ML18037A435

Semiannual Radioactive Effluent Release Rept Browns Ferry Nuclear Plant Jan-June 1993. W/930830 Ltr

ML18037A435
Person / Time
Site:	Browns Ferry
Issue date:	06/30/1993
From:	Salas P TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9309070126
Download: ML18037A435 (194)

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ACCELERATED DOCUMENT DISTRIBUTION'SYSTEM REGULRT+ INFORMRTION DISTRIBUTIO1+YSTEM (RIDE)

ACCESSION NBR:9309070126 DOC.DATE: 93/06/30 NOTARIZED: NO DOCKET FACIL:50-259 Browns Ferry Nuclear Power Station, Unit 1, Tennessee 05000259 50-260 Browns Ferry Nuclear Power Station, Unit 2, Tennessee 05000260 50-296 Browns Ferry Nuclear Power Station, Unit 3, Tennessee 05000296 AUTH.NAMg. AUTHOR AFFILIATION SALAS,P. 'ennessee Valley Authority En'"4' +

RECIP.NAME RECIPIENT AFFILIATION

SUBJECT:

"Semiannual Radioactive Effluent Release Rept Browns Ferry Nuclear Plant Jan-June 1993." W/930830 ltr.

DISTRIBUTION CODE: IE48D TITLE: 50.36a(a)(2)

COPIES RECEIVED:LTR Semiannual L ENCL Effluent Release Reports J SIZE: I (O NOTES:

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD2-4 3 3 PD2-4-PD 1 1 ROSS,T. 1 1 WILLIAMSFJ. 1 1 INTERNAL: ACRS 1 1 NRR/DRSS/PRPB11 2 2 G FILE 01 1 1 RGN2 DRSS/RPB 2 2 E 02 1 1 EXTERNAL: BNL TICHLERFJ03 1 1 EG&G SIMPSON,F 2 2 NRC PDR 1, 1 NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-~7 {EXT. 504.2065) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON"I'EED!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 17 ENCL 17

0 1 Tennessee Valley Authority, Post Olfice Box 2000. Decatur, Alabama 35609 AU6 30 1993 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen:

In the Matter of Docket Nos. 50-259 Tennessee Valley Authority 50-260 50-296 BROWNS FERRY NUCLEAR PLANT (BFN) SEMIANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT JANUARY THROUGH JUNE 1993 In accordance with the BFN Radiological Effluent Manual, Section F.2, and Regulatory Guide 1.21, Revision 1, two copies of the Semiannual Radioactive Effluent Release Report are provided. The report consists of the following:

1. The Radiological Impact Report (Enclosure 1)

2. Effluent and Waste Disposal Semiannual Report (Enclosure 2)

3. The Inoperable Radiological Effluent Instrumentation Report (Enclosure 3)

BFN Technical Specifications 3.2.D.2, 3.2.K.2, and 6.12.2 require the Inoperable Radioactive Effluent Instrumentation Report and changes to the Offsite Dose Calculation Manual to be included with the Semiannual Radioactive Effluent Release Report. During this reporting period there were no changes to the Offsite Dose Calculation Manual.

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U.S. Nuclear Regulatory Commission Page 2 AUG 30 8>>

Please refer any questions or comments to me at (205) 729-2636.

Sincere as Manager of Site Licensing PAB 1G-BFN Enclosure cc (Enclosure):

Mr. Paul Krippner American Nuclear Insurers Town Center, Suite 300S 29 South Main Street West Hartford, Connecticut 06107-2445 NRC Resident Inspector Browns Ferry Nuclear Plant Route 12, Box 637 Athens, Alabama 35611 Mr. Thierry M. Ross, Project Manager U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 Mr. R. V. Crlenjak, Project Chief U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323

ENCLOSURE 1 TENNESSEE VALLEY AUTHORITY SEMIANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT BROWNS FERRY NUCLEAR PLANT (BFN)

"THE RADIOLOGICAL IMPACT ASSESSMENT REPORT"

0 Page 1 of 66 Radiological Impact Assessment Browns Ferry Nuclear Plant January - June 1993 INTRODUCTION 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 effluents in the environment is estimated using meteorological data and riverflow data measured during the period. In this report, the doses resulting from releases are described and compared to limits established for Browns Ferry.

DOSE LIMITS The ODCM specifie limits for the release of radioactive effluents, as well as limits for doses to the general public from the release of radioactive effluents. These limits are set well below the NRC 10 CFR 20 limits which govern the concentrations of radioactivity and exposures permissible in unrestricted areas. This ensures that radioactive effluent 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 effiuents 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.

~ c Page 2 of 66 Radiological Impact Assessment Browns Ferry Nuclear Plant 0 DOSE CALCULATIONS January - June 1993 Estimated doses to the public are determined using computer models (the Gaseous Effluent Licensing Code, GELC, and the Quarterly Water Dose Assessment Code, QWATA). These models are based on guidance provided by the NRC (in Regulatory Guides 1.109, 1.111 and 1.113) for determining the potential dose to individuals and populations living in the vicinity of the plant. The area around the plant is analyzed to determine the pathways through which the public may receive a dose. The doses calculated are a representation of the dose to a "maximum exposed individual." Some of the factors used in these calculations (such as ingestion rates) are maximum values. Many of these factors are obtained from NUREG/CR-1004. The values chosen will tend to overestimate the dose to this "maximum" person. The expected dose to actual individuals is lower. The calculated doses are presented in Tables 1A, 1B,2A,2B and 3.

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

Airborne Re/ease Points 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 4A and 48.

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 effluent 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 meters. Both of these JFDs are given in Tables 5A, 5B, 5E, and 5F.

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 6A and 6B.

Meteorolo ical Data 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 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

Page 3 of 66 Radiological Impact Assessment Browns Ferry Nuclear Plant January - June 1993 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. Cairns 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 (10-46 meters) stability class tends to be more stable than would be expected. However, during this infrequent condition, dose estimates will be conservative.

Ex/erne/ Ex osure Dose 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.

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

~Or an Dose Doses to organs due to releases of airborne effluents are estimated for the inhalation, ground contamination, and ingestion pathways. The ingestion pathway is further divided into four possible contributing pathways'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 identiTied. 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 effluents are presented in Tables 1A and 1B.

DOSES FROM LI UID EFFLUENTS For liquid effluents, the public can be exposed to radiation from three sources: the ingestion of water from the Tennessee River, the ingestion of fish caught in the Tennessee River, and direct exposure from radioactive material deposited on the river shoreline sediment (recreation).

The concentrations of radioactivity in the Tennessee River are estimated by a computer model which uses measured hydraulic data downstream of Browns Ferry. Parameters used to determine the doses are based on guidance given by the NRC (in Regulatory Guides 1.109) for

e Page 4 of 66 Radiological Impact Assessment Browns Ferry Nuclear Plant January - June 1993 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.

Li uid Release Points and River Dafa Radioactivity concentrations in the Tennessee River are calculated assuming that releases in liquid effluents 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 effluents for each quarter in the period are presented in Tables 2A and 28, along with the average river flows past the plant site for the periods.

POPULATION DOSES Population doses for highest exposed organ due to airborne effluents 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 effluents are calculated for the entire downstream Tennessee River Population. Water ingestion population doses are calculated using actual population figures for downstream public water supplies.

Fish ingestion population doses are calculated assuming that all sport fish caught in the Tennessee River are consumed by the Tennessee River population. Recreation population doses are calculated using actual recreational data on the number of shoreline visits at downstream locations.

Population dose estimates for airborne and liquid effluents are presented in Tables 1A, 18, 2A and 28.

DIRECT RADIATION 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 16.2 mR/quarter at onsite stations and

Page 5 of'6 Radiological Impact Assessment Browns Ferry Nuclear Plant January -June 1993 approximately 14.1 mR/quarter at offsite stations, or approximately 2.1 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 effluents.

DOSE TO MEMBERS OF THE PUBLIC INSIDE THE SITE BOUNDARY No routine activities within the site boundary by members of the public have been identified which would lead to their radiation exposure.

TOTAL DOSE To determine compliance with 40 CFR 190, annual total dose contributions to the maximum individual from BFN radioactive effluents 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 effluents for each quarter from ground contamination, inhalation and ingestion, the total body dose from liquid effluents for each quarter, the maximum organ dose (for any organ other than the thyroid) from liquid effluents for each quarter, and any identifiable increase in direct radiation dose levels as measured by the environmental monitoring program. This dose is compared to the 40 CFR 190 limit for total body or any organ dose (other than thyroid) to determine compliance.

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

Cumulative annual total doses are presented in Table 3.

Page 6 of 66 Radiological Impact Assessment Browns Ferry Nuclear Plant January - June 1993 Table 1A Doses from Airborne Effluents First Quarter Individual Doses Pathwa Dose Quarterl Limit Percent of Limit Location External Gamma Air 2.22E-03 mrad 5 mrad <1% SE/5600 meters Beta Air 1.06E-03 mrad 10 mrad <1% SE/5600 meters Submersion Total Bod 6.13E-03 mrad 10 mrad 1% SSW/4191 meters Skin 9.34E-03 mrad 10 mrad <1% SSW/4191 meters Or an Doses Child/Liver 1.55E-02 mrad 7.5 mrad <1% NNW/1 791 meters Child/Th roid 1.35E-02 mrad 7.5 mrad <1% NNW/1791 meters Child/Total 9.10E-03 mrad 7.5 mrad 1% NNW/1 791 meters Bod Po ulation Doses 1.56E-01 man-rem Maximum Organ Dose (organ) 1.64E-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).

V Page 7 of 66 Radiological Impact Assessment Browns Ferry Nuclear Plant January - June 1993 Table 1B Doses from Airborne Effluents Second Quarter Individual Doses Pathwa Dose Quarterl Limit Percent of Limit Location External Gamma Air 1.24E-04 mrad 5 mrad <1% SE/5600 meters Beta Air 9.68E-05 mrad 10 mrad 1% SE/5600 meters Submersion Total Bod 3.81E-04 mrad 10 mrad 1% NE/3772 meters Skin 7.16E-04 mrad 10 mrad <1% NE/3772 meters Or an Doses Child/Liver 1.08E-02 mrad 7.5 mrad 1% NNW/1791 meters Child/Th roid 4.57E-03 mrad 7.5 mrad 1% NNW/1 791 meters Child/Total 4.47E-03 mrad 7.5 mrad <1% NNW/1 791 meters Bod Po ulation Doses Total Body Dose 1.29E-02 man-rem Maximum Organ Dose (organ) 1.64E-02 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 mremlyr for natural background).

Page 8 of 66 Radiological Impact Assessment Browns Ferry Nuclear Plant January - June 1993 Table 2A Doses from Liquid ENuents First Quarter Individual Doses rem Age Group Organ Dose Pathway Dose Quarterly Percent of Limit Limit Adult Total Bod Water In estion 1.8E-04 Fish In estion 1.7E-02 Recreation 3.7E-02 Total 5.4EA2 1.5 mrem 3.6 %

Teen Liver Water In estion 1.9E-04 Fish In estion 2.9E-02 Recreation 3.7E-02 Total 6.7E<2 5 mrem 1.3 %

Child Th roid Water In estion 8.0E-04 Fish In estion 2.3E-03 Recreation 3.7E-02 Total 4.0E<2 5 mrem <1%

Average Riverflow past BFN (cubic feet per second): 77,377 Po uiation Doses Total, Body Dose 5.0E-01 man-rem Maximum Organ Dose (organ) 5.9E-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).

Page 9 of 66 Radiological Impact Assessment Browns Ferry Nuclear Plant January - June 1993 Table 2B Doses from Liquid ENuents Second Quarter Individual Doses rem Age Group Organ Dose Pathway Dose Quarteriy Percent of Limit Limit Adult Total Bod Water In estion 1.4E-04 Fish In estion 2.2E-02 Recreation 4.8E-03 Total 2.7E%2 1.5 mrem 1.8 %

Teen Liver Water In estion 1.7E-04 Fish In estion 3.4E-02 Recreation 4.8E-03 Total 3.9E<2 5 mrem 1%

Child Th roid Water In estion 7.4E-06 Fish In estion 1.4E-05 Recreation 4.8E-03 Total 4.8E<3 5 mrem 1%

Average Riverfiow past BFN (cubic feet per second): 35,514 Po ulation Doses Total Body Dose 2.8E-01 man-rem Maximum Organ Dose (organ) 3.9E-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).

Page 10 of 66 Radiological Impact Assessment Browns Ferry Nuclear Plant January - June 1993 Table 3 Total Dose from Fuel Cycle Dose First Second Third Fourth Quarter Quarter Quarter Quarter Total Body or any Organ exce tth roid Total bod air submersion 6.1E-03 3.8E-04 N/A N/A Critical o an dose air 1.6E-02 1.1E-02 N/A Totalbod dose li uid 5.4E-02 2.7E-02 N/A Maximum o an dose li uid 6.7E-02 3.9E-02 NIA N/A Direct Radiation Dose 0.0E-00 0.0E-00 NIA N/A Total 1.4E-01 7.7E-02 N/A N/A Cumulative Total Dose (Total body or any other 2.2E-01 or an mrem Annual Dose Limit mrem 2.50E+01 Percent of Limit (1%

Th roid Dose mrem Total bod air submersion 6.1E-03 3.8E-04 N/A N/A Th roid dose airborne 1.4E-02 4.6E-03 N/A N/A Totalbod dose li uid 5.4E-02 2.7E-02 N/A NIA Th roiddose li uid 4.0E-02 4.8E-03 N/A N/A Direct Radiation Dose O.OE-00 0.0E-OO NIA N/A Total 1.1E-01 3.7E-02 N/A N/A Cumulative Total Dose Th roid mrem 1.5E-01 Annual Dose Limit mrem 7.50E+01 Percent of Limit (1%

Radiological Impact Assessment Browns Ferry Nuclear Plant January - June 1993 Table 4A Joint Frequency Distribution in Percent for Ground Level Releases First Quarter

Page ll of 66 JOINT PERCENTAGE FREQUENCIES OF PEED BY WIND DIRECTION FOR SFN mpact STABILITY CLASS A (DELTA T<I-1.9 C/100 M) Jan.-June 1993 BROWNS FERRY NUCLEAR PLANT JAN 1, 93 - MAR 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 0.0 0.0 0.0 0.0 0.0 0.097 0.145 0.0 0.0 0.242 HNE 0.0 0.0 0.0 0.048 Q.Q48 0.581 0.291 0.0 0.0 0.969 HE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 ' 0.0 0.0 ENE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 ' 0.0 0.0 E 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Q.Q 0.0 ESE 0.0 0.0 0.0 0.097 0.145 0.0 0.0 0.0 0.0 0.242 SE 0.0 0.0 0.048 0.630 0.048 0.048 0 ' 0 ~ 0 0.0 0.775 SSE 0 ' 0.0 0.048 0.388 0.097 0.0 0.0 0.0 0.0 0.533 S 0.0 0.0 0.097 0.097 0.048 0.0 0.0 0.0 0.0 0.242 SSW 0 ' 0.0 0.048 0.097 0.0 0.0 0.0 0.0 0.0 0.145 SW 0.0 0.0 0.0 0.0 0.0 0.0 0 ' 0 ' 0.0 0.0 WSW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 W 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 WNW 0.0 0.0 0.0 0.0 0.0 0.0 0.048 0.0 Q.Q 0.048 HW 0.0 0.0 0.0 0.0 0.0 0.145 0 ' 0.0 0.0 0.145 HHW 0.0 0.0 0.0 0.0 0.0 0.291 0.097 0.0 0.0 0.388 SUBTOTAL 0 ~0 0.0 0.242 1.357 0.388 1.163 0.581 0 ' 0.0 3 731 TOTAL HOURS OF VALID STABILITY OBSERVATIOHS 2080 TOTAL HOURS OF STABILZTY CLASS A 80 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY CLASS A 77 TOTAL HOURS OF VALID WIND DZRECTZOH-WZHD SPEED-STABILITY OBSERVATIONS 2064 TOTAL HOURS CALM ~ 0 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 10.03 AND 45 30 METERS WIND SPEED AHD DZRECTIOH MEASURED AT THE 10.42 METER LEVEL DATE PRINTED: 05/04/93 MEAN WIND SPEED ~ ' ~ 6 MPH NOTE: TOTALS AHD SUBTOTALS ABOVE ARE OBTAINED FROM UHROUNDED NUMBERS

Page 12 o JOINT PERCENTAGE FREQUENCIES OF PEED BY WIND DIRECTION FOR STABILITY CLASS B (-1. 9 < DELTA-T<~-1. 7 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 93 - MAR 31, 93 WIHD WIND SPEED(MPH)

DIRECTION 4.6-1.4 1.6-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >>24.5 TOTAL N 0.0 0.0 .0 0.097 0.097 0.194 0.0 0.0 0.0 0.388 NNE 0.0 0.0 .0 0.097 0.097 0.145 0.048 0.0 0.0 0.388 NE 0 ' 0.0 .0 0.0 0 ' 0.339 0.048 0.0 0.0 0.388 ENE 0.0 0.0 .0 0.0 0.0 0.0 0.0 0.0 0.0 0~0 E 0.0 0.0 .0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ESE 0.0 0.0 .0 0.145 0.0 0.0 0.0 0.0 0.0 0.145 SE 0.0 0.0 .0 0.291 0.097 0.0 0.0 0.0 0.0 0.388 SSE 0.0 0.0 .097 0.145 0.0 0.0 0.0 0.0 0.0 0.242 S . 0.0 0.0 .048 0.0 0.0 0.0 0.0 0.0 0.0 0.048 SSW 0.0 0.0 .048 0.097 0.0 0.0 0.0 0.0 0.0 0.145 SW 0 ' 0.0 .0 0.048 0.0 0.0 F 0 0.0 0.0 0.048 WSW 0.0 0.0 .0 0.048 o.o48 0.0 0.0 0.0 0.0 0.097 W 0.0 0.0 .0 0.0 0.0 0.242 0.0 0.0 0.0 0.242 WHW 0.0 0.0 .0 0.048 0.097 0.388 0.145 0.0 0.0 0.678 NW 0.0 0.0 .0 0.048 0.048 0.291 0.0 0.0 0.0 0.388 HNW 0.0 0.0 .0 0.0 0.048 0.145 0.0 0.0 0.0 0.194 SUBTOTAL 0.0 0 ~0 0 ~ 194 1.066 0.533 1.744 0.242 0.0 0.0 3.779 TOTAL HOURS OF VALID STABILITY OBSERVATZOHS 2080 TOTAL HOURS OF STABILITY CLASS B 80 TOTAL HOURS OF VALID WZHD DIRECTION-WZHD SPEED-STABZLITY CLASS B 78 TOTAL HOURS OF VALID WIHD DZRECTZON-WIND SPEED-STABILITY OBSERVATIONS 2064 TOTAL BOURS CALM 0 METEOROZOGZCAL FACILITY: MET FACZLZTY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLAHT STABILITY BASED OH LAPSE RATE MEASURED BETWEEH 10.03 AHD 45.30 METERS WIHD SPEED AHD DIRECTION MEASURED AT THE 10 ~ 42 METER LEVEL DATE PRINTED! 05/04/93 MEAN WIND SPEED ~ 7.6 MPH HOTE4 TOTALS AHD SUBTOTALS ABOVE ARE OBTAINED'FROM UNROUNDED NUMBERS

Page 13 of 6 JOINT PERCENTACE FREQUENCIES OF PEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA-T(=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 93 - MAR 31, 93 WIND WIND SPEED{MPH)

DZRECTIOH C1ILM 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 ' 0.0 0.0 0.0 0.145 0.048 0.097 0.0 0.0 0.291 HNE 0.0 0.0 0.0 0.097 0.048 0.339 0.048 0.0 0.0 0.533 NE 0.0 0.0 0.0 0.048 0.048 0.194 0 ' 0.0 0.0 0.291 ENE 0.0 0.0 0.0 0.0 0.048 0.048 0.0 0.0 0.0 0.097 E 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ESE 0.0 0.0 0.0 0.194 0.097 0.0 0.0 0.0 0.0 0.291 SE 0.0 0.0 0.242 0.291 0.048 0.0 0.0 0.0 0.0 0.581 SSE 0.0 0.0 0.097 0.048 0.194 0.0 0.0 0.0 0.0 0.339 S 0.0 0.0 0.097 0.048 0.0 0.0 0.0 0.0 0.0 0.145 SSW 0.0 0.0 0.0 0.048 0.048 0.0 0.0 0.0 0.0 0.097 SW 0.0 0.0 0.0 0.097 0.0 0.0 0.0 0.0 0.0 0.097 WSW 0.0 0.0 0.0 0.097 0.0 0.0 0.0 0.0 0.0 0.097 W 0.0 0.0 0.0 0.0 0.048 0.048 0.0 '0.0 0.0 0.097 WHW 0.0 0.0 0.0 0.145 0.048 0.581 0.097 0.0 0.0 0.872 NW 0.0 0.0 0.048 0.097 0.194 0.291 0.0 0.0 0.0 0.630 HHW 0.0 0.0 0.0 0.048 0.048 0.097 0.048 0.0 0.0 0.242 SUBTOTAL 0.0 0.0 0.484 1.260 1.017 1.647 0.291 0.0 0.0 4 '00 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2080 TOTAL HOURS OF STABZLZTY CLASS C 99 TOTAL HOURS OF VALID WIND DZRECTZOH-WIND SPEED-STABILITY CIASS C 97 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2064 TOTAL HOURS CALM 0 METEOROLOGICAL FACZLZTY: MET FACILITY LOCATED 1.3 KM ESE OF BROWHS FERRY HUCIEAR PLANT STABILITY BASED OH LAPSE RATE MEASURED BET'WEEN 10.03 AHD 45.30 METERS WZHD SPEED AHD DIRECTZOH MEASURED AT THE 10 '2 METER LEVEL DATE PRINTED: 05/04/93 MEAN WIND SPEED ~ 7.3 MPH NOTE TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

Page 14 of 6 STABZLZTY CLASS D {-1.5< DELTA-T<=-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1 ~ 93 'AR 314 93 WZND WIND SPEED(MPH)

DIRECTION CALM 0. 6-1. 4 2.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 24.5 TOTAL N 0.0 0.048 0.242 0.630 0.630 1.696 0.145 0.0 0.0 3.391 NHE 0.0 0.0 0.388 1 '60 1.550 2.180 0.291 0.0 0.0 5.669 NE 0.0 0.0 0.291 1.453 1.017 0.484 0 ' 0.0 0.0 3.246 ENE 0.0 0.145 0 '81 0.630 0.388 0.097 0.0 0.0 0.0 1.841 E 0.0 0.048 0.388 0.678 0.678 0.0 0.0 0.0 0.0 1.793 ESE 0.0 0.0 0.969 1.357 0.581 0.533 0.0 0.0 0.0 3.440 SE 0.0 0.0 0.533 1.211 0.678 0.775 0.0 0.0 0.0 3.198 SSE 0.0 0.0 1.017 0.436 0.145 0.048 0.0 0.0 0 ' 1.647 S 0.0 0.0 0.242 0.194 0.242 0.0 0.0 0.0 0.0 0.678 SSW 0.0 0 ' 0.0 0.145 0.097 0.048 0.0 0.0 0.0 0.291 SW 0.0 0 ' 0.048 0.048 0.048 0.194 0.0 0.0 0.0 0.339 WSW 0.0 0.0 0.242 0.291 0.145 0.581 0.097 0.0 0.0 1.357 W 0 ' 0.0 0.097 0.484 0.630 1.793 0.0 0.0 0.0 3.004 WNW 0 ' 0 ' 0.0 0.581 1.163 1.599 1.453 0.0 0.0 4.797 NW 0.0 0.0 0.048 0.581 0.533 1.357 0.630 0.048 0.048 3.246 HHW 0.0 0.0 0.097 0.242 0.388 1.502 0.097 0.0 0.0 2.326 SUBTOTAL 0.0 0.242 5.184 10.223 8.915 12.888 2.713 0.048 0.048 40.262 TOTAL HOURS OF VALID STABZLIT'Y OBSERVATIONS 2080 TOTAL HOURS OP STABILITY CLASS D 833 TOTAL HOURS OF VALID WIND DIRECTZON-WZHD SPEED-STABILITY CLASS D 831 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABZLITY OBSERVATIONS 2064 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWHS PERRY NUCLEAR PIAHT STABILITY BASED OH LAPSE RATE MEASURED BETWEEN 10.03 AHD 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT THE 10 '2 METER LEVEL DATE PRINTED: 05/04/93 MEAN WIND SPEED ~ 6 9 MPH NOTE: TOTALS AHD SUBTOTALS ABOVE ARE OBTAINED FROM UHROUHDED NUMBERS

i Page 15 Of 6 ~

STABILITY CLASS E (-0 ~ 5< DELTA-T~24.5 TOTAL N 0.009 0.0 0.484 0.969 0.872 0.533 0.0 0.0 0.0 2.868 HNE 0.005 0.0 0.242 1.357 1.114 0.727 0.048 0.0 0.0 3.493 NE 0.011 0.048 0.533 0.533 0.194 0.048 0.0 0.0 0.0 1.367 ENE 0.014 0.145 0.581 0.242 0 ~ 097 0.0 0.0 0.0 0.0 1.079 E 0.014 0.145 0.630 0.775 0.0 O.O48 0.0 a.a 0.0 1.613 ESE 0.017 0.145 0.775 0.630 0.242 0.0 0.0 0.0 0.0 1.810 SE 0.027 0.194 1.260 1.502 0.921 0.291 0.0 0.0 0.0 4.194 SSE 0.032 0.291 1.405 1.114 0.581 0.0 0.0 0.0 0.0 3.423 S 0.013 0.242 0.436 0.242 0.048 0.533 0.048 0.0 0.0 1.563 SSW 0.004 0 ~ 048 0.145 0.0 0.048 O.O48 0.0 0.0 0.0 0.294 SW 0.005 0 ~ 0 0.291 0.048 0.0 0.048 0.0 0.0 0.0 0.393 WSW 0.014 0.097 0.678 0.436 0.048 0.242 0.048 0.0 0.0 1.565 W 0.007 0.048 0.339 0.678 0.194 0.097 0.0 0.0 0.0 1.364 WNW 0.005 0.0 0.291 0.339 0.097 0.242 . 0.0 0.0 0.0 0.974 NW 0.008 0.048 0.388 0.484 0.339 0.339 0.048 0.0 0.0 1.655 NNW 0 ~ 008 0 ' 0.436 0.630 0.339 0.436 0.0 0.0 0.0 1.849 SUBTOTAL 0.194 1.453 8.915 9.981 5.136 3.634 0.194 0.0 0.0 29.506 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2080 TOTAL HOURS OF STABILITY CLASS E 612 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 609 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2064 TOTAL HOURS CALM 4 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABZLITY BASED ON LAPSE RATE MEASURED BETWEEN 10.03 AND 45.30 METERS WIND SPEED AHD DIRECTION MEASURED AT THE 10. 42 METER LEVEL DATE PRZNTED: 05/04/93 MEAN 'WIND SPEED ~ 4.7 MPH NOTE: TOTALS AHD SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

Page 16 of 6 JOINT PERCENTAGE FREQUENCIES Or PEED BY WIND DIRECTION FOR STABILITY CI ASS F { 1. 5< DELTA-T<= 4 .0 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 93 MAR 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 H 0.015 0 '48 0.194 0.630 0.097 0.048 0.0 0.0 0.0 1.032 NNE 0.020 0.097 0.242 0.339 0.533 0.145 0.0 0 ' 0.0 1 377 NE 0.017 0.097 0.194 0.0 ~ 0.048 0.0 0.0 0.0 0.0

~

0.357 ENE 0.003 0.0 0.048 0.097 0.0 0.0 0.0 0.0 0.0 0.148 E 0 '23 0.048 0.339 0.436 0 '48 0 ' 0.0 0.0 0.0 0.895 ESE 0.035 0.145 0.436 0.194 0.0 0.0 0.0 0.0 0.0 0 '10 SE 0.047 0.194 0.581 0.339 0 F 291 0.0 0.0 0.0 0.0 1.452 SSE 0.052 0.242 0.630 0.533 0.145 0.097 0.0 0.0 0.0 1.700 S 0.023 0.048 0.339 0.194 0.048 0.242 0.0 0.0 0.0 0 '95 SSW 0.017 0.097 0.194 0.097 0.0 0.0 0.0 0.0 0.0 0 '05 SW 0.009 0 ' 0.145 0.145 0.048 0.048 0.0 0.0 0 ' 0.396 WSW 0.003 0.048 0.0 0.0 0.0 0.0 0.0 0.0 0 ' 0.051 W 0.003 0.0 0.048 0.097 0.0 0.0 0.0 0.0 0.0 0.148 WNW 0.012 0.0 0.194 0.0 0.0 0.0 0.0 0.0 0.0 0.205 HW 0.009 0.0 0.145 0.194 0.048 0.0 0.0 0.0 0.0 0.396 NNW 0.003 0.0 0.048 0.194 0.291 0.0 0.0 0.0 0.0 0.536 SUBTOTAL 0 '91 1.066 3.779 ,3. 488 1.599 0.581 0.0 0.0 0.0 10.804 TOTAL HOURS Or VALID STABILZTY OBSERVATIONS 2080 ToTAl. HoURs or STABILITY Cr.Ass r 225 T0TAL H0URs or vALID wzHD DIREcTIGH-wzND spEED-sTABILITY cLAss F 223 TOTAL HOURS Or VALID WZHD DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2064 TOTAL HOURS CALM 6 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWHS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 10. 03 AHD 45. 30 METERS WIND SPEED AHD DZRECTIOH MEASURED AT THE 10.42 METER LEVEl DATE PRINTED: 05/04/93 MEAN WZHD SPEED ~ 3.8 MPH NOTE- TOTALS AHD SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

Cl Page 17 o JOINT PERCENTAGE FREQUENCIES OF PEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4. 0 C/100 M}

BROWNS FERRY NUCLEAR PLANT JAN 1 i 93 MAR 31 i 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 >>24.5 TOTAL H 0.054 0.0 0.727 0.242 0 '97 0.0 0.0 0.0 0.0 1.120 HNE 0.047 0 '94 0.436 0.194 0.048 0 ~ 0 0 ' 0.0 0.0 0.919 HE 0.011 0.097 0,.048 0.0 0.0 0.0 0.0 0.0 0.0 0.156 ENE 0.014 0.194 0.0 0.0 0.0 0 ' 0.0 0.0 0.0 0.208 E 0.029 0.145 0.242 0.048 0.0 0.0 0.0 0.0 0.0 0 F 465 ESE 0.025 0.145 0.194 0.0 0.0 0.0 0.0 0.0 0.0 0.364 SE 0 039 0.291 0.242 0.145 0 ' 0.0 0.0 0.0 0.0 0.718 SSE 0.068 0.242 0.678 0.388 0.0 0.0 0.0 0.0 0.0 1.376 S 0.007 0.0 0.097 0.0 0.0 0.0 0.0 0.0 0.0 0.104 SSW 0.0 0.0 0.0 0.0 0.0 0 ' 0 ' 0.0 0.0 0.0 SW 0.007 0.097 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.104 WSW 0.0 0.0 0.0 0.048 0.0 0.0 0.0 0.0 0.0 0.048 W 0.004 0.048 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.052 WHW 0.011 0.097 0.048 0.0 0.0 0.0 0.0 0.0 0.0 0.156 HW 0.032 0.097 0. 339'.484 0.145 0.0 0.0 0.0 0.0 0.0 0.614 HNW 0.039 0.048 0.242 0.0 0' 0.0 0.0 0 ' 0.815 SUBTOTAL 0.388 1.696 3.537 1.453 0.145 0.0 0.0 0.0 0.0 7.219 TOTAL HOURS OF VALZD STABILITY OBSERVATIONS 2080 TOTAL HOURS OF STABILITY CLASS G 151 TOTAL HOURS OF VAI ID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 149 TOTAL HOURS OF VALID WIND DZRECTIOH-WIND SPEED-STABILITY OBSERVATZOHS 2064 TOTAL HOURS CALM 8 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWHS FERRY NUCLEAR PLANT STABILITY BASED OH LAPSE RATE MEASURED BETWEEN 10. 03 AHD 45. 30 METERS WIND SPEED AND DIRECTION MEASURED AT THE 10.42 METER LEVEl DATE PRINTED: 05/04/93 MEAN 'WIND SPEED ~ 2.3 MPH NOTE: TOTALS AHD SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

Cl Radiological impact Assessment Browns Ferry Nuclear Plant January - June 1993 Table 4B Joint Frequency Distribution in Percent for Ground Level Releases Second Quarter

Page 18 of 6 JOINT PERCENTAGE FREQUENCIES OF SPEED BY WIND DIRECTION FOR STABILITY CLASS h (DELTA T<~-1.9 C/100 'M)

BROWNS FERRY NUCLEAR"PLANT APR 1, 93 JUN 30, 93 WIND WIND SPEED{MPH)

DIRECTZOH 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18 ' 1'-24.4 )~24.5 TOTAL H 0.000 0.000 0.000 0.000 0.049 0 '38 0.000 0.000 Q.QQO 0.486 HNE 0.000 0.000 0.000 0.000 0.000 0.584 0.000 0.000 0.000 0.584 HE 0.000 0.000 0.000 0.000 0.000 0.000 0.097 0.000 0.000 0.097 ENE O.OQO Q.OOO 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 0.340 0.146 0.000 0.000 0.000 0.000 0.486 SE 0.000 0.000 0.632 1.605 0.000 0.000 0.000 0.000 0.000 2.237 SSE 0 F 000 0.000 0.924 1.167 0.000 0.049 0.000 0.000 0.000 2.140 S 0 F 000 0.000 0.730 1.167 0.195 0.049 0.000 0.000 0.000 2.140 SSW 0.000 0.000 0.097 0.535 0.000 0 F 000 0.000 0.000 0.000 0.632 SW 0.000 0.000 0.146 0. 195 0.049 0.000 0.000 0.000 0.000 0.389 WSW 0.000 0.000 0.000 0.340 0.097 0.049 0.000 0.000 0.000 0.486 W 0.000 0.000 0.000 0.097 0.000 0.000 0 '49 0.000 0.000 0.146 WHW 0.000 0.000 0.000 0.049 0.049 0.000 0 F 000 0.000 0.000 0.097 HW 0 F 000 0.000 0 000 'Q. 000 0.049 0.389 0.292 0.000 0.000 0.730 NHW 0.000 0.000 0.000 0.049 0.097 0.195 0.000 0.000 0.000 0.340 SUBTOTAL 0.000 0.000 2.529 5.545 0 ..730 1.751 '.438 0.000 0.000 10.992 TOTAL HOURS OF VALID STABILITY OBSERVATIOHS 2167 TOTAL HOURS OF STABILITY CLASS A 245 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 226 TOTAL HOURS OP'ALID WIND DZRECTZOH-WIND SPEED-STABILITY OBSERVATIONS 2056 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLAHT STABILITY BASED OH DELTA-T BETWEEN 10 ~ 03 AHD 45. 30 METERS WIND SPEED AHD DIRECTZOH MEASURED AT 10.42 METER LEVEL DATE PRINTED: 30-JUL-93 MEAN WIND SPEED ~ 5. 31 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

~ 5.Q Page 19 O 6 JOINT PERCENTAGE FREQUENCIES OP SPEED BY WIND DIRECTION FOR STABILITY CLASS BE (-1.9< DELTA T<~-1.7 C/100 M)

BROWHS FERRY NUCLEAR PLANT APR 1, 93 - JUH 30, 93 WIND WZHD SPEED(MPH)

DZRECTIOH 0.6-1.4 1 '-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 0.000 0.097 0.049 0.000 0.000 0.000 0.146 HHE 0.000 0.000 0.000 0.000 0.097 0.195 0.000 0.000 0.000 0.292 HE 0.000 0.000 0.000 0.049 0.049 0.097 0.000 0.000 0.000 0.195 EHE 0.000 0.000 0.000 0.000 0.049 0.000 0.000 0.000 0.000 0 ~ 049 E 0.000 0.000 0.049 0.000 0.000 0.000 0.000 0.000 0.000 0.049 ESE 0.000 0.000 0.049 0.000 0.000 0.000 0.000 0.000 0.000 0.049 SE 0.000 0.000 0.535 0.389 0.000 0.000 0.000 0.000 0.000 0.924 SSE 0.000 0.000 0.243 0.049 0.049 0.000 0.000 0.000 0.000 0.340 S 0 F 000 0.000 0.584 0.049 0.097 0.097 0.000 0.000 0.0.00 0.827 SSW 0 F 000 0.000 0.195 0.097 0.000 0.000 0.000 0 F 000 0.000 0.292 SW 0.000 0.000 0.146 0.340 0.000 0.000 0.000 0.000 0.000 O.486 WSW 0.000 0.000 0.049 0.195 0.049 0.146 0.000 0.000 0 000 0.438 W 0.000 0.000 0.000 0.146 0.097 0.049 0.000 0.000 0.000 0.292 WHW 0.000 0.000 0.000 0.146 0.195 0.049 0.000 0.000 o.ooe 0.389 HW 0.000 0.000 0.049 0.000 0.243 0.195 0.097 0.000 0.000 0.584 HNW 0.000 0.000 0.000 0.000 0.049 0.243 05000 0.000 0.000 0.292 SUBTOTAL 0.000 0.000 1.897 1.459 1.070 1.119 0.097 0.000 0.000 5.642 TOTAL HOURS OF VALID STABZLITY OBSERVATIONS 2167 TOTAL HOURS OF STABILITY CLASS B 121 TOTAL HOURS OF VALID WIHD DIRECTION-WIND SPEED-STABILITY CLASS B 116 TOTAL HOURS OF VALID WIND DZRECTZOH-WIND SPEED-STABILITY OBSERVATZOHS 2056 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AHD 45.30 METERS WIND SPEED AHD DIRECTIOH MEASURED AT 10.42 METER LEVEL DATE PRINTED: 30-JUZ-93 MEAN WIND SPEED ~ 5 ~ 37

.NOTE TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Page 20 o 6 JOINT PERCEHTAQE FREQUENCIES OF SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-l. 7< DELTA T<~-l. 5 C/100 M)

BROWHS FERRY HUCLEAR PLANT APR 1 ~ 93 JUH 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 2~ .5 TOTAL H 0.000 0.000 0.000 0.000 0.097 0.049 0.049 0.000 0.000 0.195 NHE 0.000 0.000 0.000 0.000 0.049 0 '49 0.146 F 000 0.000 0.000 0.243 HE 0.000 0.000 0.049 0.000 0.000 0.000 0.000 0.000 0.049 EHE 0.000 0 F 000 0.000 0.000 0.000 0.049 0.000 0.000 0.000 0.049 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 0.146 0.049 0.000 0.000 0.000 0.000 0.000 0.195 SE 0.000 0.000 0.584 0.146 0.000 0.000 0.000 0.000 F 000 0.730 SSE 0.000 05000 0.632 0.049 0.000 F 000 0.000 0.000 0.000 0.681 S 0.000 0.000 0.000 0.000 0.243 0.049 0.000 0 '49 0.000 0.000 0.000 0.340 SSW 0.097 0.097 0.000 0.000 0.000 0.000 0.000 0 '95 SW 0.000 0.000 0.195 0.243 0.000 0.000 0.000 0.000 0.000 0 '38 WSW 0.000 0.000 0.195 F 243 0.000 0.097 0.000 0.000 0.000 0.535 W 0.000 0.000 0.049 0.438 0.049 0.097 0.049 0.000 0.000 0.681 WNW 0.000 0.000 0.097 0.195 0.292 0.146 0.000 0.000 0.000* 0.730 HW 0.000 0.000 0.000 0.146 0.340 0.195 0.000 0.000 0.000 0.681 HHW 0.000 0.000 0.000 0.049 0'. 097 0.146 0.000 0.000 0.000 0.292 SUBTOTAL 0.000 0.000 2.237 1.800 0.924 0.973 0.097 0.000 0.000 6.031 TOTAL HOURS OF VALID STABILITY OBSERVATZOHS 2167 TOTAL HOURS OF STABILITY CLASS C 129 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 124 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIOHS 2056 TOTAL HOURS CALM 0 METEOROLOQZCAL FACILITY: BROWHS FERR'I NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10 '3 AHD 45.30 METERS WIHD SPEED AHD DIRECTION MEASURED AT 10.42 METER LEVEL 5

DATE PRIHTED: 30-JUL-93 MEAN WIND SPEED 55 5.06 HOTE- TOTALS AHD SUBTOTALS ARE OBTAINED FROM UHROUHDED NUMBERS

Page 21 of 6 JOINT PERCENTAGE FREQUENCIES OF SPEED BY WIND DIRECTION FOR p

STABIIITY CLASS D {-1. 5< DELTA T<~-0. 5 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 93 JUH 30, 93 WIND WIND SPEED(MPH)

'DIRECTZOH 0. 6-1. 4 1.5-3 ' 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >~24.5 TOTAL H 0.004 0.097 0.146 0.535 0.535 0.973 0.000 0.000 0.000 2.290 HHE 0.006 0.000 0.340 0.389 0.486 0.292 0.000 0.000 0.000 1.514 NE 0.005 0 F 000 0.292 0.389 0.438 0.243 0.000 0.000 0.000 1.367 EHE 0 '07 0.000 0.389 0.340 0.146 0.097 0.000 0.000 0 F 000 0.979 E 0.007 0.000 0.389 0.438 0.097 0.146 0.000 0.000 0.000 1.077 ESE 0.016 0.097 0.875 0 '24 0.389 0.146 0.000 0.000 0.000 2.448 SE 0.030 0.243 1.508 0.535 0.000 0.000 0.000 0.000 0.000 2.316 SSE 0.023 0.195 1.167 0.389 0.000 0.049 0.000 0.000 0.000 1 '23 S 0.022 0.292 1.021 0.535 0.584 0.195 0.000 0.000 0.000 2.649 SSW 0.017 0.097 0.924 0.875 0.000 0.000 0.000 0.000 0.000 1.914 SW 0.013 0.097 0.681 0.389 0.146 0.049 0.000 0.000 0.000 1.375 WSW 0.022 0.146 1.167 0.827 0.146 0.827 0.097 0.000 0.000 3.232 W 0.010 0.049 0.535 0.730 0.486 0.681 0.195 0.000 0.000 2.685 WHW 0.002 0.000 0.146 0.681 0.535 0.584 0.292 0.000 0.000 2.240 HW 0.002 0.000 0.146 0.389 0.486 0.730 0.535 0.000 0.000 2.288 NHW 0.007 0.000 0.438 0.778 0.195 0.730 0.195 0.000 F 000 2.342 SUBTOTAL 0.195 1.313 10.165 9.144 4.669 5.739 1.313 0.000 0.000 32.539 TOTAL HOURS OF VALID STABZLZTY OBSERVATIONS 2167 TOTAL HOURS OF STABILITY CLASS D 704 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 669 TOTAL HOURS OF VALID WIND DIRECTZOH-WIND SPEED-STABILITY OBSERVATIONS 2056 TOTAL HOURS CALM 4 METEOROLOGICAL FACILITY: BROWHS FERRY NUCLEAR PLANT STABILITY BASED OH DELTA-T BETWEEN 10 '3 AHD 45.30 METERS WIND SPEED AHD DZRECTIOH MEASURED AT 10 ~ 42 METER LEVEL DATE PRINTED: 30-JUL-93 MEAN WZHD SPEED ~ 5.14 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Page 22 of JOINT PERCENTACE FREQUENCIES OF SPEED BY WIND DIRECTION FOR STABILITY CLASS E (-0. 5< DELTA T<% 1 4 5 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 93 JUH 30, 93 WIND WIND SPEED(MPH)

DIRECTION 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 H 0.028 0.049 0.535 0.681 0.097 0.000 0.000 0.000 0.000 1.390 NHE 0.026 0.049 0.486 0.535 0.340 0.049 0.000 0.000 0.000 1 '85 HE 0.030 0.195 0.438 0.146 0 ~ 292 0.097 0.000 0.000 0.000 1.198 EHE 0.042, 0.146 0.730 0.146 0.049 0.000 0.000 0.000 0.000 1.112 E 0.091 0.243 1.654 0.584 0.049 0.097 0.000 0.000 0.000 2.718 ESE 0.106 0.340 1.848 0.875 0.292 0.097 0.000 0.000 0.000 3.559 SE 0.075 0. 681 0.875 0.486 0.049 a.a49 o.aoo 0.000 0.000 2.215 SSE 0 ~ 068 0.730 0.681 0.243 0.632 0.097 0.000 0 ~ 000 0.000 2. 451 S 0.056 0.389 0.778 0.535 0.584 0.438 0.000 0.000 0.000 2.780 SSW 0.045 0 ~ 292 0.632 0.097 0.000 0.000 0.000 0.000 0.000 1.066 SW 0.033 0.340 0.340 0.000 0.000 0.000 0.000 0.000 0.000 0.714 WSW 0.054 0.292 0.827 0.243 0.000 0.000 0.000 0.000 0.000 1.416 W 0.040 0.195 0.632- 0.097 0 ~ 049 0.000 0.000 0.000 0.000 1.013 WNW 0.005 0.000 0.097 0.146 0.000 0.000 0.000 0.000 0.000 0.248 HW 0.014 0.097 0.195 0.292 0.097 0.097 0.000 0.000 0.000 0.792 NHW 0.016 0.000 0.340 0.243 0.389 0.049 0, ~ 000 0.000 0.000 1.038 SUBTOTAL 0.730 4.037 11 '89 5.350 2.918 1.070 0.000 0.000 0.000 25.195 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2167 TOTAL HOURS OF STABILITY CLASS E 553 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 518 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABZLZTY OBSERVATIONS 2056 TOTAL BOURS CALM 15 METEOROLOGICAL FACILITY: BROWHS FERRY NUCLEAR PLANT STABILITY BASED OH DELTA-T BETWEEN 10 '3 AHD 45.30 METERS WIND SPEED AHD DZRECTZOH MEASURED AT 10.42 METER LEVEL DATE PRINTED: 30-JUL-93 MEAN WIND SPEED  % 3.26 NOTE- TOTALS AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Page 23 of 6 JOINT PERCENTAGE FREQUENCIES Or SPEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1.5< DELTA T<~ 4.0 C/100 M)

BROWHS FERRY NUCLEAR PLANT APR 1, 93 - JUN 30, 93 WZHD WIND SPEEDtMPH)

DIRECTIOH a.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 H 0.062 0.097 0.778 0.195 0 049 0.000 0.000 0.000 0.000 1. 181 HHE 0.048 0.438 0.243 0.146 Q.QQQ o.oao Q.QQQ 0.000 0.000 0. 875 HE 0.045 0.340 0.292 0.195 0.049 0.000 0.000 0.000 0.000 0.920 EHE 0.066 0 '40 0.584 0.486 0.000 0.000 0.000 0.000 0.000 1.476 E 0.090 0.097 1.167 0.195 0.000 0.000 0.000 Q.QQQ Q.aao 1.549 ESE -0.093 0.438 0.875 0.146 0.000 0 000 0.000 0.000 0.000 1.552 SE 0.062 0.389 0.486 0.097 0*000 0.000 0.000 0.000 0.000 1.035 SSE 0.090 0.486 0.778 0.292 0.195 0.000 0.000 0.000 0.000 1.841 S 0.028 0 '97 0.292 0.195 0.243 0.000 0.000 0.000 0.000 0.854 SSW 0.007 0.097 0.000, 0.000 0 000 0.000 0.000 0.000 0.000 0.104 SW 0.003 0.000 0.049 0.000 0 ~ 000 0.000 0.000 0.000 0.000 '.052 WSW 0.003 0.049 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.052, W 0.017 0.097 0.146 0.000 0 000 0.000 0.000 0.000 0.000 0.260 WHW 0.000 0.000 0.000 0.000 0 000 0 ~ 000 0.000 0.000 0.000 0.000 HW 0.007 0.000 0.097 0.000 0 000 0.049 0 ~ 000 0.000 0.000 0.153 HHW 0.010 0.000 0.146 0.243 0.049 0.049 0.000 0.000 0.000 0.497 SUBTOTAL 0.632 2 '67 5.934 2.189 0.584 0.097 0.000 a.ooo 0.000 12.403 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2167 TOTAL HOURs Or STABILITY CLhss r 263 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS 255 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2056 TOTAL HOURS CALM 13 METEOROLOGZCAI FACILITY: BROWHS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10 ~ 03 AHD 45 ~ 30 METERS WIND SPEED AHD DIRECTION MEASURED AT 10.42 METER LEVEL DATE PRINTED: 30-JUL-93 MEAN WIND SPEED ~ 2.52 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Cl Page 24~ of 6 JOINT PERCENTAGE FREQUENCIES OF SPEED BY WIND DIRECTZOH FOR STABILITY CLASS G { DELTA T > 4. 0 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 93 - JUH 30, 93 WIND WIND SPEED(MPN)

DIRECTION 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >~24.5 TOTAL H 0.298 0.389 0.875 0.097 0.000 0. 000 0.000 0.000 0.000 1.660 HNE 0.161 0.389 0.292 0.486 0.049 0.000 Q.QQQ 0.000 Q.QQQ 1. 37'7 HE 0.126 0.340 0.195 0.000 0.000 0.000 0.000 0.000 0.000 0.661 EHE 0.149 0.243 0.389 0.049 0.000 0.000 0.000 0.000 0.000 0 '30 E 0.092 0.097 0.292 0.049 0.000 0.000 0.000 0.000 0.000 Q.530 ESE 0.069 0.195 0.097 0.000 0.000 0.000 0.000 0.000 0.000 0.361 SE 0.057 0.097 0.146 0.049 0.000 0.000 0.000 0.000 0.000 0.349 SSE 0.092 0.195 0.195 0.049 0 F 000 0.000 0 F 000 0.000 0.000 0.530 S 0.034 0.049 0.097 0.000 0.000 0.000 0.000 0.000 0.000 0.180 SSW 0.011 0.049 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.060 SW 0.011 0 '49 0.000 0.000 0.000 0.000 0.000 0.000 0'. 000 0.060 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 000 0.000 0.000 W 0.034 0.146 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 ~ 180 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 HW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 HNW 0.080 0.195 0.146 0.000 0.000 0.000 0.000 0 F 000 0.000 0.421 SUBTOTAL 1.216 2.432 2.724 0.778 0.049 0.000 0.000 0.000 0.000 7.198 TOTAL HOURS OF VALID STABZLITY OBSERVATIONS 2167 TOTAL HOURS OF STABILITY CLASS G 152 TOTAL HOURS OF VALID WIHD DZRECTIOH-WIND SPEED-STABILITY CLASS G 148 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2056 TOTAL HOURS CALM 25 METEOROLOGICAL FACILITY BROWHS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AHD 45.30 METERS WIND SPEED AND DZRECTZOH MEASURED AT 10.42 METER LEVEL DATE PRINTED: 30-JUI-93 MEAN WIND SPEED ~ 1.72 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

"4 Radiological Impact Assessment Browns Ferry Nuclear Plant January - June'1993 Table 5A Joint Frequency Distribution in Percent for Split Level Releases Ground Level Portion First Quarter

Page 25 of SPLIT JOINT PERCENTAGE FREQUENCIES HD SPEED BY WIND DIRECTION FOR STABILITY CLASS A {DELTA T<~-1.9 C/100 M)

BROWNS FERRY HUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 93 MAR 31, 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 0.0 0.0 0.0 0.0 0.0 0.015 0.029 0.0 0.0 0.044 HNE 0.0 0.0 0.0 0.001 0.002 0.092 0.063 0.0 0.0 0.159 HE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 EHE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 E 0.0 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ESE 0.0 0.0 0.0 0.003 0.023 0.0 0.0 0.0 0.0 0.026 SE 0.0 0.0 0.000 0.023 0.008 0.010 0.0 0.0 0.0 0.041 SSE 0.0 0.0 0.000 0.024 0.021 0.0 0.0 0.0 0.0 0.046 S 0.0 0.0 0.0 0.001 0.010 0.0 0.0 '0.0 0.0 0. 011 SSW ~0 0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SW 0.0 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 WSW 0.0 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 W 0.0 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 WHW 0.0 0.0 0.0 0.0 0.0 0.0 0.009 0.0 0.0 0.009 HW 0.0 0.0 0.0 0.0 0.0 0.022 0.0 0.0 0.0 0.022 HNW 0.0 0.0 0.0 0.0 0.0 0.046 0.019 0.0 0.0 0 ~ 066 SUBTOTAL 0.0 0 ' 0.001 0.053 0.063 0.186 0.120 0 ' 0.0 0.424 TOTAL HOURS OF VALID OBSERVATIONS 2065.000 TOTAL HOURS OF'ROUND LEVEL RELEASE 251 '70 TOTAL HOURS OF STABILITY CLASS h 8.750 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS A 8.750 METEOROLOGICAL FACILITY: MET FACZLITY LOCATED 1 3 KM ESE OF BROWHS FERRY NUCLEAR PLANT STABILITY BASED OH DELTA-T BETWEEN 10 '3 WZHD DIRECTION MEASURED AT 10.42 METER LEVEL AHD 45.30 METERS WIHD SPEED MEASURED AT 10.42 METER LEVEI EFFLUEHT VELOCITY ~ 12.60 M/S DATE PRINTED: 05/04/93 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Page 26 of 6 SPLZT JOINT PERCENTAGE FREQUENCIES HD SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1.9< DEITA T<~-1.7 C/100 M)

BROWHS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 93 MAR 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 2~ .j TOTAL H 0 ' 0.0 0.0 0.001 0.007 0.029 0 ' 0.0 0.0 0.037 NHE 0.0 0.0 0.0 0.0 0.007 0.021 0.009 0' 0.0 0.037 NE 0.0 0.0 0.0 0.0 0.0 0.041 0.009 0.0 0.0 0.050 ENE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 E 0.0 0.0 0.0 0.0 0.0 0 ' 0.0 0 ' 0.0 0.0 ESE 0.0 0.0 0.0 0.010 0.0 0.0 0 ' 0.0 0.0 0.010 SE 0.0 0.0 0.0 0.019 0.024 0.0 0.0 0.0 0.0 0.044 SSE 0.0 0.0 0.001 0.006 0.0 0.0 0.0 0.0 0.0 0.008 S 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0' 0.0 0.0 SSW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 WSW 0.0 0.0 0.0 0.0 0.005 0 ' 0.0 0' 0.0 0.005 W 0.0 0.0 0.0 0.0 0.0 0.039 0 ' 0.0 0 ' 0.039 WNW 0.0 0.0 0.0 0.0 0.009 0.058 0 F 029 0 ' 0.0 0.095 HW 0.0 0.0 0 ' 0.0 0.001 0.043 0.0 0.0 0.0 0.044 HNW 0.0 0 ' 0.0 0.0 0.004 0.020 0.0 0.0 0.0 0.024 SUBTOTAL 0.0 0.0 0.001 0.037 0.057 0.251 0.047 0 ~0 0.0 0.394 TOTAL HOURS OF VALID OBSERVATIONS 2065.000 TOTAL HOURS Ot'ROUND IEVEL RELEASE 251.070 TOTAL HOURS OF STABILITY CLASS B 9.140 TOTAL HOURS OF GROUND IEVEL STABILITY CLASS B 8.140 METEOROLOGICAL l'ACZLITY- MET FACILITY LOCATED 1 ~ 3 KM ESE OF BROWHS FERRY NUCLEAR PLAHT STABILITY BASED OH DELTA-T BETWEEN 10.03 AHD 45 WZND DIRECTION MEASURED AT 10.42 METER LEVEL

'0 METERS WIND SPEED MEASURED AT 10.42 METER LEVEL EFFLUEHT VELOCITY ~ 12.60 M/S DATE PRZNTED: 05/04/93 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Page 27 of 6 SPLIT JOINT PERCENTAGE FREQUEHCZE IHD SPEED BY WIND DIRECTION FOR STABILITY CLASS C t-1.7< DELTA T<~-1.5 C/100 M)

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

DIRECTION CALM 0.6-1.4 3 . 5-3 . 4 3.5-5 ' 5.5-7 ~ ~ 7.5-12.4 12.5-18.4 18.5-24.4 34 ~ 5 TOTAL N 0.0 0 ' 0.0 0.0 0.010 0.008 0.020 0.0 0.0 0.037 HHE 0.0 0.0 0.0 0.0 0.0 0.0 0.001 0.0 0.002 0.060 0 '10 0.0 0.0 0.073 HE 0.002 0.022 0.0 0.0 0.0 0.024 ENE 0.0 0.0 0.0 0.0 0.004 0.006 0.0 0.0 0.0 0.010 E 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ESE 0.0 0.0 0.0 0.010 0.014 0.0 0.0 0.0 0.0 0.024 SE 0.0 0.0 0.000 0.011 0.026 0.0 0.0 0.0 0.0 0.037 SSE 0.0 0.0 0.0 0.0 0.0 0.008 0 '50 0.0 0.0 0.0 0.0 0.158 S 0.0 0.006 0.0 0.0 0.0 ~

0.0 0.0 0.006 SSW 0.0 0 ' 0.0 0.0 0.010 0.0 0.0 0.0 0.0 0.010 SW 0.0 0.0 0.0 0.001 0.0 0.0 0.0 0.0 0.0 0.001 WSW 0.0 0.0 0.0 0.0 0.0 0.0 0 ' 0.0 0.0 0.0 W 0 ' 0.0 0.0 0.0 0.004 0.007 0.0 0.0 0.0 0.011 WHW 0.0 0.0 0.0 0.0 0.004 0.085 0.023 0.0 0.0 0.112 NW 0.0 0.0 0.0 0.0 0.015 0.051 0.0 0.0 0.0 0.066 HHW 0.0 0.0 0.0 0.0 0.005 0.016 0.018 0.0 0.0 0.039 SUBTOTAL 0.0 0.0 0.000 0.037 0.245 0.256 0.071 0.0 0.0 0.608 TOTAL HOURS OF VALID OBSERVATIONS 2065.000 TOTAL HOURS OF GROUND LEVEL RELEASE 251.070 TOTAL HOURS OF STABILITY CLASS C 16.390 TOTAL HOURS OF GROUND LEVEL STABZLITY CLASS C 12.560 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWHS FERRY NUCLEAR PLAHT STABILITY BASED OH DELTA-T BETWEEN 10.03 AHD 45.30 METERS WIND DIRECTION MEASURED AT 10.42 METER LEVEL WIHD SPEED MEASURED AT 10.42 METER LEVEL EFFLUEHT VELOCITY ~ 12.60 M/S DATE PRINTED: 05/04/93 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

i Page 28 O 6 STABILITY CLASS D {-1.5< DELTA T<~-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 93 - MAR 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 '-12.4 12.5-18.4 18.5-24.4 24.5 TOTAL H 0.0 0.0 0.0 0.018 0.057 0.259 0.039 0.0 0.0 0.372 HHE 0.0 0.0 0.0 0.016 0.148 0.353 0.066 0.0 0.0 0.582 HE 0.0 0.0 0.0 '0.042 0.090 0.070 0.0 0.0 0.0 0.201 EHE '0.0 0.0 0.0 0.020 0.038 0.012 0.0 0.0 0.0 0.070 E 0.0 0.0 0.000 0.036 0 '89 0 ' 0.0 0.0 0.0 0.125 ESE 0.0 0.0 0.0 0.0 0.006 0.105 0.086 0 '95 0.0 0.0 0.0 0.292 SE 0.022 '0.138 0.178 0.150 0.0 0.0 0.0 0.488 SSE 0.0 0.0 0.097 0.050 0.037 0 F 029 0.0 0.0 0.0 0.213 S 0.0 0 ' 0.010 0.024 0.046 0.0 0.0 0.0 0.0 0.079 SSW 0.0 0 ' 0.0 0.013 0.026 0.035 0 ' 0 ' 0.0 0.074 SW 0.0 0.0 0.0 0.007 0.010 0.106 0 ' 0.0 0.0 0.123 WSW 0.0 0,. 0 0.000 0.020 0.021 0.118 0.078 0.0 0.0 0.238 W 0.0 0.0 0 ' 0 '15 0.062 0.316 0.0 0 ' 0.0 0.394 WHW 0.0 0 .0 0.0 0.005 0.077 0.260 0:349 0.0 0.0 0.691 HW 0.0 0.0 0.0 0 '07 0.050 0.228 0.177 0.045 0 '48 0.555 HHW 0.0 0.0 0.0 0.008 0.044 0.244 0.044 0.0 0.0 0.339 SUBTOTAL 0.0 0.0 0.136 0.524 1.057 2.274 0.754 0.045 0.048 4.838 TOTAL HOURS OF VALID OBSERVATIONS 2065.000 TOTAI HOURS OF GROUND LEVEL RELEASE 251.070

,, TOTAI HOURS OF STABILITY CLASS D 1219.230 TOTAL HOURS OF GROUHD LEVEL STABILITY CLASS D 99 '00 METEOROLOGICAL FACZIITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWHS FERRY HUCLEAR PLANT STABZLZTY BASED ON DELTA-T BETWEEH 10.03 AHD 45.30 METERS WIND DIRECTION MEASURED AT 10.42 METER LEVEL WIHD SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRINTED: 05/04/93 HOTE: TOTAIS AND SUBTOTAIS ARE OBTAINED FROM UHROUHDED NUMBERS

Page 29 of 6 STABILITY CLASS E {-0. 5< DELTA T<55 1. 5 C/100 M)

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

DIRE CTZOH 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 0.0 0.0 0.007 0.092 0.131 0.094 0.0 0.0 0.0 0.324 NHE 0.0 0.0 0.0 0.122 0.154 0.132 0.015 0.0 0.0 0.423 NE 0.0 0.0 0.013 0.048 0.022 0.007 0.0 0.0 0.0 G.O9O ENE 0.0 0 ~ 002 0 F 012 0.028 0.010 0.0 0.0 0.0 0.0 0.052 E 0.0 0 ~ 003 0.031 0.073 0.0 0.009 0.0 0.0 0.0 0.116 ESE 0.0 0.0 0.043 0.067 0.038 0.0 0.0 0.0 0.0 0.148 SE 0.0 0.0 0.116 0.215 0.216 0.118 0.0 0.0 0.0 0.665 SSE 0.0 0.010 0.175 0.298 0.277 0.0 0.0 0.0 0.0 0.760 S 0.0 0.0 0.035 0.039 0 F 010 0.409 0.048 0.0 0.0 0.541 SSW 0.0 0.0 0.002 0.0 0 ~ 016 0.043 0.0 0.0 0.0 0.062 SW 0 ~ 0 0.0 0.014 0.008 0.0 0.013 0.0 0.0 0.0 0.034 WSW 0.0 0.0 0.006 0.059 0.009 0 ~ 097 0.032 0.0 0.0 0.203 W 0.0 0.0 0.012 0.069 0 031 0.018 0.0 0.0 0.0 0.129 WHW 0.0 0.0 0.001 0.023 0.013 0.041 0.0 0.0 0.0 0.078 NW 0.0 0.0 0.0 0.046 0.047 0.057 0.014 0.0 0.0 0.164 HHW 0.0 0.0 0.011 0.057 0.050 0.077 0.0 0.0 0.0 0.195 SUBTOTAL 0 ' 0 ~ 015 0.476 1.244 1.024 1.115 0.109 0.0 0.0 3.984 TOTAL HOURS OF VALID OBSERVATIOHS 2065.000 TOTAL HOURS OF GROUND LEVEL RELEASE 251.070 TOTAL HOURS OF STABZLITY CLASS E 623.920 TOTAL HOURS OP GROUND LEVEL STABILITY CLASS E 82 '60 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OP BROWHS PERRY HUCLEAR PLAHT STABILITY BASED OH DELTA-T BETWEEH 10.03 AND 45.30 METERS WZND DIRECTION MEASURED AT 10 ~ 42 METER lEVEL WIND SPEED MEASURED AT 10.42 METER IEVEL EFPLUEHT VELOCITY ~ 12.60 M/S DATE PRINTED: 05/04/93 NOTE: TOTALS AHD SUBTOTALS ARE OBTAIHED PROM VHROVNDED NUMBERS

Page 30 of STABILITY CLASS F { 1.5< DELTA T<~ 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 93 - MAR 31', 93 WIHD WIND SPEED(MPH)

DIRECTION 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24 ' 2 '5 TOTAL H 0.000 0.000 0.005 0.077 0.015 0.010 0.0 0.0 0.0 0.108 HNE 0.000 0.003 0.009 0.032 0.088 0.027 0.0 0.0 0.0 0.159 HE 0.000 0.002 0.015 0.0 0.008 0.0 0.0 0.0 0.0 0.025 EHE 0.000 0.0 0.003 0.009 0.0 0.0 0.0 0.0 0 ' 0.012 E 0.000 0.003 0.017 0.047 0.008 0.0 0.0 0.0 0.0 0.076 ESE 0.000 0.004 0.014 0.019 0.0 0.0 0.0 0.0 0.0 0.038 SE 0 001 0.002 0.046 0.051 0.048 0.0 0.0 0.0 0.0 0.149 SSE 0.001 0.010 0.063 0.240 0.067 0.056 0.0 0.0 0.0 0.437 S 0.001 0.003 0.048 0.035 0.010 0.167 0.0 0.0 0.0 0.264 SSW 0.001 0.010 0.017 0.019 0.0 0.0 0.0 0.0 0.0 0.047 SW 0.000 0.0 0.010 0.024 0.013 0.012 0.0 0.0 0.0 0.058 WSW 0.0 0.0 0:0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 W 0.0 0.0 0.0 0.008 0.0 0.0 0.0 0.0 0.0, 0.008 WHW 0 F 000 0.0 F 009 0.0 0.0 0.0 0.0 0.0 0.0 0.009 HW 0.000 0.0 0.003 0 '10 0.008 0.0 0.0 0.0 0.0 0.020 HHW 0.0 0.0 0.0 0.021 0.047 0.0 0.0 0.0 0 ' 0.068 SUBTOTAL- 0.006 0.038 0.260 0.592 0.312 0 '71 0.0 0.0 0.0 1.478 TOTAL HOURS OP VALID OBSERVATIONS 2065.000 TOTAL HOURS OP GROUHD LEVEL RELEASE 251.070 TOTAL HOURS OF STABILITY CLASS F 133.290 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS F 30 '30 ~

METEOROLOGICAL FACZLZTY MET FACILITY LOCATED 1.3 KM ESE OP BROWHS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AHD 45 ~ 30 METERS WIND DIRECTION MEASURED AT 10 ~ 42 METER LEVEL WIHD SPEED MEASURED AT 10.42 METER LEVEL EPPLUENT VELOCITY ~ 12.60 M/S DATE PRINTED: 05/04/93 HOTE: TOTALS AHD SUBTOTALS ARE OBTAINED PROM UNROUNDED NUMBERS

Page 31 of 6 SPLIT JOINT PER N ND SPEED BY WIND DIRECTIO OR STABILITY CLASS G { DELTA T > 4. 0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 93 MAR 31, 93 WIND 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 H 0.000 0.0 0.009 0.027 0.018 0.0 0.0 0.0 0.0 0.054 HNE 0.000 0.0. 0.004 0.018 0.007 0.0 0.0 0.0 0.0 0.030 HE 0.000 0.007 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.007 EHE 0.000 0.004 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.004 E 0.000 0.0 0.013 0.003 0.0 0.0 0.0 0.0 0.0 0.016 ESE 0.000 0.000 0.004 0.0 0.0 0.0 0.0 0.0 0 ' 0.005 SE 0.000 0.006 0.002 0.030 0.0 0.0 0.0 0.0 0.0 0.038 SSE 0.001 0.013 0.089 0.080 0.0 0.0 0.0 0.0 0.0 0.184 S 0.000 0 ~ 0 0.010 0.0 0.0 0.0 0.0 0.0 0.0 0.010 SSW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SW 0.000 0.002 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.002 WSW 0 ' 0.0 0.0 0.007 0.0 0.0 0.0 0.0 0.0 0.007 W 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 WHW 0.000 0.0 0.003 0.0 0.0 0.0 0.0 0.0 0.0 0.003 HW 0.000 0.0 0.014 0.012 0.0 0.0 0.0 0.0 0.0 0.026 HHW 0.000 0 ~ 0 0.011 0.034 0.0 0.0 0.0 0.0 0.0 0.045 SUBTOTAL 0.002 0.033 0.160 0.213 0.025 0.0 0.0 0.0 0.0 0.432 TOTAL HOURS OF VALID OBSERVATIONS 2065.000 TOTAL HOURS OF GROUND LEVEL RELEASE 251.070 TOTAL HOURS OF STABILITY CLASS G 54.280 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS G 8.930 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWHS FERRY NUCLEAR PLANT STABILITY BASED OH 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 % 12.60 M/S DATE PRINTED: 05/04/93 HOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Radiological Impact-Assessment Browns Ferry Nuclear Plant January - June 1993 Table 5B Joint Frequency Distribution in Percent for Split Level Releases Ground Level Portion Second Quarter

Page 32 Of 6 0 STABZLZTY CLASS A {DELTA T<~-1.9 C/100 M)

BROWHS FERRY NUCLEAR PLANT PART 1 OP 2 GROUND LEVEL RELEASE MODE APR 1, 93 - JUN 30, 93 WIND WIND SPEED(MPH)

DIRECTION 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 1~ .6 TOTAL H 0.000 0.000 0.000 0.000 0.005 0.069 0.000 0.000 0 ~ 000 0.074 NHE 0.000 0.000 0.000 0.000 0.000 0.090 0.000 0.000 0.000 0.090 HE 0.000 0.000 0.000 0.000 0.000 0.000 0.018 0.000 0.000 0.018 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 0.000 0.000 0.024 0.015 0.000 0.000 0.000 0.000 0.040 SE 0.000 0.000 0. 015 0.087 0.000 0.000 0.000 0.000 0.000 0.103 SSE 0.000 0.000 0.036 0.125 0.000 0.030 0.000 0.000 0 ~ 000 0.191 S* 0.000 0.000 0.021 0.163 0.114 0.023 0.000 0:000 0.000 0.322 SSW 0.000 0.000 0.004 0.041 0.000 0.000 0.000 0.000 0.000 0.045 SW 0.000 0.000 0 ~ 001 0 ~ 017 0.002 0.000 0.000 0.000 0.000 0.020 WSW 0.000 '.000 0.000 0.010 0.013 0.010 0.000 0.000 0.000 0.032 W 0.000 0.000 0 F 000 0.000 0.000 0.000 0 ~ 014 0.000 0.000 0.014 WNW o.aao o.ooa o.oao 0.000 0.004 0.000 0.000 0.000 0.000 0.004 HW 0.000 0.000 0.000 0.000 0.003 0.053 0.093 0.000 0.000 0.149 HHW 0. 00,0 0.000 0.000 0 ~ 001 0.006 0.028 0.000 0.000 0.000 0.035 SUBTOTAL 0.000 0.000 0. 078 0.469 0.162 0.303 0.125 0.000 0 ~ 000 1.138 ToThr. HoURs oF vhr,zn oBSERVATIONS 2070.000 TOTAL HOURS OF GROUND LEVEI RELEASE 188.360 TOTAL HOURS OF STABZLITY CLASS A 24.530 TOTAL HOURS OF OROUHD LEVEL STABZLITY CLASS A 23.550 METEOROLOGICAL FACILITY: BROWHS FERRY HUCLEAR PLANT STABILITY BASED OH DEITA-T BETWEEN 10 WZND DIRECTION MEASURED AT 10 '2 '3 AHD 45.30 METERS METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EPPLUENT VELOCITY ~ 12 ~ 60 M/S DATE PRINTED: 30-JUL-93 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Page 33 of 6 ENTAGE FREQUENCIES STABILITY CLASS B t-1.9< DELTA T<%-1.7 C/100 M)

BROWHS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 93 - JUN 30, 93 WIND WIND SPEEDtMPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5 '-7 ' 7.5-12.4 12.5-18.4 18.5-24.4 >%24.5 TOTAL H 0.000 0.000 0.000 0.000 0.008 0.008 0.000 0.000 0.000 0.016 HHE 0.000 0.000 0.000 0.000 0.008 0.029 0.000 0.000 0.000 0.037 HE 0.000 0.000 0.000 0.000 0.005 0.013 0.000 0.000 0.000 0.017 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE F 000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.007 0.014 0.000 0.000 0.000 0.000 0.000 0.021 SSE 0.000 0.000 0.000 0.005 0.034 0.000 0.000 0.000 0.000 0.039 S 0.000 0.000 0.011 0.009 0.030 0.086 - 0.000 0.000 0.000 0.136 SSW 0.000 0.000 0 F 000 0.002 0.000 0.000 0.000 0.000 0.000 0.002 SW 0.000 F 000 0.005 0.013 0.000 0.000 0.000 0.000 0.000 0.018 WSW 0.000 0.000 0.000 0.008 0.007 0.027 0.000 0.000 0.000 0.042 W 0.000 0.000 0.000 0.000 0.008 0. 010 0.000 0.000 0.000 0.018 WNW 0.000 0.000 0.000 0.000 0.000 0.007 0 '06 0.000 0.000 0.000 0.013 HW F 000 0.000 0.000 0.016 0.026 0.039 0.000 F 000 0.082 HHW 0.000 0.000 0.000 0.000 0.005 0.038 0.000 0.000 0.000 F 043 SUBTOTAL 0.000 0.000 0.024 0 F 051 0.132 0.243 0.039 0.000 0.000 0.489 TOTAL HOURS OF VALID OBSERVATIONS 2070.000 TOTAL HOURS OF GROUND LEVEL RELEASE 188.360 TOTAL HOURS OF STABILITY CLASS B 10.120 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS B 10.120 METEOROLOGICAL FACILZTY: BROWHS FERRY NUCLEAR PLANT STABILITY BASED OH DELTA-T BETWEEN 10 ~ 03 AHD 45 ~ 30 METERS WIND DIRECTZOH MEASURED AT 10.42 METER LEVEL WIND SPEED MEASURED AT 10 42 METER LEVEL EFFLUEHT VELOCITY % 12.60 M/S DATE PRINTED: 30-JUL-93 NOTE: TOTALS AllD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

0 STABILITY CLASS C (-1.7<

BROWNS FERRY NUCLEAR PLANT DELTA T< -1.5 C/100 M)

.Page 34 o PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 93 JUN 30, 93 WIND WIND SPEED(MPH]

DIRECTION CALM 0-6-1 ' 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 0.000 0.008 0.006 0.010 0.000 0.000 a.023 HHE 0.000 0.000 0.000 0 ~ 000 0.003 0.022 0.000 0.000 0.000 0.025 HE 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.001 EHE 0.000 0.000 0.000 0.000 0.000 0.006 0.000 0.000 0.000 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 0.005 0.000 0.000 0.000 0.000 0.000 . 0.005 SE 0.000 0.000 0.006 0.009 0.000 0.000 0.000 0.000 0.000 0.015 SSE 0.000 0 ~ 000 0.019 0.020 0.000 0.000 0.000 0.000 0.000 0.039 S 0.000 0 ~ 000 0.004 0.009 0.000 0.048 0.000 0.000 0.000 0.062 SSW 0.000 0.000 0.006 0.002 0.000 0.000 0.000 0.000 0.000 0.008 SW 0.000 0.000 0.007 0.000 0.000 0.000 0.000 0.000 0.000 0.007 WSW 0.000 0.000 0.001 0.014 0.000 0.018 0.000 0.000 0.000 0.033 W 0.000 0 000 0.000 0.009 0.007 0.017 "0.016 0.000 0.000 0.050 WHW 0.000 0.000 0.000 0.000 0 019 0.021 0. 000 0.000 0.000 0.040 HW 0.000 0.000 0.000 0.000 0.030 0.025 0.000 .0.000 0.000 0.055 HNW 0.000 0.000 0.000 0.000 0.008 0.020 0.000 0.000 0.000 0.028 SUBTOTAL 0.000 0.000 0.044 0.070 0.074 0.183 0.026 0.000 0.000 0.397 TOTAI HOURS OF VALZD OBSERVATIOHS 2070.000 TOTAL HOURS OP GROUND LEVEL RELEASE 188.360 TOTAL HOURS OF STABILITY CLASS C 21.580 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS C 8.220 METEOROLOGICAL FACILITY: BROWHS FERRY HUCLEAR PLANT STABILITY BASED OH DELTA-T BETWEEN 10 ~ 03 AHD 45.30 METERS WIND DIRECTIOH MEASURED AT 10.42 METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EFPLUEHT VELOCITY ~ 12.60 M/S DATE PRINTED: 30-JUL-93 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED PROM UNROUNDED NUMBERS

Page 35 of 6 Q IES HD SPEED BY 'WIH STABILITY CLASS D {-1.5< DELTA T<%-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OP 2 GROUND LEVEL RELEASE MODE APR 1, 93 - JUH 30, 93 WIND WIND SPEED(MPH)

DIRECTION 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 )%24.5 TOTAL H 0.000 0.000 0.000 0 ~ 023 0.060 0.159 0.000 0.000 0.000 0.243 HNE 0.000 0 F 000 0.002 0.009 0.053 0.049 0.000 0.000 0.000 0.113 HE F 000 0.000 0.000 0.016 0.041 0.033 0.000 0.000 0.000 0.089 EHE 0.000 0.000 0.000 0.011 0.009 0.014 0.000 0.000 0.000 0.034 E 0.000 0.000 0.000 0.021 0.014 0.026 0.000 0.000 0.000 0.061 ESE 0.000 0.000 0.015 0.077 0.067 0<029 0.000 0.000 0.000 0 '89 SE 0.000 0.000 0 '69 0.080 0.000 0.000 0.000 0.000 0.000 0.149 SSE 0.000 0.000 0.061 0.071 0.000 0.044 0.000 0.000 0.000 0.176 S 0.000 0.001 0.065 0.078 0.197 0.146 0.000 0.000 0.000 0.487 SSW 0.000 0.000 0.052, 0.111 0.000 F 000 0.000 0.000 0.000 0.163 SW 0.000 0.000 0 '13 0.031 0.024 0.032 0.000 0.000 0.000 0.100 WSW 0.000

.0.000 0.000 0.019 0.041 0.021 0.199 0 '59 0.000 0.000 0.338 W 0 F 000 0.002 0.021 0.040 0.118 0.042 0.000 0.000 0.223 WNW 0.000 0.000 0.000 0.007 0.029 0.092'.112 0.111 0.000 0.000 0.239 HW 0.000 0.000 0.000 0.008 0.045 0.107 0.000 0.000 0.271 HNW 0.000 0.000 0.000 0.013 0.016 0.119 0.048 0.000 0.000 0.196 SUBTOTAL 0.000 0 F 001 0.298 0.618 0.615 1.172 0.368 0.000 0.000 3.072 TOTAL HOURS OF VALID OBSERVATIOHS 2070 000 F

TOTAL HOURS OF GROUND LEVEL RELEASE 188.360 TOTAL HOURS OF STABILITY CLASS D 1183.210 TOTAL HOURS OF QROVHD LEVEL STABILITT CLASS D 63.600 METEOROLOGICAL FACILITY: BROWHS PERRY HVCLEAR PLANT STABZLZTT BASED OH DELTA-T BETWEEH 10.03 AHD 45.30 METERS WIND DZRECTION MEASURED AT 10.42 METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EPPLUENT VELOCITY % 12.60 M/S DATE PRINTED: 30-JUL-93 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED l'ROM UNROUNDED NUMBERS

Page 36 of STAB1I ITY CLASS E (-0. 5 < DELTA T<~ 1. 5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 93 JUH 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 ' 18.5-24.4 >~24.5 TOTAL H 0.000 0.002 0 ~ 015 0.049 0.014 0.000 0.000 0 ~ 000 0.000 0.080 HHE 0.000 0.000 0.006 0.046 0.048 0.009 0.000 0.000 0.000 0.109 HE a.oao o.oao 0.004 0.014 0.042 0.016 0.000 0.000 0.000 0.077 ENE 0.000 0.000 0.018 0.010 0.008 0.000 0.000 0.000 0.000 0.037 E . 0;000 0.003 0.044 0.058 0.006 0.018 0.000 0.000 0.000 0.129 ESE 0.000 0.002 0.109 0.102 0 '46 0.019 0.000 0.000 0.000 0.279 SE 0.000 0.009 0.058 0.066 0.014 0.023 0.000 0.000 0.000 0.171 SSE 0.000 0 ~ 019 0.066 0.052 0.398 0.094 0.000 0.000 0.000 0.629 S 0.000 0.020 0.086 0.105 0.224 0.320 0.000 0.000 0.000 0.755 SSW 0.000 0.008 0.062 0.018 0.000 0.000 0.000 0.000 0.000 0.088 SW 0.000 0.001 0.006 0.000 0.000 0.000 0.000 0.000 0.000 0.007 WSW 0.000 0.000 0.039 0.020 0.000 0.000 0 ~ 000 0.000 0.000 0.059 W 0.000 0.000 0.014 0.004 0.008 0.000 0.000 0.000 0.000 0.027 WHW 0.000 0.000 0.000 0.006 0.000 o.oao o.oao 0.000 0.000 0.006 HW 0.000 0.000 0.000 0.024 0.010 0.015 0.000 0.000 0.000 0.049 HHW 0.000 0.000 0.001 0.025 0.051 0.010 0.000 0.000 0.000 0.086 SUBTOTAL 0.001 0.063 0.529 0.600 0.869 0.524 0.000 0.000 0.000 2.586 TOTAL HOURS OF VALID OBSERVATIONS 2070.000 TOTAL HOURS OF GROUND LEVEL RELEASE 188.360 TOTAL HOURS OF STABZIITY CLASS E 647.330 TOTAL HOURS OP GROUND LEVEL STABILITY CIASS E 53.540 METEOROLOGICAL PACZLZTY: BROWHS FERRY HUCLEAR PLANT STABILITY BASED OH DELTA-T BETWEEN 10 ~ 03 AHD 45.30 METERS WZHD DIRECTIOH MEASURED AT 10.42 METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRZNTED: 30-JUL-93 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED PROM UNROUNDED NUMBERS

Page 37 of 6 INT PERCENTAGE FREQUEN IE STABILITY CLASS F ( 1.5< DELTA T<~ 4.0 C/100 M)

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

DIRECTION 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 )%24.5 TOTAI H 0.002 0.001 0.042 0.026 0.008 0.000 0.000 0.000 0.000 0.079 HNE 0.001 0.005 0.009 0.017 0.000 0.000 0.000 0.000 0.000 0.032 HE 0 F 000 0.003 0.007 0.024 0.007 0.000 0.000 0.000 0.000 0.041 ENE 0.001 0.009 0.021 0.068 0.000 0.000 0.000 0.000 0.000 0.099 E 0 F 001 0.007 0.029 0.007 0.000 0.000 0.000 0.000 0.000 0.043 ESE 0.003 0.024 0.040 0.023 0.000 0.000 0.000 0.000 0.000 0.089 SE 0.003 0.022 0.058 0.015 0.000 0.000 0.000 0.000 0.000 0.098 SSE 0.005 0.032 0.103 0.088 0.125 0.000 0.000 0.000 0.000 0.354 S 0.002 0.014 0.039 0.055 0.132 0.000 0.000 0.000 0.000 F 242 SSW 0.000 0.005 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.006 SW 0.000 0.000 0.000 F 000 0.000 0.000 0.000 0.000 0.000 0.000 WSW 0.000 0.000 0.000 0.000 F 000 0.000 0.000 0.000 0.000 0.000 W 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.004 WHW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 HW 0.000 0.000 0.000 0.000 0.000 0.008 0.000 0.000 0.000 0.008 HHW 0.000 0.000 0.003 0.028 0.008 0.009 0.000 0.000 0.000 0.047 SUBTOTAL 0. 019 0.124 0.351 0.351 0.281 0.017 0.000 0.000 0.000 1.143 TOTAL HOURS OF VALID OBSERVATIOHS 2070.000 TOTAL HOURS OF GROUND LEVEL RELEASE 188.360 TOTAL HOURS OF STABILITY CLASS F 162.010 TOTAL HOURS OF OROUHD LEVEL STABILITY CLASS F 23.650 METEOROLOGICAL FACILITY! BROWHS FERRY NUCLEAR PLANT STABILITY BASED OH DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTIOH MEASURED AT 10.42 METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EFFLUEHT VEZOCZTY I 12.60 M/S DATE PRINTED: 30-JUL-93 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Page 38 of 6 SPLIT JOINT PERCENTAGE FREQUENCIES HD SPEED BY WIND DIRECTION 'FOR STABILITY CLASS G [DELTA T > 4.0 C/100 M)

BROWNS PERRY NUCLEAR PLANT PART 1 OP 2 GROUND LEVEL REZEASE MODE APR 1, 93 .JVH 30, 93 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.3 3 '-5.4 5.5-7.4 7 '-12.4 12.5-18.4 18.5-24.4 >>24.5 TOTAL H 0.004 0.000 0.023 0.008 0.000 0 ~ 000 0.000 0.000 0.000 0.034 HHE 0.001 0.001 0 F 002 0.066 o.aoB 0.000 0.000 0.000 0.000 0.078 NE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ENE 0.002 0.000 0.011 0.005 0.000 0.000 0.000 0 ~ 000 0.000 0.018 E 0.001 0.006 0.002 0.002 0.000 0.000 0.000 0.000 0.000 0.011 ESE 0 ~ 005 0.031 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.036 SE 0.001 0.000 0.008 0.010 0.000 0.000 0.000 0.000 0.000 0.019 SSE 0.006 0.013 0.024 0.022 0.000 0.000 0.000 0.000 0.000 0.065 S 0.001 0.000 0.008 0.000 0.000 0.000 0.000 0.000 0.000 0.009 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 o.ooa o.aao 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 HW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 HNW 0.001 0.000 0.003 0.000 0.000 0.000 0 ~ 000 0.000 0.000 0.004 SUBTOTAL 0.020 0.052 0.082 0.113 0.008 0.000 0.000 0 ~ 000 0.274 TOTAL HOURS OF VALID OBSERVATIONS 2070.000 TOTAL HOURS OP GROUND LEVEL RELEASE 188.360 TOTAL HOURS OF STABILITY CLASS G 21.220 TOTAL HOURS OP GROUHD LEVEL STABILITY CLASS G 5.680 METEOROLOGICAL PACZLITY: BROWHS FERRY HUCLEAR PLANT STABILITY BASED OH DELTA-T BETWEEN 10 ~ 03 AHD 45. 30 METERS WIND DIRECTION MEASURED AT 10 ~ 42 METER LEVEL WIND SPEED MEASURED AT 10 '2 EFFLUEHT VELOCITY ~ 12.60 M/S METER LEVEL DATE PRINTED: 30-JVL-93 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED HVMBERS

Radiological Impact Assessment

~

Browns Ferry Nuclear Plant January - June 1993 Table 5E Joint Frequency Distribution in Percent for Split Level Releases Elevated Level Portion First Quarter

Page 39 of 6 SPIIT JOINT PERCENTAGE FREQUENCIE IHD SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<~-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 Ot 2 EIEVATED RELEASE MODE JAH 1, 93 MAR 31, 93 WIND DIRECTION 0 '-1.4 '.5-3 ' WIND SPEED(MPH) 3.5-5.4 5.5-3.4 7.5-12.4 12 '-18.4 16.5-24.4 34.5 TOTAL H 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 HHE 0.0 0.0 0.0 0.0 0.0 0.0 0 ~ 0 0.0 0.0 0.0 HE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ENE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0. 0.0 0.0 E 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0' 0.0 0.0 ESE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0~0 SSE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 S 0.0 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SSW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 WSW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 W 0.0 0.0 0.0 . 0.0 0.0 0.0 0.0 0.0 0.0 0.0 WHW 0.0 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 HW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 HHW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SUBTOTAL 0.0 0.0 0.0 0 ~ 0 0.0 0.0 0.0 0.0 0.0 0.0 TOTAL HOURS OF VALID OBSERVATIONS 2065.000 TOTAL HOURS Ot ELEVATED RELEASES 1$ 13.929 TOTAL HOURS Ot STABZLZTY CLASS A 6.750 TOTAL HOURS OF ELEVATED STABILITY CLASS A 0.0 METEOROLOGICAL FACILITY MET FACILITY LOCATED 1 ~ 3 KM ESE Ot BROWHS FERRY NUCLEAR PLANT STABILITY BASED OH DELTA-T BETWEEN 45.30 AHD 69 ~ 59 METERS WZHD DIRECTION MEASURED AT 45.67 METER LEVEL WIND SPEED MEASURED AT 45.67 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRZHTED: 05/04/93 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED tRON UNROUNDED HUMBERS

0 0

Page 40 of ~6 IT JOINT PERCENTAGE FREQUEH IE STABILITY CLASS B {-1. 9 < DELTA T<~-1. 7 C/100 M)

BROWNS FERRY NUCLEAR PIANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 93 - MAR 31, 93 WIND WIND SPEED(MPH)

DIRECTION 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7. 5-12. 4 12.5-18. 4 18. 5-24 ~ 4 >i24.5 TOTAL H 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 HHE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NE 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 EHE 0.0 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 0 ~ 0 0.0 E 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ESE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SE 0.0 0.0 0.0 0.048 0.0 0.0 0 ' 0.0 0.0 0.048 SSE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 S 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SSW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SW 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 WSW 0.0 0.0 0.0 0.0 0 ' 0.0 0.0 0.0 0.0 0.0 W 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 WHW 0.0 0.0 0.0 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 NW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 HHW 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SUBTOTAL 0.0 0.0 0.0 0.048 0.0 0.0 0.0 0.0 0.0 0.048 TOTAL HOURS OF VALID OBSERVATIONS 2065.000 TOTAL HOURS OF ELEVATED RELEASES 1813.929 TOTAL HOURS OF STABILITY CLASS B 9.140 TOTAL HOURS OF ELEVATED STABILITY CLASS B 1.000 METEOROLOGZCAL FACZIITY: MET FACILITY LOCATED 1 ~ 3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED OH DELTA-T BETWEEN 45 30 AHD 89 WIND DIRECTZOH MEASURED AT 45.67 METER LEVEL

'9 METERS WIND SPEED MEASURED AT 45.67 METER LEVEL EFFLUEHT VELOCITY ~ 12.60 M/S DATE PRINTED: 05/04/93 NOTE: TOTALS AHD SUBTOTAIS ARE OBTAINED FROM UNROUNDED NUMBERS

0 Page 41 of SPLIT JOINT PERCENTAGE FREQUEHCIE IHD SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA T<~-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 93 - MAR 31, 93 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5 ' 5.5-7.4 7.5-12.4 12.5-18.4 lb.5-24.4 >~24.5 TOTAL N 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NHE 0.0 0.0 '0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 HE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 EllE 0.0 0 ~ 0 0.0 0.0 0.0 0.0 0.0 0 ' 0.0 0.0 E 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ESE 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SE 0.0 0.0 0.0 0.0 97 0.0 0.0 0.0 0.0 0.0 0.097 SSE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 S 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SSW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SW 0.0 0.0 0.0 0.0 0.0 0' 0.0 0 ' 0.0 0.048 WSW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 W 0.0 0.0 0.0 0.0 0.0 0.0 0.040 0 ~ 0 0.0 0.040 WHW 0.0 0.0 0.0 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 HW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NHW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 j

SUBTOTAL 0.0 0.0 0.0 0.145 0.0 0.0 0.040 0.0 0.0 0.185 TOTAL HOURS OF VALID OBSERVATIONS 2065.000 TOTAL HOURS OF ELEVATED RELEASES 1813.929 TOTAL HOURS OF STABILITY CLASS C 16.390 TOTAL HOURS OF ELEVhTED STABILITY CLASS C 3.830 METEOROLOGICAL FACILITY: MET FACZIZTY LOCATED 1.3 KM ESE OF BROWHS FERRY NUCLEAR PLANT STABZLZTY BASED OH DELTA-T BETWEEN 45 30 AHD 89.59 METERS WIND DZRECTION MEASURED AT 45.67 METER LEVEL WIND SPEED MEASURED AT 45.67 METER LEVEL EFFLUEHT VELOCZTY ~ 12 '0 M/S DATE PRINTED: 05/04/93 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Page 42 of 6 SPLIT JOINT PERCENTAGE FREQUENCI IHD SPEED BY WIND DIRECTIOH FOR STABZLZTY CLASS D (-1.5< DELTA T<~-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 93 MAR 31, 93 WIND WIND SPEEDlMPH)

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 3 ~ .5 TOTAL N 0.0 0.0 0.097 0.436 0.692 2.481 1.107 0.135 0.0 4 ~ 947 NNE 0.0 0.0 0.145 1.211 1.301 3.475 2.050 0.070 0.0 8.252 HE 0.0 0.0 0.339 0.533 1.29$ 1.719 0.040 0.0 0.0 3.928 ENE 0.0 0.048 0.097 0.533 0.748 0.478 0.0 0.0 0.0 1.905 E 0.0 0.048 0.194 0.387 0.235 0.640 0.0 0.0 0.0 1.505 ESE 0.0 0.0 0.339 0.630 1.162 1.825 0.359 0.0 0.0 4.314 SE 0.0 0.048 0.533 0.484 0.564 1.831 1.966 0.384 0.043 5.852 SSE 0.0 0.0 0.048 0.242 0.372 1.017 0.706 0.469 0.0 2.854 S 0.0 0.0 0.0 0.145 0.138 0.421 0.432 0.109 0.003 1.250 SSW 0.0 0.0 0.04$ 0.194 0.047 0.257 0.236 0.042 0.021 0.846 SW 0.0 0.0 0.04$ 0.291 0.093 0.042 0.119 0.129 0.005 0.727 WSW 0.0 0.0 0.097 0.484 0.094 0.169 0.590 0.087 0 '03 1.523 W 0.0 0.0 0.194 0.242 0.279 1.272 1.501 0.038 0.0 3.526 WNW 0.0 0.0 0.0 0.581 0.934 1.778 2.007 0.363 0.0 5.662 NW 0 ' 0.0 0.0 0.581 0.418 1.185 1.190 0.142 0.004 3.521 HNW 0.0 0.0 0.048 0.339 0.327 1.767 1.066 0.044 0.0 3.591 SUBTOTAL 0.0 0.145 2.228 7.312 8;705 20.356 13.369 2.011 0.079 54.204 TOTAL HOURS OF VALID OBSERVATZOHS 2065.000 TOTAL HOURS OF ELEVATED RELEASES 1813.929 TOTAL HOURS OF STABILITY CLASS D 1219.230 TOTAL HOURS OF ELEVATED STABILITY CLASS D 1119.330 METEOROLOGICAL FACZLITY: MET FACZIZTY IOCATED 1.3 KM ESE OF BROWHS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AHD 89 ~ 59 METERS WIND DIRECTION MEASURED AT 45.67 METER LEVEL WZND SPEED MEASURED AT 45.67 METER LEVEL EFFLUEHT VELOCITY ~ 12.60 M/S DATE PRINTED: 05/04/93 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED FROM UHROUNDED NUMBERS

Page 43 of SPLIT JOINT PERCENTAGE FREQUENCZ IND SPEED BY WZHD DIRECTZOH FOR STABZLZTY CLASS E (-0.5< DELTA T<~ 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 93 MAR 31, 93 WIND WIHD SPEED(MPH)

DIRECTION 0.6-1.4 1.5-3.4 3.5-5.4 5 '-7.4 7.5-12.4 12.5-18 ' 18.5-24.4 >~24.5 TOTAL H 0.002 0.048 0.0 0.145 0.371 1. 067 0.157 0.0 0.0 1.790 HNE 0.003 0.0 0.097 0.339 0.185 1.989 0.753 0.0 0.0 3.365 HE 0.003 0.048 0.048 0.194 0.143 0.388 0.0 0.0 0.0 0.825 ENE 0.002 0.048 0.0 0.194 0.230 0.472 0.0 0.0 0.0 0.945 E 0.006 0.048 0.145 0.048 0.511 0.518 0.0 0 ~0 0.0 1.277 ESE 0.003 0 0 0.097 0.291 0.833 1.288 0.039 0.0 0.0 2.551 SE 0.012 0.048 0.339 0.630 0.603 1.775 0.869 0.096 0.0 4.373 SSE 0.005 0.0 0.145 0.097 0.329 0.640 0.824 0.235 0.0 2 274 S 0.003 0.0 0.097 0.145 0.091 0.594 0.040 0.057 0.010 1.037 SSW 0.002 0.0 0.048 0.145 0.045 0.169 0.160 0.0 0 ~ 006 0.576 SW 0.002 0.0 0.048 0.242 0.280 0.299 0.079 0.170 0.0 1 ~ 121 WSW 0.002 0.0 0.048 0.436 0.379 0.678 O.OBO 0.056 0.0 1.679 W 0 ~ 002 0.0 0.048 0.291 0.277 0.523 0.079 0 ' 0 ' 1.219 WHW , 0.0 0.0 0.0 0.242 0.091 0.422 0.119 0.034 0.0 0.908 HW 0.002 0.002 0.048 0.048 0.0 0.0 0.194 0.048 0.233 0.280 0.847 0.386 0 ~ 120 0.0 0.0 1 '43 NHW 0.080 0.0 0.0 0.846 SUBTOTAL 0.048 0.339 1.162 3.680 4.880 12.056 3.400 0.648 0.016 26.230 TOTAL HOURS OF VALID OBSERVATIONS 2065.000 TOTAL HOURS OF ELEVATED RELEASES 1813.929 TOTAL HOURS OF STABILITY CLASS E 623.920 TOTAL HOURS OF ELEVATED STABILITY CLASS E 541.660 METEOROLOGICAL FACZZZTY: MET FACILITY LOCATED 1.3 KM ESE OF BROWHS FERRY NUCLEAR PLAHT STABILITY BASED ON DELTA-T BETWEEN 45 '0 WIHD DIRECTION MEASURED AT 45 ~ 67 METER LEVEL AHD 89 '9 METERS WIND SPEED MEASURED AT 45 '7 EFFLUENT VELOCITY ~ 12.60 M/S METER LEVEL DATE PRINTED: 05/04/93 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UHROUHDED HUMBERS

Page 44 of 6 IT INT PERCENTACE FRE U STABILZTY CLASS F t 1. 5 < DELTA T<~ 4. 0 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 93 MAR 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 0.0 0.0 0.0 0.097 0.0 0.082 0.0 0.0 0.0 0. 179 HHE 0.0 0.0 0.0 0.048 0.046 0.130 0.0 0.0 0.0 0.224 HE 0.0 0.0 0.0 0.097 0.0 0,. 044 0.0 0.0 0.0 0.140 ENE 0 ~ 018 0.0 0.194 0.242 0.185 0.090 0.0 0 ' 0.0 0.728 E 0.0 0~0 0.0 0.097 0.045 0.260 0.040 0.0 0.0 0 F 442 ESE 0.004 0.0 0 ~ 048 0 ~ 145 0.234 0. 303. 0.0 0.0 0.0 0.735 SE 0.004 0.0 0.048 0.145 0.046 0.088 0.0 0.0 0.0 0.332 SSE 0.0 0 ~ 0 0.0 0.048 0.281 0.0 0.079 0.0 0.0 0.408 S 0.0 0.0 0.0 0.097 0.095 0.0 0.040 0.0 0.0 0.231 SSW 0.0 0.0 0.0 0.048 0.048 0.0 0.0 0.0 0.0 0.097 SW 0.0 0.0 0.0 o.o48 0.047 0.043 0.0 0.0 0.0 0.138 WSW 0.009 0.048 0.048 0.0 0.142 0.0 0.0 0.0 0.0 0.248 W 0.0 0.0 0.0 0 ~ 097 0.045 0.044 0 ' 0.0 0.0 0.186 WHW 0.004 0.0 0 ~ 048 0.048 0.138 0.0 0.0 0.0 0.0 0.239 HW 0.009 0.0 0.097 0.0 0.232 0.044 0.0 0.0 0.0 0.382 HllW 0.0 0 ' 0.0 0.048 0.046 0.172 0.0 0.0 0.0 0.266 SUBTOTAL 0.048 0.048 0.484 1.308 1.629 1.300 0.159 0.0 0.0 4.976 TOTAL HOURS OF VALID OBSERVATIONS 2065.000 TOTAL HOURS OF ELEVATED RELEASES 1813.929 TOTAL HOURS OF STABILITY CLASS F 133.290 TOTAL HOURS OF ELEVATED STABILITY CLASS F 102.760 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWHS FERRY HUCLEAR PLANT STABILITY BASED OH DELTA-T BETWEEN 45 WIND DIRECTION MEASURED AT 45.67 METER LEVEL

'0 AHD 89 '9 METERS WZHD SPEED MEASURED AT 45.67 METER LEVEL EFFLUENT VELOCITY ~ 12 '0 M/S DATE PRINTED: 05/04/93 NOTE: TOTALS'HD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

e Page 45 o SPLIT JOINT PERCENTAGE FREQUENCZE ND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY HUCIEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 93 - MAR 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 H 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 HHE 0.0 0.0 0.0 0.048 0.0 0.0 0.0 0.0 0.0 0.048 NE 0.0 0.0 0.048 0.0 0.0 0.0 0.0 0.0 0.0 0.048 EHE 0.0 0.048 0.0 0.048 0.046 0.0 0.0 0.0 0.0 0.143 E 0.0 0.048 0.097 0.0 0.0 0.0 0.0 0.0 0.0 0.145 ESE 0.0 0.0 0.291 0.291 0.047 0.043 0.0 0.0 0.0 0.671 SE 0.0 0.0 0.097 0.097 0.190 0.044 0.0 0.0 0.0 0.428 SSE 0.0 0.0 0.0 0.194 0.048 0.0 0.0 0.0 0.0 0.242 S 0.0 0.0 0.048 0.0 0.0 0.0 0.0 0.0 0.094 0.0 0 '

0.0 0.0 0.0 0.0 0 '43 SSW 0.0 0.0 0.0 0.0 SW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 WSW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 W 0.0 0.0 0.0 0.048 0.095 0.0 0.0 0.0 0.0 0.143 WNW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NW 0.0 0.0 0.048 0.0 0.046 0.0 0.0 0.0 0.0 0 '94 NHW 0.0 0 0.0 0.048 0.0 0.041 0.0 0.0 0.0 0 '90 SUBTOTAL 0.0 0.145 0.581 0.775 0.567 0.128 0.0 0.0 0.0 2.196 TOTAL HOURS OF VALID OBSERVATIOHS 2065.000 TOTAL HOURS OF ELEVATED RELEASES 1813.929 TOTAL HOURS OF STABILITY CLASS 0 54.280 TOTAL HOURS OF ELEVATED STABILITY CLASS G 45.350 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED OH DELTA-T BETWEEN 45.30 AHD 89.59 METERS WIHD DZRECTZOH MEASURED AT 45.67 METER LEVEL WIHD SPEED MEASURED AT 45.67 METER LEVEL EFFLUENT VEIOCITY ~ 12.60 M/S DATE PRINTED: 05/04/93 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Radiological Impact Assessment Browns Ferry Nuclear Plant January - June 1993 Table 5F Joint Frequency Distribution in Percent for Split Level Releases Elevated Level Portion Second Quarter

Page 46 of SPLIT JOINT PERCENTAGE FREQUENCZE IND SPEED BY WIND DIRECTION FOR STABZLITY CLASS A l DELTA T<~-1 9 C/100 M)

~

BROWHS PERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 93 JUN 30, 93 WIND WIND SPEED(MPH)

DIRECTION 0.6-1.4 1.5-3.4 3.5<<5.4 5.5-7.4 7. 5-12. 4 12. 5-18. 4 18. 5-24. 4 >e24.5 TOTAL N 0.000 0.000 0.000 0.000 0.000 0.000 0 ~ 000 0.000 0.000 0.000 HHE 0.000 0.000 0.000 0.000 0.000 a.aoa 0.000 0.000 O.oaa 0.000 HE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 ~ 000 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 o.ooa 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 a.ooo 0.000 0 ~ 000 0.000 0.000 D.aoa D.aao 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 O.OOD O.ODO 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.aoa 0.000 0.000 0.000 SW 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 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 o.ooa WHW 0.000 0.000 0.000 0.000 0 000 0.000 0.000 0.000 0.000 0.000 HW 0.000 0.000 0.000 0.000 o.aoo 0.000 0.000 0.000 0.000 0.000 HHW 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 0.047 0.000 0.000 O.ooa 0.000 0. 04'7 TOTAL HOURS OP VALID OBSERVATZOHS 2070.000 TOTAL HOURS OP ELEVATED RELEASES 1881 '40 TOTAL HOURS OF STABILITY CLASS A 24.530 TOTAL HOURS OF ELEVATED STABILITY CLASS A 0.980 METEOROLOGICAL FACILITY BROWHS FERRY NUCLEAR PLANT STABILITY BASED OH DELTA-T BETWEEH 45.30 AHD 89.59 METERS WIHD DIRECTION MEASURED AT 45 ~ 67 METER LEVEL WIHD SPEED MEASURED AT 45.67 METER LEVEL EPFLUENT VELOCITY ~ 12.60 M/S DhTE PRZHTEDt 30-JUL-93 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Page 47 o SPIIT JOINT PERCENTAGE PREQUENCIE HD SPEED BY WIND DIRECTIOlf FOR STABILITY CLASS B (-1. 9 < DELTA T<~-1. 7 C/100 M)

BROWHS PERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR le 93 JUH 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 H 0.000 0.000 0.000 Q.aaa a.ooo 0.000 0.000 0.000 0.000 0.000 HHE 0.000 0.000 0 F 000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 HE 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 a.aoa 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 O.QOO a.aoo o.ooa 0.000 0.000 0.000 0.000 O.DOO 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 O.DOO 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 O.OQO O.oaa 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 a.ooo 0.000 0.000 0.000 '0.000 WHW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 HW 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 0.000 a.ooa 0 ~ 000 TOTAL HOURS OF VALID OBSERVATIONS 2070.000 TOTAL HOURS OF ELEVATED RELEASES 1881.640 TOTAL HOURS OP STABILITY CLASS B 10.120 TOTAI HOURS OP ELEVATED STABILITY CLASS B 0.000 METEOROLOGICAL PACILZTY: BROWHS PERRY NUCLEAR PLANT STABILITY BASED OH DELTA-T BETWEEN 45 '0 WIND DIRECTION MEASURED AT 45.67 METER LEVEL AHD 89.59 METERS WIND SPEED MEASURED AT 45.67 METER LEVEL EPFLUENT VELOCITY ~ 12 60 M/S DATE PRINTED: 30-JUL-93 NOTE TO'TALS AHD SUBTOTALS ARE OBTAINED PROM UNROUNDED NUMBERS

Page 48 of 6 ~ ~

SPLIT JOINT PERCENTAGE FREQUENCIES HD SPEED BY WIND DIRECTZON FOR STABILITY CLASS C (-1.7< DELTA T<%-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 93 JUH 30, 93 WZHD WIND SPEED(MPH)

DIRECTION CALM 6.6-3.6 1.5-3.4 3.5-5. ~ 5.5-'3. ~ 7.5-12.4 12.5-18 4 18.5-24.4 >%24.5 TOTAL H 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 HHE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 HE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 EHE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 F 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 F 000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.048 S 0,. 000 0 F 000 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.048 SSW 0.000 0.000 0.048 0.097 0.000 0.045 0.000 0.000 0.000 0.190 SW 0.000 0.000 0.000 0.000 0.143 0.130 0.000 0.000 0.000 0.273 WSW 0.000 0.000 0.000 0.000 0 '47 0.000 0.039 0.000 0.000 0.086 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WHW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 F 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 HHW 0.000 0.000 0.000 0.000 F 000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.097 0.145 0.189 0.175 0.039 0.000 0.000 0.645 TOTAL HOURS OF VALID OBSERVATIONS 2070.000 TOTAL HOURS OF ELEVATED RELEASES 1881.640 TOTAL HOURS OF STABILITY CLASS C 21.580 TOTAL HOURS OF ELEVATED STABILITY CLASS C 13.360 METEOROIOGICAL FACZLZTY: BROWNS FERRY NUCLEAR PLANT STABILITY BASED OH DELTA-T BETWEEN 45.30 AND 89.59 METERS WIND DZRECTIOH MEASURED AT 45 ~ 67 METER LEVEL WIND SPEED MEASURED AT 45 67 METER LEVEL EFFLUEHT VELOCITY % 12.60 M/S DATE PRINTED: 30-JUL-93 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

J Cl

Page 49 Of 6 SPLIT JOINT PERCENTAGE FREQUEHCIE ZHD SPEED BY WIND DIRECTION FOR STABILITY CLASS D (-1.5< DELTA T<55-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 93 JUN 30, 93 WZND 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 0.001 0.048 0.048 0.242 0.321 1.138 0.558 0.000 0.000 2.356 NHE 0.002 0.000 0.242 0.290 0.417 1.434 0.514 0.000 O.OGO 2.898 NE 0.002 0.000 0.242 0.290 0.371 0.556 0.000 0.000 0.000 1.459 ENE 0.002 0.000 0.242 F 242 0.374 0.345 0.000 0.000 0.000 1.204 E 0.002 0.000 0.242 0.386 0.331 0.085 0.119 0.000 0.000 1.165 ESE 0.004 0.097 0.435 0.676 0.792 1. 189 0.000 0.000 0.000 3.192 SE 0.009 0.048 1.256 1.884 1.119 1.274 0.390 0.098 0.012 6.090 SSE 0.006 0.000 0.918 0.435 0.919 1.576 0.947 0.261 0.028 5.090 S 0.006 0.000 0.821 1.014 0.700 1.222 1.414 0.769 0.050 5.995 SSW 0.003 0.000 0.435 0.870 0 '46 1.364 0.510 0.177 0.000 4.104 SW 0 ~ 004 0.097 0.531 0.$ 70 1,. 070 '.639 0.435 0.099 0.000 3.745 WSW 0.003 0.000 0.435 1.014 0 ~ 609 0.511 0 ~ 509 0.134 o.ooe 3.224 W 0.002 0.000 0.338 1.063 o.ee6 0.590 0.510 0.168 0.000 3 '57 WHW 0.001 0.000 0.193 0.773 0.791 0.786 0.277 0.072 0.000 2.894 HW 0.OO2 0.000 0. 242 0.531 0.415 1.496 1 ~ 019 0.210 0.000 3.915 HHW 0.002 0.097 0.145 0.483 0.798 1.092 0.552 0.034 0.000 3.201 SUBTOTAL 0.048 0.386 6.763 11.063 10.65$ 15.296 7.753 2.022 0.097 54.087 TOTAL HOURS OF VALID OBSERVATIONS 2070.000 TOTAL HOURS OF ELEVATED RELEASES 1881.640 TOTAL HOURS OF STABILITY CLASS D 1183.210 TOTAL HOURS OF ELEVATED STABILITY CLASS D 1119.610 METEOROLOGICAL FACILITY: BROWHS FERRY NUCLEAR PLANT STABILITY BASED QH DELTA-T BETWEEN 45 30 AHD 89 . 59 METERS WIND DZRECTIOH MEASURED AT 45.67 METER LEVEL WIND SPEED MEASURED AT 45.67 METER LEVEL EFFZUEHT VELOCITY ~ 12.60 M/S DATE PRZNTED: 30-JUL-93 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

~ ~

Page 50 o SPLIT JOINT PERCENTAGE FREQUENCIES D SPEED BY WIND DIRECTION FOR STABILITY CLASS E {-0.5< DELTA TC~ 1.5 C/100 M)

BROWHS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 93 - JUN 30, 93 WIND WIND SPEED(MPH)

DIRECTION CALM 0. 6-1. ~ 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 H 0.004 0.000 0.193 0.242 0.370 0.768 0 F 040 0.000 a.aoo 1.617 HHE 0.006 0.000 0.338 0.338 0.232 0.735 0.000 0.000 0.000 1.649 HE 0.005 0.048 0.193 0.338 0.093 0.339 0.080 a.aoo 0 ~ 000 1.096 ENE 0.005 0.000 0.242 0.338 0.189 0.420 0.040 0.000 0.000 1.234 E 0.005 0.000 0.242 0.628 0.327 0.601 0.040 0.000 0.000 1.842 ESE 0.007 0.000 0.386 0.580 0.700 0.693 0.116 0.000 0.000 2.483 SE 0.017 0.193 0.725 1.353 1. 1,59 1.058 0 197 0.074 0.000 4.776 SSE 0.003 0.000 0.145 0.628 0.651 1.322 0 ~ 474 0.271 0.002 3.497 S 0 012 0.000 a.628 0.435 0.381 0.838 0.316 0.149 0.000 2.758 SSW 0.004 0.000 0.193 0.386 0.465 0.344 0.080 0.000 0.000 1. 473 SW o.ao9 0.000 0.483 0.531 0.232 0.217 0~000 0.000 0.000 1.473 WSW 0.005 0.000 0.290 0.386 0.277 0.084 0.000 0.000 0.000 1.043 W 0.005 0.097 0.193 0.386 0.095 0.044 0.000 0.000 0.000 0.821 WHW 0.005 0.000 0.290 .0. 242 0.235 0.045 0.000 0.000 0.000 0.817 HW 0.004 0.000 ~ 0.193 0.145 0.182 0 ~ 170 0.000 0.000 0.000 0.693 HNW 0.002 0.000 0.097 0.193 0.327 0.677 0.119 0.000 0.000 1 ~ 415 SUBTOTAL 0.097 0.338 4.831 7.150 5.913 8.357 1.502 0.495 0.002 28.686 TOTAL HOURS OF VALID OBSERVATIONS 2070.000 TOTAL HOURS Ot ELEVATED RELEASES 1881.640 TOTAL HOURS Ot STABILITY CLASS E 647.330 TOTAL HOURS OF ELEVATED STABZLZTY CLASS E 593.790 METEOROLOGICAL FACILITY: BROWNS tERRY 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

-EttLUEHT VELOCITY ~ 12.60 M/S DATE PRINTED: 30-JUL-93 NOTE: TOTALS AHD SUBTOThLS ARE OBThIHED FROM UNROUNDED NUMBERS

i, Page 51 o SPLZT JOINT PERCENTAGE FREQUENCIES HD SPEED BY WIND DIRECTION FOR STABILZTY CLASS F ( 1.5< DELTA T<% 4.0 C/lao M)

BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 93 - JUN 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 >%24 ~ 5 TOTAL H 0.000 0.000 0.048 0.048 0.093 0.214 0.000 0.000 0.000 0.403 NHE 0.000 0.000 0.000 0.048 0.092 0.083 0.000 0.000 0.000 0.223 HE 0.000 0.000 0.000 0.145 0.139 0.334 o.aeo 0.000 0.000 0.698 EHE 0.000 0.000 0.097 0.145 0.281 0 ~ 252 0.000 0.000 0.000 0.774 E 0.000 0 F 048 0.048 0.193 0.139 0.130 0.000 0.000 0.000 0.559 ESE 0.000 0.048 0.242 0.338 0.186 0.043 0.000 0.000 0.000 0.857 SE 0.000 0.000 0.290 0.193 0.045 0.044 0.000 0.000 0.000 0.572 SSE 0.000 o.o4e 0.097 0.290 0.188 0. 172 0.000 0.000 0.000 0.795 S 0.000 0.000 0.000 0.242 0.280 0 ~ 211 0.079 0.000 0.000 0.811 SSW 0.000 0.048 0.000 0.048 0 ~ 000 0.044 0 ~ 000 0.000 0.000 0.141 SW 0.000 0.000 0.000 0.048 0.046 0.000 0.000 0.000 0.000 0.095 WSW 0.000 0.000 0.048 0.193 0.091 0.045 0.000 0.000 0.000 0.377 W 0 ~ 000 0.097 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.145 WHW 0.000 0.000 0.000 0.048 0.048 0.000 0.040 0.000 0.000 0.136 HW 0.000 0.048 0.000 0.048 0.000 0.000 0:000 0.000 0.000 0.097 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 ~ 000 0.000 o.aoo SUBTOTAL 0.000 0.338 0.870 2.029 1.676 1.572 0.200 o.oao 0.000 6.684 TOTAL HOURS OP VALID OBSERVATIONS 2070.000 TOTAL HOURS OF ELEVATED RELEASES 1881.640 TOTAL HOURS OF STABILIT'I CLASS 162.010 TOTAL HOURS OF ELEVATED STABILITY CLASS F 138.360 METEOROLOGICAL FACILITY: BROWHS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA T BETWEEN 45 '0 WZND DIRECTION MEASURED AT 45.67 METER LEVEZ AND 89.59 METERS WIND SPEED MEASURED AT 45.67 METER LEVEL EPFLUEHT VELOCITY % 12.60 M/S DATE PRINTED: 30-JUL 93 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Page 52 Of 6 BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)

BROWNS FERRY NVCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 93 JVN 30, 93 WIND WIND SPEEDtMPH)

DIRECTZOH CALM 0.6-1.4 2.5-3.4 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 O.OOQ O.OQO 0.000 0.000 0.000 0.000 0.000 HHE 0.000 0.000 0.000 0.000 0.000 0 ~ 045 0.000 0.000 0.000 0.045 HE 0.000 0.000 0.000 0.048 0.093 0.000 0.000 0.000 D.OOO 0.142 EHE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 F 000 E 0.000 0.000 0.000 O.OOO 0.000 0.000 0.000 0.000 O.DOO O.DOO ESE 0.000 0.000 0.048 0.097 0.045 0.000 0.000 0.000 0.000 0 '90 SE O.QOO 0.000 O.OOO 0.097 0.000 0.000 0.000 0.000 0.000 0.097 SSE 0.000 0.000 0.097 0 ~ 000 0.045 0.044 0.000 0.000 0.000 0.186 S 0.000 O.OOO 0.000 0.000 O.O48 0.043 0.000 0.000 0.000 0.091 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 O.DOO 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 WHW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 HW

• 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NHW 0.000 0 ~ 000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SVBTOTAL 0.000 0.000 0.145 0.242 0.232 0 ~ 132 0.000 0.000 0.000 0.751 TOTAI HOURS OF VALID OBSERVATIONS 2070.000 TOTAL HOURS OF ELEVATED RELEASES 1881.640 TOTAL HOURS OF STABILITY CLASS G 21 F 220 TOTAL HOURS OF ELEVATED STABILITY CLASS G 15.540 METEOROLOGICAL FACILITY: BROWHS FERRY NUCLEAR PLANT STABILITY BASED OH DELTA-T BETWEEN 45.30 AHD 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: 30-JUL-93 NOTE: TOTAI,S AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Radiological Impact Assessment Browns Ferry Nuclear Plant January - June 1993 Table 6A Joint Frequency Distribution in Percent for Stack Releases First Quarter

Page 53 of JOINT PERCENTAGE FREQUENCIES OF PEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA TC~-1.9 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 93 - MAR 31, 93 WIND WIND SPEED(MPH)

DZRECTIOH 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 H 0.0 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 NHE 0.0 0.0 0.0 0.0 0.0 .0 0.0 0.0 0 ~0 0.0 HE 0.0 0.0 0.0 0.0 0.0 .0 0.,0 0.0 0.0 0.0 EHE 0.0 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 E 0.0 0.0 a.o 0.0 0.0 .0 0.0 0 ' 0.0 0.0 ESE 0.0 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 SE 0.0 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 SSE 0.0 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 S 0.0 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 SSW 0.0 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 SW 0.0 0.0 0.0 0.0 0.0 .0 0 ' 0.0 0.0 o.a WSW 0.0 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 W 0.0 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 WHW 0.0 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 HW 0.0 0.0 0.0 0.0 0.0 .0 0.0 0 ' 0 ' 0.0 HHW 0.0 0.0 0.0 0~0 0 ' .0 0.0 0.0 0.0 0.0 SUBTOTAL 0~0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2098 TOTAZ HOURS OF STABILITY CLASS A 0 TOTAL HOURS OF VALID WIND DIRECTIOH-WIND SPEED-STABILITY CLASS A 0 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY OBSERVATIONS 2091 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1 ~ 3 KM ESE OF BROWHS FERRY HUCZ EAR PZAHT STABILITY BASED OH LAPSE RATE MEASURED BETWEEH 45 '0 WIND SPEED AND DIRECTION MEASURED AT THE 92.63 METER LEVEL AHD 89.59 METERS DATE PRINTED: 05/04/93 MEAN WIND SPEED ~ 0.0 MPH NOTE: TOTALS AHD SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

i Page 54 of JOINT PERCENTAGE FREQUENCIES OF PEED BY WIND DZRECTZOH FOR STABILITY CLASS B (-1.9< DELTA-T<~-1.7 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 93 - MAR 31, 93 WIND 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 H 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 HHE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 EHE 0.0 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 E 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ESE 0.0 0.0 0.0 0.048 0.0 0.0 0.0 0.0 0.0 0.048 SE 0.0 0.0 0.0 0.0 0.0 0.0 0. 0. 0.0 0.0 0.0 SSE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 S 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 ' 0.0 0.0 SSW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 '

WSW 0.0 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.'0 W 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 WNW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NW 0.0 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 HNW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SUBTOTAL 0.0 0.0 0.0 0.048 0 ' 0.0 0.0 0.0 0.0 0.048 TOTAL HOURS OF VALID STABZLITY OBSERVATIONS 2098 TOTAL HOURS OF STABILITY CLASS B 1 TOTAL HOURS OF VALID WZHD DIRECTION-WIND SPEED-STABILITY CLASS B 1 TOTAL HOURS OF VALID WZHD DIRECTION-WIND SPEED-STABZLITY OBSERVATIONS 2091 TOTAL HOURS CALM 0 METEOROLOGICAL FACILZTY: MET FACILITY LOCATED 1 ~ 3 KM ESE OF BROWHS FERRY NUCLEAR PLANT STABILITY BASED OH LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AHD DIRECTION MEASURED AT THE 92.63 METER LEVEL DATE PRINTED: 05/04/93 MEAH WIND SPEED ~ 5.3 MPH HOTE: TOTALS AHD SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

Cl Page 55 o JOINT PERCENTAGE FREQUENCIES OF PEED BY WIND DIRECTION FOR STABILITY CLASS C (-1.7< DELTA-T<=-1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAH 1, 93 MAR 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 H 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 0.0 HNE 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 0.0 NE 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 0.0 ENE 0 ' 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 0.0 E 0 ' 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 0.0 ESE 0.0 0.0 0.0 0.048 .048 0.0 0.0 0.0 0.0 0.096 SE 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 0.0 SSE 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 0.0 S 0.0 0 ~ 0 0.0 0.0 .0 0.0 0.0 0.0 0.0 0.0 SSW 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 0 '

SW 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 0.0 WSW 0.0 0 ' 0.0 0.048 .0 0.0 0.0 0.0 0.0 0.048 W 0 ' 0.0 0.0 0.0 .0 0.0 0.048 0.0 0.0 0.048 WHW 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 0.0 HW 0 ' 0 ' 0.0 0.0 .0 0.0 0.0 0.0 0.0 0 '

HHW 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 0.0 SUBTOTAI 0.0 0.0 0.0 0.096 0.048 0.0 0.048 0.0 0.0 0.191 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2098 TOTAL HOURS OF STABILITY CLASS C 4 TOTAL HOURS OF VALID WIHD DIRECTION-WIND SPEED-STABILITY CLASS C 4 TOTAL HOURS OF VALID WIND DIRECTZOH-WIHD SPEED-STABILZTY OBSERVATIONS 2091 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWHS FERRY NUCLEAR PLANT STABILITY BASED OH LAPSE RATE MEASURED BETWEEH 45.30 AND 89.59 METERS WZND SPEED AND DIRECTZOH MEASURED AT THE 92.63 METER LEVEL DATE PRINTED: 05/04/93 MEAN WIND SPEED ~ 7.9 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

Page 56 of JOINT PERCENTAGE FREQUENCIES OP PEED BY WIND DIRECTION POR STABILITY CLASS D (-1. 5< DELTA-T<~-0. 5 C/100 M)

BROWNS PERRY llUCLEAR PLANT JAN 1 5 93 MAR 31 ~ 93 WIND WZHD SPEED(MPH)

DIRECTIOH 0.6-1.4 3 . 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 H 0.0 0.0 0.048 0.143 0.670 2.630 2.726 0.526 0.0 6.743 HNE 0.0 0.0 0.143 0.335 1.339 2.822 2.822 0.622 0.0 8.082 NE 0.0 0.0 0.096 0.478 0.574 2.391 0.526 0.0 0.0 4.065 ENE 0.0 0.0 0.191 0.143 0 '74 1.387 0.191 0.0 0.0 2 '87 E 0.0 0.048 0.191 0.335 0.191 0.622 0.239 0.0 0.0 1.626 ESE 0.0 0.0 0.143 0.430 0.478 1.339 1.674 0.526 0.048 4 '39 SE 0.0 0.0 0.048 0.526 0.335 1.004 1.626 1.291 1.722 6.552 SSE 0.0 0.0 0.0 0.239 0.191 1.100 1.004 1.052 0.478 4.065 S 0 ' 0.0 0.096 0.0 0.143 0.526 0.717 0 F 239 0.096 1. 817 SSW 0 ' 0.0 0.0 0.096 0.096 0.239 0.287 0.048 0.383 1.148 SW 0.0 0.0 0.048 0.191 0.048 0.048 0.096 0.096 0.191 0.717 WSW 0.0 0.0 0.0 0.287 0.096 0.383 0.143 0.478 0.191 1.578 W 0.0 0.0 0.191 0.191 0.096 1.052 1.483 0.956 0.048 4.017 WHW 0.0 0.0 0.096 0.239 0.717 1.817 2.582 1.435 0 '48 6.934 HW 0.0 0.0 0.0 0.526 0.239 0.909 1.722 0.287 0.287 3 '69 HHW 0.0 0.0 0.048 0.096 0.478 1.578 1.817 0.335 0.0 4.352 SUBTOTAL 0.0 0.048 1.339 4.256 6.265 19.847 19.656 7.891 3.491 62.793 TOTAL HOVRS OF VALID STABILITY OBSERVATIONS 2098 TOTAL HOVRS OF STABZLZTY CLASS D 1319 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 1313 TOTAL HOURS OP VAIID WIND DIRECTZOH-WIND SPEED-STABILITY OBSERVATIONS 2091 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWHS PERRY NUCLEAR PLANT STABILITY BASED OH LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 92.63 METER LEVEL DATE PRINTED: 05/04/93 MEAH WIND SPEED ~ 13.2 MPH NOTE: TOTALS AHD SUBTOTALS ABOVE ARE OBTAINED PROM UNROUNDED NUMBERS

Page 57 of JOINT PERCENTAGE FREQUENCIES OF PEED BY WIND DIRECTION FOR-STABILITY CLASS E {-0. 5 C DELTA-T<~ 1 . 5 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAH 1, 93 - MAR 31, 93 WIND WIND SPEED(MPH)

DIRECTION 0.6-1.4 1 5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >~24.5 TOTAL N 0.0 0.0 0.0 0.143 0.143 1.052 0.478 0.048 0.0 1.865 HNE 0.0 0.0 0.0 0.096 0.048 0.670 1 ~ 961 0.765 0.0 3.539 NE 0 ~ 003 0.0 0.048 0.048 0.0 0.430 0.622 0.048 0.0 1.198 ENE 0.003 0.0 0.048 0.143 0.096 0.430 0.335 0.0 0.0 1.055 E 0.005 . 0.0 0.096 0.143 0.143 0.239 0.048 0.0 0.0 0.675 ESE 0.011 0.0 0. 191 0.143 0.239 0.956 0.765 0.143 o.o48 2.497 SE 0.003 0.0 0.048 0.096 0.143 0.909 2.009 1.148 0.287 4.642 SSE 0.008 0.096 0.048 0.096 0.239 0.622 1.530 0.861 0.191 3.690 S 0.005 0.0 0.096 0.0 0.048 0.574 0.478 0.096 0.143 1 ~ 440 SSW 0~0 0.0 0.0 0.0 0.191 0.239 0.335 0.096 0,.096 0.956 SW 0.0 0.0 0.0 0.048 0.0 0.335 0.096 0.143 0.096 0.717 WSW 0 ~ 003 0.0 0.048 o.o4e 0.048 0.622 0.813 0.191 0.191 1.963 W 0.003 0.0 0.048 0. 191. 0.096 0.622 0.574 0.096 0.0 1.629 WHW 0.003 0.048 0.0 0.'048 0.096 0.478 0.478 0.096 0.048 1.294 HW 0.003 0.0 0.048 0.0 0 ~ 096 0.239 0.574 0.048 0.0 1.007 NHW 0.0 0.0 0.0 0.0 0.143 0.574 0.574 0.048 0.0 1.339 SUBTOTAL 0.048 0.143 0.717 1.243 1.769 8.991 11.669 3.826 1.100 29.507 TOTAL HOURS OF VAIID STABZLITY OBSERVATIONS 2098 TOTAL HOURS OF STABILITY CLASS E 618 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 617 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABZLITY OBSERVATIONS 2091 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF'ROWNS FERRY NUCLEAR PLANT STABZLZTY BASED OH LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AHD DIRECTION MEASURED AT THE 92 '3 METER LEVEL DATE PRINTED: 05/04/93 MEAN WIND SPEED ~ 13 4 MPH NOTE: TOTALS AHD SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

Cl Page 58 o JOINT PERCENTAGE FREQUENCIES OF SPEED BY WIND DIRECTION FOR STABZLZTY CLASS F ( 1.5< DELTA-T<~ 4*0 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 93 MAR 31, 93 WIHD WIND SPEED(MPH)

DIRECTION CAI M 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 H 0.0 0.048 0.0 0.143 0.048 0. 191 0.143 0.0 0.0 0.574 NNE 0.0 0.0 0.0 0.048 0.048 0.096 0.048 0.0 0.0 0.239 HE 0.0 0.0 0.048 0.048 0.048 0.048 0.0 0.0 0.0 0.191 ENE 0.0 0.0 0.048 0.096 0.048 0.0 0.048 0.0 0.0 0.239 E 0.0 0.0 0.0 0.0 0.143 0.287 0.048 0.0 0.0 0.478 ESE 0.0 0.0 0.0 0.143 0.096 0.143 0.383 0.0 0.0 0.765 SE 0.0 0 ' 0.0 0.0 0.0 0.287 0.287 0.048 0.0 0.622 SSE 0.0 0.0 0.0 0.0 0 ~0 0.335 0.0 0.048 0.0 0.383 S 0.0 0.0 0.0 0.0 0.048 0 ~ 143 0.0 0.048 0.0 0.239 SSW 0.0 0.0 0.0 0.048 0.0 0.239 0.0 0.048 0.0 0.335 SW O.o 0.0 0.O 0.048 0.096 0 191 0.048 0.0 0.0 0.383 WSW 0.0 0,. 0 0.0 0.0 0 ' 0.0 0.048 0.0 0.0 0.048 W 0.0 0 .0 0.0 0.0 0.048 0.096 0.048 0.0 0.0 0.191 WHW 0.0 0 .0 0.0 0.0 0 0 0 096 0.0 0.0 0.0 0.096 HW 0.0 0 .0 0.048 0.0 0 ~0 0.048 0.0 0.0 0.0 0.096 HHW 0.0 0 .0 0.0 0.0 0.0 0 F 239 0.096 0.0 0.0 0.335 SUBTOTAl 0.0 0.048 0. 143 0.574 0 ~ 622 2.439 1.196 0.191 0.0 5.213 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2098 TOTAL HOURS OF STABILITY CLASS F 109 TOTAL HOURS OF VALID WIHD DIRECTION-WIND SPEED-STABILITY CLASS F 109 TOTAL HOURS OF VALID WIND DIRECTION WIND SPEED-STABILITY OBSERVATIONS 2091 TOTAL HOURS CALM 0 METEOROLOGICAL FACII ITY: MET FACILITY LOCATED 1 ~ 3 KM ESE OF BROWHS FERRY NUCLEAR PLANT STABILITY BASED OH LAPSE RATE MEASURED BETWEEN 45.30 AHD 89.59 METERS WIND SPEED AHD DIRECTION MEASURED AT THE 92.63 METER LEVEL DATE PRINTED: 05/04/93 MEAN WIND SPEED ~ 10.1 MPH NOTE: TOTALS AHD SUBTOTALS ABOVE ARE OBTAINED PROM UNROUNDED NUMBERS

Page 59 of JOINT PERCENTAGE FREQUENCIES OF PEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4. 0 C/100 M)

BROWNS FERRY NUCLEAR PLANT JAN 1, 93 MAR 31, 93 WIHD WIND SPEED(MPH)

DIRECTION CA344 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 H 0.0 0.0 0.0 0.0 0.048 0.048 0.0 0.0 0.0 0.096 HHE 0.0 0.0 0.0 0.0 0.048 0.0 0.0 0' "0.0 0.048 HE 0.0 0.0 0.0 0.048 0.0 0.048 0.0 0.0 0.0 0.096 ENE 0.0 0.0 0.0 0.0 0.048 0.048 0.0 0.0 0.0 0.096 E 0.0 0.0 0.0 0.0 0.096 0.096 0.0 0.0 0.0 0.191 ESE 0.0 0.0 0 ' 0.0 0.048 0.096 0.0 0.0 0 ' 0.143 SE 0.0 0.0 0.143 0.096 0.191 0.0 0.096 0 ' 0.0 0.526 SSE 0.0 0.0 0.0 0.0 0.143 0.191 0.096 0.0 0.0 0.430 S 0.0 0.0 0.0 0.0 0.048 0.143 0.0 0 ' 0.0 0.191 SSW 0.0 0.0 0.0 0.0 0.048 0.048 0.048 0.0 0.0 0.143 SW 0.0 0 ' 0.0 0.0 0.0 0.048 0.0 0' 0.0 0.048 WSW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 0.0 0.0 W 0.0 0.0 0.0 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 WHW 0.0 0.0 0 ' 0.0 0.096 0.048 0.0 0 ' 0.0 0.143-HW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 HHW 0.0 0 ' 0.0 0.0 0.0 0.048 0.0 0.048 0.0 0.096 SUBTOTAL 0.0 0.0 0.143 0.143 0.813 0 '61 0 F 239 0.048 0.0 2.248 TOTAL HOURS OF VALID STABZLZTY OBSERVATIONS 2098 TOTAL HOURS OF STABILITY CLASS G 47 TOTAL HOURS OF VALID WIND DZRECTIOH-WIND SPEED-STABILITY CLASS G 47 TOTAL HOURS OF VALID WZHD DIRECTION-WIND SPEED-STABILITY OBSERVATIOHS 2091 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY! MET FACILITY LOCATED 1.3 KM ESE OF BROWHS FERRY NUCLEAR PLANT STABILITY BASED OH LAPSE RATE MEASURED BETWEEN 45 30 AND 89.59 METERS WZND SPEED AHD DIRECTION MEASURED AT THE 92.63 METER LEVEL DATE PRINTED: 05/04/93 MEAH WIND SPEED 55 8 ~ 3 MPH NOTE: TOTALS AHD SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

Radiological Impact Assessment Browns Ferry Nuclear Plant January - June 1993

. Table6B Joint Frequency Distribution in Percent for Stack Releases Second Quarter

Cl Page 60 O JOZHT PERCENTAGE FREQUENCIES OF D SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<~ 1.9 C/100 M)

BROWHS FERRY NUCLEAR PLANT APR 1, 93 JUN 30, 93 WIND WIND SPEED(MPH)

DIRECTION 0.6-1.4 1.5 3.4 3.5-5.4 5 '-7.4 7.5-12.4 12.5-18.4 18.5-24.4 TOTAL H 0.000 0.000- 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 HHE 0.000 0.000 o.oaa a.aao 0.000 0.000 0.000 0.000 0.000 0.000 HE 0.000 0.000 0.000 0 ~ 000 0.000 0.000 0.000 0.000 0.000 0.000 EHE 0.000 0.000 0.000 0 F 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 o.oao o.ooa 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 0.046 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WHW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 HW 0.000 0.000 0.000 0.000 0 ~ 000 0.000 0.000 0.000 0.000 0.000 NHW 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 0.046 0.000 0.000 0.000 0.046 TOTAL HOURS Ot VALID STABILITY OBSERVATIONS 2167 TOTAL HOURS OF S'TABILITY CLASS h 1 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS h 1 TOTAL HOURS OF VALID WIND DIRECTIOH-WIND SPEED-STABILITY OBSERVATZOHS 2161 TOTAL HOURS CALM 0 METEOROLOGICAL tACILZTY: BROWHS tERRY NUCLEAR PLANT STABILITY BASED OH DELTA-T BETWEEN 45.30 AHD 89.59 METERS WIND SPEED AHD DZRECTZOH MEASURED AT 92.63 METER LEVEL DATE PRINTED: 30-JUL-93 MEAH WIND SPEED ~ 9.10 NOTE: TOTALS AHD SUBTOTALS ARE OBTAZHED tRON UHROUNDED NUMBERS

Page 61 o JOINT PERCENTAGE FREQUENCIES OF SPEED BY WIND DIRECTION FOR STABILITY CLASS B (-1 ~ 9< DELTA T<~-1.7 C/100 M)

BROWHS FERRY NUCLEAR PLANT APR 1, 93 JUH 30, 93 WIND WIND SPEED{MPH)

DIRECTION 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-16.4 18.5-24.4 2 '5 TOTAL H 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 HHE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 HE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 EHE 0.000 0.000 0.000 0.000 0.000 0 F 000 0.000 0.000 0 F 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 F 000 0 F 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 F 000 0.000 0.000 0 F 000 0.000 0 F 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 F 000 W 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WHW 0.000 0.000 0.000 0.000 0.000 0 F 000 0.000 0.000 0.000 0.000 HW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 HHW 0.000 0.000 0.000 0.000 0.000 0.000 0 000 0.000 0.000 0.000 SUBTOTAI 0.000 0 F 000 0 F 000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 TOTAL HOURS OF VALID STABILZTY OBSERVATIONS 2167 TOTAL HOURS OF STABILITY CLASS B 0 TOTAL HOURS OF VALID WIND DZRECTIOH-WIHD SPEED-STABILITY CLASS B 0 TOTAL HOURS Ot VALID WIND DIRECTIOH-WIND SPEED-STABILITY OBSERVATIONS 2161 TOTAL HOURS CALM 0 METEOROLOGICAL'tACZLITY: BROWHS tERRY NUCLEAR PLANT STABZIITY BASED OH DELTA-T BETWEEN 45.30 AHD 89.59 METERS WIND SPEED AND DIRECTIOH MEASURED AT 92.63 METER IEVEL DATE PRINTED: 30-JUL-93 MEAH WIHD SPEED ~ 0 00 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

0 Page 62 O JOZHT PERCENTAGE FREQUENCIES OF D SPEED BY WIND DIRECTION FOR STABILITY CLASS C (-1. 7< DELTA T<~-1. 5 C/100 M)

BROWNS FERRY NUCLEAR PLANT I

APR 1, 93 - JUH 30, 93 WIND WIND SPEED{MPH)

DIRECTIOH 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 H 0.000 0.000 .000 0.000 0.000 0.000 0,. 000 0 ~ 000 0.000 0.000 "HHE 0.000 0.000 .000 0.000 a.ooo 0.000 0.000 0.000 0.000 0.000 HE 0.000 0.000 .000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 EHE 0.000 0.000 .000 0.000 0 000 0.000 0.000 0.000 0.000 0.000 E 0.000 0.000 .000 0.000 0.000 0.000 0.000 o.ooa a.ooo 0.000 ESE '0. 000 0.000 .000 0.000 0.000 0 000 0.000 0.000 0.000 0.000 SE 0.000 0;000 .000 0.000 0.000 0.000 0 ~ 000 0.000 0.000 0.000 SSE 0.000 0.000 .000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 S 0.000 0.000 .000 0.000 0 ~ 000 0.000 0.000 0.000 0.000 '0.000 SSW 0.000 0.000 .000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 SW 0.000 0.000 .000 0.046 0 '46 0 ~ 185 0.093 0.000 0.000 0.370 WSW 0.000 0.000 .000 0.000 0.046 0.093 0.000 0 '46 0.000 0.185 W 0.000 0.000 .046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 WHW 0.000 0.000 .000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 .000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NHW 0.000 0.000 .000 0.000 0.000 0 ~ 000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.000 0.046 0.093 0.139 0.278 0.093 0.046 0.000 0.694 TOTAL HOURS OF VALID STABILITY OBSERVATZOHS 2167 TOTAL HOURS OF STABILITY CLASS C 16 TOTAL HOURS OF VALID WZND,DIRECTION-WIND SPEED-STABILITY CLASS C 15 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIOHS 2161 TOTAL HOURS CALM 0 METEOROLOGICAL tACILITY: BROWHS tERRY NUCLEAR PLANT STABZLITY BASED OH DELTA-T BETWEEH 45 '0 AHD 89 WIND SPEED AHD DIRECTION MEASURED AT 92.63 METER LEVEL

'9 METERS DATE PRZHTED: 30-JUL-93 MEAN WIND SPEED ~ 9.16 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Page 63 o JOINT PERCENTAGE FREQUENCIES Ot SPEED BY WIND DIRECTION FOR STABZIITY CLASS D (-1.5< DELTA T<~-0.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 93 JUN 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 H 0.003 0.000 0.093 0.093 0.370 0.925 1.342 0.000 0.000 2.826 NHE 0.001 0.000 0.046 0 '39 0.046 1.203 1.157 0.046 0.000 2.639 HE 0.005 0.046 0.139 0.231 0.324 0.648 0.324 0.000 0.000 1.718 EHE 0.005 0.000 0.185 0.231 0.185 0.740 0.093 0.000 F 000 1.440 E 0.005 0.000 0.185 0.324 0.185 0.324 0.185 0.000 0.000 1.209 ESE 0.004 0.000 0.139 0.139 0.555 0.787 0.694 0.093 F 000 2.410 SE 0.019 0.046 0.602 0.833 0.833 1.527 1.203 0.694 0.463 6.220 SSE 0 014 0.046 0.416 0.370 0.740 1.944 1.296 0.602 0.555 5.983 S 0.014 0.000 0.463 0.370 0.324 1.573 1.944 1.342 0.648 6.677 SSW 0.018 0.046 0.555 0.509 0.416 1.342 1.527 0.879 0.370 5.663 SW 0.010 0.093 0.231 0.370 0.694 1.666 1.620 0.463 0.093 5.239 WSW 0.012 0.000 0.416 0.463 0.370 0.972 0.555 0.416 0.278 3.483

'W 0.008 0.046 0.231 0.787 0.925 0.879 0.509 0.416 0.324 4.127 WHW 0.008 0.093 0.185 0.509 0.740 1.296 0.463 0.185 0.093 3.571 HW 0.004 0.000 0.139 0.509 0.370 1.435 1.064 0.787 0.093 4.400 HHW 0.007 0.000 0.231 0.324 0.416 1 '57 0.925 0.231 0.000 3.292 SUBTOTAL 0.139 0.416 4 '57 6.201 7.497 18.417 14.901 6.155 2.915 60.898 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2167 TOTAL BOURS OF STABILITY CLASS D 1320 TOTAL HOURS Ot VALID WIND DIRECTION-WIHD SPEED-STABILITY CLASS D 1316 TOTAL HOURS OF VAI ID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2161 TOTAL HOURS CALM 3 METEOROLOGICAL FACILITY: BROWHS tERRY NUCLEAR PLAHT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89 WIND SPEED AHD DIRECTION MEASURED AT 92.63 METER LEVEL

'9 METERS DATE PRINTED: 30-JUL-93 MEAH WIND SPEED ~ 11.48 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Page 64 o JOINT PERCENTAGE FREQUENCIES OF SPEED BY WIND DIRECTION FOR STABILITY CLASS E {-0.5< DELTA T<~ 1.5 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 93 - JUH 30, 93 WIND WIND SPEEDtMPH)

DZRECTION 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 H 0.011 0.046 0.185 0.046 0.046 0.463 0.833 0.000 0.000 1.630 HHE 0.002 0.046 0.000 0.093 0.093 0.833 0.231 0.000 0.000 1.298 HE 0.002 0.046 0.000 0.093 0.185 0.231 0 '02 0.093 0.000 1.252 EHE F 000 0.006 0.000 0.000 0.000 0.139 0.139 0 '78 0.278 0.000 0.000 0.833 E 0.139 0.093 0.046 0.555 0.139 0.046 0.000 1.024 ESE 0.019 0 '85 0.231 0.278 0.185 0.416 0.555 0.046 0.139 2.055 SE 0.011 0.046 0.185 0.416 0.463 1.388 1.666 0.416 0.231 4.823 SSE 0 '11 0.139 0.093 0.416 0.324 1.388 1.249 0.509 0.139 4 F 268 S 0.004 0.000 0.093 0.185 0.231 1.481 1.157 0.555 0.093 3 '99 SSW 0.015 0.000 0.324 0.185 0.278 0.602 0.555 0.185 0.000 2.144 SW 0.013 0.000 0.278 0.139 0.139 0.740 0.740 0.046 0.000 2.095 WSW 0.009 0.093 0.093 0.093 0.185 0'. 833 0.139 0.046 0.000 1.489 W 0.009 0.000 0.185 0.139 0 ~ 185 0.231 0.046 0.000 0.000 0.795 WHW 0.004 0.000 0.093 0.231 0.324 0.463 0.000 0.000 0.000 1.115 NW 0.017 0.046 0.324 0.139 0.185 0.370 0.046 0.046 F 000 1.174 HNW 0.006 0.046 0.093 0.046 0 '85 0.185 0.463 0.093 0.000 1.117 SUBTOTAL 0.139 0.694 2.314 2.730 3.193 10.458 8.700 2.082 0.602 30.912 TOTAL HOURS Ot VALID STABZIZTY OBSERVATIONS 2167 TOTAL HOURS OF STABILITY CLASS E 669 TOTAL HOURS OF VALZD WIND DIRECTION-WIND SPEED-STABIZZTY CLASS E 668 TOTAL HOURS OF VALID WZHD DIRECTION-WZHD SPEED-STABILITY OBSERVATIONS 2161 TOTAL HOURS CALM 3 METEOROLOGICAL FACILITY: BROWNS tERRY HUCLEAR PLAHT STABILITY BASED ON DELTA-T BETWEEN 45.30 AHD 89.59 METERS WIND SPEED AHD DIRECTION MEASURED AT 92.63 METER LEVEL DATE PRINTED: 30-JUL-93 MEAN WIND SPEED ~ 10.73 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

Page 65 JOINT PERCENTAGE FREQUENCIES Or SPEED BY WIND DIRECTIOH FOR STABILITY CLASS F ( 1.5< DELTA T<~ 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 93 JUH 30, 93 WIND WIND SPEED(MPH)

DIRECTION 0.6-1 ' 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12 '

12.5-18.4 18.5-24.4 24.5 TOTAL H 0.014 0.000 0.046 0.000 0.000 0.046 0.185 0.000 0.000 0.292 HHE 0.000 0 F 000 0.000 0.046 0.000 0.046 0.093 0.000 0.000 0.185 HE 0.000 0 F 000 F 000 0 F 000 0.093 0.093 0.139 0.139 0.000 0.463 EHE 0.014 0.000 0.046 0.046 0.046 0.093 0.278 0.093 0.000 0.615 E 0.014 0.000 0.046 0.093 0.139 0.093 0.139 0.000 0.000 0.523 ESE 0.028 0.000 0.093 0.278 0.231 0.185 0.000 0.000 0.000 0.814 SE 0.014 0.000 0.046 0 093 0.139 0.324 0.139 0.000 0.000 0.754 SSE 0.000 0.014 0.000 0.000 0.000 0.139 0 '31 0.231 0.000 0.000 0.602 S 0.000 0.046 0.046 0.046 0.185 0.463 0.000 0.000 0.801 SSW 0.000 0.000 0.000 0.046 0.093 0.231 0.139 0.139 0.000 0.648 SW 0.000 0.000 0.000 0.046 0.093 0.046 0.046 0.000 0.000 0.231 WSW 0.014 0.000 0.046 0.000 0.000 0.093 0.093 0.000 0.000 0.245 W 0.000 0.000 0.000 0.000 0.139 0.046 0.093 0.000 0.000 0 278 WHW 0.000 0.000 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.093 HW 0.014 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.060 HHW 0.014 0.000 0.046 0.000 0.046 0.000 0.000 0.000 0.000 0.106 SUBTOTAL 0.139 0.000 0.463 0.694 1.203 1.758 2.082 0.370 0.000 6.710 TOTAL HOURS Or VALID STABILITY OBSERVATIOHS 2167 TOTAL HOURS Or STABILITY CLASS F 145 TOTAL HoURs or vhz,zn wzHn nzREcTzoH-wzHD spEEn-sTABznzTY cz,hss r 145 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2161 TOTAL HOURS CALM 3 METEOROLOGICAL FACILITY: BROWHS FERRY llUCLEAR PLANT STABZLZTY BASED OH DELTA-T BETWEEN 45.30 AHD 89.59 METERS WIND SPEED AHD DIRECTION MEASURED AT 92.63 METER LEVEL DATE PRZNTED: 30-JUL-93 MEAN WIND SPEED ~ 10 ~ 10 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED HUMBERS

Page 66 JOINT PERCEHTAGE FREQUENCIES OF W SPEED BY 'WIND DZRECTIOH FOR STABILITY CLASS 6 (DELTA T > 4.0 C/100 M)

BROWNS FERRY NUCLEAR PLANT APR 1, 93 - JUH 30, 93 WIND WIND SPEEDtMPB)

DIRECTION 0.6-1 ' 1.5-3.4 3.5-5. ~ 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 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NHE 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 0.046 0.000 0.000 0.000 0.046 EHE 0.000 0.000 0.000 0.000 0.093 0 F 000 0.000 0.000 0.000 0.093 E 0.000 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.093 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 F 000 0.000 SE 0.000 0.000 0.000 0.046 0.000 0.046 0.093 0.000 0.000 0.185 SSE 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046, S 0.000 0 F 000 0.000 F 000 0.000 0.093 0.093 0.000 0.000 0.185 SSW 0.000 0.000 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.093 SW 0.000 0.000 0 F 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 F 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 WHW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 F

0.000 HW 0 F 000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW F 000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 F 000 0.000 SUBTOTAL 0.000 0.000 0.000 0.046 0.231 0.231 0.231 0.000 0.000 0.740 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2167 TOTAL HOURS OF STABILITY CLASS 0 16 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS 6 16 TOTAL HOURS OF VALID WIND DIRECTIOH-WIHD SPEED-STABILITY OBSERVATZOHS 2161 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: BROWHS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DZRECTIOH MEASURED AT 92.63 METER LEVEL DATE PRZHTED: 30-JUL-93 MEAN WIND SPEED  % 10 ~ 22 NOTE: TOTALS AHD SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

ENCLOSURE 2 TENNESSEE VALLEY AUTHORITY SEMIANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT BROWNS FERRY NUCLEAR PLANT (BFN)

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT

SUMMARY

FIRST HALF 1993 The radioactive effluents for the first half of 1993 were normal for a three unit boiling water reactor plant with one unit operating and the other two in extended outage.

The release of radioactive material to the environment from Browns Ferry has been a small fraction of the 10 CFR 20 Appendix B and 10 CFR 50 Appendix I limits.

Page 1 of 17

EFFLUENT AND HASTE DISPOSAL SEMIANNUAL REPORT SUPPLEMENTAL INFORMATION FIRST HALF 1993 I. Re ulato Limits A. Fission and Activation Gases in Gaseous Effluent:

The release of fission and activation gases is regulated by the dose limits of 10 CFR 50 Appendix I. The air dose, to areas at and beyond the site boundary due to noble gases released in gaseous effluents per unit, shall be limited during any calendar quarter to g 5 millirad (mrad) for gamma radiation and g 10 mrad for beta radiation; and during any calendar year to g 10 mrad for gamma radiation and g 20 mrad for beta radiation.

B. and C. Iodines and Particulates with Half-Lives Greater than Eight Days in Gaseous Effluents.

The release of iodines and particulates in gaseous effluent is regulated by the dose limits of 10 CFR 50 Appendix I. The dose to a member of the public from radioiodines, radioactive materials in particulate form, and radionuclides other than noble gases with half-lives greater than eight days in gaseous effluent released per unit to areas at and beyond the site boundary shall be limited to any organ during any calendar quarter to g 7.5 millirem (mrem), and during any calendar year to g 15 mrem.

D. Liquid Effluents The release of radioactive liquid effluents is regulated by the dose limits of 10 CFR 50 Appendix I. The doses or dose commitment to a member of the public from radioactive materials in liquid effluents released from each unit to unrestricted areas shall be limited during any calendar quarter to g 1.5 mrem to the total body and < 5 mrem to any organ and during any calendar year to < 3 mrem to the total body and < 10 mrem to any organ.

Page 2 of 17

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT SUPPLEMENTAL INFORMATION FIRST HALF 1993 II. Maximum Permissible Concentrations A. Fission and Activation Gases in Gaseous Effluent:

1. The instantaneous release rate of fission and activation gases is regulated by the dose rate limit of 10 CFR 20 Appendix B. The dose rate at any time to areas at and beyond the site boundary due to noble gases released in gaseous effluents from the site shall be limited to < 500 mrem per year to the total body and

< 3000 mrem per year to the skin.

2. The BFN Offsite Dose Calculation Manual (ODCM) determines the maximum noble gas release rate based upon the dose rate limits in Section III. The instantaneous noble gas release rates are limited by the following equation:

91 + BR<1 0.15'4.4 Ql = The release rate from the building exhaust vents in Ci per

,second.

Q2 = The release rate from the main stack in Ci per second.

B. and C. Iodines and Particulates with Half-Lives Greater than Eight Days in Gaseous Effluents

1. The instantaneous release rate of particulates and iodines is regulated by the dose rate limit of 10 CFR 20 Appendix B. The dose rate at any time to areas at and beyond the site boundary, due to I-131, H-3 and particulates with greater than eight days half-lives released in gaseous effluents from the site, shall be limited to < 1500 mrem per year to any organ.

2. The BFN ODCM determines the maximum particulate and iodine release rate based upon the dose rate limit in Section III. The instantaneous iodine and particulate release rates are limited by the following equation:

+ 94<1 2.19 35.7 Q3 = The release rate from the building exhaust vents in pCi per second.

Q4 = The release rate from the main stack in pCi per second.

Page 3 of 17

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT SUPPLEMENTAL INFORMATION FIRST HALF 1993 II. Maximum Permissible Concentrations (Continued)

D. Liquid Effluents

1. The concentration of radionuclides in liquid effluents released at any time from the site to unrestricted areas shall be limited to the concentrations specified in 10 CFR 20, Appendix B, Table II, Column 2 for radionuclides other than dissolved or entrained noble gases.

2. For dissolved or entrained noble gases, the concentration shall be limited to 2E-4 pCi per milliliter (ml) total activity.

III. Avera e Ener Not a licable IV. Measurements and A roximations of Total Radioactivit A. Fission and Activation Gases:

Noble gases in the building vent and stack gaseous effluent are continuously monitored. The flow rate of the stack is continuously monitored and the building vent effluent flow rates are calculated once a shift based on the configuration of operating exhaust fans. The flow rate data is consolidated weekly to determine the volume of airborne effluent released from the plant. The noble gas monitor data is consolidated monthly to determine the total curies of noble gases released during the month.

2~ Gas grab samples are. taken and analyzed monthly to determine the relative noble gas activity concentrations. This information is used to apportion the total curies of noble gases released among different noble gas radionuclides.

3~ The tritium concentration is determined by the analysis of a monthly grab sample for each release point.

B. and C. Iodines and Particulates Iodines and particulates are continuously sampled on impregnated charcoal filters and particulate filters, respectively. The charcoal and particulate samples are replaced at least weekly and analyzed to determine specific activity concentrations. The specific activity concentrations and vent flow rate data are used weekly to verify that release rate limits were not exceeded. The specific activity concentrations and total volume of gaseous effluent are used on a monthly basis to determine the total curies of each particulate and iodine released during the month.

Page 4 of 17

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT SUPPLEMENTAL INFORMATION FIRST HALF 1993 IV. Measurements and A roximations of Total Radioactivit Continued

2. The gross alpha concentration is determined by analysis of a monthly particulate filter composite sample and strontium -89 and -90 are determined by analysis of a quarterly particulate filter composite sample for each release point.

D. Liquid Effluents

1. The gamma ray emitting radionuclide concentrations are determined for each batch by gamma ray spectroscopy analysis of a grab sample.

The allowable release rate is calculated for each batch based upon the known dilution flow. The flow rate of the liquid effluent is continuously monitored and the total volume released in each batch is determined. The total gamma activity released in each batch is determined by multiplying the radionuclide concentrations by the total volume discharged. The total gamma activity released during the month is then determined by summing the gamma activity content of each batch discharged during the month.

2. The gross alpha and tritium concentrations are measured on a monthly composite sample. The strontium -89 and -90 and iron -55 are measured on a quarterly composite sample.

V. Batch First Second Quarter Quarter Units A. Liquid

1. Number of batches released 98 67 Each

2. Total time period for batch releases 25870 19065 Minutes

3. Maximum time period for a batch release 375 380 Minutes

4. Average time period for batch releases 263 278 Minutes

5. Minimum time period for a batch release 12 165 Minutes

6. Average stream flow during period of release of effluent into a flowing stream 75925 33726 cfs B. Gaseous None VI. ABNORMAL/UNPLANNED RELEASES (1)

NUMBER OF TOTAL RELEASES ACTIVITY A. Liquid None None B. Gaseous None None (1) All abnormal/unplanned releases shall be discussed in the summary.

Page 5 of 17

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT FIRST HALF 1993 LIQUID EFFLUENTS SUMMATION OF ALL RELEASES First Second QQg~t. QQRXtt,r $ j'%AQUA A. Fission and Activation Products

1. Total Releases Curies 3.71E+00 3.52E-Ol

2. Average Diluted Concentration Released During Period pCi/ml 8.31E-08 9.04E-09

3. Percent of Applicable Limit (1.00E-07 pCi/ml) 8.31E+01 9.04E+00 B. Tritium

1. Total Releases Curies 5.26E+00 1.58E+00

2. Average Diluted Concentration Released During Period pCi/ml 1. 18E-07 4. 06E-08 t C.

3.

1.

2.

Percent of Applicable Limit (3E-03 pCi/ml)

Dissolved and Entrained Noble Gases Total Releases Average Diluted Concentration Released During Period Curies pCi/ml 3.93E-03 1.60E-01 3.59E-09 1.35E-03 2.07E-04 5.30E-12

3. Percent of Applicable Limit (2E-04 pCi/ml) 1.79E-03 2.65E-06 D. Gross Alpha Radioactivity

1. Total Releases Curies ND ND 48

2. Average Diluted Concentration Released During Period pCi/ml ND ND E. Volume of Liquid Waste to Discharge Canal (Before dilution) Liters 1.13E+07 8.08E+06 3 F. Volume of Dilution Water for Period Liters 4.46E+10 3.90E+10 10 G. Total CCW flow Gigagallons 81.3 1 Includes Ze-133, Ze-135, and others Page 6 of 17

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT LIQUID RELEASES FOR FIRST HALF 1993 BATCH MODE

~Isoto e First Quarter Second Quarter (Required by Regulation (REG) Guide 1.21) Unit Curies Unit Curies

1. Cr-51 3.59E-01 9.77E-04

2. Mn-54 5.01E-01 2.74E-02

3. Co-58 2.57E-01 2.75E-03

4. Fe-59 1.48E-02

5. Co-60 1.72E+00 7.52E-02

6. Zn-65 4.39E-01 1.61E-02

7. Nb-95

8. Zr-95

9. Mo-Tc-99m 3.30E-02 2.24E-05

10. I-131 3.58E-02 1.15E-04 ll. Xe-133 1.29E-Ol 1.51E-05

12. Cs-134 1.12E-02 1.01E-02

13. Xe-135 2.86E-02 1.86E-04

14. Cs-137 5.56E-02 5.86E-02

15. Ba-140 2.71E-04

16. La-140

17. Ce-141 ND

18. Sr-89 5.58E-03 1.69E-02

19. Sr-90 4.72E-04 3.01E-04 Page 7 of 17

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT LIQUID RELEASES FOR FIRST HALF 1993 BATCH MODE Lad's First Quarter Second Quarter (Not Required by Regulation (REG) Guide 1.21) 3I~Quriea

1. Fe-55 5.49E-03 1.42E-01

2. Na-24 2.30E-01 1.57E-03

3. Tc-104 3.04E-09 ND

4. I-132 4.42E-04 ND

5. I-133 2.02E-02 1.37E-04

6. I-135 6.54E-03 ND

7. Xe-133m 3.01E-03 ND

8. Ze-135m 1.51E-07 ND

9. Y-91m 2.48E-04 ND

10. Ru-103 2.91E-03 ND ll. Sr-92 2.34E-04 2.93E-05

12. Ar-41 ND 5.68E-06

13. Ag-110m 1.94E-03 3.29E-03

14. Co-57 7.31E-04 ND

15. I-134 1.13E-05 ND

16. Cs-136 4.38E-04 ND

17. Sb-124 4.53E-03 ND Page 8 of 17

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT FIRST HALF 19931 GASEOUS EFFLUENTS SUMMATION OF ALL RELEASES First Second Summation of All Releases Unit Quarter Quarter X Error A. Fission and Activation Gases

1. Total Releases Curies 3.32E+03 2.18E+02 45

2. Average Release Rate for Period pCi/sec 4.23E+02 2.77E+01

3. Percent of Technical Specification (TS) limit 3.05E-03 1.93E-04 B. Iodines

1. Total Iodine-131 Ec I-133 Ci 2.01E-02 1.72E-03 36

2. Average Release Rate for Period pCi/sec 2.56E-03 2.19E-04

3. Percent of TS limit  %%d 1.08E-01 8.14E-03 C. Particulates

1. Particulates with half-lives

> eight days Ci 1.68E-02 3.72E-03 35

2. Average release rate for period pCi/sec 2.14E-03 4.73E-04

3. Percent of TS limit X 9.75E-02 2.15E-02

4. Gross alpha radioactivity Ci ND 1.25E-06 D. Tritium

1. Total release Ci 1.45E+00 9.39E-01 21

2. Average release rate for period pCi/sec 1.85E-Ol 1.19E-01

3. Ground level release Ci 1.44E+00 9.06E-01

4. Elevated release Ci 9.61E-03 3.26E-02 Reporting period 181 days.

The dose rate limit for Noble gases shall be < 500 mrem per year to the total body and < 3000 mrem per year to the skin and the dose rate limit for I-131, I-133, H-3, and particulates with g eight day half-lives shall be

< 1500 mrem per year to any organ.

Page 9 of 17

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT FIRST HALF 19931 GASEOUS EFFLUENTS ELEVATED RELEASE First Second Unit Quarter Quarter

1. Fission Gases Kr-85m Ci 5.58E+02 2.46E+01 Kr-85 Ci ND ND Kr-87 Ci 2.63E+02 4.28E+Ol Kr-88 Ci 9.57E+02 6.70E+Ol Xe-133 Ci 1.40E+03 1.76E+01 Ze-135m ND Ze-135 Ci 8.65E+Ol 2.10E+01 Xe-138 Ci 2.51E+01 Others (specify)

Ar-41 Ci ND 1.98E+Ol Xe-133m 5.56E+01 ND Total for Period Ci 3.32E+03 2.18E+02

2. Iodines I-131 Ci 6.24E-04 3.56E-05 I-132 Ci ND ND I-133 Ci 1.01E-03 3.09E-04 I-134 Ci I-135 Ci 1.47E-03 ND Total for Period Ci 3.11E-03 3.45E-04 Page 10 of 17

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT FIRST HALF 19931 GASEOUS EFFLUENTS ELEVATED RELEASE First Second Unit Quarter Quarter

3. Particulates Sr-89 1 Ci 3.67E-05 2.36K-05 Sr-90 1 Ci Cs-134 Ci ND Cs-137 Ci Ba-140 Ci La-140 Ci Others (specify)

Ag-110m Ci ND ND Ba-139 Ci 9.78E-02 ND Ce-141 Ci ND ND Co-58 Ci ND ND Co-60 Ci ND ND Cr-51 Ci ND ND Mn-54 Ci ND ND MoTc-99m Ci ND ND Na-24 Ci ND ND Zn-65 Ci ND ND Sr-91 Ci ND ND Y-91m Ci 2.83E-02 ND Ru-103 Ci ND ND Total for Period Ci 1.26E-01 2.36E-05

4. Tritium Ci 9.61E-03 3.26E-02 Predicted estimation of releases.

Include all particulate nuclides (even those with half-lives < 8 days)

Page ll of 17

EFFLUENT AND HASTE DISPOSAL SEMIANNUAL REPORT FIRST HALF 19931 GASEOUS EFFLUENTS GROUND LEVEL RELEASE First Second Unit guarter Quarter

1. Fission Gases Kr-85m Ci Kr-85 Ci ND Kr-87 Ci ND ND Kr-88 Ci ND ND Xe-133 Ci 3.82E-03 ND Xe-135m Ci ND ND Xe-135 Ci 1.32E+00 ND Xe-138 Ci ND Others (specify)

Ar-41 Ci Xe-133m Ci Total for Period Ci 1.32E+00 ND

2. Iodines I-131 Ci 2.37E-03 1.35E-04 I-132 Ci 1.80E-03 ND I-133 Ci le61E-02 1.24E-03 I-134 Ci ND ND I-135 Ci ND ND Total for Period Ci 2.03E-02 1.38E-03 Predicted estimation of releases; Page 12 of 17

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT FIRST HALF 19931 GASEOUS EFFLUENTS GROUND LEVEL RELEASE First Second Unit guarter guarter

3. Particulates Sr-89 1 Ci 5.02E-05 3.25E-05 Sr-90 1 Ci Cs-134 Ci 1.95E-04 1.24E-04 Cs-137 Ci 3.62E-04 3.33E-04 Ba-140 Ci 4.18E-04 La-140 Ci 1.26E-04 Others (specify)

Ag-110m Ci 1.04E-03 3.71E-04 Ba-139 Ci 1.30E-01 ND Co-58 Ci 5.63E-04 9.65E-05 Co-60 Ci 1.90E-03 1.10E-03 Cr-51 Ci 9.17E-03 1.89E-04 Mn-54 Ci 6.28E-04 5.23E-04 Mo-Tc-99m Ci 1.89E-03 5.89E-06 Na-24 Ci 8.09E-02 ND Zn-65 Ci 1.71E-03 5.26E-04 Y-91m Ci 2.91E-03 ND Fe-59 Ci ND 8.33E-05 Nb-95 Ci ND 3.15E-04 Total for Period Ci 2.32E-Ol 3.39E-03

4. Tritium Ci 1.44E+00 9.06E-Ol Predicted estimation of releases.

Include all particulate nuclides (even those with half-lives < 8 days)

Page 13 of 17

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT FIRST HALF 1993 SOLID WASTE AND IRRADIATED FUEL SHIPMENTS A. Solid Waste Shipped Offsite For Burial Or Disposal (Not Irradiated Fuel)

1. Type of Waste Units Amount Error  %

a. Spent resins, filter m3 9.21E+Ol sludges, evaporator Ci 1.07E+03 1.50E+Ol bottoms, etc.

• b. Dry compressible waste m3 5.58E+Ol contaminated equip., etc. Ci 2.55E+00 1.50E+Ol

c. Irradiated components, 1.82E+Ol control rods, etc. Ci 1. 70E+Ol 1. 50EIOl

d. Other m3 O.OOE+00 Ci O.OOE+00 N/A

• Dry compressible waste shipped from processor to the burial ground.

53.6 m3, 2.45E+00 Ci. These numbers are included in b.

2. Estimate of major nuclide composition (by waste type)

a. Spent, resins, filter sludge, evaporator bottoms, etc.

Nuclide Percenta e Ci

l. Iron 55 (2) 1.43E+01 1.52E+02

2. Cobalt-60 (1) 3.49E+01 3.70E+02

3. Cesium-134 (1) 1.12E+00 1.19E+Ol

4. Cesium-137 (1) 4.07E+00 4.31E+Ol

5. Nickel-63 (1) 4.30E+00 4.56E+01

6. Manganese-54 (1) 1.08E+01 1.15E+02

7. Zine-65 (1) 1.74E+Ol 1.85E+02

8. Chrominum-51 (1) 4.83E+00 5.12E+Ol

9. Cobalt-58 (1) 2.36E+00 2.50E+Ol

10. Silver-llOM (1) 5.26E+00 5.58E+Ol ll. Other 7.84E+00 (1) Measured (2) Calculated Page 14 of 17

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT FIRST HALF 1993 SOLID WASTE AND IRRADIATED FUEL SHIPMENTS (Continued)

A. Solid Waste Shipped Offsite For Burial Or Disposal (Not Irradiated Fuel) (Continued)

2. Estimate of major nuclide composition (by waste type) (Continued)

b. Dry compressible waste, contaminated equipment, etc.

Knclide ercenta e Ci

l. Iron-55 (2) 3.79E+01 9.67E-01

2. Cobalt-60 (2) 4.82E+01 1.23E+00

3. Nickel-63 (2) 2.86E+00 7.29E-02

4. Cesium-137 (2) 10.0E+00 2.47E-Ol

c. Irradiated components, control rods, etc.

l. Iron-55 (2) 4.29E+Ol 7.29E+00

2. Cobalt-60 (2) 3.10E+Ol 5.27E+00

3. Chromium -51 (2) 7.70E+00 1.31E+00

4. Manganese-54 (2) 4.80E+00 8.16E-01

5. Cobalt-58 (2) 6.90E+00 1.17E+00

6. Nickel-63 (2) 3.70E+00 6.29E-01

7. Zinc-65 (2) .1.20E+00 2.04E-Ol

8. Iron-59 (2) 9.00E-01 1.53E-01

d. Other None (1) Measured (2) Calculated 3 Solid Waste Disposition Number of Mode of

~Shi ments Trans ortation Destination Sole Use Truck Barnwell, 0

21 SC 16 Sole Use Truck Quadrex, Oak Ridge, TN 14 Sole Use Truck SEG, Oak Ridge, TN Sole Truck Alaron Wampum, PA Page 15 of 17

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT FIRST HALF 1993 SOLID WASTE AND IRRADIATED FUEL SHIPMENTS (Continued)

B. Irradiated Fuel Disposition Number of Mode of

~Shi ments Trans ortation Destinatio None N/A N/A C. Description of Shipments Number of Type Type Number of Container Type

~Shi ments Container ~uantit Containers Volume Waste 31 Strong A-LSA See Note See Note DAW Tight Container (STC)

High A-LSA 5.83m3 Dewatered Integrity Resin Container (HIC)

HIC B-LSA 5.83m3 Dewatered Resin HIC A-LSA 5.50m3 Dewatered Resin HIC B-LSA 3.4lm3 Dewatered Resin

.HIC A-LSA 3.41m3 Dewatered Resin DOT 7A A-LSA 9.10m3 Irradiated Type A Hardware Metal Box DOT 7A A-LSA .54m3 Dewatered Type A Resin 24" Pressure Vessel Solidification agents used: None Absorbents used: None Page 16 of 17

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT FIRST HALF 1993 SOLID WASTE AND IRRADIATED FUEL SHIPMENTS (Continued)

C. Description of Shipments (continued)

NOTE: 31 shipments to waste processor contained the following:

Type of Number of Volume Each

~Packa e ~Packa ee 40'ealand (STC) 72.50 20'ealand (STC) 22 36.25 "FR" Box (STC) 12 06.40 "B" Box (STC) 68 02.66 "17H/55 Gallon" 00.21 Drums (STC)

Leaded Box (STC) 12. 90 Metal DAW Box (STC) 3.17 Metal DAW Box (STC) 4.56 Steel Pressure Vessel .54 24" (STC)

Page 17 of 17

4 ENCLOSURE 3 TENNESSEE VALLEY AUTHORITY SEMIANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT BROWNS FERRY NUCLEAR PLANT (BFN)

INOPERABLE RADIOLOGICAL EFFLUENT INSTRUMENTATION REPORT

This report is to comply with Browns Ferry Nuclear Plant Technical Specifications (TSs), Sections 3.2.D.2, 3.2.K.2 and Offsite Dose Calculation Manual (ODCM),

Sections 1/2.1.1 and 1/2.1.2. The BFN TS and ODCM require the exertion of best efforts to return inoperable radiological effluent monitoring instrumentation to an operable status within 30 days. Failure to return the inoperable instruments to an operable status requires a description in the next Semiannual Radioactive Effluent Release Report.

During the reporting period, January 1 through June 30, 1993, there was no airborne or liquid radiological effluent instrumentation inoperable for periods The Effluent Monitors, which have been placed in "out-of-service" status with their effluent streams isolated, are not applicable for this report.

During this period, Units 1 and 3 were defueled and Unit 2 operating.

Page 1 of 1