ML21286A277

Amendment 29 to Updated Final Safety Analysis Report, Chapter 2, Table 2.3, Meteorology

ML21286A277
Person / Time
Site:	Browns Ferry
Issue date:	10/04/2021
From:	Tennessee Valley Authority
To:	Office of Nuclear Reactor Regulation
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BFN-16 TABLE 2.3-1 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY STABILITY CLASS JAN 1, 77 - DEC 31, 79 WIND SPEED STABILITY CLASS (MPH) A B C D E F G CALM 0.0 0.0 0.0 0.00 0.01 0.01 0.02 0.6- 1.4 0.0 0.0 0.0 0.05 0.68 0.50 0.57 1.5- 3.4 0.09 0.34 0.50 5.77 10.41 5.48 4.45 3.5- 5.4 2.29 2.11 1.52 8.77 9.77 4.03 2.13 5.5- 7.4 1.19 1.00 1.04 6.02 5.55 1.59 0.57 7.5-12.4 0.90 1.63 1.22 8.09 4.50 0.90 0.17 12.5-18.4 0.42 0.47 0.33 3.36 0.70 0.04 0.0 18.5-24.4 0.02 0.06 0.06 0.46 0.07 0.01 0.0

>=24.5 0.0 0.0 0.0 0.03 0.0 0.0 0.0 TOTAL 4.91 5.61 4.67 32.55 31.69 12.56 7.91 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 25935 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY OBSERVATIONS 25577 TOTAL HOURS OF OBSERVATIONS 26280 JOINT RECOVERABILITY PERCENTAGE 97.3 METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL

BFN-16 TABLE 2.3-2 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY STABILITY CLASS JAN 1, 77 - DEC 31, 79 WIND SPEED STABILITY CLASS (MPH) A B C D E F G CALM 0.0 0.0 0.0 0.0 0.00 0.00 0.0 0.6- 1.4 0.0 0.0 0.0 0.04 0.05 0.01 0.01 1.5- 3.4 0.0 0.0 0.04 2.22 1.25 0.29 0.08 3.5- 5.4 0.0 0.01 0.08 5.98 2.73 0.65 0.18 5.5- 7.4 0.01 0.01 0.11 6.98 3.34 0.83 0.29 7.5-12.4 0.0 0.02 0.16 17.73 9.76 2.64 0.90 12.5-18.4 0.0 0.03 0.14 15.61 9.95 3.19 0.58 18.5-24.4 0.0 0.01 0.02 6.30 3.07 0.90 0.18

>=24.5 0.0 0.0 0.05 2.48 0.82 0.0 0.0 TOTAL 0.01 0.08 0.60 57.34 30.97 8.51 2.22 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 25729 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY OBSERVATIONS 25347 TOTAL HOURS OF OBSERVATIONS 26280 JOINT RECOVERABILITY PERCENTAGE 96.4 METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL

BFN-16 TABLE 2.3-3 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T< = -1.9 C/100 M)

JAN 1, 77 - DEC 31, 79 WIND WIND SPEED (MPH)

DIRECTION 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 0.0 0.0 0.0 0.04 0.12 0.05 0.0 0.0 0.21 NNE 0.0 0.0 0.0 0.05 0.19 0.10 0.0 0.0 0.34 NE 0.0 0.0 0.0 0.04 0.06 0.0 0.0 0.0 0.10 ENE 0.0 0.0 0.0 0.01 0.0 0.0 0.0 0.0 0.01 E 0.0 0.0 0.0 0.0 0.01 0.0 0.0 0.0 0.01 ESE 0.0 0.01 0.11 0.17 0.02 0.0 0.0 0.0 0.31 SE 0.0 0.03 1.11 0.40 0.02 0.0 0.0 0.0 1.56 SSE 0.0 0.04 0.52 0.10 0.02 0.0 0.0 0.0 0.68 S 0.0 0.01 0.38 0.11 0.04 0.0 0.0 0.0 0.54 SSW 0.0 0.0 0.04 0.05 0.01 0.0 0.0 0.0 0.10 SW 0.0 0.0 0.05 0.04 0.0 0.0 0.0 0.0 0.09 WSW 0.0 0.0 0.04 0.07 0.04 0.0 0.0 0.0 0.15 W 0.0 0.0 0.01 0.05 0.05 0.01 0.0 0.0 0.12 WNW 0.0 0.0 0.02 0.03 0.09 0.06 0.0 0.0 0.20 NW 0.0 0.0 0.0 0.02 0.17 0.11 0.0 0.0 0.30 NNW 0.0 0.0 0.01 0.01 0.06 0.09 0.02 0.0 0.19 SUBTOTAL 0.0 0.09 2.29 1.19 0.90 0.42 0.02 0.0 4.91 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 25935 TOTAL HOURS OF STABILITY CLASS A 1262 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 1259 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 6.8 MPH

BFN-16 TABLE 2.3-4 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA-T< = -1.7 C/100 M)

JAN 1, 77 - DEC 31, 79 WIND WIND SPEED (MPH)

DIRECTION 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 0.0 0.0 0.05 0.09 0.30 0.04 0.01 0.0 0.49 NNE 0.0 0.0 0.05 0.07 0.27 0.05 0.0 0.0 0.44 NE 0.0 0.0 0.04 0.02 0.09 0.01 0.0 0.0 0.16 ENE 0.0 0.01 0.01 0.01 0.01 0.0 0.0 0.0 0.04 E 0.0 0.0 0.02 0.01 0.0 0.0 0.0 0.0 0.03 ESE 0.0 0.02 0.10 0.04 0.0 0.0 0.0 0.0 0.16 SE 0.0 0.13 0.64 0.09 0.02 0.0 0.0 0.0 0.88 SSE 0.0 0.09 0.31 0.02 0.01 0.0 0.0 0.0 0.43 S 0.0 0.05 0.42 0.07 0.02 0.0 0.0 0.0 0.56 SSW 0.0 0.02 0.07 0.01 0.0 0.0 0.0 0.0 0.10 SW 0.0 0.0 0.17 0.02 0.0 0.0 0.0 0.0 0.19 WSW 0.0 0.0 0.11 0.13 0.05 0.01 0.0 0.0 0.30 W 0.0 0.02 0.04 0.17 0.17 0.03 0.0 0.0 0.43 WNW 0.0 0.0 0.07 0.11 0.23 0.08 0.04 0.0 0.53 NW 0.0 0.0 0.01 0.07 0.27 0.13 0.01 0.0 0.49 NNW 0.0 0.0 0.0 0.07 0.19 0.12 0.0 0.0 0.38 SUBTOTAL 0.0 0.34 2.11 1.00 1.63 0.47 0.06 0.0 5.61 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 25935 TOTAL HOURS OF STABILITY CLASS B 1445 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 1440 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 7.2 MPH

BFN-16 TABLE 2.3-5 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA-T< =-1.5 C/100 M)

JAN 1, 77 - DEC 31, 79 WIND WIND SPEED (MPH)

DIRECTION 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 0.0 0.01 0.08 0.11 0.21 0.02 0.0 0.0 0.43 NNE 0.0 0.01 0.07 0.09 0.17 0.02 0.0 0.0 0.36 NE 0.0 0.0 0.03 0.08 0.05 0.0 0.0 0.0 0.16 ENE 0.0 0.0 0.02 0.02 0.0 0.0 0.0 0.0 0.04 E 0.0 0.0 0.03 0.02 0.0 0.0 0.0 0.0 0.05 ESE 0.0 0.01 0.05 0.02 0.0 0.0 0.0 0.0 0.08 SE 0.0 0.17 0.29 0.09 0.01 0.0 0.0 0.0 0.56 SSE 0.0 0.12 0.17 0.04 0.01 0.0 0.0 0.0 0.34 S 0.0 0.11 0.25 0.04 0.02 0.0 0.0 0.0 0.42 SSW 0.0 0.03 0.06 0.01 0.0 0.0 0.0 0.0 0.10 SW 0.0 0.03 0.12 0.03 0.01 0.0 0.0 0.0 0.19 WSW 0.0 0.0 0.11 0.07 0.07 0.0 0.0 0.0 0.25 W 0.0 0.0 0.05 0.12 0.10 0.02 0.01 0.0 0.30 WNW 0.0 0.01 0.12 0.13 0.17 0.07 0.04 0.0 0.54 NW 0.0 0.0 0.05 0.09 0.22 0.10 0.01 0.0 0.47 NNW 0.0 0.0 0.02 0.08 0.18 0.10 0.0 0.0 0.38 SUBTOTAL 0.0 0.50 1.52 1.04 1.22 0.33 0.06 0.0 4.67 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 25935 TOTAL HOURS OF STABILITY CLASS C 1202 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 1197 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 7.0 MPH

BFN-16 TABLE 2.3-6 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA-T< =-0.5 C/100 M)

JAN 1, 77 - DEC 31, 79 WIND WIND SPEED (MPH)

DIRECTION 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 0.0 0.19 0.41 0.53 1.00 0.37 0.01 0.0 2.51 NNE 0.01 0.20 0.56 0.58 1.18 0.18 0.01 0.0 2.72 NE 0.01 0.12 0.38 0.43 0.52 0.01 0.0 0.0 1.47 ENE 0.0 0.26 0.23 0.15 0.05 0.01 0.0 0.0 0.70 E 0.0 0.20 0.31 0.17 0.05 0.0 0.0 0.0 0.73 ESE 0.0 0.24 0.51 0.30 0.08 0.0 0.0 0.0 1.13 SE 0.02 1.16 1.31 0.83 0.26 0.0 0.0 0.0 3.58 SSE 0.01 0.99 0.99 0.26 0.11 0.02 0.0 0.0 2.38 S 0.0 0.92 1.17 0.34 0.17 0.0 0.0 0.0 2.60 SSW 0.0 0.45 0.29 0.08 0.04 0.0 0.0 0.0 0.86 SW 0.0 0.24 0.29 0.09 0.02 0.01 0.0 0.0 0.65 WSW 0.0 0.32 0.70 0.29 0.33 0.11 0.0 0.0 1.75 W 0.0 0.18 0.55 0.62 0.63 0.22 0.03 0.0 2.23 WNW 0.0 0.13 0.39 0.42 1.10 0.82 0.22 0.01 3.09 NW 0.0 0.04 0.28 0.38 1.01 0.87 0.14 0.02 2.74 NNW 0.0 0.13 0.40 0.55 1.54 0.74 0.05 0.0 3.41 SUBTOTAL 0.05 5.77 8.77 6.02 8.09 3.36 0.46 0.03 32.55 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 25935 TOTAL HOURS OF STABILITY CLASS D 8438 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 8341 TOTAL HOURS CALM 1 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 7.1 MPH

BFN-16 TABLE 2.3-7 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA-T< = 1.5 C/100 M)

JAN 1, 77 - DEC 31, 79 WIND WIND SPEED (MPH)

DIRECTION 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 0.04 0.47 0.54 0.43 0.41 0.05 0.01 0.0 1.95 NNE 0.05 0.61 0.74 0.55 0.47 0.04 0.0 0.0 2.46 NE 0.05 0.57 0.63 0.42 0.27 0.02 0.0 0.0 1.96 ENE 0.05 0.71 0.45 0.17 0.08 0.02 0.0 0.0 1.48 E 0.04 0.61 0.74 0.16 0.07 0.0 0.0 0.0 1.62 ESE 0.03 0.76 1.01 0.53 0.16 0.01 0.0 0.0 2.50 SE 0.11 2.04 1.75 0.92 0.55 0.02 0.0 0.0 5.39 SSE 0.07 1.16 0.78 0.48 0.33 0.04 0.0 0.0 2.86 S 0.05 1.03 0.74 0.44 0.63 0.14 0.01 0.0 3.04 SSW 0.02 0.52 0.14 0.08 0.06 0.01 0.0 0.0 0.83 SW 0.04 0.30 0.07 0.02 0.03 0.0 0.0 0.0 0.46 WSW 0.01 0.53 0.60 0.14 0.11 0.04 0.0 0.0 1.43 W 0.02 0.37 0.77 0.42 0.27 0.04 0.0 0.0 1.89 WNW 0.03 0.15 0.13 0.11 0.22 0.09 0.02 0.0 0.75 NW 0.02 0.17 0.20 0.14 0.25 0.09 0.02 0.0 0.89 NNW 0.05 0.41 0.48 0.54 0.59 0.09 0.01 0.0 2.17 SUBTOTAL 0.68 10.41 9.77 5.55 4.50 0.70 0.07 0.0 31.68 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 25935 TOTAL HOURS OF STABILITY CLASS E 8264 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 8098 TOTAL HOURS CALM 3 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 5.0 MPH

BFN-16 TABLE 2.3-8 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F (1.5< DELTA-T< = 4.0 C/100 M)

JAN 1, 77 - DEC 31, 79 WIND WIND SPEED (MPH)

DIRECTION 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 0.05 0.36 0.52 0.28 0.06 0.0 0.0 0.0 1.27 NNE 0.05 0.51 0.66 0.34 0.11 0.0 0.0 0.0 1.67 NE 0.07 0.34 0.27 0.18 0.01 0.0 0.0 0.0 0.87 ENE 0.03 0.53 0.33 0.05 0.0 0.0 0.0 0.0 0.94 E 0.01 0.59 0.52 0.03 0.0 0.0 0.0 0.0 1.15 ESE 0.0 0.52 0.22 0.0 0.0 0.0 0.0 0.0 0.74 SE 0.09 0.97 0.48 0.17 0.13 0.01 0.0 0.0 1.85 SSE 0.05 0.54 0.34 0.17 0.25 0.02 0.01 0.0 1.38 S 0.03 0.29 0.18 0.20 0.27 0.01 0.0 0.0 0.98 SSW 0.03 0.13 0.03 0.0 0.01 0.0 0.0 0.0 0.20 SW 0.0 0.09 0.03 0.0 0.0 0.0 0.0 0.0 0.12 WSW 0.0 0.09 0.07 0.0 0.0 0.0 0.0 0.0 0.16 W 0.02 0.09 0.06 0.0 0.01 0.0 0.0 0.0 0.18 WNW 0.01 0.08 0.01 0.0 0.0 0.0 0.0 0.0 0.10 NW 0.01 0.08 0.04 0.01 0.0 0.0 0.0 0.0 0.14 NNW 0.05 0.27 0.27 0.16 0.05 0.0 0.0 0.0 0.80 SUBTOTAL 0.50 5.48 4.03 1.59 0.90 0.04 0.01 0.0 12.55 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 25935 TOTAL HOURS OF STABILITY CLASS F 3268 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 3223 TOTAL HOURS CALM 2 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 4.0 MPH

BFN-16 TABLE 2.3-9 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

JAN 1, 77 - DEC 31, 79 WIND WIND SPEED (MPH)

DIRECTION 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 0.07 0.76 0.32 0.02 0.0 0.0 0.0 0.0 1.17 NNE 0.05 0.83 0.51 0.18 0.02 0.0 0.0 0.0 1.59 NE 0.04 0.34 0.12 0.02 0.0 0.0 0.0 0.0 0.52 ENE 0.04 0.48 0.18 0.02 0.0 0.0 0.0 0.0 0.72 E 0.02 0.52 0.34 0.0 0.0 0.0 0.0 0.0 0.88 ESE 0.01 0.18 0.01 0.0 0.0 0.0 0.0 0.0 0.20 SE 0.08 0.43 0.09 0.04 0.03 0.0 0.0 0.0 0.67 SSE 0.03 0.44 0.31 0.16 0.08 0.0 0.0 0.0 1.02 S 0.05 0.09 0.12 0.10 0.04 0.0 0.0 0.0 0.40 SSW 0.05 0.05 0.01 0.0 0.0 0.0 0.0 0.0 0.11 SW 0.0 0.01 0.0 0.0 0.0 0.0 0.0 0.0 0.01 WSW 0.02 0.02 0.0 0.0 0.0 0.0 0.0 0.0 0.04 W 0.01 0.01 0.0 0.0 0.0 0.0 0.0 0.0 0.02 WNW 0.01 0.02 0.0 0.0 0.0 0.0 0.0 0.0 0.03 NW 0.04 0.04 0.0 0.0 0.0 0.0 0.0 0.0 0.08 NNW 0.05 0.23 0.12 0.03 0.0 0.0 0.0 0.0 0.43 SUBTOTAL 0.57 4.45 2.13 0.57 0.17 0.0 0.0 0.0 7.89 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 25935 TOTAL HOURS OF STABILITY CLASS G 2056 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 2019 TOTAL HOURS CALM 4 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 3.2 MPH

BFN-16 TABLE 2.3-10 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS JAN 1, 77 - DEC 31, 79 WIND WIND SPEED (MPH)

DIRECTION 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 0.16 1.82 1.90 1.50 2.10 0.53 0.03 0.0 8.04 NNE 0.17 2.19 2.61 1.86 2.40 0.39 0.01 0.0 9.63 NE 0.17 1.36 1.46 1.19 1.01 0.05 0.0 0.0 5.24 ENE 0.13 1.99 1.22 0.42 0.15 0.02 0.0 0.0 3.93 E 0.07 1.93 1.94 0.38 0.12 0.0 0.0 0.0 4.44 ESE 0.05 1.74 2.01 1.07 0.27 0.01 0.0 0.0 5.15 SE 0.31 4.92 5.70 2.55 1.02 0.04 0.0 0.0 14.54 SSE 0.16 3.37 3.49 1.22 0.79 0.07 0.01 0.0 9.11 S 0.14 2.50 3.27 1.30 1.19 0.15 0.02 0.0 8.57 SSW 0.10 1.20 0.65 0.23 0.12 0.01 0.0 0.0 2.31 SW 0.04 0.69 0.73 0.22 0.07 0.01 0.0 0.0 1.76 WSW 0.03 0.97 1.60 0.69 0.60 0.15 0.0 0.0 4.04 W 0.04 0.66 1.47 1.38 1.22 0.32 0.05 0.0 5.14 WNW 0.04 0.39 0.74 0.78 1.81 1.12 0.33 0.02 5.23 NW 0.07 0.33 0.57 0.71 1.91 1.29 0.17 0.02 5.07 NNW 0.15 1.05 1.31 1.44 2.58 1.13 0.09 0.01 7.76 SUBTOTAL 1.83 27.11 30.67 16.94 17.36 5.29 0.71 0.05 99.96 TOTAL HOURS OF VALID WIND OBSERVATIONS 25810 TOTAL HOURS OF OBSERVATIONS 26280 RECOVERABILITY PERCENTAGE 98.2 TOTAL HOURS CALM 10 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 5.7 MPH

BFN-16 TABLE 2.3-11 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS JANUARY (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.0 1.34 1.79 1.74 1.84 0.25 0.10 0.0 7.06 NNE 0.05 1.99 2.09 1.39 2.24 0.15 0.0 0.0 7.91 NE 0.0 1.25 1.44 1.20 1.15 0.0 0.0 0.0 5.04 ENE 0.0 1.29 1.29 0.45 0.0 0.0 0.0 0.0 3.03 E 0.05 1.39 2.84 0.50 0.15 0.0 0.0 0.0 4.93 ESE 0.05 0.80 2.29 0.80 0.10 0.0 0.0 0.0 4.04 SE 0.25 1.99 4.08 2.19 1.89 0.0 0.0 0.0 10.40 SSE 0.0 1.94 2.24 0.95 0.90 0.05 0.0 0.0 6.08 S 0.05 0.50 0.70 0.55 0.40 0.0 0.0 0.0 2.20 SSW 0.05 0.30 0.25 0.05 0.05 0.0 0.0 0.0 0.70 SW 0.0 0.10 0.15 0.05 0.0 0.0 0.0 0.0 0.30 WSW 0.0 0.60 0.75 0.10 0.10 0.15 0.0 0.0 1.70 W 0.0 0.80 0.85 1.54 1.69 1.05 0.15 0.0 6.08 WNW 0.0 0.50 0.75 0.85 3.29 3.64 1.99 0.10 11.12 NW 0.05 0.35 1.10 0.90 4.33 5.48 0.30 0.05 12.56 NNW 0.0 0.85 1.15 1.89 8.47 3.69 0.80 0.05 16.90 SUBTOTAL 0.55 15.99 23.76 15.15 26.60 14.46 3.34 0.20 100.05 TOTAL HOURS OF VALID WIND OBSERVATIONS 2008 TOTAL HOURS OF OBSERVATIONS 2232 RECOVERABILITY PERCENTAGE 90.0 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 7.9 MPH

BFN-16 TABLE 2.3-12 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS FEBRUARY (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.05 1.59 1.93 2.03 3.77 1.34 0.0 0.0 10.71 NNE 0.05 1.54 2.18 2.43 4.96 1.14 0.05 0.0 12.35 NE 0.10 0.84 1.64 1.44 1.39 0.10 0.0 0.0 5.51 ENE 0.0 1.34 0.89 0.74 0.25 0.0 0.0 0.0 3.22 E 0.15 1.54 1.19 0.60 0.25 0.0 0.0 0.0 3.73 ESE 0.10 1.39 1.14 0.69 0.05 0.0 0.0 0.0 3.37 SE 0.20 3.87 3.82 1.14 0.35 0.15 0.0 0.0 9.53 SSE 0.05 3.42 4.17 1.59 0.94 0.05 0.0 0.0 10.22 S 0.10 1.64 2.38 1.14 1.29 0.0 0.0 0.0 6.55 SSW 0.15 0.35 0.50 0.20 0.30 0.0 0.0 0.0 1.50 SW 0.0 0.35 0.64 0.40 0.15 0.10 0.0 0.0 1.64 WSW 0.05 0.45 0.64 0.30 1.34 0.64 0.0 0.0 3.42 W 0.0 0.40 0.74 0.64 1.39 0.60 0.0 0.0 3.77 WNW 0.0 0.30 0.79 0.69 2.58 1.88 0.30 0.0 6.54 NW 0.0 0.20 0.60 0.55 2.83 1.93 0.64 0.0 6.75 NNW 0.0 1.04 2.18 2.43 3.57 1.93 0.05 0.0 11.20 SUBTOTAL 1.00 20.26 25.43 17.01 25.41 9.86 1.04 0.0 100.01 TOTAL HOURS OF VALID WIND OBSERVATIONS 2016 TOTAL HOURS OF OBSERVATIONS 2016 RECOVERABILITY PERCENTAGE 100.0 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 6.8 MPH

BFN-16 TABLE 2.3-13 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS MARCH (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.09 0.68 1.49 0.95 1.35 1.31 0.0 0.0 5.87 NNE 0.05 0.95 1.89 1.26 1.85 0.41 0.0 0.0 6.41 NE 0.05 0.77 1.40 1.94 0.95 0.0 0.0 0.0 5.11 ENE 0.18 0.77 0.81 0.27 0.0 0.0 0.0 0.0 2.03 E 0.0 0.90 1.53 0.27 0.0 0.0 0.0 0.0 2.70 ESE 0.09 2.07 2.03 0.99 0.54 0.0 0.0 0.0 5.72 SE 0.05 4.64 4.96 2.39 2.52 0.18 0.05 0.0 14.79 SSE 0.14 3.83 3.92 2.88 1.76 0.23 0.09 0.0 12.85 S 0.09 1.67 3.70 2.70 3.42 0.14 0.09 0.0 11.81 SSW 0.14 0.50 0.45 0.32 0.27 0.0 0.0 0.0 1.68 SW 0.05 0.41 0.59 0.18 0.18 0.0 0.0 0.0 1.41 WSW 0.0 0.54 1.13 0.63 1.31 0.27 0.0 0.0 3.88 W 0.05 0.27 0.90 1.35 1.98 0.90 0.09 0.0 5.54 WNW 0.0 0.27 0.41 0.81 2.66 1.85 0.14 0.05 6.19 NW 0.0 0.09 0.63 0.90 2.79 1.44 0.32 0.05 6.22 NNW 0.0 0.68 1.13 1.35 2.97 1.71 0.05 0.0 7.89 SUBTOTAL 0.98 19.04 26.97 19.19 24.55 8.44 0.83 0.10 100.10 TOTAL HOURS OF VALID WIND OBSERVATIONS 2219 TOTAL HOURS OF OBSERVATIONS 2232 RECOVERABILITY PERCENTAGE 99.4 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 6.7 MPH

BFN-16 TABLE 2.3-14 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS APRIL (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.14 1.44 1.26 0.79 1.26 0.51 0.14 0.0 5.54 NNE 0.09 2.37 1.72 1.63 1.40 0.47 0.0 0.0 7.68 NE 0.23 1.44 1.49 1.82 1.44 0.05 0.0 0.0 6.47 ENE 0.14 2.00 1.16 0.51 0.19 0.05 0.0 0.0 4.05 E 0.05 1.44 1.12 0.19 0.0 0.0 0.0 0.0 2.80 ESE 0.14 1.86 1.44 1.02 0.33 0.0 0.0 0.0 4.79 SE 0.70 4.42 5.26 2.42 1.40 0.0 0.0 0.0 14.20 SSE 0.14 4.93 4.75 0.70 0.93 0.0 0.0 0.0 11.45 S 0.33 2.93 4.10 1.86 2.09 0.19 0.0 0.0 11.50 SSW 0.09 1.16 0.84 0.61 0.33 0.0 0.0 0.0 3.03 SW 0.0 0.51 0.23 0.28 0.05 0.0 0.0 0.0 1.07 WSW 0.09 0.93 1.16 0.74 1.12 0.05 0.0 0.0 4.09 W 0.0 0.56 1.63 1.30 0.88 0.19 0.14 0.0 4.70 WNW 0.05 0.28 0.42 0.79 2.28 1.58 0.56 0.0 5.96 NW 0.14 0.09 0.42 0.74 1.91 1.40 0.14 0.0 4.84 NNW 0.14 0.88 1.07 1.40 2.65 1.68 0.0 0.0 7.82 SUBTOTAL 2.47 27.24 28.07 16.80 18.26 6.17 0.98 0.0 99.99 TOTAL HOURS OF VALID WIND OBSERVATIONS 2148 TOTAL HOURS OF OBSERVATIONS 2160 RECOVERABILITY PERCENTAGE 99.4 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 5.8 MPH

BFN-16 TABLE 2.3-15 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS MAY (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.32 2.43 1.31 1.04 1.85 0.18 0.0 0.0 7.13 NNE 0.23 2.30 3.02 1.49 1.98 0.18 0.0 0.0 9.20 NE 0.23 1.76 1.49 0.81 1.04 0.0 0.0 0.0 5.33 ENE 0.32 3.16 1.44 0.09 0.14 0.0 0.0 0.0 5.15 E 0.09 2.75 1.58 0.41 0.14 0.0 0.0 0.0 4.97 ESE 0.09 1.85 2.98 1.17 0.18 0.0 0.0 0.0 6.27 SE 0.23 5.55 6.40 1.80 0.23 0.0 0.0 0.0 14.21 SSE 0.18 3.88 3.11 0.90 0.50 0.0 0.0 0.0 8.57 S 0.18 3.07 3.34 1.26 0.72 0.05 0.0 0.0 8.62 SSW 0.0 1.71 1.26 0.41 0.0 0.0 0.0 0.0 3.38 SW 0.05 1.04 1.31 0.32 0.23 0.0 0.0 0.0 2.95 WSW 0.0 1.13 2.30 1.35 0.54 0.05 0.0 0.0 5.37 W 0.0 0.59 1.49 1.58 1.67 0.32 0.14 0.0 5.79 WNW 0.18 0.50 0.41 0.90 1.53 0.27 0.36 0.0 4.15 NW 0.09 0.41 0.59 1.04 1.35 0.41 0.05 0.0 3.94 NNW 0.32 1.22 0.81 0.41 1.44 0.86 0.05 0.0 5.11 SUBTOTAL 2.51 33.35 32.84 14.98 13.54 2.32 0.60 0.0 100.14 TOTAL HOURS OF VALID WIND OBSERVATIONS 2218 TOTAL HOURS OF OBSERVATIONS 2232 RECOVERABILITY PERCENTAGE 99.4 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 5.0 MPH

BFN-16 TABLE 2.3-16 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS JUNE (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.28 2.75 1.58 1.35 2.56 0.47 0.0 0.05 9.04 NNE 0.37 2.28 1.68 1.07 2.23 0.65 0.0 0.0 8.28 NE 0.42 1.40 0.93 0.42 0.42 0.19 0.0 0.0 3.78 ENE 0.33 2.09 0.74 0.09 0.0 0.0 0.0 0.0 3.25 E 0.09 1.58 1.58 0.05 0.0 0.0 0.0 0.0 3.30 ESE 0.0 2.05 1.96 0.14 0.0 0.0 0.0 0.0 4.15 SE 0.28 7.64 5.31 1.30 0.14 0.0 0.0 0.0 14.67 SSE 0.19 3.40 2.37 0.37 0.0 0.0 0.0 0.0 6.33 S 0.19 3.82 3.26 0.70 0.05 0.0 0.0 0.0 8.02 SSW 0.23 2.65 0.79 0.05 0.0 0.0 0.0 0.0 3.72 SW 0.05 1.72 1.30 0.14 0.0 0.0 0.0 0.0 3.21 WSW 0.0 2.47 3.21 1.49 0.51 0.0 0.0 0.0 7.68 W 0.0 1.82 3.35 2.42 1.72 0.0 0.0 0.0 9.31 WNW 0.09 0.33 0.98 0.93 2.14 0.23 0.0 0.0 4.70 NW 0.0 0.37 0.65 1.16 1.91 0.19 0.0 0.0 4.28 NNW 0.23 1.77 1.30 2.05 0.70 0.09 0.0 0.0 6.14 SUBTOTAL 2.75 38.14 30.99 13.73 12.38 1.82 0.0 0.05 99.86 TOTAL HOURS OF VALID WIND OBSERVATIONS 2148 TOTAL HOURS OF OBSERVATIONS 2160 RECOVERABILITY PERCENTAGE 99.4 TOTAL HOURS CALM 3 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 4.6 MPH

BFN-16 TABLE 2.3-17 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS JULY (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.13 1.70 2.11 1.03 0.72 0.04 0.0 0.0 5.73 NNE 0.13 2.69 3.14 1.48 2.24 0.09 0.04 0.0 9.81 NE 0.09 1.30 1.26 0.99 0.85 0.0 0.0 0.0 4.49 ENE 0.04 2.11 1.57 0.22 0.04 0.0 0.0 0.0 3.98 E 0.0 1.26 2.47 0.49 0.36 0.0 0.0 0.0 4.58 ESE 0.0 1.03 2.24 1.61 0.18 0.09 0.0 0.0 5.15 SE 0.22 4.53 6.32 3.81 1.08 0.09 0.0 0.0 16.05 SSE 0.13 3.36 3.63 0.22 0.13 0.0 0.0 0.0 7.47 S 0.13 4.39 5.25 0.94 0.27 0.04 0.0 0.0 11.02 SSW 0.0 2.65 1.17 0.04 0.13 0.0 0.0 0.0 3.99 SW 0.09 1.57 1.79 0.22 0.0 0.0 0.0 0.0 3.67 WSW 0.0 2.11 4.08 1.08 0.67 0.0 0.0 0.0 7.94 W 0.0 1.48 2.74 2.20 0.90 0.0 0.0 0.0 7.32 WNW 0.04 0.31 1.39 0.76 1.26 0.27 0.0 0.0 4.03 NW 0.04 0.13 0.40 0.36 0.90 0.22 0.0 0.0 2.05 NNW 0.18 0.54 0.45 0.81 0.58 0.09 0.0 0.0 2.65 SUBTOTAL 1.22 31.16 40.01 16.26 10.31 0.93 0.04 0.0 99.93 TOTAL HOURS OF VALID WIND OBSERVATIONS 2230 TOTAL HOURS OF OBSERVATIONS 2232 RECOVERABILITY PERCENTAGE 99.9 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 4.7 MPH

BFN-16 TABLE 2.3-18 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS AUGUST (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.18 2.34 1.80 1.53 1.21 0.09 0.0 0.0 7.15 NNE 0.36 2.97 3.42 2.20 0.90 0.13 0.04 0.0 10.02 NE 0.27 2.07 1.35 0.63 0.31 0.0 0.0 0.0 4.63 ENE 0.04 2.43 1.26 0.40 0.04 0.0 0.0 0.0 4.17 E 0.13 2.56 1.80 0.13 0.0 0.0 0.0 0.0 4.62 ESE 0.0 2.02 2.07 0.90 0.13 0.0 0.0 0.0 5.12 SE 0.18 8.00 10.88 2.74 0.09 0.0 0.0 0.0 21.89 SSE 0.18 4.09 4.00 0.36 0.04 0.0 0.0 0.0 8.67 S 0.22 4.32 4.59 0.72 0.45 0.0 0.0 0.0 10.30 SSW 0.04 2.61 0.94 0.18 0.0 0.0 0.0 0.0 3.77 SW 0.0 0.99 0.85 0.18 0.04 0.0 0.0 0.0 2.06 WSW 0.09 1.35 2.07 0.58 0.04 0.0 0.0 0.0 4.13 W 0.04 0.76 1.71 1.71 0.58 0.0 0.0 0.0 4.80 WNW 0.0 0.40 0.72 0.99 0.45 0.04 0.0 0.0 2.60 NW 0.0 0.54 0.36 0.36 0.63 0.09 0.0 0.0 1.98 NNW 0.31 0.90 1.21 0.90 0.58 0.09 0.0 0.0 3.99 SUBTOTAL 2.04 38.35 39.03 14.51 5.49 0.44 0.04 0.0 99.90 TOTAL HOURS OF VALID WIND OBSERVATIONS 2224 TOTAL HOURS OF OBSERVATIONS 2232 RECOVERABILITY PERCENTAGE 99.6 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 4.1 MPH

BFN-16 TABLE 2.3-19 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS SEPT. (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.15 2.64 2.74 2.79 2.79 0.40 0.05 0.0 11.56 NNE 0.10 2.99 4.98 2.94 3.33 0.75 0.0 0.0 15.09 NE 0.10 1.49 2.49 1.89 1.49 0.20 0.0 0.0 7.66 ENE 0.20 3.04 2.59 1.29 0.45 0.20 0.05 0.0 7.82 E 0.0 2.24 3.93 1.00 0.40 0.0 0.0 0.0 7.57 ESE 0.05 2.39 3.68 1.79 0.25 0.0 0.0 0.0 8.16 SE 0.35 3.88 6.57 3.14 0.30 0.0 0.0 0.0 14.24 SSE 0.10 1.54 3.14 0.45 0.20 0.20 0.0 0.0 5.63 S 0.05 1.69 3.04 0.30 0.0 0.0 0.0 0.0 5.08 SSW 0.05 0.45 0.05 0.25 0.0 0.0 0.0 0.0 0.80 SW 0.05 0.40 0.80 0.15 0.0 0.0 0.0 0.0 1.40 WSW 0.0 0.35 0.60 0.0 0.20 0.0 0.0 0.0 1.15 W 0.0 0.25 1.19 0.90 0.30 0.05 0.0 0.0 2.69 WNW 0.0 0.30 0.65 0.55 0.35 0.20 0.0 0.0 2.05 NW 0.10 0.30 0.50 0.75 1.05 0.15 0.0 0.05 2.90 NNW 0.15 1.74 1.74 1.34 0.95 0.15 0.0 0.05 6.12 SUBTOTAL 1.45 25.69 38.69 19.53 12.06 2.30 0.10 0.10 99.92 TOTAL HOURS OF VALID WIND OBSERVATIONS 2009 TOTAL HOURS OF OBSERVATIONS 2160 RECOVERABILITY PERCENTAGE 93.0 TOTAL HOURS CALM 3 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 5.1 MPH

BFN-16 TABLE 2.3-20 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS OCTOBER (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.18 2.38 3.64 1.75 2.43 0.90 0.0 0.0 11.28 NNE 0.09 2.79 3.14 1.80 1.93 0.18 0.0 0.0 9.93 NE 0.27 1.44 0.99 0.54 0.67 0.0 0.0 0.0 3.91 ENE 0.13 2.61 0.76 0.18 0.09 0.0 0.0 0.0 3.77 E 0.18 3.19 2.70 0.13 0.0 0.0 0.0 0.0 6.20 ESE 0.0 2.34 2.25 1.21 0.67 0.0 0.0 0.0 6.47 SE 0.09 5.03 4.99 1.89 1.48 0.04 0.0 0.0 13.52 SSE 0.31 2.92 3.37 0.72 0.31 0.04 0.0 0.0 7.67 S 0.0 2.29 3.32 1.44 0.31 0.0 0.0 0.0 7.36 SSW 0.27 0.63 0.22 0.27 0.0 0.0 0.0 0.0 1.39 SW 0.09 0.49 0.36 0.22 0.04 0.0 0.0 0.0 1.20 WSW 0.0 0.49 1.03 0.81 0.49 0.0 0.0 0.0 2.82 W 0.13 0.31 1.08 1.03 1.26 0.04 0.0 0.0 3.85 WNW 0.04 0.58 0.76 0.76 1.71 0.45 0.0 0.0 4.30 NW 0.18 0.63 0.90 0.81 2.07 1.26 0.0 0.0 5.85 NNW 0.09 1.66 2.02 2.07 3.32 1.21 0.0 0.0 10.37 SUBTOTAL 2.05 29.78 31.53 15.63 16.78 4.12 0.0 0.0 99.89 TOTAL HOURS OF VALID WIND OBSERVATIONS 2226 TOTAL HOURS OF OBSERVATIONS 2232 RECOVERABILITY PERCENTAGE 99.7 TOTAL HOURS CALM 1 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 5.3 MPH

BFN-16 TABLE 2.3-21 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS NOVEMBER (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.33 1.73 2.10 2.19 2.89 0.23 0.0 0.0 9.47 NNE 0.37 2.38 2.71 3.22 3.55 0.42 0.0 0.0 12.65 NE 0.09 1.26 2.10 1.87 1.73 0.09 0.0 0.0 7.14 ENE 0.14 1.96 1.26 0.61 0.61 0.05 0.0 0.0 4.63 E 0.0 2.89 1.35 0.51 0.14 0.0 0.0 0.0 4.89 ESE 0.0 1.35 0.84 1.77 0.65 0.0 0.0 0.0 4.61 SE 0.47 5.74 3.73 2.61 1.12 0.0 0.0 0.0 13.67 SSE 0.28 3.55 3.03 2.43 1.63 0.05 0.0 0.0 10.97 S 0.19 1.31 1.77 1.31 1.63 0.37 0.05 0.0 6.63 SSW 0.09 0.37 0.42 0.0 0.05 0.0 0.0 0.0 0.93 SW 0.09 0.42 0.14 0.23 0.09 0.0 0.0 0.0 0.97 WSW 0.09 0.51 1.03 0.75 0.37 0.19 0.0 0.0 2.94 W 0.23 0.56 1.03 0.79 0.70 0.51 0.09 0.0 3.91 WNW 0.05 0.65 0.93 0.79 1.03 0.89 0.14 0.0 4.48 NW 0.09 0.42 0.23 0.47 1.35 1.45 0.14 0.0 4.15 NNW 0.33 1.17 1.68 1.31 2.71 0.61 0.0 0.0 7.81 SUBTOTAL 2.84 26.27 24.35 20.86 20.25 4.86 0.42 0.0 99.85 TOTAL HOURS OF VALID WIND OBSERVATIONS 2143 TOTAL HOURS OF OBSERVATIONS 2160 RECOVERABILITY PERCENTAGE 99.2 TOTAL HOURS CALM 3 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 5.8 MPH

BFN-16 TABLE 2.3-22 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS DECEMBER (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.09 0.90 1.13 1.04 2.75 0.63 0.14 0.0 6.68 NNE 0.09 1.04 1.40 1.49 2.48 0.23 0.0 0.0 6.73 NE 0.14 1.31 1.08 0.86 0.77 0.0 0.0 0.0 4.16 ENE 0.0 1.04 0.90 0.27 0.0 0.0 0.0 0.0 2.21 E 0.14 1.35 1.35 0.36 0.09 0.0 0.0 0.0 3.29 ESE 0.09 1.62 1.31 0.68 0.09 0.0 0.0 0.0 3.79 SE 0.68 3.42 5.67 5.00 1.58 0.0 0.0 0.0 16.35 SSE 0.18 3.38 4.05 3.02 2.16 0.23 0.05 0.0 13.07 S 0.14 2.07 3.38 2.52 3.47 1.04 0.09 0.0 12.71 SSW 0.09 0.86 0.81 0.41 0.36 0.09 0.0 0.0 2.62 SW 0.05 0.14 0.50 0.23 0.0 0.0 0.0 0.0 0.92 WSW 0.0 0.59 0.95 0.36 0.50 0.50 0.0 0.0 2.90 W 0.0 0.09 0.81 1.04 1.53 0.27 0.0 0.0 3.74 WNW 0.05 0.27 0.68 0.50 2.52 2.30 0.59 0.05 6.96 NW 0.09 0.41 0.54 0.50 2.03 1.85 0.50 0.05 5.97 NNW 0.05 0.23 1.08 1.44 3.51 1.67 0.14 0.0 8.12 SUBTOTAL 1.88 18.72 25.64 19.72 23.84 8.81 1.51 0.10 100.22 TOTAL HOURS OF VALID WIND OBSERVATIONS 2221 TOTAL HOURS OF OBSERVATIONS 2232 RECOVERABILITY PERCENTAGE 99.5 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL MEAN WIND SPEED = 6.8 MPH

BFN-16 TABLE 2.3-23 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T< = -1.9 C/100 M)

JAN 1, 77 - DEC 31, 79 WIND WIND SPEED (MPH)

DIRECTION 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 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NNE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ENE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 E 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ESE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SSE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 S 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SSW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SW 0.0 0.0 0.0 0.01 0.0 0.0 0.0 0.0 0.01 WSW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 W 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 WNW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NNW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SUBTOTAL 0.0 0.0 0.0 0.01 0.0 0.0 0.0 0.0 0.01 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 25729 TOTAL HOURS OF STABILITY CLASS A 6 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 6 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 9.5 MPH

BFN-16 TABLE 2.3-24 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA-T< = -1.7 C/100 M)

JAN 1, 77 - DEC 31, 79 WIND WIND SPEED (MPH)

DIRECTION 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 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NNE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ENE 0.0 0.0 0.0 0.0 0.01 0.0 0.0 0.0 0.01 E 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ESE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SE 0.0 0.0 0.01 0.0 0.0 0.0 0.0 0.0 0.01 SSE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 S 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SSW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SW 0.0 0.0 0.0 0.01 0.01 0.0 0.0 0.0 0.02 WSW 0.0 0.0 0.0 0.0 0.0 0.01 0.0 0.0 0.01 W 0.0 0.0 0.0 0.0 0.0 0.02 0.01 0.0 0.03 WNW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NNW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SUBTOTAL 0.0 0.0 0.01 0.01 0.02 0.03 0.01 0.0 0.08 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 25729 TOTAL HOURS OF STABILITY CLASS B 30 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 30 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 10.4 MPH

BFN-16 TABLE 2.3-25 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA-T < = -1.5 C/100 M)

JAN 1, 77 - DEC 31, 79 WIND WIND SPEED (MPH)

DIRECTION 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 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NNE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ENE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 E 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ESE 0.0 0.0 0.0 0.0 0.02 0.01 0.0 0.0 0.03 SE 0.0 0.01 0.03 0.02 0.01 0.0 0.0 0.0 0.07 SSE 0.0 0.01 0.01 0.01 0.0 0.0 0.0 0.0 0.03 S 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SSW 0.0 0.0 0.01 0.0 0.0 0.0 0.0 0.0 0.01 SW 0.0 0.01 0.02 0.04 0.04 0.02 0.0 0.0 0.13 WSW 0.0 0.01 0.01 0.03 0.04 0.02 0.0 0.0 0.11 W 0.0 0.0 0.0 0.0 0.03 0.03 0.02 0.04 0.12 WNW 0.0 0.0 0.0 0.01 0.02 0.03 0.0 0.01 0.07 NW 0.0 0.0 0.0 0.0 0.0 0.03 0.0 0.0 0.03 NNW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SUBTOTAL 0.0 0.04 0.08 0.11 0.16 0.14 0.02 0.05 0.60 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 25729 TOTAL HOURS OF STABILITY CLASS C 164 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 164 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 11.0 MPH

BFN-16 TABLE 2.3-26 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA-T< = -0.5 C/100 M)

JAN 1, 77 - DEC 31, 79 WIND WIND SPEED (MPH)

DIRECTION 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 0.01 0.11 0.30 0.48 1.54 1.51 0.38 0.05 4.38 NNE 0.0 0.09 0.22 0.43 1.65 1.42 0.15 0.04 4.00 NE 0.0 0.06 0.21 0.41 1.18 0.48 0.04 0.02 2.40 ENE 0.01 0.09 0.21 0.21 0.42 0.15 0.05 0.02 1.16 E 0.0 0.11 0.24 0.20 0.25 0.12 0.02 0.0 0.94 ESE 0.0 0.12 0.28 0.32 0.81 0.64 0.20 0.06 2.43 SE 0.01 0.22 0.71 0.75 1.42 1.39 0.81 0.32 5.63 SSE 0.0 0.20 0.69 0.56 1.39 1.34 0.58 0.28 5.04 S 0.0 0.25 0.49 0.48 1.33 1.24 0.71 0.31 4.81 SSW 0.0 0.20 0.44 0.39 0.86 0.82 0.39 0.16 3.26 SW 0.0 0.27 0.43 0.37 0.68 0.65 0.26 0.10 2.76 WSW 0.0 0.15 0.53 0.44 0.59 0.53 0.24 0.13 2.61 W 0.0 0.13 0.50 0.60 1.25 0.65 0.35 0.30 3.78 WNW 0.0 0.07 0.27 0.49 1.63 1.27 0.67 0.28 4.68 NW 0.01 0.07 0.28 0.54 1.42 1.70 0.86 0.28 5.16 NNW 0.0 0.08 0.18 0.31 1.31 1.70 0.59 0.13 4.30 SUBTOTAL 0.04 2.22 5.98 6.98 17.73 15.61 6.30 2.48 57.34 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 25729 TOTAL HOURS OF STABILITY CLASS D 14807 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 14557 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 12.1 MPH

BFN-16 TABLE 2.3-27 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA-T< = 1.5 C/100 M)

JAN 1, 77 - DEC 31, 79 WIND WIND SPEED (MPH)

DIRECTION 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 0.0 0.05 0.07 0.13 0.45 0.77 0.15 0.0 1.62 NNE 0.0 0.04 0.07 0.12 0.67 0.88 0.17 0.0 1.95 NE 0.0 0.04 0.10 0.15 0.77 0.87 0.26 0.0 2.19 ENE 0.0 0.04 0.08 0.12 0.45 0.39 0.11 0.02 1.21 E 0.0 0.09 0.16 0.19 0.47 0.17 0.05 0.01 1.14 ESE 0.01 0.07 0.17 0.21 0.63 0.70 0.17 0.03 1.99 SE 0.0 0.09 0.43 0.39 1.35 1.50 0.71 0.37 4.84 SSE 0.0 0.17 0.42 0.51 1.14 1.01 0.57 0.25 4.07 S 0.01 0.09 0.34 0.45 0.89 0.95 0.27 0.09 3.09 SSW 0.0 0.09 0.14 0.20 0.59 0.61 0.20 0.01 1.84 SW 0.01 0.07 0.14 0.17 0.56 0.64 0.10 0.03 1.72 WSW 0.01 0.08 0.11 0.14 0.42 0.34 0.07 0.01 1.18 W 0.0 0.07 0.13 0.18 0.39 0.30 0.04 0.0 1.11 WNW 0.01 0.07 0.15 0.15 0.35 0.20 0.04 0.0 0.97 NW 0.0 0.09 0.15 0.14 0.33 0.27 0.07 0.0 1.05 NNW 0.0 0.10 0.07 0.09 0.30 0.35 0.09 0.0 1.00 SUBTOTAL 0.05 1.25 2.73 3.34 9.76 9.95 3.07 0.82 30.97 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 25729 TOTAL HOURS OF STABILITY CLASS E 7965 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 7855 TOTAL HOURS CALM 1 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 12.0 MPH

BFN-16 TABLE 2.3-28 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F (1.5< DELTA-T< = 4.0 C/100 M)

JAN 1, 77 - DEC 31, 79 WIND WIND SPEED (MPH)

DIRECTION 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 0.0 0.02 0.02 0.02 0.09 0.18 0.06 0.0 0.39 NNE 0.0 0.0 0.04 0.02 0.11 0.36 0.17 0.0 0.70 NE 0.0 0.01 0.02 0.04 0.17 0.40 0.24 0.0 0.88 ENE 0.0 0.01 0.02 0.03 0.22 0.34 0.16 0.0 0.78 E 0.0 0.01 0.06 0.05 0.24 0.11 0.0 0.0 0.47 ESE 0.0 0.04 0.06 0.10 0.29 0.27 0.05 0.0 0.81 SE 0.0 0.02 0.08 0.14 0.39 0.33 0.03 0.0 0.99 SSE 0.0 0.02 0.06 0.09 0.30 0.21 0.02 0.0 0.70 S 0.0 0.04 0.05 0.08 0.17 0.17 0.01 0.0 0.52 SSW 0.0 0.02 0.06 0.06 0.19 0.29 0.10 0.0 0.72 SW 0.0 0.02 0.03 0.05 0.18 0.24 0.06 0.0 0.58 WSW 0.0 0.01 0.03 0.06 0.09 0.14 0.0 0.0 0.33 W 0.01 0.0 0.02 0.02 0.09 0.04 0.0 0.0 0.18 WNW 0.0 0.02 0.03 0.03 0.04 0.04 0.0 0.0 0.16 NW 0.0 0.02 0.05 0.02 0.04 0.0 0.0 0.0 0.13 NNW 0.0 0.03 0.02 0.02 0.03 0.07 0.0 0.0 0.17 SUBTOTAL 0.01 0.29 0.65 0.83 2.64 3.19 0.90 0.0 8.51 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 25729 TOTAL HOURS OF STABILITY CLASS F 2183 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 2167 TOTAL HOURS CALM 1 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 12.1 MPH

BFN-16 TABLE 2.3-29 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T> 4.0 C/100 M)

JAN 1, 77 - DEC 31, 79 WIND WIND SPEED (MPH)

DIRECTION 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 0.01 0.01 0.0 0.0 0.02 0.02 0.01 0.0 0.07 NNE 0.0 0.0 0.0 0.0 0.05 0.06 0.02 0.0 0.13 NE 0.0 0.01 0.0 0.01 0.04 0.10 0.05 0.0 0.21 ENE 0.0 0.0 0.01 0.01 0.07 0.08 0.03 0.0 0.20 E 0.0 0.01 0.01 0.02 0.05 0.03 0.01 0.0 0.13 ESE 0.0 0.01 0.02 0.02 0.06 0.04 0.01 0.0 0.16 SE 0.0 0.0 0.01 0.05 0.12 0.03 0.0 0.0 0.21 SSE 0.0 0.0 0.03 0.04 0.18 0.06 0.0 0.0 0.31 S 0.0 0.01 0.01 0.06 0.12 0.04 0.0 0.0 0.24 SSW 0.0 0.0 0.01 0.03 0.08 0.05 0.01 0.0 0.18 SW 0.0 0.0 0.02 0.03 0.08 0.05 0.04 0.0 0.22 WSW 0.0 0.0 0.01 0.01 0.02 0.02 0.0 0.0 0.06 W 0.0 0.0 0.01 0.0 0.01 0.0 0.0 0.0 0.02 WNW 0.0 0.02 0.01 0.0 0.0 0.0 0.0 0.0 0.03 NW 0.0 0.0 0.02 0.01 0.0 0.0 0.0 0.0 0.03 NNW 0.0 0.01 0.01 0.0 0.0 0.0 0.0 0.0 0.02 SUBTOTAL 0.01 0.08 0.18 0.29 0.90 0.58 0.18 0.0 2.22 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 25729 TOTAL HOURS OF STABILITY CLASS G 574 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 568 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 11.0 MPH

BFN-16 TABLE 2.3-30 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS JAN 1, 77 - DEC 31, 79 WIND WIND SPEED (MPH)

DIRECTION 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 0.02 0.19 0.38 0.64 2.07 2.47 0.61 0.06 6.44 NNE 0.0 0.13 0.33 0.60 2.46 2.69 0.50 0.04 6.75 NE 0.0 0.12 0.35 0.64 2.16 1.85 0.58 0.02 5.72 ENE 0.02 0.14 0.32 0.36 1.15 0.95 0.34 0.04 3.32 E 0.0 0.22 0.47 0.45 0.99 0.43 0.08 0.01 2.65 ESE 0.01 0.23 0.53 0.66 1.79 1.63 0.42 0.09 5.36 SE 0.02 0.36 1.26 1.36 3.25 3.20 1.54 0.69 11.68 SSE 0.01 0.38 1.20 1.22 2.97 2.59 1.16 0.59 10.12 S 0.02 0.40 0.90 1.05 2.53 2.40 1.03 0.43 8.76 SSW 0.0 0.31 0.65 0.69 1.73 1.77 0.73 0.19 6.07 SW 0.02 0.38 0.66 0.69 1.55 1.62 0.50 0.14 5.56 WSW 0.01 0.26 0.69 0.68 1.15 1.05 0.36 0.17 4.37 W 0.02 0.20 0.66 0.81 1.76 1.04 0.42 0.35 5.26 WNW 0.01 0.17 0.46 0.69 2.03 1.54 0.76 0.30 5.96 NW 0.02 0.19 0.49 0.70 1.80 2.01 0.96 0.28 6.45 NNW 0.01 0.22 0.28 0.41 1.66 2.13 0.70 0.13 5.54 SUBTOTAL 0.19 3.90 9.63 11.65 31.05 29.37 10.69 3.53 100.01 TOTAL HOURS OF VALID WIND OBSERVATIONS 25784 TOTAL HOURS OF OBSERVATIONS 26280 RECOVERABILITY PERCENTAGE 98.1 TOTAL HOURS CALM 2 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 12.0 MPH

BFN-16 TABLE 2.3-31 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS JANUARY (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.0 0.34 0.58 0.87 1.69 1.74 0.10 0.0 5.32 NNE 0.0 0.15 0.63 1.21 2.90 1.21 0.0 0.0 6.10 NE 0.0 0.05 0.39 0.92 2.32 0.73 0.0 0.0 4.41 ENE 0.0 0.05 0.58 0.44 1.16 0.48 0.0 0.0 2.71 E 0.0 0.19 0.48 0.63 0.87 0.05 0.0 0.0 2.22 ESE 0.0 0.10 0.29 0.92 1.84 1.89 0.34 0.05 5.43 SE 0.0 0.10 0.34 1.16 2.51 2.80 2.61 1.06 10.58 SSE 0.0 0.15 0.29 0.77 1.60 2.27 0.92 0.29 6.29 S 0.0 0.19 0.29 0.58 1.89 1.64 0.58 0.10 5.27 SSW 0.0 0.19 0.24 0.15 0.48 0.44 0.05 0.0 1.55 SW 0.0 0.15 0.19 0.29 0.77 0.58 0.05 0.15 2.18 WSW 0.0 0.24 0.29 0.34 0.63 0.34 0.39 0.44 2.67 W 0.0 0.19 0.29 0.44 1.60 1.55 0.97 1.55 6.59 WNW 0.0 0.10 0.44 0.29 2.66 4.55 1.93 1.50 11.47 NW 0.05 0.19 0.73 0.87 2.13 5.95 3.53 0.77 14.22 NNW 0.0 0.34 0.15 0.73 3.34 5.90 1.74 0.87 13.07 SUBTOTAL 0.05 2.72 6.20 10.61 28.39 32.12 13.21 6.78 100.08 TOTAL HOURS OF VALID WIND OBSERVATIONS 2068 TOTAL HOURS OF OBSERVATIONS 2232 RECOVERABILITY PERCENTAGE 92.7 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 13.4 MPH

BFN-16 TABLE 2.3-32 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS FEBRUARY (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.0 0.15 0.51 1.02 3.63 3.78 1.07 0.0 10.16 NNE 0.0 0.20 0.20 0.66 4.19 4.55 0.26 0.05 10.11 NE 0.0 0.15 0.51 0.77 2.91 1.53 0.05 0.05 5.97 ENE 0.0 0.26 0.36 0.56 1.33 1.12 0.10 0.0 3.73 E 0.0 0.05 0.61 0.56 1.43 0.66 0.10 0.0 3.41 ESE 0.0 0.15 0.51 0.46 1.18 1.18 0.0 0.05 3.53 SE 0.0 0.36 0.66 1.07 1.38 1.99 0.56 0.15 6.17 SSE 0.0 0.05 0.61 0.41 1.84 2.15 1.12 1.12 7.30 S 0.05 0.31 0.46 0.46 1.79 1.58 1.23 0.66 6.54 SSW 0.0 0.15 0.46 0.56 1.64 1.48 0.87 0.31 5.47 SW 0.0 0.26 0.36 0.41 1.23 1.99 0.92 0.41 5.58 WSW 0.0 0.20 0.36 0.31 0.41 0.92 1.02 0.82 4.04 W 0.0 0.10 0.20 0.31 0.92 0.92 0.87 0.41 3.73 WNW 0.0 0.0 0.36 0.41 1.64 1.89 1.53 0.46 6.29 NW 0.05 0.20 0.72 0.61 2.10 3.17 1.69 0.77 9.31 NNW 0.0 0.20 0.26 0.61 3.22 2.71 1.43 0.15 8.58 SUBTOTAL 0.10 2.79 7.15 9.19 30.84 31.62 12.82 5.41 99.92 TOTAL HOURS OF VALID WIND OBSERVATIONS 1956 TOTAL HOURS OF OBSERVATIONS 2016 RECOVERABILITY PERCENTAGE 97.0 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 13.1 MPH

BFN-16 TABLE 2.3-33 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS MARCH (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.0 0.14 0.23 0.41 1.04 1.99 1.27 0.05 5.13 NNE 0.0 0.14 0.23 0.27 2.08 2.35 0.41 0.0 5.48 NE 0.05 0.09 0.18 0.54 1.90 1.90 0.50 0.0 5.16 ENE 0.0 0.14 0.23 0.09 1.00 0.81 0.23 0.0 2.50 E 0.0 0.05 0.18 0.23 0.68 0.23 0.0 0.0 1.37 ESE 0.0 0.14 0.27 0.36 1.40 1.36 0.59 0.32 4.44 SE 0.0 0.05 0.59 1.09 2.63 2.81 1.54 2.94 11.65 SSE 0.0 0.14 0.72 0.81 2.81 2.49 1.49 2.49 10.95 S 0.0 0.14 0.27 0.72 1.63 4.03 2.04 0.86 9.69 SSW 0.0 0.14 0.36 0.32 1.67 3.62 1.95 0.32 8.38 SW 0.0 0.05 0.59 0.45 1.18 1.36 0.41 0.32 4.36 WSW 0.0 0.27 0.45 0.50 0.91 2.08 0.77 0.27 5.25 W 0.0 0.0 0.54 0.41 1.67 1.40 0.91 0.45 5.38 WNW 0.0 0.09 0.27 0.41 1.72 2.90 1.22 0.23 6.84 NW 0.0 0.23 0.23 0.77 2.13 3.44 0.91 0.45 8.16 NNW 0.0 0.32 0.09 0.23 1.18 2.44 1.04 0.05 5.35 SUBTOTAL 0.05 2.13 5.43 7.61 25.63 35.21 15.28 8.75 100.09 TOTAL HOURS OF VALID WIND OBSERVATIONS 2209 TOTAL HOURS OF OBSERVATIONS 2232 RECOVERABILITY PERCENTAGE 99.0 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 14.6 MPH

BFN-16 TABLE 2.3-34 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS APRIL (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.05 0.19 0.19 0.47 1.40 1.45 0.28 0.19 4.22 NNE 0.0 0.14 0.09 0.47 1.31 1.87 0.47 0.0 4.35 NE 0.0 0.19 0.37 0.70 2.80 2.19 0.75 0.05 7.05 ENE 0.0 0.05 0.23 0.19 1.59 1.31 0.42 0.05 3.84 E 0.0 0.09 0.47 0.65 1.17 0.37 0.09 0.0 2.84 ESE 0.0 0.37 0.75 1.07 1.73 0.56 0.61 0.05 5.14 SE 0.0 0.47 1.96 1.35 2.80 2.47 2.33 0.79 12.17 SSE 0.0 0.47 1.45 0.93 2.29 2.01 1.59 0.84 9.58 S 0.05 0.61 0.98 0.89 1.49 1.96 1.63 0.33 7.94 SSW 0.0 0.19 0.65 0.65 1.68 1.87 2.33 0.23 7.60 SW 0.0 0.47 0.75 0.79 1.03 2.38 1.26 0.09 6.77 WSW 0.0 0.23 0.51 0.42 0.93 1.73 0.98 0.0 4.80 W 0.0 0.05 0.37 0.47 1.35 1.31 0.75 0.84 5.14 WNW 0.0 0.19 0.47 0.51 2.43 1.35 1.12 0.37 6.44 NW 0.0 0.14 0.28 0.51 2.10 2.10 1.54 0.19 6.86 NNW 0.0 0.19 0.23 0.33 1.12 2.57 0.84 0.0 5.28 SUBTOTAL 0.10 4.04 9.75 10.40 27.22 27.50 16.99 4.02 100.02 TOTAL HOURS OF VALID WIND OBSERVATIONS 2142 TOTAL HOURS OF OBSERVATIONS 2160 RECOVERABILITY PERCENTAGE 99.2 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 12.9 MPH

BFN-16 TABLE 2.3-35 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS MAY (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.0 0.18 0.36 0.68 2.17 1.13 0.23 0.0 4.75 NNE 0.0 0.14 0.36 0.32 2.48 2.80 0.50 0.0 6.60 NE 0.0 0.36 0.23 0.41 1.94 1.31 1.04 0.0 5.29 ENE 0.0 0.23 0.36 0.27 0.95 0.63 0.59 0.0 3.03 E 0.0 0.45 0.81 0.59 1.49 0.68 0.09 0.0 4.11 ESE 0.0 0.36 0.45 0.81 2.98 1.99 0.36 0.05 7.00 SE 0.0 0.36 1.58 2.03 3.48 4.47 0.50 0.05 12.47 SSE 0.0 0.45 1.58 1.45 2.30 1.81 1.08 0.14 8.81 S 0.09 0.59 1.08 1.08 3.03 2.03 1.22 0.18 9.30 SSW 0.0 0.50 0.99 0.95 1.63 1.81 0.32 0.18 6.38 SW 0.05 0.54 0.90 0.54 2.26 2.26 0.45 0.09 7.09 WSW 0.0 0.18 0.77 1.40 1.13 1.04 0.27 0.0 4.79 W 0.05 0.32 0.50 1.13 1.94 0.72 0.50 0.18 5.34 WNW 0.0 0.27 0.45 0.95 2.35 0.86 0.54 0.54 5.96 NW 0.0 0.09 0.77 0.77 1.76 1.08 0.45 0.09 5.01 NNW 0.0 0.41 0.45 0.32 1.26 0.95 0.63 0.09 4.11 SUBTOTAL 0.19 5.43 11.64 13.70 33.15 25.57 8.77 1.59 100.04 TOTAL HOURS OF VALID WIND OBSERVATIONS 2214 TOTAL HOURS OF OBSERVATIONS 2232 RECOVERABILITY PERCENTAGE 99.2 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 10.9 MPH

BFN-16 TABLE 2.3-36 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS JUNE (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.05 0.23 0.19 0.65 2.71 2.38 1.03 0.14 7.38 NNE 0.0 0.14 0.19 0.37 2.24 2.06 0.79 0.05 5.84 NE 0.0 0.09 0.42 0.47 1.36 1.31 0.56 0.0 4.21 ENE 0.05 0.05 0.19 0.33 0.98 0.75 0.23 0.0 2.58 E 0.05 0.37 0.47 0.47 0.51 0.09 0.0 0.0 1.96 ESE 0.0 0.37 0.56 0.70 0.93 0.65 0.0 0.0 3.21 SE 0.05 0.47 1.68 1.50 3.32 2.62 0.23 0.0 9.87 SSE 0.0 0.47 1.36 1.50 2.38 1.68 0.09 0.0 7.48 S 0.0 0.70 1.68 1.36 2.71 2.10 0.23 0.0 8.78 SSW 0.0 0.37 1.17 0.98 2.01 1.96 0.33 0.0 6.82 SW 0.0 1.07 1.36 1.40 2.85 1.64 0.28 0.0 8.60 WSW 0.0 0.61 1.17 1.07 2.34 2.20 0.14 0.0 7.53 W 0.0 0.37 1.45 1.54 3.79 1.82 0.0 0.0 8.97 WNW 0.05 0.19 0.70 1.59 3.69 0.89 0.19 0.0 7.30 NW 0.05 0.42 0.79 1.03 2.43 1.03 0.05 0.0 5.80 NNW 0.0 0.28 0.28 0.56 1.68 0.84 0.05 0.0 3.69 SUBTOTAL 0.30 6.20 13.66 15.52 35.93 24.02 4.20 0.19 100.02 TOTAL HOURS OF VALID WIND OBSERVATIONS 2140 TOTAL HOURS OF OBSERVATIONS 2160 RECOVERABILITY PERCENTAGE 99.1 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 9.8 MPH

BFN-16 TABLE 2.3-37 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS JULY (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.0 0.18 0.32 0.59 1.68 0.36 0.0 0.0 3.13 NNE 0.0 0.05 0.23 0.45 2.45 2.91 0.27 0.09 6.45 NE 0.0 0.09 0.05 0.59 1.45 2.36 0.14 0.0 4.68 ENE 0.0 0.09 0.36 0.41 1.18 1.09 0.41 0.0 3.54 E 0.0 0.09 0.32 0.50 1.14 0.45 0.23 0.05 2.78 ESE 0.05 0.23 0.64 0.45 1.91 2.27 0.05 0.09 5.69 SE 0.0 0.36 1.95 1.41 2.95 3.00 1.14 0.27 11.08 SSE 0.0 0.45 1.91 1.36 3.23 2.64 0.73 0.09 10.41 S 0.0 0.55 1.32 2.09 3.73 2.04 0.09 0.23 10.05 SSW 0.0 0.59 0.77 1.04 2.54 1.77 0.23 0.09 7.03 SW 0.0 0.45 0.95 0.95 2.82 2.32 0.36 0.05 7.90 WSW 0.0 0.41 1.86 1.95 2.41 0.95 0.18 0.0 7.76 W 0.0 0.18 1.73 1.86 3.95 0.82 0.05 0.0 8.59 WNW 0.0 0.18 0.45 0.91 2.50 0.55 0.09 0.0 4.68 NW 0.0 0.14 0.23 0.73 1.82 0.59 0.14 0.0 3.65 NNW 0.05 0.14 0.23 0.41 1.23 0.50 0.05 0.0 2.61 SUBTOTAL 0.10 4.18 13.32 15.70 36.99 24.62 4.16 0.96 100.03 TOTAL HOURS OF VALID WIND OBSERVATIONS 2201 TOTAL HOURS OF OBSERVATIONS 2232 RECOVERABILITY PERCENTAGE 98.6 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 10.2 MPH

BFN-16 TABLE 2.3-38 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS AUGUST (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.0 0.09 0.77 0.59 1.67 1.44 0.14 0.0 4.70 NNE 0.0 0.14 0.63 0.59 2.26 2.07 0.23 0.05 5.97 NE 0.0 0.09 0.50 0.36 2.07 1.76 0.54 0.0 5.32 ENE 0.05 0.23 0.36 0.36 0.86 0.77 0.18 0.0 2.81 E 0.0 0.50 0.72 0.41 0.59 0.14 0.05 0.0 2.41 ESE 0.0 0.18 0.54 0.45 1.22 1.22 0.14 0.0 3.75 SE 0.09 0.41 2.17 1.89 5.19 2.80 0.50 0.0 13.05 SSE 0.05 0.81 2.80 3.38 5.37 2.93 0.27 0.0 15.61 S 0.0 0.45 1.85 2.39 4.60 2.21 0.18 0.05 11.73 SSW 0.0 0.41 1.53 1.49 2.71 1.17 0.41 0.05 7.77 SW 0.09 0.81 1.17 1.31 2.93 1.67 0.23 0.0 8.21 WSW 0.09 0.36 1.22 0.54 1.35 0.50 0.0 0.0 4.06 W 0.05 0.41 1.26 1.94 1.31 0.23 0.0 0.0 5.20 WNW 0.05 0.14 0.72 0.68 1.89 0.09 0.09 0.0 3.66 NW 0.0 0.23 0.59 1.08 1.17 0.14 0.14 0.0 3.35 NNW 0.0 0.18 0.45 0.41 0.90 0.50 0.05 0.0 2.49 SUBTOTAL 0.47 5.44 17.28 17.87 36.09 19.64 3.15 0.15 100.09 TOTAL HOURS OF VALID WIND OBSERVATIONS 2217 TOTAL HOURS OF OBSERVATIONS 2232 RECOVERABILITY PERCENTAGE 99.3 TOTAL HOURS CALM 1 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 9.1 MPH

BFN-16 TABLE 2.3-39 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS SEPT. (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.09 0.19 0.42 1.13 2.92 3.82 0.71 0.14 9.42 NNE 0.0 0.14 0.47 1.04 2.83 3.58 1.41 0.28 9.75 NE 0.0 0.14 0.33 1.08 2.97 4.05 1.08 0.09 9.74 ENE 0.0 0.19 0.24 0.52 1.70 1.79 1.13 0.42 5.99 E 0.0 0.19 0.28 0.42 1.60 1.46 0.38 0.09 4.42 ESE 0.0 0.19 0.52 0.71 3.11 3.25 0.61 0.0 8.39 SE 0.0 0.38 1.55 1.46 6.08 4.62 0.33 0.19 14.61 SSE 0.0 0.57 1.79 1.84 5.32 2.21 0.38 0.42 12.53 S 0.0 0.09 1.08 0.99 2.36 2.21 0.19 0.14 7.06 SSW 0.0 0.47 0.33 0.47 1.08 1.32 0.52 0.0 4.19 SW 0.0 0.09 0.52 0.28 0.24 0.57 0.19 0.0 1.89 WSW 0.0 0.19 0.38 0.33 0.66 0.14 0.05 0.0 1.75 W 0.0 0.09 0.47 0.24 0.85 0.14 0.14 0.05 1.98 WNW 0.0 0.19 0.38 0.28 0.89 0.09 0.05 0.05 1.93 NW 0.0 0.05 0.42 0.52 1.65 0.38 0.33 0.05 3.40 NNW 0.0 0.0 0.33 0.24 1.51 0.71 0.09 0.09 2.97 SUBTOTAL 0.09 3.16 9.51 11.55 35.77 30.34 7.59 2.01 100.02 TOTAL HOURS OF VALID WIND OBSERVATIONS 2123 TOTAL HOURS OF OBSERVATIONS 2160 RECOVERABILITY PERCENTAGE 98.3 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 11.5 MPH

BFN-16 TABLE 2.3-40 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS OCTOBER (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.0 0.22 0.36 0.36 2.29 4.85 1.21 0.0 9.29 NNE 0.0 0.13 0.36 0.67 2.07 3.86 1.08 0.0 8.17 NE 0.0 0.04 0.40 0.58 1.93 1.48 0.76 0.04 5.23 ENE 0.0 0.09 0.22 0.31 1.12 0.81 0.13 0.04 2.72 E 0.0 0.18 0.36 0.27 0.72 0.27 0.0 0.0 1.80 ESE 0.0 0.18 0.67 0.94 2.29 1.66 0.90 0.22 6.86 SE 0.04 0.72 1.03 1.57 4.63 3.86 2.02 1.30 15.17 SSE 0.0 0.31 0.49 0.63 2.88 2.25 1.12 0.13 7.81 S 0.0 0.18 0.40 0.40 2.16 2.61 1.03 0.27 7.05 SSW 0.0 0.22 0.31 0.40 1.84 2.47 0.81 0.0 6.05 SW 0.0 0.22 0.36 0.58 1.17 1.84 1.08 0.18 5.43 WSW 0.0 0.13 0.45 0.31 0.54 0.45 0.13 0.04 2.05 W 0.04 0.22 0.31 0.58 1.21 0.94 0.22 0.0 3.52 WNW 0.0 0.27 0.49 1.12 1.89 1.39 0.27 0.0 5.43 NW 0.0 0.22 0.27 0.49 1.93 2.47 0.72 0.13 6.23 NNW 0.0 0.13 0.22 0.36 1.48 3.73 0.99 0.09 7.00 SUBTOTAL 0.08 3.46 6.70 9.57 30.15 34.94 12.47 2.44 99.81 TOTAL HOURS OF VALID WIND OBSERVATIONS 2226 TOTAL HOURS OF OBSERVATIONS 2232 RECOVERABILITY PERCENTAGE 99.7 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 12.7 MPH

BFN-16 TABLE 2.3-41 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS NOVEMBER (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.09 0.23 0.65 0.79 2.34 3.55 0.47 0.0 8.12 NNE 0.05 0.14 0.33 0.89 3.50 3.22 0.33 0.0 8.46 NE 0.0 0.09 0.42 0.93 2.66 2.90 1.17 0.0 8.17 ENE 0.09 0.28 0.37 0.65 1.17 1.03 0.42 0.0 4.01 E 0.0 0.23 0.51 0.23 1.12 0.65 0.05 0.0 2.79 ESE 0.05 0.19 0.75 0.47 1.45 1.82 1.26 0.14 6.13 SE 0.0 0.37 0.84 0.98 2.15 3.04 2.48 0.75 10.61 SSE 0.05 0.37 0.75 0.75 2.76 3.36 2.62 0.56 11.22 S 0.0 0.47 0.84 1.03 2.71 2.29 1.36 1.03 9.73 SSW 0.0 0.14 0.51 0.75 1.12 0.84 0.0 0.37 3.73 SW 0.0 0.28 0.23 0.51 0.47 0.89 0.14 0.28 2.80 WSW 0.0 0.19 0.42 0.37 1.26 0.89 0.14 0.0 3.27 W 0.09 0.23 0.33 0.37 0.75 0.79 0.19 0.51 3.26 WNW 0.0 0.28 0.42 0.79 1.31 1.45 0.98 0.19 5.42 NW 0.05 0.28 0.61 0.51 1.40 1.64 1.07 0.23 5.79 NNW 0.09 0.33 0.42 0.47 2.10 2.38 0.56 0.05 6.40 SUBTOTAL 0.56 4.10 8.40 10.49 28.27 30.74 13.24 4.11 99.91 TOTAL HOURS OF VALID WIND OBSERVATIONS 2140 TOTAL HOURS OF OBSERVATIONS 2160 RECOVERABILITY PERCENTAGE 99.1 TOTAL HOURS CALM 1 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 12.5 MPH

BFN-16 TABLE 2.3-42 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY DIRECTION DISREGARDING STABILITY CLASS DECEMBER (77, 78, 79)

WIND WIND SPEED (MPH)

DIRECTION 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 0.0 0.09 0.05 0.19 1.44 3.35 0.79 0.19 6.10 NNE 0.0 0.05 0.19 0.28 1.44 1.91 0.19 0.0 4.06 NE 0.0 0.0 0.37 0.37 1.72 0.65 0.28 0.0 3.39 ENE 0.0 0.05 0.33 0.23 0.84 0.79 0.19 0.0 2.43 E 0.0 0.19 0.47 0.51 0.65 0.14 0.0 0.0 1.96 ESE 0.0 0.33 0.37 0.56 1.35 1.68 0.19 0.09 4.57 SE 0.05 0.23 0.70 0.74 1.63 3.77 4.19 0.65 11.96 SSE 0.0 0.28 0.51 0.65 2.75 5.26 2.51 1.07 13.03 S 0.0 0.47 0.51 0.56 2.14 4.00 2.61 1.40 11.69 SSW 0.0 0.37 0.42 0.47 2.23 2.37 0.93 0.74 7.53 SW 0.05 0.19 0.47 0.65 1.49 1.91 0.61 0.09 5.46 WSW 0.0 0.05 0.28 0.51 1.12 1.35 0.28 0.51 4.10 W 0.0 0.19 0.37 0.33 1.68 1.91 0.51 0.28 5.27 WNW 0.05 0.14 0.33 0.33 1.35 2.70 1.21 0.37 6.48 NW 0.0 0.05 0.33 0.51 0.98 2.42 1.16 0.74 6.19 NNW 0.0 0.09 0.28 0.37 1.21 2.61 1.02 0.23 5.81 SUBTOTAL 0.15 2.77 5.98 7.26 24.02 36.82 16.67 6.36 100.03 TOTAL HOURS OF VALID WIND OBSERVATIONS 2148 TOTAL HOURS OF OBSERVATIONS 2232 RECOVERABILITY PERCENTAGE 96.2 TOTAL HOURS CALM 0 ALL COLUMNS AND CALM TOTAL 100 PERCENT OF JOINT VALID OBSERVATIONS METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL MEAN WIND SPEED = 14.2 MPH

BFN-16 TABLE 2.3-43 (Sheet 1)

WIND DIRECTION PERSISTENCE DATA 10 M Level DISREGARDING STABILITY (JAN 1, 77 - DEC 31, 79)

LOST RECORD (%) = 1.79 PERSISTENCE WIND DIRECTION ACC. ACC.

(HOURS) N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW CALM TOTAL TOTAL FREQUENCY 2 177 164 105 113 93 118 181 202 149 70 35 102 129 96 91 128 1 1954 4968 100.00 3 92 91 51 35 43 48 131 93 90 25 23 53 63 45 47 61 0 991 3014 60.67 4 50 54 31 24 26 35 90 67 65 5 6 24 26 29 37 36 0 605 2023 40.72 5 31 37 20 17 15 18 79 56 26 1 1 17 22 18 27 32 0 417 1418 28.54 6 39 27 11 8 14 17 49 26 36 0 1 6 12 17 13 29 0 305 1001 20.15 7 12 21 12 2 6 10 29 20 23 0 2 9 6 9 9 15 0 185 696 14.01 8 7 11 8 2 7 5 26 10 7 1 1 3 7 8 9 13 0 125 511 10.29 9 6 5 5 3 3 4 24 4 9 0 0 5 4 9 8 10 0 99 386 7.77 10 4 5 6 0 5 3 13 4 5 0 0 1 1 4 4 6 0 61 287 5.78 11 3 9 3 0 2 1 13 3 2 0 0 0 4 2 3 6 0 51 226 4.55 12 2 7 3 0 1 0 11 4 3 0 0 0 1 2 3 7 0 44 175 3.52 13 3 11 0 2 1 3 5 2 3 0 0 0 1 1 1 1 0 34 131 2.64 14 1 0 2 0 0 1 5 2 0 0 0 1 1 0 2 2 0 17 97 1.95 15 0 5 0 0 0 0 6 0 2 0 0 1 2 3 0 1 0 20 80 1.61 16 2 1 0 0 0 0 2 2 1 0 0 0 0 1 0 3 0 12 60 1.21 17 2 3 0 0 0 0 3 0 0 0 0 0 0 1 0 1 0 10 48 0.97 18 0 2 0 1 0 0 1 0 1 0 0 0 1 0 0 0 0 6 38 0.76 19 0 0 0 0 0 0 3 0 3 0 0 0 0 1 0 0 0 7 32 0.64 20 1 1 0 0 0 0 3 0 1 0 0 0 0 0 1 0 0 7 25 0.50 21 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 18 0.36 22 0 2 0 0 0 0 0 0 1 0 0 0 0 0 0 3 0 6 17 0.34 23 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 2 11 0.22 24 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 9 0.18 25 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8 0.16 26 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 8 0.16 27 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7 0.14 28 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7 0.14 29 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 7 0.14 30 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 6 0.12

BFN-16 TABLE 2.3-43 (Continued)

(Sheet 2)

WIND DIRECTION PERSISTENCE DATA 10 M Level DISREGARDING STABILITY (JAN 1, 77 - DEC 31, 79)

PERSISTENCE WIND DIRECTION ACC. ACC.

(HOURS) N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW CALM TOTAL TOTAL FREQUENCY 31 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 5 0.10 32 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 2 4 0.08

>32 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 2 2 0.04 TOTAL 432 458 257 207 216 263 680 495 429 102 69 222 281 246 255 355 1 4968 MAXIMUM PERSISTENCE 20 31 14 18 13 14 36 16 32 8 8 15 23 19 20 32 2 (HOURS) 50.0% 3 3 3 2 3 3 4 3 3 2 2 3 3 3 3 3 2 80.0% 5 6 5 4 5 5 7 5 6 3 3 4 5 6 6 6 2 90.0% 6 10 8 5 7 7 10 7 7 3 4 6 7 8 8 9 2 99.0% 16 20 12 13 11 13 20 13 19 5 8 10 15 16 14 22 2 99.9% 20 31 14 18 13 14 36 16 32 8 8 15 23 19 20 32 2 METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 10.00 METER LEVEL

BFN-16 TABLE 2.3-44 (Sheet 1)

WIND DIRECTION PERSISTENCE DATA 93 M LEVEL DISREGARDING STABILITY (JAN 1, 77 - DEC 31, 79)

LOST RECORD (%) = 1.89 PERSISTENCE WIND DIRECTION ACC. ACC.

(HOURS) N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW CALM TOTAL TOTAL FREQUENCY 2 105 125 97 82 83 108 159 193 145 134 109 114 116 112 112 89 0 1883 5070 100.00 3 54 62 52 40 27 59 98 98 100 76 62 45 50 53 72 58 0 1006 3187 62.86 4 46 31 40 33 16 29 64 61 49 42 36 17 36 47 37 35 0 619 2181 43.02 5 27 32 35 15 13 20 50 50 38 27 20 24 25 38 22 20 0 456 1562 30.81 6 16 16 22 14 3 13 39 29 26 13 23 10 14 23 19 23 0 303 1106 21.81 7 13 9 15 6 4 6 27 31 18 12 8 6 9 11 14 10 0 199 803 15.84 8 5 12 11 3 4 3 27 13 10 8 9 2 8 7 11 9 0 142 604 11.91 9 9 12 6 0 0 11 11 12 11 9 6 3 3 9 6 9 0 117 462 9.11 10 4 3 5 2 0 2 11 4 5 2 4 4 4 4 10 5 0 69 345 6.80 11 3 4 5 1 1 7 17 6 11 1 1 1 3 3 2 4 0 70 276 5.44 12 2 6 3 0 0 2 4 6 6 2 0 1 2 1 5 2 0 42 206 4.06 13 7 1 0 0 0 5 6 4 4 1 2 0 2 0 3 2 0 37 164 3.23 14 4 5 2 0 0 2 2 2 2 0 1 1 1 1 3 0 0 26 127 2.50 15 3 1 1 0 0 0 3 3 1 2 0 1 0 1 2 2 0 20 101 1.99 16 3 1 2 0 0 1 2 3 1 1 1 0 0 1 0 1 0 17 81 1.60 17 1 2 1 0 0 1 3 1 2 0 0 0 0 0 1 1 0 13 64 1.26 18 0 1 0 0 0 0 3 1 0 0 1 0 0 0 0 0 0 6 51 1.01 19 1 2 0 0 0 0 0 1 0 0 0 0 0 2 1 0 0 7 45 0.89 20 1 1 0 0 0 0 2 0 0 0 0 0 1 0 0 0 0 5 38 0.75 21 0 1 0 0 0 0 0 1 2 0 0 0 0 1 1 0 0 6 33 0.65 22 3 1 0 0 0 0 0 0 1 0 0 0 1 0 1 1 0 8 27 0.53 23 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 19 0.37 24 1 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 3 18 0.36 25 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 2 15 0.30 26 0 0 0 0 0 1 3 1 0 0 0 0 0 0 0 0 0 5 13 0.26 27 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 8 0.16 28 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 7 0.14 29 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 0.12

BFN-16 TABLE 2.3-44 (Continued)

(Sheet 2)

WIND DIRECTION PERSISTENCE DATA 93 M LEVEL DISREGARDING STABILITY (JAN 1, 77 - DEC 31, 79)

PERSISTENCE WIND DIRECTION ACC. ACC.

(HOURS) N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW CALM TOTAL TOTAL FREQUENCY 30 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 6 0.12 31 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 5 0.10 32 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 4 0.08

>32 0 0 0 0 0 0 2 1 0 0 0 0 0 0 0 0 0 3 3 0.06 TOTAL 308 330 297 196 151 270 537 523 433 330 283 229 275 314 323 271 0 5070 MAXIMUM PERSISTENCE 24 28 17 11 11 26 36 38 32 16 18 15 22 21 24 22 1 (HOURS) 50.0% 3 3 3 3 2 3 4 3 3 3 3 3 3 3 3 3 1 80.0% 6 6 6 5 4 6 7 6 6 5 5 5 5 6 6 6 1 90.0% 10 9 8 6 5 9 10 8 9 7 7 6 7 7 9 8 1 99.0% 22 21 16 10 8 16 26 19 17 13 14 12 14 16 19 16 1 99.9% 24 28 17 11 11 26 36 38 32 16 18 15 22 21 24 22 1 METEOROLOGICAL FACILITY: MET FACILITY LOCATED ABOUT 0.5 MI ESE OF BROWNS FERRY NUCLEAR PLANT WIND SPEED AND DIRECTION MEASURED AT THE 93.00 METER LEVEL

BFN-16 Table 2.3-45 TEMPERATURE DATA DECATUR, ALABAMA 1879 - 1958 Avg. Avg. Extreme Extreme Avg. Max. Min. Max. Min.

Temp. Temp. Temp. Temp. Temp.

Month (°F) (°F) (°F) (°F) (°F)

December 43.7 53.0 34.3 78 1 January 42.9 52.3 33.4 79 -5 February 44.6 54.8 34.4 84 -12 Winter 43.7 53.4 34.0 -- --

March 53.1 64.1 42.1 93 4 April 61.8 73.2 50.3 92 26 May 70.4 81.8 59.0 100 34 Spring 61.8 73.0 50.4 -- --

June 78.2 89.3 67.1 108 44 July 80.7 91.2 70.1 107 52 August 79.9 90.6 69.1 107 52 Summer 79.6 90.4 68.8 -- --

September 74.6 85.9 63.3 104 37 October 63.0 75.2 50.8 100 26 November 51.2 62.3 40.1 86 3 Fall 62.9 74.5 51.4 -- --

Annual 62.0 72.8 51.2 -- --

"The Climate of Decatur, Alabama" (1879-1958), Long, Arthur R., U.S. Weather Bureau State Climatologist for Alabama, Weather Bureau Office, Montgomery, Alabama, July 1959.

BFN-16 Table 2.3-46 TEMPERATURE DATA BROWNS FERRY NUCLEAR PLANT January 1, 1977 - December 31, 1979 Avg. Avg. Extreme Extreme Avg. Max. Min. Max. Min.

Temp. Temp. Temp. Temp. Temp.

Month (°F) (°F) (°F) (°F) (°F)

December 42.9 50.9 35.0 73 15 January 30.5 36.5 23.7 60 -1 February 38.0 46.1 30.3 75 13 Winter 37.1 44.5 29.7 -- --

March 52.0 60.2 43.9 81 18 April 62.4 70.9 53.7 83 38 May 68.7 76.3 60.8 88 44 Spring 61.0 69.1 52.8 -- --

June 75.8 83.6 68.0 94 54 July 78.8 86.6 72.0 96 64 August 77.7 86.0 70.4 93 61 Summer 77.4 85.4 70.1 -- --

September 72.3 79.9 65.5 92 54 October 59.3 68.9 50.0 83 36 November 53.1 60.8 45.4 75 22 Fall 61.6 69.9 53.6 -- --

Annual 59.3 67.2 51.6 -- --

Temperature data measurements at about 33 feet. Meteorological facility located about 0.5 miles from Browns Ferry Nuclear Plant.

BFN-16 Table 2.3-47 PRECIPITATION DATA HUNTSVILLE, ALABAMA 1968-1980 1968-1980 1968-1980 1968-1980 Average Number 1941-1970 Extreme Extreme Maximum In of Days With Normals Monthly Max. Monthly Min. 24-Hours Month 0.01 Inch or More (Inches) (Inches) (Inches) (Inches)

December 11 5.4 9.9 0.9 5.8 January 12 5.1 10.5 1.7 3.0 February 9 5.2 9.6 0.6 3.9 Winter 32 15.7 March 13 5.8 17.0 3.0 7.7 April 9 4.8 9.1 1.8 3.6 May 11 3.9 9.1 3.1 5.7 Spring 33 14.5 June 9 4.0 7.3 0.8 4.5 July 11 4.9 9.4 1.9 4.5 August 9 3.5 4.0 0.9 2.5 Summer 29 12.4 September 9 3.3 9.8 1.8 4.0 October 6 2.6 12.1 0.8 6.0 November 9 3.9 11.5 1.8 3.3 Fall 24 9.8 Annual 119 52.2 "Local Climatological Data," Annual Summary with Comparative Data, Huntsville, Alabama, NOAA, National Climatic Center, Asheville, NC, 1980.

BFN-16 Table 2.3-48 PRECIPITATION DATA January 1, 1977 - December 31, 1979 Average Number Monthly Extreme Extreme Maximum In of Days With Average Monthly Max. Monthly Min. 24-Hours Month 0.01 Inch or More (Inches) (Inches) (Inches) (Inches)

December 9 3.6 6.8 1.9 1.3 January 13 3.8 5.8 2.7 1.4 February 6 2.9 4.9 0.2 2.1 Winter 28 10.3 March 12 5.5 8.5 3.6 3.3 April 9 5.2 7.8 1.2 3.2 May 11 3.7 4.9 1.6 1.9 Spring 32 14.4 June 10 3.3 4.0 2.3 2.1 July 11 3.2 4.5 2.3 2.3 August 10 3.9 7.9 1.5 2.0 Summer 31 10.4 September 10 6.2 8.7 1.7 3.7 October 5 2.6 3.9 0.7 1.4 November 11 6.6 8.6 3.4 3.1 Fall 26 15.4 Annual 117 50.5 Meteorological facility located about 0.5 miles from Browns Ferry Nuclear Plant.

BFN-16 Table 2.3-49 SNOWFALL DATA DECATUR, ALABAMA Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec.

Annual Average snowfall 0.9 0.8 0.2 T 0 0 0 0 0 T 0.2 0.6 2.7 (inches)

Average No. Days 1 1 1

• 0 0 0 0 0 *

• 1 6 (trace or more)

Average No. Days * *

• 0 0 0 0 0 0 0 *

• 1 (0.1 inch or more)

T - trace (not measurable)

• Less than one day "The Climate of Decatur, Alabama" (1879-1958), Long, Arthur R., U.S. Weather Bureau State Climatologist for Alabama, Weather Bureau Office, Montgomery, Alabama, July 1959.