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Radiological Impact Assessment Browns Ferry Nuclear Plant Jul-Dec 1993.
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Site:	Browns Ferry
Issue date:	12/31/1993
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EHCLOSURE 1 TEHHESSEE VALI'UTHORITY BROWHS FERRY HUCLEAR PLAHT (BFH)

UHITS 1~ 2~ AHD 3 RADIOLOGICAL IMPACT ASSESSMEHT REPORT TABLE OF COHTENTS I. Introduction II. Dose Limits III. Dose Calculations IV. Doses from Airbone Effluents V. Doses from Liquid Effluents VI. Population Doses VII. Direct Radiation VIII. Dose to Members of the Public Inside The Site Boundary IX. Total Dose 9404'i'10413 940329

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a TABLE OF CONTENTS (Continued)

Listing of Tables Table 1 Doses from Airborne Effluents Third Quarter El-7 Table 2 Doses from Airborne Effluents Fourth Quater El-8 Table 3 Doses from Liquid Effluents Third Quarter El-9 Table 4 Doses from Liquid Effluents Fourth Quarter El-10 Table 5 Total Dose from Fuel Cycle El-11 Table 6 Joint Frequency Distribution in Percent for El Ground Level Releases Third Quarter El-19 Table 7 Joint Frequency Distribution in Percent for Ground El Level Releases Fourth Quarter El-27 Table 8 Joint Frequency Distribution in Percent for El Split Level Releases Ground Level Portion Third Quarter El-35 Table 9 Joint Frequency Distribution in Percent for El Split Level Releases Ground Level Portion Fourth Quarter El-43 Table 10 Joint Frequency Distribution in Percent for El Split Level Releases Elevated Level Portion Third Quarter El-51 Table ll Joint Frequency Distribution in Percent for Split Level Releases Elevated Level Portion Fourth Quarter El El-59 Table 12 Joint Frequency Distribution in Percent for Stack El Releases Third Quarter El-67 Table 13 Joint Frequency Distribution in Percent for El Stacks Releases Fourth Quarter El-75 El-la

0 Radiological impact Assessment Browns Ferry Nuclear Plant July - December 1993 Potential doses to maximum individuals and the population around Browns Ferry are calculated for each quarter as required in Section 5.2 of the Offsite Dose Calculation Manual (ODCM).

Measured plant releases for the reporting period are used to estimate these doses. Dispersion of radioactive eNuents in the environment is estimated using meteorological data and riverflow data measured during the period. In this report, the doses resulting from releases are described and compared to limits established for Browns Ferry.

The ODCM specifies limits for the release of radioactive eNuents, as well as limits for doses to the general public from the release of radioactive effluents. These limits are set well below the NRC 10 CFR 20 limits which govern the concentrations of radioactivity and exposures permissible in unrestricted areas. This ensures that radioactive eNuent releases are As Low As Reasonably Achievable.

The limits for doses at or beyond the site boundary from airborne noble gases releases are:

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

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

The limit for the dose to a member of the general public at or beyond the site boundary from iodines and particulates released in airborne eNuents is:

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

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

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

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

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

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

Radiological Impact Assessment Browns Ferry Nuclear Plant July - December 1993 Estimated doses to the public are determined using computer models (the Gaseous ENuent Licensing Code, GELC, and the Quarterly Water Dose Assessment Code, QWATA). These models are based on guidance provided by the NRC (in Regulatory Guides 1.109, 1.111 and 1.113) for determining the potential dose to individuals and populations living in the vicinity of the plant. The area around the plant is analyzed to determine the pathways through which the public may receive a dose. The doses calculated are a representation of the dose to a "maximum exposed individual." Some of the factors used in these calculations (such as ingestion rates) are maximum values. Many of these factors are obtained from NUREG/CR-1004. The values chosen will tend to overestimate the dose to this "maximum" person. The expected dose to actual individuals is lower. The calculated doses are presented in Tables 1, 2, 3,4 and 5.

IV. D For airborne eNuents, the public can be exposed to radiation from several sources: direct radiation from the radioactivity in the air, direct radiation from radioactivity deposited on the ground, inhalation of airborne radioactivity, ingestion of vegetation which contains radioactivity deposited from the atmosphere, and ingestion of milk and beef which contains radioactivity deposited from the atmosphere onto vegetation which is then eaten by milk and beef animals.

There are four routine release points from Browns Ferry Nuclear Plant: the turbine building, the radwaste building, the reactor building, and the stack.

Releases from the turbine building are considered ground-level releases. The ground-level Joint Frequency Distribution (JFD) is derived from windspeeds and directions measured 10 meters above ground and from the vertical temperature difference between 10 and 46 meters, and is presented in Tables 6 and 7.

Releases from the radwaste and reactor buildings are considered split-level releases. Portions of the release are treated as elevated while other portions are considered ground-level depending on the ratio of the vertical exit velocity to the horizontal wind speed. The split-level dispersion approach is implemented using a model that requires two complete quarterly JFDs for each eNuent vent, one for the elevated releases and one for the ground-level releases. The ground-level portion of the split-level JFD is based on wind speeds and directions measured 10 meters above ground-level and from the vertical temperature difference between 10 and 46 meters. The elevated portion of the split-level JFD is based on wind speeds and direction measurements at the 46-meter level and the vertical temperature difference between 46 and 91 meters. Both of these JFDs are given in Tables 8, 9, 10, and 11.

Releases from the stack are considered to be elevated-level releases. The JFDs for elevated releases are based on wind directions and wind speeds measured at 91 meters and the vertical temperature difference between 46 and 91 meters, and are given in Tables 12 and 13.

Meteorological variables at Browns Ferry are measured continuously. Measurements collected include wind speed, wind direction, and temperature at heights of 10, 46 and 91 meters above the ground. Quarterly joint frequency distributions (JFDs) are calculated for each release point

Radiological Impact Assessment Browns Ferry Nuclear Plant July - December 1993 using the appropriate levels of meteorological data. A joint frequency distribution gives the percentage of the time in a quarter that the wind is blowing out of a particular upwind compass sector in a particular range of wind speeds for a given stability class A through G. The wind speeds are divided into nine wind speed ranges. Calms are distributed by direction in proportion to the distribution of noncalm wind directions less than 0.7 m/s (1.5 mph). Stability classes are determined from the vertical temperature difference between two measurement levels.

The generally open terrain around BFN is not believed to cause any significant effects on the transport and dispersion of gaseous effluents from the plant. Within 30 kilometers of BFN, the terrain is mostly gently rolling hills (30-60 meters). Between 30 and 80 kilometers the hills become larger to the north and south, and mountainous to the east and northeast. The Tennessee River/Wheeler Lake may have a minor effect on transport and dispersion in the immediate vicinity of BFN during periods of winds with a southerly component, overcast skies, and relatively high wind speeds. Then, the lower layer (1046 meters) stability class tends to be more stable than would be expected. However, during this infrequent condition, dose estimates will be conservative.

Dose estimates for maximum external air exposures (gamma-air and beta-air doses) are made for points at and beyond the site boundary as described in the BFN ODCM.

External doses to the skin and total body, due to submersion in a cloud of noble gases, are estimated for the nearest residence in each sector.

Doses to organs due to releases of airborne effluents are estimated for the inhalation, ground contamination, and ingestion pathways. The ingestion pathway is further divided into four possible contributing pathways'ngestion of cow/goat milk, ingestion of beef, and ingestion of vegetables. Doses from applicable pathways are calculated for each real receptor location identified in the most recent land use survey. To determine the maximum organ dose, the doses from the pathways are summed for each receptor. For the ingestion dose, however, only those pathways that exist for each receptor are considered in the sum, i.e., milk ingestion doses are included only for locations where milk is consumed without commercial preparation and vegetable ingestion is included only for those locations where a garden is identified. To conservatively account for beef ingestion, a beef ingestion dose equal to that for the highest site boundary location is added to each identified receptor. For ground contamination, the dose added to the organ dose being calculated is the total body dose calculated for that location, i.e.,

it is assumed that the dose to an individual organ is equal,to the total body dose.

Doses from airborne eNuents are presented in Tables 1 and 2.

V DO 0 D FL S For liquid effluents, the public can be exposed to radiation from three sources: the ingestion of water from the Tennessee River, the ingestion of fish caught in the Tennessee River, and direct exposure from radioactive material deposited on the river shoreline sediment (recreation).

Radiological Impact Assessment Browns Ferry Nuclear Plant July - December 1993 The concentrations of radioactivity in the Tennessee River are estimated by a computer model which uses measured hydraulic data downstream of Browns Ferry. Parameters used to determine the doses are based on guidance given by the NRC (in Regulatory Guides 1.109) for maximum ingestion rates, exposure times, etc. Wherever possible, parameters used in the dose calculation are site specific use factors determined by TVA. The models that are used to estimate doses, as well as the parameters input to the models, are described in detail in the Browns Ferry Nuclear Plant ODCM.

Radioactivity concentrations in the Tennessee River are calculated assuming that releases in liquid eNuents are continuous. All routine liquid releases from Browns Ferry, located at Tennessee River Mile 294, are made through diffusers which extend into the Tennessee River.

It is assumed that releases to the river through these diffusers will initially be entrained in one-fifth of the water which flows past the plant. The QWATA code makes the assumption that this mixing condition holds true until the water is completely mixed at the first downstream dam, at Tennessee River Mile 283.0.

Doses are calculated for locations between the plant site and the mouth of the Tennessee River.

The maximum potential recreation dose is calculated for a location immediately downstream from the plant outfall. The maximum individual dose from ingestion of fish is assumed to be that calculated for the consumption of fish caught anywhere between the plant and the first downstream dam (Wheeler Dam). The maximum individual dose from drinking water is assumed to be that calculated at the nearest downstream public water supply (Champion Paper Company). This could be interpreted as indicating that the maximum individual, as assumed for liquid releases from Browns Ferry, is an individual who obtains all of his drinking water at the Champion Paper Company, consumes fish caught from the Tennessee River between BFN and Wheeler Dam, and spends 500 hours0.00579 days <br />0.139 hours <br />8.267196e-4 weeks <br />1.9025e-4 months <br /> per year on the shoreline just below the outfall from Browns Ferry. Dose estimates for the maximum individual due to liquid eNuents for each quarter in the period are presented in Tables 3 and 4, along with the average river flows past the plant site for the periods.

Vl.

Population doses for highest exposed organ due to airborne eNuents are calculated for an estimated 627,000 persons living within a 50-mile radius of the plant site. Ingestion population doses are calculated assuming that each individual consumes milk, vegetables, and meat produced with the sector annulus in which he resides. Doses from external pathways and inhalation are based on the 50-mile human population distribution.

Population doses for total body and the maximum exposed organ due to liquid eNuents are calculated for the entire downstream Tennessee River Population. Water ingestion population doses are calculated using actual population figures for downstream public water supplies. Fish ingestion population doses are calculated assuming that all sport fish caught in the Tennessee River are consumed by the Tennessee River population. Recreation population doses are calculated using actual recreational data on the number of shoreline visits at downstream locations.

Population dose estimates for airborne and liquid eNuents are presented in Tables 1, 2, 3 and 4.

El-5

Radiological Impact Assessment Browns Ferry Nuclear Plant July - December 1993 External gamma radiation levels were measured by thermoluminescent dosimeters (TLDs) deployed around BFN. The quarterly gamma radiation levels determined from these TLDs during this reporting period averaged approximately 15.6 mR/quarter at onsite stations and approximately 14.0 mR/quarter at offsite stations, or approximately 1.6 mR/quarter higher onsite than at offsite stations. This is consistent with levels reported at TVA's non operating nuclear, power plant construction sites where the average radiation levels onsite are generally 2-6 mR/quarter higher than the levels offsite. This may be attributable to natural variations in environmental radiation levels, earth moving activities onsite, the mass of concrete employed in the construction of the plants, or other undetermined influences. Fluctuations in natural background dose rates and in TLD readings tend to mask any small increments which may be due to plant operations. Thus, there was no identifiable increase in dose rate levels attributable to direct radiation from plant equipment and/or gaseous eNuents.

Vill.

No routine activities within the site boundary by members of the public have been identified which would lead to their radiation exposure.

. IgrlLJNm To determine compliance with 40 CFR 190, annual total dose contributions to the maximum individual from BFN radioactive eNuents and all other nearby uranium fuel cycle sources are considered.

The annual dose to any organ other than thyroid for the maximum individual is conservatively estimated by summing the following doses: the total body air submersion dose for each quarter, the critical organ dose (for any organ other than the thyroid) from airborne eNuents for each quarter from ground contamination, inhalation and ingestion, the total body dose from liquid eNuents for each quarter, the maximum organ dose (for any organ other than the thyroid) from liquid eNuents for each quarter, and any identifiable increase in direct radiation dose levels as measured by the environmental monitoring program. This dose is compared to the 40 CFR 190 limit for total body or any organ dose (other than thyroid) to determine compliance.

The annual thyroid dose to the maximum individual is conservatively estimated by summing the following doses: the total body air submersion dose for each quarter, the thyroid dose from airborne eNuents for each quarter, the total body dose from liquid eNuents for each quarter, the thyroid dose from liquid eNuents for each quarter, and any identifiable increase in direct radiation dose levels as measured by the environmental monitoring program. This dose is compared to the 40 CFR 190 limit for thyroid dose to determine compliance.

Cumulative annual total doses are presented in Table 5.

El-6

Radiological Impact Assessment Browns Ferry Nuclear Plant July - December 1993 Table 1 Doses from Airborne Effluents Third Quarter v a D e Pathway Dose Quarterly Limit Percent of Limit Location External Gamma Air 3.8E-04 mrad 5 mrad <1% N/1 525 meters Beta Air 6.1E-04 mrad 10 mrad <1% N/1525 meters Submersion Total Body 1.1E-03 mrad 10 mrad <1% NE/3772 meters Skin 2.0E-03 mrad 10 mrad <1% NE/3772 meters Organ Doses Child/Bone 3.8E-03 mrad 7.5 mrad <1% NNW/1 791 meters Child/Thyroid 6.7E-03 mrad 7.5 mrad <1% NNW/1 791 meters Child/Total Body 2.0E-03 mrad 7.5 mrad <1% NNW/1 791 meters Total Body Dose 1.0E-02 man-rem Maximum Organ Dose (organ) 2.3E-02 man-rem (bone)

Population doses can be compared to the natural background dose for the entire 50-mile population of about 56,430 man-remlyear (based on 90 mremlyr for natural background).

E1-7

Radiological impact Assessment Browns Ferry Nuclear Plant July - December 1993 Table 2 Doses from Airborne Effluents Fourth Quarter vd D e Pathway Dose(mrad) Quarterly Limit Percent of Limit Location External Gamma Air 1.8E-04 5 mrad SE/5600 meters Beta Air 7.0E-05 10 mrad SE/5600 meters Submersion Total Body 2.6E-04 10 mrad NE/3772 meters Skin 3.8E-04 10 mrad NE/3772 meters Organ Doses Child/Thyroid 5.5E-03 7.5 mrad NNW/1 791 meters Child/Thyroid 5.5E-03 7.5 mrad NNW/1 791 meters Child/Total Body 1.4E-03 7.5 mrad NNW/1791 meters I 'Dse Total Body Dose 1.0E-02 man-rem Maximum Organ Dose (organ) 1.8E-02 man-rem (thyroid)

Population doses can be compared to the natural background dose for the entire 50-mile population of about 56,430 man-remlyear (based on 90 mremlyr for natural background).

El-8

Radiological Impact Assessment Browns Ferry Nuclear Plant July - December 1993 Table 3 Doses from Liquid ENuents Third Quarter

'v D Age Group Organ Dose Pathway Dose Quarterly Percent of

-(mrem) Limit Limit Adult Total Body Water Ingestion 1.6E-04 Fish Ingestion 2.0E-02 Recreation 2.6E-03 Total 2.3E-02 1.5 mrem 1.5%

Teen Liver Water Ingestion 1.6E-04 Fish Ingestion 3.0E-02 Recreation 2.6E-03 Total 3.3E-02 5 mrem Teen Thyroid Water Ingestion 2.6E-05 Fish Ingestion 3.0E-04 Recreation 2.6E-03 Total 2.9E-03 5 mrem Average Riverflow past BFN (cubic feet per second): 27,278 o u at'on Doses Total Body Dose 2.4E-01 man-rem Maximum Organ Dose (organ) 3.3E-01 man-rem (liver)

Population doses can be compared to the natural background dose for the entire 50-mile population of about 56,430 man-remiyear (based on 90 mremlyr for natural background).

El-9

Radiological Impact Assessment Browns Ferry Nuclear Plant July - December 1993 Table 4 Doses from Liquid Effluents Fourth Quarter

'vdu D Age Group Organ Dose Pathway Dose Quarterly Percent of Limit Limit Total Body Water Ingestion 1.0E-04

'dult Fish Ingestion 1.4E-02 Recreation 1.8E-03 Total 1.6E-02 1.5 mrem 1%

Teen Liver Water Ingestion 1.0E-04 Fish Ingestion 2.1E-02 Recreation 1.8E-03 Total 2.3E-02 5 mrem Teen Thyroid Water Ingestion 3.5E-05 Fish Ingestion 3.5E-04 Recreation 1.8E-03 Total 2.2E-03 5 mrem Average Riverflow past BFN (cubic feet per second): 32,438 o la' ses Total Body Dose 1.2E-01 man-rem Maximum Organ Dose (organ) 1.8E-01 man-rem (liver)

PopulatIon doses can be compared to the natural background dose for the entire 50-mile population of about 56,430 man-rem/year (based on 90 mrem/yr for natural background).

E1-10

Radiological Impact Assessment Browns Ferry Nuclear Plant July - December 1993 Table 5 Total Dose from Fuel Cycle Dose First Second Third Fourth Quarter Quarter Quarter Quarter Total Body or any Organ (except thyroid)

Total body air submersion 6.1E-03 3.8E-04 1.1E-03 2.6E-04 Critical organ dose (air) 1.6E-02 1.1E-02 3.8E-03 5.5E-03 Total body dose (liquid) 5.4E-02 2.7E-02 2.3E-02 1.6E-02 Maximum organ dose (liquid) 6.7E-02 3.9E-02 3.3E-02 2.3E-02 Direct Radiation Dose O.OE-OO O.OE-00 O.OE-00 0.0E-OO Total'.4E-01 7.7E-02 6.1E-02 4.5E-02 Cumulative Total Dose (Total body or any other organ) mrem 3.2E-01 Annual Dose Limit (mrem) 2.50E+01 Percent of Limit 1 3%

Thyroid Dose (mrem)

Total body air submersion 6.1E-03 3.8E-04 1.1E-03 2.6E-04 Thyroid dose (airborne) 1.4E-02 4.6E-03 6.7E-03 5.5E-03 Total body dose (liquid) 5.4E-02 2.7E-02 2.3E-02 1.6E-02 Thyroid dose (liquid) 4.0E-02 4.8E-03 2.9E-03 2.2E-03 Direct Radiation Dose O.OE-OO O.OE-OO O.OE-OO 0.0E-00 Total 1.1E-01 3.7E-02 3.4E-02 2 4E-02 Cumulative Total Dose (Thyroid) mrem 2.1E-01 Annual Dose Limit(mrem) 7.50E+01 Percent of Limit <1%

Radiological Impact Assessment Browns Ferry Nuclear Plant July - December 1993 Table 6 Joint Frequency Distribution in Percent for Ground Level Releases Third Quarter El-12

0 JOINT PERCENTAGE FREQUENCIES STABILITY CLASS h OF WIND SPEED BY WZND DIRECTION FOR (DELTA T< -1. 9 C/100 M)

BROWHS FERRY NUCLEAR PLANT JUL 1, 93 SEP 30, 93 WIND WIND SPEED(MPHl DIRECTIOH CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >~24.5 TOTAL N 0.000 0.000 0.000 0.094 0.094 0.234 Q.QQQ o.oao 0.000 0.421 NNE 0.000 0.000 0.000 0.000 0.140 0.094 0.000 0.000 a.ooo 0.234 HE 0.000 0.000 0.000 0.000 0.047 0.234 0.000 0.000 Q.ooa 0.281 ENE 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 a.o47 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 O.O94 0.047 0.047 0.000 0.000 0.000 0.000 0.187 SE 0.000 0.000 0.374 0.701 0.000 0.000 0.000 0.000 0.000 1.075 SSE Q.QQQ 0.047 1.403 1.075 0.000 0.000 0.000 0.000 0.000 2.525 S Q.QQQ 0.094 0.842 1.403 0.047 0.000 0.000 0.000 0.000 2.384 SSW 0.000 0.000 Q ~ 281 0. 561 0.000 0.000 0.000 0.000 0 ~ 000 0 ~ 842 SW 0.000 0.000 0.234 0.982 0.047 0.000 0.000 0.000 0.000 1.262 WSW 0.000 0.000 0.000 0.047 0.094 0.000 0.000 0.000 0.000 0.140 W 0.000 0.000 0.000 0.000 Q.Q47 Q.ooa 0.000 0.000 0.000 0.047 WNW 0.000 0.000 0.000 0.047 0.000 0.047 0.047 0.000 0.000 0.140 NW 0.000 0.000 0.000 0.000 0.187 0.374 0.1&7 0.000 0.000 0.748 N?IW 0.000 0.000 0.000 0.000 0.000 0.234 0.000 Q.QQQ 0.000 0.234 SUBTOTAL 0.000 0.140 3.226 4.956 0.748 1.262 0.234 0.000 0.000 10. 566 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2204 TOTAL HOURS OF STABILITY CLASS A 228 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CZ ASS A 226 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2139 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.42 METER LEVEL I DATE PRINTED 21-OCT-93 MEAN WIND SPEED ~ 4.74 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-13

JOINT PERCEtiTACE FREQUENCIES OP WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1. 9( DELTA T(=-1.7 C/100 M)

BRO'WNS FERRY NUCZ EAR PLANT JUL 1, 93 SEP 30, 93 WIND WIND SPEED{MPH)

DIRECTION CALM 0. 6-1. 4 1. 5-3. 4 3.5-5.4 5.5-7.4 7.5 12.4 12.5-18.4 18.5-24.4 24.5 TOTAL N 0.000 0.000 0.000 0. 187 0.281 0.140 0.000 0.000 0.000 0.608 tiNE 0.000 0.000 0.047 0.047 0.140 0.094 0.000 0.000 0.000 0.327 NE Q.QQQ o.oao 0.000 0.04 I 0.000 0.000 0.000 0.000 0.000 0.047 ENE 0.000 Q.QQQ 0.04 I 0.000 0.047 O.O47 0.000 0.000 0.000 0.140 E 0.000 0.000 0.000 Q.ooo a.ooo 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.047 0.094 0.000 o.ooa 0.000 0.000 0.000 0 '40 SE 0.000 0.000 0.561 0.187 0.000 0.000 0.000 a.ooo 0.000 0.748 SSE 0.000 0.000 0.561 0.000 0.000 0.000 0.000 0.000 Q.QQQ 0.561 S 0.000 0.047 0.795 0.140 0.000 0.000 0.000 0.000 0.000 0.982 SSW 0.000 0.000 0.18 I 0.140 0.000 0.000 0.000 0.000 0.000 0.327 SW 0.000 0.000 0.281 0.374 0.000 0.000 0.000 0.000 0.000 0.655 WSW o.oao 0.000 0.094 0.561 0 ~ 047 0.000 0.000 0.000 0.000 0.701 W 0.000 0.000 0.047 0.281 0.140 O.O94 0.000 0.000 0.000 0.561 WNW 0.000 0.000 0.000 0.094 0.140 0.281 0.000 0.000 0.000 0.514 NW 0.000 0.000 0.000 0.047 0.047 0.514 0.000 0.000 0.000 0.608 NNW 0.000 0.000 0.000 0.094 0.234 0.094 O.aoa 0 ~ 000 0.000 0 ~ 421 SUBTOTAL 0.000 0.047 2.665 2.291 1.075 1.262 0.000 0.000 0.000 7.340 TOTAL HOURS OF VALID STABILZTY OBSERVATIONS 2204 TOTAL HOURS OP STABILITY CLASS B 161 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY ClASS B 15'7 TOTAZ HOURS OP VALZD WIND DIRECTION-WZND SPEED STABILITY OBSERVATIONS 2139 TOTAL HOURS CALM 0 METEOROLOCZCAL FACZLITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AHD 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.42 METER LEVEL DATE PRINTED: 21-OCT-93 MEAN WZND SPEED ~ 4.78 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED PROM UNROUNDED NUMBERS El-14

JOINT PERCENTAGE FREQUENCIES OP WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1. 7< DELTA T<~-I. 5 C/100 M)

BROWNS PERRY NUCLEAR PLANT JUL 1, 93 SEP 30, 93 WIND WIND SPEED(MPN)

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 0.001 0.000 0.047 0.094 0.094 0.000, 0.000 0.000 0.000 0.234 NNE 0.001 0.000 a.o47 0.234 O.O94 0.000 0.000 0.000 0.000 0.375 NE 0.001 0.000 0.094 0.234 0.047 0.000 0.000 0.000 0.000 0 '75 ENE 0.000 0.000 0.000 0.047 0.000 0.047 0.000 0.000 0.000 0.094 E 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 ESE 0.001 0.000 0.047 0.094 0.000 0.000 0.000 0.000 0.000 0.141 SE 0.008 0.000 0.561 0.094 0.000 0.000 0.000 0.000 0.000- 0.662 SSE 0.017 0.047 1.169 O.O47 0.000 0.000 0.000 0.000 0.000 1.279 S 0.006 0.094 0.327 0.140 0.000 0.000 0.000 0.000 0.000 0.567 SSW 0.005 0.000 0.374 0.047 0.000 0.000 0.000 0.000 0.000 0.426 SW 0.004 0.000 0 ~ 281 0.234 0.047 0.000 0.000 0.000 0.000 0 ~ 565 WSW o.aa3 0.000 0.187 0.468 0.140 0.000 0.000 0.000 0.000 0.797 W 0.002 0.000 0.140 0.701 0. 514 0.000 o.ooa a.aoo 0.000 1.358 WNW 0.000 0.000 0.000 0.047 0.327 0.281 0.000 0.000 0.000 0.655 NW 0.000 0.000 0.000 0.187 0.421 0.187 0.047 0.000 0.000 0 ~ 842 NNW 0.000 0.000 0.000 0.140 0.234 0.047 0.000 0.000 0.000 0.421 SUBTOTAL 0.047 0.140 3.273 2.852 1.917 0.561 0.047 0.000 0.000 8.836 TOTAL HOURS OP VALID STABILITY OBSERVATIONS 2204 TOTAL HOURS OF STABILITY CLASS C 190 TOTAL HOURS OF VALID WZND DIRECTION-WIND SPEED-STABILITY CLASS C 189 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED>>STABILITY OBSERVATIONS 2139 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILZTY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DZRECTZON MEASURED AT 10.42 METER LEVEL DATE PRINTED: 21-OCT-93 MEAN WZND SPEED ~ 4.40 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-15

JOZNT PERCENTAGE FREQUENCIES OP WIND SPEED BY WIND DIRECTION POR STABILITY CLASS D {-1.5< DELTA T<~-0.5 C/100 M)

BROWNS PERRY NUCLEAR PLANT JVL 1, 93 SEP 30, 93 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-').4 7.5-12.4 12.5-18.4 18.5-24.4 24 ' TOTAL N 0.019 0.047 0.514 0.888 0. 561 0.234 0.047 0.000 0.000 2.309 NNE 0.017 0.000 0.514 0.421 0.140 0.094 0.000 0.000 0.000 1.186 NE 0.025 0.047 0.701 0.327 0.140 0.047 0.047 0.000 0.000 1.334 ENE 0.016 0.140 0.327 0.327 0.094 0.000 0.000 0.000 0.000 0.904 E 0.019 0.000 0.561 0.094 0.047 0.000 0.000 0.000 0.000 0.720 ESE 0.020 0.047 0.561 0.047 0.000 0.000 0.000 0.000 0.000 0.675 SE 0.030 0.187 0.701 0.187 0.047 0.000 0.000 0.000 0.000 1 '52 SSE 0.039 0.327 0.842 0.748 0.000 0.000 0.000 0.000 0.000 1.956 S O.Q59 0.187 1.590 0.888 0.000 0.000 0.000 0.000 0.000 2.724 SSW 0.073 0.561 1.636 0.421 0.000 0.000 0.000 0.000 0.000 2.691 SW 0.050 0.281 1.216 0.187 0.000 0.000 0.000 0.000 0.000 1.733 WSW 0.061 0.327 1.496 1.636 0.140 0.000 0.000 0 ~ QOO 0.000 3.661 W 0.047 0.094 1.309 1.403 0.795 0.187 0.000 0.000 0.000 3.834 WNW 0.014 0.187 Q.234 0.655 0.608 0.655 0.000 0.000 0.000 2.352 NW 0.011 . 0.047 0.281 0.608 0.374 0.561 0.094 0.000 0.000 1 '74 NN'W 0.016 0.047 0.421 0.561 0.374 0.140 0.000 0.000 0.000 1 ~ 558 SUBTOTAL 0.514 2.525 12.903 9.397 3.319 1 ~ 917 0.187 0.000 0.000 30.762 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2204 TOTAL HOVRS OF STABILITY CLASS D 672 TOTAL HOURS OF VALID WIND DIRECTION-WZND SPEED-STABILITY CLASS D 658 TOTAL HOURS OP VALID WIND DIRECTION-MIND SPEED-STABILITY OBSERVATIONS 2139 TOTAL HOURS CALM 11 METEOROLOGICAL PACZLZTY: BROWNS PERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10. 03 AND 45. 30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.42 METER LEVEL DATE PRINTED: 21-OCT-93 MEAN WIND SPEED ~ 3.79 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED PROM UNROUNDED NVMBERS El-16

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WZND DIRECTZON FOR STABILITY CLASS E t-0. 5< DELTA T<~ 1.5 C/100 M)

BROWNS FERRY NUCIEAR PLANT JUL 1, 93 - SEP 30, 93 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 >M24.5 TOTAL N 0.047 0.187 0. 514 0. 374 O.Q94 0.047 0.000 0.000 0.000 1.263 NNE 0.076 0 .'187 0.935 0.327 0.047 0.000 0.047 0.000 0.000 1 ~ 619 NE 0.032 0.281 0.187 0.140 0.047 0.047 0.000 0.000 0.000 0.733 ENE 0.025 0.047 0.327 O.O94 0.000 a.oaa 0.000 0.000 0.000 0.493 E 0.066 0.234 0 '48 0.281 0.000 0.000 0.000 0.000 0.000 1.329 ESE 0.098 O.468 0.982 0.094 0.000 0.000 0.000 0.000 o.oon 1.641 SE 0.082 0.421 0.795 0.094 0.000 0.000 a.ooo 0.000 0.000 1.391 SSE 0.035 0.140 0.374 0.281 0.000 0.000 0.000 0.000 0.000 0.829 S 0.076 0. 32'l 0. j95 0.094 0.094 0.000 0.000 0.000 0.000 1.385 SSW 0.085 0.561 0. 701 0.140 0.047 0.047 o.aaa 0.000 0.000 1.581 SW 0.076 0.468 0.655 0.094 0.000 0.000 0.000 0.000 0.000 1.291 WSW 0.101 0.561 0.935 0-140 0 ~ 000 0.000 0.000 0.000 0.000 1.737 W 0.073 0.421 0.655 0.468 0.000 0.000 0.000 0.000 0.000 1.615 WNW 0.013 0.047 0.140 0.140 0.000 0.094 0.000 0.000 0.000 0.433 NW 0.022 0.140 0.187 0.234 0.140 0.140 0.047 0.000 0.000 0. 910 NNW 0.076 0.281 0.842 0.748 0.094 0.094 O.OQO Q.aao 0.000 2.133 SUBTOTAL 0.982 4.769 9.'771 3.740 0.561 0.468 0.094 0.000 0.000 20.383 TOTAL HOURS OF VALID STABZLZTY OBSERVATIONS 2204 TOTAL HOURS OF STABILITY CLASS E 465 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY CLASS E 436 TOTAL HOURS OF VAZ ID WIND DIRECTION-WIND SPEED STABILITY OBSERVATIONS 2139 TOTAL HOURS CALM 21 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA T BETWEEN 10 03 AND 45 ~ 30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.42 METER ZEVEL DATE PRZNTED: 21-OCT-93 MEAN WIND SPEED ~ 2.59 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<~ 4.0 C/100 Ml BROWNS FERRY NUCLEAR PLANT JUL 1, 93 - SEP 30, 93 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 0.052 0. 421 1.403 0.327 0.140 0.000 0.000 0.000 0.000 2.343 NNE o.044 0. 421 1.122 0.655 0.000 0.000 0.000 0.000 o.oon 2.241 NE 0.036 0. 514 0.748 0.094 0.094 o.ooa 0.000 0.000 0.000 1.485 ENE 0.037 0.327 0.982 0.140 0.000 0.000 0.000 0.000 0.000 1.486 E 0.033 0.187 0.982 0.281 0.000 0.000 0.000 0.000 0.000 1.483 ESE 0.016 0.234 0.327 a.a47 0.000 0.000 0.000 0 ~ 000 0.000 0.624 SE 0.005 0.047 0.140 0.000 0.000 0.000 0.000 0.000 0.000 0.192 SSE 0.003 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.096 S o.oa3 O.O47 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.096 SSW 0.001 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.048 SW 0.007 0.094 0.140 0.047 0.000 0.000 0.000 0.000 0.000 0.287 WSW 0.001 0.000 0.04'7 0.000 0.047 0.000 0.000 0.000 0.000 0.095 W 0.005 0.047 0.140 0.000 0.000 O.OQO o.aoo 0.000 0.000 0.192 WNW 0.004 0.094 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.144 NW 0.005 O.O47 0.140 0.094 0.000 0.000 0.000 0.000 0.000 0.286 NNW 0.028 0.140 0.842 Q.187 0.047 0.000 0.000 0.000 0.000 1.243 SUBTOTAL 0.281 2.712 7.153 1.870 0.327 0.000 0.000 0.000 0.000 12.342 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2204 TOTAL HOVRS OF STABILITY CLASS F 274 TOTAL HOURS OF UALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 264 TOTAL HOURS OF VALID WZND DIRECTION-WZND SPEED-STABILITY OBSERVATIONS 2139 TOTAL HOVRS CALM 6 METEOROLOGICAL FACILITY: BROWNS FERRY NVCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.42 METER LEYEL DATE PRZHTED: 21-OCT-93 MEAN WIND SPEED ~ 2.39 NOTE'OTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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

BROWNS FERRY NUCLEAR PLANT JUL 1, 93 - SEP 30, 93

'WIND WIND SPEED(MPH)

D'ZRECTION 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 )s24.5 TOTAL N 0. 157 0.561 l. 449 0.608 0.000 0.000 0.000 Q.QQQ Q.aaa 2.775 NNE 0.113 0.187 1.262 1.730 0.047 0.000 0.000 0.000 0.000 3.339 NE 0.062 0.421 0.374 0.000 0.000 0.000 0.000 0.000 0.000 0.857 ENE 0.051 0.047 0.608 0.094 a.aaa 0.000 0.000 0.000 0.000 0.799 E, 0.044 0.047 0. 514 0.187 0.000 0.000 0.000 0.000 Q.aaa 0.'792 ESE 0.007 0 ~ 094 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.101 SE 0.011, 0.047 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.151 SSE 0.007 0.000 0.094 Q.QQQ 0.000'.000 Q.oaa a.aaa 0.000 0.000 0.101 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Q.QQQ 0.000 SEW 0.004 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.050 SW 0.000 0.000 0.000 0.000 0.000 0.000 0 F 000 0.000 0.000 0.000 WSW 0.007 0.094 0.000 0.000 Q.aaa a.aaa 0.000 0.000 0.000 0.101 W 0.004 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.050 WNW 0.007 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.101 NW 0.007 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.101 NNW 0.033 0.234 0.187 0.000 Q.QQQ Q.aaa 0.000 0.000 0.000 0.454 SUBTOTAL 0.514 1.917 4.675 2.618 0.047 0.000 0.000 0.000 0.000 9.771 TOTAL HOURS OF VALID STABZLITY OBSERVATIONS 2204 TOTAL HOURS OF STABILITY CLASS G 214 TOTAL HOURS OF VALID WINO DZRECTZON-WZND SPEED-STABILITY CLASS G 209 TOTAL HOURS OF VALID WIND DIRECTION WIND SPEED STABILITY OBSERVATIONS 2139 TOTAL HOURS CALM, 11 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILZTY BASED ON DELTA T BETWEEN 10 03 AND 45 30 METERS WIND SPEED AND DZRECTION MEASURED AT 10.42 METER LEVEL DATE PRINTED: 21-OCT-93 MEAN WIND SPEED ~ 2 '5 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-19

Radiological Impact Assessment Browns Ferry Nuclear Plant July - December 1993 Table 7 Joint Frequency Distribution in Percent for Ground Level Releases Fourth Quarter E1-20

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

BROWNS FERRY NUCLEAR PLANT OCT 1, 93 DEC 31, 93 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 >a24.5 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.229 0.137 0.000 0.000 0.366 NNE 0.000 0.000 0.000 0.000 0.046 0.320 0.000 0.000 0.000 0.366 NE 0.000 0.000 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.091 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.183 0.091 0.000 0.000 0.000 0.000 0.274 SE 0.000 0.000 0.274 0.686 0. 137 0.000 0.000 0.000 0.000 1.097 SSE 0.000 0.000 0.274 0.823 0.000 0.000 0.000 0.000 0.000 1.097

-S 0.000 0.000 0.274 0.366 0.091 0.000 0.000 0.000 0.000 0.732 SSW 0.000 0.000 0.046 0.320 0.091 0.000 0.000 0.000 0.000 0.457 SW 0.000 0.000 0.046 0.320 0.000 0.000 0.000 0.000 0.000 0.366 WSW 0.000 0.000 0.000 0.137 0.137 0.000 0.000 0.000 0.000 0.274 W 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.046 WNW 0.000 0.000 0.000 0.046 0.000 0.000 0.046 0.000 0.000 0.091 NW 0.000 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.091 NNW 0.000 0.000 0.000 0.000 0.000 0.091 0.046 0.000 0.000 0.137 SUBTOTAL 0.000 0.000 0.914 2.881 0.686 0.732 0. 274 0.000 0.000 5.487 TOTAL HOURS OF VALID STABZLITY OBSERVATIONS 2201 TOTAL HOURS OF STABILITY CLASS A 120 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 120 TOTAL HOURS OF VAZ ZD WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2187 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELT*-T BETWEEN 10.03 AND 45-30 METERS WZND SPEED AND DIRECTION MEASURED AT 10.42 METER LEVEL DATE PRINTED 24-JAN-94 MEAN WIND SPEED ~ 5.54 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-21

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B t-1.9< DELTA T<~-1.7 C/100 H)

BROWNS FERRY NUCLEAR PLANT OCT 1, 93 - DEC 31, 93 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 lb.5-24.4 >~24.5 TOTAL N 0.000 0.000 0.000 0.046 0.137 0.183 0.091 0.000 0.000 0.457 NNE 0.000 0.000 0.000 0.000 0.091 0.183 0.000 0.000 0.000 0.274 NE 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 ESE 0.000 0.000 0.000 0.183 0.046 0.000 0.000 0.000 0.000 0.229 SE 0.000 0.000 0.091 0.137 0.046 0.000 0.000 0.000 0.000 0.274 SSE 0.000 0.000 0.274 0.046 0.000 0.000 0.000 0.000 0.000 0.320 S 0.000 0.000 0.137 0.000 0.000 0.000 0.000 0.000 0.000 0.137 SSW 0.000 0.000 0.091 0.091 0.000 0.000 0.000 0.000 0.000 0.183 SW 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.091 WSW 0.000 0.000 0.046 0.091 0.091 0.000 0.000 0.000 0.000 0.229 W 0.000 0.000 0.000 0.046 0.000 0.046 0.000 0.000 0.000 0.091 WNW 0.000 0.000 0.000 0.000 0.000 0.137 0.000 0.000 0.000 0.137 NW 0.000 0.000 0.000 0.046 0.320 0.183 0.000 0.000 0.000 0.549 NNW 0.000 0.000 0.046 0.091 0.046 0.137 0.000 0.000 0.000 0.320 SUBTOTAL 0.000 0.000 0.732 0.914 0.777 0.869 0.091 0.000 0.000 3.384 TOTAL HOURS OF VALID STABZLZTY OBSERVATIONS 2201 TOTAL HOURS OF STABZLZTY CLASS B 74 TOTAL HOURS OF VALID WZND DZRECTION-WZND SPEED-STABILITY CLASS B 74 TOTAL HOURS OF VALZD WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2187 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.42 METER LEVEL DATE PRINTED: 24-JAN-94 MEAN WIND SPEED M 6.18 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-22

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

BROWNS FERRY NUCLEAR PLANT OCT 1, 93 DEC 31, 93 WIND WZND SPEED(MPH)

DIRECTION CALM 0. 6-1. 4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 ><24.5 TOTAL N 0.000 0.000 0.000 0.137 0.000 0.137 0.000 0.000 0.000 0.274 NNE 0.000 0.000 0.000 0.000 0.091 0.046 0.000 0.000 0.000 0.137 NE 0.000 0.000 0.000 0.046 0.046 0.091 0.000 0.000 0.000 0.183 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.091 SE 0.000 0.000 0.549 0.091 0.046 0.000 0.000 0.000 0.000 0.686 SSE 0.000 0.000 0.320 0.183 0.046 0.000 0.000 0.000 0.000 0. 549 S 0.000 0.000 0.183 0.091 0.000 0.000 0.000 0.000 0.000 0. 274 SSW 0.000 0.000 0.183 0.091 0.000 0.000 0.000 0.000 0.000 0.274 SW 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.091 WSW 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0 F 000 0.046 W 0.000 0.000 0.046 0.091 0.183 0.000 0.000 0.000 0.000 0.320 WNW 0.000 0.000 0.000 0.137 0.091 0.229 0.091 0.000 0.000 0.549 NW 0.000 0.000 0.046 0.091 0. 229 0.183 0.046 0.000 0.000 0.594 NNW 0.000 0.000 0.000 0.000 0.137 0.000 0.000 0.000 0.000 0.137 SUBTOTAL 0.000 0.000 1. 417 1.097 0.869 0.686 0.137 0.000 0.000 4.207 TOTAL HOURS OF VAIZD STABZLZTY OBSERVATIONS 2201 TOTAL HOURS OF STABILITY CLASS C 92 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILZTY CLASS C 92 TOTAL HOURS OF VALID WIND DIRECTION WIND SPEED-STABILITY OBSERVATIONS 2187 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WZND SPEED AND DIRECTION MEASURED AT 10.42 METER LEVEL DATE PRINTED: 24-JAN-94

'MEAN WIND SPEED ~ 5.38 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-23

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-I ~ 5< DELTA T<~-0. 5 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1 ~ 93 DEC 31, 93 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 0.091 0. 229 0.503 0.640 1.509 0.320 0.000 0.000 3.292 NNE 0.000 0.046 0.366 0.823 0.274 0.366 0.183 0.000 0.000 2.058 NE 0.000 0.046 0.366 0.823 0.183 0.091 0.000 0.000 0.000 1.509 ENE 0.000 0.000 0.183 0.412 0.046 .0. 000 0.000 0.000 0.000 0.640 E 0.000 0.046 0.366 0.640 0.000 0. 000 0.000 0.000 0.000 1.052 ESE 0.000 0.000 0.320 0.914 0.640 0.046 0.000 0.000 0.000 1.920 SE 0.000 0.000 1.372 0.183 0.457 0.046 0.000 0.000 0.000 2.058 SSE 0.000 0.000 1.738 0.732 0.091 0.000 0.000 0.000 0.000 2.561 S 0.000 0.046 1.829 0.549 0.091 0.000 0.000 0.000 0.000 2.515 SSW 0.000 0.137 0.457 0.594 0.000 0.000 0.000 0.000 0.000 1.189 SW 0.000 0.046 0.457 0.640 0.046 0.000 0.000 0.000 0.000 1.189 WSW 0.000 0.046 0.366 0,457 0.412 0.366 0.000 0.000 0.000 1.646 W 0.000 0.000 0.457 0.412 0.320 0.366 0.000 0.000 0.000 1.555 WNW 0.000 0.000 0.046 0.183 0.366 1.509 0.457 0.091 0.000 2.652 NW 0.000 0.000 0.137 0.549 0.320 2.058 1.235 0.229 0.000 4.527 NNW 0.000 0.000 0.137 0.549 0.549 2.698 0.640 0.000 0.000 4.572 SUBTOTAL 0.000 0.503 8.825 8.962 4.435 9.053 2.835 0.320 0.000 34.934 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2201 TOTAL HOURS OF STABILITY CLASS D 769 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 764 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2187 TOTAL HOURS CALM 0 METEOROLOGICAL FACZLITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.42 HETER LEVEL DATE PRINTED: 24-JAN-94 MEAN WIND SPEED ~ 6.52 NOTE TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-24

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION POR STABILITY CLASS E (-0 5< DELTA T<~ 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1 ~ 93 DEC 31 i 93 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 >a24.5 TOTAL N 0.008 0.091 0.640 0.412 0.046 0.320 0.137 0.000 0.000 1.654 NNE 0'. 003 0.046 0.183 0.320 0.366 0.046 0.000 0.000 0.000 0.963 NE 0.005 0.091 0.366 0.137 0.046 0.000 0.000 0.000 0.000 0.645 ENE 0.003 0.000 0.274 0.183 0.000 0.000 0.000 0.000 0.000 0 '60 E 0. 010 0.091 0.777 0.869 0.046 '0.000 0.000 0.000 0.000 1.793 ESE 0. 016 0.229 1.235 1.417 0.640 0.137 0.000 0.000 0.000 3.674 SE 0.021 0.274 1.646 0.960 0.229 0.046 0.000 0.000 0.000 3.176 SSE 0. 021 0.320 1.600 0.914 .0.137 0.046 0.000 0.000 0.000 3.039 S 0.015 0.183 1.189 0.869 1.006 0.274 0.000 0.000 '0.000 3.536 SSW 0.007 0.091 0.503 0.274 0.000 0.000 0.000 0.000 0.000 0.875 SW 0.004 0.183 0.137 0.183 0.046 0.000 0.000 0.000 0.000 0.552 WSW 0.008 0.091 0.594 0.320 0.000 0.046 0.000 0.000 0.000 1.059 W 0.006 0.091 0.412 0.229 0.091 0.183 0.000 0.000 0.000 1. 011 WNW 0.002 0.046 0.137 0.137 0.137 0.046 0.000 0.000 0.000 0.505 NW 0.002 0.000 0.137 0.000 0.000 0.412 0.183 0.000 0.000 0.733 NNW 0.009 0.046 0.732 0.686 0.366 0.914 0.091 0.000 0.000 2.844 SUBTOTAL 0. 137 1.875 10.562 7.910 3.155 2.469 0.412 0.000 O.noo 26.520 TOTAL HOURS OF VALID STABILZTY OBSERVATIONS 2201 TOTAL HOURS OP STABILITY CLASS E 587 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILZTY CLASS E 580 TOTAL HOURS OF VALID WIND DIRECTZON-WIND SPEED-STABILITY OBSERVATIONS 2187 TOTAL HOURS CALM 3 METEOROLOGICAL PACILITY: BROWNS PERRY NUCLEAR'PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10. 42 METER LEVEL DATE PRINTED: 24-JAN-94 MEAN WIND SPEED ~ 4.14 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED PROM UNROUNDED NUMBERS E1-25

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<~ 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 93 DEC 31, 93 WIND DIRECTION CALM 0.6-1.4 '.5-3.4 WIND SPEED{MPH) 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >~24.5 TOTAL N 0.003 0.000 0.732 0.320 0.046 0.000 0.000 0.000 0.000 1.101 NNE 0.003 0.046 0.640 0.320 0.366 0.046 0.000 0.000 0.000 1.421 NE 0.002 0.274 0.183 0.000 0.000 0.000 0.000 0.000 0.000 0.459 ENE 0.003 0.137 0.457 0.091 0.000 0.000 0.000 0.000 0.000 0.689 E 0.007 0.137 1.417 0.686 0.000 0.000 0.000 0.000 0.000 2.248 ESE 0.006 0.137 1.235 0.183 0.000 0.000 0.000 0.000 0.000 1. 561 SE 0.007 0.366 1.189 0.320 0.000 0.000 0.000 0.000 0.000 1.882 SSE 0.005 0.366 0.732 0.183 0.091 0.046 0.000 0.000 0.000 1.423 S 0.002 0.046 0.457 0.320 0.503 0.137 0.000 0.000 0.000 1.466 SSW 0.001 0.137 0.046- 0.091 0.000 0.000 0.000 0.000 0.000 0.275 SW 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 WSW 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 W 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.092 WNW 0.001 0.046 0.091 0 F 000 0.000 0.000 0.000 0.000 0.000 0.138 NW 0.001 0. 137 0. 183 0.046 0.000 0.000 0.000 0.000 0.000 0.367 NNW 0.002 0.046 0.366 0.091 0.183 0.000 0.000 0.000 0.000 0.688 SUBTOTAL 0.046 1.966 7.819 2.652 1.189 0.229 0.000 0.000 0.000 13.900 TOTAL HOURS OF VALID STABILITY OBSERVATZONS 2201 TOTAL HOURS OF STABILITY CLASS F 306 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 304 TOTAL HOURS OF VALID WIND DZRECTION WZND SPEED STABILITY OBSERVATIONS 2187 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT 10. 42 METER LEVEL DATE PRINTED: 24-JAN-94 MEAN WIND SPEED ~ 3.01 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

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

BROWNS FERRY NUCLEAR PLANT OCT 1, 93 - DEC 31, 93 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 0.022 0. 549 1.052 0.229 0. 000 0.000 0.000 0.000 0.000 1.851 NNE 0.021 0.457 1.097 0.503 0.000 0.000 0.000 0.000 0.000 2.079 NE 0.019 0.320 1.052 0.046 0.000 0.000 0.000 0.000 0.000 1.436 ENE 0.017 0.183 1.097 0.046 0.000 0.000 0.000 '0.000 0.000 1.343 E 0.011 0.091 0.732 0.137 0.000 0.000 0.000 0.000 0.000 0.971 ESE 0.005 0.137 0.229 0.000 0.000 0.000 0.000 0.000 0.000 0.371 SE 0.005 0.183 0.183 0.000 0.000 0.000 0.000 0.000 0.000 0.371 SSE 0.022 0.412 1.235 0.183 0.000 0.000 0.000 0.000 0.000 1.851 S 0.004 0.137 0.183 0.137 0.000 0.000 0.000 0.000 0.000 0.462 SSW 0.001 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SW 0.001 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.093 WSW 0.001 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.002 0.137 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.139 NNW 0.006 0.320 0.137 0.046 0.000 0.000 0.000 0.000 0.000 0.509 SUBTOTAL 0.137 3.064 7.042 1.326 0.000 0.000 0.000 0.000 0.000 11.568 TOTAL HOURS OF VALZD STABILITY OBSERVATIONS 2201 TOTAL HOURS OF STABILITY CLASS G 253 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 253 TOTAL HOURS OF VALID WZND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2187 TOTAL HOURS CALM 3 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10. 03 AND 45. 30 METERS WIND SPEED AND DIRECTION MEASURED AT 10.42 METER LEVEL DATE PRINTED: 24-JAN-94

)(EAN WIND SPEED ~ 2.12 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-27

Radiological impact Assessment Browns Ferry Nuclear Plant July - December 1993 Table 8 f

Joint requency Distribution in Percent for Split Level Releases Ground Level Portion Third Quarter El-28

SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A t DELTA T<~-1. 9 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE

'JUL 1, 93 - SEP 30, 93 WZND WIND SPEED(MPH)

DIRECTION CALM 0. 6-1. 4 1.5-3.4 3.5-5.4 5.5-3.4 7.5-12.4 12.5-18.4 18.5-24.4 24.5 TOTAL N 0.000 0.000 0.000 0.001 0.009 0.041 0.000 0.000 0.000 0.052 N4l E 0.000 a.aoo 0.000 0.000 0.005 0.006 0.000 0.000 0.000 0.011 NE 0.000 0.000 0.000 0.000 0.003 Q.Q15 a.ooo 0.000 0.000 0.018 ENE 0.000 0.000 0.000 0.000 0.000 0.006 0.000 0.000 Q.QQQ 0.006 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.002 0.004 0.000 0.000 0.000 0.000 0.006 SE 0.000 0.000 0.002 Q.Q37 o.oao 0.000 0.000 0.000 0.000 0 ~ 039 SSE 0.000 0.000 0.044 0.082 0.000 0.000 0.000 0.000 a.aao 0.125 S 0.000 0.000 0.012 0.111 0.037 0.000 0.000 0.000 0.000 0.161 SSW 0.000 0.000 0.000 0.022 0.000 0.000 0.000 0.000 0.000 0.022 SW 0.000 Q.QQQ 0.003 0.040 0.002 0.000 0.000 0.000 0.000 0.046 WSW 0.000 0.000 0.000 0.000 0.002 0.000 o.aoo 0.000 0.000 0.002 W 0.000 0.000 0.000 0.000 0.001 0.000 0.000 0.000 Q.QQQ 0.001 WN'W 0.000 0.000 0.000 0.000 0.000 0.006 0.009 0.000 0.000 0. 016 NW 0.000 0.000 0.000 0.000 0. 017 0.050 0.038 0.000 0.000 0. 106 NNW 0.000 0.000 0.000 0.000 0.000 0.030 0.000 0.000 0.000 0.030 SUBTOTAL 0.000 0.000 0.061 0.296 0.081 0.155 0.048 0.000 0.000 0.640 TOTAL HOURS OF VALID OBSERVATIONS 2036.000 TOTAL HOURS OF GROUND LEVEL RELEASE 93.700 TOTAL HOURS OF STABILITY CIASS A 13.040 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS A 13.040 METEOROLOGZCAL FACZLITY BROWNS FERRY NUCIEAR PLANT STABILITY BASED ON DEITA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.42 METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRZHTED: 21 OCT-93 NOTE: 'OTALS AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-29

~- SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DZRECTZON FOR STABILITY CLASS B (-1.9< DELTA TC66-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUHD LEVEL RELEASE MODE JUL 1, 93 SEP 30, 93 WIND WIND SPEEDtMPH)

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 >a24.5 TOTAL 0.000 0.000 0.000 0.002 0.026 0.015 0.000 0.000 0.000 0.043 NNE 0.000 0.000 0.000 0.000 0.006 0.006 0.000 0.000 0.000 0.012 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Q.QQQ 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.003 E 0.000 0.000 Q.QQQ o.ooo 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.012 0.000 0.000 0.000 0.000 0.000 0.012 SE 0.000 0.000 0.000 0.012 0.000 0.000 0.000 0.000 0.000 0.012 SSE 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.000 0.000 0.005 S 0.000 0.000 0.003 0.020 0.000 0.000 0.000 0.000 0.000 0.023 SSW 0.000 Q.QQQ 0.005 0.000 0.000 0.000 0.000 0.000 0.000 0.005 SW 0.000 0.000 0.000 0.008 0.000 0.000 0.000 0.000 0.000 0.008 WSW 0.000 0.000 0.000 0.015 0.005 0.000 0.000 0.000 0.000 0.020 W 0.000 0.000 0.000 0.000 0. 00'7 Q.Q13 o.ooo 0.000 0.000 0.020 WNW 0.000 0.000 0.000 0.000 0.007 0.029 0.000 0.000 0.000 0.036 NW 0.000 0.000 0.000 0.000 0.002 0.048 0.000 0.000 0.000 0.050 HNW 0.000 0.000 0.000 0.000 0.017 0.014 0.000 0.000 Q.QQQ 0.031 SUBTOTAL 0.000 0.000 Q.014 Q.Q68 0.074 0.124 0.000 0.000 0.000 0.280 TOTAL HOURS OF VALID OBSERVATIONS 2036.000 TOTAL HOURS OF GROUND LEVEL RELEASE 93.700 TOTAL HOURS OF STABILITY CLASS B 6.640 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS B 5.710 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DZRECTZON MEASURED AT 10.42 METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EFPLUENT VELOCZTY ~ 12.60 M/S DATE PRINTED: 21-OCT-93 NOTE: TOTALS AND SUBTOTAIS ARE OBTAINED FROM UNROUNDED NUMBERS E1-30

SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILZTY CLASS C (-I . 7< DELTA T<II-1. 5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JUL 1, 93 - SEP 30, 93 WIND WIND SPEED(MPH)

D1RECTZON CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7. 5-12. 4 12. 5-18. 4 18. 5-24. 4 >~24.5 TOTAL N 0.000 0.000 0.000 0.002 0.005 0.000 o.oao 0.000 0.000 0.007 NNE 0.000 0.000 0.000 0.003 0.007 0.000 0.000 0.000 0.000 Q.01Q NE 0.000 0.000 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.003 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.005 0.000 0.000 0.000 Q.aaa 0.000 0.005 SE 0.000 0.000 0.000 0.008 0.000 0.000 0.000 0.000 0.000 0.008 SSE 0.000 0.000 D.OOO 0.010 0.000 0.000 0.000 0.000 0.000 0. 010 S 0.000 a.aoo 0.003 0.018 0.000 0.000 0 ~ 000 0.000 0.000 0.021 SSW 0.000 0.000 0.008 0.004 o.ooa 0.000 Q.aoo 0.000 0.000 0.012 SW 0.000 0.000 0.000 0.006 0.009 0.000 0.000 O.OOQ 0.000 0.015 WSW 0.000 0.000 0.000 0.013 0.012 0.000 0.000 0.000 0.000 0.025 W 0.000 0.000 0.000 0.007 0.031 0.000 0.000 0.000 0.000 0.038 WNW 0.000 a.ooo 0.000 0.000 Q.Q20 0.026 0.000 0.000 0.000 0.046 NW 0.000 0.000 0.000 O.OOQ 0.026 0.023 0.010 0.000 O.ODO 0.058 NNW 0.000 0.000 0.000 0.000 0.013 0.009 o ~ ooo 0.000 O.oaa 0.022 SUBTOTAL o.aoo 0.000 0.011 0. 077 0.125 0.057 0.010 0.000 0.000 0.280 TOTAL HOURS OF VALID OBSERVATIONS 2036.000 TOTAL HOURS OF GROUND LEVEL RELEASE 93.700 TOTAL HOVRS OF STABILITY CLASS C 15.190 TOTAL HOURS OF GROUND LEVEL STABZLZTY CLASS C 5.710 C

METEOROLOGICAL FACILITY: BROWNS FERRY NVCLEAR PLANT STABILITY BASED ON DELTA T BETWEEN 10 03 AND 45 30 METERS WIND DIRECTZON MEASURED AT 10.42 METER LEVEL WZND SPEED MEASURED AT 10 EFFLUENT VELOCITY

'2 12.60 M/S METER LEVEZ DATE PRINTED: 21-OCT-93 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROVNDED NUMBERS

SPLIT JOINT PERCENTAGE FREQUENCIES OP WIND SPEED BY WIND DIRECTION POR STABILITY CLASS D (-1.5< DELTA T<66-0.5 C/100 M)

BROWHS PERRY NUCLEAR PLANT PART 1 OP 2 GROUND LEVEL RELEASE MODE JUL 1, 93 - SEP 30, 93 WIND WIND SPEED(MPH)

DIRECTION CALM 6 . 6-1 .6 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 H 0.000 0.000, 0.000 0.033 0.056 0.028 0.'030 0.000 0.000 0.147 HHE 0.000 0.000 0.000 0.014 0.018 0.019 0.000 0.000 0.000 0.051 NE 0.000 a.ooo 0.000 0.009 0.013 0.000 0.025 0.000 0.000 0.047 EHE 0.000 0.000 o.oao 0.009 0.008 0.000 0.000 0.000 0.000 0.017 E 0.000 0.000 0.002 0.001 0.005 0.000 0.000 0.000 0.000 0.009 ESE 0.000 0.000 0.000 0.005 0.000 0.000 o.aoo 0.000 0.000 0.005 SE 0.000 0.000 0.016 0.021 0.008 0.000 0.000 0.000 0.000 0.046 SSE 0.000 0.004 0.050 0.141 0.000 0.000 0.000 0.000 0.000 0.196 S 0.000 0.000 0.112 0.170 0.000 0.000 0.000 0.000 0.000 0.282 SSW 0.000 0.001 0.074 0.065 0.000 0.000 0.000 0.000 0.000 0.141 SW o.ooa 0.000 0.017 0. 021. 0.000 0.000 0.000 0.000 0.000 0.038 WSW 0.000 O.OQO 0.013 0.106 0.018 0.000 0.000 0.000 0.000 0.137 W 0.000 0.000 0.005 0.044 0.081 0.029 0.000 0.000 0.000 0 ~ 159 WHW 0.000 0.000 0.001 0.016 0.046 0.078 0.000 0.000 0.000 0.141 NW ,0. 000 0.000 0.000 0.003 0.037 0.077 O.Q43 0.000 0.000 0 ~ 161 NNW 0. 000 0.000 0.000 0.013 0.045 0.025 0.000 0.000 0.000 0.083 SUBTOTAL 0.001 0.006 0.290 0.672 0.335 0.255 0.098 0 ~ 000 0.000 1 '58 TOTAL'OURS OF VALID OBSERVATIONS 2036.000 TOTAL HOURS OF GROUND IEVEL RELEASE 93.700 TOTAL HOURS OP STABILITY CLASS D 1136.070 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS D 33.760 METEOROLOGICAL FACILITY: BROWNS PERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASVRED AT 10 '2 METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRZNTED: 21-OCT-93 NOTE TOTALS AND SVBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-32

SPLIT JOINT PERCENTAGE FREQUENCIES OF'IND SPEED BY WIND DIRECTIOH FOR STABILITY CLASS E t 0. 5< DELTA T<~ 1. 5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JUL 1, 93 - SEP 3Q, 93 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 ' 18.5-24 ' >a24.5 TOTAL N 0.000 0.000 0.002 0.030 0.014 0.009 0.000 0.000 0.000 0.056 NNE 0.000 0.002 0.017 0.014 0.007 0.000 0.024 0.000 0.'000 0.064 NE 0.000, 0.000 0.000 0.011 0.007 0.009 0.000 0.000 0.000 0.028 ENE 0.000 0.000 0.003 0.001 0.000 0.000 0.000 0.000 0.000 0.004 E 0.000 0.004 0.003 0.018 0.000 0.000 0.000 0.000 0.000 0.025 ESE 0.001 0.000 0.039 0.010 0.000 0.000 0.000 0.000 0.000 0.049 SE 0.001 0.000 0.064 o.a18 0.000 0.000 0.000 0.000 0.000 0.084 SSE 0.001 0.000 0.037 0.056 0.000 0.000 0.000 0.000 0.000 0.094 S 0.002 0.004 O.O84 0.019 0.021 0.000 0.000 0.000 0.000 0.130 SSW 0.001 0.000 0.048 0.024 0.010 0.023 Q.aaa O.QOO o.aoo 0.105 SW 0.000 0.001 0.011 0.004 0.000 0.000 0.000 0.000 0.000 0.016 WSW o.oao 0.000 0.001 o.ao6 0.000 0.000 0.000 0.000 0.000 0.007 W 0.000 0.000 0.003 0.026 0.000 0.000 0.000 0.000 0.000 0.029 WNW 0.000 0.000 0.000 0.005 0.000 0.009 0.000 0.000 0.000 0.015 NW 0. 000. 0.000 0.003 0.005 Q.017 0.024 0.012 o.aoo 0.000 0.062 NNW 0.000 0.000 0.013 0.060 0.013 0.009 0.000 0.000 0 ~ 000 0.096 SUBTOTAL 0.006 0.011 0.329 0.308 0.091 0.083 0.035 o.oao 0.000 0.864 TOTAL HOURS OF VALID OBSERVATIONS 2036.000 TOTAL HOURS OF GROUND IEVEL RELEASE 93.700 TOTAL HOURS OF STABILITY CLASS E 637.690 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS E 17.590 METEOROLOGICAL FACZIITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10*42 METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCITY ~ 12 '0 M/S DATE PRINTED: 21-OCT-93 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-33

SPLIT JOZNT PERCENTAGE FREQUENCIES OP WIND SPEED BY WIND DIRECTION POR STABILITY CLASS F ( 1 5< DELTA T< 4 0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL REIEASE MODE JUL 1, 93 SEP 30, 93 WIND DIRECTION CALM 0.6-1.4 1.5-3.4 i.i-i.i WIND SPEED(MPH)

SOS-V.4 7.5-12.4 12.5-18.4 18.5-24.4 >~24.5 TOTAL N 0.000 0.000 0.065 0.035 0.005 0.000 0.000 0.000 0.000 0.106 NilE 0.000 0.000 0.039 0.057 0.000 0.000 0.000 0.000 O.OOQ D.a96 NE 0.000 0.002 0.009 0.006 0.017 0.000 0.000 0.000 0.000 0.034 ENE 0.000 0.000 0.009 0.015 O.OOQ 0.000 o.aoo 0.000 0.000 0.025 E 0.000 0.000 0.004 0.007 0.000 0.000 0.000 0.000 0.000 0.011 ESE 0.000 O.OQ2 0.008 0.003 0.000 0.000 0.000 0.000 O.ODO 0.014 SE 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.003 SSE O.OOD 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.006 0.009 0.000 0.000 0.000 0.000 0.000 0.000 0.015 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.005 0.000 0.000 O.OQO o.oao 0.000 0.005 WSW 0.000 0.000 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.005 W 0.000 0.000 O.QOO o.ooa 0.000 0.000 0.000 O.ODO 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.000 0.005 NNW 0.000 0.000 0.025 0.025 0.008 0.000 0.000 0.000 0.000 0.058 SUBTOTAL 0.000 0. 011 0. 171 0.159 0.036 0.000 0.000 0.000 O.OQO 0. 3'I8 TOTAL HOURS OF VALID OBSERVATIONS 2036.000 TOTAL HOURS OF GROUND LEVEI RELEASE 93.700 TOTAL HOURS OF STABILITY CLASS F 158.800 TOTAL HOURS OF GROUND LEVEL STABILZTY CLASS P 7.700 METEOROLOGICAL PACZLITY: BROWNS PERRY NUCLEAR PLANT STABILZTY BASED ON DELTA T BETWEEN 10+03 AND 45 30 METERS WIND DZRECTZON MEASURED AT 10.42 METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRINTED: 21-OCT-93 NOTE TOTALS AND SUBTOTALS ARE OBTAZNED FROM UNROUNDED NUMBERS El-34

SPLIT BOINT PERCENTAGE FREQUENCIES OF WZND SPEED BY WIND DIRECTION FOR STABZI ITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JUL 1, 93 - SEP 30, 93 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 0.001 0.008 0.081 0.034 a.aoo 0.000 0.000 0. 000 0.000 0.124 NNE 0.001 0.000 0.089 0.213 0.009 0.000 0.000 0.000 0.000 0.312 NE 0.000 0.000 0.007 0.000 0.000 0.000 0.000 0.000 0.000 0.007 ENE 0.000 0.000 0.008 0.006 0.000 o.aaa 0.000 0.000 0.000 0.014 E 0.000 0.000 0. 014 0.020 0.000 0.000 0.000 0.000 0.000 0.034 ESE 0.000 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.002 SE 0.000 0.000 0.004 0.000 0.000 Q.QQQ o.oaa 0.000 0.000 0.004 SSE 0.000 0.000 0. 001 0.000 0.000 0.000 0.000 0.000 0.000 0. 001 5 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 ~ 000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 Q.QQQ 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW a.ooo 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Q.QQQ Q.oaa 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW o.ooa o.aao 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Q.QQQ o.ooa SUBTOTAL 0.003 0.010 0. 206 0.273 0.009 0.000 0.000 0.000 0.000 0.500 TOTAL HOURS OP VALID OBSERVATIONS 2036.000 TOTAL HOURS OF GROUND LEVEZ RELEASE 93.7aa TOTAL HOURS OF STABILITY CLASS G 68.570 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS G 10.190 METEOROLOGICAL PACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45-30 METERS WIND DZRECTZON MEASURED AT 10.42 METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EFPLUENT VELOCITY ~ 12 '0 M/S DATE PRINTED: 21-OCT-93 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED PROM UNROUNDED NUMBERS

Radiological Impact Assessment Browns Ferry Nuclear Plant July - December 1993 Table 9 Joint Frequency Distribution in Percent for Split Level Releases Ground Level Portion Fourth Quarter f

El-36'

SP) ZT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WZND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1 ~ 9 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 93 DEC 31, 93 WIND WIND SPEED{MPH)

DIRECTION CALH 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5<<18.4 18.5-24.4 >~24.5 TOTAL N 0.000 0.000 0.000 ~

0.000 0.000 0.037 0.038 0.000 0.000 0.075 NNE 0.000 0.000 0.000 0.000 0.005 0.046 0.000 0.000 0.000 0.051 NE 0.000 0.000 0.000 0.000 0.000 0.013 0.000 0.000 0.000 0.013 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.020 0.011 0.000 0.000 0.000 0.000 0.031 SE 0.000 0.000 0.008 0.023 0.022 0.000 0.000 0.000 0.000 0,053 SSE 0.000 0.000 0.004 0.106 0.000 0.000 0.000 0.000 0.000 0.110 S 0.000 0.000 0.001 0.011 0.016 0.000 0.000 0.000 0.000 0.028 SSW 0.000 0.000 0.000 0.026 0.017 0.000 0.000 0.000 0.000 0.042 SW 0.000 0.000 0.000 0.027 0.000 0.000 0.000 0.000 0.000 0.027 WSW 0.000 0.000 0.000 0.017 0.021 0.000 0.000 0.000 0.000 0.038 W 0.000 0.000 0.000 0.000 0.000 0.000 0.009 0.000 0.000 0.009 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.009 0.000 o.noo 0.009 NW 0.000 0.000 0.000 0.000 0.007 0.000 0.000 0.000 0.000 0.007 NNW 0.000 0.000 0.000 0.000 0.000 0. 015 0.009 0.000 0.000 0.024 SUBTOTAL 0.000 0.000 0.013 0.230 0.100 0.111 0.065 0.000 0.000 0.518 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF GROUND LEVEL RELEASE 227.960 TOTAL HOURS OF STABILITY CLASS A 11.340 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS A 11.340 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA T BETWEEN 10 '3 WIND DIRECTION HEASURED AT 10.42 METER LEVEL AND 45.30 METERS WIND SPEED MEASURED AT 10.42 HETER LEVEL EFFLUENT VEI OCITY ~ 12.60 H/S DATE PRINTED: 24-JAN-94 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUHBERS E1-,37.

SPLZT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DELTA T<ss-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 93 DEC 31, 93 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >>24. 5 TOTAL N 0.000 0.000 0.000 0.001 0.012 0.029 0.035 0.000 0.000 0.077 NNE 0.000 0.000 0.000 0.000 0.005 0.026 0.000 0.000 0.000 0.032 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 -0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.006 0.005 0.000 0.000 0.000 0.000 0.011 SE 0.000 0.000 0 F 005 0.009 0.008 0.000 0.000 0.000 0.000 0.022 SSE 0.000 0.000 0.000 0.006 0.000 0.000 0.000 0.000 0.000 0.006 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.005 0.012 0.000 0.000 0.000 0.000 0.018 W 0.000 0.000 0.000 0.000 0.000 0 009 0.000 0.000 0.000 0.009 WNW 0.000 0.000 0.000 0.000 0.000 0.024 0.000 0.000 0.000 0.024 NW 0.000 0.000 0.000 0.000 0.023 0.025 0.000 0.000 0.000 0.048 NNW 0.000 0.000 0.000 0.001 0.003 0.021 0.000 0.000 0.000 0.026 SUBTOTAL 0.000 0.000 0.005 0.030 0.069 0.134 0.035 0.000 0.000 0.272 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF GROUND LEVEL RELEASE 227.960 TOTAL HOURS OF STABILITY CLASS B 8.780 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS B 5.960 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.42 HETER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCITY I 12.60 M/S DATE PRINTED: 24-JAN-94 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El- 38

SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C {-1. 7< DELTA T<=-1. 5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 93 DEC 31, 93 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >~24.5 TOTAL N 0.000 0.000 0.000 0.000 0.000 ,0.023 0.000 0.000 0.000 0.023 NNE 0.000 0.000 0.000 0.000 0 '07 0.006 0.000 0.000 0.000 0.013 NE 0.000 0.000 0.000 0.001 0.002 0.014 0.000 0. 000 0.000 0. 017 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.000 0.005 SE 0.000 0.000 0.006 0.007 0.009 0.000 0.000 0.000 0.000 0.022 SSE 0.000 0.000 0.000 0.017 0.042 0.000 0.000 0.000 0.000 0.059 S 0.000 0.000 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.002 SEW 0.000 0.000 0.005 0.002 0.000 0.000 0.000 0.000 0.000 0.007 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 F 000 0.000 0.000 0 F 000 W 0.000 0.000 0.000 0.002 0.009 0.000 0.000 0.000 0.000 0.011 WNW 0.000 0.000 0.000 0.000 0.005 0.037 0.018 0.000 0.000 0.060 NW 0.000 0.000 0.000 0.000 0.013 0.026 0.009 0.000 0.000 . 0.048 NNW 0.000 0.000 0.000 0.000 0.013 0.000 0.000 0.000 0.000 0.013 SUBTOTAL 0.000 0.000 0.014 0.034 0.099 0. 107 0.026 0.000 0.000 0.280 TOTAL HOURS OF VALID OBSERVATIONS 2190;000 TOTAL HOURS OF GROUND LEVEL RELEASE 227.960 TOTAL HOURS OF STABILITY CLASS C 12.670 TOTAL HOURS OF GROUND LEVEI STABILITY CLASS C 6.140 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABZLITY BASED ON DELTA-T BETWEEN 10 '3 WIND DIRECTION MEASURED AT 10.42 METER LEVEL AND 45.30 METERS WIND SPEED MEASURED AT '0.42 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRINTED: 24-JAN-94 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El- 39

SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DZRECTZON POR STABILITY CLASS D {-1.5< DELTA T<~-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 93 DEC 31, 93 WIND WIND SPEEDtMPH)

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 >a24.5 TOTAL N 0.000 0.000 0.000 0.017 0.065 0.261 0.089 0.000 0.000 0.433 NNE 0.000 0.000 0.000 0.021 0.032 0.058 0.105 0.000 0.000 0.216 NE 0.000 0.000 0.000 0.010 0.015 0.011 0.000 0.000 0.000 0.036 ENE 0.000 0.000 0.000 0.007 0.004 0.000 0.000 0.000 0.000 0.011 E 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.045 ESE 0.000 0.000 0.007 0.091 0.095 0.021 0.000 0.000 0.000 0.213 SE 0.000 0.000 0.029 0.019 0.106 0.022 0.000 0.000 0.000 0.176 SSE 0.000 0.000 0.098 0.131 0.055 0.000 0.000 0.000 0.000 0.284 S 0.000 0.000 0.086 0.076 0.016 0.000 0.000 0.000 0.000 0.179 SSW 0.000 0.000 0.003 0.071 0.000 0.000 0.000 0.000 0.000 0.074 SW 0.000 0.000 0.016 0.067 0.008 0.000 0.000 0.000 0.000 0.090 WSW 0.000 0.000 0.002 0.033 0.058 0.067 0.000 0.000 0.000 0.160 W 0.000 0.000 0.000 0.022 0.028 0.064 0.000 0.000 0.000 0. 115 WNW 0.000 0.000 0.000 0;000 0.036 0.256 0. 160 0.073 0.000 0.525 NW 0.000 0.000 0.000 0.009 0.027 0.342 0. 400 0.202 0.000 0.979 NNW 0.000 '0. 000 0.000 0.017 0.061 0.458 0.159 0.000 0.000 0.695 SUBTOTAL 0.000 0.000 0.241 0.638 0.606 1.561 0.913 0.274 0.000 4.232 I

TOTAL HOURS OP VALID OBSERVATIONS 2190.000 TOTAL HOURS OF GROVND LEVEL RELEASE 227.960 TOTAL HOURS OF STABZLITY CLASS D 1163.120 TOTAL HOURS OP GROUND LEVEL STABILITY CLASS D 92.690 METEOROLOGICAL FACILITY: BROWNS PERRY NVCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DZRECTION NEASVRED AT 10.42 METER LEVEL WIND SPEED NEASURED AT 10.42 METER LEVEL EFFLUENT VELOCZTY I 12.60 M/S DATE PRINTED: 24-JAN-94 NOTE: TOTALS AND SVBTOTALS ARE OBTAINED PROM UNROVNDED NUMBERS E1-40

SPLZT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABII.ITY CLASS E {-0.5< DELTA T<ii 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE HODE OCT 1, 93 DEC 31, 93 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 0.016 0.043 0.005 0.059 0.036 0.000 0.000 0.159 NNE 0.000 0.000 0.002 0.026 0.053 0.007 0.000 0.000 0.000 0.089 NE 0.000 0.000 0.002 0.006 0.005 0.000 0.000 0.000 0.000 0.014 ENE 0.000 0.000 0.000 0.012 0.000 0.000 0.000 0.000 0.000 0.012 E 0.000 0.000 0.002 0.104 0.006 0.000 0.000 0.000 0.000 0.112 ESE 0.000 0.000 0.030 0.153 0.108 0.026 0.000 0.000 0.000 0.316 SE 0.000 0.000 0.107 0.141 0.053 0.009 0.000 0.000 0.000 0.310 SSE 0.000 0.004 0.196 0.182 0.091 0.010 0.000 0.000 0.000 0.483 S 0.000 0.005 0.096 0.160 0.348 0.116 0.000 0.000 0.000 0.726 SSW 0.000 0.004 O.O48 0.045 0.000 0.000 0.000 0.000 0.000 0.097 SW 0.000 0.004 0.004 0.029 0.008 0.000 0.000 0.000 0.000 0.044 WSW 0.000 0.000 0.017 0.031 0.000 0.012 0.000 0.000 0.000 0.059 W 0.000 0.000 0.001 0.021 0.011 0.040 0.000 0.000 0.000 0.074 WNW 0.000 0.000 0.004 0.008 0.016 0.008 0.000 0.000 0.000 0.035 NW 0.000 0.000 0.004 0.000 0.000 0.071 0.059 0.000 0.000 0.134 NNW 0.000 0.000 0.005 0.067 0.054 0.165 0.026 0.000 0.000 0.316 SUBTOTAL 0.000 0.017 0.534 1.027 0.758 0.523 0.121 0.000 0.000 2.980 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL BOURS OF GROUND LEVEL RELEASE 227.960 TOTAL HOURS OF STABILITY CLASS E 726.060 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS E 65.260 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION HEASURED AT 10 42 HETER LEVEZ WIND SPEED MEASURED AT 10.42 HETER LEVEL EFFLUENT VELOCITY I 12.60 H/S DATE PRINTED: 24-JAN-94 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-41

SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DZRECTZON FOR STABILITY CLASS F ( 1.5< DELTA T<~ 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 93 DEC 31, 93 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 0.026 0.039 0.007 0.000 0.000 0.000 o.noo 0.073 NNE 0.000 0.000 0.022 0.042 0.066 0.009 0.000 0.000 0.000 0.140 NE 0.000 0.005 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0. 005.

ENE 0.000 0.002 0.013 0.006 0.000 0.000 0.000 0.000 0.000 0. 021 E 0.000 0.000 0.040 0.052 0.000 0.000 0.000 0.000 0.000 0.092 ESE 0.000 0.000 0.047 0.023 0.000 0.000 0.000 0.000 0.000 0.070 SE 0.000 0.026 0.097 0. 051 0.000 0.000 0.000 0.000 0.000 0.174 SSE 0.000 0.022 0.113 0.070 0.055 0.046 0.000 0.000 0.000 0.307 S 0.000 0.000 0.058 0.073 0.273 0.086 0.000 0.000 0.000 0.490 SSW 0.000 0.000 0.007 0.015 0.000 0.000 0.000 0.000 0.000 0.022 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW- .,0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.003 0.006 0.000 0.000 0.000 0.000 0.000 0.009 NNW 0.000 0.002 0.014 0.012 0.029 0.000 0.000 0.000 0.000 0.058 SUBTOTAL 0.000 0.057 0.442 0.390 0.431 0.141 0.000 , 0.000 0.000 1.460 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF GROUND LEVEL RELEASE 227.960 TOTAL HOURS OF STABILITY CLASS F 196.670 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS F 31.980 METEOROLOGICAL FACII ITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DEITA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTZON MEASURED AT 10. 42 METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCITY ~ 12.60 H/S DATE PRINTED: 24-JAN-94 NOTE: TOTALS AND SUBTOTALS ARE OBTAZNED FROM UNROUNDED NUMBERS El-42

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

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE OCT 1, 93 DEC 31, 93 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 >s24.5 TOTAL N 0.000 0.000 0.032 0.024 0.000 0.000 0.000 0.000 0.000 0.057 NNE 0.000 0.000 0.038 0.065 0.000 0.000 0.000 0.000 0.000 0.103 NE 0.000 0.000 0.052 0.006 0. 000 0.000 0.000 0.000 0.000 0.058 ENE 0.000 0.000 0.014 0.005 0.000 0.000 0.000 0.000 0.000 0.019 E 0.000 0.000 0.012 0.005 0.000 0.000 0.000 0.000 0.000 0. 017 ESE 0.000 0.000 0.014 0.000 0.000 0.000 0.000 0.000 0.000 0.014 SE 0.000 0.025 0.013 0.000 0.000 0.000 0.000 0.000 0.000 0.038 SSE 0.000 0.032 0.208 0.051 0.000 0.000 0.000 0.000 0.000 0.290 S 0.000 0.006 0.028 0.030 0.000 0.000 0.000 0.000 0.000 0.064 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.003 0.004 0.000 0.000 0.000 0.000 0.000 0.007 SUBTOTAL 0.000 0.063 0.414 0.189 0.000 0.000 0.000 0.000 0.000 0.666 TOTAL HOURS OF VAIID OBSERVATIONS 2190.000 TOTAL HOURS OP GROUND LEVEL RELEASE 227.960 TOTAL HOURS OP STABILITY CLASS G 71. 360 TOTAL HOURS OF GROUND LEVEL STABZIZTY CIASS G 14.590 METEOROLOGICAL PACZLITY: BROWNS PERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AHD 45.30 METERS WIND DIRECTION MEASURED AT 10.42 NETER LEVEL WIND SPEED NEASURED AT 10.42 METER LEVEL EPPLUENT VELOCITY 12.60 N/S DATE PRINTED: 24-JAN-94 NOTE TOTALS AND SUBTOTALS ARE OBTAINED FRON UNROUNDED NUMBERS El-43

Radiological Impact Assessment Browns Ferry Nuclear Plant July - December 1993 Table 10 Joint Frequency Distribution in Percent for Split Level Releases Elevated Level Portion Third Quarter El-44

SPLIT JOINT PERCENTAGE FREQUENCIES OP WIND SPEED BY WIND DIRECTZON POR STABILITY CLASS A (DELTA T<~-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JUL 1 ~ 93 SEP 3Q 3 93 WIND WIND SPEED(MPH)

DIRECTION CALM 0. 6-1. 4 1.5-3.4 3.5-5.4 5.5-'l.4 7 ~ 5-12 ~ 4 12 ~ 5-18 ~ 4 18 5-24 -4 >3I24. 5 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.OQO NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE a.ooo 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 o.oao 0.000 O.oaa 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0,000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 o.ooa 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 o.aao WSW O.OOD 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 ~ 000 0.000 WNW 0.000 0.000 O.QOO a.ooo 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 O.OQO a.aao 0.000 O.aaa 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 TOTAL HOURS OF VALID OBSERVATIONS 2036.000 TOTAL HOURS OP ELEVATED RELEASES 1942.300 TOTAL HOURS OF STABILITY CLASS A 13.040

'TOTAL HOURS OP ELEVATED STABILITY CLASS A 0.000 METEOROLOGICAL PACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.67 METER LEVEL WIND SPEED MEASURED AT 45.67 METER LEVEL EPPLUENT VELOCITY ~ 12.60 M/S DATE PRIHTED: 21-OCT-93 NOTE. TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-.45

SPLIT JOINT PERCENTAGE FREQUENCIES OP WIND SPEED BY WZND DIRECTION POR STABILITY CLASS B (-1.9< DELTA T<~ 1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE NODE JVL 1, 93 - SEP 30, 93 WIND WIND SPEED(MPH)

DZRECTZON CALM 0.6-1.4 3.3-3.4 3.5-5.4 5.5-7.4 '7.5-12.4 12.5-18.4 18.5-24.4 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0. 000'.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 Q.QOO a.ooo 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 O.OQO 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 O.DOO O.OOD 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 O.OQO o.oaa a.ooo 0.000 0.000 0.000 O.DOO 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.OQO S S'W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 a.ooo 0.000 0.046 0.000 O.ODO 0.000 0.000 0.046 WSW 0'. 000 0.000 0.000 0.000 0.000 o.oao 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.QOO WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW Q.OOQ 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 O.OOQ 0.000 0.000 0.000 0.000 0.000 SVBTOTAL 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 TOTAL HOURS OF VALID OBSERVATIONS 2036.000 TOTAL HOURS OF ELEVATED RELEASES 1942.300 TOTAL HOURS OF STABILITY CLASS B 6.640 TOTAL HOURS OF ELEVATED STABILITY CZASS B 0.930 METEOROLOGICAL FACILITY: BROWNS PERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.67 METER LEVEL WIND SPEED MEASURED AT 45.67 METER LEVEL EFPLUENT VELOCITY ~ 12. 60 M/S DATE PRINTED: 21-OCT-93 NOTE'OTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-46

SPI IT JOINT PERCENTAGE FREQUENCIES OP WIND SPEED BY WIND DIRECTION POR STABILITY CLASS C (-1.7< DELTA T<22-1.5 C/100 Ml BROMNS FERRY NUCLEAR PLANT PART 2 OP 2 ELEVATED RELEASE MODE JUL 1, 93 - SEP 30, 93 WIND WIND SPEED(MPH)

DIRECTION CALM 6.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 24.6 TOTAI N 0.000 o.aoo 0.000 0.000 O.ODO 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 o.aoa 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.aao 0.000 EHE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 D.DQD o.aoa 0.000 0.000 0.000 0.000 0.000 0.000 0.000

~ SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSM 0.000 0.000 0.000 0.000 O.O47 0.044 0.000 0.000 0.000 0.091 SW 0.000 0.000 O.ooa 0.098 0.000 0.179 0.000 0.000 0.000 0.277 WSW 0.000 0.000 0.000 0.049 0.000 0.000 a.aoo 0.000 0.000 0.049 W 0.000 0.000 0.000 0.000 0.049 0.000 0.000 0.000 0.000 0.049 WHW O.OOD 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 HM 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 tittW 0.000 0.000 0.00Q 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.147 0.096 0.222 0.000 0.000 0.000 0.466 TOTAL HOURS OF VALID OBSERVATIONS 2036.000 TOTAL HOURS OP ELEVATED RELEASES 1942.300 TOTAL t(OURS OF STABILITY CLASS C 15.190 TOTAL HOURS OF ELEVATED STABILITY CLASS C 9.480 METEOROLOGICAL PACILITY: BROWNS PERRY NUCLEAR PLANT STABILITY BASED OH DELTA-T BETWEEN 45. 30 AND 89. 59 METERS WIND DZRECTZON MEASURED AT 45.67 METER LEVEL WIND SPEED MEASURED AT 45.67 METER LEVEL EFPLUEHT VELOCZTY ~ 12.60 M/S DATE PRINTED: 21-OCT-93 NOTE: TOTALS AND.SUBTOTAIS ARE OBTAINED PROM UNROUNDED NUMBERS

~ '

SPLZT JOINT PERCENTAGE FREQUENCIES OP WIND SPEED BY WIND DIRECTION POR STABILITY CLASS D (-1. 5< DELTA T<=-0. 5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OP 2 ELEVATED RELEASE MODE JVL 1, 93 SEP 30, 93 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3 ' 5.5-5.4 5.5-7 ' 7.5-12 ' 12.5-18.4 18.5-24.4 74.5 TOTAL N 0.003 0.000 0.344 0. 491 0.994 0.954 0.040 0.019 0.000 2.846 NNE 0.003 0.000 0.344 0.393 O.BS4 0.435 0.039 0.050 0.000 2.117 NE 0.002 a.ooo 0.196 o.s4o 0.281 0.130 0.000 D.aaa 0.000 1 ~ 149 ENE 0.001 0.049 0.049 0.196 0.284 0.088 0.000 0.000 0.000 0.668 E 0.002 0.098 0.098 0.246 0.048 0.000 0.000 0.000 0.000 0.491 ESE 0.002 0;000 0.295 0.295 0.144 0.133 0.000 a.ooo 0.000 0.869 SE 0.014 0.000 1.768 1.130 0.478 0.305 0.081 0.000 0.000 3.776 SSE 0.016 0.098 1.866 1.768 0.382 1.552 1.0'79 0.074 0.000 6.834 S 0.013 0.000 1.670 1.375 0.751 2.154 0.680 0.196 0.012 6.851 S S'W 0.012 ~ 0.147 1.375 1.621 0.526 0.746 0.080 0.039 0.000 4.546 SW 0.010 0.098 1.179 1.621 0.523 1.041 0.0&1 a.ooo 0.000 4.552 WSW 0.005 0.000 0.639 1.670 1.289 0.529 0.000 0.000 0.000 4.131 W o.oa6 0.098 0.688 1.670 1.756 1. 005 O.D40 0.000 0.000 5.264 WNW 0.003 0.000 0.393 0.688 1.081 1.304 0.160 0.000 0.000 3.629 NW 0.003 0.049 0.344 0.737 0.515 1.735 0.400 0.016 0.000 3.799 NNW 0.003 0.049 0.344 0.442 O.&04 0.815 0.161 0.000 O.ooa 2.618 SUBTOTAL 0.098 0.688 11.591 14. 882 10. 710 12.925 2.842 0.393 0. 012 S4.141 TOTAI HOURS OP VALID OBSERVATIONS 2036.000 TOTAL HOVRS OF ELEVATED REZ EASES 1942.300 TOTAL HOVRS OP STABILITY CLASS D 1136.070 TOTAL HOURS OF ELEVATED STABZLZTY ClASS D 1102.310 METEOROLOGICAL FACILITY: BROWNS PERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45-30 AND 89 ~ 59 METERS WIND DIRECTION MEASURED AT 45 ~ 67 METER LEVEL WIND SPEED MEASURED AT 45.67 METER LEVEL EFFZUENT VELOCITY ~ 12.60 M/S DATE PRINTED: 21-OCT-93 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED PROM UNROUNDED NUMBERS El-48

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

BROWNS PERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JUL 1, 93 SEP 30, 93 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 0.147 0.442 0.540 0.620 0.705 0.162 0.000 0.000 2.616 NNE 0.000 0.049 0.540 0.246 0.326 0.394 0.000 0.000 0.000 1.556 NE 0.000 0.049 0.295 0.246 0.516 0.087 0.080 0.000 0.000 1.272 ENE 0.000 0.000 0.491 0.295 0.190 0 '91 0.000 0 000 0.000 1.067 E 0.000 0.049 0.491 0.589 0.141 0.219 0.000 0.000 0.000 1 490 ESE 0.000 0.000 0.737 0.737 0.284 0.000 0.000 0.000 0.000 1. 758 SE 0.000 0.098 0.835 0.835 0.571 o.o44 0.000 0.000 0.000 2.383 SSE 0.000 0.000 1.375 0.639 0.332 0.1'77 0.320 0.039 0.000 2.881 S 0.000 0.098 0.933 0.639 0.048 0.341 0.200 0.027 0.000 2.285 SSW 0.000 0.196 0.835 1.179 0.528 0.353 0.040 0.037 0.000 3*169 SW 0.000 0.147 0.737 1. 179 0.335 0.041 0.000 0.000 0.000 2.440 WSW 0.000 0.098 0.786 0.589 0.144 0.000 0.040 0.000 0.000 1.658 W o.ooo 0.049 0.295 0.540 0.420 0.175 0.041 0.000 0.000 1.520 WNW 0.000 0.049 0.098 0.393 0.329 0.045 0.000 0.000 0.000 0.914 NW 0.000 0.000 0.442 0.344 0.287 0.304 0.000 0.037 0.000 1.414 tr Nw 0.000 0.049 0.344 0.393 0.467 0.702 0.081 o.ooo 0.000 2.036 SUBTOTAL 0.000 1.081 9.676 9.381 5.539 3.677 0.964 0.140 0.000 30.457 TOTAL HOURS OF VArID OBSERVATZONS 2036.000 TOTAL HOURS OF ELEVATED RELEASES 1942.300 TOTAL HOURS OF STABILITY CLASS E 637.690 TOTAr. HOURs OF Er.EVATFD STABILITY Cr.Ass F. 620.100 METEORDLOOICAI FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DEZTA-T BETWEEN 45.30 AND 89.59 METERS WZND DZRECTION MEASURED AT 45.67 METER LEVEL WIND SPEED MEASURED AT 45.67 METER LEVEL EFFLUENT VELOCITY 12.60 M/S DATE PRINTED: 21-OCT-93 NOTE TOTALS AND SUBTOTALS ARE OBTAZNED FROM UNROUNDED NUMBERS EC-49

SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DZRECTZON FOR STABZLZTY CLASS F ( 1.5< DELTA T<~ 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JUL 1 I 93 SEP 30 ~ 93 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 '7 12 ~ 4 12 . 5-18 ~ 4 18 ~ 5-2 4 - 4 >~24.5 TOTAL N 0.000 0.000 0 ~ 000 0.049 0.236 0.429 0.041 0.000 0.000 0.755 NNE 0.000 0.000 0.147 0.196 0.048 0.824 0.081 0.000 0.000 1.297 NE 0.000 Q.QQQ 0. 147 0.246 0.335 0.434 0.041 0.000 0.000 1.203 ENE 0.000 0.000 0.000 0.000 0.335 0.174 0.000 Q.aoa 0.000 0.509 E 0.000 0.000 0.049 0.098 0.239 0. 133 0.000 0.000 0.000 0.519 ESE 0.000 0.000 0.000 0.147 0.286 0.000 0.000 0.000 0.000 0.433 SE 0.000 0.049 0.000 0.196 0.095 0.089 0.000 0.000 0.000 0.430 SSE 0.000 0.049 0.098 0.098 0.238 0.000 0.000 0.000 a.aao 0.483 S 0.000 0.000 0.049 0.000 0.094 0.000 0.000 0.000 0.000 0.143 SEW 0.000 0.000 0.098 0.344 0.000 0.044 0.000 0.000 0.000 0.486 SW 0.000 0.000 0. 196 0.196 0.000 a.044 0.000 0.000 0.000 0.437 WSW 0 ~ 000 0.000 0.098 '0. 147 0.095 0.000 0.000 0.000 0.000 0.341 W 0.000 0.000 0.000 0.049 0.000 0.000'.000 0.000 0.000 0.000 0.049 WNW Q.aoa 0.000 0.049 o.aoo 0.000 0.000 0.000 0.000 0.049 NW 0.000 0.000 0.000 0.049 0.000 0.000 0.000 0.000 0.000 0.049 NNW 0.000 0.000 0.049 0.049 0.096 0.044 0.000 0.000 0.000 0.238 SUBTOTAL Q.QQQ 0.098 0.982 1.866 2.097 2.215 0.163 0.000 0.000 7.421 TOTAL HOURS OF VALID OBSERVATIONS 2036.000 TOTAL HOURS OF ELEVATED RELEASES 1942.300 TOTAL HOURS OF STABILITY CLASS F 158.800 TOTAL HOURS OF ELEVATED STABZLITY CLASS F 151. 100 METEOROLOGICAL FACILITY BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND S9-59 METERS WIND DIRECTION MEASURED AT 45.67 METER LEVEZ WIND SPEED MEASURED AT 45.67 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRINTED: 21-OCT-93 NOTE: TOTALS AND SUBTOTALS ARE OBTAZNED FROM UNROUNDED NUMBERS E1-50

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

BROWNS FERRY NUCLEAR PLANT PART 2 Of 2 ELEVATED RELEASE MODE JUL 1, 93 - SEP 30 '3 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >~24.5 TOTAL N 0.000 0.000 0.000 0.000 0.145 0. 261 O.O82 0.000 0.000 0.488 NNE a.oao 0. 000 0.000 0.147 0.426 0.295 0.244 0.000 0.000 1. 112 NE 0.000 0.000 0.000 0.196 0.144 0.304 0.000 0.000 0.000 0.644 ENE 0.000 0.000 0.000 0.000 0.000 o.ooa 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.049 0.000 0.094 0.000 0.000 0.000 0.000 0.143 SE 0.000 0.000 0.098 0.098 0.096 0.044 0.000 0.000 0.000 0.336 SSE 0.000 0.000 0.000, 0.049 0.094 0.000 0.000 0.000 0.000 0.143 S 0.000 0.000 O.OQO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 o.aao 0.000 0 ~ 000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.QQO 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0 ~ 000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW a.oao 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 O.QOO a.ooo 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 O.QQQ 0.000 0.000 0.000 a.ooo 0.000 SUBTOTAL 0.000 0.000 0.147 0.491 0.999 0.904 0.326 0.000 0.000 2.867 TOTAL HOURS OF VALZD OBSERVATIONS 2036.000 TOTAL HOURS OF ELEVATED RELEASES 1942.300 TOTAL HOURS OF STABILITY CLASS G 68.570 TOTAL HOURS OF ELEVATED STABILITY CLASS G 58.380 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABZLITY BASED ON DELTA-T BETWEEN 45.30 AND 89.59 METERS WIND DIRECTION MEASURED AT 45 67 METER LEVEL WIND SPEED MEASURED AT 45 ~ 67 METER LEVEL EFFLUEHT VELOCITY ~ 12.60 M/S DATE PRINTED: 21-OCT-93 NOTE. TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Radiological impact Assessment Browns Ferry Nuclear Plant July - December 1993 Table 11 Joint Frequency Distribution in Percent for Split Level Releases Elevated Level Portion Fourth Quarter El-52

SPLIT JOINT PERCENTAOE FREQUENCIES OF WIND SPEED BY WIND DIRECTZON FOR STABILITY CLASS A {DELTA T<~-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 93 DEC 31, 93 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >>24.5 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0. 000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0. 000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0. 000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.'000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0. 000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 F 000 0.000 0.000 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF ELEVATED REI EASES 1962.040 TOTAL HOURS OF STABILITY CLASS A 11.340 TOTAL HOURS OF ELEVATED STABILITY CLASS A 0.000 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABZLZTY BASED ON DELTA-T BETWEEN 45 '0 WIND DIRECTION MEASURED AT 45 67 METER LEVEL AND 89.59 METERS WIND SPEED MEASURED AT 45.67 METER LEVEL EFFLUENT VELOCITY m 12.60 M/S DATE PRINTED: 24-JAN-94 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-53

SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DZRECTION FOR STABILITY CI ASS B t-1.9< DELTA T<~-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 93 DEC 31, 93 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 TOTAI N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 o.ooo 0.000 NE 0.000 0.000 0.000 0.000 0. 000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0. 000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.041 0.000 0.000 0.000 0.041 SW 0.000 0.000 0.000 0.046 0.000 0.042 0.000 0.000 0.000 0.088 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.'000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 F 000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.046 0.000 0.083 0.000 0.000 0.000 0.129 TOTAL HOURS OF VALID'OBSERVATIONS 2190.000 TOTAL HOURS OF ELEVATED RELEASES 1962.040 TOTAL HOURS OF STABILITY CLASS B 8.780 TOTAL .HOURS OF EI EVATED STABILITY CLASS B 2.820 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89.59 METERS WIND DZRECTZON MEASURED AT 45 '7 METER LEVEL WIND SPEED MEASURED AT 45.67 METER LEVEL EFFLUEHT VEIOCITY ~ 12.60 M/S DATE PRINTED: 24-JAN-94 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUHBERS El-54

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

BROWNS FERRY NUCLEAR PIANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 93 DEC 31, 93 WIND WIND SPEED(MPN)

DZRECTZON CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >~24.5 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.041 0.000 0.000 0.000 0.041 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 SSW 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 SW 0.000 0.000 0.000 0.000 0.045 0.080 0.000 0.000 0.000 0.125 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.041 0.000 0.000 0.000 0.041 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 tltiW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAl 0.000 0.000 0.000 0.046 0.090 0.162 0.000 0.000 0.000 0.298 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF ELEVATED RELEASES 1962.040 TOTAL HOURS OF STABILITY CLASS C 12.670 TOTAL HOURS OF ELEVATED STABZLZTY CLASS C 6.530 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45 30 AND 89.59 METERS WIND DIRECTION HEASURED AT 45. 67 HETER LEVEL WIND SPEED HEASURED AT 45.67 METER LEVEL EFFLUENT VELOCITY ~ 12. 60 H/S DATE PRINTED: 24-JAN-94 NOTE: TOTALS AND SUBTOTALS ARE OBTAZNED FROM UNROUNDED NUHBERS

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

BROWNS FERRY NVCZEAR PLANT PART 2 OF 2 EZEVATED RELEASE MODE OCT 1, 93 DEC 31, 93 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 TOTAL N 0.002 0.046 0.183 0.183 0.707 1.316 1.342 0.174 0.000 3.952 NNE 0.002 0.046 0.183 0.457 0.662 1.234 0.300 0.026 0.015 2.925 NE 0.002 0.046 0.183 0.594 0.488 0.243 0.038 0.000 0.000 1.593 ENE 0.001 0.046 0.091 0.411 0.268 0.042 0.000 0.000 0.000 0.859 E 0.002 0.000 0.183 0.183 0.217 0.164 0.000 0 ~ 000 0.000 0.749 ESE 0.003 0.000 0.274 0.548 0.435 1.169 0.074 0.025 0.000 2.527 SE 0.010 0.046 1.050 1.370 0.439 1.230 1.263 0.085 0.004 5.496 SSE 0.005 0.046 0.502 0.776 0.528 1.348 1.228 0.056 0.000 4.489 S 0.004 0.004 0.046 0.000 0.365 0.411 0.731 0.622 0.884 0.668 0 '63 0.020 3.802 SSW 0.411 0.439 0.836 0.485 0.101 0.000 2.687 SW 0.003 0.000 0.365 0. 411 0.352 0.878 0. 33'7 0.000 0.000 2.346 WSW 0.002 0.000 0.228 0.548 0.357 0.521 0.373 0 F 000 0.000 2.029 W 0.001 0.001 0.000 0.000 0.091 0.137 0.228 0.443 0.807 0 '25 0.185 0.000 2 F 281 WNW 0.502 0.263 0.792 1.346 0.099 0.005 3.146 NW 0.001 0.000 0.137 0.411 0.574 1.747 1.963 0.459 0.015 5.308 NNW 0.002 0.000 0.183 0.411 0.438 1.593 1. 856 0.197 0.010 4.689 SUBTOTAL 0.046 0.320 4.566 8.174 7.233 14. 803 11.800 1.869 0.068 48.878 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOVRS OF ELEVATED RELEASCS 1962.040 TOTAL HOURS OF STABILITY CLASS D 1163. 120 TOTAL HOURS OF ELEVATED STABILITY CLASS D 1070.430 METEOROLOGICAL FACILITY: BROWNS PERRY NUCLEAR PLANT STABILITY BASCD ON DCLTA-T BETWEEN 45 30 AND 89.59 METERS

~

WIND DIRECTION MEASURED AT 45. 67 METER LEVEL WIND SPEED MEASVRED AT 45.67 METER LEVEl EFFLUCNT VELOCITY m 12.60 M/S DATE PRINTED: 24-JAN-94 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBCRS El-56

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

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 93 DEC 31, 93 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 0.091 0.091 0.228 0.354 0.770 0.037 0.000 0.000 :1.572 NNE 0.000 0.000 0.091 0.183 0.835 0.723 0.076 0.000 0.000 1.907 NE 0.000 0.046 0.183 0.411 0.354 0.328 0.038 0.000 0.000 1.360 ENE 0.000 0.000 0.000 0.137 0.135 0.080 0.000 0.000 0.000 0.352 E 0.000 0.000 0.274 0.320 0.403 0.360 0.000 0.000 0;000 1.357 ESE 0.000 0.046 0.411 1.050 0.923 1.730 0.075 0.000 0.000 4.236 SE 0.000 0.000 0.365 1.233 1.109 1.655 0.334 0.062 0.000 4.758 SSE 0.000 0.000 0.274 0.548 0. 661 1.684 1.191 0.447 0.000 4.805 S 0.000 0.000 0.320 0.274 0.309 0.827 0.446 0.235 0.007 2.418 SSW 0.000 0.046 0.274 0.411 0.264 0.279 0.188 0.000 0.000 1.461 SW 0.000 0.091 0.228 0.183 0.222 0.484 0.113 0.034 0.000 1.355 WSW 0.000 0.000 0.137 0.320 0.305 0.245 0.037 0.000 0.000 1.044 W 0.000 0.000 0.091 0.457 0.087 0.165 0.000 0.000 0.000 0.800 WNW 0.000 0.000 0.091 0.137 0.042 = 0.121 0.037 0.000 0.000 0.429 NW 0.000 0.000 0.046 0.000 0.091 0.228 0.258 0.193 0.074 0.089 0.000 0 '79 NNW 0.000 0.046 0.396 0.673 0.225 0.000 0.000 1.340 SUBTOTAL 0.000 0.365 2.922 6.164 6.658 10. 319 2.872 0.866 0.007 30.174 TOTAL HOURS OF VALZD OBSERVATIONS 2190.000 TOTAL HOURS OF ELEVATED RELEASES 1962.040 HOURS OF STABILITY CLASS E 'OTAL 726.060 TOTAL HOURS OF ELEVATED STABILZTY CLASS E 660.800 METEOROLOGICAL FACILITY: DROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45 ~ 30 AND 89 ~ 59 METERS WIND DIRECTION MEASURED AT 45. 67 METER LEVEL WIND SPEED MEASURED AT 45.67 METER IEVEL EFFLUENT VELOCITY 12.60 M/S DATE PRINTED: 24-JAN-94 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-57

SPLIT JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION POR STABILITY CLASS F { 1.5< DELTA T<~ 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 93 DEC 31, 93 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 >a24.5 TOTAL N 0.000 0.000 0.000 0.137 0.046 0.164 0.000 0.000 0.000 0.347 NNE 0.000 0.000 0.046 0.046 0.000 0. 078 0.299 0.000 0.000 0.468 NE 0.000 0.046 0.000 0.183 0.089 0.164 0.037 0.000 0.000 0.519 ENE 0.000 0.000 0.046 0.228 0.129 0.162 0.000 0.000 0.000 0.565 E 0.000 0.000 0.091 0.091 0.179 0. 411 0.000 0.000 0.000 0.772 ESE 0.000 0.000 0.183 0. 594 0.353 0.162 0.000 0.000 0.000 1. 291 SE 0.000 0.091 0.365 0. 594 0.309 0.125 0.000 0.000 0.000 1.484 SSE 0.000 0.000 0.137 0.091 0.224 0.360 0.000 0.000 0.000 0.812 S 0.000 0.046 0.091 0.137 0.000 0.000 0.000 0.000 0.000 0.274 SSW 0.000 0.000 0.091 0.000 0.044 0.000 0.000 0.000 0.000 0.136 SW 0.000 0.046 0.046 0.091 0.045 0.000 0.000 0.000 0.000 0.228 WSW 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 W 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.091 WNW 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.091 NW 0.000 0.000 0.000 0.000 0.086 0.000 0.000 0.000 0.000 0.086 NNW 0.000 0.000 0.000 0.137 0.133 0.040 0.000 0.000 0.000 0.310 SUBTOTAL 0.000 0.228 1.233 2.420 1.638 1.665 0.336 0.000 0. 000 7.520 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF ELEVATED RELEASES 1962.040 TOTAL HOURS OF STABILITY CLASS F 196.670 TOTAL HOURS OF ELEVATED STABILITY ClASS F 164.690 METEOROLOGICAL FACILZTY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DEITA-T BETWEEN 45.30 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.67 METER LEVEL WIND SPEED MEASURED AT 45.67 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRINTED: 24-JAN-94 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-58

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

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE OCT 1, 93 DEC 31, 93 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 TOTAI N 0.000 0.000 0.000 0.000 0.000 0.040 0.000 0.000 0.000 0.040 NNE 0.000 0.000 0.000 0.000 0.000 0". 040 0.038 0.000 0.000 0.078 NE 0.000 0.000 0.046 0.046 0.086 0.121 0.000 0.000 0.000 0.299 ENE 0.000 0.000 0.000 0.000 0.000 0.160 0.000 0.000 0.000 0.160 E 0.000 0.000 0.000 0.000 0.085 0.041 0.000 0.000 0.000 0.126 ESE 0.000 0.000 0.000 0.091 0.000 0.000 0.000 0.000 0.000 0.091 SE 0.000 0.000 0.183 0.457 0.441 0.123 0.000 0.000 0.000 1.204 SSE 0.000 0.046 0.091 0.091 0.046 0.000 0.000 0.000 0.000 0.274 S 0.000 0.000 0.137 0.046 0.000 0.000 0.000 0.000 0.000 0.183 SSW 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 SW 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 WSW 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.091 0.548 0.731 0.658 0.526 0.038 0.000 0.000 2.592 TOTAL HOURS OF VALID OBSERVATIONS 2190.000 TOTAL HOURS OF ELEVATED RELEASES 1962.040 TOTAL HOURS OF STABILITY CLASS G 71.360 TOTAL HOURS OF ELEVATED STABILITY CLASS G 56.770 METEOROLOGICAL FACIIZTY: DROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89.59 METERS WIND DIRECTZON MEASURED AT 45.67 METER LEVEL WIND SPEED MEASURED AT 45.67 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRINTED: 24-JAN-94 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS E1-59

Radiological impact Assessment Browns Ferry Nuclear Plant July - December 1993 Table 12 Joint Frequency Distribution in Percent for Stack Releases Third Quarter E1-60

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

BROWNS FERRY NUCLEAR PLANT JUL 1 ~ 93 SEP 30i 93 WIND WIND SPEED1MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-'l.4 7.5-12.4 12.5-18.4 18.5-24.4 >%$ 24. 5 TOTAL N 0.000 0.000 0.000 D.DQQ D.DQQ 0.000 0.000 D.QDD 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 o.ooa 0.000 0.000 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 a.aoo 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 D.QDQ E 0.000 0.000 0.000 0.000 0.006 0.000 0.000 0.000 0.060 0.000 ESE 0.000 0.000 0.000 D.DDD 0.000 0.000 0.000 0.000 0.000 0.000 SE Q.QDQ Q.aoa 0.000 0.000 0.000 D.aaa 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 a.aao 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 Q.QDQ o.aao 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.006 0.000 o.ooa 0.000 o.aoo 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 a.ooo 0.000 WSW 0.000 0 ~ 000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.006 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 o.aoa 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 Q.aaa o.aao 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAZ 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2128 TOTAL HOURS OF STABILITY CLASS A 0 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABIZZTY CLASS A 0 TOTAL HOURS OF VALID WZND DIRECTION-WIND SPEED-STABZIITY OBSERVATIONS 2113 TOTAL HOURS CALM 0 METEOROLOGICAL FACILZTY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89.59 METERS WZND SPEED AND DIRECTZOH MEASURED AT 92.63 METER LEVEL DATE PRINTED: 21-OCT-93 MEAN WIND SPEED $$ 0 00 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED PROM UNROUNDED NUMBERS El'-61

JOZNT PERCENTAGE PREQUENCZES OF WIND SPEED BY WIND DIRECTION POR STABILITY CLASS B (-1.9< DELTA T<~-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT JUL 1, 93 SEP 30, 93 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 N 0.000 0.000 0.000 0.000 o.aoo 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.OOQ 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE O.OOQ 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 Q.OOQ 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0 ~ 000 0.000 O.OQO 0.000 0.000 0.000 0.000 O.OOD 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.OQO o.aao 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.047 WSW 0.000 0.000 0.000 0.000 O.ooa 0.000 0.000 0.000 0.000 O.DOO W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 a.ooa WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW Q.ooo a.ooa 0.000 0.000 0.000 D.DOO 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.047 TOTAL HOVRS OF VALID STABILITY OBSERVATIONS 2128 TOTAL HOURS OF STABILITY CLASS B 1 TOTAL HOURS OF VALID WIND DIRECTION WIND SPEED STABILITY CLASS B 1 TOTAL HOVRS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2113 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS PERRY NVCLEAR PLANT STABILITY BASED ON DEITA-T BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 92.63 METER LEVEL DATE PRINTED: 21-OCT-93 MEAN WIND SPEED ~ 11.80 NOTE: TOTALS AND SVBTOTALS ARE OBTAINED FROM VNROUNDED NUMBERS El-62

JOZNT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C [-1.7< DELTA T<55-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT JUL 14 93 SEP 3Q5 93

'WIND WZND SPEED(MPH)

DIRECTION CALM 5. 6-1. 4 1.5-3.4 3.5-5.4 5.5-3.4 7.5-12.4 12.5-18 ' 18.5-24 ' >>24.5 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 a.aoo 0.000 0.000 0.000 0.000 0.000 0.000 0 F 000 0.000 tiE 0.000 Q.QQQ o.aoo 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 Q.QQQ 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 Q.ooo 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 Q.QQQ 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 Q.QQQ 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.QQO o.aao 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Q.QQQ a.ooo SSW 0.000 0.000 0.000 0.000 0;000 0.047 0.000 0.000 0.000 0.047 SW 0.000 0.000 0.000 0.000 0.095 0.142 0.095 0.000 0.000 0 ~ 331 WSW a.ooo 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 W Q.QQQ a.ooo 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 Wtiw 0.000 Q.QQQ a.ooo 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 Q.QQQ a.aao 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 Q.aoo 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.189 0.189 0.095 0.000 0.000 0.473 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2128 TOTAL HOURS OF STABILITY CLASS C 10 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 10 TOTAL HOURS OF VALID WIND DIRECTZON-WIND SPEED-STABILITY OBSERVATIONS 2113 TOTAL HOURS CALM 0 METEOROIOGICAL FACILITY'ROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 92 ~ 63 METER LEVEL DATE PRINTED: 21-OCT 93 MEAN WIND SPEED 55 9.60 NOTE TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-63

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION POR STABILITY CLASS D ( 1 5( DELTA T<m 0 5 C/100 M)

BROWHS FERRY NUCLEAR PLANT JUL 1, 93 SEP 30, 93 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 0.008 '0. 000 0.237 0.331 0.899 1.514 0 '84 0.000 0.047 3.321 NNE 0.015 0.047 0.379 0.331 0.426 0.805 0.142 0.047 0.047 2.239 NE 0.003 0.000 0.095 0.379 0.189 0.284 0.000 0.000 0.047 0.997 ENE 0 '05 0. 04'7 0.095 0.189 0.189 0.331 0.000 0.000 0.000 0.857 E 0.012 0.047 0.284 0.095 0.095 0.047 0.000 0.000 0.000 0.579 ESE 0.010 0.047 0.237 0.047 0.142 0.095 0.000 0.000 0.000 0.578 SE 0.026 0.000 0.757 1.372 0.615 0.426 0.284 0.000 0.000 3.481 SSE 0.048 0.047 1. 325 1.467 0.757 1.325 1.088 0.426 0.000 6.484 S 0. 031 0.000 0. &99 0.994 0.663 1.514 1.514 0. 521 0.047 6.184 SSW 0.026 0.095 0.663 0.947 0.947 1.704 0.521 0.047 0.000 4.94S SW 0.035 0.237 0.757 1.183 0.994 ~ 1.041 0.852 0.237 0.000 5.335 WSW 0.015 0.000 0.426 1.656 0.994 l. 372 0.237 0.000 0.000 4.700 W 0.012 0.000 0.331 1.467 1.893 1.704 0.379 0.047 0.000 5.833 WNW 0.023 0.047 0.615 0.757 1.278 2.082 0.521 0.000 0.000 '5.324 NW 0.005 0.000 0.142 0.615 0.663 1.751 0.710 0.189 0.047 4.122 NNW 0.010 0.000 0.284 0.379 0.379 1.041 0.568 0.000 0.000 2.660 SUB'TOTAL 0.284 0.615 7.525 12.210 11.122 17. 037 7.099 1 ~ 514 0.237 57.643 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2128 TOTAL HOURS OF STABILZTY CLASS D 1225 TOTAL HOURS OP VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 1218 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY OBSERVATIONS 2113 TOTAL HOURS CALM 6 METEOROLOGICAL PACZLZTY.: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 92.63 METER LEVEL DATE PRINTED: 21-OCT-93 MEAN WIND SPEED ~ 7.83 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED PROM UNROUNDED NUMBERS El-64

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E t-0. 5< DELTA T<~ 1. 5 C/100 M)

BROWNS FERRY NUCLEAR PLANT JUL 1, 93 SEP 30, 93 MIND WIND SPEED(MPH)

DIRECTION CALH 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 O.OOQ 0. 142 0.426 0.189 0. 852 0.426 0.095 0.000 2.149 NNE 0.020 0.000 0.142 0.095 0.095 0.710 0.426 0.000 0.000 1.487 NE 0.013 0.000 0. 095 0.189 0.237 0.615 0.189 0.000 0.000 1.338 ENE 0.020 0.047 0.095 0.095 0.142 0.710 0.047 a.aoo 0.000 1.156 E 0.013 0.000 0.095 0.095 0.142 0.142 0.000 0.000 0.000 0.486 ESE 0.026 0.047 0.142 0.331 0.331 0.095 0.000 0.000 0.000 0.973 SE 0.066 0.095 0.379 0.710 0.331 0.757 0.000 0.000 0.000 2.337 SSE 0.099 0.189 0.521 0.710 0.426 1.088 0.189 0.189 0.000 3.411 S 0.085 0.095 0.521 0.805 0.379 0.142 a.426 0.142 0.000 '2. 594 SSW 0.066 0.047 0.426 0.663 0.426 0.757 0.237 0.189 0.000 2.811 SM 0.072 0. 04'7 0.473 0.142 0.663 1.278 0.426 0.047 0.000 3.148 WSW 0.053 0.095 0.284 0.615 0.521 0.757 0.000 0.047 0.000 2.372 W 0.046 0.047 0.284 0.331 0.473 0.331 0.047 0.000 0.000 1.560 WNW 0.059 0.047 0.379 Q.331 0.568 0.521 0.095 0.000 0.000 2.000 NW 0.039 0.047 0.237 0.379 0.142 0.710 0.142 0.047 0.000 1.743 NHW 0.013 0.000 0.095 0.379 0.142 0.521 0.284 0.047 0.000 1.480 SUBTOTAL 0.710 0.805 4.307 6.294 5.206 9.986 2.934 0.805 0.000 31.046 TOTAL HOURS OF VALID STABZLZTY OBSERVATIONS 2128 TOTAL HOURS OFSTABILITY CLASS E 664 TOTAL HOURS OP VALID WZND DIRECTION-WIND SPEED-STABILZTY CLASS E 656 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2113 TOTAL HOURS CALM 15 METEOROLOGZCAL FACILZTY BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA T BETWEEN 45.30 AND 89 59 METERS WIND SPEED AND DIRECTION MEASURED AT 92.63 METER LEVEL DATE PRINTED: 21-OCT-93 MEAN WZND SPEED ~ 7.36 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED PROM UNROUNDED NUMBERS E1-65

JOINT PERCENTAOE FREQUENCIES OF 0 WItlD SPEED BY WIND DIRECTION FOR STABILITY CI ASS F ( 1.5< DELTA T< 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT JUL 1, 93 SEP 30, 93 WIND WIND SPEED(MPHt DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 24.5 TOTAL N 0.000 0.000 0.000 0.047 0.000 0.095 0.237 0.142 G.ooa 0.521 NtlE 0.000 0.000 0.000 0.000 0.095 0.237 0.521 0.095 0.000 0.947 NE 0.000 0.000 0.000 a.ooo 0.047 0.663 0.473 0.095 0.000 1. 278 ENE 0.000 0.000 0.000 0.047 0.095 0.237 0.189 0.000 0 000 0.568 E 0.000 0.000 0.000 0.047 0.095 0.379 0.047 0.000 0.000 0.568 ESE 0.038 0.047 0.142 0.047 0.142 0.284 o.aao 0.000 0.000 0.700 SE 0.009 0.000 0.047 0.000 0.095 0.379 0.000 0.000 0.000 0.530 SSE 0.000 0.000 0.000 O.O47 0.000 0.426 0.000 0.000 0.000 0.473 S 0.000 0.000 0.000 0.000 0.095 0.142 0.047 0.000 0.000 0.284 SSW 0.000 0.000 0.000 0.000 0.142 0.095 0,047 0.000 0.000 0.284 SW 0.009 0.047 0.000 0.047 0.095 0.331 0.237 0.000 0.000 0.767 WSW 0.009 0.000 0 '47 0.047 0.095 0.095 0.000 0.000 0.000 0.293 W 0.000 0 ~ 000 0.000 0.047 0.000 0.095 0 000 0.000 0.000 0.142 WNW 0 ~ 019 0.000 0.095 0.000 0.000 0.000 0.000 o.aoo 0.000 0.114 NW 0.000 0.000 0-000 0.000 0.047 0.047 0.000 0.000 0.000 0.095 tlNW a.oo9 0.000 0. 04'7 0.000 0.047 0.047 0.047 0 000 0.000 0.199 SUBTOTAL 0.095 0.095 0.379 0.379 1.088 3.549 1.846 0.331 0.000 7.761 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2128 TOTAL HOURS OF STABZLITY CI ASS F 164 TOTAL HOURS OF VALID WIND DIRECTZOtl WIND SPEED STABILITY CLASS P 164 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2113 TOTAL HOURS CALM 2 METEOROLOGICAL PACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DEITA T BETWEEN -45 WIND SPEED AND DZRECTZON tlEASURED AT 92

'0'3AND 89 59 METERS METER LEVEI DATE PRINTED: 21-OCT-93 MEAN WIND SPEED ~ 10.28 NOTE TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-66

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

BROWNS FERRY NUCLEAR PLANT JUL 1, 93 - SEP 30 '3 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >~24.5 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.095 0.047 0.000 0.000 0.142 NNE 0.000 0.000 0.000 0.000 0.000 0.142 0.379 0.284 0.000 0.805 NE 0.000 0.000 Q.QQQ Q.aaa 0.047 0.331 0.331 0.331 0.000 1.041 ENE 0.000 0.000 0.000 0.000 0.000 0. 189 0.189 a.ooo 0.000 0.379 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.047 0.000 0.047 0.000 0.000 0.000 0.095 SE 0.000 o.aoo O.O47 0.000 0.000 0.095 0.047 0.000 0.000 0.189 SSE 0.000 0.000 0.000 0.000 0.000 Q.095 0.000 0.000 0.000 0.095 "S 0.000 0.000 0.000 0.000 0.000 0.095 0.000 0.000 o.ooa 0.095 SSW 0.000 0.000 0.000 0.000 0.000 0.142 0.000 0.000 0.000 0.142 SW 0.000'.000 0.000 0.000 0.000 0.000'.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 Q.QQQ 0.000 0.047 0.000 0.000 0.000 0 F 047 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 o.aao 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Q.QQQ NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW Q.QQQ Q.OQQ 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.047 . 0.047 0.047 1.278 0.994 0.615 0.000 3.029 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2128 TOTAL HOURS OF STABILITY CLASS G 64 TOTAL HOURS OF VALID WZND DIRECTION-WIND SPEED-STABILITY CLASS G 64 TOTAL HOURS OF VALID WIND DIRECTZON-WIND SPEED-STABILITY OBSERVATIONS 2113 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45 '0 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT 92 ~ 63 METER LEVEL DATE PRINTED: 21-OCT-93 MEAN WIND SPEED ~ 13.35 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-67

Radiological Impact Assessment Browns Ferry Nuclear Plant July - December 1993 Table 13 Joint Frequency Distribution in Percent for Stack Releases Fourth Quarter El-68

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

BROWNS FERRY NUCLEAR PLANT OCT 1, 93 DEC 31, 93 WIND WIND SPEED(MPH)

DZRECTZON CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >~24.5 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 o.ono 0.000 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.000 0.000 0 F 000 0.000 0 F 000 0.000 0.000 TOTAL HOURS OF VALZD STABILITY OBSERVATIONS 2201 TOTAL HOURS OF STABILITY CLASS A 0 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 0 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2192 TOTAL HOURS CALM 0 METEOROLOGICAL FACZLZTY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45 '0 AND 89.59 HETERS WIND SPEED AND DIRECTION MEASURED AT 92.63 METER LEVEZ DATE PRINTED: 24-JAN-94 MEAN WIND SPEED ~ 0.00 NOTE: TOTAZ,S AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-69

JOINT PERCENTAGE FREQUENCIES OP WIND SPEED BY WIND DIRECTION POR STABILITY CLASS B (-1.9< DELTA T<~-1.7 C/100 M)

BROWNS PERRY NUCLEAR PLANT OCT lr 93 DEC 31r 93 WIND WIND SPEED t 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 >m24.5 TOTAL N 0.000 0.000 0.000 0.000 0. 000 0.000 0.000 0.000 0.000 0 F 000 NNE 0.000 0.000 0.000 0.000 0. 000 0.000 0.000 0.000 0 F 000 0.000 NE 0.000 0.000 0.000 0.000 0. 000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 S 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSW r 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.046 0.000 0.046 0.046 0.000 0.000 0.137 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W, 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0 F 000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 . 0.046 0.000 0.046 0.046 0.000 0.000 0.137 TOTAL HOURS OP VALID STABILITY OBSERVATIONS 2201 TOTAL HOURS OP STABILITY CLASS B 3 TOTAL HOURS OP VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 3 TOTAL HOURS OP VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2192 TOTAL HOURS CALM 0 METEOROLOGICAL PACILITY: BROWNS PERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89 59 METERS WIND SPEED AND DZRECTION MEASURED AT 92.63 METER LEVEL DATE PRINTED: 24-JAN-94 MEAN WIND SPEED ~ 8.93 NOTE TOTALS AND SUBTOTALS ARE OBTAINED PROM UNROUNDED NUHBERS E1-70

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

BROWNS FERRY NUCLEAR PLANT OCT 1, 93 DEC 31, 93 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >~24.5 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NE, 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000. 0.000 0.000 S 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 SSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.046 0.000 0.046 0.091 0.000 0.000 0.182 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.046 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW .0. 000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.000 0.091 0.000 0.137 0.091 0.000 0.000 0.319 TOTAL HOURS OF VAZ ZD STABILITY OBSERVATIONS 2201 TOTAL HOURS OF STABILITY CLASS C 7 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 7 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILZTY OBSERVATIONS 2192 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89.59 METERS WIND SPEED,AND DZRECTION MEASURED AT 92 '3 METER LEVEL DATE PRINTED: 24-JAN-94 MEAN WIND SPEED ~ 9.76 NOTE TOTALS AND 'SUBTOTAZS ARE OBTAINED FROM UNROUNDED NUMBERS El-71

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABZLITY CLASS D {-1.5< DELTA T<~-0 ~ 5 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 93 - DEC 31, 93 WZND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7 ' 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000 0.046 0.046 0". 228 0.502 1.277 2.144 0.730 0.046 5.018 NNE 0.000 0.046 0.182 0.091 0.684 1.049 0.867 0.046 0.137 3.102 NE 0,. 000 0.046 0.228 0.456 0.639 0.456 0.091 0.000 0.000 1. 916 ENE 0.000 0.000 0.182 0.182 0.274 0.228 0.000 0.000 0.000 0.867 E 0.000 0.000 0.365 0.274 0.091 0.228 0.000 0.000 0.000 0.958 ESE 0.000 0.046 0.365 0.365 0.365 0.639 0 '30 0.046 0.046 2.600 SE 0.000 0.000 0.228 0.821 0.730 0.821 1.141 1.688 0.411 5.839 SSE 0.000 =

0.000 0.365 0.319 0.365 0.867 1.642 0.365 0.000 3.923 S 0.000 0.137 0.228 0.182 0.730 1.095 0.912 0. 912 0.182 4.380 SSW 0.000 0.046 0.228 0.228 0.684 0.958 0.867 0.319 0.046 3.376 SW 0.000 0.000 0.319 0.502 0.046 0.639 1.232 0.091 0 F 000 2.828 WSW 0.000 0.046 0.274 0.319 0.137 0.639 0.730 0.137 F 000 2.281 W 0.000 0.091 0.091 0. 411 0.411 0.867 0.547 0.274 0.182 2.874 WNW 0.000 0.000 0.137 0.639 0.365 0.639 2.007 F 274 0.274 4.334 NW 0.000 0.000 0.228 0.182 0.365 1.414 2.281 1.323 0.411 6.204 NNW 0.000 0.000 0.091 0.274 0.365 1.232 1.962 1.141 0.046 5.109 SUBTOTAL 0.000 0.502 3.558 5.474 6.752 13.047 17. 153 7.345 1.779 55.611 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2201 TOTAL HOURS OF STABIIZTY CLASS D 1223 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 1219 TOTAI HOURS OF VALID WIND DIRECTION WIND SPEED-STABILITY OBSERVATIONS 2192 TOTAL HOURS CAIM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45. 30 AND 89. 59 HETERS WIND SPEED AND DIRECTION MEASURED AT 92. 63 METER LEVEL DATE PRZNTED: 24-JAN-94 MEAN WIND SPEED ~ 12.16 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-72

JOZNT, PERCENTAGE FREQUENCIES OF WIND SPEED BY WZND DIRECTION FOR STABILITY CLASS E (-0.5< DELTA T<~ 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 93 - DEC 31, 93 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 lb.5-24.4 24.5 TOTAL N 0.006 0.000 0.046 0.046 0.091 0.639 0.730 0.046 0.000 1.602 NNE 0.000 0.000 0.000 0.046 0.137 0.912 0.502 0.046 0.000 1.642 NE 0.017 0.000 0. 137 0.000 0.046 1.049 0.319 0.091 0.000 1.659 ENE 0.006 0.000 0.046 0.228 0.091 0.274 0.137 0.000 0.000 0.781 E 0.017 0.000 0.137 0.137 0.137 0.091 0.000 0.000 0.000 0. 519 ESE 0.011 0.000 0.091 0.182 0.365 0.684 0.867 0.228 0.000 2.429 SE 0.011 0.029 0.000 0.000 0.091 0.274 4

1.095 l. 414 1.779 0.547 0.228 5.440 SSE 0.228 0.365 0.639 2.144 1.505 0.684 0.137 5.731 S 0.017 0.046 0.091 0.091 0.137 1.642 1.597 0.821 0.365 4.807 SSW 0.017 0.000 0.137 0.091 0.046 0.456 0.639 0.228 0.000 1.614 SW 0.017

0.000 0.137 0.000 0.137 0.684 0.547 0.091 0.000 1.614 WSW 0.011 0.000 0.091 0.091 0.274 0.319 0.319 0.091 0.000 1.198 W 0.023 0.000 0.182 0.091 0.137 0.411 0.137 0.000 0.000 0.981 WNW 0.017 0.000 0.137 0.182 0.228 0.091 0.228 0.046 0.000 0.930 NW 0.017 0.046 0.091 0.137 0.000 0.228 0.228 0.091 0.091 0.930 NNW 0. 011 0.000 0.091 0.091 0.091 0.502 0.547 0.182 0.000 1.517 SUBTOTAZ 0.228 0.091 1.734 2.053 3.650 11. 542 10.082 3.193 0.821 33.394 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2201 TOTAL HOURS OF STABILITY CLASS E 737 TOTAL HOURS OF VALID WIND DIRECTION WIND SPEED-STABILITY CIASS E 732 TOTAL HOURS OF VALID WZHD DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2192 TOTAL HOURS CALM 5 METEOROLOGICAL FACILITY: BROWNS FERRY NUCZEAR PZANT STABILITY BASED ON DELTA-T BETWEEN 45 30 AND 89 59 METERS WIND SPEED AND DIRECTION MEASURED AT 92.63 METER LEVEL DATE PRINTED: 24-JAN-94 MEAN WIND SPEED ~ 11.89 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-73

JOINT PERCENTAGE FREQUENCIES OF WZND SPEED BY WIND DIRECTION FOR STABILITY CLASS F { 1.5< DELTA T<~ 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 93 DEC 31, 93

. WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.000 0.000 0.000 0.137 0.091 0.091 0.091 0.000 0.000 0.411 NNE 0.000 0.000 0.000 0.046 0.000 0.000 0.182 0.091 0.000 0.319 NE 0.017 0.000 0.137 0.000 0.000 0.091 0.000 0.274 0.000 0.519 ENE 0.006 0.000 0.046 0.000 0.091 0.091 0.182 0.000 0.000 0.416 E 0.000 0.000 0.000 0.182 0.137 0.274 0.000 0.000 0.000 0.593 ESE 0.000 0.000 0.000 0.046 0.091 0.365 0.137 0.000 0.000 0.639 SE 0.006 0.000 0.046 0.137 0.365 0.867 0.319 0.091 0.000 1.831 SSE 0.000 0.000 0.000 0.091 0.182 0.365 0.547 0.000 0.000 1.186 S 0. 011 0.046 0.046 0.091 0.046 0.365 0.091 0.000 0.000 0.696 SSW 0.006 0.000 0.000 0.000 0.046 0.000 0.000 0.091 0.000 0.000 F 000 0 '43 SW = 0;000 0.046 0.046 0.046 0.046 0.000 0.000 0.182 WSW 0.006 0.000 0.046 0.046 0.046 0.046 0.000 0.000 0.000 0.188 W 0. 011 0.046 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.148 WNW 0.011 0.046 0.046 0.000 0.046 0.046 0.000 0.000 0.000 0.194 NW 0. 011 0.046 0.046 0.000 0.000 0.000 0.046 0.000 0.000 0.148 NNW 0.006 0.000 0.046 0.046 0.000 0. 091 0.046 0.000 0.000 0.234 SUBTOTAL 0.091 0.182 0.547 0.912 1.141 2."828 1.688 0.456 0.000 7.847 TOTAZ HOURS OF VALID STABZLZTY OBSERVATIONS 2201 TOTAL HOURS OF STABZLITY CLASS F 172 TOTAL HOURS OF VALID WIND DIRECTZON-WIND SPEED-STABILITY CLASS F 172 TOTAL HOURS OF VALID WZND DIRECTION-WIND SPEED-STABILITY OBSERVATZONS 2192 TOTAL HOURS CALM 2 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DEZTA-T BETWEEN 45.30 AND 89-59 METERS WIND SPEED AND DIRECTION MEASURED AT 92 ~ 63 METER LEVEL DATE PRINTED: 24-JAN-94

'MEAN WIND SPEED ~ 9.52 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS El-74

JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DZRECTION FOR STABZLITY CLASS G t DELTA T > 4. 0 C/100 M)

BROWNS FERRY NUCLEAR PLANT OCT 1, 93 DEC 31, 93 WIND WIND SPEED{MPH)

DIRECTION CALM 0.6-1.4 1. 5-3. 4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >~24.5 TOTAL N 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 NNE 0.000 -0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.046 NE 0.000 0.000 0.046 0.000 0.000 0.000 0.091 0.000 0.000 0.137 ENE 0.000 0.000 0.000 0.000 0.000 0.000 0.274 0.000 0.000 0.274 E 0.000 0.000 0.000 0.000 0.046 0.046 0.091 0.000 0.000 0.182 ESE 0.000 0.000 0.000 0.000 0.000 0. 137 0.000 0.000 0.000 0.137 SE 0.000 0.000 0.046 0.000 0.046 0.091 0.182 0.000 0.000 0.365 SSE 0.000 0.000 0.000 0.000 0.000 0.182 0.274 0.000 0.000 0.456 S 0.000 0.000 0.046 0.091 0.091 0. 411 0.000 0.000 0.000 0.639 SSW 0.000 0.000 0.000 0.091 0.000 0.046 0.000 0.000 0.000 0.137 SW 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.000 0.046 0.091 0.000 0.000 0.000 0.000 0.000 0.137 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.091 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 F 000 SUBTOTAL 0.000 0.000 0.228 0.319 0.274 0.912 0.958 0.000 0.000 2.692 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2201 TOTAL HOURS OF STABILITY CLASS G 59 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 59 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2192 TOTAL HOURS CALM 0 HETEOROLOGZCAL FACZLITY: BROWNS FERRY, NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89 '9 METERS WIND SPEED AND DIRECTION HEASURED AT 92.63 METER LEVEL DATE PRINTED: 24-JAN-94 MEAN WIND SPEED = 10.26 NOTE: TOTALS AND SUBTOTALS ARE OBTAZNED FROM UNROUNDED NUMBERS El-75

ML18037A813

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