ML18036A842

Semiannual Radioactive Effluent Release Rept,Browns Ferry Nuclear Plant,Jan-June 1992.

ML18036A842
Person / Time
Site:	Browns Ferry
Issue date:	06/30/1992
From:	TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML18036A840	List: ML18036A839 ML18036A842 ML18036A844
References
NUDOCS 9209020222
Download: ML18036A842 (157)

Text

BROWNS FERRY NUCLEAR PLANT SEMIANNUAL RADIOACTIVEEFFLUENT RELEASE REPORT JANUARY THROUGH JUNE 1992

~, -4voqoaoma eaosas PDR ADOCK 05000259 PDR' R

r 5

f

ENCLOSURE I TENNESSEE VALLEY AUTHORITY SEMIANNUAL RADIOACTIVE EFFLUENT'ELEASE REPORT BROWNS FERRY NUCLEAR PLANT (BFN)

"THE RADIOLOGICAL IMPACT ASSESSMENT REPORT"

BFN Rad Impact Jan-June 1992 Page 1 of 72 Radiological Impact Assessment Browns Ferry Nuclear Plant January-June 1992 INTRODUCTIO Potential doses to individuals and the populatibn around Browns Ferry are calculated for each quarter as required in Section F.2 of the Radiological Effluent Manual. Measured plant releases for the reporting period are used to estimate these doses. Dispersion of radioactive effluents in the environment is estimated in accordance with the guidance provided by Regulatory Guides 1.109, 1.111 and 1.113 using meteorological data and riverflow data measured during the period. Using dose calculation methodologies which are described in detail in the Browns Ferry Offsite Dose Calculation Manual, the doses are calculated and used to determine compliance with the dose limits contained in Browns Ferry's Operating License. In this report, the doses resulting from releases are described and compared to quarterly and annual limits established for Browns Ferry.

SUMMARY

OF LI UID AND GASEOUS EFFLUENT RELEASES FIRST HALF 1 2 Although nuclear plants are designed to contain the radioactive material created by the fission process, small amounts of this material escape from the fuel rods. Also, very small amounts of the structures and components of the systems become activated through the bombardment of neutrons and are worn away. This radioactive material can be transported throughout plant systems and released to the environment.

Airborne Releases The noble gas fission products do not mix with water and are given off in a gaseous form. A very small amount of solid radioactivity is given off along with these noble gases. The most significant releases are processed so that the radioactive material is filtered and/or decayed prior to release through the plant vents. Sampling and monitoring methods are used to determine the amount of radioactive material released. If these methods indicate that radioactivity in airborne effluents is above preset limits, then releases are terminated.

Li uid Releases Some small amounts of radioactive material migrate into the primary coolant water. The primary coolant water is routed through a purification system to remove most of these particles; however, not all are removed. Some of the radioactive liquids may leak from pipes or valves in the system. These liquids are collected in floor

BFN Rad Impact Jan-June 1992 Page 2 of 72 and equipment drains and sumps. The collected liquids are then processed through a clean-up system, composed of storage tanks, recycling systems, and demineralizers, to remove contaminants. The purified water is then monitored to determine the amount of radioactive material remaining in the water prior to its release.

Steps are taken to ensure that the amount of radioactivity released to the environment is as low as reasonably achievable (ALARA). If the levels of radioactivity are above preset limits, the releases are circulated through the clean-up system again for additional processing. All radioactivity released from the plant into the Tennessee River is quantified prior to release.

Effluent Monitorin Plant paths through which radioactivity is released are monitored.

These monitors record the radiation levels for each release.

Monitors which are used for liquid releases will automatically alarm and stop any release which is above regulatory limits. Gaseous release monitors also provide alarming mechanisms to allow for the termination of any release above limits.

DOSE LIMITS The U.S. Nuclear Regulator Commission (NRC) requires nuclear power plants to be designed, built, and operated in such a way that the levels of radioactive material released into unrestricted areas is as low as reasonably achievable (ALARA). To ensure that this is done, the plant's operating license includes Technical Specifications which govern the release of radioactivity. These Technical Specifications specify limits for the release of radioactive effluents, as well as limits for doses to the general public from the release of these effluents. These limits are set well below the NRC 10CFR20 limits which govern the concentrations of radioactivity and exposures permissible in unrestricted areas. This ensures that radioactive effluent releases are ALARA.

The Technical Specification 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.

BFN Rad Impact Jan-June 1992 Page 3 of 72.

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

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

The Technical Specification 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 orequal to 75 mrem per year to the thyroid, and Less than or equal to 25 mrem per year to any other organ.

DOSE CALCULATIONS 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 calculation methods and results of the calculations are presented in the following sections.

BFN Rad Impact Jan-June 1992 Page 4 of 72 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 grounds 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.

The concentrations of radioactivity in the air and the soil are estimated by the computer model GELC which uses the actual meteorological conditions to determine the distribution of the effluents in the atmosphere. Again, as many of the parameters as possible are based on actual site specific data. The model that is used to estimate dose, as well as the parameters input to the model, is described in detail in Section 1.0 of the Browns Ferry Nuclear Plant Offsite Dose Calculation Manual.

Airborne Release Points and 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 sector in a particular range of wind speeds for a given stability class A through G. The wind speeds are divided into nine wind speed ranges. Calms are distributed by direction in proportion to the distribution of noncalm wind directions less than 0.7 m/s (1.5 mph). Stability classes are determined from the vertical temperature difference between two measurement levels.

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

BFN Rad Impact Jan-June 1992 Page 5 of 72 0 Releases from the turbine building are 'considered ground-level releases to determine the dispersion of the airborne effluents. The ground-level JFD is derived from windspeeds and directions measured 10 meters above ground and from the vertical temperature difference between 10 and 46 meters.

Releases from the radwaste and reactor buildings are considered split-level releases to determine the dispersion of the airborne effluents. This means that 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 91 meters.

Releases from the stack are considered elevated-level releases to determine the dispersion of the airborne effluents. 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.

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.

BFN Rad Impact Jan-June 1992 Page 6 of 72.

External Ex osure Dose Airborne Effluents Dose estimates for maximum external air exposures (gamma-air and beta-air doses) are made for points at and beyond the site boundary. The reported dose is chosen for the offsite location with the highest calculated exposure during the quarter. The doses calculated for Browns Ferry Nuclear Plant for each quarter are shown below.

Individual Doses from Airborne Effluents External Air Exposures (mrad)

Dose Location First uarter 1 2 Gamma Air dose 8.2E-04 mrad SE at 5600 meters Beta Air dose 3.3E-04 mrad SE at 5600 meters Second uarter 1 2 Gamma Air dose 2.3E-03 mrad NNW at 1650 meters Beta Air dose 3.9E-03 mrad NHW at 1650 meters

BFN Rad Impact Jan-June 1992 Page 7 of 72 Submersion Dose Airborne Effluents 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. The highest of these exposures 'is chosen and is assumed to be the maximum individual dose. The submersion doses calculated for Browns Ferry Nuclear Plant for each quarter are shown below.

Individual Doses from Airborne Effluents Submersion Exposures (mrem)

Dose Location First uarter 19 2 Total Body 1.2E-03 mrem SSE at 6706 meters Skin 1.7E-03 mrem SSE at 6706 meters Second uarter 1 2 6.4E-03 mrem NNW at 1524 meters Skin 1.7E-02 mrem NNW at 1524 meters

BFN Rad Impact Jan-June 1992 Page 8 of 72 Or an Dose Airborne Effluents Internal doses to organs due to releases of airborne effluents are estimated for the inhalation, ground contamin'ation, and ingestion pathways. The ingestion pathway is further divided into four possible contributing pathways: ingestion of cow/goat milk, ingestion of beef, and ingestion of vegetables. Doses are calculated based on the reported iodine and particulate releases. To determine the maximum organ dose, the dose contribution from the three pathways are summed for each receptor. For the ingestion dose, however, only those pathways that exist for each receptor are considered in the sum, i.e., milk ingestion doses are included only for locations where milk is consumed without commercial preparation and vegetable ingestion is included only for those locations where a garden is identified. To conservatively account for beef ingestion, a beef ingestion dose equal to that for the highest site boundary location is added to each identified receptor. For ground contamination, the dose added to the organ dose being calculated is the total body dose calculated for that location, i.e., it is assumed that the dose to an individual organ is equal to the total body dose. The organ doses calculated for Browns Ferry Nuclear Plant for each quarter are shown below.

Individual Doses from Airborne Effluents Maximum Organ (mrem)

Organ Age Group Dose First uarter 1 92 Thyroid Child ,6.0E-03 mrem Individual Pathway Contributions:

Vegetable Ingestion 1 2.7E-03 Beef Ingestion 2 6.1E-06 Inhalation 3.0E-03 Ground Contamination 1 3.1E-04 Milk Ingestion N/A Second uarter 19 2 Thyroid Child 1.7E-02 mrem Individual Pathway Contributions:

Vegetable Ingestion 3 8.3E-03 Beef Ingestion 7.6E-05 Inhalation3 7.8E-03 Ground Contamination 3 8.3E-04 Milk Ingestion N/A Maximum real receptor is located at 1829 meters in the NNW sector.

Calculated for the site boundary at 5600 meters in the SE sector.

Maximum real receptor is located at 1791 meters in the NNW sector.

Calculated for the site boundary at 1650 meters in the NNW sector.

BFN Rad Impact Jan-June 1992 Page 9 of 16 Dose Summa Airborne Effluents The table below gives a comparison of the calculated, quarterly doses to their respective limits.

Doses from Airborne Effluents First Half 1992 Browns Ferry Nuclear Plant Quarterly Percent o f Dose Pathway Quarter Dose Limit* Limit Airborne-Gamma Air Dose 1 8.2E-04 mrad 5 mrad 1 %

2 2.3E-03 mrad < 1%

Airborne-Beta Air Dose 1 3.3E-04 mrad 10 mrad 1 %

2 3.9E-03 mrad 1 %

Airborne-Max Organ Dose 1 6.0E-03 mrem 7.5 mrem < 1 %

2 1.7E-02 mrem < 1 %

• Since airborne releases are quantified on a per site basis, and the Technical Specification dose limits are given on a per unit basis, calculated airborne doses are initially compared to the per unit limit.

If this limit is exceeded, the release data is reanalyzed to determine which p'ortion of the releases were attributable to each reactor unit.

Then these per unit releases can be used to calculate per unit doses which are compared to the per unit dose limits.

As is shown by the table, all calculated quarterly doses were well below the allowable limits established in Browns Ferry's Technical Specifications.

BFN Rad Impact Jan-June 1992 Page 10 of 72 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,'he ingestion of fish caught in the Tennessee River, and direct exposure from radioactive material deposited in the river 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 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 the Browns Ferry Nuclear Plant Offsite Dose Calculation Manual.

Li uid Release Points and River Data 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. The average river flows past the plant site were 55,387 ft /s for the first quarter of 1992 and 25,320 ft /s for the second quarter.

Dose Estimates Li uid Effluents Doses are calculated for recreation, consumption of fish, and drinking water 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

BFN Rad Impact Jan-June Page ll of199272 (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 ~ater at the Champion Paper Company, consumes 21 kg (6.9 kg for a child) per year of 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 standing 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 below.

Individual Doses from Liquid Effluents (mrem)

Organ Age Group Dose First uarter 1 92 Total Body Adult 1.2E-02 mrem Individual Pathway Contributions:

Water Ingestion 8.8E-05 Fish Ingestion 8.8E-03 Recreation 2.7E-03 Liver Adult 1.7E-02 mrem Individual Pathway Contributions:

Water Ingestion 8.1E-05 Fish Ingestion 1.4E-02 Recreation 2.7E-03 Second uarter 19 2 Total Body Adult 4.7E-02 mrem Individual Pathway Contributions:

Water Ingestion 4.1E-04 Fish Ingestion 4.2E-02 Recreation 4.5E-03 Liver Teen 6.8E-02 mrem Individual Pathway Contributions:

Water Ingestion 3.2E-04 Fish Ingestion 6.4E-02 Recreation 4.5E-03

BFN Rad Impact Jan-June 1992 Page 12 of 72 Dose Summa Li uid Effluents The table below gives a comparison of the calculated liquid 'doses for the period to their respective quarterly limits.

Doses from Liquid Effluents First Half 1992 Browns Ferry Nuclear Plant Percent of Quarterly Quarterly Dose Pathway Quarter Dose Limit* Limit Liquid-Total Body Dose 1 1.2E-02 mrem 1.5 mrem 1  %

2 4.7E-02 mrem 3.1  %

Liquid-Max Organ Dose 1 1.7E-02 mrem 5 mrem 1  %

2 6.8E-02 mrem 1.4  %%d

• The quarterly limit used for liquid doses is the one-unit dose limit.

As is shown by the table, all calculated quarterly doses were well below the allowable limits established in Browns Ferry's Technical Specifications.

BFN Rad Impact Jan-June 1992 Page 13 of 72 POPULATION DOSES Population doses for highest exposed or'gan 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 below.

Browns Fer Nuclear Plant Po ulation Doses First Half 19 2 Total Body Dose Maximum Organ Dose (organ)

Liquid 8.3E-02 man-rem 1.3E-Ol man-rem (liver)

Airborne 4.6E-02 man-rem 6.6E-02 man-rem (thyroid)

Second Quarter 1992 Liquid 4.0E-Ol man-rem 6.0E-01 man-rem (liver)

Airborne 9.2E-02 man-rem 1.3E-01 man-rem (thyroid)

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

BFN Rad Impact Jan-June 1992 Page 14 of 72 DIRECT RADIATION O External gamma radiation levels were me'asured by thermoluminescent dosimeters (TLDs) deployed around BFN. The quarterly gamma radiation levels determined from these TLDs during this reporting period averaged approximately 18.4 mR/quarter at onsite stations and approximately 16.3 mR/quarter at offsite stations, or approximately 2.0 mR/quarter higher onsite than at offsite stations. This is consistent with levels reported at TVA's nonoperating 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.

e 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.

BFN Rad Impact Jan-June 1992 Page 15 of 72 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 the following section of this report.

Total Dose from Fuel Cycle Calendar Year 1992 Browns Ferry Nuclear Plant Dose First Second Third Fourth Quarter Quarter Quarter Quarter Total Bod or an Or an Dose (mrem)

(except thyroid)

Total body air submersion dose 1.2E-03 6.4E-03 O.OE-OO O.OE-OO Maximum organ dose (airborne) 6.0E-03 1.7E-02 O.OE-OO O..OE-OO Total body dose (liquid) 1.2E-02 4.7E-02 O.OE-OO O.OE-OO Maximum organ dose (liquid) 1.7E-02 6.8E-02 O.OE-OO O.OE-OO Direct radiation dose O.OE-OO O.OE-OO O.OE-OO O.OE-OO Total 3.6E-02 1.4E-01 O.OE-OO O.OE-OO Cumulative Total Dose (Total Body or other organ) mrem 1.8E-01 Total body air submersion dose 1.2E-03 6.4E-03 O.OE-OO O.OE-OO Thyroid dose (airborne) 6.0E-03 1.7E-02 O.OE-OO O.OE-OO Total body dose (liquid) 1.2E-02 4.7E-02 O.OE-OO O.OE-OO Thyroid dose (liquid) 3.9E-03 4.9E-03 O.OE-OO O.OE-OO Direct radiation dose O.OE-OO O.OE-OO O.OE-OO O.OE-OO Total (Thyroid) 2.3E-02 7.5E-02 O.OE-OO O.OE-OO Cumulative Total Dose (Thyroid) mrem 9.8E-02

BFN Rad Impact Jan-June 1992 Page 16 of 72 CONCLUSION As a result of operation of Browns Ferry Nuclear Plant for the first half of 1992, radioactive effluents were released to the atmosphere and the Tennessee River. The released radioactivity resulted in estimated potential doses to the public which are well below the Technical Specification Limits and Regulatory'uidance'. Cumulative doses for the calendar year are given below along with a comparison to the respective annual limits for the doses.

Cumulative Doses from Effluents Calendar Year 1992 Browns Ferry Nuclear Plant Percent of Annual Annual Dose Pathway Dose Limit Limit Airborne-Gamma air Dose 3.1E-03 mrad 10 mrad < 1%

Airborne-Beta air Dose 4.2E-03 mrad 20 mradl 1  %

Airborne-Max Organ Dose 2.3E-02 mrem 15 mrem < 1%

Liquid-Total Body Dose 5.9E-02 mrem 3 mrem 2  %

Liquid-Max Organ Dose 8.5E-02 mrem 10 mrem2 1  %

Total Dose Thyroid 9.8E-02 mrem 75 mrem < 1%

Total Dose Total Body or Organ other than Thyroid 1.8E-01 mrem 25 mrem < 1  %

Since airborne releases are quantified on a per site basis, and the Technical Specification dose limits are given on a per unit basis, calculated airborne doses are initially compared to the per unit limit.

If this limit is exceeded, the release data is reanalyzed to determine which portion of the releases were attributable to each reactor unit.

Then these per unit releases can be used to calculate per unit doses which are compared to the per unit dose limits.

The quarterly limit used for liquid doses is the one-unit dose limit.

BROWNS FERRY NUCLEAR PLANT FIRST HALF 1992 METEOROLOGICAL DATA

E Y I D DIRECTION FOR BFN Rad Imp STABILITY CLASS A (DELTA T( -1.9 C/100 Jan-June 19 M)

Page 17 of 72 BROWNS FERRY NUCLEAR PLANT JAN 1, 92 - MAR 31, 92 WIND WZND SPEED{MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAI N 0.0 0.0 0.0 0.0 0.0 0.510 0.0 0.0 0.0 0.510 NNE 0.0 0.0 0.0 0.051 0.0 0.408 0.0 0.0 0.0 0.459 NE 0.0 0.0 0.0 0.0 0.0 0.051 0.0 0.0 0.0 0 '51 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 0.0 ESE 0.0 0.0 0.0 0.153 0.0 0.0 0.0 0.0 0.0 0.153 SE 0 ' 0.0 0.0 0.408 0.204 0.0 0.0 0.0 0.0 0. 612 SSE 0.0 0.0 0.051 0.459 0. 051 0.0 0.0 0.0 0.0 0.561 S 0.0 0.0 0.204 0.408 0. 0. 0.0 0.0 0.0 0.0 0.612 SSW 0.0 0.0 0.0 0.153 0.102 0.051 0.0 0.0 0.0 0.306 SW 0.0 0.0 0.051 0.051 . 0.051 0.051 0.0 0.0 0.0 0.204 WSW 0 ' 0.0 0.051 0.0 0.0 0.0 0.0 0.0 0.0 0.051 W 0.0 0.0 0.0 0.051 0.051 0.0 0.0 0.0 0.0 0.102 WNW 0.0 0.0 0.0 0.0 0.0 0.051 0.0 0.0 0.0 0 '51 NW 0.0 0.0 0.0 0.0 0.0 0.153 0.051 0.0 0.0 0.204 NNW 0.0 0.0 0 ~0 0.0 0.0 0.153 0.0 0.0 0.0 0.153 SUBTOTAL 0.0 0.0 0.357 1.734 0.459 1.428 0.051 0.0 0.0 4.029 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 1994 TOTAL HOURS OF STABZLZTY CLASS A 79 TOTAL HOURS OF VALZD WIND DIRECTZON-WIND SPEED-STABILITY CLASS A 79 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1961 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: MET FACZLZTY 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 AND DIRECTION MEASURED AT THE 10.42 METER LEVEL DATE PRZNTED 04/30/92 MEAN WIND SPEED ~ 6.7 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

BFN Rad Im STABZLITY CLASS B (-1.9< DELTA-T<~-1.7 C/100 M)

Jan-June 19 Page 18 of 72 BROWNS FERRY NUCLEAR PLANT JAN 1, 92 - MAR 31, 92 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 N 0.0 0.0 0.0 0.0 0.051 0.051 0.0 0.0 0.0 0.102 HNE 0.0 0.0 0.0 0.102 0.153 0.204 0.051 0.0 0.0 0.510 NE 0.0 0.0 0.0 0.0 0.0 0.051 0.0 0.0 0.0 0.051 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 ' 0.102 0.102 0.0 0.0 0.0 0.0 0.204 ESE 0.0 0.0 0.0 0.102 0.051 0.0 0.0 0.0 0.0 0.153 SE 0.0 0.0 0.051 0.204 0.0 0.0 0.0 0.0 0.0 0.255 SSE 0.0 0.0 0.204 0.102 0.0 0.0 0.0 0.0 0.0 0.306 S 0.0 0.0 0.102 0.153 0.0 0.0 0.0 0.0 0.0 0.255 SSW 0.0 0.0 0.051 0.0 0.0 0.0 0.0 0.0 0.0 0.051 SW 0.0 0.0 0.051 0.051 0.0 0.051 0.0 0.0 0.0 0.153 WSW 0.0 0.0 0.0 0.153 0.0 0.0 0.0 0.0 0.0 0.153 W 0.0 0.0 0.0 0.051 0.102 0.0 0.0 0.0 0.0 0.153 WNW 0.0 0.0 0.0 0.051 0.102 0.306 0.0 0 ' 0.0 0.459 HW 0.0 0.0 0.0 0.0 0.051 0.357 0.204 0.0 0.0 0.612 NNW 0.0 0.0 0.0 0.051 0.051 0.102 0.0 0.0 0.0 0.204 SUBTOTAL 0.0 0.0 0.459 1.122 0.663 1 ~ 122 0.255 0.0 0.0 3.621 TOTAL HOURS OF VALID STABILITY OBSERVATZOHS 1994 TOTAL HOURS OF STABILITY CLASS B 72 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABII ITY CLASS B 71 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1961 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: MET FACZLZTY LOCATED 1.3 KM ESE OF BROWNS PERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DZRECTION MEASURED AT THE 10.42 METER LEVEL DATE PRINTED: 04/30/92 MEAN WIND SPEED M 7. 1 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED PROM UNROUNDED NUMBERS

BFN Rad Im STABILITY Cr.ASS C (-1.7( DELTA-T< -1.5 C/100 M)

Jan-June 19 Page 19 of 72 BROWNS FERRY NUCLEAR PLANT JAN 1, 92 - MAR 31, 92 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 0.051 0.0 0.051 0.0 0.0 0.0 0.102 NNE 0.0 0.0 0.0 0.0 0. 051 0.255 0. 051 0.0 0.0 0.357 NE 0.0 0.0 0.0 0.051 0.0 0.0 0.0 0.0 0.0 0.051 ENE 0.0 0.0 0.0 0.0 0.0 0. 051 0.0 0.0 0.0 0.051 E 0.0 0.0 0.0 0.051 0.0 0.0 0.0 0.0 0.0 0.051 ESE 0.0 0.0 0.0 0.051 0. 051 0.102 0.0 0.0 0.0 0.204 SE 0.0 0.0 0.0 0.102 0.051 0.0 0.0 0.0 0.0 0.153 SSE 0.0 0.0 0.204 0.102 0.0 0.0 0.0 0.0 0.0 0.306 S 0.0 0.0 0.051 0.051 0.0 0.0 0.0 0.0 0.0 0.102 SSW 0.0 0.0 0.153 0.102 0.0 0.0 0.0 0.0 0.0 0.255 SW 0.0 0.0 0.051 0.0 0.0 0.0 0.0 0.0 0.0 0.051 WSW 0.0 0.0 0.0 0.0 0.051 0.0 0.0 0.0 0.0 0.051 W 0.0 0.0 0.0 0.051 0.051 0.0 0.0 0.0 0.0 0.102 WNW 0.0 0.0 0.0 0.0 0.204 0.357 0.0 0.051 0.0 0.612 NW 0.0 0.0 0.0 0.0 0.102 0.306 0.153 0.0 0.0 0.561 NNW 0.0 0.0 0.0 0.0 0.051 0.204 0.0 0.0 0.0 0.255 SUBTOTAI 0.0 0.0 0.459 0.612 0.612 1.326 0.204 0.051 0.0 3.264 TOTAL HOURS OF VALID STABZLITY OBSERVATIONS 1994 TOTAL HOURS OP STABILITY CLASS C 64 TOTAL HOURS OF VALZD WIND DIRECTION-WIND SPEED-STABILITY CLASS C 64 TOTAL HOURS OF VALZD WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1961 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 AND DIRECTION MEASURED AT THE 10.42 METER LEVEL DATE PRZNTED: 04/30/92 MEAN WIND SPEED  % 7.5 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

BFN Rad Im Jan-June 1 STABILITY CLASS D (-1.5( DELTA-T<m-0.5 C/100 M) Page 20 of 72 BROWNS FERRY NUCLEAR PLANT JAN 1, 92 MAR 31, 92 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 '-24.4 >~24.5 TOTAL H 0.000 0.0 0.051 0.561 0.663 1. 479 0. 357 0.0 0.0 3.111 NNE 0. 001 0.051 0.102 0.459 0.357 0.969 0.357 0.0 0.0 2.296 NE 0.001 0.051 0.051 0.459 0.357 0.561 0.051 0.0 0.0 1.531 ENE 0.002 0.051 0.204 0.102 0.357 0.102 0.0 0.0 0.0 0.818 E 0.002 0.0 0.255 0.408 0. 102 0.0 0.0 0.0 0.0 0.767 ESE 0.005 0.051 0.510 0 '61 0.153 0.102 0.0 0.0 0.0 1.382 SE 0.010 0.102 0.969 0.663 0.306 0.051 0.0 0.0 0.0 2.101 SSE 0.005 0.0 0.510 0.510 0.102 0.051 0.0 0.0 0.0 1.178 S 0.007 0.051 0.663 0.612 0.204 0.102 0.0 0.0 0.0 1.638 SSW 0.004 0.051 0.357 0.408 0.0 0.0 0.0 0.0 0.0 0.820 SW 0.002 0.0 0.255 0.255 0.051 0.051 0.0 0.0 0.0 0.614 WSW 0.005 0.051 0.459 0.459 0.153 0.255 0.357 0.0 0.0 1.738 W 0.002 0.0 0.255 0.969 0.612 0.255 0.051 0.0 0.0 2.144 WNW 0.002 0.0 0.204 0.102 0.765 1.020 1.122 0.102 0.0 3.317 NW 0.001 0.0 0.102 0.306 0.408 1.938 1.785 0.306 0.0 4.845 NNW 0.001 0.0 0.153 0.306 0.255 1.887 0.510 0.0 0.0 3.112 SUBTOTAL 0.051 0.459 5.099 7.139 4.844 8.822 4.589 0.408 0.0 31.412 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 1994 TOTAL HOURS OF STABILZTY CLASS D 639 TOTAL HOURS OF VALID WIND DZRECTZON-WIND SPEED-STABILZTY CLASS D 616 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1961 TOTAL HOURS CALM 1 METEOROLOGICAL FACZLITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT

'2 '3 STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 10 WIND SPEED AND DIRECTION MEASURED AT THE 10 AND 45.30 METERS METER LEVEL DATE PRINTED: 04/30/92 MEAN WZND SPEED ~ 7.6 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

JOINT PERCENTAGE FREQUENCIES OF SPEED BY ZN DZRECTZ N F R BFN Rad Im STABZLZTY CLASS E (-0.5< DELTA-T<~ 1.5 C/100 M)

Jan-June 1 Page 21 of 72 BROWNS FERRY NUCLEAR PLANT JAN 1, 92 MAR 31, 92 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 0.009 0.102 0.867 0.612 0. 459 0.306 0.0 0.0 0.0 2.355 NNE 0.007 0.051 0.714 0.765 0.714 0.306 0.051 0.0 0.0 2.608 NE 0.005 0.102 0.459 0.714 0.204 0.255 0.0 0.0 0 ' 1.739 ENE 0.005 0.204 0.357 0.204 0.102 0. 051 0.0 0.0 0.0 0 ~ 923 E 0.011 0.153 0.969 0.816 0.204 0.0 0.0 0.0 0.0 2.152 ESE 0.013 0.102 1.224 0.867 0.255 0.0 0.0 0.0 0.0 2.460 SE 0.015 0.357 1.275 1.428 0.204 0.0 0.0 0.0 0.0 3.279 SSE 0.022 0.714 1.632 1.326 0.255 0.255 0.051 0 ~ 0 0.0 4.255 S 0.013 0.255 1.122 1.020 0.102 0 ~ 255 0.0 0.0 0.0 2.767 SSW 0.010 0.255 0.816 0.255 0.0 0.051 0. 051 0.0 0.0 1. 438 SW 0.011 0.510 0.612 0.357 0.051 0.102 0.051 0.0 0.0 1.693 WSW 0.005 0.204 0.357 0.561 0.051 0.102 0.051 0.0 0.0 1.331 W 0.006 0.102 0.561 0.612 0.255 0.102 0.0 0.0 0.0 1.638 WNW o.oo4 0.051 0.357 0.306 0.306 0.510 0.0 0.0 0.0 1.534 NW 0.007 0.153 0.612 0.306 0.357 0.357 0.0 0.0 0.0 1.792 NNW 0.009 0.153 0.765 0.765 0.918 0.459 0.0 0.0 0.0 3.068 SUBTOTAL 0.153 3.468 12.698 10.913 4.437 3.111 0.255 0.0 0.0 35.033 TOTAL HOURS OF VALID STABZLZTY OBSERVATIONS 1994 TOTAL HOURS OF STABZIITY CLASS E 690 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 687 TOTAL HOURS OF VALID WIND DZRECTZON-WIND SPEED-STABILITY OBSERVATIONS 1961 TOTAL HOURS CALM 3 METEOROLOGICAL FACZI ITY: 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 AND DIRECTION MEASURED AT THE 10.42 METER LEVEL DATE PRINTED: 04/30/92 MEAN WIND SPEED ~ 4.1 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

BFN Rad Im Jan-June 19 STABZLITY CLASS F 1. 5< DELTA-T<~ 4. 0 C/100 M)

(

Page 22 of 72 BROWNS FERRY NUCLEAR PLANT JAN 1, 92 MAR 31, 92 WIND WZND 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 >a24.5 TOTAL H 0.030 0.102 0.714 0.510 0.204 0.102 0.0 0.0 0.0 1.661 NNE 0.035 0.204 0.765 0.867 0.102 0.051 0.0 0.0 0.0 2 '24 NE 0.006 0.051 0.102 0.306 0.102 0.051 0.0 0.0 0.0 0.617 ENE 0.011 0.051 0.255 0.459 0.0 0.0 0.0 0.0 0.0 0.776 E 0.039 0.102 0 '69 0.714 0.0 0.0 0.0 0.0 0.0 1.824 ESE 0.050 0.153 1.224 0.102 0.0 0.051 0.0 0.0 0.0 1.580 SE 0.046 0.255 1.020 0.051 0.051 0.0 0.0 0.0 0.0 1.423 SSE 0.068 0 '08 1.479 0.306 0.153 0.0 0.0 0.0 0.0 0.0 2.414 S 0.028 0.102 0.663 0.306 0.153 0.0 0.0 0.0 1.252 SSW 0.006 0. 051 0.102 0.0 0.0 0.0 0.0 0.0 0.0 0.159 SW 0.0 0.0 0.0 0.051 0.0 0.051 0.0 0.0 0 ' 0.102 WSW 0.006 0.0 0 '53 0.051 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.210 0.102 W 0.0 0.0 0.0 0.102 0.0 0.0 0.0 WNW 0.006 0.0 0.153 0.102 0.0 0. 051 0.0 0.0 0.0 0.312 NW 0.018 0.051 0.459 0.153 0.102 0 F 051 0.0 0.0 0.0 0.834 NNW 0.009 0.0 0.255 0.714 0.510 0.0 0.0 0.0 0.0 1.488 SUBTOTAL 0.357 1.530 8.312 4.793 1.377 0.408 0.0 0.0 0.0 16.777 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 1994 TOTAL HOURS OF STABILZTY CLASS F 329 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABZLZTY CLASS F 329 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1961 TOTAL HOURS CALM 7 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 AND DIRECTION MEASURED AT THE 10.42 METER LEVEL DATE PRZHTED: 04/30/92 MEAN WIND SPEED ~ 3.2 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

BFN Rad Im Jan-June 1 STABILITY CLASS G (DELTA T > 4.0 C/100 M)

Page 23 of 72 BROWNS FERRY NUCLEAR PLANT JAN 1i 92 MAR 31'2 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 '-18.4 18.5-24 4 >~24.5 TOTAL N 0.019 0.051 0.204 0.102 0.0 0.0 0.0 0.0 0.0 0.376 NNE 0. 071 0.306 0.663 0.153 0.0 0.0 0.0 0.0 0.0 1.193 NE 0.011 0.102 0.051 0.051 0.0 0.0 0.0 0.0 0.0 0.215 ENE 0.015 0.0 0.204 0.0 0.0 0.0 0.0 0.0 0.0 0.219 E 0.022 0.051 0.255 0.051 0.0 0.0 0.0 0.0 0.0 0.379 ESE 0.033 0.102 0.357 0.0 0.0 0.0 0.0 0.0 0.0 0.492 SE 0.037 0.153 0.357 0.0 0.0 0.0 0.0 0.0 0.0 0.547 SSE 0.071 0.153 0.816 0. 051 0.0 0.0 0.0 0.0 0.0 1.091 S 0.026 0.255 0.102 0.0 0.051 0.0 0 ' 0.0 0.0 0.434 SSW 0.007 0.102 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0. 109 SW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 WSW 0.007 0.102 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.109 W 0.007 0.051 0.051 0.0 0.0 0.0 0.0 0.0 0.0 0.109 WNW 0.007 0.051 0.051 0.0 0.0 0.0 0.0 0.0 0.0 0.109 NW 0.011 0. 153 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0. 164 NNW 0.011 0. 051 0.102 0.153 0.0 0.0 0.0 0.0 0.0 0. 317 SUBTOTAL 0.357 1.683 3.213 0.561 0.051 0.0 0.0 0.0 0.0 5.864 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 1994 TOTAL HOURS OF STABILITY CLASS G 121 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 115 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1961 TOTAL HOURS CALM 7 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 WZND SPEED AND DIRECTION MEASURED AT THE 10.42 METER LEVEL DATE PRINTED: 04/30/92 MEAN WIND SPEED ~ 2.0 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

SPI IT JOINT BFN Rad Im Jan-June 1 STABILITY CLASS A (DE A T<~-1.9 C/100 M)

Page 24 of 72 BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAH 1, 92 - MAR 31, 92 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 0.082 0.0 0.0 0.0 0.082 NNE 0.0 0.0 0.0 0.0 0.0 0.059 0.0 0.0 0.0 0.059 NE 0.0 0.0 0.0 0.0 0.0 0.009 0.0 0.0 0.0 0.009 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 0.0 ESE 0.0 0.0 0.0 0.009 0.0 0.0 0.0 0.0 0.0 0.009 SE 0.0 0.0 0.0 0.022 0.021 0.0 0.0 0.0 0.0 0.043 SSE 0.0 0.0 0.0 0.024 0.011 0.0 0.0 0.0 0.0 0.035 S 0.0 0.0 0.003 0.008 0.0 0.0 0.0 0.0 0.0 0.011 SSW 0.0 0.0 0.0 0.006 0.019 0.022 0.0 0.0 0.0 0.047 SW 0.0 0.0 0.0 0.006 0.010 0.034 0.0 0.0 0.0 0.050 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 0.001 0.002 0.0 0.0 0.0 0.0 0.003 WNW 0.0 0.0 0.0 0.0 0.0 0.008 0.0 0.0 0.0 0.008 NW 0.0 0.0 0.0 0.0 0.0 0.026 0.010 0.0 0.0 0.037 NNW 0.0 0.0 0.0 0.0 0.0 0.026 0.0 0.0 0.0 0.026 SUBTOTAL 0.0 0.0 0.003 0.076 0.063 0.266 0.010 0.0 0.0 0.418 TOTAL HOURS OF VALID OBSERVATIONS 1966.000 TOTAL HOURS OF GROUND LEVEL RELEASE 212.240 TOTAL HOURS OF STABILITY CLASS A 8.210 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS A 8.210 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABZLITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WZND DIRECTION MEASURED AT 10.42 METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRINTED: 04/30/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

SPLIT JOZNT PERCENTAGE FREQUENCZE ND SPEED BY WIND DIRECTION FOR BFN mpact STABILITY CLASS B (-1.9< DELTA T<~-1.7 C/100 M)

Jan- 1992 Page 25 of 72 BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 92 - MAR 31, 92 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 ' >=24.5 TOTAL N 0.0 0.0 0.0 0.0 0.005 0.009 0.0 0.0 0.0 0.014 NNE 0.0 0.0 0.0 0.001 0.013 0.033 0 '10 0.0 0.0 0.056 NE 0.0 0.0 0.0 0.0 0.0 0.006 0.0 0.0 0.0 0.006 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 0.006 0.0 0.0 0.0 0.0 0.006 ESE 0.0 0.0 0.0 0.004 0.008 0.0 0.0 0.0 0.0 0.012 SE 0.0 0.0 0.0 0.013 0.0 0.0 0.0 0 ' 0.0 0.013 SSE 0.0 0.0 0.004 0.0 0.0 0.0 0.0 0.0 0.0 0.004 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 0.001 0.0 0.010 0.0 0.0 0.0 0.011 WSW 0.0 0.0 0.0 0.003 0.0 0.0 0.0 0.0 0.0 0.003 W 0.0 0.0 0.0 0.001 0.011 0.0 0.0 0.0 0.0 0.011 WNW 0.0 0.0 0.0 0.0 0.007 0.051 0.0 0.0 0.0 0.058 NW 0.0 0.0 0.0 0.0 0.003 0.053 0.044 0.0 0.0 0.101 NNW 0.0 0.0 0.0 0.0 0.003 0.014 0.0 0.0 0 ' 0.016 SUBTOTAL 0.0 0.0 0.004 0.021 0.055 0.176 0.054 0.0 0.0 0.310 TOTAL HOURS OF VALID OBSERVATIONS 1966.000 TOTAL HOURS OF GROUND LEVEL RELEASE 212.240 TOTAL HOURS OF STABILITY CLASS B 6.100 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS B 6.100, METEOROLOGICAL FACZLZTY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.42 METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRZNTED: 04/30/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

SPLIT JOINT PERCENTAGE FRE UENCIE IND SPEED BY WIND DIRECTION FOR BFN Rad Im Jan-June 1 STABILITY CLASS C (-1. DELTA T<~-1.5 C/100 M)

Page 26 of 7 BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 92 MAR 31, 92 WIND WIND SPEED(MPH)

DZRECTZON CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >~24.5 TOTAL N 0.0 0.0 0.0 0.0 0.0 0. 010 0.0 0.0 0.0 0.010 NNE 0.0 0.0 0.0 0.0 0.006 0.040 0.010 0.0 0.0 0.055 NE 0.0 0.0 0.0 0.001 0.0 0.0 0.0 0.0 0.0 0.001 ENE 0.0 0.0 0.0 0.0 0.0 0.006 0.0 0.0 0.0 0.006 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 0.007 0.018 0.0 0.0 0.0 0.025 SE 0.0 0.0 0.0 0.004 0.011 0.0 0 ' 0.0 0.0 0.015 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 0.005 0.0 0.0 0.0 0.0 0.0 0.0 0.005 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 0.006 0.0 0.0 0.0 0.0 0.006 W 0.0 0.0 0.0 0.002 0.006 0.0 0.0 0.0 0.0 0.008 WNW 0.0 0.0 0.0 0.0 0.011 0.048 0.0 0.038 0.0 0.097 NW 0.0 0.0 0.0 0.0 0.005 0.047 0.030 0.0 0.0 0.082 NNW 0.0 0.0 0.0 0.0 0.005 0.027 0.0 0.0 0.0 0.032 SUBTOTAL 0.0 0.0 0.005 0.007 0.054 0.196 0 '40 0.038 0.0 0.339 TOTAL HOURS OF VALID OBSERVATIONS 1966.000 TOTAL HOURS OF GROUND LEVEL RELEASE 212.240 TOTAL HOURS OF STABILITY CLASS C 9.550 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS C 6.670 METEOROLOGICAL FACILITY: MET FACZLITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.42 METER LEVEL WIND SPEED MEASURED AT 10 42 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 04/30/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

IN PERCENTAGE FREQUENCZE IND DI BFN Rad Imp Jan-June 19 STABZLITY CLASS D (-1. 5( DELTA T<~-0. 5 C/100 M) Page 27 of 72 BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 92 MAR 31, 92 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 0.008 0.063 0.252 0.074 0.0 0.0 0.398 NNE 0.0 0.0 0.0 0.012 0.040 0.161 0.100 0.0 0.0 0.313 NE 0.0 0.0 0.0 0.008 0.028 0.093 0.010 0.0 0.0 0.139 ENE 0.0 0.0 0.0 0.003 0.031 0.013 0.0 0.0 0.0 0.047 E 0.0 0.0 0.003 0.015 0.013 0.0 0.0 0.0 0.0 0.031 ESE 0.0 0.0 0.008 0.041 0.022 0.019 0.0 0.0 0.0 0.090 SE 0.0 0.0 0.020 0.060 0.055 0.009 0.0 0.0 0.0 0.143 SSE 0.0 0.0 0.023 0.076 0.030 0.009 0.0 0.0 0.0 0.138 S 0.0 0.0 0.015 0.056 0.035 0.046 0.0 0.0 0.0 0.152 SSW 0.0 0.0 0.015 0.041 0.007 0.0 0.0 0.0 0.0 0.063 SW 0.0 0.0 0.012 0.024 0.008 0.009 0.0 0.0 0.0 0.053 WSW 0.0 0.0 0.005 0.033 0.023 0.066 0.314 0.0 0.0 0.440 W 0.0 0.0 0.001 0.052 0.071 0.044 0.037 0.0 0.0 0.205 WNW 0.0 0.0 0.0 0.002 0.062 0.167 0.339 0.071 0.0 0.641 NW 0.0 0.0 0.0 0.008 0.024 0.325 0.537 0.244 0.0 1.138 NNW 0.0 0.0 0.0 0.004 0.028 0.323 0.105 0.0 0.0 0.460 SUBTOTAL 0.0 0.0 0.102 0.444 0.538 1.536 1. 515 0. 315 0.0 4. 450 TOTAL HOURS OF VALID OBSERVATIONS 1966.000 TOTAL HOURS OF GROUND LEVEL RELEASE 212. 240 TOTAI HOURS OF STABILITY CLASS D 917.700 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS D 87.480 METEOROLOGICAL FACILITY: MET FACZLZTY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10 03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10. 42 METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCITY ~ 12. 60 M/S DATE PRINTED: 04/30/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAZNED FROM UNROUNDED NUMBERS

BFN Rad Im Jan-June 19 STABZLZTY CLASS E (-0.5< DELTA T<~ 1.5 C/100 M)

Page 28 of 72 BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 92 MAR 31, 92 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 0.013 0.044 0.065 0.053 0.0 0.0 0.0 0 '74 NNE 0.0 0.0 0.015 0.061 0.097 0.054 0.017 0.0 0.0 0.244 NE 0.0 0.0 0.013 0.072 0.028 0.045 0.0 0.0 0.0 0.157 ENE 0.0 0.001 0.012 0.022 0.016 0.009 0.0 0.0 0.0 0.060 E 0.0 0.0 0.033 0.097 0.030 0.0 0.0 0.0 0.0 0.160 ESE 0.0 0.0 0.042 0.103 0.037 0.0 0.0 0.0 0.0 0.182 SE 0.0 0.001 0.083 0. 188 0.034 0.0 0.0 0.0 0.0 0.306 SSE 0.0 0.004 0.130 0.243 0.055 0.153 0.008 0.0 0.0 0.593 S 0.0 0.004 0.053 0.145 0.021 0.203 0.0 0.0 0.0 0.426 SSW 0.0 0.003 0.035 0.038 0.0 0.016 0.051 0.0 0.0 0.143 0.0 0.010 0.029 0.043 0.015 0.020 0.051 0.0 0.0 0.168 SW WSW 0.0 0.0 0.001 0.056 0.009 0.019 0.044 0.0 0.0 0 '30 W 0.0 0.0 0.025 0.057 0.040 0.020 0.0 0.0 0.0 0.143 WNW 0.0 0.0 0.010 0.029 0.039 0.085 0.0 0.0 0.0 0.163 NW 0.0 0.0 0.003 0.021 0.047 0.066 0.0 0.0 0.0 0.136 NNW 0.0 0.0 0.007 0.050 0.132 0.079 0.0 0.0 0.0 0.268 SUBTOTAL 0.0 0.021 0.503 1.270 0.664 0.823 0.171 0.0 0.0 3.452 TOTAL HOURS OF VALID OBSERVATIONS 1966.000 TOTAL HOURS OF GROUND LEVEL RELEASE 212.240 TOTAL HOURS OF STABZLITY CLASS E 776.500 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS E 67.870 METEOROLOGICAL FACILITY: MET FACZLZTY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.42 METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRZNTED: 04/30/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BFN Rad Imp Jan-June 19 STABILITY CLASS F ( 1- 5< DELTA T<~ 4. 0 C/100 M) of 72 Page 29 BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 92 MAR 31, 92 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >~24.5 TOTAL N 0.000 0.0 0.016 0. 051 0.032 0.020 0.0 0.0 0.0 0.119 NNE 0.000 0.0 0.021 0.101 0.016 0.010 0.0 0.0 0.0 0.148 NE 0.000 0.0 0.004 0.041 0.017 0.009 0.0 0.0 0.0 0.071 ENE 0.000 0.0 0.014 0.057 0.0 0.0 0.0 0.0 0.0 0.071 E 0.000 0.0 0.021 0.071 0.0 0.0 0.0 0.0 0.0 0.093 ESE 0.001 0.0 0.066 0.011 0.0 0.010 0.0 0.0 0.0 0.088 SE 0.001 0.001 0.068 0.009 0.021 0.0 0.0 0.0 0.0 0.100 SSE 0.004 0.009 0.180 0.081 0.067 0.0 0.0 0.0 0.0 0.340 S 0.002 0.007 0.072 0.054 0.036 0.0 0.0 0.0 0.0 0.170 SSW 0.000 ~ 0.0 0.006 0.0 0.0 0.0 0.0 0.0 0.0 0.006 SW 0.0 0.0 0.0 0 '10 0.0 0.026 0.0 0.0 0.0 0.0 0.0 0.036 0.025 WSW 0.000 0.0 0.017 0.007 0.0 0.0 0.0 W 0.0 0.0 0.0 0.013 0.0 0.0 0.0 0.0 0.0 0.013 WNW 0.000 0.0 0.003 0.010 0.0 0.009 0.0 0.0 0.0 0.022 NW 0.000 0.0 0.012 0.019 0.014 0.009 0.0 0.0 0.0 0.054 NNW 0.000 0.0 0.006 0.085 0.082 0.0 0.0 0.0 0.0 0.173 SUBTOTAL 0.010 0.017 0.505 0.621 0.283 0.094 0.0 0.0 0.0 1.529 TOTAL HOURS OF VALID OBSERVATIONS 1966.000 TOTAL HOURS OF GROUND LEVEL RELEASE 212.240 TOTAL HOURS OF STABILITY CLASS F 178.660 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS F 30.060 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DZRECTZON MEASURED AT 10.42 METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRINTED: 04/30/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUHBERS

BFN Rad Im Jan-June 1 STABILITY CLASS G (DELTA T > 4. 0 C/100 M)

Page 30 of 72 BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE JAN 1, 92 MAR 31, 92 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 l. 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 0.003 0.009 0.007 0.0 0.0 0.0 0.0 0.0 0.019 NNE 0.0 0.0 0.0 0.019 0.0 0.0 0.0 0.0 0.0 0.019 NE 0.0 0.0 0.0 0.007 0.0 0.0 0.0 0.0 0.0 0.007 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 0.004 0.008 0.0 0.0 0.0 0.0 0.0 0.012 ESE 0.0 0.0 0.010 0.0 0.0 0.0 0.0 0.0 0.0 0.010 SE 0.0 0.012 0.022 0.0 0.0 0.0 0.0 0.0 0.0 0.034 SSE 0.0 0.005 0.110 0.011 0.0 0.0 0.0 0.0 0.0 0.126 S 0.0 0.004 0.009 0.0 0.027 0.0 0.0 0.0 0.0 0.040 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 0.004 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.004 W 0.0 0.0 0.004 0.0 0.0 0.0 0.0 0.0 0.0 0.004 WNW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NW 0.0 0.003 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.003 NNW 0.0 0.0 0.0 0.021 0.0 0.0 0.0 0.0 0.0 0.021 SUBTOTAL 0.0 0.031 0.167 0.073 0.027 0.0 0.0 0.0 0.0 0.298 TOTAL HOURS OF VALID OBSERVATIONS 1966.000 TOTAL HOURS OF GROUND LEVEL RELEASE 212.240 TOTAL HOURS OF STABZLZTY CLASS G 69.280 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS G 5.850 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCIEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10. 42 METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRZNTED: 04/30/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAZNED FROM UNROUNDED NUMBERS

BFN Rad Im Jan-June 1 STABILITY CLASS A (DE T<~-1.9 C/100 M)

Page 31 of 72 BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 92 MAR 31, 92 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 0.0 0.0 0.0 0.0 0.0 NNE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NE 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 0.0 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 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 0.0 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 0.0 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 NNW 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 1966.000 TOTAL HOURS OF ELEVATED RELEASES 1753.760 TOTAL HOURS OF STABILITY CLASS A 8.210 TOTAL HOURS OF ELEVATED STABZLZTY CLASS A 0.0 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89.60 METERS WIND DIRECTION MEASURED AT 45.67 METER LEVEL WZND SPEED MEASURED AT 45.67 METER LEVEL EFFLUENT VEIOCITY = 12.60 M/S DATE PRINTED: 04/30/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

IN DZR TZ N FOR BFN Rad Em Jan-June 1 STABILITY CLASS B (-1. < DELTA T<~-1. 7 C/100 M)

Page 32 of 7 BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1 i 92 MAR 31 g 92 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 0.0 0.0 0.0 0.0 0.0 NNE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 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 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 0.0 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 0.0 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 0.0 NNW 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 1966.000 TOTAL HOURS OF ELEVATED RELEASES 1753.760 TOTAL HOURS OF STABII ITY CLASS B 6.100 TOTAL HOURS OF ELEVATED STABILITY CLASS B 0.0 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45 '0 WIND DZRECTZON MEASURED AT 45.67 METER LEVEL AND 89.60 METERS WIND SPEED MEASURED AT 45.67 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRINTED: 04/30/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

0

)

f

BFN Rad Im Jan-June j.

STABILITY CLASS C (-1. < DELTA T<~-1. 5 C/100 M) Page 33 of 7 BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 92 - MAR 31, 92 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 0.0 0.0 0.0 0.0 0.0 NNE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NE 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 0.0 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 0.051 0.051 0.0 0.0 0.0 0.0 0.102 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 0.0 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 0.045 0.0 0.0 0.0 0.045 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 0.0 NNW 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 0.051 0.051 0.045 0.0 0.0 0.0 0.146 TOTAL HOURS OF VALID OBSERVATIONS 1966.000 TOTAL HOURS OF ELEVATED RELEASES 1753.760 TOTAL HOURS OF STABILITY CLASS C 9.550 TOTAL HOURS OF ELEVATED STABILITY CLASS C 2.880 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89.60 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: 04/30/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

SPLZT JOZNT PERCENTAGE FRE UEN IND EE BFN Rad I Jan-June 1 STABZZ ITY CLASS D t- . DELTA T<=-0. 5 C/100 M) Page 34 of BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 92 MAR 31, 92 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 18.5-24.4 24.5 TOTAL N 0.001 0.0 0.051 0.509 0.341 1.378 1.368 0.040 0.0 3.689 NNE 0.002 0.0 0.102 0.458 0.886 2.188 1.371 0.166 0.0 5.173 NE 0.002 0.0 0.102 0.203 0.445 0.355 0.334 0.0 0.0 1.441 ENE 0.002 0.051 0.051 0.102 0.193 0.364 0.0 0.0 0.0 0.763 E 0.0 0.0 0.0 0.102 0.488 0.089 0.0 0.0 0.0 0.679 ESE 0.006 0.0 0.254 0.509 0.736 0.678 0.166 0.0 0.0 2.348 SE 0.002 0.0 0.102 0.712 0.392 0.942 0.662 0.072 0.0 2.885 SSE 0.008 0.102 0.254 0.254 0.292 0.357 1.033 0.162 0.0 2.462 S 0.007 0.0 0.305 0.356 0.490 0.534 0.417 0.032 0.005 2.144 SSW 0.005 0.0 0.203 0.153 0.191 0.940 0.250 0.099 0.007 1.847 SW 0.003 0.0 0.153 0.458 0.244 0.668 0.165 0.081 0.0 1.773 WSW 0.001 0.0 0.051 0.203 0.881 0.493 0.247 0.040 0.049 1.966 W 0.003 0.0 0.153 0.203 0.643 0.949 0.082 0.014 0.0 2.048 WNW 0.0 0.0 0.0 0.102 0.777 1.554 1.325 0.466 0.016 4.241 NW 0.003 0.051 0.102 0.102 0.489 0.967 2.191 0.489 0.015 4.409 NNW 0.003 0.0 0.153 0.407 0.391 1.630 1.739 0.039 0.0 4.362 SUBTOTAL 0.051 0.203 2.035 4.832 7.879 14.086 11.350 1.701 0.091 42.228 TOTAL HOURS OF VALID OBSERVATZONS 1966.000 TOTAL HOURS OF ELEVATED RELEASES 1753.760 TOTAL HOURS OF STABILITY CLASS D 917.700 TOTAL HOURS OF ELEVATED STABILITY CI ASS D 830.220 METEOROLOGICAL FACZLZTY: MET FACILITY LOCATED 1. 3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89 '0 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: 04/30/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

0 BY WIND DIRECTION FOR BFN Rad Im SPLIT JOINT PERCENTAGE FREQUENCIE ND SPEED Jan-June 1 STABILZTY CLASS E (-0. DELTA T<~ 1.5 C/100 M) Page 35 of BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 92 MAR 31, 92 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 0.002 0.051 0.102 0.712 0.340 0.620 0.124 0.0 0.0 1.951 NNE 0.005 0.0 0.356 0.305 0. 585 1.019 0.082 0.0 0.0 2.352 NE 0.003 0.153 0.051 0.407 0.837 1.257 0.168 0.0 0.0 2.875 ENE 0.001 0.0 0.051 0.102 0.295 0.409 0.042 0.0 0.0 0.899 E 0.004 0.051 0.254 0.407 0.342 0.754 0.0 0.0 0.0 1.813 ESE 0.001 0.0 0.102 0.509 0.932 1.260 0.0 0.0 0.0 2.804 SE 0.003 0.0 0.203 1.017 1.313 1.700 0.418 0.058 0.0 4.713 SSE 0.006 0.0 0.407 0.560 0.692 0.932 0.989 0.093 0.017 3.695 S 0.004 0.051 0.203 0.509 0.635 1.025 0.374 0.040 0.0 2.841 SSW 0.004 0.0 0.305 0.661 0.394 0 '49 0.123 0.0 0.0 1.937 SW 0.004 0.051 0.203 0.458 0.533 0.357 0.082 0.025 0.0 1.713 WSW 0.002 0.051 0.102 0.305 0.344 0.359 0.206 0.025 0.0 1.394 W 0.004 0.0 0.254 0.356 0.194 0.859 0.292 0.0 0.0 1.960 WNW 0.001 0.0 0.102 0.153 0.199 0.724 0.082 0.0 0.0 1.261 NW 0.001 0.0 0.102 0.203 0.148 0.627 0 '33 0.0 0.0 1.414 NNW 0.004 0.153 0.153 0.203 0.336 1.363 0.210 0.0 0.0 2.422 SUBTOTAL 0.051 0.560 2.950 6.867 8.117 13.716 3.526 0.241 0.017 36.044 TOTAL HOURS OF VALID OBSERVATIONS 1966.000 TOTAL HOURS OF ELEVATED RELEASES 1753.760 TOTAL HOURS OF STABILITY CLASS E 776 '00 TOTAL HOURS OF ELEVATED STABZI,ZTY CLASS E 708.630 METEOROLOGICAL FACIIITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89.60 METERS WIND DZRECTZON MEASURED AT 45 67 METER LEVEL WIND SPEED MEASURED AT 45.67 METER LEVEL EFFLUENT VELOCITY = 12-60 M/S DATE PRINTED: 04/30/92 NOTE TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

IT JO ERCENTAGE FRE UENCZE BFN Rad Im Jan-June 1 STABILITY CLASS F 1. DELTA T<= 4 ~ 0 C/100 M)

(

Page 36 of 7 BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 92 MAR 31 ~ 92 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 0.051 0.150 0.224 0.0 0.0 0.0 0 '25 NNE 0.0 0.0 0.0 0.0 0.051 0.085 0.0 0.0 0.0 0.136 NE 0.0 0.0 0.0 0.051 0.145 0.269 0.083 0.0 0.0 0.549 ENE 0.007 0.051 0.051 0.102 0.049 0.130 0.042 0.0 0.0 0.430 E 0.003 0.0 0.051 0.153 0.047 0.264 0.0 0.0 0.0 0.519 ESE 0.007 0.0 0.102 0.153 0.147 0.774 0.0 0.0 0.0 1 ~ 182 SE 0.007 0.051 0.051 0.407 0.636 0.321 0.0 0.0 0.0 1. 473 SSE 0.010 0.0 0.153 0.153 0.096 0.270 0.0 0.0 0.0 0.681 S 0.0 0.0 0.0 0.203 0.0 0.043 0.0 0.0 0.0 0.246 SSW 0.0 0.0 0.0 0.102 0.148 0 '91 0.0 0.0 0.0 0.340 SW 0.007 0.102 0.0 0.305 0.197 0.090 0.0 0.0 0.0 0 ~ 701 WSW 0.0 0.0 0.0 0.0 0.145 0.0 0.0 0.0 0.0 0.145 W 0.0 0.0 0.0 0.0 0.0 0.095 0.0 0.0 0.0 0.095 WNW 0.0 0.0 0.0 0.051 0.049 0.045 0.0 0.0 0.0 0.144 NW 0.003 0.0 0.051 0.0 0.0 0.0 0.0 0.0 0.0 0.054 NNW 0.007 0.0 0.102 0.102 0.051 0. 176 0.0 0.0 0.0 0.437 SUBTOTAI 0.051 0.203 0.560 1.831 1. 912 2.876 0.125 0.0 0.0 7. 558 TOTAL HOURS OF VALID OBSERVATIONS 1966.000 TOTAL HOURS OF ELEVATED RELEASES 1753.760 TOTAL HOURS OF STABILITY CLASS F 178.660 TOTAL HOURS OF ELEVATED STABILITY CLASS F 148.600 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1-3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILZTY BASED ON DELTA-T BETWEEN 45.30 AND 89.60 METERS WIND DIRECTION MEASURED AT 45.67 METER LEVEL WIND SPEED MEASURED AT 45.67 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRZNTED: 04/30/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BFN Rad Imp Jan-June 19 STABILITY CLASS G (DE T > 4.0 C/100 M) Page 37 of 7 BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE JAN 1, 92 - MAR 31, 92 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 >R24.5 TOTAL N 0.0 0.0 0.102 0.0 0.0 0 ' 0.0 0.0 0.0 0.102 NNE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NE 0.0 0.051 0.0 0.0 0.051 0.045 0.0 0.0 0.0 0.147 ENE 0.0 0.051 0.0 0.051 0.049 0.225 0.042 0.0 0.0 0. 418 E 0.0 0.0 0.102 0.0 0.0 0.044 0.0 0.0 0.0 0.145 ESE 0.0 0.0 0.153 0.203 0.098 0.0 0.0 0.0 0.0 0.454 SE 0.0 0.0 0.153 0.356 0.194 0.0 0.0 0.0 0.0 0.703 SSE 0.0 0.0 0.305 0.051 0.0 0.093 0.0 0.0 0.0 0.449 S 0.0 0.0 0.051 0.203 0.0 0.0 0.0 0.0 0.0 0.254 SSW 0.0 0.0 0.051 0.051 0.0 0.0 0.0 0.0 0.0 0.102 SW 0.0 0.0 0.102 0.0 0.099 0.0 0.0 0.0 0.0 0.200 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 0.051 0.051 0.0 0.0 0.0 0.0 0.0 0.102 WNW 0.0 0.0 0.051 0.0 0.048 0.0 0.0 0.0 0.0 0.099 NW 0.0 0.0 0.051 0.0 0.0 0.0 0.0 0.0 0.0 0.051 NNW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SUBTOTAL 0.0 0.102 1.170 0.966 0.539 0.407 0.042 0.0 0.0 3.226 TOTAL HOURS OF VAZ ID OBSERVATIONS 1966.000 TOTAL HOURS OF ELEVATED RELEASES 1753.760 TOTAL HOURS OF STABILITY CLASS G 69.280 TOTAL HOURS OF ELEVATED STABILITY CLASS G 63 '30 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89 '0 METERS WIND DIRECTION MEASURED AT 45 '7 METER LEVEZ WIND SPEED MEASURED AT 45.67 METER LEVEL EFFLUENT VELOCITY = 12.60 M/S DATE PRINTED: 04/30/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BFN Rad Imp Jan-June 1 STABILITY CLASS A ( DELT <=-1. 9 C/100 M) Page 38 of BROWNS FERRY NUCLEAR PLANT JAN 1, 92 MAR 31, 92 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 0.0 0.0 0.0 0.0 0.0 NNE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NE 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 0.0 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 0.0 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 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 0.0 NNW 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 TOTAL HOURS OF VALID STABILITY OBSERVATZONS 1995 TOTAL HOURS OF STABILITY CLASS A 0 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 0 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABZLZTY OBSERVATIONS 1979 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: MET FACZLITY LOCATED 1. 3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DZRECTION MEASURED AT THE 92.63 METER LEVEZ DATE PRINTED: 04/30/92 MEAN WIND SPEED ~ 0.0 MPH NOTE TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

BFN Rad Imp Jan-June 1 STABZI ITY CLASS B (-1 ~ 9 ELTA-T<~-1. 7 C/100 M) Page 39 of 7 BROWNS FERRY NUCLEAR PLANT JAN 1, 92>> MAR 31, 92 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 N 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NNE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NE 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 0.0 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 0.0 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 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 0.0 NNW 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 STABILITY OBSERVATIONS 1995 TOTAL HOURS OF STABILITY CLASS B 0 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABZLITY CLASS B 0 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1979 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON IAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 92.63 METER LEVEL DATE PRINTED: 04/30/92 MEAN WIND SPEED M 0.0 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

BFN Rad Imp Jan-June 1 STABZLZTY CLASS C t-1.7 ELTA-T<~-1.5 C/100 M) Page 40 of BROWNS FERRY NUCLEAR PLANT JAN 1, 92 - MAR 31, 92 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 0.0 0.0 0.0 0.0 0.0 NNE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NE 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 O.D 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 0.051 0.051 0.0 0.0 0.0 0.0 0.101 SSE 0.0 D.O 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 0.0 W 0.0 0.0 0.0 0.0 0.0 0.051 0.0 0.0 0.0 0.051 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 0.0 NNW 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 0.051 0.051 0. 051 0.0 0.0 0.0 0.152 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 1995 TOTAL HOURS OF STABILITY CLASS C 3 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 3 TOTAL HOURS OF VALID WIND DZRECTZON-WIND SPEED-STABILITY OBSERVATZONS 1979 TOTAL HOURS CALM 0 METEOROLOGICAL FACZLZTY: MET FACZLITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON IAPSE RATE MEASURED BETWEEN 45-30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 92.63 METER LEVEL DATE PRINTED: 04/30/92 MEAN WIND SPEED ~ 7.9 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

INT REQUENCIES OF BFN Rad Emp ERCE TAG PEED BY WIND DIRECTION FOR Jan-June 19 STABILITY CLASS D (-1.5 ELTA-T<~-0.5 C/100 M) Page 41 of BROWNS FERRY NUCLEAR PLANT JAN 1, 92 MAR 31, 92 WIND WIND SPEED(MPH)

DIRECTION CALM 0 '-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 0.404 0.303 1.314 2.021 0.505 0.0 4.548 NNE 0.0 0.0 0.051 0.152 0.556 1. 971 1.769 0.455 0.051 5.003 NE 0.0 0.0 0.0 0.303 0.303 0.758 0.455 0.0 0.0 1.819 ENE 0.0 0.051 0.051 0.051 0.152 0.404 0.0 0.0 0.0 0.707 E 0.0 0.0 0.051 0.152 0.303 0.303 0.051 0.0 0.0 0.859 ESE 0.0 0.051 0.101 0.505 0.202 l. 011 0.404 0.152 0.101 2.527 SE 0.0 0.0 0.152 o.4o4 0.253 0.556 0.910 0.707 0.051 3.032 SSE 0.0 0.051 0.152 0.253 0.354 0.202 1.011 0.707 0.0 2.729 S 0.0 0.0 0.202 0.051 0.101 0.556 0.657 0.051 0.0 l. 617 SSW 0.0 0.0 0.152 0.253 0.101 1.112 o.4ss 0.101 0.202 2.375 SW 0.0 0.0 0.101 0.152 0.152 0.657 0.758 0.253 0.152 2.223 WSW 0.0 0.0 0.202 0.202 0.404 0.960 0.505 0.202 0.404 2.880 W 0.0 0.051 0.152 0.051 0.404 1.364 0.303 0.202 0.051 2.577 WNW 0.0 0.0 0.051 0.101 0.556 1.263 1.971 1.213 0.606 5.760 NW 0.0 0.0 0.101 0.101 0.152 0.657 2.577 1.566 0.657 5.811 NNW 0.0 0.051 0.152 0.202 0.303 1.213 2.425 0.910 0.0 5.255 SUBTOTAL 0.0 0.253 1.668 3.335 4.598 14.300 16.271 7.024 2.274 49.722 TOTAL HOURS OF VALID STABILZTY OBSERVATIONS 1995 TOTAL HOURS OF STABILITY CLASS D 989 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 984 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1979 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: MET FACZLZTY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 92. 63 METER LEVEL DATE PRINTED- 04/30/92 MEAN WIND SPEED ~ 13.1 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

BFN Rad Imp JOINT PERCENTAGE F PEED BY WIND DIRECTION FOR Jan-June 1 STABZLITY CLASS E (-0.5< ELTA-T<~ 1.5 C/100 M) Page 42 of BROWNS FERRY NUCLEAR PLANT JAN 1, 92 MAR 31, 92 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7 ' 7 '-12 ' 12 '-18.4 18.5-24 ' )~24.5 TOTAL N 0.002 0.051 0.0 0.101 0.253 0.758 0.707 0.101 0 ' 1.973 NNE 0.005 0.051, 0.051 0.051 0.202 0.859 0.910 0.101 0.0 2.228 NE 0.0 0.0 0.0 0.152 0.556 0.960 1.162 0.202 0.0 3.032 ENE 0.005 0.051 0.051 0.101 0.101 0.910 0.505 0.101 0.0 1.824 E 0.010 0.051 0.152 0.152 0.101 0.606 0.202 0.0 0.0 1.273 0.007 0.101 0.051 0.303 0.101 0.859 1.061 0.253 0.0 2.736 ESE SE 0.015 0.051 0.253 0.505 0.253 1.263 l. 769 0.202 0.606 0.152

0. 051 4.461 4.962 SSE 0.010 0.0 0.202 0.303 0.354 1.566 1.870 S 0.005 0.0 0.101 0.202 0.051 0.859 1.162 0.253 0.101 2.734 SSW 0.010 0.0 0.202 0.0 0.202 1.061 0.556 0.152 0.0 2.183 SW 0.007 0.051 0.101 0.253 0.152 1.112 0.505 0.051 0.051 2.281 WSW 0.002 0.0 0. 051 0.051 0.303 0.808 0.404 0.303 0.051 1.973 W 0.005 0.0 0.101 0.101 0.101 0.303 0.960 0.152 0.051 1.773 WNW 0.012 0.051 0.202 0.101 0.152 0.303 0.556 0.101 0.0 1.478 NW 0.0 0.0 0.0 0.202 0.152 0.859 0.707 0.303 0.0 2.223 NNW 0.005 0.051 0.051 0.0 0.0 0.202 1.263 0.051 0.0 1.622 SUBTOTAL 0.101 0.505 1.566 2.577 3.032 13.290 14.300 2.931 0.455 38.757 TOTAL HOURS OF VALID STABILZTY OBSERVATIONS 1995 TOTAL HOURS OF STABILITY CLASS E 778 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 767 TOTAL HOURS OF VALZD WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1979 TOTAL HOURS CALM 2 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 92.63 METER LEVEL DATE PRINTED: 04/30/92 MEAN WIND SPEED ~ 11.9 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

JOI T PERCENTAGE F UE ES BFN Rad Em Jan-June 1 STABILITY CLASS F ( 1.5 LTA-T<~ 4.0 C/100 M) Page 43 of BROWNS FERRY NUCLEAR PLANT JAN 1, 92 - MAR 31, 92 WIND WZND 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 )5524,5 TOTAZ N 0.0 0.0 0.0 0.0 0.101 0.101 0.303 0.0 0.0 0.505 NNE 0.0 0.0 0.101 0.0 0.051 0.051 0.051 0.0 0.0 0.253 NE 0.0 0.0 0.101 0.0 0.0 0.101 0.202 0.253 0.0 0.657 ENE 0.0 0.0 0.0 0.051 0.0 0.202 0.051 0.152 0.0 0.455 E 0' 0.0 0.101 0.051 0.051 0.101 0.101 0.0 0.0 0.404 ESE 0.0 0.0 0.0 0.0 0.0 0.354 0.253 0.0 0.0 0.606 SE 0.0 0.0 0.0 0.0 0.101 0.505 0.910 0.051 0.0 1.566 SSE 0.0 0.0 0.051 0.0 0.253 0.253 0.404 0.0 0.0 0.960 S 0.0 0.0 0.051 0.051 0.101 0.303 0.303 0.0 0.0 0.808 SSW 0 ' 0.0 0.0 0.051 0.101 0.051 0.0 0.0 0.0 0.202 SW 0.0 0.0 0.0 0.0 0.101 0.051 0.354 0.0 0.0 0.505 WSW 0.0 0.0 0.0 0.0 0.0 0.303 0.152 0.0 0.0 0.4SS W 0.0 0.0 0.0 0.0 0.0 0. 101 0.051 0.0 0.0 0.152 WNW 0.0 0.0 0.0 0.0 0.0 0.152 0.0 0.0 0 ' 0.152 NW 0.0 0.0 0.051 0.0 0.0 0.152 0.051 0.0 0.0 0. 253 NNW 0.0 0.0 0.0 0.0 0.0 0.051 0.051 0.051 0.0 0.152 SUBTOTAL 0.0 0.0 0.455 0.202 0.859 2.830 3.234 0 F 505 0.0 8.085 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 1995 TOTAL HOURS OF STABZLZTY CLASS F 160 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 160 TOTAL HOURS OF VALID WIND DIRECTION-WZND SPEED-STABILITY OBSERVATIONS 1979 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1 ' KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 92.63 METER LEVEL DATE PRINTED: 04/30/92 MEAN WIND SPEED = 11.7 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

BFN Rad Im Jan-June 1 STABILITY CLASS G ( DELT > 4. 0 C/100 M) Page 44 of BROWNS PERRY NUCLEAR PLANT JAN 1, 92 - MAR 31, 92 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 '-18.4 18.5-24.4 >=24.5 TOTAL N 0.003 0.051 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0. 054 NNE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NE 0.003 0.051 0.0 0.051 0.0 0.0 0.0 0.0 0.0 0.104 ENE 0.0 0.0 0.0 0.0 0.0 0.051 0.0 0.0 0.0 0.051 E 0.003 0.0 0.051 0.101 0.101 0.051 0.202 0.0 0.0 0.508 ESE 0.0 0.0 0.0 0.051 0.0 0.0 0.101 0.0 0.0 0.152 SE 0.0 0.0 0.0 0.0 0.0 0.101 0.051 0.0 0.0 0.152 SSE 0.006 0.051 0.051 0.0 0.0 0.101 0.202 0.0 0.0 0. 410 S 0.0 0.0 0.0 0.0 0.051 0.101 0.101 0.0 0.0 0.253 SSW 0.009 0.101 0.051 0.051 0.0 0.0 0.0 0.0 0.0 0.211 SW 0. 018 0.051 0.253 0.253 0.101 0.202 0.0 0.0 0.0 0.877 WSW 0.006 0.0 0. 101 0.051 0.0 0.101 0.0 0.0 0.0 0.259 W 0.003 0.0 0.051 0.0 0.0 0.0 0.0 0.0 0.0 0.054 WNW 0.0 0.0 0.0 0.0 0.0 0.051 0.0 0.0 0.0 0.051 NW 0.0 0.0 0.0 0.0 0.0 0.101 0.0 0.0 0.0 0.101 NNW 0.0 0.0 0.0 0.0 0.0 0.051 0.0 0.0 0.0 0.051 SUBTOTAL 0.051 0.303 0.556 0.556 0.253 0.910 0.657 0.0 0.0 3.284 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 1995 TOTAL HOURS OF STABILITY CLASS G 65 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABZLITY CLASS G 65 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 1979 TOTAL HOURS CALM 1 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 HETERS WIND SPEED AND DIRECTION MEASURED AT THE 92.63 METER LEVEL DATE PRINTED: 04/30/92 MEAN WIND SPEED ~ 7.5 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

JOINT PERCENTAGE FREQUENCIES OF SPEED BY WIND DIRECTION FOR BFN Rad Impa STABILITY CLASS A -1.9 C/100 Jan-June 19 tDEL M)

Page 45 of BROWNS FERRY NUCLEAR PLANT APR 1, 92 - JUN 30, 92 WIND WIND SPEED t MPH)

DIRECTION CALM 6 . 6-1. 6 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.0 0.0 0.0 0.0 0.047 0.703 0.422 0.0 0.0 1.172 NNE 0.0 0.0 0.0 0.0 0.0 0.563 0.516 0.0 0.0 1.078 NE 0.0 0.0 0.0 0.0 0.0 0.188 0.0 0.0 0.0 0.188 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 0.328 0.188 0. 047 0.0 0.0 0.0 0.563 SE 0.0 0.0 0.328 0.563 0.0 0.0 0.0 0.0 0.0 0.891 SSE 0.0 0.0 0.516 0.656 0.047 0.0 0.0 0.0 0.0 1 ~ 219 S 0.0 0.0 0.234 -0. 703 0.094 0.0 0.0 0.0 0.0 1.031 SSW 0.0 0.0 0.047 0.094 0.047 0.0 0.0 0.0 0.0 0.188 SW 0.0 0.0 0.094 0.141 0.0 0.0 0.0 0.0

• 0.0 0.234 WSW 0.0 0.0 0.0 0.047 0.094 0.188 0.0 0.0 0.0 0.328 W 0.0 0.0 0 ~0 0.0 0.0 0.094 0.0 0.0 0.0 0.094 WNW 0.0 0.0 0.0 0.0 0.0 0.047 0.141 0.0 0.0 0.188 NW 0.0 0.0 0.0 0.0 0.047 0.703 0.563 0.0 0.0 1.313 NNW 0.0 0.0 0.0 0.0 0.0 0.469 0.0 0.0 0.0 0.469 SUBTOTAL 0.0 0.0 1.219 2.532 0.563 3.000 1.641 0.0 0.0 8.955 TOTAL HOURS OF VAIZD STABZLITY OBSERVATIONS 2182 TOTAI HOURS Of STABII ITY CLASS A 194 TOTAL HOURS OF VALZD WIND DIRECTION-WZND SPEED-STABILITY CLASS A 191 TOTAI HOURS OF VALID WIND DIRECTION-WIND SPEED-STABZI ZTY OBSERVATIONS 2133 TOTAL HOURS CALM 0 METEOROLOGZCAL 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 AND DIRECTION MEASURED AT THE 10.42 METER LEVEL DATE PRZNTED: 07/23/92 MEAN WIND SPEED = 8.1 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

JOINT PERCENTAGE FREQUENCIES OF SPEED BY WIND DIRECTION FOR BFN Rad Imp STABILITY CLASS B (-1 ~ TA-T<a 1. 7 C/100 M)

Jan-June 19 Page 46 of BROWNS FERRY NUCLEAR PZANT APR 1 ~ 92 JUN 30 i 92 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 ' >>24.5 TOTAL N 0.0 0.0 0.0 0.047 0.0 0.234 0. 047 0.0 0.0 0.328 NNE 0.0 0.0 0.0 0.094 0.094 0.047 0 '94 0 ' 0.0 0.328 NE 0.0 0.0 0.0 0.0 0.0 0.094 0 '94 0.0 0.0 0.188 ENE 0.0 0.0 0.0 0.0 0.047 0.0 0.0 0.0 0 ~ 0 0.047 E 0.0 0' 0.0 0.0 0.047 0.047 0.0 0.0 0.0 0.094 ESE 0 ' 0.0 0.0 0.188 0.094 0 ~ 0 0 ' 0.0 0.0 0.281 SE 0 ~0 0.0 0.422 0.141 0.047 0.0 0.0 0.0 0.0 0.609 SSE 0.0 0.0 0.375 0.188 0.0 0.0 0 ' 0 ' 0.0 0.563 S 0.0 0.0 0.047 0.141 0.047 0.0 0.0 0.0 0.0 0.234 SSW 0.0 0 ' 0.094 0.141 0.0 0.0 0' 0.0 0.0 0.234 SW 0.0 0.0 0.094 0.141 0.0 0.0 0 ~ 0 0.0 0.0 0.234 WSW 0.0 0. 0. 0.047 0.469 0.141 0.0 0.0 0.0 0.0 0.656 W 0.0 0' 0.0 0.047 0.047 0.188 0.0 0 ~ 0 0.0 0.281 WNW 0.0 0.0 0.0 0.047 0.047 0.188 0.094 0.0 0 ~ 0 0.375 NW 0.0 0.0 0.0 0.0 0.094 0.656 0.141 0.047 0.0 0.938 NNW 0.0 0.0 0.0 0.0 0.094 0.281 0.047 0.0 0.0 0.422 SUBTOTAL 0.0 0.0 1.078 1.641 0.797 1.735 0.516 0.047 0 ~ 0 5.813 TOTAL HOURS OF VALZD STABILITY OBSERVATIONS 2182 TOTAL HOURS OF STABILITY CLASS B TOTAL HOURS OF VAZ ID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 124 TOTAL HOURS OF VALID WIND DIRECTION-MIND SPEED-STABILITY OBSERVATIONS 2133 TOTAL HOURS CALM METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 10.03 AND'5.30 METERS WIND SPEED AND DIRECTION MEASURED AT THE 10. 42 METER LEVEL DATE PRINTED: 07/23/92 MEAN WIND SPEED ~ 6.8 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

JOINT PERCENTAGE FREQUENCIES OF SPEED BY WIND DIRECTION FOR BFN Rad imp STABILITY CLASS C (-1. TA-T<m-I 5 C/100 M) Jan-June 19 BROWNS FERRY NUCLEAR PLANT Page 47 of APR 1, 92 JUN 30, 92 WIND WZND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5>>3.4 3.5-5.4 5.5-7.4 7.5-12 ' 12 '-18 ' 18 '-24 ' >~24.5 TOTAL N 0.0 0.0 0.0 0.0 0.0 0.188 0.047 0.0 0.0 0.234 NNE 0.0 0.0 0.0 0.0 0.188 0.047 0.0 0.0 0.0 0.234 NE 0.0 0.0 0.0 0.047 0.094 0.141 0.047 0.0 0.0 0.328 ENE 0.0 0.0 0.0 0.0 0.0 0.094 0.0 0.0 0.0 0.094 E 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 ' 0.0 0 '

ESE 0.0 0.0 0.047 0.094 0.047 0.0 0.0 0.0 0.0 0.188 SE 0.0 0.0 0.938 0.094 0.0 0' 0.0 0.0 0.0 1.031 SSE 0.0 0.0 0.469 0.047 0.0 0.0 0.0 0.0 0.0 0.516 S 0.0 0.0 0.328 0.234 0.0 0' 0.0 0.0 0.0 0.563 SSW 0.0 0.0 0.141 0.188 0.0 0 ' 0.0 0 ' 0.0 0.328 SW 0 ~ 0 0.0 0.188 0.188 0~0 0 ' 0.0 0.0 0.0 0. 375 WSW 0.0 0.0 0.0 0.234 0.047 0 '94 0.0 0.0 0.0 0.375 W 0 ~ 0 0.0 0.0 0.234 0.234 0.094 0.0 0.0 0.0 0.563 WNW 0.0 0.0 0.0 0.047 0.328 0.094 0.0 0.0 0.0 0.469 NW 0 ' 0.0 0.0 0.094 0.563 0.422 0.188 0.0 0.0 1.266 NNW 0.0 0.0 0.0 0.047 0.047 0.422 0.0 0 ' 0.0 0. 516 SVBTOTAI 0.0 0.0 2.110 1.547 1.547 1.594 0.281 0.0 0.0 7.079 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2182 TOTAL HOURS OF STABILITY CLASS C 153 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 151 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2133 TOTAL HOURS CAIM 0 METEOROLOGICAL FACILITY: MET FACII ITY 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 AND DIRECTION MEASURED AT THE 10. 42 METER LEVEL DATE PRINTED: 07/23/92 MEAN WIND SPEED ~ 5.8 MPH NOTE: TOTALS AND SVBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

0 JOINT PERCENTAGE FREQUENCIES OF SPEED BY WIND DIRECTION FOR BFN Rad Im STABILITY CLASS D (-1. TA-T<=-0. 5 C/100 M) Jan-June 1 BROWNS FERRY NUCLEAR PLANT Page 48 of 7 APR 1, 92 - JUN 30, 92 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 0.002 0.094 0.281 0.469 0.985 1.031 0.094 0.047 0.0 3.002 NNE 0.001 0.047 0.281 0.141 0.422 0.656 0.234 0.047 0.0 1.830 NE 0.001 0.0 0.328 0.328 0.422 0.422 0.0 0.0 0.0 1.502 ENE 0.002 0.047 0.422 0.234 0.328 0.141 0.0 0.0 0.0 1.174 E 0.004 0.094 0.797 1.313 0.563 0.047 0.0 0.0 0.0 2.817 ESE 0.003 0.047 0.703 1.078 0.609 0.234 0.0 0.0 0.0 2.676 SE 0.007 0.047 1.594 0.844 0.375 0.047 0.0 0.0 0.0 2.914 SSE 0.007 0.094 1.594 0.891 0.094 0.094 0.0 0.0 0.0 2.773 S 0.005 0.188 0.985 0.797 0.0 0.0 0.0 0.0 0.0 1.974 SSW 0.003 0.047 0.563 0.188 0.047 0.0 0.0 0.0 0.0 0.847 SW 0.003 0.047 0.609 0.234 0.047 0.0 0.0 0.0 0.0 0.941 WSW 0.004 0.0 0.938 0.891 0.234 0. 141 0.0 0.0 0.0 2.208 W 0. 001 0.0 0.234 0.985 0.844 0.188 0.0 0.0 0.0 2.251 WNW 0.001 0.0 0.141 0.844 0.375 0.328 0.0 0.0 0.0 1.688 NW 0.001 0.0 0.141 0.328 0.656 0 '50 0.094 0.0 0.0 1.970 NNW 0.001 0.0 0.328 0.563 0.469 1.125 0.234 0.0 0.0 2 '21 SUBTOTAL 0.047 0.750 9.939 10.127 6.470 5.204 0.656 0.094 0.0 33.286 TOTAL HOURS OF VAI ZD STABILITY OBSERVATZONS 2182 TOTAL HOURS OF STABILITY CLASS D 723 TOTAL HOURS OF VALID WIND DIRECTION-WZND SPEED-STABILITY CLASS D 710 TOTAI HOURS OF VALID WZND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2133 TOTAI HOURS CALM 1 METEOROLOGZCAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PIANT STABILITY BASED ON IAPSE RATE MEASURED BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT THE 10.42 METER LEVEL DATE PRINTED 07/23/92 MEAN WIND SPEED = 5.1 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

JOINT PERCENTAGE FREQUENCIES OF W SPEED BY WIND DIRECTION POR STABILITY CLASS E (-0 ~ TA-T<55 1.S C/100 M)

BFN Rad Im Jan-June 19 BROWNS PERRY NUCLEAR PLANT Page 49 of 72 APR 1 3 92 JVN 305 92 WIND WIND SPEED(MPH)

DIRECTION CAIM 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 N 0.010 0.141 0.563 0.703 0.656 0.234 0.047 0.0 0.0 2.354 NNE 0.008 0.047 0.516 0.375 0. 656 0.422 0.047 0.0 0.0 2.070 NE 0.008 0.094 0.516 0.469 0.047 0.141 0.0 0.0 0.0 1 ~ 274 ENE 0.009 0.047 0.609 0.281 0.0 0.0 0.0 0.0 0.0 0.947 E 0. 018- 0.141 1.172 1.360 0.094 0.0 0.0 0.0 0.0 2.784 ESE 0.024 0.516 1.266 1.453 0.141 0.0 0.0 0.0 0.0 3.400 SE 0.022 0.422 1. 219 1.172 0.094 0.0 0.0 0.0 0.0 2.929 SSE 0.019 0.563 0.844 0.563 O.O94 0.0 0.0 0 ~ 0 0.0 2.082 S 0.015 0.469 0.656 0.609 0.0 0.0 0.0 0.0 0.0 1.750 SSW 0.007 0.0 0.516 0.094 0.0 0.0 0.0 0.0 0.0 0.616 SW 0.010 0.188 0.563 0.0 0.0 0.0 0.0 0.0 0.0 0.760 WSW 0.015 0.141 0.985 0.328 0.094 0.047 0.0 0.0 0.0 1 ~ 609 W 0.006 0.047 0.422 0.141 0.0 0.0 0.0 0.0 0.0 0.616 WNW 0.001 0.047 0.047 0.188 0.094 0.047 0.0 0.0 0.0 0.423 NW 0.004 0.094 0.234 0.188 0.094 0.094 0.0 0.0 0.0 0.708 NNW 0.010 0. 141 0.563 0.516 0.469 0.281 0.0 0.0 0.0 1.979 SUBTOTAL 0.188 3.094 10.689 8.439 2. 532 1.266 0.094 0.0 0.0 26.301 TOTAL HOURS OF VALID STABZLITY OBSERVATIONS 2182 TOTAL HOURS OF STABZLZTY CLASS E 581 TOTAL HOURS OF VALID WIND DIRECTZON-WIND SPEED-STABII ITY CLASS E 561 TOTAI HOURS OF VALID WIND DIRECTION-WIND SPEED-STABZIZTY OBSERVATIONS 2133 TOTAL HOURS CALM 4 METEOROLOGZCAL FACILITY: MET FACILITY LOCATED 1 ~ 3 KM ESE OF BROWNS PERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT THE 10.42 METER LEVEL DATE PRINTED: 07/23/92 MEAN WIND SPEED = 3.6 MPH NOTE: TOTAIS AND SVBTOTALS ABOVE ARE OBTAINED FROM UNROVNDED NVMBERS ~

J JOINT PERCENTAGE FREQUENCIES OF 'PEED BY WIND DIRECTION FOR STABILITY CLASS F ( 1 LTAT<m 4.0 C/100 M)

BFN Rad Im BROWNS FERRY NUCLEAR PLANT Jan-June 1992 APR 1 ~ 92 JUN 30 '2 Page 50 of 72 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 5.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 TOTAL N 0.024 0.047 0.563 0.703 0.047 0.0 0.0 0.0 0.0 1.383 NNE 0.007 0.047 0.141 0.516 0.141 0.094 0.0 0.0 0.0 0.945 NE 0.022 0.094 0.469 0.141 0.047 0.047 0.0 0.0 0.0 0.819 ENE 0.020 0.094 0.422 0.188 0.0 0.0 0.0 0.0 0.0 0.723 E 0.044 0.234 0.891 0.375 0.0 0.0 0.0 0.0 0.0 1.544 ESE 0.035 0.375 0.516 0.0 0.0 0.0 0.0 0.0 0.0 0.925 SE 0.035 0.375 0.516 0.047 0.0 0.0 0.0 0.0 0.0 0.972 SSE 0.029 0.328 0.422 0.094 0.0 0.0 0.0 0.0 0.0 0.873 S 0.027 0.234 0.469 0.328 0.0 0.0 0.0 0.0 0.0 1.059 SSW 0.005 0.0 0.141 0.0 0.0 0.0 0.0 0.0 0.0 0.146 SW 0.002 0.0 0.047 0.047 0.0 0.0 0.0 0.0 0.0 0.096 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. 047 0.0 0.0 0.0 0.0 0.047 WNW 0.002 0.0 0.047 0.047 0.0 0.0 0.0 0.0 0.0 0.096 NW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NNW 0.029 0.094 0.656 0.094 0.047 0.0 0.0 0.0 0.0 0.920 SUBTOTAL 0.281 1.922 5.298 2.579 0.328 0.141 0.0 0.0 0 ~ 0 10.549 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2182 TOTAL HOURS OF STABILITY CZASS F 228 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 225 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABZLITY OBSERVATIONS 2133 TOTAL HOURS CALM 6 METEOROLOGZCAZ FACILITY: MET FACILITY LOCATED 1-3 KM ESE OF BROWNS FERRY NUCLEAR PZANT STABZZ ZTY BASED ON LAPSE RATE MEASURED BETWEEN 10.03 AND 45 '0 METERS WIND SPEED AND DIRECTION MEASURED AT THE 10.42 METER LEVEL DATE PRINTED: 07/23/92 MEAN WIND SPEED ~ 2 ' MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS 4

'f JOINT PERCENTAGE FREQUENCIES OF SPEED BY WZND DIRECTION FOR BFN Rad STABILITY CLASS (DE 4 0 C/100 M)

G 1'an-June l

BROWNS FERRY NUCLEAR PLANT Page Sl of 72 APR 1, 92 - JUN 30, 92 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 0.178 0.750 1.266 0.422 0.0 0.0 0.0 0 ~ 0 0.0 2.616 NNE 0.058 0.188 0.469 0.328 0.0 0.0 0.0 0.0 0.0 1.042 NE 0.029 0.188 0.141 0.0 0.0 0.0 0.0 0 ' 0.0 0.357 ENE 0.054 0.234 0.375 0.141 0.0 0.0 0.0 0.0 0.0 0.804 E 0.029 0.094 0.234 0.0 0.0 0.0 0.0 0.0 0.0 0.357 ESE 0.025 0.141 0.141 0 ~0 0.0 0.0 0.0 0 ' 0.0 0.306 SE 0.021 0.094 0.141 0.0 0.0 0.0 0.0 0.0 0.0 0.255 SSE 0.058 0.469 0.188 0.0 0.0 0.0 0.0 0' 0.0 0.714 S 0.012 0.0 0.141 0.0 0.0 0.0 0.0 0.0 0.0 0.153 SSW 0.008 0.047 0.047 0.0 0.0 0.0 0.0 0.0 0.0 0.102 SW 0.004 0.0 0.047 0.0 0.0 0.0 0.0 0 ' 0.0 0.051 WSW 0.008 0.047 0.047 0.0 0.0 0.0 0.0 0.0 0.0 0.102 W 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 WNW 0.004 0.047 0.0 0 0 0.0 0.0 0.0 0.0 0.0 0. 051 NW 0.017 0.188 0.0 0.0 0.0 0.0 0.0 0,0 0.0 0.204 NNW 0.058 0.328 0.328 0. 141 0.047 0.0 0.0 0 ~ 0 0.0 0.902 SUBTOTAL 0.563 2.813 3.563 1.031 0.047 0.0 0.0 0.0 0.0 8.017 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2182 TOTAL HOURS OF STABILITY CLASS G 175 TOTAL HOURS OF VAI ZD WIND DIRECTION-WIND SPEED-STABILITY CI ASS G 171 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2133 TOTAL HOURS CALM 12 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCIEAR PIANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 10.03 AND 45.30 METERS WIND SPEED AND DIRECTION MEASURED AT THE 10.42 METER LEVEL DATE PRINTED: 07/23/'92 MEAN WIND SPEED ~ 2.0 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS ~

e BFN Rad Imp IRE TZ N FOR Jan-June 1 STABILITY CLASS A (DEL T<~-1.9 C/100 M) Page 52 of BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 92 JUN 30, 92 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 >424.5 TOTAL N 0.0 0.0 0.0 0.0 0.002 0.113 0.114 0.0 0.0 0.229 NNE 0.0 0.0 0.0 0.0 0.0 0.097 0.226 0.0 0.0 0.323 NE 0.0 0.0 0.0 0.0 0.0 0.029 0.0 0.0 0.0 0.029 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 0.0 ESE 0.0 0.0 0.0 0.019 0.028 0.007 0.0 0.0 0.0 0.055 SE 0.0 0.0 0.013 0.035 0.0 0.0 0.0 0.0 0.0 0.047 SSE 0.0 0.0 0.022 0.058 0.020 0.0 0.0 0.0 0.0 0.101 S 0.0 0.0 0.009 0.044 0.037 0.0 0.0 0.0 0.0 0.091 SSW 0.0 0.0 0.001 0.007 0.009 0 ~ 0 0.0 0.0 0.0 0.018 SW 0.0 0.0 0.0 0.014 0.0 0.0 0.0 0.0 0.0 0. 014 WSW 0.0 0.0 0.0 0.007 0.011 0.034 0.0 0.0 0.0 0.052 W 0.0 0.0 0.0 0.0 0.0 0.016 0.0 0.0 0.0 0.016 WNW 0.0 0.0 0.0 0 ' 0.0 0.006 0.033 0.0 0.0 0.039 NW 0.0 0.0 0.0 0.0 0.004 0.110 0.156 0.0 0.0 0.271 NNW 0.0 0.0 0.0 0.0 0.0 0.081 0.0 0.0 0.0 0.081 SUBTOTAL 0.0 0.0 0.045 0.185 0.112 0.493 0.529 0.0 0.0 1.365 TOTAL HOURS OF VALID OBSERVATIONS 2138. 000 TOTAL HOURS OF GROUND LEVEL RELEASE 182.490 TOTAL HOURS OF STABILITY CLASS A 29.190 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS A 29.190 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.42 METER LEVEL WZND SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRINTED: 07/23/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

0 L J ZNT E EN G R EN IES N BFN Rad Imp Jan-June 19 STABILITY CLASS B (-1 '< DELTA T<=-1.7 C/100 M) Page 53 of 7 BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 92 JVN 30, 92 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.S TOTAL N 0.0 0.0 0.0 0.0 0.0 0.036 0.009 0.0 0.0 0.045 NNE 0.0 O.D 0.0 0.000 0.009 0.009 0.026 0.0 0.0 0.044 NE 0.0 0.0 0.0 0.0 0.0 0.017 0.018 0.0 0.0 0.035 ENE 0.0 0.0 0.0 0.0 0.004 0.0 0.0 0.0 0.0 0.004 E 0.0 0.0 0.0 0.0 0.003 0.006 0.0 0.0 0.0 0.009 ESE 0.0 0.0 0.0 0.024 0.018 0.0 0.0 0.0 0.0 0.042 SE 0.0 0.0 0.010 0.008 0.007 0.0 0.0 0.0 0.0 0.025 SSE 0.0 0.0 0.019 0.007 0.0 0.0 0.0 0.0 0.0 0.027 S 0.0 0.0 0.002 0.001 0.009 0.0 0.0 0.0 0.0 0.012 SSW 0.0 0.0 0.0 0.004 0.0 0.0 0.0 0.0 0.0 0.004 SW 0.0 0.0 0.0 0.006 0.0 0.0 0.0 D.o 0.0 0.006 WSW 0.0 0.0 0.0 0.008 0.014 0.0 0.0 0.0 0.0 0.022 W 0.0 0.0 0.0 0.002 o.oo4 0. 030 0.0 0.0 0.0 0.036 WNW 0.0 0.0 0.0 0.000 0.003 0.024 0.024 0.0 0.0 0.052 NW 0.0 0.0 0.0 0.0 0.007 0.089 0.045 0.030 0.0 0.172 NNW 0.0 0.0 0.0 0 ' 0.007 0.042 0.009 0.0 0.0 0.057 SUBTOTAL 0.0 0.0 0.031 0.061 O.DSS 0.254 0.131 0.030 0.0 0.591 TOTAL HOURS OF VALID OBSERVATIONS 2138.000 TOTAL HOURS OF GROUND LEVEL RELEASE 182.490 TOTAL HOURS OF STABILITY CLASS B 12.640 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS B 12.640'ETEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10. 03 AND 45. 30 METERS WIND DZRECTZON MEASURED AT 10 '2 METER LEVEL WIND SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCITY 12.60 M/S DATE PRINTED: 07/23/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM VNROVNDED NUMBERS

BFN Rad Imp

-1.5 C/100 Jan-June 19 STABZLITY CLASS C (-1. < DELTA T< M)

Page 54 of 72 BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 92 - JUN 30, 92 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 3 . 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 0.029 0.022 0.0 0.0 0 F 051 NNE 0.0 0.0 0.0 0.0 0.013 0.007 0.0 0.0 0.0 0.019 NE 0.0 0.0 0.0 0.0 0.006 0.020 0.009 0.0 0.0 0.034 ENE 0.0 0.0 0.0 0.0 0.0 0.012 0.0 0.0 0.0 0.012 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 0.003 0.007 0.0 0.0 0.0 0.0 0.010 SE 0.0 0.0 0.009 0.007 0.0 0.0 0.0 0.0 0.0 0.016 SSE 0.0 0.0 0.001 0.008 0.0 0.0 0.0 0.0 0.0 0.009 S 0.0 0.0 0.0 0.022 0.0 0.0 0.0 0.0 0.0 0.022 SSW 0.0 0.0 0.0 0.007 0.0 0.0 0.0 0.0 0.0 0.007 SW 0.0 0.0 0.002 0.006 0.0 0.0 0.0 0.0 0.0 0.008 WSW 0.0 0.0 0 ' 0.005 0.005 0.016 0.0 0.0 0.0 0.027 W 0.0 0.0 0.0 0.000 0.020 0.016 0.0 0.0 0.0 0.037 WNW 0.0 0.0 0.0 0.0 0.021 0.013 0.0 0.0 0.0 0.034 NW 0.0 0.0 0.0 0.000 0.035 0.062 0.041 0.0 0.0 0.138 NNW 0.0 0.0 0.0 0.0 0.002 0.068 0.0 0.0 0.0 0.070 SUBTOTAL 0.0 0.0 0.012 0.060 0.109 0.242 0.072 0.0 0.0 0.495 TOTAL HOURS OF VALID OBSERVATIONS 2138.000 TOTAL HOURS OF GROUND LEVEL RELEASE 182.490 TOTAL HOURS OF STABILITY CLASS C 13.250 TOTAL HOURS OF GROUND LEVEL STABZLITY CLASS C 10.590 METEOROLOGICAL FACILITY: MET FACILZTY LOCATED 1 ~ 3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DEZTA-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: 07/23/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

e SPLIT JOINT PERCENTAGE FREQUENCIES ND SPEED BY WIND DIRECTION FOR BFN Rad Imp Jan-June 1 STABILITY CLASS D t- DELTA T<~-0.5 C/100 M) Page 55 of BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1 ~ 92 JUN 30 i 92 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 '-18.4 18.5-24.4 >>24.5 TOTAL N 0.0 0.0 0.0 0.007 0.104 0.174 0.019 0.035 0.0 0.340 NNE 0.0 0.0 0.001 0.006 0.046 0.112 0.063 0.043 0.0 0.270 NE 0.0 0.0 0 ' 0.007 0.042 0.064 0.0 0.0 0.0 0.113 ENE 0.0 0.0 0.000 0.006 0.035 0.021 0.0 0.0 0.0 0.062 E 0.0 0.0 0.007 0.090 0.067 0.008 0.0 0.0 0.0 0.173 ESE 0.0 0.0 0.005 0.105 0.099 0.043 0.0 0.0 0.0 0.253 SE 0.0 0.0 0.036 0.097 0.094 0.009 0.0 0.0 0.0 0.237 SSE 0.0 0.0 0.062 0.146 0.046 0.078 0.0 0.0 0.0 0.333 S 0.0 0.0 0.029 0. 119 0.0 0.0 0.0 0.0 0.0 0.148 SSW 0.0 0.0 0.020 0.014 0.009 0.0 0.0 0.0 0.0 0.044 SW 0.0 0.0 0.006 0.014 0.008 0.0 0.0 0.0 0.0 0.029 WSW 0.0 0.0 0.013 0.038 0.036 0.024 0.0 0.0 0.0 0.111 W 0.0 0.0 0.0 0.029 0.087 0.029 0.0 0.0 0.0 0.145 WNW 0.0 0.0 0.0 0.008 0.029 0.044 0.0 0.0 0.0 0.081 NW 0.0 0.0 0 ' 0.001 0.044 0.115 0. 019 0.0 0.0 0.179 NNW 0.0 0.0 0.0 0.017 0.050 0.186 0.050 0.0 0.0 0.302 SUBTOTAL 0.0 0.0 0 ~ 180 0.708 0.797 0.906 0.151 0.078 0.0 2.819 TOTAL HOURS OF VALID OBSERVATIONS 2138.000 TOTAL HOURS OF GROUND LEVEL RELEASE 182.490 TOTAL HOURS OF STABZLZTY CLASS D 1178.160 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS D 60.260 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WZND DZRECTION MEASURED AT 10.42 METER LEVEL WZND SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRINTED: 07/23/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BFN Rad Em Jan-June 1 STABILITY CLASS E (-0. < DELTA T<m 1.5 C/100 M) Page 56 of BROW)IS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 92 - JUN 30, 92 WIND WIHD SPEED(MPH)

DIRECTZON CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5 'l.-4 7.5-12.4 12.5-18.4 18.5-24.4 >~24.5 TOTAL N 0.0 0.003 0.007 0.077 0.097 0.041 0.014 0.0 0.0 0.239 NNE 0.0 0.0 0.001 0.035 0.094 0.075 0.010 0.0 0.0 0.215 NE 0.0 0.0 0. 012 0.044 0.007 0.023 0.0 0.0 0.0 0.087 ENE 0.0 0.0 0.023 0.029 0.0 0.0 0.0 0.0 0.0 0.052 E 0.0 0.003 0.029 0.139 0.014 0.0 0.0 0.0 0.0 0.184 ESE 0.0 0.004 0.056 0.156 0.020 0.0 0.0 0.0 0.0 0.236 SE 0.0 0.0 0.099 0.203 0.012 0.0 0.0 0.0 0.0 0.314 SSE 0.0 0.007 0.065 0.129 0.059 0 ' 0.0 0.0 0.0 0.260 S 0.0 0.019 0.046 0.105 0.0 0.0 0.0 0.0 0.0 0.169 SSW 0.0 0.0 0.040 0.015 0.0 0.0 0.0 0.0 0.0 0.055 SW 0.0 0.000 0.012 0.0 0.0 0 ~ 0 0.0 0.0 0.0 0.013 WSW 0.0 0.0 0.032 0. 041 0.015 0.008 0.0 0.0 0.0 0.096 W 0.0 0.002 0.009 0.010 0.0 0.0 0.0 0.0 0.0 0.021 WNW 0.0 0.0 0.0 0.013 0.012 0.008 0.0 0.0 0.0 0.033 NW 0.0 0.0 0.003 0.006 0.013 0 '14 0.0 0.0 0.0 0.036 NNW 0.0 0.0 0.008 0. 051 0.069 0 F 050 0.0 0.0 0.0 0.178 SUBTOTAL 0.0 0.038 0.442 1.053 0.413 0.220 0.023 0.0 0.0 2.189 TOTAL HOURS OF VALID OBSERVATZONS 2138.000 TOTAL HOURS OF GROUND LEVEL RELEASE 182.490 TOTAL HOURS OF STABILITY CLASS E 647.730 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS E 46.800 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10.42 METER LEVEL WIND SPEED MEASURED AT 10-42 METER LEVEL EFFLUENT VELOCITY 55 12.60 M/S DATE PRINTED: 07/23/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

SPLIT JOZNT PERCENTAGE FREQUENCIES ND SPEED BY WIND DIRECTION FOR BFN Rad Zm STABILITY CLASS F t 1. 5< DELTA T<~ 4 ~ 0 C/100 M)

Jan-June 19 Page 57 of 72 BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 92 JUN 30, 92 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 0.036 0.086 0.008 0.0 0.0 0.0 0.0 0.130 NNE 0.0 0.0 0.0 0.055 0.022 0.017 0.0 0.0 0.0 0.095 NE 0.0 0.0 0.022 0. 017 0.007 0.008 0.0 0.0 0.0 0.055 ENE 0.0 0.0 0.021 0.017 0.0 0.0 0.0 0.0 0.0 0.038 E 0.0 0.012 0.021 0.033 0.0 0.0 0.0 0.0 0.0 0.065 ESE 0.0 0.010 0.014 0.0 0.0 0.0 0.0 0.0 0.0 0.024 SE 0.0 0.019 0.023 0.009 0.0 0.0 0.0 0.0 0.0 0.051 SSE 0.0 0.005 0.035 0.018 0.0 0.0 0.0 0.0 0.0 0.058 S 0.0 0.017 0.038 0.059 0.0 0.0 0.0 0.0 0.0 0.115 SSW 0.0 0.0 0.004 0.0 0.0 0.0 0.0 0.0 0.0 0.004 SW 0.0 0.0 0.0 0.005 0.0 0.0 0.0 0.0 0.0 0.005 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 0.006 0.0 0.0 0.0 0.006 WNW 0.0 0.0 0.0 0 F 005 0.0 0.0 0.0 0.0 0.0 0.005 NW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NNW 0.0 0.0 0.041 0.012 0.007 0.0 0.0 0.0 0.0 0.061 SUBTOTAL 0.0 0.063 0.255 0.316 0.051 0.026 0.0 0.0 0.0 0. 711 TOTAL HOURS OF VALID OBSERVATIONS 2138.000 TOTAL HOURS OF GROUND LEVEL RELEASE 182.490 TOTAL HOURS OF STABILITY CLASS F 196.400 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS F 15.210 METEOROLOGICAL FACILITY: MET FACII ITY LOCATED 1 ~ 3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10 '3 WIND DIRECTION MEASURED AT 10.42 METER LEVEL AND 45 '0 METERS WIND SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCZTY = 12.60 M/S DATE PRINTED: 07/23/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

QUE E N PEE B IND DI T N FOR BFN Rad Imp STABILITY CLASS G {DEL T > 4.0 C/100 M)

Jan-June 19 Page 58 of 72 BROWNS FERRY NUCLEAR PLANT PART 1 OF 2 GROUND LEVEL RELEASE MODE APR 1, 92 JUN 30, 92 WIND WIND SPEED(MPH)

DIRECTION CALM 0 '-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 0.003 0.0 0.039 0.056 0.0 0.0 0.0 0.0 0.0 0.098 NNE 0.002 0.0 0.021 0.049 0.0 0.0 0.0 0.0 0.0 0.071 NE 0.000 0.0 0.002 0.0 0.0 0.0 0.0 0.0 0.0 0.003 ENE 0.001 0.0 0.007 0. 017 0.0 0.0 0.0 0.0 0.0 0.024 E 0.000 0.0 0.004 0.0 0.0 0.0 0.0 0.0 0.0 0.005 ESE 0.001 0.008 0.005 0.0 0.0 0 ' 0.0 0.0 0.0 0.014 SE 0.001 0.011 0.006 0.0 0.0 0.0 0.0 0.0 0.0 0.018 SSE 0.005 0.034 0 '30 0.0 0.0 0' 0.0 0.0 0.0 0.069 S 0.001 0.0 0.015 0.0 0.0 0.0 0.0 0.0 0.0 0.016 SSW 0. 001 0.005 0.004 0.0 0.0 0 ' 0.0 0.0 0.0 0.009 SW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 WSW 0.000 0.0 0.005 0.0 0.0 0.0 0.0 0.0 0.0 0.005 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 NNW 0.000 0.0 0.002 0.022 0.008 0.0 0.0 0.0 0.0 0.032 SUBTOTAL 0.016 0.058 0.139 0.144 0.008 0.0 0.0 0.0 0.0 0.365 TOTAL HOURS OF VALID OBSERVATIONS 2138. 000 TOTAL HOURS OF GROUND LEVEL RELEASE 182.490 TOTAL HOURS OF STABILITY CLASS G 60.630 TOTAL HOURS OF GROUND LEVEL STABILITY CLASS G 7.800 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 10.03 AND 45.30 METERS WIND DIRECTION MEASURED AT 10. 42 METER LEVEL WZND SPEED MEASURED AT 10.42 METER LEVEL EFFLUENT VELOCITY 12.60 M/S DATE PRINTED: 07/23/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

SPLIT JOINT PERCENTAGE FREQUENCIES D DIRECTION FOR BFN Rad Im Jan-June 1 STABILITY CLASS A (DELTA T<~-1.9 C/100 M)

Page 59 of 72 BROWHS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 92 JUN 30, 92 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 0.0 0.0 0.0 0.0 0.0 NNE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NE 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 0.0 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 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 0.0 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 0.0 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 NNW 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 TOTAL HOURS OF VALID OBSERVATIONS 2138.000 TOTAL HOURS OF ELEVATED RELEASES 1955.510 TOTAL HOURS OF STABILITY CLASS A 29.190 TOTAL HOURS OF ELEVATED STABZl ITY CLASS A 0.0 METEOROLOGICAL FACZLITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45430 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.67 METER LEVEL WIND SPEED MEASURED AT 45.67 METER LEVEL EFFLUENT VELOCITY = 12460 M/S DATE PRINTED: 07/23/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BFN Rad Im SPLIT JOINT PERCENTAGE PREQUENCZE IND SPEED BY WIND DIRECTION FOR Jan-June 1 STABILITY CLASS B (- DELTA T<~-1.7 C/100 M) Page 60 of BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 92 - JUN 30, 92 WIND WIND SPEED(MPH)

DZRECTZON CALM 0 '-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >>24.5 TOTAL N 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NNE 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 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 0.0 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 0.0 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 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 0.0 NNW 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 VALZD OBSERVATIONS 2138.000 TOTAL HOURS OF ELEVATED RELEASES 1955. 510 TOTAL HOURS OF STABILITY CLASS B 12.640 TOTAL HOURS OF ELEVATED STABILITY CLASS B 0.0 METEOROLOGICAL FACILITY: MET FACZLZTY LOCATED 1.3 KM ESE OF BROWNS PERRY NUCZ EAR 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 EPFLVENT VELOCITY ~ 12.60 M/S DATE PRZNTED'7/23/92 NOTE: TOTALS AND SUBTOTAZS ARE OBTAINED PROM UNROUNDED NUMBERS

SPLIT JOINT PERCENTAGE FREQUENCIES ND SPEED BY WIND DIRECTION FOR BFN Rad Im STABILITY CLASS C ( < DELTA T<~-1.5 C/100 M)

Jan-June 1 Page 61 of 72 BPOWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 92 - JUN 30, 92 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 X.i-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18 ' 18.5-24.4 >+24.5 TOTAL N 0.0 0.0 0 ' 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NNE 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 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 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 0.0 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 ' 0.047 0.0 0.0 0.0 0.0 0.0 0.047 WSW 0.0 0.0 0.0 0.0 0.0 0.039 0.038 0.0 0.0 0.078 W 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 0.0 NNW 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 0.047 0 ~ 0 0.039 0.038 0.0 0.0 0.124 TOTAL HOURS OF VALID OBSERVATIONS 2138.000 TOTAL HOURS OF ELEVATED RELEASES 1955.510 TOTAL HOURS OF STABILITY CLASS C 13.250 TOTAL HOURS OF ELEVATED STABILZTY CLASS C 2.660 METEOROLOGICAL FACILITY: MET FACZLITY LOCATED 1 ' KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89.59 METERS WIND DZRECTION MEASURED AT 45.67 METER LEVEL WIND SPEED MEASURED AT 45.67 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRZNTED: 07/23/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAZNED FROM UNROUNDED NUMBERS

SPLIT JOINT PERCENTAGE FREQUENCIES ND SPEED BY WZND ZRECTZON F R BFN Rad Im STABILZTY CLASS D (-1.5( DELTA T( -0.5 C/100 M) Jan-June 1 Page 62 of 72 BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 92 JUN 30, 92 WIND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.6-3.'4 3.5-5.4 5.5-7.4 7.5 12.4 12.5-18-4 18-5-24 ' >~24.5 TOTAL N 0.004 0.094 0.187 0.421 0.493 1.702 1.143 0.151 0.0 4.193 NNE 0.004 0.0 0.281 0.374 0.401 1.222 1.184 0.414 0.004 3.885 NE 0.003 0.0 0.234 0.281 0.271 0.697 0.422 0.0 0.0 1.908 ENE 0.003 0.047 0. 187 0.140 0.046 0.455 0.0 0.0 0.0 0.879 E 0.004 0.0 0.327 0 F 234 0.493 0.543 0.0 0.0 0.0 1.601 ESE 0.006 0.047 0.421 0.795 1.080 1.856 0.0 0.0 0.0 4.205 SE 0.022 0.094 1.590 1.029 0.539 1.625 1.253 0.187 0.0 6.339 SSE 0. 011 0.094 0.795 0.795 0.453 0.928 1.216 0.200 0.015 4.507 S 0. 010 0.0 0.748 0.187 0.546 0.485 0.954 0. 019 0.0 2.949 SSW 0.007 0.047 0.514 0 ~ 421 0.229 0.657 0.191 0.0 0.0 2.066 SW 0.005 0.094 0.327 0.608 0.585 0.495 0. 114 0.0 0.0 2.229 WSW 0.006 0.047 0.421 0.982 0.812 0.577 0.425 0.0 0.0 3.270 W 0.001 0.0 0.094 0 '95 0.677 1.288 0.228 0.033 0.0 3.116 WNW 0.002 0.0 0.140 0.655 0.719 0.997 0.076 0.032 0.0 2.621 NW 0.002 0 '47 0.094 0.374 l. 079 1.919 1.412 0. 212 0.0 5.138 NNW 0.004 0.047 0.234 0.187 0.359 1.215 1.302 0.036 0.0 3.382 SUBTOTAL 0.094 0.655 6.595 8.279 8.782 16. 660 9.920 1.283 0.020 52.286 TOTAL HOURS OF VALID OBSERVATIONS 2138.000 TOTAL HOURS OF ELEVATED RELEASES 1955.510 TOTAL HOURS OF STABILITY CLASS D 1178.160 TOTAL HOURS OF ELEVATED STABILITY CLASS D 1117.900 METEOROLOGICAL FACILITY: MET FACZLZTY ZOCATED 1.3 KM ESE OF BROWNS FERRY NUCIEAR 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 ZEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRINTED 07/23/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BFN Rad imp I P E Y ZND DIRECTION FOR Jan-June 1 STABILITY CLASS E t-0 ~ DELTA T<= 1.5 C/100 M) Page 63 of BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 92 - JUN 30, 92 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 0.002 0.0 0.187 0.374 0.637 1.442 0.232 0.0 0.0 2.875 NNE 0.002 0.0 0.140 0.281 0.410 1. 159 0. 153 0.0 0.0 2.146 NE 0.001 0.0 0.094 0.094 0.226 0.576 0.155 0.0 0.0 1.145 ENE 0.001 0.0 0.047 0.234 0.501 0.417 0.0 0.0 0.0 1.199 E 0.002 0.0 0.187 0.608 0.635 0.666 0.039 0.0 0.0 2.137 ESE 0.003 0.0 0.234 0.374 0.890 1.333 0.0 0.0 0.0 2.834 SE 0.009 0.047 0.702 0.889 0.904 0.750 0.190 0.0 0.0 3.490 SSE 0.004 0.0 0.281 0.748 0.412 0.664 0.528 0.058 0.0 2.695 S 0.006 0.047 0.468 0. 561 0. 310 0.333 0.192 0.0 0.0 1.917 SSW 0.004 0.047 0.234 0.281 0.224 0.696 0.076 0.0 0.0 1.561 SW 0.002 0.0 0.187 0.655 0.179 0.585 0.077 0.0 0.0 1.685 WSW 0.002 0.0 0.140 0.374 0.227 0.290 0.0 0.0 0.0 1.034 W 0.003 0.047 0.187 0.327 0.180 0.084 0.0 0.0 0.0 0.828 WNW 0.002 0.0 0.140 0.140 0.044 0.124 0.0 0.0 0.0 0.450 NW 0.002 0.047 0.140 0.140 0.0 0.164 0.039 0.0 0.0 0.533 NNW 0.002 0.0 0.140 0.234 0. '227 0.822 0.154 0.0 0.0 1.578 SUBTOTAL 0.047 0.234 3.508 6.314 6.005 10.105 1.836 0.058 0.0 28.107 TOTAL HOURS OF VALZD OBSERVATIONS 2138.000 TOTAL HOURS OF ELEVATED RELEASES 1955.510 TOTAL HOURS OF STABILITY CLASS E 647.730 TOTAL HOURS OF ELEVATED STABILITY CLASS E 600.930 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.67 METER LEVEL WZND SPEED MEASURED AT 45.67 METER LEVEL EFFLUENT VELOCITY & 12 '0 M/S DATE PRINTED: 07/23/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAZNED FROM UNROUNDED NUMBERS

BFN Rad Im Jan-June 1 STABILITY CLASS F ( 1. DELTA T<55 4. 0 C/100 M) Page 64 of BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 92 JUN 30, 92 WIND WIND SPEED(MPH)

DIRECTION CALM 6. 6-1 .4 1 . 5-3 .4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >3524. 5 TOTAL N 0.002 0.047 0.0 0.140 0.0 0.246 0.0 0.0 0.0 0.435 NNE 0.002 0.047 0.0 0.094 0.0 0.400 0.039 0.037 0.0 0.618 NE 0.002 0.0 0.047 0.094 0.046 0.205 0.038 0.0 0.0 0.432 ENE 0.004 0.0 0.094 0.094 0.0 0.123 0.0 0.0 0.0 0.314 E 0.002 0.0 0.047 0.0 0.134 0.326 0.0 0.0 0.0 0.508 ESE 0.021 0.047 0.468 0.140 0.045 0.126 0.0 0.0 0.0 0.847 SE 0.010 0.0 0.234 0.281 0.224 0.084 0.0 0.0 0.0 0.832 SSE 0.013 0.0 0.327 0.094 0.362 0.210 0.0 0.0 0.0 1.007 S 0.006 0.0 0.140 0.327 0.087 0.085 0.077 0.0 0.0 0 F 723 SSW 0.004 0.0 0.094 0.140 0.135 0.243 0.077 0.0 0.0 0.692 SW 0.004 0.0 0.094 0.187 0.317 0.128 0.0 0.0 0.0 0.729 WSW 0.008 0.094 0.094 0.140 0.0 0.043 0.0 0.0 0.0 0.379 W 0.004 0.047 0.047 0.0 0.0 0.042 0.0 0.0 0.0 0.139 WNW 0.0 0.0 0 ' 0.047 0.0 0.0 0.0 0.0 0.0 0.047 NW 0.006 0.0 0.140 0.0 0.0 0.0 0.0 0.0 0.0 0.146 NNW 0.008 0.0 0.187 0.094 0.179 0.082 0.078 0.0 0.0 0.627 SUBTOTAL 0.094 0.281 2.011 1. 871 1.529 2.345 0.308 0.037 0.0 8.475 TOTAL HOURS OF VALID OBSERVATIONS 2138. 000 TOTAL HOURS OF ELEVATED RELEASES 1955.510 TOTAL HOURS OF STABILITY CLASS F 196.400 TOTAL HOURS OF ELEVATED STABZLITY CLASS F 181.190 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1. 3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.67 METER LEVEL WIND SPEED MEASURED AT 45.67 METER LEVEL EFFLUENT VELOCITY ~ 12.60 M/S DATE PRINTED: 07/23/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BFN Rad Im Jan-June 1 STABILITY CLASS G (DEL T > 4.0 C/100 M) Page 65 of BROWNS FERRY NUCLEAR PLANT PART 2 OF 2 ELEVATED RELEASE MODE APR 1, 92 - JUN 30, 92 WIND WIND SPEED(MPH)

DIRECTION CALM 6.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 )~24.5 TOTAL N 0.0 0.0 0.0 0.0 0.044 0.161 0.0 0.0 0.0 0.205 NNE 0.0 0.0 0.0 0.047 0.045 0.164 0.116 0.0 0.0 0.372 NE 0.0 0.0 0.0 0.047 0.0 0.0 0.0 0.0 0.0 0.047 ENE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 E 0.0 0.047 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.047 ESE 0.0 0.0 0.140 0.047 0.045 0.0 0.0 0.0 0.0 0.232 SE 0.0 0.0 0.047 0.561 0.225 0.043 0.0 0.0 0.0 0.876 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 0.047 0.094 0.0 0.0 0.0 0.0 0.0 0.140 SSW 0.0 0.0 0.0 0.0 0.093 0.0 0.0 0.0 0.0 0.093 SW 0.0 0.0 0.0 0.0 0.043 0.043 0.0 0.0 0.0 0.087 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 0.094 0.0 0.0 0.0 0.0 0.0 0.094 WNW 0.0 0.0 0.094 0.047 0.0 0.0 0.0 0.0 0.0 0.140 NW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NNW 0.0 0.047 0.0 0.047 0.044 0.0 0 ' 0.0 0.0 0.138 SUBTOTAL 0.0 0.094 0.327 0.982 0.540 0. 411 0.116 0.0 0.0 2.471 TOTAL HOURS OF VALZD OBSERVATZONS 2138.000 TOTAL HOURS OF ELEVATED RELEASES 1955.510 TOTAL HOURS OF STABILITY CLASS G 60.630 TOTAL HOURS OF ELEVATED STABILITY CLASS G 52.830 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 45.30 AND 89.59 METERS WIND DIRECTION MEASURED AT 45.67 METER LEVEL WIND SPEED HEASURED AT 45.67 METER LEVEL EFFLUENT VELOCITY 55 12.60 M/S DATE PRINTED: 07/23/92 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

BFN Rad Imp TA FR UEN I Jan-June 1 STABILITY CLASS A (DELTA T<~-1.9 C/100 M) Page 66 of BROWNS FERRY NUCLEAR PLANT APR 1, 92 JUN 30, 92 WIND WIND SPEED(HPH)

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 0.0 0.0 0.0 0.0 NNE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NE 0.0 0.0 0.0 0.0 0 ' 0.0 0.0 0.0 0.0 ENE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 E 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ESE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SSE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 S 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SSW 0.0 0 ~ 0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SW 0.0 0.0 0.0 0.0 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 W 0.0 0.0 0.0 0,0 0.0 0.0 0.0 0.0 0 ~ 0 WNW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NNW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SUBTOTAL 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2182 TOTAL HOURS OF STABILITY CLASS A 0 TOTAL HOURS OF VALID WIND DZRECTZON-WIND SPEED-STABILITY CLASS A 0 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2158 TOTAL HOURS CALM 0 METEOROLOGICAL FACZLITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 92.63 METER LEVEL DATE PRZNTED: 07/23/92 MEAN WIND SPEED ~ 0.0 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

R Q I ED Y IN D RECTION FOR BFN Rad Im STABILITY CLASS B {-1.9< 'LTA T<~-1.7 C/100 M) Jan-June 1 Page 67 of 7 BROWNS FERRY NUCLEAR PLANT APR 1, 92 - JUN 30, 92 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 0.0 0.0 0.0 0.0 0.0 NNE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NE 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 0.0 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 0.0 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 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 NNW 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'ALID STABILITY OBSERVATIONS 2182 TOTAL HOURS OF STABILITY CLASS B 0 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY CLASS B 0 TOTAL HOURS OF VALZD WZND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2158 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1 ' KM ESE Of BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 92.63 METER LEVEL DATE PRINTED: 07/23/92 MEAN WIND SPEED ~ 0.0 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

BPN Rad Imp Jan-June 1 STABILITY CLASS C (-1 ~ 7< LTA-T<~-1 ~ 5 C/100 M) Page 68 of BROWNS FERRY NUCLEAR PLANT APR 1, 92 JUN 30, 92 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 0.0 0.0 0.0 0.0 0.0 NNE 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NE 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 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 0.0 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 0.0 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 0.0 0.0 WSW 0.0 0.0 0.0 0.046 0.0 0.0 0.046 0.046 0.0 0.139 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 NW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 NNW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SUBTOTAL 0.0 0.0 0.0 0.046 0.0 0.0 0.046 0.046 0.0 0.139 TOTAL HOURS OF VALID STABILITY OBSERVATZOHS 2182 TOTAL HOURS OF STABZLZTY CLASS C ~ 3 TOTAL HOURS OF VALID WZND DIRECTION-WIND SPEED-STABILITY CLASS C 3 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2158 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 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 92 '3 METER LEVEL DATE PRINTED: 07/23/92 MEAN WIND SPEED ?E 12.9 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

JOINT PERCENTAGE FREQUENCZE OF PEED BY WEND DIRECTION FOR BFN Rad Im Jan-June 1 STABILITY CLASS D t-1.5< ELTA-T< -0.5 C/100 M)

Page 69 of BROWNS FERRY NUCLEAR PLANT APR 1, 92 JUN 30, 92 WIND WIND SPEED(MPH)

DZRECTION 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 N 0.0 0.0 0.046 0.463 1.622 2. 085 0.695 0.139 5.097 NNE 0.0 0.0 0.232 0.278 1.019 1.344 0.788 0.093 4.124, NE 0.0 0.0 0.232 0.232 0.556 0.741 0.046 0.0 1.946 ENE 0.0 0.046 0.139 0.185 0.371 0.139 0.0 0.0 0.973 E 0' 0.0 0.324 0.232 0.278 0.093 0.0 0.0 1. 019 ESE 0.0 0.046 0.278 0.510 1.854 1.807 0.0 0.0 5.051 SE 0.0 0.093 0.927 0.602 0.649 1.946 1.158 0.093 6.673 SSE 0 ' 0.0 0.324 0.417 0.602 1.483 1.019 0.185 4.449 S 0.0 0.046 0.463 0.278 0.880 1.576 0.185 0.0 3.753 SSW 0.0 0 ' 0.371 0.185 0.463 0.741 0.046 0.0 2.178 SW 0.0 0.093 0.556 0.046 0.695 0.741 0.371 0.0 2.919 WSW 0.0 0.0 0.510 0.417 1.066 0.834 0.046 0.0 3.383 W 0.0 0.0 0.232 0.741 1. 668 0.649 0.278 0.0 4.124 WNW 0.0 0.0 0.046 0.510 1.483 0.278 0.139 0.046 3.105 NW 0.0 0.046 0.093 0.834 1.900 2.039 0.695 0.093 6.024 NNW 0.0 0.093 0.0 0.185 0.695 1. 761 0.324 0.0 3.197 SUBTOTAL 0.0 0.463 4.773 6.163 6.117 15.802 18.258 5.792 0.649 58.017 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2182 TOTAL HOURS OF STABILITY CLASS D 1268 TOTAL HOURS OF VALID WZND DIRECTION-WIND SPEED-STABILITY CLASS D 1252 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATZONS 2158 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 45.30 AND 89.59 METERS WZND SPEED AND DIRECTION MEASURED AT THE 92.63 METER LEVEL DATE PRINTED: 07/23/92 MEAN WIND SPEED ~ 11.2 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

J INT PER ENTAGE E BFN Rad Im Jan-June 1 STABILITY CLASS E (-0.5< LTA-T<~ 1.5 C/100 M) Page 70 of BROWNS FERRY NUCLEAR PLANT APR 1, 92 JUN 30, 92 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 0.232 0. 695 1.437 0.093 0.0 2.641 NNE 0.010 0.0 0.139 0.185 0.880 0.880 0.093 0.0 2.373, NE 0.003 0.0 0.046 0.139 0.602 0.602 0.093 0.0 1.486 ENE 0.006 0.0 0.093 0.278 0.093 0.417 0.046 0.0 1.119 E 0.013 0.0 0.185 0. 417 0.556 0.093 0.046 0.0 1.357 ESE 0.019 0.0 0.278 0.417 1. 112 1.251 0.046 0.0 3.309 SE 0.010 0.0 0.139 0.463 1.066 1.437 0.232 0.0 3.949 SSE 0.013 0.0 0.185 0.556 0.834 0.463 0.556 0.0 3.118 S 0.003 0.0 0.046 0.232 0.649 0.602 0.0 0.0 1.625 SSW 0.013 0.046 0.139 0.185 0.510 0.834 0.232 0.0 2.145 SW 0.019 0.139 0.139 0.185 0.834 1.158 0.093 0.0 2. 614 WSW 0.003 0.046 0.0 0.185 0.324 0.371 0.0 0.0 1.115 W 0.003 0.0 o.o46 0.139 0.463 0.139 0.0 0.0 0.884 WNW 0.006 O.D D.D93 0.185 0.093 0.139 0.0 0.0 0.748 NW 0.010 0.046 0.093 0.093 0.139 0.278 0.0 0.0 0.658 NNW 0.006 0.0 0.093 0.046 0.278 0.695 0.093 0.0 1.258 SUBTOTAL 0.139 0.278 1.715 2.780 3.939 9.129 10.797 1.622 0.0 30.398 TOTAL HOURS OF VALID STABZLITY OBSERVATZONS 2182 TOTAL HOURS OF STABILITY CLASS E 664 TOTAL HOURS OF VALID WZND DIRECTION-WIND SPEED-STABILITY CLASS E 656 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2158 TOTAL HOURS CALM 3 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 92.63 METER LEVEL DATE PRINTED: 07/23/92 MEAN WIND SPEED ~ 10.8 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

OZ P R PEED BY IND DIRECTION FOR BFN Rad Im Jan-June 1 STABILITY CLASS F { 1.5< LTA-T<~ 4.0 C/100 M) Page 71 of BROWNS FERRY NUCLEAR PLANT APR 1, 92 - JUN 30, 92 WIND WIND SPEED{MPH)

DIRECTION CALM 0.6-1.4 3.5-3.4 3.5-5.4 5.5-2.4 7. 5-12. 4 '12. 5-18. 4 18.5-24. 4 24.5 TOTAL N 0.014 0.046 0.093 0.046 0.0 0.093 0.232 0.093 0.0 0.616 NNE 0.0 0.0 0 ' 0.0 0.046 0.046 0.232 0.232 0.0 0.556, NE 0.0 0' 0.0 0.0 0.046 0.232 0.185 0.093 0.0 0.556 ENE 0.005 0.0 0.046 0.0 0.093 0.046 0.0 0.0 0.0 0.190 E 0 ~ 0 0.0 0.0 0.046 0.046 0.185 0. 139 0.0 0.0 0.417 ESE 0.005 0 ~0 0.046 0.0 0.185 0.139 0.232 0.046 0.0 0.653 SE 0.014 0.0 0.139 0.278 0.185 0.232 0.093 0.0 0.0 0.941 SSE 0.005 0.046 0.0 0.139 0.093 0.463 0.093 0.0 0.0 0.839 S 0.014 0.0 0.139 0.0 0.0 0.371 0.278 0.093 0.0 0.894 SSW 0.005 0.0 0.046 0.0 0.046 0.278 0.232 0.232 0.0 0.839 SW 0.009 0.046 0.046 0.046 0.185 0.139 0.602 0.0 0.0 1.075 WSW 0.0 0 ' 0.0 0.046 0.046 0.232 0.093 0.0 0.0 0.417 W 0.009 0.0 0.093 0.046 0.046 0.046 0.046 0.0 0.0 0.287 WNW 0.005 0.0 0.046 0.185 0.0 0.0 0.0 0.0 0.0 0.236 NW 0.0 0.0 0.0 0.0 0.046 0.093 0.0 0.0 0.0 0.139 NNW 0.009 0.0 0.093 0.0 0.0 0.0 0.046 0.093 0.0 0.241 SUBTOTAL 0.093 0.139 0.788 0.834 1.066 2.595 2.502 0.880 0.0 8.897 TOTAL HOURS OF VALID STABII ITY OBSERVATZONS 2182 TOTAL HOURS OF STABILITY CLASS F 192 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 192 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY OBSERVATIONS 2158 TOTAL HOURS CALM 2 METEOROLOGICAL FACILITY: MET FACILITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABILITY BASED ON LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 92.63 METER LEVEL DATE PRINTED: 07/23/92 MEAN WIND SPEED ~ 10.6 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

BFN Rad Im JOINT PERCEN A E U Jan-June 1 STABILITY CLASS G (DELTA > 4.0 C/100 M) Page 72 of BROWNS FERRY NUCLEAR PLANT APR 1, 92 - JUN 30, 92 WZND WIND SPEED(MPH)

DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7 ' 7.5-12.4 12.5-18.4 18.5-24.4 >~24.5 TOTAL N 0.0 0.0 0.0 0.0 0.0 0.046 0.139 0.0 0.185 NNE 0.0 0.0 0.0 0.0 0.0 0.093 0.139 0.0 0.278 a NE 0.0 0.0 0.0 0.0 0.046 0.093 0.093 0.0 0.232 ENE 0.0 0.0 0.0 0.0 0.046 0.0 0.0 0.0 0.046 E 0.0 0 ' 0.0 0.046 0.0 0.0 0.0 0.0 0.046 ESE 0.0 0.0 0.0 0.046 0.046 0.0 0.0 0.0 0.093 SE 0.0 0.0 0.0 0.0 0.093 0.046 0.0 0.0 0.185 SSE 0.0 0.0 0.0 0.093 0.371 0.093 0.0 0.0 0.602 S 0.0 0.046 0.0 0.0 0.093 0.0 0.0 0.0 0.185 SSW 0.0 0.0 0.0 0.0 0.0 0.046 0.0 0.0 0.046 SW 0.0 0.0 0.0 0.046 0.139 0.046 0.046 0.0 0.278 WSW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.046 W 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 WNW 0.0 0.0 0.0 0.046 0.0 0.0 0.0 0.0 0.046 NW 0.0 0.0 0.046 0.093 0.093 0.0 0.0 0.0 0.278 NNW 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 SUBTOTAL 0.0 0.046 0.046 0.278 0.371 0.927 0.463 0.417 0.0 2.549 TOTAL HOURS OF VALID STABIZZTY OBSERVATZONS 2182 TOTAL HOURS OF STABILITY CLASS G 55 TOTAL HOURS OF VALID WIND DZRECTZON-WIND SPEED-STABILITY CLASS G 55 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2158 TOTAL HOURS CALM 0 METEOROLOGICAL FACILITY: MET FACZLITY LOCATED 1.3 KM ESE OF BROWNS FERRY NUCLEAR PLANT STABZLZTY BASED ON LAPSE RATE MEASURED BETWEEN 45.30 AND 89.59 METERS WIND SPEED AND DIRECTION MEASURED AT THE 92.63 METER LEVEL DATE PRINTED: 07/23/92 MEAN WIND SPEED ~ 11.0 MPH NOTE: TOTALS AND SUBTOTALS ABOVE ARE OBTAINED FROM UNROUNDED NUMBERS

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

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT 5208

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT

SUMMARY

FIRST HALF 1992 The radioactive effluents for the first half of 1992 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 WASTE DISPOSAL SEMIANNUAL REPORT SUPPLEMENTAL INFORMATION FIRST HALF 1992 I. Re ulator 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

0 EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT SUPPLEMENTAL INFORMATION FIRST HALF 1992 II. aximum 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:

gl + g2 < 1 0.15 14.4 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:

g3 + g4 < 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

0 EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT SUPPLEMENTAL INFORMATION FIRST HALF 1992 II. Maximum Permissible Concentrations (Continued)

D. Liquid Effluents 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'ALF 1992 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.

First Second guarter Quarter Units A. Liquid

1. Number of batches released 47 47 Each

2. Total time period for batch releases 13226 12019 Minutes

3. Maximum time period for a batch release 550 345 Minutes

4. Average time period for batch releases 281 256 Minutes

5. Minimum time period for a batch release 160 60 Minutes

6. Average stream flow during period of release of effluent into a flowing stream 55387 25320 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 1992 LIQUID EFFLUENTS SUMMATION OF ALL RELEASES First Second Unit guarter Quarter  % Error A. Fission and Activation Products

1. Total Releases Curies 6.65E-01 2.12E-01

2. Average Diluted Concentration Released During Period pCi/ml 2.27E-08 7.90E-09

3. Percent of Applicable Limit (1.00E-07 pCi/ml) 2.27E+01 7.90E+00 B. Tritium

1. Total Releases Curies 5.97E+00 5.21E+00

2. Average Diluted Concentration Released During Period pCi/ml 2.04E-07 1.94E-07

3. Percent of Applicable Limit (3E-03 pCi/ml) 6.81E-03 6.46E-03 C. Dissolved and Entrained Noble Gases

1. Total Releases Curies 5.78E-02 8.56E-03

2. Average Diluted Concentration Released During Period pCi/ml 1.98E-09 3.18E-10

3. Percent of Applicable Limit (2E-04 pCi/ml) 9.88E-04 1.59E-04 D. Gross Alpha Radioactivity

1. Total Releases Curies ND 2.13E-04 48

2. Average Diluted Concentration Released During Period pCi/ml ND 7.92E-12 E. Volume of Liquid Waste to Discharge Canal (Before dilution) Liters 5.50E+06 5.25E+06 3 F. Volume of Dilution Water for Period Liters 2.92E+10 2.69E+10 10 G. Total CCW flow for Six Months gigagallons 150.1 1 Includes Xe-133, Xe-135, and others Page 6 of 17

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT LIQUID RELEASES FOR FIRST HALF 1992 BATCH MODE

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

1. Cr-51 6.90E-02 3.15E-03

2. Mn-54 2.43E-02 5.21E-03

3. Co-58 3.38E-02 2.74E-03

4. Fe-59 ND

5. Co-60 7.21E-02 2.72E-02 E

6. Zn-65 7.69E-02 7.51E-03

7. Nb-95

8. Zr-95

9. Mo-Te-99m 7.04E-02 6.21E-03

10. I-131 9.87E-03 1.96E-03 ll. Xe-133 1.70E-02 5.54E-03

12. Cs-134 1.06E-03 6.72E-03

13. Xe-135 1.88E-02 2.89E-03

14. Cs-137 3.64E-02 8.69E-02

15. Ba-140 4.25E-03

16. La-140 2.49E-04

17. Ce-141 ND

18. Sr-89 3.77E-03 1.99E-02

19. Sr-90 1.30E-03 3.03E-03 Page 7 of 17

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT LIQUID RELEASES FOR FIRST HALF 1992 BATCH MODE

~Isoto e First Quarter Second Quarter (Not Required by Regulation (REG) Guide 1.21) Unit Curies Unit Curies

1. Fe-55 6.25E-04

2. Na-24 2.25E-01 3.74E-02

3. I-133 2.78E-02 3.87E-03

4. Xe-133m 1.33E-04

5. I-135 4.01E-03

6. Y-91m 4.09E-05 ND

7. Sb-125 4.25E-04

8. I-132 3.30E-05

9. Xe-135m 1.62E-08 1.42E-12

10. Sr-91 3.85E-03 ND ll. Sr-92 3.95E-05 ND

12. Ru-103 2.87E-04

13. Kr-85 2.19-02 Page 8 of 17

EFFLUENT AND HASTE DISPOSAL SEMIANNUAL REPORT FIRST HALF 19921 GASEOUS EFFLUENTS SUMMATION OF ALL RELEASES First Second Summation of All Releases Unit quarter guarter  % Error A. Fission and Activation Gases

1. Total Releases Curies 8.84E+02 1.60E+03

2. Average Release Rate for Period pCi/sec 1.12E+02 2.04E+02

3. Percent of Technical Specification (TS) limitl 7.82E-04 1.38E-02 B. Iodines

1. Total Iodine-131 6 I-133 Ci 1.99E-02 2.95E-02 36

2. Average Release Rate for Period pCi/sec 2.54E-03 3.75E-03

3. Percent of TS limit e/ 9.29E-02 1.42E-01 C. Particulates

1. Particulates with half-lives

> eight days Ci 6.52E-03 2.83E-03 35

2. Average release rate for period pCi/sec 8.29E-04 3.61E-04

3. Percent of TS limit 2.99E-02 1.52E-02

4. Gross alpha radioactivity Ci 1.91E-06 , ND D. Tritium

1. Total release Ci 2.21E+00 4.95E+00 21

2. Average release rate for period pCi/sec 2.81E-Ol 6.92E-Ol

3. Ground level release Ci 2.10E+00 4.82E+00

4. Elevated release Ci 1.03E-01 1.23E-01 Reporting period 182 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 19921 GASEOUS EFFLUENTS ELEVATED RELEASE First Second Unit Quarter Quarter

1. Fission Gases Kr-85m Ci 2.54E+02 3.37E+02 Kr-85 Ci ND ND Kr-87 3.76E+01 8.12E+Ol Kr-88 Cj 2.95E+02 5.01E+02 Xe-133 Ci 2.65E+02 4.88E+02 Xe-135m Ci ND ND Xe-135 5.33E+02 7.99E+00 Xe-138 Ci ND ND Others (specify)

Ar-41 Ci 2.60E+Ol 4.16E+Ol Total for Period Ci 8.84E+02 1.46E+03

2. Iodines I-131 Cj 1.05E-03 1.18E-03 I-132 Cj 2.42E-03 5.03E-03 I-133 Ci 3.16E-03 4.17E-03 I-134 Ci ND ND I-135 Ci 5.31E-03 7.82E-03 Total for Period Ci 1.19E-02 1.82E-02 Page 10 of 17

EFFLUENT AND HASTE DISPOSAL SEMIANNUAL REPORT FIRST HALF 1992 GASEOUS EFFLUENTS ELEVATED RELEASE First Second Unit guarder Quarter

3. Particulates Sr-89 1 Cj 9.67E-05 1.51E-05 Sr-90 1 Ci 2.88E-07 ND Cs-134 Ci ND ND Cs-137 Cj ND 7.10E-06 Ba-140 Cj 1.16E-04 1.05E-04 La-140 Ci 7.10E-05 2.96E-05 Others (specjfy)

Cr-51 Ci ND ND Ba-139 Ci ND 6.66E-02 Ag-110M Ci ND ND Ce-141 Ci ND ND Co-58 Cj ND ND Co-60 Ci ND ND Mn-54 Ci ND ND Mn-56 Ci 1.17E-03 ND MoTc-99m Cj ND ND Na-24 Ci ND ND Zn-65 Ci ND ND Total for Period Ci 1.46E-03 6.68E-02

4. Tritium Ci 1.03E-01 1.23E-01 Predicted estimation of releases.

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

Page ll of 17

II 0

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT FIRST HALF 1992 GASEOUS EFFLUENTS -'ROUND LEVEL RELEASE First Second Unit guarder Quarter

1. Fission Gases Kr-85m Ci ND Kr-85 Cj ND ND Kr-87 Ci ND 3.50E+01 Kr-88 Cj ND ND Xe-133 Ci 9.16E-03 8.41E+01 Xe-135m Ci ND ND Xe-135 Ci 9.43E-03 2.81E+01 Xe-138 Cj ND ND Others (specify)

Ar-41 Ci ND ND Total for Period Cj 1.90E-02 1.47E+02

2. Iodines lt I-131 Ci 1.38E-03 2.43E-03 I-132 Ci 4.53E-03 6.42E-02 I-133 Ci 1.44E-02 2.17E-02 I-134 Ci 4.81E-02 ND I-135 1.05E-02 2.70E-02 Total for Period Ci 7.89E-02 1.15E-Ol Predicted estimation of releases.

Page 12 of 17

V EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT FIRST HALF 1992 GASEOUS EFFLUENTS GROUND LEVEL RELEASE First Second Unit guarter guarter

3. Particulates2 Sr-89 1 Ci 1.22E-05 2.40E-04 Sr-90 1 Ci ND 2.33E-07 Cs-134 Ci Cs-137 Ci 5.47E-05 2.32E-04 Ba-140 Ci 3.05E-04 2.02E-04 La-140 1.38E-04 ND Others (specify)

Ag-110m Ci ND 1.01E-04 Ba-139 Ci ND 2.60E-01 Ce-141 Ci 1.94E-05 1.99E-05 Co-58 Ci ND 9.63E-05 Co-60 Ci 1.55E-04 1.97E-04 Cr-51 Ci 2.26E-04 1.15E-03 Mn-54 Ci ND 1.38E-04 Mn-56 Ci 4.15E-03 8.72E-02 MoTc-99m Ci ND 4.22E-04 Na-24 Ci ND 2.04E-02 Zn-65 Ci ND 3.06E-04 Total for Period Ci 5.06E-03 3.70E-01

4. Tritium Ci 2.12E+00 5.21E+00 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 1992 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 9.56E+01 sludges, evaporator Ci 1.47E+02 1.50E+01 bottoms, etc.

• b, Dry compressible waste m3 6.46E+01 contaminated equip., etc. Ci 1.08E+03 1.50E+01 C~ Irradiated components, m3 7.00E+00 control rods, etc. Ci 3.41E+04 1.50E+01

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

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

~4E~1 m3, ~114E 01 Ci. 1hese 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) 3.51E+00 , 5.15E+00

2. Cobalt-60 (1) 2.75E+01 4.03E+01

3. Cesium-134 (1) 5.10E+00 7.45E+00

4. Cesium-137 (1) 3.30E+Ol 4.83E+01

5. Nickel-63 (1) 1.93E+01 2.82E+01

6. Manganese-54 (1) 2.51E+00 3.68E+00

7. Iodine-131 (1) 1.00E+00 1.48E+00

8. Barium/Lanthanum-140 (1) 1.15E+00 1.69E+00

9. Zinc-65 (1) 5.90E+00 8.70E+00

10. Other nuclides (2) < 1% 1.57E+00 (1) Measured (2) Calculated Page 14 of 17

0 0,

EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT FIRST HALF 1992, 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.

Nuclide Percenta e Ci

1. Iron-55 (2) 2.64E+01 2.85E+02

2. Cobalt-60 (2) 3.10E+Ol 3.35E+02

3. Nickel-63 (2) 3.93E+01 4.24E+02

4. Antimony-125 (2) 3.16E+00 3.40E+Ol (1) Measured (2) Calculated

c. Irradiated components, control rods, etc.

Nuclide Percenta e Ci

1. Iron-55 (2) 1.62E+Ol 5.53E+03

2. Colbalt-60 (2) 7.91E+01 2.70E+04

3. Nickel-63 {2) 4.30E+00 1.48E+03 (1) Measured (2) Calculated

3. Solid Waste Disposition Number of Mode of

~Shi ments Trans ortation Destination 29 Sole Use Truck Barnwell, SC 36 Sole Use Truck Quadrex, Oak Ridge, TN Sole Truck SEG, Oak Ridge, TN Page 15 of 17

0 EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT FIRST HALF 1992 SOLID WASTE AND IRRADIATED FUEL SHIPMENTS'Continued)

B. Irradiated Fuel Disposition Number of Mode of

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

~Shi ments Container ~nantit Containers Volume Waste 41 Strong A-LSA See Note See Note DAW Tight Container (STC) 13 High A-LSA 13 5.83m3 Dewatered Integrity Resin Container (HIC)

HIC A-LSA 4.84m3 Dewatered Resin HIC A-LSA 3.75m3 Dewatered Resin HIC B-LSA 3.75m3 Dewatered Resin HIC IICII 3.4lm3 DAW fuel pool filters Steel IIC II 1.6m3 Irradiated Liner Hardware Steel II C

II .2lm3 Irradiated Liner Hardware Solidification agents used: None Absorbents used: None Page 16 of 17

0 EFFLUENT AND WASTE DISPOSAL SEMIANNUAL REPORT FIRST HALF 1992 SOLID WASTE AND IRRADIATED FUEL SHIPMENTS'Continued)

C. Description of Shipments (Continued)

NOTE: 41 shipments to waste processor contained the following:

Type of Number of Volume Each P~aeka e ea 'Packa Packa e m3 40'ealand (STC) 72.50 20'ealand (ST) 36.25 "FR" Box (STC) 19 06.40 "B" Box (STC) 02.66 "Fuel Channel" 01.90 Box (STC)

"7A/55 Gallon" 1832 00.21 Drums STC)

Leaded Shroud 12.90 Head Bolt Box Page 17 of 17

0, ENCLOSURE 3 TENNESSEE VALLEY AUTHORITY SEMIANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT BROWHS FERRY NUCLEAR PLANT (BFN)

INOPERABLE RADIOLOGICAL EFFLUENT INSTRUMENTATION REPORT

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 Offsite Dose Calculation Manual (ODCM), section III of 1/2.1.1 and 1/2.1.2. The BFN TS sections and ODCM section 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 During the reporting period, January 1 through June 30, 1992, there was no airborne or liquid radiological effluent instrumentation inoperable for periods greater than 30 days.

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

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

CHANGES TO THE BFN OFFSITE DOSE CALCULATION MANUAL JANUARY THROUGH JUNE 1992

CHANGES TO THE ODCM BFN Techanical Specification 6.12.2 requires that changes to the Offsite Dose Calculation Manual (ODCM) be submitted to the commission with the semiannual Radioactive Effluent Release Report for the period in which the changes were made. This report covers the period betwee'n January through June 1992.

During this period, three revisions have been made to the ODCM. Revision 9 was a general revision and is submitted in its entirety. In Revisions 10 and 11, only the pages affected by the changes are submitted. Reference the attached notebook which contains the above changes.

0 Page 1 of 1

0