ML20209J143
| ML20209J143 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 12/31/1998 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML20209J045 | List: |
| References | |
| NUDOCS 9907210134 | |
| Download: ML20209J143 (47) | |
Text
ENCLOSURE 2 l
RADIOLOGICAL IMPACT ASSESSMENT REPORT l
SEQUOYAH NUCLEAR PLANT l
JANUARY - DECEMBER 1998 i
l i
l 9907210134 990427 PDR ADOCK 05000327 R
PDR (q p
INTRODUCTION Potential doses to maximum individuals and the population around Sequoyah Nuclear Plant (SON) are calculated for each quarter as required in Section 5.2 of the Offsite Dose Calculation Manual (ODCM).
Measured plant releases for the reporting period are used to estimate these doses. Dispersion of radioactive effluents in the environment is estimated using meteorological data and riverflow data measured during the period. In this report, the doses resulting from releases are described and compared to limits established for SON.
DOSE LIMITS The ODCM specifies limits for the release of radioactive effluents, as well as limits for doses to the general public from the release of radioactive effluents. These limits are set well below the i
Technical Specification limits which govern the concentrations of radioactivity and doses permissible in unrestricted areas. This ensures that radioactive effluent releases are As Low As Reasonably Achievable.
The limits for doses 'in unrestricted areas from airborne noble gases releases are:
Less than or equal to 5 mrad per quarter and 10 mrad per year (per reactor unit) for gamma radiation,
- and -
Less than or equal to 10 mrad per quarter and 20 mrad per year (per reactor unit) for beta radiation.
The limit for the dose to a member of the general public in an unrestricted area from iodines and particulates released in airborne effluents is:
Less than or equal to 7.5 mrem per quarter and 15 mrem per year (per reactor unit) to any organ.
The limit for doses to a member of the general public from radioactive material in liquid effluents released to unrestricted areas is:
Less than or equal to 1.5 mrem per quarter and 3 mrem per year (per reactor unit) to the total body,
- and -
l Less tha' or equal to 5 mrem per quarter and I
10 mrem per year (per reactor unit) to any organ The EPA limits for total dose to the public in the vicinity of a nuclear power plant, established in the Environmental Dose Standard of 40 CFR 190 are:
l Less than or equal to 25 mrem per year to the total body, Less than or equal to 75 mrem per year to the thyroid,
- and -
Less than or equal to 25 mrem per year to any other organ.
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DOSE CALCULATIONS
)
i Estimated doses to the public are determined using computer models: Gaseous Effluent Licensing Code (GELC), and the Quarterly Water Dose Assessment Code (QWATA). These models are based on guidance provided by the NRC (in Regulatory Guides 1.109,1.111 and l
1.113) for determining the potential dose to individuals and populations living in the vicinity of l
the plant. The area around the plant is analyzed to determine the pathways through which the public may receive a dose. The doses calculated are a representation of the dose to a l
" maximum exposed individual." Some of the factors used in these calculations (such as ingestion rates) are maximum values. Many of these factors are obtained from l
NUREG/CR-1004. The values chosen will tend so overestimate the dose to this " maximum" person. The expected dose to actualindividuals is lower. The calculated doses are I
l presented in Tables 1 through 9.
DOSES FROM AIRBORNE EFFLUENTS For airborne effluents, the public can be exposed to radiation from several sources: direct radiation from the radioactivity in the air, direct radiation from radioactivity deposited on the ground, inhalation of airborne radioactivity, ingestion of vegetation which contains radioactivity-l deposited from the atmosphere, and ingestion of milk and beef which contains radioactivity deposited from the atmosphere onto vegetation and subsequently eaten by milk and beef animals.
Airborne Discharae Points Releases from SON are considered ground-level releases. The ground-level Joint Frequency i
Distribution (JFD) is derived from windspeeds and directions measured 10 meters above ground and from the vertical temperature difference between 10 and 46 meters, and are presented for each quarter in Attachment 1.0.
Mateoroloaical Data Meteorological variables at SON are measured continuously. Measurements collected include wind speed, wind direction, and temperature at heights of 10,46, and 91 meters above the ground. Quarterly joint frequency distributions (JFDs) are calculated for each release point using the appropriate levels of meteorological data. A JFD gives the percentage of the time in a quarter that the wind is blowing out of a particular upwind compass sector in a particular range of wind speeds for a given stability Class A through G. The wind speeds are divided into nine wind speed ranges. Calms are distributed by direction in proportion to the distribution of noncalm wind directions less than 0.7 m/s (1.5 mph). Stability classes are determined from the vertical temperature difference between two measurement levels.
External Exposure Dose Dose estimates for maximum external air dose (gamma-air and beta-air doses) are made for points at and beyond the unrestricted area boundary as described in the SON ODCM. The highest of these doses is then selected.
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Submersion Dose External doses to the skin and total body, due to submersion in a cloud of nnble gases, are estimated for the nearest residence in each sector. The residence with the highest dose is then selected from all sectors.
Oraan Dose Doses to organs due to releases of airborne effluents are estimated for the inhalation, ground contamination, and ingestion pathways. The ingestion pathway is further divided into four possible contributing pathways: ingestion of cow / goat milk, ingestion of beef, and ingestion of vegetables. Doses from applicable pathways are calculated for each real receptor location identified in the most recent land use survey. To determine the maximum organ dose, the doses from the pathways are summed for each receptor. For the ingestion dose, however, only those pathways that exist for each receptor are considered in the sum, i.e., milk ingestion doses are included only for locations where milk is consumed without commercial preparation and vegetable ingestion is included only for those locations where a garden is identified. To conservatively account for beef ingestion, a beef ingestion dose equal to that for the highest unrestricted area boundary location is added to each identified receptor. For ground contamination, the dose added to the organ dose being calculated is the total body dose calculated for that location, i.e., it is assumed that the dose to an individual organ is equal to the total body dose.
Doses from airborne effluents are presented in Tables 1 through 4.
DOSES FROM LIQUID EFFLUENTS For liquid effluents, the public can be exposed to radiation from three sources: the ingestion of water from the Tennessee River, the ingestion of fish caught in the Tennessee River, and direct exposure from radioactive material deposited on the river shoreline sediment (recreation).
The concentrations of radioactivity in the Tennessee River are estimated by a computer model which uses measured hydraulic data downstream of SON. Parameters used to determine the doses are based on guidance given by the NRC (in Regulatory Guides 1.109) for maximum ingestion rates, exposure times, etc. Wherever possible, parameters used in the dose calculation are site specific use factors determined by TVA. The models that are used to estimate doses, as well as the parameters input to the models, are described in detail in the SON ODCM.
Liauid Release Points and River Data Radioactivity concentrations in the Tennessee River are calculated assuming that releases in liquid effluents are continuous. Routine liquid releases from SON, located at Tennessee River Mile 484, are made through diffusers which extend into the Tennessee River. It is assumed that releases to the river through these diffusers will initially be entrained in one-fifth of the water which flows past the plant. The QWATA code makes the assumption that this mixing condition holds true until the water is completely mixed at the first downstream dam, at Tennessee River Mile 471.0.
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I Doses are calculated for locations within a 50 mile radius downstream of the plant site. The maximum potential recreation dose is calculated for a location immediately downstream from the plant outfall. The maximum individual dose from ingestion of fish is assumed to be that calculated for the consumption of fish caught anywhere between the plant and the first downstream dam (Chickamauga Dam). The maximum individual dose from drinking water is assumed to be that calculated at the nearest downstream public water supply (E. l. DuPont).
This could be interpreted as indicating that the maximum individual, as assumed for liquid releases from Sequoyah, is an individual who obtains all of his drinking water at E. l. DuPont, consumes fish caught from the Tennessee River between SON and Chickamauga Dam, and spends 500 hours0.00579 days <br />0.139 hours <br />8.267196e-4 weeks <br />1.9025e-4 months <br /> per year on the shoreline just below the outfall from Sequoyah. Dose estimates for the maximum individual due to liquid effluents for each quarter in the period are presented in Tables 5 through 8, along with the average river flows past the plant site for the periods.
Population doses are calculated assuming that each individual consumes milk, vegetables, and meat producod within the sector annulus in which he resides. Doses from external pathways and inhalation are based on the 50-mile human population distribution.
POPULATION DOSES Population doses for highest exposed organ due to airborne effluents are calculated for an estimated 1,060,000 persons living within a 50-mile radius of the plant site. Dosos from external pathways and inhalation are based on the 50-mile human population distribution.
Ingestion Population doses for total body and the maximum exposed organ due to liquid effluents are calculated for the entire downstream Tennessee River Pcpulation. Water ingestion population doses are calculated using actual population figures for downstream public water supplies. Fish ingestion population doses are calculated assuming that all sport fish caught 'in the Tennessee River are consumed by the Tennessee River population.
Recreation population doses are calculated using actual recreational data on the number of shoreline visits at downstream locations.
Population dose estimates for airborne and liquid effluents are presented in Tables 1 through 8.
DIRECT RADIATION Extemal gamma radiation levels were measured by thermoluminescent dosimeters (TLDs) deployed around SON as part of the offsite Evvironmental Radiological Monitoring Program.
i The quarterly gamma radiation levels determined from these TLDs during this reporting period averaged approximately 14.75 mR/ quarter at onsite (at or near the site boundary) stations and approximately 13.50 mR/ quarter at offsite stations, or approximately 1.25 mR/ quarter higher onsite than at offsite stations. This difference is consistent with levels measured for preoperation and construction phases of the TVA nuclear plant site where the average radiation levels onsite were generally 2-6 mR/ quarter higher than the levels offsite. This may be attributable to natural variations in environmental radiation levels, earth moving activities i
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onsite, the mass of concrete employed in the construction of the plants, or other undetermined influences. Fluctuations in natural background dose rates and in TLD readings tend to mask any small increments which may be due to plant operations. Thus, there was no identifiable increase in dose rate levels attributable to direct radiation from plant equipment and/or gasecus effluents.
DOSE TO A MEMBER OF THE PUBLIC INSIDE THE UNRESTRICTED AREA BOUNDARY As stated in the SON Offsite Dose Calculation Manual, an evaluation of the dose to a member of the public inside the unrestricted area boundary is performed for a hypothetical TVA employee who works just outside the restricted area fence for an entire work year (2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br />). Results from onsite TLD measurements for the calendar year in question indicate that the highest onsite TLD reading was 108 mrem. Using this value, and subtracting an annual background value of 58 mrem / year, and multiplying by the ratio of the occupancy times, the highest external dose to a member of the public inside the unrestricted area boundary is 11-mrem. The doses due to radioactive effluents released to the atmosphere calculated in this report would not add a significant amount to this measured dose. This dose is well below the 10 CFR 20 annual limit of 100 mrem.
TOTAL DOSE To determine compliance with 40 CFR 190, annual total dose contributions to the maximum individual from SON radioactive effluents and other nearby uranium fuel cycle sources are considered.
The annual dose to any organ other than thyroid for the maximum individual is conservatively estimated by summing the following doses: the total body air submersion dose for each quarter, the critical organ dose (for any organ other than the thyroid) from airborne effluents for each quarter from ground contamination, inhalation and ingestion, the total body dose from liquid effluents for each quarter, the maximum organ dose (for any organ other than the thyroid) from liquid effluents for each quarter, and any identifiable increase in direct radiation dose levels as measured by the environmental monitoring program. This dose is compared to tho 40 CFR 190 limit for total body or any organ dose (other than thyroid) to determine compliance.
The annual thyroid dose to the maximum individual is conservatively estimated by summing the following doses: the total body air submersion dose for each quarter, the thyroid dose from airborne effluents for each quarter, the total body dose from liquid effluents for each quarter, the thyroid dose from liquid effluents for each quarter, and any identifiable increase in direct radiation dose levels as measured by the environmental monitoring program. This dose is compared to the 40 CFR 190 limit for thyroid dose to determine compliance.
Cumulative annual total doses are presented in Table 9.
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Table 1 Doses from Airborne Effluents First Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector / Distance External Gamma Air 2.48E-02 mrad 5 mrad 0.496 SSW/1840 Beta Air 6.55E-02 mrad 10 mrad 0.655
~
Submersion Total Body 1.70E-02 mrad 10 mrad 0.170 SSW/2134 Skin 3.93E-02 mrad 10 mrad 0.393 Organ Doses Child /All Organs 1.77E-02 mrem 7.5 mrem 0.06 NNW/841 Child / Total Body 1.77E-02 mrem 7.5 mrem 0.06 Population Doses Total Body Dose 1.17E-01 man-rem Maximum Organ Dose (organ) 1.17E-01 man-rem (thyroid, liver, GIT, kidney, bone, lung)
Population doses can be compared to the natural background dose for the entire 50-mile population of about 95,400 man-rem / year (based on 90 mrem /yr for natural background).
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Table 2 Doses from Airborne Effluents Second Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector / Distance External Gamma Air 6.22E-02 mrad 5 mrad 0.272 NW/660 Beta Air 1.59E-01 mrad 10 mrad 1.590 Submersion Total Body 3.39E-02 mrad 10 mrad 0.339 NNW/841 Skin 7.81E-02 mrad 10 mrad 0.781 Organ Doses Child / Thyroid 4.59E-02 mrem 7.5 mrem 0.612 NNW/841 Child / Total Body 4.56E-02 mrem 7.5 mrem 0.612 Population Doses Total Body Dose 2.30E-01 man-rem Maximum Organ Dose (organ) 2.32E-01 man-rem (thyroid)
Population doses can be compared to the natural background dose for the entire 50-mile population of about 95,400 man-rem / year (based on 90 mrem /yr for natural background).
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Table 3 Doses from Airborne Effluents Third Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector / Distance External Gamma Air 1.21E-01 mrad 5 mrad 2.420 S/1570 Beta Air 2.92E-01 mrad 10 mrad 2.920 Submersion Total Body 7.95E-02 mrad 10 mrad 0.795 SSW/2134 Skin 1.81E-01 mrad 10 mrad 1.810 Organ Doses Child /All Organs 1.15E-01 mrem 7.5 mrem 1.533 S/2249 Child / Total Body 1.10E-01 mrem 7.5 mrem 1.467 Population Doses Total Body Dose 6.66E-01 man-rem Maximum Organ Dose (organ) 7.01E-01 man-rem (thyroid)
Population doses can be compared to the natural background dose for the entire 50-mile population of about 95,400 man-rem / year (based on 90 mrem /yr for natural background).
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Table 4 Doses from Airborne Effluents Fourth Quarter Individual Doses Quarterly Percent of Location Pathway Dose Limit Limit Sector / Distance External Gamma Air 1.42E-03 mrad 5 mrad 0.028 N/950 Beta Air 2.49E-03 mrad 10 mrad 0.025 Submersion Total Body 1.08E-03 mrad 10 mrad 0.011 SSW/2134 Skin 2.15E-03 mrad 10 mrad 0.022 Organ Doses Child / Thyroid 1.01E-02 mrem 7.5 mrem 0.135 SSW/2707 Child / Total Body 9.35E-03 mrem 7.5 mrem 0.125 j
Population Doses Total Body Dose 6.81E-02 man-rem Maximum Organ Dose (organ) 7.25E-02 man-rem (thyroid)
Population doses can be compared to the natural background dose for the entire 50-mile population of about 95,400 man-rem / year (based on 90 mrem /yr for natural background).
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}
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Table 5 Doses from Liquid Effluents j
First Quarter Individual Doses (mrem)
Quarterly Percent Age Group Organ Dose Limit of Limit
)
Adult Total 1.5E-03 1.5 mrem
<1%
Body Child Liver 1.9E-03 5 mrem
<1%
Child Thyroid 1.3E-03 5 mrem
<1%
l Average Riverflow past SON (cubic feet per second): 50,670 Population Doses Total Body Dose 7.3E-02 man-rem Maximum Organ Dose (organ) 8.1E-01 man-rem (Thyroid)
Population doses can be compared to the natural background dose for the entire 50-mile population of about 95,400 man-rem / year (based on 90 mrem /yr for natural background).
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Table 6 Doses from Liquid Effluents Second Quarter Individual Doses (mrem)
Quarterly Percent Age Group Organ Dose Limit of Limit Adult Total Body 2.1 E-03 1.5 mrem
<1%
Child Liver 2.6E-03 5 mrem
<1%
Child Thyroid 2.1 E-03 5 mrem
<1%
Average Riverflow past SON (cubic feet per second): 52,657 Population Doses Total Body Dose 1.2E-01 man-rem Maximum Organ Dose (organ) 1.4E-01 man-rem (Thyroid) l Population doses can be compared to the natural background dose for the entire 50-mile population of about 95,400 man-rem / year (based on 90 mrem /yr for natural background).
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l Table 7 Doses from Liquid Effluents Third Quarter Individual Doses (mrem)
Quarterly Percent Age Group Organ Dose Limit of Limit Adult Total Body 1.3E-02 1.5 mrem
<1%
Adult Liver 1.7E-02 5 mrem
<1%
Child Thyroid 5.4E-03 5 mrem
<1%
Average Riverflow past SON (cubic feet per second): 27,517 Population Doses Total Body Dose 4.4E-01 man-rem Maximum Organ Dose (organ) 4.6E-01 man-rem (Liver)
Dopulation doses can be compared to the natural background dose for the entire 50-mile population of about 95,400 man-rem / year (based on 90 mrem /yr for natural background).
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Ta ble 8 Doces from Liquid Effluents Fourth Quarter Individual Doses (mrem)
Quarterly Percent
' Age Group Organ Dose Limit of Limit Adult Total Body 4.2E-03 1.5 mrem
<1%
Adult GlT 5.2E-03 5 mrem
<1%
l Child Thyroid 2.4E-03 5 mrem
<1%
)
Average River flow past SON (cubic feet per second): 24,148 Population Doses Total Body Dose 1.9E-01 man-rem Maximum Organ Dose (organ) 2.0E-01 man-rem (GIT, Liver)
Population doses can be compared to the natural background dose for the entire 50-mile population of about 95,400 man-rem / year (based on 90 mrem /yr for natural background).
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E Table 9 Total Dose from Fuel Cycle First Second Third Fourth Dose Quader Quader Quader Quader Total Body or any Organ (except thyroid)
Total body air submersion 1.70E-02 3.39E-02 7.95E-02 1.08E-03 Critical organ dose (air) 1.77E-02 4.59E-02 1.15E-01 1.01 E-02 Total body dose (liquid) 1.5E-03 2.1 E-03 1.3E-02 4.2E-03 Maximum organ dose 1.9E-03 2.6E-03 1.7E-02 5.2E-03 (liquid)
Direct Radiation Dose 0.0E-00 0.0E-00 0.0E-00 0.0E-00 Total 3.81E-02 8.45E-02 2.25E-01 2.06E-02 Cumulative Total Dose (Total body or any other organ) mrem 3.68E-01 AnnualDose Limit (mrem) 2.50E+01 Percent of Limit 1.5 %
Thyroid Dose (mrem) l Total body air submersion 1.70E-02 3.39E-02 7.95E-02 1.08E-03 Thyroid dose (airborne) 1.77E-02 4.59E-02 1.15E-01 1.01 E-02 Total body dose (liauid) 1.5E-03 2.1 E-03 1.3E-02 4.2-03 Thyroid dose (liquid) 1.3E-03 2.1 E-03 5.4E-03 2.4 E-03 Direct Radiation Dose 0.0E-00 0.0E-00 0.0E-00 0.0E-00 Total 3.75E;02 8.40E-02 2.13E-01 1.78E-02 Cumulative Total Dose (Thyroid) mrem 3.52E-01 Annual Dose L!mit (mrem) 7.50E+01 Percent of Limit
<1%
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l 15 l
JOINT PERCENTAGE FR20UENCIES OF W'ND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M) a Sequoyah Nuclear Plant JAN 1, 98 - MAR 31, 98 WIND WIND SPEED (MPH)
DIRECTION CALM 0.6-1.4 1.5-3.4 3.5 5.4 5.5-7.4 7.5-12.4 12.5+18.4 18.5-24.4
>=24.5 TOTAL N
0.000 0.000 0.000 0.000 0.094 0.047 0.000 0.000 0.000 0.142 NNE 0.000 0.000 0.000 0.047 0.189 0.236 0.000 0.000 0.000 0.4 72 NE 0.000 0.000 0.000 0.000 0.236 0.189 0.000 0.000 0.000 0.425 ENE 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 E
0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 ESE 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 SE 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 SSE 0.000 0.000 0.000 0.000
,0,000 0.094 0.047 0.000 0.000 0.142 S
0.000 0.000 0.000 0.000 0.047 0.331 0.000 0.000 0.000 0.378 SSW 0.000 0.000 0.000 0.094 0.661 0.992 0.000 0.000 0.000 1.748 S3 0.000 0.000 0.000 0.142 0.661 0.189 0.000 0.000 0.000 0.992 WSW 0.000 0.000 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.094 0
0.000 0.000 0.000 0.000 0.094 0.047 0.000 0.000 0.000 0.142 WNW 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.047 NW 0.000 0.000 0.000 0.000 0.094 0.000 0.000 0.000 0.000 0.094 NNW 0.000 0.000 0.000 0.000 0.047 0.142 0.000 0.000 0.000 0.189 SUBTOTAL 0.000 0.000 0.047 0.378 2.220 2.362 0.047 0.000 0.000 5.054 I
TOTAL HOURS OF VALID STABILITY DBSERVATIONS 2121 TOTAL HOURS OF STABILITY CLASS A 107 l
TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 107 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2117 l
TOTAL HOURS CALM 0
l METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 04 May-98 l
NEAN WIND SPEED = 7.44 l
l l
NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS
JOINT PERCENTAGE FREDUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS B
( 1.9< DELTA Tc=-1.7 C/100 M)
Sequoyah Nuclear Plant JAN 1, 98 - MAR 31, 98 WIND WIND SPEED (MPH)
DIREC710N 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 0.047 0.047 0.142 0.189 0.000 0.000 0.000 0.425 NNE 0.000 0.000 0.000 0.094 0.425 0.094 0.000 0.000 0.000 0.614 CE 0.000 0.000-0.000 0.236 0.000 0.047 0.000 0.000 0.000 0.283 ENE 0.000 0.000 0.047 0.04 7 0.000 0.000 0.000 0.000 0.000 0.094 E
0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE
' O.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.094 0.000 0.000 0.000 0.000 0.000 0.094 SSE 0.000 0.000 0.047 0.047 0.000 0.094 0.000 0.000 0.000 0.189 0.000 0.000 0.047 0.000 0.094 0.047 0.000 0.000 0.000 0.189 SSS 0.000 0.000 0.047 0.094 0.142 0.283 0.000 0.000 0.000 0.567
. SW '
O.000 0.000 0.000-0.094 0.189 0.283 0.000 0.000 0.000 0.567 USB 0.00u 0.000 0.000 0.000 0.094 0.000 0.000 0.000 0.000 0.094 0
0.000 0.000 0.000 0.000 0.094 0.047 0.000 0.000 0.000 0.142 WNW 0.000 0.000 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.094 N3 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.047
. NN3 0.000 0.000 0.000 0.000 0.094 0.047 0.000 0.000 0.000 0.142 SUBf0TAL 0.000 0.000-
-0.236 0.756 1.323 1.228 0.000 0.000 0.000 3.543 TOTAL HOURS OF VALID STABILITY OBSERVATION $
2121 70TAL HOURS OF STABILITY CLASS B 75 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY CLASS B 75 TOTAL H3URS OF VALID WIND DIRECTION-WIND SPEED STABILITY OBSERVATIONS 2117 707AL HOURS CALM 0
METEOROLOGICAL FACILITY:
Sequoyah Nuclear Plant STABILITY BASED ON DELTA T BETWEEN 9.25 AND 45.99 METERS
.UIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 04 May-98 MEAN Wit' SPEED = 6.66 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS
JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR l
( 1.7< DELTA T o-1.5 C/100 M) l STABILITY CLASS C Sequoyah Nuclear Plant j
JAN 1, 98 - MAR 31, 98 l
dlND '
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 1
W 0.000 0.000 0.000 0.000 0.047 0.047 0.000' O.000 0.000 0.094 NNE 0.000 0.000 0.142 0.425 0.047 0.094
-0.000
.0.000 0.000 0.709 NE 0.000 0.000 0.142 0.142 0.236 0.000 0.000 0.000 0.000 0.520 ENE 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 E
0.000 0.000 0.047 0.000
- 0.000 0.000 0.000 0.000 0.000 0.047
'ESE 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.094 SE 0.000 0.000 0.094 0.047 0.000 0.000 0.000 0.000 0.000 0.142 SSE 0.000 0.000 0.047 0.000 0.000 0.047 0.000 0.000 0.000 0.094 S
0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.047
$$W '
O.000 0.000 0.000 0.283 0.189 0.189 0.000 0.000 0.000 0.661 SW 20.000 0.000
.0.000 0.142 0.142 0.000 0.000 0.000 0.000 0.283 WSW 0.000 0.000.
0.000 0.047 0.000 0.047 0.000 0.000 0.000 0.094 W
0.000 0.000 0.047
.0.047 0.142 0.000 0.000 0.000 0.000 0.236 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.094 0.000 0.047 0.000 0.000 0.000 0.142 SU6 TOTAL 0.000 0.000 0.614 1.275 0'803 0.520 0.000 0.000 0.000 3.212 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2121 TOTAL HOURS OF STABILITY CLASS C 69 TOTAL HOURS OF VALID WIND DIRECTION WIND SPEED-STABILITY CLASS C 68 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2117 VOTAL HOURS CALM 0
METEOROLOGICAL FACILITY:
Sequoyah Nuclear Plant SVABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT.9.73 METER LEVEL DATE PRINTED: 04-May 98 MEAN WIND SPEED = 5.46 NOTE: TOTALS AND SUBiOTALS ARE OBTAINED FROM UNROUNDED NUMBERS
JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D
(-1.5< DELTA Tc=-0.5 C/100 M)
Sequoyah Nuclear Plant JAN 1, 98 MAR 31, 98 WIND WIND SPEED (MPH);
DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5 24.4
>=24.5 TOTAL N
0.006 0.142 1.606 1.937 1.2 75 -
0.709 0.000 0.000 0.000 5.6 75 CNE 0.011 0.142 2.881 3.401 2.740 1.606 0.897 0.047 0.000 11.726 NE 0.004 0.094
'O.945 0.331 0.283 0.189 0.000 0.000 0.000 1.846 ENE 0.001 0.047 0.189 0.283 0.047 0.000 0.000 0.000 0.000 0.568 E-0.001 0.000 0.142 0.142 0.000 0.000 0.000 0.000 0.000 0.284 ESE 0.001 0.000 0.236 0.047 0.000 0.000 0.000 0.000 0.000 0.284 SE 0.001 0.047 0.142 0.000 0.000 0.000 0.000 0.000 0.000 0.190 SSE 0.002 0.236 0.236 0.047 0.047 0.047 0.047 0.000 0.000 0.663 S
0.003 0.094 0.661 0.331 0.236 0.378 0.142 0.000 0.000 1.845
$$w 0.004 0.000 1.134 1.039 0.614 0.520 0.000 0.000 0.000 3.311 S3' O.004 0.142 0.945 1.559 1.323 0.142 0.000 0.000 0.000 4.114 WSW 0.002 0.142 0.378 0.378 0.614 0.378 0.000 0.000 0.000 1.891 W
0.001 0.189
~ 0.189 0.520 0.378 0.000 0.000 0.000 0.000 1.2 77 WNW 0.001 0.142 0.189 0.897 0.236 0.094 0,000 0.000 0.000 1.560 W9 0.002 0.047 0.614 1.039.
0.709 0.047 0.000 0.000 0.000 2.459 NNW 0.004 0.142 0.897 1.512 0.661 0.331 0.000 0.000 0.000 3.547 SUBVOTAL 0.047 1.606 11.384 13.462 9.164 4.440 1.086 0.047 0.000 41.238 VOTAL HOURS OF VALID STABILITY OBSERVATIONS 2121
. TOTAL HOURS OF STABILITY CLASS D 876 70TAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY CLASS D 873 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY DBSERVATIONS 2117 TOTAL HOURS CALM 1
METEOROLOGICAL FACILITY:
Sequoyah Nuclear Plant STABILITY BASED DN DELTA T BETWEEN 9.25 AND 45.99 METERS dlND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 04 May 98 MEAN WIND SPEED = 4.96 i
NOTE: TOTALS AND SUBTOTALS ARE DBTAINED FROM UNROUNDED NUMBERS l
J0!NT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E
(-0.5< DELTA T<= 1.5 C/100 M)
Sequoyah Nuclear Plant JAN 1, 98 MAR 31, 98 UIND WIND SPEED (MPH)
DIRECil0N 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 0.472 3.307 0.897 0.472 0.000 0.000 0.000 0.000 5.149 NNE 0.000 0.614 3.165 1.559 0.472 0.094' O.047 0.000 0.000 5.952 NE 0.000 0.756 0.472 0.094 0.142 0.000 0.000 0.000 0.000 1.464 ENE 0.000 0.047 0.142 0.000 0.000 0.000 0.000 0.000 0.000 0.189 E
'O.000 0.047 0.094 0.000 0.047 0.000 0.000 0.000 0.000 0.189 ESE 0.000 -
0.094 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.142 SE 0.000 0.283 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.331 SSE 0.000 0.283 0.189 0.189 0.047 0.567 0.000 0.000 0.000 1.2 75 5
0.000 0.378
- 0. 75 6 '
O.756 0.709 1.039 0.000 0.000 0.000 3.637 S$W 0.000 0.378 1.984 1.417 0.897 0.3 78 0.000 0.000 0.000 5.054 SW -
0.000 0.283 2.220 0.709 0.661 0.614 0.000 0.000 0.000 4.487 WSW 0.000 0.142 0.283 0.047 0.283 0.000 0.000 0.000 0.000 0.756 W
0.000 0.047 0.425 0.142 0.142 0.047 0.000 0.000 0.000 0.803 WWW 0.000 0.094 0.189 0.142 0.000 0.000 0.000 0.000 0.000 0.425 NW 0.000 0.236 0.3 78 0.142 0.000 0.000 0.000 0.000 0.000 0.756 NNW 0.000 -
0.378 0.945 0.331 0.094 0.000 0.000 0.000 0.000 1.748 SUBTOTAL 0.000 4.535 14.596'
~6.424 4.015 2.740 0.047 0.000 0.000 32.357 TOTAL HOURS OF VALID STABILITY DBSERVATIONS 2121
, TOTAL HOURS OF STABILITY CLASS E 685 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLt.SS E 685 TOTAL HOURS OF VALID WIND DIRECT!DN-WIND SPEED STABILITY DBSERVATIONS 2117 70TAL HOURS CALM 0
l METEOROLOGICAL FACILITY:
Sequoyah Nuclear Plant l
STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 04 May-98 MEAN WIND SPEED = 3.64 IOOTE: TOTALS AND SUBTOTALR ARE OBTAINED FROM UNROUNDED NUMBERS i
1 l-
I JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR l
STABILITY CLASS F
( 1.5< DCLTA T<= 4.0 C/100 M)
Sequoyah Nuclear Plant JAN 1, 98 MAR 31, 98 WIND WIND SPEED (MPH)
DIRECTICN 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 0.094 0.803 0.047 0.000 0.000 0.000 0.000 0.000 0.945 NNE 0.000 0.378 2.787 0.094 0.000 0.000 0.000 0.000 0.000 3.259 CE 0.000 0.331 0.850 0.000 0.000 0.000 0.000 0.000 0.000 1.181 ENE 0.000 0.094 0.142 0.000 0.000 0.000 0.000 0.000 0.000 0.236 E
0.000 0.094 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.189 ESE 0.000 0.094 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.142 GE 0.000 0.142 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.189 SSE 0.000 0.236 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.331 S
0.000 0.283 0.331 0.047 0.000 0.000 0.000 0.000 0.000 0.661 SSW 0.000 0.047 1.181 0.142 0.000 0.000 0.000 0.000 0.000 1.370 SW 0.000 0.047 0.567 0.000 0.000 0.000 0.000 0.000 0.000 0.614 WSW 0.000 0.047 0.142 0.000 0.000 0.000 0.000 0.000 0.000 0.189 0
0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 WNW 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 N3 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 CNW 0.000 0.000 0.142 0.000 0.000 0.000 0.000 0.000 0.000 0.142 SUBTOTAL 0.000 1.889 7.322 0.378 0.000 0.000 0.000 0.000 0.000 9.589 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2121 TOTAL HOURS OF STABILITY CLASS F 203 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS F 203 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY OBSERVATIONS 2117 TOTAL HOURS CALM 0
METEOROLOGICAL FACILITY: Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 04-May-98 MEAN WIND SPEED = 2.10 NOTE: TOTALS AND SUBTOTALS ARE OBTAlWED FROM UNROUNDED NUMBERS
JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)
Sequoyah Nuclear Plant JAN 1, 98 - MAR 31, 98 UII)
WIND SPEED (MPH)
DIRECTION CALM 0.6-1.4 1.5 3.4 3.5-5.4 5.5-7.4 7.5 12.4 12.5-18.4 18.5-24.4
>=24.5 TOTAL N
0.003 0.094 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.144 NME 0.028 0.236 1.181 0.000 0.000 0.000 0.000 0.000 0.000 1.445 NE D.022 0.236 0.897 0.000 0.000 C,000 0.000 0.000 0.000 1.156 ENE 0.006 0.189 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.289 E
0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.001 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048 SE 0.005 0.142 0.094 0.000 0.000 0.000' O.000 0.000 0.000 0.241 SSE 0.005 0.189 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.241 S
0.009 0.189 0.283 0.000 0.000 0.000 0.000 0.000 0.000 0.482 SSW 0.009 0.142 0.331 0.047 0.000 0.000 0.000 0.000 0.000 0.529 SW 0.007 0.047 0.331 0.000 0.000 0.000 0.000 0.000 0.000 0.385 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0
0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 N3 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0 001 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.048 SC3 TOTAL 0.094 1.512 3.354 0.047 0.000 0.000 0.000 0.000 0.000 5.007 70TAL HOURS OF VALID STABILITY OBSERVATIONS 2121 TOTAL HOURS OF STABILITY CLhSS G 106 TOTAL HOURS OF VALID WIND DIRECTION WIND SPEED STABILITY CLASS G 106 70TAL HOURS OF VALID WIND DIRECTION WIND SPEED-STABILITY OBSERVATIONS 2'17 VOTAL HOURS CALM 2
METEOROLOGICAL FACILITY:
Sequoyah Nuclear Plant i
STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS
]
WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 04-May 98 j
MEAN WIND SPEED = 1.90 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS
Table 11 Joint Frequency Distribution in Percent for Ground Level Releases Second Quarter i
\\
l 16
i
.-t JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA T<=-1.9 C/100 M)
Sequoyah Nuclear Plant APR 1, 1998 - JUN 30, 1998 WIND WIND SPEED (MPH)
DIRECTION CALM 0.6-1.4 1.5 3.4 3.5 5.4 5.57.4 7.5 12.4 12.5 18.4 18.5-24.4-
>=24.5 TOTAL N
0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.047 NNE 0.000.
0.000 0.000 0.093 0.279 0.140 0.000 0.000 0.000 0.512 NE 0.000 0.000 0.000 0.279 0.372 0.140 0.000 0.000 0.000 0.791 ENE 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 E
0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.000 0.093 SSE 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.093 0.140 0.093 0.000 0.000 0.000 0.326 SSW 0.000 0.000 0.047 0.512 0.698 0.698 0.000 0.000 0.000 1.955
. S')
0.000' O.047 0.047 0.419 0.326 0.186 0.000 0.000 0.000 1.024 WSW 0.000 0.000 0.047 0.093 0.140 0.047 0.000 0.000 0.000 0.326 U
0.000 0.000 0.000 0.000 0.093 0.047 0.000 0.000 0.000 0.140 WWW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 NNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SUBTOTAL 0.000 0.047 0.140 1.676 2.095 1.397
-0.000 0.000 0.000 5.354 1
1 l
i TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2173
. TOTAL HOURS OF STABILITY CLASS A 117 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY CLASS A 115 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSEDVATIONS 2148 TOTAL HOURS CALM, O
METEOROLOGICAL FACILITY:
Sequoyan Nuclear Plant STASILITY BASED ON DELTA T BETWEEN 9.25 AND 45.99 METERS j
< WIND t PEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 19980810 MEAN WIND SPEED s 6.15 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS
JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR
/
STABILITY CLASS B
(-1.9< DELTA Tc=-1.7 C/100 M)
Sequoyah Nuclear P'Lnt APR 1, 1998 - JUN 30, 1998 WIND WIND SPEED (MPH)
DIRECTION CALM 0.6 1.4 1.5 3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5 18.4 18.5 24.4
>=24.5 TOTAL N
0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNE 0.000 0.000 0.047 0.419 0.093 0.186 0.000 0.000 0.000 0.745 NE 0.000 0.000 0.140 0.326 0.047 0.000 0.000 0.000 0.000 0.512 ENE 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.093 E
0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.093 ESE 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.047 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.093 S
0.000 0.000 0.140 0.140 0.047 0.047 0.000 0.000 0.000 0.372 SSW 0.000 0.000 0.093 1.071 0.166 0.000 0.000 0.000 0.000 1.350 SW 0.000 0.000 0.093 0.326 0.233 0.047 0.000 0.000 0.000 0.698 WSW 0.000 0.000 0.000 0.093 0.000 0.093 0.000 0.000 0.000 0.156 W
0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 WNW 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.047 NW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.047 SUBTOTAL 0.000 0.000 0.791 2.467 0.698 0.372 0.000 0.000 0.000 4.330 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2173 TOTAL HOURS OF STABILITY CLASS B 95 TOTAL HOURS OF VALID WIND DIRECTION WIND SPEED STABILITY CLASS B 93 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2148 VOTAL HOURS CALM 0
METEOROLOGICAL FACILITY:
Sequoyah Nuclear Plant STABILITY BASED ON DELTA T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 19980810 MEAN WIND SPEED = 4.86 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS
I JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS C
(-1.74 DELTA T<=-1.5 C/100 M)
Sequoyah Nuclear Plant APR 1, 1998 - JUN 30, 1998 WIND WIND SPEED (MPM)
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 0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.093 NNE 0.000 0.000 0.186 0.279 0.326 0.D93 0.000 0.000 0.000 0.885 NE 0.000 0.000 0.140 0.140 0.047 0.047 0.000 0.000 0.000 0.3 72 ENE 0.000 0.000 0.279 0.000 0.000 0.000 0.000 0.000 0.000 0.279 E
0.000 0.000 0.047 0.047 0.000 0.000 0.000 0.000 0.000 0.093 ESE 0.000 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.04 7 SE 0.000 0.000 0.372 0.047 0.000 0.000 0.000 0.000 0.000 0.419 SSE 0.000 0.000 0.233 0.093 0.000 0.000 0.000 0.000 0.000 0.326 S
0.000 0.000 0.326 0.047 0.047 0.000 0.000 0.000 0.000 0.419 SSW 0.000 0.000 0.326 0.885 0.233 0.000 0.000 0.000 0.000 1.443 SW 0.000.
0.000 0.419 0.605 0.279 0.140 0.000 0.000 0.000 1.443 WSW 0.000.
0.000 0.000 0.000 0.047 0.093 0.000 0.000 0.000 0.140 W
0.000 0.000 0.000 0.047 0.047 0.D93 0.000 0.000 0.000 0.186 WNW 0.000 0.000 0.000 0.000 0.093 0.000 0.000 0.000 0.000 0.093 NW 0.000 0.000 0.000 0.04 7 0.047 0.033 0.000 0.000 0.000 0.186 NNW
'0.000 0.000 0.000 0.000 0.000 0.047 0.000 0.000 0.000 0.047 SUBT07AL 0.000 0.000 2.3T4 2.235 1.210 0.652 0.000 0.000 0.000 6.471 TOTAL HOURS OF VALID STABILITY DBSERVATIONS 2173 TOTAL NOUR$ OF STABILITY CLASS C 139 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY CLASS C 139 j
TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2148 T07AL HOURS CALM 0
METEOROLOGICAL FACILITY:
Sequoyah Nuclear Plant
$7 ABILITY BASED ON DELTA T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 19980810 MEAN WIND SPEED = '4.54 NOTES-TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS
i.
l JOINT PERCENTAGE FREQUENCIES OF WIND $0EED BY WIND DIRECTION FOR STABILITY CLASS D
( 1.5< DELTA Tc=-0.5 C/100 M) 1 Sequoyah Nuclear Plant APR 1, 1998 - JUN 30, 1998 WIND WIND SPEED (MPH) l 0!RECTION CALM 0.6-1.4 1.5 3.4 3.5 5.4 5.5-7.4 7.5 12.4 12.5 18.4 18.5-24.4
>=24.5
' TOTAL N
0.000 0.000 0.466 0.931 0.931 0.233 0.000 L J.Q 0.000 2.561 NME 0.000 0.000 1.071 1.769 1.024 0.093 0.000 0.000 0.000 3.957 NE 0.000 0.000 1.210 0.326 0.186 0.093 0.000 0.000 0.000 1.816 ENE 0.000 0.000 0.419 0.093 0.000 0.000 0.000 0.000 0.000 0.512 I
E 0.000 0.047 0.326 0.047 0.000 0.000 0.000 0.000 0.000 0.419 i
ESE 0.000 0.047 0.326 0.00L 0.000 0.000 0.000 0.000 0.000 0.372 SE 0.000 0.000 0.559 0.000 0.000 0.000 0.000 0.000 0.000 0.559 SSE 0.000 0.000 0.466 0.140 0.000 0.000 0.000 0.000 0.000 0.605 S
0.000 0.047 1.350 0.559 0.186 0.140 0.047 0.000 0.000 2.328
'SSW 0.000 0.233 2.188 2.142 0.605 0.419 0.000 0.000 0.000 5.587 SW 0.000 0.140 1.397 1.350 0.512 0.279 0.000 0.000 0.000 3.678 WSW 0.000 0.047 0.419 0.326 0.419 0.326 0.000 0.000 0.000 1.536 0
0.000 0.047 0.047 0.466 0.512 0.093 0.000 0.000 0.000 1.164 WWW 0.000 0.000 0.186 0.140 0.186 0.140 0.000 0.000 0.000 0.652 NW 0.000.
0.000 0.186 0.186 0.698 0.233 0.000 0.000 0.000 1.304 NNW 0.000 0.093 0.140 0.326 0.326 0.093 0.000 0.000 0.000 0.978
$UBT0TAL 0.000 0.698 10.754 8.799 5.587 2.142 0.047 0.000 0.000 28.026 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2173 TOTAL HOURS OF STABILITY CLASS D 610 TOTAL NOURS OF VAllD WIND DIRECTION-WIND SPEED STABILITY CLASS D 602 TOTAL HOURS OF VALIO WINO DIRECTION-WIND SPEED STABILITY OBSERVATIONS 2148 TOTAL HOURS CALM 0
METEOROLOGICAL FACILITY:
Sequoyah Nuclear Plant l
STABILITY BASED ON DELTA T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 19980810 MEAN WIND SPEED = 4.33 NOTE:. TOTALS AND SUGTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS l
l l
i
{
i
I JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E
(-0.5< DELTA T<= 1.5 C/100 M)
Sequoyah Nuclear Plant I
APR 1, 1998 - JUN 30, 1998 I
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 l
C 0.018 0.372 2.048 1.024 0.279 0.000 0.000 0.000 0.000 3.743 NNE 0.017 -
0.326 1.909 0.698 0.093 0.047 0.000 0.000 0.000 3.090 NE 0.010 0.559 0.698 0.140 0.000 0.000 0.000 0.000 0.000 1.406 ENE 0.001 0.186 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.188 E
0.004 0.186 0.279 0.000 0.000 0.000 0.000 0.000 0.000 0.469 ESE 0.002 0.140 0.140 0.047 0.000 0.000 0.000 0.000 0.000
'O.328 I
SE 0.003 0.233 0.186 0.000 0.000 0.000 0.000 0.000 0.000 0.422 SSE 0.005 0.326 0.279 0.093 0.047 0.000 0.000 0.000 0.000 0.749 5
0.018 0.605 1.723 0.885 0.186 0.326 0.000 0.000 0.000 3.742 SW 0.030 0.279 4.749 1.629 0.372 0.140 0.000 0.000 0.000 7.207
. SW 0.030 0.233 3.771 2.002 0.326 0.093 0.000 0.000 0.000 6.455 WSW 0.012 0.279 1.350 0.652 0.512 0.000 0.000 0.000 0.000 2.806 W
0.009 0.419 0.791 0.326 0.140 0.000 0.000 0.000 0.000 1.685 WNW 0.004 0.233 0.279-0.093 0.000 0.093 0.000 0.000 0.000 0.702 NW 0.005 0.279 0.419 0.466 0.047 0.000 0.000 0.000 0.000 1.216 NNW 0.010 0.326 1.024 0.279 0.093 0.000 0.000 0.000 0.000 1.733 SusTOTAL 0.186 4.981 19.646 8.333 2.095 0.698 0.000 0.000 0.000 35.940 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2173 TOTAL HOURS OF STABILITY CLASS E 778 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY CLASS E 772 TOTAL HOURS OF VALID WIND DIRECTION WIND SPEED STABILITY OBSERVATIONS 2148 TOTAL HOURS CALM 4
METEOROLOGICAL FACILITY:
Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 19980810 MEAN WIND SPEED = 2.99 NOTE: TOTALS AND SU8 TOTALS ARE OBTAINED FROM UNR0 LADED NUMBERS
JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS F
( 1.5< DELTA T<= 4.0 C/100 M)
Sequoyah Nuclear Plant APR 1, 1998
- JUN 30, 1998 l
WINO WIND SPEED (MPH)
DIRECTION CALM 0.6 1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5 12.4 12.5-18.4 18.5 24.4
>=24.5 TOTAL N-0.027 0.466 1.117 0.000 0.000 0.000 0.000 0.000 0.000 1.610 NNE 0.041 0.791 1.629 0.000 0.000 0.000 0.000 0.000 0.000 2.462 NE -
0.026 0.652 0.885 0.000 0.000 0.000 0.000 0.00C 0.000 1.562 ENE.
0.004 0.233 0.000 0.000 0.000 0.000 0.000-0.000 0.000 0.237 E
0.003 0.186 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.189 j
ESE~
0.004 0.233 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.237 SE.
0.012 0.605 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.710 SSE-0.013 0.698-0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.757 5
0.016 0.326 0.605 0.093 0.000 0.000 0.000 0.000 0.000 1.040 SSW 0.035 0.372 1.676 0.000 0.000 0.000 0.000 0.000 0.000 2.083 SW 0.028 0.186-1.490 0.3 72 0.000 0.000 0.000 0.000 0.000 2.077 WSW 0.006 0.047 0.279 0.093 0.047 0.000 0.000 0.000 0.000 0.471 t$
0.003 0.093 0.093 0.093 0.093 0.000 0.000
'0.000 0.000 0.376 WNW 0.002 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.095 N3 0.006 0.140 0.233 0.047 0.000 0.000 0.000 0.000 0.000 0.425 NNW 0.009 0.140 0.372 0.093 0.000 0.000 0.000 0.000 0.000 0.614 SUB70TAL 0.233 5.261 8.520 0.791 0.140 0.000 0.000 0.000 0.000 14.944 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2173-TOTAL HOURS OF. STABILITY CLASS F 324 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY CLASS F 321 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY OBSERVATIONS 2148 TOTAL HOURS CALM 5
METEOROLOGICAL FACILITY:
Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 19980810 MEAN WIND SPEED = 1.90 NOTE: TOTALS AND SUST0TALS ARE OBTAINED FROM UNROUNDED NUi4BERS
l JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR j
STABILITY CLASS G (DELTA T > 4.0 C/100 M)
Sequoyah Nuclear Plant APR 1,1998 - JUN 30,1998 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.$
TOTAL N
0.002 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.048 NNE 0.028 0.233 0.466 0.000 0.000 0.000 0.000 0.000 0.000 0.726 NE 0.037 0.326 0.605 0.000 0.000 0.000 0.000 0.000 0.000 0.968 ENE-0.009 0.233 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.242 E
0.004 0.093 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.097 ESE 0.006 0.093 0.04 7 0.000 0.000 0.000 0.000 0.000 0.000 0.145 SE -
0.011 0.279 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.291 SSE 0.006 0.093 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.145 5
0.002 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048 SSW.
0.043 0.466 0.605 0.000 0.000 0.000 0.000 0.000 0.000 1.114 SW 0.030 -
0.04 7 0.698 0.093 0.000 0.000.
0.000 0.000 0.000 0.868 WSW 0.002 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.048 W
0.002 0.000-0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.048 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.004 0.047-0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.097 NNW 0.002 0.000 0.047 0.000 0.000 0.000 0.000 0.000 0.000 0.048 l
l SUBTOTAL 0.186 2.002 2.654 0.093 0.000 0.000 0.000 0.000 0.000 4.9?S l
TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2173 l
TOTAL NOURS OF STABILITY CLASS G 110 j
j_
TOTAL HOURS OF VALID WIND DIRECTION WIND SPEED STABIL1TV CLASS G 106 l
TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY OBSERVATIONS 2148 T07AL HOURS CALM 4
l METEOROLOGICAL FACILITY:
Sequoyah Nuclear Plant STABILITY BASED ON DELTA T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL l
DATE PRINTED: 19980810 MEAN WIND SPEED = -1.62' 1
8 WOTEi TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS
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Table 13 Joint Frequency Distribution in Percent for Ground Level Releases Fourth Quarter l
18
~
.s
)
JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS A (DELTA Tc=-1.9 C/100 M)
Sequoyah Nuclear Plant DCT 1, 1998 - DEC 31, 1998 WIND WIND SPEED (MPH)
DIRECTION CALM 0.6 1.4 1.5 3.4 3.5-5.4 5.5 7.4 7.5-12.4 12.5-18.4 18.5 24.4
>=24.5 TOTAL N
0.000 0.000 0.000 0.000 0.229 0.092 0.000 0.000 0.000 0.321 NNE 0.000 0.000 0.046 0.183 0.595 0.641 0.046 0.000 0.000 1.511 NE 0.000 0.000 0.092 0.092 0.137 0.229 0.000 0.000 0.000 0.549 ENE 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 E
0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SSE 0.000 0.000 0.000 0.000 0.092 0.092 0.000 0.000 0.000 0.183 S
0.000 0.000 0.046 0.092 0.046 0.046 0.000 0.000 0.000 0.229 SSW 0.000 0.000 0.092 0.183 0.321 0.092 0.000 0.000 0.000 0.687 SW 0.000 0.000 0.046 0.183 0.046 0.000 0.000 0.000 0.000 0.275 WSW 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0 000 0.000 0.046 W
0.000 0.000 0.046' O.046 0.000 0.000 0.000 0.000 0.000 0.092 WNW 0.000 0.000 0.000 0.000:
0.000 0.000 0.000 0.000 0.000 0.000 CW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NNW 0.000 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.092 T'iBTOTAL 0.000 0.000 0.412 0.824 1.557 1.236 0.046 0.000 0.000 4.075 TOTAL HOURS OF VALID STABILITY DBSERVATIDNS 2204 TOTAL HOURS OF STABILITY CLASS A 89 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY CLASS A 89 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY DBSERVAT!DNS 2154 TOTAL HOURS CALM 0
METEOROLOGICAL FACILITY:
Sequoyah Nuclear Plant STABILITY BASED ON DELTA T BETWEEN-9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 19990126 MEAM WIND SPEED = 6.60 COTE: TOTALS AND SUBTOTALS ARE DBTAINED FROM UNROUNDED NUMBERS
y
-s l
JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECT!DN FOR STABILITY CLASS B
(-1.9< DELTA Tc=*1.7 C/100 M)
Sequoyah Nuclear Plant CCT 1, 1998 - DEC 31, 1998 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 l
C 0.000 0.000 0.092 0.046 0.137 0.229 0.000 0.000 0.000 0.504 CNE
'0.000 0.000 0.137 0.504 0.229 0.412 0.000 0.000 0.000 1.282 NE 0.000' O 000 0.000 0.504 0.092 0.092 0.000 0.000 0.000 0.687 ENE 0.000 0.000 0.046 0.000 0.000 0.000' O.000 0.000 0.000 0.046 E
0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.092 l
ESE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 SE 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 SSE 0.000 0.000 0.000 0.000 0.137 0.092 0.000 0.000 0.000 0.229 C
0.000 0.000 0.046 0.000 C.046 0.000 0.000 0.000 0.000 0.092 SSW 0.000 0.000 0.000 0.137 0.046 0.000 0.000 0.000 0.000 0.183 SW 0.000 0.000 0.046 0.458 0.046 0.000 0.000 0.000 0.000 0.549 WCW 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 0
0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 WWW 0.000 0.000 0.046 0.000 0.000' O.000 0.000 0.000 0.000 0.046 N3 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 NN9 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 SUBTOTAL 0.000 0.000 0.504 1.694 0.916 0.824 0.000 0.000 0.000 3.938 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2204 TOTAL HOURS OF STABILITY CLASS B' 86 TOTAL HOURS OF VAllD WlND DIRECTION-WIND SPEED STABILITY CLASS B 86 j
TOTAL HOURS OF VALID WIND DIRECTION WIND SPEED-STABILITY OBSERVATIONS 2184 l
TOTAL HOURS CALM 0
ll' I
METEOROLOGICAL FACILITY:
Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 19990126 MEAN WIND SPEED = S 66 COTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS
t e
l JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRETTION FOR STABILITY CLASS C
(-1.7< DELTA Tc=-1.5 C/100 M)
Sequoyah Nuclear Plant OCT 1, 1998 DEC 31, 1998 l
WIND WIND SPEED (MPH) l DIRECV!ON 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 l
N 0.000 0.000 0.000 0.046 0.092 0.183 0.000 0.000 0.000 0.321 l
NNE 0.000 0.000 0.092 0.504 0.412 0.229 0.000 0.000 0.000 1.236 NE 0.000 0.000 0.5 04 0.595 0.183 0.046 0.000 0.000 0.000 1.328 l
ENE 0.000 0.000 0.229 0.000 0.000 0.000 0.000 0.000 0.000 0.229 E
0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.046 l
ESE 0.000 0.000 0.137 0.000 0.000 0.000 0.000 0.000 0.000 0.137 SE 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046
$$E 0.000 0.000 0.046 0.046 0.046 0.046 0.000 0.000 0.000 0.183 s
0.000 0.000 0.137 0.092 0.046 0.046 0.000 0.000 0.000 0.321 SSW 0.000 0.000 0.092 0.366 0.046 0.000 0.000 0.000 0.000 0.504 l
SW 0.000 0.000 0.092 0.137 0.046 0.000 0.000 0.000 0.000 0.275 WSW 0.000 0.000 0.046 0.000 0.046 0.000 0.000 0.000 0.000 0.092 W
0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.092 Whd 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.046 N3 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 l
NNW 0.000 0.000 0.000 0.046
- 0. 0' '
O.000 0.000 0.000 0.000 0.092 1
l SUBTOVAL 0.000 0.000 1.419 1.969 1.007 0.549 0.000 0.000 0.000 4.945 l
l VOTAL HOURS OF VALID STABILITY OBSERVATIONS 2204 TOTAL HOURS OF STABILITY CLASS C 108 70TAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY CLASS C 108 70TAL HOURS OF VALID WIND DIRECTION WIND SPEED-STABILITY OBSERVATIONS 2184 TOTAL HOURS CALM 0
METEOROLOGICAL FACILITY:
Sequoyah Nuclear Plant SVABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTlhN MEAGURED AT 9.73 METER LEVEL OATE PRINTED: 19990126 j
MEAN WIND SPEED s 4.76 l
l NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS l
l l
l 8
l l
JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR l
STABILITY CLASS D
(-1.5< DELTA T<=-0.5 C/100 M) i Sequoyah Nuclear Plant OCT 1,1998 DEC 31,1998 l
l WIND WIND SPEED (MPH) 9IRECTION 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 l
C 0.005 0.183 1.557 1.786 1.557 0.870 0.000 0.000 0.000 5.958 NNE 0.008 0.137 2.335 2.564 2.244 1.832 0.000 0.000 0.000 9.114 NE 0.004 0.092 1.099 0.916 0.458 0.183 0.000 0.000 0.000 2.751 ENE 0.002 0.092 0.458 0.046 0.000 0.000 0.000 0.000 0.000 0.597 E
0.001 0.046 0.321 0.000 0.000 0.000 0.000 0.000 0.000 0.367 ESE 0.001 0.137 0.275 0.000 0.000 0.000 0.000 0.000 0.000 0.413 SE 0.001 0.046 0.229 0.046 0.000 0.000 0.000 0.000 0.000 0.321 SSE 0.002 0.000 0.687 0.046 0.321 0.137 0.000 0.000 0.000 1.193 0.006 0.092 1.877 1.190 0.504 0.458 0.000 0.000 0.000 4.127 SSW 0.006 0.137 1.923 2.839 0.733 0.229 0.000 0.000 0.000 5.867 SW 0.003 0.092 1.007 0.916 0.137 0.046 0.000 0.000 0.000 2.201 WSW 0.001 0.092 0.275 0.183 0.000 0.000 0.000 0.000 0.000 0.551 0
0.00) 0.046 0.229 0.137 0.046 0.000 0.000 0.000 0.00U 0.459 WWW 0.001 0.046 0.137 0.000 0.000 0.000 0.000 0.000 0.000 0.184 NW 0.001 0.137 0.321 0.366 0.000 0.229 0.000 0.000 0.000 1.055 NNW 0.002 0.229 0.321 0.412 0.916 0.092 0.000 0.000 0.000 1.971
$UBTOTAL 0.046 1.603 13.049
- 11. 47 6.914 4.075 0.000 0.000 0.000 37.134 TOTAL WOURS OF VALID STABILITY OBSERVATIONS 2204 TOTAL HOURS OF STABILITY CLASS D 816 TOTAL HOURS OF VALID WIND DIRECTION WIND SPEED-STABILITY CLASS D 811 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY DBSERVATIONS 2184 TOTAL HOURS CA!M i
i4ETEOR010GICAL FACILITY:
Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 19990126 MEAN WIND SPEED = 4.46 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS
j.
s
['8 l
JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS E
( 0.5< DELTA Tc= 1.5 C/100 M)
Sequoyah Nuclear Plant DCT -1, 1998 DEC 31, 1998 WIND WIND SPEED (MPH)
DIRECTION CALM 0.6 1.4 1.5 3.4 3.5 5.4 5.5 7.4 7.5-12.4 12.5 18.4 18.5 24.4
>=24.5 TOTAL N'
O.043 0.641
'2.244 1.511 1.007 0.000 0.000 0.000 0.000 5.446 CNE 0.047 0.275 2.839 1.786 0.504 0.000 0.000 0.000 0.000 5.450 i-NE 0.007 0.2 75 0.183 u.092 0.092 0.000 0.000 0.000 0.000 0.648 l'
ENE 0.003 0.183 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.232 E
0.001.
0.092 0.000.
0.000 0.000 0.000 0.000 0.000 0.000 0.093 l.
l ESE 0.001 0.092 0.000 0.000 0.000 0.000 0.000 u.000 0.000 0.093 SE 0.003 0.046 0.137 0.000 0.000 0.000 0.000 0.000 0.000 0.186 SSE 0.007 0.137 0.321 0.137 0.046 0.000 0.000-0.000 0.000 0.648 s
0.032 0.687 1.465 0.549 0.229 0.2 75 0.000 0.000 0.000 3.237 SSW 0.041 0.321 2.381 1.190 0.870 0.000 0.000 0.000 0.000 4.803 SW 0.036 0.412 2.015 0.870 0.2 75 0.046 0.000 0.000 0.000 3.654 USW 0.017 0.183 0.916 0.?75 0.000 0.000 0.000 0.000 0.000 1.390 W
0.005 0.092 0.229
- 0. 5/5 0.000 0.000 0.000 0.000 0.000 0.600 WNW 0.010 0.183 0.504 0.J46 0.000 0.000 0.000 0.000 0.000 0.743 N3 0.011 0.137 0.595 0.458 0.000 0.000 0.000 0.000 0.000 1.201 NNW 0.010 0.092 0.549 0.iB3 0.183 0.046 0.000 0.000 0.000 1.063 SUBTOTAL 0.2 75 3.846 14.423 7.3 72 3.205 0.366 0.000 0.000 0.000 29.487 l
TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2204 TOTAL HOURS OF STABILITY CLASS E 655 TOTAL HOURS OF VALID WIND DIRECTION WIND SPEED STABILITY CLASS E 644 TOTAL HOURS OF VALID WIND DIRECTION WIND SPEED-STABILITY OBSERVATIONS 2184 TOTAL HOURS CALM 6
METEOROLOGICAL FACILITY:
Sequoyah Nuclear Plant SVABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS UIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 19990126 MEAN WIND SPEED = 3.16 COTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS i
L
4 0
l JOINT PERCENTAGE FREQUENCIES OF W1ND SPEED BY WIND DIRECTION FOR STABILITY CLASS F
( 1.5< DELTA Tc= 4.0 C/100 M)
Sequoyah Nuclear Plant DCT 1,'1998 DEC 31, 1998 WIND WIND SPEED (MPH)
DIREC710N CALM 0.6 1.4 1.5 3.4 3.5 5.4 5.5 7.4 7.5-12.4 12.5 18.4 18.5 24.4
>=24.5 TOTAL
'N 0.015 0.321 1.923 0.458 0.000 0.000 0.000 0.000 0.000 2.716 CNE 0.039 -
0.824 5.220 0.183 0.000 0.000 0.000 0.000 0.000 6.266 NE 0.007 0.412 0.595 0.000 0.000 0.000 0.000 0.000 0.000 1.014 l
ENE 0.003 0.412 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.415 l
E 0.005 0.687 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.737 ESE 0.002 0.321 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.369 l
SE 0.001 0.137 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.184 SSE 0.004 0.412 0.137 0.000 0.000 0.000 0.000 0.000 0.000 0.553 S
0.003 0.183 0.321 0.000 0.000 0.000 0.000 0.000 0.000 0.507 SSW 0.006 0.183 0.687 0.000 0.000 0.000 0.000 0.000 0.000 0.876 SW 0.001 0.046 0.183 0.000 0.000 0.000 0.000 0.000 0.000 0.230 WSW 0.002 0.046 0.229 0.000' O.000 0.000 0.000 0.000 0.000 0.277 W
0.000 0.046 0.000 0.000-0.000 0.000 0.000 0.000 0.000 0.046 l
WNW 0.000 0.000 0.046 0.000 0.000 0.000 0,000 0.000 0.000 0.046 N3 0.001 0.000 0.183 0.092 0.000 0.000 0.000 0.000 0.000 0.276 NOW 0.003 0.137 0.321 0.229 0.000 0.000 0.000 0.000 0.000 0.690 i
SUBTOTAL 0.092 4.167 9.982 a.962 0.000 0.000 0.000 0.000 0.000 15.201 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2204 TOTAL HOURS OF STABILITY CLASS F 336 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY CLASS F 332 TOTAL HOURS OF VALID WIND DIRECTION WIND SPEED-STABILiff OBSERVATIONS 2184 TOTAL HOURS CALM 2
]
i i
l.
METEOROLOGICAL FACILITY:
Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN - 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEA:;URED AT 9.73 METER LEVEL DATE PRINTED: 19990126 l
MEAN WIND SPEED = 1.98 l
l NOTE: TOTALS AND SUBT01ALS ARE OBTAINED FROM UNdOUNDED NUMBERS l
4 e
J0lNT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS G (DELTA T > 4.0 C/100 M)
Sequoyah Nuclear Plant OCT 1, 1998 DEC 31, 1998 WIND WIND SPEED (MPH)
DIRECTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5 12.4 12.5-18.4 18.5 24.4
>=24.5 TOTAL N
0.002 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.093 CNE 0.029 0.275 1.328 0.000 0.000 0.000 0.000 0.000 0.000 1.632 KE 0.021 0.412 0.733 0.000 0.000 0.000 0.000 0.000 0.000 1.166 ENE 0.004 0.137 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.233 E
0.004 0.229 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.233 ESE 0.003 0.137 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.186 SE 0.004 0.183 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.233 SSE 0.005 0.229 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.280 S
0.007 0.321 0.092 0.000 0.000 0.000 0.000 0.000 0.000 0.420 SSW 0.006 0.000 0.321 0.046 J.000 0.000 0.000 0.000 0.000 0.372 S')
0.004 0.000 0.229 0.000 0.000 0.000 0.000 0.000 0.000 0.233 WSW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 U
0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 NW 0.001 0.000 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.047 NNW 0.001 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.092 SUBTOTAL 0.092 1.969 3.068 0.092 0.000 0.000 0.000 0.000 0.000 5.220 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2204 TOTAL HOURS OF STABILITY CLASS G 114 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED STABILITY CLASS G 114 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2184 TOTAL HOURS CALM 2
METEOROLOGICAL FACILITY:
Sequoyah Nuclear Plant STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 19990126 MEAN WIND SPEED = 1.61 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS
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