Text

Annual Radioactive Effluent Release Report for 1999
	ML003710969
Person / Time
Site:	Seabrook
Issue date:	04/27/2000
From:	Diprofio W; North Atlantic Energy Service Corp
To:	; NRC/OCIO/IMD/RMB
References
	-RFPFR, AR#97010035, NYN-00037
	Download: ML003710969 (67)
	v • d • e

ý,,,t" North Atlantic Energy Service Corporation SNorth P.O. Box 300 Not Seabrook, NH 03874 Atlantic (603) 474-9521 The Northeast Utilities System April 27, 2000 Docket No.54-443 NYN-00037 AR#97010035 U.S. Nuclear Regulatory Commission Attn.: Document Control Desk Washington, DC 20555-0001 Seabrook Station Annual Radioactive Effluent Release Report North Atlantic Energy Service Corporation (North Atlantic) has enclosed the Annual Radioactive Effluent Release Report for 1999. This report is submitted pursuant to Technical Specification 6.8.1.4.

The following information is provided in the enclosures:

Effluent release data as required by Regulatory Guide 1.21 Joint frequency distributions of wind speed, wind direction and atmospheric stability Radiation dose assessment Should you have any questions regarding this letter, please contact James M. Peschel, Manager Regulatory Programs, at (603) 773-7194.

Very truly yours, NORTH ATLANTIC ENERGY SERVICE CORP.

S iinllerector"

U.S. Nuclear Regulatory Commission NYN-00037 / Page 2 cc:

H. J. Miller, NRC Region I Administrator R. M. Pulsifer, NRC Project Manager, Project Directorate 1-2 R. K. Lorson, NRC Senior Resident Inspector

NYN-00037 ANNUAL RADIOACTIVE EFFLUENT RELEASE REPORT

(*with enclosure)

Cuoco, L. M.

e-mail Kacich, R. M.

e-mail Leland, W. B.*

49-SS Litman, R.

e-mail Letter Distribution e-mail Licensing File 0001*

01-48 RMD 02-06

ENCLOSURE 1 TO NYN-00037 Effluent Release Data as Required by Regulatory Guide 1.21

EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT Supplemental Information 1999 Facility:

Seabrook Station Unit 1 Licensee:

North Atlantic Energy Service Corporation

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 lCi/mil dissolved or entrained gas.

2.

Maximum Permissible Concentrations Provide the MPC's used in determining allowable release rates or concentrations.

a.

Fission and activation gases: 1 MPC

b.

lodines: 1 MPC

c.

Particulates, half-lives >8 days: 1 MPC

d.

Liquid Effluents: 1 MPC

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.

Iodines: 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: 148

b.

Total time for batch releases: 35837 minutes

c.

Maximum time period for batch release: 2110 minutes

d.

Average time period for batch release: 242 minutes

e.

Minimum time period for batch release: 21 minutes

f.

Average stream flow during periods of release of effluents into a flowing stream:

1.60E+06 liters per minute B.

Gaseous

a.

Number of batch releases: 68

b.

Total time for batch releases: 100170 minutes

c.

Maximum time period for batch release: 40320 minutes

d.

Average time period for batch release: 1357 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 (1999)

GASEOUS EFFLUENTS-SUMMATION OF ALL RELEASES Unit Quarter Quarter Quarter Quarter Est.

1 2

3 4

Total Error, %

A. Fission and activation gases

1. Total releases Ci 1.32E-01 2.62E-01 2.15E-01 1.51E-01 1.70E+01

2. Average release rate Rci/sec 1.70E-02 3.37E-02 2.70E-02 1.90E-02 for period

3. Percent of applicable 8.78E-04 1.05E-03 8.88E-04 1.23E-03 Technical Specification Limit B. Iodines

1. Total release Ci ND 9.81E-07 ND ND 1.50E+01

2.

Average release rate pci/sec NA 1.26E-07 NA NA for period

3.

Percent of applicable 3.04E-01 6.65E-01 3.09E-01 2.96E-01 Technical Specification limit C. Particulates

1. Total release Ci 2.24E-06 1.05E-04 ND ND 1.80E+01

2. Average release rate pci/sec 2.88E-07 1.35E-05 NA NA for period

3.

Percent of applicable 3.04E-01 6.65E-01 3.09E-01 2.96E-01 Technical Specification Limit

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

Tritium

1. Total release I

Ci 2.26E+01 2.52E+01 2.31E+01 2.22E+01 I1.60E+1

2.

Average release rate for period pCi/sec 1 2.90E+00 1 3.24E+00 2.91E+00 2.79E+00

3. Percent of applicable 13.04E-01 6.65E-01 3.09E-01 2.96E-01 Technical Specification limitI

TABLE lB EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (1999)

GASEOUS EFFLUENTS-ELEVATED RELEASES CONTINUOUS MODE Nuclides Released Unit Quarter IQuarter Quarter Quarter 11 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 unidentified Ci ND ND ND ND Total for period Ci 0.OOE+00 0.OOE+00 0.OOE+00 O.00E+O0

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.

Particulate 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 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00

TABLE IB EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (1999)

GASEOUS EFFLUENTS-ELEVATED RELEASES BATCH MODE Nuclides Released Unit Quarter IQuarter Quarter Quarter 11 2

3 4

1. Fission and activation gases argon-41 Ci 3.84E-02 1.99E-02 4.08E-02 4.89E-02 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 3.12E-02 2.30E-02 4.40E-02 1.68E-02 xenon-133m Ci ND ND ND ND xenon-135 Ci 1.94E-05 2.75E-03 3.52E-04 ND xenon-135m Ci ND ND ND ND xenon-138 Ci ND ND ND ND unidentified Ci ND ND ND ND Total for period Ci 6.96E-02 4.57E-02 8.52E-02 6.57E-02

2.

lodines 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.O0E+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 unidentified Ci ND ND ND ND Total for period Ci O.OOE+00 0.OOE+00 O.OOE+00 O.OOE+00

TABLE IC EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (1999)

GASEOUS EFFLUENTS-GROUND LEVEL RELEASES CONTINUOUS MODE Nuclides Released Unit Quarter Quarter Quarter 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 6.30E-02 6.40E-02 ND ND xenon-135 Ci ND ND ND ND xenon-135m Ci ND ND ND ND xenon-138 Ci ND ND ND ND Unidentified Ci ND ND ND ND Total for period Ci 6.30E-02 6.40E-02 O.OOE+00 L.idE+00

2.

lodines iodine-131 Ci ND ND ND ND iodine-133 Ci ND ND ND ND Total for period Ci O.OOE+00 O.OOE+O0 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-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 1.39E-06 ND ND Cobalt-60 Ci ND ND ND ND Unidentified Ci ND ND ND ND Total for period Ci 0.OOE+00 1.39E-06 0.OOE+00 0.OOE+00

TABLE IC EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (1999)

GASEOUS EFFLUENTS-GROUND LEVEL RELEASES BATCH MODE Nuclides Released Unit I Quarter Quarter Quarter Qa 11 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-131m Ci ND ND ND ND xenon-133m Ci ND ND ND ND xenon-133 Ci ND 2.01E-02 ND ND xenon-135 Ci ND ND ND ND xenon-135m Ci ND ND ND ND xenon-138 Ci ND ND ND ND unidentified Ci ND ND ND ND Total for period Ci 0.00E+00 2.01E-02 O.QOE+00 0.OOE+O0

2.

lodines iodine-131 Ci ND 9.81E-07 ND ND iodine-132 Ci ND 9.31E-05 ND ND iodine-133 Ci ND ND ND ND iodine-135 Ci ND ND ND ND Total for period Ci 0.OOE+00 9.41E-05 O.0OE+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 3.66E-09 ND ND barium-lanthanum-140 Ci ND ND ND ND cobalt-57 Ci ND ND ND ND cobalt-58 Ci ND 6.62E-06 ND ND cobalt-60 Ci 1.07E-07 6.70E-07 ND ND manganese-54 Ci 1.78E-06 2.45E-07 ND ND iron-59 Ci ND ND ND ND niobium/zirconium-95 Ci ND 4.83E-07 ND ND chromium-51 Ci ND 2.60E-06 ND ND technetium-99m Ci ND ND ND ND bromine-82 Ci 3.57E-07 ND ND ND unidentified Ci ND ND ND ND Total for period Ci 2.24E-O0 1.06E-05 0.OOE+00 0.OOE+00

TABLE 2A EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (1999)

LIQUID EFFLUENTS-SUMMATION OF ALL RELEASES Unit Quarter IQatr2jouarter 3 Quarter 4 Est.

Total Error, %

A. Fission and activation products

1. Total release E.

Volume of waste released (prior to dilution)

F. Volume of dilution water used during period Ci ND ND I

ND ND l.OO6E+O liters l.ESE+07 1.68E+07 l.49E+07 1.47E+07 1.30E+00 liters 1.96E+lI 1.60E+1l 2.17E+l1 2.25E+ll 9.OOE+00

TABLE 2B EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (1999)

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 1.13E-06 ND ND cesium-137 Ci 1.77E-05 3.19E-06 ND ND iodine-131 Ci ND ND ND ND iodine-133 Ci ND ND ND ND cobalt-58 Ci ND 5.38E-06 ND 6.98E-05 cobalt-60 Ci ND 2.98E-04 2.65E-04 1.64E-04 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 ITotal for period(above)I Ci I 1.77E-05 I 3.08E-04 2.65E-04 2.34E-04 xenon-131m 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

TABLE 2B EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (1999)

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 2.43E-05 ND iodine-131 Ci 3.58E-04 ND 3.34E-06 ND iodine-133 Ci 1.24E-05 ND ND ND cobalt-57 Ci 6.79E-06 ND 3.58E-06 ND cobalt-58 Ci 7.79E-04 6.30E-03 4.56E-03 3.58E-04 cobalt-60 Ci 2.42E-03 8.19E-04 3.25E-04 1.34E-04 chromium-51 Ci ND ND ND ND iron-55 Ci 3.62E-03 2.92E-03 3.19E-03 1.28E-03 iron-59 Ci ND 1.67E-05 ND ND zinc-65 Ci ND ND ND ND manganese-54 Ci 5.96E-05 1.18E-05 2.34E-06 ND zirconium-niobium-95 Ci ND 7.84E-06 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 antimony-124 Ci ND 8.51E-05 1.54E-05 ND antimony-125 Ci 3.87E-03 4.99E-03 2.61E-03 6.76E-03 niobium-97 Ci ND ND ND ND tin-117m Ci ND ND ND ND sodium-24 Ci ND ND ND ND unidentified Ci ND ND ND ND ITotal for period(above)l Ci 31.lIE-02 1.52E-02 1.07E-02 8.53E-03 xenon-133 Ci 4.82E-05 ND ND ND xenon-135 Ci ND ND ND ND

TABLE 3 EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT 1999 SOLID WASTE AND IRRADIATED FUEL SHIPMENTS A. SOLID WASTE SHIPPED OFFSITE FOR BURIAL OR DISPOSAL (Not Irradiated Fuel)

1. Type of waste (no shipment made)

Unit Est. total error %

a. Spent resins, filter sludges, evaporator 23.3 m3 2.00 E+01 bottoms, etc.

82.1 Ci

b. Dry compressible waste, contaminated equip., etc.

0 m3 NA 0 Ci

c. Irradiated components, control rods, etc.

0 m3 NA 0 Ci

d. Other (describe) 4.72 m3 2.88 E+01 Dewatered Cartridge Filters 65.3 Ci

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

a.

Nuclide Ci H-3 0.84 6.93E-01 Mn-54 0.10 8.28E-02 Fe-55 6.00 4.93E+00 Co-57 0.04 3.64E-02 Co-58 4.95E-03 4.06E-03 Co-60 5.76 4.73E+00 Ni-63 86.84 7.13E+01 Sb-125 0.09 7.34E-02 Cs-134 0.12 9.89E-02 Cs-137 0.19 1.59E-01 Zr-95 6.54E-07 5.37E-07 Nb-95 1.89E-08 1.55E-08

b.

C.

Nuclide NA NA d

H-3 Cr-51 Mn-54 Fe-55 Fe-59 Co-57 Co-58 Co-60 Ni-63 Zr-95 Nb-95 Ag-110m Sn-113 Sb-125 Cs-134 Cs-137

3. Solid Waste Disposition Number of shipments 6

NA NA Ci NA NA Mode of Transportation Flatbed Truck Destination Chem Nuclear - Barnwell, S.C.

B. IRRADIATED FUEL SHIPMENTS (Disposition)

Number of Shipments 0

Mode of Transportation NA Destination NA 0.01 0.07 0.62 64.76 2.77E-03 0.05 1.01 12.77 18.29 0.05 0.03 1.86E-03 0.01 0.01 0.02 2.30 4.19E-03 4.73E-02 4.04E-01 4.23E+01 1.81E-03 3.54E-02 6.57E-01 8.34E+00 1.20E+01 3.13E-02 1.68E-02 1.2 1E-03 9.14E-03 6.54E-03 1.43E-02 1.50E+00

LIST OF APPENDICES Appendix Title A

Offsite Dose Calculation Manual B

Process Control Program C

Radioactive Liquid Effluent Monitoring Instrumentation D

Radioactive Gaseous Effluent Monitoring Instrumentation E

Liquid Holdup Tanks F

Radwaste Treatment Systems G

Unplanned Releases

Appendix A Offsite Dose Calculation Manual Requirement:

Technical Specification 6.13.2.b requires that licensee initiated changes to the Off-Site Dose Calculation Manual (ODCM) be submitted to the Commission in the Annual Radioactive Effluent Release Report for the period in which the changes were made effective. Included in these changes are changes to the Radiological Environmental Monitoring Program (REMP) in accordance with Technical Specifications 3.12.1 and 3.12.2.

Response

On December 15, 1999, Amendment 66 to the Seabrook Station's Operating License authorized the relocation of the Radiological Effluent Technical Specifications (RETS) to the ODCM. The relocation was implemented on April 12, 2000. These changes to the ODCM will be described and a copy provided in the 2000 Radioactive Effluent Release Report.

In 1999, the ODCM was revised to correct two minor errors. First, the Table of Contents was revised to accurately reflect the pages of the Manual. Second, a footnote was added to Table B.4-1, "Radiological Environment Monitoring Stations," monitoring location TM-15 to designate that this is an informational location that is not required by the monitoring program as defined in Part A of the ODCM. These changes, which were reviewed and approved by the SORC, did not reduce the accuracy or reliability of dose calculations or setpoint determinations.

The Kierstad Farm (TM-08) went out of business and dropped out of the Program during 1999. As a result of this farm being removed from the Program, the ODCM was revised in early 2000 to reflect the removal of milk sample location (TM-08) from Table B.4-1 (Radiological Environmental Monitoring Stations). This change was revised and found to be acceptable by the SORC. Again, like the above minor changes, removal of this milk sample location did not reduce the accuracy or reliability of dose calculations or setpoint determinations. Since this happened in 1999, the affected page is included as part of this submittal. There were no other effective changes made to the REMP. in 1999.

For this period, the REMP was conducted as specified in the ODCM. The Land Use Census for 1999 reflects the continued use of Global Positioning technology that more accurately locates and verifies residences and gardens as to distance and sector from containment.

Air sampler (AP/CF-01) was relocated within the same sector due to power availability and security. There was no impact to the Program from this change.

OFFSITE DOSE CALCULATION MANUAL (ODCM)

TABLE OF CONTENTS CONTENT PAGE PART A: RADIOLOGICAL EFFLUENT MONITORING PROGRAMS

1.0 INTRODUCTION

A.1-1 2.0 RESPONSIBILITIES FOR PART A A.2-1 3.0 LIQUID EFFLUENT SAMPLING AND ANALYSIS PROGRAM A.3-1 4.0 GASEOUS EFFLUENT SAMPLING AND ANALYSIS PROGRAM A.4-1 5.0 RADIOLOGICAL ENVIRONMENTAL MONITORING A.5-1 5.1 Sampling and Analysis Program A.5-1 5.2 Land Use Census A.5-1 PART B: RADIOLOGICAL CALCULATIONAL METHODS AND PARAMETERS

1.0 INTRODUCTION

1.1 Responsibilities for Part B 1.2 Summary of Methods, Dose Factors, Limits, Constants, Variables and Definitions 2.0 METHOD TO CALCULATE OFF-SITE LIQUID CONCENTRATIONS 2.1 Method to Determine F IS and CNG 2.2 Method to Determine Radionuclide Concentration for Each Liquid Effluent Source 2.2.1 Waste Test Tanks 2.2.2 Turbine Building Sump 2.2.3 Steam Generator Blowdown Flash Tank 2.2.4 Primary Component Cooling Water (PCCW) System 3.0 OFF-SITE DOSE CALCULATION METHODS 3.1 Introductory Concepts 3.2 Method to Calculate the Total Body Dose from Liquid Releases 3.2.1 Method I Page 1 B.1-1 B.1-1 B.1-2 B.2-1 B.2-1 B.2-2 B.2-2 B.2-3 B.2-3 B.2-3 B.3-1 B.3-2 B.3-4 B.34 ODCM Rev. 19

CONTENT 3.2.2 Method II B.3-5 3.3 Method to Calculate Maximum Organ Dose from Liquid Releases B.3-6 3.3.1 Method I B.3-6 3.3.2 Method II B.3-7 3.4 Method to Calculate the Total Body Dose Rate from Noble Gases B.3-8 3.4.1 Method I B.3-8 3.4.2 Method II B.3-10 3.5 Method to Calculate the Skin Dose Rate from Noble Gases B.3-11 3.5.1 Method I B.3-11 3.5.2 Method II B.3-14 3.6 Method to Calculate the Critical Organ Dose Rate from Iodines, Tritium and Particulates with T1/2 Greater than 8 Days B.3-15 3.6.1 Method I B.3-15 3.6.2 Method II B.3-18 3.7 Method to Calculate the Gamma Air Dose from Noble Gases B.3-19 3.7.1 Method I B.3-19 3.7.2 Method II B.3-21 3.8 Method to Calculate the Beta Air Dose from Noble Gases B.3-22 3.8.1 Method I B.3-22 3.8.2 Method II B.3-24 3.9 Method to Calculate the Critical Organ Dose from Iodines, Tritium and Particulates B.3-25 3.9.1 Method I B.3-25 3.9.2 Method II B.3-27 3.10 Method to Calculate Direct Dose from Plant Operation B.3-28 3.10.1 Method B.3-28 3.11 Dose Projections B.3-29 3.11.1 Liquid Dose Projections B.3-29 3.11.2 Gaseous Dose Projections B.3-29 ODCM Rev. 19 PAGE Page2

CONTENT PAGE 4.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM B.4-1 5.0 SETPOINT DETERMINATIONS B.5-1 5.1 Liquid Effluent Instrumentation Setpoints B.5-1 5.1.1 Liquid Waste Test Tank Monitor (RM-6509)

B.5-1 5.1.1.1 Method to Determine the Setpoint of the Liquid Waste Test Tank Monitor (RM-6509)

B.5-1 5.1.1.2 Liquid Waste Test Tank Monitor Setpoint Example B.5-3 5.1.2 Turbine Building Drains Liquid Effluent Monitor (RM-6521)

B.5-5 5.1.3 Steam Generator Blowdown Liquid Sample Monitor (RM-6519)

B.5-6 5.1.4 PCCW Head Tank Rate-of-Change Alarm Setpoint B.5-6 5.1.5 PCCW Radiation Monitor B.5-7 5.2 Gaseous Effluent Instrumentation Setpoints B.5-8 5.2.1 Plant Vent Wide-Range Gas Monitors (RM-6528-1, 2 and 3)

B.5-8 5.2.1.1 Method to Determine the Setpoint of the Plant Vent Wide Range Gas Monitors (RM-6528-1, 2 and 3)

B.5-8 5.2.1.2 Plant Vent Wide Range Gas Monitor Setpoint Example B.5-10 5.2.2 Waste Gas System Monitors (RM-6504 and RM-6503)

B.5-11 5.2.3 Main Condenser Air Evacuation Monitor (RM-6505)

B.5-12 6.0 LIQUID AND GASEOUS EFFLUENT STREAMS, RADIATION MONITORS AND RADWASTE TREATMENT SYSTEMS B.6-1 7.0 BASES FOR DOSE CALCULATION METHODS B.7-1 7.1 Liquid Release Dose Calculations B.7-1 7.1.1 Dose to the Total Body B.7-4 7.1.2 Dose to the Critical Organ B.7-4 7.2 Gaseous Release Dose Calculations B.7-7 7.2.1 Total Body Dose Rate from Noble Gases B.7-7 7.2.2 Skin Dose Rate from Noble Gases B.7-9 7.2.3 Critical Organ Dose Rate from Iodines, Tritium and Particulates with Half-Lives Greater Than Eight Days B.7-12 7.2.4 Gamma Dose to Air from Noble Gases B.7-14

.7.2.5 Beta Dose to Air from Noble Gases B.7-16 ODCM Rev. 19 Page 3

PAGE CONTENT 7.2.6 Dose to Critical Organ from lodines, Tritium and Particulates with Half-Lives Greater Than Eight Days B.7-18 7.2.7 Special Receptor Gaseous Release Dose Calculations B.7-20 7.2.7.1 Total Body Dose Rate from Noble Gases B.7-21 7.2.7.2 Skin Dose Rate from Noble Gases B.7-22 7.2.7.3 Critical Organ Dose Rate from lodines, Tritium and Particulates with Half-Lives Greater Than Eight Days B.7-24 7.2.7.4 Gamma Dose to Air from Noble Gases B.7-25 7.2.7.5 Beta Dose to Air from Noble Gases B.7-27 7.2.7.6 Critical Organ Dose from lodines, Tritium and Particulates with Half-Lives Greater Than Eight Days B.7-28 7.3 Receptor Points and Average Atmospheric Dispersion Factors for Important Exposure Pathways B.7-34 7.3.1 Receptor Locations B.7-34 7.3.2 Seabrook Station Atmospheric Dispersion Model B.7-35 7.3.3 Average Atmospheric Dispersion Factors for Receptors B.7-35 8.0 BASES FOR LIQUID AND GASEOUS MONITOR SETPOINTS B.8-1 8.1 Basis for the Liquid Waste Test Tank Monitor Setpoint B.8-1 8.2 Basis for the Plant Vent Wide Range Gas Monitor Setpoints B.8-5 8.3 Basis for PCCW Head Tank Rate-of-Change Alarm Setpoint B.8-10 8.4 Basis for Waste Gas Processing System Monitors (RM-6504 and RM-6503)

B.8-1 1 8.5 Basis for the Main Condenser Air Evacuation Monitor Setpoint (RM-6505)

B.8-14 8.5.1 Example for the Air Evacuation Monitor Setpoint During Normal Operations B.8-14 8.5.2 Example for the Air Evacuation Monitor Setpoint During Start Up (Hogging Mode)

B.8-16 REFERENCES R-1 APPENDIX A:

DOSE CONVERSION FACTORS A-i APPENDIX B:

CONCENTRATIONS IN AIR AND WATER ABOVE NATURAL BACKGROUND TAKEN FROM 10 CFR 20.1-20.602, APPENDIX B B-1 Page 4 ODCM Rev. 19

CONTENT APPENDIX C:

APPENDIX X:

APPENDIX Y:

EMS SOFTWARE DOCUMENTATION ODCM, REV. 18 (PENDING NRC APPROVAL) 10 CFR 50.59 EVALUATION ODCM Rev. 19 PAGE C-1 X-1 Y-1 Page 5

LIST OF TABLES AND FIGURES PART A TABLES A.3-1 Radioactive Liquid Waste Sampling and Analysis Program A.3-2 A.4-1 Radioactive Gaseous Waste Sampling and Analysis Program A.4-2 A.5-1 Radiological Environmental Monitoring Program A.5-3 A.5-2 Detection Capabilities for Environmental Sample Analysis a'f'g A.5-7 PART B TABLES B.1-1 Summary of Radiological Effluent Technical Specifications and Implementing Equations B1.1-3 B. 1-2 Summary of Method I Equations to Calculate Unrestricted Area Liquid Concentrations B.1-6 B.1-3 Summary of Method I Equations to Calculate Off-Site Doses from Liquid Releases B. 1-7 B.1-4 Summary of Method I Equations to Calculate Dose Rates B.1-8 B.1-5 Summary of Method I Equations to Calculate Doses to Air from Noble Gases B.1-11 B.1-6 Summary of Method I Equations to Calculate Dose to an Individual from Tritium, Iodine and Particulates B. 1-13 B.1-7 Summary of Methods for Setpoint Determinations B.l-14 B.1-8 Summary of Variables B.1-15 B.1-9 Definition of Terms B.1-22 B.1-10 Dose Factors Specific for Seabrook Station for Noble Gas Releases B.1-23 B.1-11 Dose Factors Specific for Seabrook Station for Liquid Releases B.1-24 B.1-12 Dose and Dose Rate Factors Specific for Seabrook Station for Iodines, Tritium and Particulate Releases B. 1-25 PAGE CONTENT

CONTENT PAGE B.1-15 Dose and Dose Rate Factors Specific for the "Rocks" for Iodine, Tritium, and Particulate Releases B. 1-28 B.4-1 Radiological Environmental Monitoring Stations(a)

B.4-2 B.7-1 Usage Factors for Various Liquid Pathways at Seabrook Station B.7-6 B.7-2 Environmental Parameters for Gaseous Effluents at Seabrook Station B.7-31 B.7-3 Usage Factors for Various Gaseous Pathways at Seabrook Station B.7-33 B.7-4 Seabrook Station Long-Term Average Dispersion Factors* Primary Vent Stack B.7-38 B.7-5 Seabrook Station Long-Term Average Dispersion Factors for Special (On-Site) Receptors Primary Vent Stack B.7-39 B.7-6 Seabrook Station Long-Term Atmospheric Diffusion and Deposition Factors Ground-Level Release Pathway B.7-40 PART B FIGURES B.4-1 Radiological Environmental Monitoring Locations within 4 Kilometers of Seabrook Station B.4-5 B.4-2 Radiological Environmental Monitoring Locations Between 4 Kilometers and 12 Kilometers from Seabrook Station B.4-6 B.4-3 Radiological Environmental Monitoring Locations Outside 12 Kilometers of Seabrook Station B.4-7 B.4-4 Direct Radiation Monitoring Locations within 4 Kilometers of Seabrook Station B.4-8 B.4-5 Direct Radiation Monitoring Locations Between 4 Kilometers and 12 Kilometers from Seabrook Station B.4-9 B.4-6 Direct Radiation Monitoring Locations Outside 12 Kilometers of Seabrook Station B.4-10 B.6-1 Liquid Effluent Streams, Radiation Monitors, and Radwaste Treatment System at Seabrook Station B.6-2 B.6-2 Gaseous Effluent Streams, Radiation Monitors, and Radwaste Treatment System at Seabrook Station B.6-3 ODCM Rev. 19 Page 7

LIST OF EFFECTIVE PAGES PAGE Cover Abstract TOG 1 -

7 LOEP 1 & 2 A.1-1 A.2-1 A.3-1 A.3-2 A.3-3 A.3-4 A.3-5 A.3-6 A.3-7 A.4-1 A.4-2 A.4-3 A.4-4 A.4-5 A.5-1 A.5-2 A.5-3 A.5-4 A.5-5 A.5-6 A.5-7 A.5-8 A.5-9 A.5-10 B.1-0 B.1-1 B.1-2 B.1-3 B.1-4 B.1-5 B.1-6 B.1-7 B.1-8 B.1-9 B.1-10 B.1-11 B.1-12 B.1-13 B.1-14 B.1-15 ODCM Rev.

19 REV.

19 16 19 19 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 17 17 16 16 16 16 16 16 16 16 16 16 17 17 17 PAGE B.1-16 B.1-17 B.1-18 B.1-19 B.1-20 B.1-21 B.1-22 B.1-23 B.1-24 B.1-25 B.1-26 B.1-27 B.1-28 B.2-1 B.2-2 B.2-3 B.3-1 B.3-2 B.3-3 B.3-4 B.3-5 B.3-6 B.3-7 B.3-8 B.3-9 B.3-10 B.3-11 B.3-12 B.3-13 B.3-14 B.3-15 B.3-16 B.3-17 B.3-18 B.3-19 B.3-20 B.3-21 B.3-22 B.3-23 B.3-24 B.3-25 B.3-26 B.3-27 B.3-28 B.3-29 B.3-30 B.3-31 B.4-1 B.4-2 B.4-3 REV.

17 16 16 17 17 17 17 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 19 19 16 PAGE B.4-4 B.4-5 B.4-6 B.4-7 B.4-8 B.4-9 B.4-10 B.5-1 B.5-2 B.5-3 B.5-4 B.5-5 B.5-6 B.5-7 B.5-8 B.5-9 B.5-10 B.5-11 B.5-12 B.6-1 B.6-2 B.6-3 B.7-1 B.7-2 B.7-3 B.7-4 B.7-5 B.7-6 B.7-7 B.7-8 B.7-9 B.7-10 B.7-11 B.7-12 B.7-13 B. 7-14 B.7-15 B.7-16 B.7-17 B.7-18 B.7-19 B. 7-20 B.7-21 B.7-22 B.7-23 B. 7-24 B.7-25 B.7-26 B. 7-27 B.7-28 REV.

16 17 17 16 16 16 16 17 17 17 17 17 17 17 17 17 17 17 17 17 17 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 Page 1

LIST OF EFFECTIVE PAGES PAGE REV.

PAGE REV.

B.7-29 16 B-I 16 X-B.2-i thru B.7-30 16 B-2 16 X-B.2-3 18 B.7-31 16 B-3 16 B.7-32 16 B-4 16 X-B.3-1 thru B.7-33 16 B-5 16 X-B.3-31 18 B.7-34 16 B-6 16 B.7-35 16 B-7 16 X-B.4-1 thru B.7-36 16 B-8 16 X-B.4-10 18 B.7-37 16 B-9 16 B.7-38 16 B-10 16 X-B.5-1 thru B.7-39 16 B-11 16 X-B.5-12 18 B.7-40 16 C-I 16 X-B.6-1 thru B.8-1 17 C-2 16 X-B.6-3 18 B.8-2 17 C-3 16 B.8-3 17 C-4 16 X-B.7-1 thru B.8-4 17 C-5 16 X-B.7-40 18 B.8-5 16 C-6 16 B.8-6 16 X-B.8-1 thru B.8-7 16 TOC X-i thru X-B.8-19 18 B.8-8 16 X-9 18 B.8-9 16 X-R-1 18 B.8-10 16 Abstract X-1 18 B.8-11 16 Y-1 thru B.8-12 16 X-A.1-1 18 Y-11 18 B.8-13 16 B.8-14 16 X-A.2-1 18 B.8-15 16 B.8-16 16 X-A.3-1 and B.8-17 16 X-A.3-2 18 B.8-18 16 B.8-19 16 X-A.4-1 and X-A.4-2 18 R-1 16 X-A.5-i thru A-I 16 X-A.5-10 18 A-2 16 A-3 16 X-A.6-1 thru A-4 16 X-A.6-I1 18 A-5 16 A-6 16 X-A.7-I thru A-7 16 X-A.7-12 18 A-8 16 A-9 16 X-A.8-1 and A-10 16 X-A.8-2 18 A-1i 16 A-12 16 X-A.9-1 thru A-13 16 X-A.9-13 18 A-14 16 A-15 16 X-A.10-1 thru A-16 16 X-A.10-3 18 A-17 16 A-18 16 X-B.1-0 thru A-19 16 X-B.I-28 18 ODCM Rev. 19 Page 2

TABLE B.4-1 RADIOLOGICAL ENVIRONMENTAL MONITORING STATIONS(a)

Exposure Pathway and/or SMle Sample Location and Designated Code Distance From Unit 1 Containment (kin)

Direction From the Plant

1.

AIRBORNE (Particulate and Radioiodine)

AP/CF-0l PSNH Barge Landing Area AP/CF-02 Harbor Road AP/CF-03 SW Boundary AP/CF-04 W. Boundary AP/CF-05 Winnacunnet H.S.(b)

AP/CF-06 Georgetown Substation (Control)

AP/CF-07 PSNH Substation(b)

AP/CF-08 E&H Substation(b)

2.

WATERBORNE

a.

Surface

b.

Sediment WS-01 WS-51 SE-02 SE-07 SE-08 SE-52 SE-57

3.

INGESTION

a. Milk TM-04 TM-08 TM-09 TM-15 TM-16 TM-20 TM-21 Hampton-Discharge Area Ipswich Bay (Control)

Hampton-Discharge Area(b)

Hampton Beach(b)

Seabrook Beach Ipswich Bay (Control)(b)

Plum Island Beach (Control) Cb)

Salisbury, MA Hampton Falls, NH

Hampton, NH Hampton Falls, NH(b)

Kensington, NH(b)

Rowley, MA (Control)

North Andover, MA(b)

b.

Fish and Invertebrates(c)

FH-03 FH-53 HA-04 HA-54 MU-06 MU-09 MU-56 MU-59 Hampton - Discharge Area Ipswich Bay (Control)

Hampton - Discharge Area Ipswich Bay (Control)

Hampton - Discharge Area Hampton Harbor(b)

Ipswich Bay (Control)

Plum Island(b)

ODCM Rev. 19 2.7 2.7 0.8 1.0 4.0 24.0 5.7 3.4 ESE E

SW W

NNE SSW NNW SSE 5.3 16.9 5.3 3.1 3.2 16.9 15.9 E

SSE E

E ESE SSE SSE 5.2 4.3 5.5 7.0 7.7 16.3 29.0 SW NNW NNW NW WNW S

SW 4.5 16.4 5.5 17.2 5.2 2.6 17.4 15.8 ESE SSE E

SSE E

E SSE SSE B.4-2

4.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM The radiological environmental monitoring stations are listed in Table B.4-1.

The locations of the stations with respect to the Seabrook Station are shown on the maps in Figures B.4-1 to B.4-6.

Direct radiation measurements are analyzed at the station.

All other radiological analyses for environmental samples are performed at the Yankee Environmental Laboratory.

The Yankee Environmental Laboratory participates in the U.S. Environmental Protection Agency's Environmental Intercomparison Studies Program for all relevant species in an aqueous (water) matrix.

An independent vendor (Analytics) supplies the remaining cross check samples.

These samples are presented on an air filter and in milk and water matrices.

Pursuant to Specification 4.12.2, the land use census will be conducted "during the growing season" at least once per 12 months.

The growing season is defined, for the purposes of the land use census, as the period from June 1 to October 1. The method to be used for conducting the census will consist of one or more of the following, as appropriate:

door-to-door survey, visual inspection from roadside, aerial survey, or consulting with local agricultural authorities.

Technical Specification 6.8.1.3 requires that the results of the Radiological Environmental Monitoring Program be summarized in the Annual Radiological Environmental Operating Report "in the format of the table in the Radiological Assessment Branch Technical Position, Revision 1, 1979."

The general table format will be used with one exception and one clarification, as follows.

The mean and range values will be based not upon detectable measurements only, as specified in the NRC Branch Technical Position, but upon all measurements.

This will prevent the positive bias associated with the calculation of the mean and range based upon detectable measurements only.

Secondly, the Lower Limit of Detection column will specify the LLD required by ODCM Table A.5-2 for that radionuclide and sample medium.

ODCM Rev. 19 B.4-1

TABLE B.4-1 RADIOLOGICAL ENVIRONMENTAL MONITORING STATIONS(a)

(Continued)

Exposure Distance From Direction From Pathway and/or Sample Location Unit 1 Direction From S M le and Designated Code Containment (km) the Plant TL-27 Highland St.,

7.6 W

S. Hampton TL-28 Route 150, Kensington 7.9 WNW TL-29 Frying Pan Lane, 7.4 NW Hampton Falls TL-30 Route 27, Hampton 7.9 NNW TL-31 Alumni Drive, Hampton 4.0 NNE TL-32 Seabrook Elementary School 1.9 S

TL-33 Dock Area, Newburyport 9.7 S

TL-34 Bow St., Exeter 12.1 NW TL-35 Lincoln Ackerman School 2.4 NNW TL-36 Route 97, Georgetown 22.0 SSW (Control)

TL-37 Plaistow, NH (Control) 26.0 WSW TL-38 Hampstead, NH (Control) 29.0 W

TL-39 Fremont, NH (Control) 27.0 WNW TL-40 Newmarket, NH (Control) 24.0 NNW TL-41 Portsmouth, NH 21.0 NNE (Control) (b)

TL-42 Ipswich, MA (Control)(b) 27.0 SSE (a)

Sample locations are shown on Figures B.4-1 to B.4-6.

(b)

This sample location is not required by monitoring program defined in Part A of ODCM; program requirements specified in Part A do not apply to samples taken at this location.

(c)

Samples will be collected pursuant to ODCM Table A.5-1.

Samples are not required from all stations listed during any sampling interval (FH = Fish; HA = Lobsters; MU = Mussels).

Table A.5-1 specifies that "one sample of three commercially and recreationally important species" be collected in the vicinity of the plant discharge area, with similar species being collected at a control location.

(This wording is consistent with the NRC Final Environmental Statement for Seabrook Station.)

Since the discharge area is off-shore, there is a great number of fish species that could be considered commercially or recreationally important.

Some are migratory (such as striped bass), making them less desirable as an indicator of plant-related radioactivity.

Some pelagic species (such as herring and mackerel) tend to school and wander throughout a large area, sometimes making catches of significant size difficult to obtain.

Since the collection of all species would be difficult or impossible, and would provide unnecessary redundancy in terms of monitoring important pathways to man, three fish and invertebrate species have been specified as a minimum requirement.

Samples may include marine fauna such as lobsters, clams, mussels, and bottom-dwelling fish, such as flounder or hake.

Several similar species may be grouped together into one sample if sufficient sample mass for a single species is not available after a reasonable effort has been made (e.g., yellowtail flounder and winter flounder).

ODCM Rev.

16 B.4-4

Appendix B Process Control Program Requirement:

Technical Specification 6.12.2.a requires that licensee initiated changes to the Process Control Program (PCP) be submitted to the Commission in the Annual Radioactive Effluent Release Report for the period in which the changes were made.

Response

During 1999, there were no changes to the PCP.

Appendix C Radioactive Liquid Effluent Monitoring Instrumentation Requirement:

Radioactive Liquid Effluent Monitoring Instrumentation channels are required to be operable in accordance with Technical Specification 3.3.3.9.b. With less than the minimum number of channels operable for 30 days, Technical Specification 3.3.3.9.b requires an explanation for the delay in correcting the inoperability in the next Annual Radiological Effluent Release Report in accordance with Technical Specification 6.8.1.4.

Response

A review of the Action Statement Status tracking system for the period from January 1, 1999 to December 31, 1999 indicated Technical Specification 3.3.3.9 was not entered for more than 30 consecutive days.

Appendix D Radioactive Gaseous Effluent Monitoring Instrumentation Requirement:

Radioactive Gaseous Effluent Monitoring Instrumentation Channels are required to be operable in accordance with Technical Specification 3.3.3.10.b. With less than the minimum number of channels operable for 30 days, Technical Specification 3.3.3.10.b requires an explanation for the delay in correcting the inoperability in the next Annual Radioactive Effluent Release Report in accordance with Technical Specification 6.8.1.4.

Response

A review of the Action Statement Status tracking system for the period from January 1, 1999 to December 31, 1999 indicated Technical Specification 3.3.3.10 was not entered for more than 30 consecutive days.

Appendix E 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 Radiological Effluent Release Report in accordance with Technical Specification 3.11.1.4.

Response: From January 1, 1999 to December 31, 1999, there was no radioactive material stored in any temporary outdoor tank that exceeded the limits of TS 3.11.1.4.

Appendix F 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: During 1999, there were no changes to the Radwaste Treatment Systems (liquid, gaseous and solid).

Appendix G 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.

Response: A review of the January 1, 1999 to December 31, 1999 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 NYN-00037 Joint Frequency Distributions of Wind Speed, Wind Direction and Atmospheric Stability

SEABROOK JAN99-DEC99 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS A CLASS FREQUENCY (PERCENT)

=

2.30 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 (1)

.00

.00 (2)

.00

.00 C-3 0

0 1

1 0

0 0

2 (1)

.00

.50

.00

.00 1.01 (2)

.00

.01

.00

.02 4-7 0

1 0

0 5

1 10 3

0 2

1 0

0 0

0 23 (1)

.00

.50

.00

.00 2.51

.50 5.03 1.51

.00 1.01

.50

.00

.00 11.56 (2)

.00

.01

.00

.06

.01

.12

.03

.00

.02

.01

.00

.27 8-12 0

1 0

0 24 14 67 7

1 7

4 3

5 5

0 1

0 139 (1)

.00

.50

.00

.00 12.06 7.04 33.67 3.52

.50 3.52 2.01 1.51 2.51 2.51

.00

.50

.00 69.85 (2)

.00

.01

.00

.28

.16

.77

.08

.01

.08

.05

.03

.06

.00

.01

.00 1.61 13-18 0

0 0

2 3

1 1

3 0

2 9

6 1

3 4

0 0

35 (1i

.00

.00 1.01 1.51

.50

.50 1.51

.00 1.01 4.52 3.02

.50 1.51 2.01

.00

.00 17.59 (2)

.00

.02

.03

.01

.03

.00

.02

.10

.07

.01

.03

.05

.00

.40 19-24 0

0 0

0 (1)

.00

.00 (2)

.00

.00 GT 24 0

0 0

0 (1)

.00

.00 (2)

.00

.00 ALL SPEEDS 0

2 1

3 32 16 78 13 1

11 14 9

6 8

4 1

0 199 (1)

.00 1.01

.50 1.51 16.08 8.04 39.20 6.53

.50 5.53 7.04 4.52 3.02 4.02 2.01

.50

.00 100.00 (2)

.00

.02

.01

.03

.37

.18

.90

.15

.01

.13

.16

.10

.07

.09

.05

.01

.00 2.30 (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 JAN99-DEC99 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS B CLASS FREQUENCY (PERCENT)

=

2.50 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 (1)

.00

.00 (2)

.00

.00 C-3 0

0 0

2 0

0 0

2 (1)

.00

.93

.00

.93 (2)

.00

.02

.00

.02 4-7 1

0 0

0 5

3 10 2

0 5

2 2

5 0

0 0

0 35 (1)

.46

.00

.00 2.31 1.39 4.63

.93

.00 2.31

.93

.93 2.31

.00

.00 16.20 (2)

.01

.00

.06

.03

.12

.02

.00

.06

.02

.06

.00

.40 8-12 4

2 0

10 18 7

30 6

2 2

6 9

5 16 9

2 0

128 (1i 1.85

.93

.00 4.63 8.33 3.24 13.89 2.78

.93

.93 2.78 4.17 2.31 7.41 4.17

.93

.00 59.26 (2)

.05

.02

.00

.12

.21

.08

.35

.07

.02

.07

.10

.06

.18

.10

.02

.00 1.48 13-18 0

0 3

2 0

0 1

0 2

1 5

0 4

11 14 1

0 44 (1)

.00

.00 1.39

.93

.00

.46

.00

.93

.46 2.31

.00 1.85 5.09 6.48

.46

.00 20.37 (2)

.00

.03

.02

.00

.01

.00

.02

.01

.06

.00

.05

.13

.16

.01

.00

.51 19-24 0

0 1

0 0

1 0

0 1

1 2

1 0

7 (1)

.00

.46

.00

.46

.00

.46

.93

.46

.00 3.24 (2)

.00

.01

.00

.01

.00

.01

.02

.01

.00

.08 GT 24 0

0 0

0 (1)

.00

.00 (2)

.00

.00 ALL SPEEDS 5

2 4

12 23 10 41 10 4

9 13 11 15 28 25 4

0 216 (1) 2.31

.93 1.85 5.56 10.65 4.63 18.98 4.63 1.85 4.17 6.02 5.09 6.94 12.96 11.57 1.85

.00 100.00 (2)

.06

.02

.05

.14

.27

.12

.47

.12

.05

.10

.15

.13

.17

.32

.29

.05

.00 2.50 (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 JAN99-DEC99 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS C CLASS FREQUENCY (PERCENT)

=

5.43 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 (1)

.00

.00 (2)

.00

.00 C-3 0

0 2

0 1

0 2

0 0

0 1

0 0

6 (1)

.00

.43

.00

.21

.00

.43

.00

.21

.00

.00 1.28 (2)

.00

.02

.00

.01

.00

.02

.00

.01

.00

.07 4-7 2

4 3

2 12 7

25 7

1 5

5 11 6

13 8

8 0

119 (1)

.43

.85

.64

.43 2.55 1.49 5.32 1.49

.21 1.06 1.06 2.34 1.28 2.77 1.70 1.70

.00 25.32 (2)

.02

.05

.03

.02

.14

.08

.29

.08

.01

.06

.13

.07

.15

.09

.00 1.38 8-12 13 0

6 18 24 20 29 6

2 14 20 18 22 43 17 11 0

263 (1) 2.77

.00 1.28 3.83 5.11 4.26 6.17 1.28

.43 2.98 4.26 3.83 4.68 9.15 3.62 2.34

.00 55.96 (2)

.15

.00

.07

.21

.28

.23

.34

.07

.02

.16

.23

.21

.25

.50

.20

.13

.00 3.04 13-18 1

1 5

0 2

2 0

0 0

1 4

6 13 16 26 1

0 78 (1)

.21

.21 1.06

.00

.43

.00

.21

.85 1.28 2.77 3.40 5.53

.21

.00 16.60 (2)

.01

.06

.00

.02

.00

.01

.05

.07

.15

.18

.30

.01

.00

.90 19-24 0

0 0

0 1

0 0

1 2

0 0

4 (1)

.00

.21

.00

.21

.43

.00

.85 (2)

.00

.01

.00

.01

.02

.00

.05 GT 24 0

0 0

0 (1)

.00

42)

.00

.00 ALL SPEEDS 16 5

16 20 39 29 56 13 4

20 29 35 42 73 53 20 0

470 (1) 3.40 1.06 3.40 4.26 8.30 6.17 11.91 2.77

.85 4.26 6.17 7.45 8.94 15.53 11.28 4.26

.00 100.00 (2)

.18

.06

.18

.23

.45

.34

.65

.15

.05

.23

.34

.40

.49

.84

.61

.23

.00 5.43 (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 JAN99-DEC99 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS D CLASS FREQUENCY (PERCENT)

=

42.34 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 (1)

.00

.03

.00

.03 (2)

.00

.01

.00

.01 C-3 15 11 17 30 14 2

12 10 13 14 6

8 27 28 15 11 0

233 (1)

.41

.30

.46

.82

.38

.05

.33

.27

.35

.38

.16

.22

.74

.76

.41

.30

.00 6.36 (2)

.17

.13

.20

.35

.16

.02

.14

.12

.15

.16

.07

.09

.31

.32

.17

.13

.00 2.69 4-7 80 32 42 86 120 59 103 84 71 59 43 73 115 118 110 62 0

1254 (1) 2.18

.87 1.15 2.35 3.28 1.61 2.81 2.29 1.94 1.61 1.17 1.99 3.14 3.14 3.00 1.69

.00 34.22 (2)

.92

.37

.49

.99 1.39

.68 1.19

.97

.82

.68

.50

.84 1.33 1.33 1.27

.72

.00 14.49 8-12 111 51 72 62 108 54 39 55 45 78 97 107 144 254 203 59 0

1539 (1) 3.03 1.39 1.97 1.69 2.95 1.47 1.06 1.50 1.23 2.13 2.65 2.92 3.93 6.93 5.54 1.61

.00 42.00 (2) 1.28

.59

.83

.72 1.25

.62

.45

.64

.52

.90 1.12 1.24 1.66 2.94 2.35

.68

.00 17.79 13-18 6

0 56 17 18 2

1 3

1 21 49 32 44 151 134 16 0

551 (1)

.16

.00 1.53

.46

.49

.05

.03

.08

.03

.57 1.34

.87 1.20 4.12 3.66

.44

.00 15.04 (2)

.07

.00

.65

.20

.21

.02

.01

.03

.01

.24

.57

.37

.51 1.75 1.55

.18

.00 6.37 19-24 0

0 5

2 2

6 3

0 3

4 1

0 3

32 16 0

0 77 (1)

.00

.14

.05

.16

.08

.00

.08

.11

.03

.00

.08

.87

.44

.00

.00 2.10 (2)

.00

.06

.02

.07

.03

.00

.03

.05

.01

.00

.03

.37

.18

.00

.89 GT 24 0

0 5

0 0

1 0

0 0

.2 1

0 0

9 (1)

.00

.14

.00

.03

.00

.05

.03

.00

.25 (2)

.00

.06

.00

.01

.00

.02

.01

.00

.10 ALL SPEEDS 212 94 198 197 262 124 158 152 133 176 196 220 333 582 479 148 0

3664 (1) 5.79 2.57 5.40 5.38 7.15 3.38 4.31 4.15 3.63 4.80 5.35 6.00 9.09 15.88 13.07 4.04

.00 100.00 (2) 2.45 1.09 2.29 2.28 3.03 1.43 1.83 1.76 1.54 2.03 2.27 2.54 3.85 6.73 5.54 1.71

.00 42.34 (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 JAN99-DEC99 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS E CLASS FREQUENCY (PERCENT)

=

31.18 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 0

0 0

0 1

1 0

0 0

1 0

0 0

5 (1)

.00

.07

.00

.04

.00

.04

.00

.19 (2)

.00

.02

.00

.01

.00

.01

.00

.06 C-3 19 20 26 39 25 13 17 17 26 38 44 35 48 59 49 31 0

506 (1)

.70

.74

.96 1.45

.93

.48

.63

.96 1.41 1.63 1.30 1.78 2.19 1.82 1.15

.00 18.75 (2)

.22

.23

.30

.45

.29

.15

.20

.30

.44

.51

.40

.55

.68

.57

.36

.00 5.85 4-7 34 17 25 27 44 27 54 59 84 111 127 253 174 204 141 48 0

1429 (1) 1.26

.63

.93 1.00 1.63 1.00 2.00 2.19 3.11 4.11 4.71 9.38 6.45 7.56 5.23 1.78

.00 52.97 (2)

.39

.20

.29

.31

.51

.31

.62

.68

.97 1.28 1.47 2.92 2.01 2.36 1.63

.55

.00 16.51 8-12 5

5 6

11 21 17 22 22 9

49 113 146 58 115 46 6

0 651 (1)

.19

.22

.41

.78

.63

.82

.33 1.82 4.19 5.41 2.15 4.26 1.70

.22

.00 24.13 (2)

.06

.07

.13

.24

.20

.25

.10

.57 1.31 1.69

.67 1.33

.53

.07

.00 7.52 13-18 1

1 2

6 5

2 4

8 1

6 9

7 1

27 4

7 0

91 (1)

.04

.07

.22

.19

.07

.15

.30

.04

.22

.33

.26

.04 1.00

.15

.26

.00 3.37 (2)

.01

.02

.07

.06

.02

.05

.09

.01

.07

.10

.08

.01

.31

.05

.08

.00 1.05 19-24 0

0 2

6 2

3 0

0 0

0 1

0 0

14 (1)

.00

.07

.22

.07

.11

.00

.04

.00

.52 (2)

.00

.02

.07

.02

.03

.00

.01

.00

.16 GT 24 0

0 1

0 0

1 0

0 0

2 (1M

.00

.04

.00

.04

.00

.07 (2)

.00

.01

.00

.01

.00

.02 ALL SPEEDS 59 45 62 89 97 63 98 107 120 204 293 442 281 405 241 92 0

2698 (1) 2.19 1.67 2.30 3.30 3.60 2.34 3.63 3.97 4.45 7.56 10.86 16.38 10.42 15.01 8.93 3.41

.00 100.00 (2)

.68

.52

.72 1.03 1.12

.73 1.13 1.24 1.39 2.36 3.39 5.11 3.25 4.68 2.79 1.06

.00 31.18 (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 JAN99-DEC99 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS F CLASS FREQUENCY (PERCENT)

=

8.49 WIND DIRECTION FROM SPEED N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW VRBL TOTAL MPH CALM 1

0 0

0 1

0 0

1 0

4 (1)

.14

.00

.14

.00

.14

.00

.14

.00

.54 (2)

.01

.00

.01

.00

.01

.00

.01

.00

.05 C-3 20 8

7 18 13 5

9 6

14 27 52 55 75 64 52 18 0

443 (1) 2.72 1.09

.95 2.45 1.77

.68 1.22

.82 1.90 3.67 7.07 7.48 10.20 8.71 7.07 2.45

.00 60.27 (2)

.23

.09

.08

.21

.15

.06

.10

.07

.16

.31

.60

.64

.87

.74

.60

.21

.00 5.12 4-7 2

2 2

7 5

3 3

3 6

20 23 44 38 58 59 7

0 282 (1)

.27

.95

.68

.41

.82 2.72 3.13 5.99 5.17 7.89 8.03

.95

.00 38.37 (2)

.02

.08

.06

.03

.07

.23

.27

.51

.44

.67

.68

.08

.00 3.26 8-12 0

0 0

2 0

0 0

0 1

0 0

2 1

0 0

6 (1)

.00

.27

.00

.14

.00

.27

.14

.00

.82 (2)

.00

.02

.00

.01

.00

.02

.01

.00

.07 13-18 0

0 0

0 (1)

.00

.00 (2)

.00

.00 19-24 0

0 0

0 (1)

.00

.00 (2)

.00

.00 GT 24 0

0 0

0 (1)

.00

.00 (2)

.00

.00 ALL SPEEDS 23 10 9

27 18 8

12 9

21 47 76 101 114 123 111 26 0

735 (1) 3.13 1.36 1.22 3.67 2.45 1.09 1.63 1.22 2.86 6.39 10.34 13.74 15.51 16.73 15.10 3.54

.00 100.00 (2)

.27

.12

.10

.31

.21

.09

.14

.10

.24

.54

.88 1.17 1.32 1.42 1.28

.30

.00 8.49 (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 JAN99-DEC99 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 43.0 FT WIND DATA STABILITY CLASS G CLASS FREQUENCY (PERCENT) =

7.75 WIND DIRECTION FROM N

NNE NE ENE E

1

.15

.0o 7

1.04

.08 1

.15

.01 0

.00

.00 0

.00

.00 0

.00

.00 0

.00

.00 9

1.34

.10 0

1

.00

.15

.00

.01 10 7

1.49 1.04

.12

.08 0

0

.00

.00 0

0

.00

.00 0

0

.00

.00 0

0

.00

.00 0

0

.00

.00 10 8

1.49 1.19

.12

.09 0

0

.00

.00 8

5 1.19

.75

.09

.06 0

1

.00

.15

.00

.01 0

0

.00

.00 0

0

.00

.00 0

0

.00

.00 0

0

.00

.00 8

6 1.19

.89

.09

.07 ESE SE SSE S

SSW SW WSW W

WNW NW NNW VRBL TOTAL 0

.00

.00 1

.15

.01 0

.00

.00 0

.00

.00 0

.00

.00 0

.00

.00 0

.00

.00 1

.15

.01 0

0 1

1

.00

.15

.00

.01

.01 5

1 5

7

.75

.15

.75 1.04

.06

.01

.06

.08 0

0 0

0

.00

.00 0

0 0

0

.00

.00 0

0 0

0

.00

.00 0

0 0

0

.00

.00 0

0 0

0

.00

.00 5

1 6

8

.75

.15

.89 1.19

.06

.01

.07

.09 0

3 1

2

.00

.45

.15

.30

.00

.03

.01

.02 50 70 157 152 7.45 10.43 23.40 22.65

.58

.81 1.81 1.76 8

15 20 44 1.19 2.24 2.98 6.56

.09

.17

.23

.51 0

0 0

0

.00

.00 0

0 0

0

.00

.00 0

0 0

0

.00

.00 0

0 0

0

.00

.00 58 88 178 198 8.64 13.11 26.53 29.51

.67 1.02 2.06 2.29 (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)

SPEED MPH CALM (1)

(2)

C-3 (1)

(2) 4-7 (1)

(2) 8-12 (1)

(2) 13-18 (1)

(2) 19-24 (1)

(2)

OT 24 (1)

(2)

ALL SPEEDS (1)

(2) 0 3

.00

.45

.00

.03 43 18 6.41 2.68

.50

.21 23 0

3.43

.00

.27

.00 0

0

.00

.00 0

0

.00

.00 0

0

.00

.00 0

0

.00

.00 66 21 9.84 3.13

.76

.24 0

13

.00 1.94

.00

.15 0

546

.00 81.37

.00 6.31 0

112

.00 16.69

.00 1.29 0

0

.00

.00 0

0

.00

.00 0

0

.00

.00 0

0

.00

.00 0

671

.00 100.00

.00 7.75

SEABROOK JAN99-DEC99 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

NEE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW VRBL TOTAL MPH CALM 2

2 2

0 0

0 1

1 1

4 1

3 0

4 0

23 (1)

.02

.00

.01

.05

.01

.03

.00

.05

.00

.27 (2)

.02

.00

.01

.05

.01

.03

.00

.05

.00

.27 C-3 61 49 60 96 58 21 45 36 58 86 152 168 308 303 159 78 0

1738 (1)

.70

.57

.69 1.11

.67

.24

.52

.42

.67

.99 1.76 1.94 3.56 3.50 1.84

.90

.00 20.09 (2)

.70

.57

.69 1.11

.67

.24

.52

.42

.67

.99 1.76 1.94 3.56 3.50 1.84

.90

.00 20.09 4-7 120 56 72 122 192 100 205 158 162 202 209 398 358 434 341 125 0

3254 (1) 1.39

.65

.83 1.41 2.22 1.16 2.37 1.83 1.87 2.33 2.42 4.60 4.14 5.02 3.94 1.44

.00 37.61 (2) 1.39

.65

.83 1.41 2.22 1.16 2.37 1.83 1.87 2.33 2.42 4.60 4.14 5.02 3.94 1.44

.00 37.61 8-12 133 59 84 103 195 112 187 96 60 150 240 285 235 433 275 79 0

2726 (1) 1.54

.68

.97 1.19 2.25 1.29 2.16 1.11

.69 1.73 2.77 3.29 2.72 5.00 3.18

.91

.00 31.50 (2) 1.54

.68

.97 1.19 2.25 1.29 2.16 1.11

.69 1.73 2.77 3.29 2.72 5.00 3.18

.91

.00 31.50 13-18 8

2 66 27 28 7

7 14 4

31 76 51 63 208 182 25 0

799 (1)

.09

.02

.76

.31

.32

.08

.16

.05

.36

.88

.59

.73 2.40 2.10

.29

.00 9.23 (2)

.09

.02

.76

.31

.32

.08

.16

.05

.36

.88

.59

.73 2.40 2.10

.29

.00 9.23 19-24 0

0 8

8 4

9 3

0 4

5 1

0 4

34 21 1

0 102 (1)

.00

.09

.05

.10

.03

.00

.05

.06

.01

.00

.05

.39

.24

.01

.00 1.18 (2)

.00

.09

.05

.10

.03

.00

.05

.06

.01

.00

.05

.39

.24

.01

.00 1.18 GT 24 0

0 6

0 0

2 0

0 0

2 1

0 o

11 (1)

.00

.07

.00

.02

.00

.02

.01

.00

.13 (2)

.00

.07

.00

.02

.00

.02

.01

.00

.13 ALL SPEEDS 324 168 298 356 477 251 448 305 289 475 679 906 969 1417 979 312 0

8653 (1) 3.74 1.94 3.44 4.11 5.51 2.90 5.18 3.52 3.34 5.49 7.85 10.47 11.20 16.38 11.31 3.61

.00 100.00 (2) 3.74 1.94 3.44 4.11 5.51 2.90 5.18 3.52 3.34 5.49 7.85 10.47 11.20 16.38 11.31 3.61

.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 JAN99-DEC99 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOaT TOWER) 209.0 FT WIND DATA STABILITY CLASS A CLASS FREQUENCY (PERCENT)

=

2.31 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 (1)

.00

.00 (2)

.00

.00 C-3 0

0 1

0 0

1 0

0 0

2 (1)

.00

.50

.00

.50

.00

.00 1.01 (2)

.00

.01

.00

.01

.00

.02 4-7 0

0 0

0 2

2 0

1 0

1 2

0 0

8 (1)

.00

.00 1.01 1.01

.00

.50

.00

.50 1.01

.00

.00 4.02 (2)

.00

.02

.00

.01

.00

.01

.02

.00

.09 8-12 0

1 0

0 12 14 38 8

0 4

1 2

2 3

0 0

0 85 (1)

.00

.50

.00

.00 6.03 7.04 19.10 4.02

.00 2.01

.50 1.01 1.01 1.51

.00

.00 42.71 (2)

.00

.01

.00

.14

.16

.44

.09

.00

.05

.01

.02

.03

.00

.99 13-18 0

1 0

2 3

3 29 22 2

3 7

2 3

3 0

2 0

82 (1)

.00

.50

.00 1.01 1.51 1.51 14.57 11.06 1.01 1.51 3.52 1.01 1.51 1.51

.00 1.01

.00 41.21 (2)

.00

.01

.00

.02

.03

.34

.26

.02

.03

.08

.02

.03

.00

.02

.00

.95 19-24 0

0 0

0 1

2 0

1 8

3 1

2 3

0 0

21 (1)

.00

.50 1.01

.00

.50 4.02 1.51

.50 1.01 1.51

.00

.00 10.55 (2)

.00

.01

.02

.00

.01

.09

.03

.01

.02

.03

.00

.24 GT 24 0

0 0

1 0

0 0

1 (1)

.00

.50

.00

.50 (2)

.00

.01

.00

.01 ALL SPEEDS 0

2 1

2 17 20 68 33 2

9 18 7

6 9

3 2

0 199 (1)

.00 1.01

.50 1.01 8.54 10.05 34.17 16.58 1.01 4.52 9.05 3.52 3.02 4.52 1.51 1.01

.00 100.00 (2)

.00

.02

.01

.02

.20

.23

.79

.38

.02

.10

.21

.08

.07

.10

.03

.02

.00 2.31

{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 JAN99-DEC99 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND DATA STABILITY CLASS B CLASS FREQUENCY (PERCENT)

=

2.51 WIND DIRECTION FROM SPEED N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW VREL TOTAL MPH CALM 0

0 0

0 (1)

.00

.00 (2)

.00

.00 C-3 0

0 0

0 (1)

.00

.00 (2)

.00

.00.

.00

.00 4-7 0

0 0

1 2

2 3

2 0

0 0

1 0

0 0

13 (1)

.00

.46

.93

.93 1.39

.93

.00

.93

.00

.46

.00

.00 6.02 (2)

.00

.01

.02

.03

.02

.00

.02

.00

.01

.00

.15 8-12 1

1 0

6 16 9

24 6

0 2

4 4

4 9

1 1

0 88 (1)

.46

.00 2.78 7.41 4.17 11.11 2.78

.00

.93 1.85 1.85 1.85 4.17

.46

.00 40.74 (2)

.01

.00

.07

.19

.10

.28

.07

.00

.02

.05

.10

.01

.00 1.02 13-18 4

2 1

2 0

0 8

14 2

2 3

9 6

12 12 2

0 79 (1) 1.85

.93

.46

.93

.00

.00 3.70 6.48

.93

.93 1.39 4.17 2.78 5.56 5.56

.93

.00 36.57 (2)

.05

.02

.01

.02

.00

.09

.16

.02

.03

.10

.07

.14

.02

.00

.92 19-24 0

0 2

2 0

0 0

0 2

1 2

0 3

2 11 1

0 26 (1)

.00

.93

.00

.93

.46

.93

.00 1.39

.93 5.09

.46

.00 12.04 (2)

.00

.02

.00

.02

.01

.02

.00

.03

.02

.13

.01

.00

.30 GT 24 0

0 0

0 1

5 2

1 0

10 (1)

.00

.46

.00

.46 2.31

.93

.46

.00 4.63 (2)

.00

.01

.00

.01

.06

.02

.01

.00

.12 ALL SPEEDS 5

3 3

11 18 11 35 22 4

7 10 13 14 29 26 5

0 216 (1) 2.31 1.39 1.39 5.09 8.33 5.09 16.20 10.19 1.85 3.24 4.63 6.02 6.48 13.43 12.04 2.31

.00 100.00 (2)

.06

.03

.13

.21

.13

.41

.26

.05

.08

.12

.15

.16

.34

.30

.06

.00 2.51 (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 JAN99-DEC99 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 PT WIND DATA STABILITY CLASS C CLASS FREQUENCY (PERCENT)

=

5.42 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 (1)

.00

.00 (2)

.00

.00 C-3 0

0 1

2 1

0 0

0 1

0 0

0 1

0 0

7 f1)

.00

.21

.00

.21

.43

.21

.00

.21

.00

.21

.00

.00 1.50 (2)

.00

.01

.00

.01

.02

.01

.00

.01

.00

.01

.00

.08 4-7 5

1 5

2 4

5 7

2 2

0 4

1 1

2 8

3 0

52 (1) 1.07

.21 1.07

.43

.86 1.07 1.50

.43

.00

.86

.21

.43 1.71

.64

.00 11.13 (2)

.06

.01

.06

.02

.05

.06

.08

.02

.00

.05

.01

.02

.09

.03

.00

.60 8-12 5

1 1

13 18 19 32 20 1

8 15 11 14 26 7

8 0

199 (1) 1.07

.21

.21 2.78 3.85 4.07 6.85 4.28

.21 1.71 3.21 2.36 3.00 5.57 1.50 1.71

.00 42.61 (2)

.06

.01

.15

.21

.22

.37

.23

.01

.09

.17

.13

.16

.30

.08

.09

.00 2.31 13-18 12 2

6 3

5 6

8 11 0

4 12 14 14 35 28 1

0 161 (1) 2.57

.43 1.28

.64 1.07 1.28 1.71 2.36

.00

.86 2.57 3.00 3.00 7.49 6.00

.21

.00 34.48 (2)

.14

.02

.07

.03

.06

.07

.09

.13

.00

.05

.14

.16

.41

.33

.01

.00 1.87 19-24 1

1 1

0 0

1 0

0 2

1 8

9 14 4

0 42 (1)

.21

.00

.21

.00

.43

.21 1.71 1.93 3.00

.86

.00 8.99 (2)

.01

.00

.01

.00

.02

.01

.09

.10

.16

.05

.00

.49 GT 24 0

0 0

0 1

0 0

1 2

1 1

0 0

6 (1)

.00

.21

.00

.21

.43

.21

.00

.00 1.28 (2)

.00

.01

.00

.01

.02

.01

.00

.07 ALL SPEEDS 23 5

14 18 28 32 48 34 4

12 34 28 39 73 59 16 0

467 (1) 4.93 1.07 3.00 3.85 6.00 6.85 10.28 7.28

.86 2.57 7.28 6.00 8.35 15.63 12.63 3.43

.00 100.00 (2)

.27

.06

.16

.21

.33

.37

.56

.39

.05

.14

.39

.33

.45

.85

.69

.19

.00 5.42 (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

.85 MPH)

SEABROOK JAN99-DEC99 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND DATA STABILITY CLASS D CLASS FREQUENCY (PERCENT)

=

42.32 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

1 2

0 0

3 (1)

.00

.03

.05

.00

.08 (2)

.00

.01

.02

.00

.03 C-3 2

9 11 16 12 9

6 4

12 4

1 4

3 8

4 11 0

116 (1)

.05

.25

.30

.44

.33

.25

.16

.11

.33

.11

.03

.11

.08

.22

.11

.30

.00 3.18 (2)

.02

.10

.13

.19

.14

.10

.07

.05

.14

.05

.01

.05

.03

.09

.05

.13

.00 1.35 4-7 31 20 26 49 65 51 61 43 33 21 22 25 44 35 39 44 0

609 (1)

.85

.55

.71 1.35 1.78 1.40 1.67 1.18

.91

.58

.60

.69 1.21

.96 1.07 1.21

.00 16.72 (2)

.36

.23

.30

.57

.76

.59

.71

.50

.38

.24

.26

.29

.51

.41

.45

.51

.00 7.07 8-12 88 33 44 57 75 70 88 72 72 75 59 59 92 146 131 55 0

1216 (1) 2.42

.91 1.21 1.56 2.06 1.92 2.42 1.98 1.98 2.06 1.62 1.62 2.53 4.01 3.60 1.51

.00 33.38 (2) 1.02

.38

.51

.66

.87

.81 1.02

.84

.87

.69

.69 1.07 1.70 1.52

.64

.00 14.12 13-18 107 59 68 20 24 11 14 44 35 49 99 84 121 178 206 42 0

1161 (1) 2.94 1.62 1.87

.55

.66

.30

.38 1.21

.96 1.35 2.72 2.31 3.32 4.89 5.65 1.15

.00 31.87 (2) 1.24

.69

.79

.23

.28

.13

.16

.51

.41

.57 1.15

.98 1.41 2.07 2.39

.49

.00 13.49 19-24 14 9

31 8

9 2

4 8

1 13 33 18 52 91 110 18 0

421 (1)

.38

.25

.85

.22

.25

.05

.11

.22

.03

.36

.91

.49 1.43 2.50 3.02

.49

.00 11.56 (2)

.16

.10

.36

.09

.10

.02

.05

.09

.01

.15

.38

.21

.60 1.06 1.28

.21

.00 4.89 GT 24 0

0 7

3 3

7 3

3 3

4 5

1 9

49 20 0

0 117 (1)

.00

.19

.08

.19

.08

.11

.14

.03

.25 1.35

.55

.00

.00 3.21 (2)

.00

.08

.03

.08

.03

.05

.06

.01

.10

.57

.23

.00

.00 1.36 ALL SPEEDS 242 130 187 154 190 150 176 174 156 166 219 191 321 507 510 170 0

3643 (1) 6.64 3.57 5.13 4.23 5.22 4.12 4.83 4.78 4.28 4.56 6.01 5.24 8.81 13.92 14.00 4.67

.00 100.00 (2) 2.81 1.51 2.17 1.79 2.21 1.74 2.04 2.02 1.81 1.93 2.54 2.22 3.73 5.89 5.92 1.97

.00 42.32 (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 JAN99-DEC99 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND DATA STABILITY CLASS E CLASS FREQUENCY (PERCENT)

=

31.25 WIND DIRECTION FROM SPEED N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW VRSL TOTAL MPH CALM 0

0 0

0 2

3 1

0 0

0 1

0 0

7 (1)

.00

.07

.1i

.04

.00

.04

.00

.26 (2)

.00

.02

.03

.01

.00

.01

.00

.08 C-3 5

4 5

16 13 11 6

9 3

5 6

4 5

4 4

2 0

102 (1)

.19

.15

.19

.59

.48

.41

.22

.33

.11

.19

.22

.15

.19

.15

.07

.00 3.79 (2)

.06

.05

.06

.19

.15

.13

.07

.10

.03

.06

.07

.05

.06

.05

.02

.00 1.18 4-7 17 18 22 21 16 31 42 24 26 28 22 14 22 24 29 18 0

374 (1)

.63

.67

.82

.78

.59 1.15 1.56

.89

.97 1.04

.82

.52

.82

.89 1.08

.67

.00 13.90 (2)

.20

.21

.26

.24

.19

.36

.49

.28

.30

.33

.26

.16

.26

.28

.34

.21

.00 4.34 8-12 49 37 9

18 19 11 25 67 81 119 133 119 97 146 131 70 0

1131 (1) 1.82 1.38

.33

.67

.71

.41

.93 2.49 3.01 4.42 4.94 4.42 3.61 5.43 4.87 2.60

.00 42.04 (2)

.57

.43

.10

.21

.22

.13

.29

.78

.94 1.38 1.54 1.38 1.13 1.70 1.52

.81

.00 13.14 13-18 18 8

10 2

10 10 14 25 24 68 136 209 114 166 91 21 0

926 (1)

.67

.30

.37

.07

.37

.52

.93

.89 2.53 5.06 7.77 4.24 6.17 3.38

.78

.00 34.42 (2)

.21

.09

.12

.02

.12

.16

.29

.28

.79 1.58 2.43 1.32 1.93 1.06

.24

.00 10.76 19-24 1

2 0

3 6

3 7

14 0

7 11 9

8 28 9

6 0

114 (1)

.04

.07

.00

.11

.22

.11

.26

.52

.00

.26

.41

.33

.30 1.04

.33

!22

.00 4.24 (2)

.01

.02

.00

.03

.07

.03

.08

.16

.00

.08

.13

.10

.09

.33

.10

.07

.00 1.32 GT 24 0

0 3

7 5

5 2

7 0

0 0

6 1

0 0

36 (1)

.00

.11

.26

.19

.07

.26

.00

.22

.04

.00

.00 1.34 (2)

.00

.03

.08

.06

.02

.08

.00

.07

.01

.00

.42 ALL SPEEDS 90 69 49 67 71 74 97 146 134 227 308 355 246 374 266 117 0

2690 (1) 3.35 2.57 1.82 2.49 2.64 2.75 3.61 5.43 4.98 8.44 11.45 13.20 9.14 13.90 9.89 4.35

.00 100.00 (2) 1.05

.80

.57

.78

.82

.86 1.13 1.70 1.56 2.64 3.58 4.12 2.86 4.34 3.09 1.36

.00 31.25 (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 JAN99-DEC99 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 1

0 1

3 4

4 1

1 0

0 1

0 0

0 1

2 0

19 (1)

.01

.00

.01

.03

.05

.01

.00

.01

.00

.01

.02

.00

.22 (2)

.01

.00

.01

.03

.05

.01

.00

.01

.00

.01

.02

.00

.22 C-3 14 20 23 37 35 35 30 24 24 17 16 13 11 18 13 22 0

352 (1)

.16

.23

.27

.43

.41

.35

.28

.20

.19

.15

.13

.21

.15

.26

.00 4.09 (2)

.16

.23

.27

.43

.41

.35

.28

.20

.19

.15

.13

.21

.15

.26

.00 4.09 4-7 74 48 68 83 99 102 130 104 99 92 104 80 104 84 98 91 0

1460 (1)

.86

.56

.79

.96 1.15 1.18 1.51 1.21 1.15 1.07 1.21

.93 1.21

.98 1.14 1.06

.00 16.96 (2)

.86

.56

.79

.96 1.15 1.18 1.51 1.21 1.15 1.07 1.21

.93 1.21

.98 1.14 1.06

.00 16.96 8-12 186 101 67 98 151 124 209 187 211 269 289 251 279 399 355 199 0

3375 (1) 2.16 1.17

.78 1.14 1.75 1.44 2.43 2.17 2.45 3.12 3.36 2.92 3.24 4.63 4.12 2.31

.00 39.20 (2) 2.16 1.17

.78 1.14 1.75 1.44 2.43 2.17 2.45 3.12 3.36 2.92 3.24 4.63 4.12 2.31

.00 39.20 13-18 146 74 85 30 44 31 73 121 68 139 274 347 277 427 373 96 0

2605 (1) 1.70

.86

.99

.35

.51

.36

.85 1.41

.79 1.61 3.18 4.03 3.22 4.96 4.33 1.12

.00 30.26 (2) 1.70

.86

.99

.35

.51

.36

.85 1.41

.79 1.61 3.18 4.03 3.22 4.96 4.33 1.12

.00 30.26 19-24 16 12 34 13 15 5

12 25 3

23 56 31 75 132 147 29 0

628 (1)

.19

.14

.39

.15

.17

.06

.14

.29

.03

.27

.65

.36

.87 1.53 1.71

.34

.00 7.29 (2)

.19

.14

.39

.15

.17

.06

.14

.29

.03

.27

.65

.36

.87 1.53 1.71

.34

.00 7.29 GT 24 0

0 10 10 8

12 5

10 4

4 6

2 12 62 24 1

0 170 (1)

.00

.12

.09

.14

.06

.12

.05

.07

.02

.14

.72

.28

.01

.00 1.97 (2)

.00

.12

.09

.14

.06

.12

.05

.07

.02

.14

.72

.28

.01

.00 1.97 ALL SPEEDS 437 255 288 274 356 313 460 472 409 544 746 724 758 1122 1011 440 0

8609 (1) 5.08 2.96 3.35 3.18 4.14 3.64 5.34 5.48 4.75 6.32 8.67 8.41 8.80 13.03 11.74 5.11

.00 100.00 (2) 5.08 2.96 3.35 3.18 4.14 3.64 5.34 5.48 4.75 6.32 8.67 8.41 8.80 13.03 11.74 5.11

.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 JAN99-DEC99 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND DATA STABILITY CLASS G CLASS FREQUENCY (PERCENT)

=

7.65 WIND DIRECTION FROM SPEED N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW VRBL TOTAL MPH CALM 1

0 0

1 0

0 0

0 1

0 0

2 0

6 (1)

.15

.00

.15

.00

.15

.00

.15

.00

.30

.00

.91 (2)

.01

.00

.01

.00

.01

.00

.01

.00

.02

.00

.07 C-3 4

4 0

2 6

8 11 5

4 5

6 4

2 1

2 7

0 71 (1)

.61

.00

.30

.91 1.21 1.67

.76

.61

.76

.91

.61

.30

.15

.30 1.06

.00 10.77 (2)

.05

.00

.02

.07

.09

.13

.06

.05

.06

.07

.05

.02

.01

.02

.08

.00

.82 4-7 14 5

9 8

2 2

8 14 17 23 30 27 29 15 14 12 0

229 (1) 2.12

.76 1.37 1.21

.30

.30 1.21 2.12 2.58 3.49 4.55 4.10 4.40 2.28 2.12 1.82

.00 34.75 (2)

.16

.06

.10

.09

.02

.09

.16

.20

.27

.35

.31

.34

.17

.16

.14

.00 2.66 8-12 20 13 8

2 2

0 1

7 21 24 28 31 40 25 38 27 0

287 (1) 3.03 1.97 1.21

.30

.00

.15 1.06 3.19 3.64 4.25 4.70 6.07 3.79 5.77 4.10

.00 43.55 (2)

.23

.15

.09

.02

.00

.01

.08

.24

.28

.33

.36

.46

.29

.44

.31

.00 3.33 13-18 0

1 0

0 0

2 3

2 6

10 7

11 14 10 0

66 (1)

.00

.15

.00

.30

.46

.30

.91 1.52 1.06 1.67 2.12 1.52

.00 10.02 (2)

.00

.01

.00

.02

.03

.02

.07

.12

.08

.13

.16

.12

.00

.77 19-24 0

0 0

0 (1)

.00

.00 (2)

.00

.00 GT 24 0

0 0

0 (1)

.00

.00 (2)

.00

.00 ALL SPEEDS 39 23 17 13 10 11 20 28 45 54 71 72 78 52 68 58 0

659 (1) 5.92 3.49 2.58 1.97 1.52 1.67 3.03 4.25 6.83 8.19 10.77 10.93 11.84 7.89 10.32 8.80

.00 100.00 (2)

.45

.27

.20

.15

.12

.13

.23

.33

.52

.63

.82

.84

.91

.60

.79

.67

.00 7.65 (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 JAN99-DEC99 MET DATA JOINT FREQUENCY DISTRIBUTION (210-FOOT TOWER) 209.0 FT WIND DATA STABILITY CLASS F CLASS FREQUENCY (PERCENT)

=

8.54 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

1 0

0 0

1 0

0 0

3 (1)

.00

.14

.00

.14

.00

.41 (2)

.00

.01

.00

.01

.00

.03 C-3 3

3 5

3 3

4 6

6 5

3 2

1 1

5 2

2 0

54 (1)

.41

.68

.41

.54

.82

.68

.41

.27

.14

.68

.27

.00 7.35 (2)

.03

.06

.03

.05

.07

.06

.03

.02

.01

.06

.02

.00

.63 4-7 7

4 6

2 8

9 9

18 21 17 24 13 8

7 8

14 0

175 (1)

.95

.54

.82

.27 1.09 1.22 1.22 2.45 2.86 2.31 3.27 1.77 1.09

.95 1.09 1.90

.00 23.81 (2)

.08

.05

.07

.02

.09

.10

.21

.24

.20

.28

.15

.09

.08

.09

.16

.00 2.03 8-12 23 15 5

2 9

1 1

7 36 37 49 25 30 44 47 38 0

369 (1) 3.13 2.04

.68

.27 1.22

.14

.95 4.90 5.03 6.67 3.40 4.08 5.99 6.39 5.17

.00 50.20 (2)

.27

.17

.06

.02

.10

.01

.08

.42

.43

.57

.29

.35

.51

.55

.44

.00 4.29 13-18 5

1 0

1 2

1 0

3 2

11 11 19 12 22 22 18 0

130 (1)

.68

.14

.00

.14

.27

.14

.00

.41

.27 1.50 1.50 2.59 1.63 2.99 2.99 2.45

.00 17.69 (21

.06

.01

.00

.01

.02

.01

.00

.03

.02

.13

.22

.14

.26

.21

.00 1.51 19-24 0

0 0

1 0

0 3

0 0

4 (1)

.00

.14

.00

.41

.00

.54 (2)

.00

.01

.00

.03

.00

.05

",GT24 0

0 0

0 (1}a

.00

.00 (21

.00

.00 ALL SPEEDS 38 23 17 9

22 15 16 35 64 69 86 58 54 78 79 72 0

735 (1) 5.17 3.13 2.31 1.22 2.99 2.04 2.18 4.76 8.71 9.39 11.70 7.89 7.35 10.61 10.75 9.80

.00 100.00 (2)

.44

.27

.20

.10

.26

.17

.19

.41

.74

.80 1.00

.67

.63

.91

.92

.84

.00 8.54 (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 NYN-00037 Radiation Dose Assessment

Seabrook Station Radiological Effluent Impact Assessment For 1999 (Annual Radioactive Effluent Release Report)

I.

Summary Doses resulting from liquid and gaseous effluents from Seabrook Station during 1999 were calculated in accordance with Method II as defined in the Station Offsite Dose Calculation Manual (ODCM). The calculational methods used follow the models in Regulatory Guide 1.109.

The calculations included maximum whole body doses and organ doses from all liquid releases, maximum offsite organ doses resulting from airborne iodines, tritium and particulate radionuclides, and maximum offsite beta air and gamma air doses from airborne noble gases.

Doses were also calculated for the special receptor locations inside the site boundary: the Science and Nature Center and the "Rocks". In addition, the potential direct dose from plant operation was evaluated. Doses from effluent releases and direct shine during 1999 are summarized in Table A.

The calculated maximum annual total body dose and the maximum organ dose from liquid effluents each represent 0.03% of the annual dose limits established by Technical Specification 3.11.1.2 (3 mrem total body and 10 mrem organ). The calculated annual maximum dose from airborne iodine, tritium and particulate radionuclides for offsite receptor locations represents 0.09% of the dose limit established by Technical Specification 3.11.2.3 (15 mrem organ), whereas the calculated maximum annual beta air and gamma air doses from airborne noble gases for offsite receptor locations represent 0.0003% and 0.0006% of the dose limits established by Technical Specification 3.11.2.2 (20 mrad beta air and 10 mrad gamma air). For onsite special receptors, the calculated annual doses from airborne effluents for both the Science and Nature Center and the "Rocks" were also well below all Technical Specification dose limits.

The sum of the maximum whole body doses from all exposure pathways for the liquid and gaseous effluents, plus the direct whole body dose from station operation, was 1.50E-02 mrem to a hypothetical individual at or beyond the site boundary. This whole body dose R:\\EED'JJB\\SBC937\\EFFLNT99.WPD

-I-

represents 0.06% of the annual whole body dose limit (25 mrem) for a member of the public as set forth in 40CFR190, and demonstrates compliance with that code. The maximum organ dose from all exposure pathways including direct dose was 1.71E-02 mrem. This represents 0.07% of the annual organ dose limit of 25 mrem to other organs, as set forth in EPA's environmental radiation standard for the uranium fuel cycle, 40CFR190.

R:\\EED\\JJB\\SBC937\\EFFLNT99.WPD II.

Method for Calculating the Total Body and Maximum Organ Doses Resulting from Liquid Releases The computer code IDLE, which is consistent with the models in Regulatory Guide 1.109 (Reference 1), was used to calculate the total body and organ doses resulting from liquid effluents from Seabrook Station. The general equations A-3, A-4, A-5, A-6 and A-7 from Regulatory Guide 1.109 are applied in IDLE. The total body doses and the 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. The values for the various factors considered in equations A-3 through A-7 have been taken from Regulatory Guide 1.109 and the Station Offsite Dose Calculation Manual (ODCM) (Reference 2). The specific values used for the usage factor (Uap), mixing ratio (Mp), bioaccumulation factor (Bip), dose factors (Dap), transit time (tP), transfer constant from water to sediment (K.), exposure time for sediment or soil (tb), and shore width factor (W) are provided by the reference sources as summarized in Table B. 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 (Ti) and their radioactive decay constants (1.) have been taken from Kocher (Reference 3).

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

Table A presents the calculated liquid pathway doses for each calendar quarter and also the total for the year.

R:\\EED\\JJB\\SBC937\\EFFLNT99.WPD III.

Method for Calculating the Gamma and Beta Air Doses from Noble Gases The computer codes AIRAD and AEOLUS 2 were used for the calculation of both the gamma and beta air doses resulting from noble gases present in gaseous effluents released from Seabrook Station. The features and use of AEOLUS 2 for the calculation of atmospheric dispersion factors (i.e., Chi/Q factors) from recorded meteorological data (i.e., meteorological data measurements taken during the time of the release) are described in section B.7.3.2 of Seabrook's ODCM. Meteorological dispersion factors concurrent with periods of gas releases are calculated by AEOLUS 2 and used in the gamma and beta air dose calculations performed by AIRAD. AIRAD is consistent with the models presented in Regulatory Guide 1.109, general equations B-4 and B-5. The values for the dose factors, DFjY and DFjO, have been taken from Table B-1 in Regulatory Guide 1.109.

Table A lists the calculated air doses for each calendar quarter, and the total for the year.

R:\\EED\\JJB\\SBC937\\EFFLNT99.WPD IV.

Method for Calculating the Critical Organ Dose Resulting from lodines, Tritium and Particulates with Ty12 Greater than 8 Days in Gaseous Releases The computer codes AEOLUS 2 and ATMODOS were used for the calculation of the organ doses resulting from iodines, tritium and particulates with half-lives greater than 8 days present in gaseous effluents released from Seabrook Station. The features and use of AEOLUS 2 for the calculation of atmospheric dispersion factors (i.e., Chi/Q factors) from recorded meteorological data (i.e., meteorological data measurements taken during the time of the release) are described in section B.7.3.2 of Seabrook's ODCM. Meteorological dispersion factors concurrent with periods of gas releases were calculated by AEOLUS 2 and used in the dose calculations by ATMODOS. ATMODOS calculates the organ doses ( i.e., dose to bone, liver, kidney, lung, lower large intestine, total body, and skin) due to the presence of radionuclides other than noble gases in gaseous effluents, and is consistent with the models presented in Appendix C of Regulatory Guide 1.109. The pathways considered in the dose calculations are the ground plane, inhalation, and ingestion of stored vegetables, fresh garden vegetables, and milk. The critical organ dose is determined for the offsite location (e.g., site boundary, nearest resident or farm) of receptor pathways as identified in the most recent annual land use census.

The total body dose contributions via the ground plane and inhalation pathways as calculated by ATMODOS have also been included in the total body dose estimates for the special receptor locations inside the site boundary. Regulatory Guide 1.109 equations C-1 through C-13 are applied in the ATMODOS calculation of the critical organ doses. The input data and assumptions are those provided in Appendix C of the Regulatory Guide, except where site specific data and assumptions have been identified in Tables B.7-2 and B.7-3 of Seabrook's ODCM. These two ODCM tables provide the options for special conditions, depending on the type of receptor being evaluated at a specific location, that can be applied in Method II calculations. The receptor type controls the exposure pathways for calculational purposes. The receptor types used in the dose calculations were a resident receptor (which considered the ground plane, inhalation and vegetable ingestion exposure pathways), a milk receptor (which considered the ground plane, inhalation, vegetable and milk ingestion exposure pathways) and a boundary and radius receptor (both of which considered the ground plane and inhalation R:\\EED\\JJB\\SBC937\\EFFLNT99.WPD exposure pathways). The resident and milk receptor locations for the various sector were based on the 1999 land use census data for Seabrook Station (Table D). The radius receptor locations were applied at several distances in the prevalent downwind sectors to insure that the location of the maximum doses were not overlooked.

Depletion of the plume during transport is considered by AEOLUS 2 in the calculations of atmospheric dispersion factors (e.g., calculation of [X/Q]°). A shielding factor (SF) of 0.7 is applied for residential structures. The source for the values of the various factors used in Regulatory Guide 1.109 dose equations C-I through C-13 are summarized in Table C.

R:\\EED\\JJB\\SBC937\\EFFLNT99.WPD V.

References

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, Reg. Guide 1.109, Rev 1, Oct. 1977.

2.

Station Offsite Dose Calculation Manual, Rev 19.

3.

Kocher, D.C., Dose-Rate Conversion Factors for Exposure to Photons and Electrons, Health Physics, Vol. 45, No. 3, Sept. 1983.

R:\\EED\\JJB\\SBC937\\EFFLNT99.WPD TABLE A (Sheet 1)

Seabrook Station 1999 Annual Radioactive Effluent Release Report Maximum(a) Off-Site Doses and Dose Commitments to Members of the Public Dose (mrem)(')

1st 2nd 3rd 4th Quarter Quarter Quarter Quarter Year&c)

Liquid Effluents:

Total Body Dose 2.95E-04 4.03E-04 5.12E-05 2.25E-05 7.72E-04 (1)

(1)

(2)

(1)

Organ Dose 4.41E-04 2.07E-03 2.15E-04 9.21E-05 2.82E-03 (3)

(3)

(4)

Airborne Effluents:

Organ Dose from Iodines, 3.28E-03 4.47E-03 3.43E-03 3.06E-03 1.42E-02 Tritium, and Particulates (5)

(6)

(7)

(8)

Noble Gases Beta Air 8.58E-06 3.27E-05 5.37E-06 1.07E-05 5.74E-05 (mrad)

(9)

(10)

(11)

(9)

Gamma 1.29E-05 1.79E-05 1.14E-05 1.81E-05 6.03E-05 Air (12)

(13)

(11)

(9)

(mrad)

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

Science and Nature Center (SW, 488m):

Beta Air Dose (mrad) 2.86E-09 1.83E-07 3.91E-09 1.50E-18 1.90E-07 Gamma Air Dose (mrad) 2.87E-09 3.53E-08 2.OOE-08 5.25E-09 6.34E-08 Organ Dose (mrem) 1.11E-06 3.98E-06 1.44E-06 1.06E-06 7.59E-06 (15)

(15)

(16)

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

Beta Air Dose (mrad) 3.16E-06 1.09E-07 7.45E-08 1.46E-07 3.49E-06 Gamma Air Dose (mrad) 2.34E-06 1.66E-08 1.96E-07 1.15E-07 2.67E-06 Organ Dose (mrem) 1.32E-04 1.1OE-04 1.21E-04 1.57E-04 5.20E-04 (16)

(16)

Direct Dose From Plant Operation(e) 0 R:AEED\\JJB\\SBC937\\EFFLNT99.WPD TABLE A (Sheet 2)

Seabrook Station 1999 Annual Radioactive Effluent Release Report NOTES:

(a)

"Maximum means the largest fraction of corresponding 1 OCFR50, Appendix I, dose design objective.

(b)

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

(1)

Adult (2)

Child (3)

GI-LLI of an adult (4)

Bone of a child (5)

Liver, kidney, lung, GI-LLI, thyroid, and whole body of a child, S 1210m (6)

Thyroid of a child, SW 1130m (7)

Liver, kidney, lung, GI-LLI, thyroid, and whole body of a child, W 1320m (8)

Liver, kidney, lung, GI-LLI, thyroid, and whole body of a child, NNW 1010m (9)

ESE 2276m (10)

SW 1022m (11)

W 974m (12)

ENE 2276m (13)

NW 914m (14)

Liver, kidney, lung, GI-LLI, thyroid, and whole body of a child, NW 1270m (15)

Lung of a teen (16)

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

(e)

Only station sources are considered since there are no other facilities within five miles of Seabrook Station. 1999 data for the closest off-site environmental TLD locations in each sector (as listed in Table B.4-1 of Seabrook's ODCM) were compared to preoperation data from 1986 1988 for the same locations. No statistical difference which could be attributed to station sources was identified.

R:AEED\\JJB\\SBC937\\EFFLNT99.WPD TABLE B (Sheet 1)

Seabrook Station 1999 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 Table A-1, Reg. Guide 1.109 factor Daipi Dose factor Tables E-1I through E-14, R.G. 1.109

t.

Nuclide transit time Section B.7.1, Station ODCM Kc Transfer coefficient from water to Reg. Guide 1.109 sediment th Soil exposure time Table B.7-2, Station ODCM W

Shoreline width factor Table A-2, Reg. Guide 1.109 (value=0.5)

R:\\EED\\JJB\\SBC937\\EFFLNT99.WPD TABLE C (Sheet 1)

Seabrook Station 1999 Annual Radioactive Effluent Release Report 3.1 0%

JU iii M

ijU L1Uii lI

'.asouu Releases Factor Definition Source tb Period of activity buildup in Reg. Guide 1.109 sediment or soil xi Nuclide decay constant Kocher (Reference 3)

DFGI; Ground plane dose factor Table E-6, Reg. Guide 1.109 WI-Atmospheric dispersion factor Calculated by AEOLUS 2 (Mod 5)

R, Breathing rate Table B.7-3, Station ODCM DFA,,o Inhalation dose factor Tables E-7 through E-10, R.G.1.109 di.

Nuclide deposition rate Reg. Guide 1.109 P

Soil surface density Table B.7-2, Station ODCM te Crop, leafy vegetable or pasture Table B.7-2, Station ODCM grass exposure perioa th Average time from crop harvest Table B.7-2, Station ODCM to consumption Y"

Agricultural productivity by unit Table B.7-2, Station ODCM area r

Fraction of deposited activity Table E-15, Reg. Guide 1.109 retained on crops, leafy vegetables, or pasture grass Biv Stable element transfer coefficient Table E-i, Reg. Guide 1.109 from soil to produce, leafy vegetable, or pasture grass p

Fractional equilibrium ratio Reg. Guide 1.109 H

Ambient absolute humidity Table B.7-2, Station ODCM Fm Stable element transfer coefficient Tables E-I and E-2, R.G. 1.109 from feed to milk tr Average time from feed to milk to Reg. Guide 1.109 consumption fp Fraction of the year that animals Table B.7-2, Station ODCM graze on pasture fý Fraction of animal daily feed that Table B.7-2, Station ODCM is pasture grass Ff Stable element transfer coefficient Table E-1, Reg. Guide 1.109 from feed to meat ts Average time from meat animal Table E-15, Reg. Guide 1.109 slaughter to consumption DFI).

Ingestion dose factor Tables E-Il through E-14, R.G.1.109 R:\\EEDVJJB\\SBC937\\EFFLNT99.WPD TABLE C (Sheet 2)

Seabrook Station 1999 Annual Radioactive Effluent Release Report R:\\EED\\JJB\\SBC937\\EFFLNT99.WPD Factor Definition Source UV Annual intake of produce Table B.7-3, Station ODCM ua Annual intake of milk Table B.7-3, Station ODCM UaF Annual intake of milk Table B.7-3, Station ODCM UaL Annual intake of meat Table B.7-3, Station ODCM UaL Annual intake of leafy vegetables Table B.7-3, Station ODCM fg Ingestion rate fractions for garden Reg. Guide 1.109 produce f,

Ingestion rate fractions for garden Reg. Guide 1.109 leafy vegetables Al, Rate constant for activity removal Table E-15, Reg. Guide 1.109 from plant and leaf surfaces by weathering QF Animal consumption rate Table E-3, Reg. Guide 1.109 TABLE D (Sheet 1)

Seabrook Station 1999 Annual Radioactive Effluent Release Report Receptor Locations* for Seabrook Station Milk Animals Nearest Nearest within 5 Mile Resident Garden Radius Sector mile (km) mile (km) mile (kin)

N 2.69 (4.34) 2.76 (4.44)

NNE 1.89(3.04) 1.95(3.14)

NE 1.82 (2.93) 2.25 (3.62)

ENE 1.44(2.32)

E 1.60 (2.57)

ESE 1.70 (2.74)

SE 1.46 (2.35)

SSE 2.13 (3.43)

S 0.75(1.21) 0.75 (1.21)

SSW 0.69(1.11) 0.76(1.22)

SW 0.70 (1.13) 1.09 (1.75) 3.26 (5.25)

WSW 1.02 (1.64) 1.02 (1.64)

W 0.82 (1.32) 0.83 (1.34)

WNW 0.69 (1.11) 0.85 (1.37) 2.95 4.74 3.79 6.10 4.73 7.61 NW 0.79 (1.27) 0.79 (1.27) 4.30 (6.93)

NNW 0.63 (1.01) 0.75 (1.21) 3.30 (5.32)

Locations based on 1999 Land Use Census.

R:\\EED\\JJB\\SBC937\\EFFLNT99.WPD

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1.0 INTRODUCTION

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