ML11318A071

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2011/11/08 Watts Bar 2 OL - TVA Letter to NRC_11-07-11_FSAR Section 2.3
ML11318A071
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Site: Watts Bar Tennessee Valley Authority icon.png
Issue date: 11/08/2011
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1 WBN2Public Resource From: Boyd, Desiree L [dlboyd@tva.gov]

Sent: Tuesday, November 08, 2011 8:03 AM To: Epperson, Dan; Poole, Justin; Raghavan, Rags; Milano, Patrick; Campbell, Stephen Cc: Arent, Gordon; Hamill, Carol L; Boyd, Desiree L

Subject:

TVA letter to NRC_11-07-11_FSAR Section 2.3 Attachments:

11-07-11_FSAR Section 2.3_Final.pdfPlease see attached TVA letter that was sent to the NRC today.

Thank You, ~*~*~*~*~*~*~*~*~*~*~*~

Désireé L. Boyd WBN 2 Licensing Support Sun Technical Services

dlboyd@tva.gov 423-365-8764

Hearing Identifier: Watts_Bar_2_Operating_LA_Public Email Number: 568 Mail Envelope Properties (7AB41F650F76BD44B5BCAB7C0CCABFAF250BF820)

Subject:

TVA letter to NRC_11-07-11_FSAR Section 2.3 Sent Date: 11/8/2011 8:02:53 AM Received Date: 11/8/2011 8:03:38 AM From: Boyd, Desiree L Created By: dlboyd@tva.gov Recipients: "Arent, Gordon" <garent@tva.gov>

Tracking Status: None "Hamill, Carol L" <clhamill@tva.gov>

Tracking Status: None "Boyd, Desiree L" <dlboyd@tva.gov> Tracking Status: None "Epperson, Dan" <Dan.Epperson@nrc.gov> Tracking Status: None "Poole, Justin" <Justin.Poole@nrc.gov>

Tracking Status: None "Raghavan, Rags" <Rags.Raghavan@nrc.gov> Tracking Status: None "Milano, Patrick" <Patrick.Milano@nrc.gov> Tracking Status: None "Campbell, Stephen" <Stephen.Campbell@nrc.gov>

Tracking Status: None Post Office: TVANUCXVS2.main.tva.gov Files Size Date & Time MESSAGE 291 11/8/2011 8:03:38 AM 11-07-11_FSAR Section 2.3_Final.pdf 312253 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: Recipients Received:

U.S. Nuclear Regulatory Commission Page 2 November 7, 2011

Enclosure:

1. Draft FSAR Section 2.3 Tables

cc (Enclosure):

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

U.S. Nuclear Regulatory Commission Page 3 November 7, 2011

bcc (Enclosure):

Stephen Campbell

U.S. Nuclear Regulatory Commission

MS 08H4A One White Flint North 11555 Rockville Pike Rockville, Maryland 20852-2738

Patricia Holahan, Acting Deputy Regional Administrator for Construction U. S. Nuclear Regulatory Commission Region II Marquis One Tower

245 Peachtree Center Ave., NE Suite 1200 Atlanta, Georgia 30303-1257

ENCLOSURE 1 Draft FSAR Section 2.3 Tables Tables Provided 2.3-61b Calculated 1-Hour Average Atmospheric Dispersion Factors (X/Q) at Minimum Distance (1100 Meters)

Between Release Zone (100 m Radius) and Exclusion Area Boundary (1200 m Radius) for Watts Bar Nuclear

Plant 2.3-62b Calculated 1-Hour Average and Annual Average Atmospheric Dispersion Factors (X/Q) at Low Population Zone Distance (4828 Meters) for Watts Bar Nuclear Plant 2.3-63b Values of 5th Percentile Overall Site 8-Hour, 16-Hour, 3-Day, and 26-Day Atmospheric Dispersion Factors (X/Q) at Low Population Zone Distance (4828 Meters) for Watts Bar Nuclear Plant 2.3-64b 0.5th Percentile Sector Values of 8-Hour, 16-Hour, 3-Day, And 26-Day Atmospheric Dispersion Factors (X/Q) at

Low Population Zone Outer Boundary Distance (4828 Meters) for Watts Bar Nuclear Plant 2.3-66b Atmospheric Dispersion Factors (X/Q), sec/m 3 , for Design Basis Accident Analyses Based on Onsite Meteorological Data for Watts Bar Nuclear Plant 2.3-67b Dispersion Meteorology - Onsite 10-Meter Wind Data - 5th Percentile Values of Inverse Wind Speed (1/u)

Distributions for Post-LOCA Control Bay Dose

Calculations for Watts Bar Nuclear Plant 2.3 82 Joint Percentage Frequencies of Wind Direction and Wind Speed for Each Stability Class A through G (seven tables) 2.3-83 Joint Percentage Frequencies of Wind Speed by Stability Class Watts Bar Nuclear Plant

E1-1 Table 2.3-61b Calculated 1-Hour Average Atmospheric Dispersion Factors (X/Q) at Minimum Distance (1100 Meters) Between Release Zone (100 m Radius) and Exclusion Area Boundary (1200 m Radius) for Watts Bar Nuclear Plant Based on RG 1.145 and Meteorological Data for 1991 through 2010*

Plume Sector Direction 0.5th Percentile X/Q Value (sec/m³)

5th Percentile X/Q Value (sec/m³) N 3.681E-04 3.460E-05 NNE 4.601E-04 6.261E-05 NE 5.285E-04 6.777E-05 ENE 6.276E-04 1.005E-04 E 6.382E-04 1.386E-04 ESE 6.309E-04 8.259E-05 SE 6.103E-04 4.620E-05 SSE 4.509E-04 2.383E-05 S 3.044E-04 2.664E-05 SSW 2.463E-04 2.498E-05 SW 3.080E-04 9.021E-06 WSW 3.244E-04 ** W 2.437E-04 ** WNW 1.471E-04 ** NW 1.640E-04 ** NNW 2.278E-04 ** All Directions Combined 9.297E-04 5.486E-04

  • Meteorological facility located 0.8 km SSW of reactor site. Temperature instruments are 9.51 and 45.63 meters above ground. Wind speed and direction is measured at 9.72-meter level. Joint percent valid data in data base = 96.9. ** Less than 5% of the hours had nonzero X/Q values.

E1-2 Table 2.3-62b Calculated 1-Hour Average and Annual Average Atmospheric Dispersion Factors (X/Q) at Low Population Zone Distance (4828 Meters) for Watts Bar Nuclear Plant Based on RG 1.145 and Meteorological Data for 1991 through 2010*

Plume Sector Direction 0.5th Percentile X/Q Value (sec/m³)

5th Percentile X/Q Value (sec/m³)

Annual Average X/Q Value (sec/m³)N 8.003E-05 4.982E-06 8.135E-07 NNE 1.175E-04 1.139E-05 1.640E-06 NE 1.428E-04 1.178E-05 2.220E-06 ENE 1.698E-04 1.824E-05 2.255E-06 E 1.784E-04 2.669E-05 2.541E-06 ESE 1.703E-04 1.464E-05 2.640E-06 SE 1.554E-04 7.360E-06 1.568E-06 SSE 1.159E-04 2.844E-06 9.011E-07 S 6.924E-05 3.330E-06 7.804E-07 SSW 5.744E-05 2.958E-06 6.690E-07 SW 6.975E-05 5.074E-07 7.880E-07 WSW 7.696E-05 ** 6.594E-07 W 5.371E-05 ** 2.940E-07 WNW 2.669E-05 ** 2.754E-07 NW 3.036E-05 ** 2.080E-07 NNW 4.656E-05 ** 2.983E-07 All Directions Combined 2.798E-04 1.484E-04 --

  • Meteorological facility located 0.8 km SSW of reactor site. Temperature instruments are 9.51 and 45.63 meters above ground. Wind speed and direction is measured at 9.72-meter level. Joint percent valid data in data base = 96.9. ** Less than 5% of the hours had nonzero X/Q values.

E1-3 Table 2.3-63b Values of 5th Percentile Overall Site 8-Hour, 16-Hour, 3-Day, and 26-Day Atmospheric Dispersion Factors (X/Q) at Low Population Zone Distance (4828 Meters) for Watts Bar Nuclear Plant Based on R.G. 1.145 Method of Logarithmic Interpolation between Overall 5th Percentile 1-hour X/Q Assumed to Apply for 2-hour Period and Maximum Sector Annual Average X/Q (underscored in Table 2.3-62b)*

Averaging period 5th Percentile X/Q Value (sec/m³)

8-hour 7.623E-05 16-hour 5.464E-05 3-day 2.652E-05 26-day 9.395E-06

  • 1-hour and annual average X/Qs calculated from meteorological data for 1991 through 2010. Meteorological facility located 0.8 km SSW of reactor site. Temperature instruments are 9.51 and 45.63 meters above ground. Wind speed and direction is measured at 9.72-meter level.

Joint percent valid data in data base = 96.9.

E1-4 Table 2.3-64b 0.5th Percentile Sector Values of 8-Hour, 16-Hour, 3-Day, And 26-Day Atmospheric Dispersion Factors (X/Q) at Low Population Zone Outer Boundary Distance (4828 Meters) For Watts Bar Nuclear Plant Based on R.G. 1.145 Method of Logarithmic Interpolation between 0.5th Percentile 1-hour X/Q for Each Sector and Annual Average X/Q for Same Sector.*

Plume Sector Direction Sector-Specific X/Q Value (sec/m³) 8-hour 16-hour 3-day 26-day N 3.748E-05 2.565E-05 1.126E-05 3.453E-06 NNE 5.799E-05 4.074E-05 1.893E-05 6.302E-06 NE 7.173E-05 5.084E-05 2.409E-05 8.242E-06 ENE 8.312E-05 5.815E-05 2.679E-05 8.801E-06 E 8.835E-05 6.217E-05 2.900E-05 9.701E-06 ESE 8.549E-05 6.058E-05 2.869E-05 9.811E-06 SE 7.269E-05 4.971E-05 2.180E-05 6.672E-06 SSE 5.194E-05 3.476E-05 1.454E-05 4.163E-06 S 3.298E-05 2.276E-05 1.018E-05 3.207E-06 SSW 2.751E-05 1.904E-05 8.565E-06 2.721E-06 SW 3.324E-05 2.295E-05 1.027E-05 3.236E-06 WSW 3.503E-05 2.364E-05 1.006E-05 2.954E-06 W 2.270E-05 1.476E-05 5.800E-06 1.517E-06 WNW 1.253E-05 8.584E-06 3.779E-06 1.164E-06 NW 1.332E-05 8.821E-06 3.608E-06 9.999E-07 NNW 2.020E-05 1.331E-05 5.378E-06 1.464E-06

  • 1-hour and annual average X/Qs calculated from meteorological data for 1991 through 2010. Meteorological facility located 0.8 km SSW of reactor site. Temperature instruments are 9.51 and 45.63 meters above ground. Wind speed and direction is measured at 9.72-meter level.

Joint percent valid data in data base = 96.9.

E1-5 Table 2.3-66b Atmospheric Dispersion Factors (X/Q), sec/m 3 , for Design Basis Accident Analyses Based on Onsite Meteorological Data for Watts Bar Nuclear Plant Regulatory Guide 1.145 Results (maximum sector 0.5th percentile 1-hour value for 0-2 hours at exclusion area boundary and at low population zone; and 8-hour, 16-hour, 3-day and 26-day values for 2-8, 8-24, 24-96, and 96-720 hours from logarithmic interpolation between 0.5th percentile maximum sector 1-hour value at 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> and corresponding sector annual average value at 8760 hours0.101 days <br />2.433 hours <br />0.0145 weeks <br />0.00333 months <br /> at low population zone) for 1991 through 2010 Data*.

Period (hours) Minimum Distance to Exclusion Boundary (1100 m**)

Low Population Zone (4828 m) 0-2 6.382E-04 1.784E-04 2-8 8.835E-05 8-24 6.217E-05 24-96 2.900E-05 96-720 9.811E-06

  • Hourly 10-m wind and 10-m and 46-m temperature data.

Meteorological facility located 0.8 km SSW of reactor site.

Calms assigned a wind speed of 0.6 mph. ** Travel distance from 100-m radius release zone to 1200-m exclusion area boundary distance.

E1-6 E1-7 Table 2.3-67b Dispersion Meteorology - Onsite 10-Meter Wind Data - 5th Percentile Values of Inverse Wind Speed (1/u) Distributions for Post-LOCA Control Bay Dose Calculations for Watts Bar Nuclear Plant January 1991 through December 2010 Wind Speed and Direction Data

  • Plume Sectors (degrees)

Averaging Periods 1-hour 8-hour 16-hour 3-day 26-day 89.75-157.25 2.034 1.223 0.957 0.692 0.547 132.25-199.75 1.177 0.680 0.565 0.413 0.304 154.75-222.25 0.828 0.565 0.494 0.361 0.250 192.25-259.75 0.895 0.609 0.532 0.382 0.265

  • Meteorological facility is located 0.8 km SSW of reactor site.

Calms are assumed to be 0.6 mph.

E1-8 Table 2.3-76 Joint Percentage Frequencies of Wind Direction and Wind Speed for Different Stability Classes

STABILITY CLASS A (DELTA T<=-1.9 C/100 M)

WATTS BAR NUCLEAR PLANT

JAN 1, 1991 - DEC 31, 2010

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 0.001 0.014 0.065 0.118 0.136 0.006 0.000 0.000 0.340

NNE 0.000 0.000 0.016 0.097 0.152 0.219 0.007 0.000 0.000 0.490

NE 0.000 0.000 0.026 0.084 0.077 0.072 0.000 0.000 0.000 0.258

ENE 0.000 0.000 0.026 0.059 0.042 0.016 0.000 0.000 0.000 0.144

E 0.000 0.000 0.025 0.033 0.008 0.004 0.000 0.000 0.000 0.069

ESE 0.000 0.000 0.008 0.021 0.002 0.001 0.000 0.000 0.000 0.032

SE 0.000 0.001 0.016 0.016 0.006 0.004 0.000 0.000 0.000 0.042

SSE 0.000 0.000 0.029 0.041 0.012 0.010 0.001 0.000 0.000 0.093

S 0.000 0.001 0.041 0.117 0.129 0.099 0.015 0.000 0.000 0.402 SSW 0.000 0.001 0.037 0.300 0.537 0.562 0.022 0.000 0.000 1.459 SW 0.000 0.001 0.024 0.126 0.145 0.055 0.001 0.000 0.000 0.351

WSW 0.000 0.000 0.006 0.020 0.019 0.039 0.007 0.000 0.000 0.092

W 0.000 0.000 0.006 0.006 0.029 0.070 0.006 0.000 0.000 0.117

WNW 0.000 0.000 0.006 0.009 0.024 0.095 0.005 0.000 0.000 0.139

NW 0.000 0.000 0.004 0.009 0.028 0.087 0.011 0.000 0.000 0.138

NNW 0.000 0.000 0.009 0.027 0.059 0.124 0.011 0.000 0.000 0.230

SUBTOTAL 0.000 0.004 0.293 1.030 1.386 1.592 0.091 0.000 0.000 4.398

TOTAL HOURS OF VALID STABILITY OBSERVATIONS 171942

TOTAL HOURS OF STABILITY CLASS A 7524 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 7473 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 169934

TOTAL HOURS CALM 0

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 = 6.89

NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-9 Table 2.3-77 Joint Percentage Frequencies of Wind Direction and Wind Speed for Different Stability Classes

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

WATTS BAR NUCLEAR PLANT

JAN 1, 1991 - DEC 31, 2010

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 0.023 0.105 0.098 0.108 0.003 0.000 0.000 0.337

NNE 0.000 0.000 0.030 0.172 0.172 0.219 0.006 0.000 0.000 0.600

NE 0.000 0.000 0.058 0.139 0.078 0.059 0.000 0.000 0.000 0.334

ENE 0.000 0.000 0.041 0.083 0.035 0.008 0.000 0.000 0.000 0.167

E 0.000 0.001 0.026 0.048 0.005 0.001 0.000 0.000 0.000 0.081

ESE 0.000 0.001 0.019 0.026 0.001 0.000 0.000 0.000 0.000 0.047

SE 0.000 0.000 0.026 0.028 0.004 0.002 0.000 0.000 0.000 0.061

SSE 0.000 0.000 0.038 0.038 0.009 0.004 0.000 0.000 0.000 0.089

S 0.000 0.000 0.055 0.142 0.081 0.045 0.010 0.001 0.000 0.334 SSW 0.000 0.001 0.058 0.342 0.270 0.198 0.014 0.000 0.000 0.883 SW 0.000 0.000 0.026 0.179 0.069 0.019 0.000 0.000 0.000 0.294

WSW 0.000 0.000 0.008 0.040 0.015 0.019 0.001 0.000 0.000 0.084

W 0.000 0.000 0.005 0.015 0.031 0.047 0.009 0.000 0.000 0.107

WNW 0.000 0.001 0.004 0.013 0.037 0.082 0.006 0.000 0.000 0.143

NW 0.000 0.000 0.005 0.021 0.034 0.078 0.009 0.000 0.000 0.147

NNW 0.000 0.000 0.008 0.041 0.055 0.080 0.004 0.000 0.000 0.188

SUBTOTAL 0.000 0.004 0.430 1.432 0.996 0.970 0.063 0.001 0.000 3.895

TOTAL HOURS OF VALID STABILITY OBSERVATIONS 171942

TOTAL HOURS OF STABILITY CLASS B 6670 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 6619 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 169934

TOTAL HOURS CALM 0

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 = 6.08

NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-10 Table 2.3-78 Joint Percentage Frequencies of Wind Direction and Wind Speed for Different Stability Classes

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

WATTS BAR NUCLEAR PLANT

JAN 1, 1991 - DEC 31, 2010

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 0.058 0.163 0.134 0.149 0.004 0.000 0.000 0.508

NNE 0.000 0.001 0.108 0.255 0.214 0.233 0.013 0.000 0.000 0.824

NE 0.000 0.002 0.117 0.206 0.089 0.052 0.001 0.000 0.000 0.467

ENE 0.000 0.001 0.097 0.118 0.023 0.005 0.001 0.000 0.000 0.245

E 0.000 0.002 0.069 0.055 0.005 0.001 0.000 0.000 0.000 0.132

ESE 0.000 0.001 0.049 0.036 0.003 0.001 0.000 0.000 0.000 0.091

SE 0.000 0.002 0.062 0.045 0.004 0.001 0.000 0.000 0.000 0.114

SSE 0.000 0.002 0.074 0.071 0.009 0.003 0.001 0.000 0.000 0.159

S 0.000 0.001 0.116 0.252 0.085 0.047 0.006 0.001 0.000 0.508 SSW 0.000 0.001 0.152 0.464 0.255 0.171 0.012 0.000 0.000 1.056 SW 0.000 0.002 0.083 0.269 0.076 0.009 0.001 0.000 0.000 0.440

WSW 0.000 0.001 0.024 0.058 0.027 0.021 0.002 0.000 0.000 0.132

W 0.000 0.001 0.016 0.034 0.039 0.046 0.004 0.000 0.000 0.139

WNW 0.000 0.000 0.016 0.038 0.058 0.105 0.006 0.000 0.000 0.224

NW 0.000 0.000 0.021 0.042 0.052 0.095 0.009 0.000 0.000 0.219

NNW 0.000 0.000 0.034 0.070 0.072 0.101 0.006 0.000 0.000 0.282

SUBTOTAL 0.000 0.016 1.097 2.176 1.143 1.041 0.066 0.001 0.000 5.541

TOTAL HOURS OF VALID STABILITY OBSERVATIONS 171942

TOTAL HOURS OF STABILITY CLASS C 9494 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 9416 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 169934

TOTAL HOURS CALM 0

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 = 5.49

NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-11 Table 2.3-79 Joint Percentage Frequencies of Wind Direction and Wind Speed for Different Stability Classes

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

WATTS BAR NUCLEAR PLANT

JAN 1, 1991 - DEC 31, 2010

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 0.048 0.664 0.970 1.049 1.087 0.024 0.000 0.000 3.847

NNE 0.004 0.047 0.702 1.162 1.020 0.979 0.057 0.002 0.000 3.973

NE 0.005 0.050 0.798 0.976 0.415 0.170 0.004 0.000 0.000 2.418

ENE 0.005 0.089 0.834 0.447 0.101 0.036 0.002 0.000 0.000 1.515

E 0.003 0.102 0.517 0.144 0.023 0.005 0.000 0.000 0.000 0.794

ESE 0.002 0.081 0.317 0.062 0.008 0.004 0.000 0.000 0.000 0.474

SE 0.003 0.087 0.392 0.082 0.024 0.013 0.000 0.001 0.000 0.602

SSE 0.004 0.120 0.620 0.178 0.039 0.032 0.009 0.000 0.000 1.003

S 0.008 0.159 1.179 0.760 0.288 0.280 0.083 0.004 0.000 2.762 SSW 0.011 0.136 1.736 1.934 0.922 0.770 0.059 0.001 0.000 5.567 SW 0.007 0.163 1.138 0.853 0.204 0.094 0.004 0.000 0.000 2.462

WSW 0.004 0.114 0.593 0.310 0.124 0.099 0.001 0.000 0.000 1.244

W 0.003 0.119 0.421 0.313 0.231 0.252 0.008 0.000 0.000 1.347

WNW 0.003 0.084 0.373 0.438 0.521 0.478 0.018 0.000 0.000 1.915

NW 0.002 0.059 0.372 0.427 0.567 0.598 0.040 0.001 0.000 2.067

NNW 0.003 0.035 0.481 0.558 0.655 0.839 0.035 0.000 0.000 2.607

SUBTOTAL 0.071 1.495 11.138 9.614 6.191 5.735 0.345 0.008 0.000 34.598

TOTAL HOURS OF VALID STABILITY OBSERVATIONS 171942

TOTAL HOURS OF STABILITY CLASS D 59374 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 58793 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 169934

TOTAL HOURS CALM 121

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 = 4.86

NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-12 Table 2.3-80 Joint Percentage Frequencies of Wind Direction and Wind Speed for Different Stability Classes

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

WATTS BAR NUCLEAR PLANT

JAN 1, 1991 - DEC 31, 2010

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 0.020 0.131 0.474 0.609 0.324 0.058 0.002 0.000 0.000 1.618

NNE 0.018 0.122 0.423 0.304 0.161 0.047 0.003 0.000 0.000 1.078

NE 0.025 0.149 0.598 0.350 0.061 0.011 0.004 0.000 0.000 1.197

ENE 0.033 0.208 0.790 0.188 0.012 0.002 0.001 0.000 0.000 1.235

E 0.018 0.237 0.322 0.043 0.012 0.002 0.000 0.000 0.000 0.636

ESE 0.009 0.157 0.130 0.022 0.007 0.004 0.000 0.000 0.000 0.330

SE 0.011 0.183 0.151 0.045 0.023 0.012 0.001 0.000 0.000 0.425

SSE 0.020 0.300 0.294 0.085 0.046 0.038 0.006 0.000 0.000 0.789

S 0.048 0.469 0.983 0.402 0.197 0.183 0.031 0.001 0.000 2.314 SSW 0.082 0.561 1.928 1.181 0.575 0.395 0.026 0.000 0.000 4.749 SW 0.068 0.701 1.348 0.308 0.109 0.052 0.002 0.000 0.000 2.588

WSW 0.050 0.713 0.800 0.141 0.077 0.031 0.000 0.000 0.000 1.810

W 0.046 0.703 0.687 0.201 0.078 0.029 0.000 0.000 0.000 1.745

WNW 0.040 0.617 0.600 0.295 0.100 0.041 0.001 0.000 0.000 1.693

NW 0.032 0.410 0.565 0.295 0.125 0.059 0.002 0.001 0.000 1.489

NNW 0.022 0.211 0.467 0.425 0.290 0.094 0.005 0.000 0.000 1.513

SUBTOTAL 0.543 5.873 10.559 4.895 2.197 1.057 0.084 0.002 0.000 25.209

TOTAL HOURS OF VALID STABILITY OBSERVATIONS 171942

TOTAL HOURS OF STABILITY CLASS E 43451 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 42839 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 169934

TOTAL HOURS CALM 923

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 E1-13 Table 2.3-81 Joint Percentage Frequencies of Wind Direction and Wind Speed for Different Stability Classes

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

WATTS BAR NUCLEAR PLANT

JAN 1, 1991 - DEC 31, 2010

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 0.026 0.227 0.173 0.017 0.000 0.001 0.000 0.000 0.000 0.444

NNE 0.022 0.181 0.165 0.010 0.002 0.001 0.000 0.000 0.000 0.381

NE 0.027 0.176 0.237 0.028 0.002 0.001 0.000 0.000 0.000 0.470

ENE 0.034 0.220 0.304 0.022 0.000 0.001 0.000 0.000 0.000 0.580

E 0.019 0.167 0.125 0.004 0.000 0.000 0.000 0.000 0.000 0.315

ESE 0.009 0.115 0.028 0.000 0.000 0.000 0.000 0.000 0.000 0.152

SE 0.009 0.107 0.035 0.004 0.001 0.002 0.000 0.000 0.000 0.157

SSE 0.014 0.152 0.058 0.009 0.002 0.001 0.001 0.000 0.000 0.236

S 0.033 0.272 0.238 0.033 0.003 0.001 0.000 0.000 0.000 0.580 SSW 0.066 0.424 0.594 0.150 0.009 0.004 0.000 0.000 0.000 1.247 SW 0.088 0.687 0.677 0.029 0.005 0.000 0.000 0.000 0.000 1.486

WSW 0.113 1.020 0.728 0.019 0.002 0.002 0.000 0.000 0.000 1.884

W 0.132 1.389 0.659 0.022 0.004 0.000 0.000 0.000 0.000 2.207

WNW 0.129 1.411 0.577 0.028 0.002 0.001 0.000 0.000 0.000 2.148

NW 0.110 1.159 0.546 0.034 0.004 0.000 0.000 0.000 0.000 1.852

NNW 0.046 0.436 0.272 0.038 0.004 0.001 0.000 0.000 0.000 0.796

SUBTOTAL 0.876 8.143 5.415 0.447 0.037 0.014 0.001 0.000 0.000 14.933

TOTAL HOURS OF VALID STABILITY OBSERVATIONS 171942

TOTAL HOURS OF STABILITY CLASS F 25798 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 25377 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 169934

TOTAL HOURS CALM 1489

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 = 1.47

NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-14 Table 2.3-82 Joint Percentage Frequencies of Wind Direction and Wind Speed for Different Stability Classes

STABILITY CLASS G (DELTA T > 4.0 C/100 M)

WATTS BAR NUCLEAR PLANT

JAN 1, 1991 - DEC 31, 2010

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 0.021 0.215 0.071 0.002 0.000 0.000 0.000 0.000 0.000 0.309

NNE 0.018 0.177 0.068 0.000 0.000 0.000 0.000 0.000 0.000 0.263

NE 0.024 0.231 0.099 0.002 0.000 0.000 0.000 0.000 0.000 0.357

ENE 0.028 0.235 0.151 0.001 0.001 0.000 0.000 0.000 0.000 0.415

E 0.017 0.172 0.057 0.001 0.000 0.000 0.000 0.000 0.000 0.246

ESE 0.010 0.117 0.022 0.000 0.000 0.000 0.000 0.000 0.000 0.148

SE 0.012 0.141 0.022 0.000 0.000 0.000 0.000 0.000 0.000 0.175

SSE 0.013 0.151 0.028 0.001 0.000 0.000 0.000 0.000 0.000 0.193

S 0.023 0.267 0.056 0.002 0.001 0.000 0.000 0.000 0.000 0.349 SSW 0.039 0.405 0.137 0.006 0.001 0.000 0.000 0.000 0.000 0.589 SW 0.069 0.664 0.282 0.003 0.000 0.000 0.000 0.000 0.000 1.018

WSW 0.118 1.112 0.525 0.005 0.000 0.000 0.000 0.000 0.000 1.760

W 0.134 1.359 0.489 0.002 0.000 0.000 0.000 0.000 0.000 1.984

WNW 0.108 1.123 0.364 0.005 0.000 0.000 0.000 0.000 0.000 1.600

NW 0.097 0.930 0.405 0.003 0.000 0.000 0.000 0.000 0.000 1.435

NNW 0.039 0.383 0.159 0.004 0.000 0.000 0.000 0.000 0.000 0.585

SUBTOTAL 0.769 7.682 2.936 0.038 0.002 0.000 0.000 0.000 0.000 11.426

TOTAL HOURS OF VALID STABILITY OBSERVATIONS 171942

TOTAL HOURS OF STABILITY CLASS G 19631 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 19417 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 169934

TOTAL HOURS CALM 1306

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 = 1.20

NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-15 Table 2.3-83 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY STABILITY CLASS WATTS BAR NUCLEAR PLANT JAN 1, 1991 - DEC 31, 2010 WIND SPEED STABILITY CLASS

_______________ (MPH) A B C D E F G CALM 0.000 0.000 0.000 0.071 0.543 0.876 0.769 0.6- 1.4 0.004 0.004 0.016 1.495 5.873 8.143 7.682 1.5- 3.4 0.293 0.430 1.097 11.138 10.559 5.415 2.936 3.5- 5.4 1.030 1.432 2.176 9.614 4.895 0.447 0.038 5.5- 7.4 1.386 0.996 1.143 6.191 2.197 0.037 0.002 7.5-12.4 1.592 0.970 1.041 5.735 1.057 0.014 0.000 12.5-18.4 0.091 0.063 0.066 0.345 0.084 0.001 0.000 18.5-24.4 0.000 0.001 0.001 0.008 0.002 0.000 0.000 >=24.5 0.000 0.000 0.000 0.000 0.000 0.000 0.000 TOTAL 4.398 3.895 5.541 34.598 25.209 14.933 11.426 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 171942 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS169934 TOTAL HOURS OF OBSERVATIONS 175320 JOINT RECOVERABILITY PERCENTAGE 96.9 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

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