ML061230646

Estimated Dose Report for 2005, Maine Yankee Atomic Power Station

ML061230646
Person / Time
Site:	Maine Yankee
Issue date:	12/31/2005
From:	Maine Yankee Atomic Power Co
To:	Document Control Desk, NRC/FSME, Office of Nuclear Material Safety and Safeguards
References
Download: ML061230646 (22)

Text

ESTIMATED DOSE REPORT FOR 2005 MAINE YANKEE ATOMIC POWER STATION Docket No. 50-309 License No. DPR-36 Maine Yankee Atomic Power Company AREVA Doc. # 47- 9005339-000

TABLE OF CONTENTS Pap TABLE OF CONTENTS .................. i LIST OF TABLES .................. ii LIST OF FIGURES .. ................ iii

1.0 INTRODUCTION

.. 4 2.0 METEOROLOGICAL DATA.. 5 3.0 DOSE ASSESSMENT. 6 3.1 Doses from Liquid Effluents. 6 3.2 Doses from Noble Gases. 6 3.3 Doses from Tritium and Radionuclides in Particulate Form .6 3.4 Total Dose (Liquid, Gaseous and Direct External Radiation) .7

4.0 REFERENCES

.. 8

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LIST OF TABLES Page TABLE I Maximum Off-Site Doses/Dose Commitments to Members of the Public from Liquid and Gaseous Effluents for 2005 ....................................................... 9 TABLE 2 Maximum Annual Dose Commitments from Direct External Radiation, Plus Liquid and Gaseous Effluents for 2005 ....................................................... 10 TABLE 3 Usage Factors for Various Liquid Pathways ....................................................... 11 TABLES A-H Jan. 1986 - Dec. 1990, Meteorological Data Joint Frequent Distribution ................. 12

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LIST OF FIGURES FIGURE I Maine Yankee Jan. 1986 - Dec. 1990 35-Foot Wind Data ...................................... 20 FIGURE 2 Maine Yankee Jan. 1986 - Dec. 1990 197-Foot Wind Data.................................... 21

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MAINE YANKEE ATOMIC POWER STATION ESTIMATED DOSE REPORT FOR 2005

1.0 INTRODUCTION

As of mid-year, 2005, the Maine Yankee "plant" had been fully demolished, and the decommissioning of the non-Independent Spent Fuel Storage Facility (ISFSI) lands passed a final status survey for unrestricted use. Consequently, the Offsite Dose Calculation Manual (ODCM) was amended (Change 31, Reference 4) at the end of the site decommissioning activities to reflect that only the direct radiation from the Independent Spent Fuel Storage Installation remains as a potential source of radiation in the environment. In early October, 2005, the NRC notified Maine Yankee that they had accepted that the former power plant site had been successfully decommissioned in accordance with NRC procedures. As a result, the NRC amended Maine Yankee's license reducing the land under license from approximately 179 acres (former plant proper) to the 12 acre Independent Spent Fuel Storage Installation. The Independent Spent Fuel Storage Installation, and the design of the Vertical Concrete Casks (VCC's) which store the stations spent nuclear fuel, is approved by the Nuclear Regulatory Commission and considered to be leak tight as defined in ANSI N 14.5-1997.

This report summarizes the radiological dose commitments resulting from all radioactive effluent discharges during the first half 2005 prior to completion of decommissioning. The off-site doses presented by calendar quarter in Table 1were determined from primary effluent data sets, which are summarized and reported to the NRC in the Annual Radioactive Effluent Release Report for 2005.

For the purposes of demonstrating compliance with 40CFR190, "Environmental Radiation Protection Standards for Nuclear Power Operations," radiation dose estimates must include direct radiation contributions from significant plant sources. Data from available thermoluminescent dosimeters (TLDs) in the on-site area around the Independent Spent Fuel Storage Installation were evaluated for potential direct /

scatter dose contributions to members of the public off-site to determine compliance with the 40CFR 190 dose limits.

Dose commitments from the discharge of radioactive liquid (no recorded gaseous effluents for the report period) were estimated in accordance with the "Maine Yankee Atomic Power Station Off-Site Dose Calculation Manual" (ODCM), and are reported herein as required by ODCM Appendix C.3 (Reference 1).

These dose estimates were developed using a "Method II" analysis as described in the ODCM. The Method II analysis incorporates the methodology of Regulatory Guide 1.109 (Reference 2).

All calculated pathway doses for this reporting period are well below the dose criteria of 10CFR50, Appendix I, and the dose limits for effluent releases stated in the Maine Yankee ODCM. In addition, the total dose to the most limiting member of the public due to the combined exposure to plant-related direct radiation and site effluents was below the dose standards of 40CFR190.

2.0 METEOROLOGICAL DATA With the permanent shutdown of the plant in 1997 and subsequent decommissioning process of Maine Yankee, the generation of gaseous fission and activation products and operation of the batch gas process system ended prior to this reporting period. The site's meteorological tower was taken out of service in 2000. The tower instrumentation had been designed to meet the requirements of Regulatory Guide 1.23 (Reference 3) for meteorological monitoring.

In accordance with A.3 of the Maine Yankee Offsite Dose Calculation Manual (ODCM), historical meteorological data collected from the site's former 200-foot meteorological tower are provided in Tables A through H. This historical data is presented in the form of cumulative joint frequency distributions for wind speed, direction, and stability class for the calendar years 1986 -1990 Wind rose patterns for all stability classes for the same period are illustrated on Figures I and 2.

There were no recorded site gaseous or airborne effluents for the report period requiring application of airborne dispersion and deposition estimates.

3.0 DOSE ASSESSMENT 3.1 Doses from Liquid Effluents ODCM Section 2.1.4 limits total body and organ doses from liquid effluents to members of the public in unrestricted areas to those values specified in I0CFR Part 50, Appendix I. The limit for total body dose is 1.5 mrem per calendar quarter, and 3 mrem per calendar year. The limit for organ doses is 5 mrem per calendar quarter and 10 mrem per calendar year. By implementing the requirements of 10CFR Part 50, Appendix I, ODCM Section 2.1.4 assures that the release of radioactive material in liquid effluents will be kept "as low as is reasonably achievable."

Potential exposure pathways associated with liquid effluents from Maine Yankee are ingestion of fish/shellfish and direct exposure from shoreline sedimentation. The drinking water and irrigation pathways do not exist due to the saltwater nature of the receiving water estuary.

The calculated doses from liquid effluents incorporate near-field mixing in an area of the estuary (approximately 13 acres) originally credited to the plant's effluent releases for doses due to ingestion of fish, shellfish, and shoreline exposures. Table 3 lists the usage factors by age group and pathway that were applied to liquid effluent.

The whole body and organ doses resulting from liquid effluent discharges are the summations of dose contributions via all active exposure pathways for each release during the reporting period. Table I presents the maximum whole body and organ doses from liquid effluents to a member of the public. The estimated quarterly and annual doses resulting from liquid effluent discharges are well below the IOCFR50, Appendix I dose criteria.

3.2 Doses from Noble Gases During the time of effluent releases prior to this reporting period (2005), the ODCM limited the gamma air dose and beta air dose from noble gases released in gaseous effluents from the site to areas at and beyond the site boundary to those values specified in IOCFR50, Appendix I. The limit for gamma air doses was 5 mrad per calendar quarter and 10 mrad per year. The limit for beta air doses was 10 mrad per calendar quarter and 20 mrad per year. By implementing the requirements of IOCFR50, Appendix L the releases of radioactive noble gases in gaseous effluents had been kept "as low as is reasonably achievable."

During the first half of 2005 the plant site was in the final stages of decommissioning. All sources of noble gas effluents had been eliminated prior to the start of 2005. Therefore, there were no noble gases released from the site to the environment in this reporting period and as a result, no calculated dose impact.

3.3 Doses from Tritium and Radionuclides in Particulate Form During the time of effluent releases prior to this reporting period (2005), the ODCM implemented the limits on organ doses established in 10CFR50 Appendix I, which assured that the releases of iodines, tritium and particulates in gaseous effluent had been kept "as low as is reasonably achievable." Organ doses to individuals located at or beyond the site boundary as a result of tritium and particulate-form radionuclides (with half-lives greater than 8 days) in gaseous effluent were limited to 7.5 mrem per quarter and 15 mrem per year doses.

As with noble gases, all measurable sources of airborne tritium and particulate radioactivity had been eliminated prior to the start of the reporting period. Therefore, there were no recorded airborne tritium and particulate radioactivity released from the site to the environment in 2005 up to the time of completion of the decommissioning process, and as a result, no calculated dose impact.

3.4 Total Dose (Liquid, Gaseous and Direct External Radiation)

The annual (calendar year) total dose or dose commitment to any member of the public due to releases of radioactivity and direct radiation from fixed sources are limited to the EPA's radiation protection standards for the uranium fuel cycle (40CFR190). The dose limits are set to less than or equal to 25 mrem per year to the total body or any organ, except the thyroid, which is limited to less than or equal to 75 mrem per year.

Direct external dose from fixed sources of radioactive materials on-site were estimated from Maine Yankee's 2005 environmental TLD data. In prior years when there were fixed radiation sources associated with the plant, TLD data around the site indicated that members of the public on mud flats in Bailey's Cove could receive a small dose that needed to be accounted for. With the plant site in the final stages of remediation and decommissioning in 2005, all significant sources of fixed radiation on the plant proper had been removed, thereby eliminating direct dose impacts on the mudflats.

For the ISFSI, a series of TLDs have been located on-site in each of the sixteen compass sectors within 340 meters of the center of the facility. An assessment of the ISFSI quarterly TLD data trends from before any radioactive materials were placed into storage, through the fourteen month transfer period of materials onto the ISFSI, and following completion of all transfers, including the first half of 2005, was performed. Most of the TLD locations indicate little or no significant change in exposure rate from the pre-operational period to the current period in 2005. However, three on-site locations do appear to reflect some increase from the pre-operational conditions. Two of these locations are bordered by a water boundary (Back River) to the ISFSI site area. The third location is well within the site property and is the closest environmental TLD to the storage pad in any of the sixteen sectors. All three locations are at about half the distance or less to the ISFSI as the nearest property line bordered by land. None of the three locations are near a site property line which could be occupied by members of the public on a continuous basis. The closest site boundary bordered by land to the ISFSI is about 1100 feet from the center of the facility in the NE and ENE sectors, with the nearest real resident approximately twice this distance. The TLD history for the closest land site boundaries did not show any significant change in exposure rate from the pre-operational period through the full ISFSI configuration into 2005. With no changes in the configuration of the full ISFSI until such time that materials are shipped from the site, it is not anticipated that any change in the current trends of TLD response will be observed. Therefore, it is concluded that there is no measurable or significant direct dose to any offsite member of the public from the ISFSI in 2005.

Table 2 lists the dose contribution from each component (direct, liquid and gas) to the total body, maximum organ, and thyroid for the hypothetical limiting member of the public located on the nearest site boundary to the ISFSI pad.

4.0 REFERENCES

1. "Off-Site Dose Calculation Manual," Maine Yankee Atomic Power Company, Change No. 29, Approved 07/21/04.

2. Regulatory Guide 1.109, "Calculation of Annual Doses to Man from Routine Release of Reactor Effluents for the Purpose of Evaluating Compliance With 10CFR50, Appendix I," U.S. Nuclear Regulatory Commission, Office of Standards Development, Revision 1, October 1977.

3. Regulatory Guide 1.23, "On-Site Meteorological Programs (Safety Guide 23)," U.S. Nuclear Regulatory Commission, Office of Standards Development, February 1972.

4. "Off-Site Dose Calculation Manual," Maine Yankee Atomic Power Company, Change No. 31, Approved 08/31/05.

TABLE 1 Maine Yankee Atomic Power Station Maximum Off-Site Doses/Dose Commitments to Members of the Public from Liquid and Gaseous Effluents for 2005 (10CFR50, Appendix I)

I Dose (mrern) 1st 1 2nd 3rd 4th J Source Quarter Quarter lQuarter Quarter Year~b)

Liquid Effluents L -_ -

Total Body Dose(a) 2.2E-04 2.1E-05 ND ND 2.4E-04 Footnotes (1) (1) 1 I___ ---

Organ Dose(') 4.8E-04 4.OE-05 ND ND 5.2E-04 Footnotes (2) (2)

Airborne Effluents - - - _

Organ Dose(a) (Tritium + Patn.) ND ND ND ND ND Footnotes

________________-- _______N oble G ases i ___

Beta Airla) (mrad) ND ND ND ND ND Footnotes Gamma Air() (mrad) ND ND ND ND ND Footnotes ND: No dose determined based on no recorded effluents. With the completion of decommissioning of the former plant site in June, 2005, the ODCM was amended (Change 31, Reference 4) to eliminate the liquid effluent pathways from the need for consideration. Consideration of gaseous effluent pathways had been removed from the ODCM per Change 29 (Reference 1).

(a) The numbered footnotes indicate the age group, organ, and location of the dose receptor, where appropriate.

(1) Adult (2) Adult/GI-LLI (b) "Maximum" dose for the year is the sum of the maximum doses for each quarter. This results in a conservative yearly dose estimate, but still well within the limits of 10CFR 50, Appendix 1.

TABLE 2 Maine Yankee Atomic Power Station Maximum Annual Dose Commitments from Direct External Radiation, Plus Liquid and Gaseous Effluents for 2005(a)

(40CFR190)

Pathway Total Body f Maximum Organ Thyroid (mrem)

(mrem) (mrem)

Direct External 0 0 0 Liquids 2.4E-04 5.2E-04 1.7E-04 Gases 0 0 0 Annual Total (b) 2.413-04 5.2E-04 1.713-04 (a) The maximum individual doses from site effluents and direct radiation from fixed is controlled by liquid effluents recorded for the reporting period.

(b) For any member of the public, EPA radiation protection standards (40CFR190) established annual dose limits of 25 mrem to the total body and any organ (except the thyroid, which has a dose limit of 75 mrem).

TABLE 3 Usage Factors for Various Liquid Pathways at Maine Yankee (From Regulatory Guide 1.109, Table E-5, except as noted.

Zero where no pathway exists.)

(a) Regional shoreline use associated with mud flats - Maine Yankee Atomic Power Station Environmental Report, Supplement Number One, Volume 1, Section 5.2.2, Maine Yankee Atomic Power Company.

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TABLE A MAINE YANKEE JAN86-DEC90 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 35.0 FT WIND DATA STABILITY CLASS A CLASS FREQUENCY (PERCENT) . 3.40 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW W(SW W WNW NW NNW VRBL TOTAL KPH CALM 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 C-3 6 6 16 26 19 8 11 13 10 3 10 1 2 0 2 1 0 134 (1) .44 .44 1.18 1.92 1.40 .59 .81 .96 .74 .22 .74 .07 .15 .00 .15 .07 .00 9.88 (2) .02 .02 .04 .07 .05 .02 .03 .03 .03 .01 .03 .00 .01 .00 .01 .00 .00 .34 4-7 31 32 64 36 13 2 11 37 125 70 16 21 20 10 18 17 0 523 (1) 2.29 2.36 4.72 2.65 .96 .15 .81 2.73 9.22 5.16 1.18 1.55 1.47 .74 1.33 1.25 .00 38.57

42) .08 .08 .16 .09 .03 .01 .03 .09 .31 .18 .04 .05 .05 .03 .05 .04 .00 1.31 8-12 33 1S 23 2 1 0 0 9 41 96 18 12 26 29 56 63 0 424 (1) 2.43 1.11 1.70 .15 .07 .00 .00 .66 3.02 7.08 1.33 .88 1.92 2.14 4.13 4.65 .00 31.27 (2) .08 .04 .06 .01 .00 .00 .00 .02 .10 .24 .05 .03 .07 .07 .14 .16 .00 1.06 13-18 16 6 3 0 1 0 0 0 3 13 1 6 3 25 98 56 0 231 (1) 1.18 .44 .22 .00 .07 .00 .00 .00 .22 .96 .07 .44 .22 1.84 7.23 4.13 .00 17.04 (2) .04 .02 .01 .00 .00 .00 .00 .00 .01 .03 .00 .02 .01 .06 .25 .14 .00 .58 19-24 4 0 0 0 0 0 0 0 0 0 0 0 0 2 28 9 0 43 (1) .29 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .15 2.06 .66 .00 3.17 (2) .01 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .07 .02 .00 .11 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .07 .00 .00 .07 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 ALL SPEEDS 90 59 106 64 34 10 22 59 179 182 45 40 51 66 203 146 0 1356 (1) 6.64 4.35 7.82 4.72 2.51 .74 1.62 4.35 13.20 13.42 3.32 2.95 3.76 4.87 14.97 10.77 .00 100.00 (2) .23 .15 .27 .16 .09 .03 .06 .15 .45 .46 .11 .10 .13 .17 .51 .37 .00 3.40 (1)-PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)-PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C- CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPN)

TABLE B MAINE YANKEE JAN86-DEC90 NETEOROLOGrCAL DATA JOINT FREQUENCY DISTRIBUTION 35.0 FT WIND DATA STABILITY CLASS B CLASS FREQUENCY (PERCENT) - 1.44 WIND DIRECTION FROM SPEED N NME NE ENE E ESE SE SSE S SSW SW WSW W WNW NW MUW VRBL TOTAL MPH CALM 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 C-3 1 2 2 6 5 1 3 5 4 1 1 2 0 2 1 2 0 38 (1) .17 .35 .35 1.05 .87 .17 .52 .87 .70 .17 .17 .35 .00 .35 .17 .35 .00 6.63 (2) .00 .01 .01 .02 .01 .00 .01 .01 .01 .00 .00 .01 .00 .01 .00 .01 .00 .10 4-7 6 14 20 1S 6 5 5 19 48 27 8 5 7 8 7 10 0 210 (1) 1.05 2.44 3.49 2.62 1.05 .87 .87 3.32 8.38 4.71 1.40 .87 1.22 1.40 1.22 1.75 .00 36.65 (2) .02 .04 .05 .04 .02 .01 .01 .05 .12 .07 .02 .01 .02 .02 .02 .03 .00 .53 8-12 10 8 10 2 1 0 0 7 18 36 10 5 13 18 25 30 0 193 (1) 1.75 1.40 1.75 .35 .17 .00 .00 1.22 3.14 6.28 1.75 .87 2.27 3.14 4.36 5.24 .00 33.68 (2) .03 .02 .03 .01 .00 .00 .00 .02 .05 .09 .03 .01 .03 .05 .06 .08 .00 .48 13-18 4 2 5 1 0 0 0 0 4 7 2 4 7 14 36 18 0 104 (1) .70 .35 .87 .17 .00 .00 .00 .00 .70 1.22 .35 .70 1.22 2.44 6.28 3.14 .00 18.15 (2) .01 .01 .01 .00 .00 .00 .00 .00 .01 .02 .01 .01 .02 .04 .09 .05 .00 .26 19-24 5 0 0 0 0 0 0 1 0 0 0 0 1 3 10 5 0 25 (1) .87 .00 .00 .00 .00 .00 .00 .17 .00 .00 .00 .00 .17 .52 1.75 .87 .00 4.36 (2) .01 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .03 .01 .00 .06 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 3

41) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .52 .00 .52 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .00 .01 ALL SPEEDS 26 26 37 24 12 6 8 32 74 71 21 16 28 45 79 68 0 573

41) 4.54 4.54 6.46 4.19 2.09 1.05 1.40 5.58 12.91 12.39 3.66 2.79 4.89 7.85 13.79 11.87 .00 100.00

42) .07 .07 .09 .06 .03 .02 .02 .08 .19 .18 .05 .04 .07 .11 .20 .17 .00 1.44 (1)-PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)-PERCENT OF ALL GOODOBSERVATIONS FOR THIS PERIOD C- CAIN (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)

TABLE C MAINE YANKEE JAN86-DEC90 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 35.0 PT WIND DATA STABILITY CLASS C CLASS PREQUENCY (PERCENT) - 4.24 SIND DIRECTION FROM SPEED N NNE NE ENE e ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 C-3 5 9 11 11 11 6 10 11 13 8 5 3 3 2 1 4 0 113 (1) .30 .53 .65 .65 .65 .35 .59 .65 .77 .47 .30 .18 .18 .12 .06 .24 .00 6.67 (2) .01 .02 .03 .03 .03 .02 .03 .03 .03 .02 .01 .01 .01 .01 .00 .01 .00 .28 4-7 34 42 54 29 12 8 21 41 128 72 28 20 22 18 27 45 0 601 (1) 2.01 2.48 3.19 1.71 .71 .47 1.24 2.42 7.56 4.25 1.65 1.18 1.30 1.06 1.59 2.66 .00 35.50 (2) .09 .11 .14 .07 .03 .02 .05 .10 .32 .18 .07 .05 .06 .05 .07 .11 .00 1.51 8-12 47 41 26 6 4 3 4 16 47 85 28 15 28 61 91 75 0 577 (1) 2.78 2.42 1.54 .35 .24 .18 .24 .95 2.78 5.02 1.65 .89 1.65 3.60 5.38 4.43 .00 34.08 (2) .12 .10 .07 .02 .01 .01 .01 .04 .12 .21 .07 .04 .07 .15 .23 .19 .00 1.45 13-18 25 10 3 0 0 0 0 2 5 12 1 5 16 43 119 56 0 297 (1) 1.48 .59 .18 .00 .00 .00 .00 .12 .30 .71 .06 .30 .95 2.54 7.03 3.31 .00 17.54 (2) .06 .03 .01 .00 .00 .00 .00 .01 .01 .03 .00 .01 .04 .11 .30 .14 .00 .74 19-24 2 2 0 0 0 0 0 0 0 1 0 0 0 10 60 17 0 92 (1) .12 .12 .00 .00 .00 .00 .00 .00 .00 .06 .00 .00 .00 .59 3.54 1.00 .00 5.43 (2) .01 .01 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .03 .15 .04 .00 .23 CT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 4 8 1 0 13 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .24 .47 .06 .00 .77 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .02 .00 .00 .03 ALL SPEEDS 113 104 94 46 27 17 35 70 193 178 62 43 69 138 306 198 0 1693 (1) 6.67 6.14 5.55 2.72 1.59 1.00 2.07 4.13 11.40 10.51 3.66 2.54 4.08 8.15 18.07 11.70 .00 100.00 (2) .28 .26 .24 .12 .07 .04 .09 .18 .48 .45 .16 .11 .17 .35 .77 .50 .00 4.24 (I)-PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)-PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C- CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)

TABLE D MAINE YANKEE JAN86-DEC90 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 35.0 FT WIND DATA STABILITY CLASS D CLASS FREQUENCY (PERCENT) - 44.72 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW l WNW NW NNW VRBL TOTAL MPN CALM 0 0 0 1 1 1 0 0 2 0 0 1 2 2 4 0 0 14 (1) .00 .00 .00 .01 .01 .01 .00 .00 .01 .00 .00 .01 .01 .01 .02 .00 .00 .08 (2) .00 .00 .00 .00 .00 .00 .00 .00 .01 .00 .00 .00 .01 .01 .01 .00 .00 .04 C-3 119 97 148 179 218 200 211 266 219 108 113 97 105 92 102 109 0 2383 (1) .67 .54 .83 1.00 1.22 1.12 1.18 1.49 1.23 .61 .63 .54 .59 .52 .57 .61 .00 13.35 (2) .30 .24 .37 .45 .55 .50 .53 .67 .55 .27 .28 .24 .26 .23 .26 .27 .00 5.97 4-7 524 497 481 351 234 279 356 739 968 642 469 305 240 228 267 391 0 6971 (2) 2.94 2.79 2.70 1.97 1.31 1.56 2.00 4.14 5.42 3.60 2.63 1.71 1.34 1.28 1.50 2.19 .00 39.07 (2) 1.31 1.25 1.21 .88 .59 .70 .89 1.85 2.43 1.61 1.18 .76 .60 .57 .67 .98 .00 17.47 8-12 542 445 255 110 122 129 163 400 653 618 325 150 164 429 705 530 0 5740 (1U 3.04 2.49 1.43 .62 .68 .72 .91 2.24 3.66 3.46 1.82 .84 .92 2.40 3.95 2.97 .00 32.17 (2) 1.36 1.12 .64 .28 .31 .32 .41 1.00 1.64 1.55 .81 .38 .41 1.08 1.77 1.33 .00 14.38 13-18 179 87 33 19 36 33 25 106 244 104 57 23 33 245 726 318 0 2268 (1) 1.00 .49 .18 .11 .20 .18 .14 .59 1.37 .58 .32 .13 .18 1.37 4.07 1.78 .00 12.71 (2) .45 .22 .08 .05 .09 .08 .06 .27 .61 .26 .14 .06 .08 .61 1.82 .80 .00 5.68 19-24 18 3 1 1 5 3 2 11 32 6 1 2 2 52 225 64 0 428 (1) .10 .02 .01 .01 .03 .02 .01 .06 .18 .03 .01 .01 .01 .29 1.26 .36 .00 2.40 (2) .05 .01 .00 .00 .01 .01 .01 .03 .08 .02 .00 .01 .01 .13 .56 .16 .00 1.07 GT 24 0 0 0 0 2 0 0 1 2 0 0 0 0 3 25 7 0 40

41) .00 .00 .00 .00 .01 .00 .00 .01 .01 .00 .00 .00 .00 .02 .14 .04 .00 .22 (2) .00 .00 .00 .00 .01 .00 .00 .00 .01 .00 .00 .00 .00 .01 .06 .02 .00 .10 ALL SPEEDS 1382 1129 918 661 618 645 757 1523 2120 1478 965 578 546 1051 2054 1419 0 17844

41) 7.74 6.33 5.14 3.70 3.46 3.61 4.24 8.54 11.88 8.28 5.41 3.24 3.06 5.89 11.51 7.95 .00 100.00 (2) 3.46 2.83 2.30 1.66 1.55 1.62 1.90 3.82 5.31 3.70 2.42 1.45 1.37 2.63 5.15 3.56 .00 44.72 (1) -PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE

42) PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C- CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)

TABLE E MAINE YANKEE JAN86-DEC90 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 35.0 FT WIND DATA STABILITY CLASS E CLASS FREQUENCY (PERCENT) - 28.88 WIND DIRECTION FRON SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALMt 7 8 1 2 4 3 4 2 2 2 3 5 7 3 5 7 0 65 (t1 .06 .07 .01 .02 .03 .03 .03 .02 .02 .02 .03 .04 .06 .03 .04 .06 .00 .56 (2) .02 .02 .00 .01 .01 .01 .01 .01 .01 .01 .01 .01 .02 .01 .01 .02 .00 .16 C-3 246 215 204 146 162 153 331 497 402 295 258 273 230 234 264 311 0 4221 (1) 2.13 1.87 1.77 1.27 1.41 1.33 2.87 4.31 3.49 2.56 2.24 2.37 2.00 2.03 2.29 2.70 .00 36.62 (2) .62 .54 .51 .37 .41 .38 .83 1.25 1.01 .74 .65 .68 .58 .59 .66 .78 .00 10.58 4-7 465 281 152 52 28 66 147 463 648 618 309 283 236 342 453 484 0 5027 (1) 4.03 2.44 1.32 .45 .24 .57 1.28 4.02 5.62 5.36 2.68 2.46 2.05 2.97 3.93 4.20 .00 43.61 (2) 1.17 .70 .38 .13 .07 .17 .37 1.16 1.62 1.55 .77 .71 .59 .86 1.14 1.21 .00 12.60 8-12 110 66 22 7 4 13 30 117 230 271 75 30 42 140 313 167 0 1637 (1) .95 .57 .19 .06 .03 .11 .26 1.02 2.00 2.35 .65 .26 .36 1.21 2.72 1.45 .00 14.20 (2) .28 .17 .06 .02 .01 .03 .08 .29 .58 .68 .19 .08 .11 .35 .78 .42 .00 4.10 13-18 26 15 0 0 5 14 19 54 96 41 7 1 6 39 92 19 0 434

41) .23 .13 .00 .00 .04 .12 .16 .47 .83 .36 .06 .01 .05 .34 .80 .16 .00 3.77 (2) .07 .04 .00 .00 .01 .04 .05 .14 .24 .10 .02 .00 .02 .10 .23 .05 .00 1.09 19-24 2 1 0 0 1 6 15 24 28 4 0 0 1 6 26 0 0 114 (1) .02 .01 .00 .00 .01 .05 .13 .21 .24 .03 .00 .00 .01 .05 .23 .00 .00 .99 (2) .01 .00 .00 .00 .00 .02 .04 .06 .07 .01 .00 .00 .00 .02 .07 .00 .00 .29 CT 24 0 0 0 0 0 0 7 14 6 0 0 0 0 0 1 0 0 28 (1) .00 .00 .00 .00 .00 .00 .06 .12 .05 .00 .00 .00 .00 .00 .01 .00 .00 .24 (2) .00 .00 .00 .00 .00 .00 .02 .04 .02 .00 .00 .00 .00 .00 .00 .00 .00 .07 ALL SPEEDS 856 586 379 207 204 255 553 1171 1412 1231 652 592 522 764 1154 988 0 11526 (1) 7.43 5.08 3.29 1.80 1.77 2.21 4.80 10.16 12.25 10.68 5.66 5.14 4.53 6.63 10.01 8.57 .00 100.00 (2) 2.15 1.47 .95 .52 .51 .64 1.39 2.93 3.54 3.08 1.63 1.48 1.31 1.91 2.89 2.48 .00 28.88 t1)-PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)-PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C- CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MMP)

TABLE F MAINE YANKEE JAN86-DEC90 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 35.0 FT WIND DATA STABILITY CLASS F CLASS FREQUENCY (PERCENT) - 9.10 WIND DIRECTION FROM SPEED N NNE NE ENE S ESE SE SSE S SSW SW WSW N WNW NW NNW VRBL TOTAL mPm CALM 6 8 9 5 5 3 1 6 3 6 6- 7 11 13 8 7 0 104 (1) .17 .22 .25 .14 .14 .08 .03 .17 .08 .17 .17 .19 .30 .36 .22 .19 .00 2.86

12) .02 .02 .02 .01 .01 .01 .00 .02 .01 .02 .02 .02 .03 .03 .02 .02 .00 .26 C-3 188 151 158 135 89 78 127 184 166 161 113 127 182 194 305 289 0 2647 (1) 5.18 4.16 4.35 3.72 2.45 2.15 3.50 5.07 4.57 4.43 3.11 3.50 5.01 5.34 8.40 7.96 .00 72.90 (2) .47 .38 .40 .34 .22 .20 .32 .46 .42 .40 .28 .32 .46 .49 .76 .72 .00 6.63 4-7 111 45 20 4 0 1 5 22 53 43 22 50 49 72 134 197 0 828 (1) 3.06 1.24 .55 .11 .00 .03 .14 .61 1.46 1.18 .61 1.38 1.35 1.98 3.69 5.43 .00 22.80 (2) .28 .11 .05 .01 .00 .00 .01 .06 .13 .11 .06 .13 .12 .18 .34 .49 .00 2.07 8-12 3 0 1 0 0 1 1 8 3 4 3 2 3 4 15 3 0 51

41) .08 .00 .03 .00 .00 .03 .03 .22 .08 .11 .08 .06 .08 .11 .41 .08 .00 1.40 (2) .01 .00 .00 .00 .00 .00 .00 .02 .01 .01 .01 .01 .01 .01 .04 .01 .00 .13 13-18 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 tl) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 19-24 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .03 .00 .00 .00 .03 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 ALL SPEEDS 308 204 188 144 94 83 134 220 225 214 144 186 245 284 462 496 0 3631 (1) 8.48 5.62 5.18 3.97 2.59 2.29 3.69 6.06 6.20 5.89 3.97 5.12 6.75 7.82 12.72 13.66 .00 100.00 (2) .77 .51 .47 .36 .24 .21 .34 .55 .56 .54 .36 .47 .61 .71 1.16 1.24 .00 9.10 (1) -PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)-PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C- CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)

TABLE G MAINE YANKEE JAN86-DEC90 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBUTION 35.0 PT WIND DATA STABILITY CLASS G CLASS FREQPJUCY {PERCENT) - 8.22 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W mNW NW hNW VRBL TOTAL MPH CALM 17 13 15 12 7 3 6 2 5 8 5 7 11 11 12 9 0 143 (1) .52 .40 .46 .37 .21 .09 .18 .06 .15 .24 .15 .21 .34 .34 .37 .27 .00 4.36 (2) .04 .03 .04 .03 .02 .01 .02 .01 .01 .02 .01 .02 .03 .03 .03 .02 .00 .36 C-3 295 257 245 151 65 37 39 45 62 54 60 69 104 158 467 543 0 2651 (1) 8.99 7.83 7.46 4.60 1.98 1.13 1.19 1.37 1.89 1.65 1.83 2.10 3.17 4.81 14.23 16.54 .00 80.77 (2) .74 .64 .61 .38 .16 .09 .10 .11 .16 .14 .15 .17 .26 .40 1.17 1.36 .00 6.64 4-7 26 13 21 7 2 2 0 2 6 8 5 7 14 30 167 175 0 485 (1) .79 .40 .64 .21 .06 .06 .00 .06 .18 .24 .15 .21 .43 .91 5.09 5.33 .00 14.78 (2) .07 .03 .05 .02 .01 .01 .00 .01 .02 .02 .01 .02 .04 .08 .42 .44 .00 1.22 8-12 1 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 3 (1) .03 .00 .00 .00 .00 .00 .03 .00 .00 .00 .00 .00 .00 .00 .03 .00 .00 .09 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 13-18 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 19-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 ALL SPEEDS 339 283 281 170 74 42 46 49 73 70 70 83 129 199 647 727 0 3282 (1) 10.33 8.62 8.56 5.18 2.25 1.28 1.40 1.49 2.22 2.13 2.13 2.53 3.93 6.06 19.71 22.15 .00 100.00 (2) .85 .71 .70 .43 .19 .11 .12 .12 .18 .18 .18 .21 .32 .50 1.62 1.82 .00 8.22 (1) =PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2)-PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C- CALM (WIND SPEED LESS THAN OR EQUAL TO .95 KPH)

TABLE H MAINE YANKEE JAN86-DEC90 METEOROLOGICAL DATA JOINT FREQUENCY DISTRIBt7IION 35.0 FT WIND DATA STABILITY CLASS ALL CLASS FREQUENCY (PERCENT) - 100.00 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW N WmW NW NNW VRBL TOTAL mH CALM 30 29 25 20 17 10 11 10 12 16 14 20 31 29 29 23 0 326 (1) .08 .07 .06 .05 .04 .03 .03 .03 .03 .04 .04 .05 .08 .07 .07 .06 .00 .82 (2) .08 .07 .06 .05 .04 .03 .03 .03 .03 .04 .04 .05 .08 .07 .07 .06 .00 .82 C-3 860 737 784 654 569 483 732 1021 876 630 560 572 626 682 1142 1259 0 12187 (1) 2.16 1.85 1.96 1.64 1.43 1.21 1.83 2.56 2.20 1.58 1.40 1.43 1.57 1.71 2.86 3.15 .00 30.54 (2) 2.16 1.85 1.96 1.64 1.43 1.21 1.83 2.56 2.20 1.58 1.40 1.43 1.57 1.71 2.86 3.15 .00 30.54 4-7 1197 924 812 494 295 363 545 1323 1976 1480 857 691 588 708 1073 1319 0 14645 (1) 3.00 2.32 2.03 1.24 .74 .91 1.37 3.32 4.95 3.71 2.15 1.73 1.47 1.77 2.69 3.31 .00 36.70 (2) 3.00 2.32 2.03 1.24 .74 .91 1.37 3.32 4.95 3.71 2.15 1.73 1.47 1.77 2.69 3.31 .00 36.70 8-12 746 575 337 127 132 146 199 557 992 1110 459 214 276 681 1206 868 0 8625 (1) 1.87 1.44 .84 .32 .33 .37 .50 1.40 2.49 2.78 1.15 .54 .69 1.71 3.02 2.18 .00 21.61 (2) 1.87 1.44 .84 .32 .33 .37 .50 1.40 2.49 2.78 1.15 .54 .69 1.71 3.02 2.18 .00 21.61 13-18 250 120 44 20 42 47 44 162 352 177 68 39 65 366 1071 467 0 3334.

(1) .63 .30 .11 .05 .11 .12 .11 .41 .88 .44 .17 .10 .16 .92 2.68 1.17 .00 8.35 (23 .63 .30 .11 .05 .11 .12 .11 .41 .88 .44 .17 .10 .16 .92 2.68 1.17 .00 8.35 19-24 31 6 1 1 6 9 17 36 60 11 1 2 4 74 349 95 0 703 (1) .08 .02 .00 .00 .02 .02 .04 .09 .15 .03 .00 .01 .01 .19 .87 .24 .00 1.76 (2) .08 .02 .00 .00 .02 .02 .04 .09 .15 .03 .00 .01 .01 .19 .87 .24 .00 1.76 GT 24 0 0 0 0 2 0 7 15 8 0 0 0 0 7 35 11 0 85 (1) .00 .00 .00 .00 .01 .00 .02 .04 .02 .00 .00 .00 .00 .02 .09 .03 .00 .21 (2) .00 .00 .00 .00 .01 .00 .02 .04 .02 .00 .00 .00 .00 .02 .09 .03 .00 .21 ALL SPEEDS 3114 2391 2003 1316 1063 1058 1555 3124 4276 3424 1959 1538 1590 2547 4905 4042 0 39905 (1) 7.80 5.99 5.02 3.30 2.66 2.65 3.90 7.83 10.72 8.58 4.91 3.85 3.98 6.38 12.29 10.13 .00 100.00

42) 7.80 5.99 5.02 3.30 2.66 2.65 3.90 7.83 10.72 8.58 4.91 3.85 3.98 6.38 12.29 10.13 .00 100.00 (1-PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PAGE (2).PERCENT OF ALL GOOD OBSERVATIONS FOR THIS PERIOD C- CALM (WIND SPEED LESS THAN OR EQUAL TO .95 MPH)

_19-

FIGURE 1 MAINE YANKEE JAN 1986-DEC 1990 35-FOOT WIND DATA N

W E S

STABiUTY CLASS ALL CALM WINDS 0.82% WIND SPEED (MPH)

NOTE: Frequencies Indicate dirction from which the wind Is blowing.

C-3 4-7 6-12 13-18 19-24 GT24 FIGURE 2 MAINE YANKEE JAN 1986-DEC 1990 197-FOOT WIND DATA N

W E S

STABILITY CLASS ALL CALM WINDS 0.13% WIND SPEED (MPH) 0>--

NOTE: Frequencies Indicate direction from which flhe wind Is blowing.

C-3 4-7 8-12 13-18 19-24 GT24