ML090340704

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Final Safety Analysis Report, Amendment 92, Section 2, List of Effective Pages, Table of Contents, and Figures
ML090340704
Person / Time
Site: Watts Bar Tennessee Valley Authority icon.png
Issue date: 12/18/2008
From:
Tennessee Valley Authority
To:
Office of Nuclear Reactor Regulation
References
Download: ML090340704 (242)
v • d • e


Text

e Amendment Page Amendment WBNP-76 2.1-2 WBNP-83 WBNP-76 2.1-3 WBNP-92 i WBNP-76 2.1-4 WBNP-83 WBNP-76 2.1-5 WBNP-83 WBNP-76 2.1-6 WBNP-63 WBNP-76 2.1-7 WBNP-83 i WBNP-76 2.1-8 WBNP-83 ii WBNP-76 2.1-9 WBNP-83 WBNP-76 2.1-10 WBNP-83 WBNP-76 2.1-11 WBNP-83 WBNP-76 2.1-12 WBNP-83 i WBNP-76 2.1-13 WBNP-83 ii WBNP-76 2.1-14 WBNP-33 v WBNP-76 2.1-15 WBNP-33 v WBNP-76 2.1-16 WBNP-33 vi WBNP-76 2.1-17 WBNP-63 vii WBNP-91 2.1-18 WBNP-83 viii WBNP-91 2.1-19 WBNP-83 x WBNP-91 2.1-20 WBNP-83 x WBNP-91 2.1-21 WBNP-83 xi WBNP-91 2.1-22 WBNP-83 xii WBNP-91 2.1-23 WBNP-83 xiii WBNP-91 2.1-24 WBNP-33 xiv WBNP-91 2.1-25 WBNP-33 xv WBNP-91 2.1-26 WBNP-33 xvi WBNP-91 2.1-27 WBNP-63 xvii WBNP-91 2.1-28 WBNP-83 xviii WBNP-91 2.1-29 WBNP-83 xix WBNP-91 2.1-30 WBNP-83 xx WBNP-91 2.1-31 WBNP-83 xxi WBNP-91 2.1-32 WBNP-83 xxii WBNP-91 2.1-33 WBNP-83 xxiii WBNP-91 2.1-34 WBNP-83 xxiv WBNP-91 2.1-35 WBNP-83 xxv WBNP-91 2.1-36 WBNP-83 xxvi WBNP-91 2.1-37 WBNP-83 xxvii WBNP-91 2.1-38 WBNP-50 xxviii WBNP-91 2.1-39 WBNP-50 xxix WBNP-91 2.1-40 WBNP-72 WBNP-91 2.1-41 WBNP-72 i WBNP-91 2.1-42 WBNP-72 ii WBNP-91 2.1-43 WBNP-63 1 WBNP-92 2.1-44 WBNP-63 of Effective Pages LEP-i

e Amendment Page Amendment 45 WBNP-63 2.3-22 WBNP-89 46 WBNP-63 2.3-23 WBNP-63 47 WBNP-63 2.3-24 WBNP-63 48 WBNP-63 2.3-25 WBNP-63 49 WBNP-63 2.3-26 WBNP-63 50 WBNP-63 2.3-27 WBNP-63 51 WBNP-63 2.3-28 WBNP-65 52 WBNP-63 2.3-29 WBNP-63 53 WBNP-63 2.3-30 WBNP-63 54 WBNP-63 2.3-31 WBNP-63 55 WBNP-63 2.3-32 WBNP-63 56 WBNP-63 2.3-33 WBNP-65 57 WBNP-83 2.3-34 WBNP-65 58 WBNP-83 2.3-35 WBNP-89 1 WBNP-83 2.3-36 WBNP-89 2 WBNP-92 2.3-37 WBNP-63 3 WBNP-83 2.3-38 WBNP-65 4 WBNP-83 2.3-39 WBNP-65 5 WBNP-83 2.3-40 WBNP-63 6 WBNP-83 2.3-41 WBNP-63 7 WBNP-63 2.3-42 WBNP-63 8 WBNP-63 2.3-43 WBNP-63 1 WBNP-92 2.3-44 WBNP-63 2 WBNP-92 2.3-45 WBNP-63 3 WBNP-92 2.3-46 WBNP-63 4 WBNP-92 2.3-47 WBNP-63 5 WBNP-92 2.3-48 WBNP-63 6 WBNP-92 2.3-49 WBNP-63 7 WBNP-92 2.3-50 WBNP-63 8 WBNP-92 2.3-51 WBNP-63 9 WBNP-92 2.3-52 WBNP-63 10 WBNP-92 2.3-53 WBNP-63 11 WBNP-92 2.3-54 WBNP-63 12 WBNP-92 2.3-55 WBNP-63 13 WBNP-92 2.3-56 WBNP-65 14 WBNP-92 2.3-57 WBNP-63 15 WBNP-92 2.3-58 WBNP-63 16 WBNP-92 2.3-59 WBNP-63 17 WBNP-89 2.3-60 WBNP-63 18 WBNP-92 2.3-61 WBNP-63 19 WBNP-89 2.3-62 WBNP-63 20 WBNP-89 2.3-63 WBNP-63 21 WBNP-89 2.3-64 WBNP-63 ii List of Effective Pages

e Amendment Page Amendment 65 WBNP-63 2.3-98 WBNP-89 66 WBNP-63 2.3-99 WBNP-63 67 WBNP-63 2.3-100 WBNP-89 68 WBNP-63 2.3-101 WBNP-89 69 WBNP-63 2.3-102 WBNP-89 70 WBNP-63 2.3-103 WBNP-89 71 WBNP-63 2.3-104 WBNP-89 72 WBNP-63 2.3-105 WBNP-89 73 WBNP-63 2.3-106 WBNP-89 74 WBNP-63 2.3-107 WBNP-89 75 WBNP-63 2.3-108 WBNP-89 76 WBNP-63 2.3-109 WBNP-89 77 WBNP-63 2.3-110 WBNP-89 78 WBNP-63 2.3-111 WBNP-89 79 WBNP-63 2.3-112 WBNP-89 80 WBNP-63 2.3-113 WBNP-89 81 WBNP-63 2.3-114 WBNP-89 82 WBNP-63 2.3-115 WBNP-89 83 WBNP-63 2.3-116 WBNP-89 84 WBNP-63 2.3-117 WBNP-89 85 WBNP-63 2.3-118 WBNP-89 86 WBNP-63 2.3-119 WBNP-89 87 WBNP-65 2.3-120 WBNP-89 88 WBNP-83 2.3-121 WBNP-89 89 WBNP-83 2.3-122 WBNP-89 90 WBNP-67 2.3-123 WBNP-89 91 WBNP-67 2.3-124 WBNP-89 92 WBNP-65 2.3-125 WBNP-89 93 WBNP-89 2.3-126 WBNP-89 94 WBNP-65 2.3-127 WBNP-89 95 WBNP-65 2.3-128 WBNP-89 96 WBNP-63 2.3-129 WBNP-89 97 WBNP-83 2.3-130 WBNP-89 of Effective Pages LEP-iii

e Amendment Page Amendment iv List of Effective Pages

tion Title Page R_Section_2_B.pdf R_Section_2_A.pdf SITE CHARACTERISTICS GEOGRAPHY AND DEMOGRAPHY 2.1-1 1 Site Location and Description 2.1-1 1.1 Specification of Location 2.1-1 1.2 Site Area Map 2.1-1 1.3 Boundaries for Establishing Effluent Limits 2.1-2 2 Exclusion Area Authority And Control 2.1-2 2.1 Authority 2.1-2 2.2 Control of Activities Unrelated to Plant Operation 2.1-2 2.3 Arrangements for Traffic Control 2.1-2 2.4 Abandonment or Relocation of Roads 2.1-2 3 Population Distribution 2.1-2 3.1 Population Within 10 Miles 2.1-3 3.2 Population Between 10 and 50 Miles 2.1-3 3.3 Transient Population 2.1-4 3.4 Low Population Zone 2.1-4 3.5 Population Center 2.1-5 3.6 Population Density 2.1-5 NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES 2.2-1 Location and Route 2.2-1 2 Descriptions 2.2-1 2.1 Description of Facilities 2.2-1 2.2 Description of Products and Materials 2.2-1 2.3 Pipelines 2.2-1 2.4 Waterways 2.2-1 2.5 Airports 2.2-2 2.6 Projections of Industrial Growth 2.2-2 3 Evaluation of Potential Accidents 2.2-2

3.1 REFERENCES

2.2-3 METEOROLOGY 2.3-1 1 Regional Climate 2.3-1 1.1 Data Sources 2.3-1 1.2 General Climate 2.3-1 1.3 Severe Weather 2.3-2 2 Local Meteorology 2.3-5 2.1 Data Sources 2.3-5 2.2 Normal and Extreme Values of Meteorological Parameters 2.3-6 2.3 Potential Influence of the Plant and Its Facilities on Local Meteorology 2.3-8 2.4 Local Meteorological Conditions for Design and Operating Bases 2.3-9 e of Contents 2-i

tion Title Page 3 Onsite Meteorological Measurements Program 2.3-9 3.1 Preoperational Program 2.3-9 3.2 Operational Meteorological Program 2.3-12 3.3 Onsite Data Summaries of Parameters for Dispersion Meteorology 2.3-13 4 Short-Term (Accident) Diffusion Estimates 2.3-14 4.1 Objective 2.3-14 4.2 Calculation Results 2.3-17 5 Long-Term (Routine) Diffusion Estimates 2.3-18 R_Section_2_B.pdf HYDROLOGIC ENGINEERING 2.4-1 1 Hydrological Description 2.4-1 1.1 Sites and Facilities 2.4-1 1.2 Hydrosphere 2.4-2 2 Floods 2.4-6 2.1 Flood History 2.4-6 2.2 Flood Design Considerations 2.4-7 2.3 Effects of Local Intense Precipitation 2.4-9 3 Probable Maximum Flood (PMF) on Streams and Rivers 2.4-12 3.1 Probable Maximum Precipitation (PMP) 2.4-13 3.2 Precipitation Losses 2.4-14 3.3 Runoff and Stream Course Model 2.4-14 3.4 Probable Maximum Flood Flow 2.4-18 3.5 Water Level Determinations 2.4-25 3.6 Coincident Wind Wave Activity 2.4-26 4 Potential Dam Failures, Seismically Induced 2.4-28 4.1 Dam Failure Permutations 2.4-28 4.2 Unsteady Flow Analysis of Potential Dam Failures 2.4-40 4.3 Water Level at Plantsite 2.4-40 5 Probable Maximum Surge and Seiche Flooding 2.4-40 6 Probable Maximum Tsunami Flooding 2.4-40 7 Ice Effects 2.4-41 8 Cooling Water Canals and Reservoirs 2.4-42 9 Channel Diversions 2.4-42 10 Flooding Protection Requirements 2.4-42 11 Low Water Considerations 2.4-44 11.1 Low Flow in Rivers and Streams 2.4-44 11.2 Low Water Resulting From Surges, Seiches, or Tsunami 2.4-44 11.3 Historical Low Water 2.4-44 11.4 Future Control 2.4-45 11.5 Plant Requirements 2.4-45 12 Dispersion, Dilution, and Travel Times of Accidental Releases of Liquid Effluents 46 12.1 Radioactive Liquid Wastes 2.4-46 12.2 Accidental Slug Releases to Surface Water 2.4-46 Table of Contents

tion Title Page 12.3 Effects on Ground Water 2.4-48 13 Groundwater 2.4-49 13.1 Description and On-Site Use 2.4-49 13.2 Sources 2.4-50 13.3 Accident Effects 2.4-51 13.4 Monitoring and Safeguard Requirements 2.4-52 13.5 Design Basis for Subsurface Hydrostatic Loading 2.4-52 14 Flooding Protection Requirements 2.4-52 14.1 Introduction 2.4-53 14.2 Plant Operation During Floods Above Grade 2.4-54 14.3 Warning Scheme 2.4-56 14.4 Preparation for Flood Mode 2.4-56 14.5 Equipment 2.4-58 14.6 Supplies 2.4-59 14.7 Plant Recovery 2.4-59 14.8 Warning Plan 2.4-59 14.9 Basis For Flood Protection Plan In Rainfall Floods 2.4-60 14.10 Basis for Flood Protection Plan in Seismic-Caused Dam Failures 2.4-66 14.11 Special Condition Allowance 2.4-68 GEOLOGY, SEISMOLOGY, AND GEOTECHNICAL ENGINEERING

SUMMARY

FOUNDATION CONDITIONS 2.5-1 1 Basic Geology and Seismic Information 2.5-2 1.1 Regional Geology 2.5-3 1.2 Site Geology 2.5-27 2 Vibratory Ground Motion 2.5-34 2.1 Seismicity 2.5-34 2.2 Geologic Structures and Tectonic Activity 2.5-42 2.3 Correlation of Earthquake Activity With Geologic Structures to Tectonic Prov-s 2.5-42 2.4 Maximum Earthquake Potential 2.5-43 2.5 Seismic Wave Transmission Characteristics of the Site 2.5-45 2.6 Safe Shutdown Earthquake 2.5-45 2.7 Operating Basis Earthquake 2.5-45 3 Surface Faulting 2.5-45 3.1 Geologic Conditions of the Site 2.5-45 3.2 Evidence of Fault Offset 2.5-45 3.3 Earthquakes Associated With Capable Faults 2.5-54 3.4 Investigations of Capable Faults 2.5-54 3.5 Correlation of Epicenters With Capable Faults 2.5-56 3.6 Description of Capable Faults 2.5-56 3.7 Zone Requiring Detailed Faulting Investigation 2.5-56 3.8 Results of Faulting Investigations 2.5-56 4 Stability of Subsurface Materials 2.5-57 e of Contents 2-iii

tion Title Page 4.1 Geologic Features 2.5-57 4.2 Properties of Subsurface Materials 2.5-57 4.3 Exploration 2.5-90 4.4 Geophysical Surveys 2.5-90 4.5 Excavations and Backfill 2.5-93 4.6 Groundwater Conditions 2.5-101 4.7 Response of Soil and Rock to Dynamic Loading 2.5-103 4.8 Liquefaction Potential 2.5-103 4.9 Earthquake Design Basis 2.5-114 4.10 Static Analysis 2.5-114 4.11 Safety-Related Criteria for Foundations 2.5-115 4.12 Techniques to Improve Subsurface Conditions 2.5-116 4.13 Construction Notes 2.5-118 5 Stability of Slopes 2.5-119 5.1 Slope Characteristics 2.5-119 5.2 Design Criteria and Analysis 2.5-120 5.3 Logs of Borings 2.5-128 5.4 Compaction Specifications 2.5-128 6 Embankments 2.5-12 Table of Contents

tion Title le 2.1-1 Watts Bar 1986 Peak Hours Recreation Visitation Within 10 Miles of the Site le 2.1-1a Watts Bar 1990 Estimated Peak Hour Recreation Visitation Within 10 Miles Of The Site le 2.1-1b Watts Bar 2000 Estimated Peak Hour Recreation Visitation Within 10 Miles Of The Site le 2.1-1c Watts Bar 2010 Estimated Peak Hour Recreation Visitation Within 10 Miles Of The Site le 2.1-1d Watts Bar 2020 Estimated Peak Hour Recreation Visitation Within 10 Miles Of The Site le 2.1-1e Watts Bar 2030 Estimated Peak Hour Recreation Visitation Within 10 Miles Of The Site le 2.1-1f Watts Bar 2040 Estimated Peak Hour Recreation Visitation Within 10 Miles Of The Site le 2.1-1g School Enrollments In Area Of Watts Bar Nuclear Plant le 2.1-2 Watts Bar 1970 Population Distribution Within 10 Miles of The Site le 2.1-3 Watts Bar 1978 Population Distribution Within 10 Miles of The Site le 2.1-4 Watts Bar 1980 Population Distribution Within 10 Miles of The Site le 2.1-4a Watts Bar 1986 Population Distribution Within 10 Miles of The Site le 2.1-5 Watts Bar 1990 Population Distribution Within 10 Miles of The Site le 2.1-6 Watts Bar 2000 Population Distribution Within 10 Miles of The Site le 2.1-7 Watts Bar 2010 Population Distribution Within 10 Miles of The Site of Tables 2-v

tion Title le 2.1-8 Watts Bar 2020 Population Distribution Within 10 Miles of The Site le 2.1-8a Watts Bar 2030 Population Distribution Within 10 Miles of The Site le 2.1-8b Watts Bar 2040 Population Distribution Within 10 Miles of The Site le 2.1-9 Watts Bar 1970 Population Distribution Within 50 Miles of The Site le 2.1-10 Watts Bar 1978 Population Distribution Within 50 Miles of The Site le 2.1-11 Watts Bar 1980 Population Distribution Within 50 Miles of The Site le 2.1-11a Watts Bar 1986 Population Distribution Within 50 Miles of The Site le 2.1-12 Watts Bar 1990 Population Distribution Within 50 Miles of The Site le 2.1-13 Watts Bar 2000 Population Distribution Within 50 Miles of The Site le 2.1-14 Watts Bar 2010 Population Distribution Within 50 Miles of The Site le 2.1-15 Watts Bar 2020 Population Distribution Within 50 Miles of The Site le 2.1-15a Watts Bar 2030 Population Distribution Within 50 Miles of The Site le 2.1-15b Watts Bar 2040 Population Distribution Within 50 Miles of The Site le 2.1-16 Deleted by Amendment 83 le 2.1-17 Deleted by Amendment 83 le 2.2-1 Waterborne Hazardous Material Traffic (Tons) le 2.2-2 Waterborne Hazardous Material Traffic Survey Results le 2.3-1 Thunderstorm Day Frequencies List of Tables

tion Title le 2.3-2 Temperature Data (°F)

Decatur, Tennesee*

le 2.3-3 Temperature Data (°F)

Chattanooga, Tennessee*

le 2.3-4 Watts Bar Dam Precipitation Data (Inches)*

le 2.3-5 Snowfall Data (Inches)

Decatur, Tennessee le 2.3-6 Snowfall Data (Inches)

Chattanooga and Knoxville, Tennesseea,b le 2.3-7 Average Relative Humidity Data (Percent) - Selected Hours Chattanooga, Tennessee*

le 2.3-8 Relative Humidity (Percent)

National Weather Service Station Chattanooga, Tennessee*

le 2.3-9 Absolute Humidity (gm/m3)

National Weather Service Station Chattanooga, Tennessee*

le 2.3-10 Relative Humidity (Percent)

Watts Bar Nuclear Plant Meteorological Facility*

le 2.3-11 Absolute Humidity (Gm/m3)*

Watts Bar Nuclear Plant Meteorological Facility**

le 2.3-12 Fog Data*

le 2.3-13 Joint Percentage Frequencies of Wind Speed By Wind Direction Disre-garding Stability Class, Watts Bar Nuclear Plant le 2.3-14 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-15 Wind Direction Persistence Data Disregarding Stability, Watts Bar Nuclear Plant le 2.3-16 Wind Direction Persistence Data Disregarding Stability, Watts Bar Nuclear Plant le 2.3-17 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-18 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-19 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-20 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, of Tables 2-vii

tion Title Watts Bar Nuclear Plant le 2.3-21 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-22 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-23 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-24 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-25 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-26 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-27 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-28 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-29 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-30 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-31 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-32 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-33 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-34 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-35 Joint Percentage Frequencies Of Wind Speed List of Tables

tion Title By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-36 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-37 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-38 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-39 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-40 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant le 2.3-41 Percent Occurrence Of Wind Speed*

For All Wind Directions le 2.3-42 Percent Occurrences Of Inversion Conditions And Pasquill Stability Classes A-G*

Watts Bar Nuclear Plant le 2.3-43 Deleted By Amendment 63 le 2.3-44 Inversion Persistence Data Watts Bar Nuclear Plant le 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 Plant le 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 Plant le 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 Plant le 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 Plant le 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 Plant le 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 Plant le 2.3-51 Joint Percentage Frequencies Of Wind Speed By Wind Direction For of Tables 2-ix

tion Title Stability Class G (Delta T > 4.0 C/100 M),

Watts Bar Nuclear Plant le 2.3-52 Joint Percentage Frequencies Of Wind Speed By Stability Class, Watts Bar Nuclear Plant le 2.3-53 Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class A (Delta T<=-1.9 C/100 M),

Watts Bar Nuclear Plant le 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 le 2.3-55 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 Plant le 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 Plant le 2.3-57 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 Plant le 2.3-58 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 Plant le 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 le 2.3-60 Joint Percentage Frequencies Of Wind Speed By Stability Class, Watts Bar Nuclear Plant le 2.3-61 Calculated 1-hour Average Atmospheric 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 Plant le 2.3-61a Calculated 1-hour Average Atmospheric 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 Plant le 2.3-62 Calculated 1-hour Average And Annual Average Atmospheric Disper-sion Factors (X/q) At Low Population Zone Distance (4828 Meters) For Watts Bar Nuclear Plant le 2.3-62a Calculated 1-hour Average And Annual Average Atmospheric Disper-sion Factors (X/q) At Low Population Zone Distance (4828 Meters) For Watts Bar Nuclear Plant le 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 Plant le 2.3-63a VALUES OF 5TH PERCENTILE OVERALL SITE 8-HOUR, List of Tables

tion Title 16-HOUR, 3-DAY, AND 26-DAY ATMOSPHERIC DISPERSION FACTORS (X/Q) AT LOW POPULATION ZONE DISTANCE (4828 METERS) FOR WATTS BAR NUCLEAR PLANT le 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 Plant le 2.3-64a 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 Plant le 2.3-65 Deleted By Amendment 63 le 2.3-66 Atmospheric Dispersion Factors (X/q), Sec/m3, For Design Basis Acci-dent Analyses Based On Onsite Meteorological Data For Watts Bar Nu-clear Planta le 2.3-66a Atmospheric Dispersion Factors (X/q), Sec/m3, For Design Basis Acci-dent Analyses Based On Onsite Meteorological Data For Watts Bar Nu-clear Plant1 le 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 Plant le 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 Plant le 2.4-1 Facts About Major TVA Dams and Reservoirs le 2.4-2 Facts About Non-TVA Dam and Reservoir Projects le 2.4-3 Flood Detention Capacity TVA Projects Above Watts Bar Nuclear Plant le 2.4-4 Location 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) le 2.4-5 Probable Maximum Storm Rainfall and Precipitation Excess le 2.4-6 Unit Hydrograph Data le 2.4-7 Flood Flow And Elevation Summary le 2.4-8 Floods From Postulated Seismic Failure of Upstream Dams le 2.4-9 Sheets 1 and 2 Deleted By Amendment 63 le 2.4-10 Well and Spring Inventory Within 2-mile Radius of Watts Bar Nuclear Plant Site le 2.4-11 Deleted by Amendment 83 le 2.4-12 Weir Length Description And Coefficients of Discharge For Areas 3 and 4 le 2.4-13 Drainage Area Peak Discharge le 2.4-14 Dam Safety Modification Status (Hydrologic) le 2.5-1 Soil Strength Tests le 2.5-2 Watts Bar Nuclear Plant Soil Investigation 500-kv Transformer Yard Summary Of Laboratory Test Data le 2.5-3 WATTS BAR NUCLEAR PLANT SOIL INVESTIGATION 500-KV TRANS-of Tables 2-xi

tion Title FORMER YARD

SUMMARY

OF LABORATORY TEST DATA le 2.5-4 WATTS BAR NUCLEAR PLANT SOIL INVESTIGATION NORTH COOL-ING TOWER

SUMMARY

OF LABORATORY TEST DATA le 2.5-5 WATTS BAR NUCLEAR PLANT SOIL INVESTIGATION SOUTH COOL-ING TOWER

SUMMARY

OF LABORATORY TEST DATA le 2.5-6 Watts Bar Nuclear Plant Soil Investigation Diesel Generator Building Summary of Laboratory Test Data le 2.5-7 Watts Bar Nuclear Plant Soil Investigation Essential Raw Cooling Water Supply Summary of Laboratory Test Data le 2.5-8 Watts Bar Nuclear Plant Intake Channel Soil Investigation Summary of Laboratory Test Data le 2.5-9 Watts Bar Nuclear Plant Intake Channel Soil Investigation Summary of Laboratory Test Data le 2.5-10 Watts Bar Nuclear Plant Class Ie Conduits Soil Investigation Summary Of Laboratory Test Data le 2.5-11 Watts Bar Nuclear Plant Class Ie Conduits Soil Investigation Summary of Laboratory Test Data le 2.5-12 Soil Design Values le 2.5-13 Surface Settlements (S) and Average Deformation Moduli (E) for Center of Flexible Circular Footings Loaded With 5 Ksf le 2.5-14 Effect of Removing Top 10 Feet of Rock on Settlement of 10-foot Diameter Flexible Footing le 2.5-15 Average In Situ Down-hole Soil Dynamics Diesel Generator Building le 2.5-16 Average Seismic Refraction Soil Dynamics Diesel Generator Building le 2.5-17 In-Situ Soil Dynamic Properties Watts Bar Nuclear Power Plant Class Ie Conduits and Ercw Piping le 2.5-17A Dynamic Soil Properties - Diesel Generator Building le 2.5-17B Dynamic Soil Properties - Additional Diesel Generator Building le 2.5-17C Dynamic Soil Properties - Refueling Water Storage Tanks le 2.5-17D Dynamic Soil Properties - North Steam Valve Room le 2.5-18 Watts Bar Nuclear Plant Borrow Investigation List of Tables

tion Title Summary of Laboratory Test Data le 2.5-19 Watts Bar Nuclear Plant Additional Borrow Areas Summary of Laboratory Test Data le 2.5-19a Soil Properties, Borrow Area 7 le 2.5-20 Grout Usage le 2.5-21 Watts Bar Nuclear Plant Intake Channel Summary of Laboratory Test Data Remolded Channel Area Soils le 2.5-22 TVA Soil Testing Laboratory Summary of Test Results Watts Bar Liquefaction Study le 2.5-23 Waterways Experiment Station, Corps of Engineers le 2.5-24 Watts Bar Nuclear Plant Ercw and Hpfp Systems Soil Investigation Summary of Laboratory Test Data le 2.5-25 Watts Bar Nuclear Plant Summary Of Laboratory Test Data Borrow Soil Classes le 2.5-26 Watts Bar Nuclear Plant Intake Channel Sand Material Summary of Cyclic Loading Test Data le 2.5-27 Watts Bar Nuclear Plant Intake Channel Clay Material Summary of Static Test Data le 2.5-28 Drill rod lengths and weights versus spt sample depths Applying to 1976 and 1979 reports le 2.5-29 Watts Bar Nuclear Plant ERCW Conduit 1976 Report le 2.5-30 Watts Bar Nuclear Plant ERCW Conduit 1976 Report le 2.5-31 Recommended Procedures and Guidelines for Standard Penetration Testing le 2.5-32 Drill Rod Lengths and Weights Versus SPT 1981 Report le 2.5-33 Watts Bar Nuclear Plant ERCW Conduit 1981 Report le 2.5-34 Watts Bar Nuclear Plant Essential Raw Cooling Water Piping System Liquefaction Investigation of Tables 2-xiii

tion Title Summary Of Laboratory Test Data le 2.5-35 Laboratory Procedure For Performing Cyclic Triaxial R Tests le 2.5-36 Results of Stress-Controlled Cyclic Triaxial Tests on Ercw Route Soils le 2.5-37 Summary Of Classification Data le 2.5-38 Summary of Classification Data le 2.5-39 Summary of Classification Data le 2.5-40 Summary of Classification Data le 2.5-41 Comparison of Classification and Density Data of Test Pit and Undistributed Boring Samples le 2.5-42 Watts Bar Nuclear Plant Soil-Supported Structures Representative Basal Gravel Samples Summary of Laboratory Test Data le 2.5-43 Watts Bar Nuclear Plant Soil-Support Structures Undistributed Sampling Summary of Laboratory Test Data le 2.5-44 WBNP - Bearing Capacity - Category I Soil-Supported Structures Adopted Soil Properties For Bearing Capacity Determination le 2.5-45 Watts Bar Nuclear Plant ERCW Liquefaction Trench A Summary of Laboratory Test Data Borrow Soil Classes le 2.5-45a Watts Bar Nuclear Plant ERCW Liquefaction, Trench A Supplemen-tal Borrow Summary of Laboratory Test Data Borrow Soil Classes le 2.5-46 Watts Bar Nuclear Plant ERCW Liquefaction Trench B Summary of Laboratory Test Data Borrow Soil Classes le 2.5-47 Watts Bar Nuclear Plant ERCW Liquefaction Borrow Area 9 Summary of Laboratory Test Data Borrow Soil Classes le 2.5-48 Watts Bar Nuclear Plant ERCW Liquefaction Borrow Area 10 Summary of Laboratory Test Data Borrow Soil Classes le 2.5-49 Watts Bar Nuclear Plant ERCW Liquefaction List of Tables

tion Title Borrow Area 11 Summary of Laboratory Test Data Borrow Soil Classes le 2.5-50 Watts Bar Nuclear Plant ERCW Liquefaction Borrow Area 12 Summary of Laboratory Test Data Borrow Soil Classes le 2.5-51 Watts Bar Nuclear Plant ERCW Liquefaction Borrow Area 13 Summary of Laboratory Test Data Borrow Soil Classes le 2.5-52 Watts Bar Nuclear Plant ERCW Liquefaction Borrow Area 2c Summary of Laboratory Test Data Borrow Soil Classes le 2.5-53 Watts Bar Nuclear Plant ERCW Liquefaction Borrow Area 2c Extension Summary of Laboratory Test Data Borrow Soil Groups le 2.5-54 Summary of Laboratory Test Data le 2.5-55 Granular Material Design Values Section 1032 Material le 2.5-56 Watts Bar Nuclear Plant Relative Density Test Results on Engineered Granular Fill Beneath the Diesel Generator Building le 2.5-57 Watts Bar Nuclear Plant Sieve Analysis of 1032 Gravel Tennessee Valley Authority le 2.5-58 Watts Bar Nuclear Plant ERCW - Piezometers Water Level Readings le 2.5-59 ERCW Route Liquefaction Evaluation Maximum and Average Element Stresses and Peak Accleration at the Top of Each Layer le 2.5-60 Factors of Safety with Depth When the Water Table is not Considered le 2.5-61 Factors of Safety with Depth Assuming the Water Table is 16.5 feet Below Ground Surface le 2.5-62

SUMMARY

OF SPT SAMPLES OF SILTY SANDS (SM) BELOW ERCW PIPELINES HAVING FACTOR OF SAFETY LESS THAN UNITY FOR 0.4 G PEAK GROUND SURFACE AC-of Tables 2-xv

tion Title CELERATION le 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 ACCELERATION le 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-TION le 2.5-65 Strain Criteria for Determining Potential Settlement Of Soils Subject to Earthquake With Peak Top-Of-Ground Acceleration of 0.40g At Watts Bar Nuclear Plant le 2.5-66 Soil Bearing Capacities and Factors of Safety for Soil-Supported Cate-gory I Structures List of Tables

tion Title ure 2.1-1 Location of Watts Bar Nuclear Plant Site ure 2.1-2 Watts Bar Site Location 0-50 Miles ure 2.1-3 Watts Bar Site Location 0-10 Miles ure 2.1-4a Watts Bar Topographic Map & Reservation Boundary ure 2.1-4b Site Boundary / Exclusion Area Boundary ure 2.1-5 Main Plant General Plan ure 2.1-6 Deleted by Amendment 63 ure 2.1-7 Deleted by Amendment 63 ure 2.1-8 Deleted by Amendment 63 ure 2.1-9 Deleted by Amendment 63 ure 2.1-10 Deleted by Amendment 63 ure 2.1-11 Deleted by Amendment 63 ure 2.1-12 Deleted by Amendment 63 ure 2.1-13 Deleted by Amendment 63 ure 2.1-14 Deleted by Amendment 63 ure 2.1-15 Deleted by Amendment 63 ure 2.1-16 Deleted by Amendment 63 ure 2.1-17 Deleted by Amendment 63 ure 2.1-18 Deleted by Amendment 63 ure 2.1-19 Deleted by Amendment 63 ure 2.1-20 1994 Cumulative Population Within 30 Miles Of The Site ure 2.1-21 2034 Cumulative Population Within 30 Miles of the Site ure 2.2-1 Airways in the Area of the Plant ure 2.2-2 Military Airways in the Area of the Plant ure 2.3-1 Normal Sea Level Pressure Distribution Over North America and The North Atlantic Ocean ure 2.3-2 Total Number of Forecast-Days of High Meteorological Potential For Air Pollution in a 5 Year Period ure 2.3-3 Climatological Data Sources in Area Around Watts Bar Site ure 2.3-4 Wind Speed at 9.72 Meters All Stability classes, Watts Bar Nuclear Plant, January 1, 1974 -December 31, 1993 ure 2.3-5 Wind Speed at 46.36 Meters All Stability Classes, Watts Bar Nuclear Plant, January 1, 1977 -December 31, 1993 ure 2.3-6a Percent Occurrences Of Pasquill Stability Classes A, B, C, And D By Time Of Day, Watts Bar Nuclear Plant, 1974-1993 ure 2.3-6b Percent Occurrences Of Pasquill Stability Classes E, F, and G By Time of Day, Watts Bar Nuclear Plant, 1974-1993 ure 2.3-7 Wind Speed at 9.72 Meters for Stability Class A, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993 ure 2.3-8 Wind Speed at 9.72 Meters for Stability Class B, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993 ure 2.3-9 Wind Speed at 9.72 Meters for Stability Class C, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993 ure 2.3-10 Wind Speed at 9.72 Meters for Stability Class D, Watts Bar Nuclear of Figures 2-xvii

tion Title Plant, January 1, 1974 - December 31, 1993 ure 2.3-11 Wind Speed at 9.72 Meters for Stability Class E, Watts Bar Nuclear Plant, January 1, 1974 -December 31, 1993 ure 2.3-12 Wind Speed at 9.72 Meters for Stability Class F, Watts Bar Nuclear Plant, January 1, 1974 -December 31, 1993 ure 2.3-13 Wind Speed at 9.72 Meters for Stability Class G, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993 ure 2.3-14 Topography Within 10 Mile Radius - N ure 2.3-15 Topography Within 10 Mile Radius - NNE ure 2.3-16 Topography Within 10 Mile Radius - NE ure 2.3-17 Topography Within 10 Mile Radius - ENE ure 2.3-18 Topography Within 10 Mile Radius - E ure 2.3-19 Topography Within 10 Mile Radius - ESE ure 2.3-20 Topography Within 10 Mile Radius - SE ure 2.3-21 Topography Within 10 Mile Radius - SSE ure 2.3-22 Topography Within 10 Mile Radius - S ure 2.3-23 Topography Within 10 Mile Radius - SSW ure 2.3-24 Topography Within 10 Mile Radius - SW ure 2.3-25 Topography Within 10 Mile Radius - WSW ure 2.3-26 Topography Within 10 Mile Radius - W ure 2.3-27 Topography Within 10 Mile Radius - WNW ure 2.3-28 Topography Within 10 Mile Radius - NW ure 2.3-29 Topography Within 10 Mile Radius ure 2.4-1 Tennessee River Basin Mean Annual Precipitation 35-Year Period 1935-1969 ure 2.4-2 General Plan Elevation & Sections Watts Bar Hydro Project ure 2.4-3 General Plan Elevations & Sections Fort Loudon Project ure 2.4-3a General Plan Elevations and Sections Fort Loudon Project ure 2.4-4 Norris Dam Plan-Elevations and Sections ure 2.4-5 General Plan Elevations & Sections - Melton Hill Project ure 2.4-6 General Plan Elevation And Sections - Fontana Project ure 2.4-7 General Plan Elevation & Sections - Douglas Project ure 2.4-8 General Plan Elevations & Sections - Cherokee Project ure 2.4-9 General Plan Elevation & Sections - Fort Patrick Henry Project ure 2.4-10 General Plan Elevations & Sections - Boone Project ure 2.4-11 General Plan Elevations &. Sections - Watauga Project ure 2.4-12 General Plan Elevation & Sections - South Holston Project ure 2.4-13 General Plan Elevation & Sections - Tellico Project ure 2.4-14 General Plan Elevation &. Sections - Chickamauga Project ure 2.4-15 Multiple-Purpose - Reservoir Operations Watts Bar Project ure 2.4-16 Multiple-Purpose - Reservoir Operations - Fort Loudoun Project ure 2.4-17 Multiple-Purpose - Reservoir Operations Norris Project ure 2.4-18 Multiple-Purpose - Reservoir Operations - Fontana Project ure 2.4-19 Multiple-Purpose - Reservoir Operations - Douglas Project ii List of Figures

tion Title ure 2.4-20 Multiple-Purpose - Reservoir Operations - Cherokee Project ure 2.4-21 Multiple-Purpose - Reservoir Operations - Boone Project ure 2.4-22 Multiple-Purpose - Reservoir Operations - Watauga Project ure 2.4-23 Multiple-Purpose - Reservoir Operations - South Holston Project ure 2.4-24 Multiple-Purpose - Reservoir Operations - Tellico Project ure 2.4-25 Tennessee River-Mile 529.9 - Reservoir Areas And Volumes - Watts Bar Project ure 2.4-26 Multiple-Purpose -Reservoir Operations - Chickamauga Project ure 2.4-27 Tennessee River Mile 602.3 -Reservoir Areas And Volumes - Fort Lou-doun Project ure 2.4-28 Clinch River Mile 79.8 -Reservoir Areas And Volumes - Norris Project ure 2.4-29 Clinch River Mile 23.1 - Reservoir Areas and Volumes - Melton Hill Project ure 2.4-30 Little Tennessee River Mile 61.0 - Reservoir Areas and Volumes - Fon-tana Project ure 2.4-31 French Broad River Mile 32.3 - Reservoir Areas And Volumes - Doug-las Project ure 2.4-32 Holston River Mile 52.3 - Reservoir Areas And Volumes - Cherokee Project ure 2.4-33 S.F. Holston River Mile 8.2 - Reservoir Areas and Volumes - Fort Pat-rick Henry Project ure 2.4-34 South Fork Holston River Mile 18.6 - Reservoir Areas and Volumes -

Boone Project ure 2.4-35 Watauga River Mile 36.7 - Reservoir Areas And Volumes - Watauga Project ure 2.4-36 S.F. Holston River Mile 49.8 - Reservoir Areas And Volumes - South Holston Project ure 2.4-37 Little Tennessee River Mile 0.3 - Reservoir Areas And Volumes - Tel-lico Project ure 2.4-38 Tennessee River Mile 471.0 - Reservoir Areas And Volumes - Chicka-mauga Project ure 2.4-39 Deleted by Amendment 63 ure 2.4-40 Tennessee River Mile 464.2 - Distribution Of Floods At Chattanooga, Tennessee ure 2.4-40a Main Plant Site Grading And Drainage System For Flood Studies Sheet 1

ure 2.4-40a Main Plant Site Grading and Drainage System For Flood Studies Sheet 2

ure 2.4-40a Main Plant Site Grading and Drainage System For Flood Studies Sheet 3

ure 2.4-40b Main Plant General Plan ure 2.4-40c Yard Site Grading and Drainage System For Flood Studies ure 2.4-40d-1 Main Plant Plant Perimeter Roads Plan and Profile Sheet 1 ure 2.4-40d Main Plant Plant Perimeter Roads Plan and Profile - Sheet 2 of Figures 2-xix

tion Title ure 2.4-40d Main Plant Plant Perimeter Roads Plan and Profile - Sheet 3 ure 2.4-40e Access Highway TVA DWG 1001H202 R4 - Sheet 1 ure 2.4-40e Access Highway TVA DWG. 1001H201 R4 - Sheet 2 ure 2.4-40f Main Plant Main Plant Tracks Plan - Sheet 1 ure 2.4-40f Main Plant Main Plant Tracks Sections & Profiles - Sheet 2 ure 2.4-40f Main Plant Main Plant Tracks Sections & Profiles - Sheet 3 ure 2.4-40g Yard, Grading Drainage and Surfacing Transformer & Switchyard -

Sheet 1 ure 2.4-40g Yard, Grading Drainage and Surfacing Transformer & Switchyard -

Sheet 2 ure 2.4-40g Yard, Grading Drainage and Surfacing Transformer & Switchyard -

Sheet 3 ure 2.4-40h Probable Maximum Precipation Point Rainfall ure 2.4-40i Deleted by Amendment 83 ure 2.4-40j Deleted by Amendment 83 ure 2.4-40k Deleted by Amendment 83 ure 2.4-40L Deleted by Amendment 83 ure 2.4-41 Probable Maximum March Isohyets (21,400-sq. mi. downstream) 1st 6 Hours (IN.)

ure 2.4-42 Probable Maximum March Isohyets (7980 Sq. Mi.) 1st 6 Hours (IN.)

ure 2.4-43 Rainfall Time Distribution Adopted Standard Mass Curve ure 2.4-44 72-Hour March Probable Maximum Storm Depths (IN) Tennessee Riv-er Watershed Above Chickamauga Dam ure 2.4-45 Hydrological Model Unit Areas ure 2.4-46 6-Hour Unit Hydrographs Sheet 1 of 11 ure 2.4-46 6-Hour Unit Hydrographs Sheet 2 of 11 ure 2.4-46 6-Hour Unit Hydrographs Sheet 3 of 11 ure 2.4-46 6-Hour Unit Hydrographs Sheet 4 of 11 ure 2.4-46 6-Hour Unit Hydrographs Sheet 5 of 11 ure 2.4-46 6-Hour Unit Hydrographs Sheet 6 of 11 ure 2.4-46 2-Hour Unit Hydrographs Sheet 7 of 11 ure 2.4-46 2-Hour Unit Hydrographs Sheet 8 of 11 ure 2.4-46 6-Hour Unit Hydrographs Sheet 9 of 11 ure 2.4-46 6-Hour Unit Hydrographs Sheet 10 of 11 ure 2.4-46 6-Hour Unit Hydrographs Sheet 11 of 11 ure 2.4-47a Watts Bar Probable Maximum Flood Fort Loudon - Tellico Outflow ure 2.4-47b Fort Loudon Dam Rating Curve ure 2.4-47c Tellico Dam Rating Curve ure 2.4-48 General Plan Elevation & Sections ure 2.4-49 Hydrologic Model Verification - 1973 Flood ure 2.4-50 1973 Flood-Chickamauga Reservoir Unsteady Flow Model Verification ure 2.4-51 Steady- State Model Verification Watts Bar Dam Tailwater Rating Curve ure 2.4-52 Watts Bar Nuclear Plant Probable Maximum Flood Discharge List of Figures

tion Title ure 2.4-53 West Saddle Dike Location Plan and Section ure 2.4-54 Watts Bar Probable Maximum Flood -Watts Bar Embankment Failure ure 2.4-55 Watts Bar Dam Rating Curves ure 2.4-56 Watts Bar Probable Maximum Flood Watts Bar Dam Outflow ure 2.4-57 Watts Bar Probable Maximum Flood Watts Bar Headwater Elevation ure 2.4-58 Watts Bar Probable Maximum Flood Chickamauga Headwater Eleva-tions ure 2.4-59 Chickamauga Darn Rating Curves ure 2.4-60 Watts Bar Probable Maximum Flood Chickamauga Outflow ure 2.4-61 Watts Bar Probable Maximum Flood Water Levels Before and After Embankment Failure ure 2.4-62 Relative Bore Height (After J. J. Stroker, REF. 31) ure 2.4-63 Assumed Limits of Embankment Failure Wave Expansion ure 2.4-64 Watts Bar Nuclear Plant Probable Maximum Flood Elevation ure 2.4-65 Tennessee River - Mile 514-530 - Watts Bar Nuclear Plant Flood and Thalweg Profile ure 2.4-66 Extreme Value Analysis 30-Minute Wind Speed From The Southwest Chattanooga, TN 1948-74 ure 2.4-67 Watts Bar Nuclear Plant Wind Wave Fetch ure 2.4-68 Powerhouse & Spillway Results of Analysis For Operating Basis Earth-quake - Watts Bar Dam ure 2.4-69 Embankment Results of Analysis For Operating Basis Earthquake ure 2.4-70 Deleted by Amendment 83 ure 2.4-71 Powerhouse & Spillway Results of Analysis For Operating Basis Earth-quake - Fort Loudoun Dam ure 2.4-72 Embankment Results Of Analysis For Operating Basis Earthquake -

Fort Loudoun Darn ure 2.4-73 Nonoverflow & Spillway Results of Analysis For Operating Basis Earthquake - Tellico Dam ure 2.4-74 Embankment Results For Analysis For Operating Basis Earthquake -

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

Cherokee Dam ure 2.4-79 Assumed Condition of Dam After Failure PBE And 1/2 Probable Max Flood - Cherokee Dam ure 2.4-80 Spillway & Nonoverflow Results of Analysis For Operating Basis Earthquake - Douglas Dam ure 2.4-81 Saddle Dam No. 1 Results of Analysis For Operating Basis Earthquake of Figures 2-xxi

tion Title

- Douglas Dam ure 2.4-82 Douglas Dam Assumed Condition of Dam After Failure aBE And 1/2 Probable Maximum Flood - Douglas Project ure 2.4-83 Fontana Dam Assumed Condition of Dam after Failure aBE And 1/2 Probable Maximum Flood - Fontana Dam ure 2.4-84 Deleted by Amendment 63 ure 2.4-85 Deleted by Amendment 63 ure 2.4-86 Spillway Results of Analysis For SSE Earthquake Fort Loudoun Dam ure 2.4-87 Embankment Results of Analysis For SSE Earthquake Fort Loudoun Dam ure 2.4-88 Fort Loudoun Dam Assumed Condition of Dam After Failure SSE Combined With a 25 Year Flood - Fort Loudoun Dam ure 2.4-89 Tellico Dam Assumed Condition of Dam After Failure SSE Combined With a 25 Year Flood Tellico Project ure 2.4-90 Norris Dam SSE + 25 Year Flood Judged Condition of Dam After Fail-ure - Norris Dam ure 2.4-91 SSE With Epicenter In North Knoxville Vicinity ure 2.4-92 Time and Date Flood Hydrographs ure 2.4-93 SSE With Epicenter In West Knoxville Vicinity ure 2.4-94 Location of SSE For Simultaneous Failure of The Douglas and Fontana Dams ure 2.4-95 Tennessee River Mile 523.2 Watts Bar Nuclear Plant Rating Curve ure 2.4-96 Cross Sections Tennessee River (mile 521.00) (mile 520.70) (mile 520.60) ure 2.4-97 Channel Profile Tennessee River (mile 520.0 to mile 521.37) ure 2.4-98 Main Plant General Grading Plan ure 2.4-99 Grading Plan Intake Channel ure 2.4-100 Deleted by Amendment 83 ure 2.4-101 Deleted by Amendment 33 ure 2.4-102 Wells And Spring Inventory Within 2-Mile Radius of Watts Bar Nucle-ar Plant Site ure 2.4-103 Water-Level Fluctuations In Observation Wells at The Watts Bar Site ure 2.4-104 Locations of Ground - Water Observation Wells ure 2.4-105 Generalized Water-Table Contour Map January 1972 ure 2.4-106 Mechanical - Flow Diagram Fuel Pool Cooling and Cleaning System ure 2.4-107 Powerhouse Units 1 & 2 Flow Diagram - Residual Heat Removal Sys-tem ure 2.4-108 Schematic Flow Diagram Flood Protection Provisions Open Reactor Cooling (Unit 1 Shown, Unit 2 Similar) ure 2.4-109 Schematic Flow Diagram Flood Protection Provisions Natural Convec-tion Cooling (Unit 1 Shown, Unit 2 Similar) ure 2.4-110 Watts Bar Nuclear Plant Rainfall Flood Protection Plan Basis For Safe Shutdown For Plant Flooding ure 2.4-111 Douglas PMF Failure Wave at Watts Bar Plant i List of Figures

tion Title ure 2.5-1 Regional Physiographic Map ure 2.5-2 Regional Geologic Map ure 2.5-3 Subregional Geologic Setting (Please See Figures DVD For Actual Fig-ure) ure 2.5-4 Regional Tectonic Map ure 2.5-5 Regional Bouguer Gravity Anomaly Map ure 2.5-6 Regional Magnetic Map ure 2.5-7 Regional Fault Map ure 2.5-8 Subregional Fault Map ure 2.5-9 Geologic Map Of Plant Area (North Segment) ure 2.5-10 Geologic Map of Plant Area (South Segment) ure 2.5-11 Geologic Section Through Plant Area (Please See Figures DVD For Ac-tual Figure) ure 2.5-12 Core Drill Hole and Seismic Refraction Locations ure 2.5-13 Core Drill Layout and Summary ure 2.5-14 Graphic Log Hole 1 Sta. C-60+00 ure 2.5-15 Graphic Log Hole 2 Sta. C-64+00 ure 2.5-16 Graphic Log Hole 3 Sta. C-68+00 ure 2.5-17 Graphic Log Hole 4 Sta. E-60+00 ure 2.5-18 Graphic Log Hole 5 Sta. E-62+00 ure 2.5-19 Graphic Log Hole 6 Sta. E-64+00 ure 2.5-20 Graphic Log Hole 7 Sta. E-66+00 ure 2.5-21 Graphic Log Hole 8 Sta. E-88+40 ure 2.5-22 Graphic Log Hole 9 Sta. G-60+00 ure 2.5-23 Graphic Log Hole 10 Sta. G-62+00 ure 2.5-24 Graphic Log Hole 11 Sta. G-64+00 ure 2.5-25 Graphic Log Hole 12 Sta. G-66+00 ure 2.5-26 Graphic Log Hole 13 Sta. G-68+00 ure 2.5-27 Graphic Log Hole 14 Sta. J-60+00 ure 2.5-28 Graphic Log Hole 15 Sta. J-62+00 ure 2.5-29 Graphic Log Hole 16 Sta. J-64+00 ure 2.5-30 Graphic Log Hole 17 Sta. J-66+00 ure 2.5-31 Graphic Log Hole 18 Sta. J-82+25 ure 2.5-32 Graphic Log Hole 19 Sta. L-60+00 ure 2.5-33 Graphic Log Hole 20 Sta. L-6l+00 ure 2.5-34 Graphic Log Hole 21 Sta. L-62+00 ure 2.5-35 Graphic Log Hole 22 Sta. L-64+00 ure 2.5-36 Graphic Log Hole 23 Sta. L-66+00 ure 2.5-37 Graphic Log Hold 24 Sta. L-68+00 ure 2.5-38 Graphic Log Hole M-59+00 ure 2.5-39 Graphic Log Hole 26M-60+00 ure 2.5-40 Graphic Log Hole 27 Sta. M-6l+00 ure 2.5-41 Graphic Log Hole 28 Sta.M-62+00 ure 2.5-42 Graphic Log Hole 29 Sta. M-63+00 of Figures 2-xxiii

tion Title ure 2.5-43 Graphic Log Hole 30 Sta. M-64+00 ure 2.5-44 Graphic Log Hole 31 Sta. M-65+00 ure 2.5-45 Graphic Log Hole 32 Sta. M-66+00 ure 2.5-46 Graphic Log Hole 33 Sta. N-59+00 ure 2.5-47 Graphic Log Hole 34 Sta. N-60+00 ure 2.5-48 Graphic Log Hole 35 Sta. N-6l+00 ure 2.5-49 Graphic Log Hole 36 Sta. N-62+00 ure 2.5-50 Graphic Log Hole 37 Sta. N-63+00 ure 2.5-51 Graphic Log Hole 38 Sta. N-64+00 ure 2.5-52 Graphic Log Hole 39 Sta. N-65+00 ure 2.5-53 Graphic Log Hole 40 Sta. N-66+00 ure 2.5-54 Graphic Log Hole 41 Sta. 0-60+00 ure 2.5-55 Graphic Log Hole 42 Sta. 0-61+00 ure 2.5-56 Graphic Log Hole 43 Sta. 0-62+00 ure 2.5-57 Graphic Log Hole 44 Sta. 0-63+00 ure 2.5-58 Graphic Log Hole 45 Sta. 0-64+00 ure 2.5-59 Graphic Log Hole 46 Sta. 0-65+00 ure 2.5-60 Graphic Log Hole 47 Sta. 0-66+00 ure 2.5-61 Graphic Log Hole 48 Sta. P-60+00 ure 2.5-62 Graphic Log Hole 49 Sta. P-62+00 (Sheet 1 of 4) ure 2.5-63 Graphic Log Hole 50 Sta. P-63+00 ure 2.5-64 Graphic Log Hole 51 Sta. P-64+00 ure 2.5-65 Graphic Log Hole 52 Sta. P-65+00 ure 2.5-66 Graphic Log Hole 53 Sta. P-66+00 ure 2.5-67 Graphic Log Hole 54 Sta. P-68+00 ure 2.5-68 Graphic Log Hole 55 Sta. R-62+00 ure 2.5-69 Graphic Log Hole 56 Sta. R-64+00 ure 2.5-70 Special Studies Layout And Summary ure 2.5-71 (Please see Figures DVD for Actual Figure) ure 2.5-72 3-D Elastic Properties Tabulation Sta. L-61+00 Depth 32.0 - 46.5 ure 2.5-73 3-D Elastic Properties Tabulation Sta. L-61+00 Depth 47.0 - 61.5 ure 2.5-74 3-D Elastic Properties Tabulation Sta. L-61+00 Depth 62.0 - 76.5 ure 2.5-75 3-D Elastic Properties Tabulation Sta. L-61+00 Depth 77.0 - 91.5 ure 2.5-76 3-D Elastic Properties Tabulation Sta. L-61+00 Depth 92.0 - 106.5 ure 2.5-77 3-D Elastic Properties Tabulation Sta. L-61+00 Depth 107.0 - 121.5 ure 2.5-78 3-D Elastic Properties Tabulation Sta. L-61+00 Depth 122.0 - 136.5 ure 2.5-79 3-D Elastic Properties Tabulation Sta. L-61+00 Depth 137.0 - 151.5 ure 2.5-80 3-D Elastic Properties Tabulation Sta. L-61+00 Depth 152.0 - 166.5 ure 2.5-81 3-D Elastic Properties Tabulation Sta. L-61+00 Depth 167.0 - 176.0 ure 2.5-82 Graphic Log and Elastic Moduli Sta. M-63+00 ure 2.5-83 3-D Elastic Properties Tabulation Sta. M-63+00 Depth 44.0 - 58.5 ure 2.5-84 3-D Elastic Properties Tabulation Sta. M-63+00 Depth 59.0 - 73.5 ure 2.5-85 3-D Elastic Properties Tabulation Sta. M-63+00 Depth 74.0 - 88.5 ure 2.5-86 3-D Elastic Properties Tabulation Sta. M-63+00 Depth 89.0 - 90.0 v List of Figures

tion Title ure 2.5-87 Graphic Log and Elastic Moduli Sta. N-6l+00 ure 2.5-88 3-D Elastic Properties Tabulation Sta. N-61+00 Depth 35.0 - 49.5 ure 2.5-89 3-D Elastic Properties Tabulation Sta. N-61+00 Depth 50.0 - 64.5 ure 2.5-90 3-D Elastic Properties Tabulation Sta. N-61+00 Depth 65.0 - 79.5 ure 2.5-91 3-D Elastic Properties Tabulation Sta. N-61+00 Depth 80.0 - 92.0 ure 2.5-92 Graphic Log and Elastic Modula Sta. N-62+00 ure 2.5-93 3-D Elastic Properties Tabulation Sta. N-62+00 Depth 45.0 - 59.5 ure 2.5-94 3-D Elastic Properties Tabulation Sta. N-62+00 Depth 60.0 - 70.0 ure 2.5-95 Graphic Log and Elastic Moduli Sta. 0-60+00 ure 2.5-96 3-D Elastic Properties Tabulation Sta. 0-60+00 Depth 38.0 - 52.5 ure 2.5-97 3-D Elastic Properties Tabulation Sta. 0-60+00 Depth 53.0 -67.5 ure 2.5-98 3-D Elastic Properties Tabulation Sta. 0-60+00 Depth 68.0 - 80.0 ure 2.5-99 Graphic Log and Elastic Moduli Sta. 0-61+00 ure 2.5-100 3-D Elastic Properties Tabulation Sta. 0-61+00 Depth 37.0 - 51.5 ure 2.5-101 3-D Elastic Properties Tabulation Sta. 0-61+00 Depth 52.0 - 66.5 ure 2.5-102 3-D Elastic Properties Tabulation Sta. 0-61+00 Depth 67.0 - 81.5 ure 2.5-103 3-D Elastic Properties Tabulation Sta. 0-61+00 Depth 82.0 - 92.0 ure 2.5-104 Graphic Log And Elastic Moduli Sta. 0-62+00 ure 2.5-105 3-D Elastic Properties Tabulation Sta. 0-62+00 Depth 43.0 - 57.5 ure 2.5-106 3-D Elastic Properties Tabulation Sta. 0-62+00 Depth 58.0 - 72.5 ure 2.5-107 3-D Elastic Properties Tabulation Sta. 0-62+00 Depth 73.0 - 87.5 ure 2.5-108 3-D Elastic Properties Tabulation Sta. 0-62+00 Depth 88.0 - 101.0 ure 2.5-109 Cross-Hole Dynamic Sections And Summary ure 2.5-110 Plan View Geologic Map of Reactor, Auxiliary And Control Buildings ure 2.5-111 Plan View Geologic Map of Turbine Building ure 2.5-112 Geologic Section Along A+8 And A+14 Lines From T6 To T11 ure 2.5-113 Geologic Section Along N Line From Cl To C13 ure 2.5-114 Section Along A4+9.5 From T+3.5 To W+12.5 ure 2.5-115 Geologic Section and Panoramic Photograph Q-4 Line From A4-3 To A12+3 ure 2.5-116 Geologic Sections Auxiliary And Turbine Buildings ure 2.5-117 Geologic Sections And Panoramic Photographs (Unit 2) ure 2.5-118 Geologic Sections And Panoramic Photographs (Unit 1) ure 2.5-119 Geologic Sections and Panoramic Photographs of Reactor 2 East Perim-eter Wall ure 2.5-120 Geologic Section and Panoramic Photograph of Reactor 1 West Perim-eter Wall ure 2.5-121 Geologic Plan And Sections Intake Structure Foundation ure 2.5-122 Generalized Geologic Section And Soil Profile ure 2.5-123 Fault 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.

ure 2.5-124 Fault In Auxiliary Building Wall, Approximately 9 Feet West Of A5 and 6 Feet South of East-West Reactor Centerline. Fault Continues of Figures 2-xxv

tion Title Across SE Perimeter of Reactor #1. Viewed Southwest.

ure 2.5-125 Minor Thrust Fault and Associated One-Eighth Inch Clay Seam Located In East Foundation Cut at Q Line and C13+l2 Feet. Viewed East.

ure 2.5-126 Closeup of Reactor #1 Normal Fault at 72 Degrees. Viewed West.

ure 2.5-127 Closeup 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.

ure 2.5-128 Fault In Auxiliary Building at All And East-West Reactor Centerline.

Fault Continues NE Through NW Perimeter of Reactor #2 Building.

Viewed Northeast.

ure 2.5-129 Gravity or Normal Fault on Northeast Reactor #1 Perimeter at 233 De-grees. Fault Plane Dips North at 40 Degrees. Viewed West.

ure 2.5-130 Fault in Reactor #2 East Wall at Approximately 130 Degrees. Viewed East.

ure 2.5-131 Fault in Reactor #2 Cavity Wall at Approximately 354 Degrees. Eleva-tion 680.0 at Base. Viewed Southwest.

ure 2.5-132 Fault In South Wall of Discharge Channel Showing Truncation By Overlying Terrace Gravel Deposit.

ure 2.5-133 Fault In North Wall of Discharge Channel Showing Truncation By Ter-race Gravel Deposit.

ure 2.5-134 Fault Truncation by Terrace Gravel Deposit at 20 Feet East of A8 and 18.50 Feet North of Y. Elevation at Bench Cut is 706.35. Viewed North.

ure 2.5-135 Fault in Vertical Excavation Cut at 20 Feet East of A8 and 18.50 Feet North of Y. Viewed North.

ure 2.5-136 Inset Area. Blue-Grey Clay Seam Along Fault Trace Where Truncated by Terrace Gravel Deposit. Location: 20 Feet East of A8 And 18.50 Feet North of Y. Viewed North.

ure 2.5-137 Saprolite - 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.

ure 2.5-138 Site of Wood Specimen Collection for Carbon 14 Age Dating. Location is 3 Feet Above Terrace Gravel Deposit. Scale: Opened Brunton Com-pass = 8.5 Inches. Location: Approximately 18.51 North of Y at A5 Line. Approximate Elevation 717.5.

ure 2.5-139 Layout Diagram For Horizontal and Angle Holes ure 2.5-140 Plane Intersecting Disintegrated Shale Pocket ure 2.5-141 Plane View Onto The 673 Elevation ure 2.5-142 Plane View Onto The 671 Elevation ure 2.5-143 Drill Layout Diagram For Vertical Holes Viewed Onto The 671 Eleva-tion ure 2.5-144 Reactor 2 Grout Layout ure 2.5-145 Earthquake Epicenters ure 2.5-146 Major Earthquake In United States Through 1972 ure 2.5-147 Isoseismal Map Maximum Effects 1811-1812 New Madrid Earthquake ure 2.5-148 Isoseismal Map 1811 New Madrid Earthquake vi List of Figures

tion Title ure 2.5-149 Felt Area Maps ure 2.5-150 Isoseismal Map 1886 Charleston, S.C. Earthquake ure 2.5-151 Felt Area Map East Tennessee Earthquake of April 17, 1913 ure 2.5-152 Isoseismal Map 1916 Southern Appalachian Earthquake ure 2.5-153 Isoseismal Map 1916 Alabama Earthquake ure 2.5-154 Isoseismal Map 1924 Southern Appalachian Earthquake ure 2.5-155 Felt Area Map 1940 Chattanooga Earthquake ure 2.5-156 Isoseismal Map 1968 Southern Illinois Earthquake ure 2.5-157 Felt Area Map East Tennessee Earthquake July 13, 1969 ure 2.5-158 Isoseismal Map Elsgood, West Virginia Earthquake (November 20, 1969) ure 2.5-159 Isoseismal Map Maryville-Alcoa Earthquake November 30, 1973 ure 2.5-160 Seismic Reflection Profile ure 2.5-161 Index Map - All Earthquakes Latitude 32.5-38.5 North Longitude 80.5-89.0 West ure 2.5-162 Earthquake Listing All Earthquakes Latitude 32.5-38.5 North Longi-tude 80.5-89.0 West ure 2.5-163 Earthquake Listing All Earthquakes Latitude 32.5-38.5 North Longi-tude 80.5-89.0 West ure 2.5-164 Earthquake Listing All Earthquakes Latitude 32.5-38.5 North Longi-tude 80.5-89.0 West ure 2.5-165 Earthquake Listing All Earthquakes Latitude 32.5-38.5 North Longi-tude 80.5-89.0 West ure 2.5-166 Earthquake Listing All Earthquakes Latitude 32.5-38.5 North Longi-tude 80.5-89.0 West ure 2.5-167 Earthquake Listing All Earthquakes Latitude 32.5-38.5 North Longi-tude 80.5-89.0 West ure 2.5-168 Earthquake Listing All Earthquakes Latitude 32.5-38.5 North Longi-tude 80.5-89.0 West ure 2.5-169 Index Map -Earthquakes 4.3 Richter or Greater Latitude 32.5-38.5 North Longitude 80.5-89.0 West ure 2.5-170 Earthquake Listing 4.3 Richter or Greater Latitude 32.5-38.5 North Longitude 80.5-89.0 West ure 2.5-171 Earthquake Listing 4.3 Richter or Greater Latitude 32.5-38.5 North Longitude 80.5-89.0 West ure 2.5-172 Earthquake Listing 4.3 Richter or Greater Latitude 32.5-38.5 North Longitude 80.5-89.0 West ure 2.5-173 Index Map -Earthquakes 4.3 Richter or Greater Latitude 30-37 North Longitude 78-92 West ure 2.5-174 Earthquakes Listing 4.3 Richter or Greater Latitude 30-37 North Longi-tude 78-92 West ure 2.5-175 Earthquakes Listing 4.3 Richter or Greater Latitude 30-37 North Longi-tude 78-92 West ure 2.5-176 Earthquakes Listing 4.3 Richter or Greater Latitude 30-37 North Longi-of Figures 2-xxvii

tion Title tude 78-92 West ure 2.5-177 Earthquakes Listing 4.3 Richter or Greater Latitude 30-37 North Longi-tude 78-92 West ure 2.5-178 Earthquakes Listing 4.3 Richter or Greater Latitude 30-37 North Longi-tude 78-92 West ure 2.5-179 Earthquakes Listing 4.3 Richter or Greater Latitude 30-37 North Longi-tude 78-92 West ure 2.5-180 Earthquakes Listing 4.3 Richter or Greater Latitude 30-37 North Longi-tude 78-92 West ure 2.5-181 Index Map -Earthquakes 6.3 Richter or Greater Latitude 30-37 North Longitude 78-92 West ure 2.5-182 Earthquakes Listing 6.3 Richter Or Greater Latitude 30-37 Longitude 78-92 West ure 2.5-183 Earthquake Listing List of References ure 2.5-184 Earthquake Listing Notes ure 2.5-185 Yard Soil Borings Location Plan ure 2.5-185a Yard Soil Borings Location Plan ure 2.5-186 Transformer Yard & Switchyard Soil Investigation ure 2.5-187 Cooling Towers Soil Investigation ure 2.5-188 Pumping Station Foundation Investigation ure 2.5-189 Office & Service Building Foundation Investigation ure 2.5-190 Diesel Generator Building Sections AA & BB Foundation Investigation ure 2.5-191 Essential Cooling Water Supply Soil Investigation ure 2.5-192 Intake Channel, Section DD Foundation Investigation ure 2.5-193 Intake Channel, Section EE Foundation Investigation ure 2.5-194 Intake Channel, Section CC Foundation Investigation ure 2.5-195 Intake Channel, Section FF Foundation Investigation ure 2.5-196 Class IE Conduits Soil Investigation ure 2.5-197 Class IE Conduits Soil Investigation ure 2.5-198 Soil Investigation Borings For ERCW & HPFP Systems ure 2.5-199 Soil Investigation Borings For ERCW & HPFP Systems ure 2.5-200 Soil Investigation Borings For ERCW & HPFP Systems ure 2.5-201 Soil Investigation Borings For ERCW & HPFP Systems ure 2.5-202 Soil Investigation Borings For ERCW & HPFP Systems ure 2.5-203 Intake Channel Trench ure 2.5-204 Intake Channel Test 1 ure 2.5-205 Intake Channel Strength Evaluation Test 2 ure 2.5-206 Class IE Conduit Alignment Q (Unconsolidated, Undrained, Undis-turbed) Samples.

ure 2.5-207 ERCW Piping and IE Conduit Alignments R (Consolidated -

Undrained) Silt and Clay Samples Natural Moisture Content ure 2.5-208 Class IE Conduit Alignment S-Direct Shear ure 2.5-209 Type 1-Soft Shale Type 2-Hard Shale -Type 3 Limestone ure 2.5-210 Location of Test Holes viii List of Figures

tion Title ure 2.5-211 Deformation Moduli From Menard Pressuremeter Tests ure 2.5-212 Comparison of Moduli Obtained With Menard Pressuremeter and Birdwell 3D Sonic Logger ure 2.5-213 Influence Factors For Determining Stresses Below The Center of Flex-ible Circular Footing 10, 50, 100, and 200 Ft. in Diameter ure 2.5-214 Eia For Holes Tested With Menard Pressuremeter ure 2.5-215 Settlement at Center of Flexible Circular Footing Loaded With SKSF ure 2.5-216 Correlation Used To Estimate Average Moduli For Holes Where De-tailed Calculations Were Not Made.

ure 2.5-217 Distribution of Deformation Moduli For 10 Foot Diameter Footings ure 2.5-218 Simplified Plan of Lock foundation Showing Location of Modulus Cal-culations ure 2.5-219 Settlement of Face of Block R-10 (Point F, fig. 16) ure 2.5-220 Yard Soil Investigations Borrow Soils ure 2.5-221 Yard Soil Investigations Borrow Soils ure 2.5-221a Yard Soil Investigations Borrow Soils ure 2.5-222 Borrow Investigation (Please See Figures DVD for Actual Figure) ure 2.5-223 Additional Borrow Exploration ure 2.5-224 Additional Borrow Area 4 ure 2.5-225 Main Plant Excavation & Backfill Category I Structures ure 2.5-226 Main Plant Excavation & Backfill Category I Structures ure 2.5-226a Excavation and Backfill Category I Structures ure 2.5-227 Typical In-Situ Soil Dynamics Measurements Layout & Section ure 2.5-228 Soil Dynamics Intake Channel Station 13 + 26E, 21 + l2S ure 2.5-229 Soil Dynamics Intake Channel Station 14 + 27E, 24 + l2S ure 2.5-230 Soil Dynamics Intake Channel Station 12 + 67E, 25 + 32S ure 2.5-231 Soil Dynamics Intake Channel Station 10 + 07E, 23 + 53S ure 2.5-232 Seismic Refraction Dynamic Properties Intake Channel ure 2.5-233 Soil Dynamics Diesel Generator Building Down Hole Seismic 8 Refrac-tion Measurement ure 2.5-233a Class A Backfill -Shear Modulus Reduction with Shear Strain ure 2.5-233b Class A Backfill -Damping Ratio Variation with Shear Strain ure 2.5-233c Crushed Stone Backfill - Shear Modulus Reduction with Shear Strain ure 2.5-233d Crushed Stone Backfill - Damping Ratio Variation with Shear Strain ure 2.5-233e In Situ Cohesive Soils - Shear Modulus Reduction with Shear Strain ure 2.5-233f In Situ Cohesive Soils - Damping Ratio Variation with Shear Strain ure 2.5-233g Non-Plastic In Situ Soil - Shear Modulus Reduction with Shear Strain ure 2.5-233h Non-Plastic In Situ Soils - Damping Ratio Variation with Shear Strain ure 2.5-233i Basal Gravel - Shear Modulus Reduction with Shear Strain ure 2.5-233j Basal Gravel - Damping Ratio Variation with Shear Strain ure 2.5-233k Weathered Shale - Shear Modulus and Damping Variation with Shear Strain ure 2.5-234 Main Plant Borrow Areas, Moisture - Penetration Test ure 2.5-235 Compaction Test Borrow Areas (Family Of Curves) of Figures 2-xxix

tion Title ure 2.5-236A Operating Basis Earthquake Response Spectra For Rock Support Struc-tures ure 2.5-236b Safe Shutdown Earthquake Response Spectra For Rock Support Struc-tures ure 2.5-237 Intake Channel Seismic Stability Analysis ure 2.5-238 Static Design Case 2 ure 2.5-239 Intake Channel-Lateral Excavation & Replacement ure 2.5-240 Wedge Used To Determine Horizontal Displacement of The Intake Channel By Newmark's Method ure 2.5-241 ERCW Piping Alignment Q (Unconsolidated Undrained - Undisturbed Samples) ure 2.5-242 ERCW Piping Alignment S (Direct Shear) Undisturbed Samples ure 2.5-243 Deleted by Amendment 71 ure 2.5-244 Borrow Area 4 Q - (Unconsolidated - Undrained) 95% STD Proctor Density 3% Above Optimum Moisture Remolded Samples ure 2.5-245 Watts Bar Nuclear Plant Borrow Area 4R - (Consolidate Undrained) 95% STD Proctor Density 3% Below Optimum Moisture Remolded Samples ure 2.5-246 Borrow Area 4 S -(Direct Shear) 95% STD Proctor Density 3% Below Optimum Moisture Remolded Samples ure 2.5-247 Intake Channel Q - (Unconsolidated - Undrained - Undisturbed Sam-ples) Silty Sands ure 2.5-248 Intake Channel Q - (Unconsolidated-Undrained) Undisturded Samples Lean Clays ure 2.5-249 Intake Channel R - (Consolidated-Undrained) Undisturbed Samples Silty Sands ure 2.5-250 Intake Channel R - (Consolidated-Undrained) - Undisturbed Samples Lean Clays ure 2.5-251 Intake Channel Q - (Unconsolidated Undrained) Remolded Samples 95% SDT Proctor Density 4% Above Optimum Moisture ure 2.5-252 Site Studies Intake Channel Additional Soils Investigation ure 2.5-253 Intake Channel Additional Soil Investigation Section AA ure 2.5-254 Intake Channel Additional Soil Investigation Section BB ure 2.5-255 Intake Channel Additional Soil Investigation Section CC ure 2.5-256 Intake Channel - Lateral Excavation and Replacement Downstream Side of Intake Channel with Bedrock at 656 ure 2.5-257 Intake Channel - Lateral Excavation and Replacement Downstream Side of Intake Channel with Bedrock at 650 ure 2.5-258 Intake Channel - Lateral Excavation and Replacement Upstream Reser-voir End with Rockfill Placed at 665 ure 2.5-259 Intake Channel - Lateral Excavation and Replacement Downstream Reservoir End With Rockfill Placed at El. 650 ure 2.5-260 Soil Profile - Borrow Area 7, Boring PAH-1 ure 2.5-261 Soil Profile - Borrow Area 7, Boring PAH-2 x List of Figures

tion Title ure 2.5-262 Soil Profile - Borrow Area 7, Boring PAH-3 ure 2.5-263 Soil Profile - Borrow Area 7, Boring PAH-4 ure 2.5-264 Soil Profile - Borrow Area 7, Boring PAH-5 ure 2.5-265 Soil Profile - Borrow Area 7, Boring PAH-6 ure 2.5-266 Soil Profile - Borrow Area 7, Boring PAH-7 ure 2.5-267 Soil Profile - Borrow Area 7, Boring PAH-8 ure 2.5-268 Soil Profile - Borrow Area 7, Boring PAH-9 (SS, PA, HA, TP, Boring) ure 2.5-269 Soil Profile - Borrow Area 7, Boring PAH-10 ure 2.5-270 Soil Profile - Borrow Area 7, Boring PAH-11 ure 2.5-271 Compaction Test (Family of Curves) - Borrow Area 7 ure 2.5-272 Moisture - Penetration Test - Borrow Area 7 ure 2.5-273 Yard Category I ERCW Piping and Conduits Plan ure 2.5-274 Soil Profile (SS, PA, HA, TP, Boring) 1E Conduit Banks ure 2.5-275 Soil Profile (SS, PA, HA, TP, Boring) 1E Conduit Banks ure 2.5-276 Soil Profile (SS, PA, HA, TP, Boring) IE Conduit Banks Sheet 1 of 2 ure 2.5-276 Soil Profile (SS, PA, HA, TP, Boring) ID Conduit Banks Sheet 2 of 2 ure 2.5-277 Soil Profile (SS, PA, HA, TP, Boring) ID Conduit Banks ure 2.5-278 Soil Profile (SS, PA, HA, TP, Boring) ID Conduit Banks ure 2.5-279 Soil Profile (SS, PA, HA, TP, Boring) ID Conduit Banks ure 2.5-280 Soil Profile (SS, PA, HA, TP, Boring) ID Conduit Banks ure 2.5-281 (Please see Figures DVD for Actual Figure) (Sheet 1 of 2) ure 2.5-281 (Please see Figures DVD for Actual Figure) (Sheet 2 of 2) ure 2.5-282 Soil Profile ure 2.5-283 Soil Profile (Sheet 1 of 2) ure 2.5-283 Soil Profile (Sheet 2 of 2) ure 2.5-284 Soil Profile ure 2.5-285 Soil Profile (Sheet 1 of 2) ure 2.5-285 Soil Profile (Sheet 2 of 2) ure 2.5-286 Soil Profile (Sheet 1 of 2) ure 2.5-286 Soil Profile (Sheet 2 of 2) ure 2.5-287 Soil Profile (Sheet 1 of 2) ure 2.5-287 Soil Profile (Sheet 2 of 2) ure 2.5-288 Soil Profile ure 2.5-289 Soil Profile (Sheet 1 of 2) ure 2.5-289 Soil Profile (Sheet 2 of 2) ure 2.5-290 Soil Profile ure 2.5-291 Soil Profile ure 2.5-292 Soil Profile (Sheet 1 of 2) ure 2.5-292 Soil Profile (Sheet 2 of 2 ure 2.5-293 Soil Profile ure 2.5-294 Soil Profile (Sheet 1 of 2) ure 2.5-294 Soil Profile (Sheet 2 of 2) ure 2.5-295 Soil Profile ure 2.5-296 Soil Profile (Sheet 1 of 2) of Figures 2-xxxi

tion Title ure 2.5-296 Soil Profile (Sheet 2 of 2) ure 2.5-297 Soil Profile (Sheet 1 of 2) ure 2.5-297 Soil Profile (Sheet 2 of 2) ure 2.5-298 Soil Profile (Sheet 1 of 2) ure 2.5-298 Soil Profile (Sheet 2 of 2) ure 2.5-299 Soil Profile (Sheet 1 of 2) ure 2.5-299 Soil Profile (Sheet 2 of 2) ure 2.5-300 Soil Profile (Sheet 1 of 2) ure 2.5-300 Soil Profile (Sheet 2 of 2) ure 2.5-301 Soil Profile ure 2.5-302 Soil Profile (Sheet 1 of 2) ure 2.5-302 Soil Profile (Sheet 2 of 2) ure 2.5-303 Soil Profile (Sheet 1 of 2) ure 2.5-303 Soil Profile (Sheet 2 of 2) ure 2.5-304 Soil Profile (Sheet 1 of 2) ure 2.5-304 Soil Profile (Sheet 2 of 2) ure 2.5-305 Soil Profile (Sheet 1 of 2) ure 2.5-305 Soil Profile (Sheet 2 of 2) ure 2.5-306 Soil Profile ure 2.5-307 Soil Profile (Sheet 1 of 2) ure 2.5-307 Soil Profile (Sheet 2 of 2) ure 2.5-308 Soil Profile (Sheet 1 of 2) ure 2.5-308 Soil Profile (Sheet 2 of 2) ure 2.5-309 Soil Profile ure 2.5-310 Soil Profile ure 2.5-311 Soil Profile ure 2.5-312 Soil Profile ure 2.5-313 Soil Profile ure 2.5-314 Soil Profile ure 2.5-315 Soil Profile ure 2.5-316 Soil Profile (Sheet 1 of 1) ure 2.5-317 Soil Profile ure 2.5-318 Soil Profile ure 2.5-319 Soil Profile ure 2.5-320 Soil Profile ure 2.5-321 Soil Profile (Sheet 1 of 2) ure 2.5-321 Soil Profile (Sheet 2 of 2) ure 2.5-322 Soil Profile ure 2.5-323 Soil Profile ure 2.5-324 Soil Profile ure 2.5-325 Soil Profile ure 2.5-326 Soil Profile (Sheet 1 of 2) ure 2.5-326 Soil Profile (Sheet 2 of 2) ure 2.5-327 Soil Profile (Sheet 1 of 2) xii List of Figures

tion Title ure 2.5-327 Soil Profile (Sheet 2 of 2) ure 2.5-328 Soil Profile (Sheet 1 of 2) ure 2.5-328 Soil Profile (Sheet 2 of 2) ure 2.5-329 Soil Profile ure 2.5-330 Soil Profile (Sheet 1 of 2) ure 2.5-330 Soil Profile (Sheet 2 of 2) ure 2.5-331 Blank Page ure 2.5-332 Soil Profile (Sheet 1 of 2) ure 2.5-332 Soil Profile (Sheet 2 of 2) ure 2.5-333 Soil Profile (Sheet 1of 2) ure 2.5-333 Soil Profile (Sheet 2of 2) ure 2.5-334 Soil Profile (Sheet 1 of 2) ure 2.5-334 Soil Profile (Sheet 2 of 2) ure 2.5-335 Soil Profile (Sheet 1 of 2) ure 2.5-335 Soil Profile (Sheet 2 of 2) ure 2.5-336 Soil Profile (Sheet 1 of 2) ure 2.5-336 Soil Profile (Sheet 2 of 2) ure 2.5-337 Soil Profile ure 2.5-338 Soil Profile ure 2.5-339 ERCW Route Liquefaction Evaluation Graphic Logs No. 50 & 65 ure 2.5-340 ERCW Liquefaction ure 2.5-341 ERCW Liquefaction ure 2.5-342 Liquefaction ure 2.5-343 Liquefaction ure 2.5-344 Liquefaction ure 2.5-345 Liquefaction ure 2.5-346 Liquefaction ure 2.5-347 Liquefaction ure 2.5-348 Liquefaction ure 2.5-349 Liquefaction ure 2.5-350 Liquefaction ure 2.5-351 Liquefaction ure 2.5-352 Liquefaction ure 2.5-353 Results Of Stress Controlled Cyclic Triaxial Tests On ERCW Route Soils ure 2.5-354 Liquefaction Study ERCW Pipeline ure 2.5-355 Liquefaction Study ERCW Pipeline ure 2.5-356 Liquefaction Study ERCW Pipeline ure 2.5-357 Liquefaction Study ERCW Pipeline ure 2.5-358 Additional Soil Investigations Category I Soil Supported Structures ure 2.5-359 Category I Soil Supported Structures Soil Investigation ure 2.5-360 Category I Soil Supported Structures Soil Investigation ure 2.5-361 Category I Soil Supported Structures Soil Investigation ure 2.5-362 Category I Soil Supported Structures Soil Investigation of Figures 2-xxxiii

tion Title ure 2.5-363 Category I Soil Supported Structures Soil Investigation ure 2.5-364 Category I Soil Supported Structures Soil Investigation ure 2.5-365 Category I Supported Structures S-Direct Shear Test Remolded Basal Gravel ure 2.5-366 Soil Supported Structures ure 2.5-367 Soil Supported Structures ure 2.5-368 Soil Supported Structures ure 2.5-369 Soil Supported Structures ure 2.5-370 Soil Supported Structures ure 2.5-371 Soil Supported Structures ure 2.5-372 Gravel Boring No. 125 ure 2.5-373 Gravel Boring No. 129 ure 2.5-374 Watts Bar Nuclear Plant Category I Soil Supported Structures Q - ( Un-consolidated - Undrained)

Test Fine Grained Soils (Undisturbed Samples) ure 2.5-375 Watts Bar Nuclear Plant Category I Soil Supported Structures R (Total)

- ( Consolidated - Undrained)

Test Fine Grained Soils (Undisturbed Samples) ure 2.5-376 Watts Bar Nuclear Plant Category I Soil Supported Structure R (Effec-tive) -

(Consolidated -Undrained) Test Fine Grained Soils (Undisturbed Sam-ples) ure 2.5-377 Soil Profile ure 2.5-378 Soil Profile ure 2.5-379 Soil Profile ure 2.5-380 Soil Profile ure 2.5-381 Soil Profile ure 2.5-382 Soil Profile ure 2.5-383 Soil Profile (Sheet 1 of 2) ure 2.5-383 Soil Profile (Sheet 2 of 2) ure 2.5-384 Soil Profile (Sheet 1 of 2) ure 2.5-384 Soil Profile (Sheet 2 of 2) ure 2.5-385 Soil Profile ure 2.5-386 Soil Profile ure 2.5-387 Soil Profile ure 2.5-388 Soil Profile ure 2.5-389 Soil Profile ure 2.5-390 Soil Profile ure 2.5-391a Soil Profile ure 2.5-392 Soil Profile xiv List of Figures

tion Title ure 2.5-393 Soil Profile ure 2.5-394 Soil Profile ure 2.5-395 Soil Profile ure 2.5-396 Soil Profile ure 2.5-397 Soil Profile ure 2.5-398 Soil Profile ure 2.5-399 Soil Profile ure 2.5-400 Soil Profile ure 2.5-401 Soil Profile ure 2.5-402 Soil Profile ure 2.5-403 Soil Profile ure 2.5-404 Soil Profile ure 2.5-405 Soil Profile ure 2.5-406 Soil Profile ure 2.5-407 Soil Profile ure 2.5-408 Soil Profile ure 2.5-409 Soil Profile ure 2.5-410 Soil Profile ure 2.5-411 Soil Profile ure 2.5-412 Soil Profile ure 2.5-413 Soil Profile ure 2.5-414 Soil Profile ure 2.5-415 Soil Profile ure 2.5-416 Soil Profile ure 2.5-417 Soil Profile ure 2.5-418 Soil Profile ure 2.5-419 Soil Profile ure 2.5-420 Soil Profile ure 2.5-421 Soil Profile ure 2.5-422 Soil Profile ure 2.5-423 Soil Profile ure 2.5-424 Soil Profile ure 2.5-425 Soil Profile ure 2.5-426 Soil Profile ure 2.5-427 Soil Profile ure 2.5-428 Soil Profile ure 2.5-429 Soil Profile ure 2.5-430 Soil Profile ure 2.5-431 Soil Profile ure 2.5-432 Soil Profile ure 2.5-433 Soil Profile ure 2.5-434 Soil Profile ure 2.5-435 Soil Profile ure 2.5-436 Soil Profile of Figures 2-xxxv

tion Title ure 2.5-437 Soil Profile ure 2.5-438 Soil Profile ure 2.5-439 Soil Profile ure 2.5-440 Soil Profile ure 2.5-441 Soil Profile ure 2.5-442 Soil Profile ure 2.5-443 Soil Profile ure 2.5-444 Soil Profile ure 2.5-445 Soil Profile ure 2.5-446 Soil Profile ure 2.5-447 Soil Profile ure 2.5-448 Soil Profile ure 2.5-449 Soil Profile ure 2.5-450 Soil Profile ure 2.5-451 Soil Profile ure 2.5-452 Soil Profile ure 2.5-453 Soil Profile ure 2.5-454 Soil Profile ure 2.5-455 Soil Profile ure 2.5-456 Soil Profile ure 2.5-457 Soil Profile ure 2.5-458 Soil Profile ure 2.5-459 Soil Profile ure 2.5-460 Soil Profile ure 2.5-461 Soil Profile ure 2.5-462 Soil Profile ure 2.5-463 Soil Profile ure 2.5-464 Soil Profile ure 2.5-465 Soil Profile ure 2.5-466 Soil Profile ure 2.5-467 Soil Profile ure 2.5-468 Soil Profile ure 2.5-469 Soil Profile ure 2.5-470 Soil Profile ure 2.5-471 Soil Profile ure 2.5-472 Soil Profile ure 2.5-473 Soil Profile ure 2.5-474 Soil Profile ure 2.5-475 Soil Profile ure 2.5-476 Soil Profile ure 2.5-477 Soil Profile ure 2.5-478 Soil Profile ure 2.5-479 Soil Profile ure 2.5-480 Soil Profile xvi List of Figures

tion Title ure 2.5-481 Soil Profile ure 2.5-482 Soil Profile ure 2.5-483 Soil Profile ure 2.5-484 Soil Profile ure 2.5-485 Soil Profile ure 2.5-486 Soil Profile ure 2.5-487 Soil Profile ure 2.5-488 Soil Profile ure 2.5-489 Soil Profile ure 2.5-490 Soil Profile ure 2.5-491 Soil Profile ure 2.5-492 Soil Profile ure 2.5-493 Soil Profile ure 2.5-494 Soil Profile ure 2.5-495 Soil Profile ure 2.5-496 Soil Profile ure 2.5-497 Soil Profile ure 2.5-498 Soil Profile ure 2.5-499 Soil Profile ure 2.5-500 Soil Profile ure 2.5-501 Soil Profile ure 2.5-502 Soil Profile ure 2.5-503 Soil Profile ure 2.5-504 Soil Profile ure 2.5-505 Soil Profile ure 2.5-506 Soil Profile ure 2.5-507 Soil Profile ure 2.5-508 Soil Profile ure 2.5-509 Soil Profile ure 2.5-510 Soil Profile ure 2.5-511 Soil Profile ure 2.5-512 Soil Profile ure 2.5-513 Soil Profile ure 2.5-514 Soil Profile ure 2.5-515 Soil Profile ure 2.5-516 Soil Profile ure 2.5-517 Soil Profile ure 2.5-518 Soil Profile ure 2.5-519 Soil Profile ure 2.5-520 Watts Bar Nuclear Plant Underground Barrier Trench A Backfill R -

(Consolidated -Undrained) 95% STD Proctor Density (ASTM D698) 3% Below Optimum Moisture ure 2.5-521 Watts Bar Nuclear Plant Underground Barrier Trench A Backfill R (

Consolidated -Undrained) 100% STD Proctor Density (ASTM D698) of Figures 2-xxxvii

tion Title 3% Below Optimum Moisture Content ure 2.5-522 Watts Bar Nuclear Plant Underground Barrier Trench B Backfill R (

Consolidated - Undrained) 95% STD Proctor Density (ASTM D698) 3% Below Optimum Moisture Content ure 2.5-523 Watts Bar Nuclear Plant Underground Barrier Trench B Backfill R (

Consolidated -Undrained) 100% STD Proctor Density (ASTM D698) 3% Below Optimum Moisture Content ure 2.5-524 ERCW Liquefaction Trench A Borrow ure 2.5-525 ERCW Liquefaction Trench A Supplemental Borrow ure 2.5-526 ERCW Liquefaction Trench B ure 2.5-527 ERCW Liquefaction Borrow Area 9 ure 2.5-528 ERCW Liquefaction Borrow Area 10 ure 2.5-529 ERCW Liquefaction Borrow Area 11 ure 2.5-530 ERCW Liquefaction Borrow Area 12 ure 2.5-531 ERCW Liquefaction Borrow Area 13 ure 2.5-532 ERCW Liquefaction Borrow Area 2C ure 2.5-533 ERCW Liquefaction Borrow Area 2C ure 2.5-534 ERCW Liquefaction Trench A ure 2.5-535 ERCW Liquefaction Trench A Supplemental Borrow ure 2.5-536 ERCW Liquefaction Trench B ure 2.5-537 ERCW Liquefaction Borrow Area 9 ure 2.5-538 ERCW Liquefaction Borrow Area 10 ure 2.5-539 ERCW Liquefaction Borrow Area 11 ure 2.5-540 ERCW Liquefaction Borrow Area 12 ure 2.5-541 ERCW Liquefaction Borrow Area 13 ure 2.5-542 ERCW Liquefaction Borrow Area 2C ure 2.5-543 ERCW Liquefaction Borrow Area 2C ure 2.5-544 Watts Bar Nuclear Plant Granular Fill (1032) Q-(Unconsolidated-Undrained) 70% Relative Density (ASTM D2049) ure 2.5-545 Watts Bar Nuclear Plant Granular Fill (1032) S-Direct Shear 70% Rel-ative Density (ASTM 02049) ure 2.5-546 Watts Bar Nuclear Plant Granular Fill (1032) Q- (Unconsolidated -

Undrained) 80% Relative Density (ASTM D2049) ure 2.5-547 Watts Bar Nuclear Plant Granular Fill (1032) R- (Consolidated-Undrained) S-Direct: Shear 80% Relative Density (ASTM D2049) ure 2.5-548 Summary. of Granular Fill Test Data -Relacive"Density Diesel Genera-tor Building ure 2.5-549 ERCW Pipeline Section A-A (Please see Figures DVD for Actual Fig-ure) (Sheet 1 of 4) ure 2.5-549 ERCW Pipeline Section A-A (Please see Figures DVD for Actual Fig-ure) (Sheet 2 of 4) ure 2.5-549 ERCW Pipeline Section A-A (Please see Figures DVD for Actual Fig-ure) (Sheet 3 of 4) ure 2.5-549 ERCW Pipeline Section A-A (Please see Figures DVD for Actual Fig-xviii List of Figures

tion Title ure) (Sheet 4 of 4) ure 2.5-550 ERCU Pipeline Section B-B (Please see Figures DVD for Actual Fig-ure) ure 2.5-551 ERCU Pipeline Section C-C (Please see Figures DVD for Actual Fig-ure) ure 2.5-552 ERCW Pipeline Section D-D ure 2.5-553 ERCW Pipeline Section E-E ure 2.5-554 Category I Electrical Conduits Section F-F (Please see Figures DVD for Actual Figure)(Sheet 1 of 2) ure 2.5-554 Category I Electrical Conduits Section F-F (Please see Figures DVD for Actual Figure)(Sheet 2 of 2) ure 2.5-555 Category I Electrical Conduits Section G-G (Please see Figures DVD for Actual Figure) ure 2.5-556 Category I Electrical Conduits Section H-H (Please see Figures DVD for Actual Figure) ure 2.5-557 Class IE Conduit ure 2.5-558 Class IE Conduit ure 2.5-559 Class IE Conduit ure 2.5-560 Class IE Conduit ure 2.5-561 Class IE Conduit ure 2.5-562 Class IE Conduit ure 2.5-563 Class IE Conduit ure 2.5-564 ERCU & HPFP System ure 2.5-565 ERCU & HPFP System ure 2.5-566 Intake Channel Grain Size Analysis ure 2.5-567 ERCW Piping System - Generalized Profile TVA DWG NO. 604K1009 RO ure 2.5-568 ERCW Piping System - Generalized Profile TVA DWG NO. 604K1010 RO ure 2.5-569 One-Dimensional Soil Profile Used for Liquefaction Evaluation ure 2.5-570 Comparison of Induced Shear Stress and Shear Stress Required to Cause 5% Strain and Resulting Factors Of Safety With Depth Below Ground Surface ure 2.5-571 ERCW Pipeline Section A-A (Please See Figures DVD For Actual Figure)(Sheet 1 of 4) ure 2.5-571 ERCW Pipeline Section A-A (Please See Figures DVD For Actual Figure)(Sheet 2 of 4) ure 2.5-571 ERCW Pipeline Section A-A (Please See Figures DVD For Actual Figure)(Sheet 3 of 4) ure 2.5-571 ERCW Pipeline Section A-A (Please See Figures DVD For Actual Figure)(Sheet 4 of 4) ure 2.5-572 ERCW Pipeline Section B-B ure 2.5-573 (Please see Figures DVD for Actual Figure) ure 2.5-574 ERCW Pipeline Section D-D of Figures 2-xxxix

tion Title ure 2.5-575 ERCW Pipeline Section E-E ure 2.5-576 Category I Electrical Conduits Section F-F (Please see Figures DVD for Actual Figure)(Sheet 1 of 2) ure 2.5-576 Category I Electrical Conduits Section F-F (Please see Figures DVD for Actual Figure)(Sheet 2 of 2) ure 2.5-577 Category I Electrical Conduits Section G-G (Please see Figures DVD for Actual Figure) ure 2.5-578 Category I Electrical Conduits Section H-H (Please see Figures DVD for Actual Figure) ure 2.5-579 Miscellaneous ERCW Piping and IE Conduit Soil Borings (Please See Figures DVD For Actual Figure) ure 2.5-580 Yard Underground Barriers for Potential Soil Liquefaction TVA DWGNO. 10N213-1 R1 ure 2.5-581 Yard Underground Barriers for Potential Soil Liquefaction TVA DWGNO. 10N213-2 R6 ure 2.5-582 Yard Category I ERCW Piping and Conduits - Plan ure 2.5-583 Remedial Treatment for Potential Soil Liquefaction -Stability Analysis Summary (Please See Figures DVD For Actual Figure) ure 2.5-584 Finished Grading - Underground Barrier As-Built Cross-Sections ure 2.5-585 Powerhouse -Settlement Stations -Bench Mark Assembly ure 2.5-586 Settlement VS. Time For Unit 1 Reactor Building ure 2.5-587 Settlement VS. Time For Unit 2 Reactor Building ure 2.5-588 Maximum Settlement -Auxiliary Building Settlement Station 10; Mini-mum Settlement -Auxiliary Building Settlement Station 20 (1973-1982)

(Please see Figures DVD for Actual Figure) ure 2.5-589 Maximum Settlement - Diesel Generator Building Settlenent Station 1

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

Intake Pumping Station Settlement Station 4 (1975-1982)

(Please see Figures DVD for Actual Figure) ure 2.5-590 General Location Of Relative Movement Detectors TVA DWG NO. 10N203-3 R1 ure 2.5-591 Watts Bar Dam Probability Distribution: November - March Rainfall Period 1940 - 1983 ure 2.5-592 Yard ERCW Pipeline EST. 25-YR High Water Table ure 2.5-593 Water Table Profiles ure 2.5-594 Yard Underground Barrier Trench A STA 1 + 78 (Please See Figures DVD For Actual Figure) ure 2.5-595 Yard Underground Barrier Trench A STA 3 + 78 (Please See Figures DVD For Actual Figure) ure 2.5-596 Yard Underground Barrier Trench A STA 5 + 78 (Please See Figures DVD For Actual Figure)

List of Figures

tion Title ure 2.5-597 Yard Underground Barrier Trench A STA 7 + 78 (Please See Figures DVD For Actual Figure) ure 2.5-598 Summary of Earthfill Test Data - Density ure 2.5-599 Summary Of Earthfill Test Data -Moisture Content ure 2.5-600 Summary Of Earthfill Test Data -Density ure 2.5-601 Summary Of Earthfill Test Data -Moisture Content ure 2.5-602 Yard Underground Barrier Trench B STA 1 + 100 (Please See Figures DVD For Actual Figure) ure 2.5-603 Yard Underground Barrier Trench B STA 2 + 50 (Please See Figures DVD For Actual Figure) ure 2.5-604 Yard Underground Barrier Trench B STA 3 + 00 (Please See Figures DVD For Actual Figure) ure 2.5-605 Yard Underground Barrier Trench B STA 4 + 50 (Please See Figures DVD For Actual Figure) ure 2.5-606 Summary of Fill Test Data -Density ure 2.5-607 Summary of Earthfill Test Data - Moisture Content ure 2.5-608 Summary of Earthfill Test Data -Density ure 2.5-609 Summary of Earthfill Test Data - Moisture Content ure 2.5-610 Summary of Granular Fill Test Data - Relative Density of Figures 2-xli

tion Title List of Figures

SITE CHARACTERISTICS GEOGRAPHY AND DEMOGRAPHY

.1 Site Location and Description

.1.1 Specification of Location The 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:

LONGITUDE AND LATITUDE (degrees/minutes/seconds)

UNIT 1 35°36' 10.430" N 84°47' 24.267" W UNIT 2 35°36' 10.813" N 84°47' 21.398" W UNIVERSAL TRANSVERSE MERCATOR (Meters)

Northing Easting UNIT 1 N3, 941,954.27 E 700,189.94 UNIT 2 N3, 941,967.71 E 700,261.86

.1.2 Site Area Map Figure 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.

GRAPHY AND DEMOGRAPHY 2.1-1

.1.3 Boundaries for Establishing Effluent Limits The boundary on which limits for the release of radioactive effluents are based is the site boundary shown in Figure 2.1-4b.

.2 Exclusion Area Authority And Control Due 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 Authority All 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.

.2.2 Control of Activities Unrelated to Plant Operation There 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.

.2.3 Arrangements for Traffic Control Arrangements 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).

.2.4 Abandonment or Relocation of Roads No public roads cross the exclusion area.

.3 Population Distribution Historical and projected population information is contained in this section. Both resident and transient populations are included. In 1986, population within ten miles of the site was estimated using aerial photography to count the residences. The 1980 Census data on persons per dwelling were used to convert the house count into a population estimate. Population beyond ten miles and out to fifty miles was based on county level data from two sources: "1990 Census of Population", U.S. Bureau of the Census, and "County Projections to 2040" for Tennessee, Georgia, and North Carolina, Regional GEOGRAPHY AND DEMOGRAPHY

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.

Considerations 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. Some reduction is made for visitation by ten-mile residents. School enrollments are based largely on information from the school districts' planning staffs. TVA used enrollment/population ratios to develop projections not available from the districts.

.3.1 Population Within 10 Miles About 15,500 people lived within 10 miles of the Watts Bar site in 1990, with more than 80% of them between five and 10 miles from the site. Two small towns, Spring City and Decatur, which in 1990 had populations of 2,199 and 1,361 respectively, are located between five and 10 miles from the site. Decatur is south and south-west from the site, while Spring City is northwest and north-northwest. The remainder of the area is sparsely populated. Most of the population growth in the area is expected to be in or adjacent to Spring City and Decatur.

Tables 2.1-2 through 2.1-8b show the estimated and projected population distribution within ten miles of the site for 1970, 1978, 1980, 1986, 1990, 2000, 2010, 2020, 2030 and 2040. Figure 2.1-3 shows the area within ten miles of the site overlaid by circles and sixteen compass sectors.

.3.2 Population Between 10 and 50 Miles The 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 63%,

or 412,000 persons, between 1970 and 2040. About 70% 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 1990 of 152,466; 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 larger than Chattanooga. However, of its 1990 population of 165,121, approximately 5% located between 40 and 50 miles of the site with the remainder beyond 50.

There are three smaller urban concentrations in this area with population greater than 20,000. The city of Oak Ridge, which had a 1990 population of 27,310, is located about 40 miles to the northeast. The twin cities of Alcoa and Maryville, which had a combined population in 1990 of about 25,600, are located between 45 to 50 miles to GRAPHY AND DEMOGRAPHY 2.1-3

the east-northeast. Cleveland, with a 1990 population of 30,354, is located about 30 miles to the south. Most of the population growth is expected to occur around these and the larger population centers.

There are, in addition, a number of smaller communities dispersed throughout the area, surrounded by low-density rural areas.

Tables 2.1-9 through 2.1-15b contain the 1970, 1980, 1990, 2000, 2010, 2020, 2030, and 2040 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.

.3.3 Transient Population Transient population consists of visitors to recreation sites and students in schools.

There are no 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 2.1-1 through 2.1-1f. The visitation is based on the maximum capacity of facilities plus some overflow minus visitors from within the 10-mile area. Capacities are based on inventories done in 1986 and 1988.

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 1990, these schools served 3,823 students, distributed as shown in Table 2.1-1g. Three schools are projected to be closed. Two of the schools will be consolidated into one school some time after the year 2000. Students from the other closed school are expected to attend a school located beyond ten miles. The exact location of the new school is yet to be determined.

.3.4 Low Population Zone The 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 (1621 in 1990) and the population density (57 people per square mile in 1990) are both low. Population includes permanent residents (769) and transients (852) estimates for 1990.

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.

GEOGRAPHY AND DEMOGRAPHY

.3.5 Population Center The nearest population center (as defined by 10 CFR 100) is Cleveland, Tennessee, which had a 1990 population of 30,354. Cleveland is located approximately 30 miles south of the Watts Bar site.

.3.6 Population Density Cumulative population around the site out to 30 miles is plotted on Figures 2.1-20 and 2.1-21 for the initial (1994) and final (2034) years of operation. Also plotted on Figure 2.1-20 is the cumulative population that 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 at least an order of magnitude smaller than that based on the uniform population density.

REFERENCES None.

GRAPHY AND DEMOGRAPHY 2.1-5

Table 2.1-1 Watts Bar 1986 Peak Hours Recreation Visitation Within 10 Miles of the Site Mile(s) from Site Total 0-1 1-2 2-3 3-4 4-5 5-10 2,733 0 574 0 0 0 2,159 E 4,915 0 180 0 0 1,476 3,259 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 377 0 377 0 0 0 0 W 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 832 0 0 0 0 0 832 W 1,001 0 535 0 0 0 466 TAL 9,858 0 1,666 0 0 1,467 6,716 GEOGRAPHY AND DEMOGRAPHY

Table 2.1-1a Watts Bar 1990 Estimated Peak Hour Recreation Visitation Within 10 Miles Of The Site (Sheet 1 of 1)

Distance Mile(s) ection Total 0-1 1-2 2-3 3-4 4-5 5-10 535 0 535 0 0 0 0 4,546 0 0 0 0 573 3,973 3,309 0 0 0 0 812 2,497 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 W 463 0 317 0 0 0 146 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 0 0 0 0 0 0 0 W 1,389 0 0 0 0 0 1,389 TAL 10242 0 852 0 0 1,385 8,005 GRAPHY AND DEMOGRAPHY 2.1-7

Table 2.1-1b Watts Bar 2000 Estimated Peak Hour Recreation Visitation Within 10 Miles Of The Site (Sheet 1 of 1)

Distance Mile(s) ection Total 0-1 1-2 2-3 3-4 4-5 5-10 577 0 577 0 0 0 0 E 4,903 0 0 0 0 618 4,285 3,569 0 0 0 0 876 2,693 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 W 499 0 342 0 0 0 157 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 0 0 0 0 0 0 0 W 1,498 0 0 0 0 0 1,498 TAL 11,046 0 919 0 0 1,494 8,633 GEOGRAPHY AND DEMOGRAPHY

Table 2.1-1c Watts Bar 2010 Estimated Peak Hour Recreation Visitation Within 10 Miles Of The Site (Sheet 1 of 1)

Distance Mile(s) ection Total 0-1 1-2 2-3 3-4 4-5 5-10 609 0 609 0 0 0 0 E 5,171 0 0 0 0 652 4,519 3,764 0 0 0 0 924 2,840 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 W 527 0 361 0 0 0 166 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 0 0 0 0 0 0 0 W 1,580 0 0 0 0 0 1,580 TAL 11,651 0 970 0 0 1,576 9,105 GRAPHY AND DEMOGRAPHY 2.1-9

Table 2.1-1d Watts Bar 2020 Estimated Peak Hour Recreation Visitation Within 10 Miles Of The Site (Sheet 1 of 1)

Distance Mile(s) ection Total 0-1 1-2 2-3 3-4 4-5 5-10 635 0 635 0 0 0 0 E 5,393 0 0 0 0 680 4,713 3,926 0 0 0 0 964 2,962 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 W 550 0 377 0 0 0 173 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 0 0 0 0 0 0 0 W 1,648 0 0 0 0 0 1,648 TAL 12,152 0 1,012 0 0 1,644 9,496 0 GEOGRAPHY AND DEMOGRAPHY

Table 2.1-1e Watts Bar 2030 Estimated Peak Hour Recreation Visitation Within 10 Miles Of The Site (Sheet 1 of 1)

Distance Mile(s) ection Total 0-1 1-2 2-3 3-4 4-5 5-10 641 0 641 0 0 0 0 E 5,447 0 0 0 0 687 4,760 3,966 0 0 0 0 974 2,992 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 W 556 0 381 0 0 0 175 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 0 0 0 0 0 0 0 W 1,664 0 0 0 0 0 1,664 TAL 12,274 0 1,022 0 0 1,661 9,591 GRAPHY AND DEMOGRAPHY 2.1-11

Table 2.1-1f Watts Bar 2040 Estimated Peak Hour Recreation Visitation Within 10 Miles Of The Site (Sheet 1 of 1)

Distance Mile(s) ection Total 0-1 1-2 2-3 3-4 4-5 5-10 647 0 647 0 0 0 0 E 5,502 0 0 0 0 694 4,808 4,006 0 0 0 0 984 3,022 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 W 562 0 385 0 0 0 177 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 0 0 0 0 0 0 0 W 1,681 0 0 0 0 0 1,681 TAL 12,398 0 1,032 0 0 1,678 9,688 2 GEOGRAPHY AND DEMOGRAPHY

Table 2.1-1g School Enrollments In Area Of Watts Bar Nuclear Plant (Sheeet 1 of 1)

Enrollment hool Name Location 1990 2000 2010 2020 2030 2040 ENSVILLE ELEM. 8-9 W 169 191 220 253 260 265 EA COUNTY HS 8-9 W 1,316 1,564 1,610 1,657 1,670 1,675 RING CITY ELEM. 7-8 NNW 942 1,118 1,150 1,184 1,185 1,195 CATUR ELEM.1 5-6 S 355 360 380 400 400 400 IGS CONSOLD. 5-6 S 490 490 500 505 505 505 IRVIEW ELEM. 2-3 SE 177 150 CLOSE CLOSE CLOSE CLOSED D D D N MILE ELEM. 7-8 NE 186 150 CLOSE CLOSE CLOSE CLOSED D D D 2

W CONSOLD. --- --- 300 315 315 315 HOOL LEWILD ELEM. 9-10 SSE 188 CLOS CLOSE CLOSE CLOSE CLOSED ED D D D TOTAL 3,823 4,023 4,160 4,314 4,335 4,355 1 Previously named Meigs Consolidated Elementary 2 No site has been chosen for this school WBNP-33 ABLE 2.1-2 WATTS BAR 970 POPULATION DISTRIBUTION WITHIN 10 MILES OF THE SITE GRAPHY AND DEMOGRAPHY 2.1-13

TTS BAR Table 2.1-2 Watts Bar 1970 Population Distribution Within 10 Miles of The Site Mile(s) from Site Total 0-1 1-2 2-3 3-4 4-5 5-10 415 - - 5 - - 410 175 - - 30 10 20 115 730 - 5 85 80 30 530 490 - 10 25 55 65 335 415 - - 10 35 30 340 480 5 5 10 40 60 360 420 - - 15 30 30 345 500 - 5 10 30 15 440 1,260 - 40 25 15 80 1,100 440 5 15 5 40 20 355 395 5 5 5 15 - 365 985 10 15 55 35 25 845 530 5 10 10 30 35 440 315 5 30 20 60 60 140 1,750 - 15 40 75 110 1,510 1,435 - - - 60 60 1,355 10,735 35 115 350 610 600 8,985 WBNP-33

TTS BAR Table 2.1-3 Watts Bar 1978 Population Distribution Within 10 Miles of The Site Mile(s) from Site Total 0-1 1-2 2-3 3-4 4-5 5-10 465 - - 10 - - 455 190 - - 30 10 20 130 740 - 5 90 80 30 535 500 - 10 25 60 65 340 420 - - 10 35 30 345 545 5 5 10 45 75 405 530 - - 20 35 35 440 630 - 5 10 35 20 560 1,595 - 40 30 20 105 1,400 540 10 15 10 45 20 440 395 5 5 10 20 - 355 970 10 20 60 40 30 810 550 10 10 10 35 40 445 345 5 35 20 65 65 155 1,960 - 15 40 80 125 1,700 1,605 - - - 65 25 1,515 11,980 45 165 385 670 685 10,030 WBNP-33

TTS BAR Table 2.1-4 Watts Bar 1980 Population Distribution Within 10 Miles of The Site Mile(s) from Site Total 0-1 1-2 2-3 3-4 4-5 5-10 480 - - 10 - - 470 195 - - 30 10 20 135 745 - 5 90 80 30 540 500 - 10 25 60 65 340 420 - - 10 35 30 345 560 5 5 10 45 80 415 565 - - 20 40 40 465 675 - 5 10 40 25 595 1,690 - 40 35 20 110 1,485 565 10 15 10 45 20 465 395 5 5 10 20 - 355 960 10 20 60 40 30 800 555 10 10 10 35 40 450 360 5 35 20 70 70 160 2,020 - 15 40 85 130 1,750 1,650 - - - 70 25 1,555 WBNP-33 12,335 45 165 390 695 715 10,325

Table 2.1-4a Watts Bar 1986 Population Distribution Within 10 Miles of The Site (Sheet 1 of 1)

Distance From Site (Miles)

R 0-1 1-2 2-3 3-4 4-5 5-10 0-10 0 94 28 40 115 763 1,040 E 0 22 22 68 39 684 835 0 0 118 186 118 861 1,283 E 0 2 50 48 70 225 395 0 2 7 48 34 414 505 E 0 2 4 41 53 501 601 0 0 15 32 26 431 504 E 11 20 30 24 21 610 689 0 49 13 21 230 1225 1,538 W 0 31 7 16 29 663 746 0 0 5 2 0 447 454 SW 0 9 35 33 26 1094 1,197 2 5 16 51 56 717 847 NW 5 26 9 119 103 208 470 0 9 94 96 330 1,947 2,476 W 0 0 54 73 84 1,776 1,987 TAL 18 271 480 898 1,334 12,566 15,567 GRAPHY AND DEMOGRAPHY 2.1-17

Table 2.1-5 Watts Bar 1990 Population Distribution Within 10 Miles of The Site (Sheet 1 of 1)

Distance From Site (Miles)

R 0-1 1-2 2-3 3-4 4-5 5-10 0-10 0 94 28 40 115 763 1,040 E 0 22 22 68 39 684 835 0 0 118 187 118 764 1,187 E 0 2 50 48 70 226 396 0 2 7 48 34 414 505 E 0 2 4 41 53 501 601 0 0 15 32 26 431 504 E 11 20 3 24 21 611 690 0 49 13 21 231 1,230 1,544 W 0 31 7 16 29 666 749 0 0 5 2 0 447 454 SW 0 9 35 33 26 1094 1,197 2 5 16 51 56 717 847 NW 5 26 9 119 103 208 470 0 9 94 96 330 1,947 2,476 W 0 0 54 73 84 1,776 1,987 TAL 18 271 480 899 1,335 12,479 15,482 8 GEOGRAPHY AND DEMOGRAPHY

Table 2.1-6 Watts Bar 2000 Population Distribution Within 10 Miles of The Site (Sheet 1 of 1)

Distance From Site (Miles)

R 0-1 1-2 2-3 3-4 4-5 5-10 0-10 0 100 30 43 122 812 1,107 E 0 23 23 71 41 726 884 0 0 123 196 123 805 1,247 E 0 2 52 50 73 237 414 0 2 7 50 36 441 536 E 0 2 4 43 55 535 639 0 0 16 33 27 459 535 E 12 21 3 25 22 651 734 0 51 14 22 242 1,287 1,616 W 0 32 7 17 30 697 783 0 0 5 2 0 475 482 SW 0 10 37 35 28 1,164 1,274 2 5 17 54 60 762 900 NW 5 28 10 127 110 221 501 0 10 100 102 351 2,071 2,634 W 0 0 57 78 89 1,890 2,114 TAL 19 286 505 948 1,409 13,233 16,400 GRAPHY AND DEMOGRAPHY 2.1-19

Table 2.1-7 Watts Bar 2010 Population Distribution Within 10 Miles of The Site (Sheet 1 of 1)

Distance From Site (Miles)

R 0-1 1-2 2-3 3-4 4-5 5-10 0-10 0 105 31 45 128 850 1,159 E 0 24 24 73 42 758 921 0 0 126 201 126 858 1,281 E 0 2 53 51 75 243 424 0 2 7 51 36 459 555 E 0 2 4 45 56 559 666 0 0 16 34 28 479 557 E 12 22 3 26 23 678 764 0 52 14 23 248 1,319 1,656 W 0 33 7 18 31 714 803 0 0 5 2 0 495 502 SW 0 10 39 37 29 1,218 1,333 2 5 18 57 63 798 943 NW 5 29 10 107 367 2,167 2,756 0 10 105 107 367 2,167 2,756 W 0 0 60 82 93 1,978 2,213 TAL 19 296 522 985 1,460 13,774 17,056 0 GEOGRAPHY AND DEMOGRAPHY

Table 2.1-8 Watts Bar 2020 Population Distribution Within 10 Miles of The Site (Sheet 1 of 1)

Distance From Site (Miles)

R 0-1 1-2 2-3 3-4 4-5 5-10 0-10 0 109 32 47 133 881 1,202 E 0 25 25 76 43 786 955 0 0 130 208 130 861 1,329 E 0 2 55 53 78 252 440 0 2 7 53 38 476 576 E 0 2 4 47 58 581 692 0 0 16 35 29 497 577 E 12 23 3 27 24 704 793 0 54 14 24 257 1,366 1,715 W 0 34 7 19 32 739 831 0 0 5 2 0 513 520 SW 0 10 40 38 30 1,263 1,381 2 5 19 59 65 827 977 NW 5 30 10 138 119 240 542 0 10 109 111 381 2,247 2,858 W 0 0 62 85 96 2,051 2,294 TAL 19 306 538 1,022 1,513 14,284 17,682 GRAPHY AND DEMOGRAPHY 2.1-21

Table 2.1-8a Watts Bar 2030 Population Distribution Within 10 Miles of The Site (Sheet 1 of 1)

Distance From Site (Miles)

R 0-1 1-2 2-3 3-4 4-5 5-10 0-10 0 110 32 47 134 887 1,210 E 0 25 25 76 43 791 960 0 0 130 208 130 861 1,329 E 0 2 55 53 78 252 440 0 2 7 53 38 479 579 E 0 2 4 47 58 586 697 0 0 16 35 29 501 581 E 12 23 3 27 24 709 798 0 54 14 24 257 1,367 1,716 W 0 34 7 19 32 739 831 0 0 5 2 0 516 523 SW 0 10 40 38 30 1,272 1,390 2 5 19 59 65 832 982 NW 5 30 10 139 120 242 546 0 10 110 112 384 2,263 2,879 W 0 0 62 86 97 2,066 2,311 TAL 19 307 539 1,025 1,519 14,363 17,772 2 GEOGRAPHY AND DEMOGRAPHY

Table 2.1-8b Watts Bar 2040 Population Distribution Within 10 Miles of The Site (Sheet 1 of 1)

Distance From Site (Miles)

R 0-1 1-2 2-3 3-4 4-5 5-10 0-10 0 111 32 47 135 893 1,218 E 0 25 25 76 43 796 965 0 0 130 208 130 861 1,329 E 0 2 55 53 78 252 440 0 2 7 53 38 482 582 E 0 2 4 47 58 591 702 0 0 16 35 29 505 585 E 12 23 3 27 24 714 803 0 54 14 24 257 1,368 1,717 W 0 34 7 19 32 739 831 0 0 5 2 0 519 526 SW 0 10 40 38 30 1,281 1,399 2 5 19 59 65 837 987 NW 5 30 10 140 121 244 550 0 10 111 113 387 2,279 2,900 W 0 0 62 87 98 2,081 2,328 TAL 19 308 540 1,028 1,525 14,442 17,862 GRAPHY AND DEMOGRAPHY 2.1-23

Table 2.1-9 Watts Bar 1970 Population Distribution Within 50 Miles of The Site Mile(s) from Site Total 0-10 10-20 20-30 30-40 40-50 7,155 415 1,725 320 1,330 3,365 E 29,645 175 6,915 14,905 6,545 1,105 66,215 730 1,585 9,910 14,405 39,585 E 98,825 490 1,380 8,480 16,747 71,730 26,140 415 6,530 5,215 5,135 8,845 E 13,115 480 2,610 6,820 3,080 125 30,975 420 15,245 9,805 1,780 3,725 E 15,400 500 2,215 3,515 2,720 6,450 51,620 1,260 980 12,965 31,770 4,645 W 101,820 440 1,175 4,955 6,670 88,580 138,225 395 2,490 4,400 18,410 112,530 SW 19,260 985 7,655 955 4,610 5,055 6,830 530 595 3,600 1,050 1,055 NW 17,685 315 6005 2,275 2,455 12,035 12,600 1,750 495 1,560 3,600 5,195 W 19,155 1,435 620 10,015 3,260 3,825 TAL 654,665 10,735 52,820 99,695 123,565 367,850 4 GEOGRAPHY AND DEMOGRAPHY

Table 2.1-10 Watts Bar 1978 Population Distribution Within 50 Miles of The Site Mile(s) from Site Total 0-10 10-20 20-30 30-40 40-50 7,145 465 1,725 310 1,320 3,325 E 32,565 190 7,015 16,855 7,520 985 69,800 740 1,630 10,480 15,560 41,390 E 116,065 500 1,440 8,685 18,655 86,785 27,235 420 7,450 5,300 5,175 8,890 E 14,350 545 2,605 8,065 3,015 120 36,055 530 19,860 10,140 1,795 3,730 E 16,740 630 2,505 3,805 3,185 6,615 64,090 1,595 1,060 16,875 39,255 5,305 W 113,800 540 1,225 6,360 8,535 97,140 146,295 395 2,615 4,740 19,935 118,610 SW 22,215 970 9,525 955 5,515 5,250 7,215 550 570 3,855 1,155 1,085 NW 19,790 345 620 2,520 2,660 13,645 13,230 1,960 670 13,035 3,740 5,280 W 22,415 1,605 670 13,035 3,300 3,805 TAL 729,005 11,980 61,060 113,685 140,320 401,960 GRAPHY AND DEMOGRAPHY 2.1-25

Table 2.1-11 Watts Bar 1980 Population Distribution Within 50 Miles of The Site Mile(s) from Site Total 0-10 10-20 20-30 30-40 40-50 7,135 480 1,725 305 1,320 3,305 E 33,340 195 7,040 17,385 7,785 935 70,710 745 1,640 10,620 15,865 41,840 E 120,985 500 1,460 8,740 19,145 91,050 27,530 420 7,695 5,330 5,185 8,900 E 14,690 560 2,600 8,415 3,000 115 37,545 565 21,220 10,225 1,800 3,735 E 17,105 675 2,585 3,875 3,310 6,660 67,675 1,690 1,085 18,035 41,380 5,485 W 117,065 565 1,240 6,770 9,075 99,415 148,265 395 2,650 4,835 20,355 120,030 SW 23,035 960 10,060 955 5,765 5,295 7,325 555 565 3,920 1,185 1,100 NW 20,375 360 635 2,585 2,715 14,080 13,400 2,020 560 1,745 3,780 5,295 W 23,365 1,650 685 13,920 3,310 3,800 TAL 749,455 12,335 63,445 117,660 144,975 411,040 6 GEOGRAPHY AND DEMOGRAPHY

Table 2.1-11a Watts Bar 1986 Population Distribution Within 50 Miles of The Site Distance From Site (Miles)

R 0-10 10-20 20-30 30-40 40-50 Total 1,040 1,769 1,130 2,155 3,802 9,896 E 835 7,872 20,408 7,414 1,195 37,724 1,283 2,946 11,359 19,903 46,528 82,019 E 395 1,965 11,673 28,583 108,493 151,109 505 8,367 8,093 8,502 10,887 36,354 E 604 4,896 8,782 2,821 316 17,416 504 16,165 11,159 2,850 3,752 34,430 E 689 1,719 5,531 3,001 6,288 17,228 1,538 1,486 22,826 36,802 7,734 70,386 W 746 1,675 10,960 29,038 96,042 138,461 454 3,001 6,223 46,955 95,932 152,565 SW 1,197 10,670 2,170 5,474 7321 26,832 847 973 3,540 2,399 1,709 9,468 NW 470 1,947 2,114 3,284 13,860 21,675 2,476 646 4,421 4,777 7,775 20,095 W 1,987 840 14,863 4,232 4,131 26,053 TAL 15,567 66,937 145,252 208,190 415,765 851,712 GRAPHY AND DEMOGRAPHY 2.1-27

Table 2.1-12 Watts Bar 1990 Population Distribution Within 50 Miles of The Site (Sheet 1 of 1)

Distance From Site (Miles)

R 0-10 10-20 20-30 30-40 40-50 Total 1,040 1,659 1,760 2,917 3,541 10,917 E 835 6,947 15,473 8,288 1,074 32,616 1,187 3,194 15,815 24,769 43,336 88,300 E 396 1,767 8,371 32,151 108,745 151,430 505 7,781 7,276 8,777 13,967 38,305 E 601 3,470 9,788 2,793 300 16,952 504 16,530 9,068 3,285 3,142 32,529 E 690 3,052 6,825 3,348 5,536 19,450 1,544 1,115 26,801 31,540 9,044 70,044 W 749 4,827 13,711 20,327 93,289 132,902 454 5,541 7,499 54,539 99,669 167,702 SW 1,197 8,830 1,728 5,916 5,421 23,093 847 831 4,402 2,481 1,736 10,296 NW 470 1,205 2,384 3,114 14,876 22,048 2,476 277 5,825 5,626 7,975 22,178 W 1,987 737 14,619 3,826 2,532 23,702 TAL 15,482 67,763 151,343 213,695 414,182 862,465 8 GEOGRAPHY AND DEMOGRAPHY

Table 2.1-13 Watts Bar 2000 Population Distribution Within 50 Miles of The Site (Sheet 1 of 1)

R 0-10 10-20 20-30 30-40 40-50 Total 1,107 1,807 1,908 3,112 3,723 11,657 E 884 7,551 16,836 8,671 1,117 35,058 1,247 2,970 17,041 26,873 47,179 95,310 E 414 2,186 8,744 34,361 118,713 164,419 536 8,589 7,835 9,442 15,203 41,605 E 639 4,066 10,621 3,020 300 18,646 535 16,066 9,724 3,537 3,381 33,242 E 734 3,620 7,289 3,557 5,866 21,066 1,616 1,004 29,684 34,923 10,069 77,296 W 783 5,146 15,097 22,305 102,188 145,518 482 5,898 8,182 59,551 108,848 182,961 SW 1,274 9,406 1,860 6,401 5,862 24,803 900 879 4,739 2,619 1,852 10,988 NW 501 1,298 2,580 3,243 15,839 23,461 2,634 290 6,352 6,127 8,634 24,037 W 2,114 787 15,955 4,176 2,697 25,729 TAL 16,400 71,560 164,446 231,919 451,470 935,795 GRAPHY AND DEMOGRAPHY 2.1-29

Table 2.1-14 Watts Bar 2010 Population Distribution Within 50 Miles of The Site (Sheet 1 of 1) 0-10 10-20 20-30 30-40 40-50 Total 1,159 1,916 2,016 3,257 3,860 12,207 E 921 7,999 17,848 8,958 1,150 36,875 1,281 3,146 17,972 28,473 50,125 100,998 E 424 2,297 9,063 36,089 126,156 174,030 555 9,088 8,278 9,956 16,126 44,004 E 666 4,264 11,272 3,198 300 19,700 557 16,845 10,205 3,727 3,555 34,889 E 764 3,795 7,624 3,704 6,092 21,979 1,656 1,064 31,889 37,512 10,817 82,938 W 803 5,364 16,150 23,815 108,973 155,105 502 6,167 8,702 63,362 115,837 194,570 W 1,333 9,851 1,965 6,735 6,185 26,068 943 919 5,015 2,722 1,935 11,534 W 523 1,370 2,731 3,337 16,648 24,609 2,756 301 6,734 6,499 9,155 25,445 W 2,213 823 16,927 4,430 2,824 27,217 TAL 17,056 75,209 174,390 245,775 479,738 992,167 0 GEOGRAPHY AND DEMOGRAPHY

Table 2.1-15 Watts Bar 2020 Population Distribution Within 50 Miles of The Site (Sheet 1 of 1) 0-10 10-20 20-30 30-40 40-50 Total 1,202 2,010 2,107 3,384 3,994 12,697 E 955 8,360 18,664 9,246 1,179 38,404 1,329 3,289 18,737 29,772 52,488 105,615 E 440 2,390 9,348 37,529 132,153 181,860 576 9,493 8,638 10,383 16,887 45,977 E 692 4,432 11,793 3,340 300 20,557 577 17,517 10,619 3,891 3,698 36,301 E 793 3,946 7,928 3,850 6,287 22,804 1,715 1,112 33,605 39,531 11,289 87,252 W 831 5,579 16,988 25,015 114,269 162,682 520 6,400 9,121 66,432 121,450 203,923 W 1,381 10,220 2,040 6,998 6,437 27,076 977 945 5,199 2,829 2,014 11,964 W 542 1,423 2,847 3,469 17,286 25,566 2,858 309 7,050 6,802 9,555 26,573 W 2,294 853 17,729 4,640 2,935 28,451 TAL 17,682 78,279 182,412 257,111 502,218 1,037,702 GRAPHY AND DEMOGRAPHY 2.1-31

Table 2.1-15a Watts Bar 2030 Population Distribution Within 50 Miles of The Site (Sheet 1 of 1) 0-10 10-20 20-30 30-40 40-50 Total 1,210 2,036 2,136 3,419 4,017 12,818 E 960 8,475 18,924 9,294 1,186 38,839 1,329 3,335 18,971 30,194 53,293 107,122 E 440 2,418 9,422 37,990 134,257 184,526 579 9,604 8,736 10,516 17,144 46,579 E 697 4,473 11,938 3,380 300 20,788 581 17,676 10,718 3,930 3,727 36,631 E 798 3,982 7,992 3,875 6,324 22,971 1,716 1,127 34,148 40,167 11,405 88,563 W 831 5,616 17,254 25,418 116,054 165,173 523 6,445 9,265 67,491 123,378 207,102 W 1,390 10,294 2,066 7,066 6,504 27,319 982 955 5,267 2,834 2,024 12,062 W 546 1,442 2,886 3,455 17,441 25,769 2,879 311 7,157 6,902 9,677 26,926 W 2,311 864 18,002 4,711 2,959 28,846 TAL 17,772 79,050 184,880 260,641 509,692 1,052,035 2 GEOGRAPHY AND DEMOGRAPHY

Table 2.1-15b Watts Bar 2040 Population Distribution Within 50 Miles of The Site (Sheet 1 of 1) 0-10 10-20 20-30 30-40 40-50 Total 1,210 2,071 2,166 3,453 4,040 12,940 E 965 8,591 19,187 9,342 1,194 39,279 1,329 3,381 19,210 30,623 54,111 108,655 E 440 2,445 9,497 38,457 136,395 187,234 582 9,716 8,837 10,649 17,404 47,189 E 702 4,514 12,085 3,420 300 21,022 585 17,835 10,818 3,969 3,756 36,964 E 803 4,018 8,056 3,899 6,362 23,138 1,717 1,141 34,699 40,812 11,522 89,892 W 831 5,653 17,523 25,829 117,868 167,704 526 6,490 9,411 68,565 125,338 210,330 W 1,399 10,369 2,091 7,134 6,571 27,564 987 965 5,337 2,839 2,035 12,163 W 550 1,461 2,925 3,440 17,598 25,973 2,900 314 7,266 7,004 9,802 27,286 W 2,328 874 18,279 4,784 2,983 29,248 TAL 17,854 79,840 187,386 264,220 517,279 1,066,580 GRAPHY AND DEMOGRAPHY 2.1-33

Table 2.1-16 Deleted by Amendment 83 4 GEOGRAPHY AND DEMOGRAPHY

Table 2.1-17 Deleted by Amendment 83 GRAPHY AND DEMOGRAPHY 2.1-35

THIS PAGE INTENTIONALLY BLANK 6 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR GEOGRAPHY AND DEMOGRAPHY WBNP-83 Figure 2.1-1 Location of Watts Bar Nuclear Plant Site 2.1-37

WATTS BAR 2.1-38 GEOGRAPHY AND DEMOGRAPHY WBNP-50 Figure 2.1-2 Watts Bar Site Location 0-50 Miles

WATTS BAR GEOGRAPHY AND DEMOGRAPHY WBNP-50 Figure 2.1-3 Watts Bar Site Location 0-10 Miles 2.1-39

WATTS BAR 2.1-40 GEOGRAPHY AND DEMOGRAPHY WBNP-72 Figure 2.1-4a Watts Bar Topographic Map & Reservation Boundary

WATTS BAR GEOGRAPHY AND DEMOGRAPHY Figure 2.1-4b Site Boundary / Exclusion Area Boundary WBNP-72 2.1-41

WATTS BAR WBNP-72 Figure 2.1-5 Main Plant General Plan 2.1-42 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-63 Figure 2.1-6 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY 2.1-43

WATTS BAR WBNP-63 Figure 2.1-7 Deleted by Amendment 63 2.1-44 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-63 Figure 2.1-8 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY 2.1-45

WATTS BAR WBNP-63 Figure 2.1-9 Deleted by Amendment 63 2.1-46 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-63 Figure 2.1-10 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY 2.1-47

WATTS BAR WBNP-63 Figure 2.1-11 Deleted by Amendment 63 2.1-48 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-63 Figure 2.1-12 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY 2.1-49

WATTS BAR WBNP-63 Figure 2.1-13 Deleted by Amendment 63 2.1-50 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-63 Figure 2.1-14 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY 2.1-51

WATTS BAR WBNP-63 Figure 2.1-15 Deleted by Amendment 63 2.1-52 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-63 Figure 2.1-16 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY 2.1-53

WATTS BAR WBNP-63 Figure 2.1-17 Deleted by Amendment 63 2.1-54 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-63 Figure 2.1-18 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY 2.1-55

WATTS BAR WBNP-63 Figure 2.1-19 Deleted by Amendment 63 2.1-56 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-83 Figure 2.1-20 1994 Cumulative Population Within 30 Miles Of The Site GEOGRAPHY AND DEMOGRAPHY 2.1-57

WATTS BAR WBNP-83 Figure 2.1-21 2034 Cumulative Population Within 30 Miles of the Site 2.1-58 GEOGRAPHY AND DEMOGRAPHY

NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES

.1 Location and Route Maps 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.

No other significant industrial land use, military facilities, or transportation routes are in the vicinity of the nuclear plant.

.2 Descriptions

.2.1 Description of Facilities The 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 Description of Products and Materials Table 2.2-1 shows the total amount of certain hazardous materials shipped past the Watts Bar Nuclear Plant from 1980 to 1990 on a yearly basis. The product listed as gasoline on the table is actually RU250. More detailed information on the size and frequency of shipments is found in Table 2.2-2. It is based on informal surveys of dock operators during 1993. Total traffic past the site was 1,294,959 tons in 1990 compared to 760,000 tons in 1975.

Traffic on the TVA railroad spur currently consists 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.

.2.3 Pipelines No pipelines carrying petroleum products are located in the vicinity of the nuclear plant.

.2.4 Waterways The 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 RBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES 2.2-1

1500 to 1800 horsepower for this section of the Tennessee River (Chattanooga to Knoxville). 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.

.2.5 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 130,000 to 150,000 for Lovell Field and about 4,000 at Mark Anton of which 2,000 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 2,200 flights per year based on 1992 data.

.2.6 Projections of Industrial Growth Within 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.

.3 Evaluation of Potential Accidents None 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 rail and 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.

NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES

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.

The 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.

3.1 REFERENCES

None.

RBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES 2.2-3

TTS BAR (U.S. Army Corps of Engineers) 1980 - 1990 (Sheet 1 of 1) odities 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 s ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----

e & ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----

nous 8537 5479 2982 20260 11014 41958 19867 12134 11636 7591 89882 r

e ---- ---- ---- ---- ---- ---- 32871 ---- ---- ---- ----

ne ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----

e ---- ---- ---- 3325 ---- ---- ---- ---- ---- ---- ----

l al 47442 15359 14223 ---- 31008 43469 21849 ---- 25487 13375 162053 l

hemicals 46902 36881 20295 ---- 11404 4778 2906 2588 3132 ---- ----

102881 57719 37500 23585 53426 90205 44622 14722 40255 20699 25193 l product is RU250.

l product classification for 1990 is Urea Fertilizers.

l product classification for 1990 is Fuel Oils NEC.

WBNP-83

Table 2.2-2 Waterborne Hazardous Material Traffic Survey Results 1992 (Sheet 1 of 1) duct Amount Frequency sidual Fuel Oil 3 - 1,500 ton barges 3 months a 10 - 1,500 ton barges 6 months ash 1 - 1,500 ton barge monthly osphate 1 - 1,500 ton barge monthly phate Potash 1 - 1,500 ton barge 4 months RBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES 2.2-5

THIS PAGE INTENTIONALLY BLANK NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES

Security Information Withheld under 10CFR 2.390(d)(1)

WATTS BAR WBNP-63

[s5]

SECURITY SENSITIVE Figure 2.2-1 Airways in the Area of the Plant

[e5]

NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES 2.2-7

Security Information Withheld under 10CFR 2.390(d)(1)

WATTS BAR WBNP-63

[s5]

SECURITY SENSITIVE Figure 2.2-2 Military Airways in the Area of the Plant

[e5]

NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES 2.2-8

METEOROLOGY

.1 Regional Climate

.1.1 Data Sources Most 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.

.1.2 General Climate The 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 EOROLOGY 2.3-1

largest 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.

.1.3 Severe Weather Severe 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 73 years, 1916-1988, 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:

zt (1)

P = -----

A 1

R = ---- (2)

P P = mean probability of a tornado striking a point in any year in a one-degree square.

Z = mean path area of a tornado (mi2) 6 t = mean number of tornadoes per year.

A = area of one-degree latitude, one-degree longitude square (mi2), which is 3887 mi2 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.

METEOROLOGY

For the baseline approach used by the Nuclear Regulatory Commission, Thom's Z =

2.8209 mi2 and a t = 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 mi2 (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 48 years (1941-1988) at the Chattanooga airport NWS station was 82 mph in March 1947.[11]The fastest mile of wind recorded at the Knoxville airport NWS station during a 46-year period (1943-1988) was 73 mph in July 1961.

[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 km2 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 the 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 EOROLOGY 2.3-3

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 (1879-1988) and Knoxville (1885-1988) show maximum 24-hour and single storm amounts of 12.0 and 18.2 inches, and 14.5 and 22.5 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 Reservoir 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.

METEOROLOGY

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:

(1) 300 mph = Rotational Speed (2) 60 mph = Translational Speed (3) 360 mph = Maximum Wind Speed (4) 3 psi = Pressure Drop (5) 1 psi/sec = Rate of Pressure Drop (3 psi/3 sec is assumed)

For the additional Diesel Generator Building and structures initiated after July 1979, the design basis tornado parameters are as follows:

(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)

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 Local Meteorology

.2.1 Data Sources Short-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, Decatur, 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.

EOROLOGY 2.3-5

.2.2 Normal and Extreme Values of Meteorological Parameters Temperature data for Decatur[13] and for Chattanooga[11] are presented in Tables 2.3-2 and 2.3-3, respectively. The Decatur data are somewhat dated (1896-1930);

however, the proximity of Decatur (about 6-1/2 miles south of the site) makes it a very representative location. The Chattanooga data are provided as reasonably representative and more recent (1940-1988) temperature information. Mean temperatures have ranged from the low 40s in the winter to the upper 70s 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 30°F for both locations to about 65°F for Decatur and 68°F for Chattanooga. The extreme maxima recorded for the respective data periods were 108°F at Decatur and 106°F at Chattanooga, while the extreme minima recorded were -20°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 Decatur[13,24] and in Table 2.3-6 for Chattanooga[11] and Knoxville.[12] The period of record for Decatur is not recent, but the location is very representative of the Watts Bar site. The Chattanooga and Knoxville records provide more current information and offer a more complete picture of the pattern of snowfall in the Tennessee River Valley from Chattanooga to Knoxville. Mean annual snowfall has ranged from about four inches at Chattanooga to about 13 inches at Knoxville.

Decatur, about halfway between those locations, averaged about nine 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 12, 13, and 18 inches at Chattanooga, Decatur, 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 METEOROLOGY

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.

Wind 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 up valley-down valley 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.

EOROLOGY 2.3-7

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 period, 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 Potential Influence of the Plant and Its Facilities on Local Meteorology The 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 METEOROLOGY

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 natural 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.

.2.4 Local Meteorological Conditions for Design and Operating Bases All design basis meteorological parameters are discussed or referenced in Section 2.3.1.3.

.3 Onsite Meteorological Measurements Program

.3.1 Preoperational Program Onsite 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 Facility The 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 EOROLOGY 2.3-9

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 parameters 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]

Height Sensor (Meters) Description Wind Direction 10, 46, and 91 Ultrasonic wind sensor.

and Wind Speed Temperature 10, 46, and 91 Platinum wire resistance temperature detector (RTD) with aspirated radiation shield.

Dewpoint 10 Chilled-mirror dewpoint system.

Rainfall 1 Tipping bucket rain gage.

Data Acquisition System The 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 0 METEOROLOGY

the Central Emergency Control Center (CECC) and to a Remote Access Computer that enables callup for data validation and archiving.

System Accuracies The meteorological data collection system is designed and replacement components are chosen to meet or exceed specifications for accuracy identified in RG 1.23The 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.

The table below lists, by parameter, the RG 1.23 specification. The system RSS error will be less than or equal to that shown for each parameter. The meteorological data collection system satisfies the RG 1.23 accuracy requirements. A detailed listing of error sources for each parameter is included in the EDS manual[37]. TVA analysis of the system accuracies has been performed[38].

RG 1.23 Parameter Units Specification Wind Speed miles/hour + 0.50 Wind Direction degrees + 5.0 Air Temperature °F + 0.90 Vertical Temperature °F + 0.18 Difference Dewpoint Temperature °F + 0.90 Rainfall inches not specified Solar Radiation Langley/minute not specified Data Recording and Display The 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.

EOROLOGY 2.3-11

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 Calibration The 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 basis of the operational history of the component type. Detailed procedures are used and are referenced in the EDS Manual.

.3.2 Operational Meteorological Program The 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.

2 METEOROLOGY

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.

.3.3 Onsite Data Summaries of Parameters for Dispersion Meteorology Annual 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-downvalley wind direction patterns. However, for classes E-G, the flow patterns become progressively more diffuse, 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 EOROLOGY 2.3-13

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.

.4 Short-Term (Accident) Diffusion Estimates

.4.1 Objective Revised 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.

Nomenclature for RG 1.145 Method X/Q = centerline ground-level relative concentration (sec/m3) 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)y800m + 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).

U 10 = 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 (m2).

4 METEOROLOGY

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:

1 X Q = -----------------------------------------------

- (1)

U 10 ( y z + A 2 )

1 X Q = ---------------------------------- (2)

U 10 ( 3 y z )

1 X Q = ------------------------- - (3)

U 10 y z 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 m2. 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 X/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 EOROLOGY 2.3-15

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:

N NNE NE ENE E ESE SE SSE 1.36 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 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.

6 METEOROLOGY

.4.2 Calculation Results The 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/m3 and 5.323 x 10-4 sec/m3, respectively.

The maximum 0.5th and 5th percentile X/Q values from the 20-year data sets (6.070 x 10-4 sec/m3 and 5.263 x 10-4 sec m3, 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 2.3-64a (1974-1993).The maximum sector set corresponds to the southeast plume sector. The respective values are:

Period 1974-1988 1974-1993

-5 8-hour 6.765 x 10 6.677 x 10-5 16-hour 4.629 x 10-5 4.592 x 10-5 3-day 2.032 x 10-5 2.039 x 10-5 26-day 6.230 x 10-6 6.353 x 10-6 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 EOROLOGY 2.3-17

information based on the 20-year data set for 1974-1993. The original FSAR values are presented with the updated bases for comparison.

.5 Long-Term (Routine) Diffusion Estimates The X/Qs and D/Qs and the respective calculation methodologies are presented in the Offsite Dose Calculation Manual for Watts Bar Nuclear Plant.

The 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.

8 METEOROLOGY

REFERENCES (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, NOAA, NWS, Kansas City, Missouri, November 1987.

(11) U.S. Department of Commerce. Local Climatological Data, Annual Summary with Comparative Data, 1974, 1979, and 1988, Chattanooga, Tennessee, NOAA, National Climatic Data Center, Asheville, North Carolina.

(12) U.S. Department of Commerce. Local Climatological Data, Annual Summary with Comparative Data, 1974 and 1988, Knoxville, Tennessee, NOAA, National Climatic Data Center, Asheville, North Carolina.

EOROLOGY 2.3-19

(13) U.S. Department of Commerce. "Climatic Summary of the United States -

Eastern Tennessee," Climatography of the United States No. 10-77, U.S.

Weather Bureau, Revised 1957.

(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) Cooperative Observer Meteorological Records, Form 1009, Decatur, Tennessee, 1896-1940, obtained from National Climatic Data Center, Asheville, North Carolina, on November 24, 1970.

0 METEOROLOGY

(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, 1974, Oak Ridge, Tennessee, NOAA, National Climatic Data Center, Asheville, North Carolina.

(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) Huff, Stanley R. and Walter W. Griffin. "Nuclear Plant Meteorological Data Collection System Error Analysis," Tennessee Valley Authority, Report No.

DSB-IPS-8801, June 30, 1988.

EOROLOGY 2.3-21

(39) Tennessee Valley Authority. "Quality Assurance Program for Meteorological Monitoring for Nuclear Plants," RBO-WRES-ASD-QAP-2.

(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.

(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 METEOROLOGY

Table 2.3-1 Thunderstorm Day Frequencies Chattanooga1 Knoxville2 cember 1 1 nuary 1 1 bruary 2 1 Winter 4 3 rch 4 3 ril 5 5 y 7 7 Spring 16 15 ne 10 8 y 12 10 gust 9 7 Summer 31 25 ptember 4 3 tober 1 1 vember 1 1 Fall 6 5 Annual 56 48 1 U.S. Department of Commerce. Local Climatological Data, Annual Summary with Comparative Data, 1974, Chattanooga, Tennessee, NOAA, NCDC, Asheville, North Carolina. Period of record, 1931-1974.

2 U.S. Department of Commerce. Local Climatological Data, Annual Summary with Comparative Data, 1974, Knoxville, Tennessee, NOAA, NCDC, Asheville, North Carolina. Period of record, 1943-1974.

EOROLOGY 2.3-23

Table 2.3-2 Temperature Data (°F)

Decatur, Tennesee*

Daily Daily Daily Average Average Extreme Extreme nth Average Maximum Minimum Maximum Minimum uary 40.0 50.6 29.4 76 -9 ruary 41.6 53.0 30.3 78 -20 rch 50.5 63.0 38.1 91 2 il 58.5 72.0 45.0 94 20 y 67.1 80.8 53.5 99 30 e 74.6 87.2 62.0 103 40 y 77.6 89.8 65.3 108 48 ust 76.9 89.3 64.5 107 49 tember 71.9 85.1 58.7 106 34 ober 60.0 74.1 45.9 96 19 vember 48.4 61.3 35.5 82 7 cember 40.3 50.8 29.9 76 -4 ual 59.0 71.4 46.5 108 -20

  • U. S. Weather Bureau Cooperative Observer Station, Decatur, Tennessee; period of record, 35 years (1896-1930). From Climatography of the United States No. 10-77, "Climatic Summary of the United States - Eastern Tennessee," U. S. Department of Commerce, Weather Bureau, revised 1957.

4 METEOROLOGY

Table 2.3-3 Temperature Data (°F)

Chattanooga, Tennessee*

Daily Daily Daily Average Average Extreme Extreme nth Averagea Maximuma Minimuma Maximumb Minimumb uary 40.2 49.9 30.5 78 -10d ruary 42.9 53.4 32.3 79 1 rch 49.8 61.2 38.4 87 8 il 60.5 72.9 48.1 93 26 y 68.5 81.0 56.0 99 34 e 76.0 87.5 64.5 104 41 y 78.8 89.5 68.1 106c 51 ust 78.0 89.0 67.0 105 50 tember 71.9 83.4 60.4 102 36 ober 60.8 73.5 48.1 94 22 vember 48.9 60.7 37.1 84 4 cember 41.2 50.9 31.4 78 -2 ual 59.8 71.1 48.5 106c -10d

  • 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 1941-1970 period.
b. Period of record, 1940-1988.
c. 1952.
d. 1966 and 1985.

EOROLOGY 2.3-25

Table 2.3-4 Watts Bar Dam Precipitation Data (Inches)*

(1940-1975) (9/39-9/89 Extremes Recorded)

Average No. (1941-of Days 0.01 1970) Extreme Extreme 24-hour nth Inch or More Average Maximum Minimum Maximum uary 11 5.30 11.67 0.93 5.31 a ruary 10 5.34 9.79 0.74 3.50 rch 11 5.62 11.75 1.32 5.00 il 10 4.56 8.66 0.80 3.10 y 9 3.57 10.94 0.56 3.20 e 9 3.81 12.30 0.03 3.73 y l0 5.14 12.50 0.50 4.80 ust 9 3.20 7.13 0.52 3.19 tember 7 3.69 14.78 b 0.45 4.50 ober 6 2.90 7.91 0.00 3.05 vember 8 4.13 14.06 0.94 4.63 cember 10 5.31 12.08 0.30 4.15 ual 110 52.57

  • TVA raingage station 421, located on roof of Control Building at Watts Bar Dam.
a. January 1946.
b. September 1957.

6 METEOROLOGY

Table 2.3-5 Snowfall Data (Inches)

Decatur, Tennessee nth Monthly Maximum Maximum in Average* Monthly** 24 Hrs. **

nuary 2.4 14.5 8.0 bruary 2.4 18.5 13.0 rch 1.3 12.0 8.0 ril Trace Trace Trace y 0 0 0 ne 0 0 0 y 0 0 0 gust 0 0 0 ptember 0 0 Trace tober Trace Trace Trace vember 0.6 8.0 6.0 cember 2.0 15.0 7.0 nual 8.7

  • Climatography of the United States No. 10-77, "Climatic Summary of the United States - Eastern Tennessee," U. S. Department of Commerce, Weather Bureau, revised 1957. Data period for Decatur, 1896-1930.
    • Cooperative Observer Meteorological Records, Form 1009, Decatur, Tennessee, 1896-1940, obtained from National Climatic Center, Asheville, North Carolina, on November 24, 1970.

EOROLOGY 2.3-27

Table 2.3-6 Snowfall Data (Inches)

Chattanooga and Knoxville, Tennesseea,b Monthly Averagec Maximum Monthlyd Maximum in 24 Hrs.d nth Chat. Knox. Chat. Knox. Chat. Knox.

nuary 1.8 3.9 10.2* 15.1 10.2 12.0 bruary 1.1 3.6 10.4 23.3f 8.7 17.5 rch 0.5 2.0 10.1 20.2 6.0 12.1 ril Trace 0.2 2.8 10.7 2.8 10.7 y Trace Trace Trace Trace Trace Trace ne 0 0 0 0 0 0 y 0 0 0 0 0 0 gust 0 0 0 0 0 0 ptember 0 0 0 0 0 0 tober Trace Trace Trace Trace Trace Trace vember 0.1 1.0 2.8 18.2 2.8 18.2 cember 0.8 2.1 9.1 12.2 8.9g 8.9 nual 4.3 12.8 10.4* 23.3f 10.2g 18.2h a.Local Climatological Data, Annual Summary with Comparative Data, 1974 and 1988, Chattanooga, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, N.C.

b.Local Climatological Data, Annual Summary with Comparative Data, 1974 and 1988, Knoxville, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, N.C.

c.Period of record, July 1935-December 1974.

d.Chattanooga record, 1931-1988; Knoxville record, 1942-1988 e.Maximum in locality was 15.8 inches, January 1893.

f.Maximum in locality was 25.7 inches, February 1895.

g.Maximum in locality was 12.0 inches, December 1886.

h.November 21-22, 1952.

8 METEOROLOGY

Table 2.3-7 Average Relative Humidity Data (Percent) - Selected Hours Chattanooga, Tennessee*

(Eastern Standard Time) nth Hour Hour Hour Hour a b b 0100 0700 1300 1900b nuary 80 82 63 68 bruary 78 80 57 60 rch 77 81 53 56 ril 78 81 49 52 y 86 85 51 56 ne 88 85 54 60 y 89 89 57 64 gust 90 91 57 66 ptember 89 90 55 66 tober 88 89 52 67 vember 82 84 55 65 cember 82 83 62 70 nual 84 85 55 63

  • Local Climatological Data, Annual Summary with Comparative Data, 1974, Chattanooga, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, N.C.
a. Period of record, 1941-1974.
b. Period of record, 1931-1974.

EOROLOGY 2.3-29

Table 2.3-8 Relative Humidity (Percent)

National Weather Service Station Chattanooga, Tennessee*

January 1965-December 1971 nth Average Avg. Max. Avg. Min. Extreme Max. Extreme Min.

cember 75.3 83.6 67.7 100.0 10.7 uary 72.3 74.6 69.5 100.0 18.6 ruary 67.0 76.8 58.0 100.0 12.1 inter 71.5 78.3 65.1 100.0 10.7 rch 64.1 71.4 55.0 100.0 13.8 il 64.6 72.3 56.9 100.0 12.8 y 71.1 77.1 65.0 100.0 19.0 ring 66.6 73.6 58.9 100.0 12.8 e 72.3 77.4 68.3 100.0 23.1 y 75.5 80.1 71.2 100.0 26.9 ust 78.4 82.9 75.3 100.0 32.5 mmer 75.4 80.1 71.6 100.0 23.1 ptember 79.7 84.0 75.2 100.0 26.0 ober 76.6 83.0 71.1 100.0 18.2 vember 72.6 79.7 66.2 100.0 16.1 all 76.3 82.2 70.8 100.0 16.1 nnual 72.5 78.6 66.6 100.0 10.7

  • Analysis based on data tapes obtained from National Climatic Data Center, Asheville, North Carolina. Observations recorded on tape are for 3-hourly synoptic times.

0 METEOROLOGY

Table 2.3-9 Absolute Humidity (gm/m3)

National Weather Service Station Chattanooga, Tennessee*

January 1965-December 1971 nth Average Avg. Max. Avg. Min. Extreme Max. Extreme Min.

cember 5.8 7.2 4.5 16.1 0.9 uary 4.8 5.3 4.5 14.0 0.4 ruary 4.5 5.8 3.4 14.1 0.8 inter 5.0 6.1 4.1 16.1 0.4 rch 5.9 7.2 4.6 16.6 1.1 il 8.6 10.3 7.0 20.1 2.4 y 11.4 12.8 9.9 19.6 3.4 ring 8.6 10.1 7.1 20.1 1.1 e 14.7 15.9 13.5 22.7 4.9 y 16.7 17.7 15.6 24.2 8.6 ust 17.0 18.2 16.0 25.8 9.6 mmer 16.1 17.3 15.0 25.8 4.9 tember 14.8 16.2 13.6 23.6 4.2 ober 10.0 11.6 8.5 20.8 3.0 vember 6.5 7.9 5.1 17.8 1.2 all 10.4 11.9 9.1 23.6 1.2 nnual 10.0 11.4 8.8 25.8 0.4

  • Analysis based on data tapes obtained from National Climatic Data Center, Asheville, North Carolina. Observations recorded on tape are for 3-hourly synoptic times.

EOROLOGY 2.3-31

Table 2.3-10 Relative Humidity (Percent)

Watts Bar Nuclear Plant Meteorological Facility*

July 1, 1973 - June 30, 1975 nth Average Avg. Max. Avg. Min. Extreme Max. Extreme Min.

cember 71.2 85.1 53.8 100.0 30.2 uary 73.6 87.5 54.5 100.0 10.4 ruary 70.3 87.5 50.9 100.0 21.4 inter 71.7 86.7 53.1 100.0 10.4 rch 69.9 88.4 49.8 100.0 22.6 il 64.5 87.8 38.6 100.0 11.2 y 78.3 94.1 56.9 100.0 28.3 ring 70.9 90.1 48.5 100.0 11.2 e 75.2 91.6 55.0 100.0 34.6 y 76.2 93.4 48.4 100.0 10.1 ust 78.7 93.6 55.1 100.0 36.7 ummer 76.7 92.9 52.9 100.0 10.1 tember 77.9 91.8 56.8 100.0 29.3 ober 71.5 89.9 43.2 100.0 19.7 vember 69.0 87.0 47.4 96.5 26.9 ll 72.8 89.6 49.1 100.0 19.7 nual 73.0 89.8 50.9 100.0 10.1

  • Meteorological facility located 0.8 km SSW of Watts Bar Nuclear Plant.

Temperature and dewpoint instruments at 4 feet above ground.

2 METEOROLOGY

Table 2.3-11 Absolute Humidity (Gm/m3)*

Watts Bar Nuclear Plant Meteorological Facility**

July 1, 1973 - June 30, 1975 nth Average Avg. Max. Avg. Min. Extreme Max. Extreme Min.

cember 5.2 6.6 4.0 14.5 1.5 uary 6.1 7.8 4.3 13.2 1.0 ruary 5.7 7.3 4.3 15.1 1.5 inter 5.7 7.2 4.2 15.1 1.0 rch 7.1 8.9 5.3 14.7 1.8 il 8.3 10.3 6.4 17.7 2.0 y 13.7 15.9 11.6 21.5 4.9 ring 9.7 11.7 7.8 21.5 1.8 e 14.7 17.2 12.4 22.1 7.8 y 17.1 19.3 13.7 22.7 1.8 ust 16.7 18.9 14.9 24.4 10.1 mmer 16.2 18.4 13.7 24.4 1.8 tember 14.4 16.5 12.5 21.9 4.9 ober 9.2 11.0 7.7 17.7 3.1 vember 7.0 8.7 5.4 16.6 2.1 ll 10.2 12.1 8.5 21.9 2.1 nnual 10.4 12.4 8.5 24.4 1.0

  • Calculations based on temperature and dewpoint measurements 4 feet above ground.
    • Meteorological facility located 0.8 km SSW of Watts Bar Nuclear Plant.

EOROLOGY 2.3-33

Table 2.3-12 Fog Data*

Est. from a b c nth Chat. Knox. Oak R. Hardwickd uary 3 3 1 1 ruary 2 2 1 2 rch 2 1 1 1 il 2 1 1 1 y 2 2 2 2 e 2 2 2 2 y 2 2 3 2 ust 3 3 4 3 tember 4 4 4 4 ober 6 5 8 6 vember 4 3 6 4 cember 4 3 2 3 nual 36 32 34 33 4 METEOROLOGY

TTS BAR Plant Jan 1, 74 - Dec 31, 88 WIND SPEED(MPH)

D TION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.41 8.5-24.4 >=24.5 TOTAL 0.067 0.683 1.401 1.693 1.432 1.586 0.076 0.000 0.000 6.938 E 0.065 0.588 1.432 2.102 1.996 2.189 0.120 0.000 0.000 8.492 0.081 0.690 1.815 1.663 1.079 0.747 0.011 0.001 0.000 6.088 E 0.131 1.066 3.004 1.354 0.487 0.176 0.003 0.000 0.000 6.221 0.087 0.995 1.687 0.660 0.172 0.054 0.002 0.000 0.000 3.658 E 0.030 0.405 0.537 0.205 0.034 0.015 0.001 0.000 0.000 1.227 0.047 0.595 0.851 0.340 0.081 0.058 0.018 0.000 0.000 1.990 E 0.083 0.890 1.670 0.627 0.196 0.170 0.043 0.004 0.000 3.681 0.114 0.995 2.551 1.848 0.893 0.778 0.213 0.026 0.001 7.419 W 0.140 1.079 3.265 3.970 3.067 3.351 0.716 0.064 0.000 15.652 0.116 1.240 2.363 1.471 0.807 0.556 0.092 0.005 0.001 6.650 W 0.127 1.730 2.208 0.694 0.394 0.363 0.105 0.005 0.000 5.626 0.130 2.012 2.003 0.678 0.586 0.701 0.110 0.010 0.002 6.232 W 0.119 2.059 1.613 0.633 0.563 0.805 0.092 0.006 0.000 5.890 0.158 2.581 2.308 0.783 0.738 1.082 0.116 0.002 0.000 7.768 W 0.097 1.445 1.572 1.016 0.944 1.309 0.083 0.001 0.000 6.468 TAL 1.593 19.055 30.279 19.737 13.471 13.939 1.799 0.124 0.004 100.000 n number of days with heavy fog, which is defined by horizontal visibility 1/4 mile or less.

l Climatological Data, Annual Summary with Comparative Data, 1974, Chattanooga, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, h Carolina. Period of record, 1931-1974.

l Climatological Data, Annual Summary with Comparative Data, 1974, Knoxville, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, h Carolina. Period of record, 1943-1974.

l Climatological Data, Annual Summary with Comparative Data, 1974, Oak Ridge, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, h Carolina. Period of record, 1951-1964.

WBNP-89 wick, W. C. "Monthly Fog Frequency in the Continental United States", Monthly Weather Review, Volume 101, October 1973, pages 763-766.

6 METEOROLOGY TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 88 Wind ( Wind Speed(Mph) ection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total 0.068 0.502 1.248 1.148 1.305 2.863 0.512 0.014 0.000 7.659 E 0.115 0.739 2.240 2.276 2.220 3.011 0.433 0.008 0.000 11.041 0.170 1.075 3.314 2.464 1.648 1.647 0.123 0.001 0.000 10.442 E 0.149 0.997 2.858 1.317 0.758 0.458 0.029 0.000 0.000 6.566 0.077 0.841 1.137 0.521 0.209 0.107 0.010 0.000 0.000 2.901 E 0.036 0.423 0.511 0.286 0.061 0.032 0.003 0.001 0.000 1.353 0.039 0.381 0.632 0.338 0.111 0.091 0.033 0.011 0.000 1.636 E 0.076 0.581 1.382 0.716 0.215 0.266 0.118 0.018 0.000 3.372 0.122 0.710 2.441 1.832 0.912 0.913 0.335 0.102 0.017 7.383 W 0.149 0.660 3.189 4.307 3.445 4.559 1.932 0.363 0.041 18.644 0.085 0.520 1.684 1.997 1.715 2.457 0.793 0.130 0.021 9.403 W 0.055 0.398 1.009 0.766 0.523 0.800 0.321 0.090 0.024 3.984 0.044 0.391 0.752 0.434 0.399 0.878 0.332 0.059 0.009 3.298 W 0.036 0.381 0.558 0.420 0.468 1.253 0.448 0.029 0.002 3.596 0.041 0.371 0.683 0.500 0.653 1.421 0.420 0.026 0.002 4.116 W 0.043 0.385 0.722 0.654 0.708 1.610 0.466 0.016 0.001 4.606 l 1.307 9.355 24.359 19,975 15.350 22.365 6.308 0.866 0.116 100.000 al Hours Of Valid Wind Observations al Hours Of Observations coverability Percentage teorological Facility Located 0.8 Km SSW Of Watts Bar Nuclear Plant 101227 d Speed And Direction Measured At 46.36 Meter Level 105192 an Wind Speed = 5.81 96.2 e: Totals And Subtotals Are Obtained From Unrounded Numbers WBNP-63

TTS BAR Disregarding Stability, Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 88 (Sheet 1 of 2) tence Wind Direction ACC. ACC.

urs) N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW CALM TOTAL TOTAL FREQUENCY 2 665 663 645 731 428 103 170 369 800 931 739 608 709 622 802 660 143 9788 21411 100.00 3 260 356 266 336 166 32 63 167 369 526 287 247 275 243 393 304 85 4375 11623 54.29 4 169 228 172 166 60 8 17 60 207 399 148 100 152 140 208 166 44 2444 7248 33.85 5 111 138 104 101 26 0 8 20 122 305 97 49 87 94 133 88 27 1510 4804 22.44 6 82 118 62 52 14 0 2 17 82 201 30 34 52 49 86 62 20 963 3294 15.38 7 59 74 51 28 6 0 3 3 38 200 27 17 18 24 50 38 12 648 2331 10.89 8 52 64 26 16 2 0 0 4 20 140 20 15 28 15 42 20 5 469 1683 7.86 9 28 32 10 8 0 0 0 2 14 106 11 5 6 14 18 24 4 282 1214 5.67 0 24 43 11 9 0 0 0 2 7 98 8 5 8 4 10 8 2 239 932 4.35 1 19 24 6 2 0 0 0 0 11 72 5 4 4 8 9 9 0 173 693 3.24 2 13 14 2 1 0 0 2 1 8 59 0 0 2 2 2 6 0 112 520 2.43 3 10 12 3 2 0 0 0 0 1 50 1 1 0 1 2 5 1 89 408 1.91 4 4 9 3 0 0 0 0 0 2 31 2 0 1 1 0 1 2 56 319 1.49 5 2 10 0 0 0 0 0 0 1 28 3 1 1 0 1 6 0 53 263 1.23 6 4 5 3 1 1 0 0 0 0 17 0 1 0 0 2 2 0 36 210 0.98 7 3 7 1 0 0 0 0 0 1 14 1 0 0 0 0 1 0 28 174 0.81 8 2 6 2 0 0 0 0 1 0 14 1 1 0 0 1 0 0 28 146 0.68 9 3 7 0 0 0 0 0 0 0 18 0 0 1 1 2 1 0 33 118 0.55 0 3 5 0 0 0 0 0 0 0 9 0 0 0 0 0 0 0 17 85 0.40 1 1 5 0 0 0 0 0 0 0 1 1 0 0 0 1 1 0 10 68 0.32 2 1 4 0 0 0 0 0 0 0 6 0 0 0 0 0 0 0 11 58 0.27 3 0 0 0 0 0 0 0 0 1 5 0 0 0 0 0 1 0 7 47 0.22 4 0 3 0 0 0 0 0 0 0 2 0 0 0 0 0 1 0 6 40 0.19 5 1 0 0 0 0 0 0 0 1 2 0 0 0 0 0 1 0 5 34 0.16 6 0 1 1 0 0 0 0 0 0 6 0 0 0 0 1 0 0 9 29 0.14 7 0 0 0 0 0 0 0 0 0 2 0 0 0 0 1 0 0 3 20 0.09 8 0 0 0 0 0 0 0 0 0 3 0 0 0 0 0 1 0 4 17 0.08 9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 13 0.06 WBNP-65

TTS BAR Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 88 (Sheet 2 of 2) tence Wind Direction ACC. ACC.

urs) N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW CALM TOTAL TOTAL FREQUENCY imum tence 25 37 26 16 16 4 12 18 25 44 21 18 19 19 27 28 14 urs) 0% 3 3 3 2 2 2 2 2 3 4 2 2 2 2 3 3 3 0% 6 6 5 4 3 3 3 3 4 8 4 4 4 4 5 4 5 0% 8 9 6 5 4 3 4 4 6 11 5 5 5 5 6 6 6 0% 16 20 12 10 7 4 7 8 11 22 11 10 10 11 11 15 10 9% 22 26 18 13 16 4 12 18 23 37 18 16 15 14 26 25 14 eorological Facility Located 0.8 Km SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At The 9.72 Meter Level WBNP-65

TTS BAR Disregarding Stability, Watts Bar Nuclear Plant Jan 1, 77 - Dec 31, 88 (Sheet 1 of 2) stence Wind Direction ACC. ACC.

urs) N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW CALM TOTAL TOTAL FREQUENCY 2 553 713 781 622 257 104 130 315 720 885 768 352 274 258 300 362 133 7527 17582 100.00 3 240 358 370 271 79 18 43 103 312 540 364 114 85 124 151 180 54 3406 10055 57.19 4 152 245 279 156 36 12 13 47 150 408 232 59 70 97 80 82 29 2147 6649 37.82 5 110 133 177 78 10 4 7 18 90 269 136 40 32 47 64 47 13 1275 4502 25.61 6 82 118 110 52 1 0 2 8 60 202 81 19 26 39 36 35 13 885 3227 18.35 7 63 97 89 24 3 0 3 5 29 174 51 9 11 23 24 22 1 625 2342 13.32 8 33 47 50 18 2 0 0 1 13 126 38 8 9 10 9 23 4 396 1717 9.77 9 34 41 41 4 0 0 1 1 8 100 35 8 5 11 11 15 0 315 1321 7.51 10 24 34 27 7 0 0 1 1 7 87 12 1 3 2 9 6 0 220 1006 5.72 11 13 18 12 2 0 0 0 0 5 66 9 3 0 4 6 11 2 152 786 4.47 12 16 25 24 1 0 0 0 1 2 60 8 1 1 2 4 8 0 152 634 3.61 13 4 17 8 0 0 0 0 0 1 43 8 1 1 0 4 0 0 88 482 2.74 14 13 14 8 0 0 0 0 0 0 46 3 0 2 2 4 3 0 93 394 2.24 15 6 16 6 0 0 0 0 0 0 36 2 2 1 0 2 1 0 74 301 1.71 16 4 9 4 0 0 0 0 0 0 19 0 0 1 1 4 2 0 41 227 1.29 17 2 6 2 0 0 0 0 0 0 17 1 0 0 0 1 1 0 30 186 1.06 18 1 9 2 0 0 0 0 0 0 16 1 0 0 0 1 0 0 31 156 0.89 19 3 7 1 0 0 0 0 0 0 12 1 0 0 1 1 0 0 25 125 0.71 20 0 2 0 0 0 0 0 0 0 13 2 1 0 0 0 0 0 19 100 0.57 21 1 3 1 0 0 0 0 0 0 5 2 0 0 0 1 0 0 12 81 0.46 22 2 5 1 0 0 0 0 0 0 10 1 0 0 0 0 0 0 20 69 0.39 23 0 2 0 0 0 0 0 0 0 7 2 0 0 0 1 0 0 11 49 0.28 24 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 38 0.22 25 0 3 0 0 0 0 0 0 0 4 0 0 0 0 0 0 0 9 37 0.21 26 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 2 28 0.16 27 1 1 1 0 0 0 0 0 0 2 0 0 0 0 0 0 0 5 26 0.15 WBNP-63 28 1 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 3 21 0.12 29 0 0 0 0 0 0 0 0 0 5 0 0 0 0 0 0 0 5 18 0.10

TTS BAR Watts Bar Nuclear Plant Jan 1, 77 - Dec 31, 88 (Sheet 2 of 2) 30 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 13 0.07 31 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 2 12 0.07 32 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 10 0.06 32 0 1 0 0 0 0 0 0 0 8 0 0 0 0 0 0 0 9 9 0.05 TAL 1358 1925 1995 1253 388 138 198 506 1397 3166 1760 618 521 621 709 798 249 17582 XIMUM STENCE URS) 28 33 27 12 8 5 9 18 13 41 32 20 16 19 22 17 11

.0% 3 3 3 2 2 2 2 2 2 4 3 2 2 3 3 3 2

.0% 6 6 5 4 3 3 3 3 4 8 5 4 4 5 5 5 4

.0% 8 9 7 5 4 4 4 4 5 11 7 5 6 6 7 7 5

.0% 16 19 14 9 7 5 8 8 10 23 14 11 12 11 15 12 8

.9% 27 30 26 11 8 5 9 18 12 34 25 20 16 19 27 17 11 eorological Facility Located 0.8 Km SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At The 9.72 Meter Level WBNP-63

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant January (74-88)

Wind Wind Speed(MPH) irection CALM 0.6-1.4 1.5-3.4 3.5-5. 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.061 0.640 1.288 1.471 1.764 2.266 0.101 0.000 0.000 7.591 NNE 0.068 0.484 1.654 2.293 2.193 2.211 0.128 0.000 0.000 9.032 NE 0.090 0.740 2.083 1.946 1.115 0.576 0.000 0.000 0.000 6.550 ENE 0.131 0.914 3.189 1.179 0.384 0.128 0.000 0.000 0.000 5.924 E 0.078 0.740 1.700 0.493 0.201 0.119 0.000 0.000 0.000 3.331 ESE 0.025 0.292 0.493 0.155 0.046 0.027 0.000 0.000 0.000 1.039 SE 0.034 0.320 0.758 0.192 0.037 0.000 0.000 0.000 0.000 1.341 SSE 0.074 0.667 1.663 0.402 0.101 0.018 0.037 0.027 0.000 2.989 S 0.067 0.402 1.709 1.124 0.841 0.503 0.201 0.018 0.000 4.864 SSW 0.111 0.704 2.778 3.445 2.440 2.979 0.685 0.027 0.000 13.168 SW 0.067 0.640 1.462 1.170 0.859 0.576 0.192 0.000 0.000 4.965 WSW 0.096 0.895 2.120 1.352 0.969 0.877 0.420 0.009 0.000 6.739 W 0.105 1.343 1.955 1.069 1.352 1.389 0.375 0.018 0.000 7.607 WNW 0.092 1.316 1.581 1.042 1.033 1.626 0.119 0.000 0.000 6.808 NW 0.128 1.663 2.348 1.279 1.462 2.239 0.247 0.000 0.000 9.366 NNW 0.097 1.096 1.937 1.489 1.553 2.339 0.174 0.000 0.000 8.686 BTOTAL 1.325 2.856 28.719 20.102 16.347 17.873 2.677 0.101 0.000 100.000 al Hours Of Valid Wind Observations 10944 al Hours Of Observations 11160 coverability Percentage 98.1 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 9.72 Meter Level an Wind Speed = 4.81 WBNP-63 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant January (77-88)

Wind Wind Speed (MPH)

Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.053 0.309 1.315 1.132 1.361 3.477 0.789 0.000 0.000 8.437 NNE 0.085 0.458 2.162 2.436 2.528 3.397 0.549 0.000 0.000 11.615 NE 0.106 0.606 2.642 2.768 2.207 1.990 0.057 0.000 0.000 10.377 ENE 0.099 0.595 2.448 1.155 0.595 0.229 0.000 0.000 0.000 5.120 E 0.067 0.606 1.453 0.309 0.069 0.034 0.000 0.000 0.000 2.538 ESE 0.020 0.252 0.366 0.092 0.023 0.000 0.000 0.000 0.000 0.752 SE 0.025 0.355 0.400 0.092 0.103 0.023 0.000 0.011 0.000 1.008 SSE 0.044 0.366 0.995 0.366 0.172 0.023 0.011 0.000 0.000 1.977 S 0.074 0.400 1.876 1.190 0.618 0.526 0.137 0.069 0.023 4.912 SSW 0.093 0.343 2.505 3.431 2.848 3.683 1.258 0.343 0.023 14.527 SW 0.055 0.377 1.315 1.441 1.521 2.642 0.789 0.103 0.046 8.290 WSW 0.041 0.275 0.995 0.721 0.618 1.418 0.503 0.252 0.092 4.914 W 0.034 0.252 0.801 0.435 0.869 1.658 0.732 0.297 0.046 5.124 WNW 0.027 0.286 0.538 0.709 1.075 2.573 0.858 0.034 0.000 6.100 NW 0.031 0.217 0.743 0.789 1.407 3.042 1.167 0.080 0.000 7.477 NNW 0.037 0.309 0.812 0.972 1.235 2.699 0.766 0.000 0.000 6.831 UBTOTAL 0.892 6.005 21.366 18.037 17.248 27.416 7.618 1.190 0.229 100.000 al Hours Of Valid Wind Observations 8743 al Hours Of Observations 8928 coverability Percentage 97.9 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed and Direction Measured at 46.36 Meter Level an Wind Speed = 6.57 WBNP-63 e: Totals and Subtotals are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant February (74-88)

Wind Wind Speed (MPH)

Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.077 0.595 1.795 1.704 1.523 2.158 0.061 0.000 0.000 7.912 NNE 0.079 0.666 1.805 2.693 2.521 2.572 0.141 0.000 0.000 10.477 NE 0.101 0.777 2.370 2.037 1.281 0.978 0.040 0.000 0.000 7.584 ENE 0.171 1.543 3.782 1.311 0.393 0.161 0.000 0.000 0.000 7.361 E 0.081 0.857 1.674 0.555 0.252 0.111 0.010 0.000 0.000 3.540 ESE 0.024 0.313 0.424 0.121 0.061 0.000 0.000 0.000 0.000 0.941 SE 0.031 0.464 0.514 0.192 0.030 0.050 0.000 0.000 0.000 1.282 SSE 0.046 0.514 0.918 0.383 0.141 0.151 0.050 0.010 0.000 2.214 S 0.075 0.605 1.745 0.988 0.474 0.524 0.383 0.030 0.000 4.825 SSW 0.099 0.756 2.340 2.652 2.229 3.267 1.412 0.071 0.000 12.826 SW 0.080 0.716 1.785 1.573 1.029 1.361 0.232 0.010 0.000 6.787 WSW 0.090 0.958 1.835 1.049 0.797 0.958 0.313 0.010 0.000 6.009 W 0.097 1.251 1.765 0.908 0.817 1.190 0.171 0.010 0.000 6.208 WNW 0.076 1.059 1.311 0.676 0.958 1.452 0.262 0.030 0.000 5.824 NW 0.131 1.795 2.279 0.918 1.261 1.835 0.212 0.000 0.000 8.430 NNW 0.084 1.008 1.624 1.392 1.180 2.309 0.182 0.000 0.000 7.779 SUBTOTAL 1.341 13.877 27.965 19.151 14.946 19.080 3.469 0.171 0.000 100.000 al Hours Of Valid Wind Observations 9916 al Hours Of Observations 10176 coverability Percentage 97.4 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 9.72 Meter Level WBNP-63 an Wind Speed = 4.92 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant February (77-88)

Wind Wind Speed (MPH) irection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.047 0.400 1.424 1.312 1.949 3.811 0.737 0.000 0.000 9.680 NNE 0.085 0.650 2.636 3.298 2.711 3.573 0.700 0.000 0.000 13.653 NE 0.126 0.737 4.123 3.136 2.411 2.011 0.325 0.000 0.000 12.869 ENE 0.096 0.925 2.799 1.524 0.887 0.462 0.050 0.000 0.000 6.743 E 0.040 0.550 0.987 0.437 0.125 0.075 0.050 0.000 0.000 2.264 ESE 0.016 0.262 0.350 0.200 0.012 0.000 0.000 0.000 0.000 0.840 SE 0.016 0.187 0.450 0.150 0.012 0.062 0.000 0.000 0.000 0.879 SSE 0.030 0.375 0.775 0.375 0.075 0.112 0.100 0.050 0.000 1.891 S 0.046 0.375 1.412 0.850 0.500 0.562 0.425 0.162 0.012 4.344 SSW 0.048 0.250 1.599 2.511 2.086 3.373 1.712 0.600 0.062 12.242 SW 0.038 0.325 1.162 1.937 1.562 2.699 1.262 0.250 0.037 9.271 WSW 0.028 0.287 0.812 0.712 0.525 1.349 0.650 0.162 0.050 4.576 W 0.024 0.287 0.650 0.487 0.487 1.462 0.525 0.125 0.000 4.047 WNW 0.020 0.362 0.425 0.412 0.550 2.174 0.737 0.062 0.000 4.743 NW 0.022 0.200 0.650 0.437 1.000 2.649 0.725 0.050 0.000 5.732 NNW 0.029 0.275 0.862 0.862 0.950 2.249 0.937 0.062 0.000 6.226 UBTOTAL 0.712 6.447 21.114 18.641 15.842 26.624 8.933 1.524 0.162 100.000 al Hours Of Valid Wind Observations 8004 al Hours Of Observations 8136 coverability Percentage 98.4 teorological Facility Located 0.8 Km SSW Of Watts Bar Nuclear Plant d Speed and Direction Measured at 46.36 Meter Level WBNP-63 an Wind Speed = 6.66 e: Totals and Subtotals are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant March (74-88)

Wind Wind Speed (MPH) rection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.057 0.503 1.406 1.565 1.500 2.310 0.149 0.000 0.000 7.489 NNE 0.061 0.652 1.397 1.751 1.621 2.459 0.121 0.000 0.000 8.062 NE 0.087 0.950 1.993 1.406 0.959 1.248 0.037 0.000 0.000 6.682 ENE 0.146 1.323 3.595 1.155 0.615 0.205 0.019 0.000 0.000 7.057 E 0.079 0.922 1.742 0.577 0.186 0.028 0.000 0.000 0.000 3.535 ESE 0.026 0.345 0.531 0.149 0.075 0.028 0.000 0.000 0.000 1.153 SE 0.037 0.568 0.689 0.317 0.158 0.224 0.140 0.000 0.000 2.133 SSE 0.052 0.633 1.118 0.568 0.261 0.475 0.168 0.000 0.000 3.275 S 0.060 0.624 1.397 1.313 0.671 1.341 0.587 0.112 0.009 6.114 SSW 0.079 0.624 2.049 3.484 3.335 5.933 2.133 0.084 0.000 17.721 SW 0.072 0.680 1.742 1.481 1.183 1.183 0.233 0.000 0.009 6.583 WSW 0.091 1.053 2.003 0.680 0.456 0.596 0.121 0.019 0.000 5.018 W 0.079 1.239 1.416 0.717 0.522 1.108 0.251 0.084 0.028 5.444 WNW 0.070 1.136 1.239 0.615 0.466 1.388 0.186 0.037 0.000 5.137 NW 0.100 1.574 1.816 1.127 0.913 1.993 0.289 0.028 0.000 7.841 NNW 0.060 0.857 1.174 1.080 1.323 2.077 0.177 0.009 0.000 6.757 BTOTAL 1.155 13.683 25.307 17.986 14.242 22.597 4.611 0.373 0.047 100.000 al Hours of Valid Wind Observations 10736 al Hours of Observations 11160 coverability Percentage 96.2 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed and Direction Measured At 9.72 Meter Level WBNP-63 an Wind Speed = 5.35 e: Totals and Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant March (77-88)

Wind Wind Speed (MPH) irection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.045 0.339 1.263 1.158 1.287 4.023 0.772 0.012 0.000 8.899 NNE 0.078 0.503 2.234 2.140 1.731 3.158 0.409 0.000 0.000 10.253 NE 0.120 0.819 3.415 2.433 1.380 1.988 0.269 0.000 0.000 10.424 ENE 0.082 0.538 2.351 1.076 0.690 0.620 0.082 0.000 0.000 5.439 E 0.040 0.538 0.877 0.573 0.316 0.175 0.023 0.000 0.000 2.543 ESE 0.023 0.292 0.503 0.211 0.105 0.058 0.000 0.000 0.000 1.192 SE 0.014 0.140 0.351 0.316 0.152 0.222 0.211 0.094 0.000 1.499 SSE 0.034 0.234 0.982 0.573 0.187 0.690 0.538 0.035 0.000 3.274 S 0.048 0.433 1.251 1.193 0.725 1.181 0.807 0.363 0.070 6.071 SSW 0.060 0.409 1.696 2.678 2.363 5.170 3.860 0.912 0.082 17.229 SW 0.041 0.351 1.099 1.719 2.012 3.392 1.813 0.409 0.058 10.895 WSW 0.029 0.211 0.807 0.819 0.573 0.924 0.526 0.105 0.023 4.017 W 0.024 0.257 0.596 0.386 0.351 1.064 0.620 0.082 0.035 3.416 WNW 0.018 0.222 0.409 0.456 0.468 1.485 0.819 0.094 0.023 3.995 NW 0.026 0.269 0.655 0.632 0.912 2.035 0.784 0.047 0.012 5.371 NNW 0.020 0.222 0.491 0.655 0.901 2.187 0.959 0.035 0.012 5.482 UBTOTAL 0.702 5.778 18.982 17.018 14.152 28.374 12.491 2.187 0.316 100.000 al Hours Of Valid Wind Observations 8550 al Hours Of Observations 8928 coverability Percentage 95.8 teorological Facility Located 0.8 KM S Of Watts Bar Nuclear Plant d Speed And Direction Measured At 46.36 Meter Level WBNP-63 an Wind Speed = 7.34 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant April (74-88)

Wind Wind Speed (MPH) irection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.041 0.656 0.994 1.254 1.254 1.611 0.154 0.000 0.000 5.964 NNE 0.042 0.569 1.148 1.968 1.650 2.228 0.183 0.000 0.000 7.789 NE 0.056 0.762 1.524 1.080 1.177 0.839 0.010 0.000 0.000 5.449 ENE 0.093 1.158 2.614 1.023 0.627 0.309 0.000 0.000 0.000 5.823 E 0.072 1.177 1.756 0.878 0.299 0.068 0.000 0.000 0.000 4.249 ESE 0.028 0.579 0.560 0.357 0.029 0.010 0.000 0.000 0.000 1.562 SE 0.033 0.704 0.627 0.424 0.135 0.058 0.000 0.000 0.000 1.982 SSE 0.052 0.714 1.399 0.714 0.318 0.328 0.164 0.010 0.000 3.699 S 0.067 1.023 1.688 1.505 0.839 0.994 0.598 0.106 0.000 6.820 SSW 0.083 0.907 2.479 3.126 3.454 6.174 1.978 0.376 0.000 18.577 SW 0.085 1.283 2.180 1.457 0.888 0.801 0.232 0.048 0.000 6.973 WSW 0.093 1.794 1.987 0.772 0.367 0.666 0.212 0.019 0.000 5.910 W 0.086 1.601 1.891 0.772 0.637 1.264 0.309 0.010 0.000 6.569 WNW 0.069 1.688 1.119 0.637 0.502 1.437 0.260 0.000 0.000 5.713 NW 0.087 1.804 1.708 0.743 0.762 1.611 0.280 0.000 0.000 6.994 NNW 0.063 1.225 1.331 0.801 0.820 1.553 0.135 0.000 0.000 5.928 BTOTAL 1.052 17.644 25.005 17.509 13.757 19.950 4.515 0.569 0.000 100.000 al Hours Of Valid Wind Observations 10366 al Hours Of Observations 10800 coverability Percentage 96.0 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 9.72 Meter Level WBNP-63 an Wind Speed = 5.08 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant April (77-88)

Wind Wind Speed (MPH) Wind rection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.044 0.335 0.881 0.906 0.844 2.581 0.546 0.012 0.000 6.148 NNE 0.085 0.533 1.799 1.650 1.762 2.643 0.633 0.012 0.000 9.117 NE 0.128 0.744 2.767 1.700 1.328 1.687 0.161 0.000 0.000 8.515 ENE 0.117 0.732 2.469 0.955 0.769 0.682 0.012 0.000 0.000 5.737 E 0.045 0.397 0.844 0.583 0.347 0.298 0.000 0.000 0.000 2.514 ESE 0.026 0.211 0.509 0.347 0.136 0.037 0.000 0.000 0.000 1.267 SE 0.021 0.149 0.434 0.434 0.186 0.099 0.025 0.000 0.000 1.349 SSE 0.049 0.372 0.968 0.844 0.248 0.459 0.273 0.112 0.000 3.324 S 0.080 0.521 1.663 1.625 1.042 0.968 0.571 0.236 0.087 6.792 SSW 0.106 0.484 2.419 3.337 3.437 5.943 4.007 0.893 0.211 20.838 SW 0.069 0.385 1.514 1.762 1.762 3.189 1.613 0.409 0.074 10.776 WSW 0.044 0.360 0.856 0.819 0.695 1.191 0.707 0.273 0.087 5.032 W 0.039 0.385 0.695 0.633 0.447 1.228 0.856 0.099 0.025 4.407 WNW 0.026 0.273 0.447 0.509 0.372 1.737 1.241 0.037 0.000 4.642 NW 0.035 0.273 0.695 0.471 0.806 1.861 0.558 0.087 0.000 4.787 NNW 0.028 0.285 0.496 0.583 0.645 1.861 0.806 0.050 0.000 4.756 BTOTAL 0.943 6.439 19.454 17.159 14.826 26.464 12.010 2.221 0.484 100.000 al Hours Of Valid Wind Observations 8060 al Hours Of Observations 8640 coverability Percentage 93.3 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 46.36 Meter Level an Wind Speed = 7.17 WBNP-63 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant May (74-88)

Wind Wind Speed (MPH)

Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.056 0.670 1.293 1.695 1.235 1.178 0.048 0.000 0.000 6.175 NNE 0.050 0.421 1.321 1.752 1.676 1.762 0.057 0.000 0.000 7.040 NE 0.069 0.642 1.791 1.800 1.092 0.948 0.000 0.000 0.000 6.341 ENE 0.115 1.025 3.026 1.446 0.776 0.354 0.010 0.000 0.000 6.751 E 0.095 1.369 1.982 0.891 0.268 0.038 0.010 0.000 0.000 4.654 ESE 0.036 0.603 0.670 0.306 0.029 0.019 0.000 0.000 0.000 1.664 SE 0.056 0.958 1.025 0.622 0.134 0.057 0.000 0.000 0.000 2.853 SSE 0.091 1.178 2.001 0.814 0.163 0.192 0.000 0.000 0.000 4.438 S 0.120 1.226 2.978 2.164 1.015 1.044 0.182 0.000 0.000 8.728 SSW 0.149 1.494 3.725 4.376 3.476 3.581 0.527 0.010 0.000 17.337 SW 0.112 1.513 2.432 1.695 0.929 0.718 0.067 0.000 0.000 7.467 WSW 0.120 2.269 1.934 0.479 0.335 0.153 0.019 0.000 0.000 5.310 W 0.125 2.375 2.001 0.622 0.440 0.335 0.019 0.000 0.000 5.918 WNW 0.084 1.599 1.341 0.613 0.440 0.393 0.000 0.000 0.000 4.469 NW 0.118 2.164 1.973 0.546 0.460 0.689 0.019 0.000 0.000 5.969 NNW 0.079 1.417 1.369 0.756 0.479 0.766 0.019 0.000 0.000 4.886 UBTOTAL 1.475 20.923 30.863 20.578 12.946 12.228 0.977 0.010 0.000 100.000 al Hours Of Valid Wind Observations 10443 al Hours Of Observations 11160 coverability Percentage 93.6 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 9.72 Meter Level WBNP-63 an Wind Speed = 4.00 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant May (77-88)

Wind Wind Speed (MPH)

Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.052 0.437 1.094 1.025 1.163 1.877 0.449 0.012 0.000 6.108 NNE 0.108 0.852 2.314 1.969 1.704 2.510 0.414 0.000 0.000 9.871 NE 0.161 1.255 3.454 2.349 1.301 1.531 0.104 0.000 0.000 10.154 ENE 0.135 1.025 2.924 1.255 0.817 0.829 0.058 0.000 0.000 7.042 E 0.067 0.691 1.266 0.679 0.253 0.150 0.000 0.000 0.000 3.106 ESE 0.033 0.242 0.714 0.495 0.058 0.058 0.012 0.000 0.000 1.610 SE 0.033 0.288 0.691 0.461 0.207 0.161 0.000 0.000 0.000 1.841 SSE 0.071 0.622 1.451 0.863 0.173 0.311 0.092 0.000 0.000 3.582 S 0.115 0.645 2.729 2.107 1.186 1.232 0.507 0.069 0.000 8.589 SSW 0.136 0.714 3.258 4.432 3.408 5.584 2.752 0.461 0.023 20.766 SW 0.083 0.507 1.923 2.233 2.107 2.821 0.840 0.138 0.000 10.652 WSW 0.059 0.587 1.128 0.702 0.541 0.806 0.242 0.035 0.000 4.100 W 0.047 0.449 0.933 0.449 0.311 0.679 0.196 0.000 0.000 3.064 WNW 0.036 0.437 0.610 0.391 0.368 0.702 0.173 0.000 0.000 2.718 NW 0.033 0.322 0.656 0.472 0.472 0.852 0.299 0.000 0.000 3.107 NNW 0.041 0.403 0.794 0.645 0.587 1.013 0.207 0.000 0.000 3.690 SUBTOTAL 1.209 9.475 25.938 20.527 14.656 21.114 6.344 0.714 0.023 100.000 al Hours Of Valid Wind Observations 8686 al Hours Of Observations 8928 coverability Percentage 97.3 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 46.36 Meter Level WBNP-63 an Wind Speed = 5.68 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant June (74-88)

Wind Wind Speed (MPH) irection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.050 0.387 1.038 2.011 1.218 1.152 0.057 0.000 0.000 5.912 NNE 0.046 0.387 0.925 1.671 1.624 2.096 0.217 0.000 0.000 6.965 NE 0.055 0.406 1.152 1.067 0.651 0.538 0.000 0.000 0.000 3.868 ENE 0.108 0.802 2.256 1.557 0.491 0.170 0.009 0.000 0.000 5.394 E 0.104 1.123 1.831 0.614 0.208 0.019 0.000 0.000 0.000 3.899 ESE 0.040 0.557 0.566 0.198 0.057 0.028 0.009 0.000 0.000 1.455 SE 0.072 0.934 1.114 0.453 0.047 0.000 0.009 0.000 0.000 2.630 SSE 0.115 1.350 1.907 0.755 0.245 0.094 0.000 0.000 0.000 4.466 S 0.175 1.444 3.530 2.558 1.303 0.727 0.028 0.000 0.000 9.765 SSW 0.222 1.378 4.937 5.560 4.219 3.426 0.198 0.000 0.000 19.941 SW 0.178 1.907 3.162 2.218 1.057 0.359 0.009 0.000 0.000 8.891 WSW 0.165 2.256 2.435 0.510 0.227 0.085 0.000 0.000 0.000 5.678 W 0.142 2.228 1.793 0.642 0.415 0.227 0.019 0.000 0.000 5.465 WNW 0.125 1.954 1.595 0.632 0.680 0.406 0.009 0.000 0.000 5.402 NW 0.144 2.435 1.652 0.538 0.576 0.444 0.019 0.000 0.000 5.808 NNW 0.081 1.180 1.114 0.840 0.680 0.529 0.038 0.000 0.000 4.461 BTOTAL 1.822 20.729 31.008 21.824 13.696 10.298 0.623 0.000 0.000 100.000 al Hours Of Valid Wind Observations 10594 al Hours Of Observations 10800 coverability Percentage 98.1 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 9.72 Meter Level WBNP-63 an Wind Speed = 3.78 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant June (77-88)

Wind Wind Speed (MPH)

Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.093 0.649 1.121 1.251 1.416 2.324 0.283 0.012 0.000 7.148 NNE 0.149 0.826 2.017 2.053 1.758 2.690 0.484 0.012 0.000 9.988 NE 0.212 1.380 2.666 1.817 1.003 1.168 0.024 0.012 0.000 8.282 ENE 0.193 1.050 2.643 1.286 0.790 0.437 0.012 0.000 0.000 6.411 E 0.099 0.826 1.062 0.602 0.212 0.153 0.000 0.000 0.000 2.954 ESE 0.049 0.366 0.566 0.342 0.083 0.047 0.000 0.012 0.000 1.465 SE 0.066 0.484 0.767 0.531 0.047 0.035 0.012 0.000 0.000 1.941 SSE 0.126 0.684 1.723 1.038 0.295 0.189 0.012 0.000 0.000 4.067 S 0.206 0.967 2.973 2.572 1.227 0.908 0.071 0.012 0.000 8.937 SSW 0.231 0.779 3.622 6.571 4.943 6.041 1.215 0.047 0.012 23.461 SW 0.127 0.613 1.817 2.572 2.194 2.926 0.519 0.012 0.000 10.781 WSW 0.080 0.413 1.121 0.779 0.401 0.708 0.106 0.000 0.000 3.608 W 0.050 0.378 0.578 0.330 0.366 0.602 0.071 0.024 0.000 2.398 WNW 0.062 0.625 0.566 0.354 0.472 0.802 0.071 0.000 0.000 2.953 NW 0.047 0.401 0.496 0.354 0.448 0.672 0.059 0.012 0.000 2.489 NNW 0.050 0.389 0.566 0.566 0.555 0.849 0.142 0.000 0.000 3.118 UBTOTAL 1.840 10.831 24.304 23.018 16.210 20.552 3.079 0.153 0.012 100.000 al Hours Of Valid Wind Observations 8476 al Hours Of Observations 8640 coverability Percentage 98.1 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 46.36 Meter Level WBNP-63 an Wind Speed = 5.14 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant July (74-88)

Wind Wind Speed (MPH)

Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.037 0.475 1.078 1.343 0.868 0.329 0.000 0.000 0.000 4.131 NNE 0.032 0.393 0.941 1.754 1.745 1.188 0.027 0.000 0.000 6.081 NE 0.038 0.393 1.179 1.663 1.106 0.375 0.009 0.000 0.000 4.762 ENE 0.073 0.621 2.421 1.626 0.731 0.155 0.000 0.000 0.000 5.629 E 0.066 0.950 1.791 0.996 0.210 0.073 0.000 0.000 0.000 4.087 ESE 0.034 0.484 0.914 0.457 0.073 0.000 0.000 0.000 0.000 1.962 SE 0.059 0.850 1.617 0.685 0.073 0.046 0.009 0.000 0.000 3.340 SSE 0.104 1.407 2.915 1.069 0.228 0.164 0.000 0.000 0.000 5.888 S 0.131 1.444 4.002 2.842 1.005 0.621 0.018 0.000 0.000 10.064 SSW 0.156 1.462 5.016 5.720 3.390 1.928 0.101 0.000 0.000 17.773 SW 0.140 1.672 4.139 1.919 0.768 0.311 0.000 0.000 0.000 8.949 WSW 0.124 2.266 2.860 0.567 0.174 0.091 0.000 0.000 0.000 6.081 W 0.110 2.120 2.431 0.567 0.384 0.238 0.000 0.000 0.000 5.848 WNW 0.099 2.019 2.102 0.694 0.356 0.192 0.009 0.000 0.000 5.472 NW 0.107 2.166 2.257 0.484 0.393 0.274 0.009 0.000 0.000 5.690 NNW 0.060 1.243 1.234 0.749 0.612 0.338 0.009 0.000 0.000 4.245 SUBTOTAL 1.371 19.965 36.897 23.136 12.116 6.323 0.192 0.000 0.000 100.000 al Hours Of Valid Wind Observations 10944 al Hours Of Observations 11160 coverability Percentage 98.1 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 9.72 Meter Level WBNP-63 an Wind Speed = 3.43 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant July (77-88)

Wind Wind Speed (MPH)

Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.075 0.725 1.438 1.127 0.989 0.989 0.046 0.000 0.000 5.388 NNE 0.103 0.897 2.070 1.794 2.105 2.174 0.161 0.012 0.000 9.315 NE 0.144 1.346 2.818 1.875 1.438 1.035 0.012 0.000 0.000 8.666 ENE 0.123 0.943 2.622 1.622 1.127 0.472 0.035 0.000 0.000 6.943 E 0.067 0.667 1.265 0.886 0.472 0.081 0.000 0.000 0.000 3.437 ESE 0.031 0.288 0.621 0.483 0.138 0.081 0.000 0.000 0.000 1.642 SE 0.048 0.299 1.081 0.794 0.207 0.058 0.035 0.000 0.000 2.520 SSE 0.097 0.552 2.254 1.254 0.230 0.184 0.035 0.000 0.000 4.605 S 0.148 0.805 3.473 2.818 1.150 1.047 0.081 0.000 0.000 9.521 SSW 0.187 0.782 4.623 6.786 4.669 4.566 0.690 0.058 0.000 22.360 SW 0.101 0.495 2.427 3.036 2.116 2.082 0.391 0.012 0.000 10.659 WSW 0.054 0.552 1.024 0.978 0.518 0.460 0.104 0.012 0.000 3.700 W 0.047 0.437 0.932 0.725 0.414 0.460 0.092 0.000 0.000 3.107 WNW 0.039 0.472 0.667 0.368 0.414 0.575 0.035 0.012 0.000 2.581 NW 0.041 0.426 0.748 0.506 0.380 0.403 0.115 0.000 0.000 2.617 NNW 0.041 0.414 0.782 0.506 0.495 0.679 0.012 0.012 0.000 2.940 SUBTOTAL 1.346 10.098 28.844 25.555 16.860 15.342 1.840 0.115 0.000 100.000 al Hours Of Valid Wind Observations 8695 al Hours Of Observations 8928 coverability Percentage 97.4 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 46.36 Meter Level WBNP-63 an Wind Speed = 4.72 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant August (74-88)

Wind Wind Speed(MPH)

Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.056 0.671 1.526 1.949 1.214 0.837 0.018 0.000 0.000 6.272 NNE 0.038 0.303 1.186 1.775 2.133 1.637 0.037 0.000 0.000 7.109 NE 0.052 0.386 1.664 1.278 0.864 0.515 0.009 0.000 0.000 4.769 ENE 0.102 0.791 3.237 1.913 0.561 0.248 0.000 0.000 0.000 6.852 E 0.073 1.011 1.857 0.956 0.138 0.046 0.000 0.000 0.000 4.082 ESE 0.029 0.432 0.708 0.340 0.009 0.000 0.000 0.000 0.000 1.519 SE 0.048 0.680 1.223 0.543 0.129 0.120 0.000 0.000 0.000 2.743 SSE 0.096 1.232 2.538 1.140 0.313 0.147 0.000 0.000 0.000 5.466 S 0.143 1.517 4.110 3.338 1.205 0.754 0.009 0.000 0.000 11.076 SSW 0.166 1.674 4.855 4.754 3.034 1.830 0.028 0.000 0.000 16.340 SW 0.134 1.857 3.402 1.315 0.349 0.092 0.000 0.000 0.000 7.150 WSW 0.126 2.345 2.621 0.441 0.083 0.009 0.000 0.000 0.000 5.625 W 0.108 2.317 1.931 0.340 0.202 0.018 0.000 0.000 0.000 4.917 WNW 0.101 2.271 1.701 0.451 0.101 0.046 0.000 0.000 0.000 4.671 NW 0.137 2.989 2.418 0.478 0.257 0.101 0.009 0.000 0.000 6.390 NNW 0.082 1.462 1.766 0.644 0.644 0.414 0.009 0.000 0.000 5.020 SUBTOTAL 1.490 21.940 36.745 21.655 11.237 6.814 0.120 0.000 0.000 100.000 al Hours Of Valid Wind Observations 10875 al Hours Of Observations 11160 coverability Percentage 97.4 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 9.72 Meter Level WBNP-65 an Wind Speed = 3.36 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant August (77-88)

Wind Wind Speed (MPH)

Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.090 0.586 1.519 1.172 1.160 1.830 0.156 0.000 0.000 6.513 NNE 0.147 0.981 2.476 1.950 2.165 2.428 0.108 0.000 0.000 10.255 NE 0.218 1.292 3.828 2.022 1.244 0.957 0.060 0.000 0.000 9.620 ENE 0.185 1.160 3.194 2.093 0.945 0.586 0.036 0.000 0.000 8.200 E 0.100 0.981 1.376 0.801 0.239 0.144 0.012 0.000 0.000 3.653 ESE 0.051 0.467 0.742 0.562 0.084 0.048 0.012 0.000 0.000 1.965 SE 0.056 0.455 0.849 0.514 0.156 0.156 0.012 0.000 0.000 2.197 SSE 0.111 0.742 1.854 1.112 0.502 0.251 0.024 0.000 0.000 4.596 S 0.204 1.041 3.744 3.254 1.471 1.112 0.048 0.000 0.000 10.874 SSW 0.262 0.933 5.215 6.328 4.593 3.888 0.455 0.012 0.000 21.685 SW 0.129 0.634 2.404 2.416 1.495 1.148 0.156 0.000 0.000 8.383 WSW 0.062 0.455 1.005 0.694 0.263 0.191 0.036 0.000 0.000 2.706 W 0.047 0.443 0.670 0.287 0.144 0.179 0.012 0.000 0.000 1.782 WNW 0.045 0.383 0.670 0.335 0.227 0.120 0.012 0.000 0.000 1.791 NW 0.065 0.586 0.933 0.359 0.239 0.287 0.084 0.000 0.000 2.553 NNW 0.058 0.538 0.813 0.694 0.478 0.598 0.048 0.000 0.000 3.227 SUBTOTAL 1.830 11.675 31.292 24.593 15.407 13.923 1.268 0.012 0.000 100.000 al Hours Of Valid Wind Observations 8360 al Hours Of Observations 8928 coverability Percentage 93.6 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 46.36 Meter Level WBNP-63 an Wind Speed = 4.41 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant September (74-88)

Wind Wind Speed (MPH) rection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.083 0.889 1.960 2.323 1.682 1.262 0.019 0.000 0.000 8.218 NNE 0.062 0.621 1.520 2.648 2.352 3.231 0.076 0.000 0.000 10.511 NE 0.072 0.545 1.950 2.457 1.482 1.052 0.019 0.010 0.000 7.586 ENE 0.111 0.879 2.954 1.558 0.421 0.163 0.000 0.000 0.000 6.086 E 0.070 0.774 1.625 0.832 0.105 0.048 0.000 0.000 0.000 3.454 ESE 0.023 0.249 0.535 0.172 0.029 0.029 0.000 0.000 0.000 1.036 SE 0.035 0.363 0.841 0.258 0.086 0.019 0.019 0.000 0.000 1.622 SSE 0.070 0.822 1.587 0.707 0.229 0.076 0.000 0.000 0.000 3.492 S 0.124 1.338 2.935 2.084 1.195 0.841 0.029 0.000 0.000 8.546 SSW 0.125 1.204 3.088 3.872 2.753 1.587 0.076 0.000 0.000 12.705 SW 0.109 1.453 2.304 1.157 0.344 0.096 0.000 0.000 0.000 5.462 WSW 0.108 1.960 1.768 0.325 0.057 0.010 0.000 0.000 0.000 4.228 W 0.130 2.619 1.864 0.268 0.229 0.057 0.000 0.000 0.000 5.168 WNW 0.150 3.221 1.960 0.507 0.249 0.134 0.000 0.000 0.000 6.221 NW 0.197 4.130 2.638 0.574 0.401 0.335 0.000 0.000 0.000 8.274 NNW 0.127 2.189 2.180 1.147 0.784 0.965 0.000 0.000 0.000 7.392 BTOTAL 1.596 23.258 31.708 20.887 12.398 9.903 0.239 0.010 0.000 100.000 al Hours Of Valid Wind Observations 10461 al Hours Of Observations 10800 coverability Percentage 96.9 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 9.72 Meter Level WBNP-63 an Wind Speed = 3.62 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant September (77-88)

Wind Wind Speed(MPH)

Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.086 0.602 1.332 1.537 1.588 2.843 0.179 0.000 0.000 8.166 NNE 0.155 0.999 2.484 2.651 2.907 3.893 0.589 0.000 0.000 13.677 NE 0.247 1.524 4.034 3.240 1.959 2.228 0.154 0.000 0.000 13.385 ENE 0.211 1.498 3.253 1.626 0.820 0.576 0.026 0.000 0.000 8.009 E 0.095 1.191 0.960 0.474 0.192 0.064 0.000 0.000 0.000 2.977 ESE 0.052 0.627 0.538 0.423 0.064 0.051 0.013 0.000 0.000 1.768 SE 0.061 0.551 0.820 0.269 0.102 0.077 0.038 0.013 0.000 1.930 SSE 0.111 0.845 1.665 0.960 0.282 0.320 0.000 0.000 0.000 4.184 S 0.170 0.948 2.881 2.113 0.948 1.165 0.115 0.013 0.000 8.353 SSW 0.208 1.076 3.611 4.444 3.573 3.714 0.756 0.090 0.000 17.470 SW 0.108 0.743 1.690 1.793 1.447 1.268 0.026 0.000 0.000 7.074 WSW 0.062 0.410 0.986 0.602 0.256 0.128 0.026 0.000 0.000 2.469 W 0.048 0.474 0.615 0.333 0.141 0.231 0.013 0.000 0.000 1.854 WNW 0.051 0.448 0.692 0.269 0.231 0.448 0.013 0.000 0.000 2.151 NW 0.057 0.525 0.768 0.410 0.295 0.538 0.000 0.000 0.000 2.593 NNW 0.059 0.576 0.756 0.653 0.602 1.165 0.128 0.000 0.000 3.939 UBTOTAL 1.780 13.036 27.084 21.795 15.405 18.709 2.075 0.115 0.000 100.000 al Hours Of Valid Wind Observations 7809 al Hours Of Observations 8640 coverability Percentage 90.4 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 46.36 Meter Level WBNP-63 an Wind Speed = 4.80 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant October (74-88)

Wind Wind Speed (MPH) irection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.133 1.093 1.782 1.874 1.893 2.141 0.046 0.000 0.000 8.961 NNE 0.109 0.818 1.553 2.361 2.085 2.260 0.175 0.000 0.000 9.361 NE 0.119 0.790 1.801 1.902 1.231 0.818 0.000 0.000 0.000 6.661 ENE 0.189 1.406 2.701 1.415 0.404 0.156 0.000 0.000 0.000 6.271 E 0.099 0.937 1.222 0.469 0.147 0.092 0.000 0.000 0.000 2.966 ESE 0.030 0.340 0.312 0.083 0.000 0.028 0.000 0.000 0.000 0.793 SE 0.048 0.533 0.514 0.101 0.064 0.037 0.000 0.000 0.000 1.298 SSE 0.102 0.836 1.378 0.312 0.184 0.083 0.028 0.000 0.000 2.922 S 0.151 1.029 2.251 1.764 0.827 0.597 0.083 0.000 0.000 6.701 SSW 0.174 1.102 2.683 3.197 2.398 2.251 0.202 0.000 0.000 12.007 SW 0.145 1.323 1.828 0.983 0.496 0.220 0.009 0.000 0.000 5.005 WSW 0.189 1.929 2.177 0.459 0.175 0.101 0.009 0.000 0.000 5.040 W 0.235 2.912 2.186 0.469 0.303 0.423 0.000 0.000 0.000 6.528 WNW 0.256 3.721 1.837 0.671 0.606 0.661 0.028 0.000 0.000 7.780 NW 0.364 4.695 3.197 0.726 0.524 0.717 0.046 0.000 0.000 10.267 NNW 0.181 2.067 1.865 1.222 0.818 1.277 0.009 0.000 0.000 7.439 UBTOTAL 2.526 25.531 29.288 18.006 12.154 11.860 0.634 0.000 0.000 100.000 al Hours Of Valid Wind Observations 10885 al Hours Of Observations 11160 coverability Percentage 97.5 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 9.72 Meter Level WBNP-63 an Wind Speed = 3.69 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant October (77-88)

Wind Wind Speed (MPH)

Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.082 0.524 1.161 1.002 1.593 3.654 0.592 0.000 0.000 8.607 NNE 0.162 0.774 2.561 2.686 2.436 2.971 0.216 0.000 0.000 11.805 NE 0.226 1.320 3.346 2.629 1.787 1.730 0.023 0.000 0.000 11.062 ENE 0.250 1.502 3.665 1.093 0.774 0.307 0.034 0.000 0.000 7.626 E 0.137 1.662 1.172 0.330 0.182 0.114 0.023 0.000 0.000 3.620 ESE 0.065 0.956 0.376 0.171 0.011 0.000 0.000 0.000 0.000 1.578 SE 0.064 0.717 0.603 0.137 0.057 0.080 0.011 0.000 0.000 1.669 SSE 0.120 1.024 1.457 0.535 0.171 0.285 0.080 0.000 0.000 3.671 S 0.182 1.161 2.595 1.696 0.797 0.774 0.273 0.046 0.000 7.523 SSW 0.213 0.933 3.460 4.086 3.517 3.904 1.559 0.137 0.000 17.809 SW 0.124 0.774 1.776 1.593 1.389 1.650 0.387 0.034 0.000 7.727 WSW 0.075 0.444 1.104 0.615 0.455 0.421 0.137 0.000 0.000 3.251 W 0.072 0.558 0.922 0.273 0.307 0.615 0.205 0.000 0.000 2.951 WNW 0.044 0.330 0.580 0.364 0.433 1.195 0.387 0.011 0.000 3.345 NW 0.049 0.444 0.569 0.421 0.546 1.138 0.205 0.000 0.000 3.373 NNW 0.048 0.387 0.603 0.501 0.706 1.730 0.410 0.000 0.000 4.384 Subtotal 1.912 13.510 25.950 18.131 15.160 20.567 4.541 0.228 0.000 100.000 al Hours Of Valid Wind Observations 8786 al Hours Of Observations 8928 coverability Percentage 98.4 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 46.36 Meter Level WBNP-63 an Wind Speed = 5.18 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant November (74-88)

Wind Wind Speed (MPH)

Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.131 0.988 1.315 1.660 1.459 1.631 0.182 0.000 0.000 7.367 NNE 0.178 1.017 2.111 2.601 2.476 2.351 0.096 0.000 0.000 10.831 NE 0.185 0.998 2.255 1.718 1.180 0.441 0.010 0.000 0.000 6.788 ENE 0.252 1.296 3.129 1.084 0.202 0.029 0.000 0.000 0.000 5.991 E 0.163 1.171 1.689 0.441 0.019 0.010 0.000 0.000 0.000 3.493 ESE 0.047 0.413 0.413 0.077 0.000 0.010 0.000 0.000 0.000 0.959 SE 0.054 0.413 0.528 0.144 0.048 0.067 0.029 0.000 0.000 1.282 SSE 0.090 0.489 1.094 0.374 0.096 0.240 0.029 0.000 0.000 2.413 S 0.159 0.672 2.121 1.142 0.691 0.758 0.259 0.000 0.000 5.802 SSW 0.190 0.806 2.524 3.292 2.649 3.426 0.710 0.048 0.000 13.645 SW 0.159 0.940 1.843 1.142 0.873 0.384 0.058 0.000 0.000 5.399 WSW 0.211 1.545 2.150 0.749 0.461 0.422 0.086 0.000 0.000 5.623 W 0.262 2.236 2.361 0.749 0.787 0.950 0.048 0.000 0.000 7.393 WNW 0.255 2.668 1.804 0.470 0.528 0.797 0.096 0.000 0.000 6.618 NW 0.311 2.985 2.466 1.065 0.854 1.200 0.106 0.000 0.000 8.986 NNW 0.203 1.996 1.574 1.084 1.152 1.334 0.067 0.000 0.000 7.411 UBTOTAL 2.850 20.633 29.376 17.793 13.474 14.050 1.775 0.048 0.000 100.000 al Hours Of Valid Wind Observations 10420 al Hours Of Observations 10800 coverability Percentage 96.5 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 9.72 Meter Level WBNP-63 an Wind Speed = 4.11 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant November (77-88)

Wind Wind Speed (MPH)

Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.082 0.591 1.276 0.969 1.146 3.118 0.768 0.047 0.000 7.996 NNE 0.138 0.886 2.280 2.315 2.658 3.331 0.461 0.012 0.000 12.080 NE 0.226 1.146 4.028 2.988 1.996 1.996 0.130 0.000 0.000 12.511 ENE 0.209 1.299 3.485 1.240 0.543 0.165 0.000 0.000 0.000 6.942 E 0.111 1.122 1.417 0.331 0.106 0.000 0.000 0.000 0.000 3.088 ESE 0.044 0.614 0.390 0.059 0.012 0.000 0.000 0.000 0.000 1.119 SE 0.051 0.602 0.567 0.189 0.071 0.083 0.024 0.000 0.000 1.587 SSE 0.088 0.626 1.394 0.378 0.154 0.224 0.201 0.012 0.000 3.077 S 0.132 0.661 2.351 1.264 0.638 0.803 0.591 0.165 0.000 6.605 SSW 0.160 0.650 3.000 3.284 2.634 4.181 2.091 0.307 0.024 16.330 SW 0.087 0.579 1.406 1.595 1.240 2.303 0.780 0.047 0.012 8.048 WSW 0.070 0.378 1.228 0.827 0.685 0.850 0.425 0.142 0.012 4.618 W 0.056 0.472 0.803 0.366 0.484 1.051 0.319 0.024 0.000 3.576 WNW 0.036 0.307 0.508 0.425 0.378 1.158 0.413 0.000 0.000 3.225 NW 0.051 0.449 0.709 0.602 0.567 1.571 0.378 0.000 0.000 4.327 NNW 0.067 0.472 1.051 0.543 0.543 1.843 0.354 0.000 0.000 4.874 Subtotal 1.606 10.855 25.892 17.375 13.855 22.679 6.934 0.756 0.047 100.000 al Hours Of Valid Wind Observations 8466 al Hours Of Observations 8640 coverability Percentage 98.0 teorological Facility Located 0.8 Km SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 46.36 Meter Level WBNP-63 an Wind Speed = 5.75 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant December (74-88)

Wind Wind Speed (MPH) irection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.046 0.632 1.350 1.475 1.580 2.212 0.077 0.000 0.000 7.373 NNE 0.056 0.747 1.667 2.011 1.916 2.347 0.182 0.000 0.000 8.925 NE 0.069 0.919 2.069 1.628 0.833 0.670 0.000 0.000 0.000 6.189 ENE 0.099 1.082 3.199 0.948 0.220 0.029 0.000 0.000 0.000 5.577 E 0.053 0.919 1.379 0.211 0.038 0.000 0.010 0.000 0.000 2.610 ESE 0.013 0.259 0.297 0.029 0.000 0.000 0.000 0.000 0.000 0.597 SE 0.024 0.345 0.709 0.134 0.029 0.019 0.010 0.000 0.000 1.269 SSE 0.051 0.785 1.408 0.249 0.067 0.077 0.038 0.000 0.000 2.675 S 0.060 0.584 2.030 1.245 0.613 0.632 0.201 0.048 0.000 5.414 SSW 0.078 0.805 2.567 4.023 3.410 3.965 0.632 0.163 0.000 15.641 SW 0.065 0.852 1.983 1.552 0.939 0.642 0.086 0.000 0.000 6.118 WSW 0.092 1.446 2.548 0.958 0.661 0.431 0.086 0.000 0.000 6.222 W 0.099 1.858 2.423 1.034 0.967 1.264 0.134 0.000 0.000 7.780 WNW 0.086 1.992 1.724 0.575 0.862 1.178 0.153 0.010 0.000 6.579 NW 0.125 2.509 2.921 0.919 1.034 1.619 0.163 0.000 0.000 9.291 NNW 0.076 1.599 1.695 1.006 1.293 1.887 0.182 0.000 0.000 7.738 Subtotal 1.092 17.336 29.968 17.996 14.462 16.972 1.954 0.220 0.000 100.000 al Hours Of Valid Wind Observations 10441 al Hours Of Observations 11160 coverability Percentage 93.6 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 9.72 Meter Level WBNP-63 an Wind Speed = 4.50 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant December (77-88)

Wind Wind Speed (MPH)

Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.051 0.524 1.152 1.222 1.199 3.852 0.803 0.070 0.000 8.873 NNE 0.072 0.524 1.862 2.421 2.235 3.457 0.512 0.047 0.000 11.129 NE 0.106 0.733 2.770 2.665 1.757 1.501 0.186 0.000 0.000 9.719 ENE 0.096 0.722 2.456 0.919 0.349 0.163 0.000 0.000 0.000 4.705 E 0.053 0.838 0.919 0.244 0.000 0.000 0.012 0.000 0.000 2.067 ESE 0.028 0.489 0.454 0.070 0.012 0.000 0.000 0.000 0.000 1.053 SE 0.027 0.338 0.570 0.163 0.023 0.035 0.023 0.012 0.000 1.191 SSE 0.047 0.524 1.036 0.314 0.105 0.151 0.047 0.012 0.000 2.235 S 0.086 0.559 2.293 1.280 0.640 0.687 0.396 0.093 0.012 6.045 SSW 0.113 0.570 3.177 3.678 3.212 4.609 2.828 0.512 0.058 18.758 SW 0.063 0.454 1.641 1.851 1.699 3.305 0.954 0.163 0.023 10.154 WSW 0.043 0.396 1.013 0.908 0.722 1.141 0.407 0.105 0.023 4.756 W 0.033 0.303 0.791 0.500 0.442 1.292 0.349 0.058 0.000 3.769 WNW 0.031 0.431 0.582 0.431 0.594 2.037 0.640 0.093 0.000 4.837 NW 0.028 0.349 0.582 0.524 0.745 1.990 0.640 0.035 0.012 4.905 NNW 0.030 0.361 0.640 0.675 0.791 2.432 0.838 0.035 0.000 5.803 Subtotal 0.908 8.112 21.939 17.865 14.525 26.653 8.636 1.234 0.128 100.000 al Hours Of Valid Wind Observations 8592 al Hours Of Observations 8928 coverability Percentage 96.2 teorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant d Speed And Direction Measured At 46.36 Meter Level WBNP-63 an Wind Speed = 6.45 e: Totals And Subtotals Are Obtained From Unrounded Numbers

THIS PAGE INTENTIONALLY BLANK 6 METEOROLOGY

Table 2.3-41 Percent Occurrence Of Wind Speed*

For All Wind Directions July 1, 1971 - June 28, 1972 Annual Wind Wind Speed (MPH)**

Direction 1-3 4-7 8-12 13-18 > 19 Total N 4.33 1.07 0.14 0.03 - 5.57 NNE 4.16 2.11 0.29 0.01 - 6.57 NE 5.26 4.12 0.49 - - 9.87 ENE 3.90 2.07 0.23 0.01 - 6.21 E 1.64 0.50 0.04 - - 2.18 ESE 1.11 0.45 0.25 - - 1.81 SE 1.72 0.50 0.33 - - 2.55 SSE 2.27 0.81 0.16 - - 3.24 S 2.94 2.83 0.68 0.15 - 6.60 SSW 2.54 4.69 1.80 0.33 - 9.36 SW 2.54 3.08 0.62 0.04 - 6.28 WSW 2.07 1.08 0.20 0.03 - 3.38 W 2.18 1.26 1.02 0.09 - 4.55 WNW 2.38 1.21 0.90 0.01 - 4.50 NW 4.97 1.74 0.73 0.06 - 7.50 NNW 5.71 2.13 0.29 0.05 - 8.18 Total 49.72 29.65 8.17 0.81 - 88.35 Calm = 11.64 All columns and calm total 100 percent of net valid observations, which represent 91 percent of total record.

  • Watts Bar temporary meteorological facility. Wind instruments 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.

EOROLOGY 2.3-67

TTS BAR Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 88 STABILITY CLASS INVERSIONS A B C D E F G RY 29.5 2.2 2.1 4.6 47.5 27.4 11.1 5.0 ARY 34.0 3.5 3.6 5.8 42.3 23.8 12.2 8.9 36.6 4.9 4.0 6.5 36.9 24.3 12.1 11.2 39.8 5.1 4.1 7.7 32.7 22.5 13.0 14.9 40.2 4.1 3.8 7.2 33.5 26.1 17.0 8.3 40.9 5.3 4.8 8.6 31.0 26.7 17.5 6.1 38.7 4.8 4.3 8.5 32.8 29.1 16.0 4.5 T 39.6 4.8 4.0 7.6 31.9 32.7 16.3 2.8 MBER 40.5 4.9 4.5 6.8 31.9 30.5 17.6 3.9 ER 43.8 3.9 3.7 6.6 32.7 24.3 20.5 8.3 BER 40.3 1.6 2.1 4.7 39.3 27.1 14.9 10.3 BER 37.5 1.6 1.8 5.0 42.0 27.4 14.1 8.1 AL 38.5 3.9 3.6 6.6 36.2 26.9 15.2 7.6 nversion Conditions Distributed Within Total Hours With Valid Vertical Temperature Difference Data. Stability Classes Distributed Within otal Hours With Valid Wind Direction, Wind Speed, And Vertical Temperature Difference Data.

eteorological Facility Located 0.8 Km Ssw Of Watts Bar Nuclear Plant. Temperature Difference Between 9.51 And 45.63 Meters And Wind irection And Wind Speed At 9.72 Meter Level.

WBNP-63

Table 2.3-43 Deleted By Amendment 63 EOROLOGY 2.3-69

TTS BAR Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 88 (Delta-T Given In Degrees Celsius) (Sheet 1 of 2)

DISREGARDING INVERSION E F G F AND G STRENGTH O. HOURS 0.0<DELTA-T<=1.5 1.5<DELTA-T<=4.0 DELT A-T>4.0 DELT A-T>1.5 DELTA-T>0.0 2 1522 835 390 289 631 3 748 535 242 238 423 4 533 453 218 234 302 5 359 384 200 206 252 6 249 374 146 246 241 7 170 296 113 226 208 8 107 203 76 227 190 9 63 174 92 262 206 10 53 112 70 300 230 11 45 97 70 352 336 12 30 48 41 300 591 13 16 22 29 271 543 14 6 14 21 157 421 15 4 3 4 113 334 16 1 1 1 35 185 17 1 0 0 6 74 18 0 0 0 1 17 19 0 1 0 2 7 20 0 0 0 1 0 21 0 0 0 1 1 22 0 0 0 0 0 23 0 0 0 0 0 24 0 0 0 0 0 25 0 0 0 0 0 26 0 0 0 0 0 27 0 0 0 0 0 28 0 0 0 0 0 29 0 0 0 0 0 30 0 0 0 0 0 31 0 0 0 0 0 WBNP-63 32 0 0 0 0 0

>=32 0 0 0 0 0

TTS BAR Jan 1, 74 - Dec 31, 88 (Delta-T Given In Degrees Celsius) (Continued) (Sheet 2 of 2)

DISREGARDING INVERSION E F G F AND G STRENGTH O. HOURS 0.0<DELTA-T<=1.5 1.5<DELTA-T<=4.0 DELT A-T>4.0 DELT A-T>1.5 DELTA-T>0.0 TOTAL 3907 3552 1713 3467 5193 imum Hours Persistence 17 19 16 21 45 orological Facility Located 0.8 Km SSW Of Watts Bar Nuclear Plant Temperature Instruments Located 45.63 And 9.51 Meters Above Ground uary 1982 WBNP-63

TTS BAR Stability Class A (Delta T<=-1.9 C/100 M),

Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 88 ind Wind Speed (MPH) ection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.000 0.001 0.009 0.020 0.030 0.067 0.003 0.000 0.000 0.129 NNE 0.000 0.001 0.009 0.063 0.077 0.156 0.006 0.000 0.000 0.311 NE 0.000 0.000 0.030 0.077 0.074 0.092 0.000 0.000 0.000 0.273 ENE 0.000 0.001 0.028 0.067 0.080 0.037 0.000 0.000 0.000 0.213 E 0.000 0.002 0.031 0.037 0.019 0.006 0.000 0.000 0.000 0.095 ESE 0.000 0.000 0.014 0.011 0.002 0.001 0.000 0.000 0.000 0.028 SE 0.000 0.001 0.015 0.026 0.005 0.002 0.001 0.000 0.000 0.050 SSE 0.000 0.001 0.030 0.047 0.020 0.016 0.002 0.000 0.000 0.117 S 0.000 0.001 0.037 0.103 0.112 0.121 0.015 0.001 0.000 0.391 SW 0.000 0.001 0.032 0.167 0.388 0.744 0.130 0.007 0.000 1.468 SW 0.000 0.000 0.009 0.067 0.113 0.120 0.015 0.000 0.000 0.323 SW 0.000 0.000 0.005 0.020 0.015 0.072 0.025 0.002 0.000 0.139 W 0.000 0.000 0.003 0.010 0.012 0.060 0.019 0.001 0.000 0.105 NW 0.000 0.000 0.001 0.005 0.008 0.028 0.007 0.000 0.000 0.049 NW 0.000 0.000 0.003 0.006 0.011 0.029 0.008 0.000 0.000 0.057 NW 0.000 0.001 0.005 0.024 0.040 0.068 0.013 0.000 0.000 0.151 TOTAL 0.001 0.009 0.262 0.747 1.006 1.618 0.244 0.011 0.000 3.898 l Hours Of Valid Stability Observations 125417 l Hours Of Stability Class A 4884 l Hours Of Valid Wind Direction-Wind Speed-Stability Class A 4789 l Hours Of Valid Wind Direction-Wind Speed-Stability Observations 122869 eorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant bility Based On Delta-T Between And 45.63 Meters d Speed And Direction Measured At 9.72 Meter Level WBNP-63 n Wind Speed = 7.57 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR Stability Class B (-1.9< Delta T<=-1.7 C/100 M),

Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 88 ind Wind Speed (MPH) ction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.000 0.000 0.015 0.051 0.046 0.080 0.007 0.000 0.000 0.199 NE 0.000 0.001 0.037 0.103 0.124 0.203 0.015 0.000 0.000 0.483 E 0.000 0.000 0.051 0.112 0.107 0.085 0.002 0.000 0.000 0.357 NE 0.000 0.001 0.045 0.096 0.077 0.029 0.000 0.000 0.000 0.248 E 0.000 0.001 0.055 0.061 0.019 0.002 0.000 0.000 0.000 0.137 SE 0.000 0.002 0.018 0.024 0.002 0.001 0.000 0.000 0.000 0.047 E 0.000 0.000 0.023 0.029 0.003 0.002 0.002 0.000 0.000 0.059 SE 0.000 0.001 0.042 0.050 0.017 0.007 0.000 0.000 0.000 0.116 S 0.000 0.002 0.043 0.115 0.072 0.061 0.011 0.002 0.000 0.306 SW 0.000 0.000 0.047 0.176 0.296 0.257 0.049 0.004 0.000 0.829 W 0.000 0.000 0.020 0.088 0.093 0.033 0.004 0.000 0.000 0.238 SW 0.000 0.000 0.007 0.019 0.026 0.025 0.008 0.000 0.000 0.085 W 0.000 0.000 0.003 0.009 0.024 0.056 0.011 0.001 0.000 0.104 NW 0.000 0.000 0.005 0.005 0.013 0.056 0.008 0.000 0.000 0.087 W 0.000 0.000 0.007 0.015 0.015 0.061 0.007 0.002 0.000 0.107 NW 0.000 0.000 0.009 0.031 0.034 0.081 0.009 0.001 0.000 0.165 total 0.000 0.007 0.425 0.984 0.969 1.040 0.133 0.010 0.000 3.568 Hours Of Valid Stability Observations 125417 Hours Of Stability Class B 4466 Hours Of Valid Wind Direction-Wind Speed-Stability Class B 4384 Hours Of Valid Wind Direction-Wind Speed-Stability Observations 122869 orological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant ility Based On Delta-T Between 9.51 And 45.63 Meters Speed And Direction Measured At 9.72 Meter Level WBNP-63 n Wind Speed = 6.61

Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR Stability Class C (-1.7< Delta T<=-1.5 C/100 M),

Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 88 ind Wind Speed (MPH) ection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.000 0.001 0.037 0.094 0.118 0.168 0.009 0.000 0.000 0.427 NNE 0.000 0.001 0.094 0.214 0.238 0.300 0.022 0.000 0.000 0.868 NE 0.000 0.002 0.118 0.225 0.168 0.138 0.002 0.000 0.000 0.652 ENE 0.000 0.000 0.109 0.181 0.098 0.033 0.001 0.000 0.000 0.423 E 0.000 0.003 0.109 0.152 0.027 0.007 0.001 0.000 0.000 0.299 ESE 0.000 0.001 0.042 0.046 0.004 0.000 0.000 0.000 0.000 0.094 SE 0.000 0.000 0.049 0.058 0.011 0.002 0.003 0.000 0.000 0.122 SSE 0.000 0.001 0.088 0.123 0.037 0.013 0.004 0.000 0.000 0.266 S 0.000 0.001 0.106 0.242 0.122 0.081 0.020 0.002 0.000 0.573 SW 0.000 0.000 0.085 0.420 0.430 0.305 0.075 0.006 0.000 1.320 SW 0.000 0.001 0.046 0.181 0.120 0.046 0.009 0.000 0.000 0.403 SW 0.000 0.000 0.024 0.063 0.040 0.028 0.012 0.000 0.000 0.168 W 0.000 0.001 0.020 0.031 0.053 0.070 0.013 0.003 0.000 0.191 NW 0.000 0.000 0.012 0.020 0.037 0.120 0.016 0.000 0.000 0.205 NW 0.000 0.000 0.022 0.043 0.057 0.161 0.019 0.001 0.000 0.303 NW 0.000 0.000 0.024 0.066 0.092 0.137 0.011 0.000 0.000 0.330 ubtotal 0.000 0.011 0.986 2.160 1.651 1.609 0.216 0.011 0.000 6.644 l Hours Of Valid Stability Observations 125417 l Hours Of Stability Class C 8348 l Hours Of Valid Wind Direction-Wind Speed-Stability Class C 8164 l Hours Of Valid Wind Direction-Wind Speed-Stability Observations 122869 eorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant bility Based On Delta-T Between 9.51 And 45.63 Meters d Speed And Direction Measured At 9.72 Meter Level n Wind Speed = 6.20 WBNP-63 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR Stability Class D (-1.5< Delta T<=-0.5 C/100 M),

Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 88 ind Wind Speed (MPH) ction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.002 0.037 0.437 0.850 0.938 1.164 0.049 0.000 0.000 3.477 NE 0.002 0.037 0.544 1.219 1.335 1.464 0.061 0.000 0.000 4.663 NE 0.003 0.057 0.648 0.976 0.632 0.384 0.008 0.001 0.000 2.709 NE 0.003 0.092 0.814 0.597 0.178 0.059 0.002 0.000 0.000 1.745 E 0.003 0.125 0.619 0.295 0.079 0.020 0.000 0.000 0.000 1.140 SE 0.001 0.057 0.232 0.089 0.015 0.009 0.000 0.000 0.000 0.403 SE 0.002 0.069 0.365 0.173 0.031 0.028 0.009 0.000 0.000 0.677 SE 0.003 0.123 0.610 0.264 0.059 0.058 0.021 0.002 0.000 1.139 S 0.004 0.108 0.941 0.872 0.358 0.330 0.110 0.013 0.001 2.737 SW 0.005 0.095 1.161 1.878 1.141 1.244 0.300 0.028 0.000 5.851 SW 0.003 0.094 0.696 0.750 0.255 0.182 0.022 0.002 0.001 2.005 SW 0.002 0.071 0.478 0.347 0.182 0.136 0.039 0.001 0.000 1.255 W 0.002 0.081 0.429 0.353 0.387 0.439 0.055 0.003 0.000 1.751 NW 0.002 0.094 0.343 0.371 0.408 0.558 0.061 0.004 0.000 1.842 NW 0.002 0.072 0.354 0.409 0.544 0.794 0.079 0.000 0.000 2.252 NW 0.001 0.046 0.350 0.518 0.628 0.948 0.050 0.000 0.000 2.542 TOTAL 0.037 1.260 9.020 9.962 7.170 7.816 0.866 0.054 0.002 36.187 l Hours Of Valid Stability Observations 125417 l Hours Of Stability Class D 45215 l Hours Of Valid Wind Direction-Wind Speed-Stability Class D 44463 l Hours Of Valid Wind Direction-Wind Speed-Stability Observations 122869 eorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant bility Based On Delta-T Between 9.51 And 45.63 Meters d Speed And Direction Measured At 9.72 Meter Level n Wind Speed = 5.52 WBNP-63 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR Stability Class E (-0.5< Delta T<= 1.5 C/100 M),

Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 88 Wind Wind Speed (MPH) ection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.015 0.157 0.531 0.639 0.299 0.091 0.002 0.000 0.000 1.734 NNE 0.011 0.132 0.398 0.466 0.235 0.087 0.004 0.000 0.000 1.334 NE 0.013 0.139 0.471 0.239 0.098 0.038 0.000 0.000 0.000 0.999 ENE 0.027 0.243 1.015 0.337 0.049 0.011 0.001 0.000 0.000 1.683 E 0.018 0.290 0.522 0.101 0.021 0.013 0.002 0.000 0.000 0.966 ESE 0.006 0.135 0.147 0.032 0.009 0.002 0.001 0.000 0.000 0.332 SE 0.009 0.192 0.228 0.046 0.029 0.024 0.004 0.000 0.000 0.532 SSE 0.019 0.308 0.591 0.122 0.060 0.079 0.015 0.001 0.000 1.195 S 0.030 0.382 1.016 0.475 0.222 0.187 0.062 0.009 0.000 2.383 SW 0.039 0.434 1.389 1.145 0.771 0.811 0.165 0.021 0.000 4.776 SW 0.031 0.461 0.971 0.306 0.198 0.150 0.027 0.003 0.000 2.147 SW 0.031 0.605 0.824 0.186 0.108 0.081 0.014 0.001 0.000 1.850 W 0.029 0.662 0.698 0.229 0.109 0.073 0.011 0.000 0.000 1.811 NW 0.028 0.641 0.639 0.203 0.090 0.042 0.002 0.002 0.000 1.646 NW 0.032 0.719 0.753 0.255 0.122 0.058 0.002 0.000 0.000 1.940 NW 0.020 0.383 0.553 0.336 0.152 0.083 0.002 0.000 0.000 1.530 BTOTAL 0.360 5.882 10.746 5.116 2.573 1.832 0.314 0.037 0.000 26.859 l Hours Of Valid Stability Observations 125417 l Hours Of Stability Class E 33679 l Hours Of Valid Wind Direction-Wind Speed-Stability Class E 33002 l Hours Of Valid Wind Direction-Wind Speed-Stability Observations 122869 eorological Facility Located 0.8 K SSW Of Watts Bar Nuclear Plant bility Based On Delta-T Between 9.51 And 45.63 Meters d Speed And Direction Measured At 9.72 Meter Level n Wind Speed = 3.43 WBNP-63 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR Stability Class F ( 1.5< Delta T<= 4.0 C/100 M),

Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 88 Wind Wind Speed (MPH) ection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.027 0.274 0.269 0.032 0.008 0.001 0.000 0.000 0.000 0.610 NNE 0.022 0.215 0.238 0.033 0.001 0.001 0.000 0.000 0.000 0.511 NE 0.028 0.238 0.322 0.024 0.002 0.001 0.000 0.000 0.000 0.616 ENE 0.048 0.339 0.636 0.065 0.002 0.002 0.000 0.000 0.000 1.093 E 0.026 0.292 0.228 0.009 0.001 0.001 0.000 0.000 0.000 0.556 ESE 0.008 0.112 0.054 0.001 0.000 0.000 0.000 0.000 0.000 0.175 SE 0.013 0.168 0.100 0.004 0.001 0.000 0.000 0.000 0.000 0.287 SSE 0.025 0.281 0.226 0.020 0.003 0.002 0.000 0.000 0.000 0.558 S 0.032 0.323 0.326 0.043 0.006 0.005 0.000 0.000 0.000 0.734 SSW 0.039 0.350 0.443 0.192 0.073 0.015 0.000 0.000 0.000 1.112 SW 0.046 0.440 0.497 0.075 0.019 0.007 0.001 0.000 0.000 1.085 WSW 0.064 0.673 0.623 0.041 0.008 0.000 0.000 0.000 0.000 1.408 W 0.069 0.843 0.557 0.033 0.001 0.002 0.000 0.000 0.000 1.505 WNW 0.066 0.918 0.432 0.024 0.002 0.001 0.000 0.000 0.000 1.443 NW 0.104 1.257 0.856 0.045 0.005 0.002 0.001 0.000 0.000 2.270 NNW 0.056 0.680 0.457 0.034 0.005 0.000 0.000 0.000 0.000 1.231 BTOTAL 0.672 7.405 6.263 0.676 0.138 0.040 0.002 0.000 0.000 15.194 AL HOURS OF VALID STABILITY OBSERVATIONS 125417 AL HOURS OF STABILITY CLASS F 19142 AL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 18669 AL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 122869 TEOROLOGICAL FACILITY LOCATED 0.8 KM SSW OF WATTS BAR NUCLEAR PLANT BILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS D SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL AN WIND SPEED = 1.63 WBNP-63 TE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

TTS BAR Stability Class G (Delta T > 4.0 C/100 M),

Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 88 nd Wind Speed (MPH) ction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total 0.021 0.194 0.077 0.002 0.000 0.000 0.000 0.000 0.000 0.292 NE 0.022 0.194 0.101 0.002 0.000 0.000 0.000 0.000 0.000 0.320 E 0.032 0.255 0.168 0.001 0.000 0.000 0.000 0.000 0.000 0.455 E 0.057 0.384 0.363 0.009 0.000 0.001 0.000 0.000 0.000 0.814 0.030 0.276 0.117 0.001 0.000 0.000 0.000 0.000 0.000 0.424 E 0.009 0.096 0.027 0.000 0.000 0.000 0.000 0.000 0.000 0.132 E 0.017 0.163 0.058 0.000 0.000 0.000 0.000 0.000 0.000 0.237 E 0.021 0.190 0.081 0.002 0.000 0.000 0.000 0.000 0.000 0.293 0.021 0.188 0.090 0.005 0.002 0.000 0.000 0.000 0.000 0.306 W 0.024 0.201 0.110 0.013 0.002 0.000 0.000 0.000 0.000 0.349 W 0.029 0.248 0.126 0.007 0.000 0.000 0.000 0.000 0.000 0.409 W 0.050 0.402 0.256 0.006 0.000 0.000 0.000 0.000 0.000 0.714 0.056 0.438 0.291 0.006 0.000 0.000 0.000 0.000 0.000 0.790 W 0.046 0.420 0.181 0.004 0.000 0.000 0.000 0.000 0.000 0.651 W 0.066 0.556 0.308 0.011 0.001 0.000 0.000 0.000 0.000 0.942 W 0.037 0.326 0.153 0.003 0.000 0.000 0.000 0.000 0.000 0.519 OTAL 0.537 4.530 2.505 0.072 0.004 0.001 0.000 0.000 0.000 7.649 AL HOURS OF VALID STABILITY OBSERVATIONS 125417 AL HOURS OF STABILITY CLASS G 9683 AL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS G 9398 AL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 122869 TEOROLOGICAL FACILITY LOCATED 0.8 KM SSW OF WATTS BAR NUCLEAR PLANT BILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS D SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL AN WIND SPEED = 1.30 WBNP-63 TE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

TTS BAR Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 88 ND SPEED STABILITY CLASS (MPH) A B C D E F G CALM 0.001 0.000 0.000 0.037 0.360 0.672 0.537 0.6-1.4 0.009 0.007 0.011 1.260 5.882 7.405 4.530 1.5-3.4 0.262 0.425 0.986 9.020 10.746 6.263 2.505 3.5-5.4 0.747 0.984 2.160 9.962 5.116 0.676 0.072 5.5-7.4 1.006 0.969 1.651 7.170 2.573 0.138 0.004 7.5-12.4 1.618 1.040 1.609 7.816 1.832 0.040 0.001 2.5-18.4 0.244 0.133 0.216 0.866 0.314 0.002 0.000 8.5-24.4 0.011 0.010 0.011 0.054 0.037 0.000 0.000

>=24.5 0.000 0.000 0.000 0.002 0.000 0.000 0.000 TOTAL 3.898 3.568 6.644 36.187 26.859 15.194 7.649 AL HOURS OF VALID STABILITY OBSERVATIONS 125417 AL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 122869 AL HOURS OF OBSERVATIONS 131496 NT RECOVERABILITY PERCENTAGE 93.4 TEOROLOGICAL FACILITY LOCATED 0.8 KM SSW OF WATTS BAR NUCLEAR PLANT BILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS D SPEED AND DIRECTION MEASURED AT 9.72 METER LEVEL WBNP-63

TTS BAR Stability Class A (Delta T<=-1.9 C/100 M),

Watts Bar Nuclear Plant Jan 1, 77 - Dec 31, 88 Wind Wind Speed (Mph) irection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.000 0.000 0.008 0.016 0.024 0.075 0.022 0.001 0.000 0.146 NNE 0.000 0.001 0.009 0.041 0.083 0.149 0.024 0.000 0.000 0.308 NE 0.000 0.002 0.030 0.058 0.087 0.127 0.009 0.000 0.000 0.313 ENE 0.000 0.001 0.030 0.064 0.084 0.082 0.003 0.000 0.000 0.264 E 0.000 0.001 0.017 0.026 0.017 0.009 0.000 0.000 0.000 0.071 ESE 0.000 0.001 0.013 0.015 0.004 0.003 0.000 0.000 0.000 0.036 SE 0.000 0.002 0.013 0.024 0.002 0.001 0.002 0.000 0.000 0.044 SSE 0.000 0.001 0.018 0.037 0.016 0.016 0.004 0.002 0.000 0.095 S 0.000 0.000 0.030 0.067 0.055 0.090 0.028 0.003 0.000 0.273 SSW 0.000 0.000 0.023 0.117 0.186 0.625 0.329 0.054 0.009 1.343 SW 0.000 0.000 0.008 0.061 0.121 0.347 0.160 0.023 0.000 0.720 WSW 0.000 0.001 0.005 0.008 0.014 0.050 0.067 0.026 0.011 0.183 W 0.000 0.000 0.002 0.003 0.004 0.029 0.034 0.003 0.004 0.080 WNW 0.000 0.000 0.000 0.003 0.002 0.021 0.042 0.002 0.000 0.071 NW 0.000 0.001 0.001 0.002 0.002 0.017 0.012 0.003 0.000 0.038 NNW 0.000 0.002 0.003 0.011 0.018 0.048 0.016 0.001 0.000 0.100 UBTOTAL 0.001 0.013 0.212 0.553 0.719 1.691 0.753 0.118 0.024 4.084 AL HOURS OF VALID STABILITY OBSERVATIONS 101940 AL HOURS OF STABILITY CLASS A 4112 AL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 4046 AL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 99059 TEOROLOGICAL FACILITY LOCATED 0.8 KM SSW OF WATTS BAR NUCLEAR PLANT BILITY BASED ON DELTA-T BETWEEN 9.51 AND 45.63 METERS D SPEED AND DIRECTION MEASURED AT 46.36 METER LEVEL AN WIND SPEED = 9.40 WBNP-63 TE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS

TTS BAR Watts Bar Nuclear Plant Jan 1, 77 - Dec 31, 88 ind Wind Speed(MPH) ction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.000 0.000 0.025 0.030 0.046 0.106 0.023 0.000 0.000 0.231 NE 0.000 0.002 0.031 0.084 0.090 0.219 0.043 0.000 0.000 0.470 E 0.000 0.000 0.049 0.109 0.109 0.138 0.011 0.000 0.000 0.417 NE 0.000 0.002 0.081 0.094 0.099 0.079 0.001 0.000 0.000 0.356 E 0.000 0.001 0.028 0.043 0.023 0.008 0.001 0.000 0.000 0.105 SE 0.000 0.000 0.017 0.025 0.004 0.001 0.000 0.000 0.000 0.047 E 0.000 0.000 0.020 0.027 0.005 0.003 0.001 0.001 0.000 0.058 SE 0.000 0.000 0.031 0.056 0.009 0.010 0.001 0.000 0.000 0.107 S 0.000 0.000 0.029 0.076 0.051 0.048 0.011 0.004 0.001 0.221 SW 0.000 0.001 0.039 0.135 0.162 0.294 0.113 0.027 0.004 0.775 W 0.000 0.000 0.015 0.084 0.146 0.187 0.048 0.009 0.003 0.493 SW 0.000 0.000 0.002 0.012 0.016 0.046 0.017 0.010 0.002 0.106 W 0.000 0.000 0.005 0.001 0.006 0.045 0.032 0.009 0.000 0.099 NW 0.000 0.000 0.003 0.004 0.007 0.056 0.040 0.001 0.001 0.112 W 0.000 0.000 0.002 0.009 0.005 0.049 0.027 0.001 0.001 0.095 NW 0.000 0.000 0.007 0.018 0.023 0.067 0.039 0.002 0.001 0.158 TOTAL 0.001 0.006 0.387 0.808 0.803 1.357 0.411 0.065 0.013 3.849 l Hours Of Valid Stability Observations 101940 l Hours Of Stability Class B 3879 l Hours Of Valid Wind Direction-Wind Speed-Stability Class B 3813 l Hours Of Valid Wind Direction-Wind Speed-Stability Observations 99059 eorological Facility Located 0.8 Km Ssw Of Watts Bar Nuclear Plant bility Based On Delta-T Between 9.51 And 45.63 Meters d Speed And Direction Measured At 46.36 Meter Level n Wind Speed = 7.90 WBNP-63 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR 2.3-55 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 Plant Jan 1, 77 - Dec 31, 88 ind Wind Speed (MPH) ection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.000 0.000 0.032 0.099 0.080 0.197 0.043 0.001 0.000 0.452 NNE 0.000 0.000 0.057 0.134 0.185 0.339 0.065 0.000 0.000 0.779 NE 0.000 0.002 0.121 0.215 0.173 0.202 0.013 0.000 0.000 0.726 ENE 0.000 0.003 0.151 0.179 0.142 0.060 0.008 0.000 0.000 0.543 E 0.000 0.001 0.042 0.098 0.022 0.011 0.000 0.000 0.000 0.175 ESE 0.000 0.002 0.029 0.059 0.007 0.003 0.000 0.000 0.000 0.100 SE 0.000 0.001 0.039 0.045 0.008 0.002 0.004 0.001 0.000 0.101 SSE 0.000 0.001 0.054 0.083 0.032 0.018 0.006 0.000 0.000 0.194 S 0.000 0.000 0.059 0.133 0.067 0.066 0.024 0.011 0.001 0.360 SW 0.000 0.003 0.074 0.246 0.283 0.361 0.126 0.027 0.005 1.126 SW 0.000 0.001 0.037 0.162 0.209 0.231 0.042 0.015 0.002 0.700 SW 0.000 0.001 0.018 0.039 0.038 0.052 0.023 0.012 0.002 0.187 W 0.000 0.000 0.013 0.017 0.021 0.059 0.027 0.005 0.002 0.144 NW 0.000 0.000 0.004 0.012 0.023 0.113 0.080 0.008 0.000 0.240 NW 0.000 0.000 0.011 0.021 0.029 0.147 0.058 0.001 0.000 0.268 NW 0.000 0.002 0.022 0.037 0.045 0.137 0.047 0.000 0.000 0.292 BTOTAL 0.000 0.017 0.764 1.580 1.365 1.999 0.567 0.082 0.012 6.386 l Hours Of Valid Stability Observations 101940 l Hours Of Stability Class C 6506 l Hours Of Valid Wind Direction-wind Speed-stability Class C 6326 l Hours Of Valid Wind Direction-wind Speed-stability Observations 99059 eorological Facility Located 0.8 Km Ssw Of Watts Bar Nuclear Plant bility Based On Delta-t Between 9.51 And 45.63 Meters d Speed And Direction Measured At 46.36 Meter Level WBNP-63 n Wind Speed = 7.37 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR Watts Bar Nuclear Plant Jan 1, 77 - Dec 31, 88 Wind Wind Speed(MPH) irection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.002 0.040 0.284 0.476 0.614 1.793 0.380 0.011 0.000 3.600 NNE 0.003 0.060 0.408 0.861 1.195 1.906 0.283 0.007 0.000 4.723 NE 0.005 0.082 0.669 0.982 0.876 1.042 0.088 0.000 0.000 3.745 ENE 0.006 0.113 0.689 0.594 0.349 0.186 0.013 0.000 0.000 1.950 E 0.004 0.100 0.428 0.234 0.103 0.051 0.006 0.000 0.000 0.927 ESE 0.002 0.049 0.194 0.113 0.022 0.015 0.003 0.000 0.000 0.399 SE 0.002 0.048 0.223 0.156 0.043 0.039 0.010 0.005 0.000 0.528 SSE 0.003 0.085 0.386 0.278 0.067 0.078 0.048 0.009 0.000 0.953 S 0.005 0.077 0.586 0.564 0.295 0.310 0.148 0.052 0.008 2.045 SSW 0.006 0.074 0.800 1.421 1.094 1.436 0.769 0.158 0.020 5.779 SW 0.004 0.047 0.513 0.864 0.622 0.757 0.269 0.047 0.012 3.136 WSW 0.003 0.045 0.354 0.344 0.208 0.336 0.131 0.026 0.008 1.457 W 0.002 0.062 0.248 0.193 0.193 0.517 0.205 0.037 0.003 1.460 WNW 0.002 0.055 0.199 0.201 0.275 0.893 0.271 0.018 0.000 1.913 NW 0.002 0.043 0.236 0.234 0.363 0.988 0.304 0.020 0.001 2.193 NNW 0.002 0.040 0.231 0.311 0.384 1.132 0.346 0.013 0.000 2.459 UBTOTAL 0.055 1.021 6.448 7.828 6.703 11.479 3.274 0.406 0.052 37.265 l Hours Of Valid Stability Observations 101940 l Hours Of Stability Class D 37699 l Hours Of Valid Wind Direction-Wind Speed-Stability Class D 36914 l Hours Of Valid Wind Direction-Wind Speed-Stability Observations 99059 eorological Facility Located 0.8 Km Ssw Of Watts Bar Nuclear Plant bility Based On Delta-T Between 9.51 And 45.63 Meters d Speed And Direction Measured At 46.36 Meter Level n Wind Speed = 7.05 WBNP-63 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR Watts Bar Nuclear Plant Jan 1, 77 - Dec 31, 88 ind Wind Speed(Mph) ection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.020 0.146 0.350 0.268 0.418 0.641 0.024 0.000 0.000 1.867 NE 0.033 0.217 0.612 0.564 0.460 0.368 0.009 0.000 0.000 2.264 NE 0.047 0.313 0.871 0.545 0.288 0.131 0.004 0.000 0.000 2.199 NE 0.039 0.313 0.683 0.230 0.074 0.047 0.004 0.000 0.000 1.391 E 0.024 0.287 0.312 0.095 0.039 0.026 0.003 0.000 0.000 0.786 SE 0.012 0.153 0.142 0.058 0.020 0.008 0.000 0.001 0.000 0.394 SE 0.011 0.128 0.164 0.055 0.037 0.041 0.016 0.004 0.000 0.457 SE 0.024 0.209 0.394 0.155 0.071 0.128 0.060 0.007 0.000 1.047 S 0.041 0.272 0.773 0.529 0.311 0.344 0.126 0.032 0.007 2.436 SW 0.054 0.282 1.094 1.266 1.038 1.425 0.552 0.097 0.003 5.811 SW 0.029 0.189 0.560 0.514 0.448 0.723 0.244 0.032 0.004 2.744 SW 0.018 0.150 0.298 0.222 0.164 0.247 0.083 0.014 0.001 1.197 W 0.013 0.112 0.225 0.134 0.125 0.192 0.035 0.005 0.000 0.842 NW 0.011 0.120 0.164 0.128 0.125 0.147 0.017 0.000 0.000 0.713 NW 0.013 0.125 0.210 0.130 0.209 0.208 0.024 0.001 0.000 0.921 NW 0.012 0.115 0.197 0.157 0.169 0.218 0.020 0.000 0.000 0.889 TOTAL 0.401 3.131 7.049 5.051 3.996 4.897 1.223 0.194 0.015 25.956 l Hours Of Valid Stability Observations 101940 l Hours Of Stability Class E 26543 l Hours Of Valid Wind Direction-Wind Speed-Stability Class E 25712 l Hours Of Valid Wind Direction-Wind Speed-Stability Observations 99059 eorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant bility Based On Delta-T Between 9.51 And 45.63 Meters d Speed And Direction Measured At 46.36 Meter Level n Wind Speed = 5.24 WBNP-63 e: Totals And Subtotals Are Obtained From Unrounded Numbers

TTS BAR Watts Bar Nuclear Plant Jan 1, 77 - Dec 31, 88 Wind Wind Speed (MPH) irection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.036 0.203 0.345 0.149 0.092 0.038 0.001 0.000 0.000 0.865 NNE 0.067 0.297 0.715 0.387 0.149 0.034 0.000 0.000 0.000 1.649 NE 0.092 0.454 0.937 0.318 0.076 0.012 0.000 0.000 0.000 1.889 ENE 0.074 0.406 0.713 0.081 0.004 0.002 0.000 0.000 0.000 1.279 E 0.036 0.326 0.220 0.009 0.004 0.001 0.000 0.000 0.000 0.596 ESE 0.016 0.164 0.079 0.009 0.000 0.000 0.000 0.000 0.000 0.267 SE 0.018 0.162 0.114 0.023 0.011 0.003 0.000 0.000 0.000 0.331 SSE 0.034 0.206 0.303 0.071 0.014 0.014 0.000 0.000 0.000 0.641 S 0.058 0.269 0.613 0.267 0.090 0.047 0.002 0.001 0.000 1.346 SSW 0.068 0.229 0.802 0.701 0.462 0.352 0.032 0.000 0.000 2.646 SW 0.039 0.214 0.378 0.209 0.132 0.187 0.022 0.001 0.000 1.182 WSW 0.023 0.141 0.214 0.084 0.062 0.055 0.003 0.000 0.000 0.582 W 0.021 0.158 0.157 0.054 0.032 0.023 0.001 0.000 0.000 0.447 WNW 0.017 0.146 0.107 0.045 0.027 0.014 0.000 0.000 0.000 0.357 NW 0.018 0.134 0.139 0.058 0.035 0.019 0.001 0.000 0.000 0.405 NNW 0.022 0.156 0.170 0.075 0.051 0.013 0.001 0.000 0.000 0.488 UBTOTAL 0.638 3.665 6.005 2.538 1.243 0.816 0.064 0.002 0.000 14.970 l Hours Of Valid Stability Observations 101940 l Hours Of Stability Class F 15456 l Hours Of Valid Wind Direction-Wind Speed-Stability Class F 14829 l Hours Of Valid Wind Direction-Wind Speed-Stability Observations 99059 eorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant bility Based On Delta-T Between 9.51 And 45.63 Meters d Speed And Direction Measured At 46.36 Meter Level n Wind Speed = 3.02 WBNP-63

TTS BAR Bar Nuclear Plant Jan 1, 77 - Dec 31, 88 Wind Wind Speed (MPH) irection Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.014 0.116 0.202 0.084 0.019 0.011 0.000 0.000 0.000 0.446 NNE 0.026 0.166 0.403 0.187 0.075 0.010 0.000 0.000 0.000 0.865 NE 0.038 0.226 0.625 0.223 0.040 0.005 0.000 0.000 0.000 1.158 ENE 0.030 0.162 0.498 0.061 0.000 0.001 0.000 0.000 0.000 0.750 E 0.010 0.128 0.098 0.004 0.000 0.001 0.000 0.000 0.000 0.241 ESE 0.004 0.055 0.031 0.005 0.000 0.000 0.000 0.000 0.000 0.095 SE 0.005 0.043 0.058 0.006 0.003 0.001 0.000 0.000 0.000 0.116 SSE 0.013 0.087 0.197 0.039 0.007 0.003 0.000 0.000 0.000 0.346 S 0.020 0.101 0.351 0.185 0.042 0.008 0.000 0.000 0.000 0.708 SSW 0.020 0.080 0.375 0.405 0.224 0.091 0.003 0.000 0.000 1.197 SW 0.011 0.074 0.175 0.110 0.043 0.037 0.001 0.000 0.000 0.451 WSW 0.008 0.061 0.111 0.049 0.024 0.009 0.000 0.000 0.000 0.262 W 0.007 0.059 0.099 0.026 0.018 0.009 0.000 0.000 0.000 0.218 WNW 0.006 0.064 0.074 0.030 0.009 0.005 0.000 0.000 0.000 0.188 NW 0.007 0.069 0.085 0.044 0.013 0.001 0.000 0.000 0.000 0.219 NNW 0.007 0.069 0.094 0.038 0.019 0.001 0.000 0.000 0.000 0.228 UBTOTAL 0.226 1.557 3.474 1.497 0.538 0.194 0.004 0.000 0.000 7.489 l Hours Of Valid Stability Observations 101940 l Hours Of Stability Class G 7745 l Hours Of Valid Wind Direction-Wind Speed-Stability Class G 7419 l Hours Of Valid Wind Direction-Wind Speed-Stability Observations 99059 eorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant bility Based On Delta-T Between 9.51 And 45.63 Meters d Speed And Direction Measured At 46.36 Meter Level n Wind Speed = 2.87 e: Totals And Subtotals Are Obtained From Unrounded Numbers WBNP-63

TTS BAR Jan 1, 77 - Dec 31, 88 d Speed Stability Class MPH) A B C D E F G CALM 0.001 0.001 0.000 0.055 0.401 0.638 0.226

.6-1.4 0.013 0.006 0.017 1.021 3.131 3.665 1.557

.5-3.4 0.212 0.387 0.764 6.448 7.049 6.005 3.474

.5-5.4 0.553 0.808 1.580 7.828 5.051 2.538 1.497

.5-7.4 0.719 0.803 1.365 6.703 3.996 1.243 0.538 5-12.4 1.691 1.357 1.999 11.479 4.897 0.816 0.194

.5-18.4 0.753 0.411 0.567 3.274 1.223 0.064 0.004

.5-24.4 0.118 0.065 0.082 0.406 0.194 0.002 0.000

=24.5 0.024 0.013 0.012 0.052 0.015 0.000 0.000 OTAL 4.084 3.849 6.386 37.265 25.956 14.970 7.489 l Hours Of Valid Stability Observations 101940 l Hours Of Valid Wind Direction-Wind Speed-Stability Observations 99059 l Hours Of Observations 105192 t Recoverability Percentage 94.2 eorological Facility Located 0.8 KM SSW Of Watts Bar Nuclear Plant bility Based On t Between 9.51 And 45.63 Meters d Speed And Direction Measured At 46.36 Meter Level WBNP-65

Table 2.3-61 Calculated 1-hour Average Atmospheric Dispersion Factors (X/q) At inimum 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 0.5th Percentile 5th Percentile Direction X/Q Value (sec/m3) X/Q Value (sec/m3)

N 3.312E-4 3.396E-5 NNE 3.341E-4 4.596E-5 NE 3.954E-4 3.314E-5 ENE 5.060E-4 2.883E-5 E 5.293E-4 3.177E-5 ESE 5.321E-4 2.721E-5 SE 6.040E-4 5.996E-5 SSE 4.705E-4 2.622E-5 S 3.068E-4 2.662E-5 SSW 2.901E-4 2.806E-5 SW 3.441E-4 1.791E-5 WSW 4.394E-4 3.217E-5 W 3.704E-4 -**

WNW 1.322E-4 -**

NW 2.242E-4 -**

NNW 3.154E-4 -**

All Directions 1.217E-3 5.323E-4 Combined

  • 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.

8 METEOROLOGY

Table 2.3-61a Calculated 1-hour Average Atmospheric Dispersion Factors (X/q) At inimum 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 0.5th Percentile 5th Percentile Direction X/Q Value (sec/m3) X/Q Value (sec/m3)

N 3.674E-4 3.550E-5 NNE 3.808E-4 5.036E-5 NE 4.597E-4 3.990E-5 ENE 5.305E-4 3.181E-5 E 5.297E-4 2.989E-5 ESE 5.089E-4 2.572E-5 SE 6.069E-4 4.769E-5 SSE 4.645E-4 2.375E-5 S 3.452E-4 2.598E-5 SSW 3.171E-4 2.721E-5 SW 3.703E-4 2.376E-5 WSW 4.728E-4 3.286E-5 W 3.701E-4 -**

WNW 1.452E-4 -**

NW 2.357E-4 -**

NNW 3.239E-4 -**

All Directions 9.297E-3 5.263E-5 Combined

  • 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.

EOROLOGY 2.3-89

able 2.3-62 Calculated 1-hour Average And Annual Average Atmospheric Dispersion tors (X/q) At Low Population Zone Distance (4828 Meters) For Watts Bar Nuclear Plant Based on R.G. 1.145 and Meteorological Data for 1974 Through 1988*

Plume Sector 0.5th Percentile 5th Percentile Annual Average Direction x/Q Value (sec/m3) x/Q Value (sec/m3) x/Q Value (sec/m3)

N 7.665E-5 4.828E-6 7.054E-7 NNE 7.799E-5 8.040E-6 1.150E-6 NE 9.809E-5 4.720E-6 1.225E-6 ENE 1.298E-4 3.714E-6 1.282E-6 E 1.348E-4 4.333E-6 1.391E-6 ESE 1.331E-4 3.357E-6 1.533E-6 SE 1.445E-4 1.060E-5 1.467E-6 SSE 1.183E-4 3.148E-6 9.964E-7 S 7.146E-5 3.246E-6 7.454E-7 SSW 6.759E-5 3.542E-6 7.091E-7 SW 8.790E-5 1.467E-6 8.111E-7 WSW 1.206E-4 4.466E-6 9.701E-7 W 9.350E-5 -** 4.400E-7 WNW 2.284E-5 -** 2.335E-7 NW 4.944E-5 -** 2.507E-7 NNW 7.223E-5 -** 3.935E-7 All Directions 2.717E-4 1.352E-4 -

Combined

  • 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.

0 METEOROLOGY

ble 2.3-62a Calculated 1-hour Average And Annual Average Atmospheric Dispersion tors (X/q) At Low Population Zone Distance (4828 Meters) For Watts Bar Nuclear Plant Based on R.G. 1.145 and Meteorological Data for 1974 Through 1993*

Plume Sector 0.5th Percentile 5th Percentile Annual Average Direction X/Q Value (sec/m3) X/Q Value (sec/m3) X/Q Value (sec/m3)

N 0.798E-4 5.094E-6 0.842E-6 NNE 0.845E-4 8.854E-6 1.386E-6 NE 1.135E-4 5.827E-6 1.639E-6 ENE 1.338E-4 4.514E-6 1.561E-6 E 1.365E-4 4.128E-6 1.600E-6 ESE 1.305E-4 3.181E-6 1.655E-6 SE 1.411E-4 7.997E-6 1.526E-6 SSE 1.161E-4 2.853E-6 1.035E-6 S 0.772E-4 3.211E-6 0.881E-6 SSW 0.731E-4 3.444E-6 0.814E-6 SW 0.930E-4 2.451E-6 1.001E-6 WSW 1.239E-4 4.608E-6 1.212E-6 W 0.897E-4 -** 0.469E-6 WNW 0.265E-4 -** 0.263E-6 NW 0.502E-4 -** 0.272E-6 NNW 0.691E-4 -** 0.416E-6 All Directions 2.797E-4 1.349E-4 -

Combined

  • 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.

EOROLOGY 2.3-91

able 2.3-63 Values Of 5th Percentile Overall Site 8-hour, 16-hour, 3-day, And 26-day ospheric Dispersion Factors (X/q) At Low Population Zone Distance (4828 Meters) For Watts Bar Nuclear Plant Based on R.G. 1.145 Method of Logarithmic Interpolation Between Overall 5th Percentile 1-hour X/Q Assumed to Apply for 2-hour Period and Maximum Sector Annual Average X/Q (underscored in Table 2.3-62)*

5th Percentile Averaging Period X/Q Value (sec/m3) 8-hour 6.447E-5 16-hour 4.452E-5 3-day 1.993E-5 26-day 6.288E-6

  • 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.

2 METEOROLOGY

ble 2.3-63a VALUES OF 5TH PERCENTILE OVERALL SITE 8-HOUR, 16-HOUR, 3-DAY, D 26-DAY ATMOSPHERIC DISPERSION FACTORS (X/Q) AT LOW POPULATION ZONE DISTANCE (4828 METERS) FOR WATTS BAR NUCLEAR PLANT Based on RG 1.145 Method of Logarithmic Interpolation Between Overall 5th Percentile 1-hour X/Q Assumed to Apply for 2-hour Period and Maximum Sector Annual Average X/Q (from Table 2.3-62a)*

5th Percentile Averaging Period X/Q Value (sec/m3) 8-hour 6.516E-5 16-hour 4.529E-5 3-day 2.057E-5 26-day 6.621E-6

  • 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.

EOROLOGY 2.3-93

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 Plant Based 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/m3) lume Sector 8-hour 16-hour 3-day 26-day N 3.531E-5 2.396E-5 1.034E-5 3.090E-6 NNE 3.884E-5 2.741E-5 1.286E-5 4.342E-6 NE 4.752E-5 3.308E-5 1.507E-5 4.874E-6 ENE 6.049E-5 4.130E-5 1.804E-5 5.492E-6 E 6.328E-5 4.336E-5 1.909E-5 5.877E-6 ESE 6.363E-5 4.399E-5 1.975E-5 6.257E-6 SE 6.765E-5 4.629E-5 2.032E-5 6.230E-6 SSE 5.370E-5 3.618E-5 1.536E-5 4.488E-6 S 3.361E-5 2.305E-5 1.017E-5 3.139E-6 SSW 3.182E-5 2.183E-5 9.639E-6 2.980E-6 SW 4.051E-5 2.750E-5 1.187E-5 3.550E-6 WSW 5.433E-5 3.647E-5 1.535E-5 4.433E-6 W 3.855E-5 2.475E-5 9.465E-6 2.381E-6 WNW 1.071E-5 7.329E-6 3.221E-6 9.895E-7 NW 2.064E-5 1.333E-5 5.167E-6 1.325E-6 NNW 3.051E-5 1.983E-S 7.784E-6 2.033E-6

  • 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.

4 METEOROLOGY

Table 2.3-64a 0.5th Percentile Sector Values Of 8-hour, 16-hour, 3-day, And 26-day mospheric Dispersion Factors (X/q) At Low Population Zone Outer Boundary Distance (4828 Meters) For Watts Bar Nuclear Plant Based 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/m3)----------

lume Sector 8-hour 16-hour 3-day 26-day N 3.760E-5 2.581E-5 1.141E-5 3.534E-6 NNE 4.281E-5 3.048E-5 1.458E-5 5.060E-6 NE 5.631E-5 3.967E-5 1.855E-5 6.228E-6 ENE 6.412E-5 4.438E-5 1.997E-5 6.347E-6 E 6.545E-5 4.532E-5 2.041E-5 6.494E-6 ESE 6.340E-5 4.418E-5 2.018E-5 6.553E-6 SE 6.677E-5 4.592E-5 2.039E-5 6.353E-6 SSE 5.319E-5 3.601E-5 1.544E-5 4.579E-6 S 3.683E-5 2.545E-5 1.141E-5 3.606E-6 SSW 3.475E-5 2.396E-5 1.070E-5 3.359E-6 SW 4.397E-5 3.023E-5 1.341E-5 4.174E-6 WSW 5.765E-5 3.933E-5 1.715E-5 5.208E-6 W 3.763E-5 2.438E-5 0.950E-5 2.458E-6 WNW 1.234E-5 0.843E-5 0.369E-5 1.124E-6 NW 2.116E-5 1.375E-5 0.539E-5 1.406E-6 NNW 2.969E-5 1.946E-5 0.777E-5 2.084E-6

  • 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.

EOROLOGY 2.3-95

Table 2.3-65 Deleted By Amendment 63 6 METEOROLOGY

ble 2.3-66 Atmospheric Dispersion Factors (X/q), Sec/m3, For Design Basis Accident Analyses Based On Onsite Meteorological Data For Watts Bar Nuclear Planta (Sheet 1 of 1)

Regulatory Guide 1.4 Results in original FSAR (5th percentile values) for July 1973 Through June 1975 Data.b Minimum Distance to Period Exclusion Boundary Low Population Zone (hours) (1100 m)c (4828 m) 0-2 0.692E-3d 0.160E-3d 2-8 - 0.844E-4d 8-24 - 0.854E-5 24-96 - 0.455E-5 96-720 - 0.198E-5 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 Datae.

Period (1100 m)c (4828 m) 0-2 0.604E-3 0.145E-3 2-8 - 0.677E-4 8-24 - 0.463E-4 24-96 - 0.203E-4 96-720 - 0.623E-5 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.

EOROLOGY 2.3-97

ble 2.3-66a Atmospheric Dispersion Factors (X/q), Sec/m3, For Design Basis Accident Analyses Based On Onsite Meteorological Data For Watts Bar Nuclear Plant1 Regulatory Guide 1.4 Results in original FSAR (5th percentile values) for July 1973 Through June 1975 Data.2 Minimum Distance to Period Exclusion Boundary Low Population Zone (hours) (1100 m)3 (4828 m) 0-2 0.692E-3 0.160E-34 2-8 - 0.844E-44 8-24 - 0.854E-5 24-96 - 0.455E-5 96-720 - 0.198E-5 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 Data5.

Minimum Distance to Period Exclusion Boundary Low Population Zone (hours) (1100 m)3 (4828 m) 0-2 0.607E-34 0.141E-3 2-8 - 0.668E-4 8-24 - 0.459E-4 24-96 - 0.204E-4 96-720 - 0.635E-5

1. 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.

8 METEOROLOGY

ble 2.3-67 Dispersion Meteorology - Onsite 10-meter Wind Data - 5th Percentile Values Inverse Wind Speed (1/u) Distributions For Post-loca Control Bay Dose Calculations For Watts Bar Nuclear Plant July 1973 through June 1975 Wind Speed and Direction Data Plume Sectors Averaging Periods (degrees) 1-hour 8-hour 16-hour 3-day 26-day 89.75-157.25 1.59 0.834 0.670 0.447 0.348 132.25-199.75 1.61 0.864 0.688 0.496 0.361 154.75-222.25 1.44 0.743 0.598 0.441 0.300 192.25-259.75 1.33 0.719 0.601 0.437 0.302 January 1974 through December 1988 Wind Speed and Direction Data Plume Sectors Averaging Periods (degrees) 1-hour 8-hour 16-hour 3-day 26-day 89.75-157.25 1.82 1.04 0.852 0.593 0.463 132.25-199.75 1.27 0.760 0.626 0.440 0.316 154.75-222.25 0.866 0.574 0.497 0.360 0.264 192.25-259.75 1.04 0.653 0.576 0.416 0.266 OTE: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.

EOROLOGY 2.3-99

le 2.3-67a Dispersion Meteorology - Onsite 10-meter Wind Data - 5th Percentile Values Inverse Wind Speed (1/u) Distributions For Post-loca Control Bay Dose Calculations For Watts Bar Nuclear Plant July 1973 through June 1975 Wind Speed and Direction Data Plume Sectors Averaging Periods (degrees) 1-hour 8-hour 16-hour 3-day 26-day 89.75-157.25 1.59 0.834 0.670 0.447 0.348 132.25-199.75 1.61 0.864 0.688 0.496 0.361 154.75-222.25 1.44 0.743 0.598 0.441 0.300 192.25-259.75 1.33 0.719 0.601 0.437 0.302 January 1974 through December 1993 Wind Speed and Direction Data Plume Sectors Averaging Periods (degrees) 1-hour 8-hour 16-hour 3-day 26-day 89.75-157.25 1.97 1.04 0.862 0.607 0.456 132.25-199.75 1.29 0.784 0.626 0.434 0.312 154.75-222.25 0.891 0.606 0.516 0.368 0.255 192.25-259.75 1.10 0.713 0.610 0.435 0.300 OTE: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.

l Hours of Valid Wind Observations 126806 l Hours of Observations 131496 overability Percentage 96.4 eorological Facility Located 0.8 Km Ssw Of Watts Bar Nuclear Plant d Speed And Direction Measured At 9.72 Meter Level n Wind Speed = 4.21 e: Totals And Subtotals Are Obtained From Unrounded Numbers 00 METEOROLOGY

WATTS BAR WBNP-89 Figure 2.3-1 Normal Sea Level Pressure Distribution Over North America and The North Atlantic Ocean METEOROLOGY 2.3-101

WATTS BAR WBNP-89 Figure 2.3-2 Total Number of Forecast-Days of High Meteorological Potential For Air Pollution in a 5 Year Period METEOROLOGY 2.3-102

WATTS BAR METEOROLOGY Figure 2.3-3 Climatological Data Sources in Area Around Watts Bar Site WBNP-89 2.3-103

WATTS BAR METEOROLOGY WBNP-89 Figure 2.3-4 Wind Speed at 9.72 Meters All Stability classes, Watts Bar Nuclear Plant, January 1, 1974 -December 31, 1993 2.3-104

WATTS BAR METEOROLOGY WBNP-89 Figure 2.3-5 Wind Speed at 46.36 Meters All Stability Classes, Watts Bar Nuclear Plant, January 1, 1977 -December 31, 1993 2.3-105

WATTS BAR METEOROLOGY Figure 2.3-6a Percent Occurrences Of Pasquill Stability Classes A, B, C, And D By Time Of Day, Watts Bar Nuclear Plant, 1974-1993 WBNP-89 2.3-106

WATTS BAR METEOROLOGY Figure 2.3-6b Percent Occurrences Of Pasquill Stability Classes E, F, and G By Time of Day, Watts Bar Nuclear Plant, 1974-1993 WBNP-89 2.3-107

WATTS BAR METEOROLOGY WBNP-89 Figure 2.3-7 Wind Speed at 9.72 Meters for Stability Class A, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993 2.3-108

WATTS BAR METEOROLOGY WBNP-89 Figure 2.3-8 Wind Speed at 9.72 Meters for Stability Class B, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993 2.3-109

WATTS BAR METEOROLOGY WBNP-89 Figure 2.3-9 Wind Speed at 9.72 Meters for Stability Class C, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993 2.3-110

WATTS BAR METEOROLOGY Figure 2.3-10 Wind Speed at 9.72 Meters for Stability Class D, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993 WBNP-89 2.3-111

WATTS BAR METEOROLOGY Figure 2.3-11 Wind Speed at 9.72 Meters for Stability Class E, Watts Bar Nuclear Plant, January 1, 1974 -December 31, 1993 WBNP-89 2.3-112

WATTS BAR METEOROLOGY Figure 2.3-12 Wind Speed at 9.72 Meters for Stability Class F, Watts Bar Nuclear Plant, January 1, 1974 -December 31, 1993 WBNP-89 2.3-113

WATTS BAR METEOROLOGY WBNP-89 Figure 2.3-13 Wind Speed at 9.72 Meters for Stability Class G, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993 2.3-114

WATTS BAR METEOROLOGY Figure 2.3-14 Topography Within 10 Mile Radius - N WBNP-89 2.3-115

WATTS BAR METEOROLOGY Figure 2.3-15 Topography Within 10 Mile Radius - NNE WBNP-89 2.3-116

WATTS BAR METEOROLOGY Figure 2.3-16 Topography Within 10 Mile Radius - NE WBNP-89 2.3-117

WATTS BAR METEOROLOGY Figure 2.3-17 Topography Within 10 Mile Radius - ENE WBNP-89 2.3-118

WATTS BAR METEOROLOGY Figure 2.3-18 Topography Within 10 Mile Radius - E WBNP-89 2.3-119

WATTS BAR METEOROLOGY Figure 2.3-19 Topography Within 10 Mile Radius - ESE WBNP-89 2.3-120

WATTS BAR METEOROLOGY Figure 2.3-20 Topography Within 10 Mile Radius - SE WBNP-89 2.3-121

WATTS BAR METEOROLOGY Figure 2.3-21 Topography Within 10 Mile Radius - SSE WBNP-89 2.3-122

WATTS BAR METEOROLOGY Figure 2.3-22 Topography Within 10 Mile Radius - S WBNP-89 2.3-123

WATTS BAR METEOROLOGY Figure 2.3-23 Topography Within 10 Mile Radius - SSW WBNP-89 2.3-124

WATTS BAR METEOROLOGY Figure 2.3-24 Topography Within 10 Mile Radius - SW WBNP-89 2.3-125

WATTS BAR METEOROLOGY Figure 2.3-25 Topography Within 10 Mile Radius - WSW WBNP-89 2.3-126

WATTS BAR WBNP-89 Figure 2.3-26 Topography Within 10 Mile Radius - W METEOROLOGY 2.3-127

WATTS BAR WBNP-89 Figure 2.3-27 Topography Within 10 Mile Radius - WNW METEOROLOGY 2.3-128

WATTS BAR WBNP-89 Figure 2.3-28 Topography Within 10 Mile Radius - NW METEOROLOGY 2.3-129

WATTS BAR WBNP-89 Figure 2.3-29 Topography Within 10 Mile Radius Watts Bar FSAR Section 2.0 Site Characteristics METEOROLOGY 2.3-130

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