Latest revision as of 18:39, 10 March 2020

Text

Amendment 102 to Final Safety Analysis Report (Fsar), Section, 2 a, Redacted, Site Characteristics
	ML11221A235
Person / Time
Site:	Watts Bar
Issue date:	12/17/2010
From:	; Tennessee Valley Authority
To:	; Office of Nuclear Reactor Regulation
References
	Download: ML11221A235 (250)
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WATTS BAR TABLE OF CONTENTS Section Title Page 2.0 SITE CHARACTERISTICS 2.1 GEOGRAPHY AND DEMOGRAPHY 2.1-1 2.1.1 SITE LOCATION AND DESCRIPTION 2.1-1 2.1.1.1 SPECIFICATION OF LOCATION 2.1-1 2.1.1.2 SITE AREA MAP 2.1-1 2.1.1.3 BOUNDARIES FOR ESTABLISHING EFFLUENT LIMITS 2.1-2 2.1.2 EXCLUSION AREA AUTHORITY AND CONTROL 2.1-2 2.1.2.1 AUTHORITY 2.1-2 2.1.2.2 CONTROL OF ACTIVITIES UNRELATED TO PLANT OPERATION 2.1-2 2.1.2.3 ARRANGEMENTS FOR TRAFFIC CONTROL 2.1-2 2.1.2.4 ABANDONMENT OR RELOCATION OF ROADS 2.1-2 2.1.3 POPULATION DISTRIBUTION 2.1-2 2.1.3.1 POPULATION WITHIN 10 MILES 2.1-3 2.1.3.2 POPULATION BETWEEN 10 AND 50 MILES 2.1-3 2.1.3.3 TRANSIENT POPULATION 2.1-4 2.1.3.4 LOW POPULATION ZONE 2.1-4 2.1.3.5 POPULATION CENTER 2.1-4 2.1.3.6 POPULATION DENSITY 2.1-4 2.2 NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES 2.2-1 2.2.1 LOCATION AND ROUTE 2.2-1 2.

2.2 DESCRIPTION

S 2.2-1 2.2.

2.1 DESCRIPTION

OF FACILITIES 2.2-1 2.2.

2.2 DESCRIPTION

OF PRODUCTS AND MATERIALS 2.2-1 2.2.2.3 PIPELINES 2.2-1 2.2.2.4 WATERWAYS 2.2-1 2.2.2.5 AIRPORTS 2.2-2 2.2.2.6 PROJECTIONS OF INDUSTRIAL GROWTH 2.2-2 2.2.3 EVALUATION OF POTENTIAL ACCIDENTS 2.2-2 2.2.

3.1 REFERENCES

2.2-3 2.3 METEOROLOGY 2.3-1 2.3.1 REGIONAL CLIMATE 2.3-1 2.3.1.1 DATA SOURCES 2.3-1 Table of Contents 2-i

WATTS BAR TABLE OF CONTENTS Section Title Page 2.3.1.2 GENERAL CLIMATE 2.3-1 2.3.1.3 SEVERE WEATHER 2.3-2 2.3.2 LOCAL METEOROLOGY 2.3-6 2.3.2.1 DATA SOURCES 2.3-6 2.3.2.2 NORMAL AND EXTREME VALUES OF METEOROLOGICAL PARAMETERS 2.3-6 2.3.2.3 POTENTIAL INFLUENCE OF THE PLANT AND ITS FACILITIES ON LOCAL METEOROLOGY 2.3-9 2.3.2.4 LOCAL METEOROLOGICAL CONDITIONS FOR DESIGN AND OPERATING BASES 2.3-9 2.3.3 ONSITE METEOROLOGICAL MEASUREMENTS PROGRAM 2.3-9 2.3.3.1 PREOPERATIONAL PROGRAM 2.3-9 2.3.3.2 OPERATIONAL METEOROLOGICAL PROGRAM 2.3-12 2.3.3.3 ONSITE DATA SUMMARIES OF PARAMETERS FOR DISPERSION METEOROLOGY 2.3-13 2.3.4 SHORT-TERM (ACCIDENT) DIFFUSION ESTIMATES 2.3-14 2.3.4.1 OBJECTIVE 2.3-14 2.3.4.2 CALCULATION RESULTS 2.3-16 2.3.5 LONG-TERM (ROUTINE) DIFFUSION ESTIMATES 2.3-17 2.4 HYDROLOGIC ENGINEERING 2.4-1 2.4.1 HYDROLOGICAL DESCRIPTION 2.4-1 2.4.1.1 SITES AND FACILITIES 2.4-1 2.4.1.2 HYDROSPHERE 2.4-2 2.4.2 FLOODS 2.4-6 2.4.2.1 FLOOD HISTORY 2.4-6 2.4.2.2 FLOOD DESIGN CONSIDERATIONS 2.4-6 2.4.2.3 EFFECTS OF LOCAL INTENSE PRECIPITATION 2.4-8 2.4.3 PROBABLE MAXIMUM FLOOD (PMF) ON STREAMS AND RIVERS 2.4-11 2.4.3.1 PROBABLE MAXIMUM PRECIPITATION (PMP) 2.4-12 2.4.3.2 PRECIPITATION LOSSES 2.4-13 2.4.3.3 RUNOFF AND STREAM COURSE MODEL 2.4-13 2.4.3.4 PROBABLE MAXIMUM FLOOD FLOW 2.4-16 2.4.3.5 WATER LEVEL DETERMINATIONS 2.4-17 2.4.3.6 COINCIDENT WIND WAVE ACTIVITY 2.4-18 2.4.4 POTENTIAL DAM FAILURES, SEISMICALLY INDUCED 2.4-20 2-ii Table of Contents

WATTS BAR TABLE OF CONTENTS Section Title Page 2.4.4.1 DAM FAILURE PERMUTATIONS 2.4-21 2.4.4.2 UNSTEADY FLOW ANALYSIS OF POTENTIAL DAM FAILURES 2.4-32 2.4.4.3 WATER LEVEL AT PLANTSITE 2.4-32 2.4.5 PROBABLE MAXIMUM SURGE AND SEICHE FLOODING 2.4-32 2.4.6 PROBABLE MAXIMUM TSUNAMI FLOODING 2.4-32 2.4.7 ICE EFFECTS 2.4-32 2.4.8 COOLING WATER CANALS AND RESERVOIRS 2.4-34 2.4.9 CHANNEL DIVERSIONS 2.4-34 2.4.10 FLOODING PROTECTION REQUIREMENTS 2.4-34 2.4.11 LOW WATER CONSIDERATIONS 2.4-35 2.4.11.1 LOW FLOW IN RIVERS AND STREAMS 2.4-35 2.4.11.2 LOW WATER RESULTING FROM SURGES, SEICHES, OR TSUNAMI 2.4-35 2.4.11.3 HISTORICAL LOW WATER 2.4-35 2.4.11.4 FUTURE CONTROL 2.4-36 2.4.11.5 PLANT REQUIREMENTS 2.4-36 2.4.12 DISPERSION, DILUTION, AND TRAVEL TIMES OF ACCIDENTAL RELEASES OF LIQUID EFFLUENTS 2.4-37 2.4.12.1 RADIOACTIVE LIQUID WASTES 2.4-37 2.4.12.2 ACCIDENTAL SLUG RELEASES TO SURFACE WATER 2.4-37 2.4.12.3 EFFECTS ON GROUND WATER 2.4-40 2.4.13 GROUNDWATER 2.4-40 2.4.

13.1 DESCRIPTION

AND ON-SITE USE 2.4-40 2.4.13.2 SOURCES 2.4-41 2.4.13.3 ACCIDENT EFFECTS 2.4-42 2.4.13.4 MONITORING AND SAFEGUARD REQUIREMENTS 2.4-43 2.4.13.5 DESIGN BASIS FOR SUBSURFACE HYDROSTATIC LOADING 2.4-43 2.4.14 FLOODING PROTECTION REQUIREMENTS 2.4-44 2.4.

14.1 INTRODUCTION

2.4-44 2.4.14.2 PLANT OPERATION DURING FLOODS ABOVE GRADE 2.4-45 2.4.14.3 WARNING SCHEME 2.4-47 2.4.14.4 PREPARATION FOR FLOOD MODE 2.4-47 2.4.14.5 EQUIPMENT 2.4-49 2.4.14.6 SUPPLIES 2.4-50 2.4.14.7 PLANT RECOVERY 2.4-50 Table of Contents 2-iii

WATTS BAR TABLE OF CONTENTS Section Title Page 2.4.14.8 WARNING PLAN 2.4-50 2.4.14.9 BASIS FOR FLOOD PROTECTION PLAN IN RAINFALL FLOODS 2.4-51 2.4.14.10 BASIS FOR FLOOD PROTECTION PLAN IN SEISMIC-CAUSED DAM FAILURES 2.4-56 2.4.14.11 SPECIAL CONDITION ALLOWANCE 2.4-57 2.5 GEOLOGY, SEISMOLOGY, AND GEOTECHNICAL ENGINEERING

SUMMARY

OF FOUNDATION CONDITIONS 2.5-1 2.5.1 BASIC GEOLOGY AND SEISMIC INFORMATION 2.5-2 2.5.1.1 REGIONAL GEOLOGY 2.5-3 2.5.1.2 SITE GEOLOGY 2.5-26 2.5.2 VIBRATORY GROUND MOTION 2.5-34 2.5.2.1 SEISMICITY 2.5-34 2.5.2.2 GEOLOGIC STRUCTURES AND TECTONIC ACTIVITY 2.5-41 2.5.2.3 CORRELATION OF EARTHQUAKE ACTIVITY WITH GEOLOGIC STRUCTURES TO TECTONIC PROVINCES 2.5-42 2.5.2.4 MAXIMUM EARTHQUAKE POTENTIAL 2.5-42 2.5.2.5 SEISMIC WAVE TRANSMISSION CHARACTERISTICS OF THE SITE 2.5-44 2.5.2.6 SAFE SHUTDOWN EARTHQUAKE 2.5-45 2.5.2.7 OPERATING BASIS EARTHQUAKE 2.5-45 2.5.3 SURFACE FAULTING 2.5-45 2.5.3.1 GEOLOGIC CONDITIONS OF THE SITE 2.5-45 2.5.3.2 EVIDENCE OF FAULT OFFSET 2.5-45 2.5.3.3 EARTHQUAKES ASSOCIATED WITH CAPABLE FAULTS 2.5-54 2.5.3.4 INVESTIGATIONS OF CAPABLE FAULTS 2.5-54 2.5.3.5 CORRELATION OF EPICENTERS WITH CAPABLE FAULTS 2.5-56 2.5.

3.6 DESCRIPTION

OF CAPABLE FAULTS 2.5-56 2.5.3.7 ZONE REQUIRING DETAILED FAULTING INVESTIGATION 2.5-56 2.5.3.8 RESULTS OF FAULTING INVESTIGATIONS 2.5-56 2.5.4 STABILITY OF SUBSURFACE MATERIALS 2.5-56 2.5.4.1 GEOLOGIC FEATURES 2.5-56 2.5.4.2 PROPERTIES OF SUBSURFACE MATERIALS 2.5-57 2.5.4.3 EXPLORATION 2.5-89 2.5.4.4 GEOPHYSICAL SURVEYS 2.5-90 2.5.4.5 EXCAVATIONS AND BACKFILL 2.5-93 2-iv Table of Contents

WATTS BAR TABLE OF CONTENTS Section Title Page 2.5.4.6 GROUNDWATER CONDITIONS 2.5-101 2.5.4.7 RESPONSE OF SOIL AND ROCK TO DYNAMIC LOADING 2.5-102 2.5.4.8 LIQUEFACTION POTENTIAL 2.5-103 2.5.4.9 EARTHQUAKE DESIGN BASIS 2.5-113 2.5.4.10 STATIC ANALYSIS 2.5-113 2.5.4.11 SAFETY-RELATED CRITERIA FOR FOUNDATIONS 2.5-115 2.5.4.12 TECHNIQUES TO IMPROVE SUBSURFACE CONDITIONS 2.5-115 2.5.4.13 CONSTRUCTION NOTES 2.5-118 2.5.5 STABILITY OF SLOPES 2.5-118 2.5.5.1 SLOPE CHARACTERISTICS 2.5-118 2.5.5.2 DESIGN CRITERIA AND ANALYSIS 2.5-120 2.5.5.3 LOGS OF BORINGS 2.5-127 2.5.5.4 COMPACTION SPECIFICATIONS 2.5-127 2.5.6 EMBANKMENTS 2.5-127 Table of Contents 2-v

WATTS BAR TABLE OF CONTENTS Section Title Page THIS PAGE INTENTIONALLY BLANK 2-vi Table of Contents

WATTS BAR LIST OF TABLES Section Title TABLE 2.1-1 WATTS BAR 2000 POPULATION DISTRIBUTION WITHIN 10 MILES OF THE SITE (SHEET 1 OF 1)

TABLE 2.1-2 WATTS BAR 2010 POPULATION DISTRIBUTION WITHIN 10 MILES OF THE SITE TABLE 2.1-3 WATTS BAR 2020 POPULATION DISTRIBUTION WITHIN 10 MILES OF THE SITE TABLE 2.1-4 WATTS BAR 2030 POPULATION DISTRIBUTION WITHIN 10 MILES OF THE SITE TABLE 2.1-5 WATTS BAR 2040 POPULATION DISTRIBUTION WITHIN 10 MILES OF THE SITE TABLE 2.1-6 WATTS BAR 2050 POPULATION DISTRIBUTION WITHIN 10 MILES OF THE SITE TABLE 2.1-7 WATTS BAR 2060 POPULATION DISTRIBUTION WITHIN 10 MILES OF THE SITE TABLE 2.1-8 WATTS BAR 2000 POPULATION DISTRIBUTION WITHIN 50 MILES OF THE SITE TABLE 2.1-9 WATTS BAR 2010 POPULATION DISTRIBUTION WITHIN 50 MILES OF THE SITE TABLE 2.1-10 WATTS BAR 2020 POPULATION DISTRIBUTION WITHIN 50 MILES OF THE SITE TABLE 2.1-11 WATTS BAR 2030 POPULATION DISTRIBUTION WITHIN 50 MILES OF THE SITE TABLE 2.1-12 WATTS BAR 2040 POPULATION DISTRIBUTION WITHIN 50 MILES OF THE SITE TABLE 2.1-13 WATTS BAR 2050 POPULATION DISTRIBUTION WITHIN 50 MILES OF THE SITE List of Tables 2-vii

WATTS BAR LIST OF TABLES Section Title TABLE 2.1-14 WATTS BAR 2060 POPULATION DISTRIBUTION WITHIN 50 MILES OF THE SITE TABLE 2.1-15 WATTS BAR 2009 ESTIMATED PEAK RECREATION VISITATION WITHIN 10 MILES OF THE SITE TABLE 2.1-16 WATTS BAR 2010 ESTIMATED PEAK RECREATION VISITATION WITHIN 10 MILES OF THE SITE TABLE 2.1-17 WATTS BAR 2020 ESTIMATED PEAK RECREATION VISITATION WITHIN 10 MILES OF THE SITE TABLE 2.1-18 WATTS BAR 2030 ESTIMATED PEAK RECREATION VISITATION WITHIN 10 MILES OF THE SITE TABLE 2.1-19 WATTS BAR 2040 ESTIMATED PEAK RECREATION VISITATION WITHIN 10 MILES OF THE SITE TABLE 2.1-20 WATTS BAR 2050 ESTIMATED PEAK RECREATION VISITATION WITHIN 10 MILES OF THE SITE TABLE 2.1-21 WATTS BAR 2060 ESTIMATED PEAK RECREATION VISITATION WITHIN 10 MILES OF THE SITE TABLE 2.1-22 SCHOOL ENROLLMENTS WITHIN 10 MILES OF WATTS BAR NUCLEAR PLANT TABLE 2.2-1 WATERBORNE HAZARDOUS MATERIAL TRAFFIC (TONS)

TABLE 2.2-2 DELETED BY AMENDMENT 94 TABLE 2.3-1 THUNDERSTORM DAY FREQUENCIES TABLE 2.3-1A EXTREME WIND SPEEDS TABLE 2.3-1B STORM EVENTS FOR RHEA AND SURRONDING COUNTIES TABLE 2.3-2 TEMPERATURE DATA DAYTON AND DECATUR, TENNESSEE COOPERTIVE OBSERVER DATAA (DATA IN °F) 2-viii List of Tables

WATTS BAR LIST OF TABLES Section Title TABLE 2.3-3 TEMPERATURE DATA CHATTANOOGA, TENNESSEE NATIONAL WEATHER SERVICEA (DATA IN °F)

TABLE 2.3-4 PRECIPITATION DATA WATTS BAR NUCLEAR PLANT AND WATTS BAR DAM PRECIPITATION DATA (INCHES)

(DATA IN INCHES)

TABLE 2.3-5 SNOWFALL DATA (INCHES)

DAYTON, TENNESSEE (DATA IN INCHES)

TABLE 2.3-6 SNOWFALL DATA CHATTANOOGA AND KNOXVILLE, TENNESSEE NWS (DATA IN INCHES)

TABLE 2.3-7 AVERAGE RELATIVE HUMIDITY DATA (PERCENT) -

SELECTED HOURS CHATTANOOGA, TENNESSEE*

TABLE 2.3-8 RELATIVE HUMIDITY (PERCENT)

NATIONAL WEATHER SERVICE STATION CHATTANOOGA, TENNESSEE*

TABLE 2.3-9 ABSOLUTE HUMIDITY CHATTANOOGA, TENNESSEE NWS (DATA IN GM/M3)

JANUARY 1965-DECEMBER 1971*

TABLE 2.3-10 RELATIVE HUMIDITY WATTS BAR NUCLEAR PLANT METEOROLOGICAL FACILITY (SHEET 1 OF 2)

(DATA IN PERCENT)

JULY 1, 1973 - JUNE 30, 1975

TABLE 2.3-10 RELATIVE HUMIDITY WATTS BAR NUCLEAR PLANT METEOROLOGICAL FACILITY (SHEET 2 OF 2)

(DATA IN PERCENT)

JANUARY 1, 1976 - DECEMBER 31, 2008

TABLE 2.3-11 ABSOLUTE HUMIDITY WATTS BAR NUCLEAR PLANT METEOROLOGICAL FACILITY (SHEET 1 OF 2)

(DATA IN GM/M3)

JULY 1, 1973 - JUNE 30, 1975

List of Tables 2-ix

WATTS BAR LIST OF TABLES Section Title TABLE 2.3-11 ABSOLUTE HUMIDITY WATTS BAR NUCLEAR PLANT METEOROLOGICAL FACILITY (SHEET 2 OF 2)

(DATA IN GM/M3)

JANUARY 1, 1976 - DECEMBER 31, 2008

TABLE 2.3-12 FOG DATA*

TABLE 2.3-13 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS WATTS BAR NUCLEAR PLANT JAN 1, 1974 - DEC 31, 1993 TABLE 2.3-14 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-15 WIND DIRECTION PERSISTENCE DATA DISREGARDING STABILITY, WATTS BAR NUCLEAR PLANT TABLE 2.3-16 WIND DIRECTION PERSISTENCE DATA DISREGARDING STABILITY, WATTS BAR NUCLEAR PLANT TABLE 2.3-17 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-18 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-19 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-20 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-21 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-22 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-23 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT 2-x List of Tables

WATTS BAR LIST OF TABLES Section Title TABLE 2.3-24 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-25 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-26 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-27 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-28 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-29 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-30 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-31 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-32 98JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-33 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-34 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-35 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-36 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT List of Tables 2-xi

WATTS BAR LIST OF TABLES Section Title TABLE 2.3-37 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-38 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-39 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-40 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION DISREGARDING STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-41 PERCENT OCCURRENCE OF WIND SPEED*

FOR ALL WIND DIRECTIONS TABLE 2.3-42 PERCENT OCCURRENCES OF INVERSION CONDITIONS AND PASQUILL STABILITY CLASSES A-G*

WATTS BAR NUCLEAR PLANT TABLE 2.3-43 DELETED BY AMENDMENT 63 TABLE 2.3-44 INVERSION PERSISTENCE DATA WATTS BAR NUCLEAR PLANT TABLE 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 TABLE 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 TABLE 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 TABLE 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 TABLE 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 2-xii List of Tables

WATTS BAR LIST OF TABLES Section Title TABLE 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 TABLE 2.3-51 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M),

WATTS BAR NUCLEAR PLANT TABLE 2.3-52 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 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 TABLE 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 TABLE 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 TABLE 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 TABLE 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 TABLE 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 TABLE 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 List of Tables 2-xiii

WATTS BAR LIST OF TABLES Section Title TABLE 2.3-60 JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY STABILITY CLASS, WATTS BAR NUCLEAR PLANT TABLE 2.3-61 CALCULATED 1-HOUR AVERAGE ATMOSPHERIC DISPERSION FACTORS (X/Q) AT MINIMUM DISTANCE (1100 METERS) BETWEEN RELEASE ZONE (100 M RADIUS) AND EXCLUSION AREA BOUNDARY (1200 M RADIUS) FOR WATTS BAR NUCLEAR PLANT TABLE 2.3-61A CALCULATED 1-HOUR AVERAGE ATMOSPHERIC DISPERSION FACTORS (X/Q) AT MINIMUM DISTANCE (1100 METERS) BETWEEN RELEASE ZONE (100 M RADIUS) AND EXCLUSION AREA BOUNDARY (1200 M RADIUS) FOR WATTS BAR NUCLEAR PLANT TABLE 2.3-62 CALCULATED 1-HOUR AVERAGE AND ANNUAL AVERAGE ATMOSPHERIC DISPERSION FACTORS (X/Q) AT LOW POPULATION ZONE DISTANCE (4828 METERS) FOR WATTS BAR NUCLEAR PLANT TABLE 2.3-62A CALCULATED 1-HOUR AVERAGE AND ANNUAL AVERAGE ATMOSPHERIC DISPERSION FACTORS (X/Q) AT LOW POPULATION ZONE DISTANCE (4828 METERS) FOR WATTS BAR NUCLEAR PLANT TABLE 2.3-63 VALUES OF 5TH PERCENTILE OVERALL SITE 8-HOUR, 16-HOUR, 3-DAY, AND 26-DAY ATMOSPHERIC DISPERSION FACTORS (X/Q) AT LOW POPULATION ZONE DISTANCE (4828 METERS) FOR WATTS BAR NUCLEAR PLANT TABLE 2.3-63A VALUES OF 5TH PERCENTILE OVERALL SITE 8-HOUR, 16-HOUR, 3-DAY, AND 26-DAY ATMOSPHERIC DISPERSION FACTORS (X/Q) AT LOW POPULATION ZONE DISTANCE (4828 METERS) FOR WATTS BAR NUCLEAR PLANT 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 TABLE 2.3-65 0.5TH PERCENTILE SECTOR VALUES OF 8-HOUR, 16-HOUR, 3-DAY, AND 26-DAY ATMOSPHERIC DISPERSION FACTORS (X/Q) AT LOW POPULATION ZONE OUTER BOUNDARY DISTANCE (4828 METERS) FOR WATTS BAR NUCLEAR PLANT 2-xiv List of Tables

WATTS BAR LIST OF TABLES Section Title TABLE 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 TABLE 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 TABLE 2.3-67 DISPERSION METEOROLOGY - ONSITE 10-METER WIND DATA - 5TH PERCENTILE VALUES OF INVERSE WIND SPEED (1/U) DISTRIBUTIONS FOR POST-LOCA CONTROL BAY DOSE CALCULATIONS FOR WATTS BAR NUCLEAR PLANT TABLE 2.3-67A DISPERSION METEOROLOGY - ONSITE 10-METER WIND DATA - 5TH PERCENTILE VALUES OF INVERSE WIND SPEED (1/U) DISTRIBUTIONS FOR POST-LOCA CONTROL BAY DOSE CALCULATIONS FOR WATTS BAR NUCLEAR PLANT TABLE 2.4-1 LOCATION OF SURFACE WATER SUPPLIES IN THE 58.9 MILE REACH OF THE MAINSTREAM OF THE TENNESSEE RIVER BETWEEN WATTS BAR DAM (TRM 529.9) AND CHICHAMAGUA DAM (TRM 471.0)

TABLE 2.4-2 FACTS ABOUT TVA DAMS AND RESERVOIRS TABLE 2.4-3 TVA DAMS - RIVER MILE DISTANCES TO WBNP TABLE 2.4-4 FACTS ABOUT TVA DAMS ABOVE CHICKAMAUGA TABLE 2.4-5 FACTS ABOUT NON-TVA DAMS AND RESERVOIRS TABLE 2.4-6 FLOOD DETENTION CAPACITY - TVA PROJECTS ABOVE WATTS BAR NUCLEAR PLANT TABLE 2.4-7 PEAK STREAMFLOW OF THE TENNESSEE RIVER AT CHATTANOOGA, TN (USGS STATION 03568000) 1867 - 2007 TABLE 2.4-8 WEIR LENGTH DESCRIPTION AND COEFFICIENTS OF DISCHARGE FOR AREAS 3 AND 4 TABLE 2.4-9 DRAINAGE AREA PEAK DISCHARGE TABLE 2.4-10 SEASONAL VARIATIONS OF RAINFALL (PMP)

TABLE 2.4-11 PROBABLE MAXIMUM STORM PRECIPITATION AND PRECIPITATION EXCESS TABLE 2.4-12 HISTORICAL FLOOD EVENTS TABLE 2.4-13 UNIT HYDROGRAPH DATA List of Tables 2-xv

WATTS BAR LIST OF TABLES Section Title TABLE 2.4-14 FLOODS FROM POSTULATED SEISMIC FAILURE OF UPSTREAM DAMS TABLE 2.4-15 WELL AND SPRING INVENTORY WITHIN 2-MILE RADIUS OF WATTS BAR NUCLEAR PLANT SI TE TABLE 2.4-16 DELETED BY AMENDMENT 98 TABLE 2.5-1 SOIL STRENGTH TESTS TABLE 2.5-2 WATTS BAR NUCLEAR PLANT SOIL INVESTIGATION 500-KV TRANSFORMER YARD

SUMMARY

OF LABORATORY TEST DATA TABLE 2.5-3 WATTS BAR NUCLEAR PLANT SOIL INVESTIGATION 500-KV TRANSFORMER YARD

SUMMARY

OF LABORATORY TEST DATA TABLE 2.5-4 WATTS BAR NUCLEAR PLANT SOIL INVESTIGATION NORTH COOLING TOWER

SUMMARY

OF LABORATORY TEST DATA TABLE 2.5-5 WATTS BAR NUCLEAR PLANT SOIL INVESTIGATION SOUTH COOLING TOWER

SUMMARY

OF LABORATORY TEST DATA TABLE 2.5-6 WATTS BAR NUCLEAR PLANT SOIL INVESTIGATION DIESEL GENERATOR BUILDING

SUMMARY

OF LABORATORY TEST DATA TABLE 2.5-7 WATTS BAR NUCLEAR PLANT SOIL INVESTIGATION ESSENTIAL RAW COOLING WATER SUPPLY

SUMMARY

OF LABORATORY TEST DATA TABLE 2.5-8 WATTS BAR NUCLEAR PLANT INTAKE CHANNEL SOIL INVESTIGATION

SUMMARY

OF LABORATORY TEST DATA TABLE 2.5-9 WATTS BAR NUCLEAR PLANT INTAKE CHANNEL SOIL INVESTIGATION

SUMMARY

OF LABORATORY TEST DATA (SHEET 1 OF 2)

TABLE 2.5-10 WATTS BAR NUCLEAR PLANT CLASS IE CONDUITS SOIL INVESTIGATION

SUMMARY

OF LABORATORY TEST DATA 2-xvi List of Tables

WATTS BAR LIST OF TABLES Section Title TABLE 2.5-11 WATTS BAR NUCLEAR PLANT CLASS IE CONDUITS SOIL INVESTIGATION

SUMMARY

OF LABORATORY TEST DATA TABLE 2.5-12 SOIL DESIGN VALUES TABLE 2.5-13 SURFACE SETTLEMENTS (S) AND AVERAGE DEFORMATION MODULI (E) FOR CENTER OF FLEXIBLE CIRCULAR FOOTINGS LOADED WITH 5 KSF TABLE 2.5-14 EFFECT OF REMOVING TOP 10 FEET OF ROCK ON SETTLEMENT OF 10-FOOT DIAMETER FLEXIBLE FOOTING TABLE 2.5-15 AVERAGE IN SITU DOWN-HOLE SOIL DYNAMICS DIESEL GENERATOR BUILDING TABLE 2.5-16 AVERAGE SEISMIC REFRACTION SOIL DYNAMICS DIESEL GENERATOR BUILDING TABLE 2.5-17 IN-SITU SOIL DYNAMIC PROPERTIES WATTS BAR NUCLEAR POWER PLANT CLASS IE CONDUITS AND ERCW PIPING (SHEET 1 OF 2)

TABLE 2.5-17A DYNAMIC SOIL PROPERTIES - DIESEL GENERATOR BUILDING TABLE 2.5-17B DYNAMIC SOIL PROPERTIES - ADDITIONAL DIESEL GENERATOR BUILDING TABLE 2.5-17C DYNAMIC SOIL PROPERTIES - REFUELING WATER STORAGE TANKS TABLE 2.5-17D DYNAMIC SOIL PROPERTIES - NORTH STEAM VALVE ROOM TABLE 2.5-18 WATTS BAR NUCLEAR PLANT BORROW INVESTIGATION

SUMMARY

OF LABORATORY TEST DATA TABLE 2.5-19 WATTS BAR NUCLEAR PLANT ADDITIONAL BORROW AREAS

SUMMARY

OF LABORATORY TEST DATA TABLE 2.5-19A SOIL PROPERTIES, BORROW AREA 7 TABLE 2.5-20 GROUT USAGE TABLE 2.5-21 WATTS BAR NUCLEAR PLANT INTAKE CHANNEL

SUMMARY

OF LABORATORY TEST DATA REMOLDED CHANNEL AREA SOILS List of Tables 2-xvii

WATTS BAR LIST OF TABLES Section Title TABLE 2.5-22 TVA SOIL TESTING LABORATORY

SUMMARY

OF TEST RESULTS WATTS BAR LIQUEFACTION STUDY TABLE 2.5-23 WATERWAYS EXPERIMENT STATION, CORPS OF ENGINEERS TABLE 2.5-24 WATTS BAR NUCLEAR PLANT ERCW AND HPFP SYSTEMS SOIL INVESTIGATION

SUMMARY

OF LABORATORY TEST DATA TABLE 2.5-25 WATTS BAR NUCLEAR PLANT

SUMMARY

OF LABORATORY TEST DATA BORROW SOIL CLASSES TABLE 2.5-26 WATTS BAR NUCLEAR PLANT INTAKE CHANNEL SAND MATERIAL

SUMMARY

OF CYCLIC LOADING TEST DATA TABLE 2.5-27 WATTS BAR NUCLEAR PLANT INTAKE CHANNEL CLAY MATERIAL

SUMMARY

OF STATIC TEST DATA TABLE 2.5-28 DRILL ROD LENGTHS AND WEIGHTS VERSUS SPT SAMPLE D EPTHS APPLYING TO 1976 AND 1979 REPORTS TABLE 2.5-29 WATTS BAR NUCLEAR PLANT ERCW CONDUIT 1976 REPORT TABLE 2.5-30 WATTS BAR NUCLEAR PLANT ERCW CONDUIT 1976 REPORT TABLE 2.5-31 RECOMMENDED PROCEDURES AND GUIDELINES FOR STANDARD PENETRATION TESTING TABLE 2.5-32 DRILL ROD LENGTHS AND WEIGHTS VERSUS SPT 1981 REPORT TABLE 2.5-33 WATTS BAR NUCLEAR PLANT ERCW CONDUIT 1981 REPORT TABLE 2.5-34 WATTS BAR NUCLEAR PLANT ESSENTIAL RAW COOLING WATER PIPING SYSTEM LIQUEFACTION INVESTIGATION

SUMMARY

OF LABORATORY TEST DATA 2-xviii List of Tables

WATTS BAR LIST OF TABLES Section Title TABLE 2.5-35 LABORATORY PROCEDURE FOR PERFORMING CYCLIC TRIAXIAL R TESTS TABLE 2.5-36 RESULTS OF STRESS-CONTROLLED CYCLIC TRIAXIAL TESTS ON ERCW ROUTE SOILS TABLE 2.5-37

SUMMARY

OF CLASSIFICATION DATA TABLE 2.5-38

SUMMARY

OF CLASSIFICATION DATA TABLE 2.5-39

SUMMARY

OF CLASSIFICATION DATA TABLE 2.5-40

SUMMARY

OF CLASSIFICATION DATA TABLE 2.5-41 COMPARISON OF CLASSIFICATION AND DENSITY DATA OF TEST PIT AND UNDISTRIBUTED BORING SAMPLES TABLE 2.5-42 WATTS BAR NUCLEAR PLANT SOIL-SUPPORTED STRUCTURES REPRESENTATIVE BASAL GRAVEL SAMPLES

SUMMARY

OF LABORATORY TEST DATA TABLE 2.5-43 WATTS BAR NUCLEAR PLANT SOIL-SUPPORT STRUCTURES UNDISTRIBUTED SAMPLING

SUMMARY

OF LABORATORY TEST DATA TABLE 2.5-44 WBNP - BEARING CAPACITY - CATEGORY I SOIL-SUPPORTE D STRUCTURES ADOPTED SOIL PROPERTIES FOR BEARING CAPACITY DETE RMINATION TABLE 2.5-45 WATTS BAR NUCLEAR PLANT ERCW LIQUEFACTION TRENCH A

SUMMARY

OF LABORATORY TEST DATA BORROW SOIL CLASSES TABLE 2.5-45A WATTS BAR NUCLEAR PLANT ERCW LIQUEFACTION, TRENCH A SUPPLEMENTAL BORROW

SUMMARY

OF LABORATORY TEST DATA BORROW SOIL CLASSES TABLE 2.5-46 WATTS BAR NUCLEAR PLANT ERCW LIQUEFACTION TRENCH B

SUMMARY

OF LABORATORY TEST DATA BORROW SOIL CLASSES List of Tables 2-xix

WATTS BAR LIST OF TABLES Section Title TABLE 2.5-47 WATTS BAR NUCLEAR PLANT ERCW LIQUEFACTION BORROW AREA 9

SUMMARY

OF LABORATORY TEST DATA BORROW SOIL CLASSES TABLE 2.5-48 WATTS BAR NUCLEAR PLANT ERCW LIQUEFACTION BORROW AREA 10

SUMMARY

OF LABORATORY TEST DATA BORROW SOIL CLASSES TABLE 2.5-49 WATTS BAR NUCLEAR PLANT ERCW LIQUEFACTION BORROW AREA 11

SUMMARY

OF LABORATORY TEST DATA BORROW SOIL CLASSES TABLE 2.5-50 WATTS BAR NUCLEAR PLANT ERCW LIQUEFACTION BORROW AREA 12

SUMMARY

OF LABORATORY TEST DATA BORROW SOIL CLASSES TABLE 2.5-51 WATTS BAR NUCLEAR PLANT ERCW LIQUEFACTION BORROW AREA 13

SUMMARY

OF LABORATORY TEST DATA BORROW SOIL CLASSES TABLE 2.5-52 WATTS BAR NUCLEAR PLANT ERCW LIQUEFACTION BORROW AREA 2C

SUMMARY

OF LABORATORY TEST DATA BORROW SOIL CLASSES TABLE 2.5-53 WATTS BAR NUCLEAR PLANT ERCW LIQUEFACTION BORROW AREA 2C EXTENSION

SUMMARY

OF LABORATORY TEST DATA BORROW SOIL GROUPS TABLE 2.5-54

SUMMARY

OF LABORATORY TEST DATA TABLE 2.5-55 GRANULAR MATERIAL DESIGN VALUES SECTION 1032 MATERIAL 2-xx List of Tables

WATTS BAR LIST OF TABLES Section Title TABLE 2.5-56 WATTS BAR NUCLEAR PLANT RELATIVE DENSITY TEST RESULTS ON ENGINEERED GRANULAR FILL BENEATH THE DIESEL GENERATOR BUILDING TABLE 2.5-57 WATTS BAR NUCLEAR PLANT SIEVE ANALYSIS OF 1032 GRAVEL TENNESSEE VALLEY AUTHORITY TABLE 2.5-58 WATTS BAR NUCLEAR PLANT ERCW - PIEZOMETERS WATER LEVEL READINGS TABLE 2.5-59 ERCW ROUTE LIQUEFACTION EVALUATION MAXIMUM AND AVERAGE ELEMENT STRESSES AND PEAK ACCELERATION AT THE TOP OF EACH LAYER TABLE 2.5-60 FACTORS OF SAFETY WITH DEPTH WHEN THE WATER TABLE IS NOT CONSIDERED TABLE 2.5-61 FACTORS OF SAFETY WITH DEPTH ASSUMING THE WATER TABLE IS 16.5 FEET BELOW GROUND SURFACE TABLE 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 ACCELERATION TABLE 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 TABLE 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 ACCELERATION TABLE 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 TABLE 2.5-66 SOIL BEARING CAPACITIES AND FACTORS OF SAFETY FOR SOIL-SUPPORTED CATEGORY I STRUCTURES List of Tables 2-xxi

WATTS BAR LIST OF TABLES Section Title THIS PAGE INTENTIONALLY BLANK 2-xxii List of Tables

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.1-1 LOCATION OF WATTS BAR NUCLEAR PLANT SITE FIGURE 2.1-2 WATTS BAR SITE LOCATION 0-50 MILES FIGURE 2.1-3 WATTS BAR SITE LOCATION 0-10 MILES FIGURE 2.1-4A WATTS BAR TOPOGRAPHIC MAP & RESERVATION BOUNDARY FIGURE 2.1-4B SITE BOUNDARY / EXCLUSION AREA BOUNDARY FIGURE 2.1-5 MAIN PLANT GENERAL PLAN FIGURE 2.1-6 DELETED BY AMENDMENT 63 FIGURE 2.1-7 DELETED BY AMENDMENT 63 FIGURE 2.1-8 DELETED BY AMENDMENT 63 FIGURE 2.1-9 DELETED BY AMENDMENT 63 FIGURE 2.1-10 DELETED BY AMENDMENT 63 FIGURE 2.1-11 DELETED BY AMENDMENT 63 FIGURE 2.1-12 DELETED BY AMENDMENT 63 FIGURE 2.1-13 DELETED BY AMENDMENT 63 FIGURE 2.1-14 DELETED BY AMENDMENT 63 FIGURE 2.1-15 DELETED BY AMENDMENT 63 FIGURE 2.1-16 DELETED BY AMENDMENT 63 FIGURE 2.1-17 DELETED BY AMENDMENT 63 FIGURE 2.1-18 DELETED BY AMENDMENT 63 FIGURE 2.1-19 DELETED BY AMENDMENT 63 FIGURE 2.1-20 2010 CUMULATIVE POPULATION WITHIN 30 MILES/ 500 PERSONS PER SQUARE MILE FIGURE 2.1-21 2060 CUMULATIVE POPULATION WITHIN 30 MILES/ 1000 PERSONS PER SQUARE MILE FIGURE 2.2-1 AIRWAYS IN THE AREA OF THE PLANT FIGURE 2.2-2 MILITARY AIRWAYS IN THE AREA OF THE PLANT FIGURE 2.3-1 NORMAL SEA LEVEL PRESSURE DISTRIBUTION OVER NORTH AMERICA AND THE NORTH ATLANTIC OCEAN FIGURE 2.3-2 TOTAL NUMBER OF FORECAST-DAYS OF HIGH METEOROLOGICAL POTENTIAL FOR AIR POLLUTION IN A 5 YEAR PERIOD FIGURE 2.3-3 CLIMATOLOGICAL DATA SOURCES IN AREA AROUND WATTS BAR SITE List of Figures 2-xxiii

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.3-4 WIND SPEED AT 9.72 METERS ALL STABILITY CLASSES, WATTS BAR NUCLEAR PLANT, JANUARY 1, 1974 -DECEMBER 31, 1993 FIGURE 2.3-5 WIND SPEED AT 46.36 METERS ALL STABILITY CLASSES, WATTS BAR NUCLEAR PLANT, JANUARY 1, 1977 -DECEMBER 31, 1993 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 FIGURE 2.3-6B PERCENT OCCURRENCES OF PASQUILL STABILITY CLASSES E, F, AND G BY TIME OF DAY, WATTS BAR NUCLEAR PLANT, 1974-1993 FIGURE 2.3-7 WIND SPEED AT 9.72 METERS FOR STABILITY CLASS A, WATTS BAR NUCLEAR PLANT, JANUARY 1, 1974 - DECEMBER 31, 1993 FIGURE 2.3-8 WIND SPEED AT 9.72 METERS FOR STABILITY CLASS B, WATTS BAR NUCLEAR PLANT, JANUARY 1, 1974 - DECEMBER 31, 1993 FIGURE 2.3-9 WIND SPEED AT 9.72 METERS FOR STABILITY CLASS C, WATTS BAR NUCLEAR PLANT, JANUARY 1, 1974 - DECEMBER 31, 1993 FIGURE 2.3-10 WIND SPEED AT 9.72 METERS FOR STABILITY CLASS D, WATTS BAR NUCLEAR PLANT, JANUARY 1, 1974 - DECEMBER 31, 1993 FIGURE 2.3-11 WIND SPEED AT 9.72 METERS FOR STABILITY CLASS E, WATTS BAR NUCLEAR PLANT, JANUARY 1, 1974 -DECEMBER 31, 1993 FIGURE 2.3-12 WIND SPEED AT 9.72 METERS FOR STABILITY CLASS F, WATTS BAR NUCLEAR PLANT, JANUARY 1, 1974 -DECEMBER 31, 1993 FIGURE 2.3-13 WIND SPEED AT 9.72 METERS FOR STABILITY CLASS G, WATTS BAR NUCLEAR PLANT, JANUARY 1, 1974 - DECEMBER 31, 1993 FIGURE 2.3-14 TOPOGRAPHY WITHIN 10 MILE RADIUS - N FIGURE 2.3-15 TOPOGRAPHY WITHIN 10 MILE RADIUS - NNE FIGURE 2.3-16 TOPOGRAPHY WITHIN 10 MILE RADIUS - NE FIGURE 2.3-17 TOPOGRAPHY WITHIN 10 MILE RADIUS - ENE FIGURE 2.3-18 TOPOGRAPHY WITHIN 10 MILE RADIUS - E 2-xxiv List of Figures

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.3-19 TOPOGRAPHY WITHIN 10 MILE RADIUS - ESE FIGURE 2.3-20 TOPOGRAPHY WITHIN 10 MILE RADIUS - SE FIGURE 2.3-21 TOPOGRAPHY WITHIN 10 MILE RADIUS - SSE FIGURE 2.3-22 TOPOGRAPHY WITHIN 10 MILE RADIUS - S FIGURE 2.3-23 TOPOGRAPHY WITHIN 10 MILE RADIUS - SSW FIGURE 2.3-24 TOPOGRAPHY WITHIN 10 MILE RADIUS - SW FIGURE 2.3-25 TOPOGRAPHY WITHIN 10 MILE RADIUS - WSW FIGURE 2.3-26 TOPOGRAPHY WITHIN 10 MILE RADIUS - W FIGURE 2.3-27 TOPOGRAPHY WITHIN 10 MILE RADIUS - WNW FIGURE 2.3-28 TOPOGRAPHY WITHIN 10 MILE RADIUS - NW FIGURE 2.3-29 TOPOGRAPHY WITHIN 10 MILE RADIUS FIGURE 2.4-1 USGS HYDROLOGIC UNITS WITHIN THE TENNESSEE RIVER WATERSHED FIGURE 2.4-2 TVA WATER CONTROL SYSTEM FIGURE 2.4-3 SEASONAL OPERATING CURVE, CHICKAMAUGA (SHEET 1 OF 12)

FIGURE 2.4-3 SEASONAL OPERATING CURVE, WATTS BAR (SHEET 2 OF 12)

FIGURE 2.4-3 SEASONAL OPERATING CURVE, FORT LOUDOUN - TELLICO (SHEET 3 OF 12)

FIGURE 2.4-3 SEASONAL OPERATING CURVE, BOONE (SHEET 4 OF 12)

FIGURE 2.4-3 SEASONAL OPERATING CURVE, CHEROKEE (SHEET 5 OF 12)

FIGURE 2.4-3 SEASONAL OPERATING CURVE, DOUGLAS (SHEET 6 OF 12)

FIGURE 2.4-3 SEASONAL OPERATING CURVE, FONTANA (SHEET 7 OF 12)

FIGURE 2.4-3 SEASONAL OPERATING CURVE, FORT PATRICK HENRY (SHEET 8 OF 12)

FIGURE 2.4-3 SEASONAL OPERATING CURVE, MELTON HILL (SHEET 9 OF 12)

FIGURE 2.4-3 SEASONAL OPERATING CURVE, NORRIS (SHEET 10 OF 12)

FIGURE 2.4-3 SEASONAL OPERATING CURVE, SOUTH HOLSTON (SHEET 11 OF 12)

FIGURE 2.4-3 SEASONAL OPERATING CURVE, WATAUGA (SHEET 12 OF 12)

FIGURE 2.4-4 RESERVOIR ELEVATION - STORAGE RELATIONSHIP, CHICKAMAUGA (SHEET 1 OF 13)

FIGURE 2.4-4 RESERVOIR ELEVATION - STORAGE RELATIONSHIP, WATTS BAR (SHEET 2 OF 13)

List of Figures 2-xxv

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.4-4 RESERVOIR ELEVATION - STORAGE RELATIONSHIP, FORT LOUDOUN (SHEET 3 OF 13)

FIGURE 2.4-4 RESERVOIR ELEVATION - STORAGE RELATIONSHIP, TELLICO (SHEET 4 OF 13)

FIGURE 2.4-4 RESERVOIR ELEVATION - STORAGE RELATIONSHIP, BOONE (SHEET 5 OF 13)

FIGURE 2.4-4 RESERVOIR ELEVATION - STORAGE RELATIONSHIP, CHEROKEE (SHEET 6 OF 13)

FIGURE 2.4-4 RESERVOIR ELEVATION - STORAGE RELATIONSHIP, DOUGLAS (SHEET 7 OF 13)

FIGURE 2.4-4 RESERVOIR ELEVATION - STORAGE RELATIONSHIP, FONTANA (SHEET 8 OF 13)

FIGURE 2.4-4 RESERVOIR ELEVATION - STORAGE RELATIONSHIP, FORT PATRICK HENRY (SHEET 9 OF 13)

FIGURE 2.4-4 RESERVOIR ELEVATION - STORAGE RELATIONSHIP, MELTON HILL (SHEET 10 OF 13)

FIGURE 2.4-4 RESERVOIR ELEVATION - STORAGE RELATIONSHIP, NORRIS (SHEET 11 OF 13)

FIGURE 2.4-4 RESERVOIR ELEVATION - STORAGE RELATIONSHIP, SOUTH HOLSTON (SHEET 12 OF 13)

FIGURE 2.4-4 RESERVOIR ELEVATION - STORAGE RELATIONSHIP, WATAUGA (SHEET 13 OF 13)

FIGURE 2.4-5 TENNESSEE RIVER MILE 464.2 - DISTRIBUTION OF FLOODS AT CHATTANOOGA, TENNESSEE FIGURE 2.4-6 PROBABLE MAXIMUM PRECIPITATION ISOHYETS FOR 21,400 SQ. MI. EVENT, DOWNSTREAM PLACEMENT FIGURE 2.4-7 PROBABLE MAXIMUM PRECIPITATION ISOHYETS FOR 7980 SQ. MI. EVENT, CENTERED AT BULLS GAP, TN FIGURE 2.4-8 RAINFALL TIME DISTRIBUTION - TYPICAL MASS CURVE FIGURE 2.4-9 DRAINAGE AREAS ABOVE CHICKAMAUGA DAM FIGURE 2.4-10 UNIT HYDROGRAPHS, AREAS 1-5 (SHEET 1 OF 11)

FIGURE 2.4-10 UNIT HYDROGRAPHS, AREAS 6-9 (SHEET 2 OF 11)

FIGURE 2.4-10 UNIT HYDROGRAPHS, AREAS 10-13 (SHEET 3 OF 11)

FIGURE 2.4-10 UNIT HYDROGRAPHS, AREAS 14-18 (SHEET 4 OF 11)

FIGURE 2.4-10 UNIT HYDROGRAPHS, AREAS 19-22 (SHEET 5 OF 11)

FIGURE 2.4-10 UNIT HYDROGRAPHS, AREAS 23-27 (SHEET 6 OF 11) 2-xxvi List of Figures

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.4-10 UNIT HYDROGRAPHS, AREAS 33, 34, 36 (SHEET 7 OF 11)

FIGURE 2.4-10 UNIT HYDROGRAPHS, AREAS 35, 37 (SHEET 8 OF 11)

FIGURE 2.4-10 UNIT HYDROGRAPHS, AREAS 38, 39, 41, 42 (SHEET 9 OF 11)

FIGURE 2.4-10 UNIT HYDROGRAPHS, AREAS 40, 43, 44A, 44B (SHEET 10 OF 11)

FIGURE 2.4-10 UNIT HYDROGRAPHS, AREA 45 (SHEET 11 OF 11)

FIGURE 2.4-11 DISCHARGE RATING CURVE, CHICKAMAUGA DAM (SHEET 1 OF 13)

FIGURE 2.4-11 DISCHARGE RATING CURVE, WATTS BAR DAM (SHEET 2 OF 13)

FIGURE 2.4-11 DISCHARGE RATING CURVE, FORT LOUDOUN DAM (SHEET 3 OF 13)

FIGURE 2.4-11 DISCHARGE RATING CURVE, TELLICO DAM (SHEET 4 OF 13)

FIGURE 2.4-11 DISCHARGE RATING CURVE, BOONE DAM (SHEET 5 OF 13)

FIGURE 2.4-11 DISCHARGE RATING CURVE, CHEROKEE DAM (SHEET 6 OF 13)

FIGURE 2.4-11 DISCHARGE RATING CURVE, DOUGLAS DAM (SHEET 7 OF 13)

FIGURE 2.4-11 DISCHARGE RATING CURVE, FONTANA DAM (SHEET 8 OF 13)

FIGURE 2.4-11 DISCHARGE RATING CURVE, FORT PATRICK HENRY DAM (SHEET 9 OF 13)

FIGURE 2.4-11 DISCHARGE RATING CURVE, MELTON HILL DAM (SHEET 10 OF 13)

FIGURE 2.4-11 DISCHARGE RATING CURVE, NORRIS DAM (SHEET 11 OF 13)

FIGURE 2.4-11 DISCHARGE RATING CURVE, SOUTH HOLSTON DAM (SHEET 12 OF 13)

FIGURE 2.4-11 DISCHARGE RATING CURVE, WATAUGA DAM (SHEET 13 OF 13)

FIGURE 2.4-12 FORT LOUDOUN - TELLICO SOCH UNSTEADY FLOW MODEL SCHEMATIC FIGURE 2.4-13 UNSTEADY FLOW MODEL FORT LOUDOUN RESERVOIR MARCH 1973 FLOOD (SHEET 1 OF 2)

FIGURE 2.4-13 UNSTEADY FLOW MODEL FORT LOUDOUN RESERVOIR MARCH 1973 FLOOD (SHEET 2 OF 2)

FIGURE 2.4-14 UNSTEADY FLOW MODEL FORT LOUDOUN - TELLICO RESERVOIR MAY 2003 FLOOD (SHEET 1 OF 3)

FIGURE 2.4-14 UNSTEADY FLOW MODEL FORT LOUDOUN - TELLICO RESERVOIR MAY 2003 FLOOD (SHEET 2 OF 3)

List of Figures 2-xxvii

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.4-14 UNSTEADY FLOW MODEL FORT LOUDOUN - TELLICO RESERVOIR MAY 2003 FLOOD (SHEET 3 OF 3)

FIGURE 2.4-15 WATTS BAR SOCH UNSTEADY FLOW MODEL SCHEMATIC FIGURE 2.4-16 UNSTEADY FLOW MODEL WATTS BAR RESERVOIR MARCH 1973 FLOOD FIGURE 2.4-17 UNSTEADY FLOW MODEL WATTS BAR RESERVOIR MAY 2003 FLOOD FIGURE 2.4-18 CHICKAMAUGA SOCH UNSTEADY FLOW MODEL SCHEMATIC FIGURE 2.4-19 UNSTEADY FLOW MODEL CHICKAMAUGA RESERVOIR MARCH 1973 FLOOD FIGURE 2.4-20 UNSTEADY FLOW MODEL CHICKAMAUGA RESERVOIR MAY 2003 FLOOD FIGURE 2.4-21 CHICKAMAUGA STEADY STATE PROFILE COMPARISONS FIGURE 2.4-22 TAILWATER RATING CURVE, WATTS BAR DAM FIGURE 2.4-23 PMF DISCHARGE HYDROGRAPH AT WATTS BAR NUCLEAR PLANT FIGURE 2.4-24 WEST SADDLE DIKE LOCATION PLAN AND SECTION FIGURE 2.4-25 PMF ELEVATION HYDROGRAPH AT WATTS BAR NUCLEAR PLANT FIGURE 2.4-26 PROBABLE MAXIMUM FLOOD AND BOTTOM PROFILES FIGURE 2.4-27 MAIN PLANT GENERAL GRADING PLAN FIGURE 2.4-28 WATTS BAR NUCLEAR PLANT WIND WAVE FETCH FIGURE 2.4-29 EXTREME VALUE ANALYSIS 30-MINUTE WIND SPEED FROM THE SOUTHWEST CHATTANOOGA, TN 1948-74 FIGURE 2.4-30 THRU FIGURE 2.4-40 ARE NOT USED FIGURE 2.4-40A MAIN PLANT SITE GRADING AND DRAINAGE SYSTEM FOR FLOOD STUDIES SHEET 1 FIGURE 2.4-40A DELETED BY AMENDMENT 101 FIGURE 2.4-40A DELETED BY AMENDMENT 101 FIGURE 2.4-40B MAIN PLANT GENERAL PLAN FIGURE 2.4-40C YARD SITE GRADING AND DRAINAGE SYSTEM FOR FLOOD STUDIES FIGURE 2.4-40D-1 MAIN PLANT PLANT PERIMETER ROADS PLAN AND PROFILE SHEET 1 2-xxviii List of Figures

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.4-40D MAIN PLANT PLANT PERIMETER ROADS PLAN AND PROFILE

- SHEET 2 FIGURE 2.4-40D MAIN PLANT PLANT PERIMETER ROADS PLAN AND PROFILE

- SHEET 3 FIGURE 2.4-40E ACCESS HIGHWAY TVA DWG 1001H202 R4 - SHEET 1 FIGURE 2.4-40E ACCESS HIGHWAY TVA DWG. 1001H201 R4 - SHEET 2 FIGURE 2.4-40F MAIN PLANT MAIN PLANT TRACKS PLAN - SHEET 1 FIGURE 2.4-40F MAIN PLANT MAIN PLANT TRACKS SECTIONS & PROFILES -

SHEET 2 FIGURE 2.4-40F MAIN PLANT MAIN PLANT TRACKS SECTIONS & PROFILES -

SHEET 3 FIGURE 2.4-40G YARD, GRADING DRAINAGE AND SURFACING TRANSFORMER & SWITCHYARD - SHEET 1 FIGURE 2.4-40G YARD, GRADING DRAINAGE AND SURFACING TRANSFORMER & SWITCHYARD - SHEET 2 FIGURE 2.4-40G YARD, GRADING DRAINAGE AND SURFACING TRANSFORMER & SWITCHYARD - SHEET 3 FIGURE 2.4-40H PROBABLE MAXIMUM PRECIPATION POINT RAINFALL FIGURE 2.4-40I DELETED BY AMENDMENT 83 FIGURE 2.4-40J DELETED BY AMENDMENT 83 FIGURE 2.4-40K DELETED BY AMENDMENT 83 FIGURE 2.4-40L DELETED BY AMENDMENT 83 FIGURE 2.4-41 THRU FIGURE 2.4-60 ARE NOT USED FIGURE 2.4-61 WATTS BAR PROBABLE MAXIMUM FLOOD WATER LEVELS BEFORE AND AFTER EMBANKMENT FAILURE FIGURE 2.4-62 RELATIVE BORE HEIGHT (AFTER J. J. STROKER, REF. 31)

FIGURE 2.4-63 ASSUMED LIMITS OF EMBANKMENT FAILURE WAVE EXPANSION FIGURE 2.4-64 WATTS BAR NUCLEAR PLANT PROBABLE MAXIMUM FLOOD ELEVATION FIGURE 2.4-65 THRU FIGURE 2.4-67 ARE NOT USED FIGURE 2.4-68 POWERHOUSE & SPILLWAY RESULTS OF ANALYSIS FOR OPERATING BASIS EARTHQUAKE - WATTS BAR DAM FIGURE 2.4-69 EMBANKMENT RESULTS OF ANALYSIS FOR OPERATING BASIS EARTHQUAKE FIGURE 2.4-70 DELETED BY AMENDMENT 83 List of Figures 2-xxix

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.4-71 POWERHOUSE & SPILLWAY RESULTS OF ANALYSIS FOR OPERATING BASIS EARTHQUAKE - FORT LOUDOUN DAM FIGURE 2.4-72 EMBANKMENT RESULTS OF ANALYSIS FOR OPERATING BASIS EARTHQUAKE - FORT LOUDOUN DAM FIGURE 2.4-73 NONOVERFLOW & SPILLWAY RESULTS OF ANALYSIS FOR OPERATING BASIS EARTHQUAKE - TELLICO DAM FIGURE 2.4-74 EMBANKMENT RESULTS FOR ANALYSIS FOR OPERATING BASIS EARTHQUAKE - TELLICO DAM FIGURE 2.4-75 SPILLWAY & NONOVERFLOW RESULTS OF ANALYSIS FOR OBE & 1/2 PMF-NORRIS DAM FIGURE 2.4-76 ANALYSIS FOR OBE & 1/2 PMF ASSUMED CONDITION OF DAM AFTER FAILURE NORRIS DAM FIGURE 2.4-77 SPILLWAY & NONOVERFLOW RESULTS OF ANALYSIS FOR OPERATING BASIS EARTHQUAKE -CHEROKEE DAM FIGURE 2.4-78 EMBANKMENT RESULTS OF ANALYSIS FOR OPERATING BASIS EARTHQUAKE - CHEROKEE DAM FIGURE 2.4-79 ASSUMED CONDITION OF DAM AFTER FAILURE PBE AND 1/2 PROBABLE MAX FLOOD - CHEROKEE DAM FIGURE 2.4-80 SPILLWAY & NONOVERFLOW RESULTS OF ANALYSIS FOR OPERATING BASIS EARTHQUAKE - DOUGLAS DAM FIGURE 2.4-81 SADDLE DAM NO. 1 RESULTS OF ANALYSIS FOR OPERATING BASIS EARTHQUAKE - DOUGLAS DAM FIGURE 2.4-82 DOUGLAS DAM ASSUMED CONDITION OF DAM AFTER FAILURE ABE AND 1/2 PROBABLE MAXIMUM FLOOD -

DOUGLAS PROJECT FIGURE 2.4-83 FONTANA DAM ASSUMED CONDITION OF DAM AFTER FAILURE ABE AND 1/2 PROBABLE MAXIMUM FLOOD -

FONTANA DAM FIGURE 2.4-84 DELETED BY AMENDMENT 63 FIGURE 2.4-85 DELETED BY AMENDMENT 63 FIGURE 2.4-86 SPILLWAY RESULTS OF ANALYSIS FOR SSE EARTHQUAKE FORT LOUDOUN DAM FIGURE 2.4-87 EMBANKMENT RESULTS OF ANALYSIS FOR SSE EARTHQUAKE FORT LOUDOUN DAM FIGURE 2.4-88 FORT LOUDOUN DAM ASSUMED CONDITION OF DAM AFTER FAILURE SSE COMBINED WITH A 25 YEAR FLOOD - FORT LOUDOUN DAM 2-xxx List of Figures

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.4-89 TELLICO DAM ASSUMED CONDITION OF DAM AFTER FAILURE SSE COMBINED WITH A 25 YEAR FLOOD TELLICO PROJECT FIGURE 2.4-90 NORRIS DAM SSE + 25 YEAR FLOOD JUDGED CONDITION OF DAM AFTER FAILURE - NORRIS DAM FIGURE 2.4-91 SSE WITH EPICENTER IN NORTH KNOXVILLE VICINITY FIGURE 2.4-92 TIME AND DATE FLOOD HYDROGRAPHS FIGURE 2.4-93 SSE WITH EPICENTER IN WEST KNOXVILLE VICINITY FIGURE 2.4-94 LOCATION OF SSE FOR SIMULTANEOUS FAILURE OF THE DOUGLAS AND FONTANA DAMS FIGURE 2.4-95 TENNESSEE RIVER MILE 523.2 WATTS BAR NUCLEAR PLANT RATING CURVE FIGURE 2.4-96 CROSS SECTIONS TENNESSEE RIVER (MILE 521.00) (MILE 520.70) (MILE 520.60)

FIGURE 2.4-97 CHANNEL PROFILE TENNESSEE RIVER (MILE 520.0 TO MILE 521.37)

FIGURE 2.4-98 NOT USED FIGURE 2.4-99 GRADING PLAN INTAKE CHANNEL FIGURE 2.4-100 DELETED BY AMENDMENT 83 FIGURE 2.4-101 DELETED BY AMENDMENT 33 FIGURE 2.4-102 WELLS AND SPRING INVENTORY WITHIN 2-MILE RADIUS OF WATTS BAR NUCLEAR PLANT SITE FIGURE 2.4-103 WATER-LEVEL FLUCTUATIONS IN OBSERVATION WELLS AT THE WATTS BAR SITE FIGURE 2.4-104 LOCATIONS OF GROUND - WATER OBSERVATION WELLS FIGURE 2.4-105 GENERALIZED WATER-TABLE CONTOUR MAP JANUARY 1972 FIGURE 2.4-106 MECHANICAL - FLOW DIAGRAM FUEL POOL COOLING AND CLEANING SYSTEM FIGURE 2.4-107 POWERHOUSE UNITS 1 & 2 FLOW DIAGRAM - RESIDUAL HEAT REMOVAL SYSTEM FIGURE 2.4-108 SCHEMATIC FLOW DIAGRAM FLOOD PROTECTION PROVISIONS OPEN REACTOR COOLING (UNIT 1 SHOWN, UNIT 2 SIMILAR)

FIGURE 2.4-109 SCHEMATIC FLOW DIAGRAM FLOOD PROTECTION PROVISIONS NATURAL CONVECTION COOLING (UNIT 1 SHOWN, UNIT 2 SIMILAR)

List of Figures 2-xxxi

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.4-110 WATTS BAR NUCLEAR PLANT RAINFALL FLOOD PROTECTION PLAN BASIS FOR SAFE SHUTDOWN FOR PLANT FLOODING FIGURE 2.4-111 DOUGLAS PMF FAILURE WAVE AT WATTS BAR PLANT FIGURE 2.5-1 REGIONAL PHYSIOGRAPHIC MAP FIGURE 2.5-2 REGIONAL GEOLOGIC MAP FIGURE 2.5-3 SUBREGIONAL GEOLOGIC SETTING (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-4 REGIONAL TECTONIC MAP FIGURE 2.5-5 REGIONAL BOUGUER GRAVITY ANOMALY MAP FIGURE 2.5-6 REGIONAL MAGNETIC MAP FIGURE 2.5-7 REGIONAL FAULT MAP FIGURE 2.5-8 SUBREGIONAL FAULT MAP FIGURE 2.5-9 GEOLOGIC MAP OF PLANT AREA (NORTH SEGMENT)

FIGURE 2.5-10 GEOLOGIC MAP OF PLANT AREA (SOUTH SEGMENT)

FIGURE 2.5-11 GEOLOGIC SECTION THROUGH PLANT AREA (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-12 CORE DRILL HOLE AND SEISMIC REFRACTION LOCATIONS FIGURE 2.5-13 CORE DRILL LAYOUT AND

SUMMARY

FIGURE 2.5-14 GRAPHIC LOG HOLE 1 STA. C-60+00 FIGURE 2.5-15 GRAPHIC LOG HOLE 2 STA. C-64+00 FIGURE 2.5-16 GRAPHIC LOG HOLE 3 STA. C-68+00 FIGURE 2.5-17 GRAPHIC LOG HOLE 4 STA. E-60+00 FIGURE 2.5-18 GRAPHIC LOG HOLE 5 STA. E-62+00 FIGURE 2.5-19 GRAPHIC LOG HOLE 6 STA. E-64+00 FIGURE 2.5-20 GRAPHIC LOG HOLE 7 STA. E-66+00 FIGURE 2.5-21 GRAPHIC LOG HOLE 8 STA. E-88+40 FIGURE 2.5-22 GRAPHIC LOG HOLE 9 STA. G-60+00 FIGURE 2.5-23 GRAPHIC LOG HOLE 10 STA. G-62+00 FIGURE 2.5-24 GRAPHIC LOG HOLE 11 STA. G-64+00 FIGURE 2.5-25 GRAPHIC LOG HOLE 12 STA. G-66+00 FIGURE 2.5-26 GRAPHIC LOG HOLE 13 STA. G-68+00 FIGURE 2.5-27 GRAPHIC LOG HOLE 14 STA. J-60+00 FIGURE 2.5-28 GRAPHIC LOG HOLE 15 STA. J-62+00 2-xxxii List of Figures

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-29 GRAPHIC LOG HOLE 16 STA. J-64+00 FIGURE 2.5-30 GRAPHIC LOG HOLE 17 STA. J-66+00 FIGURE 2.5-31 GRAPHIC LOG HOLE 18 STA. J-82+25 FIGURE 2.5-32 GRAPHIC LOG HOLE 19 STA. L-60+00 FIGURE 2.5-33 GRAPHIC LOG HOLE 20 STA. L-6L+00 FIGURE 2.5-34 GRAPHIC LOG HOLE 21 STA. L-62+00 FIGURE 2.5-35 GRAPHIC LOG HOLE 22 STA. L-64+00 FIGURE 2.5-36 GRAPHIC LOG HOLE 23 STA. L-66+00 FIGURE 2.5-37 GRAPHIC LOG HOLD 24 STA. L-68+00 FIGURE 2.5-38 GRAPHIC LOG HOLE M-59+00 FIGURE 2.5-39 GRAPHIC LOG HOLE 26M-60+00 FIGURE 2.5-40 GRAPHIC LOG HOLE 27 STA. M-6L+00 FIGURE 2.5-41 GRAPHIC LOG HOLE 28 STA.M-62+00 FIGURE 2.5-42 GRAPHIC LOG HOLE 29 STA. M-63+00 FIGURE 2.5-43 GRAPHIC LOG HOLE 30 STA. M-64+00 FIGURE 2.5-44 GRAPHIC LOG HOLE 31 STA. M-65+00 FIGURE 2.5-45 GRAPHIC LOG HOLE 32 STA. M-66+00 FIGURE 2.5-46 GRAPHIC LOG HOLE 33 STA. N-59+00 FIGURE 2.5-47 GRAPHIC LOG HOLE 34 STA. N-60+00 FIGURE 2.5-48 GRAPHIC LOG HOLE 35 STA. N-6L+00 FIGURE 2.5-49 GRAPHIC LOG HOLE 36 STA. N-62+00 FIGURE 2.5-50 GRAPHIC LOG HOLE 37 STA. N-63+00 FIGURE 2.5-51 GRAPHIC LOG HOLE 38 STA. N-64+00 FIGURE 2.5-52 GRAPHIC LOG HOLE 39 STA. N-65+00 FIGURE 2.5-53 GRAPHIC LOG HOLE 40 STA. N-66+00 FIGURE 2.5-54 GRAPHIC LOG HOLE 41 STA. 0-60+00 FIGURE 2.5-55 GRAPHIC LOG HOLE 42 STA. 0-61+00 FIGURE 2.5-56 GRAPHIC LOG HOLE 43 STA. 0-62+00 FIGURE 2.5-57 GRAPHIC LOG HOLE 44 STA. 0-63+00 FIGURE 2.5-58 GRAPHIC LOG HOLE 45 STA. 0-64+00 FIGURE 2.5-59 GRAPHIC LOG HOLE 46 STA. 0-65+00 FIGURE 2.5-60 GRAPHIC LOG HOLE 47 STA. 0-66+00 FIGURE 2.5-61 GRAPHIC LOG HOLE 48 STA. P-60+00 List of Figures 2-xxxiii

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-62 GRAPHIC LOG HOLE 49 STA. P-62+00 (SHEET 1 OF 4)

FIGURE 2.5-63 GRAPHIC LOG HOLE 50 STA. P-63+00 FIGURE 2.5-64 GRAPHIC LOG HOLE 51 STA. P-64+00 FIGURE 2.5-65 GRAPHIC LOG HOLE 52 STA. P-65+00 FIGURE 2.5-66 GRAPHIC LOG HOLE 53 STA. P-66+00 FIGURE 2.5-67 GRAPHIC LOG HOLE 54 STA. P-68+00 FIGURE 2.5-68 GRAPHIC LOG HOLE 55 STA. R-62+00 FIGURE 2.5-69 GRAPHIC LOG HOLE 56 STA. R-64+00 FIGURE 2.5-70 SPECIAL STUDIES LAYOUT AND

SUMMARY

FIGURE 2.5-71 (PLEASE SEE FIGURES DVD FOR ACTUAL FIGURE)

FIGURE 2.5-72 3-D ELASTIC PROPERTIES TABULATION STA. L-61+00 DEPTH 32.0 - 46.5 FIGURE 2.5-73 3-D ELASTIC PROPERTIES TABULATION STA. L-61+00 DEPTH 47.0 - 61.5 FIGURE 2.5-74 3-D ELASTIC PROPERTIES TABULATION STA. L-61+00 DEPTH 62.0 - 76.5 FIGURE 2.5-75 3-D ELASTIC PROPERTIES TABULATION STA. L-61+00 DEPTH 77.0 - 91.5 FIGURE 2.5-76 3-D ELASTIC PROPERTIES TABULATION STA. L-61+00 DEPTH 92.0 - 106.5 FIGURE 2.5-77 3-D ELASTIC PROPERTIES TABULATION STA. L-61+00 DEPTH 107.0 - 121.5 FIGURE 2.5-78 3-D ELASTIC PROPERTIES TABULATION STA. L-61+00 DEPTH 122.0 - 136.5 FIGURE 2.5-79 3-D ELASTIC PROPERTIES TABULATION STA. L-61+00 DEPTH 137.0 - 151.5 FIGURE 2.5-80 3-D ELASTIC PROPERTIES TABULATION STA. L-61+00 DEPTH 152.0 - 166.5 FIGURE 2.5-81 3-D ELASTIC PROPERTIES TABULATION STA. L-61+00 DEPTH 167.0 - 176.0 FIGURE 2.5-82 GRAPHIC LOG AND ELASTIC MODULI STA. M-63+00 FIGURE 2.5-83 3-D ELASTIC PROPERTIES TABULATION STA. M-63+00 DEPTH 44.0 - 58.5 FIGURE 2.5-84 3-D ELASTIC PROPERTIES TABULATION STA. M-63+00 DEPTH 59.0 - 73.5 2-xxxiv List of Figures

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-85 3-D ELASTIC PROPERTIES TABULATION STA. M-63+00 DEPTH 74.0 - 88.5 FIGURE 2.5-86 3-D ELASTIC PROPERTIES TABULATION STA. M-63+00 DEPTH 89.0 - 90.0 FIGURE 2.5-87 GRAPHIC LOG AND ELASTIC MODULI STA. N-6L+00 FIGURE 2.5-88 3-D ELASTIC PROPERTIES TABULATION STA. N-61+00 DEPTH 35.0 - 49.5 FIGURE 2.5-89 3-D ELASTIC PROPERTIES TABULATION STA. N-61+00 DEPTH 50.0 - 64.5 FIGURE 2.5-90 3-D ELASTIC PROPERTIES TABULATION STA. N-61+00 DEPTH 65.0 - 79.5 FIGURE 2.5-91 3-D ELASTIC PROPERTIES TABULATION STA. N-61+00 DEPTH 80.0 - 92.0 FIGURE 2.5-92 GRAPHIC LOG AND ELASTIC MODULA STA. N-62+00 FIGURE 2.5-93 3-D ELASTIC PROPERTIES TABULATION STA. N-62+00 DEPTH 45.0 - 59.5 FIGURE 2.5-94 3-D ELASTIC PROPERTIES TABULATION STA. N-62+00 DEPTH 60.0 - 70.0 FIGURE 2.5-95 GRAPHIC LOG AND ELASTIC MODULI STA. 0-60+00 FIGURE 2.5-96 3-D ELASTIC PROPERTIES TABULATION STA. 0-60+00 DEPTH 38.0 - 52.5 FIGURE 2.5-97 3-D ELASTIC PROPERTIES TABULATION STA. 0-60+00 DEPTH 53.0 -67.5 FIGURE 2.5-98 3-D ELASTIC PROPERTIES TABULATION STA. 0-60+00 DEPTH 68.0 - 80.0 FIGURE 2.5-99 GRAPHIC LOG AND ELASTIC MODULI STA. 0-61+00 FIGURE 2.5-100 3-D ELASTIC PROPERTIES TABULATION STA. 0-61+00 DEPTH 37.0 - 51.5 FIGURE 2.5-101 3-D ELASTIC PROPERTIES TABULATION STA. 0-61+00 DEPTH 52.0 - 66.5 FIGURE 2.5-102 3-D ELASTIC PROPERTIES TABULATION STA. 0-61+00 DEPTH 67.0 - 81.5 FIGURE 2.5-103 3-D ELASTIC PROPERTIES TABULATION STA. 0-61+00 DEPTH 82.0 - 92.0 FIGURE 2.5-104 GRAPHIC LOG AND ELASTIC MODULI STA. 0-62+00 FIGURE 2.5-105 3-D ELASTIC PROPERTIES TABULATION STA. 0-62+00 DEPTH 43.0 - 57.5 List of Figures 2-xxxv

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-106 3-D ELASTIC PROPERTIES TABULATION STA. 0-62+00 DEPTH 58.0 - 72.5 FIGURE 2.5-107 3-D ELASTIC PROPERTIES TABULATION STA. 0-62+00 DEPTH 73.0 - 87.5 FIGURE 2.5-108 3-D ELASTIC PROPERTIES TABULATION STA. 0-62+00 DEPTH 88.0 - 101.0 FIGURE 2.5-109 CROSS-HOLE DYNAMIC SECTIONS AND

SUMMARY

FIGURE 2.5-110 PLAN VIEW GEOLOGIC MAP OF REACTOR, AUXILIARY AND CONTROL BUILDINGS FIGURE 2.5-111 PLAN VIEW GEOLOGIC MAP OF TURBINE BUILDING FIGURE 2.5-112 GEOLOGIC SECTION ALONG A+8 AND A+14 LINES FROM T6 TO T11 FIGURE 2.5-113 GEOLOGIC SECTION ALONG N LINE FROM CL TO C13 FIGURE 2.5-114 SECTION ALONG A4+9.5 FROM T+3.5 TO W+12.5 FIGURE 2.5-115 GEOLOGIC SECTION AND PANORAMIC PHOTOGRAPH Q-4 LINE FROM A4-3 TO A12+3 FIGURE 2.5-116 GEOLOGIC SECTIONS AUXILIARY AND TURBINE BUILDINGS FIGURE 2.5-117 GEOLOGIC SECTIONS AND PANORAMIC PHOTOGRAPHS (UNIT 2)

FIGURE 2.5-118 GEOLOGIC SECTIONS AND PANORAMIC PHOTOGRAPHS (UNIT 1)

FIGURE 2.5-119 GEOLOGIC SECTIONS AND PANORAMIC PHOTOGRAPHS OF REACTOR 2 EAST PERIMETER WALL FIGURE 2.5-120 GEOLOGIC SECTION AND PANORAMIC PHOTOGRAPH OF REACTOR 1 WEST PERIMETER WALL FIGURE 2.5-121 GEOLOGIC PLAN AND SECTIONS INTAKE STRUCTURE FOUNDATION FIGURE 2.5-122 GENERALIZED GEOLOGIC SECTION AND SOIL PROFILE FIGURE 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.

FIGURE 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 ACROSS SE PERIMETER OF REACTOR #1. VIEWED SOUTHWEST.

2-xxxvi List of Figures

WATTS BAR LIST OF FIGURES Section Title FIGURE 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.

FIGURE 2.5-126 CLOSEUP OF REACTOR #1 NORMAL FAULT AT 72 DEGREES.

VIEWED WEST.

FIGURE 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.

FIGURE 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.

FIGURE 2.5-129 GRAVITY OR NORMAL FAULT ON NORTHEAST REACTOR #1 PERIMETER AT 233 DEGREES. FAULT PLANE DIPS NORTH AT 40 DEGREES. VIEWED WEST.

FIGURE 2.5-130 FAULT IN REACTOR #2 EAST WALL AT APPROXIMATELY 130 DEGREES. VIEWED EAST.

FIGURE 2.5-131 FAULT IN REACTOR #2 CAVITY WALL AT APPROXIMATELY 354 DEGREES. ELEVATION 680.0 AT BASE. VIEWED SOUTHWEST.

FIGURE 2.5-132 FAULT IN SOUTH WALL OF DISCHARGE CHANNEL SHOWING TRUNCATION BY OVERLYING TERRACE GRAVEL DEPOSIT.

FIGURE 2.5-133 FAULT IN NORTH WALL OF DISCHARGE CHANNEL SHOWING TRUNCATION BY TERRACE GRAVEL DEPOSIT.

FIGURE 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.

FIGURE 2.5-135 FAULT IN VERTICAL EXCAVATION CUT AT 20 FEET EAST OF A8 AND 18.50 FEET NORTH OF Y. VIEWED NORTH.

FIGURE 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.

FIGURE 2.5-137 SAPROLITE - TERRACE GRAVEL CONTACT. HEMATITIC CRUSTS ARE SEEN TO BE DISPERSED AT SEVERAL LEVELS IN THE TERRACE GRAVEL. VIEWED SOUTH IN THE EXHAUST CUT APPROXIMATELY 150 FEET EAST OF THE POWERHOUSE FOUNDATION.

List of Figures 2-xxxvii

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-138 SITE OF WOOD SPECIMEN COLLECTION FOR CARBON 14 AGE DATING. LOCATION IS 3 FEET ABOVE TERRACE GRAVEL DEPOSIT. SCALE: OPENED BRUNTON COMPASS = 8.5 INCHES.

LOCATION: APPROXIMATELY 18.51 NORTH OF Y AT A5 LINE.

APPROXIMATE ELEVATION 717.5.

FIGURE 2.5-139 LAYOUT DIAGRAM FOR HORIZONTAL AND ANGLE HOLES FIGURE 2.5-140 PLANE INTERSECTING DISINTEGRATED SHALE POCKET FIGURE 2.5-141 PLANE VIEW ONTO THE 673 ELEVATION FIGURE 2.5-142 PLANE VIEW ONTO THE 671 ELEVATION FIGURE 2.5-143 DRILL LAYOUT DIAGRAM FOR VERTICAL HOLES VIEWED ONTO THE 671 ELEVATION FIGURE 2.5-144 REACTOR 2 GROUT LAYOUT FIGURE 2.5-145 EARTHQUAKE EPICENTERS FIGURE 2.5-146 MAJOR EARTHQUAKE IN UNITED STATES THROUGH 1972 FIGURE 2.5-147 ISOSEISMAL MAP MAXIMUM EFFECTS 1811-1812 NEW MADRID EARTHQUAKE FIGURE 2.5-148 ISOSEISMAL MAP 1811 NEW MADRID EARTHQUAKE FIGURE 2.5-149 FELT AREA MAPS FIGURE 2.5-150 ISOSEISMAL MAP 1886 CHARLESTON, S.C. EARTHQUAKE FIGURE 2.5-151 FELT AREA MAP EAST TENNESSEE EARTHQUAKE OF APRIL 17, 1913 FIGURE 2.5-152 ISOSEISMAL MAP 1916 SOUTHERN APPALACHIAN EARTHQUAKE FIGURE 2.5-153 ISOSEISMAL MAP 1916 ALABAMA EARTHQUAKE FIGURE 2.5-154 ISOSEISMAL MAP 1924 SOUTHERN APPALACHIAN EARTHQUAKE FIGURE 2.5-155 FELT AREA MAP 1940 CHATTANOOGA EARTHQUAKE FIGURE 2.5-156 ISOSEISMAL MAP 1968 SOUTHERN ILLINOIS EARTHQUAKE FIGURE 2.5-157 FELT AREA MAP EAST TENNESSEE EARTHQUAKE JULY 13, 1969 FIGURE 2.5-158 ISOSEISMAL MAP ELSGOOD, WEST VIRGINIA EARTHQUAKE (NOVEMBER 20, 1969)

FIGURE 2.5-159 ISOSEISMAL MAP MARYVILLE-ALCOA EARTHQUAKE NOVEMBER 30, 1973 FIGURE 2.5-160 SEISMIC REFLECTION PROFILE 2-xxxviii List of Figures

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-161 INDEX MAP - ALL EARTHQUAKES LATITUDE 32.5-38.5 NORTH LONGITUDE 80.5-89.0 WEST FIGURE 2.5-162 EARTHQUAKE LISTING ALL EARTHQUAKES LATITUDE 32.5-38.5 NORTH LONGITUDE 80.5-89.0 WEST FIGURE 2.5-163 EARTHQUAKE LISTING ALL EARTHQUAKES LATITUDE 32.5-38.5 NORTH LONGITUDE 80.5-89.0 WEST FIGURE 2.5-164 EARTHQUAKE LISTING ALL EARTHQUAKES LATITUDE 32.5-38.5 NORTH LONGITUDE 80.5-89.0 WEST FIGURE 2.5-165 EARTHQUAKE LISTING ALL EARTHQUAKES LATITUDE 32.5-38.5 NORTH LONGITUDE 80.5-89.0 WEST FIGURE 2.5-166 EARTHQUAKE LISTING ALL EARTHQUAKES LATITUDE 32.5-38.5 NORTH LONGITUDE 80.5-89.0 WEST FIGURE 2.5-167 EARTHQUAKE LISTING ALL EARTHQUAKES LATITUDE 32.5-38.5 NORTH LONGITUDE 80.5-89.0 WEST FIGURE 2.5-168 EARTHQUAKE LISTING ALL EARTHQUAKES LATITUDE 32.5-38.5 NORTH LONGITUDE 80.5-89.0 WEST FIGURE 2.5-169 INDEX MAP -EARTHQUAKES 4.3 RICHTER OR GREATER LATITUDE 32.5-38.5 NORTH LONGITUDE 80.5-89.0 WEST FIGURE 2.5-170 EARTHQUAKE LISTING 4.3 RICHTER OR GREATER LATITUDE 32.5-38.5 NORTH LONGITUDE 80.5-89.0 WEST FIGURE 2.5-171 EARTHQUAKE LISTING 4.3 RICHTER OR GREATER LATITUDE 32.5-38.5 NORTH LONGITUDE 80.5-89.0 WEST FIGURE 2.5-172 EARTHQUAKE LISTING 4.3 RICHTER OR GREATER LATITUDE 32.5-38.5 NORTH LONGITUDE 80.5-89.0 WEST FIGURE 2.5-173 INDEX MAP -EARTHQUAKES 4.3 RICHTER OR GREATER LATITUDE 30-37 NORTH LONGITUDE 78-92 WEST FIGURE 2.5-174 EARTHQUAKES LISTING 4.3 RICHTER OR GREATER LATITUDE 30-37 NORTH LONGITUDE 78-92 WEST FIGURE 2.5-175 EARTHQUAKES LISTING 4.3 RICHTER OR GREATER LATITUDE 30-37 NORTH LONGITUDE 78-92 WEST FIGURE 2.5-176 EARTHQUAKES LISTING 4.3 RICHTER OR GREATER LATITUDE 30-37 NORTH LONGITUDE 78-92 WEST FIGURE 2.5-177 EARTHQUAKES LISTING 4.3 RICHTER OR GREATER LATITUDE 30-37 NORTH LONGITUDE 78-92 WEST FIGURE 2.5-178 EARTHQUAKES LISTING 4.3 RICHTER OR GREATER LATITUDE 30-37 NORTH LONGITUDE 78-92 WEST FIGURE 2.5-179 EARTHQUAKES LISTING 4.3 RICHTER OR GREATER LATITUDE 30-37 NORTH LONGITUDE 78-92 WEST List of Figures 2-xxxix

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-180 EARTHQUAKES LISTING 4.3 RICHTER OR GREATER LATITUDE 30-37 NORTH LONGITUDE 78-92 WEST FIGURE 2.5-181 INDEX MAP -EARTHQUAKES 6.3 RICHTER OR GREATER LATITUDE 30-37 NORTH LONGITUDE 78-92 WEST FIGURE 2.5-182 EARTHQUAKES LISTING 6.3 RICHTER OR GREATER LATITUDE 30-37 LONGITUDE 78-92 WEST FIGURE 2.5-183 EARTHQUAKE LISTING LIST OF REFERENCES FIGURE 2.5-184 EARTHQUAKE LISTING NOTES FIGURE 2.5-185 YARD SOIL BORINGS LOCATION PLAN FIGURE 2.5-185A YARD SOIL BORINGS LOCATION PLAN FIGURE 2.5-186 TRANSFORMER YARD & SWITCHYARD SOIL INVESTIGATION FIGURE 2.5-187 COOLING TOWERS SOIL INVESTIGATION FIGURE 2.5-188 PUMPING STATION FOUNDATION INVESTIGATION FIGURE 2.5-189 OFFICE & SERVICE BUILDING FOUNDATION INVESTIGATION FIGURE 2.5-190 DIESEL GENERATOR BUILDING SECTIONS AA & BB FOUNDATION INVESTIGATION FIGURE 2.5-191 ESSENTIAL COOLING WATER SUPPLY SOIL INVESTIGATION FIGURE 2.5-192 INTAKE CHANNEL, SECTION DD FOUNDATION INVESTIGATION FIGURE 2.5-193 INTAKE CHANNEL, SECTION EE FOUNDATION INVESTIGATION FIGURE 2.5-194 INTAKE CHANNEL, SECTION CC FOUNDATION INVESTIGATION FIGURE 2.5-195 INTAKE CHANNEL, SECTION FF FOUNDATION INVESTIGATION FIGURE 2.5-196 CLASS IE CONDUITS SOIL INVESTIGATION FIGURE 2.5-197 CLASS IE CONDUITS SOIL INVESTIGATION FIGURE 2.5-198 SOIL INVESTIGATION BORINGS FOR ERCW & HPFP SYSTEMS FIGURE 2.5-199 SOIL INVESTIGATION BORINGS FOR ERCW & HPFP SYSTEMS FIGURE 2.5-200 SOIL INVESTIGATION BORINGS FOR ERCW & HPFP SYSTEMS FIGURE 2.5-201 SOIL INVESTIGATION BORINGS FOR ERCW & HPFP SYSTEMS FIGURE 2.5-202 SOIL INVESTIGATION BORINGS FOR ERCW & HPFP SYSTEMS FIGURE 2.5-203 INTAKE CHANNEL TRENCH FIGURE 2.5-204 INTAKE CHANNEL TEST 1 2-xl List of Figures

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-205 INTAKE CHANNEL STRENGTH EVALUATION TEST 2 FIGURE 2.5-206 CLASS IE CONDUIT ALIGNMENT Q (UNCONSOLIDATED, UNDRAINED, UNDISTURBED) SAMPLES.

FIGURE 2.5-207 ERCW PIPING AND IE CONDUIT ALIGNMENTS R (CONSOLIDATED - UNDRAINED) SILT AND CLAY SAMPLES NATURAL MOISTURE CONTENT FIGURE 2.5-208 CLASS IE CONDUIT ALIGNMENT S-DIRECT SHEAR FIGURE 2.5-209 TYPE 1-SOFT SHALE TYPE 2-HARD SHALE -TYPE 3 LIMESTONE FIGURE 2.5-210 LOCATION OF TEST HOLES FIGURE 2.5-211 DEFORMATION MODULI FROM MENARD PRESSUREMETER TESTS FIGURE 2.5-212 COMPARISON OF MODULI OBTAINED WITH MENARD PRESSUREMETER AND BIRDWELL 3D SONIC LOGGER FIGURE 2.5-213 INFLUENCE FACTORS FOR DETERMINING STRESSES BELOW THE CENTER OF FLEXIBLE CIRCULAR FOOTING 10, 50, 100, AND 200 FT. IN DIAMETER FIGURE 2.5-214 EIA FOR HOLES TESTED WITH MENARD PRESSUREMETER FIGURE 2.5-215 SETTLEMENT AT CENTER OF FLEXIBLE CIRCULAR FOOTING LOADED WITH SKSF FIGURE 2.5-216 CORRELATION USED TO ESTIMATE AVERAGE MODULI FOR HOLES WHERE DETAILED CALCULATIONS WERE NOT MADE.

FIGURE 2.5-217 DISTRIBUTION OF DEFORMATION MODULI FOR 10 FOOT DIAMETER FOOTINGS FIGURE 2.5-218 SIMPLIFIED PLAN OF LOCK FOUNDATION SHOWING LOCATION OF MODULUS CALCULATIONS FIGURE 2.5-219 SETTLEMENT OF FACE OF BLOCK R-10 (POINT F, FIG. 16)

FIGURE 2.5-220 YARD SOIL INVESTIGATIONS BORROW SOILS FIGURE 2.5-221 YARD SOIL INVESTIGATIONS BORROW SOILS FIGURE 2.5-221A YARD SOIL INVESTIGATIONS BORROW SOILS FIGURE 2.5-222 BORROW INVESTIGATION (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-223 ADDITIONAL BORROW EXPLORATION FIGURE 2.5-224 ADDITIONAL BORROW AREA 4 FIGURE 2.5-225 MAIN PLANT EXCAVATION & BACKFILL CATEGORY I STRUCTURES List of Figures 2-xli

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-226 MAIN PLANT EXCAVATION & BACKFILL CATEGORY I STRUCTURES FIGURE 2.5-226A EXCAVATION AND BACKFILL CATEGORY I STRUCTURES FIGURE 2.5-227 TYPICAL IN-SITU SOIL DYNAMICS MEASUREMENTS LAYOUT & SECTION FIGURE 2.5-228 SOIL DYNAMICS INTAKE CHANNEL STATION 13 + 26E, 21 +

L2S FIGURE 2.5-229 SOIL DYNAMICS INTAKE CHANNEL STATION 14 + 27E, 24 +

L2S FIGURE 2.5-230 SOIL DYNAMICS INTAKE CHANNEL STATION 12 + 67E, 25 +

32S FIGURE 2.5-231 SOIL DYNAMICS INTAKE CHANNEL STATION 10 + 07E, 23 +

53S FIGURE 2.5-232 SEISMIC REFRACTION DYNAMIC PROPERTIES INTAKE CHANNEL FIGURE 2.5-233 SOIL DYNAMICS DIESEL GENERATOR BUILDING DOWN HOLE SEISMIC 8 REFRACTION MEASUREMENT FIGURE 2.5-233A CLASS A BACKFILL -SHEAR MODULUS REDUCTION WITH SHEAR STRAIN FIGURE 2.5-233B CLASS A BACKFILL -DAMPING RATIO VARIATION WITH SHEAR STRAIN FIGURE 2.5-233C CRUSHED STONE BACKFILL - SHEAR MODULUS REDUCTION WITH SHEAR STRAIN FIGURE 2.5-233D CRUSHED STONE BACKFILL - DAMPING RATIO VARIATION WITH SHEAR STRAIN FIGURE 2.5-233E IN SITU COHESIVE SOILS - SHEAR MODULUS REDUCTION WITH SHEAR STRAIN FIGURE 2.5-233F IN SITU COHESIVE SOILS - DAMPING RATIO VARIATION WITH SHEAR STRAIN FIGURE 2.5-233G NON-PLASTIC IN SITU SOIL - SHEAR MODULUS REDUCTION WITH SHEAR STRAIN FIGURE 2.5-233H NON-PLASTIC IN SITU SOILS - DAMPING RATIO VARIATION WITH SHEAR STRAIN FIGURE 2.5-233I BASAL GRAVEL - SHEAR MODULUS REDUCTION WITH SHEAR STRAIN FIGURE 2.5-233J BASAL GRAVEL - DAMPING RATIO VARIATION WITH SHEAR STRAIN 2-xlii List of Figures

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-233K WEATHERED SHALE - SHEAR MODULUS AND DAMPING VARIATION WITH SHEAR STRAIN FIGURE 2.5-234 MAIN PLANT BORROW AREAS, MOISTURE - PENETRATION TEST FIGURE 2.5-235 COMPACTION TEST BORROW AREAS (FAMILY OF CURVES)

FIGURE 2.5-236A OPERATING BASIS EARTHQUAKE RESPONSE SPECTRA FOR ROCK SUPPORT STRUCTURES FIGURE 2.5-236B SAFE SHUTDOWN EARTHQUAKE RESPONSE SPECTRA FOR ROCK SUPPORT STRUCTURES FIGURE 2.5-237 INTAKE CHANNEL SEISMIC STABILITY ANALYSIS FIGURE 2.5-238 STATIC DESIGN CASE 2 FIGURE 2.5-239 INTAKE CHANNEL-LATERAL EXCAVATION &

REPLACEMENT FIGURE 2.5-240 WEDGE USED TO DETERMINE HORIZONTAL DISPLACEMENT OF THE INTAKE CHANNEL BY NEWMARK'S METHOD FIGURE 2.5-241 ERCW PIPING ALIGNMENT Q (UNCONSOLIDATED UNDRAINED - UNDISTURBED SAMPLES)

FIGURE 2.5-242 ERCW PIPING ALIGNMENT S (DIRECT SHEAR) UNDISTURBED SAMPLES FIGURE 2.5-243 DELETED BY AMENDMENT 71 FIGURE 2.5-244 BORROW AREA 4 Q - (UNCONSOLIDATED - UNDRAINED) 95%

STD PROCTOR DENSITY 3% ABOVE OPTIMUM MOISTURE REMOLDED SAMPLES FIGURE 2.5-245 WATTS BAR NUCLEAR PLANT BORROW AREA 4R -

(CONSOLIDATE UNDRAINED) 95% STD PROCTOR DENSITY 3% BELOW OPTIMUM MOISTURE REMOLDED SAMPLES FIGURE 2.5-246 BORROW AREA 4 S -(DIRECT SHEAR) 95% STD PROCTOR DENSITY 3% BELOW OPTIMUM MOISTURE REMOLDED SAMPLES FIGURE 2.5-247 INTAKE CHANNEL Q - (UNCONSOLIDATED - UNDRAINED -

UNDISTURBED SAMPLES) SILTY SANDS FIGURE 2.5-248 INTAKE CHANNEL Q - (UNCONSOLIDATED-UNDRAINED)

UNDISTURDED SAMPLES LEAN CLAYS FIGURE 2.5-249 INTAKE CHANNEL R - (CONSOLIDATED-UNDRAINED)

UNDISTURBED SAMPLES SILTY SANDS FIGURE 2.5-250 INTAKE CHANNEL R - (CONSOLIDATED-UNDRAINED) -

UNDISTURBED SAMPLES LEAN CLAYS List of Figures 2-xliii

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-251 INTAKE CHANNEL Q - (UNCONSOLIDATED UNDRAINED)

REMOLDED SAMPLES 95% SDT PROCTOR DENSITY 4%

ABOVE OPTIMUM MOISTURE FIGURE 2.5-252 SITE STUDIES INTAKE CHANNEL ADDITIONAL SOILS INVESTIGATION FIGURE 2.5-253 INTAKE CHANNEL ADDITIONAL SOIL INVESTIGATION SECTION AA FIGURE 2.5-254 INTAKE CHANNEL ADDITIONAL SOIL INVESTIGATION SECTION BB FIGURE 2.5-255 INTAKE CHANNEL ADDITIONAL SOIL INVESTIGATION SECTION CC FIGURE 2.5-256 INTAKE CHANNEL - LATERAL EXCAVATION AND REPLACEMENT DOWNSTREAM SIDE OF INTAKE CHANNEL WITH BEDROCK AT 656 FIGURE 2.5-257 INTAKE CHANNEL - LATERAL EXCAVATION AND REPLACEMENT DOWNSTREAM SIDE OF INTAKE CHANNEL WITH BEDROCK AT 650 FIGURE 2.5-258 INTAKE CHANNEL - LATERAL EXCAVATION AND REPLACEMENT UPSTREAM RESERVOIR END WITH ROCKFILL PLACED AT 665 FIGURE 2.5-259 INTAKE CHANNEL - LATERAL EXCAVATION AND REPLACEMENT DOWNSTREAM RESERVOIR END WITH ROCKFILL PLACED AT EL. 650 FIGURE 2.5-260 SOIL PROFILE - BORROW AREA 7, BORING PAH-1 FIGURE 2.5-261 SOIL PROFILE - BORROW AREA 7, BORING PAH-2 FIGURE 2.5-262 SOIL PROFILE - BORROW AREA 7, BORING PAH-3 FIGURE 2.5-263 SOIL PROFILE - BORROW AREA 7, BORING PAH-4 FIGURE 2.5-264 SOIL PROFILE - BORROW AREA 7, BORING PAH-5 FIGURE 2.5-265 SOIL PROFILE - BORROW AREA 7, BORING PAH-6 FIGURE 2.5-266 SOIL PROFILE - BORROW AREA 7, BORING PAH-7 FIGURE 2.5-267 SOIL PROFILE - BORROW AREA 7, BORING PAH-8 FIGURE 2.5-268 SOIL PROFILE - BORROW AREA 7, BORING PAH-9 (SS, PA, HA, TP, BORING)

FIGURE 2.5-269 SOIL PROFILE - BORROW AREA 7, BORING PAH-10 FIGURE 2.5-270 SOIL PROFILE - BORROW AREA 7, BORING PAH-11 FIGURE 2.5-271 COMPACTION TEST (FAMILY OF CURVES) - BORROW AREA 7 FIGURE 2.5-272 MOISTURE - PENETRATION TEST - BORROW AREA 7 2-xliv List of Figures

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-273 YARD CATEGORY I ERCW PIPING AND CONDUITS PLAN FIGURE 2.5-274 SOIL PROFILE (SS, PA, HA, TP, BORING) 1E CONDUIT BANKS FIGURE 2.5-275 SOIL PROFILE (SS, PA, HA, TP, BORING) 1E CONDUIT BANKS FIGURE 2.5-276 SOIL PROFILE (SS, PA, HA, TP, BORING) IE CONDUIT BANKS SHEET 1 OF 2 FIGURE 2.5-276 SOIL PROFILE (SS, PA, HA, TP, BORING) ID CONDUIT BANKS SHEET 2 OF 2 FIGURE 2.5-277 SOIL PROFILE (SS, PA, HA, TP, BORING) ID CONDUIT BANKS FIGURE 2.5-278 SOIL PROFILE (SS, PA, HA, TP, BORING) ID CONDUIT BANKS FIGURE 2.5-279 SOIL PROFILE (SS, PA, HA, TP, BORING) ID CONDUIT BANKS FIGURE 2.5-280 SOIL PROFILE (SS, PA, HA, TP, BORING) ID CONDUIT BANKS FIGURE 2.5-281 (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

(SHEET 1 OF 2)

FIGURE 2.5-281 (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

(SHEET 2 OF 2)

FIGURE 2.5-282 SOIL PROFILE FIGURE 2.5-283 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-283 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-284 SOIL PROFILE FIGURE 2.5-285 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-285 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-286 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-286 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-287 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-287 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-288 SOIL PROFILE FIGURE 2.5-289 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-289 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-290 SOIL PROFILE FIGURE 2.5-291 SOIL PROFILE FIGURE 2.5-292 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-292 SOIL PROFILE (SHEET 2 OF 2 FIGURE 2.5-293 SOIL PROFILE FIGURE 2.5-294 SOIL PROFILE (SHEET 1 OF 2)

List of Figures 2-xlv

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-294 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-295 SOIL PROFILE FIGURE 2.5-296 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-296 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-297 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-297 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-298 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-298 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-299 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-299 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-300 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-300 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-301 SOIL PROFILE FIGURE 2.5-302 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-302 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-303 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-303 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-304 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-304 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-305 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-305 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-306 SOIL PROFILE FIGURE 2.5-307 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-307 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-308 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-308 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-309 SOIL PROFILE FIGURE 2.5-310 SOIL PROFILE FIGURE 2.5-311 SOIL PROFILE FIGURE 2.5-312 SOIL PROFILE FIGURE 2.5-313 SOIL PROFILE FIGURE 2.5-314 SOIL PROFILE FIGURE 2.5-315 SOIL PROFILE 2-xlvi List of Figures

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-316 SOIL PROFILE (SHEET 1 OF 1)

FIGURE 2.5-317 SOIL PROFILE FIGURE 2.5-318 SOIL PROFILE FIGURE 2.5-319 SOIL PROFILE FIGURE 2.5-320 SOIL PROFILE FIGURE 2.5-321 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-321 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-322 SOIL PROFILE FIGURE 2.5-323 SOIL PROFILE FIGURE 2.5-324 SOIL PROFILE FIGURE 2.5-325 SOIL PROFILE FIGURE 2.5-326 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-326 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-327 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-327 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-328 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-328 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-329 SOIL PROFILE FIGURE 2.5-330 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-330 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-331 BLANK PAGE FIGURE 2.5-332 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-332 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-333 SOIL PROFILE (SHEET 1OF 2)

FIGURE 2.5-333 SOIL PROFILE (SHEET 2OF 2)

FIGURE 2.5-334 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-334 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-335 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-335 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-336 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-336 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-337 SOIL PROFILE FIGURE 2.5-338 SOIL PROFILE List of Figures 2-xlvii

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-339 ERCW ROUTE LIQUEFACTION EVALUATION GRAPHIC LOGS NO. 50 & 65 FIGURE 2.5-340 ERCW LIQUEFACTION FIGURE 2.5-341 ERCW LIQUEFACTION FIGURE 2.5-342 LIQUEFACTION FIGURE 2.5-343 LIQUEFACTION FIGURE 2.5-344 LIQUEFACTION FIGURE 2.5-345 LIQUEFACTION FIGURE 2.5-346 LIQUEFACTION FIGURE 2.5-347 LIQUEFACTION FIGURE 2.5-348 LIQUEFACTION FIGURE 2.5-349 LIQUEFACTION FIGURE 2.5-350 LIQUEFACTION FIGURE 2.5-351 LIQUEFACTION FIGURE 2.5-352 LIQUEFACTION FIGURE 2.5-353 RESULTS OF STRESS CONTROLLED CYCLIC TRIAXIAL TESTS ON ERCW ROUTE SOILS FIGURE 2.5-354 LIQUEFACTION STUDY ERCW PIPELINE FIGURE 2.5-355 LIQUEFACTION STUDY ERCW PIPELINE FIGURE 2.5-356 LIQUEFACTION STUDY ERCW PIPELINE FIGURE 2.5-357 LIQUEFACTION STUDY ERCW PIPELINE FIGURE 2.5-358 ADDITIONAL SOIL INVESTIGATIONS CATEGORY I SOIL SUPPORTED STRUCTURES FIGURE 2.5-359 CATEGORY I SOIL SUPPORTED STRUCTURES SOIL INVESTIGATION FIGURE 2.5-360 CATEGORY I SOIL SUPPORTED STRUCTURES SOIL INVESTIGATION FIGURE 2.5-361 CATEGORY I SOIL SUPPORTED STRUCTURES SOIL INVESTIGATION FIGURE 2.5-362 CATEGORY I SOIL SUPPORTED STRUCTURES SOIL INVESTIGATION FIGURE 2.5-363 CATEGORY I SOIL SUPPORTED STRUCTURES SOIL INVESTIGATION FIGURE 2.5-364 CATEGORY I SOIL SUPPORTED STRUCTURES SOIL INVESTIGATION 2-xlviii List of Figures

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-365 CATEGORY I SUPPORTED STRUCTURES S-DIRECT SHEAR TEST REMOLDED BASAL GRAVEL FIGURE 2.5-366 SOIL SUPPORTED STRUCTURES FIGURE 2.5-367 SOIL SUPPORTED STRUCTURES FIGURE 2.5-368 SOIL SUPPORTED STRUCTURES FIGURE 2.5-369 SOIL SUPPORTED STRUCTURES FIGURE 2.5-370 SOIL SUPPORTED STRUCTURES FIGURE 2.5-371 SOIL SUPPORTED STRUCTURES FIGURE 2.5-372 GRAVEL BORING NO. 125 FIGURE 2.5-373 GRAVEL BORING NO. 129 FIGURE 2.5-374 WATTS BAR NUCLEAR PLANT CATEGORY I SOIL SUPPORTED STRUCTURES Q - ( UNCONSOLIDATED - UNDRAINED)

TEST FINE GRAINED SOILS (UNDISTURBED SAMPLES)

FIGURE 2.5-375 WATTS BAR NUCLEAR PLANT CATEGORY I SOIL SUPPORTED STRUCTURES R (TOTAL) - ( CONSOLIDATED - UNDRAINED)

TEST FINE GRAINED SOILS (UNDISTURBED SAMPLES)

FIGURE 2.5-376 WATTS BAR NUCLEAR PLANT CATEGORY I SOIL SUPPORTED STRUCTURE R (EFFECTIVE) -

(CONSOLIDATED -UNDRAINED) TEST FINE GRAINED SOILS (UNDISTURBED SAMPLES)

FIGURE 2.5-377 SOIL PROFILE FIGURE 2.5-378 SOIL PROFILE FIGURE 2.5-379 SOIL PROFILE FIGURE 2.5-380 SOIL PROFILE FIGURE 2.5-381 SOIL PROFILE FIGURE 2.5-382 SOIL PROFILE FIGURE 2.5-383 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-383 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-384 SOIL PROFILE (SHEET 1 OF 2)

FIGURE 2.5-384 SOIL PROFILE (SHEET 2 OF 2)

FIGURE 2.5-385 SOIL PROFILE FIGURE 2.5-386 SOIL PROFILE List of Figures 2-xlix

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-387 SOIL PROFILE FIGURE 2.5-388 SOIL PROFILE FIGURE 2.5-389 SOIL PROFILE FIGURE 2.5-390 SOIL PROFILE FIGURE 2.5-391A SOIL PROFILE FIGURE 2.5-392 SOIL PROFILE FIGURE 2.5-393 SOIL PROFILE FIGURE 2.5-394 SOIL PROFILE FIGURE 2.5-395 SOIL PROFILE FIGURE 2.5-396 SOIL PROFILE FIGURE 2.5-397 SOIL PROFILE FIGURE 2.5-398 SOIL PROFILE FIGURE 2.5-399 SOIL PROFILE FIGURE 2.5-400 SOIL PROFILE FIGURE 2.5-401 SOIL PROFILE FIGURE 2.5-402 SOIL PROFILE FIGURE 2.5-403 SOIL PROFILE FIGURE 2.5-404 SOIL PROFILE FIGURE 2.5-405 SOIL PROFILE FIGURE 2.5-406 SOIL PROFILE FIGURE 2.5-407 SOIL PROFILE FIGURE 2.5-408 SOIL PROFILE FIGURE 2.5-409 SOIL PROFILE FIGURE 2.5-410 SOIL PROFILE FIGURE 2.5-411 SOIL PROFILE FIGURE 2.5-412 SOIL PROFILE FIGURE 2.5-413 SOIL PROFILE FIGURE 2.5-414 SOIL PROFILE FIGURE 2.5-415 SOIL PROFILE FIGURE 2.5-416 SOIL PROFILE FIGURE 2.5-417 SOIL PROFILE FIGURE 2.5-418 SOIL PROFILE FIGURE 2.5-419 SOIL PROFILE 2-l List of Figures

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-420 SOIL PROFILE FIGURE 2.5-421 SOIL PROFILE FIGURE 2.5-422 SOIL PROFILE FIGURE 2.5-423 SOIL PROFILE FIGURE 2.5-424 SOIL PROFILE FIGURE 2.5-425 SOIL PROFILE FIGURE 2.5-426 SOIL PROFILE FIGURE 2.5-427 SOIL PROFILE FIGURE 2.5-428 SOIL PROFILE FIGURE 2.5-429 SOIL PROFILE FIGURE 2.5-430 SOIL PROFILE FIGURE 2.5-431 SOIL PROFILE FIGURE 2.5-432 SOIL PROFILE FIGURE 2.5-433 SOIL PROFILE FIGURE 2.5-434 SOIL PROFILE FIGURE 2.5-435 SOIL PROFILE FIGURE 2.5-436 SOIL PROFILE FIGURE 2.5-437 SOIL PROFILE FIGURE 2.5-438 SOIL PROFILE FIGURE 2.5-439 SOIL PROFILE FIGURE 2.5-440 SOIL PROFILE FIGURE 2.5-441 SOIL PROFILE FIGURE 2.5-442 SOIL PROFILE FIGURE 2.5-443 SOIL PROFILE FIGURE 2.5-444 SOIL PROFILE FIGURE 2.5-445 SOIL PROFILE FIGURE 2.5-446 SOIL PROFILE FIGURE 2.5-447 SOIL PROFILE FIGURE 2.5-448 SOIL PROFILE FIGURE 2.5-449 SOIL PROFILE FIGURE 2.5-450 SOIL PROFILE FIGURE 2.5-451 SOIL PROFILE FIGURE 2.5-452 SOIL PROFILE List of Figures 2-li

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-453 SOIL PROFILE FIGURE 2.5-454 SOIL PROFILE FIGURE 2.5-455 SOIL PROFILE FIGURE 2.5-456 SOIL PROFILE FIGURE 2.5-457 SOIL PROFILE FIGURE 2.5-458 SOIL PROFILE FIGURE 2.5-459 SOIL PROFILE FIGURE 2.5-460 SOIL PROFILE FIGURE 2.5-461 SOIL PROFILE FIGURE 2.5-462 SOIL PROFILE FIGURE 2.5-463 SOIL PROFILE FIGURE 2.5-464 SOIL PROFILE FIGURE 2.5-465 SOIL PROFILE FIGURE 2.5-466 SOIL PROFILE FIGURE 2.5-467 SOIL PROFILE FIGURE 2.5-468 SOIL PROFILE FIGURE 2.5-469 SOIL PROFILE FIGURE 2.5-470 SOIL PROFILE FIGURE 2.5-471 SOIL PROFILE FIGURE 2.5-472 SOIL PROFILE FIGURE 2.5-473 SOIL PROFILE FIGURE 2.5-474 SOIL PROFILE FIGURE 2.5-475 SOIL PROFILE FIGURE 2.5-476 SOIL PROFILE FIGURE 2.5-477 SOIL PROFILE FIGURE 2.5-478 SOIL PROFILE FIGURE 2.5-479 SOIL PROFILE FIGURE 2.5-480 SOIL PROFILE FIGURE 2.5-481 SOIL PROFILE FIGURE 2.5-482 SOIL PROFILE FIGURE 2.5-483 SOIL PROFILE FIGURE 2.5-484 SOIL PROFILE FIGURE 2.5-485 SOIL PROFILE 2-lii List of Figures

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-486 SOIL PROFILE FIGURE 2.5-487 SOIL PROFILE FIGURE 2.5-488 SOIL PROFILE FIGURE 2.5-489 SOIL PROFILE FIGURE 2.5-490 SOIL PROFILE FIGURE 2.5-491 SOIL PROFILE FIGURE 2.5-492 SOIL PROFILE FIGURE 2.5-493 SOIL PROFILE FIGURE 2.5-494 SOIL PROFILE FIGURE 2.5-495 SOIL PROFILE FIGURE 2.5-496 SOIL PROFILE FIGURE 2.5-497 SOIL PROFILE FIGURE 2.5-498 SOIL PROFILE FIGURE 2.5-499 SOIL PROFILE FIGURE 2.5-500 SOIL PROFILE FIGURE 2.5-501 SOIL PROFILE FIGURE 2.5-502 SOIL PROFILE FIGURE 2.5-503 SOIL PROFILE FIGURE 2.5-504 SOIL PROFILE FIGURE 2.5-505 SOIL PROFILE FIGURE 2.5-506 SOIL PROFILE FIGURE 2.5-507 SOIL PROFILE FIGURE 2.5-508 SOIL PROFILE FIGURE 2.5-509 SOIL PROFILE FIGURE 2.5-510 SOIL PROFILE FIGURE 2.5-511 SOIL PROFILE FIGURE 2.5-512 SOIL PROFILE FIGURE 2.5-513 SOIL PROFILE FIGURE 2.5-514 SOIL PROFILE FIGURE 2.5-515 SOIL PROFILE FIGURE 2.5-516 SOIL PROFILE FIGURE 2.5-517 SOIL PROFILE FIGURE 2.5-518 SOIL PROFILE List of Figures 2-liii

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-519 SOIL PROFILE FIGURE 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 FIGURE 2.5-521 WATTS BAR NUCLEAR PLANT UNDERGROUND BARRIER TRENCH A BACKFILL R ( CONSOLIDATED -UNDRAINED) 100% STD PROCTOR DENSITY (ASTM D698) 3% BELOW OPTIMUM MOISTURE CONTENT FIGURE 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 FIGURE 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 FIGURE 2.5-524 ERCW LIQUEFACTION TRENCH A BORROW FIGURE 2.5-525 ERCW LIQUEFACTION TRENCH A SUPPLEMENTAL BORROW FIGURE 2.5-526 ERCW LIQUEFACTION TRENCH B FIGURE 2.5-527 ERCW LIQUEFACTION BORROW AREA 9 FIGURE 2.5-528 ERCW LIQUEFACTION BORROW AREA 10 FIGURE 2.5-529 ERCW LIQUEFACTION BORROW AREA 11 FIGURE 2.5-530 ERCW LIQUEFACTION BORROW AREA 12 FIGURE 2.5-531 ERCW LIQUEFACTION BORROW AREA 13 FIGURE 2.5-532 ERCW LIQUEFACTION BORROW AREA 2C FIGURE 2.5-533 ERCW LIQUEFACTION BORROW AREA 2C FIGURE 2.5-534 ERCW LIQUEFACTION TRENCH A FIGURE 2.5-535 ERCW LIQUEFACTION TRENCH A SUPPLEMENTAL BORROW FIGURE 2.5-536 ERCW LIQUEFACTION TRENCH B FIGURE 2.5-537 ERCW LIQUEFACTION BORROW AREA 9 FIGURE 2.5-538 ERCW LIQUEFACTION BORROW AREA 10 FIGURE 2.5-539 ERCW LIQUEFACTION BORROW AREA 11 FIGURE 2.5-540 ERCW LIQUEFACTION BORROW AREA 12 FIGURE 2.5-541 ERCW LIQUEFACTION BORROW AREA 13 FIGURE 2.5-542 ERCW LIQUEFACTION BORROW AREA 2C 2-liv List of Figures

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-543 ERCW LIQUEFACTION BORROW AREA 2C FIGURE 2.5-544 WATTS BAR NUCLEAR PLANT GRANULAR FILL (1032) Q-(UNCONSOLIDATED-UNDRAINED) 70% RELATIVE DENSITY (ASTM D2049)

FIGURE 2.5-545 WATTS BAR NUCLEAR PLANT GRANULAR FILL (1032) S-DIRECT SHEAR 70% RELATIVE DENSITY (ASTM 02049)

FIGURE 2.5-546 WATTS BAR NUCLEAR PLANT GRANULAR FILL (1032) Q-(UNCONSOLIDATED - UNDRAINED) 80% RELATIVE DENSITY (ASTM D2049)

FIGURE 2.5-547 WATTS BAR NUCLEAR PLANT GRANULAR FILL (1032) R-(CONSOLIDATED-UNDRAINED) S-DIRECT: SHEAR 80%

RELATIVE DENSITY (ASTM D2049)

FIGURE 2.5-548

SUMMARY

. OF GRANULAR FILL TEST DATA -

RELACIVE"DENSITY DIESEL GENERATOR BUILDING FIGURE 2.5-549 ERCW PIPELINE SECTION A-A (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE) (SHEET 1 OF 4)

FIGURE 2.5-549 ERCW PIPELINE SECTION A-A (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE) (SHEET 2 OF 4)

FIGURE 2.5-549 ERCW PIPELINE SECTION A-A (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE) (SHEET 3 OF 4)

FIGURE 2.5-549 ERCW PIPELINE SECTION A-A (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE) (SHEET 4 OF 4)

FIGURE 2.5-550 ERCU PIPELINE SECTION B-B (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-551 ERCU PIPELINE SECTION C-C (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-552 ERCW PIPELINE SECTION D-D FIGURE 2.5-553 ERCW PIPELINE SECTION E-E FIGURE 2.5-554 CATEGORY I ELECTRICAL CONDUITS SECTION F-F (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)(SHEET 1 OF 2)

FIGURE 2.5-554 CATEGORY I ELECTRICAL CONDUITS SECTION F-F (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)(SHEET 2 OF 2)

FIGURE 2.5-555 CATEGORY I ELECTRICAL CONDUITS SECTION G-G (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-556 CATEGORY I ELECTRICAL CONDUITS SECTION H-H (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

List of Figures 2-lv

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-557 CLASS IE CONDUIT FIGURE 2.5-558 CLASS IE CONDUIT FIGURE 2.5-559 CLASS IE CONDUIT FIGURE 2.5-560 CLASS IE CONDUIT FIGURE 2.5-561 CLASS IE CONDUIT FIGURE 2.5-562 CLASS IE CONDUIT FIGURE 2.5-563 CLASS IE CONDUIT FIGURE 2.5-564 ERCU & HPFP SYSTEM FIGURE 2.5-565 ERCU & HPFP SYSTEM FIGURE 2.5-566 INTAKE CHANNEL GRAIN SIZE ANALYSIS FIGURE 2.5-567 ERCW PIPING SYSTEM - GENERALIZED PROFILE TVA DWG NO. 604K1009 RO FIGURE 2.5-568 ERCW PIPING SYSTEM - GENERALIZED PROFILE TVA DWG NO. 604K1010 RO FIGURE 2.5-569 ONE-DIMENSIONAL SOIL PROFILE USED FOR LIQUEFACTION EVALUATION FIGURE 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 FIGURE 2.5-571 ERCW PIPELINE SECTION A-A (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)(SHEET 1 OF 4)

FIGURE 2.5-571 ERCW PIPELINE SECTION A-A (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)(SHEET 2 OF 4)

FIGURE 2.5-571 ERCW PIPELINE SECTION A-A (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)(SHEET 3 OF 4)

FIGURE 2.5-571 ERCW PIPELINE SECTION A-A (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)(SHEET 4 OF 4)

FIGURE 2.5-572 ERCW PIPELINE SECTION B-B FIGURE 2.5-573 (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-574 ERCW PIPELINE SECTION D-D FIGURE 2.5-575 ERCW PIPELINE SECTION E-E 2-lvi List of Figures

WATTS BAR LIST OF FIGURES Section Title FIGURE 2.5-576 CATEGORY I ELECTRICAL CONDUITS SECTION F-F (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)(SHEET 1 OF 2)

FIGURE 2.5-576 CATEGORY I ELECTRICAL CONDUITS SECTION F-F (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)(SHEET 2 OF 2)

FIGURE 2.5-577 CATEGORY I ELECTRICAL CONDUITS SECTION G-G (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-578 CATEGORY I ELECTRICAL CONDUITS SECTION H-H (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-579 MISCELLANEOUS ERCW PIPING AND IE CONDUIT SOIL BORINGS (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-580 YARD UNDERGROUND BARRIERS FOR POTENTIAL SOIL LIQUEFACTION TVA DWGNO. 10N213-1 R1 FIGURE 2.5-581 YARD UNDERGROUND BARRIERS FOR POTENTIAL SOIL LIQUEFACTION TVA DWGNO. 10N213-2 R6 FIGURE 2.5-582 YARD CATEGORY I ERCW PIPING AND CONDUITS - PLAN FIGURE 2.5-583 REMEDIAL TREATMENT FOR POTENTIAL SOIL LIQUEFACTION -STABILITY ANALYSIS

SUMMARY

(ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-584 FINISHED GRADING - UNDERGROUND BARRIER AS-BUILT CROSS-SECTIONS FIGURE 2.5-585 POWERHOUSE -SETTLEMENT STATIONS -BENCH MARK ASSEMBLY FIGURE 2.5-586 SETTLEMENT VS. TIME FOR UNIT 1 REACTOR BUILDING FIGURE 2.5-587 SETTLEMENT VS. TIME FOR UNIT 2 REACTOR BUILDING FIGURE 2.5-588 MAXIMUM SETTLEMENT -AUXILIARY BUILDING SETTLEMENT STATION 10; MINIMUM SETTLEMENT -AUXILIARY BUILDING SETTLEMENT STATION 20 (1973-1982)

(ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 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 List of Figures 2-lvii

WATTS BAR LIST OF FIGURES Section Title SETTLEMENT STATION 4 (1975-1982)

(ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-590 GENERAL LOCATION OF RELATIVE MOVEMENT DETECTORS TVA DWG NO. 10N203-3 R1 FIGURE 2.5-591 WATTS BAR DAM PROBABILITY DISTRIBUTION: NOVEMBER

- MARCH RAINFALL PERIOD 1940 - 1983 FIGURE 2.5-592 YARD ERCW PIPELINE EST. 25-YR HIGH WATER TABLE FIGURE 2.5-593 WATER TABLE PROFILES FIGURE 2.5-594 YARD UNDERGROUND BARRIER TRENCH A STA 1 + 78 (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-595 YARD UNDERGROUND BARRIER TRENCH A STA 3 + 78 (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-596 YARD UNDERGROUND BARRIER TRENCH A STA 5 + 78 (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-597 YARD UNDERGROUND BARRIER TRENCH A STA 7 + 78 (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-598

SUMMARY

OF EARTHFILL TEST DATA - DENSITY FIGURE 2.5-599

SUMMARY

OF EARTHFILL TEST DATA -MOISTURE CONTENT FIGURE 2.5-600

SUMMARY

OF EARTHFILL TEST DATA -DENSITY FIGURE 2.5-601

SUMMARY

OF EARTHFILL TEST DATA -MOISTURE CONTENT FIGURE 2.5-602 YARD UNDERGROUND BARRIER TRENCH B STA 1 + 100 (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-603 YARD UNDERGROUND BARRIER TRENCH B STA 2 + 50 (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-604 YARD UNDERGROUND BARRIER TRENCH B STA 3 + 00 (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-605 YARD UNDERGROUND BARRIER TRENCH B STA 4 + 50 (ACTUAL FIGURE LOCATED IN OVERSIZED FIGURES FILE)

FIGURE 2.5-606

SUMMARY

OF FILL TEST DATA -DENSITY FIGURE 2.5-607

SUMMARY

OF EARTHFILL TEST DATA - MOISTURE CONTENT FIGURE 2.5-608

SUMMARY

OF EARTHFILL TEST DATA -DENSITY FIGURE 2.5-609

SUMMARY

OF EARTHFILL TEST DATA - MOISTURE CONTENT FIGURE 2.5-610

SUMMARY

OF GRANULAR FILL TEST DATA - RELATIVE DENSITY 2-lviii List of Figures

WATTS BAR WBNP-102 2.0 SITE CHARACTERISTICS 2.1 GEOGRAPHY AND DEMOGRAPHY 2.1.1 Site Location and Description 2.1.1.1 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 2.1.1.2 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.

GEOGRAPHY AND DEMOGRAPHY 2.1-1

WATTS BAR WBNP-102 2.1.1.3 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.

2.1.2 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.

2.1.2.1 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.

2.1.2.2 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.

2.1.2.3 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).

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

2.1.3 Population Distribution Historical and projected population information is contained in this section. Both resident and transient populations are included. For 2000, population was based on data from the U.S. Census Bureau, Census of Population, 2000, including block group, block, and census track data. Projections were based on county projections by Woods & Poole.

Economic Analysis Division, Bureau of Economic Analysis, U.S. Department of Commerce, 1992. Subcounty population estimates were prepared using a constant share of the 1990 county total. County Census maps and 1:250,000 topographic maps were used to disegregate sub-county population data into the annular segments.

2.1-2 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 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. School enrollments for 2008 are from the Tennessee Department of Education Report Card 2008 (http://www.state.tn.us/education/). Projected enrollments are based on projected population growth in the respective counties.

2.1.3.1 Population Within 10 Miles About 18,900 people lived within 10 miles of the Watts Bar site in 2000, with more than 75% of them between five and 10 miles from the site. Two small towns, Spring City and Decatur, which in 2007 had populations of 2,002 and 1,456 respectively, are located between five and 10 miles from the site. Decatur is south of the site, while Spring City is northwest and north-northwest. Most of the remainder of the area is sparsely populated, especially within five miles of the site. The pattern is expected to continue.

Tables 2.1-1 through 2.1-7 show the estimated and projected population distribution within ten miles of the site for 2000, 2010, 2020, 2030, 2040, 2050, and 2060. Figure 2.1-3 shows the area within ten miles of the site overlaid by circles and sixteen compass sectors.

2.1.3.2 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 62%,

or 660,000 persons, between 2000 and 2060. About 71% of this total increase is expected to be in the area between 30 and 50 miles from the site.

The largest urban concentration between 10 and 50 miles is the city of Chattanooga, located to the southwest and south-southwest. This city had a population in 2007 of 169,884; about 80% of this population is located between 40 and 50 miles from the site, while the rest is located beyond 50 miles. The city of Knoxville is located to the east-northeast of the site and is slightly larger than Chattanooga. However, only a small share, less than 10 percent, of its population of 183,546, is located between 40 and 50 miles of the site with the remainder beyond 50 miles.

There are three smaller urban concentrations in this area with population greater than 20,000. The city of Oak Ridge, which had a 2007 population of 27,514, is located about 40 miles to the northeast. The twin cities of Alcoa and Maryville, which had a combined population in 2007 of about 35,300, are located between 45 to 50 miles to the east-northeast. Cleveland, with a 2007 population of 39,200, is located about 30 miles to the south. Most of the population growth is expected to occur around these and the larger population centers.

GEOGRAPHY AND DEMOGRAPHY 2.1-3

WATTS BAR WBNP-102 There are, in addition, a number of smaller communities dispersed throughout the area, surrounded by low-density rural areas.

Tables 2.1-8 through 2.1-14 contain the 2000, 2010, 2020, 2030, 2040,2050, and 2060 population distribution at various distances and directions from the site out to 50 miles.

Figure 2.1-2 shows the area within 50 miles of the site overlaid by the circles and 16 compass sectors.

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

There are no major active industrial facilities or other major employers in the vicinity of the plant.

Recreation--Estimated and projected peak hour visitation to recreation facilities within 10 miles of the plant are contained in Tables 2.1-15 through 2.1-21. The visitation is based on the maximum capacity of facilities plus some overflow. Capacities are based on the TVA data base of recreation facilities in the area. There are no recreation facilities beyond 10 miles which are large enough to cause significant variations in the total population within any annular segment.

Schools--Eight schools are currently located within ten miles of Watts Bar Nuclear Plant. In 2008, these schools served 4,155 students, distributed as shown in Table 2.1-22. Enrollments for 2008 are from the Tennessee Department of Education Report Card 2008 (http://www.state.tn.us/education/). Enrollments at these schools are projected based on county population projections by Woods & Poole.

2.1.3.4 Low Population 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 (2976 in 2010) and the population density (105 people per square mile in 2010) are both low. Population includes permanent residents (759) and transients (2217) estimates for 2010.

Transients are "Peak Hour Recreation Visitors". In addition, this area is of such size that in the unlikely event of a serious accident there is a reasonable probability that appropriate measures could be taken to protect the health and safety of the residents.

Specific provisions for the protection of this area are considered in the development of the Watts Bar Nuclear Plant site emergency plan. The present and projected population figures for this area are included in Tables 2.1-1 through 2.1-14. Features of the area within the low population zone distances are shown on Figure 2.1-3.

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

2.1.3.6 Population Density Cumulative population around the site out to 30 miles is plotted on Figures 2.1-20 and 2.1-21 for 2010 and 2060 . Also plotted on Figure 2.1-20 is the cumulative population 2.1-4 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 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 significantly smaller than that based on the uniform population density.

REFERENCES None.

GEOGRAPHY AND DEMOGRAPHY 2.1-5

WATTS BAR WBNP-102 Table 2.1-1 Watts Bar 2000 Population Distribution Within 10 Miles of the Site (Sheet 1 of 1)

DistanceFrom Site (Miles)

Direction 0-1 1-2 2-3 3-4 4-5 5-10 0-10 N 0 9 0 0 66 1,674 1,749 NNE 0 0 9 200 90 862 1,161 NE 0 0 9 150 140 403 702 ENE 0 0 9 150 140 242 541 E 0 4 210 150 300 1,553 2,217 ESE 0 0 0 13 20 377 410 SE 4 0 0 14 19 406 443 SSE 10 0 0 120 201 614 945 S 8 0 0 0 966 1,863 2,837 SSW 0 0 10 0 0 266 276 SW 0 0 0 0 0 727 727 WSW 0 4 25 41 87 492 649 W 0 10 15 70 62 491 648 WNW 0 0 15 87 55 339 496 NW 0 75 230 260 364 1,837 2,766 NNW 0 0 0 120 85 2,156 2,361 TOTAL 22 102 532 1,375 2,595 14,302 18,928 2.1-6 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 Table 2.1-2 Watts Bar 2010 Population Distribution Within 10 Miles Of The Site (Sheet 1 of 1)

Distance From Site Miles Direction 0-1 1-2 2-3 3-4 4-5 5-10 0-10 N 0 10 0 0 73 1,863 1,946 NE 0 0 10 223 100 959 1,292 NE 0 0 11 184 171 494 860 ENE 0 0 11 184 171 296 662 E 0 5 257 184 367 1,902 2,715 ESE 0 0 0 16 24 462 502 SE 5 0 0 17 23 497 542 SSE 12 0 0 147 246 752 1,157 S 10 0 0 0 1,183 2,282 3,475 SSW 0 0 12 0 0 326 338 SW 0 0 0 0 0 809 809 WSW 0 4 28 46 97 548 723 W 0 11 17 78 69 546 721 WNW 0 0 17 97 61 377 552 NW 0 83 256 289 405 2,044 3,077 NNW 0 0 0 134 95 2,399 2,628 TOTAL 27 113 619 1,599 3,085 16,556 21,999 GEOGRAPHY AND DEMOGRAPHY 2.1-7

WATTS BAR WBNP-102 Table 2.1-3 Watts Bar 2020 Population Distribution Within 10 Miles Of The Site (Sheet 1 of 1)

Distance From Site Miles Direction 0-1 1-2 2-3 3-4 4-5 5-10 0-10 N 0 11 0 0 81 2,064 2,157 NNE 0 0 11 247 111 1,063 1,432 NE 0 0 14 235 219 630 1,098 ENE 0 0 14 235 219 379 846 E 0 6 329 235 469 2,430 3,468 ESE 0 0 0 20 31 590 641 SE 6 0 0 22 30 635 693 SSE 16 0 0 188 314 961 1,478 S 13 0 0 0 1,511 2,914 4,438 SSW 0 0 16 0 0 416 432 SW 0 0 0 0 0 896 896 WSW 0 5 31 51 107 607 800 W 0 12 18 86 76 605 799 WNW 0 0 18 107 68 418 612 NW 0 92 284 321 449 2,265 3,411 NNW 0 0 0 148 105 2,658 2,911 TOTAL 35 126 735 1,895 3,790 19,531 26,112 2.1-8 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 Table 2.1-4 Watts Bar 2030 Population Distribution Within 10 Miles Of The Site (Sheet 1 of 1)

Distance From Site Miles Direction 0-1 1-2 2-3 3-4 4-5 5-10 0-10 N 0 12 0 0 90 2,284 2,386 NNE 0 0 12 273 123 1,176 1,584 NE 0 0 17 287 268 770 1,342 ENE 0 0 17 287 268 463 1,035 E 0 8 401 287 574 2,969 4,239 ESE 0 0 0 25 38 721 784 SE 8 0 0 27 36 776 847 SSE 19 0 0 229 384 1,174 1,806 S 15 0 0 0 1,847 3,561 5,423 SSW 0 0 19 0 0 509 528 SW 0 0 0 0 0 992 992 WSW 0 5 34 56 119 671 885 W 0 14 20 96 85 670 885 WNW 0 0 20 119 75 463 677 NW 0 102 314 355 497 2,507 3,775 NNW 0 0 0 164 116 2,942 3,222 TOTAL 42 141 854 2,205 4,520 22,648 30,410 GEOGRAPHY AND DEMOGRAPHY 2.1-9

WATTS BAR WBNP-102 Table 2.1-5 Watts Bar 2040 Population Distribution Within 10 Miles Of The Site (Sheet 1 of 1)

Distance From Site Miles Direction 0-1 1-2 2-3 3-4 4-5 5-10 0-10 N 0 13 0 0 96 2,432 2,541 NNE 0 0 13 291 131 1,252 1,687 NE 0 0 20 326 304 875 1,525 ENE 0 0 20 326 304 525 1,175 E 0 9 456 326 651 3,370 4,812 ESE 0 0 0 28 43 818 889 SE 9 0 0 30 41 881 961 SSE 22 0 0 260 436 1,333 2,051 S 17 0 0 0 2,096 4,043 6,156 SSW 0 0 22 0 0 577 599 SW 0 0 0 0 0 1,056 1,056 WSW 0 6 36 60 126 715 943 W 0 15 22 102 90 713 942 WNW 0 0 22 126 80 492 720 NW 0 109 334 378 529 2,669 4,019 NNW 0 0 0 174 123 3,132 3,429 TOTAL 48 152 945 2,427 5,050 24,883 33,505 2.1-10 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 Table 2.1-6 Watts Bar 2050 Population Distribution Within 10 Miles Of The Site (Sheet 1 of 1)

Distance From Site Miles Direction 0-1 1-2 2-3 3-4 4-5 5-10 0-10 N 0 14 0 0 103 2,616 2,733 NNE 0 0 14 313 141 1,347 1,815 NE 0 0 22 370 346 995 1,733 ENE 0 0 22 370 346 597 1,335 E 0 10 518 370 740 3,833 5,471 ESE 0 0 0 32 49 931 1,012 SE 10 0 0 35 47 1,002 1,094 SSE 25 0 0 296 496 1,516 2,333 S 20 0 0 0 2,384 4,598 7,002 SSW 0 0 25 0 0 657 682 SW 0 0 0 0 0 1,136 1,136 WSW 0 6 39 64 136 769 1,014 W 0 16 23 109 97 767 1,012 WNW 0 0 23 136 86 530 775 NW 0 117 359 406 569 2,871 4,322 NNW 0 0 0 188 133 3,369 3,690 TOTAL 55 163 1,045 2,689 5,673 27,534 37,159 GEOGRAPHY AND DEMOGRAPHY 2.1-11

WATTS BAR WBNP-102 Table 2.1-7 Watts Bar 2060 Population Distribution Within 10 Miles Of The Site (Sheet 1 of 1)

Distance From Site Miles Direction 0-1 1-2 2-3 3-4 4-5 5-10 0-10 N 0 15 0 0 110 2,800 2,925 NNE 0 0 15 335 151 1,442 1,943 NE 0 0 25 415 387 1,115 1,942 ENE 0 0 25 415 387 669 1,496 E 0 11 581 415 830 4,296 6,133 ESE 0 0 0 36 55 1,043 1,134 SE 11 0 0 39 53 1,123 1,226 SSE 28 0 0 332 556 1,698 2,614 S 22 0 0 0 2,672 5,154 7,848 SSW 0 0 28 0 0 736 764 SW 0 0 0 0 0 1,216 1,216 WSW 0 7 42 69 146 823 1,087 W 0 17 25 117 104 821 1,084 WNW 0 0 25 146 92 567 830 NW 0 125 385 435 609 3,073 4,627 NNW 0 0 0 201 142 3,607 3,950 TOTAL 61 175 1,151 2,955 6,294 30,183 40,819 2.1-12 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 Table 2.1-8 Watts Bar 2000 Population Distribution Within 50 Miles Of The Site (Sheet 1 of 1)

Direction 0-10 10-20 20-30 30-40 40-50 Total N 1,749 1,259 1,602 3,132 4,475 12,217 NNE 1,161 9,604 15,206 10,307 1,790 38,068 NE 702 2,941 13,742 22,022 55,634 95,041 ENE 541 2,493 16,128 36,931 154,413 210,506 E 2,217 7,598 11,798 16,630 23,599 61,842 ESE 410 4,782 13,201 3,306 2,247 23,946 SE 443 15,239 11,527 2,936 3,353 33,498 SSE 945 6,871 10,259 2,397 26,218 46,690 S 2,837 3,164 29,107 38,758 11,403 85,269 SSW 276 2,789 34,031 37,215 92,251 166,562 SW 727 9,365 12,610 52,880 97,063 172,645 WSW 649 8,946 2,067 2,031 2,744 16,437 W 648 2,409 4,083 2,270 4,300 13,710 WNW 496 1,515 3,055 4,424 15,262 24,752 NW 2,766 1,874 10,487 6,066 11,383 32,576 NNW 2,361 900 19,046 6,533 4,450 33,290 TOTAL 18,928 81,749 207,949 247,838 510,585 1,067,049 GEOGRAPHY AND DEMOGRAPHY 2.1-13

WATTS BAR WBNP-102 Table 2.1-9 Watts Bar 2010 Population Distribution Within 50 Miles Of The Site (Sheet 1 of 1)

Direction 0-10 10-20 20-30 30-40 40-50 Total N 1,947 1,499 1,733 3,388 4,841 13,407 NNE 1,292 10,080 15,960 10,818 1,936 40,087 NE 860 3,087 14,423 23,114 60,063 101,547 ENE 663 3,075 19,892 45,550 175,297 244,276 E 2,716 8,191 13,656 19,249 28,719 72,531 ESE 502 5,155 15,280 3,827 2,601 27,365 SE 543 16,1428 13,342 3,398 3,427 37,138 SSE 1,158 7,407 11,059 2,584 29,017 51,225 S 3,475 3,411 32,214 42,895 12,620 94,615 SSW 338 2,867 31,982 38,255 94,830 171,272 SW 809 10,423 12,962 54,358 110,380 188,932 WSW 722 9,956 2,351 2,310 3,120 18,459 W 721 2,601 4,210 2,340 4,433 14,306 WNW 552 1,636 3,150 4,561 16,614 26,513 NW 3,078 2,231 11,416 6,603 12,391 35,720 NNW 2,628 1,072 22,678 7,779 4,929 39,084 TOTAL 22,003 89,118 229,308 271,030 565,218 1,176,677 2.1-14 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 Table 2.1-10 Watts Bar 2020 Population Distribution Within 50 Miles Of The Site (Sheet 1 of 1)

Distance From Site Miles Direction 0-10 10-20 20-30 30-40 40-50 Total N 2,157 1736 1931 3,776 5,395 14,995 NNE 1,432 10,671 16,895 11,452 2,158 42,608 NE 1,098 3,268 15,269 24,469 67,259 111,362 ENE 846 3,696 23,913 54,758 198,719 281,932 E 3,468 8,684 14,840 20,918 34,692 82,602 ESE 641 5,465 16,605 4,158 2,826 29,696 SE 693 17,416 14,499 3,693 3,630 39,931 SSE 1,478 7,853 11,725 2,739 32,182 55,978 S 4,438 3,616 35,728 47,575 13,997 105,355 SSW 432 2,979 36,346 39,747 98,527 178,030 SW 896 11,547 13,468 56,477 114,879 197,268 WSW 800 11,031 2,446 2,404 3,248 19,929 W 799 2,773 4,534 2,521 4,775 15,401 WNW 612 1,744 3,392 4,912 17,849 28,509 NW 3,411 2,584 12,265 7,094 13,313 38,666 NNW 2,911 1,241 26,262 9,008 5,293 44,716 TOTAL 26,113 96,304 250,119 295,702 618,741 1,286,979 GEOGRAPHY AND DEMOGRAPHY 2.1-15

WATTS BAR WBNP-102 Table 2.1-11 Watts Bar 2030 Population Distribution Within 50 Miles Of The Site (Sheet 1 of 1)

Direction 0-10 10-20 20-30 30-40 40-50 Total N 2,387 1,990 2,148 4,199 5,999 16,723 NNE 1,584 11,347 17,966 12,178 2,400 45,475 NE 1,342 3,475 16,236 26,019 75,084 122,156 ENE 1,034 4,358 28,195 64,563 244,050 322,200 E 4,238 9,269 16,170 22,793 41,046 93,516 ESE 784 5,834 18,093 4,531 3,080 32,322 SE 847 18,590 15,799 4,024 3,871 43,131 SSE 1,807 8,382 12,515 2,924 35,644 61,272 S 5,423 3,860 39,571 52,692 15,502 117,048 SSW 528 3,124 38,123 41,689 103,342 186,806 SW 992 12,779 14,126 59,238 120,676 207,811 WSW 886 12,207 2,570 2,525 3,412 21,600 W 884 2,975 4,907 2,728 5,167 16,661 WNW 677 1,871 3,671 5,316 19,479 31,014 NW 3,774 2,962 13,385 7,742 14,528 42,391 NNW 3,222 1,422 30,099 10,324 5,715 50,782 TOTAL 30,409 104,445 273,574 323,485 678,995 1,410,908 2.1-16 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 Table 2.1-12 Watts Bar 2040 Population Distribution Within 50 Miles Of The Site (Sheet 1 of 1)

Direction 0-10 10-20 20-30 30-40 40-50 Total N 2,541 2,218 2,281 4,460 6,373 17,873 NNE 1,687 11,747 18,599 12,607 2,549 47,189 NE 1,524 3,597 16,808 26,935 80,896 129,760 ENE 1,174 4,918 31,814 72,849 244,656 355,411 E 4,811 9,773 17,518 24,692 46,384 103,178 ESE 890 6,151 19,601 4,909 3,336 34,887 SE 961 19,601 17,155 4,359 3,985 46,021 SSE 2,051 8,838 13,196 3,083 38,513 65,681 S 6,157 4,070 42,757 56,934 16,750 126,668 SSW 599 3,215 39,231 42,901 106,346 192,292 SW 1,056 13,605 14,537 60,959 127,447 217,604 WSW 943 12,996 2,714 2,667 3,603 22,923 W 941 3,150 4,984 2,771 5,249 17,095 WNW 721 1,981 3,729 5,400 19,945 31,776 NW 4,018 3,302 13,705 8,129 14,875 44,029 NNW 3,430 1,586 33,560 11,512 6,092 56,180 TOTAL 33,504 110,748 292,149 345,167 726,999 1,508,567 GEOGRAPHY AND DEMOGRAPHY 2.1-17

WATTS BAR WBNP-102 Table 2.1-13 Watts Bar 2050 Population Distribution Within 50 Miles Of The Site (Sheet 1 of 1)

Direction 0-10 10-20 20-30 30-40 40-50 Total N 2,733 2,457 2,452 4,795 6,851 19,288 NNE 1,814 12,275 19,435 13,174 2,740 49,438 NE 1,733 3,759 17,564 28,147 87,451 138,654 ENE 1,335 5,522 35,726 81,809 267,271 391,663 E 5,472 10,308 18,878 26,610 52,132 113,400 ESE 1,012 6,488 21,123 5,290 3,569 37,509 SE 1,093 20,674 18,445 4,698 4,151 49,061 SSE 2,333 9,322 13,918 3,252 41,612 70,437 S 7,002 4,293 46,197 61,515 18,098 137,105 SSW 681 3,325 40,575 44,371 109,989 198,941 SW 1,136 14,635 15,035 63,048 134,126 227,980 WSW 1,014 13,980 2,865 2,807 3,792 24,449 W 1,013 3,335 5,204 2,893 5,480 17,925 WNW 775 2,097 3,894 5,638 21,002 33,406 NW 4,323 3,658 14,431 8,560 16,063 47,035 NNW 3,690 1,757 37,176 12,752 6,490 61,865 TOTAL 37,159 117,885 312,909 369,359 780,844 1,618,156 2.1-18 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 Table 2.1-14 Watts Bar 2060 Population Distribution Within 50 Miles Of The Site (Sheet 1 of 1)

Direction 0-10 10-20 20-30 30-40 40-50 Total N 2,926 2,696 2,624 5,129 7,329 20,704 NNE 1,942 12,804 20,272 13,741 2,931 51,690 NE 1,942 3,921 18,320 29,359 94,005 147,547 ENE 1,497 6,127 39,639 90,768 289,886 427,917 E 6,133 10,843 20,239 28,528 57,880 123,623 ESE 1,134 6,824 22,646 5,671 3,855 40,130 SE 1,225 21,748 19,774 5,037 4,317 52,101 SSE 2,614 9,806 14,641 3,421 44,711 75,193 S 7,848 4,515 49,638 66,097 19,446 147,544 SSW 763 3,435 41,919 45,841 113,633 205,591 SW 1,216 15,666 15,533 65,136 140,806 238,357 WSW 1,086 14,965 2,999 2,946 3,981 25,977 W 1,084 3,519 5,424 3,016 5,712 18,755 WNW 830 2,213 4,058 5,877 22,060 35,038 NW 4,627 4,014 15,544 8,991 16,872 50,048 NNW 3,949 1,928 40,792 13,992 6,888 67,549 TOTAL 40,816 125,024 334,062 393,550 834,312 1,727,764 GEOGRAPHY AND DEMOGRAPHY 2.1-19

WATTS BAR WBNP-102 Table 2.1-15 Watts Bar 2009 Estimated Peak Recreation Visitation Within 10 Miles Of The Site (Sheet 1 of 1)

Distance Miles Direction 0-1 1-2 2-3 3-4 4-5 5-10 0-10 N 450 0 0180 0 0 0 630 NNE 130 0 175 0 125 630 1,060 NE 125 0 180 0 1,250 1,702 3,257 ENE 125 125 290 120 120 0 780 E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 115 0 0 140 0 0 255 SSW 0 40 0 0 110 480 630 SW 0 115 110 0 0 115 340 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 2,125 2,125 NNW 0 0 0 0 0 1,032 1,032 TOTAL 945 280 935 260 1,605 6,084 10,109 2.1-20 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 Table 2.1-16 Watts Bar 2010 Estimated Peak Recreation Visitation Within 10 Miles Of The Site (Sheet 1 of 1)

Distance Miles Direction 0-1 1-2 2-3 3-4 4-5 5-10 0-10 N 462 0 185 0 0 0 647 NNE 133 0 180 0 128 646 1,087 NE 128 0 185 0 1,282 1,746 3,341 ENE 128 128 298 123 123 0 800 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 118 0 0 144 0 0 262 SSW 0 41 0 0 113 492 646 SW 0 118 113 0 0 118 349 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 2,180 2,180 NNW 0 0 0 0 0 1,059 1,059 TOTAL 969 287 961 267 1,646 6,241 10,371 GEOGRAPHY AND DEMOGRAPHY 2.1-21

WATTS BAR WBNP-102 Table 2.1-17 Watts Bar 2020 Estimated Peak Recreation Visitation Within 10 Miles Of The Site (Sheet 1 of 1)

Distance Miles Direction 0-1 1-2 2-3 3-4 4-5 5-10 0-10 N 508 0 203 0 0 0 711 NNE 147 0 198 0 141 712 1,198 NE 141 0 203 0 1,412 1,923 3,679 ENE 141 141 328 136 136 0 882 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 130 0 0 158 0 0 288 SSW 0 45 0 0 124 542 711 SW 0 130 124 0 0 130 384 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 2,401 2,401 NNW 0 0 0 0 0 1,166 1,166 TOTAL 1,067 316 1,056 294 1,813 6,874 11,420 2.1-22 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 Table 2.1-18 Watts Bar 2030 Estimated Peak Recreation Visitation Within 10 Miles Of The Site (Sheet 1 of 1)

Distance Miles Direction 0-1 1-2 2-3 3-4 4-5 5-10 0-10 N 560 0 224 0 0 0 784 NNE 162 0 218 0 156 784 1,320 NE 156 0 224 0 1,556 2,119 4,055 ENE 156 156 361 149 149 0 971 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 143 0 0 174 0 0 317 SSW 0 50 0 0 137 598 785 SW 0 143 137 0 0 143 423 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 2,645 2,645 NNW 0 0 0 0 0 1,285 1,285 TOTAL 1,177 349 1,164 323 1,998 7,574 12,585 GEOGRAPHY AND DEMOGRAPHY 2.1-23

WATTS BAR WBNP-102 Table 2.1-19 Watts Bar 2040 Estimated Peak Recreation Visitation Within 10 Miles Of The Site (Sheet 1 of 1)

Distance Miles Direction 0-1 1-2 2-3 3-4 4-5 5-10 0-10 N 581 0 232 0 0 0 813 NNE 168 0 226 0 161 813 1,368 NE 161 0 232 0 1,614 2,197 4,204 ENE 161 161 374 155 155 0 1,006 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 148 0 0 181 0 0 329 SSW 0 52 0 0 142 620 814 SW 0 148 142 0 0 148 438 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 2,743 2,743 NNW 0 0 0 0 0 1,332 1,332 TOTAL 1,219 361 1,206 336 2,072 7,853 13,047 2.1-24 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 Table 2.1-20 Watts Bar 2050 Estimated Peak Recreation Visitation Within 10 Miles Of The Site (Sheet 1 of 1)

Distance Miles Direction 0-1 1-2 2-3 3-4 4-5 5-10 0-10 N 621 0 248 0 0 0 869 NNE 179 0 241 0 172 869 1,461 NE 172 0 248 0 1,724 2,347 4,491 ENE 172 172 400 166 166 0 1,076 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 159 0 0 193 0 0 352 SSW 0 55 0 0 152 662 869 SW 0 159 152 0 0 159 470 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 2,931 2,931 NNW 0 0 0 0 0 1,423 1,423 TOTAL 1,303 386 1,289 359 2,214 8,391 13,942 GEOGRAPHY AND DEMOGRAPHY 2.1-25

WATTS BAR WBNP-102 Table 2.1-21 Watts Bar 2060 Estimated Peak Recreation Visitation Within 10 Miles Of The Site (Sheet 1 of 1)

Distance Miles Direction 0-1 1-2 2-3 3-4 4-5 5-10 0-10 N 661 0 264 0 0 0 925 NNE 191 0 257 0 184 926 1,558 NE 184 0 264 0 1,837 2,501 4,786 ENE 184 184 426 176 176 0 1,146 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 169 0 0 206 0 0 375 SSW 0 59 0 0 162 705 926 SW 0 169 162 0 0 169 500 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 3,122 3,122 NNW 0 0 0 0 0 1,516 1,516 TOTAL 1,389 412 1,373 382 2,359 8,939 14,854 2.1-26 GEOGRAPHY AND DEMOGRAPHY

2.1-27 Table 2.1-22 School Enrollments Within 10 Miles of Watts Bar Nuclear Plant Enrollment WATTS BAR School Name Location 2008 2010 2020 2030 2040 2050 2060 Meigs South Elementary S 5-10 418 442 565 691 784 892 999 Meigs North Elementary S 5-10 437 463 591 772 820 932 1045 Meigs Middle S 5-10 399 422 539 659 748 851 954 Meigs County High S 5-10 534 565 722 882 1001 1139 1276 Rhea County High WSW 5-10 1,405 1,434 1,589 1758 1872 2014 2156 Spring City Elementary NW 5-10 633 646 716 792 843 907 971 Spring City Middle NW 5-10 309 315 349 387 412 443 474 Evensville Center WSW 5-10 20 20 23 25 27 29 31 Total 4,155 4,307 5,094 5,916 6,507 7,207 7,906 GEOGRAPHY AND DEMOGRAPHY WBNP-102

WATTS BAR WBNP-102 THIS PAGE INTENTIONALLY LEFT BLANK 2.1-28 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR GEOGRAPHY AND DEMOGRAPHY Figure 2.1-1 Location of Watts Bar Nuclear Plant Site WBNP-102 2.1-29

WATTS BAR WBNP-102 Figure 2.1-2 Watts Bar Site Location 0-50 Miles 2.1-30 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 Figure 2.1-3 Watts Bar Site Location 0-10 Miles GEOGRAPHY AND DEMOGRAPHY 2.1-31

2.1-32 WATTS BAR Figure 2.1-4a Watts Bar Topographic Map & Reservation Boundary WBNP-102 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR GEOGRAPHY AND DEMOGRAPHY WBNP-102 2.1-33 Figure 2.1-4b Site Boundary / Exclusion Area Boundary

WATTS BAR WBNP-102 Figure 2.1-5 Main Plant General Plan 2.1-34 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 Figure 2.1-6 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY 2.1-35

WATTS BAR WBNP-102 Figure 2.1-7 Deleted by Amendment 63 2.1-36 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 Figure 2.1-8 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY 2.1-37

WATTS BAR WBNP-102 Figure 2.1-9 Deleted by Amendment 63 2.1-38 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 Figure 2.1-10 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY 2.1-39

WATTS BAR WBNP-102 Figure 2.1-11 Deleted by Amendment 63 2.1-40 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 Figure 2.1-12 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY 2.1-41

WATTS BAR WBNP-102 Figure 2.1-13 Deleted by Amendment 63 2.1-42 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 Figure 2.1-14 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY 2.1-43

WATTS BAR WBNP-102 Figure 2.1-15 Deleted by Amendment 63 2.1-44 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 Figure 2.1-16 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY 2.1-45

WATTS BAR WBNP-102 Figure 2.1-17 Deleted by Amendment 63 2.1-46 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 Figure 2.1-18 Deleted by Amendment 63 GEOGRAPHY AND DEMOGRAPHY 2.1-47

WATTS BAR WBNP-102 Figure 2.1-19 Deleted by Amendment 63 2.1-48 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 2010 Cumulative Population Within 30 Miles/500 persons Square Mile 10000000 500/Sq 2010 1000000 100000 Population 10000 1000 100 WATTS BAR NUCLEAR PLANT FINAL SAFETY ANALYSIS REPORT 2010 CUMULATIVE POPULATION WITHIN 30 MILES OF THE SITE FIGURE 2.1-20 10 1 5 10 20 30 Miles Figure 2.1-20 2010 Cumulative Population Within 30 Miles/ 500 persons per Square Mile GEOGRAPHY AND DEMOGRAPHY 2.1-49

WATTS BAR WBNP-102 2060 Cumulative Population Within 30 Miles/1000 persons Square Mile 10000000 1000/Sq 2060 1000000 100000 Population 10000 1000 100 WATTS BAR NUCLEAR PLANT FINAL SAFETY ANALYSIS REPORT 2060 CUMULATIVE POPULATION WITHIN 30 MILES OF THE SITE FIGURE 2.1-21 10 1 5 10 20 30 Miles Figure 2.1-21 2060 Cumulative Population Within 30 Miles/ 1000 persons per Square Mile 2.1-50 GEOGRAPHY AND DEMOGRAPHY

WATTS BAR WBNP-102 2.2 NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES 2.2.1 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. The spur has fallen into disuse and would need to be repaired prior to use.

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

2.2.2 Descriptions 2.2.2.1 Description of 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.

2.2.2.2 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 2002 to 2007 on a yearly basis. Total traffic past the site was 670,716 tons in 2008 compared to 1,294,959 tons in 1990 and to 760,000 tons in 1975.

Traffic on the TVA railroad spur consisted of heavy components for the nuclear plant.

If Watts Bar Steam Plant were reactivated, the spur would also be used for the delivery of heavy components and coal to it.

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

2.2.2.4 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 1500 to 1800 horsepower for this section of the Tennessee River (Chattanooga to NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES 2.2-1

WATTS BAR WBNP-102 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.

2.2.2.5 Airports No airports are located within 10 miles of the site. Mark Anton airport is the nearest, 11 to 12 miles southwest of the site. Its longest runway is 4,500 feet and is hard surfaced. It has no commercial facilities. Lovell Field about 45 miles south-southwest is the nearest airfield with commercial facilities. The annual number of movements per year is about 62,000 for Lovell Field and about 4,000 at Mark Anton of which 1,300 are student pilots executing "touch and go's".

Figures 2.2-1 and 2.2-2 show the plant in relation to civilian and military airways, respectively. Traffic on airway V51 totals fewer than 2,000 flights per year based on 2008 data.

2.2.2.6 Projections of Industrial 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.

2.2.3 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 barge reveals that no potential explosion hazard exists. The worst potential condition for onsite essential safety features other than the intake pumping station arising from an accident involving the products transported near the site (coal, fuel oil, asphalt, tar and pitches) would be the generation of smoke by the burning of these products. The hazard to the Main Control Room from the generation of smoke from these products is covered in Section 6.4.4.2.

Gasoline supply to Knoxville is via pipeline. As specified in Section 2.2.2.3, this pipeline is not in the vacinity of the Watts Bar Nuclear Plant. As of 1974, with the pipeline in full operation, no future gasoline barge shipments past the Watts Bar Nuclear Plant site are expected. The potential for damage to the Watts Bar Nuclear Plant from a gasoline barge explosion is therefore negligible.

Fuel oil is shipped by barge past the Watts Bar Nuclear Plant Site. In case of a fuel oil barge accident, fire and dense smoke may result. Neither fire or dense smoke will effect plant safety, however.

2.2-2 NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES

WATTS BAR WBNP-102 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.

2.2.3.1 References None.

NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES 2.2-3

2.2-4 Table 2.2-1 Waterborne Hazardous Material Traffic (Tons)

(U.S. Army Corps of Engineers) 2002-2007 Sheet 1 of 1) WATTS BAR COMMODITIES 2002 2003 2004 2005 2006 2007 Ammonium Nitrate Fertilizers 3110 Carbon (Including Carbon Black), NEC 15232 7605 1348 1518 Ethyl Alcohol (Not Denatured) 80% or 137147 118594 137464 133412 76993 8947 More Alcohol Fuel Oils, NEC 3400 7209 Lubrication Petroleum Oils from Petrol & 12732 Bitum Mineral Other Light Oils from Petroleum & Bitum 9120 Minerals Petro.Bitumen, Petro.Coke, Asphalt, 1531 12708 25183 11437 3148 71061 Butumen mixes, NEC Petroleum Oils/Oils from Bituminous 6674 Minerals, Crude Pitch & Pitch Coke from Coal Tar/Other 248986 258584 236716 254001 235381 164752 Mineral Tars Vermiculite, Perlite, Chlorites 1642 1643 Grand Total 402896 397491 408863 419774 317165 261089 NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES WBNP-102

WATTS BAR WBNP-102 Table 2.2-2 Deleted by Amendment 94 NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES 2.2-5

WATTS BAR WBNP-102 THIS PAGE IS INTENTIONALLY LEFT BLANK 2.2-6 NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES

Security-Related Information - Withheld Under 10CFR2.390 WATTS BAR WBNP-102 Figure 2.2-1 Airways in the Area of the Plant NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES 2.2-7

Security-Related Information - Withheld Under 10CFR2.390 WATTS BAR WBNP-102 Figure 2.2-2 Military Airways in the Area of the Plant NEARBY INDUSTRIAL, TRANSPORTATION, AND MILITARY FACILITIES 2.2-8

WATTS BAR WBNP-102 2.3 METEOROLOGY 2.3.1 Regional Climate 2.3.1.1 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.

2.3.1.2 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 METEOROLOGY 2.3-1

WATTS BAR WBNP-102 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.

2.3.1.3 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 low. During the period 1950-2009 (when climatological records are fairly complete) there were 38 tornadoes within 30 miles of the Watts Bar site, including 12 tornadoes F3/EF3 or greater [aa,bb].

The probability of a tornado striking the site can be calculated using the following equations according to NUREG/CR-4461, Rev. 2 [cc]. 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) t = mean number of tornadoes per year.

A = area of one-degree latitude, one-degree longitude square = 3887 mi2 for the one-degree square containing the Watts Bar site (84°W to 85°W by 35°N to 36°N).

R = mean recurrence interval for a tornado striking a point in the one- degree square (years).

2.3-2 METEOROLOGY

WATTS BAR WBNP-102 For z = 2.8209 mi2 (from H. C. S. Thom [8]) and t = 1.02 tornadoes per year (55 tornadoes from NUREG/CR-4461 divided by 54 years of record), the probability is 7.40 x 10-4 with a recurrence interval of 1351 years. For consideration in station blackout criteria, the annual expectation of tornadoes with winds exceeding 113 mph (F2/EF2 or greater) is 3.77 x 10-4 per square mile (t = 0.52, based on 28 tornadoes F2 and above 54 years).

Windstorms are relatively infrequent, but may occur several times a year. Strong winds are usually associated with thunderstorms that occur about 50 times per year based on records for Chattanooga and Knoxville (Table 2.3-1). Moderate and occasionally strong winds sometimes accompany migrating cyclones and air mass fronts. Wind records for Chattanooga exist for 1945-2009 (65 years)[dd], for Knoxville during 1943-2009 (67 years)[ee], and for Watts Bar meteorological tower during 1973-2009 (37 years). The extreme wind speed cases have been converted to 3-second gust equivalents for comparison (Table 2.3-1A). The highest observed wind speeds (3-second equivalent) are 102 mph on March 24, 1947 at Chattanooga, 88 mph on July 15, 1961 at Knoxville, and 59 mph on March 25, 1975 at Watts Bar meteorological tower. During 1950-2009, winds > 50 knots (> 57 mph) were reported an average of 16.33 times per year for Rhea County (which contains Watts Bar Nuclear Plant) and the 6 surrounding counties[ff] combined (Table 2.3-1B).

During 1950-2009, hail 3/4 inch in diameter or larger has been reported an average of 6.98 times per year for Rhea County and the 6 surrounding counties[ff] combined (Table 2.3-1B).The likelihood of hail (any size) for a specific location in the area is less than once per year, based on a 52-year record (1879-1930) at Chattanooga and a 60-year record (1871-1930) at Knoxville. [gg]

Annual lightning strike density is estimated to be 7.7 flashes to ground per km2 according to NUREG/CR-3759 [hh]. Based on thunderstorm day frequencies observed at Chattanooga (Table 2.3-1) the seasonal densities of flashes to ground per km2 are estimated to be 0.55 (winter), 2.17 (spring), 4.02 (summer), and 0.96 (fall). These seasonal densities were estimated by calculating the percent of the annual thunderstorm days during the season and multiplying by the annual lightning density value. For example, winter has 3.9 thunderstorm days out of the 55.1 annual total, or 7.1%. Applying 7.1% to the 7.7 annual flashes values results in the 0.55 seasonal flashes value for the winter season.

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 structural features that are subject to freeze damage. The average depth for the 1899 METEOROLOGY 2.3-3

WATTS BAR WBNP-102 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 NWS (1937-2009) show maximum 24-hour and monthly snowfall amounts of 20.0 and 20.0 inches [dd]. Snowfall records for Knoxville NWS (1951-2009) show maximum 24-hour and monthly snowfall amounts of 18.2 and 23.3 inches [ee]. Older records for Knoxville before the NWS station was established show a maximum single storm of 22.5 inches [19]. The total snow load was calculated by assuming that the maximum single snowfall falls on the maximum snowpack. For the Watts Bar Site area, the weight of the 100-year return period snow pack 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 combined weight of the existing snowpack, plus the new snow would be about 31 pounds per square foot on a flat surface. 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.

2.3-4 METEOROLOGY

WATTS BAR WBNP-102 The initial 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) 1psi/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 requirements have been recently updated by NRC. As defined in Regulatory Guide-1.76 (revision 1), the site is located on Region I for Design Basis Tornado considerations [ii]. The design conditions assumed for the Watts Bar Nuclear Plant reactor shield building (and other safety-related structures) are the following:

(1) 184 mph = Rotational Speed (2) 46 mph = Translational Speed (3) 230 mph = Maximum Wind Speed (4) 1.2 psi = Pressure Drop (5) 0.5 psi/sec = Rate of Pressure Drop (1.2 psi/2.4 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.

METEOROLOGY 2.3-5

WATTS BAR WBNP-102 2.3.2 Local Meteorology 2.3.2.1 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, Dayton, 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.

2.3.2.2 Normal and Extreme Values of Meteorological Parameters Temperature data from Dayton [13] and Chattanooga[dd] are presented in Tables 2.3-2 and 2.3-3, respectively. The Chattanooga and Dayton mean daily data are provided as reasonably representative and recent (1971-2000) temperature information.

Normal mean dry-bulb temperatures range from 36.2-39.4°F in the winter to 76.9-79.6°F in the summer. Normal daily maximum temperatures range from 45.9-49.9°F in winter to 87.7-89.6°F in summer. Normal daily minimum temperatures range from 26.5-31.1°F in winter to 66.1-69.0°F in summer. The extreme maxima recorded for the respective data periods (46 years for Dayton and 70 years for Chattanooga) were 107°F at Dayton and 106°F at Chattanooga, while the extreme minima recorded were

-15°F and -10°F, respectively. Temperature data from Decatur (Table 2.3.2), for 60 years prior to data collection at Dayton, reported an extreme maximum temperature of 108°F and an extreme minimum temperature of -20°F.

Precipitation data are presented in Table 2.3-4. These data are from two different rain gauges near Watts Bar Nuclear Plant, one at Watts Bar Dam (1939-1975) and one at the Watts Bar Nuclear Plant meteorological tower (1974-2008). Precipitation has fallen an average of 110-111 days per year, with an annual average of 45.43 inches at the meteorological tower and 52.57 inches at Watts Bar Dam. The maximum monthly rainfall ranged from 6.52 inches to 14.78 inches. The minimum monthly amount was 0,00. The maximum rainfall in 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months was 5.31 inches at Watts Bar Dam in January 1946. The maximum in 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months at the meteorological tower was 4.77 inches on September 17, 1994. Mean monthly data reveal the wettest period as late fall through early spring, with March normally the wettest month of the year. Thunderstorm activity is most predominant in the spring and summer seasons, and the maximum frequency of thunderstorm days (Table 2.3-1) is normally in July.

Appreciable snowfall is relatively infrequent in the area. Snowfall data are summarized in Table 2.3-5 for Dayton[13] and in Table 2.3-6 for Chattanooga[dd] and Knoxville.[ee]

The Dayton, Chattanooga and Knoxville records provide current information and offer a complete picture of the pattern of snowfall in the Tennessee River Valley from Chattanooga to Knoxville. Mean annual snowfall has ranged from 4.4 inches at Dayton to about 10 inches at Knoxville. Dayton, about halfway between those locations, averaged about 4 inches annually for an earlier period of record. Generally, significant snowfalls are limited to November through March. For the data periods presented in the tables, respective 24-hour maximum snowfalls have been 20.0, 8.0, and 18.2 2.3-6 METEOROLOGY

WATTS BAR WBNP-102 inches at Chattanooga, Dayton, and Knoxville. Severe ice storms of freezing rain (or glaze) are infrequent, as discussed in the regional climatology section.

Atmospheric water vapor content is generally rather high in the site area, as was indicated in the discussion of the regional climatology. Long-term relative humidity and absolute humidity data for Chattanooga are presented in Tables 2.3-7 through 2.3-9.[dd,25] The relative humidity for selected hours in Table 2.3-7 has been updated to a more current period of record. Tables 2.3-8 and 2.3-9 cannot be easily updated, but are still valid since the information in Table 2.3-7 show no major changes in humidity characteristics. 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,[dd] Knoxville,[ee] and Oak Ridge,[26] Tennessee, and from Hardwick [27] are presented in Table 2.3-12. These data indicate that heavy fog at the Watts Bar site likely occurs on about 35 days per year with the fall normally the foggiest season. Sources of data on fogs with visibilities significantly less than 1/4 mile and on durations of fogs which can be considered representative of the site have not been identified.

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[ee] 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 0.0122 hours 7.275132e-5 weeks 1.6742e-5 months from the south-southwest direction.

The monthly summaries show some minor variation in the wind direction patterns, but the upvalley-downvalley primary and secondary frequency maxima generally are fully evident.

In the summary tables for 46 meters, the upvalley-downvalley wind direction pattern is very clear and dominant. The two highest frequencies are 19% from the south-southwest wind direction and 11% from the north-northeast wind direction. The maximum wind direction persistence (Table 2.3-16) during the 17-year period was 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months from the south-southwest.

METEOROLOGY 2.3-7

WATTS BAR WBNP-102 Wind speed is normally lower than for most parts of the United States. The other data sources referenced in the discussion of wind direction patterns also reflect this condition. Annually, the onsite data show about 53% of the hourly average wind speeds at 10 meters were less than 3.5 mph and about 85% were less than 7.5 mph.

At 46 meters, the respective frequencies show the wind speeds are relatively lighter in summer and early fall and relatively stronger in late fall, winter, and spring.

Mean mixing height data for the United States have been researched by Holzworth.[16]

However, his analysis has utilized data to estimate morning mixing heights (after sunrise) and mid afternoon mixing heights. Night-time mixing heights are not addressed. Average daily mixing heights are likely to be reasonably similar to the mean morning mixing heights. The seasonal and annual estimates of these mixing heights are the following: winter, about 500 meters; spring, about 530 meters; summer, about 430 meters; fall, about 350 meters; and annual, about 450 meters.

Low-level inversion frequencies in the eastern Tennessee area have been studied by Hosler.[29] His seasonal frequencies indicate inversions in the Watts Bar area about 40% of the time in winter, 30% in spring, 45% in summer, and 45% in fall. The annual frequency is about 40%. The monthly and annual percent frequencies of hours with inversions measured at the Watts Bar onsite meteorological facility for the 20-year 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 30% 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 0.0125 hours 7.440476e-5 weeks 1.71225e-5 months in January 1982 and 42 hours4.861111e-4 days 0.0117 hours 6.944444e-5 weeks 1.5981e-5 months in December 1989. Other long periods, up to 21 hours2.430556e-4 days 0.00583 hours 3.472222e-5 weeks 7.9905e-6 months , 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 0.00389 hours 2.314815e-5 weeks 5.327e-6 months in that time of year. The unusual case of 45 hours5.208333e-4 days 0.0125 hours 7.440476e-5 weeks 1.71225e-5 months 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 0.0117 hours 6.944444e-5 weeks 1.5981e-5 months 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]

2.3-8 METEOROLOGY

WATTS BAR WBNP-102 Distributions of stability classes A-G are presented in Figures 2.3-6A and 2.3-6B. The average diurnal variations of stability class frequencies are quite evident, with the neutral (class D) and unstable (A, B, and C) lapse conditions predominant in the daytime and the stable classes (E, F, and G) predominant through the nighttime.

2.3.2.3 Potential Influence of the Plant and Its 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 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.

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

2.3.3 Onsite Meteorological Measurements Program 2.3.3.1 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 METEOROLOGY 2.3-9

WATTS BAR WBNP-102 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 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 (RG)1.23 (Revision 1) specifications.[36]

2.3-10 METEOROLOGY

WATTS BAR WBNP-102 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 Capacitive humidity sensor.

Rainfall 1 Tipping bucket rain gauge.

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 and a computer. These devices send meteorological data to the plant, to the Central Emergency Control Center (CECC) and to an offsite 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 1.23.

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.

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.

METEOROLOGY 2.3-11

WATTS BAR WBNP-102 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 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, 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, electronics, 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. Procedures and processes such as appropriate maintenance processes (procedures, work order/work request documents, etc.) are used to calibrate and maintain meteorological and station equipment.

2.3.3.2 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. The meteorological program has been developed to be consistent with the guidance given in RG 1.23 (Revision 1) 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 capability of the meteorological facility 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 2.3-12 METEOROLOGY

WATTS BAR WBNP-102 centers are performed each work day. When an outage of one or more of the critical data items occurs, the appropriate maintenance personnel will be notified.

In the event that the onsite meteorological facility is rendered inoperable, or there is an outage of the communication or data access systems; there is no fully representative offsite source of meteorological data for identification of atmospheric dispersion conditions. Therefore, TVA has prepared objective backup procedures to provide estimates for missing or garbled data. These procedures incorporate available onsite data (for a partial loss of data), offsite data, and conditional climatology. The CECC meteorologist will apply the appropriate backup procedures.

2.3.3.3 Onsite Data Summaries of Parameters 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 METEOROLOGY 2.3-13

WATTS BAR WBNP-102 period, but the period is climatologically representative of long-term conditions. An increase in the frequency of 10-meter level calm winds (values less than 0.6 mi/hr) occurred in the early 1990s. The calm wind frequency increased from 1.6% for 1974-1988 to about 3.0% for 1974-1993. Consistent with the increase in calms, average wind speed decreased from 4.2 mi/hr for 1974-1988 to 4.1 mi/hr for 1974-1993.

Potential climate change associated with a global warming of the earth's lower atmosphere may occur in the Watts Bar site area. Should that occur during the life of this nuclear plant, the dispersion meteorology will be evaluated for any significant changes and consequent impacts on plant design and operation.

2.3.4 Short-Term (Accident) Diffusion Estimates 2.3.4.1 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).

2.3-14 METEOROLOGY

WATTS BAR WBNP-102 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 METEOROLOGY 2.3-15

WATTS BAR WBNP-102 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.

2.3.4.2 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 2.3-65 (1974-1993).

The maximum sector set corresponds to the southeast plume sector. The respective values are:

2.3-16 METEOROLOGY

WATTS BAR WBNP-102 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 information based on the 20-year data set for 1974-1993. The original FSAR values are presented with the updated bases for comparison.

2.3.5 Long-Term (Routine) Diffusion 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.

METEOROLOGY 2.3-17

WATTS BAR WBNP-102 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.

(aa) Nashville NWS web site (http://www.srh.noaa.gov/ohx/?n=tornadodatabase) for Cumberland County [Accessed May 12, 2010].

(bb) Morristown NWS web site (http://www.srh.noaa.gov/mrx/?n=mrx_tornado_db) for Bledsoe, Hamilton, McMinn, Meigs, Rhea, and Roane Counties [Accessed May 12, 2010].

(cc) NUREG/CR-4461 (revision 2), Tornado Climatology of the Contiguous United States, February 2007.

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

(dd) U.S. Department of Commerce. Local Climatological Data, Annual Summary with Comparative Data, 2009, Chattanooga, Tennessee, NOAA, National Climatic Data Center, Asheville, North Carolina.

(ee) U.S. Department of Commerce. Local Climatological Data, Annual Summary with Comparative Data, 2009, Knoxville, Tennessee, NOAA, National Climatic Data Center, Asheville, North Carolina.

(ff) National Climatic Data Center (NCDC) Storm Event database for 1950-2009 (http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwEvent~Storms).

(gg) 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.

(13) U.S. Department of Commerce. Climatography of the United States No. 20, 1971-2000, Tennessee.

(hh) NUREG/CR-3759, Lightning Strike Density fo Contiguous United States from Thunderstorm Duration Records, May 1984.

(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.

2.3-18 METEOROLOGY

WATTS BAR WBNP-102 (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.

(ii) NRC Regulatory Guide-1.76 (revision 1), "Design-Basis Tornado and Tornado Missiles for Nuclear Power Plants, March 2007.

(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.

(24) Deleted by Amendment 94.

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

(26) U.S. Department of Commerce. Local Climatological Data, Annual Summary with Comparative Data, 2009, 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.

METEOROLOGY 2.3-19

WATTS BAR WBNP-102 (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. NuclearRegulatory Commission. Regulatory Guide 1.23, Revision 1, "

Meteorological Monitoring Programs for Nuclear Power Plants," Washington, D.C., March 2007.

(37) Tennessee Valley Authority. "Watts Bar Nuclear Plant Environmental Data Station Manual."

(38) Deleted by Amendment 94.

(39) Deleted by Amendment 94.

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

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

(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.

2.3-20 METEOROLOGY

WATTS BAR WBNP-102 (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.

METEOROLOGY 2.3-21

WATTS BAR WBNP-102 Table 2.3-1 Thunderstorm Day Frequencies Chattanooga1 Knoxville2 December 0.6 0.7 January 1.3 0.8 February 2.0 1.4 Winter 3.9 2.9 March 3.6 3.2 April 4.8 4.5 May 7.1 6.9 Spring 15.5 14.6 June 9.0 8.5 July 11.1 9.9 August 8.8 6.9 Summer 28.8 25.3 September 4.0 3.0 October 1.4 1.3 November 1.5 1.1 Autumn 6.9 5.4 Annual 55.1 48.2 1 National Oceanic and Atmospheric Administration, 2009 Local Climatological Data Annual Summary with Comparative Data; Chattanooga, TN (KCHA) -- period of record 62 years.

2 National Oceanic and Atmospheric Administration, 2009 Local Climatological Data Annual Summary with Comparative Data; Knoxville, TN (KTYS) -- period of record 62 years.

2.3-22 METEOROLOGY

WATTS BAR WBNP-102 Table 2.3-1A Extreme Wind Speeds (Page 1 of 2)

This table lists the highest wind speeds observed at Chattanooga NWS, Knoxville NWS, and Watts Bar Nuclear Plant site for different time periods. Because the wind averaging periods varied, all observations were converted to 3-second gusts for comparison (based on ANSI/TIA-222-G, Annex L.a)

Chattanooga, Tennessee (National Weather Service Airport Station)

Period of Record = 1945-2009 (65 years).

Period Data Source (s) Date of Observed value Max 3-sec gust Occurence (averaging period) equivalent 1945-1975 Chattanooga (CHA) Local March 24, 82 mph 102 mph Climatological Data (LCD), 1947 (fastest mile) 1975 Annual and CHA LCD, March 1947.b 1976-1995 CHA LCD, 1995 Annual and November 11, 38 mph 48 mph CHA LCD, November 1995.b 1995. (2-min average) 47 mph (5-sec average) 1996-2009 CHA LCD, 2009 Annual and June 11, 63 mph 63 mph CHA LCD, June 2009.b 2009 (3 second gust)

Maximum wind speed (3-second gust equivalent) = 102 mph on March 24, 1947.

Knoxville, Tennessee (National Weather Service Airport Stations)

Period of Record = 1943-2009 (67 years).

Period Data Source (s) Date of Observed value Max 3-sec gust Occurence (averaging period) equivalent 1943-1974 Knoxville (TYS) LCD, 1974 July 15, 73 mph 88 mph Annual and TYS LCD, July 1961 (fastest mile) 1961.b 1975-1995 TYS LCD, 1995 Annual and November 11, 45 mph 56 mph TYS LCD, November 1995.b 1995. (2-min average) 54 mph (5-sec average) 1996-2009 TYS LCD, 2009 Annual and April 20, 76 mph 76 mph TYS LCD, June 2009.b 1996 (3 second gust)

Maximum wind speed (3-second gust equivalent) = 88 mph on July 15, 1961.

METEOROLOGY 2.3-23

WATTS BAR WBNP-102 Table 2.3-1A Extreme Wind Speeds (Page 2 of 2)

Watts Bar Meteorological Tower Period of Record = 1973-2009 (37 years).

Period Data Source (s) Date of Observed value Max 3-sec gust Occurence (averaging period) equivalent 1973-2009 TVA wind observations for Mar 25, 39 mph 59 mph 10- and 91-meter wind 1975 (hourly average) sensors Maximum wind speed (3-second gust equivalent) = 59 mph on March 25, 1975.

a. ANSI/TIA-222-G, Structural Standard for Antenna Supporting Structures and Antennas", effective January 1, 2006.

The relevant portion of Annex L, "Wind Speed Conversions" is provided below:

Fastest Mile 10-min average 3-sec gust (mph) Wind Speed Averaging Period Hourly mean (mph)

(mph) (sec) (mph) 60 50 72 42 40 70 58 62 49 46 80 66 55 56 53 85 70 51 59 56 90 75 48 62 60 95 78 46 66 63 100 80 45 69 66 105 85 42 73 70 Intermediate values are determined by interpolation.

b. Annual and Monthly Local Climatological Data reports (for applicable cities and time periods) from the NOAA National Climatic Data Center, Asheville, North Carolina.

2.3-24 METEOROLOGY

WATTS BAR WBNP-102 Table 2.3-1B Storm Events for Rhea and Surronding Counties (Page 1 of 2)

These tables list the storm events for Rhea and surrounding counties from the National Climatic Data Center (NCDC) Storm Event database for 1950-2009 (http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwEvent~Storms). Accessed August 20, 2010.

Listed counties are adjacent to Rhea county and/or have potions of the county within 10 miles of Watts Bar Nuclear Plant. Number of occurrences is for the entire county.

High winds:

Search Settings (except county): Begin Date = 01/01/1950 End Date = 12/31/2009 Event type = All High Wind Speed of at Least 50 Knots All other search settings default.

County Total Number of Occurrences Average Occurrences per Year

Rhea (including Watts Bar) 122 2.03 Bledsoe 103 1.72 Cumberland 91 1.52 Hamilton 275 4.58 McMinn 163 2.72 Meigs 82 1.36 Roane 144 2.40 TOTAL EVENTS 980 16.33 METEOROLOGY 2.3-25

WATTS BAR WBNP-102 Table 2.3-1B Storm Events for Rhea and Surronding Counties (Page 2 of 2)

Large Hail:

Search Settings (except county): Begin Date = 01/01/1950 End Date = 12/31/2009 Event type = Hail Hail, Size of at Least 0.75 Inches All other search settings default.

County Total Number of Occurrences Average Occurrences per Year

Rhea (including Watts Bar) 53 0.88 Bledsoe 48 0.80 Cumberland 48 0.80 Hamilton 130 2.17 McMinn 74 1.23 Meigs 33 0.55 Roane 33 0.55 TOTAL EVENTS 419 6.98

Total Number of Occurrences/60 years 2.3-26 METEOROLOGY

WATTS BAR WBNP-102 Table 2.3-2 Temperature Data Dayton and Decatur, Tennessee Coopertive Observer Dataa (Data in °F)

Average Average Extreme Extreme Daily Averageb Daily Maximumb Daily Minimumb Maximumc Minimumc Month Dayton Decatur Dayton Decatur Dayton Decatur Dayton Decatur Dayton Decatur Jan 36.2 40.0 45.9 50.6 26.5 29.4 75 76 -15f -9 Feb 40.5 41.6 51.6 53.0 29.3 30.3 79 78 -4 -20g Mar 48.8 50.5 60.8 63.0 36.7 38.1 85 91 3 2 Apr 57.4 58.5 70.3 72.0 44.4 45.0 92 94 22 20 May 65.4 67.1 77.3 80.8 53.5 53.5 94 99 30 30 Jun 73.3 74.6 84.7 87.2 61.8 62.0 100 103 40 40 d e Jul 76.9 77.6 87.7 89.8 66.1 65.3 107 108 49 48 Aug 76.0 76.9 86.9 89.3 65.0 64.5 104 107 49 49 Sep 70.1 71.9 81.0 85.1 59.1 58.7 100 106 30 34 Oct 58.3 60.0 70.4 74.1 46.1 45.9 90 96 23 19 Nov 48.1 48.4 58.8 61.3 37.3 35.5 83 82 9 7 Dec 39.3 40.3 49.0 50.8 29.6 29.9 76 76 -5 -4 d e f Annual 57.5 59.0 68.7 71.4 46.3 46.5 107 108 -15 -20g

a. Cooperative Observer Stations

[Dayton, Tennessee] Climatography of the United States No. 20 1971-2000 (Station -

Dayton 2 SE, TN; COOP ID = 402360), National Climate Data Center, Ashville, NC.

[Decatur, Tennessee] 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 and Annual NCDC Tennessee Climatological Data for individual years during 1896-1956.

b. Period of Record:

Dayton = 1971-2000 (30 years).

Decatur = 1896-1930 (35 years)

c. Period of Record:

Dayton = 1956-2001 (46 years).

Decatur = 1896-1945, 1952-1956 (60 years).

d. July 16, 1980.

e. July 28, 1930 and July 29, 1952.

f. January 21, 1985

g. Date unknown. According to Climatography of the United States No. 10-77, Decatur reported a low temperature of -20°F during 1896-1930. However, the specific date cannot be identified in the Annual NCDC Tennessee Climatological Data reports for the period. Coldest temperature for a known date was -19°F on January 26, 1940.

METEOROLOGY 2.3-27

WATTS BAR WBNP-102 Table 2.3-3 Temperature Data Chattanooga, Tennessee National Weather Servicea (Data in °F)

Normal Dry Mean Daily Mean Daily Extreme Extreme Month Bulbb Maximumc Minimumc Maximumd Minimumd January 39.4 49.9 31.1 78 -10e February 43.4 52.8 32.5 79 1 March 51.4 62.3 40.0 88 8 April 59.6 71.7 47.8 93 25 May 67.7 80.0 56.7 99 34 June 75.4 86.3 64.4 104 41 July 79.6 89.6 69.0 106f 51 August 78.5 89.0 68.2 105 50 September 72.1 82.6 61.2 102 36 October 60.4 73.0 49.2 94 22 November 50.3 60.6 38.8 84 4 December 42.4 51.8 32.8 78 -2 Annual 60.0 70.8 49.3 106f -10e

a. National Oceanic and Atmospheric Administration, 2009 Local Climatological Data Annual Summary with Comparative Data; Chattanooga, TN (KCHA).

b. Period of Record = 1971-2000 (30 years).

c. Period of Record = 1928-2009 (82 Years).

d. Period of Record = 1940-2009 (70 Years).

e. January 1985.

f. July 1952.

2.3-28 METEOROLOGY

WATTS BAR WBNP-102 Table 2.3-4 Precipitation Data Watts Bar Nuclear Plant and Watts Bar Dam Precipitation Data (Inches)

(Data in Inches)

Average No.

of Days 0.01 Extreme Extreme 24-hour Inch or Morea Averageb Maximumc Minimumc Maximumc Month WBN* Dam* WBN Dam WBN Dam WBN Dam WBN Dam Jan 11 11 4.39 5.30 9.89 11.67 0.80 0.93 3.31 5.31d Feb 10 10 4.12 5.34 12.28 9.79 0.37 0.74 3.56 3.50 e

Mar 11 11 4.50 5.62 12.33 11.75 1.43 1.32 3.49 5.00 Apr 9 10 3.52 4.56 8.72 8.66 0.41 0.80 3.69 3.10 May 10 9 4.00 3.57 11.94 10.94 0.73 0.56 4.26 3.20 Jun 9 9 3.42 3.81 10.29 12.30 0.13 0.03 4.44 3.73 Jul 10 10 3.86 5.14 11.41 12.50 0.25 0.50 3.70 4.80 Aug 8 9 2.96 3.20 7.91 7.13 0.02 0.52 3.61 3.19 f g Sep 7 7 3.45 3.69 8.55 14.78 0.46 0.45 4.77 4.50 Oct 7 6 2.59 2.90 6.52 7.91 0.00 0.00 3.09 3.05 Nov 9 8 4.30 4.13 8.85 14.06 0.73 0.94 2.64 4.63 Dec 11 10 4.31 5.31 11.92 12.08 1.32 0.30 4.72 4.15 Annual 111 110 45.43 52.57

WBN = Watts Bar Nuclear Plant Meteorological tower. The meteorological facility is located 0.8 km south-southwest of Watts Bar Nuclear Plant. The rain gauge is 1 meter above ground.

Dam = TVA rain gauge station 421 at Watts Bar Dam. The Dam is located 1.9 km north of Watts Bar Nuclear Plant. The rain gauge is located on the roof of the Control Building at Watts Bar Dam.

- Annual totals do not equal the sum of monthly values due to rounding.

a. Period of record = 1974-2008 for Watts Bar Nuclear Plant and 1940-1975 for Watts Bar Dam.

b. Period of record = 1974-2008 for Watts Bar Nuclear Plant and 1941-1970 for Watts Bar Dam.

c. Period of record = 1974-2008 for Watts Bar Nuclear Plant and September 1939-September 1989 for Watts Bar Dam.

d. January 1946.

e. March 1975.

f. September 1957.

g. September 17, 1994.

METEOROLOGY 2.3-29

WATTS BAR WBNP-102 Table 2.3-5 Snowfall Data (Inches)

Dayton, Tennessee (Data in Inches)

Month Averagea,b Maximum Monthlya,c Highest Dailya,c January 1.8 9.7 7.2 February 1.6 13.3d 7.5 March 0.8 8.0 8.0e April 0.1 2.7 2.7 May 0 0 0 June 0 0 0 July 0 0 0 August 0 0 0 September 0 0 0 October 0 0 0 November Trace Trace Trace December 0.1 1.1 1.0 Annual 4.4

a. Climatography of the United States, No. 20, 1971-2000 (COOP ID = 402360).

b. Derived from Snow Climatology and 1971-2000 daily data.

c. Derived from 1971-2000 daily data.

d. February 1979

e. March 13, 1993.

2.3-30 METEOROLOGY

WATTS BAR WBNP-102 Table 2.3-6 Snowfall Data Chattanooga and Knoxville, Tennessee NWS (Data in Inches)

Normalc Maximum Monthlyd Maximum in 24 Hrs.d Month Chattanooga Knoxville Chattanooga Knoxville Chattanooga Knoxville January 2.0 3.7 10.2 15.1 10.2 12.0 February 1.3 3.0 10.4 23.3 8.7 17.5 March 1.2 1.6 20.0 20.2 20.0 14.1 April 0.2 0.8 2.8 10.7 2.8 10.7 May 0 0 trace trace trace trace June 0 0 trace trace trace trace July 0 0 0 0 0 0 August 0 0 0 trace 0 trace September 0 0 trace trace trace trace October *

trace trace trace trace November

0.1 2.8 18.2 2.8 18.2 December 0.1 0.7 9.1 12.2 8.9 8.9 Annual 4.8 9.9 20.0 23.3e 20.0 18.2

Value is between 0.00 and 0.05.

a. Local Climatological Data, Annual Summary with Comparative Data, 1983 and 2009, Chattanooga, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, N.C.

b. Local Climatological Data, Annual Summary with Comparative Data, 1983 and 2009, Knoxville, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, N.C.

c. Period of record for monthly normal is 30 years (1971-2000).

d. Period of record for maximum monthly and maximum 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months events is 72 years for Chattanooga and 65 years for Knoxville.

For Chattanooga, the maximum monthly and maximum 24-hour event was 20.0 inches during March 1993.

For Knoxville, the maximum monthly event was 23.3 inches during February 1960 and the maximum 24-hour event was 18.2 inches during November 1952.

e. Another site had the highest maximum monthly event for the Knoxville locality -- 25.7 inches in February 1895.

METEOROLOGY 2.3-31

WATTS BAR WBNP-102 Table 2.3-7 Average Relative Humidity Data (Percent) - Selected Hours Chattanooga, Tennessee*

(Eastern Standard Time)

Updated Data (1971-2000)1 Original Date (1931/41-1974)2 Hour Hour Hour Hour Hour Hour Hour Hour Month 0100 0700 1300 1900 0100 0700 1300 1900 January 79 81 63 66 80 82 63 68 February 77 82 58 58 78 80 57 60 March 76 82 55 53 77 81 53 56 April 78 85 49 49 78 81 49 52 May 87 89 55 58 86 85 51 56 June 87 90 57 60 88 85 54 60 July 87 90 57 62 89 89 57 64 August 88 92 58 64 90 91 57 66 September 89 92 59 66 89 90 55 66 October 88 91 55 68 88 89 52 67 November 83 86 59 68 82 84 55 65 December 80 83 62 68 82 83 62 70 Annual 83 87 57 62 84 85 55 63

1. Local Climatological Data, Annual Summary with Comparative Data, 1983 and 2009, Chattanooga, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, N.C.

(Period of Record = 1971-2000).

2. Local Climatological Data, Annual Summary with Comparative Data, 1974, Chattanooga, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, N.C. (Period of Record =

1941-1974 for hour 0100 and 1931-1974 for hours 0700, 1300, and 1900).

2.3-32 METEOROLOGY

WATTS BAR WBNP-102 Table 2.3-8 Relative Humidity (Percent)

National Weather Service Station Chattanooga, Tennessee*

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

December 75.3 83.6 67.7 100.0 10.7 January 72.3 74.6 69.5 100.0 18.6 February 67.0 76.8 58.0 100.0 12.1 Winter 71.5 78.3 65.1 100.0 10.7 March 64.1 71.4 55.0 100.0 13.8 April 64.6 72.3 56.9 100.0 12.8 May 71.1 77.1 65.0 100.0 19.0 Spring 66.6 73.6 58.9 100.0 12.8 June 72.3 77.4 68.3 100.0 23.1 July 75.5 80.1 71.2 100.0 26.9 August 78.4 82.9 75.3 100.0 32.5 Summer 75.4 80.1 71.6 100.0 23.1 September 79.7 84.0 75.2 100.0 26.0 October 76.6 83.0 71.1 100.0 18.2 November 72.6 79.7 66.2 100.0 16.1 Fall 76.3 82.2 70.8 100.0 16.1 Annual 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.

METEOROLOGY 2.3-33

WATTS BAR WBNP-102 Table 2.3-9 Absolute Humidity Chattanooga, Tennessee NWS (Data in gm/m3)

January 1965-December 1971*

Month Average Avg. Max. Avg. Min. Extreme Max. Extreme Min.

December 5.8 7.2 4.5 16.1 0.9 January 4.8 5.3 4.5 14.0 0.4 February 4.5 5.8 3.4 14.1 0.8 Winter 5.0 6.1 4.1 16.1 0.4 March 5.9 7.2 4.6 16.6 1.1 April 8.6 10.3 7.0 20.1 2.4 May 11.4 12.8 9.9 19.6 3.4 Spring 8.6 10.1 7.1 20.1 1.1 June 14.7 15.9 13.5 22.7 4.9 July 16.7 17.7 15.6 24.2 8.6 August 17.0 18.2 16.0 25.8 9.6 Summer 16.1 17.3 15.0 25.8 4.9 September 14.8 16.2 13.6 23.6 4.2 October 10.0 11.6 8.5 20.8 3.0 November 6.5 7.9 5.1 17.8 1.2 Fall 10.4 11.9 9.1 23.6 1.2 Annual 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.

2.3-34 METEOROLOGY

WATTS BAR WBNP-102 Table 2.3-10 Relative Humidity Watts Bar Nuclear Plant Meteorological Facility (Sheet 1 of 2)

(Data in Percent)

July 1, 1973 - June 30, 1975

Average Average Extreme Extreme Month Average Maximum Minimum Maximum Minimum December 71.2 85.1 53.8 100.0 30.2 January 73.6 87.5 54.5 100.0 10.4 February 70.3 87.5 50.9 100.0 21.4 Winter 71.7 86.7 53.1 100.0 10.4 March 69.9 88.4 49.8 100.0 22.6 April 64.5 87.8 38.6 100.0 11.2 May 78.3 94.1 56.9 100.0 28.3 Spring 70.9 90.1 48.5 100.0 11.2 June 75.2 91.6 55.0 100.0 34.6 July 76.2 93.4 48.4 100.0 10.1 August 78.7 93.6 55.1 100.0 36.7 Summer 76.7 92.9 52.9 100.0 10.1 September 77.9 91.8 56.8 100.0 29.3 October 71.5 89.9 43.2 100.0 19.7 November 69.0 87.0 47.4 96.5 26.9 Fall 72.8 89.6 49.1 100.0 19.7 Annual 73.0

Data were collected at the Watts Bar Meteorological tower located 0.8 km SSW of Watts Bar Nuclear Plant. Temperature and dewpoint instruments at 4 feet above ground.

METEOROLOGY 2.3-35

WATTS BAR WBNP-102 Table 2.3-10 Relative Humidity Watts Bar Nuclear Plant Meteorological Facility (Sheet 2 of 2)

(Data in Percent)

January 1, 1976 - December 31, 2008

Average Average Extreme Extreme Month Average Maximum Minimum Maximum Minimum December 71.2 89.7 52.7 100.0 18.1 January 68.7 87.6 51.1 100.0 14.3 February 66.0 87.8 46.5 100.0 11.6 Winter 68.6 88.4 50.1 100.0 11.6 March 64.0 88.3 43.0 100.0 10.4 April 64.5 91.2 42.1 100.0 11.2 May 72.5 95.5 50.5 100.0 18.3 Spring 67.0 91.7 45.2 100.0 10.4 June 75.0 95.9 53.1 100.0 20.0 July 76.8 95.9 55.1 100.0 19.6 August 76.4 95.6 54.0 100.0 25.6 Summer 76.1 95.8 54.1 100.0 19.6 September 75.9 94.7 53.2 100.0 18.8 October 73.5 94.4 49.9 100.0 15.5 November 71.3 91.7 50.3 100.0 12.0 Autumn 73.6 93.6 51.1 100.0 12.0 Annual 71.3

Data were collected at the Watts Bar Meteorological tower located 0.8 km SSW of Watts Bar Nuclear Plant. Temperature and dewpoint instruments are 10 meters (33 feet) above ground.

Relative Humidity (RH) is calculated from simultaneous 10-m temperature (T) and 10-m dewpoint (Td) using equations from El Paso NWS website (http://www.srh.noaa.gov/epz/?n=wxcalc).

7.5*T d e 237.6 + T d RH = ----- *100 where: e = 6.11* 10 e s 7.5*T d 237.6 + T e s = 6.11* 10 units: RH = percent (%)

T, Td = degrees celsius (°C) e, es = millibars (mb) 2.3-36 METEOROLOGY

WATTS BAR WBNP-102 Table 2.3-11 Absolute Humidity Watts Bar Nuclear Plant Meteorological Facility (Sheet 1 of 2)

(Data in gm/m3)

July 1, 1973 - June 30, 1975

Average Average Extreme Extreme Month Average Maximum Minimum Maximum Minimum December 5.2 6.6 4.0 14.5 1.5 January 6.1 7.8 4.3 13.2 1.0 February 5.7 7.3 4.3 15.1 1.5 Winter 5.7 7.2 4.2 15.1 1.0 March 7.1 8.9 5.3 14.7 1.8 April 8.3 10.3 6.4 17.7 2.0 May 13.7 15.9 11.6 21.5 4.9 Spring 9.7 11.7 7.8 21.5 1.8 June 14.7 17.2 12.4 22.1 7.8 July 17.1 19.3 13.7 22.7 1.8 August 16.7 18.9 14.9 24.4 10.1 Summer 16.2 18.4 13.7 24.4 1.8 September 14.4 16.5 12.5 21.9 4.9 October 9.2 11.0 7.7 17.7 3.1 November 7.0 8.7 5.4 16.6 2.1 Fall 10.2 12.1 8.5 21.9 2.1 Annual 10.4

Data were collected at the Watts Bar Meteorological tower located 0.8 km SSW of Watts Bar Nuclear Plant. Temperature and dewpoint instruments at 4 feet above ground.

METEOROLOGY 2.3-37

WATTS BAR WBNP-102 Table 2.3-11 Absolute Humidity Watts Bar Nuclear Plant Meteorological Facility (Sheet 2 of 2)

(Data in gm/m3)

January 1, 1976 - December 31, 2008

Average Average Extreme Extreme Month Average Maximum Minimum Maximum Minimum December 5.1 6.5 4.2 16.5 0.5 January 4.4 5.7 3.6 14.7 0.4 February 4.7 6.1 3.9 14.2 0.6 Winter 4.8 6.1 3.9 16.5 0.4 March 6.1 7.8 5.0 17.6 0.8 April 8.3 10.3 6.8 18.8 1.6 May 11.9 14.0 10.4 24.0 3.1 Spring 8.8 10.7 7.4 24.0 0.8 June 15.4 17.5 13.6 24.8 5.3 July 17.5 19.5 15.6 27.1 7.1 August 16.9 19.0 15.1 27.6 7.2 Summer 16.6 18.7 14.8 27.6 5.3 September 14.0 16.0 12.3 21.9 3.8 October 9.7 11.5 8.3 21.9 1.7 November 6.9 8.4 5.7 19.0 1.2 Autumn 10.2 11.9 8.7 21.2 1.2 Annual 10.1

Data were collected at the Watts Bar Meteorological tower located 0.8 km SSW of Watts Bar Nuclear Plant. Temperature and dewpoint instruments are 10 meters (33 feet) above ground.

Absolute Humidity (AH) is calculated from simultaneous 10-m temperature (T) and 10-m vapor pressure (Pw = e from Table 2.3-10) using equation from User's Guide - Vaisala HUMICAP Humidity and Temperature Transmitter Series HMT330.

Pw AH = 216.68 * --------

T units: AH = grams/cubic meter (g/m3)

T = degrees kelvin (°K)

Pw = millibars (mb) 2.3-38 METEOROLOGY

WATTS BAR WBNP-102 Table 2.3-12 Fog Data*

Est. from Month Chat.a Knox.b Oak R.c Hardwickd January 2.8 2.6 2.5 1 February 1.5 1.8 1.3 2 March 1.2 1.7 1.8 1 April 1.3 1.3 1.7 1 May 2.2 2.2 5.5 2 June 1.6 1.8 4.8 2 July 1.5 2.1 5.8 2 August 1.9 3.5 5.2 3 September 3.3 3.8 7.5 4 October 4.8 4.3 7.8 6 November 3.3 2.9 4.5 4 December 2.4 2.4 4.3 3 Annual 27.8 30.4 52.7 33

Mean number of days with heavy fog, which is defined by horizontal visibility 1/4 mile or less.

a. Local Climatological Data, Annual Summary with Comparative Data, 2009, Chattanooga, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, North Carolina. Period of record = 46 years.

b. Local Climatological Data, Annual Summary with Comparative Data, 2009, Knoxville, Tennessee, U.S.

Department of Commerce, NOAA, NCDC, Asheville, North Carolina. Period of record = 46 years.

c. Local Climatological Data, Annual Summary with Comparative Data, 2009, Oak Ridge, Tennessee, U.S. Department of Commerce, NOAA, NCDC, Asheville, North Carolina. Period of record = 10 years.

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

METEOROLOGY 2.3-39

Table 2.3-13 2.3-40 Joint Percentage Frequencies of Wind Speed By Wind Direction Disregarding Stability Class Watts Bar Nuclear Plant Jan 1, 1974 - Dec 31, 1993 WIND WIND SPEED(MPH) WATTS BAR 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 0.125 0.707 1.399 1.677 1.445 1.578 0.074 0.000 0.000 7.004 NNE 0.124 0.615 1.407 2.043 1.956 2.127 0.112 0.000 0.000 8.446 NE 0.160 0.728 1.957 1.783 1.051 0.695 0.011 0.001 0.000 6.386 ENE 0.242 1.112 2.944 1.296 0.425 0.150 0.002 0.000 0.000 6.170 E 0.151 0.992 1.540 0.583 0.138 0.045 0.002 0.000 0.000 3.451 ESE 0.059 0.438 0.546 0.192 0.028 0.013 0.001 0.000 0.000 1.277 SE 0.086 0.609 0.834 0.319 0.076 0.048 0.014 0.000 0.000 1.985 SSE 0.145 0.892 1.540 0.598 0.176 0.141 0.037 0.003 0.000 3.532 S 0.222 1.106 2.621 1.844 0.869 0.732 0.204 0.021 0.001 7.620 SSW 0.281 1.209 3.504 4.017 3.001 3.115 0.611 0.048 0.000 15.786 SW 0.237 1.479 2.506 1.516 0.756 0.470 0.072 0.004 0.001 7.040 WSW 0.239 1.888 2.135 0.666 0.372 0.317 0.082 0.004 0.000 5.702 W 0.235 2.104 1.843 0.646 0.546 0.653 0.090 0.008 0.002 6.127 WNW 0.212 2.052 1.505 0.637 0.597 0.821 0.086 0.005 0.000 5.915 NW 0.266 2.455 2.061 0.765 0.722 1.026 0.102 0.002 0.000 7.354 NNW 0.168 1.354 1.463 0.975 0.921 1.242 0.082 0.001 0.000 6.205 SUBTOTAL 2.951 19.738 29.823 19.554 13.081 13.172 1.583 0.095 0.003 100.00 TOTAL HOURS OF VALID W IND OBSERVATIONS169102 TOTAL HOURS OF OBSERVATIONS175320 RECOVERABILITY PERCENTAGE96.5 TOTAL HOURS CALM4990 METEOROLOGICAL FACILITY: W ATTS BAR NUCLEAR PLANT W IND SPEED AND DIRECTION M EASURED AT 9.72 M ETER LEVEL M EAN W IND SPEED = 4.07Date Printed: 29-NOV-94 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUM BERS METEOROLOGY WBNP-102

Table 2.3-14 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY Jan 1, 74 - Dec 31, 93 Wind ( Wind Speed(Mph)

Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total WATTS BAR N 0.109 0.561 1.284 1.176 1.327 2.822 0.419 0.019 0.000 7.788 NNE 0.189 0.809 2.381 2.260 2.104 2.940 0.437 0.008 0.000 11.128 NE 0.272 1.144 3.460 2.490 1.633 1.555 0.126 0.002 0.000 10.682 ENE 0.215 1.013 2.622 1.257 0.579 0.393 0.024 0.000 0.000 6.203 E 0.109 0.774 1.061 0.488 0.195 0.087 0.008 0.000 0.000 2.722 ESE 0.056 0.418 0.526 0.279 0.059 0.026 0.002 0.001 0.000 1.367 SE 0.061 0.387 0.642 0.334 0.103 0.093 0.024 0.008 0.000 1.652 SSE 0.112 0.574 1.313 0.671 0.217 0.240 0.097 0.018 0.000 3.242 S 0.191 0.765 2.456 1.791 0.887 0.875 0.314 0.093 0.013 7.386 SSW 0.237 0.745 3.261 4.368 3.484 4.555 1.901 0.355 0.032 18.939 SW 0.140 0.584 1.787 2.080 1.732 2.366 0.714 0.103 0.015 9.521 WSW 0.085 0.448 0.981 0.747 0.514 0.764 0.294 0.073 0.017 3.922 W 0.068 0.428 0.721 0.428 0.396 0.859 0.327 0.049 0.007 3.282 WNW 0.056 0.390 0.549 0.416 0.450 1.243 0.438 0.031 0.001 3.573 NW 0.062 0.388 0.661 0.486 0.650 1.398 0.391 0.027 0.001 4.065 NNW 0.065 0.387 0.710 0.622 0.714 1.554 0.457 0.021 0.001 4.530 Subtotal 2.026 9.813 24.413 19.894 15.143 21.770 6.045 0.808 0.087 100.000 Total Hours Of Valid Wind Observations 142902 Total Hours Of Observations 149016 Recoverability Percentage 95.9 Total Hours Calm 2895 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 5.6981 Date Printed: 29-NOV-94 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-41 WBNP-102

Table 2.3-15 Wind Direction Persistence Data Disregarding Stability, Watts Bar Nuclear Plant METEOROLOGY Jan 1, 74 - Dec 31, 93 (Sheet 1 of 2)

Wind Direction ACC. ACC.

N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW CALM TOTAL TOTAL FREQUENCY WATTS BAR 2 860 887 906 938 487 134 208 462 1085 1242 1030 782 879 783 988 802 344 12817 28445 100.00 3 360 465 388 428 201 44 77 196 496 697 392 328 353 328 481 373 186 5793 15628 54.94 4 241 298 253 220 71 9 27 77 275 531 219 132 182 179 255 212 113 3294 9835 34.58 5 159 169 146 122 30 1 11 30 174 417 130 67 114 127 162 114 72 2045 6541 23.00 6 112 160 89 64 18 0 5 21 102 289 46 42 61 68 99 81 61 1318 4496 15.81 7 74 93 70 37 7 0 3 4 50 269 38 20 20 34 63 52 45 879 3178 11.17 8 75 78 39 20 2 0 0 5 29 187 26 20 34 18 56 25 29 643 2299 8.08 9 36 42 20 11 0 0 0 2 18 139 17 5 9 17 22 30 23 391 1656 5.82 10 29 54 14 12 0 0 0 2 14 123 8 6 9 8 12 13 20 324 1265 4.45 11 25 30 9 4 0 0 0 0 13 99 5 4 6 12 11 11 9 238 941 3.31 12 15 19 3 1 0 0 3 1 11 79 1 0 3 2 2 7 4 151 703 2.47 13 14 16 4 2 0 0 0 0 3 62 2 2 2 2 4 6 5 124 552 1.94 14 5 13 4 0 0 0 0 0 2 49 3 0 1 2 0 3 6 88 428 1.50 15 5 14 0 1 0 0 0 0 2 42 3 1 1 0 1 6 2 78 340 1.20 16 4 8 3 1 1 0 0 0 0 21 0 1 1 1 2 2 0 45 262 0.92 17 4 9 1 0 0 0 0 0 1 20 1 0 0 0 1 2 0 39 217 0.76 18 3 6 2 0 0 0 0 1 0 22 1 1 0 0 1 0 0 37 178 0.63 19 3 8 0 0 0 0 0 0 0 19 0 0 1 1 2 1 0 35 141 0.50 20 4 6 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 20 106 0.37 21 1 5 0 0 0 0 0 0 0 2 1 0 0 0 1 3 0 13 86 0.30 22 1 7 0 0 0 0 0 0 0 6 0 0 0 0 0 0 0 14 73 0.26 23 1 0 0 0 0 0 0 0 1 6 0 0 0 0 1 1 0 10 59 0.21 24 0 5 0 0 0 0 0 0 0 3 0 0 0 0 0 1 0 9 49 0.17 25 1 0 0 0 0 0 0 0 1 3 0 0 0 0 0 1 0 6 40 0.14 26 0 1 1 0 0 0 0 0 0 6 0 0 0 0 2 0 0 10 34 0.12 27 0 0 0 0 0 0 0 0 0 3 0 0 0 0 1 0 0 4 24 0.08 28 0 0 0 0 0 0 0 0 0 3 0 0 0 0 0 1 0 4 20 0.07 29 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 16 0.06 30 0 0 0 0 0 0 0 0 0 4 0 0 0 0 0 0 0 4 16 0.06 31 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12 0.04 32 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 2 12 0.04

>32 0 3 0 0 0 0 0 0 0 7 0 0 0 0 0 0 0 10 10 0.04 2.3-42 TOTAL 2032 2396 1952 1861 817 188 334 801 2277 4362 1923 1411 1676 1582 2167 1747 919 28445 WBNP-102

Table 2.3-15 Wind Direction Persistence Data Disregarding Stability, Watts Bar Nuclear Plant METEOROLOGY Jan 1, 74 - Dec 31, 93 (Sheet 2 of 2)

Wind Direction ACC. ACC.

N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW CALM TOTAL TOTAL FREQUENCY WATTS BAR Maximum Persistence 25 40 26 16 16 5 12 18 25 44 21 18 19 19 27 28 15 (Hours) 50.0% 3 3 3 2 2 2 2 2 3 4 2 2 2 3 3 3 3 80.0% 6 6 5 4 3 3 3 3 4 8 4 4 4 4 5 5 6 90.0% 8 9 6 5 4 3 4 4 6 11 5 5 5 6 6 6 8 99.0% 16 20 11 10 7 4 7 8 11 21 10 10 10 11 11 15 13 99.9% 22 37 18 15 16 5 12 18 17 34 18 16 16 16 26 25 15 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At The 9.72 Meter Level 2.3-43 WBNP-102

Table 2.3-16 Wind Direction Persistence Data Disregarding Stability, Watts Bar Nuclear Plant METEOROLOGY Jan 1, 77 - Dec 31, 93 (Sheet 1 of 2)

Persistence Wind Direction ACC. ACC. WATTS BAR (Hours) N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW CALM TOTAL TOTAL FREQUENCY 2 772 1014 1137 822 323 145 174 414 1015 1244 1088 489 370 367 412 491 245 10522 24808 100.00 3 348 503 539 353 102 32 60 134 438 735 503 148 123 171 205 247 128 4769 14286 57.59 4 227 360 403 200 45 16 19 65 212 577 344 87 82 124 106 120 73 3060 9517 38.36 5 168 182 275 98 12 4 11 28 124 391 191 45 47 64 77 79 38 1834 6457 26.03 6 122 165 169 59 4 0 7 10 79 285 130 26 33 55 50 49 40 1283 4623 18.64 7 77 128 122 31 3 0 0 6 34 249 77 13 13 31 37 31 18 870 3340 13.46 8 54 73 70 18 2 0 1 5 21 175 58 8 14 14 17 31 11 572 2470 9.96 9 47 59 57 7 0 0 2 1 9 148 43 8 10 14 21 17 8 451 1898 7.65 10 27 46 35 8 0 0 0 2 11 124 16 1 5 6 14 8 1 304 1447 5.83 11 20 36 18 4 0 0 0 1 8 99 13 3 1 7 6 11 5 232 1143 4.61 12 20 36 31 1 0 0 0 0 3 81 10 2 3 3 6 10 1 207 911 3.67 13 11 23 14 1 0 0 0 1 2 60 10 2 3 0 6 2 0 135 704 2.84 14 18 15 10 0 0 0 0 0 0 64 6 1 2 2 3 4 1 126 569 2.29 15 10 23 10 0 0 0 0 0 0 54 3 2 1 1 5 1 0 110 443 1.79 16 5 16 4 0 0 0 0 0 0 31 0 0 2 2 1 2 0 63 333 1.34 17 4 7 2 0 0 0 0 0 0 29 1 0 0 0 2 1 0 46 270 1.09 18 2 9 3 0 0 0 0 1 0 31 1 0 0 0 1 1 0 49 224 0.90 19 3 8 1 0 0 0 0 0 0 16 1 0 0 1 0 1 0 31 175 0.71 20 0 7 1 0 0 0 0 0 0 17 3 1 0 0 1 0 0 30 144 0.58 21 1 5 2 0 0 0 0 0 0 5 2 0 0 0 0 1 0 16 114 0.46 22 2 6 1 0 0 0 0 0 0 14 1 0 0 0 1 0 0 25 98 0.40 23 1 3 0 0 0 0 0 0 0 9 2 0 0 0 0 0 0 15 73 0.29 24 0 1 0 0 0 0 0 0 0 5 0 0 0 0 0 0 1 7 58 0.23 25 0 3 0 0 0 0 0 0 0 5 2 0 0 0 0 0 0 10 51 0.21 26 0 0 2 0 0 0 0 0 0 3 0 0 0 0 0 0 0 5 41 0.17 27 1 2 2 0 0 0 0 0 0 2 1 0 0 0 0 0 0 8 36 0.15 28 1 0 0 0 0 0 0 0 0 5 0 0 0 0 1 0 0 7 28 0.11 29 0 1 0 0 0 0 0 0 0 7 0 0 0 0 0 0 0 8 21 0.08 2.3-44 WBNP-102

Table 2.3-16 Wind Direction Persistence Data Disregarding Stability, Watts Bar Nuclear Plant METEOROLOGY Jan 1, 77 - Dec 31, 93 (Sheet 2 of 2)

Persistence Wind Direction ACC. ACC. WATTS BAR (Hours) N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW CALM TOTAL TOTAL FREQUENCY 30 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 13 0.05 31 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 2 12 0.05 32 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 10 0.04

>32 0 1 0 0 0 0 0 0 0 8 0 0 0 0 0 0 0 9 9 0.04 TOTAL 1941 2733 2908 1602 491 197 274 668 1956 4475 2507 836 709 862 972 1107 570 24808 MAXIMUM PERSISTENCE (HOURS) 28 33 27 13 8 5 9 18 13 48 32 20 16 19 28 21 24 50.0% 3 3 3 2 2 2 2 2 2 4 3 2 2 3 3 3 3 80.0% 6 6 5 4 3 3 3 3 4 8 5 4 4 5 5 5 5 90.0% 8 9 7 5 4 4 4 4 5 12 7 5 6 6 7 7 6 99.0% 16 20 14 9 7 5 8 8 10 23 13 11 13 12 15 13 11 99.9% 27 29 26 12 8 5 9 18 13 34 25 20 16 19 28 19 24 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At The 46.36 Meter Level 2.3-45 WBNP-102

Table 2.3-17 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY January (74-93)

Wind Wind Speed(MPH) WATTS BAR Direction CALM 0.6-1.4 1.5-3.4 3.5-5. 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.123 0.767 1.411 1.555 1.795 2.158 0.075 0.000 0.000 7.883 NNE 0.136 0.527 1.891 2.418 2.377 2.151 0.110 0.000 0.000 9.609 NE 0.181 0.870 2.343 1.884 1.069 0.548 0.000 0.000 0.000 6.894 ENE 0.238 1.117 3.110 1.110 0.356 0.110 0.000 0.000 0.000 6.040 E 0.130 0.829 1.486 0.370 0.151 0.096 0.000 0.000 0.000 3.062 ESE 0.043 0.329 0.432 0.123 0.034 0.021 0.000 0.000 0.000 0.981 SE 0.060 0.336 0.740 0.144 0.027 0.000 0.000 0.000 0.000 1.307 SSE 0.116 0.658 1.411 0.329 0.103 0.014 0.027 0.021 0.000 2.678 S 0.130 0.555 1.754 1.130 0.706 0.432 0.178 0.014 0.000 4.897 SSW 0.211 0.836 2.911 3.569 2.466 2.850 0.569 0.021 0.000 13.431 SW 0.150 0.849 1.822 1.514 0.870 0.555 0.151 0.000 0.000 5.911 WSW 0.179 1.144 2.041 1.240 0.877 0.733 0.315 0.007 0.000 6.536 W 0.188 1.445 1.904 0.980 1.185 1.329 0.288 0.014 0.000 7.333 WNW 0.168 1.459 1.521 0.959 1.089 1.623 0.158 0.000 0.000 6.976 NW 0.208 1.692 2.007 1.144 1.260 1.904 0.212 0.000 0.000 8.428 NNW 0.164 1.144 1.767 1.288 1.480 2.048 0.144 0.000 0.000 8.034 SUBTOTAL 2.425 14.556 28.550 19.755 15.844 16.570 2.226 0.075 0.000 100.000 Total Hours Of Valid Wind Observations 14599 Total Hours Of Observations 14880 Recoverability Percentage 98.1 Total Hours Calm 354 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 9.72 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 4.57 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-46 WBNP-102

Table 2.3-18 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY January (77-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.372 1.510 1.147 1.446 3.400 0.678 0.000 0.000 8.639 NNE 0.140 0.565 2.504 2.496 2.617 3.473 0.557 0.000 0.000 12.352 NE 0.170 0.687 3.045 2.722 1.971 1.745 0.057 0.000 0.000 10.395 ENE 0.136 0.678 2.310 1.018 0.533 0.226 0.000 0.000 0.000 4.901 E 0.085 0.598 1.260 0.218 0.057 0.024 0.000 0.000 0.000 2.241 ESE 0.030 0.315 0.339 0.089 0.016 0.000 0.000 0.000 0.000 0.789 SE 0.036 0.380 0.420 0.073 0.073 0.016 0.000 0.008 0.000 1.006 SSE 0.065 0.372 1.058 0.331 0.137 0.024 0.008 0.000 0.000 1.995 S 0.104 0.525 1.769 1.171 0.509 0.428 0.121 0.065 0.016 4.708 SSW 0.142 0.412 2.714 3.497 2.859 4.038 1.381 0.291 0.032 15.367 SW 0.090 0.485 1.486 1.688 1.672 2.811 0.743 0.105 0.032 9.112 WSW 0.066 0.428 1.018 0.767 0.670 1.373 0.517 0.178 0.065 5.082 W 0.050 0.291 0.808 0.420 0.775 1.615 0.759 0.218 0.032 4.969 WNW 0.041 0.363 0.541 0.614 0.905 2.367 0.880 0.057 0.000 5.768 NW 0.042 0.258 0.670 0.743 1.220 2.609 0.953 0.065 0.000 6.560 NNW 0.050 0.307 0.792 0.775 1.074 2.423 0.695 0.000 0.000 6.116 SUBTOTAL 1.333 7.035 22.244 17.769 16.533 26.573 7.350 0.985 0.178 100.000 Total Hours Of Valid Wind Observations 12381 Total Hours Of Observations 12648 Recoverability Percentage 97.9 Total Hours Calm 165 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed and Direction Measured at 46.36 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 6.34 Note: Totals and Subtotals are Obtained From Unrounded Numbers 2.3-47 WBNP-102

Table 2.3-19 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY February (74-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.120 0.693 1.701 1.807 1.634 2.319 0.083 0.000 0.000 8.357 NNE 0.128 0.745 1.807 2.492 2.499 2.868 0.151 0.000 0.000 10.691 NE 0.170 0.896 2.477 2.078 1.250 0.896 0.030 0.000 0.000 7.796 ENE 0.258 1.536 3.584 1.250 0.354 0.128 0.000 0.000 0.000 7.108 E 0.118 0.858 1.491 0.467 0.196 0.083 0.008 0.000 0.000 3.220 ESE 0.035 0.331 0.361 0.098 0.045 0.000 0.000 0.000 0.000 0.871 SE 0.049 0.474 0.497 0.196 0.038 0.060 0.000 0.000 0.000 1.314 SSE 0.069 0.519 0.851 0.339 0.136 0.128 0.038 0.008 0.000 2.087 S 0.116 0.625 1.679 0.994 0.474 0.550 0.294 0.023 0.000 4.753 SSW 0.166 0.806 2.492 2.989 2.612 3.433 1.242 0.053 0.000 13.792 SW 0.138 0.866 1.882 1.558 1.001 1.084 0.173 0.008 0.000 6.711 WSW 0.152 1.084 1.935 0.986 0.647 0.798 0.256 0.008 0.000 5.866 W 0.147 1.302 1.611 0.858 0.768 1.182 0.188 0.008 0.000 6.064 WNW 0.117 1.137 1.189 0.715 0.949 1.438 0.256 0.023 0.000 5.824 NW 0.180 1.724 1.844 1.024 1.287 1.777 0.196 0.000 0.000 8.032 NNW 0.123 1.031 1.415 1.340 1.235 2.198 0.173 0.000 0.000 7.516 SUBTOTAL 2.085 14.628 26.816 19.190 15.125 18.942 3.087 0.128 0.000 100.000 Total Hours Of Valid Wind Observations 13283 Total Hours Of Observations 13560 Recoverability Percentage 98.0 Total Hours Calm 277 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 9.72 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 4.84 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-48 WBNP-102

Table 2.3-20 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY February (77-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.073 0.380 1.396 1.228 1.926 3.825 0.821 0.035 0.000 9.684 NNE 0.139 0.654 2.729 3.074 2.526 3.842 0.707 0.000 0.000 13.672 NE 0.203 0.760 4.160 3.118 2.261 1.926 0.274 0.000 0.000 12.702 ENE 0.137 0.830 2.491 1.316 0.742 0.389 0.035 0.000 0.000 5.940 E 0.056 0.503 0.848 0.397 0.132 0.053 0.035 0.000 0.000 2.025 ESE 0.026 0.256 0.371 0.159 0.018 0.000 0.000 0.000 0.000 0.830 SE 0.026 0.203 0.433 0.168 0.035 0.071 0.009 0.000 0.000 0.945 SSE 0.040 0.300 0.680 0.344 0.088 0.106 0.097 0.035 0.000 1.692 S 0.076 0.380 1.457 0.839 0.486 0.627 0.424 0.115 0.009 4.413 SSW 0.086 0.336 1.749 2.562 2.208 4.107 2.129 0.627 0.053 13.857 SW 0.067 0.336 1.281 1.952 1.625 2.835 1.086 0.194 0.026 9.403 WSW 0.044 0.274 0.804 0.768 0.530 1.157 0.530 0.159 0.035 4.302 W 0.040 0.318 0.662 0.495 0.477 1.334 0.592 0.150 0.009 4.077 WNW 0.031 0.318 0.424 0.459 0.601 2.005 0.804 0.088 0.000 4.730 NW 0.033 0.238 0.556 0.415 1.042 2.579 0.698 0.044 0.000 5.606 NNW 0.045 0.318 0.768 0.839 0.954 2.252 0.874 0.071 0.000 6.122 SUBTOTAL 1.122 6.404 20.811 18.134 15.652 27.109 9.116 1.519 0.132 100.000 Total Hours Of Valid Wind Observations 11321 Total Hours Of Observations 11520 Recoverability Percentage 98.3 Total Hours Calm 127 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed and Direction Measured at 46.36 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 6.68 Note: Totals and Subtotals are Obtained From Unrounded Numbers 2.3-49 WBNP-102

Table 2.3-21 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY March (74-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.097 0.546 1.596 1.659 1.484 2.331 0.189 0.000 0.000 7.903 NNE 0.103 0.770 1.498 1.806 1.729 2.576 0.112 0.000 0.000 8.595 NE 0.142 0.924 2.212 1.421 1.001 1.113 0.028 0.000 0.000 6.842 ENE 0.223 1.365 3.563 1.029 0.504 0.175 0.014 0.000 0.000 6.874 E 0.112 0.903 1.575 0.511 0.161 0.035 0.000 0.000 0.000 3.298 ESE 0.042 0.392 0.546 0.154 0.070 0.021 0.007 0.000 0.000 1.233 SE 0.059 0.581 0.714 0.280 0.119 0.168 0.105 0.000 0.000 2.026 SSE 0.075 0.609 1.043 0.553 0.217 0.406 0.133 0.000 0.000 3.036 S 0.101 0.658 1.568 1.316 0.658 1.344 0.588 0.091 0.007 6.332 SSW 0.137 0.721 2.303 3.402 3.171 5.419 1.911 0.063 0.000 17.128 SW 0.121 0.868 1.806 1.624 1.155 1.043 0.189 0.000 0.007 6.814 WSW 0.138 1.169 1.883 0.679 0.469 0.574 0.105 0.014 0.000 5.032 W 0.127 1.519 1.288 0.693 0.539 1.099 0.210 0.063 0.021 5.560 WNW 0.109 1.246 1.155 0.651 0.616 1.330 0.161 0.028 0.000 5.296 NW 0.142 1.533 1.603 1.036 0.882 1.890 0.266 0.021 0.000 7.374 NNW 0.092 0.847 1.190 1.008 1.253 2.051 0.210 0.007 0.000 6.659 SUBTOTAL 1.820 14.653 25.546 17.824 14.030 21.577 4.229 0.287 0.035 100.000 Total Hours of Valid Wind Observations 14284 Total Hours of Observations 14880 Recoverability Percentage 96.0 Total Hours Calm 260 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed and Direction Measured At 9.72 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 5.17 Note: Totals and Subtotals Are Obtained From Unrounded Numbers 2.3-50 WBNP-102

Table 2.3-22 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY March (77-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.106 0.449 1.379 1.246 1.346 3.879 0.797 0.066 0.000 9.269 NNE 0.172 0.581 2.376 2.401 1.653 3.315 0.498 0.000 0.000 10.996 NE 0.264 0.930 3.614 2.368 1.288 1.894 0.199 0.000 0.000 10.556 ENE 0.157 0.606 2.093 0.972 0.573 0.498 0.058 0.000 0.000 4.958 E 0.077 0.515 0.814 0.515 0.282 0.150 0.017 0.000 0.000 2.370 ESE 0.049 0.282 0.557 0.241 0.075 0.042 0.000 0.008 0.000 1.253 SE 0.033 0.183 0.390 0.332 0.116 0.174 0.150 0.066 0.000 1.445 SSE 0.068 0.216 0.955 0.557 0.191 0.557 0.432 0.033 0.000 3.009 S 0.111 0.449 1.462 1.213 0.706 1.205 0.831 0.316 0.058 6.349 SSW 0.128 0.432 1.778 2.725 2.475 5.076 3.780 0.972 0.058 17.423 SW 0.089 0.349 1.180 1.570 1.886 3.157 1.595 0.307 0.042 10.173 WSW 0.056 0.282 0.689 0.714 0.565 0.905 0.515 0.125 0.017 3.869 W 0.051 0.316 0.565 0.407 0.341 1.097 0.640 0.075 0.025 3.515 WNW 0.040 0.249 0.432 0.474 0.507 1.545 0.764 0.083 0.017 4.110 NW 0.054 0.324 0.606 0.557 0.822 2.019 0.756 0.066 0.008 5.213 NNW 0.050 0.241 0.615 0.565 0.872 2.093 0.989 0.058 0.008 5.491 SUBTOTAL 1.504 6.405 19.505 16.855 13.698 27.604 12.020 2.176 0.233 100.000 Total Hours Of Valid Wind Observations 12038 Total Hours Of Observations 12648 Recoverability Percentage 95.2 Total Hours Calm 181 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 46.36 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 7.13 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-51 WBNP-102

Table 2.3-23 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY April (74-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.074 0.651 0.984 1.281 1.230 1.476 0.130 0.000 0.000 5.828 NNE 0.075 0.528 1.129 1.788 1.621 2.128 0.181 0.000 0.000 7.450 NE 0.113 0.832 1.657 1.100 1.013 0.738 0.022 0.000 0.000 5.476 ENE 0.168 1.223 2.468 0.970 0.528 0.232 0.000 0.000 0.000 5.588 E 0.122 1.122 1.563 0.767 0.224 0.058 0.000 0.000 0.000 3.856 ESE 0.056 0.608 0.630 0.355 0.022 0.007 0.000 0.000 0.000 1.677 SE 0.059 0.695 0.601 0.391 0.145 0.043 0.000 0.000 0.000 1.933 SSE 0.101 0.782 1.433 0.796 0.275 0.297 0.145 0.007 0.000 3.835 S 0.134 1.136 1.816 1.592 0.905 1.100 0.579 0.094 0.000 7.356 SSW 0.178 1.028 2.888 3.495 3.597 5.797 1.578 0.282 0.000 18.842 SW 0.166 1.389 2.258 1.534 0.890 0.695 0.174 0.036 0.000 7.142 WSW 0.177 1.918 1.976 0.789 0.420 0.536 0.159 0.014 0.000 5.988 W 0.160 1.744 1.773 0.745 0.644 1.020 0.232 0.007 0.000 6.326 WNW 0.126 1.585 1.201 0.709 0.637 1.426 0.224 0.000 0.000 5.909 NW 0.152 1.715 1.643 0.832 0.825 1.744 0.232 0.007 0.000 7.151 NNW 0.101 1.078 1.158 0.876 0.861 1.462 0.109 0.000 0.000 5.645 SUBTOTAL 1.961 18.034 25.177 18.020 13.837 18.758 3.763 0.449 0.000 100.000 Total Hours Of Valid Wind Observations 13818 Total Hours Of Observations 14400 Recoverability Percentage 96.0 Total Hours Calm 271 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 9.72 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 4.87 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-52 WBNP-102

Table 2.3-24 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY April (77-93)

Wind Wind Speed (MPH) Wind WATTS BAR 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 0.087 0.401 0.959 0.820 0.968 2.467 0.462 0.009 0.000 6.173 NNE 0.157 0.706 1.735 1.656 1.674 2.642 0.645 0.009 0.000 9.224 NE 0.228 0.846 2.711 1.500 1.177 1.447 0.209 0.000 0.000 8.118 ENE 0.192 0.750 2.241 0.942 0.619 0.514 0.009 0.000 0.000 5.266 E 0.075 0.392 0.776 0.488 0.288 0.227 0.009 0.000 0.000 2.255 ESE 0.047 0.262 0.471 0.340 0.139 0.026 0.000 0.000 0.000 1.285 SE 0.045 0.218 0.480 0.384 0.174 0.166 0.017 0.000 0.000 1.483 SSE 0.092 0.453 0.985 0.820 0.323 0.480 0.253 0.087 0.000 3.493 S 0.158 0.584 1.883 1.691 1.055 1.107 0.575 0.288 0.070 7.412 SSW 0.198 0.610 2.467 3.470 3.862 6.164 3.662 0.828 0.157 21.418 SW 0.119 0.418 1.439 1.953 1.883 3.025 1.412 0.314 0.052 10.616 WSW 0.075 0.340 0.828 0.750 0.671 1.142 0.567 0.192 0.061 4.626 W 0.065 0.384 0.636 0.584 0.471 1.194 0.645 0.070 0.017 4.067 WNW 0.044 0.305 0.384 0.453 0.453 1.857 1.020 0.052 0.000 4.569 NW 0.058 0.279 0.619 0.549 1.003 2.014 0.610 0.087 0.000 5.219 NNW 0.050 0.279 0.506 0.567 0.689 1.901 0.750 0.035 0.000 4.776 SUBTOTAL 1.691 7.228 19.119 16.966 15.449 26.373 10.846 1.970 0.357 100.000 Total Hours Of Valid Wind Observations 11470 Total Hours Of Observations 12240 Recoverability Percentage 93.7 Total Hours Calm 194 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 46.36 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 6.93 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-53 WBNP-102

Table 2.3-25 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY May (74-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.109 0.618 1.237 1.606 1.293 1.208 0.050 0.000 0.000 6.121 NNE 0.099 0.426 1.265 1.748 1.571 1.606 0.057 0.000 0.000 6.773 NE 0.143 0.633 1.798 1.883 1.094 0.796 0.000 0.000 0.000 6.347 ENE 0.225 0.988 2.836 1.407 0.682 0.284 0.007 0.000 0.000 6.429 E 0.183 1.329 1.791 0.768 0.213 0.028 0.007 0.000 0.000 4.320 ESE 0.081 0.682 0.696 0.306 0.028 0.014 0.000 0.000 0.000 1.808 SE 0.117 0.931 1.066 0.583 0.142 0.057 0.000 0.000 0.000 2.896 SSE 0.178 1.237 1.791 0.725 0.156 0.156 0.014 0.000 0.000 4.257 S 0.256 1.315 3.042 2.168 1.080 0.874 0.178 0.000 0.000 8.912 SSW 0.327 1.578 3.980 4.307 3.440 3.397 0.448 0.007 0.000 17.482 SW 0.281 1.940 2.843 1.812 0.746 0.561 0.050 0.000 0.000 8.234 WSW 0.256 2.409 1.940 0.441 0.320 0.149 0.014 0.000 0.000 5.529 W 0.254 2.459 1.869 0.561 0.434 0.362 0.014 0.000 0.000 5.954 WNW 0.165 1.578 1.237 0.633 0.497 0.590 0.021 0.000 0.000 4.721 NW 0.211 1.940 1.656 0.540 0.441 0.696 0.014 0.000 0.000 5.499 NNW 0.149 1.222 1.308 0.760 0.505 0.739 0.036 0.000 0.000 4.718 SUBTOTAL 3.035 21.285 30.353 20.247 12.643 11.520 0.910 0.007 0.000 100.000 Total Hours Of Valid Wind Observations 14071 Total Hours Of Observations 14880 Recoverability Percentage 94.6 Total Hours Calm 427 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 9.72 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 3.87 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-54 WBNP-102

Table 2.3-26 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY May (77-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.114 0.504 1.123 1.098 1.245 2.099 0.382 0.016 0.000 6.581 NNE 0.220 0.944 2.213 1.912 1.757 2.253 0.366 0.000 0.000 9.665 NE 0.324 1.318 3.319 2.310 1.432 1.464 0.089 0.000 0.000 10.256 ENE 0.266 1.163 2.644 1.155 0.838 0.700 0.049 0.000 0.000 6.814 E 0.119 0.610 1.090 0.700 0.203 0.114 0.000 0.000 0.000 2.836 ESE 0.068 0.268 0.708 0.488 0.065 0.049 0.008 0.000 0.000 1.654 SE 0.080 0.325 0.822 0.439 0.203 0.220 0.000 0.000 0.000 2.089 SSE 0.141 0.635 1.383 0.797 0.212 0.260 0.081 0.016 0.000 3.525 S 0.241 0.748 2.709 2.017 1.131 1.180 0.374 0.065 0.000 8.465 SSW 0.296 0.822 3.425 4.417 3.474 5.255 2.595 0.456 0.016 20.755 SW 0.189 0.610 2.099 2.253 2.001 2.628 0.773 0.106 0.000 10.658 WSW 0.112 0.553 1.058 0.683 0.537 0.716 0.212 0.033 0.000 3.903 W 0.093 0.496 0.838 0.399 0.317 0.667 0.236 0.000 0.000 3.046 WNW 0.066 0.382 0.569 0.415 0.358 0.879 0.220 0.008 0.000 2.897 NW 0.072 0.366 0.659 0.439 0.447 0.968 0.268 0.000 0.000 3.220 NNW 0.081 0.415 0.740 0.578 0.635 0.984 0.187 0.016 0.000 3.635 SUBTOTAL 2.481 10.160 25.397 20.101 14.854 20.434 5.841 0.716 0.016 100.000 Total Hours Of Valid Wind Observations 12293 Total Hours Of Observations 12648 Recoverability Percentage 97.2 Total Hours Calm 305 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 46.36 Meter Level 1-DEC-94 Mean Wind Speed = 5.53 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-55 WBNP-102

Table 2.3-27 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY June (74-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.078 0.403 1.023 1.801 1.174 0.994 0.050 0.000 0.000 5.525 NNE 0.077 0.403 1.001 1.679 1.477 1.830 0.166 0.000 0.000 6.633 NE 0.097 0.454 1.304 1.304 0.627 0.483 0.000 0.000 0.000 4.268 ENE 0.185 0.850 2.521 1.527 0.490 0.137 0.007 0.000 0.000 5.718 E 0.158 1.102 1.765 0.605 0.173 0.014 0.000 0.000 0.000 3.817 ESE 0.068 0.605 0.627 0.180 0.050 0.029 0.007 0.000 0.000 1.566 SE 0.113 0.951 1.102 0.461 0.043 0.000 0.007 0.000 0.000 2.678 SSE 0.174 1.390 1.765 0.720 0.245 0.086 0.000 0.000 0.000 4.381 S 0.294 1.599 3.753 2.637 1.297 0.713 0.029 0.000 0.000 10.323 SSW 0.376 1.643 5.187 5.619 4.005 3.112 0.158 0.000 0.000 20.100 SW 0.319 2.305 3.487 2.183 1.001 0.317 0.007 0.000 0.000 9.619 WSW 0.265 2.377 2.449 0.483 0.202 0.072 0.000 0.000 0.000 5.849 W 0.218 2.240 1.722 0.555 0.382 0.195 0.014 0.000 0.000 5.326 WNW 0.185 1.844 1.520 0.569 0.612 0.418 0.007 0.000 0.000 5.156 NW 0.193 2.082 1.426 0.526 0.497 0.360 0.014 0.000 0.000 5.099 NNW 0.111 0.994 1.016 0.778 0.576 0.439 0.029 0.000 0.000 3.943 SUBTOTAL 2.910 21.245 31.669 21.627 12.852 9.200 0.497 0.000 0.000 100.000 Total Hours Of Valid Wind Observations 13381 Total Hours Of Observations 14400 Recoverability Percentage 96.4 Total Hours Calm 404 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 9.72 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 3.62 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-56 WBNP-102

Table 2.3-28 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY June (77-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.107 0.792 1.163 1.137 1.196 1.988 0.219 0.008 0.000 6.612 NNE 0.174 0.944 2.224 2.056 1.592 2.334 0.388 0.008 0.000 9.720 NE 0.231 1.340 2.881 1.938 1.053 0.994 0.017 0.008 0.000 8.463 ENE 0.195 1.078 2.477 1.331 0.767 0.447 0.008 0.000 0.000 6.303 E 0.109 0.784 1.213 0.615 0.261 0.126 0.000 0.000 0.000 3.109 ESE 0.054 0.371 0.615 0.329 0.076 0.034 0.000 0.008 0.000 1.486 SE 0.068 0.472 0.775 0.514 0.076 0.034 0.008 0.000 0.000 1.947 SSE 0.133 0.716 1.702 0.977 0.329 0.194 0.008 0.000 0.000 4.059 S 0.225 0.927 3.185 2.603 1.255 0.876 0.135 0.008 0.000 9.215 SSW 0.254 0.767 3.859 6.471 4.870 5.771 1.297 0.042 0.017 23.347 SW 0.149 0.725 1.997 2.898 2.182 2.755 0.480 0.008 0.000 11.195 WSW 0.091 0.463 1.188 0.893 0.371 0.615 0.110 0.000 0.000 3.730 W 0.066 0.463 0.741 0.379 0.354 0.607 0.051 0.017 0.000 2.678 WNW 0.065 0.573 0.615 0.396 0.404 0.767 0.051 0.000 0.000 2.871 NW 0.050 0.421 0.497 0.354 0.404 0.581 0.042 0.008 0.000 2.359 NNW 0.058 0.447 0.615 0.463 0.514 0.699 0.110 0.000 0.000 2.906 SUBTOTAL 2.030 11.281 25.748 23.355 15.705 18.822 2.924 0.118 0.017 100.000 Total Hours Of Valid Wind Observations 11869 Total Hours Of Observations 12240 Recoverability Percentage 97.0 Total Hours Calm 241 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 46.36 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 4.98 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-57 WBNP-102

Table 2.3-29 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY July (74-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.062 0.414 1.056 1.388 0.808 0.373 0.000 0.000 0.000 4.100 NNE 0.058 0.387 1.001 1.643 1.719 1.070 0.021 0.000 0.000 5.899 NE 0.068 0.373 1.243 1.747 1.084 0.366 0.014 0.000 0.000 4.893 ENE 0.126 0.656 2.347 1.574 0.614 0.138 0.000 0.000 0.000 5.456 E 0.118 1.049 1.760 0.884 0.166 0.055 0.000 0.000 0.000 4.032 ESE 0.060 0.518 0.918 0.394 0.055 0.000 0.000 0.000 0.000 1.945 SE 0.104 0.870 1.609 0.670 0.076 0.035 0.007 0.000 0.000 3.369 SSE 0.169 1.415 2.603 1.084 0.214 0.124 0.000 0.000 0.000 5.609 S 0.246 1.664 4.211 2.996 1.042 0.504 0.014 0.000 0.000 10.678 SSW 0.310 1.885 5.516 5.647 3.238 1.685 0.076 0.000 0.000 18.357 SW 0.268 2.168 4.225 1.843 0.683 0.249 0.000 0.000 0.000 9.436 WSW 0.223 2.575 2.748 0.587 0.193 0.069 0.000 0.000 0.000 6.395 W 0.182 2.154 2.195 0.580 0.338 0.200 0.000 0.000 0.000 5.650 WNW 0.158 1.899 1.878 0.663 0.373 0.166 0.007 0.000 0.000 5.143 NW 0.161 1.892 1.947 0.456 0.407 0.269 0.007 0.000 0.000 5.139 NNW 0.095 1.091 1.174 0.677 0.545 0.311 0.007 0.000 0.000 3.899 SUBTOTAL 2.409 21.008 36.431 22.831 11.557 5.613 0.152 0.000 0.000 100.000 Total Hours Of Valid Wind Observations 14485 Total Hours Of Observations 14880 Recoverability Percentage 97.3 Total Hours Calm 349 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 9.72 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 3.32 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-58 WBNP-102

Table 2.3-30 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY July (77-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.088 0.833 1.468 1.237 1.064 0.940 0.041 0.000 0.000 5.673 NNE 0.122 0.899 2.302 1.873 1.947 1.980 0.132 0.008 0.000 9.263 NE 0.161 1.279 2.929 2.062 1.477 0.973 0.016 0.000 0.000 8.897 ENE 0.120 0.883 2.252 1.526 0.982 0.429 0.025 0.000 0.000 6.216 E 0.071 0.602 1.262 0.800 0.363 0.074 0.000 0.000 0.000 3.173 ESE 0.034 0.256 0.635 0.462 0.132 0.066 0.000 0.000 0.000 1.585 SE 0.050 0.256 1.064 0.817 0.173 0.049 0.025 0.000 0.000 2.434 SSE 0.104 0.627 2.095 1.171 0.256 0.198 0.025 0.000 0.000 4.476 S 0.165 0.874 3.448 2.854 1.279 0.998 0.066 0.000 0.000 9.685 SSW 0.219 0.866 4.867 7.095 4.917 4.290 0.643 0.041 0.000 22.938 SW 0.120 0.544 2.607 3.003 2.079 1.881 0.355 0.008 0.000 10.597 WSW 0.059 0.610 0.940 0.932 0.610 0.544 0.099 0.008 0.000 3.804 W 0.051 0.470 0.874 0.652 0.437 0.454 0.082 0.000 0.000 3.021 WNW 0.042 0.478 0.610 0.346 0.412 0.553 0.025 0.008 0.000 2.475 NW 0.050 0.495 0.808 0.561 0.388 0.454 0.107 0.000 0.000 2.863 NNW 0.046 0.454 0.759 0.495 0.487 0.635 0.016 0.008 0.000 2.901 SUBTOTAL 1.501 10.427 28.923 25.887 17.002 14.519 1.658 0.082 0.000 100.000 Total Hours Of Valid Wind Observations 12122 Total Hours Of Observations 12648 Recoverability Percentage 95.8 Total Hours Calm 182 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 46.36 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 4.62 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-59 WBNP-102

Table 2.3-31 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY August (74-93)

Wind Wind Speed(MPH) WATTS BAR 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 0.132 0.672 1.428 1.934 1.130 0.770 0.014 0.000 0.000 6.081 NNE 0.101 0.367 1.241 1.907 2.004 1.414 0.035 0.000 0.000 7.069 NE 0.153 0.471 1.955 1.913 0.887 0.492 0.007 0.000 0.000 5.879 ENE 0.278 0.915 3.494 2.045 0.499 0.250 0.000 0.000 0.000 7.481 E 0.185 1.109 1.823 0.991 0.139 0.049 0.000 0.000 0.000 4.296 ESE 0.080 0.499 0.776 0.354 0.014 0.014 0.000 0.000 0.000 1.737 SE 0.120 0.749 1.165 0.506 0.125 0.090 0.000 0.000 0.000 2.755 SSE 0.226 1.199 2.392 1.026 0.277 0.111 0.000 0.000 0.000 5.232 S 0.349 1.754 3.792 2.940 1.075 0.603 0.007 0.000 0.000 10.520 SSW 0.409 1.865 4.638 4.368 2.662 1.456 0.021 0.000 0.000 15.419 SW 0.342 2.156 3.279 1.220 0.263 0.069 0.000 0.000 0.000 7.330 WSW 0.310 2.558 2.371 0.395 0.076 0.007 0.000 0.000 0.000 5.718 W 0.258 2.385 1.712 0.333 0.187 0.014 0.000 0.000 0.000 4.889 WNW 0.242 2.302 1.539 0.444 0.153 0.076 0.000 0.000 0.000 4.755 NW 0.307 2.808 2.073 0.451 0.257 0.097 0.007 0.000 0.000 5.999 NNW 0.189 1.359 1.636 0.638 0.624 0.381 0.014 0.000 0.000 4.840 SUBTOTAL 3.681 23.170 35.316 21.464 10.372 5.893 0.104 0.000 0.000 100.000 Total Hours Of Valid Wind Observations 14424 Total Hours Of Observations 14880 Recoverability Percentage 96.9 Total Hours Calm 531 Meteorological Facility: Watts Bar Nuclear Plant Date Printed: 1-DEC-94 Wind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 3.20 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-60 WBNP-102

Table 2.3-32 98Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY August (77-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.134 0.737 1.483 1.424 1.206 1.625 0.142 0.000 0.000 6.752 NNE 0.241 1.131 2.848 2.161 2.111 2.186 0.109 0.008 0.000 10.796 NE 0.346 1.474 4.247 2.622 1.659 0.963 0.067 0.000 0.000 11.379 ENE 0.275 1.332 3.209 2.237 0.888 0.511 0.050 0.000 0.000 8.501 E 0.140 0.972 1.349 0.880 0.285 0.151 0.008 0.000 0.000 3.784 ESE 0.077 0.528 0.746 0.578 0.101 0.059 0.008 0.000 0.000 2.096 SE 0.086 0.461 0.955 0.570 0.159 0.151 0.008 0.000 0.000 2.389 SSE 0.153 0.737 1.784 1.081 0.402 0.226 0.017 0.000 0.000 4.400 S 0.277 1.072 3.502 2.957 1.198 0.871 0.042 0.000 0.000 9.919 SSW 0.356 1.014 4.867 5.831 4.071 3.301 0.352 0.008 0.000 19.799 SW 0.191 0.771 2.379 2.212 1.374 0.930 0.117 0.000 0.000 7.973 WSW 0.088 0.486 0.963 0.670 0.218 0.193 0.025 0.000 0.000 2.643 W 0.069 0.461 0.679 0.302 0.159 0.201 0.008 0.000 0.000 1.878 WNW 0.066 0.394 0.704 0.352 0.209 0.226 0.025 0.000 0.000 1.976 NW 0.086 0.528 0.888 0.352 0.268 0.285 0.084 0.000 0.000 2.490 NNW 0.082 0.519 0.829 0.662 0.469 0.586 0.075 0.000 0.000 3.223 SUBTOTAL 2.664 12.616 31.432 24.889 14.778 12.465 1.139 0.017 0.000 100.000 Total Hours Of Valid Wind Observations 11937 Total Hours Of Observations 12648 Recoverability Percentage 94.4 Total Hours Calm 318 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 46.36 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 4.24 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-61 WBNP-102

Table 2.3-33 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY September (74-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.188 0.890 1.780 2.091 1.664 1.158 0.029 0.000 0.000 7.800 NNE 0.155 0.550 1.657 2.554 2.352 3.169 0.130 0.000 0.000 10.567 NE 0.186 0.601 2.048 2.677 1.368 0.984 0.022 0.007 0.000 7.892 ENE 0.274 0.999 2.902 1.512 0.347 0.145 0.000 0.000 0.000 6.178 E 0.166 0.818 1.548 0.695 0.080 0.036 0.000 0.000 0.000 3.343 ESE 0.059 0.268 0.579 0.159 0.022 0.022 0.000 0.000 0.000 1.109 SE 0.088 0.391 0.861 0.224 0.072 0.014 0.014 0.000 0.000 1.665 SSE 0.171 0.912 1.520 0.651 0.174 0.058 0.000 0.000 0.000 3.485 S 0.307 1.397 2.981 2.113 1.143 0.767 0.029 0.000 0.000 8.737 SSW 0.348 1.418 3.531 3.944 2.598 1.382 0.058 0.000 0.000 13.278 SW 0.281 1.737 2.265 1.165 0.355 0.072 0.000 0.000 0.000 5.874 WSW 0.271 2.178 1.686 0.326 0.065 0.014 0.000 0.000 0.000 4.541 W 0.290 2.489 1.643 0.326 0.195 0.072 0.000 0.000 0.000 5.015 WNW 0.327 2.967 1.693 0.470 0.268 0.166 0.000 0.000 0.000 5.892 NW 0.430 3.813 2.315 0.535 0.434 0.355 0.000 0.000 0.000 7.883 NNW 0.278 2.055 1.903 1.035 0.673 0.796 0.000 0.000 0.000 6.740 SUBTOTAL 3.821 23.480 30.912 20.478 11.809 9.211 0.282 0.007 0.000 100.000 Total Hours Of Valid Wind Observations 13820 Total Hours Of Observations 14400 Recoverability Percentage 96.0 Total Hours Calm 528 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 9.72 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 3.51 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-62 WBNP-102

Table 2.3-34 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY September (77-93)

Wind Wind Speed(MPH) WATTS BAR 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 0.129 0.604 1.261 1.501 1.403 2.646 0.169 0.000 0.000 7.712 NNE 0.256 0.968 2.744 2.753 2.690 3.871 0.657 0.018 0.000 13.957 NE 0.388 1.545 4.067 3.312 2.060 2.131 0.240 0.018 0.000 13.760 ENE 0.299 1.438 2.895 1.598 0.666 0.444 0.027 0.000 0.000 7.367 E 0.148 1.128 1.012 0.426 0.186 0.044 0.000 0.000 0.000 2.945 ESE 0.089 0.613 0.675 0.364 0.053 0.036 0.009 0.000 0.000 1.838 SE 0.094 0.586 0.781 0.249 0.080 0.062 0.027 0.009 0.000 1.888 SSE 0.169 0.844 1.607 0.915 0.275 0.231 0.000 0.000 0.000 4.041 S 0.277 1.083 2.930 2.060 0.861 1.048 0.124 0.009 0.000 8.393 SSW 0.336 1.243 3.623 4.466 3.570 3.818 0.719 0.062 0.000 17.838 SW 0.169 0.790 1.652 1.900 1.438 1.279 0.044 0.000 0.000 7.272 WSW 0.104 0.488 1.021 0.551 0.240 0.195 0.018 0.000 0.000 2.617 W 0.072 0.462 0.577 0.329 0.222 0.240 0.044 0.000 0.000 1.945 WNW 0.074 0.417 0.657 0.284 0.204 0.479 0.044 0.000 0.000 2.161 NW 0.080 0.444 0.710 0.364 0.293 0.657 0.036 0.000 0.000 2.584 NNW 0.085 0.506 0.719 0.586 0.648 1.021 0.115 0.000 0.000 3.681 SUBTOTAL 2.770 13.159 26.931 21.657 14.891 18.203 2.273 0.115 0.000 100.000 Total Hours Of Valid Wind Observations 11262 Total Hours Of Observations 12240 Recoverability Percentage 92.0 Total Hours Calm 312 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 46.36 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 4.74 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-63 WBNP-102

Table 2.3-35 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY October (74-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.269 1.027 1.805 1.861 1.937 2.055 0.049 0.000 0.000 9.002 NNE 0.225 0.847 1.527 2.194 1.923 2.298 0.146 0.000 0.000 9.160 NE 0.262 0.798 1.965 1.937 1.222 0.757 0.000 0.000 0.000 6.941 ENE 0.374 1.326 2.617 1.222 0.340 0.118 0.000 0.000 0.000 5.998 E 0.195 0.909 1.146 0.396 0.111 0.076 0.000 0.000 0.000 2.833 ESE 0.069 0.389 0.333 0.083 0.000 0.021 0.000 0.000 0.000 0.895 SE 0.103 0.562 0.528 0.118 0.049 0.028 0.000 0.000 0.000 1.388 SSE 0.197 0.757 1.319 0.292 0.160 0.069 0.021 0.000 0.000 2.814 S 0.333 1.125 2.388 1.673 0.833 0.639 0.062 0.000 0.000 7.054 SSW 0.369 1.083 2.805 3.076 2.312 2.083 0.153 0.000 0.000 11.880 SW 0.308 1.354 1.888 1.062 0.444 0.194 0.007 0.000 0.000 5.258 WSW 0.383 2.083 1.958 0.458 0.208 0.104 0.007 0.000 0.000 5.202 W 0.472 3.082 1.895 0.410 0.299 0.368 0.000 0.000 0.000 6.526 WNW 0.510 3.686 1.687 0.673 0.569 0.660 0.021 0.000 0.000 7.806 NW 0.696 4.638 2.701 0.660 0.576 0.618 0.035 0.000 0.000 9.923 NNW 0.350 1.993 1.701 1.125 0.868 1.264 0.021 0.000 0.000 7.321 SUBTOTAL 5.117 25.660 28.263 17.238 11.851 11.351 0.521 0.000 0.000 100.000 Total Hours Of Valid Wind Observations 14404 Total Hours Of Observations 14880 Recoverability Percentage 96.8 Total Hours Calm 737 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 9.72 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 3.56 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-64 WBNP-102

Table 2.3-36 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY October (77-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.163 0.562 1.221 1.025 1.660 3.768 0.602 0.000 0.000 9.002 NNE 0.317 0.855 2.613 2.450 2.197 2.962 0.285 0.000 0.000 11.679 NE 0.487 1.595 3.728 2.588 1.628 1.717 0.065 0.000 0.000 11.808 ENE 0.456 1.579 3.410 1.001 0.619 0.236 0.024 0.000 0.000 7.325 E 0.235 1.514 1.058 0.350 0.163 0.090 0.016 0.000 0.000 3.426 ESE 0.118 0.863 0.431 0.163 0.016 0.000 0.000 0.000 0.000 1.591 SE 0.119 0.724 0.578 0.195 0.049 0.057 0.008 0.000 0.000 1.731 SSE 0.207 0.944 1.318 0.480 0.155 0.244 0.057 0.000 0.000 3.406 S 0.328 1.164 2.417 1.587 0.798 0.822 0.252 0.033 0.000 7.400 SSW 0.410 1.017 3.467 3.996 3.280 3.841 1.465 0.098 0.000 17.575 SW 0.241 0.830 1.807 1.620 1.367 1.563 0.358 0.024 0.000 7.810 WSW 0.138 0.570 0.944 0.619 0.415 0.464 0.138 0.000 0.000 3.288 W 0.132 0.610 0.830 0.244 0.277 0.570 0.179 0.000 0.000 2.842 WNW 0.082 0.366 0.529 0.350 0.439 1.213 0.317 0.008 0.000 3.305 NW 0.098 0.480 0.586 0.383 0.578 1.099 0.179 0.000 0.000 3.402 NNW 0.089 0.399 0.578 0.521 0.676 1.701 0.439 0.008 0.000 4.411 Subtotal 3.622 14.072 25.515 17.571 14.316 20.347 4.387 0.171 0.000 100.000 Total Hours Of Valid Wind Observations 12287 Total Hours Of Observations 12648 Recoverability Percentage 97.1 Total Hours Calm 445 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 46.36 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 5.03 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-65 WBNP-102

Table 2.3-37 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY November (74-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.190 1.041 1.378 1.636 1.493 1.737 0.151 0.000 0.000 7.626 NNE 0.241 1.091 1.974 2.261 2.153 2.089 0.072 0.000 0.000 9.880 NE 0.254 0.969 2.268 1.694 1.062 0.488 0.007 0.000 0.000 6.743 ENE 0.329 1.292 2.892 0.976 0.179 0.043 0.000 0.000 0.000 5.712 E 0.190 1.019 1.400 0.359 0.014 0.007 0.000 0.000 0.000 2.989 ESE 0.058 0.366 0.366 0.065 0.000 0.007 0.000 0.000 0.000 0.861 SE 0.071 0.402 0.495 0.136 0.050 0.065 0.029 0.000 0.000 1.248 SSE 0.114 0.452 0.998 0.416 0.108 0.194 0.043 0.000 0.000 2.325 S 0.228 0.746 2.153 1.199 0.660 0.761 0.230 0.000 0.000 5.977 SSW 0.289 0.804 2.871 3.560 2.727 3.223 0.646 0.036 0.000 14.155 SW 0.242 1.077 2.002 1.170 0.782 0.323 0.043 0.000 0.000 5.639 WSW 0.305 1.644 2.239 0.754 0.452 0.416 0.065 0.000 0.000 5.875 W 0.368 2.476 2.203 0.739 0.725 0.897 0.036 0.000 0.000 7.445 WNW 0.359 2.792 1.773 0.545 0.560 0.775 0.072 0.000 0.000 6.876 NW 0.425 3.172 2.239 1.019 0.883 1.041 0.086 0.000 0.000 8.866 NNW 0.278 1.931 1.601 1.234 1.191 1.471 0.079 0.000 0.000 7.785 SUBTOTAL 3.940 21.273 28.852 17.764 13.041 13.536 1.557 0.036 0.000 100.000 Total Hours Of Valid Wind Observations 13933 Total Hours Of Observations 14400 Recoverability Percentage 96.8 Total Hours Calm 549 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 9.72 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 3.99 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-66 WBNP-102

Table 2.3-38 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY November (77-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.116 0.573 1.306 1.096 1.290 3.253 0.725 0.034 0.000 8.392 NNE 0.201 0.952 2.309 2.056 2.309 2.857 0.396 0.008 0.000 11.090 NE 0.326 1.180 4.121 2.756 1.787 1.795 0.126 0.000 0.000 12.092 ENE 0.273 1.180 3.253 1.129 0.497 0.160 0.000 0.000 0.000 6.493 E 0.133 0.944 1.222 0.270 0.084 0.000 0.000 0.000 0.000 2.653 ESE 0.054 0.548 0.337 0.067 0.008 0.000 0.000 0.000 0.000 1.015 SE 0.062 0.514 0.489 0.143 0.067 0.093 0.025 0.000 0.000 1.393 SSE 0.104 0.531 1.155 0.320 0.160 0.253 0.160 0.042 0.000 2.725 S 0.187 0.725 2.318 1.306 0.750 0.809 0.539 0.126 0.000 6.761 SSW 0.227 0.716 2.967 3.767 2.958 4.560 2.200 0.371 0.017 17.782 SW 0.142 0.641 1.660 1.896 1.433 2.158 0.725 0.051 0.008 8.713 WSW 0.102 0.405 1.256 0.767 0.615 0.818 0.464 0.110 0.008 4.544 W 0.072 0.489 0.674 0.379 0.430 1.037 0.346 0.017 0.000 3.443 WNW 0.052 0.346 0.506 0.430 0.379 1.155 0.396 0.000 0.000 3.264 NW 0.073 0.455 0.733 0.506 0.573 1.525 0.303 0.000 0.000 4.169 NNW 0.085 0.455 0.927 0.716 0.784 2.014 0.480 0.008 0.000 5.471 Subtotal 2.208 10.653 25.234 17.606 14.126 22.486 6.886 0.767 0.034 100.000 Total Hours Of Valid Wind Observations 11865 Total Hours Of Observations 12240 Recoverability Percentage 96.9 Total Hours Calm 262 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 46.36 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 5.73 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-67 WBNP-102

Table 2.3-39 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY December (74-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.098 0.759 1.390 1.511 1.709 2.390 0.071 0.000 0.000 7.928 NNE 0.110 0.752 1.667 2.050 2.064 2.411 0.170 0.000 0.000 9.223 NE 0.144 0.929 2.234 1.766 0.950 0.709 0.007 0.000 0.000 6.740 ENE 0.187 1.106 3.014 0.908 0.199 0.035 0.000 0.000 0.000 5.450 E 0.090 0.851 1.135 0.177 0.028 0.000 0.007 0.000 0.000 2.289 ESE 0.025 0.270 0.270 0.021 0.000 0.000 0.000 0.000 0.000 0.585 SE 0.043 0.355 0.589 0.106 0.021 0.014 0.007 0.000 0.000 1.135 SSE 0.092 0.745 1.277 0.227 0.050 0.057 0.028 0.000 0.000 2.475 S 0.133 0.674 2.241 1.312 0.546 0.504 0.277 0.035 0.000 5.721 SSW 0.167 0.816 2.851 4.163 3.206 3.667 0.539 0.121 0.000 15.528 SW 0.149 1.014 2.262 1.511 0.908 0.511 0.078 0.000 0.000 6.433 WSW 0.174 1.475 2.362 0.858 0.539 0.355 0.064 0.000 0.000 5.827 W 0.191 1.915 2.277 0.979 0.865 1.128 0.099 0.000 0.000 7.453 WNW 0.169 2.085 1.638 0.610 0.858 1.213 0.121 0.007 0.000 6.701 NW 0.234 2.426 2.709 0.965 0.943 1.603 0.156 0.000 0.000 9.035 NNW 0.144 1.496 1.674 0.957 1.248 1.787 0.170 0.000 0.000 7.477 Subtotal 2.149 17.667 29.589 18.121 14.135 16.383 1.794 0.163 0.000 100.000 Total Hours Of Valid Wind Observations 14100 Total Hours Of Observations 14880 Recoverability Percentage 94.8 Total Hours Calm 303 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 9.72 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 4.39 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-68 WBNP-102

Table 2.3-40 Joint Percentage Frequencies Of Wind Speed By Wind Direction Disregarding Stability Class, Watts Bar Nuclear Plant METEOROLOGY December (77-93)

Wind Wind Speed (MPH) WATTS BAR 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 0.074 0.514 1.128 1.169 1.186 3.973 0.836 0.058 0.000 8.940 NNE 0.112 0.506 1.982 2.281 2.206 3.658 0.547 0.033 0.000 11.325 NE 0.158 0.763 2.762 2.621 1.841 1.650 0.174 0.000 0.000 9.970 ENE 0.127 0.647 2.190 0.887 0.431 0.166 0.000 0.000 0.000 4.448 E 0.068 0.713 0.796 0.199 0.033 0.000 0.008 0.000 0.000 1.818 ESE 0.039 0.456 0.423 0.066 0.008 0.000 0.000 0.000 0.000 0.993 SE 0.037 0.315 0.514 0.116 0.025 0.025 0.017 0.008 0.000 1.057 SSE 0.068 0.506 1.004 0.274 0.083 0.116 0.033 0.008 0.000 2.091 S 0.135 0.639 2.364 1.178 0.605 0.547 0.299 0.100 0.800 5.874 SSW 0.178 0.713 3.260 4.023 3.243 4.462 2.604 0.489 0.041 19.014 SW 0.103 0.498 1.800 2.015 1.825 3.351 0.896 0.124 0.017 10.628 WSW 0.068 0.456 1.053 0.846 0.705 1.037 0.340 0.075 0.017 4.596 W 0.050 0.365 0.738 0.547 0.481 1.286 0.340 0.041 0.000 3.848 WNW 0.049 0.481 0.605 0.406 0.506 1.858 0.722 0.066 0.000 4.693 NW 0.043 0.365 0.589 0.597 0.763 2.007 0.647 0.050 0.008 5.069 NNW 0.044 0.307 0.672 0.705 0.763 2.331 0.763 0.050 0.000 5.634 Subtotal 1.352 8.244 21.879 17.931 14.705 26.466 8.228 1.103 0.091 100.000 Total Hours Of Valid Wind Observations 12057 Total Hours Of Observations 12648 Recoverability Percentage 95.3 Total Hours Calm 163 Meteorological Facility: Watts Bar Nuclear Plant Wind Speed And Direction Measured At 46.36 Meter Level Date Printed: 1-DEC-94 Mean Wind Speed = 6.36 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-69 WBNP-102

WATTS BAR WBNP-102 THIS PAGE IS INTENTIONALLY LEFT BLANK 2.3-70 METEOROLOGY

WATTS BAR WBNP-102 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 3.9 2.07 0.23 0.01 - 6.21 E 1.64 0.5 0.04 - - 2.18 ESE 1.11 0.45 0.25 - - 1.81 SE 1.72 0.5 0.33 - - 2.55 SSE 2.27 0.81 0.16 - - 3.24 S 2.94 2.83 0.68 0.15 - 6.6 SSW 2.54 4.69 1.8 0.33 - 9.36 SW 2.54 3.08 0.62 0.04 - 6.28 WSW 2.07 1.08 0.2 0.03 - 3.38 W 2.18 1.26 1.02 0.09 - 4.55 WNW 2.38 1.21 0.9 0.01 - 4.5 NW 4.97 1.74 0.73 0.06 - 7.5 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.

METEOROLOGY 2.3-71

Table 2.3-42 Percent Occurrences Of Inversion Conditions And Pasquill Stability Classes A-G*

2.3-72 Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 93 STABILITY CLASS INVERSIONS A B C D E F G WATTS BAR JANUARY 31.0 2.2 2.2 4.5 47.0 26.5 11.5 6.1 FEBRUARY 34.3 3.7 3.6 5.4 42.5 23.3 11.9 9.5 MARCH 36.3 5.4 4.1 6.1 37.5 23.7 11.9 11.3 APRIL 39.9 5.2 4.2 7.3 33.0 22.6 13.2 14.5 MAY 40.3 4.4 4.1 7.1 33.3 26.2 16.8 8.1 JUNE 40.7 5.6 4.7 7.9 30.9 27.3 17.6 5.9 JULY 39.6 5.8 4.5 7.9 31.5 29.4 16.5 4.6 AUGUST 40.7 5.0 4.4 7.2 30.8 32.5 17.0 3.0 SEPTEMBER 40.7 5.0 4.2 6.6 31.8 30.9 17.4 4.0 OCTOBER 44.3 4.3 3.9 6.3 32.1 24.1 20.9 8.5 NOVEMBER 41.2 1.8 2.2 4.5 38.5 26.8 15.4 10.8 DECEMBER 36.1 1.6 1.8 4.6 44.0 27.1 13.6 7.3 ANNUAL 38.8 4.2 3.7 6.3 36.1 26.7 15.3 7.8

Inversion Conditions Distributed Within Total Hours With Valid Vertical Temperature Difference Data. Stability Classes Distributed Within Total Hours With Valid Wind Direction, Wind Speed, And Vertical Temperature Difference Data.

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

METEOROLOGY WBNP-102

WATTS BAR WBNP-102 Table 2.3-43 Deleted By Amendment 63 METEOROLOGY 2.3-73

Table 2.3-44 Inversion Persistence Data 2.3-74 Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 93 (Delta-T Given In Degrees Celsius) (Page 1 of 2)

DISREGARDING INVERSION E F G F AND G STRENGTH WATTS BAR NO. 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 2027 1091 527 377 842 3 993 728 337 309 549 4 709 597 302 312 393 5 483 530 286 286 349 6 340 513 189 305 314 7 224 399 159 299 271 8 151 291 103 307 277 9 94 220 118 350 270 10 72 164 89 399 298 11 64 132 87 477 419 12 42 60 53 414 773 13 19 31 40 357 731 14 10 17 34 213 595 15 7 3 6 168 468 16 4 1 2 50 272 17 1 0 0 8 98 18 0 0 0 1 25 19 0 1 0 2 8 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 32 0 0 0 0 0

>=32 0 0 0 0 2*

METEOROLOGY WBNP-102

Table 2.3-44 Inversion Persistence Data 2.3-75 Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 93 (Delta-T Given In Degrees Celsius) (Continued) (Page 2 of 2)

DISREGARDING INVERSION E F G F AND G STRENGTH NO. 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 WATTS BAR TOTAL 5420 4778 2332 4636 6955 Maximum Hours of Persistence 17 19 16 21 45 Meteorological Facility Located 0.8 Km SSW Of Watts Bar Nuclear Plant Temperature Instruments Located 45.63 And 9.51 Meters Above Ground

January 1982 and December 1989 METEOROLOGY WBNP-102

Table 2.3-45 Joint Percentage Frequencies Of Wind Speed By Wind Direction For 2.3-76 Stability Class A (Delta T<=-1.9 C/100 M),

Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 93 Wind Wind Speed (MPH) WATTS BAR Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.000 0.001 0.008 0.021 0.036 0.060 0.003 0.000 0.000 0.129 NNE 0.000 0.001 0.012 0.054 0.074 0.141 0.004 0.000 0.000 0.285 NE 0.000 0.000 0.035 0.088 0.078 0.089 0.000 0.000 0.000 0.289 ENE 0.000 0.001 0.037 0.079 0.071 0.032 0.000 0.000 0.000 0.220 E 0.000 0.002 0.037 0.041 0.015 0.005 0.000 0.000 0.000 0.100 ESE 0.000 0.000 0.016 0.016 0.002 0.001 0.000 0.000 0.000 0.035 SE 0.000 0.001 0.021 0.027 0.005 0.001 0.001 0.000 0.000 0.055 SSE 0.000 0.001 0.042 0.055 0.020 0.013 0.002 0.000 0.000 0.133 S 0.000 0.002 0.058 0.139 0.127 0.129 0.018 0.001 0.000 0.473 SSW 0.000 0.001 0.046 0.257 0.476 0.743 0.113 0.005 0.000 1.639 SW 0.000 0.000 0.018 0.093 0.118 0.102 0.012 0.000 0.000 0.343 WSW 0.000 0.000 0.006 0.016 0.017 0.063 0.021 0.002 0.000 0.125 W 0.000 0.000 0.004 0.010 0.014 0.064 0.014 0.001 0.000 0.106 WNW 0.000 0.000 0.001 0.004 0.007 0.033 0.005 0.000 0.000 0.050 NW 0.000 0.000 0.003 0.005 0.010 0.029 0.006 0.000 0.000 0.052 NNW 0.000 0.001 0.007 0.021 0.035 0.057 0.011 0.000 0.000 0.131 SUBTOTAL 0.001 0.008 0.350 0.925 1.102 1.563 0.210 0.008 0.000 4.166 Total Hours Of Valid Stability Observations 167789 Total Hours Of Stability Class A 6970 Total Hours Of Valid Wind Direction-Wind Speed-Stability Class A 6849 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations 164406 Total Hours Calm 1 Meteorological Facility: Watts Bar Nuclear Plant Stability Based On Delta-T Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 7.21 Date Printed: 20-SEP-94 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY WBNP-102

Table 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 METEOROLOGY Jan 1, 74 - Dec 31, 93 Wind Wind Speed (MPH) WATTS BAR Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.000 0.000 0.021 0.055 0.052 0.080 0.007 0.000 0.000 0.213 NNE 0.000 0.001 0.040 0.108 0.112 0.186 0.012 0.000 0.000 0.458 NE 0.000 0.000 0.069 0.123 0.107 0.086 0.002 0.000 0.000 0.387 ENE 0.000 0.001 0.052 0.101 0.071 0.024 0.000 0.000 0.000 0.249 E 0.000 0.001 0.061 0.055 0.015 0.002 0.000 0.000 0.000 0.133 ESE 0.000 0.002 0.021 0.024 0.002 0.001 0.000 0.000 0.000 0.049 SE 0.000 0.000 0.030 0.028 0.003 0.002 0.001 0.000 0.000 0.064 SSE 0.000 0.001 0.046 0.046 0.013 0.005 0.000 0.000 0.000 0.111 S 0.000 0.001 0.052 0.128 0.077 0.054 0.012 0.002 0.000 0.326 SSW 0.000 0.000 0.068 0.211 0.289 0.238 0.046 0.003 0.000 0.855 SW 0.000 0.000 0.027 0.114 0.080 0.029 0.003 0.000 0.000 0.252 WSW 0.000 0.000 0.007 0.024 0.026 0.023 0.007 0.000 0.000 0.085 W 0.000 0.000 0.005 0.010 0.023 0.049 0.012 0.001 0.000 0.099 WNW 0.000 0.000 0.005 0.005 0.019 0.060 0.007 0.000 0.000 0.097 NW 0.000 0.000 0.007 0.013 0.023 0.063 0.005 0.001 0.000 0.112 NNW 0.000 0.000 0.008 0.027 0.033 0.081 0.010 0.001 0.000 0.161 Subtotal 0.000 0.006 0.519 1.072 0.944 0.982 0.123 0.007 0.000 3.654 Total Hours Of Valid Stability Observations 167789 Total Hours Of Stability Class B 6109 Total Hours Of Valid Wind Direction-Wind Speed-Stability Class B 6007 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations 166406 Total Hours Calm 0 Meteorological Facility: Watts Bar Nuclear Plant Stability Based On Delta-T Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 6.38 Date Printed: 20-SEP-94 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-77 WBNP-102

Table 2.3-47 Joint Percentage Frequencies Of Wind Speed By Wind Direction For 2.3-78 Stability Class C (-1.7< Delta T<=-1.5 C/100 M),

Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 93 Wind Wind Speed (MPH) WATTS BAR Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.000 0.001 0.041 0.099 0.117 0.154 0.008 0.000 0.000 0.419 NNE 0.000 0.001 0.099 0.205 0.221 0.292 0.019 0.000 0.000 0.837 NE 0.000 0.002 0.130 0.234 0.163 0.128 0.001 0.000 0.000 0.658 ENE 0.000 0.001 0.117 0.172 0.082 0.027 0.001 0.000 0.000 0.400 E 0.000 0.004 0.101 0.126 0.022 0.005 0.001 0.000 0.000 0.258 ESE 0.000 0.002 0.041 0.040 0.004 0.000 0.000 0.000 0.000 0.088 SE 0.000 0.001 0.055 0.056 0.008 0.001 0.002 0.000 0.000 0.123 SSE 0.000 0.001 0.085 0.109 0.029 0.012 0.004 0.000 0.000 0.238 S 0.000 0.001 0.116 0.245 0.114 0.068 0.017 0.001 0.000 0.561 SSW 0.000 0.001 0.099 0.418 0.375 0.268 0.062 0.004 0.000 1.227 SW 0.000 0.001 0.049 0.193 0.103 0.036 0.007 0.000 0.000 0.388 WSW 0.000 0.001 0.021 0.057 0.037 0.023 0.009 0.000 0.000 0.148 W 0.000 0.001 0.018 0.027 0.050 0.060 0.011 0.002 0.000 0.169 WNW 0.000 0.000 0.011 0.022 0.038 0.113 0.018 0.000 0.000 0.201 NW 0.000 0.000 0.020 0.040 0.051 0.144 0.015 0.001 0.000 0.270 NNW 0.000 0.000 0.024 0.056 0.081 0.129 0.011 0.000 0.000 0.301 Subtotal 0.000 0.015 1.027 2.097 1.494 1.460 0.184 0.009 0.000 6.286 Total Hours Of Valid Stability Observations 167789 Total Hours Of Stability Class C 10556 Total Hours Of Valid Wind Direction-Wind Speed-Stability Class C 10335 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations 164406 Total Hours Calm 0 Meteorological Facility: Watts Bar Nuclear Plant Stability Based On Delta-T Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 6.06 Date Printed: 20-SEP-94 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY WBNP-102

Table 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 METEOROLOGY Jan 1, 74 - Dec 31, 93 Wind Wind Speed (MPH) WATTS BAR 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 0.005 0.046 0.502 0.875 0.967 1.190 0.046 0.000 0.000 3.631 NNE 0.006 0.043 0.584 1.226 1.348 1.457 0.063 0.000 0.000 4.728 NE 0.008 0.067 0.727 1.043 0.615 0.355 0.009 0.001 0.000 2.824 ENE 0.010 0.108 0.859 0.585 0.159 0.052 0.001 0.000 0.000 1.773 E 0.007 0.135 0.568 0.260 0.064 0.016 0.000 0.000 0.000 1.050 ESE 0.003 0.070 0.245 0.082 0.013 0.007 0.000 0.000 0.000 0.420 SE 0.005 0.078 0.378 0.151 0.029 0.023 0.007 0.000 0.000 0.670 SSE 0.007 0.130 0.591 0.256 0.052 0.046 0.018 0.002 0.000 1.102 S 0.011 0.133 0.991 0.816 0.339 0.294 0.100 0.011 0.001 2.697 SSW 0.014 0.106 1.259 1.837 1.071 1.119 0.246 0.021 0.000 5.671 SW 0.009 0.129 0.784 0.742 0.249 0.151 0.018 0.001 0.001 2.084 WSW 0.006 0.083 0.498 0.335 0.170 0.121 0.029 0.001 0.000 1.242 W 0.005 0.095 0.408 0.336 0.347 0.409 0.044 0.002 0.000 1.647 WNW 0.004 0.098 0.325 0.359 0.436 0.571 0.055 0.003 0.000 1.851 NW 0.004 0.080 0.341 0.398 0.530 0.748 0.069 0.001 0.000 2.171 NNW 0.004 0.048 0.369 0.526 0.626 0.903 0.047 0.000 0.000 2.523 SUBTOTAL 0.108 1.450 9.428 9.828 7.014 7.463 0.751 0.042 0.002 36.085 Total Hours Of Valid Stability Observations 167789 Total Hours Of Stability Class D 60302 Total Hours Of Valid Wind Direction-Wind Speed-Stability Class D 59326 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations 164406 Total Hours Calm 177 Meteorological Facility: Watts Bar Nuclear Plant Stability Based On Delta-T Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 5.37 Date Printed: 20-SEP-94 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-79 WBNP-102

Table 2.3-49 Joint Percentage Frequencies Of Wind Speed By Wind Direction For 2.3-80 Stability Class E (-0.5< Delta T<= 1.5 C/100 M),

Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 93 Wind Wind Speed (MPH) WATTS BAR 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 0.030 0.164 0.499 0.599 0.274 0.083 0.002 0.000 0.000 1.650 NNE 0.025 0.138 0.415 0.422 0.213 0.070 0.003 0.000 0.000 1.286 NE 0.030 0.156 0.513 0.266 0.088 0.030 0.000 0.000 0.000 1.085 ENE 0.057 0.280 0.988 0.290 0.040 0.009 0.001 0.000 0.000 1.663 E 0.034 0.304 0.461 0.083 0.016 0.010 0.001 0.000 0.000 0.910 ESE 0.013 0.148 0.147 0.028 0.007 0.002 0.001 0.000 0.000 0.347 SE 0.019 0.208 0.209 0.049 0.030 0.021 0.004 0.000 0.000 0.539 SSE 0.039 0.341 0.519 0.114 0.059 0.066 0.014 0.001 0.000 1.152 S 0.067 0.450 1.037 0.478 0.206 0.186 0.061 0.007 0.000 2.492 SSW 0.090 0.505 1.499 1.117 0.743 0.751 0.148 0.016 0.000 4.869 SW 0.071 0.566 1.008 0.300 0.176 0.131 0.021 0.002 0.000 2.274 WSW 0.063 0.651 0.764 0.178 0.106 0.071 0.010 0.001 0.000 1.844 W 0.059 0.671 0.645 0.222 0.111 0.067 0.008 0.000 0.000 1.783 WNW 0.055 0.626 0.595 0.214 0.091 0.037 0.002 0.001 0.000 1.622 NW 0.059 0.652 0.664 0.256 0.111 0.049 0.002 0.000 0.000 1.793 NNW 0.039 0.349 0.512 0.308 0.146 0.075 0.002 0.000 0.000 1.430 SUBTOTAL 0.748 6.208 10.478 4.925 2.415 1.658 0.280 0.028 0.000 26.739 Total Hours Of Valid Stability Observations 167789 Total Hours Of Stability Class E 44969 Total Hours Of Valid Wind Direction-Wind Speed-Stability Class E 43961 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations 164406 Total Hours Calm 1229 Meteorological Facility: Watts Bar Nuclear Plant Stability Based On Delta-T Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 3.28 Date Printed: 20-SEP-94 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY WBNP-102

Table 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 METEOROLOGY Jan 1, 74 - Dec 31, 93 Wind Wind Speed (MPH) WATTS BAR 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 0.288 0.245 0.027 0.006 0.001 0.000 0.000 0.000 0.617 NNE 0.043 0.229 0.219 0.027 0.001 0.001 0.000 0.000 0.000 0.519 NE 0.054 0.246 0.318 0.025 0.002 0.001 0.000 0.000 0.000 0.645 ENE 0.087 0.345 0.567 0.058 0.002 0.002 0.000 0.000 0.000 1.062 E 0.046 0.286 0.200 0.010 0.001 0.001 0.000 0.000 0.000 0.544 ESE 0.016 0.120 0.048 0.001 0.000 0.000 0.000 0.000 0.000 0.185 SE 0.023 0.159 0.082 0.005 0.001 0.000 0.000 0.000 0.000 0.270 SSE 0.042 0.254 0.189 0.018 0.002 0.002 0.000 0.000 0.000 0.508 S 0.061 0.338 0.304 0.040 0.005 0.004 0.000 0.000 0.000 0.751 SSW 0.078 0.387 0.435 0.175 0.063 0.013 0.000 0.000 0.000 1.151 SW 0.096 0.517 0.498 0.064 0.018 0.005 0.001 0.000 0.000 1.199 WSW 0.126 0.738 0.588 0.038 0.007 0.001 0.000 0.000 0.000 1.497 W 0.131 0.884 0.499 0.028 0.001 0.001 0.000 0.000 0.000 1.544 WNW 0.126 0.937 0.393 0.024 0.002 0.001 0.000 0.000 0.000 1.483 NW 0.184 1.225 0.707 0.041 0.004 0.002 0.001 0.000 0.000 2.163 NNW 0.099 0.644 0.398 0.030 0.004 0.000 0.000 0.000 0.000 1.175 SUBTOTAL 1.262 7.598 5.688 0.609 0.119 0.035 0.002 0.000 0.000 15.311 Total Hours Of Valid Stability Observations 166789 Total Hours Of Stability Class F 25805 Total Hours Of Valid Wind Direction-Wind Speed-Stability Class F 25173 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations 164406 Total Hours Calm 2075 Meteorological Facility: Watts Bar Nuclear Plant Stability Based On Delta-T Between 9.51 and 45.63 Meters Wind Speed And Direction Measured At 9.72 Meter Level Mean Wind Speed = 1.53 Date Printed: 20-SEP-94 NOTE: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-81 WBNP-102

Table 2.3-51 Joint Percentage Frequencies Of Wind Speed By Wind Direction For 2.3-82 Stability Class G (Delta T > 4.0 C/100 M),

Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 93 Wind Wind Speed (MPH) WATTS BAR 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 0.034 0.195 0.066 0.001 0.000 0.000 0.000 0.000 0.000 0.296 NNE 0.038 0.196 0.095 0.002 0.000 0.000 0.000 0.000 0.000 0.331 NE 0.054 0.257 0.161 0.001 0.000 0.000 0.000 0.000 0.000 0.473 ENE 0.091 0.376 0.327 0.008 0.000 0.001 0.000 0.000 0.000 0.803 E 0.047 0.257 0.105 0.002 0.000 0.000 0.000 0.000 0.000 0.410 ESE 0.015 0.095 0.024 0.000 0.000 0.000 0.000 0.000 0.000 0.135 SE 0.027 0.159 0.049 0.000 0.000 0.000 0.000 0.000 0.000 0.235 SSE 0.031 0.176 0.065 0.002 0.000 0.000 0.000 0.000 0.000 0.274 S 0.035 0.192 0.075 0.005 0.002 0.000 0.000 0.000 0.000 0.308 SSW 0.042 0.217 0.107 0.012 0.002 0.000 0.000 0.000 0.000 0.379 SW 0.053 0.278 0.130 0.005 0.000 0.000 0.000 0.000 0.000 0.466 WSW 0.089 0.436 0.251 0.007 0.000 0.000 0.000 0.000 0.000 0.782 W 0.094 0.464 0.260 0.005 0.000 0.000 0.000 0.000 0.000 0.823 WNW 0.075 0.406 0.172 0.004 0.000 0.000 0.000 0.000 0.000 0.656 NW 0.101 0.517 0.264 0.010 0.001 0.000 0.000 0.000 0.000 0.893 NNW 0.056 0.306 0.128 0.003 0.000 0.000 0.000 0.000 0.000 0.494 SUBTOTAL 0.881 4.525 2.280 0.068 0.004 0.001 0.000 0.000 0.000 7.758 Total Hours Of Valid Stability Observations 167789 Total Hours Of Stability Class G 13078 Total Hours Of Valid Wind Direction-Wind Speed-Stability Class G 12755 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations 164406 Total Hours Calm 1448 Meteorological facility: Watts Bar Nuclear Plant Stability Based On Delta-T Between 9.51 And 45.63 Meters Wind Speed And Direction Measured at 9.72 Meter Level Mean Wind Speed = 1.23 Date Printed: 20-SEP-94 NOTE: Totals And Subtotals AreObtained From Unrounded Numbers METEOROLOGY WBNP-102

Table 2.3-52 Joint Percentage Frequencies Of Wind Speed By Stability Class, Watts Bar Nuclear Plant Jan 1, 74 - Dec 31, 93 WIND SPEED STABILITY CLASS METEOROLOGY (MPH) A B C D E F G WATTS BAR CALM 0.001 0.000 0.000 0.108 0.748 1.262 0.881 0.6-1.4 0.008 0.006 0.015 1.450 6.208 7.598 4.525 1.5-3.4 0.350 0.519 1.027 9.428 10.478 5.688 2.280 3.5-5.4 0.925 1.072 2.097 9.828 4.925 0.609 0.068 5.5-7.4 1.102 0.944 1.494 7.014 2.415 0.119 0.004 7.5-12.4 1.563 0.982 1.460 7.463 1.658 0.035 0.001 12.5-18.4 0.210 0.123 0.184 0.751 0.280 0.001 0.000 18.5-24.4 0.008 0.007 0.009 0.042 0.028 0.000 0.000

>=24.5 0.000 0.000 0.000 0.001 0.000 0.000 0.000 TOTAL 4.166 3.654 6.286 36.085 26.739 15.311 7.758 Total Hours Of Valid Stability Observations 167789 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations 164406 Total Hours Of Observations 175320 Joint Recoverability Percentage 93.8 Meteorological Facility: Watts Bar Nuclear Plant Stability Based On Delta-T Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 9.72 Meter Level Date Printed: 20-SEP-94 2.3-83 WBNP-102

Table 2.3-53 Joint Percentage Frequencies Of Wind Speed By Wind Direction For 2.3-84 Stability Class A (Delta T<=-1.9 C/100 M),

Watts Bar Nuclear Plant Jan 1, 77 - Dec 31, 93 Wind Wind Speed (Mph) WATTS BAR Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.000 0.000 0.006 0.019 0.029 0.072 0.016 0.001 0.000 0.144 NNE 0.000 0.001 0.011 0.036 0.071 0.136 0.019 0.000 0.000 0.275 NE 0.000 0.002 0.032 0.066 0.091 0.128 0.009 0.000 0.000 0.327 ENE 0.000 0.001 0.035 0.073 0.076 0.072 0.003 0.000 0.000 0.261 E 0.000 0.001 0.022 0.036 0.016 0.007 0.000 0.000 0.000 0.082 ESE 0.000 0.001 0.014 0.021 0.003 0.003 0.000 0.000 0.000 0.042 SE 0.000 0.001 0.016 0.025 0.003 0.001 0.001 0.000 0.000 0.047 SSE 0.000 0.001 0.027 0.049 0.016 0.016 0.004 0.001 0.000 0.114 S 0.000 0.000 0.037 0.087 0.058 0.091 0.028 0.005 0.000 0.307 SSW 0.000 0.001 0.032 0.161 0.261 0.699 0.347 0.056 0.006 1.564 SW 0.000 0.000 0.014 0.080 0.150 0.334 0.141 0.019 0.000 0.736 WSW 0.000 0.001 0.004 0.009 0.016 0.046 0.056 0.024 0.008 0.165 W 0.000 0.000 0.001 0.003 0.005 0.032 0.039 0.002 0.003 0.085 WNW 0.000 0.000 0.001 0.003 0.001 0.023 0.036 0.001 0.000 0.066 NW 0.000 0.001 0.001 0.002 0.002 0.019 0.014 0.002 0.000 0.041 NNW 0.000 0.001 0.004 0.009 0.014 0.043 0.016 0.001 0.000 0.088 SUBTOTAL 0.001 0.011 0.258 0.680 0.813 1.721 0.728 0.114 0.017 4.343 Total Hours Of Valid Stability Observations 144312 Total Hours Of Stability Class A 6198 Total Hours Of Valid Wind Direction-Wind Speed-Stability Class A 6089 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations 140205 Total Hours Calm 2 Meteorological Facility: Watts Bar Nuclear Plant Stability Based On Delta-T Between 9.51 and 45.63 Meters Wind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 9.02 Date Printed: 29-NOV-94 NOTE: Total And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY WBNP-102

Table 2.3-54 Joint Percentage Frequencies Of Wind Speed By Wind Direction For Stability Class B (-1.9< Delta T<=-1.7 C/100 M), Watts Bar Nuclear Plant Jan 1, 77 - Dec 31, 93 Wind Wind Speed(MPH)

METEOROLOGY 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 WATTS BAR N 0.000 0.001 0.024 0.037 0.051 0.103 0.019 0.001 0.000 0.237 NNE 0.000 0.001 0.039 0.083 0.091 0.198 0.041 0.000 0.000 0.453 NE 0.000 0.000 0.055 0.125 0.106 0.138 0.012 0.000 0.000 0.437 ENE 0.000 0.002 0.075 0.093 0.088 0.064 0.001 0.000 0.000 0.324 E 0.000 0.001 0.036 0.044 0.020 0.006 0.001 0.000 0.000 0.108 ESE 0.000 0.001 0.016 0.028 0.003 0.001 0.000 0.000 0.000 0.049 SE 0.000 0.000 0.020 0.029 0.006 0.003 0.001 0.001 0.000 0.059 SSE 0.000 0.001 0.031 0.049 0.009 0.008 0.001 0.000 0.000 0.098 S 0.000 0.000 0.034 0.078 0.049 0.044 0.010 0.004 0.001 0.220 SSW 0.000 0.001 0.050 0.160 0.178 0.293 0.111 0.029 0.004 0.826 SW 0.000 0.000 0.021 0.103 0.148 0.161 0.044 0.007 0.002 0.486 WSW 0.000 0.000 0.005 0.014 0.016 0.045 0.015 0.008 0.001 0.105 W 0.000 0.000 0.004 0.005 0.005 0.040 0.031 0.009 0.001 0.093 WNW 0.000 0.000 0.004 0.004 0.006 0.063 0.039 0.001 0.001 0.117 NW 0.000 0.000 0.002 0.009 0.006 0.056 0.024 0.001 0.001 0.098 NNW 0.000 0.000 0.005 0.016 0.024 0.068 0.039 0.004 0.001 0.155 SUBTOTAL 0.001 0.007 0.422 0.876 0.806 1.292 0.387 0.063 0.011 3.866 Total Hours Of Valid Stability Observations 144312 Total Hours Of Stability Class B 5522 Total Hours Of Valid Wind Direction-Wind Speed-Stability Class B 5420 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations 140205 Total Hours Calm 1 Meteorological Facility: Watts Bar Nuclear Plant Stability Based On Delta-T Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 7.71 Date Printed: 29-NOV-94 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-85 WBNP-102

2.3-86 Table 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, 93 Wind Wind Speed (MPH)

WATTS BAR Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total N 0.000 0.001 0.030 0.087 0.091 0.178 0.039 0.001 0.000 0.427 NNE 0.000 0.002 0.068 0.138 0.178 0.314 0.070 0.000 0.000 0.770 NE 0.000 0.004 0.122 0.215 0.172 0.201 0.016 0.000 0.000 0.730 ENE 0.000 0.004 0.133 0.168 0.123 0.049 0.006 0.000 0.000 0.482 E 0.000 0.001 0.048 0.087 0.018 0.009 0.000 0.000 0.000 0.163 ESE 0.000 0.001 0.031 0.051 0.007 0.002 0.000 0.000 0.000 0.092 SE 0.000 0.001 0.044 0.044 0.006 0.001 0.003 0.001 0.000 0.101 SSE 0.000 0.001 0.049 0.078 0.027 0.014 0.006 0.001 0.000 0.176 S 0.000 0.001 0.070 0.127 0.068 0.057 0.020 0.009 0.001 0.352 SSW 0.000 0.003 0.076 0.270 0.270 0.331 0.115 0.028 0.004 1.096 SW 0.000 0.001 0.039 0.165 0.193 0.192 0.037 0.011 0.001 0.638 WSW 0.000 0.001 0.015 0.036 0.033 0.048 0.020 0.009 0.001 0.163 W 0.000 0.000 0.011 0.016 0.019 0.059 0.023 0.005 0.001 0.135 WNW 0.000 0.000 0.006 0.011 0.026 0.106 0.067 0.011 0.000 0.226 NW 0.000 0.001 0.011 0.020 0.024 0.132 0.051 0.001 0.000 0.239 NNW 0.000 0.001 0.020 0.031 0.041 0.121 0.045 0.002 0.000 0.262 SUBTOTAL 0.001 0.022 0.772 1.544 1.296 1.814 0.516 0.078 0.009 6.051 Total Hours Of Valid Stability Observations 144312 Total Hours Of Stability Class C 8714 Total Hours Of Valid Wind Direction-wind Speed-stability Class C 8484 Total Hours Of Valid Wind Direction-wind Speed-stability Observations 140205 Total Hours Calm 1 Meteorological Facility: Watts Bar Nuclear Plant Stability Based On Delta-t Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 7.24 Date Printed: 29-NOV-94 METEOROLOGY Note: Totals And Subtotals Are Obtained From Unrounded Numbers WBNP-102

Table 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 Jan 1, 77 - Dec 31, 93 Wind Wind Speed(MPH)

METEOROLOGY 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 WATTS BAR N 0.006 0.047 0.324 0.516 0.633 1.831 0.384 0.009 0.000 3.749 NNE 0.008 0.068 0.435 0.852 1.134 1.933 0.294 0.007 0.000 4.731 NE 0.012 0.101 0.718 1.040 0.901 0.962 0.088 0.001 0.000 3.822 ENE 0.012 0.116 0.660 0.569 0.310 0.164 0.012 0.000 0.000 1.843 E 0.008 0.102 0.402 0.215 0.104 0.043 0.004 0.000 0.000 0.878 ESE 0.004 0.058 0.213 0.107 0.021 0.013 0.002 0.000 0.000 0.419 SE 0.004 0.059 0.240 0.150 0.038 0.037 0.008 0.004 0.000 0.539 SSE 0.007 0.086 0.393 0.247 0.068 0.066 0.039 0.009 0.000 0.914 S 0.010 0.085 0.588 0.553 0.271 0.285 0.133 0.044 0.006 1.976 SSW 0.014 0.083 0.824 1.378 1.026 1.387 0.718 0.145 0.016 5.590 SW 0.009 0.063 0.558 0.880 0.622 0.745 0.238 0.038 0.009 3.162 WSW 0.006 0.061 0.361 0.331 0.210 0.302 0.118 0.020 0.006 1.416 W 0.005 0.068 0.233 0.194 0.188 0.484 0.198 0.030 0.002 1.402 WNW 0.004 0.052 0.185 0.188 0.257 0.867 0.277 0.017 0.000 1.847 NW 0.004 0.054 0.230 0.215 0.356 0.964 0.279 0.020 0.001 2.123 NNW 0.004 0.039 0.226 0.306 0.383 1.080 0.335 0.012 0.000 2.385 SUBTOTAL 0.116 1.144 6.589 7.742 6.522 11.162 3.128 0.356 0.039 36.798 Total Hours Of Valid Stability Observations 144312 Total Hours Of Stability Class D 52796 Total Hours Of Valid Wind Direction-Wind Speed-Stability Class D 51592 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations 140205 Total Hours Calm 162 Meteorological Facility: Watts Bar Nuclear Plant Stability Based On Delta-T Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 6.93 Date Printed: 29-NOV-94 Note: Totals And Subtotals Are Obtained From Unrounded Numbers 2.3-87 WBNP-102

Table 2.3-57 Joint Percentage Frequencies Of Wind Speed By Wind Direction For 2.3-88 Stability Class E (-0.5< Delta T<= 1.5 C/100 M), Watts Bar Nuclear Plant Jan 1, 77 - Dec 31, 93 Wind Wind Speed(Mph)

Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total WATTS BAR N 0.030 0.168 0.363 0.275 0.415 0.595 0.019 0.000 0.000 1.865 NNE 0.051 0.242 0.655 0.561 0.436 0.337 0.007 0.000 0.000 2.288 NE 0.070 0.336 0.893 0.540 0.273 0.123 0.004 0.000 0.000 2.239 ENE 0.054 0.336 0.622 0.216 0.070 0.039 0.003 0.000 0.000 1.339 E 0.031 0.270 0.281 0.082 0.034 0.021 0.003 0.000 0.000 0.722 ESE 0.017 0.157 0.137 0.056 0.019 0.006 0.000 0.001 0.000 0.393 SE 0.017 0.133 0.166 0.062 0.037 0.046 0.012 0.003 0.000 0.476 SSE 0.032 0.205 0.359 0.155 0.073 0.120 0.049 0.008 0.000 1.002 S 0.058 0.275 0.749 0.509 0.311 0.340 0.126 0.032 0.006 2.406 SSW 0.080 0.303 1.108 1.282 1.081 1.430 0.575 0.099 0.003 5.961 SW 0.044 0.205 0.575 0.538 0.439 0.729 0.223 0.026 0.003 2.782 WSW 0.025 0.168 0.277 0.225 0.159 0.255 0.083 0.010 0.001 1.202 W 0.020 0.124 0.220 0.127 0.133 0.211 0.037 0.004 0.000 0.875 WNW 0.016 0.121 0.170 0.135 0.123 0.160 0.016 0.001 0.000 0.741 NW 0.018 0.121 0.203 0.138 0.205 0.205 0.019 0.001 0.000 0.910 NNW 0.018 0.118 0.196 0.149 0.183 0.223 0.023 0.000 0.000 0.910 SUBTOTAL 0.581 3.281 6.976 5.049 3.992 4.840 1.198 0.184 0.012 26.112 Total Hours Of Valid Stability Observations 144312 Total Hours Of Stability Class E 37823 Total Hours Of Valid Wind Direction-Wind Speed-Stability Class E 36611 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations 140205 Total Hours Calm 814 Meteorological Facility: Watts Bar Nuclear Plant Stability Based On Delta-T Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 5.17 Date Printed: 29-NOV-94 METEOROLOGY Note: Totals And Subtotals Are Obtained From Unrounded Numbers WBNP-102

Table 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 Jan 1, 77 - Dec 31, 93 Wind Wind Speed (MPH)

METEOROLOGY 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 WATTS BAR N 0.057 0.223 0.333 0.142 0.086 0.032 0.001 0.000 0.000 0.875 NNE 0.110 0.314 0.757 0.388 0.147 0.031 0.000 0.000 0.000 1.747 NE 0.147 0.469 0.964 0.293 0.059 0.010 0.000 0.000 0.000 1.943 ENE 0.105 0.377 0.645 0.071 0.006 0.001 0.000 0.000 0.000 1.207 E 0.049 0.291 0.190 0.010 0.003 0.002 0.000 0.000 0.000 0.546 ESE 0.023 0.151 0.072 0.008 0.002 0.000 0.000 0.000 0.000 0.256 SE 0.026 0.150 0.106 0.018 0.009 0.004 0.000 0.000 0.000 0.314 SSE 0.050 0.206 0.278 0.061 0.016 0.016 0.000 0.000 0.000 0.626 S 0.094 0.297 0.617 0.254 0.086 0.046 0.001 0.001 0.000 1.397 SSW 0.111 0.270 0.814 0.689 0.450 0.334 0.029 0.000 0.000 2.698 SW 0.066 0.240 0.405 0.208 0.130 0.173 0.027 0.001 0.000 1.251 WSW 0.037 0.153 0.205 0.079 0.056 0.056 0.004 0.001 0.000 0.591 W 0.033 0.168 0.155 0.049 0.032 0.019 0.001 0.000 0.000 0.458 WNW 0.026 0.150 0.106 0.046 0.025 0.015 0.000 0.000 0.000 0.369 NW 0.028 0.132 0.136 0.060 0.038 0.018 0.001 0.000 0.000 0.412 NNW 0.033 0.155 0.165 0.066 0.053 0.020 0.001 0.000 0.000 0.493 SUBTOTAL 0.997 3.749 5.950 2.442 1.198 0.777 0.066 0.003 0.000 15.182 Total Hours Of Valid Stability Observations 144312 Total Hours Of Stability Class F 22122 Total Hours Of Valid Wind Direction-Wind Speed-Stability Class F 21286 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations 140205 Total Hours Calm 1398 Meteorological Facility: Watts Bar Nuclear Plant Stability Based On Delta-T Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 2.91 Date Printed: 29-NOV-94 Note: Totals and Subtotals are Obtained from Unrounded Numbers 2.3-89 WBNP-102

Table 2.3-59 Joint Percentage Frequencies Of Wind Speed By Wind Direction For 2.3-90 Stability Class G (Delta T > 4.0 C/100 M) Watts, Bar Nuclear Plant Jan 1, 77 - Dec 31, 93 Wind Wind Speed (MPH)

Direction Calm 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4 >=24.5 Total WATTS BAR N 0.023 0.123 0.205 0.087 0.017 0.009 0.000 0.000 0.000 0.465 NNE 0.041 0.185 0.415 0.195 0.066 0.009 0.000 0.000 0.000 0.912 NE 0.063 0.238 0.674 0.208 0.034 0.004 0.000 0.000 0.000 1.220 ENE 0.043 0.179 0.439 0.053 0.001 0.001 0.000 0.000 0.000 0.715 E 0.014 0.109 0.087 0.004 0.000 0.001 0.000 0.000 0.000 0.215 ESE 0.006 0.051 0.038 0.006 0.000 0.000 0.000 0.000 0.000 0.101 SE 0.007 0.046 0.049 0.005 0.003 0.001 0.000 0.000 0.000 0.111 SSE 0.018 0.081 0.175 0.035 0.009 0.003 0.000 0.000 0.000 0.319 S 0.033 0.113 0.367 0.178 0.043 0.011 0.000 0.000 0.000 0.745 SSW 0.032 0.092 0.376 0.424 0.218 0.091 0.002 0.000 0.000 1.235 SW 0.018 0.081 0.175 0.108 0.046 0.034 0.001 0.000 0.000 0.463 WSW 0.012 0.065 0.113 0.044 0.023 0.009 0.000 0.000 0.000 0.265 W 0.011 0.068 0.091 0.027 0.016 0.008 0.000 0.000 0.000 0.220 WNW 0.010 0.070 0.069 0.027 0.010 0.004 0.000 0.000 0.000 0.189 NW 0.011 0.082 0.080 0.041 0.015 0.004 0.000 0.000 0.000 0.233 NNW 0.012 0.073 0.096 0.041 0.018 0.001 0.000 0.000 0.000 0.240 SUBTOTAL 0.353 1.655 3.449 1.484 0.517 0.188 0.003 0.000 0.000 7.648 Total Hours Of Valid Stability Observations 144312 Total Hours Of Stability Class G 11137 Total Hours Of Valid Wind Direction-Wind Speed-Stability Class G 10723 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations 140205 Total Hours Calm 495 Meteorological Facility: Watts Bar Nuclear Plant Stability Based On Delta-T Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 46.36 Meter Level Mean Wind Speed = 2.78 Date Printed: 29-NOV-94 Note: Totals And Subtotals Are Obtained From Unrounded Numbers METEOROLOGY WBNP-102

Table 2.3-60 Joint Percentage Frequencies Of Wind Speed By Stability Class, Watts Bar Nuclear Plant Jan 1, 77 - Dec 31, 93 Wind Speed Stability Class METEOROLOGY (MPH) A B C D E F G WATTS BAR CALM 0.001 0.001 0.001 0.116 0.581 0.997 0.353 0.6-1.4 0.011 0.007 0.022 1.144 3.281 3.749 1.655 1.5-3.4 0.258 0.422 0.772 6.589 6.976 5.950 3.449 3.5-5.4 0.680 0.876 1.544 7.742 5.049 2.442 1.484 5.5-7.4 0.813 0.806 1.296 6.522 3.992 1.198 0.517 7.5-12.4 1.721 1.292 1.814 11.162 4.840 0.777 0.188 12.5-18.4 0.728 0.387 0.516 3.128 1.198 0.066 0.003 18.5-24.4 0.114 0.063 0.078 0.356 0.184 0.003 0.000

>=24.5 0.017 0.011 0.009 0.039 0.012 0.000 0.000 TOTAL 4.343 3.866 6.051 36.798 26.112 15.182 7.648 Total Hours Of Valid Stability Observations 144312 Total Hours Of Valid Wind Direction-Wind Speed-Stability Observations 140205 Total Hours Of Observations 149016 Joint Recoverability Percentage 94.1 Meteorological Facility: Watts Bar Nuclear Plant Stability Based On t Between 9.51 And 45.63 Meters Wind Speed And Direction Measured At 46.36 Meter Level Date Printed: 29-NOV-94 2.3-91 WBNP-102

WATTS BAR WBNP-102 Table 2.3-61 Calculated 1-hour Average Atmospheric Dispersion Factors (X/q) At Minimum Distance (1100 Meters) Between Release Zone (100 M Radius) And Exclusion Area Boundary (1200 M Radius) For Watts Bar Nuclear Plant (Sheet 1 of 1)

Based on RG 1.145 and Meteorological Data for 1974 Through 1988*

Plume Sector 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.

2.3-92 METEOROLOGY

WATTS BAR WBNP-102 Table 2.3-61a Calculated 1-hour Average Atmospheric Dispersion Factors (X/q) At Minimum Distance (1100 Meters) Between Release Zone (100 M Radius) And Exclusion Area Boundary (1200 M Radius) For Watts Bar Nuclear Plant (Sheet 1 of 1)

Based On Rg 1.145 And Meteorological Data For 1974 Through 1993*

Plume Sector 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.

METEOROLOGY 2.3-93

WATTS BAR WBNP-102 Table 2.3-62 Calculated 1-hour Average And Annual Average Atmospheric Dispersion Factors (X/q) At Low Population Zone Distance (4828 Meters) For Watts Bar Nuclear 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.

2.3-94 METEOROLOGY

WATTS BAR WBNP-102 Table 2.3-62a Calculated 1-hour Average And Annual Average Atmospheric Dispersion Factors (X/q) At Low Population Zone Distance (4828 Meters) For Watts Bar Nuclear 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.

METEOROLOGY 2.3-95

WATTS BAR WBNP-102 Table 2.3-63 Values Of 5th Percentile Overall Site 8-hour, 16-hour, 3-day, And 26-day Atmospheric Dispersion Factors (X/q) At Low Population Zone Distance (4828 Meters) For Watts Bar Nuclear 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.

2.3-96 METEOROLOGY

WATTS BAR WBNP-102 Table 2.3-63a VALUES OF 5TH PERCENTILE OVERALL SITE 8-HOUR, 16-HOUR, 3-DAY, AND 26-DAY ATMOSPHERIC DISPERSION FACTORS (X/Q) AT LOW POPULATION ZONE DISTANCE (4828 METERS) FOR WATTS BAR NUCLEAR 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.

METEOROLOGY 2.3-97

WATTS BAR WBNP-102 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)

Plume 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.

2.3-98 METEOROLOGY

WATTS BAR WBNP-102 Table 2.3-65 0.5th Percentile Sector Values Of 8-hour, 16-hour, 3-day, And 26-day Atmospheric Dispersion Factors (X/q) At Low Population Zone Outer Boundary Distance (4828 Meters) For Watts Bar Nuclear 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)

Plume 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.

METEOROLOGY 2.3-99

WATTS BAR WBNP-102 Table 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)

A. 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 B. 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 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months and corresponding sector annual average value at 8760 hours0.101 days 2.433 hours 0.0145 weeks 0.00333 months 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.

2.3-100 METEOROLOGY

WATTS BAR WBNP-102 Table 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 A. 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-34 0.160E-34 2-8 - 0.844E-44 8-24 - 0.854E-5 24-96 - 0.455E-5 96-720 - 0.198E-5 B. 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 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months and corresponding sector annual average value at 8760 hours0.101 days 2.433 hours 0.0145 weeks 0.00333 months 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-3 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.

METEOROLOGY 2.3-101

WATTS BAR WBNP-102 Table 2.3-67 Dispersion Meteorology - Onsite 10-meter Wind Data - 5th Percentile Values Of Inverse Wind Speed (1/u) Distributions For Post-loca Control Bay Dose Calculations For Watts Bar Nuclear Plant A. 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 B. 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 NOTE: 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.

2.3-102 METEOROLOGY

WATTS BAR WBNP-102 Table 2.3-67a Dispersion Meteorology - Onsite 10-meter Wind Data - 5th Percentile Values Of Inverse Wind Speed (1/u) Distributions For Post-loca Control Bay Dose Calculations For Watts Bar Nuclear Plant A. 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 B. 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 NOTE: 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.

METEOROLOGY 2.3-103

WATTS BAR WBNP-102 THIS PAGE INTENTIONALLY LEFT BLANK 2.3-104 METEOROLOGY

WATTS BAR WBNP-102 Figure 2.3-1 Normal Sea Level Pressure Distribution Over North America and The North Atlantic Ocean METEOROLOGY 2.3-105

WATTS BAR WBNP-102 Figure 2.3-2 Total Number of Forecast-Days of High Meteorological Potential For Air Pollution in a 5 Year Period METEOROLOGY 2.3-106

METEOROLOGY WATTS BAR Figure 2.3-3 Climatological Data Sources in Area Around Watts Bar Site WBNP-102 2.3-107

METEOROLOGY WATTS BAR Figure 2.3-4 Wind Speed at 9.72 Meters All Stability classes, Watts Bar Nuclear Plant, January 1, 1974 -December 31, 1993 WBNP-102 2.3-108

METEOROLOGY WATTS BAR Figure 2.3-5 Wind Speed at 46.36 Meters All Stability Classes, Watts Bar Nuclear Plant, January 1, 1977 -December 31, 1993 WBNP-102 2.3-109

METEOROLOGY WATTS BAR 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-102 2.3-110

METEOROLOGY WATTS BAR 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-102 2.3-111

METEOROLOGY WATTS BAR Figure 2.3-7 Wind Speed at 9.72 Meters for Stability Class A, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993 WBNP-102 2.3-112

METEOROLOGY WATTS BAR Figure 2.3-8 Wind Speed at 9.72 Meters for Stability Class B, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993 WBNP-102 2.3-113

METEOROLOGY WATTS BAR Figure 2.3-9 Wind Speed at 9.72 Meters for Stability Class C, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993 WBNP-102 2.3-114

METEOROLOGY WATTS BAR 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-102 2.3-115

METEOROLOGY WATTS BAR 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-102 2.3-116

METEOROLOGY WATTS BAR 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-102 2.3-117

METEOROLOGY WATTS BAR Figure 2.3-13 Wind Speed at 9.72 Meters for Stability Class G, Watts Bar Nuclear Plant, January 1, 1974 - December 31, 1993 WBNP-102 2.3-118

METEOROLOGY WATTS BAR Figure 2.3-14 Topography Within 10 Mile Radius - N WBNP-102 2.3-119

METEOROLOGY WATTS BAR Figure 2.3-15 Topography Within 10 Mile Radius - NNE WBNP-102 2.3-120

METEOROLOGY WATTS BAR Figure 2.3-16 Topography Within 10 Mile Radius - NE WBNP-102 2.3-121

METEOROLOGY WATTS BAR Figure 2.3-17 Topography Within 10 Mile Radius - ENE WBNP-102 2.3-122

METEOROLOGY WATTS BAR Figure 2.3-18 Topography Within 10 Mile Radius - E WBNP-102 2.3-123

METEOROLOGY WATTS BAR Figure 2.3-19 Topography Within 10 Mile Radius - ESE WBNP-102 2.3-124

METEOROLOGY WATTS BAR Figure 2.3-20 Topography Within 10 Mile Radius - SE WBNP-102 2.3-125

METEOROLOGY WATTS BAR Figure 2.3-21 Topography Within 10 Mile Radius - SSE WBNP-102 2.3-126

METEOROLOGY WATTS BAR Figure 2.3-22 Topography Within 10 Mile Radius - S WBNP-102 2.3-127

METEOROLOGY WATTS BAR Figure 2.3-23 Topography Within 10 Mile Radius - SSW WBNP-102 2.3-128

METEOROLOGY WATTS BAR Figure 2.3-24 Topography Within 10 Mile Radius - SW WBNP-102 2.3-129

METEOROLOGY WATTS BAR Figure 2.3-25 Topography Within 10 Mile Radius - WSW WBNP-102 2.3-130

WATTS BAR WBNP-102 Figure 2.3-26 Topography Within 10 Mile Radius - W METEOROLOGY 2.3-131

WATTS BAR WBNP-102 Figure 2.3-27 Topography Within 10 Mile Radius - WNW METEOROLOGY 2.3-132

WATTS BAR WBNP-102 Figure 2.3-28 Topography Within 10 Mile Radius - NW METEOROLOGY 2.3-133

WATTS BAR WBNP-102 Figure 2.3-29 Topography Within 10 Mile Radius Watts Bar FSAR Section 2.0 Site Characteristics METEOROLOGY 2.3-134

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