ML18033A367

Radiological Impact Assessment Rept Browns Ferry Nuclear Plant,Jan-June 1988.

ML18033A367
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Site:	Browns Ferry
Issue date:	06/30/1988
From:	TENNESSEE VALLEY AUTHORITY
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TENNESSEE VALLEY AUTHORITY NUCLEAR POWER GROUP NUCLEAR SUPPORT RADIOLOGICAL CONTROL RADIOLOGICAL IMPACT ASSESSMENT REPORT BROWNS FERRY NUCLEAR, PLANT JANUARY THROUGH JUNE 1988 Prepared by: Reviewed by Approved by: 0506c Sg0yf40470 8808~3~~q pgg ggOCg D60 R PD

Radiological Impact Assessment Browns Ferry Nuclear Plant January-June 1988 Potential doses to maximum individuals and the population around Browns Ferry are calculated for each quarter as required by BFN Radiological Effluent Technical Specification manual Section F.2.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 A D GASEOUS EFFLUE RELEASES-FIRST HALF 1 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 above preset limits, then releases are terminated.

Airborne releases for each quarter in the first half of 1988 are listed in Table l.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 and equipment drains and sumps.The collected liquids are then p rocessed through a clean-up system, composed of storage tanks, re'cycling 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.Liquid releases for each quarter in the first half of 1988 are given in Table 2.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 LI ITS 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 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 10 CFR 20 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.

The Technical Specification limits 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 limits for doses to a member of the geheral'public from radioactive material in liquid effluents released to unrestricted areas, is: Less than or equal to 4.5 mrem per quarter and 9 mrem per year (for the 3-unit site)to the total body,-and-Less than or equal to 15 mrem per quarter and 30 mrem per year (for the 3-unit site)to any organ The EPA limits for total dose to the public in the vicinity of a nuclear power plant, established in the Environmental Dose Standard of 40 CFR 190, are: Less than or equal to 25 mrem per year to the total body, Less than or equal to 75 mrem per year to the thyroid,-and-Less than or equal to 25 mrem per year to any other organ.t DOSE CALCULATIO S 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, l.ill 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.These pathways are shown in Figure 1.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.In reality, the expected dose to actual individuals is lower.The calculation methods and results of the calculations are presented in the following sections.

DOSES FROM AIRBOR EFFLUE S For airborne effluents, the public can be exposed to radiation from several sources: direct radiation from the radioactivity in the air, direct radiation from radioactivity deposited on the ground, inhalation of airborne radioactivity, ingestion of vegetation which contains radioactivity deposited from the atmosphere, and ingestion of milk and beef which contains radioactivity deposited from the atmosphere onto vegetation which is then eaten by milk and beef animals.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.t Airborne Release Points and Meteorolo ical Data Meteorological data at Browns Ferry are measured continuously.

Measurements collected include the wind speed, wind direction, and the temperature at heights of 10, 46 and 91 meters above the ground.Average 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 not distributed by direction.

Stability classes are determined from the vertical temperature gradient 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.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 gradient between 10 and 46 meters.

R eleases from the radwaste and reactor buildings are considered split-le'vel 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 velocity.The split-level dispersion approach is implemented using a model that requires two complete average 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 gradient 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 gradient 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.Stability class D is assumed to persist at the effluent release level of 180 meters for the entire period.For the period January 1, 1978-December 31, 1980, stable conditions (E, F, or G stability) existed in the layer from 46 to 91 meters at Browns Ferry Nuclear Plant (BFN)about 43 percent of the time.Neutral conditions existed about 56 percent of the time.This suggests that the use of a D stability for stack releases is conservative or realistic about 99 percent of the time.The first and second quarter JFDs are listed in Tables 3 and 4, respectively.

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.

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.These doses are calculated based on the reported releases for all nuclides (Table 1)for all receptor points shown on Table 5.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 in the first half of 1988 are as shown below.Individual Doses from Airborne Effluents External Air Exposures (mrad)Dose Location First uarter 1 y Air dose 8 Air dose 1.7E-10 mrad 1.9E-07 mrad Highest offsite exposure>Highest offsite exposure2 Second uarter 1 8 y Air dose B Air dose 4.8E-07 mrad 2.6E-07 mrad Highest offsite exposure3 Highest offsite exposure4 1 Location with highest offsite 2 Location with highest offsite 3 Location with highest offsite 4 Location with highest offsite exposure is 6100 meters in the HW sector.exposure is 1650 meters in the HNW sector.exposure is 1525 meters in the N sector.exposure is 1620 meters in the N sector.

Submersion Dose-Airborne Effluents xternal 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.These doses are calculated based on the reported releases for noble gases (Table 1)for all receptor points shown on Table 5.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 in the first half of 1988 are as shown below.Individual Doses from Airborne Effluents Submersion Exposures (mrad)First uarter 1 Dose Location Total Body Skin O.OE-OO mrem O.OE-OO mrem All locations All locations Second uarter 1 8 Skin O.OE-OO mrem O.OE-OO mrem All locations All locations Or an Dose-Airborne Effluents Internal doses to organs due to releases of airborne effluents are estimated for the inhalation, ground contamination, and ingestion pathways.The ingestion pathway is further divided into four possible contributing pathways: ingestion of cow milk, ingestion of goat milk, ingestion of beef, and ingestion of vegetables.

Doses from applicable pathways are calculated for each real receptor location defined in'able 5.Doses are calculated based on the reported iodine and particulate releases as shown on Table 1.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 in the first half of 1988 are shown below.Individual Doses from Airborne Effluents Maximum Organ (mrem)First uarter 1 Organ GI Tract Age Group Teen Dose 9.1E-05 mrem Individual Pathway Contributions:

Vegetable Ingestionl 4.5E-05 Beef Ingestion 1.7E-06 Inhalationl 2.5E-06 Ground Contaminationl 4.2E-05 Milk Ingestion N/A Second uarter 8 GI Tract Teen 5.1E-03 mrem Individual Pathway Contributions:

Vegetable Ingestion3 2.4E-03 Beef Ingestion4 1.3E-04 Inhalation3 6.0E-06 Ground Contamination3 2.6E-03 Milk Ingestion N/A1 Maximum real receptor is located at 1830 meters in the NNW sector.Calculated for the site boundary at 1650 meters in the NNW sector.3 Maximum real receptor is located at 1830 meters in the NNW sector.4 Calculated for the site boundary at 1525 meters in the N sector.

Dose Summa-Airborne Effluents The table below gives a comparison of the calculated doses for the first half of 1988 to their respective quarterly limits.Doses from Airborne Effluents-First Half 1988 Browns Ferry Nuclear Plant Dose Pathway Airborne-Gamma Air Dose Quarter Dose 1 1.7E-10 mrad 2 4.8E-07 mrad Quarterly Limit*5 mrad Percent of Limit<1%1%Airborne-Beta Air Dose 1 1.9E-07 mrad 2 2.6E-07 mrad 10 mrad<1%<1%Airborne-Max Organ Dose 1 9.1E-05 mrem 2 5.1E-03 mrem 7.5 mrem<1%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.As is shown by the table, all calculated quarterly doses were well below the allowable limits established in Browns Ferry's Technical Specifications.

For a comparison to previous releases and doses, graphs are presented as Figures 2 and 3 which show corresponding airborne releases and doses for the period 1980 to the present.0 DOSES FROM LI UID EFFLUE S For liquid effluents, the public can be exposed to radiation from three sources: the ingestion of water from the Tennessee River, the ingestion of fish caught in the Tennessee River, and direct exposure from radioactive material deposited 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 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 32,020 ft3/s for the first quarter of 1988 and 10,850 ft3/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 (Champion Paper Company).This could be interpreted as indicating that the maximum individual, as assumed for liquid releases from Browns Ferry, is an individual who obtains all of his drinking water at the Champion Paper Company, consumes 21 kg (6.9 kg for a child)

per year of fish caught from the Tennessee River between BFN and Wheeler Dim, 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 imum individual due to liquid effluents for the first half of 88 are presented below.Individual Doses from Liquid Effluents (mrem)First uarte 8 Organ Total Body Age Group Dose'Adult 1.8E-02 mrem Individual Pathway Contributions:

Water Ingestion 3.0E-04 Fish Ingestion 1.7E-02 Recreation 9.1E-04 Liver Adult 2.6E-02 mrem Individual Pathway Contributions:

Water Ingestion 4.2E-04 Fish Ingestion 2.5E-02 Recreation 7.8E-04 Second uarter 1 8 Total Body, Adult 1.3E-Ol mrem Individual Pathway Contributions:

Water Ingestion 1.8E-03 Fish Ingestion 1.1E-Ol Recreation 2.0E-02 Liver Adult 1.7E-01 mrem Individual Pathway Contributions:

Water Ingestion 2.6E-03 Fish Ingestion 1.5E-Ol Recreation 1.7E-02

Dose Summa-Li uid Effluents table below gives a comparison of the calculated doses for the rst half of 1988 to their respective quarterly limits.Doses from Liquid Effluents-First Half 1988 Browns Ferry Nuclear Plant Dose Pathway Quarter Dose Liquid-Total Body Dose 1 1.8E-02 mrem Quarterly Limit*4.5 mrem Percent of Quarterly Limit 1%Liquid-Max Organ Dose 2 1.3E-01 mrem 1 2.6E-02 mrem 2 1.7E-Ol mrem 15 mrem 3%1%1%*The quarterly limit for liquid doses is the total site dose limit (the t one-unit dose limit times 3).This is because all liquid radwaste systems are common to all 3 units and the releases cannot be attributed to one particular reactor unit.As is shown by the table, all calculated quarterly doses were well below the allowable limits established in Browns Ferry's Technical Specifications.

For a comparison to previous releases and doses, graphs are presented as Figure 4 which shows corresponding liquid releases and doses for the period 1980 to the present.

POPULATION DOSES Population doses for highest exposed organ due to airborne effluents are calculated for an estimated 627,000 persons living within a 0-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 1 Total Body Dose Maximum Organ Dose (organ)Liquid Airborne 1.6 man-rem 1.5E-04 man-rem 2.8 man-rem (liver)1.7E-04 man-rem (GI Tract)Second Quarter 1988 Liquid Airborne 10 man-rem 4.8E-03 man-rem 18 man-rem (liver)5.2E-03 man-rem (GI Tract)Population doses can be compared to the natural background dose to the same population of about 56,430 man-rem/yr (based on 90 mrem/year for natural background).

DIRECT RADIATION External gamma radiation levels were measured by thermoluminescent dosimeters (TLDs)deployed around BFN.The quarterly gamma radiation levels determined from these TLDs during this reporting period averaged approximately 19.3 mR/quarter at onsite stations and approximately 16.6 mR/quarter at offsite stations, or approximately 2.7 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 MENBERS OF THE PUBLIC I S DE THE SITE BOUNDARY No routine activities within the site boundary by members of the public have been identified which would lead to their radiation exposure.TOTAL DOSE 1 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 minitoring program.This dose is compared to the 40 CFR 190 limit for total body or any organ dose (other than thyroid)to determine compliance.

The annual thyroid dose to the maximum individual is conservatively.

es'timat6d by summing the following doses: the total body air submersion dose for each quarter, the thyroid dose fron 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 1988 Browns Ferry Nuclear Plant 0 Dose Total Bod or an Or an Dose (except thyroid)Total body air submersion dose Critical organ dose (airborne)

Total body dose from liquid effluents Maximum organ dose (liquid)Direct radiation dose First Quarter O.OE-OO 9.1E-05 1.8E-02 2.6E-02 O.OE-OO Second Quarter O.OE-OO 5.1E-03 1.3E-01 1.7E-01 O.OE-OO Total Cumulative Total Dose (Total body or other organ)4.4E-02 3.1E-01 3.5E-01 Th roid Dose Total body air submersion dose Thyroid dose (airborne)

Total body dose from liquid effluents Thyroid dose (liquid)Direct radiation dose O.OE-OO 4.7E-05 1.8E-02 1.8E-02 O.OE-OO O.OE-OO 2.6E-03 1.3E-01 1.2E-01 O.OE-OO Total (Thyroid)Cumulative Total Dose (Thyroid)3.6E-02 2.5E-01 2.9E-01

~CO CLUSIO As a result of operation of Browns Ferry Nuclear Plant for the first alf of 1988, radioactive effluents were released to the atmosphere d the Tennessee River.The released radioactivity resulted in stimated potential doses to the public which are well below the Technical Specification Limits and Regulatory Guidance.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 1988 Browns Ferry Nuclear Plant Dose Pathway Airborne-Gamma Air Dose Airborne-Beta Air Dose Airborne-Max Organ Dose Liquid-Total Body Dose Liquid-Max Organ Dose Total Dose-Thyroid otal Dose-Total Body or Organ other than Thyroid Dose 4.8E-07 mrad 4.5E-07 mrad 5.2E-03 mrem 1.5E-Ol mrem 2.0E-Ol mrem 2.9E-01 mrem 3.5E-Ol mrem Annual Limit 10 mradl 20 mradl 15 mreml 9 mrem2 30 mrem2 75 mrem 25 mrem Percent of Annual Limit 1%<1%<1%1%1%<1%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 Technical Specification limit for liquid doses is the total site dose limit (the one-unit dose limit times 3).This is because all liquid radwaste systems are common to all 3 units and the releases cannot be attributed to one particular reactor unit.

TABLE 1 BROWNS FERRX CLEAR PLANT-GASEOUS EFFLUENT RELEASES FIRST UARTER 1 8 Reactor Buildin Releases Tritium 8.87E-02 Ci Turbine Buildin Releases None Radwaste Buildin Releases Stack Releases Tritium 2.73E-03 Ci Tritium Co-60 8.84E-04 Ci 2.62E-05 SECO D UARTER 1 Reactor Buildin Releases Turbine Buildin Releases Tritium Cs-134 Cs-137 Co-60 1.47E-01 Ci 2.20E-05 8.40E-05 8.49E-04 Tritium Co-60 5.65E-03 Ci 2.40E-04 Radwaste Buildin Releases Stack Releases Tritium Co-60 5.16E-03 Ci 5.15E-06 Tritium Co-60 1.95E-04 Ci 3.13E-05

TABLE 2 BRO S FERRY CLEAR PLANT LI UID EFFLUE RELEASES CURIES Nuclide H-3 Sr-89 Sr-90 Fe-55 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Mo-99 I-131 Cs-134 Cs-137 Ce-141 Sb-125 Tc-99m Xe-133 Xe-135 Kr-85 Cr-51 Nb-95 Zr-95 Ba-140 La-140 First Quarter 2.94E-01<3.93E-04<2.10E-04 O.OOE+00 2.55E-05<5.11E-04<9.44E-04 4.71E-03 1.80E-03<4.19E-04<6.03E-04 6.45E-03 2.32E-02<7.11E-04 1.52E-05<4.19E-04<1.16E-03<3.32E-04 1.60E-03<4.62E-03<4.61E-04<8.25E-04<2.22E-03<3.04E-04 Second Quarter 4.40E-01<3.05E-04<1.81E-04<3.16E-03 1.40E-04<8.64E-04<1.86E-03 1.66E-02 2.62E-03<6.39E-04<9.66E-04 1.28E-02 5.02E-02<1.14E-03 1.81E-04<6.39E-04<1.93E-03<5.21E-04 O.OOE-OO 2.56E-05<7.67E-04<1.37E-03<3.67E-03<3.54E-04

BFN Rad Impact 1st Half 1988 Page 19 of 50 TABLE 3A (page 1 of 4)BROWNS FERRY CLEAR PLANT NETEOROLOGICAL DATA FIRST UARTER 1 8 JOINT FRE UENCY D S R B ION IN PERCENT FOR GROUND-LEVEL RELEASES SECTOR STABILITY CLASS A MIND SPEEDS IN HETERS PER SL'COND PROH THE SECTORS INDICATED 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS N NNE NE ENE E.ESE SE SSE S SSK SW MSM W MNK NW NNM 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0,000 0.000 0.279 0.418 0.558 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0,000 0.000 0.000 0.000 0.000 0.046 0.186 0.186 0.000 0.000 0.046 0.093 0,000 0.000 0.000 0.000 0,000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.093 0.000 0.000 0.000 0.046 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.279 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0,000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.093 0.000 0,000 0.000 0.000 0.046 0.465 0.604 0.558 0.093 0.092 0.186 0.000 0.279 0.046 0.046 TOTALS 0.000 0.000 0.000 1.349 0'57 0.185 0.418 0.000 0.000 2.510 SEC IOR STABILITY CLASS 8 MIND SPEEDS IN NETERS PER SECOND PRON THE SECTORS INDICATED 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 IOTALS N NNE NE ENE E ESE SE SSE S SSK SW MSK W MNM NW NNM 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0,000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.325 0.046 0.046 0.186 0.046 0.046 0.000 0.000 0.000 0.046 0.000 0.046 0.000 0.000 0.000 0.000 0.046 0.093 0.093 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.279 0.093 0.000 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.093 0.046 0.093 0.093 0.232 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.325 0.139 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.279 0.139 0.000 0.000 0.000 0.000 0.371 0.185 0.139 0.186 0.138 0.139 0.046 0.418 0.232 0.278 TOTALS 0.000 0.000 0.046 0.741 0.324 0.976 0.464 0.000 0.000 2.552 0506c "BFN Rad Impact 1st Half 1988 Page 20 of 50 TABLE 3A (page 2 of 4)BROWNS FERRY NUCLEAR PLANT METEOROLOGICAL DATA FIRST UARTER 1 JOINT FRE UENCY DISTRIBUTION I PERCE FOR GROUND-LEVEL RELEASES SECTOR STABILITY CLASS C WINO SPEEDS IN HETERS PER SECOND PRON THE SECTORS INDICATEO 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95'TOTALS N NNE NE ENE E ESE SE SSE S SSW SW WSW K WNW NW NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.DOO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 0.046 0 0.093 0 0.046 0 0.000 0 0.046 0 0.046 0 0.000 0 0.000 0 0.000 0 0.000 0 000 000 000 000 000 000 139 093 046 139 093 046 000 000 000 000 0.139 0.046 0.000 0.000 o.ooo 0.000 0.000 0.000 0.046 0.000 0.000 0.093 0.046 0.000 0.046 0.046 0.186 0.139 0.046 0.000 0,000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 0.139 0.418 0.418 0.186 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.186 0.139 0.093 0.000 0.000 0.000 0.000 0.000 0.000 D.ooo 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.418 0.185 0.046 0.000 0.000 0.000 0.185 0.186 0.138 0.139 0.139 0.231 0.185 0.604 0.603 0.325 TOTALS O.OOO O.OOO O.277 O.SS6 O.462 I.S79 O.S11 O.OOO O.OOO 3.386 SECTOR STABILITY CLASS D WIND SPEEDS IN HETERS PER SECOND PRON THE SECTORS INOICATEO 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS N NNE NE ENE E ESE SE SSE S SSW SK WSW K WNW HW NNW 0.002 0.002 0.002 0.001 0.002 0.002 0.005 0.007 0.006 0.002 0.005 0.003 0.003 0.001 0.002 0.001 0.046 0,046 0.000 0.046 0.046 0.000 0.046 0.046 0.000 0.000 0.046 0.046 0.000 0.000 0.046 0.000 0.186 0.139 0.232 0.093 0.186 0.186 0.465 0.604 0.558 0.186 0.465 0.232 0.279 0.139 0.139 0.093 1.256 0.884 0.465 0.139 0.186 0.372 0.604 0.604 0.418 0.279 0.186 0.372 0.465 0,372 0.651 0.511 0.651 1.070 0.465 0.372 0.232 0.093 0.046 0.372 0.186 0.000 0.139 0.279 0.744 0.744 0.791 1.163 2.279 1.396 0.977 0.093 0.000 0.093 0.000 0.325 0.279 0.046 0.046 0.325 0.977 2.419 2.559 2.373 0.697 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.046 1.303 2.559 0.465 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.093 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 5.118 3.536 2.141 0.744 0.652 0.746 1.167 1.959 1.448 0.513 0.888 l.258 2.515 5.0)I 6.792 4.606 IOTALS 0.046 0.414 4.185 7.767 7.349 14.186 5.070 0.139 0.000 39, 157 0506c BFN Rad Impact 1st Half 1988 Page 21 of 50 TABLE 3A (page 3 of 4)BROWNS FERRY NUCLEAR PLANT METEOROLOGICAL DATA FIRST UARTER 1 JOINT FRE UENCY DISTRIBUTION IN PERCENT FOR GROU D-LEVEL RELE SES SECTOR STABILITY CLASS E WINO SPEEDS IN HETERS PE'R SECOND EROH THE SEC'TORS INDI GATED 0.13 0.45 1.10 1~99 2~88 4~45 6.91 9.59 10.95 TOTALS N NNE NE ENE E ESE SE SSE S SSW SK WSW'K WNW NK NNW 0.010 0.009 0.014 0.012 0.017 0.013 0.025 0.020 0.007 0.007 0.007 0.007 0.007 0.006 0.012 0.013 0.046 0.046 0.232 0.046 0.093 0.046 0.186 0.093 0.093 0.000 0.000 0.093 0.000 0.046 0.139 0.139 0.511 0.465 O.558 0.651 0.838 0.697 1.210 1.024 0.325 0.372 0.372 0.325 0.418 0.279 0.511 0.604 0.418 0.558 0.232 0.279 0.232 0.465 1.024 0.838 0.697 0.186 0.465 0.325 0.186 0.325 0.372 0.558 0.325 0.325 0.046 0.000 0.046 0.372 0.232 0.651 1.117 0.139 0.186 0.372 0.046 0.093 0.372 0.465 0.186 0.325 0.093 0.000 0.000 0.000 0.093 0.232 0.744 0.232 0.000 0.093 0.093 0.325 0.465 0.697 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.000 0.279 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.497 1.729 1.176 0.989 1.226 1.594 2.770 2.858 3.077 0.937 l.031 1.216 0.750 1.075 2.151 2.478 IOIALS 0.186 1.299 9.163 7.163 4.789 3.580 0.372 0.000 0.000 26.552 SECTOR STABILITY CLASS P WINO SPEEDS IN HETERS PER SECOND EROH THE SECTORS INOICATEO 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS N NNE NE ENE E ESE SE SSE S SSW SK WSW K WNW NK NNW 0.011 0.004 0.006 0.011 0.009 0.021 0.030 0.018 0.006 0.005 0.004 0.001 0.002 0.001 0.000 0.011 0.093 0.046 0.000 0.139 0.000 0.046 0.093 0.139 0.046 0.093 0.000 0.000 0.046 0.000 0.000 0.000 0.511 0.186 0.325 0.465 0.511 1.117 1.535 0.838 0.279 0.186 0.232 0.046 0.046 0.046 0.000 0.604 0.558 0 0.558 0 0.000 0 0.139 0 0.279 0 0.325 0 0.884 0 0.838 0 0.838 0 0.093 0 0.046 0 0.046 0 0.000 0 0.046 0 0.000 0 0.372 0 139 0.139 325 0.186 046 0.000 000 0.000 000 0.000 ooo 0.046 279 0.000 651 0.139 697 0.697 000 0.000 000 0.046 000 0.000 000 0.000 000 0.000 000 0.000 139 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0,000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.452 1.306 0.377 0.754 0.800 1.555 2.821 2.623 2.564 0.377 0.328 0.093 0.094 0.093 0.000 1.127'Io'IALS 0.140 0.741 6.929 5.022 2,277 1.254 0.000 O.OOD 0.000 16.364 0506c BFN Rad Impact 1st Half 1988 Page 22 of 50 TABLE 3A (page 4 of 4)BROGANS FERRY NUCLEAR PLANT METEOROLOGICAL DATA FIRST UARTER 1 JOINT FRE UENCY DISTRIBUTIO IN PERCENT FOR GRO-VE R E SES STABILI TY CLASS 0 SECTOR wlND SPEEDS IN HETERS PER SECOND f RON THE SECTORS TNDICATEO 0.13 0.45 I.10 I.99 2.88 4.45 6.91 9.59 10.95 TOTALS N NNE NE ENE E ESE SE SSE S S5tt Stt ttSw WttH Ntt NNW 0.004 0.005 0.001 0.002 0.004 0.005 0.011 0.037 0.007 0.001 0.001 0.003 0.001 0.003 0.002 0.008 0.093 0.000 0.000 0.000 0.000 0.046 0.093 0.418 0.046 0.000 0.046 0.046 0.000 0.093 0.000 0.000 0.139 0.279 0.046 0.093 0.232 0.232 0.511 1.628 0.325 0.046 0.000 0.093 0.046 0.093 0.093 0.418 0.046 0.093 0.000 0.093 0.093 O.DOO 0.139 1.768 0.418 0.000 0.000 0.000 0.000 Q.ooo 0.000 0.046 0.000 0.232 0.000 0.000 0.000 0.000 0.046 0.697 0.139 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.000 0.186 0.139 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O,OOQ 0.000 0.000 Q.QOO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Q.ooo 0.000 0.000 o.oao 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 o.oaa 0.000 0.000 0.000 0.000 0.000 0.282 0.702 0.047 0.188 0.329 0.283 0.801 4,?35 1.075 0.047 o.a47 0.142 0.047 0.189 0.095 0.472 TOTALS 0.095 0.882 4.276 2.697 l.115 0.418 0.000 0.000 0.000 9.482 0506c BFN Rad Impact 1st Half 1988 Page 23 of SO TABLE 3B (Page 1l3f 4)BROWNS FERRY CLEAR PLANT METEOROLOGICAL DATA FIRST UARTER 1 JOINT FRE UENC DISTRIBUTIO I PERCENT FOR SPLIT-LEVEL R LE SES GROUND-LE L PORTIO SIABIL IT Y CLASS A SECTOR MIND SPEEDS IN HEI ERS PER SECOND f ROK THE SEC'TORS INDI CA ILO 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS N NNE NE ENE E ESE SE SSE S SSW SW WSW M WNW NM NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 o.oao 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 D.ooo 0.000 o.aoo 0.000 o.ooa 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.002 0.042 0.035 0.013 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 a.ooo 0.000 0.007 0.024 0.038 0.000 0.000 0.008 0.014 0.000 0.000 0.000 0.000 0.000 O.DOO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.010 0.018 0.000 0.000 O.OOD 0.004 0.009 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.080 0.010 0.000 0.000 a.oao 0.000 o.aoo 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 a.ooo 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.009 0.000 0.000 0.000 0.000 0.007 0.026 0.080 0.035 0.013 0.018 0.032 0.000 0.080 0.010 0.004 TOTALS 0.000 0.000 0.000 0.092 0.091 0.032 0.099 0~OOD D.DOO D.314 STABILITY CLASS B SECTOR WIND SPEEDS IN METERS PER SECOND PRDH THE SECTORS INDICATED 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS N NNE NE ENE E ESE SE SSE S SSW SK MSM M MNW NM NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.ODD 0.000 0.000 0.000 0.000 o.oao 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.DOD 0.000 0.000 0.000 0.000 0.000 O.ODO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 D.OOO 0.000 0.000 0.006 0.006 0.005 0.012 0.009 0.000 0.000 0.000 0.000 0.000 0.000 D.005 0.000 0.000 0.000 0.000 0.003 0.017 0.017 0.000 0.010 0.000 0.000 0.000 0.000 0.000 0.037 0.014 0.000 0.000 0.000 0.000 0.000 0.027 0.000 0.000 0.000 0.017 0.005 0.015 0.000 0.037 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.083 0.029 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.037 0.019 0.000 0.000 0.000 0.000 0.009 0.050 0.022 0.012 0.019 0.017 0.005 0.098 0.029 0.037 TOTALS 0.000 0.000 0.000 0.038 0~052 0.152 0~112 0~000 0.000 0.354 0506c BFN Rad Impact 1st Half 1988 Page 24 of 50 TABLE 3B (Page 2 of 4)BROWNS FERRY NUCLEAR PLANT METEOROLOGICAL DATA FIRST UARTER 1 8 JOINT FRE UENCY DISTRIBUTION IN PERCENT FOR S L T-LEVEL RELE S S G OUND-LEVEL PORTIO STADILITY CLASS C SECTOR MIND SPEEDS IN HETERS PER SECOND PRON THE SECTORS INDICATEO 0.13 0'5 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS N NNE NE ENE E ESE SE SSE 5 SSM Sw MSM M N'M NW NNM 0.000 0.000 0.000 0.000 0.000 D.ooo 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.DOO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.DOO 0.000 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 D.ooo 0.000 0.009 0.007 0.014 0.002 0.000 0.000 0.000 0.000 0.000 0.009 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.009 0.000 0.000 0.014 0.007 0.000 0.000 0.001 0.025 0.019 0.006 0.000 0.000 O.OOD 0.000 0.000 0.000 0.000 0.000 0.013 0.021 0.056 0.063 0.030 0.019 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.051 0.028 0.018 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.ooo 0.000 0.000 0.053 0.021 0.006 0.000 0.000 0.000 0.000 0.011 0.016 0.014 0.002 0.027 0.028 0.1O7 0.091 0.049 TOTALS 0.000 0.000 0.002 0.032 0.042 0.233 0.116 0.000 0.000 0.425 STADILITY CLASS D 5ECTOR MIND SPEEDS IN HETERS PER SECOND PRON THE SECTORS INDICATED 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 To'IALS N NNE NE ENE ESE SE SSE 5 SSM SM MSM W MNM NM NNM 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 o.ooo 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0<000 0.000 0.004 0.000 0.011 0.007 O.OOD 0.002 0.000 0.000 0,000 0.000 0.013 0.008 0.004 0.007 O.014 0.017 0.051 0.068 0.047 0.038 0.024 0.011 0.018 0.004 0.002 0.009 0.057 0.094 0.027 0.025 0.032 0.013 0.007 0.077 0.045 0.000 0.023 0.033 0.079 0.052 0.056 0.087 0.381 0.217 0.140 0.005 O.ooo 0.017 0.000 0.197 0.199 0.010 0.007 0.067 0.145 0.359 0,406 0.408 0.157 0.000 0.000 0.000 O.OOO 0.000 0.000 0.000 0.000 0.000 D.DOO 0.000 0.026 0.367 0.638 0.089 0.000 0.000 0.000 0.000 0.000 O.ODO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.069 0.042 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.608 0.319 0.171 0.037 0.046 0.047 0.062 0.342 Oi302 0.055 0.054 0.113 0.268 0.851 1.144 0.593 TOTALS 0.000 0~000 0 F 024 0~335 0'07 2'58 1 F 277 0~111 0~000 5'13 0506c

BFN Rad Impact 1st Half 1988 Page 25 of 50 TABLE 3B (Page 3 of 4)BRO S FERRY NUCLEAR PLANT METEOROLOGICAL DATA FIRST UARTER 1 JOINT FRE UENCY DISTRIBUTIO I PERCENT FOR SPLI-LEVEL REL SES GROUND-LEVEL PORTIO SECTOR SIABI LITT CLASS E MINO SPEEOS IN HETERS PER SECOND FROH THE SECTORS INOICATEO 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS N NNE NE ENE E ESE SE SSE S SSM SM WSW W NM NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.005 0.005 0.006 0.016 0.023 0.012 0.052 0.057 0.019 0.025 0.030 0.007 0.013 0.002 0.001 0.011 0.027 0.047 0.016 0.026 0.015 0.044 0.131 0.146 0.109 0.029 0.068 0.033 0.017 0.020 0.010 0.048 0.040 0.031 0.007 0.000 0.006 0.059 0.040 0.167 0.293 0.029 0.028 0.057 0.005 0.013 0.047 0.068 0.026 0.031 0.016 0.000 0.000 0.000 0.017 0.189 0.464 0.176 0.000 0.031 0.018 0.056 0.086 0.118 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.078 0.000 0.000 0.000 0.000 0.000 0.049 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.098 0.114 0.045 0.042 0.044 0.116 0.240 0.559 0.963 0.259 0.126 0.128 0.053 0.091 0.193 0.245 TOTALS 0.000 0.001 0.284 0.786 0.890 1.228 0.127 0.000 0.000 3.317 SECTOR STABILITY CLASS F WINO SPEEDS IN HETERS PER SECONO FROM THE SECTORS INOICATEO 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS NNE NE ENE E ESE SE SSE S SSM SW WSM W WNW NW NNW 0.000 0.000 0.000 0.000 0.000 0.001 0.002 0.002 0.001 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.000 o.ooo 0.006 0.005 0.003 0.012 0.000 0.000 0.000 0.000 0.000 0.000 0.009 0.002 0.013 0.004 0.002 0.040 0.150 0.109 0.039 0.031 0.029 0,006 0.000 0.000 0.000 0.027 0.052 0.042 0.000 0.001 0.003 0.026 0.141 0.162 0.154 0.017 0.007 0.007 0.000 0.004 0.000 0.035 0.023 0.020 0.008 0.000 0.000 0.000 0.050 0.233 0.217 0.000 0.000 0.000 0.000 0.000 0.000 0.024 0.000 0.000 0.000 0.000 0.000'0.009 0.000 0.107 0.507 0.000 0.010 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.084 0.064 0.021 0.006 0.005 0.076 0.349 0.618 0.921 0.061 0.046 0.013 0.000 0.004 0.000 0.086 TOTALS 0.007 0.027 0.461 0.651 0.575 0.633 0.000 0.000 0.000 2.354 0506c

'FN Rad Impact 1st Half 1988 Page 26 of 50 TABLE 3B (Page 4 of 4)BROGANS FERRY NUCLEAR PLANT METEOROLOGICAL DATA FIRST UARTER 1 JOINT FRE UE CY DISTRIBUTION IN PERCENT OR SPLIT-LEVE RELE S S G 0-LEVEL POR IO SECTOR STABILITY CLASS 0 KINO SPEEOS IN HETERS PER SECONO PRON THE SECTORS INOICATEO 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS'NNE NE ENE E ESE SE SSE S SSM Sw KSK W MNM NM NNM 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 TOTALS 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.005 0.000 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.008 0.001 0.000 0.003 0.000 0.012 0.004 0.036 0.273 0.049 0.008 0.000 0.000 0.000 0.000 0.000 0.004 0.000 0.004 0.000 0.009 0.006 0.000 0.027 0.415 0.078 0.000 0.000 0.000 0.000 0.000 0.000 0.002 0.000 0.008 0.000 0.000 0.000 0.000 0.000 0.388 0.044 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.183 0.103 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.012 0.003 0.009 0.018 0.004 0.063 1.264 0.274 0.008 0.000 0.003 0.000 0.000 0.000 0.006 0.390 0.541 0.440 0.286 0.000 0.000 0.000 1.665 0506c UFN Rad Impact 1st Half 1988 Page 27 of 50 1 TABLE 3C (Page 1 of 4)BROWHS FERRY NUCLEAR PLA METEOROLOGICAL DATA FIRST UARTER 1 JOINT FRE UENCY DISTRIBUTION IN PERCENT OR SP-LEVEL RELEASES ELEV T D PO 0 SECTOR STABILITY CLASS A MIND SPEEDS IN NETERS PER SECOND PRON THE SECTORS INDICATED 0.13 0.45 1.10 1'9 2.88 4'5 6.91 9.59 10.95 TOTALS N NNE NE ENE E ESE SE SSE S SSM SW MSM W'HNM NW NNH 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 TOTALS 0.000 0.000 0.000 0~000 0~000 0~000 0.000 0.000 0.000 0.000 SECTOR STABILITY CLASS 8 MIND SPEEDS IN NETERS PER SECOND PRON THE SECTORS INDICATED 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS N NNE NE ENE E ESE SE SSE S SSK SW H 5'H HNH NW NNM 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0,000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0,048 0.048 0.000 0.000 0.000 0.000 0,000 0.000 0.000 0.000 TOTALS 0.000 0.000 0.096 0.000 0.000 0.000 0.000 0.000 0.000 0.096 0506c BFN Rad Impact 1st Half 1988 Page 28 of 50 TABLE 3C (Page 2 of 4)BROWNS FERRY NUCLEAR PLANT METEOROLOGICAL DATA JO FIRS UARTER 1 FRE UE CY DISTRIBUTIO IN PERCE FOR SPLI-EVEL RELEASES ELEVATED PORT 0 SECTOR ST ABI L I I r CLASS 0 KINO SPEEOS IN HEIERS PER SECOND PRON THE SECTORS INOICATEO 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TO'TALS N NNE NE ENE E ESE SE SSE S SSW SK WSW K WNW NM NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048 0.000 0.000 0.097 0.000 0.000 0.000 0.000 0,000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.045 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.085 0.041 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.040 0.040 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048 0.048 0.000 0.000 0.097 0.000 0.170 0.081 0.000 0.000 TO'IALS'0.000 0.000 0.048 0.145 0.045 0.126 0.080 0.000 0.000 0.444 SECTOR STAOILITr CLASS 0 WINO SPEEOS IN HETERS PER SECONO FROH IHE SECTORS INOICATEO 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS N NNE'E ENE E ESE SE SSE S SSW SM WSW M WNW NM NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048 0.000 0.048 0.000 0.048 0.000 0.048 0.048 0.048 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.193 0.097 0.048 0.091 0.097 0.145 0.387 0.290 0.193 0.242 0.145 0.048 0.242 0.091 0.097 0.000 0.773 0.773 0.483 0.193 0.242 0.338 0.773 0.145 0.242 0.242 0.387 0.290 0.580 0.435 0.677 0.387 0.937 0.939 0.604 0,464 0.047 0.140 0.328 0.188 0.186 0.181 0.187 0.046 0.276 0.555 0.326 0.890 1.942 1.908 0.925 0.307 0.254 0.215 0.512 0.391 0.798 0.848 0.663 0.795 1.311 1.600 2.311 1.892 1.887 0.674 0.000 0.000 0.000 0.079 0.275 1.095 1.525 0.507 0.355 0.392 0.199 2.002 3.289 1.808 0.183 0.000 0.000 0.000 0.000 0.000 0.000 0.401 0.507 0.191 0.064 0.074 0.047 0.462 0.668 0.038 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.029 0.085 0.036 0.004 0.000 0.000 0.000 0.007 0.000 5.964 4.392 2.108 1.061 0.688 0.917 2.323 2.588 3.585 2.301 1.805 1.645 2.656 5.152 7.315 5.016 TO'IALS 0.000 0.336 2.418 6.961 6.301 16.675 14.089 2.636 0.161 49.578 0506c BFN Rad Impact 1st Half 1988 Page 29 of 5O TABLE 3C (Page 3 Of 4)BROWNS FERRY NUCLFAR PLANT METEOROLOGICAL DATA FIRST UARTER 1 JOINT FRE UENCY DISTRIBUTION I PERCENT OR SPLI-L LEASES ELEVATED PORTIO SECTOR STABI LI'TY CLASS E WIND SPEEDS IN HETERS PER SECOND PRON THE SECTORS INDICATED 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS N NNE NE ENE E ESE SE SSE S SSM S'W KSW M'W N M NW NNW 0.004 0.002 0.002 0.002 0.003 0.005 0.010 0.002 0.001 0.000 0.001 0.002 0.002 0.003 0.006 0.002 0.145 o.ooo 0.000 0.000 0.048 0.048 0.097 0.000 0.000 0.000 0.048 0.048 0.000 0.048 0.097 0.048 0.097 0.145 0.145 0.145 0.145 0.242 0.532 0.097 0.048 0,000 0.000 0.097 0.145 0.145 0.242 0.048 0.290 0.145 0.290 0.242 0.193 0.677 0.435 0.290 0.242 0.193 0.097 0.048 0.290 0.145 0.193 0.242 0.696 0.515 0.231 0.279 0.510 0.332 1.025 0.465 0.230 0.092 0.046 0.094 0.230 0.232 0.095 0.421 0.769 0.343 0.603 0.173 0.261 0.549 2.023 1.577 0.919 0.710 0.669 0.548 0.042 0.383 0.296 0.681 0.159 0.080 0.080 0.000 0.000 0.040 0.947 2.318 1.299 0.356 0.159 0.039 0.000 0.000 0.159 0.198 0.000 0.000 0.000 0.000 0.000 0.000 0.108 0.501 0.370 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.032 0.006 0.000 0.000 0.000 0.000 0.000 0.000 0.000 2.160 1.230 1.351 0.841 1.160 l.893 5.178 5.283 3.116 1~351 1.020 0~876 0.709 0~956 1 F 088 1.640 TOTALS 0.047 0.627 2.273 4.013 5.494 10.548 5.835 0.979 0.038 29.855 STABILITY CLASS F WIND SPEEDS IN HETERS PER SECOND FROH THE SECTO SECTOR 0.13 0.45 1.10 1.99 2.88 4.45 6.91 RS INDICATED 9.59 10.95 TOTALS N 0,006 NNE 0.006 NE 0.006 ENE 0.000 E 0.000 ESE 0.013 SE 0.039 SSE 0.006 S 0.000 SSW 0.013 SM 0.006 MSM 0.000 0.000 WNK 0.000 NW 0.000 NNM 0.000 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.048 0.048 0.000 0.000 0.000 0.097 0.290 0.048 0.000 0.048 0.048 0.000 0.000 0.000 0.000 0.000 0.048 0.048 0.000 0.097 0.097 0.097 0.435 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.048 0.000 0.048 0.046 0.236 0.095 O.D92 0.139 0.606 0.046 0.000 0.000 0.092 0.000 0.000 0.045 O.O48 0.000 0.000 0.043 0.174 0.043 0.086 0.089 0.300 0.466 0.084 0.000 0.167 0.131 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.040 0.040 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0,000 0.000 0.000 0.000 0.000 0.000 0,000 0.000 0.000 0.000 0.000 0.000 0.150 0.191 0.464 0.235 0.275 0.435 1.670 0.654 0.124 0.109 0.313 0.131 0.000 0.045 0.096 0.000 TOTALS 0.095 0.096 0.627 0.918 1.493 1.583 0.080 0.000 0.000 4.893 0506c

BFN Rad Impact 1st Half 1988 Page 30 of 50 TABLE 3C (Page 4 of 4)BROWNS FERRY NUCLEAR PLANT MFTEOROLOGICAL DATA FIRST UARTER 1 JOINT FRE UENCY DISTRIBUT 0 I PERCENT FOR SPLIT-LEVEL RELEASES ELEVATED POR IO SECTOR STABIL I IT CLASS 0 WINO SPEEOS IN METERS PER SECONO PROH THE SECTORS INOICAIEO 0.13 0.43 1~10 1~99 2'8 4'3 6.91 9'9 10.93 TOTALS N NNE NE ENE E ESE SE SSE S SSw Sw wSw M WNW NM NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048 0.048 0.048 0.000 0.000 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.097 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.097 0.483 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.094 0.000 0.000 0.311 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.042 0.088 0.043 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.142 0'48 0.187 1.179 0.091 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 IO IALS 0.000 0.192 0.143 0.380 0.603 0.173 0.000 0.000 0.000 1.693 0506c BFN Rad Impact 1st Half 1988 Page 31 of 50 TABLE 3D BROWNS FERRY CLEAR PLANT METEOROLOGICAL DATA IRST UARTER 1 JOINT FRE UENCY DISTRIBUTIO IN PERCENT 0 STACK RELE SES SECTOR STABILITY CLASS 0 MIND SPEEDS IN HETERS PER SECOND PRON THE SECTORS INDICATED 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS NNE NE ENE E ESE SL SSE S SSM SM MSM M MNM NM NNM 0.001 0.001 0.001 0.002 0.001 0.003 0.006 0.003 0.005 0.002 0.003 0.003 0.005 0.002 0.004 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.094 0.094 0.094 0.140 0.094 0.234 0.421 0.)87 0.328 0.140 0.234 0.187 0.281 0.140 0.281 0.094 0.655 0.655 0.468 0.234 0.374 0.702 0.515 0.421 0.281 0.281 0.328 0.328 0.421 0.468 0.374 0.562 0.983 0.983 0.655 0.421 0.515 1.123 0.889 0.562 0.234 0.187 0.328 0.281 0.562 0.655 0.421 0.889 2.293 3.042 2.059 0.983 1.029 0.983 1.451 2.620 1.965 1.497 0.608 0.515 1.357 2.199 2.293 1.685 2.667 1.825 1.029 0.328 0.047 0.421 I.591 5.569 3.884 1.497 1.497 2.480 1.544 2.854 3.744 3.322 0.983 0.421 0.234 0.000 0.000 0.234 1.029 2.620 2.901 0.889 0.468 0.515 0.094 1.825 2.480 0.655 0.000 0.000 0.000 0.000 0.000 0.047 0.328 0.889 1.217 0.562 0.047 0.047 0.140 0.468 0.094 0.000 7~676 7.021 4.540 2.108 2.060 3.747 6.230 12.871 10.815 5.055 3.513 4.403 4.451 8.611 9.691 7.208 TOTALS 0.043 0.094 3.043 7.067 9.688 26.579 34.299 15.348 3.839 100.001 0506c BFN Rad Impact 1st Half 1988 Page 32 of 50 TABLE 4A (Page 1 of 4), BROWNS FERRY NUCLEAR PLA NETEOROLOGICAL DAT SECOND UARTER 1 JOINT FRE UENCY DISTRIBUTIO I PE CE FOR GRO-L S S SECTOR STABILITY CLASS A WINO SPEEDS IH HETERS PER SECOND fROH'IHE SECTORS INOICA TED 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS N NHE NE EHE E ESE SE SSE S SSW SK WSW K WNW HK NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.095 0.237 0.142 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 0.095 l.231 I.089 1.420 0.473 0.284 0.095 0.047 0.000 0.000 0.000 0.047 0.047 0.047 0.000 0.095 0.000 0.000 0.000 0.284 0.142 0.000 0.047 0.095 0.095 0.047 0.000 0.900 1.136 0.521 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.095 0.095 0.426 0.473 0.237 0.473 0.616 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.095 0.616 0.521 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.142 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.420 1.799 0.568 0.047 0.142 0.095 1.326 1.326 1.846 O.ol5 0.284 0.237 0.237 0.ol6 1.136 0.900 TOTALS 0.000 0~000 0.474 4.782 0.946 3.931 2.321 0.142 0.000 l2.596 SECTOR STADT LI TY CLASS 8 WINO SPEEDS IN NETERS PER SECOND f ROM THE SECTORS INDICATED 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS N HNE NE ENE E ESE SE SSE 5 SSW SK WSW WNW NK NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.142 0.284 0.237 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 0.331 0.142 0.379 0.189 0.473 0.142 0.000 0.095 0.095 0.000 0.095 0.095 0.142 0.000 0.000 0.000 0.000 0.000 0.095 0.000 0.047 0.000 0.142 0.142 0.237 0.000 0.142 0.426 0.142 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.142 0.047 0.237 0.568 0.047 0.095 0.095 O.OOD 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.OOD 0.000 0.000 0.047 0.142 0,047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.332 0.61o 0.284 0.047 0.000 Q.047 0.473 0.420 0.711 0.23o 0.567 0.284 0.189 0.52l 1.089 0.094 TOTALS 0.000 0.000 0.757 l.893 0.995 l.798 0.42o 0.047 0.000 5,917 0506c 0

BFN Rad Impact 1st Half 1988 Page 33 of 50 f TABLE 4A (Page 2 of 4)BROWNS FERRY NUCLEAR PLANT METEOROLOGICAL DATA SECOND UARTER JO NT FRE UE C DIS RIBUTIO IN PERCENT OR GRO-LE RELEASES STADT L I I T CLASS C SECTOR WIND SPEEDS IN NETERS PER SECOND f RON THE SECTS 0.13 0~45 I~10 I~99 2~88 4~45 6.91 RS INDI CA i EO 9.59 10.95 TOTALS N NNE NE ENE E ESE SE SSE 5 SSW S'W'r S w W WNW NW NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.284 0.284 0.237 0.095 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 O.DOO 0.000 0.047 0.000 0.284 0.142 0.379 0.189 0.095 0.189 0.189 0.142 0.047 0.000 0.047 0 F 000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 0.095 0.000 0.095 0.379 0.095 0.095 0.095 0.142 0.237 0.095'.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.237 0.000 0.237 0.331 0.095 0.189 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.09f 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.425 0.284 0.142 0,000 0.047 0.000 0.568 0.426 0.663 0.379 0.095 0.568 0.568 0.569 0.520 0.190 TOTALS 0.000 0.000 0.994 1.703 0'95 1.374 0.378 0.000 0.000 5.445 SECTOR STASII.ITT CLASS 0 WIND SPEEDS IN NE'IERS PER SECOND PRON TNE SECTORS INDICATL'0 0.13 0.45 1.10 I~99 2.88 4.45 6.91 9.59 10.95 TOTALS N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 0.000 0.189 0.331 0.000 0.237 0.189 0.284 1.089 1.468 0.900 0.521 0.284 0.237 0.237 0.189 0.142 0.095 0.379 0.237 0.473 0.047 0.284 0.237 0.189 0.521 1.373 0.616 0.616 0.758 0.616 0.568 0.284 0.284 0.521 0.284 0.237 0.142 0.095 0.047 0.237 0.047 0.473 0.047 0.047 0.521 0.379 0.521 1.136 0.331 0.852 0.616 0.663 0.237 0.000 0.000 0.047 O,D95 0.095 0.095 0.000 0.331 0.331 0.189 0.568 0.379 0.095 0.142 0.047 0.000 0.000 0.000 0.000 0.000 O.OOD 0,000 0.000 0.000 0.095 0.095 0.237 0.095 0.000 0.000 0.000 0.000 O.DOO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 0.426 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 2.036 1.610 1.420 0.663 O.f68 0.568 1.562 2.131 2.841 1.326 0.947 1.847 1.705 1.988 2.461 1.184 TOTALS 0.000 0.094 6.393 7.483 5.066 4.499 0.806 0.520 0.000 24.861 0506c

'FN Rad Impact 1st Half 1988 Page 34 of 50 TABLE 4A (Page 3 of 4)BROWNS FERRY NUCLEAR PLANT METEOROLOGICAL DATA SECOND UARTER 1 JOINT FRE UENCY DISTRIBUTION IN PERCENT 0 G OUN-L RELEASES SECTOR STABILITY CLASS E WIND SPEEDS IH HETERS PER SECOND FROH THE SECTORS INDICATED 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9,59 10.95 TOTAl.S H NNE NE ENE E ESE SE SSE S SSW SM WSW'W WNW NM NNW 0.005 0.002 0.003 ,0.003 0.008 0.014 0.019 0.018 0.018 0.007 0.010 0.014 0.004 0.001 0.008 0.008 0.047 0.095 0.095 0.000 0.047 0.047 D.331 0.000 0.189 0.095 0.237 0.095 0.047 0.000 0.189 0.189 0.379 0.095 0.189 0.237 0.616 1.136 1.326 1.515 1.326 0.473 0.663 1.089 0.331 0.095 0.521 0.521 0.568 0.473 0.284 0.047 0.237 0.379 0.284 0.331 0.947 0.237 0.047 0.284 0.568 0.189 D.616 0.568 0.379 0.142 0.521 0.000 0.000 0.047 0.189 0.047 0.805 0.095 0.047 0.189 0.284 0.047 0.142 0.473 0.473 0.331 0.473 0.000 0.000 0.000 0.000 0.047 0.331 0.142 0.000 0.095 0.047 0.047 0.237 0.379 0.000 0.095 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.521 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.851 1.233 1.565 0.287 0.908 1.623 2.149 1.95S 3.617 1.049 1.004 1.766 1.281 0.379 2.234 2.138 TOTALS 0.142 1.703 10.514 6.060 3.408 2.602 0.616 0.000 0.000 25.045 SECTOR STABILITY CLASS WIND SPEEDS IN HETERS PER SECOND FROH THE SECTORS INDICATEO 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS N NNE NE ENE E ESE SE SSE S SSW SM MSW WNW NM KNW 0.020 0.012 0.004 0.009 0.011 0.007 0.013 0.014 0.011 0.003 0.006 0.008 0.006 0.003 0.008 0.008 0.426 0.284 0.095 0.095 0.142 0.142 0.189 0.142 0.189 0.095 0.047 0.095 0.189 0.000 0.237 0.000 0.710 0.379 0.142 0.426 0.473 0.237 0.521 0.663 0.426 D.095 0.284 0.331 0.142 0.189 0.189 0.473 0.568 1.042 0.095 0.095 0.000 0.095 0.000 0.095 0.189 0.047 0.000 0.000 0.095 0.047 0.047 0.521 0.331 0.426 0.095 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.047 0.000 0.000 0.047 0.095 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.095 0.000 D.OOO O.ODO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0,000 0.000 0.000 0.000 0.000 O.OOD 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.DOO 0.000 0.000 2.150 2.190 0.431 0.625 0.626 0.481 0.723 0.914 0.862 0.240 0.337 0.434 0.479 0.239 0.481 1.144 TOTALS 0.143 2.367 5.681 2.937 0.993 0.237 0.000 0.000 0.000 12.358 0506c BFN Rad Impact 1st Half 1988 Page 35 of 50 TABLE 4A (Page 4 of 4)BROWNS FERRY CLEAR PLANT METEOROLOGICAL DATA SECOND UARTER 1 8 JOINT FRE UENCY DISTRIBUTIO IN PERCENT OR GROUND-LEVEL RELEASES SECTOR STABILITY CLASS 0 WIND SPEEDS IN HETERS PER SECOND FROH THE SECTORS INDICATED 0.13 0.45 1.10 1.99 2~88 4.45 6~91 9.59 10~95 TOTALS N NNE NE ENE E ESE SE SSE S SSR SX MS lf K WNN NX NNR 0.043 0.017 0.016 0.015 0.006 0.001 0.002 0.007 0.001 0.001 0.001 0.001 0.003 0.003 O.OD7 0.019 0.994 0.284 0.189 0.331 0.095 0.047 0.142 0.047 0.047 0.047 0.095 0,047 0.095 0.000 0.142 0.426 2.083 0.900 0.947 0.758 0.331 0.047 0.000 0.426 0.047 0.000 0.000 0.000 0.095 0.189 0.379 0.900 0.521 1.705 0.095 0.095 0.000 0,047 0.000 0.047 0.189 0,000 0.000 0.000 0.000 0.000 0.000 0.000 0.142 0.568 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.095 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.OOD 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 3.784 3.570 1.247 I.199 0.432 0.142 0.144 0.527 0.284 0.048 0.096 0.048 0.193 0.192 0.528 1.345 TOTALS 0.143 3.029 7.103 2.699 0.710 0.095 0.000 0.000 0.000 13.779 0506c BFN Rad Impact 1st Half 1988 Page 36 of 50 TABLE 4B (Page 1 of 4)BROMNS FERRY NUCLEAR PLA METEOROLOGICAL DAT SECOND UARTER 1 JOINT FRE UENCY DISTRIBUTION I PERCENT FOR SPLIT-LEVE RELEASES GROU-LEVE PORTIO SECTOR STABILITY CLASS A NINO SPEEDS IN HETERS PER SECOND PRON THE SECTORS INDICATED 0.13 0.45 l.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS k NNE NE ENE E ESE SL SSE S SSN SN NSN NNN NN KNN 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.DOO 0.000 0.000 0.000 0.000 0.000 0.000 0.018 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.023 0.060 0.035 0.024 0.008 0.005 0.000 0.000 0.000 0.000 0.003 0.003 0.005 0.000 0.008 0.000 0.000 0.000 0.075 0.034 0.000 0.009 0.004 0.005 0.002 0.000 0.147 0.188 0.077 0.006 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.017 0.018 0.066 O.D68 0.038 0.130 0.164 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.009 0.185 0.150 0.000 0.000 O.ODO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.110 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.DOO 0.000 0.000 0.000 0.000 0.000 0.000 0.280 0.355 0.082 0.006 0.008 0.000 0.023 0.078 0.110 0.058 0.008 0.031 0.022 0.080 0.255 0.298 TOTALS 0.000 O.DOO 0.018 0.155 0'48 0.625 0.638 0.110 0.000 1.694 SECTOR STABILITY CLASS 8'NIHO SPEEDS IN HL'TERS PER SECOND FROH THE SECTORS INDICATED 0.13 0.45 1.10 I.99 2.88 4.45 6.91 9.59 10.95 TOTALS N NNE NE EHE E ESE SE SSE S SSN SN NS'N N NHN NN NNN 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000~0.000 0.000 0.003 0.001 0.000 0.017 0.012 0.000 0.000 0.000 0.000 0.000 0.009 0.008 0.009 0.000 0.000 D.OOO 0.000 0.000 0.047 0.000 0.000 0.000 0.007 0.006 0.020 0.000 0.023 0.065 0.019 0.005 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.027 0.005 0.028 0.084 0.007 0.026 0.030 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.009 0.030 0.018 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.033 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.058 0.103 0.028 0.005 0.000 0.000 0.003 0.001 0.047 0.017 0.012 0.027 0.012 0.043 0.167 0.025 TOTALS 0~000" 0.000 0.000 0.033 0.106 0.263 0.113 0.033 0.000 0.548 0506c BFN Rad Impact 1st Half 1988 Page 37 of 50 TABLE 4B (Page 2 of 4)BROWNS FERRY NUCLEAR PLANT METEOROLOGICAL DATA SECOND UARTER 1 8 JOINT FRE UENCY D S RIBUTIO IN PERCENT FOR SPL T-LEVEL RELEASES GROU D-LEVEL PORTIO SECTOR STABILITY CLASS C MIND SPEEDS IN HETERS PER SECOND FROH THE SECTORS INDICATED 0.13 0.45 1.10 I~99 2 F 88 4.45 6.91 9.59 10.95 TOTALS NNE NE ENE E ESE SE SSE S SSM SM MSM M MNM NM NNM 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 0.000 0 000 0.000 000 0.000 000 0.000 000 0.000 000 0.000 000 0.000 000 0.000 000 0.008 000 0.000 000 0.000 000 0.000 000 0.003 000 0.000 000 0.000 000 0.000 000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.010 0.000 0.039 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.000 0.004 0.000 0.000 0.000 0.000 0.000 0.035 0.019 0.000 0.017 0.021 0.005 0.008 0.007 0.019 0.039 0.010 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.037 0.043 0.015 0.061 0.010 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.019 0.011 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.081 0.049 0.014 0.000 0.000 0.000 0.010 0.008 0.074 0.019 0.000 0.067 0.021 0.061 0.062 0.022 TOTALS 0~000 0.000 0~011 0.049 0~117 0~210 0.101 0.000 0.000 0.488 SECTOR STABILITY CLASS D MIND SPEEDS IN HETERS PER SECOND PRON THE SECTORS INDICATED 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS N NNE NE ENE E ESE SE SSE S SSM SM KSM M MNM NM NNM 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.002 0.014 0.023 0.005 0.016 0.010 0.003 0.000 0.000 0.000 0.000 0.014 0.003 0.004 0.000 0.017 0.010 0.013 0.034 0.183 0.070 0.041 0.035 0.011 0.001 0.000 0.005 0.051 0.026 0.018 0.011 0,009 0.009 0.081 0.010 0.113 0.026 0.005 0.070 0.028 0.034 0.092 0.034 0.142 0.095 0.097 0.039 0.000 0.000 0.014 0.090 0.049 0.043 0.000 0.063 0.058 0.029 0.086 0.058 0.024 0.040 0.008 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.066 0.033 0.083 0.023 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048 0.345 0.035 0.000 0.000 0.000 0.000 0.000" 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.231 0.164 0.127 0.050 0.026 0.021 0.122 O.157 0.350 0.155 0.056 0.171 0.211 0.442 0.296 0.120 TOTALS 0.000 0.000 0.073 0.441 0.617 0.863 0.277 0.428 0.000 2.699 0506c BFN Rad Impact 1st Half 1988 Page 38 of 50 TABLE 4B (Page 3 of 4)BROWNS FERRY NUCLEA PLANT NETEO OLOGICAL DATA SECOND UARTER 1 JOINT FRE UENCY DISTRIBUTIO IN PERCENT FOR SPLIT-LEVE RELEASES G 0-LEVEL OR 0 STABILITY CLASS C SECTOR MIND SPEEDS IN HETERS PER SECOND FROH THE SECTORS INDICATEO 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TO IALS H NNE NC EHE E ESC SE SSC S SSM SM MSM MKM NM NNM 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.003 0.000 0.004 0.003 0.001 0.000 0.000 0.000 0.000 0.000 0.004 0.000 0.001 0.000 0.010 0.031 0.055 0.129 0.107 0.034 0.023 0.030 0.014 0.001 0.003 0.008 0.052 0.046 0.031 0.004 0.027 o.a38 0.037 0.052 0.146 0.036 0.007 0.036 0.040 0.009 0.043 0.047 0.055 0.017 0.078 0.000 0,000 o.oa7 0.033 0.027 0.384 0.019 0.009 0.035 0.035 0.006 0.019 0.063 0.085 0.059 0.082 0.000 0.000 0.000 0.000 0.044 0.194 0.076 0.000 0.019 0.008 0.007 0.038 0.068 0.000 0.029 0.000 O.ODO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.20&0.000 0.000 0.000 0.000 D.ooo 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 D.OOD 0.000 a.aao 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.196 0.151 0.192 0.004 0.037 0~076 0.128 0.253 0.835 0.168 0.040 0.120 0.097 0.023 0.309 0.186 TOTALS 0.001 0.011 0.450 0.651 0.787 0.680 0.235 0.000 0.000 2.815 STABILITY CLASS F SECTOR'MIND SPEEDS IN NET ERS PER SECOND F ROH THC SECTORS INOICAT CO 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95'I 0 I A L S NNC HE ENE E ESC SC SSE S SS'M Sw'MSM M MNM NW NNM 0.000 0.000 O.DOD 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 D.DOO 0.000 a.ooo 0.000 0.000 0.000 0.000 0.000 D.ooo 0.000 0.000 0.000 0.000 0.000 0.006 0.001 0.000 0.000 0.000 0.000 0.000 0.036 0.015 0.010 0.006 0.004 0.012 0.016 0.022 0.044 0.000 0.000 0.012 0.002 0.002 0.000 0.020 0.074 0.140 0.013 0.007 0.000 0.004 0.000 0.021 0.036 0.009 0.000 D.ooa 0.007 0.003 0.005 0.061 0.055 0.070 0.016 0.000 0.000 0.000 0.000 0.000 0.020 0.000 0.000 D.ooo 0.006 0.000 0.000 0.007 0.018 0.009 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.015 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.183 0.234 0.039 0.013 0.004 0.016 0.01&0.043 0.100 0.015 0,001 0.012 0.015 0.005 0.005 0.103 TOTALS O.DOO 0.007 0.201 0.380 0.174 0.042 0.000 0.000 0.000 0.804 0506c

BFN Rad Impact 1st Half 1988 Page 39 of 50 TABLE 4B (Page 4 of 4)BRO S FERRY NUCLEAR PLANT METEOROLOGICAL DATA SECOND UARTER 1 8 JOI FRE UENCY DISTRIBUTION IN PERCE OR SPLI-LEVE RELE S S GROUND-LEVEL PORT10 SECTOR STADTLITT CLASS 0 KTND SPEEDS TH HETERS PER SECOND FROH THE SECTORS TNDlCATED 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS N NNE NE ENE E ESE SE SSE S SSK SK KSK K N'K NN'K 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.058 0.045 0.014 0.004 0.004 0.000 0.000 0.023 0.008 0.000 0.000 0.000 0.002 0.004 0.014 0.023 0.051 0.238 0.015 0.007 0.000 0.006 0.000 0.010 O.D35 0.000 0.000 0.000 O.OOD 0.000 0.000 0.000 0.023 0.098 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.018 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.132 0.399 0.029 0.011 0.004 0.006 0.000 0.033 0.043 0.000 0.000 0.000 0.002 0.004 0.014 0.023 TOTALS 0.000 0~000 0~199 0'62 0'21 0'18 0~000 0.000 0.000 0.700 0506c

" BFN Rad Impact 1st Half 1988 Page 40 of 50 TABLE 4C (Page 1 of 4)BROWNS FERRY NUCLEAR PLANT METEOROLOGICAL DATA SECO D UARTER 1 JOINT FRE UENCY DISTRIBUTIO IN PERCENT FOR SPLIT-LEVEL RELEASES ELEV D OR 0 SECTOR STABI LITT CLASS A WIND SPEEDS IN HETERS PER SECOND PRON THE SECTORS INDICATEO D~13 0~43 1~10 I~99 2~88 4~43 6~91 9.39 10.93 TOTALS NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 D.OOO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 D.OOO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.DOO TOTALS 0.000 0.000 0.000 0.000 0~000 0~000 0~000 0.000 0.000 0.000 SECTOR STABILITT CLASS 8 WIND SPEEDS IN HEI ERS PER SECOND PROH THE'ECTORS INDI CAT ED 0.13 0.43 1.10 1.99 2.88 4.43 6.91 9.$9 10.93 TOTALS NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048 0.000 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.DOO 0.000 0.000 0.000 0.000 0.000 0.048 0.048 0.000 0.048 0.048 0.000 0.000 0.000 0.000 0.000 TOTALS 0.000 0.000 0.096 0.096 0.000 0.000 0~000 0.000 0.000 0.192 0506c BFN Rad Impact 1st Half 1988 Page 41 of 50 TABLE 4C (Page 2 of 4)BROMNS FERR CLEAR PLA METEOROLOGICAL DATA SECOND UARTER 1 JOINT FRE UENCY DISTRIBUTION I PERCENT FOR SPL-LEVEL RELEASES ELEVATED PORT 0 SECTOR STADILITY CLA55 C WIND SPCCOS IN HCTCRS PER SECOND FROH THE SECTORS INDICATED 0.13 0.45 1~10 1~99 F 88 4'5 6'1 9 F 59 10'5 TOTALS H NNE NE CNE E ESC SE SSE 5 SSW SW NSW K WNW NW NNW 0.000 0.000 0.000 0.000 0.000.O.DOO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 D.OOO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.096 0.144 0.048 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.144 0.144 0.000 0.144 0.192 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.045 0.048 0.092 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.042 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.081 0.000 0.000 0.000 0.038 0.000 0.000 0.000 0.000 0.000 0.000 0.000 O.OOD 0.039 0.079 0.000 0,039 0.000 0.000 0.000 0.038 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.076 0.042 0.000 0.045 0.048 0.332 0.288 0.048 0.192 0.278 0.127 0.000 0.120 0.000 0.000 TOTALS 0.000 0.000 0.336 0'72 0.232 0.123 0.195 0.038 0.000 1.$96 SECTOR STABILITY CLASS D WIND SPCEOS IN HETERS PER SECOND FROH TNE SECTORS INOICA ICD 0'3 0.45 1~10 1.99 2 F 88 4'5 6.91 9.$9 10.95 TOTALS N NNE NC CNE E ESC SE SSE 5 SSN SW NSW K WNW NK NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048 0.048 0.000 0.000 0.000 0.048 0.048'.000 0.048 0.000 0.048 0.000 0.000 0.000 0.048 0.096 0.144 0.144 0.096 0.240 0.384 0.911 0.623 0.911 0.144 0.336 0.048 0.192 0.144 0.096 0.000 0.144 0.144 0.144 0.144 0.096 0.479 1.438 1.630 0.623 0.623 1.198 0.815 0.671 0.671 0.623 0.192 0.368 0.324 0.606 0.046 0.091 0.234 0.701 1.06$0.228 0.322 0.182 0.284 0.974 0.$97 0.690 0.370 1.634 1.631 1.288 0.301 0.131 0.130 0.128 1.142 0.657 0.910 1.006 O.il 71 0.467 1.086 2.208 0.84$1.177 1.802 0.158 0.159 0.000 0.000 0.1$6 0.467 l.396 0.699 0.5$0 0.386 0.275 0.313 0.970 O,f43 0.279 0.425 0.000 0.000 0.000 0.000 0.09f 0 040 0.595 0.304 0.023 0.000 0.022 0.079 0.$61 0.264 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.010 0.022 0.000 0.000 0.000 0.014 0.026 0.000 0.020 3.698 4.$18 2.388 0.746 0.$$8 1.227 3.477 5.025 4.432 3.0$0 3.295 1.7$2 2.615 2.916 5.148 2.282 TOIALS 0.000 0.336 4.509 9.63$7.082 13.73$9.05l 2.687 0.092 47.126 0506c

'FN Rad Impact 1st Half 1988 Page 42 of 50 TABLE 4C (Page 3 of 4)BRO S FERRY NUCLEAR PLANT METEOROLOGICAL DATA SECOND UARTER 1 8 JOINT FRE UENCY DISTRIBUTIO IN PERCENT FO SPL T-LEVEL RELEAS S ELEVATED PORTIO SECTOR STABILITY CLASS lflNO SPEEDS IN NETERS PER SECOND FRON THE SECTORS INOICATEO 0.13 0.45 1.10 1.99 2~88 4'5 6.91 9.59 10.95 TOTALS N NNE HE ENE E ESE SE SSE S SSW SN lfSW RNlf NN NNlf 0.002 0.003 0.004 0.002 0.003 0.005 0.009 0.006 0.003 0.002 0.001 0.002 0.002 0.002 0.003 0.001 0.096 0.048 0.048 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.096 O.OOD 0.048 0.096 0.240 0.384 0.192 0.288 0.479 1.007 0.623 0.336 0.240 0.096 0.240 0.192 0.096 0.288 0.096 0.144 0.240 0.192 0.336 0.384 0.240 0.911 0.623 0.575 0.623 0.336 0.575 0.623 0.096 0.575 0.336 0.462 0.324 0.091 0.092 0.188 0.187 0.504 0.468 0.278 0.047 0.325 0.227 0.421 0.277 0.319 0.417 0.974 1.707 0.877 0.254 0.126 0.254 0.334 0.338 0.541 0.505 0.385 0.170 0.258 0.259 0.673 0.711 0.196 0.078 0.356 0.000 0.000 0.000 0.078 0.158 0.470 0.314 0.236 0.039 0.039 0.000 0.039 0.118 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.096 0.026 0.000 DTOOO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.970 2.640 1.952 0.816 0.989 1.213 2.843 2.216 2.299 1.757 1.379 l.253 I.535 0.826 1.897 1.727 TOTALS 0.050 0.384 4.893 6.809 4.627 8.366 2.121 0.122 0.000 27.311 SECTOR STABILITY CLASS F WINO SPEEDS IN NETERS PER SECOND FROH TNE SECTORS INOICATEO 0.13 0.45 1.10 1.99 2.88 4.45 6.91 9.59 10.95 TOTALS H HHE NE EHE E ESE SE SSE S SSN SN lfSW HNH NN HKM 0.002 0.004 0.004 0.004 0.002 0.004 0.004 0.010 0.010 0.010 0.010 0.008 0.002 0.010 0.004 0.004 0.000 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.048 0.048 0.000 0.000 0.000 0.048 0.000 0.000 0.048 0.096 0.096 0.048 0.048 0.096 0.096 0.240 0.192 0.192 0.240 0.192 0.048 0.192 0.096 0.096 0.288 0.048 0.096 0.000 0.192 0.288 0.288 0.192 0.288 0.048 0.240 0.096 0.096 0.240 0.240 0.048 0.230 0.047 0.091 0.185 0.186 0.000 0.000 0.138 0.095 0.046 0.047 0.188 0.140 0.138 0.140 0.047 0.385 1.247 0.496 0.337 0.044 0.044 0.000 0'86 0.044 0.043 0.044 0.044 0.043 0.128 0.088 0.086 0.080 0.198 0.158 0.040 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.033 1.640 0.941 0.662 0.472 0.432 0.388 0.666 0.677 0.387 0.581 0,528 0.329 0.156 0.568 0.281 TOTALS 0.092 0.192 2.016 2.688 1.718 3.159 0.476 0.000 0.000 10.341 0506c

BFN Rad Impact 1st Half 1988 Page 43 of 50 TABLE 4C (Page 4 of 4)BROWNS FERRY NUCLEAR PLANT METEOROLOGICAL DATA SECOND UARTER 1 8 JOI FRE UE CY DISTRIBUTION IN PERCE OR SPLIT-LEVEL RELEAS S ELEVATED PORT 0 STASTLTTT CLASS 0 SECTOR WlNO SPEEDS TN HETERS PER SECOND FROH THE SECTORS 1NOICATED 0.13 0.45 1.10 1.99 2'8 4.45 6.91 9.59 10.95 TOTALS N NNE NE ENE E ESE SE SSE S SSW SW'WSW W WNW NW NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.048 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048 0.000 0.048 0.192 0.096 0.048 0.000 0.096 0.000 0.000 0.000 0.000 0.000 0.096 0.048 0.000 0.048 0.096 0.048 0.000 0.144 0.144 0.000 0.000 0.048 0.048 0.000 0.096 0.048 0.048 0.046 0.140 0.047 0.046 0.000 0.048 0.045 0.093 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.043 0.412 0.459 0.044 0.044 0.000 0.000 0.043 0.000 0.084 0.000 0.000 0.042 0.000 0.000 0.043 0.000 0.276 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.187 0.782 0.647 0.187 0.186 0.096 0.240 0.376 0.333 0.084 0.096 0.048 0.136 0.046 0.096 0.091 TOTALS 0.000 0.144 0.528 0.864 0'05 F 214 0'76 0~000 0~000 3.631 GROUND-LEVEL RELEASES a 9.7 PERCENT ELEVATED RELEASES%90.3 PERCENT 0506c

BFN Rad Impact 1st Half 1988 Page 44 of 50 TABLE 4D BRO S FERRY NUCLEAR PLANT METEOROLOGICAL DATA SECOND UARTER 1 JOINT FRE UENCY DISTRIBUTION I PERCENT OR STACK RELEASES SECTOR STABILITY CLASS 0 NIHO SPEEDS IH HETERS PLR SECONO FROH THE SECTORS INOICATEO 0.13 0.4$1.10 1.99 2.88 4.4$6.91 9.$9 10.9f TOTALS N NNE NE EHE E ESE SE SSE S SSlf SH If 5N N lfNlf HNN 0.012 0.002 0.010 0.006 0.020 0.024 0.028 0.039 0.037 0.033 0.024 0.012 0.004 0.010 0.008 0.010 0.093 0.000 0.000 0.000 0.047 0.047 0.000 0.047 0.047 0.047 0.000 0.000 0.047 0.093 0.000 0.047 0.187 0.047 0.234 0.140 0.421 0.$14 0.654 0.841 0.794 0.701 0.$61 0.280 0.047 0.140 0.187 0.187 0.327 0.421 0.140 0.421 0.280 0.f14 1.963 1.636 1.402 0.607 1.402 0.981 1.028 0.6$4 0.888 0.421 0.374 0.421 0.794 0.327 0.374 0.701 l.49f 1.402 0.701 0.654 0.794 0.748 1.3$$1.729 o.ef4 0.935 2.103 2.103 2.383 1.121 0.93$0.794 2.1$0 2.196 1.21$1.121 1.028 1.215 1.49$2.664 2.710 1.682 3.e92 4.579 2.804 0.748 0.280 0.374 0.467 0.888 2.$23 2.009 2'09 O.f14 0.607 0.888 2.243 l.215 0 F 888 1.776 0~981 0~421 0 F 000 0 F 000 0.607 0.280 1.$42 0'3f 0 F 888 0.748 0.234 0.187 1.21$0.701 0.000 0.093 0.047 0.000 0.000 0.000 0.000 0.140 0.467 0'21 0.047 0 F 000 0.140 0'67 0.467 0.280 7.676 9.442 7.393 3.184 2.3$7 2.968 7.3e4 7~469 8.728 6.528 6.753 4.498 4.9$7 6.832 8.372 5.478 TOTALS 0.279 0.51$$.93513.085 13.458 26.91525.840 11.403 2.569 100.001 0506c

TABLE 5 BROWNS FERRY NUCLEAR PLA-RECEPTOR LOCATIONS AND POINTS OF INTEREST POI DISTANCE SECTOR m POINT DISTANCE SECTOR m Site Boundary Site Boundary Site Boundary Site Boundary Site Boundary Site Boundary Site Boundary Site Boundary Air Dose Point Air Dose Point Air Dose Point Resident Resident Resident, Garden Resident Resident, Garden Resident Resident Resident, Garden Garden Garden Garden Garden Garden Milk Cow Child Goat Child N 1525 NE 1250 E 1375 SE 5600 S 2550 SW 2300 W 2550 HW 2275 HW 5100 NW 6100 NW 6800 N 1620 NE 4075 E 4437 SE 8100 S 4460 SW 4896 W 2550 NW 3500 N 3290 NNE 2980 ESE 4590 SW 5430 NHW 1830 ENE 9450 NE 10975 Site Boundary Site Boundary Site Boundary Site Boundary Site Boundary Site Boundary Site Boundary Site Boundary Air Dose Point Air Dose Point Air Dose Point Resident Resident, Garden Resident Resident Resident, Garden Resident, Garden Resident, Garden Resident Garden Garden Garden Garden Milk Cow Child Milk Cow Child NNE 1300 ENE 1450 ESE 1575 SSE 2875 SSW 2425 WSW 2500 WHW 3325 NHW 1650 NW 5500 HW 6500 NW 7100 NNE 2845 ENE 1960 ESE 4655 SSE 7155 SSW 4155 WSW 4131 WNW 4425 NNW 1650 NE 3980 E 3980 SSE 7190 W 3520 N 8045 NNW 10975 TABLE 6 FIVE-YEAR

SUMMARY

OF UARTERLY DOSES*Air Submersion Real Pathway Air-Air-B Sk n TB Max Or an Year QTR mrad mrad mrem mrem mrem Liquid Effluents TB'ax Or an mrem mrem 1983 1984 3.18.34.16 4.39.85.24 1.39.66.47 2 1.19 2.09 1.48 3.51.98.48 4.30.58.17.10.14.30.98.31.10.30.04.41.09.08.06 Bone Thyroid Thyroid Thyroid Thyroid Thyroid.25.00.58.11.10.31.33 Liver.00 Liver.79 Liver.15 Liver.12 Liver.41 Liver 1985.07.12<.001<.001<.001<.001<.001<.001.10<.001 0.0 0.0.06<.001 0.0 0.0.03.017.01.01 Thyroid Bone Bone Bone.09.18.05.10.12 Liver.24 Liver.07 Liver.14 Liver 1986<.001<.001<.001<.001<.001<.001<.001<.001 0.0<.001 0.0 0.0 0.0.01<.001<.001 0.0<.001 0.0<.001 Bone Liver Liver Liver.08.23.15.03.11 Liver.31 Liver.19 Liver.04 Liver<.001<.001<.001<.001<.001<.001<.001<.001<.001<.001 0.0<.001<.001<.001 0.0<.001.0015 GI Tract.0024 GI Tract.0037 GI Tract.0071 Liver.02.05.06.09.02 Liver.07 Liver.07 Liver.12 Liver 1988 1<.001<.001<.001 2<.001<.001<.001<.001<.001.0001 GI Tract.0051 GI Tract.02.13.03 Liver.17 Liver*Note: All calculated doses are below limits specified in Appendix I to 10 CFR 50.

BFN Rad Impact 1st Half 1988 Page 47 of 50 FIGURE 1 PATHWAYS TO MAN FROM NUCLEAR PLANT EFFLUENTS C O E CO~qh l f~r"p~4 Milk ond 8oof lngootlon Ground ExP OoQT~io i>O O Q 0 o~Cp O~0506c

BFN Rad Impact 1st Half 1988 Page 48 of 50 e FIGURE 2 BFN Airborne Effluents Fission Gases Released and Resulting Doses Legend BFN releases Gamma dose m 500000 O D 4M000 0 0 P o 300000 8 0 200000 K 1 I'I I l I I I I I I I I I I I I I I I I I I I I l I I I I 1 I I I I I I I I I I I I I I l I I I I I I I 3.0 E 2.5~E n 0 2,0 1.5 1.0......Beta dose 80 81 82 N 84 85 88 87 88(current)

FIGURE 3 BFN Rad Impact 1st Half 1988 Page 49 of 50 BFN Airborne Effluents lodines and Particulates Released and Resulting Doses Legend BFN releases.40 D Q.20 I I L a 0~o'g.25 0 Q.0 0.15 C 0.10 40 xo E E 2,5 a C 0 2.0 P 0 1.5 1,0 Maximum organ dose 81 82 84 88 88{cummt)N 85 87 BFN Rad Impact 1st Half 1988 Page 50 Of 50 FIGURE 4 BFN Liquid Effluents Fission and Activation Products Released and Resulting Doses Legend BFN releases Total body dose I I I I I I t t t 1 I I 1 1 1 1 I I 1 1 1 1 I 1 I 1 1 I I~+~1 1'1 1 1 1 1 t2 E E a 0 A...Maximum organ dose 88 (current)87

ENCLOSURE 2 TENNESSEE VALLEY AUTHORITY BROWNS FERRY NCULEAR PLANT INOPERABLE RADIOACTIVE EFFLUENT INSTRUMENTATION REPORT JANUARY THROUGH JUNE 1988

Ino erable Radioactive Effluent Instrumentation Re ort This report is to comply with Radiological Effluent Technical Specifications (RETS)sections 3.2.D.2 and 3.2.K.2 reporting requirements for instruments that are inoperable for more than 30 days.The RETS became effective at BFN on May 6, 1987.This report covers the period from January 1-June 30, 1988.Because of significant technical specification changes, a large number of radioactive effluent monitoring instruments became technically inoperable on May 6, 1987.RETS were incorporated during a BFN administrative outage.Site resources were, and still are endeavoring to resolve previously identified problem areas.Modifications required to bring BFN effluent monitoring equipment into technical compliance with RETS compete for resources with other regulatory driven modifications.

This report explains why the inoperability of each instrument was not corrected in a timely manner.The instruments that were inoperable for more than 30 days are: RHR service water monitor (1-RM-90-133)

RHR service water monitor (1-RM-90-134)

RHR service water monitor (2-RM-90-133)

RHR service water monitor (2-RM-90-134)

RHR service water monitor (3-RM-90-133)

RHR service water monitor (3-RM-90-134)

Raw cooling water monitor (1-RM-90-132)

Raw cooling water monitor (2-RM-90-132)

Raw cooling water monitor (3-RM-90-132)

Liquid radwaste effluent monitor (0-RM-90-130)

Liquid radwaste effluent flow rate (77-60 loop)0151m/4 Stack effluent flow meter (0-FE-90-271)

Stack effluent monitor (0-RM-90-147A)

Stack effluent monitor (0-RM-90-147B)

Off Gas Post Treatment noble gas activity monitor Off Gas Post Treatment noble gas activity monitor Off Gas Post Treatment noble gas activity monitor Off Gas Post Treatment noble gas activity monitor Off Gas Post Treatment noble gas activity monitor Off Gas Post Treatment noble gas activity.monitor (1-RM-90-265)

(1-RM-90-266)

(2-RM-90-265)

(2-RM-90-266)

(3-RM-90-265)

(3-RM-90-266)

During the entire reporting period, fuel was off loaded from all three units and all compensatory sampling requirements were met.0151m

t Li uid Process Radiation Monitors BFN RETS Table 3.2.D requires Residual Heat Removal (RHR)service water monitors (l-RM-90-133, 1-RM-90-134, 2-RM-90-133, 2-RM-90-134, 3-RM-90-133, and 3-RM-90-134) and raw cooling water monitors (1-RM-90-132, 2-RM-90-132, and 3-RM-90-132) to be operable when these systems are in service.Contrary to this requirement, these nine monitors were not available for operation during the entire reporting period.These monitors were'ot available for operation because they were not designed to meet the requirements in RETS Table 4.2.D, Footnote 2.This footnote requires that control room annunciation occur if instrument controls are not set in operate mode.Design Change Request (DCR)1687 Rl, was written to correct this problem and was approved on September 29, 1986.Engineering l Change Notices (ECNs)P0976 (Unit 1), P0977 (Unit 2), and P0978 (Unit 3)were approved on January 4, 1988, resolving various design problems.An additional design concern has been identified involving the RHR service water monitors.A DCR is being prepared to replace inadequate flow switches.0151m Li uid Radwaste Effluent Instrumentation BFN RETS Table 3.2.D requires the liquid radwaste effluent monitor (0-RM-90-130) and flow rate (77-60 loop)to be operable during liquid radwaste releases.Contrary to this requirement, these two instruments were inoperable during the ma)ority of this reporting period.The liquid radwaste effluent monitor was declared inoperable because it does not meet the requirements in RETS Table 4.2.D, Footnote 1.Footnote 1 requires automatic isolation to occur if the instrument encounters an inoperative/downscale failure.The monitor was, however, in service and would have alarmed causing operator action to terminate release.Additionally, the required supplemental sampling requirements were performed.

DCR 3417 Rl was written to correct this problem and was approved on February 6, 1987.ECN 5523 was issued June 18, 1987.The modification is complete and the liquid radwaste effluent monitor (90-130)and flow rate loop (77-60)were returned to service on June 30, 1988.0151m Ef fluent Instrumentatio The stack effluent noble gas monitors (0-RM-90-147A and B)and the stack effluent flow meter (0-FE-90-271) were inoperable during this reporting period.BFN RETS Table 4.2.K, Footnote 1 requires that the stack noble gas monitors be calibrated using National Bureau of Standards (NBS)traceable radioactive standards.

NBS traceable primary calibrations were completed on April 13, 1987.Operability is dependent upon using this primary calibration information in the performance of periodic surveillance instructions (SIs).The upgraded SIs incorporating the new calibration results were delayed in being approved due to new procedural format and walkdown requirements.

All applicable surveillance instructions have now been approved.A modification to include pressure and temperature compensation for the stack low rate instrument (0-FE-90-271)(ECN 5451)is presently being worked.These components will not be operable by August 31, 1988, as previously reported, due to the recent discovery of a failed internal power supply for the sample flow element.The delivery time for a replacement power supply is 4 weeks.Upon completion of ECN 5451, replacement of failed power supply (DCN H1506A), and required SI testing, the stack effluent monitors (0-RM-90-147A and B)will be declared operable.Fuel was off-loaded for all three units during this period.Results of compensatory lab analyses of stack effluent indicated no anomolies.

0151m

Off Gas Post Treatment BFN RETS Table 3.2.K requires the off gas post treatment noble gas activity monitors (l-RM-90-265, 1-RM-90-266, 2-RM-90-265, 2-RM-90-266, 3-RM-90-265, and 3-RM-90-266) to be operable at all times.Table 4.2.K requires performance of functional tests and channel calibrations for these radiation monitors.Contrary to the requirements of Table 4.2.K, functional tests and channel calibrations had not been performed and the instruments were taken out of service.Approval of upgraded surveillance instructions for these monitors was delayed due to enhanced format and walkdown requirements.

In addition to procedure problems, sample pump problems were also encountered.

All off gas post treatment monitors were operable by May 5, 1988.The off gas systems were not in service during this period.

.v'