ML091330635

Enclosure 1 to SBK-L-09091 - Effluent Release Data as Required by Regulatory Guide 1.21

ML091330635
Person / Time
Site:	Seabrook
Issue date:	04/29/2009
From:	NextEra Energy Seabrook
To:	Office of Nuclear Reactor Regulation
References
RG-1.021, SBK-L-09091
Download: ML091330635 (55)

Text

ENCLOSURE 1 TO SBK-L-09091 Effluent Release Data as Required by Regulatory Guide 1.21

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT Supplemental Information 2008 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 quarter total body.

b. 5.0 mrem per quarter any organ.

c. 2.OE-04 pýCi/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. Jodines: 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: 165

b. Total time for batch releases: 33812 minutes

c. Maximum time period for batch release: 1061 minutes

d. Average time period for batch release: 205 minutes

e. Minimum time period for batch release: 11 minutes

f. Average stream flow during periods of release of effluents into a flowing stream: 1.69E+06 liters per minute B. Gaseous

a. Number of batch releases: 58

b. Total time for batch releases: 65457 minutes

c. Maximum time period for batch release: 11237 minutes

d. Average time period for batch release: 1189 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 2B EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2008 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 ND ND ND ND iodine-131 Ci ND ND ND ND iodine-133 Ci ND 4.55E-06 ND ND cobalt-57 Ci 2.94E-06 ND 3.51 E-06 1.48E-06 cobalt-58 Ci 1.60E-03 2.91E-03 1.21 E-03 3.75E-04 cobalt-60 Ci 7.45E-04 2.31 E-04 2.49E-04 1.30E-04 chromium-51 Ci ND 3.90E-04 1.75E-05 ND iron-55 Ci 5.18E-03 4.04E-03 2.63E-03 1.53E-03 iron-59 Ci 5.74E-06 3.20E-05 2.49E-05 ND zinc-65 Ci ND ND ND ND manganese-54 Ci 4.73E-05 8.25E-05 1.01 E-04 1.99E-06 zirconium-niobiu m-95 Ci ND 9.30E-05 4.15E-05 ND molybdenum-99 Ci ND ND ND ND technetium-99m Ci ND ND ND ND silver-111Omr Ci NDý-- - ND ND' -- ND-barium-lanthanum-140 Ci ND ND ND ND cerium-141 Ci ND ND ND ND antimony-124 Ci ND 3.24E-06 ND ND antimony-125 Ci 1.25E-03 1.04E-04 9.O0E-04 1.61 E-05 antimony-126 Ci ND ND ND ND niobium-97 Ci ND ND ND ND tin-117m Ci ND 1.61E-05 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) Ici 8.83E-03 7.91E-03 5.18E-031 2.05E-03 xenon-133 Ci ND ND ND ND:

xenon-135 Ci ND ND ND ND

TABLE 2B EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2008 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 3.37E-06 ND ND cobalt-58 Ci 2.59E-06 1.23E-04 ND ND cobalt-60 Ci 6.86E-07 ND ND ND 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

.- ,o!ybdenum-99 ..- .i ND ND N - 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 3.28E-06 J 1.26E-04 O.OOE+00 J O.OOE+OO xenon-131m

• Ci ND ND ND ND xenon-1 33m Ci ND ND ND ND xenon-133 Ci ND ND ND ND xenon-135 Ci ND ND ND ND Total

TABLE 2A EFFLUENT AND WASTE DISPOSAL ANNUAL ,REPORT ,2008 LIQUID EFFLUENTS-SUMMATION OF ALL RELEASES.

I Unit IQuarter 1 Quarter 2 Quarter 3 QuarteIr 4 ErtTroral A. Fission and activation products'

1. Total releases Ci 8.83E-03 8.32E-03 5.18E-03 2.05E-03 6.00E+00

2. Average diluted duvrige concentration del dcuCi/ml 2.12E-11 2.46E-11 1.12E-11 4.36E-12 durina period

3. Percent of applicable limit  % 2.56E-02 3.49E-02 5.27E-03 2.09E-03 B. Tritium

1. Total release Ci 8.83E-02 1.47E+02 5.32E+01 2.11E+01 8.00E+00

2. Average diluted concentration uCi/ml 2.12E-10 4.35E-07 1.15E-07 4.49E-08 durine period

3. Percent of applicable limit  % 1.54E-02 7.16E-02 9.24E-03 2.40E-03 C. Dissolved and entrained gases

1. Total release Ci ND ND ND ND

2. Average diluted concentration uci/mi N/A N/A N/A N/A durinq period

3. Percent of applicable limit . - . _N/IA N/Ao N/_I  :;.N/A D. Gross alpha radioactivity

1. Total release ci ND ND ND ND 1.OOE+01

TABLE IC EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

GASEOUS EFFLUENTS-GROUND LEVEL RELEASES CONTINUOUS Nuclides Released Unit Quarter Quarter Quarter3 Quarter

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 O.OOE+00 O.OOE+00 O.OOE+00 0.00E+00

2. Iodines iodine-131 Ci ND ND ND ND iodine-1 33 Ci ND ND ND ND Ci Total for period Ci O.OOE+00 O.OOE+00 0.OOE+00 O.OOE+00

3. Particulates strontium-89.. . ,Ci ND_ýý 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 3.72E-07 ND ND cobalt-60 Ci ND ND ND ND chromium-51 Ci ND ND ND ND unidentified Ci ND ND ND ND Total for period Ci O.QQE+00 3.72E-07 O.OOE+00 O.OOE+00

TABLE IC EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

GASEOUS EFFLUENTS-GROUND LEVEL RELEASES BATCH Nuclides Released Unit Quarter Quarter Quarter Quarter

1. Fission and activation gases argon-41 Ci" 3.58E-05 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 1.93E-06 ND ND ND xenon-135m Ci ND ND ND ND xenon-1 38 Ci ND ND ND ND Ci Ci unidentified Ci ND ND ND ND Total for period Ci 3.77E-05 O.OOE+00 O.OOE+00 0.00E+OO

2. lodines iodine-131 Ci 5.85E-10 ND ND ND iodine-1 32 Ci ND ND ND ND iodine-133 Ci 4.56E-09 ND ND 4.89E-10 iodine-135 Ci ND ND ND ND TotaItfor, period.-. Ci .... 15E-09, ,0:00E+00 0.00E+00. A.89E-10 3.- Particulates strontium-89 Ci ND ND ND ND strontium-90 Ci ND ND ND ND cesium-1 34 Ci ND NDý 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 1.95E-06 ND ND cobalt-60 Ci ND 1.43E-08 ND ND manganese-54 Ci ND ND ND .ND iron-59 Ci ND ND ND ND niobium/zirconium-95 Ci ND 4.22E-08 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 2.01 E-06 0.OOE+00 0.OOE+00

TABLE 1B EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

GASEOUS EFFLUENTS-ELEVATED RELEASES CONTINUOUS Nuclides Released IUnit I1 Quarter Quarter 2

QuarterrQuarter 3 14

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 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00

2. Iodines

___liodine-131. - " Ci * .. ND .. ND- ND - ND, Fiodine-135 Iiodine-1 33 Total for period I

I Ci Ci Ci I ND ND I ND ND I ND ND I

I0.00E+001 0.00E+001 0.00E+001 0.00E+00 ND ND I

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 Total for period Ci O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+00

TABLE 1B EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2008)

GASEOUS EFFLUENTS-ELEVATED RELEASES BATCH NuclesReleased Unt OQuarter Quarter Quarter Quarter Nucids elasd ni 2 3 4

1. Fission and activation gases argon-41 Ci 8.07E-03 1.13E-01 2.01E-03 2.08E-03 krypton-85 Ci ND ND ND 2.56E-02 krypton-85m Ci ND ND ND ND krypton-87 Ci ND ND ND 2.27E-04 krypton-88 Ci ND ND ND ND xenon-131m Ci ND ND ND ND xenon-133 Ci 6.45E-03 ND ND 2.44E-04 xenon-133m Ci ND 9.41E-02 ND ND xenon-135 Ci 2.65E-04 ND 5.12E-05 1.63E-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 1.48E-02 2.07E-01 2.06E-03 2.83E-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 O.OOE+00 O.OOE+00 O.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-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 O.OOE+00 O.OOE+00 O.OOE+00 O.OOE+OO

TABLE 1A EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2008 GASEOUS EFFLUENTS-SUMMATION OF ALL RELEASES Unit A o a1 Quarter Quarter 2

Quarter 3

I Quarter 4.oError, Est. Total A. Fission and activation gases '

1. Total releases Ci 2._Averag rele. _ _ _ _ _ _ _ _ 1.48E-02 2.07E-01 2.06E-03 2.83E-02 1.70E+01

2. Average release rate uCi/sec" for period 1.90E-03 2.63E-02 2.59E-04 3.56E-03

3. Percent of applicable Technical Specification  %

limit 3.24E-04 2.62E-03 8.64E-05 5.64E-05 B. lodines

1. Total release Ci 5.15E-03 ND ND 4.89E-10 1.50E+01

2. Average release rate ucisec for period 6.53E-04 N/A N/A 6.20E-1 1

3. Percent of applicable Technical Specification  %

limit 1.53E-01 N/A N/A 4.64E-01 C. Particulates

1. "

i~tiees iND -[2.21 E-06 J ND I ND 1.8~0E+0

2. Average release rate for period uCi/sec N/A 2.80E-07 N/A N/A

3. Percent of applicable

.Technical Specification, ..... ....... _ .  %.

limit N02- 3 _ _ _

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

1. Total release Ci 1.11 E+01 2.79E+01 2.28E+01 I 3.42E+01 1.60E+01

2. Average release rate for period uCi/sec 1.43E+00 3.55E+00 2.87E+00 4.30E+00

3. Percent of applicable limit

• Specficaionj 1.52E-01 3.83E-01 3.61E-01 4.63E-01

2008 Ground Water Monitoring Well Tritium Data Well ID. Jan-08 Feb-08 Mar-08 Apr-08 May-08 Jun-08 Jul-08 Aug-08 Sep-08 Oct-08 Nov-08 Dec-08 (uCi/mL) (uCi/mL) (uCi/mL) (uCi/mL) (uCi/mL) (uCi/mL) (uCi/mL) (uCi/mL) (ui/mL) (ui/mL) (uCi/mL) (uCi/mL)

BD-1 < 5.74E-07 < 6.06E-07 BD-2 < 6.08E-07 < 5.87E-07 < 5.70E-07 < 5.72E-07 < 6.OOE-07 BD-3 < 5.98E-07 < 6.10E-07 BD-4 < 5.73E-07 < 6.04E-07 BD-5 < 5.96E-07 < 6.17E-07 SC-1 < 5.98E-07 < 6.06E-07 SD-1 < 5.70E-07 < 6.04E-07 SD-2 < 5.70E-07 < 6.OOE-07 < 6.09E-07 < 5.70E-07 < 6.03E-07 SD-3 < 5.98E-071 < 6.03E-07 SD-4 < 5.97E-07 <6.OOE-07 SW-1 1.90E-06 2.24E-06 2.43E-06 1.68E-06 1.49E-06 1.50E-06 1.27E-06 SW-2 < 5.76E-07 SW-3 < 5.64E-07 < 5.96E-07 < 5.86E-07 < 5.70E-07 < 5.76E-07 < 6.24E-07 BU-1 < 5.77E-07 I < 6.26E-07 SU-1 < 5.96E-07 SB-12 BU-10 < 5.92E-07 < 5.90E-07 SU-10 < 5.84E-07 < 6.OOE-07 BU-11 < 5.79E-07 < 5.96E-07 SU-11 < 5.80E-07 < 6.06E-07 Wells ND-10 renumbered to BU-10 ND-15 renumbered to SU-15 ND-20 renumbered to BU-11 ND-10 renumbered to BU-10

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 2008 SOLID WASTE AND IRRADIATED FUEL SHIPMENTS A. SOLID WASTE SHIPPED OFFSITE FOR BURIAL OR DISPOSAL (Not irradiated fuel) 1 year Est. Total

1. Type of waste Unit PeriodPeriodError, Errorl

a. Spent resins, filter sludges, evaporator MT 1.63E+01 2.50E+01 Bottoms, etc. Ci 2.27E+02

b. Dry compressible waste, contaminated 6.63E+01 2.50E-O1 Equip, etc. Ci 7.47E+00 N/A

c. Irradiated components, control N/A N/A Rods, etc. Ci

d. Other (describe): Cartridge Filters m' 3.21E+00 Ci 2.05E+02 2.50E+01

2. Estimate of major nuclide composition (by type of waste)

a. Ni-63 7.22E+O 1 Fe-55  % 1.34E+01 Co-60  % 6.69E+00 Co-58  % 4.30E+00 Mn-54  % 1.38E+00 Cs-137  % 8.75E-01 Sb-125  % 5.52E-01 Co-57  % 3.24E-01 H-3  % 1.57E-01 Cs-134  % 1.25E-01 Nb-94  % 4.79E-03 Sr-90  % 3.59E-03

b. Fe-55  % 5.31E+O I Ni-63  % 3.18E+01 Co-60  % 9.50E+00 Tc-99  % 2.16E+00 Co-58  % 1.80E+00 Mn-54  % 4.89E-01

• Cs-137  % 4.05E-01 Sb-125  % 2.40E-01 1-129  % 1.46E-01 Co-57  % 1.42E-01 Cs-134  % 5.47E-02 H-3  % 4.87E-02 Zr-95  % 2.47E-02 C-14  % 1. 16E-02 Nb-95  % 9.47E-03 Nb-94 3.77E-03 C. N/A I% N/A

d. Fe-55 4.87E+01 Ni-63  % 3.02E+O1 C0o-60  % 9.93E+00 Co-58  % 9.39E+00 Mn-54  % 1.02E+00 Co-57  % 2.55E-01 Cs-137  % 1.63E-01 Zr-95  % 1.25E-01 Tc-99  % 1.07E-01 Nb-95  % 4.81E-02 C-14  % 3.18E-02 Sb-125  % 8.89E-03 1-129  % 6.50E-03 Zn-65  % 5.72E-03 Ni-59  % 5.67E-03

3. Solid Waste Disposition Number of Waste Container Solidification Mode of Destination Shipments Class Type Agent Transportation 6 A General Design N/A Truck Duratek, Oak Ridge, TN

.4 A General Design N/A Truck ES, Clive, UT 3 A General Design N/A Truck ES, Oak Ridge, TN 2 A General Design N/A Truck Duratek, Kingston, TN 1 B General Design N/A Truck Studsvik, Erwin, TN 1 C General Design N/A Truck Studsvik, Erwin, TN 1 C Type A N/A Truck Studsvik, Erwin, TN "1 C Type A N/A Truck CNS, Barnwell, SC 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: 4 (O Reviewed By: Date: "I 0- .

6062 Approved By: Date: O9 02-8-O

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 2008, as described below.

• Corrected the ten times ECL limit wording in A.4, Section C.6. 1.1 to agree with Section A.6-1.

• Added Section C.9.4.1 to A.4 for Dry Fuel Storage Monitoring Program.

• Removed TS-142 from C.5.1 Bases, as the wording was previously incorporated, and added clarification information for steam generator drains directly to Circ. Water as described in the UFSAR section 10.4.8.1.

In C.5.1 ACTION STATEMENT 32, Removed "the" for readability (corrected typo).

In C.5.2 Bases:

o clarified the WRGM sample pump (RM-P-240-1, and 2) required action statement information for out of service conditions, throughout the bases, o removed redundant information concerning RM-6505 out of service tracking, o clarified wording for bases for C.5.2 Action b with respect to RM-6503 and 6504 to agree the actual wording in C.5.2 ACTION b. and clarified RM-6503 may be used in place of taking grab samples and is not to be used in place of RM-6504.

In C.5.2 ACTION STATEMENT 33, removed "See bases for reporting requirements" as wording does not apply.

In C.5.2 ACTION STATEMENT 36, changed temperature requirement to be "greater than or equal to" which agrees with the bases.

In Table A.6.1-1, 1):

o clarified the sample and analysis requirements for steam generator discharges based on discharge type (batch or continuous),

o added Storm Drains sample and analysis requirements, o added note 13 to describe how Storm Drains are used and monitored,

o clarified note 2 concerning interrupting and reinitiating a batch release from the same source is allowed provided the input remained isolated such that the tank contents were unaffected, o clarified note 6 for S/G discharges based on plant Modes, o clarified notes 7, 9, 11 to exclude natural radioactivity, and o throughout table made note items superscripts for consistency

• Corrected 10 CFR Part 20 reference from .405 to .2203 (a)(4) in Section C.8.1.1

• Added Dry Fuel Storage and clarified the site description in Section S.8.1.2.

• Added Dry Fuel Storage to Section C.8.1 Bases.

• In Section C.9.4, Added a new section to address the Dry Fuel Storage Facility with the associated controls, surveillance requirements and bases to ensure compliance with 10 CFR 72.104 (a), 40 CFR 190, 10 CFR 20.1301 (a)(1) for the portion associated with the Dry Fuel Storage Facility.

• Added new Table A.9.4-1 for Dry Fuel Storage Environmental Monitoring.

• In Part B, Section 2.0, added "ten" to the total ECL fraction in liquid pathways allowed by 10 CFR Part 20 (corrected typo).

In Part B, Section 3.1, clarified 10 CFR Part 20 Table 2 instead of"II" and deleted old reference to 10 CFR 20.106(a).

In Part B, Section 3.10 and 3.12, added Dry Fuel Storage to the Direct Dose Calculation Methodology.

In Part B, Sections 4.0 and 4.1, added Dry Fuel Storage to the Radiological Environmental Monitoring Program. Separated the plant operation monitoring program from the dry fuel storage monitoring program (new Section 4.2).

In Table B.4-1 and Figure B.4-3, Deleted milk sample location TM-23 as it is no longer available.

In Table B.4-1, corrected minor distance values for TG-09 and TL-5, and added notations for operating plant locations that are shared with Dry Fuel Storage.

Added new Table B.4-2 and Figure B.4-7 for Dry Fuel Storage Facility TLD locations.

Updated Figure B.4-4 with Dry Fuel Storage Facility and TLD locations.

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 2008.

Cý

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 accordance with Tech. Spec. 6.8.1.4.

Response: From January 1, 2008 to December 31, 2008, 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 6.14.1a requires that licensee initiated changes to the Radwaste Treatment Systems (liquid, gaseous, andsolid) be submitted to the Commission in the Annual Radioactive Effluent Release Report for the period in which the change was made.

Response: For 2008, FPL 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.

• 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, 2008 to December 31, 2008 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.

ENCLOSURE 2 TO SBK-L-09091 Joint Frequency Distributions of Wind Speed, Wind Direction and Atmospheric Stability

SEABROOK JAN08-DEC08 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS A CLASS FREQUENCY (PERCENT) = 2.42 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 1 0 0 0 0 0 0 1 0 0 0 0 0 0 3 (1) .00 .00 .48 .48 .00 .00 .00 .00 .00 .00 .48 .00 .00 .00 .00 .00 .00 1.44 (2) .00 .00 .01 .01 .00 .00 .00 .00 .00 .00 .01 .00 .00 .00 .00 .00 .00 .03 4-7 0 0 0 0 5 2 7 0 1 0 1 1 2 0 0 1 0 20 (1) .00 .00 .00 .00 2.39 .96 3.35 .00 .48 .00 .48 .48 .96 .00 .00 .48 .00 9.57 (2) .00 .00 .00 .00 .06 .02 .08 .00 .01 .00 .01 .01 .02 .00 .00 .01 .00 .23 8-12 1 0 0 6 15 16 29 20 1 0 4 13 11 13 5 1 0 135 (1) .48 .00 .00 2.87 7.18 7.66 13.88 9.57 .48 .00 1.91 6.22 5.26 6.22 2.39 .48 .00 64.59 (2) .01 .00 .00 .07 .17 .19 .34 .23 .01 .00 .05 .15 .13 .15 .06 .01 .00 1.56 13-18 0 0 1 4 0 4 0 1 4 5 9 4 8 5 3 0 0 48 (1) .00 .00 .48 1.91 .00 1.91 .00 .48 1.91 2.39 4.31 1.91 3.83 2.39 1.44 .00 .00 22.97 (2) .00 .00 .01 .05 .00 .05 .00 .01 .05 .06 .10 .05 .09 .06 .03 .00 .00 .56 19-24 0 0 0 1 1 0 0 0 0 0 0 0 0 0 1 0 0 3 (1) .00 .00 .00 .48 .48 .00 .00 .00 .00 .00 .00 .00 .00 .00 .48 .00 .00 1.44 (2) .00 .00 .00 .01 .01 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .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 1 0 2 12 21 22 36 21 6 5 15 18 21 18 9 2 0 209 (1) .48 .00 .96 5.74 10.05 10.53 17.22 10.05 2.87 2.39 7.18 8.61 10.05 8.61 4.31 .96 .00 100.00 (2) .01 .00 .02 .14 .24 .2S .42 .24 .07 .06 .17 .21 .24 .21 .10 .02 .00 2.42 (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)

SEAB8OOK JAN08-DEC08 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS B CLASS FREQUENCY (PERCENT) = 3.65 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 0 0 1 1 0 0 0 0 0 0 0 1 0 0 0 3 (1) .00 .00 .00 .00 .32 .32 .00 .00 .00 .00 .00 .00 .00 .32 .00 .00 .00 .95 (2) .00 .00 .00 .00 .01 .01 .00 .00 .00 .00 .00 .00 .00 .01 .00 .00 .00 .03 4-7 1 0 0 3 4 7 9 1 2 1 5 8 12 6 2 3 0 64 (1) .32 .00 .00 .95 1.27 2.22 2.85 .32 .63 .32 1.58 2.53 3.80 1.90 .63 .95 .00 20.25 (2) .01 .00 .00 .03 .05 .08 .10 .01 .02 .01 .06 .09 .14 .07 .02 .03 .00 .74 8-12 6 1 1 12 27 17 26 6 2 3 13 20 25 13 16 5 0 193 (1) 1.90 .32 .32 3.80 8.54 5.38 8.23 1.90 .63 .95 4.11 6.33 7.91 4.11 5.06 1.58 .00 61.08 (2) .07 .01 .01 .14 .31 .20 .30 .07 .02 .03 .15 .23 .29 .15 .19 .06 .00 2.23 13-18 0 0 2 2 0 1 0 0 0 2 7 5 6 18 7 1 0 51 (1) .00 .00 .63 .63 .00 .32 .00 .00 .00 .63 2.22 1.58 1.90 5.70 2.22 .32 .00 16.14 (2) .00 .00 .02 .02 .00 .01 .00 .00 .00 .02 .08 .06 .07 .21 .08 .01 .00 .59 19-24 0 0 0 0 0 0 0 0 0 0 1 0 1 1 2 0 0 5 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .32 .00 .32 .32 .63 .00 .00 1.58 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .00 .01 .01 .02 .00 .00 .06 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 7 1 3 17 32 26 35 7 4 6 26 33 44 39 27 9 0 316 (1) 2.22 .32 .95 5.38 10.13 8.23 11.08 2.22 1.27 1.90 8.23 10.44 13.92 12.34 8.54 2.85 .00 100.00 (2) .08 .01 .03 .20 .37 .30 .40 .08 .05 .07 .30 .38 .51 .45 .31 .10 .00 3.65 (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 JANOB-DEC08 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS C CLASS FREQUENCY (PERCENT) = 6.70 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 1 0 2 2 0 0 0 0 0 0 2 0 2 1 0 0 0 10 (1) .17 .00 .35 .35 .00 .00 .00 .00 .00 .00 .35 .00 .35 .17 .00 .00 .00 1.73 (2) .01 .00 .02 .02 .00 .00 .00 .00 .00 .00 .02 .00 .02 .01 .00 .00 .00 .12 4-7 7 6 3 6 16 11 13 9 5 3 11 20 20 12 6 6 0 154 (1) 1.21 1.04 .52 1.04 2.76 1.90 2.25 1.55 .86 .52 1.90 3.45 3.45 2.07 1.04 1.04 .00 26.60 (2) .08 .07 .03 .07 .19 .13 .15 .10 .06 .03 .13 .23 .23 .14 .07 .07 .00 1.78 8-12 5 5 6 30 39 20 15 15 3 5 14 34 45 37 45 7 0 325 (1) .86 .86 1.04 5.18 6.74 3.45 2.59 2.59 .52 .86 2.42 5.87 7.77 6.39 7.77 1.21 .00 56.13 (2) .06 .06 .07 .35 .45 .23 .17 .17 .03 .06 .16 .39 .52 .43 .52 .08 .00 3.76 13-18 0 0 1 1 1 2 0 0 0 4 6 7 9 17 31 2 0 81 (1) .00 .00 .17 .17 .17 .35 .00 .00 .00 .69 1.04 1.21 1.55 2.94 5.35 .35 .00 13.99 (2) .00 .00 .01 .01 .01 .02 .00 .00 .00 .05 .07 .08 .10 .20 .36 .02 .00 .94 19-24 0 0 0 1 0 0 0 0 0 0 0 0 0 5 3 0 0 9 (1) .00 .00 .00 .17 .00 .00 .00 .00 .00 .00 .00 .00 .00 .86 .52 .00 .00 1.55 (2) .00 .00 .00 .01 .00 .00 .00 .00 .00 .00 .00 .00 .00 .06 .03 .00 .00 .10 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 13 11 12 40 56 33 28 24 8 12 33 61 76 72 85 15 0 579 (1) 2.25 1.90 2.07 6.91 9.67 5.70 4.84 4.15 1.38 2.07 5.70 10.54 13.13 12.44 14.68 2.59 .00 100.00 (2) .15 .13 .14 .46 .65 .38 .32 .28 .09 .14 .38 .71 .88 .83 .98 .17 .00 6.70 (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 JAN08-DEC08 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS D CLASS FREQUENCY (PERCENT) = 47.85 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 0 0 1 0 0 0 0 0 0 0 0 0 0 2 (1) .00 .02 .00 .00 .00 .00 .02 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .05 (2) .00 .01 .00 .00 .00 .00 .01 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .02 C-3 29 17 17 16 16 17 11 31 28 18 23 19 30 23 28 32 0 355 (1) .70 .41 .41 .39 .39 .41 .27 .75 .68 .43 .56 .46 .72 .56 .68 .77 .00 8.58 (2) .34 .20 .20 .19 .19 .20 .13 .36 .32 .21 .27 .22 .35 .27 .32 .37 .00 4.11 4-7 93 64 68 94 149 85 69 165 99 81 93 135 135 152 146 87 0 1715 (1) 2.25 1.55 1.64 2.27 3.60 2.05 1.67 3.99 2.39 1.96 2.25 3.26 3.26 3.67 3.53 2.10 .00 41.45 (2) 1.08 .74 .79 1.09 1.72 .98 .80 1.91 1.14 .94 1.08 1.56 1.56 1.76 1.69 1.01 .00 19.83 8-12 62 26 96 73 77 72 50 57 28 62 133 99 139 205 228 63 0 1470 (1) 1.50 .63 2.32 1.76 1.86 1.74 1.21 1.38 .68 1.50 3.21 2.39 3.36 4.95 5.51 1.52 .00 35.52 (2) .72 .30 1.11 .84 .89 .83 .58 .66 .32 .72 1.54 1.14 1.61 2.37 2.64 .73 .00 17.00 13-18 6 3 52 30 27 18 3 4 2 15 58 23 71 100 108 6 0 526 (1) .14 .07 1.26 .72 .65 .43 .07 .10 .05 .36 1.40 .56 1.72 2.42 2.61 .14 .00 12.71 (2) .07 .03 .60 .35 .31 .21 .03 .05 .02 .17 .67 .27 .82 1.16 1.25 .07 .00 6.08 19-24 0 0 8 5 10 6 2 1 0 1 7 2 5 9 10 0 0 66 (1) .00 .00 .19 .12 .24 .14 .05 .02 .00 .02 .17 .05 .12 .22 .24 .00 .00 1.59 (2) .00 .00 .09 .06 .12 .07 .02 .01 .00 .01 .08 .02 .06 .10 .12 .00 .00 .76 GT 24 0 0 0 1 1 2 0 0 0 0 0 0 0 0 0 0 0 4 (1) .00 .00 .00 .02 .02 .05 .00 .00 .00 .00 .00 .00 .00 .00 ý00 .00 .00 .10 (2) .00 .00 .00 .01 .01 .02 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .05 ALL SPEEDS 190 ill 241 219 280 200 136 258 157 177 314 278 380 489 520 188 0 4138 (1) 4.59 2.68 5.82 5.29 6.77 4.83 3.29 6.23 3.79 4.28 7.59 6.72 9.18 11.82 12.57 4.54 .00 100.00 (2) 2.20 1.28 2.79 2.53 3.24 2.31 1.57 2.98 1.82 2.05 3.63 3.21 4.39 5.66 6.01 2.17 .00 47.85 (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 JAN08-DEC08 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS E CLASS FREQUENCY (PERCENT) = 24.63 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 3 1 0 0 1 0 0 0 0 0 0 1 0 0 2 1 0 9 (1) .14 .05 .00 .00 .05 .00 .00 .00 .00 .00 .00 .05 .00 .00 .09 .05 .00 .42 (2) .03 .01 .00 .00 .01 .00 .00 .00 .00 .00 .00 .01 .00 .00 .02 .01 .00 .10 C-3 21 15 22 51 41 24 13 17 33 42 54 61 80 64 54 27 0 619 (1) .99 .70 1.03 2.39 1.92 1.13 .61 .80 1.55 1.97 2.54 2.86 3.76 3.00 2.54 1.27 .00 29.06 (2) .24 .17 .25 .59 .47 .28 .15 .20 .38 .49 .62 .71 .93 .74 .62 .31 .00 7.16 4-7 30 14 12 31 39 19 31 33 41 69 107 238 190 184 119 34 0 1191 (1) 1.41 .66 .56 1.46 1.83 .89 1.46 1.55 1.92 3.24 5.02 11.17 8.92 8.64 5.59 1.60 .00 55.92 (2) .35 .16 .14 .36 .45 .22 .36 .38 .47 .80 1.24 2.75 2.20 2.13 1.38 .39 .00 13.77 8-12 3 2 6 9 12 0 4 4 5 17 44 63 23 36 29 2 0 259 (1) .14 .09 .28 .42 .56 .00 .19 .19 .23 .80 2.07 2.96 1.08 1.69 1.36 .09 .00 12.16 (2) .03 .02 .07 .10 .14 .00 .05 .05 .06 .20 .51 .73 .27 .42 .34 .02 .00 3.00 13-18 0 0 2 1 4 2 0 1 0 7 17 2 6 2 1 0 0 45 (1) .00 .00 .09 .05 .19 .09 .00 .05 .00 .33 .80 .09 .28 .09 .05 .00 .00 2.11 (2) .00 .00 .02 .01 .05 .02 .00 .01 .00 .08 .20 .02 .07 .02 .01 .00 .00 .52 19-24 0 0 2 0 0 1 0 0 0 0 2 0 0 0 0 0 0 5 (1) .00 .00 .09 .00 .00 .05 .00 .00 .00 .00 .09 .00 .00 .00 .00 .00 .00 .23 (2) .00 .00 .02 .00 .00 .01 .00 .00 .00 .00 .02 .00 .00 .00 .00 .00 .00 .06 GT 24 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 2 (1) .00 .00 .00 .00 .09 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .09 (2) .00 .00 .00 .00 .02 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .02 ALL SPEEDS 57 32 44 92 99 46 48 55 79 135 224 365 299 286 205 64 0 2130 (1) 2.68 1.50 2.07 4.32 *4.65 2.16 2.25 2.58 3.71 6.34 10.52 17.14 14.04 13.43 9.62 3.00 .00 100.00 (2) .66 .37 .51 1.06 1.14 .53 .56 .64 .91 1.56 2.59 4.22 3.46 3.31 2.37 .74 .00 24.63 (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 JAN08-DECO8 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43,0 FT WIND DATA STABILITY CLASS F CLASS FREQUENCY (PERCENT) = 8.56 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 3 0 0 0 0 0 1 0 0 3 1 0 1 1 0 11 (1) .00 .14 .41 .00 .00 .00 .00 .00 .14 .00 .00 .41 .14 .00 .14 .14 .00 1.49 (2) .00 .01 .03 .00 .00 .00 .00 .00 .01 .00 .00 .03 .01 .00 .01 .01 .00 .13 C-3 9 19 14 18 11 4 6 4 6 15 38 79 87 57 44 23 0 434 (1) 1.22 2.57 1.89 2.43 1.49 .54 .81 .54 .81 2.03 5.14 10.68 11.76 7.70 5.95 3.11 .00 58.65 (2) .10 .22 .16 .21 .13 .05 .07 .05 .07 .17 .44 .91 1.01 .66 .51 .27 .00 5.02 4-7 3 1 2 2 3 2 2 3 1 4 26 60 63 41 62 13 0 288 (1) .41 .14 .27 .27 .41 .27 .27 .41 .14 .54 3.51 8.11 8.51 5.54 8.38 1.76 .00 38.92 (2) .03 .01 .02 .02 .03 .02 .02 .03 .01 .05 .30 .69 .73 .47 .72 .15 .00 3.33 8-12 0 0 0 1 0 0 0 0 0 0 0 0 1 0 2 0 0 4 (1) .00 .00 .00 .14 .00 .00 .00 .00 .00 .00 .00 .00 .14 .00 .27 .00 .00 .54 (2) .00 .00 .00 .01 .00 .00 .00 .00 .00 .00 .00 .00 .01 .00 .02 .00 .00 .05 13-18 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 (1) .00 .00 .14 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .14 (2) .00 .00 .01 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 19-24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 2 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .14 .14 .00 .27 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .01 .00 .02 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 21 20 21 14 6 8 7 8 19 64 142 152 98 110 38 0 740 (1) 1.62 2.84 2.70 2.84 1.89 .81 1.08 .95 1.08 2.57 8.65 19.19 20.54 13.24 14.86 5.14 .00 100.00 (2) .14 .24 .23 .24 .16 .07 .09 .08 .09 .22 .74 1.64 1.76 1.13 1.27 .44 .00 8.56 (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 JAN08-DECO0 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS G CLASS FREQUENCY (PERCENT) = 6.19 WIND DIRECTION FROM SPEED N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VRBL TOTAL MPH CALM 1 0 0 1 0 1 0 0 0 0 2 0 0 2 1 0 0 8 (1) .19 .00 .00 .19 .00 .19 .00 .00 .00 .00 .37 .00 .00 .37 .19 .00 .00 1.50 (2) .01 .00 .00 .01 .00 .01 .00 .00 .00 .00 .02 .00 .00 .02 .01 .00 .00 .09 C-3 9 4 2 4 1 3 2 3 1 9 14 71 141 ill 49 6 0 430 (1) 1.68 .75 .37 .75 .19 .56 .37 .56 .19 1.68 2.62 13.27 26.36 20.75 9.16 1.12 .00 80.37 (2) .10 .05 .02 .05 .01 .03 .02 .03 .01 .10 .16 .82 1.63 1.28 .57 .07 .00 4.97 4-7 0 0 0 2 0 0 0 0 0 0 3 7 17 28 37 1 0 95 (1) .00 .00 .00 .37 .00 .00 .00 .00 .00 .00 .56 1.31 3.18 5.23 6.92 .19 .00 17.76 (2) .00 .00 .00 .02 .00 .00 .00 .00 .00 .00 .03 .08 .20 .32 .43 .01 .00 1.10 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 .19 .00 .00 .19 (2) .00 .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 1 0 1 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .19 .00 .19 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .00 .01 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 10 4 2 7 1 4 2 3 1 9 19 78 158 141 88 8 0 535 (1) 1.87 .75 .37 1.31 .19 .75 .37 .56 .19 1.68 3.55 14.58 29.53 26.36 16.45 1.50 .00 100.00 (2) .12 .05 .02 .08 .01 .05 .02 .03 .01 .10 .22 .90 1.83 1.63 1.02 .09 .00 6.19 (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 JAN08-DEC08 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 4 3 3 1 1 1 1 0 1 0 2 4 1 2 4 2 0 30 (1) .05 .03 .03 .01 .01 .01 ý01 .00 .01 .00 .02 .05 .01 .02 .05 .02 .00 .35 (2) .05 .03 .03 .01 .01 .01 .01 .00 .01 .00 .02 .05 .01 .02 .05 .02 .00 .35 C-3 69 55 58 92 70 49 32 55 68 84 132 230 340 257 175 88 0 1854 (1) .80 .64 .67 1.06 .81 .57 .37 .64 .79 .97 1.53 2.66 3.93 2.97 2.02 1.02 .00 21.44 (2) .80 .64 .67 1.06 .81 .57 .37 .64 .79 .97 1.53 2.66 3.93 2.97 2.02 1.02 .00 21.44 4-7 134 85 85 138 216 126 131 211 149 158 246 469 439 423 372 145 0 3527 (1) 1.55 .98 .98 1.60 2.50 1.46 1.51 2.44 1.72 1.83 2.84 5.42 5.08 4.89 4.30 1.68 .00 40.79 (2) 1.55 .98 .98 1.60 2.50 1.46 1.51 2.44 1.72 1.83 2.84 5.42 5.08 4.89 4.30 1.68 .00 40.79 8-12 77 34 109 131 170 125 124 102 39 87 208 229 244 304 326 78 0 2387 (1) .89 .39 1.26 1.51 1.97 1.45 1.43 1.18 .45 1.01 2.41 2.65 2.82 3.82 3.77 .90 .00 27.60 (2) .89 .39 1.26 1.51 1.97 1.45 1.43 1.18 .45 1.01 2.41 2.65 2.82 3.52 3.77 .90 .00 27.60 13-18 6 3 59 38 32 27 3 6 6 33 97 41 100 142 150 9 0 752 (1) .07 .03 .68 .44 .37 .31 .03 .07 .07 .38 1.12 .47 1.16 1.64 1.73 .10 .00 8.70 (2) .07 .03 .68 .44 .37 .31 .03 .07 .07 .38 1.12 .47 1.16 1.64 1.73 .10 .00 8.70 19-24 0 0 10 7 11 7 2 1 0 1 10 2 6 15 17 2 0 91 (1) .00 .00 .12 .08 .13 .08 .02 .01 .00 .01 .12 .02 .07 .17 .20 .02 .00 1.05 (2) .00 .00 .12 .08 .13 .08 .02 .01 .00 .01 .12 .02 .07 .17 .20 .02 .00 1.05 GT 24 0 0 0 1 3 2 0 0 0 0 0 0 0 0 0 0 0 6 (1) .00 .00 .00 .01 .03 .02 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .07 (2) .00 .00 .00 .01 .03 .02 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .07 ALL SPEEDS 290 180 324 408 503 337 293 375 263 363 695 975 1130 1143 1044 324 0 8647 (1) 3.35 2.08 3.75 4.72 5.82 3.90 3.39 4.34 3.04 4.20 8.04 11.28 13.07 13.22 12.07 3.75 .00 100.00 (2) 3.35 2.08 3.75 4.72 5.82 3.90 3.39 4.34 3.04 4.20 8.04 11.28 13.07 13.22 12.07 3.75 .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 JAN08-DEC08 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND DATA STABILITY CLASS A CLASS FREQUENCY (PERCENT) = 2.41 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 0 0 1 0 0 0 0 0 0 0 2 (1) .00 .00 .50 .00 .00 .00 .00 .00 .00 .50 .00 .00 .00 .00 .00 .00 .00 1.01 (2) .00 .00 .01 .00 .00 .00 .00 .00 .00 .01 .00 .00 .00 .00 .00 .00 .00 .02 4-7 0 0 1 1 2 0 0 0 1 0 0 1 0 0 0 0 0 6 (1) .00 .00 .50 .50 1.01 .00 .00 .00 .50 .00 .00 .50 .00 .00 .00 .00 .00 3.02 (2) .00 .00 .01 .01 .02 .00 .00 .00 .01 .00 .00 .01 .00 .00 .00 .00 .00 .07 8-12 1 0 1 6 11 10 31 0 1 0 1 4 4 2 0 1 0 73 (1) .50 .00 .50 3.02 5.53 5.03 15.58 .00 .50 .00 .50 2.01 2.01 1.01 .00 .50 .00 36.68 (2) .01 .00 .01 .07 .13 .12 .38 .00 .01 .00 .01 .05 .05 .02 .00 .01 .00 .89 13-18 0 0 1 3 4 2 20 8 1 3 10 8 12 12 7 0 0 91 (1) .00 .00 .50 1.51 2.01 1.01 10.05 4.02 .50 1.51 5.03 4.02 6.03 6.03 3.52 .00 .00 45.73 (2) .00 .00 .01 .04 .05 .02 .24 .10 .01 .04 .12 .10 .15 .15 .08 .00 .00 1.10 19-24 0 0 2 2 0 0 0 0 3 3 2 4 6 1 1 0 0 24 (1) .00 .00 1.01 1.01 .00 .00 .00 .00 1.51 1.51 1.01 2.01 3.02 .50 .50 .00 .00 12.06 (2) .00 .00 .02 .02 .00 .00 .00 .00 .04 .04 .02 .05 .07 .01 .01 .00 .00 .29 GT 24 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 0 0 3 (1) .00 .00 .00 .00 .50 .00 .00 .00 .00 .00 .00 .00 .00 .50 .50 .00 .00 1.51 (2) .00 .00 .00 .00 .01 .00 .00 .00 .00 .00 .00 .00 .00 .01 .01 .00 .00 .04 ALL SPEEDS 1 0 6 12 18 12 51 8 6 7 13 17 22 16 9 1 0 199 (1) .50 .00 3.02 6.03 9.05 6.03 25.63 4.02 3.02 3.52 6.53 8.54 11:06 8.04 4.S2 .50 .00 100.00 (2) .01 .00 .07 .15 .22 .15 .62 .10 .07 .08 .16 .21 .27 .19 .11 .01 .00 2.41 (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 JAN08-DEC08 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND DATA STABILITY CLASS B CLASS FREQUENCY (PERCENT) = 3.65 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 1 0 0 0 0 0 0 0 0 0 0 0 2 (1) .00 .00 .33 .00 .00 .33 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .66 (2) .00 .00 .01 .00 .00 .01 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .02 4-7 0 0 0 0 6 1 3 1 0 1 1 2 6 4 2 0 0 27 (1) .00 .00 .00 .00 1.99 .33 1.00 .33 .00 .33 .33 .66 1.99 1.33 .66 .00 .00 8.97 (2) .00 .00 .00 .00 .07 .01 .04 .01 .00 .01 .01 .02 .07 .05 .02 .00 .00 .33 8-12 3 1 1 9 25 13 21 4 2 5 8 15 11 7 1 4 0 130 (1) 1.00 .33 .33 2.99 8.31 4.32 6.98 1.33 .66 1.66 2.66 4.98 3.65 2.33 .33 1.33 .00 43.19 (2) .04 .01 .01 .11 .30 .16 .25 .05 .02 .06 .10 .18 .13 .08 .01 .05 .00 1.58

.13-18 4 1 1 6 3 2 6 6 0 2 9 10 16 24 19 2 0 i1 (1) 1.33 .33 .33 1.99 1.00 .66 1.99 1.99 .00 .66 2.99 3.32 5.32 7.97 6.31 .66 .00 36.88 (2) .05 .01 .01 .07 .04 .02 .07 .07 .00 .02 .11 .12 .19 .29 .23 .02 .00 1.35 19-24 0 0 4 0 0 0 0 0 0 1 2 2 8 9 0 0 0 26 (1) .00 .00 1.33 .00 .00 .00 .00 .00 .00 .33 .66 .66 2.66 2.99 .00 .00 .00 8.64 (2) .00 .00 .05 .00 .00 .00 .00 .00 .00 .01 .02 .02 .10 .11 .00 .00 .00 .32 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 2 3 0 0 0 5 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .66 1.00 .00 .00 .00 1.66 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .02 .04 .00 .00 .00 .06 ALL SPEEDS 7 2 7 15 34 17 30 11 2 9 20 29 43 47 22 6 0 301 (1) 2.33 .66 2.33 4.98 11.30 5.65 9.97 3.65 .66 2.99 6.64 9.63 14.29 15.61 7.31 1.99 .00 100.00 (2) .08 .02 .08 .18 .41 .21 .36 .13 .02 .11 .24 .35 .52 .57 .27 .07 .00 3.65 (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 JAN08-DEC08 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND DATA STABILITY CLASS C CLASS FREQUENCY (PERCENT) = 6.68 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 0 0 2 0 0 0 0 0 0 1 1 2 0 0 0 6 (1) .00 .00 .00 .00 .36 .00 .00 .00 .00 .00 .00 .18 .18 .36 .00 .00 .00 1.09 (2) .00 .00 .00 .00 .02 .00 .00 .00 .00 .00 .00 .01 .01 .02 .00 .00 .00 .07 4-7 5 3 2 4 7 2 6 0 4 2 5 9 7 1 4 1 0 62 (1) .91 .54 .36 .73 1.27 .36 1.09 .00 .73 .36 .91 1.63 1.27 .18 .73 .18 .00 11.25 (2) .06 .04 .02 .05 .08 .02 .07 .00 .05 .02 .06 .11 .08 .01 .05 .01 .00 .75 8-12 14 3 7 27 29 22 25 15 3 5 12 27 23 32 11 5 0 260 (1) 2.54 .54 1.27 4.90 5.26 3.99 4.54 2.72 .54 .91 2.18 4.90 4.17 5.81 2.00 .91 .00 47.19 (2) .17 .04 .08 .33 .35 .27 .30 .18 .04 .06 .15 .33 .28 .39 .13 .06 .00 3.15 13-18 0 2 2 6 5 2 4 9 0 4 7 19 26 32 45 6 0 169 (1) .00 .36 .36 1.09 .91 .36 .73 1.63 .00 .73 1.27 3.45 4.72 5.81 8.17 1.09 .00 30.67 (2) .00 .02 .02 .07 .06 .02 .05 .11 .00 .05 .08 .23 .32 .39 .55 .07 .00 2.05 19-24 0 0 2 1 1 0 0 0 0 3 1 3 13 12 6 1 0 43 (1) .00 .00 .36 .18 .18 .00 .00 .00 .00 .54 .18 .54 2.36 2.18 1.09 .18 .00 7.80 (2) .00 .00 .02 .01 .01 .00 .00 .00 .00 .04 .01 .04 .16 .15 .07 .01 .00 .52 GT 24 0 0 0 0 0 0 0 0 0 0 0 0 1 9 1 0 0 11 (1) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .18 1.63 .18 .00 .00 2.00 (2) .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .11 .01 .00 .00 .13 ALL SPEEDS 19 8 13 38 44 26 35 24 7 14 25 59 71 88 67 13 0 551 (1) 3.45 1.45 2.36 6.90 7.99 4.72 6.35 4.36 1.27 2.54 4.54 10.71 12.89 15.97 12.16 2.36 .00 100.00 (2) .23 .10 .16 .46 .53 .32 .42 .29 .08 .17 .30 .72 .86 1.07 .81 .16 .00 6.68 (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 JAN08-DEC08 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND DATA STABILITY CLASS D CLASS FREQUENCY (PERCENT) = 48.25 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 2 0 0 0 1 0 0 0 0 0 0 0 0 3 (1) .00 .00 .00 .00 .05 .00 .00 .00 .03 .00 .00 .00 .00 .00 .00 .00 .00 .08 (2) .00 .00 .00 .00 .02 .00 .00 .00 .01 .00 .00 .00 .00 .00 .00 .00 .00 .04 C-3 10 8 7 9 6 9 12 7 11 5 7 6 12 8 7 14 0 138 (1) .25 .20 .18 .23 .15 .23 .30 .18 .28 .13 .18 .15 .30 .20 .18 .35 .00 3.47 (2) .12 .10 .08 .11 .07 .11 .15 .08 .13 .06 .08 .07 .15 .10 .08 .17 .00 1.67 4-7 40 32 40 49 55 65 66 52 50 29 38 39 44 53 57 52 0 761 (1) 1.01 .80 1.01 1.23 1.38 1.63 1.66 1.31 1.26 .73 .96 .98 1.11 1.33 1.43 1.31 .00 19.13 (2) .49 .39 .49 .59 .67 -.79 .80 .63 .61 .35 .46 .47 .53 .64 .69 .63 .00 9.23 8-12 69 58 56 78 77 68 69 127 75 84 98 76 117 147 119 82 0 1400 (1) 1.73 1.46 1.41 1.96 1.94 1.71 1.73 3.19 1.89 2.11 2.46 1.91 2.94 3.70 2.99 2.06 .00 35.19 (2) .84 .70 .68 .95 .93 .82 .84 1.54 .91 1.02 1.19 .92 1.42 1.78 1.44 .99 .00 16.98 13-18 55 44 83 30 23 15 24 46 19 52 101 72 117 208 177 44 0 1110 (1) 1.38 1.11 2.09 .75 .58 .38 .60 1.16 .48 1.31 2.54 1.81 2.94 5.23 4.45 1.11 .00 27.90 (2) .67 .53 1.01 .36 .28 .18 .29 .56 .23 .63 1.23 .87 1.42 2.52 2.15 .53 .00 13.46 19-24 14 15 39 14 16 11 8 9 2 18 43 20 71 94 40 4 0 418 (1) .35 .38 .98 .35 .40 .28 .20 .23 .05 .45 1.08 .50 1.78 2.36 1.01 .10 .00 10.51 (2) .17 .18 .47 .17 .19 .13 .10 .11 .02 .22 .52 .24 .86 1.14 .49 .05 .00 5.07 GT 24 1 1 12 10 14 11 3 2 0 1 12 1 31 43 6 0 0 148 (1) .03 .03 .30 .25 .35 .28 .08 .05 .00 .03 .30 .03 .78 1.08 .15 .00 .00 3.72 (2) .01 .01 15 .12 .17 .13 .04 .02 .00 .01 .15 .01 .38 .52 .07 .00 .00 1.80 ALL SPEEDS 189 158 237 190 193 179 182 243 158 189 299 214 392 553 406 196 0 3978 (1) 4.75 3.97 5.96 4.78 4.85 4.50 4.58 6.11 3.97 4.75 7.52 5.38 9.85 13.90 10.21 4.93 .00 100.00 (2) 2.29 1.92 2.87 2.30 2.34 2.17 2.21 2.95 1.92 2.29 3.63 2.60 4.75 6.71 4.92 2.38 .00 48.25 (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 JAN08-DEC08 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND DATA STABILITY CLASS E CLASS FREQUENCY (PERCENT) = 24.16 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 1 0 0 0 0 1 0 0 1 0 0 0 0 4 (1) .00 .00 .05 .00 .05 .00 .00 .00 .00 .05 .00 .00 .05 .00 .00 .00 .00 .20 (2) .00 .00 .01 .00 .01 .00 .00 .00 .00 .01 .00 .00 .01 .00 .00 .00 .00 .05 C-3 3 4 8 12 11 6 15 7 5 5 9 4 3 4 3 3 0 102 (1) .15 .20 .40 .60 .55 .30 .75 .35 .25 .25 .45 .20 .15 .20 .15 .15 .00 5.12 (2) .04 .05 .10 .15 .13 .07 .18 .08 .06 .06 .11 .05 .04 .05 .04 .04 .00 1.24 4-7 15 14 18 21 14 26 26 26 42 32 25 21 23 20 28 23 0 374 (1) .75 .70 .90 1.05 .70 1.31 1.31 1.31 2.11 1.61 1.26 1.05 1.15 1.00 1.41 1.15 .00 18.78 (2) .18 .17 .22 .25 .17 .32 .32 .32 .51 .39 .30 .25 .28 .24 .34 .28 .00 4.54 8-12 46 30 7 17 15 12 35 28 66 67 110 130 112 131 98 40 0 944 (1) 2.31 1.51 .35 .85 .75 .60 1.76 1.41 3.31 3.36 5.52 6.53 5.62 6.58 4.92 2.01 .00 47.39 (2) .56 .36 .08 .21 .18 .15 .42 .34 .80 .81 1.33 1.58 1.36 1.59 1.19 .49 .00 11.45 13-18 10 6 5 7 4 2 4 6 6 31 69 102 67 118 53 10 0 500 (1) .50 .30 .25 .35 .20 .10 .20 .30 .30 1.56 3.46 5.12 3.36 5.92 2.66 .50 .00 25.10 (2) .12 .07 .06 .08 .05 .02 .05 .07 .07 .38 .84 1.24 .81 1.43 .64 .12 .00 6.07 19-24 1 1 2 7 1 0 2 2 1 9 15 2 5 4 1 0 0 53 (1) .05 .05 .10 .35 .05 .00 .10 .10 .05 .45 .75 .10 .25 .20 .05 .00 .00 2.66 (2) .01 .01 .02 .08 .01 .00 .02 .02 .01 .11 .18 .02 .06 .05 .01 .00 .00 .64 GT 24 0 0 1 0 2 3 0 0 0 2 2 0 4 1 0 0 0 15 (1) .00 .00 .05 .00 .10 .15 .00 .00 .00 .10 .10 .00 .20 .05 .00 .00 .00 .75 (2) .00 .00 .01 .00 .02 .04 .00 .00 .00 .02 .02 .00 .05 .01 .00 .00 .00 .18 ALL SPEEDS 75 55 42 64 48 49 82 69 120 147 230 259 215 278 183 76 0 1992 (1) 3.77 2.76 2.11 3.21 2.41 2.46 4.12 3.46 6.02 7.38 11.55 13.00 10.79 13.96 9.19 3.82 .00 100.00 (2) .91 .67 .51 .78 .58 .59 .99 .84 1.46 1.78 2.79 3.14 2.61 3.37 2.22 .92 .00 24.16 (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 JAN08-DEC08 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND DATA STABILITY CLASS F CLASS FREQUENCY (PERCENT) = 8.47 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 1 0 0 0 1 0 0 0 0 0 0 2 (1) .00 .00 .00 .00 .00 .00 .14 .00 .00 .00 .14 .00 .00 .00 .00 .00 .00 .29 (2) .00 .00 .00 .00 .00 .00 .01 .00 .00 .00 .01 .00 .00 .00 .00 .00 .00 .02 C-3 1 2 5 1 4 1 2 2 4 2 5 0 4 2 6 5 0 46 (1) .14 .29 .72 .14 .57 .14 .29 .29 .57 .29 .72 .00 .57 .29 .86 .72 .00 6.59 (2) .01 .02 .06 .01 .05 .01 .02 .02 .05 .02 .06 .00 .05 .02 .07 .06 .00 .56 4-7 14 3 3 12 6 3 10 12 20 9 13 15 19 10 11 9 0 169 (1) 2.01 .43 .43 1.72 .86 .43 1.43 1.72 2.87 1.29 1.86 2.15 2.72 1.43 1.58 1.29 .00 24.21 (2) .17 .04 .04 .15 .07 .04 .12 .15 .24 .11 .16 .18 .23 .12 .13 .11 .00 2.05 8-12 21 10 8 4 1 2 1 12 16 24 32 47 39 50 27 20 0 314 (1) 3.01 1.43 1.15 .57 .14 .29 .14 1.72 2.29 3.44 4.58 6.73 5.59 7.16 3.87 2.87 .00 44.99 (2) .25 .12 ".10 .05 .01 .02 .01 .15 .19 .29 .39 .57 .47 .61 .33 .24 .00 3.81 13-18 10 3 0 0 0 0 0 1 2 4 14 28 31 30 23 17 0 163 (1) 1.43 .43 .00 .00 .00 .00 .00 .14 .29 .57 2.01 4.01 4.44 4.30 3.30 2.44 .00 23.35 (2) .12 .04 .00 .00 .00 .00 .00 .01 .02 .05 .17 .34 .38 .36 .28 .21 .00 1.98 19-24 0 0 0 1 0 0 0 0 0 0 0 0 1 0 1 1 0 4 (1) .00 .00 .00 .14 .00 .00 .00 .00 .00 .00 .00 .00 .14 .00 .14 .14 .00 .57 (2) .00 .00 .00 .01 .00 .00 .00 .00 .00 .00 .00 .00 .01 .00 .01 .01 .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 46 is 16 18 11 6 14 27 42 39 65 90 94 92 68 52 0 698 (1) 6.59 2.58 2.29 2.58 1.58 .86 2.01 3.87 6.02 5.59 9.31 12.89 13.47 13.18 9.74 7.45 .00 100.00 (2) .56 .22 .19 .22 .13 .07 .17 .33 .51 .47 .79 1.09 1.14 1.12 .82 .63 .00 8.47 (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 JANO8-DEC08 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND DATA STABILITY CLASS G CLASS FREQUENCY (PERCENT) = 6.37 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 1 1 4 2 1 1 2 5 2 4 8 2 5 3 3 3 0 47 (1) .19 .19 .76 .38 .19 .19 .38 .95 .38 .76 1.52 .38 .95 .57 .57 .57 .00 8.95 (2) .01 .01 .05 .02 .01 .01 .02 .06 .02 .05 .10 .02 .06 .04 .04 .04 .00 .57 4-7 7 5 5 4 4 7 5 9 13 14 17 9 16 18 11 17 0 161 (1) 1.33 .95 .95 .76 .76 1.33 .95 1.71 2.48 2.67 3.24 1.71 3.05 3.43 2.10 3.24 .00 30.67 (2) .08 .06 .06 .05 .05 .08 .06 .11 .16 .17 .21 .11 .19 .22 .13 .21 .00 1.95 8-12 26 3 1 0 3 0 1 2 7 20 29 24 48 44 25 35 0 268 (1) 4.95 .57 .19 .00 .57 .00 .19 .38 1.33 3.81 5.52 4.57 9.14 8.38 4.76 6.67 .00 51.05 (2) .32 .04 .01 .00 .04 .00 .01 .02 .08 .24 .35 .29 .58 .53 .30 .42 .00 3.25 13-18 1 1 0 0 0 0 0 0 0 3 9 2 8 4 15 4 0 47 (1) .19 .19 .00 .00 .00 .00 .00 .00. .00 .57 1.71 .38 1.52 .76 2.86 .76 .00 8.95 (2) .01 .01 .00 100 .00 .00 .00 .00 .00 .04 .11 .02 .10 .05 .18 .05 .00 .57 19-24 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 2 (1) .19 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .19 .00 .00 .38 (2) .01 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .00 .00 .02 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 36 10 10 6 8 8 8 16 22 41 63 37 77 69 55 59 0 525 (1) 6.86 1.90 1.90' 1.14 1.52 1.52 1.52 3.05 4.19 7.81 12.00 7.05 14.67 13.14 10.48 11.24 .00 100.00 (2) .44 .12 .12 .07 .10 .10 .10 .19 .27 .50 .76 .45 .93 .84 .67 .72 .00 6.37 (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 JAN08-DEC08 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 3 0 1 0 1 1 1 0 1 0 0 0 0 9 (1) .00 .00 .01 .00 .04 .00 .01 .00 .01 .01 .01 .00 .01 .00 .00 .00 .00 .11 (2) .00 .00 .01 .00 .04 .00 .01 .00 .01 .01 .01 .00 .01 .00 .00 .00 .00 .11 C-3 15 15 26 24 24 18 31 21 22 17 29 13 25 19 19 25 0 343 (1) .18 .18 .32 .29 .29 .22 .38 .25 .27 .21 .35 .16 .30 .23 .23 .30 .00 4.16 (2) .18 .18 .32 .29 .29 .22 .38 .25 .27 .21 .35 .16 .30 .23 .23 .30 .00 4.16 4-7 81 57 69 91 94 104 116 100 130 87 99 96 115 106 113 102 0 1560 (1) .98 .69 .84 1.10 1.14 1.26 1.41 1.21 1.58 1.06 1.20 1.16 1.39 1.29 1.37 1.24 .00 18.92 (2) .98 .69 .84 1.10 1.14 1.26 1.41 1.21 1.58 1.06 1.20 1.16 1.39 1.29 1.37 1.24 .00 18.92 8-12 180 105 81 141 161 127 183 188 170 205 290 323 354 413 281 187 0 3389 (1) 2.18 1.27 .98 1.71 1.95 1.54 2.22 2.28 2.06 2.49 3.52 3.92 4.29 5.01 3.41 2.27 .00 41.11 (2) 2.18 1.27 .98 1.71 1.95 1.54 2.22 2.28 2.06 2.49 3.52 3.92 4.29 5.01 3.41 2.27 .00 41.11 13-18 80 57 92 52 39 23 58 76 28 99 219 241 277 428 339 83 0 2191 (1) .97 .69 1.12 .63 .47 .28 .70 .92 .34 1.20 2.66 2.92 3.36 5.19 4.11 1.01 .00 26.58 (2) .97 .69 1.12 .63 .47 .28 .70 .92 .34 1.20 2.66 2.92 3.36 5.19 4.11 1.01 .00 26.58 19-24 16 16 49 25 18 11 10 11 6 34 63 31 104 120 50 6 0 570 (1) .19 .19 .59 .30 .22 .13 .12 .13 .07 .41 .76 .38 1.26 1.46 .61 .07 .00 6.91 (2) .19 .19 .59 .30 .22 .13 .12 .13 .07 .41 .76 .38 1.26 1.46 .61 .07 .00 6.91 GT 24 1 1 13 10 17 14 3 2 0 3 14 1 38 57 8 0 0 182 (1) .01 .01 .16 .12 .21 .17 .04 .02 .00 .04 .17 .01 .46 .69 .10 .00 .00 2.21 (2) .01 .01 .16 .12 .21 .17 .04 .02 .00 .04 .17 .01 .46 .69 .10 .00 .00 2.21 ALL SPBEDS 373 251 331 343 356 297 402 398 357 446 715 705 914 1143 810 403 0 8244 (1) 4.52 3.04 4.02 4.16 4.32 3.60 4.88 4.83 4.33 5.41 8.67 8.55 11.09 13.86 9.83 4.89 .00 100.00 (2) 4.52 3.04 4.02 4.16 4.32 3.60 4.88 4.83 4.33 5.41 8.67 8.55 11.09 13.86 9.83 4.89 .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-09091 Radiation Dose Assessment

Seabrook Station Radiological Effluent Impact Assessment For 2008 (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.1 1 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 (10CFR50, 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 (10CFR50, APP. i) Max. Organ 7.5 mrem 15 mrem TOTAL DOSE Total Body & organ 25 mrem (40CFR190) T d

[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 2008 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 iodines, 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.# 47-9109180-000

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 2008 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 multiport 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 I 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 (4 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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III. Method for Calculatin2 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., meteorological data 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, DFj' and DFYO, have been taken from Table B-1 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 iodines, 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 duringthe 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 2008 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 iodines, tritium and particulates at the location of the maximally exposed individual are reported in Table A.

The estimated organ doses from iodines, 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 1.36E-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 1.66E-02 mrem.

Table B illustrates the total dose projections from all station sources to the maximum potential off-site individual for the year 2008 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. Seabrook Station Offsite Dose Calculation Manual (ODCM), Revision 32, Effective Date 07-18-08.

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 2008 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 2008 Liquid Effluents:

Total Body Dose 3.14E-04 3.88E-04 4.39E-05 2.22E-05 7.69E-04 (1) (1) (2) (2)

Organ Dose 4.58E-04 3.02E-03 1.84E-04 1.06E-04 3.77E-03 (3) (4) (5) (5)

Airborne Effluents:

Organ Dose from lodines, 1.18E-03 4.66E-03 3.61E-03 3.36E-03 1.28E-02 Tritium, and Particulates (6) (7) (7) (8)

Noble Gases Beta Air 3.2 1E-06 3.05E-05 9.22E-07 1.42E-06 3.61E-05 (mrad) (9) (10) (11) (12)

Gamma Air 7.60E-06 3.84E-05 3.19E-06 5.93E-07 4.98E-05 (mrad) (9) (10) (11) (13)

Direct Dose Offsite From 0 Station Operation(e)

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

Science and Nature Center (SW, 488m): 9.21E-07 1.85E-06 1.44E-06 1.93E-06 6.14E-06 Organ Dose (mrem) (dl) (dl) (dl) (dl)

The "Rocks" (NE/ENE, 244m): 6.41E-05 8.13E-05 6.89E-05 2.06E-04 4.20E-04 Organ Dose (mrem) (dl) (dl) (dl) (dl) 8

Table A (continued)

Seabrook Station 2008 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) Adult (2) Child (3) Liver of an adult.

(4) GI-LLI of an adult.

(5) Bone of a child.

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

(7) Liver, kidney, lung, GI-LLI, thyroid, and whole body of a child, W 1315 m.

(8) Liver, kidney, lung, GI-LLI, thyroid, and whole body of a child, NNW 1009 m.

(9) N 914 m (10) E 2438 n (11) NW 914m (12) WNW 930 m (13) ENE 2276 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 2008 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:

(dl) Liver, kidney, lung, GI-LLI, thyroid, and whole body 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. 2008 data for the closest off-site environmental TLD locations in each sector (as listed in Tables B.4-1 and B.4-2of Seabrook's ODCM) were compared to preoperational data for the same locations. No statistical difference, which could be attributed to station sources, was identified.

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Table B Seabrook Station 2008 Annual Radioactive Effluent Release Report Total Dose to Maximum Off-Site Individual (40CFR190)

Release Source Total Body Maximum Organ(a)

(mrem) (mrem)

Liquids 7.69E-04 3.77E-03 Noble Gases 3.30E-05 3.30E-05 Gas lodines, Tritium & 1.28E02 1.28E-02 Particulates Direct Radiation 0 0 Annual Total 1.36E-02 1.66E-02 (a) Maximum organ includes consideration of the thyroid.

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Table C Seabrook Station 2008 Annual Radioactive Effluent Release Report Calculated 2008 Maximum Doses versus Apolicable Limits Applicable ODCM Calculated Percent ODCM Annual Annual (2008) of Receptor Control Limit Dose Limit Offsite Liquid Effluents Whole Body Dose C.6.2.1 3 mrem 7.69E-04 mrem 0.026%

Organ Dose C.6.2.1 10 mrem 3.77E-03 mrem 0.038%

Airborne Effluents Organ Dose (iodines, tritium, and part.) C.7.3.1 15 mrem 1.28E-02 mrem 0.085%

Gamma Air Dose (noble gases) C.7.2.1 10 mrad 4.98E-05 mrad 0.0005%

Beta Air Dose (noble gases) C.7.2.1 20 mrad 3.61E-05 mrad 0.00018%

All Station Sources (a)

Whole Body Dose C.8.1.1 25 mrem 1.36E-02 mirem 0.05%

Organ Dose C.8.1.1 25 mrem 1.66E-02 mrem 0.07%

Onsite (Science and Nature Center, 488m SW)

Airborne Effluents Organ Dose (iodines, tritium, and part.) C. 7 .3 .1(b) 15 mrem 6.14E-06 mrem 0.00004%

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

Airborne Effluents Organ Dose (iodines, tritium, and part.) C. 7 .3 .1(b) 15 mrem 4.20E-04 mrem 0.0028%

(a) The "all station sources" doses are the sum of the whole body doses and maximum organ doses from liquid, noble gas, and iodines/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 2008 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- 1, Reg. Guide 1.109 Daipj Dose factor Tables E-1 1 through E-14, R.G. 1.109 tp 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 2008 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 ki 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 Inhalation dose factor DFAija Tables E-7 through E- 10, Reg. Guide 1.109 di Nuclide deposition rate Reg. Guide 1.109 p Soil surface density Table B.7-2, Station ODCM te te grass Crop, exposure periodTalB.-,StinOC leafy vegetable, or pasture Table B.7-2, Station ODCM t______

th consumptionTaeB.-,StinOC Average time from crop harvest to Table B.7-2, Station ODCM Y, 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 2008 Annual Radioactive Effluent Release Report Sources of Values for the Factors Used in Dose Equations for Gaseous Releases Factor Definition Source tf Average time from feed to milk to consumption Reg. Guide 1.109 Fraction of the year that animals Table B.7-2, Station ODCM graze on pasture fs Fraction daily feed pasture grass Table B.7-2, Station ODCM Ff Stable element from feed transfer coefficient to meat Table E-1, Reg. Guide 1.109 Average time from meat animal slaughter to consumption Table E-15, Reg. Guide 1.109 DFlija Ingestion dose factor Tables E-1 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 Reg. Guide 1.109 fg produce Ingestion rate fractions for garden Reg. Guide 1.109

_________ leafy vegetables Rate constant for activity removal 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 2008 Annual Radioactive Effluent Release Report Receptor Locations* for Seabrook Station Milk Animals Nearest Nearest within 5 Mile Resident Garden Radius Sector mile (kin) mile (km) mile (km)

N 2.20 (3.55) 2.47 (3.97)

NNE 1.89 (3.04) 1.89 (3.04)

NE 1.82 (2.92) 2.17 (3.50)

ENE 1.44 (2.31)

E 1.59 (2.58)

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 (1.12) 0.76 (1.22)

SW 0.70 (1.13) 1.80 (1.12)

WSW 1.16 (1.87) 1.43 (2.31)

W 0.82 (1.32) 0.87 (1.40)

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 (1.04) 0.64 (1.04) 3.30 (5.32)

• Locations based on 2008 Land Use Census.

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ENCLOSURE 4 TO SBK-L-09091 Offsite Dose Calculation Manual (ODCM)