ML11152A160

Response to Request for Information from Public Meeting on May 11, 2011

ML11152A160
Person / Time
Site:	Watts Bar
Issue date:	05/26/2011
From:	Stinson D Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML11152A160 (39)

Text

Tennessee Valley Authority, Post Office Box 2000, Spring City, Tennessee 37381-2000 May 26, 2011 10 CFR 50.4(b)(6) 10 CFR 50.34(b)

U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555-0001 Watts Bar Nuclear Plant, Unit 2 NRC Docket No. 50-391

Subject:

WATTS BAR NUCLEAR PLANT (WBN) UNIT 2 - RESPONSE TO REQUEST FOR INFORMATION FROM PUBLIC MEETING ON MAY 11, 2011

References:

1.

E-mail from Justin C. Poole, U.S. Nuclear Regulatory Commission to William D. Crouch, TVA dated May 11, 2011

2.

TVA to NRC letter dated May 20, 2011, "Watts Bar Nuclear Plant (WBN) Unit 2 - Response to Final Safety Analysis Report (FSAR)

Chapter 11 and Final Supplemental Environmental Impact Statement (FSEIS) Request for Additional Information The purpose of this letter is to provide a response to questions received via a handout during a public meeting held on May 11, 2011 in Rockville, Maryland and subsequently via an email received on May 11, 2011 (Reference 1), regarding the review of Unit 2 FSAR, Chapters 11 and12 and the environmental review. This information is being requested as part of the effort to ensure consistency between the FSAR review and environmental review. provides the requested information. Enclosure 2 provides X/Q and D/Q information from the site to a radius of 50 miles. This information will be added to the Unit 2 FSAR in Amendment 104. Enclosure 3 provides the list of commitments.

Should you have any questions, please contact Bill Crouch at (423) 365-2004.

C)Q3c

U.S. Nuclear Regulatory Commission Page 2 May 26, 2011 I declare under penalty of perjury that the foregoing is true and correct. Executed on the 26th day of May, 2011.

Respectfully, David Stinson Watts Bar Unit 2 Vice President

Enclosures:

1. Response to NRC Questions Received during May 11, 2011 Public Meeting Request for Additional Information

2. X/Q and D/Q Information from the Site to a Radius of 50 Miles Attachments to Enclosure 2:

1.

Average Annual X/Q's and D/Q's Out to 50 Miles

2.

Joint Percentage Frequencies of Wind Direction and Wind Speed for Difference Stability Classes

3.

List of Commitments cc (Enclosures):

U. S. Nuclear Regulatory Commission Region II Marquis One Tower 245 Peachtree Center Ave., NE Suite 1200 Atlanta, Georgia 30303-1257 NRC Resident Inspector Unit 2 Watts Bar Nuclear Plant 1260 Nuclear Plant Road Spring City, Tennessee 37381

Enclosure I Response to NRC Questions Received during May 11, 2011 Public Meeting Request For Additional Information Information Required for Staff Analysis for Dose from Gaseous Effluents The staff will be performing dose assessment for dose to the public from gaseous effluents from Watts Bar Nuclear Unit 2 using the NRC developed GASPAR II computer code (Strenge et al. 1986) developed using the approach specified in Regulatory Guide 1.109 (NRC 1977). The following is a list of input values needed to run the computer code. Provide the data, the source of the data and any appropriate assumptions. Refer to RG 1.109 for any questions on the need for the parameter or more detail on what the parameter is.

Please provide answers to the following questions, as well as Tables 1-5.

1. Confirm that there are no milk goat or meat animals are present in the 5-mi radius.

TVA Response Based on the 2007 Land Use Survey (LUS), Watts Bar Nuclear Plant does not have any milk goats within the 5 mile radius.

Beef cattle are assumed to be located at the site boundary for all 16 sectors.

2. Provide the direction and distance for the nearest residence, nearest garden, and nearest milk cow.

TVA Response See Attachment A taken from the 2007 LUS.

3. Confirm that releases are calculated as ground level releases.

TVA Response All releases from Watts Bar Nuclear Plant are considered to be ground releases for dose calculations.

4. Provide nearest site boundary distances for the 16 cardinal compass directions TVA Response See Attachment B for the nearest site boundary for each sector.

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Enclosure I Response to NRC Questions Received during May 11, 2011 Public Meeting Request For Additional Information

5. Provide the estimate of direct radiation doses from sources within the site for each of the 22.5-degree radial sectors centered on the 16 cardinal compass directions for radial distances of 2, 4, 6, 8, 10, 20, 40, 60, and 80kkm (1.2, 2.5, 3.7, 5, 6.2, 12, 25, 27, and 50 mi) from the reactor.

TVA Response See Attachment C taken from the 2007 Environmental Dosimetry Data at distances monitored at WBN. The most distant point routinely monitored is 15 miles from the plant. The data indicates that dose at the monitored locations is essentially the same irrespective of distance and direction. These readings appear to be indicative of offsite doses from direct radiation that are so low as to be indistinguishable from normal background radiation.

6. Confirm that there are no unusual animals, plants, agricultural practices, game harvests, or food processing operations having the potential to contribute 10 percent or more to either individual or population doses in areas affected by liquid effluents, and food-processing operations involving large quantities of water.

TVA Response Based on the 2007 Land Use Survey, Watts Bar does not have any unusual animals, plants, agricultural practices, game harvests that would contribute 10% or more to either the individual or population doses in areas affected by liquid or gaseous pathways and no food processing operations involving large quantities of water.

7. Identify and provide a reference for direct radiation sources within or onsite out-of-plant as solid waste (e.g., independent fuel storage).

TVA Response Outside Radwaste Storage Operational considerations make it necessary to temporarily store containers of radioactive materials and radioactive wastes in designated areas such as the concrete pad in the east yard outside of the Condensate Demineralizer Waste Evaporator (CDWE). Drums, boxes, and liners of radioactive materials or wastes including Dry Active Waste (DAW) may be stored in outside storage areas after being packaged for shipment or storage. Liners of dewatered resin (that have been processed for imminent shipment offsite) are stored the same as other containers. The outside storage area provides sufficient storage to accommodate one full shipment of DAW or radioactive materials. The concrete pad east of the CDWE will also be used to temporarily store (less than 5 years) DAW. Watts Bar does not have an independent wet or dry fuel storage facility.

Monitoring in the immediate vicinity of this storage shows dose rates that range from 81 to 180 mrem/year. The monitored values vary substantially throughout the year depending on the quantity of material being stored. Other monitored E1-2

Enclosure I Response to NRC Questions Received during May 11, 2011 Public Meeting Request For Additional Information locations on the site do not appear to vary based on the dose rate from the Radwaste Storage area.

Old Steam Generator Storage Facility (OSGSF)

The OSGSF is a non-safety related, non-seismic reinforced concrete structure that provides interim storage for the Old Steam Generators (OSGs) removed from the Reactor Building as a result of steam generator replacement during the Unit 1 Cycle 7 refueling outage. The OSGSF is located north of the plant, outside the protected area but within the exclusion area and site boundary. The reinforced concrete walls and roof (minimum density of 145 lb/ft3) of the OSGSF and its access vestibule have been designed to ensure that the dose rates outside the facility are below station administrative and 10 CFR 20 and 40 CFR 190 limits.

Radiation zones inside the OSGSF were calculated to range from a "radiation area" near the OSGs to "unlimited access" at the vestibule door and "unlimited access" outside the OSGSF. Based on measured radiation levels inside the OSGSF, the interior of the OSGSF is controlled as a radiologically controlled area.

The radiation dose assessment was accomplished using the MCNP (Monte Carlo NParticle) computer code. MCNP is a Monte Carlo program that calculates direct and skyshine doses.

In a manner similar to the Radwaste Storage discussed above, this structure is routinely monitored. The dose rate ranges from 61 to 79 mrem/year. Values in this range are typical of very slightly higher than measured at other locations on site.

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Enclosure I Response to NRC Questions Received during May 11, 2011 Public Meeting Request For Additional Information

8. The following five tables of information were requested:

Table I Item Parameter Units Value Source Assumptions 1

Distance (in miles) from the miles 5

NUREG/CR-4653 Any dummy value >0 site to the northeast corner of in order not to abort the U.S.

GASPAR 2

Fraction of the year that leafy 0.33 WBN LUS Survey 4 out 12 months vegetables are grown 3

Fraction of the year that milk 0.65 2

Value was used for cows are on pasture all three dairy farms 4

Fraction of the maximum 1

WBN ODCM Conservatively individual's vegetable intake assumed that all that is from his own garden food eaten by the average individual is grown within the sector.

5 Fraction of milk-cow feed kg/d 64 2, 6 N/A intake that is from pasture while on pasture.

6 Average absolute humidity g/m3 9

See Attachment D See Attachment D over the growing season 7

Average temperature over the N/A 0

N/A N/A growing season (deg F).

T is used only to calculate absolute humidity.

If T is supplied, H must be supplied as relative humidity

(%). Otherwise set T=0 or blank 8

Fraction of the year that goats N/A N/A N/A No Goats in 5 mile are on pasture.

radius of WBN 9

Fraction of goat-feed intake N/A N/A N/A No Goats in 5 mile that is from pasture while on radius of WBN pasture 10 Fraction of the year that beef N/A 1

2 N/A cattle are on pasture.

11 Fraction of beef-cattle feed kg/d 64 2, 6 N/A intake that is from pasture while the cattle are on pasture.

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Enclosure I Response to NRC Questions Received during May 11, 2011 Public Meeting Request For Additional Information Table I (continued)

Item Parameter Units Value Source Assumptions 12 Consumption factors for milk, Milk (

L/yr) 2 consumption factors meat, leafy vegetables, and Adult 310 for max individual vegetables Teen 400 Child 330 Population doses Infant 330 are determined by Meat (kg/yr) multiplying the Adult 110 average dose for Teen 65 each sector by the Child 41 population in that Infant 0

sector. The average Leafy (kg/yr) population dose is Vegetable then multiplied by Adult 64 the ratio of the Teen 42 average Child 26 consumptions CInfn 26 obtained from RG Infant 0

1.09 Table E-4 Vegetable (kg/yr) divided by the Adult 520 consumption factors Teen 630 for the max Child 520 individuals Infant 0

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Enclosure I Response to NRC Questions Received during May 11, 2011 Public Meeting Request For Additional Information Table 2.

Present Annual Milk Production Sector and Radial Distance Around the WBN2 Site for the Year 2007.

Sectors North North-Northeast Northeast East-Northeast East East-Southeast Southeast South-Southeast South South-Southwest Southwest West-Southwest West West-Northwest Northwest North-Northwest Total Radii/Distances (mi)

Year 0-1 1-2 2-3 3-4 4-5 5-10 10-20 20-30 30-40 40-50 0-50 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 4.17 1.42 2.08 1

1 1

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Enclosure I Response to NRC Questions Received during May 11, 2011 Public Meeting Request For Additional Information Table 3.

Present Annual Meat Production Sector and Radial Distance Around The WBN2 Site for the Year 2007.

RadiilDistances (mi)

Sectors Year 0-1 1-2 2-3 3-4 4-5 5-10 10-20 20-30 30-40 40-50 0-50 North North-Northeast Northeast East-Northeast East East-Southeast Southeast South-Southeast South South-Southwest Southwest West-Southwest West West-Northwest Northwest North-Northwest Total 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 0.96 1.23 0.98 0.85 0.80 0.78 0.78 0.78 0.83 0.96 1.04 0.89 0.91 0.87 0.87 0.91 14 2

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Enclosure I Response to NRC Questions Received during May 11, 2011 Public Meeting Request For Additional Information Table 4.

Present Annual Vegetable Production Sector and Radial Distance around the WBN2 Site for the Year 2007 Radii/Distances (mi)

Sectors Year 0-1 1-2 2-3 3-4 4-5 5-10 10-20 20-30 30-40 40-50 0-50 North 2007 4.76 North-Northeast Northeast East-Northeast East East-Southeast Southeast South-Southeast South South-Southwest Southwest West-Southwest West West-Northwest Northwest North-Northwest Total 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2.08 3.84 3.06 3.96 2.96 2.88 4.63 1.40 1.23 5.03 2.90 3.18 3.67 1.97 2.86 3

5 6

2 E1-8 Response to NRC Questions Received during May 11, 2011 Public Meeting Request For Additional Information Table 5.

Present Annual Leafy Vegetable production Sector and Radial Distance around the WBN2 Site for the Year 2007.

Sectors North North-Northeast Northeast East-Northeast East East-Southeast Southeast South-Southeast South South-Southwest Southwest West-Southwest West West-Northwest Northwest North-Northwest Total Radii/Distances (mi)

Year 0-1 1-2 2-3 3-4 4-5 5-10 10-20 20-30 30-40 40-50 0-50 2007 4.76 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2007 2'.08 3.84 3.06 3.96 2.96 2.88 4.63 1.40 1.23 5.03 2.90 3.18 3.67 1.97 2.86 0

3 5

6 2

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Enclosure I Response to NRC Questions Received during May 11, 2011 Public Meeting Request For Additional Information Information Required for Staff Analysis for Dose from Liquid Effluents The staff will be performing dose assessment for dose to the public from liquid effluents from Watts Bar Nuclear Unit 2 using the NRC developed LADTAP II computer code (Strenge et al. 1986) developed using the approach specified in Regulatory Guide 1.109 (NRC 1977). The following is a list of input values needed to run the computer code. Provide the data, the source of the data and any appropriate assumptions. Refer to RG 1.109 for any questions on the need for the parameter or more detail on what the parameter is. Some supplementary information is provided in Regulatory Guide 1.113 (NRC 1977) to which the licensee is referred.

1. The staff compares their calculations against the applicants. Will TVA be revising the information in the TVA application or will the staffs comparison be against the 2008 application?

TVA Response TVA is using the 2007 LUS and clarified both the liquid and gaseous source terms.

El-10 Response to NRC Questions Received during May 11, 2011 Public Meeting Request For Additional Information

2. Projected population by sector and radial distance around the WBN2 site for the year 2040, including totals for each sector and a total population. See Table below.,

Table 1.

Projected Population by Sector and Radial Distance Around the WBN2 Site for the Year 2040. Population with Projections to the Year 2040 Radii/Distances (mi)

Sectors Year 0-1 1-2 2-3 3-4 4-5 5-10 0_10(a) 10-20 20-30 30-40 40-50 0-50 North 2040 0 18 0

0 135 2465 2619 1885 2778 4798 6172 18222 North-2040 0 0 18 411 185 1536 2150 11762 18766 14502 2547 49727 Northeast Northeast 2040 0 0 18 308 287 827 1441 3783 16734 29838 78334 130130 East-2040 0 0 18 308 287 497 1110 3553 29539 63798 253831 351832 Northeast East 2040 0 8 431 308 616 552 1915 11352 18647 30063 44013 105990 East-2040 0 0 0

27 41 68 135 6230 20120 5068 3280 34833 Southeast Southeast 2040 8 0 0

29 39 135 203 19852 15185 3950 7822 44012 South-2040 21 0

0 246 413 103 783 8951 12907 2918 48593 74151 Southeast South 2040 16 0 0 0 1983 3824 5823 4586 42883 56430 17985 127707 South-2040 0 0 21 0

0 546 567 5725 42517 46281 106392 201482 Southwest Southwest 2040 0 0 0

0 0 1051 1051 12978 14499 62307 111795 202630 West-2040 0 6 36 59 126 711 938 12791 2837 2840 3372 22778 Southwest West 2040 0 14 22 101 90 710 937 3406 5555 2944 5474 18316 West-2040 0 0 22 126 79 490 717 2091 4372 5654 20511 33345 Northwest Northwest 2040 0 108 332 376 526 2655 3998 2889 18634 10462 15956 51940 North-2040 0 0 0 173 123 3116 3413 1536 33843 11609 5890 56290 Northwest Total 45 155 919 2471 4930 19287 27799 113368 299818 353432 728968 1523385 El-11 Response to NRC Questions Received during May 11, 2011 Request For Additional Information Public Meeting Table II.

Item Parameter Units Value Source Assumptions 1

Liquid effluent discharge rate ft3 /s 0.33 FSAR Maximum rate Table of undiluted 11.2-2 radwaste discharge 2

Reconcentration model No model No model 4

Liquid waste is (see Reg Guide 1.113) completely or discharged mixed considered directly into the model/plug-flow a direct cooling tower model/partially release blowdown line mixed model which enters the TN river 3

Effluent discharge rate to ft3/s 44.56+

FSAR Minimum rate receiving body 0.33 =

Section of cooling 44.89 11.2.4 tower blowdown dilution flow +

radwaste W_

discharge rate Total volume of impoundment ft3 N/A N/A N/A 4

Fraction of population who are 0.665 6

N/A adults 5

Fraction of population who are 0.153 6

Fraction of teens population 6

Fraction of population who are 0.168 6

Fraction of children population 7

Liquid effluent source term by (Ci/yr)

See 7

N/A radionuclide Attachment E

8 9

Shore width factor (see Reg none 0.2 2

N/A Guide 1.109) 1 Include items 10-14 or items 15-20 10 Dilution factor for aquatic food See 1, 8 See pathways and external Attachment Attachment F exposure while boating F

11 Dilution factor for shoreline See 1, 8 See and swimming exposure Attachment Attachment F F

12 Dilution factor for drinking See 1, 8 See water pathway Attachment Attachment G G

13 Transit time from discharge to h

0 N/A For exposure location for all conservatism 0 pathways except drinking was assumed water 14 Transit time from discharge to h

0 N/A For drinking water supply conservatism 0 was assumed El-12

Enclosure I Response to NRC Questions Received during May 11, 2011 Public Meeting Request For Additional Information Table II.

Item Parameter Units Value Source Assumptions Include Items 15-20 if no value was given for items 10-12. Include one set of items 15-20 for each dilution factor (Items 10-12) not provided above.

15 Surface water model 16 Average flow velocity Ft/s N/A N/A N/A 17 Average depth of water body ft N/A N/A N/A 18 Downshore distance from ft.

N/A N/A N/A discharge point to usage location 19 Offshore, distance to water ft.

N/A N/A N/A usage location 20 Width of river or depth of ft.

N/A N/A N/A discharge point in lake 21 Consumption and usage Shoreline usage Max. individual factors for adults, teens, (hr/yr) children, and infants (adult) 500 Shoreline (teen) 500 conservatism is (child) 500 based on the (infant) 500 max individual visits the Water usage 2

shoreline for 10 (L/yr) hours per week (adult) 730 for 50 weeks (teen) 510 per year (child) 510 (infant) 330 Population Fish usage are the consumption 2

same as RG (kg/yr) 1.109 except (adult) 21 shoreline is 5 (teen) 16 hr per visits per (child) 6.9 year at each (infant) 0.0 reach For Each Sport Fishing Usage Location N/A 22 Surface water model N/A N/A N/A 23 Average flow velocity Ft/s N/A N/A N/A 24 Average depth of water body ft N/A N/A N/A 25 Downshore distance from ft.

N/A N/A N/A discharge point to usage location 26 Offshore, distance to water ft.

N/A N/A N/A usage location 27 Width of river or depth of ft.

N/A N/A N/A discharge point in lake Sport Fish harvest - Provide a separate dataset for each location 28 Identification mi downstream 18 N/A Usage location is considered from 528 to E1-13

Enclosure I Response to NRC Questions Received during May 11, 2011 Request For Additional Information Public Meeting Table II.

Item Parameter Units Value Source Assumptions 510 TRM downstream (4799 acres) 29 Fish Harvest Kg/yr 662 5

3.04 lb/acre/yr 30 Dilution See 1,8 See Attachment Attachment F F

31 Transit time h

0 N/A For conservatism 0 was assumed Commercial fish harvest - provide a separate dataset for each location WBN does not have commercial fishing.

32 identification N/A N/A N/A 33 Fish Harvest Kg/yr N/A N/A N/A 34 Dilution N/A N/A N/A 35 Transit time h

N/A N/A N/A Sport invertebrate harvest - provide a separate dataset for each location WBN ODCM does not consider invertebrates.

36 identification N/A N/A N/A 37 invertibrate Harvest Kg/yr N/A N/A N/A 38 Dilution N/A N/A N/A 39 Transit time h

N/A N/A N/A Commercial invertebrate harvest - provide a separate dataset for each WBN ODCM location does not consider invertebrates.

40, identification N/A N/A N/A 41 '

invertibrate Harvest Kg/yr N/A N/A N/A 42, Dilution N/A N/A N/A 43 Transit time h

N/A N/A N/A Population shoreline - provide a separate dataset for each location 44 Identification N/A See N/A N/A Attachment F

45!

Dilution See 1,8 See Attachment Attachment F F

46 Transit time hr 0

For conservatism 0 was assumed 47 Usage (person-hours) hr See WBN Population Attachment ODCM usage for F

shoreline is 5 E1-14 Response to NRC Questions Received during May 11, 2011 Public Meeting Request For Additional Information Table II.

Item Parameter Units Value Source Assumptions hr per visits per year at each reach 48 Shorewidth factor 0.2 2

N/A Population swimming - provide a separate dataset for each location WBN ODCM does not consider swimming.

49 Identification N/A N/A N/A 50 Total Exposure time for hr/y N/A N/A N/A swimming for the current usage location 51 Dilution Factor for the current N/A N/A N/A swimming location 52 Transit time from the release hr N/A N/A N/A point to the current usage location Population Boating - provide a separate dataset for each location WBN ODCM does not consider boating.

53 Identification N/A N/A N/A 54 Total Exposure time for hr/y N/A N/A N/A boating for the current usage location 55 Dilution Factor for the current N/A N/A N/A swimming location 56 Transit time from the release hr N/A N/A N/A point to the current usage location Population drinking water - provide a separate dataset for each location 57:

Supplier Identification N/A Attachment i

G 58 Total population supplied by N/A Attachment the current drinking water G

location 59' Dilution factor for current See 1,8 See usage location intake Attachment Attachment G G

601 Transit time from discharge hr 0

For point (to receiving water body) conservatism 0 was assumed 61 Supply rate of drinking water Gal/d N/A N/A pop not = 0 for current water plant. (used only if pop = 0) 62 Ave. rate of water usage by Gal/d N/A N/A pop not = 0 individuals for the current water-plant service area (used El-15 Response to NRC Questions Received during May 11, 2011 Request For Additional Information Public Meeting Table II.

Item Parameter Units Value Source Assumptions only if pop = 0) 63 Surface water model N/A N/A N/A 64 Average flow velocity Ft/s N/A N/A N/A 65 Average depth of water body Ft N/A N/A N/A 66 Downshore distance from ft.

N/A N/A N/A discharge point to usage location 67 Offshore, distance to water ft.

N/A N/A N/A usage location 68 Width of river or depth of ft.

N/A N/A N/A discharge point in lake Irrigated foods: include a separate dataset for each irrigated food. If there No irrigation are no irrigated foods these items may be omitted pathway at WBN 69 Food type Vegetation/leafy N/A N/A N/A vegetation/milk/

meat 70 Irrigation rate L.m-2.mo 1 N/A N/A N/A 71 Fr. of animal feed not N/A N/A N/A produced with contaminated irrigation water 72 Fr. of animal drinking water N/A N/A N/A not obtained from contaminated irrigation water supply.

731 Total production of food Kg/y or L/y N/A N/A N/A product within 50 miles of the site 741 Growing period for current D

N/A N/A N/A food product 75' Crop yield for current food Kg/M 2 N/A N/A N/A product 76 Rate of consumption by Kg/y N/A N/A N/A maximally exposed adult 77 Rate of consumption by Kg/y N/A N/A N/A maximally exposed teen 78 Rate of consumption by Kg/y N/A N/A N/A maximally exposed child 79 Average rate of consumption Kg/y N/A N/A N/A by an adult in local population 80 Average rate of consumption Kg/y N/A N/A N/A by a teen in local population 81 Average rate of consumption Kg/y N/A N/A N/A by a child in local population 82 Holdup time between harvest Hr N/A N/A N/A and consumption by average,

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Enclosure I Response to NRC Questions Received during May 11, 2011 Request For Additional Information Public Meeting Table II.

Item Parameter Units Value Source Assumptions members of population 83 Holdup time between harvest Hr N/A N/A N/A and consumption by maximally exposed members of population 84 Dilution Factor for irrigation N/A N/A N/A water usage location for the current food product 85 Production rate for the current Kg/y N/A N/A N/A food product using current or irrigation water supply L/y 86 Transit time from the release Hr N/A N/A N/A point to the current usage location Items 88-93 (only if dilution N/A N/A N/A factors not given above) 88 Surface water model N/A N/A N/A 89 Average flow velocity Ft/s N/A N/A N/A 90 Average depth of water body Ft N/A N/A N/A 91 Downshore distance from ft.

N/A N/A N/A discharge point to usage location 92 Offshore, distance to water ft.

N/A N/A N/A usage location 93 Width of river or depth of ft.

N/A N/A N/A discharge point in lake Biota Exposure Location Data: The following data are for calculation of WBN does not dose to biota consider Biota 94 Location identifier N/A N/A N/A 95 i Dilution Factor for current N/A N/A N/A exposure location for biota 96 Transit time from the effluent hr N/A N/A N/A release location to current exposure location Include items97-102 following only if no dilution factor was given for biota WBN does not consider Biota 97f Surface water model N/A N/A N/A 98!

Average flow velocity Ft/s N/A N/A N/A 99 ý Average depth of water body Ft N/A N/A N/A 100 Downshore distance from ft.

N/A N/A N/A discharge point to usage location 101 Offshore, distance to water ft.

N/A N/A N/A usage location 102 Width of river or depth of ft.

N/A N/A N/A discharge point in lake El-17

Enclosure I Response to Questions Received during May 11, 2011 Public Meeting Request For Additional Information Attachment A - 2007 LUS Distance Chi/Q D/Q Terrain Milk Sector (Meters)

(s/m3)

(I/m 2)

Adjustment Feeding Factor Factor Nearest Resident N

2134 2.84e-06 4.21e-09 1.50 Nearest Resident NNE 3600 2.69e-06 4.41e-09 1.80 Nearest Resident NE 3353 3.84e-06 3.22e-09 2.20 Nearest Resident ENE 2414 6.26e-06 3.83e-09 1.90 Nearest Resident E

3268 3.97e-06 2.14e-09 1.70 Nearest Resident ESE 4416 2.64e-06 1.46e-09 1.90 Nearest Resident SE 1372 9.66e-06 8.16e-09 1.50 Nearest Resident SSE 1524 4.18e-06 5.56e-09 1.40 Nearest Resident S

1585 3.91e-06 8.42e-09 1.80 Nearest Resident SSW 1979 2.76e-06 6.64e-09 1.90 Nearest Resident SW 4230 1.1 5e-06 1.43e-09 2.00 Nearest Resident WSW 1829 3.61 e-06 4.03e-09 1.70 Nearest Resident W

2896 7.30e-07 6.01e-10 1.10 Nearest Resident WNW 1646 2.26e-06 2.12e-09 2.90 Nearest Resident NW 2061 1.03e-06 9.95e-10 1.50 Nearest Resident NNW 4389 3.50e-07 2.97e-10 1.00 Nearest Garden N

7664 3.13e-07 3.00e-10 1.00 Nearest Garden NNE 6173 1.06e-06 1.42e-09 1.50 Nearest Garden NE 3353 3.84e-06 3.22e-09 2.20 Nearest Garden ENE 4927 2.01e-06 9.39e-10 1.60 Nearest Garden E

6372 1.35e-06 5.42e-10 1.40 Nearest Garden ESE 4758 2.26e-06 1.21e-09 1.80 I Nearest Garden SE 4633 1.58e-06 8.97e-10 1.30 Nearest Garden SSE 7454 3.73e-07 2.80e-10 1.10 Nearest Garden S

2254 2.50e-06 4.94e-09 1.90 Nearest Garden SSW 1979 2.76e-06 6.64e-09 1.90 I Nearest Garden SW 8100 4.28e-07 4.03e-10 1.80 Nearest Garden WSW 4667 8.70e-07 7.11e-10 1.50 Nearest Garden W

5120 3.03e-07 2.03e-10 1.00 Nearest Garden WNW 5909 1.72e-07 1.05e-10 1.30 Nearest Garden NW 3170 4.13e-07 3.50e-10 1.10 Nearest Garden NNW 4602 3.28e-07 2.74e-10 1.00 Milk Cow ESE 6706 1.35e-06 6.18e-10 1.70 0.65 Milk Cow SSW 2286 2.24e-06 5.20e-09 1.90 0.65 Milk Cow SSW 3353 1.36e-06 2.84e-09 2.00 0.65 El-18 Response to Questions Received during May 11, 2011 Public Meeting Request For Additional Information Attachment B - Nearest Sector for Site Boundary Terrain S etr Distance Chi/Q D/Q A

ector (Meters)

(sIm3)

(1/Mr2)

Adjustment Factor Unrestricted Area Boundary N

1550 5.12e-06 8.13e-09 1.70 Unrestricted Area Boundary NNE 1980 6.35e-06 1.23e-08 1.80 Unrestricted Area Boundary NE 1580 1.05e-05 1.10e-08 2.10 Unrestricted Area Boundary ENE 1370 1.23e-05 8.77e-09 1.70 Unrestricted Area Boundary E

1280 1.37e-05 9.66e-09 1.60 Unrestricted Area Boundary ESE 1250 1.43e-05 1.16e-08 1.80 Unrestricted Area Boundary SE 1250 1.11 e-05 9.49e-09 1.50 Unrestricted Area Boundary SSE 1250 6.04e-06 8.21e-09 1.50 Unrestricted Area Boundary S

1340 5.33e-06 1.1 7-e08 1.90 Unrestricted Area Boundary SSW 1550 4.14e-06 1.05e-08 2.00 Unrestricted Area Boundary SW 1670 4.46e-06 7.34e-09 2.10 Unrestricted Area Boundary WSW 1430 5.47e-06 6.37e-09 1.80 Unrestricted Area Boundary W

1460 2.1 le-06 2.07e-09 1.20 Unrestricted Area Boundary WNW 1400 2.49e-06 2.38e-09 2.50 Unrestricted Area Boundary NW 1400 2.05e-06 2.13e-09 1.70 Unrestricted Area Boundary, NNW 1460 2.68e-06 3.08e-09 1.60 El-19 Response to Questions Received during May 11, 2011 Public Meeting Request For Additional Information Attachment C - 2007 Land Use Survey Environmental Dosimetry Data TLD Approx 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Annual Station Direction Distance 2007 2007 2007

.2007 Exposure Number degrees miles mR/year mR/year mR/year mR/year mR/year N-I 10 1.2 15.7 16.8 12.1 16.1 60.7 N-2 350 4.7 15.8 12.1 13.5 11.2 52.6 NNE-1 21 1.2 15.7 9.3 14.4 15 54.4 NNE-1A 22 1.9 15 8.8 8.4 10.1 42.3 NNE-2 20 4.1 15.3 11.6 10.2 12.9 50 NNE-3 17 10.4 15.7 12.1 7.9 8.5 44.2 NE-1 39 0.9 15.7 12.6 13.5 12.3 54.1 NE-2 54 2.9 15.3 9.8 13 12.3 50.4 NE-3 47 6.1 15.2 6.9 10.2 9.6 41.9 ENE-1 74 0.7 15.7 9.8 14 11.2 50.7 ENE-2 69 5.8 15.3 11.6 12.1 11.8 50.8 ENE-2A 69 3.5 15.2 7.4 8.4 9.6 40.6 ENE-3 56 7.6 15.5 8.8 12.6 9

45.9 E-I 85 1.3 15.5 14

-1 13.9 57.9 E-2 92 5

15.6 14.9 17.7 14.5 62.7 E-3 90 15 15.4 12.6 17.2 14.5 59.7 ESE-1 109 1.2 14.8 8.3 8.8 8

39.9 ESE-2 106 4.4 15.8 14.9 17.7 14.5 62.9 SE-1A 138 0.9 15.1 10.2 9.8 8.5 43.6 SE-2 128 5.3 15.5 10.2 10.7 11.2 47.6 SE-2A 144 3.1 15.2 12.6 10.2 10.7 48.7 SSE-1 146 0.6 15.1 13.1 8.4 11.2 47.8 SSE-1A 161 0.6 15.6 10.2 12.1 12.3 50.2 SSE-2 156 5.8 15.6 10.7 14.9 15.6 56.8 S-1 182 0.7 15.6 9.3 9.3 8.5 42.7 S-2 185 4.8 15.3 8.8 5.1 9.6 38.8 S-2A 177 2

15.3 12.1 13.5 12.9 53.8 S-3 185 6.2 15.2 10.2 10.7 8.5 44.6 SSW-1 199 0.8 15.6 15.9 16.3 16.7 64.5 SSW-2 200 1.3 15.1 9.3 12.6 11.8 48.8 SSW-3 199 5

15.3 10.2 9.8 9.6 44.9 SW-I 226 0.8 15.6 16.8 12.6 18.8 63.8 SW-2 220 5.3 15.3 10.2 11.2 13.4 50.1 SW-3 225 15 15.2 9.3 10.2 10.1 44.8 WSW-1 255 0.9 15.6 10.2 11.2 15 52 WSW-2 247 4

15.2 13.1 13.5 16.1 57.9 W-1 270 0.9 15.6 13.5 13 8.5 50.6 E1-20

Enclosure I Response to Questions Received during May 11, 2011 Public Meeting Request For Additional Information Attachment C - 2007 Land Use Survey Environmental Dosimetry Data (continued)

TLD Approx 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Annual Station Direction Distance 2007 2007 2007 2007 Exposure Number degrees miles mR/year mR/year mR/year mR/year mR/year W-2 277 4.8 15.3 10.2 8.8 9

43.3 W-2A 268 3.2 15.4 10.7 11.2 8

45.3 WNW-1 294 0.9 15.9 19.2 19.6 15 69.7 WNW-2 292 4.9 15.5 16.3 18.2 17.2 67.2 NW-1 320 1.1 15.8 11.6 12.1 13.9 53.4 NW-2 313 4.7 15.5 12.6 15.8 13.4 57.3 NW-2A 321 3

15.7 7.9 11.6 6.3 41.5 NW-3 317 7

15.6 13.1 14.4 15 58.1 NNW-1 340 1

15.6 12.1 9.8 12.3 49.8 NNW-2 333 4.5 15.7 11.2 12.1 10.1 49.1 NNW-3 329 7

15.6 7.9 7.9 7.4 38.8 NNW-4 337 15 15.6 9.8 8.8 8.5 42.7 E1-21

Enclosure I Response to Questions Received during May 11, 2011 Public Meeting Request For Additional Information Attachment D Absolute Humidity TVA's Offsite Dose Calculation manuals include absolute humidity in the denominators of equations for ingestion dose factors. An estimated value of 9 grams per cubic meter is used based on the calculations performed for Browns Ferry and Sequoyah. The methodology used to determine the absolute humidity is examined in the following study.

Absolute humidity (H) is "the ratio of the mass of water vapor present to the volume occupied by the mixture: that is the density of the water vapor component." (Glossary of Meteorology) Absolute humidity is not directly measured, but must be calculated from those variables which are measured by TVA. TVA measures the temperature (T) and dewpoint (Td) at 10m at each nuclear plant. In the 1970's and early 1980's TVA also measured the barometric pressure.

E1-22

Enclosure I Response to Questions Received during May 11, 2011 Public Meeting Request For Additional Information Attachment E Liquid Effluent Source Term Total LRW SGB Released Nuclide Ci Ci Ci Br-84 1.65E-04 5.23E-04 6.88E-04 1-131 2.63E-02 1.14E+00 1.16E+00 1-132 1.32E-02 1.08E-01 1.21 E-01 1-133 5.29E-02 8.57E-01 9.10E-01 1-134 6.26E-03 2.65E-02 3.28E-02 1-135 4.75E-02 4.22E-01 4.70E-01 Rb-88 6.89E-03 7.84E-04 7.68E-03 Cs-134 2.93E-02 1.68E-01 1.98E-01 Cs-136 2.55E-03 1.72E-02 1.98E-02 Cs-137 4.03E-02 2.21 E-01 2.61 E-01 Na-24 1.86E-02 O.OOE+00 1.86E-02 Cr-51 7.03E-03 9.27E-02 9.98E-02 Mn-54 4.99E-03 5.1OE-02 5.59E-02 Fe-55 8.09E-03 0.OOE+00 8.09E-03 Fe-59 2.42E-03 9.05E-03 1.15E-02 Co-58 2.20E-02 1.44E-01 1.66E-01 Co-60 1.44E-02 1.72E-02 3.16E-02 Zn-65 3.82E-04 O.OO E+00 3.82E-04 Sr-89 1.92E-04 4.33E-03 4.52E-03 Sr-90 2.20E-05 3.88E-04 4.1OE-04 Sr-91 2.84E-04 2.18E-03 2.47E-03 Y-91 M 1.68E-04 O.OOE+00 1.68E-04 Y-91 9.OOE-05 3.OOE-04 3.90E-04 Y-93 1.27E-03 0.OOE+00 1.27E-03 Zr-95 1.39E-03 1.20E-02 1.34E-02 Nb-95 2.1 OE-03 8.98E-03 1.11 E-02 Mo-99 4.20E-03 9.95E-02 1.04E-01 Tc-99m 3.35E-03 0.OOE+00 3.35E-03 Ru-103 5.88E-03 0.OOE+00 5.88E-03 Ru-106 7.63E-02 0.OOE+00 7.63E-02 Te-129m 1.41E-04 0.OOE+00 1.41E-04 Te-129 7.30E-04 0.OOE+00 7.30E-04 Te-131m 8.05E-04 0.OOE+00 8.05E-04 Te-131 2.03E-04 0.OOE+00 2.03E-04 Te-132 1.11E-03 2.93E-02 3.05E-02 Ba-140 1.02E-02 3.48E-01 3.58E-01 La-140 1.62E-02 4.98E-01 5.14E-01 Ce-141 3.41 E-04 0.OOE+00 3.41 E-04 Ce-143 1.53E-03 0.OOE+00 1.53E-03 Ce-144 6.84E-03 1.26E-01 1.33E-01 Np-239 1.37E-03 0.OOE+00 1.37E-03 H-3 1.25E+03 0.OOE+00 1.25E+03 Unplanned 1.60E-01 0.OOE+00 1.60E-01 El-23

Enclosure I Response to Questions Received during May 11, 2011 Public Meeting Request For Additional Information Attachment E Liquid Effluent Source Term Total LRW SGB Released Nuclide Ci Ci Ci Totals w/o H-3 4.4020E+00 4.8400E+00 Total w/unplanned 5.OOOOE+00 Totals w H-3 1.2576E+03 Total w/unplanned 1.2578E+03 E1-24

Enclosure I Response to Questions Received during May 11, 2011 Public Meeting Request For Additional Information Attachment F Shoreline Data For WBN, the dilution factor (Mp/F) is replaced by the near field dilution factor (DNF) as described below; DNF = 1/0.1 RF (for receptors upstream of TRM 510.0)

DNF = 1/RF (for receptors downstream of TRM 510.0) where: RF = 28,000 cfs 0.1 = the fraction of river flow available for dilution in the near field TRM 510 is the point at which the effluent is considered to be fully mixed with the river flow.

Estimated Estimated 2040 2040 Size Recreation Recreation (usage Beginning Ending person Name TRM TRM (acres)

(visits/year) hours)

Chickamauga Reservoir (from WBN to 100 percent mixing point) 528 510 4799 120,986 6.0E5 Chickamauga Reservoir (from 100 percent mixing point to 6.5E6 SQN) 510 484 22101 1,297,880 Chickamauga Reservoir (from SQN to Chickamauga Dam) 484 471 9889 7,421,905 3.7E7 Nickajack Reservoir (from Chickamauga Dam to WBN 50-mile 1.4E6 radius) 471 460 1799 284,000 El-25

Enclosure I Response to Questions Received during May 11, 2011 Public Meeting Request For Additional Information Attachment G Public Water Supply Data For WBN, the dilution factor (Mp/F) is replaced by the near field dilution factor (DNF) as described below; DNF = 1/0.1 RF (for receptors upstream of TRM 510.0)

DNF = 1/RF (for receptors downstream of TRM 510.0) where: RF = 28,000 cfs 0.1 = the fraction of river flow available for dilution in the near field TRM 510 is the point at which the effluent is considered to be fully mixed with the river flow.

Name TRM Estimated 2040 Population Dayton, Tenn.

504 19,170 Soddy-Daisy/Falling Water Utility District 487 11,452 East Side Utility, Tenn.

473 49,700 Chattanooga, Tenn.

465 237,048 E1-26

Enclosure I Response to Questions Received during May 11, 2011 Public Meeting Request For Additional Information Sources

1. NUREG-0133, "Preparation of Radiological Effluent Technical Specifications for Nuclear Power Plants," September 1978.

2. Regulatory Guide 1.109, "Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10 CFR Part 50, Appendix I," Revision 1, October 1977.

3. Regulatory Guide 1.111, "Methods for Estimating Atmospheric Transport and Dispersion of Gaseous Effluents in Routine Releases from Light-Water-Cooled Reactors," Revision 1, July 1977.

4. Regulatory Guide 1.113, "Estimating Aquatic Dispersion of Effluents from Accidental and Routine Reactor Releases for the Purpose of Implementing 10 CFR Part 50 Appendix I," Revision 11 April 1977.

5. TVA Memorandum, Edwin M. Scott to Betsy Eiford-Lee, "Fish Harvest Estimates for the Revision of the QWATA Computer Code," December 15, 1987.

6. NUREG/CR-1004, "A Statistical Analysis of Selected Parameters for Predicting Food Chain Transport and Internal Dose of Radionuclides," October 1979.

7. NUREG-0017 R1 "Calculation of Releases of Radioactive Materials in Gaseous and Liquid Effluents from Pressurized Water Reactors."

8. TVA Memorandum, E. E. Driver to R. B. Maxwell, "Watts Bar Nuclear Plant Dispersion," December 3, 1984.

E1-27 X/Q and D/Q Information From the Site to a Radius of 50 Miles. provides a table of the X/Q and D/Q data for each of the 16 cardinal compass points out to 50 miles. Attachment 2 provides tables of the joint frequency distributions to be used in conjunction with the Attachment 1 data. The information provided is used for the determination of doses to the public in both the FSAR Chapter 11 routine releases and in the values provided in the Final Supplemental Environmental Impact Statement. The methodology used to develop this information was described in Reference 2.

E2-1 Average Annual X/Q's and D/Q's Out to 50 Miles X/Q's Sector 1305 (m) 2414 (m) 4023 (m) 5633 (m) 7242 (m) 12070 (m) 24140 (m) 40234 (m) 56327 (m) 72420 (m)

N 3.92E-06 1.59E-06 7.65E-07 4.78E-07 3.39E-07 1.68E-07 6.69E-08 3.42E-08 2.22E-08 1.61E-08 NNE 6.54E-06 2.65E-06 1.28E-06 7.99E-07 5.65E-07 2.81E-07 1.12E-07 5.72E-08 3.71E-08 2.69E-08 NE 6.66E-06 2.76E-06 1.36E-06 8.61E-07 6.14E-07 3.10E-07 1.25E-07 6.47E-08 4.22E-08 3.07E-08 ENE 7.79E-06 3.29E-06 1.65E-06 1.05E-06 7.58E-07 3.87E-07 1.58E-07 8.23E-08 5.39E-08 3.94E-08 E

8.32E-06 3.53E-06 1.77E-06 1.13E-06 8.14E-07 4.16E-07 1.70E-07 8.87E-08 5.81E-08 4.28E-08 ESE 7.45E-06 3.15E-06 1.57E-06 1.00E-06 7.19E-07 3.67E-07 1.49E-07 7.79E-08 5.10E-08 3.73E-08 SE 6.94E-06 2.94E-06 1.47E-06 9.38E-07 6.73E-07 3.43E-07 1.40E-07 7.30E-08 4.78E-08 3.50E-08 SSE 3.77E-06 1.57E-06 7.78E-07 4.93E-07 3.52E-07 1.78E-07 7.20E-08 3.73E-08 2.44E-08 1.77E-08 S

2.92E-06 1.19E-06 5.77E-07 3.61E-07 2.56E-07 1.28E-07 5.08E-08 2.60E-08 1.69E-08 1.22E-08 SSW 2.70E-06 1.09E-06 5.26E-07 3.29E-07 2.33E-07 1.16E-07 4.57E-08 2.34E-08 1.51E-08 1.09E-08 SW 3.09E-06 1.26E-06 6.17E-07 3.89E-07 2.77E-07 1.39E-07 5.55E-08 2.86E-08 1.86E-08 1.35E-08 WSW 3.50E-06 1.45E-06 7.12E-07 4.50E-07 3.21E-07 1.62E-07 6.52E-08 3.37E-08 2.20E-08 1.60E-08 W

2.09E-06 8.59E-07 4.22E-07 2.67E-07 1.90E-07 9.56E-08 3.85E-08 1.99E-08 1.29E-08 9.40E-09 WNW 1.11E-06 4.56E-07 2.24E-07 1.41E-07 1.01E-07 5.05E-08 2.03E-08 1.05E-08 6.81E-09 4.95E-09 NW 1.34E-06 5.51E-07 2.70E-07 1.70E-07 1.21E-07 6.10E-08 2.45E-08 1.26E-08 8.20E-09 5.96E-09 NNW 1.99E-06 8.12E-07 3.95E-07 2.48E-07 1.76E-07 8.82E-08 3.52E-08 1.81E-08 1.18E-08 8.52E-09 D/Q's Sector 1305 (m) 2414 (m) 4023 (m) 5633 (m) 7242 (m) 12070 (m) 24140 (m) 40234 (m) 56327 (m) 72420 (m)

N 6.32E-09 2.28E-09 9.45E-10 5.22E-10 3.32E-10 1.37E-10 4.18E-11 1.71E-11 9.24E-12 5.61E-12 NNE 1.35E-08 4.87E-09 2.02E-09

1. 12E-09 7.1 E-10 2.92E-10 8.94E-1 1 3.65E-1 1 1.98E-1 1 1.20E-II NE 7.13E-09 2.57E-09 1.07E-09 5.89E-10 3.74E-10 1.54E-10 4.72E-11 1.92E-11 1.04E-11 6.33E-12 ENE 5.58E-09 2.01E-09 8.35E-10 4.61E-10 2.93E-10 1.21E-10 3.70E-11 1.51E-11 8.17E-12 4.96E-12 E

5.85E-09 2.11E-09 8.76E-10 4.84E-10 3.08E-10 1.27E-10 3.88E-11 1.58E-11 8.57E-12 5.20E-12 ESE 6.02E-09 2.17E-09 9.01E-10 4.98E-10 3.17E-10 1.30E-10 3.99E-11 1.63E-11 8.82E-12 5.35E-12 SE 5.90E-09 2.13E-09 8.82E-10 4.87E-10 3.1OE-10 1.28E-10 3.91E-11 1.59E-11 8.63E-12 5.24E-12 SSE 5.11E-09 1.84E-09 7.64E-10 4.22E-10 2.68E-10 1.10E-10 3.38E-11 1.38E-11 7.47E-12 4.54E-12 S

6.41E-09 2.31E-09 9.59E-10 5.29E-10 3.37E-10 1.39E-10 4.24E-11 1.73E-11 9.38E-12 5.69E-12 SSW 6.91E-09 2.49E-09 1.03E-09 5.71E-10 3.63E-10 1.50E-10 4.58E-11 1.87E-11 1LO.E-1I 6.14E-12 SW 5.21E-09 1.88E-09 7.80E-10 4.31E-10 2.74E-10 1.13E-10 3.45E-11 1.41E-11 7.63E-12 4.63E-12 WSW 4.1OE-09 1.48E-09 6.14E-10 3.39E-10 2.16E-10 8.88E-11 2.72E-11 1.11E-11 6.01E-12 3.65E-12 W

2.07E-09 7.45E-10 3.09E-10 1.71E-10 1.09E-11 4.47E-11 1.37E-11 5.58E-12 3.02E-12 1.83E-12 WNW 1.06E-09 3.84E-10 1.59E-10 8.79E-11 5.59E-11 2.30E-11 7.05E-12 2.87E-12 1.56E-12 9.46E-13 NW 1.41E-09 5.07E-10 2.10E-10 1.16E-10 7.39E-11 3.04E-11 9.31E-12 3.87E-12 2.06E-12 1.25E-12 NNW 2.31E-09 8.34E-10 3.46E-10 1.91E-10 1.21E-10 5.O0E-I I 1.53E-11 6.24E-12 3.38E-12 2.05E-12 E2-A1-1 Joint Percentage Frequencies of Wind Direction and Wind Speed for Difference Stability Classes STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

Watts Bar Nuclear Plant JAN 1, 1986 -

DEC 31, 2005 WIND SPEED (MPH)

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

>=24.5 TOTAL WIND DIRECTION N-NNE NE ENE E

ESE SE SSE SSSW SW WSW W

WNW NW NNW 1.551 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.051 0.001 0.000 0.000 0.000 0.000 0,001 0.000 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.011 0.021 0.034 0.039 0.037 0.017 0.026 0.049 0.070 0.063 0.029 0.007 0.006 0.004 0.004 0.009

0. 052 0.084 0.100 0.076 0.040 0.023 0.027 0.063 0.180 0.371 0.146 0.020 0.007 0.010 0.007 0.021 0.079 0.124 0.080 0.045 0.010 0.002 0.005 0.015 0.142 0.594 0.148 0.018 0.029 0.011 0.019 0.038 0.095 0.181 0.094 0.017 0.004 0.001 0.004 0.011 0.121 0.700 0.065 0.040 0.059 0.064 0.052 0.081 0.005 0.007 0.000 0.000 0.000 0.000 0.000 0.001 0.020 0.049 0.002 0.006 0.007 0.005 0.005 0.012 0.000 0.000 0.010 0.000 0.000 0.000 0.000 0.000 0.001 0.001 0.000 0.000 0.000 0.000 0.0O0 0.0O0 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.244 0.418 0.308 0.175 0.092 0.042 0.064 0.140 0.535 1.778 0.390 0.091 0.108 0.093 0.087 0.161 SUBTOTAL 0.001 0.005 0.426 1.226 1,359 1.589 0.119 0.001 0,000 4.725 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS A TOTAL TOTAL TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS HOURS CALM 170639 8030 7945 168144 1

METEOROLOGICAL FACILITY:

Watts Bar Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 6.72 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A2-1 Joint Percentage Frequencies of Wind Direction and Wind Speed for Difference Stability Classes STABILITY CLASS B

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

Watts Bar Nuclear Plant JAN 1, 1986 -

DEC 31, 2005 WIND SPEED (MPH)

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

>=24.5 TOTAL WIND DIRECTION N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.O00 0.O00 0.O00 0.000 0.000 0.000 0.000 0.001 0.000 0.001 0.001 0.002 0.000 0.000 0.001 0.001 0.000 0.000 0.000 0.001 0.000 0.000 0.027 0.039 0.081 0.058 0.046 0.026 0.039 0.057 0.077 0.082 0.036 0.007 0.006 0.005 0.007 0.011 0.092 0.155 0.147 0.096 0.052 0.022 0.032 0.035 0.146 0.322 0.169 0.037 0.011 0.014 0.015 0.034 0.084 0.147 0.090 0.043 0.004 0.000 0.005 0.008 0.075 0.266 0.054 0.015 0.025 0.031 0.033 0.040 0.109 0.212 0.077 0.010 0.002 0.000 0.002 0.004 0.039 0.199 0.014 0.021 0.040 0.079 0.071 0.079 0.005 0.009 0.001 0.000 0.000 0.000 0.001 0.000 0.014 0.020 0.001 0.001 0.009 0.007 0.008 0.008 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.318 0.563 0.396 0.208 0.106 0.051 0.078 0.104 0.354 0.890 0.275 0.081 0.091 0.137 0.135 0.173 SUBTOTAL 0.000 0.007 0.606 1.383 0.923 0.958 0.083 0.001 0.000 3.960 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS B TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 170639 6722 6659 168144 0

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

Watts Bar Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 5.98 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A2-2 Joint Percentage Frequencies of Wind Direction and Wind Speed for Difference Stability Classes STABILITY CLASS C

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

Watts Bar Nuclear Plant JAN 1, 1986 -

DEC 31, 2005 WIND SPEED (MPH)

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

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW

>=24.5 TOTAL 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.001 0.003 0.001 0.005 0.003 0.002 0.002 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0.000 0.060 0.111 0.139 0.113 0.080 0.054 0.071 0.080 0.128 0.152 0.080 0.023 0.016 0.013 0.020 0.032 0.141 0.224 0.221 0.127 0.049 0.028 0.033 0.064 0.230 0.423 0.225 0.049 0.027 0.030 0.036 0.059 0.125 0.209 0.117 0.030 0.005 0.002 0.002 0.009 0.085 0.256 0.070 0.026 0.039 0.049 0.043 0.064 0.151 0.260 0.070 0.005 0.002 0.001 0.001 0.004 0.048 0.177 0.011 0.015 0.042 0.111 0.096 0.098 0.007 0.013 0.001 0.001 0.000 0.000 0.000 0.002 0.008 0.019 0.001 0.001 0.004 0.010 0.011 0.011 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 "0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.485 0.817 0.552 0.277 0.140 0.088 0.109 0.161 0.503 1.028 0.387 0.117 0.130 0.214 0.206 0.264 SUBTOTAL 0.000 0.023 1.171 1.968 1.130 1.093 0.089 0.001 0.000 5.476 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS C TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS TOTAL HOURS CALM METEOROLOGICAL FACILITY:

Watts Bar Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 5.57 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A2-3 170639 9309 9207 168144 0

Joint Percentage Frequencies of Wind Direction and Wind Speed for Difference Stability Classes STABILITY CLASS D

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

Watts Bar Nuclear Plant JAN 1, 1986 -

DEC 31, 2005 WIND SPEED (MPH)

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

>=24.5 TOTAL WIND DIRECTION N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW 0.006 0.006 0.007 0.008 0.005 0.003 0.004 0.006 0.011 0.015 0.010 0.006 0.005 0.004 0.004 0.004 0.050 0.052 0.064 0.095 0.126 0.081 0.090 0.133 0.174 0.145 0.167 0.109 0.121 0.095 0.071 0.042 0.656 0.697 0.796 0.840 0.478 0.275 0.369 0.566 1.104 1.610 1.060 0.558 0.406 0.353 0.353 0.445 0.996 1.241 1.060 0.479 0.137 0,057 0.076 0.160 0.699 1.796 0.790 0.289 0.293 0.394 0.403 0.566 1.063 1.206 0.477 0.115 0.022 0.006 0.022 0.035 0.296 0.927 0.202 0.123 0.258 0.491 0.532 0.631 1.203 1.182 0.203 0.038 0.005 8.004 0.014 0.034 0.251 0.815 0.097 0.088 0.256 0.520 0.608 0.795 0.034 0.072 0.005 0.002 0.000 0.000 0.001 0.014 0.076 0.076 0.004 0.004 0.008 0.021 0.046 0.034 0.000 0.002 0.000 0.000 0.000 0.000 0.001 0.000 0.004 0.002 0.000 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 4.007 4.458 2.612 1.577 0.774 0.426 0.575 0.949 2.615 5.386 2.329 1.177 1.347 1.879 2.017 2.517 SUBTOTAL 0.104 1.615 10.566 9.436 6.405 6.113 0.395 0.010 0.000 34.645 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS D TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS TOTAL HOURS CALM METEOROLOGICAL FACILITY:

Watts Bar Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 4.96 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A2-4 170639 58946 58253 168144 175 Joint Percentage Frequencies of Wind Direction and Wind Speed for Difference Stability Classes STABILITY CLASS E

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

Watts Bar Nuclear Plant JAN 1, 1986 -

DEC 31, 2005 WIND SPEED (MPH)

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

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW

>=24.5 TOTAL 0.032 0.029 0.039 0.053 0.029 0.014 0.018 0.032 0.077 0.123 0.101 0.072 0.064 0.059 0.048 0.036 0.156 0.142 0.169 0.240 0.277 0.167 0.203 0.324 0.519 0.604 0.731 0.736 0.698 0.645 0.461 0.255 0.484 0.431 0.606 0.813 0.310 0.118 0.149 0.321 1.012 1.864 1.291 0.711 0.591 0.537 0.507 0.457 0.623 0.322 0.366 0.196 0.040 0.024 0.048 0.083 0.415 1.178 0.307 0.147 0.194 0.263 0.279 0.375 0.300 0.171 0.068 0.015 0.011 0.006 0.025 0.051 0.197 0.645 0.121 0.087 0.083 0.099 0.108 0.247 0.062 0.047 0.012 0.004 0.003 0.004 0.017 0.039 0.193 0.516 0.062 0.037 0.034 0.037 0.047 0.092 0.002 0.003 0.003 0.001 0.000 0.001 0.002 0.007 0.041 0.051 0.002 0.001 0.000 0.001 0.002 0.005 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.659 1.144 1.264 1.321 0.671 0.333 0.462 0.856 2.454 4.981 2.616 1.792 1.664 1.642 1.453 1.465 SUBTOTAL 0.827 6.326 10.201 4.862 2.234 1.206 0.121 0.002 0.000 25.777 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS E TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 170639 44130 43343 168144 1390 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY TOTAL HOURS CALM OBSERVATIONS METEOROLOGICAL FACILITY:

Watts Bar Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 3.03 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A2-5 Joint Percentage Frequencies of Wind Direction and Wind Speed for Difference Stability Classes STABILITY CLASS F (1.5< DELTA T<= 4.0 C/100 M)

Watts Bar Nuclear Plant JAN 1, 1986 -

DEC 31, 2005 WIND SPEED (MPH)

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

>=24.5 TOTAL WIND DIRECTION N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW 0.046 0.038 0.050 0.064 0.033 0.015 0.016 0.025 0.056 0.103 0.136 0.167 0.183 0.177 0.171 0.080 0.268 0.199 0.218 0.275 0.197 0.121 0.019 0.177 0.313 0.459 0.698 0.994 1.268 1.279 1.198 0.525 0.181 0.172 0.266 0.348 0.123 0.027 0.036 0.066 0.236 0.547 0.627 0.639 0.522 0.447 0.472 0.254 0.018 0.016 0.029 0.032 0.005 0.000 0.004 0.010 0.032 0.156 0.040 0.023 0.021 0.029 0.034 0.036 0.001 0.002 0.002 0.002 0.001 0.000 0.001 0.001 0.004 0.020 0.006 0.002 0.003 0.001 0.002 0.002 0.001 0.001 0.000 0.001 0.000 0.000 0.001 0.002 0.002 0.004 0.001 0.001 0.001 0.001 0.001 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.100 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.515 0.429 0.565 0.721 0.358 0.163 0.176 0.282 0.643 1.290 1.507 1.827 1.999 1.933 1.878 0.897 SUBTOTAL 1.360 8.307 4.963 0.486 0.049 0.016 0.001 0.000 0.000 15.181 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS F TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 170639 26048 25526 168144 2286 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY TOTAL HOURS CALM OBSERVATIONS METEOROLOGICAL FACILITY:

Watts Bar Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 1.42 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A2-6 Joint Percentage Frequencies of Wind Direction and Wind Speed for Difference Stability Classes STABILITY CLASS G (DELTA T > 4.0 C/100 M)

Watts Bar Nuclear Plant JAN 1, 1986 -

DEC 31, 2005 WIND SPEED (MPH)

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

>=24.5 TOTAL N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW 0.035 0.034 0.048 0.059 0.032 0.016 0.021 0.025 0.036 0.060 0.096 0.162 0.169 0.130 0.127 0.058 0.221 0.199 0.271 0.300 0.202 0.116 0.145 0.173 0.246 0.367 0.569 0.916 1.036 0.825 0.751 0.356 0.066 0.077 0.123 0.188 0.058 0.018 0.023 0.032 0.051 0.123 0.222 0.410 0.351 0.240 0.292 0.120 0.001 0.001 0.002 0.004 0.002 0.000 0.000 0.001 0.002 0.005 0.002 0.007 0.002 0.004 0.002 0.002 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.323 0.310 0.444 0.551 0.294 0.151 0.189 0.231 0.335 0.556 0.889 1.495 1.559 1.200 1.173 0.536 SUBTOTAL 1.109 6.695 2.394 0.037 0.001 0.000 0.000 0.000 0.000 10.236 TOTAL HOURS OF VALID STABILITY OBSERVATIONS TOTAL HOURS OF STABILITY CLASS G TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY TOTAL HOURS CALM CLASS G OBSERVATIONS 170639 17454 17211 168144 1864 METEOROLOGICAL FACILITY:

Watts Bar Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL MEAN WIND SPEED = 1.14 NOTE:

TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E2-A2-7 List of Commitments

1.

This information will be added to the Unit 2 FSAR in Amendment 104. [Cover Letter]

E3-1