ML101310304

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Effluent Release Data as Required by Regulatory Guide 1.21, Enclosure 1 to SBK-L-10083
ML101310304
Person / Time
Site: Seabrook NextEra Energy icon.png
Issue date: 04/30/2010
From:
NextEra Energy Seabrook
To:
Office of Nuclear Reactor Regulation
References
RG-1.021, SBK-L-10083
Download: ML101310304 (54)
v • d • e


Text

ENCLOSURE 1 TO SBK-L-10083 Effluent Release Data as Required by Regulatory Guide 1.21

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT Supplemental Information 2009 Facility: Seabrook Station Unit 1 Licensee: NextEra Energy Seabrook, LLC

1. Regulatory Limits A. Gaseous Effluents
a. 5.0 mrad per quarter gamma air dose.
b. 10.0 mrad per quarter beta air dose.
c. 7.5 mrem per quarter to any organ.

B. Liquid Effluents

a. 1.5 mrem per quartertotal body.
b. 5.0 mrem per quarter any organ.
c. 2.OE-04 p.Ci/ml dissolved or entrained gas.
2. Effluent Concentration Limits Provide the ECL's used in determining allowable release rates or concentrations.
a. Fission and activation gases: 10 ECL
b. Iodines: 10 ECL
c. Particulates, half-lives >8 days: 10 ECL
d. Liquid Effluents: 10 ECL
3. Average Energy Not applicable
4. Measurements and Approximations of Total Radioactivity Provide the methods used to measure or approximate the total radioactivity in effluents and the methods used to determine radionuclide composition.

A. Fission and activation gases: Determined by gamma spectroscopy. Total error is based on stack flow error, analytical error, and calculated sampling error.

B. Jodines: Determined by collection on charcoal with subsequent gamma spectroscopy analysis. Total error is based on stack flow error, analytical error, and calculated sampling error.

C. Particulates: Determined by collection on fixed filter with subsequent gamma spectroscopy analysis. Strontium is determined by composite analysis of filters by liquid scintillation, gross alpha by proportional counter and iron 55 by liquid scintillation. Total error is based on stack flow error, analytical error, and calculated sampling error.

D. Liquid Effluents: Determined by gamma spectroscopy. A composite sample is analyzed for strontium by liquid scintillation, tritium by liquid scintillation, gross alpha by proportional counter and iron 55 by liquid scintillation. Total error is based on the volume discharge error and analytical error.

E. ND: None Detected or No Detectable Activity

5. Batch Releases Provide the following information relating to batch releases of radioactive materials in liquid and gaseous effluents.

A. Liquid

a. Number of batch releases: 147
b. Total time for batch releases: 34658 minutes
c. Maximum time period for batch release: 1102 minutes
d. Average time period for batch release: 236 minutes
e. Minimum time period for batch release: 30 minutes
f. Average stream flow during periods of release of effluents into a flowing stream: 1.54E+06 liters per minute B. Gaseous
a. Number of batch releases: 61
b. Total time for batch releases: 30522 minutes
c. Maximum time period for batch release: 5430 minutes
d. Average time period for batch release: 500 minutes
e. Minimum time period for batch release: 1 minute
6. Abnormal Releases A. Liquid
a. Number of releases: 0
b. Total activity released: N/A B. Gaseous
a. Number of releases: 0
b. Total activity released: N/A

TABLE 1A EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2009 GASEOUS EFFLUENTS-SUMMATION OF ALL RELEASES Unit Quarter Quarter Quarter Quarter Est. Total 1 2 3 4 Error, %

1. Total releases Ci 5.57E-02 7.35E-03 2.87E-02 6.11 E-02 1.70E+01
2. Average release rate uCi/sec

. for period 7.16E-03 9.35E-04 3.61E-03 7.69E-03

3. Percent of applicable Technical Specification  %

limit 1.05E-03 1.53E-04 6.08E-04 9.64E-04 B. lodines

1. Total release Ci ND ND 1.05E-06 1.17E-05 1.50E+01
2. Average release rate uCi/sec for period N/A N/A 1.33E-07 1.48E-06
3. Percent of applicable Technical Specification  %

limit N/A N/A 2.71 E-O1 1.39E+00 C. Particulates

1. Total release Ci ND ND ND 7.79E-04 1.80E+01

.2. Average release rate uCi/sec for period N/A N/A N/A 9.87E-05

3. Percent of applicable Technical Specification  %

limit N/A N/A N/A 2.48E-04

4. Total alpha radioactivity Ci ND ND ND ND D. Tritium

[1 1. Total release J Ci [2.48E+01 1.50E+01 1.93E+01 7.74E+01 1.60E+01

2. Average release rate uCi/sec for period 3.19E+00 1.91E+00 2.43E+00 9.74E+00
3. Percent of applicable Technical Specification  %

limit II2.27E-04 3.34E-05 1.45E-04 2.48E-04

TABLE 1B EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2009)

GASEOUS EFFLUENTS-ELEVATED RELEASES CONTINUOUS Nuclides Released Unit Quarter Quarter Quarter Quarter Reeae Nulie Uni 1 2 3 4

1. Fission and activation gases argon-41 Ci ND ND ND ND krypton-85 Ci ND ND ND ND krypton-85m Ci ND ND ND ND krypton-87 Ci ND ND ND ND krypton-88 Ci ND ND ND ND xenon-131m Ci ND ND ND ND xenon-133 Ci ND ND ND ND xenon-133m Ci ND ND ND ND xenon-135 Ci ND ND ND ND xenon-135m Ci ND ND ND ND xenon-138 Ci ND ND ND ND Ci Ci unidentified Ci ND ND ND ND Total for period Ci 0.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00
2. Iodines iodine-1 31 Ci ND ND ND 1.17E-05 iodine-1 33 Ci ND ND ND ND iodine-1 35 Ci ND ND ND ND Total for period Ci O.OOE+00 0.OOE+00 0.OOE+00 1.17E-05
3. Particulates strontium-89 Ci ND ND ND ND strontium-90 Ci ND ND ND ND cesium-134 Ci ND ND ND ND cesium-137 Ci ND ND ND ND barium-lanthanum-140 Ci ND ND ND ND cobalt-58 Ci ND ND ND ND cobalt-60 Ci ND ND ND ND chromium-51 Ci ND ND ND ND manganese-54 Ci ND ND ND ND niobium-95 Ci ND ND ND ND iron-59 Ci ND ND ND ND unidentified Ci ND ND ND ND

TABLE lB EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2009)

GASEOUS EFFLUENTS-ELEVATED RELEASES BATCH Nuclides Released Unit Quarter Quarter Quarter Quarter Nulie Reeae Unit 1 2 3 4

1. Fission and activation gases argon-41 Ci 4.82E-02 6.60E-03 2.13E-02 4.03E-02 krypton-85 Ci ND ND ND ND krypton-85m Ci 1.1OE-04 ND ND ND krypton-87 Ci ND ND ND ND krypton-88 Ci ND ND ND ND xenon-131m Ci ND ND ND ND xenon-133 Ci 5.45E-03 7.51E-04 5.78E-03 2.01E-02 xenon-133m Ci ND ND ND ND xenon-135 Ci 2.02E-03 ND 1.61E-03 7.1OE-04 xenon-135m Ci ND ND ND ND xenon-138 Ci ND ND ND ND Ci unidentified Ci ND ND ND ND Total for period Ci 5.58E-02 7.35E-03 2.87E-02 6.11E-02
2. Iodines iodine-131 Ci ND ND ND ND iodine-133 Ci ND ND ND ND iodine-135 Ci ND ND ND ND Total for period Ci 0.OOE+00 0.OOE+00 0.00E+00 0.OOE+00
3. Particulates strontium-89 Ci ND ND ND ND strontium-90 Ci ND ND ND ND cesium-134 Ci ND ND ND ND cesium-137 Ci ND ND ND ND barium-lanthanum-140 Ci ND ND ND ND Ci unidentified Ci ND ND ND ND Total for period Ci 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00

TABLE iC EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2009)

GASEOUS EFFLUENTS-GROUND LEVEL RELEASES CONTINUOUS Nuclides Released Unit Quarter Quarter Quarter Quarter NuliesReeaedUnt 1 2 3 4

1. Fission and activation gases argon-41 Ci ND ND ND ND krypton-85 Ci ND ND ND ND krypton-85m Ci ND ND ND ND krypton-87 Ci ND ND ND ND krypton-88 Ci ND ND ND ND xenon-133 Ci ND ND ND ND xenon-135 Ci ND ND ND ND xenon-135m Ci ND ND ND ND xenon-138 Ci ND ND ND ND Ci Ci unidentified Ci ND ND ND ND Total for period Ci 0.OOE+00 O.OOE+00 O.OOE+00 0.OOE+00
2. Iodines iodine-131 Ci ND ND ND ND iodine-133 Ci ND ND ND ND Ci Total for period Ci 0.00E+00 .oOOE+000.OOE+00 O.OOE+00
3. Particulates strontium-89 Ci ND ND ND ND strontium-90 Ci ND ND ND ND cesium-134 Ci ND ND ND ND cesium-136 Ci ND ND ND ND cesium-137 Ci ND, ND ND ND barium-lanthanum-140 Ci ND ND ND ND cobalt-58 Ci ND ND ND 5.91 E-07 cobalt-60 Ci ND ND ND ND chromium-51 Ci ND ND ND ND unidentified Ci ND ND ND ND

TABLE IC EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2009)

GASEOUS EFFLUENTS-GROUND LEVEL RELEASES BATCH INuclidesReleased Unit Quarter Quarter Quarter Quarter NuIeReeae Uni 1 2 3 4

1. Fission and activation gases argon-41 Ci ND ND. ND ND krypton-85 Ci ND ND ND ND krypton-85m Ci ND ND ND ND krypton-87 Ci ND ND ND ND krypton-88 Ci ND ND ND ND xenon-131rm Ci ND ND ND ND xenon-133m Ci . ND ND ND ND xenon-133 Ci ND ND ND ND xenon-135 Ci ND ND ND ND xenon-135m Ci ND ND ND ND xenon-138 Ci ND ND ND ND Ci Ci unidentified Ci ND ND ND ND Total for period Ci O.OOE+00 O.OOE+00 0.OOE+00 O.OOE+00
2. Iodines iodine-131 Ci ND ND 1.03E-07 ND iodine-1 32 Ci ND ND ND ND iodine-1 33 Ci ND ND 9.44E-07 ND iodine-135 Ci ND ND ND ND Total for period Ci O.OOE+00 O.OOE+00 1.05E-06 0.OOE+00
3. Particulates strontium-89 Ci ND ND ND ND strontium-90 Ci ND ND ND ND cesium-134 Ci ND ND ND ND cesium-136 Ci ND ND ND ND cesium-137 Ci ND ND ND ND barium-lanthanum-140 Ci ND ND ND ND cobalt-57 Ci ND ND ND ND cobalt-58 Ci ND ND ND 7.78E-04 cobalt-60 Ci ND ND ND ND manganese-54 Ci ND ND ND ND iron-59 Ci ND ND ND ND niobium/zirconium-95 Ci ND ND ND ND chromium-51 Ci ND ND ND ND technetium-99m Ci ND ND ND ND bromine-82 Ci ND ND ND ND unidentified Ci ND ND ND ND Total for period Ci O.OOE+00 O.OOE+00 O.OOE+00 7.78E-04

TABLE 2A EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2009 LIQUID EFFLUENTS-SUMMATION OF ALL RELEASES Quarter 1 Quarter 2 Quarter 3 Quarter 4 Tol Eror, Unit A. Fission and activation products

1. Total releases ci 2.28E-03 3.OOE-04 2.36E-03 5.96E-03 6.00E+00
2. Average diluted concentration durina period uCi/ml 5.47E-12 4.56E-13 3.84E-12 1.44E-11
3. Percent of applicable limit  % 2.97E-03 8.87E-04 2.OOE-02 3.59E-02 B. Tritium
1. Total release ci 5.16E+01 2.67E+01 9.77E+02 3.20E+02
2. Average diluted concentration uCi/ml 1.24E-07 4.06E-08 1.59E-06 7.75E-07 durina oeriod
3. Percent of applicable limit  % 3.OOE-03 4.14E-04 8.10E-03 1.90E-02 C. Dissolved and entrained gases
1. Total release ci ND ND ND ND 1.90E+01
2. Average diluted concentration uci/mi N/A N/A N/A N/A durina period
3. Percent of applicable limit  % N/A N/A N/A N/A D. Gross alpha radioactivity
1. Total release ci ND ND ND ND 1.OOE+01

TABLE 2B EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2009 LIQUID EFFLUENTS CONTINUOUS MODE Nuclides Released Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 strontium-89 Ci ND ND ND ND strontium-90 Ci ND ND ND ND cesium-134 Ci ND ND ND ND cesium-137 Ci ND ND ND ND iodine-131 Ci ND ND ND ND iodine-133 Ci ND ND ND ND cobalt-57 Ci ND ND ND 1.81 E-07 cobalt-58 Ci ND ND ND 5.62E-04 cobalt-60 Ci ND ND ND 2.43E-07 iron-55 Ci ND ND ND ND iron-59 Ci ND ND ND ND zinc-65 Ci ND ND ND ND manganese-54 Ci ND ND ND ND chromium-51 Ci ND ND ND ND zirconium-niobium-95 Ci ND ND ND ND molybdenum-99 Ci ND ND ND ND technetium-99m Ci ND ND ND ND barium-lanthanum-140 Ci ND ND ND ND cerium-141 Ci ND ND ND ND unidentified Ci ND ND ND ND Total for period(above) CI O.OOE+00 O.OOE+00 0.OOE+00 J 5.62E-04 I xenon-1 31 m _Ci ND ND ND ND xenon-1 33m Ci ND ND ND ND xenon-1 33 Ci ND ND ND ND xenon-1 35 Ci ND ND ND ND

TABLE 2B EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2009 LIQUID EFFLUENTS BATCH MODE Nuclides Released Unit Quarter 1 Quarter 2 Quarter 3 Quarter 4 strontium-89 Ci ND ND ND ND strontium-90 Ci ND ND ND ND cesium-134 Ci ND ND ND ND cesium-137 Ci 1.04E-06 1.51 E-06 1.32E-05 ND iodine-131 Ci ND ND 2.57E-05 ND iodine-133 Ci ND ND ND ND cobalt-57 Ci 5.43E-06 ND ND ND cobalt-58 Ci 3.96E-04 1.18E-04 2.42E-04 4.19E-03 cobalt-60 Ci 1.23E-04 7.22E-05 1.44E-04 6.96E-05 chromium-51 Ci ND ND ND ND iron-55 Ci 1.60E-03 8.01E-05 1.61 E-03 9.48E-04 iron-59 Ci ND ND ND ND zinc-65 Ci ND ND ND ND manganese-54 Ci ND ND ND 4.32E-06 zirconium-niobium-95 Ci ND ND 1.78E-06 3.20E-06 molybdenum-99 Ci ND ND ND. ND technetium-99m Ci ND ND ND ND silver-11Orn Ci ND ND ND ND barium-lanthanum-140 Ci ND ND ND ND cerium-141 Ci ND ND ND ND antimony-122 Ci ND 1.28E-06 ND ND antimony-124 Ci ND ND ND ND antimony-125 Ci 1.58E-04 2.73E-05 3.28E-04 1.89E-04 antimony-126 Ci ND ND ND ND niobium-97 Ci ND ND ND ND tin-117m Ci ND ND ND ND sodium-24 Ci ND ND ND ND Tellurium-129m Ci ND ND ND ND Tellurium-132 Ci ND ND ND ND unidentified Ci ND ND ND ND Total for period(above) Ci 2.28E-03 3.OOE-04 2.36E-03 5.40E-03 xenon-133 Ci ND ND ND ND xenon-135 Ci ND- ND ND ND

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2009 SOLID WASTE AND IRRADIATED FUEL SHIPMENTS A. SOLID WASTE SHIPPED OFFSITE FOR BURIAL OR DISPOSAL (Not irradiated fuel)

1. Type of waste Unit1 year Est. Total tPeriod Error, %
a. Spent resins, filter sludges, evaporator m3 N/A N/A Bottoms, etc. Ci
b. Dry compressible waste, contaminated m3 2.53E+01 Equip, etc. Ci 1.01E+00
c. Irradiated components, control m3 Rods, etc. Ci N/A N/A
d. Other (describe): Liquids for Solidification m3 3.62E+01 2.50E+01 Ci 2.27E-03
2. Estimate of major nuclide composition (by type of waste)
a. N/A 1% I N/A
b. Fe-55  % 4.29E+01 Co-58  % 3.24E+O1 Ni-63  % 1.29E+O1 Co-60  % 4.75E+00 Nb-95  % 1.77E+00 H-3  % 1.76E+00 Zr-95  % 1.1OE+00 Cr-51  % 1.05E+00 Mn-54  % 6.43E-01 Co-57  % 2.26E-01 Sb-125  % 2.22E-01 Fe-59  % 1.65E-01 Sn- 113  % 8.OOE-02 Cs-137  % 3.58E-02 C. N/A _% N/A
d. H-3  % 3.63E+01 Co-58  % 3.40E+O1 Fe-55  % 1.95E+01 Ni-63  % 6.03E+00 Co-60  % 2.25E+00 Cs-137  % 7.96E-01 Mn-54  % 7.63E-01 Fe-59  % 3.39E-01
3. Solid Waste Disposition Number of Waste Container Solidification Mode of Destination Shipments Class Type Agent Transportation 5 A General Design N/A Truck Duratek, Oak Ridge, TN 2 A General Design N/A Truck ES, Clive, UT

B. IRRADIATED FUEL SHIPMENTS (Disposition)

Number of Shipments Mode of Transportation Destination N/A N/A N/A C. REVIEW AND APPROVAL Prepared By: Date:

Reviewed By: Date: 0ý 4110-og AnDrovedBv:

--- A A IBv-: & Date:

LIST OF APPENDICES Appendix Title A Offsite Dose Calculation Manual B Process Control Program C Liquid Holdup Tanks D Radwaste Treatment Systems E Unplanned Releases

Appendix A Offsite Dose Calculation Manual Requirement: Technical Specification 6.13.2c requires that licensee initiated changes to the Offsite Dose Calculation Manual be submitted to the Commission in the Annual Radioactive Effluent Release Report for the period in which the change(s) was made effective. Include in this changes to the Radiological Environmental Program in accordance with Offsite Dose Calculation Manual (ODCM)-C.9.1.1 and -C.9.2.1.

Response: The ODCM was changed in 2009, as described below.

  • The liquid waste release pathway was expanded to include the discharge of Temporary holding tanks through the existing Water Treatment discharge line to the Circulating Water outfall to the Atlantic Ocean, This flow path includes an on-line radiation monitor, and flow rate monitor.
  • Included an alternate Steam Generator Blowdown (SGBD) deminerlaizer effluent to Turbine Building sump release flow path as a method of controlling Condensate and Feedwater system inventory.

" Expanded the Condenser Air Evacuation Monitor Alert / Alarm Setpoint determination to include operational values that are typically small fractions of the values necessary to maintain the site boundary dose rate limits as described.in Part A Control C.7.1.1. The Station procedures implementing this change recognize the alert setpoint is typically 2 to 3 times background with the high alarm set at 2.0 E+03 cpm or higher based on primary to secondary steam generatof leakage and are not to exceed the ODCM determined maximum values.

Appendix B Process Control Program Requirement: Technical Specification 6.12.2a requires that licensee initiated changes to the Process Control Program be submitted to the Commission in the Annual Radioactive Effluent Release Report for the period in which the change(s) was made.

Response: No changes were made to the process control program in 2009.

Appendix C Liquid Holdup Tanks Requirement: Technical Specification 3.11.1.4 limits the quantity of radioactive material contained in any outside temporary tank. With the quantity of radioactive material in any outside temporary tank exceeding the limits of Technical Specification 3.11.1.4, a description of the events leading to this condition is required in the next Annual Effluent Release Report in accordanice with Tech. Spec. 6.8.1.4.

Response: From January 1, 2009 to December 31, 2009, there was no radioactive material stored in any temporary outdoor tank that exceeded the limits of T. S. 3.11.1.4.

Appendix D Radwaste Treatment Systems Requirement: Technical Specification 6.14.1 a requires that licensee initiated changes to the Radwaste Treatment Systems (liquid, gaseous, and solid) be submitted to the Commission in the Annual Radioactive Effluent Release Report for the period in which the change was made.

Response: For 2009, NextEra Energy Seabrook LLC, will submit any changes to the Radwaste Treatment Systems (liquid, gaseous and solid) as part of the FSAR update.

Appendix E Unplanned Releases Requirement: Technical Specification 6.8.1.4 requires a list and description of unplanned releases from the site to UNRESTRICTED AREAS of radioactive materials in gaseous and liquid effluents made during the reporting period.

e Submit all groundwater monitoring well sample results and a description of any significant onsite leaks/spills that impact groundwater Response: A review of the January 1, 2009 to December 31, 2009 time period indicated there were no unplanned, unanticipated or abnormal releases from the site to unrestricted areas of radioactive materials of gaseous or liquid effluents. See next sheet for groundwater monitoring well results.

2009 Ground Water Monitoring Well Tritium Data Date/Timel BD-1i BD-2 BD-3 BD-4 BD-5 BU-1 SC-1 SD-i SD-2 SD-3 SD-4 SU-1 SW-1 SW-2 SW-3 SU-10 SU-11 BU-10 BU-11 TW-1 TW-2 TW-3

.,,,Spring / Umm~F2O09 S ___ ___ ____g 3/4 03/14/09 < 550 < 550 1380 < 546 < 544 < 547 03/15/09 < 546 < 544 < 544 < 548 < 552 < 566 < 544 < 546 06/20/09 1565 1066 1441 < 617 06/21/09 < 612 <613 <610 < 619 06/27/09 1180 1780 <593 <589 <592 <592 06/28/09 < 592 < 596 < 595 < 587 < 589 06/30/09 < 631 < 627 07/04/09 1880 2360 2060 07/06/09 1160 2100 1810 07/08/09 1340 1690 07/10/09 1520 07/11/09 978 1505 1731 07/16/09 07/18/09 832 1170 1740 <592 <595 07/22/09 866 1270 2070 < 590 < 593 07/25/09 < 568 1380 2530 < 567 < 563 08/01/09 < 577 1060 1362 < 577 < 577 08/08/09 < 577 1542 1 1831 < 577 < 577 08/15/09 < 636 969 1250 < 602 < 601 08/24/09 1104 1505 1872 08/28/09 814 1290 1620 09/05/09 899 1050 1690 < 542 < 565 < 566 09/06/09 < 544 < 561 < 563 < 562 09/11/09 < 551 09/14/09 < 581 < 577 09/15/09 < 619 < 624 < 621 < 618 09/16/09 < 632 < 621 09/18/09 955 1290 2010 09/29/09 < 580 < 580 < 579 12/08/09 664 1 808 1 2130 1_ 1_< 563 1 Paired well locations: Selected well locations:

SD-1 / BD-2 South of plant near seawall inside PA fence SW-1 South of Fuel Storage Building (Indicator location) inside PA fence SD-2 / BD-3 East of plant inside owner controlled area SW-2 East of plant near Service Water Pump House inside PA fence SD-3 / BD-4 Northeast of plant inside owner controlled area SW-3 Southwest of plant near Unit 1 to Unit 2 tunnel inside PA fence SD-4 / BD-5 Southwest of plant, south of cooling tower inside owner controlled area TW-1 Southeast of plant inside owner controlled area outside PA fence SU-1 / BU-1 Northwest of plant (Background location) inside owner controlled area TW-2 Southeast of plant inside owner controlled area outside PA fence SU-1 0 / BU-1 0 North / northwest of plant inside PA fence TW-3 Southeast of plant inside owner controlled area outside PA fence SU-1 1 / BU-11 North of plant inside PA fence Definitions:

Note: All sample results in pCi/L S = Shallow C = Cross gradient U = up gradient W = well B = Bedrock D = down gradient T = temporary

ENCLOSURE 2 TO SBK-L-10083 Joint Frequency Distributions of Wind Speed, Wind Direction and Atmospheric Stability

SEABROOK JAN09-DEC09 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WiND DATA STABILITY CLASS A CLASS FREQUENCY (PERCENT) = 4.10 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW N 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 0 0 0 0 1 0 0 1 1 0 1 1 0 0 0 0 0 5 (1) .00 .00 .00 .00 .28 .00 .00 .28 .28 .00 .28 .28 .00 .00 .00 .00 .00 1.40 (2) .00 .00 .00 .00 .01 .00 .00 .01 .01 .00 .01 .01 .00 .00 .00 .00 .00 .06 4-7 0 1 1 1 6 7 16 11 0 5 1 11 8 14 2 1 0 85 (1) .00 .28 .28 .28 1.69 1.97 4.49 3.09 .00 1.40 .28 3.09 2.25 3.93 .56 .28 .00 23.88 (2) .00 .01 .01 .01 .07 .08 .18 .13 .00 .06 .01 .13 .09 .16 .02 .01 .00 .98 8-12 1 0 0 9 29 25 45 15 2 13 14 26 16 15 4 4 0 218 (1) .28 .00 .00 2.53 8.15 7.02 12.64 4.21 .56 3.65 3.93 7.30 4.49 4.21 1.12 1.12 .00 61.24 (2) .01 .00 .00 .10 .33 .29 .52 .17 .02 .15 .16 .30 .18 .17 .05 .05 .00 2.51 13-18 4 1 2 3 2 0 3 0 0 0 8 5 2 6 7 2 0 45 (1) 1.12 .28 .56 .84 .56 .00 .84 .00 .00 .00 2.25 1.40 .56 1.69 1.97 .56 .00 12.64 (2) .05 .01 .02 .03 .02 .00 .03 .00 .00 .00 .09 .06 .02 .07 .08 .02 .00 .52 19-24 0 0 1 0 0 0 -0 0 0 0 0 0 0 0 2 0 0 3 (1) .00 .00 .28 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .56 .00 .00 .84 (2) .00 .00 .01 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .02 .00 .00 .03 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 5 2 4 13 38 32 64 27 3 18 24 43 26 35 15 7 0 356 (1) 1.40 .56 1.12 3.65 10.67 8.99 17.98 7.58 .84 5.06 6.74 12.08 7.30 9.83 4.21 1.97 .00 100.00 (2) .06 .02 .05 .15 .44 .37 .74 .31 .03 .21 .28 .50 .30 .40 .17 .08 .00 4.10 (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)

SEABROOK JAN09-DEC09 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS B CLASS FREQUENCY (PERCENT) = 4.55 WIND 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 .00 100 C-3 3 0 0 1 1 0 0 0 2 2 0 0 3 0 1 1 0 14 (1) .76 .00 .00 .25 .25 .00 .00 .00 .51 .51 .00 .00 .76 .00 .25 .25 .00 3.54 (2) .03 .00 .00 .01 .01 .00 .00 .00 .02 .02 .00 .00 .03 .00 .01 .01 .00 .16 4-7 6 1 1 1 14 10 6 9 1 9 10 17 10 10 2 5 0 112 (1) 1.52 .25 .25 .25 3.54 2.53 1.52 2.28 .25 2.28 2.53 4.30 2.53 2.53 .51 1.27 .00 28.35 (2) .07 .01 .01 .01 .16 .12 .07 .10 .01 .10 .12 .20 .12 .12 .02 .06 .00 1.29 8-12 2 1 5 12 23 20 10 14 2 3 21 23 18 24 19 3 0 200 (1) .51 .25 1.2-7 3.04 5.82 5.06 2.53 3.54 .51 .76 5.32 5.82 4.56 6.08 4.81 .76 .00 50.63 (2) .02 .01 .06 .14 .26 .23 .12 .16 .02 .03 .24 .26 .21 .28 .22 .03 .00 2.30 13-18 1 0 3 5 4 1 0 0 1 1 6 6 8 13 17 0 0 66 (1) .25 .00 .76 1.27 1.01 .25 .00 .00 .25 .25 1.52 1.52 2.03 3.29 4.30 .00 .00 16.71 (2) .01 .00 .03 .06 .05 .01 .00 .00 .01 .01 .07 .07 .09 .15 .20 .00 .00 .76 19-24 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 0 0 3 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .25 .51 .00 .00 .76 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .02 .00 .00 .03 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 12 2 9 19 42 31 16 23 6 15 37 46 39 48 41 9 0 395 (1) 3.04 .51 2.28 4.81 10.63 7.85 4.05 5.82 1.52 3.80 9.37 11.65 9.87 12.15 10.38 2.28 .00 100.00 (2) .14 .02 .10 .22 .48 .36 .18 .26 .07 .17 .43 .. 53 .45 .55 .47 .10 .00 4.55 (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)

SEABROOK JAN09-DEC09 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS C CLASS FREQUENCY (PERCENT) = 7.21 WIND 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 2 1 2 3 1 1 0 0 1 0 0 2 2 2 2 1 0 20 (1) .32 .16 .32 .48 .16 .16 .00 .00 .16 .00 .00 .32 .32 .32 .32 .16 .00 3.19 (2) .02 .01 .02 .03 .01 .01 .00 .00 .01 .00 -. 00 .02 .02 .02 .02 .01 .00 .23 4-7 7 4 1 5 27 11 13 12 3 5 15 11 36 19 20 6 0 195 (1) 1.12 .64 .16 .80 4.31 1.76 2.08 1.92 .48 .80 2.40 1.76 5.75 3.04 3.19 .96 .00 31.15 (2) .08 .05 .01 .06 .31 .13 .15 .14 .03 .06 .17 .13 .41 .22 .23 .07 .00 2.24 8-12 4 4 16 18 37 13 16 13 6 6 23 31 30 46 40 8 0 311 (1) .64 .64 2.56 2.88 5.91 2.08 2.56 2.08 .96 .96 3.67 4.95 4.79 7.35 6.39 1.28 .00 49.68 (2) .05 .05 .18 .21 .43 .15 .18 .15 .07 .07 .26 .36 .35 .53 .46 .09 .00 3.58 13-18 1 0 9 8 1 0 0 0 2 0 10 8 7 20 21 1 0 88 (1) .16 .00 1.44 1.28 .16 .00 .00 .00 .32 .00 1.60 1.28 1.12 3.19 3.35 .16 .00 14.06

'(2) .01 .00 .10 .09 .01 .00 .00 .00 .02 .00 .12 .09 .08 .23 .24 .01 .00 1.01 19-24 0 0 3 0 0 0 0 0 0 0 0 0 0 3 4 0 0 10 (1) .00 .00 .48 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .48 .64 .00 .00 1.60 (2) .00 .00 .03 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .03 .05 .00 .00 .12 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 2 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .16 .16 .00 .00 .32 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .01 .00 .00 .02 ALL SPEEDS 14 9 31 34 66 25 29 25 12 11 48 52 75 91 88 16 0 626 (1) 2.24 1.44 4.95 5.43 10.54 3.99 4.63 3.99 1.92 1.76 7.67 9.31 11.98 14.54 14.06 2.56 .00 100.00 (2) .16 .10 .36 .39 .76 .29 1.33 .29 .14 .13 .55 .60 .86 1.05 1.01 .18 .00 7.21 (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)

SEABROOK JAN09-DEC09 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS D CLASS FREQUENCY (PERCENT) = 49.10 WIND 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 1 0 0 0 1 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .0D .00 .00 .02 .00 .D .00 .02 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .00 .00 .00 .01 C-3 21 19 15 17 11 9 11 14 22 14 12 19 29 27 29 23 0 292 (1) .49 .45 .35 .40 .26 .21 .26 .33 .52 .33 .28 .45 .68 .63 .68 .54 .00 6.85 (2) .24 .22 .17 .20 .13 .10 .13 .16 .25 .16 .14 .22 .33 .31 .33 .26 .00 3.36 4-7 122 116 105 148 107 70 112 120 104 84 83 95 129 127 191 106 0 1819 (1) 2.86 2.72 2.46 3.47 2.51 1.64 2.63 2.81 2.:44 1.97 1.95 2.23 3.02 2.98 4.48 2.49 .00 42.65 (2) 1.40 1.34 1.21 1.70 1.23 .81 1.29 1.38 1.20 .97 .96 1.09 1.49 1.46 2.20 1.22 .00 20.94 8-12 75 61 149 95 77 56 40 46 26 45 112 117 136 237 211 58 0 1541 (1) 1.76 1.43 3.49 2.23 1.81 1.31 .94 1.08 .61 1.06 2.63 2.74 3.19 5.56 4.95 1.36 .00 36.13 (2) .86 .70 1.72 1.09 .89 .64 .46 .53 .30 .52 1.29 1.35 1.57 2.73 2.43 .67 .00 17.74 13-18 5 4 87 29 12 8 2 1 4 14 23 15 48 142 134 5 0 533 (1) .12 .09 2.04 .68 .28 .19 .05 .02 .09 .33 .54 .35 1.13 3.33 3.14 .12 .00 12.50 (2) .06 .05 1.00 .33 .14 .09 .02 .01 .05 .16 .26 .17 .55 1.63 1.54 .06 .00 6.14 19-24 0 0 10 1 7 - 2 0 0 0 1 06 2 1 16 30 0 0 70 (1) .00 .00 .23 .02 .16 .05 .00 .00 .00 .02 .00 .05 .02 .38 .70 .00 .00 1.64 (2) .00 .00 .12 .01 .08 .02 .00 .00 .00 .01 .00 .02 .01 .18 .35 .00 .00 .81 GT 24 0 0 0 0 7 1 0 0 0 0 0 0 0 1 0 0 0 9 (1) .00 .00 .00 .00 .16 .02 .00 .00 .00 .00 .00 .00 .00 .02 .00 .00 .00 .21 (2) .00 .00 .00 .00 .08 .01 .00 .00 .00 .00 .00 .00 .00 .01 .00 .00 .00 .10 ALL SPEEDS 223 200 366 290 221 146 165 181 156 158 230 248 343 551 595 192 0 4265 (1) 5.23 4.69 8.58 6.80 5.18 3.42 3.87 4.24 3.66 3.70 5.39 5.81 8.04 12.92 13.95 4.50 .00 100.00 (2) 2.57 2.30 4.21 3.34 2.54 1.68 1.90 2.08 1.80 1.82 2.65 2.86 3.95 6.34 6.85 2.21 .00 49.10 (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)

SEABROOK JAN09-DEC09 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS E CLASS FREQUENCY (PERCENT) = 21.77 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 0 1 1 0 0 0 0 1 0 0 0 0 0 2 1 0 0 6 (1) .00 .05 .05 .00 .00 .00 .00 .05 .00 .00 .00 .00 .00 .11 .05 .00 .00 .32 (2) .00 .01 .01 .00 .00 .00 .00 .01 .00 .00 .00 .00 .00 .02 .01 .00 .00 .07 C-3 13 15 24 23 22 13 14 13 35 33 38 57 66 72 42 26 0 506 (1) .69 .79 1.27 1.22 1.16 .69 .74 .69 1.85 1.75 2.01 3.01 3.49 3.81 2.22 1.37 .00 26.76 (2) .15 .17 .28 .26 .25 .15 .16 .15 .40 .38 .44 .66 .76 .83 .48 .30 .00 5.83 4-7 30 14 17 26 23 13 16 22 32 62 87 245 175 143 129 61 0 1095 (1) 1.59 .74 .90 1.37 1.22 .69 .85 1.16 1.69 3.28 4.60 12.96 9.25 7.56 6.82 3.23 .00 57.91 (2) .35 .16 .20 .30 .26 .15 .18 .25 .37 .71 1.00 2.82 2.01 1.65 1.49 .70 .00 12.61 8-12 0 0 6 13 6 8 6 2 1 6 53 74 26 28 14 5 0 248 (1) .00 .00 .32 .69 .32 .42 .32 .11 .05 .32 2.80 3.91 1.37 1.48 .74 .26 .00 13.11 (2) .00 .00 .07 .15 .07 .09 .07 .02 .01 .07 .61 .85 .30 .32 .16 .06 .00 2.86 13-18 0 0 4 6 5 5 0 0 1 1 5 0 2 3 0 0 0 32 (1) .00 .00 .21 .32 .26 .26 .00 .00 .05 .05 .26 .00 .11 .16 .00 .00 .00 1.69 (2) .00 .00 .05 .07 .06 .06 .00 .00 .01 .01 .06 .00 .02 .03 .00 .00 .00 .37 19-24 0 0 0 0 3 1 0 0 0 0 0 0 0 0 0 0 0 4 (1) .00 .00 .00 .00 .16 .05 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .21 (2) .00 .00 .00 .00 .03 .01 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .05 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 43 30 52 68 59 40 36 38 69 102 183 376 269 248 186 92 0 1891 (1) 2.27 1.59 2.75 3.60 3.12 2.12 1.90 2.01 3.65 5.39 9.68 19.88 14.23 13.11 9.84 4.87 .00 100.00 (2) .50 .35 .60 .78 .68 .46 .41 .44 .79 1.17 2.11 4.33 3.10 2.86 2.14 1.06 .00 21.77 (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)

SEABROOK JAN09-DEC09 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS F CLASS FREQUENCY (PERCENT) = 7.49 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 0 1 0 0 1 0 0 0 0 2 0 0 1 0 1 1 0 7 (1) .00 .15 .00 .00 .15 .00 .00 .00 .00 .31 .00 .00 .15 .00 .15 .15 .00 1.08 (2) .00 .01 .00 .00 .01 .00 .00 .00 .00 .02 .00 .00 .01 .00 .01 .01 .00 .08 C-3 14 2 8 14 16 7 1 2 8 21 38 58 77 74 46 11 0 397 (1) 2.15 .31 1.23 2.15 2.46 1.OB .15 .31 1.23 3.23 5.B4 8.91 11.83 11.37 7.07 1.69 .00 60.98 (2) .16 .02 .09 .16 .18 .08 .01 .02 .09 .24 .44 .67 .89 .85 .53 .13 .00 4.57 4-7 9 1 3 1 3 3 4 3 3 7 11 51 36 31 66 14 0 246 (1) 1.38 .15 .46 .15 .46 .46 .61 .46 .46 1.08 1.69 7.83 5.53 4.76 10.14 2.15 .00 37.79 (2) .10 .01 .03 .01 .03 .03 .05 .03 .03 .08 .13 .59 .41 .36 .76 .16 .00 2.83 8-12 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 .15 .00 .00 .15 (2) z00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .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 23 4 11 15 20 10 5 5 11 30 49 109 114 105 114 26 0 651 (1) 3.53 .61 1.69 2.30 3.07 1.S4 .77 .77 1.69 4.61 7.53 16.74 17.51 16.13 17.51 3.99 .00 100.00 (2) .26 .05 .13 .17 .23 .12 .06 .06 .13 .35 .56 1.25 1.31 1.21 1.31 .30 .00 7.49 (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)

SEABROOK JAN09-DEC09 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS G CLASS FREQUENCY (PERCENT) = 5.78 WIND 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 1 0 0 1 0 0 0 0 1 1 1 1 2 1 0 9 (1) .00 .00 .20 .00 .00 .20 .00 .00 .00 .00 .20 .20 20 .20 .40 .20 .00 1.79 (2) .00 .00 .01 .00 .00 .01 .00 .00 .00 .00 .01 .01 .01 .01 .021 .01 .00 .10 C-3 4 4 5 6 5 0 1 1 1 5 24 62 117 119 41 10 0 405 (1) .80 .80 1.00 1.20 1.00 .00 .20 .20 .20 1.00 4.78 12.35 23.31 23.71 8.17 1.99 .00 80.68 (2) .05 .05 .06 .07 .06 .00 .01 .01 .01 .06 .28 .71 1.35 1.37 .47 .12 .00 4.66 4-7 1 0 1 0 5 0 0 0 0 1 7 13 12 16 27 4 0 87 (1) .20 .00 .20 .00 1.00 .00 .00 .00 .00 .20 1.39 2.59 2.39 3.19 5.38 .80 .00 17.33 (2) .01 .00 .01 .00 .06 .00 .00 .00 .00 .01 .08 .15 .14 .18 .31 .05 .00 1.00 8-12 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 (1) .00 .00 .00 .00 .00 .00 .20 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .20 (2) .00 .00 .00 .00 .00 .00 .01 .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 5 4 7 6 10 1 2 1 1 6 32 76 130 136 70 15 0 502 (1) 1.00 .80 1.39 1.20 1.99 .20 .40 .20 .20 1.20 6.37 15.14 25.90 27.09 13.94 2.99 .00 100.00 (2) .06 .05 .08 .07 .12 .01 .02 .01 .01 .07 .37 .87 1.50 1.57 .81 .17 .00 5.78 (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)

SEABROOK JAN09-DEC09 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 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 W WNW NW NNW VRBL TOTAL MPH CALM 0 2 2 0 1 1 0 1 0 2 1 1 2 '4 4 2 0 23 (1) .00 .02 .02 .00 .01 .01 .00 .01 .00 .02 .01 .01 .02 .05 .05 .02 .00 .26 (2) .00 .02 .02 .00 .01 .01 .00 .01 .00 .02 .01 .01 .02 .05 .05 .02 .00 .26 C-3 57 41 54 64 57 30 27 31 70 75 113 199 294 294 161 72 0 1639 (1) .66 .47 .62 .74 .66 .35 .31 .36 .81 .86 1.30 2.29 3.38 3.38 1.85 .83 .00 18.87 (2) .66 .47 .62 .74 .66 .35 .31 .36 .81 .86 1.30 2.29 3.38 3.38 1.85 .83 .00 18.87 4-7 175 137 129 182 185 114 167 177 143 173 214 443 406 360 437 197 0 3639 (1) 2.01 1.58 1.49 2.10 2.13 1.31 1.92 2.04 1.65 1.99 2.46 5.10 4.67 4.14 5.03 2.27 .00 41.90 (2) 2.01 1.58 1.49 2.10 2.13 1.31 1.92 2.04 1.65 1.99 2.46 5.10 4.67 4.14 5.03 2.27 .00 41.90 8-12 82 66 176 147 172 122 118 90 37 73 223 271 226 350 289 78 0 2520 (1) .94 .76 2.03 1.69 1.98 1.40 1.36 1.04 .43 .84 2.57 3.12 2.60 4.03 3.33 .90 .00 29.01 (2) .94 .76 2.03 1.69 1.98 1.40 1.36 1.04 .43 .84 2.57 3.12 2.60 4.03 3.33 .90 .00 29.01 13-18 11 5 105 51 24 14 5 1 8 16 52 34 67 184 179 8 0 764 (1) .13 .06 1.21 .59 .28 .16 .06 .01 .09 .18 .60 .39 .77 2.12 2.06 .09 .00 8.80 (2) .13 .06 1.21 .59 .28 .16 .06 .01 .09 .18 .60 .39 .77 2.12 2.06 .09 .00 8.80 19-24 0 0 14 1 10 3 0 0 0 1 0 2 1 20 38 0 0 90 (1) .00 .00 .16 .01 .12 .03 .00 .00 .00 .01 .00 .02 .01 .23 .44 .00 .00 1.04 (2) .00 .00 .16 .01 .12 .03 .00 .00 .00 .01 .00 .02 .01 .23 .44 .00 .00 1.04 GT 24 0 0 0 0 7 1 0 0 0 0 0 0 0 2 1 0 0 11 (1) .00 .00 .00 .00 .08 .01 .00 .00 .00 .00 .00 .00 .00 .02 .01 .00 .00 .13 (2) .00 .00 .00 .00 .08 .01 .00 .00 .00 .00 .00 .00 .00 .02 .01 .00 .00 .13 ALL SPEEDS 325 251 480 445 456 285 317 300 258 340 603 950 996 1214 1109 357 0 8686 (1) 3.74 2.89 5.53 5.12 5.25 3.28 3.65 3.45 2.97 3.91 6.94 10.94 11.47 13.98 12.77 4.11 .00 100.00 (2) 3.74 2.89 5.53 5.12 5.25 3.28 3.65 3.45 2.97 3.91 6.94 10.94 11.47 13.98 12.77 4.11 .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)

SEABROOK JAN09-DEC09 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND DATA STABILITY CLASS A CLASS FREQUENCY (PERCENT) = 4.10 WIND 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 0 0 1 0 0 0 0 1 0 0 1 0 0 0 1 0 0 4 (1) .00 .00 .28 .00 .00 .00 .00 .28 .00 .00 ' .28 .00 .00 .00 .28 .00 .00 1.12 (2) .00 .00 .01 .00 .00 .00 .00 .01 .00 .00 .01 .00 .00 .00 .01 .00 .00 .05 4-7 0 1 0 2 3 1 6 0 1 0 4 1 1 2 1 0 0 23 (1) .00 .28 .00 .56 .84 .28 1.69 .00 .28 .00 1.12 .28 .28 .56 .28 .00 .00 6.46 (2) .00 .01 .00 .02 .03 .01 .07 .00 .01 .00 .05 .01 .01 .02 .01 .00 .00 .27 8-12 1 0 2 6 21 19 48 14 0 5 9 13 17 16 5 2 0 178 (1) .28 .00 .56 1.69 5.90 5.34 13.48 3.93 .00 1.40 2.53 3.65 4.78 4.49 1.40 .56 .00 50.00 (2) .01 .00 .02 .07 .24 .22 .55 .16 .00 .06 .10 .15 .20 .18 .06 .02 .00 2.05 13-18 2 0. 2 6 4 1 24 12 1 8 11 14 14 9 6 1 0 115 (1) .56 .00 .56 1.69 1.12 .28 6.74 3.37 .28 2.25 3.09 3.93 3.93 2.53 1.69 .28 .00 32.30 (2) .02 .00 .02 .07 .05 .01 .28 .14 .01 .09 .13 .16 .16 .10 .07 .01 .00 1.33 19-24 4 1 1 0 0 0 1 3 0 0 2 5 4 7 2 2 0 32 (1) 1.12 .28 .28 .00 .00 .00 .28 .84 .00 .00 .56 1.40 1.12 1.97 .56 .56 .00 8.99 (2) .05 .01 .01 .00 .00 .00 .01 .03 .00 .00 .02 .06 .05 .08 .02 .02 .00 .37 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 1 3 0 0 0 4 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .28 .84 .00 .00 .00 1.12 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .03 .00 .00 .00 .05 ALL SPEEDS 7 2 6 14 28 21 79 30 2 13 27 33 37 37 15 5 0 356 (1) 1.97 .56 1.69 3.93 7.87 5.90 22.19 8.43 .56 3.65 7.58 9.27 10.39 10.39 4.21 1.40 .00 100.00 (2) .08 .02 .07 .16 .32 .24 .91 .35 .02 .15 .31 .38 .43 .43 .17 .06 .00 4.10 (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)

SEABROOK JAN09-DEC09 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND DATA STABILITY CLASS B CLASS FREQUENCY (PERCENT) = 4.55 WIND 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 2 0 1 1 1 0 1 0 0 1 0 0 0 1 1 1 0 10 (1) .51 .00 .25 .25 .25 .00 .25 .00 .00 .25 .00 .00 .00 .25 .25 .25 .00 2.53 (2) .02 .00 .01 .01 .01 .00 .01 .00 .00 .01 .00 .00 .00 .01 .01 .01 .00 .12 4-7 2 1 1 2 7 7 4 2 1 6 3 6 7 5 3 2 0 59 (1) .51 .25 .25 .51 1.77 1.77 1.01 .51 .25 1.52 .76 1.52 1.77 1.27 .76 .51 .00 14.94 (2) .02 .01 .01 .02 .08 .08 .05 .02 .01 .07 .03 .07 .08 .06 .03 .02 .00 .68 8-12 4 1 4 10 22 15 18 11 1 10 16 20 16 16 8 1 0 173 (1) 1.01 .25 1.01 2.53 5.57 3.80 4.56 2.78 .25 2.53 4.05 5.06 4.05 4.05 2.03 .25 .00 43.80 (2) .05 .01 .05 .12 .25 .17 .21 .13 .01 .12 .18 .23 .18 .18 .09 .01 .00 1.99 13-18 1 2 8 3 5 2 5 6 2 2 5 17 15 23 15 0 0 1il (1) .25 .51 2.03 .76 1.27 .51 1.27 1.52 .51 .51 1.27 4.30 3.80 5.82 3.80 .00 .00 28.10 (2) .01 .02 .09 .03 .06 .02 .06 .07 .02 .02 .06 .20 .17 .27 .17 .00 .00 1.28 19-24 1 0 0 0 1 0 1 0 1 0 4 4 5 8 10 0 0 35 (1) .25 .00 .00 .00 .25 .00 .25 .00 .25 .00 1.01 1.01 1.27 2.03 2.53 .00 .00 8.86 (2) .01 .00 .00 .00 .01 .00 .01 .00 .01 .00 .05 .05 .06 .09 .12 .00 .00 .40 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 3 3 1 0 0 7 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .76 .76 .25 .00 .00 1.77 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .03 .03 .01 .00 .00 .08 ALL SPEEDS 10 4 14 16 36 24 29 19 5 19 28 47 46 56 38 4 0 395 (1) 2.53 1.01 3.54 4.05 9.11 6.08 7.34 4.81 1.27 4.81 7.09 11.90 11.65 14.18 9.62 1.01 .00' 100.00 (2) .12 .05 .16 .18 .41 .28 .33 .22 .06 .22 .32 .54 .53 .65 .44 .05 .00 4.55 (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)

SEABROOK JAN09-DEC09 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND DATA STABILITY CLASS C CLASS FREQUENCY (PERCENT) = 7.21 WIND 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 0 0 1 2 2 0 2 0 0 0 0 3 1 2 1 3 0 17 (1) .00 .00 .16 .32 .32 .00 .32 .00 .00 .00 .00 .48 .16 .32 .16 .48 .00 2.72 (2) .00 .00 .01 .02 .02 .00 .02 .00 .00 .00 .00 .03 .01 .02 .01 .03 .00 .20 4-7 5 2 3 3 13 11 7 1 2 2 9 9 10 10 5 6 0 98 (1) .80 .32 .48 .48 2.08 1.76 1.12 .16 .32 .32 1.44 1.44 1.60 1.60 .80 .96 .00 15.65 (2) .06 .02 .03 .03 .15 .13 .08 .01 .02 .02 .10 .10 .12 .12 .06 .07 .00 1.13 8-12 8 4 9 19 27 24 18 20 5 6 18 18 33 30 21 5 0 265 (1) 1.28 .64 1.44 3.04 4.31 3.83 2.88 3.19 .80 .96 2.88 2.88 5.27 4.79 3.35 .80 .00 42.33 (2) .09 .05 .10 .22 .31 .28 .21 .23 .06 .07 .21 .21 .38 .35 .24 .06 .00 3.05 13-18 0 4 20 5 3 1 5 7 3 5 13 18 22 40 19 2 0 167 (1) .00 .64 3.19 .80 .48 .16 .80 1.12 .48 .80 2.08 2.88 3.51 6.39 3.04 .32 .00 26.68 (2) .00- .05 .23 .06 .03 .01 .06 .08 .03 .06 .15 .21 .25 .46 .22 .02 .00 1.92 19-24 2 1 3 0 0 0 0 0 1 0 2 7 10 25 12 0 0 63 (1) .32 .16 .48 .00 .00 .00 .00 .00 .16 .00 .32 1.12 1.60 3.99 1.92 .00 .00 10.06 (2) .02 .01 .03 .00 .00 .00 .00 .00 .01 .00 .02 .08 .12 .29 .14 .00 .00 .73 GT 24 0 0 2 0 0 0 0 0 0 0 0 0 2 8 4 0 0 16 (1) .00 .00 .32 .00 .00 .00 .00 .00 .00 .00 .00 .00 .32 1.28 .64 .00 .00 2.56 (2) .00 .00 .02 .00 .00 .00 .00 .00 .00 .00 .00 .00 .02 .09 .05 .00 .00 .18 ALL SPEEDS 15 11 38 29 45 36 32 28 11 13 42 55 78 115 62 16 0 626 (1) 2.40 1.76 6.07 4.63 7.19 5.75 5.11 4.47 1.76 2.08 6.71 8.79 12.46 18.37 9.90 2.56 .00 100.00 (2) .17 .13 .44 .33 .52 .41 .37 .32 .13 .15 .48 .63 .90 1.33 .71 .18 .00 7.21 (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)

SEABROOK JAN09-DEC09 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND DATA STABILITY CLASS D CLASS FREQUENCY (PERCENT) = 49.06 WIND 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 7 3 6 9 5 6 3 6 4 3 6 7 7 3 8 7 0 90 (1) .16 .07 .14 .21 .12 .14 .07 .14 .09 .07 .14 .16 .16 .07 .19 .16 .00 2.11 (2) .08 .03 .07 .10 .06 .07 .03 .07 .05 .03 .07 .08 .08 .03 .09 .08 .00 1.04 4-7 60 51 61 65 54 38 70 49 41 37 24 38 48 37 63 65 0 801 (1) 1.41 1.20 1.43 1.53 1.27 .89 1.64 1.15 .96 .87 .56 .89 1.13 .87 1.48 1.53 .00 18.82 (2) .69 .59 .70 .75 .62 .44 .81 .56 .47 .43 .28 .44 .55 .43 .73 .75 .00 9.23 8-12 113 102 116 112 56 65 86 122 91 82 79 74 89 143 135 87 0 1552 (1) 2.65 2.40 2.72 2.63 1.32 1.53 2.02 2.87 2.14 1.93 1.86 1.74 2.09 3.36 3.17 2.04 .00 36.46 (2) 1.30 1.18 1.34 1.29 .65 .75 .99 1.41 1.05 .94 .91 .85 1.03 1.65 1.56 1.00 .00 17.88 13-18 73 87 118 47 15 21 19 36 22 35 96 79 113 230 159 45 0 1195 (1) 1.71 2.04 2.77 1.10 .35 .49 .45 .85 .52 .82 2.26 1.86 2.65 5.40 3.74 1.06 .00 28.07 (2) .84 1.00 1.36 .54 .17 .24 .22 .41 .25 .40 1.11 .91 1.30 2.65 1.83 .52 .00 13.77 19-24 13 9 52 12 8 9 13 5 2 14 17 13 83 167 78 1 0 496 (1) .31 .21 1.22 .28 .19 .21 .31 .12 .05 .33 .40 .31 1.95 3.92 1.83 .02 .00 11.65 (2) .15 .10 .60 .14 .09 .10 .15 .06 .02 .16 .20 .15 .96 1.92 .90 .01 .00 5.72 GT 24 1 3 9 2 18 1 1 1 0 1 0 3 13 41 29 0 0 123 (1) .02 .07 .21 .05 .42 .02 .02 .02 .00 .02 .00 .07 .31 .96 .68 .00 .00 2.89 (2) .01 .03 .10 .02 .21 .01 .01 .01 .00 .01 .00 .03 .15 .47 .33 .00 .00 1.42 ALL SPEEDS 267 255 362 247 156 140 192 219 160 172 222 214 353 621 472 205 0 4257 (1) 6.27 5.99 8.50 5.80 3.66 3.29 4.51 5.14 3.76 4.04 5.21 5.03 8.29 14.5p 11.09 4.82 .00 100.00 (2) 3.08 2.94 4.17 2.85 1.80 1.61 2.21 2.52 1.84 1.98 2.56 2.47 4.07 7.16 5.44 2.36 .00 49.06 (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)

SEABROOK JAN09-DEC09 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND'DATA STABILITY CLASS E CLASS FREQUENCY (PERCENT) = 21.79 WIND 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 4 4 2 4 4 7 7 9 3 4 3 3 3 1 3 3 0 64 (1) .21 .21 .11 .21 .21 .37 .37 .48 .16 .21 .16 .16 .16 .05 .16 .16 .00 3.38 (2) .05 .05 .02 .05 .05 .08 .08 .10 .03 .05 .03 .03 .03 .01 .03 .03 .00 .74 4-7 19 13 16 18 14 15 23 18 26 31 21 23 16 21 20 25 0 319 (1) 1.00 .69 .85 .95 .74 .79 1.22 .95 1.37 1.64 1.11 1.22 .85 1.11 1.06 1.32 .00 16.87 (2) .22 .15 .18 .21 .16 .17 .27 .21 .30 .36 .24 .27 .18 .24 .23 .29 .00 3.68 8-12 62 28 9 15 5 6 8 33 48 88 79 132 113 114 98 59 0 897 (1) 3.28 1.48 .48 .79 .26 .32. .42 1.75 2.54 4.65 4.18 6.98 5.98 6.03 5.18 3.12 .00 47.44 (2) .71 .32 .10 .17 .06 .07 .09 .38 .55 1.01 .91 1.52 1.30 1.31 1.13 .68 .00 10.34 13-18 17 9 5 18 5 6 2 8 7 14 74 132 97 110 44 9 0 557 (1) .90 .48 .26 .95 .26 .32 .11 .42 .37 .74 3.91 6.98 5.13 5.82 2.33 .48 .00 29.46 (2) .20 .10 .06 .21 .06 .07 .02 .09 .08 .16 .85 1.52 1.12 1.27 .51 .10 .00 6.42 19-24 0 0 2 3 6 5 0 0 1 1 8 4 6 9 1 1 0 47 (1) .00 .00 .11 .16 .32 .26 .00 .00 .05 .05 .42 .21 .32 .48 .05 .05 .00 2.49 (2) .00 .00 .02 .03 .07 .06 .00 .00 .01 .01 .09 .05 .07 .10 .01 .01 .00 .54 GT 24 0 0 0 1 3 3 0 0 0 0 0 0 0 0 0 0 0 7 (1) .00 .00 .00 .05 .16 .16 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .37 (2) .00 .00 .00 .01 .03 .03 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .08 ALL SPEEDS 102 54 34 59 37 42 40 68 85 138 185 294 235 255 166 97 0 1891 (1) 5.39 2.86 1.80 3.12 1.96 2.22 2.12 3.60 4.49 7.30 9.78 15.55 12.43 13.48 8.78 5.13 .00 100.00 (2) 1.18 .62 .39 .68 .43 .48 .46 .78 .98, 1.59 2.13 3.39 2.71 2.94 1.91 1.12 .00 21.79 (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)

SEABROOK JAN09-DEC09 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND DATA STABILITY CLASS F CLASS FREQUENCY (PERCENT) = 7.50 WIND 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 4 4 2 1 3 1 1 5 2 1 4 5 6 2 4 3 0 48 (1) .61 .61 .31 .15 .46 .15 .15 .77 .31 .15 .61 .77 .92 .31 .61 .46 .00 7.37 (2) .05 .05 .02 .01 .03 .01 .01 .06 .02 .01 .05 .06 .07 .02 .05 .03 .00 .55 4-7 12 6 5 3 1 6 7 16 15 23 19 19 10 17 7 14 0 180 (1) 1.84 .92 .77 .46 .15 .92 1.08 2.46 2.30 3.53 2.92 2.92 1.54 2.61 1.08 2.15 .00 27.65 (2) .14 .07 .06 .03 .01 .07 .08 .18 .17 .27 .22 .22 .12 .20 .08 .16 .00 2.07 8-12 41 9 3 1 1 1 0 6 18 33 30 26 38 45 38 33 0 323 (1) 6.30 1.38 .46 .15 .15 .15 .00 .92 2.76 5.07 4.61 3.99 5.84 6.91 5.84 5.07 .00 49.62 (2) .47 .10 .03 .01 .01 .01 .00 .07 .21 .38 .35 .30 .44 .52 .44 .38 .00 3.72 13-18 11 4 1 0 0 1 0 0 0 2 9 21 21 8 10 12 0 100 (1) 1.69 .61 .15 .00 .00 .15 .00 .00 .00 .31 1.38 3.23 3.23 1.23- 1.54 1.84 .00 15.36 (2) .13 .05 .01 .00 .00 .01 .00 .00 .00 .02 .10 .24 .24 .09 .12 .14 .00 1.15 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 68 23 11 5 5 9 8 27 35 59 62 71 75 72 59 62 0 6S1 (1) 10.45 3.53 1.69 .77 .77 1.38 1.23 4.15 5.38 9.06 9.52 10.91 11.52 11.06 9.06 9.52 .00 100.00 (2) .78 .27 .13 .06 .06 .10 .09 .31 .40 .68 .71 .82 .86 .83 .68 .71 .00 7.50 (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)

SEABROOK JAN09-DEC09 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND DATA STABILITY CLASS G CLASS FREQUENCY (PERCENT) = 5.78 WIND 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 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 (1) .00 .00 .20 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .20 (2) .00 .00 .01 .00 .00 .00 .00 .00 - .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 C-3 4 2 3 3 2 0 4 2 4 1 3 3 2 2 4 1 0 40 (1) .80 .40 .60 .60 .40 .00 .80 .40 .80 .20 .60 .60 .40 .40 .80 .20 .00 7.97 (2) .05 .02 .03 .03 .02 .00 .05 .02 .05 .01 .03 .03 .02 .02 .05 .01 .00 .46 4-7 9 6 4 4 5 4 8 8 11 17 19 14 25 16 14 8 0 172 (1) 1.79 1.20 .80 .80 1.00 .80 1.59 1.59 2.19 3.39 3.78 2.79 4.98 3.19 2.79 1.59 .00 34.26 (2) .10 .07 .05 .05 .06 .05 .09 .09 .13 .20 .22 .16 .29 .18 .16 .09 .00 1.98 8-12 12 3 4 0 0 1 1 5 11 11 31 38 45 34 28 26 0 250 (1) 2.39 .60 .80 .00 .00 .20 .20 1.00 2.19 2.19 6.18 7.57 8.96 6.77 5.58 5.18 .00 49.80 (2) .14 .03 .05 .00 .00 .01 .01 .06 .13 .13 .36 .44 .52 .39 .32 1.30 .00 2.88 13-18 0 5 1 0 0 0 0 0 3 0 2 9 5 5 4 5 0 39 (1) .00 1.00 .20 .00 .00 .00 .00 .00 .60 .00 .40 1.79 1.00 1.00 .80 1.00 .00 7.77 (2) .00 .06 .01 .00 .00 .00 .00 .00 .03 .00 .02 .10 .06 .06 .05 .06 .00 .45 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 25 16 13 7 7 5 13 15 29 29 55 64 77 57 50 40 0 502 (1) 4.98 3.19 2.59 1.39 1.39 1.00 2.59 2.99 5.78 5.78 10.96 12.75 15.34 11.35 9.96 7.97 .00 100.00 (2) .29 .18 .15 .08 .08 .06 .15 .17 .33 .33 .63 .74 .89 .66 .58 .46 .00 5.78 (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)

SEABROOK JAN09-DEC09 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 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 W WNW NW NNW VRBL TOTAL MPH CALM 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 (1) .00 .00 .01 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 (2) .00 .00 .01 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 C-3 21 13 16 20 17 14 18 23 13 10 17 21 19 11 22 18 0 273 (1) .24 .15 .18 .23 .20 .16 .21 .27 .15 .12 .20 .24 .22 .13 .25 .21 .00 3.15 (2) .24 .15 .18 .23 .20 .16 .21 .27 .15 .12 .20 .24 .22 .13 .25 .21 .00 3.15 4-7 107 80 90 97 97 82 125 94 97 116 99 110 117 108 113 120 0 1652 (1) 1.23 .92 1.04 1.12 1.12 .94 1.44 1.08 1.12 1.34 1.14 1.27 1.35 1.24 1.30 1.38 .00 19.04 (2) 1.23 .92 1.04 1.12 1.12 .94 1.44 1.08 1.12 1.34 1.14 1.27 1.35 1.24 1.30 1.38 .00 19.04 8-12 241 147 147 163 132 131 179 211 174 235 262 321 351 398 333 213 0 3638 (1) 2.78 1.69 1.69 1.88 1.52 1.51 2.06 2.43 2.01 2.71 3.02 3.70 4.04 4.59 3.84 2.45 .00 41.92 (2) 2.78 1.69 1.69 1.88 1.52 1.51 2.06 2.43 2.01 2.71 3.02 3.70 4.04 4.59 3.84 2.45 .00 41.92 13-18 104 ill 155 79 32 32 55 69 38 66 210 290 287 425 257 74 0 2284 (1) 1.20 1.28 1.79 .91 .37 .37 .63 .80 .44 .76 2.42 3.34 3.31 4.90 2.96 .85 .00 26.32 (2) 1.20 1.28 1.79 .91 .37 .37 .63 .80 .44 .76 2.42 3.34 3.31 4.90 2.96 .85 .00 26.32 19-24 20 11 58 15 15 14 15 8 5 15 33 33 108 216 103 4 0 673 (1) .23 .13 .67 .17 .17 .16 .17 .09 .06 .17 .38 .38 1i24 2.49 1.19 .05 .00 7.76 (2) .23 .13 .67 .17 .17 .16 .17 .09 .06 .17 .38 .38 1.24 2.49 1.19 .05 .00 7.76 GT 24 1 3 11 3 21 4 1 1 0 1 0 3 19 55 34 0 0 157 (1) .01 .03 .13 .03 .24 .05 .01 .01 .00 .01 .00 .03 .22 .63 .39 .00 .00 1.81 (2) .01 .03 .13. .03 .24 .05 .01 .01 .00 .01 .00 .03 .22 .63 .39 .00 .00 1.81 ALL SPEEDS 494 365 478 377 314 277 393 406. 327 443 621 778 901 1213 862 429 0 8678 (1) 5.69 4.21 5.51 4.34 3.62 3.19 4.53 4.68 3.77 5.10 7.16 8.97 10.38 13.98 9.93 4.94 .00 100.00 (2) 5.69 4.21 5.51 4.34 3.62 3.19 4.53 4.68 3.77 5.10 7.16 8.97 10.38 13.98 9.93 4.94 .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)

ENCLOSURE 3 TO SBK-L-10083 Radiation Dose Assessment

Seabrook Station Radiological Effluent Impact Assessment For 2009 (Annual Radioactive Effluent Release Report)

I. Summary Seabrook Technical Specification Sections 6.7.6.g.4 & 9 require that limitations be placed on the quarterly and annual doses or dose commitments to Members of the Public from radioactive materials in liquid and gaseous effluents released from the station to Unrestricted Areas at or beyond the site boundary conforming to the dose objectives of Appendix I to 10 CFR Part 50. Technical Specification 6.7.6.g.8 requires that limitations on the quarterly and annual air doses resulting from noble gases released in gaseous effluents to areas beyond the site boundary also conform to Appendix I to 10 CFR Part 50. In a similar fashion, Technical Specification 6.7.6.g. 11 requires limitations on the annual dose or dose commitment to any Member of the Public due to radioactivity and radiation from uranium fuel cycle sources conforming to the EPA Radiation Standards in 40 CFR Part 190. The following table details the above referenced effluent dose limits.

DOSE OBJECTIVE CRITERIA FOR COMPLIANCE EFFLUENT TYPE DOSE TYPE QUARTERLY LIMITS ANNUAL LIMITS LIQUIDS Total Body 1.5 mrem 3 mrem (IOCFR50, APP. I) Max. Organ 5 mrem 10 mrem NOBLE GAS Gamma Air 5 mrad 10 mrad (I0CFR50, APP. I) Beta Air 10 mrad 20 mrad GAS PARTICULATE (IOCFR50, APP. I) Max. Organ 7.5 mrem 15 mrem TOTAL DOSE Total Body & organ 25 mrem (40CFR190) Thyroid

[liquids, gas, direct] 75 mrem Technical Specification 6.8.1.4 and the Seabrook Offsite Dose Calculation Manual (ODCM) Part A, Section 10.2, provides that the Station's Annual Radioactive Effluent Release Report include a demonstration of compliance with the above off-site dose limitations, as well as the determination of dose impacts to Members of the Public who may be associated with permitted activities inside the site boundary.

Doses resulting from actual liquid and gaseous effluents from Seabrook Station during 2009 were calculated in accordance with Method II as defined in the Station Offsite Dose Calculation Manual. The calculation methods follow the models in Regulatory Guide 1.109 (Reference 1). The assessments included maximum whole body doses and organ doses from all liquid releases, maximum offsite organ doses resulting from airborne iodine, tritium and particulate radionuclides with half-lives greater than eight days, and maximum offsite beta air and gamma air doses from airborne noble gases. Calculated dose impacts from airborne effluents included atmospheric dispersion estimates utilizing concurrent meteorology recorded by the Station's on-site meteorological tower. In addition, the potential direct dose AREVA Doc.# 47-9136625-000 I

from fixed radiation sources from both plant operations and dry fuel storage were evaluated as part of the assessment required under 40 CFR Part 190 for doses from the uranium fuel cycle.

Doses were also calculated for the special receptor locations inside the site boundary where the public might be granted access for recreational or educational purposes. The Science and Nature Center is located in the southwest portion of the site and offers educational opportunities on nuclear power and the environment. The "Rocks" is an area northeast of the main plant facilities with access to Brown's Creek and the tidal marsh that borders the site.

All calculated liquid and gaseous pathway doses for the 2009 reporting period are well below the dose criteria of 10CFR50, Appendix I, and the dose limits for effluent releases stated in the ODCM. In addition, the total dose to the most limiting Member of the Public due to the combined exposure to plant liquid and gaseous effluents and direct radiation from fixed plant and dry fuel storage sources was below the dose standards of 40CFR190.

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II. Method for Calculating the Total Body and Maximum Organ Doses Resulting from Liquid Releases Liquid waste generated during plant operations is processed and discharged to the environment via the station's circulating water-cooling system. The cooling system utilizes an offshore-submerged multi-port diffuser discharge for rapid dissipation and mixing of liquid effluents in the ocean environment. A 22-port diffuser section of the discharge system is located in approximately 50 to 60 feet of water with each nozzle 7 to 10 feet above the sea floor. Eleven riser shafts, with two diffuser nozzles each for the diffuser, are spaced about 100 feet apart over a distance of about 1000 feet. Water is discharged in a generally eastward direction away from the shoreline through the multi-port diffuser, beginning at a location over one mile offshore. During power operations, these high velocity jets passively entrain about ten volumes of fresh water into the near field jet-mixing region before the plume reaches the water surface.

This arrangement also effectively prevents the discharge plume (at least to the 1 degree or 40 to 1 dilution isopleth) from impacting the shoreline over the tidal cycle.

During shutdown periods, the high velocity jet mixing created by the normal circulating water flow at the diffuser nozzles is reduced. However, mixing within the discharge tunnel water volume is significantly increased due to the long transit time for batch discharges to travel the three miles from the plant through the 19-foot diameter tunnels to the diffuser nozzles. Additional mixing of the effluent in the near field assures that an equivalent overall 10 to 1 dilution occurs by the time the effluent reaches the ocean surface.

The exposure pathways considered in the calculations of total body and maximum organ doses resulting from liquid discharges from Seabrook Station are limited to ingestion of aquatic foods and exposure to shoreline deposits. The dose calculations do not include the ingestion of potable water or irrigated vegetation as potential exposure pathways because the liquid effluents from the plant are discharged into salt water.

The dose assessment models utilized in the Offsite Dose Calculation Manual (ODCM) (Reference

2) are taken from Regulatory Guide 1.109 (Reference 1). The total body and organ doses are evaluated for each of the four age groups (i.e., infant, child, teen and adult) to determine the maximum total body dose and maximum organ dose via all existing exposure pathways (i.e., fish and aquatic invertebrate ingestion, and shoreline exposure) to an age-dependent individual from all detected radionuclides in plant releases.

The values for the various factors considered in the model equations are provided in Regulatory Guide 1.109 and the ODCM (see Table D). The flow rate of the liquid effluent (F) and the radionuclide activities (Qi) are measured specifically prior to each liquid release. The values for half-lives for radionuclides (T,/2) and their radioactive decay constants (Xi) have been taken from Kocher (Reference 3).

Table A presents the calculated liquid pathway doses for each calendar quarter and total for the year. The calculated annual doses as a percent of the applicable regulatory limits are shown in Table C.

The estimated quarterly and annual doses resulting from liquid effluents to members of the public are well below all dose limit criteria.

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IH. Method for Calculating the Gamma and Beta Air Doses from Noble Gases Gamma and beta air doses due to noble gases in gaseous effluents are calculated for several receptor locations when noble gases are recorded in effluents. Those locations include the points of estimated'highest off-site ground level air concentration of radioactive material, site boundary (or closest point on the opposite shoreline in directions which are bordered by the tidal marsh), nearest resident, nearest vegetable garden, and nearest milk animal within five miles for each of the sixteen principle compass directions. The special on-site receptor locations (Science and Nature Center and the "Rocks")

are also included.

Atmospheric dispersion factors (i.e., X/Q factors) calculated from recorded concurrent site meteorological data (i.e., meteorologicaldata measurements taken during the time of the release) are used in the estimation of receptor specific air concentrations due to station effluents. The atmospheric dispersion estimations utilize methodology generally consistent with US NRC Regulatory Guide 1.111 (Reference 4).

Beta air doses use undepleted X/Q's and assumes a semi-infinite plume at the point of exposure. Gamma air doses are calculated using the finite cloud model presented in "Meteorology and Atomic Energy -

1968" (Reference 5). That model is implemented through the definition of an effective gamma atmospheric dispersion factor [X/Q'] (Reference 6) and the replacement of the undepleted X/Q in the infinite cloud dose equation by [X/Q'].

The release point of effluents is also considered in the atmospheric dispersion calculation. The primary vent stack is treated as a "mixed-mode" release, as defined in Regulatory Guide 1.111. These effluents are considered to be part-time ground level / part-time elevated releases depending on the ratio of primary vent stack exit velocity relative to the speed of prevailing wind. All other release points (e.g.,

Turbine Building and Chemistry lab hoods) are considered ground-level releases. The beta air and gamma air dose calculations are consistent with the models presented in Regulatory Guide 1.109 (Reference 1).

The values for the dose factors, DFiJ and DFi*, have been taken from Table B- I in Regulatory Guide 1.109.

Table A presents the calculated maximum off-site gamma air and beta air doses for each calendar quarter and year. The calculated annual doses as a percent of the applicable regulatory limit are shown in Table C. The estimated quarterly and annual air doses resulting from noble gas effluents are well below all dose limit criteria.

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IV. Method for Calculating the Critical Organ Dose Resulting from lodines, Tritium and Particulates with T 1/2 Greater than 8 Days in Gaseous Releases Regulatory Guide 1.109 dose models are applied in the calculation of the critical organ doses from iodine, tritium and particulate radionuclides released into the atmosphere during reporting period. Atmospheric dispersion and deposition factors (i.e., depleted X/Q and D/Q factors) calculated with concurrent meteorological data (i.e., meteorological data measurements taken during the time of the release) are used in the determination of gaseous pathway doses. The dispersion models are described in Section B.7.3.2 &

B.7.3.3 of the Seabrook ODCM.

Potential exposure pathways associated with gaseous effluent are (i) external irradiation from radioactivity deposited on the ground surface, (ii) inhalation, and (iii) ingestion of vegetables (both fresh leafy and stored), meat, and milk. Dose estimates were determined for the site boundary and for the locations of the nearest resident, vegetable garden, and milk animal in each of the sixteen principle compass directions.

The locations of the nearest resident, vegetable garden and milk animal in each sector were identified by the 2009 Annual Land Use Census as required by ODCM Control C.9.2.1 (see Table F). Additionally, doses were calculated at the point of approximate maximum ground level air concentration of radioactive materials in gaseous effluent. Conservatism in the dose estimates was maintained by assuming that the vegetable garden pathway was active at each milk animal location. Though not required to be part of the land use census, meat animal (cattle) locations are included in the assessment when identified. Meat and milk animals were assumed to receive their entire intake from pasture during the second and third quarters.

This is a conservative assumption because most dairy operations utilize supplemental feeding when animals are on pasture, or actually restrict animals to full time silage feeding throughout the entire year.

Table E provides the reference sources for dose model parameter assumptions used in the dose assessment.

The maximum organ doses were determined by summing the contributions from all exposure pathways at each location, and sorting in descending order. Doses were calculated for the whole body, GI-LLI, bone, liver, kidney, thyroid, lung, and skin for adults, teenagers, children, and infants. The estimated quarterly and annual organ doses due to iodine, tritium and particulates at the location of the maximally exposed individual are reported in Table A.

The estimated organ doses from iodine, tritium and particulates in gaseous effluents are well below the 10CFR50, Appendix I dose criteria for the reporting period (See Table C for calculated dose as a percentage of annual limits).

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V. Total Dose (40 CFR Part 190) 40 CFR 190 states that the annual dose equivalent should not exceed 25 mrem to the whole body, 75 mrem to the Thyroid, or 25 mrem to any other organ of any Member of the Public from all uranium fuel cycle sources. To show compliance with this standard, the maximum doses for both the liquid and gaseous pathways from Seabrook Station are added together with the whole body dose from noble gas releases and any direct radiation component attributed to station fixed sources to the maximum receptor location. This includes the addition of spent fuel storage in a new Dry Fuel Storage (DFS) facility that began operations in July 2008 with the first transfer of spent fuel assemblies into storage arrays. The DFS is located on Seabrook Station property approximately 0.38 miles West-Southwest of the Unit 1 Containment Building.

Since there are no other uranium fuel cycle facilities within five miles of Seabrook Station, no additional impacts from sources beyond Seabrook Station need be considered.

The sum of the maximum annual whole body doses to Members of the Public from all exposure pathways for liquid and gaseous effluents, plus the direct external dose from plant and dry fuel storage fixed sources, was 2.58E-02 mrem to a hypothetical individual at or beyond the site boundary. The maximum organ dose (including the thyroid) to any age group from all exposure pathways including direct radiation was 2.62E-02 mrem.

Table B illustrates the total dose projections from all station sources to the maximum potential off-site individual for the year 2009 and demonstrates compliance with the EPA's environmental radiation standard for the uranium fuel cycle per 40 CFR Part 190 (See Table C for total dose as a percentage of annual limit).

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VI. References

1. Regulatory Guide 1.109, Revision 1,"Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purposes of Evaluating Compliance with 10CFR Part 50, Appendix I", USNRC, October 1977.
2. Program Manual: Offsite Dose Calculation Manual (ODCM), Revision 33, Seabrook Station, NextEra Energy Seabrook.
3. Kocher, D.C., Dose-Rate Conversion Factors for Exposure to Photons and Electrons, Health Physics, Vol. 45, No. 3, Sept. 1983.
4. Regulatory Guide 1.111, Revision 1, "Method for Estimating Atmospheric Transport and Dispersion of Gaseous Effluents in Routine Releases from Light-Water Cooled Reactors",

USNRC, July 1977.

5. Slade, D.H., "Meteorology and Atomic Energy - 1968", USAEC, July 1968.
6. Hamawi, J.N., "AEOLUS-2 A computer Code for the Determination of Continuous and Intermittent-Release Atmospheric Dispersion and Deposition of Nuclear Power Plant Effluents in Open-Terrain Sites, Coastal Sites, and Deep-River Valleys for the Assessment of Ensuing Doses and Finite-Cloud Gamma Radiation Exposures", Entech Engineering, Inc., March 1988.

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Table A Seabrook Station 2009 Annual Radioactive Effluent Release Report Maximum(a) Off-Site Doses and Dose Commitments to Members of the Public Dose (mrem)(b)

Release Type 1st 2nd 3rd 4th Year(c)

Quarter Quarter Quarter Quarter 2009 Liquid Effluents:

Total Body Dose 3.07E-05 8.65E-06 2.8 1E-04 4.97E-04 8.17E-04 (1) (2) (2) (2)

Organ Dose 1.20E-04 1.29E-05 3.23E-04 6.50E-04 1.11E-03 (3) (4) (5) (4)

Airborne Effluents:

Organ Dose firom Iodines, 3.52E-03 2.62E-03 3.25E-03 1.57E-02 2.5 1E-02 Tritium, and Particulates (6) (7) (7) (8)

Noble Gases Beta Air 1.54E-05 1.30E-06 2.82E-06 5.16E-06 2.47E-05 (mrad) (9) (10) (11) (12)

Gamma Air 4.06E-05 6.05E-06 5.77E-06 9.95E-06 6.24E-05 (mrad) (13) (10) (11) (12)

Direct Dose Offsite From 0 Station Operation(e)

Doses (mrem) at Receptor Locations Inside Site Boundary(d):

Science and Nature Center (SW, 488m): 6.38E-07 1.99E-06 2.46E-06 1.21E-05 1.72E-05 Organ Dose (mrem) (dl) (dl) (dl) (d2)

The "Rocks" (NE/ENE, 244m): 1.03E-04 5.46E-05 8.28E-05 4.18E-04 6.59E-04 Organ Dose (mrem) (dl) (dl) (dl) (d2) 8

Table A (continued)

Seabrook Station 2009 Annual Radioactive Effluent Release Report NOTES: Maximum(a) Off-Site Doses and Dose Commitments to Members of the Public (a) "Maximum means the largest fraction of corresponding 10CFR50, Appendix I, dose design objective.

(b) The numbered footnotes indicate the age group, organ, and location (compass sector and distance from the primary vent in meters) of the dose receptor, where appropriate.

(1) Child (2) Adult (3) Bone of a child.

(4) GI-LLI of an adult.

(5) Liver of an adult.

(6) Liver, kidney, lung, GI-LLI, thyroid, and whole body of a child, SE 2357 m.

(7) Liver, kidney, lung, GI-LLI, thyroid, and whole body of a child, SW 1130 m.

(8) Thyroid of a child, SW 1130 m.

(9) WNW 930 m (10) WSW 1022 m (11) ESE 2276 m (12) SSE 914 m (13) NW914 m (c) "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 10CFR50.

(d) For each special receptor location, the whole body and organ doses calculated for the airborne effluent releases were adjusted by the occupancy factor provided in Seabrook's ODCM (i.e.,

0.0014 for the Science and Nature Center and 0.0076 for the "Rocks"). It should also be noted that for 2009 actual occupancy factors were much lower (close to zero) since access to the site by the general public has been greatly restricted for security reasons following the terrorist attacks on America on 09/11/01. For conservatism, the previous factors as listed in the ODCM were applied for an estimate of upper bound doses and comparison with calculated impacts for year's pre September 11, 2001. Where appropriate, the numbered footnotes indicate the organ and age group of the dose receptor:

(d 1) Liver, kidney, lung, GI-LLI, thyroid, and whole body of a teen.

(d2) Lung of a teen.

(e) Only station sources (both plant and dry fuel storage) are considered since there are no other fuel cycle facilities within five miles of Seabrook Station site. 2009 data for the closest off-site environmental TLD locations in each sector (as listed in Tables B.4-1 and B.4-2 of Seabrook's ODCM) were compared to preoperational data for the same locations. No statistical difference, which could be attributed to station sources, was identified.

9

Table B Seabrook Station 2009 Annual Radioactive Effluent Release Report Total Dose to Maximum Off-Site Individual (40CFR190)

Release Source Total Body Maximum Organ(a)

(mrem) (mrem)

Liquids 8.17E-04 1.11E-03 Noble Gases 4.15E-05 4.15E-05 Gas lodines, Tritium & 2.50E02 2.51E-02 Particulates 2.50E-02_2.51E-02 Direct Radiation 0 0 Annual Total 2.58E-02 2.62E-02 (a) Maximum organ includes consideration of the thyroid.

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Table C Seabrook Station 2009 Annual Radioactive Effluent Release Report Calculated 2009 Maximum Doses versus Applicable Limits Applicable ODCM Calculated Percent ODCM Annual Annual (2009) of Receptor Control Limit Dose Limit Offsite Liquid Effluents Whole Body Dose C.6.2.1 3 mrem 8.17E-04 mrem 0.027%

Organ Dose C.6.2.1 10 mrem 1.11E-03 mrem 0.011%

Airborne Effluents Organ Dose (iodine, tritium, and part.) C.7.3.1 15 mrem 2.5 1E-02 mrem 0.167%

Gamma Air Dose (noble gases) C.7.2.1 10 mrad 6.24E-05 mrad 0.0006%

Beta Air Dose (noble gases) C.7.2.1 20 mrad 2.47E-05 mrad 0.00012%

All Station Sources (a)

Whole Body Dose C.8.1.1 25 mrem 2.58E-02 rnrem 0.10%

Organ Dose C.8.1.1 25 mrem 2.62E-02 mrrem 0.10%

Onsite (Science and Nature Center,' 488m SW)

Airborne Effluents Organ Dose (iodine, tritium, and part.) C. 7 .3 .1(b) 15 mrem 1.72E-05 mrem 0.00011%

Onsite (The "Rocks", 244m NE/ENE)

Airborne Effluents Organ Dose (iodine, tritium, and part.) C. 7 .3 .1(b) 15 mrem 6.59E-04 mrem 0.0044%

(a) The "all station sources" doses are the sum of the whole body doses and maximum organ doses from liquid, noble gas, and iodine/tritium/particulate releases as well as direct radiation from fixed station sources (both plant facilities and dry fuel storage).

(b) ODCM Part A, Section 10.2 states that the annual effluent report shall include an assessment of the radiation doses from radioactive liquids and gaseous effluents to members of the public due to their activities inside the site boundary during the report period. The referenced limits (C.7.2.1 & C.7.3.1) are the acceptable doses from liquid and gaseous effluents to areas at and beyond the site boundary and are considered to be appropriate for comparison purposes.

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Table D Seabrook Station 2009 Annual Radioactive Effluent Release Report Sources of the Values of Factors Used in Liquid Dose Equations Factor Definition Source Uap Usage factor Table B.7-1, Station ODCM MP Mixing ratio Section B.7.1, Station ODCM (value=0.1 for aquatic foods and 0.025 for shoreline)

Bip Equilibrium bioaccumulation factor Table A-i, Reg. Guide 1.109 Daipi Dose factor Tables E-1 1 through E-14, R.G. 1.109 Nuclide transit time Table E-15, Reg. Guide 1.109 Transfer coefficient from water to Reg. Guide 1.109 sediment Period of activity buildup in sediment Table B.7-2, Station ODCM tb or soil Shoreline width factor Table A-2, Reg. Guide 1.109 (value 0.5) 12

Table E Seabrook Station 2009 Annual Radioactive Effluent Release Report Sources of Values for the Factors Used in Dose Equations for Gaseous Releases Factor Definition Source Period of activity buildup in sediment Table B.7-2, Station ODCM tb or soil Nuclide decay constant Kocher (Reference 3)

DFGij Ground plane dose factor Table E-6, Reg. Guide 1.109

[X/Q]D Atmospheric dispersion factor Calculated following Reg. Guide 1.111 Ra Breathing rate Table B.7-3, Station ODCM DFAija Inhalation dose factor Tables E-7 through E-10, Reg. Guide 1.109 di Nuclide deposition rate Reg. Guide 1.109 pSoil surface density Table B.7-2, Station ODCM Crop, leafy vegetable, or pasture Table B.7-2, Station ODCM grass exposure period Average time from crop harvest to Table B.7-2, Station ODCM th consumption Yv Agricultural productivity by unit area Table B.7-2, Station ODCM Fraction of deposited activity r retained on crops, leafy vegetables, or Table E-15, Reg. Guide 1.109 pasture grass Stable element transfer coefficient from soil to produce, leafy vegetable, Table E-1, Reg. Guide 1.109 or pasture grass Fractional equilibrium ratio Reg. Guide 1.109 H Ambient absolute humidity Table B.7-2, Station ODCM Stable element transfer coefficient Fm from feed to milk Tables E- 1 and E-2, Reg. Guide 1.109 13

Table E (continued)

Seabrook Station 2009 Annual Radioactive Effluent Release Report Sources of Values for the Factors Used in Dose Equations forGaseous Releases Factor Definition T Source tf Average time from feed to milk to consumption Reg. Guide 1.109 fp Fraction of the year that animals Table B.7-2, Station ODCM graze on pasture Fraction daily feed pasture grass Table B.7-2, Station ODCM Ff Stablefeed from element transfer coefficient to meat Table E-1, Reg. Guide 1.109 Average slaughtertime from meat animal to consumption Table E- 15, Reg. Guide 1.109 DFIija Ingestion dose factor Tables F- 1 through E-14, R.G.1.109 Uv Annual intake of produce Table B.7-3, Station ODCM UM Annual intake of milk Table B.7-3, Station ODCM a Annual intake of meat Table B.7-3, Station ODCM F Annual intake of leafy vegetables Table B.7-3, Station ODCM Ingestion rate fractions for garden fg produce Reg. Guide 1.109 f, Ingestion rate fractions for garden Reg. Guide 1.109 leafy vegetables Reg._Guide_1.109 Rate constant for activity removal XIw from plant and leaf surfaces by Table E- 15, Reg. Guide 1.109 weathering QF Animal consumption rate Table E-3, Reg. Guide 1.109 14

Table F Seabrook Station 2009 Annual Radioactive Effluent Release Report Recentor Locations* for Seabrook Station Milk Animals Nearest Nearest within 5 Mile Resident Garden Radius Sector mile (km) mile (km) mile (km)

N 2.20 (3.55) 2.47 (3.97)

NNE 1.89 (3.04) 1.99 (3.21)

NE 1.82 (2.92) 2.61 (4.20)

ENE 1.44 (2.31)

E 1.59 (2.56)

ESE 1.70 (2.73)

SE 1.46 (2.36) 2.60 (4.18)

SSE 1.02 (1.65)

S 0.75 (1.21) 0.76 (1.22)

SSW 0.69(l.12) 0.76 (1.22)

SW 0.70 (1.13) 0.97 (1.56)

WSW 1.16 (1.87) 1.43 (2.31)

W 0.82 (1.32) 0.99 (1.59)

WNW 0.69(1.11) 0.94 (1.52)

NW 0.76 (1.22) 0.79 (1.27) 4.30 (6.93)

NNW 0.64 (L04) 0.64 (1.04) 3.30 (5.32)**

  • Locations based on 2009 Land Use Census.
    • Milk farm reported to have gone out of business in September, 2009 15
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