ML093370260

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Final Safety Analysis Report, Amendment 95, Chapter 2, Section 2.0 Through 2.3-128
ML093370260
Person / Time
Site: Watts Bar Tennessee Valley Authority icon.png
Issue date: 11/24/2009
From:
Tennessee Valley Authority
To:
Office of Nuclear Reactor Regulation
References
Download: ML093370260 (227)
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Text

Table of Contents 2-iWATTS BARWBNP-76TABLE OF CONTENTS SectionTitle Page004_TVA_WB_FSAR_Section_2_A.pdf005_TVA_WB_FSAR_Section_2_B.pdf 005_TVA_WB_FSAR_Section_2_B.pdf2.0SITE CHARACTERISTICS2.1GEOGRAPHY AND DEMOGRAPHY2.1-12.1.1Site Location and Description2.1-12.1.1.1Specification of Location2.1-1 2.1.1.2Site Area Map2.1-12.1.1.3Boundaries for Establishing Effluent Limits2.1-22.1.2Exclusion Area Authority And Control2.1-22.1.2.1Authority2.1-22.1.2.2Control of Activities Unrelated to Plant Operation2.1-22.1.2.3Arrangements for Traffic Control2.1-22.1.2.4Abandonment or Relocation of Roads2.1-22.1.3Population Distribution2.1-22.1.3.1Population Within 10 Miles2.1-3 2.1.3.2Population Between 10 and 50 Miles2.1-32.1.3.3Transient Population2.1-42.1.3.4Low Population Zone2.1-4 2.1.3.5Population Center2.1-52.1.3.6Population Density2.1-52.2NEARBY INDUSTRIAL,TRANSPORTATION, AND MILITARY FACILITIES2.2-12.2.1Location and Route2.2-12.2.2Descriptions2.2-1 2.2.2.1Description of Facilities2.2-12.2.2.2Description of Products and Materials2.2-12.2.2.3Pipelines2.2-1 2.2.2.4Waterways2.2-12.2.2.5Airports2.2-22.2.2.6Projections of Industrial Growth2.2-2 2.2.3Evaluation of Potential Accidents2.2-22.2.

3.1REFERENCES

2.2-32.3METEOROLOGY2.3-12.3.1Regional Climate2.3-12.3.1.1Data Sources2.3-1 2.3.1.2General Climate2.3-12.3.1.3Severe Weather2.3-22.3.2Local Meteorology2.3-52.3.2.1Data Sources2.3-52.3.2.2Normal and Extreme Values of Meteorological Parameters2.3-62.3.2.3Potential Influence of the Plant and Its Facilities on Local Meteorology2.3-82.3.2.4Local Meteorological Conditions for Design and Operating Bases2.3-92.3.3Onsite Meteorological Measurements Program2.3-9 2-iiTable of ContentsWATTS BARWBNP-76TABLE OF CONTENTS SectionTitle Page2.3.3.1Preoperational Program2.3-92.3.3.2Operational Meteorological Program2.3-122.3.3.3Onsite Data Summaries of Parameters for Dispersion Meteorology2.3-132.3.4Short-Term (Accident) Diffusion Estimates2.3-142.3.4.1Objective2.3-142.3.4.2Calculation Results2.3-17 2.3.5Long-Term (Routine) Diffusion Estimates2.3-18005_TVA_WB_FSAR_Section_2_B.pdf2.4HYDROLOGIC ENGINEERING2.4-12.4.1Hydrological Description2.4-12.4.1.1Sites and Facilities2.4-12.4.1.2Hydrosphere2.4-2 2.4.2Floods2.4-62.4.2.1Flood History2.4-62.4.2.2Flood Design Considerations2.4-7 2.4.2.3Effects of Local Intense Precipitation2.4-92.4.3Probable Maximum Flood (PMF) on Streams and Rivers2.4-122.4.3.1Probable Maximum Precipitation (PMP)2.4-13 2.4.3.2Precipitation Losses2.4-142.4.3.3Runoff and Stream Course Model2.4-142.4.3.4Probable Maximum Flood Flow2.4-18 2.4.3.5Water Level Determinations2.4-252.4.3.6Coincident Wind Wave Activity2.4-262.4.4Potential Dam Failures, Seismically Induced2.4-28 2.4.4.1Dam Failure Permutations2.4-282.4.4.2Unsteady Flow Analysis of Potential Dam Failures2.4-402.4.4.3Water Level at Plantsite2.4-40 2.4.5Probable Maximum Surge and Seiche Flooding2.4-402.4.6Probable Maximum Tsunami Flooding2.4-402.4.7Ice Effects2.4-41 2.4.8Cooling Water Canals and Reservoirs2.4-422.4.9Channel Diversions2.4-422.4.10Flooding Protection Requirements2.4-42 2.4.11Low Water Considerations2.4-442.4.11.1 Low Flow in Rivers and Streams2.4-442.4.11.2Low Water Resulting From Surges, Seiches, or Tsunami2.4-442.4.11.3Historical Low Water2.4-442.4.11.4Future Control2.4-452.4.11.5Plant Requirements2.4-452.4.12Dispersion, Dilution, and Travel Times of Accidental Releases of Liquid Effluents 2.4-46 2.4.12.1Radioactive Liquid Wastes2.4-462.4.12.2Accidental Slug Releases to Surface Water 2.4-462.4.12.3Effects on Ground Water2.4-48 Table of Contents2-iiiWATTS BARWBNP-76TABLE OF CONTENTS SectionTitle Page2.4.13Groundwater2.4-492.4.13.1Description and On-Site Use2.4-492.4.13.2 Sources2.4-502.4.13.3Accident Effects2.4-512.4.13.4Monitoring and Safeguard Requirements2.4-522.4.13.5Design Basis for Subsurface Hydrostatic Loading2.4-522.4.14 Flooding Protection Requirements2.4-522.4.14.1Introduction2.4-532.4.14.2Plant Operation During Floods Above Grade2.4-54 2.4.14.3Warning Scheme2.4-562.4.14.4Preparation for Flood Mode2.4-562.4.14.5Equipment2.4-58 2.4.14.6Supplies2.4-592.4.14.7Plant Recovery2.4-592.4.14.8Warning Plan2.4-59 2.4.14.9Basis For Flood Protection Plan In Rainfall Floods2.4-602.4.14.10Basis for Flood Protection Plan in Seismic-Caused Dam Failures2.4-662.4.14.11Special Condition Allowance2.4-682.5GEOLOGY, SEISMOLOGY, AND GEOTECHNICAL ENGINEERING

SUMMARY

OF FOUNDATION CONDITIONS2.5-1 2.5.1Basic Geology and Seismic Information2.5-22.5.1.1Regional Geology2.5-32.5.1.2Site Geology2.5-27 2.5.2Vibratory Ground Motion2.5-342.5.2.1Seismicity2.5-342.5.2.2Geologic Structures and Tectonic Activity2.5-42 2.5.2.3Correlation of Earthquake Activity With Geologic Structures to Tectonic Prov-inces 2.5-422.5.2.4Maximum Earthquake Potential2.5-43 2.5.2.5Seismic Wave Transmission Characteristics of the Site2.5-452.5.2.6Safe Shutdown Earthquake2.5-452.5.2.7Operating Basis Earthquake2.5-452.5.3Surface Faulting2.5-452.5.3.1Geologic Conditions of the Site2.5-452.5.3.2Evidence of Fault Offset2.5-45 2.5.3.3Earthquakes Associated With Capable Faults2.5-542.5.3.4Investigations of Capable Faults2.5-542.5.3.5Correlation of Epicenters With Capable Faults2.5-562.5.3.6Description of Capable Faults2.5-562.5.3.7Zone Requiring Detailed Faulting Investigation2.5-562.5.3.8Results of Faulting Investigations2.5-562.5.4Stability of Subsurface Materials2.5-572.5.4.1Geologic Features2.5-57 2-ivTable of ContentsWATTS BARWBNP-76TABLE OF CONTENTS SectionTitle Page2.5.4.2Properties of Subsurface Materials2.5-572.5.4.3Exploration2.5-902.5.4.4Geophysical Surveys2.5-902.5.4.5Excavations and Backfill2.5-932.5.4.6Groundwater Conditions2.5-1012.5.4.7Response of Soil and Rock to Dynamic Loading2.5-103 2.5.4.8Liquefaction Potential2.5-1032.5.4.9Earthquake Design Basis2.5-1142.5.4.10Static Analysis2.5-114 2.5.4.11Safety-Related Criteria for Foundations2.5-1152.5.4.12Techniques to Improve Subsurface Conditions2.5-1162.5.4.13Construction Notes2.5-118 2.5.5Stability of Slopes2.5-1192.5.5.1Slope Characteristics2.5-1192.5.5.2Design Criteria and Analysis2.5-120 2.5.5.3Logs of Borings2.5-1282.5.5.4Compaction Specifications2.5-1282.5.6Embankments2.5-12 List of Tables 2-vWATTS BARWBNP-76LIST OF TABLES SectionTitleTable 2.1-1Watts Bar 1986 Peak Hours Recreation Visitation Within 10 Miles of the SiteTable 2.1-1aWatts Bar 1990 Estimated Peak Hour Recreation Visitation Within 10 Miles Of The SiteTable 2.1-1bWatts Bar 2000 Estimated Peak Hour Recreation Visitation Within 10 Miles Of The SiteTable 2.1-1cWatts Bar 2010 Estimated Peak Hour Recreation Visitation Within 10 Miles Of The SiteTable 2.1-1dWatts Bar 2020 Estimated Peak Hour Recreation Visitation Within 10 Miles Of The SiteTable 2.1-1eWatts Bar 2030 Estimated Peak Hour Recreation Visitation Within 10 Miles Of The SiteTable 2.1-1fWatts Bar 2040 Estimated Peak Hour Recreation Visitation Within 10 Miles Of The SiteTable 2.1-1gSchool Enrollments In Area Of Watts Bar Nuclear PlantTable 2.1-2Watts Bar 1970 Population Distribution Within 10 Miles of The SiteTable 2.1-3Watts Bar 1978 Population Distribution Within 10 Miles of The SiteTable 2.1-4Watts Bar 1980 Population Distribution Within 10 Miles of The SiteTable 2.1-4aWatts Bar 1986 Population Distribution Within 10 Miles of The SiteTable 2.1-5Watts Bar 1990 Population Distribution Within 10 Miles of The SiteTable 2.1-6Watts Bar 2000 Population Distribution Within 10 Miles of The SiteTable 2.1-7Watts Bar 2010 Population Distribution Within 10 Miles of The Site 2-viList of TablesWATTS BARWBNP-76LIST OF TABLES SectionTitleTable 2.1-8Watts Bar 2020 Population Distribution Within 10 Miles of The SiteTable 2.1-8aWatts Bar 2030 Population Distribution Within 10 Miles of The SiteTable 2.1-8bWatts Bar 2040 Population Distribution Within 10 Miles of The SiteTable 2.1-9Watts Bar 1970 Population Distribution Within 50 Miles of The SiteTable 2.1-10Watts Bar 1978 Population Distribution Within 50 Miles of The SiteTable 2.1-11Watts Bar 1980 Population Distribution Within 50 Miles of The SiteTable 2.1-11aWatts Bar 1986 Population Distribution Within 50 Miles of The SiteTable 2.1-12Watts Bar 1990 Population Distribution Within 50 Miles of The SiteTable 2.1-13Watts Bar 2000 Population Distribution Within 50 Miles of The SiteTable 2.1-14Watts Bar 2010 Population Distribution Within 50 Miles of The SiteTable 2.1-15Watts Bar 2020 Population Distribution Within 50 Miles of The SiteTable 2.1-15aWatts Bar 2030 Population Distribution Within 50 Miles of The SiteTable 2.1-15bWatts Bar 2040 Population Distribution Within 50 Miles of The SiteTable 2.1-16Deleted by Amendment 83Table 2.1-17Deleted by Amendment 83 Table 2.2-1Waterborne Hazardous Material Traffic (Tons)Table 2.2-2Waterborne Ha zardous Material Traffic Survey ResultsTable 2.3-1Thunderstorm Day Frequencies List of Tables2-viiWATTS BARWBNP-76LIST OF TABLES SectionTitleTable 2.3-2Temperature Data (°F)

Decatur, Tennesee*Table 2.3-3Temperature Data (°F)

Chattanooga, Tennessee*Table 2.3-4Watts Bar Dam Precipitation Data (Inches)*Table 2.3-5Snowfall Data (Inches)

Decatur, TennesseeTable 2.3-6Snowfall Data (Inches)

Chattanooga and Knoxville, Tennesseea,bTable 2.3-7Average Relative Humidity Data (Percent) - Selected Hours Chattanooga, Tennessee*Table 2.3-8Relative Humidity (Percent)

National Weather Service Station Chattanooga, Tennessee*Table 2.3-9Absolute Humidity (gm/m3)

National Weather Service Station Chattanooga, Tennessee*Table 2.3-10Relative Humidity (Percent)

Watts Bar Nuclear Plant Meteorological Facility*Table 2.3-11Absolute Humidity (Gm/m3)*

Watts Bar Nuclear Plant Meteorological Facility**Table 2.3-12Fog Data*Table 2.3-13Joint Percentage Frequencies of Wind Speed By Wind Direction Disre-garding Stability Class, Watts Bar Nuclear PlantTable 2.3-14Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-15Wind Direction Persistence Data Disregarding Stability, Watts Bar Nuclear PlantTable 2.3-16Wind Direction Persistence Data Disregarding Stability, Watts Bar Nuclear PlantTable 2.3-17Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-18Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-19Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-20Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, 2-viiiList of TablesWATTS BARWBNP-76LIST OF TABLES SectionTitle Watts Bar Nuclear PlantTable 2.3-21Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-22Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-23Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-24Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-25Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-26Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-27Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-28Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-29Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-30Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-31Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-32Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-33Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-34Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-35Joint Percentage Frequencies Of Wind Speed List of Tables2-ixWATTS BARWBNP-76LIST OF TABLES SectionTitle By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-36Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-37 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-38 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-39Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-40Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantTable 2.3-41Percent Occu rrence Of Wind Speed*

For All Wind DirectionsTable 2.3-42Percent Occurren ces Of Inversion Conditions And Pasquill Stability Classes A-G*

Watts Bar Nuclear PlantTable 2.3-43Deleted By Amendment 63Table 2.3-44 Inversi on Persistence Data Watts Bar Nuclear PlantTable 2.3-45Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class A (D elta T<=-1.9 C/100 M), Watts Bar Nuclear PlantTable 2.3-46Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class B (-1.9< Delta T<=-1.7 C/100 M),

Watts Bar Nuclear PlantTable 2.3-47 Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class C (-1.7< Delta T<=-1.5 C/100 M),

Watts Bar Nuclear PlantTable 2.3-48Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class D (-1.5< Delta T<=-0.5 C/100 M),

Watts Bar Nuclear PlantTable 2.3-49Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class E (-0.5< Delta T<= 1.5 C/100 M), Watts Bar Nuclear PlantTable 2.3-50Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class F ( 1.5< Delta T<= 4.0 C/100 M), Watts Bar Nuclear PlantTable 2.3-51Joint Percentage Frequencies Of Wind Speed By Wind Direction For 2-xList of TablesWATTS BARWBNP-76LIST OF TABLES SectionTitle Stability Class G (Delta T > 4.0 C/100 M), Watts Bar Nuclear PlantTable 2.3-52Joint Percentage Frequencie s Of Wind Speed By Stability Class, Watts Bar Nuclear PlantTable 2.3-53 Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class A (D elta T<=-1.9 C/100 M), Watts Bar Nuclear PlantTable 2.3-54Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class B (-1.9< Delta T<

=-1.7 C/100 M), Watts Bar Nuclear PlantTable 2.3-55Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class C (-1.7< Delta T<

=-1.5 C/100 M), Watts Bar Nuclear PlantTable 2.3-56Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class D (-1.5< Delta T<

=-0.5 C/100 M), Watts Bar Nuclear PlantTable 2.3-57Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class E (-0.5< Delta T<

= 1.5 C/100 M), Watts Bar Nuclear PlantTable 2.3-58Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class F (1.5< Delta T

<= 4.0 C/100 M), Watts Bar Nuclear PlantTable 2.3-59Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class G (Delta T > 4.0 C/100 M) Watts, Bar Nuclear PlantTable 2.3-60Joint Percentage Frequencies Of Wind Speed By Stability Class, Watts Bar Nuclear PlantTable 2.3-61Calculated 1-hour Average At mospheric Dispersion Factors (X/q) At Minimum Distance (1100 Meters) Between Release Zone (100 M Radi-us) And Exclusion Area Boundary (1200 M Radius) For Watts Bar Nu-clear PlantTable 2.3-61aCalculated 1-hour Average At mospheric Dispersion Factors (X/q) At Minimum Distance (1100 Meters)

Between Release Zone (100 M Ra-dius) And Exclusion Area Boundary (1200 M Radius) For Watts Bar

Nuclear PlantTable 2.3-62Calculated 1-hour Average A nd Annual Average Atmospheric Disper-sion Factors (X/q) At Low Population Zone Distance (4828 Meters) For Watts Bar Nuclear PlantTable 2.3-62aCalculated 1-hour Average A nd Annual Average Atmospheric Disper-sion Factors (X/q) At Low Population Zone Distance (4828 Meters) For Watts Bar Nuclear PlantTable 2.3-63Values Of 5th Percentile Overall Site 8-hour, 16-hour, 3-day, And 26-day Atmospheric Dispersion Factors (X/q) At Low Population Zone Distance (4828 Meters) For Watts Bar Nuclear PlantTable 2.3-63aVALUES OF 5TH PERCENTILE OVERALL SITE 8-HOUR, List of Tables2-xiWATTS BARWBNP-76LIST OF TABLES SectionTitle16-HOUR, 3-DAY, AND 26-DAY ATMOSPHERIC DISPERSION FACTORS (X/Q) AT LOW POPULATION ZONE DISTANCE (4828 METERS) FOR WATTS BAR NUCLEAR PLANTTable 2.3-640.5th Percentile Sector Values Of 8-hour, 16-hour, 3-day, And 26-day Atmospheric Dispersion Factors (X/q) At Low Population Zone Outer Boundary Distance (4828 Meters) For Watts Bar Nuclear PlantTable 2.3-64a0.5th Percentile Sector Values Of 8-hour, 16-hour, 3-day, And 26-day Atmospheric Dispersion Factors (X/q) At Low Population Zone Outer Boundary Distance (4828 Meters) For Watts Bar Nuclear PlantTable 2.3-65Deleted By Amendment 63Table 2.3-66Atmospheric Dispersion Factors (X/q), Sec/m3, For Design Basis Acci-dent Analyses Based On Onsite Meteorological Data For Watts Bar Nu-clear PlantaTable 2.3-66aAtmospheric Dispersion Factors (X/q), Sec/m3, For Design Basis Acci-dent Analyses Based On Onsite Meteorological Data For Watts Bar Nu-clear Plant1Table 2.3-67Dispersion Meteor ology - Onsite 10-meter Wind Data - 5th Percentile Values Of Inverse Wind Speed (1/u) Distributions For Post-loca Control Bay Dose Calculations For Watts Bar Nuclear PlantTable 2.3-67aDispersion Meteor ology - Onsite 10-meter Wind Data - 5th Percentile Values Of Inverse Wind Speed (1/u) Distributions For Post-loca Control Bay Dose Calculations For Watts Bar Nuclear PlantTable 2.4-1Facts About Major TVA Dams and ReservoirsTable 2.4-2Facts About Non-TVA Dam and Reservoir ProjectsTable 2.4-3Flood Detention Capacity TVA Projects Above Watts Bar Nuclear PlantTable 2.4-4Location of Surface Water Supplies in the 58.9 Mile Reach of the Main-stream of the Tennessee River Between Watts Bar Dam (Trm 529.9) and Chichamagua Dam (Trm 271.0)Table 2.4-5Probable Maximum Storm Ra infall and Precipitation ExcessTable 2.4-6Unit Hydrograph Data Table 2.4-7Flood Flow And Elevation SummaryTable 2.4-8Floods From Postulated Seismic Failure of Upstream DamsTable 2.4-9Sheets 1 and 2 Deleted By Amendment 63 Table 2.4-10Well and Spring Inventory Within 2-mile Radius of Watts Bar Nuclear Plant SiteTable 2.4-11Deleted by Amendment 83 Table 2.4-12Weir Length Desc ription And Coefficients of Discharge For Areas 3 and 4Table 2.4-13Drainage Area Peak DischargeTable 2.4-14Dam Safety Modi fication Status (Hydrologic)Table 2.5-1Soil Strength Tests Table 2.5-2Watts Bar Nuclear Plant Soil Investigation 500-kv Transformer Yard Summary Of Laboratory Test DataTable 2.5-3WATTS BAR NUCLEAR PLAN T SOIL INVESTIGATION 500-KV 2-xiiList of TablesWATTS BARWBNP-76LIST OF TABLES SectionTitle TRANSFORMER YARD

SUMMARY

OF LABORATORY TEST DATATable 2.5-4WATTS BAR NUCLEAR PLANT SOIL INVEST IGATION NORTH COOLING TOWER

SUMMARY

OF LABORATORY TEST DATATable 2.5-5WATTS BAR NUCLEAR PL ANT SOIL INVESTIGATION SOUTH COOLING TOWER

SUMMARY

OF LABORATORY TEST DATATable 2.5-6Watts Bar Nuclear Plant Soil Investigation Diesel Generator Building Summary of Laboratory Test DataTable 2.5-7Watts Bar Nuclear Plant Soil Investigation Essential Raw Cooling Water Supply Summary of Laboratory Test DataTable 2.5-8Watts Bar Nuclear Plant Intake Channel Soil Investigation

Summary of Laboratory Test DataTable 2.5-9Watts Bar Nuclear Plant Intake Channel

Soil Investigation Summary of Laboratory Test DataTable 2.5-10Watts Ba r Nuclear Plant Class Ie Conduits Soil Investigation Summary Of Laboratory Test DataTable 2.5-11Watts Ba r Nuclear Plant Class Ie Conduits Soil Investigation

Summary of Laboratory Test DataTable 2.5-12Soil Design ValuesTable 2.5-13Surface Settlements (S) a nd Average Deformation Moduli (E) for Center of Flexible Circular Footings Loaded With 5 KsfTable 2.5-14Effect of Removing Top 10 Feet of Rock on Settlement of 10-foot Diameter Flexible FootingTable 2.5-15Average In Situ Down-hole Soil Dynamics Diesel Generator BuildingTable 2.5-16Average Seismic Refraction Soil Dynamics Diesel Generator BuildingTable 2.5-17In-Situ Soil Dynamic Prope rties Watts Bar Nuclear Power Plant Class Ie Conduits and Ercw PipingTable 2.5-17ADynamic Soil Properti es - Diesel Generator BuildingTable 2.5-17BDynamic Soil Properties -

Additional Diesel Generator BuildingTable 2.5-17CDynamic Soil Properties - Refueling Water Storage TanksTable 2.5-17DDynamic Soil Proper ties - North Steam Valve RoomTable 2.5-18Watts Ba r Nuclear Plant List of Tables2-xiiiWATTS BARWBNP-76LIST OF TABLES SectionTitle Borrow Investigation Summary of Laboratory Test DataTable 2.5-19Watts Ba r Nuclear Plant Additional Borrow Areas Summary of Laboratory Test DataTable 2.5-19aSoil Properties, Borrow Area 7 Table 2.5-20Grout UsageTable 2.5-21Watts Bar Nuclear Plant Intake Channel Summary of Laboratory Test Data Remolded Channel Area SoilsTable 2.5-22TVA Soil Testing Laboratory Summary of Test Results Watts Bar Liquefaction StudyTable 2.5-23Waterways Experiment Station, Corps of EngineersTable 2.5-24Watts Ba r Nuclear Plant Ercw and Hpfp Systems Soil Investigation

Summary of Laboratory Test DataTable 2.5-25Watts Ba r Nuclear Plant Summary Of Laboratory Test Data

Borrow Soil ClassesTable 2.5-26Watts Ba r Nuclear Plant Intake Channel

Sand Material Summary of Cyclic Loading Test DataTable 2.5-27Watts Ba r Nuclear Plant Intake ChannelClay Material Summary of Static Test DataTable 2.5-28Drill rod lengths and we ights versus spt sample depths Applying to 1976 and 1979 reportsTable 2.5-29Watts Ba r Nuclear Plant ERCW Conduit 1976 ReportTable 2.5-30Watts Ba r Nuclear Plant ERCW Conduit 1976 ReportTable 2.5-31Recommended Procedures and Guidelines for Standard Penetration TestingTable 2.5-32Drill Rod Lengths and Weights Versus SPT 1981 ReportTable 2.5-33Watts Ba r Nuclear Plant ERCW Conduit

1981 ReportTable 2.5-34Watts Ba r Nuclear Plant Essential Raw Cooling Water Piping System 2-xivList of TablesWATTS BARWBNP-76LIST OF TABLES SectionTitle Liquefaction Investigation Summary Of Laboratory Test DataTable 2.5-35Laboratory Procedure For Pe rforming Cyclic Triaxial R TestsTable 2.5-36Results of Stress-Controlled Cyclic Triaxial Tests on Ercw Route SoilsTable 2.5-37Summary Of Classification DataTable 2.5-38Summary of Classification Data Table 2.5-39Summary of Classification DataTable 2.5-40Summary of Classification DataTable 2.5-41Comparison of Classification and Density Data of Test Pit and U ndistributed Boring SamplesTable 2.5-42Watts Ba r Nuclear Plant Soil-Supported Structures

Representative Basal Gravel Samples Summary of Laboratory Test DataTable 2.5-43Watts Ba r Nuclear Plant Soil-Support Structures Undistributed Sampling Summary of Laboratory Test DataTable 2.5-44WBNP - Bearing Capacity - Category I Soil-Supported Structures Adopted Soil Properties For Bear ing Capacity DeterminationTable 2.5-45Watts Ba r Nuclear Plant ERCW Liquefaction Trench A Summary of Laboratory Test Data

Borrow Soil ClassesTable 2.5-45aWatts Bar Nucl ear Plant ERCW Liquefac tion, Trench A Supplemen-tal Borrow

Summary of Laboratory Test Data Borrow Soil ClassesTable 2.5-46Watts Ba r Nuclear Plant ERCW Liquefaction

Trench B Summary of Laboratory Test Data Borrow Soil ClassesTable 2.5-47Watts Ba r Nuclear Plant ERCW Liquefaction Borrow Area 9

Summary of Laboratory Test Data Borrow Soil ClassesTable 2.5-48Watts Ba r Nuclear Plant ERCW Liquefaction Borrow Area 10

Summary of Laboratory Test Data Borrow Soil ClassesTable 2.5-49Watts Ba r Nuclear Plant List of Tables2-xvWATTS BARWBNP-76LIST OF TABLES SectionTitle ERCW Liquefaction Borrow Area 11 Summary of Laboratory Test Data Borrow Soil ClassesTable 2.5-50Watts Ba r Nuclear Plant ERCW Liquefaction

Borrow Area 12 Summary of Laboratory Test Data Borrow Soil ClassesTable 2.5-51Watts Ba r Nuclear Plant ERCW Liquefaction Borrow Area 13

Summary of Laboratory Test Data Borrow Soil ClassesTable 2.5-52Watts Ba r Nuclear Plant ERCW Liquefaction Borrow Area 2c Summary of Laboratory Test Data

Borrow Soil ClassesTable 2.5-53Watts Ba r Nuclear Plant ERCW Liquefaction

Borrow Area 2c Extension Summary of Laboratory Test Data Borrow Soil GroupsTable 2.5-54Summary of Laboratory Test DataTable 2.5-55Granular Material Design Values Section 1032 MaterialTable 2.5-56Watts Ba r Nuclear Plant Relative Density Test Results on EngineeredGranular Fill Beneath the Diesel Generator BuildingTable 2.5-57Watts Ba r Nuclear Plant Sieve Analysis of 1032 Gravel Tennessee Valley AuthorityTable 2.5-58Watts Ba r Nuclear Plant ERCW - Piezometers Water Level ReadingsTable 2.5-59ERCW Route Liquefaction EvaluationMaximum and Average Element Stresses and Peak Accleration at the Top of Each LayerTable 2.5-60Factors of Safety with Depth When the Water Table is not ConsideredTable 2.5-61Factors of Safety with Depth Assuming the Water Table is 16.5 feet Below Ground SurfaceTable 2.5-62

SUMMARY

OF SPT SAMPLES OF SILTY SANDS (SM) BELOW ERCW PIPELINES HAVING FACTOR OF SAFETY 2-xviList of TablesWATTS BARWBNP-76LIST OF TABLES SectionTitle LESS THAN UNITY FOR 0.4 G PEAK GROUND SURFACE AC-CELERATIONTable 2.5-63

SUMMARY

OF SPT SAMPLES OF SILTS (ML) BELOW ERCW PIPELINES HAVING FACTOR OF SAFETY LESS THAN UNITY FOR 0.4 G PEAK GROUND SURFACE ACCELERATIONTable 2.5-64

SUMMARY

OF SPT SAMPLES OF SILTY SANDS (SM) BELOW ELECTRICAL CONDUITS HAVING FACTOR OF SAFETY LESS THAN UNITY FOR 0.4 G PEAK GROUND SURFACE ACCELERA-TIONTable 2.5-65Strain Criteria for Determini ng Potential Settlement Of Soils Subject to Earthquake With Peak Top-Of-Ground Acceleration of 0.40g At Watts Bar Nuclear PlantTable 2.5-66Soil Bearing Capa cities and Factors of Safety for Soil-Supported Cate-gory I Structures List of Figures2-xviiWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.1-1Location of Wa tts Bar Nuclear Plant SiteFigure 2.1-2Watts Bar Si te Location 0-50 MilesFigure 2.1-3Watts Bar Si te Location 0-10 MilesFigure 2.1-4aWatts Bar Topogra phic Map & Reservation BoundaryFigure 2.1-4bSite Boundary / Exclusion Area BoundaryFigure 2.1-5Main Plant General Plan Figure 2.1-6Deleted by Amendment 63Figure 2.1-7Deleted by Amendment 63Figure 2.1-8Deleted by Amendment 63 Figure 2.1-9Deleted by Amendment 63Figure 2.1-10Deleted by Amendment 63Figure 2.1-11Deleted by Amendment 63 Figure 2.1-12Deleted by Amendment 63Figure 2.1-13Deleted by Amendment 63Figure 2.1-14Deleted by Amendment 63 Figure 2.1-15Deleted by Amendment 63Figure 2.1-16Deleted by Amendment 63Figure 2.1-17Deleted by Amendment 63 Figure 2.1-18Deleted by Amendment 63Figure 2.1-19Deleted by Amendment 63Figure 2.1-201994 Cumulative Population Within 30 Miles Of The Site Figure 2.1-212034 Cumulative Populat ion Within 30 Miles of the SiteFigure 2.2-1Airways in the Area of the PlantFigure 2.2-2Military Airways in the Area of the PlantFigure 2.3-1Normal Sea Level Pressure Di stribution Over North America and The North Atlantic OceanFigure 2.3-2Total Number of Forecast-D ays of High Meteorological Potential For Air Pollution in a 5 Year PeriodFigure 2.3-3Climatological Data S ources in Area Around Watts Bar SiteFigure 2.3-4Wind Speed at 9.72 Meters All Stability classes, Watts Bar Nuclear Plant, January 1, 1974 -December 31, 1993Figure 2.3-5Wind Speed at 46.36 Meters All Stability Classes, Watts Bar Nuclear Plant, January 1, 1977 -December 31, 1993Figure 2.3-6aPercent Occurrence s Of Pasquill Stability Cl asses A, B, C, And D By Time Of Day, Watts Bar Nuclear Plant, 1974-1993Figure 2.3-6bPercent Occurrences Of Pasquill Stability Classes E, F, and G By Time of Day, Watts Bar Nuclear Plant, 1974-1993Figure 2.3-7Wind Speed at 9.72 Meters for Stability Class A, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993Figure 2.3-8Wind Speed at 9.72 Meters for Stability Class B, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993Figure 2.3-9Wind Speed at 9.72 Meters for Stability Class C, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993Figure 2.3-10Wind Speed at 9.72 Meters for Stability Class D, Watts Bar Nuclear 2-xviiiList of FiguresWATTS BARWBNP-91 LIST OF FIGURES SectionTitle Plant, January 1, 1974 - December 31, 1993Figure 2.3-11Wind Speed at 9.72 Meters for Stability Class E, Watts Bar Nuclear Plant, January 1, 1974 -December 31, 1993Figure 2.3-12Wind Speed at 9.72 Meters for Stability Class F, Watts Bar Nuclear Plant, January 1, 1974 -December 31, 1993Figure 2.3-13Wind Speed at 9.72 Meters for Stability Class G, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993Figure 2.3-14Topography Within 10 Mile Radius - NFigure 2.3-15Topography Within 10 Mile Radius - NNE Figure 2.3-16Topography Within 10 Mile Radius - NEFigure 2.3-17Topography Within 10 Mile Radius - ENEFigure 2.3-18Topography Within 10 Mile Radius - E Figure 2.3-19Topography Within 10 Mile Radius - ESEFigure 2.3-20Topography Within 10 Mile Radius - SEFigure 2.3-21Topography Within 10 Mile Radius - SSE Figure 2.3-22Topography Within 10 Mile Radius - SFigure 2.3-23Topography Within 10 Mile Radius - SSWFigure 2.3-24Topography Within 10 Mile Radius - SW Figure 2.3-25Topography Within 10 Mile Radius - WSWFigure 2.3-26Topography Within 10 Mile Radius - WFigure 2.3-27Topography Within 10 Mile Radius - WNW Figure 2.3-28Topography Within 10 Mile Radius - NWFigure 2.3-29Topography Within 10 Mile RadiusFigure 2.4-1Tennessee River Basin Mean Annual Precipitation 35-Year Period 1935-1969Figure 2.4-2General Plan Elevation

& Sections Watts Bar Hydro ProjectFigure 2.4-3General Plan Elevati ons & Sections Fort Loudon ProjectFigure 2.4-3aGeneral Plan Elevati ons and Sections Fort Loudon ProjectFigure 2.4-4Norris Dam Plan-Elevations and SectionsFigure 2.4-5General Plan Elevations

& Sections - Melton Hill ProjectFigure 2.4-6General Plan Elevati on And Sections - Fontana ProjectFigure 2.4-7General Plan Elevation & Sections - Douglas ProjectFigure 2.4-8General Plan Elevati ons & Sections - Cherokee ProjectFigure 2.4-9General Plan Elevation & Se ctions - Fort Patrick Henry ProjectFigure 2.4-10General Plan Elevat ions & Sections - Boone ProjectFigure 2.4-11General Plan Elevations

&. Sections - Watauga ProjectFigure 2.4-12General Plan Elevation

& Sections - South Holston ProjectFigure 2.4-13General Plan Elevat ion & Sections - Tellico ProjectFigure 2.4-14General Plan Elevation

&. Sections - Chickamauga ProjectFigure 2.4-15Multiple-Purpose - Rese rvoir Operations Watts Bar ProjectFigure 2.4-16Multiple-Purpose - Reser voir Operations - Fort Loudoun ProjectFigure 2.4-17Multiple-Purpose - Rese rvoir Operations Norris ProjectFigure 2.4-18Multiple-Purpose - Reser voir Operations - Fontana ProjectFigure 2.4-19Multiple-Purpose - Rese rvoir Operations - Douglas Project List of Figures2-xixWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.4-20Multiple-Purpose - Reser voir Operations - Cherokee ProjectFigure 2.4-21Multiple-Purpose - Rese rvoir Operations - Boone ProjectFigure 2.4-22Multiple-Purpose - Rese rvoir Operations - Watauga ProjectFigure 2.4-23Multiple-Purpose - Reservoi r Operations - South Holston ProjectFigure 2.4-24Multiple-Purpose - Rese rvoir Operations - Tellico ProjectFigure 2.4-25Tennessee River-Mile 529.9 -

Reservoir Areas And Volumes - Watts Bar ProjectFigure 2.4-26Multiple-Purpose -Reservoi r Operations - Chickamauga ProjectFigure 2.4-27Tennessee River Mile 602.3 -Reservoir Areas And Volumes - Fort Lou-doun ProjectFigure 2.4-28Clinch River Mile 79.8 -Reservoir Areas And Volumes - Norris ProjectFigure 2.4-29Clinch River Mile 23.1 - Rese rvoir Areas and Volumes - Melton Hill ProjectFigure 2.4-30Little Tennessee River Mile 61.0 - Reservoi r Areas and Volumes - Fon-tana ProjectFigure 2.4-31French Broad River Mile 32.3 - Reservoir Areas And Volumes - Doug-las ProjectFigure 2.4-32Holston River Mile 52.3 - Re servoir Areas And Volumes - Cherokee ProjectFigure 2.4-33S.F. Holston River Mile 8.2 -

Reservoir Areas and Volumes - Fort Pat-rick Henry ProjectFigure 2.4-34South Fork Holston River Mi le 18.6 - Reservoir Areas and Volumes -

Boone ProjectFigure 2.4-35Watauga River Mile 36.7 - Re servoir Areas And Volumes - Watauga ProjectFigure 2.4-36S.F. Holston River Mile 49.8 - Reservoir Areas And Volumes - South Holston ProjectFigure 2.4-37Little Tennessee River Mile 0.3 - Reservoir Areas And Volumes - Tel-lico ProjectFigure 2.4-38Tennessee River Mile 471.0 - Re servoir Areas And Volumes - Chicka-mauga ProjectFigure 2.4-39Deleted by Amendment 63Figure 2.4-40Tennessee River Mile 464.2 -

Distribution Of Floods At Chattanooga, TennesseeFigure 2.4-40aMain Plant Site Grading And Drainage System For Flood Studies Sheet 1Figure 2.4-40aMain Plant Site Grading and Drainage System For Flood Studies Sheet 2Figure 2.4-40aMain Plant Site Grading and Drainage System For Flood Studies Sheet 3Figure 2.4-40bMain Plant General Plan Figure 2.4-40cYard Site Grading a nd Drainage System For Flood StudiesFigure 2.4-40d-1Main Plant Plant Perimeter Roads Plan and Profile Sheet 1Figure 2.4-40dMain Plant Plant Perimete r Roads Plan and Profile - Sheet 2 2-xxList of FiguresWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.4-40dMain Plant Plant Perimete r Roads Plan and Profile - Sheet 3Figure 2.4-40eAccess Highway TVA DWG 1001H202 R4 - Sheet 1Figure 2.4-40eAccess Highway TVA DWG. 1001H201 R4 - Sheet 2Figure 2.4-40fMain Plant Main Plant Tracks Plan - Sheet 1Figure 2.4-40fMain Plant Main Plant Tr acks Sections & Profiles - Sheet 2Figure 2.4-40fMain Plant Main Plant Tr acks Sections & Profiles - Sheet 3Figure 2.4-40gYard, Grading Drainage and Surfacing Tr ansformer & Switchyard -

Sheet 1Figure 2.4-40gYard, Grading Drainage and Surfacing Tr ansformer & Switchyard -

Sheet 2Figure 2.4-40gYard, Grading Dr ainage and Surfacing Tran sformer & Switchyard -

Sheet 3Figure 2.4-40hProbable Maximum Precipation Point RainfallFigure 2.4-40iDeleted by Amendment 83Figure 2.4-40jDeleted by Amendment 83 Figure 2.4-40kDeleted by Amendment 83Figure 2.4-40LDeleted by Amendment 83Figure 2.4-41Probable Maximum March Is ohyets (21,400-sq. mi. downstream) 1st 6 Hours (IN.)Figure 2.4-42Probable Maximum March Isohyets (7980 Sq. Mi.) 1st 6 Hours (IN.)Figure 2.4-43Rainfall Time Distribut ion Adopted Standard Mass CurveFigure 2.4-4472-Hour March Probable Maximum Storm Depths (IN) Tennessee Riv-er Watershed Above Chickamauga DamFigure 2.4-45Hydrological Model Unit Areas Figure 2.4-466-Hour Unit H ydrographs Sheet 1 of 11Figure 2.4-466-Hour Unit H ydrographs Sheet 2 of 11Figure 2.4-466-Hour Unit H ydrographs Sheet 3 of 11Figure 2.4-466-Hour Unit H ydrographs Sheet 4 of 11Figure 2.4-466-Hour Unit H ydrographs Sheet 5 of 11Figure 2.4-466-Hour Unit H ydrographs Sheet 6 of 11Figure 2.4-462-Hour Unit H ydrographs Sheet 7 of 11Figure 2.4-462-Hour Unit H ydrographs Sheet 8 of 11Figure 2.4-466-Hour Unit H ydrographs Sheet 9 of 11Figure 2.4-466-Hour Unit H ydrographs Sheet 10 of 11Figure 2.4-466-Hour Unit H ydrographs Sheet 11 of 11Figure 2.4-47aWatts Bar Pr obable Maximum Flood Fort Loudon - Tellico OutflowFigure 2.4-47bFort Loudon Dam Rating CurveFigure 2.4-47cTellico Dam Rating CurveFigure 2.4-48General Plan Elevation & SectionsFigure 2.4-49Hydrologic Model Verification - 1973 FloodFigure 2.4-501973 Flood-Chickamauga Reservoir Unsteady Flow Model VerificationFigure 2.4-51Steady- State Model Verifi cation Watts Bar Dam Tailwater Rating CurveFigure 2.4-52Watts Bar Nuclear Plan t Probable Maximum Flood Discharge List of Figures2-xxiWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.4-53West Saddle Dike Location Plan and SectionFigure 2.4-54Watts Bar Pr obable Maximum Flood -Wat ts Bar Embankment FailureFigure 2.4-55Watts Bar Dam Rating CurvesFigure 2.4-56Watts Bar Pr obable Maximum Flood Watts Bar Dam OutflowFigure 2.4-57Watts Bar Prob able Maximum Flood Watts Bar Headwater ElevationFigure 2.4-58Watts Bar Prob able Maximum Flood Chickamauga Headwater Eleva-tionsFigure 2.4-59Chickamauga Darn Rating CurvesFigure 2.4-60Watts Bar Probable Maximum Flood Chickamauga OutflowFigure 2.4-61Watts Bar Prob able Maximum Flood Water Levels Before and After Embankment FailureFigure 2.4-62Relative Bore Height (After J. J. Stroker, REF. 31)Figure 2.4-63Assumed Limits of Em bankment Failure Wave ExpansionFigure 2.4-64Watts Bar Nuclear Plan t Probable Maximum Flood ElevationFigure 2.4-65Tennessee River - Mile 514-530 - Watts Bar Nuclear Plant Flood and Thalweg ProfileFigure 2.4-66Extreme Value Analysis 30-Minute Wind Speed From The Southwest Chattanooga, TN 1948-74Figure 2.4-67Watts Bar Nucl ear Plant Wind Wave FetchFigure 2.4-68Powerhouse & Spillway Results of Analysis For Operating Basis Earth-quake - Watts Bar DamFigure 2.4-69Embankment Results of An alysis For Operating Basis EarthquakeFigure 2.4-70Deleted by Amendment 83Figure 2.4-71Powerhouse & Spillway Results of Analysis For Operating Basis Earth-quake - Fort Loudoun DamFigure 2.4-72Embankment Results Of Anal ysis For Operating Basis Earthquake -

Fort Loudoun DarnFigure 2.4-73Nonoverflow & Spillway Resu lts of Analysis For Operating Basis Earthquake - Tellico DamFigure 2.4-74Embankment Results For Anal ysis For Operating Basis Earthquake -

Tellico DarnFigure 2.4-75Spillway & Nonoverflow Results of Analysis For OBE & 1/2 PMF-Nor-ris DamFigure 2.4-76Analysis For OBE & 1/2 PMF Assumed Condition of Dam After Failure Norris DamFigure 2.4-77Spillway & Nonoverflow Resu lts of Analysis For Operating Basis Earthquake -Cherokee DamFigure 2.4-78Embankment Results of Anal ysis For Operating Basis Earthquake -

Cherokee DamFigure 2.4-79Assumed Condition of Dam Af ter Failure PBE A nd 1/2 Probable Max Flood - Cherokee DamFigure 2.4-80Spillway & Nonoverflow Resu lts of Analysis For Operating Basis Earthquake - Douglas DamFigure 2.4-81Saddle Dam No. 1 Results of Analysis For Op erating Basis Earthquake 2-xxiiList of FiguresWATTS BARWBNP-91 LIST OF FIGURES SectionTitle- Douglas DamFigure 2.4-82Douglas Dam Assumed Conditio n of Dam After Failure aBE And 1/2 Probable Maximum Fl ood - Douglas ProjectFigure 2.4-83Fontana Dam Assumed Conditi on of Dam after Failure aBE And 1/2 Probable Maximum Flood - Fontana DamFigure 2.4-84Deleted by Amendment 63 Figure 2.4-85Deleted by Amendment 63Figure 2.4-86Spillway Results of Analys is For SSE Earthquake Fort Loudoun DamFigure 2.4-87Embankment Results of An alysis For SSE Earthquake Fort Loudoun DamFigure 2.4-88Fort Loudoun Dam Assumed Condition of Dam After Failure SSE Combined With a 25 Year Flood - Fort Loudoun DamFigure 2.4-89Tellico Dam Assumed Condition of Dam After Failure SSE Combined With a 25 Year Flood Tellico ProjectFigure 2.4-90Norris Dam SSE + 25 Year Flood Judged Condition of Dam After Fail-ure - Norris DamFigure 2.4-91SSE With Epicenter In North Knoxville VicinityFigure 2.4-92Time and Date Flood HydrographsFigure 2.4-93SSE With Epicenter In West Knoxville VicinityFigure 2.4-94Location of SSE For Simultaneous Failure of The Douglas and Fontana DamsFigure 2.4-95Tennessee River Mile 523.2 Wa tts Bar Nuclear Plant Rating CurveFigure 2.4-96Cross Sections Tennesse e River (mile 521.00) (mile 520.70) (mile 520.60)Figure 2.4-97Channel Profile Tenne ssee River (mile 520.0 to mile 521.37)Figure 2.4-98Main Plant General Grading PlanFigure 2.4-99Grading Plan Intake Channel Figure 2.4-100Deleted by Amendment 83Figure 2.4-101Deleted by Amendment 33Figure 2.4-102Wells And Spring Inventory Within 2-Mile Radius of Watts Bar Nucle-ar Plant SiteFigure 2.4-103Water-Level Fluc tuations In Observation We lls at The Watts Bar SiteFigure 2.4-104Locations of Gr ound - Water Observation WellsFigure 2.4-105Generalized Water-Table Contour Map January 1972Figure 2.4-106Mechanical - Flow Diagram Fuel Pool Cooling and Cleaning SystemFigure 2.4-107Powerhouse Units 1 & 2 Flow Diagram - Residual Heat Removal Sys-temFigure 2.4-108Schematic Flow Diagram Fl ood Protection Provisions Open Reactor Cooling (Unit 1 Shown, Unit 2 Similar)Figure 2.4-109Schematic Flow Diagram Flood Protection Pr ovisions Natural Convec-tion Cooling (Unit 1 Shown, Unit 2 Similar)Figure 2.4-110Watts Bar Nuclear Plant Rainfa ll Flood Protection Pl an Basis For Safe Shutdown For Plant FloodingFigure 2.4-111Douglas PMF Failure Wave at Watts Bar Plant List of Figures2-xxiiiWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.5-1Regional Physiographic MapFigure 2.5-2Regional Geologic MapFigure 2.5-3Subregional Geologic Setting (Please See Figures DVD For Actual Fig-ure)Figure 2.5-4Regional Tectonic MapFigure 2.5-5Regional Bouguer Gravity Anomaly Map Figure 2.5-6Regional Magnetic MapFigure 2.5-7Regional Fault MapFigure 2.5-8Subregional Fault Map Figure 2.5-9Geologic Map Of Plant Area (North Segment)Figure 2.5-10Geologic Map of Plant Area (South Segment)Figure 2.5-11Geologic Section Through Plant Area (Please See Figures DVD For Ac-tual Figure)Figure 2.5-12Core Drill Hole and Seismic Refra ction LocationsFigure 2.5-13Core Drill Layout and Summary Figure 2.5-14Graphic Log Hole 1 Sta. C-60+00Figure 2.5-15Graphic Log Hole 2 Sta. C-64+00Figure 2.5-16Graphic Log Hole 3 Sta. C-68+00 Figure 2.5-17Graphic Log Hole 4 Sta. E-60+00Figure 2.5-18Graphic Log Hole 5 Sta. E-62+00Figure 2.5-19Graphic Log Hole 6 Sta. E-64+00 Figure 2.5-20Graphic Log Hole 7 Sta. E-66+00Figure 2.5-21Graphic Log Hole 8 Sta. E-88+40Figure 2.5-22Graphic Log Hole 9 Sta. G-60+00 Figure 2.5-23Graphic Log Hole 10 Sta. G-62+00Figure 2.5-24Graphic Log Hole 11 Sta. G-64+00Figure 2.5-25Graphic Log Hole 12 Sta. G-66+00 Figure 2.5-26Graphic Log Hole 13 Sta. G-68+00Figure 2.5-27Graphic Log Hole 14 Sta. J-60+00Figure 2.5-28Graphic Log Hole 15 Sta. J-62+00 Figure 2.5-29Graphic Log Hole 16 Sta. J-64+00Figure 2.5-30Graphic Log Hole 17 Sta. J-66+00Figure 2.5-31Graphic Log Hole 18 Sta. J-82+25 Figure 2.5-32Graphic Log Hole 19 Sta. L-60+00Figure 2.5-33Graphic Log Hole 20 Sta. L-6l+00Figure 2.5-34Graphic Log Hole 21 Sta. L-62+00 Figure 2.5-35Graphic Log Hole 22 Sta. L-64+00Figure 2.5-36Graphic Log Hole 23 Sta. L-66+00Figure 2.5-37Graphic Log Hold 24 Sta. L-68+00Figure 2.5-38Graphic Log Hole M-59+00Figure 2.5-39Graphic Log Hole 26M-60+00 Figure 2.5-40Graphic Log Hole 27 Sta. M-6l+00Figure 2.5-41Graphic Log Hole 28 Sta.M-62+00Figure 2.5-42Graphic Log Hole 29 Sta. M-63+00 2-xxivList of FiguresWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.5-43Graphic Log Hole 30 Sta. M-64+00Figure 2.5-44Graphic Log Hole 31 Sta. M-65+00Figure 2.5-45Graphic Log Hole 32 Sta. M-66+00Figure 2.5-46Graphic Log Hole 33 Sta. N-59+00Figure 2.5-47Graphic Log Hole 34 Sta. N-60+00Figure 2.5-48Graphic Log Hole 35 Sta. N-6l+00 Figure 2.5-49Graphic Log Hole 36 Sta. N-62+00Figure 2.5-50Graphic Log Hole 37 Sta. N-63+00Figure 2.5-51Graphic Log Hole 38 Sta. N-64+00 Figure 2.5-52Graphic Log Hole 39 Sta. N-65+00Figure 2.5-53Graphic Log Hole 40 Sta. N-66+00Figure 2.5-54Graphic Log Hole 41 Sta. 0-60+00 Figure 2.5-55Graphic Log Hole 42 Sta. 0-61+00Figure 2.5-56Graphic Log Hole 43 Sta. 0-62+00Figure 2.5-57Graphic Log Hole 44 Sta. 0-63+00 Figure 2.5-58Graphic Log Hole 45 Sta. 0-64+00Figure 2.5-59Graphic Log Hole 46 Sta. 0-65+00Figure 2.5-60Graphic Log Hole 47 Sta. 0-66+00 Figure 2.5-61Graphic Log Hole 48 Sta. P-60+00Figure 2.5-62Graphic Log Hole 49 Sta. P-62+00 (Sheet 1 of 4)Figure 2.5-63Graphic Log Hole 50 Sta. P-63+00 Figure 2.5-64Graphic Log Hole 51 Sta. P-64+00Figure 2.5-65Graphic Log Hole 52 Sta. P-65+00Figure 2.5-66Graphic Log Hole 53 Sta. P-66+00 Figure 2.5-67Graphic Log Hole 54 Sta. P-68+00Figure 2.5-68Graphic Log Hole 55 Sta. R-62+00Figure 2.5-69Graphic Log Hole 56 Sta. R-64+00 Figure 2.5-70Special Studies Layout And SummaryFigure 2.5-71(Please see Figur es DVD for Actual Figure)Figure 2.5-723-D Elastic Properties Tabulation Sta. L-61+00 Depth 32.0 - 46.5Figure 2.5-733-D Elastic Properties Tabulation Sta. L-61+00 Depth 47.0 - 61.5Figure 2.5-743-D Elastic Properties Tabulation Sta. L-61+00 Depth 62.0 - 76.5Figure 2.5-753-D Elastic Properties Tabulation Sta. L-61+00 Depth 77.0 - 91.5Figure 2.5-763-D Elastic Properties Tabulation Sta. L-61+00 Depth 92.0 - 106.5Figure 2.5-773-D Elastic Properties Tabulation Sta. L-61+00 Depth 107.0 - 121.5Figure 2.5-783-D Elastic Properties Tabulation Sta. L-61+00 Depth 122.0 - 136.5Figure 2.5-793-D Elastic Properties Tabulation Sta. L-61+00 Depth 137.0 - 151.5Figure 2.5-803-D Elastic Properties Tabulation Sta. L-61+00 Depth 152.0 - 166.5Figure 2.5-813-D Elastic Properties Tabulation Sta. L-61+00 Depth 167.0 - 176.0Figure 2.5-82Graphic Log and Elastic Moduli Sta. M-63+00Figure 2.5-833-D Elastic Properties Tabulation Sta. M-63+00 Depth 44.0 - 58.5Figure 2.5-843-D Elastic Properties Tabulation Sta. M-63+00 Depth 59.0 - 73.5Figure 2.5-853-D Elastic Properties Tabulation Sta. M-63+00 Depth 74.0 - 88.5Figure 2.5-863-D Elastic Properties Tabulation Sta. M-63+00 Depth 89.0 - 90.0 List of Figures2-xxvWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.5-87Graphic Log and Elastic Moduli Sta. N-6l+00Figure 2.5-883-D Elastic Properties Tabulation Sta. N-61+00 Depth 35.0 - 49.5Figure 2.5-893-D Elastic Properties Tabulation Sta. N-61+00 Depth 50.0 - 64.5Figure 2.5-903-D Elastic Properties Tabulation Sta. N-61+00 Depth 65.0 - 79.5Figure 2.5-913-D Elastic Properties Tabulation Sta. N-61+00 Depth 80.0 - 92.0Figure 2.5-92Graphic Log and Elastic Modula Sta. N-62+00Figure 2.5-933-D Elastic Properties Tabulation Sta. N-62+00 Depth 45.0 - 59.5Figure 2.5-943-D Elastic Properties Tabulation Sta. N-62+00 Depth 60.0 - 70.0Figure 2.5-95Graphic Log and Elastic Moduli Sta. 0-60+00Figure 2.5-963-D Elastic Properties Tabulation Sta. 0-60+00 Depth 38.0 - 52.5Figure 2.5-973-D Elastic Properties Tabulation Sta. 0-60+00 Depth 53.0 -67.5Figure 2.5-983-D Elastic Properties Tabulation Sta. 0-60+00 Depth 68.0 - 80.0Figure 2.5-99Graphic Log and Elastic Moduli Sta. 0-61+00Figure 2.5-1003-D Elastic Properties Tabulation Sta. 0-61+00 Depth 37.0 - 51.5Figure 2.5-1013-D Elastic Properties Tabulation Sta. 0-61+00 Depth 52.0 - 66.5Figure 2.5-1023-D Elastic Properties Tabulation Sta. 0-61+00 Depth 67.0 - 81.5Figure 2.5-1033-D Elastic Properties Tabulation Sta. 0-61+00 Depth 82.0 - 92.0Figure 2.5-104Graphic Log And Elastic Moduli Sta. 0-62+00Figure 2.5-1053-D Elastic Properties Tabulation Sta. 0-62+00 Depth 43.0 - 57.5Figure 2.5-1063-D Elastic Properties Tabulation Sta. 0-62+00 Depth 58.0 - 72.5Figure 2.5-1073-D Elastic Properties Tabulation Sta. 0-62+00 Depth 73.0 - 87.5Figure 2.5-1083-D Elastic Properties Tabulation Sta. 0-62+00 Depth 88.0 - 101.0Figure 2.5-109Cross-Hole Dyna mic Sections And SummaryFigure 2.5-110Plan View Geologic Map of Reactor, Auxiliary And Control BuildingsFigure 2.5-111Plan View Geologic Map of Turbine BuildingFigure 2.5-112Geologic Section Along A+8 And A+14 Lines From T6 To T11Figure 2.5-113Geologic Section Along N Line From Cl To C13 Figure 2.5-114Section Along A4+9.5 From T+3.5 To W+12.5Figure 2.5-115Geologic Section and Panoramic Photograph Q-4 Line From A4-3 To A12+3Figure 2.5-116Geologic Sections Auxiliary And Turbine BuildingsFigure 2.5-117Geologic Sections A nd Panoramic Photographs (Unit 2)Figure 2.5-118Geologic Sections A nd Panoramic Photographs (Unit 1)Figure 2.5-119Geologic Sections and Panoramic Photographs of Reactor 2 East Perim-eter WallFigure 2.5-120Geologic Section and Panoramic Photograph of Reactor 1 West Perim-eter WallFigure 2.5-121Geologic Plan And Sect ions Intake Structure FoundationFigure 2.5-122Generalized Geologi c Section And Soil ProfileFigure 2.5-123Fault Shown Cutting Across Auxiliary Building at A4+28 Feet and East-West Reactor Centerline, Through SE Perimeter of Reactor #1, and Into Auxiliary Building West Wall Near U Line. Viewed Southwest.Figure 2.5-124Fault In Auxiliary Building Wall, Approximately 9 Feet West Of A5 and 6 Feet South of East-West Re actor Centerline. Fault Continues 2-xxviList of FiguresWATTS BARWBNP-91 LIST OF FIGURES SectionTitle Across SE Perimeter of Reac tor #1. Viewed Southwest.Figure 2.5-125Minor Thrust Fault and Associated One-Eighth Inch Clay Seam Located In East Foundation Cut at Q Line and C13+l2 Feet. Viewed East.Figure 2.5-126Closeup of Reactor #1 Norm al Fault at 72 Degrees. Viewed West.Figure 2.5-127Closeup of Fault In Reactor #1 Cavity West Wall Between Elevations of 678.5 And 690.0 Feet. Viewed West. Scale: 1 Inch = 0.56 Feet.Figure 2.5-128Fault In Auxiliary Building at All And East-West Reactor Centerline.

Fault Continues NE Through NW Pe rimeter of Reactor #2 Building.

Viewed Northeast.Figure 2.5-129Gravity or Normal Fault on Northeast Reactor #1 Perimeter at 233 De-grees. Fault Plane Dips North at 40 Degrees. Viewed West.Figure 2.5-130Fault in Reactor #2 East Wal l at Approximately 130 Degrees. Viewed East.Figure 2.5-131Fault in Reactor #2 Cavity Wall at Approximately 354 Degrees. Eleva-tion 680.0 at Base. Viewed Southwest.Figure 2.5-132Fault In South Wall of Di scharge Channel Show ing Truncation By Overlying Terrace Gravel Deposit.Figure 2.5-133Fault In North Wall of Discharge Channel Showing Truncation By Ter-race Gravel Deposit.Figure 2.5-134Fault Truncation by Terrace Grav el Deposit at 20 Feet East of A8 and 18.50 Feet North of Y. Elevation at Bench Cut is 706.35. Viewed North.Figure 2.5-135Fault in Vertical Excavation Cu t at 20 Feet East of A8 and 18.50 Feet North of Y. Viewed North.Figure 2.5-136Inset Area. Blue-Grey Clay Seam Along Fault Trace Where Truncated by Terrace Gravel Deposit. Locati on: 20 Feet East of A8 And 18.50 Feet North of Y. Viewed North.Figure 2.5-137Saprolite - Terrace Gravel Contact. Hematitic Crusts are Seen to be Dis-persed at Several Levels in the Terrace Gravel. Viewed South in the Ex-haust Cut Approximately 150 Feet East of The Powerhouse Foundation.Figure 2.5-138Site of Wood Specimen Collection for Carbon 14 Age Dating. Location is 3 Feet Above Terrace Gravel De posit. Scale: Opened Brunton Com-pass = 8.5 Inches. Location: Appr oximately 18.51 North of Y at A5 Line. Approximate Elevation 717.5.Figure 2.5-139Layout Diagram For Horizontal and Angle HolesFigure 2.5-140Plane Intersecting Disintegrated Shale PocketFigure 2.5-141Plane View Onto The 673 Elevation Figure 2.5-142Plane View Onto The 671 ElevationFigure 2.5-143Drill Layout Diagram For Ver tical Holes Viewed Onto The 671 Eleva-tionFigure 2.5-144Reactor 2 Grout LayoutFigure 2.5-145Earthquake Epicenters Figure 2.5-146Major Earthquake In United States Through 1972Figure 2.5-147Isoseismal Map Maximu m Effects 1811-1812 New Madrid EarthquakeFigure 2.5-148Isoseismal Map 1811 New Madrid Earthquake List of Figures2-xxviiWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.5-149Felt Area MapsFigure 2.5-150Isoseismal Map 1886 Charleston, S.C. EarthquakeFigure 2.5-151Felt Area Map East Tennessee Earthquake of April 17, 1913Figure 2.5-152Isoseismal Map 1916 Southern Appalachian EarthquakeFigure 2.5-153Isoseismal Map 1916 Alabama EarthquakeFigure 2.5-154Isoseismal Map 1924 Southern Appalachian EarthquakeFigure 2.5-155Felt Area Map 1940 Chattanooga EarthquakeFigure 2.5-156Isoseismal Map 1968 Southern Illinois EarthquakeFigure 2.5-157Felt Area Map East Tennessee Earthquake July 13, 1969Figure 2.5-158Isoseismal Map Elsgood, West Virginia Earthquake (November 20, 1969)Figure 2.5-159Isoseismal Map Maryvill e-Alcoa Earthquake November 30, 1973Figure 2.5-160Seismic Reflection ProfileFigure 2.5-161Index Map - All Earthquakes Latitude 32.5-38.5 North Longitude 80.5-89.0 WestFigure 2.5-162Earthquake Listing All Ea rthquakes Latitude 32.5-38.5 North Longi-tude 80.5-89.0 WestFigure 2.5-163Earthquake Listing All Ea rthquakes Latitude 32.5-38.5 North Longi-tude 80.5-89.0 WestFigure 2.5-164Earthquake Listing All Ea rthquakes Latitude 32.5-38.5 North Longi-tude 80.5-89.0 WestFigure 2.5-165Earthquake Listing All Ea rthquakes Latitude 32.5-38.5 North Longi-tude 80.5-89.0 WestFigure 2.5-166Earthquake Listing All Ea rthquakes Latitude 32.5-38.5 North Longi-tude 80.5-89.0 WestFigure 2.5-167Earthquake Listing All Ea rthquakes Latitude 32.5-38.5 North Longi-tude 80.5-89.0 WestFigure 2.5-168Earthquake Listing All Ea rthquakes Latitude 32.5-38.5 North Longi-tude 80.5-89.0 WestFigure 2.5-169Index Map -Earthquakes 4.3 Richter or Greater Latitude 32.5-38.5 North Longitude 80.5-89.0 WestFigure 2.5-170Earthquake Listing 4.3 Rich ter or Greater La titude 32.5-38.5 North Longitude 80.5-89.0 WestFigure 2.5-171Earthquake Listing 4.3 Rich ter or Greater La titude 32.5-38.5 North Longitude 80.5-89.0 WestFigure 2.5-172Earthquake Listing 4.3 Rich ter or Greater La titude 32.5-38.5 North Longitude 80.5-89.0 WestFigure 2.5-173Index Map -Earthquakes 4.3 Ri chter or Greater Latitude 30-37 North Longitude 78-92 WestFigure 2.5-174Earthquakes Listing 4.3 Richter or Greater Latitude 30-37 North Longi-tude 78-92 WestFigure 2.5-175Earthquakes Listing 4.3 Richter or Greater Latitude 30-37 North Longi-tude 78-92 WestFigure 2.5-176Earthquakes Listing 4.3 Richter or Greater Latitude 30-37 North Longi-2-xxviiiList of FiguresWATTS BARWBNP-91 LIST OF FIGURES SectionTitle tude 78-92 WestFigure 2.5-177Earthquakes Listing 4.3 Richter or Greater Latitude 30-37 North Longi-tude 78-92 WestFigure 2.5-178Earthquakes Listing 4.3 Richter or Greater Latitude 30-37 North Longi-tude 78-92 WestFigure 2.5-179Earthquakes Listing 4.3 Richter or Greater Latitude 30-37 North Longi-tude 78-92 WestFigure 2.5-180Earthquakes Listing 4.3 Richter or Greater Latitude 30-37 North Longi-tude 78-92 WestFigure 2.5-181Index Map -Earthquakes 6.3 Ri chter or Greater Latitude 30-37 North Longitude 78-92 WestFigure 2.5-182Earthquakes Listing 6.3 Richte r Or Greater Latitu de 30-37 Longitude 78-92 WestFigure 2.5-183Earthquake List ing List of ReferencesFigure 2.5-184Earthquake Listing Notes Figure 2.5-185Yard Soil Borings Location PlanFigure 2.5-185aYard Soil Borings Location PlanFigure 2.5-186Transformer Yard &

Switchyard Soil InvestigationFigure 2.5-187Cooling Towers Soil InvestigationFigure 2.5-188Pumping Statio n Foundation InvestigationFigure 2.5-189Office & Service Building Foundation Investigation Figure 2.5-190Diesel Generator Building Sections AA & BB Foundation InvestigationFigure 2.5-191Essential Cooling Wa ter Supply Soil InvestigationFigure 2.5-192Intake Channel, Se ction DD Foundation InvestigationFigure 2.5-193Intake Channel, Sect ion EE Foundation InvestigationFigure 2.5-194Intake Channel, Se ction CC Foundation InvestigationFigure 2.5-195Intake Channel, Sect ion FF Foundation InvestigationFigure 2.5-196Class IE Condui ts Soil InvestigationFigure 2.5-197Class IE Condui ts Soil InvestigationFigure 2.5-198Soil Investigation Borings For ERCW & HPFP Systems Figure 2.5-199Soil Investigation Borings For ERCW & HPFP SystemsFigure 2.5-200Soil Investigation Borings For ERCW & HPFP SystemsFigure 2.5-201Soil Investigation Borings For ERCW & HPFP Systems Figure 2.5-202Soil Investigation Borings For ERCW & HPFP SystemsFigure 2.5-203Intake Channel TrenchFigure 2.5-204Intake Channel Test 1 Figure 2.5-205Intake Channel Strength Evaluation Test 2Figure 2.5-206Class IE Conduit Alignment Q (Unconsolidated, Undrained, Undis-turbed) Samples.Figure 2.5-207ERCW Piping and IE C onduit Alignments R (Consolidated -

Undrained) Silt and Clay Samp les Natural Moisture ContentFigure 2.5-208Class IE Conduit Alignment S-Direct ShearFigure 2.5-209Type 1-Soft Shale T ype 2-Hard Shale -Type 3 LimestoneFigure 2.5-210Location of Test Holes List of Figures2-xxixWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.5-211Deformation Moduli Fr om Menard Pressuremeter TestsFigure 2.5-212Comparison of Moduli Obtain ed With Menard Pressuremeter and Birdwell 3D Sonic LoggerFigure 2.5-213Influence Factors For Determin ing Stresses Below The Center of Flex-ible Circular Footing 10, 50, 100, and 200 Ft. in DiameterFigure 2.5-214E ia For Holes Tested With Menard PressuremeterFigure 2.5-215Settlement at Ce nter of Flexible Circular Footing Loaded With SKSFFigure 2.5-216Correlation Us ed To Estimate Average Moduli For Holes Where De-tailed Calculations Were Not Made.Figure 2.5-217Distribution of Deformati on Moduli For 10 Foot Diameter FootingsFigure 2.5-218Simplified Plan of Lock foundation Showing Location of Modulus Cal-culationsFigure 2.5-219Settlement of Face of Block R-10 (Point F, fig. 16)Figure 2.5-220Yard Soil Inve stigations Borrow SoilsFigure 2.5-221Yard Soil Inve stigations Borrow SoilsFigure 2.5-221aYard Soil Inve stigations Borrow SoilsFigure 2.5-222Borrow Invest igation (Please See Figures DVD for Actual Figure)Figure 2.5-223Additional Borrow Exploration Figure 2.5-224Additional Borrow Area 4Figure 2.5-225Main Plant Excavation

& Backfill Category I StructuresFigure 2.5-226Main Plant Excavation

& Backfill Category I StructuresFigure 2.5-226aExcavation and B ackfill Category I StructuresFigure 2.5-227Typical In-Situ Soil Dyna mics Measurements Layout & SectionFigure 2.5-228Soil Dynamics Intake Channel Station 13 + 26E, 21 + l2SFigure 2.5-229Soil Dynamics Intake Channel Station 14 + 27E, 24 + l2SFigure 2.5-230Soil Dynamics Intake Channel Station 12 + 67E, 25 + 32SFigure 2.5-231Soil Dynamics Intake Channel Station 10 + 07E, 23 + 53SFigure 2.5-232Seismic Refraction D ynamic Properties Intake ChannelFigure 2.5-233Soil Dynamics Diesel Generator Building Down Hole Seismic 8 Refrac-tion MeasurementFigure 2.5-233aClass A Backfill -Shear Modulus Reduction with Shear StrainFigure 2.5-233bClass A Backfill -Dampi ng Ratio Variation with Shear StrainFigure 2.5-233cCrushed Stone Backfill - Sh ear Modulus Reduction with Shear StrainFigure 2.5-233dCrushed Stone Backfill - Damp ing Ratio Variation with Shear StrainFigure 2.5-233eIn Situ Cohesive Soils -

Shear Modulus Reduction with Shear StrainFigure 2.5-233fIn Situ Cohesive Soils - Da mping Ratio Variation with Shear StrainFigure 2.5-233gNon-Plastic In Situ Soil -

Shear Modulus Reduction with Shear StrainFigure 2.5-233hNon-Plastic In Situ Soils -

Damping Ratio Variation with Shear StrainFigure 2.5-233iBasal Gravel - Shear M odulus Reduction with Shear StrainFigure 2.5-233jBasal Gravel - Damping Ratio Variation with Shear StrainFigure 2.5-233kWeathered Shale - Shear Modul us and Damping Variation with Shear StrainFigure 2.5-234Main Plant Borrow Ar eas, Moisture - Penetration TestFigure 2.5-235Compaction Test Borr ow Areas (Family Of Curves) 2-xxxList of FiguresWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.5-236AOperating Basis Earthquake Response Spectra For Rock Support Struc-turesFigure 2.5-236bSafe Shutdown Earthquake Re sponse Spectra For Rock Support Struc-turesFigure 2.5-237Intake Channel Seismic Stability AnalysisFigure 2.5-238Static Design Case 2 Figure 2.5-239Intake Channel-La teral Excavation & ReplacementFigure 2.5-240Wedge Used To Determine Ho rizontal Displacement of The Intake Channel By Newmark's MethodFigure 2.5-241ERCW Piping Alignment Q (Unconsolidated Undrai ned - Undisturbed Samples)Figure 2.5-242ERCW Piping Alignment S (Direct Shea r) Undisturbed SamplesFigure 2.5-243Deleted by Amendment 71Figure 2.5-244Borrow Area 4 Q - (Unconsol idated - Undrained) 95% STD Proctor Density 3% Above Optimum Moisture Remolded SamplesFigure 2.5-245Watts Bar Nucl ear Plant Borrow Area 4R - (Consolidate Undrained) 95% STD Proctor Density 3% Below Optimum Moisture Remolded SamplesFigure 2.5-246Borrow Area 4 S -(Direct Shear) 95% STD Proctor Density 3% Below Optimum Moisture Remolded SamplesFigure 2.5-247Intake Channel Q - (Unconsol idated - Undrained - Undisturbed Sam-ples) Silty SandsFigure 2.5-248Intake Channel Q - (Unconsol idated-Undrained) Undisturded Samples Lean ClaysFigure 2.5-249Intake Channel R - (Consol idated-Undrained) Undisturbed Samples Silty SandsFigure 2.5-250Intake Channel R - (Consolid ated-Undrained) - Undisturbed Samples Lean ClaysFigure 2.5-251Intake Channel Q - (Unconsol idated Undrained) Remolded Samples 95% SDT Proctor Density 4% Above Optimum MoistureFigure 2.5-252Site Studies Intake Ch annel Additional Soils InvestigationFigure 2.5-253Intake Channel Additio nal Soil Investigation Section AAFigure 2.5-254Intake Channel Additio nal Soil Investigation Section BBFigure 2.5-255Intake Channel Additio nal Soil Investigation Section CCFigure 2.5-256Intake Channel - Lateral Ex cavation and Replacement Downstream Side of Intake Channel with Bedrock at 656Figure 2.5-257Intake Channel - Lateral Ex cavation and Replacement Downstream Side of Intake Channel with Bedrock at 650Figure 2.5-258Intake Channel - Lateral Excavation and Replacement Upstream Reser-voir End with Rockfill Placed at 665Figure 2.5-259Intake Channel - Lateral Excavation and Replacement Downstream Reservoir End With Rockfill Placed at El. 650Figure 2.5-260Soil Profile -

Borrow Area 7, Boring PAH-1Figure 2.5-261Soil Profile -

Borrow Area 7, Boring PAH-2 List of Figures2-xxxiWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.5-262Soil Profile -

Borrow Area 7, Boring PAH-3Figure 2.5-263Soil Profile -

Borrow Area 7, Boring PAH-4Figure 2.5-264Soil Profile -

Borrow Area 7, Boring PAH-5Figure 2.5-265Soil Profile -

Borrow Area 7, Boring PAH-6Figure 2.5-266Soil Profile -

Borrow Area 7, Boring PAH-7Figure 2.5-267Soil Profile -

Borrow Area 7, Boring PAH-8Figure 2.5-268Soil Profile - Borrow Area 7, Boring PAH-9 (SS, PA, HA, TP, Boring)Figure 2.5-269Soil Profile -

Borrow Area 7, Boring PAH-10Figure 2.5-270Soil Profile -

Borrow Area 7, Boring PAH-11Figure 2.5-271Compaction Test (Family of Curves) - Borrow Area 7Figure 2.5-272Moisture - Penetr ation Test - Borrow Area 7Figure 2.5-273Yard Category I ERCW Piping and Conduits Plan Figure 2.5-274Soil Profile (SS, PA , HA, TP, Boring) 1E Conduit BanksFigure 2.5-275Soil Profile (SS, PA , HA, TP, Boring) 1E Conduit BanksFigure 2.5-276Soil Profile (SS, PA, HA, TP , Boring) IE Conduit Banks Sheet 1 of 2Figure 2.5-276Soil Profile (SS, PA, HA, TP , Boring) ID Conduit Banks Sheet 2 of 2Figure 2.5-277Soil Profile (SS, PA , HA, TP, Boring) ID Conduit BanksFigure 2.5-278Soil Profile (SS, PA , HA, TP, Boring) ID Conduit BanksFigure 2.5-279Soil Profile (SS, PA , HA, TP, Boring) ID Conduit BanksFigure 2.5-280Soil Profile (SS, PA , HA, TP, Boring) ID Conduit BanksFigure 2.5-281(Please see Figures DVD for Actual Figure) (Sheet 1 of 2)Figure 2.5-281(Please see Figures DVD for Actual Figure) (Sheet 2 of 2)Figure 2.5-282Soil ProfileFigure 2.5-283Soil Profile (Sheet 1 of 2)

Figure 2.5-283Soil Profile (Sheet 2 of 2)Figure 2.5-284Soil ProfileFigure 2.5-285Soil Profile (Sheet 1 of 2)

Figure 2.5-285Soil Profile (Sheet 2 of 2)Figure 2.5-286Soil Profile (Sheet 1 of 2)Figure 2.5-286Soil Profile (Sheet 2 of 2)

Figure 2.5-287Soil Profile (Sheet 1 of 2)Figure 2.5-287Soil Profile (Sheet 2 of 2)Figure 2.5-288Soil Profile Figure 2.5-289Soil Profile (Sheet 1 of 2)Figure 2.5-289Soil Profile (Sheet 2 of 2)Figure 2.5-290Soil Profile Figure 2.5-291Soil ProfileFigure 2.5-292Soil Profile (Sheet 1 of 2)Figure 2.5-292Soil Profile (Sheet 2 of 2Figure 2.5-293Soil ProfileFigure 2.5-294Soil Profile (Sheet 1 of 2)

Figure 2.5-294Soil Profile (Sheet 2 of 2)Figure 2.5-295Soil ProfileFigure 2.5-296Soil Profile (Sheet 1 of 2) 2-xxxiiList of FiguresWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.5-296Soil Profile (Sheet 2 of 2)Figure 2.5-297Soil Profile (Sheet 1 of 2)Figure 2.5-297Soil Profile (Sheet 2 of 2)Figure 2.5-298Soil Profile (Sheet 1 of 2)Figure 2.5-298Soil Profile (Sheet 2 of 2)Figure 2.5-299Soil Profile (Sheet 1 of 2)

Figure 2.5-299Soil Profile (Sheet 2 of 2)Figure 2.5-300Soil Profile (Sheet 1 of 2)Figure 2.5-300Soil Profile (Sheet 2 of 2)

Figure 2.5-301Soil ProfileFigure 2.5-302Soil Profile (Sheet 1 of 2)Figure 2.5-302Soil Profile (Sheet 2 of 2)

Figure 2.5-303Soil Profile (Sheet 1 of 2)Figure 2.5-303Soil Profile (Sheet 2 of 2)Figure 2.5-304Soil Profile (Sheet 1 of 2)

Figure 2.5-304Soil Profile (Sheet 2 of 2)Figure 2.5-305Soil Profile (Sheet 1 of 2)Figure 2.5-305Soil Profile (Sheet 2 of 2)

Figure 2.5-306Soil ProfileFigure 2.5-307Soil Profile (Sheet 1 of 2)Figure 2.5-307Soil Profile (Sheet 2 of 2)

Figure 2.5-308Soil Profile (Sheet 1 of 2)Figure 2.5-308Soil Profile (Sheet 2 of 2)Figure 2.5-309Soil Profile Figure 2.5-310Soil ProfileFigure 2.5-311Soil ProfileFigure 2.5-312Soil Profile Figure 2.5-313Soil ProfileFigure 2.5-314Soil ProfileFigure 2.5-315Soil Profile Figure 2.5-316Soil Profile (Sheet 1 of 1)Figure 2.5-317Soil ProfileFigure 2.5-318Soil Profile Figure 2.5-319Soil ProfileFigure 2.5-320Soil ProfileFigure 2.5-321Soil Profile (Sheet 1 of 2)

Figure 2.5-321Soil Profile (Sheet 2 of 2)Figure 2.5-322Soil ProfileFigure 2.5-323Soil ProfileFigure 2.5-324Soil ProfileFigure 2.5-325Soil Profile Figure 2.5-326Soil Profile (Sheet 1 of 2)Figure 2.5-326Soil Profile (Sheet 2 of 2)Figure 2.5-327Soil Profile (Sheet 1 of 2)

List of Figures2-xxxiiiWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.5-327Soil Profile (Sheet 2 of 2)Figure 2.5-328Soil Profile (Sheet 1 of 2)Figure 2.5-328Soil Profile (Sheet 2 of 2)Figure 2.5-329Soil ProfileFigure 2.5-330Soil Profile (Sheet 1 of 2)Figure 2.5-330Soil Profile (Sheet 2 of 2)

Figure 2.5-331Blank PageFigure 2.5-332Soil Profile (Sheet 1 of 2)Figure 2.5-332Soil Profile (Sheet 2 of 2)

Figure 2.5-333Soil Profile (Sheet 1of 2)Figure 2.5-333Soil Profile (Sheet 2of 2)Figure 2.5-334Soil Profile (Sheet 1 of 2)

Figure 2.5-334Soil Profile (Sheet 2 of 2)Figure 2.5-335Soil Profile (Sheet 1 of 2)Figure 2.5-335Soil Profile (Sheet 2 of 2)

Figure 2.5-336Soil Profile (Sheet 1 of 2)Figure 2.5-336Soil Profile (Sheet 2 of 2)Figure 2.5-337Soil Profile Figure 2.5-338Soil ProfileFigure 2.5-339ERCW Route Liquefaction Evaluation Graphic Logs No. 50 & 65Figure 2.5-340ERCW Liquefaction Figure 2.5-341ERCW LiquefactionFigure 2.5-342LiquefactionFigure 2.5-343Liquefaction Figure 2.5-344LiquefactionFigure 2.5-345LiquefactionFigure 2.5-346Liquefaction Figure 2.5-347LiquefactionFigure 2.5-348LiquefactionFigure 2.5-349Liquefaction Figure 2.5-350LiquefactionFigure 2.5-351LiquefactionFigure 2.5-352Liquefaction Figure 2.5-353Results Of Stress Controlled Cyclic Triaxial Tests On ERCW Route SoilsFigure 2.5-354Liquefaction Study ERCW Pipeline Figure 2.5-355Liquefaction Study ERCW PipelineFigure 2.5-356Liquefaction Study ERCW PipelineFigure 2.5-357Liquefaction Study ERCW PipelineFigure 2.5-358Additional Soil Investigati ons Category I Soil Supported StructuresFigure 2.5-359Category I Soil Supporte d Structures Soil InvestigationFigure 2.5-360Category I Soil Supporte d Structures Soil InvestigationFigure 2.5-361Category I Soil Supporte d Structures Soil InvestigationFigure 2.5-362Category I Soil Supporte d Structures Soil Investigation 2-xxxivList of FiguresWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.5-363Category I Soil Supporte d Structures Soil InvestigationFigure 2.5-364Category I Soil Supporte d Structures Soil InvestigationFigure 2.5-365Category I Supported Structures S-Direct Shear Test Remolded Basal GravelFigure 2.5-366Soil Supported StructuresFigure 2.5-367Soil Supported Structures Figure 2.5-368Soil Supported StructuresFigure 2.5-369Soil Supported StructuresFigure 2.5-370Soil Supported Structures Figure 2.5-371Soil Supported StructuresFigure 2.5-372Gravel Boring No. 125Figure 2.5-373Gravel Boring No. 129 Figure 2.5-374Watts Bar Nuclear Plant Category I Soil Supported Structures Q - ( Un-consolidated - Undrained)

Test Fine Grained Soils (Undisturbed Samples)Figure 2.5-375Watts Bar Nuclear Plant Cate gory I Soil Supported Structures R (Total) - ( Consolidated - Undrained)

Test Fine Grained Soils (Undisturbed Samples)Figure 2.5-376Watts Bar Nuclear Plant Category I Soil S upported Structure R (Effec-tive) - (Consolidated -Undrained)

Test Fine Grained Soils (Undisturbed Sam-ples)Figure 2.5-377Soil ProfileFigure 2.5-378Soil Profile Figure 2.5-379Soil ProfileFigure 2.5-380Soil ProfileFigure 2.5-381Soil Profile Figure 2.5-382Soil ProfileFigure 2.5-383Soil Profile (Sheet 1 of 2)Figure 2.5-383Soil Profile (Sheet 2 of 2)Figure 2.5-384Soil Profile (Sheet 1 of 2)Figure 2.5-384Soil Profile (Sheet 2 of 2)Figure 2.5-385Soil ProfileFigure 2.5-386Soil ProfileFigure 2.5-387Soil ProfileFigure 2.5-388Soil ProfileFigure 2.5-389Soil Profile Figure 2.5-390Soil ProfileFigure 2.5-391aSoil ProfileFigure 2.5-392Soil Profile List of Figures2-xxxvWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.5-393Soil ProfileFigure 2.5-394Soil ProfileFigure 2.5-395Soil ProfileFigure 2.5-396Soil ProfileFigure 2.5-397Soil ProfileFigure 2.5-398Soil Profile Figure 2.5-399Soil ProfileFigure 2.5-400Soil ProfileFigure 2.5-401Soil Profile Figure 2.5-402Soil ProfileFigure 2.5-403Soil ProfileFigure 2.5-404Soil Profile Figure 2.5-405Soil ProfileFigure 2.5-406Soil ProfileFigure 2.5-407Soil Profile Figure 2.5-408Soil ProfileFigure 2.5-409Soil ProfileFigure 2.5-410Soil Profile Figure 2.5-411Soil ProfileFigure 2.5-412Soil ProfileFigure 2.5-413Soil Profile Figure 2.5-414Soil ProfileFigure 2.5-415Soil ProfileFigure 2.5-416Soil Profile Figure 2.5-417Soil ProfileFigure 2.5-418Soil ProfileFigure 2.5-419Soil Profile Figure 2.5-420Soil ProfileFigure 2.5-421Soil ProfileFigure 2.5-422Soil Profile Figure 2.5-423Soil ProfileFigure 2.5-424Soil ProfileFigure 2.5-425Soil Profile Figure 2.5-426Soil ProfileFigure 2.5-427Soil ProfileFigure 2.5-428Soil Profile Figure 2.5-429Soil ProfileFigure 2.5-430Soil ProfileFigure 2.5-431Soil ProfileFigure 2.5-432Soil ProfileFigure 2.5-433Soil Profile Figure 2.5-434Soil ProfileFigure 2.5-435Soil ProfileFigure 2.5-436Soil Profile 2-xxxviList of FiguresWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.5-437Soil ProfileFigure 2.5-438Soil ProfileFigure 2.5-439Soil ProfileFigure 2.5-440Soil ProfileFigure 2.5-441Soil ProfileFigure 2.5-442Soil Profile Figure 2.5-443Soil ProfileFigure 2.5-444Soil ProfileFigure 2.5-445Soil Profile Figure 2.5-446Soil ProfileFigure 2.5-447Soil ProfileFigure 2.5-448Soil Profile Figure 2.5-449Soil ProfileFigure 2.5-450Soil ProfileFigure 2.5-451Soil Profile Figure 2.5-452Soil ProfileFigure 2.5-453Soil ProfileFigure 2.5-454Soil Profile Figure 2.5-455Soil ProfileFigure 2.5-456Soil ProfileFigure 2.5-457Soil Profile Figure 2.5-458Soil ProfileFigure 2.5-459Soil ProfileFigure 2.5-460Soil Profile Figure 2.5-461Soil ProfileFigure 2.5-462Soil ProfileFigure 2.5-463Soil Profile Figure 2.5-464Soil ProfileFigure 2.5-465Soil ProfileFigure 2.5-466Soil Profile Figure 2.5-467Soil ProfileFigure 2.5-468Soil ProfileFigure 2.5-469Soil Profile Figure 2.5-470Soil ProfileFigure 2.5-471Soil ProfileFigure 2.5-472Soil Profile Figure 2.5-473Soil ProfileFigure 2.5-474Soil ProfileFigure 2.5-475Soil ProfileFigure 2.5-476Soil ProfileFigure 2.5-477Soil Profile Figure 2.5-478Soil ProfileFigure 2.5-479Soil ProfileFigure 2.5-480Soil Profile List of Figures2-xxxviiWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.5-481Soil ProfileFigure 2.5-482Soil ProfileFigure 2.5-483Soil ProfileFigure 2.5-484Soil ProfileFigure 2.5-485Soil ProfileFigure 2.5-486Soil Profile Figure 2.5-487Soil ProfileFigure 2.5-488Soil ProfileFigure 2.5-489Soil Profile Figure 2.5-490Soil ProfileFigure 2.5-491Soil ProfileFigure 2.5-492Soil Profile Figure 2.5-493Soil ProfileFigure 2.5-494Soil ProfileFigure 2.5-495Soil Profile Figure 2.5-496Soil ProfileFigure 2.5-497Soil ProfileFigure 2.5-498Soil Profile Figure 2.5-499Soil ProfileFigure 2.5-500Soil ProfileFigure 2.5-501Soil Profile Figure 2.5-502Soil ProfileFigure 2.5-503Soil ProfileFigure 2.5-504Soil Profile Figure 2.5-505Soil ProfileFigure 2.5-506Soil ProfileFigure 2.5-507Soil Profile Figure 2.5-508Soil ProfileFigure 2.5-509Soil ProfileFigure 2.5-510Soil Profile Figure 2.5-511Soil ProfileFigure 2.5-512Soil ProfileFigure 2.5-513Soil Profile Figure 2.5-514Soil ProfileFigure 2.5-515Soil ProfileFigure 2.5-516Soil Profile Figure 2.5-517Soil ProfileFigure 2.5-518Soil ProfileFigure 2.5-519Soil ProfileFigure 2.5-520Watts Bar Nucl ear Plant Undergro und Barrier Trench A Backfill R - (Consolidated -Undrained) 95% ST D Proctor Density (ASTM D698) 3% Below Optimum MoistureFigure 2.5-521Watts Bar Nucl ear Plant Undergro und Barrier Trench A Backfill R ( Consolidated -Undrained) 100%

STD Proctor Density (ASTM D698) 2-xxxviiiList of FiguresWATTS BARWBNP-91 LIST OF FIGURES SectionTitle 3% Below Optimum Moisture ContentFigure 2.5-522Watts Bar Nucl ear Plant Undergro und Barrier Trench B Backfill R ( Consolidated - Undrained) 95%

STD Proctor Density (ASTM D698) 3% Below Optimum Moisture ContentFigure 2.5-523Watts Bar Nucl ear Plant Undergro und Barrier Trench B Backfill R ( Consolidated -Undrained) 100%

STD Proctor Density (ASTM D698) 3% Below Optimum Moisture ContentFigure 2.5-524ERCW Liquefaction Trench A BorrowFigure 2.5-525ERCW Liquefaction Trench A Supplemental Borrow Figure 2.5-526ERCW Liquefaction Trench BFigure 2.5-527ERCW Lique faction Borrow Area 9Figure 2.5-528ERCW Lique faction Borrow Area 10Figure 2.5-529ERCW Lique faction Borrow Area 11Figure 2.5-530ERCW Lique faction Borrow Area 12Figure 2.5-531ERCW Lique faction Borrow Area 13Figure 2.5-532ERCW Lique faction Borrow Area 2CFigure 2.5-533ERCW Lique faction Borrow Area 2CFigure 2.5-534ERCW Liquefaction Trench A Figure 2.5-535ERCW Liquefaction Trench A Supplemental BorrowFigure 2.5-536ERCW Liquefaction Trench BFigure 2.5-537ERCW Lique faction Borrow Area 9Figure 2.5-538ERCW Lique faction Borrow Area 10Figure 2.5-539ERCW Lique faction Borrow Area 11Figure 2.5-540ERCW Lique faction Borrow Area 12Figure 2.5-541ERCW Lique faction Borrow Area 13Figure 2.5-542ERCW Lique faction Borrow Area 2CFigure 2.5-543ERCW Lique faction Borrow Area 2CFigure 2.5-544Watts Bar Nucl ear Plant Granular Fill (1032) Q-(Unconsolidated-Undrained) 70% Relati ve Density (ASTM D2049)Figure 2.5-545Watts Bar Nuclear Plant Granular Fill (1032)

S-Direct Shear 70% Rel-ative Density (ASTM 02049)Figure 2.5-546Watts Bar Nuclear Plant Granular Fill (1032) Q- (Unconsolidated -

Undrained) 80% Relati ve Density (ASTM D2049)Figure 2.5-547Watts Bar Nucl ear Plant Granular Fill (1032) R- (Consolidated-Undrained) S-Direct: Shear 80%

Relative Density (ASTM D2049)Figure 2.5-548Summary. of Granular Fill Test Data -Relacive"Density Diesel Genera-tor BuildingFigure 2.5-549ERCW Pipeline Section A-A (Please see Figures DVD for Actual Fig-ure) (Sheet 1 of 4)Figure 2.5-549ERCW Pipeline Section A-A (Please see Figures DVD for Actual Fig-ure) (Sheet 2 of 4)Figure 2.5-549ERCW Pipeline Section A-A (Please see Figures DVD for Actual Fig-ure) (Sheet 3 of 4)Figure 2.5-549ERCW Pipeline Section A-A (Please see Figures DVD for Actual Fig-List of Figures2-xxxixWATTS BARWBNP-91 LIST OF FIGURES SectionTitle ure) (Sheet 4 of 4)Figure 2.5-550ERCU Pipeline Section B-B (P lease see Figures DVD for Actual Fig-ure)Figure 2.5-551ERCU Pipeline Section C-C (P lease see Figures DVD for Actual Fig-ure)Figure 2.5-552ERCW Pipeline Section D-D Figure 2.5-553ERCW Pipeline Section E-EFigure 2.5-554Category I Electrical Conduits Section F-F (Please see Figures DVD for Actual Figure)(Sheet 1 of 2)Figure 2.5-554Category I Electrical Conduits Section F-F (Please see Figures DVD for Actual Figure)(Sheet 2 of 2)Figure 2.5-555Category I Electrical Condui ts Section G-G (Please see Figures DVD for Actual Figure)Figure 2.5-556Category I Electrical Condui ts Section H-H (Please see Figures DVD for Actual Figure)Figure 2.5-557Class IE ConduitFigure 2.5-558Class IE ConduitFigure 2.5-559Class IE Conduit Figure 2.5-560Class IE ConduitFigure 2.5-561Class IE ConduitFigure 2.5-562Class IE Conduit Figure 2.5-563Class IE ConduitFigure 2.5-564ERCU & HPFP SystemFigure 2.5-565ERCU & HPFP System Figure 2.5-566Intake Channel Grain Size AnalysisFigure 2.5-567ERCW Piping System - Generalized Profile TVA DWG NO. 604K1009 ROFigure 2.5-568ERCW Piping System - Generalized Profile TVA DWG NO. 604K1010 ROFigure 2.5-569One-Dimensional Soil Prof ile Used for Liquefaction EvaluationFigure 2.5-570Comparison of Induced Shear Stress and Shear Stress Required to Cause 5% Strain and Resulting Factors Of Safety With Depth Below Ground SurfaceFigure 2.5-571ERCW Pipeline Section A-A(Please See Figures DVD For Actual Figure)(Sheet 1 of 4)Figure 2.5-571ERCW Pipeline Section A-A(Please See Figures DVD For Actual Figure)(Sheet 2 of 4)Figure 2.5-571ERCW Pipeline Section A-A(Please See Figures DVD For Actual Figure)(Sheet 3 of 4)Figure 2.5-571ERCW Pipeline Section A-A(Please See Figures DVD For Actual Figure)(Sheet 4 of 4)Figure 2.5-572ERCW Pipeline Section B-BFigure 2.5-573(Please see Figur es DVD for Actual Figure)Figure 2.5-574ERCW Pipeline Section D-D 2-xlList of FiguresWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.5-575ERCW Pipeline Section E-EFigure 2.5-576Category I Electr ical Conduits Section F-F(Please see Figures DVD for Ac tual Figure)(Sheet 1 of 2)Figure 2.5-576Category I Electr ical Conduits Section F-F(Please see Figures DVD for Ac tual Figure)(Sheet 2 of 2)Figure 2.5-577Category I Electr ical Conduits Section G-G(Please see Figures DV D for Actual Figure)Figure 2.5-578Category I Electr ical Conduits Section H-H(Please see Figures DV D for Actual Figure)Figure 2.5-579Miscellaneous ERCW Piping and IE Conduit Soil Borings(Please See Figures DVD For Actual Figure)Figure 2.5-580Yard Underg round Barriers for Potent ial Soil Liquefaction TVA DWGNO. 10N213-1 R1Figure 2.5-581Yard Underg round Barriers for Potent ial Soil Liquefaction TVA DWGNO. 10N213-2 R6Figure 2.5-582Yard Category I ER CW Piping and Conduits - PlanFigure 2.5-583Remedial Treatment for Potential Soil Liquefaction -Stability Analysis Summary (Please See Figures DVD For Actual Figure)Figure 2.5-584Finished Grading - Underg round Barrier As-Bui lt Cross-SectionsFigure 2.5-585Powerhouse -Settlemen t Stations -Bench Mark AssemblyFigure 2.5-586Settlement VS. Time For Unit 1 Reactor BuildingFigure 2.5-587Settlement VS. Time For Unit 2 Reactor BuildingFigure 2.5-588Maximum Settleme nt -Auxiliary Building Set tlement Station 10; Mini-mum Settlement -Auxiliary Building Settlement Station 20 (1973-1982)(Please see Figures DV D for Actual Figure)Figure 2.5-589Maximum Settlement - Diesel Generator Building Settlenent Station 1

& Intake Pumping Station Settlement Station 3A; Minimum Settlement Diesel Generator Building Settlement Station 4 &

Intake Pumping Station Se ttlement Station 4 (1975-1982)(Please see Figures DV D for Actual Figure)Figure 2.5-590General Location Of Relative Movement Detectors TVA DWG NO. 10N203-3 R1Figure 2.5-591Watts Bar Dam Probability Di stribution: November - March Rainfall Period 1940 - 1983Figure 2.5-592Yard ERCW Pipeline EST. 25-YR High Water TableFigure 2.5-593Water Table ProfilesFigure 2.5-594Yard Underground Barrier Trench A STA 1 + 78(Please See Figures DVD For Actual Figure)Figure 2.5-595Yard Underground Barrier Trench A STA 3 + 78(Please See Figures DVD For Actual Figure)Figure 2.5-596Yard Underground Barrier Trench A STA 5 + 78(Please See Figures DVD For Actual Figure)

List of Figures2-xliWATTS BARWBNP-91 LIST OF FIGURES SectionTitleFigure 2.5-597Yard Underground Barrier Trench A STA 7 + 78(Please See Figures DVD For Actual Figure)Figure 2.5-598Summary of Earthfill Test Data - DensityFigure 2.5-599Summary Of Earthfil l Test Data -Moisture ContentFigure 2.5-600Summary Of Earthfill Test Data -DensityFigure 2.5-601Summary Of Earthfil l Test Data -Moisture ContentFigure 2.5-602Yard Underground Barrier Trench B STA 1 + 100(Please See Figures DVD For Actual Figure)Figure 2.5-603Yard Underground Barrier Trench B STA 2 + 50(Please See Figures DVD For Actual Figure)Figure 2.5-604Yard Underground Barrier Trench B STA 3 + 00(Please See Figures DVD For Actual Figure)Figure 2.5-605Yard Underground Barrier Trench B STA 4 + 50(Please See Figures DVD For Actual Figure)Figure 2.5-606Summary of Fill Test Data -Density Figure 2.5-607Summary of Earthfill Test Data - Moisture ContentFigure 2.5-608Summary of Eart hfill Test Data -DensityFigure 2.5-609Summary of Earthfill Test Data - Moisture ContentFigure 2.5-610Summary of Granular Fi ll Test Data - Relative Density GEOGRAPHY AND DEMOGRAPHY 2.1-1WATTS BARWBNP-922.0 SITE CHARACTERISTICS2.1 GEOGRAPHY AND DEMOGRAPHY2.1.1 Site Location and Description

2.1.1.1 Specificat ion of LocationThe Watts Bar Nuclear Plant is located on a tract of approximately 1770 acres in Rhea County on the west bank of the Tennessee River at river mile 528. The site is approximately 1-1/4 miles south of the Watts Bar Dam and approximately 31 miles north-northeast of the Sequoyah Nuclear Plant.The 1770 acre reservation is owned by the United States and is in the custody of TVA. Also located within the reservation are the Watts Bar Dam and Hydro-Electric Plant, the Watts Bar Steam Plant, the TVA Central Maintenance Facility, and the Watts Bar Resort Area.The resort area buildings and improvements have been sold to private individuals and the associated land mass leased to the Watts Bar Village Corporation, Inc. Due to this sale and leasing arrangement no services are provided to the resort area from the Watts Bar Nuclear Plant.The location of each reactor is given below:

2.1.1.2 Site Area MapFigure 2.1-1 is a map of the TVA area showing the location of all power plants. Figure 2.1-2 shows the Watts Bar site location with respect to prominent geophysical and political features of the area. This map is used to correlate with the population distribution out to 50 miles. The population density within 10 miles is keyed to Figure 2.1-3. This map shows greater detail of the site area. Figures 2.1-4a and 2.1-4b are maps of the Watts Bar Site Area. The Watts Bar reservation boundary and the exclusion area boundary are boldly outlined. Details of the site and the plant structures may be found on Figure 2.1-5.LONGITUDE AND LATITUDE (degrees/minutes/seconds)UNIT 1 35

°36' 10.430" N84°47' 24.267" WUNIT 2 35

°36' 10.813" N84°47' 21.398" WUNIVERSAL TRANSVERSE MERCATOR (Meters)NorthingEastingUNIT 1 N3, 941,954.27E 700,189.94 UNIT 2 N3, 941,967.71E 700,261.86

2.1-2GEOGRAPHY AND DEMOGRAPHY WATTS BARWBNP-94 2.1.1.3 Boundaries for Esta blishing Effluent LimitsThe boundary on which limits for the release of radioactive effluents are based is the site boundary shown in Figure 2.1-4b.

2.1.2 Exclusion Area Authority And ControlDue to the large size of the Watts Bar site, the exclusion area boundary is smaller than, and is completely within, the site boundary. The exclusion area is determined by a circle of radius 1200 meters centered on a point 20 feet from the north wall of the turbine building along the building centerline. The exclusion area boundary will be clearly marked on all access roads. The exclusion area is shown on Figure 2.1-4b.2.1.2.1 AuthorityAll of the land inside the exclusion area is owned by the United States and in the custody of TVA. TVA controls all activities within the reservation.2.1.2.2 Control of Activities Unrelated to Plant OperationThere will be no residences, unauthorized commercial operations, or recreational areas within the exclusion area. No public highways or railroads transverse the exclusion area. A portion of the Tennessee River does, however, cross the eastern portion of the exclusion area. This portion of the river is accessible for fishing, pleasure boating, and commercial transportation.2.1.2.3 Arrangements for Traffi c ControlArrangements have been made and formalized through the Tennessee Multi-jurisdictional Radiological Emergency Plan to establish traffic control responsibilities on the portion of the Tennessee river within the exclusion zone as follows: (a)Non-commercial traffic - Tennessee Wildlife Resources Agency (TWRA).(b)Commercial traffic - U.S. Coast Guard (USCG).

2.1.2.4 Abandonment or Relocation of RoadsNo public roads cross the exclusion area.

2.1.3 Population DistributionHistorical and projected population information is contained in this section. Both resident and transient populations are included. For 2000, population was based on data from the U.S. Census Bureau, Census of Population, 2000, including block group, block, and census track data. Projections were based on county projections by Woods& Poole.Economic Analysis Division, Bureau of Economic Analysis, U.S. Department of Commerce, 1992. Subcounty population estimates were prepared using a constant share of the 1990 county total. County Census maps and 1:250,000 topographic maps were used to disegregate sub-county population data into the annular segments.

GEOGRAPHY AND DEMOGRAPHY 2.1-3WATTS BARWBNP-94Considerations included municipal limits, topography, road system, land ownership (e.g., National Forest), and land use (e.g., strip mines).Transient population consists of two components - recreation visitation and school enrollments. Peak hour visitation to recreation facilities is based on the maximum capacity of the facility plus some overflow. For2008 are from the Tennessee

Department of Education Report Card 2008 (http://www.state.tn.us/education/). Projected enrollments are based on projected population growth in the respective counties.2.1.3.1 Populati on Within 10 MilesAbout 18,900 people lived within 10 miles of the Watts Bar site in 2000, with more than 75% of them between five and 10 miles from the site. Two small towns, Spring City and Decatur, which in 2007 had populations of 2,002 and 1,456 respectively, are located between five and 10 miles from the site. Decatur is south and of the site, while Spring City is northwest and north-northwest. Most of the remainder of the area is sparsely populated, especially within five miles of the site. The pattern is expected to continue.Tables 2.1-2 through 2.1-8b show the estimated and projected population distribution within ten miles of the site for 2000, 2010, 2020, 2030, 2040, 2050, and 2060. Figure 2.1-3 shows the area within ten miles of th e site overlaid by circles and sixteen compass sectors.

2.1.3.2 Population Be tween 10 and 50 MilesThe area between 10 and 50 miles from the site lies mostly in the lower and middle portions of east Tennessee, with small areas in southwestern North Carolina and in northern Georgia. The population of this area is projected to increase by about 62%, or 660,000 persons, between 2000 and 2060. About 71% of this total increase is expected to be in the area between 30 and 50 miles from the site.The largest urban concentration between 10 and 50 miles is the city of Chattanooga, located to the southwest and south-southwest. This city had a population in 2007 of 169,884; about 80% of this population is located between 40 and 50 miles from the site, while the rest is located beyond 50 miles. The city of Knoxville is located to the east-northeast of the site and is slightly larger than Chattanooga. However, only a small share, less than 10 percent, of its population of 183,546, is located between 40 and 50 miles of the site with the remainder beyond 50 miles.There are three smaller urban concentrations in this area with population greater than 20,000. The city of Oak Ridge, which had a 2007 population of 27,514, is located about 40 miles to the northeast. The twin cities of Alcoa and Maryville, which had a combined population in 2007 of about 35,300, are located between 45 to 50 miles to the east-northeast. Cleveland, with a 2007 population of 39,200, is located about 30 miles to the south. Most of the population growth is expected to occur around these and the larger population centers.

2.1-4GEOGRAPHY AND DEMOGRAPHY WATTS BARWBNP-94There are, in addition, a number of sm aller communities dispersed throughout the area, surrounded by low-density rural areas.Tables 2.1-8 through 2.1-14 contain the 2000, 2010, 2020, 2030, 2040,2050, and 2060 population distribution at various distances and directions from the site out to 50 miles. Figure 2.1-2 shows the area within 50 miles of the site overlaid by the circles and 16 compass sectors.

2.1.3.3 Transient PopulationTransient population consists of visitors to recreation sites and students in schools. There are no major active industrial facilities or other major employers in the vicinity of the plant.Recreation--Estimated and projected peak hour visitation to recreation facilities within 10 miles of the plant are contained in Tables 2.1-15 through 2.1-21. The visitation is based on the maximum capacity of facilities plus some overflow. Capacities are based on the TVA data base of recreation facilities in the area. There are no recreation facilities beyond 10 miles which are large enough to cause significant variations in the total population within any annular segment.Schools--Eight schools are currently located within ten miles of Watts Bar Nuclear Plant. In 2008, these schools served 4,155 students, distributed as shown in Table 2.1-22. Enrollments for 2008 are from the Tennessee Department of Education Report Card 2008 (http://www.state.tn.us/education/). Enrollments at these schools are projected based on county population projections by Woods & Poole.

2.1.3.4 Low Population ZoneThe low population zone (LPZ) distance as defined in 10 CFR 100 has been chosen to be three miles (4828 meters). The population of this area (2976 in 2010) and the population density (105 people per square mile in 2010) are both low. Population includes permanent residents (759) and transients (2217) estimates for 2010. Transients are "Peak Hour Recreation Visitors". In addition, this area is of such size that in the unlikely event of a serious accident there is a reasonable probability that appropriate measures could be taken to protect the health and safety of the residents. Specific provisions for the protection of this area are considered in the development of the Watts Bar Nuclear Plant site emergency plan. The present and projected population figures for this area are included in Tables 2.1-1a through 2.1-8b. Features of the area within the low population zone distances are shown on Figure 2.1-3.

2.1.3.5 Popul ation CenterThe nearest population center (as defined by 10 CFR 100) is Cleveland, Tennessee, which had a 2007 population of 39,200. Cleveland is located approximately 30 miles south of the Watts Bar site.

2.1.3.6 Population DensityCumulative population around the site out to 30 miles is plotted on Figures 2.1-20 and 2.1-21 for 2010 and 2060 . Also plotted on Figure 2.1-20 is the cumulative population GEOGRAPHY AND DEMOGRAPHY 2.1-5WATTS BARWBNP-94that would result from a uniform population density of 500 persons per square mile. Figure 2.1-21 contains a similar plot except that it is for a uniform density of 1,000 persons per square mile. For all distances for both years the population around the site is significantly smaller than that based on the uniform population density. REFERENCESNone.

2.1-6GEOGRAPHY AND DEMOGRAPHY WATTS BARWBNP-94Table 2.1-1 Watts Bar2000 Population DistributionWithin 10 Miles of the Site(Sheet 1 of 1)DistanceFrom Site(Miles)Direction0-11-22-33-44-55-100-10 NNNE NE ENE E ESE SE SSE SSSW SWWSW W WNW NWNNWTOTAL 0 0

0 0

0 0

4 10 8 0

0 0

0 0

0 0 22 9 0

0 0

4 0

0 0

0 0

0 4 10 0 75 0102 0 9

9 9210 0 0

0 0 10 0 25 15 15230 0532 0200 150 150 150 13 14120 0 0

0 41 70 87260 1201,375 66 90140 140 300 20 19201 966 0 0 87 62 55364 852,595 1,674862 403 242 1,553377 406 614 1,863266 727 492 491 339 1,837 2,15614,302 1,749 1,161702 541 2,217410 443 945 2,837276 727 649 648 496 2,766 2,36118,928 GEOGRAPHY AND DEMOGRAPHY 2.1-7WATTS BARWBNP-94Table 2.1-2 Watts Bar2010 Population DistributionWithin 10 Miles Of The Site(Sheet 1 of 1)Distance From SiteMilesDirection0-11-22-33-44-55-100-10N01000731,8631,946NE00102231009591,292NE0011184171494860ENE0011184171296662E052571843671,9022,715ESE0001624462502SE5001723497542SSE12001472467521,157S 100001,1832,2823,475SSW001200326338SW 00000809809WSW 04284697548723W 011177869546721WNW 00179761377552NW 0832562894052,0443,077NNW000134952,3992,628TOTAL 27113 6191,599 3,08516,55621,999 2.1-8GEOGRAPHY AND DEMOGRAPHY WATTS BARWBNP-94Table 2.1-3 Watts Bar 2020 Population DistributionWithin 10 Miles Of The Site(Sheet 1 of 1) Distance From SiteMilesDirection0-11-22-33-44-55-100-10N 01100812,0642,157NNE 00112471111,0631,432NE 00142352196301,098ENE0014235219379846E 063292354692,4303,468ESE 0002031590641SE 6002230635693SSE 16001883149611,478S 130001,5112,9144,438SSW001600416432SW 00000896896WSW 053151107607800W 012188676605799WNW 001810768418612NW 0922843214492,2653,411NNW 0001481052,6582,911TOTAL 351267351,8953,79019,53126,112 GEOGRAPHY AND DEMOGRAPHY 2.1-9WATTS BARWBNP-94Table 2.1-4 Watts Bar 2030 Population DistributionWithin 10 Miles Of The Site(Sheet 1 of 1) Distance From SiteMilesDirection0-11-22-33-44-55-100-10N01200902,2842,386NNE00122731231,1761,584NE00172872687701,342ENE 00172872684631,035E 084012875742,9694,239ESE 0002538721784SE 8002736776847SSE19002293841,1741,806S 150001,8473,5615,423SSW001900509528SW00000992992WSW053456119671885W 014209685670885WNW002011975463677NW 01023143554972,5073,775NNW0001641162,9423,222TOTAL 42 1418542,2054,52022,64830,410 2.1-10GEOGRAPHY AND DEMOGRAPHY WATTS BARWBNP-94Table 2.1-5 Watts Bar 2040 Population DistributionWithin 10 Miles Of The Site (Sheet 1 of 1)Distance From SiteMilesDirection0-11-22-33-44-55-100-10N 01300962,4322,541NNE 00132911311,2521,687NE 00203263048751,525ENE 00203263045251,175E 094563266513,3704,812ESE0002843818889SE 9003041881961SSE22002604361,3332,051S 170002,0964,0436,156SSW002200577599SW000001,0561,056WSW063660126715943W 0152210290713942WNW002212680492720NW 01093343785292,6694,019NNW0001741233,1323,429TOTAL 481529452,4275,05024,88333,505 GEOGRAPHY AND DEMOGRAPHY 2.1-11WATTS BARWBNP-94Table 2.1-6 Watts Bar 2050 Population DistributionWithin 10 Miles Of The Site(Sheet 1 of 1)Distance From SiteMilesDirection0-11-22-33-44-55-100-10N 014001032,6162,733NNE00143131411,3471,815NE00223703469951,733ENE00223703465971,335E 0105183707403,8335,471ESE00032499311,012SE 100035471,0021,094SSE25002964961,5162,333S 200002,3844,5987,002SSW002500657682SW000001,1361,136WSW0639641367691,014W01623109977671,012WNW002313686530775NW 01173594065692,8714,322NNW0001881333,3693,690TOTAL 55 1631,045 2,6895,67327,53437,159 2.1-12GEOGRAPHY AND DEMOGRAPHY WATTS BARWBNP-94Table 2.1-7 Watts Bar 2060 Population DistributionWithin 10 Miles Of The Site(Sheet 1 of 1)Distance From SiteMilesDirection0-11-22-33-44-55-100-10N015001102,8002,925NNE00153351511,4421,943NE00254153871,1151,942ENE 00254153876691,496E 0115814158304,2966,133ESE00036551,0431,134SE 110039531,1231,226SSE28003325561,6982,614S 220002,6725,1547,848SSW002800736764SW000001,2161,216WSW0742691468231,087W017251171048211,084WNW002514692567830NW 01253854356093,0734,627NNW0002011423,6073,950TOTAL 61 1751,151 2,9556,29430,18340,819 GEOGRAPHY AND DEMOGRAPHY 2.1-13WATTS BARWBNP-83 2.1-14GEOGRAPHY AND DEMOGRAPHY WATTS BARWBNP-94Table 2.1-8 Watts B a r 2000 Population DistributionWithin 5 0 Miles Of The S ite(Sheet 1 of 1)Direction0-1010-2020-3030-4040-50TotalN 1,7491,2591,6023,1324,47512,217NNE1,1619,60415,20610,3071,79038,068NE7022,94113,74222,02255,63495,041ENE5412,49316,12836,931154,413210,506E 2,2177,59811,79816,63023,59961,842ESE4104,78213,2013,3062,24723,946SE 44315,23911,5272,9363,35333,498SSE9456,87110,2592,39726,21846,690S 2,8373,16429,10738,75811,40385,269SSW2762,78934,03137,21592,251166,562SW7279,36512,61052,88097,063172,645WSW6498,9462,0672,0312,74416,437W6482,4094,0832,2704,30013,710WNW4961,5153,0554,42415,26224,752NW 2,7661,87410,4876,06611,38332,576NNW2,36190019,0466,5334,45033,290TOTAL18,92881,749207,949247,838510,5851,067,049 GEOGRAPHY AND DEMOGRAPHY 2.1-15WATTS BARWBNP-94Table 2.1-9 Watts B a r 2010 Population DistributionWithin 5 0 Miles Of The S ite(Sheet 1 of 1)Direction0-1010-2020-3030-4040-50TotalN 1,9471,4991,7333,3884,84113,407NNE1,29210,08015,96010,8181,93640,087NE8603,08714,42323,11460,063101,547ENE6633,07519,89245,550175,297244,276E 2,7168,19113,65619,24928,71972,531ESE5025,15515,2803,8272,60127,365SE 54316,142813,3423,3983,42737,138SSE1,1587,40711,0592,58429,01751,225S 3,4753,41132,21442,89512,62094,615SSW3382,86731,98238,25594,830171,272SW80910,42312,96254,358110,380188,932WSW7229,9562,3512,3103,12018,459W7212,6014,2102,3404,43314,306WNW5521,6363,1504,56116,61426,513NW 3,0782,23111,4166,60312,39135,720NNW2,6281,07222,6787,7794,92939,084TOTAL22,00389,118229,308271,030565,2181,176,677 2.1-16GEOGRAPHY AND DEMOGRAPHY WATTS BARWBNP-94Table 2.1-10 Watts B a r 2020 Population DistributionWithin 5 0 Miles Of The S ite(Sheet 1 of 1)Distance From SiteMilesDirection0-1010-2020-3030-4040-50TotalN 2,157173619313,7765,39514,995NNE1,43210,67116,89511,4522,15842,608NE1,0983,26815,26924,46967,259111,362ENE8463,69623,91354,758198,719281,932E 3,4688,68414,84020,91834,69282,602ESE6415,46516,6054,1582,82629,696SE 69317,41614,4993,6933,63039,931SSE1,4787,85311,7252,73932,18255,978S 4,4383,61635,72847,57513,997105,355SSW4322,97936,34639,74798,527178,030SW89611,54713,46856,477114,879197,268WSW80011,0312,4462,4043,24819,929W7992,7734,5342,5214,77515,401WNW6121,7443,3924,91217,84928,509NW 3,4112,58412,2657,09413,31338,666NNW2,9111,24126,2629,0085,29344,716TOTAL26,11396,304250,119295,702618,7411,286,979 GEOGRAPHY AND DEMOGRAPHY 2.1-17WATTS BARWBNP-94Table 2.1-11 Watts B a r 2030 Population DistributionWithin 5 0 Miles Of The S ite(Sheet 1 of 1)Direction0-1010-2020-3030-4040-50TotalN 2,3871,9902,1484,1995,99916,723NNE1,58411,34717,96612,1782,40045,475NE1,3423,47516,23626,01975,084122,156ENE1,0344,35828,19564,563244,050322,200E 4,2389,26916,17022,79341,04693,516ESE7845,83418,0934,5313,08032,322SE 84718,59015,7994,0243,87143,131SSE1,8078,38212,5152,92435,64461,272S 5,4233,86039,57152,69215,502117,048SSW5283,12438,12341,689103,342186,806SW99212,77914,12659,238120,676207,811WSW88612,2072,5702,5253,41221,600W8842,9754,9072,7285,16716,661WNW6771,8713,6715,31619,47931,014NW 3,7742,96213,3857,74214,52842,391NNW3,2221,42230,09910,3245,71550,782TOTAL30,409104,445273,574323,485678,9951,410,908 2.1-18GEOGRAPHY AND DEMOGRAPHY WATTS BARWBNP-94Table 2.1-12 Watts B a r 2040 Population DistributionWithin 5 0 Miles Of The S ite(Sheet 1 of 1)Direction0-1010-2020-3030-4040-50TotalN 2,5412,2182,2814,4606,37317,873NNE1,68711,74718,59912,6072,54947,189NE1,5243,59716,80826,93580,896129,760ENE1,1744,91831,81472,849244,656355,411E 4,8119,77317,51824,69246,384103,178ESE8906,15119,6014,9093,33634,887SE 96119,60117,1554,3593,98546,021SSE2,0518,83813,1963,08338,51365,681S 6,1574,07042,75756,93416,750126,668SSW5993,21539,23142,901106,346192,292SW1,05613,60514,53760,959127,447217,604WSW94312,9962,7142,6673,60322,923W9413,1504,9842,7715,24917,095WNW7211,9813,7295,40019,94531,776NW 4,0183,30213,7058,12914,87544,029NNW3,4301,58633,56011,5126,09256,180TOTAL33,504110,748292,149345,167726,9991,508,567 GEOGRAPHY AND DEMOGRAPHY 2.1-19WATTS BARWBNP-94Table 2.1-13 Watts B a r 2050 Population DistributionWithin 5 0 Miles Of The S ite(Sheet 1 of 1)Direction0-1010-2020-3030-4040-50TotalN 2,7332,4572,4524,7956,85119,288NNE1,81412,27519,43513,1742,74049,438NE1,7333,75917,56428,14787,451138,654ENE1,3355,52235,72681,809267,271391,663E 5,47210,30818,87826,61052,132113,400ESE1,0126,48821,1235,2903,56937,509SE 1,09320,67418,4454,6984,15149,061SSE2,3339,32213,9183,25241,61270,437S 7,0024,29346,19761,51518,098137,105SSW6813,32540,57544,371109,989198,941SW1,13614,63515,03563,048134,126227,980WSW1,01413,9802,8652,8073,79224,449W1,0133,3355,2042,8935,48017,925WNW7752,0973,8945,63821,00233,406NW 4,3233,65814,4318,56016,06347,035NNW3,6901,75737,17612,7526,49061,865TOTAL37,159117,885312,909369,359780,8441,618,156 2.1-20GEOGRAPHY AND DEMOGRAPHY WATTS BARWBNP-94Table 2.1-14 Watts B a r 2060 Population DistributionWithin 5 0 Miles Of The S ite(Sheet 1 of 1)Direction0-1010-2020-3030-4040-50TotalN 2,9262,6962,6245,1297,32920,704NNE1,94212,80420,27213,7412,93151,690NE1,9423,92118,32029,35994,005147,547ENE1,4976,12739,63990,768289,886427,917E 6,13310,84320,23928,52857,880123,623ESE1,1346,82422,6465,6713,85540,130SE 1,22521,74819,7745,0374,31752,101SSE2,6149,80614,6413,42144,71175,193S 7,8484,51549,63866,09719,446147,544SSW7633,43541,91945,841113,633205,591SW1,21615,66615,53365,136140,806238,357WSW1,08614,9652,9992,9463,98125,977W1,0843,5195,4243,0165,71218,755WNW8302,2134,0585,87722,06035,038NW 4,6274,01415,5448,99116,87250,048NNW3,9491,92840,79213,9926,88867,549TOTAL40,816125,024334,062393,550834,3121,727,764 GEOGRAPHY AND DEMOGRAPHY 2.1-21WATTS BARWBNP-94Table 2.1-15 Watts Bar 2009 Estimated Peak Recreation VisitationWithin 10 Miles Of The Site(Sheet 1 of 1)DistanceMilesDirection0-11-22-33-44-55-100-10N 45000180000630NNE130017501256301,060NE125018001,2501,7023,257ENE1251252901201200780E 000000000000000SE 0000000SSE0000000S 1150014000255SSW04000110480630SW011511000115340WSW0000000W0000000WNW0000000NW 000002,1252,125NNW000001,0321,032TOTAL945 2809352601,6056,08410,109 2.1-22GEOGRAPHY AND DEMOGRAPHY WATTS BARWBNP-94Table 2.1-16 Watts Bar 2010 Estimated Peak Recreation VisitationWithin 10 Miles Of The Site(Sheet 1 of 1)DistanceMilesDirection0-11-22-33-44-55-100-10N 4620185000647NNE133018001286461,087NE128018501,2821,7463,341ENE1281282981231230800E 0000000ESE0000000SE 0000000SSE0000000S 1180014400262SSW04100113492646SW011811300118349WSW0000000W0000000WNW0000000NW 000002,1802,180NNW000001,0591,059TOTAL969 2879612671,6466,24110,371 GEOGRAPHY AND DEMOGRAPHY 2.1-23WATTS BARWBNP-94Table 2.1-17 Watts Bar 2020 Estimated Peak Recreation VisitationWithin 10 Miles Of The Site(Sheet 1 of 1)DistanceMilesDirection0-11-22-33-44-55-100-10N 5080203000711NNE147019801417121,198NE141020301,4121,9233,679ENE1411413281361360882E 0000000ESE0000000SE 0000000SSE0000000S 1300015800288SSW04500124542711SW013012400130384WSW0000000W0000000WNW0000000NW 000002,4012,401NNW000001,1661,166TOTAL1,067 3161,0562941,8136,87411,420 2.1-24GEOGRAPHY AND DEMOGRAPHY WATTS BARWBNP-94Table 2.1-18 Watts Bar 2030 Estimated Peak Recreation VisitationWithin 10 Miles Of The Site(Sheet 1 of 1)DistanceMilesDirection0-11-22-33-44-55-100-10N 5600224000784NNE162021801567841,320NE156022401,5562,1194,055ENE1561563611491490971E 0000000ESE0000000SE 0000000SSE0000000S 1430017400317SSW05000137598785SW014313700143423WSW0000000W0000000WNW0000000NW 000002,6452,645NNW000001,2851,285TOTAL1,177 3491,1643231,9987,57412,585 GEOGRAPHY AND DEMOGRAPHY 2.1-25WATTS BARWBNP-94Table 2.1-19 Watts Bar 2040 Estimated Peak Recreation VisitationWithin 10 Miles Of The Site(Sheet 1 of 1)DistanceMilesDirection0-11-22-33-44-55-100-10N 5810232000813NNE168022601618131,368NE161023201,6142,1974,204ENE16116137415515501,006E 0000000ESE0000000SE 0000000SSE0000000S 1480018100329SSW05200142620814SW014814200148438WSW0000000W0000000WNW0000000NW 000002,7432,743NNW000001,3321,332TOTAL1,219 3611,2063362,0727,85313,047 2.1-26GEOGRAPHY AND DEMOGRAPHY WATTS BARWBNP-94Table 2.1-20 Watts Bar 2050 Estimated Peak Recreation VisitationWithin 10 Miles Of The Site(Sheet 1 of 1)DistanceMilesDirection0-11-22-33-44-55-100-10N 6210248000869NNE179024101728691,461NE172024801,7242,3474,491ENE17217240016616601,076E 0000000ESE0000000SE 0000000SSE0000000S 1590019300352SSW05500152662869SW015915200159470WSW0000000W0000000WNW0000000NW 000002,9312,931NNW000001,4231,423TOTAL1,303 3861,2893592,2148,39113,942 GEOGRAPHY AND DEMOGRAPHY 2.1-27WATTS BARWBNP-94Table 2.1-21 Watts Bar 2060 Estimated Peak Recreation VisitationWithin 10 Miles Of The Site(Sheet 1 of 1)DistanceMilesDirection0-11-22-33-44-55-100-10N 6610264000925NNE191025701849261,558NE184026401,8372,5014,786ENE18418442617617601,146E 0000000ESE0000000SE 0000000SSE0000000S 1690020600375SSW05900162705926SW016916200169500WSW0000000W0000000WNW0000000NW 000003,1223,122NNW000001,5161,516TOTAL1,389 4121,3733822,3598,93914,854 GEOGRAPHY AND DEMOGRAPHY 2.1-28WATTS BARWBNP-94Table 2.1-22 School EnrollmentsWithin 10 Miles ofWatts Bar Nuclear PlantEnrollmentSchool Name Location2008201020202030204020502060 Meigs South ElementaryS 5-10418442565691784892999Meigs North ElementaryS 5-104374635917728209321045Meigs MiddleS 5-10399422539659748851954 Meigs County HighS 5-10534565722882100111391276Rhea County HighWSW 5-101,4051,4341,5891758187220142156Spring City ElementaryNW 5-10633646716792843907971 Spring City MiddleNW 5-10309315349387412443474Evensville CenterWSW 5-1020202325272931Total4,1554,3075,0945,9166,5077,2077,906 GEOGRAPHY AND DEMOGRAPHY2.1-29WATTS BAR WBNP-83Figure 2.1-1 Location of Watts Bar Nuclear Plant Site

2.1-30GEOGRAPHY AND DEMOGRAPHYWATTS BAR WBNP-50Figure 2.1-2 Watts Bar Site Location 0-50 Miles GEOGRAPHY AND DEMOGRAPHY2.1-31WATTS BAR WBNP-50Figure 2.1-3 Watts Bar Site Location 0-10 Miles 2.1-32GEOGRAPHY AND DEMOGRAPHYWATTS BAR WBNP-72Figure 2.1-4a Watts Bar Topographic Map & Reservation Boundary GEOGRAPHY AND DEMOGRAPHY2.1-33WATTS BAR WBNP-72Figure 2.1-4b Site Boundary / Exclusion Area Boundary 2.1-34GEOGRAPHY AND DEMOGRAPHYWATTS BAR WBNP-72Figure 2.1-5 Main Plant General Plan GEOGRAPHY AND DEMOGRAPHY2.1-35WATTS BAR WBNP-63Figure 2.1-6 Deleted by Amendment 63 2.1-36GEOGRAPHY AND DEMOGRAPHYWATTS BAR WBNP-63Figure 2.1-7 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY2.1-37WATTS BAR WBNP-63Figure 2.1-8 Deleted by Amendment 63 2.1-38GEOGRAPHY AND DEMOGRAPHYWATTS BAR WBNP-63Figure 2.1-9 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY2.1-39WATTS BAR WBNP-63Figure 2.1-10 Deleted by Amendment 63 2.1-40GEOGRAPHY AND DEMOGRAPHYWATTS BAR WBNP-63Figure 2.1-11 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY2.1-41WATTS BAR WBNP-63Figure 2.1-12 Deleted by Amendment 63 2.1-42GEOGRAPHY AND DEMOGRAPHYWATTS BAR WBNP-63Figure 2.1-13 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY2.1-43WATTS BAR WBNP-63Figure 2.1-14 Deleted by Amendment 63 2.1-44GEOGRAPHY AND DEMOGRAPHYWATTS BAR WBNP-63Figure 2.1-15 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY2.1-45WATTS BAR WBNP-63Figure 2.1-16 Deleted by Amendment 63 2.1-46GEOGRAPHY AND DEMOGRAPHYWATTS BAR WBNP-63Figure 2.1-17 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY2.1-47WATTS BAR WBNP-63Figure 2.1-18 Deleted by Amendment 63 2.1-48GEOGRAPHY AND DEMOGRAPHYWATTS BAR WBNP-63Figure 2.1-19 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY2.1-49WATTS BAR WBNP-94Figure 2.1-20 2010 Cumulative Population Within 30 Miles/ 500 persons per Square Mile 2010 Cumulative Population Within 30 Miles/500 persons Square Mile 10 100 1000 10000 100000 1000000 1000000015102030 Miles Population 500/Sq 2010WATTS BAR NUCLEAR PLANT FINAL SAFETY WITHIN 30 MILES OF THE SITEANALYSIS REPORTFIGURE 2.1-202010 CUMULATIVE POPULATION 2.1-50GEOGRAPHY AND DEMOGRAPHYWATTS BAR WBNP-94Figure 2.1-21 2060 Cumulative Population Within 30 Miles/ 1000 persons per Square Mile 2060 Cumulative Population Within 30 Miles/1000 persons Square Mile 10 100 1000 10000 100000 1000000 1000000015102030 Miles Population 1000/Sq 2060WATTS BAR NUCLEAR PLANT FINAL SAFETY ANALYSIS REPORT2060 CUMULATIVE POPULATION WITHIN 30 MILES OF THE SITEFIGURE 2.1-21 NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES 2.2-1WATTS BARWBNP-942.2 NEARBY INDUSTRIAL, TRANSPOR TATION, AND MILITARY FACILITIES2.2.1 Location and RouteMaps showing the area are found on Figures 2.1-2 and 2.1-3. The only significant nearby industrial facility is the Watts Bar Steam Plant.The nearest land transportation route is State Route 68, about one mile north of the Site. The Tennessee River is navigable past the site.A main line of the CNO&TP (Norfolk Southern Corporation) is located approximately 7 miles west of the site. A TVA railroad spur track connects with this main line and serves the Watts Bar Steam Plant and Watts Bar Nuclear Plant. The spur has fallen into disuse and would need to be repaired prior to use.No other significant industrial land use, military facilities, or transportation routes are in the vicinity of the nuclear plant.

2.2.2 Descriptions 2.2.2.1 Description of FacilitiesThe Watts Bar Steam Plant is a coal-fired electric generating facility with a total capacity of 240,000 kW which during normal operation has about 100 employees. The plant is not currently operating, but could be reactivated in the future.The Tennessee River is a major barge route in which a 9-foot navigation channel is maintained.2.2.2.2 Description of Products and MaterialsTable 2.2-1 shows the total amount of certain hazardous materials shipped past the Watts Bar Nuclear Plant from 2002 to 2007 on a yearly basis. Total traffic past the site was 670,716 tons in 2008 compared to 1,294,959 tons in 1990 and to 760,000 tons in 1975. Traffic on the TVA railroad spur consisted of heavy components for the nuclear plant. If Watts Bar Steam Plant were reactivated, the spur would also be used for the delivery of heavy components and coal to it.

2.2.2.3 PipelinesNo pipelines carrying petroleum products are located in the vicinity of the nuclear plant.

2.2.2.4 WaterwaysThe Watts Bar Nuclear Plant site is located on a 9-foot navigable channel on Chickamauga Reservoir. Its intake structure is located approximately two miles downstream of Watts Bar Lock and Dam. Watts Bar lock is located on the left bank of the Tennessee River with dimensions of 60' wide x 360' long. Towboat sizes vary from 1500 to 1800 horsepower for this section of the Tennessee River (Chattanooga to

2.2-2NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES WATTS BARWBNP-94Knoxville). The most common type barge using the water way is the 35'x 195' jumbo barge with 1,500 ton capacity. There were also numerous liquid cargo (tank) barges of varying size with capacity to 3,000 tons.

2.2.2.5 Airports No airports are located within 10 miles of the site. Mark Anton airport is the nearest, 11 to 12 miles southwest of the site. Its longest runway is 4,500 feet and is hard surfaced. It has no commercial facilities. Lovell Field about 45 miles south-southwest is the nearest airfield with commercial facilities. The annual number of movements per year is about 62,000 for Lovell Field and about 4,000 at Mark Anton of which 1,300 are student pilots executing "touch and go's".Figures 2.2-1 and 2.2-2 show the plant in relation to civilian and military airways, respectively. Traffic on airway V51 totals fewer than 2,000 flights per year based on 2008 data.2.2.2.6 Projections of Industrial GrowthWithin five miles of the Watts Bar Nuclear Plant are two major potential industrial sites. Three-to-five miles southwest of the plant is a 3,000 acre tract and about 3 miles north is a 200 acre tract. The 3,000 acre site is currently under the ownership of the Mead Corporation. A site impact analysis for the possible development of a paper plant has been performed on the site. However, the Mead Corporation has withdrawn its application to build the plant and there are no immediate or future plans for development. The 200 acre tract is still undeveloped and there are no immediate or future plans for development of the site.2.2.3 Evaluation of Potential AccidentsNone of the activities being performed in the vicinity of the site are considered to be a potential hazard to the plant.A study of the products and materials transported past the site by barge reveals that no potential explosion hazard exists. The worst potential condition for onsite essential safety features other than the intake pumping station arising from an accident involving the products transported near the site (coal, fuel oil, asphalt, tar and pitches) would be the generation of smoke by the burning of these products. The hazard to the Main Control Room from the generation of smoke from these products is covered in Section 6.4.4.2.Gasoline supply to Knoxville is via pipeline. As specified in Section 2.2.2.3, this pipeline is not in the vacinity of the Watts Bar Nuclear Plant. As of 1974, with the pipeline in full operation, no future gasoline barge shipments past the Watts Bar Nuclear Plant site are expected. The potential for damage to the Watts Bar Nuclear Plant from a gasoline barge explosion is therefore negligible.Fuel oil is shipped by barge past the Watts Bar Nuclear Plant Site. In case of a fuel oil barge accident, fire and dense smoke may result. Neither fire or dense smoke will effect plant safety, however.

NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES 2.2-3WATTS BARWBNP-83The intake pumping station is protected against fire by virtue of design and location. Pump suction is taken from the bottom of the channel. All pumps and essential cables and instruments are protected from fire by being enclosed within concrete walls. Also, the embayment is just downstream of the Watts Bar Dam, which is locked on the opposite side of the Tennessee River. Consequently, any oil released to the river would be swept by the current past the embayment that leads to the intake pumping station due to the fact that the embayment is located on the inside of a bend in the Tennessee River.Even if fuel oil from a spill should enter the embayment and reach the intake pumping station, the oil would have no significant effect on the water intake system or the systems it serves. Entry of oil in the intake is unlikely since the oil will float on water.

A concrete skimmer wall exists at the pumping station and the pumps take suction approximately 20 feet below the minimum normal water level. The pump suction would be approximately 10 feet below the water surface even in the event of failure of the downstream dam. Any oil that did enter the pumps would be highly diluted and in such a state would have a minor effect on system piping losses and heat exchanger capabilities.

2.2.

3.1 REFERENCES

None.

2.2-4NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES WATTS BARWBNP-94Table 2.2-1 Waterborne Hazardous Material Traffic (Tons)

(U.S. Army Corps of Engineers)2002-2007 Sheet 1 of 1)COMMODITIES200220032004200520062007Ammonium Nitrate Fertilizers3110 Carbon (Including Carbon Black), NEC15232760513481518 Ethyl Alcohol (Not Denatured) 80% or More Alcohol137147118594137464133412769938947Fuel Oils, NEC34007209Lubrication Petroleum Oils from Petrol &

Bitum Min12732Other Light Oils from Petroleum & Bitum Minerals9120Petro.Bitumen, Petro.Coke, Asphalt, Butumen mixes NEC1531127082518311437314871061Petroleum Oils/Oils from Bituminous Minerals, Crude6674Pitch & Pitch Coke from Coal Tar/Oth Mineral Tars248986258584236716254001235381164752Vermiculite, Perlite, Chlorites16421643Grand Total402896397491408863419774317165261089 NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES 2.2-5WATTS BARWBNP-94Table 2.2-2 Deleted by Amendment 94 2.2-6NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES WATTS BARWBNP-94 NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES 2.2-7WATTS BAR WBNP-63Security-Related Information - Withheld Under 10CFR2.390Figure 2.2-1 Airways in the Area of the Plant

NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES 2.2-8WATTS BAR WBNP-63Security-Related Information - Withheld Under 10CFR2.390Figure 2.2-2 Military Airways in the Area of the Plant METEOROLOGY 2.3-1WATTS BARWBNP-922.3 METEOROLOGY 2.3.1 Regional Climate2.3.1.1 Data SourcesMost of the climatic data summaries and other publications used in describing the site region meteorology are included in the list of references for Section 2.3. Those used in a general way not specifically referenced are the following: (1) U.S. Department of Commerce, Normal Weather Charts for the Northern Hemisphere, U. S. Weather Bureau, Technical Paper No. 21, October 1952, and (2) U.S. Department of Commerce, Climatic Atlas of the United States, Environmental Science Services Administration, Environmental Data Service, June 1968.

2.3.1.2 General ClimateThe Watts Bar site is in the eastern Tennessee portion of the southern Appalachian region. This area is dominated much of the year by the Azores-Bermuda anticyclonic circulation shown in the annual normal sea level pressure distribution (Figure 2.3-1).[1] This dominance is most pronounced in late summer and early fall and is accompanied by extended periods of fair weather and widespread atmospheric stagnation.

[2] In winter and early spring, the normal circulation becomes diffuse over the region as eastward moving migratory high- or low-pressure systems, identified with the mid-latitude westerly upper air circulation, bring alternately cold and warm air masses into the Watts Bar site area with resultant changes in wind, atmospheric stability, precipitation, and other meteorological elements. In the summer and early fall, the migratory systems are less frequent and less intense. Frequent incursions of warm, moist air from the Gulf of Mexico and occasionally from the Atlantic Ocean are experienced in the summer.The site is primarily influenced by cyclones from the Southwest and Gulf Coast that translate toward the Northeast U.S. Coast by passing along either the west side or the east side of the Appalachian chain and by cyclones from the Plains or Midwest that move up the Ohio Valley. Topography around the site strongly influences the local climate. Mountain ranges located both northwest and southeast of the site, which is in the upper Tennessee River Valley, are oriented generally northeast-southwest and rise 3,000 to 4,000 feet MSL and, in places, 5,000 to 6,000 feet MSL. The latter elevations are in the Great Smoky Mountains to the east and southeast. They provide an orographic barrier that reduces the low-level atmospheric moisture from the Atlantic Ocean brought into the area by winds from the East. However, considerable low-level atmospheric moisture from the Gulf of Mexico is often brought into the area by winds from the south, southwest, or west.The predominant air masses affecting the site area may be described as interchangeably continental and maritime in the winter and spring, maritime in the summer, and continental in the fall. Temperature patterns generally conform to the seasonal trends typical of continental, humid subtropical climates. Precipitation is normally well distributed throughout the year, but monthly amounts are generally

2.3-2METEOROLOGY WATTS BARWBNP-94largest in the winter and early spring and smallest in the late summer and fall. The primary maximum occurs in March and is associated with cyclones passing through or near the region. A secondary maximum of precipitation occurs in July and is characteristically the result of diurnal thunderstorms occurring most frequently in the afternoon and evening. The minimum monthly precipitation normally occurs in October. Snow and sleet usually occur only during the period November through March and generally result from cold air pushing southward through the area against relatively warm, moist air.

2.3.1.3 Severe WeatherSevere storms are relatively infrequent in east Tennessee, being east of the area of major tornadic activity, south of nearly all storms producing blizzard conditions, and too far inland to be affected often by the remnants of intense tropical cyclones. Damage from such remnants of tropical cyclones is rare, occurring only about once every 18 years, and is generally restricted to flood effects from heavy rains.[3] The probability that a tornado will strike the Watts Bar site is quite low. During a period of 92 years, 1916-2008, one tornado was reported in Rhea County, in which the plant site is located. [4,5,6] This tornado occurred west and northwest of the plant site on June 4, 1983. It had a southwest to northeast track about 20 miles long with an average width of 50 yards, and it ended west of the Tennessee River just northeast of Spring City. Tornadoes in the eastern Tennessee area usually move northeastward and cover an average surface path five miles long and 100 yards wide.[7] Using the principle of geometric probability described by H. C. S. Thom, [8] the probability of a tornado striking any point in the one degree latitude by one degree longitude square containing the plant site may be calculated. Thom's equations are the following:P = mean probability of a tornado striking a point in any year in a one-degree square. = mean path area of a tornado (mi 2)t = mean number of tornadoes per year.A = area of one-degree latitude, one-degree longitude square (mi 2), which is 3887 mi 2 for the one-degree square containing the Watts Bar site.R = mean recurrence interval for a tornado striking a point in the one- degree square.

P zt A-----=(1)R 1 P----=(2)Z METEOROLOGY 2.3-3WATTS BARWBNP-94For the baseline approach used by the Nuclear Regulatory Commission, Thom's z = 2.8209 mi 2 and a = 0.46 tornado per year[9] give a probability of 3.34 x 10

-4 and a recurrence interval of about once in 3,000 years. However, the average tornado path area of 0.2841 mi 2 (5 miles by 100 yards) for eastern Tennessee reduces the probability to 3.36 x 10

-5 and the recurrence interval to about once in 30,000 years. An updated set of tornado probability statistics was obtained from the National Severe Storms Forecast Center in November 1987.

[10] The calculations were based on tornadoes that occurred during 1950-1986 in a 30-nautical mile (nm) radius area centered at the onsite meteorological tower. A circle with a 30 nm radius has an area about the same as a one-degree latitude-longitude square. Based on 27 tornado occurrences in the 37-year period, the annual return probability is 1.48 x 10

-4 and the mean return interval is 6,755 years for any point in the circle. The annual occurrence frequency in the circle was 0.73. The June 4, 1983 tornado had the longest track of the 27 with a path length of 21 miles, rounded to the nearest mile. For consideration in station blackout criteria, the annual expectation of tornadoes with winds exceeding 113 mph is 9.38 x 10

-5 per square mile. Windstorms are relatively infrequent, but may occur several times a year.[7] The fastest mile of wind recorded in 13 years (1995-2008) at the Chattanooga airport NWS station was 54 mph in March 1997.

[11]The fastest mile of wind recorded at the Knoxville airport NWS station during a 13-year period (1995-2008) was 76 mph in April 1996.

[12 ]Moderate and occasionally strong winds sometimes accompany migrating cyclones and air mass fronts. The strong winds are usually associated with lines of thunderstorms along or ahead of cold fronts and are more probable in the late winter and spring than any other time of the year. Brief, strong gusts of wind due to downdraft and outflow from individual thunderstorms can occur, but are generally limited to the large, intense thunderstorms that develop in the spring and summer. During the period 1955-1967, winds > 50 knots (> 57 mph) were reported only three or four times per year in the one-degree square containing the site.[9]Hail 3/4 inch in diameter or larger has been reported only 15 times in a 13-year period (1955-1967) in the one-degree square containing the Watts Bar site.[9] For a 52-year record (1879-1930) at Chattanooga and a 60-year record (1871-1930) at Knoxville, the average number of days with hail (any size) was less than one per year.

[13]Annual and seasonal densities of lightning flashes to ground may be estimated by using a monthly flash density equation

[14] and thunderstorm day statistics. For thunderstorm day frequencies observed at Chattanooga (Table 2.3-1) and a latitude of 35°, the annual and seasonal densities of flashes to ground per km 2 are estimated to be the following: 3.17 (annual), 0.14 (winter), 0.64 (spring), 2.19 (summer), and 0.21 (fall).Relative potential for air pollution is indicated by the seasonal distribution of atmospheric stagnation cases of four days or more analyzed by Korshover.[15]In a 35-year period (1936-1970), there were about one case in the winter, 11 cases in the spring, 24 cases in the summer, and 34 cases in the fall. According to Holzworth

[16] there were about 35 forecast-days of high meteorological potential for air pollution in a 5-year period based on data collected in the 1960s and early 1970 (Figure 2.3-2). On t

2.3-4METEOROLOGY WATTS BARWBNP-94the average, about seven air pollution forecast-days per year can be expected, with significantly greater probability in the summer and fall than in the winter and spring. Frost penetration depth is important for protection of water lines and other buried structural features that are subject to freeze damage. The average depth for the 1899 through 1938 period was about six inches, and the extreme depth during the 1909 through 1939 period was about 14 inches.[17]Estimations of regional glaze probabilities have been made by Tattelman, et al.

[18] For Region V, which contains Tennessee, point probabilities for glaze icing 5.0 cm or more thick and 2.5 cm or more thick in any one year are about 1.0 x 10

-4 and 4.0 x 10

-4 , respectively. These probabilities correspond to recurrences of about once in 10,000 years and about once in 2,500 years. Ice thicknesses of 2.0, 1.8, 1.7, and 1.5 cm correspond to return periods of 100, 50, 25, and 10 years.All ice storms with glaze thicknesses 2.5 cm or greater that were analyzed were accompanied by maximum wind gusts 10 m/sec or greater. However, only one had maximum gusts 20 m/sec or greater, and that storm had ice thicknesses less than 5.0 cm.The point probabilities for lesser ice thicknesses are about 0.20 for > 1.25 cm and 0.37 for > 0.63 cm, and the respective recurrence intervals are once in five years and once in three years. However, glaze ice thicknesses 1.25 cm or less generally result in little structural damage, except for above-ground utility wires when strong winds are combined with the storms. The major impact of storms which produce these lesser ice thicknesses is a hazard to travel in the affected areas.Snowfall records for Chattanooga (1937-2008) and Knoxville (1951-2008) show maximum 24-hour and single storm amounts of 20 and 47 inches, and 18.2 and 15 inches, respectively.[11,12,19] The weight of the 100-year return period snow pack in the Watts Bar site area is estimated to be about 14 pounds per square foot.

[20]Assuming that the 22.5 inches of snow that fell at Knoxville on December 4-6, 1886, had the water equivalency ratio of 1:7, or 0.14 inch per inch of snow, the weight would be about 17 pounds per square foot. The sum of these values would be about 31 pounds per square foot on a flat surface. The same assumptions for the Chattanooga single storm maximum of 14.5 inches (December 4-6, 1886) yield about 11 pounds per square foot for a sum of about 25 pounds per square foot. For conservatism, the weight of the maximum single storm snowfall recorded in Tennessee during the 1871 through 1970 period was estimated. This 28-inch snowfall occurred on February 19-21, 1960 at Westbourne, on the Cumberland Plateau in northeastern Tennessee.

[21] A more conservative water equivalency ratio of 1:6 was used to give an estimated weight of about 24 pounds per square foot. The total snow load for this case would be about 38 pounds per square foot. Design loading considerations, including the snow load, for the reactor shield building and other Category I structures are presented in Sections 3.8.1 and 3.8.4, respectively.No meteorological parameters were used in evaluating the performance of the ultimate heat sink, which consists of a once-through cooling system utilizing the Chickamauga METEOROLOGY 2.3-5WATTS BARWBNP-94Reservoir on the Tennessee River. A demonstration of adequate water flow past the site is used in the design bases. This is discussed in Section 2.4.11.The site is located in Region I for Design Basis Tornado considerations. The design conditions assumed for the Watts Bar Nuclear Plant reactor shield building (and other safety-related structures) are the following:For the additional Diesel Generator Building and structures initiated after July 1979, the design basis tornado parameters are as follows:These and tornado-driven missile criteria are discussed in Sections 3.3 and 3.5. The fastest mile of wind at 30 feet above ground is about 95 mph for a 100-year return period in the site area.

[22] The vertical distribution of horizontal wind speeds at 50, 100, and 150 feet above ground is 102, 113, and 120 mph on the basis of the speed at 30 feet and a power law exponent of 1/7. A gust factor of 1.3 is often used at the 30-foot level, but this would be conservative for higher levels. The wind load for the Shield Building is based on 95 mph for that level, as discussed in Section 3.3. Estimates of the probable maximum precipitation (PMP) and the design considerations for the PMP are discussed in Section 2.4. 2.3.2 Local Meteorology2.3.2.1 Data SourcesShort-term site-specific meteorological data from the TVA meteorological facility at the Watts Bar Nuclear Plant site are the basis for dispersion meteorology analysis. Data representative of the site or indicative of site conditions for temperature, precipitation, snowfall, humidity, fog, or wind were also obtained from climatological records for Chattanooga, Dayton, Knoxville, Oak Ridge, and Watts Bar Dam, all in Tennessee. Short-term records for the Sequoyah Nuclear Plant site were used. These data source locations are shown relative to the plant site in Figure 2.3-3.(1)300 mph=Rotational Speed(2)60 mph=Translational Speed(3)360 mph=

Maximum Wind Speed(4)3 psi=Pressure Drop(5)1psi/sec=Rate of Pressure Drop (3 psi/3 sec is assumed)(1)290 mph=Rotational Speed (2)70 mph=Translational Speed(3)360 mph=

Maximum Wind Speed(4)3 psi=Pressure Drop(5)2 psi/sec=Rate of Pressure Drop (3 psi/1.5 sec is assumed) 2.3-6METEOROLOGY WATTS BARWBNP-94 2.3.2.2 Normal and Extreme Values of Mete orological ParametersTemperature data for Dayton [13] and for Chattanooga

[11] are presented in Tables 2.3-2 and 2.3-3, respectively. The Chattanooga and Dayton data are provided as reasonably representative and recent (1971-2000) temperature information. Mean temperatures have ranged from the low 40s in the winter to the upper 70's in the summer at both locations. Mean maxima ranged from about 50°F in mid winter to about 90°F in midsummer. The mean minima ranged from about 24°F for both locations to about 74°F for Dayton and 75°F for Chattanooga. The extreme maxima recorded for the respective data periods were 107°F at Decatur and 106°F at Chattanooga, while the extreme minima recorded were -15°F and -10°F, respectively.Precipitation data for Watts Bar Dam

[23] are presented in Table 2.3-4. Rain or snow has fallen on an average of 110 days per year, and the annual average precipitation for 1941 through 1970 was nearly 53 inches. The maximum monthly rainfall has ranged from about seven inches to nearly 15 inches. The minimum monthly amount for September 1939 through September 1989 was zero. The maximum in 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> was 5.3 inches on January 6-7, 1946. Mean monthly data reveal the wettest period as late fall through early spring, with March normally the wettest month of the year. The data show a secondary peak of rainfall in July. Thunderstorm activity is most predominant in the spring and summer seasons, and the maximum frequency of thunderstorm days (Table 2.3-1) is normally in July.Appreciable snowfall is relatively infrequent in the area. Snowfall data are summarized in Table 2.3-5 for Dayton

[13] and in Table 2.3-6 for Chattanooga

[11] and Knoxville.

[12] The Dayton, Chattanooga and Knoxville records provide current information and offer a complete picture of the pattern of snowfall in the Tennessee River Valley from Chattanooga to Knoxville. Mean annual snowfall has ranged from 4.8 inches at Chattanooga to about 10 inches at Knoxville. Dayton, about halfway between those locations, averaged about 4 inches annually for an earlier period of record. Generally, significant snowfalls are limited to November through March. For the data periods presented in the tables, respective 24-hour maximum snowfalls have been 18.5, 8, and 11.1 inches at Chattanooga, Dayton, and Knoxville. Severe ice storms of freezing rain (or glaze) are infrequent, as discussed in the regional climatology section.Atmospheric water vapor content is generally rather high in the site area, as was indicated in the discussion of the regional climatology. Long-term relative humidity and absolute humidity data for Chattanooga are presented in Tables 2.3-7 through 2.3-9.[11,25] Short-term humidity data based on measurements at the onsite meteorological facility are summarized in Tables 2.3-10 and 2.3-11 for comparison with the data in Tables 2.3-8 and 2.3-9. A typical diurnal variation is apparent in Table 2.3-7. Relative humidity and absolute humidity are normally greatest in the summer.Fog data for Chattanooga,[11] Knoxville,[12] and Oak Ridge,[26] Tennessee, and from Hardwick [27] are presented in Table 2.3-12. These data indicate that heavy fog at the Watts Bar site likely occurs on about 35 days per year with the fall normally the foggiest season. Sources of data on fogs with visibilities significantly less than 1/4 mile and on durations of fogs which can be considered representative of the site have not been

identified.

METEOROLOGY 2.3-7WATTS BARWBNP-92Wind direction patterns are strongly influenced by the northeast-southwest orientation of the major topographic features, as evidenced in the onsite data, Sequoyah Nuclear Plant data

[28], and the records for Knoxville

[12] and Oak Ridge.

[26] The Watts Bar wind direction and wind speed data are summarized in Tables 2.3-13 and 2.3-14 (annual at 10 and 46 meters); Tables 2.3-15 and 2.3-16 (directional persistence at 10 and 46 meters); and Tables 2.3-17 through 2.3-40 (monthly at 10 and 46 meters). The annual wind roses for each level are shown in Figures 2.3-4 and 2.3-5.The most frequent wind direction at 10 meters has been from south-southwest (about 16%). The next highest frequencies (about 8%) are from the north-northeast and northwest wind. The data in Table 2.3-41 and the data in Table 2.3-13 show a predominance of wind from the north-northwest and northwest, respectively, for wind speeds less than about 3.5 mph. More discussion of this very light wind speed pattern is contained in Section 2.3.3.3. It is very significant that the frequencies of calms differ so markedly between the two sets of onsite data. It appears that the higher frequency of calm conditions is primarily a consequence of the location of the temporary meteorological facility in a "sink." The maximum wind direction persistence period at 10 meters is shown in Table 2.3-15 as 44 hours5.092593e-4 days <br />0.0122 hours <br />7.275132e-5 weeks <br />1.6742e-5 months <br /> from the south-southwest direction. The monthly summaries show some minor variation in the wind direction patterns, but the upvalley-downvalley primary and secondary frequency maxima generally are fully evident.In the summary tables for 46 meters, the upvalley-downvalley wind direction pattern is very clear and dominant. The two highest frequencies are 19% from the south-southwest wind direction and 11% from the north-northeast wind direction. The maximum wind direction persistence (Table 2.3-16) during the 17-year period was 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> from the south-southwest.Wind speed is normally lower than for most parts of the United States. The other data sources referenced in the discussion of wind direction patterns also reflect this condition. Annually, the onsite data show about 53% of the hourly average wind speeds at 10 meters were less than 3.5 mph and about 85% were less than 7.5 mph.

At 46 meters, the respective frequencies show the wind speeds are relatively lighter in summer and early fall and relatively stronger in late fall, winter, and spring.Mean mixing height data for the United States have been researched by Holzworth.

[16] However, his analysis has utilized data to estimate morning mixing heights (after sunrise) and mid afternoon mixing heights. Night-time mixing heights are not addressed. Average daily mixing heights are likely to be reasonably similar to the mean morning mixing heights. The seasonal and annual estimates of these mixing heights are the following: winter, about 500 meters; spring, about 530 meters; summer, about 430 meters; fall, about 350 meters; and annual, about 450 meters.Low-level inversion frequencies in the eastern Tennessee area have been studied by Hosler.[29] His seasonal frequencies indicate inversions in the Watts Bar area about 40% of the time in winter, 30% in spring, 45% in summer, and 45% in fall. The annual frequency is about 40%. The monthly and annual percent frequencies of hours with inversions measured at the Watts Bar onsite meteorological facility for the 20-year 2.3-8METEOROLOGY WATTS BARWBNP-92period, 1974 through 1993, are presented in Table 2.3-42. In comparison to Hosler's seasonal and annual values, the winter, summer, and fall values are slightly lower and the spring value is higher and has the greatest departure. The highest monthly frequency in Table 2.3-42 is about 44% in October and the lowest is about 31% in January, with an annual average of about 39%. Monthly and annual frequencies of Pasquill stability classes A-G are also presented in the same table and indicate that the most stable time of year is the fall. Korshover's statistics on atmospheric stagnation cases

[15] discussed under "General Climate," provide the same indication.Table 2.3-44 presents a summary of onsite inversion persistence data, with a breakdown by stability class, for the same 20-year period discussed above. Persistence in this case is defined as two or more consecutive hours with vertical temperature gradient (T) values > 0 degrees Celsius. However, the individual classes are allowed one-hour departures among themselves. The data analyzed correspond to the T interval between 10 and 46 meters above the ground. The longest periods of inversion were 45 hours5.208333e-4 days <br />0.0125 hours <br />7.440476e-5 weeks <br />1.71225e-5 months <br /> in January 1982 and 42 hours4.861111e-4 days <br />0.0117 hours <br />6.944444e-5 weeks <br />1.5981e-5 months <br /> in December 1989. Other long periods, up to 21 hours2.430556e-4 days <br />0.00583 hours <br />3.472222e-5 weeks <br />7.9905e-6 months <br />, occurred in winter. A combination of cold, dry air masses with the shorter length of the solar day in that half of the year and fresh snow on the ground surface can increase the probability for inversion durations greater than 14 hours1.62037e-4 days <br />0.00389 hours <br />2.314815e-5 weeks <br />5.327e-6 months <br /> in that time of year. The unusual case of 45 hours5.208333e-4 days <br />0.0125 hours <br />7.440476e-5 weeks <br />1.71225e-5 months <br /> of inversion persistence at this site occurred from January 19 to 21, 1982 at the end of a 10-day period of very cold weather. Persistent fog and low overcast with a synoptic pattern of warm air advection above an initially frozen, snow-covered ground surface and very light, variable winds at the 10-meter level created this condition.[30,31,32] The unusual case of 42 hours4.861111e-4 days <br />0.0117 hours <br />6.944444e-5 weeks <br />1.5981e-5 months <br /> of inversion persistence occurred from December 29-31, 1989 during a period in which a cold front stalled to the west of the site. All of Eastern Tennessee (including the Watts Bar site) was covered by heavy fog with occasional light rain and drizzle.[33, 34, 35]Distributions of stability classes A-G are presented in Figures 2.3-6A and 2.3-6B. The average diurnal variations of stability class frequencies are quite evident, with the neutral (class D) and unstable (A, B, and C) lapse conditions predominant in the daytime and the stable classes (E, F, and G) predominant through the nighttime.2.3.2.3 Potential Influence of the Plant and Its Fac ilities on Local MeteorologyThe Watts Bar site is about 45 miles north-northeast of Chattanooga. It is located on the west shore of Chickamauga Lake on the Tennessee River, which flows generally southwesterly through eastern Tennessee. The site (about 700 feet MSL) is near the center of a northeast-southwest aligned valley, 10 to 15 miles wide, flanked to the west by Walden Ridge (900 to 1,800 feet MSL,) and to the east by a series of ridges reaching elevations of 800 to 1,000 feet MSL. Figure 2.1-3 consists of a map of the topographic features (as modified by the plant) of the site area for 10 miles in all directions from the plant. Profiles of maximum elevation versus distance from the center of the plant are shown in Figures 2.3-14 through 2.3-29 for the sixteen compass point sectors (keyed to true north) to a radial distance of 10 miles.The only plant systems which may have any pragmatic effects on the local climatic patterns of meteorological parameters discussed in the preceding section are the two METEOROLOGY 2.3-9WATTS BARWBNP-92natural draft cooling towers and their blowdown discharge system. During their operation, some small increase in ambient atmospheric moisture and temperature can be expected from the vapor plumes discharged from the tower tops. Also, some increase in the surface water temperature of Chickamauga Lake will be associated with the discharge of heated water from the plant (primarily the cooling tower blowdown). The vapor plumes may produce some additional localized fog on rare occasions on top of Walden Ridge (about eight miles, at its closest point, to the west-northwest). The increased lake surface temperature will likely increase the frequency of river steam fog slightly over a relatively small area of the reservoir downstream from the plant. No significant environmental impacts are expected from these effects. Discontinuities in ambient thermal structure of the atmosphere related to differential surface temperatures between land and water should produce no detectable effect on the local wind patterns or stability conditions. The physical plant structures will alter wind and stability somewhat in the immediate lee of the structures by mechanical turbulence factors produced in the building wake(s). However, these effects are expected to be generally insignificant beyond the first one or two thousand feet downwind.2.3.2.4 Local Meteorol ogical Conditions for D esign and Operating BasesAll design basis meteorological parameters are discussed or referenced in Section 2.3.1.3.2.3.3 Onsite Meteorological Measurements Program2.3.3.1 Preoperational ProgramOnsite meteorological facilities have been in operation since 1971 when a temporary 40-meter (130-foot) instrumented tower was installed. It was located about 760 meters (0.5 mile) west-southwest of the unit 1 Reactor Building and had a base elevation of 2 meters (8 feet) below plant grade. The temporary facility collected wind speed, wind direction, and temperature data at the 10-meter (33-foot) and 40-meter levels until it was decommissioned in September 1973. Since the FSAR dispersion meteorology data base was collected exclusively by the permanent facility, only that facility is described in detail in this section.Permanent Meteorological FacilityThe permanent meteorological facility consists of a 91-meter (300-foot) instrumented tower for wind and temperature measurements, a separate 10-meter (33-foot) tower for dewpoint measurements, a ground-based instrument for rainfall measurements, and an environmental data station (EDS), which houses the data processing and recording equipment. A system of lightning and surge protection circuitry and proper grounding is included in the facility design. This facility is located approximately 760 meters south-southwest of the Unit 1 Reactor Building and has a base elevation of 4 meters (11 feet) below plant grade.Data collected included: (1) wind direction and wind speed at 10, 46, and 91 meters; (2) temperature at 10, 46, and 91 meters; (3) dewpoint at 10 meters and (4) rainfall at 1 meter (3 feet). More exact measurement heights for the wind and temperature 2.3-10METEOROLOGY WATTS BARWBNP-92parameters are given in the EDS manual.

[37] Elsewhere in the text of this document, temperature and wind sensor heights are given as 10, 46, and 91 meters.Data collection at the permanent facility began May 23, 1973, with measurements of wind speed and wind direction at 10 and 93 meters (305 feet), temperature at 1, 10, 46, and 91 meters and dewpoint, and rainfall at 1 meter. Measurements of 46-meter wind speed and wind direction and 10-meter dewpoint began September 16, 1976. Measurements of 1-meter dew point were discontinued September 30, 1977. Wind Sensors at 93-meter (actual height was 93.3 meters) were moved to their present height on May 18, 1978. Measurements of 1-meter temperature were discontinued on April 2, 1981. The 10-meter dewpoint sensor was removed from the meteorological tower and a new dewpoint sensor was installed on a separate tower 24 meters to the northwest on April 11, 1994.Instrument Description A description of the meteorological sensors follows. More detailed sensor specifications are included in the EDS Manual. Replacement sensors, which may be of a different manufacturer or model, will satisfy the Regulatory Guide 1.23 (Revision

0) specifications.

[36]Data Acquisition SystemThe previous data collection system, which included a NOVA minicomputer, was replaced by a new system on March 2, 1989. This data acquisition system is located at the EDS and consists of meteorological sensors, a micro-VAX minicomputer (with appropriate peripherals). These devices send meteorological data to the plant and to the Central Emergency Control Center (CECC) and to a Remote Access Computer that enables callup for data validation and archiving.System AccuraciesSensor Height(Meters)DescriptionWind Direction and Wind Speed10, 46, and 91Ultrasonic wind sensor.Temperature10, 46, and 91Platinum wire resistance temperature detector (RTD) with aspirated radiation shield.Dewpoint10 Chilled-mirror dewpoint system.Rainfall1Tipping bucket rain gage.

METEOROLOGY 2.3-11WATTS BARWBNP-92The meteorological data collection system is designed and replacement components are chosen to meet or exceed specifications for accuracy identified in RG 1.23. The meteorological data collection system root-sum-squared (RSS) satisfies the RG 1.23 accuracy requirements. A detailed listing of error sources for each parameter is included in the EDS manual.Data Recording and DisplayThe data acquisition is under control of the computer program. The output of each meteorological sensor is scanned periodically, scaled, and the data values are stored.Meteorological sensor outputs are measured at the following rates: horizontal wind direction and wind speed, every five seconds (720 per hour); temperature and dewpoint, every minute (60 per hour); and rainfall, every hour (one per hour). Prior to February 1, 1975, only one reading of temperature and dewpoint was made each hour. Software data processing routines within the computer accumulate output and perform data calculations to generate 15-minute and hourly average of wind speed and temperature, 15-minute and hourly vector wind speed and direction, hourly average of dewpoint, hourly horizontal wind direction sigmas, and hourly total precipitation. Prior to February 11, 1987, a prevailing wind direction calculation method was used. Subsequently, vector wind speed and direction have been calculated along with arithmetic average wind speed.Selected data each 15 minutes and all data each hour are stored for remote data access. Data sent to the plant control room every minute includes 10-, 46-, and 91-meter values for wind direction, wind speed, and temperature. Data sent to the CECC computer in Chattanooga every 15 minutes includes 10-, 46-, and 91-meter wind direction, wind speed, and temperature values. These data are available from the CECC computer to other TVA and the State emergency centers in support of the Radiological Emergency Plan (REP), including the Technical Support Center at Watts Bar. Remote access of meteorological data by the NRC is available through the CECC computer.Data are sent from the EDS to an offsite computer for validation, reporting, and archiving.Equipment Servicing, Maintenance, and CalibrationThe meteorological equipment at the EDS is kept in proper operating condition by staff that are trained and qualified for the necessary tasks. Most equipment is calibrated or replaced at least every six months of service. The methods for maintaining a calibrated status for the components of the meteorological data collection system (sensors, recorders, electronics, DVM, data logger, etc) include field checks, field calibration, and/or replacement by a laboratory calibrated component. More frequent calibration and/or replacement intervals for individual components may be conducted, on the 2.3-12METEOROLOGY WATTS BARWBNP-92basis of the operational history of the component type. Detailed procedures are used and are referenced in the EDS Manual.

2.3.3.2 Operational Meteorological ProgramThe operational phase of the meteorological program includes those procedures and responsibilities related to activities beginning with the initial fuel loading and continuing through the life of the plant. This phase of the meteorological data collection program will be continuous without major interruptions. Operational system checks on the meteorological facility will be made once a week. The meteorological program has been developed to be consistent with the guidance given in RG 1.23 (Revision 0) and the reporting procedure in RG 1.21 (Revision 1).

[40] The basic objective is to maintain data collection performance to assure at least 90% joint recoverability and availability of data needed for assessing the relative concentrations and doses resulting from accidental or routine releases.The restoration of the data collection in the event of equipment failure or malfunction will be accomplished by replacement or repair of affected equipment. A stock of spare parts and equipment is maintained to minimize and shorten the periods of outages. Equipment malfunctions or outages are detected by maintenance personnel during routine or special checks. Equipment outages that affect the data transmitted to the plant can be detected by review of data displays in the reactor control room. Also, checks of data availability to the emergency centers are performed each work day. When an outage of one or more of the critical data items occurs, the appropriate maintenance personnel will be notified.In the event that the onsite meteorological facility is rendered inoperable, or there is an outage of the communication or data access systems; there is no fully representative offsite source of meteorological data for identification of atmospheric dispersion conditions. Therefore, TVA has prepared objective backup procedures to provide estimates for missing or garbled data. These procedures incorporate available onsite data (for a partial loss of data), offsite data, and conditional climatology. The CECC meteorologist will apply the appropriate backup procedures.

2.3.3.3 Onsite Data Summaries of Parameters fo r Dispersion MeteorologyAnnual joint frequency distributions of wind speed by wind direction for Pasquill atmospheric stability classes A-G, based on the onsite data for January 1974 through December 1993 are presented in Tables 2.3-45 through 2.3-52. These tables are summaries of hourly data for the wind at 10 meters and vertical temperature difference (T) between 10 and 46 meters (in the form of stability classes A-G). Tables 2.3-53 through 2.3-60 were prepared from the hourly data for the wind at 46 meters and T between 10 and 46 meters (as stability classes A-G) for January 1977 through December 1993. The frequency distributions in Tables 2.3-45 through 2.3-51 are also displayed in Figures 2.3-7 through 2.3-13.The upvalley-downvalley primary wind pattern at 46 meters exists for all seven stability classes. The 10-meter wind level also shows upvalley-downval ley wind direction patterns. However, for classes E-G, the flow patterns become progressively more METEOROLOGY 2.3-13WATTS BARWBNP-92diffuse, with peaks from the northwest which become primary maxima in classes F and G (Tables 2.3-50 and 2.3-51). These directional peaks for the stable classes are most pronounced in the lighter wind speed ranges. The combination of these very light winds with the more stable conditions near the earth's surface indicate that very poor atmospheric dispersion conditions for ground-level plant releases of air-borne effluent occur most frequently at night and with the northwest wind direction.The period of record for the joint frequency tables for the 46-meter wind measurement level is three years shorter than the record used for the 10-meter wind level. Collection of wind data at the 46-meter level began in September 1976. Tables 2.3-53 through 2.3-60 were originally prepared with 93-meter wind data and 10- to 91-meter T data for the July 1973-June 1975 period. The 46-meter wind level is near the height of the reactor building; and the 10- to 46-meter T interval is more representative than the 10- to 91-meter interval for stability classification, particularly for poorer dispersion conditions. The 10-meter wind level is applicable to design accident analysis and to semiannual reports on routine plant operations. The 46-meter wind level is used in radiological emergency dispersion and transport calculations.The 20-year period for the tables with 10-meter wind data and the 17-year period for the tables with 46-meter wind data reasonably represent long-term dispersion conditions at the site. The length of the record is an important factor, and patterns of unusually wet weather in the 1970s and unusually dry weather in the 1980s are included in this data base. The dispersion meteorology varied during the 20-year period, but the period is climatologically representative of long-term conditions. An increase in the frequency of 10-meter level calm winds (values less than 0.6 mi/hr) occurred in the early 1990s. The calm wind frequency increased from 1.6% for 1974-1988 to about 3.0% for 1974-1993. Consistent with the increase in calms, average wind speed decreased from 4.2 mi/hr for 1974-1988 to 4.1 mi/hr for 1974-1993.Potential climate change associated with a global warming of the earth's lower atmosphere may occur in the Watts Bar site area. Should that occur during the life of this nuclear plant, the dispersion meteorology will be evaluated for any significant changes and consequent impacts on plant design and operation.

2.3.4 Short-Term (Accident) Diffusion Estimates 2.3.4.1 ObjectiveRevised estimates of atmospheric diffusion expressed as dispersion factors (X/Q) have been calculated for accident releases considered as ground-level releases from the Watts Bar Nuclear Plant for specified time intervals and distances. The revised X/Q values are based on an updated onsite meteorological data base for 1974 through 1993 and RG 1.145 calculation methodology.

[41] The original FSAR calculations were based on data collected at the Watts Bar onsite meteorological facility for the period July 1, 1973 through June 30, 1975 and R.G. 1.4 methodology.

[42] All data used include wind direction and wind speed at 10 meters above ground and vertical temperature difference (T) between 10 and 46 meters above ground. The revised X/Q values at the exclusion area boundary and at the outer boundary of the low population zone (LPZ) were calculated as stated below.

2.3-14METEOROLOGY WATTS BARWBNP-92 Nomenclature for RG 1.145 MethodX/Q = centerline ground-level relative concentration (sec/m 3)y = lateral plume spread with meander and building wake effects (m), as a function of atmospheric stability, wind speed <<

10, and distance (for distances greater than 800 meters, y = (M-1) y 800 m + y). y = lateral plume spread as a function of atmospheric stability and distance (m). z = vertical plume spread as a function of atmospheric stability and distance (m).x = distance from effluent release point to point at which atmospheric dispersion factors (X/Q values) are computed (m). = mean hourly horizontal wind speed at 10 meters (m/sec)M = y correction factors for stability classes D, E, F, and G from Figure 3 in RG 1.145.A = minimum containment and Auxiliary Building cross-sectional area (m 2).Atmospheric dispersion factors (X/Q values) were calculated for a 1-hour averaging period and assumed to apply to the 2-hour period immediately following an accident. The following equations were used to determine these values:For stability classes D, E, F, or G and windspeeds less than 6 meters per second (m/s), the higher value from equations (1) and (2) was compared to the value from equation (3). The lower of these compared values was selected for the X/Q distributions. For wind speeds greater than 6 m/s in these classes and for all wind speeds in stability classes A, B, and C, the higher of the values from equations (1) and (2) was selected.The minimum cross-sectional area, A, for Watts Bar Nuclear plant is 1630 m

2. The exclusion boundary distance is 1200 m, as shown in Figure 2.1-4b. However, to avoid possible nonconservative accident X/Qs, the distance that was used to calculate the U 10 X Q 1 U 10 y z A 2+------------------------------------------------

=(1)XQ 1 U 10 3 y z----------------------------------

=(2)XQ 1 U 10 y z-------------------------

-=(3)

METEOROLOGY 2.3-15WATTS BARWBNP-94X/Qs is 1100 m, which is the minimum distance from the outer edge of the release zone to the exclusion area boundary. The assumed release zone is a 100-m radius circular envelope, which contains all of the structures that are potential sources of accidental releases of airborne radioactive materials. A distance of three miles (4828 m) was used as the low population zone (LPZ) outer boundary distance.The 1-hour X/Q values for the exclusion boundary distance were distributed in the downwind 22.5-degree compass-point sectors (plume sectors) based on wind direction. Calm wind speeds (less than 0.6 mi/hr) were distributed based on the wind direction frequencies for non-calm wind speeds less than 3.5 mi/hr. The 0.5th and 5th percentile values for each sector and for all sectors combined were identified. For the LPZ distance, the 0.5th percentile and 5th percentile 1-hour values for each sector, the annual average values for each sector, and the 0.5th and 5th percentile 1-hour values for all sectors combined were determined. The annual average X/Qs were calculated from hourly average data according to guidance in Regulatory Guide 1.111 for constant mean wind direction models.

[43] All calculations used an assumed wind speed of 0.6 mile per hour (0.268 m/s), which is the starting threshold of the anemometer, for hours with values less than that and thus defined as calms. Site-specific adjustment factors for terrain confinement and recirculation effects on concentrations at the LPZ distance were calculated and applied to the initial annual average X/Qs. The method used to develop these adjustment factors is the same as that discussed in the offsite dose calculation manual for Watts Bar Nuclear Plant. The 16 sector adjustment factors are the following:LPZ distance X/Qs for 8-hour, 16-hour, 3-day, and 26-day averaging periods were obtained by logarithmic interpolation between 1-hour values used for the 2-hour averaging period and annual average values. Sector values were interpolated between the 0.5th percentile 1-hour values assumed for the 2-hour time period and the annual average values for the respective sectors (e.g., between southeast sector 0.5th percentile 2-hour X/Q and southeast sector annual average X/Q). The 5th percentile

overall site X/Q values were interpolated between the 5th percentile 1-hour value (assumed for the 2-hour time period) for all sectors combined and the maximum sector annual average value selected from the 16 sector annual average values.2.3.4.2 Calculation ResultsThe 1-hour sector-specific and overall (all directions combined) atmospheric dispersion factors (X/Q) for the exclusion boundary are presented in Table 2.3-61 based on the 15-year data set of 1974-1988 and Table 2.3.61a based on the 20-year data set of 1974-1993. The maximum 0.5th and 5th percentile X/Q values are from the 15-year data set and are 6.040 x 10

-4 sec/m 3 and 5.323 x 10

-4 sec/m 3, respectively. The maximum 0.5th and 5th percentile X/Q values from the 20-year data sets (6.070 N NNE NE ENE E ESE SE SSE1.36 1.65 2.01 1.61 1.58 1.81 1.28 1.49 S SSW SW WSW W WNW NW NNW 1.81 1.77 1.86 1.47 1.00 1.49 1.00 1.00 2.3-16METEOROLOGY WATTS BARWBNP-94 x 10-4 sec/m 3 and 5.263 x 10

-4 sec m 3, respectively) are essentially unchanged from the 15-year values.The 1-hour 0.5th percentile, 1-hour 5th percentile, and annual average X/Q values for each of the 16 plume sectors and the 1-hour overall 0.5th and 5th percentile X/Q values for the low population zone distance are presented in Table 2.3-62 based on the 15-year data set of 1974-1988 and Table 2.3-62a based on the 20-year set of 1974-1993. Only minor differences exist between the two sets of values. For 8-hour, 16-hour, 3-day, and 26-day averaging periods, the X/Qs were obtained by logarithmic interpolation between the 1-hour and annual average X/Q values. The 5th percentile overall site 1-hour X/Q and the maximum sector annual average X/Q were used to produce the values given in Table 2.3-63 (1974-1988) and Table 2.3-63a (1974-1993).The 0.5th percentile 1-hour X/Q and annual average X/Q for each sector were used to produce the values given in Table 2.3-64 (1974-1988 and Table 2.3-65 (1974-1993).The maximum sector set corresponds to the southeast plume sector. The respective values are:In Section 2.3.3.3, the representativeness of the onsite data summarized in the joint frequency distributions of wind direction and wind speed by atmospheric stability class was discussed. Topographic effects have been mentioned previously, but some expansion relative to the 10-meter wind data is necessary. There is a predominance of northwest wind direction frequencies for a combination of very light wind speeds and quite stable atmospheric stability conditions. The terrain at the site has a general, gradual downward slope toward the south and southeast. Apparently, this is influencing the air flow over the site during periods with very light winds and stable conditions. Dispersion meteorology used in accident analyses in Chapter 15 include X/Q values in Table 2.3-66 and 1/U values in Table 2.3-67. These values were based on the 15-year data set for 1974-1988. Table 2.3-66a and 2.3-67a present the same information based on the 20-year data set for 1974-1993. The original FSAR values are presented with the updated bases for comparison.

2.3.5 Long-Term (Routine)

Diffusion EstimatesThe X/Qs and D/Qs and the respective calculation methodologies are presented in the Offsite Dose Calculation Manual for Watts Bar Nuclear Plant.

Period1974-19881974-19938-hour6.765 x 10

-56.677 x 10

-516-hour4.629 x 10

-54.592 x 10 day2.032 x 10

-52.039 x 10

-526-day6.230 x 10

-66.353 x 10

-6 METEOROLOGY 2.3-17WATTS BARWBNP-89The joint frequency distributions of wind speed and wind direction by stability class in Tables 2.3-45 through 2.3-51 form the basis for Offsite Dose Calculation Manual estimation of long-term X/Qs. RG 1.111 methodology is used to calculate these X/Qs from the onsite meteorological data base. Additional information is provided in the Offsite Dose Calculation Manual.The long-term representativeness of the 20-year onsite meteorological data base is discussed in Sections 2.3.3.3 and 2.3.4.2.

2.3-18METEOROLOGY WATTS BARWBNP-94REFERENCES (1)U. S. Atomic Energy Commission, A Meteorological Survey of the Oak Ridge Area, Weather Bureau, Publication ORO-99, Oak Ridge, Tennessee, November 1953, page 377.

(2)Ibid., page 192.

(3)Dickson, Robert R. Climates of the States - Tennessee, Climatography of the United States No. 60-40, U. S. Department of Commerce., Weather Bureau, February 1960, page 3.

(4)National Oceanic and Atmospheric Administration (NOAA), "A Summary of Tennessee Tornadoes, 1916-1970," National Weather Service Office for State Climatology, Nashville Metropolitan Airport, Nashville, Tennessee, December 1971.

(5)Vaiksnoras, John V. Tornadoes in Tennessee (1916-1970) with Reference to Notable Tornado Disasters in the United States (1880-1970) Issued by the University of Tennessee, Institute for Public Service, Knoxville, Tennessee, revised October 1972.

(6)U.S. Department of Commerce. Storm Data, August 1972-February 1989, NOAA, National Climatic Data Center, Asheville, North Carolina.

(7)From discussion with John V. Vaiksnoras, State Climatologist for Tennessee, National Weather Service Office, Nashville, Tennessee, July 6, 1972.

(8)Thom, H.C.S. "Tornado Probabilities," Monthly Weather Review, October-December 1963, pages 730-736.

(9)U.S. Department of Commerce. Severe Local Storm Occurrences, 1955-1967, ESSA Technical Memorandum, WBTM FCST 12, September 1969.(10)Tornado data for the Watts Bar Nuclear Plant Site, prepared by the National Severe Storms Forecast Center, NO AA, NWS, Kansas City, Missouri, November 1987.

(11)U.S. Department of Commerce. Local Climatological Data, Annual Summary with Comparative Data, 2008, Chattanooga, Tennessee, NOAA, National Climatic Data Center, Asheville, North Carolina.

(12)U.S. Department of Commerce. Local Climatological Data, Annual Summary with Comparative Data, 2008, Knoxville, Tennessee, NOAA, National Climatic Data Center, Asheville, North Carolina.

(13)U.S. Department of Commerce. Climatography of the United States No. 20, 1971-2000 Dayton 2, SE, TN.

METEOROLOGY 2.3-19WATTS BARWBNP-94 (14)Pierce, E. T. "Natural Lightning Parameters and Their Simulation in Laboratory Tests," from 1975 Lightning and Static Electricity Conference Proceedings, Culham, England, April 1975.

(15)Korshover, J. "Climatology of Stagnating Anticyclones East of the Rocky Mountains, 1936-1970," NOAA Technical Memorandum ERL ARL-34, U.S.

Department of Commerce, Air Resources Laboratories, Silver Spring, Maryland, October 1971.

(16)Holzworth, G. C. Mixing Heights, Wind Speeds, and Potential for Urban Air Pollution Throughout the Contiguous United States, Environmental Protection Agency, Research Triangle Park, North Carolina, January 1972.

(17)U.S. Department of Commerce/U.S. Department of Agriculture. Weekly Weather and Crop Bulletin, NOAA/USDA Joint Agricultural Weather Facility, Washington, D.C., December 18, 1984, page 14.

(18)Tattelman, Paul, et al. "Estimated Glaze Ice and Wind Loads at the Earth's Surface for the Contiguous United States," Air Force Cambridge Research Laboratories, L. G. Hanscom Field, Massachusetts, October 16, 1973.

(19)American Meteorological Society. "Extremes of Snowfall: United States and Canada," Weatherwise, Vol. 23, December 1970, page 291.

(20)American National Standards Institute, Inc. "American National Standard Building Code Requirements for Minimum Design Loads in Buildings and Other Structures." A58.1-1972, New York, New York, Figure 4, page 27.

(21)Ludlum, David M. Weather Record Book, United States and Canada, Weatherwise, Inc., 1971, page 73.

(22)Thom, H. C. S. "New Distributions of Extreme Winds in the United States," "Journal of the Structural Division Proceedings of the American Society of Civil Engineers, Paper 6038, July 1968, pages 1787-1801.

(23)Tennessee Valley Authority. Record for TVA raingauge station 421, Watts Bar Dam, Tennessee, Data Services Branch, Knoxville, Tennessee, summarized February 1976 and updated for extremes in October 1989.

(24)Deleted by Amendment 94.

(25)Magnetic tape of Chattanooga, Tennessee, National Weather Service Station data, obtained from the National Climatic Data Center, Asheville, North Carolina. Period of data analyzed, 1965-1971.

(26)U.S. Department of Commerce. Local Climatological Data, Annual Summary with Comparative Data, 2008, Oak Ridge, Tennessee, NOAA, National Climatic Data Center, Asheville, North Carolina.

2.3-20METEOROLOGY WATTS BARWBNP-94 (27)Hardwick, W. C. "Monthly Fog Frequency in the Continental United States," Monthly Weather Review, Volume 101, October 1973, pages 763-766.

(28)Tennessee Valley Authority. Final Safety Analysis Report for Sequoyah Nuclear Plant, Section 2.3, Figure 2.3-5.

(29)Hosler, C. R. "Low-Level Inversion Frequency in the Contiguous United States," Monthly Weather Review, Vol. 89, September 1961, pages 319-339.

(30)U.S. Department of Commerce. Local Climatological Data, January 1982, Knoxville, Tennessee, NOAA, National Climatic Data Center, Asheville, North Carolina.

(31)U.S. Department of Commerce. Local Climatological Data, January 1982, Chattanooga, Tennessee, NOAA, National Climatic Data Center, Asheville, North Carolina.

(32)U.S. Department of Commerce. Daily Weather Maps, January 18-24, 1982, NOAA, Washington, D.C.

(33)U.S. Department of Commerce. Local Climatological Data, December 1989, Chattanooga, Tennessee, NOAA, National Climatic Data Center, Asheville, North Carolina.

(34)U.S. Department of Commerce. Local Climatological Data, December 1989, Knoxville, Tennessee, NOAA, National Climatic Data Center, Asheville, North Carolina.

(35)U.S. Department of Commerce. Daily Weather Maps, December 25-31, 1989, NOAA, Washington, D.C.

(36)U.S. Atomic Energy Commission. Regulatory Guide 1.23, Revision 0, "Onsite Meteorological Programs," Washington, D.C., February 1972.

(37)Tennessee Valley Authority. "Watts Bar Nuclear Plant Environmental Data Station Manual." (38)Deleted by Amendment 94.

(39)Deleted by Amendment 94.

(40)U.S. Atomic Energy Commission. Regulatory Guide 1.21, Revision 1, "Measuring, Evaluating, and Reporting Radioactivity in Solid Wastes and Releases of Radioactive Materials in Liquid and Gaseous Effluents from Light-Water-Cooled Nuclear Power Plants," Washington, D.C., June 1974.

(41)U.S. Nuclear Regulatory Commission. Regulatory Guide 1.145, Revision 1, "Atmospheric Dispersion Models for Potential Accident Consequence Assessment at Nuclear Power Plants," Washington, D.C., November 1982.

METEOROLOGY 2.3-21WATTS BARWBNP-94 (42)U.S. Atomic Energy Commission. Regulatory Guide 1.4, Revision 2, "Assumptions Used for Evaluating the Potential Radiological Consequences of a Loss of Coolant Accident for Pressurized Water Reactors," Washington, D.C., June 1974.

(43)U.S. Nuclear Regulatory Commission. Regulatory Guide 1.111, Revision 1, "Methods for Estimating Atmospheric Transport and Dispersion of Gaseous Effluents in Routine Releases from Light-Water-Cooled Reactors," Washington, D.C., July 1977.

2.3-22METEOROLOGY WATTS BARWBNP-94Table 2.3-1 Thunderstorm Day Frequencies Chattanooga 11 National Oceanic and Atmosp heric Administration, 2008 Local Climatological Data Annual Summary with Comparative Data Chattanooga, TN (KCHA) period of record 61 years.Knoxville 22 Knoxville, TN (KTYS)DecemberJanuary February 0.6 1.3 2.0 0.70.81.5Winter3.93March April May 3.6 4.8 7.1 3.2 4.6 6.8Spring15.514.6 June July August 9.011.1 8.8 8.4 9.8 6.8Summer28.925SeptemberOctober November 3.9 1.4 1.5 3.0 1.3 1.1Fall6.85.4Annual55.148 METEOROLOGY 2.3-23WATTS BARWBNP-94*Climatography of the United States No. 20 1971-2000 Dayton 2 SE, TN National Climate Data Center, Ashville, NC.Table 2.3-2 Temperature Data (°F) Dayton, Tennesee*Month DailyAverage DailyAverageMaximum DailyAverage Minimum Extreme Maximum Extreme MinimumJanuary36.245.926.575-15February40.551.629.379-4 March48.860.836.7853 April57.470.344.49222 May65.477.353.59430 June73.384.761.810040 July76.987.766.110749 August76.086.965.010449 September70.181.059.110030 October58.370.446.19023 November48.158.837.3839 December39.349.029.676-5 Annual57.568.746.3107-15 2.3-24METEOROLOGY WATTS BARWBNP-94*Local Climatological Data, Annual Summary with Comparative Data, 1974 and 1988 , Chattanooga, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, N.C.a.Normals - based on record for the 1971-2000 period.

b.Period of record, 1928-2001.

c.1952.

d.1966. Table 2.3-3 Temperature Data (°F) Chattanooga, Tennessee

  • Month DailyAverage a DailyAverageMaximum a DailyAverage Minimum a Extreme Maximum b Extreme Minimum bJanuary39.448.829.9 78 -10 dFebruary43.454.132.6 79 1March51.462.840.089 8 April59.672.147.0 9325 May67.779.156.2 99 34 June75.486.264.6 104 41 July79.689.869.4 106 c 51August78.588.768.3 105 50 September72.182.561.7 102 36 October60.472.348.5 94 22 November50.361.139.5 84 4 December42.452.032.7 78 -2 Annual60.070.849.2 106 c -10 d METEOROLOGY 2.3-25WATTS BARWBNP-63*TVA raingage station 421, located on roof of Control Building at Watts Bar Dam.a. January 1946.
b. September 1957.Table 2.3-4 Watts Bar Dam Precipitation Data (Inches)*(1940-1975)(9/39-9/89 Extremes Recorded)MonthAverage No.of Days 0.01Inch or More(1941- 1970)AverageExtremeMaximumExtremeMinimum24-hourMaximumJanuary 115.3011.670.935.31 aFebruary 105.349.790.743.50 March 115.6211.751.325.00 April 104.568.660.803.10 May 93.5710.940.563.20 June 93.8112.300.033.73 July l05.1412.500.504.80 August 93.207.130.523.19 September 73.6914.78 b0.454.50 October 62.907.910.003.05 November 84.1314.060.944.63 December 105.3112.080.304.15 Annual11052.57 2.3-26METEOROLOGY WATTS BARWBNP-94*Climatography of the United States No. 20 1971-2000 Dayton 2 SE, TN National Climate Data Center, Ashville, NC.a.1979 b.1993Table 2.3-5 Snowfall Data (Inches)

Dayton, TennesseeMonthMonthlyAverage*MaximumMonthly*Maximum in24 Hrs. *January1.89.77 February1.613.37 March0.8138 April.130 May000 June000 July000 August000 September000 October000 NovemberTraceTraceTrace December0.11.13 Annual4.413.3 a 8 b METEOROLOGY 2.3-27WATTS BARWBNP-94 a.Local Climatological Data, Annual Summary with Comparative Data, 2008, Chattanooga, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, N.C.b.Local Climatological Data, Annual Summary with Comparative Data, 2008, Knoxville, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, N.C.c.Period of record, 1971-2000.

d.Chattanooga record, 1971-20 00; Knoxville record, 1971-2000e.Maximum in locality was 20 inches, March 1993.f.Maximum in locality was 18.4 inches, February 1979.

g.Maximum in locality was 18.5 inches, March 1993.h.March 1993.Table 2.3-6 Snowfall Data (Inches)

Chattanooga and Knoxville, Tennessee a,bMonthly Average c Maximum Monthly dMaximum in 24 Hrs.

dMonthChat.Knox.Chat.Knox.Chat.Knox.January2.03.7 10.214.210.28.8February1.33.08.7 18.45.58.1March1.21.62015.118.511.1 April0.2.82.810.72.810.5May000Trace00June00 0 000 July00 0 000August00 0 000September00 0 000 OctoberTraceTraceTraceTraceTraceTraceNovember0.10.31.00.31.0December0.1.71.93.31.62.0 Annual4.89.92018.418.511.1 2.3-28METEOROLOGY WATTS BARWBNP-94*Local Climatological Data, Annual Summary with Comparative Data, 2008, Chattanooga, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, N.C.Period of record, 1979-2008.Table 2.3-7 Average Relative Humidity Data (Percent) - Selected Hours Chattanooga, Tennessee*(Eastern Standard Time)MonthHour0100Hour0700 Hour1300 b Hour1900 bJanuary79816366February77825858 March76825553 April78854949 May87895558 June87905760 July87905762 August88925864 September89925966 October88915568 November83865968 December80836268 Annual83875762 METEOROLOGY 2.3-29WATTS BARWBNP-94*Analysis based on data tapes obtained from National Climatic Data Center, Asheville, North Carolina. Observations recorded on tape are for 3-hourly synoptic times.Table 2.3-8 Relative Humidity (Percent)

National Weather Service StationChattanooga, Tennessee*January 1965-December 1971MonthAverageAvg. Max.Avg. Min.Extreme Max.Extreme Min.December75.383.667.7100.010.7January72.374.669.5100.018.6 February 67.076.858.0100.012.1 Winter71.578.365.1100.010.7March64.171.455.0100.013.8 April64.672.356.9100.012.8 May71.177.165.0100.019.0 Spring66.673.658.9100.012.8June72.377.468.3100.023.1 July75.580.171.2100.026.9 August78.482.975.3100.032.5 Summer75.480.171.6100.023.1September79.784.075.2100.026.0 October76.683.071.1100.018.2 November72.679.766.2100.016.1 Fall76.382.270.8100.016.1 Annual72.578.666.6100.010.7 2.3-30METEOROLOGY WATTS BARWBNP-63*Analysis based on data tapes obtained from National Climatic Data Center, Asheville, North Carolina. Observations recorded on tape are for 3-hourly synoptic times.Table 2.3-9 Absolute Humidity (gm/m

3) National Weather Service StationChattanooga, Tennessee*January 1965-December 1971MonthAverageAvg. Max.Avg. Min.Extreme Max.Extreme Min.December 5.8 7.2 4.516.10.9January 4.8 5.3 4.514.00.4 February 4.5 5.8 3.414.10.8 Winter 5.0 6.1 4.116.10.4March 5.9 7.2 4.616.61.1 April 8.610.3 7.020.12.4 May11.412.8 9.919.63.4 Spring8.610.1 7.120.11.1June14.715.913.522.74.9 July16.717.715.624.28.6 August17.018.216.025.89.6 Summer16.117.315.025.84.9September14.816.213.623.64.2 October10.011.68.520.83.0 November6.57.95.117.81.2 Fall10.411.99.123.61.2 Annual10.011.48.825.80.4 METEOROLOGY 2.3-31WATTS BARWBNP-63*Meteorological facility located 0.8 km SSW of Watts Bar Nuclear Plant. Temperature and dewpoint instruments at 4 feet above ground.Table 2.3-10 Relative Humidity (Percent)

Watts Bar Nuclear Plant Meteorological Facility

  • July 1, 1973 - June 30, 1975MonthAverageAvg. Max.Avg. Min.Extreme Max. Extreme Min. December71.285.153.8100.030.2January73.687.554.5100.010.4 February70.387.550.9100.021.4 Winter71.786.753.1100.010.4March69.988.449.8100.022.6 April64.587.838.6100.011.2 May78.394.156.9100.028.3 Spring70.990.148.5100.011.2June75.291.655.0100.034.6 July76.293.448.4100.010.1 August78.793.655.1100.036.7 Summer76.792.952.9100.010.1September77.991.856.8100.029.3 October71.589.943.2100.019.7 November69.087.047.4 96.526.9

Fall72.889.649.1100.019.7 Annual73.089.850.9100.010.1 2.3-32METEOROLOGY WATTS BARWBNP-65 *Calculations based on temperature and dewpoint measurements 4 feet above ground.**Meteorological facility located 0.8 km SSW of Watts Bar Nuclear Plant.Table 2.3-11 Absolute Humidity (Gm/m 3)* Watts Bar Nuclear Plant Meteorological Facility

    • July 1, 1973 - June 30, 1975MonthAverageAvg. Max.Avg. Min.Extreme Max. Extreme Min. December5.26.64.014.51.5January6.17.84.313.21.0 February5.77.34.315.11.5 Winter5.77.24.215.11.0March7.18.95.314.71.8 April8.310.36.417.72.0 May13.715.911.621.54.9 Spring9.711.77.821.51.8June14.717.212.422.17.8 July17.119.313.722.71.8 August16.718.914.924.410.1 Summer16.218.413.724.41.8September14.416.512.521.94.9 October9.211.07.717.73.1 November7.08.75.416.62.1

Fall10.212.18.521.92.1 Annual10.412.48.524.41.0 METEOROLOGY 2.3-33WATTS BARWBNP-94*Mean number of days with heavy fog, which is defined by horizontal visibility 1/4 mile or less.a.Local Climatological Data, Annual Summary with Comparative Data, 2008, Chattanooga, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, North Carolina. Period of record, 1979-2008.

Period of Record 45 years.b.Local Climatological Data, Annual Summary with Comparative Data, 2008, Knoxville, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, North Carolina. Period of record, 1979-2008.

Period of Record 45years.c.Local Climatological Data, Annual Summary with Comparative Data, 2008, Oak Ridge, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, North Carolina. Period of record, 1979-2008. Record 9 years.d.Hardwick, W. C. "Monthly Fog Frequency in the Continental United States", Monthly Weather Review , Volume 101, October 1973, pages 763-766.Table 2.3-12 Fog Data

  • MonthChat.

aKnox.b Oak R.cEst. from Hardwick d January2.92.62.71 February1.51.81.32 March1.21.61.81 April1.31.31.81 May2.22.25.62 June1.61.94.82 July1.62.16.12 August1.93.55.03 September3.43.77.54 October4.84.27.76 November3.42.94.44 December2.42.44.13 Annual28.230.252.833 2.3-34METEOROLOGY WATTS BARWBNP-89Table 2.3-13 Joint Percentage Frequencies of Wind Speed By Wind Direction Disregarding Stability Class Watts Bar Nuclear PlantJan 1, 74 - Dec 31, 88 WIND SPEED(MPH)

WIND DIRECTIONCALM0.6-1.41.5-3.43.5-5.45.5-7.47.5-12.412.5-18.418.5-24.4>=24.5TOTALN0.067 0.683 1.401 1.693 1.432 1.5860.0760.0000.000 6.938NNE0.065 0.588 1.432 2.102 1.996 2.1890.1200.0000.000 8.492NE0.081 0.690 1.815 1.663 1.079 0.7470.0110.0010.000 6.088ENE0.131 1.066 3.004 1.354 0.487 0.1760.0030.0000.000 6.221E0.087 0.995 1.687 0.660 0.172 0.0540.0020.0000.000 3.658ESE0.030 0.405 0.537 0.205 0.034 0.0150.0010.0000.000 1.227SE0.047 0.595 0.851 0.340 0.081 0.0580.0180.0000.000 1.990SSE0.083 0.890 1.670 0.627 0.196 0.1700.0430.0040.000 3.681S0.114 0.995 2.551 1.848 0.893 0.7780.2130.0260.001 7.419SSW0.140 1.079 3.265 3.970 3.067 3.3510.7160.0640.000 15.652SW0.116 1.240 2.363 1.471 0.807 0.5560.0920.0050.001 6.650WSW0.127 1.730 2.208 0.694 0.394 0.3630.1050.0050.000 5.626W0.130 2.012 2.003 0.678 0.586 0.7010.1100.0100.002 6.232WNW0.119 2.059 1.613 0.633 0.563 0.8050.0920.0060.000 5.890NW0.158 2.581 2.308 0.783 0.738 1.0820.1160.0020.000 7.768NNW0.097 1.445 1.572 1.016 0.944 1.3090.0830.0010.000 6.468SUBTOTAL1.59319.05530.27919.73713.47113.9391.7990.1240.004100.000 METEOROLOGY2.3-35WATTS BAR WBNP-63Table 2.3-14 Joint Percentage Frequencies Of Wind SpeedBy Wind Direction Disregarding Stability Class , Watts Bar Nuclear PlantJan 1, 74 - Dec 31, 88Wind( Wind Speed(Mph)DirectionCalm0.6-1.41.5-3.43.5-5.45.5-7.47.5-12.412.5-18.418.5-24.4>=24.5TotalN0.068 0.502 1.248 1.148 1.305 2.8630.5120.0140.000 7.659 NNE0.115 0.739 2.240 2.276 2.220 3.0110.4330.0080.000 11.041NE0.170 1.075 3.314 2.464 1.648 1.6470.1230.0010.000 10.442ENE0.149 0.997 2.858 1.317 0.758 0.4580.0290.0000.000 6.566E0.077 0.841 1.137 0.521 0.209 0.1070.0100.0000.000 2.901 ESE0.036 0.423 0.511 0.286 0.061 0.0320.0030.0010.000 1.353SE0.039 0.381 0.632 0.338 0.111 0.0910.0330.0110.000 1.636SSE0.076 0.581 1.382 0.716 0.215 0.2660.1180.0180.000 3.372S0.122 0.710 2.441 1.832 0.912 0.9130.3350.1020.017 7.383SSW0.149 0.660 3.189 4.307 3.445 4.5591.9320.3630.041 18.644SW0.085 0.520 1.684 1.997 1.715 2.4570.7930.1300.021 9.403WSW0.055 0.398 1.009 0.766 0.523 0.8000.3210.0900.024 3.984W0.044 0.391 0.752 0.434 0.399 0.8780.3320.0590.009 3.298WNW0.036 0.381 0.558 0.420 0.468 1.2530.4480.0290.002 3.596NW0.041 0.371 0.683 0.500 0.653 1.4210.4200.0260.002 4.116NNW0.043 0.385 0.722 0.654 0.708 1.6100.4660.0160.001 4.606Subtotal1.307 9.35524.35919,97515.35022.3656.3080.8660.116100.000Total Hours Of Valid Wind ObservationsTotal Hours Of ObservationsRecoverability PercentageMeteorological Facility Located 0.8 Km SSW Of Watts Bar Nuclear Plant101227Wind Speed And Direction Measured At 46.36 Meter Level105192Mean Wind Speed = 5.81 96.2Note: Totals And Subtotals Are Obtained From Unrounded Numbers

METEOROLOGY2.3-36WATTS BAR WBNP-65Table 2.3-15 Wind Direction Persistence Data Disregarding Stability, Watts Bar Nuclear PlantJan 1, 74 - Dec 31, 88 (Sheet 1 of 2)PersistenceWind DirectionACC. ACC. (Hours)NNNENEENEEESESESSESSSWSWWSWWWNWNWNNWCALMTOTAL TOTALFREQUENCY 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 665 260 169 111 82 59 52 28 24 19 13 10 4 2 4 3 2 3 3 1 1 0 0 1 0 0 0 0 663 356 228 138118 74 64 32 43 24 14 12 9 10 5 7 6 7 5 5 4 0 3 0 1 0 0 0 645 266 172 104 62 51 26 10 11 6 2 3 3 0 3 1 2 0 0 0 0 0 0 0 1 0 0 0 731 336 166 101 52 28 16 8 9 2 1 2 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0428166 60 26 14 6 2

0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 103 32 8 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 170 63 17 8 2 3 0

0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 369 167 60 20 17 3 4

2 2 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 800 369 207 122 82 38 20 14 7 11 8 1 2 1 0 1 0 0 0 0 0 1 0 1 0 0 0 0 931 526 399 305 201 200 140 106 98 72 59 50 31 28 17 14 14 18 9 1 6 5 2 2 6 2 3 0 739 287 148 97 30 27 20 11 8 5 0 1 2 3 0 1 1 0 0 1 0 0 0 0 0 0 0 0 608 247 100 49 34 17 15 5 5 4 0 1 0 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 709 275 152 87 52 18 28 6 8 4 2 0 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 622 243 140 94 49 24 15 14 4 8 2 1 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 802 393 208 133 86 50 42 18 10 9 2 2 0 1 2 0 1 2 0 1 0 0 0 0 1 1 0 0 660 304 166 88 62 38 20 24 8 9 6 5 1 6 2 1 0 1 0 1 0 1 1 1 0 0 1 0 143 85 44 27 20 12 5 4 2 0 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 9788 4375 2444 1510 963 648 469 282 239 173 112 89 56 53 36 28 28 33 17 10 11 7 6 5 9 3 4 02141111623 7248 4804 3294 2331 1683 1214 932 693 520 408 319 263 210 174 146 118 85 68 58 47 40 34 29 20 17 13 100.00 54.29 33.85 22.44 15.38 10.89 7.86 5.67 4.35 3.24 2.43 1.91 1.49 1.23 0.98 0.81 0.68 0.55 0.40 0.32 0.27 0.22 0.19 0.16 0.14 0.09 0.08 0.06 METEOROLOGY2.3-37WATTS BAR WBNP-65Meteorological Facility Located 0.8 Km SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At The 9.72 Meter Level MaximumPersistence (Hours)253726161641218254421181919272814 50.0%80.0%

90.0%99.0%99.9% 3 6 8 16 22 3 6 9 20 26 3 5 6 12 18 2 4 5 10 13 2 3 4 7 16 2 3 3 4 4 2 3 4 7 12 2 3 4 8 18 3 4 6 11 23 4 8 11 22 37 2 4 5 11 18 2 4 5 10 16 2 4 5 10 15 2 4 5 11 14 3 5 6 11 26 3 4 6 15 25 3 5 6 10 14Table 2.3-15 Wind Direction Persistence Data Disregarding Stability, Watts Bar Nuclear PlantJan 1, 74 - Dec 31, 88 (Sheet 2 of 2)PersistenceWind DirectionACC. ACC. (Hours)NNNENEENEEESESESSESSSWSWWSWWWNWNWNNWCALMTOTAL TOTALFREQUENCY METEOROLOGY2.3-38WATTS BAR WBNP-63Table 2.3-16 Wind Direction Persistence Data Disregarding Stability, Watts Bar Nuclear PlantJan 1, 77 - Dec 31, 88 (Sheet 1 of 2)PersistenceWind Direction ACC.ACC.(Hours)NNNENEENEEESESESSESSSWSWWSWWWNWNWNNWCALMTOTALTOTALFREQUENCY 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29553240152110 82 63 33 34 24 13 16 4 13 6 4 2 1 3 0 1

2 0 0 0 0 1 1 0 713 358 245 133118 97 47 41 34 18 25 17 14 16 9 6 9 7 2 3

5 2 0 3 0 1 0 0781370279177110 89 50 41 27 12 24 8 8 6 4 2 2 1 0 1

1 0 0 0 1 1 0 0622271156 78 52 24 18 4 7 2 1 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0257 79 36 10 1 3 2 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0104 18 12 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0 130 43 13 7 2 3 0 1 1 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0315103 47 18 8 5 1 1 1 0 1 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0720312150 90 60 29 13 8 7 5 2 1 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 0885540408269 202174126 100 87 66 60 43 46 36 19 17 16 12 13 5 10 7 1 4 1 2 2 5768364232136 81 51 38 35 12 9 8 8 3 2 0 1 1 1 2 2

1 2 0 0 0 0 0 0 352114 59 40 19 9 8 8 1 3 1 1 0 2 0 0 0 0 1 0

0 0 0 0 0 0 0 0274 85 70 32 26 11 9 5 3 0 1 1 2 1 1 0 0 0 0 0

0 0 0 0 0 0 0 0258124 97 47 39 23 10 11 2 4 2 0 2 0 1 0 0 1 0 0

0 0 0 0 0 0 0 0300151 80 64 36 24 9 11 9 6 4 4 4 2 4 1 1 1 0 1

0 1 0 0 0 0 0 0362180 82 47 35 22 23 15 6 11 8 0 3 1 2 1 0 0 0 0

0 0 0 0 0 0 0 0 133 54 29 13 13 1 4 0 0 2 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0 0 07527340621471275 885 625 396 315 220 152 152 88 93 74 41 30 31 25 19 12 20 11 1 9 2 5 3 51758210055 6649 4502 3227 2342 1717 1321 1006 786 634 482 394 301 227 186 156 125 100 81 69 49 38 37 28 26 21 18100.00 57.19 37.82 25.61 18.35 13.32 9.77 7.51 5.72 4.47 3.61 2.74 2.24 1.71 1.29 1.06 0.89 0.71 0.57 0.46 0.39 0.28 0.22 0.21 0.16 0.15 0.12 0.10 METEOROLOGY2.3-39WATTS BAR WBNP-63Meteorological Facility Located 0.8 Km SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At The 9.72 Meter Level 30 31 32>32 TOTAL 0 0 0 01358 1 0 0 11925 0 0 0 01995 0 0 0 01253 0 0 0 0388 0 0 0 0138 0 0 0 0 198 0 0 0 0 506 0 0 0 01397 0 2 0 83166 0 0 1 01760 0 0 0 0 618 0 0 0 0521 0 0 0 0621 0 0 0 0709 0 0 0 0798 0 0 0 0 249 1 2 1 917582 13 12 10 9 0.07 0.07 0.06 0.05 MAXIMUMPERSISTENCE (HOURS)28332712 85 91813413220161922171150.0%80.0%90.0%99.0%

99.9% 3 6 8 16 27 3 6 9 19 30 3 5 7 14 26 2 4 5 9 11 2 3 4 7 8 2 3 4 5 5 2 3 4 8 9 2 3 4 8 18 2 4 5 10 12 4 8 11 23 34 3 5 7 14 25 2 4 5 11 20 2 4 6 12 16 3 5 6 11 19 3 5 7 15 27 3 5 7 12 17 2 4 5 8 11Table 2.3-16 Wind Direction Persistence Data Disregarding Stability, Watts Bar Nuclear PlantJan 1, 77 - Dec 31, 88 (Sheet 2 of 2)

METEOROLOGY2.3-40WATTS BAR WBNP-63Table 2.3-17 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class , Watts Bar Nuclear PlantJanuary (74-88) WindWind Speed(MPH)

Direction CALM 0.6-1.4 1.5-3.4 3.5-5. 5.5-7.47.5-12.4 12.5-18.4 18.5-24.4>=24.5 Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW SUBTOTAL0.0610.0680.0900.131 0.0780.0250.034 0.0740.0670.1110.0670.0960.105 0.0920.1280.097 1.3250.6400.4840.7400.914 0.7400.2920.320 0.6670.4020.704 0.6400.8951.343 1.3161.6631.096 2.8561.2881.6542.0833.189 1.7000.4930.758 1.6631.7092.778 1.4622.1201.955 1.5812.3481.93728.7191.4712.2931.9461.179 0.4930.1550.192 0.4021.1243.445 1.1701.3521.069 1.0421.2791.48920.1021.7642.1931.1150.384 0.2010.0460.037 0.1010.8412.440 0.8590.9691.352 1.0331.4621.55316.3472.2662.2110.5760.1280.1190.0270.000 0.0180.5032.979 0.5760.8771.389 1.6262.2392.33917.8730.1010.1280.0000.000 0.0000.0000.0000.0370.2010.685 0.1920.4200.3750.1190.2470.174 2.677 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.027 0.018 0.027 0.000 0.009 0.018 0.000 0.000 0.000 0.101 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0007.5919.0326.5505.924 3.3311.0391.341 2.9894.86413.1684.9656.7397.607 6.8089.3668.686100.000Total Hours Of Valid Wind Observations10944Total Hours Of Observations11160Recoverability Percentage98.1Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 4.81 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-41WATTS BAR WBNP-63Table 2.3-18 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class , Watts Bar Nuclear PlantJanuary (77-88) WindWind Speed (MPH)DirectionCalm0.6-1.41.5-3.43.5-5.45.5-7.47.5-12.412.5-18.418.5-24.4>=24.5Total NNNE NE ENE EESE SESSE S SSW SWWSW W WNW NWNNW SUBTOTAL0.0530.0850.1060.099 0.0670.0200.025 0.0440.0740.093 0.0550.0410.034 0.0270.0310.037 0.8920.3090.4580.6060.595 0.6060.2520.355 0.3660.4000.343 0.3770.2750.252 0.2860.2170.309 6.0051.3152.1622.6422.448 1.4530.3660.400 0.9951.8762.505 1.3150.9950.801 0.5380.7430.81221.3661.1322.4362.7681.155 0.3090.0920.092 0.3661.1903.431 1.4410.7210.435 0.7090.7890.97218.0371.3612.5282.2070.595 0.0690.0230.103 0.1720.6182.848 1.5210.6180.869 1.0751.4071.23517.248 3.477 3.397 1.990 0.229 0.034 0.000 0.023 0.023 0.526 3.683 2.642 1.418 1.658 2.573 3.042 2.699 27.4160.7890.5490.0570.000 0.0000.0000.0000.0110.1371.2580.7890.5030.732 0.8581.1670.766 7.618 0.000 0.000 0.000 0.000 0.000 0.0000.011 0.000 0.069 0.343 0.103 0.252 0.297 0.034 0.080 0.000 1.1900.0000.0000.0000.000 0.0000.0000.000 0.0000.0230.023 0.0460.0920.046 0.0000.0000.000 0.2298.43711.61510.3775.120 2.5380.7521.008 1.9774.91214.5278.2904.9145.124 6.1007.4776.831100.000Total Hours Of Valid Wind Observations8743Total Hours Of Observations8928Recoverability Percentage97.9Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed and Direction Measured at 46.36 Meter Level Mean Wind Speed = 6.57 Note: Totals and Subtotals are Obtained From Unrounded Numbers METEOROLOGY2.3-42WATTS BAR WBNP-63Table 2.3-19 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class , Watts Bar Nuclear PlantFebruary (74-88)WindWind Speed (MPH)Direction Calm0.6-1.41.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total NNNE NE ENE EESE SESSE SSSW SWWSW W WNW NWNNW SUBTOTAL0.0770.0790.1010.171 0.0810.0240.031 0.0460.0750.099 0.0800.0900.097 0.0760.1310.084 1.341 0.595 0.666 0.777 1.543 0.857 0.313 0.464 0.514 0.605 0.756 0.716 0.958 1.251 1.059 1.795 1.00813.8771.7951.8052.3703.782 1.6740.4240.514 0.9181.7452.340 1.7851.8351.7651.3112.2791.62427.965 1.704 2.693 2.0371.311 0.555 0.121 0.192 0.383 0.988 2.652 1.573 1.049 0.908 0.676 0.918 1.39219.151 1.523 2.521 1.281 0.393 0.252 0.061 0.030 0.141 0.474 2.229 1.029 0.797 0.817 0.958 1.261 1.18014.9462.1582.5720.9780.1610.1110.0000.050 0.1510.5243.267 1.3610.9581.190 1.4521.8352.30919.0800.0610.1410.0400.0000.0100.0000.000 0.0500.3831.412 0.2320.3130.171 0.2620.2120.182 3.4690.0000.0000.0000.000 0.0000.0000.000 0.0100.0300.071 0.0100.0100.010 0.0300.0000.000 0.1710.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0007.91210.4777.5847.361 3.5400.9411.282 2.2144.82512.8266.7876.0096.208 5.8248.4307.779100.000Total Hours Of Valid Wind Observations9916Total Hours Of Observations10176Recoverability Percentage97.4Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 4.92 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-43WATTS BAR WBNP-63Table 2.3-20 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class , Watts Bar Nuclear PlantFebruary (77-88)WindWind Speed (MPH)DirectionCalm0.6-1.41.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total NNNE NE ENE EESE SESSE S SSW SWWSW W WNW NWNNWSUBTOTAL0.0470.0850.1260.096 0.0400.0160.016 0.0300.0460.048 0.0380.0280.024 0.0200.0220.029 0.7120.4000.6500.7370.925 0.5500.2620.187 0.3750.3750.250 0.3250.2870.287 0.3620.2000.275 6.4471.4242.6364.1232.799 0.9870.3500.450 0.7751.4121.599 1.1620.8120.650 0.4250.6500.86221.1141.3123.2983.1361.524 0.4370.2000.150 0.3750.8502.5111.9370.7120.487 0.4120.4370.86218.6411.9492.7112.4110.887 0.1250.0120.012 0.0750.5002.086 1.5620.5250.487 0.5501.0000.95015.8423.8113.5732.0110.462 0.0750.0000.0620.1120.5623.373 2.6991.3491.462 2.1742.6492.24926.6240.7370.7000.3250.050 0.0500.0000.0000.1000.4251.712 1.2620.6500.525 0.7370.7250.937 8.9330.0000.0000.0000.000 0.0000.0000.000 0.0500.1620.600 0.2500.1620.125 0.0620.0500.062 1.5240.0000.0000.0000.000 0.0000.0000.000 0.0000.0120.062 0.0370.0500.000 0.0000.0000.000 0.1629.68013.65312.8696.743 2.2640.8400.879 1.8914.34412.2429.2714.5764.047 4.7435.7326.226100.000Total Hours Of Valid Wind Observations8004Total Hours Of Observations8136Recoverability Percentage 98.4Meteorological Facility Located 0.8 Km SSW Of Watts Bar Nuclear PlantWind Speed and Direction Measured at 46.36 Meter Level Mean Wind Speed = 6.66 Note: Totals and Subtotals are Obtained From Unrounded Numbers METEOROLOGY2.3-44WATTS BAR WBNP-63Table 2.3-21 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class , Watts Bar Nuclear PlantMarch (74-88)WindWind Speed (MPH)

DirectionCalm0.6-1.41.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total NNNE NE ENE E ESE SE SSE SSSW SWWSW W WNW NWNNWSUBTOTAL0.0570.0610.0870.146 0.0790.0260.037 0.0520.0600.079 0.072 0.0910.0790.070 0.1000.0601.1550.5030.6520.9501.323 0.9220.3450.568 0.6330.6240.624 0.680 1.0531.2391.136 1.5740.85713.6831.4061.3971.9933.595 1.7420.5310.6891.1181.3972.049 1.742 2.0031.4161.239 1.8161.17425.307 1.565 1.751 1.406 1.155 0.577 0.149 0.317 0.568 1.313 3.484 1.481 0.680 0.717 0.615 1.127 1.08017.9861.5001.6210.9590.615 0.1860.0750.158 0.2610.6713.335 1.183 0.4560.5220.466 0.9131.32314.2422.3102.4591.2480.205 0.0280.0280.224 0.4751.3415.933 1.183 0.5961.1081.388 1.9932.07722.5970.1490.1210.0370.019 0.0000.0000.140 0.1680.5872.133 0.233 0.1210.2510.186 0.2890.1774.6110.0000.0000.0000.000 0.0000.0000.000 0.0000.1120.084 0.000 0.0190.0840.037 0.0280.0090.3730.0000.0000.0000.000 0.0000.0000.000 0.0000.0090.000 0.009 0.0000.0280.000 0.0000.0000.0477.4898.0626.6827.057 3.5351.1532.133 3.2756.11417.7216.583 5.0185.4445.137 7.8416.757100.000Total Hours of Valid Wind Observations10736Total Hours of Observations11160Recoverability Percentage96.2Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed and Direction Measured At 9.72 Meter Level Mean Wind Speed = 5.35 Note: Totals and Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-45WATTS BAR WBNP-63Table 2.3-22 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class , Watts Bar Nuclear PlantMarch (77-88)WindWind Speed (MPH)

Direction Calm0.6-1.41.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total NNNE NE ENE EESE SESSE SSSW SWWSW W WNW NWNNWSUBTOTAL0.0450.0780.1200.082 0.0400.0230.014 0.0340.0480.060 0.041 0.0290.0240.018 0.0260.0200.7020.3390.5030.8190.538 0.5380.2920.140 0.2340.4330.409 0.3510.2110.2570.222 0.2690.2225.7781.2632.2343.4152.351 0.8770.5030.351 0.9821.2511.696 1.099 0.8070.5960.409 0.6550.49118.9821.1582.1402.4331.076 0.5730.2110.316 0.5731.1932.678 1.719 0.8190.3860.456 0.6320.65517.0181.2871.7311.3800.690 0.3160.1050.152 0.1870.7252.363 2.012 0.5730.3510.468 0.9120.90114.1524.0233.1581.9880.620 0.1750.0580.222 0.6901.1815.170 3.392 0.9241.0641.485 2.0352.18728.3740.7720.4090.2690.082 0.0230.0000.2110.5380.8073.860 1.813 0.5260.6200.8190.7840.95912.4910.0120.0000.0000.000 0.0000.0000.094 0.0350.3630.912 0.409 0.1050.0820.094 0.0470.0352.1870.0000.0000.0000.000 0.0000.0000.000 0.0000.0700.082 0.058 0.0230.0350.023 0.0120.0120.316 8.89910.25310.424 5.439 2.543 1.192 1.499 3.274 6.07117.229 10.895 4.017 3.416 3.995 5.371 5.482100.000Total Hours Of Valid Wind Observations8550Total Hours Of Observations8928Recoverability Percentage95.8Meteorological Facility Located 0.8 KM S Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 7.34 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-46WATTS BAR WBNP-63Table 2.3-23 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantApril (74-88)WindWind Speed (MPH)

Direction Calm0.6-1.41.5-3.43.5-5.45.5-7.47.5-12.412.5-18.418.5-24.4>=24.5Total NNNE NE ENE E ESE SE SSE S SSW SW WSW WWNW NW NNW SUBTOTAL0.0410.0420.0560.093 0.0720.0280.033 0.0520.0670.083 0.085 0.0930.0860.069 0.0870.0631.0520.6560.5690.7621.158 1.1770.5790.704 0.7141.0230.907 1.283 1.7941.6011.688 1.8041.22517.644 0.994 1.148 1.524 2.614 1.756 0.560 0.627 1.399 1.688 2.479 2.180 1.987 1.8911.119 1.708 1.33125.0051.2541.9681.0801.023 0.8780.3570.424 0.7141.5053.126 1.457 0.7720.7720.637 0.7430.80117.509 1.254 1.650 1.177 0.627 0.299 0.029 0.135 0.318 0.839 3.454 0.888 0.367 0.637 0.502 0.762 0.82013.7571.6112.2280.8390.309 0.0680.0100.058 0.3280.9946.174 0.801 0.6661.2641.4371.6111.55319.9500.1540.1830.0100.000 0.0000.0000.000 0.1640.5981.978 0.232 0.2120.3090.2600.2800.1354.5150.0000.0000.0000.000 0.0000.0000.000 0.0100.1060.376 0.048 0.0190.0100.000 0.0000.0000.5690.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.000 0.0000.0000.000 0.0000.0000.0005.9647.7895.4495.823 4.2491.5621.982 3.6996.82018.5776.973 5.9106.5695.713 6.9945.928100.000Total Hours Of Valid Wind Observations10366Total Hours Of Observations10800Recoverability Percentage96.0Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 5.08 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-47WATTS BAR WBNP-63Table 2.3-24 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantApril (77-88)WindWind Speed (MPH)WindDirection Calm0.6-1.41.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total NNNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NWNNW SUBTOTAL0.0440.0850.1280.1170.0450.0260.021 0.0490.0800.106 0.069 0.0440.0390.026 0.0350.0280.9430.3350.5330.7440.732 0.3970.2110.149 0.3720.5210.484 0.385 0.3600.3850.273 0.2730.2856.4390.8811.7992.7672.469 0.8440.5090.434 0.9681.6632.419 1.514 0.8560.6950.447 0.6950.49619.4540.9061.6501.7000.955 0.5830.3470.434 0.8441.6253.337 1.762 0.8190.6330.509 0.4710.58317.1590.8441.7621.3280.769 0.3470.1360.186 0.2481.0423.437 1.762 0.6950.4470.372 0.8060.64514.8262.5812.6431.6870.682 0.2980.0370.099 0.4590.9685.943 3.189 1.1911.2281.737 1.8611.86126.4640.5460.6330.1610.012 0.0000.0000.025 0.2730.5714.007 1.613 0.7070.8561.241 0.5580.80612.0100.0120.0120.0000.000 0.0000.0000.0000.1120.2360.893 0.409 0.2730.0990.037 0.0870.0502.2210.0000.0000.0000.000 0.0000.0000.000 0.0000.0870.2110.074 0.0870.0250.000 0.0000.0000.4846.1489.1178.5155.737 2.5141.2671.349 3.3246.79220.838 10.7765.0324.4074.642 4.7874.756100.000Total Hours Of Valid Wind Observations8060Total Hours Of Observations8640Recoverability Percentage 93.3Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 7.17 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-48WATTS BAR WBNP-63Table 2.3-25 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class , Watts Bar Nuclear PlantMay (74-88)WindWind Speed (MPH)

DirectionCalm0.6-1.41.5-3.43.5-5.45.5-7.47.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW SUBTOTAL0.0560.0500.0690.1150.0950.0360.056 0.0910.1200.1490.1120.1200.1250.0840.1180.0791.475 0.670 0.421 0.642 1.025 1.369 0.603 0.958 1.178 1.226 1.494 1.513 2.269 2.375 1.599 2.164 1.41720.9231.2931.3211.7913.026 1.9820.6701.025 2.0012.9783.725 2.432 1.9342.0011.341 1.9731.36930.8631.6951.7521.8001.446 0.8910.3060.622 0.8142.1644.376 1.695 0.4790.6220.613 0.5460.75620.5781.2351.6761.0920.776 0.2680.0290.134 0.1631.0153.476 0.929 0.3350.4400.440 0.4600.47912.9461.1781.7620.9480.354 0.0380.0190.057 0.1921.0443.581 0.718 0.1530.3350.393 0.6890.76612.2280.0480.0570.0000.010 0.0100.0000.000 0.0000.1820.5270.067 0.0190.0190.000 0.0190.0190.977 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.010 0.000 0.000 0.000 0.000 0.000 0.000 0.0100.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.000 0.0000.0000.000 0.0000.0000.000 6.175 7.040 6.341 6.751 4.654 1.664 2.853 4.438 8.72817.337 7.467 5.310 5.918 4.469 5.969 4.886100.000Total Hours Of Valid Wind Observations10443Total Hours Of Observations11160Recoverability Percentage93.6Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 4.00 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-49WATTS BAR WBNP-63Table 2.3-26 Joint Percentage Frequencies Of Wind SpeedBy Wind Direction Disregarding Stability Class , Watts Bar Nuclear PlantMay (77-88)WindWind Speed (MPH)

DirectionCalm0.6-1.41.5-3.43.5-5.45.5-7.47.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW WWNW NW NNWSUBTOTAL0.0520.1080.1610.135 0.0670.0330.033 0.0710.1150.136 0.083 0.0590.0470.036 0.0330.0411.2090.4370.8521.2551.025 0.6910.2420.288 0.6220.6450.714 0.507 0.5870.4490.437 0.3220.4039.4751.0942.3143.4542.924 1.2660.7140.691 1.4512.7293.258 1.923 1.1280.9330.610 0.6560.79425.9381.0251.9692.3491.255 0.6790.4950.461 0.8632.1074.432 2.233 0.7020.4490.391 0.4720.64520.5271.1631.7041.3010.817 0.2530.0580.207 0.1731.1863.408 2.107 0.5410.3110.368 0.4720.58714.6561.8772.5101.5310.829 0.1500.0580.1610.3111.2325.584 2.821 0.8060.6790.702 0.8521.01321.1140.4490.4140.1040.058 0.0000.0120.000 0.0920.5072.752 0.840 0.2420.1960.173 0.2990.2076.344 0.012 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.069 0.461 0.138 0.035 0.000 0.000 0.000 0.000 0.7140.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.023 0.000 0.0000.0000.000 0.0000.0000.0236.1089.87110.1547.042 3.1061.6101.841 3.5828.58920.766 10.6524.1003.0642.718 3.1073.690100.000Total Hours Of Valid Wind Observations8686Total Hours Of Observations8928Recoverability Percentage97.3Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 5.68 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-50WATTS BAR WBNP-63Table 2.3-27 Joint Percentage Frequencies Of Wind SpeedBy Wind Direction Disregarding Stability Class , Watts Bar Nuclear PlantJune (74-88)WindWind Speed (MPH)

Direction Calm0.6-1.41.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNWSUBTOTAL0.0500.0460.0550.108 0.1040.0400.0720.1150.1750.222 0.178 0.1650.1420.125 0.1440.0811.8220.3870.3870.4060.802 1.1230.5570.934 1.3501.4441.378 1.907 2.2562.2281.954 2.4351.18020.7291.0380.9251.1522.256 1.8310.5661.1141.9073.5304.937 3.162 2.4351.7931.595 1.6521.11431.0082.0111.6711.0671.557 0.6140.1980.453 0.7552.5585.560 2.218 0.5100.6420.632 0.5380.84021.824 1.218 1.624 0.651 0.491 0.208 0.057 0.047 0.245 1.303 4.219 1.057 0.227 0.415 0.680 0.576 0.68013.696 1.152 2.096 0.538 0.170 0.019 0.028 0.000 0.094 0.727 3.426 0.359 0.085 0.227 0.406 0.444 0.52910.2980.0570.2170.0000.009 0.0000.0090.009 0.0000.0280.198 0.009 0.0000.0190.0090.0190.0380.623 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0000.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.000 0.0000.0000.000 0.0000.0000.0005.9126.9653.8685.394 3.8991.4552.630 4.4669.76519.9418.891 5.6785.4655.402 5.8084.461100.000Total Hours Of Valid Wind Observations10594Total Hours Of Observations10800Recoverability Percentage98.1Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 3.78 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-51WATTS BAR WBNP-63Table 2.3-28 Joint Percentage Frequencies Of Wind SpeedBy Wind Direction Disregarding Stability Class , Watts Bar Nuclear PlantJune (77-88)WindWind Speed (MPH)Direction Calm0.6-1.41.5-3.43.5-5.45.5-7.47.5-12.412.5-18.418.5-24.4>=24.5Total NNNE NE ENE E ESE SE SSE S SSW SWWSW W WNW NWNNWSUBTOTAL0.0930.1490.2120.193 0.0990.0490.066 0.1260.2060.231 0.127 0.0800.0500.062 0.0470.0501.840 0.649 0.826 1.380 1.050 0.826 0.366 0.484 0.684 0.967 0.779 0.613 0.413 0.378 0.625 0.401 0.38910.8311.1212.0172.6662.643 1.0620.5660.767 1.7232.9733.622 1.817 1.1210.5780.566 0.4960.56624.3041.2512.0531.8171.286 0.6020.3420.531 1.0382.5726.571 2.572 0.7790.3300.354 0.3540.56623.0181.4161.7581.0030.790 0.2120.0830.047 0.2951.2274.943 2.194 0.4010.3660.472 0.4480.55516.2102.3242.6901.1680.437 0.1530.0470.035 0.1890.9086.041 2.926 0.7080.6020.802 0.6720.84920.5520.2830.4840.0240.012 0.0000.0000.012 0.0120.0711.215 0.519 0.1060.0710.071 0.0590.1423.0790.012 0.0120.0120.000 0.0000.0120.000 0.0000.0120.047 0.012 0.0000.0240.000 0.0120.0000.1530.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.012 0.000 0.0000.0000.000 0.0000.0000.0127.1489.9888.2826.4112.9541.4651.941 4.0678.93723.461 10.7813.6082.3982.953 2.4893.118100.000Total Hours Of Valid Wind Observations8476Total Hours Of Observations8640Recoverability Percentage98.1Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 5.14 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-52WATTS BAR WBNP-63Table 2.3-29 Joint Percentage Frequencies Of Wind SpeedBy Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantJuly (74-88)WindWind Speed (MPH)

Direction Calm0.6-1.41.5-3.43.5-5.45.5-7.47.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW SUBTOTAL0.0370.0320.0380.073 0.0660.0340.059 0.1040.1310.156 0.140 0.1240.1100.099 0.1070.0601.371 0.475 0.393 0.393 0.621 0.950 0.484 0.850 1.407 1.444 1.462 1.672 2.266 2.120 2.019 2.166 1.24319.9651.0780.9411.1792.421 1.7910.9141.617 2.9154.0025.016 4.139 2.8602.4312.102 2.2571.23436.8971.3431.7541.6631.626 0.9960.4570.685 1.0692.8425.720 1.919 0.5670.5670.694 0.4840.74923.1360.8681.7451.1060.731 0.2100.0730.073 0.2281.0053.390 0.768 0.1740.3840.356 0.3930.61212.116 0.329 1.188 0.375 0.155 0.073 0.000 0.046 0.164 0.621 1.9280.311 0.091 0.238 0.192 0.274 0.338 6.3230.0000.0270.0090.000 0.0000.0000.009 0.0000.0180.101 0.000 0.0000.0000.0090.0090.0090.1920.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.000 0.0000.0000.000 0.0000.0000.0000.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.000 0.0000.0000.000 0.0000.0000.0004.1316.0814.7625.629 4.0871.9623.340 5.88810.06417.7738.949 6.0815.8485.472 5.6904.245100.000Total Hours Of Valid Wind Observations10944Total Hours Of Observations11160Recoverability Percentage98.1Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 3.43 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-53WATTS BAR WBNP-63Table 2.3-30 Joint Percentage Frequencies Of Wind SpeedBy Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantJuly (77-88)WindWind Speed (MPH)DirectionCalm0.6-1.41.5-3.43.5-5.45.5-7.47.5-12.412.5-18.418.5-24.4>=24.5Total NNNE NE ENE E ESE SE SSE SSSW SWWSW W WNW NWNNW SUBTOTAL0.0750.1030.1440.123 0.0670.0310.048 0.0970.1480.187 0.101 0.0540.0470.039 0.0410.0411.3460.7250.8971.3460.943 0.6670.2880.299 0.5520.8050.782 0.495 0.5520.4370.472 0.4260.41410.0981.4382.0702.8182.622 1.2650.6211.081 2.2543.4734.623 2.427 1.0240.9320.667 0.7480.78228.8441.1271.7941.8751.622 0.8860.4830.794 1.2542.8186.786 3.036 0.9780.7250.368 0.5060.50625.5550.9892.1051.4381.127 0.4720.1380.207 0.2301.1504.6692.1160.5180.4140.414 0.3800.49516.8600.9892.1741.0350.472 0.0810.0810.058 0.1841.0474.566 2.082 0.4600.4600.575 0.4030.67915.3420.0460.1610.0120.035 0.0000.0000.035 0.0350.0810.690 0.391 0.1040.0920.0350.1150.0121.8400.0000.0120.0000.000 0.0000.0000.000 0.0000.0000.058 0.012 0.0120.0000.012 0.0000.0120.1150.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.000 0.0000.0000.000 0.0000.0000.0005.3889.3158.6666.943 3.4371.6422.520 4.6059.52122.360 10.6593.7003.1072.581 2.6172.940100.000Total Hours Of Valid Wind Observations8695Total Hours Of Observations8928Recoverability Percentage97.4Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 4.72 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-54WATTS BAR WBNP-65Table 2.3-31 Joint Percentage Frequencies Of Wind SpeedBy Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantAugust (74-88)WindWind Speed(MPH)

DirectionCalm0.6-1.41.5-3.43.5-5.45.5-7.47.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNWSUBTOTAL0.0560.0380.0520.102 0.0730.0290.048 0.0960.1430.166 0.134 0.1260.1080.101 0.1370.0821.4900.6710.3030.3860.7911.0110.4320.680 1.2321.5171.674 1.857 2.3452.3172.271 2.9891.46221.940 1.526 1.186 1.664 3.237 1.857 0.708 1.223 2.5384.110 4.855 3.402 2.621 1.931 1.701 2.418 1.76636.745 1.949 1.775 1.278 1.913 0.956 0.340 0.543 1.140 3.338 4.754 1.315 0.441 0.340 0.451 0.478 0.64421.6551.2142.1330.8640.561 0.1380.0090.129 0.3131.2053.034 0.349 0.0830.2020.101 0.2570.64411.2370.8371.6370.5150.248 0.0460.0000.120 0.1470.7541.830 0.092 0.0090.0180.046 0.1010.4146.814 0.018 0.037 0.009 0.000 0.000 0.000 0.000 0.000 0.009 0.028 0.000 0.000 0.000 0.000 0.009 0.009 0.120 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0000.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.000 0.0000.0000.000 0.0000.0000.0006.2727.1094.7696.852 4.0821.5192.743 5.46611.07616.3407.150 5.6254.9174.671 6.3905.020100.000Total Hours Of Valid Wind Observations10875Total Hours Of Observations11160Recoverability Percentage97.4Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 3.36 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-55WATTS BAR WBNP-63Table 2.3-32 Joint Percentage Frequencies Of Wind SpeedBy Wind Direction Disregarding Stability Class , Watts Bar Nuclear PlantAugust (77-88)Wind Wind Speed (MPH)

Direction Calm0.6-1.41.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total NNNE NE ENE E ESE SE SSE SSSW SWWSW W WNW NWNNWSUBTOTAL 0.090 0.147 0.218 0.185 0.100 0.051 0.0560.111 0.204 0.262 0.129 0.062 0.047 0.045 0.065 0.058 1.8300.5860.9811.2921.160 0.9810.4670.455 0.7421.0410.933 0.634 0.4550.4430.383 0.5860.53811.6751.5192.4763.8283.194 1.3760.7420.849 1.8543.7445.215 2.404 1.0050.6700.670 0.9330.81331.292 1.172 1.950 2.022 2.093 0.801 0.562 0.5141.112 3.254 6.328 2.416 0.694 0.287 0.335 0.359 0.69424.5931.1602.1651.2440.945 0.2390.0840.156 0.5021.4714.593 1.495 0.2630.1440.227 0.2390.47815.4071.8302.4280.9570.586 0.1440.0480.156 0.2511.1123.888 1.148 0.1910.1790.120 0.2870.59813.923 0.156 0.108 0.060 0.036 0.012 0.012 0.012 0.024 0.048 0.455 0.156 0.036 0.012 0.012 0.084 0.048 1.2680.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.012 0.000 0.0000.0000.000 0.0000.0000.0120.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.000 0.0000.0000.000 0.0000.0000.0006.51310.2559.6208.200 3.6531.9652.197 4.59610.87421.6858.383 2.7061.7821.791 2.5533.227100.000Total Hours Of Valid Wind Observations8360Total Hours Of Observations8928Recoverability Percentage93.6Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 4.41 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-56WATTS BAR WBNP-63Table 2.3-33 Joint Percentage Frequencies Of Wind SpeedBy Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantSeptember (74-88) WindWind Speed (MPH)

Direction Calm0.6-1.41.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW SUBTOTAL0.0830.0620.0720.1110.0700.0230.035 0.0700.1240.125 0.109 0.1080.1300.150 0.1970.1271.5960.8890.6210.5450.879 0.7740.2490.363 0.8221.3381.204 1.453 1.9602.6193.221 4.1302.18923.2581.9601.5201.9502.954 1.6250.5350.841 1.5872.9353.088 2.304 1.7681.8641.960 2.6382.18031.7082.3232.6482.4571.558 0.8320.1720.258 0.7072.0843.872 1.157 0.3250.2680.507 0.5741.14720.8871.6822.3521.4820.421 0.1050.0290.086 0.2291.1952.753 0.344 0.0570.2290.249 0.4010.78412.3981.2623.2311.0520.163 0.0480.0290.019 0.0760.8411.587 0.096 0.0100.0570.134 0.3350.9659.9030.0190.0760.0190.000 0.0000.0000.019 0.0000.0290.076 0.000 0.0000.0000.000 0.0000.0000.239 0.000 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 0.0100.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.000 0.0000.0000.000 0.0000.0000.0008.21810.5117.5866.086 3.4541.0361.622 3.4928.54612.7055.462 4.2285.1686.221 8.2747.392100.000Total Hours Of Valid Wind Observations10461Total Hours Of Observations10800Recoverability Percentage96.9Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 3.62 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-57WATTS BAR WBNP-63Table 2.3-34 Joint Percentage Frequencies Of Wind SpeedBy Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantSeptember (77-88)WindWind Speed(MPH)

DirectionCalm0.6-1.41.5-3.43.5-5.45.5-7.47.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNWSUBTOTAL0.0860.1550.2470.2110.0950.0520.0610.1110.1700.208 0.108 0.0620.0480.051 0.0570.0591.780 0.602 0.999 1.524 1.498 1.191 0.627 0.551 0.845 0.948 1.076 0.743 0.410 0.474 0.448 0.525 0.57613.0361.3322.4844.0343.253 0.9600.5380.820 1.6652.8813.6111.690 0.9860.6150.692 0.7680.75627.0841.5372.6513.2401.626 0.4740.4230.269 0.9602.1134.444 1.793 0.6020.3330.269 0.4100.65321.7951.5882.9071.9590.820 0.1920.0640.102 0.2820.9483.573 1.447 0.2560.1410.231 0.2950.60215.4052.8433.8932.2280.576 0.0640.0510.077 0.3201.1653.714 1.268 0.1280.2310.448 0.5381.16518.7090.1790.5890.1540.026 0.0000.0130.038 0.0000.1150.756 0.026 0.0260.0130.0130.0000.1282.0750.0000.0000.0000.000 0.0000.0000.013 0.0000.0130.090 0.000 0.0000.0000.000 0.0000.0000.1150.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.000 0.0000.0000.000 0.0000.0000.0008.16613.67713.3858.009 2.9771.7681.930 4.1848.35317.4707.074 2.4691.8542.151 2.5933.939100.000Total Hours Of Valid Wind Observations7809Total Hours Of Observations8640Recoverability Percentage 90.4Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 4.80 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-58WATTS BAR WBNP-63Table 2.3-35 Joint Percentage Frequencies Of Wind SpeedBy Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantOctober (74-88)Wind Wind Speed (MPH)

Direction Calm0.6-1.41.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW SUBTOTAL0.1330.1090.1190.189 0.0990.0300.048 0.1020.1510.174 0.145 0.1890.2350.256 0.3640.1812.5261.0930.8180.7901.406 0.9370.3400.533 0.8361.0291.102 1.323 1.9292.9123.721 4.6952.06725.5311.7821.5531.8012.701 1.2220.3120.514 1.3782.2512.683 1.828 2.1772.1861.837 3.1971.86529.2881.8742.3611.9021.415 0.4690.0830.101 0.3121.7643.197 0.983 0.4590.4690.671 0.7261.22218.0061.8932.0851.2310.404 0.1470.0000.064 0.1840.8272.398 0.496 0.1750.3030.606 0.5240.81812.1542.1412.2600.8180.156 0.0920.0280.037 0.0830.5972.251 0.220 0.1010.4230.661 0.7171.27711.8600.0460.1750.0000.000 0.0000.0000.000 0.0280.0830.202 0.009 0.0090.0000.028 0.0460.0090.6340.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.000 0.0000.0000.000 0.0000.0000.0000.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.000 0.0000.0000.000 0.0000.0000.0008.9619.3616.6616.271 2.9660.7931.298 2.9226.70112.0075.005 5.0406.5287.78010.2677.439100.000Total Hours Of Valid Wind Observations10885Total Hours Of Observations11160Recoverability Percentage97.5Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 3.69 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-59WATTS BAR WBNP-63Table 2.3-36 Joint Percentage Frequencies Of Wind SpeedBy Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantOctober (77-88)WindWind Speed (MPH)

DirectionCalm0.6-1.41.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Subtotal0.0820.1620.2260.250 0.1370.0650.064 0.1200.1820.213 0.124 0.0750.0720.044 0.0490.0481.9120.5240.7741.3201.502 1.6620.9560.717 1.0241.1610.933 0.774 0.4440.5580.330 0.4440.38713.5101.1612.5613.3463.665 1.1720.3760.603 1.4572.5953.460 1.776 1.1040.9220.580 0.5690.60325.9501.0022.6862.6291.093 0.3300.1710.137 0.5351.6964.086 1.593 0.6150.2730.364 0.4210.50118.1311.5932.4361.7870.774 0.1820.0110.057 0.1710.7973.517 1.389 0.4550.3070.433 0.5460.70615.1603.6542.9711.7300.3070.1140.0000.080 0.2850.7743.904 1.650 0.4210.6151.195 1.1381.73020.5670.5920.2160.0230.034 0.0230.0000.0110.0800.2731.559 0.387 0.1370.2050.3870.2050.4104.5410.0000.0000.0000.000 0.0000.0000.000 0.0000.0460.137 0.034 0.0000.0000.0110.0000.0000.2280.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.000 0.0000.0000.000 0.0000.0000.0008.60711.80511.0627.626 3.6201.5781.669 3.6717.52317.8097.727 3.2512.9513.345 3.3734.384100.000Total Hours Of Valid Wind Observations8786Total Hours Of Observations8928Recoverability Percentage98.4Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 5.18 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-60WATTS BAR WBNP-63Table 2.3-37 Joint Percentage Frequencies Of Wind SpeedBy Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantNovember (74-88)Wind Wind Speed (MPH)

Direction Calm0.6-1.41.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NEENE E ESE SE SSE S SSW SW WSW WWNW NW NNWSUBTOTAL 0.131 0.178 0.185 0.252 0.163 0.047 0.054 0.090 0.159 0.190 0.1590.211 0.262 0.2550.311 0.203 2.8500.9881.0170.9981.296 1.1710.4130.413 0.4890.6720.806 0.940 1.5452.2362.668 2.9851.99620.6331.3152.1112.2553.129 1.6890.4130.528 1.0942.1212.524 1.843 2.1502.3611.804 2.4661.57429.3761.6602.6011.7181.084 0.4410.0770.144 0.3741.1423.292 1.142 0.7490.7490.470 1.0651.08417.7931.4592.4761.1800.202 0.0190.0000.048 0.0960.6912.649 0.873 0.4610.7870.528 0.8541.15213.4741.6312.3510.4410.029 0.0100.0100.067 0.2400.7583.426 0.384 0.4220.9500.797 1.2001.33414.050 0.182 0.096 0.010 0.000 0.000 0.000 0.029 0.029 0.259 0.710 0.058 0.086 0.048 0.096 0.106 0.067 1.7750.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.048 0.000 0.0000.0000.000 0.0000.0000.0480.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.000 0.0000.0000.000 0.0000.0000.0007.36710.8316.7885.991 3.4930.9591.282 2.4135.80213.6455.399 5.6237.3936.618 8.9867.411100.000Total Hours Of Valid Wind Observations10420Total Hours Of Observations10800Recoverability Percentage96.5Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 4.11 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-61WATTS BAR WBNP-63Table 2.3-38 Joint Percentage Frequencies Of Wind SpeedBy Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantNovember (77-88) WindWind Speed (MPH)

DirectionCalm0.6-1.41.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4 >=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Subtotal0.0820.1380.2260.2090.1110.0440.051 0.0880.1320.160 0.087 0.0700.0560.036 0.0510.0671.606 0.591 0.886 1.146 1.299 1.122 0.614 0.602 0.626 0.661 0.650 0.579 0.378 0.472 0.307 0.449 0.47210.8551.2762.2804.0283.485 1.4170.3900.567 1.3942.3513.000 1.406 1.2280.8030.508 0.7091.05125.8920.9692.3152.9881.240 0.3310.0590.189 0.3781.2643.284 1.595 0.8270.3660.425 0.6020.54317.3751.1462.6581.9960.543 0.1060.0120.071 0.1540.6382.634 1.240 0.6850.4840.378 0.5670.54313.8553.1183.3311.9960.165 0.0000.0000.083 0.2240.8034.181 2.303 0.8501.0511.158 1.5711.84322.6790.7680.4610.1300.000 0.0000.0000.024 0.2010.5912.091 0.780 0.4250.3190.413 0.3780.3546.9340.0470.0120.0000.000 0.0000.0000.000 0.0120.1650.307 0.047 0.1420.0240.000 0.0000.0000.7560.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.024 0.012 0.0120.0000.000 0.0000.0000.0477.99612.08012.5116.942 3.0881.1191.587 3.0776.60516.3308.048 4.6183.5763.225 4.3274.874100.000Total Hours Of Valid Wind Observations8466Total Hours Of Observations8640Recoverability Percentage98.0Meteorological Facility Located 0.8 Km SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 5.75 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-62WATTS BAR WBNP-63Table 2.3-39 Joint Percentage Frequencies Of Wind SpeedBy Wind Direction Disregarding Stability Class, Watts Bar Nuclear PlantDecember (74-88)Wind Wind Speed (MPH)

Direction Calm0.6-1.41.5-3.43.5-5.45.5-7.47.5-12.412.5-18.418.5-24.4>=24.5 Total NNNE NE ENE EESE SESSE SSSW SWWSW W WNW NWNNWSubtotal0.0460.0560.0690.099 0.0530.0130.024 0.0510.0600.078 0.065 0.0920.0990.086 0.1250.0761.0920.6320.7470.9191.082 0.9190.2590.345 0.7850.5840.805 0.852 1.4461.8581.992 2.5091.59917.3361.3501.6672.0693.199 1.3790.2970.709 1.4082.0302.567 1.983 2.5482.4231.724 2.9211.69529.9681.4752.0111.6280.9480.2110.0290.134 0.2491.2454.023 1.552 0.9581.0340.575 0.9191.00617.9961.5801.9160.8330.220 0.0380.0000.029 0.0670.6133.410 0.939 0.6610.9670.862 1.0341.29314.4622.2122.3470.6700.029 0.0000.0000.019 0.0770.6323.965 0.642 0.4311.2641.178 1.6191.88716.9720.0770.1820.0000.000 0.0100.0000.010 0.0380.2010.632 0.086 0.0860.1340.153 0.1630.1821.954 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048 0.163 0.000 0.000 0.000 0.010 0.000 0.000 0.2200.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.000 0.0000.0000.000 0.0000.0000.0007.3738.9256.1895.577 2.6100.5971.269 2.6755.41415.6416.1186.2227.7806.579 9.2917.738100.000Total Hours Of Valid Wind Observations10441Total Hours Of Observations11160Recoverability Percentage93.6Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 4.50 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-63WATTS BAR WBNP-63Table 2.3-40 Joint Percentage Frequencies Of Wind SpeedBy Wind Direction Disregarding Stability Class , Watts Bar Nuclear PlantDecember (77-88)WindWind Speed (MPH)Direction Calm0.6-1.41.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNWSubtotal0.0510.0720.1060.096 0.0530.0280.027 0.0470.0860.1130.063 0.0430.0330.031 0.0280.0300.9080.5240.5240.7330.722 0.8380.4890.338 0.5240.5590.570 0.454 0.3960.3030.431 0.3490.3618.1121.1521.8622.7702.456 0.9190.4540.570 1.0362.2933.177 1.641 1.0130.7910.582 0.5820.64021.9391.2222.4212.6650.919 0.2440.0700.163 0.3141.2803.678 1.851 0.9080.5000.431 0.5240.67517.8651.1992.2351.7570.349 0.0000.0120.023 0.1050.6403.212 1.699 0.7220.4420.594 0.7450.79114.5253.8523.4571.5010.163 0.0000.0000.035 0.1510.6874.609 3.305 1.1411.2922.037 1.9902.43226.6530.8030.5120.1860.000 0.0120.0000.023 0.0470.3962.828 0.954 0.4070.3490.640 0.6400.8388.6360.0700.0470.0000.000 0.0000.0000.012 0.0120.0930.512 0.163 0.1050.0580.093 0.0350.0351.2340.0000.0000.0000.000 0.0000.0000.000 0.0000.0120.058 0.023 0.0230.0000.000 0.0120.0000.1288.87311.1299.7194.705 2.0671.0531.191 2.2356.04518.758 10.1544.7563.7694.837 4.9055.803100.000Total Hours Of Valid Wind Observations8592Total Hours Of Observations8928Recoverability Percentage96.2Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantWind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 6.45 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-64METEOROLOGYWATTS BARWBNP-63THIS PAGE INTENTIONALLY BLANK METEOROLOGY2.3-65WATTS BARWBNP-63All columns and calm total 100 percent of net valid observations, which represent 91 percent of total record. *Watts Bar temporary meteorological facility. Wind instrument s 10 meters aboveground.**Wind speed class 1-3 mph includes values 0.6-3.5 mph; class 4-7 mph includes values 3.6-7.5 mph; etc.Table 2.3-41 Percent Occurrence Of Wind Speed* For All Wind DirectionsJuly 1, 1971 - June 28, 1972 AnnualWindWind Speed (MPH)**

Direction1-34-78-1213-18> 19TotalN4.331.070.140.03-5.57NNE4.162.110.290.01-6.57NE5.264.120.49--9.87ENE3.902.070.230.01-6.21E1.640.500.04--2.18ESE1.110.450.25--1.81SE1.720.500.33--2.55SSE2.270.810.16--3.24S2.942.830.680.15-6.60SSW2.544.691.800.33-9.36SW2.543.080.620.04-6.28WSW2.071.080.200.03-3.38W2.181.261.020.09-4.55WNW2.381.210.900.01-4.50NW4.971.740.730.06-7.50 NNW 5.71 2.13 0.290.05-8.18Total49.7229.658.170.81-88.35Calm = 11.64

METEOROLOGY2.3-66WATTS BARWBNP-63*Inversion Conditions Distributed Within Total Hours With Valid Vertical Temperature Difference Data. Stability Classes Distributed Within Total Hours With Valid Wind Direction, Wind Speed, And Vertical Temperature Difference Data.Meteorological Facility Located 0.8 Km Ssw Of Watts Bar Nuclear Plant. Temperature Difference Between 9.51 And 45.63 Meters And Wind Direction And Wind Speed At 9.72 Meter Level.Table 2.3-42 Percent Occurrences Of Inversion Conditions And Pasquill Stability Classes A-G

  • Watts Bar Nuclear PlantJan 1, 74 - Dec 31, 88 STABILITY CLASS INVERSIONSABCDEFGJANUARY29.52.22.14.647.527.411.15.0 FEBRUARY34.03.53.65.842.323.812.28.9 MARCH36.64.94.06.536.924.312.111.2 APRIL39.85.14.17.732.722.513.014.9 MAY40.24.13.87.233.526.117.08.3 JUNE40.95.34.88.631.026.717.56.1 JULY38.74.84.38.532.829.116.04.5 AUGUST39.64.84.07.631.932.716.32.8SEPTEMBER40.54.94.56.831.930.517.63.9OCTOBER43.83.93.76.632.724.320.58.3 NOVEMBER40.31.62.14.739.327.114.910.3 DECEMBER37.51.61.85.042.027.414.18.1 ANNUAL38.53.93.66.636.226.915.27.6 METEOROLOGY2.3-67WATTS BARWBNP-63Table 2.3-43 Deleted By Amendment 63 METEOROLOGY2.3-68WATTS BARWBNP-63Table 2.3-44 Inversion Persistence DataWatts Bar Nuclear PlantJan 1, 74 - Dec 31, 88 (Delta-T Given In Degrees Celsius) (Sheet 1 of 2)

DISREGARDING INVERSION NO. HOURS E0.0<DELTA-T<=1.5 F1.5<DELTA-T<=4.0 GDELT A-T>4.0 F AND GDELT A-T>1.5 STRENGTHDELTA-T>0.0 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 281522 748 533 359 249 170 107 63 53 45 30 16 6 4 1 1 0 0 0 0 0 0 0 0 0 0 0835535453 384374296 203174112 97 48 22 14 3 1 0 0 1 0 0 0 0 0 0 0 0 0390242218 200146113 76 92 70 70 41 29 21 4 1 0 0 0 0 0 0 0 0 0 0 0 0 289 238 234 206 246 226 227 262 300 352 300 271 157113 35 6 1 2 1 1 0 0 0 0 0 0 0 631 423 302 252 241 208 190 206 230 336 591 543 421 334 185 74 17 7 0 1 0 0 0 0 0 0 0 29 30 31 32>=32 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2*

METEOROLOGY2.3-69WATTS BARWBNP-63Meteorological Facility Located 0.8 Km SSW Of Watts Bar Nuclear Plant Temperature Instruments Located 45.63 And 9.51 Meters Above Ground *January 1982 TOTAL39073552171334675193 Maximum Hours of Persistence 17 19 162145Table 2.3-44 Inversion Persistence DataWatts Bar Nuclear PlantJan 1, 74 - Dec 31, 88 (Delta-T Given In Degrees Celsius) (Continued) (Sheet 2 of 2)

DISREGARDING INVERSION NO. HOURS E0.0<DELTA-T<=1.5 F1.5<DELTA-T<=4.0 GDELT A-T>4.0 F AND GDELT A-T>1.5 STRENGTHDELTA-T>0.0 METEOROLOGY2.3-70WATTS BARWBNP-63Table 2.3-45 Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class A (Delta T<=-1.9 C/100 M), Watts Bar Nuclear PlantJan 1, 74 - Dec 31, 88 WindWind Speed (MPH)DirectionCalm0.6-1.4 1.5-3.4 3.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNWSUBTOTAL 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.001 0.001 0.000 0.001 0.002 0.000 0.001 0.001 0.001 0.001 0.000 0.000 0.000 0.000 0.000 0.001 0.009 0.009 0.009 0.030 0.028 0.031 0.014 0.015 0.030 0.037 0.032 0.009 0.005 0.003 0.001 0.003 0.005 0.2620.0200.063 0.0770.0670.0370.0110.0260.047 0.1030.1670.067 0.0200.0100.005 0.0060.0240.747 0.030 0.077 0.074 0.080 0.019 0.002 0.005 0.0200.112 0.3880.113 0.015 0.012 0.0080.011 0.040 1.0060.0670.156 0.0920.0370.006 0.0010.0020.016 0.1210.7440.120 0.0720.0600.028 0.0290.0681.618 0.003 0.006 0.000 0.000 0.000 0.000 0.001 0.002 0.015 0.130 0.015 0.025 0.019 0.007 0.008 0.013 0.2440.0000.000 0.0000.0000.000 0.0000.0000.000 0.0010.0070.000 0.0020.0010.000 0.0000.0000.011 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 0.0000.1290.3110.2730.2130.095 0.0280.0500.1170.3911.4680.323 0.1390.1050.049 0.0570.1513.898Total Hours Of Valid Stability Observations125417Total Hours Of Stability Class A4884Total Hours Of Valid Wind Direction-Wind Speed-Stability Class A4789 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations 122869Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantStability Based On Delta-T Between 9.51 And 45.63 MetersWind Speed And Direction Measured At 9.72 Meter LevelMean Wind Speed = 7.57Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-71WATTS BARWBNP-63Table 2.3-46 Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class B (-1.9< Delta T<=-1.7 C/100 M), Watts Bar Nuclear PlantJan 1, 74 - Dec 31, 88WindWind Speed (MPH) DirectionCalm0.6-1.41.5-3.4 3.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNWSubtotal 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0000.0000.001 0.0000.0010.001 0.0020.0000.001 0.0020.0000.000 0.0000.0000.000 0.0000.0000.007 0.015 0.037 0.051 0.045 0.055 0.018 0.023 0.042 0.043 0.047 0.020 0.007 0.003 0.005 0.007 0.009 0.4250.0510.1030.1120.0960.061 0.0240.0290.0500.1150.1760.088 0.0190.0090.005 0.0150.0310.984 0.046 0.124 0.107 0.077 0.019 0.002 0.003 0.017 0.072 0.296 0.093 0.026 0.024 0.013 0.015 0.034 0.9690.0800.203 0.0850.0290.002 0.0010.0020.007 0.0610.2570.033 0.0250.0560.056 0.0610.0811.040 0.007 0.015 0.002 0.000 0.000 0.000 0.002 0.0000.011 0.049 0.004 0.0080.011 0.008 0.007 0.009 0.1330.0000.000 0.0000.0000.000 0.0000.0000.000 0.0020.0040.000 0.0000.0010.000 0.0020.0010.010 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 0.199 0.483 0.357 0.248 0.137 0.047 0.0590.116 0.306 0.829 0.238 0.085 0.104 0.087 0.107 0.165 3.568Total Hours Of Valid Stability Observations125417Total Hours Of Stability Class B4466Total Hours Of Valid Wind Direction-Wind Speed-Stability Class B4384Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations122869Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant Stability Based On Delta-T Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 6.61 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-72WATTS BARWBNP-63Table 2.3-47 Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class C (-1.7< Delta T<=-1.5 C/100 M), Watts Bar Nuclear PlantJan 1, 74 - Dec 31, 88WindWind Speed (MPH)DirectionCalm0.6-1.4 1.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Subtotal 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.001 0.002 0.000 0.003 0.001 0.000 0.001 0.001 0.000 0.001 0.000 0.001 0.000 0.000 0.0000.011 0.037 0.0940.118 0.109 0.109 0.042 0.049 0.088 0.106 0.085 0.046 0.024 0.020 0.012 0.022 0.024 0.9860.0940.214 0.2250.1810.152 0.0460.0580.123 0.2420.4200.181 0.0630.0310.020 0.0430.0662.1600.118 0.238 0.168 0.098 0.027 0.0040.011 0.037 0.122 0.430 0.120 0.040 0.053 0.037 0.057 0.092 1.651 0.168 0.300 0.138 0.033 0.007 0.000 0.002 0.013 0.081 0.305 0.046 0.028 0.070 0.120 0.161 0.137 1.6090.0090.022 0.0020.0010.001 0.0000.0030.004 0.0200.0750.009 0.0120.0130.016 0.0190.0110.2160.0000.000 0.0000.0000.000 0.0000.0000.000 0.0020.0060.000 0.0000.0030.000 0.0010.0000.011 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 0.0000.4270.868 0.6520.4230.299 0.0940.1220.266 0.5731.3200.403 0.1680.1910.205 0.3030.3306.644Total Hours Of Valid Stability Observations125417Total Hours Of Stability Class C8348Total Hours Of Valid Wind Direction-Wind Speed-Stability Class C8164 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations122869Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant Stability Based On Delta-T Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 9.72 Meter LevelMean Wind Speed = 6.20Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-73WATTS BARWBNP-63Table 2.3-48 Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class D (-1.5< Delta T<=-0.5 C/100 M), Watts Bar Nuclear PlantJan 1, 74 - Dec 31, 88WindWind Speed (MPH)Direction Calm 0.6-1.4 1.5-3.43.5-5.45.5-7.47.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNWSUBTOTAL0.0020.002 0.0030.0030.003 0.0010.0020.003 0.0040.0050.003 0.0020.0020.002 0.0020.0010.037 0.037 0.037 0.057 0.092 0.125 0.057 0.069 0.123 0.108 0.095 0.094 0.071 0.081 0.094 0.072 0.046 1.2600.4370.544 0.6480.8140.619 0.2320.3650.610 0.9411.1610.696 0.4780.4290.343 0.3540.3509.020 0.850 1.219 0.976 0.597 0.295 0.089 0.173 0.264 0.872 1.878 0.750 0.347 0.353 0.371 0.409 0.518 9.962 0.938 1.335 0.632 0.178 0.079 0.015 0.031 0.059 0.358 1.141 0.255 0.182 0.387 0.408 0.544 0.628 7.170 1.164 1.464 0.384 0.059 0.020 0.009 0.028 0.058 0.330 1.244 0.182 0.136 0.439 0.558 0.794 0.948 7.8160.0490.061 0.0080.0020.000 0.0000.0090.0210.1100.3000.022 0.0390.0550.061 0.0790.0500.8660.0000.000 0.0010.0000.000 0.0000.0000.002 0.0130.0280.002 0.0010.0030.004 0.0000.0000.054 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.0023.4774.663 2.7091.7451.140 0.4030.6771.139 2.7375.8512.005 1.2551.7511.842 2.2522.54236.187Total Hours Of Valid Stability Observations125417Total Hours Of Stability Class D45215Total Hours Of Valid Wind Direction-Wind Speed-Stability Class D44463 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations122869Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantStability Based On Delta-T Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 9.72 Meter LevelMean Wind Speed = 5.52Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-74WATTS BARWBNP-63Table 2.3-49 Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class E (-0.5< Delta T<= 1.5 C/100 M), Watts Bar Nuclear PlantJan 1, 74 - Dec 31, 88WindWind Speed (MPH) DirectionCalm 0.6-1.41.5-3.43.5-5.45.5-7.47.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW SUBTOTAL 0.0150.011 0.013 0.027 0.018 0.006 0.009 0.019 0.030 0.039 0.031 0.031 0.029 0.028 0.032 0.020 0.3600.1570.132 0.1390.2430.290 0.1350.1920.308 0.3820.4340.461 0.6050.6620.641 0.7190.3835.8820.5310.398 0.4711.0150.522 0.1470.2280.591 1.0161.3890.971 0.8240.6980.639 0.7530.553 10.746 0.639 0.466 0.239 0.337 0.101 0.032 0.046 0.122 0.475 1.145 0.306 0.186 0.229 0.203 0.255 0.3365.1160.2990.235 0.0980.0490.021 0.0090.0290.060 0.2220.7710.198 0.1080.1090.090 0.1220.1522.5730.0910.087 0.0380.0110.013 0.0020.0240.079 0.1870.8110.150 0.0810.0730.042 0.0580.0831.8320.0020.004 0.0000.0010.002 0.0010.0040.015 0.0620.1650.027 0.0140.0110.002 0.0020.0020.3140.0000.000 0.0000.0000.000 0.0000.0000.001 0.0090.0210.003 0.0010.0000.002 0.0000.0000.0370.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.0001.7341.334 0.9991.6830.966 0.3320.5321.195 2.3834.7762.147 1.8501.8111.646 1.9401.53026.859Total Hours Of Valid Stability Observations125417Total Hours Of Stability Class E33679Total Hours Of Valid Wind Direction-Wind Speed-Stability Class E33002 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations122869Meteorological Facility Located 0.8 K SSW Of Watts Bar Nuclear PlantStability Based On Delta-T Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 9.72 Meter LevelMean Wind Speed = 3.43Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-75WATTS BARWBNP-63Table 2.3-50 Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class F ( 1.5< Delta T<= 4.0 C/100 M), Watts Bar Nuclear PlantJan 1, 74 - Dec 31, 88WindWind Speed (MPH) Direction Calm 0.6-1.4 1.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNWSUBTOTAL0.0270.022 0.0280.0480.026 0.0080.0130.025 0.0320.0390.046 0.0640.0690.066 0.1040.0560.6720.2740.215 0.2380.3390.2920.1120.1680.281 0.3230.3500.440 0.6730.8430.918 1.2570.6807.4050.2690.238 0.3220.6360.228 0.0540.1000.226 0.3260.4430.497 0.6230.5570.432 0.8560.4576.2630.0320.033 0.0240.0650.009 0.0010.0040.020 0.0430.1920.075 0.0410.0330.024 0.0450.0340.6760.0080.001 0.0020.0020.001 0.0000.0010.003 0.0060.0730.019 0.0080.0010.002 0.0050.0050.1380.0010.001 0.0010.0020.001 0.0000.0000.002 0.0050.0150.007 0.0000.0020.001 0.0020.0000.040 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 0.001 0.000 0.0020.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.0000.6100.5110.6161.0930.556 0.1750.2870.558 0.7341.1121.085 1.4081.5051.443 2.2701.23115.194TOTAL HOURS OF VALID STABILITY OBSERVATIONS125417TOTAL HOURS OF STABILITY CLASS F19142TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F18669TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS122869METEOROLOGICAL FACILITY LOCATED 0.8 KM SSW OF WATTS BAR NUCLEAR PLANTSTABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVELMEAN WIND SPEED = 1.63NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS METEOROLOGY2.3-76WATTS BARWBNP-63Table 2.3-51 Joint Percentage Frequencies Of Wind Speed By Wind Direction ForStability Class G (Delta T > 4.0 C/100 M), Watts Bar Nuclear PlantJan 1, 74 - Dec 31, 88WindWind Speed (MPH) DirectionCalm 0.6-1.4 1.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW SUBTOTAL0.0210.022 0.0320.0570.030 0.0090.0170.021 0.0210.0240.029 0.0500.0560.046 0.0660.0370.5370.1940.194 0.2550.3840.276 0.0960.1630.190 0.1880.2010.248 0.4020.4380.420 0.5560.3264.5300.0770.101 0.1680.3630.1170.0270.0580.081 0.0900.1100.126 0.2560.2910.181 0.3080.1532.505 0.002 0.002 0.001 0.009 0.001 0.000 0.000 0.002 0.005 0.013 0.007 0.006 0.006 0.0040.011 0.003 0.0720.0000.000 0.0000.0000.000 0.0000.0000.000 0.0020.0020.000 0.0000.0000.000 0.0010.0000.004 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 0.0010.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.0000.0000.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.292 0.320 0.455 0.814 0.424 0.132 0.237 0.293 0.306 0.349 0.409 0.714 0.790 0.651 0.942 0.519 7.649TOTAL HOURS OF VALID STABILITY OBSERVATIONS125417TOTAL HOURS OF STABILITY CLASS G9683TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G9398TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS122869METEOROLOGICAL FACILITY LOCATED 0.8 KM SSW OF WATTS BAR NUCLEAR PLANTSTABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVELMEAN WIND SPEED = 1.30NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS METEOROLOGY2.3-77WATTS BARWBNP-63Table 2.3-52 Joint Percentage Frequencies Of Wind Speed By Stability Class , Watts Bar Nuclear PlantJan 1, 74 - Dec 31, 88WIND SPEEDSTABILITY CLASS (MPH) A B C D E F GCALM 0.0010.0000.0000.0370.3600.6720.5370.6-1.40.0090.0070.0111.2605.8827.4054.5301.5-3.40.2620.4250.9869.02010.7466.2632.5053.5-5.40.7470.9842.1609.9625.1160.6760.072 5.5-7.41.0060.9691.6517.1702.5730.1380.0047.5-12.41.6181.0401.6097.8161.8320.0400.00112.5-18.40.2440.1330.2160.8660.3140.0020.000 18.5-24.40.0110.0100.0110.0540.0370.0000.000>=24.50.0000.0000.0000.0020.0000.0000.000TOTAL 3.8983.5686.64436.18726.85915.1947.649TOTAL HOURS OF VALID STABILITY OBSERVATIONS125417TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS122869TOTAL HOURS OF OBSERVATIONS131496

JOINT RECOVERABILITY PERCENTAGE93.4METEOROLOGICAL FACILITY LOCATED 0.8 KM SSW OF WATTS BAR NUCLEAR PLANTSTABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL METEOROLOGY2.3-78WATTS BARWBNP-63Table 2.3-53 Joint Percentage Frequencies Of Wind Speed By Wind Direction ForStability Class A (Delta T<=-1.9 C/100 M), Watts Bar Nuclear PlantJan 1, 77 - Dec 31, 88WindWind Speed (Mph)Direction Calm0.6-1.41.5-3.4 3.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNWSUBTOTAL0.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.0010.0000.001 0.0020.0010.001 0.0010.0020.001 0.0000.0000.000 0.0010.0000.000 0.0010.0020.0130.0080.009 0.0300.0300.017 0.0130.0130.018 0.0300.0230.008 0.0050.0020.000 0.0010.0030.212 0.016 0.041 0.058 0.064 0.026 0.015 0.024 0.037 0.0670.117 0.061 0.008 0.003 0.003 0.0020.011 0.5530.0240.083 0.0870.0840.017 0.0040.0020.016 0.0550.1860.121 0.0140.0040.002 0.0020.0180.7190.0750.149 0.1270.0820.009 0.0030.0010.016 0.0900.6250.347 0.0500.0290.021 0.0170.0481.691 0.022 0.024 0.009 0.003 0.000 0.000 0.002 0.004 0.028 0.329 0.160 0.067 0.034 0.042 0.012 0.016 0.7530.001 0.000 0.0000.0000.000 0.0000.0000.002 0.0030.0540.023 0.0260.0030.002 0.0030.0010.118 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.009 0.0000.011 0.004 0.000 0.000 0.000 0.024 0.146 0.308 0.313 0.264 0.071 0.036 0.044 0.095 0.273 1.343 0.720 0.183 0.080 0.071 0.038 0.100 4.084TOTAL HOURS OF VALID STABILITY OBSERVATIONS101940TOTAL HOURS OF STABILITY CLASS A4112TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A4046 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS99059METEOROLOGICAL FACILITY LOCATED 0.8 KM SSW OF WATTS BAR NUCLEAR PLANTSTABILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS WIND SPEED AND DIRECTION MEASURED AT 46.36 METER LEVELMEAN WIND SPEED = 9.40NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS METEOROLOGY2.3-79WATTS BARWBNP-63Table 2.3-54 Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class B (-1.9< Delta T<=-1.7 C/100 M), Watts Bar Nuclear Plant Jan 1, 77 - Dec 31, 88WindWind Speed(MPH) Direction Calm0.6-1.41.5-3.4 3.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE SSSW SW WSW W WNW NWNNW SUBTOTAL0.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.001 0.000 0.002 0.000 0.002 0.001 0.000 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.0060.0250.0310.0490.081 0.0280.0170.020 0.0310.0290.039 0.0150.0020.005 0.0030.0020.007 0.3870.0300.0840.1090.094 0.0430.0250.027 0.0560.0760.135 0.0840.0120.001 0.0040.0090.018 0.8080.0460.0900.1090.099 0.0230.0040.005 0.0090.0510.162 0.1460.0160.006 0.0070.0050.023 0.8030.1060.2190.1380.079 0.0080.0010.003 0.0100.0480.294 0.1870.0460.045 0.0560.0490.067 1.3570.0230.0430.0110.001 0.0010.0000.001 0.0010.0110.1130.0480.0170.032 0.0400.0270.0390.4110.0000.0000.0000.000 0.0000.0000.001 0.0000.0040.027 0.0090.0100.009 0.0010.0010.002 0.0650.0000.0000.0000.000 0.0000.0000.000 0.0000.0010.004 0.0030.0020.000 0.0010.0010.001 0.0130.2310.4700.4170.356 0.1050.0470.058 0.1070.2210.775 0.4930.1060.0990.1120.0950.158 3.849Total Hours Of Valid Stability Observations101940Total Hours Of Stability Class B3879Total Hours Of Valid Wind Direction-Wind Speed-Stability Class B3813Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations99059Meteorological Facility Located 0.8 Km Ssw Of Watts Bar Nuclear Plant Stability Based On Delta-T Between 9.51 And 45.63 MetersWind Speed And Direction Measured At 46.36 Meter LevelMean Wind Speed = 7.90Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-80WATTS BARWBNP-63Table 2.3-55 Joint Percentage Frequencies Of Wind Speed By Wind Direction ForStability Class C (-1.7< Delta T<=-1.5 C/100 M), Watts Bar Nuclear PlantJan 1, 77 - Dec 31, 88WindWind Speed (MPH)DirectionCalm 0.6-1.4 1.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW SUBTOTAL0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.0000.0000.002 0.0030.0010.002 0.0010.0010.000 0.0030.0010.001 0.0000.0000.000 0.0020.0170.0320.0570.121 0.1510.0420.029 0.0390.0540.059 0.0740.0370.018 0.0130.0040.0110.0220.7640.0990.1340.215 0.1790.0980.059 0.0450.0830.133 0.2460.1620.039 0.0170.0120.021 0.0371.580 0.080 0.185 0.173 0.142 0.022 0.007 0.008 0.032 0.067 0.283 0.209 0.038 0.021 0.023 0.029 0.045 1.365 0.197 0.339 0.202 0.0600.011 0.003 0.002 0.018 0.066 0.361 0.231 0.052 0.0590.113 0.147 0.137 1.9990.0430.0650.013 0.0080.0000.000 0.0040.0060.024 0.1260.0420.023 0.0270.0800.0580.0470.5670.0010.0000.000 0.0000.0000.000 0.0010.0000.0110.0270.0150.012 0.0050.0080.001 0.0000.082 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.005 0.002 0.002 0.002 0.000 0.000 0.000 0.012 0.452 0.779 0.726 0.543 0.175 0.100 0.101 0.194 0.360 1.126 0.700 0.187 0.144 0.240 0.268 0.292 6.386Total Hours Of Valid Stability Observations101940Total Hours Of Stability Class C6506Total Hours Of Valid Wind Direction-wind Speed-stability Class C6326 Total Hours Of Valid Wind Direction-wind Speed-stability Observations99059Meteorological Facility Located 0.8 Km Ssw Of Watts Bar Nuclear PlantStability Based On Delta-t Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 46.36 Meter LevelMean Wind Speed = 7.37Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-81WATTS BARWBNP-63Table 2.3-56 Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class D (-1.5< Delta T<=-0.5 C/100 M), Watts Bar Nuclear PlantJan 1, 77 - Dec 31, 88Wind Wind Speed(MPH)DirectionCalm0.6-1.4 1.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.4 18.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW SUBTOTAL0.0020.0030.0050.006 0.0040.0020.002 0.0030.0050.006 0.0040.0030.002 0.0020.0020.002 0.0550.0400.0600.0820.1130.1000.0490.048 0.0850.0770.074 0.0470.0450.062 0.0550.0430.040 1.021 0.284 0.408 0.669 0.689 0.428 0.194 0.223 0.386 0.586 0.800 0.513 0.354 0.248 0.199 0.236 0.231 6.4480.4760.8610.9820.594 0.2340.1130.156 0.2780.5641.421 0.8640.3440.193 0.2010.2340.3117.828 0.614 1.195 0.876 0.349 0.103 0.022 0.043 0.067 0.295 1.094 0.622 0.208 0.193 0.275 0.363 0.384 6.7031.7931.9061.0420.186 0.0510.0150.039 0.0780.3101.436 0.7570.3360.517 0.8930.9881.13211.4790.3800.2830.0880.013 0.0060.0030.010 0.0480.1480.769 0.2690.1310.2050.2710.3040.346 3.2740.011 0.007 0.000 0.000 0.000 0.000 0.005 0.009 0.052 0.158 0.047 0.026 0.037 0.018 0.020 0.013 0.406 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.008 0.020 0.012 0.008 0.003 0.000 0.001 0.000 0.0523.6004.7233.7451.950 0.9270.3990.528 0.9532.0455.779 3.1361.4571.460 1.9132.1932.45937.265Total Hours Of Valid Stability Observations101940Total Hours Of Stability Class D37699Total Hours Of Valid Wind Direction-Wind Speed-Stability Class D36914Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations99059 Meteorological Facility Located 0.8 Km Ssw Of Watts Bar Nuclear PlantStability Based On Delta-T Between 9.51 And 45.63 MetersWind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 7.05Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-82WATTS BARWBNP-63Table 2.3-57 Joint Percentage Frequencies Of Wind Speed By Wind Direction ForStability Class E (-0.5< Delta T<= 1.5 C/100 M), Watts Bar Nuclear PlantJan 1, 77 - Dec 31, 88WindWind Speed(Mph)DirectionCalm0.6-1.4 1.5-3.4 3.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNWSUBTOTAL 0.020 0.033 0.047 0.039 0.024 0.0120.011 0.024 0.041 0.054 0.029 0.018 0.0130.011 0.013 0.012 0.4010.1460.2170.3130.313 0.2870.1530.128 0.2090.2720.282 0.1890.1500.1120.1200.1250.1153.131 0.350 0.612 0.871 0.683 0.312 0.142 0.164 0.394 0.773 1.094 0.560 0.298 0.225 0.164 0.210 0.197 7.0490.2680.5640.5450.230 0.0950.0580.055 0.1550.5291.266 0.5140.2220.134 0.1280.1300.157 5.051 0.418 0.460 0.288 0.074 0.039 0.020 0.037 0.0710.311 1.038 0.448 0.164 0.125 0.125 0.209 0.169 3.996 0.641 0.368 0.131 0.047 0.026 0.008 0.041 0.128 0.344 1.425 0.723 0.247 0.192 0.147 0.208 0.218 4.897 0.024 0.009 0.004 0.004 0.003 0.000 0.016 0.060 0.126 0.552 0.244 0.083 0.035 0.017 0.024 0.020 1.2230.0000.0000.0000.000 0.0000.0010.004 0.0070.0320.097 0.0320.0140.005 0.0000.0010.000 0.194 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.007 0.003 0.004 0.001 0.000 0.000 0.000 0.000 0.0151.8672.2642.1991.391 0.7860.3940.457 1.0472.4365.8112.7441.1970.842 0.7130.9210.88925.956Total Hours Of Valid Stability Observations101940Total Hours Of Stability Class E26543Total Hours Of Valid Wind Direction-Wind Speed-Stability Class E25712Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations99059 Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantStability Based On Delta-T Between 9.51 And 45.63 MetersWind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 5.24Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-83WATTS BARWBNP-63Table 2.3-58 Joint Percentage Frequencies Of Wind Speed By Wind Direction ForStability Class F (1.5< Delta T<= 4.0 C/100 M), Watts Bar Nuclear PlantJan 1, 77 - Dec 31, 88WindWind Speed (MPH)Direction Calm0.6-1.4 1.5-3.43.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW SUBTOTAL 0.036 0.067 0.092 0.074 0.036 0.016 0.018 0.034 0.058 0.068 0.039 0.023 0.021 0.017 0.018 0.022 0.638 0.203 0.297 0.454 0.406 0.326 0.164 0.162 0.206 0.269 0.229 0.214 0.141 0.158 0.146 0.134 0.156 3.665 0.345 0.715 0.937 0.713 0.220 0.0790.114 0.303 0.613 0.802 0.378 0.214 0.157 0.107 0.139 0.170 6.0050.1490.3870.3180.081 0.0090.0090.023 0.0710.2670.701 0.2090.0840.054 0.0450.0580.075 2.538 0.092 0.149 0.076 0.004 0.004 0.0000.011 0.014 0.090 0.462 0.132 0.062 0.032 0.027 0.035 0.051 1.2430.0380.0340.0120.002 0.0010.0000.003 0.0140.0470.352 0.1870.0550.023 0.0140.0190.013 0.8160.0010.0000.0000.000 0.0000.0000.000 0.0000.0020.032 0.0220.0030.0010.0000.0010.001 0.0640.0000.0000.0000.000 0.0000.0000.000 0.0000.0010.000 0.0010.0000.000 0.0000.0000.000 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 0.000 0.000 0.000 0.0000.8651.6491.8891.279 0.5960.2670.331 0.6411.3462.646 1.1820.5820.447 0.3570.4050.488 14.970Total Hours Of Valid Stability Observations101940Total Hours Of Stability Class F15456Total Hours Of Valid Wind Direction-Wind Speed-Stability Class F14829Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations99059Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant Stability Based On Delta-T Between 9.51 And 45.63 MetersWind Speed And Direction Measured At 46.36 Meter LevelMean Wind Speed = 3.02 METEOROLOGY2.3-84WATTS BARWBNP-63Table 2.3-59 Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class G (Delta T > 4.0 C/100 M) Watts, Bar Nuclear Plant Jan 1, 77 - Dec 31, 88WindWind Speed (MPH) Direction Calm 0.6-1.41.5-3.4 3.5-5.45.5-7.4 7.5-12.412.5-18.418.5-24.4>=24.5Total N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW SUBTOTAL 0.014 0.026 0.038 0.030 0.010 0.004 0.005 0.013 0.020 0.0200.011 0.008 0.007 0.006 0.007 0.007 0.2260.116 0.166 0.226 0.162 0.128 0.055 0.043 0.087 0.101 0.080 0.074 0.061 0.059 0.064 0.069 0.069 1.557 0.202 0.403 0.625 0.498 0.098 0.031 0.058 0.197 0.351 0.375 0.1750.111 0.099 0.074 0.085 0.094 3.474 0.084 0.187 0.223 0.061 0.004 0.005 0.006 0.039 0.185 0.4050.110 0.049 0.026 0.030 0.044 0.038 1.4970.0190.0750.0400.000 0.0000.0000.003 0.0070.0420.224 0.0430.0240.018 0.0090.0130.019 0.5380.011 0.010 0.005 0.001 0.001 0.000 0.001 0.003 0.008 0.091 0.037 0.009 0.009 0.005 0.001 0.001 0.1940.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.003 0.0010.0000.0000.0000.0000.000 0.0040.0000.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.0000.0000.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.446 0.865 1.158 0.750 0.241 0.0950.116 0.346 0.708 1.197 0.451 0.262 0.218 0.188 0.219 0.228 7.489Total Hours Of Valid Stability Observations101940Total Hours Of Stability Class G7745 Total Hours Of Valid Wind Direction-Wind Speed-Stability Class G7419Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations99059Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear PlantStability Based On Delta-T Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 2.87 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY2.3-85WATTS BARWBNP-65Table 2.3-60 Joint Percentage Frequencies Of Wind Speed By Stability Class, Watts Bar Nuclear PlantJan 1, 77 - Dec 31, 88Wind Speed Stability Class (MPH) A B C D E FGCALM 0.0010.0010.0000.0550.4010.6380.2260.6-1.40.0130.0060.0171.0213.1313.6651.5571.5-3.40.2120.3870.7646.4487.0496.0053.4743.5-5.40.5530.8081.5807.8285.0512.5381.4975.5-7.40.7190.8031.3656.7033.9961.2430.5387.5-12.41.6911.3571.99911.4794.8970.8160.19412.5-18.40.7530.4110.5673.2741.2230.0640.00418.5-24.40.1180.0650.0820.4060.1940.0020.000>=24.50.0240.0130.0120.0520.0150.0000.000TOTAL 4.0843.8496.38637.26525.95614.9707.489Total Hours Of Valid Stability Observations101940Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations99059 Total Hours Of Observations105192Joint Recoverability Percentage94.2 Meteorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant Stability Based On t Between 9.51 And 45.63 MetersWind Speed And Direction Measured At 46.36 Meter Level 2.3-86METEOROLOGYWATTS BARWBNP-83*Meteorological facility located 0.8 km SSW of reactor site. Temperature instruments 9.51 and 45.63 meters above ground. Wind speed and direction measured at 9.72-meter level. Joint percent valid data in data base = 93.4.**Less than 5% of the hours had nonzero X/Q values. Table 2.3-61 Calculated 1-hour Average Atmospheric Dispersion Factors (X/q) At Minimum Distance (1100 Meters) Between Release Zone (100 M Radius)

And Exclusion Area Boundary (1200 M Radius) For Watts Bar Nuclear Plant(Sheet 1 of 1)Based on RG 1.145 and Meteorological Data for 1974 Through 1988*

Plume Sector Direction 0.5th PercentileX/Q Value (sec/m

3) 5th PercentileX/Q Value (sec/m 3)N 3.312E-43.396E-5 NNE3.341E-44.596E-5 NE 3.954E-43.314E-5 ENE5.060E-42.883E-5 E 5.293E-43.177E-5 ESE5.321E-42.721E-5 SE 6.040E-45.996E-5SSE4.705E-42.622E-5 S 3.068E-42.662E-5 SSW2.901E-42.806E-5 SW 3.441E-41.791E-5 WSW4.394E-43.217E-5 W 3.704E-4-**

WNW1.322E-4-**

NW 2.242E-4-**

NNW3.154E-4-** All DirectionsCombined1.217E-35.323E-4 METEOROLOGY2.3-87WATTS BARWBNP-89* Meteorological facility located 0.8 km SSW of reactor site. Temperature instruments 9.51 and 45.63 meters above ground. Wind speed and direction measured at 9.72-meter level. Joint percent valid data in data base = 93.7.**Less than 5% of the hours had nonzero X/Q values. Table 2.3-61a Calculated 1-hour Average Atmospheric Dispersion Factors (X/q)

At Minimum Distance (1100 Meters) Between Release Zone (100 M Radius)

And Exclusion Area Boundary (1200 M Radius) For Watts Bar Nuclear Plant(Sheet 1 of 1)Based On Rg 1.145 And Meteorological Data For 1974 Through 1993*

Plume Sector Direction 0.5th PercentileX/Q Value (sec/m

3) 5th PercentileX/Q Value (sec/m 3)N 3.674E-43.550E-5NNE3.808E-45.036E-5 NE 4.597E-43.990E-5 ENE5.305E-43.181E-5 E 5.297E-42.989E-5 ESE5.089E-42.572E-5 SE 6.069E-44.769E-5SSE4.645E-42.375E-5 S 3.452E-42.598E-5 SSW3.171E-42.721E-5 SW 3.703E-42.376E-5 WSW4.728E-43.286E-5 W 3.701E-4-**

WNW1.452E-4-**

NW 2.357E-4-**

NNW3.239E-4-** All Directions Combined9.297E-35.263E-5 2.3-88METEOROLOGYWATTS BARWBNP-67 *Meteorological facility located 0.8 km SSW of reactor site. Temperature instruments 9.51 and 45.63 meters above ground. Wind speed and direction measured at 9.72-meter level. Joint percent valid data in data base = 93.4.**Less than 5% of the hours had nonzero x/Q values.Table 2.3-62 Calculated 1-hour Average And Annual Average Atmospheric Dispersion Factors (X/q) At Low Population Zone Distance (4828 Meters) For Watts Bar Nuclear PlantBased on R.G. 1.145 and Meteorological Data for 1974 Through 1988*

Plume Sector Direction 0.5th Percentilex/Q Value (sec/m 3)5th Percentilex/Q Value (sec/m 3)Annual Averagex/Q Value (sec/m 3)N 7.665E-54.828E-67.054E-7NNE7.799E-58.040E-61.150E-6 NE 9.809E-54.720E-61.225E-6 ENE1.298E-43.714E-61.282E-6 E 1.348E-44.333E-61.391E-6 ESE1.331E-43.357E-61.533E-6 SE 1.445E-41.060E-51.467E-6 SSE1.183E-4 3.148E-69.964E-7 S 7.146E-53.246E-67.454E-7 SSW6.759E-53.542E-67.091E-7 SW 8.790E-51.467E-68.111E-7 WSW1.206E-44.466E-69.701E-7 W 9.350E-5-**4.400E-7 WNW2.284E-5-**2.335E-7 NW 4.944E-5-**2.507E-7NNW7.223E-5-**3.935E-7All DirectionsCombined2.717E-41.352E METEOROLOGY2.3-89WATTS BARWBNP-67* Meteorological facility located 0.8 km SSW of reactor site. Temperature instruments 9.51 and 45.63 meters above ground. Wind speed and direction measured at 9.72-meter level. Joint percent valid data in data base = 93.7.**Less than 5% of the hours had nonzero X/Q values.Table 2.3-62a Calculated 1-hour Average And Annual Average Atmospheric Dispersion Factors (X/q) At Low Population Zone Distance (4828 Meters)

For Watts Bar Nuclear PlantBased on R.G. 1.145 and Meteorological Data for 1974 Through 1993*

Plume Sector Direction 0.5th PercentileX/Q Value (sec/m 3)5th PercentileX/Q Value (sec/m 3)Annual AverageX/Q Value (sec/m 3)N 0.798E-45.094E-60.842E-6NNE0.845E-48.854E-61.386E-6 NE 1.135E-45.827E-61.639E-6 ENE1.338E-44.514E-61.561E-6 E 1.365E-44.128E-61.600E-6 ESE1.305E-43.181E-61.655E-6 SE 1.411E-47.997E-61.526E-6 SSE1.161E-4 2.853E-61.035E-6 S 0.772E-43.211E-60.881E-6 SSW0.731E-43.444E-60.814E-6 SW 0.930E-42.451E-61.001E-6 WSW1.239E-44.608E-61.212E-6 W 0.897E-4-**0.469E-6 WNW0.265E-4-**0.263E-6 NW 0.502E-4-**0.272E-6NNW0.691E-4-**0.416E-6All DirectionsCombined2.797E-41.349E 2.3-90METEOROLOGYWATTS BARWBNP-65*1-hour and annual average X/Qs calculated from meteorological data for 1974 through 1988. Meteorological facility located 0.8 km SSW of reactor site. Te mperature instruments 9.51 and 45.63 meters above ground. Wind speed and direction measured at 9.72-meter level. Joint percent valid data in data base = 93.4.Table 2.3-63 Values Of 5th Percentile Overall Site 8-hour, 16-hour, 3-day, And 26-day Atmospheric Dispersion Factors (X/q) At Low Population Zone Distance (4828 Meters) For Watts Bar Nuclear PlantBased on R.G. 1.145 Method of Logarithmic Interpolation Between Overall5th Percentile 1-hour X/Q Assumed to Apply for 2-hour Period and MaximumSector Annual Average X/Q (underscored in Table 2.3-62)*Averaging Period 5th PercentileX/Q Value (sec/m

3) 8-hour6.447E-516-hour4.452E-5 3-day 1.993E-526-day 6.288E-6 METEOROLOGY2.3-91WATTS BARWBNP-89*1-hour and annual average X/Qs calculated from meteorological data for 1974 through 1993. Meteorological facility located 0.8 km SSW of reactor site. Te mperature instruments 9.51 and 45.63 meters above ground. Wind speed and direction measured at 9.72-meter level. Joint percent valid data in data base = 93.7.Table 2.3-63a VALUES OF 5TH PERCENTILE OVERALL SITE 8-HOUR, 16-HOUR, 3-DAY, AND 26-DAY ATMOSPHERIC DISPERSION FACTORS (X/Q) AT LOW POPULATION ZONE DISTANCE (4828 METERS) FOR WATTS BAR NUCLEAR PLANTBased on RG 1.145 Method of Logarithmic Interpolation Between Overall5th Percentile 1-hour X/Q Assumed to Apply for 2-hour Period and MaximumSector Annual Average X/Q (from Table 2.3-62a)*Averaging Period 5th PercentileX/Q Value (sec/m
3) 8-hour6.516E-516-hour4.529E-5 3-day 2.057E-526-day 6.621E-6 2.3-92METEOROLOGYWATTS BARWBNP-65*1-hour and annual average X/Qs calculated from meteorological data for 1974 through 1988.

Meteorological facility located 0.8 km SSW of reactor site. Temperature instruments 9.51 and 45.63 meters above ground. Wind speed and direction measured at 9.72-meter level. Joint percent valid data in data base = 93.4.Table 2.3-64 0.5th Percentile Sector Values Of 8-hour, 16-hour, 3-day, And 26-day Atmospheric Dispersion Factors (X/q) At Low Population Zone Outer Boundary Distance (4828 Meters) For Watts Bar Nuclear PlantBased on R.G. 1.145 Method of Logarithmic Interpolation Between 0.5th Percentile 1-hour X/Q for Each Sector and Annual Average X/Q for Same Sector.* Sector-Specific X/Q Values (sec/m

3) Plume Sector 8-hour 16-hour 3-day 26-dayN 3.531E-52.396E-51.034E-53.090E-6 NNE3.884E-52.741E-51.286E-54.342E-6 NE 4.752E-53.308E-51.507E-54.874E-6 ENE6.049E-54.130E-51.804E-55.492E-6 E 6.328E-54.336E-51.909E-55.877E-6 ESE6.363E-54.399E-51.975E-56.257E-6 SE 6.765E-54.629E-52.032E-56.230E-6 SSE5.370E-53.618E-51.536E-54.488E-6 S 3.361E-52.305E-51.017E-53.139E-6 SSW3.182E-52.183E-59.639E-62.980E-6 SW 4.051E-52.750E-51.187E-53.550E-6 WSW5.433E-53.647E-51.535E-54.433E-6 W 3.855E-52.475E-59.465E-62.381E-6 WNW1.071E-57.329E-63.221E-69.895E-7 NW 2.064E-51.333E-55.167E-61.325E-6 NNW3.051E-51.983E-S7.784E-62.033E-6 METEOROLOGY2.3-93WATTS BARWBNP-89*1-hour and annual average X/Qs calculated from meteorological data for 1974 through 1993.

Meteorological facility located 0.8 km SSW of reactor site. Temperature instruments 9.51 and 45.63 meters above ground. Wind speed and direction measured at 9.72-meter level. Joint percent valid data in data base = 93.7.Table 2.3-65 0.5th Percentile Sector Values Of 8-hour, 16-hour, 3-day, And 26-day Atmospheric Dispersion Factors (X/q) At Low Population Zone Outer Boundary Distance (4828 Meters) For Watts Bar Nuclear PlantBased on RG 1.145 Method of Logarithmic Interpolation Between 0.5th Percentile 1-hour X/Q for Each Sector and Annual Average X/Q for Same Sector.*Sector-Specific X/Q Values (sec/m 3)Plume Sector 8-hour 16-hour 3-day 26-dayN 3.760E-52.581E-51.141E-53.534E-6 NNE4.281E-53.048E-51.458E-55.060E-6 NE 5.631E-53.967E-51.855E-56.228E-6 ENE6.412E-54.438E-51.997E-56.347E-6 E 6.545E-54.532E-52.041E-56.494E-6 ESE6.340E-54.418E-52.018E-56.553E-6 SE 6.677E-54.592E-52.039E-56.353E-6SSE5.319E-53.601E-51.544E-54.579E-6 S 3.683E-52.545E-51.141E-53.606E-6 SSW3.475E-52.396E-51.070E-53.359E-6 SW 4.397E-53.023E-51.341E-54.174E-6 WSW5.765E-53.933E-51.715E-55.208E-6 W 3.763E-52.438E-50.950E-52.458E-6 WNW1.234E-50.843E-50.369E-51.124E-6 NW 2.116E-51.375E-50.539E-51.406E-6 NNW2.969E-51.946E-50.777E-52.084E-6 2.3-94METEOROLOGYWATTS BARWBNP-83 a Hourly 10-m wind and 10- and 46-m temperature data.

Meteorological facility located 0.8 km SSW of reactor site.

b Calms assigned a wind speed of 0.3 mph.

c Travel distance from 100-m radius release zone to 1200-m exclusion area boundary distance.

d Actual 2-hour and 6-hour X/Q averaging periods were used.

e Calms assigned a wind speed of 0.6 mph.Table 2.3-66 Atmospheric Dispersion Factors (X/q), Sec/m 3, For Design Basis Accident Analyses Based On Onsite Meteorological Data For Watts Bar Nuclear Plant a(Sheet 1 of 1)A.Regulatory Guide 1.4 Results in original FSAR (5th percentile values) for July 1973 Through June 1975 Data.

b Period(hours)Minimum Distance toExclusion Boundary (1100 m) c Low Population Zone (4828 m) 0-20.692E-3 d0.160E-3d 2-8-0.844E-4d 8-24-0.854E-524-96-0.455E-596-720-0.198E-5B.Regulatory Guide 1.145 Results (maximum sector 0.5th percentile 1-hour value for 0-2 hours at exclusion area boundary and at low population zone; and 8-hour, 16-hour, 3-day and 26-day values for 2-8, 8-24, 24-96, and 96-720 hours from logarithmic interpolation between 0.5th percentile maximum sector 1-hour value at 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> and corresponding sector annual average value at 8760 hours0.101 days <br />2.433 hours <br />0.0145 weeks <br />0.00333 months <br /> at low population zone) for 1974 through 1988 Data e.Period(1100 m)c(4828 m) 0-20.604E-30.145E-3 2-8-0.677E-4 8-24-0.463E-424-96-0.203E-496-720-0.623E-5 METEOROLOGY2.3-95WATTS BARWBNP-891. Hourly 10-m wind and 10 and 46-meter temperature data. Meteorological facility located 0.8 km SSW of reactor site.2. Calms assigned a wind speed of 0.3 mph.

3. Travel distance from 100-m radius release zone to 1200-m exclusion area boundary distance.4. Actual 2-hour and 6-hour X/Q averaging periods were used.
5. Calms assigned a wind speed of 0.6 mph.Table 2.3-66a Atmospheric Dispersion Factors (X/q), Sec/m 3, For Design Basis Accident Analyses Based On Onsite Meteorological Data For Watts Bar Nuclear Plant 1A.Regulatory Guide 1.4 Results in original FSAR (5th percentile values) for July 1973 Through June 1975 Data.

2 Period(hours)Minimum Distance to Exclusion Boundary (1100 m) 3 Low Population Zone (4828 m) 0-20.692E-3 40.160E-3 4 2-8-0.844E-4 4 8-24-0.854E-524-96-0.455E-596-720-0.198E-5B.Regulatory Guide 1.145 Results (maximum sector 0.5th percentile 1-hour value for 0-2 hours at exclusion area boundary and at low population zone; and 8-hour, 16-hour, 3-day and 26-day values for 2-8, 8-24, 24-96, and 96-720 hours from logarithmic interpolation between 0.5th percentile maximum sector 1-hour value at 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> and corresponding sector annual average value at 8760 hours0.101 days <br />2.433 hours <br />0.0145 weeks <br />0.00333 months <br /> at low population zone) for 1974 through 1993 Data 5.Period(hours)Minimum Distance toExclusion Boundary(1100 m)3Low Population Zone(4828 m) 0-20.607E-30.141E-3 2-8-0.668E-4 8-24-0.459E-424-96-0.204E-496-720-0.635E-5 2.3-96METEOROLOGYWATTS BARWBNP-63NOTE:The calculations for the 2-year data base were slightly conservative in comparison to those for the 15-year data base. The 2-year values were computed in 1976 with the speed assigned to calm hours assumed to be 0.3 mph. The 15-year values were computed in 1989 with the speed assigned to calms assumed to be 0.6 mph, which is the starting threshold for the anemometer.*Meteorological facility located 0.8 km SSW of reactor site.Table 2.3-67 Dispersion Meteorology - Onsite 10-meter Wind Data - 5th Percentile Values Of Inverse Wind Speed (1/u) Distributions For Post-loca Control Bay Dose Calculations For Watts Bar Nuclear PlantA.July 1973 through June 1975 Wind Speed and Direction DataPlume Sectors Averaging Periods (degrees) 1-hour8-hour16-hour3-day26-day 89.75-157.251.590.8340.6700.4470.348132.25-199.751.610.8640.6880.4960.361 154.75-222.251.440.7430.5980.4410.300 192.25-259.751.330.7190.6010.4370.302B.January 1974 through December 1988 Wind Speed and Direction DataPlume Sectors Averaging Periods (degrees) 1-hour8-hour16-hour3-day26-day 89.75-157.25 1.82 1.040.8520.5930.463132.25-199.75 1.270.7600.6260.4400.316 154.75-222.250.8660.5740.4970.3600.264192.25-259.75 1.040.6530.5760.4160.266 METEOROLOGY2.3-97WATTS BARWBNP-89NOTE:The 2-year values were computed in 1976 with the speed assigned to calm hours assumed to be 0.3 mph. The 20-year values were computed in 1994 with the speed assigned to calms assumed to be 0.6 mph, which is the starting threshold for the anemometer.*Meteorological facility located 0.8 km SSW of reactor site.Table 2.3-67a Dispersion Meteorology - Onsite 10-meter Wind Data - 5th Percentile Values Of Inverse Wind Speed (1/u) Distributions For Post-loca Control Bay Dose Calculations For Watts Bar Nuclear PlantA.July 1973 through June 1975 Wind Speed and Direction DataPlume Sectors Averaging Periods (degrees) 1-hour8-hour16-hour3-day26-day 89.75-157.251.590.8340.6700.4470.348132.25-199.751.610.8640.6880.4960.361 154.75-222.251.440.7430.5980.4410.300 192.25-259.751.330.7190.6010.4370.302B.January 1974 through December 1993 Wind Speed and Direction DataPlume Sectors Averaging Periods (degrees) 1-hour8-hour16-hour3-day26-day89.75-157.25 1.97 1.04 0.862 0.6070.456132.25-199.75 1.29 0.784 0.626 0.4340.312154.75-222.25 0.891 0.606 0.516 0.3680.255192.25-259.75 1.10 0.713 0.610 0.4350.300 2.3-98METEOROLOGYWATTS BARWBNP-89 METEOROLOGY 2.3-99WATTS BAR WBNP-89Figure 2.3-1 Normal Sea Level Pressure Distribution Over North America and The North Atlantic Ocean

METEOROLOGY 2.3-100WATTS BAR WBNP-89Figure 2.3-2 Total Number of Forecast-Days of High Meteorological Potential For Air Pollution in a 5 Year Period METEOROLOGY 2.3-101WATTS BAR WBNP-89Figure 2.3-3 Climatological Data Sources in Area Around Watts Bar Site METEOROLOGY 2.3-102WATTS BAR WBNP-89Figure 2.3-4 Wind Speed at 9.72 Meters All Stability classes, Watts Bar Nuclear Plant, January 1, 1974 -December 31, 1993 METEOROLOGY 2.3-103WATTS BAR WBNP-89Figure 2.3-5 Wind Speed at 46.36 Meters All Stability Classes, Watts Bar Nuclear Plant, January 1, 1977 -December 31, 1993 METEOROLOGY 2.3-104WATTS BAR WBNP-89Figure 2.3-6a Percent Occurrences Of Pasquill Stability Classes A, B, C, And D By Time Of Day, Watts Bar Nuclear Plant, 1974-1 993 METEOROLOGY 2.3-105WATTS BAR WBNP-89Figure 2.3-6b Percent Occurrences Of Pasquill Stability Classes E, F, and G By Time of Day, Watts Bar Nuclear Plant, 1974-199 3

METEOROLOGY 2.3-106WATTS BAR WBNP-89Figure 2.3-7 Wind Speed at 9.72 Meters for Stability Class A, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993 METEOROLOGY 2.3-107WATTS BAR WBNP-89Figure 2.3-8 Wind Speed at 9.72 Meters for Stability Class B, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993 METEOROLOGY 2.3-108WATTS BAR WBNP-89Figure 2.3-9 Wind Speed at 9.72 Meters for Stability Class C, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993 METEOROLOGY 2.3-109WATTS BAR WBNP-89Figure 2.3-10 Wind Speed at 9.72 Meters for Stability Class D, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993 METEOROLOGY 2.3-110WATTS BAR WBNP-89Figure 2.3-11 Wind Speed at 9.72 Meters for Stability Class E, Watts Bar Nuclear Plant, January 1, 1974 -December 31, 1993 METEOROLOGY 2.3-111WATTS BAR WBNP-89Figure 2.3-12 Wind Speed at 9.72 Meters for Stability Class F, Watts Bar Nuclear Plant, January 1, 1974 -December 31, 1993 METEOROLOGY 2.3-112WATTS BAR WBNP-89Figure 2.3-13 Wind Speed at 9.72 Meters for Stability Class G, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993 METEOROLOGY 2.3-113WATTS BAR WBNP-89Figure 2.3-14 Topography Within 10 Mile Radius - N METEOROLOGY 2.3-114WATTS BAR WBNP-89Figure 2.3-15 Topography Within 10 Mile Radius - NNE METEOROLOGY 2.3-115WATTS BAR WBNP-89Figure 2.3-16 Topography Within 10 Mile Radius - NE METEOROLOGY 2.3-116WATTS BAR WBNP-89Figure 2.3-17 Topography Within 10 Mile Radius - ENE METEOROLOGY 2.3-117WATTS BAR WBNP-89Figure 2.3-18 Topography Within 10 Mile Radius - E METEOROLOGY 2.3-118WATTS BAR WBNP-89Figure 2.3-19 Topography Within 10 Mile Radius - ESE METEOROLOGY 2.3-119WATTS BAR WBNP-89Figure 2.3-20 Topography Within 10 Mile Radius - SE METEOROLOGY 2.3-120WATTS BAR WBNP-89Figure 2.3-21 Topography Within 10 Mile Radius - SSE METEOROLOGY 2.3-121WATTS BAR WBNP-89Figure 2.3-22 Topography Within 10 Mile Radius - S METEOROLOGY 2.3-122WATTS BAR WBNP-89Figure 2.3-23 Topography Within 10 Mile Radius - SSW METEOROLOGY 2.3-123WATTS BAR WBNP-89Figure 2.3-24 Topography Within 10 Mile Radius - SW METEOROLOGY 2.3-124WATTS BAR WBNP-89Figure 2.3-25 Topography Within 10 Mile Radius - WSW METEOROLOGY 2.3-125WATTS BAR WBNP-89Figure 2.3-26 Topography Within 10 Mile Radius - W METEOROLOGY 2.3-126WATTS BAR WBNP-89Figure 2.3-27 Topography Within 10 Mile Radius - WNW METEOROLOGY 2.3-127WATTS BAR WBNP-89Figure 2.3-28 Topography Within 10 Mile Radius - NW METEOROLOGY 2.3-128WATTS BAR WBNP-89Figure 2.3-29 Topography Within 10 Mile Radius Watts Bar FSAR Section 2.0 Site Characteristics

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