0.885 0.140 0.000 0.000 0.000 0.000 0.000 1.071 SW 0.000 0.000 0.978 0.047 0.000 0.000 0.000 0.000 0.000 1.025 WSW 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 W 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 NNW 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 SUBTOTAL 0.000 1.258 4.145 0.279 0.000 0.000 0.000 0.000 0.000 5.682 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2147 TOTAL HOURS OF STABILITY CLASS G 122 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 122 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2147 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/05/07 MEAN WIND SPEED = 2.10 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERSJOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

SEQUOYAH NUCLEAR PLANT 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, 2014 - JUN 30, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24 .41 TOTAL N 0.000 0.000 0.000 0.000 0.092 0.276 0.000 0.000 0.000 0.368 NNE 0.000 0.000 0.046 0.368 0.368 0.276 0.000 0.000 0.000 1.058 NE 0.000 0.000 0.138 0.138 0.414 0.138 0.000 0.000 0.000 0.828 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SSE 0.000 0.000 0.000 0.000 0.184 0.000 0.000 0.000 0.000 0.184 S 0.000 0.000 0.000 0.092 0.414 0.322 0.000 0.000 0.000 0.828 SSW 0.000 0.000 0.046 0.276 0.920 0.414 0.000 0.000 0.000 1.656 SW 0.000 0.000 0.000 0.368 0.414 0.092 0.000 0.000 0.000 0.874 WSW 0.000 0.000 0.000 0.092 0.046 0.000 0.000 0.000 0.000 0.138 W 0.000 0.000 0.046 0.092 0.046 0.046 0.000 0.000 0.000 0.230 WNW 0.000 0.000 0.000 0.046 0.046 0.046 0.000 0.000 0.000 0.138 NW 0.000 0.000 0.000 0.046 0.138 0.000 0.000 0.000 0.000 0.184 NNW 0.000 0.000 0.000 0.000 0.138 0.138 0.000 0.000 0.000 0.276 SUBTOTAL 0.000 0.000 0.322 1.518 3.220 1.748 0.000 0.000 0.000 6.808 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS A 148 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 148 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/07/30 MEAN WIND SPEED = 6.46 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, 2014 - JUN 30, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.046 0.000 0.092 0.092 0.000 0.000 0.000 0.230 NNE 0.000 0.000 0.184 0.276 0.138 0.046 0.000 0.000 0.000 0.644 NE 0.000 0.000 0.230 0.184 0.046 0.000 0.000

0.000 0.000 0.460 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 S 0.000 0.000 0.046 0.138 0.322 0.046 0.000 0.000 0.000 0.552 SSW 0.000 0.000 0.092 1.196 1.104 0.322 0.000 0.000 0.000 2.714 SW 0.000 0.000 0.046 0.874 0.230 0.000 0.000 0.000 0.000 1.150 WSW 0.000 0.000 0.000 0.046 0.138 0.000 0.000 0.000 0.000 0.184 W 0.000 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.092 WNW 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.092 NW 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 NNW 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.092 SUBTOTAL 0.000 0.000 0.644 2.944 2.162 0.552 0.000 0.000 0.000 6.302 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS B 137 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 137 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/07/30 MEAN WIND SPEED = 5.33 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-10

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

SEQUOYAH NUCLEAR PLANT APR 1, 2014 - JUN 30, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.092 0.046 0.046 0.046 0.000 0.000 0.000 0.230 NNE 0.000 0.000 0.184 0.184 0.092 0.046 0.000 0.000 0.000 0.506 NE 0.000 0.000 0.276 0.092 0.046 0.000 0.000 0.000 0.000 0.414 ENE 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.092 E 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 ESE 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SE 0.000 0.000 0.092 0.138 0.000 0.000 0.000 0.000 0.000 0.230 SSE 0.000 0.000 0.092 0.046 0.000 0.092 0.000 0.000 0.000 0.230 S 0.000 0.000 0.092 0.322 0.184 0.230 0.000 0.000 0.000 0.828 SSW 0.000 0.000 0.184 1.702 0.736 0.184 0.000 0.000 0.000 2.806 SW 0.000 0.000 0.276 0.966 0.414 0.138 0.000 0.000 0.000 1.794 WSW 0.000 0.000 0.000 0.184 0.046 0.046 0.000 0.000 0.000 0.276 W 0.000 0.000 0.046 0.092 0.046 0.092 0.000 0.000 0.000 0.276 WNW 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 NW 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 NNW 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.092 SUBTOTAL 0.000 0.000 1.472 3.818 1.702 0.966 0.000 0.000 0.000 7.958 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS C 173 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 173 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/07/30 MEAN WIND SPEED = 5.07 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, 2014 - JUN 30, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.046 0.966 0.460 0.230 0.092 0.000 0.000 0.000 1.794 NNE 0.000 0.046 0.460 1.150 0.782 0.276 0.000 0.000 0.000 2.714 NE 0.000 0.000 0.920 0.276 0.184 0.092 0.000 0.000 0.000 1.472 ENE 0.000 0.046 0.414 0.000 0.000 0.000 0.000 0.000 0.000 0.460 E 0.000 0.000 0.184 0.092 0.000 0.000 0.000 0.000 0.000 0.276 ESE 0.000 0.000 0.184 0.000 0.000 0.000 0.000 0.000 0.000 0.184 SE 0.000 0.092 0.276 0.046 0.000 0.000 0.000 0.000 0.000 0.414 SSE 0.000 0.046 0.966 0.322 0.184 0.046 0.000 0.000 0.000 1.564 S 0.000 0.046 2.392 2.806 1.334 0.506 0.046 0.000 0.000 7.130 SSW 0.000 0.046 3.634 3.588 1.334 0.598 0.000 0.000 0.000 9.200 SW 0.000 0.000 1.380 1.196 0.874 0.184 0.000 0.000 0.000 3.634 WSW 0.000 0.046 0.322 0.506 0.276 0.092 0.000 0.000 0.000 1.242 W 0.000 0.138 0.138 0.322 0.138 0.046 0.000 0.000 0.000 0.782 WNW 0.000 0.000 0.184 0.368 0.092 0.000 0.000 0.000 0.000 0.644 NW 0.000 0.000 0.046 0.368 0.138 0.000 0.000 0.000 0.000 0.552 NNW 0.000 0.046 0.138 0.322 0.322 0.000 0.000 0.000 0.000 0.828 SUBTOTAL 0.000 0.598 12.603 11.822 5.888 1.932 0.046 0.000 0.000 32.889 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS D 715 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 715 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/07/30 MEAN WIND SPEED = 4.24 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, 2014 - JUN 30, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24 .41 TOTAL N 0.000 0.414 2.162 0.598 0.184 0.000 0.000 0.000 0.000 3.358 NNE 0.000 0.230 2.944 0.920 0.000 0.000 0.000 0.000 0.000 4.094 NE 0.000 0.138 0.506 0.092 0.000 0.000 0.000 0.000 0.000 0.736 ENE 0.000 0.230 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.276 E 0.000 0.138 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.184 ESE 0.000 0.092 0.138 0.046 0.000 0.000 0.000 0.000 0.000 0.276 SE 0.000 0.138 0.368 0.046 0.000 0.000 0.000 0.000 0.000 0.552 SSE 0.000 0.230 0.874 0.092 0.092 0.092 0.000 0.000 0.000 1.380 S 0.000 0.276 2.024 0.690 0.506 0.184 0.000 0.000 0.000 3.680 SSW 0.000 0.276 3.496 1.104 0.276 0.046 0.000 0.000 0.000 5.198 SW 0.000 0.690 3.082 0.920 0.138 0.000 0.000 0.000 0.000 4.830 WSW 0.000 0.368 1.334 0.368 0.000 0.000 0.000 0.000 0.000 2.070 W 0.000 0.322 0.782 0.322 0.000 0.000 0.000 0.000 0.000 1.426 WNW 0.000 0.092 0.322 0.000 0.092 0.000 0.000 0.000 0.000 0.506 NW 0.000 0.276 0.506 0.368 0.046 0.000 0.000 0.000 0.000 1.196 NNW 0.000 0.230 1.196 0.368 0.000 0.000 0.000 0.000 0.000 1.794 SUBTOTAL 0.000 4.140 19.779 5.980 1.334 0.322 0.000 0.000 0.000 31.555 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS E 686 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 686 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/07/30 MEAN WIND SPEED = 2.75 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, 2014 - JUN 30, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.230 0.966 0.000 0.000 0.000 0.000 0.000 0.000 1.196 NNE 0.000 0.138 2.622 0.092 0.000 0.000 0.000 0.000 0.000 2.852 NE 0.000 0.276 0.598 0.000 0.000 0.000 0.000 0.000 0.000 0.874 ENE 0.000 0.092 0.138 0.000 0.000 0.000 0.000 0.000 0.000 0.230 E 0.000 0.322 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.368 ESE 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SE 0.000 0.230 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.276 SSE 0.000 0.138 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.230 S 0.000 0.184 0.368 0.000 0.000 0.000 0.000 0.000 0.000 0.552 SSW 0.000 0.230 1.012 0.138 0.000 0.000 0.000 0.000 0.000 1.380 SW 0.000 0.230 1.058 0.092 0.000 0.000 0.000 0.000 0.000 1.380 WSW 0.000 0.046 0.368 0.000 0.000 0.000 0.000 0.000 0.000 0.414 W 0.000 0.000 0.184 0.046 0.000 0.000 0.000 0.000 0.000 0.230 WNW 0.000 0.046 0.230 0.000 0.000 0.000 0.000 0.000 0.000 0.276 NW 0.000 0.046 0.092 0.092 0.000 0.000 0.000 0.000 0.000 0.230 NNW 0.000 0.046 0.276 0.092 0.000 0.000 0.000 0.000 0.000 0.414 SUBTOTAL 0.000 2.300 8.096 0.552 0.000 0.000 0.000 0.000 0.000 10.948 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS F 238 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 238 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/07/30 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, 2014 - JUN 30, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.368 0.000 0.000 0.000 0.000 0.000 0.000 0.368 NE 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 ENE 0.000 0.138 0.138 0.000 0.000 0.000 0.000 0.000 0.000 0.276 E 0.000 0.184 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.184 ESE 0.000 0.184 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.184 SE 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.092 SSE 0.000 0.230 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.322 S 0.000 0.046 0.414 0.000 0.000 0.000 0.000 0.000 0.000 0.460 SSW 0.000 0.138 0.874 0.000 0.000 0.000 0.000 0.000 0.000 1.012 SW 0.000 0.000 0.506 0.000 0.000 0.000 0.000 0.000 0.000 0.506 WSW 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 W 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 1.012 2.438 0.092 0.000 0.000 0.000 0.000 0.000 3.542 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2174 TOTAL HOURS OF STABILITY CLASS G 77 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 77 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2174 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/07/30 MEAN WIND SPEED = 1.99 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, 2014 - SEP 30, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.276 0.046 0.138 0.000 0.000 0.000 0.000 0.460 NNE 0.000 0.000 0.460 1.841 0.966 0.414 0.000 0.000 0.000 3.682 NE 0.000 0.000 0.506 0.414 0.230 0.000 0.000 0.000 0.000 1.150 ENE 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.138 0.046 0.000 0.000 0.000 0.184 SW 0.000 0.000 0.000 0.092 0.046 0.046 0.000 0.000 0.000 0.184 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 NNW 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.092 SUBTOTAL 0.000 0.000 1.427 2.485 1.519 0.506 0.000 0.000 0.000 5.936 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2173 TOTAL HOURS OF STABILITY CLASS A 129 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 129 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/10/28 MEAN WIND SPEED = 4.78 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, 2014 - SEP 30, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.046 0.046 0.092 0.000 0.000 0.000 0.000 0.184 NNE 0.000 0.000 0.184 0.506 0.506 0.092 0.000 0.000 0.000 1.289 NE 0.000 0.000 0.322 0.092 0.000 0.000 0.000 0.000 0.000 0.414 ENE 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 E 0.000 0.000 0.138 0.000 0.000 0.000 0.000 0.000 0.000 0.138 ESE 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.092 SE 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SSW 0.000 0.000 0.046 0.644 0.184 0.000 0.000 0.000 0.000 0.874 SW 0.000 0.000 0.092 0.552 0.092 0.000 0.000 0.000 0.000 0.736 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 SUBTOTAL 0.000 0.000 1.012 1.933 0.874 0.092 0.000 0.000 0.000 3.912 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2173 TOTAL HOURS OF STABILITY CLASS B 85 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 85 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/10/28 MEAN WIND SPEED = 4.49 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, 2014 - SEP 30, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.230 0.276 0.138 0.000 0.000 0.000 0.000 0.644 NNE 0.000 0.000 0.184 0.552 0.322 0.000 0.000 0.000 0.000 1.058 NE 0.000 0.000 0.506 0.276 0.046 0.000 0.000 0.000 0.000 0.828 ENE 0.000 0.000 0.230 0.000 0.000 0.000 0.000 0.000 0.000 0.230 E 0.000 0.000 0.322 0.046 0.000 0.000 0.000 0.000 0.000 0.368 ESE 0.000 0.000 0.184 0.046 0.000 0.000 0.000 0.000 0.000 0.230 SE 0.000 0.000 0.046 0.046 0.046 0.000 0.000 0.000 0.000 0.138 SSE 0.000 0.000 0.092 0.092 0.000 0.000 0.000 0.000 0.000 0.184 S 0.000 0.000 0.000 0.184 0.000 0.000 0.000 0.000 0.000 0.184 SSW 0.000 0.000 0.092 1.104 0.552 0.000 0.000 0.000 0.000 1.749 SW 0.000 0.000 0.414 0.552 0.184 0.000 0.000 0.000 0.000 1.150 WSW 0.000 0.000 0.184 0.092 0.000 0.000 0.000 0.000 0.000 0.276 W 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.092 WNW 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.092 NW 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 NNW 0.000 0.000 0.046 0.092 0.092 0.000 0.000 0.000 0.000 0.230 SUBTOTAL 0.000 0.000 2.623 3.497 1.381 0.000 0.000 0.000 0.000 7.501 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2173 TOTAL HOURS OF STABILITY CLASS C 163 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 163 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/10/28 MEAN WIND SPEED = 4.13 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, 2014 - SEP 30, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.046 1.058 0.966 0.736 0.000 0.000 0.000 0.000 2.807 NNE 0.000 0.000 1.243 2.531 1.150 0.276 0.000 0.000 0.000 5.200 NE 0.000 0.000 0.828 0.230 0.000 0.000 0.000 0.000 0.000 1.058 ENE 0.000 0.000 0.138 0.046 0.000 0.000 0.000 0.000 0.000 0.184 E 0.000 0.000 0.276 0.138 0.000 0.000 0.000 0.000 0.000 0.414 ESE 0.000 0.046 0.414 0.000 0.000 0.000 0.000 0.000 0.000 0.460 SE 0.000 0.046 0.644 0.184 0.000 0.000 0.000 0.000 0.000 0.874 SSE 0.000 0.000 0.920 0.368 0.092 0.000 0.000 0.000 0.000 1.381 S 0.000 0.046 3.037 2.255 0.322 0.000 0.000 0.000 0.000 5.660 SSW 0.000 0.046 3.728 4.924 0.644 0.000 0.000 0.000 0.000 9.342 SW 0.000 0.138 1.381 1.197 0.874 0.276 0.000 0.000 0.000 3.866 WSW 0.000 0.138 0.598 0.184 0.046 0.000 0.000 0.000 0.000 0.966 W 0.000 0.000 0.414 0.230 0.000 0.000 0.000 0.000 0.000 0.644 WNW 0.000 0.000 0.276 0.276 0.000 0.000 0.000 0.000 0.000 0.552 NW 0.000 0.092 0.184 0.092 0.000 0.046 0.000 0.000 0.000 0.414 NNW 0.000 0.000 0.506 0.368 0.506 0.000 0.000 0.000 0.000 1.381 SUBTOTAL 0.000 0.598 15.647 13.990 4.372 0.598 0.000 0.000 0.000 35.205 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2173 TOTAL HOURS OF STABILITY CLASS D 765 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 765 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/10/28 MEAN WIND SPEED = 3.76 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, 2014 - SEP 30, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.552 4.786 1.381 0.000 0.000 0.000 0.000 0.000 6.719 NNE 0.000 0.736 2.715 1.749 0.138 0.000 0.000 0.000 0.000 5.338 NE 0.000 0.506 0.460 0.046 0.000 0.000 0.000 0.000 0.000 1.012 ENE 0.000 0.138 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.184 E 0.000 0.230 0.092 0.046 0.000 0.000 0.000 0.000 0.000 0.368 ESE 0.000 0.322 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.368 SE 0.000 0.368 0.598 0.000 0.000 0.000 0.000 0.000 0.000 0.966 SSE 0.000 0.276 0.552 0.000 0.000 0.000 0.000 0.000 0.000 0.828 S 0.000 0.690 1.749 0.230 0.046 0.000 0.000 0.000 0.000 2.715 SSW 0.000 0.644 2.669 0.322 0.000 0.000 0.000 0.000 0.000 3.636 SW 0.000 0.276 3.636 0.736 0.184 0.138 0.000 0.000 0.000 4.970 WSW 0.000 0.552 1.887 0.184 0.092 0.000 0.000 0.000 0.000 2.715 W 0.000 0.690 1.335 0.092 0.000 0.000 0.000 0.000 0.000 2.117 WNW 0.000 0.092 1.104 0.000 0.000 0.000 0.000 0.000 0.000 1.197 NW 0.000 0.184 0.552 0.046 0.000 0.000 0.000 0.000 0.000 0.782 NNW 0.000 0.092 1.841 0.414 0.046 0.000 0.000 0.000 0.000 2.393 SUBTOTAL 0.000 6.351 24.068 5.246 0.506 0.138 0.000 0.000 0.000 36.309 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2173 TOTAL HOURS OF STABILITY CLASS E 789 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 789 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/10/28 MEAN WIND SPEED = 2.40 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, 2014 - SEP 30, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24. 41 TOTAL N 0.000 0.230 2.623 0.644 0.000 0.000 0.000 0.000 0.000 3.497 NNE 0.000 0.690 2.577 0.230 0.000 0.000 0.000 0.000 0.000 3.497 NE 0.000 0.322 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.414 ENE 0.000 0.184 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.230 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.138 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.138 SE 0.000 0.046 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.138 SSE 0.000 0.276 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.368 S 0.000 0.092 0.368 0.000 0.000 0.000 0.000 0.000 0.000 0.460 SSW 0.000 0.092 0.322 0.000 0.000 0.000 0.000 0.000 0.000 0.414 SW 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.092 WSW 0.000 0.000 0.276 0.000 0.000 0.000 0.000 0.000 0.000 0.276 W 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.092 WNW 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.092 NW 0.000 0.000 0.230 0.000 0.000 0.000 0.000 0.000 0.000 0.230 NNW 0.000 0.046 0.644 0.138 0.046 0.000 0.000 0.000 0.000 0.874 SUBTOTAL 0.000 2.255 7.501 1.012 0.046 0.000 0.000 0.000 0.000 10.815 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2173 TOTAL HOURS OF STABILITY CLASS F 235 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 235 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/10/28 MEAN WIND SPEED = 2.12 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, 2014 - SEP 30, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41ýi8.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.092 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 .0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.092 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.092 SUBTOTAL 0.000 0.138 0.092 0.092 0.000 0.000 0.000 0.000 0.000 0.322 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2173 TOTAL HOURS OF STABILITY CLASS G 7 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 7 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2173 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/10/28 MEAN WIND SPEED = 2.30 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, 2014 - DEC 31, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24 .41 TOTAL N 0.000 0.000 0.045 0.091 0.363 0.091 0.000 0.000 0.000 0.590 NNE 0.000 0.000 0.045 0.545 1.135 0.590 0.000 0.000 0.000 2.316 NE 0.000 0.000 0.136 0.545 0.091 0.136 0.000 0.000 0.000 0.908 ENE 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 E 0.000 0.000 0.091 0.045 0.000 0.000 0.000 0.000 0.000 0.136 ESE 0.000 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.091 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.045 S 0.000 0.000 0.045 0.045 0.000 0.045 0.000 0.000 0.000 0.136 SSW 0.000 0.000 0.045 0.136 0.363 0.000 0.000 0.000 0.000 0.545 SW 0.000 0.000 0.000 0.590 0.272 0.091 0.000 0.000 0.000 0.954 WSW 0.000 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.091 W 0.000 0.000 0.000 0.000 0.182 0.000 0.000 0.000 0.000 0.182 WNW 0.000 0.000 0.000 0.000 0.091 0.045 0.000 0.000 0.000 0.136 NW 0.000 0.000 0.000 0.091 0.227 0.000 0.000 0.000 0.000 0.318 NNW 0.000 0.000 0.000 0.136 0.136 0.045 0.000 0.000 0.000 0.318 SUBTOTAL 0.000 0.000 0.500 2.271 2.952 1.090 0.000 0.000 0.000 6.812 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2202 TOTAL HOURS OF STABILITY CLASS A 150 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 150 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2202 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2015/01/09 MEAN WIND SPEED = 5.95 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, 2014 - DEC 31, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.045 0.091 0.136 0.045 0.000 0.000 0.000 0.318 NNE 0.000 0.000 0.045 0.227 0.363 0.182 0.000 0.000 0.000 0.817 NE 0.000 0.000 0.091 0.227 0.000 0.000 0.000 0.000 0.000 0.318 ENE 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.091 E 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.091 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 S 0.000 0.000 0.000 0.136 0.000 0.000 0.000 0.000 0.000 0.136 SSW 0.000 0.000 0.091 0.454 0.409 0.045 0.000 0.000 0.000 0.999 SW 0.000 0.000 0.045 0.454 0.318 0.136 0.000 0.000 0.000 0.954 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.045 WNW 0.000 0.000 0.000 0.000 0.045 0.045 0.000 0.000 0.000 0.091 NW 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.045 NNW 0.000 0.000 0.000 0.045 0.136 0.045 0.000 0.000 0.000 0.227 SUBTOTAL 0.000 0.045 0.500 1.680 1.453 0.500 0.000 0.000 0.000 4.178 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2202 TOTAL HOURS OF STABILITY CLASS B 92 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 92 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2202 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2015/01/09 MEAN WIND SPEED = 5.34 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/D00 M)

SEQUOYAH NUCLEAR PLANT OCT 1, 2014 - DEC 31, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 0.000 0.091 0.272 0.136 0.000 0.000 0.000 0.500 NNE 0.000 0.000 0.091 0.227 0.272 0.136 0.000 0.000 0.000 0.727 NE 0.000 0.000 0.182 0.091 0.091 0.000 0.000 0.000 0.000 0.363 ENE 0.000 0.000 0.182 0.000 0.000 0.000 0.000 0.000 0.000 0.182 E 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.DOD 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 SSE 0.000 0.000 0.000 0.000 0.045 0.091 0.000 0.000 0.000 0.136 S 0.000 0.000 0.091 0.136 0.045 0.045 0.000 0.000 0.000 0.318 SSW 0.000 0.000 0.182 0.590 0.182 0.000 0.000 0.000 0.000 0.954 SW 0.000 0.000 0.227 0.363 0.227 0.045 0.000 0.000 0.000 0.863 WSW 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.091 W 0.000 0.000 0.000 0.045 0.045 0.091 0.000 0.000 0.000 0.182 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.091 NNW 0.000 0.000 0.091 0.000 0.272 0.182 0.000 0.000 0.000 0.545 SUBTOTAL 0.000 0.000 1.135 1.635 1.544 0.727 0.000 0.000 0.000 5.041 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2202 TOTAL HOURS OF STABILITY CLASS C 1il TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 1il TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2202 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2015/01/09 MEAN WIND SPEED = 5.37 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-25

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

SEQUOYAH NUCLEAR PLANT OCT 1, 2014 - DEC 31, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.000 1.135 1.135 2.225 1.635 0.000 0.000 0.000 6.131 NNE 0.000 0.045 1.362 2.407 1.953 1.680 0.000 0.000 0.000 7.448 NE 0.000 0.045 0.545 0.136 0.045 0.045 0.000 0.000 0.000 0.817 ENE 0.000 0.000 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.136 E 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.091 ESE 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.091 SE 0.000 0.091 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.227 SSE 0.000 0.045 0.045 0.000 0.000 0.045 0.000 0.000 0.000 0.136 S 0.000 0.091 0.363 0.636 0.500 0.227 0.000 0.000 0.000 1.817 SSW 0.000 0.045 1.135 2.770 0.863 0.182 0.000 0.000 0.000 4.995 SW 0.000 0.182 1.726 1.998 0.908 0.409 0.000 0.000 0.000 5.223 WSW 0.000 0.136 0.863 0.681 0.227 0.000 0.000 0.000 0.000 1.907 W 0.000 0.045 0.500 0.545 0.272 0.091 0.000 0.000 0.000 1.453 WNW 0.000 0.045 0.136 0.272 0.363 0.091 0.000 0.000 0.000 0.908 NW 0.000 0.000 0.363 0.227 0.545 0.182 0.000 0.000 0.000 1.317 NNW 0.000 0.000 0.500 0.636 1.317 0.863 0.000 0.000 0.000 3.315 SUBTOTAL 0.000 0.817 9.083 11.444 9.219 5.450 0.000 0.000 0.000 36.013 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2202 TOTAL HOURS OF STABILITY CLASS D 793 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 793 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2202 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2015/01/09 MEAN WIND SPEED = 5.09 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, 2014 - DEC 31, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24.41 TOTAL N 0.000 0.363 3.996 2.089 0.409 0.045 0.000 0.000 0.000 6.903 NNE 0.000 0.227 3.451 2.089 0.863 0.000 0.000 0.000 0.000 6.630 NE 0.000 0.091 0.272 0.045 0.000 0.000 0.000 0.000 0.000 0.409 ENE 0.000 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.136 E 0.000 0.091 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.227 ESE 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 SE 0.000 0.091 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.136 SSE 0.000 0.091 0.454 0.136 0.000 0.000 0.000 0.000 0.000 0.681 S 0.000 0.227 0.545 0.636 0.091 0.182 0.000 0.000 0.000 1.680 SSW 0.000 0.363 2.316 1.317 0.590 0.272 0.000 0.000 0.000 4.859 SW 0.000 0.182 2.906 1.045 0.227 0.045 0.000 0.000 0.000 4.405 WSW 0.000 0.182 2.134 0.363 0.045 0.000 0.000 0.000 0.000 2.725 W 0.000 0.182 0.590 0.272 0.091 0.045 0.000 0.000 0.000 1.181 WNW 0.000 0.091 0.227 0.045 0.182 0.000 0.000 0.000 0.000 0.545 NW 0.000 0.227 0.727 0.409 0.045 0.000 0.000 0.000 0.000 1.408 NNW 0.000 0.182 1.272 0.454 0.182 0.000 0.000 0.000 0.000 2.089 SUBTOTAL 0.000 2.725 19.119 8.901 2.725 0.590 0.000 0.000 0.000 34.060 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2202 TOTAL HOURS OF STABILITY CLASS E 750 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 750 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2202 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2015/01/09 MEAN WIND SPEED = 3.22 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, 2014 - DEC 31, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24 .41 TOTAL N 0.049 0.136 2.861 0.136 0.000 0.000 0.000 0.000 0.000 3.182 NNE 0.055 0.409 2.952 0.227 0.000 0.000 0.000 0.000 0.000 3.643 NE 0.006 0.272 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.369 ENE 0.004 0.227 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.231 E 0.001 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.001 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.092 SSE 0.001 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 S 0.015 0.545 0.363 0.000 0.000 0.000 0.000 0.000 0.000 0.923 SSW 0.012 0.227 0.500 0.000 0.000 0.000 0.000 0.000 0.000 0.738 SW 0.016 0.136 0.863 0.045 0.000 0.000 0.000 0.000 0.000 1.061 WSW 0.007 0.045 0.409 0.000 0.000 0.000 0.000 0.000 0.000 0.462 W 0.005 0.091 0.227 0.045 0.000 0.000 0.000 0.000 0.000 0.368 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.003 0.000 0.182 0.045 0.000 0.000 0.000 0.000 0.000 0.230 NNW 0.007 0.182 0.227 0.272 0.000 0.000 0.000 0.000 0.000 0.688 SUBTOTAL 0.182 2.452 8.674 0.772 0.000 0.000 0.000 0.000 0.000 12.080 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2202 TOTAL HOURS OF STABILITY CLASS F 266 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 266 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2202 TOTAL HOURS CALM 4 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: 2015/01/09 MEAN WIND SPEED = 2.14 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED'NUMBERS Al-28

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

SEQUOYAH NUCLEAR PLANT OCT 1, 2014 - DEC 31, 2014 WIND WIND SPEED(MPH)

DIRECTION CALM 0.60-1.40 1.41-3.40 3.41-5.40 5.41-7.40 7.41-12.40 12.41-18.40 18.41-24.40 >=24 .41 TOTAL N 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.091 NNE 0.000 0.000 0.409 0.000 0.000 0.000 0.000 0.000 0.000 0.409 NE 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.045 ENE 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.091 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.091 SE 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.045 SSE 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.091 S 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 SSW 0.000 0.045 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.136 SW 0.000 0.136 0.500 0.000 0.000 0.000 0.000 0.000 0.000 0.636 WSW 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.045 NNW 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.045 SUBTOTAL 0.000 0.545 1.181 0.091 0.000 0.000 0.000 0.000 0.000 1.817 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2202 TOTAL HOURS OF STABILITY CLASS G 40 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 40 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2202 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2015/01/09 MEAN WIND SPEED = 2.06 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-29

Attachment 2.0 Deviations from ODCM Controls/Surveillance Requirements Date ODCM Description of Deviation Requirement April 30, 2014 1/2.1.2 During performance of O-SO-30-3 for placing 'B' Train Purge Table 1.1-2 to lower containment found 2-RM-90-130/131 aligned to 'A' Train Purge. This was noted as the night before 'B' Train Purge was shut down due to the Tornado Warning. After research it was determined that 'A' Train Purge had not been in-service since 4/8/14. The procedure in the open procedures book contained an open procedure dated 3/31/14 that had swapped 2-RM-90-130/131 to 'A' Train. Since 4/8/14 'B' Train Purge has been stopped and restarted 3 times.

2-SO-90-2 section 8.5 was immediately performed prior to placing 'B' Train Purge in-service to swap 2-RM-90-130/131 from 'A' to 'B' to both get them aligned properly and to verify that indeed the rad monitors were aligned to 'A' Train.

PER 878321 May 7,2014 1/2.2 l-R-90-400 is inoperable and there is a compensatory sampler Table 1.1-2 monitoring the Ul Shield Bid. Stack iaw the Offsite Dose item 3.band Calculation Manual . On May 7 at 0241 Operations transferred Turbine Bid. Lighting Boards 1 and 2 from alternate to normal supply iaw 0-SO-201-13. UI was purging containment.

Chemistry went out to U I Sping Room to perform 4 hour4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months compensatory flow check on the temporary sampler.

Chemistry discovered the temporary was not running.

Chemistry informed the Shift Mgr and Purge was secured. The release was monitored with the Purge Monitors. This event will be included in the 2014 Radiological Effluent Report as an ODCM deviation Table 1.1-2 Action 45.

A2-1

Attachment 3.0 Radiation Monitors Inoperable for Greater than 30 days Date Description of Inoperability June 11, 2012 Unit 1 Shield Building Exhaust System Radiation Monitor, I-RM-90-400 was declared inoperable on June 11, 2012 due to inoperable Kurz system. It was removed from service to replace sampling pumps. The Kurz system allows Monitor operation in the mid and high ranges. The Monitor still maintains low range detection functions. The ADAM microprocessor failed. It has not been returned to operability.

March 31, 2014 ERCW Radiation Monitor 0-RM-90-134/141 was declared in-operable due to a failed pump. The pump was replaced and the monitor was returned to service May 12, 2014.

A4-1

ADDENDUM 1 Sequoyah sewage sample collected October 17, 2013 had detectable tritium in the sample. The sample had 3.19 E-06 uCi/ml. The follow up sample collected November 1, 2013 showed a tritium concentration of 2.88E-06 uCi/ml. There were no other indications of a positive tritium value detected. The samples were analyzed for HTD's. The HTD's analyses were less than the LLD's.

Third Quarter Individual Doses ___rem__

Quarterly Percent of Age Group Organ Dose Limit Limit Child Total Body 5.80E-06 1.5 mrem <1 %

Child Liver 5.80E-06 5 mrem <I %

Child Thyroid 5.80E-06 5 mrem <1 %

Population Doses Total Body Dose 5.20E-04man-rem Maximum Organ Dose (organ) 5.20E-04 man-rem (GIT)

A4-1

ML15125A009

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