Text

2013 Annual Radioactive Effluent Release Report
	ML14118A380
Person / Time
Site:	Sequoyah
Issue date:	04/16/2014
From:	John Carlin; Tennessee Valley Authority
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	Download: ML14118A380 (75)
	v • d • e

Tennessee Valley Authority, Post Office Box 2000, Soddy Daisy, Tennessee 37384-2000 April 16, 2014 10 CFR 50.4 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D. C. 20555-0001 Sequoyah Nuclear Plant, Units 1 and 2 Facility Operating License Nos. DPR-77 and DPR-79 NRC Docket Nos. 50-327 and 50-328

Subject:

2013 Annual Radioactive Effluent Release Report Enclosed is the Annual Radioactive Effluent Release Report (ARERR) for the period of January 1 to December 31, 2013. 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.

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 regulatory commitments contained in this letter. If you have any questions concerning this matter, please contact Michael McBrearty at (423) 843-7170.

Nuclear Plant

Enclosures:

1. Annual Radioactive Effluent Release Report, Sequoyah Nuclear Plant, January - December 2013

2. Radiological Impact Assessment Report, Sequoyah Nuclear Plant, January -

December 2013 cc (Enclosures):

NRC Regional Administrator - Region II NRC Senior Resident Inspector - ,--p- q 9-,

NRR Project Manager - Sequoyah Nuclear Plant Cý-J-

Enclosure 1 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT SEQUOYAH NUCLEAR PLANT 2013 EI-I

2013 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 (1-131). lodine-133 (1-133), tritium, and all radionuclides in particulate form with half-lives greater than eight days:

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

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

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

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

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

a. Less than or equal to 7.5 mrem to any organ during any calendar quarter.

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

B. Liquid Effluents I1. The annual average concentration of radioactivity released in liquid effluents to unrestricted areas shall be limited to the concentrations specified in Title 10 of the Code of Federal Regulations (CFR), Part 20 (Standards for Protection Against Radiation), Appendix B, Table 2, Column 2, for radionuclides other than dissolved or entrained noble gases. For dissolved or entrained noble gases, the concentration shall be limited to 2.OE-04 microcuries/milliliter (PlCi/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

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

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

B. Gaseous

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

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

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

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

b. Iodine- 131, Iodine-1 33, 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.

Ill. 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 tile sampling periods.

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C. Carbon-14 in Gaseous Releases The Carbon-14 production and effluent source term estimates were based on Electric Power Institute methodology provided in EPRI Report 1021106, "Estimation of Carbon-14 in Nuclear Power Plant Gaseous Effluents," dated 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 2013 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 1/1/2013 <233 10/30/2013 <222 Well-25 1/1/2013 <233 10/30/2013 <222 Well-26 1/1/2013 <233 10/30/2013 <222 Well-27 1/1/2013 <233 10/30/2013 <222 Well-28 1/1/2013 <233 10/30/2013 <222 Well-29 3/6/2013 418 4/16/2013 414 Well-29 7/10/2013 263 10/30/2013 501 Well-30 1/1/2013 <233 4/16/2013 <231 Well-30 7/10/2013 <219 N/A N/A Well-31 3/6/2013 537 4/16/2013 1536 Well-31 7/10/2013 1526 10/30/2013 1352 Well-32 1/1/2013 <233 10/30/2013 <222 Well-34 1/1/2013 <233 10/30/2013 477 Well-35 1/1/2013 <233 10/30/13 <222 GP-7A 1/1/2013 304 3/6/2013 <219 GP-7A 4/16/2013 430 7/10/2013 464 GP-10 3/6/2013 <219 7/10/2013 <219 GP-10 10/30/2013 <222 N/A N/A GP-13 1/1/2013 5577 4/16/2013 5303 GP-13 7/10/2013 3830 10/30/2013 4526 W-9 1/1/2013 <233 4/16/2013 <231 W-9 7/10/2013 <219 10/30/2013 <222 WE-10 1/1//2013 22606 3/6/2013 27959 WE-10 4/16/2013 29630 5/25/2013 26780 WE-10 6/9/2013 26120 7/10/2013 25291 WE-10 8/17/2013 23280 10/30/2013 19888 E1-6

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 1 mrem limit and that the performance of the 1-131 specific analysis is not required for SQN REMP drinking water samples.

Quarter 1 2 3 4 Totals 1-131 Ci 0.OOE+01 0.OOE+01 1.68E-05 1.24E-06 1.80E-05 Infant/Thyroid (mrem) O.OOE+01 O.OOE+01 2.70E-06 2.1OE-07 2.91E-06 Population/Thyroid (mrem) 0.OOE+01 O.OOE+01 8.30E-05 6.60E-06 8.96E-05 El-7

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

a. Number of releases 59 86 Each

b. Total time period of releases 9391.98 13972.00 Minutes

c. Maximum time period of release 823 359.00 Minutes

d. Average time period of releases 159.19 162.47 Minutes

e. Minimum time period of release 4.98 10.00 Minutes

f. Average dilution stream flow during release periods 60,715.0 45,022.0 CFS

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

a. Number of releases 69 73 Each

b. Total time period of releases 41186.00 215883.98 Minutes C. Maximum time period of release 1111.00 39165.00 Minutes

d. Average time period of releases 596.90 2957.31 Minutes

e. Minimum time period of release 8.00 24.00 Minutes VI. ABNORMAL RELEASES Value

1. Liquid 1st Half 2nd Half Units 0 0

a. Number of releases

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

2. Gaseous I st Half 2nd Half Units

a. Number of releases 2 2

b. Total activity released 3.33E-03 9.29E-04 Ci El-8

Release Type: Gaseous (Steam)

Release Point: Unit 2 Power Operated Relief Valves (PORVs)

Date(s) of Release: 1st Quarter, 02/24/2013 1200 through 02/24/2013 1718 This evaluation is for the release to the environment that occurred from the Unit 2 PORV's following a manual reactor trip on February 24, 2013. Following the reactor trip, the Steam Generator PORVs were open for periods of time during the shut down.

The following is data used to determine the curies and dose impacts as a result of the release:

" While all the PORVs were not open continuously during this period, the evaluation assumed the release was continuous from all four PORVs.

" There have been no gamma emitting radionuclides identified in any Secondary Coolant samples prior to the Shut Down.

The volume of each steam generator was taken from Westinghouse Guidelines for Secondary Water Chemistry. The listed normal water level value of 3379 ft 3 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 ml/ft3

4 generators = 3.828E+08 ml 6.966E-06 VCi/ml

3.828E+08 ml = 2.667E+03 [tCi of H3 or 2.667E-03 Ci of H3 The activity of 2.667E-03 curies was added to the 1st Quarter Table "Curies Released in Gaseous Ground Level Releases," and the 1st 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/950/meters Beta Air 0.OOE+00 mrad 10 mrad <1 N/950/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 7.01E-07 mrem 7.5 mrem <1 NNE/3271/meters Child/Total Body 7.01E-07 mrem 7.5 mrem <1 NNE/3271/meters Population Doses Total Body Dose 9.60E-06 man-rem Maximum Organ Dose (organ) 9.60E-06 man-rem (Thyroid)

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Release Type: Gaseous (Steam)

Release Point: Unit 2 PORV 1 Date(s) of Release: 1st Quarter, 02/24/2013 1715 through 02/25/2013 0917 This evaluation is for the release to the environment that occurred from the Unit 2 PORV's following a manual reactor trip on February 24, 2013. Following the reactor trip, the Steam Generator PORV I was open for a period of time by itself during the Shut Down. 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 1 only.

" There have been no gamma emitting radionuclides identified in any Secondary Coolant samples prior to the Shut Down.

The volume of each steam generator was taken from Westinghouse Guidelines for Secondary Water Chemistry. The listed normal water level value of 3379 ft 3 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 ml/ft3

1 generator = 9.569E+07 ml 6.966E-06 jiCi/ml

9.569E+07 ml = 6.666E+02 liCi of H3 or 6.666E-04 Ci of H3 The activity of 6.666E-04 curies was added to the 1st Quarter Table "Curies Released in Gaseous Ground Level Releases," and the 1st 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/950/meters Beta Air 0.OOE+00 mrad 10 mrad <1 N/950/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 1.75E-07 mrem 7.5 mrem <1 NNE/3271/meters Child/Total Body 1.75E-07 mrem 7.5 mrem <1 NNE/3271/meters Population Doses Total Body Dose 2.40E-06 man-rem Maximum Organ Dose (organ) 2.40E-06 man-rem (Thyroid)

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Release Type: Gaseous (Steam)

Release Point: Unit 1 PORV's I & 3 Date(s) of Release: 4th Quarter, 11/09/2013 0422 through 11/10/2013 1838 This evaluation is for the release to the environment that occurred from the Unit I PORV's 1 and 3 during the Unit 1 Cycle 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 1 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 ml/ft3

2 generators = 1.914E+08 ml 2.428E-06 laCi/ml

1.914E+08 ml = 4.647E+02 [tCi of H3 or 4.647E-04 Ci of H3 The activity of 4.647E-04 curies was added to the 3rd Quarter Table "Curies Released in Gaseous Ground Level Releases," and the 3rd 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/950/meters Beta Air 0.OOE+00 mrad 10 mrad <1 N/950/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 1.70E-07 mrem 7.5 mrem <1 SSW/4532/meters Child/Total Body 1.70E-07 mrem 7.5 mrem <1 SSW/4532/meters Population Doses Total Body Dose 2.37E-06 man-rem Maximum Organ Dose (organ) 2.37E-06 man-rem (Thyroid)

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Release Type: Gaseous (Steam)

Release Point: Unit 2 PORV's Date(s) of Release: 4th Quarter, 11/18/2013 2035 through 11/19/2013 0028 This evaluation is for the release to the environment that occurred from the Unit 1 PORV's 1 and 3 during'the Unit I Cycle 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:

" While all the PORVs were not open continuously during this period, the evaluation assumed the release was continuous from all four PORVs.

" 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 ft 3/generator

2.832E+04 ml/ft3

2 generators = 1.914E+08 ml 2.428E-06 gCi/ml

1.914E+08 ml = 4.647E+02 gCi of H3 or 4.647E-04 Ci of H3 The activity of 4.647E-04 curies was added to the 4th Quarter Table "Curies Released in Gaseous Ground Level Releases," and the 4th 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/950/meters Beta Air 0.OOE+00 mrad 10 mrad <1 N/950/meters Submersion Total' Body 0.OOE+00 mrad 10 mrad <I N/1389/meters Skin 0.OOE+00 mrad 10 mrad <1 N/1389/meters Organ Dose Child/Thyroid 1.70E-07 mrem 7.5 mrem <1 SSW/4532/meters Child/Total Body 1.70E-07 mrem 7.5 mrem <1 SSW/4532/meters Population Doses Total Body Dose 2.37E-06 man-rem Maximum Organ Dose (organ) 2.37E-06 man-rem (Thyroid)

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Liquid Effluents-Summation of Releases During the Period Starting: 1-Jan-2013 Ending: 30-Jun-2013 Est.

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

1. Total Release (Not Including Tritium, Gases, Alpha) Ci 1.41 E-02 5.12E-03 18%

2. Average Diluted Concentration During Period jiCi/ml 7.55E-09 2.81 E-09

3. Percent Of Applicable Limit %*

B. Tritium

1. Total Release Ci 1.67E+02 1.12E+02 18%

2. Average Diluted Concentration During Period pCi/ml 8.94E-05 6.14E-05

3. Percent Of Applicable Limit % *

C. Dissolved And Entrained Gases

1. Total Release Ci 0.00E+01 0.OOE+O1 39%

2. Average Diluted Concentration During Period pCi/ml 0.OOE+01 0.OOE+O1

3. Percent Of Applicable Limit % O.OOE+O1 0.OOE+01 D. Gross Alpha Radioactivity I. Total Release Curies 0.00E+O0** 0.OOE+01 N/A***

E. Total Waste Volume Released Liters 1.89E+08 1.75E+08 4%

(Pre-Dilution)

F. Volume Of Dilution Water Used Liters 1.68E+09 1.65E+09 4%

G. Radwaste Volume Released Liters 1.27E+06 9.38E+05 N/A

Applicable Limits are expressed in terms of dose. See Tables 5-8 of the 2013 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-2013 Ending: 31 -Dec-2013 Est.

Total Type Of Effluent Units Quarter 3 Quarter 4 Error A. Fission & Activation Products I. Total Release (Not Including Tritium, Gases, Alpha) Ci 3.81 E-03 4.66E-03 18%

2. Average Diluted Concentration During Period pCi/rnl 1.98E-09 2.04E-09

3. Percent Of Applicable Limit % *

B. Tritium

1. Total Release Ci 9.76E+02 3.16E+02 18%

2. Average Diluted Concentration During Period pCi/ml 5.08E-04 1.38E-04

3. Percent Of Applicable Limit % *

C. Dissolved And Entrained Gases

1. Total Release Ci 4.06E-04 4.29E-04 39%

2. Average Diluted Concentration During Period RCi/ml 2.1 IE-l10 1.88E-10

3. Percent Of Applicable Limit % 1.06E-04 9.38E-05 D. Gross Alpha Radioactivity

1. Total Release Curies 0.OOE+O1 ** 0.OOE+01 N/A***

E. Total Waste Volume Released Liters 6.17E+07 4.57E+08 4%

(Pre-Dilution)

F. Volume Of Dilution Water Used Liters 1.86E+09 1.83E+09 4%

G. Radwaste Volume Released Liters 1.80E+06 2.05E+06 N/A

Applicable Limits are expressed in terms of dose. See Tables 5-8 of the 2013 Radiological Impact Assessment Report.

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

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

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Curies Released in Liquid Effluents During the period Starting: 1-Jan-2013 Ending 3 1-Mar-2013 Continuous Batch Total Tritium 4.02E-0I 1.67E+02 1.67E+02 FISSION & ACTIVATION PRODUCTS Colbalt-57 O.OOE+O1 1.33E-06 1.33E-06 Colbalt-58 O.OOE+O I 6.56E-03 6.56E-03 Colbalt-60 O.OOE+OI 3.25E-04 3.25E-04 Cesium-137 O.OOE+01 1.86E-06 1.86E-06 I ron-55 O.OOE+01 7.03E-03 7.03E-03 Antimony- 124 O.OOE+O 1 5.36E-05 5.36E-05 Antimony- 125 O.OOE+O I 1.56E-04 1.56E-04 TOTALS O.OOE-01 1.41E-02 1.41E-02 DISSOLVED AND ENTRAINED GASES TOTALS O.OOE+OI 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: I-Apr-2013 Ending 30-Jun-2013 Continuous Batch Total Tritium 5.03E-01 1. 1E+02 1.12E+02 FISSION & ACTIVATION PRODUCTS Cobalt-57 O.OOE+O I 1.84E-05 1.84E-05 Cobalt-58 O.OOE+O I 4.25E-03 4.25E-03 Cobalt-60 O.OOE+O I 4.49E-04 4.49E-04 Iron-55 0.0013+0 1 3.96E-04 3.96E-04 O.OOE+O I Antimony-125 4.80E-06 4.80E-06 O.OOE+O I TOTALS 5.12E-03 5.12E-03 DISSOLVED AND ENTRAINED GASES TOTALS O.OOE+01 0.00+01 0.00+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-Jul-2013 Ending 30-Sep-20 13 Continuous Batch Total Tritium 2.82E-01 9.76E+02 9.76E+02 FISSION & ACTIVATION PRODUCTS Cobalt-57 0.OOE+0 1 1.1 2E-05 1.1 2E-05 Cobalt-58 0.00E+0I 2.03E-03 2.03E-03 Cobalt-60 0.OOE+01 8.13E-04 8.13E-04 Cesium-137 0.OOE+01 5.96E-06 5.96E-06 Iron-55 0.OOE+01 8.18E-04 8.18E-04 Iodine-131 0.OOE+0I 1.68E-05 1.68E-05 Antimony- 124 0.00E+01 1.68E-05 1.68E-05 Antimony-125 0.OOE+01 1.01 E-04 1.01 E-04 TOTALS 0.OOE+0 1 3.81 E-03 3.81 E-03 DISSOLVED AND ENTRAINED GASES Xenon- 133 0.OOE+0 1 3.97E-04 3.97E-04 Xenon-135 0.OOE+0I 8.32E-06 8.32E-06 TOTALS 0.OOE+0I 4.06E-04 4.06E-04

Zeroes indicate that no activity was present at detectable levels.

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Curies Released in Liquid Effluents During the period Starting: 1-Oct-2013 Ending 3 1-Dec-2013 Continuous Batch Total Tritium 9.29E-0 I 3.16E+02 3.17E+02 FISSION & ACTIVATION PRODUCTS Cobalt-58 O.OOE+0I 3.24E-04 3.24E-04 Cobalt-60 O.OOE+0 I 2.19E-04 2.19E-04 Chromium-51 0.OOE+0 1 1.77E-04 1.77E-04 Cesium-137 0.OOE+0I 3.79E-06 3.79E-06 Iron-55 0.OOE+OI 2.30E-03 2.30E-03 lodine-131 0.OOE+01 1.24E-06 1.24E-06 Antimony- 124 0.OOE+O 1 1.13E-03 1.13E-03 Antimony-125 0.OOE+0 1 5.04E-04 5.04E-04 TOTALS 0.OOE+01 4.66E-03 4.66E-03 DISSOLVED AND ENTRAINED GASES Xenon- 133 0.OOE+01 4.29E-04 4.29E-04 TOTALS 0.OOE+0I 4.29E-04 4.29E-04

Zeroes indicate that no activity was present at detectable levels.

EI-18

TABLE A LIQUID "TYPICAL LLD" EVALUATION")

At121 Nuclide ODCM LLD I 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 1.91 E-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 2.8 1E-08 2.87E-08 Cerium- 144 5.OE-06 1.11 E-07 1.12E-07 1.12E-07 Iodine-131 1.OE-06 2.28E-08 2.34E-08 2.55E-08 Krypton-87 1.OE-05 1.16E-07 5.25E-07 (3)

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

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

Nuclide ODCM LLD Typical LLD Tritium 1.OE-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 1.OE-06 1.3E-08 NOTES: (I) LLD values are in pCi/ml.

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

(3) T ' 2 too short.

EI-19

Gaseous Effluents - Summation of Releases During the Period Starting: 1-Jan-2013 Ending: 30-Jun-2013 Type of Effluent Units Quarter 1 Quarter 2 Estimated Total Error A. Fission and Activation Products

1. Total Release Ci 2.51E-01 6.79E-01 11%

2. Average Release Rate For Period jiCi/sec 3.23E-02 8.63E-02

3. Percent of Applicable Limit %*

B. Radioiodines

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

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

3. Percent of Applicable Limit %*

C. Particulates

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

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

3. Percent of Applicable Limit %* *

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

1. Total Release Ci 6.76E+00 5.27E+00 15%

2. Average Release Rate For Period iiCi/sec 8.70E-01 6.70E-01

3. Percent of Applicable Limit % *

E. Carbon-14

1. Total Release Ci 1.05E+00 1.13E+00 N/A

2. Average Release Rate For Period iiCi/sec 1.35E-01 1.44E-01

3. Percent of Applicable Limit % * *

Applicable Limits are expressed in terms of dose. See Tables 1-4 of the 2013 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.

El-20

Gaseous Effluents - Summation of Releases During the Period Starting: I-Jul-2013 Ending: 3 1-Dec2013 Type of Effluent Units Quarter 3 Quarter 4 Estimated Total Error A. Fission and Activation Products

1. Total Release Ci 8.89E+00 4.40E+01 11%

2. Average Release Rate For Period gCi/sec 1.12E+00 5.54E+00

3. Percent of Applicable Limit %*

B. Radioiodines

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

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

3. Percent of Applicable Limit % *

C. Particulates

1. Particulates (Half-Lives > 8 Days) Ci 1.06E-07 1.79E-06 16%

2. Average Release Rate For Period pCi/sec 1.34E-08 2.25E-07

3. Percent of Applicable Limit % * *

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

1. Total Release Ci 4.66E+01 1.14E+02 15%

2. Average Release Rate For Period pCi/sec 5.86E+00 1.43E+01

3. Percent of Applicable Limit % *

E. Carbon-14

1. Total Release Ci 1.36E+00 8.71E-01 N/A

2. Average Release Rate For Period pCi/sec 1.36E-0 1 1.1OE-0 1

3. Percent of Applicable Limit % * *

Applicable Limits are expressed in terms of dose. See Tables 1-4 of the 2013 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.

EI-21

Curies released Gaseous Ground Level Releases During the period.

Starting: 1-Jan-2013 Ending: 31-Mar-2013 CONTINUOUS BATCH TOTAL FISSION GASES Xenon-133 0.00E+01 5.91 E-02 5.91E-02 Xenon-135 O.OOE+01 i .72E-03 1.72E-03 Argon-41 O.OOE+O I 1.90E-0 i i.90E-01 TOTALS O.OOE+O I 2.5 1E-0I 2.5 1E-01 IODINES Iodine- 131 O.OOE+01 O.OOE+O I 0.00E+0 1 TOTALS 0.00E+0.1 O.OOE+O1 O.OOE+0 !

PARTICULATES TOTALS O.OOE+OI O.OOE+01 O.OOE+O I TRITIUM Tritium 6.63E+00 1.36E-0I 6.76E+00 CARBON- 14 Carbon-14 (CO, form) 1.05E+00 O.OOE+00 1.05E+00 Carbon-14 (Total) 5.37E+00 O.OOE+00 5.37E+00

Zeros indicate that no radioactivity was present at detectable levels.

EI-22

Curies released Gaseous Ground Level Releases During the period Starting: 1-Apr-2013 Ending: 30-Jun-2013 CONTINUOUS BATCH TOTAL FISSION GASES Xenon-133 0.00E+01 i.1 6E-01 1.16E-01 Xenon-135 0.OOE+01 9.58E-03 9.58E-03 Argon-41 0.OOE+0I 5.53E-01 5.53E-01 TOTALS O.OOE+01 6.79E-01 6.79E-01 IODINES TOTALS 0.OOE+0I O.OOE+01 0.OOE+0I PARTICULATES TOTALS 0.OOE+01 0.OOE+01 0.OOE+01 TRITIUM Tritium 3.01 E+00 2.26E+00 5.27E+00 CARBON-14 Carbon- 14 (CO? form) 1.1 3E+00 0.OOE+00 1.13E+00 Carbon- 14 (Total) 5.85E+00 0.OOE+00 5.85E+00

Zeros indicate that no radioactivity was present at detectable levels.

E1 -23

Curies released Gaseous Ground Level Releases During the period Starting: 1-July-2013 Ending: 30-Sep-2013 CONTINUOUS BATCH TOTAL FISSION GASES Xenon-138 O.OOE+O I 4.74E-04 4.74E-04 Xenon-133 O.OOE+O 1 9.53E-01 9.53E-01 Xenon-135 O.OOE+O I 2.35E-01 2.35E-0 I Argon-4 I O.OOE+O I 7.70E+00 7.70E+00 TOTALS O.OOE+O I 8.89E+00 8.89E+00 MODINES TOTALS O.OOE+O 1 O.OOE+01 0.00E+01 PARTICULATES Colbalt-58 1.06E-07 O.OOE+O I 1.06E-07 Bromine-82 1.08E-06 O.OOE+O I 1.08E-06 TOTALS 1.18E-06 O.OOE+O I 1.18E-06 TRITIUM Tritium 6.96E+00 3.96E+O I 4.66E+01 CARBON-14 Carbon-14 (CO, form) 1.08E+00 O.OOE+00 1.08E+00 Carbon- 14 (Total) 5.56E+00 O.OOE+00 5.56E+00

Zeros indicate that no radioactivity was present at detectable levels.

EI-24

Curies released Gaseous Ground Level Releases During the period Starting: 1-Oct-2013 Ending: 31 -Dec-2013 CONTINUOUS BATCH TOTAL FISSION GASES Xenon- 133 O.OOE+O I 2.53E+00 2.53E+00 Xenon-1 35 O.OOE+O0 9.58E-01 9.58E-01 Argon-41 O.OOE+OI 4.05E+01 4.05E+O1 TOTALS O.OOE+O I 4.40E+O I 4.40E+O I IODINES TOTALS O.OOE+OI O.OOE+O I O.OOE+OI PARTICULATES Colbalt-58 1.78E-06 O.OOE+O I 1.78E-06 Bromine-82 1.85E-05 O.OOE+01 1.85E-05 Copper-64 4.38E-04 O.OOE+O I 4.38E-04 TOTALS 4.58E-04 0.00E+01 4.58E-04 TRITIUM Tritium 2.83E+01 8.52E+01 1.14E+02 CARBON-14 Carbon-14 (CO, form) 8.7 i E-01 0.OOE+00 8.71 E-0 I Carbon-14 (Total) 4.48E+00 0.00E+00 4.48E+00

Zeros indicate that no radioactivity was present at detectable levels.

E1-25

TABLE B GASEOUS "TYPICAL" LLD EVALUATION(')

Noble Gas At(2)

Nuclide ODCM LLD I hr 1.5 hr Krypton-87 I.OE-04 2.08E-06 2.73E-06 Krypton-88 1.OE-04 1.61E-06 1.81E-06 Xenon-133 1.OE-04 6.61E-07 6.63E-07 Xenon- 133m 1.OE-04 2.34E-06 2.35E-06 Xenon-135 1.OE-04 3.43E-07 3.56E-07 Xenon-138 1.OE-04 1.40E-04 6.1OE-04 Particulate Sample 3) 1 hr 24 hr 7.0 day Manganese-54 1.OE- 10 7.47E- 12 3.12E- 13 4.48E- 14 Cobalt-58 I.OE- I0 5.62E- 12 2.35E-13 3.46E- 14 Iron-59 1.OE-10 1.20E-I 1 5.02E- 13 7.49E- 14 Cobalt-60 I.0E-lO0 1.07E-I I 4.46E-13 6.38E-14 Zinc-65 1OE-10 6.71E-12 2.80E-13 4.03E-14 Molybdenum-99 1.OE-10 3.43E-I I 1.61E-12 4.70E- 13 Cesium-134 1.OE-I 0 4.25E-I12 1.77E-13 2.54E-14 Cesium-I 37 1.OE-10 8.48E-12 3.54E- 13 5.05E-14 Cerium-141 1.OE-10 5.10E-12 2.15E-13 3.26E-14 Cerium- 144 1.OE-10 2.01 E- 1 I 8.33E- 13 1.20E- 13 Iodine- 131 1.OE- 10 4.76E- 12 2.07E- 13 3.77E-14 Charcoal Sample Iodine-131 I.OE- I I 7.25E-12 3.15E-13 5.74E- 14 Note:

(1) LLD values are in pCi/ml.

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

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

E1-26

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

Nuclide ODCM LLD Typical LLD Tritium L.OE-06 L.OE-l I Gross Alpha 1.0E- I I 1.5E-14 Strontium-89 1.OE- II 1.0E- 14 Strontium-90 1.OE-I I .0E- 15 NOTE:

(I) LLD values are in giCi/cc.

El-27

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 14.72 +l.00E+01 etc. Ci 3.99E+02 +2.29E+0 I

b. Dry Active Waste, Compressible Waste m3 3.54E+02 +I.00E+01 Contaminated Equipment, etc. Ci 3.5 1E+00 +2.29E+01

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

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

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

Total error (%) = (0.20' + 0.102 + 0.052)/2 x 100 = 22.9%

EI-28

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 I. Hydrogen-3 3.476E-02 0.009

2. Carbon-14 4.685E-02 0.012

3. Manganese-54 7.669E+00 1.922

4. Iron-55 3.616E+01 9.062

5. Cobalt-57 5.354E-01 0.134

6. Cobalt-58 8.948E-01 0.224

7. Cobalt-60 1.587E+02 39.773

8. Nickel-59 1.827E+00 0.458

9. Nickel-63 1.821E+02 45.637

10. Zinc-65 1.185E+00 0.297

11. Strontium-89 9.574E-03 0.002

12. Strontium-90 3.307E-02 0.008

13. Technicium-99 2.923E-03 0.001

14. Antimony-125 8.696E-03 0.002

15. Cesium-134 1.168E+00 0.293

16. Cesium-137 8.018E+00 2.009

17. Cerium-144 4.841 E-01 0.121

18. Europium-152 2.829E-03 0.001

19. Europium-154 1.974E-03 0.000

20. Europium-155 5.657E-05 0.000

21. Plutonium-238 6.433E-04 0.000

22. Plutonium-239 1.792E-04 0.000

23. Plutonium-240 1.792E-04 0.000

24. Plutonium-241 1.377E-01 0.035

25. Americium-241 3.589E-04 0.000

26. Curium-242 1.560E-05 0.000

27. Curium-243 5.541E-04 0.000 EI-29

SOLID WASTE (RADIOACTIVE SHIPMENTS) (continued)

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

Curies Percent

1. Hydrogen-3 1.019E-03 0.029

2. Carbon-14 4.744E-02 1.351

3. Chromium-51 2.512E-03 0.072

4. Manganese-54 1.098E-0 1 3.126

5. Iron-55 5.418E-01 15.425

6. Iron-59 4.316E-03 0.123

7. Cobalt-57 1.326E-02 0.378

8. Cobalt-58 1.545E+00 43.998

9. Cobalt-60 1.121E+00 31.918

10. Nickel-59 1.457E-03 0.041

11. Nickel-63 7.730E-02 2.201

12. Zinc-65 1.439E-02 0.410

13. Zirconium-95 2.623E-06 0.000

14. Niobium-95 6.013E-03 0.171

15. Cesium-137 7.943E-03 0.226

16. Cesium-144 1.200E-02 0.342

17. Plutonium-238 1.022E-05 0.000

18. Plutonium-239 4.016E-06 0.000

19. Plutonium-240 4.016E-06 0.000

20. Plutonium-241 3.313E-03 0.094 21 Americium-241 7.913E-06 0.000

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

d. Other: Mechanical Filters Curies Percent None N/A N/A El -30

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 3 Type B Motor Freight Waste Control Specialists TSD Facility Andrews, TX 2 A-LSA I1 Motor Freight Waste Control Specialists TSD Facility Andrews, TX

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

Number of Shipments Type Quantity Mode of Transportation Destination 22 A-LSA I1 Motor Freight EnergySolutions Processing Facility Oak Ridge, TN 1 Limited Quantity Motor Freight EnergySolutions Processing Facility

. Kingston, TN 2 Limited Quantity Motor Freight EnergySolutions Processing Facility Oak Ridge, TN Limited Quantity Motor Freight TVA-Hazardous Waste Storage Facility Muscle Shoals, AL 5 Exempt Quality Motor Freight EnergySolutions Processing Facility Oak Ridge, TN

c. Irradiated components, control rods, etc.

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

d. Other: Mechanical Filters of Shipments Number NnType NAMode Quantity of TransportationI Destination None N/A N/A N/A

4. Irradiated Fuel Shipments (Disposition)

Number Nof Shipments eType NAMode Quantity of Transportation

/ADestination None IN/A N/A N/A

5. Solidification of Waste Was solidification performed? No If yes, solidification media: N/A EI-31

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). A report has been submitted providing the results of any releases during this monitoring period.

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

CoC 1014 Section 5.4a states "The HI-STORM 100 Cask System does not create any radioactive material or have any radioactive waste treatment systems. Therefore, specific operating procedures for the control of radioactive effluents are not required. Specification 3.1. 1, Multi-Purpose Canister (MPC), provides assurance that there are not radioactive effluents from spent fuel storage canister."

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

Total Body <25 mrem/year Thyroid <75 mrem/year Any other organ <25 mrem/year Although CoC 1014 provides that the HI-STORM 100 Cask System does not create any radioactive material or have any radioactive waste treatment systems, for this report, total site releases include the SQN ISFSI as part of the SQN site and part of plant operations. These releases are within 40 CFR 190 limits and 10 CFR 72.104 limits.

EI-32

ENCLOSURE 2 RADIOLOGICAL IMPACT ASSESSMENT REPORT SEQUOYAH NUCLEAR PLANT 2013 E2-1

2013 SEQUOYAH NUCLEAR PLANT RADIOLOGICAL IMPACT ASSESSMENT REPORT INTRODUCTION Potential doses to maximum individuals and the population around Sequoyah Nuclear Plant (SQN) are calculated for each quarter as required in Section 5.2 of the Offsite Dose Calculation Manual (ODCM). Measured plant releases for the reporting period are used to estimate these doses. Dispersion of radioactive effluents in the environment is estimated using meteorological data and riverflow data measured during the period. In this report, the doses resulting from releases are described and compared to limits established for SQN.

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

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

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

- and -

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

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

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

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

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

- and -

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

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

- and -

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

E2-2

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

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

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

MeteoroloeicalData 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 Pointsand 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 14.75 mrem/quarter at onsite (at or near the site boundary) stations and approximately 13.50 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 2-6 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 102 mrem. Using this value, and subtracting an annual background value of 59 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 9.8 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 doseto determine compliance.

Cumulative annual total doses are presented in Table 9.

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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 1.95E-04 mrad 5 mrad <1 SSW/1840/meters Beta Air 7.62E-05 mrad 10 mrad <1 SSW/] 840/meters Submersion Total Body 1.46E-04 mrad 10 mrad <1 SSW/2129/meters Skin 2.16E-04 mrad 10 mrad <1 SSW/2129/meters Organ Doses1 (Max) Child/Bone 2.72E-01 mrem 7.5 mrem 3.63 NNE/3271/meters Child/Thyroid 5.59E-02 mrem 7.5 mrem <1 NNE/3271/meters Child/Total Body 5.59E-02 mrem 7.5 mrem <1 NNE/327 1/meters Population Doses Total Body Dose 3.80E-01 man-rem Maximum Organ Dose (organ) 1.80E+00 man-rem (Bone)

Second Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distance/Unit External Gamma Air 1.1 5E-03 mrad 5 mrad 1.26 N/950/meters Beta Air 4.38E-04 mrad 10 mrad <1 N/950/meters Submersion Total Body 6.06E-04 mrad 10 mrad <1 NNW/864/meters Skin 8.98E-04 mrad 10 mrad <I NNW/864/meters Organ Doses' (Max) Child/Bone 4.95E-01 mrem 7.5 mrem 6.60 NNE/3271/meters Child/Thyroid 1.01E-01 mrem 7.5 mrem 1.35 NNE/3271/meters Child/Total Body 1.01E-01 mrem 7.5 mrem 1.35 NNE/3271/meters Population Doses Total Body Dose 4.62E-0 Iman-rem Maximum Organ. Dose (organ) 2.22E+00 man-rem (Bone)

Populationdoses can be compared to the naturalbackgrounddosefor the entire 50-mile population ofabout 95,400 mnan-rein/'ear (basedon 90 mremniearfor naturalbackground).

'Organ Doses include contributions from Carbon-] 4 in the form of Carbon Dioxide.

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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 1.37E-02 mrad 5 mrad <1 N/950/meters Beta Air 5.12E-03 mrad 10 mrad <1 N/950/meters Submersion Total Body 8.75E-03 mrad 10 mrad <1 NNW/864/meters Skin 1.30E-02 mrad 10 mrad <1 NNW/864/meters Organ Doses' (Max) Child/Bone 4.70E-01 mrem 7.5 mrem 6.27 NNW/1586/meters Child/Thyroid 1.12E-01 mrem 7.5 mrem 1.49 NNW/1586/meters Child/Total Body 1.12E-01 mrem 7.5 mrem 1.49 NNW/1586/meters Population Doses Total Body Dose 6.74E-Olman-rem Maximum Organ Dose (organ) 2.50E+00 man-rem (Bone)

Fourth Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector/Distance/Units External Gamma Air 6.30E-02 mrad 5 mrad 1.26 N/950/meters Beta Air 2.30E-02 mrad 10 mrad <I N/950/meters Submersion Total Body 4.23E-02 mrad 10 mrad <1 SSW/2129/meters Skin 6.26E-02 mrad 10 mrad <1 SSW/2129/meters Organ Doses' (Max) Child/Bone 3.70E-Olmrem 7.5 mrem 4.93 SSW/4532/meters Child/Thyroid 1.16E-0 Imrem 7.5 mrem 1.55 SSW/4532/meters Child/Total Body 1.16E-01 mrem 7.5 mrem 1.55 SSW/4532/meters Population Doses Total Body Dose 1.04E+00 man-rem Maximum Organ Dose (organ) 2.71 E+00 man-rem (Bone)

Populationdoses can be compared to the naturalbackground dose for the entire 50-mile population of about 95.400 mnan-reinyear (basedon 90 mnremnlyear/br naturalbackground).

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

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

Quarterly Percent of Age Group Organ Dose Limit Limit Child Total Body 4.60E-04 1.5 mrem <1 %

Child Liver 4.60E-04 5 mrem <1 %

Child Thyroid 4.60E-04 5 mrem <1 %

Average Riverflow past SQN (cubic feet per second): 72016 Population Doses Total Body Dose 3.OOE-02 man-rem Maximum Organ Dose (organ) 3.OOE-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 4.50E-04 1.5 mrem <I %

Child Liver 4.50E-04 5 mrem <1 %

Child Thyroid 4.50E-04 5 mrem <1%

Average Riverflow past SQN (cubic feet per second): 49413 Population Doses Total Body Dose 3.OOE-02 man-rem Maximum Organ Dose (organ) 3.OOE-02 man-rem (Bone, Liver, GIT, Thyroid, Kidney, Lung)

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

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

Quarterly Percent of Age Group Organ Dose Limit Limit Child Total Body 4.1OE-03 1.5 mrem < 1%

Child Liver 4.1OE-03 5 mrem < 1%

Child Thyroid 4.1OE-03 5 mrem <I%

Average Riverflow past SQN (cubic feet per second): 46127 Population Doses Total Body Dose 2.70E-01 man-rem Maximum Organ Dose (organ) 2.80E-01 man-remn (GIT)

Fourth Quarter Individual Doses (wmrem_

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

Child Liver 1.40E-03 5 mrem <1 %

Child Thyroid 1.40E-03 5 mrem <1 %

Average Riverflow past SQN (cubic feet per second): 43916 Population Doses Total Body Dose 9.50E-02 man-rem Maximum Organ Dose (organ) 9.50E-02 man-rem (Bone, Liver, GIT, Thyroid, Kidney, Lung)

Populationdoses can be compared to the naturalbackgrounddose ]br the entire 50-mile population ofabout 95,400 man-rein/year(basedon 90 mrem/yearfor natural backgrountd).

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

Total body air submersion 1.46E-04 6.06E-04 8.75E-03 4.23E-02 Critical organ dose (air) 2.72E-01 4.95E-01 4.70E-01 3.70E-01I Total body dose (liquid) 4.60E-04 4.50E-04 4.1OE-03 1.40E-03 Maximum organ dose (liquid) 4.60E-04 4.50E-04 4.1OE-03 1.40E-03 Direct Radiation Dose O.OOE-00 O.OOE-00 O.OOE-00 O.OOE-00 Total 2.73E-01 4.97E-01 4.87E-01 4.15E-01 Cumulative Total Dose (Total body or any other organ) mrem 1.67E+00 Annual Dose Limit (torem) 25 Percent of Limit 6.68 Thyroid Dose (mrem Total body air submersion 1.46E-04 6.06E-04 8.75E-03 4.23E-02 Thyroid dose (airborne) 5.59E-02 1.01E-01 1.12E-01 1.16E-OI_

Total body dose (liquid) 4.60E-04 4.50E-04 4.1OE-03 1.40E-03 Thyroid dose (liquid) 4.60E-04 4.50E-04 4.1OE-03 1.40E-03 Direct Radiation Dose O.OOE-00 O.OOE-00 O.OOE-00 O.OOE-00 Total 5.70E-02 1.03E-01 1.29E-01 1.61E-01 Cumulative Total Dose (Thyroid) mrem 4.50E-0I Annual Dose Limit (mrein) 75 Percent of Limit 0.60 E2-1 1

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, 2013 - MAR 31, 2013 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000 0.000 0.000 0.000 0.237 0.047 0.000 0.000 0.000 0.284 NNE 0.000 0.000 0.000 0.379 0.568 0.379 0.047 0.000 0.000 1.373 NE 0.000 0.000 0.095 0.237 0.331 0.189 0.000 0.000 0.000 0.852 ENE 0 .000 0.000 0.000 0.237 0.000 0.000 0.000 0.000 0.000 0.237 E 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 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 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.095 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.047 0.095 0.000 0.000 0.000 0.142 SW 0.000 0.000 0.000 0.047 0.047 0.047 0.000 0.000 0.000 0.142 WSW 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.047 W 0.000 0.000 0.000 0.000 0.000 0.189 0.000 0.000 0.000 0.189 WNW 0.000 0.000 0.000 0.000 0.095 0.284 0.000 0.000 0.000 0.379 NW 0.000 0.000 0.000 0.142 0.331 0.379 0.000 0.000 0.000 0.852 NNW 0.000 0.000 0.000 0.000 0.189 0.331 0.000 0.000 0.000 0.521 SUBTOTAL 0.000 0.000 0.142 1.136 1.894 1.989 0.047 0.000 0.000 5.208 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2127 TOTAL HOURS OF STABILITY CLASS A 110 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 110 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2112 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: 2013/05/10 MEAN WIND SPEED = 7.11 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS AI-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, 2013 - MAR 31, 2013 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000 0.000 0.047 0.095 0.047 0 .142 0.000 0.000 0.000 0.331 NNE 0.000 0.000 0.000 0.237 0.142 0.237 0.047 0.000 0.000 0.663 NE 0.000 0.000 0.189 0.047 0.047 0 .142 0.000 0.000 0.000 0.426 ENE 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 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 0.047 0.000 0.000 0.000 0.000 0.000 0.047 S 0.000 0.000 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.095 SSW 0.000 0.000 0.000 0.000 0.047 0.331 0.000 0.000 0.000 0.379 SW 0.000 0.000 0.000 0.000 0.047 0.095 0.000 0.000 0.000 0.142 WSW 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.047 W 0.000 0.000 0.000 0.047 0.000 0.095 0.000 0.000 0.000 0.142 WNW 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.00o 0.000 0.047 NW 0.000 0.000 0.000 0.047 0.284 0.095 0.000 0.000 0.000 0.426 NNW 0.000 0.000 0.000 0.000 0.047 0.237 0.000 0.000 0.000 0.284 SUBTOTAL 0.000, 0.000 0.284 0.521 0.758 1.468 0.047 0.000 0.000 3.078 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2127 TOTAL HOURS OF STABILITY CLASS B 65 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 65 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2112 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: 2013/05/10 MEAN WIND SPEED = 7.26 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-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, 2013 - MAR 31, 2013 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 0.331 0.000 0.000 0.000 0.000 0.379 NNE 0.000 0.000 0.000 0.331 0.237 0.237 0.047 0.000 0.000 0.852 NE 0.000 0.000 0.237 0.379 0.237 0.095 0.000 0.000 0.000 0.947 ENE 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 E 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.095 0.000 0.000 0.000 0.000 0.000 0.095 SSE 0.000 0.000 0.000 0.095 0.000 0.047 0.000 0.000 0.000 0.142 S 0.000 0.000 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.095 SSW 0.000 0.000 0.000 0.000 0.426 0.521 0.000 0.000 0.000 0.947 SW 0.000 0.000 0.000 0.000 0.142 0.095 0.000 0.000 0.000 0.237 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 0.284 0.000 0.000 0.000 0.284 WNW 0.000 0.000 0.000 0.000 0.142 0.189 0.000 0.000 0.000 0.331 NW 0.000 0.000 0.000 0.047 0.189 0.142 0.000 0.000 0.000 0.379 NNW 0.000 0.000 0.000 0.189 0.047 0.142 0.000 0.000 0.000 0.379 SUBTOTAL 0.000 0.000 0.331 1.184 1.799 1.799 0.047 0.000 0.000 5.161 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2127 TOTAL HOURS OF STABILITY CLASS C 109 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 109 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2112 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: 2013/05/10 MEAN WIND SPEED = 6.67 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)

SEQUOYAN NUCLEAR PLANT JAN 1, 2013 - MAR 31, 2013 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 0.947 1.042 1.752 0.473 0.000 0.000 0.000 4.261 NNE 0.000 0.142 1.373 2.936 2 .841 1.894 0.284 0.047 0.000 9.517 NE 0.000 0.000 0.379 0.805 0.000 0.237 0.000 0.000 0.000 1.420 ENE 0.000 0.000 0.095 0.000 0.000 0.000 0.000 0.000 0.000 0.095 E 0.000 0.000 0.095 0.000 0.000 0.000 0.000 0.000 0.000 0.095 ESE 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.095 SE 0.000 0.047 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.095 SSE 0.000 0.047 0.095 0.142 0.000 0.095 0.000 0.000 0.000 0.379 S 0.000 0.000 0.284 0.331 0.331 0.947 0.047 0.000 0.000 1.941 SSW 0.000 0.000 1.089 2.557 1.563 0.758 0.000 0.000 0.000 5.966 SW 0.000 0.095 1.136 1.089 0.758 0.473 0.000 0.000 0.000 3.551 WSW 0.000 0.047 0.616 0.473 0.331 0.568 0.047 0.000 0.000 2.083 W 0.000 0.047 0.379 0.189 0.521 0.805 0.047 0.000 0.000 1.989 WNW 0.000 0.047 0.521 0.331 0.616 0.473 0.047 0.000 0.000 2.036 NW 0.000 0.000 0.521 0.710 1.136 0.284 0.000 0.000 0.000 2.652 NNW 0.000 0.047 0,521 0.947 0.805 0.663 0.000 0.000 0.000 2.983 SUBTOTAL 0.000 0.616 8.097 11.600 10.653 7.670 0.473 0.047 0.000 39.157 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2127 TOTAL HOURS OF STABILITY CLASS D 827 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 827 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2112 TOTAL HOURS CALM METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2013/05/10 MEAN WIND SPEED = 5.58 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-5

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

SEQUOYAH NUCLEAR PLANT JAN 1, 2013 - MAR 31, 2013 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 0.189 2.557 1.563 0.473 0.284 0.000 0.000 0.000 5.066 NNE 0.000 0.568 3.314 2.273 1.136 0.189 0.000 0.000 0.000 7.481 NE 0.000 0.189 0.663 0.189 0.047 0.047 0.000 0.000 0.000 1.136 ENE 0.000 0.000 0.095 0.000 0.000 0.000 0.000 0.000 0.000 0.095 E 0.000 0.142 0.095 0.000 0.000 0.000 0.000 0.000 0.000 0.237 ESE 0.000 0.142 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.189 SE 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 SSE 0.000 0.047 0.331 0.095 0.047 0.047 0.000 0.000 0.000 0.568 S 0.000 0.331 0.900 0.900 0.095 1.468 0.000 0.000 0.000 3.693 SSW 0.000 0.284 2.794 1.373 0.663 0.189 0.000 0.000 0.000 5.303 SW 0.000 0.237 1.610 0.758 0.616 0.331 0.000 0.000 0.000 3.551 WSW 0.000 0.000 0.331 0 .142 0.000 0.095 0.047 0.000 0.000 0.616 W 0.000 0.142 0.331 0.047 0.047 0.047 0.000 0.000 0.000 0.616 WNW 0.000 0.047 0.568 0.284 0.189 0.000 0.000 0.000 0.000 1.089 NW 0.000 0.189 0.284 0.758 0.095 0.000 0.000 0.000 0.000 1.326 NNW 0.000 0.047 0.663 0.521 0.142 0.047 0.000 0.000 0.000 1.420 SUBTOTAL 0.000 2.557 14.631 8.902 3.551 2.746 0.047 0.000 0.000 32.434 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2127 TOTAL HOURS OF STABILITY CLASS E 693 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 685 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2112 TOTAL HOURS CALM METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2013/05/10 MEAN WIND SPEED = 3.86 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A1-6

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, 2013 - MAR 31, 2013 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 0.426 0.000 0.000 0.047 0.000 0.000 0.000 0.521 NNE 0.000 0.095 2.652 0.379 0.047 0.000 0.000 0.000 0.000 3.172 NE 0-. 000 0.047 1.373 0.189 0.000 0.000 0.000 0.000 0.000 1.610 ENE 0.000 0.142 0.095 0.047 0.000 0.000 0.000 0.000 0.000 0.284 E 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 ESE 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 SE 0.000 0.000 0.095 0.000 0.000 0.000 0.000 0.000 0.000 0.095 SSE 0.000 0.047 0.189 0.000 0.000 0.000 0.000 0.000 0.000 0.237 S 0.000 0.284 0.284 0.047 0.000 0.000 0.000 0.000 0.000 0.616 SSW 0.000 0.000 1.563 0.331 0.000 0.000 0.000 0.000 0.000 1.894 SW 0.000 0.142 1.326 0.521 0.095 0.000 0.000 0.000 0.000 2.083 WSW 0.000 0.047 0.331 0.095 0.000 0.000 0.000 0.000 0.000 0.473 W 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 WNW 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 NW 0.000 0.047 0.189 0.000 0.000 0.000 0.000 0.000 0.000 0.237 NNW 0.000 0.000 0.142 0.000 0.000 0.000 0.000 0.000 0.000 0.142 SUBTOTAL 0.000 0.947 8.759 1.610 0.189 0.047 0.000 0.000 0.000 11.553 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2127 TOTAL HOURS OF STABILITY CLASS F 249 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 244 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2112 TOTAL HOURS CALM METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2013/05/10 MEAN WIND SPEED = 2.60 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS A1-7

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

SEQUOYAH NUCLEAR PLANT JAN 1, 2013 - MAR 31, 2013 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.616 0.000 0.000 0.000 0.000 0.000 0.000 0.616 NE 0.000 0.047 0.900 0.047 0.000 0.000 0.000 0.000 0.000 0.994 ENE 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 E 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.095 ESE 0.000 0.000 0.095 0.000 0.000 0.000 0.000 0.000 0.000 0.095 SE 0.000 0.095 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.142 SSE 0.000 0.000 0 .142 0.000 0.000 0.000 0.000 0.000 0.000 0.142 S 0.000 0.142 0.142 0.047 0.000 0.000 0.000 0.000 0.000 0.331 SSW 0.000 0.047 0.379 0.000 0.000 0.000 0.000 0.000 0.000 0.426 SW 0.000 0.000 0.379 0.000 0.000 0.000 0.000 0.000 0.000 0.379 WSW 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 W 0.000 0.000 0.047 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.426 2.841 0.142 0.000 0.000 0.000 0.000 0.000 3.409 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2127 TOTAL HOURS OF STABILITY CLASS G 74 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 72 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2112 TOTAL HOURS CALM METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2013/05/10 MEAN WIND SPEED = 2.17-NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-8

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

SEQUOYAH NUCLEAR PLANT APR 1, 2013 - JUN 30, 2013 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000 0.000 0.000 0.046 0.139 0.139 0.000 0.000 0.000 0 .325 NNE 0.000 0.000 0.093 0 .557 0.650 0.232 0.000 0.000 0.000 1.532 NE 0.000 0.000 0.093 0.743 0.650 0.279 0.000 0.000 0.000 1.764 ENE 0.000 0.000 0.046 0.464 0.000 0.000 0.000 0.000 0.000 0.511 E 0.000 0.000 0.046 0.093 0.000 0.000 0.000 0.000 0.000 0.139 ESE 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.000 0.093 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.046 0.186 0.046' 0.000 0.000 0.000 0.000 0.279 SW 0.000 0.000 0.046 0.000 0.279 0.046 0.000 0.000 0.000 0.371 WSW 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 W 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 WNW 0.000 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.093 NW 0.000 0.000 0.000 0.000 0.046 0.093 0.000 0.000 0.000 0.139 NNW 0.000 0.000 0.000 0.093 0.232 0.000 0.000 0.000 0.000 0.325 SUBTOTAL 0.000 0.000 0.371 2.275 2.228 0.789 0.000 0.000 0.000 5.664 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2167 TOTAL HOURS OF STABILITY CLASS A 122 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 122 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2154 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: 2013/08/15 MEAN WIND SPEED = 5.71 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, 2013 - JUN 30, 2013 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.093 NNE 0.000 0.000 0.046 0.464 0.093 0.046 0.000 0.000 0.000 0.650 NE 0.000 0.000 0.093 0.186 0.093 0.000 0.000 0.000 0.000 0.371 ENE 0.000 0.000 0.139 0.046 0.000 0.000 0.000 0.000 0.000 0.186 E 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.093 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 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 S 0.000 0.000 0.000 0.000 0.139 0.186 0.000 0.000 0.000 0.325 SSW 0.000 0.000 0.000 0.046 0.464 0.139 0.000 0.000 0.000 0.650 SW 0.000 0.000 0.000 0.093 0.325 0.046 0.000 0.000 0.000 0.464 WSW 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.093 W 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 WNW 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.000 0.093 NW 0.000 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.093 NNW 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 SUBTOTAL 0.000 0.000 0.418 1.068 1.393 0.418 0.000 0.000 0.000 3.296 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2167 TOTAL HOURS OF STABILITY CLASS B 71 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 71 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2154 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: 2013/08/15 MEAN WIND SPEED = 5.63 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-IO

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

SEQUOYAH NUCLEAR PLANT APR 1, 2013 - JUN 30, 2013 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 0.093 0.000 0.000 0.000 0.000 0.186 NNE 0.000 0.000 0.139 0.279 0.000 0.186 0.000 0.000 0.000 0.604 NE 0.000 0.000 0.279 0.139 0.093 0.000 0.000 0.000 0.000 0.511 ENE 0.000 0.000 0.232 0.000 0.000 0.000 0.000 0.000 0.000 0.232 E 0.000 0.000 0.139 0.000 0.000 0.000 0.000 0.000 0.000 0.139 ESE 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SE 0.000 0.000 0.093 0.046 0.046 0.000 0.000 0.000 0.000 0.186 SSE 0.000 0.000 0.046 0.139 0.093 0.000 0.000 0.000 0.000 0.279 S 0.000 0.000 0.000 0.186 0.464 0.000 0.000 0.000 0.000 0.650 SSW 0.000 0.000 0.139 0.418 0.789 0.186 0.000 0.000 0.000 1.532 SW 0.000 0.000 0.093 0.789 0.232 0.046 0.000 0.000 0.000 1.161 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 0.046 0.093 0.046 0.000 0.000 0.000 0.186 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 0.186 0.000 0.000 0.000 0.000 0.186 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 1.207 2.136 2.089 0.464 0.000 0.000 0.000 5.896 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2167 TOTAL HOURS OF STABILITY CLASS C 127 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 127 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2154 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: 2013/08/15 MEAN WIND SPEED = 5.04 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-II

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, 2013 - JUN 30, 2013 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000 0.046 0.325 0.789 0.232 0.000 0.000 0.000 0.000 1.393 NNE 0.000 0.046 0.975 1.486 0.511 0.464 0.000 0.000 0.000 3.482 NE 0.000 0.046 0.696 0.464 0.046 0.046 .0.000 0.000 0.000 1.300 ENE 0.000 0.046 0.279 0.093 0.000 0.000 0.000 0.000 0.000 0.418 E 0.000 0.000 0.232 0.046 0.000 0.000 0.000 0.000 0.000 0.279 ESE 0.000 0.000 0.139 0.000 0.000 0.000 0.000 0.000 0.000 0.139 SE 0.000 0.046 0.232 0.093 0.093 0.000 0.000 0.000 0.000 0.464 SSE 0.000 0.093 0.836 0.557 0.186 0.000 0.000 0.000 0.000 1.671 S 0.000 0.186 1.996 2 .553 0.975 0. 604 0.000 0.000 0.000 6.314 SSW 0.000 0.000 2.925 5.617 1.764 0.418 0.000 0.000 0.000 10.724 SW 0.000 0.000 0.929 2.321 1.114 0.186 0.000 0.000 0.000 4.550 WSW 0.000 0.046 0.139 0 .325 0.046 0.046 0.000 0.000 0.000 0.604 W 0.000 0.046 0.139 0.186 0.325 0.093 0.000 0.000 0.000 0.789 WNW 0.000 0.000 0.186 0.186 0.139 0.046 0.000 0.000 0.000 0.557 NW 0.000 0.000 0.093 0.371 0.139 0.000 0.000 0.000 0.000 0.604 NNW 0.000 0.046 0.232 0.371 0.418 0.000 0.000 0.000 0.000 1.068 SUBTOTAL 0.000 0.650 10.353 15.460 5.989 1.903 0.000 0.000 0.000 34.355 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2167 TOTAL HOURS OF STABILITY CLASS D 743 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 740 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2154 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: 2013/08/15 MEAN WIND SPEED = 4.40 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, 2013 - JUN 30, 2013 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 0.004 0.604 1.346 0.789 0.232 0.000 0.000 0.000 0.000 2.975 NNE 0.007 0.836 2.832 1.068 0.186 0.000 0.000 0.000 0.000 4.928 NE 0.003 0.511 1.161 0.186 0.000 0.000 0.000 0.000 0.000 1.860 ENE 0.001 0.046 0.325 0.000 0.000 0.000 0.000 0.000 0.000 0.372 E 0.001 0.139 0.139 0.046 0.000 0.000 0.000 0.000 0.000 0.326 ESE 0.001 0 .232 0.186 0.000 0.000 0.000 0.000 0.000 0.000 0.419 SE 0.002 0.418 0.371 0.139 0.000 0.000 0.000 0.000 0.000 0.930 SSF 0.002 0.371 0.650 0.325 0.139 0.093 0.000 0.000 0.000 1.581 S 0.004 0 .279 1.950 0.882 0.418 0.232 0.046 0.000 0.000 3.811 SSW 0.010 0.325 4.689 1.671 0.232 0.093 0.000 0.000 0.000 7.020 SW 0.005 0.093 2.368 1.346 0.325 0.000 0.000 0.000 0.000 4.137 WSW 0.002 0.046 0.743 0.139 0.046 0.000 0.000 0.000 0.000 0.977 W 0.001 0.000 0.325 0.139 0.139 0.000 0.000 0.000 0.000 0.604 WNW 0.001 0.139 0.279 0.139 0.046 0.000 0.000 0.000 0.000 0.604 NW 0.002 0.186 0.604 0.093 0.000 0.000 0.000 0.000 0.000 0.884 NNW 0.002 0.279 0.743 0.325 0.186 0.046 0.000 0.000 0.000 1.581 SUBTOTAL 0.046 4.503 18.709 7.289 1.950 0.464 0.046 0.000 0.000 33.008 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2167 TOTAL HOURS OF STABILITY CLASS E 717 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 711 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2154 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2013/08/15 MEAN WIND SPEED = 2.92 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, 2013 - JUN 30, 2013 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 0.093 0.418 0.000 0.000 0.000 0.000 0.000 0.000 0.511 NNE 0.000 0.511 3.110 0.093 0.000 0.000 0.000 0.000 0.000 3.714 NE 0.000 0.464 0.929 0.046 0.000 0.000 0.000 0.000 0.000 1.439 ENE 0.000 0.186 0.325 0.000 0.046 0.000 0.000 0.000 0.000 0.557 E 0.000 0.186 0.186 0.000 0.000 0.000 0.000 0.000 0.000 0.371 ESE 0.000 0.139 0.186 0.000 0.000 0.000 0.000 0.000 0.000 0.325 SE 0.000 0.232 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.325 SSE 0.000 0.186 0.511 0.000 0.000 0.000 0.000 0.000 0.000 0.696 S 0.000 0.139 1.207 0.046 0.000 0.000 0.000 0.000 0.000 1.393 SSW 0.000 0.139 1.578 0.046 0.000 0.000 0.000 0.000 0.000 1.764 SW 0.000 0.000 0.696 0.093 0.000 0.000 0.000 0.000 0.000 0.789 WSW 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.093 W 0.000 0.000 0.093 0.046 0.000 0.000 0.000 0.000 0.000 0.139 WNW 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 NW 0.000 0.046 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.139 NNW 0.000 0.093 0.279 0.093 0.000 0.000 0.000 0.000 0.000 0.464 SUBTOTAL 0.000 2.414 9.703 0.604 0.046 0.000 0.000 0.000 0.000 12.767 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2167 TOTAL HOURS OF STABILITY CLASS F 279 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 275 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2154 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: 2013/08/15 MEAN WIND SPEED = 2.08 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, 2013 - JUN 30, 2013 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 0.046 0.325 0.000 0.000 0.000 0.000 0.000 0.000 0.371 NE 0.000 0.000 0.696 0.000 0.000 0.000 0.000 0.000 0.000 0.696 ENE 0.000 0.139 0.232 0.000 0.000 0.000 0.000 0.000 0.000 0.371 E 0.000 0.093 0.232 0.000 0.000 0.000 0.000 0.000 0.000 0.325 ESE 0.000 0.232 0.139 0.000 0.000 0.000 0.000 0.000 0.000 0.371 SE 0.000 0.139 0.139 0.000 0.000 0.000 0.000 0.000 0.000 0.279 SSE 0.000 0.186 0.186 0.000 0.000 0.000 0.000 0.000 0.000 0.371 S 0.000 0.325 0.418 0.000 0.000 0.000 0.000 0.000 0.000 0.743 SSW 0.000 0.093 0.836 0.000 0.000 0.000 0.000 0.000 0.000 0.929 SW 0.000 0.000 0.325 0.000 0.000 0.000 0.000 0.000 0.000 0.325 WSW 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 W 0.000 0.000 0.000 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 0.046 0.000 0.000 0.000 0.000 0.000 0.046 NNW 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 SUBTOTAL 0.000 1.300 3.621 0.093 0.000 0.000 0.000 0.000 0.000 5.014 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2167 TOTAL HOURS OF STABILITY CLASS G 108 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 108 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2154 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: 2013/08/15 MEAN WIND SPEED = 1.84 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, 2013 - SEP 30, 2013 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 0.045 0.182 0.136 0.000 0.000 0.000 0.000 0.364 NNE 0.000 0.000 0.227 0.864 0.500 0.182 0.000 0.000 0.000 1.774 NE 0.000 0.045 0.182 0.864 0.227 0.000 0.000 0.000 0.000 1.319 ENE 0.000 0.000 0.136 0.045 0.000 0.000 0.000 0.000 0.000 0.182 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.045 0.591 1.955 0.864 0.182 0.000 0.000 0.000 3.638 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2199 TOTAL HOURS OF STABILITY CLASS A 80 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 80 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2199 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: 2013/11/12 MEAN WIND SPEED = 4.82 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, 2013 - SEP 30, 2013 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 0.045 0.091 0.091 0.000 0.000 0.000 0.000 0.227 NNE 0.000 0.000 0.318 0.546 0.273 0.091 0.000 0.000 0.000 1.228 NE 0.000 0.000 0.273 0.409 0.000 0.000 0.000 0.000 0.000 0.682 ENE 0.000 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.091 9 0.000 0.000 0.091 0.000 0.045 0.000 0.000 0.000 0.000 0.136 ESE 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.045 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.864 1.137 0.409 0.091 0.000 0.000 0.000 2.501 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2199 TOTAL HOURS OF STABILITY CLASS B 55 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 55 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2199 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: 2013/11/12 MEAN WIND SPEED = 4.35 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, 2013 - SEP 30, 2013 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 0.045 0.273 0.091 0.000 0.000 0.000 0.000 0.409 NNE 0.000 0.000 0.364 0.591 0.182 0.000 0.000 0.000 0.000 1.137 NE 0.000 0.000 0.318 0.273 0.045 0.000 0.000 0.000 0.000 0.637 ENE 0.000 0.000 0.045 0.136 0.000 0.000 0.000 0.000 0.000 0.182 E 0.000 0.000 0.045 0.136 0.000 0.000 0.000 0.000 0.000 0.182 ESE 0.000 0.000 0.091 0.045 0.000 0.000 0.000 0.000 0.000 0.136 SE 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.045 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0:000 0.000 0.000 SSW 0.000 0.000 0.000 0.182 0.182 0.000 0.000 0.000 0.000 0.364 SW 0.000 0.000 0.000 0.455 0.045 0.000 0.000 0.000 0.000 0.500 WSW 0.000 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.091 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 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 1.000 2.228 0.591 0.000 0.000 0.000 0.000 3.820 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2199 TOTAL HOURS OF STABILITY CLASS C 84 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 84 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2199 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: 2013/11/12 MEAN WIND SPEED = 4.28 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, 2013 - SEP 30, 2013 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 0.003 0.136 1.228 0.409 0.318 0.045 0.000 0.000 0.000 2.140 NNE 0.003 0.091 1.182 1.000 1.046 0.000 0.000 0.000 0.000 3.322 NE 0.002 0.182 0.773 0.182 0.000 0.000 0.000 0.000 0.000 1.139 ENE 0.001 0.091 0.591 0.091 0.045 0.000 0.000 0.000 0.000 0.820 E 0.001 0.000 0.546 0.136 0.000 0.000 0.000 0.000 0.000 0.683 ESE 0.001 0.045 0.364 0.136 0.000 0.000 0.000 0.000 0.000 0.547 SE 0.002 0.045 0.682 0 .273 0.000 0.000 0.000 0.000 0.000 1.002 SSE 0.004 0.182 1.683 0.728 0.227 0.000 0.000 0.000 0.000 2.824 S 0.008 0.227 3.638 2 .774 0.318 0.000 0.000 0.000 0.000 6.966 SSW 0.009 0.136 4.047 5.548 0.910 0.000 0.000 0.000 0.000 10.650 SW 0.007 0.182 2.819 2.274 0.136 0.000 0.000 0.000 0.000 5.418 WSW 0.001 0.136 0.546 0.136 0.000 0.000 0.000 0.000 0.000 0.820 W 0.001 0.091 0.227 0.136 0.000 0.000 0.000 0.000 0.000 0.455 WNW 0.000 0.045 0.091 0.182 0.000 0.000 0.000 0.000 0.000 0.319 NW 0.000 0.182 0.045 0.091 0.045 0.000 0.000 0.000 0.000 0.364 NNW 0.001 0.182 0.500 0.273 0.091 0.045 0.000 0.000 0.000 1.093 SUBTOTAL 0.045. 1.955 18.963 14.370 3.138 0.091 0.000 0.000 0.000 38.563 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2199 TOTAL HOURS OF STABILITY CLASS D 848 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 848 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2199 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2013/11/12 MEAN WIND SPEED = 3.40 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, 2013 - SEP 30, 2013 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.006 1.273 3.502 1.091 0.091 0.000 0.000 0.000 0.000 5.964 NNE 0.007 1.091 4.593 1.728 0.045 0.000 0.000 0.000 0.000 7.465 NE 0.003 1.000 1.637 0.045 0.000 0.000 0.000 0.000 0.000 2.687 ENE 0.001 0.273 0.500 0.045 0.000 0.000 0.000 0.000 0.000 0.820 E 0.001 0.364 0.318 0.045 0.000 0.000 0.000 0.000 0.000 0.729 ESE 0.002 0.591 0.728 0.045 0.000 0.000 0.000 0.000 0.000 1.366 SE 0.001 0.409 0.546 0.182 0.000 0.000 0.000 0.000 0.000 1.138 SSE 0.003 0.728 1.319 0.045 0.000 0.000 0.000 0.000 0.000 2.095 S 0.004 0.728 2.365 0.273 0.000 0.000 0.000 0.000 0.000 3.369 SSW 0.004 0.546 2.729 0.318 0.091 0.000 0.000 0.000 0.000 3.688 SW 0.005 0.227 3.320 1.228 0.000 0.000 0.000 0.000 0.000 4.780 WSW 0.003 0.591 1.410 0.227 0.000 0.000 0.000 0.000 0.000 2.231 W 0.001 0.364 0.637 0.091 0.000 0.000 0.000 0.000 0.000 1.093 WNW 0.001 0.364 0.227 0.091 0.045 0.000 0.000 0.000 0.000 0.728 NW 0.001 0.273 0.318 0.091 0.000 0.000 0.000 0.000 0.000 0.683 NNW 0.002 0.409 1.182 0.000 0.000 0.000 0.000 0.000 0.000 1.594 SUBTOTAL 0.045 9.231 25.330 5.548 0.273 0.000 0.000 0.000 0.000 40.427 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2199 TOTAL HOURS OF STABILITY CLASS E 889 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 889 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2199 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2013/11/12 MEAN WIND SPEED = 2.27 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, 2013 - SEP 30, 2013 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 0.546 1.683 0.227 0.000 0.000 0.000 0.000 0.000 2 .456 NNE 0.000 0.637 3.092 0.182 0.045 0.000 0.000 0.000 0.000 3.956 NE 0.000 0.273 0.728 0.000 0.000 0.000 0.000 0.000 0.000 1.000 ENE 0.000 0.091 0.273 0.000 0.000 0.000 0.000 0.000 0.000 0.364 E 0.000 0.045 0.273 0.000 0.000 0.000 0.000 0.000 0.000 0.318 ESE 0.000 0.273 0.182 0.000 0.000 0.000 0.000 0.000 0.000 0.455 SE 0.000 0.045 0.182 .0.000 0.000 0.000 0.000 0.000 0.000 0.227 SSE 0.000 0.045 0.318 0.000 0.000 0.000 0.000 0.000 0.000 0.364 S 0.000 0.136 0.318 0.045 0.000 0.000 0.000 0.000 0.000 0.500 SSW 0.000 0.091 0.227 0.091 0.000 0.000 0.000 0.000 0.000 0.409 SW 0.000 0.000 0.136 0.000 0.000 0.000 0.000 0.000 0.000 0.136 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 0.091 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.136 NNW 0.000 0.091 0.227 0.045 0.000 0.000 0.000 0.000 0.000 0.364 SUBTOTAL 0.000 2.365 7.731 0.591 0.045 0.000 0.000 0.000 0.000 10.732 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2199 TOTAL HOURS OF STABILITY CLASS F 236 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 236 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2199 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: 2013/11/12 MEAN WIND SPEED = 2.04 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, 2013 - SEP 30, 2013 WIND WIND SPEED (MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000. 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.045 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.091 SW 0.000 0.000 0.045 0.045 0.000 0.000 0.000 0.000 0.000 0.091 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 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.045 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.045 0.182 0.091 0.000 0.000 0.000 0.000 0.000 0.318 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2199 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 2199 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: 2013/11/12 MEAN WIND SPEED = 2.44 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, 2013 - DEC 31, 2013 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000 0.000 0.000 0.046 0.182 0.046 0.000 0.000 0.000 0.273 NNE 0.000 0.000 0.091 0.455 0.910 0.683 0.000 0.000 0.000 2.139 NE 0.000 0.000 0.182 0.455 0. 182 0.091 0.000 0.000 0.000 0.910 ENE 0.000 0.046 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.137 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 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.182 0.000 0.000 0.000 0.000 0.182 SSW 0.000 0.000 0.000 0.046 0.182 0.000 0.000 0.000 0.000 0.228 SW 0.000 0.000 0.000 0.046 0.091 0.000 0.000 0.000 0.000 0.137 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 0.046 0.000 0.000 0.000 0.046 NW 0.000 0.000 0.000 0.000 0.091 0.046 0.000 0.000 0.000 0.137 NNW 0.000 0.000 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.091 SUBTOTAL 0.000 0.046 0.364 1.092 1.821 1.001 0.000 0.000 0.000 4.324 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2197 TOTAL HOURS OF STABILITY CLASS A 95 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 95 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2197 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: 2014/02/26 MEAN WIND SPEED = 6.13 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, 2013 - DEC 31, 2013 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 .228 0.182 0.137 0.000 0.000 0.000 0.546 NNE 0.000 0.000 0.046 0.546 0.137 0.364 0.000 0.000 0.000 1.092 NE 0.000 0.000 0.046 0 .273 0.000 0.000 0.000 0.000 0.000 0.319 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 SSE 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 S 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.091 SSW 0.000 0.000 0.000 0.137 0.319 0.091 0.000 0.000 0.000 0.546 SW 0.000 0.000 0.000 0 .137 0.228 0.000 0.000 0.000 0.000 0.364 WSW 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.091 NNW 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 SUBTOTAL 0.000 0.000 0.228 1.457 0.956 0.637 0.000 0.000 0.000 3.277 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2197 TOTAL HOURS OF STABILITY CLASS B 72 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 72 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2197 TOTAL HOURS CALM METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/02/26 MEAN WIND SPEED = 5.87 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-24

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

SEQUOYAH NUCLEAR PLANT OCT 1, 2013 - DEC 31, 2013 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 0.091 0.228 0.228 0.046 0.000 0.000 0.592 NNE 0.000 0.000 0.046 0.273 0.410 0.273 0.046 0.000 0.000 1.047 NE 0.000 0.000 0.273 0.137 0.091 0.000 0.000 0.000 0.000 0.501 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 0.137 0.000 0.000 0.000 0.000 0.000 0.137 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 0.046 0.000 0.000 0.000 0.000 0.046 SSW 0.000 0.000 0.046 0.455 0.319 0.091 0.000 0.000 0.000 0.910 SW 0.000 0.000 0.091 0.501 0.319 0.000 0.000 0.000 0.000 0.910 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 0.046 0.000 0.000 0.000 0.000 0.000 0.046 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 0.046 0.046 0.000 0.000 0.000 0.000 0.091 SUBTOTAL 0.000 0.000 0.546 1.775 1.502 0.592 0.091 0.000 0.000 4.506 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2197 TOTAL HOURS OF STABILITY CLASS C 99 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 99 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2197 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: 2014/02/26 MEAN WIND SPEED = 5.66 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, 2013 - DEC 31, 2013 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 0.137 0.546 1.229 1.457 1.457 0.000 0.000 0.000 4.825 NNE 0.000 0.046 2.367 1.821 1.821 2.777 0.137 0.000 0.000 8.967 NE 0.000 0.046 1.411 0.319 0.137 0.000 0.000 0.000 0.000 1.912 ENE 0.000 0.046 0.410 0.046 0.000 0.000 0.000 0.000 0.000 0.501 E 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 ESE 0.000 0.137 0.228 0.000 0.000 0.000 0.000 0.000 0.000 0.364 SE 0.000 0.091 0.182 0.000 0.000 0.000 0.000 0.000 0.000 0.273 SSE 0.000 0.091 0.182 0.091 0.046 0.000 0.000 0.000 0.000 0.410 S 0.000 0.137 1.502 0.774 0.501 0.182 0.000 0.000 0.000 3.095 SSW 0.000 0.000 1.912 3.050 0.546 0.137 0.000 0.000 0.000 5.644 SW 0.000 0.091 2.003 1.912 0.683 0.046 0.000 0.000 0.000 4.734 WSW 0.000 0.000 0.319 0.046 0.000 0.000 0.000 0.000 0.000 0.364 W 0.000 0.000 0.091 0.091 0.046 0.000 0.000 0.000 0.000 0 .228 WNW 0.000 0.046 0.046 0.046 0.137 0.000 0.000 0.000 0.000 0.273 NW 0.000 0.046 0.182 0.273 0.410 0.091 0.000 0.000 0.000 1.001 NNW 0.000 0.046 0.182 0.455 0.910 0.364 0.000 0.000 0.000 1.957 SUBTOTAL 0.000 1.001 11.561 10..150 6.691 5.052 0.137 0.000 0.000 34.593 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2197 TOTAL HOURS OF STABILITY CLASS D 760 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 760 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2197 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: 2014/02/26 MEAN WIND SPEED = 4.85 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS Al-26

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

SEQUOYAH NUCLEAR PLANT OCT 1, 2013 - DEC 31, 2013 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 0.007 0.546 3.186 1.730 0.637 0.091 0.000 0.000 0.000 6.197 NNE 0.009 0.865 4.005 1.684 0.455 0.182 0.000 0.000 0.000 7.200 NE 0.002 0.546 0.455 0.137 0.046 0.000 0.000 0.000 0.000 1.185 ENE 0.001 0.410 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.456 E 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.091 ESE 0.000 0.137 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.182 SE 0.000 0.137 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.228 SSE 0.002 0.546 0.319 0.046 0.000 0.000 .0.000 0.000 0.000 0.912 S 0.005 0.910 1.684 0.364 0.046 0.592 0.000 0.000 0.000 3.600 qSW 0.008 0.455 4.142 1.047 0.228 0.137 0.000 0.000 0.000 6.016 SW 0.005 0.137 2 .503 0.728 0.046 0.046 0.000 0.000 0.000 3.464 WSW 0.002 0.091 0.865 0.091 0.046 0.000 0.000 0.000 0.000 1.094 W 0.001 0.137 0.455 0.046 0.000 0.046 0.000 0.000 0.000 0.684 WNW 0.000 0.091 0.137 0.091 0.046 0.000 0.000 0.000 0.000 0.365 NW 0.001 0.091 0.455 0.137 0.000 0.046 0.000 0.000 0.000 0.729 NNW 0.003 0.364 1.274 0.637 0.273 0.137 0.000 0.000 0.000 2.688 SUBTOTAL 0.046 5.553 19.663 6.736 1.821 1.274 0.000 0.000 0.000 35.093 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2197 TOTAL HOURS OF STABILITY CLASS E 771 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 771 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2197 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: SEQUOYAH NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 2014/02/26 MEAN WIND SPEED = 3.00 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, 2013 - DEC 31, 2013 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 0.410 2.685 0.182 0.000 0.000 0.000 0.000 0.000 3.277 NNE 0,000 0.774 5.644 0.137 0.000 0.000 0.000 0.000 0.000 6.554 NE 0,000 0.637 0.865 0.000 0.000 0.000 0.000 0.000 0.000 1.502 ENE 0.000 0.273 0.182 0.000 0.000 0.000 0.000 0.000 0.000 0.455 E 0.000 0.137 0.091 0.000 -0.000 0.000 0.000 0.000 0.000 0.228 ESE 0,000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.091 SE 0,000 0.273 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.319 SSE 0.000 0.228 0.182 0.000 0.000 0.000 0.000 0.000 0.000 0.410 S 0,000 0.364 0.319 0.046 0.000 0.000 0.000 0.000 0.000 0.728 SSW 0,000 0.182 0.774 0.000 0.000 0.000 0.000 0.000 0.000 0.956 SW 0,000 0.046 0.774 0.000 0.000 0.000 0.000 0.000 0.000 0.819 WSW 0,000 0.000 0.273 0.046 0.000 0.000 0.000 0.000 0.000 0.319 W 0,000 0.046 0.091 0.046 0.000 0.000 0.000 0.000 0.000 0.182 WNW 0,000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.091 NW 0,000 0.091 0.091 0.046 0.000 0.000 0.000 0.000 0.000 0.228 NNW 0,000 0.046 0.228 0.046 0.000 0.000 0.000 0.000 0.000 0.319 SUBTOTAL 0.000 3.596 12.335 0.546 0.000 0.000 0.000 0.000 0.000 16.477 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2197 TOTAL HOURS OF STABILITY CLASS F 362 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 362 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2197 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: 2014/02/26 MEAN WIND SPEED = 2.04 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, 2013 - DEC 31, 2013 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.273 0.000 0.000 0.000 0.000 0.000 0.000 0.273 NE 0.000 0.046 0.182 0.000 0.000 0.000 0.000 0.000 0.000 0.228 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 0.228 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.228 SE 0.000 0.091 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.137 SSE 0.000 0.137 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.137 S 0.000 0.137 0.137 0.000 0.000 0.000 0.000 0.000 0.000 0.273 SSW 0.000 0.046 0.182 0.000 0.000 0.000 0.000 0.000 0.000 0.228 SW 0.000 0.046 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.137 WSW 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SUBTOTAL 0.000 0.728 1.001 0.000 0.000 0.000 0.000 0.000 0.000 1.730 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2197 TOTAL HOURS OF STABILITY CLASS G 38 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 38 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2197 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: 2014/02/26 MEAN WIND SPEED = 1.76 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 December 17, 2013 1/2.1.1 During the performance of Chemistry Surveillance Table 1.1-1 Instruction 0-SI-CEM-040-42 1.1, Turbine Building Item 2a, Sump or ERCW Inoperable Radiation Monitors, Chemistry personnel missed a 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months sample requirement. PER 824084.

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, 1-RM-90-400 was declared inoperable on June 11, 2012, due to the inoperability of the 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. The station is going to replace the radiation monitor.

June 5, 2013 Unit 2 Shield Building Exhaust System Radiation Monitor, 2-RM 400 was declared inoperable on June 5, 2013. The Vent Flow Monitor was declared inoperable. A card was ordered from the Vendor and I replaced. The monitor was returned to service July 18, 2013.

A4-1

ML14118A380

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