ML20138F243
| ML20138F243 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 12/31/1996 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML20138F231 | List: |
| References | |
| NUDOCS 9705050312 | |
| Download: ML20138F243 (47) | |
Text
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ENCLOSO 82 i
SEQUOYAH NUCLEAR PLANT i
RADIOLOGICAL IMPACT ASSESSMFET REPORT t
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9705050312 970430 f' PDR ADOCK 05000327 R
~_. _ _ _. _ -.. _.. _..._ _ --_ _._ _ _ _ _ _ _ _. - _ _. _ -_
l INTRODUCTION I
Potential doses to maximum individuals and the population around Sequoyah are calculated i
for each quarter as required in Section 5.2 of the Offsite Dose Calculation Manual (ODCM).
i Measured plant releases for the reporting period are used to estimate these doses. Dispersion i
of radioactive effluents in the environment is estimated using meteorological data and riverflow data measured during the period. In tnis report, the doses resulting from releases are described and compared to limits established for Sequoyah.
I DOSE LIMITS i
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 Technical Specification limits which govem the concentrations of radioactivity and doses j
permissible in unrestricted areas. This ensures that radioactive effluent releases are As Low As Reasonably Achievable.
i The limits for doses in unrestricted areas from airborne noble gases releases are:
j Less than or equal to 5 n' rad per quarter and i
10 mrad per year (per reactor unit) for gamma radiation, j
and-Less than or equal to 10 mrad per quarter and 20 mrod per year (per reactor unit) for beta radiation.
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The limit for the dose to a member of the general public in on unrestricted area from iodines I.
and particulates released in airborne effluents is:
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Less than or equal to 7.5 mrem per quarter and l
15 mrem per year (per reactor unit) to any organ.
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l The limit for doses to a member of the general public from radioactive material in liquid effluents released to unrestricted areas, is:
4 Less than or equal to 1.5 mrem per quarter and 3
3 mrem per year (per reactor unit) to the total body, and-Less than or equal to 5 mrem per quarter and 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 C re Standard of 40 CFR 190, are:
Less than or equal to 25 mrem per year to the total body, i
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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Radislagicallmpact Asssssm3nt Sequoyah Nuclear Plant i
January - December 1996 i
Page 2 of 17 i
DOSE CALCULATIONS Estimated doses to the public are determined using computer models (the Gaseous Effluent Licensing Code, GELC,.and the Quarterly Water Dose Assessment Code, QWATA). These models are based on guidance provided by the NRC (in Regulatory Guides 1.109,1.111 and 1.113) for determining the potential dose to individuals and populations living in the vicinity of the plant. The area around the plant is analyzed to determine the pathways through which the public may receive a dose. The doses calculated are a representation of the dose to a
" maximum exposed individual." Some of the factors used in these calculations (such as ingestion rates) are maximum values. Many of these factors are obtained from NUREG/CR-1004. The values chosen will tend to overestimate the dose to this " maximum" person. The
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expected dose to actualindividuals is lower. The calculated doses are presented in Tables 1 through 9.
DOSES FROM AIRBORNE EFFLUENTS 1
i For airborne effluents, the public con be exposed to radiation from several sources: direct radiation from the radioactivity in the air, direct radiation from radioactivity deposited on the ground, inhalation of airborne radioactivity, ingestion of vegetation which contains radioactivity deposited from the atmosphere, and ingestion of milk and beef which contains radioactivity deposited from the atmosphere onto vegetation and subsequently eaten by milk and beef animals.
Airborne Discharae Points All releases from Sequoyah are considered ground-level releases. The ground-level Joint I
Frequency 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 i
are presented for each quarter in Attachment 1.0.
Meteoroloalcal Data Meteorological variables at Sequoyah are measured continuously. Measurements collected include wind speed, wind direction, and temperature at heights of 10, 46, and 91 meters above the ground. Quarterly jo'nt frequency distributions (JFDs) are calculated for each release point using the appror>riate levels of meteorological data.
A joint frequency distribution gives the percentage of the time in a quarter that the wind is blowing out of a particular upwind compass sector in a particular range of wind speeds for a given stability class A through G. The wind speeds are divided into nine wind speed ranges. Calms are 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.
RadialsgicalImpact Asssssmsnt Sequoyah Nuclear Plant January-December 1996 Page 3 of 17 External Exoosure 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 Sequoyah ODCM.
The highest of these doses is then selected.
Submersion Dose External doses to the skin and total body, due to submersion in a cloud of noble gases, are estimated for the nearest residence in each sector. The residence with the highest dose is then selected from all sectors.
Oroan Dose Dosos 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 i
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 ' rom airborne effluents are presented in Tables 1 through 4.
Radislagicalimpact Asssssmsnt Sequoyah Nuclear Plant January - December 1996 Page 4 of 17 DOSES FROM LIQUID EFFLUENTS For liquid effluents, the public con 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 Sequoyah.
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 detailin the Sequoyah Nuclear Plant ODCM.
Liauid Release Points and River Data Radioactivity concentrations in the Tennessee River are calculated assuming that releases in liquid effluents are continuous. All routine liquid releases from Sequoyah, 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 complete!v mixed at the first downstream dom, at Tennessee River Mile 471.0.
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 l
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 (Chickamaugo Dam). The maximum individual dose from drinking water is assumed to be that calculated at the nearest downstream public water supply (E. I. 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, i
consumes fish caught from the Tennessee River between Sequoyah 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 outfal! 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 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. Doses from external pathways and inhalation are based on the 50-mile human population distribution. Ingestion population doses are calculated assuming that each individual consumes milk, vegetables, and meat produced with the sector annulus in which he tesides.
Doses from external pathways and inhalation are based on the 50-mile human population distribution.
RadiclogicalImpact Ass:ssmsnt Sequoyah Nuclear Plant January - December 1996 Page 5 of 17 Population doses for total body and the maximum exposed organ due to liquid effluents are calculated for the entire downstream Tennessee River Population. Water ingestion population doses are calculated using actual population figures for downstream public water supplies.
Fish ingestion population doses are calculated assuming that all sport fish caught in the Tennessee River are consumed by the Tennessee River population. Recreation population doses are calculated using actual recreational data on the number of shoreline visits at downstream locations.
Population dose estimates for airborne and liquid effluents are presented in Tables 1 through 8.
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Rcdir,l::gicalImpact Ass':;ssm:;nt l
Sequoyah Nuclear Plant January - December 1996 Page 6 of 17 DIRECT RADIATION
' External gamma radiation levels were measured by thermoluminescent dosimeters (TLDs) deployed around Sequoyah. The quarterly gamma radiation levels determined from these TLDs during this reporting period averaged approximately 15.7 mR/ quarter at onsite stations and approximately 14.5 mR/ quarter at offsite stations, or approximately 1.2 mR/ quarter higher onsite than at offsite stations. This is consistent with levels reported at TVA's non operating nuclear power plant construction sites where the overage radiation levels onsite are generally 2-6 mR/ quarter higher than the levels offsite. This may be attributable to natural variations in environmental radiation levels, earth moving activities onsite, the mass of concrete employed in the construction of the plants, or other undetermined influences. Fluctuations in natural background dose rates and in TLD readings tend to mask any smallincrements which may be due to plant operations.
Thus, there was no identifiable increase in dose rate levels attributable to direct radiation from plant equipment and/or gaseous effluents.
DOSE TO A MEMBER OF THE PUBLIC INSIDE THE UNRESTRICTED AREA BOUNDARY As stated in the Sequoyah 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 on entire workyear (2000 l
hours). Results from onsite TLD measurements for the calendar year in question indicate that the highest onsite TLD reading was 366 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 70 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 annuallimit of 100 mrem.
TOTAL DOSE To determine compliance with 40 CFR 190, annual total dose contributions to the maximum individual from Sequoyah radioactive effluents and all other nearby uranium fuel cycle sources are considered.
The annual dose to any organ other than thyroid for the maximum individual is conservatively estimated by summing the following doses: the total body air submersion dose for each l
quarter, the critical organ dose (for any organ other than the thyroid) from airborne effluents j
for each quarter from ground contamination, inhalation and ingestion, the total body dose l
from liquid effluents for each quarter, the maximum organ dose (for any organ other than the l
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 the 40 CFR 190 limit for total body or any organ dose (other than thyroid) to c termine compliance.
The annual thyroid dose to the maximum individualis conservatively estimated by summing the following doses: the total body air submersion dose for each quarter, the thyroid dose from
Radi:l:gicallmpcct Ass;ssm:nt Sequoyah Nuclear Plant January - December 1996 Page 7 of 17 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 environmen'al 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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i RodislogicalImpact Asssssm2nt i
Sequoyah Nuclear Plant January - December 1996 Page 8 of 17 Table 1 Doses from Airborne Effluents i
First Quarter Individual Dose.1 Pathway Dose Quarterly Percent of Location Umit Limit Sector / Distance
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External Gamma Air 1.09E-03 mrod 5 mrad 0.022 SSW/1840 Beta Air 1.25E-03 mrod 10 mrod 0.013 Submersion Total Body 7.88E-04 mrod 10 mrad 0.008 SSW/2134 Skin 1.39E-03 mrod 10 mrad 0.014 Organ Doses Child / Thyroid 1.04E-02 mrem 7.5 mrem 0.14 SSW/2707 Child / Total Body 1.04E-02 mrem 7.5 mrem 0.14 Population Doses Total Body Dose 7.94E-02 man-rem Maximum Organ Dose (organ) 7.94E-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-remlyear (based on 90 mremlyr for natural background).
Radi:l:gicalImpact Asssssmsnt l
Sequoyah Nuclear Plant January - December 1996 Page 9 of 17 Table 2 Doses from Airborne Effluents Second Quarter l
Individual Doses Pathway Dose Quarterly Percent of Location Limit Limit Sector / Distance External Gamma Air 1.43E-03 mrad 5 mrad 0.029 NNW/730 Beto Air 1.60E-03 mrad 10 mrad 0.016 Submersion Total Body 1.05E-03 mrad 10 mrod 0.010 NNW/841 Skin 1.86E-03 mrod 10 mrad 0.019 Organ Doses Child / Thyroid 7.74E-03 mrem 7.5 mrem 0.103 NNW/841 Child / Total Body 7.72E-03 mrem 7.5 mrem 0.103 Population Doses Total Body Dose 2.25E-02 man-rem f
Maximum Organ Dose (organ) 2.26E-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 mremlyr for natural background).
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R:disisgicolimpact Asssssment Sequoyah Nuclear Plant January-December 1996 Page 10 of 17 Table 3 Doses from Airborne Effluents Third Quarter lpdividual Doses Pathway Dose Quarterly Percent of Location Limit Limit Sector / Distance External Gamma Air 1.27E-03 mrad 5 mrod 0.025 S/1570 Beto Air 2.14E-03 mrad 10 mrad 0.021 l
I Submersion Total Body 8.22E-04 mrad 10 mrao 0.008 S/1931 Skin 1.63E-03 mrad 10 mrad 0.016 l
Organ Doses i
Child / Thyroid 1.90E-02 mrem 7.5 mrem 0.253 S/2249 Child / Total Body 1.90E-02 mrem 7.5 mrem 0.253 Pooulation Doses Total Body Dose 7.53E-02 man-rem Maximum Organ Dose (organ) 7.53E-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 mremlyr for natural background).
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Radi:logicalImpact Asssssm:nt Sequoyah Nuclear Plant January - December 1996 Page 11 of 17 Table 4 Doses from Airbome Effluents Fourth Quarter Individual Doses Pathway Dose Quarterly Percent of Location Limit Umit Sector / Distance i
External Gamma Air 2.18E-03 mrod 5 mrad 0.044 S/1570 Beta Air 3.98E-03 mrad 10 mrad 0.040 Submersion Total Body 1.39E-03 mrad 10 mrod 0.014 S/1931 Skin 2.80E-03 mrad 10 mrod 0.028 i
i Organ Doses Child / Thyroid 1.85E-02 mrem 7.5 mrem 0.247 S/2249 Child / Total Body 1.84E-02 mrem 7.5 mrem 0.245 i
Population Doses Total Body Dose 1.26E-01 man-rem Maximum Organ Dose (organ) 1.27E-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).
Rodisingicallmpact AsssssmInt Sequoyah Nuclear Plant l
January - December 1996 l
Page 12 of 17 l
Table 5 Doses from Liquid Effluents j
First Quarter l
j individual Doses frem)
Age Group Organ Dose Quarterly Percent Limit of Limit Adult Total Body 1.7E-02 1.5 mrem
<1%
Adult / Teen Liver 2.3E-02 5 mrem
<1%
Child / Infant Thyroid 3.2E-03 5 mrem
<1%
Average Riverflow past SQN (cubic feet per second): 59,578 Population Dgsgi l
Total Body Dose 1.6E-01 man-rem l
Maximum Organ Dose (organ) 1.9E-01 man-rem (liver) l Population doses can be compared to the natural background dose for the entire 50-mile population of about 95,400 man-remlyear (based on 90 mrem /yr for natural background).
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Rcdisl:gicallmpact Assrssmsnt Sequoyah Nuclear Plant
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January - December 1996 Page 13 of 17 Table 6 Doses from Liquid Effluents Second Quarter individual Doses (rem)
Age Group Organ Dose Quarterly Percent Limit of Limit 1
Adult Total Body 1.9E-02 1.5 mrem 1%
i Adult / Teen Liver 2.5E-02 5 mrem
<1%
Child Thyroid 4.5E-03 5 mrem
<1%
i Average Riverflow past SQN (cubic feet per second): 27,235 Population Doses Total Body Dose 3.4E-01 man-rem Maximum Organ Dose (organ) 3.7E-01 man-rem (liver)
Population doses can be compared to the natural background dose for the entire 50-mile population of about 95,400 man-remlyear (based on 90 mrem /yr for natural background).
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Radi:l:gicalImpact Asssssmsnt Sequoyah Nuclear Plant January-December 1996 Page 14 of 17 Table 7 Doses from Liquid Effluents Third Quarter Individual Doses frem)
Age Group Organ Dose Quarterly Percent Limit of limit Adult Total Body 5.6E-03 1.5 mrem
<1%
Adult / Teen Liver 7.1 E-03 5 mrem
<1%
Child Thyroid 2.1 E-03 5 mrem
<1%
Average Riverflow past SQN (cubic feet per second): 29,927 i
Population Doses Total Body Dose 1.7E-01 man-rem Maximum Organ Dose (organ) 1.8E-01 man-rem (Liver, Bone, GIT)
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 mremlyr for natural background).
I Radistsgicallmpact Asssssmsnt Sequoyah Nuclear Plant January - December 1996 Page 15 of 17 Table 8 Doses from Liquid Effluents Fourth Quarter Individual Doses frem)
Age Group Organ Dose Quarterly Percent Limit of Limit Adult Total Body 2.l E-03 1.5 mrem
<1%
Child Liver 2.5E-03 5 mrem
<1%
Child Thyroid 1.7E-03 5 mrem
<1%
Average Riverflow past SQN (cubic feet per second): 48,785 Population Doses Total Body Dose 1.lE-01 man-rem Maximum Organ Dose (organ) 1.1 E-01 man-rem (Throid, Kidney, Lung, Liver, Bone, GIT)
Population doses con be compared to the natural background dose for the entire 50-mile population of about 95,400 man-remlyear (based on 90 mrem /yr for natural background).
Radirlogicallmp ct Ass:ssm3nt Sequoyah Nuclear Plant January - December 1996 Page 16 of 17 1
Table 9 Total Dose from fuel Cycle First Second Third Fourth Dose Quarter Quarter Quarter Quarter Total Body or any Organ (except thyroid)
Total body air submersion 7.88E-04 1.05E-03 8.22E-04 1.39E-03 Critical organ dose (air) 1.04E-02 7.74E-03 1.90E-02 1.84E-02 Total body dose (liquid) 1.7E-02 1.9 E-02 5.6E-03 2.1 E-03 Maximum organ dose (liquid) 2.3E-02 2.5E-02
- 7. l E-03 2.5E-03 Direct Radiation Dose 0.0E-00 0.0E-00 0.0E-00 0.0E-00 Total 5.1 E-02 5.3E-02 3.3E-02 2 4E-02 Cumulative Total Dose (Total body or any other orgar. mrem 1.6 E-01 Annual Dose limit (mrem) 2.50E+01 Percent of Limit
<1%
Thyroid Dose (mrem)
Total body air submersion 7.88E-04 1.05E-03 8.22E-04 1.39E-03 Thyroid dose (airborne) 1.04E-02 7.74E-03 1.90E-02 1.85E-02 Total body dose (liquid) 1.7E-02 1.9E-02 5.6E-03 2.1 E-03 Thyroid dose (liquid) 3.2E-03 4.5E-03 2.1 E-03 1.7E-03 Direct Radiation Dose 0.0E-00._
0.0E-00 0.0E-00 0.0E-00 Total 3.1 E-02 3.2E-02 2.8E 02 2.4E-02 Cumulative Total Dose (Thyroid) mrem 1.2 E-01 Annual Dose Limit (mrem) 7.50E+01 Percent of Limit
<1%
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RadligicclImp;ct Ass;ssm:nt Sequoyah Nuclear Plant January - December 1996 Page 17 of 17 1.0 1
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JOIRT PRRCE"tTATE FREQUENCIES OF UIRD SP! FED BY WIND DIRMCTIO7 FOR STABILITY CLASS A (DELTA T(=-1.9 C/100 M)
SEQUOYAH NUCLEAR PLANT JAN 1,
96 - MAR 31, 96 WIED 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 U
0.000 0.000 0.000 0.144 0.192 0.048 0.000 0.000 0.000 0.384 g
ENE 0.000 0.000 0.048 0.192 0.240 0.672 0.000 0.000 0.000 1.152 9
i CE 0.000 0.000 0.096-0.096 0.336 0.096 0.000 0.000 0.000 0.624 ENE 0.C00 0.000 0.048 0.048 0.048 0.000 0.000 0.000 0.000 0.144 E
0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.048 ESE 0.000 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.048 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 0.000 0.000 0.000 0.000 0.000 0.000 S
0.000 0.000 0.048 0.096 0.000 C.144 0.000 0.000 0.000 0.288
[
SSW 0.000 0.000 0.096 0.096 1.008 1.008 0.000 0.000 0.000 2.208 i*
SW 0.000 0.000 0.048 0.096 0.576 0.144 0.000 0.000 0.000 0.864 USW 0.000 0.000 0.000 0.048 0.000 0.144 0.000 0.000 0.000 0.192 W
0.000 0.000 0.000 0.000 0.192 0.096 0.000 0.000 0.000 0.288
%"NW 0.000 0.000 0.000 0.000 0.192 0.336 0.000 0.000 0.000 0.528 NW 0.000 0.000 0.000 0.000 0.240 0.288 0.000 0.000 0.000 0.528 RNW 0.000 0.000 0.000 0.000 0.144 0.432 0.048 0.000 0.000 0.624 SU3 TOTAL 0.000 0.000 0.432 0.864 3.169 3.409 0.048 0.000 0.000 7.921 TOTAL NOURS OF VALID STABILITY OBSERVATIONS 2162 167 TOTAL HOURS OF STABILITY CLASS A TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS A 165 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2083 i
0 TOTAL HOURS CALM E
METEOROLOGICAL FACILITY:
SEQUOYAN 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: 24-APR-96 7.09 r
MEAN WIND SPEED
=
NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS g
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JOICT P ESCE L* TAT E FEEQUE?CI15 OF UIND SPEED BY YJIPD DIRECTIe3 FAN i
STABILITY CLASS B
(-1.9< DELTA T(=-1.7 C/100 M)
SEQUOYAN NUCLEAR-PLANT JAN 1,
96 - MAR 31, 96 I
WIND SPEED (MPN) g WIND DIRE CTION CALM 0.6-1.4 1.5-3.4 3.5-5.4 5.5-7.4 7.5-12.4 12.5-18.4 18.5-24.4
>=24.5 TOTAL i
i.
D 0.000 0.000 0.000 0.000 0.048 0.144 0.000 0.000 0.000 0.192 ENE 0.000 0.000 0.096
-0.144 0.288 0.528 0.000 0.000 0.000
.1.056 i
EE 0.000 0.000 0.048 0.192 0.096 0.048 0.000 0.000 0.000 0.384 i
ENE 0.000 0.000 0.240 0.096 0.000 0.000 0.000 0.000 0.000 0.336 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 0.048 0 000 0.000 0.000 0.000 0.000 0.000 0.048 i
SE 0.000 0.000 0.048
.0.000 0.000 0.000 0.000 0.000 0.000 0.048 3
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SSE 0.000 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.048 S
0.000 0.000 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.048 i'
SSW 0.000 0.000 0.048 0.192 0.384 0.000 0.000 0,000-0.000 0.624 SW 0.000 0.000 0.000 0.144 0.096 0.240 0.000 0.000 0.000 0.480 t
WSW 0.000 0.000 0.048 0.000 0.000 0.192 0.000 0.000 0.000 0.240
}
W 0.000 0.000 0.000 0.048 0.000 0.048 0.048 0.000 0.000 0.144 WNW 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 l
EW 0.000 0.000 0.000 0.000 0.096 0.144 0.000 0.000 0.000 0.240 I
KNW 0.000 0.000 0.000 0.048 0.144 0.096 0.000 0.000 0.000 0.288 SUBTOTAL 0.000 0.000 0.576 0.912 1.200 1.440 0.048 0.000 0.000 4.177 TOTAL NOURS OF VALID STABILITY OBSERVATIONS 2162 87 TOTAL NOURS OF STABILITY CLASS B TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 87 TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2083 0
TOTAL NOURS CALM-t METEOROLOGICAL FACILITY:
SEQUOYAN NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS i
WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL I
DATE PRINTED: 24-APR-96
?
MEAR WIND SPEED =
6.46 i
l 20TE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS i
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JOIET P E*2C E NTAtti F1* E QU E"1CIE S OF WICD SPEED BY WI!TD DTEECTIO*1 Ff! R STABILITY CLASS C
(-1.7<
DELTA T(=-1.5 C/100 M)
SEQUOYAN NUCLEAR PLANT JAN 1,
96
-MAR 31, 96 WI2D
-WIND SPEED (MPN)
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 E
0.000 0.000 0.000 0.048 0.144 0.240 0.000 0.000 0.000 0.432 ENE 0.000 0.000 0.048 0.480 0.288 0.144 0.000 0.000 0.000 0.960 CE 0.000 0.000 0.048 0.192 0.144 0.096 0.000 0.000 0.000 0.480 ENE 0.000 0.000 0.048 0.000 0.048 0.000 0.000 0.000 0.000 0.096 E
0.000 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.048 ESE 0.000 0.000 0.096 0.000 0.000 0.000 0.000 0.000 0.000 0.096 EE 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.048 SSE 0.000 0.000 0.048 0.000 0.000 0.048 0.000 0.000 0.000 0.096 S
0.000 0.000 0.240 0.096 0.048 0.048.
0.000 0.000 0.000 0.432 SSW 0.000 0.000 0.096 0.240 0.240 0.048
-0.000 0.000 0.000 0.624 SW 0.000 0.000 0.096 0.096 0.144 0.048 0.000 0.000 0.000 0.384 TSw 0.000 0.000 0.000 0.000 0.000 0.096 0.000 0.000 0.000 0.096 w
0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 TNw 0.000 0.000 0.000 0.000 0.048 0.096 0.000 0.000
.0.000 0.144 Nw 0.000 0.000 0.000 0.000 0.144 0.096 0.000 0.000 0.000 0.240 ENw 0.000 0.000 0.000 0.000 0.144 0.144 0.048 0.000 0.000 0.336 SUDTOTAL 0.000 0.000 0.768
.1.200 1.392 1.104 0.048 0.000 0.000 4.513 TOTAL NOURS OF YALID STABILITY OBSERVATIONS 2162 TOTAL NOURS OF STABILITY CLASS C 99 TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS C 94 TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2083 TOTAL NOURS CALM 0
METEOROLOGICAL FACILITY:
SEQUOYAN 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: 24-APR-96 MEAN WIND SPEED =
6.07 J
EOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS l
1 I
I
JOIT*T PERCE*'TA13 FREQUETCIES OF WII*D SPEED 2Y WI!*D DIR E CTI@'3 FRS STABILITY CLASS D
(-1.5< DELTA Tc=-0.5 C/100 M)
SEQUOYAN NUCLEAR PLANT JAN 1,
96 - MAR 31, 96 WICD WIND SPEED (MPN).
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 U
0.000 0.048 0.720 1.296 1.536 1.728 0.000 0.000 0.000 5.329 ENE 0.000 0.000 1.680 1.968 1.680 2.208 0.000 0.000 0.000 7.537 CE 0.000 0.192 0.624 0.480 0.144 0.000 0.000 0.000 0.000 1.440 ENE 0.000 0.144-0.288 0.096 0.048 0.000 0.000 0.000 0.000 0.576 E
0.000 0.048 0.384 0.000 0.000 0.000 0.000 0.000 0.000 0.432 ESE 0.000 0.096 0.048 0.048 0.000 0.000 0.000 0.000 0.000 0.192 L
SE 0.000 0.048 0.048 0.000 0.000 0.000 0.000 0.000 0.000 0.096 SSE 0.000 0.144 0.144 0.048' O.048 0.336 0.192 0.000 0.000 0.912 S
0.000 0.096 0.432 0.480 0.240 0.144 0.048 0.000 0.000 1.440 SSW 0.000 0.384 1.632 1.920 1.008 0.480 0.000 0.000 0.000 5.425 SW 0.000 0.144 0.864 1.056 0.432 0.624 0.000 0.000 0.000 3.120 WSW O.000 0.144 0.192 0.000 0.096 0.960 0.048 0.000 0.000 1.440 W
0.000 0.000 0.000 0.144 0.144 0.336 0.000 0.000 0.000 0.624 WNW 0.000 0.000 0.096 0.240 0.240 0.240 0.000 0.000 0.000 0.816 NW 0.000 0.000 0.144 0.912 1.200 0.480 0.000 0.000 0.000 2.736 ENW 0.000 0.096 0.240 0.624 2.112 1.872 0.048 0.000 0.000 4.993 f
SUDTOTAL 0.000 1.584 7.537 9.313 8.929 9.410 0.336 0.000 0.000 37.110 I
r TOTAL NOURS OF VALID STABILITY OBSERVATIONS 2162 TOTAL NOURS OF STABILITY CLASS D 197 TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 773 TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2083 TOTAL NOURS CALM 0
t METEOROLOGICAL FACILITY:
SEQUOYAN NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS j
WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED 24-APR-96
[
MEAN WIND SPEED =
5.57 EOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS 2
+
JOITT PE"CPNTA?E FREQUETCIES OF f*I N D SPE"D KY CIED DI?ECTIVJ FC R STABILITY CLASS E
(-0.5< DELTA T(= 1.5 C/100 M)
SEQUOTAH NUCLEAR PLANT JAN 1,
96 - MAR 31, 96 UIED WIND SPEED (MPE)
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 12 0.023 0.288 0.960 1.008 0.528 0.096 0.000 0.000 0.000 2.903 CNE 0.061 0.528 2.784 1.152 0.000 0.000 0.000 0.000 0.000 4.525 CE 0.014 0.288 0.480 0.096 0.000 0.000
-0.000 0.000 0.000 0.878 ENE 0.003 0.048 0.096 0.048 0.000 0.000 0.000 0.000 0.000 0.195 E
0.002 0.000 0.096 0.000 0.000 0.000 0.000 0.000 0.000 0.098 ESE 0.001 0.000 0.048 0.048 0.000 0.000 0.000 0.000 0.000 0.097 SE 0.004 0.096 0.096 0.000 0.048 0.048 0.000 0.000 0.000 0.292 SSE 0.008 0.192 0.240 0.096 0.096 0.336 0.048 0.000 0.000 1.016 S
0.022 0.192 1.008 0.336 0.528 1.104 0.000 0.000 0.000 3.190 SSW 0.046 0.288 2.208 2.016 0.912 0.624 0.000 0.000 0.000 6.095 SW 0.021 0.144 1.008 1.968 0.528 0.096 0.000 0.000 0.000 3.766 CSW 0.007 0.000 0.384 0.144 0.096 0.192 0.048 0.000 0.000 0.871 9
0.004 0.000 0.240 0.096 0.192 0.000 0.000 0.000 0.000 0.532 CNW 0.006 0.096 0.240 0.288 0.096 0.048 0.000 0.000 0.000 0.774 Lv O.009 0.144 0.336 0.384 0.192 0.000 0.000 0.000 0.000 1.065 CNW 0.011 0.048 0.528 0.912 0.336 0.144 0.000 0.000 0.000 1.979 SUETOTAL 0.240 2.352 10.754 8.593 3.553 2.688 0.096 0.000 0.000 28.277 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2162 TOTAL HOURS OF STABILITY CLASS E 616 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 589 TOTAL ROURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2083 5
TOTAL HOURS CALM 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: 24-APR-96 4.07 HEAN WIND SPEED =
NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS 5
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STABILITT CLASS A (DELTA T(=-1.9 C/100 M) i SEQUOYAN NUCLEAR PLANT 4
APR 1,
96 - JUN 30, 96 t
1 WIND WIND SPEED (MPN)
I 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 0.143 0.238 0.619 0.000 0.000 0.000 1.000
?
NNE 0.000 0.000 0.095 0.333 0.428 0.428 0.048 0.000 0.000 1.333
+
NE 0.000 0.000 0.381 0.476 0.190 0.048 0.000 0.000 0.000 1.095 ENE 0.000 0.000 0.095 0.095 0.000 0.000 0.000 0.000 0.000 0.190 E
0.000 0.000 0.095 0.000 0.000 0.000 0.000 0.000 0.000 0.095 ESE 0.000 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.000 0.048 SE 0.000 0.000 0.095 0.095 0.000 0.000 0.000 0.000 0.000 0.190 SSE 0.000 0.000 0.048 0.143 0.143 0.238 0.000 0.000 0.000 0.571-i S
0.000 0.000 0.190 1.190 0.619 0.428 0.048 0.000 0.000 2.475 i
SSw 0.000 0.000 0.333 2.808 1.809 1.095 0.000 0.000 0.000 6.045 l
SW 0.000 0.000 0.000 0.714 0.333 0.190 0.000 0.000 0.000 1.238 WSW 0.000 0.000 0.000 0.048 0.048 0.095 0.095 0.000 0.000 0.286 w
0.000 0.000 0.048 0.000 0.000 0.190 0.095 0.000 0.000 0.333 WNw 0.000 0.000 0.000 0.000 0.143 0.143 0.000 0.000 0.000 0.286 Nw 0.000 0.000 0.000 0.000 0.048 0.000 0.000 0.000 0.000 0.048 NNw 0.000 0.000 0.000 0.030 0.G95 0.333 0.048 0.000 0.000 0.476 SUBTOTAL 0.000 0.000-1.380 6.092 4.093 3.808 0.333 0.000 0.000 15.707 TOTAL NOURS OF VALID STABILITY OBSERVATIONS 2139 TOTAL NOURS OF STABILITY CLASS A 348 TOTAL NOURS OF VALID WIND DIRECTION-WIND S PEED-STABILITY CLASS A 330 TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEFJ-STABILITY OBSERVATIONS 2101 TOTAL NOURS CALM 0
METEOROLOGICAL FACILITY:
SEQUOYAN 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: 24-JUL-96 MEAN WIND SPEED =
6.32 NOTE:
TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS B
JOIOT P E RC E!! TAG'? FT.EQUE7CIES CF WITD SPEED EY WIf*D DIRECTIO7 F O'2 STABILITY CLASS B
(~1.9< DELTA T(=-1.7 C/100 M)
SEQUOYAR NUCLEAR PLANT APR 1,
96 - JUN 30, 96 TIND 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 0.048 0.048 0.048 0.048 0.000 0.000 0.000 0.190 NNE 0.000 0.000 0.238 0.333 0.190 0.143 0.000 0.000 0.000 0.904 NE 0.000 0.000 0.333 0.190 0.048 0.000 0.000 0.000 0.000 0.571 ENE 0.000 0.000 0.095 0.095 0.000 0.a00 0.000 0.000 0.000 0.190 E
0.000 0.000 0.000 0.095 0.000 0.000 0.000 0.000 0.000 0.095 ESE 0.000 0.000 0.143 0.000 0.000 0.000 0.000 0.000 0.000 0.143 SE 0.000 0.000 0.048 0.095 0.000 0.000 0.000 0.000 0.000 0.143 SSE 0.000 0.000 0.095 0.095 0.000 0.000 0.000 0.000 0.000 0.190 S
0.000 0.000 0.286 0.286 0.143 0.190 0.000 0.000 0.000 0.904 SSW 0.000
.0.000 0.428 0.952 0.428 0.190 0.000 0.000 0.000 1.999 SW 0.000 0.000 0.000 0.666 0.143 0.000 0.000 0.000 0.000 0.809 WSW 0.000 0.000 0.000 0.000 0.000 0.095 0.000 0.000 0.000 0.095 W
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 0.048 0.095 0.000 0.000 0.000 0.143 NW 0.000 0.000 0.048 0.000 0.000 0.048 0.000 0.000 0.000 0.095 NNW 0.000 0.000 0.048 0.000 0.048 0.143 0.000 0.000 0.000 0.238 SU3 TOTAL 0.000 0.000 1.809 2.856 1.095 0.952 0.000 0.000 0.000 6.711 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2139 TOTAL HOURS OF STABILITY CLASS B 142 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS B 141 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2101 TOTAL ROURS CALM 0
METEOROLOGICAL FAC7LITY:
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: 24-JUL-96 5.05 MEAN WIND SPEED =
NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS
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JOICT PESCERTARE FREQUERCIES OF WTED SPEED OT CIRD DIRECTICQ FOR STABILITY CLASS D
(-1.5( DELTA T<=-0.5 C/100 M)
SEQUOYAN NUCLEAR PLANT APR 1,
96 - JUN 30, 96 t
CIND WIND SPEED (MPN) f 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.000 0.000 0.286 1.047 0.952 0.619 0.190 1.000 0.000 3.094
-I NNE 0.CCC O.048 0.571 1.047 0.381 0.238 0.000 0.000 0.000 2.285 I
NE 0.000 0.143 0.571 0.048 0.095 0.000 0.000-0.000 0.000 0.857
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ENE 0.000 0.095 0.235 0.048 0.000 0.000 0.000 0.000 0.000 0.381 i
E 0.000 0.095 0.190 0.030 0.000 0.000 0.000 0.000 0.000 0.286
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.000 0.000 0.000 0.000 0.000 0.286 i
SE 0.000 0.095 0.190 0.048 J.000 0.000 0.000 0.000 0.000 0.333 i
SSE 0.000 0.095 0.762 0.238 0.095 0.286 0.000 0.000 0.000 1.475 j
S 0.000 0.095 1.428 1.380 0 571 0.286 0.000 0.000 0.000 3.760 SSW
'O.000 0.095 1.333 1.904 1.047 0.857 0.000 0.000 0.000 5.236 SW 0.000 0.048 0.476 0.762 0.286 0.238 0.000 0.000 0.000 1.809 i
WSW 0.000 0.000 0.286 0.143 0.048 0.190 0.000 0.000 0.000 0.666 W
0.000 0.048 0.095 0.238 0.190 0.143 0.000 0.000 0.000 0.714 WNW 0.000 0.000 0.048 0.190 0.190 0.238 0.000 0.000 0.000 0.666 NW 0.000 0.000 0.095 0.238 0.095 0.048 0.000 0.000 0.000 0.476 l
NNW O.000 0.095 0.190 0.095 0.333 0.476 0.000 0.000 0.000 1.190
[
f SUSTOTAL 0.000 1.000 6.997 7.425 4.284 3.617 0.190 0.000 0.000 23.513 I
f TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2139 TOTAL NOURS OF STABILITY CLASS D 496
{
TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY
_AS S D 494 I
TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY 3SERVATIONS 2101 TOTAL NOURS CALM 0
r r
METEOROLOGICAL FACILITY:
SEQUOYAN NUCLEAR PLANT STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS i
WIUD SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 24-JUL-96 I
MEAN WIND SPEED =
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JOINT PERCESTACE FREQUE!!CIES OF CITD SPEED RY WI"*D DIffECTIMY FOR STABILITY CLASS E
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S EQt'OY AN NUCLEAR PLANT APR 1 96 - JUN 30, 96 UIND WIND SPEED (MPN)
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
'0.014 0.286 2.713 1.571 0.190 0.048 0.000 0.000 0.000 4.821 NNE 0.012 0.571 2.094 0.428 0.238 0.048 0.000 0.000 0.000 3.392 NE 0.003 0.381 0.333 0.143 0.000 0.000 0.000 0.000 0.000 0.860 ENE 0.001 0.143 0.048 0.048 0.000 0.000 0.000 0.000 0.000 0.239 E
0.000 0.000 0.095 0.048 0.000 0.000 0.000 0.000 0.000 0.143 ESE 0.003 0.619 0.095 0.048 0.000 0.000 0.000 0.000 0.000 0.765 SE 0.003 0.476 0.238 0.048 0.000 0.000 0.000 0.000 0.000 0.765 SSE 0.006 0.666 0.571 0.190 0.143 0.048 0.000 0.000 0.000 1.624 S
0.013 0.571 2.237 0.619 0.286 0.476 0.000 0.000 0.000 4.202 SSW 0.018 0.095 3.760 2.094 0.762 0.428 0.000 0.000 0.000 7.158 SW 0.007 0.190 1.238 0.476 0.143 0.143 0.000 0.000 0.000 2.196 WSW 0.004 0.190 0.714 0.190 0.048 0.000 0.000 0.000 0.000 1.147 W
0.002 0.048 0.333 0.095 0.143 0.095 0.000 0.000 0.000 0.716 WNW 0.001 0.000 0.143 0.143 0.000 0.048 0.000 0.000 0.000 0.334 NW 0.002 0.048 0.3?3 0.095 0.095 0.000 0.000 0.000 0.000 0.573 NNW 0.005 0.143 0.952 0.428 0.000 0.095 0.000 0.000 0.000 1.623 SUBTOTAL 0.095 4.426 15.897 6.663 2.047 1.428 0.000 0.000 0.000 30.557 TOTAL NOURS OF VALID STABILITY OBSERVATIONS 2139 TOTAL NOURS OF STABILITY CLASS E 648 TOTAL BOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 642 TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2101 TOTAL NOURS CALM 2
METEOROLOGICAL FACILITY:
SEQUOYAN 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: 24-JUL-96 MEAN WIND SPEED =
3.21 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS
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SEQUOYAN NUCLEAR PLANT.
JUL 1,
96 - SEP 30, 96 WIND SPEED (MPH)
WIND 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 0.137 0.275 0.137 0.046 0.000 0.000 0.000 0.595 NNE 0.000 0.000 0.137 1.419 0.549 0.366 0.000 0.000 0.000 2.471 NE 0.000 0.000 0.183 0.595 0.229 0.000 0.000 0.000 0.000 1.007 ENE 0.000 0.000 0.137 0.000 0.000 0.000 0.000 0.000 0.000 0.137 E
0.000 0.000 0.137 0.092 0.000 0.000 0.000 0.000 0.000 0.229 ESE 0.000 0.000 0.000 0.092 0.000 0.000 0.000 0.000 0.000 0.092 SE 0.000 0.000 0.092 0.046 0.000 0.000 0.000 0.000 0.000 0.137 SSE 0.000 0.000 0.046 0.092 0.000 0.092 0.000 0.000 0.000 0.229 3
0.000 0.000 0.046 0.229 0.092 0.000 0.000 0.000 0.000 0.366 SSW 0.000 0.000 0.092 0.961 0.320 0.000 0.000 0.000 0.000 1.373 SW 0.000 0.000 0.092 0.412 0.046 0.000 0.000 0.000 0.000 0.549 WSW 0.000 0.000 0.000 0.046 0.092 0.000 0.000 0.000 0.000 0.137 W
0.000 0.000 0.000 0.046 0.137 0.000 0.000 0.000 0.000 0.183 WNW 0.000 0.000 0.000 0.000 0.046 0.000 0.000 0.000 0.000 0.046 NW 0.000 0.000 0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.092 NNW 0.000 0.000 0.000 0.046 0.092 0.229 0.000 0.000 0.000 0.366 SUBTOTAL 0.000 0.000 1.098 4.394 1.785 0.732 0.000 0.000 0.000 8.009 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2189 175 I
TOTAL HOURS OF STABILITY CLASS A TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY class A 175 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2185 0
TOTAL HOURS CALM 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: 28-OCT-96 r
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.L JOINT PERCERTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR k
STABILITY CLASS'D
(-1.5< DELTA T(=-0.5 C/100 M)
SEQUOYAH NUCLEAR PLANT JUL 1,_96 - SEP 30, 96 t
WIND SPEED (MPH)
WIED 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 0.137 1.785 1.419 0.046 0.183 0.000 0.000 0.000 3.570
-NNE 0.000 0.000 1.602 1.831 0.458 0.092 0.000 0.000 0.000 3.982 i
NE 0.000 0.000 0.870 0.412 0.046 0.000 0.000 0.000 0.000 1.327 ENE 0.000 0.000 0.183 0.046 0.000 0.000 0.000 0.000 0.000 0.229 E
0.000 0.092 0.183 0.000 0.000 0.000 0.000 0.000 0.000 0.275 ESE O.000 0.000 0.275 0.000 0.000 0.000 0.000 0.000 0.000 0.275 SE 0.000 0.000 0.458 0.137 0.046 0i000 0.000 0.000 0.000 0.641' I
SSE 0.000 0.046 1.098 0.320 0 092 0.320 0.000 0.000 0.000 1.876 f
S 0.000 0.046 2.426 2.197 0 15$
0.778 0.000-
'O.000 0.000 5.904 SSW 0.000 0.046 2.517 1.922 0.229
'0.000 0.000 0.000 0.000 4.714 SW 0.000 0.046 0.961 0.915 0.183 0.000 0.000 0.000-0.000 2.105 WSW 0.000 0.092 0.275
-0.092 0.092 0.092 0.000 0.000 0.000 0.641
[
W 0.000 0'.137 0.046 0.183 0.092-0.000 0.000 0.000 0.000 0.458 WNW 0.000 0.092 0.275 0.137 0.000 0.000 0.000 0.000 0.000 0.503
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f NNW 0.000 0.000 0.549 0.686 0.183 0.046 0.000 0.000 0.000 1.465 SUBTOTAL 0.000 0.824 13.684 10.481 2.059 1.510 0.000 0.000 0.000 28.558 r
I TOTAL NOURS OF VALID STABILITY OBSERVATIONS 2189 628 TOTAL NOURS OF STABILITY CLASS D TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 624
{
TOTAL NOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2185
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2 0
TOTAL NOURS CALM
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METEOROLOGICAL FACILITY:
SEQUOYAH NUCLEAR PLANT l
STABILITY BASED ON DELTA-T BETWEEN 9.25 AND 45.99 METERS l
I WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED:.28-OCT-96 i
?
MEAN WIND SPEED =
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DOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS 4
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JOINT PERCE4TAGE FREOUE%CIES OF WIND SPEED BY WIUD DIRECTION FOR STABILITY CLASS E
(-0.5< DELTA T(= 1.5 C/100 M)
SEQUOYAH NUCLEAR PLANT JUL 1,
96 - SEP 30, 96 WIND SPEED (MPH)
WIND 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
0.048 1.144 7.414 1.556 0.137 0.000 0.000 0.000 0.000 10.300 NNE 0.026 1.007 3.524 0.641 0.000 0.000 0.000 0.000 0.000 5.197 NE 0.003 0.275 0.229 0.092 0.000 0.000 0.000 0.000 0.000 0.598 ENE 0.002 137 0.183 0.000 0.000 0.000 0.000 0.000 0.000 0.322 E
0.001 0 ;46 0.092 0.090 0.000 0.000 0.000 0.000 0.000 0.138 ESE 0.002 O_: 12 0.183 0.000 0.000 0.000 0.000 0.000 0.000 0.276 SE 0.004 0.4:3 0.275 0.000 0.000 0.000 0.000 0.000 0.000 0.736 SSE 0.004 0.366 0.412 0.046 0.000 0.000 0.000 0.000 0.000 0.828 5
0.011 0.732 1.190 0.320 0.183 0.092 0.000 0.000 0.000 2.528 SSW 0.020 0.458 3.112 0.870 0.137 0.000 0.000 0.000 0.000 4.597 SW 0.017 0.595 2.334 0.641 0.092 0.046 0.000 0.000 0.000 3.724 WSW 0.010 0.641 1.144 0.412 0.046 0.000 0.000 0.000 0.000 2.253 W
0.008 0.320 1.007 0.137 0.046 0.000 0.000 0.000 0.000 1.518 WNW 0.006 0.595 0.458 0.046 0.000 0.000 0.000 0.000 0.000 1.104 NW 0.005 0.366 0.595 0.137 0.046 0.000 0.000 0.000 0.000 1.150 NNW 0.017 0.686 2.288 0.183 0.000 0.000 0.000 0.000 0.000 3.175 SUBTOTAL 0.183 7.918 24.439 5.080 0.686 0.137 0.000 0.000 0.000 38.444 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2189 840 TOTAL HOURS OF STABILITY CLASS E TOTAL HOUK3 OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 840 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2185 4
TOTAL HOURS CALE METEOROLOGICAL FACILITY:
SEQUOYAH NUCLEAR PLANT STABILITY BASED 03 DELTA-T BETWEEN 9.25 AND 45.99 METERS WIND SPEED AND DIRECTION MEASURED AT 9.73 METER LEVEL DATE PRINTED: 28-OCT-96 2.37 MEAN WIND SPEED
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JOINT PERCENTAGE FREQUENCIES OF WIND SPEED BY WIND DIRECTION FOR STABILITY CLASS D
(-1.5< DELTA T<=-0.5 C/100 M)
SEQUOYAH NUCLEAR PLANT i
OCT 1,
96 - DEC 31, 96 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 0.365 1.413 1.276 0.866 0.957 0.000 0.000 0.000 4.883 NNE 0.008 0.182 2.142 1.185 1.048 1.914 0.000 0.000 0.000 6.480 NE 0.004 0.091 1.003 0.182 0.091 0.046 0.000 0.000 0.000 1.417 ENE 0.001 0.000 0.182 0.000 0.000 0.000 0.000 0.000 0.000 0.183 E
0.000 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.091 ESE 0.000 0.000 0.137 0.000 0.000 0.000 0.000 0.000 0.000 0.137 SE 0.001 0.137 0.182 0.000 0.000 0.000 0.000 0.000 0.000 0.320 SSE 0.001 0.046 0.319 0.046 0.137 0.000 0.046 0.000 0.000 0.594 S
0.003 0.091 0.684 0.273 0.547 1.003 0.091 0.000 0.000 2.692 SSW 0.004 0.228 1.094 2.142 0.912 0.410 0.000 0.000 0.000 4.790 SW 0.009 0.456 2.188 1.778 0.137 0.046 0.046 0.000 0.000 4.658 WSW 0.003 0.137 0.820 0.547 0.182 0.182 0.000 0.000 0.000 1.872 W
0.002 0.046 0.593 0.091 0.091 0.000 0.000 0.000 0.000 0.823 WNW 0.002 0.182 0.365 0.228 0.273 0.228 0.000 0.000 0.000 1.278 NW 0.001 0.000-0.182 0.729 0.547 0.046 0.000 0.000 0.000 1.505 NNW 0.002 0.182 0.319 0.228 0.547 0.365 0.000 0.000 0.000 1.642 SUBTOTAL 0.046 2.188 11.669 8.706 5.378 5.196 0.182 0.000 0.000 33.364 i
TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2201 TOTAL HOURS OF STABILITY CLASS D 735 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS D 732 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2194 TOTAL HOURS CALM 1
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: 27-JAN-97 MEAN WIND SPEED =
4.57 NOTE:
TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS 2.0~
' 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 OCT 1,
96 - DEC 31, 96 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
0.060 0.866 4.193 1.641 0.228 0.000 0.000 0.000 0.000 6.988 NNE 0.034 1.003 1.914 0.684 0.000 0.000 0.000 0.000 0.000 3.635 NE 0.008 0.547 0.137 0.000 0.000 0.000 0.000 0.000 0.000 0.692 ENE 0.001 0.046 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.092 E
0.002 0.137 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.184 ESE 0.003 0.137 0.091 0.000 0.000 0.000 0.000 0.000 0.000 0.231 SE 0.002 0.091 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.138 SSE 0.004 0.273 0.091 0.046 0.091 0.000 0.046 0.000 0.000 0.551 S
0.014 0.410 0.775 0.456 0.273 0.820 0.091 0.000 0.000 2.840 SSW 0.029 0.182 2.325 1.823 1.322 0.365 0.046 0.000 0.000 6.091 SW 0.044 0.775 2.963 1.322 0.593 0.046 0.000 0.000 0.000 5.741 WSW 0.012 0.228 0.820 0.501 0.182 0.000 0.000 0.000 0.000 1.744 W
0.008 0.365 0.319 0.091 0.046 0.046 0.000 0.000 0.000 0.874 WNW 0.012 0.273 0.729 0.091 0.000 0.091 0.000 0.000 0.000 1.197 NW 0.012 0.273 0.775 0.501 0.137 0.046 0.000 0.000 0.000 1.744 NNW 0.028 0.684 1.686 0.456 0.228 0.046 0.000 0.000 0.000 3.127 SUBTOTAL 0.273 6.290 16.955 7.612 3.099 1.459 0.182 0.000 0.000 35.871 TOTAL HOURS OF VALID STABILITY OBSERVATIONS 2201 TOTAL HOURS OF STABILITY CLASS E 788 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY CLASS E 787 TOTAL HOURS OF VALID WIND DIRECTION-WIND SPEED-STABILITY OBSERVATIONS 2194 TOTAL HOURS CALM 6
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: 27-JAN-97 MEAN WIND SPEED = 3.19 NOTE: TOTALS AND SUBTOTALS ARE OBTAINED FROM UNROUNDED NUMBERS 7.6
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